drivers/net/s2io.c

   1 /************************************************************************
   2  * s2io.c: A Linux PCI-X Ethernet driver for Neterion 10GbE Server NIC
   3  * Copyright(c) 2002-2007 Neterion Inc.
   4
   5  * This software may be used and distributed according to the terms of
   6  * the GNU General Public License (GPL), incorporated herein by reference.
   7  * Drivers based on or derived from this code fall under the GPL and must
   8  * retain the authorship, copyright and license notice.  This file is not
   9  * a complete program and may only be used when the entire operating
  10  * system is licensed under the GPL.
  11  * See the file COPYING in this distribution for more information.
  12  *
  13  * Credits:
  14  * Jeff Garzik          : For pointing out the improper error condition
  15  *                        check in the s2io_xmit routine and also some
  16  *                        issues in the Tx watch dog function. Also for
  17  *                        patiently answering all those innumerable
  18  *                        questions regaring the 2.6 porting issues.
  19  * Stephen Hemminger    : Providing proper 2.6 porting mechanism for some
  20  *                        macros available only in 2.6 Kernel.
  21  * Francois Romieu      : For pointing out all code part that were
  22  *                        deprecated and also styling related comments.
  23  * Grant Grundler       : For helping me get rid of some Architecture
  24  *                        dependent code.
  25  * Christopher Hellwig  : Some more 2.6 specific issues in the driver.
  26  *
  27  * The module loadable parameters that are supported by the driver and a brief
  28  * explaination of all the variables.
  29  *
  30  * rx_ring_num : This can be used to program the number of receive rings used
  31  * in the driver.
  32  * rx_ring_sz: This defines the number of receive blocks each ring can have.
  33  *     This is also an array of size 8.
  34  * rx_ring_mode: This defines the operation mode of all 8 rings. The valid
  35  *              values are 1, 2.
  36  * tx_fifo_num: This defines the number of Tx FIFOs thats used int the driver.
  37  * tx_fifo_len: This too is an array of 8. Each element defines the number of
  38  * Tx descriptors that can be associated with each corresponding FIFO.
  39  * intr_type: This defines the type of interrupt. The values can be 0(INTA),
  40  *     2(MSI_X). Default value is '2(MSI_X)'
  41  * lro_enable: Specifies whether to enable Large Receive Offload (LRO) or not.
  42  *     Possible values '1' for enable '0' for disable. Default is '0'
  43  * lro_max_pkts: This parameter defines maximum number of packets can be
  44  *     aggregated as a single large packet
  45  * napi: This parameter used to enable/disable NAPI (polling Rx)
  46  *     Possible values '1' for enable and '0' for disable. Default is '1'
  47  * ufo: This parameter used to enable/disable UDP Fragmentation Offload(UFO)
  48  *      Possible values '1' for enable and '0' for disable. Default is '0'
  49  * vlan_tag_strip: This can be used to enable or disable vlan stripping.
  50  *                 Possible values '1' for enable , '0' for disable.
  51  *                 Default is '2' - which means disable in promisc mode
  52  *                 and enable in non-promiscuous mode.
  53  * multiq: This parameter used to enable/disable MULTIQUEUE support.
  54  *      Possible values '1' for enable and '0' for disable. Default is '0'
  55  ************************************************************************/
  56
  57 #include <linux/module.h>
  58 #include <linux/types.h>
  59 #include <linux/errno.h>
  60 #include <linux/ioport.h>
  61 #include <linux/pci.h>
  62 #include <linux/dma-mapping.h>
  63 #include <linux/kernel.h>
  64 #include <linux/netdevice.h>
  65 #include <linux/etherdevice.h>
  66 #include <linux/skbuff.h>
  67 #include <linux/init.h>
  68 #include <linux/delay.h>
  69 #include <linux/stddef.h>
  70 #include <linux/ioctl.h>
  71 #include <linux/timex.h>
  72 #include <linux/ethtool.h>
  73 #include <linux/workqueue.h>
  74 #include <linux/if_vlan.h>
  75 #include <linux/ip.h>
  76 #include <linux/tcp.h>
  77 #include <net/tcp.h>
  78
  79 #include <asm/system.h>
  80 #include <asm/uaccess.h>
  81 #include <asm/io.h>
  82 #include <asm/div64.h>
  83 #include <asm/irq.h>
  84
  85 /* local include */
  86 #include "s2io.h"
  87 #include "s2io-regs.h"
  88
  89 #define DRV_VERSION "2.0.26.25"
  90
  91 /* S2io Driver name & version. */
  92 static char s2io_driver_name[] = "Neterion";
  93 static char s2io_driver_version[] = DRV_VERSION;
  94
  95 static int rxd_size[2] = {32,48};
  96 static int rxd_count[2] = {127,85};
  97
  98 static inline int RXD_IS_UP2DT(struct RxD_t *rxdp)
  99 {
 100         int ret;
 101
 102         ret = ((!(rxdp->Control_1 & RXD_OWN_XENA)) &&
 103                 (GET_RXD_MARKER(rxdp->Control_2) != THE_RXD_MARK));
 104
 105         return ret;
 106 }
 107
 108 /*
 109  * Cards with following subsystem_id have a link state indication
 110  * problem, 600B, 600C, 600D, 640B, 640C and 640D.
 111  * macro below identifies these cards given the subsystem_id.
 112  */
 113 #define CARDS_WITH_FAULTY_LINK_INDICATORS(dev_type, subid) \
 114         (dev_type == XFRAME_I_DEVICE) ?                 \
 115                 ((((subid >= 0x600B) && (subid <= 0x600D)) || \
 116                  ((subid >= 0x640B) && (subid <= 0x640D))) ? 1 : 0) : 0
 117
 118 #define LINK_IS_UP(val64) (!(val64 & (ADAPTER_STATUS_RMAC_REMOTE_FAULT | \
 119                                       ADAPTER_STATUS_RMAC_LOCAL_FAULT)))
 120
 121 static inline int is_s2io_card_up(const struct s2io_nic * sp)
 122 {
 123         return test_bit(__S2IO_STATE_CARD_UP, &sp->state);
 124 }
 125
 126 /* Ethtool related variables and Macros. */
 127 static char s2io_gstrings[][ETH_GSTRING_LEN] = {
 128         "Register test\t(offline)",
 129         "Eeprom test\t(offline)",
 130         "Link test\t(online)",
 131         "RLDRAM test\t(offline)",
 132         "BIST Test\t(offline)"
 133 };
 134
 135 static char ethtool_xena_stats_keys[][ETH_GSTRING_LEN] = {
 136         {"tmac_frms"},
 137         {"tmac_data_octets"},
 138         {"tmac_drop_frms"},
 139         {"tmac_mcst_frms"},
 140         {"tmac_bcst_frms"},
 141         {"tmac_pause_ctrl_frms"},
 142         {"tmac_ttl_octets"},
 143         {"tmac_ucst_frms"},
 144         {"tmac_nucst_frms"},
 145         {"tmac_any_err_frms"},
 146         {"tmac_ttl_less_fb_octets"},
 147         {"tmac_vld_ip_octets"},
 148         {"tmac_vld_ip"},
 149         {"tmac_drop_ip"},
 150         {"tmac_icmp"},
 151         {"tmac_rst_tcp"},
 152         {"tmac_tcp"},
 153         {"tmac_udp"},
 154         {"rmac_vld_frms"},
 155         {"rmac_data_octets"},
 156         {"rmac_fcs_err_frms"},
 157         {"rmac_drop_frms"},
 158         {"rmac_vld_mcst_frms"},
 159         {"rmac_vld_bcst_frms"},
 160         {"rmac_in_rng_len_err_frms"},
 161         {"rmac_out_rng_len_err_frms"},
 162         {"rmac_long_frms"},
 163         {"rmac_pause_ctrl_frms"},
 164         {"rmac_unsup_ctrl_frms"},
 165         {"rmac_ttl_octets"},
 166         {"rmac_accepted_ucst_frms"},
 167         {"rmac_accepted_nucst_frms"},
 168         {"rmac_discarded_frms"},
 169         {"rmac_drop_events"},
 170         {"rmac_ttl_less_fb_octets"},
 171         {"rmac_ttl_frms"},
 172         {"rmac_usized_frms"},
 173         {"rmac_osized_frms"},
 174         {"rmac_frag_frms"},
 175         {"rmac_jabber_frms"},
 176         {"rmac_ttl_64_frms"},
 177         {"rmac_ttl_65_127_frms"},
 178         {"rmac_ttl_128_255_frms"},
 179         {"rmac_ttl_256_511_frms"},
 180         {"rmac_ttl_512_1023_frms"},
 181         {"rmac_ttl_1024_1518_frms"},
 182         {"rmac_ip"},
 183         {"rmac_ip_octets"},
 184         {"rmac_hdr_err_ip"},
 185         {"rmac_drop_ip"},
 186         {"rmac_icmp"},
 187         {"rmac_tcp"},
 188         {"rmac_udp"},
 189         {"rmac_err_drp_udp"},
 190         {"rmac_xgmii_err_sym"},
 191         {"rmac_frms_q0"},
 192         {"rmac_frms_q1"},
 193         {"rmac_frms_q2"},
 194         {"rmac_frms_q3"},
 195         {"rmac_frms_q4"},
 196         {"rmac_frms_q5"},
 197         {"rmac_frms_q6"},
 198         {"rmac_frms_q7"},
 199         {"rmac_full_q0"},
 200         {"rmac_full_q1"},
 201         {"rmac_full_q2"},
 202         {"rmac_full_q3"},
 203         {"rmac_full_q4"},
 204         {"rmac_full_q5"},
 205         {"rmac_full_q6"},
 206         {"rmac_full_q7"},
 207         {"rmac_pause_cnt"},
 208         {"rmac_xgmii_data_err_cnt"},
 209         {"rmac_xgmii_ctrl_err_cnt"},
 210         {"rmac_accepted_ip"},
 211         {"rmac_err_tcp"},
 212         {"rd_req_cnt"},
 213         {"new_rd_req_cnt"},
 214         {"new_rd_req_rtry_cnt"},
 215         {"rd_rtry_cnt"},
 216         {"wr_rtry_rd_ack_cnt"},
 217         {"wr_req_cnt"},
 218         {"new_wr_req_cnt"},
 219         {"new_wr_req_rtry_cnt"},
 220         {"wr_rtry_cnt"},
 221         {"wr_disc_cnt"},
 222         {"rd_rtry_wr_ack_cnt"},
 223         {"txp_wr_cnt"},
 224         {"txd_rd_cnt"},
 225         {"txd_wr_cnt"},
 226         {"rxd_rd_cnt"},
 227         {"rxd_wr_cnt"},
 228         {"txf_rd_cnt"},
 229         {"rxf_wr_cnt"}
 230 };
 231
 232 static char ethtool_enhanced_stats_keys[][ETH_GSTRING_LEN] = {
 233         {"rmac_ttl_1519_4095_frms"},
 234         {"rmac_ttl_4096_8191_frms"},
 235         {"rmac_ttl_8192_max_frms"},
 236         {"rmac_ttl_gt_max_frms"},
 237         {"rmac_osized_alt_frms"},
 238         {"rmac_jabber_alt_frms"},
 239         {"rmac_gt_max_alt_frms"},
 240         {"rmac_vlan_frms"},
 241         {"rmac_len_discard"},
 242         {"rmac_fcs_discard"},
 243         {"rmac_pf_discard"},
 244         {"rmac_da_discard"},
 245         {"rmac_red_discard"},
 246         {"rmac_rts_discard"},
 247         {"rmac_ingm_full_discard"},
 248         {"link_fault_cnt"}
 249 };
 250
 251 static char ethtool_driver_stats_keys[][ETH_GSTRING_LEN] = {
 252         {"\n DRIVER STATISTICS"},
 253         {"single_bit_ecc_errs"},
 254         {"double_bit_ecc_errs"},
 255         {"parity_err_cnt"},
 256         {"serious_err_cnt"},
 257         {"soft_reset_cnt"},
 258         {"fifo_full_cnt"},
 259         {"ring_0_full_cnt"},
 260         {"ring_1_full_cnt"},
 261         {"ring_2_full_cnt"},
 262         {"ring_3_full_cnt"},
 263         {"ring_4_full_cnt"},
 264         {"ring_5_full_cnt"},
 265         {"ring_6_full_cnt"},
 266         {"ring_7_full_cnt"},
 267         {"alarm_transceiver_temp_high"},
 268         {"alarm_transceiver_temp_low"},
 269         {"alarm_laser_bias_current_high"},
 270         {"alarm_laser_bias_current_low"},
 271         {"alarm_laser_output_power_high"},
 272         {"alarm_laser_output_power_low"},
 273         {"warn_transceiver_temp_high"},
 274         {"warn_transceiver_temp_low"},
 275         {"warn_laser_bias_current_high"},
 276         {"warn_laser_bias_current_low"},
 277         {"warn_laser_output_power_high"},
 278         {"warn_laser_output_power_low"},
 279         {"lro_aggregated_pkts"},
 280         {"lro_flush_both_count"},
 281         {"lro_out_of_sequence_pkts"},
 282         {"lro_flush_due_to_max_pkts"},
 283         {"lro_avg_aggr_pkts"},
 284         {"mem_alloc_fail_cnt"},
 285         {"pci_map_fail_cnt"},
 286         {"watchdog_timer_cnt"},
 287         {"mem_allocated"},
 288         {"mem_freed"},
 289         {"link_up_cnt"},
 290         {"link_down_cnt"},
 291         {"link_up_time"},
 292         {"link_down_time"},
 293         {"tx_tcode_buf_abort_cnt"},
 294         {"tx_tcode_desc_abort_cnt"},
 295         {"tx_tcode_parity_err_cnt"},
 296         {"tx_tcode_link_loss_cnt"},
 297         {"tx_tcode_list_proc_err_cnt"},
 298         {"rx_tcode_parity_err_cnt"},
 299         {"rx_tcode_abort_cnt"},
 300         {"rx_tcode_parity_abort_cnt"},
 301         {"rx_tcode_rda_fail_cnt"},
 302         {"rx_tcode_unkn_prot_cnt"},
 303         {"rx_tcode_fcs_err_cnt"},
 304         {"rx_tcode_buf_size_err_cnt"},
 305         {"rx_tcode_rxd_corrupt_cnt"},
 306         {"rx_tcode_unkn_err_cnt"},
 307         {"tda_err_cnt"},
 308         {"pfc_err_cnt"},
 309         {"pcc_err_cnt"},
 310         {"tti_err_cnt"},
 311         {"tpa_err_cnt"},
 312         {"sm_err_cnt"},
 313         {"lso_err_cnt"},
 314         {"mac_tmac_err_cnt"},
 315         {"mac_rmac_err_cnt"},
 316         {"xgxs_txgxs_err_cnt"},
 317         {"xgxs_rxgxs_err_cnt"},
 318         {"rc_err_cnt"},
 319         {"prc_pcix_err_cnt"},
 320         {"rpa_err_cnt"},
 321         {"rda_err_cnt"},
 322         {"rti_err_cnt"},
 323         {"mc_err_cnt"}
 324 };
 325
 326 #define S2IO_XENA_STAT_LEN      ARRAY_SIZE(ethtool_xena_stats_keys)
 327 #define S2IO_ENHANCED_STAT_LEN  ARRAY_SIZE(ethtool_enhanced_stats_keys)
 328 #define S2IO_DRIVER_STAT_LEN    ARRAY_SIZE(ethtool_driver_stats_keys)
 329
 330 #define XFRAME_I_STAT_LEN (S2IO_XENA_STAT_LEN + S2IO_DRIVER_STAT_LEN )
 331 #define XFRAME_II_STAT_LEN (XFRAME_I_STAT_LEN + S2IO_ENHANCED_STAT_LEN )
 332
 333 #define XFRAME_I_STAT_STRINGS_LEN ( XFRAME_I_STAT_LEN * ETH_GSTRING_LEN )
 334 #define XFRAME_II_STAT_STRINGS_LEN ( XFRAME_II_STAT_LEN * ETH_GSTRING_LEN )
 335
 336 #define S2IO_TEST_LEN   ARRAY_SIZE(s2io_gstrings)
 337 #define S2IO_STRINGS_LEN        S2IO_TEST_LEN * ETH_GSTRING_LEN
 338
 339 #define S2IO_TIMER_CONF(timer, handle, arg, exp)                \
 340                         init_timer(&timer);                     \
 341                         timer.function = handle;                \
 342                         timer.data = (unsigned long) arg;       \
 343                         mod_timer(&timer, (jiffies + exp))      \
 344
 345 /* copy mac addr to def_mac_addr array */
 346 static void do_s2io_copy_mac_addr(struct s2io_nic *sp, int offset, u64 mac_addr)
 347 {
 348         sp->def_mac_addr[offset].mac_addr[5] = (u8) (mac_addr);
 349         sp->def_mac_addr[offset].mac_addr[4] = (u8) (mac_addr >> 8);
 350         sp->def_mac_addr[offset].mac_addr[3] = (u8) (mac_addr >> 16);
 351         sp->def_mac_addr[offset].mac_addr[2] = (u8) (mac_addr >> 24);
 352         sp->def_mac_addr[offset].mac_addr[1] = (u8) (mac_addr >> 32);
 353         sp->def_mac_addr[offset].mac_addr[0] = (u8) (mac_addr >> 40);
 354 }
 355 /* Add the vlan */
 356 static void s2io_vlan_rx_register(struct net_device *dev,
 357                                         struct vlan_group *grp)
 358 {
 359         int i;
 360         struct s2io_nic *nic = dev->priv;
 361         unsigned long flags[MAX_TX_FIFOS];
 362         struct mac_info *mac_control = &nic->mac_control;
 363         struct config_param *config = &nic->config;
 364
 365         for (i = 0; i < config->tx_fifo_num; i++)
 366                 spin_lock_irqsave(&mac_control->fifos[i].tx_lock, flags[i]);
 367
 368         nic->vlgrp = grp;
 369         for (i = config->tx_fifo_num - 1; i >= 0; i--)
 370                 spin_unlock_irqrestore(&mac_control->fifos[i].tx_lock,
 371                                 flags[i]);
 372 }
 373
 374 /* Unregister the vlan */
 375 static void s2io_vlan_rx_kill_vid(struct net_device *dev, unsigned long vid)
 376 {
 377         int i;
 378         struct s2io_nic *nic = dev->priv;
 379         unsigned long flags[MAX_TX_FIFOS];
 380         struct mac_info *mac_control = &nic->mac_control;
 381         struct config_param *config = &nic->config;
 382
 383         for (i = 0; i < config->tx_fifo_num; i++)
 384                 spin_lock_irqsave(&mac_control->fifos[i].tx_lock, flags[i]);
 385
 386         if (nic->vlgrp)
 387                 vlan_group_set_device(nic->vlgrp, vid, NULL);
 388
 389         for (i = config->tx_fifo_num - 1; i >= 0; i--)
 390                 spin_unlock_irqrestore(&mac_control->fifos[i].tx_lock,
 391                         flags[i]);
 392 }
 393
 394 /*
 395  * Constants to be programmed into the Xena's registers, to configure
 396  * the XAUI.
 397  */
 398
 399 #define END_SIGN        0x0
 400 static const u64 herc_act_dtx_cfg[] = {
 401         /* Set address */
 402         0x8000051536750000ULL, 0x80000515367500E0ULL,
 403         /* Write data */
 404         0x8000051536750004ULL, 0x80000515367500E4ULL,
 405         /* Set address */
 406         0x80010515003F0000ULL, 0x80010515003F00E0ULL,
 407         /* Write data */
 408         0x80010515003F0004ULL, 0x80010515003F00E4ULL,
 409         /* Set address */
 410         0x801205150D440000ULL, 0x801205150D4400E0ULL,
 411         /* Write data */
 412         0x801205150D440004ULL, 0x801205150D4400E4ULL,
 413         /* Set address */
 414         0x80020515F2100000ULL, 0x80020515F21000E0ULL,
 415         /* Write data */
 416         0x80020515F2100004ULL, 0x80020515F21000E4ULL,
 417         /* Done */
 418         END_SIGN
 419 };
 420
 421 static const u64 xena_dtx_cfg[] = {
 422         /* Set address */
 423         0x8000051500000000ULL, 0x80000515000000E0ULL,
 424         /* Write data */
 425         0x80000515D9350004ULL, 0x80000515D93500E4ULL,
 426         /* Set address */
 427         0x8001051500000000ULL, 0x80010515000000E0ULL,
 428         /* Write data */
 429         0x80010515001E0004ULL, 0x80010515001E00E4ULL,
 430         /* Set address */
 431         0x8002051500000000ULL, 0x80020515000000E0ULL,
 432         /* Write data */
 433         0x80020515F2100004ULL, 0x80020515F21000E4ULL,
 434         END_SIGN
 435 };
 436
 437 /*
 438  * Constants for Fixing the MacAddress problem seen mostly on
 439  * Alpha machines.
 440  */
 441 static const u64 fix_mac[] = {
 442         0x0060000000000000ULL, 0x0060600000000000ULL,
 443         0x0040600000000000ULL, 0x0000600000000000ULL,
 444         0x0020600000000000ULL, 0x0060600000000000ULL,
 445         0x0020600000000000ULL, 0x0060600000000000ULL,
 446         0x0020600000000000ULL, 0x0060600000000000ULL,
 447         0x0020600000000000ULL, 0x0060600000000000ULL,
 448         0x0020600000000000ULL, 0x0060600000000000ULL,
 449         0x0020600000000000ULL, 0x0060600000000000ULL,
 450         0x0020600000000000ULL, 0x0060600000000000ULL,
 451         0x0020600000000000ULL, 0x0060600000000000ULL,
 452         0x0020600000000000ULL, 0x0060600000000000ULL,
 453         0x0020600000000000ULL, 0x0060600000000000ULL,
 454         0x0020600000000000ULL, 0x0000600000000000ULL,
 455         0x0040600000000000ULL, 0x0060600000000000ULL,
 456         END_SIGN
 457 };
 458
 459 MODULE_LICENSE("GPL");
 460 MODULE_VERSION(DRV_VERSION);
 461
 462
 463 /* Module Loadable parameters. */
 464 S2IO_PARM_INT(tx_fifo_num, FIFO_DEFAULT_NUM);
 465 S2IO_PARM_INT(rx_ring_num, 1);
 466 S2IO_PARM_INT(multiq, 0);
 467 S2IO_PARM_INT(rx_ring_mode, 1);
 468 S2IO_PARM_INT(use_continuous_tx_intrs, 1);
 469 S2IO_PARM_INT(rmac_pause_time, 0x100);
 470 S2IO_PARM_INT(mc_pause_threshold_q0q3, 187);
 471 S2IO_PARM_INT(mc_pause_threshold_q4q7, 187);
 472 S2IO_PARM_INT(shared_splits, 0);
 473 S2IO_PARM_INT(tmac_util_period, 5);
 474 S2IO_PARM_INT(rmac_util_period, 5);
 475 S2IO_PARM_INT(l3l4hdr_size, 128);
 476 /* 0 is no steering, 1 is Priority steering, 2 is Default steering */
 477 S2IO_PARM_INT(tx_steering_type, TX_DEFAULT_STEERING);
 478 /* Frequency of Rx desc syncs expressed as power of 2 */
 479 S2IO_PARM_INT(rxsync_frequency, 3);
 480 /* Interrupt type. Values can be 0(INTA), 2(MSI_X) */
 481 S2IO_PARM_INT(intr_type, 2);
 482 /* Large receive offload feature */
 483 static unsigned int lro_enable;
 484 module_param_named(lro, lro_enable, uint, 0);
 485
 486 /* Max pkts to be aggregated by LRO at one time. If not specified,
 487  * aggregation happens until we hit max IP pkt size(64K)
 488  */
 489 S2IO_PARM_INT(lro_max_pkts, 0xFFFF);
 490 S2IO_PARM_INT(indicate_max_pkts, 0);
 491
 492 S2IO_PARM_INT(napi, 1);
 493 S2IO_PARM_INT(ufo, 0);
 494 S2IO_PARM_INT(vlan_tag_strip, NO_STRIP_IN_PROMISC);
 495
 496 static unsigned int tx_fifo_len[MAX_TX_FIFOS] =
 497     {DEFAULT_FIFO_0_LEN, [1 ...(MAX_TX_FIFOS - 1)] = DEFAULT_FIFO_1_7_LEN};
 498 static unsigned int rx_ring_sz[MAX_RX_RINGS] =
 499     {[0 ...(MAX_RX_RINGS - 1)] = SMALL_BLK_CNT};
 500 static unsigned int rts_frm_len[MAX_RX_RINGS] =
 501     {[0 ...(MAX_RX_RINGS - 1)] = 0 };
 502
 503 module_param_array(tx_fifo_len, uint, NULL, 0);
 504 module_param_array(rx_ring_sz, uint, NULL, 0);
 505 module_param_array(rts_frm_len, uint, NULL, 0);
 506
 507 /*
 508  * S2IO device table.
 509  * This table lists all the devices that this driver supports.
 510  */
 511 static struct pci_device_id s2io_tbl[] __devinitdata = {
 512         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_S2IO_WIN,
 513          PCI_ANY_ID, PCI_ANY_ID},
 514         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_S2IO_UNI,
 515          PCI_ANY_ID, PCI_ANY_ID},
 516         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_HERC_WIN,
 517          PCI_ANY_ID, PCI_ANY_ID},
 518         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_HERC_UNI,
 519          PCI_ANY_ID, PCI_ANY_ID},
 520         {0,}
 521 };
 522
 523 MODULE_DEVICE_TABLE(pci, s2io_tbl);
 524
 525 static struct pci_error_handlers s2io_err_handler = {
 526         .error_detected = s2io_io_error_detected,
 527         .slot_reset = s2io_io_slot_reset,
 528         .resume = s2io_io_resume,
 529 };
 530
 531 static struct pci_driver s2io_driver = {
 532       .name = "S2IO",
 533       .id_table = s2io_tbl,
 534       .probe = s2io_init_nic,
 535       .remove = __devexit_p(s2io_rem_nic),
 536       .err_handler = &s2io_err_handler,
 537 };
 538
 539 /* A simplifier macro used both by init and free shared_mem Fns(). */
 540 #define TXD_MEM_PAGE_CNT(len, per_each) ((len+per_each - 1) / per_each)
 541
 542 /* netqueue manipulation helper functions */
 543 static inline void s2io_stop_all_tx_queue(struct s2io_nic *sp)
 544 {
 545         if (!sp->config.multiq) {
 546                 int i;
 547
 548                 for (i = 0; i < sp->config.tx_fifo_num; i++)
 549                         sp->mac_control.fifos[i].queue_state = FIFO_QUEUE_STOP;
 550         }
 551         netif_tx_stop_all_queues(sp->dev);
 552 }
 553
 554 static inline void s2io_stop_tx_queue(struct s2io_nic *sp, int fifo_no)
 555 {
 556         if (!sp->config.multiq)
 557                 sp->mac_control.fifos[fifo_no].queue_state =
 558                         FIFO_QUEUE_STOP;
 559
 560         netif_tx_stop_all_queues(sp->dev);
 561 }
 562
 563 static inline void s2io_start_all_tx_queue(struct s2io_nic *sp)
 564 {
 565         if (!sp->config.multiq) {
 566                 int i;
 567
 568                 for (i = 0; i < sp->config.tx_fifo_num; i++)
 569                         sp->mac_control.fifos[i].queue_state = FIFO_QUEUE_START;
 570         }
 571         netif_tx_start_all_queues(sp->dev);
 572 }
 573
 574 static inline void s2io_start_tx_queue(struct s2io_nic *sp, int fifo_no)
 575 {
 576         if (!sp->config.multiq)
 577                 sp->mac_control.fifos[fifo_no].queue_state =
 578                         FIFO_QUEUE_START;
 579
 580         netif_tx_start_all_queues(sp->dev);
 581 }
 582
 583 static inline void s2io_wake_all_tx_queue(struct s2io_nic *sp)
 584 {
 585         if (!sp->config.multiq) {
 586                 int i;
 587
 588                 for (i = 0; i < sp->config.tx_fifo_num; i++)
 589                         sp->mac_control.fifos[i].queue_state = FIFO_QUEUE_START;
 590         }
 591         netif_tx_wake_all_queues(sp->dev);
 592 }
 593
 594 static inline void s2io_wake_tx_queue(
 595         struct fifo_info *fifo, int cnt, u8 multiq)
 596 {
 597
 598         if (multiq) {
 599                 if (cnt && __netif_subqueue_stopped(fifo->dev, fifo->fifo_no))
 600                         netif_wake_subqueue(fifo->dev, fifo->fifo_no);
 601         } else if (cnt && (fifo->queue_state == FIFO_QUEUE_STOP)) {
 602                 if (netif_queue_stopped(fifo->dev)) {
 603                         fifo->queue_state = FIFO_QUEUE_START;
 604                         netif_wake_queue(fifo->dev);
 605                 }
 606         }
 607 }
 608
 609 /**
 610  * init_shared_mem - Allocation and Initialization of Memory
 611  * @nic: Device private variable.
 612  * Description: The function allocates all the memory areas shared
 613  * between the NIC and the driver. This includes Tx descriptors,
 614  * Rx descriptors and the statistics block.
 615  */
 616
 617 static int init_shared_mem(struct s2io_nic *nic)
 618 {
 619         u32 size;
 620         void *tmp_v_addr, *tmp_v_addr_next;
 621         dma_addr_t tmp_p_addr, tmp_p_addr_next;
 622         struct RxD_block *pre_rxd_blk = NULL;
 623         int i, j, blk_cnt;
 624         int lst_size, lst_per_page;
 625         struct net_device *dev = nic->dev;
 626         unsigned long tmp;
 627         struct buffAdd *ba;
 628
 629         struct mac_info *mac_control;
 630         struct config_param *config;
 631         unsigned long long mem_allocated = 0;
 632
 633         mac_control = &nic->mac_control;
 634         config = &nic->config;
 635
 636
 637         /* Allocation and initialization of TXDLs in FIOFs */
 638         size = 0;
 639         for (i = 0; i < config->tx_fifo_num; i++) {
 640                 size += config->tx_cfg[i].fifo_len;
 641         }
 642         if (size > MAX_AVAILABLE_TXDS) {
 643                 DBG_PRINT(ERR_DBG, "s2io: Requested TxDs too high, ");
 644                 DBG_PRINT(ERR_DBG, "Requested: %d, max supported: 8192\n", size);
 645                 return -EINVAL;
 646         }
 647
 648         size = 0;
 649         for (i = 0; i < config->tx_fifo_num; i++) {
 650                 size = config->tx_cfg[i].fifo_len;
 651                 /*
 652                  * Legal values are from 2 to 8192
 653                  */
 654                 if (size < 2) {
 655                         DBG_PRINT(ERR_DBG, "s2io: Invalid fifo len (%d)", size);
 656                         DBG_PRINT(ERR_DBG, "for fifo %d\n", i);
 657                         DBG_PRINT(ERR_DBG, "s2io: Legal values for fifo len"
 658                                 "are 2 to 8192\n");
 659                         return -EINVAL;
 660                 }
 661         }
 662
 663         lst_size = (sizeof(struct TxD) * config->max_txds);
 664         lst_per_page = PAGE_SIZE / lst_size;
 665
 666         for (i = 0; i < config->tx_fifo_num; i++) {
 667                 int fifo_len = config->tx_cfg[i].fifo_len;
 668                 int list_holder_size = fifo_len * sizeof(struct list_info_hold);
 669                 mac_control->fifos[i].list_info = kzalloc(list_holder_size,
 670                                                           GFP_KERNEL);
 671                 if (!mac_control->fifos[i].list_info) {
 672                         DBG_PRINT(INFO_DBG,
 673                                   "Malloc failed for list_info\n");
 674                         return -ENOMEM;
 675                 }
 676                 mem_allocated += list_holder_size;
 677         }
 678         for (i = 0; i < config->tx_fifo_num; i++) {
 679                 int page_num = TXD_MEM_PAGE_CNT(config->tx_cfg[i].fifo_len,
 680                                                 lst_per_page);
 681                 mac_control->fifos[i].tx_curr_put_info.offset = 0;
 682                 mac_control->fifos[i].tx_curr_put_info.fifo_len =
 683                     config->tx_cfg[i].fifo_len - 1;
 684                 mac_control->fifos[i].tx_curr_get_info.offset = 0;
 685                 mac_control->fifos[i].tx_curr_get_info.fifo_len =
 686                     config->tx_cfg[i].fifo_len - 1;
 687                 mac_control->fifos[i].fifo_no = i;
 688                 mac_control->fifos[i].nic = nic;
 689                 mac_control->fifos[i].max_txds = MAX_SKB_FRAGS + 2;
 690                 mac_control->fifos[i].dev = dev;
 691
 692                 for (j = 0; j < page_num; j++) {
 693                         int k = 0;
 694                         dma_addr_t tmp_p;
 695                         void *tmp_v;
 696                         tmp_v = pci_alloc_consistent(nic->pdev,
 697                                                      PAGE_SIZE, &tmp_p);
 698                         if (!tmp_v) {
 699                                 DBG_PRINT(INFO_DBG,
 700                                           "pci_alloc_consistent ");
 701                                 DBG_PRINT(INFO_DBG, "failed for TxDL\n");
 702                                 return -ENOMEM;
 703                         }
 704                         /* If we got a zero DMA address(can happen on
 705                          * certain platforms like PPC), reallocate.
 706                          * Store virtual address of page we don't want,
 707                          * to be freed later.
 708                          */
 709                         if (!tmp_p) {
 710                                 mac_control->zerodma_virt_addr = tmp_v;
 711                                 DBG_PRINT(INIT_DBG,
 712                                 "%s: Zero DMA address for TxDL. ", dev->name);
 713                                 DBG_PRINT(INIT_DBG,
 714                                 "Virtual address %p\n", tmp_v);
 715                                 tmp_v = pci_alloc_consistent(nic->pdev,
 716                                                      PAGE_SIZE, &tmp_p);
 717                                 if (!tmp_v) {
 718                                         DBG_PRINT(INFO_DBG,
 719                                           "pci_alloc_consistent ");
 720                                         DBG_PRINT(INFO_DBG, "failed for TxDL\n");
 721                                         return -ENOMEM;
 722                                 }
 723                                 mem_allocated += PAGE_SIZE;
 724                         }
 725                         while (k < lst_per_page) {
 726                                 int l = (j * lst_per_page) + k;
 727                                 if (l == config->tx_cfg[i].fifo_len)
 728                                         break;
 729                                 mac_control->fifos[i].list_info[l].list_virt_addr =
 730                                     tmp_v + (k * lst_size);
 731                                 mac_control->fifos[i].list_info[l].list_phy_addr =
 732                                     tmp_p + (k * lst_size);
 733                                 k++;
 734                         }
 735                 }
 736         }
 737
 738         for (i = 0; i < config->tx_fifo_num; i++) {
 739                 size = config->tx_cfg[i].fifo_len;
 740                 mac_control->fifos[i].ufo_in_band_v
 741                         = kcalloc(size, sizeof(u64), GFP_KERNEL);
 742                 if (!mac_control->fifos[i].ufo_in_band_v)
 743                         return -ENOMEM;
 744                 mem_allocated += (size * sizeof(u64));
 745         }
 746
 747         /* Allocation and initialization of RXDs in Rings */
 748         size = 0;
 749         for (i = 0; i < config->rx_ring_num; i++) {
 750                 if (config->rx_cfg[i].num_rxd %
 751                     (rxd_count[nic->rxd_mode] + 1)) {
 752                         DBG_PRINT(ERR_DBG, "%s: RxD count of ", dev->name);
 753                         DBG_PRINT(ERR_DBG, "Ring%d is not a multiple of ",
 754                                   i);
 755                         DBG_PRINT(ERR_DBG, "RxDs per Block");
 756                         return FAILURE;
 757                 }
 758                 size += config->rx_cfg[i].num_rxd;
 759                 mac_control->rings[i].block_count =
 760                         config->rx_cfg[i].num_rxd /
 761                         (rxd_count[nic->rxd_mode] + 1 );
 762                 mac_control->rings[i].pkt_cnt = config->rx_cfg[i].num_rxd -
 763                         mac_control->rings[i].block_count;
 764         }
 765         if (nic->rxd_mode == RXD_MODE_1)
 766                 size = (size * (sizeof(struct RxD1)));
 767         else
 768                 size = (size * (sizeof(struct RxD3)));
 769
 770         for (i = 0; i < config->rx_ring_num; i++) {
 771                 mac_control->rings[i].rx_curr_get_info.block_index = 0;
 772                 mac_control->rings[i].rx_curr_get_info.offset = 0;
 773                 mac_control->rings[i].rx_curr_get_info.ring_len =
 774                     config->rx_cfg[i].num_rxd - 1;
 775                 mac_control->rings[i].rx_curr_put_info.block_index = 0;
 776                 mac_control->rings[i].rx_curr_put_info.offset = 0;
 777                 mac_control->rings[i].rx_curr_put_info.ring_len =
 778                     config->rx_cfg[i].num_rxd - 1;
 779                 mac_control->rings[i].nic = nic;
 780                 mac_control->rings[i].ring_no = i;
 781                 mac_control->rings[i].lro = lro_enable;
 782
 783                 blk_cnt = config->rx_cfg[i].num_rxd /
 784                                 (rxd_count[nic->rxd_mode] + 1);
 785                 /*  Allocating all the Rx blocks */
 786                 for (j = 0; j < blk_cnt; j++) {
 787                         struct rx_block_info *rx_blocks;
 788                         int l;
 789
 790                         rx_blocks = &mac_control->rings[i].rx_blocks[j];
 791                         size = SIZE_OF_BLOCK; //size is always page size
 792                         tmp_v_addr = pci_alloc_consistent(nic->pdev, size,
 793                                                           &tmp_p_addr);
 794                         if (tmp_v_addr == NULL) {
 795                                 /*
 796                                  * In case of failure, free_shared_mem()
 797                                  * is called, which should free any
 798                                  * memory that was alloced till the
 799                                  * failure happened.
 800                                  */
 801                                 rx_blocks->block_virt_addr = tmp_v_addr;
 802                                 return -ENOMEM;
 803                         }
 804                         mem_allocated += size;
 805                         memset(tmp_v_addr, 0, size);
 806                         rx_blocks->block_virt_addr = tmp_v_addr;
 807                         rx_blocks->block_dma_addr = tmp_p_addr;
 808                         rx_blocks->rxds = kmalloc(sizeof(struct rxd_info)*
 809                                                   rxd_count[nic->rxd_mode],
 810                                                   GFP_KERNEL);
 811                         if (!rx_blocks->rxds)
 812                                 return -ENOMEM;
 813                         mem_allocated +=
 814                         (sizeof(struct rxd_info)* rxd_count[nic->rxd_mode]);
 815                         for (l=0; l<rxd_count[nic->rxd_mode];l++) {
 816                                 rx_blocks->rxds[l].virt_addr =
 817                                         rx_blocks->block_virt_addr +
 818                                         (rxd_size[nic->rxd_mode] * l);
 819                                 rx_blocks->rxds[l].dma_addr =
 820                                         rx_blocks->block_dma_addr +
 821                                         (rxd_size[nic->rxd_mode] * l);
 822                         }
 823                 }
 824                 /* Interlinking all Rx Blocks */
 825                 for (j = 0; j < blk_cnt; j++) {
 826                         tmp_v_addr =
 827                                 mac_control->rings[i].rx_blocks[j].block_virt_addr;
 828                         tmp_v_addr_next =
 829                                 mac_control->rings[i].rx_blocks[(j + 1) %
 830                                               blk_cnt].block_virt_addr;
 831                         tmp_p_addr =
 832                                 mac_control->rings[i].rx_blocks[j].block_dma_addr;
 833                         tmp_p_addr_next =
 834                                 mac_control->rings[i].rx_blocks[(j + 1) %
 835                                               blk_cnt].block_dma_addr;
 836
 837                         pre_rxd_blk = (struct RxD_block *) tmp_v_addr;
 838                         pre_rxd_blk->reserved_2_pNext_RxD_block =
 839                             (unsigned long) tmp_v_addr_next;
 840                         pre_rxd_blk->pNext_RxD_Blk_physical =
 841                             (u64) tmp_p_addr_next;
 842                 }
 843         }
 844         if (nic->rxd_mode == RXD_MODE_3B) {
 845                 /*
 846                  * Allocation of Storages for buffer addresses in 2BUFF mode
 847                  * and the buffers as well.
 848                  */
 849                 for (i = 0; i < config->rx_ring_num; i++) {
 850                         blk_cnt = config->rx_cfg[i].num_rxd /
 851                            (rxd_count[nic->rxd_mode]+ 1);
 852                         mac_control->rings[i].ba =
 853                                 kmalloc((sizeof(struct buffAdd *) * blk_cnt),
 854                                      GFP_KERNEL);
 855                         if (!mac_control->rings[i].ba)
 856                                 return -ENOMEM;
 857                         mem_allocated +=(sizeof(struct buffAdd *) * blk_cnt);
 858                         for (j = 0; j < blk_cnt; j++) {
 859                                 int k = 0;
 860                                 mac_control->rings[i].ba[j] =
 861                                         kmalloc((sizeof(struct buffAdd) *
 862                                                 (rxd_count[nic->rxd_mode] + 1)),
 863                                                 GFP_KERNEL);
 864                                 if (!mac_control->rings[i].ba[j])
 865                                         return -ENOMEM;
 866                                 mem_allocated += (sizeof(struct buffAdd) *  \
 867                                         (rxd_count[nic->rxd_mode] + 1));
 868                                 while (k != rxd_count[nic->rxd_mode]) {
 869                                         ba = &mac_control->rings[i].ba[j][k];
 870
 871                                         ba->ba_0_org = (void *) kmalloc
 872                                             (BUF0_LEN + ALIGN_SIZE, GFP_KERNEL);
 873                                         if (!ba->ba_0_org)
 874                                                 return -ENOMEM;
 875                                         mem_allocated +=
 876                                                 (BUF0_LEN + ALIGN_SIZE);
 877                                         tmp = (unsigned long)ba->ba_0_org;
 878                                         tmp += ALIGN_SIZE;
 879                                         tmp &= ~((unsigned long) ALIGN_SIZE);
 880                                         ba->ba_0 = (void *) tmp;
 881
 882                                         ba->ba_1_org = (void *) kmalloc
 883                                             (BUF1_LEN + ALIGN_SIZE, GFP_KERNEL);
 884                                         if (!ba->ba_1_org)
 885                                                 return -ENOMEM;
 886                                         mem_allocated
 887                                                 += (BUF1_LEN + ALIGN_SIZE);
 888                                         tmp = (unsigned long) ba->ba_1_org;
 889                                         tmp += ALIGN_SIZE;
 890                                         tmp &= ~((unsigned long) ALIGN_SIZE);
 891                                         ba->ba_1 = (void *) tmp;
 892                                         k++;
 893                                 }
 894                         }
 895                 }
 896         }
 897
 898         /* Allocation and initialization of Statistics block */
 899         size = sizeof(struct stat_block);
 900         mac_control->stats_mem = pci_alloc_consistent
 901             (nic->pdev, size, &mac_control->stats_mem_phy);
 902
 903         if (!mac_control->stats_mem) {
 904                 /*
 905                  * In case of failure, free_shared_mem() is called, which
 906                  * should free any memory that was alloced till the
 907                  * failure happened.
 908                  */
 909                 return -ENOMEM;
 910         }
 911         mem_allocated += size;
 912         mac_control->stats_mem_sz = size;
 913
 914         tmp_v_addr = mac_control->stats_mem;
 915         mac_control->stats_info = (struct stat_block *) tmp_v_addr;
 916         memset(tmp_v_addr, 0, size);
 917         DBG_PRINT(INIT_DBG, "%s:Ring Mem PHY: 0x%llx\n", dev->name,
 918                   (unsigned long long) tmp_p_addr);
 919         mac_control->stats_info->sw_stat.mem_allocated += mem_allocated;
 920         return SUCCESS;
 921 }
 922
 923 /**
 924  * free_shared_mem - Free the allocated Memory
 925  * @nic:  Device private variable.
 926  * Description: This function is to free all memory locations allocated by
 927  * the init_shared_mem() function and return it to the kernel.
 928  */
 929
 930 static void free_shared_mem(struct s2io_nic *nic)
 931 {
 932         int i, j, blk_cnt, size;
 933         void *tmp_v_addr;
 934         dma_addr_t tmp_p_addr;
 935         struct mac_info *mac_control;
 936         struct config_param *config;
 937         int lst_size, lst_per_page;
 938         struct net_device *dev;
 939         int page_num = 0;
 940
 941         if (!nic)
 942                 return;
 943
 944         dev = nic->dev;
 945
 946         mac_control = &nic->mac_control;
 947         config = &nic->config;
 948
 949         lst_size = (sizeof(struct TxD) * config->max_txds);
 950         lst_per_page = PAGE_SIZE / lst_size;
 951
 952         for (i = 0; i < config->tx_fifo_num; i++) {
 953                 page_num = TXD_MEM_PAGE_CNT(config->tx_cfg[i].fifo_len,
 954                                                         lst_per_page);
 955                 for (j = 0; j < page_num; j++) {
 956                         int mem_blks = (j * lst_per_page);
 957                         if (!mac_control->fifos[i].list_info)
 958                                 return;
 959                         if (!mac_control->fifos[i].list_info[mem_blks].
 960                                  list_virt_addr)
 961                                 break;
 962                         pci_free_consistent(nic->pdev, PAGE_SIZE,
 963                                             mac_control->fifos[i].
 964                                             list_info[mem_blks].
 965                                             list_virt_addr,
 966                                             mac_control->fifos[i].
 967                                             list_info[mem_blks].
 968                                             list_phy_addr);
 969                         nic->mac_control.stats_info->sw_stat.mem_freed
 970                                                 += PAGE_SIZE;
 971                 }
 972                 /* If we got a zero DMA address during allocation,
 973                  * free the page now
 974                  */
 975                 if (mac_control->zerodma_virt_addr) {
 976                         pci_free_consistent(nic->pdev, PAGE_SIZE,
 977                                             mac_control->zerodma_virt_addr,
 978                                             (dma_addr_t)0);
 979                         DBG_PRINT(INIT_DBG,
 980                                 "%s: Freeing TxDL with zero DMA addr. ",
 981                                 dev->name);
 982                         DBG_PRINT(INIT_DBG, "Virtual address %p\n",
 983                                 mac_control->zerodma_virt_addr);
 984                         nic->mac_control.stats_info->sw_stat.mem_freed
 985                                                 += PAGE_SIZE;
 986                 }
 987                 kfree(mac_control->fifos[i].list_info);
 988                 nic->mac_control.stats_info->sw_stat.mem_freed +=
 989                 (nic->config.tx_cfg[i].fifo_len *sizeof(struct list_info_hold));
 990         }
 991
 992         size = SIZE_OF_BLOCK;
 993         for (i = 0; i < config->rx_ring_num; i++) {
 994                 blk_cnt = mac_control->rings[i].block_count;
 995                 for (j = 0; j < blk_cnt; j++) {
 996                         tmp_v_addr = mac_control->rings[i].rx_blocks[j].
 997                                 block_virt_addr;
 998                         tmp_p_addr = mac_control->rings[i].rx_blocks[j].
 999                                 block_dma_addr;
1000                         if (tmp_v_addr == NULL)
1001                                 break;
1002                         pci_free_consistent(nic->pdev, size,
1003                                             tmp_v_addr, tmp_p_addr);
1004                         nic->mac_control.stats_info->sw_stat.mem_freed += size;
1005                         kfree(mac_control->rings[i].rx_blocks[j].rxds);
1006                         nic->mac_control.stats_info->sw_stat.mem_freed +=
1007                         ( sizeof(struct rxd_info)* rxd_count[nic->rxd_mode]);
1008                 }
1009         }
1010
1011         if (nic->rxd_mode == RXD_MODE_3B) {
1012                 /* Freeing buffer storage addresses in 2BUFF mode. */
1013                 for (i = 0; i < config->rx_ring_num; i++) {
1014                         blk_cnt = config->rx_cfg[i].num_rxd /
1015                             (rxd_count[nic->rxd_mode] + 1);
1016                         for (j = 0; j < blk_cnt; j++) {
1017                                 int k = 0;
1018                                 if (!mac_control->rings[i].ba[j])
1019                                         continue;
1020                                 while (k != rxd_count[nic->rxd_mode]) {
1021                                         struct buffAdd *ba =
1022                                                 &mac_control->rings[i].ba[j][k];
1023                                         kfree(ba->ba_0_org);
1024                                         nic->mac_control.stats_info->sw_stat.\
1025                                         mem_freed += (BUF0_LEN + ALIGN_SIZE);
1026                                         kfree(ba->ba_1_org);
1027                                         nic->mac_control.stats_info->sw_stat.\
1028                                         mem_freed += (BUF1_LEN + ALIGN_SIZE);
1029                                         k++;
1030                                 }
1031                                 kfree(mac_control->rings[i].ba[j]);
1032                                 nic->mac_control.stats_info->sw_stat.mem_freed +=
1033                                         (sizeof(struct buffAdd) *
1034                                         (rxd_count[nic->rxd_mode] + 1));
1035                         }
1036                         kfree(mac_control->rings[i].ba);
1037                         nic->mac_control.stats_info->sw_stat.mem_freed +=
1038                         (sizeof(struct buffAdd *) * blk_cnt);
1039                 }
1040         }
1041
1042         for (i = 0; i < nic->config.tx_fifo_num; i++) {
1043                 if (mac_control->fifos[i].ufo_in_band_v) {
1044                         nic->mac_control.stats_info->sw_stat.mem_freed
1045                                 += (config->tx_cfg[i].fifo_len * sizeof(u64));
1046                         kfree(mac_control->fifos[i].ufo_in_band_v);
1047                 }
1048         }
1049
1050         if (mac_control->stats_mem) {
1051                 nic->mac_control.stats_info->sw_stat.mem_freed +=
1052                         mac_control->stats_mem_sz;
1053                 pci_free_consistent(nic->pdev,
1054                                     mac_control->stats_mem_sz,
1055                                     mac_control->stats_mem,
1056                                     mac_control->stats_mem_phy);
1057         }
1058 }
1059
1060 /**
1061  * s2io_verify_pci_mode -
1062  */
1063
1064 static int s2io_verify_pci_mode(struct s2io_nic *nic)
1065 {
1066         struct XENA_dev_config __iomem *bar0 = nic->bar0;
1067         register u64 val64 = 0;
1068         int     mode;
1069
1070         val64 = readq(&bar0->pci_mode);
1071         mode = (u8)GET_PCI_MODE(val64);
1072
1073         if ( val64 & PCI_MODE_UNKNOWN_MODE)
1074                 return -1;      /* Unknown PCI mode */
1075         return mode;
1076 }
1077
1078 #define NEC_VENID   0x1033
1079 #define NEC_DEVID   0x0125
1080 static int s2io_on_nec_bridge(struct pci_dev *s2io_pdev)
1081 {
1082         struct pci_dev *tdev = NULL;
1083         while ((tdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, tdev)) != NULL) {
1084                 if (tdev->vendor == NEC_VENID && tdev->device == NEC_DEVID) {
1085                         if (tdev->bus == s2io_pdev->bus->parent) {
1086                                 pci_dev_put(tdev);
1087                                 return 1;
1088                         }
1089                 }
1090         }
1091         return 0;
1092 }
1093
1094 static int bus_speed[8] = {33, 133, 133, 200, 266, 133, 200, 266};
1095 /**
1096  * s2io_print_pci_mode -
1097  */
1098 static int s2io_print_pci_mode(struct s2io_nic *nic)
1099 {
1100         struct XENA_dev_config __iomem *bar0 = nic->bar0;
1101         register u64 val64 = 0;
1102         int     mode;
1103         struct config_param *config = &nic->config;
1104
1105         val64 = readq(&bar0->pci_mode);
1106         mode = (u8)GET_PCI_MODE(val64);
1107
1108         if ( val64 & PCI_MODE_UNKNOWN_MODE)
1109                 return -1;      /* Unknown PCI mode */
1110
1111         config->bus_speed = bus_speed[mode];
1112
1113         if (s2io_on_nec_bridge(nic->pdev)) {
1114                 DBG_PRINT(ERR_DBG, "%s: Device is on PCI-E bus\n",
1115                                                         nic->dev->name);
1116                 return mode;
1117         }
1118
1119         if (val64 & PCI_MODE_32_BITS) {
1120                 DBG_PRINT(ERR_DBG, "%s: Device is on 32 bit ", nic->dev->name);
1121         } else {
1122                 DBG_PRINT(ERR_DBG, "%s: Device is on 64 bit ", nic->dev->name);
1123         }
1124
1125         switch(mode) {
1126                 case PCI_MODE_PCI_33:
1127                         DBG_PRINT(ERR_DBG, "33MHz PCI bus\n");
1128                         break;
1129                 case PCI_MODE_PCI_66:
1130                         DBG_PRINT(ERR_DBG, "66MHz PCI bus\n");
1131                         break;
1132                 case PCI_MODE_PCIX_M1_66:
1133                         DBG_PRINT(ERR_DBG, "66MHz PCIX(M1) bus\n");
1134                         break;
1135                 case PCI_MODE_PCIX_M1_100:
1136                         DBG_PRINT(ERR_DBG, "100MHz PCIX(M1) bus\n");
1137                         break;
1138                 case PCI_MODE_PCIX_M1_133:
1139                         DBG_PRINT(ERR_DBG, "133MHz PCIX(M1) bus\n");
1140                         break;
1141                 case PCI_MODE_PCIX_M2_66:
1142                         DBG_PRINT(ERR_DBG, "133MHz PCIX(M2) bus\n");
1143                         break;
1144                 case PCI_MODE_PCIX_M2_100:
1145                         DBG_PRINT(ERR_DBG, "200MHz PCIX(M2) bus\n");
1146                         break;
1147                 case PCI_MODE_PCIX_M2_133:
1148                         DBG_PRINT(ERR_DBG, "266MHz PCIX(M2) bus\n");
1149                         break;
1150                 default:
1151                         return -1;      /* Unsupported bus speed */
1152         }
1153
1154         return mode;
1155 }
1156
1157 /**
1158  *  init_tti - Initialization transmit traffic interrupt scheme
1159  *  @nic: device private variable
1160  *  @link: link status (UP/DOWN) used to enable/disable continuous
1161  *  transmit interrupts
1162  *  Description: The function configures transmit traffic interrupts
1163  *  Return Value:  SUCCESS on success and
1164  *  '-1' on failure
1165  */
1166
1167 static int init_tti(struct s2io_nic *nic, int link)
1168 {
1169         struct XENA_dev_config __iomem *bar0 = nic->bar0;
1170         register u64 val64 = 0;
1171         int i;
1172         struct config_param *config;
1173
1174         config = &nic->config;
1175
1176         for (i = 0; i < config->tx_fifo_num; i++) {
1177                 /*
1178                  * TTI Initialization. Default Tx timer gets us about
1179                  * 250 interrupts per sec. Continuous interrupts are enabled
1180                  * by default.
1181                  */
1182                 if (nic->device_type == XFRAME_II_DEVICE) {
1183                         int count = (nic->config.bus_speed * 125)/2;
1184                         val64 = TTI_DATA1_MEM_TX_TIMER_VAL(count);
1185                 } else
1186                         val64 = TTI_DATA1_MEM_TX_TIMER_VAL(0x2078);
1187
1188                 val64 |= TTI_DATA1_MEM_TX_URNG_A(0xA) |
1189                                 TTI_DATA1_MEM_TX_URNG_B(0x10) |
1190                                 TTI_DATA1_MEM_TX_URNG_C(0x30) |
1191                                 TTI_DATA1_MEM_TX_TIMER_AC_EN;
1192                 if (i == 0)
1193                         if (use_continuous_tx_intrs && (link == LINK_UP))
1194                                 val64 |= TTI_DATA1_MEM_TX_TIMER_CI_EN;
1195                 writeq(val64, &bar0->tti_data1_mem);
1196
1197                 if (nic->config.intr_type == MSI_X) {
1198                         val64 = TTI_DATA2_MEM_TX_UFC_A(0x10) |
1199                                 TTI_DATA2_MEM_TX_UFC_B(0x100) |
1200                                 TTI_DATA2_MEM_TX_UFC_C(0x200) |
1201                                 TTI_DATA2_MEM_TX_UFC_D(0x300);
1202                 } else {
1203                         if ((nic->config.tx_steering_type ==
1204                                 TX_DEFAULT_STEERING) &&
1205                                 (config->tx_fifo_num > 1) &&
1206                                 (i >= nic->udp_fifo_idx) &&
1207                                 (i < (nic->udp_fifo_idx +
1208                                 nic->total_udp_fifos)))
1209                                 val64 = TTI_DATA2_MEM_TX_UFC_A(0x50) |
1210                                         TTI_DATA2_MEM_TX_UFC_B(0x80) |
1211                                         TTI_DATA2_MEM_TX_UFC_C(0x100) |
1212                                         TTI_DATA2_MEM_TX_UFC_D(0x120);
1213                         else
1214                                 val64 = TTI_DATA2_MEM_TX_UFC_A(0x10) |
1215                                         TTI_DATA2_MEM_TX_UFC_B(0x20) |
1216                                         TTI_DATA2_MEM_TX_UFC_C(0x40) |
1217                                         TTI_DATA2_MEM_TX_UFC_D(0x80);
1218                 }
1219
1220                 writeq(val64, &bar0->tti_data2_mem);
1221
1222                 val64 = TTI_CMD_MEM_WE | TTI_CMD_MEM_STROBE_NEW_CMD |
1223                                 TTI_CMD_MEM_OFFSET(i);
1224                 writeq(val64, &bar0->tti_command_mem);
1225
1226                 if (wait_for_cmd_complete(&bar0->tti_command_mem,
1227                         TTI_CMD_MEM_STROBE_NEW_CMD, S2IO_BIT_RESET) != SUCCESS)
1228                         return FAILURE;
1229         }
1230
1231         return SUCCESS;
1232 }
1233
1234 /**
1235  *  init_nic - Initialization of hardware
1236  *  @nic: device private variable
1237  *  Description: The function sequentially configures every block
1238  *  of the H/W from their reset values.
1239  *  Return Value:  SUCCESS on success and
1240  *  '-1' on failure (endian settings incorrect).
1241  */
1242
1243 static int init_nic(struct s2io_nic *nic)
1244 {
1245         struct XENA_dev_config __iomem *bar0 = nic->bar0;
1246         struct net_device *dev = nic->dev;
1247         register u64 val64 = 0;
1248         void __iomem *add;
1249         u32 time;
1250         int i, j;
1251         struct mac_info *mac_control;
1252         struct config_param *config;
1253         int dtx_cnt = 0;
1254         unsigned long long mem_share;
1255         int mem_size;
1256
1257         mac_control = &nic->mac_control;
1258         config = &nic->config;
1259
1260         /* to set the swapper controle on the card */
1261         if(s2io_set_swapper(nic)) {
1262                 DBG_PRINT(ERR_DBG,"ERROR: Setting Swapper failed\n");
1263                 return -EIO;
1264         }
1265
1266         /*
1267          * Herc requires EOI to be removed from reset before XGXS, so..
1268          */
1269         if (nic->device_type & XFRAME_II_DEVICE) {
1270                 val64 = 0xA500000000ULL;
1271                 writeq(val64, &bar0->sw_reset);
1272                 msleep(500);
1273                 val64 = readq(&bar0->sw_reset);
1274         }
1275
1276         /* Remove XGXS from reset state */
1277         val64 = 0;
1278         writeq(val64, &bar0->sw_reset);
1279         msleep(500);
1280         val64 = readq(&bar0->sw_reset);
1281
1282         /* Ensure that it's safe to access registers by checking
1283          * RIC_RUNNING bit is reset. Check is valid only for XframeII.
1284          */
1285         if (nic->device_type == XFRAME_II_DEVICE) {
1286                 for (i = 0; i < 50; i++) {
1287                         val64 = readq(&bar0->adapter_status);
1288                         if (!(val64 & ADAPTER_STATUS_RIC_RUNNING))
1289                                 break;
1290                         msleep(10);
1291                 }
1292                 if (i == 50)
1293                         return -ENODEV;
1294         }
1295
1296         /*  Enable Receiving broadcasts */
1297         add = &bar0->mac_cfg;
1298         val64 = readq(&bar0->mac_cfg);
1299         val64 |= MAC_RMAC_BCAST_ENABLE;
1300         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1301         writel((u32) val64, add);
1302         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1303         writel((u32) (val64 >> 32), (add + 4));
1304
1305         /* Read registers in all blocks */
1306         val64 = readq(&bar0->mac_int_mask);
1307         val64 = readq(&bar0->mc_int_mask);
1308         val64 = readq(&bar0->xgxs_int_mask);
1309
1310         /*  Set MTU */
1311         val64 = dev->mtu;
1312         writeq(vBIT(val64, 2, 14), &bar0->rmac_max_pyld_len);
1313
1314         if (nic->device_type & XFRAME_II_DEVICE) {
1315                 while (herc_act_dtx_cfg[dtx_cnt] != END_SIGN) {
1316                         SPECIAL_REG_WRITE(herc_act_dtx_cfg[dtx_cnt],
1317                                           &bar0->dtx_control, UF);
1318                         if (dtx_cnt & 0x1)
1319                                 msleep(1); /* Necessary!! */
1320                         dtx_cnt++;
1321                 }
1322         } else {
1323                 while (xena_dtx_cfg[dtx_cnt] != END_SIGN) {
1324                         SPECIAL_REG_WRITE(xena_dtx_cfg[dtx_cnt],
1325                                           &bar0->dtx_control, UF);
1326                         val64 = readq(&bar0->dtx_control);
1327                         dtx_cnt++;
1328                 }
1329         }
1330
1331         /*  Tx DMA Initialization */
1332         val64 = 0;
1333         writeq(val64, &bar0->tx_fifo_partition_0);
1334         writeq(val64, &bar0->tx_fifo_partition_1);
1335         writeq(val64, &bar0->tx_fifo_partition_2);
1336         writeq(val64, &bar0->tx_fifo_partition_3);
1337
1338
1339         for (i = 0, j = 0; i < config->tx_fifo_num; i++) {
1340                 val64 |=
1341                     vBIT(config->tx_cfg[i].fifo_len - 1, ((j * 32) + 19),
1342                          13) | vBIT(config->tx_cfg[i].fifo_priority,
1343                                     ((j * 32) + 5), 3);
1344
1345                 if (i == (config->tx_fifo_num - 1)) {
1346                         if (i % 2 == 0)
1347                                 i++;
1348                 }
1349
1350                 switch (i) {
1351                 case 1:
1352                         writeq(val64, &bar0->tx_fifo_partition_0);
1353                         val64 = 0;
1354                         j = 0;
1355                         break;
1356                 case 3:
1357                         writeq(val64, &bar0->tx_fifo_partition_1);
1358                         val64 = 0;
1359                         j = 0;
1360                         break;
1361                 case 5:
1362                         writeq(val64, &bar0->tx_fifo_partition_2);
1363                         val64 = 0;
1364                         j = 0;
1365                         break;
1366                 case 7:
1367                         writeq(val64, &bar0->tx_fifo_partition_3);
1368                         val64 = 0;
1369                         j = 0;
1370                         break;
1371                 default:
1372                         j++;
1373                         break;
1374                 }
1375         }
1376
1377         /*
1378          * Disable 4 PCCs for Xena1, 2 and 3 as per H/W bug
1379          * SXE-008 TRANSMIT DMA ARBITRATION ISSUE.
1380          */
1381         if ((nic->device_type == XFRAME_I_DEVICE) &&
1382                 (nic->pdev->revision < 4))
1383                 writeq(PCC_ENABLE_FOUR, &bar0->pcc_enable);
1384
1385         val64 = readq(&bar0->tx_fifo_partition_0);
1386         DBG_PRINT(INIT_DBG, "Fifo partition at: 0x%p is: 0x%llx\n",
1387                   &bar0->tx_fifo_partition_0, (unsigned long long) val64);
1388
1389         /*
1390          * Initialization of Tx_PA_CONFIG register to ignore packet
1391          * integrity checking.
1392          */
1393         val64 = readq(&bar0->tx_pa_cfg);
1394         val64 |= TX_PA_CFG_IGNORE_FRM_ERR | TX_PA_CFG_IGNORE_SNAP_OUI |
1395             TX_PA_CFG_IGNORE_LLC_CTRL | TX_PA_CFG_IGNORE_L2_ERR;
1396         writeq(val64, &bar0->tx_pa_cfg);
1397
1398         /* Rx DMA intialization. */
1399         val64 = 0;
1400         for (i = 0; i < config->rx_ring_num; i++) {
1401                 val64 |=
1402                     vBIT(config->rx_cfg[i].ring_priority, (5 + (i * 8)),
1403                          3);
1404         }
1405         writeq(val64, &bar0->rx_queue_priority);
1406
1407         /*
1408          * Allocating equal share of memory to all the
1409          * configured Rings.
1410          */
1411         val64 = 0;
1412         if (nic->device_type & XFRAME_II_DEVICE)
1413                 mem_size = 32;
1414         else
1415                 mem_size = 64;
1416
1417         for (i = 0; i < config->rx_ring_num; i++) {
1418                 switch (i) {
1419                 case 0:
1420                         mem_share = (mem_size / config->rx_ring_num +
1421                                      mem_size % config->rx_ring_num);
1422                         val64 |= RX_QUEUE_CFG_Q0_SZ(mem_share);
1423                         continue;
1424                 case 1:
1425                         mem_share = (mem_size / config->rx_ring_num);
1426                         val64 |= RX_QUEUE_CFG_Q1_SZ(mem_share);
1427                         continue;
1428                 case 2:
1429                         mem_share = (mem_size / config->rx_ring_num);
1430                         val64 |= RX_QUEUE_CFG_Q2_SZ(mem_share);
1431                         continue;
1432                 case 3:
1433                         mem_share = (mem_size / config->rx_ring_num);
1434                         val64 |= RX_QUEUE_CFG_Q3_SZ(mem_share);
1435                         continue;
1436                 case 4:
1437                         mem_share = (mem_size / config->rx_ring_num);
1438                         val64 |= RX_QUEUE_CFG_Q4_SZ(mem_share);
1439                         continue;
1440                 case 5:
1441                         mem_share = (mem_size / config->rx_ring_num);
1442                         val64 |= RX_QUEUE_CFG_Q5_SZ(mem_share);
1443                         continue;
1444                 case 6:
1445                         mem_share = (mem_size / config->rx_ring_num);
1446                         val64 |= RX_QUEUE_CFG_Q6_SZ(mem_share);
1447                         continue;
1448                 case 7:
1449                         mem_share = (mem_size / config->rx_ring_num);
1450                         val64 |= RX_QUEUE_CFG_Q7_SZ(mem_share);
1451                         continue;
1452                 }
1453         }
1454         writeq(val64, &bar0->rx_queue_cfg);
1455
1456         /*
1457          * Filling Tx round robin registers
1458          * as per the number of FIFOs for equal scheduling priority
1459          */
1460         switch (config->tx_fifo_num) {
1461         case 1:
1462                 val64 = 0x0;
1463                 writeq(val64, &bar0->tx_w_round_robin_0);
1464                 writeq(val64, &bar0->tx_w_round_robin_1);
1465                 writeq(val64, &bar0->tx_w_round_robin_2);
1466                 writeq(val64, &bar0->tx_w_round_robin_3);
1467                 writeq(val64, &bar0->tx_w_round_robin_4);
1468                 break;
1469         case 2:
1470                 val64 = 0x0001000100010001ULL;
1471                 writeq(val64, &bar0->tx_w_round_robin_0);
1472                 writeq(val64, &bar0->tx_w_round_robin_1);
1473                 writeq(val64, &bar0->tx_w_round_robin_2);
1474                 writeq(val64, &bar0->tx_w_round_robin_3);
1475                 val64 = 0x0001000100000000ULL;
1476                 writeq(val64, &bar0->tx_w_round_robin_4);
1477                 break;
1478         case 3:
1479                 val64 = 0x0001020001020001ULL;
1480                 writeq(val64, &bar0->tx_w_round_robin_0);
1481                 val64 = 0x0200010200010200ULL;
1482                 writeq(val64, &bar0->tx_w_round_robin_1);
1483                 val64 = 0x0102000102000102ULL;
1484                 writeq(val64, &bar0->tx_w_round_robin_2);
1485                 val64 = 0x0001020001020001ULL;
1486                 writeq(val64, &bar0->tx_w_round_robin_3);
1487                 val64 = 0x0200010200000000ULL;
1488                 writeq(val64, &bar0->tx_w_round_robin_4);
1489                 break;
1490         case 4:
1491                 val64 = 0x0001020300010203ULL;
1492                 writeq(val64, &bar0->tx_w_round_robin_0);
1493                 writeq(val64, &bar0->tx_w_round_robin_1);
1494                 writeq(val64, &bar0->tx_w_round_robin_2);
1495                 writeq(val64, &bar0->tx_w_round_robin_3);
1496                 val64 = 0x0001020300000000ULL;
1497                 writeq(val64, &bar0->tx_w_round_robin_4);
1498                 break;
1499         case 5:
1500                 val64 = 0x0001020304000102ULL;
1501                 writeq(val64, &bar0->tx_w_round_robin_0);
1502                 val64 = 0x0304000102030400ULL;
1503                 writeq(val64, &bar0->tx_w_round_robin_1);
1504                 val64 = 0x0102030400010203ULL;
1505                 writeq(val64, &bar0->tx_w_round_robin_2);
1506                 val64 = 0x0400010203040001ULL;
1507                 writeq(val64, &bar0->tx_w_round_robin_3);
1508                 val64 = 0x0203040000000000ULL;
1509                 writeq(val64, &bar0->tx_w_round_robin_4);
1510                 break;
1511         case 6:
1512                 val64 = 0x0001020304050001ULL;
1513                 writeq(val64, &bar0->tx_w_round_robin_0);
1514                 val64 = 0x0203040500010203ULL;
1515                 writeq(val64, &bar0->tx_w_round_robin_1);
1516                 val64 = 0x0405000102030405ULL;
1517                 writeq(val64, &bar0->tx_w_round_robin_2);
1518                 val64 = 0x0001020304050001ULL;
1519                 writeq(val64, &bar0->tx_w_round_robin_3);
1520                 val64 = 0x0203040500000000ULL;
1521                 writeq(val64, &bar0->tx_w_round_robin_4);
1522                 break;
1523         case 7:
1524                 val64 = 0x0001020304050600ULL;
1525                 writeq(val64, &bar0->tx_w_round_robin_0);
1526                 val64 = 0x0102030405060001ULL;
1527                 writeq(val64, &bar0->tx_w_round_robin_1);
1528                 val64 = 0x0203040506000102ULL;
1529                 writeq(val64, &bar0->tx_w_round_robin_2);
1530                 val64 = 0x0304050600010203ULL;
1531                 writeq(val64, &bar0->tx_w_round_robin_3);
1532                 val64 = 0x0405060000000000ULL;
1533                 writeq(val64, &bar0->tx_w_round_robin_4);
1534                 break;
1535         case 8:
1536                 val64 = 0x0001020304050607ULL;
1537                 writeq(val64, &bar0->tx_w_round_robin_0);
1538                 writeq(val64, &bar0->tx_w_round_robin_1);
1539                 writeq(val64, &bar0->tx_w_round_robin_2);
1540                 writeq(val64, &bar0->tx_w_round_robin_3);
1541                 val64 = 0x0001020300000000ULL;
1542                 writeq(val64, &bar0->tx_w_round_robin_4);
1543                 break;
1544         }
1545
1546         /* Enable all configured Tx FIFO partitions */
1547         val64 = readq(&bar0->tx_fifo_partition_0);
1548         val64 |= (TX_FIFO_PARTITION_EN);
1549         writeq(val64, &bar0->tx_fifo_partition_0);
1550
1551         /* Filling the Rx round robin registers as per the
1552          * number of Rings and steering based on QoS with
1553          * equal priority.
1554          */
1555         switch (config->rx_ring_num) {
1556         case 1:
1557                 val64 = 0x0;
1558                 writeq(val64, &bar0->rx_w_round_robin_0);
1559                 writeq(val64, &bar0->rx_w_round_robin_1);
1560                 writeq(val64, &bar0->rx_w_round_robin_2);
1561                 writeq(val64, &bar0->rx_w_round_robin_3);
1562                 writeq(val64, &bar0->rx_w_round_robin_4);
1563
1564                 val64 = 0x8080808080808080ULL;
1565                 writeq(val64, &bar0->rts_qos_steering);
1566                 break;
1567         case 2:
1568                 val64 = 0x0001000100010001ULL;
1569                 writeq(val64, &bar0->rx_w_round_robin_0);
1570                 writeq(val64, &bar0->rx_w_round_robin_1);
1571                 writeq(val64, &bar0->rx_w_round_robin_2);
1572                 writeq(val64, &bar0->rx_w_round_robin_3);
1573                 val64 = 0x0001000100000000ULL;
1574                 writeq(val64, &bar0->rx_w_round_robin_4);
1575
1576                 val64 = 0x8080808040404040ULL;
1577                 writeq(val64, &bar0->rts_qos_steering);
1578                 break;
1579         case 3:
1580                 val64 = 0x0001020001020001ULL;
1581                 writeq(val64, &bar0->rx_w_round_robin_0);
1582                 val64 = 0x0200010200010200ULL;
1583                 writeq(val64, &bar0->rx_w_round_robin_1);
1584                 val64 = 0x0102000102000102ULL;
1585                 writeq(val64, &bar0->rx_w_round_robin_2);
1586                 val64 = 0x0001020001020001ULL;
1587                 writeq(val64, &bar0->rx_w_round_robin_3);
1588                 val64 = 0x0200010200000000ULL;
1589                 writeq(val64, &bar0->rx_w_round_robin_4);
1590
1591                 val64 = 0x8080804040402020ULL;
1592                 writeq(val64, &bar0->rts_qos_steering);
1593                 break;
1594         case 4:
1595                 val64 = 0x0001020300010203ULL;
1596                 writeq(val64, &bar0->rx_w_round_robin_0);
1597                 writeq(val64, &bar0->rx_w_round_robin_1);
1598                 writeq(val64, &bar0->rx_w_round_robin_2);
1599                 writeq(val64, &bar0->rx_w_round_robin_3);
1600                 val64 = 0x0001020300000000ULL;
1601                 writeq(val64, &bar0->rx_w_round_robin_4);
1602
1603                 val64 = 0x8080404020201010ULL;
1604                 writeq(val64, &bar0->rts_qos_steering);
1605                 break;
1606         case 5:
1607                 val64 = 0x0001020304000102ULL;
1608                 writeq(val64, &bar0->rx_w_round_robin_0);
1609                 val64 = 0x0304000102030400ULL;
1610                 writeq(val64, &bar0->rx_w_round_robin_1);
1611                 val64 = 0x0102030400010203ULL;
1612                 writeq(val64, &bar0->rx_w_round_robin_2);
1613                 val64 = 0x0400010203040001ULL;
1614                 writeq(val64, &bar0->rx_w_round_robin_3);
1615                 val64 = 0x0203040000000000ULL;
1616                 writeq(val64, &bar0->rx_w_round_robin_4);
1617
1618                 val64 = 0x8080404020201008ULL;
1619                 writeq(val64, &bar0->rts_qos_steering);
1620                 break;
1621         case 6:
1622                 val64 = 0x0001020304050001ULL;
1623                 writeq(val64, &bar0->rx_w_round_robin_0);
1624                 val64 = 0x0203040500010203ULL;
1625                 writeq(val64, &bar0->rx_w_round_robin_1);
1626                 val64 = 0x0405000102030405ULL;
1627                 writeq(val64, &bar0->rx_w_round_robin_2);
1628                 val64 = 0x0001020304050001ULL;
1629                 writeq(val64, &bar0->rx_w_round_robin_3);
1630                 val64 = 0x0203040500000000ULL;
1631                 writeq(val64, &bar0->rx_w_round_robin_4);
1632
1633                 val64 = 0x8080404020100804ULL;
1634                 writeq(val64, &bar0->rts_qos_steering);
1635                 break;
1636         case 7:
1637                 val64 = 0x0001020304050600ULL;
1638                 writeq(val64, &bar0->rx_w_round_robin_0);
1639                 val64 = 0x0102030405060001ULL;
1640                 writeq(val64, &bar0->rx_w_round_robin_1);
1641                 val64 = 0x0203040506000102ULL;
1642                 writeq(val64, &bar0->rx_w_round_robin_2);
1643                 val64 = 0x0304050600010203ULL;
1644                 writeq(val64, &bar0->rx_w_round_robin_3);
1645                 val64 = 0x0405060000000000ULL;
1646                 writeq(val64, &bar0->rx_w_round_robin_4);
1647
1648                 val64 = 0x8080402010080402ULL;
1649                 writeq(val64, &bar0->rts_qos_steering);
1650                 break;
1651         case 8:
1652                 val64 = 0x0001020304050607ULL;
1653                 writeq(val64, &bar0->rx_w_round_robin_0);
1654                 writeq(val64, &bar0->rx_w_round_robin_1);
1655                 writeq(val64, &bar0->rx_w_round_robin_2);
1656                 writeq(val64, &bar0->rx_w_round_robin_3);
1657                 val64 = 0x0001020300000000ULL;
1658                 writeq(val64, &bar0->rx_w_round_robin_4);
1659
1660                 val64 = 0x8040201008040201ULL;
1661                 writeq(val64, &bar0->rts_qos_steering);
1662                 break;
1663         }
1664
1665         /* UDP Fix */
1666         val64 = 0;
1667         for (i = 0; i < 8; i++)
1668                 writeq(val64, &bar0->rts_frm_len_n[i]);
1669
1670         /* Set the default rts frame length for the rings configured */
1671         val64 = MAC_RTS_FRM_LEN_SET(dev->mtu+22);
1672         for (i = 0 ; i < config->rx_ring_num ; i++)
1673                 writeq(val64, &bar0->rts_frm_len_n[i]);
1674
1675         /* Set the frame length for the configured rings
1676          * desired by the user
1677          */
1678         for (i = 0; i < config->rx_ring_num; i++) {
1679                 /* If rts_frm_len[i] == 0 then it is assumed that user not
1680                  * specified frame length steering.
1681                  * If the user provides the frame length then program
1682                  * the rts_frm_len register for those values or else
1683                  * leave it as it is.
1684                  */
1685                 if (rts_frm_len[i] != 0) {
1686                         writeq(MAC_RTS_FRM_LEN_SET(rts_frm_len[i]),
1687                                 &bar0->rts_frm_len_n[i]);
1688                 }
1689         }
1690
1691         /* Disable differentiated services steering logic */
1692         for (i = 0; i < 64; i++) {
1693                 if (rts_ds_steer(nic, i, 0) == FAILURE) {
1694                         DBG_PRINT(ERR_DBG, "%s: failed rts ds steering",
1695                                 dev->name);
1696                         DBG_PRINT(ERR_DBG, "set on codepoint %d\n", i);
1697                         return -ENODEV;
1698                 }
1699         }
1700
1701         /* Program statistics memory */
1702         writeq(mac_control->stats_mem_phy, &bar0->stat_addr);
1703
1704         if (nic->device_type == XFRAME_II_DEVICE) {
1705                 val64 = STAT_BC(0x320);
1706                 writeq(val64, &bar0->stat_byte_cnt);
1707         }
1708
1709         /*
1710          * Initializing the sampling rate for the device to calculate the
1711          * bandwidth utilization.
1712          */
1713         val64 = MAC_TX_LINK_UTIL_VAL(tmac_util_period) |
1714             MAC_RX_LINK_UTIL_VAL(rmac_util_period);
1715         writeq(val64, &bar0->mac_link_util);
1716
1717         /*
1718          * Initializing the Transmit and Receive Traffic Interrupt
1719          * Scheme.
1720          */
1721
1722         /* Initialize TTI */
1723         if (SUCCESS != init_tti(nic, nic->last_link_state))
1724                 return -ENODEV;
1725
1726         /* RTI Initialization */
1727         if (nic->device_type == XFRAME_II_DEVICE) {
1728                 /*
1729                  * Programmed to generate Apprx 500 Intrs per
1730                  * second
1731                  */
1732                 int count = (nic->config.bus_speed * 125)/4;
1733                 val64 = RTI_DATA1_MEM_RX_TIMER_VAL(count);
1734         } else
1735                 val64 = RTI_DATA1_MEM_RX_TIMER_VAL(0xFFF);
1736         val64 |= RTI_DATA1_MEM_RX_URNG_A(0xA) |
1737                  RTI_DATA1_MEM_RX_URNG_B(0x10) |
1738                  RTI_DATA1_MEM_RX_URNG_C(0x30) | RTI_DATA1_MEM_RX_TIMER_AC_EN;
1739
1740         writeq(val64, &bar0->rti_data1_mem);
1741
1742         val64 = RTI_DATA2_MEM_RX_UFC_A(0x1) |
1743                 RTI_DATA2_MEM_RX_UFC_B(0x2) ;
1744         if (nic->config.intr_type == MSI_X)
1745             val64 |= (RTI_DATA2_MEM_RX_UFC_C(0x20) | \
1746                         RTI_DATA2_MEM_RX_UFC_D(0x40));
1747         else
1748             val64 |= (RTI_DATA2_MEM_RX_UFC_C(0x40) | \
1749                         RTI_DATA2_MEM_RX_UFC_D(0x80));
1750         writeq(val64, &bar0->rti_data2_mem);
1751
1752         for (i = 0; i < config->rx_ring_num; i++) {
1753                 val64 = RTI_CMD_MEM_WE | RTI_CMD_MEM_STROBE_NEW_CMD
1754                                 | RTI_CMD_MEM_OFFSET(i);
1755                 writeq(val64, &bar0->rti_command_mem);
1756
1757                 /*
1758                  * Once the operation completes, the Strobe bit of the
1759                  * command register will be reset. We poll for this
1760                  * particular condition. We wait for a maximum of 500ms
1761                  * for the operation to complete, if it's not complete
1762                  * by then we return error.
1763                  */
1764                 time = 0;
1765                 while (TRUE) {
1766                         val64 = readq(&bar0->rti_command_mem);
1767                         if (!(val64 & RTI_CMD_MEM_STROBE_NEW_CMD))
1768                                 break;
1769
1770                         if (time > 10) {
1771                                 DBG_PRINT(ERR_DBG, "%s: RTI init Failed\n",
1772                                           dev->name);
1773                                 return -ENODEV;
1774                         }
1775                         time++;
1776                         msleep(50);
1777                 }
1778         }
1779
1780         /*
1781          * Initializing proper values as Pause threshold into all
1782          * the 8 Queues on Rx side.
1783          */
1784         writeq(0xffbbffbbffbbffbbULL, &bar0->mc_pause_thresh_q0q3);
1785         writeq(0xffbbffbbffbbffbbULL, &bar0->mc_pause_thresh_q4q7);
1786
1787         /* Disable RMAC PAD STRIPPING */
1788         add = &bar0->mac_cfg;
1789         val64 = readq(&bar0->mac_cfg);
1790         val64 &= ~(MAC_CFG_RMAC_STRIP_PAD);
1791         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1792         writel((u32) (val64), add);
1793         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1794         writel((u32) (val64 >> 32), (add + 4));
1795         val64 = readq(&bar0->mac_cfg);
1796
1797         /* Enable FCS stripping by adapter */
1798         add = &bar0->mac_cfg;
1799         val64 = readq(&bar0->mac_cfg);
1800         val64 |= MAC_CFG_RMAC_STRIP_FCS;
1801         if (nic->device_type == XFRAME_II_DEVICE)
1802                 writeq(val64, &bar0->mac_cfg);
1803         else {
1804                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1805                 writel((u32) (val64), add);
1806                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1807                 writel((u32) (val64 >> 32), (add + 4));
1808         }
1809
1810         /*
1811          * Set the time value to be inserted in the pause frame
1812          * generated by xena.
1813          */
1814         val64 = readq(&bar0->rmac_pause_cfg);
1815         val64 &= ~(RMAC_PAUSE_HG_PTIME(0xffff));
1816         val64 |= RMAC_PAUSE_HG_PTIME(nic->mac_control.rmac_pause_time);
1817         writeq(val64, &bar0->rmac_pause_cfg);
1818
1819         /*
1820          * Set the Threshold Limit for Generating the pause frame
1821          * If the amount of data in any Queue exceeds ratio of
1822          * (mac_control.mc_pause_threshold_q0q3 or q4q7)/256
1823          * pause frame is generated
1824          */
1825         val64 = 0;
1826         for (i = 0; i < 4; i++) {
1827                 val64 |=
1828                     (((u64) 0xFF00 | nic->mac_control.
1829                       mc_pause_threshold_q0q3)
1830                      << (i * 2 * 8));
1831         }
1832         writeq(val64, &bar0->mc_pause_thresh_q0q3);
1833
1834         val64 = 0;
1835         for (i = 0; i < 4; i++) {
1836                 val64 |=
1837                     (((u64) 0xFF00 | nic->mac_control.
1838                       mc_pause_threshold_q4q7)
1839                      << (i * 2 * 8));
1840         }
1841         writeq(val64, &bar0->mc_pause_thresh_q4q7);
1842
1843         /*
1844          * TxDMA will stop Read request if the number of read split has
1845          * exceeded the limit pointed by shared_splits
1846          */
1847         val64 = readq(&bar0->pic_control);
1848         val64 |= PIC_CNTL_SHARED_SPLITS(shared_splits);
1849         writeq(val64, &bar0->pic_control);
1850
1851         if (nic->config.bus_speed == 266) {
1852                 writeq(TXREQTO_VAL(0x7f) | TXREQTO_EN, &bar0->txreqtimeout);
1853                 writeq(0x0, &bar0->read_retry_delay);
1854                 writeq(0x0, &bar0->write_retry_delay);
1855         }
1856
1857         /*
1858          * Programming the Herc to split every write transaction
1859          * that does not start on an ADB to reduce disconnects.
1860          */
1861         if (nic->device_type == XFRAME_II_DEVICE) {
1862                 val64 = FAULT_BEHAVIOUR | EXT_REQ_EN |
1863                         MISC_LINK_STABILITY_PRD(3);
1864                 writeq(val64, &bar0->misc_control);
1865                 val64 = readq(&bar0->pic_control2);
1866                 val64 &= ~(s2BIT(13)|s2BIT(14)|s2BIT(15));
1867                 writeq(val64, &bar0->pic_control2);
1868         }
1869         if (strstr(nic->product_name, "CX4")) {
1870                 val64 = TMAC_AVG_IPG(0x17);
1871                 writeq(val64, &bar0->tmac_avg_ipg);
1872         }
1873
1874         return SUCCESS;
1875 }
1876 #define LINK_UP_DOWN_INTERRUPT          1
1877 #define MAC_RMAC_ERR_TIMER              2
1878
1879 static int s2io_link_fault_indication(struct s2io_nic *nic)
1880 {
1881         if (nic->device_type == XFRAME_II_DEVICE)
1882                 return LINK_UP_DOWN_INTERRUPT;
1883         else
1884                 return MAC_RMAC_ERR_TIMER;
1885 }
1886
1887 /**
1888  *  do_s2io_write_bits -  update alarm bits in alarm register
1889  *  @value: alarm bits
1890  *  @flag: interrupt status
1891  *  @addr: address value
1892  *  Description: update alarm bits in alarm register
1893  *  Return Value:
1894  *  NONE.
1895  */
1896 static void do_s2io_write_bits(u64 value, int flag, void __iomem *addr)
1897 {
1898         u64 temp64;
1899
1900         temp64 = readq(addr);
1901
1902         if(flag == ENABLE_INTRS)
1903                 temp64 &= ~((u64) value);
1904         else
1905                 temp64 |= ((u64) value);
1906         writeq(temp64, addr);
1907 }
1908
1909 static void en_dis_err_alarms(struct s2io_nic *nic, u16 mask, int flag)
1910 {
1911         struct XENA_dev_config __iomem *bar0 = nic->bar0;
1912         register u64 gen_int_mask = 0;
1913         u64 interruptible;
1914
1915         writeq(DISABLE_ALL_INTRS, &bar0->general_int_mask);
1916         if (mask & TX_DMA_INTR) {
1917
1918                 gen_int_mask |= TXDMA_INT_M;
1919
1920                 do_s2io_write_bits(TXDMA_TDA_INT | TXDMA_PFC_INT |
1921                                 TXDMA_PCC_INT | TXDMA_TTI_INT |
1922                                 TXDMA_LSO_INT | TXDMA_TPA_INT |
1923                                 TXDMA_SM_INT, flag, &bar0->txdma_int_mask);
1924
1925                 do_s2io_write_bits(PFC_ECC_DB_ERR | PFC_SM_ERR_ALARM |
1926                                 PFC_MISC_0_ERR | PFC_MISC_1_ERR |
1927                                 PFC_PCIX_ERR | PFC_ECC_SG_ERR, flag,
1928                                 &bar0->pfc_err_mask);
1929
1930                 do_s2io_write_bits(TDA_Fn_ECC_DB_ERR | TDA_SM0_ERR_ALARM |
1931                                 TDA_SM1_ERR_ALARM | TDA_Fn_ECC_SG_ERR |
1932                                 TDA_PCIX_ERR, flag, &bar0->tda_err_mask);
1933
1934                 do_s2io_write_bits(PCC_FB_ECC_DB_ERR | PCC_TXB_ECC_DB_ERR |
1935                                 PCC_SM_ERR_ALARM | PCC_WR_ERR_ALARM |
1936                                 PCC_N_SERR | PCC_6_COF_OV_ERR |
1937                                 PCC_7_COF_OV_ERR | PCC_6_LSO_OV_ERR |
1938                                 PCC_7_LSO_OV_ERR | PCC_FB_ECC_SG_ERR |
1939                                 PCC_TXB_ECC_SG_ERR, flag, &bar0->pcc_err_mask);
1940
1941                 do_s2io_write_bits(TTI_SM_ERR_ALARM | TTI_ECC_SG_ERR |
1942                                 TTI_ECC_DB_ERR, flag, &bar0->tti_err_mask);
1943
1944                 do_s2io_write_bits(LSO6_ABORT | LSO7_ABORT |
1945                                 LSO6_SM_ERR_ALARM | LSO7_SM_ERR_ALARM |
1946                                 LSO6_SEND_OFLOW | LSO7_SEND_OFLOW,
1947                                 flag, &bar0->lso_err_mask);
1948
1949                 do_s2io_write_bits(TPA_SM_ERR_ALARM | TPA_TX_FRM_DROP,
1950                                 flag, &bar0->tpa_err_mask);
1951
1952                 do_s2io_write_bits(SM_SM_ERR_ALARM, flag, &bar0->sm_err_mask);
1953
1954         }
1955
1956         if (mask & TX_MAC_INTR) {
1957                 gen_int_mask |= TXMAC_INT_M;
1958                 do_s2io_write_bits(MAC_INT_STATUS_TMAC_INT, flag,
1959                                 &bar0->mac_int_mask);
1960                 do_s2io_write_bits(TMAC_TX_BUF_OVRN | TMAC_TX_SM_ERR |
1961                                 TMAC_ECC_SG_ERR | TMAC_ECC_DB_ERR |
1962                                 TMAC_DESC_ECC_SG_ERR | TMAC_DESC_ECC_DB_ERR,
1963                                 flag, &bar0->mac_tmac_err_mask);
1964         }
1965
1966         if (mask & TX_XGXS_INTR) {
1967                 gen_int_mask |= TXXGXS_INT_M;
1968                 do_s2io_write_bits(XGXS_INT_STATUS_TXGXS, flag,
1969                                 &bar0->xgxs_int_mask);
1970                 do_s2io_write_bits(TXGXS_ESTORE_UFLOW | TXGXS_TX_SM_ERR |
1971                                 TXGXS_ECC_SG_ERR | TXGXS_ECC_DB_ERR,
1972                                 flag, &bar0->xgxs_txgxs_err_mask);
1973         }
1974
1975         if (mask & RX_DMA_INTR) {
1976                 gen_int_mask |= RXDMA_INT_M;
1977                 do_s2io_write_bits(RXDMA_INT_RC_INT_M | RXDMA_INT_RPA_INT_M |
1978                                 RXDMA_INT_RDA_INT_M | RXDMA_INT_RTI_INT_M,
1979                                 flag, &bar0->rxdma_int_mask);
1980                 do_s2io_write_bits(RC_PRCn_ECC_DB_ERR | RC_FTC_ECC_DB_ERR |
1981                                 RC_PRCn_SM_ERR_ALARM | RC_FTC_SM_ERR_ALARM |
1982                                 RC_PRCn_ECC_SG_ERR | RC_FTC_ECC_SG_ERR |
1983                                 RC_RDA_FAIL_WR_Rn, flag, &bar0->rc_err_mask);
1984                 do_s2io_write_bits(PRC_PCI_AB_RD_Rn | PRC_PCI_AB_WR_Rn |
1985                                 PRC_PCI_AB_F_WR_Rn | PRC_PCI_DP_RD_Rn |
1986                                 PRC_PCI_DP_WR_Rn | PRC_PCI_DP_F_WR_Rn, flag,
1987                                 &bar0->prc_pcix_err_mask);
1988                 do_s2io_write_bits(RPA_SM_ERR_ALARM | RPA_CREDIT_ERR |
1989                                 RPA_ECC_SG_ERR | RPA_ECC_DB_ERR, flag,
1990                                 &bar0->rpa_err_mask);
1991                 do_s2io_write_bits(RDA_RXDn_ECC_DB_ERR | RDA_FRM_ECC_DB_N_AERR |
1992                                 RDA_SM1_ERR_ALARM | RDA_SM0_ERR_ALARM |
1993                                 RDA_RXD_ECC_DB_SERR | RDA_RXDn_ECC_SG_ERR |
1994                                 RDA_FRM_ECC_SG_ERR | RDA_MISC_ERR|RDA_PCIX_ERR,
1995                                 flag, &bar0->rda_err_mask);
1996                 do_s2io_write_bits(RTI_SM_ERR_ALARM |
1997                                 RTI_ECC_SG_ERR | RTI_ECC_DB_ERR,
1998                                 flag, &bar0->rti_err_mask);
1999         }
2000
2001         if (mask & RX_MAC_INTR) {
2002                 gen_int_mask |= RXMAC_INT_M;
2003                 do_s2io_write_bits(MAC_INT_STATUS_RMAC_INT, flag,
2004                                 &bar0->mac_int_mask);
2005                 interruptible = RMAC_RX_BUFF_OVRN | RMAC_RX_SM_ERR |
2006                                 RMAC_UNUSED_INT | RMAC_SINGLE_ECC_ERR |
2007                                 RMAC_DOUBLE_ECC_ERR;
2008                 if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER)
2009                         interruptible |= RMAC_LINK_STATE_CHANGE_INT;
2010                 do_s2io_write_bits(interruptible,
2011                                 flag, &bar0->mac_rmac_err_mask);
2012         }
2013
2014         if (mask & RX_XGXS_INTR)
2015         {
2016                 gen_int_mask |= RXXGXS_INT_M;
2017                 do_s2io_write_bits(XGXS_INT_STATUS_RXGXS, flag,
2018                                 &bar0->xgxs_int_mask);
2019                 do_s2io_write_bits(RXGXS_ESTORE_OFLOW | RXGXS_RX_SM_ERR, flag,
2020                                 &bar0->xgxs_rxgxs_err_mask);
2021         }
2022
2023         if (mask & MC_INTR) {
2024                 gen_int_mask |= MC_INT_M;
2025                 do_s2io_write_bits(MC_INT_MASK_MC_INT, flag, &bar0->mc_int_mask);
2026                 do_s2io_write_bits(MC_ERR_REG_SM_ERR | MC_ERR_REG_ECC_ALL_SNG |
2027                                 MC_ERR_REG_ECC_ALL_DBL | PLL_LOCK_N, flag,
2028                                 &bar0->mc_err_mask);
2029         }
2030         nic->general_int_mask = gen_int_mask;
2031
2032         /* Remove this line when alarm interrupts are enabled */
2033         nic->general_int_mask = 0;
2034 }
2035 /**
2036  *  en_dis_able_nic_intrs - Enable or Disable the interrupts
2037  *  @nic: device private variable,
2038  *  @mask: A mask indicating which Intr block must be modified and,
2039  *  @flag: A flag indicating whether to enable or disable the Intrs.
2040  *  Description: This function will either disable or enable the interrupts
2041  *  depending on the flag argument. The mask argument can be used to
2042  *  enable/disable any Intr block.
2043  *  Return Value: NONE.
2044  */
2045
2046 static void en_dis_able_nic_intrs(struct s2io_nic *nic, u16 mask, int flag)
2047 {
2048         struct XENA_dev_config __iomem *bar0 = nic->bar0;
2049         register u64 temp64 = 0, intr_mask = 0;
2050
2051         intr_mask = nic->general_int_mask;
2052
2053         /*  Top level interrupt classification */
2054         /*  PIC Interrupts */
2055         if (mask & TX_PIC_INTR) {
2056                 /*  Enable PIC Intrs in the general intr mask register */
2057                 intr_mask |= TXPIC_INT_M;
2058                 if (flag == ENABLE_INTRS) {
2059                         /*
2060                          * If Hercules adapter enable GPIO otherwise
2061                          * disable all PCIX, Flash, MDIO, IIC and GPIO
2062                          * interrupts for now.
2063                          * TODO
2064                          */
2065                         if (s2io_link_fault_indication(nic) ==
2066                                         LINK_UP_DOWN_INTERRUPT ) {
2067                                 do_s2io_write_bits(PIC_INT_GPIO, flag,
2068                                                 &bar0->pic_int_mask);
2069                                 do_s2io_write_bits(GPIO_INT_MASK_LINK_UP, flag,
2070                                                 &bar0->gpio_int_mask);
2071                         } else
2072                                 writeq(DISABLE_ALL_INTRS, &bar0->pic_int_mask);
2073                 } else if (flag == DISABLE_INTRS) {
2074                         /*
2075                          * Disable PIC Intrs in the general
2076                          * intr mask register
2077                          */
2078                         writeq(DISABLE_ALL_INTRS, &bar0->pic_int_mask);
2079                 }
2080         }
2081
2082         /*  Tx traffic interrupts */
2083         if (mask & TX_TRAFFIC_INTR) {
2084                 intr_mask |= TXTRAFFIC_INT_M;
2085                 if (flag == ENABLE_INTRS) {
2086                         /*
2087                          * Enable all the Tx side interrupts
2088                          * writing 0 Enables all 64 TX interrupt levels
2089                          */
2090                         writeq(0x0, &bar0->tx_traffic_mask);
2091                 } else if (flag == DISABLE_INTRS) {
2092                         /*
2093                          * Disable Tx Traffic Intrs in the general intr mask
2094                          * register.
2095                          */
2096                         writeq(DISABLE_ALL_INTRS, &bar0->tx_traffic_mask);
2097                 }
2098         }
2099
2100         /*  Rx traffic interrupts */
2101         if (mask & RX_TRAFFIC_INTR) {
2102                 intr_mask |= RXTRAFFIC_INT_M;
2103                 if (flag == ENABLE_INTRS) {
2104                         /* writing 0 Enables all 8 RX interrupt levels */
2105                         writeq(0x0, &bar0->rx_traffic_mask);
2106                 } else if (flag == DISABLE_INTRS) {
2107                         /*
2108                          * Disable Rx Traffic Intrs in the general intr mask
2109                          * register.
2110                          */
2111                         writeq(DISABLE_ALL_INTRS, &bar0->rx_traffic_mask);
2112                 }
2113         }
2114
2115         temp64 = readq(&bar0->general_int_mask);
2116         if (flag == ENABLE_INTRS)
2117                 temp64 &= ~((u64) intr_mask);
2118         else
2119                 temp64 = DISABLE_ALL_INTRS;
2120         writeq(temp64, &bar0->general_int_mask);
2121
2122         nic->general_int_mask = readq(&bar0->general_int_mask);
2123 }
2124
2125 /**
2126  *  verify_pcc_quiescent- Checks for PCC quiescent state
2127  *  Return: 1 If PCC is quiescence
2128  *          0 If PCC is not quiescence
2129  */
2130 static int verify_pcc_quiescent(struct s2io_nic *sp, int flag)
2131 {
2132         int ret = 0, herc;
2133         struct XENA_dev_config __iomem *bar0 = sp->bar0;
2134         u64 val64 = readq(&bar0->adapter_status);
2135
2136         herc = (sp->device_type == XFRAME_II_DEVICE);
2137
2138         if (flag == FALSE) {
2139                 if ((!herc && (sp->pdev->revision >= 4)) || herc) {
2140                         if (!(val64 & ADAPTER_STATUS_RMAC_PCC_IDLE))
2141                                 ret = 1;
2142                 } else {
2143                         if (!(val64 & ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE))
2144                                 ret = 1;
2145                 }
2146         } else {
2147                 if ((!herc && (sp->pdev->revision >= 4)) || herc) {
2148                         if (((val64 & ADAPTER_STATUS_RMAC_PCC_IDLE) ==
2149                              ADAPTER_STATUS_RMAC_PCC_IDLE))
2150                                 ret = 1;
2151                 } else {
2152                         if (((val64 & ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE) ==
2153                              ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE))
2154                                 ret = 1;
2155                 }
2156         }
2157
2158         return ret;
2159 }
2160 /**
2161  *  verify_xena_quiescence - Checks whether the H/W is ready
2162  *  Description: Returns whether the H/W is ready to go or not. Depending
2163  *  on whether adapter enable bit was written or not the comparison
2164  *  differs and the calling function passes the input argument flag to
2165  *  indicate this.
2166  *  Return: 1 If xena is quiescence
2167  *          0 If Xena is not quiescence
2168  */
2169
2170 static int verify_xena_quiescence(struct s2io_nic *sp)
2171 {
2172         int  mode;
2173         struct XENA_dev_config __iomem *bar0 = sp->bar0;
2174         u64 val64 = readq(&bar0->adapter_status);
2175         mode = s2io_verify_pci_mode(sp);
2176
2177         if (!(val64 & ADAPTER_STATUS_TDMA_READY)) {
2178                 DBG_PRINT(ERR_DBG, "%s", "TDMA is not ready!");
2179                 return 0;
2180         }
2181         if (!(val64 & ADAPTER_STATUS_RDMA_READY)) {
2182         DBG_PRINT(ERR_DBG, "%s", "RDMA is not ready!");
2183                 return 0;
2184         }
2185         if (!(val64 & ADAPTER_STATUS_PFC_READY)) {
2186                 DBG_PRINT(ERR_DBG, "%s", "PFC is not ready!");
2187                 return 0;
2188         }
2189         if (!(val64 & ADAPTER_STATUS_TMAC_BUF_EMPTY)) {
2190                 DBG_PRINT(ERR_DBG, "%s", "TMAC BUF is not empty!");
2191                 return 0;
2192         }
2193         if (!(val64 & ADAPTER_STATUS_PIC_QUIESCENT)) {
2194                 DBG_PRINT(ERR_DBG, "%s", "PIC is not QUIESCENT!");
2195                 return 0;
2196         }
2197         if (!(val64 & ADAPTER_STATUS_MC_DRAM_READY)) {
2198                 DBG_PRINT(ERR_DBG, "%s", "MC_DRAM is not ready!");
2199                 return 0;
2200         }
2201         if (!(val64 & ADAPTER_STATUS_MC_QUEUES_READY)) {
2202                 DBG_PRINT(ERR_DBG, "%s", "MC_QUEUES is not ready!");
2203                 return 0;
2204         }
2205         if (!(val64 & ADAPTER_STATUS_M_PLL_LOCK)) {
2206                 DBG_PRINT(ERR_DBG, "%s", "M_PLL is not locked!");
2207                 return 0;
2208         }
2209
2210         /*
2211          * In PCI 33 mode, the P_PLL is not used, and therefore,
2212          * the the P_PLL_LOCK bit in the adapter_status register will
2213          * not be asserted.
2214          */
2215         if (!(val64 & ADAPTER_STATUS_P_PLL_LOCK) &&
2216                 sp->device_type == XFRAME_II_DEVICE && mode !=
2217                 PCI_MODE_PCI_33) {
2218                 DBG_PRINT(ERR_DBG, "%s", "P_PLL is not locked!");
2219                 return 0;
2220         }
2221         if (!((val64 & ADAPTER_STATUS_RC_PRC_QUIESCENT) ==
2222                         ADAPTER_STATUS_RC_PRC_QUIESCENT)) {
2223                 DBG_PRINT(ERR_DBG, "%s", "RC_PRC is not QUIESCENT!");
2224                 return 0;
2225         }
2226         return 1;
2227 }
2228
2229 /**
2230  * fix_mac_address -  Fix for Mac addr problem on Alpha platforms
2231  * @sp: Pointer to device specifc structure
2232  * Description :
2233  * New procedure to clear mac address reading  problems on Alpha platforms
2234  *
2235  */
2236
2237 static void fix_mac_address(struct s2io_nic * sp)
2238 {
2239         struct XENA_dev_config __iomem *bar0 = sp->bar0;
2240         u64 val64;
2241         int i = 0;
2242
2243         while (fix_mac[i] != END_SIGN) {
2244                 writeq(fix_mac[i++], &bar0->gpio_control);
2245                 udelay(10);
2246                 val64 = readq(&bar0->gpio_control);
2247         }
2248 }
2249
2250 /**
2251  *  start_nic - Turns the device on
2252  *  @nic : device private variable.
2253  *  Description:
2254  *  This function actually turns the device on. Before this  function is
2255  *  called,all Registers are configured from their reset states
2256  *  and shared memory is allocated but the NIC is still quiescent. On
2257  *  calling this function, the device interrupts are cleared and the NIC is
2258  *  literally switched on by writing into the adapter control register.
2259  *  Return Value:
2260  *  SUCCESS on success and -1 on failure.
2261  */
2262
2263 static int start_nic(struct s2io_nic *nic)
2264 {
2265         struct XENA_dev_config __iomem *bar0 = nic->bar0;
2266         struct net_device *dev = nic->dev;
2267         register u64 val64 = 0;
2268         u16 subid, i;
2269         struct mac_info *mac_control;
2270         struct config_param *config;
2271
2272         mac_control = &nic->mac_control;
2273         config = &nic->config;
2274
2275         /*  PRC Initialization and configuration */
2276         for (i = 0; i < config->rx_ring_num; i++) {
2277                 writeq((u64) mac_control->rings[i].rx_blocks[0].block_dma_addr,
2278                        &bar0->prc_rxd0_n[i]);
2279
2280                 val64 = readq(&bar0->prc_ctrl_n[i]);
2281                 if (nic->rxd_mode == RXD_MODE_1)
2282                         val64 |= PRC_CTRL_RC_ENABLED;
2283                 else
2284                         val64 |= PRC_CTRL_RC_ENABLED | PRC_CTRL_RING_MODE_3;
2285                 if (nic->device_type == XFRAME_II_DEVICE)
2286                         val64 |= PRC_CTRL_GROUP_READS;
2287                 val64 &= ~PRC_CTRL_RXD_BACKOFF_INTERVAL(0xFFFFFF);
2288                 val64 |= PRC_CTRL_RXD_BACKOFF_INTERVAL(0x1000);
2289                 writeq(val64, &bar0->prc_ctrl_n[i]);
2290         }
2291
2292         if (nic->rxd_mode == RXD_MODE_3B) {
2293                 /* Enabling 2 buffer mode by writing into Rx_pa_cfg reg. */
2294                 val64 = readq(&bar0->rx_pa_cfg);
2295                 val64 |= RX_PA_CFG_IGNORE_L2_ERR;
2296                 writeq(val64, &bar0->rx_pa_cfg);
2297         }
2298
2299         if (vlan_tag_strip == 0) {
2300                 val64 = readq(&bar0->rx_pa_cfg);
2301                 val64 &= ~RX_PA_CFG_STRIP_VLAN_TAG;
2302                 writeq(val64, &bar0->rx_pa_cfg);
2303                 nic->vlan_strip_flag = 0;
2304         }
2305
2306         /*
2307          * Enabling MC-RLDRAM. After enabling the device, we timeout
2308          * for around 100ms, which is approximately the time required
2309          * for the device to be ready for operation.
2310          */
2311         val64 = readq(&bar0->mc_rldram_mrs);
2312         val64 |= MC_RLDRAM_QUEUE_SIZE_ENABLE | MC_RLDRAM_MRS_ENABLE;
2313         SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_mrs, UF);
2314         val64 = readq(&bar0->mc_rldram_mrs);
2315
2316         msleep(100);    /* Delay by around 100 ms. */
2317
2318         /* Enabling ECC Protection. */
2319         val64 = readq(&bar0->adapter_control);
2320         val64 &= ~ADAPTER_ECC_EN;
2321         writeq(val64, &bar0->adapter_control);
2322
2323         /*
2324          * Verify if the device is ready to be enabled, if so enable
2325          * it.
2326          */
2327         val64 = readq(&bar0->adapter_status);
2328         if (!verify_xena_quiescence(nic)) {
2329                 DBG_PRINT(ERR_DBG, "%s: device is not ready, ", dev->name);
2330                 DBG_PRINT(ERR_DBG, "Adapter status reads: 0x%llx\n",
2331                           (unsigned long long) val64);
2332                 return FAILURE;
2333         }
2334
2335         /*
2336          * With some switches, link might be already up at this point.
2337          * Because of this weird behavior, when we enable laser,
2338          * we may not get link. We need to handle this. We cannot
2339          * figure out which switch is misbehaving. So we are forced to
2340          * make a global change.
2341          */
2342
2343         /* Enabling Laser. */
2344         val64 = readq(&bar0->adapter_control);
2345         val64 |= ADAPTER_EOI_TX_ON;
2346         writeq(val64, &bar0->adapter_control);
2347
2348         if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER) {
2349                 /*
2350                  * Dont see link state interrupts initally on some switches,
2351                  * so directly scheduling the link state task here.
2352                  */
2353                 schedule_work(&nic->set_link_task);
2354         }
2355         /* SXE-002: Initialize link and activity LED */
2356         subid = nic->pdev->subsystem_device;
2357         if (((subid & 0xFF) >= 0x07) &&
2358             (nic->device_type == XFRAME_I_DEVICE)) {
2359                 val64 = readq(&bar0->gpio_control);
2360                 val64 |= 0x0000800000000000ULL;
2361                 writeq(val64, &bar0->gpio_control);
2362                 val64 = 0x0411040400000000ULL;
2363                 writeq(val64, (void __iomem *)bar0 + 0x2700);
2364         }
2365
2366         return SUCCESS;
2367 }
2368 /**
2369  * s2io_txdl_getskb - Get the skb from txdl, unmap and return skb
2370  */
2371 static struct sk_buff *s2io_txdl_getskb(struct fifo_info *fifo_data, struct \
2372                                         TxD *txdlp, int get_off)
2373 {
2374         struct s2io_nic *nic = fifo_data->nic;
2375         struct sk_buff *skb;
2376         struct TxD *txds;
2377         u16 j, frg_cnt;
2378
2379         txds = txdlp;
2380         if (txds->Host_Control == (u64)(long)fifo_data->ufo_in_band_v) {
2381                 pci_unmap_single(nic->pdev, (dma_addr_t)
2382                         txds->Buffer_Pointer, sizeof(u64),
2383                         PCI_DMA_TODEVICE);
2384                 txds++;
2385         }
2386
2387         skb = (struct sk_buff *) ((unsigned long)
2388                         txds->Host_Control);
2389         if (!skb) {
2390                 memset(txdlp, 0, (sizeof(struct TxD) * fifo_data->max_txds));
2391                 return NULL;
2392         }
2393         pci_unmap_single(nic->pdev, (dma_addr_t)
2394                          txds->Buffer_Pointer,
2395                          skb->len - skb->data_len,
2396                          PCI_DMA_TODEVICE);
2397         frg_cnt = skb_shinfo(skb)->nr_frags;
2398         if (frg_cnt) {
2399                 txds++;
2400                 for (j = 0; j < frg_cnt; j++, txds++) {
2401                         skb_frag_t *frag = &skb_shinfo(skb)->frags[j];
2402                         if (!txds->Buffer_Pointer)
2403                                 break;
2404                         pci_unmap_page(nic->pdev, (dma_addr_t)
2405                                         txds->Buffer_Pointer,
2406                                        frag->size, PCI_DMA_TODEVICE);
2407                 }
2408         }
2409         memset(txdlp,0, (sizeof(struct TxD) * fifo_data->max_txds));
2410         return(skb);
2411 }
2412
2413 /**
2414  *  free_tx_buffers - Free all queued Tx buffers
2415  *  @nic : device private variable.
2416  *  Description:
2417  *  Free all queued Tx buffers.
2418  *  Return Value: void
2419 */
2420
2421 static void free_tx_buffers(struct s2io_nic *nic)
2422 {
2423         struct net_device *dev = nic->dev;
2424         struct sk_buff *skb;
2425         struct TxD *txdp;
2426         int i, j;
2427         struct mac_info *mac_control;
2428         struct config_param *config;
2429         int cnt = 0;
2430
2431         mac_control = &nic->mac_control;
2432         config = &nic->config;
2433
2434         for (i = 0; i < config->tx_fifo_num; i++) {
2435                 unsigned long flags;
2436                 spin_lock_irqsave(&mac_control->fifos[i].tx_lock, flags);
2437                 for (j = 0; j < config->tx_cfg[i].fifo_len; j++) {
2438                         txdp = (struct TxD *) \
2439                         mac_control->fifos[i].list_info[j].list_virt_addr;
2440                         skb = s2io_txdl_getskb(&mac_control->fifos[i], txdp, j);
2441                         if (skb) {
2442                                 nic->mac_control.stats_info->sw_stat.mem_freed
2443                                         += skb->truesize;
2444                                 dev_kfree_skb(skb);
2445                                 cnt++;
2446                         }
2447                 }
2448                 DBG_PRINT(INTR_DBG,
2449                           "%s:forcibly freeing %d skbs on FIFO%d\n",
2450                           dev->name, cnt, i);
2451                 mac_control->fifos[i].tx_curr_get_info.offset = 0;
2452                 mac_control->fifos[i].tx_curr_put_info.offset = 0;
2453                 spin_unlock_irqrestore(&mac_control->fifos[i].tx_lock, flags);
2454         }
2455 }
2456
2457 /**
2458  *   stop_nic -  To stop the nic
2459  *   @nic ; device private variable.
2460  *   Description:
2461  *   This function does exactly the opposite of what the start_nic()
2462  *   function does. This function is called to stop the device.
2463  *   Return Value:
2464  *   void.
2465  */
2466
2467 static void stop_nic(struct s2io_nic *nic)
2468 {
2469         struct XENA_dev_config __iomem *bar0 = nic->bar0;
2470         register u64 val64 = 0;
2471         u16 interruptible;
2472         struct mac_info *mac_control;
2473         struct config_param *config;
2474
2475         mac_control = &nic->mac_control;
2476         config = &nic->config;
2477
2478         /*  Disable all interrupts */
2479         en_dis_err_alarms(nic, ENA_ALL_INTRS, DISABLE_INTRS);
2480         interruptible = TX_TRAFFIC_INTR | RX_TRAFFIC_INTR;
2481         interruptible |= TX_PIC_INTR;
2482         en_dis_able_nic_intrs(nic, interruptible, DISABLE_INTRS);
2483
2484         /* Clearing Adapter_En bit of ADAPTER_CONTROL Register */
2485         val64 = readq(&bar0->adapter_control);
2486         val64 &= ~(ADAPTER_CNTL_EN);
2487         writeq(val64, &bar0->adapter_control);
2488 }
2489
2490 /**
2491  *  fill_rx_buffers - Allocates the Rx side skbs
2492  *  @ring_info: per ring structure
2493  *  @from_card_up: If this is true, we will map the buffer to get
2494  *     the dma address for buf0 and buf1 to give it to the card.
2495  *     Else we will sync the already mapped buffer to give it to the card.
2496  *  Description:
2497  *  The function allocates Rx side skbs and puts the physical
2498  *  address of these buffers into the RxD buffer pointers, so that the NIC
2499  *  can DMA the received frame into these locations.
2500  *  The NIC supports 3 receive modes, viz
2501  *  1. single buffer,
2502  *  2. three buffer and
2503  *  3. Five buffer modes.
2504  *  Each mode defines how many fragments the received frame will be split
2505  *  up into by the NIC. The frame is split into L3 header, L4 Header,
2506  *  L4 payload in three buffer mode and in 5 buffer mode, L4 payload itself
2507  *  is split into 3 fragments. As of now only single buffer mode is
2508  *  supported.
2509  *   Return Value:
2510  *  SUCCESS on success or an appropriate -ve value on failure.
2511  */
2512 static int fill_rx_buffers(struct s2io_nic *nic, struct ring_info *ring,
2513                                 int from_card_up)
2514 {
2515         struct sk_buff *skb;
2516         struct RxD_t *rxdp;
2517         int off, size, block_no, block_no1;
2518         u32 alloc_tab = 0;
2519         u32 alloc_cnt;
2520         u64 tmp;
2521         struct buffAdd *ba;
2522         struct RxD_t *first_rxdp = NULL;
2523         u64 Buffer0_ptr = 0, Buffer1_ptr = 0;
2524         int rxd_index = 0;
2525         struct RxD1 *rxdp1;
2526         struct RxD3 *rxdp3;
2527         struct swStat *stats = &ring->nic->mac_control.stats_info->sw_stat;
2528
2529         alloc_cnt = ring->pkt_cnt - ring->rx_bufs_left;
2530
2531         block_no1 = ring->rx_curr_get_info.block_index;
2532         while (alloc_tab < alloc_cnt) {
2533                 block_no = ring->rx_curr_put_info.block_index;
2534
2535                 off = ring->rx_curr_put_info.offset;
2536
2537                 rxdp = ring->rx_blocks[block_no].rxds[off].virt_addr;
2538
2539                 rxd_index = off + 1;
2540                 if (block_no)
2541                         rxd_index += (block_no * ring->rxd_count);
2542
2543                 if ((block_no == block_no1) &&
2544                         (off == ring->rx_curr_get_info.offset) &&
2545                         (rxdp->Host_Control)) {
2546                         DBG_PRINT(INTR_DBG, "%s: Get and Put",
2547                                 ring->dev->name);
2548                         DBG_PRINT(INTR_DBG, " info equated\n");
2549                         goto end;
2550                 }
2551                 if (off && (off == ring->rxd_count)) {
2552                         ring->rx_curr_put_info.block_index++;
2553                         if (ring->rx_curr_put_info.block_index ==
2554                                                         ring->block_count)
2555                                 ring->rx_curr_put_info.block_index = 0;
2556                         block_no = ring->rx_curr_put_info.block_index;
2557                         off = 0;
2558                         ring->rx_curr_put_info.offset = off;
2559                         rxdp = ring->rx_blocks[block_no].block_virt_addr;
2560                         DBG_PRINT(INTR_DBG, "%s: Next block at: %p\n",
2561                                   ring->dev->name, rxdp);
2562
2563                 }
2564
2565                 if ((rxdp->Control_1 & RXD_OWN_XENA) &&
2566                         ((ring->rxd_mode == RXD_MODE_3B) &&
2567                                 (rxdp->Control_2 & s2BIT(0)))) {
2568                         ring->rx_curr_put_info.offset = off;
2569                         goto end;
2570                 }
2571                 /* calculate size of skb based on ring mode */
2572                 size = ring->mtu + HEADER_ETHERNET_II_802_3_SIZE +
2573                                 HEADER_802_2_SIZE + HEADER_SNAP_SIZE;
2574                 if (ring->rxd_mode == RXD_MODE_1)
2575                         size += NET_IP_ALIGN;
2576                 else
2577                         size = ring->mtu + ALIGN_SIZE + BUF0_LEN + 4;
2578
2579                 /* allocate skb */
2580                 skb = dev_alloc_skb(size);
2581                 if(!skb) {
2582                         DBG_PRINT(INFO_DBG, "%s: Out of ", ring->dev->name);
2583                         DBG_PRINT(INFO_DBG, "memory to allocate SKBs\n");
2584                         if (first_rxdp) {
2585                                 wmb();
2586                                 first_rxdp->Control_1 |= RXD_OWN_XENA;
2587                         }
2588                         stats->mem_alloc_fail_cnt++;
2589
2590                         return -ENOMEM ;
2591                 }
2592                 stats->mem_allocated += skb->truesize;
2593
2594                 if (ring->rxd_mode == RXD_MODE_1) {
2595                         /* 1 buffer mode - normal operation mode */
2596                         rxdp1 = (struct RxD1*)rxdp;
2597                         memset(rxdp, 0, sizeof(struct RxD1));
2598                         skb_reserve(skb, NET_IP_ALIGN);
2599                         rxdp1->Buffer0_ptr = pci_map_single
2600                             (ring->pdev, skb->data, size - NET_IP_ALIGN,
2601                                 PCI_DMA_FROMDEVICE);
2602                         if (pci_dma_mapping_error(nic->pdev,
2603                                                 rxdp1->Buffer0_ptr))
2604                                 goto pci_map_failed;
2605
2606                         rxdp->Control_2 =
2607                                 SET_BUFFER0_SIZE_1(size - NET_IP_ALIGN);
2608                         rxdp->Host_Control = (unsigned long) (skb);
2609                 } else if (ring->rxd_mode == RXD_MODE_3B) {
2610                         /*
2611                          * 2 buffer mode -
2612                          * 2 buffer mode provides 128
2613                          * byte aligned receive buffers.
2614                          */
2615
2616                         rxdp3 = (struct RxD3*)rxdp;
2617                         /* save buffer pointers to avoid frequent dma mapping */
2618                         Buffer0_ptr = rxdp3->Buffer0_ptr;
2619                         Buffer1_ptr = rxdp3->Buffer1_ptr;
2620                         memset(rxdp, 0, sizeof(struct RxD3));
2621                         /* restore the buffer pointers for dma sync*/
2622                         rxdp3->Buffer0_ptr = Buffer0_ptr;
2623                         rxdp3->Buffer1_ptr = Buffer1_ptr;
2624
2625                         ba = &ring->ba[block_no][off];
2626                         skb_reserve(skb, BUF0_LEN);
2627                         tmp = (u64)(unsigned long) skb->data;
2628                         tmp += ALIGN_SIZE;
2629                         tmp &= ~ALIGN_SIZE;
2630                         skb->data = (void *) (unsigned long)tmp;
2631                         skb_reset_tail_pointer(skb);
2632
2633                         if (from_card_up) {
2634                                 rxdp3->Buffer0_ptr =
2635                                    pci_map_single(ring->pdev, ba->ba_0,
2636                                         BUF0_LEN, PCI_DMA_FROMDEVICE);
2637                         if (pci_dma_mapping_error(nic->pdev,
2638                                                 rxdp3->Buffer0_ptr))
2639                                         goto pci_map_failed;
2640                         } else
2641                                 pci_dma_sync_single_for_device(ring->pdev,
2642                                 (dma_addr_t) rxdp3->Buffer0_ptr,
2643                                     BUF0_LEN, PCI_DMA_FROMDEVICE);
2644
2645                         rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN);
2646                         if (ring->rxd_mode == RXD_MODE_3B) {
2647                                 /* Two buffer mode */
2648
2649                                 /*
2650                                  * Buffer2 will have L3/L4 header plus
2651                                  * L4 payload
2652                                  */
2653                                 rxdp3->Buffer2_ptr = pci_map_single
2654                                 (ring->pdev, skb->data, ring->mtu + 4,
2655                                                 PCI_DMA_FROMDEVICE);
2656
2657                                 if (pci_dma_mapping_error(nic->pdev,
2658                                                         rxdp3->Buffer2_ptr))
2659                                         goto pci_map_failed;
2660
2661                                 if (from_card_up) {
2662                                         rxdp3->Buffer1_ptr =
2663                                                 pci_map_single(ring->pdev,
2664                                                 ba->ba_1, BUF1_LEN,
2665                                                 PCI_DMA_FROMDEVICE);
2666
2667                                         if (pci_dma_mapping_error(nic->pdev,
2668                                                 rxdp3->Buffer1_ptr)) {
2669                                                 pci_unmap_single
2670                                                         (ring->pdev,
2671                                                     (dma_addr_t)(unsigned long)
2672                                                         skb->data,
2673                                                         ring->mtu + 4,
2674                                                         PCI_DMA_FROMDEVICE);
2675                                                 goto pci_map_failed;
2676                                         }
2677                                 }
2678                                 rxdp->Control_2 |= SET_BUFFER1_SIZE_3(1);
2679                                 rxdp->Control_2 |= SET_BUFFER2_SIZE_3
2680                                                                 (ring->mtu + 4);
2681                         }
2682                         rxdp->Control_2 |= s2BIT(0);
2683                         rxdp->Host_Control = (unsigned long) (skb);
2684                 }
2685                 if (alloc_tab & ((1 << rxsync_frequency) - 1))
2686                         rxdp->Control_1 |= RXD_OWN_XENA;
2687                 off++;
2688                 if (off == (ring->rxd_count + 1))
2689                         off = 0;
2690                 ring->rx_curr_put_info.offset = off;
2691
2692                 rxdp->Control_2 |= SET_RXD_MARKER;
2693                 if (!(alloc_tab & ((1 << rxsync_frequency) - 1))) {
2694                         if (first_rxdp) {
2695                                 wmb();
2696                                 first_rxdp->Control_1 |= RXD_OWN_XENA;
2697                         }
2698                         first_rxdp = rxdp;
2699                 }
2700                 ring->rx_bufs_left += 1;
2701                 alloc_tab++;
2702         }
2703
2704       end:
2705         /* Transfer ownership of first descriptor to adapter just before
2706          * exiting. Before that, use memory barrier so that ownership
2707          * and other fields are seen by adapter correctly.
2708          */
2709         if (first_rxdp) {
2710                 wmb();
2711                 first_rxdp->Control_1 |= RXD_OWN_XENA;
2712         }
2713
2714         return SUCCESS;
2715 pci_map_failed:
2716         stats->pci_map_fail_cnt++;
2717         stats->mem_freed += skb->truesize;
2718         dev_kfree_skb_irq(skb);
2719         return -ENOMEM;
2720 }
2721
2722 static void free_rxd_blk(struct s2io_nic *sp, int ring_no, int blk)
2723 {
2724         struct net_device *dev = sp->dev;
2725         int j;
2726         struct sk_buff *skb;
2727         struct RxD_t *rxdp;
2728         struct mac_info *mac_control;
2729         struct buffAdd *ba;
2730         struct RxD1 *rxdp1;
2731         struct RxD3 *rxdp3;
2732
2733         mac_control = &sp->mac_control;
2734         for (j = 0 ; j < rxd_count[sp->rxd_mode]; j++) {
2735                 rxdp = mac_control->rings[ring_no].
2736                                 rx_blocks[blk].rxds[j].virt_addr;
2737                 skb = (struct sk_buff *)
2738                         ((unsigned long) rxdp->Host_Control);
2739                 if (!skb) {
2740                         continue;
2741                 }
2742                 if (sp->rxd_mode == RXD_MODE_1) {
2743                         rxdp1 = (struct RxD1*)rxdp;
2744                         pci_unmap_single(sp->pdev, (dma_addr_t)
2745                                 rxdp1->Buffer0_ptr,
2746                                 dev->mtu +
2747                                 HEADER_ETHERNET_II_802_3_SIZE
2748                                 + HEADER_802_2_SIZE +
2749                                 HEADER_SNAP_SIZE,
2750                                 PCI_DMA_FROMDEVICE);
2751                         memset(rxdp, 0, sizeof(struct RxD1));
2752                 } else if(sp->rxd_mode == RXD_MODE_3B) {
2753                         rxdp3 = (struct RxD3*)rxdp;
2754                         ba = &mac_control->rings[ring_no].
2755                                 ba[blk][j];
2756                         pci_unmap_single(sp->pdev, (dma_addr_t)
2757                                 rxdp3->Buffer0_ptr,
2758                                 BUF0_LEN,
2759                                 PCI_DMA_FROMDEVICE);
2760                         pci_unmap_single(sp->pdev, (dma_addr_t)
2761                                 rxdp3->Buffer1_ptr,
2762                                 BUF1_LEN,
2763                                 PCI_DMA_FROMDEVICE);
2764                         pci_unmap_single(sp->pdev, (dma_addr_t)
2765                                 rxdp3->Buffer2_ptr,
2766                                 dev->mtu + 4,
2767                                 PCI_DMA_FROMDEVICE);
2768                         memset(rxdp, 0, sizeof(struct RxD3));
2769                 }
2770                 sp->mac_control.stats_info->sw_stat.mem_freed += skb->truesize;
2771                 dev_kfree_skb(skb);
2772                 mac_control->rings[ring_no].rx_bufs_left -= 1;
2773         }
2774 }
2775
2776 /**
2777  *  free_rx_buffers - Frees all Rx buffers
2778  *  @sp: device private variable.
2779  *  Description:
2780  *  This function will free all Rx buffers allocated by host.
2781  *  Return Value:
2782  *  NONE.
2783  */
2784
2785 static void free_rx_buffers(struct s2io_nic *sp)
2786 {
2787         struct net_device *dev = sp->dev;
2788         int i, blk = 0, buf_cnt = 0;
2789         struct mac_info *mac_control;
2790         struct config_param *config;
2791
2792         mac_control = &sp->mac_control;
2793         config = &sp->config;
2794
2795         for (i = 0; i < config->rx_ring_num; i++) {
2796                 for (blk = 0; blk < rx_ring_sz[i]; blk++)
2797                         free_rxd_blk(sp,i,blk);
2798
2799                 mac_control->rings[i].rx_curr_put_info.block_index = 0;
2800                 mac_control->rings[i].rx_curr_get_info.block_index = 0;
2801                 mac_control->rings[i].rx_curr_put_info.offset = 0;
2802                 mac_control->rings[i].rx_curr_get_info.offset = 0;
2803                 mac_control->rings[i].rx_bufs_left = 0;
2804                 DBG_PRINT(INIT_DBG, "%s:Freed 0x%x Rx Buffers on ring%d\n",
2805                           dev->name, buf_cnt, i);
2806         }
2807 }
2808
2809 static int s2io_chk_rx_buffers(struct s2io_nic *nic, struct ring_info *ring)
2810 {
2811         if (fill_rx_buffers(nic, ring, 0) == -ENOMEM) {
2812                 DBG_PRINT(INFO_DBG, "%s:Out of memory", ring->dev->name);
2813                 DBG_PRINT(INFO_DBG, " in Rx Intr!!\n");
2814         }
2815         return 0;
2816 }
2817
2818 /**
2819  * s2io_poll - Rx interrupt handler for NAPI support
2820  * @napi : pointer to the napi structure.
2821  * @budget : The number of packets that were budgeted to be processed
2822  * during  one pass through the 'Poll" function.
2823  * Description:
2824  * Comes into picture only if NAPI support has been incorporated. It does
2825  * the same thing that rx_intr_handler does, but not in a interrupt context
2826  * also It will process only a given number of packets.
2827  * Return value:
2828  * 0 on success and 1 if there are No Rx packets to be processed.
2829  */
2830
2831 static int s2io_poll_msix(struct napi_struct *napi, int budget)
2832 {
2833         struct ring_info *ring = container_of(napi, struct ring_info, napi);
2834         struct net_device *dev = ring->dev;
2835         struct config_param *config;
2836         struct mac_info *mac_control;
2837         int pkts_processed = 0;
2838         u8 __iomem *addr = NULL;
2839         u8 val8 = 0;
2840         struct s2io_nic *nic = dev->priv;
2841         struct XENA_dev_config __iomem *bar0 = nic->bar0;
2842         int budget_org = budget;
2843
2844         config = &nic->config;
2845         mac_control = &nic->mac_control;
2846
2847         if (unlikely(!is_s2io_card_up(nic)))
2848                 return 0;
2849
2850         pkts_processed = rx_intr_handler(ring, budget);
2851         s2io_chk_rx_buffers(nic, ring);
2852
2853         if (pkts_processed < budget_org) {
2854                 netif_rx_complete(dev, napi);
2855                 /*Re Enable MSI-Rx Vector*/
2856                 addr = (u8 __iomem *)&bar0->xmsi_mask_reg;
2857                 addr += 7 - ring->ring_no;
2858                 val8 = (ring->ring_no == 0) ? 0x3f : 0xbf;
2859                 writeb(val8, addr);
2860                 val8 = readb(addr);
2861         }
2862         return pkts_processed;
2863 }
2864 static int s2io_poll_inta(struct napi_struct *napi, int budget)
2865 {
2866         struct s2io_nic *nic = container_of(napi, struct s2io_nic, napi);
2867         struct ring_info *ring;
2868         struct net_device *dev = nic->dev;
2869         struct config_param *config;
2870         struct mac_info *mac_control;
2871         int pkts_processed = 0;
2872         int ring_pkts_processed, i;
2873         struct XENA_dev_config __iomem *bar0 = nic->bar0;
2874         int budget_org = budget;
2875
2876         config = &nic->config;
2877         mac_control = &nic->mac_control;
2878
2879         if (unlikely(!is_s2io_card_up(nic)))
2880                 return 0;
2881
2882         for (i = 0; i < config->rx_ring_num; i++) {
2883                 ring = &mac_control->rings[i];
2884                 ring_pkts_processed = rx_intr_handler(ring, budget);
2885                 s2io_chk_rx_buffers(nic, ring);
2886                 pkts_processed += ring_pkts_processed;
2887                 budget -= ring_pkts_processed;
2888                 if (budget <= 0)
2889                         break;
2890         }
2891         if (pkts_processed < budget_org) {
2892                 netif_rx_complete(dev, napi);
2893                 /* Re enable the Rx interrupts for the ring */
2894                 writeq(0, &bar0->rx_traffic_mask);
2895                 readl(&bar0->rx_traffic_mask);
2896         }
2897         return pkts_processed;
2898 }
2899
2900 #ifdef CONFIG_NET_POLL_CONTROLLER
2901 /**
2902  * s2io_netpoll - netpoll event handler entry point
2903  * @dev : pointer to the device structure.
2904  * Description:
2905  *      This function will be called by upper layer to check for events on the
2906  * interface in situations where interrupts are disabled. It is used for
2907  * specific in-kernel networking tasks, such as remote consoles and kernel
2908  * debugging over the network (example netdump in RedHat).
2909  */
2910 static void s2io_netpoll(struct net_device *dev)
2911 {
2912         struct s2io_nic *nic = dev->priv;
2913         struct mac_info *mac_control;
2914         struct config_param *config;
2915         struct XENA_dev_config __iomem *bar0 = nic->bar0;
2916         u64 val64 = 0xFFFFFFFFFFFFFFFFULL;
2917         int i;
2918
2919         if (pci_channel_offline(nic->pdev))
2920                 return;
2921
2922         disable_irq(dev->irq);
2923
2924         mac_control = &nic->mac_control;
2925         config = &nic->config;
2926
2927         writeq(val64, &bar0->rx_traffic_int);
2928         writeq(val64, &bar0->tx_traffic_int);
2929
2930         /* we need to free up the transmitted skbufs or else netpoll will
2931          * run out of skbs and will fail and eventually netpoll application such
2932          * as netdump will fail.
2933          */
2934         for (i = 0; i < config->tx_fifo_num; i++)
2935                 tx_intr_handler(&mac_control->fifos[i]);
2936
2937         /* check for received packet and indicate up to network */
2938         for (i = 0; i < config->rx_ring_num; i++)
2939                 rx_intr_handler(&mac_control->rings[i], 0);
2940
2941         for (i = 0; i < config->rx_ring_num; i++) {
2942                 if (fill_rx_buffers(nic, &mac_control->rings[i], 0) ==
2943                                 -ENOMEM) {
2944                         DBG_PRINT(INFO_DBG, "%s:Out of memory", dev->name);
2945                         DBG_PRINT(INFO_DBG, " in Rx Netpoll!!\n");
2946                         break;
2947                 }
2948         }
2949         enable_irq(dev->irq);
2950         return;
2951 }
2952 #endif
2953
2954 /**
2955  *  rx_intr_handler - Rx interrupt handler
2956  *  @ring_info: per ring structure.
2957  *  @budget: budget for napi processing.
2958  *  Description:
2959  *  If the interrupt is because of a received frame or if the
2960  *  receive ring contains fresh as yet un-processed frames,this function is
2961  *  called. It picks out the RxD at which place the last Rx processing had
2962  *  stopped and sends the skb to the OSM's Rx handler and then increments
2963  *  the offset.
2964  *  Return Value:
2965  *  No. of napi packets processed.
2966  */
2967 static int rx_intr_handler(struct ring_info *ring_data, int budget)
2968 {
2969         int get_block, put_block;
2970         struct rx_curr_get_info get_info, put_info;
2971         struct RxD_t *rxdp;
2972         struct sk_buff *skb;
2973         int pkt_cnt = 0, napi_pkts = 0;
2974         int i;
2975         struct RxD1* rxdp1;
2976         struct RxD3* rxdp3;
2977
2978         get_info = ring_data->rx_curr_get_info;
2979         get_block = get_info.block_index;
2980         memcpy(&put_info, &ring_data->rx_curr_put_info, sizeof(put_info));
2981         put_block = put_info.block_index;
2982         rxdp = ring_data->rx_blocks[get_block].rxds[get_info.offset].virt_addr;
2983
2984         while (RXD_IS_UP2DT(rxdp)) {
2985                 /*
2986                  * If your are next to put index then it's
2987                  * FIFO full condition
2988                  */
2989                 if ((get_block == put_block) &&
2990                     (get_info.offset + 1) == put_info.offset) {
2991                         DBG_PRINT(INTR_DBG, "%s: Ring Full\n",
2992                                 ring_data->dev->name);
2993                         break;
2994                 }
2995                 skb = (struct sk_buff *) ((unsigned long)rxdp->Host_Control);
2996                 if (skb == NULL) {
2997                         DBG_PRINT(ERR_DBG, "%s: The skb is ",
2998                                   ring_data->dev->name);
2999                         DBG_PRINT(ERR_DBG, "Null in Rx Intr\n");
3000                         return 0;
3001                 }
3002                 if (ring_data->rxd_mode == RXD_MODE_1) {
3003                         rxdp1 = (struct RxD1*)rxdp;
3004                         pci_unmap_single(ring_data->pdev, (dma_addr_t)
3005                                 rxdp1->Buffer0_ptr,
3006                                 ring_data->mtu +
3007                                 HEADER_ETHERNET_II_802_3_SIZE +
3008                                 HEADER_802_2_SIZE +
3009                                 HEADER_SNAP_SIZE,
3010                                 PCI_DMA_FROMDEVICE);
3011                 } else if (ring_data->rxd_mode == RXD_MODE_3B) {
3012                         rxdp3 = (struct RxD3*)rxdp;
3013                         pci_dma_sync_single_for_cpu(ring_data->pdev, (dma_addr_t)
3014                                 rxdp3->Buffer0_ptr,
3015                                 BUF0_LEN, PCI_DMA_FROMDEVICE);
3016                         pci_unmap_single(ring_data->pdev, (dma_addr_t)
3017                                 rxdp3->Buffer2_ptr,
3018                                 ring_data->mtu + 4,
3019                                 PCI_DMA_FROMDEVICE);
3020                 }
3021                 prefetch(skb->data);
3022                 rx_osm_handler(ring_data, rxdp);
3023                 get_info.offset++;
3024                 ring_data->rx_curr_get_info.offset = get_info.offset;
3025                 rxdp = ring_data->rx_blocks[get_block].
3026                                 rxds[get_info.offset].virt_addr;
3027                 if (get_info.offset == rxd_count[ring_data->rxd_mode]) {
3028                         get_info.offset = 0;
3029                         ring_data->rx_curr_get_info.offset = get_info.offset;
3030                         get_block++;
3031                         if (get_block == ring_data->block_count)
3032                                 get_block = 0;
3033                         ring_data->rx_curr_get_info.block_index = get_block;
3034                         rxdp = ring_data->rx_blocks[get_block].block_virt_addr;
3035                 }
3036
3037                 if (ring_data->nic->config.napi) {
3038                         budget--;
3039                         napi_pkts++;
3040                         if (!budget)
3041                                 break;
3042                 }
3043                 pkt_cnt++;
3044                 if ((indicate_max_pkts) && (pkt_cnt > indicate_max_pkts))
3045                         break;
3046         }
3047         if (ring_data->lro) {
3048                 /* Clear all LRO sessions before exiting */
3049                 for (i=0; i<MAX_LRO_SESSIONS; i++) {
3050                         struct lro *lro = &ring_data->lro0_n[i];
3051                         if (lro->in_use) {
3052                                 update_L3L4_header(ring_data->nic, lro);
3053                                 queue_rx_frame(lro->parent, lro->vlan_tag);
3054                                 clear_lro_session(lro);
3055                         }
3056                 }
3057         }
3058         return(napi_pkts);
3059 }
3060
3061 /**
3062  *  tx_intr_handler - Transmit interrupt handler
3063  *  @nic : device private variable
3064  *  Description:
3065  *  If an interrupt was raised to indicate DMA complete of the
3066  *  Tx packet, this function is called. It identifies the last TxD
3067  *  whose buffer was freed and frees all skbs whose data have already
3068  *  DMA'ed into the NICs internal memory.
3069  *  Return Value:
3070  *  NONE
3071  */
3072
3073 static void tx_intr_handler(struct fifo_info *fifo_data)
3074 {
3075         struct s2io_nic *nic = fifo_data->nic;
3076         struct tx_curr_get_info get_info, put_info;
3077         struct sk_buff *skb = NULL;
3078         struct TxD *txdlp;
3079         int pkt_cnt = 0;
3080         unsigned long flags = 0;
3081         u8 err_mask;
3082
3083         if (!spin_trylock_irqsave(&fifo_data->tx_lock, flags))
3084                         return;
3085
3086         get_info = fifo_data->tx_curr_get_info;
3087         memcpy(&put_info, &fifo_data->tx_curr_put_info, sizeof(put_info));
3088         txdlp = (struct TxD *) fifo_data->list_info[get_info.offset].
3089             list_virt_addr;
3090         while ((!(txdlp->Control_1 & TXD_LIST_OWN_XENA)) &&
3091                (get_info.offset != put_info.offset) &&
3092                (txdlp->Host_Control)) {
3093                 /* Check for TxD errors */
3094                 if (txdlp->Control_1 & TXD_T_CODE) {
3095                         unsigned long long err;
3096                         err = txdlp->Control_1 & TXD_T_CODE;
3097                         if (err & 0x1) {
3098                                 nic->mac_control.stats_info->sw_stat.
3099                                                 parity_err_cnt++;
3100                         }
3101
3102                         /* update t_code statistics */
3103                         err_mask = err >> 48;
3104                         switch(err_mask) {
3105                                 case 2:
3106                                         nic->mac_control.stats_info->sw_stat.
3107                                                         tx_buf_abort_cnt++;
3108                                 break;
3109
3110                                 case 3:
3111                                         nic->mac_control.stats_info->sw_stat.
3112                                                         tx_desc_abort_cnt++;
3113                                 break;
3114
3115                                 case 7:
3116                                         nic->mac_control.stats_info->sw_stat.
3117                                                         tx_parity_err_cnt++;
3118                                 break;
3119
3120                                 case 10:
3121                                         nic->mac_control.stats_info->sw_stat.
3122                                                         tx_link_loss_cnt++;
3123                                 break;
3124
3125                                 case 15:
3126                                         nic->mac_control.stats_info->sw_stat.
3127                                                         tx_list_proc_err_cnt++;
3128                                 break;
3129                         }
3130                 }
3131
3132                 skb = s2io_txdl_getskb(fifo_data, txdlp, get_info.offset);
3133                 if (skb == NULL) {
3134                         spin_unlock_irqrestore(&fifo_data->tx_lock, flags);
3135                         DBG_PRINT(ERR_DBG, "%s: Null skb ",
3136                         __func__);
3137                         DBG_PRINT(ERR_DBG, "in Tx Free Intr\n");
3138                         return;
3139                 }
3140                 pkt_cnt++;
3141
3142                 /* Updating the statistics block */
3143                 nic->dev->stats.tx_bytes += skb->len;
3144                 nic->mac_control.stats_info->sw_stat.mem_freed += skb->truesize;
3145                 dev_kfree_skb_irq(skb);
3146
3147                 get_info.offset++;
3148                 if (get_info.offset == get_info.fifo_len + 1)
3149                         get_info.offset = 0;
3150                 txdlp = (struct TxD *) fifo_data->list_info
3151                     [get_info.offset].list_virt_addr;
3152                 fifo_data->tx_curr_get_info.offset =
3153                     get_info.offset;
3154         }
3155
3156         s2io_wake_tx_queue(fifo_data, pkt_cnt, nic->config.multiq);
3157
3158         spin_unlock_irqrestore(&fifo_data->tx_lock, flags);
3159 }
3160
3161 /**
3162  *  s2io_mdio_write - Function to write in to MDIO registers
3163  *  @mmd_type : MMD type value (PMA/PMD/WIS/PCS/PHYXS)
3164  *  @addr     : address value
3165  *  @value    : data value
3166  *  @dev      : pointer to net_device structure
3167  *  Description:
3168  *  This function is used to write values to the MDIO registers
3169  *  NONE
3170  */
3171 static void s2io_mdio_write(u32 mmd_type, u64 addr, u16 value, struct net_device *dev)
3172 {
3173         u64 val64 = 0x0;
3174         struct s2io_nic *sp = dev->priv;
3175         struct XENA_dev_config __iomem *bar0 = sp->bar0;
3176
3177         //address transaction
3178         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
3179                         | MDIO_MMD_DEV_ADDR(mmd_type)
3180                         | MDIO_MMS_PRT_ADDR(0x0);
3181         writeq(val64, &bar0->mdio_control);
3182         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
3183         writeq(val64, &bar0->mdio_control);
3184         udelay(100);
3185
3186         //Data transaction
3187         val64 = 0x0;
3188         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
3189                         | MDIO_MMD_DEV_ADDR(mmd_type)
3190                         | MDIO_MMS_PRT_ADDR(0x0)
3191                         | MDIO_MDIO_DATA(value)
3192                         | MDIO_OP(MDIO_OP_WRITE_TRANS);
3193         writeq(val64, &bar0->mdio_control);
3194         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
3195         writeq(val64, &bar0->mdio_control);
3196         udelay(100);
3197
3198         val64 = 0x0;
3199         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
3200         | MDIO_MMD_DEV_ADDR(mmd_type)
3201         | MDIO_MMS_PRT_ADDR(0x0)
3202         | MDIO_OP(MDIO_OP_READ_TRANS);
3203         writeq(val64, &bar0->mdio_control);
3204         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
3205         writeq(val64, &bar0->mdio_control);
3206         udelay(100);
3207
3208 }
3209
3210 /**
3211  *  s2io_mdio_read - Function to write in to MDIO registers
3212  *  @mmd_type : MMD type value (PMA/PMD/WIS/PCS/PHYXS)
3213  *  @addr     : address value
3214  *  @dev      : pointer to net_device structure
3215  *  Description:
3216  *  This function is used to read values to the MDIO registers
3217  *  NONE
3218  */
3219 static u64 s2io_mdio_read(u32 mmd_type, u64 addr, struct net_device *dev)
3220 {
3221         u64 val64 = 0x0;
3222         u64 rval64 = 0x0;
3223         struct s2io_nic *sp = dev->priv;
3224         struct XENA_dev_config __iomem *bar0 = sp->bar0;
3225
3226         /* address transaction */
3227         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
3228                         | MDIO_MMD_DEV_ADDR(mmd_type)
3229                         | MDIO_MMS_PRT_ADDR(0x0);
3230         writeq(val64, &bar0->mdio_control);
3231         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
3232         writeq(val64, &bar0->mdio_control);
3233         udelay(100);
3234
3235         /* Data transaction */
3236         val64 = 0x0;
3237         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
3238                         | MDIO_MMD_DEV_ADDR(mmd_type)
3239                         | MDIO_MMS_PRT_ADDR(0x0)
3240                         | MDIO_OP(MDIO_OP_READ_TRANS);
3241         writeq(val64, &bar0->mdio_control);
3242         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
3243         writeq(val64, &bar0->mdio_control);
3244         udelay(100);
3245
3246         /* Read the value from regs */
3247         rval64 = readq(&bar0->mdio_control);
3248         rval64 = rval64 & 0xFFFF0000;
3249         rval64 = rval64 >> 16;
3250         return rval64;
3251 }
3252 /**
3253  *  s2io_chk_xpak_counter - Function to check the status of the xpak counters
3254  *  @counter      : couter value to be updated
3255  *  @flag         : flag to indicate the status
3256  *  @type         : counter type
3257  *  Description:
3258  *  This function is to check the status of the xpak counters value
3259  *  NONE
3260  */
3261
3262 static void s2io_chk_xpak_counter(u64 *counter, u64 * regs_stat, u32 index, u16 flag, u16 type)
3263 {
3264         u64 mask = 0x3;
3265         u64 val64;
3266         int i;
3267         for(i = 0; i <index; i++)
3268                 mask = mask << 0x2;
3269
3270         if(flag > 0)
3271         {
3272                 *counter = *counter + 1;
3273                 val64 = *regs_stat & mask;
3274                 val64 = val64 >> (index * 0x2);
3275                 val64 = val64 + 1;
3276                 if(val64 == 3)
3277                 {
3278                         switch(type)
3279                         {
3280                         case 1:
3281                                 DBG_PRINT(ERR_DBG, "Take Xframe NIC out of "
3282                                           "service. Excessive temperatures may "
3283                                           "result in premature transceiver "
3284                                           "failure \n");
3285                         break;
3286                         case 2:
3287                                 DBG_PRINT(ERR_DBG, "Take Xframe NIC out of "
3288                                           "service Excessive bias currents may "
3289                                           "indicate imminent laser diode "
3290                                           "failure \n");
3291                         break;
3292                         case 3:
3293                                 DBG_PRINT(ERR_DBG, "Take Xframe NIC out of "
3294                                           "service Excessive laser output "
3295                                           "power may saturate far-end "
3296                                           "receiver\n");
3297                         break;
3298                         default:
3299                                 DBG_PRINT(ERR_DBG, "Incorrect XPAK Alarm "
3300                                           "type \n");
3301                         }
3302                         val64 = 0x0;
3303                 }
3304                 val64 = val64 << (index * 0x2);
3305                 *regs_stat = (*regs_stat & (~mask)) | (val64);
3306
3307         } else {
3308                 *regs_stat = *regs_stat & (~mask);
3309         }
3310 }
3311
3312 /**
3313  *  s2io_updt_xpak_counter - Function to update the xpak counters
3314  *  @dev         : pointer to net_device struct
3315  *  Description:
3316  *  This function is to upate the status of the xpak counters value
3317  *  NONE
3318  */
3319 static void s2io_updt_xpak_counter(struct net_device *dev)
3320 {
3321         u16 flag  = 0x0;
3322         u16 type  = 0x0;
3323         u16 val16 = 0x0;
3324         u64 val64 = 0x0;
3325         u64 addr  = 0x0;
3326
3327         struct s2io_nic *sp = dev->priv;
3328         struct stat_block *stat_info = sp->mac_control.stats_info;
3329
3330         /* Check the communication with the MDIO slave */
3331         addr = 0x0000;
3332         val64 = 0x0;
3333         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
3334         if((val64 == 0xFFFF) || (val64 == 0x0000))
3335         {
3336                 DBG_PRINT(ERR_DBG, "ERR: MDIO slave access failed - "
3337                           "Returned %llx\n", (unsigned long long)val64);
3338                 return;
3339         }
3340
3341         /* Check for the expecte value of 2040 at PMA address 0x0000 */
3342         if(val64 != 0x2040)
3343         {
3344                 DBG_PRINT(ERR_DBG, "Incorrect value at PMA address 0x0000 - ");
3345                 DBG_PRINT(ERR_DBG, "Returned: %llx- Expected: 0x2040\n",
3346                           (unsigned long long)val64);
3347                 return;
3348         }
3349
3350         /* Loading the DOM register to MDIO register */
3351         addr = 0xA100;
3352         s2io_mdio_write(MDIO_MMD_PMA_DEV_ADDR, addr, val16, dev);
3353         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
3354
3355         /* Reading the Alarm flags */
3356         addr = 0xA070;
3357         val64 = 0x0;
3358         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
3359
3360         flag = CHECKBIT(val64, 0x7);
3361         type = 1;
3362         s2io_chk_xpak_counter(&stat_info->xpak_stat.alarm_transceiver_temp_high,
3363                                 &stat_info->xpak_stat.xpak_regs_stat,
3364                                 0x0, flag, type);
3365
3366         if(CHECKBIT(val64, 0x6))
3367                 stat_info->xpak_stat.alarm_transceiver_temp_low++;
3368
3369         flag = CHECKBIT(val64, 0x3);
3370         type = 2;
3371         s2io_chk_xpak_counter(&stat_info->xpak_stat.alarm_laser_bias_current_high,
3372                                 &stat_info->xpak_stat.xpak_regs_stat,
3373                                 0x2, flag, type);
3374
3375         if(CHECKBIT(val64, 0x2))
3376                 stat_info->xpak_stat.alarm_laser_bias_current_low++;
3377
3378         flag = CHECKBIT(val64, 0x1);
3379         type = 3;
3380         s2io_chk_xpak_counter(&stat_info->xpak_stat.alarm_laser_output_power_high,
3381                                 &stat_info->xpak_stat.xpak_regs_stat,
3382                                 0x4, flag, type);
3383
3384         if(CHECKBIT(val64, 0x0))
3385                 stat_info->xpak_stat.alarm_laser_output_power_low++;
3386
3387         /* Reading the Warning flags */
3388         addr = 0xA074;
3389         val64 = 0x0;
3390         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
3391
3392         if(CHECKBIT(val64, 0x7))
3393                 stat_info->xpak_stat.warn_transceiver_temp_high++;
3394
3395         if(CHECKBIT(val64, 0x6))
3396                 stat_info->xpak_stat.warn_transceiver_temp_low++;
3397
3398         if(CHECKBIT(val64, 0x3))
3399                 stat_info->xpak_stat.warn_laser_bias_current_high++;
3400
3401         if(CHECKBIT(val64, 0x2))
3402                 stat_info->xpak_stat.warn_laser_bias_current_low++;
3403
3404         if(CHECKBIT(val64, 0x1))
3405                 stat_info->xpak_stat.warn_laser_output_power_high++;
3406
3407         if(CHECKBIT(val64, 0x0))
3408                 stat_info->xpak_stat.warn_laser_output_power_low++;
3409 }
3410
3411 /**
3412  *  wait_for_cmd_complete - waits for a command to complete.
3413  *  @sp : private member of the device structure, which is a pointer to the
3414  *  s2io_nic structure.
3415  *  Description: Function that waits for a command to Write into RMAC
3416  *  ADDR DATA registers to be completed and returns either success or
3417  *  error depending on whether the command was complete or not.
3418  *  Return value:
3419  *   SUCCESS on success and FAILURE on failure.
3420  */
3421
3422 static int wait_for_cmd_complete(void __iomem *addr, u64 busy_bit,
3423                                 int bit_state)
3424 {
3425         int ret = FAILURE, cnt = 0, delay = 1;
3426         u64 val64;
3427
3428         if ((bit_state != S2IO_BIT_RESET) && (bit_state != S2IO_BIT_SET))
3429                 return FAILURE;
3430
3431         do {
3432                 val64 = readq(addr);
3433                 if (bit_state == S2IO_BIT_RESET) {
3434                         if (!(val64 & busy_bit)) {
3435                                 ret = SUCCESS;
3436                                 break;
3437                         }
3438                 } else {
3439                         if (!(val64 & busy_bit)) {
3440                                 ret = SUCCESS;
3441                                 break;
3442                         }
3443                 }
3444
3445                 if(in_interrupt())
3446                         mdelay(delay);
3447                 else
3448                         msleep(delay);
3449
3450                 if (++cnt >= 10)
3451                         delay = 50;
3452         } while (cnt < 20);
3453         return ret;
3454 }
3455 /*
3456  * check_pci_device_id - Checks if the device id is supported
3457  * @id : device id
3458  * Description: Function to check if the pci device id is supported by driver.
3459  * Return value: Actual device id if supported else PCI_ANY_ID
3460  */
3461 static u16 check_pci_device_id(u16 id)
3462 {
3463         switch (id) {
3464         case PCI_DEVICE_ID_HERC_WIN:
3465         case PCI_DEVICE_ID_HERC_UNI:
3466                 return XFRAME_II_DEVICE;
3467         case PCI_DEVICE_ID_S2IO_UNI:
3468         case PCI_DEVICE_ID_S2IO_WIN:
3469                 return XFRAME_I_DEVICE;
3470         default:
3471                 return PCI_ANY_ID;
3472         }
3473 }
3474
3475 /**
3476  *  s2io_reset - Resets the card.
3477  *  @sp : private member of the device structure.
3478  *  Description: Function to Reset the card. This function then also
3479  *  restores the previously saved PCI configuration space registers as
3480  *  the card reset also resets the configuration space.
3481  *  Return value:
3482  *  void.
3483  */
3484
3485 static void s2io_reset(struct s2io_nic * sp)
3486 {
3487         struct XENA_dev_config __iomem *bar0 = sp->bar0;
3488         u64 val64;
3489         u16 subid, pci_cmd;
3490         int i;
3491         u16 val16;
3492         unsigned long long up_cnt, down_cnt, up_time, down_time, reset_cnt;
3493         unsigned long long mem_alloc_cnt, mem_free_cnt, watchdog_cnt;
3494
3495         DBG_PRINT(INIT_DBG,"%s - Resetting XFrame card %s\n",
3496                         __func__, sp->dev->name);
3497
3498         /* Back up  the PCI-X CMD reg, dont want to lose MMRBC, OST settings */
3499         pci_read_config_word(sp->pdev, PCIX_COMMAND_REGISTER, &(pci_cmd));
3500
3501         val64 = SW_RESET_ALL;
3502         writeq(val64, &bar0->sw_reset);
3503         if (strstr(sp->product_name, "CX4")) {
3504                 msleep(750);
3505         }
3506         msleep(250);
3507         for (i = 0; i < S2IO_MAX_PCI_CONFIG_SPACE_REINIT; i++) {
3508
3509                 /* Restore the PCI state saved during initialization. */
3510                 pci_restore_state(sp->pdev);
3511                 pci_read_config_word(sp->pdev, 0x2, &val16);
3512                 if (check_pci_device_id(val16) != (u16)PCI_ANY_ID)
3513                         break;
3514                 msleep(200);
3515         }
3516
3517         if (check_pci_device_id(val16) == (u16)PCI_ANY_ID) {
3518                 DBG_PRINT(ERR_DBG,"%s SW_Reset failed!\n", __func__);
3519         }
3520
3521         pci_write_config_word(sp->pdev, PCIX_COMMAND_REGISTER, pci_cmd);
3522
3523         s2io_init_pci(sp);
3524
3525         /* Set swapper to enable I/O register access */
3526         s2io_set_swapper(sp);
3527
3528         /* restore mac_addr entries */
3529         do_s2io_restore_unicast_mc(sp);
3530
3531         /* Restore the MSIX table entries from local variables */
3532         restore_xmsi_data(sp);
3533
3534         /* Clear certain PCI/PCI-X fields after reset */
3535         if (sp->device_type == XFRAME_II_DEVICE) {
3536                 /* Clear "detected parity error" bit */
3537                 pci_write_config_word(sp->pdev, PCI_STATUS, 0x8000);
3538
3539                 /* Clearing PCIX Ecc status register */
3540                 pci_write_config_dword(sp->pdev, 0x68, 0x7C);
3541
3542                 /* Clearing PCI_STATUS error reflected here */
3543                 writeq(s2BIT(62), &bar0->txpic_int_reg);
3544         }
3545
3546         /* Reset device statistics maintained by OS */
3547         memset(&sp->stats, 0, sizeof (struct net_device_stats));
3548
3549         up_cnt = sp->mac_control.stats_info->sw_stat.link_up_cnt;
3550         down_cnt = sp->mac_control.stats_info->sw_stat.link_down_cnt;
3551         up_time = sp->mac_control.stats_info->sw_stat.link_up_time;
3552         down_time = sp->mac_control.stats_info->sw_stat.link_down_time;
3553         reset_cnt = sp->mac_control.stats_info->sw_stat.soft_reset_cnt;
3554         mem_alloc_cnt = sp->mac_control.stats_info->sw_stat.mem_allocated;
3555         mem_free_cnt = sp->mac_control.stats_info->sw_stat.mem_freed;
3556         watchdog_cnt = sp->mac_control.stats_info->sw_stat.watchdog_timer_cnt;
3557         /* save link up/down time/cnt, reset/memory/watchdog cnt */
3558         memset(sp->mac_control.stats_info, 0, sizeof(struct stat_block));
3559         /* restore link up/down time/cnt, reset/memory/watchdog cnt */
3560         sp->mac_control.stats_info->sw_stat.link_up_cnt = up_cnt;
3561         sp->mac_control.stats_info->sw_stat.link_down_cnt = down_cnt;
3562         sp->mac_control.stats_info->sw_stat.link_up_time = up_time;
3563         sp->mac_control.stats_info->sw_stat.link_down_time = down_time;
3564         sp->mac_control.stats_info->sw_stat.soft_reset_cnt = reset_cnt;
3565         sp->mac_control.stats_info->sw_stat.mem_allocated = mem_alloc_cnt;
3566         sp->mac_control.stats_info->sw_stat.mem_freed = mem_free_cnt;
3567         sp->mac_control.stats_info->sw_stat.watchdog_timer_cnt = watchdog_cnt;
3568
3569         /* SXE-002: Configure link and activity LED to turn it off */
3570         subid = sp->pdev->subsystem_device;
3571         if (((subid & 0xFF) >= 0x07) &&
3572             (sp->device_type == XFRAME_I_DEVICE)) {
3573                 val64 = readq(&bar0->gpio_control);
3574                 val64 |= 0x0000800000000000ULL;
3575                 writeq(val64, &bar0->gpio_control);
3576                 val64 = 0x0411040400000000ULL;
3577                 writeq(val64, (void __iomem *)bar0 + 0x2700);
3578         }
3579
3580         /*
3581          * Clear spurious ECC interrupts that would have occured on
3582          * XFRAME II cards after reset.
3583          */
3584         if (sp->device_type == XFRAME_II_DEVICE) {
3585                 val64 = readq(&bar0->pcc_err_reg);
3586                 writeq(val64, &bar0->pcc_err_reg);
3587         }
3588
3589         sp->device_enabled_once = FALSE;
3590 }
3591
3592 /**
3593  *  s2io_set_swapper - to set the swapper controle on the card
3594  *  @sp : private member of the device structure,
3595  *  pointer to the s2io_nic structure.
3596  *  Description: Function to set the swapper control on the card
3597  *  correctly depending on the 'endianness' of the system.
3598  *  Return value:
3599  *  SUCCESS on success and FAILURE on failure.
3600  */
3601
3602 static int s2io_set_swapper(struct s2io_nic * sp)
3603 {
3604         struct net_device *dev = sp->dev;
3605         struct XENA_dev_config __iomem *bar0 = sp->bar0;
3606         u64 val64, valt, valr;
3607
3608         /*
3609          * Set proper endian settings and verify the same by reading
3610          * the PIF Feed-back register.
3611          */
3612
3613         val64 = readq(&bar0->pif_rd_swapper_fb);
3614         if (val64 != 0x0123456789ABCDEFULL) {
3615                 int i = 0;
3616                 u64 value[] = { 0xC30000C3C30000C3ULL,   /* FE=1, SE=1 */
3617                                 0x8100008181000081ULL,  /* FE=1, SE=0 */
3618                                 0x4200004242000042ULL,  /* FE=0, SE=1 */
3619                                 0};                     /* FE=0, SE=0 */
3620
3621                 while(i<4) {
3622                         writeq(value[i], &bar0->swapper_ctrl);
3623                         val64 = readq(&bar0->pif_rd_swapper_fb);
3624                         if (val64 == 0x0123456789ABCDEFULL)
3625                                 break;
3626                         i++;
3627                 }
3628                 if (i == 4) {
3629                         DBG_PRINT(ERR_DBG, "%s: Endian settings are wrong, ",
3630                                 dev->name);
3631                         DBG_PRINT(ERR_DBG, "feedback read %llx\n",
3632                                 (unsigned long long) val64);
3633                         return FAILURE;
3634                 }
3635                 valr = value[i];
3636         } else {
3637                 valr = readq(&bar0->swapper_ctrl);
3638         }
3639
3640         valt = 0x0123456789ABCDEFULL;
3641         writeq(valt, &bar0->xmsi_address);
3642         val64 = readq(&bar0->xmsi_address);
3643
3644         if(val64 != valt) {
3645                 int i = 0;
3646                 u64 value[] = { 0x00C3C30000C3C300ULL,  /* FE=1, SE=1 */
3647                                 0x0081810000818100ULL,  /* FE=1, SE=0 */
3648                                 0x0042420000424200ULL,  /* FE=0, SE=1 */
3649                                 0};                     /* FE=0, SE=0 */
3650
3651                 while(i<4) {
3652                         writeq((value[i] | valr), &bar0->swapper_ctrl);
3653                         writeq(valt, &bar0->xmsi_address);
3654                         val64 = readq(&bar0->xmsi_address);
3655                         if(val64 == valt)
3656                                 break;
3657                         i++;
3658                 }
3659                 if(i == 4) {
3660                         unsigned long long x = val64;
3661                         DBG_PRINT(ERR_DBG, "Write failed, Xmsi_addr ");
3662                         DBG_PRINT(ERR_DBG, "reads:0x%llx\n", x);
3663                         return FAILURE;
3664                 }
3665         }
3666         val64 = readq(&bar0->swapper_ctrl);
3667         val64 &= 0xFFFF000000000000ULL;
3668
3669 #ifdef  __BIG_ENDIAN
3670         /*
3671          * The device by default set to a big endian format, so a
3672          * big endian driver need not set anything.
3673          */
3674         val64 |= (SWAPPER_CTRL_TXP_FE |
3675                  SWAPPER_CTRL_TXP_SE |
3676                  SWAPPER_CTRL_TXD_R_FE |
3677                  SWAPPER_CTRL_TXD_W_FE |
3678                  SWAPPER_CTRL_TXF_R_FE |
3679                  SWAPPER_CTRL_RXD_R_FE |
3680                  SWAPPER_CTRL_RXD_W_FE |
3681                  SWAPPER_CTRL_RXF_W_FE |
3682                  SWAPPER_CTRL_XMSI_FE |
3683                  SWAPPER_CTRL_STATS_FE | SWAPPER_CTRL_STATS_SE);
3684         if (sp->config.intr_type == INTA)
3685                 val64 |= SWAPPER_CTRL_XMSI_SE;
3686         writeq(val64, &bar0->swapper_ctrl);
3687 #else
3688         /*
3689          * Initially we enable all bits to make it accessible by the
3690          * driver, then we selectively enable only those bits that
3691          * we want to set.
3692          */
3693         val64 |= (SWAPPER_CTRL_TXP_FE |
3694                  SWAPPER_CTRL_TXP_SE |
3695                  SWAPPER_CTRL_TXD_R_FE |
3696                  SWAPPER_CTRL_TXD_R_SE |
3697                  SWAPPER_CTRL_TXD_W_FE |
3698                  SWAPPER_CTRL_TXD_W_SE |
3699                  SWAPPER_CTRL_TXF_R_FE |
3700                  SWAPPER_CTRL_RXD_R_FE |
3701                  SWAPPER_CTRL_RXD_R_SE |
3702                  SWAPPER_CTRL_RXD_W_FE |
3703                  SWAPPER_CTRL_RXD_W_SE |
3704                  SWAPPER_CTRL_RXF_W_FE |
3705                  SWAPPER_CTRL_XMSI_FE |
3706                  SWAPPER_CTRL_STATS_FE | SWAPPER_CTRL_STATS_SE);
3707         if (sp->config.intr_type == INTA)
3708                 val64 |= SWAPPER_CTRL_XMSI_SE;
3709         writeq(val64, &bar0->swapper_ctrl);
3710 #endif
3711         val64 = readq(&bar0->swapper_ctrl);
3712
3713         /*
3714          * Verifying if endian settings are accurate by reading a
3715          * feedback register.
3716          */
3717         val64 = readq(&bar0->pif_rd_swapper_fb);
3718         if (val64 != 0x0123456789ABCDEFULL) {
3719                 /* Endian settings are incorrect, calls for another dekko. */
3720                 DBG_PRINT(ERR_DBG, "%s: Endian settings are wrong, ",
3721                           dev->name);
3722                 DBG_PRINT(ERR_DBG, "feedback read %llx\n",
3723                           (unsigned long long) val64);
3724                 return FAILURE;
3725         }
3726
3727         return SUCCESS;
3728 }
3729
3730 static int wait_for_msix_trans(struct s2io_nic *nic, int i)
3731 {
3732         struct XENA_dev_config __iomem *bar0 = nic->bar0;
3733         u64 val64;
3734         int ret = 0, cnt = 0;
3735
3736         do {
3737                 val64 = readq(&bar0->xmsi_access);
3738                 if (!(val64 & s2BIT(15)))
3739                         break;
3740                 mdelay(1);
3741                 cnt++;
3742         } while(cnt < 5);
3743         if (cnt == 5) {
3744                 DBG_PRINT(ERR_DBG, "XMSI # %d Access failed\n", i);
3745                 ret = 1;
3746         }
3747
3748         return ret;
3749 }
3750
3751 static void restore_xmsi_data(struct s2io_nic *nic)
3752 {
3753         struct XENA_dev_config __iomem *bar0 = nic->bar0;
3754         u64 val64;
3755         int i, msix_index;
3756
3757
3758         if (nic->device_type == XFRAME_I_DEVICE)
3759                 return;
3760
3761         for (i=0; i < MAX_REQUESTED_MSI_X; i++) {
3762                 msix_index = (i) ? ((i-1) * 8 + 1): 0;
3763                 writeq(nic->msix_info[i].addr, &bar0->xmsi_address);
3764                 writeq(nic->msix_info[i].data, &bar0->xmsi_data);
3765                 val64 = (s2BIT(7) | s2BIT(15) | vBIT(msix_index, 26, 6));
3766                 writeq(val64, &bar0->xmsi_access);
3767                 if (wait_for_msix_trans(nic, msix_index)) {
3768                         DBG_PRINT(ERR_DBG, "failed in %s\n", __func__);
3769                         continue;
3770                 }
3771         }
3772 }
3773
3774 static void store_xmsi_data(struct s2io_nic *nic)
3775 {
3776         struct XENA_dev_config __iomem *bar0 = nic->bar0;
3777         u64 val64, addr, data;
3778         int i, msix_index;
3779
3780         if (nic->device_type == XFRAME_I_DEVICE)
3781                 return;
3782
3783         /* Store and display */
3784         for (i=0; i < MAX_REQUESTED_MSI_X; i++) {
3785                 msix_index = (i) ? ((i-1) * 8 + 1): 0;
3786                 val64 = (s2BIT(15) | vBIT(msix_index, 26, 6));
3787                 writeq(val64, &bar0->xmsi_access);
3788                 if (wait_for_msix_trans(nic, msix_index)) {
3789                         DBG_PRINT(ERR_DBG, "failed in %s\n", __func__);
3790                         continue;
3791                 }
3792                 addr = readq(&bar0->xmsi_address);
3793                 data = readq(&bar0->xmsi_data);
3794                 if (addr && data) {
3795                         nic->msix_info[i].addr = addr;
3796                         nic->msix_info[i].data = data;
3797                 }
3798         }
3799 }
3800
3801 static int s2io_enable_msi_x(struct s2io_nic *nic)
3802 {
3803         struct XENA_dev_config __iomem *bar0 = nic->bar0;
3804         u64 rx_mat;
3805         u16 msi_control; /* Temp variable */
3806         int ret, i, j, msix_indx = 1;
3807
3808         nic->entries = kmalloc(nic->num_entries * sizeof(struct msix_entry),
3809                                GFP_KERNEL);
3810         if (!nic->entries) {
3811                 DBG_PRINT(INFO_DBG, "%s: Memory allocation failed\n", \
3812                         __func__);
3813                 nic->mac_control.stats_info->sw_stat.mem_alloc_fail_cnt++;
3814                 return -ENOMEM;
3815         }
3816         nic->mac_control.stats_info->sw_stat.mem_allocated
3817                 += (nic->num_entries * sizeof(struct msix_entry));
3818
3819         memset(nic->entries, 0, nic->num_entries * sizeof(struct msix_entry));
3820
3821         nic->s2io_entries =
3822                 kmalloc(nic->num_entries * sizeof(struct s2io_msix_entry),
3823                                    GFP_KERNEL);
3824         if (!nic->s2io_entries) {
3825                 DBG_PRINT(INFO_DBG, "%s: Memory allocation failed\n",
3826                         __func__);
3827                 nic->mac_control.stats_info->sw_stat.mem_alloc_fail_cnt++;
3828                 kfree(nic->entries);
3829                 nic->mac_control.stats_info->sw_stat.mem_freed
3830                         += (nic->num_entries * sizeof(struct msix_entry));
3831                 return -ENOMEM;
3832         }
3833          nic->mac_control.stats_info->sw_stat.mem_allocated
3834                 += (nic->num_entries * sizeof(struct s2io_msix_entry));
3835         memset(nic->s2io_entries, 0,
3836                 nic->num_entries * sizeof(struct s2io_msix_entry));
3837
3838         nic->entries[0].entry = 0;
3839         nic->s2io_entries[0].entry = 0;
3840         nic->s2io_entries[0].in_use = MSIX_FLG;
3841         nic->s2io_entries[0].type = MSIX_ALARM_TYPE;
3842         nic->s2io_entries[0].arg = &nic->mac_control.fifos;
3843
3844         for (i = 1; i < nic->num_entries; i++) {
3845                 nic->entries[i].entry = ((i - 1) * 8) + 1;
3846                 nic->s2io_entries[i].entry = ((i - 1) * 8) + 1;
3847                 nic->s2io_entries[i].arg = NULL;
3848                 nic->s2io_entries[i].in_use = 0;
3849         }
3850
3851         rx_mat = readq(&bar0->rx_mat);
3852         for (j = 0; j < nic->config.rx_ring_num; j++) {
3853                 rx_mat |= RX_MAT_SET(j, msix_indx);
3854                 nic->s2io_entries[j+1].arg = &nic->mac_control.rings[j];
3855                 nic->s2io_entries[j+1].type = MSIX_RING_TYPE;
3856                 nic->s2io_entries[j+1].in_use = MSIX_FLG;
3857                 msix_indx += 8;
3858         }
3859         writeq(rx_mat, &bar0->rx_mat);
3860         readq(&bar0->rx_mat);
3861
3862         ret = pci_enable_msix(nic->pdev, nic->entries, nic->num_entries);
3863         /* We fail init if error or we get less vectors than min required */
3864         if (ret) {
3865                 DBG_PRINT(ERR_DBG, "%s: Enabling MSIX failed\n", nic->dev->name);
3866                 kfree(nic->entries);
3867                 nic->mac_control.stats_info->sw_stat.mem_freed
3868                         += (nic->num_entries * sizeof(struct msix_entry));
3869                 kfree(nic->s2io_entries);
3870                 nic->mac_control.stats_info->sw_stat.mem_freed
3871                         += (nic->num_entries * sizeof(struct s2io_msix_entry));
3872                 nic->entries = NULL;
3873                 nic->s2io_entries = NULL;
3874                 return -ENOMEM;
3875         }
3876
3877         /*
3878          * To enable MSI-X, MSI also needs to be enabled, due to a bug
3879          * in the herc NIC. (Temp change, needs to be removed later)
3880          */
3881         pci_read_config_word(nic->pdev, 0x42, &msi_control);
3882         msi_control |= 0x1; /* Enable MSI */
3883         pci_write_config_word(nic->pdev, 0x42, msi_control);
3884
3885         return 0;
3886 }
3887
3888 /* Handle software interrupt used during MSI(X) test */
3889 static irqreturn_t s2io_test_intr(int irq, void *dev_id)
3890 {
3891         struct s2io_nic *sp = dev_id;
3892
3893         sp->msi_detected = 1;
3894         wake_up(&sp->msi_wait);
3895
3896         return IRQ_HANDLED;
3897 }
3898
3899 /* Test interrupt path by forcing a a software IRQ */
3900 static int s2io_test_msi(struct s2io_nic *sp)
3901 {
3902         struct pci_dev *pdev = sp->pdev;
3903         struct XENA_dev_config __iomem *bar0 = sp->bar0;
3904         int err;
3905         u64 val64, saved64;
3906
3907         err = request_irq(sp->entries[1].vector, s2io_test_intr, 0,
3908                         sp->name, sp);
3909         if (err) {
3910                 DBG_PRINT(ERR_DBG, "%s: PCI %s: cannot assign irq %d\n",
3911                        sp->dev->name, pci_name(pdev), pdev->irq);
3912                 return err;
3913         }
3914
3915         init_waitqueue_head (&sp->msi_wait);
3916         sp->msi_detected = 0;
3917
3918         saved64 = val64 = readq(&bar0->scheduled_int_ctrl);
3919         val64 |= SCHED_INT_CTRL_ONE_SHOT;
3920         val64 |= SCHED_INT_CTRL_TIMER_EN;
3921         val64 |= SCHED_INT_CTRL_INT2MSI(1);
3922         writeq(val64, &bar0->scheduled_int_ctrl);
3923
3924         wait_event_timeout(sp->msi_wait, sp->msi_detected, HZ/10);
3925
3926         if (!sp->msi_detected) {
3927                 /* MSI(X) test failed, go back to INTx mode */
3928                 DBG_PRINT(ERR_DBG, "%s: PCI %s: No interrupt was generated "
3929                         "using MSI(X) during test\n", sp->dev->name,
3930                         pci_name(pdev));
3931
3932                 err = -EOPNOTSUPP;
3933         }
3934
3935         free_irq(sp->entries[1].vector, sp);
3936
3937         writeq(saved64, &bar0->scheduled_int_ctrl);
3938
3939         return err;
3940 }
3941
3942 static void remove_msix_isr(struct s2io_nic *sp)
3943 {
3944         int i;
3945         u16 msi_control;
3946
3947         for (i = 0; i < sp->num_entries; i++) {
3948                 if (sp->s2io_entries[i].in_use ==
3949                         MSIX_REGISTERED_SUCCESS) {
3950                         int vector = sp->entries[i].vector;
3951                         void *arg = sp->s2io_entries[i].arg;
3952                         free_irq(vector, arg);
3953                 }
3954         }
3955
3956         kfree(sp->entries);
3957         kfree(sp->s2io_entries);
3958         sp->entries = NULL;
3959         sp->s2io_entries = NULL;
3960
3961         pci_read_config_word(sp->pdev, 0x42, &msi_control);
3962         msi_control &= 0xFFFE; /* Disable MSI */
3963         pci_write_config_word(sp->pdev, 0x42, msi_control);
3964
3965         pci_disable_msix(sp->pdev);
3966 }
3967
3968 static void remove_inta_isr(struct s2io_nic *sp)
3969 {
3970         struct net_device *dev = sp->dev;
3971
3972         free_irq(sp->pdev->irq, dev);
3973 }
3974
3975 /* ********************************************************* *
3976  * Functions defined below concern the OS part of the driver *
3977  * ********************************************************* */
3978
3979 /**
3980  *  s2io_open - open entry point of the driver
3981  *  @dev : pointer to the device structure.
3982  *  Description:
3983  *  This function is the open entry point of the driver. It mainly calls a
3984  *  function to allocate Rx buffers and inserts them into the buffer
3985  *  descriptors and then enables the Rx part of the NIC.
3986  *  Return value:
3987  *  0 on success and an appropriate (-)ve integer as defined in errno.h
3988  *   file on failure.
3989  */
3990
3991 static int s2io_open(struct net_device *dev)
3992 {
3993         struct s2io_nic *sp = dev->priv;
3994         int err = 0;
3995
3996         /*
3997          * Make sure you have link off by default every time
3998          * Nic is initialized
3999          */
4000         netif_carrier_off(dev);
4001         sp->last_link_state = 0;
4002
4003         /* Initialize H/W and enable interrupts */
4004         err = s2io_card_up(sp);
4005         if (err) {
4006                 DBG_PRINT(ERR_DBG, "%s: H/W initialization failed\n",
4007                           dev->name);
4008                 goto hw_init_failed;
4009         }
4010
4011         if (do_s2io_prog_unicast(dev, dev->dev_addr) == FAILURE) {
4012                 DBG_PRINT(ERR_DBG, "Set Mac Address Failed\n");
4013                 s2io_card_down(sp);
4014                 err = -ENODEV;
4015                 goto hw_init_failed;
4016         }
4017         s2io_start_all_tx_queue(sp);
4018         return 0;
4019
4020 hw_init_failed:
4021         if (sp->config.intr_type == MSI_X) {
4022                 if (sp->entries) {
4023                         kfree(sp->entries);
4024                         sp->mac_control.stats_info->sw_stat.mem_freed
4025                         += (sp->num_entries * sizeof(struct msix_entry));
4026                 }
4027                 if (sp->s2io_entries) {
4028                         kfree(sp->s2io_entries);
4029                         sp->mac_control.stats_info->sw_stat.mem_freed
4030                         += (sp->num_entries * sizeof(struct s2io_msix_entry));
4031                 }
4032         }
4033         return err;
4034 }
4035
4036 /**
4037  *  s2io_close -close entry point of the driver
4038  *  @dev : device pointer.
4039  *  Description:
4040  *  This is the stop entry point of the driver. It needs to undo exactly
4041  *  whatever was done by the open entry point,thus it's usually referred to
4042  *  as the close function.Among other things this function mainly stops the
4043  *  Rx side of the NIC and frees all the Rx buffers in the Rx rings.
4044  *  Return value:
4045  *  0 on success and an appropriate (-)ve integer as defined in errno.h
4046  *  file on failure.
4047  */
4048
4049 static int s2io_close(struct net_device *dev)
4050 {
4051         struct s2io_nic *sp = dev->priv;
4052         struct config_param *config = &sp->config;
4053         u64 tmp64;
4054         int offset;
4055
4056         /* Return if the device is already closed               *
4057         *  Can happen when s2io_card_up failed in change_mtu    *
4058         */
4059         if (!is_s2io_card_up(sp))
4060                 return 0;
4061
4062         s2io_stop_all_tx_queue(sp);
4063         /* delete all populated mac entries */
4064         for (offset = 1; offset < config->max_mc_addr; offset++) {
4065                 tmp64 = do_s2io_read_unicast_mc(sp, offset);
4066                 if (tmp64 != S2IO_DISABLE_MAC_ENTRY)
4067                         do_s2io_delete_unicast_mc(sp, tmp64);
4068         }
4069
4070         s2io_card_down(sp);
4071
4072         return 0;
4073 }
4074
4075 /**
4076  *  s2io_xmit - Tx entry point of te driver
4077  *  @skb : the socket buffer containing the Tx data.
4078  *  @dev : device pointer.
4079  *  Description :
4080  *  This function is the Tx entry point of the driver. S2IO NIC supports
4081  *  certain protocol assist features on Tx side, namely  CSO, S/G, LSO.
4082  *  NOTE: when device cant queue the pkt,just the trans_start variable will
4083  *  not be upadted.
4084  *  Return value:
4085  *  0 on success & 1 on failure.
4086  */
4087
4088 static int s2io_xmit(struct sk_buff *skb, struct net_device *dev)
4089 {
4090         struct s2io_nic *sp = dev->priv;
4091         u16 frg_cnt, frg_len, i, queue, queue_len, put_off, get_off;
4092         register u64 val64;
4093         struct TxD *txdp;
4094         struct TxFIFO_element __iomem *tx_fifo;
4095         unsigned long flags = 0;
4096         u16 vlan_tag = 0;
4097         struct fifo_info *fifo = NULL;
4098         struct mac_info *mac_control;
4099         struct config_param *config;
4100         int do_spin_lock = 1;
4101         int offload_type;
4102         int enable_per_list_interrupt = 0;
4103         struct swStat *stats = &sp->mac_control.stats_info->sw_stat;
4104
4105         mac_control = &sp->mac_control;
4106         config = &sp->config;
4107
4108         DBG_PRINT(TX_DBG, "%s: In Neterion Tx routine\n", dev->name);
4109
4110         if (unlikely(skb->len <= 0)) {
4111                 DBG_PRINT(TX_DBG, "%s:Buffer has no data..\n", dev->name);
4112                 dev_kfree_skb_any(skb);
4113                 return 0;
4114         }
4115
4116         if (!is_s2io_card_up(sp)) {
4117                 DBG_PRINT(TX_DBG, "%s: Card going down for reset\n",
4118                           dev->name);
4119                 dev_kfree_skb(skb);
4120                 return 0;
4121         }
4122
4123         queue = 0;
4124         if (sp->vlgrp && vlan_tx_tag_present(skb))
4125                 vlan_tag = vlan_tx_tag_get(skb);
4126         if (sp->config.tx_steering_type == TX_DEFAULT_STEERING) {
4127                 if (skb->protocol == htons(ETH_P_IP)) {
4128                         struct iphdr *ip;
4129                         struct tcphdr *th;
4130                         ip = ip_hdr(skb);
4131
4132                         if ((ip->frag_off & htons(IP_OFFSET|IP_MF)) == 0) {
4133                                 th = (struct tcphdr *)(((unsigned char *)ip) +
4134                                                 ip->ihl*4);
4135
4136                                 if (ip->protocol == IPPROTO_TCP) {
4137                                         queue_len = sp->total_tcp_fifos;
4138                                         queue = (ntohs(th->source) +
4139                                                         ntohs(th->dest)) &
4140                                             sp->fifo_selector[queue_len - 1];
4141                                         if (queue >= queue_len)
4142                                                 queue = queue_len - 1;
4143                                 } else if (ip->protocol == IPPROTO_UDP) {
4144                                         queue_len = sp->total_udp_fifos;
4145                                         queue = (ntohs(th->source) +
4146                                                         ntohs(th->dest)) &
4147                                             sp->fifo_selector[queue_len - 1];
4148                                         if (queue >= queue_len)
4149                                                 queue = queue_len - 1;
4150                                         queue += sp->udp_fifo_idx;
4151                                         if (skb->len > 1024)
4152                                                 enable_per_list_interrupt = 1;
4153                                         do_spin_lock = 0;
4154                                 }
4155                         }
4156                 }
4157         } else if (sp->config.tx_steering_type == TX_PRIORITY_STEERING)
4158                 /* get fifo number based on skb->priority value */
4159                 queue = config->fifo_mapping
4160                                         [skb->priority & (MAX_TX_FIFOS - 1)];
4161         fifo = &mac_control->fifos[queue];
4162
4163         if (do_spin_lock)
4164                 spin_lock_irqsave(&fifo->tx_lock, flags);
4165         else {
4166                 if (unlikely(!spin_trylock_irqsave(&fifo->tx_lock, flags)))
4167                         return NETDEV_TX_LOCKED;
4168         }
4169
4170         if (sp->config.multiq) {
4171                 if (__netif_subqueue_stopped(dev, fifo->fifo_no)) {
4172                         spin_unlock_irqrestore(&fifo->tx_lock, flags);
4173                         return NETDEV_TX_BUSY;
4174                 }
4175         } else if (unlikely(fifo->queue_state == FIFO_QUEUE_STOP)) {
4176                 if (netif_queue_stopped(dev)) {
4177                         spin_unlock_irqrestore(&fifo->tx_lock, flags);
4178                         return NETDEV_TX_BUSY;
4179                 }
4180         }
4181
4182         put_off = (u16) fifo->tx_curr_put_info.offset;
4183         get_off = (u16) fifo->tx_curr_get_info.offset;
4184         txdp = (struct TxD *) fifo->list_info[put_off].list_virt_addr;
4185
4186         queue_len = fifo->tx_curr_put_info.fifo_len + 1;
4187         /* Avoid "put" pointer going beyond "get" pointer */
4188         if (txdp->Host_Control ||
4189                    ((put_off+1) == queue_len ? 0 : (put_off+1)) == get_off) {
4190                 DBG_PRINT(TX_DBG, "Error in xmit, No free TXDs.\n");
4191                 s2io_stop_tx_queue(sp, fifo->fifo_no);
4192                 dev_kfree_skb(skb);
4193                 spin_unlock_irqrestore(&fifo->tx_lock, flags);
4194                 return 0;
4195         }
4196
4197         offload_type = s2io_offload_type(skb);
4198         if (offload_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) {
4199                 txdp->Control_1 |= TXD_TCP_LSO_EN;
4200                 txdp->Control_1 |= TXD_TCP_LSO_MSS(s2io_tcp_mss(skb));
4201         }
4202         if (skb->ip_summed == CHECKSUM_PARTIAL) {
4203                 txdp->Control_2 |=
4204                     (TXD_TX_CKO_IPV4_EN | TXD_TX_CKO_TCP_EN |
4205                      TXD_TX_CKO_UDP_EN);
4206         }
4207         txdp->Control_1 |= TXD_GATHER_CODE_FIRST;
4208         txdp->Control_1 |= TXD_LIST_OWN_XENA;
4209         txdp->Control_2 |= TXD_INT_NUMBER(fifo->fifo_no);
4210         if (enable_per_list_interrupt)
4211                 if (put_off & (queue_len >> 5))
4212                         txdp->Control_2 |= TXD_INT_TYPE_PER_LIST;
4213         if (vlan_tag) {
4214                 txdp->Control_2 |= TXD_VLAN_ENABLE;
4215                 txdp->Control_2 |= TXD_VLAN_TAG(vlan_tag);
4216         }
4217
4218         frg_len = skb->len - skb->data_len;
4219         if (offload_type == SKB_GSO_UDP) {
4220                 int ufo_size;
4221
4222                 ufo_size = s2io_udp_mss(skb);
4223                 ufo_size &= ~7;
4224                 txdp->Control_1 |= TXD_UFO_EN;
4225                 txdp->Control_1 |= TXD_UFO_MSS(ufo_size);
4226                 txdp->Control_1 |= TXD_BUFFER0_SIZE(8);
4227 #ifdef __BIG_ENDIAN
4228                 /* both variants do cpu_to_be64(be32_to_cpu(...)) */
4229                 fifo->ufo_in_band_v[put_off] =
4230                                 (__force u64)skb_shinfo(skb)->ip6_frag_id;
4231 #else
4232                 fifo->ufo_in_band_v[put_off] =
4233                                 (__force u64)skb_shinfo(skb)->ip6_frag_id << 32;
4234 #endif
4235                 txdp->Host_Control = (unsigned long)fifo->ufo_in_band_v;
4236                 txdp->Buffer_Pointer = pci_map_single(sp->pdev,
4237                                         fifo->ufo_in_band_v,
4238                                         sizeof(u64), PCI_DMA_TODEVICE);
4239                 if (pci_dma_mapping_error(sp->pdev, txdp->Buffer_Pointer))
4240                         goto pci_map_failed;
4241                 txdp++;
4242         }
4243
4244         txdp->Buffer_Pointer = pci_map_single
4245             (sp->pdev, skb->data, frg_len, PCI_DMA_TODEVICE);
4246         if (pci_dma_mapping_error(sp->pdev, txdp->Buffer_Pointer))
4247                 goto pci_map_failed;
4248
4249         txdp->Host_Control = (unsigned long) skb;
4250         txdp->Control_1 |= TXD_BUFFER0_SIZE(frg_len);
4251         if (offload_type == SKB_GSO_UDP)
4252                 txdp->Control_1 |= TXD_UFO_EN;
4253
4254         frg_cnt = skb_shinfo(skb)->nr_frags;
4255         /* For fragmented SKB. */
4256         for (i = 0; i < frg_cnt; i++) {
4257                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
4258                 /* A '0' length fragment will be ignored */
4259                 if (!frag->size)
4260                         continue;
4261                 txdp++;
4262                 txdp->Buffer_Pointer = (u64) pci_map_page
4263                     (sp->pdev, frag->page, frag->page_offset,
4264                      frag->size, PCI_DMA_TODEVICE);
4265                 txdp->Control_1 = TXD_BUFFER0_SIZE(frag->size);
4266                 if (offload_type == SKB_GSO_UDP)
4267                         txdp->Control_1 |= TXD_UFO_EN;
4268         }
4269         txdp->Control_1 |= TXD_GATHER_CODE_LAST;
4270
4271         if (offload_type == SKB_GSO_UDP)
4272                 frg_cnt++; /* as Txd0 was used for inband header */
4273
4274         tx_fifo = mac_control->tx_FIFO_start[queue];
4275         val64 = fifo->list_info[put_off].list_phy_addr;
4276         writeq(val64, &tx_fifo->TxDL_Pointer);
4277
4278         val64 = (TX_FIFO_LAST_TXD_NUM(frg_cnt) | TX_FIFO_FIRST_LIST |
4279                  TX_FIFO_LAST_LIST);
4280         if (offload_type)
4281                 val64 |= TX_FIFO_SPECIAL_FUNC;
4282
4283         writeq(val64, &tx_fifo->List_Control);
4284
4285         mmiowb();
4286
4287         put_off++;
4288         if (put_off == fifo->tx_curr_put_info.fifo_len + 1)
4289                 put_off = 0;
4290         fifo->tx_curr_put_info.offset = put_off;
4291
4292         /* Avoid "put" pointer going beyond "get" pointer */
4293         if (((put_off+1) == queue_len ? 0 : (put_off+1)) == get_off) {
4294                 sp->mac_control.stats_info->sw_stat.fifo_full_cnt++;
4295                 DBG_PRINT(TX_DBG,
4296                           "No free TxDs for xmit, Put: 0x%x Get:0x%x\n",
4297                           put_off, get_off);
4298                 s2io_stop_tx_queue(sp, fifo->fifo_no);
4299         }
4300         mac_control->stats_info->sw_stat.mem_allocated += skb->truesize;
4301         dev->trans_start = jiffies;
4302         spin_unlock_irqrestore(&fifo->tx_lock, flags);
4303
4304         if (sp->config.intr_type == MSI_X)
4305                 tx_intr_handler(fifo);
4306
4307         return 0;
4308 pci_map_failed:
4309         stats->pci_map_fail_cnt++;
4310         s2io_stop_tx_queue(sp, fifo->fifo_no);
4311         stats->mem_freed += skb->truesize;
4312         dev_kfree_skb(skb);
4313         spin_unlock_irqrestore(&fifo->tx_lock, flags);
4314         return 0;
4315 }
4316
4317 static void
4318 s2io_alarm_handle(unsigned long data)
4319 {
4320         struct s2io_nic *sp = (struct s2io_nic *)data;
4321         struct net_device *dev = sp->dev;
4322
4323         s2io_handle_errors(dev);
4324         mod_timer(&sp->alarm_timer, jiffies + HZ / 2);
4325 }
4326
4327 static irqreturn_t s2io_msix_ring_handle(int irq, void *dev_id)
4328 {
4329         struct ring_info *ring = (struct ring_info *)dev_id;
4330         struct s2io_nic *sp = ring->nic;
4331         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4332         struct net_device *dev = sp->dev;
4333
4334         if (unlikely(!is_s2io_card_up(sp)))
4335                 return IRQ_HANDLED;
4336
4337         if (sp->config.napi) {
4338                 u8 __iomem *addr = NULL;
4339                 u8 val8 = 0;
4340
4341                 addr = (u8 __iomem *)&bar0->xmsi_mask_reg;
4342                 addr += (7 - ring->ring_no);
4343                 val8 = (ring->ring_no == 0) ? 0x7f : 0xff;
4344                 writeb(val8, addr);
4345                 val8 = readb(addr);
4346                 netif_rx_schedule(dev, &ring->napi);
4347         } else {
4348                 rx_intr_handler(ring, 0);
4349                 s2io_chk_rx_buffers(sp, ring);
4350         }
4351
4352         return IRQ_HANDLED;
4353 }
4354
4355 static irqreturn_t s2io_msix_fifo_handle(int irq, void *dev_id)
4356 {
4357         int i;
4358         struct fifo_info *fifos = (struct fifo_info *)dev_id;
4359         struct s2io_nic *sp = fifos->nic;
4360         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4361         struct config_param *config  = &sp->config;
4362         u64 reason;
4363
4364         if (unlikely(!is_s2io_card_up(sp)))
4365                 return IRQ_NONE;
4366
4367         reason = readq(&bar0->general_int_status);
4368         if (unlikely(reason == S2IO_MINUS_ONE))
4369                 /* Nothing much can be done. Get out */
4370                 return IRQ_HANDLED;
4371
4372         if (reason & (GEN_INTR_TXPIC | GEN_INTR_TXTRAFFIC)) {
4373                 writeq(S2IO_MINUS_ONE, &bar0->general_int_mask);
4374
4375                 if (reason & GEN_INTR_TXPIC)
4376                         s2io_txpic_intr_handle(sp);
4377
4378                 if (reason & GEN_INTR_TXTRAFFIC)
4379                         writeq(S2IO_MINUS_ONE, &bar0->tx_traffic_int);
4380
4381                 for (i = 0; i < config->tx_fifo_num; i++)
4382                         tx_intr_handler(&fifos[i]);
4383
4384                 writeq(sp->general_int_mask, &bar0->general_int_mask);
4385                 readl(&bar0->general_int_status);
4386                 return IRQ_HANDLED;
4387         }
4388         /* The interrupt was not raised by us */
4389         return IRQ_NONE;
4390 }
4391
4392 static void s2io_txpic_intr_handle(struct s2io_nic *sp)
4393 {
4394         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4395         u64 val64;
4396
4397         val64 = readq(&bar0->pic_int_status);
4398         if (val64 & PIC_INT_GPIO) {
4399                 val64 = readq(&bar0->gpio_int_reg);
4400                 if ((val64 & GPIO_INT_REG_LINK_DOWN) &&
4401                     (val64 & GPIO_INT_REG_LINK_UP)) {
4402                         /*
4403                          * This is unstable state so clear both up/down
4404                          * interrupt and adapter to re-evaluate the link state.
4405                          */
4406                         val64 |=  GPIO_INT_REG_LINK_DOWN;
4407                         val64 |= GPIO_INT_REG_LINK_UP;
4408                         writeq(val64, &bar0->gpio_int_reg);
4409                         val64 = readq(&bar0->gpio_int_mask);
4410                         val64 &= ~(GPIO_INT_MASK_LINK_UP |
4411                                    GPIO_INT_MASK_LINK_DOWN);
4412                         writeq(val64, &bar0->gpio_int_mask);
4413                 }
4414                 else if (val64 & GPIO_INT_REG_LINK_UP) {
4415                         val64 = readq(&bar0->adapter_status);
4416                                 /* Enable Adapter */
4417                         val64 = readq(&bar0->adapter_control);
4418                         val64 |= ADAPTER_CNTL_EN;
4419                         writeq(val64, &bar0->adapter_control);
4420                         val64 |= ADAPTER_LED_ON;
4421                         writeq(val64, &bar0->adapter_control);
4422                         if (!sp->device_enabled_once)
4423                                 sp->device_enabled_once = 1;
4424
4425                         s2io_link(sp, LINK_UP);
4426                         /*
4427                          * unmask link down interrupt and mask link-up
4428                          * intr
4429                          */
4430                         val64 = readq(&bar0->gpio_int_mask);
4431                         val64 &= ~GPIO_INT_MASK_LINK_DOWN;
4432                         val64 |= GPIO_INT_MASK_LINK_UP;
4433                         writeq(val64, &bar0->gpio_int_mask);
4434
4435                 }else if (val64 & GPIO_INT_REG_LINK_DOWN) {
4436                         val64 = readq(&bar0->adapter_status);
4437                         s2io_link(sp, LINK_DOWN);
4438                         /* Link is down so unmaks link up interrupt */
4439                         val64 = readq(&bar0->gpio_int_mask);
4440                         val64 &= ~GPIO_INT_MASK_LINK_UP;
4441                         val64 |= GPIO_INT_MASK_LINK_DOWN;
4442                         writeq(val64, &bar0->gpio_int_mask);
4443
4444                         /* turn off LED */
4445                         val64 = readq(&bar0->adapter_control);
4446                         val64 = val64 &(~ADAPTER_LED_ON);
4447                         writeq(val64, &bar0->adapter_control);
4448                 }
4449         }
4450         val64 = readq(&bar0->gpio_int_mask);
4451 }
4452
4453 /**
4454  *  do_s2io_chk_alarm_bit - Check for alarm and incrment the counter
4455  *  @value: alarm bits
4456  *  @addr: address value
4457  *  @cnt: counter variable
4458  *  Description: Check for alarm and increment the counter
4459  *  Return Value:
4460  *  1 - if alarm bit set
4461  *  0 - if alarm bit is not set
4462  */
4463 static int do_s2io_chk_alarm_bit(u64 value, void __iomem * addr,
4464                           unsigned long long *cnt)
4465 {
4466         u64 val64;
4467         val64 = readq(addr);
4468         if ( val64 & value ) {
4469                 writeq(val64, addr);
4470                 (*cnt)++;
4471                 return 1;
4472         }
4473         return 0;
4474
4475 }
4476
4477 /**
4478  *  s2io_handle_errors - Xframe error indication handler
4479  *  @nic: device private variable
4480  *  Description: Handle alarms such as loss of link, single or
4481  *  double ECC errors, critical and serious errors.
4482  *  Return Value:
4483  *  NONE
4484  */
4485 static void s2io_handle_errors(void * dev_id)
4486 {
4487         struct net_device *dev = (struct net_device *) dev_id;
4488         struct s2io_nic *sp = dev->priv;
4489         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4490         u64 temp64 = 0,val64=0;
4491         int i = 0;
4492
4493         struct swStat *sw_stat = &sp->mac_control.stats_info->sw_stat;
4494         struct xpakStat *stats = &sp->mac_control.stats_info->xpak_stat;
4495
4496         if (!is_s2io_card_up(sp))
4497                 return;
4498
4499         if (pci_channel_offline(sp->pdev))
4500                 return;
4501
4502         memset(&sw_stat->ring_full_cnt, 0,
4503                 sizeof(sw_stat->ring_full_cnt));
4504
4505         /* Handling the XPAK counters update */
4506         if(stats->xpak_timer_count < 72000) {
4507                 /* waiting for an hour */
4508                 stats->xpak_timer_count++;
4509         } else {
4510                 s2io_updt_xpak_counter(dev);
4511                 /* reset the count to zero */
4512                 stats->xpak_timer_count = 0;
4513         }
4514
4515         /* Handling link status change error Intr */
4516         if (s2io_link_fault_indication(sp) == MAC_RMAC_ERR_TIMER) {
4517                 val64 = readq(&bar0->mac_rmac_err_reg);
4518                 writeq(val64, &bar0->mac_rmac_err_reg);
4519                 if (val64 & RMAC_LINK_STATE_CHANGE_INT)
4520                         schedule_work(&sp->set_link_task);
4521         }
4522
4523         /* In case of a serious error, the device will be Reset. */
4524         if (do_s2io_chk_alarm_bit(SERR_SOURCE_ANY, &bar0->serr_source,
4525                                 &sw_stat->serious_err_cnt))
4526                 goto reset;
4527
4528         /* Check for data parity error */
4529         if (do_s2io_chk_alarm_bit(GPIO_INT_REG_DP_ERR_INT, &bar0->gpio_int_reg,
4530                                 &sw_stat->parity_err_cnt))
4531                 goto reset;
4532
4533         /* Check for ring full counter */
4534         if (sp->device_type == XFRAME_II_DEVICE) {
4535                 val64 = readq(&bar0->ring_bump_counter1);
4536                 for (i=0; i<4; i++) {
4537                         temp64 = ( val64 & vBIT(0xFFFF,(i*16),16));
4538                         temp64 >>= 64 - ((i+1)*16);
4539                         sw_stat->ring_full_cnt[i] += temp64;
4540                 }
4541
4542                 val64 = readq(&bar0->ring_bump_counter2);
4543                 for (i=0; i<4; i++) {
4544                         temp64 = ( val64 & vBIT(0xFFFF,(i*16),16));
4545                         temp64 >>= 64 - ((i+1)*16);
4546                          sw_stat->ring_full_cnt[i+4] += temp64;
4547                 }
4548         }
4549
4550         val64 = readq(&bar0->txdma_int_status);
4551         /*check for pfc_err*/
4552         if (val64 & TXDMA_PFC_INT) {
4553                 if (do_s2io_chk_alarm_bit(PFC_ECC_DB_ERR | PFC_SM_ERR_ALARM|
4554                                 PFC_MISC_0_ERR | PFC_MISC_1_ERR|
4555                                 PFC_PCIX_ERR, &bar0->pfc_err_reg,
4556                                 &sw_stat->pfc_err_cnt))
4557                         goto reset;
4558                 do_s2io_chk_alarm_bit(PFC_ECC_SG_ERR, &bar0->pfc_err_reg,
4559                                 &sw_stat->pfc_err_cnt);
4560         }
4561
4562         /*check for tda_err*/
4563         if (val64 & TXDMA_TDA_INT) {
4564                 if(do_s2io_chk_alarm_bit(TDA_Fn_ECC_DB_ERR | TDA_SM0_ERR_ALARM |
4565                                 TDA_SM1_ERR_ALARM, &bar0->tda_err_reg,
4566                                 &sw_stat->tda_err_cnt))
4567                         goto reset;
4568                 do_s2io_chk_alarm_bit(TDA_Fn_ECC_SG_ERR | TDA_PCIX_ERR,
4569                                 &bar0->tda_err_reg, &sw_stat->tda_err_cnt);
4570         }
4571         /*check for pcc_err*/
4572         if (val64 & TXDMA_PCC_INT) {
4573                 if (do_s2io_chk_alarm_bit(PCC_SM_ERR_ALARM | PCC_WR_ERR_ALARM
4574                                 | PCC_N_SERR | PCC_6_COF_OV_ERR
4575                                 | PCC_7_COF_OV_ERR | PCC_6_LSO_OV_ERR
4576                                 | PCC_7_LSO_OV_ERR | PCC_FB_ECC_DB_ERR
4577                                 | PCC_TXB_ECC_DB_ERR, &bar0->pcc_err_reg,
4578                                 &sw_stat->pcc_err_cnt))
4579                         goto reset;
4580                 do_s2io_chk_alarm_bit(PCC_FB_ECC_SG_ERR | PCC_TXB_ECC_SG_ERR,
4581                                 &bar0->pcc_err_reg, &sw_stat->pcc_err_cnt);
4582         }
4583
4584         /*check for tti_err*/
4585         if (val64 & TXDMA_TTI_INT) {
4586                 if (do_s2io_chk_alarm_bit(TTI_SM_ERR_ALARM, &bar0->tti_err_reg,
4587                                 &sw_stat->tti_err_cnt))
4588                         goto reset;
4589                 do_s2io_chk_alarm_bit(TTI_ECC_SG_ERR | TTI_ECC_DB_ERR,
4590                                 &bar0->tti_err_reg, &sw_stat->tti_err_cnt);
4591         }
4592
4593         /*check for lso_err*/
4594         if (val64 & TXDMA_LSO_INT) {
4595                 if (do_s2io_chk_alarm_bit(LSO6_ABORT | LSO7_ABORT
4596                                 | LSO6_SM_ERR_ALARM | LSO7_SM_ERR_ALARM,
4597                                 &bar0->lso_err_reg, &sw_stat->lso_err_cnt))
4598                         goto reset;
4599                 do_s2io_chk_alarm_bit(LSO6_SEND_OFLOW | LSO7_SEND_OFLOW,
4600                                 &bar0->lso_err_reg, &sw_stat->lso_err_cnt);
4601         }
4602
4603         /*check for tpa_err*/
4604         if (val64 & TXDMA_TPA_INT) {
4605                 if (do_s2io_chk_alarm_bit(TPA_SM_ERR_ALARM, &bar0->tpa_err_reg,
4606                         &sw_stat->tpa_err_cnt))
4607                         goto reset;
4608                 do_s2io_chk_alarm_bit(TPA_TX_FRM_DROP, &bar0->tpa_err_reg,
4609                         &sw_stat->tpa_err_cnt);
4610         }
4611
4612         /*check for sm_err*/
4613         if (val64 & TXDMA_SM_INT) {
4614                 if (do_s2io_chk_alarm_bit(SM_SM_ERR_ALARM, &bar0->sm_err_reg,
4615                         &sw_stat->sm_err_cnt))
4616                         goto reset;
4617         }
4618
4619         val64 = readq(&bar0->mac_int_status);
4620         if (val64 & MAC_INT_STATUS_TMAC_INT) {
4621                 if (do_s2io_chk_alarm_bit(TMAC_TX_BUF_OVRN | TMAC_TX_SM_ERR,
4622                                 &bar0->mac_tmac_err_reg,
4623                                 &sw_stat->mac_tmac_err_cnt))
4624                         goto reset;
4625                 do_s2io_chk_alarm_bit(TMAC_ECC_SG_ERR | TMAC_ECC_DB_ERR
4626                                 | TMAC_DESC_ECC_SG_ERR | TMAC_DESC_ECC_DB_ERR,
4627                                 &bar0->mac_tmac_err_reg,
4628                                 &sw_stat->mac_tmac_err_cnt);
4629         }
4630
4631         val64 = readq(&bar0->xgxs_int_status);
4632         if (val64 & XGXS_INT_STATUS_TXGXS) {
4633                 if (do_s2io_chk_alarm_bit(TXGXS_ESTORE_UFLOW | TXGXS_TX_SM_ERR,
4634                                 &bar0->xgxs_txgxs_err_reg,
4635                                 &sw_stat->xgxs_txgxs_err_cnt))
4636                         goto reset;
4637                 do_s2io_chk_alarm_bit(TXGXS_ECC_SG_ERR | TXGXS_ECC_DB_ERR,
4638                                 &bar0->xgxs_txgxs_err_reg,
4639                                 &sw_stat->xgxs_txgxs_err_cnt);
4640         }
4641
4642         val64 = readq(&bar0->rxdma_int_status);
4643         if (val64 & RXDMA_INT_RC_INT_M) {
4644                 if (do_s2io_chk_alarm_bit(RC_PRCn_ECC_DB_ERR | RC_FTC_ECC_DB_ERR
4645                                 | RC_PRCn_SM_ERR_ALARM |RC_FTC_SM_ERR_ALARM,
4646                                 &bar0->rc_err_reg, &sw_stat->rc_err_cnt))
4647                         goto reset;
4648                 do_s2io_chk_alarm_bit(RC_PRCn_ECC_SG_ERR | RC_FTC_ECC_SG_ERR
4649                                 | RC_RDA_FAIL_WR_Rn, &bar0->rc_err_reg,
4650                                 &sw_stat->rc_err_cnt);
4651                 if (do_s2io_chk_alarm_bit(PRC_PCI_AB_RD_Rn | PRC_PCI_AB_WR_Rn
4652                                 | PRC_PCI_AB_F_WR_Rn, &bar0->prc_pcix_err_reg,
4653                                 &sw_stat->prc_pcix_err_cnt))
4654                         goto reset;
4655                 do_s2io_chk_alarm_bit(PRC_PCI_DP_RD_Rn | PRC_PCI_DP_WR_Rn
4656                                 | PRC_PCI_DP_F_WR_Rn, &bar0->prc_pcix_err_reg,
4657                                 &sw_stat->prc_pcix_err_cnt);
4658         }
4659
4660         if (val64 & RXDMA_INT_RPA_INT_M) {
4661                 if (do_s2io_chk_alarm_bit(RPA_SM_ERR_ALARM | RPA_CREDIT_ERR,
4662                                 &bar0->rpa_err_reg, &sw_stat->rpa_err_cnt))
4663                         goto reset;
4664                 do_s2io_chk_alarm_bit(RPA_ECC_SG_ERR | RPA_ECC_DB_ERR,
4665                                 &bar0->rpa_err_reg, &sw_stat->rpa_err_cnt);
4666         }
4667
4668         if (val64 & RXDMA_INT_RDA_INT_M) {
4669                 if (do_s2io_chk_alarm_bit(RDA_RXDn_ECC_DB_ERR
4670                                 | RDA_FRM_ECC_DB_N_AERR | RDA_SM1_ERR_ALARM
4671                                 | RDA_SM0_ERR_ALARM | RDA_RXD_ECC_DB_SERR,
4672                                 &bar0->rda_err_reg, &sw_stat->rda_err_cnt))
4673                         goto reset;
4674                 do_s2io_chk_alarm_bit(RDA_RXDn_ECC_SG_ERR | RDA_FRM_ECC_SG_ERR
4675                                 | RDA_MISC_ERR | RDA_PCIX_ERR,
4676                                 &bar0->rda_err_reg, &sw_stat->rda_err_cnt);
4677         }
4678
4679         if (val64 & RXDMA_INT_RTI_INT_M) {
4680                 if (do_s2io_chk_alarm_bit(RTI_SM_ERR_ALARM, &bar0->rti_err_reg,
4681                                 &sw_stat->rti_err_cnt))
4682                         goto reset;
4683                 do_s2io_chk_alarm_bit(RTI_ECC_SG_ERR | RTI_ECC_DB_ERR,
4684                                 &bar0->rti_err_reg, &sw_stat->rti_err_cnt);
4685         }
4686
4687         val64 = readq(&bar0->mac_int_status);
4688         if (val64 & MAC_INT_STATUS_RMAC_INT) {
4689                 if (do_s2io_chk_alarm_bit(RMAC_RX_BUFF_OVRN | RMAC_RX_SM_ERR,
4690                                 &bar0->mac_rmac_err_reg,
4691                                 &sw_stat->mac_rmac_err_cnt))
4692                         goto reset;
4693                 do_s2io_chk_alarm_bit(RMAC_UNUSED_INT|RMAC_SINGLE_ECC_ERR|
4694                                 RMAC_DOUBLE_ECC_ERR, &bar0->mac_rmac_err_reg,
4695                                 &sw_stat->mac_rmac_err_cnt);
4696         }
4697
4698         val64 = readq(&bar0->xgxs_int_status);
4699         if (val64 & XGXS_INT_STATUS_RXGXS) {
4700                 if (do_s2io_chk_alarm_bit(RXGXS_ESTORE_OFLOW | RXGXS_RX_SM_ERR,
4701                                 &bar0->xgxs_rxgxs_err_reg,
4702                                 &sw_stat->xgxs_rxgxs_err_cnt))
4703                         goto reset;
4704         }
4705
4706         val64 = readq(&bar0->mc_int_status);
4707         if(val64 & MC_INT_STATUS_MC_INT) {
4708                 if (do_s2io_chk_alarm_bit(MC_ERR_REG_SM_ERR, &bar0->mc_err_reg,
4709                                 &sw_stat->mc_err_cnt))
4710                         goto reset;
4711
4712                 /* Handling Ecc errors */
4713                 if (val64 & (MC_ERR_REG_ECC_ALL_SNG | MC_ERR_REG_ECC_ALL_DBL)) {
4714                         writeq(val64, &bar0->mc_err_reg);
4715                         if (val64 & MC_ERR_REG_ECC_ALL_DBL) {
4716                                 sw_stat->double_ecc_errs++;
4717                                 if (sp->device_type != XFRAME_II_DEVICE) {
4718                                         /*
4719                                          * Reset XframeI only if critical error
4720                                          */
4721                                         if (val64 &
4722                                                 (MC_ERR_REG_MIRI_ECC_DB_ERR_0 |
4723                                                 MC_ERR_REG_MIRI_ECC_DB_ERR_1))
4724                                                                 goto reset;
4725                                         }
4726                         } else
4727                                 sw_stat->single_ecc_errs++;
4728                 }
4729         }
4730         return;
4731
4732 reset:
4733         s2io_stop_all_tx_queue(sp);
4734         schedule_work(&sp->rst_timer_task);
4735         sw_stat->soft_reset_cnt++;
4736         return;
4737 }
4738
4739 /**
4740  *  s2io_isr - ISR handler of the device .
4741  *  @irq: the irq of the device.
4742  *  @dev_id: a void pointer to the dev structure of the NIC.
4743  *  Description:  This function is the ISR handler of the device. It
4744  *  identifies the reason for the interrupt and calls the relevant
4745  *  service routines. As a contongency measure, this ISR allocates the
4746  *  recv buffers, if their numbers are below the panic value which is
4747  *  presently set to 25% of the original number of rcv buffers allocated.
4748  *  Return value:
4749  *   IRQ_HANDLED: will be returned if IRQ was handled by this routine
4750  *   IRQ_NONE: will be returned if interrupt is not from our device
4751  */
4752 static irqreturn_t s2io_isr(int irq, void *dev_id)
4753 {
4754         struct net_device *dev = (struct net_device *) dev_id;
4755         struct s2io_nic *sp = dev->priv;
4756         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4757         int i;
4758         u64 reason = 0;
4759         struct mac_info *mac_control;
4760         struct config_param *config;
4761
4762         /* Pretend we handled any irq's from a disconnected card */
4763         if (pci_channel_offline(sp->pdev))
4764                 return IRQ_NONE;
4765
4766         if (!is_s2io_card_up(sp))
4767                 return IRQ_NONE;
4768
4769         mac_control = &sp->mac_control;
4770         config = &sp->config;
4771
4772         /*
4773          * Identify the cause for interrupt and call the appropriate
4774          * interrupt handler. Causes for the interrupt could be;
4775          * 1. Rx of packet.
4776          * 2. Tx complete.
4777          * 3. Link down.
4778          */
4779         reason = readq(&bar0->general_int_status);
4780
4781         if (unlikely(reason == S2IO_MINUS_ONE) ) {
4782                 /* Nothing much can be done. Get out */
4783                 return IRQ_HANDLED;
4784         }
4785
4786         if (reason & (GEN_INTR_RXTRAFFIC |
4787                 GEN_INTR_TXTRAFFIC | GEN_INTR_TXPIC))
4788         {
4789                 writeq(S2IO_MINUS_ONE, &bar0->general_int_mask);
4790
4791                 if (config->napi) {
4792                         if (reason & GEN_INTR_RXTRAFFIC) {
4793                                 netif_rx_schedule(dev, &sp->napi);
4794                                 writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_mask);
4795                                 writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_int);
4796                                 readl(&bar0->rx_traffic_int);
4797                         }
4798                 } else {
4799                         /*
4800                          * rx_traffic_int reg is an R1 register, writing all 1's
4801                          * will ensure that the actual interrupt causing bit
4802                          * get's cleared and hence a read can be avoided.
4803                          */
4804                         if (reason & GEN_INTR_RXTRAFFIC)
4805                                 writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_int);
4806
4807                         for (i = 0; i < config->rx_ring_num; i++)
4808                                 rx_intr_handler(&mac_control->rings[i], 0);
4809                 }
4810
4811                 /*
4812                  * tx_traffic_int reg is an R1 register, writing all 1's
4813                  * will ensure that the actual interrupt causing bit get's
4814                  * cleared and hence a read can be avoided.
4815                  */
4816                 if (reason & GEN_INTR_TXTRAFFIC)
4817                         writeq(S2IO_MINUS_ONE, &bar0->tx_traffic_int);
4818
4819                 for (i = 0; i < config->tx_fifo_num; i++)
4820                         tx_intr_handler(&mac_control->fifos[i]);
4821
4822                 if (reason & GEN_INTR_TXPIC)
4823                         s2io_txpic_intr_handle(sp);
4824
4825                 /*
4826                  * Reallocate the buffers from the interrupt handler itself.
4827                  */
4828                 if (!config->napi) {
4829                         for (i = 0; i < config->rx_ring_num; i++)
4830                                 s2io_chk_rx_buffers(sp, &mac_control->rings[i]);
4831                 }
4832                 writeq(sp->general_int_mask, &bar0->general_int_mask);
4833                 readl(&bar0->general_int_status);
4834
4835                 return IRQ_HANDLED;
4836
4837         }
4838         else if (!reason) {
4839                 /* The interrupt was not raised by us */
4840                 return IRQ_NONE;
4841         }
4842
4843         return IRQ_HANDLED;
4844 }
4845
4846 /**
4847  * s2io_updt_stats -
4848  */
4849 static void s2io_updt_stats(struct s2io_nic *sp)
4850 {
4851         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4852         u64 val64;
4853         int cnt = 0;
4854
4855         if (is_s2io_card_up(sp)) {
4856                 /* Apprx 30us on a 133 MHz bus */
4857                 val64 = SET_UPDT_CLICKS(10) |
4858                         STAT_CFG_ONE_SHOT_EN | STAT_CFG_STAT_EN;
4859                 writeq(val64, &bar0->stat_cfg);
4860                 do {
4861                         udelay(100);
4862                         val64 = readq(&bar0->stat_cfg);
4863                         if (!(val64 & s2BIT(0)))
4864                                 break;
4865                         cnt++;
4866                         if (cnt == 5)
4867                                 break; /* Updt failed */
4868                 } while(1);
4869         }
4870 }
4871
4872 /**
4873  *  s2io_get_stats - Updates the device statistics structure.
4874  *  @dev : pointer to the device structure.
4875  *  Description:
4876  *  This function updates the device statistics structure in the s2io_nic
4877  *  structure and returns a pointer to the same.
4878  *  Return value:
4879  *  pointer to the updated net_device_stats structure.
4880  */
4881
4882 static struct net_device_stats *s2io_get_stats(struct net_device *dev)
4883 {
4884         struct s2io_nic *sp = dev->priv;
4885         struct mac_info *mac_control;
4886         struct config_param *config;
4887         int i;
4888
4889
4890         mac_control = &sp->mac_control;
4891         config = &sp->config;
4892
4893         /* Configure Stats for immediate updt */
4894         s2io_updt_stats(sp);
4895
4896         /* Using sp->stats as a staging area, because reset (due to mtu
4897            change, for example) will clear some hardware counters */
4898         dev->stats.tx_packets +=
4899                 le32_to_cpu(mac_control->stats_info->tmac_frms) -
4900                 sp->stats.tx_packets;
4901         sp->stats.tx_packets =
4902                 le32_to_cpu(mac_control->stats_info->tmac_frms);
4903         dev->stats.tx_errors +=
4904                 le32_to_cpu(mac_control->stats_info->tmac_any_err_frms) -
4905                 sp->stats.tx_errors;
4906         sp->stats.tx_errors =
4907                 le32_to_cpu(mac_control->stats_info->tmac_any_err_frms);
4908         dev->stats.rx_errors +=
4909                 le64_to_cpu(mac_control->stats_info->rmac_drop_frms) -
4910                 sp->stats.rx_errors;
4911         sp->stats.rx_errors =
4912                 le64_to_cpu(mac_control->stats_info->rmac_drop_frms);
4913         dev->stats.multicast =
4914                 le32_to_cpu(mac_control->stats_info->rmac_vld_mcst_frms) -
4915                 sp->stats.multicast;
4916         sp->stats.multicast =
4917                 le32_to_cpu(mac_control->stats_info->rmac_vld_mcst_frms);
4918         dev->stats.rx_length_errors =
4919                 le64_to_cpu(mac_control->stats_info->rmac_long_frms) -
4920                 sp->stats.rx_length_errors;
4921         sp->stats.rx_length_errors =
4922                 le64_to_cpu(mac_control->stats_info->rmac_long_frms);
4923
4924         /* collect per-ring rx_packets and rx_bytes */
4925         dev->stats.rx_packets = dev->stats.rx_bytes = 0;
4926         for (i = 0; i < config->rx_ring_num; i++) {
4927                 dev->stats.rx_packets += mac_control->rings[i].rx_packets;
4928                 dev->stats.rx_bytes += mac_control->rings[i].rx_bytes;
4929         }
4930
4931         return (&dev->stats);
4932 }
4933
4934 /**
4935  *  s2io_set_multicast - entry point for multicast address enable/disable.
4936  *  @dev : pointer to the device structure
4937  *  Description:
4938  *  This function is a driver entry point which gets called by the kernel
4939  *  whenever multicast addresses must be enabled/disabled. This also gets
4940  *  called to set/reset promiscuous mode. Depending on the deivce flag, we
4941  *  determine, if multicast address must be enabled or if promiscuous mode
4942  *  is to be disabled etc.
4943  *  Return value:
4944  *  void.
4945  */
4946
4947 static void s2io_set_multicast(struct net_device *dev)
4948 {
4949         int i, j, prev_cnt;
4950         struct dev_mc_list *mclist;
4951         struct s2io_nic *sp = dev->priv;
4952         struct XENA_dev_config __iomem *bar0 = sp->bar0;
4953         u64 val64 = 0, multi_mac = 0x010203040506ULL, mask =
4954             0xfeffffffffffULL;
4955         u64 dis_addr = S2IO_DISABLE_MAC_ENTRY, mac_addr = 0;
4956         void __iomem *add;
4957         struct config_param *config = &sp->config;
4958
4959         if ((dev->flags & IFF_ALLMULTI) && (!sp->m_cast_flg)) {
4960                 /*  Enable all Multicast addresses */
4961                 writeq(RMAC_ADDR_DATA0_MEM_ADDR(multi_mac),
4962                        &bar0->rmac_addr_data0_mem);
4963                 writeq(RMAC_ADDR_DATA1_MEM_MASK(mask),
4964                        &bar0->rmac_addr_data1_mem);
4965                 val64 = RMAC_ADDR_CMD_MEM_WE |
4966                     RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
4967                     RMAC_ADDR_CMD_MEM_OFFSET(config->max_mc_addr - 1);
4968                 writeq(val64, &bar0->rmac_addr_cmd_mem);
4969                 /* Wait till command completes */
4970                 wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
4971                                         RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
4972                                         S2IO_BIT_RESET);
4973
4974                 sp->m_cast_flg = 1;
4975                 sp->all_multi_pos = config->max_mc_addr - 1;
4976         } else if ((dev->flags & IFF_ALLMULTI) && (sp->m_cast_flg)) {
4977                 /*  Disable all Multicast addresses */
4978                 writeq(RMAC_ADDR_DATA0_MEM_ADDR(dis_addr),
4979                        &bar0->rmac_addr_data0_mem);
4980                 writeq(RMAC_ADDR_DATA1_MEM_MASK(0x0),
4981                        &bar0->rmac_addr_data1_mem);
4982                 val64 = RMAC_ADDR_CMD_MEM_WE |
4983                     RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
4984                     RMAC_ADDR_CMD_MEM_OFFSET(sp->all_multi_pos);
4985                 writeq(val64, &bar0->rmac_addr_cmd_mem);
4986                 /* Wait till command completes */
4987                 wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
4988                                         RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
4989                                         S2IO_BIT_RESET);
4990
4991                 sp->m_cast_flg = 0;
4992                 sp->all_multi_pos = 0;
4993         }
4994
4995         if ((dev->flags & IFF_PROMISC) && (!sp->promisc_flg)) {
4996                 /*  Put the NIC into promiscuous mode */
4997                 add = &bar0->mac_cfg;
4998                 val64 = readq(&bar0->mac_cfg);
4999                 val64 |= MAC_CFG_RMAC_PROM_ENABLE;
5000
5001                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
5002                 writel((u32) val64, add);
5003                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
5004                 writel((u32) (val64 >> 32), (add + 4));
5005
5006                 if (vlan_tag_strip != 1) {
5007                         val64 = readq(&bar0->rx_pa_cfg);
5008                         val64 &= ~RX_PA_CFG_STRIP_VLAN_TAG;
5009                         writeq(val64, &bar0->rx_pa_cfg);
5010                         sp->vlan_strip_flag = 0;
5011                 }
5012
5013                 val64 = readq(&bar0->mac_cfg);
5014                 sp->promisc_flg = 1;
5015                 DBG_PRINT(INFO_DBG, "%s: entered promiscuous mode\n",
5016                           dev->name);
5017         } else if (!(dev->flags & IFF_PROMISC) && (sp->promisc_flg)) {
5018                 /*  Remove the NIC from promiscuous mode */
5019                 add = &bar0->mac_cfg;
5020                 val64 = readq(&bar0->mac_cfg);
5021                 val64 &= ~MAC_CFG_RMAC_PROM_ENABLE;
5022
5023                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
5024                 writel((u32) val64, add);
5025                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
5026                 writel((u32) (val64 >> 32), (add + 4));
5027
5028                 if (vlan_tag_strip != 0) {
5029                         val64 = readq(&bar0->rx_pa_cfg);
5030                         val64 |= RX_PA_CFG_STRIP_VLAN_TAG;
5031                         writeq(val64, &bar0->rx_pa_cfg);
5032                         sp->vlan_strip_flag = 1;
5033                 }
5034
5035                 val64 = readq(&bar0->mac_cfg);
5036                 sp->promisc_flg = 0;
5037                 DBG_PRINT(INFO_DBG, "%s: left promiscuous mode\n",
5038                           dev->name);
5039         }
5040
5041         /*  Update individual M_CAST address list */
5042         if ((!sp->m_cast_flg) && dev->mc_count) {
5043                 if (dev->mc_count >
5044                     (config->max_mc_addr - config->max_mac_addr)) {
5045                         DBG_PRINT(ERR_DBG, "%s: No more Rx filters ",
5046                                   dev->name);
5047                         DBG_PRINT(ERR_DBG, "can be added, please enable ");
5048                         DBG_PRINT(ERR_DBG, "ALL_MULTI instead\n");
5049                         return;
5050                 }
5051
5052                 prev_cnt = sp->mc_addr_count;
5053                 sp->mc_addr_count = dev->mc_count;
5054
5055                 /* Clear out the previous list of Mc in the H/W. */
5056                 for (i = 0; i < prev_cnt; i++) {
5057                         writeq(RMAC_ADDR_DATA0_MEM_ADDR(dis_addr),
5058                                &bar0->rmac_addr_data0_mem);
5059                         writeq(RMAC_ADDR_DATA1_MEM_MASK(0ULL),
5060                                 &bar0->rmac_addr_data1_mem);
5061                         val64 = RMAC_ADDR_CMD_MEM_WE |
5062                             RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
5063                             RMAC_ADDR_CMD_MEM_OFFSET
5064                             (config->mc_start_offset + i);
5065                         writeq(val64, &bar0->rmac_addr_cmd_mem);
5066
5067                         /* Wait for command completes */
5068                         if (wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
5069                                         RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
5070                                         S2IO_BIT_RESET)) {
5071                                 DBG_PRINT(ERR_DBG, "%s: Adding ",
5072                                           dev->name);
5073                                 DBG_PRINT(ERR_DBG, "Multicasts failed\n");
5074                                 return;
5075                         }
5076                 }
5077
5078                 /* Create the new Rx filter list and update the same in H/W. */
5079                 for (i = 0, mclist = dev->mc_list; i < dev->mc_count;
5080                      i++, mclist = mclist->next) {
5081                         memcpy(sp->usr_addrs[i].addr, mclist->dmi_addr,
5082                                ETH_ALEN);
5083                         mac_addr = 0;
5084                         for (j = 0; j < ETH_ALEN; j++) {
5085                                 mac_addr |= mclist->dmi_addr[j];
5086                                 mac_addr <<= 8;
5087                         }
5088                         mac_addr >>= 8;
5089                         writeq(RMAC_ADDR_DATA0_MEM_ADDR(mac_addr),
5090                                &bar0->rmac_addr_data0_mem);
5091                         writeq(RMAC_ADDR_DATA1_MEM_MASK(0ULL),
5092                                 &bar0->rmac_addr_data1_mem);
5093                         val64 = RMAC_ADDR_CMD_MEM_WE |
5094                             RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
5095                             RMAC_ADDR_CMD_MEM_OFFSET
5096                             (i + config->mc_start_offset);
5097                         writeq(val64, &bar0->rmac_addr_cmd_mem);
5098
5099                         /* Wait for command completes */
5100                         if (wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
5101                                         RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
5102                                         S2IO_BIT_RESET)) {
5103                                 DBG_PRINT(ERR_DBG, "%s: Adding ",
5104                                           dev->name);
5105                                 DBG_PRINT(ERR_DBG, "Multicasts failed\n");
5106                                 return;
5107                         }
5108                 }
5109         }
5110 }
5111
5112 /* read from CAM unicast & multicast addresses and store it in
5113  * def_mac_addr structure
5114  */
5115 void do_s2io_store_unicast_mc(struct s2io_nic *sp)
5116 {
5117         int offset;
5118         u64 mac_addr = 0x0;
5119         struct config_param *config = &sp->config;
5120
5121         /* store unicast & multicast mac addresses */
5122         for (offset = 0; offset < config->max_mc_addr; offset++) {
5123                 mac_addr = do_s2io_read_unicast_mc(sp, offset);
5124                 /* if read fails disable the entry */
5125                 if (mac_addr == FAILURE)
5126                         mac_addr = S2IO_DISABLE_MAC_ENTRY;
5127                 do_s2io_copy_mac_addr(sp, offset, mac_addr);
5128         }
5129 }
5130
5131 /* restore unicast & multicast MAC to CAM from def_mac_addr structure */
5132 static void do_s2io_restore_unicast_mc(struct s2io_nic *sp)
5133 {
5134         int offset;
5135         struct config_param *config = &sp->config;
5136         /* restore unicast mac address */
5137         for (offset = 0; offset < config->max_mac_addr; offset++)
5138                 do_s2io_prog_unicast(sp->dev,
5139                         sp->def_mac_addr[offset].mac_addr);
5140
5141         /* restore multicast mac address */
5142         for (offset = config->mc_start_offset;
5143                 offset < config->max_mc_addr; offset++)
5144                 do_s2io_add_mc(sp, sp->def_mac_addr[offset].mac_addr);
5145 }
5146
5147 /* add a multicast MAC address to CAM */
5148 static int do_s2io_add_mc(struct s2io_nic *sp, u8 *addr)
5149 {
5150         int i;
5151         u64 mac_addr = 0;
5152         struct config_param *config = &sp->config;
5153
5154         for (i = 0; i < ETH_ALEN; i++) {
5155                 mac_addr <<= 8;
5156                 mac_addr |= addr[i];
5157         }
5158         if ((0ULL == mac_addr) || (mac_addr == S2IO_DISABLE_MAC_ENTRY))
5159                 return SUCCESS;
5160
5161         /* check if the multicast mac already preset in CAM */
5162         for (i = config->mc_start_offset; i < config->max_mc_addr; i++) {
5163                 u64 tmp64;
5164                 tmp64 = do_s2io_read_unicast_mc(sp, i);
5165                 if (tmp64 == S2IO_DISABLE_MAC_ENTRY) /* CAM entry is empty */
5166                         break;
5167
5168                 if (tmp64 == mac_addr)
5169                         return SUCCESS;
5170         }
5171         if (i == config->max_mc_addr) {
5172                 DBG_PRINT(ERR_DBG,
5173                         "CAM full no space left for multicast MAC\n");
5174                 return FAILURE;
5175         }
5176         /* Update the internal structure with this new mac address */
5177         do_s2io_copy_mac_addr(sp, i, mac_addr);
5178
5179         return (do_s2io_add_mac(sp, mac_addr, i));
5180 }
5181
5182 /* add MAC address to CAM */
5183 static int do_s2io_add_mac(struct s2io_nic *sp, u64 addr, int off)
5184 {
5185         u64 val64;
5186         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5187
5188         writeq(RMAC_ADDR_DATA0_MEM_ADDR(addr),
5189                 &bar0->rmac_addr_data0_mem);
5190
5191         val64 =
5192                 RMAC_ADDR_CMD_MEM_WE | RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
5193                 RMAC_ADDR_CMD_MEM_OFFSET(off);
5194         writeq(val64, &bar0->rmac_addr_cmd_mem);
5195
5196         /* Wait till command completes */
5197         if (wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
5198                 RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
5199                 S2IO_BIT_RESET)) {
5200                 DBG_PRINT(INFO_DBG, "do_s2io_add_mac failed\n");
5201                 return FAILURE;
5202         }
5203         return SUCCESS;
5204 }
5205 /* deletes a specified unicast/multicast mac entry from CAM */
5206 static int do_s2io_delete_unicast_mc(struct s2io_nic *sp, u64 addr)
5207 {
5208         int offset;
5209         u64 dis_addr = S2IO_DISABLE_MAC_ENTRY, tmp64;
5210         struct config_param *config = &sp->config;
5211
5212         for (offset = 1;
5213                 offset < config->max_mc_addr; offset++) {
5214                 tmp64 = do_s2io_read_unicast_mc(sp, offset);
5215                 if (tmp64 == addr) {
5216                         /* disable the entry by writing  0xffffffffffffULL */
5217                         if (do_s2io_add_mac(sp, dis_addr, offset) ==  FAILURE)
5218                                 return FAILURE;
5219                         /* store the new mac list from CAM */
5220                         do_s2io_store_unicast_mc(sp);
5221                         return SUCCESS;
5222                 }
5223         }
5224         DBG_PRINT(ERR_DBG, "MAC address 0x%llx not found in CAM\n",
5225                         (unsigned long long)addr);
5226         return FAILURE;
5227 }
5228
5229 /* read mac entries from CAM */
5230 static u64 do_s2io_read_unicast_mc(struct s2io_nic *sp, int offset)
5231 {
5232         u64 tmp64 = 0xffffffffffff0000ULL, val64;
5233         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5234
5235         /* read mac addr */
5236         val64 =
5237                 RMAC_ADDR_CMD_MEM_RD | RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
5238                 RMAC_ADDR_CMD_MEM_OFFSET(offset);
5239         writeq(val64, &bar0->rmac_addr_cmd_mem);
5240
5241         /* Wait till command completes */
5242         if (wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
5243                 RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
5244                 S2IO_BIT_RESET)) {
5245                 DBG_PRINT(INFO_DBG, "do_s2io_read_unicast_mc failed\n");
5246                 return FAILURE;
5247         }
5248         tmp64 = readq(&bar0->rmac_addr_data0_mem);
5249         return (tmp64 >> 16);
5250 }
5251
5252 /**
5253  * s2io_set_mac_addr driver entry point
5254  */
5255
5256 static int s2io_set_mac_addr(struct net_device *dev, void *p)
5257 {
5258         struct sockaddr *addr = p;
5259
5260         if (!is_valid_ether_addr(addr->sa_data))
5261                 return -EINVAL;
5262
5263         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
5264
5265         /* store the MAC address in CAM */
5266         return (do_s2io_prog_unicast(dev, dev->dev_addr));
5267 }
5268 /**
5269  *  do_s2io_prog_unicast - Programs the Xframe mac address
5270  *  @dev : pointer to the device structure.
5271  *  @addr: a uchar pointer to the new mac address which is to be set.
5272  *  Description : This procedure will program the Xframe to receive
5273  *  frames with new Mac Address
5274  *  Return value: SUCCESS on success and an appropriate (-)ve integer
5275  *  as defined in errno.h file on failure.
5276  */
5277
5278 static int do_s2io_prog_unicast(struct net_device *dev, u8 *addr)
5279 {
5280         struct s2io_nic *sp = dev->priv;
5281         register u64 mac_addr = 0, perm_addr = 0;
5282         int i;
5283         u64 tmp64;
5284         struct config_param *config = &sp->config;
5285
5286         /*
5287         * Set the new MAC address as the new unicast filter and reflect this
5288         * change on the device address registered with the OS. It will be
5289         * at offset 0.
5290         */
5291         for (i = 0; i < ETH_ALEN; i++) {
5292                 mac_addr <<= 8;
5293                 mac_addr |= addr[i];
5294                 perm_addr <<= 8;
5295                 perm_addr |= sp->def_mac_addr[0].mac_addr[i];
5296         }
5297
5298         /* check if the dev_addr is different than perm_addr */
5299         if (mac_addr == perm_addr)
5300                 return SUCCESS;
5301
5302         /* check if the mac already preset in CAM */
5303         for (i = 1; i < config->max_mac_addr; i++) {
5304                 tmp64 = do_s2io_read_unicast_mc(sp, i);
5305                 if (tmp64 == S2IO_DISABLE_MAC_ENTRY) /* CAM entry is empty */
5306                         break;
5307
5308                 if (tmp64 == mac_addr) {
5309                         DBG_PRINT(INFO_DBG,
5310                         "MAC addr:0x%llx already present in CAM\n",
5311                         (unsigned long long)mac_addr);
5312                         return SUCCESS;
5313                 }
5314         }
5315         if (i == config->max_mac_addr) {
5316                 DBG_PRINT(ERR_DBG, "CAM full no space left for Unicast MAC\n");
5317                 return FAILURE;
5318         }
5319         /* Update the internal structure with this new mac address */
5320         do_s2io_copy_mac_addr(sp, i, mac_addr);
5321         return (do_s2io_add_mac(sp, mac_addr, i));
5322 }
5323
5324 /**
5325  * s2io_ethtool_sset - Sets different link parameters.
5326  * @sp : private member of the device structure, which is a pointer to the  * s2io_nic structure.
5327  * @info: pointer to the structure with parameters given by ethtool to set
5328  * link information.
5329  * Description:
5330  * The function sets different link parameters provided by the user onto
5331  * the NIC.
5332  * Return value:
5333  * 0 on success.
5334 */
5335
5336 static int s2io_ethtool_sset(struct net_device *dev,
5337                              struct ethtool_cmd *info)
5338 {
5339         struct s2io_nic *sp = dev->priv;
5340         if ((info->autoneg == AUTONEG_ENABLE) ||
5341             (info->speed != SPEED_10000) || (info->duplex != DUPLEX_FULL))
5342                 return -EINVAL;
5343         else {
5344                 s2io_close(sp->dev);
5345                 s2io_open(sp->dev);
5346         }
5347
5348         return 0;
5349 }
5350
5351 /**
5352  * s2io_ethtol_gset - Return link specific information.
5353  * @sp : private member of the device structure, pointer to the
5354  *      s2io_nic structure.
5355  * @info : pointer to the structure with parameters given by ethtool
5356  * to return link information.
5357  * Description:
5358  * Returns link specific information like speed, duplex etc.. to ethtool.
5359  * Return value :
5360  * return 0 on success.
5361  */
5362
5363 static int s2io_ethtool_gset(struct net_device *dev, struct ethtool_cmd *info)
5364 {
5365         struct s2io_nic *sp = dev->priv;
5366         info->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
5367         info->advertising = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
5368         info->port = PORT_FIBRE;
5369
5370         /* info->transceiver */
5371         info->transceiver = XCVR_EXTERNAL;
5372
5373         if (netif_carrier_ok(sp->dev)) {
5374                 info->speed = 10000;
5375                 info->duplex = DUPLEX_FULL;
5376         } else {
5377                 info->speed = -1;
5378                 info->duplex = -1;
5379         }
5380
5381         info->autoneg = AUTONEG_DISABLE;
5382         return 0;
5383 }
5384
5385 /**
5386  * s2io_ethtool_gdrvinfo - Returns driver specific information.
5387  * @sp : private member of the device structure, which is a pointer to the
5388  * s2io_nic structure.
5389  * @info : pointer to the structure with parameters given by ethtool to
5390  * return driver information.
5391  * Description:
5392  * Returns driver specefic information like name, version etc.. to ethtool.
5393  * Return value:
5394  *  void
5395  */
5396
5397 static void s2io_ethtool_gdrvinfo(struct net_device *dev,
5398                                   struct ethtool_drvinfo *info)
5399 {
5400         struct s2io_nic *sp = dev->priv;
5401
5402         strncpy(info->driver, s2io_driver_name, sizeof(info->driver));
5403         strncpy(info->version, s2io_driver_version, sizeof(info->version));
5404         strncpy(info->fw_version, "", sizeof(info->fw_version));
5405         strncpy(info->bus_info, pci_name(sp->pdev), sizeof(info->bus_info));
5406         info->regdump_len = XENA_REG_SPACE;
5407         info->eedump_len = XENA_EEPROM_SPACE;
5408 }
5409
5410 /**
5411  *  s2io_ethtool_gregs - dumps the entire space of Xfame into the buffer.
5412  *  @sp: private member of the device structure, which is a pointer to the
5413  *  s2io_nic structure.
5414  *  @regs : pointer to the structure with parameters given by ethtool for
5415  *  dumping the registers.
5416  *  @reg_space: The input argumnet into which all the registers are dumped.
5417  *  Description:
5418  *  Dumps the entire register space of xFrame NIC into the user given
5419  *  buffer area.
5420  * Return value :
5421  * void .
5422 */
5423
5424 static void s2io_ethtool_gregs(struct net_device *dev,
5425                                struct ethtool_regs *regs, void *space)
5426 {
5427         int i;
5428         u64 reg;
5429         u8 *reg_space = (u8 *) space;
5430         struct s2io_nic *sp = dev->priv;
5431
5432         regs->len = XENA_REG_SPACE;
5433         regs->version = sp->pdev->subsystem_device;
5434
5435         for (i = 0; i < regs->len; i += 8) {
5436                 reg = readq(sp->bar0 + i);
5437                 memcpy((reg_space + i), &reg, 8);
5438         }
5439 }
5440
5441 /**
5442  *  s2io_phy_id  - timer function that alternates adapter LED.
5443  *  @data : address of the private member of the device structure, which
5444  *  is a pointer to the s2io_nic structure, provided as an u32.
5445  * Description: This is actually the timer function that alternates the
5446  * adapter LED bit of the adapter control bit to set/reset every time on
5447  * invocation. The timer is set for 1/2 a second, hence tha NIC blinks
5448  *  once every second.
5449 */
5450 static void s2io_phy_id(unsigned long data)
5451 {
5452         struct s2io_nic *sp = (struct s2io_nic *) data;
5453         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5454         u64 val64 = 0;
5455         u16 subid;
5456
5457         subid = sp->pdev->subsystem_device;
5458         if ((sp->device_type == XFRAME_II_DEVICE) ||
5459                    ((subid & 0xFF) >= 0x07)) {
5460                 val64 = readq(&bar0->gpio_control);
5461                 val64 ^= GPIO_CTRL_GPIO_0;
5462                 writeq(val64, &bar0->gpio_control);
5463         } else {
5464                 val64 = readq(&bar0->adapter_control);
5465                 val64 ^= ADAPTER_LED_ON;
5466                 writeq(val64, &bar0->adapter_control);
5467         }
5468
5469         mod_timer(&sp->id_timer, jiffies + HZ / 2);
5470 }
5471
5472 /**
5473  * s2io_ethtool_idnic - To physically identify the nic on the system.
5474  * @sp : private member of the device structure, which is a pointer to the
5475  * s2io_nic structure.
5476  * @id : pointer to the structure with identification parameters given by
5477  * ethtool.
5478  * Description: Used to physically identify the NIC on the system.
5479  * The Link LED will blink for a time specified by the user for
5480  * identification.
5481  * NOTE: The Link has to be Up to be able to blink the LED. Hence
5482  * identification is possible only if it's link is up.
5483  * Return value:
5484  * int , returns 0 on success
5485  */
5486
5487 static int s2io_ethtool_idnic(struct net_device *dev, u32 data)
5488 {
5489         u64 val64 = 0, last_gpio_ctrl_val;
5490         struct s2io_nic *sp = dev->priv;
5491         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5492         u16 subid;
5493
5494         subid = sp->pdev->subsystem_device;
5495         last_gpio_ctrl_val = readq(&bar0->gpio_control);
5496         if ((sp->device_type == XFRAME_I_DEVICE) &&
5497                 ((subid & 0xFF) < 0x07)) {
5498                 val64 = readq(&bar0->adapter_control);
5499                 if (!(val64 & ADAPTER_CNTL_EN)) {
5500                         printk(KERN_ERR
5501                                "Adapter Link down, cannot blink LED\n");
5502                         return -EFAULT;
5503                 }
5504         }
5505         if (sp->id_timer.function == NULL) {
5506                 init_timer(&sp->id_timer);
5507                 sp->id_timer.function = s2io_phy_id;
5508                 sp->id_timer.data = (unsigned long) sp;
5509         }
5510         mod_timer(&sp->id_timer, jiffies);
5511         if (data)
5512                 msleep_interruptible(data * HZ);
5513         else
5514                 msleep_interruptible(MAX_FLICKER_TIME);
5515         del_timer_sync(&sp->id_timer);
5516
5517         if (CARDS_WITH_FAULTY_LINK_INDICATORS(sp->device_type, subid)) {
5518                 writeq(last_gpio_ctrl_val, &bar0->gpio_control);
5519                 last_gpio_ctrl_val = readq(&bar0->gpio_control);
5520         }
5521
5522         return 0;
5523 }
5524
5525 static void s2io_ethtool_gringparam(struct net_device *dev,
5526                                     struct ethtool_ringparam *ering)
5527 {
5528         struct s2io_nic *sp = dev->priv;
5529         int i,tx_desc_count=0,rx_desc_count=0;
5530
5531         if (sp->rxd_mode == RXD_MODE_1)
5532                 ering->rx_max_pending = MAX_RX_DESC_1;
5533         else if (sp->rxd_mode == RXD_MODE_3B)
5534                 ering->rx_max_pending = MAX_RX_DESC_2;
5535
5536         ering->tx_max_pending = MAX_TX_DESC;
5537         for (i = 0 ; i < sp->config.tx_fifo_num ; i++)
5538                 tx_desc_count += sp->config.tx_cfg[i].fifo_len;
5539
5540         DBG_PRINT(INFO_DBG,"\nmax txds : %d\n",sp->config.max_txds);
5541         ering->tx_pending = tx_desc_count;
5542         rx_desc_count = 0;
5543         for (i = 0 ; i < sp->config.rx_ring_num ; i++)
5544                 rx_desc_count += sp->config.rx_cfg[i].num_rxd;
5545
5546         ering->rx_pending = rx_desc_count;
5547
5548         ering->rx_mini_max_pending = 0;
5549         ering->rx_mini_pending = 0;
5550         if(sp->rxd_mode == RXD_MODE_1)
5551                 ering->rx_jumbo_max_pending = MAX_RX_DESC_1;
5552         else if (sp->rxd_mode == RXD_MODE_3B)
5553                 ering->rx_jumbo_max_pending = MAX_RX_DESC_2;
5554         ering->rx_jumbo_pending = rx_desc_count;
5555 }
5556
5557 /**
5558  * s2io_ethtool_getpause_data -Pause frame frame generation and reception.
5559  * @sp : private member of the device structure, which is a pointer to the
5560  *      s2io_nic structure.
5561  * @ep : pointer to the structure with pause parameters given by ethtool.
5562  * Description:
5563  * Returns the Pause frame generation and reception capability of the NIC.
5564  * Return value:
5565  *  void
5566  */
5567 static void s2io_ethtool_getpause_data(struct net_device *dev,
5568                                        struct ethtool_pauseparam *ep)
5569 {
5570         u64 val64;
5571         struct s2io_nic *sp = dev->priv;
5572         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5573
5574         val64 = readq(&bar0->rmac_pause_cfg);
5575         if (val64 & RMAC_PAUSE_GEN_ENABLE)
5576                 ep->tx_pause = TRUE;
5577         if (val64 & RMAC_PAUSE_RX_ENABLE)
5578                 ep->rx_pause = TRUE;
5579         ep->autoneg = FALSE;
5580 }
5581
5582 /**
5583  * s2io_ethtool_setpause_data -  set/reset pause frame generation.
5584  * @sp : private member of the device structure, which is a pointer to the
5585  *      s2io_nic structure.
5586  * @ep : pointer to the structure with pause parameters given by ethtool.
5587  * Description:
5588  * It can be used to set or reset Pause frame generation or reception
5589  * support of the NIC.
5590  * Return value:
5591  * int, returns 0 on Success
5592  */
5593
5594 static int s2io_ethtool_setpause_data(struct net_device *dev,
5595                                struct ethtool_pauseparam *ep)
5596 {
5597         u64 val64;
5598         struct s2io_nic *sp = dev->priv;
5599         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5600
5601         val64 = readq(&bar0->rmac_pause_cfg);
5602         if (ep->tx_pause)
5603                 val64 |= RMAC_PAUSE_GEN_ENABLE;
5604         else
5605                 val64 &= ~RMAC_PAUSE_GEN_ENABLE;
5606         if (ep->rx_pause)
5607                 val64 |= RMAC_PAUSE_RX_ENABLE;
5608         else
5609                 val64 &= ~RMAC_PAUSE_RX_ENABLE;
5610         writeq(val64, &bar0->rmac_pause_cfg);
5611         return 0;
5612 }
5613
5614 /**
5615  * read_eeprom - reads 4 bytes of data from user given offset.
5616  * @sp : private member of the device structure, which is a pointer to the
5617  *      s2io_nic structure.
5618  * @off : offset at which the data must be written
5619  * @data : Its an output parameter where the data read at the given
5620  *      offset is stored.
5621  * Description:
5622  * Will read 4 bytes of data from the user given offset and return the
5623  * read data.
5624  * NOTE: Will allow to read only part of the EEPROM visible through the
5625  *   I2C bus.
5626  * Return value:
5627  *  -1 on failure and 0 on success.
5628  */
5629
5630 #define S2IO_DEV_ID             5
5631 static int read_eeprom(struct s2io_nic * sp, int off, u64 * data)
5632 {
5633         int ret = -1;
5634         u32 exit_cnt = 0;
5635         u64 val64;
5636         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5637
5638         if (sp->device_type == XFRAME_I_DEVICE) {
5639                 val64 = I2C_CONTROL_DEV_ID(S2IO_DEV_ID) | I2C_CONTROL_ADDR(off) |
5640                     I2C_CONTROL_BYTE_CNT(0x3) | I2C_CONTROL_READ |
5641                     I2C_CONTROL_CNTL_START;
5642                 SPECIAL_REG_WRITE(val64, &bar0->i2c_control, LF);
5643
5644                 while (exit_cnt < 5) {
5645                         val64 = readq(&bar0->i2c_control);
5646                         if (I2C_CONTROL_CNTL_END(val64)) {
5647                                 *data = I2C_CONTROL_GET_DATA(val64);
5648                                 ret = 0;
5649                                 break;
5650                         }
5651                         msleep(50);
5652                         exit_cnt++;
5653                 }
5654         }
5655
5656         if (sp->device_type == XFRAME_II_DEVICE) {
5657                 val64 = SPI_CONTROL_KEY(0x9) | SPI_CONTROL_SEL1 |
5658                         SPI_CONTROL_BYTECNT(0x3) |
5659                         SPI_CONTROL_CMD(0x3) | SPI_CONTROL_ADDR(off);
5660                 SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
5661                 val64 |= SPI_CONTROL_REQ;
5662                 SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
5663                 while (exit_cnt < 5) {
5664                         val64 = readq(&bar0->spi_control);
5665                         if (val64 & SPI_CONTROL_NACK) {
5666                                 ret = 1;
5667                                 break;
5668                         } else if (val64 & SPI_CONTROL_DONE) {
5669                                 *data = readq(&bar0->spi_data);
5670                                 *data &= 0xffffff;
5671                                 ret = 0;
5672                                 break;
5673                         }
5674                         msleep(50);
5675                         exit_cnt++;
5676                 }
5677         }
5678         return ret;
5679 }
5680
5681 /**
5682  *  write_eeprom - actually writes the relevant part of the data value.
5683  *  @sp : private member of the device structure, which is a pointer to the
5684  *       s2io_nic structure.
5685  *  @off : offset at which the data must be written
5686  *  @data : The data that is to be written
5687  *  @cnt : Number of bytes of the data that are actually to be written into
5688  *  the Eeprom. (max of 3)
5689  * Description:
5690  *  Actually writes the relevant part of the data value into the Eeprom
5691  *  through the I2C bus.
5692  * Return value:
5693  *  0 on success, -1 on failure.
5694  */
5695
5696 static int write_eeprom(struct s2io_nic * sp, int off, u64 data, int cnt)
5697 {
5698         int exit_cnt = 0, ret = -1;
5699         u64 val64;
5700         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5701
5702         if (sp->device_type == XFRAME_I_DEVICE) {
5703                 val64 = I2C_CONTROL_DEV_ID(S2IO_DEV_ID) | I2C_CONTROL_ADDR(off) |
5704                     I2C_CONTROL_BYTE_CNT(cnt) | I2C_CONTROL_SET_DATA((u32)data) |
5705                     I2C_CONTROL_CNTL_START;
5706                 SPECIAL_REG_WRITE(val64, &bar0->i2c_control, LF);
5707
5708                 while (exit_cnt < 5) {
5709                         val64 = readq(&bar0->i2c_control);
5710                         if (I2C_CONTROL_CNTL_END(val64)) {
5711                                 if (!(val64 & I2C_CONTROL_NACK))
5712                                         ret = 0;
5713                                 break;
5714                         }
5715                         msleep(50);
5716                         exit_cnt++;
5717                 }
5718         }
5719
5720         if (sp->device_type == XFRAME_II_DEVICE) {
5721                 int write_cnt = (cnt == 8) ? 0 : cnt;
5722                 writeq(SPI_DATA_WRITE(data,(cnt<<3)), &bar0->spi_data);
5723
5724                 val64 = SPI_CONTROL_KEY(0x9) | SPI_CONTROL_SEL1 |
5725                         SPI_CONTROL_BYTECNT(write_cnt) |
5726                         SPI_CONTROL_CMD(0x2) | SPI_CONTROL_ADDR(off);
5727                 SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
5728                 val64 |= SPI_CONTROL_REQ;
5729                 SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
5730                 while (exit_cnt < 5) {
5731                         val64 = readq(&bar0->spi_control);
5732                         if (val64 & SPI_CONTROL_NACK) {
5733                                 ret = 1;
5734                                 break;
5735                         } else if (val64 & SPI_CONTROL_DONE) {
5736                                 ret = 0;
5737                                 break;
5738                         }
5739                         msleep(50);
5740                         exit_cnt++;
5741                 }
5742         }
5743         return ret;
5744 }
5745 static void s2io_vpd_read(struct s2io_nic *nic)
5746 {
5747         u8 *vpd_data;
5748         u8 data;
5749         int i=0, cnt, fail = 0;
5750         int vpd_addr = 0x80;
5751
5752         if (nic->device_type == XFRAME_II_DEVICE) {
5753                 strcpy(nic->product_name, "Xframe II 10GbE network adapter");
5754                 vpd_addr = 0x80;
5755         }
5756         else {
5757                 strcpy(nic->product_name, "Xframe I 10GbE network adapter");
5758                 vpd_addr = 0x50;
5759         }
5760         strcpy(nic->serial_num, "NOT AVAILABLE");
5761
5762         vpd_data = kmalloc(256, GFP_KERNEL);
5763         if (!vpd_data) {
5764                 nic->mac_control.stats_info->sw_stat.mem_alloc_fail_cnt++;
5765                 return;
5766         }
5767         nic->mac_control.stats_info->sw_stat.mem_allocated += 256;
5768
5769         for (i = 0; i < 256; i +=4 ) {
5770                 pci_write_config_byte(nic->pdev, (vpd_addr + 2), i);
5771                 pci_read_config_byte(nic->pdev,  (vpd_addr + 2), &data);
5772                 pci_write_config_byte(nic->pdev, (vpd_addr + 3), 0);
5773                 for (cnt = 0; cnt <5; cnt++) {
5774                         msleep(2);
5775                         pci_read_config_byte(nic->pdev, (vpd_addr + 3), &data);
5776                         if (data == 0x80)
5777                                 break;
5778                 }
5779                 if (cnt >= 5) {
5780                         DBG_PRINT(ERR_DBG, "Read of VPD data failed\n");
5781                         fail = 1;
5782                         break;
5783                 }
5784                 pci_read_config_dword(nic->pdev,  (vpd_addr + 4),
5785                                       (u32 *)&vpd_data[i]);
5786         }
5787
5788         if(!fail) {
5789                 /* read serial number of adapter */
5790                 for (cnt = 0; cnt < 256; cnt++) {
5791                 if ((vpd_data[cnt] == 'S') &&
5792                         (vpd_data[cnt+1] == 'N') &&
5793                         (vpd_data[cnt+2] < VPD_STRING_LEN)) {
5794                                 memset(nic->serial_num, 0, VPD_STRING_LEN);
5795                                 memcpy(nic->serial_num, &vpd_data[cnt + 3],
5796                                         vpd_data[cnt+2]);
5797                                 break;
5798                         }
5799                 }
5800         }
5801
5802         if ((!fail) && (vpd_data[1] < VPD_STRING_LEN)) {
5803                 memset(nic->product_name, 0, vpd_data[1]);
5804                 memcpy(nic->product_name, &vpd_data[3], vpd_data[1]);
5805         }
5806         kfree(vpd_data);
5807         nic->mac_control.stats_info->sw_stat.mem_freed += 256;
5808 }
5809
5810 /**
5811  *  s2io_ethtool_geeprom  - reads the value stored in the Eeprom.
5812  *  @sp : private member of the device structure, which is a pointer to the *       s2io_nic structure.
5813  *  @eeprom : pointer to the user level structure provided by ethtool,
5814  *  containing all relevant information.
5815  *  @data_buf : user defined value to be written into Eeprom.
5816  *  Description: Reads the values stored in the Eeprom at given offset
5817  *  for a given length. Stores these values int the input argument data
5818  *  buffer 'data_buf' and returns these to the caller (ethtool.)
5819  *  Return value:
5820  *  int  0 on success
5821  */
5822
5823 static int s2io_ethtool_geeprom(struct net_device *dev,
5824                          struct ethtool_eeprom *eeprom, u8 * data_buf)
5825 {
5826         u32 i, valid;
5827         u64 data;
5828         struct s2io_nic *sp = dev->priv;
5829
5830         eeprom->magic = sp->pdev->vendor | (sp->pdev->device << 16);
5831
5832         if ((eeprom->offset + eeprom->len) > (XENA_EEPROM_SPACE))
5833                 eeprom->len = XENA_EEPROM_SPACE - eeprom->offset;
5834
5835         for (i = 0; i < eeprom->len; i += 4) {
5836                 if (read_eeprom(sp, (eeprom->offset + i), &data)) {
5837                         DBG_PRINT(ERR_DBG, "Read of EEPROM failed\n");
5838                         return -EFAULT;
5839                 }
5840                 valid = INV(data);
5841                 memcpy((data_buf + i), &valid, 4);
5842         }
5843         return 0;
5844 }
5845
5846 /**
5847  *  s2io_ethtool_seeprom - tries to write the user provided value in Eeprom
5848  *  @sp : private member of the device structure, which is a pointer to the
5849  *  s2io_nic structure.
5850  *  @eeprom : pointer to the user level structure provided by ethtool,
5851  *  containing all relevant information.
5852  *  @data_buf ; user defined value to be written into Eeprom.
5853  *  Description:
5854  *  Tries to write the user provided value in the Eeprom, at the offset
5855  *  given by the user.
5856  *  Return value:
5857  *  0 on success, -EFAULT on failure.
5858  */
5859
5860 static int s2io_ethtool_seeprom(struct net_device *dev,
5861                                 struct ethtool_eeprom *eeprom,
5862                                 u8 * data_buf)
5863 {
5864         int len = eeprom->len, cnt = 0;
5865         u64 valid = 0, data;
5866         struct s2io_nic *sp = dev->priv;
5867
5868         if (eeprom->magic != (sp->pdev->vendor | (sp->pdev->device << 16))) {
5869                 DBG_PRINT(ERR_DBG,
5870                           "ETHTOOL_WRITE_EEPROM Err: Magic value ");
5871                 DBG_PRINT(ERR_DBG, "is wrong, Its not 0x%x\n",
5872                           eeprom->magic);
5873                 return -EFAULT;
5874         }
5875
5876         while (len) {
5877                 data = (u32) data_buf[cnt] & 0x000000FF;
5878                 if (data) {
5879                         valid = (u32) (data << 24);
5880                 } else
5881                         valid = data;
5882
5883                 if (write_eeprom(sp, (eeprom->offset + cnt), valid, 0)) {
5884                         DBG_PRINT(ERR_DBG,
5885                                   "ETHTOOL_WRITE_EEPROM Err: Cannot ");
5886                         DBG_PRINT(ERR_DBG,
5887                                   "write into the specified offset\n");
5888                         return -EFAULT;
5889                 }
5890                 cnt++;
5891                 len--;
5892         }
5893
5894         return 0;
5895 }
5896
5897 /**
5898  * s2io_register_test - reads and writes into all clock domains.
5899  * @sp : private member of the device structure, which is a pointer to the
5900  * s2io_nic structure.
5901  * @data : variable that returns the result of each of the test conducted b
5902  * by the driver.
5903  * Description:
5904  * Read and write into all clock domains. The NIC has 3 clock domains,
5905  * see that registers in all the three regions are accessible.
5906  * Return value:
5907  * 0 on success.
5908  */
5909
5910 static int s2io_register_test(struct s2io_nic * sp, uint64_t * data)
5911 {
5912         struct XENA_dev_config __iomem *bar0 = sp->bar0;
5913         u64 val64 = 0, exp_val;
5914         int fail = 0;
5915
5916         val64 = readq(&bar0->pif_rd_swapper_fb);
5917         if (val64 != 0x123456789abcdefULL) {
5918                 fail = 1;
5919                 DBG_PRINT(INFO_DBG, "Read Test level 1 fails\n");
5920         }
5921
5922         val64 = readq(&bar0->rmac_pause_cfg);
5923         if (val64 != 0xc000ffff00000000ULL) {
5924                 fail = 1;
5925                 DBG_PRINT(INFO_DBG, "Read Test level 2 fails\n");
5926         }
5927
5928         val64 = readq(&bar0->rx_queue_cfg);
5929         if (sp->device_type == XFRAME_II_DEVICE)
5930                 exp_val = 0x0404040404040404ULL;
5931         else
5932                 exp_val = 0x0808080808080808ULL;
5933         if (val64 != exp_val) {
5934                 fail = 1;
5935                 DBG_PRINT(INFO_DBG, "Read Test level 3 fails\n");
5936         }
5937
5938         val64 = readq(&bar0->xgxs_efifo_cfg);
5939         if (val64 != 0x000000001923141EULL) {
5940                 fail = 1;
5941                 DBG_PRINT(INFO_DBG, "Read Test level 4 fails\n");
5942         }
5943
5944         val64 = 0x5A5A5A5A5A5A5A5AULL;
5945         writeq(val64, &bar0->xmsi_data);
5946         val64 = readq(&bar0->xmsi_data);
5947         if (val64 != 0x5A5A5A5A5A5A5A5AULL) {
5948                 fail = 1;
5949                 DBG_PRINT(ERR_DBG, "Write Test level 1 fails\n");
5950         }
5951
5952         val64 = 0xA5A5A5A5A5A5A5A5ULL;
5953         writeq(val64, &bar0->xmsi_data);
5954         val64 = readq(&bar0->xmsi_data);
5955         if (val64 != 0xA5A5A5A5A5A5A5A5ULL) {
5956                 fail = 1;
5957                 DBG_PRINT(ERR_DBG, "Write Test level 2 fails\n");
5958         }
5959
5960         *data = fail;
5961         return fail;
5962 }
5963
5964 /**
5965  * s2io_eeprom_test - to verify that EEprom in the xena can be programmed.
5966  * @sp : private member of the device structure, which is a pointer to the
5967  * s2io_nic structure.
5968  * @data:variable that returns the result of each of the test conducted by
5969  * the driver.
5970  * Description:
5971  * Verify that EEPROM in the xena can be programmed using I2C_CONTROL
5972  * register.
5973  * Return value:
5974  * 0 on success.
5975  */
5976
5977 static int s2io_eeprom_test(struct s2io_nic * sp, uint64_t * data)
5978 {
5979         int fail = 0;
5980         u64 ret_data, org_4F0, org_7F0;
5981         u8 saved_4F0 = 0, saved_7F0 = 0;
5982         struct net_device *dev = sp->dev;
5983
5984         /* Test Write Error at offset 0 */
5985         /* Note that SPI interface allows write access to all areas
5986          * of EEPROM. Hence doing all negative testing only for Xframe I.
5987          */
5988         if (sp->device_type == XFRAME_I_DEVICE)
5989                 if (!write_eeprom(sp, 0, 0, 3))
5990                         fail = 1;
5991
5992         /* Save current values at offsets 0x4F0 and 0x7F0 */
5993         if (!read_eeprom(sp, 0x4F0, &org_4F0))
5994                 saved_4F0 = 1;
5995         if (!read_eeprom(sp, 0x7F0, &org_7F0))
5996                 saved_7F0 = 1;
5997
5998         /* Test Write at offset 4f0 */
5999         if (write_eeprom(sp, 0x4F0, 0x012345, 3))
6000                 fail = 1;
6001         if (read_eeprom(sp, 0x4F0, &ret_data))
6002                 fail = 1;
6003
6004         if (ret_data != 0x012345) {
6005                 DBG_PRINT(ERR_DBG, "%s: eeprom test error at offset 0x4F0. "
6006                         "Data written %llx Data read %llx\n",
6007                         dev->name, (unsigned long long)0x12345,
6008                         (unsigned long long)ret_data);
6009                 fail = 1;
6010         }
6011
6012         /* Reset the EEPROM data go FFFF */
6013         write_eeprom(sp, 0x4F0, 0xFFFFFF, 3);
6014
6015         /* Test Write Request Error at offset 0x7c */
6016         if (sp->device_type == XFRAME_I_DEVICE)
6017                 if (!write_eeprom(sp, 0x07C, 0, 3))
6018                         fail = 1;
6019
6020         /* Test Write Request at offset 0x7f0 */
6021         if (write_eeprom(sp, 0x7F0, 0x012345, 3))
6022                 fail = 1;
6023         if (read_eeprom(sp, 0x7F0, &ret_data))
6024                 fail = 1;
6025
6026         if (ret_data != 0x012345) {
6027                 DBG_PRINT(ERR_DBG, "%s: eeprom test error at offset 0x7F0. "
6028                         "Data written %llx Data read %llx\n",
6029                         dev->name, (unsigned long long)0x12345,
6030                         (unsigned long long)ret_data);
6031                 fail = 1;
6032         }
6033
6034         /* Reset the EEPROM data go FFFF */
6035         write_eeprom(sp, 0x7F0, 0xFFFFFF, 3);
6036
6037         if (sp->device_type == XFRAME_I_DEVICE) {
6038                 /* Test Write Error at offset 0x80 */
6039                 if (!write_eeprom(sp, 0x080, 0, 3))
6040                         fail = 1;
6041
6042                 /* Test Write Error at offset 0xfc */
6043                 if (!write_eeprom(sp, 0x0FC, 0, 3))
6044                         fail = 1;
6045
6046                 /* Test Write Error at offset 0x100 */
6047                 if (!write_eeprom(sp, 0x100, 0, 3))
6048                         fail = 1;
6049
6050                 /* Test Write Error at offset 4ec */
6051                 if (!write_eeprom(sp, 0x4EC, 0, 3))
6052                         fail = 1;
6053         }
6054
6055         /* Restore values at offsets 0x4F0 and 0x7F0 */
6056         if (saved_4F0)
6057                 write_eeprom(sp, 0x4F0, org_4F0, 3);
6058         if (saved_7F0)
6059                 write_eeprom(sp, 0x7F0, org_7F0, 3);
6060
6061         *data = fail;
6062         return fail;
6063 }
6064
6065 /**
6066  * s2io_bist_test - invokes the MemBist test of the card .
6067  * @sp : private member of the device structure, which is a pointer to the
6068  * s2io_nic structure.
6069  * @data:variable that returns the result of each of the test conducted by
6070  * the driver.
6071  * Description:
6072  * This invokes the MemBist test of the card. We give around
6073  * 2 secs time for the Test to complete. If it's still not complete
6074  * within this peiod, we consider that the test failed.
6075  * Return value:
6076  * 0 on success and -1 on failure.
6077  */
6078
6079 static int s2io_bist_test(struct s2io_nic * sp, uint64_t * data)
6080 {
6081         u8 bist = 0;
6082         int cnt = 0, ret = -1;
6083
6084         pci_read_config_byte(sp->pdev, PCI_BIST, &bist);
6085         bist |= PCI_BIST_START;
6086         pci_write_config_word(sp->pdev, PCI_BIST, bist);
6087
6088         while (cnt < 20) {
6089                 pci_read_config_byte(sp->pdev, PCI_BIST, &bist);
6090                 if (!(bist & PCI_BIST_START)) {
6091                         *data = (bist & PCI_BIST_CODE_MASK);
6092                         ret = 0;
6093                         break;
6094                 }
6095                 msleep(100);
6096                 cnt++;
6097         }
6098
6099         return ret;
6100 }
6101
6102 /**
6103  * s2io-link_test - verifies the link state of the nic
6104  * @sp ; private member of the device structure, which is a pointer to the
6105  * s2io_nic structure.
6106  * @data: variable that returns the result of each of the test conducted by
6107  * the driver.
6108  * Description:
6109  * The function verifies the link state of the NIC and updates the input
6110  * argument 'data' appropriately.
6111  * Return value:
6112  * 0 on success.
6113  */
6114
6115 static int s2io_link_test(struct s2io_nic * sp, uint64_t * data)
6116 {
6117         struct XENA_dev_config __iomem *bar0 = sp->bar0;
6118         u64 val64;
6119
6120         val64 = readq(&bar0->adapter_status);
6121         if(!(LINK_IS_UP(val64)))
6122                 *data = 1;
6123         else
6124                 *data = 0;
6125
6126         return *data;
6127 }
6128
6129 /**
6130  * s2io_rldram_test - offline test for access to the RldRam chip on the NIC
6131  * @sp - private member of the device structure, which is a pointer to the
6132  * s2io_nic structure.
6133  * @data - variable that returns the result of each of the test
6134  * conducted by the driver.
6135  * Description:
6136  *  This is one of the offline test that tests the read and write
6137  *  access to the RldRam chip on the NIC.
6138  * Return value:
6139  *  0 on success.
6140  */
6141
6142 static int s2io_rldram_test(struct s2io_nic * sp, uint64_t * data)
6143 {
6144         struct XENA_dev_config __iomem *bar0 = sp->bar0;
6145         u64 val64;
6146         int cnt, iteration = 0, test_fail = 0;
6147
6148         val64 = readq(&bar0->adapter_control);
6149         val64 &= ~ADAPTER_ECC_EN;
6150         writeq(val64, &bar0->adapter_control);
6151
6152         val64 = readq(&bar0->mc_rldram_test_ctrl);
6153         val64 |= MC_RLDRAM_TEST_MODE;
6154         SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_test_ctrl, LF);
6155
6156         val64 = readq(&bar0->mc_rldram_mrs);
6157         val64 |= MC_RLDRAM_QUEUE_SIZE_ENABLE;
6158         SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_mrs, UF);
6159
6160         val64 |= MC_RLDRAM_MRS_ENABLE;
6161         SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_mrs, UF);
6162
6163         while (iteration < 2) {
6164                 val64 = 0x55555555aaaa0000ULL;
6165                 if (iteration == 1) {
6166                         val64 ^= 0xFFFFFFFFFFFF0000ULL;
6167                 }
6168                 writeq(val64, &bar0->mc_rldram_test_d0);
6169
6170                 val64 = 0xaaaa5a5555550000ULL;
6171                 if (iteration == 1) {
6172                         val64 ^= 0xFFFFFFFFFFFF0000ULL;
6173                 }
6174                 writeq(val64, &bar0->mc_rldram_test_d1);
6175
6176                 val64 = 0x55aaaaaaaa5a0000ULL;
6177                 if (iteration == 1) {
6178                         val64 ^= 0xFFFFFFFFFFFF0000ULL;
6179                 }
6180                 writeq(val64, &bar0->mc_rldram_test_d2);
6181
6182                 val64 = (u64) (0x0000003ffffe0100ULL);
6183                 writeq(val64, &bar0->mc_rldram_test_add);
6184
6185                 val64 = MC_RLDRAM_TEST_MODE | MC_RLDRAM_TEST_WRITE |
6186                         MC_RLDRAM_TEST_GO;
6187                 SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_test_ctrl, LF);
6188
6189                 for (cnt = 0; cnt < 5; cnt++) {
6190                         val64 = readq(&bar0->mc_rldram_test_ctrl);
6191                         if (val64 & MC_RLDRAM_TEST_DONE)
6192                                 break;
6193                         msleep(200);
6194                 }
6195
6196                 if (cnt == 5)
6197                         break;
6198
6199                 val64 = MC_RLDRAM_TEST_MODE | MC_RLDRAM_TEST_GO;
6200                 SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_test_ctrl, LF);
6201
6202                 for (cnt = 0; cnt < 5; cnt++) {
6203                         val64 = readq(&bar0->mc_rldram_test_ctrl);
6204                         if (val64 & MC_RLDRAM_TEST_DONE)
6205                                 break;
6206                         msleep(500);
6207                 }
6208
6209                 if (cnt == 5)
6210                         break;
6211
6212                 val64 = readq(&bar0->mc_rldram_test_ctrl);
6213                 if (!(val64 & MC_RLDRAM_TEST_PASS))
6214                         test_fail = 1;
6215
6216                 iteration++;
6217         }
6218
6219         *data = test_fail;
6220
6221         /* Bring the adapter out of test mode */
6222         SPECIAL_REG_WRITE(0, &bar0->mc_rldram_test_ctrl, LF);
6223
6224         return test_fail;
6225 }
6226
6227 /**
6228  *  s2io_ethtool_test - conducts 6 tsets to determine the health of card.
6229  *  @sp : private member of the device structure, which is a pointer to the
6230  *  s2io_nic structure.
6231  *  @ethtest : pointer to a ethtool command specific structure that will be
6232  *  returned to the user.
6233  *  @data : variable that returns the result of each of the test
6234  * conducted by the driver.
6235  * Description:
6236  *  This function conducts 6 tests ( 4 offline and 2 online) to determine
6237  *  the health of the card.
6238  * Return value:
6239  *  void
6240  */
6241
6242 static void s2io_ethtool_test(struct net_device *dev,
6243                               struct ethtool_test *ethtest,
6244                               uint64_t * data)
6245 {
6246         struct s2io_nic *sp = dev->priv;
6247         int orig_state = netif_running(sp->dev);
6248
6249         if (ethtest->flags == ETH_TEST_FL_OFFLINE) {
6250                 /* Offline Tests. */
6251                 if (orig_state)
6252                         s2io_close(sp->dev);
6253
6254                 if (s2io_register_test(sp, &data[0]))
6255                         ethtest->flags |= ETH_TEST_FL_FAILED;
6256
6257                 s2io_reset(sp);
6258
6259                 if (s2io_rldram_test(sp, &data[3]))
6260                         ethtest->flags |= ETH_TEST_FL_FAILED;
6261
6262                 s2io_reset(sp);
6263
6264                 if (s2io_eeprom_test(sp, &data[1]))
6265                         ethtest->flags |= ETH_TEST_FL_FAILED;
6266
6267                 if (s2io_bist_test(sp, &data[4]))
6268                         ethtest->flags |= ETH_TEST_FL_FAILED;
6269
6270                 if (orig_state)
6271                         s2io_open(sp->dev);
6272
6273                 data[2] = 0;
6274         } else {
6275                 /* Online Tests. */
6276                 if (!orig_state) {
6277                         DBG_PRINT(ERR_DBG,
6278                                   "%s: is not up, cannot run test\n",
6279                                   dev->name);
6280                         data[0] = -1;
6281                         data[1] = -1;
6282                         data[2] = -1;
6283                         data[3] = -1;
6284                         data[4] = -1;
6285                 }
6286
6287                 if (s2io_link_test(sp, &data[2]))
6288                         ethtest->flags |= ETH_TEST_FL_FAILED;
6289
6290                 data[0] = 0;
6291                 data[1] = 0;
6292                 data[3] = 0;
6293                 data[4] = 0;
6294         }
6295 }
6296
6297 static void s2io_get_ethtool_stats(struct net_device *dev,
6298                                    struct ethtool_stats *estats,
6299                                    u64 * tmp_stats)
6300 {
6301         int i = 0, k;
6302         struct s2io_nic *sp = dev->priv;
6303         struct stat_block *stat_info = sp->mac_control.stats_info;
6304
6305         s2io_updt_stats(sp);
6306         tmp_stats[i++] =
6307                 (u64)le32_to_cpu(stat_info->tmac_frms_oflow) << 32  |
6308                 le32_to_cpu(stat_info->tmac_frms);
6309         tmp_stats[i++] =
6310                 (u64)le32_to_cpu(stat_info->tmac_data_octets_oflow) << 32 |
6311                 le32_to_cpu(stat_info->tmac_data_octets);
6312         tmp_stats[i++] = le64_to_cpu(stat_info->tmac_drop_frms);
6313         tmp_stats[i++] =
6314                 (u64)le32_to_cpu(stat_info->tmac_mcst_frms_oflow) << 32 |
6315                 le32_to_cpu(stat_info->tmac_mcst_frms);
6316         tmp_stats[i++] =
6317                 (u64)le32_to_cpu(stat_info->tmac_bcst_frms_oflow) << 32 |
6318                 le32_to_cpu(stat_info->tmac_bcst_frms);
6319         tmp_stats[i++] = le64_to_cpu(stat_info->tmac_pause_ctrl_frms);
6320         tmp_stats[i++] =
6321                 (u64)le32_to_cpu(stat_info->tmac_ttl_octets_oflow) << 32 |
6322                 le32_to_cpu(stat_info->tmac_ttl_octets);
6323         tmp_stats[i++] =
6324                 (u64)le32_to_cpu(stat_info->tmac_ucst_frms_oflow) << 32 |
6325                 le32_to_cpu(stat_info->tmac_ucst_frms);
6326         tmp_stats[i++] =
6327                 (u64)le32_to_cpu(stat_info->tmac_nucst_frms_oflow) << 32 |
6328                 le32_to_cpu(stat_info->tmac_nucst_frms);
6329         tmp_stats[i++] =
6330                 (u64)le32_to_cpu(stat_info->tmac_any_err_frms_oflow) << 32 |
6331                 le32_to_cpu(stat_info->tmac_any_err_frms);
6332         tmp_stats[i++] = le64_to_cpu(stat_info->tmac_ttl_less_fb_octets);
6333         tmp_stats[i++] = le64_to_cpu(stat_info->tmac_vld_ip_octets);
6334         tmp_stats[i++] =
6335                 (u64)le32_to_cpu(stat_info->tmac_vld_ip_oflow) << 32 |
6336                 le32_to_cpu(stat_info->tmac_vld_ip);
6337         tmp_stats[i++] =
6338                 (u64)le32_to_cpu(stat_info->tmac_drop_ip_oflow) << 32 |
6339                 le32_to_cpu(stat_info->tmac_drop_ip);
6340         tmp_stats[i++] =
6341                 (u64)le32_to_cpu(stat_info->tmac_icmp_oflow) << 32 |
6342                 le32_to_cpu(stat_info->tmac_icmp);
6343         tmp_stats[i++] =
6344                 (u64)le32_to_cpu(stat_info->tmac_rst_tcp_oflow) << 32 |
6345                 le32_to_cpu(stat_info->tmac_rst_tcp);
6346         tmp_stats[i++] = le64_to_cpu(stat_info->tmac_tcp);
6347         tmp_stats[i++] = (u64)le32_to_cpu(stat_info->tmac_udp_oflow) << 32 |
6348                 le32_to_cpu(stat_info->tmac_udp);
6349         tmp_stats[i++] =
6350                 (u64)le32_to_cpu(stat_info->rmac_vld_frms_oflow) << 32 |
6351                 le32_to_cpu(stat_info->rmac_vld_frms);
6352         tmp_stats[i++] =
6353                 (u64)le32_to_cpu(stat_info->rmac_data_octets_oflow) << 32 |
6354                 le32_to_cpu(stat_info->rmac_data_octets);
6355         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_fcs_err_frms);
6356         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_drop_frms);
6357         tmp_stats[i++] =
6358                 (u64)le32_to_cpu(stat_info->rmac_vld_mcst_frms_oflow) << 32 |
6359                 le32_to_cpu(stat_info->rmac_vld_mcst_frms);
6360         tmp_stats[i++] =
6361                 (u64)le32_to_cpu(stat_info->rmac_vld_bcst_frms_oflow) << 32 |
6362                 le32_to_cpu(stat_info->rmac_vld_bcst_frms);
6363         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_in_rng_len_err_frms);
6364         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_out_rng_len_err_frms);
6365         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_long_frms);
6366         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_pause_ctrl_frms);
6367         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_unsup_ctrl_frms);
6368         tmp_stats[i++] =
6369                 (u64)le32_to_cpu(stat_info->rmac_ttl_octets_oflow) << 32 |
6370                 le32_to_cpu(stat_info->rmac_ttl_octets);
6371         tmp_stats[i++] =
6372                 (u64)le32_to_cpu(stat_info->rmac_accepted_ucst_frms_oflow)
6373                 << 32 | le32_to_cpu(stat_info->rmac_accepted_ucst_frms);
6374         tmp_stats[i++] =
6375                 (u64)le32_to_cpu(stat_info->rmac_accepted_nucst_frms_oflow)
6376                  << 32 | le32_to_cpu(stat_info->rmac_accepted_nucst_frms);
6377         tmp_stats[i++] =
6378                 (u64)le32_to_cpu(stat_info->rmac_discarded_frms_oflow) << 32 |
6379                 le32_to_cpu(stat_info->rmac_discarded_frms);
6380         tmp_stats[i++] =
6381                 (u64)le32_to_cpu(stat_info->rmac_drop_events_oflow)
6382                  << 32 | le32_to_cpu(stat_info->rmac_drop_events);
6383         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_less_fb_octets);
6384         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_frms);
6385         tmp_stats[i++] =
6386                 (u64)le32_to_cpu(stat_info->rmac_usized_frms_oflow) << 32 |
6387                 le32_to_cpu(stat_info->rmac_usized_frms);
6388         tmp_stats[i++] =
6389                 (u64)le32_to_cpu(stat_info->rmac_osized_frms_oflow) << 32 |
6390                 le32_to_cpu(stat_info->rmac_osized_frms);
6391         tmp_stats[i++] =
6392                 (u64)le32_to_cpu(stat_info->rmac_frag_frms_oflow) << 32 |
6393                 le32_to_cpu(stat_info->rmac_frag_frms);
6394         tmp_stats[i++] =
6395                 (u64)le32_to_cpu(stat_info->rmac_jabber_frms_oflow) << 32 |
6396                 le32_to_cpu(stat_info->rmac_jabber_frms);
6397         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_64_frms);
6398         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_65_127_frms);
6399         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_128_255_frms);
6400         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_256_511_frms);
6401         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_512_1023_frms);
6402         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_1024_1518_frms);
6403         tmp_stats[i++] =
6404                 (u64)le32_to_cpu(stat_info->rmac_ip_oflow) << 32 |
6405                 le32_to_cpu(stat_info->rmac_ip);
6406         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ip_octets);
6407         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_hdr_err_ip);
6408         tmp_stats[i++] =
6409                 (u64)le32_to_cpu(stat_info->rmac_drop_ip_oflow) << 32 |
6410                 le32_to_cpu(stat_info->rmac_drop_ip);
6411         tmp_stats[i++] =
6412                 (u64)le32_to_cpu(stat_info->rmac_icmp_oflow) << 32 |
6413                 le32_to_cpu(stat_info->rmac_icmp);
6414         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_tcp);
6415         tmp_stats[i++] =
6416                 (u64)le32_to_cpu(stat_info->rmac_udp_oflow) << 32 |
6417                 le32_to_cpu(stat_info->rmac_udp);
6418         tmp_stats[i++] =
6419                 (u64)le32_to_cpu(stat_info->rmac_err_drp_udp_oflow) << 32 |
6420                 le32_to_cpu(stat_info->rmac_err_drp_udp);
6421         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_xgmii_err_sym);
6422         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q0);
6423         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q1);
6424         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q2);
6425         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q3);
6426         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q4);
6427         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q5);
6428         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q6);
6429         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_frms_q7);
6430         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q0);
6431         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q1);
6432         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q2);
6433         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q3);
6434         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q4);
6435         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q5);
6436         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q6);
6437         tmp_stats[i++] = le16_to_cpu(stat_info->rmac_full_q7);
6438         tmp_stats[i++] =
6439                 (u64)le32_to_cpu(stat_info->rmac_pause_cnt_oflow) << 32 |
6440                 le32_to_cpu(stat_info->rmac_pause_cnt);
6441         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_xgmii_data_err_cnt);
6442         tmp_stats[i++] = le64_to_cpu(stat_info->rmac_xgmii_ctrl_err_cnt);
6443         tmp_stats[i++] =
6444                 (u64)le32_to_cpu(stat_info->rmac_accepted_ip_oflow) << 32 |
6445                 le32_to_cpu(stat_info->rmac_accepted_ip);
6446         tmp_stats[i++] = le32_to_cpu(stat_info->rmac_err_tcp);
6447         tmp_stats[i++] = le32_to_cpu(stat_info->rd_req_cnt);
6448         tmp_stats[i++] = le32_to_cpu(stat_info->new_rd_req_cnt);
6449         tmp_stats[i++] = le32_to_cpu(stat_info->new_rd_req_rtry_cnt);
6450         tmp_stats[i++] = le32_to_cpu(stat_info->rd_rtry_cnt);
6451         tmp_stats[i++] = le32_to_cpu(stat_info->wr_rtry_rd_ack_cnt);
6452         tmp_stats[i++] = le32_to_cpu(stat_info->wr_req_cnt);
6453         tmp_stats[i++] = le32_to_cpu(stat_info->new_wr_req_cnt);
6454         tmp_stats[i++] = le32_to_cpu(stat_info->new_wr_req_rtry_cnt);
6455         tmp_stats[i++] = le32_to_cpu(stat_info->wr_rtry_cnt);
6456         tmp_stats[i++] = le32_to_cpu(stat_info->wr_disc_cnt);
6457         tmp_stats[i++] = le32_to_cpu(stat_info->rd_rtry_wr_ack_cnt);
6458         tmp_stats[i++] = le32_to_cpu(stat_info->txp_wr_cnt);
6459         tmp_stats[i++] = le32_to_cpu(stat_info->txd_rd_cnt);
6460         tmp_stats[i++] = le32_to_cpu(stat_info->txd_wr_cnt);
6461         tmp_stats[i++] = le32_to_cpu(stat_info->rxd_rd_cnt);
6462         tmp_stats[i++] = le32_to_cpu(stat_info->rxd_wr_cnt);
6463         tmp_stats[i++] = le32_to_cpu(stat_info->txf_rd_cnt);
6464         tmp_stats[i++] = le32_to_cpu(stat_info->rxf_wr_cnt);
6465
6466         /* Enhanced statistics exist only for Hercules */
6467         if(sp->device_type == XFRAME_II_DEVICE) {
6468                 tmp_stats[i++] =
6469                                 le64_to_cpu(stat_info->rmac_ttl_1519_4095_frms);
6470                 tmp_stats[i++] =
6471                                 le64_to_cpu(stat_info->rmac_ttl_4096_8191_frms);
6472                 tmp_stats[i++] =
6473                                 le64_to_cpu(stat_info->rmac_ttl_8192_max_frms);
6474                 tmp_stats[i++] = le64_to_cpu(stat_info->rmac_ttl_gt_max_frms);
6475                 tmp_stats[i++] = le64_to_cpu(stat_info->rmac_osized_alt_frms);
6476                 tmp_stats[i++] = le64_to_cpu(stat_info->rmac_jabber_alt_frms);
6477                 tmp_stats[i++] = le64_to_cpu(stat_info->rmac_gt_max_alt_frms);
6478                 tmp_stats[i++] = le64_to_cpu(stat_info->rmac_vlan_frms);
6479                 tmp_stats[i++] = le32_to_cpu(stat_info->rmac_len_discard);
6480                 tmp_stats[i++] = le32_to_cpu(stat_info->rmac_fcs_discard);
6481                 tmp_stats[i++] = le32_to_cpu(stat_info->rmac_pf_discard);
6482                 tmp_stats[i++] = le32_to_cpu(stat_info->rmac_da_discard);
6483                 tmp_stats[i++] = le32_to_cpu(stat_info->rmac_red_discard);
6484                 tmp_stats[i++] = le32_to_cpu(stat_info->rmac_rts_discard);
6485                 tmp_stats[i++] = le32_to_cpu(stat_info->rmac_ingm_full_discard);
6486                 tmp_stats[i++] = le32_to_cpu(stat_info->link_fault_cnt);
6487         }
6488
6489         tmp_stats[i++] = 0;
6490         tmp_stats[i++] = stat_info->sw_stat.single_ecc_errs;
6491         tmp_stats[i++] = stat_info->sw_stat.double_ecc_errs;
6492         tmp_stats[i++] = stat_info->sw_stat.parity_err_cnt;
6493         tmp_stats[i++] = stat_info->sw_stat.serious_err_cnt;
6494         tmp_stats[i++] = stat_info->sw_stat.soft_reset_cnt;
6495         tmp_stats[i++] = stat_info->sw_stat.fifo_full_cnt;
6496         for (k = 0; k < MAX_RX_RINGS; k++)
6497                 tmp_stats[i++] = stat_info->sw_stat.ring_full_cnt[k];
6498         tmp_stats[i++] = stat_info->xpak_stat.alarm_transceiver_temp_high;
6499         tmp_stats[i++] = stat_info->xpak_stat.alarm_transceiver_temp_low;
6500         tmp_stats[i++] = stat_info->xpak_stat.alarm_laser_bias_current_high;
6501         tmp_stats[i++] = stat_info->xpak_stat.alarm_laser_bias_current_low;
6502         tmp_stats[i++] = stat_info->xpak_stat.alarm_laser_output_power_high;
6503         tmp_stats[i++] = stat_info->xpak_stat.alarm_laser_output_power_low;
6504         tmp_stats[i++] = stat_info->xpak_stat.warn_transceiver_temp_high;
6505         tmp_stats[i++] = stat_info->xpak_stat.warn_transceiver_temp_low;
6506         tmp_stats[i++] = stat_info->xpak_stat.warn_laser_bias_current_high;
6507         tmp_stats[i++] = stat_info->xpak_stat.warn_laser_bias_current_low;
6508         tmp_stats[i++] = stat_info->xpak_stat.warn_laser_output_power_high;
6509         tmp_stats[i++] = stat_info->xpak_stat.warn_laser_output_power_low;
6510         tmp_stats[i++] = stat_info->sw_stat.clubbed_frms_cnt;
6511         tmp_stats[i++] = stat_info->sw_stat.sending_both;
6512         tmp_stats[i++] = stat_info->sw_stat.outof_sequence_pkts;
6513         tmp_stats[i++] = stat_info->sw_stat.flush_max_pkts;
6514         if (stat_info->sw_stat.num_aggregations) {
6515                 u64 tmp = stat_info->sw_stat.sum_avg_pkts_aggregated;
6516                 int count = 0;
6517                 /*
6518                  * Since 64-bit divide does not work on all platforms,
6519                  * do repeated subtraction.
6520                  */
6521                 while (tmp >= stat_info->sw_stat.num_aggregations) {
6522                         tmp -= stat_info->sw_stat.num_aggregations;
6523                         count++;
6524                 }
6525                 tmp_stats[i++] = count;
6526         }
6527         else
6528                 tmp_stats[i++] = 0;
6529         tmp_stats[i++] = stat_info->sw_stat.mem_alloc_fail_cnt;
6530         tmp_stats[i++] = stat_info->sw_stat.pci_map_fail_cnt;
6531         tmp_stats[i++] = stat_info->sw_stat.watchdog_timer_cnt;
6532         tmp_stats[i++] = stat_info->sw_stat.mem_allocated;
6533         tmp_stats[i++] = stat_info->sw_stat.mem_freed;
6534         tmp_stats[i++] = stat_info->sw_stat.link_up_cnt;
6535         tmp_stats[i++] = stat_info->sw_stat.link_down_cnt;
6536         tmp_stats[i++] = stat_info->sw_stat.link_up_time;
6537         tmp_stats[i++] = stat_info->sw_stat.link_down_time;
6538
6539         tmp_stats[i++] = stat_info->sw_stat.tx_buf_abort_cnt;
6540         tmp_stats[i++] = stat_info->sw_stat.tx_desc_abort_cnt;
6541         tmp_stats[i++] = stat_info->sw_stat.tx_parity_err_cnt;
6542         tmp_stats[i++] = stat_info->sw_stat.tx_link_loss_cnt;
6543         tmp_stats[i++] = stat_info->sw_stat.tx_list_proc_err_cnt;
6544
6545         tmp_stats[i++] = stat_info->sw_stat.rx_parity_err_cnt;
6546         tmp_stats[i++] = stat_info->sw_stat.rx_abort_cnt;
6547         tmp_stats[i++] = stat_info->sw_stat.rx_parity_abort_cnt;
6548         tmp_stats[i++] = stat_info->sw_stat.rx_rda_fail_cnt;
6549         tmp_stats[i++] = stat_info->sw_stat.rx_unkn_prot_cnt;
6550         tmp_stats[i++] = stat_info->sw_stat.rx_fcs_err_cnt;
6551         tmp_stats[i++] = stat_info->sw_stat.rx_buf_size_err_cnt;
6552         tmp_stats[i++] = stat_info->sw_stat.rx_rxd_corrupt_cnt;
6553         tmp_stats[i++] = stat_info->sw_stat.rx_unkn_err_cnt;
6554         tmp_stats[i++] = stat_info->sw_stat.tda_err_cnt;
6555         tmp_stats[i++] = stat_info->sw_stat.pfc_err_cnt;
6556         tmp_stats[i++] = stat_info->sw_stat.pcc_err_cnt;
6557         tmp_stats[i++] = stat_info->sw_stat.tti_err_cnt;
6558         tmp_stats[i++] = stat_info->sw_stat.tpa_err_cnt;
6559         tmp_stats[i++] = stat_info->sw_stat.sm_err_cnt;
6560         tmp_stats[i++] = stat_info->sw_stat.lso_err_cnt;
6561         tmp_stats[i++] = stat_info->sw_stat.mac_tmac_err_cnt;
6562         tmp_stats[i++] = stat_info->sw_stat.mac_rmac_err_cnt;
6563         tmp_stats[i++] = stat_info->sw_stat.xgxs_txgxs_err_cnt;
6564         tmp_stats[i++] = stat_info->sw_stat.xgxs_rxgxs_err_cnt;
6565         tmp_stats[i++] = stat_info->sw_stat.rc_err_cnt;
6566         tmp_stats[i++] = stat_info->sw_stat.prc_pcix_err_cnt;
6567         tmp_stats[i++] = stat_info->sw_stat.rpa_err_cnt;
6568         tmp_stats[i++] = stat_info->sw_stat.rda_err_cnt;
6569         tmp_stats[i++] = stat_info->sw_stat.rti_err_cnt;
6570         tmp_stats[i++] = stat_info->sw_stat.mc_err_cnt;
6571 }
6572
6573 static int s2io_ethtool_get_regs_len(struct net_device *dev)
6574 {
6575         return (XENA_REG_SPACE);
6576 }
6577
6578
6579 static u32 s2io_ethtool_get_rx_csum(struct net_device * dev)
6580 {
6581         struct s2io_nic *sp = dev->priv;
6582
6583         return (sp->rx_csum);
6584 }
6585
6586 static int s2io_ethtool_set_rx_csum(struct net_device *dev, u32 data)
6587 {
6588         struct s2io_nic *sp = dev->priv;
6589
6590         if (data)
6591                 sp->rx_csum = 1;
6592         else
6593                 sp->rx_csum = 0;
6594
6595         return 0;
6596 }
6597
6598 static int s2io_get_eeprom_len(struct net_device *dev)
6599 {
6600         return (XENA_EEPROM_SPACE);
6601 }
6602
6603 static int s2io_get_sset_count(struct net_device *dev, int sset)
6604 {
6605         struct s2io_nic *sp = dev->priv;
6606
6607         switch (sset) {
6608         case ETH_SS_TEST:
6609                 return S2IO_TEST_LEN;
6610         case ETH_SS_STATS:
6611                 switch(sp->device_type) {
6612                 case XFRAME_I_DEVICE:
6613                         return XFRAME_I_STAT_LEN;
6614                 case XFRAME_II_DEVICE:
6615                         return XFRAME_II_STAT_LEN;
6616                 default:
6617                         return 0;
6618                 }
6619         default:
6620                 return -EOPNOTSUPP;
6621         }
6622 }
6623
6624 static void s2io_ethtool_get_strings(struct net_device *dev,
6625                                      u32 stringset, u8 * data)
6626 {
6627         int stat_size = 0;
6628         struct s2io_nic *sp = dev->priv;
6629
6630         switch (stringset) {
6631         case ETH_SS_TEST:
6632                 memcpy(data, s2io_gstrings, S2IO_STRINGS_LEN);
6633                 break;
6634         case ETH_SS_STATS:
6635                 stat_size = sizeof(ethtool_xena_stats_keys);
6636                 memcpy(data, &ethtool_xena_stats_keys,stat_size);
6637                 if(sp->device_type == XFRAME_II_DEVICE) {
6638                         memcpy(data + stat_size,
6639                                 &ethtool_enhanced_stats_keys,
6640                                 sizeof(ethtool_enhanced_stats_keys));
6641                         stat_size += sizeof(ethtool_enhanced_stats_keys);
6642                 }
6643
6644                 memcpy(data + stat_size, &ethtool_driver_stats_keys,
6645                         sizeof(ethtool_driver_stats_keys));
6646         }
6647 }
6648
6649 static int s2io_ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
6650 {
6651         if (data)
6652                 dev->features |= NETIF_F_IP_CSUM;
6653         else
6654                 dev->features &= ~NETIF_F_IP_CSUM;
6655
6656         return 0;
6657 }
6658
6659 static u32 s2io_ethtool_op_get_tso(struct net_device *dev)
6660 {
6661         return (dev->features & NETIF_F_TSO) != 0;
6662 }
6663 static int s2io_ethtool_op_set_tso(struct net_device *dev, u32 data)
6664 {
6665         if (data)
6666                 dev->features |= (NETIF_F_TSO | NETIF_F_TSO6);
6667         else
6668                 dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
6669
6670         return 0;
6671 }
6672
6673 static const struct ethtool_ops netdev_ethtool_ops = {
6674         .get_settings = s2io_ethtool_gset,
6675         .set_settings = s2io_ethtool_sset,
6676         .get_drvinfo = s2io_ethtool_gdrvinfo,
6677         .get_regs_len = s2io_ethtool_get_regs_len,
6678         .get_regs = s2io_ethtool_gregs,
6679         .get_link = ethtool_op_get_link,
6680         .get_eeprom_len = s2io_get_eeprom_len,
6681         .get_eeprom = s2io_ethtool_geeprom,
6682         .set_eeprom = s2io_ethtool_seeprom,
6683         .get_ringparam = s2io_ethtool_gringparam,
6684         .get_pauseparam = s2io_ethtool_getpause_data,
6685         .set_pauseparam = s2io_ethtool_setpause_data,
6686         .get_rx_csum = s2io_ethtool_get_rx_csum,
6687         .set_rx_csum = s2io_ethtool_set_rx_csum,
6688         .set_tx_csum = s2io_ethtool_op_set_tx_csum,
6689         .set_sg = ethtool_op_set_sg,
6690         .get_tso = s2io_ethtool_op_get_tso,
6691         .set_tso = s2io_ethtool_op_set_tso,
6692         .set_ufo = ethtool_op_set_ufo,
6693         .self_test = s2io_ethtool_test,
6694         .get_strings = s2io_ethtool_get_strings,
6695         .phys_id = s2io_ethtool_idnic,
6696         .get_ethtool_stats = s2io_get_ethtool_stats,
6697         .get_sset_count = s2io_get_sset_count,
6698 };
6699
6700 /**
6701  *  s2io_ioctl - Entry point for the Ioctl
6702  *  @dev :  Device pointer.
6703  *  @ifr :  An IOCTL specefic structure, that can contain a pointer to
6704  *  a proprietary structure used to pass information to the driver.
6705  *  @cmd :  This is used to distinguish between the different commands that
6706  *  can be passed to the IOCTL functions.
6707  *  Description:
6708  *  Currently there are no special functionality supported in IOCTL, hence
6709  *  function always return EOPNOTSUPPORTED
6710  */
6711
6712 static int s2io_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6713 {
6714         return -EOPNOTSUPP;
6715 }
6716
6717 /**
6718  *  s2io_change_mtu - entry point to change MTU size for the device.
6719  *   @dev : device pointer.
6720  *   @new_mtu : the new MTU size for the device.
6721  *   Description: A driver entry point to change MTU size for the device.
6722  *   Before changing the MTU the device must be stopped.
6723  *  Return value:
6724  *   0 on success and an appropriate (-)ve integer as defined in errno.h
6725  *   file on failure.
6726  */
6727
6728 static int s2io_change_mtu(struct net_device *dev, int new_mtu)
6729 {
6730         struct s2io_nic *sp = dev->priv;
6731         int ret = 0;
6732
6733         if ((new_mtu < MIN_MTU) || (new_mtu > S2IO_JUMBO_SIZE)) {
6734                 DBG_PRINT(ERR_DBG, "%s: MTU size is invalid.\n",
6735                           dev->name);
6736                 return -EPERM;
6737         }
6738
6739         dev->mtu = new_mtu;
6740         if (netif_running(dev)) {
6741                 s2io_stop_all_tx_queue(sp);
6742                 s2io_card_down(sp);
6743                 ret = s2io_card_up(sp);
6744                 if (ret) {
6745                         DBG_PRINT(ERR_DBG, "%s: Device bring up failed\n",
6746                                   __func__);
6747                         return ret;
6748                 }
6749                 s2io_wake_all_tx_queue(sp);
6750         } else { /* Device is down */
6751                 struct XENA_dev_config __iomem *bar0 = sp->bar0;
6752                 u64 val64 = new_mtu;
6753
6754                 writeq(vBIT(val64, 2, 14), &bar0->rmac_max_pyld_len);
6755         }
6756
6757         return ret;
6758 }
6759
6760 /**
6761  * s2io_set_link - Set the LInk status
6762  * @data: long pointer to device private structue
6763  * Description: Sets the link status for the adapter
6764  */
6765
6766 static void s2io_set_link(struct work_struct *work)
6767 {
6768         struct s2io_nic *nic = container_of(work, struct s2io_nic, set_link_task);
6769         struct net_device *dev = nic->dev;
6770         struct XENA_dev_config __iomem *bar0 = nic->bar0;
6771         register u64 val64;
6772         u16 subid;
6773
6774         rtnl_lock();
6775
6776         if (!netif_running(dev))
6777                 goto out_unlock;
6778
6779         if (test_and_set_bit(__S2IO_STATE_LINK_TASK, &(nic->state))) {
6780                 /* The card is being reset, no point doing anything */
6781                 goto out_unlock;
6782         }
6783
6784         subid = nic->pdev->subsystem_device;
6785         if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER) {
6786                 /*
6787                  * Allow a small delay for the NICs self initiated
6788                  * cleanup to complete.
6789                  */
6790                 msleep(100);
6791         }
6792
6793         val64 = readq(&bar0->adapter_status);
6794         if (LINK_IS_UP(val64)) {
6795                 if (!(readq(&bar0->adapter_control) & ADAPTER_CNTL_EN)) {
6796                         if (verify_xena_quiescence(nic)) {
6797                                 val64 = readq(&bar0->adapter_control);
6798                                 val64 |= ADAPTER_CNTL_EN;
6799                                 writeq(val64, &bar0->adapter_control);
6800                                 if (CARDS_WITH_FAULTY_LINK_INDICATORS(
6801                                         nic->device_type, subid)) {
6802                                         val64 = readq(&bar0->gpio_control);
6803                                         val64 |= GPIO_CTRL_GPIO_0;
6804                                         writeq(val64, &bar0->gpio_control);
6805                                         val64 = readq(&bar0->gpio_control);
6806                                 } else {
6807                                         val64 |= ADAPTER_LED_ON;
6808                                         writeq(val64, &bar0->adapter_control);
6809                                 }
6810                                 nic->device_enabled_once = TRUE;
6811                         } else {
6812                                 DBG_PRINT(ERR_DBG, "%s: Error: ", dev->name);
6813                                 DBG_PRINT(ERR_DBG, "device is not Quiescent\n");
6814                                 s2io_stop_all_tx_queue(nic);
6815                         }
6816                 }
6817                 val64 = readq(&bar0->adapter_control);
6818                 val64 |= ADAPTER_LED_ON;
6819                 writeq(val64, &bar0->adapter_control);
6820                 s2io_link(nic, LINK_UP);
6821         } else {
6822                 if (CARDS_WITH_FAULTY_LINK_INDICATORS(nic->device_type,
6823                                                       subid)) {
6824                         val64 = readq(&bar0->gpio_control);
6825                         val64 &= ~GPIO_CTRL_GPIO_0;
6826                         writeq(val64, &bar0->gpio_control);
6827                         val64 = readq(&bar0->gpio_control);
6828                 }
6829                 /* turn off LED */
6830                 val64 = readq(&bar0->adapter_control);
6831                 val64 = val64 &(~ADAPTER_LED_ON);
6832                 writeq(val64, &bar0->adapter_control);
6833                 s2io_link(nic, LINK_DOWN);
6834         }
6835         clear_bit(__S2IO_STATE_LINK_TASK, &(nic->state));
6836
6837 out_unlock:
6838         rtnl_unlock();
6839 }
6840
6841 static int set_rxd_buffer_pointer(struct s2io_nic *sp, struct RxD_t *rxdp,
6842                                 struct buffAdd *ba,
6843                                 struct sk_buff **skb, u64 *temp0, u64 *temp1,
6844                                 u64 *temp2, int size)
6845 {
6846         struct net_device *dev = sp->dev;
6847         struct swStat *stats = &sp->mac_control.stats_info->sw_stat;
6848
6849         if ((sp->rxd_mode == RXD_MODE_1) && (rxdp->Host_Control == 0)) {
6850                 struct RxD1 *rxdp1 = (struct RxD1 *)rxdp;
6851                 /* allocate skb */
6852                 if (*skb) {
6853                         DBG_PRINT(INFO_DBG, "SKB is not NULL\n");
6854                         /*
6855                          * As Rx frame are not going to be processed,
6856                          * using same mapped address for the Rxd
6857                          * buffer pointer
6858                          */
6859                         rxdp1->Buffer0_ptr = *temp0;
6860                 } else {
6861                         *skb = dev_alloc_skb(size);
6862                         if (!(*skb)) {
6863                                 DBG_PRINT(INFO_DBG, "%s: Out of ", dev->name);
6864                                 DBG_PRINT(INFO_DBG, "memory to allocate ");
6865                                 DBG_PRINT(INFO_DBG, "1 buf mode SKBs\n");
6866                                 sp->mac_control.stats_info->sw_stat. \
6867                                         mem_alloc_fail_cnt++;
6868                                 return -ENOMEM ;
6869                         }
6870                         sp->mac_control.stats_info->sw_stat.mem_allocated
6871                                 += (*skb)->truesize;
6872                         /* storing the mapped addr in a temp variable
6873                          * such it will be used for next rxd whose
6874                          * Host Control is NULL
6875                          */
6876                         rxdp1->Buffer0_ptr = *temp0 =
6877                                 pci_map_single( sp->pdev, (*skb)->data,
6878                                         size - NET_IP_ALIGN,
6879                                         PCI_DMA_FROMDEVICE);
6880                         if (pci_dma_mapping_error(sp->pdev, rxdp1->Buffer0_ptr))
6881                                 goto memalloc_failed;
6882                         rxdp->Host_Control = (unsigned long) (*skb);
6883                 }
6884         } else if ((sp->rxd_mode == RXD_MODE_3B) && (rxdp->Host_Control == 0)) {
6885                 struct RxD3 *rxdp3 = (struct RxD3 *)rxdp;
6886                 /* Two buffer Mode */
6887                 if (*skb) {
6888                         rxdp3->Buffer2_ptr = *temp2;
6889                         rxdp3->Buffer0_ptr = *temp0;
6890                         rxdp3->Buffer1_ptr = *temp1;
6891                 } else {
6892                         *skb = dev_alloc_skb(size);
6893                         if (!(*skb)) {
6894                                 DBG_PRINT(INFO_DBG, "%s: Out of ", dev->name);
6895                                 DBG_PRINT(INFO_DBG, "memory to allocate ");
6896                                 DBG_PRINT(INFO_DBG, "2 buf mode SKBs\n");
6897                                 sp->mac_control.stats_info->sw_stat. \
6898                                         mem_alloc_fail_cnt++;
6899                                 return -ENOMEM;
6900                         }
6901                         sp->mac_control.stats_info->sw_stat.mem_allocated
6902                                 += (*skb)->truesize;
6903                         rxdp3->Buffer2_ptr = *temp2 =
6904                                 pci_map_single(sp->pdev, (*skb)->data,
6905                                                dev->mtu + 4,
6906                                                PCI_DMA_FROMDEVICE);
6907                         if (pci_dma_mapping_error(sp->pdev, rxdp3->Buffer2_ptr))
6908                                 goto memalloc_failed;
6909                         rxdp3->Buffer0_ptr = *temp0 =
6910                                 pci_map_single( sp->pdev, ba->ba_0, BUF0_LEN,
6911                                                 PCI_DMA_FROMDEVICE);
6912                         if (pci_dma_mapping_error(sp->pdev,
6913                                                 rxdp3->Buffer0_ptr)) {
6914                                 pci_unmap_single (sp->pdev,
6915                                         (dma_addr_t)rxdp3->Buffer2_ptr,
6916                                         dev->mtu + 4, PCI_DMA_FROMDEVICE);
6917                                 goto memalloc_failed;
6918                         }
6919                         rxdp->Host_Control = (unsigned long) (*skb);
6920
6921                         /* Buffer-1 will be dummy buffer not used */
6922                         rxdp3->Buffer1_ptr = *temp1 =
6923                                 pci_map_single(sp->pdev, ba->ba_1, BUF1_LEN,
6924                                                 PCI_DMA_FROMDEVICE);
6925                         if (pci_dma_mapping_error(sp->pdev,
6926                                                 rxdp3->Buffer1_ptr)) {
6927                                 pci_unmap_single (sp->pdev,
6928                                         (dma_addr_t)rxdp3->Buffer0_ptr,
6929                                         BUF0_LEN, PCI_DMA_FROMDEVICE);
6930                                 pci_unmap_single (sp->pdev,
6931                                         (dma_addr_t)rxdp3->Buffer2_ptr,
6932                                         dev->mtu + 4, PCI_DMA_FROMDEVICE);
6933                                 goto memalloc_failed;
6934                         }
6935                 }
6936         }
6937         return 0;
6938         memalloc_failed:
6939                 stats->pci_map_fail_cnt++;
6940                 stats->mem_freed += (*skb)->truesize;
6941                 dev_kfree_skb(*skb);
6942                 return -ENOMEM;
6943 }
6944
6945 static void set_rxd_buffer_size(struct s2io_nic *sp, struct RxD_t *rxdp,
6946                                 int size)
6947 {
6948         struct net_device *dev = sp->dev;
6949         if (sp->rxd_mode == RXD_MODE_1) {
6950                 rxdp->Control_2 = SET_BUFFER0_SIZE_1( size - NET_IP_ALIGN);
6951         } else if (sp->rxd_mode == RXD_MODE_3B) {
6952                 rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN);
6953                 rxdp->Control_2 |= SET_BUFFER1_SIZE_3(1);
6954                 rxdp->Control_2 |= SET_BUFFER2_SIZE_3( dev->mtu + 4);
6955         }
6956 }
6957
6958 static  int rxd_owner_bit_reset(struct s2io_nic *sp)
6959 {
6960         int i, j, k, blk_cnt = 0, size;
6961         struct mac_info * mac_control = &sp->mac_control;
6962         struct config_param *config = &sp->config;
6963         struct net_device *dev = sp->dev;
6964         struct RxD_t *rxdp = NULL;
6965         struct sk_buff *skb = NULL;
6966         struct buffAdd *ba = NULL;
6967         u64 temp0_64 = 0, temp1_64 = 0, temp2_64 = 0;
6968
6969         /* Calculate the size based on ring mode */
6970         size = dev->mtu + HEADER_ETHERNET_II_802_3_SIZE +
6971                 HEADER_802_2_SIZE + HEADER_SNAP_SIZE;
6972         if (sp->rxd_mode == RXD_MODE_1)
6973                 size += NET_IP_ALIGN;
6974         else if (sp->rxd_mode == RXD_MODE_3B)
6975                 size = dev->mtu + ALIGN_SIZE + BUF0_LEN + 4;
6976
6977         for (i = 0; i < config->rx_ring_num; i++) {
6978                 blk_cnt = config->rx_cfg[i].num_rxd /
6979                         (rxd_count[sp->rxd_mode] +1);
6980
6981                 for (j = 0; j < blk_cnt; j++) {
6982                         for (k = 0; k < rxd_count[sp->rxd_mode]; k++) {
6983                                 rxdp = mac_control->rings[i].
6984                                         rx_blocks[j].rxds[k].virt_addr;
6985                                 if(sp->rxd_mode == RXD_MODE_3B)
6986                                         ba = &mac_control->rings[i].ba[j][k];
6987                                 if (set_rxd_buffer_pointer(sp, rxdp, ba,
6988                                                        &skb,(u64 *)&temp0_64,
6989                                                        (u64 *)&temp1_64,
6990                                                        (u64 *)&temp2_64,
6991                                                         size) == -ENOMEM) {
6992                                         return 0;
6993                                 }
6994
6995                                 set_rxd_buffer_size(sp, rxdp, size);
6996                                 wmb();
6997                                 /* flip the Ownership bit to Hardware */
6998                                 rxdp->Control_1 |= RXD_OWN_XENA;
6999                         }
7000                 }
7001         }
7002         return 0;
7003
7004 }
7005
7006 static int s2io_add_isr(struct s2io_nic * sp)
7007 {
7008         int ret = 0;
7009         struct net_device *dev = sp->dev;
7010         int err = 0;
7011
7012         if (sp->config.intr_type == MSI_X)
7013                 ret = s2io_enable_msi_x(sp);
7014         if (ret) {
7015                 DBG_PRINT(ERR_DBG, "%s: Defaulting to INTA\n", dev->name);
7016                 sp->config.intr_type = INTA;
7017         }
7018
7019         /* Store the values of the MSIX table in the struct s2io_nic structure */
7020         store_xmsi_data(sp);
7021
7022         /* After proper initialization of H/W, register ISR */
7023         if (sp->config.intr_type == MSI_X) {
7024                 int i, msix_rx_cnt = 0;
7025
7026                 for (i = 0; i < sp->num_entries; i++) {
7027                         if (sp->s2io_entries[i].in_use == MSIX_FLG) {
7028                                 if (sp->s2io_entries[i].type ==
7029                                         MSIX_RING_TYPE) {
7030                                         sprintf(sp->desc[i], "%s:MSI-X-%d-RX",
7031                                                 dev->name, i);
7032                                         err = request_irq(sp->entries[i].vector,
7033                                                 s2io_msix_ring_handle, 0,
7034                                                 sp->desc[i],
7035                                                 sp->s2io_entries[i].arg);
7036                                 } else if (sp->s2io_entries[i].type ==
7037                                         MSIX_ALARM_TYPE) {
7038                                         sprintf(sp->desc[i], "%s:MSI-X-%d-TX",
7039                                         dev->name, i);
7040                                         err = request_irq(sp->entries[i].vector,
7041                                                 s2io_msix_fifo_handle, 0,
7042                                                 sp->desc[i],
7043                                                 sp->s2io_entries[i].arg);
7044
7045                                 }
7046                                 /* if either data or addr is zero print it. */
7047                                 if (!(sp->msix_info[i].addr &&
7048                                         sp->msix_info[i].data)) {
7049                                         DBG_PRINT(ERR_DBG,
7050                                                 "%s @Addr:0x%llx Data:0x%llx\n",
7051                                                 sp->desc[i],
7052                                                 (unsigned long long)
7053                                                 sp->msix_info[i].addr,
7054                                                 (unsigned long long)
7055                                                 ntohl(sp->msix_info[i].data));
7056                                 } else
7057                                         msix_rx_cnt++;
7058                                 if (err) {
7059                                         remove_msix_isr(sp);
7060
7061                                         DBG_PRINT(ERR_DBG,
7062                                                 "%s:MSI-X-%d registration "
7063                                                 "failed\n", dev->name, i);
7064
7065                                         DBG_PRINT(ERR_DBG,
7066                                                 "%s: Defaulting to INTA\n",
7067                                                 dev->name);
7068                                         sp->config.intr_type = INTA;
7069                                         break;
7070                                 }
7071                                 sp->s2io_entries[i].in_use =
7072                                         MSIX_REGISTERED_SUCCESS;
7073                         }
7074                 }
7075                 if (!err) {
7076                         printk(KERN_INFO "MSI-X-RX %d entries enabled\n",
7077                                 --msix_rx_cnt);
7078                         DBG_PRINT(INFO_DBG, "MSI-X-TX entries enabled"
7079                                                 " through alarm vector\n");
7080                 }
7081         }
7082         if (sp->config.intr_type == INTA) {
7083                 err = request_irq((int) sp->pdev->irq, s2io_isr, IRQF_SHARED,
7084                                 sp->name, dev);
7085                 if (err) {
7086                         DBG_PRINT(ERR_DBG, "%s: ISR registration failed\n",
7087                                   dev->name);
7088                         return -1;
7089                 }
7090         }
7091         return 0;
7092 }
7093 static void s2io_rem_isr(struct s2io_nic * sp)
7094 {
7095         if (sp->config.intr_type == MSI_X)
7096                 remove_msix_isr(sp);
7097         else
7098                 remove_inta_isr(sp);
7099 }
7100
7101 static void do_s2io_card_down(struct s2io_nic * sp, int do_io)
7102 {
7103         int cnt = 0;
7104         struct XENA_dev_config __iomem *bar0 = sp->bar0;
7105         register u64 val64 = 0;
7106         struct config_param *config;
7107         config = &sp->config;
7108
7109         if (!is_s2io_card_up(sp))
7110                 return;
7111
7112         del_timer_sync(&sp->alarm_timer);
7113         /* If s2io_set_link task is executing, wait till it completes. */
7114         while (test_and_set_bit(__S2IO_STATE_LINK_TASK, &(sp->state))) {
7115                 msleep(50);
7116         }
7117         clear_bit(__S2IO_STATE_CARD_UP, &sp->state);
7118
7119         /* Disable napi */
7120         if (sp->config.napi) {
7121                 int off = 0;
7122                 if (config->intr_type ==  MSI_X) {
7123                         for (; off < sp->config.rx_ring_num; off++)
7124                                 napi_disable(&sp->mac_control.rings[off].napi);
7125                         }
7126                 else
7127                         napi_disable(&sp->napi);
7128         }
7129
7130         /* disable Tx and Rx traffic on the NIC */
7131         if (do_io)
7132                 stop_nic(sp);
7133
7134         s2io_rem_isr(sp);
7135
7136         /* stop the tx queue, indicate link down */
7137         s2io_link(sp, LINK_DOWN);
7138
7139         /* Check if the device is Quiescent and then Reset the NIC */
7140         while(do_io) {
7141                 /* As per the HW requirement we need to replenish the
7142                  * receive buffer to avoid the ring bump. Since there is
7143                  * no intention of processing the Rx frame at this pointwe are
7144                  * just settting the ownership bit of rxd in Each Rx
7145                  * ring to HW and set the appropriate buffer size
7146                  * based on the ring mode
7147                  */
7148                 rxd_owner_bit_reset(sp);
7149
7150                 val64 = readq(&bar0->adapter_status);
7151                 if (verify_xena_quiescence(sp)) {
7152                         if(verify_pcc_quiescent(sp, sp->device_enabled_once))
7153                         break;
7154                 }
7155
7156                 msleep(50);
7157                 cnt++;
7158                 if (cnt == 10) {
7159                         DBG_PRINT(ERR_DBG,
7160                                   "s2io_close:Device not Quiescent ");
7161                         DBG_PRINT(ERR_DBG, "adaper status reads 0x%llx\n",
7162                                   (unsigned long long) val64);
7163                         break;
7164                 }
7165         }
7166         if (do_io)
7167                 s2io_reset(sp);
7168
7169         /* Free all Tx buffers */
7170         free_tx_buffers(sp);
7171
7172         /* Free all Rx buffers */
7173         free_rx_buffers(sp);
7174
7175         clear_bit(__S2IO_STATE_LINK_TASK, &(sp->state));
7176 }
7177
7178 static void s2io_card_down(struct s2io_nic * sp)
7179 {
7180         do_s2io_card_down(sp, 1);
7181 }
7182
7183 static int s2io_card_up(struct s2io_nic * sp)
7184 {
7185         int i, ret = 0;
7186         struct mac_info *mac_control;
7187         struct config_param *config;
7188         struct net_device *dev = (struct net_device *) sp->dev;
7189         u16 interruptible;
7190
7191         /* Initialize the H/W I/O registers */
7192         ret = init_nic(sp);
7193         if (ret != 0) {
7194                 DBG_PRINT(ERR_DBG, "%s: H/W initialization failed\n",
7195                           dev->name);
7196                 if (ret != -EIO)
7197                         s2io_reset(sp);
7198                 return ret;
7199         }
7200
7201         /*
7202          * Initializing the Rx buffers. For now we are considering only 1
7203          * Rx ring and initializing buffers into 30 Rx blocks
7204          */
7205         mac_control = &sp->mac_control;
7206         config = &sp->config;
7207
7208         for (i = 0; i < config->rx_ring_num; i++) {
7209                 mac_control->rings[i].mtu = dev->mtu;
7210                 ret = fill_rx_buffers(sp, &mac_control->rings[i], 1);
7211                 if (ret) {
7212                         DBG_PRINT(ERR_DBG, "%s: Out of memory in Open\n",
7213                                   dev->name);
7214                         s2io_reset(sp);
7215                         free_rx_buffers(sp);
7216                         return -ENOMEM;
7217                 }
7218                 DBG_PRINT(INFO_DBG, "Buf in ring:%d is %d:\n", i,
7219                           mac_control->rings[i].rx_bufs_left);
7220         }
7221
7222         /* Initialise napi */
7223         if (config->napi) {
7224                 int i;
7225                 if (config->intr_type ==  MSI_X) {
7226                         for (i = 0; i < sp->config.rx_ring_num; i++)
7227                                 napi_enable(&sp->mac_control.rings[i].napi);
7228                 } else {
7229                         napi_enable(&sp->napi);
7230                 }
7231         }
7232
7233         /* Maintain the state prior to the open */
7234         if (sp->promisc_flg)
7235                 sp->promisc_flg = 0;
7236         if (sp->m_cast_flg) {
7237                 sp->m_cast_flg = 0;
7238                 sp->all_multi_pos= 0;
7239         }
7240
7241         /* Setting its receive mode */
7242         s2io_set_multicast(dev);
7243
7244         if (sp->lro) {
7245                 /* Initialize max aggregatable pkts per session based on MTU */
7246                 sp->lro_max_aggr_per_sess = ((1<<16) - 1) / dev->mtu;
7247                 /* Check if we can use(if specified) user provided value */
7248                 if (lro_max_pkts < sp->lro_max_aggr_per_sess)
7249                         sp->lro_max_aggr_per_sess = lro_max_pkts;
7250         }
7251
7252         /* Enable Rx Traffic and interrupts on the NIC */
7253         if (start_nic(sp)) {
7254                 DBG_PRINT(ERR_DBG, "%s: Starting NIC failed\n", dev->name);
7255                 s2io_reset(sp);
7256                 free_rx_buffers(sp);
7257                 return -ENODEV;
7258         }
7259
7260         /* Add interrupt service routine */
7261         if (s2io_add_isr(sp) != 0) {
7262                 if (sp->config.intr_type == MSI_X)
7263                         s2io_rem_isr(sp);
7264                 s2io_reset(sp);
7265                 free_rx_buffers(sp);
7266                 return -ENODEV;
7267         }
7268
7269         S2IO_TIMER_CONF(sp->alarm_timer, s2io_alarm_handle, sp, (HZ/2));
7270
7271         set_bit(__S2IO_STATE_CARD_UP, &sp->state);
7272
7273         /*  Enable select interrupts */
7274         en_dis_err_alarms(sp, ENA_ALL_INTRS, ENABLE_INTRS);
7275         if (sp->config.intr_type != INTA) {
7276                 interruptible = TX_TRAFFIC_INTR | TX_PIC_INTR;
7277                 en_dis_able_nic_intrs(sp, interruptible, ENABLE_INTRS);
7278         } else {
7279                 interruptible = TX_TRAFFIC_INTR | RX_TRAFFIC_INTR;
7280                 interruptible |= TX_PIC_INTR;
7281                 en_dis_able_nic_intrs(sp, interruptible, ENABLE_INTRS);
7282         }
7283
7284         return 0;
7285 }
7286
7287 /**
7288  * s2io_restart_nic - Resets the NIC.
7289  * @data : long pointer to the device private structure
7290  * Description:
7291  * This function is scheduled to be run by the s2io_tx_watchdog
7292  * function after 0.5 secs to reset the NIC. The idea is to reduce
7293  * the run time of the watch dog routine which is run holding a
7294  * spin lock.
7295  */
7296
7297 static void s2io_restart_nic(struct work_struct *work)
7298 {
7299         struct s2io_nic *sp = container_of(work, struct s2io_nic, rst_timer_task);
7300         struct net_device *dev = sp->dev;
7301
7302         rtnl_lock();
7303
7304         if (!netif_running(dev))
7305                 goto out_unlock;
7306
7307         s2io_card_down(sp);
7308         if (s2io_card_up(sp)) {
7309                 DBG_PRINT(ERR_DBG, "%s: Device bring up failed\n",
7310                           dev->name);
7311         }
7312         s2io_wake_all_tx_queue(sp);
7313         DBG_PRINT(ERR_DBG, "%s: was reset by Tx watchdog timer\n",
7314                   dev->name);
7315 out_unlock:
7316         rtnl_unlock();
7317 }
7318
7319 /**
7320  *  s2io_tx_watchdog - Watchdog for transmit side.
7321  *  @dev : Pointer to net device structure
7322  *  Description:
7323  *  This function is triggered if the Tx Queue is stopped
7324  *  for a pre-defined amount of time when the Interface is still up.
7325  *  If the Interface is jammed in such a situation, the hardware is
7326  *  reset (by s2io_close) and restarted again (by s2io_open) to
7327  *  overcome any problem that might have been caused in the hardware.
7328  *  Return value:
7329  *  void
7330  */
7331
7332 static void s2io_tx_watchdog(struct net_device *dev)
7333 {
7334         struct s2io_nic *sp = dev->priv;
7335
7336         if (netif_carrier_ok(dev)) {
7337                 sp->mac_control.stats_info->sw_stat.watchdog_timer_cnt++;
7338                 schedule_work(&sp->rst_timer_task);
7339                 sp->mac_control.stats_info->sw_stat.soft_reset_cnt++;
7340         }
7341 }
7342
7343 /**
7344  *   rx_osm_handler - To perform some OS related operations on SKB.
7345  *   @sp: private member of the device structure,pointer to s2io_nic structure.
7346  *   @skb : the socket buffer pointer.
7347  *   @len : length of the packet
7348  *   @cksum : FCS checksum of the frame.
7349  *   @ring_no : the ring from which this RxD was extracted.
7350  *   Description:
7351  *   This function is called by the Rx interrupt serivce routine to perform
7352  *   some OS related operations on the SKB before passing it to the upper
7353  *   layers. It mainly checks if the checksum is OK, if so adds it to the
7354  *   SKBs cksum variable, increments the Rx packet count and passes the SKB
7355  *   to the upper layer. If the checksum is wrong, it increments the Rx
7356  *   packet error count, frees the SKB and returns error.
7357  *   Return value:
7358  *   SUCCESS on success and -1 on failure.
7359  */
7360 static int rx_osm_handler(struct ring_info *ring_data, struct RxD_t * rxdp)
7361 {
7362         struct s2io_nic *sp = ring_data->nic;
7363         struct net_device *dev = (struct net_device *) ring_data->dev;
7364         struct sk_buff *skb = (struct sk_buff *)
7365                 ((unsigned long) rxdp->Host_Control);
7366         int ring_no = ring_data->ring_no;
7367         u16 l3_csum, l4_csum;
7368         unsigned long long err = rxdp->Control_1 & RXD_T_CODE;
7369         struct lro *lro;
7370         u8 err_mask;
7371
7372         skb->dev = dev;
7373
7374         if (err) {
7375                 /* Check for parity error */
7376                 if (err & 0x1) {
7377                         sp->mac_control.stats_info->sw_stat.parity_err_cnt++;
7378                 }
7379                 err_mask = err >> 48;
7380                 switch(err_mask) {
7381                         case 1:
7382                                 sp->mac_control.stats_info->sw_stat.
7383                                 rx_parity_err_cnt++;
7384                         break;
7385
7386                         case 2:
7387                                 sp->mac_control.stats_info->sw_stat.
7388                                 rx_abort_cnt++;
7389                         break;
7390
7391                         case 3:
7392                                 sp->mac_control.stats_info->sw_stat.
7393                                 rx_parity_abort_cnt++;
7394                         break;
7395
7396                         case 4:
7397                                 sp->mac_control.stats_info->sw_stat.
7398                                 rx_rda_fail_cnt++;
7399                         break;
7400
7401                         case 5:
7402                                 sp->mac_control.stats_info->sw_stat.
7403                                 rx_unkn_prot_cnt++;
7404                         break;
7405
7406                         case 6:
7407                                 sp->mac_control.stats_info->sw_stat.
7408                                 rx_fcs_err_cnt++;
7409                         break;
7410
7411                         case 7:
7412                                 sp->mac_control.stats_info->sw_stat.
7413                                 rx_buf_size_err_cnt++;
7414                         break;
7415
7416                         case 8:
7417                                 sp->mac_control.stats_info->sw_stat.
7418                                 rx_rxd_corrupt_cnt++;
7419                         break;
7420
7421                         case 15:
7422                                 sp->mac_control.stats_info->sw_stat.
7423                                 rx_unkn_err_cnt++;
7424                         break;
7425                 }
7426                 /*
7427                 * Drop the packet if bad transfer code. Exception being
7428                 * 0x5, which could be due to unsupported IPv6 extension header.
7429                 * In this case, we let stack handle the packet.
7430                 * Note that in this case, since checksum will be incorrect,
7431                 * stack will validate the same.
7432                 */
7433                 if (err_mask != 0x5) {
7434                         DBG_PRINT(ERR_DBG, "%s: Rx error Value: 0x%x\n",
7435                                 dev->name, err_mask);
7436                         dev->stats.rx_crc_errors++;
7437                         sp->mac_control.stats_info->sw_stat.mem_freed
7438                                 += skb->truesize;
7439                         dev_kfree_skb(skb);
7440                         ring_data->rx_bufs_left -= 1;
7441                         rxdp->Host_Control = 0;
7442                         return 0;
7443                 }
7444         }
7445
7446         /* Updating statistics */
7447         ring_data->rx_packets++;
7448         rxdp->Host_Control = 0;
7449         if (sp->rxd_mode == RXD_MODE_1) {
7450                 int len = RXD_GET_BUFFER0_SIZE_1(rxdp->Control_2);
7451
7452                 ring_data->rx_bytes += len;
7453                 skb_put(skb, len);
7454
7455         } else if (sp->rxd_mode == RXD_MODE_3B) {
7456                 int get_block = ring_data->rx_curr_get_info.block_index;
7457                 int get_off = ring_data->rx_curr_get_info.offset;
7458                 int buf0_len = RXD_GET_BUFFER0_SIZE_3(rxdp->Control_2);
7459                 int buf2_len = RXD_GET_BUFFER2_SIZE_3(rxdp->Control_2);
7460                 unsigned char *buff = skb_push(skb, buf0_len);
7461
7462                 struct buffAdd *ba = &ring_data->ba[get_block][get_off];
7463                 ring_data->rx_bytes += buf0_len + buf2_len;
7464                 memcpy(buff, ba->ba_0, buf0_len);
7465                 skb_put(skb, buf2_len);
7466         }
7467
7468         if ((rxdp->Control_1 & TCP_OR_UDP_FRAME) && ((!ring_data->lro) ||
7469             (ring_data->lro && (!(rxdp->Control_1 & RXD_FRAME_IP_FRAG)))) &&
7470             (sp->rx_csum)) {
7471                 l3_csum = RXD_GET_L3_CKSUM(rxdp->Control_1);
7472                 l4_csum = RXD_GET_L4_CKSUM(rxdp->Control_1);
7473                 if ((l3_csum == L3_CKSUM_OK) && (l4_csum == L4_CKSUM_OK)) {
7474                         /*
7475                          * NIC verifies if the Checksum of the received
7476                          * frame is Ok or not and accordingly returns
7477                          * a flag in the RxD.
7478                          */
7479                         skb->ip_summed = CHECKSUM_UNNECESSARY;
7480                         if (ring_data->lro) {
7481                                 u32 tcp_len;
7482                                 u8 *tcp;
7483                                 int ret = 0;
7484
7485                                 ret = s2io_club_tcp_session(ring_data,
7486                                         skb->data, &tcp, &tcp_len, &lro,
7487                                         rxdp, sp);
7488                                 switch (ret) {
7489                                         case 3: /* Begin anew */
7490                                                 lro->parent = skb;
7491                                                 goto aggregate;
7492                                         case 1: /* Aggregate */
7493                                         {
7494                                                 lro_append_pkt(sp, lro,
7495                                                         skb, tcp_len);
7496                                                 goto aggregate;
7497                                         }
7498                                         case 4: /* Flush session */
7499                                         {
7500                                                 lro_append_pkt(sp, lro,
7501                                                         skb, tcp_len);
7502                                                 queue_rx_frame(lro->parent,
7503                                                         lro->vlan_tag);
7504                                                 clear_lro_session(lro);
7505                                                 sp->mac_control.stats_info->
7506                                                     sw_stat.flush_max_pkts++;
7507                                                 goto aggregate;
7508                                         }
7509                                         case 2: /* Flush both */
7510                                                 lro->parent->data_len =
7511                                                         lro->frags_len;
7512                                                 sp->mac_control.stats_info->
7513                                                      sw_stat.sending_both++;
7514                                                 queue_rx_frame(lro->parent,
7515                                                         lro->vlan_tag);
7516                                                 clear_lro_session(lro);
7517                                                 goto send_up;
7518                                         case 0: /* sessions exceeded */
7519                                         case -1: /* non-TCP or not
7520                                                   * L2 aggregatable
7521                                                   */
7522                                         case 5: /*
7523                                                  * First pkt in session not
7524                                                  * L3/L4 aggregatable
7525                                                  */
7526                                                 break;
7527                                         default:
7528                                                 DBG_PRINT(ERR_DBG,
7529                                                         "%s: Samadhana!!\n",
7530                                                          __func__);
7531                                                 BUG();
7532                                 }
7533                         }
7534                 } else {
7535                         /*
7536                          * Packet with erroneous checksum, let the
7537                          * upper layers deal with it.
7538                          */
7539                         skb->ip_summed = CHECKSUM_NONE;
7540                 }
7541         } else
7542                 skb->ip_summed = CHECKSUM_NONE;
7543
7544         sp->mac_control.stats_info->sw_stat.mem_freed += skb->truesize;
7545 send_up:
7546         queue_rx_frame(skb, RXD_GET_VLAN_TAG(rxdp->Control_2));
7547         dev->last_rx = jiffies;
7548 aggregate:
7549         sp->mac_control.rings[ring_no].rx_bufs_left -= 1;
7550         return SUCCESS;
7551 }
7552
7553 /**
7554  *  s2io_link - stops/starts the Tx queue.
7555  *  @sp : private member of the device structure, which is a pointer to the
7556  *  s2io_nic structure.
7557  *  @link : inidicates whether link is UP/DOWN.
7558  *  Description:
7559  *  This function stops/starts the Tx queue depending on whether the link
7560  *  status of the NIC is is down or up. This is called by the Alarm
7561  *  interrupt handler whenever a link change interrupt comes up.
7562  *  Return value:
7563  *  void.
7564  */
7565
7566 static void s2io_link(struct s2io_nic * sp, int link)
7567 {
7568         struct net_device *dev = (struct net_device *) sp->dev;
7569
7570         if (link != sp->last_link_state) {
7571                 init_tti(sp, link);
7572                 if (link == LINK_DOWN) {
7573                         DBG_PRINT(ERR_DBG, "%s: Link down\n", dev->name);
7574                         s2io_stop_all_tx_queue(sp);
7575                         netif_carrier_off(dev);
7576                         if(sp->mac_control.stats_info->sw_stat.link_up_cnt)
7577                         sp->mac_control.stats_info->sw_stat.link_up_time =
7578                                 jiffies - sp->start_time;
7579                         sp->mac_control.stats_info->sw_stat.link_down_cnt++;
7580                 } else {
7581                         DBG_PRINT(ERR_DBG, "%s: Link Up\n", dev->name);
7582                         if (sp->mac_control.stats_info->sw_stat.link_down_cnt)
7583                         sp->mac_control.stats_info->sw_stat.link_down_time =
7584                                 jiffies - sp->start_time;
7585                         sp->mac_control.stats_info->sw_stat.link_up_cnt++;
7586                         netif_carrier_on(dev);
7587                         s2io_wake_all_tx_queue(sp);
7588                 }
7589         }
7590         sp->last_link_state = link;
7591         sp->start_time = jiffies;
7592 }
7593
7594 /**
7595  *  s2io_init_pci -Initialization of PCI and PCI-X configuration registers .
7596  *  @sp : private member of the device structure, which is a pointer to the
7597  *  s2io_nic structure.
7598  *  Description:
7599  *  This function initializes a few of the PCI and PCI-X configuration registers
7600  *  with recommended values.
7601  *  Return value:
7602  *  void
7603  */
7604
7605 static void s2io_init_pci(struct s2io_nic * sp)
7606 {
7607         u16 pci_cmd = 0, pcix_cmd = 0;
7608
7609         /* Enable Data Parity Error Recovery in PCI-X command register. */
7610         pci_read_config_word(sp->pdev, PCIX_COMMAND_REGISTER,
7611                              &(pcix_cmd));
7612         pci_write_config_word(sp->pdev, PCIX_COMMAND_REGISTER,
7613                               (pcix_cmd | 1));
7614         pci_read_config_word(sp->pdev, PCIX_COMMAND_REGISTER,
7615                              &(pcix_cmd));
7616
7617         /* Set the PErr Response bit in PCI command register. */
7618         pci_read_config_word(sp->pdev, PCI_COMMAND, &pci_cmd);
7619         pci_write_config_word(sp->pdev, PCI_COMMAND,
7620                               (pci_cmd | PCI_COMMAND_PARITY));
7621         pci_read_config_word(sp->pdev, PCI_COMMAND, &pci_cmd);
7622 }
7623
7624 static int s2io_verify_parm(struct pci_dev *pdev, u8 *dev_intr_type,
7625         u8 *dev_multiq)
7626 {
7627         if ((tx_fifo_num > MAX_TX_FIFOS) ||
7628                 (tx_fifo_num < 1)) {
7629                 DBG_PRINT(ERR_DBG, "s2io: Requested number of tx fifos "
7630                         "(%d) not supported\n", tx_fifo_num);
7631
7632                 if (tx_fifo_num < 1)
7633                         tx_fifo_num = 1;
7634                 else
7635                         tx_fifo_num = MAX_TX_FIFOS;
7636
7637                 DBG_PRINT(ERR_DBG, "s2io: Default to %d ", tx_fifo_num);
7638                 DBG_PRINT(ERR_DBG, "tx fifos\n");
7639         }
7640
7641         if (multiq)
7642                 *dev_multiq = multiq;
7643
7644         if (tx_steering_type && (1 == tx_fifo_num)) {
7645                 if (tx_steering_type != TX_DEFAULT_STEERING)
7646                         DBG_PRINT(ERR_DBG,
7647                                 "s2io: Tx steering is not supported with "
7648                                 "one fifo. Disabling Tx steering.\n");
7649                 tx_steering_type = NO_STEERING;
7650         }
7651
7652         if ((tx_steering_type < NO_STEERING) ||
7653                 (tx_steering_type > TX_DEFAULT_STEERING)) {
7654                 DBG_PRINT(ERR_DBG, "s2io: Requested transmit steering not "
7655                          "supported\n");
7656                 DBG_PRINT(ERR_DBG, "s2io: Disabling transmit steering\n");
7657                 tx_steering_type = NO_STEERING;
7658         }
7659
7660         if (rx_ring_num > MAX_RX_RINGS) {
7661                 DBG_PRINT(ERR_DBG, "s2io: Requested number of rx rings not "
7662                          "supported\n");
7663                 DBG_PRINT(ERR_DBG, "s2io: Default to %d rx rings\n",
7664                         MAX_RX_RINGS);
7665                 rx_ring_num = MAX_RX_RINGS;
7666         }
7667
7668         if ((*dev_intr_type != INTA) && (*dev_intr_type != MSI_X)) {
7669                 DBG_PRINT(ERR_DBG, "s2io: Wrong intr_type requested. "
7670                           "Defaulting to INTA\n");
7671                 *dev_intr_type = INTA;
7672         }
7673
7674         if ((*dev_intr_type == MSI_X) &&
7675                         ((pdev->device != PCI_DEVICE_ID_HERC_WIN) &&
7676                         (pdev->device != PCI_DEVICE_ID_HERC_UNI))) {
7677                 DBG_PRINT(ERR_DBG, "s2io: Xframe I does not support MSI_X. "
7678                                         "Defaulting to INTA\n");
7679                 *dev_intr_type = INTA;
7680         }
7681
7682         if ((rx_ring_mode != 1) && (rx_ring_mode != 2)) {
7683                 DBG_PRINT(ERR_DBG, "s2io: Requested ring mode not supported\n");
7684                 DBG_PRINT(ERR_DBG, "s2io: Defaulting to 1-buffer mode\n");
7685                 rx_ring_mode = 1;
7686         }
7687         return SUCCESS;
7688 }
7689
7690 /**
7691  * rts_ds_steer - Receive traffic steering based on IPv4 or IPv6 TOS
7692  * or Traffic class respectively.
7693  * @nic: device private variable
7694  * Description: The function configures the receive steering to
7695  * desired receive ring.
7696  * Return Value:  SUCCESS on success and
7697  * '-1' on failure (endian settings incorrect).
7698  */
7699 static int rts_ds_steer(struct s2io_nic *nic, u8 ds_codepoint, u8 ring)
7700 {
7701         struct XENA_dev_config __iomem *bar0 = nic->bar0;
7702         register u64 val64 = 0;
7703
7704         if (ds_codepoint > 63)
7705                 return FAILURE;
7706
7707         val64 = RTS_DS_MEM_DATA(ring);
7708         writeq(val64, &bar0->rts_ds_mem_data);
7709
7710         val64 = RTS_DS_MEM_CTRL_WE |
7711                 RTS_DS_MEM_CTRL_STROBE_NEW_CMD |
7712                 RTS_DS_MEM_CTRL_OFFSET(ds_codepoint);
7713
7714         writeq(val64, &bar0->rts_ds_mem_ctrl);
7715
7716         return wait_for_cmd_complete(&bar0->rts_ds_mem_ctrl,
7717                                 RTS_DS_MEM_CTRL_STROBE_CMD_BEING_EXECUTED,
7718                                 S2IO_BIT_RESET);
7719 }
7720
7721 /**
7722  *  s2io_init_nic - Initialization of the adapter .
7723  *  @pdev : structure containing the PCI related information of the device.
7724  *  @pre: List of PCI devices supported by the driver listed in s2io_tbl.
7725  *  Description:
7726  *  The function initializes an adapter identified by the pci_dec structure.
7727  *  All OS related initialization including memory and device structure and
7728  *  initlaization of the device private variable is done. Also the swapper
7729  *  control register is initialized to enable read and write into the I/O
7730  *  registers of the device.
7731  *  Return value:
7732  *  returns 0 on success and negative on failure.
7733  */
7734
7735 static int __devinit
7736 s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
7737 {
7738         struct s2io_nic *sp;
7739         struct net_device *dev;
7740         int i, j, ret;
7741         int dma_flag = FALSE;
7742         u32 mac_up, mac_down;
7743         u64 val64 = 0, tmp64 = 0;
7744         struct XENA_dev_config __iomem *bar0 = NULL;
7745         u16 subid;
7746         struct mac_info *mac_control;
7747         struct config_param *config;
7748         int mode;
7749         u8 dev_intr_type = intr_type;
7750         u8 dev_multiq = 0;
7751         DECLARE_MAC_BUF(mac);
7752
7753         ret = s2io_verify_parm(pdev, &dev_intr_type, &dev_multiq);
7754         if (ret)
7755                 return ret;
7756
7757         if ((ret = pci_enable_device(pdev))) {
7758                 DBG_PRINT(ERR_DBG,
7759                           "s2io_init_nic: pci_enable_device failed\n");
7760                 return ret;
7761         }
7762
7763         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
7764                 DBG_PRINT(INIT_DBG, "s2io_init_nic: Using 64bit DMA\n");
7765                 dma_flag = TRUE;
7766                 if (pci_set_consistent_dma_mask
7767                     (pdev, DMA_64BIT_MASK)) {
7768                         DBG_PRINT(ERR_DBG,
7769                                   "Unable to obtain 64bit DMA for \
7770                                         consistent allocations\n");
7771                         pci_disable_device(pdev);
7772                         return -ENOMEM;
7773                 }
7774         } else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
7775                 DBG_PRINT(INIT_DBG, "s2io_init_nic: Using 32bit DMA\n");
7776         } else {
7777                 pci_disable_device(pdev);
7778                 return -ENOMEM;
7779         }
7780         if ((ret = pci_request_regions(pdev, s2io_driver_name))) {
7781                 DBG_PRINT(ERR_DBG, "%s: Request Regions failed - %x \n", __func__, ret);
7782                 pci_disable_device(pdev);
7783                 return -ENODEV;
7784         }
7785         if (dev_multiq)
7786                 dev = alloc_etherdev_mq(sizeof(struct s2io_nic), tx_fifo_num);
7787         else
7788                 dev = alloc_etherdev(sizeof(struct s2io_nic));
7789         if (dev == NULL) {
7790                 DBG_PRINT(ERR_DBG, "Device allocation failed\n");
7791                 pci_disable_device(pdev);
7792                 pci_release_regions(pdev);
7793                 return -ENODEV;
7794         }
7795
7796         pci_set_master(pdev);
7797         pci_set_drvdata(pdev, dev);
7798         SET_NETDEV_DEV(dev, &pdev->dev);
7799
7800         /*  Private member variable initialized to s2io NIC structure */
7801         sp = dev->priv;
7802         memset(sp, 0, sizeof(struct s2io_nic));
7803         sp->dev = dev;
7804         sp->pdev = pdev;
7805         sp->high_dma_flag = dma_flag;
7806         sp->device_enabled_once = FALSE;
7807         if (rx_ring_mode == 1)
7808                 sp->rxd_mode = RXD_MODE_1;
7809         if (rx_ring_mode == 2)
7810                 sp->rxd_mode = RXD_MODE_3B;
7811
7812         sp->config.intr_type = dev_intr_type;
7813
7814         if ((pdev->device == PCI_DEVICE_ID_HERC_WIN) ||
7815                 (pdev->device == PCI_DEVICE_ID_HERC_UNI))
7816                 sp->device_type = XFRAME_II_DEVICE;
7817         else
7818                 sp->device_type = XFRAME_I_DEVICE;
7819
7820         sp->lro = lro_enable;
7821
7822         /* Initialize some PCI/PCI-X fields of the NIC. */
7823         s2io_init_pci(sp);
7824
7825         /*
7826          * Setting the device configuration parameters.
7827          * Most of these parameters can be specified by the user during
7828          * module insertion as they are module loadable parameters. If
7829          * these parameters are not not specified during load time, they
7830          * are initialized with default values.
7831          */
7832         mac_control = &sp->mac_control;
7833         config = &sp->config;
7834
7835         config->napi = napi;
7836         config->tx_steering_type = tx_steering_type;
7837
7838         /* Tx side parameters. */
7839         if (config->tx_steering_type == TX_PRIORITY_STEERING)
7840                 config->tx_fifo_num = MAX_TX_FIFOS;
7841         else
7842                 config->tx_fifo_num = tx_fifo_num;
7843
7844         /* Initialize the fifos used for tx steering */
7845         if (config->tx_fifo_num < 5) {
7846                         if (config->tx_fifo_num  == 1)
7847                                 sp->total_tcp_fifos = 1;
7848                         else
7849                                 sp->total_tcp_fifos = config->tx_fifo_num - 1;
7850                         sp->udp_fifo_idx = config->tx_fifo_num - 1;
7851                         sp->total_udp_fifos = 1;
7852                         sp->other_fifo_idx = sp->total_tcp_fifos - 1;
7853         } else {
7854                 sp->total_tcp_fifos = (tx_fifo_num - FIFO_UDP_MAX_NUM -
7855                                                 FIFO_OTHER_MAX_NUM);
7856                 sp->udp_fifo_idx = sp->total_tcp_fifos;
7857                 sp->total_udp_fifos = FIFO_UDP_MAX_NUM;
7858                 sp->other_fifo_idx = sp->udp_fifo_idx + FIFO_UDP_MAX_NUM;
7859         }
7860
7861         config->multiq = dev_multiq;
7862         for (i = 0; i < config->tx_fifo_num; i++) {
7863                 config->tx_cfg[i].fifo_len = tx_fifo_len[i];
7864                 config->tx_cfg[i].fifo_priority = i;
7865         }
7866
7867         /* mapping the QoS priority to the configured fifos */
7868         for (i = 0; i < MAX_TX_FIFOS; i++)
7869                 config->fifo_mapping[i] = fifo_map[config->tx_fifo_num - 1][i];
7870
7871         /* map the hashing selector table to the configured fifos */
7872         for (i = 0; i < config->tx_fifo_num; i++)
7873                 sp->fifo_selector[i] = fifo_selector[i];
7874
7875
7876         config->tx_intr_type = TXD_INT_TYPE_UTILZ;
7877         for (i = 0; i < config->tx_fifo_num; i++) {
7878                 config->tx_cfg[i].f_no_snoop =
7879                     (NO_SNOOP_TXD | NO_SNOOP_TXD_BUFFER);
7880                 if (config->tx_cfg[i].fifo_len < 65) {
7881                         config->tx_intr_type = TXD_INT_TYPE_PER_LIST;
7882                         break;
7883                 }
7884         }
7885         /* + 2 because one Txd for skb->data and one Txd for UFO */
7886         config->max_txds = MAX_SKB_FRAGS + 2;
7887
7888         /* Rx side parameters. */
7889         config->rx_ring_num = rx_ring_num;
7890         for (i = 0; i < config->rx_ring_num; i++) {
7891                 config->rx_cfg[i].num_rxd = rx_ring_sz[i] *
7892                     (rxd_count[sp->rxd_mode] + 1);
7893                 config->rx_cfg[i].ring_priority = i;
7894                 mac_control->rings[i].rx_bufs_left = 0;
7895                 mac_control->rings[i].rxd_mode = sp->rxd_mode;
7896                 mac_control->rings[i].rxd_count = rxd_count[sp->rxd_mode];
7897                 mac_control->rings[i].pdev = sp->pdev;
7898                 mac_control->rings[i].dev = sp->dev;
7899         }
7900
7901         for (i = 0; i < rx_ring_num; i++) {
7902                 config->rx_cfg[i].ring_org = RING_ORG_BUFF1;
7903                 config->rx_cfg[i].f_no_snoop =
7904                     (NO_SNOOP_RXD | NO_SNOOP_RXD_BUFFER);
7905         }
7906
7907         /*  Setting Mac Control parameters */
7908         mac_control->rmac_pause_time = rmac_pause_time;
7909         mac_control->mc_pause_threshold_q0q3 = mc_pause_threshold_q0q3;
7910         mac_control->mc_pause_threshold_q4q7 = mc_pause_threshold_q4q7;
7911
7912
7913         /*  initialize the shared memory used by the NIC and the host */
7914         if (init_shared_mem(sp)) {
7915                 DBG_PRINT(ERR_DBG, "%s: Memory allocation failed\n",
7916                           dev->name);
7917                 ret = -ENOMEM;
7918                 goto mem_alloc_failed;
7919         }
7920
7921         sp->bar0 = ioremap(pci_resource_start(pdev, 0),
7922                                      pci_resource_len(pdev, 0));
7923         if (!sp->bar0) {
7924                 DBG_PRINT(ERR_DBG, "%s: Neterion: cannot remap io mem1\n",
7925                           dev->name);
7926                 ret = -ENOMEM;
7927                 goto bar0_remap_failed;
7928         }
7929
7930         sp->bar1 = ioremap(pci_resource_start(pdev, 2),
7931                                      pci_resource_len(pdev, 2));
7932         if (!sp->bar1) {
7933                 DBG_PRINT(ERR_DBG, "%s: Neterion: cannot remap io mem2\n",
7934                           dev->name);
7935                 ret = -ENOMEM;
7936                 goto bar1_remap_failed;
7937         }
7938
7939         dev->irq = pdev->irq;
7940         dev->base_addr = (unsigned long) sp->bar0;
7941
7942         /* Initializing the BAR1 address as the start of the FIFO pointer. */
7943         for (j = 0; j < MAX_TX_FIFOS; j++) {
7944                 mac_control->tx_FIFO_start[j] = (struct TxFIFO_element __iomem *)
7945                     (sp->bar1 + (j * 0x00020000));
7946         }
7947
7948         /*  Driver entry points */
7949         dev->open = &s2io_open;
7950         dev->stop = &s2io_close;
7951         dev->hard_start_xmit = &s2io_xmit;
7952         dev->get_stats = &s2io_get_stats;
7953         dev->set_multicast_list = &s2io_set_multicast;
7954         dev->do_ioctl = &s2io_ioctl;
7955         dev->set_mac_address = &s2io_set_mac_addr;
7956         dev->change_mtu = &s2io_change_mtu;
7957         SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
7958         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
7959         dev->vlan_rx_register = s2io_vlan_rx_register;
7960         dev->vlan_rx_kill_vid = (void *)s2io_vlan_rx_kill_vid;
7961
7962         /*
7963          * will use eth_mac_addr() for  dev->set_mac_address
7964          * mac address will be set every time dev->open() is called
7965          */
7966 #ifdef CONFIG_NET_POLL_CONTROLLER
7967         dev->poll_controller = s2io_netpoll;
7968 #endif
7969
7970         dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
7971         if (sp->high_dma_flag == TRUE)
7972                 dev->features |= NETIF_F_HIGHDMA;
7973         dev->features |= NETIF_F_TSO;
7974         dev->features |= NETIF_F_TSO6;
7975         if ((sp->device_type & XFRAME_II_DEVICE) && (ufo))  {
7976                 dev->features |= NETIF_F_UFO;
7977                 dev->features |= NETIF_F_HW_CSUM;
7978         }
7979         dev->tx_timeout = &s2io_tx_watchdog;
7980         dev->watchdog_timeo = WATCH_DOG_TIMEOUT;
7981         INIT_WORK(&sp->rst_timer_task, s2io_restart_nic);
7982         INIT_WORK(&sp->set_link_task, s2io_set_link);
7983
7984         pci_save_state(sp->pdev);
7985
7986         /* Setting swapper control on the NIC, for proper reset operation */
7987         if (s2io_set_swapper(sp)) {
7988                 DBG_PRINT(ERR_DBG, "%s:swapper settings are wrong\n",
7989                           dev->name);
7990                 ret = -EAGAIN;
7991                 goto set_swap_failed;
7992         }
7993
7994         /* Verify if the Herc works on the slot its placed into */
7995         if (sp->device_type & XFRAME_II_DEVICE) {
7996                 mode = s2io_verify_pci_mode(sp);
7997                 if (mode < 0) {
7998                         DBG_PRINT(ERR_DBG, "%s: ", __func__);
7999                         DBG_PRINT(ERR_DBG, " Unsupported PCI bus mode\n");
8000                         ret = -EBADSLT;
8001                         goto set_swap_failed;
8002                 }
8003         }
8004
8005         if (sp->config.intr_type == MSI_X) {
8006                 sp->num_entries = config->rx_ring_num + 1;
8007                 ret = s2io_enable_msi_x(sp);
8008
8009                 if (!ret) {
8010                         ret = s2io_test_msi(sp);
8011                         /* rollback MSI-X, will re-enable during add_isr() */
8012                         remove_msix_isr(sp);
8013                 }
8014                 if (ret) {
8015
8016                         DBG_PRINT(ERR_DBG,
8017                           "%s: MSI-X requested but failed to enable\n",
8018                           dev->name);
8019                         sp->config.intr_type = INTA;
8020                 }
8021         }
8022
8023         if (config->intr_type ==  MSI_X) {
8024                 for (i = 0; i < config->rx_ring_num ; i++)
8025                         netif_napi_add(dev, &mac_control->rings[i].napi,
8026                                 s2io_poll_msix, 64);
8027         } else {
8028                 netif_napi_add(dev, &sp->napi, s2io_poll_inta, 64);
8029         }
8030
8031         /* Not needed for Herc */
8032         if (sp->device_type & XFRAME_I_DEVICE) {
8033                 /*
8034                  * Fix for all "FFs" MAC address problems observed on
8035                  * Alpha platforms
8036                  */
8037                 fix_mac_address(sp);
8038                 s2io_reset(sp);
8039         }
8040
8041         /*
8042          * MAC address initialization.
8043          * For now only one mac address will be read and used.
8044          */
8045         bar0 = sp->bar0;
8046         val64 = RMAC_ADDR_CMD_MEM_RD | RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
8047             RMAC_ADDR_CMD_MEM_OFFSET(0 + S2IO_MAC_ADDR_START_OFFSET);
8048         writeq(val64, &bar0->rmac_addr_cmd_mem);
8049         wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
8050                       RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING, S2IO_BIT_RESET);
8051         tmp64 = readq(&bar0->rmac_addr_data0_mem);
8052         mac_down = (u32) tmp64;
8053         mac_up = (u32) (tmp64 >> 32);
8054
8055         sp->def_mac_addr[0].mac_addr[3] = (u8) (mac_up);
8056         sp->def_mac_addr[0].mac_addr[2] = (u8) (mac_up >> 8);
8057         sp->def_mac_addr[0].mac_addr[1] = (u8) (mac_up >> 16);
8058         sp->def_mac_addr[0].mac_addr[0] = (u8) (mac_up >> 24);
8059         sp->def_mac_addr[0].mac_addr[5] = (u8) (mac_down >> 16);
8060         sp->def_mac_addr[0].mac_addr[4] = (u8) (mac_down >> 24);
8061
8062         /*  Set the factory defined MAC address initially   */
8063         dev->addr_len = ETH_ALEN;
8064         memcpy(dev->dev_addr, sp->def_mac_addr, ETH_ALEN);
8065         memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
8066
8067         /* initialize number of multicast & unicast MAC entries variables */
8068         if (sp->device_type == XFRAME_I_DEVICE) {
8069                 config->max_mc_addr = S2IO_XENA_MAX_MC_ADDRESSES;
8070                 config->max_mac_addr = S2IO_XENA_MAX_MAC_ADDRESSES;
8071                 config->mc_start_offset = S2IO_XENA_MC_ADDR_START_OFFSET;
8072         } else if (sp->device_type == XFRAME_II_DEVICE) {
8073                 config->max_mc_addr = S2IO_HERC_MAX_MC_ADDRESSES;
8074                 config->max_mac_addr = S2IO_HERC_MAX_MAC_ADDRESSES;
8075                 config->mc_start_offset = S2IO_HERC_MC_ADDR_START_OFFSET;
8076         }
8077
8078         /* store mac addresses from CAM to s2io_nic structure */
8079         do_s2io_store_unicast_mc(sp);
8080
8081         /* Configure MSIX vector for number of rings configured plus one */
8082         if ((sp->device_type == XFRAME_II_DEVICE) &&
8083                 (config->intr_type == MSI_X))
8084                 sp->num_entries = config->rx_ring_num + 1;
8085
8086          /* Store the values of the MSIX table in the s2io_nic structure */
8087         store_xmsi_data(sp);
8088         /* reset Nic and bring it to known state */
8089         s2io_reset(sp);
8090
8091         /*
8092          * Initialize link state flags
8093          * and the card state parameter
8094          */
8095         sp->state = 0;
8096
8097         /* Initialize spinlocks */
8098         for (i = 0; i < sp->config.tx_fifo_num; i++)
8099                 spin_lock_init(&mac_control->fifos[i].tx_lock);
8100
8101         /*
8102          * SXE-002: Configure link and activity LED to init state
8103          * on driver load.
8104          */
8105         subid = sp->pdev->subsystem_device;
8106         if ((subid & 0xFF) >= 0x07) {
8107                 val64 = readq(&bar0->gpio_control);
8108                 val64 |= 0x0000800000000000ULL;
8109                 writeq(val64, &bar0->gpio_control);
8110                 val64 = 0x0411040400000000ULL;
8111                 writeq(val64, (void __iomem *) bar0 + 0x2700);
8112                 val64 = readq(&bar0->gpio_control);
8113         }
8114
8115         sp->rx_csum = 1;        /* Rx chksum verify enabled by default */
8116
8117         if (register_netdev(dev)) {
8118                 DBG_PRINT(ERR_DBG, "Device registration failed\n");
8119                 ret = -ENODEV;
8120                 goto register_failed;
8121         }
8122         s2io_vpd_read(sp);
8123         DBG_PRINT(ERR_DBG, "Copyright(c) 2002-2007 Neterion Inc.\n");
8124         DBG_PRINT(ERR_DBG, "%s: Neterion %s (rev %d)\n",dev->name,
8125                   sp->product_name, pdev->revision);
8126         DBG_PRINT(ERR_DBG, "%s: Driver version %s\n", dev->name,
8127                   s2io_driver_version);
8128         DBG_PRINT(ERR_DBG, "%s: MAC ADDR: %s\n",
8129                   dev->name, print_mac(mac, dev->dev_addr));
8130         DBG_PRINT(ERR_DBG, "SERIAL NUMBER: %s\n", sp->serial_num);
8131         if (sp->device_type & XFRAME_II_DEVICE) {
8132                 mode = s2io_print_pci_mode(sp);
8133                 if (mode < 0) {
8134                         DBG_PRINT(ERR_DBG, " Unsupported PCI bus mode\n");
8135                         ret = -EBADSLT;
8136                         unregister_netdev(dev);
8137                         goto set_swap_failed;
8138                 }
8139         }
8140         switch(sp->rxd_mode) {
8141                 case RXD_MODE_1:
8142                     DBG_PRINT(ERR_DBG, "%s: 1-Buffer receive mode enabled\n",
8143                                                 dev->name);
8144                     break;
8145                 case RXD_MODE_3B:
8146                     DBG_PRINT(ERR_DBG, "%s: 2-Buffer receive mode enabled\n",
8147                                                 dev->name);
8148                     break;
8149         }
8150
8151         switch (sp->config.napi) {
8152         case 0:
8153                 DBG_PRINT(ERR_DBG, "%s: NAPI disabled\n", dev->name);
8154                 break;
8155         case 1:
8156                 DBG_PRINT(ERR_DBG, "%s: NAPI enabled\n", dev->name);
8157                 break;
8158         }
8159
8160         DBG_PRINT(ERR_DBG, "%s: Using %d Tx fifo(s)\n", dev->name,
8161                 sp->config.tx_fifo_num);
8162
8163         DBG_PRINT(ERR_DBG, "%s: Using %d Rx ring(s)\n", dev->name,
8164                   sp->config.rx_ring_num);
8165
8166         switch(sp->config.intr_type) {
8167                 case INTA:
8168                     DBG_PRINT(ERR_DBG, "%s: Interrupt type INTA\n", dev->name);
8169                     break;
8170                 case MSI_X:
8171                     DBG_PRINT(ERR_DBG, "%s: Interrupt type MSI-X\n", dev->name);
8172                     break;
8173         }
8174         if (sp->config.multiq) {
8175                 for (i = 0; i < sp->config.tx_fifo_num; i++)
8176                         mac_control->fifos[i].multiq = config->multiq;
8177                 DBG_PRINT(ERR_DBG, "%s: Multiqueue support enabled\n",
8178                         dev->name);
8179         } else
8180                 DBG_PRINT(ERR_DBG, "%s: Multiqueue support disabled\n",
8181                         dev->name);
8182
8183         switch (sp->config.tx_steering_type) {
8184         case NO_STEERING:
8185                 DBG_PRINT(ERR_DBG, "%s: No steering enabled for"
8186                         " transmit\n", dev->name);
8187                         break;
8188         case TX_PRIORITY_STEERING:
8189                 DBG_PRINT(ERR_DBG, "%s: Priority steering enabled for"
8190                         " transmit\n", dev->name);
8191                 break;
8192         case TX_DEFAULT_STEERING:
8193                 DBG_PRINT(ERR_DBG, "%s: Default steering enabled for"
8194                         " transmit\n", dev->name);
8195         }
8196
8197         if (sp->lro)
8198                 DBG_PRINT(ERR_DBG, "%s: Large receive offload enabled\n",
8199                           dev->name);
8200         if (ufo)
8201                 DBG_PRINT(ERR_DBG, "%s: UDP Fragmentation Offload(UFO)"
8202                                         " enabled\n", dev->name);
8203         /* Initialize device name */
8204         sprintf(sp->name, "%s Neterion %s", dev->name, sp->product_name);
8205
8206         if (vlan_tag_strip)
8207                 sp->vlan_strip_flag = 1;
8208         else
8209                 sp->vlan_strip_flag = 0;
8210
8211         /*
8212          * Make Link state as off at this point, when the Link change
8213          * interrupt comes the state will be automatically changed to
8214          * the right state.
8215          */
8216         netif_carrier_off(dev);
8217
8218         return 0;
8219
8220       register_failed:
8221       set_swap_failed:
8222         iounmap(sp->bar1);
8223       bar1_remap_failed:
8224         iounmap(sp->bar0);
8225       bar0_remap_failed:
8226       mem_alloc_failed:
8227         free_shared_mem(sp);
8228         pci_disable_device(pdev);
8229         pci_release_regions(pdev);
8230         pci_set_drvdata(pdev, NULL);
8231         free_netdev(dev);
8232
8233         return ret;
8234 }
8235
8236 /**
8237  * s2io_rem_nic - Free the PCI device
8238  * @pdev: structure containing the PCI related information of the device.
8239  * Description: This function is called by the Pci subsystem to release a
8240  * PCI device and free up all resource held up by the device. This could
8241  * be in response to a Hot plug event or when the driver is to be removed
8242  * from memory.
8243  */
8244
8245 static void __devexit s2io_rem_nic(struct pci_dev *pdev)
8246 {
8247         struct net_device *dev =
8248             (struct net_device *) pci_get_drvdata(pdev);
8249         struct s2io_nic *sp;
8250
8251         if (dev == NULL) {
8252                 DBG_PRINT(ERR_DBG, "Driver Data is NULL!!\n");
8253                 return;
8254         }
8255
8256         flush_scheduled_work();
8257
8258         sp = dev->priv;
8259         unregister_netdev(dev);
8260
8261         free_shared_mem(sp);
8262         iounmap(sp->bar0);
8263         iounmap(sp->bar1);
8264         pci_release_regions(pdev);
8265         pci_set_drvdata(pdev, NULL);
8266         free_netdev(dev);
8267         pci_disable_device(pdev);
8268 }
8269
8270 /**
8271  * s2io_starter - Entry point for the driver
8272  * Description: This function is the entry point for the driver. It verifies
8273  * the module loadable parameters and initializes PCI configuration space.
8274  */
8275
8276 static int __init s2io_starter(void)
8277 {
8278         return pci_register_driver(&s2io_driver);
8279 }
8280
8281 /**
8282  * s2io_closer - Cleanup routine for the driver
8283  * Description: This function is the cleanup routine for the driver. It unregist * ers the driver.
8284  */
8285
8286 static __exit void s2io_closer(void)
8287 {
8288         pci_unregister_driver(&s2io_driver);
8289         DBG_PRINT(INIT_DBG, "cleanup done\n");
8290 }
8291
8292 module_init(s2io_starter);
8293 module_exit(s2io_closer);
8294
8295 static int check_L2_lro_capable(u8 *buffer, struct iphdr **ip,
8296                 struct tcphdr **tcp, struct RxD_t *rxdp,
8297                 struct s2io_nic *sp)
8298 {
8299         int ip_off;
8300         u8 l2_type = (u8)((rxdp->Control_1 >> 37) & 0x7), ip_len;
8301
8302         if (!(rxdp->Control_1 & RXD_FRAME_PROTO_TCP)) {
8303                 DBG_PRINT(INIT_DBG,"%s: Non-TCP frames not supported for LRO\n",
8304                           __func__);
8305                 return -1;
8306         }
8307
8308         /* Checking for DIX type or DIX type with VLAN */
8309         if ((l2_type == 0)
8310                 || (l2_type == 4)) {
8311                 ip_off = HEADER_ETHERNET_II_802_3_SIZE;
8312                 /*
8313                  * If vlan stripping is disabled and the frame is VLAN tagged,
8314                  * shift the offset by the VLAN header size bytes.
8315                  */
8316                 if ((!sp->vlan_strip_flag) &&
8317                         (rxdp->Control_1 & RXD_FRAME_VLAN_TAG))
8318                         ip_off += HEADER_VLAN_SIZE;
8319         } else {
8320                 /* LLC, SNAP etc are considered non-mergeable */
8321                 return -1;
8322         }
8323
8324         *ip = (struct iphdr *)((u8 *)buffer + ip_off);
8325         ip_len = (u8)((*ip)->ihl);
8326         ip_len <<= 2;
8327         *tcp = (struct tcphdr *)((unsigned long)*ip + ip_len);
8328
8329         return 0;
8330 }
8331
8332 static int check_for_socket_match(struct lro *lro, struct iphdr *ip,
8333                                   struct tcphdr *tcp)
8334 {
8335         DBG_PRINT(INFO_DBG,"%s: Been here...\n", __func__);
8336         if ((lro->iph->saddr != ip->saddr) || (lro->iph->daddr != ip->daddr) ||
8337            (lro->tcph->source != tcp->source) || (lro->tcph->dest != tcp->dest))
8338                 return -1;
8339         return 0;
8340 }
8341
8342 static inline int get_l4_pyld_length(struct iphdr *ip, struct tcphdr *tcp)
8343 {
8344         return(ntohs(ip->tot_len) - (ip->ihl << 2) - (tcp->doff << 2));
8345 }
8346
8347 static void initiate_new_session(struct lro *lro, u8 *l2h,
8348         struct iphdr *ip, struct tcphdr *tcp, u32 tcp_pyld_len, u16 vlan_tag)
8349 {
8350         DBG_PRINT(INFO_DBG,"%s: Been here...\n", __func__);
8351         lro->l2h = l2h;
8352         lro->iph = ip;
8353         lro->tcph = tcp;
8354         lro->tcp_next_seq = tcp_pyld_len + ntohl(tcp->seq);
8355         lro->tcp_ack = tcp->ack_seq;
8356         lro->sg_num = 1;
8357         lro->total_len = ntohs(ip->tot_len);
8358         lro->frags_len = 0;
8359         lro->vlan_tag = vlan_tag;
8360         /*
8361          * check if we saw TCP timestamp. Other consistency checks have
8362          * already been done.
8363          */
8364         if (tcp->doff == 8) {
8365                 __be32 *ptr;
8366                 ptr = (__be32 *)(tcp+1);
8367                 lro->saw_ts = 1;
8368                 lro->cur_tsval = ntohl(*(ptr+1));
8369                 lro->cur_tsecr = *(ptr+2);
8370         }
8371         lro->in_use = 1;
8372 }
8373
8374 static void update_L3L4_header(struct s2io_nic *sp, struct lro *lro)
8375 {
8376         struct iphdr *ip = lro->iph;
8377         struct tcphdr *tcp = lro->tcph;
8378         __sum16 nchk;
8379         struct stat_block *statinfo = sp->mac_control.stats_info;
8380         DBG_PRINT(INFO_DBG,"%s: Been here...\n", __func__);
8381
8382         /* Update L3 header */
8383         ip->tot_len = htons(lro->total_len);
8384         ip->check = 0;
8385         nchk = ip_fast_csum((u8 *)lro->iph, ip->ihl);
8386         ip->check = nchk;
8387
8388         /* Update L4 header */
8389         tcp->ack_seq = lro->tcp_ack;
8390         tcp->window = lro->window;
8391
8392         /* Update tsecr field if this session has timestamps enabled */
8393         if (lro->saw_ts) {
8394                 __be32 *ptr = (__be32 *)(tcp + 1);
8395                 *(ptr+2) = lro->cur_tsecr;
8396         }
8397
8398         /* Update counters required for calculation of
8399          * average no. of packets aggregated.
8400          */
8401         statinfo->sw_stat.sum_avg_pkts_aggregated += lro->sg_num;
8402         statinfo->sw_stat.num_aggregations++;
8403 }
8404
8405 static void aggregate_new_rx(struct lro *lro, struct iphdr *ip,
8406                 struct tcphdr *tcp, u32 l4_pyld)
8407 {
8408         DBG_PRINT(INFO_DBG,"%s: Been here...\n", __func__);
8409         lro->total_len += l4_pyld;
8410         lro->frags_len += l4_pyld;
8411         lro->tcp_next_seq += l4_pyld;
8412         lro->sg_num++;
8413
8414         /* Update ack seq no. and window ad(from this pkt) in LRO object */
8415         lro->tcp_ack = tcp->ack_seq;
8416         lro->window = tcp->window;
8417
8418         if (lro->saw_ts) {
8419                 __be32 *ptr;
8420                 /* Update tsecr and tsval from this packet */
8421                 ptr = (__be32 *)(tcp+1);
8422                 lro->cur_tsval = ntohl(*(ptr+1));
8423                 lro->cur_tsecr = *(ptr + 2);
8424         }
8425 }
8426
8427 static int verify_l3_l4_lro_capable(struct lro *l_lro, struct iphdr *ip,
8428                                     struct tcphdr *tcp, u32 tcp_pyld_len)
8429 {
8430         u8 *ptr;
8431
8432         DBG_PRINT(INFO_DBG,"%s: Been here...\n", __func__);
8433
8434         if (!tcp_pyld_len) {
8435                 /* Runt frame or a pure ack */
8436                 return -1;
8437         }
8438
8439         if (ip->ihl != 5) /* IP has options */
8440                 return -1;
8441
8442         /* If we see CE codepoint in IP header, packet is not mergeable */
8443         if (INET_ECN_is_ce(ipv4_get_dsfield(ip)))
8444                 return -1;
8445
8446         /* If we see ECE or CWR flags in TCP header, packet is not mergeable */
8447         if (tcp->urg || tcp->psh || tcp->rst || tcp->syn || tcp->fin ||
8448                                     tcp->ece || tcp->cwr || !tcp->ack) {
8449                 /*
8450                  * Currently recognize only the ack control word and
8451                  * any other control field being set would result in
8452                  * flushing the LRO session
8453                  */
8454                 return -1;
8455         }
8456
8457         /*
8458          * Allow only one TCP timestamp option. Don't aggregate if
8459          * any other options are detected.
8460          */
8461         if (tcp->doff != 5 && tcp->doff != 8)
8462                 return -1;
8463
8464         if (tcp->doff == 8) {
8465                 ptr = (u8 *)(tcp + 1);
8466                 while (*ptr == TCPOPT_NOP)
8467                         ptr++;
8468                 if (*ptr != TCPOPT_TIMESTAMP || *(ptr+1) != TCPOLEN_TIMESTAMP)
8469                         return -1;
8470
8471                 /* Ensure timestamp value increases monotonically */
8472                 if (l_lro)
8473                         if (l_lro->cur_tsval > ntohl(*((__be32 *)(ptr+2))))
8474                                 return -1;
8475
8476                 /* timestamp echo reply should be non-zero */
8477                 if (*((__be32 *)(ptr+6)) == 0)
8478                         return -1;
8479         }
8480
8481         return 0;
8482 }
8483
8484 static int
8485 s2io_club_tcp_session(struct ring_info *ring_data, u8 *buffer, u8 **tcp,
8486         u32 *tcp_len, struct lro **lro, struct RxD_t *rxdp,
8487         struct s2io_nic *sp)
8488 {
8489         struct iphdr *ip;
8490         struct tcphdr *tcph;
8491         int ret = 0, i;
8492         u16 vlan_tag = 0;
8493
8494         if (!(ret = check_L2_lro_capable(buffer, &ip, (struct tcphdr **)tcp,
8495                                          rxdp, sp))) {
8496                 DBG_PRINT(INFO_DBG,"IP Saddr: %x Daddr: %x\n",
8497                           ip->saddr, ip->daddr);
8498         } else
8499                 return ret;
8500
8501         vlan_tag = RXD_GET_VLAN_TAG(rxdp->Control_2);
8502         tcph = (struct tcphdr *)*tcp;
8503         *tcp_len = get_l4_pyld_length(ip, tcph);
8504         for (i=0; i<MAX_LRO_SESSIONS; i++) {
8505                 struct lro *l_lro = &ring_data->lro0_n[i];
8506                 if (l_lro->in_use) {
8507                         if (check_for_socket_match(l_lro, ip, tcph))
8508                                 continue;
8509                         /* Sock pair matched */
8510                         *lro = l_lro;
8511
8512                         if ((*lro)->tcp_next_seq != ntohl(tcph->seq)) {
8513                                 DBG_PRINT(INFO_DBG, "%s:Out of order. expected "
8514                                           "0x%x, actual 0x%x\n", __func__,
8515                                           (*lro)->tcp_next_seq,
8516                                           ntohl(tcph->seq));
8517
8518                                 sp->mac_control.stats_info->
8519                                    sw_stat.outof_sequence_pkts++;
8520                                 ret = 2;
8521                                 break;
8522                         }
8523
8524                         if (!verify_l3_l4_lro_capable(l_lro, ip, tcph,*tcp_len))
8525                                 ret = 1; /* Aggregate */
8526                         else
8527                                 ret = 2; /* Flush both */
8528                         break;
8529                 }
8530         }
8531
8532         if (ret == 0) {
8533                 /* Before searching for available LRO objects,
8534                  * check if the pkt is L3/L4 aggregatable. If not
8535                  * don't create new LRO session. Just send this
8536                  * packet up.
8537                  */
8538                 if (verify_l3_l4_lro_capable(NULL, ip, tcph, *tcp_len)) {
8539                         return 5;
8540                 }
8541
8542                 for (i=0; i<MAX_LRO_SESSIONS; i++) {
8543                         struct lro *l_lro = &ring_data->lro0_n[i];
8544                         if (!(l_lro->in_use)) {
8545                                 *lro = l_lro;
8546                                 ret = 3; /* Begin anew */
8547                                 break;
8548                         }
8549                 }
8550         }
8551
8552         if (ret == 0) { /* sessions exceeded */
8553                 DBG_PRINT(INFO_DBG,"%s:All LRO sessions already in use\n",
8554                           __func__);
8555                 *lro = NULL;
8556                 return ret;
8557         }
8558
8559         switch (ret) {
8560                 case 3:
8561                         initiate_new_session(*lro, buffer, ip, tcph, *tcp_len,
8562                                                                 vlan_tag);
8563                         break;
8564                 case 2:
8565                         update_L3L4_header(sp, *lro);
8566                         break;
8567                 case 1:
8568                         aggregate_new_rx(*lro, ip, tcph, *tcp_len);
8569                         if ((*lro)->sg_num == sp->lro_max_aggr_per_sess) {
8570                                 update_L3L4_header(sp, *lro);
8571                                 ret = 4; /* Flush the LRO */
8572                         }
8573                         break;
8574                 default:
8575                         DBG_PRINT(ERR_DBG,"%s:Dont know, can't say!!\n",
8576                                 __func__);
8577                         break;
8578         }
8579
8580         return ret;
8581 }
8582
8583 static void clear_lro_session(struct lro *lro)
8584 {
8585         static u16 lro_struct_size = sizeof(struct lro);
8586
8587         memset(lro, 0, lro_struct_size);
8588 }
8589
8590 static void queue_rx_frame(struct sk_buff *skb, u16 vlan_tag)
8591 {
8592         struct net_device *dev = skb->dev;
8593         struct s2io_nic *sp = dev->priv;
8594
8595         skb->protocol = eth_type_trans(skb, dev);
8596         if (sp->vlgrp && vlan_tag
8597                 && (sp->vlan_strip_flag)) {
8598                 /* Queueing the vlan frame to the upper layer */
8599                 if (sp->config.napi)
8600                         vlan_hwaccel_receive_skb(skb, sp->vlgrp, vlan_tag);
8601                 else
8602                         vlan_hwaccel_rx(skb, sp->vlgrp, vlan_tag);
8603         } else {
8604                 if (sp->config.napi)
8605                         netif_receive_skb(skb);
8606                 else
8607                         netif_rx(skb);
8608         }
8609 }
8610
8611 static void lro_append_pkt(struct s2io_nic *sp, struct lro *lro,
8612                            struct sk_buff *skb,
8613                            u32 tcp_len)
8614 {
8615         struct sk_buff *first = lro->parent;
8616
8617         first->len += tcp_len;
8618         first->data_len = lro->frags_len;
8619         skb_pull(skb, (skb->len - tcp_len));
8620         if (skb_shinfo(first)->frag_list)
8621                 lro->last_frag->next = skb;
8622         else
8623                 skb_shinfo(first)->frag_list = skb;
8624         first->truesize += skb->truesize;
8625         lro->last_frag = skb;
8626         sp->mac_control.stats_info->sw_stat.clubbed_frms_cnt++;
8627         return;
8628 }
8629
8630 /**
8631  * s2io_io_error_detected - called when PCI error is detected
8632  * @pdev: Pointer to PCI device
8633  * @state: The current pci connection state
8634  *
8635  * This function is called after a PCI bus error affecting
8636  * this device has been detected.
8637  */
8638 static pci_ers_result_t s2io_io_error_detected(struct pci_dev *pdev,
8639                                                pci_channel_state_t state)
8640 {
8641         struct net_device *netdev = pci_get_drvdata(pdev);
8642         struct s2io_nic *sp = netdev->priv;
8643
8644         netif_device_detach(netdev);
8645
8646         if (netif_running(netdev)) {
8647                 /* Bring down the card, while avoiding PCI I/O */
8648                 do_s2io_card_down(sp, 0);
8649         }
8650         pci_disable_device(pdev);
8651
8652         return PCI_ERS_RESULT_NEED_RESET;
8653 }
8654
8655 /**
8656  * s2io_io_slot_reset - called after the pci bus has been reset.
8657  * @pdev: Pointer to PCI device
8658  *
8659  * Restart the card from scratch, as if from a cold-boot.
8660  * At this point, the card has exprienced a hard reset,
8661  * followed by fixups by BIOS, and has its config space
8662  * set up identically to what it was at cold boot.
8663  */
8664 static pci_ers_result_t s2io_io_slot_reset(struct pci_dev *pdev)
8665 {
8666         struct net_device *netdev = pci_get_drvdata(pdev);
8667         struct s2io_nic *sp = netdev->priv;
8668
8669         if (pci_enable_device(pdev)) {
8670                 printk(KERN_ERR "s2io: "
8671                        "Cannot re-enable PCI device after reset.\n");
8672                 return PCI_ERS_RESULT_DISCONNECT;
8673         }
8674
8675         pci_set_master(pdev);
8676         s2io_reset(sp);
8677
8678         return PCI_ERS_RESULT_RECOVERED;
8679 }
8680
8681 /**
8682  * s2io_io_resume - called when traffic can start flowing again.
8683  * @pdev: Pointer to PCI device
8684  *
8685  * This callback is called when the error recovery driver tells
8686  * us that its OK to resume normal operation.
8687  */
8688 static void s2io_io_resume(struct pci_dev *pdev)
8689 {
8690         struct net_device *netdev = pci_get_drvdata(pdev);
8691         struct s2io_nic *sp = netdev->priv;
8692
8693         if (netif_running(netdev)) {
8694                 if (s2io_card_up(sp)) {
8695                         printk(KERN_ERR "s2io: "
8696                                "Can't bring device back up after reset.\n");
8697                         return;
8698                 }
8699
8700                 if (s2io_set_mac_addr(netdev, netdev->dev_addr) == FAILURE) {
8701                         s2io_card_down(sp);
8702                         printk(KERN_ERR "s2io: "
8703                                "Can't resetore mac addr after reset.\n");
8704                         return;
8705                 }
8706         }
8707
8708         netif_device_attach(netdev);
8709         netif_tx_wake_all_queues(netdev);
8710 }