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