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 #define PCI_DEVICE_ID_ATTANSIC_L2C      0x1062
  28 #define PCI_DEVICE_ID_ATTANSIC_L1C      0x1063
  29 #define PCI_DEVICE_ID_ATHEROS_L2C_B     0x2060 /* AR8152 v1.1 Fast 10/100 */
  30 #define PCI_DEVICE_ID_ATHEROS_L2C_B2    0x2062 /* AR8152 v2.0 Fast 10/100 */
  31 #define PCI_DEVICE_ID_ATHEROS_L1D       0x1073 /* AR8151 v1.0 Gigabit 1000 */
  32 #define PCI_DEVICE_ID_ATHEROS_L1D_2_0   0x1083 /* AR8151 v2.0 Gigabit 1000 */
  33 #define L2CB_V10                        0xc0
  34 #define L2CB_V11                        0xc1
  35
  36 /*
  37  * atl1c_pci_tbl - PCI Device ID Table
  38  *
  39  * Wildcard entries (PCI_ANY_ID) should come last
  40  * Last entry must be all 0s
  41  *
  42  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  43  *   Class, Class Mask, private data (not used) }
  44  */
  45 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = {
  46         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  47         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  48         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  49         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  50         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  51         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  52         /* required last entry */
  53         { 0 }
  54 };
  55 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  56
  57 MODULE_AUTHOR("Jie Yang");
  58 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
  59 MODULE_DESCRIPTION("Qualcom Atheros 100/1000M Ethernet Network Driver");
  60 MODULE_LICENSE("GPL");
  61 MODULE_VERSION(ATL1C_DRV_VERSION);
  62
  63 static int atl1c_stop_mac(struct atl1c_hw *hw);
  64 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
  65 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
  66 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  67 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
  68 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
  69 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
  70                    int *work_done, int work_to_do);
  71 static int atl1c_up(struct atl1c_adapter *adapter);
  72 static void atl1c_down(struct atl1c_adapter *adapter);
  73
  74 static const u16 atl1c_pay_load_size[] = {
  75         128, 256, 512, 1024, 2048, 4096,
  76 };
  77
  78
  79 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  80         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  81 static void atl1c_pcie_patch(struct atl1c_hw *hw)
  82 {
  83         u32 mst_data, data;
  84
  85         /* pclk sel could switch to 25M */
  86         AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
  87         mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
  88         AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
  89
  90         /* WoL/PCIE related settings */
  91         if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
  92                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
  93                 data |= PCIE_PHYMISC_FORCE_RCV_DET;
  94                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
  95         } else { /* new dev set bit5 of MASTER */
  96                 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
  97                         AT_WRITE_REG(hw, REG_MASTER_CTRL,
  98                                 mst_data | MASTER_CTRL_WAKEN_25M);
  99         }
 100         /* aspm/PCIE setting only for l2cb 1.0 */
 101         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
 102                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
 103                 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
 104                         L2CB1_PCIE_PHYMISC2_CDR_BW);
 105                 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
 106                         L2CB1_PCIE_PHYMISC2_L0S_TH);
 107                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
 108                 /* extend L1 sync timer */
 109                 AT_READ_REG(hw, REG_LINK_CTRL, &data);
 110                 data |= LINK_CTRL_EXT_SYNC;
 111                 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
 112         }
 113         /* l2cb 1.x & l1d 1.x */
 114         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
 115                 AT_READ_REG(hw, REG_PM_CTRL, &data);
 116                 data |= PM_CTRL_L0S_BUFSRX_EN;
 117                 AT_WRITE_REG(hw, REG_PM_CTRL, data);
 118                 /* clear vendor msg */
 119                 AT_READ_REG(hw, REG_DMA_DBG, &data);
 120                 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
 121         }
 122 }
 123
 124 /* FIXME: no need any more ? */
 125 /*
 126  * atl1c_init_pcie - init PCIE module
 127  */
 128 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 129 {
 130         u32 data;
 131         u32 pci_cmd;
 132         struct pci_dev *pdev = hw->adapter->pdev;
 133         int pos;
 134
 135         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 136         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 137         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 138                 PCI_COMMAND_IO);
 139         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 140
 141         /*
 142          * Clear any PowerSaveing Settings
 143          */
 144         pci_enable_wake(pdev, PCI_D3hot, 0);
 145         pci_enable_wake(pdev, PCI_D3cold, 0);
 146
 147         /*
 148          * Mask some pcie error bits
 149          */
 150         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 151         pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
 152         data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
 153         pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
 154         /* clear error status */
 155         pci_write_config_word(pdev, pci_pcie_cap(pdev) + PCI_EXP_DEVSTA,
 156                         PCI_EXP_DEVSTA_NFED |
 157                         PCI_EXP_DEVSTA_FED |
 158                         PCI_EXP_DEVSTA_CED |
 159                         PCI_EXP_DEVSTA_URD);
 160
 161         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 162         data &= ~LTSSM_ID_EN_WRO;
 163         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 164
 165         atl1c_pcie_patch(hw);
 166         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 167                 atl1c_disable_l0s_l1(hw);
 168         if (flag & ATL1C_PCIE_PHY_RESET)
 169                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 170         else
 171                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 172                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 173
 174         msleep(5);
 175 }
 176
 177 /*
 178  * atl1c_irq_enable - Enable default interrupt generation settings
 179  * @adapter: board private structure
 180  */
 181 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 182 {
 183         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 184                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 185                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 186                 AT_WRITE_FLUSH(&adapter->hw);
 187         }
 188 }
 189
 190 /*
 191  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 192  * @adapter: board private structure
 193  */
 194 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 195 {
 196         atomic_inc(&adapter->irq_sem);
 197         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 198         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 199         AT_WRITE_FLUSH(&adapter->hw);
 200         synchronize_irq(adapter->pdev->irq);
 201 }
 202
 203 /*
 204  * atl1c_irq_reset - reset interrupt confiure on the NIC
 205  * @adapter: board private structure
 206  */
 207 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 208 {
 209         atomic_set(&adapter->irq_sem, 1);
 210         atl1c_irq_enable(adapter);
 211 }
 212
 213 /*
 214  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 215  * of the idle status register until the device is actually idle
 216  */
 217 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
 218 {
 219         int timeout;
 220         u32 data;
 221
 222         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 223                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 224                 if ((data & modu_ctrl) == 0)
 225                         return 0;
 226                 msleep(1);
 227         }
 228         return data;
 229 }
 230
 231 /*
 232  * atl1c_phy_config - Timer Call-back
 233  * @data: pointer to netdev cast into an unsigned long
 234  */
 235 static void atl1c_phy_config(unsigned long data)
 236 {
 237         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 238         struct atl1c_hw *hw = &adapter->hw;
 239         unsigned long flags;
 240
 241         spin_lock_irqsave(&adapter->mdio_lock, flags);
 242         atl1c_restart_autoneg(hw);
 243         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 244 }
 245
 246 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 247 {
 248         WARN_ON(in_interrupt());
 249         atl1c_down(adapter);
 250         atl1c_up(adapter);
 251         clear_bit(__AT_RESETTING, &adapter->flags);
 252 }
 253
 254 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 255 {
 256         struct atl1c_hw *hw = &adapter->hw;
 257         struct net_device *netdev = adapter->netdev;
 258         struct pci_dev    *pdev   = adapter->pdev;
 259         int err;
 260         unsigned long flags;
 261         u16 speed, duplex, phy_data;
 262
 263         spin_lock_irqsave(&adapter->mdio_lock, flags);
 264         /* MII_BMSR must read twise */
 265         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 266         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 267         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 268
 269         if ((phy_data & BMSR_LSTATUS) == 0) {
 270                 /* link down */
 271                 hw->hibernate = true;
 272                 if (atl1c_stop_mac(hw) != 0)
 273                         if (netif_msg_hw(adapter))
 274                                 dev_warn(&pdev->dev, "stop mac failed\n");
 275                 atl1c_set_aspm(hw, SPEED_0);
 276                 netif_carrier_off(netdev);
 277                 netif_stop_queue(netdev);
 278                 atl1c_phy_reset(hw);
 279                 atl1c_phy_init(&adapter->hw);
 280         } else {
 281                 /* Link Up */
 282                 hw->hibernate = false;
 283                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 284                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 285                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 286                 if (unlikely(err))
 287                         return;
 288                 /* link result is our setting */
 289                 if (adapter->link_speed != speed ||
 290                     adapter->link_duplex != duplex) {
 291                         adapter->link_speed  = speed;
 292                         adapter->link_duplex = duplex;
 293                         atl1c_set_aspm(hw, speed);
 294                         atl1c_enable_tx_ctrl(hw);
 295                         atl1c_enable_rx_ctrl(hw);
 296                         atl1c_setup_mac_ctrl(adapter);
 297                         if (netif_msg_link(adapter))
 298                                 dev_info(&pdev->dev,
 299                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 300                                         atl1c_driver_name, netdev->name,
 301                                         adapter->link_speed,
 302                                         adapter->link_duplex == FULL_DUPLEX ?
 303                                         "Full Duplex" : "Half Duplex");
 304                 }
 305                 if (!netif_carrier_ok(netdev))
 306                         netif_carrier_on(netdev);
 307         }
 308 }
 309
 310 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 311 {
 312         struct net_device *netdev = adapter->netdev;
 313         struct pci_dev    *pdev   = adapter->pdev;
 314         u16 phy_data;
 315         u16 link_up;
 316
 317         spin_lock(&adapter->mdio_lock);
 318         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 319         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 320         spin_unlock(&adapter->mdio_lock);
 321         link_up = phy_data & BMSR_LSTATUS;
 322         /* notify upper layer link down ASAP */
 323         if (!link_up) {
 324                 if (netif_carrier_ok(netdev)) {
 325                         /* old link state: Up */
 326                         netif_carrier_off(netdev);
 327                         if (netif_msg_link(adapter))
 328                                 dev_info(&pdev->dev,
 329                                         "%s: %s NIC Link is Down\n",
 330                                         atl1c_driver_name, netdev->name);
 331                         adapter->link_speed = SPEED_0;
 332                 }
 333         }
 334
 335         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 336         schedule_work(&adapter->common_task);
 337 }
 338
 339 static void atl1c_common_task(struct work_struct *work)
 340 {
 341         struct atl1c_adapter *adapter;
 342         struct net_device *netdev;
 343
 344         adapter = container_of(work, struct atl1c_adapter, common_task);
 345         netdev = adapter->netdev;
 346
 347         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 348                 netif_device_detach(netdev);
 349                 atl1c_down(adapter);
 350                 atl1c_up(adapter);
 351                 netif_device_attach(netdev);
 352         }
 353
 354         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 355                 &adapter->work_event))
 356                 atl1c_check_link_status(adapter);
 357 }
 358
 359
 360 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 361 {
 362         del_timer_sync(&adapter->phy_config_timer);
 363 }
 364
 365
 366 /*
 367  * atl1c_tx_timeout - Respond to a Tx Hang
 368  * @netdev: network interface device structure
 369  */
 370 static void atl1c_tx_timeout(struct net_device *netdev)
 371 {
 372         struct atl1c_adapter *adapter = netdev_priv(netdev);
 373
 374         /* Do the reset outside of interrupt context */
 375         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 376         schedule_work(&adapter->common_task);
 377 }
 378
 379 /*
 380  * atl1c_set_multi - Multicast and Promiscuous mode set
 381  * @netdev: network interface device structure
 382  *
 383  * The set_multi entry point is called whenever the multicast address
 384  * list or the network interface flags are updated.  This routine is
 385  * responsible for configuring the hardware for proper multicast,
 386  * promiscuous mode, and all-multi behavior.
 387  */
 388 static void atl1c_set_multi(struct net_device *netdev)
 389 {
 390         struct atl1c_adapter *adapter = netdev_priv(netdev);
 391         struct atl1c_hw *hw = &adapter->hw;
 392         struct netdev_hw_addr *ha;
 393         u32 mac_ctrl_data;
 394         u32 hash_value;
 395
 396         /* Check for Promiscuous and All Multicast modes */
 397         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 398
 399         if (netdev->flags & IFF_PROMISC) {
 400                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 401         } else if (netdev->flags & IFF_ALLMULTI) {
 402                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 403                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 404         } else {
 405                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 406         }
 407
 408         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 409
 410         /* clear the old settings from the multicast hash table */
 411         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 412         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 413
 414         /* comoute mc addresses' hash value ,and put it into hash table */
 415         netdev_for_each_mc_addr(ha, netdev) {
 416                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 417                 atl1c_hash_set(hw, hash_value);
 418         }
 419 }
 420
 421 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 422 {
 423         if (features & NETIF_F_HW_VLAN_RX) {
 424                 /* enable VLAN tag insert/strip */
 425                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 426         } else {
 427                 /* disable VLAN tag insert/strip */
 428                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 429         }
 430 }
 431
 432 static void atl1c_vlan_mode(struct net_device *netdev,
 433         netdev_features_t features)
 434 {
 435         struct atl1c_adapter *adapter = netdev_priv(netdev);
 436         struct pci_dev *pdev = adapter->pdev;
 437         u32 mac_ctrl_data = 0;
 438
 439         if (netif_msg_pktdata(adapter))
 440                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 441
 442         atl1c_irq_disable(adapter);
 443         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 444         __atl1c_vlan_mode(features, &mac_ctrl_data);
 445         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 446         atl1c_irq_enable(adapter);
 447 }
 448
 449 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 450 {
 451         struct pci_dev *pdev = adapter->pdev;
 452
 453         if (netif_msg_pktdata(adapter))
 454                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 455         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 456 }
 457
 458 /*
 459  * atl1c_set_mac - Change the Ethernet Address of the NIC
 460  * @netdev: network interface device structure
 461  * @p: pointer to an address structure
 462  *
 463  * Returns 0 on success, negative on failure
 464  */
 465 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 466 {
 467         struct atl1c_adapter *adapter = netdev_priv(netdev);
 468         struct sockaddr *addr = p;
 469
 470         if (!is_valid_ether_addr(addr->sa_data))
 471                 return -EADDRNOTAVAIL;
 472
 473         if (netif_running(netdev))
 474                 return -EBUSY;
 475
 476         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 477         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 478         netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
 479
 480         atl1c_hw_set_mac_addr(&adapter->hw);
 481
 482         return 0;
 483 }
 484
 485 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 486                                 struct net_device *dev)
 487 {
 488         int mtu = dev->mtu;
 489
 490         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 491                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 492 }
 493
 494 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 495         netdev_features_t features)
 496 {
 497         /*
 498          * Since there is no support for separate rx/tx vlan accel
 499          * enable/disable make sure tx flag is always in same state as rx.
 500          */
 501         if (features & NETIF_F_HW_VLAN_RX)
 502                 features |= NETIF_F_HW_VLAN_TX;
 503         else
 504                 features &= ~NETIF_F_HW_VLAN_TX;
 505
 506         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 507                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 508
 509         return features;
 510 }
 511
 512 static int atl1c_set_features(struct net_device *netdev,
 513         netdev_features_t features)
 514 {
 515         netdev_features_t changed = netdev->features ^ features;
 516
 517         if (changed & NETIF_F_HW_VLAN_RX)
 518                 atl1c_vlan_mode(netdev, features);
 519
 520         return 0;
 521 }
 522
 523 /*
 524  * atl1c_change_mtu - Change the Maximum Transfer Unit
 525  * @netdev: network interface device structure
 526  * @new_mtu: new value for maximum frame size
 527  *
 528  * Returns 0 on success, negative on failure
 529  */
 530 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 531 {
 532         struct atl1c_adapter *adapter = netdev_priv(netdev);
 533         struct atl1c_hw *hw = &adapter->hw;
 534         int old_mtu   = netdev->mtu;
 535         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 536
 537         /* Fast Ethernet controller doesn't support jumbo packet */
 538         if (((hw->nic_type == athr_l2c ||
 539               hw->nic_type == athr_l2c_b ||
 540               hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
 541               max_frame < ETH_ZLEN + ETH_FCS_LEN ||
 542               max_frame > MAX_JUMBO_FRAME_SIZE) {
 543                 if (netif_msg_link(adapter))
 544                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 545                 return -EINVAL;
 546         }
 547         /* set MTU */
 548         if (old_mtu != new_mtu && netif_running(netdev)) {
 549                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 550                         msleep(1);
 551                 netdev->mtu = new_mtu;
 552                 adapter->hw.max_frame_size = new_mtu;
 553                 atl1c_set_rxbufsize(adapter, netdev);
 554                 atl1c_down(adapter);
 555                 netdev_update_features(netdev);
 556                 atl1c_up(adapter);
 557                 clear_bit(__AT_RESETTING, &adapter->flags);
 558                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 559                         u32 phy_data;
 560
 561                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 562                         phy_data |= 0x10000000;
 563                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 564                 }
 565
 566         }
 567         return 0;
 568 }
 569
 570 /*
 571  *  caller should hold mdio_lock
 572  */
 573 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 574 {
 575         struct atl1c_adapter *adapter = netdev_priv(netdev);
 576         u16 result;
 577
 578         atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
 579         return result;
 580 }
 581
 582 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 583                              int reg_num, int val)
 584 {
 585         struct atl1c_adapter *adapter = netdev_priv(netdev);
 586
 587         atl1c_write_phy_reg(&adapter->hw, reg_num, val);
 588 }
 589
 590 /*
 591  * atl1c_mii_ioctl -
 592  * @netdev:
 593  * @ifreq:
 594  * @cmd:
 595  */
 596 static int atl1c_mii_ioctl(struct net_device *netdev,
 597                            struct ifreq *ifr, int cmd)
 598 {
 599         struct atl1c_adapter *adapter = netdev_priv(netdev);
 600         struct pci_dev *pdev = adapter->pdev;
 601         struct mii_ioctl_data *data = if_mii(ifr);
 602         unsigned long flags;
 603         int retval = 0;
 604
 605         if (!netif_running(netdev))
 606                 return -EINVAL;
 607
 608         spin_lock_irqsave(&adapter->mdio_lock, flags);
 609         switch (cmd) {
 610         case SIOCGMIIPHY:
 611                 data->phy_id = 0;
 612                 break;
 613
 614         case SIOCGMIIREG:
 615                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 616                                     &data->val_out)) {
 617                         retval = -EIO;
 618                         goto out;
 619                 }
 620                 break;
 621
 622         case SIOCSMIIREG:
 623                 if (data->reg_num & ~(0x1F)) {
 624                         retval = -EFAULT;
 625                         goto out;
 626                 }
 627
 628                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 629                                 data->reg_num, data->val_in);
 630                 if (atl1c_write_phy_reg(&adapter->hw,
 631                                      data->reg_num, data->val_in)) {
 632                         retval = -EIO;
 633                         goto out;
 634                 }
 635                 break;
 636
 637         default:
 638                 retval = -EOPNOTSUPP;
 639                 break;
 640         }
 641 out:
 642         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 643         return retval;
 644 }
 645
 646 /*
 647  * atl1c_ioctl -
 648  * @netdev:
 649  * @ifreq:
 650  * @cmd:
 651  */
 652 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 653 {
 654         switch (cmd) {
 655         case SIOCGMIIPHY:
 656         case SIOCGMIIREG:
 657         case SIOCSMIIREG:
 658                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 659         default:
 660                 return -EOPNOTSUPP;
 661         }
 662 }
 663
 664 /*
 665  * atl1c_alloc_queues - Allocate memory for all rings
 666  * @adapter: board private structure to initialize
 667  *
 668  */
 669 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 670 {
 671         return 0;
 672 }
 673
 674 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 675 {
 676         switch (hw->device_id) {
 677         case PCI_DEVICE_ID_ATTANSIC_L2C:
 678                 hw->nic_type = athr_l2c;
 679                 break;
 680         case PCI_DEVICE_ID_ATTANSIC_L1C:
 681                 hw->nic_type = athr_l1c;
 682                 break;
 683         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 684                 hw->nic_type = athr_l2c_b;
 685                 break;
 686         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 687                 hw->nic_type = athr_l2c_b2;
 688                 break;
 689         case PCI_DEVICE_ID_ATHEROS_L1D:
 690                 hw->nic_type = athr_l1d;
 691                 break;
 692         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 693                 hw->nic_type = athr_l1d_2;
 694                 break;
 695         default:
 696                 break;
 697         }
 698 }
 699
 700 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 701 {
 702         u32 link_ctrl_data;
 703
 704         atl1c_set_mac_type(hw);
 705         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 706
 707         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 708                          ATL1C_TXQ_MODE_ENHANCE;
 709         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 710                           ATL1C_ASPM_L1_SUPPORT;
 711         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 712
 713         if (hw->nic_type == athr_l1c ||
 714             hw->nic_type == athr_l1d ||
 715             hw->nic_type == athr_l1d_2)
 716                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 717         return 0;
 718 }
 719 /*
 720  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 721  * @adapter: board private structure to initialize
 722  *
 723  * atl1c_sw_init initializes the Adapter private data structure.
 724  * Fields are initialized based on PCI device information and
 725  * OS network device settings (MTU size).
 726  */
 727 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 728 {
 729         struct atl1c_hw *hw   = &adapter->hw;
 730         struct pci_dev  *pdev = adapter->pdev;
 731         u32 revision;
 732
 733
 734         adapter->wol = 0;
 735         device_set_wakeup_enable(&pdev->dev, false);
 736         adapter->link_speed = SPEED_0;
 737         adapter->link_duplex = FULL_DUPLEX;
 738         adapter->tpd_ring[0].count = 1024;
 739         adapter->rfd_ring.count = 512;
 740
 741         hw->vendor_id = pdev->vendor;
 742         hw->device_id = pdev->device;
 743         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 744         hw->subsystem_id = pdev->subsystem_device;
 745         AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
 746         hw->revision_id = revision & 0xFF;
 747         /* before link up, we assume hibernate is true */
 748         hw->hibernate = true;
 749         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 750         if (atl1c_setup_mac_funcs(hw) != 0) {
 751                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 752                 return -1;
 753         }
 754         hw->intr_mask = IMR_NORMAL_MASK;
 755         hw->phy_configured = false;
 756         hw->preamble_len = 7;
 757         hw->max_frame_size = adapter->netdev->mtu;
 758         hw->autoneg_advertised = ADVERTISED_Autoneg;
 759         hw->indirect_tab = 0xE4E4E4E4;
 760         hw->base_cpu = 0;
 761
 762         hw->ict = 50000;                /* 100ms */
 763         hw->smb_timer = 200000;         /* 400ms */
 764         hw->rx_imt = 200;
 765         hw->tx_imt = 1000;
 766
 767         hw->tpd_burst = 5;
 768         hw->rfd_burst = 8;
 769         hw->dma_order = atl1c_dma_ord_out;
 770         hw->dmar_block = atl1c_dma_req_1024;
 771
 772         if (atl1c_alloc_queues(adapter)) {
 773                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 774                 return -ENOMEM;
 775         }
 776         /* TODO */
 777         atl1c_set_rxbufsize(adapter, adapter->netdev);
 778         atomic_set(&adapter->irq_sem, 1);
 779         spin_lock_init(&adapter->mdio_lock);
 780         spin_lock_init(&adapter->tx_lock);
 781         set_bit(__AT_DOWN, &adapter->flags);
 782
 783         return 0;
 784 }
 785
 786 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 787                                 struct atl1c_buffer *buffer_info, int in_irq)
 788 {
 789         u16 pci_driection;
 790         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 791                 return;
 792         if (buffer_info->dma) {
 793                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 794                         pci_driection = PCI_DMA_FROMDEVICE;
 795                 else
 796                         pci_driection = PCI_DMA_TODEVICE;
 797
 798                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 799                         pci_unmap_single(pdev, buffer_info->dma,
 800                                         buffer_info->length, pci_driection);
 801                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 802                         pci_unmap_page(pdev, buffer_info->dma,
 803                                         buffer_info->length, pci_driection);
 804         }
 805         if (buffer_info->skb) {
 806                 if (in_irq)
 807                         dev_kfree_skb_irq(buffer_info->skb);
 808                 else
 809                         dev_kfree_skb(buffer_info->skb);
 810         }
 811         buffer_info->dma = 0;
 812         buffer_info->skb = NULL;
 813         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 814 }
 815 /*
 816  * atl1c_clean_tx_ring - Free Tx-skb
 817  * @adapter: board private structure
 818  */
 819 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 820                                 enum atl1c_trans_queue type)
 821 {
 822         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 823         struct atl1c_buffer *buffer_info;
 824         struct pci_dev *pdev = adapter->pdev;
 825         u16 index, ring_count;
 826
 827         ring_count = tpd_ring->count;
 828         for (index = 0; index < ring_count; index++) {
 829                 buffer_info = &tpd_ring->buffer_info[index];
 830                 atl1c_clean_buffer(pdev, buffer_info, 0);
 831         }
 832
 833         /* Zero out Tx-buffers */
 834         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 835                 ring_count);
 836         atomic_set(&tpd_ring->next_to_clean, 0);
 837         tpd_ring->next_to_use = 0;
 838 }
 839
 840 /*
 841  * atl1c_clean_rx_ring - Free rx-reservation skbs
 842  * @adapter: board private structure
 843  */
 844 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 845 {
 846         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 847         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 848         struct atl1c_buffer *buffer_info;
 849         struct pci_dev *pdev = adapter->pdev;
 850         int j;
 851
 852         for (j = 0; j < rfd_ring->count; j++) {
 853                 buffer_info = &rfd_ring->buffer_info[j];
 854                 atl1c_clean_buffer(pdev, buffer_info, 0);
 855         }
 856         /* zero out the descriptor ring */
 857         memset(rfd_ring->desc, 0, rfd_ring->size);
 858         rfd_ring->next_to_clean = 0;
 859         rfd_ring->next_to_use = 0;
 860         rrd_ring->next_to_use = 0;
 861         rrd_ring->next_to_clean = 0;
 862 }
 863
 864 /*
 865  * Read / Write Ptr Initialize:
 866  */
 867 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 868 {
 869         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 870         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 871         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 872         struct atl1c_buffer *buffer_info;
 873         int i, j;
 874
 875         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 876                 tpd_ring[i].next_to_use = 0;
 877                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 878                 buffer_info = tpd_ring[i].buffer_info;
 879                 for (j = 0; j < tpd_ring->count; j++)
 880                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 881                                         ATL1C_BUFFER_FREE);
 882         }
 883         rfd_ring->next_to_use = 0;
 884         rfd_ring->next_to_clean = 0;
 885         rrd_ring->next_to_use = 0;
 886         rrd_ring->next_to_clean = 0;
 887         for (j = 0; j < rfd_ring->count; j++) {
 888                 buffer_info = &rfd_ring->buffer_info[j];
 889                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 890         }
 891 }
 892
 893 /*
 894  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 895  * @adapter: board private structure
 896  *
 897  * Free all transmit software resources
 898  */
 899 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 900 {
 901         struct pci_dev *pdev = adapter->pdev;
 902
 903         pci_free_consistent(pdev, adapter->ring_header.size,
 904                                         adapter->ring_header.desc,
 905                                         adapter->ring_header.dma);
 906         adapter->ring_header.desc = NULL;
 907
 908         /* Note: just free tdp_ring.buffer_info,
 909         *  it contain rfd_ring.buffer_info, do not double free */
 910         if (adapter->tpd_ring[0].buffer_info) {
 911                 kfree(adapter->tpd_ring[0].buffer_info);
 912                 adapter->tpd_ring[0].buffer_info = NULL;
 913         }
 914 }
 915
 916 /*
 917  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 918  * @adapter: board private structure
 919  *
 920  * Return 0 on success, negative on failure
 921  */
 922 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 923 {
 924         struct pci_dev *pdev = adapter->pdev;
 925         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 926         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 927         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 928         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 929         int size;
 930         int i;
 931         int count = 0;
 932         int rx_desc_count = 0;
 933         u32 offset = 0;
 934
 935         rrd_ring->count = rfd_ring->count;
 936         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 937                 tpd_ring[i].count = tpd_ring[0].count;
 938
 939         /* 2 tpd queue, one high priority queue,
 940          * another normal priority queue */
 941         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 942                 rfd_ring->count);
 943         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 944         if (unlikely(!tpd_ring->buffer_info)) {
 945                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 946                         size);
 947                 goto err_nomem;
 948         }
 949         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 950                 tpd_ring[i].buffer_info =
 951                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 952                 count += tpd_ring[i].count;
 953         }
 954
 955         rfd_ring->buffer_info =
 956                 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 957         count += rfd_ring->count;
 958         rx_desc_count += rfd_ring->count;
 959
 960         /*
 961          * real ring DMA buffer
 962          * each ring/block may need up to 8 bytes for alignment, hence the
 963          * additional bytes tacked onto the end.
 964          */
 965         ring_header->size = size =
 966                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 967                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 968                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 969                 8 * 4;
 970
 971         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 972                                 &ring_header->dma);
 973         if (unlikely(!ring_header->desc)) {
 974                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 975                 goto err_nomem;
 976         }
 977         memset(ring_header->desc, 0, ring_header->size);
 978         /* init TPD ring */
 979
 980         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 981         offset = tpd_ring[0].dma - ring_header->dma;
 982         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 983                 tpd_ring[i].dma = ring_header->dma + offset;
 984                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 985                 tpd_ring[i].size =
 986                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 987                 offset += roundup(tpd_ring[i].size, 8);
 988         }
 989         /* init RFD ring */
 990         rfd_ring->dma = ring_header->dma + offset;
 991         rfd_ring->desc = (u8 *) ring_header->desc + offset;
 992         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
 993         offset += roundup(rfd_ring->size, 8);
 994
 995         /* init RRD ring */
 996         rrd_ring->dma = ring_header->dma + offset;
 997         rrd_ring->desc = (u8 *) ring_header->desc + offset;
 998         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
 999                 rrd_ring->count;
1000         offset += roundup(rrd_ring->size, 8);
1001
1002         return 0;
1003
1004 err_nomem:
1005         kfree(tpd_ring->buffer_info);
1006         return -ENOMEM;
1007 }
1008
1009 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1010 {
1011         struct atl1c_hw *hw = &adapter->hw;
1012         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1013         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1014         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1015                                 adapter->tpd_ring;
1016         u32 data;
1017
1018         /* TPD */
1019         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1020                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1021                                 AT_DMA_HI_ADDR_MASK) >> 32));
1022         /* just enable normal priority TX queue */
1023         AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1024                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1025                                 AT_DMA_LO_ADDR_MASK));
1026         AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1027                         (u32)(tpd_ring[atl1c_trans_high].dma &
1028                                 AT_DMA_LO_ADDR_MASK));
1029         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1030                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1031
1032
1033         /* RFD */
1034         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1035                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1036         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1037                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1038
1039         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1040                         rfd_ring->count & RFD_RING_SIZE_MASK);
1041         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1042                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1043
1044         /* RRD */
1045         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1046                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1047         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1048                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1049
1050         if (hw->nic_type == athr_l2c_b) {
1051                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1052                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1053                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1054                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1055                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1056                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1057                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1058                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1059         }
1060         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d_2) {
1061                         /* Power Saving for L2c_B */
1062                 AT_READ_REG(hw, REG_SERDES_LOCK, &data);
1063                 data |= SERDES_MAC_CLK_SLOWDOWN;
1064                 data |= SERDES_PYH_CLK_SLOWDOWN;
1065                 AT_WRITE_REG(hw, REG_SERDES_LOCK, data);
1066         }
1067         /* Load all of base address above */
1068         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1069 }
1070
1071 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1072 {
1073         struct atl1c_hw *hw = &adapter->hw;
1074         int max_pay_load;
1075         u16 tx_offload_thresh;
1076         u32 txq_ctrl_data;
1077
1078         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1079         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1080                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1081         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1082         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1083         /*
1084          * if BIOS had changed the dam-read-max-length to an invalid value,
1085          * restore it to default value
1086          */
1087         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1088                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1089                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1090         }
1091         txq_ctrl_data =
1092                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1093                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1094
1095         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1096 }
1097
1098 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1099 {
1100         struct atl1c_hw *hw = &adapter->hw;
1101         u32 rxq_ctrl_data;
1102
1103         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1104                         RXQ_RFD_BURST_NUM_SHIFT;
1105
1106         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1107                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1108
1109         /* aspm for gigabit */
1110         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1111                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1112                         ASPM_THRUPUT_LIMIT_100M);
1113
1114         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1115 }
1116
1117 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1118 {
1119         struct atl1c_hw *hw = &adapter->hw;
1120         u32 dma_ctrl_data;
1121
1122         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1123                 DMA_CTRL_RREQ_PRI_DATA |
1124                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1125                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1126                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1127
1128         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1129 }
1130
1131 /*
1132  * Stop the mac, transmit and receive units
1133  * hw - Struct containing variables accessed by shared code
1134  * return : 0  or  idle status (if error)
1135  */
1136 static int atl1c_stop_mac(struct atl1c_hw *hw)
1137 {
1138         u32 data;
1139
1140         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1141         data &= ~RXQ_CTRL_EN;
1142         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1143
1144         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1145         data &= ~TXQ_CTRL_EN;
1146         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1147
1148         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1149
1150         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1151         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1152         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1153
1154         return (int)atl1c_wait_until_idle(hw,
1155                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1156 }
1157
1158 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1159 {
1160         u32 data;
1161
1162         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1163         data |= RXQ_CTRL_EN;
1164         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1165 }
1166
1167 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1168 {
1169         u32 data;
1170
1171         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1172         data |= TXQ_CTRL_EN;
1173         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1174 }
1175
1176 /*
1177  * Reset the transmit and receive units; mask and clear all interrupts.
1178  * hw - Struct containing variables accessed by shared code
1179  * return : 0  or  idle status (if error)
1180  */
1181 static int atl1c_reset_mac(struct atl1c_hw *hw)
1182 {
1183         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1184         struct pci_dev *pdev = adapter->pdev;
1185         u32 master_ctrl_data = 0;
1186
1187         AT_WRITE_REG(hw, REG_IMR, 0);
1188         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1189
1190         atl1c_stop_mac(hw);
1191         /*
1192          * Issue Soft Reset to the MAC.  This will reset the chip's
1193          * transmit, receive, DMA.  It will not effect
1194          * the current PCI configuration.  The global reset bit is self-
1195          * clearing, and should clear within a microsecond.
1196          */
1197         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1198         master_ctrl_data |= MASTER_CTRL_OOB_DIS;
1199         AT_WRITE_REG(hw, REG_MASTER_CTRL,
1200                 master_ctrl_data | MASTER_CTRL_SOFT_RST);
1201
1202         AT_WRITE_FLUSH(hw);
1203         msleep(10);
1204         /* Wait at least 10ms for All module to be Idle */
1205
1206         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1207                 dev_err(&pdev->dev,
1208                         "MAC state machine can't be idle since"
1209                         " disabled for 10ms second\n");
1210                 return -1;
1211         }
1212         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1213
1214         return 0;
1215 }
1216
1217 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1218 {
1219         u16 ctrl_flags = hw->ctrl_flags;
1220
1221         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1222         atl1c_set_aspm(hw, SPEED_0);
1223         hw->ctrl_flags = ctrl_flags;
1224 }
1225
1226 /*
1227  * Set ASPM state.
1228  * Enable/disable L0s/L1 depend on link state.
1229  */
1230 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1231 {
1232         u32 pm_ctrl_data;
1233         u32 link_l1_timer;
1234
1235         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1236         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1237                           PM_CTRL_ASPM_L0S_EN |
1238                           PM_CTRL_MAC_ASPM_CHK);
1239         /* L1 timer */
1240         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1241                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1242                 link_l1_timer =
1243                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1244                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1245                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1246                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1247         } else {
1248                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1249                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1250                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1251                         link_l1_timer = 1;
1252                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1253                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1254         }
1255
1256         /* L0S/L1 enable */
1257         if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1258                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1259         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1260                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1261
1262         /* l2cb & l1d & l2cb2 & l1d2 */
1263         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1264             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1265                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1266                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1267                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1268                                 PM_CTRL_SERDES_PD_EX_L1 |
1269                                 PM_CTRL_CLK_SWH_L1;
1270                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1271                                   PM_CTRL_SERDES_PLL_L1_EN |
1272                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1273                                   PM_CTRL_SA_DLY_EN |
1274                                   PM_CTRL_HOTRST);
1275                 /* disable l0s if link down or l2cb */
1276                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1277                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1278         } else { /* l1c */
1279                 pm_ctrl_data =
1280                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1281                 if (link_speed != SPEED_0) {
1282                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1283                                         PM_CTRL_SERDES_PLL_L1_EN |
1284                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1285                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1286                                           PM_CTRL_CLK_SWH_L1 |
1287                                           PM_CTRL_ASPM_L0S_EN |
1288                                           PM_CTRL_ASPM_L1_EN);
1289                 } else { /* link down */
1290                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1291                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1292                                           PM_CTRL_SERDES_PLL_L1_EN |
1293                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1294                                           PM_CTRL_ASPM_L0S_EN);
1295                 }
1296         }
1297         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1298
1299         return;
1300 }
1301
1302 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1303 {
1304         struct atl1c_hw *hw = &adapter->hw;
1305         struct net_device *netdev = adapter->netdev;
1306         u32 mac_ctrl_data;
1307
1308         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1309         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1310
1311         if (adapter->link_duplex == FULL_DUPLEX) {
1312                 hw->mac_duplex = true;
1313                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1314         }
1315
1316         if (adapter->link_speed == SPEED_1000)
1317                 hw->mac_speed = atl1c_mac_speed_1000;
1318         else
1319                 hw->mac_speed = atl1c_mac_speed_10_100;
1320
1321         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1322                         MAC_CTRL_SPEED_SHIFT;
1323
1324         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1325         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1326                         MAC_CTRL_PRMLEN_SHIFT);
1327
1328         __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
1329
1330         mac_ctrl_data |= MAC_CTRL_BC_EN;
1331         if (netdev->flags & IFF_PROMISC)
1332                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1333         if (netdev->flags & IFF_ALLMULTI)
1334                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1335
1336         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1337         if (hw->nic_type == athr_l1d || hw->nic_type == athr_l2c_b2 ||
1338             hw->nic_type == athr_l1d_2) {
1339                 mac_ctrl_data |= MAC_CTRL_SPEED_MODE_SW;
1340                 mac_ctrl_data |= MAC_CTRL_HASH_ALG_CRC32;
1341         }
1342         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1343 }
1344
1345 /*
1346  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1347  * @adapter: board private structure
1348  *
1349  * Configure the Tx /Rx unit of the MAC after a reset.
1350  */
1351 static int atl1c_configure(struct atl1c_adapter *adapter)
1352 {
1353         struct atl1c_hw *hw = &adapter->hw;
1354         u32 master_ctrl_data = 0;
1355         u32 intr_modrt_data;
1356         u32 data;
1357
1358         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1359         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1360                               MASTER_CTRL_RX_ITIMER_EN |
1361                               MASTER_CTRL_INT_RDCLR);
1362         /* clear interrupt status */
1363         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1364         /*  Clear any WOL status */
1365         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1366         /* set Interrupt Clear Timer
1367          * HW will enable self to assert interrupt event to system after
1368          * waiting x-time for software to notify it accept interrupt.
1369          */
1370
1371         data = CLK_GATING_EN_ALL;
1372         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1373                 if (hw->nic_type == athr_l2c_b)
1374                         data &= ~CLK_GATING_RXMAC_EN;
1375         } else
1376                 data = 0;
1377         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1378
1379         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1380                 hw->ict & INT_RETRIG_TIMER_MASK);
1381
1382         atl1c_configure_des_ring(adapter);
1383
1384         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1385                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1386                                         IRQ_MODRT_TX_TIMER_SHIFT;
1387                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1388                                         IRQ_MODRT_RX_TIMER_SHIFT;
1389                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1390                 master_ctrl_data |=
1391                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1392         }
1393
1394         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1395                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1396
1397         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1398         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1399
1400         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1401                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1402
1403         /* set MTU */
1404         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1405                         VLAN_HLEN + ETH_FCS_LEN);
1406
1407         atl1c_configure_tx(adapter);
1408         atl1c_configure_rx(adapter);
1409         atl1c_configure_dma(adapter);
1410
1411         return 0;
1412 }
1413
1414 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1415 {
1416         u16 hw_reg_addr = 0;
1417         unsigned long *stats_item = NULL;
1418         u32 data;
1419
1420         /* update rx status */
1421         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1422         stats_item  = &adapter->hw_stats.rx_ok;
1423         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1424                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1425                 *stats_item += data;
1426                 stats_item++;
1427                 hw_reg_addr += 4;
1428         }
1429 /* update tx status */
1430         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1431         stats_item  = &adapter->hw_stats.tx_ok;
1432         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1433                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1434                 *stats_item += data;
1435                 stats_item++;
1436                 hw_reg_addr += 4;
1437         }
1438 }
1439
1440 /*
1441  * atl1c_get_stats - Get System Network Statistics
1442  * @netdev: network interface device structure
1443  *
1444  * Returns the address of the device statistics structure.
1445  * The statistics are actually updated from the timer callback.
1446  */
1447 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1448 {
1449         struct atl1c_adapter *adapter = netdev_priv(netdev);
1450         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1451         struct net_device_stats *net_stats = &netdev->stats;
1452
1453         atl1c_update_hw_stats(adapter);
1454         net_stats->rx_packets = hw_stats->rx_ok;
1455         net_stats->tx_packets = hw_stats->tx_ok;
1456         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1457         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1458         net_stats->multicast  = hw_stats->rx_mcast;
1459         net_stats->collisions = hw_stats->tx_1_col +
1460                                 hw_stats->tx_2_col * 2 +
1461                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1462         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1463                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1464                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1465         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1466         net_stats->rx_length_errors = hw_stats->rx_len_err;
1467         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1468         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1469         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1470
1471         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1472
1473         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1474                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1475         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1476         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1477         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1478
1479         return net_stats;
1480 }
1481
1482 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1483 {
1484         u16 phy_data;
1485
1486         spin_lock(&adapter->mdio_lock);
1487         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1488         spin_unlock(&adapter->mdio_lock);
1489 }
1490
1491 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1492                                 enum atl1c_trans_queue type)
1493 {
1494         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1495                                 &adapter->tpd_ring[type];
1496         struct atl1c_buffer *buffer_info;
1497         struct pci_dev *pdev = adapter->pdev;
1498         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1499         u16 hw_next_to_clean;
1500         u16 reg;
1501
1502         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1503
1504         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1505
1506         while (next_to_clean != hw_next_to_clean) {
1507                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1508                 atl1c_clean_buffer(pdev, buffer_info, 1);
1509                 if (++next_to_clean == tpd_ring->count)
1510                         next_to_clean = 0;
1511                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1512         }
1513
1514         if (netif_queue_stopped(adapter->netdev) &&
1515                         netif_carrier_ok(adapter->netdev)) {
1516                 netif_wake_queue(adapter->netdev);
1517         }
1518
1519         return true;
1520 }
1521
1522 /*
1523  * atl1c_intr - Interrupt Handler
1524  * @irq: interrupt number
1525  * @data: pointer to a network interface device structure
1526  * @pt_regs: CPU registers structure
1527  */
1528 static irqreturn_t atl1c_intr(int irq, void *data)
1529 {
1530         struct net_device *netdev  = data;
1531         struct atl1c_adapter *adapter = netdev_priv(netdev);
1532         struct pci_dev *pdev = adapter->pdev;
1533         struct atl1c_hw *hw = &adapter->hw;
1534         int max_ints = AT_MAX_INT_WORK;
1535         int handled = IRQ_NONE;
1536         u32 status;
1537         u32 reg_data;
1538
1539         do {
1540                 AT_READ_REG(hw, REG_ISR, &reg_data);
1541                 status = reg_data & hw->intr_mask;
1542
1543                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1544                         if (max_ints != AT_MAX_INT_WORK)
1545                                 handled = IRQ_HANDLED;
1546                         break;
1547                 }
1548                 /* link event */
1549                 if (status & ISR_GPHY)
1550                         atl1c_clear_phy_int(adapter);
1551                 /* Ack ISR */
1552                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1553                 if (status & ISR_RX_PKT) {
1554                         if (likely(napi_schedule_prep(&adapter->napi))) {
1555                                 hw->intr_mask &= ~ISR_RX_PKT;
1556                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1557                                 __napi_schedule(&adapter->napi);
1558                         }
1559                 }
1560                 if (status & ISR_TX_PKT)
1561                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1562
1563                 handled = IRQ_HANDLED;
1564                 /* check if PCIE PHY Link down */
1565                 if (status & ISR_ERROR) {
1566                         if (netif_msg_hw(adapter))
1567                                 dev_err(&pdev->dev,
1568                                         "atl1c hardware error (status = 0x%x)\n",
1569                                         status & ISR_ERROR);
1570                         /* reset MAC */
1571                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1572                         schedule_work(&adapter->common_task);
1573                         return IRQ_HANDLED;
1574                 }
1575
1576                 if (status & ISR_OVER)
1577                         if (netif_msg_intr(adapter))
1578                                 dev_warn(&pdev->dev,
1579                                         "TX/RX overflow (status = 0x%x)\n",
1580                                         status & ISR_OVER);
1581
1582                 /* link event */
1583                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1584                         netdev->stats.tx_carrier_errors++;
1585                         atl1c_link_chg_event(adapter);
1586                         break;
1587                 }
1588
1589         } while (--max_ints > 0);
1590         /* re-enable Interrupt*/
1591         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1592         return handled;
1593 }
1594
1595 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1596                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1597 {
1598         /*
1599          * The pid field in RRS in not correct sometimes, so we
1600          * cannot figure out if the packet is fragmented or not,
1601          * so we tell the KERNEL CHECKSUM_NONE
1602          */
1603         skb_checksum_none_assert(skb);
1604 }
1605
1606 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1607 {
1608         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1609         struct pci_dev *pdev = adapter->pdev;
1610         struct atl1c_buffer *buffer_info, *next_info;
1611         struct sk_buff *skb;
1612         void *vir_addr = NULL;
1613         u16 num_alloc = 0;
1614         u16 rfd_next_to_use, next_next;
1615         struct atl1c_rx_free_desc *rfd_desc;
1616
1617         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1618         if (++next_next == rfd_ring->count)
1619                 next_next = 0;
1620         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1621         next_info = &rfd_ring->buffer_info[next_next];
1622
1623         while (next_info->flags & ATL1C_BUFFER_FREE) {
1624                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1625
1626                 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len);
1627                 if (unlikely(!skb)) {
1628                         if (netif_msg_rx_err(adapter))
1629                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1630                         break;
1631                 }
1632
1633                 /*
1634                  * Make buffer alignment 2 beyond a 16 byte boundary
1635                  * this will result in a 16 byte aligned IP header after
1636                  * the 14 byte MAC header is removed
1637                  */
1638                 vir_addr = skb->data;
1639                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1640                 buffer_info->skb = skb;
1641                 buffer_info->length = adapter->rx_buffer_len;
1642                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1643                                                 buffer_info->length,
1644                                                 PCI_DMA_FROMDEVICE);
1645                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1646                         ATL1C_PCIMAP_FROMDEVICE);
1647                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1648                 rfd_next_to_use = next_next;
1649                 if (++next_next == rfd_ring->count)
1650                         next_next = 0;
1651                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1652                 next_info = &rfd_ring->buffer_info[next_next];
1653                 num_alloc++;
1654         }
1655
1656         if (num_alloc) {
1657                 /* TODO: update mailbox here */
1658                 wmb();
1659                 rfd_ring->next_to_use = rfd_next_to_use;
1660                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1661                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1662         }
1663
1664         return num_alloc;
1665 }
1666
1667 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1668                         struct  atl1c_recv_ret_status *rrs, u16 num)
1669 {
1670         u16 i;
1671         /* the relationship between rrd and rfd is one map one */
1672         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1673                                         rrd_ring->next_to_clean)) {
1674                 rrs->word3 &= ~RRS_RXD_UPDATED;
1675                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1676                         rrd_ring->next_to_clean = 0;
1677         }
1678 }
1679
1680 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1681         struct atl1c_recv_ret_status *rrs, u16 num)
1682 {
1683         u16 i;
1684         u16 rfd_index;
1685         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1686
1687         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1688                         RRS_RX_RFD_INDEX_MASK;
1689         for (i = 0; i < num; i++) {
1690                 buffer_info[rfd_index].skb = NULL;
1691                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1692                                         ATL1C_BUFFER_FREE);
1693                 if (++rfd_index == rfd_ring->count)
1694                         rfd_index = 0;
1695         }
1696         rfd_ring->next_to_clean = rfd_index;
1697 }
1698
1699 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1700                    int *work_done, int work_to_do)
1701 {
1702         u16 rfd_num, rfd_index;
1703         u16 count = 0;
1704         u16 length;
1705         struct pci_dev *pdev = adapter->pdev;
1706         struct net_device *netdev  = adapter->netdev;
1707         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1708         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1709         struct sk_buff *skb;
1710         struct atl1c_recv_ret_status *rrs;
1711         struct atl1c_buffer *buffer_info;
1712
1713         while (1) {
1714                 if (*work_done >= work_to_do)
1715                         break;
1716                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1717                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1718                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1719                                 RRS_RX_RFD_CNT_MASK;
1720                         if (unlikely(rfd_num != 1))
1721                                 /* TODO support mul rfd*/
1722                                 if (netif_msg_rx_err(adapter))
1723                                         dev_warn(&pdev->dev,
1724                                                 "Multi rfd not support yet!\n");
1725                         goto rrs_checked;
1726                 } else {
1727                         break;
1728                 }
1729 rrs_checked:
1730                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1731                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1732                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1733                                 if (netif_msg_rx_err(adapter))
1734                                         dev_warn(&pdev->dev,
1735                                                 "wrong packet! rrs word3 is %x\n",
1736                                                 rrs->word3);
1737                         continue;
1738                 }
1739
1740                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1741                                 RRS_PKT_SIZE_MASK);
1742                 /* Good Receive */
1743                 if (likely(rfd_num == 1)) {
1744                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1745                                         RRS_RX_RFD_INDEX_MASK;
1746                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1747                         pci_unmap_single(pdev, buffer_info->dma,
1748                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1749                         skb = buffer_info->skb;
1750                 } else {
1751                         /* TODO */
1752                         if (netif_msg_rx_err(adapter))
1753                                 dev_warn(&pdev->dev,
1754                                         "Multi rfd not support yet!\n");
1755                         break;
1756                 }
1757                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1758                 skb_put(skb, length - ETH_FCS_LEN);
1759                 skb->protocol = eth_type_trans(skb, netdev);
1760                 atl1c_rx_checksum(adapter, skb, rrs);
1761                 if (rrs->word3 & RRS_VLAN_INS) {
1762                         u16 vlan;
1763
1764                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1765                         vlan = le16_to_cpu(vlan);
1766                         __vlan_hwaccel_put_tag(skb, vlan);
1767                 }
1768                 netif_receive_skb(skb);
1769
1770                 (*work_done)++;
1771                 count++;
1772         }
1773         if (count)
1774                 atl1c_alloc_rx_buffer(adapter);
1775 }
1776
1777 /*
1778  * atl1c_clean - NAPI Rx polling callback
1779  * @adapter: board private structure
1780  */
1781 static int atl1c_clean(struct napi_struct *napi, int budget)
1782 {
1783         struct atl1c_adapter *adapter =
1784                         container_of(napi, struct atl1c_adapter, napi);
1785         int work_done = 0;
1786
1787         /* Keep link state information with original netdev */
1788         if (!netif_carrier_ok(adapter->netdev))
1789                 goto quit_polling;
1790         /* just enable one RXQ */
1791         atl1c_clean_rx_irq(adapter, &work_done, budget);
1792
1793         if (work_done < budget) {
1794 quit_polling:
1795                 napi_complete(napi);
1796                 adapter->hw.intr_mask |= ISR_RX_PKT;
1797                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1798         }
1799         return work_done;
1800 }
1801
1802 #ifdef CONFIG_NET_POLL_CONTROLLER
1803
1804 /*
1805  * Polling 'interrupt' - used by things like netconsole to send skbs
1806  * without having to re-enable interrupts. It's not called while
1807  * the interrupt routine is executing.
1808  */
1809 static void atl1c_netpoll(struct net_device *netdev)
1810 {
1811         struct atl1c_adapter *adapter = netdev_priv(netdev);
1812
1813         disable_irq(adapter->pdev->irq);
1814         atl1c_intr(adapter->pdev->irq, netdev);
1815         enable_irq(adapter->pdev->irq);
1816 }
1817 #endif
1818
1819 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1820 {
1821         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1822         u16 next_to_use = 0;
1823         u16 next_to_clean = 0;
1824
1825         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1826         next_to_use   = tpd_ring->next_to_use;
1827
1828         return (u16)(next_to_clean > next_to_use) ?
1829                 (next_to_clean - next_to_use - 1) :
1830                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1831 }
1832
1833 /*
1834  * get next usable tpd
1835  * Note: should call atl1c_tdp_avail to make sure
1836  * there is enough tpd to use
1837  */
1838 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1839         enum atl1c_trans_queue type)
1840 {
1841         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1842         struct atl1c_tpd_desc *tpd_desc;
1843         u16 next_to_use = 0;
1844
1845         next_to_use = tpd_ring->next_to_use;
1846         if (++tpd_ring->next_to_use == tpd_ring->count)
1847                 tpd_ring->next_to_use = 0;
1848         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1849         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1850         return  tpd_desc;
1851 }
1852
1853 static struct atl1c_buffer *
1854 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1855 {
1856         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1857
1858         return &tpd_ring->buffer_info[tpd -
1859                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1860 }
1861
1862 /* Calculate the transmit packet descript needed*/
1863 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1864 {
1865         u16 tpd_req;
1866         u16 proto_hdr_len = 0;
1867
1868         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1869
1870         if (skb_is_gso(skb)) {
1871                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1872                 if (proto_hdr_len < skb_headlen(skb))
1873                         tpd_req++;
1874                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1875                         tpd_req++;
1876         }
1877         return tpd_req;
1878 }
1879
1880 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1881                           struct sk_buff *skb,
1882                           struct atl1c_tpd_desc **tpd,
1883                           enum atl1c_trans_queue type)
1884 {
1885         struct pci_dev *pdev = adapter->pdev;
1886         u8 hdr_len;
1887         u32 real_len;
1888         unsigned short offload_type;
1889         int err;
1890
1891         if (skb_is_gso(skb)) {
1892                 if (skb_header_cloned(skb)) {
1893                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1894                         if (unlikely(err))
1895                                 return -1;
1896                 }
1897                 offload_type = skb_shinfo(skb)->gso_type;
1898
1899                 if (offload_type & SKB_GSO_TCPV4) {
1900                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1901                                         + ntohs(ip_hdr(skb)->tot_len));
1902
1903                         if (real_len < skb->len)
1904                                 pskb_trim(skb, real_len);
1905
1906                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1907                         if (unlikely(skb->len == hdr_len)) {
1908                                 /* only xsum need */
1909                                 if (netif_msg_tx_queued(adapter))
1910                                         dev_warn(&pdev->dev,
1911                                                 "IPV4 tso with zero data??\n");
1912                                 goto check_sum;
1913                         } else {
1914                                 ip_hdr(skb)->check = 0;
1915                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1916                                                         ip_hdr(skb)->saddr,
1917                                                         ip_hdr(skb)->daddr,
1918                                                         0, IPPROTO_TCP, 0);
1919                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1920                         }
1921                 }
1922
1923                 if (offload_type & SKB_GSO_TCPV6) {
1924                         struct atl1c_tpd_ext_desc *etpd =
1925                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1926
1927                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1928                         *tpd = atl1c_get_tpd(adapter, type);
1929                         ipv6_hdr(skb)->payload_len = 0;
1930                         /* check payload == 0 byte ? */
1931                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1932                         if (unlikely(skb->len == hdr_len)) {
1933                                 /* only xsum need */
1934                                 if (netif_msg_tx_queued(adapter))
1935                                         dev_warn(&pdev->dev,
1936                                                 "IPV6 tso with zero data??\n");
1937                                 goto check_sum;
1938                         } else
1939                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1940                                                 &ipv6_hdr(skb)->saddr,
1941                                                 &ipv6_hdr(skb)->daddr,
1942                                                 0, IPPROTO_TCP, 0);
1943                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1944                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1945                         etpd->pkt_len = cpu_to_le32(skb->len);
1946                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1947                 }
1948
1949                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1950                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1951                                 TPD_TCPHDR_OFFSET_SHIFT;
1952                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1953                                 TPD_MSS_SHIFT;
1954                 return 0;
1955         }
1956
1957 check_sum:
1958         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1959                 u8 css, cso;
1960                 cso = skb_checksum_start_offset(skb);
1961
1962                 if (unlikely(cso & 0x1)) {
1963                         if (netif_msg_tx_err(adapter))
1964                                 dev_err(&adapter->pdev->dev,
1965                                         "payload offset should not an event number\n");
1966                         return -1;
1967                 } else {
1968                         css = cso + skb->csum_offset;
1969
1970                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1971                                         TPD_PLOADOFFSET_SHIFT;
1972                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1973                                         TPD_CCSUM_OFFSET_SHIFT;
1974                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1975                 }
1976         }
1977         return 0;
1978 }
1979
1980 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1981                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1982                         enum atl1c_trans_queue type)
1983 {
1984         struct atl1c_tpd_desc *use_tpd = NULL;
1985         struct atl1c_buffer *buffer_info = NULL;
1986         u16 buf_len = skb_headlen(skb);
1987         u16 map_len = 0;
1988         u16 mapped_len = 0;
1989         u16 hdr_len = 0;
1990         u16 nr_frags;
1991         u16 f;
1992         int tso;
1993
1994         nr_frags = skb_shinfo(skb)->nr_frags;
1995         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
1996         if (tso) {
1997                 /* TSO */
1998                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1999                 use_tpd = tpd;
2000
2001                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2002                 buffer_info->length = map_len;
2003                 buffer_info->dma = pci_map_single(adapter->pdev,
2004                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2005                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2006                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2007                         ATL1C_PCIMAP_TODEVICE);
2008                 mapped_len += map_len;
2009                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2010                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2011         }
2012
2013         if (mapped_len < buf_len) {
2014                 /* mapped_len == 0, means we should use the first tpd,
2015                    which is given by caller  */
2016                 if (mapped_len == 0)
2017                         use_tpd = tpd;
2018                 else {
2019                         use_tpd = atl1c_get_tpd(adapter, type);
2020                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2021                 }
2022                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2023                 buffer_info->length = buf_len - mapped_len;
2024                 buffer_info->dma =
2025                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2026                                         buffer_info->length, PCI_DMA_TODEVICE);
2027                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2028                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2029                         ATL1C_PCIMAP_TODEVICE);
2030                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2031                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2032         }
2033
2034         for (f = 0; f < nr_frags; f++) {
2035                 struct skb_frag_struct *frag;
2036
2037                 frag = &skb_shinfo(skb)->frags[f];
2038
2039                 use_tpd = atl1c_get_tpd(adapter, type);
2040                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2041
2042                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2043                 buffer_info->length = skb_frag_size(frag);
2044                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2045                                                     frag, 0,
2046                                                     buffer_info->length,
2047                                                     DMA_TO_DEVICE);
2048                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2049                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2050                         ATL1C_PCIMAP_TODEVICE);
2051                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2052                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2053         }
2054
2055         /* The last tpd */
2056         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2057         /* The last buffer info contain the skb address,
2058            so it will be free after unmap */
2059         buffer_info->skb = skb;
2060 }
2061
2062 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2063                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2064 {
2065         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2066         u16 reg;
2067
2068         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2069         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2070 }
2071
2072 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2073                                           struct net_device *netdev)
2074 {
2075         struct atl1c_adapter *adapter = netdev_priv(netdev);
2076         unsigned long flags;
2077         u16 tpd_req = 1;
2078         struct atl1c_tpd_desc *tpd;
2079         enum atl1c_trans_queue type = atl1c_trans_normal;
2080
2081         if (test_bit(__AT_DOWN, &adapter->flags)) {
2082                 dev_kfree_skb_any(skb);
2083                 return NETDEV_TX_OK;
2084         }
2085
2086         tpd_req = atl1c_cal_tpd_req(skb);
2087         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2088                 if (netif_msg_pktdata(adapter))
2089                         dev_info(&adapter->pdev->dev, "tx locked\n");
2090                 return NETDEV_TX_LOCKED;
2091         }
2092
2093         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2094                 /* no enough descriptor, just stop queue */
2095                 netif_stop_queue(netdev);
2096                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2097                 return NETDEV_TX_BUSY;
2098         }
2099
2100         tpd = atl1c_get_tpd(adapter, type);
2101
2102         /* do TSO and check sum */
2103         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2104                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2105                 dev_kfree_skb_any(skb);
2106                 return NETDEV_TX_OK;
2107         }
2108
2109         if (unlikely(vlan_tx_tag_present(skb))) {
2110                 u16 vlan = vlan_tx_tag_get(skb);
2111                 __le16 tag;
2112
2113                 vlan = cpu_to_le16(vlan);
2114                 AT_VLAN_TO_TAG(vlan, tag);
2115                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2116                 tpd->vlan_tag = tag;
2117         }
2118
2119         if (skb_network_offset(skb) != ETH_HLEN)
2120                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2121
2122         atl1c_tx_map(adapter, skb, tpd, type);
2123         atl1c_tx_queue(adapter, skb, tpd, type);
2124
2125         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2126         return NETDEV_TX_OK;
2127 }
2128
2129 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2130 {
2131         struct net_device *netdev = adapter->netdev;
2132
2133         free_irq(adapter->pdev->irq, netdev);
2134
2135         if (adapter->have_msi)
2136                 pci_disable_msi(adapter->pdev);
2137 }
2138
2139 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2140 {
2141         struct pci_dev    *pdev   = adapter->pdev;
2142         struct net_device *netdev = adapter->netdev;
2143         int flags = 0;
2144         int err = 0;
2145
2146         adapter->have_msi = true;
2147         err = pci_enable_msi(adapter->pdev);
2148         if (err) {
2149                 if (netif_msg_ifup(adapter))
2150                         dev_err(&pdev->dev,
2151                                 "Unable to allocate MSI interrupt Error: %d\n",
2152                                 err);
2153                 adapter->have_msi = false;
2154         }
2155
2156         if (!adapter->have_msi)
2157                 flags |= IRQF_SHARED;
2158         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2159                         netdev->name, netdev);
2160         if (err) {
2161                 if (netif_msg_ifup(adapter))
2162                         dev_err(&pdev->dev,
2163                                 "Unable to allocate interrupt Error: %d\n",
2164                                 err);
2165                 if (adapter->have_msi)
2166                         pci_disable_msi(adapter->pdev);
2167                 return err;
2168         }
2169         if (netif_msg_ifup(adapter))
2170                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2171         return err;
2172 }
2173
2174 static int atl1c_up(struct atl1c_adapter *adapter)
2175 {
2176         struct net_device *netdev = adapter->netdev;
2177         int num;
2178         int err;
2179
2180         netif_carrier_off(netdev);
2181         atl1c_init_ring_ptrs(adapter);
2182         atl1c_set_multi(netdev);
2183         atl1c_restore_vlan(adapter);
2184
2185         num = atl1c_alloc_rx_buffer(adapter);
2186         if (unlikely(num == 0)) {
2187                 err = -ENOMEM;
2188                 goto err_alloc_rx;
2189         }
2190
2191         if (atl1c_configure(adapter)) {
2192                 err = -EIO;
2193                 goto err_up;
2194         }
2195
2196         err = atl1c_request_irq(adapter);
2197         if (unlikely(err))
2198                 goto err_up;
2199
2200         clear_bit(__AT_DOWN, &adapter->flags);
2201         napi_enable(&adapter->napi);
2202         atl1c_irq_enable(adapter);
2203         atl1c_check_link_status(adapter);
2204         netif_start_queue(netdev);
2205         return err;
2206
2207 err_up:
2208 err_alloc_rx:
2209         atl1c_clean_rx_ring(adapter);
2210         return err;
2211 }
2212
2213 static void atl1c_down(struct atl1c_adapter *adapter)
2214 {
2215         struct net_device *netdev = adapter->netdev;
2216
2217         atl1c_del_timer(adapter);
2218         adapter->work_event = 0; /* clear all event */
2219         /* signal that we're down so the interrupt handler does not
2220          * reschedule our watchdog timer */
2221         set_bit(__AT_DOWN, &adapter->flags);
2222         netif_carrier_off(netdev);
2223         napi_disable(&adapter->napi);
2224         atl1c_irq_disable(adapter);
2225         atl1c_free_irq(adapter);
2226         /* disable ASPM if device inactive */
2227         atl1c_disable_l0s_l1(&adapter->hw);
2228         /* reset MAC to disable all RX/TX */
2229         atl1c_reset_mac(&adapter->hw);
2230         msleep(1);
2231
2232         adapter->link_speed = SPEED_0;
2233         adapter->link_duplex = -1;
2234         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2235         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2236         atl1c_clean_rx_ring(adapter);
2237 }
2238
2239 /*
2240  * atl1c_open - Called when a network interface is made active
2241  * @netdev: network interface device structure
2242  *
2243  * Returns 0 on success, negative value on failure
2244  *
2245  * The open entry point is called when a network interface is made
2246  * active by the system (IFF_UP).  At this point all resources needed
2247  * for transmit and receive operations are allocated, the interrupt
2248  * handler is registered with the OS, the watchdog timer is started,
2249  * and the stack is notified that the interface is ready.
2250  */
2251 static int atl1c_open(struct net_device *netdev)
2252 {
2253         struct atl1c_adapter *adapter = netdev_priv(netdev);
2254         int err;
2255
2256         /* disallow open during test */
2257         if (test_bit(__AT_TESTING, &adapter->flags))
2258                 return -EBUSY;
2259
2260         /* allocate rx/tx dma buffer & descriptors */
2261         err = atl1c_setup_ring_resources(adapter);
2262         if (unlikely(err))
2263                 return err;
2264
2265         err = atl1c_up(adapter);
2266         if (unlikely(err))
2267                 goto err_up;
2268
2269         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2270                 u32 phy_data;
2271
2272                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2273                 phy_data |= MDIO_AP_EN;
2274                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2275         }
2276         return 0;
2277
2278 err_up:
2279         atl1c_free_irq(adapter);
2280         atl1c_free_ring_resources(adapter);
2281         atl1c_reset_mac(&adapter->hw);
2282         return err;
2283 }
2284
2285 /*
2286  * atl1c_close - Disables a network interface
2287  * @netdev: network interface device structure
2288  *
2289  * Returns 0, this is not allowed to fail
2290  *
2291  * The close entry point is called when an interface is de-activated
2292  * by the OS.  The hardware is still under the drivers control, but
2293  * needs to be disabled.  A global MAC reset is issued to stop the
2294  * hardware, and all transmit and receive resources are freed.
2295  */
2296 static int atl1c_close(struct net_device *netdev)
2297 {
2298         struct atl1c_adapter *adapter = netdev_priv(netdev);
2299
2300         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2301         atl1c_down(adapter);
2302         atl1c_free_ring_resources(adapter);
2303         return 0;
2304 }
2305
2306 static int atl1c_suspend(struct device *dev)
2307 {
2308         struct pci_dev *pdev = to_pci_dev(dev);
2309         struct net_device *netdev = pci_get_drvdata(pdev);
2310         struct atl1c_adapter *adapter = netdev_priv(netdev);
2311         struct atl1c_hw *hw = &adapter->hw;
2312         u32 mac_ctrl_data = 0;
2313         u32 master_ctrl_data = 0;
2314         u32 wol_ctrl_data = 0;
2315         u16 mii_intr_status_data = 0;
2316         u32 wufc = adapter->wol;
2317
2318         atl1c_disable_l0s_l1(hw);
2319         if (netif_running(netdev)) {
2320                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2321                 atl1c_down(adapter);
2322         }
2323         netif_device_detach(netdev);
2324
2325         if (wufc)
2326                 if (atl1c_phy_power_saving(hw) != 0)
2327                         dev_dbg(&pdev->dev, "phy power saving failed");
2328
2329         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2330         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
2331
2332         master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2333         mac_ctrl_data &= ~(MAC_CTRL_PRMLEN_MASK << MAC_CTRL_PRMLEN_SHIFT);
2334         mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2335                         MAC_CTRL_PRMLEN_MASK) <<
2336                         MAC_CTRL_PRMLEN_SHIFT);
2337         mac_ctrl_data &= ~(MAC_CTRL_SPEED_MASK << MAC_CTRL_SPEED_SHIFT);
2338         mac_ctrl_data &= ~MAC_CTRL_DUPLX;
2339
2340         if (wufc) {
2341                 mac_ctrl_data |= MAC_CTRL_RX_EN;
2342                 if (adapter->link_speed == SPEED_1000 ||
2343                         adapter->link_speed == SPEED_0) {
2344                         mac_ctrl_data |= atl1c_mac_speed_1000 <<
2345                                         MAC_CTRL_SPEED_SHIFT;
2346                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2347                 } else
2348                         mac_ctrl_data |= atl1c_mac_speed_10_100 <<
2349                                         MAC_CTRL_SPEED_SHIFT;
2350
2351                 if (adapter->link_duplex == DUPLEX_FULL)
2352                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2353
2354                 /* turn on magic packet wol */
2355                 if (wufc & AT_WUFC_MAG) {
2356                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2357                         if (hw->nic_type == athr_l2c_b &&
2358                             hw->revision_id == L2CB_V11) {
2359                                 wol_ctrl_data |=
2360                                         WOL_PATTERN_EN | WOL_PATTERN_PME_EN;
2361                         }
2362                 }
2363                 if (wufc & AT_WUFC_LNKC) {
2364                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2365                         /* only link up can wake up */
2366                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2367                                 dev_dbg(&pdev->dev, "%s: read write phy "
2368                                                   "register failed.\n",
2369                                                   atl1c_driver_name);
2370                         }
2371                 }
2372                 /* clear phy interrupt */
2373                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2374                 /* Config MAC Ctrl register */
2375                 __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
2376
2377                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2378                 if (wufc & AT_WUFC_MAG)
2379                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2380
2381                 dev_dbg(&pdev->dev,
2382                         "%s: suspend MAC=0x%x\n",
2383                         atl1c_driver_name, mac_ctrl_data);
2384                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2385                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2386                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2387
2388                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
2389                         GPHY_CTRL_EXT_RESET);
2390         } else {
2391                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_POWER_SAVING);
2392                 master_ctrl_data |= MASTER_CTRL_CLK_SEL_DIS;
2393                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2394                 mac_ctrl_data |= MAC_CTRL_DUPLX;
2395                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2396                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2397                 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2398                 hw->phy_configured = false; /* re-init PHY when resume */
2399         }
2400
2401         return 0;
2402 }
2403
2404 #ifdef CONFIG_PM_SLEEP
2405 static int atl1c_resume(struct device *dev)
2406 {
2407         struct pci_dev *pdev = to_pci_dev(dev);
2408         struct net_device *netdev = pci_get_drvdata(pdev);
2409         struct atl1c_adapter *adapter = netdev_priv(netdev);
2410
2411         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2412         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2413                         ATL1C_PCIE_PHY_RESET);
2414
2415         atl1c_phy_reset(&adapter->hw);
2416         atl1c_reset_mac(&adapter->hw);
2417         atl1c_phy_init(&adapter->hw);
2418
2419 #if 0
2420         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2421         pm_data &= ~PM_CTRLSTAT_PME_EN;
2422         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2423 #endif
2424
2425         netif_device_attach(netdev);
2426         if (netif_running(netdev))
2427                 atl1c_up(adapter);
2428
2429         return 0;
2430 }
2431 #endif
2432
2433 static void atl1c_shutdown(struct pci_dev *pdev)
2434 {
2435         struct net_device *netdev = pci_get_drvdata(pdev);
2436         struct atl1c_adapter *adapter = netdev_priv(netdev);
2437
2438         atl1c_suspend(&pdev->dev);
2439         pci_wake_from_d3(pdev, adapter->wol);
2440         pci_set_power_state(pdev, PCI_D3hot);
2441 }
2442
2443 static const struct net_device_ops atl1c_netdev_ops = {
2444         .ndo_open               = atl1c_open,
2445         .ndo_stop               = atl1c_close,
2446         .ndo_validate_addr      = eth_validate_addr,
2447         .ndo_start_xmit         = atl1c_xmit_frame,
2448         .ndo_set_mac_address    = atl1c_set_mac_addr,
2449         .ndo_set_rx_mode        = atl1c_set_multi,
2450         .ndo_change_mtu         = atl1c_change_mtu,
2451         .ndo_fix_features       = atl1c_fix_features,
2452         .ndo_set_features       = atl1c_set_features,
2453         .ndo_do_ioctl           = atl1c_ioctl,
2454         .ndo_tx_timeout         = atl1c_tx_timeout,
2455         .ndo_get_stats          = atl1c_get_stats,
2456 #ifdef CONFIG_NET_POLL_CONTROLLER
2457         .ndo_poll_controller    = atl1c_netpoll,
2458 #endif
2459 };
2460
2461 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2462 {
2463         SET_NETDEV_DEV(netdev, &pdev->dev);
2464         pci_set_drvdata(pdev, netdev);
2465
2466         netdev->netdev_ops = &atl1c_netdev_ops;
2467         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2468         atl1c_set_ethtool_ops(netdev);
2469
2470         /* TODO: add when ready */
2471         netdev->hw_features =   NETIF_F_SG         |
2472                                 NETIF_F_HW_CSUM    |
2473                                 NETIF_F_HW_VLAN_RX |
2474                                 NETIF_F_TSO        |
2475                                 NETIF_F_TSO6;
2476         netdev->features =      netdev->hw_features |
2477                                 NETIF_F_HW_VLAN_TX;
2478         return 0;
2479 }
2480
2481 /*
2482  * atl1c_probe - Device Initialization Routine
2483  * @pdev: PCI device information struct
2484  * @ent: entry in atl1c_pci_tbl
2485  *
2486  * Returns 0 on success, negative on failure
2487  *
2488  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2489  * The OS initialization, configuring of the adapter private structure,
2490  * and a hardware reset occur.
2491  */
2492 static int __devinit atl1c_probe(struct pci_dev *pdev,
2493                                  const struct pci_device_id *ent)
2494 {
2495         struct net_device *netdev;
2496         struct atl1c_adapter *adapter;
2497         static int cards_found;
2498
2499         int err = 0;
2500
2501         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2502         err = pci_enable_device_mem(pdev);
2503         if (err) {
2504                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2505                 return err;
2506         }
2507
2508         /*
2509          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2510          * shared register for the high 32 bits, so only a single, aligned,
2511          * 4 GB physical address range can be used at a time.
2512          *
2513          * Supporting 64-bit DMA on this hardware is more trouble than it's
2514          * worth.  It is far easier to limit to 32-bit DMA than update
2515          * various kernel subsystems to support the mechanics required by a
2516          * fixed-high-32-bit system.
2517          */
2518         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2519             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2520                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2521                 goto err_dma;
2522         }
2523
2524         err = pci_request_regions(pdev, atl1c_driver_name);
2525         if (err) {
2526                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2527                 goto err_pci_reg;
2528         }
2529
2530         pci_set_master(pdev);
2531
2532         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2533         if (netdev == NULL) {
2534                 err = -ENOMEM;
2535                 goto err_alloc_etherdev;
2536         }
2537
2538         err = atl1c_init_netdev(netdev, pdev);
2539         if (err) {
2540                 dev_err(&pdev->dev, "init netdevice failed\n");
2541                 goto err_init_netdev;
2542         }
2543         adapter = netdev_priv(netdev);
2544         adapter->bd_number = cards_found;
2545         adapter->netdev = netdev;
2546         adapter->pdev = pdev;
2547         adapter->hw.adapter = adapter;
2548         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2549         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2550         if (!adapter->hw.hw_addr) {
2551                 err = -EIO;
2552                 dev_err(&pdev->dev, "cannot map device registers\n");
2553                 goto err_ioremap;
2554         }
2555
2556         /* init mii data */
2557         adapter->mii.dev = netdev;
2558         adapter->mii.mdio_read  = atl1c_mdio_read;
2559         adapter->mii.mdio_write = atl1c_mdio_write;
2560         adapter->mii.phy_id_mask = 0x1f;
2561         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2562         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2563         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2564                         (unsigned long)adapter);
2565         /* setup the private structure */
2566         err = atl1c_sw_init(adapter);
2567         if (err) {
2568                 dev_err(&pdev->dev, "net device private data init failed\n");
2569                 goto err_sw_init;
2570         }
2571         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2572                         ATL1C_PCIE_PHY_RESET);
2573
2574         /* Init GPHY as early as possible due to power saving issue  */
2575         atl1c_phy_reset(&adapter->hw);
2576
2577         err = atl1c_reset_mac(&adapter->hw);
2578         if (err) {
2579                 err = -EIO;
2580                 goto err_reset;
2581         }
2582
2583         /* reset the controller to
2584          * put the device in a known good starting state */
2585         err = atl1c_phy_init(&adapter->hw);
2586         if (err) {
2587                 err = -EIO;
2588                 goto err_reset;
2589         }
2590         if (atl1c_read_mac_addr(&adapter->hw)) {
2591                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2592                 netdev->addr_assign_type |= NET_ADDR_RANDOM;
2593         }
2594         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2595         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2596         if (netif_msg_probe(adapter))
2597                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2598                         adapter->hw.mac_addr);
2599
2600         atl1c_hw_set_mac_addr(&adapter->hw);
2601         INIT_WORK(&adapter->common_task, atl1c_common_task);
2602         adapter->work_event = 0;
2603         err = register_netdev(netdev);
2604         if (err) {
2605                 dev_err(&pdev->dev, "register netdevice failed\n");
2606                 goto err_register;
2607         }
2608
2609         if (netif_msg_probe(adapter))
2610                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2611         cards_found++;
2612         return 0;
2613
2614 err_reset:
2615 err_register:
2616 err_sw_init:
2617         iounmap(adapter->hw.hw_addr);
2618 err_init_netdev:
2619 err_ioremap:
2620         free_netdev(netdev);
2621 err_alloc_etherdev:
2622         pci_release_regions(pdev);
2623 err_pci_reg:
2624 err_dma:
2625         pci_disable_device(pdev);
2626         return err;
2627 }
2628
2629 /*
2630  * atl1c_remove - Device Removal Routine
2631  * @pdev: PCI device information struct
2632  *
2633  * atl1c_remove is called by the PCI subsystem to alert the driver
2634  * that it should release a PCI device.  The could be caused by a
2635  * Hot-Plug event, or because the driver is going to be removed from
2636  * memory.
2637  */
2638 static void __devexit atl1c_remove(struct pci_dev *pdev)
2639 {
2640         struct net_device *netdev = pci_get_drvdata(pdev);
2641         struct atl1c_adapter *adapter = netdev_priv(netdev);
2642
2643         unregister_netdev(netdev);
2644         atl1c_phy_disable(&adapter->hw);
2645
2646         iounmap(adapter->hw.hw_addr);
2647
2648         pci_release_regions(pdev);
2649         pci_disable_device(pdev);
2650         free_netdev(netdev);
2651 }
2652
2653 /*
2654  * atl1c_io_error_detected - called when PCI error is detected
2655  * @pdev: Pointer to PCI device
2656  * @state: The current pci connection state
2657  *
2658  * This function is called after a PCI bus error affecting
2659  * this device has been detected.
2660  */
2661 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2662                                                 pci_channel_state_t state)
2663 {
2664         struct net_device *netdev = pci_get_drvdata(pdev);
2665         struct atl1c_adapter *adapter = netdev_priv(netdev);
2666
2667         netif_device_detach(netdev);
2668
2669         if (state == pci_channel_io_perm_failure)
2670                 return PCI_ERS_RESULT_DISCONNECT;
2671
2672         if (netif_running(netdev))
2673                 atl1c_down(adapter);
2674
2675         pci_disable_device(pdev);
2676
2677         /* Request a slot slot reset. */
2678         return PCI_ERS_RESULT_NEED_RESET;
2679 }
2680
2681 /*
2682  * atl1c_io_slot_reset - called after the pci bus has been reset.
2683  * @pdev: Pointer to PCI device
2684  *
2685  * Restart the card from scratch, as if from a cold-boot. Implementation
2686  * resembles the first-half of the e1000_resume routine.
2687  */
2688 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2689 {
2690         struct net_device *netdev = pci_get_drvdata(pdev);
2691         struct atl1c_adapter *adapter = netdev_priv(netdev);
2692
2693         if (pci_enable_device(pdev)) {
2694                 if (netif_msg_hw(adapter))
2695                         dev_err(&pdev->dev,
2696                                 "Cannot re-enable PCI device after reset\n");
2697                 return PCI_ERS_RESULT_DISCONNECT;
2698         }
2699         pci_set_master(pdev);
2700
2701         pci_enable_wake(pdev, PCI_D3hot, 0);
2702         pci_enable_wake(pdev, PCI_D3cold, 0);
2703
2704         atl1c_reset_mac(&adapter->hw);
2705
2706         return PCI_ERS_RESULT_RECOVERED;
2707 }
2708
2709 /*
2710  * atl1c_io_resume - called when traffic can start flowing again.
2711  * @pdev: Pointer to PCI device
2712  *
2713  * This callback is called when the error recovery driver tells us that
2714  * its OK to resume normal operation. Implementation resembles the
2715  * second-half of the atl1c_resume routine.
2716  */
2717 static void atl1c_io_resume(struct pci_dev *pdev)
2718 {
2719         struct net_device *netdev = pci_get_drvdata(pdev);
2720         struct atl1c_adapter *adapter = netdev_priv(netdev);
2721
2722         if (netif_running(netdev)) {
2723                 if (atl1c_up(adapter)) {
2724                         if (netif_msg_hw(adapter))
2725                                 dev_err(&pdev->dev,
2726                                         "Cannot bring device back up after reset\n");
2727                         return;
2728                 }
2729         }
2730
2731         netif_device_attach(netdev);
2732 }
2733
2734 static struct pci_error_handlers atl1c_err_handler = {
2735         .error_detected = atl1c_io_error_detected,
2736         .slot_reset = atl1c_io_slot_reset,
2737         .resume = atl1c_io_resume,
2738 };
2739
2740 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2741
2742 static struct pci_driver atl1c_driver = {
2743         .name     = atl1c_driver_name,
2744         .id_table = atl1c_pci_tbl,
2745         .probe    = atl1c_probe,
2746         .remove   = __devexit_p(atl1c_remove),
2747         .shutdown = atl1c_shutdown,
2748         .err_handler = &atl1c_err_handler,
2749         .driver.pm = &atl1c_pm_ops,
2750 };
2751
2752 /*
2753  * atl1c_init_module - Driver Registration Routine
2754  *
2755  * atl1c_init_module is the first routine called when the driver is
2756  * loaded. All it does is register with the PCI subsystem.
2757  */
2758 static int __init atl1c_init_module(void)
2759 {
2760         return pci_register_driver(&atl1c_driver);
2761 }
2762
2763 /*
2764  * atl1c_exit_module - Driver Exit Cleanup Routine
2765  *
2766  * atl1c_exit_module is called just before the driver is removed
2767  * from memory.
2768  */
2769 static void __exit atl1c_exit_module(void)
2770 {
2771         pci_unregister_driver(&atl1c_driver);
2772 }
2773
2774 module_init(atl1c_init_module);
2775 module_exit(atl1c_exit_module);