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.
  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         spin_lock_init(&adapter->lock);
 166         spin_lock_init(&adapter->mb_lock);
 167
 168         return 0;
 169 }
 170
 171 /*
 172  * atl1_setup_mem_resources - allocate Tx / RX descriptor resources
 173  * @adapter: board private structure
 174  *
 175  * Return 0 on success, negative on failure
 176  */
 177 s32 atl1_setup_ring_resources(struct atl1_adapter *adapter)
 178 {
 179         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 180         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 181         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 182         struct atl1_ring_header *ring_header = &adapter->ring_header;
 183         struct pci_dev *pdev = adapter->pdev;
 184         int size;
 185         u8 offset = 0;
 186
 187         size = sizeof(struct atl1_buffer) * (tpd_ring->count + rfd_ring->count);
 188         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 189         if (unlikely(!tpd_ring->buffer_info)) {
 190                 dev_err(&pdev->dev, "kzalloc failed , size = D%d\n", size);
 191                 goto err_nomem;
 192         }
 193         rfd_ring->buffer_info =
 194                 (struct atl1_buffer *)(tpd_ring->buffer_info + tpd_ring->count);
 195
 196         /* real ring DMA buffer
 197          * each ring/block may need up to 8 bytes for alignment, hence the
 198          * additional 40 bytes tacked onto the end.
 199          */
 200         ring_header->size = size =
 201                 sizeof(struct tx_packet_desc) * tpd_ring->count
 202                 + sizeof(struct rx_free_desc) * rfd_ring->count
 203                 + sizeof(struct rx_return_desc) * rrd_ring->count
 204                 + sizeof(struct coals_msg_block)
 205                 + sizeof(struct stats_msg_block)
 206                 + 40;
 207
 208         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 209                 &ring_header->dma);
 210         if (unlikely(!ring_header->desc)) {
 211                 dev_err(&pdev->dev, "pci_alloc_consistent failed\n");
 212                 goto err_nomem;
 213         }
 214
 215         memset(ring_header->desc, 0, ring_header->size);
 216
 217         /* init TPD ring */
 218         tpd_ring->dma = ring_header->dma;
 219         offset = (tpd_ring->dma & 0x7) ? (8 - (ring_header->dma & 0x7)) : 0;
 220         tpd_ring->dma += offset;
 221         tpd_ring->desc = (u8 *) ring_header->desc + offset;
 222         tpd_ring->size = sizeof(struct tx_packet_desc) * tpd_ring->count;
 223         atomic_set(&tpd_ring->next_to_use, 0);
 224         atomic_set(&tpd_ring->next_to_clean, 0);
 225
 226         /* init RFD ring */
 227         rfd_ring->dma = tpd_ring->dma + tpd_ring->size;
 228         offset = (rfd_ring->dma & 0x7) ? (8 - (rfd_ring->dma & 0x7)) : 0;
 229         rfd_ring->dma += offset;
 230         rfd_ring->desc = (u8 *) tpd_ring->desc + (tpd_ring->size + offset);
 231         rfd_ring->size = sizeof(struct rx_free_desc) * rfd_ring->count;
 232         rfd_ring->next_to_clean = 0;
 233         atomic_set(&rfd_ring->next_to_use, 0);
 234
 235         /* init RRD ring */
 236         rrd_ring->dma = rfd_ring->dma + rfd_ring->size;
 237         offset = (rrd_ring->dma & 0x7) ? (8 - (rrd_ring->dma & 0x7)) : 0;
 238         rrd_ring->dma += offset;
 239         rrd_ring->desc = (u8 *) rfd_ring->desc + (rfd_ring->size + offset);
 240         rrd_ring->size = sizeof(struct rx_return_desc) * rrd_ring->count;
 241         rrd_ring->next_to_use = 0;
 242         atomic_set(&rrd_ring->next_to_clean, 0);
 243
 244         /* init CMB */
 245         adapter->cmb.dma = rrd_ring->dma + rrd_ring->size;
 246         offset = (adapter->cmb.dma & 0x7) ? (8 - (adapter->cmb.dma & 0x7)) : 0;
 247         adapter->cmb.dma += offset;
 248         adapter->cmb.cmb = (struct coals_msg_block *)
 249                 ((u8 *) rrd_ring->desc + (rrd_ring->size + offset));
 250
 251         /* init SMB */
 252         adapter->smb.dma = adapter->cmb.dma + sizeof(struct coals_msg_block);
 253         offset = (adapter->smb.dma & 0x7) ? (8 - (adapter->smb.dma & 0x7)) : 0;
 254         adapter->smb.dma += offset;
 255         adapter->smb.smb = (struct stats_msg_block *)
 256                 ((u8 *) adapter->cmb.cmb +
 257                 (sizeof(struct coals_msg_block) + offset));
 258
 259         return ATL1_SUCCESS;
 260
 261 err_nomem:
 262         kfree(tpd_ring->buffer_info);
 263         return -ENOMEM;
 264 }
 265
 266 /*
 267  * atl1_irq_enable - Enable default interrupt generation settings
 268  * @adapter: board private structure
 269  */
 270 static void atl1_irq_enable(struct atl1_adapter *adapter)
 271 {
 272         iowrite32(IMR_NORMAL_MASK, adapter->hw.hw_addr + REG_IMR);
 273         ioread32(adapter->hw.hw_addr + REG_IMR);
 274 }
 275
 276 static void atl1_clear_phy_int(struct atl1_adapter *adapter)
 277 {
 278         u16 phy_data;
 279         unsigned long flags;
 280
 281         spin_lock_irqsave(&adapter->lock, flags);
 282         atl1_read_phy_reg(&adapter->hw, 19, &phy_data);
 283         spin_unlock_irqrestore(&adapter->lock, flags);
 284 }
 285
 286 static void atl1_inc_smb(struct atl1_adapter *adapter)
 287 {
 288         struct stats_msg_block *smb = adapter->smb.smb;
 289
 290         /* Fill out the OS statistics structure */
 291         adapter->soft_stats.rx_packets += smb->rx_ok;
 292         adapter->soft_stats.tx_packets += smb->tx_ok;
 293         adapter->soft_stats.rx_bytes += smb->rx_byte_cnt;
 294         adapter->soft_stats.tx_bytes += smb->tx_byte_cnt;
 295         adapter->soft_stats.multicast += smb->rx_mcast;
 296         adapter->soft_stats.collisions += (smb->tx_1_col + smb->tx_2_col * 2 +
 297                 smb->tx_late_col + smb->tx_abort_col * adapter->hw.max_retry);
 298
 299         /* Rx Errors */
 300         adapter->soft_stats.rx_errors += (smb->rx_frag + smb->rx_fcs_err +
 301                 smb->rx_len_err + smb->rx_sz_ov + smb->rx_rxf_ov +
 302                 smb->rx_rrd_ov + smb->rx_align_err);
 303         adapter->soft_stats.rx_fifo_errors += smb->rx_rxf_ov;
 304         adapter->soft_stats.rx_length_errors += smb->rx_len_err;
 305         adapter->soft_stats.rx_crc_errors += smb->rx_fcs_err;
 306         adapter->soft_stats.rx_frame_errors += smb->rx_align_err;
 307         adapter->soft_stats.rx_missed_errors += (smb->rx_rrd_ov +
 308                 smb->rx_rxf_ov);
 309
 310         adapter->soft_stats.rx_pause += smb->rx_pause;
 311         adapter->soft_stats.rx_rrd_ov += smb->rx_rrd_ov;
 312         adapter->soft_stats.rx_trunc += smb->rx_sz_ov;
 313
 314         /* Tx Errors */
 315         adapter->soft_stats.tx_errors += (smb->tx_late_col +
 316                 smb->tx_abort_col + smb->tx_underrun + smb->tx_trunc);
 317         adapter->soft_stats.tx_fifo_errors += smb->tx_underrun;
 318         adapter->soft_stats.tx_aborted_errors += smb->tx_abort_col;
 319         adapter->soft_stats.tx_window_errors += smb->tx_late_col;
 320
 321         adapter->soft_stats.excecol += smb->tx_abort_col;
 322         adapter->soft_stats.deffer += smb->tx_defer;
 323         adapter->soft_stats.scc += smb->tx_1_col;
 324         adapter->soft_stats.mcc += smb->tx_2_col;
 325         adapter->soft_stats.latecol += smb->tx_late_col;
 326         adapter->soft_stats.tx_underun += smb->tx_underrun;
 327         adapter->soft_stats.tx_trunc += smb->tx_trunc;
 328         adapter->soft_stats.tx_pause += smb->tx_pause;
 329
 330         adapter->net_stats.rx_packets = adapter->soft_stats.rx_packets;
 331         adapter->net_stats.tx_packets = adapter->soft_stats.tx_packets;
 332         adapter->net_stats.rx_bytes = adapter->soft_stats.rx_bytes;
 333         adapter->net_stats.tx_bytes = adapter->soft_stats.tx_bytes;
 334         adapter->net_stats.multicast = adapter->soft_stats.multicast;
 335         adapter->net_stats.collisions = adapter->soft_stats.collisions;
 336         adapter->net_stats.rx_errors = adapter->soft_stats.rx_errors;
 337         adapter->net_stats.rx_over_errors =
 338                 adapter->soft_stats.rx_missed_errors;
 339         adapter->net_stats.rx_length_errors =
 340                 adapter->soft_stats.rx_length_errors;
 341         adapter->net_stats.rx_crc_errors = adapter->soft_stats.rx_crc_errors;
 342         adapter->net_stats.rx_frame_errors =
 343                 adapter->soft_stats.rx_frame_errors;
 344         adapter->net_stats.rx_fifo_errors = adapter->soft_stats.rx_fifo_errors;
 345         adapter->net_stats.rx_missed_errors =
 346                 adapter->soft_stats.rx_missed_errors;
 347         adapter->net_stats.tx_errors = adapter->soft_stats.tx_errors;
 348         adapter->net_stats.tx_fifo_errors = adapter->soft_stats.tx_fifo_errors;
 349         adapter->net_stats.tx_aborted_errors =
 350                 adapter->soft_stats.tx_aborted_errors;
 351         adapter->net_stats.tx_window_errors =
 352                 adapter->soft_stats.tx_window_errors;
 353         adapter->net_stats.tx_carrier_errors =
 354                 adapter->soft_stats.tx_carrier_errors;
 355 }
 356
 357 static void atl1_rx_checksum(struct atl1_adapter *adapter,
 358         struct rx_return_desc *rrd, struct sk_buff *skb)
 359 {
 360         struct pci_dev *pdev = adapter->pdev;
 361
 362         skb->ip_summed = CHECKSUM_NONE;
 363
 364         if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
 365                 if (rrd->err_flg & (ERR_FLAG_CRC | ERR_FLAG_TRUNC |
 366                                         ERR_FLAG_CODE | ERR_FLAG_OV)) {
 367                         adapter->hw_csum_err++;
 368                         dev_printk(KERN_DEBUG, &pdev->dev,
 369                                 "rx checksum error\n");
 370                         return;
 371                 }
 372         }
 373
 374         /* not IPv4 */
 375         if (!(rrd->pkt_flg & PACKET_FLAG_IPV4))
 376                 /* checksum is invalid, but it's not an IPv4 pkt, so ok */
 377                 return;
 378
 379         /* IPv4 packet */
 380         if (likely(!(rrd->err_flg &
 381                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM)))) {
 382                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 383                 adapter->hw_csum_good++;
 384                 return;
 385         }
 386
 387         /* IPv4, but hardware thinks its checksum is wrong */
 388         dev_printk(KERN_DEBUG, &pdev->dev,
 389                 "hw csum wrong, pkt_flag:%x, err_flag:%x\n",
 390                 rrd->pkt_flg, rrd->err_flg);
 391         skb->ip_summed = CHECKSUM_COMPLETE;
 392         skb->csum = htons(rrd->xsz.xsum_sz.rx_chksum);
 393         adapter->hw_csum_err++;
 394         return;
 395 }
 396
 397 /*
 398  * atl1_alloc_rx_buffers - Replace used receive buffers
 399  * @adapter: address of board private structure
 400  */
 401 static u16 atl1_alloc_rx_buffers(struct atl1_adapter *adapter)
 402 {
 403         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 404         struct pci_dev *pdev = adapter->pdev;
 405         struct page *page;
 406         unsigned long offset;
 407         struct atl1_buffer *buffer_info, *next_info;
 408         struct sk_buff *skb;
 409         u16 num_alloc = 0;
 410         u16 rfd_next_to_use, next_next;
 411         struct rx_free_desc *rfd_desc;
 412
 413         next_next = rfd_next_to_use = atomic_read(&rfd_ring->next_to_use);
 414         if (++next_next == rfd_ring->count)
 415                 next_next = 0;
 416         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
 417         next_info = &rfd_ring->buffer_info[next_next];
 418
 419         while (!buffer_info->alloced && !next_info->alloced) {
 420                 if (buffer_info->skb) {
 421                         buffer_info->alloced = 1;
 422                         goto next;
 423                 }
 424
 425                 rfd_desc = ATL1_RFD_DESC(rfd_ring, rfd_next_to_use);
 426
 427                 skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN);
 428                 if (unlikely(!skb)) {   /* Better luck next round */
 429                         adapter->net_stats.rx_dropped++;
 430                         break;
 431                 }
 432
 433                 /*
 434                  * Make buffer alignment 2 beyond a 16 byte boundary
 435                  * this will result in a 16 byte aligned IP header after
 436                  * the 14 byte MAC header is removed
 437                  */
 438                 skb_reserve(skb, NET_IP_ALIGN);
 439
 440                 buffer_info->alloced = 1;
 441                 buffer_info->skb = skb;
 442                 buffer_info->length = (u16) adapter->rx_buffer_len;
 443                 page = virt_to_page(skb->data);
 444                 offset = (unsigned long)skb->data & ~PAGE_MASK;
 445                 buffer_info->dma = pci_map_page(pdev, page, offset,
 446                                                 adapter->rx_buffer_len,
 447                                                 PCI_DMA_FROMDEVICE);
 448                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 449                 rfd_desc->buf_len = cpu_to_le16(adapter->rx_buffer_len);
 450                 rfd_desc->coalese = 0;
 451
 452 next:
 453                 rfd_next_to_use = next_next;
 454                 if (unlikely(++next_next == rfd_ring->count))
 455                         next_next = 0;
 456
 457                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
 458                 next_info = &rfd_ring->buffer_info[next_next];
 459                 num_alloc++;
 460         }
 461
 462         if (num_alloc) {
 463                 /*
 464                  * Force memory writes to complete before letting h/w
 465                  * know there are new descriptors to fetch.  (Only
 466                  * applicable for weak-ordered memory model archs,
 467                  * such as IA-64).
 468                  */
 469                 wmb();
 470                 atomic_set(&rfd_ring->next_to_use, (int)rfd_next_to_use);
 471         }
 472         return num_alloc;
 473 }
 474
 475 static void atl1_intr_rx(struct atl1_adapter *adapter)
 476 {
 477         int i, count;
 478         u16 length;
 479         u16 rrd_next_to_clean;
 480         u32 value;
 481         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 482         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 483         struct atl1_buffer *buffer_info;
 484         struct rx_return_desc *rrd;
 485         struct sk_buff *skb;
 486
 487         count = 0;
 488
 489         rrd_next_to_clean = atomic_read(&rrd_ring->next_to_clean);
 490
 491         while (1) {
 492                 rrd = ATL1_RRD_DESC(rrd_ring, rrd_next_to_clean);
 493                 i = 1;
 494                 if (likely(rrd->xsz.valid)) {   /* packet valid */
 495 chk_rrd:
 496                         /* check rrd status */
 497                         if (likely(rrd->num_buf == 1))
 498                                 goto rrd_ok;
 499
 500                         /* rrd seems to be bad */
 501                         if (unlikely(i-- > 0)) {
 502                                 /* rrd may not be DMAed completely */
 503                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
 504                                         "incomplete RRD DMA transfer\n");
 505                                 udelay(1);
 506                                 goto chk_rrd;
 507                         }
 508                         /* bad rrd */
 509                         dev_printk(KERN_DEBUG, &adapter->pdev->dev,
 510                                 "bad RRD\n");
 511                         /* see if update RFD index */
 512                         if (rrd->num_buf > 1) {
 513                                 u16 num_buf;
 514                                 num_buf =
 515                                     (rrd->xsz.xsum_sz.pkt_size +
 516                                      adapter->rx_buffer_len -
 517                                      1) / adapter->rx_buffer_len;
 518                                 if (rrd->num_buf == num_buf) {
 519                                         /* clean alloc flag for bad rrd */
 520                                         while (rfd_ring->next_to_clean !=
 521                                                (rrd->buf_indx + num_buf)) {
 522                                                 rfd_ring->buffer_info[rfd_ring->
 523                                                                       next_to_clean].alloced = 0;
 524                                                 if (++rfd_ring->next_to_clean ==
 525                                                     rfd_ring->count) {
 526                                                         rfd_ring->
 527                                                             next_to_clean = 0;
 528                                                 }
 529                                         }
 530                                 }
 531                         }
 532
 533                         /* update rrd */
 534                         rrd->xsz.valid = 0;
 535                         if (++rrd_next_to_clean == rrd_ring->count)
 536                                 rrd_next_to_clean = 0;
 537                         count++;
 538                         continue;
 539                 } else {        /* current rrd still not be updated */
 540
 541                         break;
 542                 }
 543 rrd_ok:
 544                 /* clean alloc flag for bad rrd */
 545                 while (rfd_ring->next_to_clean != rrd->buf_indx) {
 546                         rfd_ring->buffer_info[rfd_ring->next_to_clean].alloced =
 547                             0;
 548                         if (++rfd_ring->next_to_clean == rfd_ring->count)
 549                                 rfd_ring->next_to_clean = 0;
 550                 }
 551
 552                 buffer_info = &rfd_ring->buffer_info[rrd->buf_indx];
 553                 if (++rfd_ring->next_to_clean == rfd_ring->count)
 554                         rfd_ring->next_to_clean = 0;
 555
 556                 /* update rrd next to clean */
 557                 if (++rrd_next_to_clean == rrd_ring->count)
 558                         rrd_next_to_clean = 0;
 559                 count++;
 560
 561                 if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
 562                         if (!(rrd->err_flg &
 563                                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM
 564                                 | ERR_FLAG_LEN))) {
 565                                 /* packet error, don't need upstream */
 566                                 buffer_info->alloced = 0;
 567                                 rrd->xsz.valid = 0;
 568                                 continue;
 569                         }
 570                 }
 571
 572                 /* Good Receive */
 573                 pci_unmap_page(adapter->pdev, buffer_info->dma,
 574                                buffer_info->length, PCI_DMA_FROMDEVICE);
 575                 skb = buffer_info->skb;
 576                 length = le16_to_cpu(rrd->xsz.xsum_sz.pkt_size);
 577
 578                 skb_put(skb, length - ETHERNET_FCS_SIZE);
 579
 580                 /* Receive Checksum Offload */
 581                 atl1_rx_checksum(adapter, rrd, skb);
 582                 skb->protocol = eth_type_trans(skb, adapter->netdev);
 583
 584                 if (adapter->vlgrp && (rrd->pkt_flg & PACKET_FLAG_VLAN_INS)) {
 585                         u16 vlan_tag = (rrd->vlan_tag >> 4) |
 586                                         ((rrd->vlan_tag & 7) << 13) |
 587                                         ((rrd->vlan_tag & 8) << 9);
 588                         vlan_hwaccel_rx(skb, adapter->vlgrp, vlan_tag);
 589                 } else
 590                         netif_rx(skb);
 591
 592                 /* let protocol layer free skb */
 593                 buffer_info->skb = NULL;
 594                 buffer_info->alloced = 0;
 595                 rrd->xsz.valid = 0;
 596
 597                 adapter->netdev->last_rx = jiffies;
 598         }
 599
 600         atomic_set(&rrd_ring->next_to_clean, rrd_next_to_clean);
 601
 602         atl1_alloc_rx_buffers(adapter);
 603
 604         /* update mailbox ? */
 605         if (count) {
 606                 u32 tpd_next_to_use;
 607                 u32 rfd_next_to_use;
 608                 u32 rrd_next_to_clean;
 609
 610                 spin_lock(&adapter->mb_lock);
 611
 612                 tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
 613                 rfd_next_to_use =
 614                     atomic_read(&adapter->rfd_ring.next_to_use);
 615                 rrd_next_to_clean =
 616                     atomic_read(&adapter->rrd_ring.next_to_clean);
 617                 value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
 618                         MB_RFD_PROD_INDX_SHIFT) |
 619                         ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
 620                         MB_RRD_CONS_INDX_SHIFT) |
 621                         ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
 622                         MB_TPD_PROD_INDX_SHIFT);
 623                 iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
 624                 spin_unlock(&adapter->mb_lock);
 625         }
 626 }
 627
 628 static void atl1_intr_tx(struct atl1_adapter *adapter)
 629 {
 630         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 631         struct atl1_buffer *buffer_info;
 632         u16 sw_tpd_next_to_clean;
 633         u16 cmb_tpd_next_to_clean;
 634
 635         sw_tpd_next_to_clean = atomic_read(&tpd_ring->next_to_clean);
 636         cmb_tpd_next_to_clean = le16_to_cpu(adapter->cmb.cmb->tpd_cons_idx);
 637
 638         while (cmb_tpd_next_to_clean != sw_tpd_next_to_clean) {
 639                 struct tx_packet_desc *tpd;
 640
 641                 tpd = ATL1_TPD_DESC(tpd_ring, sw_tpd_next_to_clean);
 642                 buffer_info = &tpd_ring->buffer_info[sw_tpd_next_to_clean];
 643                 if (buffer_info->dma) {
 644                         pci_unmap_page(adapter->pdev, buffer_info->dma,
 645                                        buffer_info->length, PCI_DMA_TODEVICE);
 646                         buffer_info->dma = 0;
 647                 }
 648
 649                 if (buffer_info->skb) {
 650                         dev_kfree_skb_irq(buffer_info->skb);
 651                         buffer_info->skb = NULL;
 652                 }
 653                 tpd->buffer_addr = 0;
 654                 tpd->desc.data = 0;
 655
 656                 if (++sw_tpd_next_to_clean == tpd_ring->count)
 657                         sw_tpd_next_to_clean = 0;
 658         }
 659         atomic_set(&tpd_ring->next_to_clean, sw_tpd_next_to_clean);
 660
 661         if (netif_queue_stopped(adapter->netdev)
 662             && netif_carrier_ok(adapter->netdev))
 663                 netif_wake_queue(adapter->netdev);
 664 }
 665
 666 static void atl1_check_for_link(struct atl1_adapter *adapter)
 667 {
 668         struct net_device *netdev = adapter->netdev;
 669         u16 phy_data = 0;
 670
 671         spin_lock(&adapter->lock);
 672         adapter->phy_timer_pending = false;
 673         atl1_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 674         atl1_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 675         spin_unlock(&adapter->lock);
 676
 677         /* notify upper layer link down ASAP */
 678         if (!(phy_data & BMSR_LSTATUS)) {       /* Link Down */
 679                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 680                         dev_info(&adapter->pdev->dev, "%s link is down\n",
 681                                 netdev->name);
 682                         adapter->link_speed = SPEED_0;
 683                         netif_carrier_off(netdev);
 684                         netif_stop_queue(netdev);
 685                 }
 686         }
 687         schedule_work(&adapter->link_chg_task);
 688 }
 689
 690 /*
 691  * atl1_intr - Interrupt Handler
 692  * @irq: interrupt number
 693  * @data: pointer to a network interface device structure
 694  * @pt_regs: CPU registers structure
 695  */
 696 static irqreturn_t atl1_intr(int irq, void *data)
 697 {
 698         struct atl1_adapter *adapter = netdev_priv(data);
 699         u32 status;
 700         u8 update_rx;
 701         int max_ints = 10;
 702
 703         status = adapter->cmb.cmb->int_stats;
 704         if (!status)
 705                 return IRQ_NONE;
 706
 707         update_rx = 0;
 708
 709         do {
 710                 /* clear CMB interrupt status at once */
 711                 adapter->cmb.cmb->int_stats = 0;
 712
 713                 if (status & ISR_GPHY)  /* clear phy status */
 714                         atl1_clear_phy_int(adapter);
 715
 716                 /* clear ISR status, and Enable CMB DMA/Disable Interrupt */
 717                 iowrite32(status | ISR_DIS_INT, adapter->hw.hw_addr + REG_ISR);
 718
 719                 /* check if SMB intr */
 720                 if (status & ISR_SMB)
 721                         atl1_inc_smb(adapter);
 722
 723                 /* check if PCIE PHY Link down */
 724                 if (status & ISR_PHY_LINKDOWN) {
 725                         dev_printk(KERN_DEBUG, &adapter->pdev->dev,
 726                                 "pcie phy link down %x\n", status);
 727                         if (netif_running(adapter->netdev)) {   /* reset MAC */
 728                                 iowrite32(0, adapter->hw.hw_addr + REG_IMR);
 729                                 schedule_work(&adapter->pcie_dma_to_rst_task);
 730                                 return IRQ_HANDLED;
 731                         }
 732                 }
 733
 734                 /* check if DMA read/write error ? */
 735                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
 736                         dev_printk(KERN_DEBUG, &adapter->pdev->dev,
 737                                 "pcie DMA r/w error (status = 0x%x)\n",
 738                                 status);
 739                         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
 740                         schedule_work(&adapter->pcie_dma_to_rst_task);
 741                         return IRQ_HANDLED;
 742                 }
 743
 744                 /* link event */
 745                 if (status & ISR_GPHY) {
 746                         adapter->soft_stats.tx_carrier_errors++;
 747                         atl1_check_for_link(adapter);
 748                 }
 749
 750                 /* transmit event */
 751                 if (status & ISR_CMB_TX)
 752                         atl1_intr_tx(adapter);
 753
 754                 /* rx exception */
 755                 if (unlikely(status & (ISR_RXF_OV | ISR_RFD_UNRUN |
 756                         ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
 757                         ISR_HOST_RRD_OV | ISR_CMB_RX))) {
 758                         if (status & (ISR_RXF_OV | ISR_RFD_UNRUN |
 759                                 ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
 760                                 ISR_HOST_RRD_OV))
 761                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
 762                                         "rx exception, ISR = 0x%x\n", status);
 763                         atl1_intr_rx(adapter);
 764                 }
 765
 766                 if (--max_ints < 0)
 767                         break;
 768
 769         } while ((status = adapter->cmb.cmb->int_stats));
 770
 771         /* re-enable Interrupt */
 772         iowrite32(ISR_DIS_SMB | ISR_DIS_DMA, adapter->hw.hw_addr + REG_ISR);
 773         return IRQ_HANDLED;
 774 }
 775
 776 /*
 777  * atl1_set_multi - Multicast and Promiscuous mode set
 778  * @netdev: network interface device structure
 779  *
 780  * The set_multi entry point is called whenever the multicast address
 781  * list or the network interface flags are updated.  This routine is
 782  * responsible for configuring the hardware for proper multicast,
 783  * promiscuous mode, and all-multi behavior.
 784  */
 785 static void atl1_set_multi(struct net_device *netdev)
 786 {
 787         struct atl1_adapter *adapter = netdev_priv(netdev);
 788         struct atl1_hw *hw = &adapter->hw;
 789         struct dev_mc_list *mc_ptr;
 790         u32 rctl;
 791         u32 hash_value;
 792
 793         /* Check for Promiscuous and All Multicast modes */
 794         rctl = ioread32(hw->hw_addr + REG_MAC_CTRL);
 795         if (netdev->flags & IFF_PROMISC)
 796                 rctl |= MAC_CTRL_PROMIS_EN;
 797         else if (netdev->flags & IFF_ALLMULTI) {
 798                 rctl |= MAC_CTRL_MC_ALL_EN;
 799                 rctl &= ~MAC_CTRL_PROMIS_EN;
 800         } else
 801                 rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 802
 803         iowrite32(rctl, hw->hw_addr + REG_MAC_CTRL);
 804
 805         /* clear the old settings from the multicast hash table */
 806         iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
 807         iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
 808
 809         /* compute mc addresses' hash value ,and put it into hash table */
 810         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 811                 hash_value = atl1_hash_mc_addr(hw, mc_ptr->dmi_addr);
 812                 atl1_hash_set(hw, hash_value);
 813         }
 814 }
 815
 816 static void atl1_setup_mac_ctrl(struct atl1_adapter *adapter)
 817 {
 818         u32 value;
 819         struct atl1_hw *hw = &adapter->hw;
 820         struct net_device *netdev = adapter->netdev;
 821         /* Config MAC CTRL Register */
 822         value = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
 823         /* duplex */
 824         if (FULL_DUPLEX == adapter->link_duplex)
 825                 value |= MAC_CTRL_DUPLX;
 826         /* speed */
 827         value |= ((u32) ((SPEED_1000 == adapter->link_speed) ?
 828                          MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
 829                   MAC_CTRL_SPEED_SHIFT);
 830         /* flow control */
 831         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
 832         /* PAD & CRC */
 833         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
 834         /* preamble length */
 835         value |= (((u32) adapter->hw.preamble_len
 836                    & MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
 837         /* vlan */
 838         if (adapter->vlgrp)
 839                 value |= MAC_CTRL_RMV_VLAN;
 840         /* rx checksum
 841            if (adapter->rx_csum)
 842            value |= MAC_CTRL_RX_CHKSUM_EN;
 843          */
 844         /* filter mode */
 845         value |= MAC_CTRL_BC_EN;
 846         if (netdev->flags & IFF_PROMISC)
 847                 value |= MAC_CTRL_PROMIS_EN;
 848         else if (netdev->flags & IFF_ALLMULTI)
 849                 value |= MAC_CTRL_MC_ALL_EN;
 850         /* value |= MAC_CTRL_LOOPBACK; */
 851         iowrite32(value, hw->hw_addr + REG_MAC_CTRL);
 852 }
 853
 854 static u32 atl1_check_link(struct atl1_adapter *adapter)
 855 {
 856         struct atl1_hw *hw = &adapter->hw;
 857         struct net_device *netdev = adapter->netdev;
 858         u32 ret_val;
 859         u16 speed, duplex, phy_data;
 860         int reconfig = 0;
 861
 862         /* MII_BMSR must read twice */
 863         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
 864         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
 865         if (!(phy_data & BMSR_LSTATUS)) {       /* link down */
 866                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 867                         dev_info(&adapter->pdev->dev, "link is down\n");
 868                         adapter->link_speed = SPEED_0;
 869                         netif_carrier_off(netdev);
 870                         netif_stop_queue(netdev);
 871                 }
 872                 return ATL1_SUCCESS;
 873         }
 874
 875         /* Link Up */
 876         ret_val = atl1_get_speed_and_duplex(hw, &speed, &duplex);
 877         if (ret_val)
 878                 return ret_val;
 879
 880         switch (hw->media_type) {
 881         case MEDIA_TYPE_1000M_FULL:
 882                 if (speed != SPEED_1000 || duplex != FULL_DUPLEX)
 883                         reconfig = 1;
 884                 break;
 885         case MEDIA_TYPE_100M_FULL:
 886                 if (speed != SPEED_100 || duplex != FULL_DUPLEX)
 887                         reconfig = 1;
 888                 break;
 889         case MEDIA_TYPE_100M_HALF:
 890                 if (speed != SPEED_100 || duplex != HALF_DUPLEX)
 891                         reconfig = 1;
 892                 break;
 893         case MEDIA_TYPE_10M_FULL:
 894                 if (speed != SPEED_10 || duplex != FULL_DUPLEX)
 895                         reconfig = 1;
 896                 break;
 897         case MEDIA_TYPE_10M_HALF:
 898                 if (speed != SPEED_10 || duplex != HALF_DUPLEX)
 899                         reconfig = 1;
 900                 break;
 901         }
 902
 903         /* link result is our setting */
 904         if (!reconfig) {
 905                 if (adapter->link_speed != speed
 906                     || adapter->link_duplex != duplex) {
 907                         adapter->link_speed = speed;
 908                         adapter->link_duplex = duplex;
 909                         atl1_setup_mac_ctrl(adapter);
 910                         dev_info(&adapter->pdev->dev,
 911                                 "%s link is up %d Mbps %s\n",
 912                                 netdev->name, adapter->link_speed,
 913                                 adapter->link_duplex == FULL_DUPLEX ?
 914                                 "full duplex" : "half duplex");
 915                 }
 916                 if (!netif_carrier_ok(netdev)) {        /* Link down -> Up */
 917                         netif_carrier_on(netdev);
 918                         netif_wake_queue(netdev);
 919                 }
 920                 return ATL1_SUCCESS;
 921         }
 922
 923         /* change orignal link status */
 924         if (netif_carrier_ok(netdev)) {
 925                 adapter->link_speed = SPEED_0;
 926                 netif_carrier_off(netdev);
 927                 netif_stop_queue(netdev);
 928         }
 929
 930         if (hw->media_type != MEDIA_TYPE_AUTO_SENSOR &&
 931             hw->media_type != MEDIA_TYPE_1000M_FULL) {
 932                 switch (hw->media_type) {
 933                 case MEDIA_TYPE_100M_FULL:
 934                         phy_data = MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
 935                                    MII_CR_RESET;
 936                         break;
 937                 case MEDIA_TYPE_100M_HALF:
 938                         phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
 939                         break;
 940                 case MEDIA_TYPE_10M_FULL:
 941                         phy_data =
 942                             MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
 943                         break;
 944                 default:        /* MEDIA_TYPE_10M_HALF: */
 945                         phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
 946                         break;
 947                 }
 948                 atl1_write_phy_reg(hw, MII_BMCR, phy_data);
 949                 return ATL1_SUCCESS;
 950         }
 951
 952         /* auto-neg, insert timer to re-config phy */
 953         if (!adapter->phy_timer_pending) {
 954                 adapter->phy_timer_pending = true;
 955                 mod_timer(&adapter->phy_config_timer, jiffies + 3 * HZ);
 956         }
 957
 958         return ATL1_SUCCESS;
 959 }
 960
 961 static void set_flow_ctrl_old(struct atl1_adapter *adapter)
 962 {
 963         u32 hi, lo, value;
 964
 965         /* RFD Flow Control */
 966         value = adapter->rfd_ring.count;
 967         hi = value / 16;
 968         if (hi < 2)
 969                 hi = 2;
 970         lo = value * 7 / 8;
 971
 972         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 973                 ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 974         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
 975
 976         /* RRD Flow Control */
 977         value = adapter->rrd_ring.count;
 978         lo = value / 16;
 979         hi = value * 7 / 8;
 980         if (lo < 2)
 981                 lo = 2;
 982         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
 983                 ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
 984         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
 985 }
 986
 987 static void set_flow_ctrl_new(struct atl1_hw *hw)
 988 {
 989         u32 hi, lo, value;
 990
 991         /* RXF Flow Control */
 992         value = ioread32(hw->hw_addr + REG_SRAM_RXF_LEN);
 993         lo = value / 16;
 994         if (lo < 192)
 995                 lo = 192;
 996         hi = value * 7 / 8;
 997         if (hi < lo)
 998                 hi = lo + 16;
 999         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1000                 ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1001         iowrite32(value, hw->hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
1002
1003         /* RRD Flow Control */
1004         value = ioread32(hw->hw_addr + REG_SRAM_RRD_LEN);
1005         lo = value / 8;
1006         hi = value * 7 / 8;
1007         if (lo < 2)
1008                 lo = 2;
1009         if (hi < lo)
1010                 hi = lo + 3;
1011         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
1012                 ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
1013         iowrite32(value, hw->hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
1014 }
1015
1016 /*
1017  * atl1_configure - Configure Transmit&Receive Unit after Reset
1018  * @adapter: board private structure
1019  *
1020  * Configure the Tx /Rx unit of the MAC after a reset.
1021  */
1022 static u32 atl1_configure(struct atl1_adapter *adapter)
1023 {
1024         struct atl1_hw *hw = &adapter->hw;
1025         u32 value;
1026
1027         /* clear interrupt status */
1028         iowrite32(0xffffffff, adapter->hw.hw_addr + REG_ISR);
1029
1030         /* set MAC Address */
1031         value = (((u32) hw->mac_addr[2]) << 24) |
1032                 (((u32) hw->mac_addr[3]) << 16) |
1033                 (((u32) hw->mac_addr[4]) << 8) |
1034                 (((u32) hw->mac_addr[5]));
1035         iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
1036         value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
1037         iowrite32(value, hw->hw_addr + (REG_MAC_STA_ADDR + 4));
1038
1039         /* tx / rx ring */
1040
1041         /* HI base address */
1042         iowrite32((u32) ((adapter->tpd_ring.dma & 0xffffffff00000000ULL) >> 32),
1043                 hw->hw_addr + REG_DESC_BASE_ADDR_HI);
1044         /* LO base address */
1045         iowrite32((u32) (adapter->rfd_ring.dma & 0x00000000ffffffffULL),
1046                 hw->hw_addr + REG_DESC_RFD_ADDR_LO);
1047         iowrite32((u32) (adapter->rrd_ring.dma & 0x00000000ffffffffULL),
1048                 hw->hw_addr + REG_DESC_RRD_ADDR_LO);
1049         iowrite32((u32) (adapter->tpd_ring.dma & 0x00000000ffffffffULL),
1050                 hw->hw_addr + REG_DESC_TPD_ADDR_LO);
1051         iowrite32((u32) (adapter->cmb.dma & 0x00000000ffffffffULL),
1052                 hw->hw_addr + REG_DESC_CMB_ADDR_LO);
1053         iowrite32((u32) (adapter->smb.dma & 0x00000000ffffffffULL),
1054                 hw->hw_addr + REG_DESC_SMB_ADDR_LO);
1055
1056         /* element count */
1057         value = adapter->rrd_ring.count;
1058         value <<= 16;
1059         value += adapter->rfd_ring.count;
1060         iowrite32(value, hw->hw_addr + REG_DESC_RFD_RRD_RING_SIZE);
1061         iowrite32(adapter->tpd_ring.count, hw->hw_addr + REG_DESC_TPD_RING_SIZE);
1062
1063         /* Load Ptr */
1064         iowrite32(1, hw->hw_addr + REG_LOAD_PTR);
1065
1066         /* config Mailbox */
1067         value = ((atomic_read(&adapter->tpd_ring.next_to_use)
1068                   & MB_TPD_PROD_INDX_MASK) << MB_TPD_PROD_INDX_SHIFT) |
1069                 ((atomic_read(&adapter->rrd_ring.next_to_clean)
1070                 & MB_RRD_CONS_INDX_MASK) << MB_RRD_CONS_INDX_SHIFT) |
1071                 ((atomic_read(&adapter->rfd_ring.next_to_use)
1072                 & MB_RFD_PROD_INDX_MASK) << MB_RFD_PROD_INDX_SHIFT);
1073         iowrite32(value, hw->hw_addr + REG_MAILBOX);
1074
1075         /* config IPG/IFG */
1076         value = (((u32) hw->ipgt & MAC_IPG_IFG_IPGT_MASK)
1077                  << MAC_IPG_IFG_IPGT_SHIFT) |
1078                 (((u32) hw->min_ifg & MAC_IPG_IFG_MIFG_MASK)
1079                 << MAC_IPG_IFG_MIFG_SHIFT) |
1080                 (((u32) hw->ipgr1 & MAC_IPG_IFG_IPGR1_MASK)
1081                 << MAC_IPG_IFG_IPGR1_SHIFT) |
1082                 (((u32) hw->ipgr2 & MAC_IPG_IFG_IPGR2_MASK)
1083                 << MAC_IPG_IFG_IPGR2_SHIFT);
1084         iowrite32(value, hw->hw_addr + REG_MAC_IPG_IFG);
1085
1086         /* config  Half-Duplex Control */
1087         value = ((u32) hw->lcol & MAC_HALF_DUPLX_CTRL_LCOL_MASK) |
1088                 (((u32) hw->max_retry & MAC_HALF_DUPLX_CTRL_RETRY_MASK)
1089                 << MAC_HALF_DUPLX_CTRL_RETRY_SHIFT) |
1090                 MAC_HALF_DUPLX_CTRL_EXC_DEF_EN |
1091                 (0xa << MAC_HALF_DUPLX_CTRL_ABEBT_SHIFT) |
1092                 (((u32) hw->jam_ipg & MAC_HALF_DUPLX_CTRL_JAMIPG_MASK)
1093                 << MAC_HALF_DUPLX_CTRL_JAMIPG_SHIFT);
1094         iowrite32(value, hw->hw_addr + REG_MAC_HALF_DUPLX_CTRL);
1095
1096         /* set Interrupt Moderator Timer */
1097         iowrite16(adapter->imt, hw->hw_addr + REG_IRQ_MODU_TIMER_INIT);
1098         iowrite32(MASTER_CTRL_ITIMER_EN, hw->hw_addr + REG_MASTER_CTRL);
1099
1100         /* set Interrupt Clear Timer */
1101         iowrite16(adapter->ict, hw->hw_addr + REG_CMBDISDMA_TIMER);
1102
1103         /* set MTU, 4 : VLAN */
1104         iowrite32(hw->max_frame_size + 4, hw->hw_addr + REG_MTU);
1105
1106         /* jumbo size & rrd retirement timer */
1107         value = (((u32) hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK)
1108                  << RXQ_JMBOSZ_TH_SHIFT) |
1109                 (((u32) hw->rx_jumbo_lkah & RXQ_JMBO_LKAH_MASK)
1110                 << RXQ_JMBO_LKAH_SHIFT) |
1111                 (((u32) hw->rrd_ret_timer & RXQ_RRD_TIMER_MASK)
1112                 << RXQ_RRD_TIMER_SHIFT);
1113         iowrite32(value, hw->hw_addr + REG_RXQ_JMBOSZ_RRDTIM);
1114
1115         /* Flow Control */
1116         switch (hw->dev_rev) {
1117         case 0x8001:
1118         case 0x9001:
1119         case 0x9002:
1120         case 0x9003:
1121                 set_flow_ctrl_old(adapter);
1122                 break;
1123         default:
1124                 set_flow_ctrl_new(hw);
1125                 break;
1126         }
1127
1128         /* config TXQ */
1129         value = (((u32) hw->tpd_burst & TXQ_CTRL_TPD_BURST_NUM_MASK)
1130                  << TXQ_CTRL_TPD_BURST_NUM_SHIFT) |
1131                 (((u32) hw->txf_burst & TXQ_CTRL_TXF_BURST_NUM_MASK)
1132                 << TXQ_CTRL_TXF_BURST_NUM_SHIFT) |
1133                 (((u32) hw->tpd_fetch_th & TXQ_CTRL_TPD_FETCH_TH_MASK)
1134                 << TXQ_CTRL_TPD_FETCH_TH_SHIFT) | TXQ_CTRL_ENH_MODE |
1135                 TXQ_CTRL_EN;
1136         iowrite32(value, hw->hw_addr + REG_TXQ_CTRL);
1137
1138         /* min tpd fetch gap & tx jumbo packet size threshold for taskoffload */
1139         value = (((u32) hw->tx_jumbo_task_th & TX_JUMBO_TASK_TH_MASK)
1140                 << TX_JUMBO_TASK_TH_SHIFT) |
1141                 (((u32) hw->tpd_fetch_gap & TX_TPD_MIN_IPG_MASK)
1142                 << TX_TPD_MIN_IPG_SHIFT);
1143         iowrite32(value, hw->hw_addr + REG_TX_JUMBO_TASK_TH_TPD_IPG);
1144
1145         /* config RXQ */
1146         value = (((u32) hw->rfd_burst & RXQ_CTRL_RFD_BURST_NUM_MASK)
1147                 << RXQ_CTRL_RFD_BURST_NUM_SHIFT) |
1148                 (((u32) hw->rrd_burst & RXQ_CTRL_RRD_BURST_THRESH_MASK)
1149                 << RXQ_CTRL_RRD_BURST_THRESH_SHIFT) |
1150                 (((u32) hw->rfd_fetch_gap & RXQ_CTRL_RFD_PREF_MIN_IPG_MASK)
1151                 << RXQ_CTRL_RFD_PREF_MIN_IPG_SHIFT) | RXQ_CTRL_CUT_THRU_EN |
1152                 RXQ_CTRL_EN;
1153         iowrite32(value, hw->hw_addr + REG_RXQ_CTRL);
1154
1155         /* config DMA Engine */
1156         value = ((((u32) hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1157                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
1158                 ((((u32) hw->dmaw_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1159                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT) | DMA_CTRL_DMAR_EN |
1160                 DMA_CTRL_DMAW_EN;
1161         value |= (u32) hw->dma_ord;
1162         if (atl1_rcb_128 == hw->rcb_value)
1163                 value |= DMA_CTRL_RCB_VALUE;
1164         iowrite32(value, hw->hw_addr + REG_DMA_CTRL);
1165
1166         /* config CMB / SMB */
1167         value = hw->cmb_rrd | ((u32) hw->cmb_tpd << 16);
1168         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TH);
1169         value = hw->cmb_rx_timer | ((u32) hw->cmb_tx_timer << 16);
1170         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TIMER);
1171         iowrite32(hw->smb_timer, hw->hw_addr + REG_SMB_TIMER);
1172
1173         /* --- enable CMB / SMB */
1174         value = CSMB_CTRL_CMB_EN | CSMB_CTRL_SMB_EN;
1175         iowrite32(value, hw->hw_addr + REG_CSMB_CTRL);
1176
1177         value = ioread32(adapter->hw.hw_addr + REG_ISR);
1178         if (unlikely((value & ISR_PHY_LINKDOWN) != 0))
1179                 value = 1;      /* config failed */
1180         else
1181                 value = 0;
1182
1183         /* clear all interrupt status */
1184         iowrite32(0x3fffffff, adapter->hw.hw_addr + REG_ISR);
1185         iowrite32(0, adapter->hw.hw_addr + REG_ISR);
1186         return value;
1187 }
1188
1189 /*
1190  * atl1_irq_disable - Mask off interrupt generation on the NIC
1191  * @adapter: board private structure
1192  */
1193 static void atl1_irq_disable(struct atl1_adapter *adapter)
1194 {
1195         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
1196         ioread32(adapter->hw.hw_addr + REG_IMR);
1197         synchronize_irq(adapter->pdev->irq);
1198 }
1199
1200 static void atl1_vlan_rx_register(struct net_device *netdev,
1201         struct vlan_group *grp)
1202 {
1203         struct atl1_adapter *adapter = netdev_priv(netdev);
1204         unsigned long flags;
1205         u32 ctrl;
1206
1207         spin_lock_irqsave(&adapter->lock, flags);
1208         /* atl1_irq_disable(adapter); */
1209         adapter->vlgrp = grp;
1210
1211         if (grp) {
1212                 /* enable VLAN tag insert/strip */
1213                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
1214                 ctrl |= MAC_CTRL_RMV_VLAN;
1215                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
1216         } else {
1217                 /* disable VLAN tag insert/strip */
1218                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
1219                 ctrl &= ~MAC_CTRL_RMV_VLAN;
1220                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
1221         }
1222
1223         /* atl1_irq_enable(adapter); */
1224         spin_unlock_irqrestore(&adapter->lock, flags);
1225 }
1226
1227 static void atl1_restore_vlan(struct atl1_adapter *adapter)
1228 {
1229         atl1_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1230 }
1231
1232 static u16 tpd_avail(struct atl1_tpd_ring *tpd_ring)
1233 {
1234         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1235         u16 next_to_use = atomic_read(&tpd_ring->next_to_use);
1236         return ((next_to_clean > next_to_use) ?
1237                 next_to_clean - next_to_use - 1 :
1238                 tpd_ring->count + next_to_clean - next_to_use - 1);
1239 }
1240
1241 static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
1242                          struct tso_param *tso)
1243 {
1244         /* We enter this function holding a spinlock. */
1245         u8 ipofst;
1246         int err;
1247
1248         if (skb_shinfo(skb)->gso_size) {
1249                 if (skb_header_cloned(skb)) {
1250                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1251                         if (unlikely(err))
1252                                 return err;
1253                 }
1254
1255                 if (skb->protocol == ntohs(ETH_P_IP)) {
1256                         struct iphdr *iph = ip_hdr(skb);
1257
1258                         iph->tot_len = 0;
1259                         iph->check = 0;
1260                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1261                                                                  iph->daddr, 0,
1262                                                                  IPPROTO_TCP,
1263                                                                  0);
1264                         ipofst = skb_network_offset(skb);
1265                         if (ipofst != ENET_HEADER_SIZE) /* 802.3 frame */
1266                                 tso->tsopl |= 1 << TSO_PARAM_ETHTYPE_SHIFT;
1267
1268                         tso->tsopl |= (iph->ihl &
1269                                 CSUM_PARAM_IPHL_MASK) << CSUM_PARAM_IPHL_SHIFT;
1270                         tso->tsopl |= (tcp_hdrlen(skb) &
1271                                 TSO_PARAM_TCPHDRLEN_MASK) <<
1272                                 TSO_PARAM_TCPHDRLEN_SHIFT;
1273                         tso->tsopl |= (skb_shinfo(skb)->gso_size &
1274                                 TSO_PARAM_MSS_MASK) << TSO_PARAM_MSS_SHIFT;
1275                         tso->tsopl |= 1 << TSO_PARAM_IPCKSUM_SHIFT;
1276                         tso->tsopl |= 1 << TSO_PARAM_TCPCKSUM_SHIFT;
1277                         tso->tsopl |= 1 << TSO_PARAM_SEGMENT_SHIFT;
1278                         return true;
1279                 }
1280         }
1281         return false;
1282 }
1283
1284 static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
1285         struct csum_param *csum)
1286 {
1287         u8 css, cso;
1288
1289         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1290                 cso = skb_transport_offset(skb);
1291                 css = cso + skb->csum_offset;
1292                 if (unlikely(cso & 0x1)) {
1293                         dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1294                                 "payload offset not an even number\n");
1295                         return -1;
1296                 }
1297                 csum->csumpl |= (cso & CSUM_PARAM_PLOADOFFSET_MASK) <<
1298                         CSUM_PARAM_PLOADOFFSET_SHIFT;
1299                 csum->csumpl |= (css & CSUM_PARAM_XSUMOFFSET_MASK) <<
1300                         CSUM_PARAM_XSUMOFFSET_SHIFT;
1301                 csum->csumpl |= 1 << CSUM_PARAM_CUSTOMCKSUM_SHIFT;
1302                 return true;
1303         }
1304
1305         return true;
1306 }
1307
1308 static void atl1_tx_map(struct atl1_adapter *adapter, struct sk_buff *skb,
1309         bool tcp_seg)
1310 {
1311         /* We enter this function holding a spinlock. */
1312         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1313         struct atl1_buffer *buffer_info;
1314         struct page *page;
1315         int first_buf_len = skb->len;
1316         unsigned long offset;
1317         unsigned int nr_frags;
1318         unsigned int f;
1319         u16 tpd_next_to_use;
1320         u16 proto_hdr_len;
1321         u16 i, m, len12;
1322
1323         first_buf_len -= skb->data_len;
1324         nr_frags = skb_shinfo(skb)->nr_frags;
1325         tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
1326         buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1327         if (unlikely(buffer_info->skb))
1328                 BUG();
1329         buffer_info->skb = NULL;        /* put skb in last TPD */
1330
1331         if (tcp_seg) {
1332                 /* TSO/GSO */
1333                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1334                 buffer_info->length = proto_hdr_len;
1335                 page = virt_to_page(skb->data);
1336                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1337                 buffer_info->dma = pci_map_page(adapter->pdev, page,
1338                                                 offset, proto_hdr_len,
1339                                                 PCI_DMA_TODEVICE);
1340
1341                 if (++tpd_next_to_use == tpd_ring->count)
1342                         tpd_next_to_use = 0;
1343
1344                 if (first_buf_len > proto_hdr_len) {
1345                         len12 = first_buf_len - proto_hdr_len;
1346                         m = (len12 + ATL1_MAX_TX_BUF_LEN - 1) /
1347                                 ATL1_MAX_TX_BUF_LEN;
1348                         for (i = 0; i < m; i++) {
1349                                 buffer_info =
1350                                     &tpd_ring->buffer_info[tpd_next_to_use];
1351                                 buffer_info->skb = NULL;
1352                                 buffer_info->length =
1353                                     (ATL1_MAX_TX_BUF_LEN >=
1354                                      len12) ? ATL1_MAX_TX_BUF_LEN : len12;
1355                                 len12 -= buffer_info->length;
1356                                 page = virt_to_page(skb->data +
1357                                         (proto_hdr_len +
1358                                         i * ATL1_MAX_TX_BUF_LEN));
1359                                 offset = (unsigned long)(skb->data +
1360                                         (proto_hdr_len +
1361                                         i * ATL1_MAX_TX_BUF_LEN)) & ~PAGE_MASK;
1362                                 buffer_info->dma = pci_map_page(adapter->pdev,
1363                                         page, offset, buffer_info->length,
1364                                         PCI_DMA_TODEVICE);
1365                                 if (++tpd_next_to_use == tpd_ring->count)
1366                                         tpd_next_to_use = 0;
1367                         }
1368                 }
1369         } else {
1370                 /* not TSO/GSO */
1371                 buffer_info->length = first_buf_len;
1372                 page = virt_to_page(skb->data);
1373                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1374                 buffer_info->dma = pci_map_page(adapter->pdev, page,
1375                         offset, first_buf_len, PCI_DMA_TODEVICE);
1376                 if (++tpd_next_to_use == tpd_ring->count)
1377                         tpd_next_to_use = 0;
1378         }
1379
1380         for (f = 0; f < nr_frags; f++) {
1381                 struct skb_frag_struct *frag;
1382                 u16 lenf, i, m;
1383
1384                 frag = &skb_shinfo(skb)->frags[f];
1385                 lenf = frag->size;
1386
1387                 m = (lenf + ATL1_MAX_TX_BUF_LEN - 1) / ATL1_MAX_TX_BUF_LEN;
1388                 for (i = 0; i < m; i++) {
1389                         buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1390                         if (unlikely(buffer_info->skb))
1391                                 BUG();
1392                         buffer_info->skb = NULL;
1393                         buffer_info->length = (lenf > ATL1_MAX_TX_BUF_LEN) ?
1394                                 ATL1_MAX_TX_BUF_LEN : lenf;
1395                         lenf -= buffer_info->length;
1396                         buffer_info->dma = pci_map_page(adapter->pdev,
1397                                 frag->page,
1398                                 frag->page_offset + (i * ATL1_MAX_TX_BUF_LEN),
1399                                 buffer_info->length, PCI_DMA_TODEVICE);
1400
1401                         if (++tpd_next_to_use == tpd_ring->count)
1402                                 tpd_next_to_use = 0;
1403                 }
1404         }
1405
1406         /* last tpd's buffer-info */
1407         buffer_info->skb = skb;
1408 }
1409
1410 static void atl1_tx_queue(struct atl1_adapter *adapter, int count,
1411        union tpd_descr *descr)
1412 {
1413         /* We enter this function holding a spinlock. */
1414         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1415         int j;
1416         u32 val;
1417         struct atl1_buffer *buffer_info;
1418         struct tx_packet_desc *tpd;
1419         u16 tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
1420
1421         for (j = 0; j < count; j++) {
1422                 buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1423                 tpd = ATL1_TPD_DESC(&adapter->tpd_ring, tpd_next_to_use);
1424                 tpd->desc.csum.csumpu = descr->csum.csumpu;
1425                 tpd->desc.csum.csumpl = descr->csum.csumpl;
1426                 tpd->desc.tso.tsopu = descr->tso.tsopu;
1427                 tpd->desc.tso.tsopl = descr->tso.tsopl;
1428                 tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1429                 tpd->desc.data = descr->data;
1430                 tpd->desc.csum.csumpu |= (cpu_to_le16(buffer_info->length) &
1431                         CSUM_PARAM_BUFLEN_MASK) << CSUM_PARAM_BUFLEN_SHIFT;
1432
1433                 val = (descr->tso.tsopl >> TSO_PARAM_SEGMENT_SHIFT) &
1434                         TSO_PARAM_SEGMENT_MASK;
1435                 if (val && !j)
1436                         tpd->desc.tso.tsopl |= 1 << TSO_PARAM_HDRFLAG_SHIFT;
1437
1438                 if (j == (count - 1))
1439                         tpd->desc.csum.csumpl |= 1 << CSUM_PARAM_EOP_SHIFT;
1440
1441                 if (++tpd_next_to_use == tpd_ring->count)
1442                         tpd_next_to_use = 0;
1443         }
1444         /*
1445          * Force memory writes to complete before letting h/w
1446          * know there are new descriptors to fetch.  (Only
1447          * applicable for weak-ordered memory model archs,
1448          * such as IA-64).
1449          */
1450         wmb();
1451
1452         atomic_set(&tpd_ring->next_to_use, (int)tpd_next_to_use);
1453 }
1454
1455 static void atl1_update_mailbox(struct atl1_adapter *adapter)
1456 {
1457         unsigned long flags;
1458         u32 tpd_next_to_use;
1459         u32 rfd_next_to_use;
1460         u32 rrd_next_to_clean;
1461         u32 value;
1462
1463         spin_lock_irqsave(&adapter->mb_lock, flags);
1464
1465         tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
1466         rfd_next_to_use = atomic_read(&adapter->rfd_ring.next_to_use);
1467         rrd_next_to_clean = atomic_read(&adapter->rrd_ring.next_to_clean);
1468
1469         value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
1470                 MB_RFD_PROD_INDX_SHIFT) |
1471                 ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
1472                 MB_RRD_CONS_INDX_SHIFT) |
1473                 ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
1474                 MB_TPD_PROD_INDX_SHIFT);
1475         iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
1476
1477         spin_unlock_irqrestore(&adapter->mb_lock, flags);
1478 }
1479
1480 static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1481 {
1482         struct atl1_adapter *adapter = netdev_priv(netdev);
1483         int len = skb->len;
1484         int tso;
1485         int count = 1;
1486         int ret_val;
1487         u32 val;
1488         union tpd_descr param;
1489         u16 frag_size;
1490         u16 vlan_tag;
1491         unsigned long flags;
1492         unsigned int nr_frags = 0;
1493         unsigned int mss = 0;
1494         unsigned int f;
1495         unsigned int proto_hdr_len;
1496
1497         len -= skb->data_len;
1498
1499         if (unlikely(skb->len == 0)) {
1500                 dev_kfree_skb_any(skb);
1501                 return NETDEV_TX_OK;
1502         }
1503
1504         param.data = 0;
1505         param.tso.tsopu = 0;
1506         param.tso.tsopl = 0;
1507         param.csum.csumpu = 0;
1508         param.csum.csumpl = 0;
1509
1510         /* nr_frags will be nonzero if we're doing scatter/gather (SG) */
1511         nr_frags = skb_shinfo(skb)->nr_frags;
1512         for (f = 0; f < nr_frags; f++) {
1513                 frag_size = skb_shinfo(skb)->frags[f].size;
1514                 if (frag_size)
1515                         count += (frag_size + ATL1_MAX_TX_BUF_LEN - 1) /
1516                                 ATL1_MAX_TX_BUF_LEN;
1517         }
1518
1519         /* mss will be nonzero if we're doing segment offload (TSO/GSO) */
1520         mss = skb_shinfo(skb)->gso_size;
1521         if (mss) {
1522                 if (skb->protocol == htons(ETH_P_IP)) {
1523                         proto_hdr_len = (skb_transport_offset(skb) +
1524                                          tcp_hdrlen(skb));
1525                         if (unlikely(proto_hdr_len > len)) {
1526                                 dev_kfree_skb_any(skb);
1527                                 return NETDEV_TX_OK;
1528                         }
1529                         /* need additional TPD ? */
1530                         if (proto_hdr_len != len)
1531                                 count += (len - proto_hdr_len +
1532                                         ATL1_MAX_TX_BUF_LEN - 1) /
1533                                         ATL1_MAX_TX_BUF_LEN;
1534                 }
1535         }
1536
1537         local_irq_save(flags);
1538         if (!spin_trylock(&adapter->lock)) {
1539                 /* Can't get lock - tell upper layer to requeue */
1540                 local_irq_restore(flags);
1541                 dev_printk(KERN_DEBUG, &adapter->pdev->dev, "tx locked\n");
1542                 return NETDEV_TX_LOCKED;
1543         }
1544
1545         if (tpd_avail(&adapter->tpd_ring) < count) {
1546                 /* not enough descriptors */
1547                 netif_stop_queue(netdev);
1548                 spin_unlock_irqrestore(&adapter->lock, flags);
1549                 dev_printk(KERN_DEBUG, &adapter->pdev->dev, "tx busy\n");
1550                 return NETDEV_TX_BUSY;
1551         }
1552
1553         param.data = 0;
1554
1555         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1556                 vlan_tag = vlan_tx_tag_get(skb);
1557                 vlan_tag = (vlan_tag << 4) | (vlan_tag >> 13) |
1558                         ((vlan_tag >> 9) & 0x8);
1559                 param.csum.csumpl |= 1 << CSUM_PARAM_INSVLAG_SHIFT;
1560                 param.csum.csumpu |= (vlan_tag & CSUM_PARAM_VALANTAG_MASK) <<
1561                         CSUM_PARAM_VALAN_SHIFT;
1562         }
1563
1564         tso = atl1_tso(adapter, skb, &param.tso);
1565         if (tso < 0) {
1566                 spin_unlock_irqrestore(&adapter->lock, flags);
1567                 dev_kfree_skb_any(skb);
1568                 return NETDEV_TX_OK;
1569         }
1570
1571         if (!tso) {
1572                 ret_val = atl1_tx_csum(adapter, skb, &param.csum);
1573                 if (ret_val < 0) {
1574                         spin_unlock_irqrestore(&adapter->lock, flags);
1575                         dev_kfree_skb_any(skb);
1576                         return NETDEV_TX_OK;
1577                 }
1578         }
1579
1580         val = (param.csum.csumpl >> CSUM_PARAM_SEGMENT_SHIFT) &
1581                 CSUM_PARAM_SEGMENT_MASK;
1582         atl1_tx_map(adapter, skb, 1 == val);
1583         atl1_tx_queue(adapter, count, &param);
1584         netdev->trans_start = jiffies;
1585         spin_unlock_irqrestore(&adapter->lock, flags);
1586         atl1_update_mailbox(adapter);
1587         return NETDEV_TX_OK;
1588 }
1589
1590 /*
1591  * atl1_get_stats - Get System Network Statistics
1592  * @netdev: network interface device structure
1593  *
1594  * Returns the address of the device statistics structure.
1595  * The statistics are actually updated from the timer callback.
1596  */
1597 static struct net_device_stats *atl1_get_stats(struct net_device *netdev)
1598 {
1599         struct atl1_adapter *adapter = netdev_priv(netdev);
1600         return &adapter->net_stats;
1601 }
1602
1603 /*
1604  * atl1_clean_rx_ring - Free RFD Buffers
1605  * @adapter: board private structure
1606  */
1607 static void atl1_clean_rx_ring(struct atl1_adapter *adapter)
1608 {
1609         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1610         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1611         struct atl1_buffer *buffer_info;
1612         struct pci_dev *pdev = adapter->pdev;
1613         unsigned long size;
1614         unsigned int i;
1615
1616         /* Free all the Rx ring sk_buffs */
1617         for (i = 0; i < rfd_ring->count; i++) {
1618                 buffer_info = &rfd_ring->buffer_info[i];
1619                 if (buffer_info->dma) {
1620                         pci_unmap_page(pdev, buffer_info->dma,
1621                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1622                         buffer_info->dma = 0;
1623                 }
1624                 if (buffer_info->skb) {
1625                         dev_kfree_skb(buffer_info->skb);
1626                         buffer_info->skb = NULL;
1627                 }
1628         }
1629
1630         size = sizeof(struct atl1_buffer) * rfd_ring->count;
1631         memset(rfd_ring->buffer_info, 0, size);
1632
1633         /* Zero out the descriptor ring */
1634         memset(rfd_ring->desc, 0, rfd_ring->size);
1635
1636         rfd_ring->next_to_clean = 0;
1637         atomic_set(&rfd_ring->next_to_use, 0);
1638
1639         rrd_ring->next_to_use = 0;
1640         atomic_set(&rrd_ring->next_to_clean, 0);
1641 }
1642
1643 /*
1644  * atl1_clean_tx_ring - Free Tx Buffers
1645  * @adapter: board private structure
1646  */
1647 static void atl1_clean_tx_ring(struct atl1_adapter *adapter)
1648 {
1649         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1650         struct atl1_buffer *buffer_info;
1651         struct pci_dev *pdev = adapter->pdev;
1652         unsigned long size;
1653         unsigned int i;
1654
1655         /* Free all the Tx ring sk_buffs */
1656         for (i = 0; i < tpd_ring->count; i++) {
1657                 buffer_info = &tpd_ring->buffer_info[i];
1658                 if (buffer_info->dma) {
1659                         pci_unmap_page(pdev, buffer_info->dma,
1660                                 buffer_info->length, PCI_DMA_TODEVICE);
1661                         buffer_info->dma = 0;
1662                 }
1663         }
1664
1665         for (i = 0; i < tpd_ring->count; i++) {
1666                 buffer_info = &tpd_ring->buffer_info[i];
1667                 if (buffer_info->skb) {
1668                         dev_kfree_skb_any(buffer_info->skb);
1669                         buffer_info->skb = NULL;
1670                 }
1671         }
1672
1673         size = sizeof(struct atl1_buffer) * tpd_ring->count;
1674         memset(tpd_ring->buffer_info, 0, size);
1675
1676         /* Zero out the descriptor ring */
1677         memset(tpd_ring->desc, 0, tpd_ring->size);
1678
1679         atomic_set(&tpd_ring->next_to_use, 0);
1680         atomic_set(&tpd_ring->next_to_clean, 0);
1681 }
1682
1683 /*
1684  * atl1_free_ring_resources - Free Tx / RX descriptor Resources
1685  * @adapter: board private structure
1686  *
1687  * Free all transmit software resources
1688  */
1689 void atl1_free_ring_resources(struct atl1_adapter *adapter)
1690 {
1691         struct pci_dev *pdev = adapter->pdev;
1692         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1693         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1694         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1695         struct atl1_ring_header *ring_header = &adapter->ring_header;
1696
1697         atl1_clean_tx_ring(adapter);
1698         atl1_clean_rx_ring(adapter);
1699
1700         kfree(tpd_ring->buffer_info);
1701         pci_free_consistent(pdev, ring_header->size, ring_header->desc,
1702                 ring_header->dma);
1703
1704         tpd_ring->buffer_info = NULL;
1705         tpd_ring->desc = NULL;
1706         tpd_ring->dma = 0;
1707
1708         rfd_ring->buffer_info = NULL;
1709         rfd_ring->desc = NULL;
1710         rfd_ring->dma = 0;
1711
1712         rrd_ring->desc = NULL;
1713         rrd_ring->dma = 0;
1714 }
1715
1716 s32 atl1_up(struct atl1_adapter *adapter)
1717 {
1718         struct net_device *netdev = adapter->netdev;
1719         int err;
1720         int irq_flags = IRQF_SAMPLE_RANDOM;
1721
1722         /* hardware has been reset, we need to reload some things */
1723         atl1_set_multi(netdev);
1724         atl1_restore_vlan(adapter);
1725         err = atl1_alloc_rx_buffers(adapter);
1726         if (unlikely(!err))             /* no RX BUFFER allocated */
1727                 return -ENOMEM;
1728
1729         if (unlikely(atl1_configure(adapter))) {
1730                 err = -EIO;
1731                 goto err_up;
1732         }
1733
1734         err = pci_enable_msi(adapter->pdev);
1735         if (err) {
1736                 dev_info(&adapter->pdev->dev,
1737                         "Unable to enable MSI: %d\n", err);
1738                 irq_flags |= IRQF_SHARED;
1739         }
1740
1741         err = request_irq(adapter->pdev->irq, &atl1_intr, irq_flags,
1742                         netdev->name, netdev);
1743         if (unlikely(err))
1744                 goto err_up;
1745
1746         mod_timer(&adapter->watchdog_timer, jiffies);
1747         atl1_irq_enable(adapter);
1748         atl1_check_link(adapter);
1749         return 0;
1750
1751 err_up:
1752         pci_disable_msi(adapter->pdev);
1753         /* free rx_buffers */
1754         atl1_clean_rx_ring(adapter);
1755         return err;
1756 }
1757
1758 void atl1_down(struct atl1_adapter *adapter)
1759 {
1760         struct net_device *netdev = adapter->netdev;
1761
1762         del_timer_sync(&adapter->watchdog_timer);
1763         del_timer_sync(&adapter->phy_config_timer);
1764         adapter->phy_timer_pending = false;
1765
1766         atl1_irq_disable(adapter);
1767         free_irq(adapter->pdev->irq, netdev);
1768         pci_disable_msi(adapter->pdev);
1769         atl1_reset_hw(&adapter->hw);
1770         adapter->cmb.cmb->int_stats = 0;
1771
1772         adapter->link_speed = SPEED_0;
1773         adapter->link_duplex = -1;
1774         netif_carrier_off(netdev);
1775         netif_stop_queue(netdev);
1776
1777         atl1_clean_tx_ring(adapter);
1778         atl1_clean_rx_ring(adapter);
1779 }
1780
1781 /*
1782  * atl1_change_mtu - Change the Maximum Transfer Unit
1783  * @netdev: network interface device structure
1784  * @new_mtu: new value for maximum frame size
1785  *
1786  * Returns 0 on success, negative on failure
1787  */
1788 static int atl1_change_mtu(struct net_device *netdev, int new_mtu)
1789 {
1790         struct atl1_adapter *adapter = netdev_priv(netdev);
1791         int old_mtu = netdev->mtu;
1792         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1793
1794         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
1795             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
1796                 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
1797                 return -EINVAL;
1798         }
1799
1800         adapter->hw.max_frame_size = max_frame;
1801         adapter->hw.tx_jumbo_task_th = (max_frame + 7) >> 3;
1802         adapter->rx_buffer_len = (max_frame + 7) & ~7;
1803         adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;
1804
1805         netdev->mtu = new_mtu;
1806         if ((old_mtu != new_mtu) && netif_running(netdev)) {
1807                 atl1_down(adapter);
1808                 atl1_up(adapter);
1809         }
1810
1811         return 0;
1812 }
1813
1814 /*
1815  * atl1_set_mac - Change the Ethernet Address of the NIC
1816  * @netdev: network interface device structure
1817  * @p: pointer to an address structure
1818  *
1819  * Returns 0 on success, negative on failure
1820  */
1821 static int atl1_set_mac(struct net_device *netdev, void *p)
1822 {
1823         struct atl1_adapter *adapter = netdev_priv(netdev);
1824         struct sockaddr *addr = p;
1825
1826         if (netif_running(netdev))
1827                 return -EBUSY;
1828
1829         if (!is_valid_ether_addr(addr->sa_data))
1830                 return -EADDRNOTAVAIL;
1831
1832         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1833         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
1834
1835         atl1_set_mac_addr(&adapter->hw);
1836         return 0;
1837 }
1838
1839 /*
1840  * atl1_watchdog - Timer Call-back
1841  * @data: pointer to netdev cast into an unsigned long
1842  */
1843 static void atl1_watchdog(unsigned long data)
1844 {
1845         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
1846
1847         /* Reset the timer */
1848         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1849 }
1850
1851 static int mdio_read(struct net_device *netdev, int phy_id, int reg_num)
1852 {
1853         struct atl1_adapter *adapter = netdev_priv(netdev);
1854         u16 result;
1855
1856         atl1_read_phy_reg(&adapter->hw, reg_num & 0x1f, &result);
1857
1858         return result;
1859 }
1860
1861 static void mdio_write(struct net_device *netdev, int phy_id, int reg_num,
1862         int val)
1863 {
1864         struct atl1_adapter *adapter = netdev_priv(netdev);
1865
1866         atl1_write_phy_reg(&adapter->hw, reg_num, val);
1867 }
1868
1869 /*
1870  * atl1_mii_ioctl -
1871  * @netdev:
1872  * @ifreq:
1873  * @cmd:
1874  */
1875 static int atl1_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1876 {
1877         struct atl1_adapter *adapter = netdev_priv(netdev);
1878         unsigned long flags;
1879         int retval;
1880
1881         if (!netif_running(netdev))
1882                 return -EINVAL;
1883
1884         spin_lock_irqsave(&adapter->lock, flags);
1885         retval = generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
1886         spin_unlock_irqrestore(&adapter->lock, flags);
1887
1888         return retval;
1889 }
1890
1891 /*
1892  * atl1_ioctl -
1893  * @netdev:
1894  * @ifreq:
1895  * @cmd:
1896  */
1897 static int atl1_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1898 {
1899         switch (cmd) {
1900         case SIOCGMIIPHY:
1901         case SIOCGMIIREG:
1902         case SIOCSMIIREG:
1903                 return atl1_mii_ioctl(netdev, ifr, cmd);
1904         default:
1905                 return -EOPNOTSUPP;
1906         }
1907 }
1908
1909 /*
1910  * atl1_tx_timeout - Respond to a Tx Hang
1911  * @netdev: network interface device structure
1912  */
1913 static void atl1_tx_timeout(struct net_device *netdev)
1914 {
1915         struct atl1_adapter *adapter = netdev_priv(netdev);
1916         /* Do the reset outside of interrupt context */
1917         schedule_work(&adapter->tx_timeout_task);
1918 }
1919
1920 /*
1921  * atl1_phy_config - Timer Call-back
1922  * @data: pointer to netdev cast into an unsigned long
1923  */
1924 static void atl1_phy_config(unsigned long data)
1925 {
1926         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
1927         struct atl1_hw *hw = &adapter->hw;
1928         unsigned long flags;
1929
1930         spin_lock_irqsave(&adapter->lock, flags);
1931         adapter->phy_timer_pending = false;
1932         atl1_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
1933         atl1_write_phy_reg(hw, MII_AT001_CR, hw->mii_1000t_ctrl_reg);
1934         atl1_write_phy_reg(hw, MII_BMCR, MII_CR_RESET | MII_CR_AUTO_NEG_EN);
1935         spin_unlock_irqrestore(&adapter->lock, flags);
1936 }
1937
1938 int atl1_reset(struct atl1_adapter *adapter)
1939 {
1940         int ret;
1941
1942         ret = atl1_reset_hw(&adapter->hw);
1943         if (ret != ATL1_SUCCESS)
1944                 return ret;
1945         return atl1_init_hw(&adapter->hw);
1946 }
1947
1948 /*
1949  * atl1_open - Called when a network interface is made active
1950  * @netdev: network interface device structure
1951  *
1952  * Returns 0 on success, negative value on failure
1953  *
1954  * The open entry point is called when a network interface is made
1955  * active by the system (IFF_UP).  At this point all resources needed
1956  * for transmit and receive operations are allocated, the interrupt
1957  * handler is registered with the OS, the watchdog timer is started,
1958  * and the stack is notified that the interface is ready.
1959  */
1960 static int atl1_open(struct net_device *netdev)
1961 {
1962         struct atl1_adapter *adapter = netdev_priv(netdev);
1963         int err;
1964
1965         /* allocate transmit descriptors */
1966         err = atl1_setup_ring_resources(adapter);
1967         if (err)
1968                 return err;
1969
1970         err = atl1_up(adapter);
1971         if (err)
1972                 goto err_up;
1973
1974         return 0;
1975
1976 err_up:
1977         atl1_reset(adapter);
1978         return err;
1979 }
1980
1981 /*
1982  * atl1_close - Disables a network interface
1983  * @netdev: network interface device structure
1984  *
1985  * Returns 0, this is not allowed to fail
1986  *
1987  * The close entry point is called when an interface is de-activated
1988  * by the OS.  The hardware is still under the drivers control, but
1989  * needs to be disabled.  A global MAC reset is issued to stop the
1990  * hardware, and all transmit and receive resources are freed.
1991  */
1992 static int atl1_close(struct net_device *netdev)
1993 {
1994         struct atl1_adapter *adapter = netdev_priv(netdev);
1995         atl1_down(adapter);
1996         atl1_free_ring_resources(adapter);
1997         return 0;
1998 }
1999
2000 #ifdef CONFIG_NET_POLL_CONTROLLER
2001 static void atl1_poll_controller(struct net_device *netdev)
2002 {
2003         disable_irq(netdev->irq);
2004         atl1_intr(netdev->irq, netdev);
2005         enable_irq(netdev->irq);
2006 }
2007 #endif
2008
2009 /*
2010  * Orphaned vendor comment left intact here:
2011  * <vendor comment>
2012  * If TPD Buffer size equal to 0, PCIE DMAR_TO_INT
2013  * will assert. We do soft reset <0x1400=1> according
2014  * with the SPEC. BUT, it seemes that PCIE or DMA
2015  * state-machine will not be reset. DMAR_TO_INT will
2016  * assert again and again.
2017  * </vendor comment>
2018  */
2019 static void atl1_tx_timeout_task(struct work_struct *work)
2020 {
2021         struct atl1_adapter *adapter =
2022                 container_of(work, struct atl1_adapter, tx_timeout_task);
2023         struct net_device *netdev = adapter->netdev;
2024
2025         netif_device_detach(netdev);
2026         atl1_down(adapter);
2027         atl1_up(adapter);
2028         netif_device_attach(netdev);
2029 }
2030
2031 /*
2032  * atl1_link_chg_task - deal with link change event Out of interrupt context
2033  */
2034 static void atl1_link_chg_task(struct work_struct *work)
2035 {
2036         struct atl1_adapter *adapter =
2037                container_of(work, struct atl1_adapter, link_chg_task);
2038         unsigned long flags;
2039
2040         spin_lock_irqsave(&adapter->lock, flags);
2041         atl1_check_link(adapter);
2042         spin_unlock_irqrestore(&adapter->lock, flags);
2043 }
2044
2045 /*
2046  * atl1_pcie_patch - Patch for PCIE module
2047  */
2048 static void atl1_pcie_patch(struct atl1_adapter *adapter)
2049 {
2050         u32 value;
2051
2052         /* much vendor magic here */
2053         value = 0x6500;
2054         iowrite32(value, adapter->hw.hw_addr + 0x12FC);
2055         /* pcie flow control mode change */
2056         value = ioread32(adapter->hw.hw_addr + 0x1008);
2057         value |= 0x8000;
2058         iowrite32(value, adapter->hw.hw_addr + 0x1008);
2059 }
2060
2061 /*
2062  * When ACPI resume on some VIA MotherBoard, the Interrupt Disable bit/0x400
2063  * on PCI Command register is disable.
2064  * The function enable this bit.
2065  * Brackett, 2006/03/15
2066  */
2067 static void atl1_via_workaround(struct atl1_adapter *adapter)
2068 {
2069         unsigned long value;
2070
2071         value = ioread16(adapter->hw.hw_addr + PCI_COMMAND);
2072         if (value & PCI_COMMAND_INTX_DISABLE)
2073                 value &= ~PCI_COMMAND_INTX_DISABLE;
2074         iowrite32(value, adapter->hw.hw_addr + PCI_COMMAND);
2075 }
2076
2077 /*
2078  * atl1_probe - Device Initialization Routine
2079  * @pdev: PCI device information struct
2080  * @ent: entry in atl1_pci_tbl
2081  *
2082  * Returns 0 on success, negative on failure
2083  *
2084  * atl1_probe initializes an adapter identified by a pci_dev structure.
2085  * The OS initialization, configuring of the adapter private structure,
2086  * and a hardware reset occur.
2087  */
2088 static int __devinit atl1_probe(struct pci_dev *pdev,
2089         const struct pci_device_id *ent)
2090 {
2091         struct net_device *netdev;
2092         struct atl1_adapter *adapter;
2093         static int cards_found = 0;
2094         bool pci_using_64 = true;
2095         int err;
2096
2097         err = pci_enable_device(pdev);
2098         if (err)
2099                 return err;
2100
2101         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
2102         if (err) {
2103                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2104                 if (err) {
2105                         dev_err(&pdev->dev, "no usable DMA configuration\n");
2106                         goto err_dma;
2107                 }
2108                 pci_using_64 = false;
2109         }
2110         /* Mark all PCI regions associated with PCI device
2111          * pdev as being reserved by owner atl1_driver_name
2112          */
2113         err = pci_request_regions(pdev, atl1_driver_name);
2114         if (err)
2115                 goto err_request_regions;
2116
2117         /* Enables bus-mastering on the device and calls
2118          * pcibios_set_master to do the needed arch specific settings
2119          */
2120         pci_set_master(pdev);
2121
2122         netdev = alloc_etherdev(sizeof(struct atl1_adapter));
2123         if (!netdev) {
2124                 err = -ENOMEM;
2125                 goto err_alloc_etherdev;
2126         }
2127         SET_MODULE_OWNER(netdev);
2128         SET_NETDEV_DEV(netdev, &pdev->dev);
2129
2130         pci_set_drvdata(pdev, netdev);
2131         adapter = netdev_priv(netdev);
2132         adapter->netdev = netdev;
2133         adapter->pdev = pdev;
2134         adapter->hw.back = adapter;
2135
2136         adapter->hw.hw_addr = pci_iomap(pdev, 0, 0);
2137         if (!adapter->hw.hw_addr) {
2138                 err = -EIO;
2139                 goto err_pci_iomap;
2140         }
2141         /* get device revision number */
2142         adapter->hw.dev_rev = ioread16(adapter->hw.hw_addr +
2143                 (REG_MASTER_CTRL + 2));
2144         dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
2145
2146         /* set default ring resource counts */
2147         adapter->rfd_ring.count = adapter->rrd_ring.count = ATL1_DEFAULT_RFD;
2148         adapter->tpd_ring.count = ATL1_DEFAULT_TPD;
2149
2150         adapter->mii.dev = netdev;
2151         adapter->mii.mdio_read = mdio_read;
2152         adapter->mii.mdio_write = mdio_write;
2153         adapter->mii.phy_id_mask = 0x1f;
2154         adapter->mii.reg_num_mask = 0x1f;
2155
2156         netdev->open = &atl1_open;
2157         netdev->stop = &atl1_close;
2158         netdev->hard_start_xmit = &atl1_xmit_frame;
2159         netdev->get_stats = &atl1_get_stats;
2160         netdev->set_multicast_list = &atl1_set_multi;
2161         netdev->set_mac_address = &atl1_set_mac;
2162         netdev->change_mtu = &atl1_change_mtu;
2163         netdev->do_ioctl = &atl1_ioctl;
2164         netdev->tx_timeout = &atl1_tx_timeout;
2165         netdev->watchdog_timeo = 5 * HZ;
2166 #ifdef CONFIG_NET_POLL_CONTROLLER
2167         netdev->poll_controller = atl1_poll_controller;
2168 #endif
2169         netdev->vlan_rx_register = atl1_vlan_rx_register;
2170
2171         netdev->ethtool_ops = &atl1_ethtool_ops;
2172         adapter->bd_number = cards_found;
2173         adapter->pci_using_64 = pci_using_64;
2174
2175         /* setup the private structure */
2176         err = atl1_sw_init(adapter);
2177         if (err)
2178                 goto err_common;
2179
2180         netdev->features = NETIF_F_HW_CSUM;
2181         netdev->features |= NETIF_F_SG;
2182         netdev->features |= (NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
2183
2184         /*
2185          * FIXME - Until tso performance gets fixed, disable the feature.
2186          * Enable it with ethtool -K if desired.
2187          */
2188         /* netdev->features |= NETIF_F_TSO; */
2189
2190         if (pci_using_64)
2191                 netdev->features |= NETIF_F_HIGHDMA;
2192
2193         netdev->features |= NETIF_F_LLTX;
2194
2195         /*
2196          * patch for some L1 of old version,
2197          * the final version of L1 may not need these
2198          * patches
2199          */
2200         /* atl1_pcie_patch(adapter); */
2201
2202         /* really reset GPHY core */
2203         iowrite16(0, adapter->hw.hw_addr + REG_GPHY_ENABLE);
2204
2205         /*
2206          * reset the controller to
2207          * put the device in a known good starting state
2208          */
2209         if (atl1_reset_hw(&adapter->hw)) {
2210                 err = -EIO;
2211                 goto err_common;
2212         }
2213
2214         /* copy the MAC address out of the EEPROM */
2215         atl1_read_mac_addr(&adapter->hw);
2216         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2217
2218         if (!is_valid_ether_addr(netdev->dev_addr)) {
2219                 err = -EIO;
2220                 goto err_common;
2221         }
2222
2223         atl1_check_options(adapter);
2224
2225         /* pre-init the MAC, and setup link */
2226         err = atl1_init_hw(&adapter->hw);
2227         if (err) {
2228                 err = -EIO;
2229                 goto err_common;
2230         }
2231
2232         atl1_pcie_patch(adapter);
2233         /* assume we have no link for now */
2234         netif_carrier_off(netdev);
2235         netif_stop_queue(netdev);
2236
2237         init_timer(&adapter->watchdog_timer);
2238         adapter->watchdog_timer.function = &atl1_watchdog;
2239         adapter->watchdog_timer.data = (unsigned long)adapter;
2240
2241         init_timer(&adapter->phy_config_timer);
2242         adapter->phy_config_timer.function = &atl1_phy_config;
2243         adapter->phy_config_timer.data = (unsigned long)adapter;
2244         adapter->phy_timer_pending = false;
2245
2246         INIT_WORK(&adapter->tx_timeout_task, atl1_tx_timeout_task);
2247
2248         INIT_WORK(&adapter->link_chg_task, atl1_link_chg_task);
2249
2250         INIT_WORK(&adapter->pcie_dma_to_rst_task, atl1_tx_timeout_task);
2251
2252         err = register_netdev(netdev);
2253         if (err)
2254                 goto err_common;
2255
2256         cards_found++;
2257         atl1_via_workaround(adapter);
2258         return 0;
2259
2260 err_common:
2261         pci_iounmap(pdev, adapter->hw.hw_addr);
2262 err_pci_iomap:
2263         free_netdev(netdev);
2264 err_alloc_etherdev:
2265         pci_release_regions(pdev);
2266 err_dma:
2267 err_request_regions:
2268         pci_disable_device(pdev);
2269         return err;
2270 }
2271
2272 /*
2273  * atl1_remove - Device Removal Routine
2274  * @pdev: PCI device information struct
2275  *
2276  * atl1_remove is called by the PCI subsystem to alert the driver
2277  * that it should release a PCI device.  The could be caused by a
2278  * Hot-Plug event, or because the driver is going to be removed from
2279  * memory.
2280  */
2281 static void __devexit atl1_remove(struct pci_dev *pdev)
2282 {
2283         struct net_device *netdev = pci_get_drvdata(pdev);
2284         struct atl1_adapter *adapter;
2285         /* Device not available. Return. */
2286         if (!netdev)
2287                 return;
2288
2289         adapter = netdev_priv(netdev);
2290
2291         /* Some atl1 boards lack persistent storage for their MAC, and get it
2292          * from the BIOS during POST.  If we've been messing with the MAC
2293          * address, we need to save the permanent one.
2294          */
2295         if (memcmp(adapter->hw.mac_addr, adapter->hw.perm_mac_addr, ETH_ALEN)) {
2296                 memcpy(adapter->hw.mac_addr, adapter->hw.perm_mac_addr,
2297                         ETH_ALEN);
2298                 atl1_set_mac_addr(&adapter->hw);
2299         }
2300
2301         iowrite16(0, adapter->hw.hw_addr + REG_GPHY_ENABLE);
2302         unregister_netdev(netdev);
2303         pci_iounmap(pdev, adapter->hw.hw_addr);
2304         pci_release_regions(pdev);
2305         free_netdev(netdev);
2306         pci_disable_device(pdev);
2307 }
2308
2309 #ifdef CONFIG_PM
2310 static int atl1_suspend(struct pci_dev *pdev, pm_message_t state)
2311 {
2312         struct net_device *netdev = pci_get_drvdata(pdev);
2313         struct atl1_adapter *adapter = netdev_priv(netdev);
2314         struct atl1_hw *hw = &adapter->hw;
2315         u32 ctrl = 0;
2316         u32 wufc = adapter->wol;
2317
2318         netif_device_detach(netdev);
2319         if (netif_running(netdev))
2320                 atl1_down(adapter);
2321
2322         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2323         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2324         if (ctrl & BMSR_LSTATUS)
2325                 wufc &= ~ATL1_WUFC_LNKC;
2326
2327         /* reduce speed to 10/100M */
2328         if (wufc) {
2329                 atl1_phy_enter_power_saving(hw);
2330                 /* if resume, let driver to re- setup link */
2331                 hw->phy_configured = false;
2332                 atl1_set_mac_addr(hw);
2333                 atl1_set_multi(netdev);
2334
2335                 ctrl = 0;
2336                 /* turn on magic packet wol */
2337                 if (wufc & ATL1_WUFC_MAG)
2338                         ctrl = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2339
2340                 /* turn on Link change WOL */
2341                 if (wufc & ATL1_WUFC_LNKC)
2342                         ctrl |= (WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN);
2343                 iowrite32(ctrl, hw->hw_addr + REG_WOL_CTRL);
2344
2345                 /* turn on all-multi mode if wake on multicast is enabled */
2346                 ctrl = ioread32(hw->hw_addr + REG_MAC_CTRL);
2347                 ctrl &= ~MAC_CTRL_DBG;
2348                 ctrl &= ~MAC_CTRL_PROMIS_EN;
2349                 if (wufc & ATL1_WUFC_MC)
2350                         ctrl |= MAC_CTRL_MC_ALL_EN;
2351                 else
2352                         ctrl &= ~MAC_CTRL_MC_ALL_EN;
2353
2354                 /* turn on broadcast mode if wake on-BC is enabled */
2355                 if (wufc & ATL1_WUFC_BC)
2356                         ctrl |= MAC_CTRL_BC_EN;
2357                 else
2358                         ctrl &= ~MAC_CTRL_BC_EN;
2359
2360                 /* enable RX */
2361                 ctrl |= MAC_CTRL_RX_EN;
2362                 iowrite32(ctrl, hw->hw_addr + REG_MAC_CTRL);
2363                 pci_enable_wake(pdev, PCI_D3hot, 1);
2364                 pci_enable_wake(pdev, PCI_D3cold, 1);
2365         } else {
2366                 iowrite32(0, hw->hw_addr + REG_WOL_CTRL);
2367                 pci_enable_wake(pdev, PCI_D3hot, 0);
2368                 pci_enable_wake(pdev, PCI_D3cold, 0);
2369         }
2370
2371         pci_save_state(pdev);
2372         pci_disable_device(pdev);
2373
2374         pci_set_power_state(pdev, PCI_D3hot);
2375
2376         return 0;
2377 }
2378
2379 static int atl1_resume(struct pci_dev *pdev)
2380 {
2381         struct net_device *netdev = pci_get_drvdata(pdev);
2382         struct atl1_adapter *adapter = netdev_priv(netdev);
2383         u32 ret_val;
2384
2385         pci_set_power_state(pdev, 0);
2386         pci_restore_state(pdev);
2387
2388         ret_val = pci_enable_device(pdev);
2389         pci_enable_wake(pdev, PCI_D3hot, 0);
2390         pci_enable_wake(pdev, PCI_D3cold, 0);
2391
2392         iowrite32(0, adapter->hw.hw_addr + REG_WOL_CTRL);
2393         atl1_reset(adapter);
2394
2395         if (netif_running(netdev))
2396                 atl1_up(adapter);
2397         netif_device_attach(netdev);
2398
2399         atl1_via_workaround(adapter);
2400
2401         return 0;
2402 }
2403 #else
2404 #define atl1_suspend NULL
2405 #define atl1_resume NULL
2406 #endif
2407
2408 static struct pci_driver atl1_driver = {
2409         .name = atl1_driver_name,
2410         .id_table = atl1_pci_tbl,
2411         .probe = atl1_probe,
2412         .remove = __devexit_p(atl1_remove),
2413         .suspend = atl1_suspend,
2414         .resume = atl1_resume
2415 };
2416
2417 /*
2418  * atl1_exit_module - Driver Exit Cleanup Routine
2419  *
2420  * atl1_exit_module is called just before the driver is removed
2421  * from memory.
2422  */
2423 static void __exit atl1_exit_module(void)
2424 {
2425         pci_unregister_driver(&atl1_driver);
2426 }
2427
2428 /*
2429  * atl1_init_module - Driver Registration Routine
2430  *
2431  * atl1_init_module is the first routine called when the driver is
2432  * loaded. All it does is register with the PCI subsystem.
2433  */
2434 static int __init atl1_init_module(void)
2435 {
2436         return pci_register_driver(&atl1_driver);
2437 }
2438
2439 module_init(atl1_init_module);
2440 module_exit(atl1_exit_module);