drivers/net/atl1/atl1_main.c

   1 /*
   2  * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
   3  * Copyright(c) 2006 Chris Snook <csnook@redhat.com>
   4  * Copyright(c) 2006 Jay Cliburn <jcliburn@gmail.com>
   5  *
   6  * Derived from Intel e1000 driver
   7  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the Free
  11  * Software Foundation; either version 2 of the License, or (at your option)
  12  * any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along with
  20  * this program; if not, write to the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  *
  23  * The full GNU General Public License is included in this distribution in the
  24  * file called COPYING.
  25  *
  26  * Contact Information:
  27  * Xiong Huang <xiong_huang@attansic.com>
  28  * Attansic Technology Corp. 3F 147, Xianzheng 9th Road, Zhubei,
  29  * Xinzhu  302, TAIWAN, REPUBLIC OF CHINA
  30  *
  31  * Chris Snook <csnook@redhat.com>
  32  * Jay Cliburn <jcliburn@gmail.com>
  33  *
  34  * This version is adapted from the Attansic reference driver for
  35  * inclusion in the Linux kernel.  It is currently under heavy development.
  36  * A very incomplete list of things that need to be dealt with:
  37  *
  38  * TODO:
  39  * Fix TSO; tx performance is horrible with TSO enabled.
  40  * Wake on LAN.
  41  * Add more ethtool functions, including set ring parameters.
  42  * Fix abstruse irq enable/disable condition described here:
  43  *      http://marc.theaimsgroup.com/?l=linux-netdev&m=116398508500553&w=2
  44  *
  45  * NEEDS TESTING:
  46  * VLAN
  47  * multicast
  48  * promiscuous mode
  49  * interrupt coalescing
  50  * SMP torture testing
  51  */
  52
  53 #include <linux/types.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/pci.h>
  56 #include <linux/spinlock.h>
  57 #include <linux/slab.h>
  58 #include <linux/string.h>
  59 #include <linux/skbuff.h>
  60 #include <linux/etherdevice.h>
  61 #include <linux/if_vlan.h>
  62 #include <linux/irqreturn.h>
  63 #include <linux/workqueue.h>
  64 #include <linux/timer.h>
  65 #include <linux/jiffies.h>
  66 #include <linux/hardirq.h>
  67 #include <linux/interrupt.h>
  68 #include <linux/irqflags.h>
  69 #include <linux/dma-mapping.h>
  70 #include <linux/net.h>
  71 #include <linux/pm.h>
  72 #include <linux/in.h>
  73 #include <linux/ip.h>
  74 #include <linux/tcp.h>
  75 #include <linux/compiler.h>
  76 #include <linux/delay.h>
  77 #include <linux/mii.h>
  78 #include <net/checksum.h>
  79
  80 #include <asm/atomic.h>
  81 #include <asm/byteorder.h>
  82
  83 #include "atl1.h"
  84
  85 #define DRIVER_VERSION "2.0.7"
  86
  87 char atl1_driver_name[] = "atl1";
  88 static const char atl1_driver_string[] = "Attansic L1 Ethernet Network Driver";
  89 static const char atl1_copyright[] = "Copyright(c) 2005-2006 Attansic Corporation.";
  90 char atl1_driver_version[] = DRIVER_VERSION;
  91
  92 MODULE_AUTHOR
  93     ("Attansic Corporation <xiong_huang@attansic.com>, Chris Snook <csnook@redhat.com>, Jay Cliburn <jcliburn@gmail.com>");
  94 MODULE_DESCRIPTION("Attansic 1000M Ethernet Network Driver");
  95 MODULE_LICENSE("GPL");
  96 MODULE_VERSION(DRIVER_VERSION);
  97
  98 /*
  99  * atl1_pci_tbl - PCI Device ID Table
 100  */
 101 static const struct pci_device_id atl1_pci_tbl[] = {
 102         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1)},
 103         /* required last entry */
 104         {0,}
 105 };
 106
 107 MODULE_DEVICE_TABLE(pci, atl1_pci_tbl);
 108
 109 /*
 110  * atl1_sw_init - Initialize general software structures (struct atl1_adapter)
 111  * @adapter: board private structure to initialize
 112  *
 113  * atl1_sw_init initializes the Adapter private data structure.
 114  * Fields are initialized based on PCI device information and
 115  * OS network device settings (MTU size).
 116  */
 117 static int __devinit atl1_sw_init(struct atl1_adapter *adapter)
 118 {
 119         struct atl1_hw *hw = &adapter->hw;
 120         struct net_device *netdev = adapter->netdev;
 121         struct pci_dev *pdev = adapter->pdev;
 122
 123         /* PCI config space info */
 124         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 125
 126         hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 127         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 128
 129         adapter->wol = 0;
 130         adapter->rx_buffer_len = (hw->max_frame_size + 7) & ~7;
 131         adapter->ict = 50000;   /* 100ms */
 132         adapter->link_speed = SPEED_0;  /* hardware init */
 133         adapter->link_duplex = FULL_DUPLEX;
 134
 135         hw->phy_configured = false;
 136         hw->preamble_len = 7;
 137         hw->ipgt = 0x60;
 138         hw->min_ifg = 0x50;
 139         hw->ipgr1 = 0x40;
 140         hw->ipgr2 = 0x60;
 141         hw->max_retry = 0xf;
 142         hw->lcol = 0x37;
 143         hw->jam_ipg = 7;
 144         hw->rfd_burst = 8;
 145         hw->rrd_burst = 8;
 146         hw->rfd_fetch_gap = 1;
 147         hw->rx_jumbo_th = adapter->rx_buffer_len / 8;
 148         hw->rx_jumbo_lkah = 1;
 149         hw->rrd_ret_timer = 16;
 150         hw->tpd_burst = 4;
 151         hw->tpd_fetch_th = 16;
 152         hw->txf_burst = 0x100;
 153         hw->tx_jumbo_task_th = (hw->max_frame_size + 7) >> 3;
 154         hw->tpd_fetch_gap = 1;
 155         hw->rcb_value = atl1_rcb_64;
 156         hw->dma_ord = atl1_dma_ord_enh;
 157         hw->dmar_block = atl1_dma_req_256;
 158         hw->dmaw_block = atl1_dma_req_256;
 159         hw->cmb_rrd = 4;
 160         hw->cmb_tpd = 4;
 161         hw->cmb_rx_timer = 1;   /* about 2us */
 162         hw->cmb_tx_timer = 1;   /* about 2us */
 163         hw->smb_timer = 100000; /* about 200ms */
 164
 165         atomic_set(&adapter->irq_sem, 0);
 166         spin_lock_init(&adapter->lock);
 167         spin_lock_init(&adapter->mb_lock);
 168
 169         return 0;
 170 }
 171
 172 /*
 173  * atl1_setup_mem_resources - allocate Tx / RX descriptor resources
 174  * @adapter: board private structure
 175  *
 176  * Return 0 on success, negative on failure
 177  */
 178 s32 atl1_setup_ring_resources(struct atl1_adapter *adapter)
 179 {
 180         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 181         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 182         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 183         struct atl1_ring_header *ring_header = &adapter->ring_header;
 184         struct pci_dev *pdev = adapter->pdev;
 185         int size;
 186         u8 offset = 0;
 187
 188         size = sizeof(struct atl1_buffer) * (tpd_ring->count + rfd_ring->count);
 189         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 190         if (unlikely(!tpd_ring->buffer_info)) {
 191                 printk(KERN_WARNING "%s: kzalloc failed , size = D%d\n",
 192                         atl1_driver_name, size);
 193                 goto err_nomem;
 194         }
 195         rfd_ring->buffer_info =
 196             (struct atl1_buffer *)(tpd_ring->buffer_info + tpd_ring->count);
 197
 198         /* real ring DMA buffer */
 199         ring_header->size = size = sizeof(struct tx_packet_desc) *
 200                                         tpd_ring->count
 201             + sizeof(struct rx_free_desc) * rfd_ring->count
 202             + sizeof(struct rx_return_desc) * rrd_ring->count
 203             + sizeof(struct coals_msg_block)
 204             + sizeof(struct stats_msg_block)
 205             + 40;               /* "40: for 8 bytes align" huh? -- CHS */
 206
 207         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 208                                                 &ring_header->dma);
 209         if (unlikely(!ring_header->desc)) {
 210                 printk(KERN_WARNING
 211                         "%s: pci_alloc_consistent failed, size = D%d\n",
 212                         atl1_driver_name, size);
 213                 goto err_nomem;
 214         }
 215
 216         memset(ring_header->desc, 0, ring_header->size);
 217
 218         /* init TPD ring */
 219         tpd_ring->dma = ring_header->dma;
 220         offset = (tpd_ring->dma & 0x7) ? (8 - (ring_header->dma & 0x7)) : 0;
 221         tpd_ring->dma += offset;
 222         tpd_ring->desc = (u8 *) ring_header->desc + offset;
 223         tpd_ring->size = sizeof(struct tx_packet_desc) * tpd_ring->count;
 224         atomic_set(&tpd_ring->next_to_use, 0);
 225         atomic_set(&tpd_ring->next_to_clean, 0);
 226
 227         /* init RFD ring */
 228         rfd_ring->dma = tpd_ring->dma + tpd_ring->size;
 229         offset = (rfd_ring->dma & 0x7) ? (8 - (rfd_ring->dma & 0x7)) : 0;
 230         rfd_ring->dma += offset;
 231         rfd_ring->desc = (u8 *) tpd_ring->desc + (tpd_ring->size + offset);
 232         rfd_ring->size = sizeof(struct rx_free_desc) * rfd_ring->count;
 233         rfd_ring->next_to_clean = 0;
 234         /* rfd_ring->next_to_use = rfd_ring->count - 1; */
 235         atomic_set(&rfd_ring->next_to_use, 0);
 236
 237         /* init RRD ring */
 238         rrd_ring->dma = rfd_ring->dma + rfd_ring->size;
 239         offset = (rrd_ring->dma & 0x7) ? (8 - (rrd_ring->dma & 0x7)) : 0;
 240         rrd_ring->dma += offset;
 241         rrd_ring->desc = (u8 *) rfd_ring->desc + (rfd_ring->size + offset);
 242         rrd_ring->size = sizeof(struct rx_return_desc) * rrd_ring->count;
 243         rrd_ring->next_to_use = 0;
 244         atomic_set(&rrd_ring->next_to_clean, 0);
 245
 246         /* init CMB */
 247         adapter->cmb.dma = rrd_ring->dma + rrd_ring->size;
 248         offset = (adapter->cmb.dma & 0x7) ? (8 - (adapter->cmb.dma & 0x7)) : 0;
 249         adapter->cmb.dma += offset;
 250         adapter->cmb.cmb =
 251             (struct coals_msg_block *) ((u8 *) rrd_ring->desc +
 252                                    (rrd_ring->size + offset));
 253
 254         /* init SMB */
 255         adapter->smb.dma = adapter->cmb.dma + sizeof(struct coals_msg_block);
 256         offset = (adapter->smb.dma & 0x7) ? (8 - (adapter->smb.dma & 0x7)) : 0;
 257         adapter->smb.dma += offset;
 258         adapter->smb.smb = (struct stats_msg_block *)
 259             ((u8 *) adapter->cmb.cmb + (sizeof(struct coals_msg_block) + offset));
 260
 261         return ATL1_SUCCESS;
 262
 263 err_nomem:
 264         kfree(tpd_ring->buffer_info);
 265         return -ENOMEM;
 266 }
 267
 268 /*
 269  * atl1_irq_enable - Enable default interrupt generation settings
 270  * @adapter: board private structure
 271  */
 272 static void atl1_irq_enable(struct atl1_adapter *adapter)
 273 {
 274         if (likely(!atomic_dec_and_test(&adapter->irq_sem)))
 275                 iowrite32(IMR_NORMAL_MASK, adapter->hw.hw_addr + REG_IMR);
 276 }
 277
 278 static void atl1_clear_phy_int(struct atl1_adapter *adapter)
 279 {
 280         u16 phy_data;
 281         unsigned long flags;
 282
 283         spin_lock_irqsave(&adapter->lock, flags);
 284         atl1_read_phy_reg(&adapter->hw, 19, &phy_data);
 285         spin_unlock_irqrestore(&adapter->lock, flags);
 286 }
 287
 288 static void atl1_inc_smb(struct atl1_adapter *adapter)
 289 {
 290         struct stats_msg_block *smb = adapter->smb.smb;
 291
 292         /* Fill out the OS statistics structure */
 293         adapter->soft_stats.rx_packets += smb->rx_ok;
 294         adapter->soft_stats.tx_packets += smb->tx_ok;
 295         adapter->soft_stats.rx_bytes += smb->rx_byte_cnt;
 296         adapter->soft_stats.tx_bytes += smb->tx_byte_cnt;
 297         adapter->soft_stats.multicast += smb->rx_mcast;
 298         adapter->soft_stats.collisions += (smb->tx_1_col +
 299                                            smb->tx_2_col * 2 +
 300                                            smb->tx_late_col +
 301                                            smb->tx_abort_col *
 302                                            adapter->hw.max_retry);
 303
 304         /* Rx Errors */
 305         adapter->soft_stats.rx_errors += (smb->rx_frag +
 306                                           smb->rx_fcs_err +
 307                                           smb->rx_len_err +
 308                                           smb->rx_sz_ov +
 309                                           smb->rx_rxf_ov +
 310                                           smb->rx_rrd_ov + smb->rx_align_err);
 311         adapter->soft_stats.rx_fifo_errors += smb->rx_rxf_ov;
 312         adapter->soft_stats.rx_length_errors += smb->rx_len_err;
 313         adapter->soft_stats.rx_crc_errors += smb->rx_fcs_err;
 314         adapter->soft_stats.rx_frame_errors += smb->rx_align_err;
 315         adapter->soft_stats.rx_missed_errors += (smb->rx_rrd_ov +
 316                                                  smb->rx_rxf_ov);
 317
 318         adapter->soft_stats.rx_pause += smb->rx_pause;
 319         adapter->soft_stats.rx_rrd_ov += smb->rx_rrd_ov;
 320         adapter->soft_stats.rx_trunc += smb->rx_sz_ov;
 321
 322         /* Tx Errors */
 323         adapter->soft_stats.tx_errors += (smb->tx_late_col +
 324                                           smb->tx_abort_col +
 325                                           smb->tx_underrun + smb->tx_trunc);
 326         adapter->soft_stats.tx_fifo_errors += smb->tx_underrun;
 327         adapter->soft_stats.tx_aborted_errors += smb->tx_abort_col;
 328         adapter->soft_stats.tx_window_errors += smb->tx_late_col;
 329
 330         adapter->soft_stats.excecol += smb->tx_abort_col;
 331         adapter->soft_stats.deffer += smb->tx_defer;
 332         adapter->soft_stats.scc += smb->tx_1_col;
 333         adapter->soft_stats.mcc += smb->tx_2_col;
 334         adapter->soft_stats.latecol += smb->tx_late_col;
 335         adapter->soft_stats.tx_underun += smb->tx_underrun;
 336         adapter->soft_stats.tx_trunc += smb->tx_trunc;
 337         adapter->soft_stats.tx_pause += smb->tx_pause;
 338
 339         adapter->net_stats.rx_packets = adapter->soft_stats.rx_packets;
 340         adapter->net_stats.tx_packets = adapter->soft_stats.tx_packets;
 341         adapter->net_stats.rx_bytes = adapter->soft_stats.rx_bytes;
 342         adapter->net_stats.tx_bytes = adapter->soft_stats.tx_bytes;
 343         adapter->net_stats.multicast = adapter->soft_stats.multicast;
 344         adapter->net_stats.collisions = adapter->soft_stats.collisions;
 345         adapter->net_stats.rx_errors = adapter->soft_stats.rx_errors;
 346         adapter->net_stats.rx_over_errors =
 347             adapter->soft_stats.rx_missed_errors;
 348         adapter->net_stats.rx_length_errors =
 349             adapter->soft_stats.rx_length_errors;
 350         adapter->net_stats.rx_crc_errors = adapter->soft_stats.rx_crc_errors;
 351         adapter->net_stats.rx_frame_errors =
 352             adapter->soft_stats.rx_frame_errors;
 353         adapter->net_stats.rx_fifo_errors = adapter->soft_stats.rx_fifo_errors;
 354         adapter->net_stats.rx_missed_errors =
 355             adapter->soft_stats.rx_missed_errors;
 356         adapter->net_stats.tx_errors = adapter->soft_stats.tx_errors;
 357         adapter->net_stats.tx_fifo_errors = adapter->soft_stats.tx_fifo_errors;
 358         adapter->net_stats.tx_aborted_errors =
 359             adapter->soft_stats.tx_aborted_errors;
 360         adapter->net_stats.tx_window_errors =
 361             adapter->soft_stats.tx_window_errors;
 362         adapter->net_stats.tx_carrier_errors =
 363             adapter->soft_stats.tx_carrier_errors;
 364 }
 365
 366 static void atl1_rx_checksum(struct atl1_adapter *adapter,
 367                                         struct rx_return_desc *rrd,
 368                                         struct sk_buff *skb)
 369 {
 370         skb->ip_summed = CHECKSUM_NONE;
 371
 372         if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
 373                 if (rrd->err_flg & (ERR_FLAG_CRC | ERR_FLAG_TRUNC |
 374                                         ERR_FLAG_CODE | ERR_FLAG_OV)) {
 375                         adapter->hw_csum_err++;
 376                         printk(KERN_DEBUG "%s: rx checksum error\n",
 377                                 atl1_driver_name);
 378                         return;
 379                 }
 380         }
 381
 382         /* not IPv4 */
 383         if (!(rrd->pkt_flg & PACKET_FLAG_IPV4))
 384                 /* checksum is invalid, but it's not an IPv4 pkt, so ok */
 385                 return;
 386
 387         /* IPv4 packet */
 388         if (likely(!(rrd->err_flg &
 389                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM)))) {
 390                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 391                 adapter->hw_csum_good++;
 392                 return;
 393         }
 394
 395         /* IPv4, but hardware thinks its checksum is wrong */
 396         printk(KERN_DEBUG "%s: hw csum wrong pkt_flag:%x, err_flag:%x\n",
 397                 atl1_driver_name, rrd->pkt_flg, rrd->err_flg);
 398         skb->ip_summed = CHECKSUM_COMPLETE;
 399         skb->csum = htons(rrd->xsz.xsum_sz.rx_chksum);
 400         adapter->hw_csum_err++;
 401         return;
 402 }
 403
 404 /*
 405  * atl1_alloc_rx_buffers - Replace used receive buffers
 406  * @adapter: address of board private structure
 407  */
 408 static u16 atl1_alloc_rx_buffers(struct atl1_adapter *adapter)
 409 {
 410         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 411         struct pci_dev *pdev = adapter->pdev;
 412         struct page *page;
 413         unsigned long offset;
 414         struct atl1_buffer *buffer_info, *next_info;
 415         struct sk_buff *skb;
 416         u16 num_alloc = 0;
 417         u16 rfd_next_to_use, next_next;
 418         struct rx_free_desc *rfd_desc;
 419
 420         next_next = rfd_next_to_use = atomic_read(&rfd_ring->next_to_use);
 421         if (++next_next == rfd_ring->count)
 422                 next_next = 0;
 423         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
 424         next_info = &rfd_ring->buffer_info[next_next];
 425
 426         while (!buffer_info->alloced && !next_info->alloced) {
 427                 if (buffer_info->skb) {
 428                         buffer_info->alloced = 1;
 429                         goto next;
 430                 }
 431
 432                 rfd_desc = ATL1_RFD_DESC(rfd_ring, rfd_next_to_use);
 433
 434                 skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN);
 435                 if (unlikely(!skb)) {   /* Better luck next round */
 436                         adapter->net_stats.rx_dropped++;
 437                         break;
 438                 }
 439
 440                 /*
 441                  * Make buffer alignment 2 beyond a 16 byte boundary
 442                  * this will result in a 16 byte aligned IP header after
 443                  * the 14 byte MAC header is removed
 444                  */
 445                 skb_reserve(skb, NET_IP_ALIGN);
 446
 447                 buffer_info->alloced = 1;
 448                 buffer_info->skb = skb;
 449                 buffer_info->length = (u16) adapter->rx_buffer_len;
 450                 page = virt_to_page(skb->data);
 451                 offset = (unsigned long)skb->data & ~PAGE_MASK;
 452                 buffer_info->dma = pci_map_page(pdev, page, offset,
 453                                                 adapter->rx_buffer_len,
 454                                                 PCI_DMA_FROMDEVICE);
 455                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 456                 rfd_desc->buf_len = cpu_to_le16(adapter->rx_buffer_len);
 457                 rfd_desc->coalese = 0;
 458
 459 next:
 460                 rfd_next_to_use = next_next;
 461                 if (unlikely(++next_next == rfd_ring->count))
 462                         next_next = 0;
 463
 464                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
 465                 next_info = &rfd_ring->buffer_info[next_next];
 466                 num_alloc++;
 467         }
 468
 469         if (num_alloc) {
 470                 /*
 471                  * Force memory writes to complete before letting h/w
 472                  * know there are new descriptors to fetch.  (Only
 473                  * applicable for weak-ordered memory model archs,
 474                  * such as IA-64).
 475                  */
 476                 wmb();
 477                 atomic_set(&rfd_ring->next_to_use, (int)rfd_next_to_use);
 478         }
 479         return num_alloc;
 480 }
 481
 482 static void atl1_intr_rx(struct atl1_adapter *adapter)
 483 {
 484         int i, count;
 485         u16 length;
 486         u16 rrd_next_to_clean;
 487         u32 value;
 488         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 489         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 490         struct atl1_buffer *buffer_info;
 491         struct rx_return_desc *rrd;
 492         struct sk_buff *skb;
 493
 494         count = 0;
 495
 496         rrd_next_to_clean = atomic_read(&rrd_ring->next_to_clean);
 497
 498         while (1) {
 499                 rrd = ATL1_RRD_DESC(rrd_ring, rrd_next_to_clean);
 500                 i = 1;
 501                 if (likely(rrd->xsz.valid)) {   /* packet valid */
 502 chk_rrd:
 503                         /* check rrd status */
 504                         if (likely(rrd->num_buf == 1))
 505                                 goto rrd_ok;
 506
 507                         /* rrd seems to be bad */
 508                         if (unlikely(i-- > 0)) {
 509                                 /* rrd may not be DMAed completely */
 510                                 printk(KERN_DEBUG
 511                                         "%s: RRD may not be DMAed completely\n",
 512                                         atl1_driver_name);
 513                                 udelay(1);
 514                                 goto chk_rrd;
 515                         }
 516                         /* bad rrd */
 517                         printk(KERN_DEBUG "%s: bad RRD\n", atl1_driver_name);
 518                         /* see if update RFD index */
 519                         if (rrd->num_buf > 1) {
 520                                 u16 num_buf;
 521                                 num_buf =
 522                                     (rrd->xsz.xsum_sz.pkt_size +
 523                                      adapter->rx_buffer_len -
 524                                      1) / adapter->rx_buffer_len;
 525                                 if (rrd->num_buf == num_buf) {
 526                                         /* clean alloc flag for bad rrd */
 527                                         while (rfd_ring->next_to_clean !=
 528                                                (rrd->buf_indx + num_buf)) {
 529                                                 rfd_ring->buffer_info[rfd_ring->
 530                                                                       next_to_clean].alloced = 0;
 531                                                 if (++rfd_ring->next_to_clean ==
 532                                                     rfd_ring->count) {
 533                                                         rfd_ring->
 534                                                             next_to_clean = 0;
 535                                                 }
 536                                         }
 537                                 }
 538                         }
 539
 540                         /* update rrd */
 541                         rrd->xsz.valid = 0;
 542                         if (++rrd_next_to_clean == rrd_ring->count)
 543                                 rrd_next_to_clean = 0;
 544                         count++;
 545                         continue;
 546                 } else {        /* current rrd still not be updated */
 547
 548                         break;
 549                 }
 550 rrd_ok:
 551                 /* clean alloc flag for bad rrd */
 552                 while (rfd_ring->next_to_clean != rrd->buf_indx) {
 553                         rfd_ring->buffer_info[rfd_ring->next_to_clean].alloced =
 554                             0;
 555                         if (++rfd_ring->next_to_clean == rfd_ring->count)
 556                                 rfd_ring->next_to_clean = 0;
 557                 }
 558
 559                 buffer_info = &rfd_ring->buffer_info[rrd->buf_indx];
 560                 if (++rfd_ring->next_to_clean == rfd_ring->count)
 561                         rfd_ring->next_to_clean = 0;
 562
 563                 /* update rrd next to clean */
 564                 if (++rrd_next_to_clean == rrd_ring->count)
 565                         rrd_next_to_clean = 0;
 566                 count++;
 567
 568                 if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
 569                         if (!(rrd->err_flg &
 570                                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM
 571                                 | ERR_FLAG_LEN))) {
 572                                 /* packet error, don't need upstream */
 573                                 buffer_info->alloced = 0;
 574                                 rrd->xsz.valid = 0;
 575                                 continue;
 576                         }
 577                 }
 578
 579                 /* Good Receive */
 580                 pci_unmap_page(adapter->pdev, buffer_info->dma,
 581                                buffer_info->length, PCI_DMA_FROMDEVICE);
 582                 skb = buffer_info->skb;
 583                 length = le16_to_cpu(rrd->xsz.xsum_sz.pkt_size);
 584
 585                 skb_put(skb, length - ETHERNET_FCS_SIZE);
 586
 587                 /* Receive Checksum Offload */
 588                 atl1_rx_checksum(adapter, rrd, skb);
 589                 skb->protocol = eth_type_trans(skb, adapter->netdev);
 590
 591                 if (adapter->vlgrp && (rrd->pkt_flg & PACKET_FLAG_VLAN_INS)) {
 592                         u16 vlan_tag = (rrd->vlan_tag >> 4) |
 593                                         ((rrd->vlan_tag & 7) << 13) |
 594                                         ((rrd->vlan_tag & 8) << 9);
 595                         vlan_hwaccel_rx(skb, adapter->vlgrp, vlan_tag);
 596                 } else
 597                         netif_rx(skb);
 598
 599                 /* let protocol layer free skb */
 600                 buffer_info->skb = NULL;
 601                 buffer_info->alloced = 0;
 602                 rrd->xsz.valid = 0;
 603
 604                 adapter->netdev->last_rx = jiffies;
 605         }
 606
 607         atomic_set(&rrd_ring->next_to_clean, rrd_next_to_clean);
 608
 609         atl1_alloc_rx_buffers(adapter);
 610
 611         /* update mailbox ? */
 612         if (count) {
 613                 u32 tpd_next_to_use;
 614                 u32 rfd_next_to_use;
 615                 u32 rrd_next_to_clean;
 616
 617                 spin_lock(&adapter->mb_lock);
 618
 619                 tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
 620                 rfd_next_to_use =
 621                     atomic_read(&adapter->rfd_ring.next_to_use);
 622                 rrd_next_to_clean =
 623                     atomic_read(&adapter->rrd_ring.next_to_clean);
 624                 value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
 625                         MB_RFD_PROD_INDX_SHIFT) |
 626                         ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
 627                         MB_RRD_CONS_INDX_SHIFT) |
 628                         ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
 629                         MB_TPD_PROD_INDX_SHIFT);
 630                 iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
 631                 spin_unlock(&adapter->mb_lock);
 632         }
 633 }
 634
 635 static void atl1_intr_tx(struct atl1_adapter *adapter)
 636 {
 637         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 638         struct atl1_buffer *buffer_info;
 639         u16 sw_tpd_next_to_clean;
 640         u16 cmb_tpd_next_to_clean;
 641         u8 update = 0;
 642
 643         sw_tpd_next_to_clean = atomic_read(&tpd_ring->next_to_clean);
 644         cmb_tpd_next_to_clean = le16_to_cpu(adapter->cmb.cmb->tpd_cons_idx);
 645
 646         while (cmb_tpd_next_to_clean != sw_tpd_next_to_clean) {
 647                 struct tx_packet_desc *tpd;
 648                 update = 1;
 649                 tpd = ATL1_TPD_DESC(tpd_ring, sw_tpd_next_to_clean);
 650                 buffer_info = &tpd_ring->buffer_info[sw_tpd_next_to_clean];
 651                 if (buffer_info->dma) {
 652                         pci_unmap_page(adapter->pdev, buffer_info->dma,
 653                                        buffer_info->length, PCI_DMA_TODEVICE);
 654                         buffer_info->dma = 0;
 655                 }
 656
 657                 if (buffer_info->skb) {
 658                         dev_kfree_skb_irq(buffer_info->skb);
 659                         buffer_info->skb = NULL;
 660                 }
 661                 tpd->buffer_addr = 0;
 662                 tpd->desc.data = 0;
 663
 664                 if (++sw_tpd_next_to_clean == tpd_ring->count)
 665                         sw_tpd_next_to_clean = 0;
 666         }
 667         atomic_set(&tpd_ring->next_to_clean, sw_tpd_next_to_clean);
 668
 669         if (netif_queue_stopped(adapter->netdev)
 670             && netif_carrier_ok(adapter->netdev))
 671                 netif_wake_queue(adapter->netdev);
 672 }
 673
 674 static void atl1_check_for_link(struct atl1_adapter *adapter)
 675 {
 676         struct net_device *netdev = adapter->netdev;
 677         u16 phy_data = 0;
 678
 679         spin_lock(&adapter->lock);
 680         adapter->phy_timer_pending = false;
 681         atl1_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 682         atl1_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 683         spin_unlock(&adapter->lock);
 684
 685         /* notify upper layer link down ASAP */
 686         if (!(phy_data & BMSR_LSTATUS)) {       /* Link Down */
 687                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 688                         printk(KERN_INFO "%s: %s link is down\n",
 689                                atl1_driver_name, netdev->name);
 690                         adapter->link_speed = SPEED_0;
 691                         netif_carrier_off(netdev);
 692                         netif_stop_queue(netdev);
 693                 }
 694         }
 695         schedule_work(&adapter->link_chg_task);
 696 }
 697
 698 /*
 699  * atl1_intr - Interrupt Handler
 700  * @irq: interrupt number
 701  * @data: pointer to a network interface device structure
 702  * @pt_regs: CPU registers structure
 703  */
 704 static irqreturn_t atl1_intr(int irq, void *data)
 705 {
 706         /*struct atl1_adapter *adapter = ((struct net_device *)data)->priv;*/
 707         struct atl1_adapter *adapter = netdev_priv(data);
 708         u32 status;
 709         u8 update_rx;
 710         int max_ints = 10;
 711
 712         status = adapter->cmb.cmb->int_stats;
 713         if (!status)
 714                 return IRQ_NONE;
 715
 716         update_rx = 0;
 717
 718         do {
 719                 /* clear CMB interrupt status at once */
 720                 adapter->cmb.cmb->int_stats = 0;
 721
 722                 if (status & ISR_GPHY)  /* clear phy status */
 723                         atl1_clear_phy_int(adapter);
 724
 725                 /* clear ISR status, and Enable CMB DMA/Disable Interrupt */
 726                 iowrite32(status | ISR_DIS_INT, adapter->hw.hw_addr + REG_ISR);
 727
 728                 /* check if SMB intr */
 729                 if (status & ISR_SMB)
 730                         atl1_inc_smb(adapter);
 731
 732                 /* check if PCIE PHY Link down */
 733                 if (status & ISR_PHY_LINKDOWN) {
 734                         printk(KERN_DEBUG "%s: pcie phy link down %x\n",
 735                                 atl1_driver_name, status);
 736                         if (netif_running(adapter->netdev)) {   /* reset MAC */
 737                                 iowrite32(0, adapter->hw.hw_addr + REG_IMR);
 738                                 schedule_work(&adapter->pcie_dma_to_rst_task);
 739                                 return IRQ_HANDLED;
 740                         }
 741                 }
 742
 743                 /* check if DMA read/write error ? */
 744                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
 745                         printk(KERN_DEBUG
 746                                 "%s: pcie DMA r/w error (status = 0x%x)\n",
 747                                 atl1_driver_name, status);
 748                         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
 749                         schedule_work(&adapter->pcie_dma_to_rst_task);
 750                         return IRQ_HANDLED;
 751                 }
 752
 753                 /* link event */
 754                 if (status & ISR_GPHY) {
 755                         adapter->soft_stats.tx_carrier_errors++;
 756                         atl1_check_for_link(adapter);
 757                 }
 758
 759                 /* transmit event */
 760                 if (status & ISR_CMB_TX)
 761                         atl1_intr_tx(adapter);
 762
 763                 /* rx exception */
 764                 if (unlikely(status & (ISR_RXF_OV | ISR_RFD_UNRUN |
 765                                 ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
 766                                 ISR_HOST_RRD_OV | ISR_CMB_RX))) {
 767                         if (status &
 768                             (ISR_RXF_OV | ISR_RFD_UNRUN | ISR_RRD_OV |
 769                              ISR_HOST_RFD_UNRUN | ISR_HOST_RRD_OV))
 770                                 printk(KERN_INFO
 771                                         "%s: rx exception: status = 0x%x\n",
 772                                         atl1_driver_name, status);
 773                         atl1_intr_rx(adapter);
 774                 }
 775
 776                 if (--max_ints < 0)
 777                         break;
 778
 779         } while ((status = adapter->cmb.cmb->int_stats));
 780
 781         /* re-enable Interrupt */
 782         iowrite32(ISR_DIS_SMB | ISR_DIS_DMA, adapter->hw.hw_addr + REG_ISR);
 783         return IRQ_HANDLED;
 784 }
 785
 786 /*
 787  * atl1_set_multi - Multicast and Promiscuous mode set
 788  * @netdev: network interface device structure
 789  *
 790  * The set_multi entry point is called whenever the multicast address
 791  * list or the network interface flags are updated.  This routine is
 792  * responsible for configuring the hardware for proper multicast,
 793  * promiscuous mode, and all-multi behavior.
 794  */
 795 static void atl1_set_multi(struct net_device *netdev)
 796 {
 797         struct atl1_adapter *adapter = netdev_priv(netdev);
 798         struct atl1_hw *hw = &adapter->hw;
 799         struct dev_mc_list *mc_ptr;
 800         u32 rctl;
 801         u32 hash_value;
 802
 803         /* Check for Promiscuous and All Multicast modes */
 804         rctl = ioread32(hw->hw_addr + REG_MAC_CTRL);
 805         if (netdev->flags & IFF_PROMISC)
 806                 rctl |= MAC_CTRL_PROMIS_EN;
 807         else if (netdev->flags & IFF_ALLMULTI) {
 808                 rctl |= MAC_CTRL_MC_ALL_EN;
 809                 rctl &= ~MAC_CTRL_PROMIS_EN;
 810         } else
 811                 rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 812
 813         iowrite32(rctl, hw->hw_addr + REG_MAC_CTRL);
 814
 815         /* clear the old settings from the multicast hash table */
 816         iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
 817         iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
 818
 819         /* compute mc addresses' hash value ,and put it into hash table */
 820         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 821                 hash_value = atl1_hash_mc_addr(hw, mc_ptr->dmi_addr);
 822                 atl1_hash_set(hw, hash_value);
 823         }
 824 }
 825
 826 static void atl1_setup_mac_ctrl(struct atl1_adapter *adapter)
 827 {
 828         u32 value;
 829         struct atl1_hw *hw = &adapter->hw;
 830         struct net_device *netdev = adapter->netdev;
 831         /* Config MAC CTRL Register */
 832         value = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
 833         /* duplex */
 834         if (FULL_DUPLEX == adapter->link_duplex)
 835                 value |= MAC_CTRL_DUPLX;
 836         /* speed */
 837         value |= ((u32) ((SPEED_1000 == adapter->link_speed) ?
 838                          MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
 839                   MAC_CTRL_SPEED_SHIFT);
 840         /* flow control */
 841         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
 842         /* PAD & CRC */
 843         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
 844         /* preamble length */
 845         value |= (((u32) adapter->hw.preamble_len
 846                    & MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
 847         /* vlan */
 848         if (adapter->vlgrp)
 849                 value |= MAC_CTRL_RMV_VLAN;
 850         /* rx checksum
 851            if (adapter->rx_csum)
 852            value |= MAC_CTRL_RX_CHKSUM_EN;
 853          */
 854         /* filter mode */
 855         value |= MAC_CTRL_BC_EN;
 856         if (netdev->flags & IFF_PROMISC)
 857                 value |= MAC_CTRL_PROMIS_EN;
 858         else if (netdev->flags & IFF_ALLMULTI)
 859                 value |= MAC_CTRL_MC_ALL_EN;
 860         /* value |= MAC_CTRL_LOOPBACK; */
 861         iowrite32(value, hw->hw_addr + REG_MAC_CTRL);
 862 }
 863
 864 static u32 atl1_check_link(struct atl1_adapter *adapter)
 865 {
 866         struct atl1_hw *hw = &adapter->hw;
 867         struct net_device *netdev = adapter->netdev;
 868         u32 ret_val;
 869         u16 speed, duplex, phy_data;
 870         int reconfig = 0;
 871
 872         /* MII_BMSR must read twice */
 873         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
 874         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
 875         if (!(phy_data & BMSR_LSTATUS)) {       /* link down */
 876                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 877                         printk(KERN_INFO "%s: link is down\n",
 878                                 atl1_driver_name);
 879                         adapter->link_speed = SPEED_0;
 880                         netif_carrier_off(netdev);
 881                         netif_stop_queue(netdev);
 882                 }
 883                 return ATL1_SUCCESS;
 884         }
 885
 886         /* Link Up */
 887         ret_val = atl1_get_speed_and_duplex(hw, &speed, &duplex);
 888         if (ret_val)
 889                 return ret_val;
 890
 891         switch (hw->media_type) {
 892         case MEDIA_TYPE_1000M_FULL:
 893                 if (speed != SPEED_1000 || duplex != FULL_DUPLEX)
 894                         reconfig = 1;
 895                 break;
 896         case MEDIA_TYPE_100M_FULL:
 897                 if (speed != SPEED_100 || duplex != FULL_DUPLEX)
 898                         reconfig = 1;
 899                 break;
 900         case MEDIA_TYPE_100M_HALF:
 901                 if (speed != SPEED_100 || duplex != HALF_DUPLEX)
 902                         reconfig = 1;
 903                 break;
 904         case MEDIA_TYPE_10M_FULL:
 905                 if (speed != SPEED_10 || duplex != FULL_DUPLEX)
 906                         reconfig = 1;
 907                 break;
 908         case MEDIA_TYPE_10M_HALF:
 909                 if (speed != SPEED_10 || duplex != HALF_DUPLEX)
 910                         reconfig = 1;
 911                 break;
 912         }
 913
 914         /* link result is our setting */
 915         if (!reconfig) {
 916                 if (adapter->link_speed != speed
 917                     || adapter->link_duplex != duplex) {
 918                         adapter->link_speed = speed;
 919                         adapter->link_duplex = duplex;
 920                         atl1_setup_mac_ctrl(adapter);
 921                         printk(KERN_INFO "%s: %s link is up %d Mbps %s\n",
 922                                atl1_driver_name, netdev->name,
 923                                adapter->link_speed,
 924                                adapter->link_duplex ==
 925                                FULL_DUPLEX ? "full duplex" : "half duplex");
 926                 }
 927                 if (!netif_carrier_ok(netdev)) {        /* Link down -> Up */
 928                         netif_carrier_on(netdev);
 929                         netif_wake_queue(netdev);
 930                 }
 931                 return ATL1_SUCCESS;
 932         }
 933
 934         /* change orignal link status */
 935         if (netif_carrier_ok(netdev)) {
 936                 adapter->link_speed = SPEED_0;
 937                 netif_carrier_off(netdev);
 938                 netif_stop_queue(netdev);
 939         }
 940
 941         if (hw->media_type != MEDIA_TYPE_AUTO_SENSOR &&
 942             hw->media_type != MEDIA_TYPE_1000M_FULL) {
 943                 switch (hw->media_type) {
 944                 case MEDIA_TYPE_100M_FULL:
 945                         phy_data = MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
 946                                    MII_CR_RESET;
 947                         break;
 948                 case MEDIA_TYPE_100M_HALF:
 949                         phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
 950                         break;
 951                 case MEDIA_TYPE_10M_FULL:
 952                         phy_data =
 953                             MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
 954                         break;
 955                 default:        /* MEDIA_TYPE_10M_HALF: */
 956                         phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
 957                         break;
 958                 }
 959                 atl1_write_phy_reg(hw, MII_BMCR, phy_data);
 960                 return ATL1_SUCCESS;
 961         }
 962
 963         /* auto-neg, insert timer to re-config phy */
 964         if (!adapter->phy_timer_pending) {
 965                 adapter->phy_timer_pending = true;
 966                 mod_timer(&adapter->phy_config_timer, jiffies + 3 * HZ);
 967         }
 968
 969         return ATL1_SUCCESS;
 970 }
 971
 972 static void set_flow_ctrl_old(struct atl1_adapter *adapter)
 973 {
 974         u32 hi, lo, value;
 975
 976         /* RFD Flow Control */
 977         value = adapter->rfd_ring.count;
 978         hi = value / 16;
 979         if (hi < 2)
 980                 hi = 2;
 981         lo = value * 7 / 8;
 982
 983         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 984             ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 985         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
 986
 987         /* RRD Flow Control */
 988         value = adapter->rrd_ring.count;
 989         lo = value / 16;
 990         hi = value * 7 / 8;
 991         if (lo < 2)
 992                 lo = 2;
 993         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
 994             ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
 995         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
 996 }
 997
 998 static void set_flow_ctrl_new(struct atl1_hw *hw)
 999 {
1000         u32 hi, lo, value;
1001
1002         /* RXF Flow Control */
1003         value = ioread32(hw->hw_addr + REG_SRAM_RXF_LEN);
1004         lo = value / 16;
1005         if (lo < 192)
1006                 lo = 192;
1007         hi = value * 7 / 8;
1008         if (hi < lo)
1009                 hi = lo + 16;
1010         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1011             ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1012         iowrite32(value, hw->hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
1013
1014         /* RRD Flow Control */
1015         value = ioread32(hw->hw_addr + REG_SRAM_RRD_LEN);
1016         lo = value / 8;
1017         hi = value * 7 / 8;
1018         if (lo < 2)
1019                 lo = 2;
1020         if (hi < lo)
1021                 hi = lo + 3;
1022         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
1023             ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
1024         iowrite32(value, hw->hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
1025 }
1026
1027 /*
1028  * atl1_configure - Configure Transmit&Receive Unit after Reset
1029  * @adapter: board private structure
1030  *
1031  * Configure the Tx /Rx unit of the MAC after a reset.
1032  */
1033 static u32 atl1_configure(struct atl1_adapter *adapter)
1034 {
1035         struct atl1_hw *hw = &adapter->hw;
1036         u32 value;
1037
1038         /* clear interrupt status */
1039         iowrite32(0xffffffff, adapter->hw.hw_addr + REG_ISR);
1040
1041         /* set MAC Address */
1042         value = (((u32) hw->mac_addr[2]) << 24) |
1043                 (((u32) hw->mac_addr[3]) << 16) |
1044                 (((u32) hw->mac_addr[4]) << 8) |
1045                 (((u32) hw->mac_addr[5]));
1046         iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
1047         value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
1048         iowrite32(value, hw->hw_addr + (REG_MAC_STA_ADDR + 4));
1049
1050         /* tx / rx ring */
1051
1052         /* HI base address */
1053         iowrite32((u32) ((adapter->tpd_ring.dma & 0xffffffff00000000ULL) >> 32),
1054                 hw->hw_addr + REG_DESC_BASE_ADDR_HI);
1055         /* LO base address */
1056         iowrite32((u32) (adapter->rfd_ring.dma & 0x00000000ffffffffULL),
1057                 hw->hw_addr + REG_DESC_RFD_ADDR_LO);
1058         iowrite32((u32) (adapter->rrd_ring.dma & 0x00000000ffffffffULL),
1059                 hw->hw_addr + REG_DESC_RRD_ADDR_LO);
1060         iowrite32((u32) (adapter->tpd_ring.dma & 0x00000000ffffffffULL),
1061                 hw->hw_addr + REG_DESC_TPD_ADDR_LO);
1062         iowrite32((u32) (adapter->cmb.dma & 0x00000000ffffffffULL),
1063                 hw->hw_addr + REG_DESC_CMB_ADDR_LO);
1064         iowrite32((u32) (adapter->smb.dma & 0x00000000ffffffffULL),
1065                 hw->hw_addr + REG_DESC_SMB_ADDR_LO);
1066
1067         /* element count */
1068         value = adapter->rrd_ring.count;
1069         value <<= 16;
1070         value += adapter->rfd_ring.count;
1071         iowrite32(value, hw->hw_addr + REG_DESC_RFD_RRD_RING_SIZE);
1072         iowrite32(adapter->tpd_ring.count, hw->hw_addr + REG_DESC_TPD_RING_SIZE);
1073
1074         /* Load Ptr */
1075         iowrite32(1, hw->hw_addr + REG_LOAD_PTR);
1076
1077         /* config Mailbox */
1078         value = ((atomic_read(&adapter->tpd_ring.next_to_use)
1079                   & MB_TPD_PROD_INDX_MASK) << MB_TPD_PROD_INDX_SHIFT) |
1080             ((atomic_read(&adapter->rrd_ring.next_to_clean)
1081               & MB_RRD_CONS_INDX_MASK) << MB_RRD_CONS_INDX_SHIFT) |
1082             ((atomic_read(&adapter->rfd_ring.next_to_use)
1083               & MB_RFD_PROD_INDX_MASK) << MB_RFD_PROD_INDX_SHIFT);
1084         iowrite32(value, hw->hw_addr + REG_MAILBOX);
1085
1086         /* config IPG/IFG */
1087         value = (((u32) hw->ipgt & MAC_IPG_IFG_IPGT_MASK)
1088                  << MAC_IPG_IFG_IPGT_SHIFT) |
1089             (((u32) hw->min_ifg & MAC_IPG_IFG_MIFG_MASK)
1090              << MAC_IPG_IFG_MIFG_SHIFT) |
1091             (((u32) hw->ipgr1 & MAC_IPG_IFG_IPGR1_MASK)
1092              << MAC_IPG_IFG_IPGR1_SHIFT) |
1093             (((u32) hw->ipgr2 & MAC_IPG_IFG_IPGR2_MASK)
1094              << MAC_IPG_IFG_IPGR2_SHIFT);
1095         iowrite32(value, hw->hw_addr + REG_MAC_IPG_IFG);
1096
1097         /* config  Half-Duplex Control */
1098         value = ((u32) hw->lcol & MAC_HALF_DUPLX_CTRL_LCOL_MASK) |
1099             (((u32) hw->max_retry & MAC_HALF_DUPLX_CTRL_RETRY_MASK)
1100              << MAC_HALF_DUPLX_CTRL_RETRY_SHIFT) |
1101             MAC_HALF_DUPLX_CTRL_EXC_DEF_EN |
1102             (0xa << MAC_HALF_DUPLX_CTRL_ABEBT_SHIFT) |
1103             (((u32) hw->jam_ipg & MAC_HALF_DUPLX_CTRL_JAMIPG_MASK)
1104              << MAC_HALF_DUPLX_CTRL_JAMIPG_SHIFT);
1105         iowrite32(value, hw->hw_addr + REG_MAC_HALF_DUPLX_CTRL);
1106
1107         /* set Interrupt Moderator Timer */
1108         iowrite16(adapter->imt, hw->hw_addr + REG_IRQ_MODU_TIMER_INIT);
1109         iowrite32(MASTER_CTRL_ITIMER_EN, hw->hw_addr + REG_MASTER_CTRL);
1110
1111         /* set Interrupt Clear Timer */
1112         iowrite16(adapter->ict, hw->hw_addr + REG_CMBDISDMA_TIMER);
1113
1114         /* set MTU, 4 : VLAN */
1115         iowrite32(hw->max_frame_size + 4, hw->hw_addr + REG_MTU);
1116
1117         /* jumbo size & rrd retirement timer */
1118         value = (((u32) hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK)
1119                  << RXQ_JMBOSZ_TH_SHIFT) |
1120             (((u32) hw->rx_jumbo_lkah & RXQ_JMBO_LKAH_MASK)
1121              << RXQ_JMBO_LKAH_SHIFT) |
1122             (((u32) hw->rrd_ret_timer & RXQ_RRD_TIMER_MASK)
1123              << RXQ_RRD_TIMER_SHIFT);
1124         iowrite32(value, hw->hw_addr + REG_RXQ_JMBOSZ_RRDTIM);
1125
1126         /* Flow Control */
1127         switch (hw->dev_rev) {
1128         case 0x8001:
1129         case 0x9001:
1130         case 0x9002:
1131         case 0x9003:
1132                 set_flow_ctrl_old(adapter);
1133                 break;
1134         default:
1135                 set_flow_ctrl_new(hw);
1136                 break;
1137         }
1138
1139         /* config TXQ */
1140         value = (((u32) hw->tpd_burst & TXQ_CTRL_TPD_BURST_NUM_MASK)
1141                  << TXQ_CTRL_TPD_BURST_NUM_SHIFT) |
1142             (((u32) hw->txf_burst & TXQ_CTRL_TXF_BURST_NUM_MASK)
1143              << TXQ_CTRL_TXF_BURST_NUM_SHIFT) |
1144             (((u32) hw->tpd_fetch_th & TXQ_CTRL_TPD_FETCH_TH_MASK)
1145              << TXQ_CTRL_TPD_FETCH_TH_SHIFT) | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN;
1146         iowrite32(value, hw->hw_addr + REG_TXQ_CTRL);
1147
1148         /* min tpd fetch gap & tx jumbo packet size threshold for taskoffload */
1149         value = (((u32) hw->tx_jumbo_task_th & TX_JUMBO_TASK_TH_MASK)
1150                  << TX_JUMBO_TASK_TH_SHIFT) |
1151             (((u32) hw->tpd_fetch_gap & TX_TPD_MIN_IPG_MASK)
1152              << TX_TPD_MIN_IPG_SHIFT);
1153         iowrite32(value, hw->hw_addr + REG_TX_JUMBO_TASK_TH_TPD_IPG);
1154
1155         /* config RXQ */
1156         value = (((u32) hw->rfd_burst & RXQ_CTRL_RFD_BURST_NUM_MASK)
1157                  << RXQ_CTRL_RFD_BURST_NUM_SHIFT) |
1158             (((u32) hw->rrd_burst & RXQ_CTRL_RRD_BURST_THRESH_MASK)
1159              << RXQ_CTRL_RRD_BURST_THRESH_SHIFT) |
1160             (((u32) hw->rfd_fetch_gap & RXQ_CTRL_RFD_PREF_MIN_IPG_MASK)
1161              << RXQ_CTRL_RFD_PREF_MIN_IPG_SHIFT) |
1162             RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1163         iowrite32(value, hw->hw_addr + REG_RXQ_CTRL);
1164
1165         /* config DMA Engine */
1166         value = ((((u32) hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1167                  << DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
1168             ((((u32) hw->dmaw_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1169              << DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
1170             DMA_CTRL_DMAR_EN | DMA_CTRL_DMAW_EN;
1171         value |= (u32) hw->dma_ord;
1172         if (atl1_rcb_128 == hw->rcb_value)
1173                 value |= DMA_CTRL_RCB_VALUE;
1174         iowrite32(value, hw->hw_addr + REG_DMA_CTRL);
1175
1176         /* config CMB / SMB */
1177         value = hw->cmb_rrd | ((u32) hw->cmb_tpd << 16);
1178         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TH);
1179         value = hw->cmb_rx_timer | ((u32) hw->cmb_tx_timer << 16);
1180         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TIMER);
1181         iowrite32(hw->smb_timer, hw->hw_addr + REG_SMB_TIMER);
1182
1183         /* --- enable CMB / SMB */
1184         value = CSMB_CTRL_CMB_EN | CSMB_CTRL_SMB_EN;
1185         iowrite32(value, hw->hw_addr + REG_CSMB_CTRL);
1186
1187         value = ioread32(adapter->hw.hw_addr + REG_ISR);
1188         if (unlikely((value & ISR_PHY_LINKDOWN) != 0))
1189                 value = 1;      /* config failed */
1190         else
1191                 value = 0;
1192
1193         /* clear all interrupt status */
1194         iowrite32(0x3fffffff, adapter->hw.hw_addr + REG_ISR);
1195         iowrite32(0, adapter->hw.hw_addr + REG_ISR);
1196         return value;
1197 }
1198
1199 /*
1200  * atl1_irq_disable - Mask off interrupt generation on the NIC
1201  * @adapter: board private structure
1202  */
1203 static void atl1_irq_disable(struct atl1_adapter *adapter)
1204 {
1205         atomic_inc(&adapter->irq_sem);
1206         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
1207         ioread32(adapter->hw.hw_addr + REG_IMR);
1208         synchronize_irq(adapter->pdev->irq);
1209 }
1210
1211 static void atl1_vlan_rx_register(struct net_device *netdev,
1212                                 struct vlan_group *grp)
1213 {
1214         struct atl1_adapter *adapter = netdev_priv(netdev);
1215         unsigned long flags;
1216         u32 ctrl;
1217
1218         spin_lock_irqsave(&adapter->lock, flags);
1219         /* atl1_irq_disable(adapter); */
1220         adapter->vlgrp = grp;
1221
1222         if (grp) {
1223                 /* enable VLAN tag insert/strip */
1224                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
1225                 ctrl |= MAC_CTRL_RMV_VLAN;
1226                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
1227         } else {
1228                 /* disable VLAN tag insert/strip */
1229                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
1230                 ctrl &= ~MAC_CTRL_RMV_VLAN;
1231                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
1232         }
1233
1234         /* atl1_irq_enable(adapter); */
1235         spin_unlock_irqrestore(&adapter->lock, flags);
1236 }
1237
1238 /* FIXME: justify or remove -- CHS */
1239 static void atl1_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1240 {
1241         /* We don't do Vlan filtering */
1242         return;
1243 }
1244
1245 /* FIXME: this looks wrong too -- CHS */
1246 static void atl1_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1247 {
1248         struct atl1_adapter *adapter = netdev_priv(netdev);
1249         unsigned long flags;
1250
1251         spin_lock_irqsave(&adapter->lock, flags);
1252         /* atl1_irq_disable(adapter); */
1253         vlan_group_set_device(adapter->vlgrp, vid, NULL);
1254         /* atl1_irq_enable(adapter); */
1255         spin_unlock_irqrestore(&adapter->lock, flags);
1256         /* We don't do Vlan filtering */
1257         return;
1258 }
1259
1260 static void atl1_restore_vlan(struct atl1_adapter *adapter)
1261 {
1262         atl1_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1263         if (adapter->vlgrp) {
1264                 u16 vid;
1265                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1266                         if (!vlan_group_get_device(adapter->vlgrp, vid))
1267                                 continue;
1268                         atl1_vlan_rx_add_vid(adapter->netdev, vid);
1269                 }
1270         }
1271 }
1272
1273 static u16 tpd_avail(struct atl1_tpd_ring *tpd_ring)
1274 {
1275         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1276         u16 next_to_use = atomic_read(&tpd_ring->next_to_use);
1277         return ((next_to_clean >
1278                  next_to_use) ? next_to_clean - next_to_use -
1279                 1 : tpd_ring->count + next_to_clean - next_to_use - 1);
1280 }
1281
1282 static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
1283                          struct tso_param *tso)
1284 {
1285         /* We enter this function holding a spinlock. */
1286         u8 ipofst;
1287         int err;
1288
1289         if (skb_shinfo(skb)->gso_size) {
1290                 if (skb_header_cloned(skb)) {
1291                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1292                         if (unlikely(err))
1293                                 return err;
1294                 }
1295
1296                 if (skb->protocol == ntohs(ETH_P_IP)) {
1297                         struct iphdr *iph = ip_hdr(skb);
1298
1299                         iph->tot_len = 0;
1300                         iph->check = 0;
1301                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1302                                                                  iph->daddr, 0,
1303                                                                  IPPROTO_TCP,
1304                                                                  0);
1305                         ipofst = skb_network_offset(skb);
1306                         if (ipofst != ENET_HEADER_SIZE) /* 802.3 frame */
1307                                 tso->tsopl |= 1 << TSO_PARAM_ETHTYPE_SHIFT;
1308
1309                         tso->tsopl |= (iph->ihl &
1310                                 CSUM_PARAM_IPHL_MASK) << CSUM_PARAM_IPHL_SHIFT;
1311                         tso->tsopl |= (tcp_hdrlen(skb) &
1312                                 TSO_PARAM_TCPHDRLEN_MASK) << TSO_PARAM_TCPHDRLEN_SHIFT;
1313                         tso->tsopl |= (skb_shinfo(skb)->gso_size &
1314                                 TSO_PARAM_MSS_MASK) << TSO_PARAM_MSS_SHIFT;
1315                         tso->tsopl |= 1 << TSO_PARAM_IPCKSUM_SHIFT;
1316                         tso->tsopl |= 1 << TSO_PARAM_TCPCKSUM_SHIFT;
1317                         tso->tsopl |= 1 << TSO_PARAM_SEGMENT_SHIFT;
1318                         return true;
1319                 }
1320         }
1321         return false;
1322 }
1323
1324 static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
1325                         struct csum_param *csum)
1326 {
1327         u8 css, cso;
1328
1329         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1330                 cso = skb_transport_offset(skb);
1331                 css = cso + skb->csum_offset;
1332                 if (unlikely(cso & 0x1)) {
1333                         printk(KERN_DEBUG "%s: payload offset != even number\n",
1334                                 atl1_driver_name);
1335                         return -1;
1336                 }
1337                 csum->csumpl |= (cso & CSUM_PARAM_PLOADOFFSET_MASK) <<
1338                         CSUM_PARAM_PLOADOFFSET_SHIFT;
1339                 csum->csumpl |= (css & CSUM_PARAM_XSUMOFFSET_MASK) <<
1340                         CSUM_PARAM_XSUMOFFSET_SHIFT;
1341                 csum->csumpl |= 1 << CSUM_PARAM_CUSTOMCKSUM_SHIFT;
1342                 return true;
1343         }
1344
1345         return true;
1346 }
1347
1348 static void atl1_tx_map(struct atl1_adapter *adapter,
1349                                 struct sk_buff *skb, bool tcp_seg)
1350 {
1351         /* We enter this function holding a spinlock. */
1352         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1353         struct atl1_buffer *buffer_info;
1354         struct page *page;
1355         int first_buf_len = skb->len;
1356         unsigned long offset;
1357         unsigned int nr_frags;
1358         unsigned int f;
1359         u16 tpd_next_to_use;
1360         u16 proto_hdr_len;
1361         u16 i, m, len12;
1362
1363         first_buf_len -= skb->data_len;
1364         nr_frags = skb_shinfo(skb)->nr_frags;
1365         tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
1366         buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1367         if (unlikely(buffer_info->skb))
1368                 BUG();
1369         buffer_info->skb = NULL;        /* put skb in last TPD */
1370
1371         if (tcp_seg) {
1372                 /* TSO/GSO */
1373                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1374                 buffer_info->length = proto_hdr_len;
1375                 page = virt_to_page(skb->data);
1376                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1377                 buffer_info->dma = pci_map_page(adapter->pdev, page,
1378                                                 offset, proto_hdr_len,
1379                                                 PCI_DMA_TODEVICE);
1380
1381                 if (++tpd_next_to_use == tpd_ring->count)
1382                         tpd_next_to_use = 0;
1383
1384                 if (first_buf_len > proto_hdr_len) {
1385                         len12 = first_buf_len - proto_hdr_len;
1386                         m = (len12 + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1387                         for (i = 0; i < m; i++) {
1388                                 buffer_info =
1389                                     &tpd_ring->buffer_info[tpd_next_to_use];
1390                                 buffer_info->skb = NULL;
1391                                 buffer_info->length =
1392                                     (MAX_TX_BUF_LEN >=
1393                                      len12) ? MAX_TX_BUF_LEN : len12;
1394                                 len12 -= buffer_info->length;
1395                                 page = virt_to_page(skb->data +
1396                                                  (proto_hdr_len +
1397                                                   i * MAX_TX_BUF_LEN));
1398                                 offset = (unsigned long)(skb->data +
1399                                                         (proto_hdr_len +
1400                                                         i * MAX_TX_BUF_LEN)) &
1401                                                         ~PAGE_MASK;
1402                                 buffer_info->dma =
1403                                     pci_map_page(adapter->pdev, page, offset,
1404                                                  buffer_info->length,
1405                                                  PCI_DMA_TODEVICE);
1406                                 if (++tpd_next_to_use == tpd_ring->count)
1407                                         tpd_next_to_use = 0;
1408                         }
1409                 }
1410         } else {
1411                 /* not TSO/GSO */
1412                 buffer_info->length = first_buf_len;
1413                 page = virt_to_page(skb->data);
1414                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1415                 buffer_info->dma = pci_map_page(adapter->pdev, page,
1416                                                 offset, first_buf_len,
1417                                                 PCI_DMA_TODEVICE);
1418                 if (++tpd_next_to_use == tpd_ring->count)
1419                         tpd_next_to_use = 0;
1420         }
1421
1422         for (f = 0; f < nr_frags; f++) {
1423                 struct skb_frag_struct *frag;
1424                 u16 lenf, i, m;
1425
1426                 frag = &skb_shinfo(skb)->frags[f];
1427                 lenf = frag->size;
1428
1429                 m = (lenf + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1430                 for (i = 0; i < m; i++) {
1431                         buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1432                         if (unlikely(buffer_info->skb))
1433                                 BUG();
1434                         buffer_info->skb = NULL;
1435                         buffer_info->length =
1436                             (lenf > MAX_TX_BUF_LEN) ? MAX_TX_BUF_LEN : lenf;
1437                         lenf -= buffer_info->length;
1438                         buffer_info->dma =
1439                             pci_map_page(adapter->pdev, frag->page,
1440                                          frag->page_offset + i * MAX_TX_BUF_LEN,
1441                                          buffer_info->length, PCI_DMA_TODEVICE);
1442
1443                         if (++tpd_next_to_use == tpd_ring->count)
1444                                 tpd_next_to_use = 0;
1445                 }
1446         }
1447
1448         /* last tpd's buffer-info */
1449         buffer_info->skb = skb;
1450 }
1451
1452 static void atl1_tx_queue(struct atl1_adapter *adapter, int count,
1453                                union tpd_descr *descr)
1454 {
1455         /* We enter this function holding a spinlock. */
1456         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1457         int j;
1458         u32 val;
1459         struct atl1_buffer *buffer_info;
1460         struct tx_packet_desc *tpd;
1461         u16 tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
1462
1463         for (j = 0; j < count; j++) {
1464                 buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1465                 tpd = ATL1_TPD_DESC(&adapter->tpd_ring, tpd_next_to_use);
1466                 tpd->desc.csum.csumpu = descr->csum.csumpu;
1467                 tpd->desc.csum.csumpl = descr->csum.csumpl;
1468                 tpd->desc.tso.tsopu = descr->tso.tsopu;
1469                 tpd->desc.tso.tsopl = descr->tso.tsopl;
1470                 tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1471                 tpd->desc.data = descr->data;
1472                 tpd->desc.csum.csumpu |= (cpu_to_le16(buffer_info->length) &
1473                         CSUM_PARAM_BUFLEN_MASK) << CSUM_PARAM_BUFLEN_SHIFT;
1474
1475                 val = (descr->tso.tsopl >> TSO_PARAM_SEGMENT_SHIFT) &
1476                         TSO_PARAM_SEGMENT_MASK;
1477                 if (val && !j)
1478                         tpd->desc.tso.tsopl |= 1 << TSO_PARAM_HDRFLAG_SHIFT;
1479
1480                 if (j == (count - 1))
1481                         tpd->desc.csum.csumpl |= 1 << CSUM_PARAM_EOP_SHIFT;
1482
1483                 if (++tpd_next_to_use == tpd_ring->count)
1484                         tpd_next_to_use = 0;
1485         }
1486         /*
1487          * Force memory writes to complete before letting h/w
1488          * know there are new descriptors to fetch.  (Only
1489          * applicable for weak-ordered memory model archs,
1490          * such as IA-64).
1491          */
1492         wmb();
1493
1494         atomic_set(&tpd_ring->next_to_use, (int)tpd_next_to_use);
1495 }
1496
1497 static void atl1_update_mailbox(struct atl1_adapter *adapter)
1498 {
1499         unsigned long flags;
1500         u32 tpd_next_to_use;
1501         u32 rfd_next_to_use;
1502         u32 rrd_next_to_clean;
1503         u32 value;
1504
1505         spin_lock_irqsave(&adapter->mb_lock, flags);
1506
1507         tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
1508         rfd_next_to_use = atomic_read(&adapter->rfd_ring.next_to_use);
1509         rrd_next_to_clean = atomic_read(&adapter->rrd_ring.next_to_clean);
1510
1511         value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
1512                 MB_RFD_PROD_INDX_SHIFT) |
1513                 ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
1514                 MB_RRD_CONS_INDX_SHIFT) |
1515                 ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
1516                 MB_TPD_PROD_INDX_SHIFT);
1517         iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
1518
1519         spin_unlock_irqrestore(&adapter->mb_lock, flags);
1520 }
1521
1522 static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1523 {
1524         struct atl1_adapter *adapter = netdev_priv(netdev);
1525         int len = skb->len;
1526         int tso;
1527         int count = 1;
1528         int ret_val;
1529         u32 val;
1530         union tpd_descr param;
1531         u16 frag_size;
1532         u16 vlan_tag;
1533         unsigned long flags;
1534         unsigned int nr_frags = 0;
1535         unsigned int mss = 0;
1536         unsigned int f;
1537         unsigned int proto_hdr_len;
1538
1539         len -= skb->data_len;
1540
1541         if (unlikely(skb->len == 0)) {
1542                 dev_kfree_skb_any(skb);
1543                 return NETDEV_TX_OK;
1544         }
1545
1546         param.data = 0;
1547         param.tso.tsopu = 0;
1548         param.tso.tsopl = 0;
1549         param.csum.csumpu = 0;
1550         param.csum.csumpl = 0;
1551
1552         /* nr_frags will be nonzero if we're doing scatter/gather (SG) */
1553         nr_frags = skb_shinfo(skb)->nr_frags;
1554         for (f = 0; f < nr_frags; f++) {
1555                 frag_size = skb_shinfo(skb)->frags[f].size;
1556                 if (frag_size)
1557                         count +=
1558                             (frag_size + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1559         }
1560
1561         /* mss will be nonzero if we're doing segment offload (TSO/GSO) */
1562         mss = skb_shinfo(skb)->gso_size;
1563         if (mss) {
1564                 if (skb->protocol == htons(ETH_P_IP)) {
1565                         proto_hdr_len = (skb_transport_offset(skb) +
1566                                          tcp_hdrlen(skb));
1567                         if (unlikely(proto_hdr_len > len)) {
1568                                 dev_kfree_skb_any(skb);
1569                                 return NETDEV_TX_OK;
1570                         }
1571                         /* need additional TPD ? */
1572                         if (proto_hdr_len != len)
1573                                 count += (len - proto_hdr_len +
1574                                         MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1575                 }
1576         }
1577
1578         local_irq_save(flags);
1579         if (!spin_trylock(&adapter->lock)) {
1580                 /* Can't get lock - tell upper layer to requeue */
1581                 local_irq_restore(flags);
1582                 printk(KERN_DEBUG "%s: TX locked\n", atl1_driver_name);
1583                 return NETDEV_TX_LOCKED;
1584         }
1585
1586         if (tpd_avail(&adapter->tpd_ring) < count) {
1587                 /* not enough descriptors */
1588                 netif_stop_queue(netdev);
1589                 spin_unlock_irqrestore(&adapter->lock, flags);
1590                 printk(KERN_DEBUG "%s: TX busy\n", atl1_driver_name);
1591                 return NETDEV_TX_BUSY;
1592         }
1593
1594         param.data = 0;
1595
1596         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1597                 vlan_tag = vlan_tx_tag_get(skb);
1598                 vlan_tag = (vlan_tag << 4) | (vlan_tag >> 13) |
1599                         ((vlan_tag >> 9) & 0x8);
1600                 param.csum.csumpl |= 1 << CSUM_PARAM_INSVLAG_SHIFT;
1601                 param.csum.csumpu |= (vlan_tag & CSUM_PARAM_VALANTAG_MASK) <<
1602                         CSUM_PARAM_VALAN_SHIFT;
1603         }
1604
1605         tso = atl1_tso(adapter, skb, &param.tso);
1606         if (tso < 0) {
1607                 spin_unlock_irqrestore(&adapter->lock, flags);
1608                 dev_kfree_skb_any(skb);
1609                 return NETDEV_TX_OK;
1610         }
1611
1612         if (!tso) {
1613                 ret_val = atl1_tx_csum(adapter, skb, &param.csum);
1614                 if (ret_val < 0) {
1615                         spin_unlock_irqrestore(&adapter->lock, flags);
1616                         dev_kfree_skb_any(skb);
1617                         return NETDEV_TX_OK;
1618                 }
1619         }
1620
1621         val = (param.csum.csumpl >> CSUM_PARAM_SEGMENT_SHIFT) &
1622                 CSUM_PARAM_SEGMENT_MASK;
1623         atl1_tx_map(adapter, skb, 1 == val);
1624         atl1_tx_queue(adapter, count, &param);
1625         netdev->trans_start = jiffies;
1626         spin_unlock_irqrestore(&adapter->lock, flags);
1627         atl1_update_mailbox(adapter);
1628         return NETDEV_TX_OK;
1629 }
1630
1631 /*
1632  * atl1_get_stats - Get System Network Statistics
1633  * @netdev: network interface device structure
1634  *
1635  * Returns the address of the device statistics structure.
1636  * The statistics are actually updated from the timer callback.
1637  */
1638 static struct net_device_stats *atl1_get_stats(struct net_device *netdev)
1639 {
1640         struct atl1_adapter *adapter = netdev_priv(netdev);
1641         return &adapter->net_stats;
1642 }
1643
1644 /*
1645  * atl1_clean_rx_ring - Free RFD Buffers
1646  * @adapter: board private structure
1647  */
1648 static void atl1_clean_rx_ring(struct atl1_adapter *adapter)
1649 {
1650         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1651         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1652         struct atl1_buffer *buffer_info;
1653         struct pci_dev *pdev = adapter->pdev;
1654         unsigned long size;
1655         unsigned int i;
1656
1657         /* Free all the Rx ring sk_buffs */
1658         for (i = 0; i < rfd_ring->count; i++) {
1659                 buffer_info = &rfd_ring->buffer_info[i];
1660                 if (buffer_info->dma) {
1661                         pci_unmap_page(pdev,
1662                                         buffer_info->dma,
1663                                         buffer_info->length,
1664                                         PCI_DMA_FROMDEVICE);
1665                         buffer_info->dma = 0;
1666                 }
1667                 if (buffer_info->skb) {
1668                         dev_kfree_skb(buffer_info->skb);
1669                         buffer_info->skb = NULL;
1670                 }
1671         }
1672
1673         size = sizeof(struct atl1_buffer) * rfd_ring->count;
1674         memset(rfd_ring->buffer_info, 0, size);
1675
1676         /* Zero out the descriptor ring */
1677         memset(rfd_ring->desc, 0, rfd_ring->size);
1678
1679         rfd_ring->next_to_clean = 0;
1680         atomic_set(&rfd_ring->next_to_use, 0);
1681
1682         rrd_ring->next_to_use = 0;
1683         atomic_set(&rrd_ring->next_to_clean, 0);
1684 }
1685
1686 /*
1687  * atl1_clean_tx_ring - Free Tx Buffers
1688  * @adapter: board private structure
1689  */
1690 static void atl1_clean_tx_ring(struct atl1_adapter *adapter)
1691 {
1692         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1693         struct atl1_buffer *buffer_info;
1694         struct pci_dev *pdev = adapter->pdev;
1695         unsigned long size;
1696         unsigned int i;
1697
1698         /* Free all the Tx ring sk_buffs */
1699         for (i = 0; i < tpd_ring->count; i++) {
1700                 buffer_info = &tpd_ring->buffer_info[i];
1701                 if (buffer_info->dma) {
1702                         pci_unmap_page(pdev, buffer_info->dma,
1703                                        buffer_info->length, PCI_DMA_TODEVICE);
1704                         buffer_info->dma = 0;
1705                 }
1706         }
1707
1708         for (i = 0; i < tpd_ring->count; i++) {
1709                 buffer_info = &tpd_ring->buffer_info[i];
1710                 if (buffer_info->skb) {
1711                         dev_kfree_skb_any(buffer_info->skb);
1712                         buffer_info->skb = NULL;
1713                 }
1714         }
1715
1716         size = sizeof(struct atl1_buffer) * tpd_ring->count;
1717         memset(tpd_ring->buffer_info, 0, size);
1718
1719         /* Zero out the descriptor ring */
1720         memset(tpd_ring->desc, 0, tpd_ring->size);
1721
1722         atomic_set(&tpd_ring->next_to_use, 0);
1723         atomic_set(&tpd_ring->next_to_clean, 0);
1724 }
1725
1726 /*
1727  * atl1_free_ring_resources - Free Tx / RX descriptor Resources
1728  * @adapter: board private structure
1729  *
1730  * Free all transmit software resources
1731  */
1732 void atl1_free_ring_resources(struct atl1_adapter *adapter)
1733 {
1734         struct pci_dev *pdev = adapter->pdev;
1735         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1736         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1737         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1738         struct atl1_ring_header *ring_header = &adapter->ring_header;
1739
1740         atl1_clean_tx_ring(adapter);
1741         atl1_clean_rx_ring(adapter);
1742
1743         kfree(tpd_ring->buffer_info);
1744         pci_free_consistent(pdev, ring_header->size, ring_header->desc,
1745                             ring_header->dma);
1746
1747         tpd_ring->buffer_info = NULL;
1748         tpd_ring->desc = NULL;
1749         tpd_ring->dma = 0;
1750
1751         rfd_ring->buffer_info = NULL;
1752         rfd_ring->desc = NULL;
1753         rfd_ring->dma = 0;
1754
1755         rrd_ring->desc = NULL;
1756         rrd_ring->dma = 0;
1757 }
1758
1759 s32 atl1_up(struct atl1_adapter *adapter)
1760 {
1761         struct net_device *netdev = adapter->netdev;
1762         int err;
1763         int irq_flags = IRQF_SAMPLE_RANDOM;
1764
1765         /* hardware has been reset, we need to reload some things */
1766         atl1_set_multi(netdev);
1767         atl1_restore_vlan(adapter);
1768         err = atl1_alloc_rx_buffers(adapter);
1769         if (unlikely(!err))             /* no RX BUFFER allocated */
1770                 return -ENOMEM;
1771
1772         if (unlikely(atl1_configure(adapter))) {
1773                 err = -EIO;
1774                 goto err_up;
1775         }
1776
1777         err = pci_enable_msi(adapter->pdev);
1778         if (err) {
1779                 dev_info(&adapter->pdev->dev,
1780                         "Unable to enable MSI: %d\n", err);
1781                 irq_flags |= IRQF_SHARED;
1782         }
1783
1784         err = request_irq(adapter->pdev->irq, &atl1_intr, irq_flags,
1785                         netdev->name, netdev);
1786         if (unlikely(err))
1787                 goto err_up;
1788
1789         mod_timer(&adapter->watchdog_timer, jiffies);
1790         atl1_irq_enable(adapter);
1791         atl1_check_link(adapter);
1792         return 0;
1793
1794         /* FIXME: unreachable code! -- CHS */
1795         /* free irq disable any interrupt */
1796         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
1797         free_irq(adapter->pdev->irq, netdev);
1798
1799 err_up:
1800         pci_disable_msi(adapter->pdev);
1801         /* free rx_buffers */
1802         atl1_clean_rx_ring(adapter);
1803         return err;
1804 }
1805
1806 void atl1_down(struct atl1_adapter *adapter)
1807 {
1808         struct net_device *netdev = adapter->netdev;
1809
1810         del_timer_sync(&adapter->watchdog_timer);
1811         del_timer_sync(&adapter->phy_config_timer);
1812         adapter->phy_timer_pending = false;
1813
1814         atl1_irq_disable(adapter);
1815         free_irq(adapter->pdev->irq, netdev);
1816         pci_disable_msi(adapter->pdev);
1817         atl1_reset_hw(&adapter->hw);
1818         adapter->cmb.cmb->int_stats = 0;
1819
1820         adapter->link_speed = SPEED_0;
1821         adapter->link_duplex = -1;
1822         netif_carrier_off(netdev);
1823         netif_stop_queue(netdev);
1824
1825         atl1_clean_tx_ring(adapter);
1826         atl1_clean_rx_ring(adapter);
1827 }
1828
1829 /*
1830  * atl1_change_mtu - Change the Maximum Transfer Unit
1831  * @netdev: network interface device structure
1832  * @new_mtu: new value for maximum frame size
1833  *
1834  * Returns 0 on success, negative on failure
1835  */
1836 static int atl1_change_mtu(struct net_device *netdev, int new_mtu)
1837 {
1838         struct atl1_adapter *adapter = netdev_priv(netdev);
1839         int old_mtu = netdev->mtu;
1840         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1841
1842         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
1843             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
1844                 printk(KERN_WARNING "%s: invalid MTU setting\n",
1845                         atl1_driver_name);
1846                 return -EINVAL;
1847         }
1848
1849         adapter->hw.max_frame_size = max_frame;
1850         adapter->hw.tx_jumbo_task_th = (max_frame + 7) >> 3;
1851         adapter->rx_buffer_len = (max_frame + 7) & ~7;
1852         adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;
1853
1854         netdev->mtu = new_mtu;
1855         if ((old_mtu != new_mtu) && netif_running(netdev)) {
1856                 atl1_down(adapter);
1857                 atl1_up(adapter);
1858         }
1859
1860         return 0;
1861 }
1862
1863 /*
1864  * atl1_set_mac - Change the Ethernet Address of the NIC
1865  * @netdev: network interface device structure
1866  * @p: pointer to an address structure
1867  *
1868  * Returns 0 on success, negative on failure
1869  */
1870 static int atl1_set_mac(struct net_device *netdev, void *p)
1871 {
1872         struct atl1_adapter *adapter = netdev_priv(netdev);
1873         struct sockaddr *addr = p;
1874
1875         if (netif_running(netdev))
1876                 return -EBUSY;
1877
1878         if (!is_valid_ether_addr(addr->sa_data))
1879                 return -EADDRNOTAVAIL;
1880
1881         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1882         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
1883
1884         atl1_set_mac_addr(&adapter->hw);
1885         return 0;
1886 }
1887
1888 /*
1889  * atl1_watchdog - Timer Call-back
1890  * @data: pointer to netdev cast into an unsigned long
1891  */
1892 static void atl1_watchdog(unsigned long data)
1893 {
1894         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
1895
1896         /* Reset the timer */
1897         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1898 }
1899
1900 static int mdio_read(struct net_device *netdev, int phy_id, int reg_num)
1901 {
1902         struct atl1_adapter *adapter = netdev_priv(netdev);
1903         u16 result;
1904
1905         atl1_read_phy_reg(&adapter->hw, reg_num & 0x1f, &result);
1906
1907         return result;
1908 }
1909
1910 static void mdio_write(struct net_device *netdev, int phy_id, int reg_num, int val)
1911 {
1912         struct atl1_adapter *adapter = netdev_priv(netdev);
1913
1914         atl1_write_phy_reg(&adapter->hw, reg_num, val);
1915 }
1916
1917 /*
1918  * atl1_mii_ioctl -
1919  * @netdev:
1920  * @ifreq:
1921  * @cmd:
1922  */
1923 static int atl1_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1924 {
1925         struct atl1_adapter *adapter = netdev_priv(netdev);
1926         unsigned long flags;
1927         int retval;
1928
1929         if (!netif_running(netdev))
1930                 return -EINVAL;
1931
1932         spin_lock_irqsave(&adapter->lock, flags);
1933         retval = generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
1934         spin_unlock_irqrestore(&adapter->lock, flags);
1935
1936         return retval;
1937 }
1938
1939 /*
1940  * atl1_ioctl -
1941  * @netdev:
1942  * @ifreq:
1943  * @cmd:
1944  */
1945 static int atl1_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1946 {
1947         switch (cmd) {
1948         case SIOCGMIIPHY:
1949         case SIOCGMIIREG:
1950         case SIOCSMIIREG:
1951                 return atl1_mii_ioctl(netdev, ifr, cmd);
1952         default:
1953                 return -EOPNOTSUPP;
1954         }
1955 }
1956
1957 /*
1958  * atl1_tx_timeout - Respond to a Tx Hang
1959  * @netdev: network interface device structure
1960  */
1961 static void atl1_tx_timeout(struct net_device *netdev)
1962 {
1963         struct atl1_adapter *adapter = netdev_priv(netdev);
1964         /* Do the reset outside of interrupt context */
1965         schedule_work(&adapter->tx_timeout_task);
1966 }
1967
1968 /*
1969  * atl1_phy_config - Timer Call-back
1970  * @data: pointer to netdev cast into an unsigned long
1971  */
1972 static void atl1_phy_config(unsigned long data)
1973 {
1974         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
1975         struct atl1_hw *hw = &adapter->hw;
1976         unsigned long flags;
1977
1978         spin_lock_irqsave(&adapter->lock, flags);
1979         adapter->phy_timer_pending = false;
1980         atl1_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
1981         atl1_write_phy_reg(hw, MII_AT001_CR, hw->mii_1000t_ctrl_reg);
1982         atl1_write_phy_reg(hw, MII_BMCR, MII_CR_RESET | MII_CR_AUTO_NEG_EN);
1983         spin_unlock_irqrestore(&adapter->lock, flags);
1984 }
1985
1986 int atl1_reset(struct atl1_adapter *adapter)
1987 {
1988         int ret;
1989
1990         ret = atl1_reset_hw(&adapter->hw);
1991         if (ret != ATL1_SUCCESS)
1992                 return ret;
1993         return atl1_init_hw(&adapter->hw);
1994 }
1995
1996 /*
1997  * atl1_open - Called when a network interface is made active
1998  * @netdev: network interface device structure
1999  *
2000  * Returns 0 on success, negative value on failure
2001  *
2002  * The open entry point is called when a network interface is made
2003  * active by the system (IFF_UP).  At this point all resources needed
2004  * for transmit and receive operations are allocated, the interrupt
2005  * handler is registered with the OS, the watchdog timer is started,
2006  * and the stack is notified that the interface is ready.
2007  */
2008 static int atl1_open(struct net_device *netdev)
2009 {
2010         struct atl1_adapter *adapter = netdev_priv(netdev);
2011         int err;
2012
2013         /* allocate transmit descriptors */
2014         err = atl1_setup_ring_resources(adapter);
2015         if (err)
2016                 return err;
2017
2018         err = atl1_up(adapter);
2019         if (err)
2020                 goto err_up;
2021
2022         return 0;
2023
2024 err_up:
2025         atl1_reset(adapter);
2026         return err;
2027 }
2028
2029 /*
2030  * atl1_close - Disables a network interface
2031  * @netdev: network interface device structure
2032  *
2033  * Returns 0, this is not allowed to fail
2034  *
2035  * The close entry point is called when an interface is de-activated
2036  * by the OS.  The hardware is still under the drivers control, but
2037  * needs to be disabled.  A global MAC reset is issued to stop the
2038  * hardware, and all transmit and receive resources are freed.
2039  */
2040 static int atl1_close(struct net_device *netdev)
2041 {
2042         struct atl1_adapter *adapter = netdev_priv(netdev);
2043         atl1_down(adapter);
2044         atl1_free_ring_resources(adapter);
2045         return 0;
2046 }
2047
2048 /*
2049  * If TPD Buffer size equal to 0, PCIE DMAR_TO_INT
2050  * will assert. We do soft reset <0x1400=1> according
2051  * with the SPEC. BUT, it seemes that PCIE or DMA
2052  * state-machine will not be reset. DMAR_TO_INT will
2053  * assert again and again.
2054  */
2055 static void atl1_tx_timeout_task(struct work_struct *work)
2056 {
2057         struct atl1_adapter *adapter =
2058                 container_of(work, struct atl1_adapter, tx_timeout_task);
2059         struct net_device *netdev = adapter->netdev;
2060
2061         netif_device_detach(netdev);
2062         atl1_down(adapter);
2063         atl1_up(adapter);
2064         netif_device_attach(netdev);
2065 }
2066
2067 /*
2068  * atl1_link_chg_task - deal with link change event Out of interrupt context
2069  */
2070 static void atl1_link_chg_task(struct work_struct *work)
2071 {
2072         struct atl1_adapter *adapter =
2073                container_of(work, struct atl1_adapter, link_chg_task);
2074         unsigned long flags;
2075
2076         spin_lock_irqsave(&adapter->lock, flags);
2077         atl1_check_link(adapter);
2078         spin_unlock_irqrestore(&adapter->lock, flags);
2079 }
2080
2081 /*
2082  * atl1_pcie_patch - Patch for PCIE module
2083  */
2084 static void atl1_pcie_patch(struct atl1_adapter *adapter)
2085 {
2086         u32 value;
2087         value = 0x6500;
2088         iowrite32(value, adapter->hw.hw_addr + 0x12FC);
2089         /* pcie flow control mode change */
2090         value = ioread32(adapter->hw.hw_addr + 0x1008);
2091         value |= 0x8000;
2092         iowrite32(value, adapter->hw.hw_addr + 0x1008);
2093 }
2094
2095 /*
2096  * When ACPI resume on some VIA MotherBoard, the Interrupt Disable bit/0x400
2097  * on PCI Command register is disable.
2098  * The function enable this bit.
2099  * Brackett, 2006/03/15
2100  */
2101 static void atl1_via_workaround(struct atl1_adapter *adapter)
2102 {
2103         unsigned long value;
2104
2105         value = ioread16(adapter->hw.hw_addr + PCI_COMMAND);
2106         if (value & PCI_COMMAND_INTX_DISABLE)
2107                 value &= ~PCI_COMMAND_INTX_DISABLE;
2108         iowrite32(value, adapter->hw.hw_addr + PCI_COMMAND);
2109 }
2110
2111 /*
2112  * atl1_probe - Device Initialization Routine
2113  * @pdev: PCI device information struct
2114  * @ent: entry in atl1_pci_tbl
2115  *
2116  * Returns 0 on success, negative on failure
2117  *
2118  * atl1_probe initializes an adapter identified by a pci_dev structure.
2119  * The OS initialization, configuring of the adapter private structure,
2120  * and a hardware reset occur.
2121  */
2122 static int __devinit atl1_probe(struct pci_dev *pdev,
2123                               const struct pci_device_id *ent)
2124 {
2125         struct net_device *netdev;
2126         struct atl1_adapter *adapter;
2127         static int cards_found = 0;
2128         bool pci_using_64 = true;
2129         int err;
2130
2131         err = pci_enable_device(pdev);
2132         if (err)
2133                 return err;
2134
2135         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
2136         if (err) {
2137                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2138                 if (err) {
2139                         printk(KERN_DEBUG
2140                                 "%s: no usable DMA configuration, aborting\n",
2141                                 atl1_driver_name);
2142                         goto err_dma;
2143                 }
2144                 pci_using_64 = false;
2145         }
2146         /* Mark all PCI regions associated with PCI device
2147          * pdev as being reserved by owner atl1_driver_name
2148          */
2149         err = pci_request_regions(pdev, atl1_driver_name);
2150         if (err)
2151                 goto err_request_regions;
2152
2153         /* Enables bus-mastering on the device and calls
2154          * pcibios_set_master to do the needed arch specific settings
2155          */
2156         pci_set_master(pdev);
2157
2158         netdev = alloc_etherdev(sizeof(struct atl1_adapter));
2159         if (!netdev) {
2160                 err = -ENOMEM;
2161                 goto err_alloc_etherdev;
2162         }
2163         SET_MODULE_OWNER(netdev);
2164         SET_NETDEV_DEV(netdev, &pdev->dev);
2165
2166         pci_set_drvdata(pdev, netdev);
2167         adapter = netdev_priv(netdev);
2168         adapter->netdev = netdev;
2169         adapter->pdev = pdev;
2170         adapter->hw.back = adapter;
2171
2172         adapter->hw.hw_addr = pci_iomap(pdev, 0, 0);
2173         if (!adapter->hw.hw_addr) {
2174                 err = -EIO;
2175                 goto err_pci_iomap;
2176         }
2177         /* get device revision number */
2178         adapter->hw.dev_rev = ioread16(adapter->hw.hw_addr + (REG_MASTER_CTRL + 2));
2179
2180         /* set default ring resource counts */
2181         adapter->rfd_ring.count = adapter->rrd_ring.count = ATL1_DEFAULT_RFD;
2182         adapter->tpd_ring.count = ATL1_DEFAULT_TPD;
2183
2184         adapter->mii.dev = netdev;
2185         adapter->mii.mdio_read = mdio_read;
2186         adapter->mii.mdio_write = mdio_write;
2187         adapter->mii.phy_id_mask = 0x1f;
2188         adapter->mii.reg_num_mask = 0x1f;
2189
2190         netdev->open = &atl1_open;
2191         netdev->stop = &atl1_close;
2192         netdev->hard_start_xmit = &atl1_xmit_frame;
2193         netdev->get_stats = &atl1_get_stats;
2194         netdev->set_multicast_list = &atl1_set_multi;
2195         netdev->set_mac_address = &atl1_set_mac;
2196         netdev->change_mtu = &atl1_change_mtu;
2197         netdev->do_ioctl = &atl1_ioctl;
2198         netdev->tx_timeout = &atl1_tx_timeout;
2199         netdev->watchdog_timeo = 5 * HZ;
2200         netdev->vlan_rx_register = atl1_vlan_rx_register;
2201         netdev->vlan_rx_add_vid = atl1_vlan_rx_add_vid;
2202         netdev->vlan_rx_kill_vid = atl1_vlan_rx_kill_vid;
2203         netdev->ethtool_ops = &atl1_ethtool_ops;
2204         adapter->bd_number = cards_found;
2205         adapter->pci_using_64 = pci_using_64;
2206
2207         /* setup the private structure */
2208         err = atl1_sw_init(adapter);
2209         if (err)
2210                 goto err_common;
2211
2212         netdev->features = NETIF_F_HW_CSUM;
2213         netdev->features |= NETIF_F_SG;
2214         netdev->features |= (NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
2215
2216         /*
2217          * FIXME - Until tso performance gets fixed, disable the feature.
2218          * Enable it with ethtool -K if desired.
2219          */
2220         /* netdev->features |= NETIF_F_TSO; */
2221
2222         if (pci_using_64)
2223                 netdev->features |= NETIF_F_HIGHDMA;
2224
2225         netdev->features |= NETIF_F_LLTX;
2226
2227         /*
2228          * patch for some L1 of old version,
2229          * the final version of L1 may not need these
2230          * patches
2231          */
2232         /* atl1_pcie_patch(adapter); */
2233
2234         /* really reset GPHY core */
2235         iowrite16(0, adapter->hw.hw_addr + REG_GPHY_ENABLE);
2236
2237         /*
2238          * reset the controller to
2239          * put the device in a known good starting state
2240          */
2241         if (atl1_reset_hw(&adapter->hw)) {
2242                 err = -EIO;
2243                 goto err_common;
2244         }
2245
2246         /* copy the MAC address out of the EEPROM */
2247         atl1_read_mac_addr(&adapter->hw);
2248         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2249
2250         if (!is_valid_ether_addr(netdev->dev_addr)) {
2251                 err = -EIO;
2252                 goto err_common;
2253         }
2254
2255         atl1_check_options(adapter);
2256
2257         /* pre-init the MAC, and setup link */
2258         err = atl1_init_hw(&adapter->hw);
2259         if (err) {
2260                 err = -EIO;
2261                 goto err_common;
2262         }
2263
2264         atl1_pcie_patch(adapter);
2265         /* assume we have no link for now */
2266         netif_carrier_off(netdev);
2267         netif_stop_queue(netdev);
2268
2269         init_timer(&adapter->watchdog_timer);
2270         adapter->watchdog_timer.function = &atl1_watchdog;
2271         adapter->watchdog_timer.data = (unsigned long)adapter;
2272
2273         init_timer(&adapter->phy_config_timer);
2274         adapter->phy_config_timer.function = &atl1_phy_config;
2275         adapter->phy_config_timer.data = (unsigned long)adapter;
2276         adapter->phy_timer_pending = false;
2277
2278         INIT_WORK(&adapter->tx_timeout_task, atl1_tx_timeout_task);
2279
2280         INIT_WORK(&adapter->link_chg_task, atl1_link_chg_task);
2281
2282         INIT_WORK(&adapter->pcie_dma_to_rst_task, atl1_tx_timeout_task);
2283
2284         err = register_netdev(netdev);
2285         if (err)
2286                 goto err_common;
2287
2288         cards_found++;
2289         atl1_via_workaround(adapter);
2290         return 0;
2291
2292 err_common:
2293         pci_iounmap(pdev, adapter->hw.hw_addr);
2294 err_pci_iomap:
2295         free_netdev(netdev);
2296 err_alloc_etherdev:
2297         pci_release_regions(pdev);
2298 err_dma:
2299 err_request_regions:
2300         pci_disable_device(pdev);
2301         return err;
2302 }
2303
2304 /*
2305  * atl1_remove - Device Removal Routine
2306  * @pdev: PCI device information struct
2307  *
2308  * atl1_remove is called by the PCI subsystem to alert the driver
2309  * that it should release a PCI device.  The could be caused by a
2310  * Hot-Plug event, or because the driver is going to be removed from
2311  * memory.
2312  */
2313 static void __devexit atl1_remove(struct pci_dev *pdev)
2314 {
2315         struct net_device *netdev = pci_get_drvdata(pdev);
2316         struct atl1_adapter *adapter;
2317         /* Device not available. Return. */
2318         if (!netdev)
2319                 return;
2320
2321         adapter = netdev_priv(netdev);
2322
2323         /* Some atl1 boards lack persistent storage for their MAC, and get it
2324          * from the BIOS during POST.  If we've been messing with the MAC
2325          * address, we need to save the permanent one.
2326          */
2327         if (memcmp(adapter->hw.mac_addr, adapter->hw.perm_mac_addr, ETH_ALEN)) {
2328                 memcpy(adapter->hw.mac_addr, adapter->hw.perm_mac_addr, ETH_ALEN);
2329                 atl1_set_mac_addr(&adapter->hw);
2330         }
2331
2332         iowrite16(0, adapter->hw.hw_addr + REG_GPHY_ENABLE);
2333         unregister_netdev(netdev);
2334         pci_iounmap(pdev, adapter->hw.hw_addr);
2335         pci_release_regions(pdev);
2336         free_netdev(netdev);
2337         pci_disable_device(pdev);
2338 }
2339
2340 #ifdef CONFIG_PM
2341 static int atl1_suspend(struct pci_dev *pdev, pm_message_t state)
2342 {
2343         struct net_device *netdev = pci_get_drvdata(pdev);
2344         struct atl1_adapter *adapter = netdev_priv(netdev);
2345         struct atl1_hw *hw = &adapter->hw;
2346         u32 ctrl = 0;
2347         u32 wufc = adapter->wol;
2348
2349         netif_device_detach(netdev);
2350         if (netif_running(netdev))
2351                 atl1_down(adapter);
2352
2353         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2354         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2355         if (ctrl & BMSR_LSTATUS)
2356                 wufc &= ~ATL1_WUFC_LNKC;
2357
2358         /* reduce speed to 10/100M */
2359         if (wufc) {
2360                 atl1_phy_enter_power_saving(hw);
2361                 /* if resume, let driver to re- setup link */
2362                 hw->phy_configured = false;
2363                 atl1_set_mac_addr(hw);
2364                 atl1_set_multi(netdev);
2365
2366                 ctrl = 0;
2367                 /* turn on magic packet wol */
2368                 if (wufc & ATL1_WUFC_MAG)
2369                         ctrl = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2370
2371                 /* turn on Link change WOL */
2372                 if (wufc & ATL1_WUFC_LNKC)
2373                         ctrl |= (WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN);
2374                 iowrite32(ctrl, hw->hw_addr + REG_WOL_CTRL);
2375
2376                 /* turn on all-multi mode if wake on multicast is enabled */
2377                 ctrl = ioread32(hw->hw_addr + REG_MAC_CTRL);
2378                 ctrl &= ~MAC_CTRL_DBG;
2379                 ctrl &= ~MAC_CTRL_PROMIS_EN;
2380                 if (wufc & ATL1_WUFC_MC)
2381                         ctrl |= MAC_CTRL_MC_ALL_EN;
2382                 else
2383                         ctrl &= ~MAC_CTRL_MC_ALL_EN;
2384
2385                 /* turn on broadcast mode if wake on-BC is enabled */
2386                 if (wufc & ATL1_WUFC_BC)
2387                         ctrl |= MAC_CTRL_BC_EN;
2388                 else
2389                         ctrl &= ~MAC_CTRL_BC_EN;
2390
2391                 /* enable RX */
2392                 ctrl |= MAC_CTRL_RX_EN;
2393                 iowrite32(ctrl, hw->hw_addr + REG_MAC_CTRL);
2394                 pci_enable_wake(pdev, PCI_D3hot, 1);
2395                 pci_enable_wake(pdev, PCI_D3cold, 1);   /* 4 == D3 cold */
2396         } else {
2397                 iowrite32(0, hw->hw_addr + REG_WOL_CTRL);
2398                 pci_enable_wake(pdev, PCI_D3hot, 0);
2399                 pci_enable_wake(pdev, PCI_D3cold, 0);   /* 4 == D3 cold */
2400         }
2401
2402         pci_save_state(pdev);
2403         pci_disable_device(pdev);
2404
2405         pci_set_power_state(pdev, PCI_D3hot);
2406
2407         return 0;
2408 }
2409
2410 static int atl1_resume(struct pci_dev *pdev)
2411 {
2412         struct net_device *netdev = pci_get_drvdata(pdev);
2413         struct atl1_adapter *adapter = netdev_priv(netdev);
2414         u32 ret_val;
2415
2416         pci_set_power_state(pdev, 0);
2417         pci_restore_state(pdev);
2418
2419         ret_val = pci_enable_device(pdev);
2420         pci_enable_wake(pdev, PCI_D3hot, 0);
2421         pci_enable_wake(pdev, PCI_D3cold, 0);
2422
2423         iowrite32(0, adapter->hw.hw_addr + REG_WOL_CTRL);
2424         atl1_reset(adapter);
2425
2426         if (netif_running(netdev))
2427                 atl1_up(adapter);
2428         netif_device_attach(netdev);
2429
2430         atl1_via_workaround(adapter);
2431
2432         return 0;
2433 }
2434 #else
2435 #define atl1_suspend NULL
2436 #define atl1_resume NULL
2437 #endif
2438
2439 static struct pci_driver atl1_driver = {
2440         .name = atl1_driver_name,
2441         .id_table = atl1_pci_tbl,
2442         .probe = atl1_probe,
2443         .remove = __devexit_p(atl1_remove),
2444         /* Power Managment Hooks */
2445         /* probably broken right now -- CHS */
2446         .suspend = atl1_suspend,
2447         .resume = atl1_resume
2448 };
2449
2450 /*
2451  * atl1_exit_module - Driver Exit Cleanup Routine
2452  *
2453  * atl1_exit_module is called just before the driver is removed
2454  * from memory.
2455  */
2456 static void __exit atl1_exit_module(void)
2457 {
2458         pci_unregister_driver(&atl1_driver);
2459 }
2460
2461 /*
2462  * atl1_init_module - Driver Registration Routine
2463  *
2464  * atl1_init_module is the first routine called when the driver is
2465  * loaded. All it does is register with the PCI subsystem.
2466  */
2467 static int __init atl1_init_module(void)
2468 {
2469         printk(KERN_INFO "%s - version %s\n", atl1_driver_string, DRIVER_VERSION);
2470         printk(KERN_INFO "%s\n", atl1_copyright);
2471         return pci_register_driver(&atl1_driver);
2472 }
2473
2474 module_init(atl1_init_module);
2475 module_exit(atl1_exit_module);