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         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  45
  46 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(DRV_VERSION);
  50
  51 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  52
  53 static const u16
  54 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  55 {
  56         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  57         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  58         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  59         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  60 };
  61
  62 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  63 {
  64         REG_RXF0_BASE_ADDR_HI,
  65         REG_RXF1_BASE_ADDR_HI,
  66         REG_RXF2_BASE_ADDR_HI,
  67         REG_RXF3_BASE_ADDR_HI
  68 };
  69
  70 static const u16
  71 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  72 {
  73         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  74         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  75         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  76         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  77 };
  78
  79 static const u16
  80 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  81 {
  82         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  83         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  84         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  85         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  86 };
  87
  88 static const u16 atl1e_pay_load_size[] = {
  89         128, 256, 512, 1024, 2048, 4096,
  90 };
  91
  92 /*
  93  * atl1e_irq_enable - Enable default interrupt generation settings
  94  * @adapter: board private structure
  95  */
  96 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  97 {
  98         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  99                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 100                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
 101                 AT_WRITE_FLUSH(&adapter->hw);
 102         }
 103 }
 104
 105 /*
 106  * atl1e_irq_disable - Mask off interrupt generation on the NIC
 107  * @adapter: board private structure
 108  */
 109 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
 110 {
 111         atomic_inc(&adapter->irq_sem);
 112         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 113         AT_WRITE_FLUSH(&adapter->hw);
 114         synchronize_irq(adapter->pdev->irq);
 115 }
 116
 117 /*
 118  * atl1e_irq_reset - reset interrupt confiure on the NIC
 119  * @adapter: board private structure
 120  */
 121 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 122 {
 123         atomic_set(&adapter->irq_sem, 0);
 124         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 125         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 126         AT_WRITE_FLUSH(&adapter->hw);
 127 }
 128
 129 /*
 130  * atl1e_phy_config - Timer Call-back
 131  * @data: pointer to netdev cast into an unsigned long
 132  */
 133 static void atl1e_phy_config(unsigned long data)
 134 {
 135         struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
 136         struct atl1e_hw *hw = &adapter->hw;
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&adapter->mdio_lock, flags);
 140         atl1e_restart_autoneg(hw);
 141         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 142 }
 143
 144 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 145 {
 146
 147         WARN_ON(in_interrupt());
 148         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 149                 msleep(1);
 150         atl1e_down(adapter);
 151         atl1e_up(adapter);
 152         clear_bit(__AT_RESETTING, &adapter->flags);
 153 }
 154
 155 static void atl1e_reset_task(struct work_struct *work)
 156 {
 157         struct atl1e_adapter *adapter;
 158         adapter = container_of(work, struct atl1e_adapter, reset_task);
 159
 160         atl1e_reinit_locked(adapter);
 161 }
 162
 163 static int atl1e_check_link(struct atl1e_adapter *adapter)
 164 {
 165         struct atl1e_hw *hw = &adapter->hw;
 166         struct net_device *netdev = adapter->netdev;
 167         struct pci_dev    *pdev   = adapter->pdev;
 168         int err = 0;
 169         u16 speed, duplex, phy_data;
 170
 171         /* MII_BMSR must read twise */
 172         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 173         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 174         if ((phy_data & BMSR_LSTATUS) == 0) {
 175                 /* link down */
 176                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 177                         u32 value;
 178                         /* disable rx */
 179                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 180                         value &= ~MAC_CTRL_RX_EN;
 181                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 182                         adapter->link_speed = SPEED_0;
 183                         netif_carrier_off(netdev);
 184                         netif_stop_queue(netdev);
 185                 }
 186         } else {
 187                 /* Link Up */
 188                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 189                 if (unlikely(err))
 190                         return err;
 191
 192                 /* link result is our setting */
 193                 if (adapter->link_speed != speed ||
 194                     adapter->link_duplex != duplex) {
 195                         adapter->link_speed  = speed;
 196                         adapter->link_duplex = duplex;
 197                         atl1e_setup_mac_ctrl(adapter);
 198                         dev_info(&pdev->dev,
 199                                 "%s: %s NIC Link is Up<%d Mbps %s>\n",
 200                                 atl1e_driver_name, netdev->name,
 201                                 adapter->link_speed,
 202                                 adapter->link_duplex == FULL_DUPLEX ?
 203                                 "Full Duplex" : "Half Duplex");
 204                 }
 205
 206                 if (!netif_carrier_ok(netdev)) {
 207                         /* Link down -> Up */
 208                         netif_carrier_on(netdev);
 209                         netif_wake_queue(netdev);
 210                 }
 211         }
 212         return 0;
 213 }
 214
 215 /*
 216  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 217  * @netdev: network interface device structure
 218  */
 219 static void atl1e_link_chg_task(struct work_struct *work)
 220 {
 221         struct atl1e_adapter *adapter;
 222         unsigned long flags;
 223
 224         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 225         spin_lock_irqsave(&adapter->mdio_lock, flags);
 226         atl1e_check_link(adapter);
 227         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 228 }
 229
 230 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 231 {
 232         struct net_device *netdev = adapter->netdev;
 233         struct pci_dev    *pdev   = adapter->pdev;
 234         u16 phy_data = 0;
 235         u16 link_up = 0;
 236
 237         spin_lock(&adapter->mdio_lock);
 238         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 239         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 240         spin_unlock(&adapter->mdio_lock);
 241         link_up = phy_data & BMSR_LSTATUS;
 242         /* notify upper layer link down ASAP */
 243         if (!link_up) {
 244                 if (netif_carrier_ok(netdev)) {
 245                         /* old link state: Up */
 246                         dev_info(&pdev->dev, "%s: %s NIC Link is Down\n",
 247                                         atl1e_driver_name, netdev->name);
 248                         adapter->link_speed = SPEED_0;
 249                         netif_stop_queue(netdev);
 250                 }
 251         }
 252         schedule_work(&adapter->link_chg_task);
 253 }
 254
 255 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 256 {
 257         del_timer_sync(&adapter->phy_config_timer);
 258 }
 259
 260 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 261 {
 262         cancel_work_sync(&adapter->reset_task);
 263         cancel_work_sync(&adapter->link_chg_task);
 264 }
 265
 266 /*
 267  * atl1e_tx_timeout - Respond to a Tx Hang
 268  * @netdev: network interface device structure
 269  */
 270 static void atl1e_tx_timeout(struct net_device *netdev)
 271 {
 272         struct atl1e_adapter *adapter = netdev_priv(netdev);
 273
 274         /* Do the reset outside of interrupt context */
 275         schedule_work(&adapter->reset_task);
 276 }
 277
 278 /*
 279  * atl1e_set_multi - Multicast and Promiscuous mode set
 280  * @netdev: network interface device structure
 281  *
 282  * The set_multi entry point is called whenever the multicast address
 283  * list or the network interface flags are updated.  This routine is
 284  * responsible for configuring the hardware for proper multicast,
 285  * promiscuous mode, and all-multi behavior.
 286  */
 287 static void atl1e_set_multi(struct net_device *netdev)
 288 {
 289         struct atl1e_adapter *adapter = netdev_priv(netdev);
 290         struct atl1e_hw *hw = &adapter->hw;
 291         struct dev_mc_list *mc_ptr;
 292         u32 mac_ctrl_data = 0;
 293         u32 hash_value;
 294
 295         /* Check for Promiscuous and All Multicast modes */
 296         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 297
 298         if (netdev->flags & IFF_PROMISC) {
 299                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 300         } else if (netdev->flags & IFF_ALLMULTI) {
 301                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 302                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 303         } else {
 304                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 305         }
 306
 307         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 308
 309         /* clear the old settings from the multicast hash table */
 310         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 311         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 312
 313         /* comoute mc addresses' hash value ,and put it into hash table */
 314         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 315                 hash_value = atl1e_hash_mc_addr(hw, mc_ptr->dmi_addr);
 316                 atl1e_hash_set(hw, hash_value);
 317         }
 318 }
 319
 320 static void atl1e_vlan_rx_register(struct net_device *netdev,
 321                                    struct vlan_group *grp)
 322 {
 323         struct atl1e_adapter *adapter = netdev_priv(netdev);
 324         struct pci_dev *pdev = adapter->pdev;
 325         u32 mac_ctrl_data = 0;
 326
 327         dev_dbg(&pdev->dev, "atl1e_vlan_rx_register\n");
 328
 329         atl1e_irq_disable(adapter);
 330
 331         adapter->vlgrp = grp;
 332         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 333
 334         if (grp) {
 335                 /* enable VLAN tag insert/strip */
 336                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 337         } else {
 338                 /* disable VLAN tag insert/strip */
 339                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 340         }
 341
 342         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 343         atl1e_irq_enable(adapter);
 344 }
 345
 346 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 347 {
 348         struct pci_dev *pdev = adapter->pdev;
 349
 350         dev_dbg(&pdev->dev, "atl1e_restore_vlan !");
 351         atl1e_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 352 }
 353 /*
 354  * atl1e_set_mac - Change the Ethernet Address of the NIC
 355  * @netdev: network interface device structure
 356  * @p: pointer to an address structure
 357  *
 358  * Returns 0 on success, negative on failure
 359  */
 360 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 361 {
 362         struct atl1e_adapter *adapter = netdev_priv(netdev);
 363         struct sockaddr *addr = p;
 364
 365         if (!is_valid_ether_addr(addr->sa_data))
 366                 return -EADDRNOTAVAIL;
 367
 368         if (netif_running(netdev))
 369                 return -EBUSY;
 370
 371         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 372         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 373
 374         atl1e_hw_set_mac_addr(&adapter->hw);
 375
 376         return 0;
 377 }
 378
 379 /*
 380  * atl1e_change_mtu - Change the Maximum Transfer Unit
 381  * @netdev: network interface device structure
 382  * @new_mtu: new value for maximum frame size
 383  *
 384  * Returns 0 on success, negative on failure
 385  */
 386 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 387 {
 388         struct atl1e_adapter *adapter = netdev_priv(netdev);
 389         int old_mtu   = netdev->mtu;
 390         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 391
 392         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 393                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 394                 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 395                 return -EINVAL;
 396         }
 397         /* set MTU */
 398         if (old_mtu != new_mtu && netif_running(netdev)) {
 399                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 400                         msleep(1);
 401                 netdev->mtu = new_mtu;
 402                 adapter->hw.max_frame_size = new_mtu;
 403                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 404                 atl1e_down(adapter);
 405                 atl1e_up(adapter);
 406                 clear_bit(__AT_RESETTING, &adapter->flags);
 407         }
 408         return 0;
 409 }
 410
 411 /*
 412  *  caller should hold mdio_lock
 413  */
 414 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 415 {
 416         struct atl1e_adapter *adapter = netdev_priv(netdev);
 417         u16 result;
 418
 419         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 420         return result;
 421 }
 422
 423 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 424                              int reg_num, int val)
 425 {
 426         struct atl1e_adapter *adapter = netdev_priv(netdev);
 427
 428         atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 429 }
 430
 431 /*
 432  * atl1e_mii_ioctl -
 433  * @netdev:
 434  * @ifreq:
 435  * @cmd:
 436  */
 437 static int atl1e_mii_ioctl(struct net_device *netdev,
 438                            struct ifreq *ifr, int cmd)
 439 {
 440         struct atl1e_adapter *adapter = netdev_priv(netdev);
 441         struct pci_dev *pdev = adapter->pdev;
 442         struct mii_ioctl_data *data = if_mii(ifr);
 443         unsigned long flags;
 444         int retval = 0;
 445
 446         if (!netif_running(netdev))
 447                 return -EINVAL;
 448
 449         spin_lock_irqsave(&adapter->mdio_lock, flags);
 450         switch (cmd) {
 451         case SIOCGMIIPHY:
 452                 data->phy_id = 0;
 453                 break;
 454
 455         case SIOCGMIIREG:
 456                 if (!capable(CAP_NET_ADMIN)) {
 457                         retval = -EPERM;
 458                         goto out;
 459                 }
 460                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 461                                     &data->val_out)) {
 462                         retval = -EIO;
 463                         goto out;
 464                 }
 465                 break;
 466
 467         case SIOCSMIIREG:
 468                 if (!capable(CAP_NET_ADMIN)) {
 469                         retval = -EPERM;
 470                         goto out;
 471                 }
 472                 if (data->reg_num & ~(0x1F)) {
 473                         retval = -EFAULT;
 474                         goto out;
 475                 }
 476
 477                 dev_dbg(&pdev->dev, "<atl1e_mii_ioctl> write %x %x",
 478                                 data->reg_num, data->val_in);
 479                 if (atl1e_write_phy_reg(&adapter->hw,
 480                                      data->reg_num, data->val_in)) {
 481                         retval = -EIO;
 482                         goto out;
 483                 }
 484                 break;
 485
 486         default:
 487                 retval = -EOPNOTSUPP;
 488                 break;
 489         }
 490 out:
 491         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 492         return retval;
 493
 494 }
 495
 496 /*
 497  * atl1e_ioctl -
 498  * @netdev:
 499  * @ifreq:
 500  * @cmd:
 501  */
 502 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 503 {
 504         switch (cmd) {
 505         case SIOCGMIIPHY:
 506         case SIOCGMIIREG:
 507         case SIOCSMIIREG:
 508                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 509         default:
 510                 return -EOPNOTSUPP;
 511         }
 512 }
 513
 514 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 515 {
 516         u16 cmd;
 517
 518         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 519         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 520         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 521         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 522
 523         /*
 524          * some motherboards BIOS(PXE/EFI) driver may set PME
 525          * while they transfer control to OS (Windows/Linux)
 526          * so we should clear this bit before NIC work normally
 527          */
 528         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 529         msleep(1);
 530 }
 531
 532 /*
 533  * atl1e_alloc_queues - Allocate memory for all rings
 534  * @adapter: board private structure to initialize
 535  *
 536  */
 537 static int __devinit atl1e_alloc_queues(struct atl1e_adapter *adapter)
 538 {
 539         return 0;
 540 }
 541
 542 /*
 543  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 544  * @adapter: board private structure to initialize
 545  *
 546  * atl1e_sw_init initializes the Adapter private data structure.
 547  * Fields are initialized based on PCI device information and
 548  * OS network device settings (MTU size).
 549  */
 550 static int __devinit atl1e_sw_init(struct atl1e_adapter *adapter)
 551 {
 552         struct atl1e_hw *hw   = &adapter->hw;
 553         struct pci_dev  *pdev = adapter->pdev;
 554         u32 phy_status_data = 0;
 555
 556         adapter->wol = 0;
 557         adapter->link_speed = SPEED_0;   /* hardware init */
 558         adapter->link_duplex = FULL_DUPLEX;
 559         adapter->num_rx_queues = 1;
 560
 561         /* PCI config space info */
 562         hw->vendor_id = pdev->vendor;
 563         hw->device_id = pdev->device;
 564         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 565         hw->subsystem_id = pdev->subsystem_device;
 566
 567         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 568         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 569
 570         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 571         /* nic type */
 572         if (hw->revision_id >= 0xF0) {
 573                 hw->nic_type = athr_l2e_revB;
 574         } else {
 575                 if (phy_status_data & PHY_STATUS_100M)
 576                         hw->nic_type = athr_l1e;
 577                 else
 578                         hw->nic_type = athr_l2e_revA;
 579         }
 580
 581         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 582
 583         if (phy_status_data & PHY_STATUS_EMI_CA)
 584                 hw->emi_ca = true;
 585         else
 586                 hw->emi_ca = false;
 587
 588         hw->phy_configured = false;
 589         hw->preamble_len = 7;
 590         hw->max_frame_size = adapter->netdev->mtu;
 591         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 592                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 593
 594         hw->rrs_type = atl1e_rrs_disable;
 595         hw->indirect_tab = 0;
 596         hw->base_cpu = 0;
 597
 598         /* need confirm */
 599
 600         hw->ict = 50000;                 /* 100ms */
 601         hw->smb_timer = 200000;          /* 200ms  */
 602         hw->tpd_burst = 5;
 603         hw->rrd_thresh = 1;
 604         hw->tpd_thresh = adapter->tx_ring.count / 2;
 605         hw->rx_count_down = 4;  /* 2us resolution */
 606         hw->tx_count_down = hw->imt * 4 / 3;
 607         hw->dmar_block = atl1e_dma_req_1024;
 608         hw->dmaw_block = atl1e_dma_req_1024;
 609         hw->dmar_dly_cnt = 15;
 610         hw->dmaw_dly_cnt = 4;
 611
 612         if (atl1e_alloc_queues(adapter)) {
 613                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 614                 return -ENOMEM;
 615         }
 616
 617         atomic_set(&adapter->irq_sem, 1);
 618         spin_lock_init(&adapter->mdio_lock);
 619         spin_lock_init(&adapter->tx_lock);
 620
 621         set_bit(__AT_DOWN, &adapter->flags);
 622
 623         return 0;
 624 }
 625
 626 /*
 627  * atl1e_clean_tx_ring - Free Tx-skb
 628  * @adapter: board private structure
 629  */
 630 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 631 {
 632         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
 633                                 &adapter->tx_ring;
 634         struct atl1e_tx_buffer *tx_buffer = NULL;
 635         struct pci_dev *pdev = adapter->pdev;
 636         u16 index, ring_count;
 637
 638         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 639                 return;
 640
 641         ring_count = tx_ring->count;
 642         /* first unmmap dma */
 643         for (index = 0; index < ring_count; index++) {
 644                 tx_buffer = &tx_ring->tx_buffer[index];
 645                 if (tx_buffer->dma) {
 646                         pci_unmap_page(pdev, tx_buffer->dma,
 647                                         tx_buffer->length, PCI_DMA_TODEVICE);
 648                         tx_buffer->dma = 0;
 649                 }
 650         }
 651         /* second free skb */
 652         for (index = 0; index < ring_count; index++) {
 653                 tx_buffer = &tx_ring->tx_buffer[index];
 654                 if (tx_buffer->skb) {
 655                         dev_kfree_skb_any(tx_buffer->skb);
 656                         tx_buffer->skb = NULL;
 657                 }
 658         }
 659         /* Zero out Tx-buffers */
 660         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 661                                 ring_count);
 662         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 663                                 ring_count);
 664 }
 665
 666 /*
 667  * atl1e_clean_rx_ring - Free rx-reservation skbs
 668  * @adapter: board private structure
 669  */
 670 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 671 {
 672         struct atl1e_rx_ring *rx_ring =
 673                 (struct atl1e_rx_ring *)&adapter->rx_ring;
 674         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 675         u16 i, j;
 676
 677
 678         if (adapter->ring_vir_addr == NULL)
 679                 return;
 680         /* Zero out the descriptor ring */
 681         for (i = 0; i < adapter->num_rx_queues; i++) {
 682                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 683                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 684                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 685                                                 rx_ring->real_page_size);
 686                         }
 687                 }
 688         }
 689 }
 690
 691 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 692 {
 693         *ring_size = ((u32)(adapter->tx_ring.count *
 694                      sizeof(struct atl1e_tpd_desc) + 7
 695                         /* tx ring, qword align */
 696                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 697                         adapter->num_rx_queues + 31
 698                         /* rx ring,  32 bytes align */
 699                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 700                         sizeof(u32) + 3));
 701                         /* tx, rx cmd, dword align   */
 702 }
 703
 704 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 705 {
 706         struct atl1e_tx_ring *tx_ring = NULL;
 707         struct atl1e_rx_ring *rx_ring = NULL;
 708
 709         tx_ring = &adapter->tx_ring;
 710         rx_ring = &adapter->rx_ring;
 711
 712         rx_ring->real_page_size = adapter->rx_ring.page_size
 713                                  + adapter->hw.max_frame_size
 714                                  + ETH_HLEN + VLAN_HLEN
 715                                  + ETH_FCS_LEN;
 716         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 717         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 718
 719         adapter->ring_vir_addr = NULL;
 720         adapter->rx_ring.desc = NULL;
 721         rwlock_init(&adapter->tx_ring.tx_lock);
 722
 723         return;
 724 }
 725
 726 /*
 727  * Read / Write Ptr Initialize:
 728  */
 729 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 730 {
 731         struct atl1e_tx_ring *tx_ring = NULL;
 732         struct atl1e_rx_ring *rx_ring = NULL;
 733         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 734         int i, j;
 735
 736         tx_ring = &adapter->tx_ring;
 737         rx_ring = &adapter->rx_ring;
 738         rx_page_desc = rx_ring->rx_page_desc;
 739
 740         tx_ring->next_to_use = 0;
 741         atomic_set(&tx_ring->next_to_clean, 0);
 742
 743         for (i = 0; i < adapter->num_rx_queues; i++) {
 744                 rx_page_desc[i].rx_using  = 0;
 745                 rx_page_desc[i].rx_nxseq = 0;
 746                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 747                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 748                         rx_page_desc[i].rx_page[j].read_offset = 0;
 749                 }
 750         }
 751 }
 752
 753 /*
 754  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 755  * @adapter: board private structure
 756  *
 757  * Free all transmit software resources
 758  */
 759 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 760 {
 761         struct pci_dev *pdev = adapter->pdev;
 762
 763         atl1e_clean_tx_ring(adapter);
 764         atl1e_clean_rx_ring(adapter);
 765
 766         if (adapter->ring_vir_addr) {
 767                 pci_free_consistent(pdev, adapter->ring_size,
 768                                 adapter->ring_vir_addr, adapter->ring_dma);
 769                 adapter->ring_vir_addr = NULL;
 770         }
 771
 772         if (adapter->tx_ring.tx_buffer) {
 773                 kfree(adapter->tx_ring.tx_buffer);
 774                 adapter->tx_ring.tx_buffer = NULL;
 775         }
 776 }
 777
 778 /*
 779  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 780  * @adapter: board private structure
 781  *
 782  * Return 0 on success, negative on failure
 783  */
 784 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 785 {
 786         struct pci_dev *pdev = adapter->pdev;
 787         struct atl1e_tx_ring *tx_ring;
 788         struct atl1e_rx_ring *rx_ring;
 789         struct atl1e_rx_page_desc  *rx_page_desc;
 790         int size, i, j;
 791         u32 offset = 0;
 792         int err = 0;
 793
 794         if (adapter->ring_vir_addr != NULL)
 795                 return 0; /* alloced already */
 796
 797         tx_ring = &adapter->tx_ring;
 798         rx_ring = &adapter->rx_ring;
 799
 800         /* real ring DMA buffer */
 801
 802         size = adapter->ring_size;
 803         adapter->ring_vir_addr = pci_alloc_consistent(pdev,
 804                         adapter->ring_size, &adapter->ring_dma);
 805
 806         if (adapter->ring_vir_addr == NULL) {
 807                 dev_err(&pdev->dev, "pci_alloc_consistent failed, "
 808                                     "size = D%d", size);
 809                 return -ENOMEM;
 810         }
 811
 812         memset(adapter->ring_vir_addr, 0, adapter->ring_size);
 813
 814         rx_page_desc = rx_ring->rx_page_desc;
 815
 816         /* Init TPD Ring */
 817         tx_ring->dma = roundup(adapter->ring_dma, 8);
 818         offset = tx_ring->dma - adapter->ring_dma;
 819         tx_ring->desc = (struct atl1e_tpd_desc *)
 820                         (adapter->ring_vir_addr + offset);
 821         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 822         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 823         if (tx_ring->tx_buffer == NULL) {
 824                 dev_err(&pdev->dev, "kzalloc failed , size = D%d", size);
 825                 err = -ENOMEM;
 826                 goto failed;
 827         }
 828
 829         /* Init RXF-Pages */
 830         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 831         offset = roundup(offset, 32);
 832
 833         for (i = 0; i < adapter->num_rx_queues; i++) {
 834                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 835                         rx_page_desc[i].rx_page[j].dma =
 836                                 adapter->ring_dma + offset;
 837                         rx_page_desc[i].rx_page[j].addr =
 838                                 adapter->ring_vir_addr + offset;
 839                         offset += rx_ring->real_page_size;
 840                 }
 841         }
 842
 843         /* Init CMB dma address */
 844         tx_ring->cmb_dma = adapter->ring_dma + offset;
 845         tx_ring->cmb     = (u32 *)(adapter->ring_vir_addr + offset);
 846         offset += sizeof(u32);
 847
 848         for (i = 0; i < adapter->num_rx_queues; i++) {
 849                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 850                         rx_page_desc[i].rx_page[j].write_offset_dma =
 851                                 adapter->ring_dma + offset;
 852                         rx_page_desc[i].rx_page[j].write_offset_addr =
 853                                 adapter->ring_vir_addr + offset;
 854                         offset += sizeof(u32);
 855                 }
 856         }
 857
 858         if (unlikely(offset > adapter->ring_size)) {
 859                 dev_err(&pdev->dev, "offset(%d) > ring size(%d) !!\n",
 860                                 offset, adapter->ring_size);
 861                 err = -1;
 862                 goto failed;
 863         }
 864
 865         return 0;
 866 failed:
 867         if (adapter->ring_vir_addr != NULL) {
 868                 pci_free_consistent(pdev, adapter->ring_size,
 869                                 adapter->ring_vir_addr, adapter->ring_dma);
 870                 adapter->ring_vir_addr = NULL;
 871         }
 872         return err;
 873 }
 874
 875 static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter)
 876 {
 877
 878         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 879         struct atl1e_rx_ring *rx_ring =
 880                         (struct atl1e_rx_ring *)&adapter->rx_ring;
 881         struct atl1e_tx_ring *tx_ring =
 882                         (struct atl1e_tx_ring *)&adapter->tx_ring;
 883         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 884         int i, j;
 885
 886         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 887                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 888         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 889                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 890         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 891         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 892                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 893
 894         rx_page_desc = rx_ring->rx_page_desc;
 895         /* RXF Page Physical address / Page Length */
 896         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 897                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 898                                  (u32)((adapter->ring_dma &
 899                                  AT_DMA_HI_ADDR_MASK) >> 32));
 900                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 901                         u32 page_phy_addr;
 902                         u32 offset_phy_addr;
 903
 904                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 905                         offset_phy_addr =
 906                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 907
 908                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 909                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 910                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 911                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 912                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 913                 }
 914         }
 915         /* Page Length */
 916         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 917         /* Load all of base address above */
 918         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 919
 920         return;
 921 }
 922
 923 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 924 {
 925         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 926         u32 dev_ctrl_data = 0;
 927         u32 max_pay_load = 0;
 928         u32 jumbo_thresh = 0;
 929         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 930
 931         /* configure TXQ param */
 932         if (hw->nic_type != athr_l2e_revB) {
 933                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 934                 if (hw->max_frame_size <= 1500) {
 935                         jumbo_thresh = hw->max_frame_size + extra_size;
 936                 } else if (hw->max_frame_size < 6*1024) {
 937                         jumbo_thresh =
 938                                 (hw->max_frame_size + extra_size) * 2 / 3;
 939                 } else {
 940                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 941                 }
 942                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 943         }
 944
 945         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 946
 947         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 948                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 949
 950         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
 951
 952         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 953                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 954         hw->dmar_block = min(max_pay_load, hw->dmar_block);
 955
 956         if (hw->nic_type != athr_l2e_revB)
 957                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 958                               atl1e_pay_load_size[hw->dmar_block]);
 959         /* enable TXQ */
 960         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 961                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 962                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 963                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 964         return;
 965 }
 966
 967 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 968 {
 969         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 970         u32 rxf_len  = 0;
 971         u32 rxf_low  = 0;
 972         u32 rxf_high = 0;
 973         u32 rxf_thresh_data = 0;
 974         u32 rxq_ctrl_data = 0;
 975
 976         if (hw->nic_type != athr_l2e_revB) {
 977                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 978                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 979                               RXQ_JMBOSZ_TH_SHIFT |
 980                               (1 & RXQ_JMBO_LKAH_MASK) <<
 981                               RXQ_JMBO_LKAH_SHIFT));
 982
 983                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 984                 rxf_high = rxf_len * 4 / 5;
 985                 rxf_low  = rxf_len / 5;
 986                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 987                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 988                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 989                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 990
 991                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 992         }
 993
 994         /* RRS */
 995         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
 996         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
 997
 998         if (hw->rrs_type & atl1e_rrs_ipv4)
 999                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1000
1001         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1002                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1003
1004         if (hw->rrs_type & atl1e_rrs_ipv6)
1005                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1006
1007         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1008                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1009
1010         if (hw->rrs_type != atl1e_rrs_disable)
1011                 rxq_ctrl_data |=
1012                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1013
1014         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1015                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1016
1017         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1018         return;
1019 }
1020
1021 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1022 {
1023         struct atl1e_hw *hw = &adapter->hw;
1024         u32 dma_ctrl_data = 0;
1025
1026         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1027         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1028                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1029         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1030                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1031         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1032         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1033                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1034         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1035                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1036
1037         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1038         return;
1039 }
1040
1041 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1042 {
1043         u32 value;
1044         struct atl1e_hw *hw = &adapter->hw;
1045         struct net_device *netdev = adapter->netdev;
1046
1047         /* Config MAC CTRL Register */
1048         value = MAC_CTRL_TX_EN |
1049                 MAC_CTRL_RX_EN ;
1050
1051         if (FULL_DUPLEX == adapter->link_duplex)
1052                 value |= MAC_CTRL_DUPLX;
1053
1054         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1055                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1056                           MAC_CTRL_SPEED_SHIFT);
1057         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1058
1059         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1060         value |= (((u32)adapter->hw.preamble_len &
1061                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1062
1063         if (adapter->vlgrp)
1064                 value |= MAC_CTRL_RMV_VLAN;
1065
1066         value |= MAC_CTRL_BC_EN;
1067         if (netdev->flags & IFF_PROMISC)
1068                 value |= MAC_CTRL_PROMIS_EN;
1069         if (netdev->flags & IFF_ALLMULTI)
1070                 value |= MAC_CTRL_MC_ALL_EN;
1071
1072         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1073 }
1074
1075 /*
1076  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1077  * @adapter: board private structure
1078  *
1079  * Configure the Tx /Rx unit of the MAC after a reset.
1080  */
1081 static int atl1e_configure(struct atl1e_adapter *adapter)
1082 {
1083         struct atl1e_hw *hw = &adapter->hw;
1084         struct pci_dev *pdev = adapter->pdev;
1085
1086         u32 intr_status_data = 0;
1087
1088         /* clear interrupt status */
1089         AT_WRITE_REG(hw, REG_ISR, ~0);
1090
1091         /* 1. set MAC Address */
1092         atl1e_hw_set_mac_addr(hw);
1093
1094         /* 2. Init the Multicast HASH table done by set_muti */
1095
1096         /* 3. Clear any WOL status */
1097         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1098
1099         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1100          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1101          *    High 32bits memory */
1102         atl1e_configure_des_ring(adapter);
1103
1104         /* 5. set Interrupt Moderator Timer */
1105         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1106         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1107         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1108                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1109
1110         /* 6. rx/tx threshold to trig interrupt */
1111         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1112         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1113         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1114         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1115
1116         /* 7. set Interrupt Clear Timer */
1117         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1118
1119         /* 8. set MTU */
1120         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1121                         VLAN_HLEN + ETH_FCS_LEN);
1122
1123         /* 9. config TXQ early tx threshold */
1124         atl1e_configure_tx(adapter);
1125
1126         /* 10. config RXQ */
1127         atl1e_configure_rx(adapter);
1128
1129         /* 11. config  DMA Engine */
1130         atl1e_configure_dma(adapter);
1131
1132         /* 12. smb timer to trig interrupt */
1133         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1134
1135         intr_status_data = AT_READ_REG(hw, REG_ISR);
1136         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1137                 dev_err(&pdev->dev, "atl1e_configure failed,"
1138                                 "PCIE phy link down\n");
1139                 return -1;
1140         }
1141
1142         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1143         return 0;
1144 }
1145
1146 /*
1147  * atl1e_get_stats - Get System Network Statistics
1148  * @netdev: network interface device structure
1149  *
1150  * Returns the address of the device statistics structure.
1151  * The statistics are actually updated from the timer callback.
1152  */
1153 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1154 {
1155         struct atl1e_adapter *adapter = netdev_priv(netdev);
1156         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1157         struct net_device_stats *net_stats = &adapter->net_stats;
1158
1159         net_stats->rx_packets = hw_stats->rx_ok;
1160         net_stats->tx_packets = hw_stats->tx_ok;
1161         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1162         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1163         net_stats->multicast  = hw_stats->rx_mcast;
1164         net_stats->collisions = hw_stats->tx_1_col +
1165                                 hw_stats->tx_2_col * 2 +
1166                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1167
1168         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1169                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1170                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1171         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1172         net_stats->rx_length_errors = hw_stats->rx_len_err;
1173         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1174         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1175         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1176
1177         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1178
1179         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1180                                hw_stats->tx_underrun + hw_stats->tx_trunc;
1181         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1182         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1183         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1184
1185         return &adapter->net_stats;
1186 }
1187
1188 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1189 {
1190         u16 hw_reg_addr = 0;
1191         unsigned long *stats_item = NULL;
1192
1193         /* update rx status */
1194         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1195         stats_item  = &adapter->hw_stats.rx_ok;
1196         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1197                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1198                 stats_item++;
1199                 hw_reg_addr += 4;
1200         }
1201         /* update tx status */
1202         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1203         stats_item  = &adapter->hw_stats.tx_ok;
1204         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1205                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1206                 stats_item++;
1207                 hw_reg_addr += 4;
1208         }
1209 }
1210
1211 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1212 {
1213         u16 phy_data;
1214
1215         spin_lock(&adapter->mdio_lock);
1216         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1217         spin_unlock(&adapter->mdio_lock);
1218 }
1219
1220 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1221 {
1222         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
1223                                         &adapter->tx_ring;
1224         struct atl1e_tx_buffer *tx_buffer = NULL;
1225         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1226         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1227
1228         while (next_to_clean != hw_next_to_clean) {
1229                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1230                 if (tx_buffer->dma) {
1231                         pci_unmap_page(adapter->pdev, tx_buffer->dma,
1232                                         tx_buffer->length, PCI_DMA_TODEVICE);
1233                         tx_buffer->dma = 0;
1234                 }
1235
1236                 if (tx_buffer->skb) {
1237                         dev_kfree_skb_irq(tx_buffer->skb);
1238                         tx_buffer->skb = NULL;
1239                 }
1240
1241                 if (++next_to_clean == tx_ring->count)
1242                         next_to_clean = 0;
1243         }
1244
1245         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1246
1247         if (netif_queue_stopped(adapter->netdev) &&
1248                         netif_carrier_ok(adapter->netdev)) {
1249                 netif_wake_queue(adapter->netdev);
1250         }
1251
1252         return true;
1253 }
1254
1255 /*
1256  * atl1e_intr - Interrupt Handler
1257  * @irq: interrupt number
1258  * @data: pointer to a network interface device structure
1259  * @pt_regs: CPU registers structure
1260  */
1261 static irqreturn_t atl1e_intr(int irq, void *data)
1262 {
1263         struct net_device *netdev  = data;
1264         struct atl1e_adapter *adapter = netdev_priv(netdev);
1265         struct pci_dev *pdev = adapter->pdev;
1266         struct atl1e_hw *hw = &adapter->hw;
1267         int max_ints = AT_MAX_INT_WORK;
1268         int handled = IRQ_NONE;
1269         u32 status;
1270
1271         do {
1272                 status = AT_READ_REG(hw, REG_ISR);
1273                 if ((status & IMR_NORMAL_MASK) == 0 ||
1274                                 (status & ISR_DIS_INT) != 0) {
1275                         if (max_ints != AT_MAX_INT_WORK)
1276                                 handled = IRQ_HANDLED;
1277                         break;
1278                 }
1279                 /* link event */
1280                 if (status & ISR_GPHY)
1281                         atl1e_clear_phy_int(adapter);
1282                 /* Ack ISR */
1283                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1284
1285                 handled = IRQ_HANDLED;
1286                 /* check if PCIE PHY Link down */
1287                 if (status & ISR_PHY_LINKDOWN) {
1288                         dev_err(&pdev->dev,
1289                                 "pcie phy linkdown %x\n", status);
1290                         if (netif_running(adapter->netdev)) {
1291                                 /* reset MAC */
1292                                 atl1e_irq_reset(adapter);
1293                                 schedule_work(&adapter->reset_task);
1294                                 break;
1295                         }
1296                 }
1297
1298                 /* check if DMA read/write error */
1299                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1300                         dev_err(&pdev->dev,
1301                                 "PCIE DMA RW error (status = 0x%x)\n",
1302                                 status);
1303                         atl1e_irq_reset(adapter);
1304                         schedule_work(&adapter->reset_task);
1305                         break;
1306                 }
1307
1308                 if (status & ISR_SMB)
1309                         atl1e_update_hw_stats(adapter);
1310
1311                 /* link event */
1312                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1313                         adapter->net_stats.tx_carrier_errors++;
1314                         atl1e_link_chg_event(adapter);
1315                         break;
1316                 }
1317
1318                 /* transmit event */
1319                 if (status & ISR_TX_EVENT)
1320                         atl1e_clean_tx_irq(adapter);
1321
1322                 if (status & ISR_RX_EVENT) {
1323                         /*
1324                          * disable rx interrupts, without
1325                          * the synchronize_irq bit
1326                          */
1327                         AT_WRITE_REG(hw, REG_IMR,
1328                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1329                         AT_WRITE_FLUSH(hw);
1330                         if (likely(napi_schedule_prep(
1331                                    &adapter->napi)))
1332                                 __napi_schedule(&adapter->napi);
1333                 }
1334         } while (--max_ints > 0);
1335         /* re-enable Interrupt*/
1336         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1337
1338         return handled;
1339 }
1340
1341 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1342                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1343 {
1344         u8 *packet = (u8 *)(prrs + 1);
1345         struct iphdr *iph;
1346         u16 head_len = ETH_HLEN;
1347         u16 pkt_flags;
1348         u16 err_flags;
1349
1350         skb->ip_summed = CHECKSUM_NONE;
1351         pkt_flags = prrs->pkt_flag;
1352         err_flags = prrs->err_flag;
1353         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1354                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1355                 if (pkt_flags & RRS_IS_IPV4) {
1356                         if (pkt_flags & RRS_IS_802_3)
1357                                 head_len += 8;
1358                         iph = (struct iphdr *) (packet + head_len);
1359                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1360                                 goto hw_xsum;
1361                 }
1362                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1363                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1364                         return;
1365                 }
1366         }
1367
1368 hw_xsum :
1369         return;
1370 }
1371
1372 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1373                                                u8 que)
1374 {
1375         struct atl1e_rx_page_desc *rx_page_desc =
1376                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1377         u8 rx_using = rx_page_desc[que].rx_using;
1378
1379         return (struct atl1e_rx_page *)&(rx_page_desc[que].rx_page[rx_using]);
1380 }
1381
1382 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1383                    int *work_done, int work_to_do)
1384 {
1385         struct pci_dev *pdev = adapter->pdev;
1386         struct net_device *netdev  = adapter->netdev;
1387         struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *)
1388                                          &adapter->rx_ring;
1389         struct atl1e_rx_page_desc *rx_page_desc =
1390                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1391         struct sk_buff *skb = NULL;
1392         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1393         u32 packet_size, write_offset;
1394         struct atl1e_recv_ret_status *prrs;
1395
1396         write_offset = *(rx_page->write_offset_addr);
1397         if (likely(rx_page->read_offset < write_offset)) {
1398                 do {
1399                         if (*work_done >= work_to_do)
1400                                 break;
1401                         (*work_done)++;
1402                         /* get new packet's  rrs */
1403                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1404                                                  rx_page->read_offset);
1405                         /* check sequence number */
1406                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1407                                 dev_err(&pdev->dev,
1408                                         "rx sequence number"
1409                                         " error (rx=%d) (expect=%d)\n",
1410                                         prrs->seq_num,
1411                                         rx_page_desc[que].rx_nxseq);
1412                                 rx_page_desc[que].rx_nxseq++;
1413                                 /* just for debug use */
1414                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1415                                              (((u32)prrs->seq_num) << 16) |
1416                                              rx_page_desc[que].rx_nxseq);
1417                                 goto fatal_err;
1418                         }
1419                         rx_page_desc[que].rx_nxseq++;
1420
1421                         /* error packet */
1422                         if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
1423                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1424                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1425                                         RRS_ERR_TRUNC)) {
1426                                 /* hardware error, discard this packet*/
1427                                         dev_err(&pdev->dev,
1428                                                 "rx packet desc error %x\n",
1429                                                 *((u32 *)prrs + 1));
1430                                         goto skip_pkt;
1431                                 }
1432                         }
1433
1434                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1435                                         RRS_PKT_SIZE_MASK) - 4; /* CRC */
1436                         skb = netdev_alloc_skb(netdev,
1437                                                packet_size + NET_IP_ALIGN);
1438                         if (skb == NULL) {
1439                                 dev_warn(&pdev->dev, "%s: Memory squeeze,"
1440                                         "deferring packet.\n", netdev->name);
1441                                 goto skip_pkt;
1442                         }
1443                         skb_reserve(skb, NET_IP_ALIGN);
1444                         skb->dev = netdev;
1445                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1446                         skb_put(skb, packet_size);
1447                         skb->protocol = eth_type_trans(skb, netdev);
1448                         atl1e_rx_checksum(adapter, skb, prrs);
1449
1450                         if (unlikely(adapter->vlgrp &&
1451                                 (prrs->pkt_flag & RRS_IS_VLAN_TAG))) {
1452                                 u16 vlan_tag = (prrs->vtag >> 4) |
1453                                                ((prrs->vtag & 7) << 13) |
1454                                                ((prrs->vtag & 8) << 9);
1455                                 dev_dbg(&pdev->dev,
1456                                         "RXD VLAN TAG<RRD>=0x%04x\n",
1457                                         prrs->vtag);
1458                                 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
1459                                                          vlan_tag);
1460                         } else {
1461                                 netif_receive_skb(skb);
1462                         }
1463
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 pci_dev    *pdev    = adapter->pdev;
1506         u32 imr_data;
1507         int work_done = 0;
1508
1509         /* Keep link state information with original netdev */
1510         if (!netif_carrier_ok(adapter->netdev))
1511                 goto quit_polling;
1512
1513         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1514
1515         /* If no Tx and not enough Rx work done, exit the polling mode */
1516         if (work_done < budget) {
1517 quit_polling:
1518                 napi_complete(napi);
1519                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1520                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1521                 /* test debug */
1522                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1523                         atomic_dec(&adapter->irq_sem);
1524                         dev_err(&pdev->dev,
1525                                 "atl1e_clean is called when AT_DOWN\n");
1526                 }
1527                 /* reenable RX intr */
1528                 /*atl1e_irq_enable(adapter); */
1529
1530         }
1531         return work_done;
1532 }
1533
1534 #ifdef CONFIG_NET_POLL_CONTROLLER
1535
1536 /*
1537  * Polling 'interrupt' - used by things like netconsole to send skbs
1538  * without having to re-enable interrupts. It's not called while
1539  * the interrupt routine is executing.
1540  */
1541 static void atl1e_netpoll(struct net_device *netdev)
1542 {
1543         struct atl1e_adapter *adapter = netdev_priv(netdev);
1544
1545         disable_irq(adapter->pdev->irq);
1546         atl1e_intr(adapter->pdev->irq, netdev);
1547         enable_irq(adapter->pdev->irq);
1548 }
1549 #endif
1550
1551 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1552 {
1553         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1554         u16 next_to_use = 0;
1555         u16 next_to_clean = 0;
1556
1557         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1558         next_to_use   = tx_ring->next_to_use;
1559
1560         return (u16)(next_to_clean > next_to_use) ?
1561                 (next_to_clean - next_to_use - 1) :
1562                 (tx_ring->count + next_to_clean - next_to_use - 1);
1563 }
1564
1565 /*
1566  * get next usable tpd
1567  * Note: should call atl1e_tdp_avail to make sure
1568  * there is enough tpd to use
1569  */
1570 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1571 {
1572         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1573         u16 next_to_use = 0;
1574
1575         next_to_use = tx_ring->next_to_use;
1576         if (++tx_ring->next_to_use == tx_ring->count)
1577                 tx_ring->next_to_use = 0;
1578
1579         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1580         return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use];
1581 }
1582
1583 static struct atl1e_tx_buffer *
1584 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1585 {
1586         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1587
1588         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1589 }
1590
1591 /* Calculate the transmit packet descript needed*/
1592 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1593 {
1594         int i = 0;
1595         u16 tpd_req = 1;
1596         u16 fg_size = 0;
1597         u16 proto_hdr_len = 0;
1598
1599         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1600                 fg_size = skb_shinfo(skb)->frags[i].size;
1601                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1602         }
1603
1604         if (skb_is_gso(skb)) {
1605                 if (skb->protocol == ntohs(ETH_P_IP) ||
1606                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1607                         proto_hdr_len = skb_transport_offset(skb) +
1608                                         tcp_hdrlen(skb);
1609                         if (proto_hdr_len < skb_headlen(skb)) {
1610                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1611                                            MAX_TX_BUF_LEN - 1) >>
1612                                            MAX_TX_BUF_SHIFT);
1613                         }
1614                 }
1615
1616         }
1617         return tpd_req;
1618 }
1619
1620 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1621                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1622 {
1623         struct pci_dev *pdev = adapter->pdev;
1624         u8 hdr_len;
1625         u32 real_len;
1626         unsigned short offload_type;
1627         int err;
1628
1629         if (skb_is_gso(skb)) {
1630                 if (skb_header_cloned(skb)) {
1631                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1632                         if (unlikely(err))
1633                                 return -1;
1634                 }
1635                 offload_type = skb_shinfo(skb)->gso_type;
1636
1637                 if (offload_type & SKB_GSO_TCPV4) {
1638                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1639                                         + ntohs(ip_hdr(skb)->tot_len));
1640
1641                         if (real_len < skb->len)
1642                                 pskb_trim(skb, real_len);
1643
1644                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1645                         if (unlikely(skb->len == hdr_len)) {
1646                                 /* only xsum need */
1647                                 dev_warn(&pdev->dev,
1648                                       "IPV4 tso with zero data??\n");
1649                                 goto check_sum;
1650                         } else {
1651                                 ip_hdr(skb)->check = 0;
1652                                 ip_hdr(skb)->tot_len = 0;
1653                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1654                                                         ip_hdr(skb)->saddr,
1655                                                         ip_hdr(skb)->daddr,
1656                                                         0, IPPROTO_TCP, 0);
1657                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1658                                         TDP_V4_IPHL_MASK) <<
1659                                         TPD_V4_IPHL_SHIFT;
1660                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1661                                         TPD_TCPHDRLEN_MASK) <<
1662                                         TPD_TCPHDRLEN_SHIFT;
1663                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1664                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1665                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1666                         }
1667                         return 0;
1668                 }
1669
1670                 if (offload_type & SKB_GSO_TCPV6) {
1671                         real_len = (((unsigned char *)ipv6_hdr(skb) - skb->data)
1672                                         + ntohs(ipv6_hdr(skb)->payload_len));
1673                         if (real_len < skb->len)
1674                                 pskb_trim(skb, real_len);
1675
1676                         /* check payload == 0 byte ? */
1677                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1678                         if (unlikely(skb->len == hdr_len)) {
1679                                 /* only xsum need */
1680                                 dev_warn(&pdev->dev,
1681                                         "IPV6 tso with zero data??\n");
1682                                 goto check_sum;
1683                         } else {
1684                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1685                                                 &ipv6_hdr(skb)->saddr,
1686                                                 &ipv6_hdr(skb)->daddr,
1687                                                 0, IPPROTO_TCP, 0);
1688                                 tpd->word3 |= 1 << TPD_IP_VERSION_SHIFT;
1689                                 hdr_len >>= 1;
1690                                 tpd->word3 |= (hdr_len & TPD_V6_IPHLLO_MASK) <<
1691                                         TPD_V6_IPHLLO_SHIFT;
1692                                 tpd->word3 |= ((hdr_len >> 3) &
1693                                         TPD_V6_IPHLHI_MASK) <<
1694                                         TPD_V6_IPHLHI_SHIFT;
1695                                 tpd->word3 |= (tcp_hdrlen(skb) >> 2 &
1696                                         TPD_TCPHDRLEN_MASK) <<
1697                                         TPD_TCPHDRLEN_SHIFT;
1698                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1699                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1700                                         tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1701                         }
1702                 }
1703                 return 0;
1704         }
1705
1706 check_sum:
1707         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1708                 u8 css, cso;
1709
1710                 cso = skb_transport_offset(skb);
1711                 if (unlikely(cso & 0x1)) {
1712                         dev_err(&adapter->pdev->dev,
1713                            "pay load offset should not ant event number\n");
1714                         return -1;
1715                 } else {
1716                         css = cso + skb->csum_offset;
1717                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1718                                         TPD_PLOADOFFSET_SHIFT;
1719                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1720                                         TPD_CCSUMOFFSET_SHIFT;
1721                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1722                 }
1723         }
1724
1725         return 0;
1726 }
1727
1728 static void atl1e_tx_map(struct atl1e_adapter *adapter,
1729                       struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1730 {
1731         struct atl1e_tpd_desc *use_tpd = NULL;
1732         struct atl1e_tx_buffer *tx_buffer = NULL;
1733         u16 buf_len = skb->len - skb->data_len;
1734         u16 map_len = 0;
1735         u16 mapped_len = 0;
1736         u16 hdr_len = 0;
1737         u16 nr_frags;
1738         u16 f;
1739         int segment;
1740
1741         nr_frags = skb_shinfo(skb)->nr_frags;
1742         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1743         if (segment) {
1744                 /* TSO */
1745                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1746                 use_tpd = tpd;
1747
1748                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1749                 tx_buffer->length = map_len;
1750                 tx_buffer->dma = pci_map_single(adapter->pdev,
1751                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1752                 mapped_len += map_len;
1753                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1754                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1755                         ((cpu_to_le32(tx_buffer->length) &
1756                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1757         }
1758
1759         while (mapped_len < buf_len) {
1760                 /* mapped_len == 0, means we should use the first tpd,
1761                    which is given by caller  */
1762                 if (mapped_len == 0) {
1763                         use_tpd = tpd;
1764                 } else {
1765                         use_tpd = atl1e_get_tpd(adapter);
1766                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1767                 }
1768                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1769                 tx_buffer->skb = NULL;
1770
1771                 tx_buffer->length = map_len =
1772                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1773                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1774                 tx_buffer->dma =
1775                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1776                                         map_len, PCI_DMA_TODEVICE);
1777                 mapped_len  += map_len;
1778                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1779                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1780                         ((cpu_to_le32(tx_buffer->length) &
1781                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1782         }
1783
1784         for (f = 0; f < nr_frags; f++) {
1785                 struct skb_frag_struct *frag;
1786                 u16 i;
1787                 u16 seg_num;
1788
1789                 frag = &skb_shinfo(skb)->frags[f];
1790                 buf_len = frag->size;
1791
1792                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1793                 for (i = 0; i < seg_num; i++) {
1794                         use_tpd = atl1e_get_tpd(adapter);
1795                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1796
1797                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1798                         if (tx_buffer->skb)
1799                                 BUG();
1800
1801                         tx_buffer->skb = NULL;
1802                         tx_buffer->length =
1803                                 (buf_len > MAX_TX_BUF_LEN) ?
1804                                 MAX_TX_BUF_LEN : buf_len;
1805                         buf_len -= tx_buffer->length;
1806
1807                         tx_buffer->dma =
1808                                 pci_map_page(adapter->pdev, frag->page,
1809                                                 frag->page_offset +
1810                                                 (i * MAX_TX_BUF_LEN),
1811                                                 tx_buffer->length,
1812                                                 PCI_DMA_TODEVICE);
1813                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1814                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1815                                         ((cpu_to_le32(tx_buffer->length) &
1816                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1817                 }
1818         }
1819
1820         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1821                 /* note this one is a tcp header */
1822                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1823         /* The last tpd */
1824
1825         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1826         /* The last buffer info contain the skb address,
1827            so it will be free after unmap */
1828         tx_buffer->skb = skb;
1829 }
1830
1831 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1832                            struct atl1e_tpd_desc *tpd)
1833 {
1834         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1835         /* Force memory writes to complete before letting h/w
1836          * know there are new descriptors to fetch.  (Only
1837          * applicable for weak-ordered memory model archs,
1838          * such as IA-64). */
1839         wmb();
1840         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1841 }
1842
1843 static int atl1e_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1844 {
1845         struct atl1e_adapter *adapter = netdev_priv(netdev);
1846         unsigned long flags;
1847         u16 tpd_req = 1;
1848         struct atl1e_tpd_desc *tpd;
1849
1850         if (test_bit(__AT_DOWN, &adapter->flags)) {
1851                 dev_kfree_skb_any(skb);
1852                 return NETDEV_TX_OK;
1853         }
1854
1855         if (unlikely(skb->len <= 0)) {
1856                 dev_kfree_skb_any(skb);
1857                 return NETDEV_TX_OK;
1858         }
1859         tpd_req = atl1e_cal_tdp_req(skb);
1860         if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1861                 return NETDEV_TX_LOCKED;
1862
1863         if (atl1e_tpd_avail(adapter) < tpd_req) {
1864                 /* no enough descriptor, just stop queue */
1865                 netif_stop_queue(netdev);
1866                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1867                 return NETDEV_TX_BUSY;
1868         }
1869
1870         tpd = atl1e_get_tpd(adapter);
1871
1872         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
1873                 u16 vlan_tag = vlan_tx_tag_get(skb);
1874                 u16 atl1e_vlan_tag;
1875
1876                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1877                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1878                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1879                                 TPD_VLAN_SHIFT;
1880         }
1881
1882         if (skb->protocol == ntohs(ETH_P_8021Q))
1883                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1884
1885         if (skb_network_offset(skb) != ETH_HLEN)
1886                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1887
1888         /* do TSO and check sum */
1889         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1890                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1891                 dev_kfree_skb_any(skb);
1892                 return NETDEV_TX_OK;
1893         }
1894
1895         atl1e_tx_map(adapter, skb, tpd);
1896         atl1e_tx_queue(adapter, tpd_req, tpd);
1897
1898         netdev->trans_start = jiffies;
1899         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1900         return NETDEV_TX_OK;
1901 }
1902
1903 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1904 {
1905         struct net_device *netdev = adapter->netdev;
1906
1907         free_irq(adapter->pdev->irq, netdev);
1908
1909         if (adapter->have_msi)
1910                 pci_disable_msi(adapter->pdev);
1911 }
1912
1913 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1914 {
1915         struct pci_dev    *pdev   = adapter->pdev;
1916         struct net_device *netdev = adapter->netdev;
1917         int flags = 0;
1918         int err = 0;
1919
1920         adapter->have_msi = true;
1921         err = pci_enable_msi(adapter->pdev);
1922         if (err) {
1923                 dev_dbg(&pdev->dev,
1924                         "Unable to allocate MSI interrupt Error: %d\n", err);
1925                 adapter->have_msi = false;
1926         } else
1927                 netdev->irq = pdev->irq;
1928
1929
1930         if (!adapter->have_msi)
1931                 flags |= IRQF_SHARED;
1932         err = request_irq(adapter->pdev->irq, &atl1e_intr, flags,
1933                         netdev->name, netdev);
1934         if (err) {
1935                 dev_dbg(&pdev->dev,
1936                         "Unable to allocate interrupt Error: %d\n", err);
1937                 if (adapter->have_msi)
1938                         pci_disable_msi(adapter->pdev);
1939                 return err;
1940         }
1941         dev_dbg(&pdev->dev, "atl1e_request_irq OK\n");
1942         return err;
1943 }
1944
1945 int atl1e_up(struct atl1e_adapter *adapter)
1946 {
1947         struct net_device *netdev = adapter->netdev;
1948         int err = 0;
1949         u32 val;
1950
1951         /* hardware has been reset, we need to reload some things */
1952         err = atl1e_init_hw(&adapter->hw);
1953         if (err) {
1954                 err = -EIO;
1955                 return err;
1956         }
1957         atl1e_init_ring_ptrs(adapter);
1958         atl1e_set_multi(netdev);
1959         atl1e_restore_vlan(adapter);
1960
1961         if (atl1e_configure(adapter)) {
1962                 err = -EIO;
1963                 goto err_up;
1964         }
1965
1966         clear_bit(__AT_DOWN, &adapter->flags);
1967         napi_enable(&adapter->napi);
1968         atl1e_irq_enable(adapter);
1969         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1970         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1971                       val | MASTER_CTRL_MANUAL_INT);
1972
1973 err_up:
1974         return err;
1975 }
1976
1977 void atl1e_down(struct atl1e_adapter *adapter)
1978 {
1979         struct net_device *netdev = adapter->netdev;
1980
1981         /* signal that we're down so the interrupt handler does not
1982          * reschedule our watchdog timer */
1983         set_bit(__AT_DOWN, &adapter->flags);
1984
1985 #ifdef NETIF_F_LLTX
1986         netif_stop_queue(netdev);
1987 #else
1988         netif_tx_disable(netdev);
1989 #endif
1990
1991         /* reset MAC to disable all RX/TX */
1992         atl1e_reset_hw(&adapter->hw);
1993         msleep(1);
1994
1995         napi_disable(&adapter->napi);
1996         atl1e_del_timer(adapter);
1997         atl1e_irq_disable(adapter);
1998
1999         netif_carrier_off(netdev);
2000         adapter->link_speed = SPEED_0;
2001         adapter->link_duplex = -1;
2002         atl1e_clean_tx_ring(adapter);
2003         atl1e_clean_rx_ring(adapter);
2004 }
2005
2006 /*
2007  * atl1e_open - Called when a network interface is made active
2008  * @netdev: network interface device structure
2009  *
2010  * Returns 0 on success, negative value on failure
2011  *
2012  * The open entry point is called when a network interface is made
2013  * active by the system (IFF_UP).  At this point all resources needed
2014  * for transmit and receive operations are allocated, the interrupt
2015  * handler is registered with the OS, the watchdog timer is started,
2016  * and the stack is notified that the interface is ready.
2017  */
2018 static int atl1e_open(struct net_device *netdev)
2019 {
2020         struct atl1e_adapter *adapter = netdev_priv(netdev);
2021         int err;
2022
2023         /* disallow open during test */
2024         if (test_bit(__AT_TESTING, &adapter->flags))
2025                 return -EBUSY;
2026
2027         /* allocate rx/tx dma buffer & descriptors */
2028         atl1e_init_ring_resources(adapter);
2029         err = atl1e_setup_ring_resources(adapter);
2030         if (unlikely(err))
2031                 return err;
2032
2033         err = atl1e_request_irq(adapter);
2034         if (unlikely(err))
2035                 goto err_req_irq;
2036
2037         err = atl1e_up(adapter);
2038         if (unlikely(err))
2039                 goto err_up;
2040
2041         return 0;
2042
2043 err_up:
2044         atl1e_free_irq(adapter);
2045 err_req_irq:
2046         atl1e_free_ring_resources(adapter);
2047         atl1e_reset_hw(&adapter->hw);
2048
2049         return err;
2050 }
2051
2052 /*
2053  * atl1e_close - Disables a network interface
2054  * @netdev: network interface device structure
2055  *
2056  * Returns 0, this is not allowed to fail
2057  *
2058  * The close entry point is called when an interface is de-activated
2059  * by the OS.  The hardware is still under the drivers control, but
2060  * needs to be disabled.  A global MAC reset is issued to stop the
2061  * hardware, and all transmit and receive resources are freed.
2062  */
2063 static int atl1e_close(struct net_device *netdev)
2064 {
2065         struct atl1e_adapter *adapter = netdev_priv(netdev);
2066
2067         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2068         atl1e_down(adapter);
2069         atl1e_free_irq(adapter);
2070         atl1e_free_ring_resources(adapter);
2071
2072         return 0;
2073 }
2074
2075 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2076 {
2077         struct net_device *netdev = pci_get_drvdata(pdev);
2078         struct atl1e_adapter *adapter = netdev_priv(netdev);
2079         struct atl1e_hw *hw = &adapter->hw;
2080         u32 ctrl = 0;
2081         u32 mac_ctrl_data = 0;
2082         u32 wol_ctrl_data = 0;
2083         u16 mii_advertise_data = 0;
2084         u16 mii_bmsr_data = 0;
2085         u16 mii_intr_status_data = 0;
2086         u32 wufc = adapter->wol;
2087         u32 i;
2088 #ifdef CONFIG_PM
2089         int retval = 0;
2090 #endif
2091
2092         if (netif_running(netdev)) {
2093                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2094                 atl1e_down(adapter);
2095         }
2096         netif_device_detach(netdev);
2097
2098 #ifdef CONFIG_PM
2099         retval = pci_save_state(pdev);
2100         if (retval)
2101                 return retval;
2102 #endif
2103
2104         if (wufc) {
2105                 /* get link status */
2106                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2107                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2108
2109                 mii_advertise_data = MII_AR_10T_HD_CAPS;
2110
2111                 if ((atl1e_write_phy_reg(hw, MII_AT001_CR, 0) != 0) ||
2112                     (atl1e_write_phy_reg(hw,
2113                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2114                     (atl1e_phy_commit(hw)) != 0) {
2115                         dev_dbg(&pdev->dev, "set phy register failed\n");
2116                         goto wol_dis;
2117                 }
2118
2119                 hw->phy_configured = false; /* re-init PHY when resume */
2120
2121                 /* turn on magic packet wol */
2122                 if (wufc & AT_WUFC_MAG)
2123                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2124
2125                 if (wufc & AT_WUFC_LNKC) {
2126                 /* if orignal link status is link, just wait for retrive link */
2127                         if (mii_bmsr_data & BMSR_LSTATUS) {
2128                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2129                                         msleep(100);
2130                                         atl1e_read_phy_reg(hw, MII_BMSR,
2131                                                         (u16 *)&mii_bmsr_data);
2132                                         if (mii_bmsr_data & BMSR_LSTATUS)
2133                                                 break;
2134                                 }
2135
2136                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2137                                         dev_dbg(&pdev->dev,
2138                                                 "%s: Link may change"
2139                                                 "when suspend\n",
2140                                                 atl1e_driver_name);
2141                         }
2142                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2143                         /* only link up can wake up */
2144                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2145                                 dev_dbg(&pdev->dev, "%s: read write phy "
2146                                                   "register failed.\n",
2147                                                   atl1e_driver_name);
2148                                 goto wol_dis;
2149                         }
2150                 }
2151                 /* clear phy interrupt */
2152                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2153                 /* Config MAC Ctrl register */
2154                 mac_ctrl_data = MAC_CTRL_RX_EN;
2155                 /* set to 10/100M halt duplex */
2156                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2157                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2158                                  MAC_CTRL_PRMLEN_MASK) <<
2159                                  MAC_CTRL_PRMLEN_SHIFT);
2160
2161                 if (adapter->vlgrp)
2162                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2163
2164                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2165                 if (wufc & AT_WUFC_MAG)
2166                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2167
2168                 dev_dbg(&pdev->dev,
2169                         "%s: suspend MAC=0x%x\n",
2170                         atl1e_driver_name, mac_ctrl_data);
2171
2172                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2173                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2174                 /* pcie patch */
2175                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2176                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2177                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2178                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2179                 goto suspend_exit;
2180         }
2181 wol_dis:
2182
2183         /* WOL disabled */
2184         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2185
2186         /* pcie patch */
2187         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2188         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2189         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2190
2191         atl1e_force_ps(hw);
2192         hw->phy_configured = false; /* re-init PHY when resume */
2193
2194         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2195
2196 suspend_exit:
2197
2198         if (netif_running(netdev))
2199                 atl1e_free_irq(adapter);
2200
2201         pci_disable_device(pdev);
2202
2203         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2204
2205         return 0;
2206 }
2207
2208 #ifdef CONFIG_PM
2209 static int atl1e_resume(struct pci_dev *pdev)
2210 {
2211         struct net_device *netdev = pci_get_drvdata(pdev);
2212         struct atl1e_adapter *adapter = netdev_priv(netdev);
2213         u32 err;
2214
2215         pci_set_power_state(pdev, PCI_D0);
2216         pci_restore_state(pdev);
2217
2218         err = pci_enable_device(pdev);
2219         if (err) {
2220                 dev_err(&pdev->dev, "ATL1e: Cannot enable PCI"
2221                                 " device from suspend\n");
2222                 return err;
2223         }
2224
2225         pci_set_master(pdev);
2226
2227         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2228
2229         pci_enable_wake(pdev, PCI_D3hot, 0);
2230         pci_enable_wake(pdev, PCI_D3cold, 0);
2231
2232         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2233
2234         if (netif_running(netdev)) {
2235                 err = atl1e_request_irq(adapter);
2236                 if (err)
2237                         return err;
2238         }
2239
2240         atl1e_reset_hw(&adapter->hw);
2241
2242         if (netif_running(netdev))
2243                 atl1e_up(adapter);
2244
2245         netif_device_attach(netdev);
2246
2247         return 0;
2248 }
2249 #endif
2250
2251 static void atl1e_shutdown(struct pci_dev *pdev)
2252 {
2253         atl1e_suspend(pdev, PMSG_SUSPEND);
2254 }
2255
2256 static const struct net_device_ops atl1e_netdev_ops = {
2257         .ndo_open               = atl1e_open,
2258         .ndo_stop               = atl1e_close,
2259         .ndo_start_xmit         = atl1e_xmit_frame,
2260         .ndo_get_stats          = atl1e_get_stats,
2261         .ndo_set_multicast_list = atl1e_set_multi,
2262         .ndo_validate_addr      = eth_validate_addr,
2263         .ndo_set_mac_address    = atl1e_set_mac_addr,
2264         .ndo_change_mtu         = atl1e_change_mtu,
2265         .ndo_do_ioctl           = atl1e_ioctl,
2266         .ndo_tx_timeout         = atl1e_tx_timeout,
2267         .ndo_vlan_rx_register   = atl1e_vlan_rx_register,
2268 #ifdef CONFIG_NET_POLL_CONTROLLER
2269         .ndo_poll_controller    = atl1e_netpoll,
2270 #endif
2271
2272 };
2273
2274 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2275 {
2276         SET_NETDEV_DEV(netdev, &pdev->dev);
2277         pci_set_drvdata(pdev, netdev);
2278
2279         netdev->irq  = pdev->irq;
2280         netdev->netdev_ops = &atl1e_netdev_ops;
2281
2282         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2283         atl1e_set_ethtool_ops(netdev);
2284
2285         netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM |
2286                 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2287         netdev->features |= NETIF_F_LLTX;
2288         netdev->features |= NETIF_F_TSO;
2289         netdev->features |= NETIF_F_TSO6;
2290
2291         return 0;
2292 }
2293
2294 /*
2295  * atl1e_probe - Device Initialization Routine
2296  * @pdev: PCI device information struct
2297  * @ent: entry in atl1e_pci_tbl
2298  *
2299  * Returns 0 on success, negative on failure
2300  *
2301  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2302  * The OS initialization, configuring of the adapter private structure,
2303  * and a hardware reset occur.
2304  */
2305 static int __devinit atl1e_probe(struct pci_dev *pdev,
2306                                  const struct pci_device_id *ent)
2307 {
2308         struct net_device *netdev;
2309         struct atl1e_adapter *adapter = NULL;
2310         static int cards_found;
2311
2312         int err = 0;
2313
2314         err = pci_enable_device(pdev);
2315         if (err) {
2316                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2317                 return err;
2318         }
2319
2320         /*
2321          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2322          * shared register for the high 32 bits, so only a single, aligned,
2323          * 4 GB physical address range can be used at a time.
2324          *
2325          * Supporting 64-bit DMA on this hardware is more trouble than it's
2326          * worth.  It is far easier to limit to 32-bit DMA than update
2327          * various kernel subsystems to support the mechanics required by a
2328          * fixed-high-32-bit system.
2329          */
2330         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2331             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2332                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2333                 goto err_dma;
2334         }
2335
2336         err = pci_request_regions(pdev, atl1e_driver_name);
2337         if (err) {
2338                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2339                 goto err_pci_reg;
2340         }
2341
2342         pci_set_master(pdev);
2343
2344         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2345         if (netdev == NULL) {
2346                 err = -ENOMEM;
2347                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2348                 goto err_alloc_etherdev;
2349         }
2350
2351         err = atl1e_init_netdev(netdev, pdev);
2352         if (err) {
2353                 dev_err(&pdev->dev, "init netdevice failed\n");
2354                 goto err_init_netdev;
2355         }
2356         adapter = netdev_priv(netdev);
2357         adapter->bd_number = cards_found;
2358         adapter->netdev = netdev;
2359         adapter->pdev = pdev;
2360         adapter->hw.adapter = adapter;
2361         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2362         if (!adapter->hw.hw_addr) {
2363                 err = -EIO;
2364                 dev_err(&pdev->dev, "cannot map device registers\n");
2365                 goto err_ioremap;
2366         }
2367         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2368
2369         /* init mii data */
2370         adapter->mii.dev = netdev;
2371         adapter->mii.mdio_read  = atl1e_mdio_read;
2372         adapter->mii.mdio_write = atl1e_mdio_write;
2373         adapter->mii.phy_id_mask = 0x1f;
2374         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2375
2376         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2377
2378         init_timer(&adapter->phy_config_timer);
2379         adapter->phy_config_timer.function = &atl1e_phy_config;
2380         adapter->phy_config_timer.data = (unsigned long) adapter;
2381
2382         /* get user settings */
2383         atl1e_check_options(adapter);
2384         /*
2385          * Mark all PCI regions associated with PCI device
2386          * pdev as being reserved by owner atl1e_driver_name
2387          * Enables bus-mastering on the device and calls
2388          * pcibios_set_master to do the needed arch specific settings
2389          */
2390         atl1e_setup_pcicmd(pdev);
2391         /* setup the private structure */
2392         err = atl1e_sw_init(adapter);
2393         if (err) {
2394                 dev_err(&pdev->dev, "net device private data init failed\n");
2395                 goto err_sw_init;
2396         }
2397
2398         /* Init GPHY as early as possible due to power saving issue  */
2399         atl1e_phy_init(&adapter->hw);
2400         /* reset the controller to
2401          * put the device in a known good starting state */
2402         err = atl1e_reset_hw(&adapter->hw);
2403         if (err) {
2404                 err = -EIO;
2405                 goto err_reset;
2406         }
2407
2408         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2409                 err = -EIO;
2410                 dev_err(&pdev->dev, "get mac address failed\n");
2411                 goto err_eeprom;
2412         }
2413
2414         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2415         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2416         dev_dbg(&pdev->dev, "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2417                         adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2418                         adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2419                         adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2420
2421         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2422         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2423         err = register_netdev(netdev);
2424         if (err) {
2425                 dev_err(&pdev->dev, "register netdevice failed\n");
2426                 goto err_register;
2427         }
2428
2429         /* assume we have no link for now */
2430         netif_stop_queue(netdev);
2431         netif_carrier_off(netdev);
2432
2433         cards_found++;
2434
2435         return 0;
2436
2437 err_reset:
2438 err_register:
2439 err_sw_init:
2440 err_eeprom:
2441         iounmap(adapter->hw.hw_addr);
2442 err_init_netdev:
2443 err_ioremap:
2444         free_netdev(netdev);
2445 err_alloc_etherdev:
2446         pci_release_regions(pdev);
2447 err_pci_reg:
2448 err_dma:
2449         pci_disable_device(pdev);
2450         return err;
2451 }
2452
2453 /*
2454  * atl1e_remove - Device Removal Routine
2455  * @pdev: PCI device information struct
2456  *
2457  * atl1e_remove is called by the PCI subsystem to alert the driver
2458  * that it should release a PCI device.  The could be caused by a
2459  * Hot-Plug event, or because the driver is going to be removed from
2460  * memory.
2461  */
2462 static void __devexit atl1e_remove(struct pci_dev *pdev)
2463 {
2464         struct net_device *netdev = pci_get_drvdata(pdev);
2465         struct atl1e_adapter *adapter = netdev_priv(netdev);
2466
2467         /*
2468          * flush_scheduled work may reschedule our watchdog task, so
2469          * explicitly disable watchdog tasks from being rescheduled
2470          */
2471         set_bit(__AT_DOWN, &adapter->flags);
2472
2473         atl1e_del_timer(adapter);
2474         atl1e_cancel_work(adapter);
2475
2476         unregister_netdev(netdev);
2477         atl1e_free_ring_resources(adapter);
2478         atl1e_force_ps(&adapter->hw);
2479         iounmap(adapter->hw.hw_addr);
2480         pci_release_regions(pdev);
2481         free_netdev(netdev);
2482         pci_disable_device(pdev);
2483 }
2484
2485 /*
2486  * atl1e_io_error_detected - called when PCI error is detected
2487  * @pdev: Pointer to PCI device
2488  * @state: The current pci connection state
2489  *
2490  * This function is called after a PCI bus error affecting
2491  * this device has been detected.
2492  */
2493 static pci_ers_result_t
2494 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2495 {
2496         struct net_device *netdev = pci_get_drvdata(pdev);
2497         struct atl1e_adapter *adapter = netdev_priv(netdev);
2498
2499         netif_device_detach(netdev);
2500
2501         if (netif_running(netdev))
2502                 atl1e_down(adapter);
2503
2504         pci_disable_device(pdev);
2505
2506         /* Request a slot slot reset. */
2507         return PCI_ERS_RESULT_NEED_RESET;
2508 }
2509
2510 /*
2511  * atl1e_io_slot_reset - called after the pci bus has been reset.
2512  * @pdev: Pointer to PCI device
2513  *
2514  * Restart the card from scratch, as if from a cold-boot. Implementation
2515  * resembles the first-half of the e1000_resume routine.
2516  */
2517 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2518 {
2519         struct net_device *netdev = pci_get_drvdata(pdev);
2520         struct atl1e_adapter *adapter = netdev_priv(netdev);
2521
2522         if (pci_enable_device(pdev)) {
2523                 dev_err(&pdev->dev,
2524                        "ATL1e: Cannot re-enable PCI device after reset.\n");
2525                 return PCI_ERS_RESULT_DISCONNECT;
2526         }
2527         pci_set_master(pdev);
2528
2529         pci_enable_wake(pdev, PCI_D3hot, 0);
2530         pci_enable_wake(pdev, PCI_D3cold, 0);
2531
2532         atl1e_reset_hw(&adapter->hw);
2533
2534         return PCI_ERS_RESULT_RECOVERED;
2535 }
2536
2537 /*
2538  * atl1e_io_resume - called when traffic can start flowing again.
2539  * @pdev: Pointer to PCI device
2540  *
2541  * This callback is called when the error recovery driver tells us that
2542  * its OK to resume normal operation. Implementation resembles the
2543  * second-half of the atl1e_resume routine.
2544  */
2545 static void atl1e_io_resume(struct pci_dev *pdev)
2546 {
2547         struct net_device *netdev = pci_get_drvdata(pdev);
2548         struct atl1e_adapter *adapter = netdev_priv(netdev);
2549
2550         if (netif_running(netdev)) {
2551                 if (atl1e_up(adapter)) {
2552                         dev_err(&pdev->dev,
2553                           "ATL1e: can't bring device back up after reset\n");
2554                         return;
2555                 }
2556         }
2557
2558         netif_device_attach(netdev);
2559 }
2560
2561 static struct pci_error_handlers atl1e_err_handler = {
2562         .error_detected = atl1e_io_error_detected,
2563         .slot_reset = atl1e_io_slot_reset,
2564         .resume = atl1e_io_resume,
2565 };
2566
2567 static struct pci_driver atl1e_driver = {
2568         .name     = atl1e_driver_name,
2569         .id_table = atl1e_pci_tbl,
2570         .probe    = atl1e_probe,
2571         .remove   = __devexit_p(atl1e_remove),
2572         /* Power Managment Hooks */
2573 #ifdef CONFIG_PM
2574         .suspend  = atl1e_suspend,
2575         .resume   = atl1e_resume,
2576 #endif
2577         .shutdown = atl1e_shutdown,
2578         .err_handler = &atl1e_err_handler
2579 };
2580
2581 /*
2582  * atl1e_init_module - Driver Registration Routine
2583  *
2584  * atl1e_init_module is the first routine called when the driver is
2585  * loaded. All it does is register with the PCI subsystem.
2586  */
2587 static int __init atl1e_init_module(void)
2588 {
2589         return pci_register_driver(&atl1e_driver);
2590 }
2591
2592 /*
2593  * atl1e_exit_module - Driver Exit Cleanup Routine
2594  *
2595  * atl1e_exit_module is called just before the driver is removed
2596  * from memory.
2597  */
2598 static void __exit atl1e_exit_module(void)
2599 {
2600         pci_unregister_driver(&atl1e_driver);
2601 }
2602
2603 module_init(atl1e_init_module);
2604 module_exit(atl1e_exit_module);