drivers/net/atl1c/atl1c_main.c

   1 /*
   2  * Copyright(c) 2008 - 2009 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 "atl1c.h"
  23
  24 #define ATL1C_DRV_VERSION "1.0.0.1-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27 #define PCI_DEVICE_ID_ATTANSIC_L2C      0x1062
  28 #define PCI_DEVICE_ID_ATTANSIC_L1C      0x1063
  29 /*
  30  * atl1c_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 atl1c_pci_tbl[] = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  45
  46 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(ATL1C_DRV_VERSION);
  50
  51 static int atl1c_stop_mac(struct atl1c_hw *hw);
  52 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
  53 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
  54 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  55 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
  56 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
  57 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
  58                    int *work_done, int work_to_do);
  59
  60 static const u16 atl1c_pay_load_size[] = {
  61         128, 256, 512, 1024, 2048, 4096,
  62 };
  63
  64 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
  65 {
  66         REG_MB_RFD0_PROD_IDX,
  67         REG_MB_RFD1_PROD_IDX,
  68         REG_MB_RFD2_PROD_IDX,
  69         REG_MB_RFD3_PROD_IDX
  70 };
  71
  72 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  73 {
  74         REG_RFD0_HEAD_ADDR_LO,
  75         REG_RFD1_HEAD_ADDR_LO,
  76         REG_RFD2_HEAD_ADDR_LO,
  77         REG_RFD3_HEAD_ADDR_LO
  78 };
  79
  80 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  81 {
  82         REG_RRD0_HEAD_ADDR_LO,
  83         REG_RRD1_HEAD_ADDR_LO,
  84         REG_RRD2_HEAD_ADDR_LO,
  85         REG_RRD3_HEAD_ADDR_LO
  86 };
  87
  88 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  89         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  90
  91 /*
  92  * atl1c_init_pcie - init PCIE module
  93  */
  94 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
  95 {
  96         u32 data;
  97         u32 pci_cmd;
  98         struct pci_dev *pdev = hw->adapter->pdev;
  99
 100         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 101         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 102         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 103                 PCI_COMMAND_IO);
 104         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 105
 106         /*
 107          * Clear any PowerSaveing Settings
 108          */
 109         pci_enable_wake(pdev, PCI_D3hot, 0);
 110         pci_enable_wake(pdev, PCI_D3cold, 0);
 111
 112         /*
 113          * Mask some pcie error bits
 114          */
 115         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
 116         data &= ~PCIE_UC_SERVRITY_DLP;
 117         data &= ~PCIE_UC_SERVRITY_FCP;
 118         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
 119
 120         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 121                 atl1c_disable_l0s_l1(hw);
 122         if (flag & ATL1C_PCIE_PHY_RESET)
 123                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 124         else
 125                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 126                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 127
 128         msleep(1);
 129 }
 130
 131 /*
 132  * atl1c_irq_enable - Enable default interrupt generation settings
 133  * @adapter: board private structure
 134  */
 135 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 136 {
 137         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 138                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 139                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 140                 AT_WRITE_FLUSH(&adapter->hw);
 141         }
 142 }
 143
 144 /*
 145  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 146  * @adapter: board private structure
 147  */
 148 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 149 {
 150         atomic_inc(&adapter->irq_sem);
 151         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 152         AT_WRITE_FLUSH(&adapter->hw);
 153         synchronize_irq(adapter->pdev->irq);
 154 }
 155
 156 /*
 157  * atl1c_irq_reset - reset interrupt confiure on the NIC
 158  * @adapter: board private structure
 159  */
 160 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 161 {
 162         atomic_set(&adapter->irq_sem, 1);
 163         atl1c_irq_enable(adapter);
 164 }
 165
 166 /*
 167  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 168  * of the idle status register until the device is actually idle
 169  */
 170 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
 171 {
 172         int timeout;
 173         u32 data;
 174
 175         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 176                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 177                 if ((data & IDLE_STATUS_MASK) == 0)
 178                         return 0;
 179                 msleep(1);
 180         }
 181         return data;
 182 }
 183
 184 /*
 185  * atl1c_phy_config - Timer Call-back
 186  * @data: pointer to netdev cast into an unsigned long
 187  */
 188 static void atl1c_phy_config(unsigned long data)
 189 {
 190         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 191         struct atl1c_hw *hw = &adapter->hw;
 192         unsigned long flags;
 193
 194         spin_lock_irqsave(&adapter->mdio_lock, flags);
 195         atl1c_restart_autoneg(hw);
 196         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 197 }
 198
 199 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 200 {
 201
 202         WARN_ON(in_interrupt());
 203         atl1c_down(adapter);
 204         atl1c_up(adapter);
 205         clear_bit(__AT_RESETTING, &adapter->flags);
 206 }
 207
 208 static void atl1c_reset_task(struct work_struct *work)
 209 {
 210         struct atl1c_adapter *adapter;
 211         struct net_device *netdev;
 212
 213         adapter = container_of(work, struct atl1c_adapter, reset_task);
 214         netdev = adapter->netdev;
 215
 216         netif_device_detach(netdev);
 217         atl1c_down(adapter);
 218         atl1c_up(adapter);
 219         netif_device_attach(netdev);
 220 }
 221
 222 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 223 {
 224         struct atl1c_hw *hw = &adapter->hw;
 225         struct net_device *netdev = adapter->netdev;
 226         struct pci_dev    *pdev   = adapter->pdev;
 227         int err;
 228         unsigned long flags;
 229         u16 speed, duplex, phy_data;
 230
 231         spin_lock_irqsave(&adapter->mdio_lock, flags);
 232         /* MII_BMSR must read twise */
 233         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 234         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 235         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 236
 237         if ((phy_data & BMSR_LSTATUS) == 0) {
 238                 /* link down */
 239                 if (netif_carrier_ok(netdev)) {
 240                         hw->hibernate = true;
 241                         if (atl1c_stop_mac(hw) != 0)
 242                                 if (netif_msg_hw(adapter))
 243                                         dev_warn(&pdev->dev,
 244                                                 "stop mac failed\n");
 245                         atl1c_set_aspm(hw, false);
 246                 }
 247                 netif_carrier_off(netdev);
 248         } else {
 249                 /* Link Up */
 250                 hw->hibernate = false;
 251                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 252                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 253                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 254                 if (unlikely(err))
 255                         return;
 256                 /* link result is our setting */
 257                 if (adapter->link_speed != speed ||
 258                     adapter->link_duplex != duplex) {
 259                         adapter->link_speed  = speed;
 260                         adapter->link_duplex = duplex;
 261                         atl1c_set_aspm(hw, true);
 262                         atl1c_enable_tx_ctrl(hw);
 263                         atl1c_enable_rx_ctrl(hw);
 264                         atl1c_setup_mac_ctrl(adapter);
 265                         if (netif_msg_link(adapter))
 266                                 dev_info(&pdev->dev,
 267                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 268                                         atl1c_driver_name, netdev->name,
 269                                         adapter->link_speed,
 270                                         adapter->link_duplex == FULL_DUPLEX ?
 271                                         "Full Duplex" : "Half Duplex");
 272                 }
 273                 if (!netif_carrier_ok(netdev))
 274                         netif_carrier_on(netdev);
 275         }
 276 }
 277
 278 /*
 279  * atl1c_link_chg_task - deal with link change event Out of interrupt context
 280  * @netdev: network interface device structure
 281  */
 282 static void atl1c_link_chg_task(struct work_struct *work)
 283 {
 284         struct atl1c_adapter *adapter;
 285
 286         adapter = container_of(work, struct atl1c_adapter, link_chg_task);
 287         atl1c_check_link_status(adapter);
 288 }
 289
 290 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 291 {
 292         struct net_device *netdev = adapter->netdev;
 293         struct pci_dev    *pdev   = adapter->pdev;
 294         u16 phy_data;
 295         u16 link_up;
 296
 297         spin_lock(&adapter->mdio_lock);
 298         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 299         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 300         spin_unlock(&adapter->mdio_lock);
 301         link_up = phy_data & BMSR_LSTATUS;
 302         /* notify upper layer link down ASAP */
 303         if (!link_up) {
 304                 if (netif_carrier_ok(netdev)) {
 305                         /* old link state: Up */
 306                         netif_carrier_off(netdev);
 307                         if (netif_msg_link(adapter))
 308                                 dev_info(&pdev->dev,
 309                                         "%s: %s NIC Link is Down\n",
 310                                         atl1c_driver_name, netdev->name);
 311                         adapter->link_speed = SPEED_0;
 312                 }
 313         }
 314         schedule_work(&adapter->link_chg_task);
 315 }
 316
 317 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 318 {
 319         del_timer_sync(&adapter->phy_config_timer);
 320 }
 321
 322 static void atl1c_cancel_work(struct atl1c_adapter *adapter)
 323 {
 324         cancel_work_sync(&adapter->reset_task);
 325         cancel_work_sync(&adapter->link_chg_task);
 326 }
 327
 328 /*
 329  * atl1c_tx_timeout - Respond to a Tx Hang
 330  * @netdev: network interface device structure
 331  */
 332 static void atl1c_tx_timeout(struct net_device *netdev)
 333 {
 334         struct atl1c_adapter *adapter = netdev_priv(netdev);
 335
 336         /* Do the reset outside of interrupt context */
 337         schedule_work(&adapter->reset_task);
 338 }
 339
 340 /*
 341  * atl1c_set_multi - Multicast and Promiscuous mode set
 342  * @netdev: network interface device structure
 343  *
 344  * The set_multi entry point is called whenever the multicast address
 345  * list or the network interface flags are updated.  This routine is
 346  * responsible for configuring the hardware for proper multicast,
 347  * promiscuous mode, and all-multi behavior.
 348  */
 349 static void atl1c_set_multi(struct net_device *netdev)
 350 {
 351         struct atl1c_adapter *adapter = netdev_priv(netdev);
 352         struct atl1c_hw *hw = &adapter->hw;
 353         struct dev_mc_list *mc_ptr;
 354         u32 mac_ctrl_data;
 355         u32 hash_value;
 356
 357         /* Check for Promiscuous and All Multicast modes */
 358         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 359
 360         if (netdev->flags & IFF_PROMISC) {
 361                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 362         } else if (netdev->flags & IFF_ALLMULTI) {
 363                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 364                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 365         } else {
 366                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 367         }
 368
 369         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 370
 371         /* clear the old settings from the multicast hash table */
 372         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 373         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 374
 375         /* comoute mc addresses' hash value ,and put it into hash table */
 376         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 377                 hash_value = atl1c_hash_mc_addr(hw, mc_ptr->dmi_addr);
 378                 atl1c_hash_set(hw, hash_value);
 379         }
 380 }
 381
 382 static void atl1c_vlan_rx_register(struct net_device *netdev,
 383                                    struct vlan_group *grp)
 384 {
 385         struct atl1c_adapter *adapter = netdev_priv(netdev);
 386         struct pci_dev *pdev = adapter->pdev;
 387         u32 mac_ctrl_data = 0;
 388
 389         if (netif_msg_pktdata(adapter))
 390                 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
 391
 392         atl1c_irq_disable(adapter);
 393
 394         adapter->vlgrp = grp;
 395         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 396
 397         if (grp) {
 398                 /* enable VLAN tag insert/strip */
 399                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 400         } else {
 401                 /* disable VLAN tag insert/strip */
 402                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 403         }
 404
 405         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 406         atl1c_irq_enable(adapter);
 407 }
 408
 409 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 410 {
 411         struct pci_dev *pdev = adapter->pdev;
 412
 413         if (netif_msg_pktdata(adapter))
 414                 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
 415         atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 416 }
 417 /*
 418  * atl1c_set_mac - Change the Ethernet Address of the NIC
 419  * @netdev: network interface device structure
 420  * @p: pointer to an address structure
 421  *
 422  * Returns 0 on success, negative on failure
 423  */
 424 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 425 {
 426         struct atl1c_adapter *adapter = netdev_priv(netdev);
 427         struct sockaddr *addr = p;
 428
 429         if (!is_valid_ether_addr(addr->sa_data))
 430                 return -EADDRNOTAVAIL;
 431
 432         if (netif_running(netdev))
 433                 return -EBUSY;
 434
 435         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 436         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 437
 438         atl1c_hw_set_mac_addr(&adapter->hw);
 439
 440         return 0;
 441 }
 442
 443 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 444                                 struct net_device *dev)
 445 {
 446         int mtu = dev->mtu;
 447
 448         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 449                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 450 }
 451 /*
 452  * atl1c_change_mtu - Change the Maximum Transfer Unit
 453  * @netdev: network interface device structure
 454  * @new_mtu: new value for maximum frame size
 455  *
 456  * Returns 0 on success, negative on failure
 457  */
 458 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 459 {
 460         struct atl1c_adapter *adapter = netdev_priv(netdev);
 461         int old_mtu   = netdev->mtu;
 462         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 463
 464         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 465                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 466                 if (netif_msg_link(adapter))
 467                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 468                 return -EINVAL;
 469         }
 470         /* set MTU */
 471         if (old_mtu != new_mtu && netif_running(netdev)) {
 472                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 473                         msleep(1);
 474                 netdev->mtu = new_mtu;
 475                 adapter->hw.max_frame_size = new_mtu;
 476                 atl1c_set_rxbufsize(adapter, netdev);
 477                 atl1c_down(adapter);
 478                 atl1c_up(adapter);
 479                 clear_bit(__AT_RESETTING, &adapter->flags);
 480                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 481                         u32 phy_data;
 482
 483                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 484                         phy_data |= 0x10000000;
 485                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 486                 }
 487
 488         }
 489         return 0;
 490 }
 491
 492 /*
 493  *  caller should hold mdio_lock
 494  */
 495 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 496 {
 497         struct atl1c_adapter *adapter = netdev_priv(netdev);
 498         u16 result;
 499
 500         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 501         return result;
 502 }
 503
 504 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 505                              int reg_num, int val)
 506 {
 507         struct atl1c_adapter *adapter = netdev_priv(netdev);
 508
 509         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 510 }
 511
 512 /*
 513  * atl1c_mii_ioctl -
 514  * @netdev:
 515  * @ifreq:
 516  * @cmd:
 517  */
 518 static int atl1c_mii_ioctl(struct net_device *netdev,
 519                            struct ifreq *ifr, int cmd)
 520 {
 521         struct atl1c_adapter *adapter = netdev_priv(netdev);
 522         struct pci_dev *pdev = adapter->pdev;
 523         struct mii_ioctl_data *data = if_mii(ifr);
 524         unsigned long flags;
 525         int retval = 0;
 526
 527         if (!netif_running(netdev))
 528                 return -EINVAL;
 529
 530         spin_lock_irqsave(&adapter->mdio_lock, flags);
 531         switch (cmd) {
 532         case SIOCGMIIPHY:
 533                 data->phy_id = 0;
 534                 break;
 535
 536         case SIOCGMIIREG:
 537                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 538                                     &data->val_out)) {
 539                         retval = -EIO;
 540                         goto out;
 541                 }
 542                 break;
 543
 544         case SIOCSMIIREG:
 545                 if (data->reg_num & ~(0x1F)) {
 546                         retval = -EFAULT;
 547                         goto out;
 548                 }
 549
 550                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 551                                 data->reg_num, data->val_in);
 552                 if (atl1c_write_phy_reg(&adapter->hw,
 553                                      data->reg_num, data->val_in)) {
 554                         retval = -EIO;
 555                         goto out;
 556                 }
 557                 break;
 558
 559         default:
 560                 retval = -EOPNOTSUPP;
 561                 break;
 562         }
 563 out:
 564         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 565         return retval;
 566 }
 567
 568 /*
 569  * atl1c_ioctl -
 570  * @netdev:
 571  * @ifreq:
 572  * @cmd:
 573  */
 574 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 575 {
 576         switch (cmd) {
 577         case SIOCGMIIPHY:
 578         case SIOCGMIIREG:
 579         case SIOCSMIIREG:
 580                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 581         default:
 582                 return -EOPNOTSUPP;
 583         }
 584 }
 585
 586 /*
 587  * atl1c_alloc_queues - Allocate memory for all rings
 588  * @adapter: board private structure to initialize
 589  *
 590  */
 591 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 592 {
 593         return 0;
 594 }
 595
 596 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 597 {
 598         switch (hw->device_id) {
 599         case PCI_DEVICE_ID_ATTANSIC_L2C:
 600                 hw->nic_type = athr_l2c;
 601                 break;
 602
 603         case PCI_DEVICE_ID_ATTANSIC_L1C:
 604                 hw->nic_type = athr_l1c;
 605                 break;
 606
 607         default:
 608                 break;
 609         }
 610 }
 611
 612 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 613 {
 614         u32 phy_status_data;
 615         u32 link_ctrl_data;
 616
 617         atl1c_set_mac_type(hw);
 618         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 619         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 620
 621         hw->ctrl_flags = ATL1C_INTR_CLEAR_ON_READ |
 622                          ATL1C_INTR_MODRT_ENABLE  |
 623                          ATL1C_RX_IPV6_CHKSUM     |
 624                          ATL1C_TXQ_MODE_ENHANCE;
 625         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 626                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 627         if (link_ctrl_data & LINK_CTRL_L1_EN)
 628                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 629
 630         if (hw->nic_type == athr_l1c) {
 631                 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 632                 hw->ctrl_flags |= ATL1C_LINK_CAP_1000M;
 633         }
 634         return 0;
 635 }
 636 /*
 637  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 638  * @adapter: board private structure to initialize
 639  *
 640  * atl1c_sw_init initializes the Adapter private data structure.
 641  * Fields are initialized based on PCI device information and
 642  * OS network device settings (MTU size).
 643  */
 644 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 645 {
 646         struct atl1c_hw *hw   = &adapter->hw;
 647         struct pci_dev  *pdev = adapter->pdev;
 648
 649         adapter->wol = 0;
 650         adapter->link_speed = SPEED_0;
 651         adapter->link_duplex = FULL_DUPLEX;
 652         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
 653         adapter->tpd_ring[0].count = 1024;
 654         adapter->rfd_ring[0].count = 512;
 655
 656         hw->vendor_id = pdev->vendor;
 657         hw->device_id = pdev->device;
 658         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 659         hw->subsystem_id = pdev->subsystem_device;
 660
 661         /* before link up, we assume hibernate is true */
 662         hw->hibernate = true;
 663         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 664         if (atl1c_setup_mac_funcs(hw) != 0) {
 665                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 666                 return -1;
 667         }
 668         hw->intr_mask = IMR_NORMAL_MASK;
 669         hw->phy_configured = false;
 670         hw->preamble_len = 7;
 671         hw->max_frame_size = adapter->netdev->mtu;
 672         if (adapter->num_rx_queues < 2) {
 673                 hw->rss_type = atl1c_rss_disable;
 674                 hw->rss_mode = atl1c_rss_mode_disable;
 675         } else {
 676                 hw->rss_type = atl1c_rss_ipv4;
 677                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
 678                 hw->rss_hash_bits = 16;
 679         }
 680         hw->autoneg_advertised = ADVERTISED_Autoneg;
 681         hw->indirect_tab = 0xE4E4E4E4;
 682         hw->base_cpu = 0;
 683
 684         hw->ict = 50000;                /* 100ms */
 685         hw->smb_timer = 200000;         /* 400ms */
 686         hw->cmb_tpd = 4;
 687         hw->cmb_tx_timer = 1;           /* 2 us  */
 688         hw->rx_imt = 200;
 689         hw->tx_imt = 1000;
 690
 691         hw->tpd_burst = 5;
 692         hw->rfd_burst = 8;
 693         hw->dma_order = atl1c_dma_ord_out;
 694         hw->dmar_block = atl1c_dma_req_1024;
 695         hw->dmaw_block = atl1c_dma_req_1024;
 696         hw->dmar_dly_cnt = 15;
 697         hw->dmaw_dly_cnt = 4;
 698
 699         if (atl1c_alloc_queues(adapter)) {
 700                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 701                 return -ENOMEM;
 702         }
 703         /* TODO */
 704         atl1c_set_rxbufsize(adapter, adapter->netdev);
 705         atomic_set(&adapter->irq_sem, 1);
 706         spin_lock_init(&adapter->mdio_lock);
 707         spin_lock_init(&adapter->tx_lock);
 708         set_bit(__AT_DOWN, &adapter->flags);
 709
 710         return 0;
 711 }
 712
 713 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 714                                 struct atl1c_buffer *buffer_info, int in_irq)
 715 {
 716         u16 pci_driection;
 717         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 718                 return;
 719         if (buffer_info->dma) {
 720                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 721                         pci_driection = PCI_DMA_FROMDEVICE;
 722                 else
 723                         pci_driection = PCI_DMA_TODEVICE;
 724
 725                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 726                         pci_unmap_single(pdev, buffer_info->dma,
 727                                         buffer_info->length, pci_driection);
 728                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 729                         pci_unmap_page(pdev, buffer_info->dma,
 730                                         buffer_info->length, pci_driection);
 731         }
 732         if (buffer_info->skb) {
 733                 if (in_irq)
 734                         dev_kfree_skb_irq(buffer_info->skb);
 735                 else
 736                         dev_kfree_skb(buffer_info->skb);
 737         }
 738         buffer_info->dma = 0;
 739         buffer_info->skb = NULL;
 740         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 741 }
 742 /*
 743  * atl1c_clean_tx_ring - Free Tx-skb
 744  * @adapter: board private structure
 745  */
 746 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 747                                 enum atl1c_trans_queue type)
 748 {
 749         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 750         struct atl1c_buffer *buffer_info;
 751         struct pci_dev *pdev = adapter->pdev;
 752         u16 index, ring_count;
 753
 754         ring_count = tpd_ring->count;
 755         for (index = 0; index < ring_count; index++) {
 756                 buffer_info = &tpd_ring->buffer_info[index];
 757                 atl1c_clean_buffer(pdev, buffer_info, 0);
 758         }
 759
 760         /* Zero out Tx-buffers */
 761         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 762                 ring_count);
 763         atomic_set(&tpd_ring->next_to_clean, 0);
 764         tpd_ring->next_to_use = 0;
 765 }
 766
 767 /*
 768  * atl1c_clean_rx_ring - Free rx-reservation skbs
 769  * @adapter: board private structure
 770  */
 771 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 772 {
 773         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 774         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 775         struct atl1c_buffer *buffer_info;
 776         struct pci_dev *pdev = adapter->pdev;
 777         int i, j;
 778
 779         for (i = 0; i < adapter->num_rx_queues; i++) {
 780                 for (j = 0; j < rfd_ring[i].count; j++) {
 781                         buffer_info = &rfd_ring[i].buffer_info[j];
 782                         atl1c_clean_buffer(pdev, buffer_info, 0);
 783                 }
 784                 /* zero out the descriptor ring */
 785                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
 786                 rfd_ring[i].next_to_clean = 0;
 787                 rfd_ring[i].next_to_use = 0;
 788                 rrd_ring[i].next_to_use = 0;
 789                 rrd_ring[i].next_to_clean = 0;
 790         }
 791 }
 792
 793 /*
 794  * Read / Write Ptr Initialize:
 795  */
 796 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 797 {
 798         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 799         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 800         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 801         struct atl1c_buffer *buffer_info;
 802         int i, j;
 803
 804         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 805                 tpd_ring[i].next_to_use = 0;
 806                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 807                 buffer_info = tpd_ring[i].buffer_info;
 808                 for (j = 0; j < tpd_ring->count; j++)
 809                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 810                                         ATL1C_BUFFER_FREE);
 811         }
 812         for (i = 0; i < adapter->num_rx_queues; i++) {
 813                 rfd_ring[i].next_to_use = 0;
 814                 rfd_ring[i].next_to_clean = 0;
 815                 rrd_ring[i].next_to_use = 0;
 816                 rrd_ring[i].next_to_clean = 0;
 817                 for (j = 0; j < rfd_ring[i].count; j++) {
 818                         buffer_info = &rfd_ring[i].buffer_info[j];
 819                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 820                 }
 821         }
 822 }
 823
 824 /*
 825  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 826  * @adapter: board private structure
 827  *
 828  * Free all transmit software resources
 829  */
 830 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 831 {
 832         struct pci_dev *pdev = adapter->pdev;
 833
 834         pci_free_consistent(pdev, adapter->ring_header.size,
 835                                         adapter->ring_header.desc,
 836                                         adapter->ring_header.dma);
 837         adapter->ring_header.desc = NULL;
 838
 839         /* Note: just free tdp_ring.buffer_info,
 840         *  it contain rfd_ring.buffer_info, do not double free */
 841         if (adapter->tpd_ring[0].buffer_info) {
 842                 kfree(adapter->tpd_ring[0].buffer_info);
 843                 adapter->tpd_ring[0].buffer_info = NULL;
 844         }
 845 }
 846
 847 /*
 848  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 849  * @adapter: board private structure
 850  *
 851  * Return 0 on success, negative on failure
 852  */
 853 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 854 {
 855         struct pci_dev *pdev = adapter->pdev;
 856         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 857         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 858         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 859         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 860         int num_rx_queues = adapter->num_rx_queues;
 861         int size;
 862         int i;
 863         int count = 0;
 864         int rx_desc_count = 0;
 865         u32 offset = 0;
 866
 867         rrd_ring[0].count = rfd_ring[0].count;
 868         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 869                 tpd_ring[i].count = tpd_ring[0].count;
 870
 871         for (i = 1; i < adapter->num_rx_queues; i++)
 872                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
 873
 874         /* 2 tpd queue, one high priority queue,
 875          * another normal priority queue */
 876         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 877                 rfd_ring->count * num_rx_queues);
 878         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 879         if (unlikely(!tpd_ring->buffer_info)) {
 880                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 881                         size);
 882                 goto err_nomem;
 883         }
 884         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 885                 tpd_ring[i].buffer_info =
 886                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 887                 count += tpd_ring[i].count;
 888         }
 889
 890         for (i = 0; i < num_rx_queues; i++) {
 891                 rfd_ring[i].buffer_info =
 892                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 893                 count += rfd_ring[i].count;
 894                 rx_desc_count += rfd_ring[i].count;
 895         }
 896         /*
 897          * real ring DMA buffer
 898          * each ring/block may need up to 8 bytes for alignment, hence the
 899          * additional bytes tacked onto the end.
 900          */
 901         ring_header->size = size =
 902                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 903                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 904                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 905                 sizeof(struct atl1c_hw_stats) +
 906                 8 * 4 + 8 * 2 * num_rx_queues;
 907
 908         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 909                                 &ring_header->dma);
 910         if (unlikely(!ring_header->desc)) {
 911                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 912                 goto err_nomem;
 913         }
 914         memset(ring_header->desc, 0, ring_header->size);
 915         /* init TPD ring */
 916
 917         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 918         offset = tpd_ring[0].dma - ring_header->dma;
 919         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 920                 tpd_ring[i].dma = ring_header->dma + offset;
 921                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 922                 tpd_ring[i].size =
 923                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 924                 offset += roundup(tpd_ring[i].size, 8);
 925         }
 926         /* init RFD ring */
 927         for (i = 0; i < num_rx_queues; i++) {
 928                 rfd_ring[i].dma = ring_header->dma + offset;
 929                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
 930                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
 931                                 rfd_ring[i].count;
 932                 offset += roundup(rfd_ring[i].size, 8);
 933         }
 934
 935         /* init RRD ring */
 936         for (i = 0; i < num_rx_queues; i++) {
 937                 rrd_ring[i].dma = ring_header->dma + offset;
 938                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
 939                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
 940                                 rrd_ring[i].count;
 941                 offset += roundup(rrd_ring[i].size, 8);
 942         }
 943
 944         adapter->smb.dma = ring_header->dma + offset;
 945         adapter->smb.smb = (u8 *)ring_header->desc + offset;
 946         return 0;
 947
 948 err_nomem:
 949         kfree(tpd_ring->buffer_info);
 950         return -ENOMEM;
 951 }
 952
 953 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
 954 {
 955         struct atl1c_hw *hw = &adapter->hw;
 956         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
 957                                 adapter->rfd_ring;
 958         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
 959                                 adapter->rrd_ring;
 960         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
 961                                 adapter->tpd_ring;
 962         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
 963         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
 964         int i;
 965
 966         /* TPD */
 967         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
 968                         (u32)((tpd_ring[atl1c_trans_normal].dma &
 969                                 AT_DMA_HI_ADDR_MASK) >> 32));
 970         /* just enable normal priority TX queue */
 971         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
 972                         (u32)(tpd_ring[atl1c_trans_normal].dma &
 973                                 AT_DMA_LO_ADDR_MASK));
 974         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
 975                         (u32)(tpd_ring[atl1c_trans_high].dma &
 976                                 AT_DMA_LO_ADDR_MASK));
 977         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
 978                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
 979
 980
 981         /* RFD */
 982         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
 983                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
 984         for (i = 0; i < adapter->num_rx_queues; i++)
 985                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
 986                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 987
 988         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
 989                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
 990         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
 991                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
 992
 993         /* RRD */
 994         for (i = 0; i < adapter->num_rx_queues; i++)
 995                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
 996                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 997         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
 998                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
 999
1000         /* CMB */
1001         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
1002
1003         /* SMB */
1004         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
1005                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1006         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
1007                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
1008         /* Load all of base address above */
1009         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1010 }
1011
1012 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1013 {
1014         struct atl1c_hw *hw = &adapter->hw;
1015         u32 dev_ctrl_data;
1016         u32 max_pay_load;
1017         u16 tx_offload_thresh;
1018         u32 txq_ctrl_data;
1019         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
1020
1021         extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1022         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1023         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1024                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1025         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1026         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1027                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1028         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
1029         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1030                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1031         hw->dmar_block = min(max_pay_load, hw->dmar_block);
1032
1033         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1034                         TXQ_NUM_TPD_BURST_SHIFT;
1035         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1036                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1037         txq_ctrl_data |= (atl1c_pay_load_size[hw->dmar_block] &
1038                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1039
1040         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1041 }
1042
1043 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1044 {
1045         struct atl1c_hw *hw = &adapter->hw;
1046         u32 rxq_ctrl_data;
1047
1048         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1049                         RXQ_RFD_BURST_NUM_SHIFT;
1050
1051         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1052                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1053         if (hw->rss_type == atl1c_rss_ipv4)
1054                 rxq_ctrl_data |= RSS_HASH_IPV4;
1055         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1056                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1057         if (hw->rss_type == atl1c_rss_ipv6)
1058                 rxq_ctrl_data |= RSS_HASH_IPV6;
1059         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1060                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1061         if (hw->rss_type != atl1c_rss_disable)
1062                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1063
1064         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1065                         RSS_MODE_SHIFT;
1066         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1067                         RSS_HASH_BITS_SHIFT;
1068         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1069                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_100M &
1070                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1071
1072         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1073 }
1074
1075 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1076 {
1077         struct atl1c_hw *hw = &adapter->hw;
1078
1079         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1080         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1081 }
1082
1083 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1084 {
1085         struct atl1c_hw *hw = &adapter->hw;
1086         u32 dma_ctrl_data;
1087
1088         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1089         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1090                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1091         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1092                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1093         else
1094                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1095
1096         switch (hw->dma_order) {
1097         case atl1c_dma_ord_in:
1098                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1099                 break;
1100         case atl1c_dma_ord_enh:
1101                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1102                 break;
1103         case atl1c_dma_ord_out:
1104                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1105                 break;
1106         default:
1107                 break;
1108         }
1109
1110         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1111                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1112         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1113                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1114         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1115                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1116         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1117                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1118
1119         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1120 }
1121
1122 /*
1123  * Stop the mac, transmit and receive units
1124  * hw - Struct containing variables accessed by shared code
1125  * return : 0  or  idle status (if error)
1126  */
1127 static int atl1c_stop_mac(struct atl1c_hw *hw)
1128 {
1129         u32 data;
1130
1131         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1132         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1133                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1134         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1135
1136         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1137         data &= ~TXQ_CTRL_EN;
1138         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1139
1140         atl1c_wait_until_idle(hw);
1141
1142         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1143         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1144         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1145
1146         return (int)atl1c_wait_until_idle(hw);
1147 }
1148
1149 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1150 {
1151         u32 data;
1152
1153         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1154         switch (hw->adapter->num_rx_queues) {
1155         case 4:
1156                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1157                 break;
1158         case 3:
1159                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1160                 break;
1161         case 2:
1162                 data |= RXQ1_CTRL_EN;
1163                 break;
1164         default:
1165                 break;
1166         }
1167         data |= RXQ_CTRL_EN;
1168         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1169 }
1170
1171 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1172 {
1173         u32 data;
1174
1175         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1176         data |= TXQ_CTRL_EN;
1177         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1178 }
1179
1180 /*
1181  * Reset the transmit and receive units; mask and clear all interrupts.
1182  * hw - Struct containing variables accessed by shared code
1183  * return : 0  or  idle status (if error)
1184  */
1185 static int atl1c_reset_mac(struct atl1c_hw *hw)
1186 {
1187         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1188         struct pci_dev *pdev = adapter->pdev;
1189         int ret;
1190
1191         AT_WRITE_REG(hw, REG_IMR, 0);
1192         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1193
1194         ret = atl1c_stop_mac(hw);
1195         if (ret)
1196                 return ret;
1197         /*
1198          * Issue Soft Reset to the MAC.  This will reset the chip's
1199          * transmit, receive, DMA.  It will not effect
1200          * the current PCI configuration.  The global reset bit is self-
1201          * clearing, and should clear within a microsecond.
1202          */
1203         AT_WRITE_REGW(hw, REG_MASTER_CTRL, MASTER_CTRL_SOFT_RST);
1204         AT_WRITE_FLUSH(hw);
1205         msleep(10);
1206         /* Wait at least 10ms for All module to be Idle */
1207
1208         if (atl1c_wait_until_idle(hw)) {
1209                 dev_err(&pdev->dev,
1210                         "MAC state machine can't be idle since"
1211                         " disabled for 10ms second\n");
1212                 return -1;
1213         }
1214         return 0;
1215 }
1216
1217 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1218 {
1219         u32 pm_ctrl_data;
1220
1221         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1222         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1223                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1224         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1225         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1226         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1227         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1228         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1229
1230         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1231         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1232         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1233         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1234 }
1235
1236 /*
1237  * Set ASPM state.
1238  * Enable/disable L0s/L1 depend on link state.
1239  */
1240 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1241 {
1242         u32 pm_ctrl_data;
1243
1244         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1245
1246         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1247         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1248                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1249
1250         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1251
1252         if (linkup) {
1253                 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1254                 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1255
1256                 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1257                 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1258         } else {
1259                 pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1260                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1261                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1262                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1263
1264                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1265
1266                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1267                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1268                 else
1269                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1270         }
1271
1272         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1273 }
1274
1275 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1276 {
1277         struct atl1c_hw *hw = &adapter->hw;
1278         struct net_device *netdev = adapter->netdev;
1279         u32 mac_ctrl_data;
1280
1281         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1282         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1283
1284         if (adapter->link_duplex == FULL_DUPLEX) {
1285                 hw->mac_duplex = true;
1286                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1287         }
1288
1289         if (adapter->link_speed == SPEED_1000)
1290                 hw->mac_speed = atl1c_mac_speed_1000;
1291         else
1292                 hw->mac_speed = atl1c_mac_speed_10_100;
1293
1294         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1295                         MAC_CTRL_SPEED_SHIFT;
1296
1297         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1298         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1299                         MAC_CTRL_PRMLEN_SHIFT);
1300
1301         if (adapter->vlgrp)
1302                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1303
1304         mac_ctrl_data |= MAC_CTRL_BC_EN;
1305         if (netdev->flags & IFF_PROMISC)
1306                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1307         if (netdev->flags & IFF_ALLMULTI)
1308                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1309
1310         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1311         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1312 }
1313
1314 /*
1315  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1316  * @adapter: board private structure
1317  *
1318  * Configure the Tx /Rx unit of the MAC after a reset.
1319  */
1320 static int atl1c_configure(struct atl1c_adapter *adapter)
1321 {
1322         struct atl1c_hw *hw = &adapter->hw;
1323         u32 master_ctrl_data = 0;
1324         u32 intr_modrt_data;
1325
1326         /* clear interrupt status */
1327         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1328         /*  Clear any WOL status */
1329         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1330         /* set Interrupt Clear Timer
1331          * HW will enable self to assert interrupt event to system after
1332          * waiting x-time for software to notify it accept interrupt.
1333          */
1334         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1335                 hw->ict & INT_RETRIG_TIMER_MASK);
1336
1337         atl1c_configure_des_ring(adapter);
1338
1339         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1340                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1341                                         IRQ_MODRT_TX_TIMER_SHIFT;
1342                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1343                                         IRQ_MODRT_RX_TIMER_SHIFT;
1344                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1345                 master_ctrl_data |=
1346                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1347         }
1348
1349         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1350                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1351
1352         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1353
1354         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1355                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1356                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1357                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1358                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1359         }
1360
1361         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1362                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1363                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1364         /* set MTU */
1365         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1366                         VLAN_HLEN + ETH_FCS_LEN);
1367         /* HDS, disable */
1368         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1369
1370         atl1c_configure_tx(adapter);
1371         atl1c_configure_rx(adapter);
1372         atl1c_configure_rss(adapter);
1373         atl1c_configure_dma(adapter);
1374
1375         return 0;
1376 }
1377
1378 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1379 {
1380         u16 hw_reg_addr = 0;
1381         unsigned long *stats_item = NULL;
1382         u32 data;
1383
1384         /* update rx status */
1385         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1386         stats_item  = &adapter->hw_stats.rx_ok;
1387         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1388                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1389                 *stats_item += data;
1390                 stats_item++;
1391                 hw_reg_addr += 4;
1392         }
1393 /* update tx status */
1394         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1395         stats_item  = &adapter->hw_stats.tx_ok;
1396         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1397                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1398                 *stats_item += data;
1399                 stats_item++;
1400                 hw_reg_addr += 4;
1401         }
1402 }
1403
1404 /*
1405  * atl1c_get_stats - Get System Network Statistics
1406  * @netdev: network interface device structure
1407  *
1408  * Returns the address of the device statistics structure.
1409  * The statistics are actually updated from the timer callback.
1410  */
1411 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1412 {
1413         struct atl1c_adapter *adapter = netdev_priv(netdev);
1414         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1415         struct net_device_stats *net_stats = &adapter->net_stats;
1416
1417         atl1c_update_hw_stats(adapter);
1418         net_stats->rx_packets = hw_stats->rx_ok;
1419         net_stats->tx_packets = hw_stats->tx_ok;
1420         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1421         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1422         net_stats->multicast  = hw_stats->rx_mcast;
1423         net_stats->collisions = hw_stats->tx_1_col +
1424                                 hw_stats->tx_2_col * 2 +
1425                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1426         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1427                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1428                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1429         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1430         net_stats->rx_length_errors = hw_stats->rx_len_err;
1431         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1432         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1433         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1434
1435         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1436
1437         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1438                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1439         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1440         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1441         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1442
1443         return &adapter->net_stats;
1444 }
1445
1446 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1447 {
1448         u16 phy_data;
1449
1450         spin_lock(&adapter->mdio_lock);
1451         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1452         spin_unlock(&adapter->mdio_lock);
1453 }
1454
1455 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1456                                 enum atl1c_trans_queue type)
1457 {
1458         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1459                                 &adapter->tpd_ring[type];
1460         struct atl1c_buffer *buffer_info;
1461         struct pci_dev *pdev = adapter->pdev;
1462         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1463         u16 hw_next_to_clean;
1464         u16 shift;
1465         u32 data;
1466
1467         if (type == atl1c_trans_high)
1468                 shift = MB_HTPD_CONS_IDX_SHIFT;
1469         else
1470                 shift = MB_NTPD_CONS_IDX_SHIFT;
1471
1472         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1473         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1474
1475         while (next_to_clean != hw_next_to_clean) {
1476                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1477                 atl1c_clean_buffer(pdev, buffer_info, 1);
1478                 if (++next_to_clean == tpd_ring->count)
1479                         next_to_clean = 0;
1480                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1481         }
1482
1483         if (netif_queue_stopped(adapter->netdev) &&
1484                         netif_carrier_ok(adapter->netdev)) {
1485                 netif_wake_queue(adapter->netdev);
1486         }
1487
1488         return true;
1489 }
1490
1491 /*
1492  * atl1c_intr - Interrupt Handler
1493  * @irq: interrupt number
1494  * @data: pointer to a network interface device structure
1495  * @pt_regs: CPU registers structure
1496  */
1497 static irqreturn_t atl1c_intr(int irq, void *data)
1498 {
1499         struct net_device *netdev  = data;
1500         struct atl1c_adapter *adapter = netdev_priv(netdev);
1501         struct pci_dev *pdev = adapter->pdev;
1502         struct atl1c_hw *hw = &adapter->hw;
1503         int max_ints = AT_MAX_INT_WORK;
1504         int handled = IRQ_NONE;
1505         u32 status;
1506         u32 reg_data;
1507
1508         do {
1509                 AT_READ_REG(hw, REG_ISR, &reg_data);
1510                 status = reg_data & hw->intr_mask;
1511
1512                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1513                         if (max_ints != AT_MAX_INT_WORK)
1514                                 handled = IRQ_HANDLED;
1515                         break;
1516                 }
1517                 /* link event */
1518                 if (status & ISR_GPHY)
1519                         atl1c_clear_phy_int(adapter);
1520                 /* Ack ISR */
1521                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1522                 if (status & ISR_RX_PKT) {
1523                         if (likely(napi_schedule_prep(&adapter->napi))) {
1524                                 hw->intr_mask &= ~ISR_RX_PKT;
1525                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1526                                 __napi_schedule(&adapter->napi);
1527                         }
1528                 }
1529                 if (status & ISR_TX_PKT)
1530                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1531
1532                 handled = IRQ_HANDLED;
1533                 /* check if PCIE PHY Link down */
1534                 if (status & ISR_ERROR) {
1535                         if (netif_msg_hw(adapter))
1536                                 dev_err(&pdev->dev,
1537                                         "atl1c hardware error (status = 0x%x)\n",
1538                                         status & ISR_ERROR);
1539                         /* reset MAC */
1540                         hw->intr_mask &= ~ISR_ERROR;
1541                         AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1542                         schedule_work(&adapter->reset_task);
1543                         break;
1544                 }
1545
1546                 if (status & ISR_OVER)
1547                         if (netif_msg_intr(adapter))
1548                                 dev_warn(&pdev->dev,
1549                                         "TX/RX over flow (status = 0x%x)\n",
1550                                         status & ISR_OVER);
1551
1552                 /* link event */
1553                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1554                         adapter->net_stats.tx_carrier_errors++;
1555                         atl1c_link_chg_event(adapter);
1556                         break;
1557                 }
1558
1559         } while (--max_ints > 0);
1560         /* re-enable Interrupt*/
1561         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1562         return handled;
1563 }
1564
1565 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1566                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1567 {
1568         /*
1569          * The pid field in RRS in not correct sometimes, so we
1570          * cannot figure out if the packet is fragmented or not,
1571          * so we tell the KERNEL CHECKSUM_NONE
1572          */
1573         skb->ip_summed = CHECKSUM_NONE;
1574 }
1575
1576 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1577 {
1578         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1579         struct pci_dev *pdev = adapter->pdev;
1580         struct atl1c_buffer *buffer_info, *next_info;
1581         struct sk_buff *skb;
1582         void *vir_addr = NULL;
1583         u16 num_alloc = 0;
1584         u16 rfd_next_to_use, next_next;
1585         struct atl1c_rx_free_desc *rfd_desc;
1586
1587         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1588         if (++next_next == rfd_ring->count)
1589                 next_next = 0;
1590         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1591         next_info = &rfd_ring->buffer_info[next_next];
1592
1593         while (next_info->flags & ATL1C_BUFFER_FREE) {
1594                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1595
1596                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1597                 if (unlikely(!skb)) {
1598                         if (netif_msg_rx_err(adapter))
1599                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1600                         break;
1601                 }
1602
1603                 /*
1604                  * Make buffer alignment 2 beyond a 16 byte boundary
1605                  * this will result in a 16 byte aligned IP header after
1606                  * the 14 byte MAC header is removed
1607                  */
1608                 vir_addr = skb->data;
1609                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1610                 buffer_info->skb = skb;
1611                 buffer_info->length = adapter->rx_buffer_len;
1612                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1613                                                 buffer_info->length,
1614                                                 PCI_DMA_FROMDEVICE);
1615                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1616                         ATL1C_PCIMAP_FROMDEVICE);
1617                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1618                 rfd_next_to_use = next_next;
1619                 if (++next_next == rfd_ring->count)
1620                         next_next = 0;
1621                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1622                 next_info = &rfd_ring->buffer_info[next_next];
1623                 num_alloc++;
1624         }
1625
1626         if (num_alloc) {
1627                 /* TODO: update mailbox here */
1628                 wmb();
1629                 rfd_ring->next_to_use = rfd_next_to_use;
1630                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1631                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1632         }
1633
1634         return num_alloc;
1635 }
1636
1637 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1638                         struct  atl1c_recv_ret_status *rrs, u16 num)
1639 {
1640         u16 i;
1641         /* the relationship between rrd and rfd is one map one */
1642         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1643                                         rrd_ring->next_to_clean)) {
1644                 rrs->word3 &= ~RRS_RXD_UPDATED;
1645                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1646                         rrd_ring->next_to_clean = 0;
1647         }
1648 }
1649
1650 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1651         struct atl1c_recv_ret_status *rrs, u16 num)
1652 {
1653         u16 i;
1654         u16 rfd_index;
1655         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1656
1657         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1658                         RRS_RX_RFD_INDEX_MASK;
1659         for (i = 0; i < num; i++) {
1660                 buffer_info[rfd_index].skb = NULL;
1661                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1662                                         ATL1C_BUFFER_FREE);
1663                 if (++rfd_index == rfd_ring->count)
1664                         rfd_index = 0;
1665         }
1666         rfd_ring->next_to_clean = rfd_index;
1667 }
1668
1669 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1670                    int *work_done, int work_to_do)
1671 {
1672         u16 rfd_num, rfd_index;
1673         u16 count = 0;
1674         u16 length;
1675         struct pci_dev *pdev = adapter->pdev;
1676         struct net_device *netdev  = adapter->netdev;
1677         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1678         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1679         struct sk_buff *skb;
1680         struct atl1c_recv_ret_status *rrs;
1681         struct atl1c_buffer *buffer_info;
1682
1683         while (1) {
1684                 if (*work_done >= work_to_do)
1685                         break;
1686                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1687                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1688                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1689                                 RRS_RX_RFD_CNT_MASK;
1690                         if (unlikely(rfd_num != 1))
1691                                 /* TODO support mul rfd*/
1692                                 if (netif_msg_rx_err(adapter))
1693                                         dev_warn(&pdev->dev,
1694                                                 "Multi rfd not support yet!\n");
1695                         goto rrs_checked;
1696                 } else {
1697                         break;
1698                 }
1699 rrs_checked:
1700                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1701                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1702                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1703                                 if (netif_msg_rx_err(adapter))
1704                                         dev_warn(&pdev->dev,
1705                                                 "wrong packet! rrs word3 is %x\n",
1706                                                 rrs->word3);
1707                         continue;
1708                 }
1709
1710                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1711                                 RRS_PKT_SIZE_MASK);
1712                 /* Good Receive */
1713                 if (likely(rfd_num == 1)) {
1714                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1715                                         RRS_RX_RFD_INDEX_MASK;
1716                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1717                         pci_unmap_single(pdev, buffer_info->dma,
1718                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1719                         skb = buffer_info->skb;
1720                 } else {
1721                         /* TODO */
1722                         if (netif_msg_rx_err(adapter))
1723                                 dev_warn(&pdev->dev,
1724                                         "Multi rfd not support yet!\n");
1725                         break;
1726                 }
1727                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1728                 skb_put(skb, length - ETH_FCS_LEN);
1729                 skb->protocol = eth_type_trans(skb, netdev);
1730                 skb->dev = netdev;
1731                 atl1c_rx_checksum(adapter, skb, rrs);
1732                 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1733                         u16 vlan;
1734
1735                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1736                         vlan = le16_to_cpu(vlan);
1737                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1738                 } else
1739                         netif_receive_skb(skb);
1740
1741                 (*work_done)++;
1742                 count++;
1743         }
1744         if (count)
1745                 atl1c_alloc_rx_buffer(adapter, que);
1746 }
1747
1748 /*
1749  * atl1c_clean - NAPI Rx polling callback
1750  * @adapter: board private structure
1751  */
1752 static int atl1c_clean(struct napi_struct *napi, int budget)
1753 {
1754         struct atl1c_adapter *adapter =
1755                         container_of(napi, struct atl1c_adapter, napi);
1756         int work_done = 0;
1757
1758         /* Keep link state information with original netdev */
1759         if (!netif_carrier_ok(adapter->netdev))
1760                 goto quit_polling;
1761         /* just enable one RXQ */
1762         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1763
1764         if (work_done < budget) {
1765 quit_polling:
1766                 napi_complete(napi);
1767                 adapter->hw.intr_mask |= ISR_RX_PKT;
1768                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1769         }
1770         return work_done;
1771 }
1772
1773 #ifdef CONFIG_NET_POLL_CONTROLLER
1774
1775 /*
1776  * Polling 'interrupt' - used by things like netconsole to send skbs
1777  * without having to re-enable interrupts. It's not called while
1778  * the interrupt routine is executing.
1779  */
1780 static void atl1c_netpoll(struct net_device *netdev)
1781 {
1782         struct atl1c_adapter *adapter = netdev_priv(netdev);
1783
1784         disable_irq(adapter->pdev->irq);
1785         atl1c_intr(adapter->pdev->irq, netdev);
1786         enable_irq(adapter->pdev->irq);
1787 }
1788 #endif
1789
1790 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1791 {
1792         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1793         u16 next_to_use = 0;
1794         u16 next_to_clean = 0;
1795
1796         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1797         next_to_use   = tpd_ring->next_to_use;
1798
1799         return (u16)(next_to_clean > next_to_use) ?
1800                 (next_to_clean - next_to_use - 1) :
1801                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1802 }
1803
1804 /*
1805  * get next usable tpd
1806  * Note: should call atl1c_tdp_avail to make sure
1807  * there is enough tpd to use
1808  */
1809 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1810         enum atl1c_trans_queue type)
1811 {
1812         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1813         struct atl1c_tpd_desc *tpd_desc;
1814         u16 next_to_use = 0;
1815
1816         next_to_use = tpd_ring->next_to_use;
1817         if (++tpd_ring->next_to_use == tpd_ring->count)
1818                 tpd_ring->next_to_use = 0;
1819         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1820         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1821         return  tpd_desc;
1822 }
1823
1824 static struct atl1c_buffer *
1825 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1826 {
1827         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1828
1829         return &tpd_ring->buffer_info[tpd -
1830                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1831 }
1832
1833 /* Calculate the transmit packet descript needed*/
1834 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1835 {
1836         u16 tpd_req;
1837         u16 proto_hdr_len = 0;
1838
1839         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1840
1841         if (skb_is_gso(skb)) {
1842                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1843                 if (proto_hdr_len < skb_headlen(skb))
1844                         tpd_req++;
1845                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1846                         tpd_req++;
1847         }
1848         return tpd_req;
1849 }
1850
1851 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1852                           struct sk_buff *skb,
1853                           struct atl1c_tpd_desc **tpd,
1854                           enum atl1c_trans_queue type)
1855 {
1856         struct pci_dev *pdev = adapter->pdev;
1857         u8 hdr_len;
1858         u32 real_len;
1859         unsigned short offload_type;
1860         int err;
1861
1862         if (skb_is_gso(skb)) {
1863                 if (skb_header_cloned(skb)) {
1864                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1865                         if (unlikely(err))
1866                                 return -1;
1867                 }
1868                 offload_type = skb_shinfo(skb)->gso_type;
1869
1870                 if (offload_type & SKB_GSO_TCPV4) {
1871                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1872                                         + ntohs(ip_hdr(skb)->tot_len));
1873
1874                         if (real_len < skb->len)
1875                                 pskb_trim(skb, real_len);
1876
1877                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1878                         if (unlikely(skb->len == hdr_len)) {
1879                                 /* only xsum need */
1880                                 if (netif_msg_tx_queued(adapter))
1881                                         dev_warn(&pdev->dev,
1882                                                 "IPV4 tso with zero data??\n");
1883                                 goto check_sum;
1884                         } else {
1885                                 ip_hdr(skb)->check = 0;
1886                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1887                                                         ip_hdr(skb)->saddr,
1888                                                         ip_hdr(skb)->daddr,
1889                                                         0, IPPROTO_TCP, 0);
1890                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1891                         }
1892                 }
1893
1894                 if (offload_type & SKB_GSO_TCPV6) {
1895                         struct atl1c_tpd_ext_desc *etpd =
1896                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1897
1898                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1899                         *tpd = atl1c_get_tpd(adapter, type);
1900                         ipv6_hdr(skb)->payload_len = 0;
1901                         /* check payload == 0 byte ? */
1902                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1903                         if (unlikely(skb->len == hdr_len)) {
1904                                 /* only xsum need */
1905                                 if (netif_msg_tx_queued(adapter))
1906                                         dev_warn(&pdev->dev,
1907                                                 "IPV6 tso with zero data??\n");
1908                                 goto check_sum;
1909                         } else
1910                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1911                                                 &ipv6_hdr(skb)->saddr,
1912                                                 &ipv6_hdr(skb)->daddr,
1913                                                 0, IPPROTO_TCP, 0);
1914                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1915                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1916                         etpd->pkt_len = cpu_to_le32(skb->len);
1917                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1918                 }
1919
1920                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1921                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1922                                 TPD_TCPHDR_OFFSET_SHIFT;
1923                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1924                                 TPD_MSS_SHIFT;
1925                 return 0;
1926         }
1927
1928 check_sum:
1929         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1930                 u8 css, cso;
1931                 cso = skb_transport_offset(skb);
1932
1933                 if (unlikely(cso & 0x1)) {
1934                         if (netif_msg_tx_err(adapter))
1935                                 dev_err(&adapter->pdev->dev,
1936                                         "payload offset should not an event number\n");
1937                         return -1;
1938                 } else {
1939                         css = cso + skb->csum_offset;
1940
1941                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1942                                         TPD_PLOADOFFSET_SHIFT;
1943                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1944                                         TPD_CCSUM_OFFSET_SHIFT;
1945                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1946                 }
1947         }
1948         return 0;
1949 }
1950
1951 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1952                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1953                         enum atl1c_trans_queue type)
1954 {
1955         struct atl1c_tpd_desc *use_tpd = NULL;
1956         struct atl1c_buffer *buffer_info = NULL;
1957         u16 buf_len = skb_headlen(skb);
1958         u16 map_len = 0;
1959         u16 mapped_len = 0;
1960         u16 hdr_len = 0;
1961         u16 nr_frags;
1962         u16 f;
1963         int tso;
1964
1965         nr_frags = skb_shinfo(skb)->nr_frags;
1966         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
1967         if (tso) {
1968                 /* TSO */
1969                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1970                 use_tpd = tpd;
1971
1972                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1973                 buffer_info->length = map_len;
1974                 buffer_info->dma = pci_map_single(adapter->pdev,
1975                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1976                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1977                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1978                         ATL1C_PCIMAP_TODEVICE);
1979                 mapped_len += map_len;
1980                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1981                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1982         }
1983
1984         if (mapped_len < buf_len) {
1985                 /* mapped_len == 0, means we should use the first tpd,
1986                    which is given by caller  */
1987                 if (mapped_len == 0)
1988                         use_tpd = tpd;
1989                 else {
1990                         use_tpd = atl1c_get_tpd(adapter, type);
1991                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1992                 }
1993                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1994                 buffer_info->length = buf_len - mapped_len;
1995                 buffer_info->dma =
1996                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1997                                         buffer_info->length, PCI_DMA_TODEVICE);
1998                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1999                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2000                         ATL1C_PCIMAP_TODEVICE);
2001                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2002                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2003         }
2004
2005         for (f = 0; f < nr_frags; f++) {
2006                 struct skb_frag_struct *frag;
2007
2008                 frag = &skb_shinfo(skb)->frags[f];
2009
2010                 use_tpd = atl1c_get_tpd(adapter, type);
2011                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2012
2013                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2014                 buffer_info->length = frag->size;
2015                 buffer_info->dma =
2016                         pci_map_page(adapter->pdev, frag->page,
2017                                         frag->page_offset,
2018                                         buffer_info->length,
2019                                         PCI_DMA_TODEVICE);
2020                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2021                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2022                         ATL1C_PCIMAP_TODEVICE);
2023                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2024                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2025         }
2026
2027         /* The last tpd */
2028         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2029         /* The last buffer info contain the skb address,
2030            so it will be free after unmap */
2031         buffer_info->skb = skb;
2032 }
2033
2034 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2035                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2036 {
2037         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2038         u32 prod_data;
2039
2040         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2041         switch (type) {
2042         case atl1c_trans_high:
2043                 prod_data &= 0xFFFF0000;
2044                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2045                 break;
2046         case atl1c_trans_normal:
2047                 prod_data &= 0x0000FFFF;
2048                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2049                 break;
2050         default:
2051                 break;
2052         }
2053         wmb();
2054         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2055 }
2056
2057 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2058                                           struct net_device *netdev)
2059 {
2060         struct atl1c_adapter *adapter = netdev_priv(netdev);
2061         unsigned long flags;
2062         u16 tpd_req = 1;
2063         struct atl1c_tpd_desc *tpd;
2064         enum atl1c_trans_queue type = atl1c_trans_normal;
2065
2066         if (test_bit(__AT_DOWN, &adapter->flags)) {
2067                 dev_kfree_skb_any(skb);
2068                 return NETDEV_TX_OK;
2069         }
2070
2071         tpd_req = atl1c_cal_tpd_req(skb);
2072         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2073                 if (netif_msg_pktdata(adapter))
2074                         dev_info(&adapter->pdev->dev, "tx locked\n");
2075                 return NETDEV_TX_LOCKED;
2076         }
2077         if (skb->mark == 0x01)
2078                 type = atl1c_trans_high;
2079         else
2080                 type = atl1c_trans_normal;
2081
2082         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2083                 /* no enough descriptor, just stop queue */
2084                 netif_stop_queue(netdev);
2085                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2086                 return NETDEV_TX_BUSY;
2087         }
2088
2089         tpd = atl1c_get_tpd(adapter, type);
2090
2091         /* do TSO and check sum */
2092         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2093                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2094                 dev_kfree_skb_any(skb);
2095                 return NETDEV_TX_OK;
2096         }
2097
2098         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2099                 u16 vlan = vlan_tx_tag_get(skb);
2100                 __le16 tag;
2101
2102                 vlan = cpu_to_le16(vlan);
2103                 AT_VLAN_TO_TAG(vlan, tag);
2104                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2105                 tpd->vlan_tag = tag;
2106         }
2107
2108         if (skb_network_offset(skb) != ETH_HLEN)
2109                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2110
2111         atl1c_tx_map(adapter, skb, tpd, type);
2112         atl1c_tx_queue(adapter, skb, tpd, type);
2113
2114         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2115         return NETDEV_TX_OK;
2116 }
2117
2118 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2119 {
2120         struct net_device *netdev = adapter->netdev;
2121
2122         free_irq(adapter->pdev->irq, netdev);
2123
2124         if (adapter->have_msi)
2125                 pci_disable_msi(adapter->pdev);
2126 }
2127
2128 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2129 {
2130         struct pci_dev    *pdev   = adapter->pdev;
2131         struct net_device *netdev = adapter->netdev;
2132         int flags = 0;
2133         int err = 0;
2134
2135         adapter->have_msi = true;
2136         err = pci_enable_msi(adapter->pdev);
2137         if (err) {
2138                 if (netif_msg_ifup(adapter))
2139                         dev_err(&pdev->dev,
2140                                 "Unable to allocate MSI interrupt Error: %d\n",
2141                                 err);
2142                 adapter->have_msi = false;
2143         } else
2144                 netdev->irq = pdev->irq;
2145
2146         if (!adapter->have_msi)
2147                 flags |= IRQF_SHARED;
2148         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2149                         netdev->name, netdev);
2150         if (err) {
2151                 if (netif_msg_ifup(adapter))
2152                         dev_err(&pdev->dev,
2153                                 "Unable to allocate interrupt Error: %d\n",
2154                                 err);
2155                 if (adapter->have_msi)
2156                         pci_disable_msi(adapter->pdev);
2157                 return err;
2158         }
2159         if (netif_msg_ifup(adapter))
2160                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2161         return err;
2162 }
2163
2164 int atl1c_up(struct atl1c_adapter *adapter)
2165 {
2166         struct net_device *netdev = adapter->netdev;
2167         int num;
2168         int err;
2169         int i;
2170
2171         netif_carrier_off(netdev);
2172         atl1c_init_ring_ptrs(adapter);
2173         atl1c_set_multi(netdev);
2174         atl1c_restore_vlan(adapter);
2175
2176         for (i = 0; i < adapter->num_rx_queues; i++) {
2177                 num = atl1c_alloc_rx_buffer(adapter, i);
2178                 if (unlikely(num == 0)) {
2179                         err = -ENOMEM;
2180                         goto err_alloc_rx;
2181                 }
2182         }
2183
2184         if (atl1c_configure(adapter)) {
2185                 err = -EIO;
2186                 goto err_up;
2187         }
2188
2189         err = atl1c_request_irq(adapter);
2190         if (unlikely(err))
2191                 goto err_up;
2192
2193         clear_bit(__AT_DOWN, &adapter->flags);
2194         napi_enable(&adapter->napi);
2195         atl1c_irq_enable(adapter);
2196         atl1c_check_link_status(adapter);
2197         netif_start_queue(netdev);
2198         return err;
2199
2200 err_up:
2201 err_alloc_rx:
2202         atl1c_clean_rx_ring(adapter);
2203         return err;
2204 }
2205
2206 void atl1c_down(struct atl1c_adapter *adapter)
2207 {
2208         struct net_device *netdev = adapter->netdev;
2209
2210         atl1c_del_timer(adapter);
2211         atl1c_cancel_work(adapter);
2212
2213         /* signal that we're down so the interrupt handler does not
2214          * reschedule our watchdog timer */
2215         set_bit(__AT_DOWN, &adapter->flags);
2216         netif_carrier_off(netdev);
2217         napi_disable(&adapter->napi);
2218         atl1c_irq_disable(adapter);
2219         atl1c_free_irq(adapter);
2220         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
2221         /* reset MAC to disable all RX/TX */
2222         atl1c_reset_mac(&adapter->hw);
2223         msleep(1);
2224
2225         adapter->link_speed = SPEED_0;
2226         adapter->link_duplex = -1;
2227         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2228         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2229         atl1c_clean_rx_ring(adapter);
2230 }
2231
2232 /*
2233  * atl1c_open - Called when a network interface is made active
2234  * @netdev: network interface device structure
2235  *
2236  * Returns 0 on success, negative value on failure
2237  *
2238  * The open entry point is called when a network interface is made
2239  * active by the system (IFF_UP).  At this point all resources needed
2240  * for transmit and receive operations are allocated, the interrupt
2241  * handler is registered with the OS, the watchdog timer is started,
2242  * and the stack is notified that the interface is ready.
2243  */
2244 static int atl1c_open(struct net_device *netdev)
2245 {
2246         struct atl1c_adapter *adapter = netdev_priv(netdev);
2247         int err;
2248
2249         /* disallow open during test */
2250         if (test_bit(__AT_TESTING, &adapter->flags))
2251                 return -EBUSY;
2252
2253         /* allocate rx/tx dma buffer & descriptors */
2254         err = atl1c_setup_ring_resources(adapter);
2255         if (unlikely(err))
2256                 return err;
2257
2258         err = atl1c_up(adapter);
2259         if (unlikely(err))
2260                 goto err_up;
2261
2262         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2263                 u32 phy_data;
2264
2265                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2266                 phy_data |= MDIO_AP_EN;
2267                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2268         }
2269         return 0;
2270
2271 err_up:
2272         atl1c_free_irq(adapter);
2273         atl1c_free_ring_resources(adapter);
2274         atl1c_reset_mac(&adapter->hw);
2275         return err;
2276 }
2277
2278 /*
2279  * atl1c_close - Disables a network interface
2280  * @netdev: network interface device structure
2281  *
2282  * Returns 0, this is not allowed to fail
2283  *
2284  * The close entry point is called when an interface is de-activated
2285  * by the OS.  The hardware is still under the drivers control, but
2286  * needs to be disabled.  A global MAC reset is issued to stop the
2287  * hardware, and all transmit and receive resources are freed.
2288  */
2289 static int atl1c_close(struct net_device *netdev)
2290 {
2291         struct atl1c_adapter *adapter = netdev_priv(netdev);
2292
2293         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2294         atl1c_down(adapter);
2295         atl1c_free_ring_resources(adapter);
2296         return 0;
2297 }
2298
2299 static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2300 {
2301         struct net_device *netdev = pci_get_drvdata(pdev);
2302         struct atl1c_adapter *adapter = netdev_priv(netdev);
2303         struct atl1c_hw *hw = &adapter->hw;
2304         u32 ctrl;
2305         u32 mac_ctrl_data;
2306         u32 master_ctrl_data;
2307         u32 wol_ctrl_data = 0;
2308         u16 mii_bmsr_data;
2309         u16 save_autoneg_advertised;
2310         u16 mii_intr_status_data;
2311         u32 wufc = adapter->wol;
2312         u32 i;
2313         int retval = 0;
2314
2315         if (netif_running(netdev)) {
2316                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2317                 atl1c_down(adapter);
2318         }
2319         netif_device_detach(netdev);
2320         atl1c_disable_l0s_l1(hw);
2321         retval = pci_save_state(pdev);
2322         if (retval)
2323                 return retval;
2324         if (wufc) {
2325                 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2326                 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2327
2328                 /* get link status */
2329                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2330                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2331                 save_autoneg_advertised = hw->autoneg_advertised;
2332                 hw->autoneg_advertised = ADVERTISED_10baseT_Half;
2333                 if (atl1c_restart_autoneg(hw) != 0)
2334                         if (netif_msg_link(adapter))
2335                                 dev_warn(&pdev->dev, "phy autoneg failed\n");
2336                 hw->phy_configured = false; /* re-init PHY when resume */
2337                 hw->autoneg_advertised = save_autoneg_advertised;
2338                 /* turn on magic packet wol */
2339                 if (wufc & AT_WUFC_MAG)
2340                         wol_ctrl_data = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2341
2342                 if (wufc & AT_WUFC_LNKC) {
2343                         for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2344                                 msleep(100);
2345                                 atl1c_read_phy_reg(hw, MII_BMSR,
2346                                         (u16 *)&mii_bmsr_data);
2347                                 if (mii_bmsr_data & BMSR_LSTATUS)
2348                                         break;
2349                         }
2350                         if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2351                                 if (netif_msg_link(adapter))
2352                                         dev_warn(&pdev->dev,
2353                                                 "%s: Link may change"
2354                                                 "when suspend\n",
2355                                                 atl1c_driver_name);
2356                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2357                         /* only link up can wake up */
2358                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2359                                 if (netif_msg_link(adapter))
2360                                         dev_err(&pdev->dev,
2361                                                 "%s: read write phy "
2362                                                 "register failed.\n",
2363                                                 atl1c_driver_name);
2364                                 goto wol_dis;
2365                         }
2366                 }
2367                 /* clear phy interrupt */
2368                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2369                 /* Config MAC Ctrl register */
2370                 mac_ctrl_data = MAC_CTRL_RX_EN;
2371                 /* set to 10/100M halt duplex */
2372                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2373                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2374                                  MAC_CTRL_PRMLEN_MASK) <<
2375                                  MAC_CTRL_PRMLEN_SHIFT);
2376
2377                 if (adapter->vlgrp)
2378                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2379
2380                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2381                 if (wufc & AT_WUFC_MAG)
2382                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2383
2384                 if (netif_msg_hw(adapter))
2385                         dev_dbg(&pdev->dev,
2386                                 "%s: suspend MAC=0x%x\n",
2387                                 atl1c_driver_name, mac_ctrl_data);
2388                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2389                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2390                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2391
2392                 /* pcie patch */
2393                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2394                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2395                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2396
2397                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2398                 goto suspend_exit;
2399         }
2400 wol_dis:
2401
2402         /* WOL disabled */
2403         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2404
2405         /* pcie patch */
2406         AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2407         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2408         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2409
2410         atl1c_phy_disable(hw);
2411         hw->phy_configured = false; /* re-init PHY when resume */
2412
2413         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2414 suspend_exit:
2415
2416         pci_disable_device(pdev);
2417         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2418
2419         return 0;
2420 }
2421
2422 static int atl1c_resume(struct pci_dev *pdev)
2423 {
2424         struct net_device *netdev = pci_get_drvdata(pdev);
2425         struct atl1c_adapter *adapter = netdev_priv(netdev);
2426
2427         pci_set_power_state(pdev, PCI_D0);
2428         pci_restore_state(pdev);
2429         pci_enable_wake(pdev, PCI_D3hot, 0);
2430         pci_enable_wake(pdev, PCI_D3cold, 0);
2431
2432         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2433
2434         atl1c_phy_reset(&adapter->hw);
2435         atl1c_reset_mac(&adapter->hw);
2436         netif_device_attach(netdev);
2437         if (netif_running(netdev))
2438                 atl1c_up(adapter);
2439
2440         return 0;
2441 }
2442
2443 static void atl1c_shutdown(struct pci_dev *pdev)
2444 {
2445         atl1c_suspend(pdev, PMSG_SUSPEND);
2446 }
2447
2448 static const struct net_device_ops atl1c_netdev_ops = {
2449         .ndo_open               = atl1c_open,
2450         .ndo_stop               = atl1c_close,
2451         .ndo_validate_addr      = eth_validate_addr,
2452         .ndo_start_xmit         = atl1c_xmit_frame,
2453         .ndo_set_mac_address    = atl1c_set_mac_addr,
2454         .ndo_set_multicast_list = atl1c_set_multi,
2455         .ndo_change_mtu         = atl1c_change_mtu,
2456         .ndo_do_ioctl           = atl1c_ioctl,
2457         .ndo_tx_timeout         = atl1c_tx_timeout,
2458         .ndo_get_stats          = atl1c_get_stats,
2459         .ndo_vlan_rx_register   = atl1c_vlan_rx_register,
2460 #ifdef CONFIG_NET_POLL_CONTROLLER
2461         .ndo_poll_controller    = atl1c_netpoll,
2462 #endif
2463 };
2464
2465 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2466 {
2467         SET_NETDEV_DEV(netdev, &pdev->dev);
2468         pci_set_drvdata(pdev, netdev);
2469
2470         netdev->irq  = pdev->irq;
2471         netdev->netdev_ops = &atl1c_netdev_ops;
2472         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2473         atl1c_set_ethtool_ops(netdev);
2474
2475         /* TODO: add when ready */
2476         netdev->features =      NETIF_F_SG         |
2477                                 NETIF_F_HW_CSUM    |
2478                                 NETIF_F_HW_VLAN_TX |
2479                                 NETIF_F_HW_VLAN_RX |
2480                                 NETIF_F_TSO        |
2481                                 NETIF_F_TSO6;
2482         return 0;
2483 }
2484
2485 /*
2486  * atl1c_probe - Device Initialization Routine
2487  * @pdev: PCI device information struct
2488  * @ent: entry in atl1c_pci_tbl
2489  *
2490  * Returns 0 on success, negative on failure
2491  *
2492  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2493  * The OS initialization, configuring of the adapter private structure,
2494  * and a hardware reset occur.
2495  */
2496 static int __devinit atl1c_probe(struct pci_dev *pdev,
2497                                  const struct pci_device_id *ent)
2498 {
2499         struct net_device *netdev;
2500         struct atl1c_adapter *adapter;
2501         static int cards_found;
2502
2503         int err = 0;
2504
2505         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2506         err = pci_enable_device_mem(pdev);
2507         if (err) {
2508                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2509                 return err;
2510         }
2511
2512         /*
2513          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2514          * shared register for the high 32 bits, so only a single, aligned,
2515          * 4 GB physical address range can be used at a time.
2516          *
2517          * Supporting 64-bit DMA on this hardware is more trouble than it's
2518          * worth.  It is far easier to limit to 32-bit DMA than update
2519          * various kernel subsystems to support the mechanics required by a
2520          * fixed-high-32-bit system.
2521          */
2522         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2523             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2524                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2525                 goto err_dma;
2526         }
2527
2528         err = pci_request_regions(pdev, atl1c_driver_name);
2529         if (err) {
2530                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2531                 goto err_pci_reg;
2532         }
2533
2534         pci_set_master(pdev);
2535
2536         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2537         if (netdev == NULL) {
2538                 err = -ENOMEM;
2539                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2540                 goto err_alloc_etherdev;
2541         }
2542
2543         err = atl1c_init_netdev(netdev, pdev);
2544         if (err) {
2545                 dev_err(&pdev->dev, "init netdevice failed\n");
2546                 goto err_init_netdev;
2547         }
2548         adapter = netdev_priv(netdev);
2549         adapter->bd_number = cards_found;
2550         adapter->netdev = netdev;
2551         adapter->pdev = pdev;
2552         adapter->hw.adapter = adapter;
2553         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2554         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2555         if (!adapter->hw.hw_addr) {
2556                 err = -EIO;
2557                 dev_err(&pdev->dev, "cannot map device registers\n");
2558                 goto err_ioremap;
2559         }
2560         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2561
2562         /* init mii data */
2563         adapter->mii.dev = netdev;
2564         adapter->mii.mdio_read  = atl1c_mdio_read;
2565         adapter->mii.mdio_write = atl1c_mdio_write;
2566         adapter->mii.phy_id_mask = 0x1f;
2567         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2568         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2569         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2570                         (unsigned long)adapter);
2571         /* setup the private structure */
2572         err = atl1c_sw_init(adapter);
2573         if (err) {
2574                 dev_err(&pdev->dev, "net device private data init failed\n");
2575                 goto err_sw_init;
2576         }
2577         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2578                         ATL1C_PCIE_PHY_RESET);
2579
2580         /* Init GPHY as early as possible due to power saving issue  */
2581         atl1c_phy_reset(&adapter->hw);
2582
2583         err = atl1c_reset_mac(&adapter->hw);
2584         if (err) {
2585                 err = -EIO;
2586                 goto err_reset;
2587         }
2588
2589         device_init_wakeup(&pdev->dev, 1);
2590         /* reset the controller to
2591          * put the device in a known good starting state */
2592         err = atl1c_phy_init(&adapter->hw);
2593         if (err) {
2594                 err = -EIO;
2595                 goto err_reset;
2596         }
2597         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2598                 err = -EIO;
2599                 dev_err(&pdev->dev, "get mac address failed\n");
2600                 goto err_eeprom;
2601         }
2602         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2603         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2604         if (netif_msg_probe(adapter))
2605                 dev_dbg(&pdev->dev,
2606                         "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2607                         adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2608                         adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2609                         adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2610
2611         atl1c_hw_set_mac_addr(&adapter->hw);
2612         INIT_WORK(&adapter->reset_task, atl1c_reset_task);
2613         INIT_WORK(&adapter->link_chg_task, atl1c_link_chg_task);
2614         err = register_netdev(netdev);
2615         if (err) {
2616                 dev_err(&pdev->dev, "register netdevice failed\n");
2617                 goto err_register;
2618         }
2619
2620         if (netif_msg_probe(adapter))
2621                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2622         cards_found++;
2623         return 0;
2624
2625 err_reset:
2626 err_register:
2627 err_sw_init:
2628 err_eeprom:
2629         iounmap(adapter->hw.hw_addr);
2630 err_init_netdev:
2631 err_ioremap:
2632         free_netdev(netdev);
2633 err_alloc_etherdev:
2634         pci_release_regions(pdev);
2635 err_pci_reg:
2636 err_dma:
2637         pci_disable_device(pdev);
2638         return err;
2639 }
2640
2641 /*
2642  * atl1c_remove - Device Removal Routine
2643  * @pdev: PCI device information struct
2644  *
2645  * atl1c_remove is called by the PCI subsystem to alert the driver
2646  * that it should release a PCI device.  The could be caused by a
2647  * Hot-Plug event, or because the driver is going to be removed from
2648  * memory.
2649  */
2650 static void __devexit atl1c_remove(struct pci_dev *pdev)
2651 {
2652         struct net_device *netdev = pci_get_drvdata(pdev);
2653         struct atl1c_adapter *adapter = netdev_priv(netdev);
2654
2655         unregister_netdev(netdev);
2656         atl1c_phy_disable(&adapter->hw);
2657
2658         iounmap(adapter->hw.hw_addr);
2659
2660         pci_release_regions(pdev);
2661         pci_disable_device(pdev);
2662         free_netdev(netdev);
2663 }
2664
2665 /*
2666  * atl1c_io_error_detected - called when PCI error is detected
2667  * @pdev: Pointer to PCI device
2668  * @state: The current pci connection state
2669  *
2670  * This function is called after a PCI bus error affecting
2671  * this device has been detected.
2672  */
2673 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2674                                                 pci_channel_state_t state)
2675 {
2676         struct net_device *netdev = pci_get_drvdata(pdev);
2677         struct atl1c_adapter *adapter = netdev_priv(netdev);
2678
2679         netif_device_detach(netdev);
2680
2681         if (state == pci_channel_io_perm_failure)
2682                 return PCI_ERS_RESULT_DISCONNECT;
2683
2684         if (netif_running(netdev))
2685                 atl1c_down(adapter);
2686
2687         pci_disable_device(pdev);
2688
2689         /* Request a slot slot reset. */
2690         return PCI_ERS_RESULT_NEED_RESET;
2691 }
2692
2693 /*
2694  * atl1c_io_slot_reset - called after the pci bus has been reset.
2695  * @pdev: Pointer to PCI device
2696  *
2697  * Restart the card from scratch, as if from a cold-boot. Implementation
2698  * resembles the first-half of the e1000_resume routine.
2699  */
2700 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2701 {
2702         struct net_device *netdev = pci_get_drvdata(pdev);
2703         struct atl1c_adapter *adapter = netdev_priv(netdev);
2704
2705         if (pci_enable_device(pdev)) {
2706                 if (netif_msg_hw(adapter))
2707                         dev_err(&pdev->dev,
2708                                 "Cannot re-enable PCI device after reset\n");
2709                 return PCI_ERS_RESULT_DISCONNECT;
2710         }
2711         pci_set_master(pdev);
2712
2713         pci_enable_wake(pdev, PCI_D3hot, 0);
2714         pci_enable_wake(pdev, PCI_D3cold, 0);
2715
2716         atl1c_reset_mac(&adapter->hw);
2717
2718         return PCI_ERS_RESULT_RECOVERED;
2719 }
2720
2721 /*
2722  * atl1c_io_resume - called when traffic can start flowing again.
2723  * @pdev: Pointer to PCI device
2724  *
2725  * This callback is called when the error recovery driver tells us that
2726  * its OK to resume normal operation. Implementation resembles the
2727  * second-half of the atl1c_resume routine.
2728  */
2729 static void atl1c_io_resume(struct pci_dev *pdev)
2730 {
2731         struct net_device *netdev = pci_get_drvdata(pdev);
2732         struct atl1c_adapter *adapter = netdev_priv(netdev);
2733
2734         if (netif_running(netdev)) {
2735                 if (atl1c_up(adapter)) {
2736                         if (netif_msg_hw(adapter))
2737                                 dev_err(&pdev->dev,
2738                                         "Cannot bring device back up after reset\n");
2739                         return;
2740                 }
2741         }
2742
2743         netif_device_attach(netdev);
2744 }
2745
2746 static struct pci_error_handlers atl1c_err_handler = {
2747         .error_detected = atl1c_io_error_detected,
2748         .slot_reset = atl1c_io_slot_reset,
2749         .resume = atl1c_io_resume,
2750 };
2751
2752 static struct pci_driver atl1c_driver = {
2753         .name     = atl1c_driver_name,
2754         .id_table = atl1c_pci_tbl,
2755         .probe    = atl1c_probe,
2756         .remove   = __devexit_p(atl1c_remove),
2757         /* Power Managment Hooks */
2758         .suspend  = atl1c_suspend,
2759         .resume   = atl1c_resume,
2760         .shutdown = atl1c_shutdown,
2761         .err_handler = &atl1c_err_handler
2762 };
2763
2764 /*
2765  * atl1c_init_module - Driver Registration Routine
2766  *
2767  * atl1c_init_module is the first routine called when the driver is
2768  * loaded. All it does is register with the PCI subsystem.
2769  */
2770 static int __init atl1c_init_module(void)
2771 {
2772         return pci_register_driver(&atl1c_driver);
2773 }
2774
2775 /*
2776  * atl1c_exit_module - Driver Exit Cleanup Routine
2777  *
2778  * atl1c_exit_module is called just before the driver is removed
2779  * from memory.
2780  */
2781 static void __exit atl1c_exit_module(void)
2782 {
2783         pci_unregister_driver(&atl1c_driver);
2784 }
2785
2786 module_init(atl1c_init_module);
2787 module_exit(atl1c_exit_module);