drivers/net/ethernet/atheros/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 "1.0.1.0-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27
  28 /*
  29  * atl1c_pci_tbl - PCI Device ID Table
  30  *
  31  * Wildcard entries (PCI_ANY_ID) should come last
  32  * Last entry must be all 0s
  33  *
  34  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  35  *   Class, Class Mask, private data (not used) }
  36  */
  37 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = {
  38         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  41         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  42         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  43         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  44         /* required last entry */
  45         { 0 }
  46 };
  47 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  48
  49 MODULE_AUTHOR("Jie Yang");
  50 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
  51 MODULE_DESCRIPTION("Qualcom Atheros 100/1000M Ethernet Network Driver");
  52 MODULE_LICENSE("GPL");
  53 MODULE_VERSION(ATL1C_DRV_VERSION);
  54
  55 static int atl1c_stop_mac(struct atl1c_hw *hw);
  56 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  57 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
  58 static void atl1c_start_mac(struct atl1c_adapter *adapter);
  59 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
  60                    int *work_done, int work_to_do);
  61 static int atl1c_up(struct atl1c_adapter *adapter);
  62 static void atl1c_down(struct atl1c_adapter *adapter);
  63 static int atl1c_reset_mac(struct atl1c_hw *hw);
  64 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
  65 static int atl1c_configure(struct atl1c_adapter *adapter);
  66 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
  67
  68 static const u16 atl1c_pay_load_size[] = {
  69         128, 256, 512, 1024, 2048, 4096,
  70 };
  71
  72
  73 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  74         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  75 static void atl1c_pcie_patch(struct atl1c_hw *hw)
  76 {
  77         u32 mst_data, data;
  78
  79         /* pclk sel could switch to 25M */
  80         AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
  81         mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
  82         AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
  83
  84         /* WoL/PCIE related settings */
  85         if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
  86                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
  87                 data |= PCIE_PHYMISC_FORCE_RCV_DET;
  88                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
  89         } else { /* new dev set bit5 of MASTER */
  90                 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
  91                         AT_WRITE_REG(hw, REG_MASTER_CTRL,
  92                                 mst_data | MASTER_CTRL_WAKEN_25M);
  93         }
  94         /* aspm/PCIE setting only for l2cb 1.0 */
  95         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
  96                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
  97                 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
  98                         L2CB1_PCIE_PHYMISC2_CDR_BW);
  99                 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
 100                         L2CB1_PCIE_PHYMISC2_L0S_TH);
 101                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
 102                 /* extend L1 sync timer */
 103                 AT_READ_REG(hw, REG_LINK_CTRL, &data);
 104                 data |= LINK_CTRL_EXT_SYNC;
 105                 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
 106         }
 107         /* l2cb 1.x & l1d 1.x */
 108         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
 109                 AT_READ_REG(hw, REG_PM_CTRL, &data);
 110                 data |= PM_CTRL_L0S_BUFSRX_EN;
 111                 AT_WRITE_REG(hw, REG_PM_CTRL, data);
 112                 /* clear vendor msg */
 113                 AT_READ_REG(hw, REG_DMA_DBG, &data);
 114                 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
 115         }
 116 }
 117
 118 /* FIXME: no need any more ? */
 119 /*
 120  * atl1c_init_pcie - init PCIE module
 121  */
 122 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 123 {
 124         u32 data;
 125         u32 pci_cmd;
 126         struct pci_dev *pdev = hw->adapter->pdev;
 127         int pos;
 128
 129         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 130         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 131         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 132                 PCI_COMMAND_IO);
 133         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 134
 135         /*
 136          * Clear any PowerSaveing Settings
 137          */
 138         pci_enable_wake(pdev, PCI_D3hot, 0);
 139         pci_enable_wake(pdev, PCI_D3cold, 0);
 140         /* wol sts read-clear */
 141         AT_READ_REG(hw, REG_WOL_CTRL, &data);
 142         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
 143
 144         /*
 145          * Mask some pcie error bits
 146          */
 147         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 148         pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
 149         data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
 150         pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
 151         /* clear error status */
 152         pci_write_config_word(pdev, pci_pcie_cap(pdev) + PCI_EXP_DEVSTA,
 153                         PCI_EXP_DEVSTA_NFED |
 154                         PCI_EXP_DEVSTA_FED |
 155                         PCI_EXP_DEVSTA_CED |
 156                         PCI_EXP_DEVSTA_URD);
 157
 158         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 159         data &= ~LTSSM_ID_EN_WRO;
 160         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 161
 162         atl1c_pcie_patch(hw);
 163         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 164                 atl1c_disable_l0s_l1(hw);
 165
 166         msleep(5);
 167 }
 168
 169 /*
 170  * atl1c_irq_enable - Enable default interrupt generation settings
 171  * @adapter: board private structure
 172  */
 173 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 174 {
 175         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 176                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 177                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 178                 AT_WRITE_FLUSH(&adapter->hw);
 179         }
 180 }
 181
 182 /*
 183  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 184  * @adapter: board private structure
 185  */
 186 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 187 {
 188         atomic_inc(&adapter->irq_sem);
 189         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 190         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 191         AT_WRITE_FLUSH(&adapter->hw);
 192         synchronize_irq(adapter->pdev->irq);
 193 }
 194
 195 /*
 196  * atl1c_irq_reset - reset interrupt confiure on the NIC
 197  * @adapter: board private structure
 198  */
 199 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 200 {
 201         atomic_set(&adapter->irq_sem, 1);
 202         atl1c_irq_enable(adapter);
 203 }
 204
 205 /*
 206  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 207  * of the idle status register until the device is actually idle
 208  */
 209 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
 210 {
 211         int timeout;
 212         u32 data;
 213
 214         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 215                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 216                 if ((data & modu_ctrl) == 0)
 217                         return 0;
 218                 msleep(1);
 219         }
 220         return data;
 221 }
 222
 223 /*
 224  * atl1c_phy_config - Timer Call-back
 225  * @data: pointer to netdev cast into an unsigned long
 226  */
 227 static void atl1c_phy_config(unsigned long data)
 228 {
 229         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 230         struct atl1c_hw *hw = &adapter->hw;
 231         unsigned long flags;
 232
 233         spin_lock_irqsave(&adapter->mdio_lock, flags);
 234         atl1c_restart_autoneg(hw);
 235         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 236 }
 237
 238 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 239 {
 240         WARN_ON(in_interrupt());
 241         atl1c_down(adapter);
 242         atl1c_up(adapter);
 243         clear_bit(__AT_RESETTING, &adapter->flags);
 244 }
 245
 246 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 247 {
 248         struct atl1c_hw *hw = &adapter->hw;
 249         struct net_device *netdev = adapter->netdev;
 250         struct pci_dev    *pdev   = adapter->pdev;
 251         int err;
 252         unsigned long flags;
 253         u16 speed, duplex, phy_data;
 254
 255         spin_lock_irqsave(&adapter->mdio_lock, flags);
 256         /* MII_BMSR must read twise */
 257         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 258         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 259         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 260
 261         if ((phy_data & BMSR_LSTATUS) == 0) {
 262                 /* link down */
 263                 netif_carrier_off(netdev);
 264                 netif_stop_queue(netdev);
 265                 hw->hibernate = true;
 266                 if (atl1c_reset_mac(hw) != 0)
 267                         if (netif_msg_hw(adapter))
 268                                 dev_warn(&pdev->dev, "reset mac failed\n");
 269                 atl1c_set_aspm(hw, SPEED_0);
 270                 atl1c_post_phy_linkchg(hw, SPEED_0);
 271                 atl1c_reset_dma_ring(adapter);
 272                 atl1c_configure(adapter);
 273         } else {
 274                 /* Link Up */
 275                 hw->hibernate = false;
 276                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 277                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 278                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 279                 if (unlikely(err))
 280                         return;
 281                 /* link result is our setting */
 282                 if (adapter->link_speed != speed ||
 283                     adapter->link_duplex != duplex) {
 284                         adapter->link_speed  = speed;
 285                         adapter->link_duplex = duplex;
 286                         atl1c_set_aspm(hw, speed);
 287                         atl1c_post_phy_linkchg(hw, speed);
 288                         atl1c_start_mac(adapter);
 289                         if (netif_msg_link(adapter))
 290                                 dev_info(&pdev->dev,
 291                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 292                                         atl1c_driver_name, netdev->name,
 293                                         adapter->link_speed,
 294                                         adapter->link_duplex == FULL_DUPLEX ?
 295                                         "Full Duplex" : "Half Duplex");
 296                 }
 297                 if (!netif_carrier_ok(netdev))
 298                         netif_carrier_on(netdev);
 299         }
 300 }
 301
 302 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 303 {
 304         struct net_device *netdev = adapter->netdev;
 305         struct pci_dev    *pdev   = adapter->pdev;
 306         u16 phy_data;
 307         u16 link_up;
 308
 309         spin_lock(&adapter->mdio_lock);
 310         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 311         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 312         spin_unlock(&adapter->mdio_lock);
 313         link_up = phy_data & BMSR_LSTATUS;
 314         /* notify upper layer link down ASAP */
 315         if (!link_up) {
 316                 if (netif_carrier_ok(netdev)) {
 317                         /* old link state: Up */
 318                         netif_carrier_off(netdev);
 319                         if (netif_msg_link(adapter))
 320                                 dev_info(&pdev->dev,
 321                                         "%s: %s NIC Link is Down\n",
 322                                         atl1c_driver_name, netdev->name);
 323                         adapter->link_speed = SPEED_0;
 324                 }
 325         }
 326
 327         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 328         schedule_work(&adapter->common_task);
 329 }
 330
 331 static void atl1c_common_task(struct work_struct *work)
 332 {
 333         struct atl1c_adapter *adapter;
 334         struct net_device *netdev;
 335
 336         adapter = container_of(work, struct atl1c_adapter, common_task);
 337         netdev = adapter->netdev;
 338
 339         if (test_bit(__AT_DOWN, &adapter->flags))
 340                 return;
 341
 342         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 343                 netif_device_detach(netdev);
 344                 atl1c_down(adapter);
 345                 atl1c_up(adapter);
 346                 netif_device_attach(netdev);
 347         }
 348
 349         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 350                 &adapter->work_event)) {
 351                 atl1c_irq_disable(adapter);
 352                 atl1c_check_link_status(adapter);
 353                 atl1c_irq_enable(adapter);
 354         }
 355 }
 356
 357
 358 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 359 {
 360         del_timer_sync(&adapter->phy_config_timer);
 361 }
 362
 363
 364 /*
 365  * atl1c_tx_timeout - Respond to a Tx Hang
 366  * @netdev: network interface device structure
 367  */
 368 static void atl1c_tx_timeout(struct net_device *netdev)
 369 {
 370         struct atl1c_adapter *adapter = netdev_priv(netdev);
 371
 372         /* Do the reset outside of interrupt context */
 373         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 374         schedule_work(&adapter->common_task);
 375 }
 376
 377 /*
 378  * atl1c_set_multi - Multicast and Promiscuous mode set
 379  * @netdev: network interface device structure
 380  *
 381  * The set_multi entry point is called whenever the multicast address
 382  * list or the network interface flags are updated.  This routine is
 383  * responsible for configuring the hardware for proper multicast,
 384  * promiscuous mode, and all-multi behavior.
 385  */
 386 static void atl1c_set_multi(struct net_device *netdev)
 387 {
 388         struct atl1c_adapter *adapter = netdev_priv(netdev);
 389         struct atl1c_hw *hw = &adapter->hw;
 390         struct netdev_hw_addr *ha;
 391         u32 mac_ctrl_data;
 392         u32 hash_value;
 393
 394         /* Check for Promiscuous and All Multicast modes */
 395         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 396
 397         if (netdev->flags & IFF_PROMISC) {
 398                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 399         } else if (netdev->flags & IFF_ALLMULTI) {
 400                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 401                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 402         } else {
 403                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 404         }
 405
 406         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 407
 408         /* clear the old settings from the multicast hash table */
 409         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 410         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 411
 412         /* comoute mc addresses' hash value ,and put it into hash table */
 413         netdev_for_each_mc_addr(ha, netdev) {
 414                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 415                 atl1c_hash_set(hw, hash_value);
 416         }
 417 }
 418
 419 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 420 {
 421         if (features & NETIF_F_HW_VLAN_RX) {
 422                 /* enable VLAN tag insert/strip */
 423                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 424         } else {
 425                 /* disable VLAN tag insert/strip */
 426                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 427         }
 428 }
 429
 430 static void atl1c_vlan_mode(struct net_device *netdev,
 431         netdev_features_t features)
 432 {
 433         struct atl1c_adapter *adapter = netdev_priv(netdev);
 434         struct pci_dev *pdev = adapter->pdev;
 435         u32 mac_ctrl_data = 0;
 436
 437         if (netif_msg_pktdata(adapter))
 438                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 439
 440         atl1c_irq_disable(adapter);
 441         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 442         __atl1c_vlan_mode(features, &mac_ctrl_data);
 443         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 444         atl1c_irq_enable(adapter);
 445 }
 446
 447 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 448 {
 449         struct pci_dev *pdev = adapter->pdev;
 450
 451         if (netif_msg_pktdata(adapter))
 452                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 453         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 454 }
 455
 456 /*
 457  * atl1c_set_mac - Change the Ethernet Address of the NIC
 458  * @netdev: network interface device structure
 459  * @p: pointer to an address structure
 460  *
 461  * Returns 0 on success, negative on failure
 462  */
 463 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 464 {
 465         struct atl1c_adapter *adapter = netdev_priv(netdev);
 466         struct sockaddr *addr = p;
 467
 468         if (!is_valid_ether_addr(addr->sa_data))
 469                 return -EADDRNOTAVAIL;
 470
 471         if (netif_running(netdev))
 472                 return -EBUSY;
 473
 474         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 475         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 476         netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
 477
 478         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
 479
 480         return 0;
 481 }
 482
 483 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 484                                 struct net_device *dev)
 485 {
 486         int mtu = dev->mtu;
 487
 488         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 489                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 490 }
 491
 492 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 493         netdev_features_t features)
 494 {
 495         /*
 496          * Since there is no support for separate rx/tx vlan accel
 497          * enable/disable make sure tx flag is always in same state as rx.
 498          */
 499         if (features & NETIF_F_HW_VLAN_RX)
 500                 features |= NETIF_F_HW_VLAN_TX;
 501         else
 502                 features &= ~NETIF_F_HW_VLAN_TX;
 503
 504         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 505                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 506
 507         return features;
 508 }
 509
 510 static int atl1c_set_features(struct net_device *netdev,
 511         netdev_features_t features)
 512 {
 513         netdev_features_t changed = netdev->features ^ features;
 514
 515         if (changed & NETIF_F_HW_VLAN_RX)
 516                 atl1c_vlan_mode(netdev, features);
 517
 518         return 0;
 519 }
 520
 521 /*
 522  * atl1c_change_mtu - Change the Maximum Transfer Unit
 523  * @netdev: network interface device structure
 524  * @new_mtu: new value for maximum frame size
 525  *
 526  * Returns 0 on success, negative on failure
 527  */
 528 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 529 {
 530         struct atl1c_adapter *adapter = netdev_priv(netdev);
 531         struct atl1c_hw *hw = &adapter->hw;
 532         int old_mtu   = netdev->mtu;
 533         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 534
 535         /* Fast Ethernet controller doesn't support jumbo packet */
 536         if (((hw->nic_type == athr_l2c ||
 537               hw->nic_type == athr_l2c_b ||
 538               hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
 539               max_frame < ETH_ZLEN + ETH_FCS_LEN ||
 540               max_frame > MAX_JUMBO_FRAME_SIZE) {
 541                 if (netif_msg_link(adapter))
 542                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 543                 return -EINVAL;
 544         }
 545         /* set MTU */
 546         if (old_mtu != new_mtu && netif_running(netdev)) {
 547                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 548                         msleep(1);
 549                 netdev->mtu = new_mtu;
 550                 adapter->hw.max_frame_size = new_mtu;
 551                 atl1c_set_rxbufsize(adapter, netdev);
 552                 atl1c_down(adapter);
 553                 netdev_update_features(netdev);
 554                 atl1c_up(adapter);
 555                 clear_bit(__AT_RESETTING, &adapter->flags);
 556         }
 557         return 0;
 558 }
 559
 560 /*
 561  *  caller should hold mdio_lock
 562  */
 563 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 564 {
 565         struct atl1c_adapter *adapter = netdev_priv(netdev);
 566         u16 result;
 567
 568         atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
 569         return result;
 570 }
 571
 572 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 573                              int reg_num, int val)
 574 {
 575         struct atl1c_adapter *adapter = netdev_priv(netdev);
 576
 577         atl1c_write_phy_reg(&adapter->hw, reg_num, val);
 578 }
 579
 580 /*
 581  * atl1c_mii_ioctl -
 582  * @netdev:
 583  * @ifreq:
 584  * @cmd:
 585  */
 586 static int atl1c_mii_ioctl(struct net_device *netdev,
 587                            struct ifreq *ifr, int cmd)
 588 {
 589         struct atl1c_adapter *adapter = netdev_priv(netdev);
 590         struct pci_dev *pdev = adapter->pdev;
 591         struct mii_ioctl_data *data = if_mii(ifr);
 592         unsigned long flags;
 593         int retval = 0;
 594
 595         if (!netif_running(netdev))
 596                 return -EINVAL;
 597
 598         spin_lock_irqsave(&adapter->mdio_lock, flags);
 599         switch (cmd) {
 600         case SIOCGMIIPHY:
 601                 data->phy_id = 0;
 602                 break;
 603
 604         case SIOCGMIIREG:
 605                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 606                                     &data->val_out)) {
 607                         retval = -EIO;
 608                         goto out;
 609                 }
 610                 break;
 611
 612         case SIOCSMIIREG:
 613                 if (data->reg_num & ~(0x1F)) {
 614                         retval = -EFAULT;
 615                         goto out;
 616                 }
 617
 618                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 619                                 data->reg_num, data->val_in);
 620                 if (atl1c_write_phy_reg(&adapter->hw,
 621                                      data->reg_num, data->val_in)) {
 622                         retval = -EIO;
 623                         goto out;
 624                 }
 625                 break;
 626
 627         default:
 628                 retval = -EOPNOTSUPP;
 629                 break;
 630         }
 631 out:
 632         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 633         return retval;
 634 }
 635
 636 /*
 637  * atl1c_ioctl -
 638  * @netdev:
 639  * @ifreq:
 640  * @cmd:
 641  */
 642 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 643 {
 644         switch (cmd) {
 645         case SIOCGMIIPHY:
 646         case SIOCGMIIREG:
 647         case SIOCSMIIREG:
 648                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 649         default:
 650                 return -EOPNOTSUPP;
 651         }
 652 }
 653
 654 /*
 655  * atl1c_alloc_queues - Allocate memory for all rings
 656  * @adapter: board private structure to initialize
 657  *
 658  */
 659 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 660 {
 661         return 0;
 662 }
 663
 664 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 665 {
 666         switch (hw->device_id) {
 667         case PCI_DEVICE_ID_ATTANSIC_L2C:
 668                 hw->nic_type = athr_l2c;
 669                 break;
 670         case PCI_DEVICE_ID_ATTANSIC_L1C:
 671                 hw->nic_type = athr_l1c;
 672                 break;
 673         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 674                 hw->nic_type = athr_l2c_b;
 675                 break;
 676         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 677                 hw->nic_type = athr_l2c_b2;
 678                 break;
 679         case PCI_DEVICE_ID_ATHEROS_L1D:
 680                 hw->nic_type = athr_l1d;
 681                 break;
 682         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 683                 hw->nic_type = athr_l1d_2;
 684                 break;
 685         default:
 686                 break;
 687         }
 688 }
 689
 690 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 691 {
 692         u32 link_ctrl_data;
 693
 694         atl1c_set_mac_type(hw);
 695         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 696
 697         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 698                          ATL1C_TXQ_MODE_ENHANCE;
 699         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 700                           ATL1C_ASPM_L1_SUPPORT;
 701         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 702
 703         if (hw->nic_type == athr_l1c ||
 704             hw->nic_type == athr_l1d ||
 705             hw->nic_type == athr_l1d_2)
 706                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 707         return 0;
 708 }
 709
 710 struct atl1c_platform_patch {
 711         u16 pci_did;
 712         u8  pci_revid;
 713         u16 subsystem_vid;
 714         u16 subsystem_did;
 715         u32 patch_flag;
 716 #define ATL1C_LINK_PATCH        0x1
 717 };
 718 static const struct atl1c_platform_patch plats[] __devinitdata = {
 719 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
 720 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
 721 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
 722 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
 723 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
 724 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
 725 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
 726 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
 727 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
 728 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
 729 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
 730 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
 731 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
 732 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
 733 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
 734 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
 735 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
 736 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
 737 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
 738 {0},
 739 };
 740
 741 static void __devinit atl1c_patch_assign(struct atl1c_hw *hw)
 742 {
 743         int i = 0;
 744
 745         hw->msi_lnkpatch = false;
 746
 747         while (plats[i].pci_did != 0) {
 748                 if (plats[i].pci_did == hw->device_id &&
 749                     plats[i].pci_revid == hw->revision_id &&
 750                     plats[i].subsystem_vid == hw->subsystem_vendor_id &&
 751                     plats[i].subsystem_did == hw->subsystem_id) {
 752                         if (plats[i].patch_flag & ATL1C_LINK_PATCH)
 753                                 hw->msi_lnkpatch = true;
 754                 }
 755                 i++;
 756         }
 757 }
 758 /*
 759  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 760  * @adapter: board private structure to initialize
 761  *
 762  * atl1c_sw_init initializes the Adapter private data structure.
 763  * Fields are initialized based on PCI device information and
 764  * OS network device settings (MTU size).
 765  */
 766 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 767 {
 768         struct atl1c_hw *hw   = &adapter->hw;
 769         struct pci_dev  *pdev = adapter->pdev;
 770         u32 revision;
 771
 772
 773         adapter->wol = 0;
 774         device_set_wakeup_enable(&pdev->dev, false);
 775         adapter->link_speed = SPEED_0;
 776         adapter->link_duplex = FULL_DUPLEX;
 777         adapter->tpd_ring[0].count = 1024;
 778         adapter->rfd_ring.count = 512;
 779
 780         hw->vendor_id = pdev->vendor;
 781         hw->device_id = pdev->device;
 782         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 783         hw->subsystem_id = pdev->subsystem_device;
 784         AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
 785         hw->revision_id = revision & 0xFF;
 786         /* before link up, we assume hibernate is true */
 787         hw->hibernate = true;
 788         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 789         if (atl1c_setup_mac_funcs(hw) != 0) {
 790                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 791                 return -1;
 792         }
 793         atl1c_patch_assign(hw);
 794
 795         hw->intr_mask = IMR_NORMAL_MASK;
 796         hw->phy_configured = false;
 797         hw->preamble_len = 7;
 798         hw->max_frame_size = adapter->netdev->mtu;
 799         hw->autoneg_advertised = ADVERTISED_Autoneg;
 800         hw->indirect_tab = 0xE4E4E4E4;
 801         hw->base_cpu = 0;
 802
 803         hw->ict = 50000;                /* 100ms */
 804         hw->smb_timer = 200000;         /* 400ms */
 805         hw->rx_imt = 200;
 806         hw->tx_imt = 1000;
 807
 808         hw->tpd_burst = 5;
 809         hw->rfd_burst = 8;
 810         hw->dma_order = atl1c_dma_ord_out;
 811         hw->dmar_block = atl1c_dma_req_1024;
 812
 813         if (atl1c_alloc_queues(adapter)) {
 814                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 815                 return -ENOMEM;
 816         }
 817         /* TODO */
 818         atl1c_set_rxbufsize(adapter, adapter->netdev);
 819         atomic_set(&adapter->irq_sem, 1);
 820         spin_lock_init(&adapter->mdio_lock);
 821         spin_lock_init(&adapter->tx_lock);
 822         set_bit(__AT_DOWN, &adapter->flags);
 823
 824         return 0;
 825 }
 826
 827 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 828                                 struct atl1c_buffer *buffer_info, int in_irq)
 829 {
 830         u16 pci_driection;
 831         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 832                 return;
 833         if (buffer_info->dma) {
 834                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 835                         pci_driection = PCI_DMA_FROMDEVICE;
 836                 else
 837                         pci_driection = PCI_DMA_TODEVICE;
 838
 839                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 840                         pci_unmap_single(pdev, buffer_info->dma,
 841                                         buffer_info->length, pci_driection);
 842                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 843                         pci_unmap_page(pdev, buffer_info->dma,
 844                                         buffer_info->length, pci_driection);
 845         }
 846         if (buffer_info->skb) {
 847                 if (in_irq)
 848                         dev_kfree_skb_irq(buffer_info->skb);
 849                 else
 850                         dev_kfree_skb(buffer_info->skb);
 851         }
 852         buffer_info->dma = 0;
 853         buffer_info->skb = NULL;
 854         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 855 }
 856 /*
 857  * atl1c_clean_tx_ring - Free Tx-skb
 858  * @adapter: board private structure
 859  */
 860 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 861                                 enum atl1c_trans_queue type)
 862 {
 863         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 864         struct atl1c_buffer *buffer_info;
 865         struct pci_dev *pdev = adapter->pdev;
 866         u16 index, ring_count;
 867
 868         ring_count = tpd_ring->count;
 869         for (index = 0; index < ring_count; index++) {
 870                 buffer_info = &tpd_ring->buffer_info[index];
 871                 atl1c_clean_buffer(pdev, buffer_info, 0);
 872         }
 873
 874         /* Zero out Tx-buffers */
 875         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 876                 ring_count);
 877         atomic_set(&tpd_ring->next_to_clean, 0);
 878         tpd_ring->next_to_use = 0;
 879 }
 880
 881 /*
 882  * atl1c_clean_rx_ring - Free rx-reservation skbs
 883  * @adapter: board private structure
 884  */
 885 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 886 {
 887         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 888         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 889         struct atl1c_buffer *buffer_info;
 890         struct pci_dev *pdev = adapter->pdev;
 891         int j;
 892
 893         for (j = 0; j < rfd_ring->count; j++) {
 894                 buffer_info = &rfd_ring->buffer_info[j];
 895                 atl1c_clean_buffer(pdev, buffer_info, 0);
 896         }
 897         /* zero out the descriptor ring */
 898         memset(rfd_ring->desc, 0, rfd_ring->size);
 899         rfd_ring->next_to_clean = 0;
 900         rfd_ring->next_to_use = 0;
 901         rrd_ring->next_to_use = 0;
 902         rrd_ring->next_to_clean = 0;
 903 }
 904
 905 /*
 906  * Read / Write Ptr Initialize:
 907  */
 908 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 909 {
 910         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 911         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 912         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 913         struct atl1c_buffer *buffer_info;
 914         int i, j;
 915
 916         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 917                 tpd_ring[i].next_to_use = 0;
 918                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 919                 buffer_info = tpd_ring[i].buffer_info;
 920                 for (j = 0; j < tpd_ring->count; j++)
 921                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 922                                         ATL1C_BUFFER_FREE);
 923         }
 924         rfd_ring->next_to_use = 0;
 925         rfd_ring->next_to_clean = 0;
 926         rrd_ring->next_to_use = 0;
 927         rrd_ring->next_to_clean = 0;
 928         for (j = 0; j < rfd_ring->count; j++) {
 929                 buffer_info = &rfd_ring->buffer_info[j];
 930                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 931         }
 932 }
 933
 934 /*
 935  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 936  * @adapter: board private structure
 937  *
 938  * Free all transmit software resources
 939  */
 940 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 941 {
 942         struct pci_dev *pdev = adapter->pdev;
 943
 944         pci_free_consistent(pdev, adapter->ring_header.size,
 945                                         adapter->ring_header.desc,
 946                                         adapter->ring_header.dma);
 947         adapter->ring_header.desc = NULL;
 948
 949         /* Note: just free tdp_ring.buffer_info,
 950         *  it contain rfd_ring.buffer_info, do not double free */
 951         if (adapter->tpd_ring[0].buffer_info) {
 952                 kfree(adapter->tpd_ring[0].buffer_info);
 953                 adapter->tpd_ring[0].buffer_info = NULL;
 954         }
 955 }
 956
 957 /*
 958  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 959  * @adapter: board private structure
 960  *
 961  * Return 0 on success, negative on failure
 962  */
 963 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 964 {
 965         struct pci_dev *pdev = adapter->pdev;
 966         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 967         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 968         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 969         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 970         int size;
 971         int i;
 972         int count = 0;
 973         int rx_desc_count = 0;
 974         u32 offset = 0;
 975
 976         rrd_ring->count = rfd_ring->count;
 977         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 978                 tpd_ring[i].count = tpd_ring[0].count;
 979
 980         /* 2 tpd queue, one high priority queue,
 981          * another normal priority queue */
 982         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 983                 rfd_ring->count);
 984         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 985         if (unlikely(!tpd_ring->buffer_info)) {
 986                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 987                         size);
 988                 goto err_nomem;
 989         }
 990         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 991                 tpd_ring[i].buffer_info =
 992                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 993                 count += tpd_ring[i].count;
 994         }
 995
 996         rfd_ring->buffer_info =
 997                 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 998         count += rfd_ring->count;
 999         rx_desc_count += rfd_ring->count;
1000
1001         /*
1002          * real ring DMA buffer
1003          * each ring/block may need up to 8 bytes for alignment, hence the
1004          * additional bytes tacked onto the end.
1005          */
1006         ring_header->size = size =
1007                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1008                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1009                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1010                 8 * 4;
1011
1012         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1013                                 &ring_header->dma);
1014         if (unlikely(!ring_header->desc)) {
1015                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1016                 goto err_nomem;
1017         }
1018         memset(ring_header->desc, 0, ring_header->size);
1019         /* init TPD ring */
1020
1021         tpd_ring[0].dma = roundup(ring_header->dma, 8);
1022         offset = tpd_ring[0].dma - ring_header->dma;
1023         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1024                 tpd_ring[i].dma = ring_header->dma + offset;
1025                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1026                 tpd_ring[i].size =
1027                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1028                 offset += roundup(tpd_ring[i].size, 8);
1029         }
1030         /* init RFD ring */
1031         rfd_ring->dma = ring_header->dma + offset;
1032         rfd_ring->desc = (u8 *) ring_header->desc + offset;
1033         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1034         offset += roundup(rfd_ring->size, 8);
1035
1036         /* init RRD ring */
1037         rrd_ring->dma = ring_header->dma + offset;
1038         rrd_ring->desc = (u8 *) ring_header->desc + offset;
1039         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1040                 rrd_ring->count;
1041         offset += roundup(rrd_ring->size, 8);
1042
1043         return 0;
1044
1045 err_nomem:
1046         kfree(tpd_ring->buffer_info);
1047         return -ENOMEM;
1048 }
1049
1050 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1051 {
1052         struct atl1c_hw *hw = &adapter->hw;
1053         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1054         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1055         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1056                                 adapter->tpd_ring;
1057
1058         /* TPD */
1059         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1060                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1061                                 AT_DMA_HI_ADDR_MASK) >> 32));
1062         /* just enable normal priority TX queue */
1063         AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1064                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1065                                 AT_DMA_LO_ADDR_MASK));
1066         AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1067                         (u32)(tpd_ring[atl1c_trans_high].dma &
1068                                 AT_DMA_LO_ADDR_MASK));
1069         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1070                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1071
1072
1073         /* RFD */
1074         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1075                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1076         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1077                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1078
1079         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1080                         rfd_ring->count & RFD_RING_SIZE_MASK);
1081         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1082                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1083
1084         /* RRD */
1085         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1086                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1087         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1088                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1089
1090         if (hw->nic_type == athr_l2c_b) {
1091                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1092                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1093                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1094                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1095                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1096                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1097                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1098                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1099         }
1100         /* Load all of base address above */
1101         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1102 }
1103
1104 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1105 {
1106         struct atl1c_hw *hw = &adapter->hw;
1107         int max_pay_load;
1108         u16 tx_offload_thresh;
1109         u32 txq_ctrl_data;
1110
1111         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1112         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1113                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1114         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1115         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1116         /*
1117          * if BIOS had changed the dam-read-max-length to an invalid value,
1118          * restore it to default value
1119          */
1120         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1121                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1122                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1123         }
1124         txq_ctrl_data =
1125                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1126                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1127
1128         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1129 }
1130
1131 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1132 {
1133         struct atl1c_hw *hw = &adapter->hw;
1134         u32 rxq_ctrl_data;
1135
1136         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1137                         RXQ_RFD_BURST_NUM_SHIFT;
1138
1139         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1140                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1141
1142         /* aspm for gigabit */
1143         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1144                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1145                         ASPM_THRUPUT_LIMIT_100M);
1146
1147         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1148 }
1149
1150 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1151 {
1152         struct atl1c_hw *hw = &adapter->hw;
1153         u32 dma_ctrl_data;
1154
1155         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1156                 DMA_CTRL_RREQ_PRI_DATA |
1157                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1158                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1159                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1160
1161         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1162 }
1163
1164 /*
1165  * Stop the mac, transmit and receive units
1166  * hw - Struct containing variables accessed by shared code
1167  * return : 0  or  idle status (if error)
1168  */
1169 static int atl1c_stop_mac(struct atl1c_hw *hw)
1170 {
1171         u32 data;
1172
1173         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1174         data &= ~RXQ_CTRL_EN;
1175         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1176
1177         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1178         data &= ~TXQ_CTRL_EN;
1179         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1180
1181         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1182
1183         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1184         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1185         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1186
1187         return (int)atl1c_wait_until_idle(hw,
1188                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1189 }
1190
1191 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1192 {
1193         struct atl1c_hw *hw = &adapter->hw;
1194         u32 mac, txq, rxq;
1195
1196         hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1197         hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1198                 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1199
1200         AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1201         AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1202         AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1203
1204         txq |= TXQ_CTRL_EN;
1205         rxq |= RXQ_CTRL_EN;
1206         mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1207                MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1208                MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1209                MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1210                MAC_CTRL_HASH_ALG_CRC32;
1211         if (hw->mac_duplex)
1212                 mac |= MAC_CTRL_DUPLX;
1213         else
1214                 mac &= ~MAC_CTRL_DUPLX;
1215         mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1216         mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1217
1218         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1219         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1220         AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1221 }
1222
1223 /*
1224  * Reset the transmit and receive units; mask and clear all interrupts.
1225  * hw - Struct containing variables accessed by shared code
1226  * return : 0  or  idle status (if error)
1227  */
1228 static int atl1c_reset_mac(struct atl1c_hw *hw)
1229 {
1230         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1231         struct pci_dev *pdev = adapter->pdev;
1232         u32 ctrl_data = 0;
1233
1234         atl1c_stop_mac(hw);
1235         /*
1236          * Issue Soft Reset to the MAC.  This will reset the chip's
1237          * transmit, receive, DMA.  It will not effect
1238          * the current PCI configuration.  The global reset bit is self-
1239          * clearing, and should clear within a microsecond.
1240          */
1241         AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1242         ctrl_data |= MASTER_CTRL_OOB_DIS;
1243         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1244
1245         AT_WRITE_FLUSH(hw);
1246         msleep(10);
1247         /* Wait at least 10ms for All module to be Idle */
1248
1249         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1250                 dev_err(&pdev->dev,
1251                         "MAC state machine can't be idle since"
1252                         " disabled for 10ms second\n");
1253                 return -1;
1254         }
1255         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1256
1257         /* driver control speed/duplex */
1258         AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1259         AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1260
1261         /* clk switch setting */
1262         AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1263         switch (hw->nic_type) {
1264         case athr_l2c_b:
1265                 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1266                                 SERDES_MAC_CLK_SLOWDOWN);
1267                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1268                 break;
1269         case athr_l2c_b2:
1270         case athr_l1d_2:
1271                 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1272                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1273                 break;
1274         default:
1275                 break;
1276         }
1277
1278         return 0;
1279 }
1280
1281 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1282 {
1283         u16 ctrl_flags = hw->ctrl_flags;
1284
1285         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1286         atl1c_set_aspm(hw, SPEED_0);
1287         hw->ctrl_flags = ctrl_flags;
1288 }
1289
1290 /*
1291  * Set ASPM state.
1292  * Enable/disable L0s/L1 depend on link state.
1293  */
1294 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1295 {
1296         u32 pm_ctrl_data;
1297         u32 link_l1_timer;
1298
1299         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1300         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1301                           PM_CTRL_ASPM_L0S_EN |
1302                           PM_CTRL_MAC_ASPM_CHK);
1303         /* L1 timer */
1304         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1305                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1306                 link_l1_timer =
1307                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1308                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1309                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1310                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1311         } else {
1312                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1313                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1314                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1315                         link_l1_timer = 1;
1316                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1317                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1318         }
1319
1320         /* L0S/L1 enable */
1321         if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1322                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1323         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1324                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1325
1326         /* l2cb & l1d & l2cb2 & l1d2 */
1327         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1328             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1329                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1330                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1331                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1332                                 PM_CTRL_SERDES_PD_EX_L1 |
1333                                 PM_CTRL_CLK_SWH_L1;
1334                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1335                                   PM_CTRL_SERDES_PLL_L1_EN |
1336                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1337                                   PM_CTRL_SA_DLY_EN |
1338                                   PM_CTRL_HOTRST);
1339                 /* disable l0s if link down or l2cb */
1340                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1341                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1342         } else { /* l1c */
1343                 pm_ctrl_data =
1344                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1345                 if (link_speed != SPEED_0) {
1346                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1347                                         PM_CTRL_SERDES_PLL_L1_EN |
1348                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1349                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1350                                           PM_CTRL_CLK_SWH_L1 |
1351                                           PM_CTRL_ASPM_L0S_EN |
1352                                           PM_CTRL_ASPM_L1_EN);
1353                 } else { /* link down */
1354                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1355                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1356                                           PM_CTRL_SERDES_PLL_L1_EN |
1357                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1358                                           PM_CTRL_ASPM_L0S_EN);
1359                 }
1360         }
1361         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1362
1363         return;
1364 }
1365
1366 /*
1367  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1368  * @adapter: board private structure
1369  *
1370  * Configure the Tx /Rx unit of the MAC after a reset.
1371  */
1372 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1373 {
1374         struct atl1c_hw *hw = &adapter->hw;
1375         u32 master_ctrl_data = 0;
1376         u32 intr_modrt_data;
1377         u32 data;
1378
1379         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1380         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1381                               MASTER_CTRL_RX_ITIMER_EN |
1382                               MASTER_CTRL_INT_RDCLR);
1383         /* clear interrupt status */
1384         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1385         /*  Clear any WOL status */
1386         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1387         /* set Interrupt Clear Timer
1388          * HW will enable self to assert interrupt event to system after
1389          * waiting x-time for software to notify it accept interrupt.
1390          */
1391
1392         data = CLK_GATING_EN_ALL;
1393         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1394                 if (hw->nic_type == athr_l2c_b)
1395                         data &= ~CLK_GATING_RXMAC_EN;
1396         } else
1397                 data = 0;
1398         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1399
1400         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1401                 hw->ict & INT_RETRIG_TIMER_MASK);
1402
1403         atl1c_configure_des_ring(adapter);
1404
1405         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1406                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1407                                         IRQ_MODRT_TX_TIMER_SHIFT;
1408                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1409                                         IRQ_MODRT_RX_TIMER_SHIFT;
1410                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1411                 master_ctrl_data |=
1412                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1413         }
1414
1415         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1416                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1417
1418         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1419         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1420
1421         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1422                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1423
1424         /* set MTU */
1425         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1426                         VLAN_HLEN + ETH_FCS_LEN);
1427
1428         atl1c_configure_tx(adapter);
1429         atl1c_configure_rx(adapter);
1430         atl1c_configure_dma(adapter);
1431
1432         return 0;
1433 }
1434
1435 static int atl1c_configure(struct atl1c_adapter *adapter)
1436 {
1437         struct net_device *netdev = adapter->netdev;
1438         int num;
1439
1440         atl1c_init_ring_ptrs(adapter);
1441         atl1c_set_multi(netdev);
1442         atl1c_restore_vlan(adapter);
1443
1444         num = atl1c_alloc_rx_buffer(adapter);
1445         if (unlikely(num == 0))
1446                 return -ENOMEM;
1447
1448         if (atl1c_configure_mac(adapter))
1449                 return -EIO;
1450
1451         return 0;
1452 }
1453
1454 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1455 {
1456         u16 hw_reg_addr = 0;
1457         unsigned long *stats_item = NULL;
1458         u32 data;
1459
1460         /* update rx status */
1461         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1462         stats_item  = &adapter->hw_stats.rx_ok;
1463         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1464                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1465                 *stats_item += data;
1466                 stats_item++;
1467                 hw_reg_addr += 4;
1468         }
1469 /* update tx status */
1470         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1471         stats_item  = &adapter->hw_stats.tx_ok;
1472         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1473                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1474                 *stats_item += data;
1475                 stats_item++;
1476                 hw_reg_addr += 4;
1477         }
1478 }
1479
1480 /*
1481  * atl1c_get_stats - Get System Network Statistics
1482  * @netdev: network interface device structure
1483  *
1484  * Returns the address of the device statistics structure.
1485  * The statistics are actually updated from the timer callback.
1486  */
1487 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1488 {
1489         struct atl1c_adapter *adapter = netdev_priv(netdev);
1490         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1491         struct net_device_stats *net_stats = &netdev->stats;
1492
1493         atl1c_update_hw_stats(adapter);
1494         net_stats->rx_packets = hw_stats->rx_ok;
1495         net_stats->tx_packets = hw_stats->tx_ok;
1496         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1497         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1498         net_stats->multicast  = hw_stats->rx_mcast;
1499         net_stats->collisions = hw_stats->tx_1_col +
1500                                 hw_stats->tx_2_col * 2 +
1501                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1502         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1503                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1504                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1505         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1506         net_stats->rx_length_errors = hw_stats->rx_len_err;
1507         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1508         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1509         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1510
1511         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1512
1513         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1514                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1515         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1516         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1517         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1518
1519         return net_stats;
1520 }
1521
1522 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1523 {
1524         u16 phy_data;
1525
1526         spin_lock(&adapter->mdio_lock);
1527         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1528         spin_unlock(&adapter->mdio_lock);
1529 }
1530
1531 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1532                                 enum atl1c_trans_queue type)
1533 {
1534         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1535                                 &adapter->tpd_ring[type];
1536         struct atl1c_buffer *buffer_info;
1537         struct pci_dev *pdev = adapter->pdev;
1538         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1539         u16 hw_next_to_clean;
1540         u16 reg;
1541
1542         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1543
1544         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1545
1546         while (next_to_clean != hw_next_to_clean) {
1547                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1548                 atl1c_clean_buffer(pdev, buffer_info, 1);
1549                 if (++next_to_clean == tpd_ring->count)
1550                         next_to_clean = 0;
1551                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1552         }
1553
1554         if (netif_queue_stopped(adapter->netdev) &&
1555                         netif_carrier_ok(adapter->netdev)) {
1556                 netif_wake_queue(adapter->netdev);
1557         }
1558
1559         return true;
1560 }
1561
1562 /*
1563  * atl1c_intr - Interrupt Handler
1564  * @irq: interrupt number
1565  * @data: pointer to a network interface device structure
1566  * @pt_regs: CPU registers structure
1567  */
1568 static irqreturn_t atl1c_intr(int irq, void *data)
1569 {
1570         struct net_device *netdev  = data;
1571         struct atl1c_adapter *adapter = netdev_priv(netdev);
1572         struct pci_dev *pdev = adapter->pdev;
1573         struct atl1c_hw *hw = &adapter->hw;
1574         int max_ints = AT_MAX_INT_WORK;
1575         int handled = IRQ_NONE;
1576         u32 status;
1577         u32 reg_data;
1578
1579         do {
1580                 AT_READ_REG(hw, REG_ISR, &reg_data);
1581                 status = reg_data & hw->intr_mask;
1582
1583                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1584                         if (max_ints != AT_MAX_INT_WORK)
1585                                 handled = IRQ_HANDLED;
1586                         break;
1587                 }
1588                 /* link event */
1589                 if (status & ISR_GPHY)
1590                         atl1c_clear_phy_int(adapter);
1591                 /* Ack ISR */
1592                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1593                 if (status & ISR_RX_PKT) {
1594                         if (likely(napi_schedule_prep(&adapter->napi))) {
1595                                 hw->intr_mask &= ~ISR_RX_PKT;
1596                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1597                                 __napi_schedule(&adapter->napi);
1598                         }
1599                 }
1600                 if (status & ISR_TX_PKT)
1601                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1602
1603                 handled = IRQ_HANDLED;
1604                 /* check if PCIE PHY Link down */
1605                 if (status & ISR_ERROR) {
1606                         if (netif_msg_hw(adapter))
1607                                 dev_err(&pdev->dev,
1608                                         "atl1c hardware error (status = 0x%x)\n",
1609                                         status & ISR_ERROR);
1610                         /* reset MAC */
1611                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1612                         schedule_work(&adapter->common_task);
1613                         return IRQ_HANDLED;
1614                 }
1615
1616                 if (status & ISR_OVER)
1617                         if (netif_msg_intr(adapter))
1618                                 dev_warn(&pdev->dev,
1619                                         "TX/RX overflow (status = 0x%x)\n",
1620                                         status & ISR_OVER);
1621
1622                 /* link event */
1623                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1624                         netdev->stats.tx_carrier_errors++;
1625                         atl1c_link_chg_event(adapter);
1626                         break;
1627                 }
1628
1629         } while (--max_ints > 0);
1630         /* re-enable Interrupt*/
1631         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1632         return handled;
1633 }
1634
1635 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1636                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1637 {
1638         /*
1639          * The pid field in RRS in not correct sometimes, so we
1640          * cannot figure out if the packet is fragmented or not,
1641          * so we tell the KERNEL CHECKSUM_NONE
1642          */
1643         skb_checksum_none_assert(skb);
1644 }
1645
1646 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1647 {
1648         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1649         struct pci_dev *pdev = adapter->pdev;
1650         struct atl1c_buffer *buffer_info, *next_info;
1651         struct sk_buff *skb;
1652         void *vir_addr = NULL;
1653         u16 num_alloc = 0;
1654         u16 rfd_next_to_use, next_next;
1655         struct atl1c_rx_free_desc *rfd_desc;
1656
1657         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1658         if (++next_next == rfd_ring->count)
1659                 next_next = 0;
1660         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1661         next_info = &rfd_ring->buffer_info[next_next];
1662
1663         while (next_info->flags & ATL1C_BUFFER_FREE) {
1664                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1665
1666                 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len);
1667                 if (unlikely(!skb)) {
1668                         if (netif_msg_rx_err(adapter))
1669                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1670                         break;
1671                 }
1672
1673                 /*
1674                  * Make buffer alignment 2 beyond a 16 byte boundary
1675                  * this will result in a 16 byte aligned IP header after
1676                  * the 14 byte MAC header is removed
1677                  */
1678                 vir_addr = skb->data;
1679                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1680                 buffer_info->skb = skb;
1681                 buffer_info->length = adapter->rx_buffer_len;
1682                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1683                                                 buffer_info->length,
1684                                                 PCI_DMA_FROMDEVICE);
1685                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1686                         ATL1C_PCIMAP_FROMDEVICE);
1687                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1688                 rfd_next_to_use = next_next;
1689                 if (++next_next == rfd_ring->count)
1690                         next_next = 0;
1691                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1692                 next_info = &rfd_ring->buffer_info[next_next];
1693                 num_alloc++;
1694         }
1695
1696         if (num_alloc) {
1697                 /* TODO: update mailbox here */
1698                 wmb();
1699                 rfd_ring->next_to_use = rfd_next_to_use;
1700                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1701                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1702         }
1703
1704         return num_alloc;
1705 }
1706
1707 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1708                         struct  atl1c_recv_ret_status *rrs, u16 num)
1709 {
1710         u16 i;
1711         /* the relationship between rrd and rfd is one map one */
1712         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1713                                         rrd_ring->next_to_clean)) {
1714                 rrs->word3 &= ~RRS_RXD_UPDATED;
1715                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1716                         rrd_ring->next_to_clean = 0;
1717         }
1718 }
1719
1720 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1721         struct atl1c_recv_ret_status *rrs, u16 num)
1722 {
1723         u16 i;
1724         u16 rfd_index;
1725         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1726
1727         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1728                         RRS_RX_RFD_INDEX_MASK;
1729         for (i = 0; i < num; i++) {
1730                 buffer_info[rfd_index].skb = NULL;
1731                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1732                                         ATL1C_BUFFER_FREE);
1733                 if (++rfd_index == rfd_ring->count)
1734                         rfd_index = 0;
1735         }
1736         rfd_ring->next_to_clean = rfd_index;
1737 }
1738
1739 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1740                    int *work_done, int work_to_do)
1741 {
1742         u16 rfd_num, rfd_index;
1743         u16 count = 0;
1744         u16 length;
1745         struct pci_dev *pdev = adapter->pdev;
1746         struct net_device *netdev  = adapter->netdev;
1747         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1748         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1749         struct sk_buff *skb;
1750         struct atl1c_recv_ret_status *rrs;
1751         struct atl1c_buffer *buffer_info;
1752
1753         while (1) {
1754                 if (*work_done >= work_to_do)
1755                         break;
1756                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1757                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1758                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1759                                 RRS_RX_RFD_CNT_MASK;
1760                         if (unlikely(rfd_num != 1))
1761                                 /* TODO support mul rfd*/
1762                                 if (netif_msg_rx_err(adapter))
1763                                         dev_warn(&pdev->dev,
1764                                                 "Multi rfd not support yet!\n");
1765                         goto rrs_checked;
1766                 } else {
1767                         break;
1768                 }
1769 rrs_checked:
1770                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1771                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1772                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1773                                 if (netif_msg_rx_err(adapter))
1774                                         dev_warn(&pdev->dev,
1775                                                 "wrong packet! rrs word3 is %x\n",
1776                                                 rrs->word3);
1777                         continue;
1778                 }
1779
1780                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1781                                 RRS_PKT_SIZE_MASK);
1782                 /* Good Receive */
1783                 if (likely(rfd_num == 1)) {
1784                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1785                                         RRS_RX_RFD_INDEX_MASK;
1786                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1787                         pci_unmap_single(pdev, buffer_info->dma,
1788                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1789                         skb = buffer_info->skb;
1790                 } else {
1791                         /* TODO */
1792                         if (netif_msg_rx_err(adapter))
1793                                 dev_warn(&pdev->dev,
1794                                         "Multi rfd not support yet!\n");
1795                         break;
1796                 }
1797                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1798                 skb_put(skb, length - ETH_FCS_LEN);
1799                 skb->protocol = eth_type_trans(skb, netdev);
1800                 atl1c_rx_checksum(adapter, skb, rrs);
1801                 if (rrs->word3 & RRS_VLAN_INS) {
1802                         u16 vlan;
1803
1804                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1805                         vlan = le16_to_cpu(vlan);
1806                         __vlan_hwaccel_put_tag(skb, vlan);
1807                 }
1808                 netif_receive_skb(skb);
1809
1810                 (*work_done)++;
1811                 count++;
1812         }
1813         if (count)
1814                 atl1c_alloc_rx_buffer(adapter);
1815 }
1816
1817 /*
1818  * atl1c_clean - NAPI Rx polling callback
1819  * @adapter: board private structure
1820  */
1821 static int atl1c_clean(struct napi_struct *napi, int budget)
1822 {
1823         struct atl1c_adapter *adapter =
1824                         container_of(napi, struct atl1c_adapter, napi);
1825         int work_done = 0;
1826
1827         /* Keep link state information with original netdev */
1828         if (!netif_carrier_ok(adapter->netdev))
1829                 goto quit_polling;
1830         /* just enable one RXQ */
1831         atl1c_clean_rx_irq(adapter, &work_done, budget);
1832
1833         if (work_done < budget) {
1834 quit_polling:
1835                 napi_complete(napi);
1836                 adapter->hw.intr_mask |= ISR_RX_PKT;
1837                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1838         }
1839         return work_done;
1840 }
1841
1842 #ifdef CONFIG_NET_POLL_CONTROLLER
1843
1844 /*
1845  * Polling 'interrupt' - used by things like netconsole to send skbs
1846  * without having to re-enable interrupts. It's not called while
1847  * the interrupt routine is executing.
1848  */
1849 static void atl1c_netpoll(struct net_device *netdev)
1850 {
1851         struct atl1c_adapter *adapter = netdev_priv(netdev);
1852
1853         disable_irq(adapter->pdev->irq);
1854         atl1c_intr(adapter->pdev->irq, netdev);
1855         enable_irq(adapter->pdev->irq);
1856 }
1857 #endif
1858
1859 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1860 {
1861         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1862         u16 next_to_use = 0;
1863         u16 next_to_clean = 0;
1864
1865         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1866         next_to_use   = tpd_ring->next_to_use;
1867
1868         return (u16)(next_to_clean > next_to_use) ?
1869                 (next_to_clean - next_to_use - 1) :
1870                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1871 }
1872
1873 /*
1874  * get next usable tpd
1875  * Note: should call atl1c_tdp_avail to make sure
1876  * there is enough tpd to use
1877  */
1878 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1879         enum atl1c_trans_queue type)
1880 {
1881         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1882         struct atl1c_tpd_desc *tpd_desc;
1883         u16 next_to_use = 0;
1884
1885         next_to_use = tpd_ring->next_to_use;
1886         if (++tpd_ring->next_to_use == tpd_ring->count)
1887                 tpd_ring->next_to_use = 0;
1888         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1889         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1890         return  tpd_desc;
1891 }
1892
1893 static struct atl1c_buffer *
1894 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1895 {
1896         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1897
1898         return &tpd_ring->buffer_info[tpd -
1899                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1900 }
1901
1902 /* Calculate the transmit packet descript needed*/
1903 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1904 {
1905         u16 tpd_req;
1906         u16 proto_hdr_len = 0;
1907
1908         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1909
1910         if (skb_is_gso(skb)) {
1911                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1912                 if (proto_hdr_len < skb_headlen(skb))
1913                         tpd_req++;
1914                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1915                         tpd_req++;
1916         }
1917         return tpd_req;
1918 }
1919
1920 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1921                           struct sk_buff *skb,
1922                           struct atl1c_tpd_desc **tpd,
1923                           enum atl1c_trans_queue type)
1924 {
1925         struct pci_dev *pdev = adapter->pdev;
1926         u8 hdr_len;
1927         u32 real_len;
1928         unsigned short offload_type;
1929         int err;
1930
1931         if (skb_is_gso(skb)) {
1932                 if (skb_header_cloned(skb)) {
1933                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1934                         if (unlikely(err))
1935                                 return -1;
1936                 }
1937                 offload_type = skb_shinfo(skb)->gso_type;
1938
1939                 if (offload_type & SKB_GSO_TCPV4) {
1940                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1941                                         + ntohs(ip_hdr(skb)->tot_len));
1942
1943                         if (real_len < skb->len)
1944                                 pskb_trim(skb, real_len);
1945
1946                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1947                         if (unlikely(skb->len == hdr_len)) {
1948                                 /* only xsum need */
1949                                 if (netif_msg_tx_queued(adapter))
1950                                         dev_warn(&pdev->dev,
1951                                                 "IPV4 tso with zero data??\n");
1952                                 goto check_sum;
1953                         } else {
1954                                 ip_hdr(skb)->check = 0;
1955                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1956                                                         ip_hdr(skb)->saddr,
1957                                                         ip_hdr(skb)->daddr,
1958                                                         0, IPPROTO_TCP, 0);
1959                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1960                         }
1961                 }
1962
1963                 if (offload_type & SKB_GSO_TCPV6) {
1964                         struct atl1c_tpd_ext_desc *etpd =
1965                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1966
1967                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1968                         *tpd = atl1c_get_tpd(adapter, type);
1969                         ipv6_hdr(skb)->payload_len = 0;
1970                         /* check payload == 0 byte ? */
1971                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1972                         if (unlikely(skb->len == hdr_len)) {
1973                                 /* only xsum need */
1974                                 if (netif_msg_tx_queued(adapter))
1975                                         dev_warn(&pdev->dev,
1976                                                 "IPV6 tso with zero data??\n");
1977                                 goto check_sum;
1978                         } else
1979                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1980                                                 &ipv6_hdr(skb)->saddr,
1981                                                 &ipv6_hdr(skb)->daddr,
1982                                                 0, IPPROTO_TCP, 0);
1983                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1984                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1985                         etpd->pkt_len = cpu_to_le32(skb->len);
1986                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1987                 }
1988
1989                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1990                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1991                                 TPD_TCPHDR_OFFSET_SHIFT;
1992                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1993                                 TPD_MSS_SHIFT;
1994                 return 0;
1995         }
1996
1997 check_sum:
1998         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1999                 u8 css, cso;
2000                 cso = skb_checksum_start_offset(skb);
2001
2002                 if (unlikely(cso & 0x1)) {
2003                         if (netif_msg_tx_err(adapter))
2004                                 dev_err(&adapter->pdev->dev,
2005                                         "payload offset should not an event number\n");
2006                         return -1;
2007                 } else {
2008                         css = cso + skb->csum_offset;
2009
2010                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2011                                         TPD_PLOADOFFSET_SHIFT;
2012                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2013                                         TPD_CCSUM_OFFSET_SHIFT;
2014                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2015                 }
2016         }
2017         return 0;
2018 }
2019
2020 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2021                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2022                         enum atl1c_trans_queue type)
2023 {
2024         struct atl1c_tpd_desc *use_tpd = NULL;
2025         struct atl1c_buffer *buffer_info = NULL;
2026         u16 buf_len = skb_headlen(skb);
2027         u16 map_len = 0;
2028         u16 mapped_len = 0;
2029         u16 hdr_len = 0;
2030         u16 nr_frags;
2031         u16 f;
2032         int tso;
2033
2034         nr_frags = skb_shinfo(skb)->nr_frags;
2035         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2036         if (tso) {
2037                 /* TSO */
2038                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2039                 use_tpd = tpd;
2040
2041                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2042                 buffer_info->length = map_len;
2043                 buffer_info->dma = pci_map_single(adapter->pdev,
2044                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2045                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2046                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2047                         ATL1C_PCIMAP_TODEVICE);
2048                 mapped_len += map_len;
2049                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2050                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2051         }
2052
2053         if (mapped_len < buf_len) {
2054                 /* mapped_len == 0, means we should use the first tpd,
2055                    which is given by caller  */
2056                 if (mapped_len == 0)
2057                         use_tpd = tpd;
2058                 else {
2059                         use_tpd = atl1c_get_tpd(adapter, type);
2060                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2061                 }
2062                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2063                 buffer_info->length = buf_len - mapped_len;
2064                 buffer_info->dma =
2065                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2066                                         buffer_info->length, PCI_DMA_TODEVICE);
2067                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2068                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2069                         ATL1C_PCIMAP_TODEVICE);
2070                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2071                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2072         }
2073
2074         for (f = 0; f < nr_frags; f++) {
2075                 struct skb_frag_struct *frag;
2076
2077                 frag = &skb_shinfo(skb)->frags[f];
2078
2079                 use_tpd = atl1c_get_tpd(adapter, type);
2080                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2081
2082                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2083                 buffer_info->length = skb_frag_size(frag);
2084                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2085                                                     frag, 0,
2086                                                     buffer_info->length,
2087                                                     DMA_TO_DEVICE);
2088                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2089                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2090                         ATL1C_PCIMAP_TODEVICE);
2091                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2092                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2093         }
2094
2095         /* The last tpd */
2096         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2097         /* The last buffer info contain the skb address,
2098            so it will be free after unmap */
2099         buffer_info->skb = skb;
2100 }
2101
2102 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2103                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2104 {
2105         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2106         u16 reg;
2107
2108         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2109         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2110 }
2111
2112 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2113                                           struct net_device *netdev)
2114 {
2115         struct atl1c_adapter *adapter = netdev_priv(netdev);
2116         unsigned long flags;
2117         u16 tpd_req = 1;
2118         struct atl1c_tpd_desc *tpd;
2119         enum atl1c_trans_queue type = atl1c_trans_normal;
2120
2121         if (test_bit(__AT_DOWN, &adapter->flags)) {
2122                 dev_kfree_skb_any(skb);
2123                 return NETDEV_TX_OK;
2124         }
2125
2126         tpd_req = atl1c_cal_tpd_req(skb);
2127         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2128                 if (netif_msg_pktdata(adapter))
2129                         dev_info(&adapter->pdev->dev, "tx locked\n");
2130                 return NETDEV_TX_LOCKED;
2131         }
2132
2133         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2134                 /* no enough descriptor, just stop queue */
2135                 netif_stop_queue(netdev);
2136                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2137                 return NETDEV_TX_BUSY;
2138         }
2139
2140         tpd = atl1c_get_tpd(adapter, type);
2141
2142         /* do TSO and check sum */
2143         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2144                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2145                 dev_kfree_skb_any(skb);
2146                 return NETDEV_TX_OK;
2147         }
2148
2149         if (unlikely(vlan_tx_tag_present(skb))) {
2150                 u16 vlan = vlan_tx_tag_get(skb);
2151                 __le16 tag;
2152
2153                 vlan = cpu_to_le16(vlan);
2154                 AT_VLAN_TO_TAG(vlan, tag);
2155                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2156                 tpd->vlan_tag = tag;
2157         }
2158
2159         if (skb_network_offset(skb) != ETH_HLEN)
2160                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2161
2162         atl1c_tx_map(adapter, skb, tpd, type);
2163         atl1c_tx_queue(adapter, skb, tpd, type);
2164
2165         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2166         return NETDEV_TX_OK;
2167 }
2168
2169 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2170 {
2171         struct net_device *netdev = adapter->netdev;
2172
2173         free_irq(adapter->pdev->irq, netdev);
2174
2175         if (adapter->have_msi)
2176                 pci_disable_msi(adapter->pdev);
2177 }
2178
2179 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2180 {
2181         struct pci_dev    *pdev   = adapter->pdev;
2182         struct net_device *netdev = adapter->netdev;
2183         int flags = 0;
2184         int err = 0;
2185
2186         adapter->have_msi = true;
2187         err = pci_enable_msi(adapter->pdev);
2188         if (err) {
2189                 if (netif_msg_ifup(adapter))
2190                         dev_err(&pdev->dev,
2191                                 "Unable to allocate MSI interrupt Error: %d\n",
2192                                 err);
2193                 adapter->have_msi = false;
2194         }
2195
2196         if (!adapter->have_msi)
2197                 flags |= IRQF_SHARED;
2198         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2199                         netdev->name, netdev);
2200         if (err) {
2201                 if (netif_msg_ifup(adapter))
2202                         dev_err(&pdev->dev,
2203                                 "Unable to allocate interrupt Error: %d\n",
2204                                 err);
2205                 if (adapter->have_msi)
2206                         pci_disable_msi(adapter->pdev);
2207                 return err;
2208         }
2209         if (netif_msg_ifup(adapter))
2210                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2211         return err;
2212 }
2213
2214
2215 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2216 {
2217         /* release tx-pending skbs and reset tx/rx ring index */
2218         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2219         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2220         atl1c_clean_rx_ring(adapter);
2221 }
2222
2223 static int atl1c_up(struct atl1c_adapter *adapter)
2224 {
2225         struct net_device *netdev = adapter->netdev;
2226         int err;
2227
2228         netif_carrier_off(netdev);
2229
2230         err = atl1c_configure(adapter);
2231         if (unlikely(err))
2232                 goto err_up;
2233
2234         err = atl1c_request_irq(adapter);
2235         if (unlikely(err))
2236                 goto err_up;
2237
2238         atl1c_check_link_status(adapter);
2239         clear_bit(__AT_DOWN, &adapter->flags);
2240         napi_enable(&adapter->napi);
2241         atl1c_irq_enable(adapter);
2242         netif_start_queue(netdev);
2243         return err;
2244
2245 err_up:
2246         atl1c_clean_rx_ring(adapter);
2247         return err;
2248 }
2249
2250 static void atl1c_down(struct atl1c_adapter *adapter)
2251 {
2252         struct net_device *netdev = adapter->netdev;
2253
2254         atl1c_del_timer(adapter);
2255         adapter->work_event = 0; /* clear all event */
2256         /* signal that we're down so the interrupt handler does not
2257          * reschedule our watchdog timer */
2258         set_bit(__AT_DOWN, &adapter->flags);
2259         netif_carrier_off(netdev);
2260         napi_disable(&adapter->napi);
2261         atl1c_irq_disable(adapter);
2262         atl1c_free_irq(adapter);
2263         /* disable ASPM if device inactive */
2264         atl1c_disable_l0s_l1(&adapter->hw);
2265         /* reset MAC to disable all RX/TX */
2266         atl1c_reset_mac(&adapter->hw);
2267         msleep(1);
2268
2269         adapter->link_speed = SPEED_0;
2270         adapter->link_duplex = -1;
2271         atl1c_reset_dma_ring(adapter);
2272 }
2273
2274 /*
2275  * atl1c_open - Called when a network interface is made active
2276  * @netdev: network interface device structure
2277  *
2278  * Returns 0 on success, negative value on failure
2279  *
2280  * The open entry point is called when a network interface is made
2281  * active by the system (IFF_UP).  At this point all resources needed
2282  * for transmit and receive operations are allocated, the interrupt
2283  * handler is registered with the OS, the watchdog timer is started,
2284  * and the stack is notified that the interface is ready.
2285  */
2286 static int atl1c_open(struct net_device *netdev)
2287 {
2288         struct atl1c_adapter *adapter = netdev_priv(netdev);
2289         int err;
2290
2291         /* disallow open during test */
2292         if (test_bit(__AT_TESTING, &adapter->flags))
2293                 return -EBUSY;
2294
2295         /* allocate rx/tx dma buffer & descriptors */
2296         err = atl1c_setup_ring_resources(adapter);
2297         if (unlikely(err))
2298                 return err;
2299
2300         err = atl1c_up(adapter);
2301         if (unlikely(err))
2302                 goto err_up;
2303
2304         return 0;
2305
2306 err_up:
2307         atl1c_free_irq(adapter);
2308         atl1c_free_ring_resources(adapter);
2309         atl1c_reset_mac(&adapter->hw);
2310         return err;
2311 }
2312
2313 /*
2314  * atl1c_close - Disables a network interface
2315  * @netdev: network interface device structure
2316  *
2317  * Returns 0, this is not allowed to fail
2318  *
2319  * The close entry point is called when an interface is de-activated
2320  * by the OS.  The hardware is still under the drivers control, but
2321  * needs to be disabled.  A global MAC reset is issued to stop the
2322  * hardware, and all transmit and receive resources are freed.
2323  */
2324 static int atl1c_close(struct net_device *netdev)
2325 {
2326         struct atl1c_adapter *adapter = netdev_priv(netdev);
2327
2328         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2329         set_bit(__AT_DOWN, &adapter->flags);
2330         cancel_work_sync(&adapter->common_task);
2331         atl1c_down(adapter);
2332         atl1c_free_ring_resources(adapter);
2333         return 0;
2334 }
2335
2336 static int atl1c_suspend(struct device *dev)
2337 {
2338         struct pci_dev *pdev = to_pci_dev(dev);
2339         struct net_device *netdev = pci_get_drvdata(pdev);
2340         struct atl1c_adapter *adapter = netdev_priv(netdev);
2341         struct atl1c_hw *hw = &adapter->hw;
2342         u32 wufc = adapter->wol;
2343
2344         atl1c_disable_l0s_l1(hw);
2345         if (netif_running(netdev)) {
2346                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2347                 atl1c_down(adapter);
2348         }
2349         netif_device_detach(netdev);
2350
2351         if (wufc)
2352                 if (atl1c_phy_to_ps_link(hw) != 0)
2353                         dev_dbg(&pdev->dev, "phy power saving failed");
2354
2355         atl1c_power_saving(hw, wufc);
2356
2357         return 0;
2358 }
2359
2360 #ifdef CONFIG_PM_SLEEP
2361 static int atl1c_resume(struct device *dev)
2362 {
2363         struct pci_dev *pdev = to_pci_dev(dev);
2364         struct net_device *netdev = pci_get_drvdata(pdev);
2365         struct atl1c_adapter *adapter = netdev_priv(netdev);
2366
2367         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2368         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2369
2370         atl1c_phy_reset(&adapter->hw);
2371         atl1c_reset_mac(&adapter->hw);
2372         atl1c_phy_init(&adapter->hw);
2373
2374 #if 0
2375         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2376         pm_data &= ~PM_CTRLSTAT_PME_EN;
2377         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2378 #endif
2379
2380         netif_device_attach(netdev);
2381         if (netif_running(netdev))
2382                 atl1c_up(adapter);
2383
2384         return 0;
2385 }
2386 #endif
2387
2388 static void atl1c_shutdown(struct pci_dev *pdev)
2389 {
2390         struct net_device *netdev = pci_get_drvdata(pdev);
2391         struct atl1c_adapter *adapter = netdev_priv(netdev);
2392
2393         atl1c_suspend(&pdev->dev);
2394         pci_wake_from_d3(pdev, adapter->wol);
2395         pci_set_power_state(pdev, PCI_D3hot);
2396 }
2397
2398 static const struct net_device_ops atl1c_netdev_ops = {
2399         .ndo_open               = atl1c_open,
2400         .ndo_stop               = atl1c_close,
2401         .ndo_validate_addr      = eth_validate_addr,
2402         .ndo_start_xmit         = atl1c_xmit_frame,
2403         .ndo_set_mac_address    = atl1c_set_mac_addr,
2404         .ndo_set_rx_mode        = atl1c_set_multi,
2405         .ndo_change_mtu         = atl1c_change_mtu,
2406         .ndo_fix_features       = atl1c_fix_features,
2407         .ndo_set_features       = atl1c_set_features,
2408         .ndo_do_ioctl           = atl1c_ioctl,
2409         .ndo_tx_timeout         = atl1c_tx_timeout,
2410         .ndo_get_stats          = atl1c_get_stats,
2411 #ifdef CONFIG_NET_POLL_CONTROLLER
2412         .ndo_poll_controller    = atl1c_netpoll,
2413 #endif
2414 };
2415
2416 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2417 {
2418         SET_NETDEV_DEV(netdev, &pdev->dev);
2419         pci_set_drvdata(pdev, netdev);
2420
2421         netdev->netdev_ops = &atl1c_netdev_ops;
2422         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2423         atl1c_set_ethtool_ops(netdev);
2424
2425         /* TODO: add when ready */
2426         netdev->hw_features =   NETIF_F_SG         |
2427                                 NETIF_F_HW_CSUM    |
2428                                 NETIF_F_HW_VLAN_RX |
2429                                 NETIF_F_TSO        |
2430                                 NETIF_F_TSO6;
2431         netdev->features =      netdev->hw_features |
2432                                 NETIF_F_HW_VLAN_TX;
2433         return 0;
2434 }
2435
2436 /*
2437  * atl1c_probe - Device Initialization Routine
2438  * @pdev: PCI device information struct
2439  * @ent: entry in atl1c_pci_tbl
2440  *
2441  * Returns 0 on success, negative on failure
2442  *
2443  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2444  * The OS initialization, configuring of the adapter private structure,
2445  * and a hardware reset occur.
2446  */
2447 static int __devinit atl1c_probe(struct pci_dev *pdev,
2448                                  const struct pci_device_id *ent)
2449 {
2450         struct net_device *netdev;
2451         struct atl1c_adapter *adapter;
2452         static int cards_found;
2453
2454         int err = 0;
2455
2456         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2457         err = pci_enable_device_mem(pdev);
2458         if (err) {
2459                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2460                 return err;
2461         }
2462
2463         /*
2464          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2465          * shared register for the high 32 bits, so only a single, aligned,
2466          * 4 GB physical address range can be used at a time.
2467          *
2468          * Supporting 64-bit DMA on this hardware is more trouble than it's
2469          * worth.  It is far easier to limit to 32-bit DMA than update
2470          * various kernel subsystems to support the mechanics required by a
2471          * fixed-high-32-bit system.
2472          */
2473         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2474             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2475                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2476                 goto err_dma;
2477         }
2478
2479         err = pci_request_regions(pdev, atl1c_driver_name);
2480         if (err) {
2481                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2482                 goto err_pci_reg;
2483         }
2484
2485         pci_set_master(pdev);
2486
2487         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2488         if (netdev == NULL) {
2489                 err = -ENOMEM;
2490                 goto err_alloc_etherdev;
2491         }
2492
2493         err = atl1c_init_netdev(netdev, pdev);
2494         if (err) {
2495                 dev_err(&pdev->dev, "init netdevice failed\n");
2496                 goto err_init_netdev;
2497         }
2498         adapter = netdev_priv(netdev);
2499         adapter->bd_number = cards_found;
2500         adapter->netdev = netdev;
2501         adapter->pdev = pdev;
2502         adapter->hw.adapter = adapter;
2503         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2504         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2505         if (!adapter->hw.hw_addr) {
2506                 err = -EIO;
2507                 dev_err(&pdev->dev, "cannot map device registers\n");
2508                 goto err_ioremap;
2509         }
2510
2511         /* init mii data */
2512         adapter->mii.dev = netdev;
2513         adapter->mii.mdio_read  = atl1c_mdio_read;
2514         adapter->mii.mdio_write = atl1c_mdio_write;
2515         adapter->mii.phy_id_mask = 0x1f;
2516         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2517         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2518         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2519                         (unsigned long)adapter);
2520         /* setup the private structure */
2521         err = atl1c_sw_init(adapter);
2522         if (err) {
2523                 dev_err(&pdev->dev, "net device private data init failed\n");
2524                 goto err_sw_init;
2525         }
2526         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2527
2528         /* Init GPHY as early as possible due to power saving issue  */
2529         atl1c_phy_reset(&adapter->hw);
2530
2531         err = atl1c_reset_mac(&adapter->hw);
2532         if (err) {
2533                 err = -EIO;
2534                 goto err_reset;
2535         }
2536
2537         /* reset the controller to
2538          * put the device in a known good starting state */
2539         err = atl1c_phy_init(&adapter->hw);
2540         if (err) {
2541                 err = -EIO;
2542                 goto err_reset;
2543         }
2544         if (atl1c_read_mac_addr(&adapter->hw)) {
2545                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2546                 netdev->addr_assign_type |= NET_ADDR_RANDOM;
2547         }
2548         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2549         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2550         if (netif_msg_probe(adapter))
2551                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2552                         adapter->hw.mac_addr);
2553
2554         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2555         INIT_WORK(&adapter->common_task, atl1c_common_task);
2556         adapter->work_event = 0;
2557         err = register_netdev(netdev);
2558         if (err) {
2559                 dev_err(&pdev->dev, "register netdevice failed\n");
2560                 goto err_register;
2561         }
2562
2563         if (netif_msg_probe(adapter))
2564                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2565         cards_found++;
2566         return 0;
2567
2568 err_reset:
2569 err_register:
2570 err_sw_init:
2571         iounmap(adapter->hw.hw_addr);
2572 err_init_netdev:
2573 err_ioremap:
2574         free_netdev(netdev);
2575 err_alloc_etherdev:
2576         pci_release_regions(pdev);
2577 err_pci_reg:
2578 err_dma:
2579         pci_disable_device(pdev);
2580         return err;
2581 }
2582
2583 /*
2584  * atl1c_remove - Device Removal Routine
2585  * @pdev: PCI device information struct
2586  *
2587  * atl1c_remove is called by the PCI subsystem to alert the driver
2588  * that it should release a PCI device.  The could be caused by a
2589  * Hot-Plug event, or because the driver is going to be removed from
2590  * memory.
2591  */
2592 static void __devexit atl1c_remove(struct pci_dev *pdev)
2593 {
2594         struct net_device *netdev = pci_get_drvdata(pdev);
2595         struct atl1c_adapter *adapter = netdev_priv(netdev);
2596
2597         unregister_netdev(netdev);
2598         /* restore permanent address */
2599         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2600         atl1c_phy_disable(&adapter->hw);
2601
2602         iounmap(adapter->hw.hw_addr);
2603
2604         pci_release_regions(pdev);
2605         pci_disable_device(pdev);
2606         free_netdev(netdev);
2607 }
2608
2609 /*
2610  * atl1c_io_error_detected - called when PCI error is detected
2611  * @pdev: Pointer to PCI device
2612  * @state: The current pci connection state
2613  *
2614  * This function is called after a PCI bus error affecting
2615  * this device has been detected.
2616  */
2617 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2618                                                 pci_channel_state_t state)
2619 {
2620         struct net_device *netdev = pci_get_drvdata(pdev);
2621         struct atl1c_adapter *adapter = netdev_priv(netdev);
2622
2623         netif_device_detach(netdev);
2624
2625         if (state == pci_channel_io_perm_failure)
2626                 return PCI_ERS_RESULT_DISCONNECT;
2627
2628         if (netif_running(netdev))
2629                 atl1c_down(adapter);
2630
2631         pci_disable_device(pdev);
2632
2633         /* Request a slot slot reset. */
2634         return PCI_ERS_RESULT_NEED_RESET;
2635 }
2636
2637 /*
2638  * atl1c_io_slot_reset - called after the pci bus has been reset.
2639  * @pdev: Pointer to PCI device
2640  *
2641  * Restart the card from scratch, as if from a cold-boot. Implementation
2642  * resembles the first-half of the e1000_resume routine.
2643  */
2644 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2645 {
2646         struct net_device *netdev = pci_get_drvdata(pdev);
2647         struct atl1c_adapter *adapter = netdev_priv(netdev);
2648
2649         if (pci_enable_device(pdev)) {
2650                 if (netif_msg_hw(adapter))
2651                         dev_err(&pdev->dev,
2652                                 "Cannot re-enable PCI device after reset\n");
2653                 return PCI_ERS_RESULT_DISCONNECT;
2654         }
2655         pci_set_master(pdev);
2656
2657         pci_enable_wake(pdev, PCI_D3hot, 0);
2658         pci_enable_wake(pdev, PCI_D3cold, 0);
2659
2660         atl1c_reset_mac(&adapter->hw);
2661
2662         return PCI_ERS_RESULT_RECOVERED;
2663 }
2664
2665 /*
2666  * atl1c_io_resume - called when traffic can start flowing again.
2667  * @pdev: Pointer to PCI device
2668  *
2669  * This callback is called when the error recovery driver tells us that
2670  * its OK to resume normal operation. Implementation resembles the
2671  * second-half of the atl1c_resume routine.
2672  */
2673 static void atl1c_io_resume(struct pci_dev *pdev)
2674 {
2675         struct net_device *netdev = pci_get_drvdata(pdev);
2676         struct atl1c_adapter *adapter = netdev_priv(netdev);
2677
2678         if (netif_running(netdev)) {
2679                 if (atl1c_up(adapter)) {
2680                         if (netif_msg_hw(adapter))
2681                                 dev_err(&pdev->dev,
2682                                         "Cannot bring device back up after reset\n");
2683                         return;
2684                 }
2685         }
2686
2687         netif_device_attach(netdev);
2688 }
2689
2690 static struct pci_error_handlers atl1c_err_handler = {
2691         .error_detected = atl1c_io_error_detected,
2692         .slot_reset = atl1c_io_slot_reset,
2693         .resume = atl1c_io_resume,
2694 };
2695
2696 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2697
2698 static struct pci_driver atl1c_driver = {
2699         .name     = atl1c_driver_name,
2700         .id_table = atl1c_pci_tbl,
2701         .probe    = atl1c_probe,
2702         .remove   = __devexit_p(atl1c_remove),
2703         .shutdown = atl1c_shutdown,
2704         .err_handler = &atl1c_err_handler,
2705         .driver.pm = &atl1c_pm_ops,
2706 };
2707
2708 /*
2709  * atl1c_init_module - Driver Registration Routine
2710  *
2711  * atl1c_init_module is the first routine called when the driver is
2712  * loaded. All it does is register with the PCI subsystem.
2713  */
2714 static int __init atl1c_init_module(void)
2715 {
2716         return pci_register_driver(&atl1c_driver);
2717 }
2718
2719 /*
2720  * atl1c_exit_module - Driver Exit Cleanup Routine
2721  *
2722  * atl1c_exit_module is called just before the driver is removed
2723  * from memory.
2724  */
2725 static void __exit atl1c_exit_module(void)
2726 {
2727         pci_unregister_driver(&atl1c_driver);
2728 }
2729
2730 module_init(atl1c_init_module);
2731 module_exit(atl1c_exit_module);