drivers/net/myri10ge/myri10ge.c

   1 /*************************************************************************
   2  * myri10ge.c: Myricom Myri-10G Ethernet driver.
   3  *
   4  * Copyright (C) 2005 - 2009 Myricom, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of Myricom, Inc. nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  *
  31  *
  32  * If the eeprom on your board is not recent enough, you will need to get a
  33  * newer firmware image at:
  34  *   http://www.myri.com/scs/download-Myri10GE.html
  35  *
  36  * Contact Information:
  37  *   <help@myri.com>
  38  *   Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006
  39  *************************************************************************/
  40
  41 #include <linux/tcp.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/skbuff.h>
  44 #include <linux/string.h>
  45 #include <linux/module.h>
  46 #include <linux/pci.h>
  47 #include <linux/dma-mapping.h>
  48 #include <linux/etherdevice.h>
  49 #include <linux/if_ether.h>
  50 #include <linux/if_vlan.h>
  51 #include <linux/inet_lro.h>
  52 #include <linux/dca.h>
  53 #include <linux/ip.h>
  54 #include <linux/inet.h>
  55 #include <linux/in.h>
  56 #include <linux/ethtool.h>
  57 #include <linux/firmware.h>
  58 #include <linux/delay.h>
  59 #include <linux/timer.h>
  60 #include <linux/vmalloc.h>
  61 #include <linux/crc32.h>
  62 #include <linux/moduleparam.h>
  63 #include <linux/io.h>
  64 #include <linux/log2.h>
  65 #include <net/checksum.h>
  66 #include <net/ip.h>
  67 #include <net/tcp.h>
  68 #include <asm/byteorder.h>
  69 #include <asm/io.h>
  70 #include <asm/processor.h>
  71 #ifdef CONFIG_MTRR
  72 #include <asm/mtrr.h>
  73 #endif
  74
  75 #include "myri10ge_mcp.h"
  76 #include "myri10ge_mcp_gen_header.h"
  77
  78 #define MYRI10GE_VERSION_STR "1.5.1-1.451"
  79
  80 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
  81 MODULE_AUTHOR("Maintainer: help@myri.com");
  82 MODULE_VERSION(MYRI10GE_VERSION_STR);
  83 MODULE_LICENSE("Dual BSD/GPL");
  84
  85 #define MYRI10GE_MAX_ETHER_MTU 9014
  86
  87 #define MYRI10GE_ETH_STOPPED 0
  88 #define MYRI10GE_ETH_STOPPING 1
  89 #define MYRI10GE_ETH_STARTING 2
  90 #define MYRI10GE_ETH_RUNNING 3
  91 #define MYRI10GE_ETH_OPEN_FAILED 4
  92
  93 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
  94 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
  95 #define MYRI10GE_MAX_LRO_DESCRIPTORS 8
  96 #define MYRI10GE_LRO_MAX_PKTS 64
  97
  98 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
  99 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
 100
 101 #define MYRI10GE_ALLOC_ORDER 0
 102 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
 103 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
 104
 105 #define MYRI10GE_MAX_SLICES 32
 106
 107 struct myri10ge_rx_buffer_state {
 108         struct page *page;
 109         int page_offset;
 110          DECLARE_PCI_UNMAP_ADDR(bus)
 111          DECLARE_PCI_UNMAP_LEN(len)
 112 };
 113
 114 struct myri10ge_tx_buffer_state {
 115         struct sk_buff *skb;
 116         int last;
 117          DECLARE_PCI_UNMAP_ADDR(bus)
 118          DECLARE_PCI_UNMAP_LEN(len)
 119 };
 120
 121 struct myri10ge_cmd {
 122         u32 data0;
 123         u32 data1;
 124         u32 data2;
 125 };
 126
 127 struct myri10ge_rx_buf {
 128         struct mcp_kreq_ether_recv __iomem *lanai;      /* lanai ptr for recv ring */
 129         struct mcp_kreq_ether_recv *shadow;     /* host shadow of recv ring */
 130         struct myri10ge_rx_buffer_state *info;
 131         struct page *page;
 132         dma_addr_t bus;
 133         int page_offset;
 134         int cnt;
 135         int fill_cnt;
 136         int alloc_fail;
 137         int mask;               /* number of rx slots -1 */
 138         int watchdog_needed;
 139 };
 140
 141 struct myri10ge_tx_buf {
 142         struct mcp_kreq_ether_send __iomem *lanai;      /* lanai ptr for sendq */
 143         __be32 __iomem *send_go;        /* "go" doorbell ptr */
 144         __be32 __iomem *send_stop;      /* "stop" doorbell ptr */
 145         struct mcp_kreq_ether_send *req_list;   /* host shadow of sendq */
 146         char *req_bytes;
 147         struct myri10ge_tx_buffer_state *info;
 148         int mask;               /* number of transmit slots -1  */
 149         int req ____cacheline_aligned;  /* transmit slots submitted     */
 150         int pkt_start;          /* packets started */
 151         int stop_queue;
 152         int linearized;
 153         int done ____cacheline_aligned; /* transmit slots completed     */
 154         int pkt_done;           /* packets completed */
 155         int wake_queue;
 156         int queue_active;
 157 };
 158
 159 struct myri10ge_rx_done {
 160         struct mcp_slot *entry;
 161         dma_addr_t bus;
 162         int cnt;
 163         int idx;
 164         struct net_lro_mgr lro_mgr;
 165         struct net_lro_desc lro_desc[MYRI10GE_MAX_LRO_DESCRIPTORS];
 166 };
 167
 168 struct myri10ge_slice_netstats {
 169         unsigned long rx_packets;
 170         unsigned long tx_packets;
 171         unsigned long rx_bytes;
 172         unsigned long tx_bytes;
 173         unsigned long rx_dropped;
 174         unsigned long tx_dropped;
 175 };
 176
 177 struct myri10ge_slice_state {
 178         struct myri10ge_tx_buf tx;      /* transmit ring        */
 179         struct myri10ge_rx_buf rx_small;
 180         struct myri10ge_rx_buf rx_big;
 181         struct myri10ge_rx_done rx_done;
 182         struct net_device *dev;
 183         struct napi_struct napi;
 184         struct myri10ge_priv *mgp;
 185         struct myri10ge_slice_netstats stats;
 186         __be32 __iomem *irq_claim;
 187         struct mcp_irq_data *fw_stats;
 188         dma_addr_t fw_stats_bus;
 189         int watchdog_tx_done;
 190         int watchdog_tx_req;
 191         int watchdog_rx_done;
 192 #ifdef CONFIG_MYRI10GE_DCA
 193         int cached_dca_tag;
 194         int cpu;
 195         __be32 __iomem *dca_tag;
 196 #endif
 197         char irq_desc[32];
 198 };
 199
 200 struct myri10ge_priv {
 201         struct myri10ge_slice_state *ss;
 202         int tx_boundary;        /* boundary transmits cannot cross */
 203         int num_slices;
 204         int running;            /* running?             */
 205         int csum_flag;          /* rx_csums?            */
 206         int small_bytes;
 207         int big_bytes;
 208         int max_intr_slots;
 209         struct net_device *dev;
 210         struct net_device_stats stats;
 211         spinlock_t stats_lock;
 212         u8 __iomem *sram;
 213         int sram_size;
 214         unsigned long board_span;
 215         unsigned long iomem_base;
 216         __be32 __iomem *irq_deassert;
 217         char *mac_addr_string;
 218         struct mcp_cmd_response *cmd;
 219         dma_addr_t cmd_bus;
 220         struct pci_dev *pdev;
 221         int msi_enabled;
 222         int msix_enabled;
 223         struct msix_entry *msix_vectors;
 224 #ifdef CONFIG_MYRI10GE_DCA
 225         int dca_enabled;
 226 #endif
 227         u32 link_state;
 228         unsigned int rdma_tags_available;
 229         int intr_coal_delay;
 230         __be32 __iomem *intr_coal_delay_ptr;
 231         int mtrr;
 232         int wc_enabled;
 233         int down_cnt;
 234         wait_queue_head_t down_wq;
 235         struct work_struct watchdog_work;
 236         struct timer_list watchdog_timer;
 237         int watchdog_resets;
 238         int watchdog_pause;
 239         int pause;
 240         char *fw_name;
 241         char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
 242         char *product_code_string;
 243         char fw_version[128];
 244         int fw_ver_major;
 245         int fw_ver_minor;
 246         int fw_ver_tiny;
 247         int adopted_rx_filter_bug;
 248         u8 mac_addr[6];         /* eeprom mac address */
 249         unsigned long serial_number;
 250         int vendor_specific_offset;
 251         int fw_multicast_support;
 252         unsigned long features;
 253         u32 max_tso6;
 254         u32 read_dma;
 255         u32 write_dma;
 256         u32 read_write_dma;
 257         u32 link_changes;
 258         u32 msg_enable;
 259         unsigned int board_number;
 260         int rebooted;
 261 };
 262
 263 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
 264 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
 265 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
 266 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
 267
 268 static char *myri10ge_fw_name = NULL;
 269 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
 270 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
 271
 272 #define MYRI10GE_MAX_BOARDS 8
 273 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] =
 274     {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL };
 275 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL,
 276                          0444);
 277 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image names per board");
 278
 279 static int myri10ge_ecrc_enable = 1;
 280 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
 281 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
 282
 283 static int myri10ge_small_bytes = -1;   /* -1 == auto */
 284 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
 285 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
 286
 287 static int myri10ge_msi = 1;    /* enable msi by default */
 288 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
 289 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
 290
 291 static int myri10ge_intr_coal_delay = 75;
 292 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
 293 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
 294
 295 static int myri10ge_flow_control = 1;
 296 module_param(myri10ge_flow_control, int, S_IRUGO);
 297 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
 298
 299 static int myri10ge_deassert_wait = 1;
 300 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
 301 MODULE_PARM_DESC(myri10ge_deassert_wait,
 302                  "Wait when deasserting legacy interrupts");
 303
 304 static int myri10ge_force_firmware = 0;
 305 module_param(myri10ge_force_firmware, int, S_IRUGO);
 306 MODULE_PARM_DESC(myri10ge_force_firmware,
 307                  "Force firmware to assume aligned completions");
 308
 309 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
 310 module_param(myri10ge_initial_mtu, int, S_IRUGO);
 311 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
 312
 313 static int myri10ge_napi_weight = 64;
 314 module_param(myri10ge_napi_weight, int, S_IRUGO);
 315 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
 316
 317 static int myri10ge_watchdog_timeout = 1;
 318 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
 319 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
 320
 321 static int myri10ge_max_irq_loops = 1048576;
 322 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
 323 MODULE_PARM_DESC(myri10ge_max_irq_loops,
 324                  "Set stuck legacy IRQ detection threshold");
 325
 326 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
 327
 328 static int myri10ge_debug = -1; /* defaults above */
 329 module_param(myri10ge_debug, int, 0);
 330 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
 331
 332 static int myri10ge_lro_max_pkts = MYRI10GE_LRO_MAX_PKTS;
 333 module_param(myri10ge_lro_max_pkts, int, S_IRUGO);
 334 MODULE_PARM_DESC(myri10ge_lro_max_pkts,
 335                  "Number of LRO packets to be aggregated");
 336
 337 static int myri10ge_fill_thresh = 256;
 338 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
 339 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
 340
 341 static int myri10ge_reset_recover = 1;
 342
 343 static int myri10ge_max_slices = 1;
 344 module_param(myri10ge_max_slices, int, S_IRUGO);
 345 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
 346
 347 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
 348 module_param(myri10ge_rss_hash, int, S_IRUGO);
 349 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
 350
 351 static int myri10ge_dca = 1;
 352 module_param(myri10ge_dca, int, S_IRUGO);
 353 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
 354
 355 #define MYRI10GE_FW_OFFSET 1024*1024
 356 #define MYRI10GE_HIGHPART_TO_U32(X) \
 357 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
 358 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
 359
 360 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
 361
 362 static void myri10ge_set_multicast_list(struct net_device *dev);
 363 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
 364                                          struct net_device *dev);
 365
 366 static inline void put_be32(__be32 val, __be32 __iomem * p)
 367 {
 368         __raw_writel((__force __u32) val, (__force void __iomem *)p);
 369 }
 370
 371 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev);
 372
 373 static int
 374 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
 375                   struct myri10ge_cmd *data, int atomic)
 376 {
 377         struct mcp_cmd *buf;
 378         char buf_bytes[sizeof(*buf) + 8];
 379         struct mcp_cmd_response *response = mgp->cmd;
 380         char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
 381         u32 dma_low, dma_high, result, value;
 382         int sleep_total = 0;
 383
 384         /* ensure buf is aligned to 8 bytes */
 385         buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
 386
 387         buf->data0 = htonl(data->data0);
 388         buf->data1 = htonl(data->data1);
 389         buf->data2 = htonl(data->data2);
 390         buf->cmd = htonl(cmd);
 391         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 392         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 393
 394         buf->response_addr.low = htonl(dma_low);
 395         buf->response_addr.high = htonl(dma_high);
 396         response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
 397         mb();
 398         myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
 399
 400         /* wait up to 15ms. Longest command is the DMA benchmark,
 401          * which is capped at 5ms, but runs from a timeout handler
 402          * that runs every 7.8ms. So a 15ms timeout leaves us with
 403          * a 2.2ms margin
 404          */
 405         if (atomic) {
 406                 /* if atomic is set, do not sleep,
 407                  * and try to get the completion quickly
 408                  * (1ms will be enough for those commands) */
 409                 for (sleep_total = 0;
 410                      sleep_total < 1000
 411                      && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
 412                      sleep_total += 10) {
 413                         udelay(10);
 414                         mb();
 415                 }
 416         } else {
 417                 /* use msleep for most command */
 418                 for (sleep_total = 0;
 419                      sleep_total < 15
 420                      && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
 421                      sleep_total++)
 422                         msleep(1);
 423         }
 424
 425         result = ntohl(response->result);
 426         value = ntohl(response->data);
 427         if (result != MYRI10GE_NO_RESPONSE_RESULT) {
 428                 if (result == 0) {
 429                         data->data0 = value;
 430                         return 0;
 431                 } else if (result == MXGEFW_CMD_UNKNOWN) {
 432                         return -ENOSYS;
 433                 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
 434                         return -E2BIG;
 435                 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
 436                            cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
 437                            (data->
 438                             data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
 439                            0) {
 440                         return -ERANGE;
 441                 } else {
 442                         dev_err(&mgp->pdev->dev,
 443                                 "command %d failed, result = %d\n",
 444                                 cmd, result);
 445                         return -ENXIO;
 446                 }
 447         }
 448
 449         dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
 450                 cmd, result);
 451         return -EAGAIN;
 452 }
 453
 454 /*
 455  * The eeprom strings on the lanaiX have the format
 456  * SN=x\0
 457  * MAC=x:x:x:x:x:x\0
 458  * PT:ddd mmm xx xx:xx:xx xx\0
 459  * PV:ddd mmm xx xx:xx:xx xx\0
 460  */
 461 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
 462 {
 463         char *ptr, *limit;
 464         int i;
 465
 466         ptr = mgp->eeprom_strings;
 467         limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
 468
 469         while (*ptr != '\0' && ptr < limit) {
 470                 if (memcmp(ptr, "MAC=", 4) == 0) {
 471                         ptr += 4;
 472                         mgp->mac_addr_string = ptr;
 473                         for (i = 0; i < 6; i++) {
 474                                 if ((ptr + 2) > limit)
 475                                         goto abort;
 476                                 mgp->mac_addr[i] =
 477                                     simple_strtoul(ptr, &ptr, 16);
 478                                 ptr += 1;
 479                         }
 480                 }
 481                 if (memcmp(ptr, "PC=", 3) == 0) {
 482                         ptr += 3;
 483                         mgp->product_code_string = ptr;
 484                 }
 485                 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
 486                         ptr += 3;
 487                         mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
 488                 }
 489                 while (ptr < limit && *ptr++) ;
 490         }
 491
 492         return 0;
 493
 494 abort:
 495         dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
 496         return -ENXIO;
 497 }
 498
 499 /*
 500  * Enable or disable periodic RDMAs from the host to make certain
 501  * chipsets resend dropped PCIe messages
 502  */
 503
 504 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
 505 {
 506         char __iomem *submit;
 507         __be32 buf[16] __attribute__ ((__aligned__(8)));
 508         u32 dma_low, dma_high;
 509         int i;
 510
 511         /* clear confirmation addr */
 512         mgp->cmd->data = 0;
 513         mb();
 514
 515         /* send a rdma command to the PCIe engine, and wait for the
 516          * response in the confirmation address.  The firmware should
 517          * write a -1 there to indicate it is alive and well
 518          */
 519         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 520         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 521
 522         buf[0] = htonl(dma_high);       /* confirm addr MSW */
 523         buf[1] = htonl(dma_low);        /* confirm addr LSW */
 524         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
 525         buf[3] = htonl(dma_high);       /* dummy addr MSW */
 526         buf[4] = htonl(dma_low);        /* dummy addr LSW */
 527         buf[5] = htonl(enable); /* enable? */
 528
 529         submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
 530
 531         myri10ge_pio_copy(submit, &buf, sizeof(buf));
 532         for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
 533                 msleep(1);
 534         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
 535                 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
 536                         (enable ? "enable" : "disable"));
 537 }
 538
 539 static int
 540 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
 541                            struct mcp_gen_header *hdr)
 542 {
 543         struct device *dev = &mgp->pdev->dev;
 544
 545         /* check firmware type */
 546         if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
 547                 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
 548                 return -EINVAL;
 549         }
 550
 551         /* save firmware version for ethtool */
 552         strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
 553
 554         sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
 555                &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
 556
 557         if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR
 558               && mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
 559                 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
 560                 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
 561                         MXGEFW_VERSION_MINOR);
 562                 return -EINVAL;
 563         }
 564         return 0;
 565 }
 566
 567 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
 568 {
 569         unsigned crc, reread_crc;
 570         const struct firmware *fw;
 571         struct device *dev = &mgp->pdev->dev;
 572         unsigned char *fw_readback;
 573         struct mcp_gen_header *hdr;
 574         size_t hdr_offset;
 575         int status;
 576         unsigned i;
 577
 578         if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
 579                 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
 580                         mgp->fw_name);
 581                 status = -EINVAL;
 582                 goto abort_with_nothing;
 583         }
 584
 585         /* check size */
 586
 587         if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
 588             fw->size < MCP_HEADER_PTR_OFFSET + 4) {
 589                 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
 590                 status = -EINVAL;
 591                 goto abort_with_fw;
 592         }
 593
 594         /* check id */
 595         hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
 596         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
 597                 dev_err(dev, "Bad firmware file\n");
 598                 status = -EINVAL;
 599                 goto abort_with_fw;
 600         }
 601         hdr = (void *)(fw->data + hdr_offset);
 602
 603         status = myri10ge_validate_firmware(mgp, hdr);
 604         if (status != 0)
 605                 goto abort_with_fw;
 606
 607         crc = crc32(~0, fw->data, fw->size);
 608         for (i = 0; i < fw->size; i += 256) {
 609                 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
 610                                   fw->data + i,
 611                                   min(256U, (unsigned)(fw->size - i)));
 612                 mb();
 613                 readb(mgp->sram);
 614         }
 615         fw_readback = vmalloc(fw->size);
 616         if (!fw_readback) {
 617                 status = -ENOMEM;
 618                 goto abort_with_fw;
 619         }
 620         /* corruption checking is good for parity recovery and buggy chipset */
 621         memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
 622         reread_crc = crc32(~0, fw_readback, fw->size);
 623         vfree(fw_readback);
 624         if (crc != reread_crc) {
 625                 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
 626                         (unsigned)fw->size, reread_crc, crc);
 627                 status = -EIO;
 628                 goto abort_with_fw;
 629         }
 630         *size = (u32) fw->size;
 631
 632 abort_with_fw:
 633         release_firmware(fw);
 634
 635 abort_with_nothing:
 636         return status;
 637 }
 638
 639 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
 640 {
 641         struct mcp_gen_header *hdr;
 642         struct device *dev = &mgp->pdev->dev;
 643         const size_t bytes = sizeof(struct mcp_gen_header);
 644         size_t hdr_offset;
 645         int status;
 646
 647         /* find running firmware header */
 648         hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
 649
 650         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
 651                 dev_err(dev, "Running firmware has bad header offset (%d)\n",
 652                         (int)hdr_offset);
 653                 return -EIO;
 654         }
 655
 656         /* copy header of running firmware from SRAM to host memory to
 657          * validate firmware */
 658         hdr = kmalloc(bytes, GFP_KERNEL);
 659         if (hdr == NULL) {
 660                 dev_err(dev, "could not malloc firmware hdr\n");
 661                 return -ENOMEM;
 662         }
 663         memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
 664         status = myri10ge_validate_firmware(mgp, hdr);
 665         kfree(hdr);
 666
 667         /* check to see if adopted firmware has bug where adopting
 668          * it will cause broadcasts to be filtered unless the NIC
 669          * is kept in ALLMULTI mode */
 670         if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
 671             mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
 672                 mgp->adopted_rx_filter_bug = 1;
 673                 dev_warn(dev, "Adopting fw %d.%d.%d: "
 674                          "working around rx filter bug\n",
 675                          mgp->fw_ver_major, mgp->fw_ver_minor,
 676                          mgp->fw_ver_tiny);
 677         }
 678         return status;
 679 }
 680
 681 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
 682 {
 683         struct myri10ge_cmd cmd;
 684         int status;
 685
 686         /* probe for IPv6 TSO support */
 687         mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
 688         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
 689                                    &cmd, 0);
 690         if (status == 0) {
 691                 mgp->max_tso6 = cmd.data0;
 692                 mgp->features |= NETIF_F_TSO6;
 693         }
 694
 695         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
 696         if (status != 0) {
 697                 dev_err(&mgp->pdev->dev,
 698                         "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
 699                 return -ENXIO;
 700         }
 701
 702         mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
 703
 704         return 0;
 705 }
 706
 707 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
 708 {
 709         char __iomem *submit;
 710         __be32 buf[16] __attribute__ ((__aligned__(8)));
 711         u32 dma_low, dma_high, size;
 712         int status, i;
 713
 714         size = 0;
 715         status = myri10ge_load_hotplug_firmware(mgp, &size);
 716         if (status) {
 717                 if (!adopt)
 718                         return status;
 719                 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
 720
 721                 /* Do not attempt to adopt firmware if there
 722                  * was a bad crc */
 723                 if (status == -EIO)
 724                         return status;
 725
 726                 status = myri10ge_adopt_running_firmware(mgp);
 727                 if (status != 0) {
 728                         dev_err(&mgp->pdev->dev,
 729                                 "failed to adopt running firmware\n");
 730                         return status;
 731                 }
 732                 dev_info(&mgp->pdev->dev,
 733                          "Successfully adopted running firmware\n");
 734                 if (mgp->tx_boundary == 4096) {
 735                         dev_warn(&mgp->pdev->dev,
 736                                  "Using firmware currently running on NIC"
 737                                  ".  For optimal\n");
 738                         dev_warn(&mgp->pdev->dev,
 739                                  "performance consider loading optimized "
 740                                  "firmware\n");
 741                         dev_warn(&mgp->pdev->dev, "via hotplug\n");
 742                 }
 743
 744                 mgp->fw_name = "adopted";
 745                 mgp->tx_boundary = 2048;
 746                 myri10ge_dummy_rdma(mgp, 1);
 747                 status = myri10ge_get_firmware_capabilities(mgp);
 748                 return status;
 749         }
 750
 751         /* clear confirmation addr */
 752         mgp->cmd->data = 0;
 753         mb();
 754
 755         /* send a reload command to the bootstrap MCP, and wait for the
 756          *  response in the confirmation address.  The firmware should
 757          * write a -1 there to indicate it is alive and well
 758          */
 759         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 760         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 761
 762         buf[0] = htonl(dma_high);       /* confirm addr MSW */
 763         buf[1] = htonl(dma_low);        /* confirm addr LSW */
 764         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
 765
 766         /* FIX: All newest firmware should un-protect the bottom of
 767          * the sram before handoff. However, the very first interfaces
 768          * do not. Therefore the handoff copy must skip the first 8 bytes
 769          */
 770         buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
 771         buf[4] = htonl(size - 8);       /* length of code */
 772         buf[5] = htonl(8);      /* where to copy to */
 773         buf[6] = htonl(0);      /* where to jump to */
 774
 775         submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
 776
 777         myri10ge_pio_copy(submit, &buf, sizeof(buf));
 778         mb();
 779         msleep(1);
 780         mb();
 781         i = 0;
 782         while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
 783                 msleep(1 << i);
 784                 i++;
 785         }
 786         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
 787                 dev_err(&mgp->pdev->dev, "handoff failed\n");
 788                 return -ENXIO;
 789         }
 790         myri10ge_dummy_rdma(mgp, 1);
 791         status = myri10ge_get_firmware_capabilities(mgp);
 792
 793         return status;
 794 }
 795
 796 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
 797 {
 798         struct myri10ge_cmd cmd;
 799         int status;
 800
 801         cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
 802                      | (addr[2] << 8) | addr[3]);
 803
 804         cmd.data1 = ((addr[4] << 8) | (addr[5]));
 805
 806         status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
 807         return status;
 808 }
 809
 810 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
 811 {
 812         struct myri10ge_cmd cmd;
 813         int status, ctl;
 814
 815         ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
 816         status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
 817
 818         if (status) {
 819                 printk(KERN_ERR
 820                        "myri10ge: %s: Failed to set flow control mode\n",
 821                        mgp->dev->name);
 822                 return status;
 823         }
 824         mgp->pause = pause;
 825         return 0;
 826 }
 827
 828 static void
 829 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
 830 {
 831         struct myri10ge_cmd cmd;
 832         int status, ctl;
 833
 834         ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
 835         status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
 836         if (status)
 837                 printk(KERN_ERR "myri10ge: %s: Failed to set promisc mode\n",
 838                        mgp->dev->name);
 839 }
 840
 841 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
 842 {
 843         struct myri10ge_cmd cmd;
 844         int status;
 845         u32 len;
 846         struct page *dmatest_page;
 847         dma_addr_t dmatest_bus;
 848         char *test = " ";
 849
 850         dmatest_page = alloc_page(GFP_KERNEL);
 851         if (!dmatest_page)
 852                 return -ENOMEM;
 853         dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
 854                                    DMA_BIDIRECTIONAL);
 855
 856         /* Run a small DMA test.
 857          * The magic multipliers to the length tell the firmware
 858          * to do DMA read, write, or read+write tests.  The
 859          * results are returned in cmd.data0.  The upper 16
 860          * bits or the return is the number of transfers completed.
 861          * The lower 16 bits is the time in 0.5us ticks that the
 862          * transfers took to complete.
 863          */
 864
 865         len = mgp->tx_boundary;
 866
 867         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 868         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 869         cmd.data2 = len * 0x10000;
 870         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 871         if (status != 0) {
 872                 test = "read";
 873                 goto abort;
 874         }
 875         mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
 876         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 877         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 878         cmd.data2 = len * 0x1;
 879         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 880         if (status != 0) {
 881                 test = "write";
 882                 goto abort;
 883         }
 884         mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
 885
 886         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 887         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 888         cmd.data2 = len * 0x10001;
 889         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 890         if (status != 0) {
 891                 test = "read/write";
 892                 goto abort;
 893         }
 894         mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
 895             (cmd.data0 & 0xffff);
 896
 897 abort:
 898         pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
 899         put_page(dmatest_page);
 900
 901         if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
 902                 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
 903                          test, status);
 904
 905         return status;
 906 }
 907
 908 static int myri10ge_reset(struct myri10ge_priv *mgp)
 909 {
 910         struct myri10ge_cmd cmd;
 911         struct myri10ge_slice_state *ss;
 912         int i, status;
 913         size_t bytes;
 914 #ifdef CONFIG_MYRI10GE_DCA
 915         unsigned long dca_tag_off;
 916 #endif
 917
 918         /* try to send a reset command to the card to see if it
 919          * is alive */
 920         memset(&cmd, 0, sizeof(cmd));
 921         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
 922         if (status != 0) {
 923                 dev_err(&mgp->pdev->dev, "failed reset\n");
 924                 return -ENXIO;
 925         }
 926
 927         (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
 928         /*
 929          * Use non-ndis mcp_slot (eg, 4 bytes total,
 930          * no toeplitz hash value returned.  Older firmware will
 931          * not understand this command, but will use the correct
 932          * sized mcp_slot, so we ignore error returns
 933          */
 934         cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
 935         (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
 936
 937         /* Now exchange information about interrupts  */
 938
 939         bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
 940         cmd.data0 = (u32) bytes;
 941         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
 942
 943         /*
 944          * Even though we already know how many slices are supported
 945          * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
 946          * has magic side effects, and must be called after a reset.
 947          * It must be called prior to calling any RSS related cmds,
 948          * including assigning an interrupt queue for anything but
 949          * slice 0.  It must also be called *after*
 950          * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
 951          * the firmware to compute offsets.
 952          */
 953
 954         if (mgp->num_slices > 1) {
 955
 956                 /* ask the maximum number of slices it supports */
 957                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
 958                                            &cmd, 0);
 959                 if (status != 0) {
 960                         dev_err(&mgp->pdev->dev,
 961                                 "failed to get number of slices\n");
 962                 }
 963
 964                 /*
 965                  * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
 966                  * to setting up the interrupt queue DMA
 967                  */
 968
 969                 cmd.data0 = mgp->num_slices;
 970                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
 971                 if (mgp->dev->real_num_tx_queues > 1)
 972                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
 973                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
 974                                            &cmd, 0);
 975
 976                 /* Firmware older than 1.4.32 only supports multiple
 977                  * RX queues, so if we get an error, first retry using a
 978                  * single TX queue before giving up */
 979                 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
 980                         mgp->dev->real_num_tx_queues = 1;
 981                         cmd.data0 = mgp->num_slices;
 982                         cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
 983                         status = myri10ge_send_cmd(mgp,
 984                                                    MXGEFW_CMD_ENABLE_RSS_QUEUES,
 985                                                    &cmd, 0);
 986                 }
 987
 988                 if (status != 0) {
 989                         dev_err(&mgp->pdev->dev,
 990                                 "failed to set number of slices\n");
 991
 992                         return status;
 993                 }
 994         }
 995         for (i = 0; i < mgp->num_slices; i++) {
 996                 ss = &mgp->ss[i];
 997                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
 998                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
 999                 cmd.data2 = i;
1000                 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
1001                                             &cmd, 0);
1002         };
1003
1004         status |=
1005             myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
1006         for (i = 0; i < mgp->num_slices; i++) {
1007                 ss = &mgp->ss[i];
1008                 ss->irq_claim =
1009                     (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1010         }
1011         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1012                                     &cmd, 0);
1013         mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1014
1015         status |= myri10ge_send_cmd
1016             (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1017         mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1018         if (status != 0) {
1019                 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1020                 return status;
1021         }
1022         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1023
1024 #ifdef CONFIG_MYRI10GE_DCA
1025         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1026         dca_tag_off = cmd.data0;
1027         for (i = 0; i < mgp->num_slices; i++) {
1028                 ss = &mgp->ss[i];
1029                 if (status == 0) {
1030                         ss->dca_tag = (__iomem __be32 *)
1031                             (mgp->sram + dca_tag_off + 4 * i);
1032                 } else {
1033                         ss->dca_tag = NULL;
1034                 }
1035         }
1036 #endif                          /* CONFIG_MYRI10GE_DCA */
1037
1038         /* reset mcp/driver shared state back to 0 */
1039
1040         mgp->link_changes = 0;
1041         for (i = 0; i < mgp->num_slices; i++) {
1042                 ss = &mgp->ss[i];
1043
1044                 memset(ss->rx_done.entry, 0, bytes);
1045                 ss->tx.req = 0;
1046                 ss->tx.done = 0;
1047                 ss->tx.pkt_start = 0;
1048                 ss->tx.pkt_done = 0;
1049                 ss->rx_big.cnt = 0;
1050                 ss->rx_small.cnt = 0;
1051                 ss->rx_done.idx = 0;
1052                 ss->rx_done.cnt = 0;
1053                 ss->tx.wake_queue = 0;
1054                 ss->tx.stop_queue = 0;
1055         }
1056
1057         status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1058         myri10ge_change_pause(mgp, mgp->pause);
1059         myri10ge_set_multicast_list(mgp->dev);
1060         return status;
1061 }
1062
1063 #ifdef CONFIG_MYRI10GE_DCA
1064 static void
1065 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1066 {
1067         ss->cpu = cpu;
1068         ss->cached_dca_tag = tag;
1069         put_be32(htonl(tag), ss->dca_tag);
1070 }
1071
1072 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1073 {
1074         int cpu = get_cpu();
1075         int tag;
1076
1077         if (cpu != ss->cpu) {
1078                 tag = dca_get_tag(cpu);
1079                 if (ss->cached_dca_tag != tag)
1080                         myri10ge_write_dca(ss, cpu, tag);
1081         }
1082         put_cpu();
1083 }
1084
1085 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1086 {
1087         int err, i;
1088         struct pci_dev *pdev = mgp->pdev;
1089
1090         if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1091                 return;
1092         if (!myri10ge_dca) {
1093                 dev_err(&pdev->dev, "dca disabled by administrator\n");
1094                 return;
1095         }
1096         err = dca_add_requester(&pdev->dev);
1097         if (err) {
1098                 if (err != -ENODEV)
1099                         dev_err(&pdev->dev,
1100                                 "dca_add_requester() failed, err=%d\n", err);
1101                 return;
1102         }
1103         mgp->dca_enabled = 1;
1104         for (i = 0; i < mgp->num_slices; i++)
1105                 myri10ge_write_dca(&mgp->ss[i], -1, 0);
1106 }
1107
1108 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1109 {
1110         struct pci_dev *pdev = mgp->pdev;
1111         int err;
1112
1113         if (!mgp->dca_enabled)
1114                 return;
1115         mgp->dca_enabled = 0;
1116         err = dca_remove_requester(&pdev->dev);
1117 }
1118
1119 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1120 {
1121         struct myri10ge_priv *mgp;
1122         unsigned long event;
1123
1124         mgp = dev_get_drvdata(dev);
1125         event = *(unsigned long *)data;
1126
1127         if (event == DCA_PROVIDER_ADD)
1128                 myri10ge_setup_dca(mgp);
1129         else if (event == DCA_PROVIDER_REMOVE)
1130                 myri10ge_teardown_dca(mgp);
1131         return 0;
1132 }
1133 #endif                          /* CONFIG_MYRI10GE_DCA */
1134
1135 static inline void
1136 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1137                     struct mcp_kreq_ether_recv *src)
1138 {
1139         __be32 low;
1140
1141         low = src->addr_low;
1142         src->addr_low = htonl(DMA_BIT_MASK(32));
1143         myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1144         mb();
1145         myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1146         mb();
1147         src->addr_low = low;
1148         put_be32(low, &dst->addr_low);
1149         mb();
1150 }
1151
1152 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1153 {
1154         struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1155
1156         if ((skb->protocol == htons(ETH_P_8021Q)) &&
1157             (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1158              vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1159                 skb->csum = hw_csum;
1160                 skb->ip_summed = CHECKSUM_COMPLETE;
1161         }
1162 }
1163
1164 static inline void
1165 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
1166                       struct skb_frag_struct *rx_frags, int len, int hlen)
1167 {
1168         struct skb_frag_struct *skb_frags;
1169
1170         skb->len = skb->data_len = len;
1171         skb->truesize = len + sizeof(struct sk_buff);
1172         /* attach the page(s) */
1173
1174         skb_frags = skb_shinfo(skb)->frags;
1175         while (len > 0) {
1176                 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
1177                 len -= rx_frags->size;
1178                 skb_frags++;
1179                 rx_frags++;
1180                 skb_shinfo(skb)->nr_frags++;
1181         }
1182
1183         /* pskb_may_pull is not available in irq context, but
1184          * skb_pull() (for ether_pad and eth_type_trans()) requires
1185          * the beginning of the packet in skb_headlen(), move it
1186          * manually */
1187         skb_copy_to_linear_data(skb, va, hlen);
1188         skb_shinfo(skb)->frags[0].page_offset += hlen;
1189         skb_shinfo(skb)->frags[0].size -= hlen;
1190         skb->data_len -= hlen;
1191         skb->tail += hlen;
1192         skb_pull(skb, MXGEFW_PAD);
1193 }
1194
1195 static void
1196 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1197                         int bytes, int watchdog)
1198 {
1199         struct page *page;
1200         int idx;
1201
1202         if (unlikely(rx->watchdog_needed && !watchdog))
1203                 return;
1204
1205         /* try to refill entire ring */
1206         while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1207                 idx = rx->fill_cnt & rx->mask;
1208                 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1209                         /* we can use part of previous page */
1210                         get_page(rx->page);
1211                 } else {
1212                         /* we need a new page */
1213                         page =
1214                             alloc_pages(GFP_ATOMIC | __GFP_COMP,
1215                                         MYRI10GE_ALLOC_ORDER);
1216                         if (unlikely(page == NULL)) {
1217                                 if (rx->fill_cnt - rx->cnt < 16)
1218                                         rx->watchdog_needed = 1;
1219                                 return;
1220                         }
1221                         rx->page = page;
1222                         rx->page_offset = 0;
1223                         rx->bus = pci_map_page(mgp->pdev, page, 0,
1224                                                MYRI10GE_ALLOC_SIZE,
1225                                                PCI_DMA_FROMDEVICE);
1226                 }
1227                 rx->info[idx].page = rx->page;
1228                 rx->info[idx].page_offset = rx->page_offset;
1229                 /* note that this is the address of the start of the
1230                  * page */
1231                 pci_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1232                 rx->shadow[idx].addr_low =
1233                     htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1234                 rx->shadow[idx].addr_high =
1235                     htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1236
1237                 /* start next packet on a cacheline boundary */
1238                 rx->page_offset += SKB_DATA_ALIGN(bytes);
1239
1240 #if MYRI10GE_ALLOC_SIZE > 4096
1241                 /* don't cross a 4KB boundary */
1242                 if ((rx->page_offset >> 12) !=
1243                     ((rx->page_offset + bytes - 1) >> 12))
1244                         rx->page_offset = (rx->page_offset + 4096) & ~4095;
1245 #endif
1246                 rx->fill_cnt++;
1247
1248                 /* copy 8 descriptors to the firmware at a time */
1249                 if ((idx & 7) == 7) {
1250                         myri10ge_submit_8rx(&rx->lanai[idx - 7],
1251                                             &rx->shadow[idx - 7]);
1252                 }
1253         }
1254 }
1255
1256 static inline void
1257 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1258                        struct myri10ge_rx_buffer_state *info, int bytes)
1259 {
1260         /* unmap the recvd page if we're the only or last user of it */
1261         if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1262             (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1263                 pci_unmap_page(pdev, (pci_unmap_addr(info, bus)
1264                                       & ~(MYRI10GE_ALLOC_SIZE - 1)),
1265                                MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1266         }
1267 }
1268
1269 #define MYRI10GE_HLEN 64        /* The number of bytes to copy from a
1270                                  * page into an skb */
1271
1272 static inline int
1273 myri10ge_rx_done(struct myri10ge_slice_state *ss, struct myri10ge_rx_buf *rx,
1274                  int bytes, int len, __wsum csum)
1275 {
1276         struct myri10ge_priv *mgp = ss->mgp;
1277         struct sk_buff *skb;
1278         struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
1279         int i, idx, hlen, remainder;
1280         struct pci_dev *pdev = mgp->pdev;
1281         struct net_device *dev = mgp->dev;
1282         u8 *va;
1283
1284         len += MXGEFW_PAD;
1285         idx = rx->cnt & rx->mask;
1286         va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1287         prefetch(va);
1288         /* Fill skb_frag_struct(s) with data from our receive */
1289         for (i = 0, remainder = len; remainder > 0; i++) {
1290                 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1291                 rx_frags[i].page = rx->info[idx].page;
1292                 rx_frags[i].page_offset = rx->info[idx].page_offset;
1293                 if (remainder < MYRI10GE_ALLOC_SIZE)
1294                         rx_frags[i].size = remainder;
1295                 else
1296                         rx_frags[i].size = MYRI10GE_ALLOC_SIZE;
1297                 rx->cnt++;
1298                 idx = rx->cnt & rx->mask;
1299                 remainder -= MYRI10GE_ALLOC_SIZE;
1300         }
1301
1302         if (dev->features & NETIF_F_LRO) {
1303                 rx_frags[0].page_offset += MXGEFW_PAD;
1304                 rx_frags[0].size -= MXGEFW_PAD;
1305                 len -= MXGEFW_PAD;
1306                 lro_receive_frags(&ss->rx_done.lro_mgr, rx_frags,
1307                                   /* opaque, will come back in get_frag_header */
1308                                   len, len,
1309                                   (void *)(__force unsigned long)csum, csum);
1310
1311                 return 1;
1312         }
1313
1314         hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1315
1316         /* allocate an skb to attach the page(s) to. This is done
1317          * after trying LRO, so as to avoid skb allocation overheads */
1318
1319         skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1320         if (unlikely(skb == NULL)) {
1321                 ss->stats.rx_dropped++;
1322                 do {
1323                         i--;
1324                         put_page(rx_frags[i].page);
1325                 } while (i != 0);
1326                 return 0;
1327         }
1328
1329         /* Attach the pages to the skb, and trim off any padding */
1330         myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1331         if (skb_shinfo(skb)->frags[0].size <= 0) {
1332                 put_page(skb_shinfo(skb)->frags[0].page);
1333                 skb_shinfo(skb)->nr_frags = 0;
1334         }
1335         skb->protocol = eth_type_trans(skb, dev);
1336         skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1337
1338         if (mgp->csum_flag) {
1339                 if ((skb->protocol == htons(ETH_P_IP)) ||
1340                     (skb->protocol == htons(ETH_P_IPV6))) {
1341                         skb->csum = csum;
1342                         skb->ip_summed = CHECKSUM_COMPLETE;
1343                 } else
1344                         myri10ge_vlan_ip_csum(skb, csum);
1345         }
1346         netif_receive_skb(skb);
1347         return 1;
1348 }
1349
1350 static inline void
1351 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1352 {
1353         struct pci_dev *pdev = ss->mgp->pdev;
1354         struct myri10ge_tx_buf *tx = &ss->tx;
1355         struct netdev_queue *dev_queue;
1356         struct sk_buff *skb;
1357         int idx, len;
1358
1359         while (tx->pkt_done != mcp_index) {
1360                 idx = tx->done & tx->mask;
1361                 skb = tx->info[idx].skb;
1362
1363                 /* Mark as free */
1364                 tx->info[idx].skb = NULL;
1365                 if (tx->info[idx].last) {
1366                         tx->pkt_done++;
1367                         tx->info[idx].last = 0;
1368                 }
1369                 tx->done++;
1370                 len = pci_unmap_len(&tx->info[idx], len);
1371                 pci_unmap_len_set(&tx->info[idx], len, 0);
1372                 if (skb) {
1373                         ss->stats.tx_bytes += skb->len;
1374                         ss->stats.tx_packets++;
1375                         dev_kfree_skb_irq(skb);
1376                         if (len)
1377                                 pci_unmap_single(pdev,
1378                                                  pci_unmap_addr(&tx->info[idx],
1379                                                                 bus), len,
1380                                                  PCI_DMA_TODEVICE);
1381                 } else {
1382                         if (len)
1383                                 pci_unmap_page(pdev,
1384                                                pci_unmap_addr(&tx->info[idx],
1385                                                               bus), len,
1386                                                PCI_DMA_TODEVICE);
1387                 }
1388         }
1389
1390         dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1391         /*
1392          * Make a minimal effort to prevent the NIC from polling an
1393          * idle tx queue.  If we can't get the lock we leave the queue
1394          * active. In this case, either a thread was about to start
1395          * using the queue anyway, or we lost a race and the NIC will
1396          * waste some of its resources polling an inactive queue for a
1397          * while.
1398          */
1399
1400         if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1401             __netif_tx_trylock(dev_queue)) {
1402                 if (tx->req == tx->done) {
1403                         tx->queue_active = 0;
1404                         put_be32(htonl(1), tx->send_stop);
1405                         mb();
1406                         mmiowb();
1407                 }
1408                 __netif_tx_unlock(dev_queue);
1409         }
1410
1411         /* start the queue if we've stopped it */
1412         if (netif_tx_queue_stopped(dev_queue)
1413             && tx->req - tx->done < (tx->mask >> 1)) {
1414                 tx->wake_queue++;
1415                 netif_tx_wake_queue(dev_queue);
1416         }
1417 }
1418
1419 static inline int
1420 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1421 {
1422         struct myri10ge_rx_done *rx_done = &ss->rx_done;
1423         struct myri10ge_priv *mgp = ss->mgp;
1424         struct net_device *netdev = mgp->dev;
1425         unsigned long rx_bytes = 0;
1426         unsigned long rx_packets = 0;
1427         unsigned long rx_ok;
1428
1429         int idx = rx_done->idx;
1430         int cnt = rx_done->cnt;
1431         int work_done = 0;
1432         u16 length;
1433         __wsum checksum;
1434
1435         while (rx_done->entry[idx].length != 0 && work_done < budget) {
1436                 length = ntohs(rx_done->entry[idx].length);
1437                 rx_done->entry[idx].length = 0;
1438                 checksum = csum_unfold(rx_done->entry[idx].checksum);
1439                 if (length <= mgp->small_bytes)
1440                         rx_ok = myri10ge_rx_done(ss, &ss->rx_small,
1441                                                  mgp->small_bytes,
1442                                                  length, checksum);
1443                 else
1444                         rx_ok = myri10ge_rx_done(ss, &ss->rx_big,
1445                                                  mgp->big_bytes,
1446                                                  length, checksum);
1447                 rx_packets += rx_ok;
1448                 rx_bytes += rx_ok * (unsigned long)length;
1449                 cnt++;
1450                 idx = cnt & (mgp->max_intr_slots - 1);
1451                 work_done++;
1452         }
1453         rx_done->idx = idx;
1454         rx_done->cnt = cnt;
1455         ss->stats.rx_packets += rx_packets;
1456         ss->stats.rx_bytes += rx_bytes;
1457
1458         if (netdev->features & NETIF_F_LRO)
1459                 lro_flush_all(&rx_done->lro_mgr);
1460
1461         /* restock receive rings if needed */
1462         if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1463                 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1464                                         mgp->small_bytes + MXGEFW_PAD, 0);
1465         if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1466                 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1467
1468         return work_done;
1469 }
1470
1471 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1472 {
1473         struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1474
1475         if (unlikely(stats->stats_updated)) {
1476                 unsigned link_up = ntohl(stats->link_up);
1477                 if (mgp->link_state != link_up) {
1478                         mgp->link_state = link_up;
1479
1480                         if (mgp->link_state == MXGEFW_LINK_UP) {
1481                                 if (netif_msg_link(mgp))
1482                                         printk(KERN_INFO
1483                                                "myri10ge: %s: link up\n",
1484                                                mgp->dev->name);
1485                                 netif_carrier_on(mgp->dev);
1486                                 mgp->link_changes++;
1487                         } else {
1488                                 if (netif_msg_link(mgp))
1489                                         printk(KERN_INFO
1490                                                "myri10ge: %s: link %s\n",
1491                                                mgp->dev->name,
1492                                                (link_up == MXGEFW_LINK_MYRINET ?
1493                                                 "mismatch (Myrinet detected)" :
1494                                                 "down"));
1495                                 netif_carrier_off(mgp->dev);
1496                                 mgp->link_changes++;
1497                         }
1498                 }
1499                 if (mgp->rdma_tags_available !=
1500                     ntohl(stats->rdma_tags_available)) {
1501                         mgp->rdma_tags_available =
1502                             ntohl(stats->rdma_tags_available);
1503                         printk(KERN_WARNING "myri10ge: %s: RDMA timed out! "
1504                                "%d tags left\n", mgp->dev->name,
1505                                mgp->rdma_tags_available);
1506                 }
1507                 mgp->down_cnt += stats->link_down;
1508                 if (stats->link_down)
1509                         wake_up(&mgp->down_wq);
1510         }
1511 }
1512
1513 static int myri10ge_poll(struct napi_struct *napi, int budget)
1514 {
1515         struct myri10ge_slice_state *ss =
1516             container_of(napi, struct myri10ge_slice_state, napi);
1517         int work_done;
1518
1519 #ifdef CONFIG_MYRI10GE_DCA
1520         if (ss->mgp->dca_enabled)
1521                 myri10ge_update_dca(ss);
1522 #endif
1523
1524         /* process as many rx events as NAPI will allow */
1525         work_done = myri10ge_clean_rx_done(ss, budget);
1526
1527         if (work_done < budget) {
1528                 napi_complete(napi);
1529                 put_be32(htonl(3), ss->irq_claim);
1530         }
1531         return work_done;
1532 }
1533
1534 static irqreturn_t myri10ge_intr(int irq, void *arg)
1535 {
1536         struct myri10ge_slice_state *ss = arg;
1537         struct myri10ge_priv *mgp = ss->mgp;
1538         struct mcp_irq_data *stats = ss->fw_stats;
1539         struct myri10ge_tx_buf *tx = &ss->tx;
1540         u32 send_done_count;
1541         int i;
1542
1543         /* an interrupt on a non-zero receive-only slice is implicitly
1544          * valid  since MSI-X irqs are not shared */
1545         if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) {
1546                 napi_schedule(&ss->napi);
1547                 return (IRQ_HANDLED);
1548         }
1549
1550         /* make sure it is our IRQ, and that the DMA has finished */
1551         if (unlikely(!stats->valid))
1552                 return (IRQ_NONE);
1553
1554         /* low bit indicates receives are present, so schedule
1555          * napi poll handler */
1556         if (stats->valid & 1)
1557                 napi_schedule(&ss->napi);
1558
1559         if (!mgp->msi_enabled && !mgp->msix_enabled) {
1560                 put_be32(0, mgp->irq_deassert);
1561                 if (!myri10ge_deassert_wait)
1562                         stats->valid = 0;
1563                 mb();
1564         } else
1565                 stats->valid = 0;
1566
1567         /* Wait for IRQ line to go low, if using INTx */
1568         i = 0;
1569         while (1) {
1570                 i++;
1571                 /* check for transmit completes and receives */
1572                 send_done_count = ntohl(stats->send_done_count);
1573                 if (send_done_count != tx->pkt_done)
1574                         myri10ge_tx_done(ss, (int)send_done_count);
1575                 if (unlikely(i > myri10ge_max_irq_loops)) {
1576                         printk(KERN_WARNING "myri10ge: %s: irq stuck?\n",
1577                                mgp->dev->name);
1578                         stats->valid = 0;
1579                         schedule_work(&mgp->watchdog_work);
1580                 }
1581                 if (likely(stats->valid == 0))
1582                         break;
1583                 cpu_relax();
1584                 barrier();
1585         }
1586
1587         /* Only slice 0 updates stats */
1588         if (ss == mgp->ss)
1589                 myri10ge_check_statblock(mgp);
1590
1591         put_be32(htonl(3), ss->irq_claim + 1);
1592         return (IRQ_HANDLED);
1593 }
1594
1595 static int
1596 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1597 {
1598         struct myri10ge_priv *mgp = netdev_priv(netdev);
1599         char *ptr;
1600         int i;
1601
1602         cmd->autoneg = AUTONEG_DISABLE;
1603         cmd->speed = SPEED_10000;
1604         cmd->duplex = DUPLEX_FULL;
1605
1606         /*
1607          * parse the product code to deterimine the interface type
1608          * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1609          * after the 3rd dash in the driver's cached copy of the
1610          * EEPROM's product code string.
1611          */
1612         ptr = mgp->product_code_string;
1613         if (ptr == NULL) {
1614                 printk(KERN_ERR "myri10ge: %s: Missing product code\n",
1615                        netdev->name);
1616                 return 0;
1617         }
1618         for (i = 0; i < 3; i++, ptr++) {
1619                 ptr = strchr(ptr, '-');
1620                 if (ptr == NULL) {
1621                         printk(KERN_ERR "myri10ge: %s: Invalid product "
1622                                "code %s\n", netdev->name,
1623                                mgp->product_code_string);
1624                         return 0;
1625                 }
1626         }
1627         if (*ptr == '2')
1628                 ptr++;
1629         if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') {
1630                 /* We've found either an XFP, quad ribbon fiber, or SFP+ */
1631                 cmd->port = PORT_FIBRE;
1632                 cmd->supported |= SUPPORTED_FIBRE;
1633                 cmd->advertising |= ADVERTISED_FIBRE;
1634         } else {
1635                 cmd->port = PORT_OTHER;
1636         }
1637         if (*ptr == 'R' || *ptr == 'S')
1638                 cmd->transceiver = XCVR_EXTERNAL;
1639         else
1640                 cmd->transceiver = XCVR_INTERNAL;
1641
1642         return 0;
1643 }
1644
1645 static void
1646 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1647 {
1648         struct myri10ge_priv *mgp = netdev_priv(netdev);
1649
1650         strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1651         strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1652         strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1653         strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1654 }
1655
1656 static int
1657 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1658 {
1659         struct myri10ge_priv *mgp = netdev_priv(netdev);
1660
1661         coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1662         return 0;
1663 }
1664
1665 static int
1666 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1667 {
1668         struct myri10ge_priv *mgp = netdev_priv(netdev);
1669
1670         mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1671         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1672         return 0;
1673 }
1674
1675 static void
1676 myri10ge_get_pauseparam(struct net_device *netdev,
1677                         struct ethtool_pauseparam *pause)
1678 {
1679         struct myri10ge_priv *mgp = netdev_priv(netdev);
1680
1681         pause->autoneg = 0;
1682         pause->rx_pause = mgp->pause;
1683         pause->tx_pause = mgp->pause;
1684 }
1685
1686 static int
1687 myri10ge_set_pauseparam(struct net_device *netdev,
1688                         struct ethtool_pauseparam *pause)
1689 {
1690         struct myri10ge_priv *mgp = netdev_priv(netdev);
1691
1692         if (pause->tx_pause != mgp->pause)
1693                 return myri10ge_change_pause(mgp, pause->tx_pause);
1694         if (pause->rx_pause != mgp->pause)
1695                 return myri10ge_change_pause(mgp, pause->tx_pause);
1696         if (pause->autoneg != 0)
1697                 return -EINVAL;
1698         return 0;
1699 }
1700
1701 static void
1702 myri10ge_get_ringparam(struct net_device *netdev,
1703                        struct ethtool_ringparam *ring)
1704 {
1705         struct myri10ge_priv *mgp = netdev_priv(netdev);
1706
1707         ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1708         ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1709         ring->rx_jumbo_max_pending = 0;
1710         ring->tx_max_pending = mgp->ss[0].tx.mask + 1;
1711         ring->rx_mini_pending = ring->rx_mini_max_pending;
1712         ring->rx_pending = ring->rx_max_pending;
1713         ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1714         ring->tx_pending = ring->tx_max_pending;
1715 }
1716
1717 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1718 {
1719         struct myri10ge_priv *mgp = netdev_priv(netdev);
1720
1721         if (mgp->csum_flag)
1722                 return 1;
1723         else
1724                 return 0;
1725 }
1726
1727 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1728 {
1729         struct myri10ge_priv *mgp = netdev_priv(netdev);
1730         int err = 0;
1731
1732         if (csum_enabled)
1733                 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1734         else {
1735                 u32 flags = ethtool_op_get_flags(netdev);
1736                 err = ethtool_op_set_flags(netdev, (flags & ~ETH_FLAG_LRO));
1737                 mgp->csum_flag = 0;
1738
1739         }
1740         return err;
1741 }
1742
1743 static int myri10ge_set_tso(struct net_device *netdev, u32 tso_enabled)
1744 {
1745         struct myri10ge_priv *mgp = netdev_priv(netdev);
1746         unsigned long flags = mgp->features & (NETIF_F_TSO6 | NETIF_F_TSO);
1747
1748         if (tso_enabled)
1749                 netdev->features |= flags;
1750         else
1751                 netdev->features &= ~flags;
1752         return 0;
1753 }
1754
1755 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1756         "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1757         "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1758         "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1759         "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1760         "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1761         "tx_heartbeat_errors", "tx_window_errors",
1762         /* device-specific stats */
1763         "tx_boundary", "WC", "irq", "MSI", "MSIX",
1764         "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1765         "serial_number", "watchdog_resets",
1766 #ifdef CONFIG_MYRI10GE_DCA
1767         "dca_capable_firmware", "dca_device_present",
1768 #endif
1769         "link_changes", "link_up", "dropped_link_overflow",
1770         "dropped_link_error_or_filtered",
1771         "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1772         "dropped_unicast_filtered", "dropped_multicast_filtered",
1773         "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1774         "dropped_no_big_buffer"
1775 };
1776
1777 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1778         "----------- slice ---------",
1779         "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1780         "rx_small_cnt", "rx_big_cnt",
1781         "wake_queue", "stop_queue", "tx_linearized", "LRO aggregated",
1782             "LRO flushed",
1783         "LRO avg aggr", "LRO no_desc"
1784 };
1785
1786 #define MYRI10GE_NET_STATS_LEN      21
1787 #define MYRI10GE_MAIN_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_main_stats)
1788 #define MYRI10GE_SLICE_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1789
1790 static void
1791 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1792 {
1793         struct myri10ge_priv *mgp = netdev_priv(netdev);
1794         int i;
1795
1796         switch (stringset) {
1797         case ETH_SS_STATS:
1798                 memcpy(data, *myri10ge_gstrings_main_stats,
1799                        sizeof(myri10ge_gstrings_main_stats));
1800                 data += sizeof(myri10ge_gstrings_main_stats);
1801                 for (i = 0; i < mgp->num_slices; i++) {
1802                         memcpy(data, *myri10ge_gstrings_slice_stats,
1803                                sizeof(myri10ge_gstrings_slice_stats));
1804                         data += sizeof(myri10ge_gstrings_slice_stats);
1805                 }
1806                 break;
1807         }
1808 }
1809
1810 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1811 {
1812         struct myri10ge_priv *mgp = netdev_priv(netdev);
1813
1814         switch (sset) {
1815         case ETH_SS_STATS:
1816                 return MYRI10GE_MAIN_STATS_LEN +
1817                     mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1818         default:
1819                 return -EOPNOTSUPP;
1820         }
1821 }
1822
1823 static void
1824 myri10ge_get_ethtool_stats(struct net_device *netdev,
1825                            struct ethtool_stats *stats, u64 * data)
1826 {
1827         struct myri10ge_priv *mgp = netdev_priv(netdev);
1828         struct myri10ge_slice_state *ss;
1829         int slice;
1830         int i;
1831
1832         /* force stats update */
1833         (void)myri10ge_get_stats(netdev);
1834         for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1835                 data[i] = ((unsigned long *)&mgp->stats)[i];
1836
1837         data[i++] = (unsigned int)mgp->tx_boundary;
1838         data[i++] = (unsigned int)mgp->wc_enabled;
1839         data[i++] = (unsigned int)mgp->pdev->irq;
1840         data[i++] = (unsigned int)mgp->msi_enabled;
1841         data[i++] = (unsigned int)mgp->msix_enabled;
1842         data[i++] = (unsigned int)mgp->read_dma;
1843         data[i++] = (unsigned int)mgp->write_dma;
1844         data[i++] = (unsigned int)mgp->read_write_dma;
1845         data[i++] = (unsigned int)mgp->serial_number;
1846         data[i++] = (unsigned int)mgp->watchdog_resets;
1847 #ifdef CONFIG_MYRI10GE_DCA
1848         data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1849         data[i++] = (unsigned int)(mgp->dca_enabled);
1850 #endif
1851         data[i++] = (unsigned int)mgp->link_changes;
1852
1853         /* firmware stats are useful only in the first slice */
1854         ss = &mgp->ss[0];
1855         data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1856         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1857         data[i++] =
1858             (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1859         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1860         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1861         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1862         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1863         data[i++] =
1864             (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1865         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1866         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1867         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1868         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1869
1870         for (slice = 0; slice < mgp->num_slices; slice++) {
1871                 ss = &mgp->ss[slice];
1872                 data[i++] = slice;
1873                 data[i++] = (unsigned int)ss->tx.pkt_start;
1874                 data[i++] = (unsigned int)ss->tx.pkt_done;
1875                 data[i++] = (unsigned int)ss->tx.req;
1876                 data[i++] = (unsigned int)ss->tx.done;
1877                 data[i++] = (unsigned int)ss->rx_small.cnt;
1878                 data[i++] = (unsigned int)ss->rx_big.cnt;
1879                 data[i++] = (unsigned int)ss->tx.wake_queue;
1880                 data[i++] = (unsigned int)ss->tx.stop_queue;
1881                 data[i++] = (unsigned int)ss->tx.linearized;
1882                 data[i++] = ss->rx_done.lro_mgr.stats.aggregated;
1883                 data[i++] = ss->rx_done.lro_mgr.stats.flushed;
1884                 if (ss->rx_done.lro_mgr.stats.flushed)
1885                         data[i++] = ss->rx_done.lro_mgr.stats.aggregated /
1886                             ss->rx_done.lro_mgr.stats.flushed;
1887                 else
1888                         data[i++] = 0;
1889                 data[i++] = ss->rx_done.lro_mgr.stats.no_desc;
1890         }
1891 }
1892
1893 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1894 {
1895         struct myri10ge_priv *mgp = netdev_priv(netdev);
1896         mgp->msg_enable = value;
1897 }
1898
1899 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1900 {
1901         struct myri10ge_priv *mgp = netdev_priv(netdev);
1902         return mgp->msg_enable;
1903 }
1904
1905 static const struct ethtool_ops myri10ge_ethtool_ops = {
1906         .get_settings = myri10ge_get_settings,
1907         .get_drvinfo = myri10ge_get_drvinfo,
1908         .get_coalesce = myri10ge_get_coalesce,
1909         .set_coalesce = myri10ge_set_coalesce,
1910         .get_pauseparam = myri10ge_get_pauseparam,
1911         .set_pauseparam = myri10ge_set_pauseparam,
1912         .get_ringparam = myri10ge_get_ringparam,
1913         .get_rx_csum = myri10ge_get_rx_csum,
1914         .set_rx_csum = myri10ge_set_rx_csum,
1915         .set_tx_csum = ethtool_op_set_tx_hw_csum,
1916         .set_sg = ethtool_op_set_sg,
1917         .set_tso = myri10ge_set_tso,
1918         .get_link = ethtool_op_get_link,
1919         .get_strings = myri10ge_get_strings,
1920         .get_sset_count = myri10ge_get_sset_count,
1921         .get_ethtool_stats = myri10ge_get_ethtool_stats,
1922         .set_msglevel = myri10ge_set_msglevel,
1923         .get_msglevel = myri10ge_get_msglevel,
1924         .get_flags = ethtool_op_get_flags,
1925         .set_flags = ethtool_op_set_flags
1926 };
1927
1928 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1929 {
1930         struct myri10ge_priv *mgp = ss->mgp;
1931         struct myri10ge_cmd cmd;
1932         struct net_device *dev = mgp->dev;
1933         int tx_ring_size, rx_ring_size;
1934         int tx_ring_entries, rx_ring_entries;
1935         int i, slice, status;
1936         size_t bytes;
1937
1938         /* get ring sizes */
1939         slice = ss - mgp->ss;
1940         cmd.data0 = slice;
1941         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1942         tx_ring_size = cmd.data0;
1943         cmd.data0 = slice;
1944         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1945         if (status != 0)
1946                 return status;
1947         rx_ring_size = cmd.data0;
1948
1949         tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1950         rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1951         ss->tx.mask = tx_ring_entries - 1;
1952         ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
1953
1954         status = -ENOMEM;
1955
1956         /* allocate the host shadow rings */
1957
1958         bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1959             * sizeof(*ss->tx.req_list);
1960         ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1961         if (ss->tx.req_bytes == NULL)
1962                 goto abort_with_nothing;
1963
1964         /* ensure req_list entries are aligned to 8 bytes */
1965         ss->tx.req_list = (struct mcp_kreq_ether_send *)
1966             ALIGN((unsigned long)ss->tx.req_bytes, 8);
1967         ss->tx.queue_active = 0;
1968
1969         bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
1970         ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1971         if (ss->rx_small.shadow == NULL)
1972                 goto abort_with_tx_req_bytes;
1973
1974         bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
1975         ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1976         if (ss->rx_big.shadow == NULL)
1977                 goto abort_with_rx_small_shadow;
1978
1979         /* allocate the host info rings */
1980
1981         bytes = tx_ring_entries * sizeof(*ss->tx.info);
1982         ss->tx.info = kzalloc(bytes, GFP_KERNEL);
1983         if (ss->tx.info == NULL)
1984                 goto abort_with_rx_big_shadow;
1985
1986         bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
1987         ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1988         if (ss->rx_small.info == NULL)
1989                 goto abort_with_tx_info;
1990
1991         bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
1992         ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
1993         if (ss->rx_big.info == NULL)
1994                 goto abort_with_rx_small_info;
1995
1996         /* Fill the receive rings */
1997         ss->rx_big.cnt = 0;
1998         ss->rx_small.cnt = 0;
1999         ss->rx_big.fill_cnt = 0;
2000         ss->rx_small.fill_cnt = 0;
2001         ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
2002         ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
2003         ss->rx_small.watchdog_needed = 0;
2004         ss->rx_big.watchdog_needed = 0;
2005         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
2006                                 mgp->small_bytes + MXGEFW_PAD, 0);
2007
2008         if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
2009                 printk(KERN_ERR
2010                        "myri10ge: %s:slice-%d: alloced only %d small bufs\n",
2011                        dev->name, slice, ss->rx_small.fill_cnt);
2012                 goto abort_with_rx_small_ring;
2013         }
2014
2015         myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
2016         if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
2017                 printk(KERN_ERR
2018                        "myri10ge: %s:slice-%d: alloced only %d big bufs\n",
2019                        dev->name, slice, ss->rx_big.fill_cnt);
2020                 goto abort_with_rx_big_ring;
2021         }
2022
2023         return 0;
2024
2025 abort_with_rx_big_ring:
2026         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2027                 int idx = i & ss->rx_big.mask;
2028                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2029                                        mgp->big_bytes);
2030                 put_page(ss->rx_big.info[idx].page);
2031         }
2032
2033 abort_with_rx_small_ring:
2034         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2035                 int idx = i & ss->rx_small.mask;
2036                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2037                                        mgp->small_bytes + MXGEFW_PAD);
2038                 put_page(ss->rx_small.info[idx].page);
2039         }
2040
2041         kfree(ss->rx_big.info);
2042
2043 abort_with_rx_small_info:
2044         kfree(ss->rx_small.info);
2045
2046 abort_with_tx_info:
2047         kfree(ss->tx.info);
2048
2049 abort_with_rx_big_shadow:
2050         kfree(ss->rx_big.shadow);
2051
2052 abort_with_rx_small_shadow:
2053         kfree(ss->rx_small.shadow);
2054
2055 abort_with_tx_req_bytes:
2056         kfree(ss->tx.req_bytes);
2057         ss->tx.req_bytes = NULL;
2058         ss->tx.req_list = NULL;
2059
2060 abort_with_nothing:
2061         return status;
2062 }
2063
2064 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2065 {
2066         struct myri10ge_priv *mgp = ss->mgp;
2067         struct sk_buff *skb;
2068         struct myri10ge_tx_buf *tx;
2069         int i, len, idx;
2070
2071         /* If not allocated, skip it */
2072         if (ss->tx.req_list == NULL)
2073                 return;
2074
2075         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2076                 idx = i & ss->rx_big.mask;
2077                 if (i == ss->rx_big.fill_cnt - 1)
2078                         ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2079                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2080                                        mgp->big_bytes);
2081                 put_page(ss->rx_big.info[idx].page);
2082         }
2083
2084         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2085                 idx = i & ss->rx_small.mask;
2086                 if (i == ss->rx_small.fill_cnt - 1)
2087                         ss->rx_small.info[idx].page_offset =
2088                             MYRI10GE_ALLOC_SIZE;
2089                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2090                                        mgp->small_bytes + MXGEFW_PAD);
2091                 put_page(ss->rx_small.info[idx].page);
2092         }
2093         tx = &ss->tx;
2094         while (tx->done != tx->req) {
2095                 idx = tx->done & tx->mask;
2096                 skb = tx->info[idx].skb;
2097
2098                 /* Mark as free */
2099                 tx->info[idx].skb = NULL;
2100                 tx->done++;
2101                 len = pci_unmap_len(&tx->info[idx], len);
2102                 pci_unmap_len_set(&tx->info[idx], len, 0);
2103                 if (skb) {
2104                         ss->stats.tx_dropped++;
2105                         dev_kfree_skb_any(skb);
2106                         if (len)
2107                                 pci_unmap_single(mgp->pdev,
2108                                                  pci_unmap_addr(&tx->info[idx],
2109                                                                 bus), len,
2110                                                  PCI_DMA_TODEVICE);
2111                 } else {
2112                         if (len)
2113                                 pci_unmap_page(mgp->pdev,
2114                                                pci_unmap_addr(&tx->info[idx],
2115                                                               bus), len,
2116                                                PCI_DMA_TODEVICE);
2117                 }
2118         }
2119         kfree(ss->rx_big.info);
2120
2121         kfree(ss->rx_small.info);
2122
2123         kfree(ss->tx.info);
2124
2125         kfree(ss->rx_big.shadow);
2126
2127         kfree(ss->rx_small.shadow);
2128
2129         kfree(ss->tx.req_bytes);
2130         ss->tx.req_bytes = NULL;
2131         ss->tx.req_list = NULL;
2132 }
2133
2134 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2135 {
2136         struct pci_dev *pdev = mgp->pdev;
2137         struct myri10ge_slice_state *ss;
2138         struct net_device *netdev = mgp->dev;
2139         int i;
2140         int status;
2141
2142         mgp->msi_enabled = 0;
2143         mgp->msix_enabled = 0;
2144         status = 0;
2145         if (myri10ge_msi) {
2146                 if (mgp->num_slices > 1) {
2147                         status =
2148                             pci_enable_msix(pdev, mgp->msix_vectors,
2149                                             mgp->num_slices);
2150                         if (status == 0) {
2151                                 mgp->msix_enabled = 1;
2152                         } else {
2153                                 dev_err(&pdev->dev,
2154                                         "Error %d setting up MSI-X\n", status);
2155                                 return status;
2156                         }
2157                 }
2158                 if (mgp->msix_enabled == 0) {
2159                         status = pci_enable_msi(pdev);
2160                         if (status != 0) {
2161                                 dev_err(&pdev->dev,
2162                                         "Error %d setting up MSI; falling back to xPIC\n",
2163                                         status);
2164                         } else {
2165                                 mgp->msi_enabled = 1;
2166                         }
2167                 }
2168         }
2169         if (mgp->msix_enabled) {
2170                 for (i = 0; i < mgp->num_slices; i++) {
2171                         ss = &mgp->ss[i];
2172                         snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2173                                  "%s:slice-%d", netdev->name, i);
2174                         status = request_irq(mgp->msix_vectors[i].vector,
2175                                              myri10ge_intr, 0, ss->irq_desc,
2176                                              ss);
2177                         if (status != 0) {
2178                                 dev_err(&pdev->dev,
2179                                         "slice %d failed to allocate IRQ\n", i);
2180                                 i--;
2181                                 while (i >= 0) {
2182                                         free_irq(mgp->msix_vectors[i].vector,
2183                                                  &mgp->ss[i]);
2184                                         i--;
2185                                 }
2186                                 pci_disable_msix(pdev);
2187                                 return status;
2188                         }
2189                 }
2190         } else {
2191                 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2192                                      mgp->dev->name, &mgp->ss[0]);
2193                 if (status != 0) {
2194                         dev_err(&pdev->dev, "failed to allocate IRQ\n");
2195                         if (mgp->msi_enabled)
2196                                 pci_disable_msi(pdev);
2197                 }
2198         }
2199         return status;
2200 }
2201
2202 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2203 {
2204         struct pci_dev *pdev = mgp->pdev;
2205         int i;
2206
2207         if (mgp->msix_enabled) {
2208                 for (i = 0; i < mgp->num_slices; i++)
2209                         free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2210         } else {
2211                 free_irq(pdev->irq, &mgp->ss[0]);
2212         }
2213         if (mgp->msi_enabled)
2214                 pci_disable_msi(pdev);
2215         if (mgp->msix_enabled)
2216                 pci_disable_msix(pdev);
2217 }
2218
2219 static int
2220 myri10ge_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
2221                          void **ip_hdr, void **tcpudp_hdr,
2222                          u64 * hdr_flags, void *priv)
2223 {
2224         struct ethhdr *eh;
2225         struct vlan_ethhdr *veh;
2226         struct iphdr *iph;
2227         u8 *va = page_address(frag->page) + frag->page_offset;
2228         unsigned long ll_hlen;
2229         /* passed opaque through lro_receive_frags() */
2230         __wsum csum = (__force __wsum) (unsigned long)priv;
2231
2232         /* find the mac header, aborting if not IPv4 */
2233
2234         eh = (struct ethhdr *)va;
2235         *mac_hdr = eh;
2236         ll_hlen = ETH_HLEN;
2237         if (eh->h_proto != htons(ETH_P_IP)) {
2238                 if (eh->h_proto == htons(ETH_P_8021Q)) {
2239                         veh = (struct vlan_ethhdr *)va;
2240                         if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
2241                                 return -1;
2242
2243                         ll_hlen += VLAN_HLEN;
2244
2245                         /*
2246                          *  HW checksum starts ETH_HLEN bytes into
2247                          *  frame, so we must subtract off the VLAN
2248                          *  header's checksum before csum can be used
2249                          */
2250                         csum = csum_sub(csum, csum_partial(va + ETH_HLEN,
2251                                                            VLAN_HLEN, 0));
2252                 } else {
2253                         return -1;
2254                 }
2255         }
2256         *hdr_flags = LRO_IPV4;
2257
2258         iph = (struct iphdr *)(va + ll_hlen);
2259         *ip_hdr = iph;
2260         if (iph->protocol != IPPROTO_TCP)
2261                 return -1;
2262         if (iph->frag_off & htons(IP_MF | IP_OFFSET))
2263                 return -1;
2264         *hdr_flags |= LRO_TCP;
2265         *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
2266
2267         /* verify the IP checksum */
2268         if (unlikely(ip_fast_csum((u8 *) iph, iph->ihl)))
2269                 return -1;
2270
2271         /* verify the  checksum */
2272         if (unlikely(csum_tcpudp_magic(iph->saddr, iph->daddr,
2273                                        ntohs(iph->tot_len) - (iph->ihl << 2),
2274                                        IPPROTO_TCP, csum)))
2275                 return -1;
2276
2277         return 0;
2278 }
2279
2280 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2281 {
2282         struct myri10ge_cmd cmd;
2283         struct myri10ge_slice_state *ss;
2284         int status;
2285
2286         ss = &mgp->ss[slice];
2287         status = 0;
2288         if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2289                 cmd.data0 = slice;
2290                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2291                                            &cmd, 0);
2292                 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2293                     (mgp->sram + cmd.data0);
2294         }
2295         cmd.data0 = slice;
2296         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2297                                     &cmd, 0);
2298         ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2299             (mgp->sram + cmd.data0);
2300
2301         cmd.data0 = slice;
2302         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2303         ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2304             (mgp->sram + cmd.data0);
2305
2306         ss->tx.send_go = (__iomem __be32 *)
2307             (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2308         ss->tx.send_stop = (__iomem __be32 *)
2309             (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2310         return status;
2311
2312 }
2313
2314 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2315 {
2316         struct myri10ge_cmd cmd;
2317         struct myri10ge_slice_state *ss;
2318         int status;
2319
2320         ss = &mgp->ss[slice];
2321         cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2322         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2323         cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2324         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2325         if (status == -ENOSYS) {
2326                 dma_addr_t bus = ss->fw_stats_bus;
2327                 if (slice != 0)
2328                         return -EINVAL;
2329                 bus += offsetof(struct mcp_irq_data, send_done_count);
2330                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2331                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2332                 status = myri10ge_send_cmd(mgp,
2333                                            MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2334                                            &cmd, 0);
2335                 /* Firmware cannot support multicast without STATS_DMA_V2 */
2336                 mgp->fw_multicast_support = 0;
2337         } else {
2338                 mgp->fw_multicast_support = 1;
2339         }
2340         return 0;
2341 }
2342
2343 static int myri10ge_open(struct net_device *dev)
2344 {
2345         struct myri10ge_slice_state *ss;
2346         struct myri10ge_priv *mgp = netdev_priv(dev);
2347         struct myri10ge_cmd cmd;
2348         int i, status, big_pow2, slice;
2349         u8 *itable;
2350         struct net_lro_mgr *lro_mgr;
2351
2352         if (mgp->running != MYRI10GE_ETH_STOPPED)
2353                 return -EBUSY;
2354
2355         mgp->running = MYRI10GE_ETH_STARTING;
2356         status = myri10ge_reset(mgp);
2357         if (status != 0) {
2358                 printk(KERN_ERR "myri10ge: %s: failed reset\n", dev->name);
2359                 goto abort_with_nothing;
2360         }
2361
2362         if (mgp->num_slices > 1) {
2363                 cmd.data0 = mgp->num_slices;
2364                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2365                 if (mgp->dev->real_num_tx_queues > 1)
2366                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2367                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2368                                            &cmd, 0);
2369                 if (status != 0) {
2370                         printk(KERN_ERR
2371                                "myri10ge: %s: failed to set number of slices\n",
2372                                dev->name);
2373                         goto abort_with_nothing;
2374                 }
2375                 /* setup the indirection table */
2376                 cmd.data0 = mgp->num_slices;
2377                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2378                                            &cmd, 0);
2379
2380                 status |= myri10ge_send_cmd(mgp,
2381                                             MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2382                                             &cmd, 0);
2383                 if (status != 0) {
2384                         printk(KERN_ERR
2385                                "myri10ge: %s: failed to setup rss tables\n",
2386                                dev->name);
2387                         goto abort_with_nothing;
2388                 }
2389
2390                 /* just enable an identity mapping */
2391                 itable = mgp->sram + cmd.data0;
2392                 for (i = 0; i < mgp->num_slices; i++)
2393                         __raw_writeb(i, &itable[i]);
2394
2395                 cmd.data0 = 1;
2396                 cmd.data1 = myri10ge_rss_hash;
2397                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2398                                            &cmd, 0);
2399                 if (status != 0) {
2400                         printk(KERN_ERR
2401                                "myri10ge: %s: failed to enable slices\n",
2402                                dev->name);
2403                         goto abort_with_nothing;
2404                 }
2405         }
2406
2407         status = myri10ge_request_irq(mgp);
2408         if (status != 0)
2409                 goto abort_with_nothing;
2410
2411         /* decide what small buffer size to use.  For good TCP rx
2412          * performance, it is important to not receive 1514 byte
2413          * frames into jumbo buffers, as it confuses the socket buffer
2414          * accounting code, leading to drops and erratic performance.
2415          */
2416
2417         if (dev->mtu <= ETH_DATA_LEN)
2418                 /* enough for a TCP header */
2419                 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2420                     ? (128 - MXGEFW_PAD)
2421                     : (SMP_CACHE_BYTES - MXGEFW_PAD);
2422         else
2423                 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2424                 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2425
2426         /* Override the small buffer size? */
2427         if (myri10ge_small_bytes > 0)
2428                 mgp->small_bytes = myri10ge_small_bytes;
2429
2430         /* Firmware needs the big buff size as a power of 2.  Lie and
2431          * tell him the buffer is larger, because we only use 1
2432          * buffer/pkt, and the mtu will prevent overruns.
2433          */
2434         big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2435         if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2436                 while (!is_power_of_2(big_pow2))
2437                         big_pow2++;
2438                 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2439         } else {
2440                 big_pow2 = MYRI10GE_ALLOC_SIZE;
2441                 mgp->big_bytes = big_pow2;
2442         }
2443
2444         /* setup the per-slice data structures */
2445         for (slice = 0; slice < mgp->num_slices; slice++) {
2446                 ss = &mgp->ss[slice];
2447
2448                 status = myri10ge_get_txrx(mgp, slice);
2449                 if (status != 0) {
2450                         printk(KERN_ERR
2451                                "myri10ge: %s: failed to get ring sizes or locations\n",
2452                                dev->name);
2453                         goto abort_with_rings;
2454                 }
2455                 status = myri10ge_allocate_rings(ss);
2456                 if (status != 0)
2457                         goto abort_with_rings;
2458
2459                 /* only firmware which supports multiple TX queues
2460                  * supports setting up the tx stats on non-zero
2461                  * slices */
2462                 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2463                         status = myri10ge_set_stats(mgp, slice);
2464                 if (status) {
2465                         printk(KERN_ERR
2466                                "myri10ge: %s: Couldn't set stats DMA\n",
2467                                dev->name);
2468                         goto abort_with_rings;
2469                 }
2470
2471                 lro_mgr = &ss->rx_done.lro_mgr;
2472                 lro_mgr->dev = dev;
2473                 lro_mgr->features = LRO_F_NAPI;
2474                 lro_mgr->ip_summed = CHECKSUM_COMPLETE;
2475                 lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
2476                 lro_mgr->max_desc = MYRI10GE_MAX_LRO_DESCRIPTORS;
2477                 lro_mgr->lro_arr = ss->rx_done.lro_desc;
2478                 lro_mgr->get_frag_header = myri10ge_get_frag_header;
2479                 lro_mgr->max_aggr = myri10ge_lro_max_pkts;
2480                 lro_mgr->frag_align_pad = 2;
2481                 if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
2482                         lro_mgr->max_aggr = MAX_SKB_FRAGS;
2483
2484                 /* must happen prior to any irq */
2485                 napi_enable(&(ss)->napi);
2486         }
2487
2488         /* now give firmware buffers sizes, and MTU */
2489         cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2490         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2491         cmd.data0 = mgp->small_bytes;
2492         status |=
2493             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2494         cmd.data0 = big_pow2;
2495         status |=
2496             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2497         if (status) {
2498                 printk(KERN_ERR "myri10ge: %s: Couldn't set buffer sizes\n",
2499                        dev->name);
2500                 goto abort_with_rings;
2501         }
2502
2503         /*
2504          * Set Linux style TSO mode; this is needed only on newer
2505          *  firmware versions.  Older versions default to Linux
2506          *  style TSO
2507          */
2508         cmd.data0 = 0;
2509         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2510         if (status && status != -ENOSYS) {
2511                 printk(KERN_ERR "myri10ge: %s: Couldn't set TSO mode\n",
2512                        dev->name);
2513                 goto abort_with_rings;
2514         }
2515
2516         mgp->link_state = ~0U;
2517         mgp->rdma_tags_available = 15;
2518
2519         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2520         if (status) {
2521                 printk(KERN_ERR "myri10ge: %s: Couldn't bring up link\n",
2522                        dev->name);
2523                 goto abort_with_rings;
2524         }
2525
2526         mgp->running = MYRI10GE_ETH_RUNNING;
2527         mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2528         add_timer(&mgp->watchdog_timer);
2529         netif_tx_wake_all_queues(dev);
2530
2531         return 0;
2532
2533 abort_with_rings:
2534         while (slice) {
2535                 slice--;
2536                 napi_disable(&mgp->ss[slice].napi);
2537         }
2538         for (i = 0; i < mgp->num_slices; i++)
2539                 myri10ge_free_rings(&mgp->ss[i]);
2540
2541         myri10ge_free_irq(mgp);
2542
2543 abort_with_nothing:
2544         mgp->running = MYRI10GE_ETH_STOPPED;
2545         return -ENOMEM;
2546 }
2547
2548 static int myri10ge_close(struct net_device *dev)
2549 {
2550         struct myri10ge_priv *mgp = netdev_priv(dev);
2551         struct myri10ge_cmd cmd;
2552         int status, old_down_cnt;
2553         int i;
2554
2555         if (mgp->running != MYRI10GE_ETH_RUNNING)
2556                 return 0;
2557
2558         if (mgp->ss[0].tx.req_bytes == NULL)
2559                 return 0;
2560
2561         del_timer_sync(&mgp->watchdog_timer);
2562         mgp->running = MYRI10GE_ETH_STOPPING;
2563         for (i = 0; i < mgp->num_slices; i++) {
2564                 napi_disable(&mgp->ss[i].napi);
2565         }
2566         netif_carrier_off(dev);
2567
2568         netif_tx_stop_all_queues(dev);
2569         if (mgp->rebooted == 0) {
2570                 old_down_cnt = mgp->down_cnt;
2571                 mb();
2572                 status =
2573                     myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2574                 if (status)
2575                         printk(KERN_ERR
2576                                "myri10ge: %s: Couldn't bring down link\n",
2577                                dev->name);
2578
2579                 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt,
2580                                    HZ);
2581                 if (old_down_cnt == mgp->down_cnt)
2582                         printk(KERN_ERR "myri10ge: %s never got down irq\n",
2583                                dev->name);
2584         }
2585         netif_tx_disable(dev);
2586         myri10ge_free_irq(mgp);
2587         for (i = 0; i < mgp->num_slices; i++)
2588                 myri10ge_free_rings(&mgp->ss[i]);
2589
2590         mgp->running = MYRI10GE_ETH_STOPPED;
2591         return 0;
2592 }
2593
2594 /* copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2595  * backwards one at a time and handle ring wraps */
2596
2597 static inline void
2598 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2599                               struct mcp_kreq_ether_send *src, int cnt)
2600 {
2601         int idx, starting_slot;
2602         starting_slot = tx->req;
2603         while (cnt > 1) {
2604                 cnt--;
2605                 idx = (starting_slot + cnt) & tx->mask;
2606                 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2607                 mb();
2608         }
2609 }
2610
2611 /*
2612  * copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2613  * at most 32 bytes at a time, so as to avoid involving the software
2614  * pio handler in the nic.   We re-write the first segment's flags
2615  * to mark them valid only after writing the entire chain.
2616  */
2617
2618 static inline void
2619 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2620                     int cnt)
2621 {
2622         int idx, i;
2623         struct mcp_kreq_ether_send __iomem *dstp, *dst;
2624         struct mcp_kreq_ether_send *srcp;
2625         u8 last_flags;
2626
2627         idx = tx->req & tx->mask;
2628
2629         last_flags = src->flags;
2630         src->flags = 0;
2631         mb();
2632         dst = dstp = &tx->lanai[idx];
2633         srcp = src;
2634
2635         if ((idx + cnt) < tx->mask) {
2636                 for (i = 0; i < (cnt - 1); i += 2) {
2637                         myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2638                         mb();   /* force write every 32 bytes */
2639                         srcp += 2;
2640                         dstp += 2;
2641                 }
2642         } else {
2643                 /* submit all but the first request, and ensure
2644                  * that it is submitted below */
2645                 myri10ge_submit_req_backwards(tx, src, cnt);
2646                 i = 0;
2647         }
2648         if (i < cnt) {
2649                 /* submit the first request */
2650                 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2651                 mb();           /* barrier before setting valid flag */
2652         }
2653
2654         /* re-write the last 32-bits with the valid flags */
2655         src->flags = last_flags;
2656         put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2657         tx->req += cnt;
2658         mb();
2659 }
2660
2661 /*
2662  * Transmit a packet.  We need to split the packet so that a single
2663  * segment does not cross myri10ge->tx_boundary, so this makes segment
2664  * counting tricky.  So rather than try to count segments up front, we
2665  * just give up if there are too few segments to hold a reasonably
2666  * fragmented packet currently available.  If we run
2667  * out of segments while preparing a packet for DMA, we just linearize
2668  * it and try again.
2669  */
2670
2671 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
2672                                        struct net_device *dev)
2673 {
2674         struct myri10ge_priv *mgp = netdev_priv(dev);
2675         struct myri10ge_slice_state *ss;
2676         struct mcp_kreq_ether_send *req;
2677         struct myri10ge_tx_buf *tx;
2678         struct skb_frag_struct *frag;
2679         struct netdev_queue *netdev_queue;
2680         dma_addr_t bus;
2681         u32 low;
2682         __be32 high_swapped;
2683         unsigned int len;
2684         int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2685         u16 pseudo_hdr_offset, cksum_offset, queue;
2686         int cum_len, seglen, boundary, rdma_count;
2687         u8 flags, odd_flag;
2688
2689         queue = skb_get_queue_mapping(skb);
2690         ss = &mgp->ss[queue];
2691         netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2692         tx = &ss->tx;
2693
2694 again:
2695         req = tx->req_list;
2696         avail = tx->mask - 1 - (tx->req - tx->done);
2697
2698         mss = 0;
2699         max_segments = MXGEFW_MAX_SEND_DESC;
2700
2701         if (skb_is_gso(skb)) {
2702                 mss = skb_shinfo(skb)->gso_size;
2703                 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2704         }
2705
2706         if ((unlikely(avail < max_segments))) {
2707                 /* we are out of transmit resources */
2708                 tx->stop_queue++;
2709                 netif_tx_stop_queue(netdev_queue);
2710                 return NETDEV_TX_BUSY;
2711         }
2712
2713         /* Setup checksum offloading, if needed */
2714         cksum_offset = 0;
2715         pseudo_hdr_offset = 0;
2716         odd_flag = 0;
2717         flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2718         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2719                 cksum_offset = skb_transport_offset(skb);
2720                 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2721                 /* If the headers are excessively large, then we must
2722                  * fall back to a software checksum */
2723                 if (unlikely(!mss && (cksum_offset > 255 ||
2724                                       pseudo_hdr_offset > 127))) {
2725                         if (skb_checksum_help(skb))
2726                                 goto drop;
2727                         cksum_offset = 0;
2728                         pseudo_hdr_offset = 0;
2729                 } else {
2730                         odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2731                         flags |= MXGEFW_FLAGS_CKSUM;
2732                 }
2733         }
2734
2735         cum_len = 0;
2736
2737         if (mss) {              /* TSO */
2738                 /* this removes any CKSUM flag from before */
2739                 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2740
2741                 /* negative cum_len signifies to the
2742                  * send loop that we are still in the
2743                  * header portion of the TSO packet.
2744                  * TSO header can be at most 1KB long */
2745                 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2746
2747                 /* for IPv6 TSO, the checksum offset stores the
2748                  * TCP header length, to save the firmware from
2749                  * the need to parse the headers */
2750                 if (skb_is_gso_v6(skb)) {
2751                         cksum_offset = tcp_hdrlen(skb);
2752                         /* Can only handle headers <= max_tso6 long */
2753                         if (unlikely(-cum_len > mgp->max_tso6))
2754                                 return myri10ge_sw_tso(skb, dev);
2755                 }
2756                 /* for TSO, pseudo_hdr_offset holds mss.
2757                  * The firmware figures out where to put
2758                  * the checksum by parsing the header. */
2759                 pseudo_hdr_offset = mss;
2760         } else
2761                 /* Mark small packets, and pad out tiny packets */
2762         if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2763                 flags |= MXGEFW_FLAGS_SMALL;
2764
2765                 /* pad frames to at least ETH_ZLEN bytes */
2766                 if (unlikely(skb->len < ETH_ZLEN)) {
2767                         if (skb_padto(skb, ETH_ZLEN)) {
2768                                 /* The packet is gone, so we must
2769                                  * return 0 */
2770                                 ss->stats.tx_dropped += 1;
2771                                 return NETDEV_TX_OK;
2772                         }
2773                         /* adjust the len to account for the zero pad
2774                          * so that the nic can know how long it is */
2775                         skb->len = ETH_ZLEN;
2776                 }
2777         }
2778
2779         /* map the skb for DMA */
2780         len = skb->len - skb->data_len;
2781         idx = tx->req & tx->mask;
2782         tx->info[idx].skb = skb;
2783         bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2784         pci_unmap_addr_set(&tx->info[idx], bus, bus);
2785         pci_unmap_len_set(&tx->info[idx], len, len);
2786
2787         frag_cnt = skb_shinfo(skb)->nr_frags;
2788         frag_idx = 0;
2789         count = 0;
2790         rdma_count = 0;
2791
2792         /* "rdma_count" is the number of RDMAs belonging to the
2793          * current packet BEFORE the current send request. For
2794          * non-TSO packets, this is equal to "count".
2795          * For TSO packets, rdma_count needs to be reset
2796          * to 0 after a segment cut.
2797          *
2798          * The rdma_count field of the send request is
2799          * the number of RDMAs of the packet starting at
2800          * that request. For TSO send requests with one ore more cuts
2801          * in the middle, this is the number of RDMAs starting
2802          * after the last cut in the request. All previous
2803          * segments before the last cut implicitly have 1 RDMA.
2804          *
2805          * Since the number of RDMAs is not known beforehand,
2806          * it must be filled-in retroactively - after each
2807          * segmentation cut or at the end of the entire packet.
2808          */
2809
2810         while (1) {
2811                 /* Break the SKB or Fragment up into pieces which
2812                  * do not cross mgp->tx_boundary */
2813                 low = MYRI10GE_LOWPART_TO_U32(bus);
2814                 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2815                 while (len) {
2816                         u8 flags_next;
2817                         int cum_len_next;
2818
2819                         if (unlikely(count == max_segments))
2820                                 goto abort_linearize;
2821
2822                         boundary =
2823                             (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2824                         seglen = boundary - low;
2825                         if (seglen > len)
2826                                 seglen = len;
2827                         flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2828                         cum_len_next = cum_len + seglen;
2829                         if (mss) {      /* TSO */
2830                                 (req - rdma_count)->rdma_count = rdma_count + 1;
2831
2832                                 if (likely(cum_len >= 0)) {     /* payload */
2833                                         int next_is_first, chop;
2834
2835                                         chop = (cum_len_next > mss);
2836                                         cum_len_next = cum_len_next % mss;
2837                                         next_is_first = (cum_len_next == 0);
2838                                         flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2839                                         flags_next |= next_is_first *
2840                                             MXGEFW_FLAGS_FIRST;
2841                                         rdma_count |= -(chop | next_is_first);
2842                                         rdma_count += chop & !next_is_first;
2843                                 } else if (likely(cum_len_next >= 0)) { /* header ends */
2844                                         int small;
2845
2846                                         rdma_count = -1;
2847                                         cum_len_next = 0;
2848                                         seglen = -cum_len;
2849                                         small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2850                                         flags_next = MXGEFW_FLAGS_TSO_PLD |
2851                                             MXGEFW_FLAGS_FIRST |
2852                                             (small * MXGEFW_FLAGS_SMALL);
2853                                 }
2854                         }
2855                         req->addr_high = high_swapped;
2856                         req->addr_low = htonl(low);
2857                         req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2858                         req->pad = 0;   /* complete solid 16-byte block; does this matter? */
2859                         req->rdma_count = 1;
2860                         req->length = htons(seglen);
2861                         req->cksum_offset = cksum_offset;
2862                         req->flags = flags | ((cum_len & 1) * odd_flag);
2863
2864                         low += seglen;
2865                         len -= seglen;
2866                         cum_len = cum_len_next;
2867                         flags = flags_next;
2868                         req++;
2869                         count++;
2870                         rdma_count++;
2871                         if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2872                                 if (unlikely(cksum_offset > seglen))
2873                                         cksum_offset -= seglen;
2874                                 else
2875                                         cksum_offset = 0;
2876                         }
2877                 }
2878                 if (frag_idx == frag_cnt)
2879                         break;
2880
2881                 /* map next fragment for DMA */
2882                 idx = (count + tx->req) & tx->mask;
2883                 frag = &skb_shinfo(skb)->frags[frag_idx];
2884                 frag_idx++;
2885                 len = frag->size;
2886                 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2887                                    len, PCI_DMA_TODEVICE);
2888                 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2889                 pci_unmap_len_set(&tx->info[idx], len, len);
2890         }
2891
2892         (req - rdma_count)->rdma_count = rdma_count;
2893         if (mss)
2894                 do {
2895                         req--;
2896                         req->flags |= MXGEFW_FLAGS_TSO_LAST;
2897                 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2898                                          MXGEFW_FLAGS_FIRST)));
2899         idx = ((count - 1) + tx->req) & tx->mask;
2900         tx->info[idx].last = 1;
2901         myri10ge_submit_req(tx, tx->req_list, count);
2902         /* if using multiple tx queues, make sure NIC polls the
2903          * current slice */
2904         if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
2905                 tx->queue_active = 1;
2906                 put_be32(htonl(1), tx->send_go);
2907                 mb();
2908                 mmiowb();
2909         }
2910         tx->pkt_start++;
2911         if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2912                 tx->stop_queue++;
2913                 netif_tx_stop_queue(netdev_queue);
2914         }
2915         return NETDEV_TX_OK;
2916
2917 abort_linearize:
2918         /* Free any DMA resources we've alloced and clear out the skb
2919          * slot so as to not trip up assertions, and to avoid a
2920          * double-free if linearizing fails */
2921
2922         last_idx = (idx + 1) & tx->mask;
2923         idx = tx->req & tx->mask;
2924         tx->info[idx].skb = NULL;
2925         do {
2926                 len = pci_unmap_len(&tx->info[idx], len);
2927                 if (len) {
2928                         if (tx->info[idx].skb != NULL)
2929                                 pci_unmap_single(mgp->pdev,
2930                                                  pci_unmap_addr(&tx->info[idx],
2931                                                                 bus), len,
2932                                                  PCI_DMA_TODEVICE);
2933                         else
2934                                 pci_unmap_page(mgp->pdev,
2935                                                pci_unmap_addr(&tx->info[idx],
2936                                                               bus), len,
2937                                                PCI_DMA_TODEVICE);
2938                         pci_unmap_len_set(&tx->info[idx], len, 0);
2939                         tx->info[idx].skb = NULL;
2940                 }
2941                 idx = (idx + 1) & tx->mask;
2942         } while (idx != last_idx);
2943         if (skb_is_gso(skb)) {
2944                 printk(KERN_ERR
2945                        "myri10ge: %s: TSO but wanted to linearize?!?!?\n",
2946                        mgp->dev->name);
2947                 goto drop;
2948         }
2949
2950         if (skb_linearize(skb))
2951                 goto drop;
2952
2953         tx->linearized++;
2954         goto again;
2955
2956 drop:
2957         dev_kfree_skb_any(skb);
2958         ss->stats.tx_dropped += 1;
2959         return NETDEV_TX_OK;
2960
2961 }
2962
2963 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
2964                                          struct net_device *dev)
2965 {
2966         struct sk_buff *segs, *curr;
2967         struct myri10ge_priv *mgp = netdev_priv(dev);
2968         struct myri10ge_slice_state *ss;
2969         netdev_tx_t status;
2970
2971         segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2972         if (IS_ERR(segs))
2973                 goto drop;
2974
2975         while (segs) {
2976                 curr = segs;
2977                 segs = segs->next;
2978                 curr->next = NULL;
2979                 status = myri10ge_xmit(curr, dev);
2980                 if (status != 0) {
2981                         dev_kfree_skb_any(curr);
2982                         if (segs != NULL) {
2983                                 curr = segs;
2984                                 segs = segs->next;
2985                                 curr->next = NULL;
2986                                 dev_kfree_skb_any(segs);
2987                         }
2988                         goto drop;
2989                 }
2990         }
2991         dev_kfree_skb_any(skb);
2992         return NETDEV_TX_OK;
2993
2994 drop:
2995         ss = &mgp->ss[skb_get_queue_mapping(skb)];
2996         dev_kfree_skb_any(skb);
2997         ss->stats.tx_dropped += 1;
2998         return NETDEV_TX_OK;
2999 }
3000
3001 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
3002 {
3003         struct myri10ge_priv *mgp = netdev_priv(dev);
3004         struct myri10ge_slice_netstats *slice_stats;
3005         struct net_device_stats *stats = &mgp->stats;
3006         int i;
3007
3008         spin_lock(&mgp->stats_lock);
3009         memset(stats, 0, sizeof(*stats));
3010         for (i = 0; i < mgp->num_slices; i++) {
3011                 slice_stats = &mgp->ss[i].stats;
3012                 stats->rx_packets += slice_stats->rx_packets;
3013                 stats->tx_packets += slice_stats->tx_packets;
3014                 stats->rx_bytes += slice_stats->rx_bytes;
3015                 stats->tx_bytes += slice_stats->tx_bytes;
3016                 stats->rx_dropped += slice_stats->rx_dropped;
3017                 stats->tx_dropped += slice_stats->tx_dropped;
3018         }
3019         spin_unlock(&mgp->stats_lock);
3020         return stats;
3021 }
3022
3023 static void myri10ge_set_multicast_list(struct net_device *dev)
3024 {
3025         struct myri10ge_priv *mgp = netdev_priv(dev);
3026         struct myri10ge_cmd cmd;
3027         struct dev_mc_list *mc_list;
3028         __be32 data[2] = { 0, 0 };
3029         int err;
3030
3031         /* can be called from atomic contexts,
3032          * pass 1 to force atomicity in myri10ge_send_cmd() */
3033         myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
3034
3035         /* This firmware is known to not support multicast */
3036         if (!mgp->fw_multicast_support)
3037                 return;
3038
3039         /* Disable multicast filtering */
3040
3041         err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
3042         if (err != 0) {
3043                 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_ENABLE_ALLMULTI,"
3044                        " error status: %d\n", dev->name, err);
3045                 goto abort;
3046         }
3047
3048         if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
3049                 /* request to disable multicast filtering, so quit here */
3050                 return;
3051         }
3052
3053         /* Flush the filters */
3054
3055         err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
3056                                 &cmd, 1);
3057         if (err != 0) {
3058                 printk(KERN_ERR
3059                        "myri10ge: %s: Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS"
3060                        ", error status: %d\n", dev->name, err);
3061                 goto abort;
3062         }
3063
3064         /* Walk the multicast list, and add each address */
3065         for (mc_list = dev->mc_list; mc_list != NULL; mc_list = mc_list->next) {
3066                 memcpy(data, &mc_list->dmi_addr, 6);
3067                 cmd.data0 = ntohl(data[0]);
3068                 cmd.data1 = ntohl(data[1]);
3069                 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
3070                                         &cmd, 1);
3071
3072                 if (err != 0) {
3073                         printk(KERN_ERR "myri10ge: %s: Failed "
3074                                "MXGEFW_JOIN_MULTICAST_GROUP, error status:"
3075                                "%d\t", dev->name, err);
3076                         printk(KERN_ERR "MAC %pM\n", mc_list->dmi_addr);
3077                         goto abort;
3078                 }
3079         }
3080         /* Enable multicast filtering */
3081         err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
3082         if (err != 0) {
3083                 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_DISABLE_ALLMULTI,"
3084                        "error status: %d\n", dev->name, err);
3085                 goto abort;
3086         }
3087
3088         return;
3089
3090 abort:
3091         return;
3092 }
3093
3094 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3095 {
3096         struct sockaddr *sa = addr;
3097         struct myri10ge_priv *mgp = netdev_priv(dev);
3098         int status;
3099
3100         if (!is_valid_ether_addr(sa->sa_data))
3101                 return -EADDRNOTAVAIL;
3102
3103         status = myri10ge_update_mac_address(mgp, sa->sa_data);
3104         if (status != 0) {
3105                 printk(KERN_ERR
3106                        "myri10ge: %s: changing mac address failed with %d\n",
3107                        dev->name, status);
3108                 return status;
3109         }
3110
3111         /* change the dev structure */
3112         memcpy(dev->dev_addr, sa->sa_data, 6);
3113         return 0;
3114 }
3115
3116 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3117 {
3118         struct myri10ge_priv *mgp = netdev_priv(dev);
3119         int error = 0;
3120
3121         if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
3122                 printk(KERN_ERR "myri10ge: %s: new mtu (%d) is not valid\n",
3123                        dev->name, new_mtu);
3124                 return -EINVAL;
3125         }
3126         printk(KERN_INFO "%s: changing mtu from %d to %d\n",
3127                dev->name, dev->mtu, new_mtu);
3128         if (mgp->running) {
3129                 /* if we change the mtu on an active device, we must
3130                  * reset the device so the firmware sees the change */
3131                 myri10ge_close(dev);
3132                 dev->mtu = new_mtu;
3133                 myri10ge_open(dev);
3134         } else
3135                 dev->mtu = new_mtu;
3136
3137         return error;
3138 }
3139
3140 /*
3141  * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3142  * Only do it if the bridge is a root port since we don't want to disturb
3143  * any other device, except if forced with myri10ge_ecrc_enable > 1.
3144  */
3145
3146 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3147 {
3148         struct pci_dev *bridge = mgp->pdev->bus->self;
3149         struct device *dev = &mgp->pdev->dev;
3150         unsigned cap;
3151         unsigned err_cap;
3152         u16 val;
3153         u8 ext_type;
3154         int ret;
3155
3156         if (!myri10ge_ecrc_enable || !bridge)
3157                 return;
3158
3159         /* check that the bridge is a root port */
3160         cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
3161         pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
3162         ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3163         if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
3164                 if (myri10ge_ecrc_enable > 1) {
3165                         struct pci_dev *prev_bridge, *old_bridge = bridge;
3166
3167                         /* Walk the hierarchy up to the root port
3168                          * where ECRC has to be enabled */
3169                         do {
3170                                 prev_bridge = bridge;
3171                                 bridge = bridge->bus->self;
3172                                 if (!bridge || prev_bridge == bridge) {
3173                                         dev_err(dev,
3174                                                 "Failed to find root port"
3175                                                 " to force ECRC\n");
3176                                         return;
3177                                 }
3178                                 cap =
3179                                     pci_find_capability(bridge, PCI_CAP_ID_EXP);
3180                                 pci_read_config_word(bridge,
3181                                                      cap + PCI_CAP_FLAGS, &val);
3182                                 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3183                         } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
3184
3185                         dev_info(dev,
3186                                  "Forcing ECRC on non-root port %s"
3187                                  " (enabling on root port %s)\n",
3188                                  pci_name(old_bridge), pci_name(bridge));
3189                 } else {
3190                         dev_err(dev,
3191                                 "Not enabling ECRC on non-root port %s\n",
3192                                 pci_name(bridge));
3193                         return;
3194                 }
3195         }
3196
3197         cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3198         if (!cap)
3199                 return;
3200
3201         ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3202         if (ret) {
3203                 dev_err(dev, "failed reading ext-conf-space of %s\n",
3204                         pci_name(bridge));
3205                 dev_err(dev, "\t pci=nommconf in use? "
3206                         "or buggy/incomplete/absent ACPI MCFG attr?\n");
3207                 return;
3208         }
3209         if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3210                 return;
3211
3212         err_cap |= PCI_ERR_CAP_ECRC_GENE;
3213         pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3214         dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3215 }
3216
3217 /*
3218  * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3219  * when the PCI-E Completion packets are aligned on an 8-byte
3220  * boundary.  Some PCI-E chip sets always align Completion packets; on
3221  * the ones that do not, the alignment can be enforced by enabling
3222  * ECRC generation (if supported).
3223  *
3224  * When PCI-E Completion packets are not aligned, it is actually more
3225  * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3226  *
3227  * If the driver can neither enable ECRC nor verify that it has
3228  * already been enabled, then it must use a firmware image which works
3229  * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3230  * should also ensure that it never gives the device a Read-DMA which is
3231  * larger than 2KB by setting the tx_boundary to 2KB.  If ECRC is
3232  * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3233  * firmware image, and set tx_boundary to 4KB.
3234  */
3235
3236 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3237 {
3238         struct pci_dev *pdev = mgp->pdev;
3239         struct device *dev = &pdev->dev;
3240         int status;
3241
3242         mgp->tx_boundary = 4096;
3243         /*
3244          * Verify the max read request size was set to 4KB
3245          * before trying the test with 4KB.
3246          */
3247         status = pcie_get_readrq(pdev);
3248         if (status < 0) {
3249                 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3250                 goto abort;
3251         }
3252         if (status != 4096) {
3253                 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3254                 mgp->tx_boundary = 2048;
3255         }
3256         /*
3257          * load the optimized firmware (which assumes aligned PCIe
3258          * completions) in order to see if it works on this host.
3259          */
3260         mgp->fw_name = myri10ge_fw_aligned;
3261         status = myri10ge_load_firmware(mgp, 1);
3262         if (status != 0) {
3263                 goto abort;
3264         }
3265
3266         /*
3267          * Enable ECRC if possible
3268          */
3269         myri10ge_enable_ecrc(mgp);
3270
3271         /*
3272          * Run a DMA test which watches for unaligned completions and
3273          * aborts on the first one seen.
3274          */
3275
3276         status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3277         if (status == 0)
3278                 return;         /* keep the aligned firmware */
3279
3280         if (status != -E2BIG)
3281                 dev_warn(dev, "DMA test failed: %d\n", status);
3282         if (status == -ENOSYS)
3283                 dev_warn(dev, "Falling back to ethp! "
3284                          "Please install up to date fw\n");
3285 abort:
3286         /* fall back to using the unaligned firmware */
3287         mgp->tx_boundary = 2048;
3288         mgp->fw_name = myri10ge_fw_unaligned;
3289
3290 }
3291
3292 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3293 {
3294         int overridden = 0;
3295
3296         if (myri10ge_force_firmware == 0) {
3297                 int link_width, exp_cap;
3298                 u16 lnk;
3299
3300                 exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
3301                 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
3302                 link_width = (lnk >> 4) & 0x3f;
3303
3304                 /* Check to see if Link is less than 8 or if the
3305                  * upstream bridge is known to provide aligned
3306                  * completions */
3307                 if (link_width < 8) {
3308                         dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3309                                  link_width);
3310                         mgp->tx_boundary = 4096;
3311                         mgp->fw_name = myri10ge_fw_aligned;
3312                 } else {
3313                         myri10ge_firmware_probe(mgp);
3314                 }
3315         } else {
3316                 if (myri10ge_force_firmware == 1) {
3317                         dev_info(&mgp->pdev->dev,
3318                                  "Assuming aligned completions (forced)\n");
3319                         mgp->tx_boundary = 4096;
3320                         mgp->fw_name = myri10ge_fw_aligned;
3321                 } else {
3322                         dev_info(&mgp->pdev->dev,
3323                                  "Assuming unaligned completions (forced)\n");
3324                         mgp->tx_boundary = 2048;
3325                         mgp->fw_name = myri10ge_fw_unaligned;
3326                 }
3327         }
3328         if (myri10ge_fw_name != NULL) {
3329                 overridden = 1;
3330                 mgp->fw_name = myri10ge_fw_name;
3331         }
3332         if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
3333             myri10ge_fw_names[mgp->board_number] != NULL &&
3334             strlen(myri10ge_fw_names[mgp->board_number])) {
3335                 mgp->fw_name = myri10ge_fw_names[mgp->board_number];
3336                 overridden = 1;
3337         }
3338         if (overridden)
3339                 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3340                          mgp->fw_name);
3341 }
3342
3343 #ifdef CONFIG_PM
3344 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3345 {
3346         struct myri10ge_priv *mgp;
3347         struct net_device *netdev;
3348
3349         mgp = pci_get_drvdata(pdev);
3350         if (mgp == NULL)
3351                 return -EINVAL;
3352         netdev = mgp->dev;
3353
3354         netif_device_detach(netdev);
3355         if (netif_running(netdev)) {
3356                 printk(KERN_INFO "myri10ge: closing %s\n", netdev->name);
3357                 rtnl_lock();
3358                 myri10ge_close(netdev);
3359                 rtnl_unlock();
3360         }
3361         myri10ge_dummy_rdma(mgp, 0);
3362         pci_save_state(pdev);
3363         pci_disable_device(pdev);
3364
3365         return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3366 }
3367
3368 static int myri10ge_resume(struct pci_dev *pdev)
3369 {
3370         struct myri10ge_priv *mgp;
3371         struct net_device *netdev;
3372         int status;
3373         u16 vendor;
3374
3375         mgp = pci_get_drvdata(pdev);
3376         if (mgp == NULL)
3377                 return -EINVAL;
3378         netdev = mgp->dev;
3379         pci_set_power_state(pdev, 0);   /* zeros conf space as a side effect */
3380         msleep(5);              /* give card time to respond */
3381         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3382         if (vendor == 0xffff) {
3383                 printk(KERN_ERR "myri10ge: %s: device disappeared!\n",
3384                        mgp->dev->name);
3385                 return -EIO;
3386         }
3387
3388         status = pci_restore_state(pdev);
3389         if (status)
3390                 return status;
3391
3392         status = pci_enable_device(pdev);
3393         if (status) {
3394                 dev_err(&pdev->dev, "failed to enable device\n");
3395                 return status;
3396         }
3397
3398         pci_set_master(pdev);
3399
3400         myri10ge_reset(mgp);
3401         myri10ge_dummy_rdma(mgp, 1);
3402
3403         /* Save configuration space to be restored if the
3404          * nic resets due to a parity error */
3405         pci_save_state(pdev);
3406
3407         if (netif_running(netdev)) {
3408                 rtnl_lock();
3409                 status = myri10ge_open(netdev);
3410                 rtnl_unlock();
3411                 if (status != 0)
3412                         goto abort_with_enabled;
3413
3414         }
3415         netif_device_attach(netdev);
3416
3417         return 0;
3418
3419 abort_with_enabled:
3420         pci_disable_device(pdev);
3421         return -EIO;
3422
3423 }
3424 #endif                          /* CONFIG_PM */
3425
3426 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3427 {
3428         struct pci_dev *pdev = mgp->pdev;
3429         int vs = mgp->vendor_specific_offset;
3430         u32 reboot;
3431
3432         /*enter read32 mode */
3433         pci_write_config_byte(pdev, vs + 0x10, 0x3);
3434
3435         /*read REBOOT_STATUS (0xfffffff0) */
3436         pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3437         pci_read_config_dword(pdev, vs + 0x14, &reboot);
3438         return reboot;
3439 }
3440
3441 /*
3442  * This watchdog is used to check whether the board has suffered
3443  * from a parity error and needs to be recovered.
3444  */
3445 static void myri10ge_watchdog(struct work_struct *work)
3446 {
3447         struct myri10ge_priv *mgp =
3448             container_of(work, struct myri10ge_priv, watchdog_work);
3449         struct myri10ge_tx_buf *tx;
3450         u32 reboot;
3451         int status, rebooted;
3452         int i;
3453         u16 cmd, vendor;
3454
3455         mgp->watchdog_resets++;
3456         pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3457         rebooted = 0;
3458         if ((cmd & PCI_COMMAND_MASTER) == 0) {
3459                 /* Bus master DMA disabled?  Check to see
3460                  * if the card rebooted due to a parity error
3461                  * For now, just report it */
3462                 reboot = myri10ge_read_reboot(mgp);
3463                 printk(KERN_ERR
3464                        "myri10ge: %s: NIC rebooted (0x%x),%s resetting\n",
3465                        mgp->dev->name, reboot,
3466                        myri10ge_reset_recover ? " " : " not");
3467                 if (myri10ge_reset_recover == 0)
3468                         return;
3469                 rtnl_lock();
3470                 mgp->rebooted = 1;
3471                 rebooted = 1;
3472                 myri10ge_close(mgp->dev);
3473                 myri10ge_reset_recover--;
3474                 mgp->rebooted = 0;
3475                 /*
3476                  * A rebooted nic will come back with config space as
3477                  * it was after power was applied to PCIe bus.
3478                  * Attempt to restore config space which was saved
3479                  * when the driver was loaded, or the last time the
3480                  * nic was resumed from power saving mode.
3481                  */
3482                 pci_restore_state(mgp->pdev);
3483
3484                 /* save state again for accounting reasons */
3485                 pci_save_state(mgp->pdev);
3486
3487         } else {
3488                 /* if we get back -1's from our slot, perhaps somebody
3489                  * powered off our card.  Don't try to reset it in
3490                  * this case */
3491                 if (cmd == 0xffff) {
3492                         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3493                         if (vendor == 0xffff) {
3494                                 printk(KERN_ERR
3495                                        "myri10ge: %s: device disappeared!\n",
3496                                        mgp->dev->name);
3497                                 return;
3498                         }
3499                 }
3500                 /* Perhaps it is a software error.  Try to reset */
3501
3502                 printk(KERN_ERR "myri10ge: %s: device timeout, resetting\n",
3503                        mgp->dev->name);
3504                 for (i = 0; i < mgp->num_slices; i++) {
3505                         tx = &mgp->ss[i].tx;
3506                         printk(KERN_INFO
3507                                "myri10ge: %s: (%d): %d %d %d %d %d %d\n",
3508                                mgp->dev->name, i, tx->queue_active, tx->req,
3509                                tx->done, tx->pkt_start, tx->pkt_done,
3510                                (int)ntohl(mgp->ss[i].fw_stats->
3511                                           send_done_count));
3512                         msleep(2000);
3513                         printk(KERN_INFO
3514                                "myri10ge: %s: (%d): %d %d %d %d %d %d\n",
3515                                mgp->dev->name, i, tx->queue_active, tx->req,
3516                                tx->done, tx->pkt_start, tx->pkt_done,
3517                                (int)ntohl(mgp->ss[i].fw_stats->
3518                                           send_done_count));
3519                 }
3520         }
3521
3522         if (!rebooted) {
3523                 rtnl_lock();
3524                 myri10ge_close(mgp->dev);
3525         }
3526         status = myri10ge_load_firmware(mgp, 1);
3527         if (status != 0)
3528                 printk(KERN_ERR "myri10ge: %s: failed to load firmware\n",
3529                        mgp->dev->name);
3530         else
3531                 myri10ge_open(mgp->dev);
3532         rtnl_unlock();
3533 }
3534
3535 /*
3536  * We use our own timer routine rather than relying upon
3537  * netdev->tx_timeout because we have a very large hardware transmit
3538  * queue.  Due to the large queue, the netdev->tx_timeout function
3539  * cannot detect a NIC with a parity error in a timely fashion if the
3540  * NIC is lightly loaded.
3541  */
3542 static void myri10ge_watchdog_timer(unsigned long arg)
3543 {
3544         struct myri10ge_priv *mgp;
3545         struct myri10ge_slice_state *ss;
3546         int i, reset_needed, busy_slice_cnt;
3547         u32 rx_pause_cnt;
3548         u16 cmd;
3549
3550         mgp = (struct myri10ge_priv *)arg;
3551
3552         rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3553         busy_slice_cnt = 0;
3554         for (i = 0, reset_needed = 0;
3555              i < mgp->num_slices && reset_needed == 0; ++i) {
3556
3557                 ss = &mgp->ss[i];
3558                 if (ss->rx_small.watchdog_needed) {
3559                         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3560                                                 mgp->small_bytes + MXGEFW_PAD,
3561                                                 1);
3562                         if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3563                             myri10ge_fill_thresh)
3564                                 ss->rx_small.watchdog_needed = 0;
3565                 }
3566                 if (ss->rx_big.watchdog_needed) {
3567                         myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3568                                                 mgp->big_bytes, 1);
3569                         if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3570                             myri10ge_fill_thresh)
3571                                 ss->rx_big.watchdog_needed = 0;
3572                 }
3573
3574                 if (ss->tx.req != ss->tx.done &&
3575                     ss->tx.done == ss->watchdog_tx_done &&
3576                     ss->watchdog_tx_req != ss->watchdog_tx_done) {
3577                         /* nic seems like it might be stuck.. */
3578                         if (rx_pause_cnt != mgp->watchdog_pause) {
3579                                 if (net_ratelimit())
3580                                         printk(KERN_WARNING
3581                                                "myri10ge %s slice %d:"
3582                                                "TX paused, check link partner\n",
3583                                                mgp->dev->name, i);
3584                         } else {
3585                                 printk(KERN_WARNING
3586                                        "myri10ge %s slice %d stuck:",
3587                                        mgp->dev->name, i);
3588                                 reset_needed = 1;
3589                         }
3590                 }
3591                 if (ss->watchdog_tx_done != ss->tx.done ||
3592                     ss->watchdog_rx_done != ss->rx_done.cnt) {
3593                         busy_slice_cnt++;
3594                 }
3595                 ss->watchdog_tx_done = ss->tx.done;
3596                 ss->watchdog_tx_req = ss->tx.req;
3597                 ss->watchdog_rx_done = ss->rx_done.cnt;
3598         }
3599         /* if we've sent or received no traffic, poll the NIC to
3600          * ensure it is still there.  Otherwise, we risk not noticing
3601          * an error in a timely fashion */
3602         if (busy_slice_cnt == 0) {
3603                 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3604                 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3605                         reset_needed = 1;
3606                 }
3607         }
3608         mgp->watchdog_pause = rx_pause_cnt;
3609
3610         if (reset_needed) {
3611                 schedule_work(&mgp->watchdog_work);
3612         } else {
3613                 /* rearm timer */
3614                 mod_timer(&mgp->watchdog_timer,
3615                           jiffies + myri10ge_watchdog_timeout * HZ);
3616         }
3617 }
3618
3619 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3620 {
3621         struct myri10ge_slice_state *ss;
3622         struct pci_dev *pdev = mgp->pdev;
3623         size_t bytes;
3624         int i;
3625
3626         if (mgp->ss == NULL)
3627                 return;
3628
3629         for (i = 0; i < mgp->num_slices; i++) {
3630                 ss = &mgp->ss[i];
3631                 if (ss->rx_done.entry != NULL) {
3632                         bytes = mgp->max_intr_slots *
3633                             sizeof(*ss->rx_done.entry);
3634                         dma_free_coherent(&pdev->dev, bytes,
3635                                           ss->rx_done.entry, ss->rx_done.bus);
3636                         ss->rx_done.entry = NULL;
3637                 }
3638                 if (ss->fw_stats != NULL) {
3639                         bytes = sizeof(*ss->fw_stats);
3640                         dma_free_coherent(&pdev->dev, bytes,
3641                                           ss->fw_stats, ss->fw_stats_bus);
3642                         ss->fw_stats = NULL;
3643                 }
3644         }
3645         kfree(mgp->ss);
3646         mgp->ss = NULL;
3647 }
3648
3649 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3650 {
3651         struct myri10ge_slice_state *ss;
3652         struct pci_dev *pdev = mgp->pdev;
3653         size_t bytes;
3654         int i;
3655
3656         bytes = sizeof(*mgp->ss) * mgp->num_slices;
3657         mgp->ss = kzalloc(bytes, GFP_KERNEL);
3658         if (mgp->ss == NULL) {
3659                 return -ENOMEM;
3660         }
3661
3662         for (i = 0; i < mgp->num_slices; i++) {
3663                 ss = &mgp->ss[i];
3664                 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3665                 ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3666                                                        &ss->rx_done.bus,
3667                                                        GFP_KERNEL);
3668                 if (ss->rx_done.entry == NULL)
3669                         goto abort;
3670                 memset(ss->rx_done.entry, 0, bytes);
3671                 bytes = sizeof(*ss->fw_stats);
3672                 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3673                                                   &ss->fw_stats_bus,
3674                                                   GFP_KERNEL);
3675                 if (ss->fw_stats == NULL)
3676                         goto abort;
3677                 ss->mgp = mgp;
3678                 ss->dev = mgp->dev;
3679                 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3680                                myri10ge_napi_weight);
3681         }
3682         return 0;
3683 abort:
3684         myri10ge_free_slices(mgp);
3685         return -ENOMEM;
3686 }
3687
3688 /*
3689  * This function determines the number of slices supported.
3690  * The number slices is the minumum of the number of CPUS,
3691  * the number of MSI-X irqs supported, the number of slices
3692  * supported by the firmware
3693  */
3694 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3695 {
3696         struct myri10ge_cmd cmd;
3697         struct pci_dev *pdev = mgp->pdev;
3698         char *old_fw;
3699         int i, status, ncpus, msix_cap;
3700
3701         mgp->num_slices = 1;
3702         msix_cap = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3703         ncpus = num_online_cpus();
3704
3705         if (myri10ge_max_slices == 1 || msix_cap == 0 ||
3706             (myri10ge_max_slices == -1 && ncpus < 2))
3707                 return;
3708
3709         /* try to load the slice aware rss firmware */
3710         old_fw = mgp->fw_name;
3711         if (myri10ge_fw_name != NULL) {
3712                 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3713                          myri10ge_fw_name);
3714                 mgp->fw_name = myri10ge_fw_name;
3715         } else if (old_fw == myri10ge_fw_aligned)
3716                 mgp->fw_name = myri10ge_fw_rss_aligned;
3717         else
3718                 mgp->fw_name = myri10ge_fw_rss_unaligned;
3719         status = myri10ge_load_firmware(mgp, 0);
3720         if (status != 0) {
3721                 dev_info(&pdev->dev, "Rss firmware not found\n");
3722                 return;
3723         }
3724
3725         /* hit the board with a reset to ensure it is alive */
3726         memset(&cmd, 0, sizeof(cmd));
3727         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3728         if (status != 0) {
3729                 dev_err(&mgp->pdev->dev, "failed reset\n");
3730                 goto abort_with_fw;
3731                 return;
3732         }
3733
3734         mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3735
3736         /* tell it the size of the interrupt queues */
3737         cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3738         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3739         if (status != 0) {
3740                 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3741                 goto abort_with_fw;
3742         }
3743
3744         /* ask the maximum number of slices it supports */
3745         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3746         if (status != 0)
3747                 goto abort_with_fw;
3748         else
3749                 mgp->num_slices = cmd.data0;
3750
3751         /* Only allow multiple slices if MSI-X is usable */
3752         if (!myri10ge_msi) {
3753                 goto abort_with_fw;
3754         }
3755
3756         /* if the admin did not specify a limit to how many
3757          * slices we should use, cap it automatically to the
3758          * number of CPUs currently online */
3759         if (myri10ge_max_slices == -1)
3760                 myri10ge_max_slices = ncpus;
3761
3762         if (mgp->num_slices > myri10ge_max_slices)
3763                 mgp->num_slices = myri10ge_max_slices;
3764
3765         /* Now try to allocate as many MSI-X vectors as we have
3766          * slices. We give up on MSI-X if we can only get a single
3767          * vector. */
3768
3769         mgp->msix_vectors = kzalloc(mgp->num_slices *
3770                                     sizeof(*mgp->msix_vectors), GFP_KERNEL);
3771         if (mgp->msix_vectors == NULL)
3772                 goto disable_msix;
3773         for (i = 0; i < mgp->num_slices; i++) {
3774                 mgp->msix_vectors[i].entry = i;
3775         }
3776
3777         while (mgp->num_slices > 1) {
3778                 /* make sure it is a power of two */
3779                 while (!is_power_of_2(mgp->num_slices))
3780                         mgp->num_slices--;
3781                 if (mgp->num_slices == 1)
3782                         goto disable_msix;
3783                 status = pci_enable_msix(pdev, mgp->msix_vectors,
3784                                          mgp->num_slices);
3785                 if (status == 0) {
3786                         pci_disable_msix(pdev);
3787                         return;
3788                 }
3789                 if (status > 0)
3790                         mgp->num_slices = status;
3791                 else
3792                         goto disable_msix;
3793         }
3794
3795 disable_msix:
3796         if (mgp->msix_vectors != NULL) {
3797                 kfree(mgp->msix_vectors);
3798                 mgp->msix_vectors = NULL;
3799         }
3800
3801 abort_with_fw:
3802         mgp->num_slices = 1;
3803         mgp->fw_name = old_fw;
3804         myri10ge_load_firmware(mgp, 0);
3805 }
3806
3807 static const struct net_device_ops myri10ge_netdev_ops = {
3808         .ndo_open               = myri10ge_open,
3809         .ndo_stop               = myri10ge_close,
3810         .ndo_start_xmit         = myri10ge_xmit,
3811         .ndo_get_stats          = myri10ge_get_stats,
3812         .ndo_validate_addr      = eth_validate_addr,
3813         .ndo_change_mtu         = myri10ge_change_mtu,
3814         .ndo_set_multicast_list = myri10ge_set_multicast_list,
3815         .ndo_set_mac_address    = myri10ge_set_mac_address,
3816 };
3817
3818 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3819 {
3820         struct net_device *netdev;
3821         struct myri10ge_priv *mgp;
3822         struct device *dev = &pdev->dev;
3823         int i;
3824         int status = -ENXIO;
3825         int dac_enabled;
3826         unsigned hdr_offset, ss_offset;
3827         static int board_number;
3828
3829         netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3830         if (netdev == NULL) {
3831                 dev_err(dev, "Could not allocate ethernet device\n");
3832                 return -ENOMEM;
3833         }
3834
3835         SET_NETDEV_DEV(netdev, &pdev->dev);
3836
3837         mgp = netdev_priv(netdev);
3838         mgp->dev = netdev;
3839         mgp->pdev = pdev;
3840         mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
3841         mgp->pause = myri10ge_flow_control;
3842         mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3843         mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3844         mgp->board_number = board_number;
3845         init_waitqueue_head(&mgp->down_wq);
3846
3847         if (pci_enable_device(pdev)) {
3848                 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3849                 status = -ENODEV;
3850                 goto abort_with_netdev;
3851         }
3852
3853         /* Find the vendor-specific cap so we can check
3854          * the reboot register later on */
3855         mgp->vendor_specific_offset
3856             = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3857
3858         /* Set our max read request to 4KB */
3859         status = pcie_set_readrq(pdev, 4096);
3860         if (status != 0) {
3861                 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3862                         status);
3863                 goto abort_with_enabled;
3864         }
3865
3866         pci_set_master(pdev);
3867         dac_enabled = 1;
3868         status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3869         if (status != 0) {
3870                 dac_enabled = 0;
3871                 dev_err(&pdev->dev,
3872                         "64-bit pci address mask was refused, "
3873                         "trying 32-bit\n");
3874                 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3875         }
3876         if (status != 0) {
3877                 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3878                 goto abort_with_enabled;
3879         }
3880         (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
3881         mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3882                                       &mgp->cmd_bus, GFP_KERNEL);
3883         if (mgp->cmd == NULL)
3884                 goto abort_with_enabled;
3885
3886         mgp->board_span = pci_resource_len(pdev, 0);
3887         mgp->iomem_base = pci_resource_start(pdev, 0);
3888         mgp->mtrr = -1;
3889         mgp->wc_enabled = 0;
3890 #ifdef CONFIG_MTRR
3891         mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
3892                              MTRR_TYPE_WRCOMB, 1);
3893         if (mgp->mtrr >= 0)
3894                 mgp->wc_enabled = 1;
3895 #endif
3896         mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3897         if (mgp->sram == NULL) {
3898                 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3899                         mgp->board_span, mgp->iomem_base);
3900                 status = -ENXIO;
3901                 goto abort_with_mtrr;
3902         }
3903         hdr_offset =
3904             ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
3905         ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
3906         mgp->sram_size = ntohl(__raw_readl(mgp->sram + ss_offset));
3907         if (mgp->sram_size > mgp->board_span ||
3908             mgp->sram_size <= MYRI10GE_FW_OFFSET) {
3909                 dev_err(&pdev->dev,
3910                         "invalid sram_size %dB or board span %ldB\n",
3911                         mgp->sram_size, mgp->board_span);
3912                 goto abort_with_ioremap;
3913         }
3914         memcpy_fromio(mgp->eeprom_strings,
3915                       mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
3916         memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3917         status = myri10ge_read_mac_addr(mgp);
3918         if (status)
3919                 goto abort_with_ioremap;
3920
3921         for (i = 0; i < ETH_ALEN; i++)
3922                 netdev->dev_addr[i] = mgp->mac_addr[i];
3923
3924         myri10ge_select_firmware(mgp);
3925
3926         status = myri10ge_load_firmware(mgp, 1);
3927         if (status != 0) {
3928                 dev_err(&pdev->dev, "failed to load firmware\n");
3929                 goto abort_with_ioremap;
3930         }
3931         myri10ge_probe_slices(mgp);
3932         status = myri10ge_alloc_slices(mgp);
3933         if (status != 0) {
3934                 dev_err(&pdev->dev, "failed to alloc slice state\n");
3935                 goto abort_with_firmware;
3936         }
3937         netdev->real_num_tx_queues = mgp->num_slices;
3938         status = myri10ge_reset(mgp);
3939         if (status != 0) {
3940                 dev_err(&pdev->dev, "failed reset\n");
3941                 goto abort_with_slices;
3942         }
3943 #ifdef CONFIG_MYRI10GE_DCA
3944         myri10ge_setup_dca(mgp);
3945 #endif
3946         pci_set_drvdata(pdev, mgp);
3947         if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
3948                 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3949         if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
3950                 myri10ge_initial_mtu = 68;
3951
3952         netdev->netdev_ops = &myri10ge_netdev_ops;
3953         netdev->mtu = myri10ge_initial_mtu;
3954         netdev->base_addr = mgp->iomem_base;
3955         netdev->features = mgp->features;
3956
3957         if (dac_enabled)
3958                 netdev->features |= NETIF_F_HIGHDMA;
3959         netdev->features |= NETIF_F_LRO;
3960
3961         netdev->vlan_features |= mgp->features;
3962         if (mgp->fw_ver_tiny < 37)
3963                 netdev->vlan_features &= ~NETIF_F_TSO6;
3964         if (mgp->fw_ver_tiny < 32)
3965                 netdev->vlan_features &= ~NETIF_F_TSO;
3966
3967         /* make sure we can get an irq, and that MSI can be
3968          * setup (if available).  Also ensure netdev->irq
3969          * is set to correct value if MSI is enabled */
3970         status = myri10ge_request_irq(mgp);
3971         if (status != 0)
3972                 goto abort_with_firmware;
3973         netdev->irq = pdev->irq;
3974         myri10ge_free_irq(mgp);
3975
3976         /* Save configuration space to be restored if the
3977          * nic resets due to a parity error */
3978         pci_save_state(pdev);
3979
3980         /* Setup the watchdog timer */
3981         setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3982                     (unsigned long)mgp);
3983
3984         spin_lock_init(&mgp->stats_lock);
3985         SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
3986         INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3987         status = register_netdev(netdev);
3988         if (status != 0) {
3989                 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3990                 goto abort_with_state;
3991         }
3992         if (mgp->msix_enabled)
3993                 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n",
3994                          mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
3995                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
3996         else
3997                 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
3998                          mgp->msi_enabled ? "MSI" : "xPIC",
3999                          netdev->irq, mgp->tx_boundary, mgp->fw_name,
4000                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
4001
4002         board_number++;
4003         return 0;
4004
4005 abort_with_state:
4006         pci_restore_state(pdev);
4007
4008 abort_with_slices:
4009         myri10ge_free_slices(mgp);
4010
4011 abort_with_firmware:
4012         myri10ge_dummy_rdma(mgp, 0);
4013
4014 abort_with_ioremap:
4015         if (mgp->mac_addr_string != NULL)
4016                 dev_err(&pdev->dev,
4017                         "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
4018                         mgp->mac_addr_string, mgp->serial_number);
4019         iounmap(mgp->sram);
4020
4021 abort_with_mtrr:
4022 #ifdef CONFIG_MTRR
4023         if (mgp->mtrr >= 0)
4024                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4025 #endif
4026         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4027                           mgp->cmd, mgp->cmd_bus);
4028
4029 abort_with_enabled:
4030         pci_disable_device(pdev);
4031
4032 abort_with_netdev:
4033         free_netdev(netdev);
4034         return status;
4035 }
4036
4037 /*
4038  * myri10ge_remove
4039  *
4040  * Does what is necessary to shutdown one Myrinet device. Called
4041  *   once for each Myrinet card by the kernel when a module is
4042  *   unloaded.
4043  */
4044 static void myri10ge_remove(struct pci_dev *pdev)
4045 {
4046         struct myri10ge_priv *mgp;
4047         struct net_device *netdev;
4048
4049         mgp = pci_get_drvdata(pdev);
4050         if (mgp == NULL)
4051                 return;
4052
4053         flush_scheduled_work();
4054         netdev = mgp->dev;
4055         unregister_netdev(netdev);
4056
4057 #ifdef CONFIG_MYRI10GE_DCA
4058         myri10ge_teardown_dca(mgp);
4059 #endif
4060         myri10ge_dummy_rdma(mgp, 0);
4061
4062         /* avoid a memory leak */
4063         pci_restore_state(pdev);
4064
4065         iounmap(mgp->sram);
4066
4067 #ifdef CONFIG_MTRR
4068         if (mgp->mtrr >= 0)
4069                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4070 #endif
4071         myri10ge_free_slices(mgp);
4072         if (mgp->msix_vectors != NULL)
4073                 kfree(mgp->msix_vectors);
4074         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4075                           mgp->cmd, mgp->cmd_bus);
4076
4077         free_netdev(netdev);
4078         pci_disable_device(pdev);
4079         pci_set_drvdata(pdev, NULL);
4080 }
4081
4082 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E      0x0008
4083 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9    0x0009
4084
4085 static struct pci_device_id myri10ge_pci_tbl[] = {
4086         {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
4087         {PCI_DEVICE
4088          (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
4089         {0},
4090 };
4091
4092 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl);
4093
4094 static struct pci_driver myri10ge_driver = {
4095         .name = "myri10ge",
4096         .probe = myri10ge_probe,
4097         .remove = myri10ge_remove,
4098         .id_table = myri10ge_pci_tbl,
4099 #ifdef CONFIG_PM
4100         .suspend = myri10ge_suspend,
4101         .resume = myri10ge_resume,
4102 #endif
4103 };
4104
4105 #ifdef CONFIG_MYRI10GE_DCA
4106 static int
4107 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4108 {
4109         int err = driver_for_each_device(&myri10ge_driver.driver,
4110                                          NULL, &event,
4111                                          myri10ge_notify_dca_device);
4112
4113         if (err)
4114                 return NOTIFY_BAD;
4115         return NOTIFY_DONE;
4116 }
4117
4118 static struct notifier_block myri10ge_dca_notifier = {
4119         .notifier_call = myri10ge_notify_dca,
4120         .next = NULL,
4121         .priority = 0,
4122 };
4123 #endif                          /* CONFIG_MYRI10GE_DCA */
4124
4125 static __init int myri10ge_init_module(void)
4126 {
4127         printk(KERN_INFO "%s: Version %s\n", myri10ge_driver.name,
4128                MYRI10GE_VERSION_STR);
4129
4130         if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4131                 printk(KERN_ERR
4132                        "%s: Illegal rssh hash type %d, defaulting to source port\n",
4133                        myri10ge_driver.name, myri10ge_rss_hash);
4134                 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4135         }
4136 #ifdef CONFIG_MYRI10GE_DCA
4137         dca_register_notify(&myri10ge_dca_notifier);
4138 #endif
4139         if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4140                 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4141
4142         return pci_register_driver(&myri10ge_driver);
4143 }
4144
4145 module_init(myri10ge_init_module);
4146
4147 static __exit void myri10ge_cleanup_module(void)
4148 {
4149 #ifdef CONFIG_MYRI10GE_DCA
4150         dca_unregister_notify(&myri10ge_dca_notifier);
4151 #endif
4152         pci_unregister_driver(&myri10ge_driver);
4153 }
4154
4155 module_exit(myri10ge_cleanup_module);