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 struct pci_device_id atl1e_pci_tbl[] = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
  40         /* required last entry */
  41         { 0 }
  42 };
  43 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  44
  45 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  46 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  47 MODULE_LICENSE("GPL");
  48 MODULE_VERSION(DRV_VERSION);
  49
  50 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  51
  52 static const u16
  53 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  54 {
  55         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  56         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  57         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  58         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  59 };
  60
  61 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  62 {
  63         REG_RXF0_BASE_ADDR_HI,
  64         REG_RXF1_BASE_ADDR_HI,
  65         REG_RXF2_BASE_ADDR_HI,
  66         REG_RXF3_BASE_ADDR_HI
  67 };
  68
  69 static const u16
  70 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  71 {
  72         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  73         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  74         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  75         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  76 };
  77
  78 static const u16
  79 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  80 {
  81         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  82         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  83         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  84         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  85 };
  86
  87 static const u16 atl1e_pay_load_size[] = {
  88         128, 256, 512, 1024, 2048, 4096,
  89 };
  90
  91 /*
  92  * atl1e_irq_enable - Enable default interrupt generation settings
  93  * @adapter: board private structure
  94  */
  95 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  96 {
  97         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  98                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
  99                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
 100                 AT_WRITE_FLUSH(&adapter->hw);
 101         }
 102 }
 103
 104 /*
 105  * atl1e_irq_disable - Mask off interrupt generation on the NIC
 106  * @adapter: board private structure
 107  */
 108 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
 109 {
 110         atomic_inc(&adapter->irq_sem);
 111         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 112         AT_WRITE_FLUSH(&adapter->hw);
 113         synchronize_irq(adapter->pdev->irq);
 114 }
 115
 116 /*
 117  * atl1e_irq_reset - reset interrupt confiure on the NIC
 118  * @adapter: board private structure
 119  */
 120 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 121 {
 122         atomic_set(&adapter->irq_sem, 0);
 123         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 124         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 125         AT_WRITE_FLUSH(&adapter->hw);
 126 }
 127
 128 /*
 129  * atl1e_phy_config - Timer Call-back
 130  * @data: pointer to netdev cast into an unsigned long
 131  */
 132 static void atl1e_phy_config(unsigned long data)
 133 {
 134         struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
 135         struct atl1e_hw *hw = &adapter->hw;
 136         unsigned long flags;
 137
 138         spin_lock_irqsave(&adapter->mdio_lock, flags);
 139         atl1e_restart_autoneg(hw);
 140         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 141 }
 142
 143 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 144 {
 145
 146         WARN_ON(in_interrupt());
 147         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 148                 msleep(1);
 149         atl1e_down(adapter);
 150         atl1e_up(adapter);
 151         clear_bit(__AT_RESETTING, &adapter->flags);
 152 }
 153
 154 static void atl1e_reset_task(struct work_struct *work)
 155 {
 156         struct atl1e_adapter *adapter;
 157         adapter = container_of(work, struct atl1e_adapter, reset_task);
 158
 159         atl1e_reinit_locked(adapter);
 160 }
 161
 162 static int atl1e_check_link(struct atl1e_adapter *adapter)
 163 {
 164         struct atl1e_hw *hw = &adapter->hw;
 165         struct net_device *netdev = adapter->netdev;
 166         struct pci_dev    *pdev   = adapter->pdev;
 167         int err = 0;
 168         u16 speed, duplex, phy_data;
 169
 170         /* MII_BMSR must read twise */
 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                         dev_info(&pdev->dev,
 198                                 "%s: %s NIC Link is Up<%d Mbps %s>\n",
 199                                 atl1e_driver_name, netdev->name,
 200                                 adapter->link_speed,
 201                                 adapter->link_duplex == FULL_DUPLEX ?
 202                                 "Full Duplex" : "Half Duplex");
 203                 }
 204
 205                 if (!netif_carrier_ok(netdev)) {
 206                         /* Link down -> Up */
 207                         netif_carrier_on(netdev);
 208                         netif_wake_queue(netdev);
 209                 }
 210         }
 211         return 0;
 212 }
 213
 214 /*
 215  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 216  * @netdev: network interface device structure
 217  */
 218 static void atl1e_link_chg_task(struct work_struct *work)
 219 {
 220         struct atl1e_adapter *adapter;
 221         unsigned long flags;
 222
 223         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 224         spin_lock_irqsave(&adapter->mdio_lock, flags);
 225         atl1e_check_link(adapter);
 226         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 227 }
 228
 229 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 230 {
 231         struct net_device *netdev = adapter->netdev;
 232         struct pci_dev    *pdev   = adapter->pdev;
 233         u16 phy_data = 0;
 234         u16 link_up = 0;
 235
 236         spin_lock(&adapter->mdio_lock);
 237         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 238         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 239         spin_unlock(&adapter->mdio_lock);
 240         link_up = phy_data & BMSR_LSTATUS;
 241         /* notify upper layer link down ASAP */
 242         if (!link_up) {
 243                 if (netif_carrier_ok(netdev)) {
 244                         /* old link state: Up */
 245                         dev_info(&pdev->dev, "%s: %s NIC Link is Down\n",
 246                                         atl1e_driver_name, netdev->name);
 247                         adapter->link_speed = SPEED_0;
 248                         netif_stop_queue(netdev);
 249                 }
 250         }
 251         schedule_work(&adapter->link_chg_task);
 252 }
 253
 254 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 255 {
 256         del_timer_sync(&adapter->phy_config_timer);
 257 }
 258
 259 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 260 {
 261         cancel_work_sync(&adapter->reset_task);
 262         cancel_work_sync(&adapter->link_chg_task);
 263 }
 264
 265 /*
 266  * atl1e_tx_timeout - Respond to a Tx Hang
 267  * @netdev: network interface device structure
 268  */
 269 static void atl1e_tx_timeout(struct net_device *netdev)
 270 {
 271         struct atl1e_adapter *adapter = netdev_priv(netdev);
 272
 273         /* Do the reset outside of interrupt context */
 274         schedule_work(&adapter->reset_task);
 275 }
 276
 277 /*
 278  * atl1e_set_multi - Multicast and Promiscuous mode set
 279  * @netdev: network interface device structure
 280  *
 281  * The set_multi entry point is called whenever the multicast address
 282  * list or the network interface flags are updated.  This routine is
 283  * responsible for configuring the hardware for proper multicast,
 284  * promiscuous mode, and all-multi behavior.
 285  */
 286 static void atl1e_set_multi(struct net_device *netdev)
 287 {
 288         struct atl1e_adapter *adapter = netdev_priv(netdev);
 289         struct atl1e_hw *hw = &adapter->hw;
 290         struct dev_mc_list *mc_ptr;
 291         u32 mac_ctrl_data = 0;
 292         u32 hash_value;
 293
 294         /* Check for Promiscuous and All Multicast modes */
 295         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 296
 297         if (netdev->flags & IFF_PROMISC) {
 298                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 299         } else if (netdev->flags & IFF_ALLMULTI) {
 300                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 301                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 302         } else {
 303                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 304         }
 305
 306         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 307
 308         /* clear the old settings from the multicast hash table */
 309         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 310         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 311
 312         /* comoute mc addresses' hash value ,and put it into hash table */
 313         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 314                 hash_value = atl1e_hash_mc_addr(hw, mc_ptr->dmi_addr);
 315                 atl1e_hash_set(hw, hash_value);
 316         }
 317 }
 318
 319 static void atl1e_vlan_rx_register(struct net_device *netdev,
 320                                    struct vlan_group *grp)
 321 {
 322         struct atl1e_adapter *adapter = netdev_priv(netdev);
 323         struct pci_dev *pdev = adapter->pdev;
 324         u32 mac_ctrl_data = 0;
 325
 326         dev_dbg(&pdev->dev, "atl1e_vlan_rx_register\n");
 327
 328         atl1e_irq_disable(adapter);
 329
 330         adapter->vlgrp = grp;
 331         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 332
 333         if (grp) {
 334                 /* enable VLAN tag insert/strip */
 335                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 336         } else {
 337                 /* disable VLAN tag insert/strip */
 338                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 339         }
 340
 341         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 342         atl1e_irq_enable(adapter);
 343 }
 344
 345 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 346 {
 347         struct pci_dev *pdev = adapter->pdev;
 348
 349         dev_dbg(&pdev->dev, "atl1e_restore_vlan !");
 350         atl1e_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 351 }
 352 /*
 353  * atl1e_set_mac - Change the Ethernet Address of the NIC
 354  * @netdev: network interface device structure
 355  * @p: pointer to an address structure
 356  *
 357  * Returns 0 on success, negative on failure
 358  */
 359 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 360 {
 361         struct atl1e_adapter *adapter = netdev_priv(netdev);
 362         struct sockaddr *addr = p;
 363
 364         if (!is_valid_ether_addr(addr->sa_data))
 365                 return -EADDRNOTAVAIL;
 366
 367         if (netif_running(netdev))
 368                 return -EBUSY;
 369
 370         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 371         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 372
 373         atl1e_hw_set_mac_addr(&adapter->hw);
 374
 375         return 0;
 376 }
 377
 378 /*
 379  * atl1e_change_mtu - Change the Maximum Transfer Unit
 380  * @netdev: network interface device structure
 381  * @new_mtu: new value for maximum frame size
 382  *
 383  * Returns 0 on success, negative on failure
 384  */
 385 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 386 {
 387         struct atl1e_adapter *adapter = netdev_priv(netdev);
 388         int old_mtu   = netdev->mtu;
 389         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 390
 391         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 392                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 393                 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 394                 return -EINVAL;
 395         }
 396         /* set MTU */
 397         if (old_mtu != new_mtu && netif_running(netdev)) {
 398                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 399                         msleep(1);
 400                 netdev->mtu = new_mtu;
 401                 adapter->hw.max_frame_size = new_mtu;
 402                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 403                 atl1e_down(adapter);
 404                 atl1e_up(adapter);
 405                 clear_bit(__AT_RESETTING, &adapter->flags);
 406         }
 407         return 0;
 408 }
 409
 410 /*
 411  *  caller should hold mdio_lock
 412  */
 413 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 414 {
 415         struct atl1e_adapter *adapter = netdev_priv(netdev);
 416         u16 result;
 417
 418         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 419         return result;
 420 }
 421
 422 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 423                              int reg_num, int val)
 424 {
 425         struct atl1e_adapter *adapter = netdev_priv(netdev);
 426
 427         atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 428 }
 429
 430 /*
 431  * atl1e_mii_ioctl -
 432  * @netdev:
 433  * @ifreq:
 434  * @cmd:
 435  */
 436 static int atl1e_mii_ioctl(struct net_device *netdev,
 437                            struct ifreq *ifr, int cmd)
 438 {
 439         struct atl1e_adapter *adapter = netdev_priv(netdev);
 440         struct pci_dev *pdev = adapter->pdev;
 441         struct mii_ioctl_data *data = if_mii(ifr);
 442         unsigned long flags;
 443         int retval = 0;
 444
 445         if (!netif_running(netdev))
 446                 return -EINVAL;
 447
 448         spin_lock_irqsave(&adapter->mdio_lock, flags);
 449         switch (cmd) {
 450         case SIOCGMIIPHY:
 451                 data->phy_id = 0;
 452                 break;
 453
 454         case SIOCGMIIREG:
 455                 if (!capable(CAP_NET_ADMIN)) {
 456                         retval = -EPERM;
 457                         goto out;
 458                 }
 459                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 460                                     &data->val_out)) {
 461                         retval = -EIO;
 462                         goto out;
 463                 }
 464                 break;
 465
 466         case SIOCSMIIREG:
 467                 if (!capable(CAP_NET_ADMIN)) {
 468                         retval = -EPERM;
 469                         goto out;
 470                 }
 471                 if (data->reg_num & ~(0x1F)) {
 472                         retval = -EFAULT;
 473                         goto out;
 474                 }
 475
 476                 dev_dbg(&pdev->dev, "<atl1e_mii_ioctl> write %x %x",
 477                                 data->reg_num, data->val_in);
 478                 if (atl1e_write_phy_reg(&adapter->hw,
 479                                      data->reg_num, data->val_in)) {
 480                         retval = -EIO;
 481                         goto out;
 482                 }
 483                 break;
 484
 485         default:
 486                 retval = -EOPNOTSUPP;
 487                 break;
 488         }
 489 out:
 490         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 491         return retval;
 492
 493 }
 494
 495 /*
 496  * atl1e_ioctl -
 497  * @netdev:
 498  * @ifreq:
 499  * @cmd:
 500  */
 501 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 502 {
 503         switch (cmd) {
 504         case SIOCGMIIPHY:
 505         case SIOCGMIIREG:
 506         case SIOCSMIIREG:
 507                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 508         default:
 509                 return -EOPNOTSUPP;
 510         }
 511 }
 512
 513 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 514 {
 515         u16 cmd;
 516
 517         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 518         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 519         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 520         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 521
 522         /*
 523          * some motherboards BIOS(PXE/EFI) driver may set PME
 524          * while they transfer control to OS (Windows/Linux)
 525          * so we should clear this bit before NIC work normally
 526          */
 527         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 528         msleep(1);
 529 }
 530
 531 /*
 532  * atl1e_alloc_queues - Allocate memory for all rings
 533  * @adapter: board private structure to initialize
 534  *
 535  */
 536 static int __devinit atl1e_alloc_queues(struct atl1e_adapter *adapter)
 537 {
 538         return 0;
 539 }
 540
 541 /*
 542  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 543  * @adapter: board private structure to initialize
 544  *
 545  * atl1e_sw_init initializes the Adapter private data structure.
 546  * Fields are initialized based on PCI device information and
 547  * OS network device settings (MTU size).
 548  */
 549 static int __devinit atl1e_sw_init(struct atl1e_adapter *adapter)
 550 {
 551         struct atl1e_hw *hw   = &adapter->hw;
 552         struct pci_dev  *pdev = adapter->pdev;
 553         u32 phy_status_data = 0;
 554
 555         adapter->wol = 0;
 556         adapter->link_speed = SPEED_0;   /* hardware init */
 557         adapter->link_duplex = FULL_DUPLEX;
 558         adapter->num_rx_queues = 1;
 559
 560         /* PCI config space info */
 561         hw->vendor_id = pdev->vendor;
 562         hw->device_id = pdev->device;
 563         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 564         hw->subsystem_id = pdev->subsystem_device;
 565
 566         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 567         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 568
 569         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 570         /* nic type */
 571         if (hw->revision_id >= 0xF0) {
 572                 hw->nic_type = athr_l2e_revB;
 573         } else {
 574                 if (phy_status_data & PHY_STATUS_100M)
 575                         hw->nic_type = athr_l1e;
 576                 else
 577                         hw->nic_type = athr_l2e_revA;
 578         }
 579
 580         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 581
 582         if (phy_status_data & PHY_STATUS_EMI_CA)
 583                 hw->emi_ca = true;
 584         else
 585                 hw->emi_ca = false;
 586
 587         hw->phy_configured = false;
 588         hw->preamble_len = 7;
 589         hw->max_frame_size = adapter->netdev->mtu;
 590         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 591                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 592
 593         hw->rrs_type = atl1e_rrs_disable;
 594         hw->indirect_tab = 0;
 595         hw->base_cpu = 0;
 596
 597         /* need confirm */
 598
 599         hw->ict = 50000;                 /* 100ms */
 600         hw->smb_timer = 200000;          /* 200ms  */
 601         hw->tpd_burst = 5;
 602         hw->rrd_thresh = 1;
 603         hw->tpd_thresh = adapter->tx_ring.count / 2;
 604         hw->rx_count_down = 4;  /* 2us resolution */
 605         hw->tx_count_down = hw->imt * 4 / 3;
 606         hw->dmar_block = atl1e_dma_req_1024;
 607         hw->dmaw_block = atl1e_dma_req_1024;
 608         hw->dmar_dly_cnt = 15;
 609         hw->dmaw_dly_cnt = 4;
 610
 611         if (atl1e_alloc_queues(adapter)) {
 612                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 613                 return -ENOMEM;
 614         }
 615
 616         atomic_set(&adapter->irq_sem, 1);
 617         spin_lock_init(&adapter->mdio_lock);
 618         spin_lock_init(&adapter->tx_lock);
 619
 620         set_bit(__AT_DOWN, &adapter->flags);
 621
 622         return 0;
 623 }
 624
 625 /*
 626  * atl1e_clean_tx_ring - Free Tx-skb
 627  * @adapter: board private structure
 628  */
 629 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 630 {
 631         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
 632                                 &adapter->tx_ring;
 633         struct atl1e_tx_buffer *tx_buffer = NULL;
 634         struct pci_dev *pdev = adapter->pdev;
 635         u16 index, ring_count;
 636
 637         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 638                 return;
 639
 640         ring_count = tx_ring->count;
 641         /* first unmmap dma */
 642         for (index = 0; index < ring_count; index++) {
 643                 tx_buffer = &tx_ring->tx_buffer[index];
 644                 if (tx_buffer->dma) {
 645                         pci_unmap_page(pdev, tx_buffer->dma,
 646                                         tx_buffer->length, PCI_DMA_TODEVICE);
 647                         tx_buffer->dma = 0;
 648                 }
 649         }
 650         /* second free skb */
 651         for (index = 0; index < ring_count; index++) {
 652                 tx_buffer = &tx_ring->tx_buffer[index];
 653                 if (tx_buffer->skb) {
 654                         dev_kfree_skb_any(tx_buffer->skb);
 655                         tx_buffer->skb = NULL;
 656                 }
 657         }
 658         /* Zero out Tx-buffers */
 659         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 660                                 ring_count);
 661         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 662                                 ring_count);
 663 }
 664
 665 /*
 666  * atl1e_clean_rx_ring - Free rx-reservation skbs
 667  * @adapter: board private structure
 668  */
 669 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 670 {
 671         struct atl1e_rx_ring *rx_ring =
 672                 (struct atl1e_rx_ring *)&adapter->rx_ring;
 673         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 674         u16 i, j;
 675
 676
 677         if (adapter->ring_vir_addr == NULL)
 678                 return;
 679         /* Zero out the descriptor ring */
 680         for (i = 0; i < adapter->num_rx_queues; i++) {
 681                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 682                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 683                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 684                                                 rx_ring->real_page_size);
 685                         }
 686                 }
 687         }
 688 }
 689
 690 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 691 {
 692         *ring_size = ((u32)(adapter->tx_ring.count *
 693                      sizeof(struct atl1e_tpd_desc) + 7
 694                         /* tx ring, qword align */
 695                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 696                         adapter->num_rx_queues + 31
 697                         /* rx ring,  32 bytes align */
 698                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 699                         sizeof(u32) + 3));
 700                         /* tx, rx cmd, dword align   */
 701 }
 702
 703 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 704 {
 705         struct atl1e_tx_ring *tx_ring = NULL;
 706         struct atl1e_rx_ring *rx_ring = NULL;
 707
 708         tx_ring = &adapter->tx_ring;
 709         rx_ring = &adapter->rx_ring;
 710
 711         rx_ring->real_page_size = adapter->rx_ring.page_size
 712                                  + adapter->hw.max_frame_size
 713                                  + ETH_HLEN + VLAN_HLEN
 714                                  + ETH_FCS_LEN;
 715         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 716         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 717
 718         adapter->ring_vir_addr = NULL;
 719         adapter->rx_ring.desc = NULL;
 720         rwlock_init(&adapter->tx_ring.tx_lock);
 721
 722         return;
 723 }
 724
 725 /*
 726  * Read / Write Ptr Initialize:
 727  */
 728 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 729 {
 730         struct atl1e_tx_ring *tx_ring = NULL;
 731         struct atl1e_rx_ring *rx_ring = NULL;
 732         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 733         int i, j;
 734
 735         tx_ring = &adapter->tx_ring;
 736         rx_ring = &adapter->rx_ring;
 737         rx_page_desc = rx_ring->rx_page_desc;
 738
 739         tx_ring->next_to_use = 0;
 740         atomic_set(&tx_ring->next_to_clean, 0);
 741
 742         for (i = 0; i < adapter->num_rx_queues; i++) {
 743                 rx_page_desc[i].rx_using  = 0;
 744                 rx_page_desc[i].rx_nxseq = 0;
 745                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 746                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 747                         rx_page_desc[i].rx_page[j].read_offset = 0;
 748                 }
 749         }
 750 }
 751
 752 /*
 753  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 754  * @adapter: board private structure
 755  *
 756  * Free all transmit software resources
 757  */
 758 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 759 {
 760         struct pci_dev *pdev = adapter->pdev;
 761
 762         atl1e_clean_tx_ring(adapter);
 763         atl1e_clean_rx_ring(adapter);
 764
 765         if (adapter->ring_vir_addr) {
 766                 pci_free_consistent(pdev, adapter->ring_size,
 767                                 adapter->ring_vir_addr, adapter->ring_dma);
 768                 adapter->ring_vir_addr = NULL;
 769         }
 770
 771         if (adapter->tx_ring.tx_buffer) {
 772                 kfree(adapter->tx_ring.tx_buffer);
 773                 adapter->tx_ring.tx_buffer = NULL;
 774         }
 775 }
 776
 777 /*
 778  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 779  * @adapter: board private structure
 780  *
 781  * Return 0 on success, negative on failure
 782  */
 783 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 784 {
 785         struct pci_dev *pdev = adapter->pdev;
 786         struct atl1e_tx_ring *tx_ring;
 787         struct atl1e_rx_ring *rx_ring;
 788         struct atl1e_rx_page_desc  *rx_page_desc;
 789         int size, i, j;
 790         u32 offset = 0;
 791         int err = 0;
 792
 793         if (adapter->ring_vir_addr != NULL)
 794                 return 0; /* alloced already */
 795
 796         tx_ring = &adapter->tx_ring;
 797         rx_ring = &adapter->rx_ring;
 798
 799         /* real ring DMA buffer */
 800
 801         size = adapter->ring_size;
 802         adapter->ring_vir_addr = pci_alloc_consistent(pdev,
 803                         adapter->ring_size, &adapter->ring_dma);
 804
 805         if (adapter->ring_vir_addr == NULL) {
 806                 dev_err(&pdev->dev, "pci_alloc_consistent failed, "
 807                                     "size = D%d", size);
 808                 return -ENOMEM;
 809         }
 810
 811         memset(adapter->ring_vir_addr, 0, adapter->ring_size);
 812
 813         rx_page_desc = rx_ring->rx_page_desc;
 814
 815         /* Init TPD Ring */
 816         tx_ring->dma = roundup(adapter->ring_dma, 8);
 817         offset = tx_ring->dma - adapter->ring_dma;
 818         tx_ring->desc = (struct atl1e_tpd_desc *)
 819                         (adapter->ring_vir_addr + offset);
 820         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 821         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 822         if (tx_ring->tx_buffer == NULL) {
 823                 dev_err(&pdev->dev, "kzalloc failed , size = D%d", size);
 824                 err = -ENOMEM;
 825                 goto failed;
 826         }
 827
 828         /* Init RXF-Pages */
 829         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 830         offset = roundup(offset, 32);
 831
 832         for (i = 0; i < adapter->num_rx_queues; i++) {
 833                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 834                         rx_page_desc[i].rx_page[j].dma =
 835                                 adapter->ring_dma + offset;
 836                         rx_page_desc[i].rx_page[j].addr =
 837                                 adapter->ring_vir_addr + offset;
 838                         offset += rx_ring->real_page_size;
 839                 }
 840         }
 841
 842         /* Init CMB dma address */
 843         tx_ring->cmb_dma = adapter->ring_dma + offset;
 844         tx_ring->cmb     = (u32 *)(adapter->ring_vir_addr + offset);
 845         offset += sizeof(u32);
 846
 847         for (i = 0; i < adapter->num_rx_queues; i++) {
 848                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 849                         rx_page_desc[i].rx_page[j].write_offset_dma =
 850                                 adapter->ring_dma + offset;
 851                         rx_page_desc[i].rx_page[j].write_offset_addr =
 852                                 adapter->ring_vir_addr + offset;
 853                         offset += sizeof(u32);
 854                 }
 855         }
 856
 857         if (unlikely(offset > adapter->ring_size)) {
 858                 dev_err(&pdev->dev, "offset(%d) > ring size(%d) !!\n",
 859                                 offset, adapter->ring_size);
 860                 err = -1;
 861                 goto failed;
 862         }
 863
 864         return 0;
 865 failed:
 866         if (adapter->ring_vir_addr != NULL) {
 867                 pci_free_consistent(pdev, adapter->ring_size,
 868                                 adapter->ring_vir_addr, adapter->ring_dma);
 869                 adapter->ring_vir_addr = NULL;
 870         }
 871         return err;
 872 }
 873
 874 static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter)
 875 {
 876
 877         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 878         struct atl1e_rx_ring *rx_ring =
 879                         (struct atl1e_rx_ring *)&adapter->rx_ring;
 880         struct atl1e_tx_ring *tx_ring =
 881                         (struct atl1e_tx_ring *)&adapter->tx_ring;
 882         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 883         int i, j;
 884
 885         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 886                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 887         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 888                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 889         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 890         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 891                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 892
 893         rx_page_desc = rx_ring->rx_page_desc;
 894         /* RXF Page Physical address / Page Length */
 895         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 896                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 897                                  (u32)((adapter->ring_dma &
 898                                  AT_DMA_HI_ADDR_MASK) >> 32));
 899                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 900                         u32 page_phy_addr;
 901                         u32 offset_phy_addr;
 902
 903                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 904                         offset_phy_addr =
 905                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 906
 907                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 908                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 909                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 910                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 911                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 912                 }
 913         }
 914         /* Page Length */
 915         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 916         /* Load all of base address above */
 917         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 918
 919         return;
 920 }
 921
 922 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 923 {
 924         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 925         u32 dev_ctrl_data = 0;
 926         u32 max_pay_load = 0;
 927         u32 jumbo_thresh = 0;
 928         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 929
 930         /* configure TXQ param */
 931         if (hw->nic_type != athr_l2e_revB) {
 932                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 933                 if (hw->max_frame_size <= 1500) {
 934                         jumbo_thresh = hw->max_frame_size + extra_size;
 935                 } else if (hw->max_frame_size < 6*1024) {
 936                         jumbo_thresh =
 937                                 (hw->max_frame_size + extra_size) * 2 / 3;
 938                 } else {
 939                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 940                 }
 941                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 942         }
 943
 944         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 945
 946         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 947                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 948
 949         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
 950
 951         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 952                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 953         hw->dmar_block = min(max_pay_load, hw->dmar_block);
 954
 955         if (hw->nic_type != athr_l2e_revB)
 956                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 957                               atl1e_pay_load_size[hw->dmar_block]);
 958         /* enable TXQ */
 959         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 960                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 961                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 962                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 963         return;
 964 }
 965
 966 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 967 {
 968         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 969         u32 rxf_len  = 0;
 970         u32 rxf_low  = 0;
 971         u32 rxf_high = 0;
 972         u32 rxf_thresh_data = 0;
 973         u32 rxq_ctrl_data = 0;
 974
 975         if (hw->nic_type != athr_l2e_revB) {
 976                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 977                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 978                               RXQ_JMBOSZ_TH_SHIFT |
 979                               (1 & RXQ_JMBO_LKAH_MASK) <<
 980                               RXQ_JMBO_LKAH_SHIFT));
 981
 982                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 983                 rxf_high = rxf_len * 4 / 5;
 984                 rxf_low  = rxf_len / 5;
 985                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 986                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 987                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 988                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 989
 990                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 991         }
 992
 993         /* RRS */
 994         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
 995         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
 996
 997         if (hw->rrs_type & atl1e_rrs_ipv4)
 998                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
 999
1000         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1001                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1002
1003         if (hw->rrs_type & atl1e_rrs_ipv6)
1004                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1005
1006         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1007                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1008
1009         if (hw->rrs_type != atl1e_rrs_disable)
1010                 rxq_ctrl_data |=
1011                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1012
1013         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1014                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1015
1016         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1017         return;
1018 }
1019
1020 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1021 {
1022         struct atl1e_hw *hw = &adapter->hw;
1023         u32 dma_ctrl_data = 0;
1024
1025         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1026         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1027                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1028         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1029                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1030         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1031         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1032                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1033         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1034                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1035
1036         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1037         return;
1038 }
1039
1040 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1041 {
1042         u32 value;
1043         struct atl1e_hw *hw = &adapter->hw;
1044         struct net_device *netdev = adapter->netdev;
1045
1046         /* Config MAC CTRL Register */
1047         value = MAC_CTRL_TX_EN |
1048                 MAC_CTRL_RX_EN ;
1049
1050         if (FULL_DUPLEX == adapter->link_duplex)
1051                 value |= MAC_CTRL_DUPLX;
1052
1053         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1054                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1055                           MAC_CTRL_SPEED_SHIFT);
1056         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1057
1058         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1059         value |= (((u32)adapter->hw.preamble_len &
1060                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1061
1062         if (adapter->vlgrp)
1063                 value |= MAC_CTRL_RMV_VLAN;
1064
1065         value |= MAC_CTRL_BC_EN;
1066         if (netdev->flags & IFF_PROMISC)
1067                 value |= MAC_CTRL_PROMIS_EN;
1068         if (netdev->flags & IFF_ALLMULTI)
1069                 value |= MAC_CTRL_MC_ALL_EN;
1070
1071         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1072 }
1073
1074 /*
1075  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1076  * @adapter: board private structure
1077  *
1078  * Configure the Tx /Rx unit of the MAC after a reset.
1079  */
1080 static int atl1e_configure(struct atl1e_adapter *adapter)
1081 {
1082         struct atl1e_hw *hw = &adapter->hw;
1083         struct pci_dev *pdev = adapter->pdev;
1084
1085         u32 intr_status_data = 0;
1086
1087         /* clear interrupt status */
1088         AT_WRITE_REG(hw, REG_ISR, ~0);
1089
1090         /* 1. set MAC Address */
1091         atl1e_hw_set_mac_addr(hw);
1092
1093         /* 2. Init the Multicast HASH table done by set_muti */
1094
1095         /* 3. Clear any WOL status */
1096         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1097
1098         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1099          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1100          *    High 32bits memory */
1101         atl1e_configure_des_ring(adapter);
1102
1103         /* 5. set Interrupt Moderator Timer */
1104         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1105         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1106         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1107                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1108
1109         /* 6. rx/tx threshold to trig interrupt */
1110         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1111         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1112         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1113         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1114
1115         /* 7. set Interrupt Clear Timer */
1116         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1117
1118         /* 8. set MTU */
1119         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1120                         VLAN_HLEN + ETH_FCS_LEN);
1121
1122         /* 9. config TXQ early tx threshold */
1123         atl1e_configure_tx(adapter);
1124
1125         /* 10. config RXQ */
1126         atl1e_configure_rx(adapter);
1127
1128         /* 11. config  DMA Engine */
1129         atl1e_configure_dma(adapter);
1130
1131         /* 12. smb timer to trig interrupt */
1132         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1133
1134         intr_status_data = AT_READ_REG(hw, REG_ISR);
1135         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1136                 dev_err(&pdev->dev, "atl1e_configure failed,"
1137                                 "PCIE phy link down\n");
1138                 return -1;
1139         }
1140
1141         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1142         return 0;
1143 }
1144
1145 /*
1146  * atl1e_get_stats - Get System Network Statistics
1147  * @netdev: network interface device structure
1148  *
1149  * Returns the address of the device statistics structure.
1150  * The statistics are actually updated from the timer callback.
1151  */
1152 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1153 {
1154         struct atl1e_adapter *adapter = netdev_priv(netdev);
1155         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1156         struct net_device_stats *net_stats = &adapter->net_stats;
1157
1158         net_stats->rx_packets = hw_stats->rx_ok;
1159         net_stats->tx_packets = hw_stats->tx_ok;
1160         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1161         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1162         net_stats->multicast  = hw_stats->rx_mcast;
1163         net_stats->collisions = hw_stats->tx_1_col +
1164                                 hw_stats->tx_2_col * 2 +
1165                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1166
1167         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1168                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1169                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1170         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1171         net_stats->rx_length_errors = hw_stats->rx_len_err;
1172         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1173         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1174         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1175
1176         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1177
1178         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1179                                hw_stats->tx_underrun + hw_stats->tx_trunc;
1180         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1181         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1182         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1183
1184         return &adapter->net_stats;
1185 }
1186
1187 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1188 {
1189         u16 hw_reg_addr = 0;
1190         unsigned long *stats_item = NULL;
1191
1192         /* update rx status */
1193         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1194         stats_item  = &adapter->hw_stats.rx_ok;
1195         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1196                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1197                 stats_item++;
1198                 hw_reg_addr += 4;
1199         }
1200         /* update tx status */
1201         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1202         stats_item  = &adapter->hw_stats.tx_ok;
1203         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1204                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1205                 stats_item++;
1206                 hw_reg_addr += 4;
1207         }
1208 }
1209
1210 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1211 {
1212         u16 phy_data;
1213
1214         spin_lock(&adapter->mdio_lock);
1215         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1216         spin_unlock(&adapter->mdio_lock);
1217 }
1218
1219 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1220 {
1221         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
1222                                         &adapter->tx_ring;
1223         struct atl1e_tx_buffer *tx_buffer = NULL;
1224         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1225         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1226
1227         while (next_to_clean != hw_next_to_clean) {
1228                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1229                 if (tx_buffer->dma) {
1230                         pci_unmap_page(adapter->pdev, tx_buffer->dma,
1231                                         tx_buffer->length, PCI_DMA_TODEVICE);
1232                         tx_buffer->dma = 0;
1233                 }
1234
1235                 if (tx_buffer->skb) {
1236                         dev_kfree_skb_irq(tx_buffer->skb);
1237                         tx_buffer->skb = NULL;
1238                 }
1239
1240                 if (++next_to_clean == tx_ring->count)
1241                         next_to_clean = 0;
1242         }
1243
1244         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1245
1246         if (netif_queue_stopped(adapter->netdev) &&
1247                         netif_carrier_ok(adapter->netdev)) {
1248                 netif_wake_queue(adapter->netdev);
1249         }
1250
1251         return true;
1252 }
1253
1254 /*
1255  * atl1e_intr - Interrupt Handler
1256  * @irq: interrupt number
1257  * @data: pointer to a network interface device structure
1258  * @pt_regs: CPU registers structure
1259  */
1260 static irqreturn_t atl1e_intr(int irq, void *data)
1261 {
1262         struct net_device *netdev  = data;
1263         struct atl1e_adapter *adapter = netdev_priv(netdev);
1264         struct pci_dev *pdev = adapter->pdev;
1265         struct atl1e_hw *hw = &adapter->hw;
1266         int max_ints = AT_MAX_INT_WORK;
1267         int handled = IRQ_NONE;
1268         u32 status;
1269
1270         do {
1271                 status = AT_READ_REG(hw, REG_ISR);
1272                 if ((status & IMR_NORMAL_MASK) == 0 ||
1273                                 (status & ISR_DIS_INT) != 0) {
1274                         if (max_ints != AT_MAX_INT_WORK)
1275                                 handled = IRQ_HANDLED;
1276                         break;
1277                 }
1278                 /* link event */
1279                 if (status & ISR_GPHY)
1280                         atl1e_clear_phy_int(adapter);
1281                 /* Ack ISR */
1282                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1283
1284                 handled = IRQ_HANDLED;
1285                 /* check if PCIE PHY Link down */
1286                 if (status & ISR_PHY_LINKDOWN) {
1287                         dev_err(&pdev->dev,
1288                                 "pcie phy linkdown %x\n", status);
1289                         if (netif_running(adapter->netdev)) {
1290                                 /* reset MAC */
1291                                 atl1e_irq_reset(adapter);
1292                                 schedule_work(&adapter->reset_task);
1293                                 break;
1294                         }
1295                 }
1296
1297                 /* check if DMA read/write error */
1298                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1299                         dev_err(&pdev->dev,
1300                                 "PCIE DMA RW error (status = 0x%x)\n",
1301                                 status);
1302                         atl1e_irq_reset(adapter);
1303                         schedule_work(&adapter->reset_task);
1304                         break;
1305                 }
1306
1307                 if (status & ISR_SMB)
1308                         atl1e_update_hw_stats(adapter);
1309
1310                 /* link event */
1311                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1312                         adapter->net_stats.tx_carrier_errors++;
1313                         atl1e_link_chg_event(adapter);
1314                         break;
1315                 }
1316
1317                 /* transmit event */
1318                 if (status & ISR_TX_EVENT)
1319                         atl1e_clean_tx_irq(adapter);
1320
1321                 if (status & ISR_RX_EVENT) {
1322                         /*
1323                          * disable rx interrupts, without
1324                          * the synchronize_irq bit
1325                          */
1326                         AT_WRITE_REG(hw, REG_IMR,
1327                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1328                         AT_WRITE_FLUSH(hw);
1329                         if (likely(netif_rx_schedule_prep(netdev,
1330                                    &adapter->napi)))
1331                                 __netif_rx_schedule(netdev, &adapter->napi);
1332                 }
1333         } while (--max_ints > 0);
1334         /* re-enable Interrupt*/
1335         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1336
1337         return handled;
1338 }
1339
1340 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1341                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1342 {
1343         u8 *packet = (u8 *)(prrs + 1);
1344         struct iphdr *iph;
1345         u16 head_len = ETH_HLEN;
1346         u16 pkt_flags;
1347         u16 err_flags;
1348
1349         skb->ip_summed = CHECKSUM_NONE;
1350         pkt_flags = prrs->pkt_flag;
1351         err_flags = prrs->err_flag;
1352         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1353                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1354                 if (pkt_flags & RRS_IS_IPV4) {
1355                         if (pkt_flags & RRS_IS_802_3)
1356                                 head_len += 8;
1357                         iph = (struct iphdr *) (packet + head_len);
1358                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1359                                 goto hw_xsum;
1360                 }
1361                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1362                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1363                         return;
1364                 }
1365         }
1366
1367 hw_xsum :
1368         return;
1369 }
1370
1371 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1372                                                u8 que)
1373 {
1374         struct atl1e_rx_page_desc *rx_page_desc =
1375                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1376         u8 rx_using = rx_page_desc[que].rx_using;
1377
1378         return (struct atl1e_rx_page *)&(rx_page_desc[que].rx_page[rx_using]);
1379 }
1380
1381 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1382                    int *work_done, int work_to_do)
1383 {
1384         struct pci_dev *pdev = adapter->pdev;
1385         struct net_device *netdev  = adapter->netdev;
1386         struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *)
1387                                          &adapter->rx_ring;
1388         struct atl1e_rx_page_desc *rx_page_desc =
1389                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1390         struct sk_buff *skb = NULL;
1391         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1392         u32 packet_size, write_offset;
1393         struct atl1e_recv_ret_status *prrs;
1394
1395         write_offset = *(rx_page->write_offset_addr);
1396         if (likely(rx_page->read_offset < write_offset)) {
1397                 do {
1398                         if (*work_done >= work_to_do)
1399                                 break;
1400                         (*work_done)++;
1401                         /* get new packet's  rrs */
1402                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1403                                                  rx_page->read_offset);
1404                         /* check sequence number */
1405                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1406                                 dev_err(&pdev->dev,
1407                                         "rx sequence number"
1408                                         " error (rx=%d) (expect=%d)\n",
1409                                         prrs->seq_num,
1410                                         rx_page_desc[que].rx_nxseq);
1411                                 rx_page_desc[que].rx_nxseq++;
1412                                 /* just for debug use */
1413                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1414                                              (((u32)prrs->seq_num) << 16) |
1415                                              rx_page_desc[que].rx_nxseq);
1416                                 goto fatal_err;
1417                         }
1418                         rx_page_desc[que].rx_nxseq++;
1419
1420                         /* error packet */
1421                         if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
1422                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1423                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1424                                         RRS_ERR_TRUNC)) {
1425                                 /* hardware error, discard this packet*/
1426                                         dev_err(&pdev->dev,
1427                                                 "rx packet desc error %x\n",
1428                                                 *((u32 *)prrs + 1));
1429                                         goto skip_pkt;
1430                                 }
1431                         }
1432
1433                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1434                                         RRS_PKT_SIZE_MASK) - 4; /* CRC */
1435                         skb = netdev_alloc_skb(netdev,
1436                                                packet_size + NET_IP_ALIGN);
1437                         if (skb == NULL) {
1438                                 dev_warn(&pdev->dev, "%s: Memory squeeze,"
1439                                         "deferring packet.\n", netdev->name);
1440                                 goto skip_pkt;
1441                         }
1442                         skb_reserve(skb, NET_IP_ALIGN);
1443                         skb->dev = netdev;
1444                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1445                         skb_put(skb, packet_size);
1446                         skb->protocol = eth_type_trans(skb, netdev);
1447                         atl1e_rx_checksum(adapter, skb, prrs);
1448
1449                         if (unlikely(adapter->vlgrp &&
1450                                 (prrs->pkt_flag & RRS_IS_VLAN_TAG))) {
1451                                 u16 vlan_tag = (prrs->vtag >> 4) |
1452                                                ((prrs->vtag & 7) << 13) |
1453                                                ((prrs->vtag & 8) << 9);
1454                                 dev_dbg(&pdev->dev,
1455                                         "RXD VLAN TAG<RRD>=0x%04x\n",
1456                                         prrs->vtag);
1457                                 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
1458                                                          vlan_tag);
1459                         } else {
1460                                 netif_receive_skb(skb);
1461                         }
1462
1463                         netdev->last_rx = jiffies;
1464 skip_pkt:
1465         /* skip current packet whether it's ok or not. */
1466                         rx_page->read_offset +=
1467                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1468                                 RRS_PKT_SIZE_MASK) +
1469                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1470                                                 0xFFFFFFE0);
1471
1472                         if (rx_page->read_offset >= rx_ring->page_size) {
1473                                 /* mark this page clean */
1474                                 u16 reg_addr;
1475                                 u8  rx_using;
1476
1477                                 rx_page->read_offset =
1478                                         *(rx_page->write_offset_addr) = 0;
1479                                 rx_using = rx_page_desc[que].rx_using;
1480                                 reg_addr =
1481                                         atl1e_rx_page_vld_regs[que][rx_using];
1482                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1483                                 rx_page_desc[que].rx_using ^= 1;
1484                                 rx_page = atl1e_get_rx_page(adapter, que);
1485                         }
1486                         write_offset = *(rx_page->write_offset_addr);
1487                 } while (rx_page->read_offset < write_offset);
1488         }
1489
1490         return;
1491
1492 fatal_err:
1493         if (!test_bit(__AT_DOWN, &adapter->flags))
1494                 schedule_work(&adapter->reset_task);
1495 }
1496
1497 /*
1498  * atl1e_clean - NAPI Rx polling callback
1499  * @adapter: board private structure
1500  */
1501 static int atl1e_clean(struct napi_struct *napi, int budget)
1502 {
1503         struct atl1e_adapter *adapter =
1504                         container_of(napi, struct atl1e_adapter, napi);
1505         struct net_device *netdev  = adapter->netdev;
1506         struct pci_dev    *pdev    = adapter->pdev;
1507         u32 imr_data;
1508         int work_done = 0;
1509
1510         /* Keep link state information with original netdev */
1511         if (!netif_carrier_ok(adapter->netdev))
1512                 goto quit_polling;
1513
1514         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1515
1516         /* If no Tx and not enough Rx work done, exit the polling mode */
1517         if (work_done < budget) {
1518 quit_polling:
1519                 netif_rx_complete(netdev, napi);
1520                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1521                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1522                 /* test debug */
1523                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1524                         atomic_dec(&adapter->irq_sem);
1525                         dev_err(&pdev->dev,
1526                                 "atl1e_clean is called when AT_DOWN\n");
1527                 }
1528                 /* reenable RX intr */
1529                 /*atl1e_irq_enable(adapter); */
1530
1531         }
1532         return work_done;
1533 }
1534
1535 #ifdef CONFIG_NET_POLL_CONTROLLER
1536
1537 /*
1538  * Polling 'interrupt' - used by things like netconsole to send skbs
1539  * without having to re-enable interrupts. It's not called while
1540  * the interrupt routine is executing.
1541  */
1542 static void atl1e_netpoll(struct net_device *netdev)
1543 {
1544         struct atl1e_adapter *adapter = netdev_priv(netdev);
1545
1546         disable_irq(adapter->pdev->irq);
1547         atl1e_intr(adapter->pdev->irq, netdev);
1548         enable_irq(adapter->pdev->irq);
1549 }
1550 #endif
1551
1552 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1553 {
1554         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1555         u16 next_to_use = 0;
1556         u16 next_to_clean = 0;
1557
1558         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1559         next_to_use   = tx_ring->next_to_use;
1560
1561         return (u16)(next_to_clean > next_to_use) ?
1562                 (next_to_clean - next_to_use - 1) :
1563                 (tx_ring->count + next_to_clean - next_to_use - 1);
1564 }
1565
1566 /*
1567  * get next usable tpd
1568  * Note: should call atl1e_tdp_avail to make sure
1569  * there is enough tpd to use
1570  */
1571 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1572 {
1573         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1574         u16 next_to_use = 0;
1575
1576         next_to_use = tx_ring->next_to_use;
1577         if (++tx_ring->next_to_use == tx_ring->count)
1578                 tx_ring->next_to_use = 0;
1579
1580         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1581         return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use];
1582 }
1583
1584 static struct atl1e_tx_buffer *
1585 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1586 {
1587         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1588
1589         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1590 }
1591
1592 /* Calculate the transmit packet descript needed*/
1593 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1594 {
1595         int i = 0;
1596         u16 tpd_req = 1;
1597         u16 fg_size = 0;
1598         u16 proto_hdr_len = 0;
1599
1600         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1601                 fg_size = skb_shinfo(skb)->frags[i].size;
1602                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1603         }
1604
1605         if (skb_is_gso(skb)) {
1606                 if (skb->protocol == ntohs(ETH_P_IP) ||
1607                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1608                         proto_hdr_len = skb_transport_offset(skb) +
1609                                         tcp_hdrlen(skb);
1610                         if (proto_hdr_len < skb_headlen(skb)) {
1611                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1612                                            MAX_TX_BUF_LEN - 1) >>
1613                                            MAX_TX_BUF_SHIFT);
1614                         }
1615                 }
1616
1617         }
1618         return tpd_req;
1619 }
1620
1621 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1622                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1623 {
1624         struct pci_dev *pdev = adapter->pdev;
1625         u8 hdr_len;
1626         u32 real_len;
1627         unsigned short offload_type;
1628         int err;
1629
1630         if (skb_is_gso(skb)) {
1631                 if (skb_header_cloned(skb)) {
1632                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1633                         if (unlikely(err))
1634                                 return -1;
1635                 }
1636                 offload_type = skb_shinfo(skb)->gso_type;
1637
1638                 if (offload_type & SKB_GSO_TCPV4) {
1639                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1640                                         + ntohs(ip_hdr(skb)->tot_len));
1641
1642                         if (real_len < skb->len)
1643                                 pskb_trim(skb, real_len);
1644
1645                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1646                         if (unlikely(skb->len == hdr_len)) {
1647                                 /* only xsum need */
1648                                 dev_warn(&pdev->dev,
1649                                       "IPV4 tso with zero data??\n");
1650                                 goto check_sum;
1651                         } else {
1652                                 ip_hdr(skb)->check = 0;
1653                                 ip_hdr(skb)->tot_len = 0;
1654                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1655                                                         ip_hdr(skb)->saddr,
1656                                                         ip_hdr(skb)->daddr,
1657                                                         0, IPPROTO_TCP, 0);
1658                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1659                                         TDP_V4_IPHL_MASK) <<
1660                                         TPD_V4_IPHL_SHIFT;
1661                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1662                                         TPD_TCPHDRLEN_MASK) <<
1663                                         TPD_TCPHDRLEN_SHIFT;
1664                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1665                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1666                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1667                         }
1668                         return 0;
1669                 }
1670
1671                 if (offload_type & SKB_GSO_TCPV6) {
1672                         real_len = (((unsigned char *)ipv6_hdr(skb) - skb->data)
1673                                         + ntohs(ipv6_hdr(skb)->payload_len));
1674                         if (real_len < skb->len)
1675                                 pskb_trim(skb, real_len);
1676
1677                         /* check payload == 0 byte ? */
1678                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1679                         if (unlikely(skb->len == hdr_len)) {
1680                                 /* only xsum need */
1681                                 dev_warn(&pdev->dev,
1682                                         "IPV6 tso with zero data??\n");
1683                                 goto check_sum;
1684                         } else {
1685                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1686                                                 &ipv6_hdr(skb)->saddr,
1687                                                 &ipv6_hdr(skb)->daddr,
1688                                                 0, IPPROTO_TCP, 0);
1689                                 tpd->word3 |= 1 << TPD_IP_VERSION_SHIFT;
1690                                 hdr_len >>= 1;
1691                                 tpd->word3 |= (hdr_len & TPD_V6_IPHLLO_MASK) <<
1692                                         TPD_V6_IPHLLO_SHIFT;
1693                                 tpd->word3 |= ((hdr_len >> 3) &
1694                                         TPD_V6_IPHLHI_MASK) <<
1695                                         TPD_V6_IPHLHI_SHIFT;
1696                                 tpd->word3 |= (tcp_hdrlen(skb) >> 2 &
1697                                         TPD_TCPHDRLEN_MASK) <<
1698                                         TPD_TCPHDRLEN_SHIFT;
1699                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1700                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1701                                         tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1702                         }
1703                 }
1704                 return 0;
1705         }
1706
1707 check_sum:
1708         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1709                 u8 css, cso;
1710
1711                 cso = skb_transport_offset(skb);
1712                 if (unlikely(cso & 0x1)) {
1713                         dev_err(&adapter->pdev->dev,
1714                            "pay load offset should not ant event number\n");
1715                         return -1;
1716                 } else {
1717                         css = cso + skb->csum_offset;
1718                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1719                                         TPD_PLOADOFFSET_SHIFT;
1720                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1721                                         TPD_CCSUMOFFSET_SHIFT;
1722                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1723                 }
1724         }
1725
1726         return 0;
1727 }
1728
1729 static void atl1e_tx_map(struct atl1e_adapter *adapter,
1730                       struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1731 {
1732         struct atl1e_tpd_desc *use_tpd = NULL;
1733         struct atl1e_tx_buffer *tx_buffer = NULL;
1734         u16 buf_len = skb->len - skb->data_len;
1735         u16 map_len = 0;
1736         u16 mapped_len = 0;
1737         u16 hdr_len = 0;
1738         u16 nr_frags;
1739         u16 f;
1740         int segment;
1741
1742         nr_frags = skb_shinfo(skb)->nr_frags;
1743         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1744         if (segment) {
1745                 /* TSO */
1746                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1747                 use_tpd = tpd;
1748
1749                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1750                 tx_buffer->length = map_len;
1751                 tx_buffer->dma = pci_map_single(adapter->pdev,
1752                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1753                 mapped_len += map_len;
1754                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1755                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1756                         ((cpu_to_le32(tx_buffer->length) &
1757                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1758         }
1759
1760         while (mapped_len < buf_len) {
1761                 /* mapped_len == 0, means we should use the first tpd,
1762                    which is given by caller  */
1763                 if (mapped_len == 0) {
1764                         use_tpd = tpd;
1765                 } else {
1766                         use_tpd = atl1e_get_tpd(adapter);
1767                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1768                 }
1769                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1770                 tx_buffer->skb = NULL;
1771
1772                 tx_buffer->length = map_len =
1773                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1774                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1775                 tx_buffer->dma =
1776                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1777                                         map_len, PCI_DMA_TODEVICE);
1778                 mapped_len  += map_len;
1779                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1780                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1781                         ((cpu_to_le32(tx_buffer->length) &
1782                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1783         }
1784
1785         for (f = 0; f < nr_frags; f++) {
1786                 struct skb_frag_struct *frag;
1787                 u16 i;
1788                 u16 seg_num;
1789
1790                 frag = &skb_shinfo(skb)->frags[f];
1791                 buf_len = frag->size;
1792
1793                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1794                 for (i = 0; i < seg_num; i++) {
1795                         use_tpd = atl1e_get_tpd(adapter);
1796                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1797
1798                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1799                         if (tx_buffer->skb)
1800                                 BUG();
1801
1802                         tx_buffer->skb = NULL;
1803                         tx_buffer->length =
1804                                 (buf_len > MAX_TX_BUF_LEN) ?
1805                                 MAX_TX_BUF_LEN : buf_len;
1806                         buf_len -= tx_buffer->length;
1807
1808                         tx_buffer->dma =
1809                                 pci_map_page(adapter->pdev, frag->page,
1810                                                 frag->page_offset +
1811                                                 (i * MAX_TX_BUF_LEN),
1812                                                 tx_buffer->length,
1813                                                 PCI_DMA_TODEVICE);
1814                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1815                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1816                                         ((cpu_to_le32(tx_buffer->length) &
1817                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1818                 }
1819         }
1820
1821         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1822                 /* note this one is a tcp header */
1823                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1824         /* The last tpd */
1825
1826         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1827         /* The last buffer info contain the skb address,
1828            so it will be free after unmap */
1829         tx_buffer->skb = skb;
1830 }
1831
1832 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1833                            struct atl1e_tpd_desc *tpd)
1834 {
1835         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1836         /* Force memory writes to complete before letting h/w
1837          * know there are new descriptors to fetch.  (Only
1838          * applicable for weak-ordered memory model archs,
1839          * such as IA-64). */
1840         wmb();
1841         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1842 }
1843
1844 static int atl1e_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1845 {
1846         struct atl1e_adapter *adapter = netdev_priv(netdev);
1847         unsigned long flags;
1848         u16 tpd_req = 1;
1849         struct atl1e_tpd_desc *tpd;
1850
1851         if (test_bit(__AT_DOWN, &adapter->flags)) {
1852                 dev_kfree_skb_any(skb);
1853                 return NETDEV_TX_OK;
1854         }
1855
1856         if (unlikely(skb->len <= 0)) {
1857                 dev_kfree_skb_any(skb);
1858                 return NETDEV_TX_OK;
1859         }
1860         tpd_req = atl1e_cal_tdp_req(skb);
1861         if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1862                 return NETDEV_TX_LOCKED;
1863
1864         if (atl1e_tpd_avail(adapter) < tpd_req) {
1865                 /* no enough descriptor, just stop queue */
1866                 netif_stop_queue(netdev);
1867                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1868                 return NETDEV_TX_BUSY;
1869         }
1870
1871         tpd = atl1e_get_tpd(adapter);
1872
1873         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
1874                 u16 vlan_tag = vlan_tx_tag_get(skb);
1875                 u16 atl1e_vlan_tag;
1876
1877                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1878                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1879                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1880                                 TPD_VLAN_SHIFT;
1881         }
1882
1883         if (skb->protocol == ntohs(ETH_P_8021Q))
1884                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1885
1886         if (skb_network_offset(skb) != ETH_HLEN)
1887                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1888
1889         /* do TSO and check sum */
1890         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1891                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1892                 dev_kfree_skb_any(skb);
1893                 return NETDEV_TX_OK;
1894         }
1895
1896         atl1e_tx_map(adapter, skb, tpd);
1897         atl1e_tx_queue(adapter, tpd_req, tpd);
1898
1899         netdev->trans_start = jiffies;
1900         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1901         return NETDEV_TX_OK;
1902 }
1903
1904 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1905 {
1906         struct net_device *netdev = adapter->netdev;
1907
1908         free_irq(adapter->pdev->irq, netdev);
1909
1910         if (adapter->have_msi)
1911                 pci_disable_msi(adapter->pdev);
1912 }
1913
1914 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1915 {
1916         struct pci_dev    *pdev   = adapter->pdev;
1917         struct net_device *netdev = adapter->netdev;
1918         int flags = 0;
1919         int err = 0;
1920
1921         adapter->have_msi = true;
1922         err = pci_enable_msi(adapter->pdev);
1923         if (err) {
1924                 dev_dbg(&pdev->dev,
1925                         "Unable to allocate MSI interrupt Error: %d\n", err);
1926                 adapter->have_msi = false;
1927         } else
1928                 netdev->irq = pdev->irq;
1929
1930
1931         if (!adapter->have_msi)
1932                 flags |= IRQF_SHARED;
1933         err = request_irq(adapter->pdev->irq, &atl1e_intr, flags,
1934                         netdev->name, netdev);
1935         if (err) {
1936                 dev_dbg(&pdev->dev,
1937                         "Unable to allocate interrupt Error: %d\n", err);
1938                 if (adapter->have_msi)
1939                         pci_disable_msi(adapter->pdev);
1940                 return err;
1941         }
1942         dev_dbg(&pdev->dev, "atl1e_request_irq OK\n");
1943         return err;
1944 }
1945
1946 int atl1e_up(struct atl1e_adapter *adapter)
1947 {
1948         struct net_device *netdev = adapter->netdev;
1949         int err = 0;
1950         u32 val;
1951
1952         /* hardware has been reset, we need to reload some things */
1953         err = atl1e_init_hw(&adapter->hw);
1954         if (err) {
1955                 err = -EIO;
1956                 return err;
1957         }
1958         atl1e_init_ring_ptrs(adapter);
1959         atl1e_set_multi(netdev);
1960         atl1e_restore_vlan(adapter);
1961
1962         if (atl1e_configure(adapter)) {
1963                 err = -EIO;
1964                 goto err_up;
1965         }
1966
1967         clear_bit(__AT_DOWN, &adapter->flags);
1968         napi_enable(&adapter->napi);
1969         atl1e_irq_enable(adapter);
1970         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1971         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1972                       val | MASTER_CTRL_MANUAL_INT);
1973
1974 err_up:
1975         return err;
1976 }
1977
1978 void atl1e_down(struct atl1e_adapter *adapter)
1979 {
1980         struct net_device *netdev = adapter->netdev;
1981
1982         /* signal that we're down so the interrupt handler does not
1983          * reschedule our watchdog timer */
1984         set_bit(__AT_DOWN, &adapter->flags);
1985
1986 #ifdef NETIF_F_LLTX
1987         netif_stop_queue(netdev);
1988 #else
1989         netif_tx_disable(netdev);
1990 #endif
1991
1992         /* reset MAC to disable all RX/TX */
1993         atl1e_reset_hw(&adapter->hw);
1994         msleep(1);
1995
1996         napi_disable(&adapter->napi);
1997         atl1e_del_timer(adapter);
1998         atl1e_irq_disable(adapter);
1999
2000         netif_carrier_off(netdev);
2001         adapter->link_speed = SPEED_0;
2002         adapter->link_duplex = -1;
2003         atl1e_clean_tx_ring(adapter);
2004         atl1e_clean_rx_ring(adapter);
2005 }
2006
2007 /*
2008  * atl1e_open - Called when a network interface is made active
2009  * @netdev: network interface device structure
2010  *
2011  * Returns 0 on success, negative value on failure
2012  *
2013  * The open entry point is called when a network interface is made
2014  * active by the system (IFF_UP).  At this point all resources needed
2015  * for transmit and receive operations are allocated, the interrupt
2016  * handler is registered with the OS, the watchdog timer is started,
2017  * and the stack is notified that the interface is ready.
2018  */
2019 static int atl1e_open(struct net_device *netdev)
2020 {
2021         struct atl1e_adapter *adapter = netdev_priv(netdev);
2022         int err;
2023
2024         /* disallow open during test */
2025         if (test_bit(__AT_TESTING, &adapter->flags))
2026                 return -EBUSY;
2027
2028         /* allocate rx/tx dma buffer & descriptors */
2029         atl1e_init_ring_resources(adapter);
2030         err = atl1e_setup_ring_resources(adapter);
2031         if (unlikely(err))
2032                 return err;
2033
2034         err = atl1e_request_irq(adapter);
2035         if (unlikely(err))
2036                 goto err_req_irq;
2037
2038         err = atl1e_up(adapter);
2039         if (unlikely(err))
2040                 goto err_up;
2041
2042         return 0;
2043
2044 err_up:
2045         atl1e_free_irq(adapter);
2046 err_req_irq:
2047         atl1e_free_ring_resources(adapter);
2048         atl1e_reset_hw(&adapter->hw);
2049
2050         return err;
2051 }
2052
2053 /*
2054  * atl1e_close - Disables a network interface
2055  * @netdev: network interface device structure
2056  *
2057  * Returns 0, this is not allowed to fail
2058  *
2059  * The close entry point is called when an interface is de-activated
2060  * by the OS.  The hardware is still under the drivers control, but
2061  * needs to be disabled.  A global MAC reset is issued to stop the
2062  * hardware, and all transmit and receive resources are freed.
2063  */
2064 static int atl1e_close(struct net_device *netdev)
2065 {
2066         struct atl1e_adapter *adapter = netdev_priv(netdev);
2067
2068         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2069         atl1e_down(adapter);
2070         atl1e_free_irq(adapter);
2071         atl1e_free_ring_resources(adapter);
2072
2073         return 0;
2074 }
2075
2076 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2077 {
2078         struct net_device *netdev = pci_get_drvdata(pdev);
2079         struct atl1e_adapter *adapter = netdev_priv(netdev);
2080         struct atl1e_hw *hw = &adapter->hw;
2081         u32 ctrl = 0;
2082         u32 mac_ctrl_data = 0;
2083         u32 wol_ctrl_data = 0;
2084         u16 mii_advertise_data = 0;
2085         u16 mii_bmsr_data = 0;
2086         u16 mii_intr_status_data = 0;
2087         u32 wufc = adapter->wol;
2088         u32 i;
2089 #ifdef CONFIG_PM
2090         int retval = 0;
2091 #endif
2092
2093         if (netif_running(netdev)) {
2094                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2095                 atl1e_down(adapter);
2096         }
2097         netif_device_detach(netdev);
2098
2099 #ifdef CONFIG_PM
2100         retval = pci_save_state(pdev);
2101         if (retval)
2102                 return retval;
2103 #endif
2104
2105         if (wufc) {
2106                 /* get link status */
2107                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2108                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2109
2110                 mii_advertise_data = MII_AR_10T_HD_CAPS;
2111
2112                 if ((atl1e_write_phy_reg(hw, MII_AT001_CR, 0) != 0) ||
2113                     (atl1e_write_phy_reg(hw,
2114                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2115                     (atl1e_phy_commit(hw)) != 0) {
2116                         dev_dbg(&pdev->dev, "set phy register failed\n");
2117                         goto wol_dis;
2118                 }
2119
2120                 hw->phy_configured = false; /* re-init PHY when resume */
2121
2122                 /* turn on magic packet wol */
2123                 if (wufc & AT_WUFC_MAG)
2124                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2125
2126                 if (wufc & AT_WUFC_LNKC) {
2127                 /* if orignal link status is link, just wait for retrive link */
2128                         if (mii_bmsr_data & BMSR_LSTATUS) {
2129                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2130                                         msleep(100);
2131                                         atl1e_read_phy_reg(hw, MII_BMSR,
2132                                                         (u16 *)&mii_bmsr_data);
2133                                         if (mii_bmsr_data & BMSR_LSTATUS)
2134                                                 break;
2135                                 }
2136
2137                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2138                                         dev_dbg(&pdev->dev,
2139                                                 "%s: Link may change"
2140                                                 "when suspend\n",
2141                                                 atl1e_driver_name);
2142                         }
2143                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2144                         /* only link up can wake up */
2145                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2146                                 dev_dbg(&pdev->dev, "%s: read write phy "
2147                                                   "register failed.\n",
2148                                                   atl1e_driver_name);
2149                                 goto wol_dis;
2150                         }
2151                 }
2152                 /* clear phy interrupt */
2153                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2154                 /* Config MAC Ctrl register */
2155                 mac_ctrl_data = MAC_CTRL_RX_EN;
2156                 /* set to 10/100M halt duplex */
2157                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2158                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2159                                  MAC_CTRL_PRMLEN_MASK) <<
2160                                  MAC_CTRL_PRMLEN_SHIFT);
2161
2162                 if (adapter->vlgrp)
2163                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2164
2165                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2166                 if (wufc & AT_WUFC_MAG)
2167                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2168
2169                 dev_dbg(&pdev->dev,
2170                         "%s: suspend MAC=0x%x\n",
2171                         atl1e_driver_name, mac_ctrl_data);
2172
2173                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2174                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2175                 /* pcie patch */
2176                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2177                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2178                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2179                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2180                 goto suspend_exit;
2181         }
2182 wol_dis:
2183
2184         /* WOL disabled */
2185         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2186
2187         /* pcie patch */
2188         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2189         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2190         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2191
2192         atl1e_force_ps(hw);
2193         hw->phy_configured = false; /* re-init PHY when resume */
2194
2195         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2196
2197 suspend_exit:
2198
2199         if (netif_running(netdev))
2200                 atl1e_free_irq(adapter);
2201
2202         pci_disable_device(pdev);
2203
2204         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2205
2206         return 0;
2207 }
2208
2209 #ifdef CONFIG_PM
2210 static int atl1e_resume(struct pci_dev *pdev)
2211 {
2212         struct net_device *netdev = pci_get_drvdata(pdev);
2213         struct atl1e_adapter *adapter = netdev_priv(netdev);
2214         u32 err;
2215
2216         pci_set_power_state(pdev, PCI_D0);
2217         pci_restore_state(pdev);
2218
2219         err = pci_enable_device(pdev);
2220         if (err) {
2221                 dev_err(&pdev->dev, "ATL1e: Cannot enable PCI"
2222                                 " device from suspend\n");
2223                 return err;
2224         }
2225
2226         pci_set_master(pdev);
2227
2228         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2229
2230         pci_enable_wake(pdev, PCI_D3hot, 0);
2231         pci_enable_wake(pdev, PCI_D3cold, 0);
2232
2233         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2234
2235         if (netif_running(netdev)) {
2236                 err = atl1e_request_irq(adapter);
2237                 if (err)
2238                         return err;
2239         }
2240
2241         atl1e_reset_hw(&adapter->hw);
2242
2243         if (netif_running(netdev))
2244                 atl1e_up(adapter);
2245
2246         netif_device_attach(netdev);
2247
2248         return 0;
2249 }
2250 #endif
2251
2252 static void atl1e_shutdown(struct pci_dev *pdev)
2253 {
2254         atl1e_suspend(pdev, PMSG_SUSPEND);
2255 }
2256
2257 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2258 {
2259         SET_NETDEV_DEV(netdev, &pdev->dev);
2260         pci_set_drvdata(pdev, netdev);
2261
2262         netdev->irq  = pdev->irq;
2263         netdev->open = &atl1e_open;
2264         netdev->stop = &atl1e_close;
2265         netdev->hard_start_xmit = &atl1e_xmit_frame;
2266         netdev->get_stats = &atl1e_get_stats;
2267         netdev->set_multicast_list = &atl1e_set_multi;
2268         netdev->set_mac_address = &atl1e_set_mac_addr;
2269         netdev->change_mtu = &atl1e_change_mtu;
2270         netdev->do_ioctl = &atl1e_ioctl;
2271         netdev->tx_timeout = &atl1e_tx_timeout;
2272         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2273         netdev->vlan_rx_register = atl1e_vlan_rx_register;
2274 #ifdef CONFIG_NET_POLL_CONTROLLER
2275         netdev->poll_controller = atl1e_netpoll;
2276 #endif
2277         atl1e_set_ethtool_ops(netdev);
2278
2279         netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM |
2280                 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2281         netdev->features |= NETIF_F_LLTX;
2282         netdev->features |= NETIF_F_TSO;
2283         netdev->features |= NETIF_F_TSO6;
2284
2285         return 0;
2286 }
2287
2288 /*
2289  * atl1e_probe - Device Initialization Routine
2290  * @pdev: PCI device information struct
2291  * @ent: entry in atl1e_pci_tbl
2292  *
2293  * Returns 0 on success, negative on failure
2294  *
2295  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2296  * The OS initialization, configuring of the adapter private structure,
2297  * and a hardware reset occur.
2298  */
2299 static int __devinit atl1e_probe(struct pci_dev *pdev,
2300                                  const struct pci_device_id *ent)
2301 {
2302         struct net_device *netdev;
2303         struct atl1e_adapter *adapter = NULL;
2304         static int cards_found;
2305
2306         int err = 0;
2307
2308         err = pci_enable_device(pdev);
2309         if (err) {
2310                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2311                 return err;
2312         }
2313
2314         /*
2315          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2316          * shared register for the high 32 bits, so only a single, aligned,
2317          * 4 GB physical address range can be used at a time.
2318          *
2319          * Supporting 64-bit DMA on this hardware is more trouble than it's
2320          * worth.  It is far easier to limit to 32-bit DMA than update
2321          * various kernel subsystems to support the mechanics required by a
2322          * fixed-high-32-bit system.
2323          */
2324         if ((pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) ||
2325             (pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) != 0)) {
2326                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2327                 goto err_dma;
2328         }
2329
2330         err = pci_request_regions(pdev, atl1e_driver_name);
2331         if (err) {
2332                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2333                 goto err_pci_reg;
2334         }
2335
2336         pci_set_master(pdev);
2337
2338         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2339         if (netdev == NULL) {
2340                 err = -ENOMEM;
2341                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2342                 goto err_alloc_etherdev;
2343         }
2344
2345         err = atl1e_init_netdev(netdev, pdev);
2346         if (err) {
2347                 dev_err(&pdev->dev, "init netdevice failed\n");
2348                 goto err_init_netdev;
2349         }
2350         adapter = netdev_priv(netdev);
2351         adapter->bd_number = cards_found;
2352         adapter->netdev = netdev;
2353         adapter->pdev = pdev;
2354         adapter->hw.adapter = adapter;
2355         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2356         if (!adapter->hw.hw_addr) {
2357                 err = -EIO;
2358                 dev_err(&pdev->dev, "cannot map device registers\n");
2359                 goto err_ioremap;
2360         }
2361         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2362
2363         /* init mii data */
2364         adapter->mii.dev = netdev;
2365         adapter->mii.mdio_read  = atl1e_mdio_read;
2366         adapter->mii.mdio_write = atl1e_mdio_write;
2367         adapter->mii.phy_id_mask = 0x1f;
2368         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2369
2370         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2371
2372         init_timer(&adapter->phy_config_timer);
2373         adapter->phy_config_timer.function = &atl1e_phy_config;
2374         adapter->phy_config_timer.data = (unsigned long) adapter;
2375
2376         /* get user settings */
2377         atl1e_check_options(adapter);
2378         /*
2379          * Mark all PCI regions associated with PCI device
2380          * pdev as being reserved by owner atl1e_driver_name
2381          * Enables bus-mastering on the device and calls
2382          * pcibios_set_master to do the needed arch specific settings
2383          */
2384         atl1e_setup_pcicmd(pdev);
2385         /* setup the private structure */
2386         err = atl1e_sw_init(adapter);
2387         if (err) {
2388                 dev_err(&pdev->dev, "net device private data init failed\n");
2389                 goto err_sw_init;
2390         }
2391
2392         /* Init GPHY as early as possible due to power saving issue  */
2393         spin_lock(&adapter->mdio_lock);
2394         atl1e_phy_init(&adapter->hw);
2395         spin_unlock(&adapter->mdio_lock);
2396         /* reset the controller to
2397          * put the device in a known good starting state */
2398         err = atl1e_reset_hw(&adapter->hw);
2399         if (err) {
2400                 err = -EIO;
2401                 goto err_reset;
2402         }
2403
2404         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2405                 err = -EIO;
2406                 dev_err(&pdev->dev, "get mac address failed\n");
2407                 goto err_eeprom;
2408         }
2409
2410         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2411         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2412         dev_dbg(&pdev->dev, "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2413                         adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2414                         adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2415                         adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2416
2417         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2418         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2419         err = register_netdev(netdev);
2420         if (err) {
2421                 dev_err(&pdev->dev, "register netdevice failed\n");
2422                 goto err_register;
2423         }
2424
2425         /* assume we have no link for now */
2426         netif_stop_queue(netdev);
2427         netif_carrier_off(netdev);
2428
2429         cards_found++;
2430
2431         return 0;
2432
2433 err_reset:
2434 err_register:
2435 err_sw_init:
2436 err_eeprom:
2437         iounmap(adapter->hw.hw_addr);
2438 err_init_netdev:
2439 err_ioremap:
2440         free_netdev(netdev);
2441 err_alloc_etherdev:
2442         pci_release_regions(pdev);
2443 err_pci_reg:
2444 err_dma:
2445         pci_disable_device(pdev);
2446         return err;
2447 }
2448
2449 /*
2450  * atl1e_remove - Device Removal Routine
2451  * @pdev: PCI device information struct
2452  *
2453  * atl1e_remove is called by the PCI subsystem to alert the driver
2454  * that it should release a PCI device.  The could be caused by a
2455  * Hot-Plug event, or because the driver is going to be removed from
2456  * memory.
2457  */
2458 static void __devexit atl1e_remove(struct pci_dev *pdev)
2459 {
2460         struct net_device *netdev = pci_get_drvdata(pdev);
2461         struct atl1e_adapter *adapter = netdev_priv(netdev);
2462
2463         /*
2464          * flush_scheduled work may reschedule our watchdog task, so
2465          * explicitly disable watchdog tasks from being rescheduled
2466          */
2467         set_bit(__AT_DOWN, &adapter->flags);
2468
2469         atl1e_del_timer(adapter);
2470         atl1e_cancel_work(adapter);
2471
2472         unregister_netdev(netdev);
2473         atl1e_free_ring_resources(adapter);
2474         atl1e_force_ps(&adapter->hw);
2475         iounmap(adapter->hw.hw_addr);
2476         pci_release_regions(pdev);
2477         free_netdev(netdev);
2478         pci_disable_device(pdev);
2479 }
2480
2481 /*
2482  * atl1e_io_error_detected - called when PCI error is detected
2483  * @pdev: Pointer to PCI device
2484  * @state: The current pci connection state
2485  *
2486  * This function is called after a PCI bus error affecting
2487  * this device has been detected.
2488  */
2489 static pci_ers_result_t
2490 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2491 {
2492         struct net_device *netdev = pci_get_drvdata(pdev);
2493         struct atl1e_adapter *adapter = netdev->priv;
2494
2495         netif_device_detach(netdev);
2496
2497         if (netif_running(netdev))
2498                 atl1e_down(adapter);
2499
2500         pci_disable_device(pdev);
2501
2502         /* Request a slot slot reset. */
2503         return PCI_ERS_RESULT_NEED_RESET;
2504 }
2505
2506 /*
2507  * atl1e_io_slot_reset - called after the pci bus has been reset.
2508  * @pdev: Pointer to PCI device
2509  *
2510  * Restart the card from scratch, as if from a cold-boot. Implementation
2511  * resembles the first-half of the e1000_resume routine.
2512  */
2513 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2514 {
2515         struct net_device *netdev = pci_get_drvdata(pdev);
2516         struct atl1e_adapter *adapter = netdev->priv;
2517
2518         if (pci_enable_device(pdev)) {
2519                 dev_err(&pdev->dev,
2520                        "ATL1e: Cannot re-enable PCI device after reset.\n");
2521                 return PCI_ERS_RESULT_DISCONNECT;
2522         }
2523         pci_set_master(pdev);
2524
2525         pci_enable_wake(pdev, PCI_D3hot, 0);
2526         pci_enable_wake(pdev, PCI_D3cold, 0);
2527
2528         atl1e_reset_hw(&adapter->hw);
2529
2530         return PCI_ERS_RESULT_RECOVERED;
2531 }
2532
2533 /*
2534  * atl1e_io_resume - called when traffic can start flowing again.
2535  * @pdev: Pointer to PCI device
2536  *
2537  * This callback is called when the error recovery driver tells us that
2538  * its OK to resume normal operation. Implementation resembles the
2539  * second-half of the atl1e_resume routine.
2540  */
2541 static void atl1e_io_resume(struct pci_dev *pdev)
2542 {
2543         struct net_device *netdev = pci_get_drvdata(pdev);
2544         struct atl1e_adapter *adapter = netdev->priv;
2545
2546         if (netif_running(netdev)) {
2547                 if (atl1e_up(adapter)) {
2548                         dev_err(&pdev->dev,
2549                           "ATL1e: can't bring device back up after reset\n");
2550                         return;
2551                 }
2552         }
2553
2554         netif_device_attach(netdev);
2555 }
2556
2557 static struct pci_error_handlers atl1e_err_handler = {
2558         .error_detected = atl1e_io_error_detected,
2559         .slot_reset = atl1e_io_slot_reset,
2560         .resume = atl1e_io_resume,
2561 };
2562
2563 static struct pci_driver atl1e_driver = {
2564         .name     = atl1e_driver_name,
2565         .id_table = atl1e_pci_tbl,
2566         .probe    = atl1e_probe,
2567         .remove   = __devexit_p(atl1e_remove),
2568         /* Power Managment Hooks */
2569 #ifdef CONFIG_PM
2570         .suspend  = atl1e_suspend,
2571         .resume   = atl1e_resume,
2572 #endif
2573         .shutdown = atl1e_shutdown,
2574         .err_handler = &atl1e_err_handler
2575 };
2576
2577 /*
2578  * atl1e_init_module - Driver Registration Routine
2579  *
2580  * atl1e_init_module is the first routine called when the driver is
2581  * loaded. All it does is register with the PCI subsystem.
2582  */
2583 static int __init atl1e_init_module(void)
2584 {
2585         return pci_register_driver(&atl1e_driver);
2586 }
2587
2588 /*
2589  * atl1e_exit_module - Driver Exit Cleanup Routine
2590  *
2591  * atl1e_exit_module is called just before the driver is removed
2592  * from memory.
2593  */
2594 static void __exit atl1e_exit_module(void)
2595 {
2596         pci_unregister_driver(&atl1e_driver);
2597 }
2598
2599 module_init(atl1e_init_module);
2600 module_exit(atl1e_exit_module);