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 & MDIO_REG_ADDR_MASK, &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 & MDIO_REG_ADDR_MASK, 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 phy_status_data;
 703         u32 link_ctrl_data;
 704
 705         atl1c_set_mac_type(hw);
 706         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 707         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 708
 709         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 710                          ATL1C_TXQ_MODE_ENHANCE;
 711         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 712                           ATL1C_ASPM_L1_SUPPORT;
 713         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 714
 715         if (hw->nic_type == athr_l1c ||
 716             hw->nic_type == athr_l1d ||
 717             hw->nic_type == athr_l1d_2)
 718                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 719         return 0;
 720 }
 721 /*
 722  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 723  * @adapter: board private structure to initialize
 724  *
 725  * atl1c_sw_init initializes the Adapter private data structure.
 726  * Fields are initialized based on PCI device information and
 727  * OS network device settings (MTU size).
 728  */
 729 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 730 {
 731         struct atl1c_hw *hw   = &adapter->hw;
 732         struct pci_dev  *pdev = adapter->pdev;
 733         u32 revision;
 734
 735
 736         adapter->wol = 0;
 737         device_set_wakeup_enable(&pdev->dev, false);
 738         adapter->link_speed = SPEED_0;
 739         adapter->link_duplex = FULL_DUPLEX;
 740         adapter->tpd_ring[0].count = 1024;
 741         adapter->rfd_ring.count = 512;
 742
 743         hw->vendor_id = pdev->vendor;
 744         hw->device_id = pdev->device;
 745         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 746         hw->subsystem_id = pdev->subsystem_device;
 747         AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
 748         hw->revision_id = revision & 0xFF;
 749         /* before link up, we assume hibernate is true */
 750         hw->hibernate = true;
 751         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 752         if (atl1c_setup_mac_funcs(hw) != 0) {
 753                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 754                 return -1;
 755         }
 756         hw->intr_mask = IMR_NORMAL_MASK;
 757         hw->phy_configured = false;
 758         hw->preamble_len = 7;
 759         hw->max_frame_size = adapter->netdev->mtu;
 760         hw->autoneg_advertised = ADVERTISED_Autoneg;
 761         hw->indirect_tab = 0xE4E4E4E4;
 762         hw->base_cpu = 0;
 763
 764         hw->ict = 50000;                /* 100ms */
 765         hw->smb_timer = 200000;         /* 400ms */
 766         hw->rx_imt = 200;
 767         hw->tx_imt = 1000;
 768
 769         hw->tpd_burst = 5;
 770         hw->rfd_burst = 8;
 771         hw->dma_order = atl1c_dma_ord_out;
 772         hw->dmar_block = atl1c_dma_req_1024;
 773
 774         if (atl1c_alloc_queues(adapter)) {
 775                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 776                 return -ENOMEM;
 777         }
 778         /* TODO */
 779         atl1c_set_rxbufsize(adapter, adapter->netdev);
 780         atomic_set(&adapter->irq_sem, 1);
 781         spin_lock_init(&adapter->mdio_lock);
 782         spin_lock_init(&adapter->tx_lock);
 783         set_bit(__AT_DOWN, &adapter->flags);
 784
 785         return 0;
 786 }
 787
 788 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 789                                 struct atl1c_buffer *buffer_info, int in_irq)
 790 {
 791         u16 pci_driection;
 792         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 793                 return;
 794         if (buffer_info->dma) {
 795                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 796                         pci_driection = PCI_DMA_FROMDEVICE;
 797                 else
 798                         pci_driection = PCI_DMA_TODEVICE;
 799
 800                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 801                         pci_unmap_single(pdev, buffer_info->dma,
 802                                         buffer_info->length, pci_driection);
 803                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 804                         pci_unmap_page(pdev, buffer_info->dma,
 805                                         buffer_info->length, pci_driection);
 806         }
 807         if (buffer_info->skb) {
 808                 if (in_irq)
 809                         dev_kfree_skb_irq(buffer_info->skb);
 810                 else
 811                         dev_kfree_skb(buffer_info->skb);
 812         }
 813         buffer_info->dma = 0;
 814         buffer_info->skb = NULL;
 815         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 816 }
 817 /*
 818  * atl1c_clean_tx_ring - Free Tx-skb
 819  * @adapter: board private structure
 820  */
 821 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 822                                 enum atl1c_trans_queue type)
 823 {
 824         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 825         struct atl1c_buffer *buffer_info;
 826         struct pci_dev *pdev = adapter->pdev;
 827         u16 index, ring_count;
 828
 829         ring_count = tpd_ring->count;
 830         for (index = 0; index < ring_count; index++) {
 831                 buffer_info = &tpd_ring->buffer_info[index];
 832                 atl1c_clean_buffer(pdev, buffer_info, 0);
 833         }
 834
 835         /* Zero out Tx-buffers */
 836         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 837                 ring_count);
 838         atomic_set(&tpd_ring->next_to_clean, 0);
 839         tpd_ring->next_to_use = 0;
 840 }
 841
 842 /*
 843  * atl1c_clean_rx_ring - Free rx-reservation skbs
 844  * @adapter: board private structure
 845  */
 846 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 847 {
 848         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 849         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 850         struct atl1c_buffer *buffer_info;
 851         struct pci_dev *pdev = adapter->pdev;
 852         int j;
 853
 854         for (j = 0; j < rfd_ring->count; j++) {
 855                 buffer_info = &rfd_ring->buffer_info[j];
 856                 atl1c_clean_buffer(pdev, buffer_info, 0);
 857         }
 858         /* zero out the descriptor ring */
 859         memset(rfd_ring->desc, 0, rfd_ring->size);
 860         rfd_ring->next_to_clean = 0;
 861         rfd_ring->next_to_use = 0;
 862         rrd_ring->next_to_use = 0;
 863         rrd_ring->next_to_clean = 0;
 864 }
 865
 866 /*
 867  * Read / Write Ptr Initialize:
 868  */
 869 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 870 {
 871         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 872         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 873         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 874         struct atl1c_buffer *buffer_info;
 875         int i, j;
 876
 877         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 878                 tpd_ring[i].next_to_use = 0;
 879                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 880                 buffer_info = tpd_ring[i].buffer_info;
 881                 for (j = 0; j < tpd_ring->count; j++)
 882                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 883                                         ATL1C_BUFFER_FREE);
 884         }
 885         rfd_ring->next_to_use = 0;
 886         rfd_ring->next_to_clean = 0;
 887         rrd_ring->next_to_use = 0;
 888         rrd_ring->next_to_clean = 0;
 889         for (j = 0; j < rfd_ring->count; j++) {
 890                 buffer_info = &rfd_ring->buffer_info[j];
 891                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 892         }
 893 }
 894
 895 /*
 896  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 897  * @adapter: board private structure
 898  *
 899  * Free all transmit software resources
 900  */
 901 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 902 {
 903         struct pci_dev *pdev = adapter->pdev;
 904
 905         pci_free_consistent(pdev, adapter->ring_header.size,
 906                                         adapter->ring_header.desc,
 907                                         adapter->ring_header.dma);
 908         adapter->ring_header.desc = NULL;
 909
 910         /* Note: just free tdp_ring.buffer_info,
 911         *  it contain rfd_ring.buffer_info, do not double free */
 912         if (adapter->tpd_ring[0].buffer_info) {
 913                 kfree(adapter->tpd_ring[0].buffer_info);
 914                 adapter->tpd_ring[0].buffer_info = NULL;
 915         }
 916 }
 917
 918 /*
 919  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 920  * @adapter: board private structure
 921  *
 922  * Return 0 on success, negative on failure
 923  */
 924 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 925 {
 926         struct pci_dev *pdev = adapter->pdev;
 927         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 928         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 929         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 930         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 931         int size;
 932         int i;
 933         int count = 0;
 934         int rx_desc_count = 0;
 935         u32 offset = 0;
 936
 937         rrd_ring->count = rfd_ring->count;
 938         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 939                 tpd_ring[i].count = tpd_ring[0].count;
 940
 941         /* 2 tpd queue, one high priority queue,
 942          * another normal priority queue */
 943         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 944                 rfd_ring->count);
 945         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 946         if (unlikely(!tpd_ring->buffer_info)) {
 947                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 948                         size);
 949                 goto err_nomem;
 950         }
 951         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 952                 tpd_ring[i].buffer_info =
 953                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 954                 count += tpd_ring[i].count;
 955         }
 956
 957         rfd_ring->buffer_info =
 958                 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 959         count += rfd_ring->count;
 960         rx_desc_count += rfd_ring->count;
 961
 962         /*
 963          * real ring DMA buffer
 964          * each ring/block may need up to 8 bytes for alignment, hence the
 965          * additional bytes tacked onto the end.
 966          */
 967         ring_header->size = size =
 968                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 969                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 970                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 971                 8 * 4;
 972
 973         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 974                                 &ring_header->dma);
 975         if (unlikely(!ring_header->desc)) {
 976                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 977                 goto err_nomem;
 978         }
 979         memset(ring_header->desc, 0, ring_header->size);
 980         /* init TPD ring */
 981
 982         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 983         offset = tpd_ring[0].dma - ring_header->dma;
 984         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 985                 tpd_ring[i].dma = ring_header->dma + offset;
 986                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 987                 tpd_ring[i].size =
 988                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 989                 offset += roundup(tpd_ring[i].size, 8);
 990         }
 991         /* init RFD ring */
 992         rfd_ring->dma = ring_header->dma + offset;
 993         rfd_ring->desc = (u8 *) ring_header->desc + offset;
 994         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
 995         offset += roundup(rfd_ring->size, 8);
 996
 997         /* init RRD ring */
 998         rrd_ring->dma = ring_header->dma + offset;
 999         rrd_ring->desc = (u8 *) ring_header->desc + offset;
1000         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1001                 rrd_ring->count;
1002         offset += roundup(rrd_ring->size, 8);
1003
1004         return 0;
1005
1006 err_nomem:
1007         kfree(tpd_ring->buffer_info);
1008         return -ENOMEM;
1009 }
1010
1011 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1012 {
1013         struct atl1c_hw *hw = &adapter->hw;
1014         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1015         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1016         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1017                                 adapter->tpd_ring;
1018         u32 data;
1019
1020         /* TPD */
1021         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1022                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1023                                 AT_DMA_HI_ADDR_MASK) >> 32));
1024         /* just enable normal priority TX queue */
1025         AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1026                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1027                                 AT_DMA_LO_ADDR_MASK));
1028         AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1029                         (u32)(tpd_ring[atl1c_trans_high].dma &
1030                                 AT_DMA_LO_ADDR_MASK));
1031         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1032                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1033
1034
1035         /* RFD */
1036         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1037                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1038         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1039                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1040
1041         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1042                         rfd_ring->count & RFD_RING_SIZE_MASK);
1043         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1044                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1045
1046         /* RRD */
1047         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1048                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1049         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1050                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1051
1052         if (hw->nic_type == athr_l2c_b) {
1053                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1054                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1055                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1056                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1057                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1058                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1059                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1060                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1061         }
1062         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d_2) {
1063                         /* Power Saving for L2c_B */
1064                 AT_READ_REG(hw, REG_SERDES_LOCK, &data);
1065                 data |= SERDES_MAC_CLK_SLOWDOWN;
1066                 data |= SERDES_PYH_CLK_SLOWDOWN;
1067                 AT_WRITE_REG(hw, REG_SERDES_LOCK, data);
1068         }
1069         /* Load all of base address above */
1070         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1071 }
1072
1073 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1074 {
1075         struct atl1c_hw *hw = &adapter->hw;
1076         int max_pay_load;
1077         u16 tx_offload_thresh;
1078         u32 txq_ctrl_data;
1079
1080         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1081         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1082                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1083         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1084         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1085         /*
1086          * if BIOS had changed the dam-read-max-length to an invalid value,
1087          * restore it to default value
1088          */
1089         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1090                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1091                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1092         }
1093         txq_ctrl_data =
1094                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1095                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1096
1097         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1098 }
1099
1100 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1101 {
1102         struct atl1c_hw *hw = &adapter->hw;
1103         u32 rxq_ctrl_data;
1104
1105         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1106                         RXQ_RFD_BURST_NUM_SHIFT;
1107
1108         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1109                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1110
1111         /* aspm for gigabit */
1112         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1113                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1114                         ASPM_THRUPUT_LIMIT_100M);
1115
1116         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1117 }
1118
1119 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1120 {
1121         struct atl1c_hw *hw = &adapter->hw;
1122         u32 dma_ctrl_data;
1123
1124         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1125                 DMA_CTRL_RREQ_PRI_DATA |
1126                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1127                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1128                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1129
1130         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1131 }
1132
1133 /*
1134  * Stop the mac, transmit and receive units
1135  * hw - Struct containing variables accessed by shared code
1136  * return : 0  or  idle status (if error)
1137  */
1138 static int atl1c_stop_mac(struct atl1c_hw *hw)
1139 {
1140         u32 data;
1141
1142         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1143         data &= ~RXQ_CTRL_EN;
1144         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1145
1146         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1147         data &= ~TXQ_CTRL_EN;
1148         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1149
1150         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1151
1152         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1153         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1154         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1155
1156         return (int)atl1c_wait_until_idle(hw,
1157                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1158 }
1159
1160 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1161 {
1162         u32 data;
1163
1164         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1165         data |= RXQ_CTRL_EN;
1166         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1167 }
1168
1169 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1170 {
1171         u32 data;
1172
1173         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1174         data |= TXQ_CTRL_EN;
1175         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1176 }
1177
1178 /*
1179  * Reset the transmit and receive units; mask and clear all interrupts.
1180  * hw - Struct containing variables accessed by shared code
1181  * return : 0  or  idle status (if error)
1182  */
1183 static int atl1c_reset_mac(struct atl1c_hw *hw)
1184 {
1185         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1186         struct pci_dev *pdev = adapter->pdev;
1187         u32 master_ctrl_data = 0;
1188
1189         AT_WRITE_REG(hw, REG_IMR, 0);
1190         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1191
1192         atl1c_stop_mac(hw);
1193         /*
1194          * Issue Soft Reset to the MAC.  This will reset the chip's
1195          * transmit, receive, DMA.  It will not effect
1196          * the current PCI configuration.  The global reset bit is self-
1197          * clearing, and should clear within a microsecond.
1198          */
1199         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1200         master_ctrl_data |= MASTER_CTRL_OOB_DIS;
1201         AT_WRITE_REG(hw, REG_MASTER_CTRL,
1202                 master_ctrl_data | MASTER_CTRL_SOFT_RST);
1203
1204         AT_WRITE_FLUSH(hw);
1205         msleep(10);
1206         /* Wait at least 10ms for All module to be Idle */
1207
1208         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1209                 dev_err(&pdev->dev,
1210                         "MAC state machine can't be idle since"
1211                         " disabled for 10ms second\n");
1212                 return -1;
1213         }
1214         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1215
1216         return 0;
1217 }
1218
1219 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1220 {
1221         u16 ctrl_flags = hw->ctrl_flags;
1222
1223         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1224         atl1c_set_aspm(hw, SPEED_0);
1225         hw->ctrl_flags = ctrl_flags;
1226 }
1227
1228 /*
1229  * Set ASPM state.
1230  * Enable/disable L0s/L1 depend on link state.
1231  */
1232 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1233 {
1234         u32 pm_ctrl_data;
1235         u32 link_l1_timer;
1236
1237         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1238         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1239                           PM_CTRL_ASPM_L0S_EN |
1240                           PM_CTRL_MAC_ASPM_CHK);
1241         /* L1 timer */
1242         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1243                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1244                 link_l1_timer =
1245                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1246                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1247                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1248                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1249         } else {
1250                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1251                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1252                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1253                         link_l1_timer = 1;
1254                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1255                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1256         }
1257
1258         /* L0S/L1 enable */
1259         if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1260                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1261         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1262                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1263
1264         /* l2cb & l1d & l2cb2 & l1d2 */
1265         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1266             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1267                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1268                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1269                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1270                                 PM_CTRL_SERDES_PD_EX_L1 |
1271                                 PM_CTRL_CLK_SWH_L1;
1272                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1273                                   PM_CTRL_SERDES_PLL_L1_EN |
1274                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1275                                   PM_CTRL_SA_DLY_EN |
1276                                   PM_CTRL_HOTRST);
1277                 /* disable l0s if link down or l2cb */
1278                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1279                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1280         } else { /* l1c */
1281                 pm_ctrl_data =
1282                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1283                 if (link_speed != SPEED_0) {
1284                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1285                                         PM_CTRL_SERDES_PLL_L1_EN |
1286                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1287                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1288                                           PM_CTRL_CLK_SWH_L1 |
1289                                           PM_CTRL_ASPM_L0S_EN |
1290                                           PM_CTRL_ASPM_L1_EN);
1291                 } else { /* link down */
1292                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1293                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1294                                           PM_CTRL_SERDES_PLL_L1_EN |
1295                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1296                                           PM_CTRL_ASPM_L0S_EN);
1297                 }
1298         }
1299         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1300
1301         return;
1302 }
1303
1304 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1305 {
1306         struct atl1c_hw *hw = &adapter->hw;
1307         struct net_device *netdev = adapter->netdev;
1308         u32 mac_ctrl_data;
1309
1310         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1311         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1312
1313         if (adapter->link_duplex == FULL_DUPLEX) {
1314                 hw->mac_duplex = true;
1315                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1316         }
1317
1318         if (adapter->link_speed == SPEED_1000)
1319                 hw->mac_speed = atl1c_mac_speed_1000;
1320         else
1321                 hw->mac_speed = atl1c_mac_speed_10_100;
1322
1323         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1324                         MAC_CTRL_SPEED_SHIFT;
1325
1326         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1327         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1328                         MAC_CTRL_PRMLEN_SHIFT);
1329
1330         __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
1331
1332         mac_ctrl_data |= MAC_CTRL_BC_EN;
1333         if (netdev->flags & IFF_PROMISC)
1334                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1335         if (netdev->flags & IFF_ALLMULTI)
1336                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1337
1338         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1339         if (hw->nic_type == athr_l1d || hw->nic_type == athr_l2c_b2 ||
1340             hw->nic_type == athr_l1d_2) {
1341                 mac_ctrl_data |= MAC_CTRL_SPEED_MODE_SW;
1342                 mac_ctrl_data |= MAC_CTRL_HASH_ALG_CRC32;
1343         }
1344         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1345 }
1346
1347 /*
1348  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1349  * @adapter: board private structure
1350  *
1351  * Configure the Tx /Rx unit of the MAC after a reset.
1352  */
1353 static int atl1c_configure(struct atl1c_adapter *adapter)
1354 {
1355         struct atl1c_hw *hw = &adapter->hw;
1356         u32 master_ctrl_data = 0;
1357         u32 intr_modrt_data;
1358         u32 data;
1359
1360         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1361         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1362                               MASTER_CTRL_RX_ITIMER_EN |
1363                               MASTER_CTRL_INT_RDCLR);
1364         /* clear interrupt status */
1365         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1366         /*  Clear any WOL status */
1367         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1368         /* set Interrupt Clear Timer
1369          * HW will enable self to assert interrupt event to system after
1370          * waiting x-time for software to notify it accept interrupt.
1371          */
1372
1373         data = CLK_GATING_EN_ALL;
1374         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1375                 if (hw->nic_type == athr_l2c_b)
1376                         data &= ~CLK_GATING_RXMAC_EN;
1377         } else
1378                 data = 0;
1379         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1380
1381         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1382                 hw->ict & INT_RETRIG_TIMER_MASK);
1383
1384         atl1c_configure_des_ring(adapter);
1385
1386         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1387                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1388                                         IRQ_MODRT_TX_TIMER_SHIFT;
1389                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1390                                         IRQ_MODRT_RX_TIMER_SHIFT;
1391                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1392                 master_ctrl_data |=
1393                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1394         }
1395
1396         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1397                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1398
1399         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1400         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1401
1402         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1403                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1404
1405         /* set MTU */
1406         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1407                         VLAN_HLEN + ETH_FCS_LEN);
1408
1409         atl1c_configure_tx(adapter);
1410         atl1c_configure_rx(adapter);
1411         atl1c_configure_dma(adapter);
1412
1413         return 0;
1414 }
1415
1416 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1417 {
1418         u16 hw_reg_addr = 0;
1419         unsigned long *stats_item = NULL;
1420         u32 data;
1421
1422         /* update rx status */
1423         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1424         stats_item  = &adapter->hw_stats.rx_ok;
1425         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1426                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1427                 *stats_item += data;
1428                 stats_item++;
1429                 hw_reg_addr += 4;
1430         }
1431 /* update tx status */
1432         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1433         stats_item  = &adapter->hw_stats.tx_ok;
1434         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1435                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1436                 *stats_item += data;
1437                 stats_item++;
1438                 hw_reg_addr += 4;
1439         }
1440 }
1441
1442 /*
1443  * atl1c_get_stats - Get System Network Statistics
1444  * @netdev: network interface device structure
1445  *
1446  * Returns the address of the device statistics structure.
1447  * The statistics are actually updated from the timer callback.
1448  */
1449 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1450 {
1451         struct atl1c_adapter *adapter = netdev_priv(netdev);
1452         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1453         struct net_device_stats *net_stats = &netdev->stats;
1454
1455         atl1c_update_hw_stats(adapter);
1456         net_stats->rx_packets = hw_stats->rx_ok;
1457         net_stats->tx_packets = hw_stats->tx_ok;
1458         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1459         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1460         net_stats->multicast  = hw_stats->rx_mcast;
1461         net_stats->collisions = hw_stats->tx_1_col +
1462                                 hw_stats->tx_2_col * 2 +
1463                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1464         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1465                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1466                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1467         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1468         net_stats->rx_length_errors = hw_stats->rx_len_err;
1469         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1470         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1471         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1472
1473         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1474
1475         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1476                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1477         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1478         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1479         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1480
1481         return net_stats;
1482 }
1483
1484 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1485 {
1486         u16 phy_data;
1487
1488         spin_lock(&adapter->mdio_lock);
1489         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1490         spin_unlock(&adapter->mdio_lock);
1491 }
1492
1493 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1494                                 enum atl1c_trans_queue type)
1495 {
1496         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1497                                 &adapter->tpd_ring[type];
1498         struct atl1c_buffer *buffer_info;
1499         struct pci_dev *pdev = adapter->pdev;
1500         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1501         u16 hw_next_to_clean;
1502         u16 reg;
1503
1504         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1505
1506         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1507
1508         while (next_to_clean != hw_next_to_clean) {
1509                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1510                 atl1c_clean_buffer(pdev, buffer_info, 1);
1511                 if (++next_to_clean == tpd_ring->count)
1512                         next_to_clean = 0;
1513                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1514         }
1515
1516         if (netif_queue_stopped(adapter->netdev) &&
1517                         netif_carrier_ok(adapter->netdev)) {
1518                 netif_wake_queue(adapter->netdev);
1519         }
1520
1521         return true;
1522 }
1523
1524 /*
1525  * atl1c_intr - Interrupt Handler
1526  * @irq: interrupt number
1527  * @data: pointer to a network interface device structure
1528  * @pt_regs: CPU registers structure
1529  */
1530 static irqreturn_t atl1c_intr(int irq, void *data)
1531 {
1532         struct net_device *netdev  = data;
1533         struct atl1c_adapter *adapter = netdev_priv(netdev);
1534         struct pci_dev *pdev = adapter->pdev;
1535         struct atl1c_hw *hw = &adapter->hw;
1536         int max_ints = AT_MAX_INT_WORK;
1537         int handled = IRQ_NONE;
1538         u32 status;
1539         u32 reg_data;
1540
1541         do {
1542                 AT_READ_REG(hw, REG_ISR, &reg_data);
1543                 status = reg_data & hw->intr_mask;
1544
1545                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1546                         if (max_ints != AT_MAX_INT_WORK)
1547                                 handled = IRQ_HANDLED;
1548                         break;
1549                 }
1550                 /* link event */
1551                 if (status & ISR_GPHY)
1552                         atl1c_clear_phy_int(adapter);
1553                 /* Ack ISR */
1554                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1555                 if (status & ISR_RX_PKT) {
1556                         if (likely(napi_schedule_prep(&adapter->napi))) {
1557                                 hw->intr_mask &= ~ISR_RX_PKT;
1558                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1559                                 __napi_schedule(&adapter->napi);
1560                         }
1561                 }
1562                 if (status & ISR_TX_PKT)
1563                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1564
1565                 handled = IRQ_HANDLED;
1566                 /* check if PCIE PHY Link down */
1567                 if (status & ISR_ERROR) {
1568                         if (netif_msg_hw(adapter))
1569                                 dev_err(&pdev->dev,
1570                                         "atl1c hardware error (status = 0x%x)\n",
1571                                         status & ISR_ERROR);
1572                         /* reset MAC */
1573                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1574                         schedule_work(&adapter->common_task);
1575                         return IRQ_HANDLED;
1576                 }
1577
1578                 if (status & ISR_OVER)
1579                         if (netif_msg_intr(adapter))
1580                                 dev_warn(&pdev->dev,
1581                                         "TX/RX overflow (status = 0x%x)\n",
1582                                         status & ISR_OVER);
1583
1584                 /* link event */
1585                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1586                         netdev->stats.tx_carrier_errors++;
1587                         atl1c_link_chg_event(adapter);
1588                         break;
1589                 }
1590
1591         } while (--max_ints > 0);
1592         /* re-enable Interrupt*/
1593         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1594         return handled;
1595 }
1596
1597 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1598                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1599 {
1600         /*
1601          * The pid field in RRS in not correct sometimes, so we
1602          * cannot figure out if the packet is fragmented or not,
1603          * so we tell the KERNEL CHECKSUM_NONE
1604          */
1605         skb_checksum_none_assert(skb);
1606 }
1607
1608 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1609 {
1610         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1611         struct pci_dev *pdev = adapter->pdev;
1612         struct atl1c_buffer *buffer_info, *next_info;
1613         struct sk_buff *skb;
1614         void *vir_addr = NULL;
1615         u16 num_alloc = 0;
1616         u16 rfd_next_to_use, next_next;
1617         struct atl1c_rx_free_desc *rfd_desc;
1618
1619         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1620         if (++next_next == rfd_ring->count)
1621                 next_next = 0;
1622         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1623         next_info = &rfd_ring->buffer_info[next_next];
1624
1625         while (next_info->flags & ATL1C_BUFFER_FREE) {
1626                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1627
1628                 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len);
1629                 if (unlikely(!skb)) {
1630                         if (netif_msg_rx_err(adapter))
1631                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1632                         break;
1633                 }
1634
1635                 /*
1636                  * Make buffer alignment 2 beyond a 16 byte boundary
1637                  * this will result in a 16 byte aligned IP header after
1638                  * the 14 byte MAC header is removed
1639                  */
1640                 vir_addr = skb->data;
1641                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1642                 buffer_info->skb = skb;
1643                 buffer_info->length = adapter->rx_buffer_len;
1644                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1645                                                 buffer_info->length,
1646                                                 PCI_DMA_FROMDEVICE);
1647                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1648                         ATL1C_PCIMAP_FROMDEVICE);
1649                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1650                 rfd_next_to_use = next_next;
1651                 if (++next_next == rfd_ring->count)
1652                         next_next = 0;
1653                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1654                 next_info = &rfd_ring->buffer_info[next_next];
1655                 num_alloc++;
1656         }
1657
1658         if (num_alloc) {
1659                 /* TODO: update mailbox here */
1660                 wmb();
1661                 rfd_ring->next_to_use = rfd_next_to_use;
1662                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1663                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1664         }
1665
1666         return num_alloc;
1667 }
1668
1669 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1670                         struct  atl1c_recv_ret_status *rrs, u16 num)
1671 {
1672         u16 i;
1673         /* the relationship between rrd and rfd is one map one */
1674         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1675                                         rrd_ring->next_to_clean)) {
1676                 rrs->word3 &= ~RRS_RXD_UPDATED;
1677                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1678                         rrd_ring->next_to_clean = 0;
1679         }
1680 }
1681
1682 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1683         struct atl1c_recv_ret_status *rrs, u16 num)
1684 {
1685         u16 i;
1686         u16 rfd_index;
1687         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1688
1689         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1690                         RRS_RX_RFD_INDEX_MASK;
1691         for (i = 0; i < num; i++) {
1692                 buffer_info[rfd_index].skb = NULL;
1693                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1694                                         ATL1C_BUFFER_FREE);
1695                 if (++rfd_index == rfd_ring->count)
1696                         rfd_index = 0;
1697         }
1698         rfd_ring->next_to_clean = rfd_index;
1699 }
1700
1701 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1702                    int *work_done, int work_to_do)
1703 {
1704         u16 rfd_num, rfd_index;
1705         u16 count = 0;
1706         u16 length;
1707         struct pci_dev *pdev = adapter->pdev;
1708         struct net_device *netdev  = adapter->netdev;
1709         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1710         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1711         struct sk_buff *skb;
1712         struct atl1c_recv_ret_status *rrs;
1713         struct atl1c_buffer *buffer_info;
1714
1715         while (1) {
1716                 if (*work_done >= work_to_do)
1717                         break;
1718                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1719                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1720                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1721                                 RRS_RX_RFD_CNT_MASK;
1722                         if (unlikely(rfd_num != 1))
1723                                 /* TODO support mul rfd*/
1724                                 if (netif_msg_rx_err(adapter))
1725                                         dev_warn(&pdev->dev,
1726                                                 "Multi rfd not support yet!\n");
1727                         goto rrs_checked;
1728                 } else {
1729                         break;
1730                 }
1731 rrs_checked:
1732                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1733                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1734                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1735                                 if (netif_msg_rx_err(adapter))
1736                                         dev_warn(&pdev->dev,
1737                                                 "wrong packet! rrs word3 is %x\n",
1738                                                 rrs->word3);
1739                         continue;
1740                 }
1741
1742                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1743                                 RRS_PKT_SIZE_MASK);
1744                 /* Good Receive */
1745                 if (likely(rfd_num == 1)) {
1746                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1747                                         RRS_RX_RFD_INDEX_MASK;
1748                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1749                         pci_unmap_single(pdev, buffer_info->dma,
1750                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1751                         skb = buffer_info->skb;
1752                 } else {
1753                         /* TODO */
1754                         if (netif_msg_rx_err(adapter))
1755                                 dev_warn(&pdev->dev,
1756                                         "Multi rfd not support yet!\n");
1757                         break;
1758                 }
1759                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1760                 skb_put(skb, length - ETH_FCS_LEN);
1761                 skb->protocol = eth_type_trans(skb, netdev);
1762                 atl1c_rx_checksum(adapter, skb, rrs);
1763                 if (rrs->word3 & RRS_VLAN_INS) {
1764                         u16 vlan;
1765
1766                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1767                         vlan = le16_to_cpu(vlan);
1768                         __vlan_hwaccel_put_tag(skb, vlan);
1769                 }
1770                 netif_receive_skb(skb);
1771
1772                 (*work_done)++;
1773                 count++;
1774         }
1775         if (count)
1776                 atl1c_alloc_rx_buffer(adapter);
1777 }
1778
1779 /*
1780  * atl1c_clean - NAPI Rx polling callback
1781  * @adapter: board private structure
1782  */
1783 static int atl1c_clean(struct napi_struct *napi, int budget)
1784 {
1785         struct atl1c_adapter *adapter =
1786                         container_of(napi, struct atl1c_adapter, napi);
1787         int work_done = 0;
1788
1789         /* Keep link state information with original netdev */
1790         if (!netif_carrier_ok(adapter->netdev))
1791                 goto quit_polling;
1792         /* just enable one RXQ */
1793         atl1c_clean_rx_irq(adapter, &work_done, budget);
1794
1795         if (work_done < budget) {
1796 quit_polling:
1797                 napi_complete(napi);
1798                 adapter->hw.intr_mask |= ISR_RX_PKT;
1799                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1800         }
1801         return work_done;
1802 }
1803
1804 #ifdef CONFIG_NET_POLL_CONTROLLER
1805
1806 /*
1807  * Polling 'interrupt' - used by things like netconsole to send skbs
1808  * without having to re-enable interrupts. It's not called while
1809  * the interrupt routine is executing.
1810  */
1811 static void atl1c_netpoll(struct net_device *netdev)
1812 {
1813         struct atl1c_adapter *adapter = netdev_priv(netdev);
1814
1815         disable_irq(adapter->pdev->irq);
1816         atl1c_intr(adapter->pdev->irq, netdev);
1817         enable_irq(adapter->pdev->irq);
1818 }
1819 #endif
1820
1821 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1822 {
1823         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1824         u16 next_to_use = 0;
1825         u16 next_to_clean = 0;
1826
1827         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1828         next_to_use   = tpd_ring->next_to_use;
1829
1830         return (u16)(next_to_clean > next_to_use) ?
1831                 (next_to_clean - next_to_use - 1) :
1832                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1833 }
1834
1835 /*
1836  * get next usable tpd
1837  * Note: should call atl1c_tdp_avail to make sure
1838  * there is enough tpd to use
1839  */
1840 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1841         enum atl1c_trans_queue type)
1842 {
1843         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1844         struct atl1c_tpd_desc *tpd_desc;
1845         u16 next_to_use = 0;
1846
1847         next_to_use = tpd_ring->next_to_use;
1848         if (++tpd_ring->next_to_use == tpd_ring->count)
1849                 tpd_ring->next_to_use = 0;
1850         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1851         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1852         return  tpd_desc;
1853 }
1854
1855 static struct atl1c_buffer *
1856 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1857 {
1858         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1859
1860         return &tpd_ring->buffer_info[tpd -
1861                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1862 }
1863
1864 /* Calculate the transmit packet descript needed*/
1865 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1866 {
1867         u16 tpd_req;
1868         u16 proto_hdr_len = 0;
1869
1870         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1871
1872         if (skb_is_gso(skb)) {
1873                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1874                 if (proto_hdr_len < skb_headlen(skb))
1875                         tpd_req++;
1876                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1877                         tpd_req++;
1878         }
1879         return tpd_req;
1880 }
1881
1882 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1883                           struct sk_buff *skb,
1884                           struct atl1c_tpd_desc **tpd,
1885                           enum atl1c_trans_queue type)
1886 {
1887         struct pci_dev *pdev = adapter->pdev;
1888         u8 hdr_len;
1889         u32 real_len;
1890         unsigned short offload_type;
1891         int err;
1892
1893         if (skb_is_gso(skb)) {
1894                 if (skb_header_cloned(skb)) {
1895                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1896                         if (unlikely(err))
1897                                 return -1;
1898                 }
1899                 offload_type = skb_shinfo(skb)->gso_type;
1900
1901                 if (offload_type & SKB_GSO_TCPV4) {
1902                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1903                                         + ntohs(ip_hdr(skb)->tot_len));
1904
1905                         if (real_len < skb->len)
1906                                 pskb_trim(skb, real_len);
1907
1908                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1909                         if (unlikely(skb->len == hdr_len)) {
1910                                 /* only xsum need */
1911                                 if (netif_msg_tx_queued(adapter))
1912                                         dev_warn(&pdev->dev,
1913                                                 "IPV4 tso with zero data??\n");
1914                                 goto check_sum;
1915                         } else {
1916                                 ip_hdr(skb)->check = 0;
1917                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1918                                                         ip_hdr(skb)->saddr,
1919                                                         ip_hdr(skb)->daddr,
1920                                                         0, IPPROTO_TCP, 0);
1921                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1922                         }
1923                 }
1924
1925                 if (offload_type & SKB_GSO_TCPV6) {
1926                         struct atl1c_tpd_ext_desc *etpd =
1927                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1928
1929                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1930                         *tpd = atl1c_get_tpd(adapter, type);
1931                         ipv6_hdr(skb)->payload_len = 0;
1932                         /* check payload == 0 byte ? */
1933                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1934                         if (unlikely(skb->len == hdr_len)) {
1935                                 /* only xsum need */
1936                                 if (netif_msg_tx_queued(adapter))
1937                                         dev_warn(&pdev->dev,
1938                                                 "IPV6 tso with zero data??\n");
1939                                 goto check_sum;
1940                         } else
1941                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1942                                                 &ipv6_hdr(skb)->saddr,
1943                                                 &ipv6_hdr(skb)->daddr,
1944                                                 0, IPPROTO_TCP, 0);
1945                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1946                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1947                         etpd->pkt_len = cpu_to_le32(skb->len);
1948                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1949                 }
1950
1951                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1952                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1953                                 TPD_TCPHDR_OFFSET_SHIFT;
1954                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1955                                 TPD_MSS_SHIFT;
1956                 return 0;
1957         }
1958
1959 check_sum:
1960         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1961                 u8 css, cso;
1962                 cso = skb_checksum_start_offset(skb);
1963
1964                 if (unlikely(cso & 0x1)) {
1965                         if (netif_msg_tx_err(adapter))
1966                                 dev_err(&adapter->pdev->dev,
1967                                         "payload offset should not an event number\n");
1968                         return -1;
1969                 } else {
1970                         css = cso + skb->csum_offset;
1971
1972                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1973                                         TPD_PLOADOFFSET_SHIFT;
1974                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1975                                         TPD_CCSUM_OFFSET_SHIFT;
1976                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1977                 }
1978         }
1979         return 0;
1980 }
1981
1982 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1983                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1984                         enum atl1c_trans_queue type)
1985 {
1986         struct atl1c_tpd_desc *use_tpd = NULL;
1987         struct atl1c_buffer *buffer_info = NULL;
1988         u16 buf_len = skb_headlen(skb);
1989         u16 map_len = 0;
1990         u16 mapped_len = 0;
1991         u16 hdr_len = 0;
1992         u16 nr_frags;
1993         u16 f;
1994         int tso;
1995
1996         nr_frags = skb_shinfo(skb)->nr_frags;
1997         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
1998         if (tso) {
1999                 /* TSO */
2000                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2001                 use_tpd = tpd;
2002
2003                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2004                 buffer_info->length = map_len;
2005                 buffer_info->dma = pci_map_single(adapter->pdev,
2006                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2007                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2008                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2009                         ATL1C_PCIMAP_TODEVICE);
2010                 mapped_len += map_len;
2011                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2012                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2013         }
2014
2015         if (mapped_len < buf_len) {
2016                 /* mapped_len == 0, means we should use the first tpd,
2017                    which is given by caller  */
2018                 if (mapped_len == 0)
2019                         use_tpd = tpd;
2020                 else {
2021                         use_tpd = atl1c_get_tpd(adapter, type);
2022                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2023                 }
2024                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2025                 buffer_info->length = buf_len - mapped_len;
2026                 buffer_info->dma =
2027                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2028                                         buffer_info->length, PCI_DMA_TODEVICE);
2029                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2030                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2031                         ATL1C_PCIMAP_TODEVICE);
2032                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2033                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2034         }
2035
2036         for (f = 0; f < nr_frags; f++) {
2037                 struct skb_frag_struct *frag;
2038
2039                 frag = &skb_shinfo(skb)->frags[f];
2040
2041                 use_tpd = atl1c_get_tpd(adapter, type);
2042                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2043
2044                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2045                 buffer_info->length = skb_frag_size(frag);
2046                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2047                                                     frag, 0,
2048                                                     buffer_info->length,
2049                                                     DMA_TO_DEVICE);
2050                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2051                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2052                         ATL1C_PCIMAP_TODEVICE);
2053                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2054                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2055         }
2056
2057         /* The last tpd */
2058         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2059         /* The last buffer info contain the skb address,
2060            so it will be free after unmap */
2061         buffer_info->skb = skb;
2062 }
2063
2064 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2065                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2066 {
2067         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2068         u16 reg;
2069
2070         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2071         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2072 }
2073
2074 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2075                                           struct net_device *netdev)
2076 {
2077         struct atl1c_adapter *adapter = netdev_priv(netdev);
2078         unsigned long flags;
2079         u16 tpd_req = 1;
2080         struct atl1c_tpd_desc *tpd;
2081         enum atl1c_trans_queue type = atl1c_trans_normal;
2082
2083         if (test_bit(__AT_DOWN, &adapter->flags)) {
2084                 dev_kfree_skb_any(skb);
2085                 return NETDEV_TX_OK;
2086         }
2087
2088         tpd_req = atl1c_cal_tpd_req(skb);
2089         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2090                 if (netif_msg_pktdata(adapter))
2091                         dev_info(&adapter->pdev->dev, "tx locked\n");
2092                 return NETDEV_TX_LOCKED;
2093         }
2094
2095         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2096                 /* no enough descriptor, just stop queue */
2097                 netif_stop_queue(netdev);
2098                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2099                 return NETDEV_TX_BUSY;
2100         }
2101
2102         tpd = atl1c_get_tpd(adapter, type);
2103
2104         /* do TSO and check sum */
2105         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2106                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2107                 dev_kfree_skb_any(skb);
2108                 return NETDEV_TX_OK;
2109         }
2110
2111         if (unlikely(vlan_tx_tag_present(skb))) {
2112                 u16 vlan = vlan_tx_tag_get(skb);
2113                 __le16 tag;
2114
2115                 vlan = cpu_to_le16(vlan);
2116                 AT_VLAN_TO_TAG(vlan, tag);
2117                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2118                 tpd->vlan_tag = tag;
2119         }
2120
2121         if (skb_network_offset(skb) != ETH_HLEN)
2122                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2123
2124         atl1c_tx_map(adapter, skb, tpd, type);
2125         atl1c_tx_queue(adapter, skb, tpd, type);
2126
2127         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2128         return NETDEV_TX_OK;
2129 }
2130
2131 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2132 {
2133         struct net_device *netdev = adapter->netdev;
2134
2135         free_irq(adapter->pdev->irq, netdev);
2136
2137         if (adapter->have_msi)
2138                 pci_disable_msi(adapter->pdev);
2139 }
2140
2141 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2142 {
2143         struct pci_dev    *pdev   = adapter->pdev;
2144         struct net_device *netdev = adapter->netdev;
2145         int flags = 0;
2146         int err = 0;
2147
2148         adapter->have_msi = true;
2149         err = pci_enable_msi(adapter->pdev);
2150         if (err) {
2151                 if (netif_msg_ifup(adapter))
2152                         dev_err(&pdev->dev,
2153                                 "Unable to allocate MSI interrupt Error: %d\n",
2154                                 err);
2155                 adapter->have_msi = false;
2156         }
2157
2158         if (!adapter->have_msi)
2159                 flags |= IRQF_SHARED;
2160         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2161                         netdev->name, netdev);
2162         if (err) {
2163                 if (netif_msg_ifup(adapter))
2164                         dev_err(&pdev->dev,
2165                                 "Unable to allocate interrupt Error: %d\n",
2166                                 err);
2167                 if (adapter->have_msi)
2168                         pci_disable_msi(adapter->pdev);
2169                 return err;
2170         }
2171         if (netif_msg_ifup(adapter))
2172                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2173         return err;
2174 }
2175
2176 static int atl1c_up(struct atl1c_adapter *adapter)
2177 {
2178         struct net_device *netdev = adapter->netdev;
2179         int num;
2180         int err;
2181
2182         netif_carrier_off(netdev);
2183         atl1c_init_ring_ptrs(adapter);
2184         atl1c_set_multi(netdev);
2185         atl1c_restore_vlan(adapter);
2186
2187         num = atl1c_alloc_rx_buffer(adapter);
2188         if (unlikely(num == 0)) {
2189                 err = -ENOMEM;
2190                 goto err_alloc_rx;
2191         }
2192
2193         if (atl1c_configure(adapter)) {
2194                 err = -EIO;
2195                 goto err_up;
2196         }
2197
2198         err = atl1c_request_irq(adapter);
2199         if (unlikely(err))
2200                 goto err_up;
2201
2202         clear_bit(__AT_DOWN, &adapter->flags);
2203         napi_enable(&adapter->napi);
2204         atl1c_irq_enable(adapter);
2205         atl1c_check_link_status(adapter);
2206         netif_start_queue(netdev);
2207         return err;
2208
2209 err_up:
2210 err_alloc_rx:
2211         atl1c_clean_rx_ring(adapter);
2212         return err;
2213 }
2214
2215 static void atl1c_down(struct atl1c_adapter *adapter)
2216 {
2217         struct net_device *netdev = adapter->netdev;
2218
2219         atl1c_del_timer(adapter);
2220         adapter->work_event = 0; /* clear all event */
2221         /* signal that we're down so the interrupt handler does not
2222          * reschedule our watchdog timer */
2223         set_bit(__AT_DOWN, &adapter->flags);
2224         netif_carrier_off(netdev);
2225         napi_disable(&adapter->napi);
2226         atl1c_irq_disable(adapter);
2227         atl1c_free_irq(adapter);
2228         /* disable ASPM if device inactive */
2229         atl1c_disable_l0s_l1(&adapter->hw);
2230         /* reset MAC to disable all RX/TX */
2231         atl1c_reset_mac(&adapter->hw);
2232         msleep(1);
2233
2234         adapter->link_speed = SPEED_0;
2235         adapter->link_duplex = -1;
2236         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2237         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2238         atl1c_clean_rx_ring(adapter);
2239 }
2240
2241 /*
2242  * atl1c_open - Called when a network interface is made active
2243  * @netdev: network interface device structure
2244  *
2245  * Returns 0 on success, negative value on failure
2246  *
2247  * The open entry point is called when a network interface is made
2248  * active by the system (IFF_UP).  At this point all resources needed
2249  * for transmit and receive operations are allocated, the interrupt
2250  * handler is registered with the OS, the watchdog timer is started,
2251  * and the stack is notified that the interface is ready.
2252  */
2253 static int atl1c_open(struct net_device *netdev)
2254 {
2255         struct atl1c_adapter *adapter = netdev_priv(netdev);
2256         int err;
2257
2258         /* disallow open during test */
2259         if (test_bit(__AT_TESTING, &adapter->flags))
2260                 return -EBUSY;
2261
2262         /* allocate rx/tx dma buffer & descriptors */
2263         err = atl1c_setup_ring_resources(adapter);
2264         if (unlikely(err))
2265                 return err;
2266
2267         err = atl1c_up(adapter);
2268         if (unlikely(err))
2269                 goto err_up;
2270
2271         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2272                 u32 phy_data;
2273
2274                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2275                 phy_data |= MDIO_AP_EN;
2276                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2277         }
2278         return 0;
2279
2280 err_up:
2281         atl1c_free_irq(adapter);
2282         atl1c_free_ring_resources(adapter);
2283         atl1c_reset_mac(&adapter->hw);
2284         return err;
2285 }
2286
2287 /*
2288  * atl1c_close - Disables a network interface
2289  * @netdev: network interface device structure
2290  *
2291  * Returns 0, this is not allowed to fail
2292  *
2293  * The close entry point is called when an interface is de-activated
2294  * by the OS.  The hardware is still under the drivers control, but
2295  * needs to be disabled.  A global MAC reset is issued to stop the
2296  * hardware, and all transmit and receive resources are freed.
2297  */
2298 static int atl1c_close(struct net_device *netdev)
2299 {
2300         struct atl1c_adapter *adapter = netdev_priv(netdev);
2301
2302         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2303         atl1c_down(adapter);
2304         atl1c_free_ring_resources(adapter);
2305         return 0;
2306 }
2307
2308 static int atl1c_suspend(struct device *dev)
2309 {
2310         struct pci_dev *pdev = to_pci_dev(dev);
2311         struct net_device *netdev = pci_get_drvdata(pdev);
2312         struct atl1c_adapter *adapter = netdev_priv(netdev);
2313         struct atl1c_hw *hw = &adapter->hw;
2314         u32 mac_ctrl_data = 0;
2315         u32 master_ctrl_data = 0;
2316         u32 wol_ctrl_data = 0;
2317         u16 mii_intr_status_data = 0;
2318         u32 wufc = adapter->wol;
2319
2320         atl1c_disable_l0s_l1(hw);
2321         if (netif_running(netdev)) {
2322                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2323                 atl1c_down(adapter);
2324         }
2325         netif_device_detach(netdev);
2326
2327         if (wufc)
2328                 if (atl1c_phy_power_saving(hw) != 0)
2329                         dev_dbg(&pdev->dev, "phy power saving failed");
2330
2331         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2332         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
2333
2334         master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2335         mac_ctrl_data &= ~(MAC_CTRL_PRMLEN_MASK << MAC_CTRL_PRMLEN_SHIFT);
2336         mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2337                         MAC_CTRL_PRMLEN_MASK) <<
2338                         MAC_CTRL_PRMLEN_SHIFT);
2339         mac_ctrl_data &= ~(MAC_CTRL_SPEED_MASK << MAC_CTRL_SPEED_SHIFT);
2340         mac_ctrl_data &= ~MAC_CTRL_DUPLX;
2341
2342         if (wufc) {
2343                 mac_ctrl_data |= MAC_CTRL_RX_EN;
2344                 if (adapter->link_speed == SPEED_1000 ||
2345                         adapter->link_speed == SPEED_0) {
2346                         mac_ctrl_data |= atl1c_mac_speed_1000 <<
2347                                         MAC_CTRL_SPEED_SHIFT;
2348                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2349                 } else
2350                         mac_ctrl_data |= atl1c_mac_speed_10_100 <<
2351                                         MAC_CTRL_SPEED_SHIFT;
2352
2353                 if (adapter->link_duplex == DUPLEX_FULL)
2354                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2355
2356                 /* turn on magic packet wol */
2357                 if (wufc & AT_WUFC_MAG)
2358                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2359
2360                 if (wufc & AT_WUFC_LNKC) {
2361                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2362                         /* only link up can wake up */
2363                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2364                                 dev_dbg(&pdev->dev, "%s: read write phy "
2365                                                   "register failed.\n",
2366                                                   atl1c_driver_name);
2367                         }
2368                 }
2369                 /* clear phy interrupt */
2370                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2371                 /* Config MAC Ctrl register */
2372                 __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
2373
2374                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2375                 if (wufc & AT_WUFC_MAG)
2376                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2377
2378                 dev_dbg(&pdev->dev,
2379                         "%s: suspend MAC=0x%x\n",
2380                         atl1c_driver_name, mac_ctrl_data);
2381                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2382                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2383                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2384
2385                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
2386                         GPHY_CTRL_EXT_RESET);
2387         } else {
2388                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_POWER_SAVING);
2389                 master_ctrl_data |= MASTER_CTRL_CLK_SEL_DIS;
2390                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2391                 mac_ctrl_data |= MAC_CTRL_DUPLX;
2392                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2393                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2394                 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2395                 hw->phy_configured = false; /* re-init PHY when resume */
2396         }
2397
2398         return 0;
2399 }
2400
2401 #ifdef CONFIG_PM_SLEEP
2402 static int atl1c_resume(struct device *dev)
2403 {
2404         struct pci_dev *pdev = to_pci_dev(dev);
2405         struct net_device *netdev = pci_get_drvdata(pdev);
2406         struct atl1c_adapter *adapter = netdev_priv(netdev);
2407
2408         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2409         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2410                         ATL1C_PCIE_PHY_RESET);
2411
2412         atl1c_phy_reset(&adapter->hw);
2413         atl1c_reset_mac(&adapter->hw);
2414         atl1c_phy_init(&adapter->hw);
2415
2416 #if 0
2417         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2418         pm_data &= ~PM_CTRLSTAT_PME_EN;
2419         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2420 #endif
2421
2422         netif_device_attach(netdev);
2423         if (netif_running(netdev))
2424                 atl1c_up(adapter);
2425
2426         return 0;
2427 }
2428 #endif
2429
2430 static void atl1c_shutdown(struct pci_dev *pdev)
2431 {
2432         struct net_device *netdev = pci_get_drvdata(pdev);
2433         struct atl1c_adapter *adapter = netdev_priv(netdev);
2434
2435         atl1c_suspend(&pdev->dev);
2436         pci_wake_from_d3(pdev, adapter->wol);
2437         pci_set_power_state(pdev, PCI_D3hot);
2438 }
2439
2440 static const struct net_device_ops atl1c_netdev_ops = {
2441         .ndo_open               = atl1c_open,
2442         .ndo_stop               = atl1c_close,
2443         .ndo_validate_addr      = eth_validate_addr,
2444         .ndo_start_xmit         = atl1c_xmit_frame,
2445         .ndo_set_mac_address    = atl1c_set_mac_addr,
2446         .ndo_set_rx_mode        = atl1c_set_multi,
2447         .ndo_change_mtu         = atl1c_change_mtu,
2448         .ndo_fix_features       = atl1c_fix_features,
2449         .ndo_set_features       = atl1c_set_features,
2450         .ndo_do_ioctl           = atl1c_ioctl,
2451         .ndo_tx_timeout         = atl1c_tx_timeout,
2452         .ndo_get_stats          = atl1c_get_stats,
2453 #ifdef CONFIG_NET_POLL_CONTROLLER
2454         .ndo_poll_controller    = atl1c_netpoll,
2455 #endif
2456 };
2457
2458 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2459 {
2460         SET_NETDEV_DEV(netdev, &pdev->dev);
2461         pci_set_drvdata(pdev, netdev);
2462
2463         netdev->netdev_ops = &atl1c_netdev_ops;
2464         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2465         atl1c_set_ethtool_ops(netdev);
2466
2467         /* TODO: add when ready */
2468         netdev->hw_features =   NETIF_F_SG         |
2469                                 NETIF_F_HW_CSUM    |
2470                                 NETIF_F_HW_VLAN_RX |
2471                                 NETIF_F_TSO        |
2472                                 NETIF_F_TSO6;
2473         netdev->features =      netdev->hw_features |
2474                                 NETIF_F_HW_VLAN_TX;
2475         return 0;
2476 }
2477
2478 /*
2479  * atl1c_probe - Device Initialization Routine
2480  * @pdev: PCI device information struct
2481  * @ent: entry in atl1c_pci_tbl
2482  *
2483  * Returns 0 on success, negative on failure
2484  *
2485  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2486  * The OS initialization, configuring of the adapter private structure,
2487  * and a hardware reset occur.
2488  */
2489 static int __devinit atl1c_probe(struct pci_dev *pdev,
2490                                  const struct pci_device_id *ent)
2491 {
2492         struct net_device *netdev;
2493         struct atl1c_adapter *adapter;
2494         static int cards_found;
2495
2496         int err = 0;
2497
2498         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2499         err = pci_enable_device_mem(pdev);
2500         if (err) {
2501                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2502                 return err;
2503         }
2504
2505         /*
2506          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2507          * shared register for the high 32 bits, so only a single, aligned,
2508          * 4 GB physical address range can be used at a time.
2509          *
2510          * Supporting 64-bit DMA on this hardware is more trouble than it's
2511          * worth.  It is far easier to limit to 32-bit DMA than update
2512          * various kernel subsystems to support the mechanics required by a
2513          * fixed-high-32-bit system.
2514          */
2515         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2516             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2517                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2518                 goto err_dma;
2519         }
2520
2521         err = pci_request_regions(pdev, atl1c_driver_name);
2522         if (err) {
2523                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2524                 goto err_pci_reg;
2525         }
2526
2527         pci_set_master(pdev);
2528
2529         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2530         if (netdev == NULL) {
2531                 err = -ENOMEM;
2532                 goto err_alloc_etherdev;
2533         }
2534
2535         err = atl1c_init_netdev(netdev, pdev);
2536         if (err) {
2537                 dev_err(&pdev->dev, "init netdevice failed\n");
2538                 goto err_init_netdev;
2539         }
2540         adapter = netdev_priv(netdev);
2541         adapter->bd_number = cards_found;
2542         adapter->netdev = netdev;
2543         adapter->pdev = pdev;
2544         adapter->hw.adapter = adapter;
2545         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2546         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2547         if (!adapter->hw.hw_addr) {
2548                 err = -EIO;
2549                 dev_err(&pdev->dev, "cannot map device registers\n");
2550                 goto err_ioremap;
2551         }
2552
2553         /* init mii data */
2554         adapter->mii.dev = netdev;
2555         adapter->mii.mdio_read  = atl1c_mdio_read;
2556         adapter->mii.mdio_write = atl1c_mdio_write;
2557         adapter->mii.phy_id_mask = 0x1f;
2558         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2559         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2560         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2561                         (unsigned long)adapter);
2562         /* setup the private structure */
2563         err = atl1c_sw_init(adapter);
2564         if (err) {
2565                 dev_err(&pdev->dev, "net device private data init failed\n");
2566                 goto err_sw_init;
2567         }
2568         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2569                         ATL1C_PCIE_PHY_RESET);
2570
2571         /* Init GPHY as early as possible due to power saving issue  */
2572         atl1c_phy_reset(&adapter->hw);
2573
2574         err = atl1c_reset_mac(&adapter->hw);
2575         if (err) {
2576                 err = -EIO;
2577                 goto err_reset;
2578         }
2579
2580         /* reset the controller to
2581          * put the device in a known good starting state */
2582         err = atl1c_phy_init(&adapter->hw);
2583         if (err) {
2584                 err = -EIO;
2585                 goto err_reset;
2586         }
2587         if (atl1c_read_mac_addr(&adapter->hw)) {
2588                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2589                 netdev->addr_assign_type |= NET_ADDR_RANDOM;
2590         }
2591         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2592         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2593         if (netif_msg_probe(adapter))
2594                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2595                         adapter->hw.mac_addr);
2596
2597         atl1c_hw_set_mac_addr(&adapter->hw);
2598         INIT_WORK(&adapter->common_task, atl1c_common_task);
2599         adapter->work_event = 0;
2600         err = register_netdev(netdev);
2601         if (err) {
2602                 dev_err(&pdev->dev, "register netdevice failed\n");
2603                 goto err_register;
2604         }
2605
2606         if (netif_msg_probe(adapter))
2607                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2608         cards_found++;
2609         return 0;
2610
2611 err_reset:
2612 err_register:
2613 err_sw_init:
2614         iounmap(adapter->hw.hw_addr);
2615 err_init_netdev:
2616 err_ioremap:
2617         free_netdev(netdev);
2618 err_alloc_etherdev:
2619         pci_release_regions(pdev);
2620 err_pci_reg:
2621 err_dma:
2622         pci_disable_device(pdev);
2623         return err;
2624 }
2625
2626 /*
2627  * atl1c_remove - Device Removal Routine
2628  * @pdev: PCI device information struct
2629  *
2630  * atl1c_remove is called by the PCI subsystem to alert the driver
2631  * that it should release a PCI device.  The could be caused by a
2632  * Hot-Plug event, or because the driver is going to be removed from
2633  * memory.
2634  */
2635 static void __devexit atl1c_remove(struct pci_dev *pdev)
2636 {
2637         struct net_device *netdev = pci_get_drvdata(pdev);
2638         struct atl1c_adapter *adapter = netdev_priv(netdev);
2639
2640         unregister_netdev(netdev);
2641         atl1c_phy_disable(&adapter->hw);
2642
2643         iounmap(adapter->hw.hw_addr);
2644
2645         pci_release_regions(pdev);
2646         pci_disable_device(pdev);
2647         free_netdev(netdev);
2648 }
2649
2650 /*
2651  * atl1c_io_error_detected - called when PCI error is detected
2652  * @pdev: Pointer to PCI device
2653  * @state: The current pci connection state
2654  *
2655  * This function is called after a PCI bus error affecting
2656  * this device has been detected.
2657  */
2658 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2659                                                 pci_channel_state_t state)
2660 {
2661         struct net_device *netdev = pci_get_drvdata(pdev);
2662         struct atl1c_adapter *adapter = netdev_priv(netdev);
2663
2664         netif_device_detach(netdev);
2665
2666         if (state == pci_channel_io_perm_failure)
2667                 return PCI_ERS_RESULT_DISCONNECT;
2668
2669         if (netif_running(netdev))
2670                 atl1c_down(adapter);
2671
2672         pci_disable_device(pdev);
2673
2674         /* Request a slot slot reset. */
2675         return PCI_ERS_RESULT_NEED_RESET;
2676 }
2677
2678 /*
2679  * atl1c_io_slot_reset - called after the pci bus has been reset.
2680  * @pdev: Pointer to PCI device
2681  *
2682  * Restart the card from scratch, as if from a cold-boot. Implementation
2683  * resembles the first-half of the e1000_resume routine.
2684  */
2685 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2686 {
2687         struct net_device *netdev = pci_get_drvdata(pdev);
2688         struct atl1c_adapter *adapter = netdev_priv(netdev);
2689
2690         if (pci_enable_device(pdev)) {
2691                 if (netif_msg_hw(adapter))
2692                         dev_err(&pdev->dev,
2693                                 "Cannot re-enable PCI device after reset\n");
2694                 return PCI_ERS_RESULT_DISCONNECT;
2695         }
2696         pci_set_master(pdev);
2697
2698         pci_enable_wake(pdev, PCI_D3hot, 0);
2699         pci_enable_wake(pdev, PCI_D3cold, 0);
2700
2701         atl1c_reset_mac(&adapter->hw);
2702
2703         return PCI_ERS_RESULT_RECOVERED;
2704 }
2705
2706 /*
2707  * atl1c_io_resume - called when traffic can start flowing again.
2708  * @pdev: Pointer to PCI device
2709  *
2710  * This callback is called when the error recovery driver tells us that
2711  * its OK to resume normal operation. Implementation resembles the
2712  * second-half of the atl1c_resume routine.
2713  */
2714 static void atl1c_io_resume(struct pci_dev *pdev)
2715 {
2716         struct net_device *netdev = pci_get_drvdata(pdev);
2717         struct atl1c_adapter *adapter = netdev_priv(netdev);
2718
2719         if (netif_running(netdev)) {
2720                 if (atl1c_up(adapter)) {
2721                         if (netif_msg_hw(adapter))
2722                                 dev_err(&pdev->dev,
2723                                         "Cannot bring device back up after reset\n");
2724                         return;
2725                 }
2726         }
2727
2728         netif_device_attach(netdev);
2729 }
2730
2731 static struct pci_error_handlers atl1c_err_handler = {
2732         .error_detected = atl1c_io_error_detected,
2733         .slot_reset = atl1c_io_slot_reset,
2734         .resume = atl1c_io_resume,
2735 };
2736
2737 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2738
2739 static struct pci_driver atl1c_driver = {
2740         .name     = atl1c_driver_name,
2741         .id_table = atl1c_pci_tbl,
2742         .probe    = atl1c_probe,
2743         .remove   = __devexit_p(atl1c_remove),
2744         .shutdown = atl1c_shutdown,
2745         .err_handler = &atl1c_err_handler,
2746         .driver.pm = &atl1c_pm_ops,
2747 };
2748
2749 /*
2750  * atl1c_init_module - Driver Registration Routine
2751  *
2752  * atl1c_init_module is the first routine called when the driver is
2753  * loaded. All it does is register with the PCI subsystem.
2754  */
2755 static int __init atl1c_init_module(void)
2756 {
2757         return pci_register_driver(&atl1c_driver);
2758 }
2759
2760 /*
2761  * atl1c_exit_module - Driver Exit Cleanup Routine
2762  *
2763  * atl1c_exit_module is called just before the driver is removed
2764  * from memory.
2765  */
2766 static void __exit atl1c_exit_module(void)
2767 {
2768         pci_unregister_driver(&atl1c_driver);
2769 }
2770
2771 module_init(atl1c_init_module);
2772 module_exit(atl1c_exit_module);