drivers/net/atl1e/atl1e_main.c

   1 /*
   2  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1e.h"
  23
  24 #define DRV_VERSION "1.0.0.7-NAPI"
  25
  26 char atl1e_driver_name[] = "ATL1E";
  27 char atl1e_driver_version[] = DRV_VERSION;
  28 #define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
  29 /*
  30  * atl1e_pci_tbl - PCI Device ID Table
  31  *
  32  * Wildcard entries (PCI_ANY_ID) should come last
  33  * Last entry must be all 0s
  34  *
  35  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  36  *   Class, Class Mask, private data (not used) }
  37  */
  38 static DEFINE_PCI_DEVICE_TABLE(atl1e_pci_tbl) = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  45
  46 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(DRV_VERSION);
  50
  51 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  52
  53 static const u16
  54 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  55 {
  56         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  57         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  58         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  59         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  60 };
  61
  62 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  63 {
  64         REG_RXF0_BASE_ADDR_HI,
  65         REG_RXF1_BASE_ADDR_HI,
  66         REG_RXF2_BASE_ADDR_HI,
  67         REG_RXF3_BASE_ADDR_HI
  68 };
  69
  70 static const u16
  71 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  72 {
  73         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  74         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  75         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  76         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  77 };
  78
  79 static const u16
  80 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  81 {
  82         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  83         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  84         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  85         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  86 };
  87
  88 static const u16 atl1e_pay_load_size[] = {
  89         128, 256, 512, 1024, 2048, 4096,
  90 };
  91
  92 /*
  93  * atl1e_irq_enable - Enable default interrupt generation settings
  94  * @adapter: board private structure
  95  */
  96 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  97 {
  98         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  99                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 100                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
 101                 AT_WRITE_FLUSH(&adapter->hw);
 102         }
 103 }
 104
 105 /*
 106  * atl1e_irq_disable - Mask off interrupt generation on the NIC
 107  * @adapter: board private structure
 108  */
 109 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
 110 {
 111         atomic_inc(&adapter->irq_sem);
 112         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 113         AT_WRITE_FLUSH(&adapter->hw);
 114         synchronize_irq(adapter->pdev->irq);
 115 }
 116
 117 /*
 118  * atl1e_irq_reset - reset interrupt confiure on the NIC
 119  * @adapter: board private structure
 120  */
 121 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 122 {
 123         atomic_set(&adapter->irq_sem, 0);
 124         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 125         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 126         AT_WRITE_FLUSH(&adapter->hw);
 127 }
 128
 129 /*
 130  * atl1e_phy_config - Timer Call-back
 131  * @data: pointer to netdev cast into an unsigned long
 132  */
 133 static void atl1e_phy_config(unsigned long data)
 134 {
 135         struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
 136         struct atl1e_hw *hw = &adapter->hw;
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&adapter->mdio_lock, flags);
 140         atl1e_restart_autoneg(hw);
 141         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 142 }
 143
 144 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 145 {
 146
 147         WARN_ON(in_interrupt());
 148         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 149                 msleep(1);
 150         atl1e_down(adapter);
 151         atl1e_up(adapter);
 152         clear_bit(__AT_RESETTING, &adapter->flags);
 153 }
 154
 155 static void atl1e_reset_task(struct work_struct *work)
 156 {
 157         struct atl1e_adapter *adapter;
 158         adapter = container_of(work, struct atl1e_adapter, reset_task);
 159
 160         atl1e_reinit_locked(adapter);
 161 }
 162
 163 static int atl1e_check_link(struct atl1e_adapter *adapter)
 164 {
 165         struct atl1e_hw *hw = &adapter->hw;
 166         struct net_device *netdev = adapter->netdev;
 167         int err = 0;
 168         u16 speed, duplex, phy_data;
 169
 170         /* MII_BMSR must read twice */
 171         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 172         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 173         if ((phy_data & BMSR_LSTATUS) == 0) {
 174                 /* link down */
 175                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 176                         u32 value;
 177                         /* disable rx */
 178                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 179                         value &= ~MAC_CTRL_RX_EN;
 180                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 181                         adapter->link_speed = SPEED_0;
 182                         netif_carrier_off(netdev);
 183                         netif_stop_queue(netdev);
 184                 }
 185         } else {
 186                 /* Link Up */
 187                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 188                 if (unlikely(err))
 189                         return err;
 190
 191                 /* link result is our setting */
 192                 if (adapter->link_speed != speed ||
 193                     adapter->link_duplex != duplex) {
 194                         adapter->link_speed  = speed;
 195                         adapter->link_duplex = duplex;
 196                         atl1e_setup_mac_ctrl(adapter);
 197                         netdev_info(netdev,
 198                                     "NIC Link is Up <%d Mbps %s Duplex>\n",
 199                                     adapter->link_speed,
 200                                     adapter->link_duplex == FULL_DUPLEX ?
 201                                     "Full" : "Half");
 202                 }
 203
 204                 if (!netif_carrier_ok(netdev)) {
 205                         /* Link down -> Up */
 206                         netif_carrier_on(netdev);
 207                         netif_wake_queue(netdev);
 208                 }
 209         }
 210         return 0;
 211 }
 212
 213 /*
 214  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 215  * @netdev: network interface device structure
 216  */
 217 static void atl1e_link_chg_task(struct work_struct *work)
 218 {
 219         struct atl1e_adapter *adapter;
 220         unsigned long flags;
 221
 222         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 223         spin_lock_irqsave(&adapter->mdio_lock, flags);
 224         atl1e_check_link(adapter);
 225         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 226 }
 227
 228 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 229 {
 230         struct net_device *netdev = adapter->netdev;
 231         u16 phy_data = 0;
 232         u16 link_up = 0;
 233
 234         spin_lock(&adapter->mdio_lock);
 235         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 236         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 237         spin_unlock(&adapter->mdio_lock);
 238         link_up = phy_data & BMSR_LSTATUS;
 239         /* notify upper layer link down ASAP */
 240         if (!link_up) {
 241                 if (netif_carrier_ok(netdev)) {
 242                         /* old link state: Up */
 243                         netdev_info(netdev, "NIC Link is Down\n");
 244                         adapter->link_speed = SPEED_0;
 245                         netif_stop_queue(netdev);
 246                 }
 247         }
 248         schedule_work(&adapter->link_chg_task);
 249 }
 250
 251 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 252 {
 253         del_timer_sync(&adapter->phy_config_timer);
 254 }
 255
 256 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 257 {
 258         cancel_work_sync(&adapter->reset_task);
 259         cancel_work_sync(&adapter->link_chg_task);
 260 }
 261
 262 /*
 263  * atl1e_tx_timeout - Respond to a Tx Hang
 264  * @netdev: network interface device structure
 265  */
 266 static void atl1e_tx_timeout(struct net_device *netdev)
 267 {
 268         struct atl1e_adapter *adapter = netdev_priv(netdev);
 269
 270         /* Do the reset outside of interrupt context */
 271         schedule_work(&adapter->reset_task);
 272 }
 273
 274 /*
 275  * atl1e_set_multi - Multicast and Promiscuous mode set
 276  * @netdev: network interface device structure
 277  *
 278  * The set_multi entry point is called whenever the multicast address
 279  * list or the network interface flags are updated.  This routine is
 280  * responsible for configuring the hardware for proper multicast,
 281  * promiscuous mode, and all-multi behavior.
 282  */
 283 static void atl1e_set_multi(struct net_device *netdev)
 284 {
 285         struct atl1e_adapter *adapter = netdev_priv(netdev);
 286         struct atl1e_hw *hw = &adapter->hw;
 287         struct netdev_hw_addr *ha;
 288         u32 mac_ctrl_data = 0;
 289         u32 hash_value;
 290
 291         /* Check for Promiscuous and All Multicast modes */
 292         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 293
 294         if (netdev->flags & IFF_PROMISC) {
 295                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 296         } else if (netdev->flags & IFF_ALLMULTI) {
 297                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 298                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 299         } else {
 300                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 301         }
 302
 303         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 304
 305         /* clear the old settings from the multicast hash table */
 306         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 307         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 308
 309         /* comoute mc addresses' hash value ,and put it into hash table */
 310         netdev_for_each_mc_addr(ha, netdev) {
 311                 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 312                 atl1e_hash_set(hw, hash_value);
 313         }
 314 }
 315
 316 static void atl1e_vlan_rx_register(struct net_device *netdev,
 317                                    struct vlan_group *grp)
 318 {
 319         struct atl1e_adapter *adapter = netdev_priv(netdev);
 320         u32 mac_ctrl_data = 0;
 321
 322         netdev_dbg(adapter->netdev, "%s\n", __func__);
 323
 324         atl1e_irq_disable(adapter);
 325
 326         adapter->vlgrp = grp;
 327         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 328
 329         if (grp) {
 330                 /* enable VLAN tag insert/strip */
 331                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 332         } else {
 333                 /* disable VLAN tag insert/strip */
 334                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 335         }
 336
 337         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 338         atl1e_irq_enable(adapter);
 339 }
 340
 341 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 342 {
 343         netdev_dbg(adapter->netdev, "%s\n", __func__);
 344         atl1e_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 345 }
 346 /*
 347  * atl1e_set_mac - Change the Ethernet Address of the NIC
 348  * @netdev: network interface device structure
 349  * @p: pointer to an address structure
 350  *
 351  * Returns 0 on success, negative on failure
 352  */
 353 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 354 {
 355         struct atl1e_adapter *adapter = netdev_priv(netdev);
 356         struct sockaddr *addr = p;
 357
 358         if (!is_valid_ether_addr(addr->sa_data))
 359                 return -EADDRNOTAVAIL;
 360
 361         if (netif_running(netdev))
 362                 return -EBUSY;
 363
 364         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 365         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 366
 367         atl1e_hw_set_mac_addr(&adapter->hw);
 368
 369         return 0;
 370 }
 371
 372 /*
 373  * atl1e_change_mtu - Change the Maximum Transfer Unit
 374  * @netdev: network interface device structure
 375  * @new_mtu: new value for maximum frame size
 376  *
 377  * Returns 0 on success, negative on failure
 378  */
 379 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 380 {
 381         struct atl1e_adapter *adapter = netdev_priv(netdev);
 382         int old_mtu   = netdev->mtu;
 383         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 384
 385         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 386                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 387                 netdev_warn(adapter->netdev, "invalid MTU setting\n");
 388                 return -EINVAL;
 389         }
 390         /* set MTU */
 391         if (old_mtu != new_mtu && netif_running(netdev)) {
 392                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 393                         msleep(1);
 394                 netdev->mtu = new_mtu;
 395                 adapter->hw.max_frame_size = new_mtu;
 396                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 397                 atl1e_down(adapter);
 398                 atl1e_up(adapter);
 399                 clear_bit(__AT_RESETTING, &adapter->flags);
 400         }
 401         return 0;
 402 }
 403
 404 /*
 405  *  caller should hold mdio_lock
 406  */
 407 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 408 {
 409         struct atl1e_adapter *adapter = netdev_priv(netdev);
 410         u16 result;
 411
 412         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 413         return result;
 414 }
 415
 416 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 417                              int reg_num, int val)
 418 {
 419         struct atl1e_adapter *adapter = netdev_priv(netdev);
 420
 421         atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 422 }
 423
 424 /*
 425  * atl1e_mii_ioctl -
 426  * @netdev:
 427  * @ifreq:
 428  * @cmd:
 429  */
 430 static int atl1e_mii_ioctl(struct net_device *netdev,
 431                            struct ifreq *ifr, int cmd)
 432 {
 433         struct atl1e_adapter *adapter = netdev_priv(netdev);
 434         struct mii_ioctl_data *data = if_mii(ifr);
 435         unsigned long flags;
 436         int retval = 0;
 437
 438         if (!netif_running(netdev))
 439                 return -EINVAL;
 440
 441         spin_lock_irqsave(&adapter->mdio_lock, flags);
 442         switch (cmd) {
 443         case SIOCGMIIPHY:
 444                 data->phy_id = 0;
 445                 break;
 446
 447         case SIOCGMIIREG:
 448                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 449                                     &data->val_out)) {
 450                         retval = -EIO;
 451                         goto out;
 452                 }
 453                 break;
 454
 455         case SIOCSMIIREG:
 456                 if (data->reg_num & ~(0x1F)) {
 457                         retval = -EFAULT;
 458                         goto out;
 459                 }
 460
 461                 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 462                            data->reg_num, data->val_in);
 463                 if (atl1e_write_phy_reg(&adapter->hw,
 464                                      data->reg_num, data->val_in)) {
 465                         retval = -EIO;
 466                         goto out;
 467                 }
 468                 break;
 469
 470         default:
 471                 retval = -EOPNOTSUPP;
 472                 break;
 473         }
 474 out:
 475         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 476         return retval;
 477
 478 }
 479
 480 /*
 481  * atl1e_ioctl -
 482  * @netdev:
 483  * @ifreq:
 484  * @cmd:
 485  */
 486 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 487 {
 488         switch (cmd) {
 489         case SIOCGMIIPHY:
 490         case SIOCGMIIREG:
 491         case SIOCSMIIREG:
 492                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 493         default:
 494                 return -EOPNOTSUPP;
 495         }
 496 }
 497
 498 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 499 {
 500         u16 cmd;
 501
 502         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 503         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 504         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 505         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 506
 507         /*
 508          * some motherboards BIOS(PXE/EFI) driver may set PME
 509          * while they transfer control to OS (Windows/Linux)
 510          * so we should clear this bit before NIC work normally
 511          */
 512         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 513         msleep(1);
 514 }
 515
 516 /*
 517  * atl1e_alloc_queues - Allocate memory for all rings
 518  * @adapter: board private structure to initialize
 519  *
 520  */
 521 static int __devinit atl1e_alloc_queues(struct atl1e_adapter *adapter)
 522 {
 523         return 0;
 524 }
 525
 526 /*
 527  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 528  * @adapter: board private structure to initialize
 529  *
 530  * atl1e_sw_init initializes the Adapter private data structure.
 531  * Fields are initialized based on PCI device information and
 532  * OS network device settings (MTU size).
 533  */
 534 static int __devinit atl1e_sw_init(struct atl1e_adapter *adapter)
 535 {
 536         struct atl1e_hw *hw   = &adapter->hw;
 537         struct pci_dev  *pdev = adapter->pdev;
 538         u32 phy_status_data = 0;
 539
 540         adapter->wol = 0;
 541         adapter->link_speed = SPEED_0;   /* hardware init */
 542         adapter->link_duplex = FULL_DUPLEX;
 543         adapter->num_rx_queues = 1;
 544
 545         /* PCI config space info */
 546         hw->vendor_id = pdev->vendor;
 547         hw->device_id = pdev->device;
 548         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 549         hw->subsystem_id = pdev->subsystem_device;
 550         hw->revision_id  = pdev->revision;
 551
 552         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 553
 554         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 555         /* nic type */
 556         if (hw->revision_id >= 0xF0) {
 557                 hw->nic_type = athr_l2e_revB;
 558         } else {
 559                 if (phy_status_data & PHY_STATUS_100M)
 560                         hw->nic_type = athr_l1e;
 561                 else
 562                         hw->nic_type = athr_l2e_revA;
 563         }
 564
 565         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 566
 567         if (phy_status_data & PHY_STATUS_EMI_CA)
 568                 hw->emi_ca = true;
 569         else
 570                 hw->emi_ca = false;
 571
 572         hw->phy_configured = false;
 573         hw->preamble_len = 7;
 574         hw->max_frame_size = adapter->netdev->mtu;
 575         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 576                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 577
 578         hw->rrs_type = atl1e_rrs_disable;
 579         hw->indirect_tab = 0;
 580         hw->base_cpu = 0;
 581
 582         /* need confirm */
 583
 584         hw->ict = 50000;                 /* 100ms */
 585         hw->smb_timer = 200000;          /* 200ms  */
 586         hw->tpd_burst = 5;
 587         hw->rrd_thresh = 1;
 588         hw->tpd_thresh = adapter->tx_ring.count / 2;
 589         hw->rx_count_down = 4;  /* 2us resolution */
 590         hw->tx_count_down = hw->imt * 4 / 3;
 591         hw->dmar_block = atl1e_dma_req_1024;
 592         hw->dmaw_block = atl1e_dma_req_1024;
 593         hw->dmar_dly_cnt = 15;
 594         hw->dmaw_dly_cnt = 4;
 595
 596         if (atl1e_alloc_queues(adapter)) {
 597                 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 598                 return -ENOMEM;
 599         }
 600
 601         atomic_set(&adapter->irq_sem, 1);
 602         spin_lock_init(&adapter->mdio_lock);
 603         spin_lock_init(&adapter->tx_lock);
 604
 605         set_bit(__AT_DOWN, &adapter->flags);
 606
 607         return 0;
 608 }
 609
 610 /*
 611  * atl1e_clean_tx_ring - Free Tx-skb
 612  * @adapter: board private structure
 613  */
 614 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 615 {
 616         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
 617                                 &adapter->tx_ring;
 618         struct atl1e_tx_buffer *tx_buffer = NULL;
 619         struct pci_dev *pdev = adapter->pdev;
 620         u16 index, ring_count;
 621
 622         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 623                 return;
 624
 625         ring_count = tx_ring->count;
 626         /* first unmmap dma */
 627         for (index = 0; index < ring_count; index++) {
 628                 tx_buffer = &tx_ring->tx_buffer[index];
 629                 if (tx_buffer->dma) {
 630                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 631                                 pci_unmap_single(pdev, tx_buffer->dma,
 632                                         tx_buffer->length, PCI_DMA_TODEVICE);
 633                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 634                                 pci_unmap_page(pdev, tx_buffer->dma,
 635                                         tx_buffer->length, PCI_DMA_TODEVICE);
 636                         tx_buffer->dma = 0;
 637                 }
 638         }
 639         /* second free skb */
 640         for (index = 0; index < ring_count; index++) {
 641                 tx_buffer = &tx_ring->tx_buffer[index];
 642                 if (tx_buffer->skb) {
 643                         dev_kfree_skb_any(tx_buffer->skb);
 644                         tx_buffer->skb = NULL;
 645                 }
 646         }
 647         /* Zero out Tx-buffers */
 648         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 649                                 ring_count);
 650         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 651                                 ring_count);
 652 }
 653
 654 /*
 655  * atl1e_clean_rx_ring - Free rx-reservation skbs
 656  * @adapter: board private structure
 657  */
 658 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 659 {
 660         struct atl1e_rx_ring *rx_ring =
 661                 (struct atl1e_rx_ring *)&adapter->rx_ring;
 662         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 663         u16 i, j;
 664
 665
 666         if (adapter->ring_vir_addr == NULL)
 667                 return;
 668         /* Zero out the descriptor ring */
 669         for (i = 0; i < adapter->num_rx_queues; i++) {
 670                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 671                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 672                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 673                                                 rx_ring->real_page_size);
 674                         }
 675                 }
 676         }
 677 }
 678
 679 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 680 {
 681         *ring_size = ((u32)(adapter->tx_ring.count *
 682                      sizeof(struct atl1e_tpd_desc) + 7
 683                         /* tx ring, qword align */
 684                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 685                         adapter->num_rx_queues + 31
 686                         /* rx ring,  32 bytes align */
 687                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 688                         sizeof(u32) + 3));
 689                         /* tx, rx cmd, dword align   */
 690 }
 691
 692 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 693 {
 694         struct atl1e_tx_ring *tx_ring = NULL;
 695         struct atl1e_rx_ring *rx_ring = NULL;
 696
 697         tx_ring = &adapter->tx_ring;
 698         rx_ring = &adapter->rx_ring;
 699
 700         rx_ring->real_page_size = adapter->rx_ring.page_size
 701                                  + adapter->hw.max_frame_size
 702                                  + ETH_HLEN + VLAN_HLEN
 703                                  + ETH_FCS_LEN;
 704         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 705         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 706
 707         adapter->ring_vir_addr = NULL;
 708         adapter->rx_ring.desc = NULL;
 709         rwlock_init(&adapter->tx_ring.tx_lock);
 710 }
 711
 712 /*
 713  * Read / Write Ptr Initialize:
 714  */
 715 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 716 {
 717         struct atl1e_tx_ring *tx_ring = NULL;
 718         struct atl1e_rx_ring *rx_ring = NULL;
 719         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 720         int i, j;
 721
 722         tx_ring = &adapter->tx_ring;
 723         rx_ring = &adapter->rx_ring;
 724         rx_page_desc = rx_ring->rx_page_desc;
 725
 726         tx_ring->next_to_use = 0;
 727         atomic_set(&tx_ring->next_to_clean, 0);
 728
 729         for (i = 0; i < adapter->num_rx_queues; i++) {
 730                 rx_page_desc[i].rx_using  = 0;
 731                 rx_page_desc[i].rx_nxseq = 0;
 732                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 733                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 734                         rx_page_desc[i].rx_page[j].read_offset = 0;
 735                 }
 736         }
 737 }
 738
 739 /*
 740  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 741  * @adapter: board private structure
 742  *
 743  * Free all transmit software resources
 744  */
 745 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 746 {
 747         struct pci_dev *pdev = adapter->pdev;
 748
 749         atl1e_clean_tx_ring(adapter);
 750         atl1e_clean_rx_ring(adapter);
 751
 752         if (adapter->ring_vir_addr) {
 753                 pci_free_consistent(pdev, adapter->ring_size,
 754                                 adapter->ring_vir_addr, adapter->ring_dma);
 755                 adapter->ring_vir_addr = NULL;
 756         }
 757
 758         if (adapter->tx_ring.tx_buffer) {
 759                 kfree(adapter->tx_ring.tx_buffer);
 760                 adapter->tx_ring.tx_buffer = NULL;
 761         }
 762 }
 763
 764 /*
 765  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 766  * @adapter: board private structure
 767  *
 768  * Return 0 on success, negative on failure
 769  */
 770 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 771 {
 772         struct pci_dev *pdev = adapter->pdev;
 773         struct atl1e_tx_ring *tx_ring;
 774         struct atl1e_rx_ring *rx_ring;
 775         struct atl1e_rx_page_desc  *rx_page_desc;
 776         int size, i, j;
 777         u32 offset = 0;
 778         int err = 0;
 779
 780         if (adapter->ring_vir_addr != NULL)
 781                 return 0; /* alloced already */
 782
 783         tx_ring = &adapter->tx_ring;
 784         rx_ring = &adapter->rx_ring;
 785
 786         /* real ring DMA buffer */
 787
 788         size = adapter->ring_size;
 789         adapter->ring_vir_addr = pci_alloc_consistent(pdev,
 790                         adapter->ring_size, &adapter->ring_dma);
 791
 792         if (adapter->ring_vir_addr == NULL) {
 793                 netdev_err(adapter->netdev,
 794                            "pci_alloc_consistent failed, size = D%d\n", size);
 795                 return -ENOMEM;
 796         }
 797
 798         memset(adapter->ring_vir_addr, 0, adapter->ring_size);
 799
 800         rx_page_desc = rx_ring->rx_page_desc;
 801
 802         /* Init TPD Ring */
 803         tx_ring->dma = roundup(adapter->ring_dma, 8);
 804         offset = tx_ring->dma - adapter->ring_dma;
 805         tx_ring->desc = (struct atl1e_tpd_desc *)
 806                         (adapter->ring_vir_addr + offset);
 807         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 808         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 809         if (tx_ring->tx_buffer == NULL) {
 810                 netdev_err(adapter->netdev, "kzalloc failed, size = D%d\n",
 811                            size);
 812                 err = -ENOMEM;
 813                 goto failed;
 814         }
 815
 816         /* Init RXF-Pages */
 817         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 818         offset = roundup(offset, 32);
 819
 820         for (i = 0; i < adapter->num_rx_queues; i++) {
 821                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 822                         rx_page_desc[i].rx_page[j].dma =
 823                                 adapter->ring_dma + offset;
 824                         rx_page_desc[i].rx_page[j].addr =
 825                                 adapter->ring_vir_addr + offset;
 826                         offset += rx_ring->real_page_size;
 827                 }
 828         }
 829
 830         /* Init CMB dma address */
 831         tx_ring->cmb_dma = adapter->ring_dma + offset;
 832         tx_ring->cmb     = (u32 *)(adapter->ring_vir_addr + offset);
 833         offset += sizeof(u32);
 834
 835         for (i = 0; i < adapter->num_rx_queues; i++) {
 836                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 837                         rx_page_desc[i].rx_page[j].write_offset_dma =
 838                                 adapter->ring_dma + offset;
 839                         rx_page_desc[i].rx_page[j].write_offset_addr =
 840                                 adapter->ring_vir_addr + offset;
 841                         offset += sizeof(u32);
 842                 }
 843         }
 844
 845         if (unlikely(offset > adapter->ring_size)) {
 846                 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 847                            offset, adapter->ring_size);
 848                 err = -1;
 849                 goto failed;
 850         }
 851
 852         return 0;
 853 failed:
 854         if (adapter->ring_vir_addr != NULL) {
 855                 pci_free_consistent(pdev, adapter->ring_size,
 856                                 adapter->ring_vir_addr, adapter->ring_dma);
 857                 adapter->ring_vir_addr = NULL;
 858         }
 859         return err;
 860 }
 861
 862 static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter)
 863 {
 864
 865         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 866         struct atl1e_rx_ring *rx_ring =
 867                         (struct atl1e_rx_ring *)&adapter->rx_ring;
 868         struct atl1e_tx_ring *tx_ring =
 869                         (struct atl1e_tx_ring *)&adapter->tx_ring;
 870         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 871         int i, j;
 872
 873         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 874                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 875         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 876                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 877         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 878         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 879                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 880
 881         rx_page_desc = rx_ring->rx_page_desc;
 882         /* RXF Page Physical address / Page Length */
 883         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 884                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 885                                  (u32)((adapter->ring_dma &
 886                                  AT_DMA_HI_ADDR_MASK) >> 32));
 887                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 888                         u32 page_phy_addr;
 889                         u32 offset_phy_addr;
 890
 891                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 892                         offset_phy_addr =
 893                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 894
 895                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 896                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 897                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 898                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 899                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 900                 }
 901         }
 902         /* Page Length */
 903         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 904         /* Load all of base address above */
 905         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 906 }
 907
 908 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 909 {
 910         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 911         u32 dev_ctrl_data = 0;
 912         u32 max_pay_load = 0;
 913         u32 jumbo_thresh = 0;
 914         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 915
 916         /* configure TXQ param */
 917         if (hw->nic_type != athr_l2e_revB) {
 918                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 919                 if (hw->max_frame_size <= 1500) {
 920                         jumbo_thresh = hw->max_frame_size + extra_size;
 921                 } else if (hw->max_frame_size < 6*1024) {
 922                         jumbo_thresh =
 923                                 (hw->max_frame_size + extra_size) * 2 / 3;
 924                 } else {
 925                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 926                 }
 927                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 928         }
 929
 930         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 931
 932         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 933                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 934
 935         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 936
 937         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 938                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 939         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 940
 941         if (hw->nic_type != athr_l2e_revB)
 942                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 943                               atl1e_pay_load_size[hw->dmar_block]);
 944         /* enable TXQ */
 945         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 946                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 947                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 948                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 949 }
 950
 951 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 952 {
 953         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 954         u32 rxf_len  = 0;
 955         u32 rxf_low  = 0;
 956         u32 rxf_high = 0;
 957         u32 rxf_thresh_data = 0;
 958         u32 rxq_ctrl_data = 0;
 959
 960         if (hw->nic_type != athr_l2e_revB) {
 961                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 962                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 963                               RXQ_JMBOSZ_TH_SHIFT |
 964                               (1 & RXQ_JMBO_LKAH_MASK) <<
 965                               RXQ_JMBO_LKAH_SHIFT));
 966
 967                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 968                 rxf_high = rxf_len * 4 / 5;
 969                 rxf_low  = rxf_len / 5;
 970                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 971                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 972                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 973                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 974
 975                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 976         }
 977
 978         /* RRS */
 979         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
 980         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
 981
 982         if (hw->rrs_type & atl1e_rrs_ipv4)
 983                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
 984
 985         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
 986                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
 987
 988         if (hw->rrs_type & atl1e_rrs_ipv6)
 989                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
 990
 991         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
 992                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
 993
 994         if (hw->rrs_type != atl1e_rrs_disable)
 995                 rxq_ctrl_data |=
 996                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
 997
 998         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
 999                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1000
1001         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1002 }
1003
1004 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1005 {
1006         struct atl1e_hw *hw = &adapter->hw;
1007         u32 dma_ctrl_data = 0;
1008
1009         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1010         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1011                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1012         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1013                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1014         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1015         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1016                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1017         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1018                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1019
1020         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1021 }
1022
1023 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1024 {
1025         u32 value;
1026         struct atl1e_hw *hw = &adapter->hw;
1027         struct net_device *netdev = adapter->netdev;
1028
1029         /* Config MAC CTRL Register */
1030         value = MAC_CTRL_TX_EN |
1031                 MAC_CTRL_RX_EN ;
1032
1033         if (FULL_DUPLEX == adapter->link_duplex)
1034                 value |= MAC_CTRL_DUPLX;
1035
1036         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1037                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1038                           MAC_CTRL_SPEED_SHIFT);
1039         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1040
1041         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1042         value |= (((u32)adapter->hw.preamble_len &
1043                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1044
1045         if (adapter->vlgrp)
1046                 value |= MAC_CTRL_RMV_VLAN;
1047
1048         value |= MAC_CTRL_BC_EN;
1049         if (netdev->flags & IFF_PROMISC)
1050                 value |= MAC_CTRL_PROMIS_EN;
1051         if (netdev->flags & IFF_ALLMULTI)
1052                 value |= MAC_CTRL_MC_ALL_EN;
1053
1054         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1055 }
1056
1057 /*
1058  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1059  * @adapter: board private structure
1060  *
1061  * Configure the Tx /Rx unit of the MAC after a reset.
1062  */
1063 static int atl1e_configure(struct atl1e_adapter *adapter)
1064 {
1065         struct atl1e_hw *hw = &adapter->hw;
1066
1067         u32 intr_status_data = 0;
1068
1069         /* clear interrupt status */
1070         AT_WRITE_REG(hw, REG_ISR, ~0);
1071
1072         /* 1. set MAC Address */
1073         atl1e_hw_set_mac_addr(hw);
1074
1075         /* 2. Init the Multicast HASH table done by set_muti */
1076
1077         /* 3. Clear any WOL status */
1078         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1079
1080         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1081          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1082          *    High 32bits memory */
1083         atl1e_configure_des_ring(adapter);
1084
1085         /* 5. set Interrupt Moderator Timer */
1086         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1087         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1088         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1089                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1090
1091         /* 6. rx/tx threshold to trig interrupt */
1092         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1093         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1094         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1095         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1096
1097         /* 7. set Interrupt Clear Timer */
1098         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1099
1100         /* 8. set MTU */
1101         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1102                         VLAN_HLEN + ETH_FCS_LEN);
1103
1104         /* 9. config TXQ early tx threshold */
1105         atl1e_configure_tx(adapter);
1106
1107         /* 10. config RXQ */
1108         atl1e_configure_rx(adapter);
1109
1110         /* 11. config  DMA Engine */
1111         atl1e_configure_dma(adapter);
1112
1113         /* 12. smb timer to trig interrupt */
1114         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1115
1116         intr_status_data = AT_READ_REG(hw, REG_ISR);
1117         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1118                 netdev_err(adapter->netdev,
1119                            "atl1e_configure failed, PCIE phy link down\n");
1120                 return -1;
1121         }
1122
1123         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1124         return 0;
1125 }
1126
1127 /*
1128  * atl1e_get_stats - Get System Network Statistics
1129  * @netdev: network interface device structure
1130  *
1131  * Returns the address of the device statistics structure.
1132  * The statistics are actually updated from the timer callback.
1133  */
1134 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1135 {
1136         struct atl1e_adapter *adapter = netdev_priv(netdev);
1137         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1138         struct net_device_stats *net_stats = &netdev->stats;
1139
1140         net_stats->rx_packets = hw_stats->rx_ok;
1141         net_stats->tx_packets = hw_stats->tx_ok;
1142         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1143         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1144         net_stats->multicast  = hw_stats->rx_mcast;
1145         net_stats->collisions = hw_stats->tx_1_col +
1146                                 hw_stats->tx_2_col * 2 +
1147                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1148
1149         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1150                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1151                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1152         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1153         net_stats->rx_length_errors = hw_stats->rx_len_err;
1154         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1155         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1156         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1157
1158         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1159
1160         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1161                                hw_stats->tx_underrun + hw_stats->tx_trunc;
1162         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1163         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1164         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1165
1166         return net_stats;
1167 }
1168
1169 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1170 {
1171         u16 hw_reg_addr = 0;
1172         unsigned long *stats_item = NULL;
1173
1174         /* update rx status */
1175         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1176         stats_item  = &adapter->hw_stats.rx_ok;
1177         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1178                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1179                 stats_item++;
1180                 hw_reg_addr += 4;
1181         }
1182         /* update tx status */
1183         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1184         stats_item  = &adapter->hw_stats.tx_ok;
1185         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1186                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1187                 stats_item++;
1188                 hw_reg_addr += 4;
1189         }
1190 }
1191
1192 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1193 {
1194         u16 phy_data;
1195
1196         spin_lock(&adapter->mdio_lock);
1197         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1198         spin_unlock(&adapter->mdio_lock);
1199 }
1200
1201 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1202 {
1203         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
1204                                         &adapter->tx_ring;
1205         struct atl1e_tx_buffer *tx_buffer = NULL;
1206         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1207         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1208
1209         while (next_to_clean != hw_next_to_clean) {
1210                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1211                 if (tx_buffer->dma) {
1212                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1213                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1214                                         tx_buffer->length, PCI_DMA_TODEVICE);
1215                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1216                                 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1217                                         tx_buffer->length, PCI_DMA_TODEVICE);
1218                         tx_buffer->dma = 0;
1219                 }
1220
1221                 if (tx_buffer->skb) {
1222                         dev_kfree_skb_irq(tx_buffer->skb);
1223                         tx_buffer->skb = NULL;
1224                 }
1225
1226                 if (++next_to_clean == tx_ring->count)
1227                         next_to_clean = 0;
1228         }
1229
1230         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1231
1232         if (netif_queue_stopped(adapter->netdev) &&
1233                         netif_carrier_ok(adapter->netdev)) {
1234                 netif_wake_queue(adapter->netdev);
1235         }
1236
1237         return true;
1238 }
1239
1240 /*
1241  * atl1e_intr - Interrupt Handler
1242  * @irq: interrupt number
1243  * @data: pointer to a network interface device structure
1244  * @pt_regs: CPU registers structure
1245  */
1246 static irqreturn_t atl1e_intr(int irq, void *data)
1247 {
1248         struct net_device *netdev  = data;
1249         struct atl1e_adapter *adapter = netdev_priv(netdev);
1250         struct atl1e_hw *hw = &adapter->hw;
1251         int max_ints = AT_MAX_INT_WORK;
1252         int handled = IRQ_NONE;
1253         u32 status;
1254
1255         do {
1256                 status = AT_READ_REG(hw, REG_ISR);
1257                 if ((status & IMR_NORMAL_MASK) == 0 ||
1258                                 (status & ISR_DIS_INT) != 0) {
1259                         if (max_ints != AT_MAX_INT_WORK)
1260                                 handled = IRQ_HANDLED;
1261                         break;
1262                 }
1263                 /* link event */
1264                 if (status & ISR_GPHY)
1265                         atl1e_clear_phy_int(adapter);
1266                 /* Ack ISR */
1267                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1268
1269                 handled = IRQ_HANDLED;
1270                 /* check if PCIE PHY Link down */
1271                 if (status & ISR_PHY_LINKDOWN) {
1272                         netdev_err(adapter->netdev,
1273                                    "pcie phy linkdown %x\n", status);
1274                         if (netif_running(adapter->netdev)) {
1275                                 /* reset MAC */
1276                                 atl1e_irq_reset(adapter);
1277                                 schedule_work(&adapter->reset_task);
1278                                 break;
1279                         }
1280                 }
1281
1282                 /* check if DMA read/write error */
1283                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1284                         netdev_err(adapter->netdev,
1285                                    "PCIE DMA RW error (status = 0x%x)\n",
1286                                    status);
1287                         atl1e_irq_reset(adapter);
1288                         schedule_work(&adapter->reset_task);
1289                         break;
1290                 }
1291
1292                 if (status & ISR_SMB)
1293                         atl1e_update_hw_stats(adapter);
1294
1295                 /* link event */
1296                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1297                         netdev->stats.tx_carrier_errors++;
1298                         atl1e_link_chg_event(adapter);
1299                         break;
1300                 }
1301
1302                 /* transmit event */
1303                 if (status & ISR_TX_EVENT)
1304                         atl1e_clean_tx_irq(adapter);
1305
1306                 if (status & ISR_RX_EVENT) {
1307                         /*
1308                          * disable rx interrupts, without
1309                          * the synchronize_irq bit
1310                          */
1311                         AT_WRITE_REG(hw, REG_IMR,
1312                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1313                         AT_WRITE_FLUSH(hw);
1314                         if (likely(napi_schedule_prep(
1315                                    &adapter->napi)))
1316                                 __napi_schedule(&adapter->napi);
1317                 }
1318         } while (--max_ints > 0);
1319         /* re-enable Interrupt*/
1320         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1321
1322         return handled;
1323 }
1324
1325 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1326                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1327 {
1328         u8 *packet = (u8 *)(prrs + 1);
1329         struct iphdr *iph;
1330         u16 head_len = ETH_HLEN;
1331         u16 pkt_flags;
1332         u16 err_flags;
1333
1334         skb_checksum_none_assert(skb);
1335         pkt_flags = prrs->pkt_flag;
1336         err_flags = prrs->err_flag;
1337         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1338                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1339                 if (pkt_flags & RRS_IS_IPV4) {
1340                         if (pkt_flags & RRS_IS_802_3)
1341                                 head_len += 8;
1342                         iph = (struct iphdr *) (packet + head_len);
1343                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1344                                 goto hw_xsum;
1345                 }
1346                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1347                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1348                         return;
1349                 }
1350         }
1351
1352 hw_xsum :
1353         return;
1354 }
1355
1356 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1357                                                u8 que)
1358 {
1359         struct atl1e_rx_page_desc *rx_page_desc =
1360                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1361         u8 rx_using = rx_page_desc[que].rx_using;
1362
1363         return (struct atl1e_rx_page *)&(rx_page_desc[que].rx_page[rx_using]);
1364 }
1365
1366 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1367                    int *work_done, int work_to_do)
1368 {
1369         struct net_device *netdev  = adapter->netdev;
1370         struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *)
1371                                          &adapter->rx_ring;
1372         struct atl1e_rx_page_desc *rx_page_desc =
1373                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1374         struct sk_buff *skb = NULL;
1375         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1376         u32 packet_size, write_offset;
1377         struct atl1e_recv_ret_status *prrs;
1378
1379         write_offset = *(rx_page->write_offset_addr);
1380         if (likely(rx_page->read_offset < write_offset)) {
1381                 do {
1382                         if (*work_done >= work_to_do)
1383                                 break;
1384                         (*work_done)++;
1385                         /* get new packet's  rrs */
1386                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1387                                                  rx_page->read_offset);
1388                         /* check sequence number */
1389                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1390                                 netdev_err(netdev,
1391                                            "rx sequence number error (rx=%d) (expect=%d)\n",
1392                                            prrs->seq_num,
1393                                            rx_page_desc[que].rx_nxseq);
1394                                 rx_page_desc[que].rx_nxseq++;
1395                                 /* just for debug use */
1396                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1397                                              (((u32)prrs->seq_num) << 16) |
1398                                              rx_page_desc[que].rx_nxseq);
1399                                 goto fatal_err;
1400                         }
1401                         rx_page_desc[que].rx_nxseq++;
1402
1403                         /* error packet */
1404                         if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
1405                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1406                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1407                                         RRS_ERR_TRUNC)) {
1408                                 /* hardware error, discard this packet*/
1409                                         netdev_err(netdev,
1410                                                    "rx packet desc error %x\n",
1411                                                    *((u32 *)prrs + 1));
1412                                         goto skip_pkt;
1413                                 }
1414                         }
1415
1416                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1417                                         RRS_PKT_SIZE_MASK) - 4; /* CRC */
1418                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1419                         if (skb == NULL) {
1420                                 netdev_warn(netdev,
1421                                             "Memory squeeze, deferring packet\n");
1422                                 goto skip_pkt;
1423                         }
1424                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1425                         skb_put(skb, packet_size);
1426                         skb->protocol = eth_type_trans(skb, netdev);
1427                         atl1e_rx_checksum(adapter, skb, prrs);
1428
1429                         if (unlikely(adapter->vlgrp &&
1430                                 (prrs->pkt_flag & RRS_IS_VLAN_TAG))) {
1431                                 u16 vlan_tag = (prrs->vtag >> 4) |
1432                                                ((prrs->vtag & 7) << 13) |
1433                                                ((prrs->vtag & 8) << 9);
1434                                 netdev_dbg(netdev,
1435                                            "RXD VLAN TAG<RRD>=0x%04x\n",
1436                                            prrs->vtag);
1437                                 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
1438                                                          vlan_tag);
1439                         } else {
1440                                 netif_receive_skb(skb);
1441                         }
1442
1443 skip_pkt:
1444         /* skip current packet whether it's ok or not. */
1445                         rx_page->read_offset +=
1446                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1447                                 RRS_PKT_SIZE_MASK) +
1448                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1449                                                 0xFFFFFFE0);
1450
1451                         if (rx_page->read_offset >= rx_ring->page_size) {
1452                                 /* mark this page clean */
1453                                 u16 reg_addr;
1454                                 u8  rx_using;
1455
1456                                 rx_page->read_offset =
1457                                         *(rx_page->write_offset_addr) = 0;
1458                                 rx_using = rx_page_desc[que].rx_using;
1459                                 reg_addr =
1460                                         atl1e_rx_page_vld_regs[que][rx_using];
1461                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1462                                 rx_page_desc[que].rx_using ^= 1;
1463                                 rx_page = atl1e_get_rx_page(adapter, que);
1464                         }
1465                         write_offset = *(rx_page->write_offset_addr);
1466                 } while (rx_page->read_offset < write_offset);
1467         }
1468
1469         return;
1470
1471 fatal_err:
1472         if (!test_bit(__AT_DOWN, &adapter->flags))
1473                 schedule_work(&adapter->reset_task);
1474 }
1475
1476 /*
1477  * atl1e_clean - NAPI Rx polling callback
1478  * @adapter: board private structure
1479  */
1480 static int atl1e_clean(struct napi_struct *napi, int budget)
1481 {
1482         struct atl1e_adapter *adapter =
1483                         container_of(napi, struct atl1e_adapter, napi);
1484         u32 imr_data;
1485         int work_done = 0;
1486
1487         /* Keep link state information with original netdev */
1488         if (!netif_carrier_ok(adapter->netdev))
1489                 goto quit_polling;
1490
1491         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1492
1493         /* If no Tx and not enough Rx work done, exit the polling mode */
1494         if (work_done < budget) {
1495 quit_polling:
1496                 napi_complete(napi);
1497                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1498                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1499                 /* test debug */
1500                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1501                         atomic_dec(&adapter->irq_sem);
1502                         netdev_err(adapter->netdev,
1503                                    "atl1e_clean is called when AT_DOWN\n");
1504                 }
1505                 /* reenable RX intr */
1506                 /*atl1e_irq_enable(adapter); */
1507
1508         }
1509         return work_done;
1510 }
1511
1512 #ifdef CONFIG_NET_POLL_CONTROLLER
1513
1514 /*
1515  * Polling 'interrupt' - used by things like netconsole to send skbs
1516  * without having to re-enable interrupts. It's not called while
1517  * the interrupt routine is executing.
1518  */
1519 static void atl1e_netpoll(struct net_device *netdev)
1520 {
1521         struct atl1e_adapter *adapter = netdev_priv(netdev);
1522
1523         disable_irq(adapter->pdev->irq);
1524         atl1e_intr(adapter->pdev->irq, netdev);
1525         enable_irq(adapter->pdev->irq);
1526 }
1527 #endif
1528
1529 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1530 {
1531         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1532         u16 next_to_use = 0;
1533         u16 next_to_clean = 0;
1534
1535         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1536         next_to_use   = tx_ring->next_to_use;
1537
1538         return (u16)(next_to_clean > next_to_use) ?
1539                 (next_to_clean - next_to_use - 1) :
1540                 (tx_ring->count + next_to_clean - next_to_use - 1);
1541 }
1542
1543 /*
1544  * get next usable tpd
1545  * Note: should call atl1e_tdp_avail to make sure
1546  * there is enough tpd to use
1547  */
1548 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1549 {
1550         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1551         u16 next_to_use = 0;
1552
1553         next_to_use = tx_ring->next_to_use;
1554         if (++tx_ring->next_to_use == tx_ring->count)
1555                 tx_ring->next_to_use = 0;
1556
1557         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1558         return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use];
1559 }
1560
1561 static struct atl1e_tx_buffer *
1562 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1563 {
1564         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1565
1566         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1567 }
1568
1569 /* Calculate the transmit packet descript needed*/
1570 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1571 {
1572         int i = 0;
1573         u16 tpd_req = 1;
1574         u16 fg_size = 0;
1575         u16 proto_hdr_len = 0;
1576
1577         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1578                 fg_size = skb_shinfo(skb)->frags[i].size;
1579                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1580         }
1581
1582         if (skb_is_gso(skb)) {
1583                 if (skb->protocol == htons(ETH_P_IP) ||
1584                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1585                         proto_hdr_len = skb_transport_offset(skb) +
1586                                         tcp_hdrlen(skb);
1587                         if (proto_hdr_len < skb_headlen(skb)) {
1588                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1589                                            MAX_TX_BUF_LEN - 1) >>
1590                                            MAX_TX_BUF_SHIFT);
1591                         }
1592                 }
1593
1594         }
1595         return tpd_req;
1596 }
1597
1598 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1599                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1600 {
1601         u8 hdr_len;
1602         u32 real_len;
1603         unsigned short offload_type;
1604         int err;
1605
1606         if (skb_is_gso(skb)) {
1607                 if (skb_header_cloned(skb)) {
1608                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1609                         if (unlikely(err))
1610                                 return -1;
1611                 }
1612                 offload_type = skb_shinfo(skb)->gso_type;
1613
1614                 if (offload_type & SKB_GSO_TCPV4) {
1615                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1616                                         + ntohs(ip_hdr(skb)->tot_len));
1617
1618                         if (real_len < skb->len)
1619                                 pskb_trim(skb, real_len);
1620
1621                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1622                         if (unlikely(skb->len == hdr_len)) {
1623                                 /* only xsum need */
1624                                 netdev_warn(adapter->netdev,
1625                                             "IPV4 tso with zero data??\n");
1626                                 goto check_sum;
1627                         } else {
1628                                 ip_hdr(skb)->check = 0;
1629                                 ip_hdr(skb)->tot_len = 0;
1630                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1631                                                         ip_hdr(skb)->saddr,
1632                                                         ip_hdr(skb)->daddr,
1633                                                         0, IPPROTO_TCP, 0);
1634                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1635                                         TDP_V4_IPHL_MASK) <<
1636                                         TPD_V4_IPHL_SHIFT;
1637                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1638                                         TPD_TCPHDRLEN_MASK) <<
1639                                         TPD_TCPHDRLEN_SHIFT;
1640                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1641                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1642                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1643                         }
1644                         return 0;
1645                 }
1646         }
1647
1648 check_sum:
1649         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1650                 u8 css, cso;
1651
1652                 cso = skb_checksum_start_offset(skb);
1653                 if (unlikely(cso & 0x1)) {
1654                         netdev_err(adapter->netdev,
1655                                    "payload offset should not ant event number\n");
1656                         return -1;
1657                 } else {
1658                         css = cso + skb->csum_offset;
1659                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1660                                         TPD_PLOADOFFSET_SHIFT;
1661                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1662                                         TPD_CCSUMOFFSET_SHIFT;
1663                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1664                 }
1665         }
1666
1667         return 0;
1668 }
1669
1670 static void atl1e_tx_map(struct atl1e_adapter *adapter,
1671                       struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1672 {
1673         struct atl1e_tpd_desc *use_tpd = NULL;
1674         struct atl1e_tx_buffer *tx_buffer = NULL;
1675         u16 buf_len = skb_headlen(skb);
1676         u16 map_len = 0;
1677         u16 mapped_len = 0;
1678         u16 hdr_len = 0;
1679         u16 nr_frags;
1680         u16 f;
1681         int segment;
1682
1683         nr_frags = skb_shinfo(skb)->nr_frags;
1684         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1685         if (segment) {
1686                 /* TSO */
1687                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1688                 use_tpd = tpd;
1689
1690                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1691                 tx_buffer->length = map_len;
1692                 tx_buffer->dma = pci_map_single(adapter->pdev,
1693                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1694                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1695                 mapped_len += map_len;
1696                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1697                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1698                         ((cpu_to_le32(tx_buffer->length) &
1699                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1700         }
1701
1702         while (mapped_len < buf_len) {
1703                 /* mapped_len == 0, means we should use the first tpd,
1704                    which is given by caller  */
1705                 if (mapped_len == 0) {
1706                         use_tpd = tpd;
1707                 } else {
1708                         use_tpd = atl1e_get_tpd(adapter);
1709                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1710                 }
1711                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1712                 tx_buffer->skb = NULL;
1713
1714                 tx_buffer->length = map_len =
1715                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1716                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1717                 tx_buffer->dma =
1718                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1719                                         map_len, PCI_DMA_TODEVICE);
1720                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1721                 mapped_len  += map_len;
1722                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1723                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1724                         ((cpu_to_le32(tx_buffer->length) &
1725                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1726         }
1727
1728         for (f = 0; f < nr_frags; f++) {
1729                 struct skb_frag_struct *frag;
1730                 u16 i;
1731                 u16 seg_num;
1732
1733                 frag = &skb_shinfo(skb)->frags[f];
1734                 buf_len = frag->size;
1735
1736                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1737                 for (i = 0; i < seg_num; i++) {
1738                         use_tpd = atl1e_get_tpd(adapter);
1739                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1740
1741                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1742                         BUG_ON(tx_buffer->skb);
1743
1744                         tx_buffer->skb = NULL;
1745                         tx_buffer->length =
1746                                 (buf_len > MAX_TX_BUF_LEN) ?
1747                                 MAX_TX_BUF_LEN : buf_len;
1748                         buf_len -= tx_buffer->length;
1749
1750                         tx_buffer->dma =
1751                                 pci_map_page(adapter->pdev, frag->page,
1752                                                 frag->page_offset +
1753                                                 (i * MAX_TX_BUF_LEN),
1754                                                 tx_buffer->length,
1755                                                 PCI_DMA_TODEVICE);
1756                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1757                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1758                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1759                                         ((cpu_to_le32(tx_buffer->length) &
1760                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1761                 }
1762         }
1763
1764         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1765                 /* note this one is a tcp header */
1766                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1767         /* The last tpd */
1768
1769         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1770         /* The last buffer info contain the skb address,
1771            so it will be free after unmap */
1772         tx_buffer->skb = skb;
1773 }
1774
1775 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1776                            struct atl1e_tpd_desc *tpd)
1777 {
1778         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1779         /* Force memory writes to complete before letting h/w
1780          * know there are new descriptors to fetch.  (Only
1781          * applicable for weak-ordered memory model archs,
1782          * such as IA-64). */
1783         wmb();
1784         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1785 }
1786
1787 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1788                                           struct net_device *netdev)
1789 {
1790         struct atl1e_adapter *adapter = netdev_priv(netdev);
1791         unsigned long flags;
1792         u16 tpd_req = 1;
1793         struct atl1e_tpd_desc *tpd;
1794
1795         if (test_bit(__AT_DOWN, &adapter->flags)) {
1796                 dev_kfree_skb_any(skb);
1797                 return NETDEV_TX_OK;
1798         }
1799
1800         if (unlikely(skb->len <= 0)) {
1801                 dev_kfree_skb_any(skb);
1802                 return NETDEV_TX_OK;
1803         }
1804         tpd_req = atl1e_cal_tdp_req(skb);
1805         if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1806                 return NETDEV_TX_LOCKED;
1807
1808         if (atl1e_tpd_avail(adapter) < tpd_req) {
1809                 /* no enough descriptor, just stop queue */
1810                 netif_stop_queue(netdev);
1811                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1812                 return NETDEV_TX_BUSY;
1813         }
1814
1815         tpd = atl1e_get_tpd(adapter);
1816
1817         if (unlikely(vlan_tx_tag_present(skb))) {
1818                 u16 vlan_tag = vlan_tx_tag_get(skb);
1819                 u16 atl1e_vlan_tag;
1820
1821                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1822                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1823                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1824                                 TPD_VLAN_SHIFT;
1825         }
1826
1827         if (skb->protocol == htons(ETH_P_8021Q))
1828                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1829
1830         if (skb_network_offset(skb) != ETH_HLEN)
1831                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1832
1833         /* do TSO and check sum */
1834         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1835                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1836                 dev_kfree_skb_any(skb);
1837                 return NETDEV_TX_OK;
1838         }
1839
1840         atl1e_tx_map(adapter, skb, tpd);
1841         atl1e_tx_queue(adapter, tpd_req, tpd);
1842
1843         netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1844         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1845         return NETDEV_TX_OK;
1846 }
1847
1848 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1849 {
1850         struct net_device *netdev = adapter->netdev;
1851
1852         free_irq(adapter->pdev->irq, netdev);
1853
1854         if (adapter->have_msi)
1855                 pci_disable_msi(adapter->pdev);
1856 }
1857
1858 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1859 {
1860         struct pci_dev    *pdev   = adapter->pdev;
1861         struct net_device *netdev = adapter->netdev;
1862         int flags = 0;
1863         int err = 0;
1864
1865         adapter->have_msi = true;
1866         err = pci_enable_msi(adapter->pdev);
1867         if (err) {
1868                 netdev_dbg(adapter->netdev,
1869                            "Unable to allocate MSI interrupt Error: %d\n", err);
1870                 adapter->have_msi = false;
1871         } else
1872                 netdev->irq = pdev->irq;
1873
1874
1875         if (!adapter->have_msi)
1876                 flags |= IRQF_SHARED;
1877         err = request_irq(adapter->pdev->irq, atl1e_intr, flags,
1878                         netdev->name, netdev);
1879         if (err) {
1880                 netdev_dbg(adapter->netdev,
1881                            "Unable to allocate interrupt Error: %d\n", err);
1882                 if (adapter->have_msi)
1883                         pci_disable_msi(adapter->pdev);
1884                 return err;
1885         }
1886         netdev_dbg(adapter->netdev, "atl1e_request_irq OK\n");
1887         return err;
1888 }
1889
1890 int atl1e_up(struct atl1e_adapter *adapter)
1891 {
1892         struct net_device *netdev = adapter->netdev;
1893         int err = 0;
1894         u32 val;
1895
1896         /* hardware has been reset, we need to reload some things */
1897         err = atl1e_init_hw(&adapter->hw);
1898         if (err) {
1899                 err = -EIO;
1900                 return err;
1901         }
1902         atl1e_init_ring_ptrs(adapter);
1903         atl1e_set_multi(netdev);
1904         atl1e_restore_vlan(adapter);
1905
1906         if (atl1e_configure(adapter)) {
1907                 err = -EIO;
1908                 goto err_up;
1909         }
1910
1911         clear_bit(__AT_DOWN, &adapter->flags);
1912         napi_enable(&adapter->napi);
1913         atl1e_irq_enable(adapter);
1914         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1915         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1916                       val | MASTER_CTRL_MANUAL_INT);
1917
1918 err_up:
1919         return err;
1920 }
1921
1922 void atl1e_down(struct atl1e_adapter *adapter)
1923 {
1924         struct net_device *netdev = adapter->netdev;
1925
1926         /* signal that we're down so the interrupt handler does not
1927          * reschedule our watchdog timer */
1928         set_bit(__AT_DOWN, &adapter->flags);
1929
1930 #ifdef NETIF_F_LLTX
1931         netif_stop_queue(netdev);
1932 #else
1933         netif_tx_disable(netdev);
1934 #endif
1935
1936         /* reset MAC to disable all RX/TX */
1937         atl1e_reset_hw(&adapter->hw);
1938         msleep(1);
1939
1940         napi_disable(&adapter->napi);
1941         atl1e_del_timer(adapter);
1942         atl1e_irq_disable(adapter);
1943
1944         netif_carrier_off(netdev);
1945         adapter->link_speed = SPEED_0;
1946         adapter->link_duplex = -1;
1947         atl1e_clean_tx_ring(adapter);
1948         atl1e_clean_rx_ring(adapter);
1949 }
1950
1951 /*
1952  * atl1e_open - Called when a network interface is made active
1953  * @netdev: network interface device structure
1954  *
1955  * Returns 0 on success, negative value on failure
1956  *
1957  * The open entry point is called when a network interface is made
1958  * active by the system (IFF_UP).  At this point all resources needed
1959  * for transmit and receive operations are allocated, the interrupt
1960  * handler is registered with the OS, the watchdog timer is started,
1961  * and the stack is notified that the interface is ready.
1962  */
1963 static int atl1e_open(struct net_device *netdev)
1964 {
1965         struct atl1e_adapter *adapter = netdev_priv(netdev);
1966         int err;
1967
1968         /* disallow open during test */
1969         if (test_bit(__AT_TESTING, &adapter->flags))
1970                 return -EBUSY;
1971
1972         /* allocate rx/tx dma buffer & descriptors */
1973         atl1e_init_ring_resources(adapter);
1974         err = atl1e_setup_ring_resources(adapter);
1975         if (unlikely(err))
1976                 return err;
1977
1978         err = atl1e_request_irq(adapter);
1979         if (unlikely(err))
1980                 goto err_req_irq;
1981
1982         err = atl1e_up(adapter);
1983         if (unlikely(err))
1984                 goto err_up;
1985
1986         return 0;
1987
1988 err_up:
1989         atl1e_free_irq(adapter);
1990 err_req_irq:
1991         atl1e_free_ring_resources(adapter);
1992         atl1e_reset_hw(&adapter->hw);
1993
1994         return err;
1995 }
1996
1997 /*
1998  * atl1e_close - Disables a network interface
1999  * @netdev: network interface device structure
2000  *
2001  * Returns 0, this is not allowed to fail
2002  *
2003  * The close entry point is called when an interface is de-activated
2004  * by the OS.  The hardware is still under the drivers control, but
2005  * needs to be disabled.  A global MAC reset is issued to stop the
2006  * hardware, and all transmit and receive resources are freed.
2007  */
2008 static int atl1e_close(struct net_device *netdev)
2009 {
2010         struct atl1e_adapter *adapter = netdev_priv(netdev);
2011
2012         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2013         atl1e_down(adapter);
2014         atl1e_free_irq(adapter);
2015         atl1e_free_ring_resources(adapter);
2016
2017         return 0;
2018 }
2019
2020 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2021 {
2022         struct net_device *netdev = pci_get_drvdata(pdev);
2023         struct atl1e_adapter *adapter = netdev_priv(netdev);
2024         struct atl1e_hw *hw = &adapter->hw;
2025         u32 ctrl = 0;
2026         u32 mac_ctrl_data = 0;
2027         u32 wol_ctrl_data = 0;
2028         u16 mii_advertise_data = 0;
2029         u16 mii_bmsr_data = 0;
2030         u16 mii_intr_status_data = 0;
2031         u32 wufc = adapter->wol;
2032         u32 i;
2033 #ifdef CONFIG_PM
2034         int retval = 0;
2035 #endif
2036
2037         if (netif_running(netdev)) {
2038                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2039                 atl1e_down(adapter);
2040         }
2041         netif_device_detach(netdev);
2042
2043 #ifdef CONFIG_PM
2044         retval = pci_save_state(pdev);
2045         if (retval)
2046                 return retval;
2047 #endif
2048
2049         if (wufc) {
2050                 /* get link status */
2051                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2052                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2053
2054                 mii_advertise_data = ADVERTISE_10HALF;
2055
2056                 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2057                     (atl1e_write_phy_reg(hw,
2058                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2059                     (atl1e_phy_commit(hw)) != 0) {
2060                         netdev_dbg(adapter->netdev, "set phy register failed\n");
2061                         goto wol_dis;
2062                 }
2063
2064                 hw->phy_configured = false; /* re-init PHY when resume */
2065
2066                 /* turn on magic packet wol */
2067                 if (wufc & AT_WUFC_MAG)
2068                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2069
2070                 if (wufc & AT_WUFC_LNKC) {
2071                 /* if orignal link status is link, just wait for retrive link */
2072                         if (mii_bmsr_data & BMSR_LSTATUS) {
2073                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2074                                         msleep(100);
2075                                         atl1e_read_phy_reg(hw, MII_BMSR,
2076                                                         (u16 *)&mii_bmsr_data);
2077                                         if (mii_bmsr_data & BMSR_LSTATUS)
2078                                                 break;
2079                                 }
2080
2081                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2082                                         netdev_dbg(adapter->netdev,
2083                                                    "Link may change when suspend\n");
2084                         }
2085                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2086                         /* only link up can wake up */
2087                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2088                                 netdev_dbg(adapter->netdev,
2089                                            "read write phy register failed\n");
2090                                 goto wol_dis;
2091                         }
2092                 }
2093                 /* clear phy interrupt */
2094                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2095                 /* Config MAC Ctrl register */
2096                 mac_ctrl_data = MAC_CTRL_RX_EN;
2097                 /* set to 10/100M halt duplex */
2098                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2099                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2100                                  MAC_CTRL_PRMLEN_MASK) <<
2101                                  MAC_CTRL_PRMLEN_SHIFT);
2102
2103                 if (adapter->vlgrp)
2104                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2105
2106                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2107                 if (wufc & AT_WUFC_MAG)
2108                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2109
2110                 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2111                            mac_ctrl_data);
2112
2113                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2114                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2115                 /* pcie patch */
2116                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2117                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2118                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2119                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2120                 goto suspend_exit;
2121         }
2122 wol_dis:
2123
2124         /* WOL disabled */
2125         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2126
2127         /* pcie patch */
2128         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2129         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2130         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2131
2132         atl1e_force_ps(hw);
2133         hw->phy_configured = false; /* re-init PHY when resume */
2134
2135         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2136
2137 suspend_exit:
2138
2139         if (netif_running(netdev))
2140                 atl1e_free_irq(adapter);
2141
2142         pci_disable_device(pdev);
2143
2144         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2145
2146         return 0;
2147 }
2148
2149 #ifdef CONFIG_PM
2150 static int atl1e_resume(struct pci_dev *pdev)
2151 {
2152         struct net_device *netdev = pci_get_drvdata(pdev);
2153         struct atl1e_adapter *adapter = netdev_priv(netdev);
2154         u32 err;
2155
2156         pci_set_power_state(pdev, PCI_D0);
2157         pci_restore_state(pdev);
2158
2159         err = pci_enable_device(pdev);
2160         if (err) {
2161                 netdev_err(adapter->netdev,
2162                            "Cannot enable PCI device from suspend\n");
2163                 return err;
2164         }
2165
2166         pci_set_master(pdev);
2167
2168         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2169
2170         pci_enable_wake(pdev, PCI_D3hot, 0);
2171         pci_enable_wake(pdev, PCI_D3cold, 0);
2172
2173         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2174
2175         if (netif_running(netdev)) {
2176                 err = atl1e_request_irq(adapter);
2177                 if (err)
2178                         return err;
2179         }
2180
2181         atl1e_reset_hw(&adapter->hw);
2182
2183         if (netif_running(netdev))
2184                 atl1e_up(adapter);
2185
2186         netif_device_attach(netdev);
2187
2188         return 0;
2189 }
2190 #endif
2191
2192 static void atl1e_shutdown(struct pci_dev *pdev)
2193 {
2194         atl1e_suspend(pdev, PMSG_SUSPEND);
2195 }
2196
2197 static const struct net_device_ops atl1e_netdev_ops = {
2198         .ndo_open               = atl1e_open,
2199         .ndo_stop               = atl1e_close,
2200         .ndo_start_xmit         = atl1e_xmit_frame,
2201         .ndo_get_stats          = atl1e_get_stats,
2202         .ndo_set_multicast_list = atl1e_set_multi,
2203         .ndo_validate_addr      = eth_validate_addr,
2204         .ndo_set_mac_address    = atl1e_set_mac_addr,
2205         .ndo_change_mtu         = atl1e_change_mtu,
2206         .ndo_do_ioctl           = atl1e_ioctl,
2207         .ndo_tx_timeout         = atl1e_tx_timeout,
2208         .ndo_vlan_rx_register   = atl1e_vlan_rx_register,
2209 #ifdef CONFIG_NET_POLL_CONTROLLER
2210         .ndo_poll_controller    = atl1e_netpoll,
2211 #endif
2212
2213 };
2214
2215 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2216 {
2217         SET_NETDEV_DEV(netdev, &pdev->dev);
2218         pci_set_drvdata(pdev, netdev);
2219
2220         netdev->irq  = pdev->irq;
2221         netdev->netdev_ops = &atl1e_netdev_ops;
2222
2223         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2224         atl1e_set_ethtool_ops(netdev);
2225
2226         netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM |
2227                 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2228         netdev->features |= NETIF_F_LLTX;
2229         netdev->features |= NETIF_F_TSO;
2230
2231         return 0;
2232 }
2233
2234 /*
2235  * atl1e_probe - Device Initialization Routine
2236  * @pdev: PCI device information struct
2237  * @ent: entry in atl1e_pci_tbl
2238  *
2239  * Returns 0 on success, negative on failure
2240  *
2241  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2242  * The OS initialization, configuring of the adapter private structure,
2243  * and a hardware reset occur.
2244  */
2245 static int __devinit atl1e_probe(struct pci_dev *pdev,
2246                                  const struct pci_device_id *ent)
2247 {
2248         struct net_device *netdev;
2249         struct atl1e_adapter *adapter = NULL;
2250         static int cards_found;
2251
2252         int err = 0;
2253
2254         err = pci_enable_device(pdev);
2255         if (err) {
2256                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2257                 return err;
2258         }
2259
2260         /*
2261          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2262          * shared register for the high 32 bits, so only a single, aligned,
2263          * 4 GB physical address range can be used at a time.
2264          *
2265          * Supporting 64-bit DMA on this hardware is more trouble than it's
2266          * worth.  It is far easier to limit to 32-bit DMA than update
2267          * various kernel subsystems to support the mechanics required by a
2268          * fixed-high-32-bit system.
2269          */
2270         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2271             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2272                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2273                 goto err_dma;
2274         }
2275
2276         err = pci_request_regions(pdev, atl1e_driver_name);
2277         if (err) {
2278                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2279                 goto err_pci_reg;
2280         }
2281
2282         pci_set_master(pdev);
2283
2284         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2285         if (netdev == NULL) {
2286                 err = -ENOMEM;
2287                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2288                 goto err_alloc_etherdev;
2289         }
2290
2291         err = atl1e_init_netdev(netdev, pdev);
2292         if (err) {
2293                 netdev_err(netdev, "init netdevice failed\n");
2294                 goto err_init_netdev;
2295         }
2296         adapter = netdev_priv(netdev);
2297         adapter->bd_number = cards_found;
2298         adapter->netdev = netdev;
2299         adapter->pdev = pdev;
2300         adapter->hw.adapter = adapter;
2301         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2302         if (!adapter->hw.hw_addr) {
2303                 err = -EIO;
2304                 netdev_err(netdev, "cannot map device registers\n");
2305                 goto err_ioremap;
2306         }
2307         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2308
2309         /* init mii data */
2310         adapter->mii.dev = netdev;
2311         adapter->mii.mdio_read  = atl1e_mdio_read;
2312         adapter->mii.mdio_write = atl1e_mdio_write;
2313         adapter->mii.phy_id_mask = 0x1f;
2314         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2315
2316         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2317
2318         init_timer(&adapter->phy_config_timer);
2319         adapter->phy_config_timer.function = atl1e_phy_config;
2320         adapter->phy_config_timer.data = (unsigned long) adapter;
2321
2322         /* get user settings */
2323         atl1e_check_options(adapter);
2324         /*
2325          * Mark all PCI regions associated with PCI device
2326          * pdev as being reserved by owner atl1e_driver_name
2327          * Enables bus-mastering on the device and calls
2328          * pcibios_set_master to do the needed arch specific settings
2329          */
2330         atl1e_setup_pcicmd(pdev);
2331         /* setup the private structure */
2332         err = atl1e_sw_init(adapter);
2333         if (err) {
2334                 netdev_err(netdev, "net device private data init failed\n");
2335                 goto err_sw_init;
2336         }
2337
2338         /* Init GPHY as early as possible due to power saving issue  */
2339         atl1e_phy_init(&adapter->hw);
2340         /* reset the controller to
2341          * put the device in a known good starting state */
2342         err = atl1e_reset_hw(&adapter->hw);
2343         if (err) {
2344                 err = -EIO;
2345                 goto err_reset;
2346         }
2347
2348         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2349                 err = -EIO;
2350                 netdev_err(netdev, "get mac address failed\n");
2351                 goto err_eeprom;
2352         }
2353
2354         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2355         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2356         netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2357
2358         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2359         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2360         err = register_netdev(netdev);
2361         if (err) {
2362                 netdev_err(netdev, "register netdevice failed\n");
2363                 goto err_register;
2364         }
2365
2366         /* assume we have no link for now */
2367         netif_stop_queue(netdev);
2368         netif_carrier_off(netdev);
2369
2370         cards_found++;
2371
2372         return 0;
2373
2374 err_reset:
2375 err_register:
2376 err_sw_init:
2377 err_eeprom:
2378         iounmap(adapter->hw.hw_addr);
2379 err_init_netdev:
2380 err_ioremap:
2381         free_netdev(netdev);
2382 err_alloc_etherdev:
2383         pci_release_regions(pdev);
2384 err_pci_reg:
2385 err_dma:
2386         pci_disable_device(pdev);
2387         return err;
2388 }
2389
2390 /*
2391  * atl1e_remove - Device Removal Routine
2392  * @pdev: PCI device information struct
2393  *
2394  * atl1e_remove is called by the PCI subsystem to alert the driver
2395  * that it should release a PCI device.  The could be caused by a
2396  * Hot-Plug event, or because the driver is going to be removed from
2397  * memory.
2398  */
2399 static void __devexit atl1e_remove(struct pci_dev *pdev)
2400 {
2401         struct net_device *netdev = pci_get_drvdata(pdev);
2402         struct atl1e_adapter *adapter = netdev_priv(netdev);
2403
2404         /*
2405          * flush_scheduled work may reschedule our watchdog task, so
2406          * explicitly disable watchdog tasks from being rescheduled
2407          */
2408         set_bit(__AT_DOWN, &adapter->flags);
2409
2410         atl1e_del_timer(adapter);
2411         atl1e_cancel_work(adapter);
2412
2413         unregister_netdev(netdev);
2414         atl1e_free_ring_resources(adapter);
2415         atl1e_force_ps(&adapter->hw);
2416         iounmap(adapter->hw.hw_addr);
2417         pci_release_regions(pdev);
2418         free_netdev(netdev);
2419         pci_disable_device(pdev);
2420 }
2421
2422 /*
2423  * atl1e_io_error_detected - called when PCI error is detected
2424  * @pdev: Pointer to PCI device
2425  * @state: The current pci connection state
2426  *
2427  * This function is called after a PCI bus error affecting
2428  * this device has been detected.
2429  */
2430 static pci_ers_result_t
2431 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2432 {
2433         struct net_device *netdev = pci_get_drvdata(pdev);
2434         struct atl1e_adapter *adapter = netdev_priv(netdev);
2435
2436         netif_device_detach(netdev);
2437
2438         if (state == pci_channel_io_perm_failure)
2439                 return PCI_ERS_RESULT_DISCONNECT;
2440
2441         if (netif_running(netdev))
2442                 atl1e_down(adapter);
2443
2444         pci_disable_device(pdev);
2445
2446         /* Request a slot slot reset. */
2447         return PCI_ERS_RESULT_NEED_RESET;
2448 }
2449
2450 /*
2451  * atl1e_io_slot_reset - called after the pci bus has been reset.
2452  * @pdev: Pointer to PCI device
2453  *
2454  * Restart the card from scratch, as if from a cold-boot. Implementation
2455  * resembles the first-half of the e1000_resume routine.
2456  */
2457 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2458 {
2459         struct net_device *netdev = pci_get_drvdata(pdev);
2460         struct atl1e_adapter *adapter = netdev_priv(netdev);
2461
2462         if (pci_enable_device(pdev)) {
2463                 netdev_err(adapter->netdev,
2464                            "Cannot re-enable PCI device after reset\n");
2465                 return PCI_ERS_RESULT_DISCONNECT;
2466         }
2467         pci_set_master(pdev);
2468
2469         pci_enable_wake(pdev, PCI_D3hot, 0);
2470         pci_enable_wake(pdev, PCI_D3cold, 0);
2471
2472         atl1e_reset_hw(&adapter->hw);
2473
2474         return PCI_ERS_RESULT_RECOVERED;
2475 }
2476
2477 /*
2478  * atl1e_io_resume - called when traffic can start flowing again.
2479  * @pdev: Pointer to PCI device
2480  *
2481  * This callback is called when the error recovery driver tells us that
2482  * its OK to resume normal operation. Implementation resembles the
2483  * second-half of the atl1e_resume routine.
2484  */
2485 static void atl1e_io_resume(struct pci_dev *pdev)
2486 {
2487         struct net_device *netdev = pci_get_drvdata(pdev);
2488         struct atl1e_adapter *adapter = netdev_priv(netdev);
2489
2490         if (netif_running(netdev)) {
2491                 if (atl1e_up(adapter)) {
2492                         netdev_err(adapter->netdev,
2493                                    "can't bring device back up after reset\n");
2494                         return;
2495                 }
2496         }
2497
2498         netif_device_attach(netdev);
2499 }
2500
2501 static struct pci_error_handlers atl1e_err_handler = {
2502         .error_detected = atl1e_io_error_detected,
2503         .slot_reset = atl1e_io_slot_reset,
2504         .resume = atl1e_io_resume,
2505 };
2506
2507 static struct pci_driver atl1e_driver = {
2508         .name     = atl1e_driver_name,
2509         .id_table = atl1e_pci_tbl,
2510         .probe    = atl1e_probe,
2511         .remove   = __devexit_p(atl1e_remove),
2512         /* Power Management Hooks */
2513 #ifdef CONFIG_PM
2514         .suspend  = atl1e_suspend,
2515         .resume   = atl1e_resume,
2516 #endif
2517         .shutdown = atl1e_shutdown,
2518         .err_handler = &atl1e_err_handler
2519 };
2520
2521 /*
2522  * atl1e_init_module - Driver Registration Routine
2523  *
2524  * atl1e_init_module is the first routine called when the driver is
2525  * loaded. All it does is register with the PCI subsystem.
2526  */
2527 static int __init atl1e_init_module(void)
2528 {
2529         return pci_register_driver(&atl1e_driver);
2530 }
2531
2532 /*
2533  * atl1e_exit_module - Driver Exit Cleanup Routine
2534  *
2535  * atl1e_exit_module is called just before the driver is removed
2536  * from memory.
2537  */
2538 static void __exit atl1e_exit_module(void)
2539 {
2540         pci_unregister_driver(&atl1e_driver);
2541 }
2542
2543 module_init(atl1e_init_module);
2544 module_exit(atl1e_exit_module);