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 "1.0.1.1-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         pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
 153                         PCI_EXP_DEVSTA_NFED |
 154                         PCI_EXP_DEVSTA_FED |
 155                         PCI_EXP_DEVSTA_CED |
 156                         PCI_EXP_DEVSTA_URD);
 157
 158         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 159         data &= ~LTSSM_ID_EN_WRO;
 160         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 161
 162         atl1c_pcie_patch(hw);
 163         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 164                 atl1c_disable_l0s_l1(hw);
 165
 166         msleep(5);
 167 }
 168
 169 /**
 170  * atl1c_irq_enable - Enable default interrupt generation settings
 171  * @adapter: board private structure
 172  */
 173 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 174 {
 175         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 176                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 177                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 178                 AT_WRITE_FLUSH(&adapter->hw);
 179         }
 180 }
 181
 182 /**
 183  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 184  * @adapter: board private structure
 185  */
 186 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 187 {
 188         atomic_inc(&adapter->irq_sem);
 189         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 190         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 191         AT_WRITE_FLUSH(&adapter->hw);
 192         synchronize_irq(adapter->pdev->irq);
 193 }
 194
 195 /**
 196  * atl1c_irq_reset - reset interrupt confiure on the NIC
 197  * @adapter: board private structure
 198  */
 199 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 200 {
 201         atomic_set(&adapter->irq_sem, 1);
 202         atl1c_irq_enable(adapter);
 203 }
 204
 205 /*
 206  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 207  * of the idle status register until the device is actually idle
 208  */
 209 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
 210 {
 211         int timeout;
 212         u32 data;
 213
 214         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 215                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 216                 if ((data & modu_ctrl) == 0)
 217                         return 0;
 218                 msleep(1);
 219         }
 220         return data;
 221 }
 222
 223 /**
 224  * atl1c_phy_config - Timer Call-back
 225  * @data: pointer to netdev cast into an unsigned long
 226  */
 227 static void atl1c_phy_config(unsigned long data)
 228 {
 229         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 230         struct atl1c_hw *hw = &adapter->hw;
 231         unsigned long flags;
 232
 233         spin_lock_irqsave(&adapter->mdio_lock, flags);
 234         atl1c_restart_autoneg(hw);
 235         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 236 }
 237
 238 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 239 {
 240         WARN_ON(in_interrupt());
 241         atl1c_down(adapter);
 242         atl1c_up(adapter);
 243         clear_bit(__AT_RESETTING, &adapter->flags);
 244 }
 245
 246 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 247 {
 248         struct atl1c_hw *hw = &adapter->hw;
 249         struct net_device *netdev = adapter->netdev;
 250         struct pci_dev    *pdev   = adapter->pdev;
 251         int err;
 252         unsigned long flags;
 253         u16 speed, duplex, phy_data;
 254
 255         spin_lock_irqsave(&adapter->mdio_lock, flags);
 256         /* MII_BMSR must read twise */
 257         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 258         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 259         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 260
 261         if ((phy_data & BMSR_LSTATUS) == 0) {
 262                 /* link down */
 263                 netif_carrier_off(netdev);
 264                 hw->hibernate = true;
 265                 if (atl1c_reset_mac(hw) != 0)
 266                         if (netif_msg_hw(adapter))
 267                                 dev_warn(&pdev->dev, "reset mac failed\n");
 268                 atl1c_set_aspm(hw, SPEED_0);
 269                 atl1c_post_phy_linkchg(hw, SPEED_0);
 270                 atl1c_reset_dma_ring(adapter);
 271                 atl1c_configure(adapter);
 272         } else {
 273                 /* Link Up */
 274                 hw->hibernate = false;
 275                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 276                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 277                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 278                 if (unlikely(err))
 279                         return;
 280                 /* link result is our setting */
 281                 if (adapter->link_speed != speed ||
 282                     adapter->link_duplex != duplex) {
 283                         adapter->link_speed  = speed;
 284                         adapter->link_duplex = duplex;
 285                         atl1c_set_aspm(hw, speed);
 286                         atl1c_post_phy_linkchg(hw, speed);
 287                         atl1c_start_mac(adapter);
 288                         if (netif_msg_link(adapter))
 289                                 dev_info(&pdev->dev,
 290                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 291                                         atl1c_driver_name, netdev->name,
 292                                         adapter->link_speed,
 293                                         adapter->link_duplex == FULL_DUPLEX ?
 294                                         "Full Duplex" : "Half Duplex");
 295                 }
 296                 if (!netif_carrier_ok(netdev))
 297                         netif_carrier_on(netdev);
 298         }
 299 }
 300
 301 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 302 {
 303         struct net_device *netdev = adapter->netdev;
 304         struct pci_dev    *pdev   = adapter->pdev;
 305         u16 phy_data;
 306         u16 link_up;
 307
 308         spin_lock(&adapter->mdio_lock);
 309         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 310         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 311         spin_unlock(&adapter->mdio_lock);
 312         link_up = phy_data & BMSR_LSTATUS;
 313         /* notify upper layer link down ASAP */
 314         if (!link_up) {
 315                 if (netif_carrier_ok(netdev)) {
 316                         /* old link state: Up */
 317                         netif_carrier_off(netdev);
 318                         if (netif_msg_link(adapter))
 319                                 dev_info(&pdev->dev,
 320                                         "%s: %s NIC Link is Down\n",
 321                                         atl1c_driver_name, netdev->name);
 322                         adapter->link_speed = SPEED_0;
 323                 }
 324         }
 325
 326         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 327         schedule_work(&adapter->common_task);
 328 }
 329
 330 static void atl1c_common_task(struct work_struct *work)
 331 {
 332         struct atl1c_adapter *adapter;
 333         struct net_device *netdev;
 334
 335         adapter = container_of(work, struct atl1c_adapter, common_task);
 336         netdev = adapter->netdev;
 337
 338         if (test_bit(__AT_DOWN, &adapter->flags))
 339                 return;
 340
 341         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 342                 netif_device_detach(netdev);
 343                 atl1c_down(adapter);
 344                 atl1c_up(adapter);
 345                 netif_device_attach(netdev);
 346         }
 347
 348         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 349                 &adapter->work_event)) {
 350                 atl1c_irq_disable(adapter);
 351                 atl1c_check_link_status(adapter);
 352                 atl1c_irq_enable(adapter);
 353         }
 354 }
 355
 356
 357 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 358 {
 359         del_timer_sync(&adapter->phy_config_timer);
 360 }
 361
 362
 363 /**
 364  * atl1c_tx_timeout - Respond to a Tx Hang
 365  * @netdev: network interface device structure
 366  */
 367 static void atl1c_tx_timeout(struct net_device *netdev)
 368 {
 369         struct atl1c_adapter *adapter = netdev_priv(netdev);
 370
 371         /* Do the reset outside of interrupt context */
 372         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 373         schedule_work(&adapter->common_task);
 374 }
 375
 376 /**
 377  * atl1c_set_multi - Multicast and Promiscuous mode set
 378  * @netdev: network interface device structure
 379  *
 380  * The set_multi entry point is called whenever the multicast address
 381  * list or the network interface flags are updated.  This routine is
 382  * responsible for configuring the hardware for proper multicast,
 383  * promiscuous mode, and all-multi behavior.
 384  */
 385 static void atl1c_set_multi(struct net_device *netdev)
 386 {
 387         struct atl1c_adapter *adapter = netdev_priv(netdev);
 388         struct atl1c_hw *hw = &adapter->hw;
 389         struct netdev_hw_addr *ha;
 390         u32 mac_ctrl_data;
 391         u32 hash_value;
 392
 393         /* Check for Promiscuous and All Multicast modes */
 394         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 395
 396         if (netdev->flags & IFF_PROMISC) {
 397                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 398         } else if (netdev->flags & IFF_ALLMULTI) {
 399                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 400                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 401         } else {
 402                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 403         }
 404
 405         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 406
 407         /* clear the old settings from the multicast hash table */
 408         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 409         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 410
 411         /* comoute mc addresses' hash value ,and put it into hash table */
 412         netdev_for_each_mc_addr(ha, netdev) {
 413                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 414                 atl1c_hash_set(hw, hash_value);
 415         }
 416 }
 417
 418 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 419 {
 420         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 421                 /* enable VLAN tag insert/strip */
 422                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 423         } else {
 424                 /* disable VLAN tag insert/strip */
 425                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 426         }
 427 }
 428
 429 static void atl1c_vlan_mode(struct net_device *netdev,
 430         netdev_features_t features)
 431 {
 432         struct atl1c_adapter *adapter = netdev_priv(netdev);
 433         struct pci_dev *pdev = adapter->pdev;
 434         u32 mac_ctrl_data = 0;
 435
 436         if (netif_msg_pktdata(adapter))
 437                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 438
 439         atl1c_irq_disable(adapter);
 440         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 441         __atl1c_vlan_mode(features, &mac_ctrl_data);
 442         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 443         atl1c_irq_enable(adapter);
 444 }
 445
 446 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 447 {
 448         struct pci_dev *pdev = adapter->pdev;
 449
 450         if (netif_msg_pktdata(adapter))
 451                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 452         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 453 }
 454
 455 /**
 456  * atl1c_set_mac - Change the Ethernet Address of the NIC
 457  * @netdev: network interface device structure
 458  * @p: pointer to an address structure
 459  *
 460  * Returns 0 on success, negative on failure
 461  */
 462 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 463 {
 464         struct atl1c_adapter *adapter = netdev_priv(netdev);
 465         struct sockaddr *addr = p;
 466
 467         if (!is_valid_ether_addr(addr->sa_data))
 468                 return -EADDRNOTAVAIL;
 469
 470         if (netif_running(netdev))
 471                 return -EBUSY;
 472
 473         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 474         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 475
 476         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
 477
 478         return 0;
 479 }
 480
 481 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 482                                 struct net_device *dev)
 483 {
 484         int mtu = dev->mtu;
 485
 486         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 487                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 488 }
 489
 490 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 491         netdev_features_t features)
 492 {
 493         /*
 494          * Since there is no support for separate rx/tx vlan accel
 495          * enable/disable make sure tx flag is always in same state as rx.
 496          */
 497         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 498                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 499         else
 500                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 501
 502         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 503                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 504
 505         return features;
 506 }
 507
 508 static int atl1c_set_features(struct net_device *netdev,
 509         netdev_features_t features)
 510 {
 511         netdev_features_t changed = netdev->features ^ features;
 512
 513         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 514                 atl1c_vlan_mode(netdev, features);
 515
 516         return 0;
 517 }
 518
 519 /**
 520  * atl1c_change_mtu - Change the Maximum Transfer Unit
 521  * @netdev: network interface device structure
 522  * @new_mtu: new value for maximum frame size
 523  *
 524  * Returns 0 on success, negative on failure
 525  */
 526 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 527 {
 528         struct atl1c_adapter *adapter = netdev_priv(netdev);
 529         struct atl1c_hw *hw = &adapter->hw;
 530         int old_mtu   = netdev->mtu;
 531         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 532
 533         /* Fast Ethernet controller doesn't support jumbo packet */
 534         if (((hw->nic_type == athr_l2c ||
 535               hw->nic_type == athr_l2c_b ||
 536               hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
 537               max_frame < ETH_ZLEN + ETH_FCS_LEN ||
 538               max_frame > MAX_JUMBO_FRAME_SIZE) {
 539                 if (netif_msg_link(adapter))
 540                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 541                 return -EINVAL;
 542         }
 543         /* set MTU */
 544         if (old_mtu != new_mtu && netif_running(netdev)) {
 545                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 546                         msleep(1);
 547                 netdev->mtu = new_mtu;
 548                 adapter->hw.max_frame_size = new_mtu;
 549                 atl1c_set_rxbufsize(adapter, netdev);
 550                 atl1c_down(adapter);
 551                 netdev_update_features(netdev);
 552                 atl1c_up(adapter);
 553                 clear_bit(__AT_RESETTING, &adapter->flags);
 554         }
 555         return 0;
 556 }
 557
 558 /*
 559  *  caller should hold mdio_lock
 560  */
 561 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 562 {
 563         struct atl1c_adapter *adapter = netdev_priv(netdev);
 564         u16 result;
 565
 566         atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
 567         return result;
 568 }
 569
 570 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 571                              int reg_num, int val)
 572 {
 573         struct atl1c_adapter *adapter = netdev_priv(netdev);
 574
 575         atl1c_write_phy_reg(&adapter->hw, reg_num, val);
 576 }
 577
 578 static int atl1c_mii_ioctl(struct net_device *netdev,
 579                            struct ifreq *ifr, int cmd)
 580 {
 581         struct atl1c_adapter *adapter = netdev_priv(netdev);
 582         struct pci_dev *pdev = adapter->pdev;
 583         struct mii_ioctl_data *data = if_mii(ifr);
 584         unsigned long flags;
 585         int retval = 0;
 586
 587         if (!netif_running(netdev))
 588                 return -EINVAL;
 589
 590         spin_lock_irqsave(&adapter->mdio_lock, flags);
 591         switch (cmd) {
 592         case SIOCGMIIPHY:
 593                 data->phy_id = 0;
 594                 break;
 595
 596         case SIOCGMIIREG:
 597                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 598                                     &data->val_out)) {
 599                         retval = -EIO;
 600                         goto out;
 601                 }
 602                 break;
 603
 604         case SIOCSMIIREG:
 605                 if (data->reg_num & ~(0x1F)) {
 606                         retval = -EFAULT;
 607                         goto out;
 608                 }
 609
 610                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 611                                 data->reg_num, data->val_in);
 612                 if (atl1c_write_phy_reg(&adapter->hw,
 613                                      data->reg_num, data->val_in)) {
 614                         retval = -EIO;
 615                         goto out;
 616                 }
 617                 break;
 618
 619         default:
 620                 retval = -EOPNOTSUPP;
 621                 break;
 622         }
 623 out:
 624         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 625         return retval;
 626 }
 627
 628 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 629 {
 630         switch (cmd) {
 631         case SIOCGMIIPHY:
 632         case SIOCGMIIREG:
 633         case SIOCSMIIREG:
 634                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 635         default:
 636                 return -EOPNOTSUPP;
 637         }
 638 }
 639
 640 /**
 641  * atl1c_alloc_queues - Allocate memory for all rings
 642  * @adapter: board private structure to initialize
 643  *
 644  */
 645 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
 646 {
 647         return 0;
 648 }
 649
 650 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 651 {
 652         switch (hw->device_id) {
 653         case PCI_DEVICE_ID_ATTANSIC_L2C:
 654                 hw->nic_type = athr_l2c;
 655                 break;
 656         case PCI_DEVICE_ID_ATTANSIC_L1C:
 657                 hw->nic_type = athr_l1c;
 658                 break;
 659         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 660                 hw->nic_type = athr_l2c_b;
 661                 break;
 662         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 663                 hw->nic_type = athr_l2c_b2;
 664                 break;
 665         case PCI_DEVICE_ID_ATHEROS_L1D:
 666                 hw->nic_type = athr_l1d;
 667                 break;
 668         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 669                 hw->nic_type = athr_l1d_2;
 670                 break;
 671         default:
 672                 break;
 673         }
 674 }
 675
 676 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 677 {
 678         u32 link_ctrl_data;
 679
 680         atl1c_set_mac_type(hw);
 681         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 682
 683         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 684                          ATL1C_TXQ_MODE_ENHANCE;
 685         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 686                           ATL1C_ASPM_L1_SUPPORT;
 687         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 688
 689         if (hw->nic_type == athr_l1c ||
 690             hw->nic_type == athr_l1d ||
 691             hw->nic_type == athr_l1d_2)
 692                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 693         return 0;
 694 }
 695
 696 struct atl1c_platform_patch {
 697         u16 pci_did;
 698         u8  pci_revid;
 699         u16 subsystem_vid;
 700         u16 subsystem_did;
 701         u32 patch_flag;
 702 #define ATL1C_LINK_PATCH        0x1
 703 };
 704 static const struct atl1c_platform_patch plats[] = {
 705 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
 706 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
 707 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
 708 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
 709 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
 710 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
 711 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
 712 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
 713 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
 714 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
 715 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
 716 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
 717 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
 718 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
 719 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
 720 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
 721 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
 722 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
 723 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
 724 {0},
 725 };
 726
 727 static void atl1c_patch_assign(struct atl1c_hw *hw)
 728 {
 729         struct pci_dev  *pdev = hw->adapter->pdev;
 730         u32 misc_ctrl;
 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         if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
 747             hw->revision_id == L2CB_V21) {
 748                 /* config acess mode */
 749                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 750                                        REG_PCIE_DEV_MISC_CTRL);
 751                 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
 752                 misc_ctrl &= ~0x100;
 753                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 754                                        REG_PCIE_DEV_MISC_CTRL);
 755                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
 756         }
 757 }
 758 /**
 759  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 760  * @adapter: board private structure to initialize
 761  *
 762  * atl1c_sw_init initializes the Adapter private data structure.
 763  * Fields are initialized based on PCI device information and
 764  * OS network device settings (MTU size).
 765  */
 766 static int atl1c_sw_init(struct atl1c_adapter *adapter)
 767 {
 768         struct atl1c_hw *hw   = &adapter->hw;
 769         struct pci_dev  *pdev = adapter->pdev;
 770         u32 revision;
 771
 772
 773         adapter->wol = 0;
 774         device_set_wakeup_enable(&pdev->dev, false);
 775         adapter->link_speed = SPEED_0;
 776         adapter->link_duplex = FULL_DUPLEX;
 777         adapter->tpd_ring[0].count = 1024;
 778         adapter->rfd_ring.count = 512;
 779
 780         hw->vendor_id = pdev->vendor;
 781         hw->device_id = pdev->device;
 782         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 783         hw->subsystem_id = pdev->subsystem_device;
 784         pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
 785         hw->revision_id = revision & 0xFF;
 786         /* before link up, we assume hibernate is true */
 787         hw->hibernate = true;
 788         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 789         if (atl1c_setup_mac_funcs(hw) != 0) {
 790                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 791                 return -1;
 792         }
 793         atl1c_patch_assign(hw);
 794
 795         hw->intr_mask = IMR_NORMAL_MASK;
 796         hw->phy_configured = false;
 797         hw->preamble_len = 7;
 798         hw->max_frame_size = adapter->netdev->mtu;
 799         hw->autoneg_advertised = ADVERTISED_Autoneg;
 800         hw->indirect_tab = 0xE4E4E4E4;
 801         hw->base_cpu = 0;
 802
 803         hw->ict = 50000;                /* 100ms */
 804         hw->smb_timer = 200000;         /* 400ms */
 805         hw->rx_imt = 200;
 806         hw->tx_imt = 1000;
 807
 808         hw->tpd_burst = 5;
 809         hw->rfd_burst = 8;
 810         hw->dma_order = atl1c_dma_ord_out;
 811         hw->dmar_block = atl1c_dma_req_1024;
 812
 813         if (atl1c_alloc_queues(adapter)) {
 814                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 815                 return -ENOMEM;
 816         }
 817         /* TODO */
 818         atl1c_set_rxbufsize(adapter, adapter->netdev);
 819         atomic_set(&adapter->irq_sem, 1);
 820         spin_lock_init(&adapter->mdio_lock);
 821         spin_lock_init(&adapter->tx_lock);
 822         set_bit(__AT_DOWN, &adapter->flags);
 823
 824         return 0;
 825 }
 826
 827 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 828                                 struct atl1c_buffer *buffer_info, int in_irq)
 829 {
 830         u16 pci_driection;
 831         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 832                 return;
 833         if (buffer_info->dma) {
 834                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 835                         pci_driection = PCI_DMA_FROMDEVICE;
 836                 else
 837                         pci_driection = PCI_DMA_TODEVICE;
 838
 839                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 840                         pci_unmap_single(pdev, buffer_info->dma,
 841                                         buffer_info->length, pci_driection);
 842                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 843                         pci_unmap_page(pdev, buffer_info->dma,
 844                                         buffer_info->length, pci_driection);
 845         }
 846         if (buffer_info->skb) {
 847                 if (in_irq)
 848                         dev_kfree_skb_irq(buffer_info->skb);
 849                 else
 850                         dev_kfree_skb(buffer_info->skb);
 851         }
 852         buffer_info->dma = 0;
 853         buffer_info->skb = NULL;
 854         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 855 }
 856 /**
 857  * atl1c_clean_tx_ring - Free Tx-skb
 858  * @adapter: board private structure
 859  */
 860 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 861                                 enum atl1c_trans_queue type)
 862 {
 863         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 864         struct atl1c_buffer *buffer_info;
 865         struct pci_dev *pdev = adapter->pdev;
 866         u16 index, ring_count;
 867
 868         ring_count = tpd_ring->count;
 869         for (index = 0; index < ring_count; index++) {
 870                 buffer_info = &tpd_ring->buffer_info[index];
 871                 atl1c_clean_buffer(pdev, buffer_info, 0);
 872         }
 873
 874         /* Zero out Tx-buffers */
 875         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 876                 ring_count);
 877         atomic_set(&tpd_ring->next_to_clean, 0);
 878         tpd_ring->next_to_use = 0;
 879 }
 880
 881 /**
 882  * atl1c_clean_rx_ring - Free rx-reservation skbs
 883  * @adapter: board private structure
 884  */
 885 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 886 {
 887         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 888         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 889         struct atl1c_buffer *buffer_info;
 890         struct pci_dev *pdev = adapter->pdev;
 891         int j;
 892
 893         for (j = 0; j < rfd_ring->count; j++) {
 894                 buffer_info = &rfd_ring->buffer_info[j];
 895                 atl1c_clean_buffer(pdev, buffer_info, 0);
 896         }
 897         /* zero out the descriptor ring */
 898         memset(rfd_ring->desc, 0, rfd_ring->size);
 899         rfd_ring->next_to_clean = 0;
 900         rfd_ring->next_to_use = 0;
 901         rrd_ring->next_to_use = 0;
 902         rrd_ring->next_to_clean = 0;
 903 }
 904
 905 /*
 906  * Read / Write Ptr Initialize:
 907  */
 908 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 909 {
 910         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 911         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 912         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 913         struct atl1c_buffer *buffer_info;
 914         int i, j;
 915
 916         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 917                 tpd_ring[i].next_to_use = 0;
 918                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 919                 buffer_info = tpd_ring[i].buffer_info;
 920                 for (j = 0; j < tpd_ring->count; j++)
 921                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 922                                         ATL1C_BUFFER_FREE);
 923         }
 924         rfd_ring->next_to_use = 0;
 925         rfd_ring->next_to_clean = 0;
 926         rrd_ring->next_to_use = 0;
 927         rrd_ring->next_to_clean = 0;
 928         for (j = 0; j < rfd_ring->count; j++) {
 929                 buffer_info = &rfd_ring->buffer_info[j];
 930                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 931         }
 932 }
 933
 934 /**
 935  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 936  * @adapter: board private structure
 937  *
 938  * Free all transmit software resources
 939  */
 940 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 941 {
 942         struct pci_dev *pdev = adapter->pdev;
 943
 944         pci_free_consistent(pdev, adapter->ring_header.size,
 945                                         adapter->ring_header.desc,
 946                                         adapter->ring_header.dma);
 947         adapter->ring_header.desc = NULL;
 948
 949         /* Note: just free tdp_ring.buffer_info,
 950         *  it contain rfd_ring.buffer_info, do not double free */
 951         if (adapter->tpd_ring[0].buffer_info) {
 952                 kfree(adapter->tpd_ring[0].buffer_info);
 953                 adapter->tpd_ring[0].buffer_info = NULL;
 954         }
 955 }
 956
 957 /**
 958  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 959  * @adapter: board private structure
 960  *
 961  * Return 0 on success, negative on failure
 962  */
 963 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 964 {
 965         struct pci_dev *pdev = adapter->pdev;
 966         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 967         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 968         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 969         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 970         int size;
 971         int i;
 972         int count = 0;
 973         int rx_desc_count = 0;
 974         u32 offset = 0;
 975
 976         rrd_ring->count = rfd_ring->count;
 977         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 978                 tpd_ring[i].count = tpd_ring[0].count;
 979
 980         /* 2 tpd queue, one high priority queue,
 981          * another normal priority queue */
 982         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 983                 rfd_ring->count);
 984         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 985         if (unlikely(!tpd_ring->buffer_info))
 986                 goto err_nomem;
 987
 988         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 989                 tpd_ring[i].buffer_info =
 990                         (tpd_ring->buffer_info + count);
 991                 count += tpd_ring[i].count;
 992         }
 993
 994         rfd_ring->buffer_info =
 995                 (tpd_ring->buffer_info + count);
 996         count += rfd_ring->count;
 997         rx_desc_count += rfd_ring->count;
 998
 999         /*
1000          * real ring DMA buffer
1001          * each ring/block may need up to 8 bytes for alignment, hence the
1002          * additional bytes tacked onto the end.
1003          */
1004         ring_header->size = size =
1005                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1006                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1007                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1008                 8 * 4;
1009
1010         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1011                                 &ring_header->dma);
1012         if (unlikely(!ring_header->desc)) {
1013                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1014                 goto err_nomem;
1015         }
1016         memset(ring_header->desc, 0, ring_header->size);
1017         /* init TPD ring */
1018
1019         tpd_ring[0].dma = roundup(ring_header->dma, 8);
1020         offset = tpd_ring[0].dma - ring_header->dma;
1021         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1022                 tpd_ring[i].dma = ring_header->dma + offset;
1023                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1024                 tpd_ring[i].size =
1025                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1026                 offset += roundup(tpd_ring[i].size, 8);
1027         }
1028         /* init RFD ring */
1029         rfd_ring->dma = ring_header->dma + offset;
1030         rfd_ring->desc = (u8 *) ring_header->desc + offset;
1031         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1032         offset += roundup(rfd_ring->size, 8);
1033
1034         /* init RRD ring */
1035         rrd_ring->dma = ring_header->dma + offset;
1036         rrd_ring->desc = (u8 *) ring_header->desc + offset;
1037         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1038                 rrd_ring->count;
1039         offset += roundup(rrd_ring->size, 8);
1040
1041         return 0;
1042
1043 err_nomem:
1044         kfree(tpd_ring->buffer_info);
1045         return -ENOMEM;
1046 }
1047
1048 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1049 {
1050         struct atl1c_hw *hw = &adapter->hw;
1051         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1052         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1053         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1054                                 adapter->tpd_ring;
1055
1056         /* TPD */
1057         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1058                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1059                                 AT_DMA_HI_ADDR_MASK) >> 32));
1060         /* just enable normal priority TX queue */
1061         AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1062                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1063                                 AT_DMA_LO_ADDR_MASK));
1064         AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1065                         (u32)(tpd_ring[atl1c_trans_high].dma &
1066                                 AT_DMA_LO_ADDR_MASK));
1067         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1068                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1069
1070
1071         /* RFD */
1072         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1073                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1074         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1075                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1076
1077         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1078                         rfd_ring->count & RFD_RING_SIZE_MASK);
1079         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1080                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1081
1082         /* RRD */
1083         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1084                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1085         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1086                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1087
1088         if (hw->nic_type == athr_l2c_b) {
1089                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1090                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1091                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1092                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1093                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1094                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1095                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1096                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1097         }
1098         /* Load all of base address above */
1099         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1100 }
1101
1102 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1103 {
1104         struct atl1c_hw *hw = &adapter->hw;
1105         int max_pay_load;
1106         u16 tx_offload_thresh;
1107         u32 txq_ctrl_data;
1108
1109         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1110         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1111                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1112         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1113         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1114         /*
1115          * if BIOS had changed the dam-read-max-length to an invalid value,
1116          * restore it to default value
1117          */
1118         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1119                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1120                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1121         }
1122         txq_ctrl_data =
1123                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1124                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1125
1126         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1127 }
1128
1129 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1130 {
1131         struct atl1c_hw *hw = &adapter->hw;
1132         u32 rxq_ctrl_data;
1133
1134         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1135                         RXQ_RFD_BURST_NUM_SHIFT;
1136
1137         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1138                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1139
1140         /* aspm for gigabit */
1141         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1142                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1143                         ASPM_THRUPUT_LIMIT_100M);
1144
1145         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1146 }
1147
1148 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1149 {
1150         struct atl1c_hw *hw = &adapter->hw;
1151         u32 dma_ctrl_data;
1152
1153         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1154                 DMA_CTRL_RREQ_PRI_DATA |
1155                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1156                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1157                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1158
1159         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1160 }
1161
1162 /*
1163  * Stop the mac, transmit and receive units
1164  * hw - Struct containing variables accessed by shared code
1165  * return : 0  or  idle status (if error)
1166  */
1167 static int atl1c_stop_mac(struct atl1c_hw *hw)
1168 {
1169         u32 data;
1170
1171         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1172         data &= ~RXQ_CTRL_EN;
1173         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1174
1175         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1176         data &= ~TXQ_CTRL_EN;
1177         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1178
1179         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1180
1181         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1182         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1183         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1184
1185         return (int)atl1c_wait_until_idle(hw,
1186                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1187 }
1188
1189 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1190 {
1191         struct atl1c_hw *hw = &adapter->hw;
1192         u32 mac, txq, rxq;
1193
1194         hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1195         hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1196                 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1197
1198         AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1199         AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1200         AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1201
1202         txq |= TXQ_CTRL_EN;
1203         rxq |= RXQ_CTRL_EN;
1204         mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1205                MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1206                MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1207                MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1208                MAC_CTRL_HASH_ALG_CRC32;
1209         if (hw->mac_duplex)
1210                 mac |= MAC_CTRL_DUPLX;
1211         else
1212                 mac &= ~MAC_CTRL_DUPLX;
1213         mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1214         mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1215
1216         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1217         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1218         AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1219 }
1220
1221 /*
1222  * Reset the transmit and receive units; mask and clear all interrupts.
1223  * hw - Struct containing variables accessed by shared code
1224  * return : 0  or  idle status (if error)
1225  */
1226 static int atl1c_reset_mac(struct atl1c_hw *hw)
1227 {
1228         struct atl1c_adapter *adapter = hw->adapter;
1229         struct pci_dev *pdev = adapter->pdev;
1230         u32 ctrl_data = 0;
1231
1232         atl1c_stop_mac(hw);
1233         /*
1234          * Issue Soft Reset to the MAC.  This will reset the chip's
1235          * transmit, receive, DMA.  It will not effect
1236          * the current PCI configuration.  The global reset bit is self-
1237          * clearing, and should clear within a microsecond.
1238          */
1239         AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1240         ctrl_data |= MASTER_CTRL_OOB_DIS;
1241         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1242
1243         AT_WRITE_FLUSH(hw);
1244         msleep(10);
1245         /* Wait at least 10ms for All module to be Idle */
1246
1247         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1248                 dev_err(&pdev->dev,
1249                         "MAC state machine can't be idle since"
1250                         " disabled for 10ms second\n");
1251                 return -1;
1252         }
1253         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1254
1255         /* driver control speed/duplex */
1256         AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1257         AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1258
1259         /* clk switch setting */
1260         AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1261         switch (hw->nic_type) {
1262         case athr_l2c_b:
1263                 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1264                                 SERDES_MAC_CLK_SLOWDOWN);
1265                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1266                 break;
1267         case athr_l2c_b2:
1268         case athr_l1d_2:
1269                 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1270                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1271                 break;
1272         default:
1273                 break;
1274         }
1275
1276         return 0;
1277 }
1278
1279 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1280 {
1281         u16 ctrl_flags = hw->ctrl_flags;
1282
1283         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1284         atl1c_set_aspm(hw, SPEED_0);
1285         hw->ctrl_flags = ctrl_flags;
1286 }
1287
1288 /*
1289  * Set ASPM state.
1290  * Enable/disable L0s/L1 depend on link state.
1291  */
1292 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1293 {
1294         u32 pm_ctrl_data;
1295         u32 link_l1_timer;
1296
1297         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1298         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1299                           PM_CTRL_ASPM_L0S_EN |
1300                           PM_CTRL_MAC_ASPM_CHK);
1301         /* L1 timer */
1302         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1303                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1304                 link_l1_timer =
1305                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1306                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1307                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1308                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1309         } else {
1310                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1311                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1312                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1313                         link_l1_timer = 1;
1314                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1315                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1316         }
1317
1318         /* L0S/L1 enable */
1319         if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1320                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1321         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1322                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1323
1324         /* l2cb & l1d & l2cb2 & l1d2 */
1325         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1326             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1327                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1328                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1329                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1330                                 PM_CTRL_SERDES_PD_EX_L1 |
1331                                 PM_CTRL_CLK_SWH_L1;
1332                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1333                                   PM_CTRL_SERDES_PLL_L1_EN |
1334                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1335                                   PM_CTRL_SA_DLY_EN |
1336                                   PM_CTRL_HOTRST);
1337                 /* disable l0s if link down or l2cb */
1338                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1339                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1340         } else { /* l1c */
1341                 pm_ctrl_data =
1342                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1343                 if (link_speed != SPEED_0) {
1344                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1345                                         PM_CTRL_SERDES_PLL_L1_EN |
1346                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1347                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1348                                           PM_CTRL_CLK_SWH_L1 |
1349                                           PM_CTRL_ASPM_L0S_EN |
1350                                           PM_CTRL_ASPM_L1_EN);
1351                 } else { /* link down */
1352                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1353                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1354                                           PM_CTRL_SERDES_PLL_L1_EN |
1355                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1356                                           PM_CTRL_ASPM_L0S_EN);
1357                 }
1358         }
1359         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1360
1361         return;
1362 }
1363
1364 /**
1365  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1366  * @adapter: board private structure
1367  *
1368  * Configure the Tx /Rx unit of the MAC after a reset.
1369  */
1370 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1371 {
1372         struct atl1c_hw *hw = &adapter->hw;
1373         u32 master_ctrl_data = 0;
1374         u32 intr_modrt_data;
1375         u32 data;
1376
1377         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1378         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1379                               MASTER_CTRL_RX_ITIMER_EN |
1380                               MASTER_CTRL_INT_RDCLR);
1381         /* clear interrupt status */
1382         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1383         /*  Clear any WOL status */
1384         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1385         /* set Interrupt Clear Timer
1386          * HW will enable self to assert interrupt event to system after
1387          * waiting x-time for software to notify it accept interrupt.
1388          */
1389
1390         data = CLK_GATING_EN_ALL;
1391         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1392                 if (hw->nic_type == athr_l2c_b)
1393                         data &= ~CLK_GATING_RXMAC_EN;
1394         } else
1395                 data = 0;
1396         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1397
1398         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1399                 hw->ict & INT_RETRIG_TIMER_MASK);
1400
1401         atl1c_configure_des_ring(adapter);
1402
1403         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1404                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1405                                         IRQ_MODRT_TX_TIMER_SHIFT;
1406                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1407                                         IRQ_MODRT_RX_TIMER_SHIFT;
1408                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1409                 master_ctrl_data |=
1410                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1411         }
1412
1413         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1414                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1415
1416         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1417         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1418
1419         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1420                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1421
1422         /* set MTU */
1423         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1424                         VLAN_HLEN + ETH_FCS_LEN);
1425
1426         atl1c_configure_tx(adapter);
1427         atl1c_configure_rx(adapter);
1428         atl1c_configure_dma(adapter);
1429
1430         return 0;
1431 }
1432
1433 static int atl1c_configure(struct atl1c_adapter *adapter)
1434 {
1435         struct net_device *netdev = adapter->netdev;
1436         int num;
1437
1438         atl1c_init_ring_ptrs(adapter);
1439         atl1c_set_multi(netdev);
1440         atl1c_restore_vlan(adapter);
1441
1442         num = atl1c_alloc_rx_buffer(adapter);
1443         if (unlikely(num == 0))
1444                 return -ENOMEM;
1445
1446         if (atl1c_configure_mac(adapter))
1447                 return -EIO;
1448
1449         return 0;
1450 }
1451
1452 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1453 {
1454         u16 hw_reg_addr = 0;
1455         unsigned long *stats_item = NULL;
1456         u32 data;
1457
1458         /* update rx status */
1459         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1460         stats_item  = &adapter->hw_stats.rx_ok;
1461         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1462                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1463                 *stats_item += data;
1464                 stats_item++;
1465                 hw_reg_addr += 4;
1466         }
1467 /* update tx status */
1468         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1469         stats_item  = &adapter->hw_stats.tx_ok;
1470         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1471                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1472                 *stats_item += data;
1473                 stats_item++;
1474                 hw_reg_addr += 4;
1475         }
1476 }
1477
1478 /**
1479  * atl1c_get_stats - Get System Network Statistics
1480  * @netdev: network interface device structure
1481  *
1482  * Returns the address of the device statistics structure.
1483  * The statistics are actually updated from the timer callback.
1484  */
1485 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1486 {
1487         struct atl1c_adapter *adapter = netdev_priv(netdev);
1488         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1489         struct net_device_stats *net_stats = &netdev->stats;
1490
1491         atl1c_update_hw_stats(adapter);
1492         net_stats->rx_packets = hw_stats->rx_ok;
1493         net_stats->tx_packets = hw_stats->tx_ok;
1494         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1495         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1496         net_stats->multicast  = hw_stats->rx_mcast;
1497         net_stats->collisions = hw_stats->tx_1_col +
1498                                 hw_stats->tx_2_col * 2 +
1499                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1500         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1501                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1502                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1503         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1504         net_stats->rx_length_errors = hw_stats->rx_len_err;
1505         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1506         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1507         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1508
1509         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1510
1511         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1512                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1513         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1514         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1515         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1516
1517         return net_stats;
1518 }
1519
1520 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1521 {
1522         u16 phy_data;
1523
1524         spin_lock(&adapter->mdio_lock);
1525         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1526         spin_unlock(&adapter->mdio_lock);
1527 }
1528
1529 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1530                                 enum atl1c_trans_queue type)
1531 {
1532         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1533         struct atl1c_buffer *buffer_info;
1534         struct pci_dev *pdev = adapter->pdev;
1535         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1536         u16 hw_next_to_clean;
1537         u16 reg;
1538
1539         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1540
1541         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1542
1543         while (next_to_clean != hw_next_to_clean) {
1544                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1545                 atl1c_clean_buffer(pdev, buffer_info, 1);
1546                 if (++next_to_clean == tpd_ring->count)
1547                         next_to_clean = 0;
1548                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1549         }
1550
1551         if (netif_queue_stopped(adapter->netdev) &&
1552                         netif_carrier_ok(adapter->netdev)) {
1553                 netif_wake_queue(adapter->netdev);
1554         }
1555
1556         return true;
1557 }
1558
1559 /**
1560  * atl1c_intr - Interrupt Handler
1561  * @irq: interrupt number
1562  * @data: pointer to a network interface device structure
1563  */
1564 static irqreturn_t atl1c_intr(int irq, void *data)
1565 {
1566         struct net_device *netdev  = data;
1567         struct atl1c_adapter *adapter = netdev_priv(netdev);
1568         struct pci_dev *pdev = adapter->pdev;
1569         struct atl1c_hw *hw = &adapter->hw;
1570         int max_ints = AT_MAX_INT_WORK;
1571         int handled = IRQ_NONE;
1572         u32 status;
1573         u32 reg_data;
1574
1575         do {
1576                 AT_READ_REG(hw, REG_ISR, &reg_data);
1577                 status = reg_data & hw->intr_mask;
1578
1579                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1580                         if (max_ints != AT_MAX_INT_WORK)
1581                                 handled = IRQ_HANDLED;
1582                         break;
1583                 }
1584                 /* link event */
1585                 if (status & ISR_GPHY)
1586                         atl1c_clear_phy_int(adapter);
1587                 /* Ack ISR */
1588                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1589                 if (status & ISR_RX_PKT) {
1590                         if (likely(napi_schedule_prep(&adapter->napi))) {
1591                                 hw->intr_mask &= ~ISR_RX_PKT;
1592                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1593                                 __napi_schedule(&adapter->napi);
1594                         }
1595                 }
1596                 if (status & ISR_TX_PKT)
1597                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1598
1599                 handled = IRQ_HANDLED;
1600                 /* check if PCIE PHY Link down */
1601                 if (status & ISR_ERROR) {
1602                         if (netif_msg_hw(adapter))
1603                                 dev_err(&pdev->dev,
1604                                         "atl1c hardware error (status = 0x%x)\n",
1605                                         status & ISR_ERROR);
1606                         /* reset MAC */
1607                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1608                         schedule_work(&adapter->common_task);
1609                         return IRQ_HANDLED;
1610                 }
1611
1612                 if (status & ISR_OVER)
1613                         if (netif_msg_intr(adapter))
1614                                 dev_warn(&pdev->dev,
1615                                         "TX/RX overflow (status = 0x%x)\n",
1616                                         status & ISR_OVER);
1617
1618                 /* link event */
1619                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1620                         netdev->stats.tx_carrier_errors++;
1621                         atl1c_link_chg_event(adapter);
1622                         break;
1623                 }
1624
1625         } while (--max_ints > 0);
1626         /* re-enable Interrupt*/
1627         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1628         return handled;
1629 }
1630
1631 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1632                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1633 {
1634         /*
1635          * The pid field in RRS in not correct sometimes, so we
1636          * cannot figure out if the packet is fragmented or not,
1637          * so we tell the KERNEL CHECKSUM_NONE
1638          */
1639         skb_checksum_none_assert(skb);
1640 }
1641
1642 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1643 {
1644         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1645         struct pci_dev *pdev = adapter->pdev;
1646         struct atl1c_buffer *buffer_info, *next_info;
1647         struct sk_buff *skb;
1648         void *vir_addr = NULL;
1649         u16 num_alloc = 0;
1650         u16 rfd_next_to_use, next_next;
1651         struct atl1c_rx_free_desc *rfd_desc;
1652         dma_addr_t mapping;
1653
1654         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1655         if (++next_next == rfd_ring->count)
1656                 next_next = 0;
1657         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1658         next_info = &rfd_ring->buffer_info[next_next];
1659
1660         while (next_info->flags & ATL1C_BUFFER_FREE) {
1661                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1662
1663                 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len);
1664                 if (unlikely(!skb)) {
1665                         if (netif_msg_rx_err(adapter))
1666                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1667                         break;
1668                 }
1669
1670                 /*
1671                  * Make buffer alignment 2 beyond a 16 byte boundary
1672                  * this will result in a 16 byte aligned IP header after
1673                  * the 14 byte MAC header is removed
1674                  */
1675                 vir_addr = skb->data;
1676                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1677                 buffer_info->skb = skb;
1678                 buffer_info->length = adapter->rx_buffer_len;
1679                 mapping = pci_map_single(pdev, vir_addr,
1680                                                 buffer_info->length,
1681                                                 PCI_DMA_FROMDEVICE);
1682                 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1683                         dev_kfree_skb(skb);
1684                         buffer_info->skb = NULL;
1685                         buffer_info->length = 0;
1686                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1687                         netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1688                         break;
1689                 }
1690                 buffer_info->dma = mapping;
1691                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1692                         ATL1C_PCIMAP_FROMDEVICE);
1693                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1694                 rfd_next_to_use = next_next;
1695                 if (++next_next == rfd_ring->count)
1696                         next_next = 0;
1697                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1698                 next_info = &rfd_ring->buffer_info[next_next];
1699                 num_alloc++;
1700         }
1701
1702         if (num_alloc) {
1703                 /* TODO: update mailbox here */
1704                 wmb();
1705                 rfd_ring->next_to_use = rfd_next_to_use;
1706                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1707                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1708         }
1709
1710         return num_alloc;
1711 }
1712
1713 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1714                         struct  atl1c_recv_ret_status *rrs, u16 num)
1715 {
1716         u16 i;
1717         /* the relationship between rrd and rfd is one map one */
1718         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1719                                         rrd_ring->next_to_clean)) {
1720                 rrs->word3 &= ~RRS_RXD_UPDATED;
1721                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1722                         rrd_ring->next_to_clean = 0;
1723         }
1724 }
1725
1726 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1727         struct atl1c_recv_ret_status *rrs, u16 num)
1728 {
1729         u16 i;
1730         u16 rfd_index;
1731         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1732
1733         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1734                         RRS_RX_RFD_INDEX_MASK;
1735         for (i = 0; i < num; i++) {
1736                 buffer_info[rfd_index].skb = NULL;
1737                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1738                                         ATL1C_BUFFER_FREE);
1739                 if (++rfd_index == rfd_ring->count)
1740                         rfd_index = 0;
1741         }
1742         rfd_ring->next_to_clean = rfd_index;
1743 }
1744
1745 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1746                    int *work_done, int work_to_do)
1747 {
1748         u16 rfd_num, rfd_index;
1749         u16 count = 0;
1750         u16 length;
1751         struct pci_dev *pdev = adapter->pdev;
1752         struct net_device *netdev  = adapter->netdev;
1753         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1754         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1755         struct sk_buff *skb;
1756         struct atl1c_recv_ret_status *rrs;
1757         struct atl1c_buffer *buffer_info;
1758
1759         while (1) {
1760                 if (*work_done >= work_to_do)
1761                         break;
1762                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1763                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1764                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1765                                 RRS_RX_RFD_CNT_MASK;
1766                         if (unlikely(rfd_num != 1))
1767                                 /* TODO support mul rfd*/
1768                                 if (netif_msg_rx_err(adapter))
1769                                         dev_warn(&pdev->dev,
1770                                                 "Multi rfd not support yet!\n");
1771                         goto rrs_checked;
1772                 } else {
1773                         break;
1774                 }
1775 rrs_checked:
1776                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1777                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1778                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1779                                 if (netif_msg_rx_err(adapter))
1780                                         dev_warn(&pdev->dev,
1781                                                 "wrong packet! rrs word3 is %x\n",
1782                                                 rrs->word3);
1783                         continue;
1784                 }
1785
1786                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1787                                 RRS_PKT_SIZE_MASK);
1788                 /* Good Receive */
1789                 if (likely(rfd_num == 1)) {
1790                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1791                                         RRS_RX_RFD_INDEX_MASK;
1792                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1793                         pci_unmap_single(pdev, buffer_info->dma,
1794                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1795                         skb = buffer_info->skb;
1796                 } else {
1797                         /* TODO */
1798                         if (netif_msg_rx_err(adapter))
1799                                 dev_warn(&pdev->dev,
1800                                         "Multi rfd not support yet!\n");
1801                         break;
1802                 }
1803                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1804                 skb_put(skb, length - ETH_FCS_LEN);
1805                 skb->protocol = eth_type_trans(skb, netdev);
1806                 atl1c_rx_checksum(adapter, skb, rrs);
1807                 if (rrs->word3 & RRS_VLAN_INS) {
1808                         u16 vlan;
1809
1810                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1811                         vlan = le16_to_cpu(vlan);
1812                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1813                 }
1814                 netif_receive_skb(skb);
1815
1816                 (*work_done)++;
1817                 count++;
1818         }
1819         if (count)
1820                 atl1c_alloc_rx_buffer(adapter);
1821 }
1822
1823 /**
1824  * atl1c_clean - NAPI Rx polling callback
1825  */
1826 static int atl1c_clean(struct napi_struct *napi, int budget)
1827 {
1828         struct atl1c_adapter *adapter =
1829                         container_of(napi, struct atl1c_adapter, napi);
1830         int work_done = 0;
1831
1832         /* Keep link state information with original netdev */
1833         if (!netif_carrier_ok(adapter->netdev))
1834                 goto quit_polling;
1835         /* just enable one RXQ */
1836         atl1c_clean_rx_irq(adapter, &work_done, budget);
1837
1838         if (work_done < budget) {
1839 quit_polling:
1840                 napi_complete(napi);
1841                 adapter->hw.intr_mask |= ISR_RX_PKT;
1842                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1843         }
1844         return work_done;
1845 }
1846
1847 #ifdef CONFIG_NET_POLL_CONTROLLER
1848
1849 /*
1850  * Polling 'interrupt' - used by things like netconsole to send skbs
1851  * without having to re-enable interrupts. It's not called while
1852  * the interrupt routine is executing.
1853  */
1854 static void atl1c_netpoll(struct net_device *netdev)
1855 {
1856         struct atl1c_adapter *adapter = netdev_priv(netdev);
1857
1858         disable_irq(adapter->pdev->irq);
1859         atl1c_intr(adapter->pdev->irq, netdev);
1860         enable_irq(adapter->pdev->irq);
1861 }
1862 #endif
1863
1864 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1865 {
1866         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1867         u16 next_to_use = 0;
1868         u16 next_to_clean = 0;
1869
1870         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1871         next_to_use   = tpd_ring->next_to_use;
1872
1873         return (u16)(next_to_clean > next_to_use) ?
1874                 (next_to_clean - next_to_use - 1) :
1875                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1876 }
1877
1878 /*
1879  * get next usable tpd
1880  * Note: should call atl1c_tdp_avail to make sure
1881  * there is enough tpd to use
1882  */
1883 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1884         enum atl1c_trans_queue type)
1885 {
1886         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1887         struct atl1c_tpd_desc *tpd_desc;
1888         u16 next_to_use = 0;
1889
1890         next_to_use = tpd_ring->next_to_use;
1891         if (++tpd_ring->next_to_use == tpd_ring->count)
1892                 tpd_ring->next_to_use = 0;
1893         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1894         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1895         return  tpd_desc;
1896 }
1897
1898 static struct atl1c_buffer *
1899 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1900 {
1901         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1902
1903         return &tpd_ring->buffer_info[tpd -
1904                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1905 }
1906
1907 /* Calculate the transmit packet descript needed*/
1908 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1909 {
1910         u16 tpd_req;
1911         u16 proto_hdr_len = 0;
1912
1913         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1914
1915         if (skb_is_gso(skb)) {
1916                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1917                 if (proto_hdr_len < skb_headlen(skb))
1918                         tpd_req++;
1919                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1920                         tpd_req++;
1921         }
1922         return tpd_req;
1923 }
1924
1925 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1926                           struct sk_buff *skb,
1927                           struct atl1c_tpd_desc **tpd,
1928                           enum atl1c_trans_queue type)
1929 {
1930         struct pci_dev *pdev = adapter->pdev;
1931         u8 hdr_len;
1932         u32 real_len;
1933         unsigned short offload_type;
1934         int err;
1935
1936         if (skb_is_gso(skb)) {
1937                 if (skb_header_cloned(skb)) {
1938                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1939                         if (unlikely(err))
1940                                 return -1;
1941                 }
1942                 offload_type = skb_shinfo(skb)->gso_type;
1943
1944                 if (offload_type & SKB_GSO_TCPV4) {
1945                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1946                                         + ntohs(ip_hdr(skb)->tot_len));
1947
1948                         if (real_len < skb->len)
1949                                 pskb_trim(skb, real_len);
1950
1951                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1952                         if (unlikely(skb->len == hdr_len)) {
1953                                 /* only xsum need */
1954                                 if (netif_msg_tx_queued(adapter))
1955                                         dev_warn(&pdev->dev,
1956                                                 "IPV4 tso with zero data??\n");
1957                                 goto check_sum;
1958                         } else {
1959                                 ip_hdr(skb)->check = 0;
1960                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1961                                                         ip_hdr(skb)->saddr,
1962                                                         ip_hdr(skb)->daddr,
1963                                                         0, IPPROTO_TCP, 0);
1964                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1965                         }
1966                 }
1967
1968                 if (offload_type & SKB_GSO_TCPV6) {
1969                         struct atl1c_tpd_ext_desc *etpd =
1970                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1971
1972                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1973                         *tpd = atl1c_get_tpd(adapter, type);
1974                         ipv6_hdr(skb)->payload_len = 0;
1975                         /* check payload == 0 byte ? */
1976                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1977                         if (unlikely(skb->len == hdr_len)) {
1978                                 /* only xsum need */
1979                                 if (netif_msg_tx_queued(adapter))
1980                                         dev_warn(&pdev->dev,
1981                                                 "IPV6 tso with zero data??\n");
1982                                 goto check_sum;
1983                         } else
1984                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1985                                                 &ipv6_hdr(skb)->saddr,
1986                                                 &ipv6_hdr(skb)->daddr,
1987                                                 0, IPPROTO_TCP, 0);
1988                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1989                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1990                         etpd->pkt_len = cpu_to_le32(skb->len);
1991                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1992                 }
1993
1994                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1995                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1996                                 TPD_TCPHDR_OFFSET_SHIFT;
1997                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1998                                 TPD_MSS_SHIFT;
1999                 return 0;
2000         }
2001
2002 check_sum:
2003         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2004                 u8 css, cso;
2005                 cso = skb_checksum_start_offset(skb);
2006
2007                 if (unlikely(cso & 0x1)) {
2008                         if (netif_msg_tx_err(adapter))
2009                                 dev_err(&adapter->pdev->dev,
2010                                         "payload offset should not an event number\n");
2011                         return -1;
2012                 } else {
2013                         css = cso + skb->csum_offset;
2014
2015                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2016                                         TPD_PLOADOFFSET_SHIFT;
2017                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2018                                         TPD_CCSUM_OFFSET_SHIFT;
2019                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2020                 }
2021         }
2022         return 0;
2023 }
2024
2025 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2026                               struct atl1c_tpd_desc *first_tpd,
2027                               enum atl1c_trans_queue type)
2028 {
2029         struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2030         struct atl1c_buffer *buffer_info;
2031         struct atl1c_tpd_desc *tpd;
2032         u16 first_index, index;
2033
2034         first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2035         index = first_index;
2036         while (index != tpd_ring->next_to_use) {
2037                 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2038                 buffer_info = &tpd_ring->buffer_info[index];
2039                 atl1c_clean_buffer(adpt->pdev, buffer_info, 0);
2040                 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2041                 if (++index == tpd_ring->count)
2042                         index = 0;
2043         }
2044         tpd_ring->next_to_use = first_index;
2045 }
2046
2047 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2048                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2049                         enum atl1c_trans_queue type)
2050 {
2051         struct atl1c_tpd_desc *use_tpd = NULL;
2052         struct atl1c_buffer *buffer_info = NULL;
2053         u16 buf_len = skb_headlen(skb);
2054         u16 map_len = 0;
2055         u16 mapped_len = 0;
2056         u16 hdr_len = 0;
2057         u16 nr_frags;
2058         u16 f;
2059         int tso;
2060
2061         nr_frags = skb_shinfo(skb)->nr_frags;
2062         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2063         if (tso) {
2064                 /* TSO */
2065                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2066                 use_tpd = tpd;
2067
2068                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2069                 buffer_info->length = map_len;
2070                 buffer_info->dma = pci_map_single(adapter->pdev,
2071                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2072                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2073                                                    buffer_info->dma)))
2074                         goto err_dma;
2075                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2076                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2077                         ATL1C_PCIMAP_TODEVICE);
2078                 mapped_len += map_len;
2079                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2080                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2081         }
2082
2083         if (mapped_len < buf_len) {
2084                 /* mapped_len == 0, means we should use the first tpd,
2085                    which is given by caller  */
2086                 if (mapped_len == 0)
2087                         use_tpd = tpd;
2088                 else {
2089                         use_tpd = atl1c_get_tpd(adapter, type);
2090                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2091                 }
2092                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2093                 buffer_info->length = buf_len - mapped_len;
2094                 buffer_info->dma =
2095                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2096                                         buffer_info->length, PCI_DMA_TODEVICE);
2097                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2098                                                    buffer_info->dma)))
2099                         goto err_dma;
2100
2101                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2102                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2103                         ATL1C_PCIMAP_TODEVICE);
2104                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2105                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2106         }
2107
2108         for (f = 0; f < nr_frags; f++) {
2109                 struct skb_frag_struct *frag;
2110
2111                 frag = &skb_shinfo(skb)->frags[f];
2112
2113                 use_tpd = atl1c_get_tpd(adapter, type);
2114                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2115
2116                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2117                 buffer_info->length = skb_frag_size(frag);
2118                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2119                                                     frag, 0,
2120                                                     buffer_info->length,
2121                                                     DMA_TO_DEVICE);
2122                 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2123                         goto err_dma;
2124
2125                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2126                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2127                         ATL1C_PCIMAP_TODEVICE);
2128                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2129                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2130         }
2131
2132         /* The last tpd */
2133         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2134         /* The last buffer info contain the skb address,
2135            so it will be free after unmap */
2136         buffer_info->skb = skb;
2137
2138         return 0;
2139
2140 err_dma:
2141         buffer_info->dma = 0;
2142         buffer_info->length = 0;
2143         return -1;
2144 }
2145
2146 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2147                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2148 {
2149         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2150         u16 reg;
2151
2152         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2153         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2154 }
2155
2156 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2157                                           struct net_device *netdev)
2158 {
2159         struct atl1c_adapter *adapter = netdev_priv(netdev);
2160         unsigned long flags;
2161         u16 tpd_req = 1;
2162         struct atl1c_tpd_desc *tpd;
2163         enum atl1c_trans_queue type = atl1c_trans_normal;
2164
2165         if (test_bit(__AT_DOWN, &adapter->flags)) {
2166                 dev_kfree_skb_any(skb);
2167                 return NETDEV_TX_OK;
2168         }
2169
2170         tpd_req = atl1c_cal_tpd_req(skb);
2171         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2172                 if (netif_msg_pktdata(adapter))
2173                         dev_info(&adapter->pdev->dev, "tx locked\n");
2174                 return NETDEV_TX_LOCKED;
2175         }
2176
2177         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2178                 /* no enough descriptor, just stop queue */
2179                 netif_stop_queue(netdev);
2180                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2181                 return NETDEV_TX_BUSY;
2182         }
2183
2184         tpd = atl1c_get_tpd(adapter, type);
2185
2186         /* do TSO and check sum */
2187         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2188                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2189                 dev_kfree_skb_any(skb);
2190                 return NETDEV_TX_OK;
2191         }
2192
2193         if (unlikely(vlan_tx_tag_present(skb))) {
2194                 u16 vlan = vlan_tx_tag_get(skb);
2195                 __le16 tag;
2196
2197                 vlan = cpu_to_le16(vlan);
2198                 AT_VLAN_TO_TAG(vlan, tag);
2199                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2200                 tpd->vlan_tag = tag;
2201         }
2202
2203         if (skb_network_offset(skb) != ETH_HLEN)
2204                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2205
2206         if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2207                 netif_info(adapter, tx_done, adapter->netdev,
2208                            "tx-skb droppted due to dma error\n");
2209                 /* roll back tpd/buffer */
2210                 atl1c_tx_rollback(adapter, tpd, type);
2211                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2212                 dev_kfree_skb(skb);
2213         } else {
2214                 atl1c_tx_queue(adapter, skb, tpd, type);
2215                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2216         }
2217
2218         return NETDEV_TX_OK;
2219 }
2220
2221 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2222 {
2223         struct net_device *netdev = adapter->netdev;
2224
2225         free_irq(adapter->pdev->irq, netdev);
2226
2227         if (adapter->have_msi)
2228                 pci_disable_msi(adapter->pdev);
2229 }
2230
2231 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2232 {
2233         struct pci_dev    *pdev   = adapter->pdev;
2234         struct net_device *netdev = adapter->netdev;
2235         int flags = 0;
2236         int err = 0;
2237
2238         adapter->have_msi = true;
2239         err = pci_enable_msi(adapter->pdev);
2240         if (err) {
2241                 if (netif_msg_ifup(adapter))
2242                         dev_err(&pdev->dev,
2243                                 "Unable to allocate MSI interrupt Error: %d\n",
2244                                 err);
2245                 adapter->have_msi = false;
2246         }
2247
2248         if (!adapter->have_msi)
2249                 flags |= IRQF_SHARED;
2250         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2251                         netdev->name, netdev);
2252         if (err) {
2253                 if (netif_msg_ifup(adapter))
2254                         dev_err(&pdev->dev,
2255                                 "Unable to allocate interrupt Error: %d\n",
2256                                 err);
2257                 if (adapter->have_msi)
2258                         pci_disable_msi(adapter->pdev);
2259                 return err;
2260         }
2261         if (netif_msg_ifup(adapter))
2262                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2263         return err;
2264 }
2265
2266
2267 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2268 {
2269         /* release tx-pending skbs and reset tx/rx ring index */
2270         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2271         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2272         atl1c_clean_rx_ring(adapter);
2273 }
2274
2275 static int atl1c_up(struct atl1c_adapter *adapter)
2276 {
2277         struct net_device *netdev = adapter->netdev;
2278         int err;
2279
2280         netif_carrier_off(netdev);
2281
2282         err = atl1c_configure(adapter);
2283         if (unlikely(err))
2284                 goto err_up;
2285
2286         err = atl1c_request_irq(adapter);
2287         if (unlikely(err))
2288                 goto err_up;
2289
2290         atl1c_check_link_status(adapter);
2291         clear_bit(__AT_DOWN, &adapter->flags);
2292         napi_enable(&adapter->napi);
2293         atl1c_irq_enable(adapter);
2294         netif_start_queue(netdev);
2295         return err;
2296
2297 err_up:
2298         atl1c_clean_rx_ring(adapter);
2299         return err;
2300 }
2301
2302 static void atl1c_down(struct atl1c_adapter *adapter)
2303 {
2304         struct net_device *netdev = adapter->netdev;
2305
2306         atl1c_del_timer(adapter);
2307         adapter->work_event = 0; /* clear all event */
2308         /* signal that we're down so the interrupt handler does not
2309          * reschedule our watchdog timer */
2310         set_bit(__AT_DOWN, &adapter->flags);
2311         netif_carrier_off(netdev);
2312         napi_disable(&adapter->napi);
2313         atl1c_irq_disable(adapter);
2314         atl1c_free_irq(adapter);
2315         /* disable ASPM if device inactive */
2316         atl1c_disable_l0s_l1(&adapter->hw);
2317         /* reset MAC to disable all RX/TX */
2318         atl1c_reset_mac(&adapter->hw);
2319         msleep(1);
2320
2321         adapter->link_speed = SPEED_0;
2322         adapter->link_duplex = -1;
2323         atl1c_reset_dma_ring(adapter);
2324 }
2325
2326 /**
2327  * atl1c_open - Called when a network interface is made active
2328  * @netdev: network interface device structure
2329  *
2330  * Returns 0 on success, negative value on failure
2331  *
2332  * The open entry point is called when a network interface is made
2333  * active by the system (IFF_UP).  At this point all resources needed
2334  * for transmit and receive operations are allocated, the interrupt
2335  * handler is registered with the OS, the watchdog timer is started,
2336  * and the stack is notified that the interface is ready.
2337  */
2338 static int atl1c_open(struct net_device *netdev)
2339 {
2340         struct atl1c_adapter *adapter = netdev_priv(netdev);
2341         int err;
2342
2343         /* disallow open during test */
2344         if (test_bit(__AT_TESTING, &adapter->flags))
2345                 return -EBUSY;
2346
2347         /* allocate rx/tx dma buffer & descriptors */
2348         err = atl1c_setup_ring_resources(adapter);
2349         if (unlikely(err))
2350                 return err;
2351
2352         err = atl1c_up(adapter);
2353         if (unlikely(err))
2354                 goto err_up;
2355
2356         return 0;
2357
2358 err_up:
2359         atl1c_free_irq(adapter);
2360         atl1c_free_ring_resources(adapter);
2361         atl1c_reset_mac(&adapter->hw);
2362         return err;
2363 }
2364
2365 /**
2366  * atl1c_close - Disables a network interface
2367  * @netdev: network interface device structure
2368  *
2369  * Returns 0, this is not allowed to fail
2370  *
2371  * The close entry point is called when an interface is de-activated
2372  * by the OS.  The hardware is still under the drivers control, but
2373  * needs to be disabled.  A global MAC reset is issued to stop the
2374  * hardware, and all transmit and receive resources are freed.
2375  */
2376 static int atl1c_close(struct net_device *netdev)
2377 {
2378         struct atl1c_adapter *adapter = netdev_priv(netdev);
2379
2380         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2381         set_bit(__AT_DOWN, &adapter->flags);
2382         cancel_work_sync(&adapter->common_task);
2383         atl1c_down(adapter);
2384         atl1c_free_ring_resources(adapter);
2385         return 0;
2386 }
2387
2388 static int atl1c_suspend(struct device *dev)
2389 {
2390         struct pci_dev *pdev = to_pci_dev(dev);
2391         struct net_device *netdev = pci_get_drvdata(pdev);
2392         struct atl1c_adapter *adapter = netdev_priv(netdev);
2393         struct atl1c_hw *hw = &adapter->hw;
2394         u32 wufc = adapter->wol;
2395
2396         atl1c_disable_l0s_l1(hw);
2397         if (netif_running(netdev)) {
2398                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2399                 atl1c_down(adapter);
2400         }
2401         netif_device_detach(netdev);
2402
2403         if (wufc)
2404                 if (atl1c_phy_to_ps_link(hw) != 0)
2405                         dev_dbg(&pdev->dev, "phy power saving failed");
2406
2407         atl1c_power_saving(hw, wufc);
2408
2409         return 0;
2410 }
2411
2412 #ifdef CONFIG_PM_SLEEP
2413 static int atl1c_resume(struct device *dev)
2414 {
2415         struct pci_dev *pdev = to_pci_dev(dev);
2416         struct net_device *netdev = pci_get_drvdata(pdev);
2417         struct atl1c_adapter *adapter = netdev_priv(netdev);
2418
2419         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2420         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2421
2422         atl1c_phy_reset(&adapter->hw);
2423         atl1c_reset_mac(&adapter->hw);
2424         atl1c_phy_init(&adapter->hw);
2425
2426 #if 0
2427         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2428         pm_data &= ~PM_CTRLSTAT_PME_EN;
2429         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2430 #endif
2431
2432         netif_device_attach(netdev);
2433         if (netif_running(netdev))
2434                 atl1c_up(adapter);
2435
2436         return 0;
2437 }
2438 #endif
2439
2440 static void atl1c_shutdown(struct pci_dev *pdev)
2441 {
2442         struct net_device *netdev = pci_get_drvdata(pdev);
2443         struct atl1c_adapter *adapter = netdev_priv(netdev);
2444
2445         atl1c_suspend(&pdev->dev);
2446         pci_wake_from_d3(pdev, adapter->wol);
2447         pci_set_power_state(pdev, PCI_D3hot);
2448 }
2449
2450 static const struct net_device_ops atl1c_netdev_ops = {
2451         .ndo_open               = atl1c_open,
2452         .ndo_stop               = atl1c_close,
2453         .ndo_validate_addr      = eth_validate_addr,
2454         .ndo_start_xmit         = atl1c_xmit_frame,
2455         .ndo_set_mac_address    = atl1c_set_mac_addr,
2456         .ndo_set_rx_mode        = atl1c_set_multi,
2457         .ndo_change_mtu         = atl1c_change_mtu,
2458         .ndo_fix_features       = atl1c_fix_features,
2459         .ndo_set_features       = atl1c_set_features,
2460         .ndo_do_ioctl           = atl1c_ioctl,
2461         .ndo_tx_timeout         = atl1c_tx_timeout,
2462         .ndo_get_stats          = atl1c_get_stats,
2463 #ifdef CONFIG_NET_POLL_CONTROLLER
2464         .ndo_poll_controller    = atl1c_netpoll,
2465 #endif
2466 };
2467
2468 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2469 {
2470         SET_NETDEV_DEV(netdev, &pdev->dev);
2471         pci_set_drvdata(pdev, netdev);
2472
2473         netdev->netdev_ops = &atl1c_netdev_ops;
2474         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2475         atl1c_set_ethtool_ops(netdev);
2476
2477         /* TODO: add when ready */
2478         netdev->hw_features =   NETIF_F_SG              |
2479                                 NETIF_F_HW_CSUM         |
2480                                 NETIF_F_HW_VLAN_CTAG_RX |
2481                                 NETIF_F_TSO             |
2482                                 NETIF_F_TSO6;
2483         netdev->features =      netdev->hw_features     |
2484                                 NETIF_F_HW_VLAN_CTAG_TX;
2485         return 0;
2486 }
2487
2488 /**
2489  * atl1c_probe - Device Initialization Routine
2490  * @pdev: PCI device information struct
2491  * @ent: entry in atl1c_pci_tbl
2492  *
2493  * Returns 0 on success, negative on failure
2494  *
2495  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2496  * The OS initialization, configuring of the adapter private structure,
2497  * and a hardware reset occur.
2498  */
2499 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2500 {
2501         struct net_device *netdev;
2502         struct atl1c_adapter *adapter;
2503         static int cards_found;
2504
2505         int err = 0;
2506
2507         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2508         err = pci_enable_device_mem(pdev);
2509         if (err) {
2510                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2511                 return err;
2512         }
2513
2514         /*
2515          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2516          * shared register for the high 32 bits, so only a single, aligned,
2517          * 4 GB physical address range can be used at a time.
2518          *
2519          * Supporting 64-bit DMA on this hardware is more trouble than it's
2520          * worth.  It is far easier to limit to 32-bit DMA than update
2521          * various kernel subsystems to support the mechanics required by a
2522          * fixed-high-32-bit system.
2523          */
2524         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2525             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2526                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2527                 goto err_dma;
2528         }
2529
2530         err = pci_request_regions(pdev, atl1c_driver_name);
2531         if (err) {
2532                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2533                 goto err_pci_reg;
2534         }
2535
2536         pci_set_master(pdev);
2537
2538         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2539         if (netdev == NULL) {
2540                 err = -ENOMEM;
2541                 goto err_alloc_etherdev;
2542         }
2543
2544         err = atl1c_init_netdev(netdev, pdev);
2545         if (err) {
2546                 dev_err(&pdev->dev, "init netdevice failed\n");
2547                 goto err_init_netdev;
2548         }
2549         adapter = netdev_priv(netdev);
2550         adapter->bd_number = cards_found;
2551         adapter->netdev = netdev;
2552         adapter->pdev = pdev;
2553         adapter->hw.adapter = adapter;
2554         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2555         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2556         if (!adapter->hw.hw_addr) {
2557                 err = -EIO;
2558                 dev_err(&pdev->dev, "cannot map device registers\n");
2559                 goto err_ioremap;
2560         }
2561
2562         /* init mii data */
2563         adapter->mii.dev = netdev;
2564         adapter->mii.mdio_read  = atl1c_mdio_read;
2565         adapter->mii.mdio_write = atl1c_mdio_write;
2566         adapter->mii.phy_id_mask = 0x1f;
2567         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2568         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2569         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2570                         (unsigned long)adapter);
2571         /* setup the private structure */
2572         err = atl1c_sw_init(adapter);
2573         if (err) {
2574                 dev_err(&pdev->dev, "net device private data init failed\n");
2575                 goto err_sw_init;
2576         }
2577         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2578
2579         /* Init GPHY as early as possible due to power saving issue  */
2580         atl1c_phy_reset(&adapter->hw);
2581
2582         err = atl1c_reset_mac(&adapter->hw);
2583         if (err) {
2584                 err = -EIO;
2585                 goto err_reset;
2586         }
2587
2588         /* reset the controller to
2589          * put the device in a known good starting state */
2590         err = atl1c_phy_init(&adapter->hw);
2591         if (err) {
2592                 err = -EIO;
2593                 goto err_reset;
2594         }
2595         if (atl1c_read_mac_addr(&adapter->hw)) {
2596                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2597                 netdev->addr_assign_type = NET_ADDR_RANDOM;
2598         }
2599         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2600         if (netif_msg_probe(adapter))
2601                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2602                         adapter->hw.mac_addr);
2603
2604         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2605         INIT_WORK(&adapter->common_task, atl1c_common_task);
2606         adapter->work_event = 0;
2607         err = register_netdev(netdev);
2608         if (err) {
2609                 dev_err(&pdev->dev, "register netdevice failed\n");
2610                 goto err_register;
2611         }
2612
2613         if (netif_msg_probe(adapter))
2614                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2615         cards_found++;
2616         return 0;
2617
2618 err_reset:
2619 err_register:
2620 err_sw_init:
2621         iounmap(adapter->hw.hw_addr);
2622 err_init_netdev:
2623 err_ioremap:
2624         free_netdev(netdev);
2625 err_alloc_etherdev:
2626         pci_release_regions(pdev);
2627 err_pci_reg:
2628 err_dma:
2629         pci_disable_device(pdev);
2630         return err;
2631 }
2632
2633 /**
2634  * atl1c_remove - Device Removal Routine
2635  * @pdev: PCI device information struct
2636  *
2637  * atl1c_remove is called by the PCI subsystem to alert the driver
2638  * that it should release a PCI device.  The could be caused by a
2639  * Hot-Plug event, or because the driver is going to be removed from
2640  * memory.
2641  */
2642 static void atl1c_remove(struct pci_dev *pdev)
2643 {
2644         struct net_device *netdev = pci_get_drvdata(pdev);
2645         struct atl1c_adapter *adapter = netdev_priv(netdev);
2646
2647         unregister_netdev(netdev);
2648         /* restore permanent address */
2649         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2650         atl1c_phy_disable(&adapter->hw);
2651
2652         iounmap(adapter->hw.hw_addr);
2653
2654         pci_release_regions(pdev);
2655         pci_disable_device(pdev);
2656         free_netdev(netdev);
2657 }
2658
2659 /**
2660  * atl1c_io_error_detected - called when PCI error is detected
2661  * @pdev: Pointer to PCI device
2662  * @state: The current pci connection state
2663  *
2664  * This function is called after a PCI bus error affecting
2665  * this device has been detected.
2666  */
2667 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2668                                                 pci_channel_state_t state)
2669 {
2670         struct net_device *netdev = pci_get_drvdata(pdev);
2671         struct atl1c_adapter *adapter = netdev_priv(netdev);
2672
2673         netif_device_detach(netdev);
2674
2675         if (state == pci_channel_io_perm_failure)
2676                 return PCI_ERS_RESULT_DISCONNECT;
2677
2678         if (netif_running(netdev))
2679                 atl1c_down(adapter);
2680
2681         pci_disable_device(pdev);
2682
2683         /* Request a slot slot reset. */
2684         return PCI_ERS_RESULT_NEED_RESET;
2685 }
2686
2687 /**
2688  * atl1c_io_slot_reset - called after the pci bus has been reset.
2689  * @pdev: Pointer to PCI device
2690  *
2691  * Restart the card from scratch, as if from a cold-boot. Implementation
2692  * resembles the first-half of the e1000_resume routine.
2693  */
2694 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2695 {
2696         struct net_device *netdev = pci_get_drvdata(pdev);
2697         struct atl1c_adapter *adapter = netdev_priv(netdev);
2698
2699         if (pci_enable_device(pdev)) {
2700                 if (netif_msg_hw(adapter))
2701                         dev_err(&pdev->dev,
2702                                 "Cannot re-enable PCI device after reset\n");
2703                 return PCI_ERS_RESULT_DISCONNECT;
2704         }
2705         pci_set_master(pdev);
2706
2707         pci_enable_wake(pdev, PCI_D3hot, 0);
2708         pci_enable_wake(pdev, PCI_D3cold, 0);
2709
2710         atl1c_reset_mac(&adapter->hw);
2711
2712         return PCI_ERS_RESULT_RECOVERED;
2713 }
2714
2715 /**
2716  * atl1c_io_resume - called when traffic can start flowing again.
2717  * @pdev: Pointer to PCI device
2718  *
2719  * This callback is called when the error recovery driver tells us that
2720  * its OK to resume normal operation. Implementation resembles the
2721  * second-half of the atl1c_resume routine.
2722  */
2723 static void atl1c_io_resume(struct pci_dev *pdev)
2724 {
2725         struct net_device *netdev = pci_get_drvdata(pdev);
2726         struct atl1c_adapter *adapter = netdev_priv(netdev);
2727
2728         if (netif_running(netdev)) {
2729                 if (atl1c_up(adapter)) {
2730                         if (netif_msg_hw(adapter))
2731                                 dev_err(&pdev->dev,
2732                                         "Cannot bring device back up after reset\n");
2733                         return;
2734                 }
2735         }
2736
2737         netif_device_attach(netdev);
2738 }
2739
2740 static const struct pci_error_handlers atl1c_err_handler = {
2741         .error_detected = atl1c_io_error_detected,
2742         .slot_reset = atl1c_io_slot_reset,
2743         .resume = atl1c_io_resume,
2744 };
2745
2746 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2747
2748 static struct pci_driver atl1c_driver = {
2749         .name     = atl1c_driver_name,
2750         .id_table = atl1c_pci_tbl,
2751         .probe    = atl1c_probe,
2752         .remove   = atl1c_remove,
2753         .shutdown = atl1c_shutdown,
2754         .err_handler = &atl1c_err_handler,
2755         .driver.pm = &atl1c_pm_ops,
2756 };
2757
2758 /**
2759  * atl1c_init_module - Driver Registration Routine
2760  *
2761  * atl1c_init_module is the first routine called when the driver is
2762  * loaded. All it does is register with the PCI subsystem.
2763  */
2764 static int __init atl1c_init_module(void)
2765 {
2766         return pci_register_driver(&atl1c_driver);
2767 }
2768
2769 /**
2770  * atl1c_exit_module - Driver Exit Cleanup Routine
2771  *
2772  * atl1c_exit_module is called just before the driver is removed
2773  * from memory.
2774  */
2775 static void __exit atl1c_exit_module(void)
2776 {
2777         pci_unregister_driver(&atl1c_driver);
2778 }
2779
2780 module_init(atl1c_init_module);
2781 module_exit(atl1c_exit_module);