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

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