git.oblomov.eu Git - linux-2.6/blob - 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/if_ether.h>
  63 #include <linux/irqreturn.h>
  64 #include <linux/workqueue.h>
  65 #include <linux/timer.h>
  66 #include <linux/jiffies.h>
  67 #include <linux/hardirq.h>
  68 #include <linux/interrupt.h>
  69 #include <linux/irqflags.h>
  70 #include <linux/dma-mapping.h>
  71 #include <linux/net.h>
  72 #include <linux/pm.h>
  73 #include <linux/in.h>
  74 #include <linux/ip.h>
  75 #include <linux/tcp.h>
  76 #include <linux/compiler.h>
  77 #include <linux/delay.h>
  78 #include <linux/mii.h>
  79 #include <linux/interrupt.h>
  80 #include <net/checksum.h>
  81
  82 #include <asm/atomic.h>
  83 #include <asm/byteorder.h>
  84
  85 #include "atl1.h"
  86
  87 #define DRIVER_VERSION "2.0.7"
  88
  89 char atl1_driver_name[] = "atl1";
  90 static const char atl1_driver_string[] = "Attansic L1 Ethernet Network Driver";
  91 static const char atl1_copyright[] = "Copyright(c) 2005-2006 Attansic Corporation.";
  92 char atl1_driver_version[] = DRIVER_VERSION;
  93
  94 MODULE_AUTHOR
  95     ("Attansic Corporation <xiong_huang@attansic.com>, Chris Snook <csnook@redhat.com>, Jay Cliburn <jcliburn@gmail.com>");
  96 MODULE_DESCRIPTION("Attansic 1000M Ethernet Network Driver");
  97 MODULE_LICENSE("GPL");
  98 MODULE_VERSION(DRIVER_VERSION);
  99
 100 /*
 101  * atl1_pci_tbl - PCI Device ID Table
 102  */
 103 static const struct pci_device_id atl1_pci_tbl[] = {
 104         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1)},
 105         /* required last entry */
 106         {0,}
 107 };
 108
 109 MODULE_DEVICE_TABLE(pci, atl1_pci_tbl);
 110
 111 /*
 112  * atl1_sw_init - Initialize general software structures (struct atl1_adapter)
 113  * @adapter: board private structure to initialize
 114  *
 115  * atl1_sw_init initializes the Adapter private data structure.
 116  * Fields are initialized based on PCI device information and
 117  * OS network device settings (MTU size).
 118  */
 119 static int __devinit atl1_sw_init(struct atl1_adapter *adapter)
 120 {
 121         struct atl1_hw *hw = &adapter->hw;
 122         struct net_device *netdev = adapter->netdev;
 123
 124         hw->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 125         hw->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
 126
 127         adapter->wol = 0;
 128         adapter->rx_buffer_len = (hw->max_frame_size + 7) & ~7;
 129         adapter->ict = 50000;   /* 100ms */
 130         adapter->link_speed = SPEED_0;  /* hardware init */
 131         adapter->link_duplex = FULL_DUPLEX;
 132
 133         hw->phy_configured = false;
 134         hw->preamble_len = 7;
 135         hw->ipgt = 0x60;
 136         hw->min_ifg = 0x50;
 137         hw->ipgr1 = 0x40;
 138         hw->ipgr2 = 0x60;
 139         hw->max_retry = 0xf;
 140         hw->lcol = 0x37;
 141         hw->jam_ipg = 7;
 142         hw->rfd_burst = 8;
 143         hw->rrd_burst = 8;
 144         hw->rfd_fetch_gap = 1;
 145         hw->rx_jumbo_th = adapter->rx_buffer_len / 8;
 146         hw->rx_jumbo_lkah = 1;
 147         hw->rrd_ret_timer = 16;
 148         hw->tpd_burst = 4;
 149         hw->tpd_fetch_th = 16;
 150         hw->txf_burst = 0x100;
 151         hw->tx_jumbo_task_th = (hw->max_frame_size + 7) >> 3;
 152         hw->tpd_fetch_gap = 1;
 153         hw->rcb_value = atl1_rcb_64;
 154         hw->dma_ord = atl1_dma_ord_enh;
 155         hw->dmar_block = atl1_dma_req_256;
 156         hw->dmaw_block = atl1_dma_req_256;
 157         hw->cmb_rrd = 4;
 158         hw->cmb_tpd = 4;
 159         hw->cmb_rx_timer = 1;   /* about 2us */
 160         hw->cmb_tx_timer = 1;   /* about 2us */
 161         hw->smb_timer = 100000; /* about 200ms */
 162
 163         spin_lock_init(&adapter->lock);
 164         spin_lock_init(&adapter->mb_lock);
 165
 166         return 0;
 167 }
 168
 169 static int mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 170 {
 171         struct atl1_adapter *adapter = netdev_priv(netdev);
 172         u16 result;
 173
 174         atl1_read_phy_reg(&adapter->hw, reg_num & 0x1f, &result);
 175
 176         return result;
 177 }
 178
 179 static void mdio_write(struct net_device *netdev, int phy_id, int reg_num,
 180         int val)
 181 {
 182         struct atl1_adapter *adapter = netdev_priv(netdev);
 183
 184         atl1_write_phy_reg(&adapter->hw, reg_num, val);
 185 }
 186
 187 /*
 188  * atl1_mii_ioctl -
 189  * @netdev:
 190  * @ifreq:
 191  * @cmd:
 192  */
 193 static int atl1_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 194 {
 195         struct atl1_adapter *adapter = netdev_priv(netdev);
 196         unsigned long flags;
 197         int retval;
 198
 199         if (!netif_running(netdev))
 200                 return -EINVAL;
 201
 202         spin_lock_irqsave(&adapter->lock, flags);
 203         retval = generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
 204         spin_unlock_irqrestore(&adapter->lock, flags);
 205
 206         return retval;
 207 }
 208
 209 /*
 210  * atl1_ioctl -
 211  * @netdev:
 212  * @ifreq:
 213  * @cmd:
 214  */
 215 static int atl1_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 216 {
 217         switch (cmd) {
 218         case SIOCGMIIPHY:
 219         case SIOCGMIIREG:
 220         case SIOCSMIIREG:
 221                 return atl1_mii_ioctl(netdev, ifr, cmd);
 222         default:
 223                 return -EOPNOTSUPP;
 224         }
 225 }
 226
 227 /*
 228  * atl1_setup_mem_resources - allocate Tx / RX descriptor resources
 229  * @adapter: board private structure
 230  *
 231  * Return 0 on success, negative on failure
 232  */
 233 s32 atl1_setup_ring_resources(struct atl1_adapter *adapter)
 234 {
 235         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 236         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 237         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 238         struct atl1_ring_header *ring_header = &adapter->ring_header;
 239         struct pci_dev *pdev = adapter->pdev;
 240         int size;
 241         u8 offset = 0;
 242
 243         size = sizeof(struct atl1_buffer) * (tpd_ring->count + rfd_ring->count);
 244         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 245         if (unlikely(!tpd_ring->buffer_info)) {
 246                 dev_err(&pdev->dev, "kzalloc failed , size = D%d\n", size);
 247                 goto err_nomem;
 248         }
 249         rfd_ring->buffer_info =
 250                 (struct atl1_buffer *)(tpd_ring->buffer_info + tpd_ring->count);
 251
 252         /* real ring DMA buffer
 253          * each ring/block may need up to 8 bytes for alignment, hence the
 254          * additional 40 bytes tacked onto the end.
 255          */
 256         ring_header->size = size =
 257                 sizeof(struct tx_packet_desc) * tpd_ring->count
 258                 + sizeof(struct rx_free_desc) * rfd_ring->count
 259                 + sizeof(struct rx_return_desc) * rrd_ring->count
 260                 + sizeof(struct coals_msg_block)
 261                 + sizeof(struct stats_msg_block)
 262                 + 40;
 263
 264         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 265                 &ring_header->dma);
 266         if (unlikely(!ring_header->desc)) {
 267                 dev_err(&pdev->dev, "pci_alloc_consistent failed\n");
 268                 goto err_nomem;
 269         }
 270
 271         memset(ring_header->desc, 0, ring_header->size);
 272
 273         /* init TPD ring */
 274         tpd_ring->dma = ring_header->dma;
 275         offset = (tpd_ring->dma & 0x7) ? (8 - (ring_header->dma & 0x7)) : 0;
 276         tpd_ring->dma += offset;
 277         tpd_ring->desc = (u8 *) ring_header->desc + offset;
 278         tpd_ring->size = sizeof(struct tx_packet_desc) * tpd_ring->count;
 279
 280         /* init RFD ring */
 281         rfd_ring->dma = tpd_ring->dma + tpd_ring->size;
 282         offset = (rfd_ring->dma & 0x7) ? (8 - (rfd_ring->dma & 0x7)) : 0;
 283         rfd_ring->dma += offset;
 284         rfd_ring->desc = (u8 *) tpd_ring->desc + (tpd_ring->size + offset);
 285         rfd_ring->size = sizeof(struct rx_free_desc) * rfd_ring->count;
 286
 287
 288         /* init RRD ring */
 289         rrd_ring->dma = rfd_ring->dma + rfd_ring->size;
 290         offset = (rrd_ring->dma & 0x7) ? (8 - (rrd_ring->dma & 0x7)) : 0;
 291         rrd_ring->dma += offset;
 292         rrd_ring->desc = (u8 *) rfd_ring->desc + (rfd_ring->size + offset);
 293         rrd_ring->size = sizeof(struct rx_return_desc) * rrd_ring->count;
 294
 295
 296         /* init CMB */
 297         adapter->cmb.dma = rrd_ring->dma + rrd_ring->size;
 298         offset = (adapter->cmb.dma & 0x7) ? (8 - (adapter->cmb.dma & 0x7)) : 0;
 299         adapter->cmb.dma += offset;
 300         adapter->cmb.cmb = (struct coals_msg_block *)
 301                 ((u8 *) rrd_ring->desc + (rrd_ring->size + offset));
 302
 303         /* init SMB */
 304         adapter->smb.dma = adapter->cmb.dma + sizeof(struct coals_msg_block);
 305         offset = (adapter->smb.dma & 0x7) ? (8 - (adapter->smb.dma & 0x7)) : 0;
 306         adapter->smb.dma += offset;
 307         adapter->smb.smb = (struct stats_msg_block *)
 308                 ((u8 *) adapter->cmb.cmb +
 309                 (sizeof(struct coals_msg_block) + offset));
 310
 311         return ATL1_SUCCESS;
 312
 313 err_nomem:
 314         kfree(tpd_ring->buffer_info);
 315         return -ENOMEM;
 316 }
 317
 318 static void atl1_init_ring_ptrs(struct atl1_adapter *adapter)
 319 {
 320         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 321         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 322         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 323
 324         atomic_set(&tpd_ring->next_to_use, 0);
 325         atomic_set(&tpd_ring->next_to_clean, 0);
 326
 327         rfd_ring->next_to_clean = 0;
 328         atomic_set(&rfd_ring->next_to_use, 0);
 329
 330         rrd_ring->next_to_use = 0;
 331         atomic_set(&rrd_ring->next_to_clean, 0);
 332 }
 333
 334 /*
 335  * atl1_clean_rx_ring - Free RFD Buffers
 336  * @adapter: board private structure
 337  */
 338 static void atl1_clean_rx_ring(struct atl1_adapter *adapter)
 339 {
 340         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 341         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 342         struct atl1_buffer *buffer_info;
 343         struct pci_dev *pdev = adapter->pdev;
 344         unsigned long size;
 345         unsigned int i;
 346
 347         /* Free all the Rx ring sk_buffs */
 348         for (i = 0; i < rfd_ring->count; i++) {
 349                 buffer_info = &rfd_ring->buffer_info[i];
 350                 if (buffer_info->dma) {
 351                         pci_unmap_page(pdev, buffer_info->dma,
 352                                 buffer_info->length, PCI_DMA_FROMDEVICE);
 353                         buffer_info->dma = 0;
 354                 }
 355                 if (buffer_info->skb) {
 356                         dev_kfree_skb(buffer_info->skb);
 357                         buffer_info->skb = NULL;
 358                 }
 359         }
 360
 361         size = sizeof(struct atl1_buffer) * rfd_ring->count;
 362         memset(rfd_ring->buffer_info, 0, size);
 363
 364         /* Zero out the descriptor ring */
 365         memset(rfd_ring->desc, 0, rfd_ring->size);
 366
 367         rfd_ring->next_to_clean = 0;
 368         atomic_set(&rfd_ring->next_to_use, 0);
 369
 370         rrd_ring->next_to_use = 0;
 371         atomic_set(&rrd_ring->next_to_clean, 0);
 372 }
 373
 374 /*
 375  * atl1_clean_tx_ring - Free Tx Buffers
 376  * @adapter: board private structure
 377  */
 378 static void atl1_clean_tx_ring(struct atl1_adapter *adapter)
 379 {
 380         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 381         struct atl1_buffer *buffer_info;
 382         struct pci_dev *pdev = adapter->pdev;
 383         unsigned long size;
 384         unsigned int i;
 385
 386         /* Free all the Tx ring sk_buffs */
 387         for (i = 0; i < tpd_ring->count; i++) {
 388                 buffer_info = &tpd_ring->buffer_info[i];
 389                 if (buffer_info->dma) {
 390                         pci_unmap_page(pdev, buffer_info->dma,
 391                                 buffer_info->length, PCI_DMA_TODEVICE);
 392                         buffer_info->dma = 0;
 393                 }
 394         }
 395
 396         for (i = 0; i < tpd_ring->count; i++) {
 397                 buffer_info = &tpd_ring->buffer_info[i];
 398                 if (buffer_info->skb) {
 399                         dev_kfree_skb_any(buffer_info->skb);
 400                         buffer_info->skb = NULL;
 401                 }
 402         }
 403
 404         size = sizeof(struct atl1_buffer) * tpd_ring->count;
 405         memset(tpd_ring->buffer_info, 0, size);
 406
 407         /* Zero out the descriptor ring */
 408         memset(tpd_ring->desc, 0, tpd_ring->size);
 409
 410         atomic_set(&tpd_ring->next_to_use, 0);
 411         atomic_set(&tpd_ring->next_to_clean, 0);
 412 }
 413
 414 /*
 415  * atl1_free_ring_resources - Free Tx / RX descriptor Resources
 416  * @adapter: board private structure
 417  *
 418  * Free all transmit software resources
 419  */
 420 void atl1_free_ring_resources(struct atl1_adapter *adapter)
 421 {
 422         struct pci_dev *pdev = adapter->pdev;
 423         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
 424         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
 425         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
 426         struct atl1_ring_header *ring_header = &adapter->ring_header;
 427
 428         atl1_clean_tx_ring(adapter);
 429         atl1_clean_rx_ring(adapter);
 430
 431         kfree(tpd_ring->buffer_info);
 432         pci_free_consistent(pdev, ring_header->size, ring_header->desc,
 433                 ring_header->dma);
 434
 435         tpd_ring->buffer_info = NULL;
 436         tpd_ring->desc = NULL;
 437         tpd_ring->dma = 0;
 438
 439         rfd_ring->buffer_info = NULL;
 440         rfd_ring->desc = NULL;
 441         rfd_ring->dma = 0;
 442
 443         rrd_ring->desc = NULL;
 444         rrd_ring->dma = 0;
 445 }
 446
 447 static void atl1_setup_mac_ctrl(struct atl1_adapter *adapter)
 448 {
 449         u32 value;
 450         struct atl1_hw *hw = &adapter->hw;
 451         struct net_device *netdev = adapter->netdev;
 452         /* Config MAC CTRL Register */
 453         value = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
 454         /* duplex */
 455         if (FULL_DUPLEX == adapter->link_duplex)
 456                 value |= MAC_CTRL_DUPLX;
 457         /* speed */
 458         value |= ((u32) ((SPEED_1000 == adapter->link_speed) ?
 459                          MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
 460                   MAC_CTRL_SPEED_SHIFT);
 461         /* flow control */
 462         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
 463         /* PAD & CRC */
 464         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
 465         /* preamble length */
 466         value |= (((u32) adapter->hw.preamble_len
 467                    & MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
 468         /* vlan */
 469         if (adapter->vlgrp)
 470                 value |= MAC_CTRL_RMV_VLAN;
 471         /* rx checksum
 472            if (adapter->rx_csum)
 473            value |= MAC_CTRL_RX_CHKSUM_EN;
 474          */
 475         /* filter mode */
 476         value |= MAC_CTRL_BC_EN;
 477         if (netdev->flags & IFF_PROMISC)
 478                 value |= MAC_CTRL_PROMIS_EN;
 479         else if (netdev->flags & IFF_ALLMULTI)
 480                 value |= MAC_CTRL_MC_ALL_EN;
 481         /* value |= MAC_CTRL_LOOPBACK; */
 482         iowrite32(value, hw->hw_addr + REG_MAC_CTRL);
 483 }
 484
 485 /*
 486  * atl1_set_mac - Change the Ethernet Address of the NIC
 487  * @netdev: network interface device structure
 488  * @p: pointer to an address structure
 489  *
 490  * Returns 0 on success, negative on failure
 491  */
 492 static int atl1_set_mac(struct net_device *netdev, void *p)
 493 {
 494         struct atl1_adapter *adapter = netdev_priv(netdev);
 495         struct sockaddr *addr = p;
 496
 497         if (netif_running(netdev))
 498                 return -EBUSY;
 499
 500         if (!is_valid_ether_addr(addr->sa_data))
 501                 return -EADDRNOTAVAIL;
 502
 503         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 504         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 505
 506         atl1_set_mac_addr(&adapter->hw);
 507         return 0;
 508 }
 509
 510 static u32 atl1_check_link(struct atl1_adapter *adapter)
 511 {
 512         struct atl1_hw *hw = &adapter->hw;
 513         struct net_device *netdev = adapter->netdev;
 514         u32 ret_val;
 515         u16 speed, duplex, phy_data;
 516         int reconfig = 0;
 517
 518         /* MII_BMSR must read twice */
 519         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
 520         atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
 521         if (!(phy_data & BMSR_LSTATUS)) {       /* link down */
 522                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 523                         dev_info(&adapter->pdev->dev, "link is down\n");
 524                         adapter->link_speed = SPEED_0;
 525                         netif_carrier_off(netdev);
 526                         netif_stop_queue(netdev);
 527                 }
 528                 return ATL1_SUCCESS;
 529         }
 530
 531         /* Link Up */
 532         ret_val = atl1_get_speed_and_duplex(hw, &speed, &duplex);
 533         if (ret_val)
 534                 return ret_val;
 535
 536         switch (hw->media_type) {
 537         case MEDIA_TYPE_1000M_FULL:
 538                 if (speed != SPEED_1000 || duplex != FULL_DUPLEX)
 539                         reconfig = 1;
 540                 break;
 541         case MEDIA_TYPE_100M_FULL:
 542                 if (speed != SPEED_100 || duplex != FULL_DUPLEX)
 543                         reconfig = 1;
 544                 break;
 545         case MEDIA_TYPE_100M_HALF:
 546                 if (speed != SPEED_100 || duplex != HALF_DUPLEX)
 547                         reconfig = 1;
 548                 break;
 549         case MEDIA_TYPE_10M_FULL:
 550                 if (speed != SPEED_10 || duplex != FULL_DUPLEX)
 551                         reconfig = 1;
 552                 break;
 553         case MEDIA_TYPE_10M_HALF:
 554                 if (speed != SPEED_10 || duplex != HALF_DUPLEX)
 555                         reconfig = 1;
 556                 break;
 557         }
 558
 559         /* link result is our setting */
 560         if (!reconfig) {
 561                 if (adapter->link_speed != speed
 562                     || adapter->link_duplex != duplex) {
 563                         adapter->link_speed = speed;
 564                         adapter->link_duplex = duplex;
 565                         atl1_setup_mac_ctrl(adapter);
 566                         dev_info(&adapter->pdev->dev,
 567                                 "%s link is up %d Mbps %s\n",
 568                                 netdev->name, adapter->link_speed,
 569                                 adapter->link_duplex == FULL_DUPLEX ?
 570                                 "full duplex" : "half duplex");
 571                 }
 572                 if (!netif_carrier_ok(netdev)) {        /* Link down -> Up */
 573                         netif_carrier_on(netdev);
 574                         netif_wake_queue(netdev);
 575                 }
 576                 return ATL1_SUCCESS;
 577         }
 578
 579         /* change orignal link status */
 580         if (netif_carrier_ok(netdev)) {
 581                 adapter->link_speed = SPEED_0;
 582                 netif_carrier_off(netdev);
 583                 netif_stop_queue(netdev);
 584         }
 585
 586         if (hw->media_type != MEDIA_TYPE_AUTO_SENSOR &&
 587             hw->media_type != MEDIA_TYPE_1000M_FULL) {
 588                 switch (hw->media_type) {
 589                 case MEDIA_TYPE_100M_FULL:
 590                         phy_data = MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
 591                                    MII_CR_RESET;
 592                         break;
 593                 case MEDIA_TYPE_100M_HALF:
 594                         phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
 595                         break;
 596                 case MEDIA_TYPE_10M_FULL:
 597                         phy_data =
 598                             MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
 599                         break;
 600                 default:        /* MEDIA_TYPE_10M_HALF: */
 601                         phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
 602                         break;
 603                 }
 604                 atl1_write_phy_reg(hw, MII_BMCR, phy_data);
 605                 return ATL1_SUCCESS;
 606         }
 607
 608         /* auto-neg, insert timer to re-config phy */
 609         if (!adapter->phy_timer_pending) {
 610                 adapter->phy_timer_pending = true;
 611                 mod_timer(&adapter->phy_config_timer, jiffies + 3 * HZ);
 612         }
 613
 614         return ATL1_SUCCESS;
 615 }
 616
 617 static void atl1_check_for_link(struct atl1_adapter *adapter)
 618 {
 619         struct net_device *netdev = adapter->netdev;
 620         u16 phy_data = 0;
 621
 622         spin_lock(&adapter->lock);
 623         adapter->phy_timer_pending = false;
 624         atl1_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 625         atl1_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 626         spin_unlock(&adapter->lock);
 627
 628         /* notify upper layer link down ASAP */
 629         if (!(phy_data & BMSR_LSTATUS)) {       /* Link Down */
 630                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 631                         dev_info(&adapter->pdev->dev, "%s link is down\n",
 632                                 netdev->name);
 633                         adapter->link_speed = SPEED_0;
 634                         netif_carrier_off(netdev);
 635                         netif_stop_queue(netdev);
 636                 }
 637         }
 638         schedule_work(&adapter->link_chg_task);
 639 }
 640
 641 /*
 642  * atl1_set_multi - Multicast and Promiscuous mode set
 643  * @netdev: network interface device structure
 644  *
 645  * The set_multi entry point is called whenever the multicast address
 646  * list or the network interface flags are updated.  This routine is
 647  * responsible for configuring the hardware for proper multicast,
 648  * promiscuous mode, and all-multi behavior.
 649  */
 650 static void atl1_set_multi(struct net_device *netdev)
 651 {
 652         struct atl1_adapter *adapter = netdev_priv(netdev);
 653         struct atl1_hw *hw = &adapter->hw;
 654         struct dev_mc_list *mc_ptr;
 655         u32 rctl;
 656         u32 hash_value;
 657
 658         /* Check for Promiscuous and All Multicast modes */
 659         rctl = ioread32(hw->hw_addr + REG_MAC_CTRL);
 660         if (netdev->flags & IFF_PROMISC)
 661                 rctl |= MAC_CTRL_PROMIS_EN;
 662         else if (netdev->flags & IFF_ALLMULTI) {
 663                 rctl |= MAC_CTRL_MC_ALL_EN;
 664                 rctl &= ~MAC_CTRL_PROMIS_EN;
 665         } else
 666                 rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 667
 668         iowrite32(rctl, hw->hw_addr + REG_MAC_CTRL);
 669
 670         /* clear the old settings from the multicast hash table */
 671         iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
 672         iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
 673
 674         /* compute mc addresses' hash value ,and put it into hash table */
 675         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 676                 hash_value = atl1_hash_mc_addr(hw, mc_ptr->dmi_addr);
 677                 atl1_hash_set(hw, hash_value);
 678         }
 679 }
 680
 681 /*
 682  * atl1_change_mtu - Change the Maximum Transfer Unit
 683  * @netdev: network interface device structure
 684  * @new_mtu: new value for maximum frame size
 685  *
 686  * Returns 0 on success, negative on failure
 687  */
 688 static int atl1_change_mtu(struct net_device *netdev, int new_mtu)
 689 {
 690         struct atl1_adapter *adapter = netdev_priv(netdev);
 691         int old_mtu = netdev->mtu;
 692         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
 693
 694         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 695             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 696                 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 697                 return -EINVAL;
 698         }
 699
 700         adapter->hw.max_frame_size = max_frame;
 701         adapter->hw.tx_jumbo_task_th = (max_frame + 7) >> 3;
 702         adapter->rx_buffer_len = (max_frame + 7) & ~7;
 703         adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;
 704
 705         netdev->mtu = new_mtu;
 706         if ((old_mtu != new_mtu) && netif_running(netdev)) {
 707                 atl1_down(adapter);
 708                 atl1_up(adapter);
 709         }
 710
 711         return 0;
 712 }
 713
 714 static void set_flow_ctrl_old(struct atl1_adapter *adapter)
 715 {
 716         u32 hi, lo, value;
 717
 718         /* RFD Flow Control */
 719         value = adapter->rfd_ring.count;
 720         hi = value / 16;
 721         if (hi < 2)
 722                 hi = 2;
 723         lo = value * 7 / 8;
 724
 725         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 726                 ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 727         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
 728
 729         /* RRD Flow Control */
 730         value = adapter->rrd_ring.count;
 731         lo = value / 16;
 732         hi = value * 7 / 8;
 733         if (lo < 2)
 734                 lo = 2;
 735         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
 736                 ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
 737         iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
 738 }
 739
 740 static void set_flow_ctrl_new(struct atl1_hw *hw)
 741 {
 742         u32 hi, lo, value;
 743
 744         /* RXF Flow Control */
 745         value = ioread32(hw->hw_addr + REG_SRAM_RXF_LEN);
 746         lo = value / 16;
 747         if (lo < 192)
 748                 lo = 192;
 749         hi = value * 7 / 8;
 750         if (hi < lo)
 751                 hi = lo + 16;
 752         value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 753                 ((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 754         iowrite32(value, hw->hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
 755
 756         /* RRD Flow Control */
 757         value = ioread32(hw->hw_addr + REG_SRAM_RRD_LEN);
 758         lo = value / 8;
 759         hi = value * 7 / 8;
 760         if (lo < 2)
 761                 lo = 2;
 762         if (hi < lo)
 763                 hi = lo + 3;
 764         value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
 765                 ((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
 766         iowrite32(value, hw->hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
 767 }
 768
 769 /*
 770  * atl1_configure - Configure Transmit&Receive Unit after Reset
 771  * @adapter: board private structure
 772  *
 773  * Configure the Tx /Rx unit of the MAC after a reset.
 774  */
 775 static u32 atl1_configure(struct atl1_adapter *adapter)
 776 {
 777         struct atl1_hw *hw = &adapter->hw;
 778         u32 value;
 779
 780         /* clear interrupt status */
 781         iowrite32(0xffffffff, adapter->hw.hw_addr + REG_ISR);
 782
 783         /* set MAC Address */
 784         value = (((u32) hw->mac_addr[2]) << 24) |
 785                 (((u32) hw->mac_addr[3]) << 16) |
 786                 (((u32) hw->mac_addr[4]) << 8) |
 787                 (((u32) hw->mac_addr[5]));
 788         iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
 789         value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
 790         iowrite32(value, hw->hw_addr + (REG_MAC_STA_ADDR + 4));
 791
 792         /* tx / rx ring */
 793
 794         /* HI base address */
 795         iowrite32((u32) ((adapter->tpd_ring.dma & 0xffffffff00000000ULL) >> 32),
 796                 hw->hw_addr + REG_DESC_BASE_ADDR_HI);
 797         /* LO base address */
 798         iowrite32((u32) (adapter->rfd_ring.dma & 0x00000000ffffffffULL),
 799                 hw->hw_addr + REG_DESC_RFD_ADDR_LO);
 800         iowrite32((u32) (adapter->rrd_ring.dma & 0x00000000ffffffffULL),
 801                 hw->hw_addr + REG_DESC_RRD_ADDR_LO);
 802         iowrite32((u32) (adapter->tpd_ring.dma & 0x00000000ffffffffULL),
 803                 hw->hw_addr + REG_DESC_TPD_ADDR_LO);
 804         iowrite32((u32) (adapter->cmb.dma & 0x00000000ffffffffULL),
 805                 hw->hw_addr + REG_DESC_CMB_ADDR_LO);
 806         iowrite32((u32) (adapter->smb.dma & 0x00000000ffffffffULL),
 807                 hw->hw_addr + REG_DESC_SMB_ADDR_LO);
 808
 809         /* element count */
 810         value = adapter->rrd_ring.count;
 811         value <<= 16;
 812         value += adapter->rfd_ring.count;
 813         iowrite32(value, hw->hw_addr + REG_DESC_RFD_RRD_RING_SIZE);
 814         iowrite32(adapter->tpd_ring.count, hw->hw_addr +
 815                 REG_DESC_TPD_RING_SIZE);
 816
 817         /* Load Ptr */
 818         iowrite32(1, hw->hw_addr + REG_LOAD_PTR);
 819
 820         /* config Mailbox */
 821         value = ((atomic_read(&adapter->tpd_ring.next_to_use)
 822                   & MB_TPD_PROD_INDX_MASK) << MB_TPD_PROD_INDX_SHIFT) |
 823                 ((atomic_read(&adapter->rrd_ring.next_to_clean)
 824                 & MB_RRD_CONS_INDX_MASK) << MB_RRD_CONS_INDX_SHIFT) |
 825                 ((atomic_read(&adapter->rfd_ring.next_to_use)
 826                 & MB_RFD_PROD_INDX_MASK) << MB_RFD_PROD_INDX_SHIFT);
 827         iowrite32(value, hw->hw_addr + REG_MAILBOX);
 828
 829         /* config IPG/IFG */
 830         value = (((u32) hw->ipgt & MAC_IPG_IFG_IPGT_MASK)
 831                  << MAC_IPG_IFG_IPGT_SHIFT) |
 832                 (((u32) hw->min_ifg & MAC_IPG_IFG_MIFG_MASK)
 833                 << MAC_IPG_IFG_MIFG_SHIFT) |
 834                 (((u32) hw->ipgr1 & MAC_IPG_IFG_IPGR1_MASK)
 835                 << MAC_IPG_IFG_IPGR1_SHIFT) |
 836                 (((u32) hw->ipgr2 & MAC_IPG_IFG_IPGR2_MASK)
 837                 << MAC_IPG_IFG_IPGR2_SHIFT);
 838         iowrite32(value, hw->hw_addr + REG_MAC_IPG_IFG);
 839
 840         /* config  Half-Duplex Control */
 841         value = ((u32) hw->lcol & MAC_HALF_DUPLX_CTRL_LCOL_MASK) |
 842                 (((u32) hw->max_retry & MAC_HALF_DUPLX_CTRL_RETRY_MASK)
 843                 << MAC_HALF_DUPLX_CTRL_RETRY_SHIFT) |
 844                 MAC_HALF_DUPLX_CTRL_EXC_DEF_EN |
 845                 (0xa << MAC_HALF_DUPLX_CTRL_ABEBT_SHIFT) |
 846                 (((u32) hw->jam_ipg & MAC_HALF_DUPLX_CTRL_JAMIPG_MASK)
 847                 << MAC_HALF_DUPLX_CTRL_JAMIPG_SHIFT);
 848         iowrite32(value, hw->hw_addr + REG_MAC_HALF_DUPLX_CTRL);
 849
 850         /* set Interrupt Moderator Timer */
 851         iowrite16(adapter->imt, hw->hw_addr + REG_IRQ_MODU_TIMER_INIT);
 852         iowrite32(MASTER_CTRL_ITIMER_EN, hw->hw_addr + REG_MASTER_CTRL);
 853
 854         /* set Interrupt Clear Timer */
 855         iowrite16(adapter->ict, hw->hw_addr + REG_CMBDISDMA_TIMER);
 856
 857         /* set MTU, 4 : VLAN */
 858         iowrite32(hw->max_frame_size + 4, hw->hw_addr + REG_MTU);
 859
 860         /* jumbo size & rrd retirement timer */
 861         value = (((u32) hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK)
 862                  << RXQ_JMBOSZ_TH_SHIFT) |
 863                 (((u32) hw->rx_jumbo_lkah & RXQ_JMBO_LKAH_MASK)
 864                 << RXQ_JMBO_LKAH_SHIFT) |
 865                 (((u32) hw->rrd_ret_timer & RXQ_RRD_TIMER_MASK)
 866                 << RXQ_RRD_TIMER_SHIFT);
 867         iowrite32(value, hw->hw_addr + REG_RXQ_JMBOSZ_RRDTIM);
 868
 869         /* Flow Control */
 870         switch (hw->dev_rev) {
 871         case 0x8001:
 872         case 0x9001:
 873         case 0x9002:
 874         case 0x9003:
 875                 set_flow_ctrl_old(adapter);
 876                 break;
 877         default:
 878                 set_flow_ctrl_new(hw);
 879                 break;
 880         }
 881
 882         /* config TXQ */
 883         value = (((u32) hw->tpd_burst & TXQ_CTRL_TPD_BURST_NUM_MASK)
 884                  << TXQ_CTRL_TPD_BURST_NUM_SHIFT) |
 885                 (((u32) hw->txf_burst & TXQ_CTRL_TXF_BURST_NUM_MASK)
 886                 << TXQ_CTRL_TXF_BURST_NUM_SHIFT) |
 887                 (((u32) hw->tpd_fetch_th & TXQ_CTRL_TPD_FETCH_TH_MASK)
 888                 << TXQ_CTRL_TPD_FETCH_TH_SHIFT) | TXQ_CTRL_ENH_MODE |
 889                 TXQ_CTRL_EN;
 890         iowrite32(value, hw->hw_addr + REG_TXQ_CTRL);
 891
 892         /* min tpd fetch gap & tx jumbo packet size threshold for taskoffload */
 893         value = (((u32) hw->tx_jumbo_task_th & TX_JUMBO_TASK_TH_MASK)
 894                 << TX_JUMBO_TASK_TH_SHIFT) |
 895                 (((u32) hw->tpd_fetch_gap & TX_TPD_MIN_IPG_MASK)
 896                 << TX_TPD_MIN_IPG_SHIFT);
 897         iowrite32(value, hw->hw_addr + REG_TX_JUMBO_TASK_TH_TPD_IPG);
 898
 899         /* config RXQ */
 900         value = (((u32) hw->rfd_burst & RXQ_CTRL_RFD_BURST_NUM_MASK)
 901                 << RXQ_CTRL_RFD_BURST_NUM_SHIFT) |
 902                 (((u32) hw->rrd_burst & RXQ_CTRL_RRD_BURST_THRESH_MASK)
 903                 << RXQ_CTRL_RRD_BURST_THRESH_SHIFT) |
 904                 (((u32) hw->rfd_fetch_gap & RXQ_CTRL_RFD_PREF_MIN_IPG_MASK)
 905                 << RXQ_CTRL_RFD_PREF_MIN_IPG_SHIFT) | RXQ_CTRL_CUT_THRU_EN |
 906                 RXQ_CTRL_EN;
 907         iowrite32(value, hw->hw_addr + REG_RXQ_CTRL);
 908
 909         /* config DMA Engine */
 910         value = ((((u32) hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
 911                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
 912                 ((((u32) hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
 913                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT) | DMA_CTRL_DMAR_EN |
 914                 DMA_CTRL_DMAW_EN;
 915         value |= (u32) hw->dma_ord;
 916         if (atl1_rcb_128 == hw->rcb_value)
 917                 value |= DMA_CTRL_RCB_VALUE;
 918         iowrite32(value, hw->hw_addr + REG_DMA_CTRL);
 919
 920         /* config CMB / SMB */
 921         value = (hw->cmb_tpd > adapter->tpd_ring.count) ?
 922                 hw->cmb_tpd : adapter->tpd_ring.count;
 923         value <<= 16;
 924         value |= hw->cmb_rrd;
 925         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TH);
 926         value = hw->cmb_rx_timer | ((u32) hw->cmb_tx_timer << 16);
 927         iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TIMER);
 928         iowrite32(hw->smb_timer, hw->hw_addr + REG_SMB_TIMER);
 929
 930         /* --- enable CMB / SMB */
 931         value = CSMB_CTRL_CMB_EN | CSMB_CTRL_SMB_EN;
 932         iowrite32(value, hw->hw_addr + REG_CSMB_CTRL);
 933
 934         value = ioread32(adapter->hw.hw_addr + REG_ISR);
 935         if (unlikely((value & ISR_PHY_LINKDOWN) != 0))
 936                 value = 1;      /* config failed */
 937         else
 938                 value = 0;
 939
 940         /* clear all interrupt status */
 941         iowrite32(0x3fffffff, adapter->hw.hw_addr + REG_ISR);
 942         iowrite32(0, adapter->hw.hw_addr + REG_ISR);
 943         return value;
 944 }
 945
 946 /*
 947  * atl1_pcie_patch - Patch for PCIE module
 948  */
 949 static void atl1_pcie_patch(struct atl1_adapter *adapter)
 950 {
 951         u32 value;
 952
 953         /* much vendor magic here */
 954         value = 0x6500;
 955         iowrite32(value, adapter->hw.hw_addr + 0x12FC);
 956         /* pcie flow control mode change */
 957         value = ioread32(adapter->hw.hw_addr + 0x1008);
 958         value |= 0x8000;
 959         iowrite32(value, adapter->hw.hw_addr + 0x1008);
 960 }
 961
 962 /*
 963  * When ACPI resume on some VIA MotherBoard, the Interrupt Disable bit/0x400
 964  * on PCI Command register is disable.
 965  * The function enable this bit.
 966  * Brackett, 2006/03/15
 967  */
 968 static void atl1_via_workaround(struct atl1_adapter *adapter)
 969 {
 970         unsigned long value;
 971
 972         value = ioread16(adapter->hw.hw_addr + PCI_COMMAND);
 973         if (value & PCI_COMMAND_INTX_DISABLE)
 974                 value &= ~PCI_COMMAND_INTX_DISABLE;
 975         iowrite32(value, adapter->hw.hw_addr + PCI_COMMAND);
 976 }
 977
 978 /*
 979  * atl1_irq_enable - Enable default interrupt generation settings
 980  * @adapter: board private structure
 981  */
 982 static void atl1_irq_enable(struct atl1_adapter *adapter)
 983 {
 984         iowrite32(IMR_NORMAL_MASK, adapter->hw.hw_addr + REG_IMR);
 985         ioread32(adapter->hw.hw_addr + REG_IMR);
 986 }
 987
 988 /*
 989  * atl1_irq_disable - Mask off interrupt generation on the NIC
 990  * @adapter: board private structure
 991  */
 992 static void atl1_irq_disable(struct atl1_adapter *adapter)
 993 {
 994         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
 995         ioread32(adapter->hw.hw_addr + REG_IMR);
 996         synchronize_irq(adapter->pdev->irq);
 997 }
 998
 999 static void atl1_clear_phy_int(struct atl1_adapter *adapter)
1000 {
1001         u16 phy_data;
1002         unsigned long flags;
1003
1004         spin_lock_irqsave(&adapter->lock, flags);
1005         atl1_read_phy_reg(&adapter->hw, 19, &phy_data);
1006         spin_unlock_irqrestore(&adapter->lock, flags);
1007 }
1008
1009 static void atl1_inc_smb(struct atl1_adapter *adapter)
1010 {
1011         struct stats_msg_block *smb = adapter->smb.smb;
1012
1013         /* Fill out the OS statistics structure */
1014         adapter->soft_stats.rx_packets += smb->rx_ok;
1015         adapter->soft_stats.tx_packets += smb->tx_ok;
1016         adapter->soft_stats.rx_bytes += smb->rx_byte_cnt;
1017         adapter->soft_stats.tx_bytes += smb->tx_byte_cnt;
1018         adapter->soft_stats.multicast += smb->rx_mcast;
1019         adapter->soft_stats.collisions += (smb->tx_1_col + smb->tx_2_col * 2 +
1020                 smb->tx_late_col + smb->tx_abort_col * adapter->hw.max_retry);
1021
1022         /* Rx Errors */
1023         adapter->soft_stats.rx_errors += (smb->rx_frag + smb->rx_fcs_err +
1024                 smb->rx_len_err + smb->rx_sz_ov + smb->rx_rxf_ov +
1025                 smb->rx_rrd_ov + smb->rx_align_err);
1026         adapter->soft_stats.rx_fifo_errors += smb->rx_rxf_ov;
1027         adapter->soft_stats.rx_length_errors += smb->rx_len_err;
1028         adapter->soft_stats.rx_crc_errors += smb->rx_fcs_err;
1029         adapter->soft_stats.rx_frame_errors += smb->rx_align_err;
1030         adapter->soft_stats.rx_missed_errors += (smb->rx_rrd_ov +
1031                 smb->rx_rxf_ov);
1032
1033         adapter->soft_stats.rx_pause += smb->rx_pause;
1034         adapter->soft_stats.rx_rrd_ov += smb->rx_rrd_ov;
1035         adapter->soft_stats.rx_trunc += smb->rx_sz_ov;
1036
1037         /* Tx Errors */
1038         adapter->soft_stats.tx_errors += (smb->tx_late_col +
1039                 smb->tx_abort_col + smb->tx_underrun + smb->tx_trunc);
1040         adapter->soft_stats.tx_fifo_errors += smb->tx_underrun;
1041         adapter->soft_stats.tx_aborted_errors += smb->tx_abort_col;
1042         adapter->soft_stats.tx_window_errors += smb->tx_late_col;
1043
1044         adapter->soft_stats.excecol += smb->tx_abort_col;
1045         adapter->soft_stats.deffer += smb->tx_defer;
1046         adapter->soft_stats.scc += smb->tx_1_col;
1047         adapter->soft_stats.mcc += smb->tx_2_col;
1048         adapter->soft_stats.latecol += smb->tx_late_col;
1049         adapter->soft_stats.tx_underun += smb->tx_underrun;
1050         adapter->soft_stats.tx_trunc += smb->tx_trunc;
1051         adapter->soft_stats.tx_pause += smb->tx_pause;
1052
1053         adapter->net_stats.rx_packets = adapter->soft_stats.rx_packets;
1054         adapter->net_stats.tx_packets = adapter->soft_stats.tx_packets;
1055         adapter->net_stats.rx_bytes = adapter->soft_stats.rx_bytes;
1056         adapter->net_stats.tx_bytes = adapter->soft_stats.tx_bytes;
1057         adapter->net_stats.multicast = adapter->soft_stats.multicast;
1058         adapter->net_stats.collisions = adapter->soft_stats.collisions;
1059         adapter->net_stats.rx_errors = adapter->soft_stats.rx_errors;
1060         adapter->net_stats.rx_over_errors =
1061                 adapter->soft_stats.rx_missed_errors;
1062         adapter->net_stats.rx_length_errors =
1063                 adapter->soft_stats.rx_length_errors;
1064         adapter->net_stats.rx_crc_errors = adapter->soft_stats.rx_crc_errors;
1065         adapter->net_stats.rx_frame_errors =
1066                 adapter->soft_stats.rx_frame_errors;
1067         adapter->net_stats.rx_fifo_errors = adapter->soft_stats.rx_fifo_errors;
1068         adapter->net_stats.rx_missed_errors =
1069                 adapter->soft_stats.rx_missed_errors;
1070         adapter->net_stats.tx_errors = adapter->soft_stats.tx_errors;
1071         adapter->net_stats.tx_fifo_errors = adapter->soft_stats.tx_fifo_errors;
1072         adapter->net_stats.tx_aborted_errors =
1073                 adapter->soft_stats.tx_aborted_errors;
1074         adapter->net_stats.tx_window_errors =
1075                 adapter->soft_stats.tx_window_errors;
1076         adapter->net_stats.tx_carrier_errors =
1077                 adapter->soft_stats.tx_carrier_errors;
1078 }
1079
1080 /*
1081  * atl1_get_stats - Get System Network Statistics
1082  * @netdev: network interface device structure
1083  *
1084  * Returns the address of the device statistics structure.
1085  * The statistics are actually updated from the timer callback.
1086  */
1087 static struct net_device_stats *atl1_get_stats(struct net_device *netdev)
1088 {
1089         struct atl1_adapter *adapter = netdev_priv(netdev);
1090         return &adapter->net_stats;
1091 }
1092
1093 static void atl1_update_mailbox(struct atl1_adapter *adapter)
1094 {
1095         unsigned long flags;
1096         u32 tpd_next_to_use;
1097         u32 rfd_next_to_use;
1098         u32 rrd_next_to_clean;
1099         u32 value;
1100
1101         spin_lock_irqsave(&adapter->mb_lock, flags);
1102
1103         tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
1104         rfd_next_to_use = atomic_read(&adapter->rfd_ring.next_to_use);
1105         rrd_next_to_clean = atomic_read(&adapter->rrd_ring.next_to_clean);
1106
1107         value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
1108                 MB_RFD_PROD_INDX_SHIFT) |
1109                 ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
1110                 MB_RRD_CONS_INDX_SHIFT) |
1111                 ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
1112                 MB_TPD_PROD_INDX_SHIFT);
1113         iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
1114
1115         spin_unlock_irqrestore(&adapter->mb_lock, flags);
1116 }
1117
1118 static void atl1_clean_alloc_flag(struct atl1_adapter *adapter,
1119         struct rx_return_desc *rrd, u16 offset)
1120 {
1121         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1122
1123         while (rfd_ring->next_to_clean != (rrd->buf_indx + offset)) {
1124                 rfd_ring->buffer_info[rfd_ring->next_to_clean].alloced = 0;
1125                 if (++rfd_ring->next_to_clean == rfd_ring->count) {
1126                         rfd_ring->next_to_clean = 0;
1127                 }
1128         }
1129 }
1130
1131 static void atl1_update_rfd_index(struct atl1_adapter *adapter,
1132         struct rx_return_desc *rrd)
1133 {
1134         u16 num_buf;
1135
1136         num_buf = (rrd->xsz.xsum_sz.pkt_size + adapter->rx_buffer_len - 1) /
1137                 adapter->rx_buffer_len;
1138         if (rrd->num_buf == num_buf)
1139                 /* clean alloc flag for bad rrd */
1140                 atl1_clean_alloc_flag(adapter, rrd, num_buf);
1141 }
1142
1143 static void atl1_rx_checksum(struct atl1_adapter *adapter,
1144         struct rx_return_desc *rrd, struct sk_buff *skb)
1145 {
1146         struct pci_dev *pdev = adapter->pdev;
1147
1148         skb->ip_summed = CHECKSUM_NONE;
1149
1150         if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
1151                 if (rrd->err_flg & (ERR_FLAG_CRC | ERR_FLAG_TRUNC |
1152                                         ERR_FLAG_CODE | ERR_FLAG_OV)) {
1153                         adapter->hw_csum_err++;
1154                         dev_printk(KERN_DEBUG, &pdev->dev,
1155                                 "rx checksum error\n");
1156                         return;
1157                 }
1158         }
1159
1160         /* not IPv4 */
1161         if (!(rrd->pkt_flg & PACKET_FLAG_IPV4))
1162                 /* checksum is invalid, but it's not an IPv4 pkt, so ok */
1163                 return;
1164
1165         /* IPv4 packet */
1166         if (likely(!(rrd->err_flg &
1167                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM)))) {
1168                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1169                 adapter->hw_csum_good++;
1170                 return;
1171         }
1172
1173         /* IPv4, but hardware thinks its checksum is wrong */
1174         dev_printk(KERN_DEBUG, &pdev->dev,
1175                 "hw csum wrong, pkt_flag:%x, err_flag:%x\n",
1176                 rrd->pkt_flg, rrd->err_flg);
1177         skb->ip_summed = CHECKSUM_COMPLETE;
1178         skb->csum = htons(rrd->xsz.xsum_sz.rx_chksum);
1179         adapter->hw_csum_err++;
1180         return;
1181 }
1182
1183 /*
1184  * atl1_alloc_rx_buffers - Replace used receive buffers
1185  * @adapter: address of board private structure
1186  */
1187 static u16 atl1_alloc_rx_buffers(struct atl1_adapter *adapter)
1188 {
1189         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1190         struct pci_dev *pdev = adapter->pdev;
1191         struct page *page;
1192         unsigned long offset;
1193         struct atl1_buffer *buffer_info, *next_info;
1194         struct sk_buff *skb;
1195         u16 num_alloc = 0;
1196         u16 rfd_next_to_use, next_next;
1197         struct rx_free_desc *rfd_desc;
1198
1199         next_next = rfd_next_to_use = atomic_read(&rfd_ring->next_to_use);
1200         if (++next_next == rfd_ring->count)
1201                 next_next = 0;
1202         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1203         next_info = &rfd_ring->buffer_info[next_next];
1204
1205         while (!buffer_info->alloced && !next_info->alloced) {
1206                 if (buffer_info->skb) {
1207                         buffer_info->alloced = 1;
1208                         goto next;
1209                 }
1210
1211                 rfd_desc = ATL1_RFD_DESC(rfd_ring, rfd_next_to_use);
1212
1213                 skb = dev_alloc_skb(adapter->rx_buffer_len + NET_IP_ALIGN);
1214                 if (unlikely(!skb)) {   /* Better luck next round */
1215                         adapter->net_stats.rx_dropped++;
1216                         break;
1217                 }
1218
1219                 /*
1220                  * Make buffer alignment 2 beyond a 16 byte boundary
1221                  * this will result in a 16 byte aligned IP header after
1222                  * the 14 byte MAC header is removed
1223                  */
1224                 skb_reserve(skb, NET_IP_ALIGN);
1225
1226                 buffer_info->alloced = 1;
1227                 buffer_info->skb = skb;
1228                 buffer_info->length = (u16) adapter->rx_buffer_len;
1229                 page = virt_to_page(skb->data);
1230                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1231                 buffer_info->dma = pci_map_page(pdev, page, offset,
1232                                                 adapter->rx_buffer_len,
1233                                                 PCI_DMA_FROMDEVICE);
1234                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1235                 rfd_desc->buf_len = cpu_to_le16(adapter->rx_buffer_len);
1236                 rfd_desc->coalese = 0;
1237
1238 next:
1239                 rfd_next_to_use = next_next;
1240                 if (unlikely(++next_next == rfd_ring->count))
1241                         next_next = 0;
1242
1243                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1244                 next_info = &rfd_ring->buffer_info[next_next];
1245                 num_alloc++;
1246         }
1247
1248         if (num_alloc) {
1249                 /*
1250                  * Force memory writes to complete before letting h/w
1251                  * know there are new descriptors to fetch.  (Only
1252                  * applicable for weak-ordered memory model archs,
1253                  * such as IA-64).
1254                  */
1255                 wmb();
1256                 atomic_set(&rfd_ring->next_to_use, (int)rfd_next_to_use);
1257         }
1258         return num_alloc;
1259 }
1260
1261 static void atl1_intr_rx(struct atl1_adapter *adapter)
1262 {
1263         int i, count;
1264         u16 length;
1265         u16 rrd_next_to_clean;
1266         u32 value;
1267         struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1268         struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1269         struct atl1_buffer *buffer_info;
1270         struct rx_return_desc *rrd;
1271         struct sk_buff *skb;
1272
1273         count = 0;
1274
1275         rrd_next_to_clean = atomic_read(&rrd_ring->next_to_clean);
1276
1277         while (1) {
1278                 rrd = ATL1_RRD_DESC(rrd_ring, rrd_next_to_clean);
1279                 i = 1;
1280                 if (likely(rrd->xsz.valid)) {   /* packet valid */
1281 chk_rrd:
1282                         /* check rrd status */
1283                         if (likely(rrd->num_buf == 1))
1284                                 goto rrd_ok;
1285
1286                         /* rrd seems to be bad */
1287                         if (unlikely(i-- > 0)) {
1288                                 /* rrd may not be DMAed completely */
1289                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1290                                         "incomplete RRD DMA transfer\n");
1291                                 udelay(1);
1292                                 goto chk_rrd;
1293                         }
1294                         /* bad rrd */
1295                         dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1296                                 "bad RRD\n");
1297                         /* see if update RFD index */
1298                         if (rrd->num_buf > 1)
1299                                 atl1_update_rfd_index(adapter, rrd);
1300
1301                         /* update rrd */
1302                         rrd->xsz.valid = 0;
1303                         if (++rrd_next_to_clean == rrd_ring->count)
1304                                 rrd_next_to_clean = 0;
1305                         count++;
1306                         continue;
1307                 } else {        /* current rrd still not be updated */
1308
1309                         break;
1310                 }
1311 rrd_ok:
1312                 /* clean alloc flag for bad rrd */
1313                 atl1_clean_alloc_flag(adapter, rrd, 0);
1314
1315                 buffer_info = &rfd_ring->buffer_info[rrd->buf_indx];
1316                 if (++rfd_ring->next_to_clean == rfd_ring->count)
1317                         rfd_ring->next_to_clean = 0;
1318
1319                 /* update rrd next to clean */
1320                 if (++rrd_next_to_clean == rrd_ring->count)
1321                         rrd_next_to_clean = 0;
1322                 count++;
1323
1324                 if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
1325                         if (!(rrd->err_flg &
1326                                 (ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM
1327                                 | ERR_FLAG_LEN))) {
1328                                 /* packet error, don't need upstream */
1329                                 buffer_info->alloced = 0;
1330                                 rrd->xsz.valid = 0;
1331                                 continue;
1332                         }
1333                 }
1334
1335                 /* Good Receive */
1336                 pci_unmap_page(adapter->pdev, buffer_info->dma,
1337                                buffer_info->length, PCI_DMA_FROMDEVICE);
1338                 skb = buffer_info->skb;
1339                 length = le16_to_cpu(rrd->xsz.xsum_sz.pkt_size);
1340
1341                 skb_put(skb, length - ETH_FCS_LEN);
1342
1343                 /* Receive Checksum Offload */
1344                 atl1_rx_checksum(adapter, rrd, skb);
1345                 skb->protocol = eth_type_trans(skb, adapter->netdev);
1346
1347                 if (adapter->vlgrp && (rrd->pkt_flg & PACKET_FLAG_VLAN_INS)) {
1348                         u16 vlan_tag = (rrd->vlan_tag >> 4) |
1349                                         ((rrd->vlan_tag & 7) << 13) |
1350                                         ((rrd->vlan_tag & 8) << 9);
1351                         vlan_hwaccel_rx(skb, adapter->vlgrp, vlan_tag);
1352                 } else
1353                         netif_rx(skb);
1354
1355                 /* let protocol layer free skb */
1356                 buffer_info->skb = NULL;
1357                 buffer_info->alloced = 0;
1358                 rrd->xsz.valid = 0;
1359
1360                 adapter->netdev->last_rx = jiffies;
1361         }
1362
1363         atomic_set(&rrd_ring->next_to_clean, rrd_next_to_clean);
1364
1365         atl1_alloc_rx_buffers(adapter);
1366
1367         /* update mailbox ? */
1368         if (count) {
1369                 u32 tpd_next_to_use;
1370                 u32 rfd_next_to_use;
1371                 u32 rrd_next_to_clean;
1372
1373                 spin_lock(&adapter->mb_lock);
1374
1375                 tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
1376                 rfd_next_to_use =
1377                     atomic_read(&adapter->rfd_ring.next_to_use);
1378                 rrd_next_to_clean =
1379                     atomic_read(&adapter->rrd_ring.next_to_clean);
1380                 value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
1381                         MB_RFD_PROD_INDX_SHIFT) |
1382                         ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
1383                         MB_RRD_CONS_INDX_SHIFT) |
1384                         ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
1385                         MB_TPD_PROD_INDX_SHIFT);
1386                 iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
1387                 spin_unlock(&adapter->mb_lock);
1388         }
1389 }
1390
1391 static void atl1_intr_tx(struct atl1_adapter *adapter)
1392 {
1393         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1394         struct atl1_buffer *buffer_info;
1395         u16 sw_tpd_next_to_clean;
1396         u16 cmb_tpd_next_to_clean;
1397
1398         sw_tpd_next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1399         cmb_tpd_next_to_clean = le16_to_cpu(adapter->cmb.cmb->tpd_cons_idx);
1400
1401         while (cmb_tpd_next_to_clean != sw_tpd_next_to_clean) {
1402                 struct tx_packet_desc *tpd;
1403
1404                 tpd = ATL1_TPD_DESC(tpd_ring, sw_tpd_next_to_clean);
1405                 buffer_info = &tpd_ring->buffer_info[sw_tpd_next_to_clean];
1406                 if (buffer_info->dma) {
1407                         pci_unmap_page(adapter->pdev, buffer_info->dma,
1408                                        buffer_info->length, PCI_DMA_TODEVICE);
1409                         buffer_info->dma = 0;
1410                 }
1411
1412                 if (buffer_info->skb) {
1413                         dev_kfree_skb_irq(buffer_info->skb);
1414                         buffer_info->skb = NULL;
1415                 }
1416                 tpd->buffer_addr = 0;
1417                 tpd->desc.data = 0;
1418
1419                 if (++sw_tpd_next_to_clean == tpd_ring->count)
1420                         sw_tpd_next_to_clean = 0;
1421         }
1422         atomic_set(&tpd_ring->next_to_clean, sw_tpd_next_to_clean);
1423
1424         if (netif_queue_stopped(adapter->netdev)
1425             && netif_carrier_ok(adapter->netdev))
1426                 netif_wake_queue(adapter->netdev);
1427 }
1428
1429 static u16 atl1_tpd_avail(struct atl1_tpd_ring *tpd_ring)
1430 {
1431         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1432         u16 next_to_use = atomic_read(&tpd_ring->next_to_use);
1433         return ((next_to_clean > next_to_use) ?
1434                 next_to_clean - next_to_use - 1 :
1435                 tpd_ring->count + next_to_clean - next_to_use - 1);
1436 }
1437
1438 static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
1439                          struct tso_param *tso)
1440 {
1441         /* We enter this function holding a spinlock. */
1442         u8 ipofst;
1443         int err;
1444
1445         if (skb_shinfo(skb)->gso_size) {
1446                 if (skb_header_cloned(skb)) {
1447                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1448                         if (unlikely(err))
1449                                 return err;
1450                 }
1451
1452                 if (skb->protocol == ntohs(ETH_P_IP)) {
1453                         struct iphdr *iph = ip_hdr(skb);
1454
1455                         iph->tot_len = 0;
1456                         iph->check = 0;
1457                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1458                                 iph->daddr, 0, IPPROTO_TCP, 0);
1459                         ipofst = skb_network_offset(skb);
1460                         if (ipofst != ETH_HLEN) /* 802.3 frame */
1461                                 tso->tsopl |= 1 << TSO_PARAM_ETHTYPE_SHIFT;
1462
1463                         tso->tsopl |= (iph->ihl &
1464                                 CSUM_PARAM_IPHL_MASK) << CSUM_PARAM_IPHL_SHIFT;
1465                         tso->tsopl |= (tcp_hdrlen(skb) &
1466                                 TSO_PARAM_TCPHDRLEN_MASK) <<
1467                                 TSO_PARAM_TCPHDRLEN_SHIFT;
1468                         tso->tsopl |= (skb_shinfo(skb)->gso_size &
1469                                 TSO_PARAM_MSS_MASK) << TSO_PARAM_MSS_SHIFT;
1470                         tso->tsopl |= 1 << TSO_PARAM_IPCKSUM_SHIFT;
1471                         tso->tsopl |= 1 << TSO_PARAM_TCPCKSUM_SHIFT;
1472                         tso->tsopl |= 1 << TSO_PARAM_SEGMENT_SHIFT;
1473                         return true;
1474                 }
1475         }
1476         return false;
1477 }
1478
1479 static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
1480         struct csum_param *csum)
1481 {
1482         u8 css, cso;
1483
1484         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1485                 cso = skb_transport_offset(skb);
1486                 css = cso + skb->csum_offset;
1487                 if (unlikely(cso & 0x1)) {
1488                         dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1489                                 "payload offset not an even number\n");
1490                         return -1;
1491                 }
1492                 csum->csumpl |= (cso & CSUM_PARAM_PLOADOFFSET_MASK) <<
1493                         CSUM_PARAM_PLOADOFFSET_SHIFT;
1494                 csum->csumpl |= (css & CSUM_PARAM_XSUMOFFSET_MASK) <<
1495                         CSUM_PARAM_XSUMOFFSET_SHIFT;
1496                 csum->csumpl |= 1 << CSUM_PARAM_CUSTOMCKSUM_SHIFT;
1497                 return true;
1498         }
1499
1500         return true;
1501 }
1502
1503 static void atl1_tx_map(struct atl1_adapter *adapter, struct sk_buff *skb,
1504         bool tcp_seg)
1505 {
1506         /* We enter this function holding a spinlock. */
1507         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1508         struct atl1_buffer *buffer_info;
1509         struct page *page;
1510         int first_buf_len = skb->len;
1511         unsigned long offset;
1512         unsigned int nr_frags;
1513         unsigned int f;
1514         u16 tpd_next_to_use;
1515         u16 proto_hdr_len;
1516         u16 i, m, len12;
1517
1518         first_buf_len -= skb->data_len;
1519         nr_frags = skb_shinfo(skb)->nr_frags;
1520         tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
1521         buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1522         if (unlikely(buffer_info->skb))
1523                 BUG();
1524         buffer_info->skb = NULL;        /* put skb in last TPD */
1525
1526         if (tcp_seg) {
1527                 /* TSO/GSO */
1528                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1529                 buffer_info->length = proto_hdr_len;
1530                 page = virt_to_page(skb->data);
1531                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1532                 buffer_info->dma = pci_map_page(adapter->pdev, page,
1533                                                 offset, proto_hdr_len,
1534                                                 PCI_DMA_TODEVICE);
1535
1536                 if (++tpd_next_to_use == tpd_ring->count)
1537                         tpd_next_to_use = 0;
1538
1539                 if (first_buf_len > proto_hdr_len) {
1540                         len12 = first_buf_len - proto_hdr_len;
1541                         m = (len12 + ATL1_MAX_TX_BUF_LEN - 1) /
1542                                 ATL1_MAX_TX_BUF_LEN;
1543                         for (i = 0; i < m; i++) {
1544                                 buffer_info =
1545                                     &tpd_ring->buffer_info[tpd_next_to_use];
1546                                 buffer_info->skb = NULL;
1547                                 buffer_info->length =
1548                                     (ATL1_MAX_TX_BUF_LEN >=
1549                                      len12) ? ATL1_MAX_TX_BUF_LEN : len12;
1550                                 len12 -= buffer_info->length;
1551                                 page = virt_to_page(skb->data +
1552                                         (proto_hdr_len +
1553                                         i * ATL1_MAX_TX_BUF_LEN));
1554                                 offset = (unsigned long)(skb->data +
1555                                         (proto_hdr_len +
1556                                         i * ATL1_MAX_TX_BUF_LEN)) & ~PAGE_MASK;
1557                                 buffer_info->dma = pci_map_page(adapter->pdev,
1558                                         page, offset, buffer_info->length,
1559                                         PCI_DMA_TODEVICE);
1560                                 if (++tpd_next_to_use == tpd_ring->count)
1561                                         tpd_next_to_use = 0;
1562                         }
1563                 }
1564         } else {
1565                 /* not TSO/GSO */
1566                 buffer_info->length = first_buf_len;
1567                 page = virt_to_page(skb->data);
1568                 offset = (unsigned long)skb->data & ~PAGE_MASK;
1569                 buffer_info->dma = pci_map_page(adapter->pdev, page,
1570                         offset, first_buf_len, PCI_DMA_TODEVICE);
1571                 if (++tpd_next_to_use == tpd_ring->count)
1572                         tpd_next_to_use = 0;
1573         }
1574
1575         for (f = 0; f < nr_frags; f++) {
1576                 struct skb_frag_struct *frag;
1577                 u16 lenf, i, m;
1578
1579                 frag = &skb_shinfo(skb)->frags[f];
1580                 lenf = frag->size;
1581
1582                 m = (lenf + ATL1_MAX_TX_BUF_LEN - 1) / ATL1_MAX_TX_BUF_LEN;
1583                 for (i = 0; i < m; i++) {
1584                         buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1585                         if (unlikely(buffer_info->skb))
1586                                 BUG();
1587                         buffer_info->skb = NULL;
1588                         buffer_info->length = (lenf > ATL1_MAX_TX_BUF_LEN) ?
1589                                 ATL1_MAX_TX_BUF_LEN : lenf;
1590                         lenf -= buffer_info->length;
1591                         buffer_info->dma = pci_map_page(adapter->pdev,
1592                                 frag->page,
1593                                 frag->page_offset + (i * ATL1_MAX_TX_BUF_LEN),
1594                                 buffer_info->length, PCI_DMA_TODEVICE);
1595
1596                         if (++tpd_next_to_use == tpd_ring->count)
1597                                 tpd_next_to_use = 0;
1598                 }
1599         }
1600
1601         /* last tpd's buffer-info */
1602         buffer_info->skb = skb;
1603 }
1604
1605 static void atl1_tx_queue(struct atl1_adapter *adapter, int count,
1606        union tpd_descr *descr)
1607 {
1608         /* We enter this function holding a spinlock. */
1609         struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1610         int j;
1611         u32 val;
1612         struct atl1_buffer *buffer_info;
1613         struct tx_packet_desc *tpd;
1614         u16 tpd_next_to_use = atomic_read(&tpd_ring->next_to_use);
1615
1616         for (j = 0; j < count; j++) {
1617                 buffer_info = &tpd_ring->buffer_info[tpd_next_to_use];
1618                 tpd = ATL1_TPD_DESC(&adapter->tpd_ring, tpd_next_to_use);
1619                 tpd->desc.csum.csumpu = descr->csum.csumpu;
1620                 tpd->desc.csum.csumpl = descr->csum.csumpl;
1621                 tpd->desc.tso.tsopu = descr->tso.tsopu;
1622                 tpd->desc.tso.tsopl = descr->tso.tsopl;
1623                 tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1624                 tpd->desc.data = descr->data;
1625                 tpd->desc.csum.csumpu |= (cpu_to_le16(buffer_info->length) &
1626                         CSUM_PARAM_BUFLEN_MASK) << CSUM_PARAM_BUFLEN_SHIFT;
1627
1628                 val = (descr->tso.tsopl >> TSO_PARAM_SEGMENT_SHIFT) &
1629                         TSO_PARAM_SEGMENT_MASK;
1630                 if (val && !j)
1631                         tpd->desc.tso.tsopl |= 1 << TSO_PARAM_HDRFLAG_SHIFT;
1632
1633                 if (j == (count - 1))
1634                         tpd->desc.csum.csumpl |= 1 << CSUM_PARAM_EOP_SHIFT;
1635
1636                 if (++tpd_next_to_use == tpd_ring->count)
1637                         tpd_next_to_use = 0;
1638         }
1639         /*
1640          * Force memory writes to complete before letting h/w
1641          * know there are new descriptors to fetch.  (Only
1642          * applicable for weak-ordered memory model archs,
1643          * such as IA-64).
1644          */
1645         wmb();
1646
1647         atomic_set(&tpd_ring->next_to_use, (int)tpd_next_to_use);
1648 }
1649
1650 static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1651 {
1652         struct atl1_adapter *adapter = netdev_priv(netdev);
1653         int len = skb->len;
1654         int tso;
1655         int count = 1;
1656         int ret_val;
1657         u32 val;
1658         union tpd_descr param;
1659         u16 frag_size;
1660         u16 vlan_tag;
1661         unsigned long flags;
1662         unsigned int nr_frags = 0;
1663         unsigned int mss = 0;
1664         unsigned int f;
1665         unsigned int proto_hdr_len;
1666
1667         len -= skb->data_len;
1668
1669         if (unlikely(skb->len == 0)) {
1670                 dev_kfree_skb_any(skb);
1671                 return NETDEV_TX_OK;
1672         }
1673
1674         param.data = 0;
1675         param.tso.tsopu = 0;
1676         param.tso.tsopl = 0;
1677         param.csum.csumpu = 0;
1678         param.csum.csumpl = 0;
1679
1680         /* nr_frags will be nonzero if we're doing scatter/gather (SG) */
1681         nr_frags = skb_shinfo(skb)->nr_frags;
1682         for (f = 0; f < nr_frags; f++) {
1683                 frag_size = skb_shinfo(skb)->frags[f].size;
1684                 if (frag_size)
1685                         count += (frag_size + ATL1_MAX_TX_BUF_LEN - 1) /
1686                                 ATL1_MAX_TX_BUF_LEN;
1687         }
1688
1689         /* mss will be nonzero if we're doing segment offload (TSO/GSO) */
1690         mss = skb_shinfo(skb)->gso_size;
1691         if (mss) {
1692                 if (skb->protocol == htons(ETH_P_IP)) {
1693                         proto_hdr_len = (skb_transport_offset(skb) +
1694                                          tcp_hdrlen(skb));
1695                         if (unlikely(proto_hdr_len > len)) {
1696                                 dev_kfree_skb_any(skb);
1697                                 return NETDEV_TX_OK;
1698                         }
1699                         /* need additional TPD ? */
1700                         if (proto_hdr_len != len)
1701                                 count += (len - proto_hdr_len +
1702                                         ATL1_MAX_TX_BUF_LEN - 1) /
1703                                         ATL1_MAX_TX_BUF_LEN;
1704                 }
1705         }
1706
1707         if (!spin_trylock_irqsave(&adapter->lock, flags)) {
1708                 /* Can't get lock - tell upper layer to requeue */
1709                 dev_printk(KERN_DEBUG, &adapter->pdev->dev, "tx locked\n");
1710                 return NETDEV_TX_LOCKED;
1711         }
1712
1713         if (atl1_tpd_avail(&adapter->tpd_ring) < count) {
1714                 /* not enough descriptors */
1715                 netif_stop_queue(netdev);
1716                 spin_unlock_irqrestore(&adapter->lock, flags);
1717                 dev_printk(KERN_DEBUG, &adapter->pdev->dev, "tx busy\n");
1718                 return NETDEV_TX_BUSY;
1719         }
1720
1721         param.data = 0;
1722
1723         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
1724                 vlan_tag = vlan_tx_tag_get(skb);
1725                 vlan_tag = (vlan_tag << 4) | (vlan_tag >> 13) |
1726                         ((vlan_tag >> 9) & 0x8);
1727                 param.csum.csumpl |= 1 << CSUM_PARAM_INSVLAG_SHIFT;
1728                 param.csum.csumpu |= (vlan_tag & CSUM_PARAM_VALANTAG_MASK) <<
1729                         CSUM_PARAM_VALAN_SHIFT;
1730         }
1731
1732         tso = atl1_tso(adapter, skb, &param.tso);
1733         if (tso < 0) {
1734                 spin_unlock_irqrestore(&adapter->lock, flags);
1735                 dev_kfree_skb_any(skb);
1736                 return NETDEV_TX_OK;
1737         }
1738
1739         if (!tso) {
1740                 ret_val = atl1_tx_csum(adapter, skb, &param.csum);
1741                 if (ret_val < 0) {
1742                         spin_unlock_irqrestore(&adapter->lock, flags);
1743                         dev_kfree_skb_any(skb);
1744                         return NETDEV_TX_OK;
1745                 }
1746         }
1747
1748         val = (param.csum.csumpl >> CSUM_PARAM_SEGMENT_SHIFT) &
1749                 CSUM_PARAM_SEGMENT_MASK;
1750         atl1_tx_map(adapter, skb, 1 == val);
1751         atl1_tx_queue(adapter, count, &param);
1752         netdev->trans_start = jiffies;
1753         spin_unlock_irqrestore(&adapter->lock, flags);
1754         atl1_update_mailbox(adapter);
1755         return NETDEV_TX_OK;
1756 }
1757
1758 /*
1759  * atl1_intr - Interrupt Handler
1760  * @irq: interrupt number
1761  * @data: pointer to a network interface device structure
1762  * @pt_regs: CPU registers structure
1763  */
1764 static irqreturn_t atl1_intr(int irq, void *data)
1765 {
1766         struct atl1_adapter *adapter = netdev_priv(data);
1767         u32 status;
1768         u8 update_rx;
1769         int max_ints = 10;
1770
1771         status = adapter->cmb.cmb->int_stats;
1772         if (!status)
1773                 return IRQ_NONE;
1774
1775         update_rx = 0;
1776
1777         do {
1778                 /* clear CMB interrupt status at once */
1779                 adapter->cmb.cmb->int_stats = 0;
1780
1781                 if (status & ISR_GPHY)  /* clear phy status */
1782                         atl1_clear_phy_int(adapter);
1783
1784                 /* clear ISR status, and Enable CMB DMA/Disable Interrupt */
1785                 iowrite32(status | ISR_DIS_INT, adapter->hw.hw_addr + REG_ISR);
1786
1787                 /* check if SMB intr */
1788                 if (status & ISR_SMB)
1789                         atl1_inc_smb(adapter);
1790
1791                 /* check if PCIE PHY Link down */
1792                 if (status & ISR_PHY_LINKDOWN) {
1793                         dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1794                                 "pcie phy link down %x\n", status);
1795                         if (netif_running(adapter->netdev)) {   /* reset MAC */
1796                                 iowrite32(0, adapter->hw.hw_addr + REG_IMR);
1797                                 schedule_work(&adapter->pcie_dma_to_rst_task);
1798                                 return IRQ_HANDLED;
1799                         }
1800                 }
1801
1802                 /* check if DMA read/write error ? */
1803                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1804                         dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1805                                 "pcie DMA r/w error (status = 0x%x)\n",
1806                                 status);
1807                         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
1808                         schedule_work(&adapter->pcie_dma_to_rst_task);
1809                         return IRQ_HANDLED;
1810                 }
1811
1812                 /* link event */
1813                 if (status & ISR_GPHY) {
1814                         adapter->soft_stats.tx_carrier_errors++;
1815                         atl1_check_for_link(adapter);
1816                 }
1817
1818                 /* transmit event */
1819                 if (status & ISR_CMB_TX)
1820                         atl1_intr_tx(adapter);
1821
1822                 /* rx exception */
1823                 if (unlikely(status & (ISR_RXF_OV | ISR_RFD_UNRUN |
1824                         ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
1825                         ISR_HOST_RRD_OV | ISR_CMB_RX))) {
1826                         if (status & (ISR_RXF_OV | ISR_RFD_UNRUN |
1827                                 ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
1828                                 ISR_HOST_RRD_OV))
1829                                 dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1830                                         "rx exception, ISR = 0x%x\n", status);
1831                         atl1_intr_rx(adapter);
1832                 }
1833
1834                 if (--max_ints < 0)
1835                         break;
1836
1837         } while ((status = adapter->cmb.cmb->int_stats));
1838
1839         /* re-enable Interrupt */
1840         iowrite32(ISR_DIS_SMB | ISR_DIS_DMA, adapter->hw.hw_addr + REG_ISR);
1841         return IRQ_HANDLED;
1842 }
1843
1844 /*
1845  * atl1_watchdog - Timer Call-back
1846  * @data: pointer to netdev cast into an unsigned long
1847  */
1848 static void atl1_watchdog(unsigned long data)
1849 {
1850         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
1851
1852         /* Reset the timer */
1853         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1854 }
1855
1856 /*
1857  * atl1_phy_config - Timer Call-back
1858  * @data: pointer to netdev cast into an unsigned long
1859  */
1860 static void atl1_phy_config(unsigned long data)
1861 {
1862         struct atl1_adapter *adapter = (struct atl1_adapter *)data;
1863         struct atl1_hw *hw = &adapter->hw;
1864         unsigned long flags;
1865
1866         spin_lock_irqsave(&adapter->lock, flags);
1867         adapter->phy_timer_pending = false;
1868         atl1_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
1869         atl1_write_phy_reg(hw, MII_AT001_CR, hw->mii_1000t_ctrl_reg);
1870         atl1_write_phy_reg(hw, MII_BMCR, MII_CR_RESET | MII_CR_AUTO_NEG_EN);
1871         spin_unlock_irqrestore(&adapter->lock, flags);
1872 }
1873
1874 /*
1875  * atl1_tx_timeout - Respond to a Tx Hang
1876  * @netdev: network interface device structure
1877  */
1878 static void atl1_tx_timeout(struct net_device *netdev)
1879 {
1880         struct atl1_adapter *adapter = netdev_priv(netdev);
1881         /* Do the reset outside of interrupt context */
1882         schedule_work(&adapter->tx_timeout_task);
1883 }
1884
1885 /*
1886  * Orphaned vendor comment left intact here:
1887  * <vendor comment>
1888  * If TPD Buffer size equal to 0, PCIE DMAR_TO_INT
1889  * will assert. We do soft reset <0x1400=1> according
1890  * with the SPEC. BUT, it seemes that PCIE or DMA
1891  * state-machine will not be reset. DMAR_TO_INT will
1892  * assert again and again.
1893  * </vendor comment>
1894  */
1895 static void atl1_tx_timeout_task(struct work_struct *work)
1896 {
1897         struct atl1_adapter *adapter =
1898                 container_of(work, struct atl1_adapter, tx_timeout_task);
1899         struct net_device *netdev = adapter->netdev;
1900
1901         netif_device_detach(netdev);
1902         atl1_down(adapter);
1903         atl1_up(adapter);
1904         netif_device_attach(netdev);
1905 }
1906
1907 /*
1908  * atl1_link_chg_task - deal with link change event Out of interrupt context
1909  */
1910 static void atl1_link_chg_task(struct work_struct *work)
1911 {
1912         struct atl1_adapter *adapter =
1913                container_of(work, struct atl1_adapter, link_chg_task);
1914         unsigned long flags;
1915
1916         spin_lock_irqsave(&adapter->lock, flags);
1917         atl1_check_link(adapter);
1918         spin_unlock_irqrestore(&adapter->lock, flags);
1919 }
1920
1921 static void atl1_vlan_rx_register(struct net_device *netdev,
1922         struct vlan_group *grp)
1923 {
1924         struct atl1_adapter *adapter = netdev_priv(netdev);
1925         unsigned long flags;
1926         u32 ctrl;
1927
1928         spin_lock_irqsave(&adapter->lock, flags);
1929         /* atl1_irq_disable(adapter); */
1930         adapter->vlgrp = grp;
1931
1932         if (grp) {
1933                 /* enable VLAN tag insert/strip */
1934                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
1935                 ctrl |= MAC_CTRL_RMV_VLAN;
1936                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
1937         } else {
1938                 /* disable VLAN tag insert/strip */
1939                 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
1940                 ctrl &= ~MAC_CTRL_RMV_VLAN;
1941                 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
1942         }
1943
1944         /* atl1_irq_enable(adapter); */
1945         spin_unlock_irqrestore(&adapter->lock, flags);
1946 }
1947
1948 static void atl1_restore_vlan(struct atl1_adapter *adapter)
1949 {
1950         atl1_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1951 }
1952
1953 int atl1_reset(struct atl1_adapter *adapter)
1954 {
1955         int ret;
1956
1957         ret = atl1_reset_hw(&adapter->hw);
1958         if (ret != ATL1_SUCCESS)
1959                 return ret;
1960         return atl1_init_hw(&adapter->hw);
1961 }
1962
1963 s32 atl1_up(struct atl1_adapter *adapter)
1964 {
1965         struct net_device *netdev = adapter->netdev;
1966         int err;
1967         int irq_flags = IRQF_SAMPLE_RANDOM;
1968
1969         /* hardware has been reset, we need to reload some things */
1970         atl1_set_multi(netdev);
1971         atl1_init_ring_ptrs(adapter);
1972         atl1_restore_vlan(adapter);
1973         err = atl1_alloc_rx_buffers(adapter);
1974         if (unlikely(!err))             /* no RX BUFFER allocated */
1975                 return -ENOMEM;
1976
1977         if (unlikely(atl1_configure(adapter))) {
1978                 err = -EIO;
1979                 goto err_up;
1980         }
1981
1982         err = pci_enable_msi(adapter->pdev);
1983         if (err) {
1984                 dev_info(&adapter->pdev->dev,
1985                         "Unable to enable MSI: %d\n", err);
1986                 irq_flags |= IRQF_SHARED;
1987         }
1988
1989         err = request_irq(adapter->pdev->irq, &atl1_intr, irq_flags,
1990                         netdev->name, netdev);
1991         if (unlikely(err))
1992                 goto err_up;
1993
1994         mod_timer(&adapter->watchdog_timer, jiffies);
1995         atl1_irq_enable(adapter);
1996         atl1_check_link(adapter);
1997         return 0;
1998
1999 err_up:
2000         pci_disable_msi(adapter->pdev);
2001         /* free rx_buffers */
2002         atl1_clean_rx_ring(adapter);
2003         return err;
2004 }
2005
2006 void atl1_down(struct atl1_adapter *adapter)
2007 {
2008         struct net_device *netdev = adapter->netdev;
2009
2010         del_timer_sync(&adapter->watchdog_timer);
2011         del_timer_sync(&adapter->phy_config_timer);
2012         adapter->phy_timer_pending = false;
2013
2014         atl1_irq_disable(adapter);
2015         free_irq(adapter->pdev->irq, netdev);
2016         pci_disable_msi(adapter->pdev);
2017         atl1_reset_hw(&adapter->hw);
2018         adapter->cmb.cmb->int_stats = 0;
2019
2020         adapter->link_speed = SPEED_0;
2021         adapter->link_duplex = -1;
2022         netif_carrier_off(netdev);
2023         netif_stop_queue(netdev);
2024
2025         atl1_clean_tx_ring(adapter);
2026         atl1_clean_rx_ring(adapter);
2027 }
2028
2029 /*
2030  * atl1_open - Called when a network interface is made active
2031  * @netdev: network interface device structure
2032  *
2033  * Returns 0 on success, negative value on failure
2034  *
2035  * The open entry point is called when a network interface is made
2036  * active by the system (IFF_UP).  At this point all resources needed
2037  * for transmit and receive operations are allocated, the interrupt
2038  * handler is registered with the OS, the watchdog timer is started,
2039  * and the stack is notified that the interface is ready.
2040  */
2041 static int atl1_open(struct net_device *netdev)
2042 {
2043         struct atl1_adapter *adapter = netdev_priv(netdev);
2044         int err;
2045
2046         /* allocate transmit descriptors */
2047         err = atl1_setup_ring_resources(adapter);
2048         if (err)
2049                 return err;
2050
2051         err = atl1_up(adapter);
2052         if (err)
2053                 goto err_up;
2054
2055         return 0;
2056
2057 err_up:
2058         atl1_reset(adapter);
2059         return err;
2060 }
2061
2062 /*
2063  * atl1_close - Disables a network interface
2064  * @netdev: network interface device structure
2065  *
2066  * Returns 0, this is not allowed to fail
2067  *
2068  * The close entry point is called when an interface is de-activated
2069  * by the OS.  The hardware is still under the drivers control, but
2070  * needs to be disabled.  A global MAC reset is issued to stop the
2071  * hardware, and all transmit and receive resources are freed.
2072  */
2073 static int atl1_close(struct net_device *netdev)
2074 {
2075         struct atl1_adapter *adapter = netdev_priv(netdev);
2076         atl1_down(adapter);
2077         atl1_free_ring_resources(adapter);
2078         return 0;
2079 }
2080
2081 #ifdef CONFIG_PM
2082 static int atl1_suspend(struct pci_dev *pdev, pm_message_t state)
2083 {
2084         struct net_device *netdev = pci_get_drvdata(pdev);
2085         struct atl1_adapter *adapter = netdev_priv(netdev);
2086         struct atl1_hw *hw = &adapter->hw;
2087         u32 ctrl = 0;
2088         u32 wufc = adapter->wol;
2089
2090         netif_device_detach(netdev);
2091         if (netif_running(netdev))
2092                 atl1_down(adapter);
2093
2094         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2095         atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2096         if (ctrl & BMSR_LSTATUS)
2097                 wufc &= ~ATL1_WUFC_LNKC;
2098
2099         /* reduce speed to 10/100M */
2100         if (wufc) {
2101                 atl1_phy_enter_power_saving(hw);
2102                 /* if resume, let driver to re- setup link */
2103                 hw->phy_configured = false;
2104                 atl1_set_mac_addr(hw);
2105                 atl1_set_multi(netdev);
2106
2107                 ctrl = 0;
2108                 /* turn on magic packet wol */
2109                 if (wufc & ATL1_WUFC_MAG)
2110                         ctrl = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2111
2112                 /* turn on Link change WOL */
2113                 if (wufc & ATL1_WUFC_LNKC)
2114                         ctrl |= (WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN);
2115                 iowrite32(ctrl, hw->hw_addr + REG_WOL_CTRL);
2116
2117                 /* turn on all-multi mode if wake on multicast is enabled */
2118                 ctrl = ioread32(hw->hw_addr + REG_MAC_CTRL);
2119                 ctrl &= ~MAC_CTRL_DBG;
2120                 ctrl &= ~MAC_CTRL_PROMIS_EN;
2121                 if (wufc & ATL1_WUFC_MC)
2122                         ctrl |= MAC_CTRL_MC_ALL_EN;
2123                 else
2124                         ctrl &= ~MAC_CTRL_MC_ALL_EN;
2125
2126                 /* turn on broadcast mode if wake on-BC is enabled */
2127                 if (wufc & ATL1_WUFC_BC)
2128                         ctrl |= MAC_CTRL_BC_EN;
2129                 else
2130                         ctrl &= ~MAC_CTRL_BC_EN;
2131
2132                 /* enable RX */
2133                 ctrl |= MAC_CTRL_RX_EN;
2134                 iowrite32(ctrl, hw->hw_addr + REG_MAC_CTRL);
2135                 pci_enable_wake(pdev, PCI_D3hot, 1);
2136                 pci_enable_wake(pdev, PCI_D3cold, 1);
2137         } else {
2138                 iowrite32(0, hw->hw_addr + REG_WOL_CTRL);
2139                 pci_enable_wake(pdev, PCI_D3hot, 0);
2140                 pci_enable_wake(pdev, PCI_D3cold, 0);
2141         }
2142
2143         pci_save_state(pdev);
2144         pci_disable_device(pdev);
2145
2146         pci_set_power_state(pdev, PCI_D3hot);
2147
2148         return 0;
2149 }
2150
2151 static int atl1_resume(struct pci_dev *pdev)
2152 {
2153         struct net_device *netdev = pci_get_drvdata(pdev);
2154         struct atl1_adapter *adapter = netdev_priv(netdev);
2155         u32 ret_val;
2156
2157         pci_set_power_state(pdev, 0);
2158         pci_restore_state(pdev);
2159
2160         ret_val = pci_enable_device(pdev);
2161         pci_enable_wake(pdev, PCI_D3hot, 0);
2162         pci_enable_wake(pdev, PCI_D3cold, 0);
2163
2164         iowrite32(0, adapter->hw.hw_addr + REG_WOL_CTRL);
2165         atl1_reset(adapter);
2166
2167         if (netif_running(netdev))
2168                 atl1_up(adapter);
2169         netif_device_attach(netdev);
2170
2171         atl1_via_workaround(adapter);
2172
2173         return 0;
2174 }
2175 #else
2176 #define atl1_suspend NULL
2177 #define atl1_resume NULL
2178 #endif
2179
2180 #ifdef CONFIG_NET_POLL_CONTROLLER
2181 static void atl1_poll_controller(struct net_device *netdev)
2182 {
2183         disable_irq(netdev->irq);
2184         atl1_intr(netdev->irq, netdev);
2185         enable_irq(netdev->irq);
2186 }
2187 #endif
2188
2189 /*
2190  * atl1_probe - Device Initialization Routine
2191  * @pdev: PCI device information struct
2192  * @ent: entry in atl1_pci_tbl
2193  *
2194  * Returns 0 on success, negative on failure
2195  *
2196  * atl1_probe initializes an adapter identified by a pci_dev structure.
2197  * The OS initialization, configuring of the adapter private structure,
2198  * and a hardware reset occur.
2199  */
2200 static int __devinit atl1_probe(struct pci_dev *pdev,
2201         const struct pci_device_id *ent)
2202 {
2203         struct net_device *netdev;
2204         struct atl1_adapter *adapter;
2205         static int cards_found = 0;
2206         bool pci_using_64 = true;
2207         int err;
2208
2209         err = pci_enable_device(pdev);
2210         if (err)
2211                 return err;
2212
2213         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
2214         if (err) {
2215                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2216                 if (err) {
2217                         dev_err(&pdev->dev, "no usable DMA configuration\n");
2218                         goto err_dma;
2219                 }
2220                 pci_using_64 = false;
2221         }
2222         /* Mark all PCI regions associated with PCI device
2223          * pdev as being reserved by owner atl1_driver_name
2224          */
2225         err = pci_request_regions(pdev, atl1_driver_name);
2226         if (err)
2227                 goto err_request_regions;
2228
2229         /* Enables bus-mastering on the device and calls
2230          * pcibios_set_master to do the needed arch specific settings
2231          */
2232         pci_set_master(pdev);
2233
2234         netdev = alloc_etherdev(sizeof(struct atl1_adapter));
2235         if (!netdev) {
2236                 err = -ENOMEM;
2237                 goto err_alloc_etherdev;
2238         }
2239         SET_MODULE_OWNER(netdev);
2240         SET_NETDEV_DEV(netdev, &pdev->dev);
2241
2242         pci_set_drvdata(pdev, netdev);
2243         adapter = netdev_priv(netdev);
2244         adapter->netdev = netdev;
2245         adapter->pdev = pdev;
2246         adapter->hw.back = adapter;
2247
2248         adapter->hw.hw_addr = pci_iomap(pdev, 0, 0);
2249         if (!adapter->hw.hw_addr) {
2250                 err = -EIO;
2251                 goto err_pci_iomap;
2252         }
2253         /* get device revision number */
2254         adapter->hw.dev_rev = ioread16(adapter->hw.hw_addr +
2255                 (REG_MASTER_CTRL + 2));
2256         dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
2257
2258         /* set default ring resource counts */
2259         adapter->rfd_ring.count = adapter->rrd_ring.count = ATL1_DEFAULT_RFD;
2260         adapter->tpd_ring.count = ATL1_DEFAULT_TPD;
2261
2262         adapter->mii.dev = netdev;
2263         adapter->mii.mdio_read = mdio_read;
2264         adapter->mii.mdio_write = mdio_write;
2265         adapter->mii.phy_id_mask = 0x1f;
2266         adapter->mii.reg_num_mask = 0x1f;
2267
2268         netdev->open = &atl1_open;
2269         netdev->stop = &atl1_close;
2270         netdev->hard_start_xmit = &atl1_xmit_frame;
2271         netdev->get_stats = &atl1_get_stats;
2272         netdev->set_multicast_list = &atl1_set_multi;
2273         netdev->set_mac_address = &atl1_set_mac;
2274         netdev->change_mtu = &atl1_change_mtu;
2275         netdev->do_ioctl = &atl1_ioctl;
2276         netdev->tx_timeout = &atl1_tx_timeout;
2277         netdev->watchdog_timeo = 5 * HZ;
2278 #ifdef CONFIG_NET_POLL_CONTROLLER
2279         netdev->poll_controller = atl1_poll_controller;
2280 #endif
2281         netdev->vlan_rx_register = atl1_vlan_rx_register;
2282
2283         netdev->ethtool_ops = &atl1_ethtool_ops;
2284         adapter->bd_number = cards_found;
2285         adapter->pci_using_64 = pci_using_64;
2286
2287         /* setup the private structure */
2288         err = atl1_sw_init(adapter);
2289         if (err)
2290                 goto err_common;
2291
2292         netdev->features = NETIF_F_HW_CSUM;
2293         netdev->features |= NETIF_F_SG;
2294         netdev->features |= (NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
2295
2296         /*
2297          * FIXME - Until tso performance gets fixed, disable the feature.
2298          * Enable it with ethtool -K if desired.
2299          */
2300         /* netdev->features |= NETIF_F_TSO; */
2301
2302         if (pci_using_64)
2303                 netdev->features |= NETIF_F_HIGHDMA;
2304
2305         netdev->features |= NETIF_F_LLTX;
2306
2307         /*
2308          * patch for some L1 of old version,
2309          * the final version of L1 may not need these
2310          * patches
2311          */
2312         /* atl1_pcie_patch(adapter); */
2313
2314         /* really reset GPHY core */
2315         iowrite16(0, adapter->hw.hw_addr + REG_GPHY_ENABLE);
2316
2317         /*
2318          * reset the controller to
2319          * put the device in a known good starting state
2320          */
2321         if (atl1_reset_hw(&adapter->hw)) {
2322                 err = -EIO;
2323                 goto err_common;
2324         }
2325
2326         /* copy the MAC address out of the EEPROM */
2327         atl1_read_mac_addr(&adapter->hw);
2328         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2329
2330         if (!is_valid_ether_addr(netdev->dev_addr)) {
2331                 err = -EIO;
2332                 goto err_common;
2333         }
2334
2335         atl1_check_options(adapter);
2336
2337         /* pre-init the MAC, and setup link */
2338         err = atl1_init_hw(&adapter->hw);
2339         if (err) {
2340                 err = -EIO;
2341                 goto err_common;
2342         }
2343
2344         atl1_pcie_patch(adapter);
2345         /* assume we have no link for now */
2346         netif_carrier_off(netdev);
2347         netif_stop_queue(netdev);
2348
2349         init_timer(&adapter->watchdog_timer);
2350         adapter->watchdog_timer.function = &atl1_watchdog;
2351         adapter->watchdog_timer.data = (unsigned long)adapter;
2352
2353         init_timer(&adapter->phy_config_timer);
2354         adapter->phy_config_timer.function = &atl1_phy_config;
2355         adapter->phy_config_timer.data = (unsigned long)adapter;
2356         adapter->phy_timer_pending = false;
2357
2358         INIT_WORK(&adapter->tx_timeout_task, atl1_tx_timeout_task);
2359
2360         INIT_WORK(&adapter->link_chg_task, atl1_link_chg_task);
2361
2362         INIT_WORK(&adapter->pcie_dma_to_rst_task, atl1_tx_timeout_task);
2363
2364         err = register_netdev(netdev);
2365         if (err)
2366                 goto err_common;
2367
2368         cards_found++;
2369         atl1_via_workaround(adapter);
2370         return 0;
2371
2372 err_common:
2373         pci_iounmap(pdev, adapter->hw.hw_addr);
2374 err_pci_iomap:
2375         free_netdev(netdev);
2376 err_alloc_etherdev:
2377         pci_release_regions(pdev);
2378 err_dma:
2379 err_request_regions:
2380         pci_disable_device(pdev);
2381         return err;
2382 }
2383
2384 /*
2385  * atl1_remove - Device Removal Routine
2386  * @pdev: PCI device information struct
2387  *
2388  * atl1_remove is called by the PCI subsystem to alert the driver
2389  * that it should release a PCI device.  The could be caused by a
2390  * Hot-Plug event, or because the driver is going to be removed from
2391  * memory.
2392  */
2393 static void __devexit atl1_remove(struct pci_dev *pdev)
2394 {
2395         struct net_device *netdev = pci_get_drvdata(pdev);
2396         struct atl1_adapter *adapter;
2397         /* Device not available. Return. */
2398         if (!netdev)
2399                 return;
2400
2401         adapter = netdev_priv(netdev);
2402
2403         /* Some atl1 boards lack persistent storage for their MAC, and get it
2404          * from the BIOS during POST.  If we've been messing with the MAC
2405          * address, we need to save the permanent one.
2406          */
2407         if (memcmp(adapter->hw.mac_addr, adapter->hw.perm_mac_addr, ETH_ALEN)) {
2408                 memcpy(adapter->hw.mac_addr, adapter->hw.perm_mac_addr,
2409                         ETH_ALEN);
2410                 atl1_set_mac_addr(&adapter->hw);
2411         }
2412
2413         iowrite16(0, adapter->hw.hw_addr + REG_GPHY_ENABLE);
2414         unregister_netdev(netdev);
2415         pci_iounmap(pdev, adapter->hw.hw_addr);
2416         pci_release_regions(pdev);
2417         free_netdev(netdev);
2418         pci_disable_device(pdev);
2419 }
2420
2421 static struct pci_driver atl1_driver = {
2422         .name = atl1_driver_name,
2423         .id_table = atl1_pci_tbl,
2424         .probe = atl1_probe,
2425         .remove = __devexit_p(atl1_remove),
2426         .suspend = atl1_suspend,
2427         .resume = atl1_resume
2428 };
2429
2430 /*
2431  * atl1_exit_module - Driver Exit Cleanup Routine
2432  *
2433  * atl1_exit_module is called just before the driver is removed
2434  * from memory.
2435  */
2436 static void __exit atl1_exit_module(void)
2437 {
2438         pci_unregister_driver(&atl1_driver);
2439 }
2440
2441 /*
2442  * atl1_init_module - Driver Registration Routine
2443  *
2444  * atl1_init_module is the first routine called when the driver is
2445  * loaded. All it does is register with the PCI subsystem.
2446  */
2447 static int __init atl1_init_module(void)
2448 {
2449         return pci_register_driver(&atl1_driver);
2450 }
2451
2452 module_init(atl1_init_module);
2453 module_exit(atl1_exit_module);