drivers/net/ethernet/atheros/atl1c/atl1c_main.c

   1 /*
   2  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1c.h"
  23
  24 #define ATL1C_DRV_VERSION "1.0.1.0-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27
  28 /*
  29  * atl1c_pci_tbl - PCI Device ID Table
  30  *
  31  * Wildcard entries (PCI_ANY_ID) should come last
  32  * Last entry must be all 0s
  33  *
  34  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  35  *   Class, Class Mask, private data (not used) }
  36  */
  37 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = {
  38         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  41         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  42         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  43         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  44         /* required last entry */
  45         { 0 }
  46 };
  47 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  48
  49 MODULE_AUTHOR("Jie Yang");
  50 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
  51 MODULE_DESCRIPTION("Qualcom Atheros 100/1000M Ethernet Network Driver");
  52 MODULE_LICENSE("GPL");
  53 MODULE_VERSION(ATL1C_DRV_VERSION);
  54
  55 static int atl1c_stop_mac(struct atl1c_hw *hw);
  56 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  57 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
  58 static void atl1c_start_mac(struct atl1c_adapter *adapter);
  59 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
  60                    int *work_done, int work_to_do);
  61 static int atl1c_up(struct atl1c_adapter *adapter);
  62 static void atl1c_down(struct atl1c_adapter *adapter);
  63 static int atl1c_reset_mac(struct atl1c_hw *hw);
  64 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
  65 static int atl1c_configure(struct atl1c_adapter *adapter);
  66 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
  67
  68 static const u16 atl1c_pay_load_size[] = {
  69         128, 256, 512, 1024, 2048, 4096,
  70 };
  71
  72
  73 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  74         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  75 static void atl1c_pcie_patch(struct atl1c_hw *hw)
  76 {
  77         u32 mst_data, data;
  78
  79         /* pclk sel could switch to 25M */
  80         AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
  81         mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
  82         AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
  83
  84         /* WoL/PCIE related settings */
  85         if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
  86                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
  87                 data |= PCIE_PHYMISC_FORCE_RCV_DET;
  88                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
  89         } else { /* new dev set bit5 of MASTER */
  90                 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
  91                         AT_WRITE_REG(hw, REG_MASTER_CTRL,
  92                                 mst_data | MASTER_CTRL_WAKEN_25M);
  93         }
  94         /* aspm/PCIE setting only for l2cb 1.0 */
  95         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
  96                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
  97                 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
  98                         L2CB1_PCIE_PHYMISC2_CDR_BW);
  99                 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
 100                         L2CB1_PCIE_PHYMISC2_L0S_TH);
 101                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
 102                 /* extend L1 sync timer */
 103                 AT_READ_REG(hw, REG_LINK_CTRL, &data);
 104                 data |= LINK_CTRL_EXT_SYNC;
 105                 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
 106         }
 107         /* l2cb 1.x & l1d 1.x */
 108         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
 109                 AT_READ_REG(hw, REG_PM_CTRL, &data);
 110                 data |= PM_CTRL_L0S_BUFSRX_EN;
 111                 AT_WRITE_REG(hw, REG_PM_CTRL, data);
 112                 /* clear vendor msg */
 113                 AT_READ_REG(hw, REG_DMA_DBG, &data);
 114                 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
 115         }
 116 }
 117
 118 /* FIXME: no need any more ? */
 119 /*
 120  * atl1c_init_pcie - init PCIE module
 121  */
 122 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 123 {
 124         u32 data;
 125         u32 pci_cmd;
 126         struct pci_dev *pdev = hw->adapter->pdev;
 127         int pos;
 128
 129         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 130         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 131         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 132                 PCI_COMMAND_IO);
 133         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 134
 135         /*
 136          * Clear any PowerSaveing Settings
 137          */
 138         pci_enable_wake(pdev, PCI_D3hot, 0);
 139         pci_enable_wake(pdev, PCI_D3cold, 0);
 140         /* wol sts read-clear */
 141         AT_READ_REG(hw, REG_WOL_CTRL, &data);
 142         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
 143
 144         /*
 145          * Mask some pcie error bits
 146          */
 147         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 148         pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
 149         data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
 150         pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
 151         /* clear error status */
 152         pci_write_config_word(pdev, pci_pcie_cap(pdev) + PCI_EXP_DEVSTA,
 153                         PCI_EXP_DEVSTA_NFED |
 154                         PCI_EXP_DEVSTA_FED |
 155                         PCI_EXP_DEVSTA_CED |
 156                         PCI_EXP_DEVSTA_URD);
 157
 158         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 159         data &= ~LTSSM_ID_EN_WRO;
 160         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 161
 162         atl1c_pcie_patch(hw);
 163         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 164                 atl1c_disable_l0s_l1(hw);
 165
 166         msleep(5);
 167 }
 168
 169 /*
 170  * atl1c_irq_enable - Enable default interrupt generation settings
 171  * @adapter: board private structure
 172  */
 173 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 174 {
 175         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 176                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 177                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 178                 AT_WRITE_FLUSH(&adapter->hw);
 179         }
 180 }
 181
 182 /*
 183  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 184  * @adapter: board private structure
 185  */
 186 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 187 {
 188         atomic_inc(&adapter->irq_sem);
 189         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 190         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 191         AT_WRITE_FLUSH(&adapter->hw);
 192         synchronize_irq(adapter->pdev->irq);
 193 }
 194
 195 /*
 196  * atl1c_irq_reset - reset interrupt confiure on the NIC
 197  * @adapter: board private structure
 198  */
 199 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 200 {
 201         atomic_set(&adapter->irq_sem, 1);
 202         atl1c_irq_enable(adapter);
 203 }
 204
 205 /*
 206  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 207  * of the idle status register until the device is actually idle
 208  */
 209 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
 210 {
 211         int timeout;
 212         u32 data;
 213
 214         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 215                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 216                 if ((data & modu_ctrl) == 0)
 217                         return 0;
 218                 msleep(1);
 219         }
 220         return data;
 221 }
 222
 223 /*
 224  * atl1c_phy_config - Timer Call-back
 225  * @data: pointer to netdev cast into an unsigned long
 226  */
 227 static void atl1c_phy_config(unsigned long data)
 228 {
 229         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 230         struct atl1c_hw *hw = &adapter->hw;
 231         unsigned long flags;
 232
 233         spin_lock_irqsave(&adapter->mdio_lock, flags);
 234         atl1c_restart_autoneg(hw);
 235         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 236 }
 237
 238 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 239 {
 240         WARN_ON(in_interrupt());
 241         atl1c_down(adapter);
 242         atl1c_up(adapter);
 243         clear_bit(__AT_RESETTING, &adapter->flags);
 244 }
 245
 246 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 247 {
 248         struct atl1c_hw *hw = &adapter->hw;
 249         struct net_device *netdev = adapter->netdev;
 250         struct pci_dev    *pdev   = adapter->pdev;
 251         int err;
 252         unsigned long flags;
 253         u16 speed, duplex, phy_data;
 254
 255         spin_lock_irqsave(&adapter->mdio_lock, flags);
 256         /* MII_BMSR must read twise */
 257         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 258         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 259         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 260
 261         if ((phy_data & BMSR_LSTATUS) == 0) {
 262                 /* link down */
 263                 netif_carrier_off(netdev);
 264                 hw->hibernate = true;
 265                 if (atl1c_reset_mac(hw) != 0)
 266                         if (netif_msg_hw(adapter))
 267                                 dev_warn(&pdev->dev, "reset mac failed\n");
 268                 atl1c_set_aspm(hw, SPEED_0);
 269                 atl1c_post_phy_linkchg(hw, SPEED_0);
 270                 atl1c_reset_dma_ring(adapter);
 271                 atl1c_configure(adapter);
 272         } else {
 273                 /* Link Up */
 274                 hw->hibernate = false;
 275                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 276                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 277                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 278                 if (unlikely(err))
 279                         return;
 280                 /* link result is our setting */
 281                 if (adapter->link_speed != speed ||
 282                     adapter->link_duplex != duplex) {
 283                         adapter->link_speed  = speed;
 284                         adapter->link_duplex = duplex;
 285                         atl1c_set_aspm(hw, speed);
 286                         atl1c_post_phy_linkchg(hw, speed);
 287                         atl1c_start_mac(adapter);
 288                         if (netif_msg_link(adapter))
 289                                 dev_info(&pdev->dev,
 290                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 291                                         atl1c_driver_name, netdev->name,
 292                                         adapter->link_speed,
 293                                         adapter->link_duplex == FULL_DUPLEX ?
 294                                         "Full Duplex" : "Half Duplex");
 295                 }
 296                 if (!netif_carrier_ok(netdev))
 297                         netif_carrier_on(netdev);
 298         }
 299 }
 300
 301 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 302 {
 303         struct net_device *netdev = adapter->netdev;
 304         struct pci_dev    *pdev   = adapter->pdev;
 305         u16 phy_data;
 306         u16 link_up;
 307
 308         spin_lock(&adapter->mdio_lock);
 309         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 310         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 311         spin_unlock(&adapter->mdio_lock);
 312         link_up = phy_data & BMSR_LSTATUS;
 313         /* notify upper layer link down ASAP */
 314         if (!link_up) {
 315                 if (netif_carrier_ok(netdev)) {
 316                         /* old link state: Up */
 317                         netif_carrier_off(netdev);
 318                         if (netif_msg_link(adapter))
 319                                 dev_info(&pdev->dev,
 320                                         "%s: %s NIC Link is Down\n",
 321                                         atl1c_driver_name, netdev->name);
 322                         adapter->link_speed = SPEED_0;
 323                 }
 324         }
 325
 326         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 327         schedule_work(&adapter->common_task);
 328 }
 329
 330 static void atl1c_common_task(struct work_struct *work)
 331 {
 332         struct atl1c_adapter *adapter;
 333         struct net_device *netdev;
 334
 335         adapter = container_of(work, struct atl1c_adapter, common_task);
 336         netdev = adapter->netdev;
 337
 338         if (test_bit(__AT_DOWN, &adapter->flags))
 339                 return;
 340
 341         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 342                 netif_device_detach(netdev);
 343                 atl1c_down(adapter);
 344                 atl1c_up(adapter);
 345                 netif_device_attach(netdev);
 346         }
 347
 348         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 349                 &adapter->work_event)) {
 350                 atl1c_irq_disable(adapter);
 351                 atl1c_check_link_status(adapter);
 352                 atl1c_irq_enable(adapter);
 353         }
 354 }
 355
 356
 357 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 358 {
 359         del_timer_sync(&adapter->phy_config_timer);
 360 }
 361
 362
 363 /*
 364  * atl1c_tx_timeout - Respond to a Tx Hang
 365  * @netdev: network interface device structure
 366  */
 367 static void atl1c_tx_timeout(struct net_device *netdev)
 368 {
 369         struct atl1c_adapter *adapter = netdev_priv(netdev);
 370
 371         /* Do the reset outside of interrupt context */
 372         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 373         schedule_work(&adapter->common_task);
 374 }
 375
 376 /*
 377  * atl1c_set_multi - Multicast and Promiscuous mode set
 378  * @netdev: network interface device structure
 379  *
 380  * The set_multi entry point is called whenever the multicast address
 381  * list or the network interface flags are updated.  This routine is
 382  * responsible for configuring the hardware for proper multicast,
 383  * promiscuous mode, and all-multi behavior.
 384  */
 385 static void atl1c_set_multi(struct net_device *netdev)
 386 {
 387         struct atl1c_adapter *adapter = netdev_priv(netdev);
 388         struct atl1c_hw *hw = &adapter->hw;
 389         struct netdev_hw_addr *ha;
 390         u32 mac_ctrl_data;
 391         u32 hash_value;
 392
 393         /* Check for Promiscuous and All Multicast modes */
 394         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 395
 396         if (netdev->flags & IFF_PROMISC) {
 397                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 398         } else if (netdev->flags & IFF_ALLMULTI) {
 399                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 400                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 401         } else {
 402                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 403         }
 404
 405         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 406
 407         /* clear the old settings from the multicast hash table */
 408         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 409         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 410
 411         /* comoute mc addresses' hash value ,and put it into hash table */
 412         netdev_for_each_mc_addr(ha, netdev) {
 413                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 414                 atl1c_hash_set(hw, hash_value);
 415         }
 416 }
 417
 418 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 419 {
 420         if (features & NETIF_F_HW_VLAN_RX) {
 421                 /* enable VLAN tag insert/strip */
 422                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 423         } else {
 424                 /* disable VLAN tag insert/strip */
 425                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 426         }
 427 }
 428
 429 static void atl1c_vlan_mode(struct net_device *netdev,
 430         netdev_features_t features)
 431 {
 432         struct atl1c_adapter *adapter = netdev_priv(netdev);
 433         struct pci_dev *pdev = adapter->pdev;
 434         u32 mac_ctrl_data = 0;
 435
 436         if (netif_msg_pktdata(adapter))
 437                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 438
 439         atl1c_irq_disable(adapter);
 440         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 441         __atl1c_vlan_mode(features, &mac_ctrl_data);
 442         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 443         atl1c_irq_enable(adapter);
 444 }
 445
 446 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 447 {
 448         struct pci_dev *pdev = adapter->pdev;
 449
 450         if (netif_msg_pktdata(adapter))
 451                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 452         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 453 }
 454
 455 /*
 456  * atl1c_set_mac - Change the Ethernet Address of the NIC
 457  * @netdev: network interface device structure
 458  * @p: pointer to an address structure
 459  *
 460  * Returns 0 on success, negative on failure
 461  */
 462 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 463 {
 464         struct atl1c_adapter *adapter = netdev_priv(netdev);
 465         struct sockaddr *addr = p;
 466
 467         if (!is_valid_ether_addr(addr->sa_data))
 468                 return -EADDRNOTAVAIL;
 469
 470         if (netif_running(netdev))
 471                 return -EBUSY;
 472
 473         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 474         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 475         netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
 476
 477         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
 478
 479         return 0;
 480 }
 481
 482 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 483                                 struct net_device *dev)
 484 {
 485         int mtu = dev->mtu;
 486
 487         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 488                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 489 }
 490
 491 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 492         netdev_features_t features)
 493 {
 494         /*
 495          * Since there is no support for separate rx/tx vlan accel
 496          * enable/disable make sure tx flag is always in same state as rx.
 497          */
 498         if (features & NETIF_F_HW_VLAN_RX)
 499                 features |= NETIF_F_HW_VLAN_TX;
 500         else
 501                 features &= ~NETIF_F_HW_VLAN_TX;
 502
 503         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 504                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 505
 506         return features;
 507 }
 508
 509 static int atl1c_set_features(struct net_device *netdev,
 510         netdev_features_t features)
 511 {
 512         netdev_features_t changed = netdev->features ^ features;
 513
 514         if (changed & NETIF_F_HW_VLAN_RX)
 515                 atl1c_vlan_mode(netdev, features);
 516
 517         return 0;
 518 }
 519
 520 /*
 521  * atl1c_change_mtu - Change the Maximum Transfer Unit
 522  * @netdev: network interface device structure
 523  * @new_mtu: new value for maximum frame size
 524  *
 525  * Returns 0 on success, negative on failure
 526  */
 527 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 528 {
 529         struct atl1c_adapter *adapter = netdev_priv(netdev);
 530         struct atl1c_hw *hw = &adapter->hw;
 531         int old_mtu   = netdev->mtu;
 532         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 533
 534         /* Fast Ethernet controller doesn't support jumbo packet */
 535         if (((hw->nic_type == athr_l2c ||
 536               hw->nic_type == athr_l2c_b ||
 537               hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
 538               max_frame < ETH_ZLEN + ETH_FCS_LEN ||
 539               max_frame > MAX_JUMBO_FRAME_SIZE) {
 540                 if (netif_msg_link(adapter))
 541                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 542                 return -EINVAL;
 543         }
 544         /* set MTU */
 545         if (old_mtu != new_mtu && netif_running(netdev)) {
 546                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 547                         msleep(1);
 548                 netdev->mtu = new_mtu;
 549                 adapter->hw.max_frame_size = new_mtu;
 550                 atl1c_set_rxbufsize(adapter, netdev);
 551                 atl1c_down(adapter);
 552                 netdev_update_features(netdev);
 553                 atl1c_up(adapter);
 554                 clear_bit(__AT_RESETTING, &adapter->flags);
 555         }
 556         return 0;
 557 }
 558
 559 /*
 560  *  caller should hold mdio_lock
 561  */
 562 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 563 {
 564         struct atl1c_adapter *adapter = netdev_priv(netdev);
 565         u16 result;
 566
 567         atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
 568         return result;
 569 }
 570
 571 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 572                              int reg_num, int val)
 573 {
 574         struct atl1c_adapter *adapter = netdev_priv(netdev);
 575
 576         atl1c_write_phy_reg(&adapter->hw, reg_num, val);
 577 }
 578
 579 /*
 580  * atl1c_mii_ioctl -
 581  * @netdev:
 582  * @ifreq:
 583  * @cmd:
 584  */
 585 static int atl1c_mii_ioctl(struct net_device *netdev,
 586                            struct ifreq *ifr, int cmd)
 587 {
 588         struct atl1c_adapter *adapter = netdev_priv(netdev);
 589         struct pci_dev *pdev = adapter->pdev;
 590         struct mii_ioctl_data *data = if_mii(ifr);
 591         unsigned long flags;
 592         int retval = 0;
 593
 594         if (!netif_running(netdev))
 595                 return -EINVAL;
 596
 597         spin_lock_irqsave(&adapter->mdio_lock, flags);
 598         switch (cmd) {
 599         case SIOCGMIIPHY:
 600                 data->phy_id = 0;
 601                 break;
 602
 603         case SIOCGMIIREG:
 604                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 605                                     &data->val_out)) {
 606                         retval = -EIO;
 607                         goto out;
 608                 }
 609                 break;
 610
 611         case SIOCSMIIREG:
 612                 if (data->reg_num & ~(0x1F)) {
 613                         retval = -EFAULT;
 614                         goto out;
 615                 }
 616
 617                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 618                                 data->reg_num, data->val_in);
 619                 if (atl1c_write_phy_reg(&adapter->hw,
 620                                      data->reg_num, data->val_in)) {
 621                         retval = -EIO;
 622                         goto out;
 623                 }
 624                 break;
 625
 626         default:
 627                 retval = -EOPNOTSUPP;
 628                 break;
 629         }
 630 out:
 631         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 632         return retval;
 633 }
 634
 635 /*
 636  * atl1c_ioctl -
 637  * @netdev:
 638  * @ifreq:
 639  * @cmd:
 640  */
 641 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 642 {
 643         switch (cmd) {
 644         case SIOCGMIIPHY:
 645         case SIOCGMIIREG:
 646         case SIOCSMIIREG:
 647                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 648         default:
 649                 return -EOPNOTSUPP;
 650         }
 651 }
 652
 653 /*
 654  * atl1c_alloc_queues - Allocate memory for all rings
 655  * @adapter: board private structure to initialize
 656  *
 657  */
 658 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 659 {
 660         return 0;
 661 }
 662
 663 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 664 {
 665         switch (hw->device_id) {
 666         case PCI_DEVICE_ID_ATTANSIC_L2C:
 667                 hw->nic_type = athr_l2c;
 668                 break;
 669         case PCI_DEVICE_ID_ATTANSIC_L1C:
 670                 hw->nic_type = athr_l1c;
 671                 break;
 672         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 673                 hw->nic_type = athr_l2c_b;
 674                 break;
 675         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 676                 hw->nic_type = athr_l2c_b2;
 677                 break;
 678         case PCI_DEVICE_ID_ATHEROS_L1D:
 679                 hw->nic_type = athr_l1d;
 680                 break;
 681         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 682                 hw->nic_type = athr_l1d_2;
 683                 break;
 684         default:
 685                 break;
 686         }
 687 }
 688
 689 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 690 {
 691         u32 link_ctrl_data;
 692
 693         atl1c_set_mac_type(hw);
 694         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 695
 696         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 697                          ATL1C_TXQ_MODE_ENHANCE;
 698         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 699                           ATL1C_ASPM_L1_SUPPORT;
 700         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 701
 702         if (hw->nic_type == athr_l1c ||
 703             hw->nic_type == athr_l1d ||
 704             hw->nic_type == athr_l1d_2)
 705                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 706         return 0;
 707 }
 708
 709 struct atl1c_platform_patch {
 710         u16 pci_did;
 711         u8  pci_revid;
 712         u16 subsystem_vid;
 713         u16 subsystem_did;
 714         u32 patch_flag;
 715 #define ATL1C_LINK_PATCH        0x1
 716 };
 717 static const struct atl1c_platform_patch plats[] __devinitdata = {
 718 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
 719 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
 720 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
 721 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
 722 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
 723 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
 724 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
 725 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
 726 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
 727 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
 728 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
 729 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
 730 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
 731 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
 732 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
 733 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
 734 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
 735 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
 736 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
 737 {0},
 738 };
 739
 740 static void __devinit atl1c_patch_assign(struct atl1c_hw *hw)
 741 {
 742         int i = 0;
 743
 744         hw->msi_lnkpatch = false;
 745
 746         while (plats[i].pci_did != 0) {
 747                 if (plats[i].pci_did == hw->device_id &&
 748                     plats[i].pci_revid == hw->revision_id &&
 749                     plats[i].subsystem_vid == hw->subsystem_vendor_id &&
 750                     plats[i].subsystem_did == hw->subsystem_id) {
 751                         if (plats[i].patch_flag & ATL1C_LINK_PATCH)
 752                                 hw->msi_lnkpatch = true;
 753                 }
 754                 i++;
 755         }
 756 }
 757 /*
 758  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 759  * @adapter: board private structure to initialize
 760  *
 761  * atl1c_sw_init initializes the Adapter private data structure.
 762  * Fields are initialized based on PCI device information and
 763  * OS network device settings (MTU size).
 764  */
 765 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 766 {
 767         struct atl1c_hw *hw   = &adapter->hw;
 768         struct pci_dev  *pdev = adapter->pdev;
 769         u32 revision;
 770
 771
 772         adapter->wol = 0;
 773         device_set_wakeup_enable(&pdev->dev, false);
 774         adapter->link_speed = SPEED_0;
 775         adapter->link_duplex = FULL_DUPLEX;
 776         adapter->tpd_ring[0].count = 1024;
 777         adapter->rfd_ring.count = 512;
 778
 779         hw->vendor_id = pdev->vendor;
 780         hw->device_id = pdev->device;
 781         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 782         hw->subsystem_id = pdev->subsystem_device;
 783         AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
 784         hw->revision_id = revision & 0xFF;
 785         /* before link up, we assume hibernate is true */
 786         hw->hibernate = true;
 787         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 788         if (atl1c_setup_mac_funcs(hw) != 0) {
 789                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 790                 return -1;
 791         }
 792         atl1c_patch_assign(hw);
 793
 794         hw->intr_mask = IMR_NORMAL_MASK;
 795         hw->phy_configured = false;
 796         hw->preamble_len = 7;
 797         hw->max_frame_size = adapter->netdev->mtu;
 798         hw->autoneg_advertised = ADVERTISED_Autoneg;
 799         hw->indirect_tab = 0xE4E4E4E4;
 800         hw->base_cpu = 0;
 801
 802         hw->ict = 50000;                /* 100ms */
 803         hw->smb_timer = 200000;         /* 400ms */
 804         hw->rx_imt = 200;
 805         hw->tx_imt = 1000;
 806
 807         hw->tpd_burst = 5;
 808         hw->rfd_burst = 8;
 809         hw->dma_order = atl1c_dma_ord_out;
 810         hw->dmar_block = atl1c_dma_req_1024;
 811
 812         if (atl1c_alloc_queues(adapter)) {
 813                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 814                 return -ENOMEM;
 815         }
 816         /* TODO */
 817         atl1c_set_rxbufsize(adapter, adapter->netdev);
 818         atomic_set(&adapter->irq_sem, 1);
 819         spin_lock_init(&adapter->mdio_lock);
 820         spin_lock_init(&adapter->tx_lock);
 821         set_bit(__AT_DOWN, &adapter->flags);
 822
 823         return 0;
 824 }
 825
 826 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 827                                 struct atl1c_buffer *buffer_info, int in_irq)
 828 {
 829         u16 pci_driection;
 830         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 831                 return;
 832         if (buffer_info->dma) {
 833                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 834                         pci_driection = PCI_DMA_FROMDEVICE;
 835                 else
 836                         pci_driection = PCI_DMA_TODEVICE;
 837
 838                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 839                         pci_unmap_single(pdev, buffer_info->dma,
 840                                         buffer_info->length, pci_driection);
 841                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 842                         pci_unmap_page(pdev, buffer_info->dma,
 843                                         buffer_info->length, pci_driection);
 844         }
 845         if (buffer_info->skb) {
 846                 if (in_irq)
 847                         dev_kfree_skb_irq(buffer_info->skb);
 848                 else
 849                         dev_kfree_skb(buffer_info->skb);
 850         }
 851         buffer_info->dma = 0;
 852         buffer_info->skb = NULL;
 853         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 854 }
 855 /*
 856  * atl1c_clean_tx_ring - Free Tx-skb
 857  * @adapter: board private structure
 858  */
 859 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 860                                 enum atl1c_trans_queue type)
 861 {
 862         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 863         struct atl1c_buffer *buffer_info;
 864         struct pci_dev *pdev = adapter->pdev;
 865         u16 index, ring_count;
 866
 867         ring_count = tpd_ring->count;
 868         for (index = 0; index < ring_count; index++) {
 869                 buffer_info = &tpd_ring->buffer_info[index];
 870                 atl1c_clean_buffer(pdev, buffer_info, 0);
 871         }
 872
 873         /* Zero out Tx-buffers */
 874         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 875                 ring_count);
 876         atomic_set(&tpd_ring->next_to_clean, 0);
 877         tpd_ring->next_to_use = 0;
 878 }
 879
 880 /*
 881  * atl1c_clean_rx_ring - Free rx-reservation skbs
 882  * @adapter: board private structure
 883  */
 884 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 885 {
 886         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 887         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 888         struct atl1c_buffer *buffer_info;
 889         struct pci_dev *pdev = adapter->pdev;
 890         int j;
 891
 892         for (j = 0; j < rfd_ring->count; j++) {
 893                 buffer_info = &rfd_ring->buffer_info[j];
 894                 atl1c_clean_buffer(pdev, buffer_info, 0);
 895         }
 896         /* zero out the descriptor ring */
 897         memset(rfd_ring->desc, 0, rfd_ring->size);
 898         rfd_ring->next_to_clean = 0;
 899         rfd_ring->next_to_use = 0;
 900         rrd_ring->next_to_use = 0;
 901         rrd_ring->next_to_clean = 0;
 902 }
 903
 904 /*
 905  * Read / Write Ptr Initialize:
 906  */
 907 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 908 {
 909         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 910         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 911         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 912         struct atl1c_buffer *buffer_info;
 913         int i, j;
 914
 915         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 916                 tpd_ring[i].next_to_use = 0;
 917                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 918                 buffer_info = tpd_ring[i].buffer_info;
 919                 for (j = 0; j < tpd_ring->count; j++)
 920                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 921                                         ATL1C_BUFFER_FREE);
 922         }
 923         rfd_ring->next_to_use = 0;
 924         rfd_ring->next_to_clean = 0;
 925         rrd_ring->next_to_use = 0;
 926         rrd_ring->next_to_clean = 0;
 927         for (j = 0; j < rfd_ring->count; j++) {
 928                 buffer_info = &rfd_ring->buffer_info[j];
 929                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 930         }
 931 }
 932
 933 /*
 934  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 935  * @adapter: board private structure
 936  *
 937  * Free all transmit software resources
 938  */
 939 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 940 {
 941         struct pci_dev *pdev = adapter->pdev;
 942
 943         pci_free_consistent(pdev, adapter->ring_header.size,
 944                                         adapter->ring_header.desc,
 945                                         adapter->ring_header.dma);
 946         adapter->ring_header.desc = NULL;
 947
 948         /* Note: just free tdp_ring.buffer_info,
 949         *  it contain rfd_ring.buffer_info, do not double free */
 950         if (adapter->tpd_ring[0].buffer_info) {
 951                 kfree(adapter->tpd_ring[0].buffer_info);
 952                 adapter->tpd_ring[0].buffer_info = NULL;
 953         }
 954 }
 955
 956 /*
 957  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 958  * @adapter: board private structure
 959  *
 960  * Return 0 on success, negative on failure
 961  */
 962 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 963 {
 964         struct pci_dev *pdev = adapter->pdev;
 965         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 966         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 967         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 968         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 969         int size;
 970         int i;
 971         int count = 0;
 972         int rx_desc_count = 0;
 973         u32 offset = 0;
 974
 975         rrd_ring->count = rfd_ring->count;
 976         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 977                 tpd_ring[i].count = tpd_ring[0].count;
 978
 979         /* 2 tpd queue, one high priority queue,
 980          * another normal priority queue */
 981         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 982                 rfd_ring->count);
 983         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 984         if (unlikely(!tpd_ring->buffer_info)) {
 985                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 986                         size);
 987                 goto err_nomem;
 988         }
 989         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 990                 tpd_ring[i].buffer_info =
 991                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 992                 count += tpd_ring[i].count;
 993         }
 994
 995         rfd_ring->buffer_info =
 996                 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 997         count += rfd_ring->count;
 998         rx_desc_count += rfd_ring->count;
 999
1000         /*
1001          * real ring DMA buffer
1002          * each ring/block may need up to 8 bytes for alignment, hence the
1003          * additional bytes tacked onto the end.
1004          */
1005         ring_header->size = size =
1006                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1007                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1008                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1009                 8 * 4;
1010
1011         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1012                                 &ring_header->dma);
1013         if (unlikely(!ring_header->desc)) {
1014                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1015                 goto err_nomem;
1016         }
1017         memset(ring_header->desc, 0, ring_header->size);
1018         /* init TPD ring */
1019
1020         tpd_ring[0].dma = roundup(ring_header->dma, 8);
1021         offset = tpd_ring[0].dma - ring_header->dma;
1022         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1023                 tpd_ring[i].dma = ring_header->dma + offset;
1024                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1025                 tpd_ring[i].size =
1026                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1027                 offset += roundup(tpd_ring[i].size, 8);
1028         }
1029         /* init RFD ring */
1030         rfd_ring->dma = ring_header->dma + offset;
1031         rfd_ring->desc = (u8 *) ring_header->desc + offset;
1032         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1033         offset += roundup(rfd_ring->size, 8);
1034
1035         /* init RRD ring */
1036         rrd_ring->dma = ring_header->dma + offset;
1037         rrd_ring->desc = (u8 *) ring_header->desc + offset;
1038         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1039                 rrd_ring->count;
1040         offset += roundup(rrd_ring->size, 8);
1041
1042         return 0;
1043
1044 err_nomem:
1045         kfree(tpd_ring->buffer_info);
1046         return -ENOMEM;
1047 }
1048
1049 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1050 {
1051         struct atl1c_hw *hw = &adapter->hw;
1052         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1053         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1054         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1055                                 adapter->tpd_ring;
1056
1057         /* TPD */
1058         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1059                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1060                                 AT_DMA_HI_ADDR_MASK) >> 32));
1061         /* just enable normal priority TX queue */
1062         AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1063                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1064                                 AT_DMA_LO_ADDR_MASK));
1065         AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1066                         (u32)(tpd_ring[atl1c_trans_high].dma &
1067                                 AT_DMA_LO_ADDR_MASK));
1068         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1069                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1070
1071
1072         /* RFD */
1073         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1074                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1075         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1076                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1077
1078         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1079                         rfd_ring->count & RFD_RING_SIZE_MASK);
1080         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1081                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1082
1083         /* RRD */
1084         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1085                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1086         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1087                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1088
1089         if (hw->nic_type == athr_l2c_b) {
1090                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1091                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1092                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1093                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1094                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1095                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1096                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1097                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1098         }
1099         /* Load all of base address above */
1100         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1101 }
1102
1103 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1104 {
1105         struct atl1c_hw *hw = &adapter->hw;
1106         int max_pay_load;
1107         u16 tx_offload_thresh;
1108         u32 txq_ctrl_data;
1109
1110         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1111         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1112                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1113         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1114         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1115         /*
1116          * if BIOS had changed the dam-read-max-length to an invalid value,
1117          * restore it to default value
1118          */
1119         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1120                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1121                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1122         }
1123         txq_ctrl_data =
1124                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1125                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1126
1127         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1128 }
1129
1130 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1131 {
1132         struct atl1c_hw *hw = &adapter->hw;
1133         u32 rxq_ctrl_data;
1134
1135         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1136                         RXQ_RFD_BURST_NUM_SHIFT;
1137
1138         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1139                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1140
1141         /* aspm for gigabit */
1142         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1143                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1144                         ASPM_THRUPUT_LIMIT_100M);
1145
1146         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1147 }
1148
1149 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1150 {
1151         struct atl1c_hw *hw = &adapter->hw;
1152         u32 dma_ctrl_data;
1153
1154         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1155                 DMA_CTRL_RREQ_PRI_DATA |
1156                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1157                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1158                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1159
1160         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1161 }
1162
1163 /*
1164  * Stop the mac, transmit and receive units
1165  * hw - Struct containing variables accessed by shared code
1166  * return : 0  or  idle status (if error)
1167  */
1168 static int atl1c_stop_mac(struct atl1c_hw *hw)
1169 {
1170         u32 data;
1171
1172         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1173         data &= ~RXQ_CTRL_EN;
1174         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1175
1176         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1177         data &= ~TXQ_CTRL_EN;
1178         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1179
1180         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1181
1182         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1183         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1184         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1185
1186         return (int)atl1c_wait_until_idle(hw,
1187                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1188 }
1189
1190 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1191 {
1192         struct atl1c_hw *hw = &adapter->hw;
1193         u32 mac, txq, rxq;
1194
1195         hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1196         hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1197                 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1198
1199         AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1200         AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1201         AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1202
1203         txq |= TXQ_CTRL_EN;
1204         rxq |= RXQ_CTRL_EN;
1205         mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1206                MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1207                MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1208                MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1209                MAC_CTRL_HASH_ALG_CRC32;
1210         if (hw->mac_duplex)
1211                 mac |= MAC_CTRL_DUPLX;
1212         else
1213                 mac &= ~MAC_CTRL_DUPLX;
1214         mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1215         mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1216
1217         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1218         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1219         AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1220 }
1221
1222 /*
1223  * Reset the transmit and receive units; mask and clear all interrupts.
1224  * hw - Struct containing variables accessed by shared code
1225  * return : 0  or  idle status (if error)
1226  */
1227 static int atl1c_reset_mac(struct atl1c_hw *hw)
1228 {
1229         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1230         struct pci_dev *pdev = adapter->pdev;
1231         u32 ctrl_data = 0;
1232
1233         atl1c_stop_mac(hw);
1234         /*
1235          * Issue Soft Reset to the MAC.  This will reset the chip's
1236          * transmit, receive, DMA.  It will not effect
1237          * the current PCI configuration.  The global reset bit is self-
1238          * clearing, and should clear within a microsecond.
1239          */
1240         AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1241         ctrl_data |= MASTER_CTRL_OOB_DIS;
1242         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1243
1244         AT_WRITE_FLUSH(hw);
1245         msleep(10);
1246         /* Wait at least 10ms for All module to be Idle */
1247
1248         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1249                 dev_err(&pdev->dev,
1250                         "MAC state machine can't be idle since"
1251                         " disabled for 10ms second\n");
1252                 return -1;
1253         }
1254         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1255
1256         /* driver control speed/duplex */
1257         AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1258         AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1259
1260         /* clk switch setting */
1261         AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1262         switch (hw->nic_type) {
1263         case athr_l2c_b:
1264                 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1265                                 SERDES_MAC_CLK_SLOWDOWN);
1266                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1267                 break;
1268         case athr_l2c_b2:
1269         case athr_l1d_2:
1270                 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1271                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1272                 break;
1273         default:
1274                 break;
1275         }
1276
1277         return 0;
1278 }
1279
1280 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1281 {
1282         u16 ctrl_flags = hw->ctrl_flags;
1283
1284         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1285         atl1c_set_aspm(hw, SPEED_0);
1286         hw->ctrl_flags = ctrl_flags;
1287 }
1288
1289 /*
1290  * Set ASPM state.
1291  * Enable/disable L0s/L1 depend on link state.
1292  */
1293 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1294 {
1295         u32 pm_ctrl_data;
1296         u32 link_l1_timer;
1297
1298         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1299         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1300                           PM_CTRL_ASPM_L0S_EN |
1301                           PM_CTRL_MAC_ASPM_CHK);
1302         /* L1 timer */
1303         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1304                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1305                 link_l1_timer =
1306                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1307                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1308                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1309                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1310         } else {
1311                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1312                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1313                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1314                         link_l1_timer = 1;
1315                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1316                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1317         }
1318
1319         /* L0S/L1 enable */
1320         if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1321                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1322         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1323                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1324
1325         /* l2cb & l1d & l2cb2 & l1d2 */
1326         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1327             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1328                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1329                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1330                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1331                                 PM_CTRL_SERDES_PD_EX_L1 |
1332                                 PM_CTRL_CLK_SWH_L1;
1333                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1334                                   PM_CTRL_SERDES_PLL_L1_EN |
1335                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1336                                   PM_CTRL_SA_DLY_EN |
1337                                   PM_CTRL_HOTRST);
1338                 /* disable l0s if link down or l2cb */
1339                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1340                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1341         } else { /* l1c */
1342                 pm_ctrl_data =
1343                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1344                 if (link_speed != SPEED_0) {
1345                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1346                                         PM_CTRL_SERDES_PLL_L1_EN |
1347                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1348                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1349                                           PM_CTRL_CLK_SWH_L1 |
1350                                           PM_CTRL_ASPM_L0S_EN |
1351                                           PM_CTRL_ASPM_L1_EN);
1352                 } else { /* link down */
1353                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1354                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1355                                           PM_CTRL_SERDES_PLL_L1_EN |
1356                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1357                                           PM_CTRL_ASPM_L0S_EN);
1358                 }
1359         }
1360         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1361
1362         return;
1363 }
1364
1365 /*
1366  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1367  * @adapter: board private structure
1368  *
1369  * Configure the Tx /Rx unit of the MAC after a reset.
1370  */
1371 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1372 {
1373         struct atl1c_hw *hw = &adapter->hw;
1374         u32 master_ctrl_data = 0;
1375         u32 intr_modrt_data;
1376         u32 data;
1377
1378         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1379         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1380                               MASTER_CTRL_RX_ITIMER_EN |
1381                               MASTER_CTRL_INT_RDCLR);
1382         /* clear interrupt status */
1383         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1384         /*  Clear any WOL status */
1385         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1386         /* set Interrupt Clear Timer
1387          * HW will enable self to assert interrupt event to system after
1388          * waiting x-time for software to notify it accept interrupt.
1389          */
1390
1391         data = CLK_GATING_EN_ALL;
1392         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1393                 if (hw->nic_type == athr_l2c_b)
1394                         data &= ~CLK_GATING_RXMAC_EN;
1395         } else
1396                 data = 0;
1397         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1398
1399         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1400                 hw->ict & INT_RETRIG_TIMER_MASK);
1401
1402         atl1c_configure_des_ring(adapter);
1403
1404         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1405                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1406                                         IRQ_MODRT_TX_TIMER_SHIFT;
1407                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1408                                         IRQ_MODRT_RX_TIMER_SHIFT;
1409                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1410                 master_ctrl_data |=
1411                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1412         }
1413
1414         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1415                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1416
1417         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1418         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1419
1420         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1421                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1422
1423         /* set MTU */
1424         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1425                         VLAN_HLEN + ETH_FCS_LEN);
1426
1427         atl1c_configure_tx(adapter);
1428         atl1c_configure_rx(adapter);
1429         atl1c_configure_dma(adapter);
1430
1431         return 0;
1432 }
1433
1434 static int atl1c_configure(struct atl1c_adapter *adapter)
1435 {
1436         struct net_device *netdev = adapter->netdev;
1437         int num;
1438
1439         atl1c_init_ring_ptrs(adapter);
1440         atl1c_set_multi(netdev);
1441         atl1c_restore_vlan(adapter);
1442
1443         num = atl1c_alloc_rx_buffer(adapter);
1444         if (unlikely(num == 0))
1445                 return -ENOMEM;
1446
1447         if (atl1c_configure_mac(adapter))
1448                 return -EIO;
1449
1450         return 0;
1451 }
1452
1453 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1454 {
1455         u16 hw_reg_addr = 0;
1456         unsigned long *stats_item = NULL;
1457         u32 data;
1458
1459         /* update rx status */
1460         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1461         stats_item  = &adapter->hw_stats.rx_ok;
1462         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1463                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1464                 *stats_item += data;
1465                 stats_item++;
1466                 hw_reg_addr += 4;
1467         }
1468 /* update tx status */
1469         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1470         stats_item  = &adapter->hw_stats.tx_ok;
1471         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1472                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1473                 *stats_item += data;
1474                 stats_item++;
1475                 hw_reg_addr += 4;
1476         }
1477 }
1478
1479 /*
1480  * atl1c_get_stats - Get System Network Statistics
1481  * @netdev: network interface device structure
1482  *
1483  * Returns the address of the device statistics structure.
1484  * The statistics are actually updated from the timer callback.
1485  */
1486 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1487 {
1488         struct atl1c_adapter *adapter = netdev_priv(netdev);
1489         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1490         struct net_device_stats *net_stats = &netdev->stats;
1491
1492         atl1c_update_hw_stats(adapter);
1493         net_stats->rx_packets = hw_stats->rx_ok;
1494         net_stats->tx_packets = hw_stats->tx_ok;
1495         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1496         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1497         net_stats->multicast  = hw_stats->rx_mcast;
1498         net_stats->collisions = hw_stats->tx_1_col +
1499                                 hw_stats->tx_2_col * 2 +
1500                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1501         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1502                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1503                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1504         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1505         net_stats->rx_length_errors = hw_stats->rx_len_err;
1506         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1507         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1508         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1509
1510         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1511
1512         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1513                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1514         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1515         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1516         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1517
1518         return net_stats;
1519 }
1520
1521 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1522 {
1523         u16 phy_data;
1524
1525         spin_lock(&adapter->mdio_lock);
1526         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1527         spin_unlock(&adapter->mdio_lock);
1528 }
1529
1530 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1531                                 enum atl1c_trans_queue type)
1532 {
1533         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1534                                 &adapter->tpd_ring[type];
1535         struct atl1c_buffer *buffer_info;
1536         struct pci_dev *pdev = adapter->pdev;
1537         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1538         u16 hw_next_to_clean;
1539         u16 reg;
1540
1541         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1542
1543         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1544
1545         while (next_to_clean != hw_next_to_clean) {
1546                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1547                 atl1c_clean_buffer(pdev, buffer_info, 1);
1548                 if (++next_to_clean == tpd_ring->count)
1549                         next_to_clean = 0;
1550                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1551         }
1552
1553         if (netif_queue_stopped(adapter->netdev) &&
1554                         netif_carrier_ok(adapter->netdev)) {
1555                 netif_wake_queue(adapter->netdev);
1556         }
1557
1558         return true;
1559 }
1560
1561 /*
1562  * atl1c_intr - Interrupt Handler
1563  * @irq: interrupt number
1564  * @data: pointer to a network interface device structure
1565  * @pt_regs: CPU registers structure
1566  */
1567 static irqreturn_t atl1c_intr(int irq, void *data)
1568 {
1569         struct net_device *netdev  = data;
1570         struct atl1c_adapter *adapter = netdev_priv(netdev);
1571         struct pci_dev *pdev = adapter->pdev;
1572         struct atl1c_hw *hw = &adapter->hw;
1573         int max_ints = AT_MAX_INT_WORK;
1574         int handled = IRQ_NONE;
1575         u32 status;
1576         u32 reg_data;
1577
1578         do {
1579                 AT_READ_REG(hw, REG_ISR, &reg_data);
1580                 status = reg_data & hw->intr_mask;
1581
1582                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1583                         if (max_ints != AT_MAX_INT_WORK)
1584                                 handled = IRQ_HANDLED;
1585                         break;
1586                 }
1587                 /* link event */
1588                 if (status & ISR_GPHY)
1589                         atl1c_clear_phy_int(adapter);
1590                 /* Ack ISR */
1591                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1592                 if (status & ISR_RX_PKT) {
1593                         if (likely(napi_schedule_prep(&adapter->napi))) {
1594                                 hw->intr_mask &= ~ISR_RX_PKT;
1595                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1596                                 __napi_schedule(&adapter->napi);
1597                         }
1598                 }
1599                 if (status & ISR_TX_PKT)
1600                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1601
1602                 handled = IRQ_HANDLED;
1603                 /* check if PCIE PHY Link down */
1604                 if (status & ISR_ERROR) {
1605                         if (netif_msg_hw(adapter))
1606                                 dev_err(&pdev->dev,
1607                                         "atl1c hardware error (status = 0x%x)\n",
1608                                         status & ISR_ERROR);
1609                         /* reset MAC */
1610                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1611                         schedule_work(&adapter->common_task);
1612                         return IRQ_HANDLED;
1613                 }
1614
1615                 if (status & ISR_OVER)
1616                         if (netif_msg_intr(adapter))
1617                                 dev_warn(&pdev->dev,
1618                                         "TX/RX overflow (status = 0x%x)\n",
1619                                         status & ISR_OVER);
1620
1621                 /* link event */
1622                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1623                         netdev->stats.tx_carrier_errors++;
1624                         atl1c_link_chg_event(adapter);
1625                         break;
1626                 }
1627
1628         } while (--max_ints > 0);
1629         /* re-enable Interrupt*/
1630         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1631         return handled;
1632 }
1633
1634 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1635                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1636 {
1637         /*
1638          * The pid field in RRS in not correct sometimes, so we
1639          * cannot figure out if the packet is fragmented or not,
1640          * so we tell the KERNEL CHECKSUM_NONE
1641          */
1642         skb_checksum_none_assert(skb);
1643 }
1644
1645 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1646 {
1647         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1648         struct pci_dev *pdev = adapter->pdev;
1649         struct atl1c_buffer *buffer_info, *next_info;
1650         struct sk_buff *skb;
1651         void *vir_addr = NULL;
1652         u16 num_alloc = 0;
1653         u16 rfd_next_to_use, next_next;
1654         struct atl1c_rx_free_desc *rfd_desc;
1655
1656         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1657         if (++next_next == rfd_ring->count)
1658                 next_next = 0;
1659         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1660         next_info = &rfd_ring->buffer_info[next_next];
1661
1662         while (next_info->flags & ATL1C_BUFFER_FREE) {
1663                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1664
1665                 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len);
1666                 if (unlikely(!skb)) {
1667                         if (netif_msg_rx_err(adapter))
1668                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1669                         break;
1670                 }
1671
1672                 /*
1673                  * Make buffer alignment 2 beyond a 16 byte boundary
1674                  * this will result in a 16 byte aligned IP header after
1675                  * the 14 byte MAC header is removed
1676                  */
1677                 vir_addr = skb->data;
1678                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1679                 buffer_info->skb = skb;
1680                 buffer_info->length = adapter->rx_buffer_len;
1681                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1682                                                 buffer_info->length,
1683                                                 PCI_DMA_FROMDEVICE);
1684                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1685                         ATL1C_PCIMAP_FROMDEVICE);
1686                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1687                 rfd_next_to_use = next_next;
1688                 if (++next_next == rfd_ring->count)
1689                         next_next = 0;
1690                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1691                 next_info = &rfd_ring->buffer_info[next_next];
1692                 num_alloc++;
1693         }
1694
1695         if (num_alloc) {
1696                 /* TODO: update mailbox here */
1697                 wmb();
1698                 rfd_ring->next_to_use = rfd_next_to_use;
1699                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1700                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1701         }
1702
1703         return num_alloc;
1704 }
1705
1706 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1707                         struct  atl1c_recv_ret_status *rrs, u16 num)
1708 {
1709         u16 i;
1710         /* the relationship between rrd and rfd is one map one */
1711         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1712                                         rrd_ring->next_to_clean)) {
1713                 rrs->word3 &= ~RRS_RXD_UPDATED;
1714                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1715                         rrd_ring->next_to_clean = 0;
1716         }
1717 }
1718
1719 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1720         struct atl1c_recv_ret_status *rrs, u16 num)
1721 {
1722         u16 i;
1723         u16 rfd_index;
1724         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1725
1726         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1727                         RRS_RX_RFD_INDEX_MASK;
1728         for (i = 0; i < num; i++) {
1729                 buffer_info[rfd_index].skb = NULL;
1730                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1731                                         ATL1C_BUFFER_FREE);
1732                 if (++rfd_index == rfd_ring->count)
1733                         rfd_index = 0;
1734         }
1735         rfd_ring->next_to_clean = rfd_index;
1736 }
1737
1738 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1739                    int *work_done, int work_to_do)
1740 {
1741         u16 rfd_num, rfd_index;
1742         u16 count = 0;
1743         u16 length;
1744         struct pci_dev *pdev = adapter->pdev;
1745         struct net_device *netdev  = adapter->netdev;
1746         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1747         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1748         struct sk_buff *skb;
1749         struct atl1c_recv_ret_status *rrs;
1750         struct atl1c_buffer *buffer_info;
1751
1752         while (1) {
1753                 if (*work_done >= work_to_do)
1754                         break;
1755                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1756                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1757                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1758                                 RRS_RX_RFD_CNT_MASK;
1759                         if (unlikely(rfd_num != 1))
1760                                 /* TODO support mul rfd*/
1761                                 if (netif_msg_rx_err(adapter))
1762                                         dev_warn(&pdev->dev,
1763                                                 "Multi rfd not support yet!\n");
1764                         goto rrs_checked;
1765                 } else {
1766                         break;
1767                 }
1768 rrs_checked:
1769                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1770                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1771                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1772                                 if (netif_msg_rx_err(adapter))
1773                                         dev_warn(&pdev->dev,
1774                                                 "wrong packet! rrs word3 is %x\n",
1775                                                 rrs->word3);
1776                         continue;
1777                 }
1778
1779                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1780                                 RRS_PKT_SIZE_MASK);
1781                 /* Good Receive */
1782                 if (likely(rfd_num == 1)) {
1783                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1784                                         RRS_RX_RFD_INDEX_MASK;
1785                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1786                         pci_unmap_single(pdev, buffer_info->dma,
1787                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1788                         skb = buffer_info->skb;
1789                 } else {
1790                         /* TODO */
1791                         if (netif_msg_rx_err(adapter))
1792                                 dev_warn(&pdev->dev,
1793                                         "Multi rfd not support yet!\n");
1794                         break;
1795                 }
1796                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1797                 skb_put(skb, length - ETH_FCS_LEN);
1798                 skb->protocol = eth_type_trans(skb, netdev);
1799                 atl1c_rx_checksum(adapter, skb, rrs);
1800                 if (rrs->word3 & RRS_VLAN_INS) {
1801                         u16 vlan;
1802
1803                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1804                         vlan = le16_to_cpu(vlan);
1805                         __vlan_hwaccel_put_tag(skb, vlan);
1806                 }
1807                 netif_receive_skb(skb);
1808
1809                 (*work_done)++;
1810                 count++;
1811         }
1812         if (count)
1813                 atl1c_alloc_rx_buffer(adapter);
1814 }
1815
1816 /*
1817  * atl1c_clean - NAPI Rx polling callback
1818  * @adapter: board private structure
1819  */
1820 static int atl1c_clean(struct napi_struct *napi, int budget)
1821 {
1822         struct atl1c_adapter *adapter =
1823                         container_of(napi, struct atl1c_adapter, napi);
1824         int work_done = 0;
1825
1826         /* Keep link state information with original netdev */
1827         if (!netif_carrier_ok(adapter->netdev))
1828                 goto quit_polling;
1829         /* just enable one RXQ */
1830         atl1c_clean_rx_irq(adapter, &work_done, budget);
1831
1832         if (work_done < budget) {
1833 quit_polling:
1834                 napi_complete(napi);
1835                 adapter->hw.intr_mask |= ISR_RX_PKT;
1836                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1837         }
1838         return work_done;
1839 }
1840
1841 #ifdef CONFIG_NET_POLL_CONTROLLER
1842
1843 /*
1844  * Polling 'interrupt' - used by things like netconsole to send skbs
1845  * without having to re-enable interrupts. It's not called while
1846  * the interrupt routine is executing.
1847  */
1848 static void atl1c_netpoll(struct net_device *netdev)
1849 {
1850         struct atl1c_adapter *adapter = netdev_priv(netdev);
1851
1852         disable_irq(adapter->pdev->irq);
1853         atl1c_intr(adapter->pdev->irq, netdev);
1854         enable_irq(adapter->pdev->irq);
1855 }
1856 #endif
1857
1858 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1859 {
1860         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1861         u16 next_to_use = 0;
1862         u16 next_to_clean = 0;
1863
1864         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1865         next_to_use   = tpd_ring->next_to_use;
1866
1867         return (u16)(next_to_clean > next_to_use) ?
1868                 (next_to_clean - next_to_use - 1) :
1869                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1870 }
1871
1872 /*
1873  * get next usable tpd
1874  * Note: should call atl1c_tdp_avail to make sure
1875  * there is enough tpd to use
1876  */
1877 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1878         enum atl1c_trans_queue type)
1879 {
1880         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1881         struct atl1c_tpd_desc *tpd_desc;
1882         u16 next_to_use = 0;
1883
1884         next_to_use = tpd_ring->next_to_use;
1885         if (++tpd_ring->next_to_use == tpd_ring->count)
1886                 tpd_ring->next_to_use = 0;
1887         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1888         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1889         return  tpd_desc;
1890 }
1891
1892 static struct atl1c_buffer *
1893 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1894 {
1895         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1896
1897         return &tpd_ring->buffer_info[tpd -
1898                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1899 }
1900
1901 /* Calculate the transmit packet descript needed*/
1902 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1903 {
1904         u16 tpd_req;
1905         u16 proto_hdr_len = 0;
1906
1907         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1908
1909         if (skb_is_gso(skb)) {
1910                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1911                 if (proto_hdr_len < skb_headlen(skb))
1912                         tpd_req++;
1913                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1914                         tpd_req++;
1915         }
1916         return tpd_req;
1917 }
1918
1919 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1920                           struct sk_buff *skb,
1921                           struct atl1c_tpd_desc **tpd,
1922                           enum atl1c_trans_queue type)
1923 {
1924         struct pci_dev *pdev = adapter->pdev;
1925         u8 hdr_len;
1926         u32 real_len;
1927         unsigned short offload_type;
1928         int err;
1929
1930         if (skb_is_gso(skb)) {
1931                 if (skb_header_cloned(skb)) {
1932                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1933                         if (unlikely(err))
1934                                 return -1;
1935                 }
1936                 offload_type = skb_shinfo(skb)->gso_type;
1937
1938                 if (offload_type & SKB_GSO_TCPV4) {
1939                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1940                                         + ntohs(ip_hdr(skb)->tot_len));
1941
1942                         if (real_len < skb->len)
1943                                 pskb_trim(skb, real_len);
1944
1945                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1946                         if (unlikely(skb->len == hdr_len)) {
1947                                 /* only xsum need */
1948                                 if (netif_msg_tx_queued(adapter))
1949                                         dev_warn(&pdev->dev,
1950                                                 "IPV4 tso with zero data??\n");
1951                                 goto check_sum;
1952                         } else {
1953                                 ip_hdr(skb)->check = 0;
1954                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1955                                                         ip_hdr(skb)->saddr,
1956                                                         ip_hdr(skb)->daddr,
1957                                                         0, IPPROTO_TCP, 0);
1958                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1959                         }
1960                 }
1961
1962                 if (offload_type & SKB_GSO_TCPV6) {
1963                         struct atl1c_tpd_ext_desc *etpd =
1964                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1965
1966                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1967                         *tpd = atl1c_get_tpd(adapter, type);
1968                         ipv6_hdr(skb)->payload_len = 0;
1969                         /* check payload == 0 byte ? */
1970                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1971                         if (unlikely(skb->len == hdr_len)) {
1972                                 /* only xsum need */
1973                                 if (netif_msg_tx_queued(adapter))
1974                                         dev_warn(&pdev->dev,
1975                                                 "IPV6 tso with zero data??\n");
1976                                 goto check_sum;
1977                         } else
1978                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1979                                                 &ipv6_hdr(skb)->saddr,
1980                                                 &ipv6_hdr(skb)->daddr,
1981                                                 0, IPPROTO_TCP, 0);
1982                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1983                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1984                         etpd->pkt_len = cpu_to_le32(skb->len);
1985                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1986                 }
1987
1988                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1989                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1990                                 TPD_TCPHDR_OFFSET_SHIFT;
1991                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1992                                 TPD_MSS_SHIFT;
1993                 return 0;
1994         }
1995
1996 check_sum:
1997         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1998                 u8 css, cso;
1999                 cso = skb_checksum_start_offset(skb);
2000
2001                 if (unlikely(cso & 0x1)) {
2002                         if (netif_msg_tx_err(adapter))
2003                                 dev_err(&adapter->pdev->dev,
2004                                         "payload offset should not an event number\n");
2005                         return -1;
2006                 } else {
2007                         css = cso + skb->csum_offset;
2008
2009                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2010                                         TPD_PLOADOFFSET_SHIFT;
2011                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2012                                         TPD_CCSUM_OFFSET_SHIFT;
2013                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2014                 }
2015         }
2016         return 0;
2017 }
2018
2019 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2020                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2021                         enum atl1c_trans_queue type)
2022 {
2023         struct atl1c_tpd_desc *use_tpd = NULL;
2024         struct atl1c_buffer *buffer_info = NULL;
2025         u16 buf_len = skb_headlen(skb);
2026         u16 map_len = 0;
2027         u16 mapped_len = 0;
2028         u16 hdr_len = 0;
2029         u16 nr_frags;
2030         u16 f;
2031         int tso;
2032
2033         nr_frags = skb_shinfo(skb)->nr_frags;
2034         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2035         if (tso) {
2036                 /* TSO */
2037                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2038                 use_tpd = tpd;
2039
2040                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2041                 buffer_info->length = map_len;
2042                 buffer_info->dma = pci_map_single(adapter->pdev,
2043                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2044                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2045                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2046                         ATL1C_PCIMAP_TODEVICE);
2047                 mapped_len += map_len;
2048                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2049                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2050         }
2051
2052         if (mapped_len < buf_len) {
2053                 /* mapped_len == 0, means we should use the first tpd,
2054                    which is given by caller  */
2055                 if (mapped_len == 0)
2056                         use_tpd = tpd;
2057                 else {
2058                         use_tpd = atl1c_get_tpd(adapter, type);
2059                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2060                 }
2061                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2062                 buffer_info->length = buf_len - mapped_len;
2063                 buffer_info->dma =
2064                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2065                                         buffer_info->length, PCI_DMA_TODEVICE);
2066                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2067                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2068                         ATL1C_PCIMAP_TODEVICE);
2069                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2070                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2071         }
2072
2073         for (f = 0; f < nr_frags; f++) {
2074                 struct skb_frag_struct *frag;
2075
2076                 frag = &skb_shinfo(skb)->frags[f];
2077
2078                 use_tpd = atl1c_get_tpd(adapter, type);
2079                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2080
2081                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2082                 buffer_info->length = skb_frag_size(frag);
2083                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2084                                                     frag, 0,
2085                                                     buffer_info->length,
2086                                                     DMA_TO_DEVICE);
2087                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2088                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2089                         ATL1C_PCIMAP_TODEVICE);
2090                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2091                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2092         }
2093
2094         /* The last tpd */
2095         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2096         /* The last buffer info contain the skb address,
2097            so it will be free after unmap */
2098         buffer_info->skb = skb;
2099 }
2100
2101 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2102                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2103 {
2104         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2105         u16 reg;
2106
2107         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2108         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2109 }
2110
2111 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2112                                           struct net_device *netdev)
2113 {
2114         struct atl1c_adapter *adapter = netdev_priv(netdev);
2115         unsigned long flags;
2116         u16 tpd_req = 1;
2117         struct atl1c_tpd_desc *tpd;
2118         enum atl1c_trans_queue type = atl1c_trans_normal;
2119
2120         if (test_bit(__AT_DOWN, &adapter->flags)) {
2121                 dev_kfree_skb_any(skb);
2122                 return NETDEV_TX_OK;
2123         }
2124
2125         tpd_req = atl1c_cal_tpd_req(skb);
2126         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2127                 if (netif_msg_pktdata(adapter))
2128                         dev_info(&adapter->pdev->dev, "tx locked\n");
2129                 return NETDEV_TX_LOCKED;
2130         }
2131
2132         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2133                 /* no enough descriptor, just stop queue */
2134                 netif_stop_queue(netdev);
2135                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2136                 return NETDEV_TX_BUSY;
2137         }
2138
2139         tpd = atl1c_get_tpd(adapter, type);
2140
2141         /* do TSO and check sum */
2142         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2143                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2144                 dev_kfree_skb_any(skb);
2145                 return NETDEV_TX_OK;
2146         }
2147
2148         if (unlikely(vlan_tx_tag_present(skb))) {
2149                 u16 vlan = vlan_tx_tag_get(skb);
2150                 __le16 tag;
2151
2152                 vlan = cpu_to_le16(vlan);
2153                 AT_VLAN_TO_TAG(vlan, tag);
2154                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2155                 tpd->vlan_tag = tag;
2156         }
2157
2158         if (skb_network_offset(skb) != ETH_HLEN)
2159                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2160
2161         atl1c_tx_map(adapter, skb, tpd, type);
2162         atl1c_tx_queue(adapter, skb, tpd, type);
2163
2164         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2165         return NETDEV_TX_OK;
2166 }
2167
2168 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2169 {
2170         struct net_device *netdev = adapter->netdev;
2171
2172         free_irq(adapter->pdev->irq, netdev);
2173
2174         if (adapter->have_msi)
2175                 pci_disable_msi(adapter->pdev);
2176 }
2177
2178 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2179 {
2180         struct pci_dev    *pdev   = adapter->pdev;
2181         struct net_device *netdev = adapter->netdev;
2182         int flags = 0;
2183         int err = 0;
2184
2185         adapter->have_msi = true;
2186         err = pci_enable_msi(adapter->pdev);
2187         if (err) {
2188                 if (netif_msg_ifup(adapter))
2189                         dev_err(&pdev->dev,
2190                                 "Unable to allocate MSI interrupt Error: %d\n",
2191                                 err);
2192                 adapter->have_msi = false;
2193         }
2194
2195         if (!adapter->have_msi)
2196                 flags |= IRQF_SHARED;
2197         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2198                         netdev->name, netdev);
2199         if (err) {
2200                 if (netif_msg_ifup(adapter))
2201                         dev_err(&pdev->dev,
2202                                 "Unable to allocate interrupt Error: %d\n",
2203                                 err);
2204                 if (adapter->have_msi)
2205                         pci_disable_msi(adapter->pdev);
2206                 return err;
2207         }
2208         if (netif_msg_ifup(adapter))
2209                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2210         return err;
2211 }
2212
2213
2214 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2215 {
2216         /* release tx-pending skbs and reset tx/rx ring index */
2217         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2218         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2219         atl1c_clean_rx_ring(adapter);
2220 }
2221
2222 static int atl1c_up(struct atl1c_adapter *adapter)
2223 {
2224         struct net_device *netdev = adapter->netdev;
2225         int err;
2226
2227         netif_carrier_off(netdev);
2228
2229         err = atl1c_configure(adapter);
2230         if (unlikely(err))
2231                 goto err_up;
2232
2233         err = atl1c_request_irq(adapter);
2234         if (unlikely(err))
2235                 goto err_up;
2236
2237         atl1c_check_link_status(adapter);
2238         clear_bit(__AT_DOWN, &adapter->flags);
2239         napi_enable(&adapter->napi);
2240         atl1c_irq_enable(adapter);
2241         netif_start_queue(netdev);
2242         return err;
2243
2244 err_up:
2245         atl1c_clean_rx_ring(adapter);
2246         return err;
2247 }
2248
2249 static void atl1c_down(struct atl1c_adapter *adapter)
2250 {
2251         struct net_device *netdev = adapter->netdev;
2252
2253         atl1c_del_timer(adapter);
2254         adapter->work_event = 0; /* clear all event */
2255         /* signal that we're down so the interrupt handler does not
2256          * reschedule our watchdog timer */
2257         set_bit(__AT_DOWN, &adapter->flags);
2258         netif_carrier_off(netdev);
2259         napi_disable(&adapter->napi);
2260         atl1c_irq_disable(adapter);
2261         atl1c_free_irq(adapter);
2262         /* disable ASPM if device inactive */
2263         atl1c_disable_l0s_l1(&adapter->hw);
2264         /* reset MAC to disable all RX/TX */
2265         atl1c_reset_mac(&adapter->hw);
2266         msleep(1);
2267
2268         adapter->link_speed = SPEED_0;
2269         adapter->link_duplex = -1;
2270         atl1c_reset_dma_ring(adapter);
2271 }
2272
2273 /*
2274  * atl1c_open - Called when a network interface is made active
2275  * @netdev: network interface device structure
2276  *
2277  * Returns 0 on success, negative value on failure
2278  *
2279  * The open entry point is called when a network interface is made
2280  * active by the system (IFF_UP).  At this point all resources needed
2281  * for transmit and receive operations are allocated, the interrupt
2282  * handler is registered with the OS, the watchdog timer is started,
2283  * and the stack is notified that the interface is ready.
2284  */
2285 static int atl1c_open(struct net_device *netdev)
2286 {
2287         struct atl1c_adapter *adapter = netdev_priv(netdev);
2288         int err;
2289
2290         /* disallow open during test */
2291         if (test_bit(__AT_TESTING, &adapter->flags))
2292                 return -EBUSY;
2293
2294         /* allocate rx/tx dma buffer & descriptors */
2295         err = atl1c_setup_ring_resources(adapter);
2296         if (unlikely(err))
2297                 return err;
2298
2299         err = atl1c_up(adapter);
2300         if (unlikely(err))
2301                 goto err_up;
2302
2303         return 0;
2304
2305 err_up:
2306         atl1c_free_irq(adapter);
2307         atl1c_free_ring_resources(adapter);
2308         atl1c_reset_mac(&adapter->hw);
2309         return err;
2310 }
2311
2312 /*
2313  * atl1c_close - Disables a network interface
2314  * @netdev: network interface device structure
2315  *
2316  * Returns 0, this is not allowed to fail
2317  *
2318  * The close entry point is called when an interface is de-activated
2319  * by the OS.  The hardware is still under the drivers control, but
2320  * needs to be disabled.  A global MAC reset is issued to stop the
2321  * hardware, and all transmit and receive resources are freed.
2322  */
2323 static int atl1c_close(struct net_device *netdev)
2324 {
2325         struct atl1c_adapter *adapter = netdev_priv(netdev);
2326
2327         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2328         set_bit(__AT_DOWN, &adapter->flags);
2329         cancel_work_sync(&adapter->common_task);
2330         atl1c_down(adapter);
2331         atl1c_free_ring_resources(adapter);
2332         return 0;
2333 }
2334
2335 static int atl1c_suspend(struct device *dev)
2336 {
2337         struct pci_dev *pdev = to_pci_dev(dev);
2338         struct net_device *netdev = pci_get_drvdata(pdev);
2339         struct atl1c_adapter *adapter = netdev_priv(netdev);
2340         struct atl1c_hw *hw = &adapter->hw;
2341         u32 wufc = adapter->wol;
2342
2343         atl1c_disable_l0s_l1(hw);
2344         if (netif_running(netdev)) {
2345                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2346                 atl1c_down(adapter);
2347         }
2348         netif_device_detach(netdev);
2349
2350         if (wufc)
2351                 if (atl1c_phy_to_ps_link(hw) != 0)
2352                         dev_dbg(&pdev->dev, "phy power saving failed");
2353
2354         atl1c_power_saving(hw, wufc);
2355
2356         return 0;
2357 }
2358
2359 #ifdef CONFIG_PM_SLEEP
2360 static int atl1c_resume(struct device *dev)
2361 {
2362         struct pci_dev *pdev = to_pci_dev(dev);
2363         struct net_device *netdev = pci_get_drvdata(pdev);
2364         struct atl1c_adapter *adapter = netdev_priv(netdev);
2365
2366         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2367         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2368
2369         atl1c_phy_reset(&adapter->hw);
2370         atl1c_reset_mac(&adapter->hw);
2371         atl1c_phy_init(&adapter->hw);
2372
2373 #if 0
2374         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2375         pm_data &= ~PM_CTRLSTAT_PME_EN;
2376         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2377 #endif
2378
2379         netif_device_attach(netdev);
2380         if (netif_running(netdev))
2381                 atl1c_up(adapter);
2382
2383         return 0;
2384 }
2385 #endif
2386
2387 static void atl1c_shutdown(struct pci_dev *pdev)
2388 {
2389         struct net_device *netdev = pci_get_drvdata(pdev);
2390         struct atl1c_adapter *adapter = netdev_priv(netdev);
2391
2392         atl1c_suspend(&pdev->dev);
2393         pci_wake_from_d3(pdev, adapter->wol);
2394         pci_set_power_state(pdev, PCI_D3hot);
2395 }
2396
2397 static const struct net_device_ops atl1c_netdev_ops = {
2398         .ndo_open               = atl1c_open,
2399         .ndo_stop               = atl1c_close,
2400         .ndo_validate_addr      = eth_validate_addr,
2401         .ndo_start_xmit         = atl1c_xmit_frame,
2402         .ndo_set_mac_address    = atl1c_set_mac_addr,
2403         .ndo_set_rx_mode        = atl1c_set_multi,
2404         .ndo_change_mtu         = atl1c_change_mtu,
2405         .ndo_fix_features       = atl1c_fix_features,
2406         .ndo_set_features       = atl1c_set_features,
2407         .ndo_do_ioctl           = atl1c_ioctl,
2408         .ndo_tx_timeout         = atl1c_tx_timeout,
2409         .ndo_get_stats          = atl1c_get_stats,
2410 #ifdef CONFIG_NET_POLL_CONTROLLER
2411         .ndo_poll_controller    = atl1c_netpoll,
2412 #endif
2413 };
2414
2415 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2416 {
2417         SET_NETDEV_DEV(netdev, &pdev->dev);
2418         pci_set_drvdata(pdev, netdev);
2419
2420         netdev->netdev_ops = &atl1c_netdev_ops;
2421         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2422         atl1c_set_ethtool_ops(netdev);
2423
2424         /* TODO: add when ready */
2425         netdev->hw_features =   NETIF_F_SG         |
2426                                 NETIF_F_HW_CSUM    |
2427                                 NETIF_F_HW_VLAN_RX |
2428                                 NETIF_F_TSO        |
2429                                 NETIF_F_TSO6;
2430         netdev->features =      netdev->hw_features |
2431                                 NETIF_F_HW_VLAN_TX;
2432         return 0;
2433 }
2434
2435 /*
2436  * atl1c_probe - Device Initialization Routine
2437  * @pdev: PCI device information struct
2438  * @ent: entry in atl1c_pci_tbl
2439  *
2440  * Returns 0 on success, negative on failure
2441  *
2442  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2443  * The OS initialization, configuring of the adapter private structure,
2444  * and a hardware reset occur.
2445  */
2446 static int __devinit atl1c_probe(struct pci_dev *pdev,
2447                                  const struct pci_device_id *ent)
2448 {
2449         struct net_device *netdev;
2450         struct atl1c_adapter *adapter;
2451         static int cards_found;
2452
2453         int err = 0;
2454
2455         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2456         err = pci_enable_device_mem(pdev);
2457         if (err) {
2458                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2459                 return err;
2460         }
2461
2462         /*
2463          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2464          * shared register for the high 32 bits, so only a single, aligned,
2465          * 4 GB physical address range can be used at a time.
2466          *
2467          * Supporting 64-bit DMA on this hardware is more trouble than it's
2468          * worth.  It is far easier to limit to 32-bit DMA than update
2469          * various kernel subsystems to support the mechanics required by a
2470          * fixed-high-32-bit system.
2471          */
2472         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2473             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2474                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2475                 goto err_dma;
2476         }
2477
2478         err = pci_request_regions(pdev, atl1c_driver_name);
2479         if (err) {
2480                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2481                 goto err_pci_reg;
2482         }
2483
2484         pci_set_master(pdev);
2485
2486         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2487         if (netdev == NULL) {
2488                 err = -ENOMEM;
2489                 goto err_alloc_etherdev;
2490         }
2491
2492         err = atl1c_init_netdev(netdev, pdev);
2493         if (err) {
2494                 dev_err(&pdev->dev, "init netdevice failed\n");
2495                 goto err_init_netdev;
2496         }
2497         adapter = netdev_priv(netdev);
2498         adapter->bd_number = cards_found;
2499         adapter->netdev = netdev;
2500         adapter->pdev = pdev;
2501         adapter->hw.adapter = adapter;
2502         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2503         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2504         if (!adapter->hw.hw_addr) {
2505                 err = -EIO;
2506                 dev_err(&pdev->dev, "cannot map device registers\n");
2507                 goto err_ioremap;
2508         }
2509
2510         /* init mii data */
2511         adapter->mii.dev = netdev;
2512         adapter->mii.mdio_read  = atl1c_mdio_read;
2513         adapter->mii.mdio_write = atl1c_mdio_write;
2514         adapter->mii.phy_id_mask = 0x1f;
2515         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2516         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2517         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2518                         (unsigned long)adapter);
2519         /* setup the private structure */
2520         err = atl1c_sw_init(adapter);
2521         if (err) {
2522                 dev_err(&pdev->dev, "net device private data init failed\n");
2523                 goto err_sw_init;
2524         }
2525         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2526
2527         /* Init GPHY as early as possible due to power saving issue  */
2528         atl1c_phy_reset(&adapter->hw);
2529
2530         err = atl1c_reset_mac(&adapter->hw);
2531         if (err) {
2532                 err = -EIO;
2533                 goto err_reset;
2534         }
2535
2536         /* reset the controller to
2537          * put the device in a known good starting state */
2538         err = atl1c_phy_init(&adapter->hw);
2539         if (err) {
2540                 err = -EIO;
2541                 goto err_reset;
2542         }
2543         if (atl1c_read_mac_addr(&adapter->hw)) {
2544                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2545                 netdev->addr_assign_type |= NET_ADDR_RANDOM;
2546         }
2547         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2548         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2549         if (netif_msg_probe(adapter))
2550                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2551                         adapter->hw.mac_addr);
2552
2553         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2554         INIT_WORK(&adapter->common_task, atl1c_common_task);
2555         adapter->work_event = 0;
2556         err = register_netdev(netdev);
2557         if (err) {
2558                 dev_err(&pdev->dev, "register netdevice failed\n");
2559                 goto err_register;
2560         }
2561
2562         if (netif_msg_probe(adapter))
2563                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2564         cards_found++;
2565         return 0;
2566
2567 err_reset:
2568 err_register:
2569 err_sw_init:
2570         iounmap(adapter->hw.hw_addr);
2571 err_init_netdev:
2572 err_ioremap:
2573         free_netdev(netdev);
2574 err_alloc_etherdev:
2575         pci_release_regions(pdev);
2576 err_pci_reg:
2577 err_dma:
2578         pci_disable_device(pdev);
2579         return err;
2580 }
2581
2582 /*
2583  * atl1c_remove - Device Removal Routine
2584  * @pdev: PCI device information struct
2585  *
2586  * atl1c_remove is called by the PCI subsystem to alert the driver
2587  * that it should release a PCI device.  The could be caused by a
2588  * Hot-Plug event, or because the driver is going to be removed from
2589  * memory.
2590  */
2591 static void __devexit atl1c_remove(struct pci_dev *pdev)
2592 {
2593         struct net_device *netdev = pci_get_drvdata(pdev);
2594         struct atl1c_adapter *adapter = netdev_priv(netdev);
2595
2596         unregister_netdev(netdev);
2597         /* restore permanent address */
2598         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2599         atl1c_phy_disable(&adapter->hw);
2600
2601         iounmap(adapter->hw.hw_addr);
2602
2603         pci_release_regions(pdev);
2604         pci_disable_device(pdev);
2605         free_netdev(netdev);
2606 }
2607
2608 /*
2609  * atl1c_io_error_detected - called when PCI error is detected
2610  * @pdev: Pointer to PCI device
2611  * @state: The current pci connection state
2612  *
2613  * This function is called after a PCI bus error affecting
2614  * this device has been detected.
2615  */
2616 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2617                                                 pci_channel_state_t state)
2618 {
2619         struct net_device *netdev = pci_get_drvdata(pdev);
2620         struct atl1c_adapter *adapter = netdev_priv(netdev);
2621
2622         netif_device_detach(netdev);
2623
2624         if (state == pci_channel_io_perm_failure)
2625                 return PCI_ERS_RESULT_DISCONNECT;
2626
2627         if (netif_running(netdev))
2628                 atl1c_down(adapter);
2629
2630         pci_disable_device(pdev);
2631
2632         /* Request a slot slot reset. */
2633         return PCI_ERS_RESULT_NEED_RESET;
2634 }
2635
2636 /*
2637  * atl1c_io_slot_reset - called after the pci bus has been reset.
2638  * @pdev: Pointer to PCI device
2639  *
2640  * Restart the card from scratch, as if from a cold-boot. Implementation
2641  * resembles the first-half of the e1000_resume routine.
2642  */
2643 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2644 {
2645         struct net_device *netdev = pci_get_drvdata(pdev);
2646         struct atl1c_adapter *adapter = netdev_priv(netdev);
2647
2648         if (pci_enable_device(pdev)) {
2649                 if (netif_msg_hw(adapter))
2650                         dev_err(&pdev->dev,
2651                                 "Cannot re-enable PCI device after reset\n");
2652                 return PCI_ERS_RESULT_DISCONNECT;
2653         }
2654         pci_set_master(pdev);
2655
2656         pci_enable_wake(pdev, PCI_D3hot, 0);
2657         pci_enable_wake(pdev, PCI_D3cold, 0);
2658
2659         atl1c_reset_mac(&adapter->hw);
2660
2661         return PCI_ERS_RESULT_RECOVERED;
2662 }
2663
2664 /*
2665  * atl1c_io_resume - called when traffic can start flowing again.
2666  * @pdev: Pointer to PCI device
2667  *
2668  * This callback is called when the error recovery driver tells us that
2669  * its OK to resume normal operation. Implementation resembles the
2670  * second-half of the atl1c_resume routine.
2671  */
2672 static void atl1c_io_resume(struct pci_dev *pdev)
2673 {
2674         struct net_device *netdev = pci_get_drvdata(pdev);
2675         struct atl1c_adapter *adapter = netdev_priv(netdev);
2676
2677         if (netif_running(netdev)) {
2678                 if (atl1c_up(adapter)) {
2679                         if (netif_msg_hw(adapter))
2680                                 dev_err(&pdev->dev,
2681                                         "Cannot bring device back up after reset\n");
2682                         return;
2683                 }
2684         }
2685
2686         netif_device_attach(netdev);
2687 }
2688
2689 static struct pci_error_handlers atl1c_err_handler = {
2690         .error_detected = atl1c_io_error_detected,
2691         .slot_reset = atl1c_io_slot_reset,
2692         .resume = atl1c_io_resume,
2693 };
2694
2695 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2696
2697 static struct pci_driver atl1c_driver = {
2698         .name     = atl1c_driver_name,
2699         .id_table = atl1c_pci_tbl,
2700         .probe    = atl1c_probe,
2701         .remove   = __devexit_p(atl1c_remove),
2702         .shutdown = atl1c_shutdown,
2703         .err_handler = &atl1c_err_handler,
2704         .driver.pm = &atl1c_pm_ops,
2705 };
2706
2707 /*
2708  * atl1c_init_module - Driver Registration Routine
2709  *
2710  * atl1c_init_module is the first routine called when the driver is
2711  * loaded. All it does is register with the PCI subsystem.
2712  */
2713 static int __init atl1c_init_module(void)
2714 {
2715         return pci_register_driver(&atl1c_driver);
2716 }
2717
2718 /*
2719  * atl1c_exit_module - Driver Exit Cleanup Routine
2720  *
2721  * atl1c_exit_module is called just before the driver is removed
2722  * from memory.
2723  */
2724 static void __exit atl1c_exit_module(void)
2725 {
2726         pci_unregister_driver(&atl1c_driver);
2727 }
2728
2729 module_init(atl1c_init_module);
2730 module_exit(atl1c_exit_module);