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         unsigned int head_size;
 485         int mtu = dev->mtu;
 486
 487         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 488                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 489
 490         head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) +
 491                     SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 492         adapter->rx_frag_size = roundup_pow_of_two(head_size);
 493 }
 494
 495 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 496         netdev_features_t features)
 497 {
 498         /*
 499          * Since there is no support for separate rx/tx vlan accel
 500          * enable/disable make sure tx flag is always in same state as rx.
 501          */
 502         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 503                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 504         else
 505                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 506
 507         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 508                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 509
 510         return features;
 511 }
 512
 513 static int atl1c_set_features(struct net_device *netdev,
 514         netdev_features_t features)
 515 {
 516         netdev_features_t changed = netdev->features ^ features;
 517
 518         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 519                 atl1c_vlan_mode(netdev, features);
 520
 521         return 0;
 522 }
 523
 524 /**
 525  * atl1c_change_mtu - Change the Maximum Transfer Unit
 526  * @netdev: network interface device structure
 527  * @new_mtu: new value for maximum frame size
 528  *
 529  * Returns 0 on success, negative on failure
 530  */
 531 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 532 {
 533         struct atl1c_adapter *adapter = netdev_priv(netdev);
 534         struct atl1c_hw *hw = &adapter->hw;
 535         int old_mtu   = netdev->mtu;
 536         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 537
 538         /* Fast Ethernet controller doesn't support jumbo packet */
 539         if (((hw->nic_type == athr_l2c ||
 540               hw->nic_type == athr_l2c_b ||
 541               hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
 542               max_frame < ETH_ZLEN + ETH_FCS_LEN ||
 543               max_frame > MAX_JUMBO_FRAME_SIZE) {
 544                 if (netif_msg_link(adapter))
 545                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 546                 return -EINVAL;
 547         }
 548         /* set MTU */
 549         if (old_mtu != new_mtu && netif_running(netdev)) {
 550                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 551                         msleep(1);
 552                 netdev->mtu = new_mtu;
 553                 adapter->hw.max_frame_size = new_mtu;
 554                 atl1c_set_rxbufsize(adapter, netdev);
 555                 atl1c_down(adapter);
 556                 netdev_update_features(netdev);
 557                 atl1c_up(adapter);
 558                 clear_bit(__AT_RESETTING, &adapter->flags);
 559         }
 560         return 0;
 561 }
 562
 563 /*
 564  *  caller should hold mdio_lock
 565  */
 566 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 567 {
 568         struct atl1c_adapter *adapter = netdev_priv(netdev);
 569         u16 result;
 570
 571         atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
 572         return result;
 573 }
 574
 575 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 576                              int reg_num, int val)
 577 {
 578         struct atl1c_adapter *adapter = netdev_priv(netdev);
 579
 580         atl1c_write_phy_reg(&adapter->hw, reg_num, val);
 581 }
 582
 583 static int atl1c_mii_ioctl(struct net_device *netdev,
 584                            struct ifreq *ifr, int cmd)
 585 {
 586         struct atl1c_adapter *adapter = netdev_priv(netdev);
 587         struct pci_dev *pdev = adapter->pdev;
 588         struct mii_ioctl_data *data = if_mii(ifr);
 589         unsigned long flags;
 590         int retval = 0;
 591
 592         if (!netif_running(netdev))
 593                 return -EINVAL;
 594
 595         spin_lock_irqsave(&adapter->mdio_lock, flags);
 596         switch (cmd) {
 597         case SIOCGMIIPHY:
 598                 data->phy_id = 0;
 599                 break;
 600
 601         case SIOCGMIIREG:
 602                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 603                                     &data->val_out)) {
 604                         retval = -EIO;
 605                         goto out;
 606                 }
 607                 break;
 608
 609         case SIOCSMIIREG:
 610                 if (data->reg_num & ~(0x1F)) {
 611                         retval = -EFAULT;
 612                         goto out;
 613                 }
 614
 615                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 616                                 data->reg_num, data->val_in);
 617                 if (atl1c_write_phy_reg(&adapter->hw,
 618                                      data->reg_num, data->val_in)) {
 619                         retval = -EIO;
 620                         goto out;
 621                 }
 622                 break;
 623
 624         default:
 625                 retval = -EOPNOTSUPP;
 626                 break;
 627         }
 628 out:
 629         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 630         return retval;
 631 }
 632
 633 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 634 {
 635         switch (cmd) {
 636         case SIOCGMIIPHY:
 637         case SIOCGMIIREG:
 638         case SIOCSMIIREG:
 639                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 640         default:
 641                 return -EOPNOTSUPP;
 642         }
 643 }
 644
 645 /**
 646  * atl1c_alloc_queues - Allocate memory for all rings
 647  * @adapter: board private structure to initialize
 648  *
 649  */
 650 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
 651 {
 652         return 0;
 653 }
 654
 655 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 656 {
 657         switch (hw->device_id) {
 658         case PCI_DEVICE_ID_ATTANSIC_L2C:
 659                 hw->nic_type = athr_l2c;
 660                 break;
 661         case PCI_DEVICE_ID_ATTANSIC_L1C:
 662                 hw->nic_type = athr_l1c;
 663                 break;
 664         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 665                 hw->nic_type = athr_l2c_b;
 666                 break;
 667         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 668                 hw->nic_type = athr_l2c_b2;
 669                 break;
 670         case PCI_DEVICE_ID_ATHEROS_L1D:
 671                 hw->nic_type = athr_l1d;
 672                 break;
 673         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 674                 hw->nic_type = athr_l1d_2;
 675                 break;
 676         default:
 677                 break;
 678         }
 679 }
 680
 681 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 682 {
 683         u32 link_ctrl_data;
 684
 685         atl1c_set_mac_type(hw);
 686         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 687
 688         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 689                          ATL1C_TXQ_MODE_ENHANCE;
 690         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 691                           ATL1C_ASPM_L1_SUPPORT;
 692         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 693
 694         if (hw->nic_type == athr_l1c ||
 695             hw->nic_type == athr_l1d ||
 696             hw->nic_type == athr_l1d_2)
 697                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 698         return 0;
 699 }
 700
 701 struct atl1c_platform_patch {
 702         u16 pci_did;
 703         u8  pci_revid;
 704         u16 subsystem_vid;
 705         u16 subsystem_did;
 706         u32 patch_flag;
 707 #define ATL1C_LINK_PATCH        0x1
 708 };
 709 static const struct atl1c_platform_patch plats[] = {
 710 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
 711 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
 712 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
 713 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
 714 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
 715 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
 716 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
 717 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
 718 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
 719 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
 720 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
 721 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
 722 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
 723 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
 724 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
 725 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
 726 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
 727 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
 728 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
 729 {0},
 730 };
 731
 732 static void atl1c_patch_assign(struct atl1c_hw *hw)
 733 {
 734         struct pci_dev  *pdev = hw->adapter->pdev;
 735         u32 misc_ctrl;
 736         int i = 0;
 737
 738         hw->msi_lnkpatch = false;
 739
 740         while (plats[i].pci_did != 0) {
 741                 if (plats[i].pci_did == hw->device_id &&
 742                     plats[i].pci_revid == hw->revision_id &&
 743                     plats[i].subsystem_vid == hw->subsystem_vendor_id &&
 744                     plats[i].subsystem_did == hw->subsystem_id) {
 745                         if (plats[i].patch_flag & ATL1C_LINK_PATCH)
 746                                 hw->msi_lnkpatch = true;
 747                 }
 748                 i++;
 749         }
 750
 751         if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
 752             hw->revision_id == L2CB_V21) {
 753                 /* config acess mode */
 754                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 755                                        REG_PCIE_DEV_MISC_CTRL);
 756                 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
 757                 misc_ctrl &= ~0x100;
 758                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 759                                        REG_PCIE_DEV_MISC_CTRL);
 760                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
 761         }
 762 }
 763 /**
 764  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 765  * @adapter: board private structure to initialize
 766  *
 767  * atl1c_sw_init initializes the Adapter private data structure.
 768  * Fields are initialized based on PCI device information and
 769  * OS network device settings (MTU size).
 770  */
 771 static int atl1c_sw_init(struct atl1c_adapter *adapter)
 772 {
 773         struct atl1c_hw *hw   = &adapter->hw;
 774         struct pci_dev  *pdev = adapter->pdev;
 775         u32 revision;
 776
 777
 778         adapter->wol = 0;
 779         device_set_wakeup_enable(&pdev->dev, false);
 780         adapter->link_speed = SPEED_0;
 781         adapter->link_duplex = FULL_DUPLEX;
 782         adapter->tpd_ring[0].count = 1024;
 783         adapter->rfd_ring.count = 512;
 784
 785         hw->vendor_id = pdev->vendor;
 786         hw->device_id = pdev->device;
 787         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 788         hw->subsystem_id = pdev->subsystem_device;
 789         pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
 790         hw->revision_id = revision & 0xFF;
 791         /* before link up, we assume hibernate is true */
 792         hw->hibernate = true;
 793         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 794         if (atl1c_setup_mac_funcs(hw) != 0) {
 795                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 796                 return -1;
 797         }
 798         atl1c_patch_assign(hw);
 799
 800         hw->intr_mask = IMR_NORMAL_MASK;
 801         hw->phy_configured = false;
 802         hw->preamble_len = 7;
 803         hw->max_frame_size = adapter->netdev->mtu;
 804         hw->autoneg_advertised = ADVERTISED_Autoneg;
 805         hw->indirect_tab = 0xE4E4E4E4;
 806         hw->base_cpu = 0;
 807
 808         hw->ict = 50000;                /* 100ms */
 809         hw->smb_timer = 200000;         /* 400ms */
 810         hw->rx_imt = 200;
 811         hw->tx_imt = 1000;
 812
 813         hw->tpd_burst = 5;
 814         hw->rfd_burst = 8;
 815         hw->dma_order = atl1c_dma_ord_out;
 816         hw->dmar_block = atl1c_dma_req_1024;
 817
 818         if (atl1c_alloc_queues(adapter)) {
 819                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 820                 return -ENOMEM;
 821         }
 822         /* TODO */
 823         atl1c_set_rxbufsize(adapter, adapter->netdev);
 824         atomic_set(&adapter->irq_sem, 1);
 825         spin_lock_init(&adapter->mdio_lock);
 826         spin_lock_init(&adapter->tx_lock);
 827         set_bit(__AT_DOWN, &adapter->flags);
 828
 829         return 0;
 830 }
 831
 832 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 833                                 struct atl1c_buffer *buffer_info, int in_irq)
 834 {
 835         u16 pci_driection;
 836         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 837                 return;
 838         if (buffer_info->dma) {
 839                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 840                         pci_driection = PCI_DMA_FROMDEVICE;
 841                 else
 842                         pci_driection = PCI_DMA_TODEVICE;
 843
 844                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 845                         pci_unmap_single(pdev, buffer_info->dma,
 846                                         buffer_info->length, pci_driection);
 847                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 848                         pci_unmap_page(pdev, buffer_info->dma,
 849                                         buffer_info->length, pci_driection);
 850         }
 851         if (buffer_info->skb) {
 852                 if (in_irq)
 853                         dev_kfree_skb_irq(buffer_info->skb);
 854                 else
 855                         dev_kfree_skb(buffer_info->skb);
 856         }
 857         buffer_info->dma = 0;
 858         buffer_info->skb = NULL;
 859         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 860 }
 861 /**
 862  * atl1c_clean_tx_ring - Free Tx-skb
 863  * @adapter: board private structure
 864  */
 865 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 866                                 enum atl1c_trans_queue type)
 867 {
 868         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 869         struct atl1c_buffer *buffer_info;
 870         struct pci_dev *pdev = adapter->pdev;
 871         u16 index, ring_count;
 872
 873         ring_count = tpd_ring->count;
 874         for (index = 0; index < ring_count; index++) {
 875                 buffer_info = &tpd_ring->buffer_info[index];
 876                 atl1c_clean_buffer(pdev, buffer_info, 0);
 877         }
 878
 879         /* Zero out Tx-buffers */
 880         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 881                 ring_count);
 882         atomic_set(&tpd_ring->next_to_clean, 0);
 883         tpd_ring->next_to_use = 0;
 884 }
 885
 886 /**
 887  * atl1c_clean_rx_ring - Free rx-reservation skbs
 888  * @adapter: board private structure
 889  */
 890 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 891 {
 892         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 893         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 894         struct atl1c_buffer *buffer_info;
 895         struct pci_dev *pdev = adapter->pdev;
 896         int j;
 897
 898         for (j = 0; j < rfd_ring->count; j++) {
 899                 buffer_info = &rfd_ring->buffer_info[j];
 900                 atl1c_clean_buffer(pdev, buffer_info, 0);
 901         }
 902         /* zero out the descriptor ring */
 903         memset(rfd_ring->desc, 0, rfd_ring->size);
 904         rfd_ring->next_to_clean = 0;
 905         rfd_ring->next_to_use = 0;
 906         rrd_ring->next_to_use = 0;
 907         rrd_ring->next_to_clean = 0;
 908 }
 909
 910 /*
 911  * Read / Write Ptr Initialize:
 912  */
 913 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 914 {
 915         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 916         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 917         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 918         struct atl1c_buffer *buffer_info;
 919         int i, j;
 920
 921         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 922                 tpd_ring[i].next_to_use = 0;
 923                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 924                 buffer_info = tpd_ring[i].buffer_info;
 925                 for (j = 0; j < tpd_ring->count; j++)
 926                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 927                                         ATL1C_BUFFER_FREE);
 928         }
 929         rfd_ring->next_to_use = 0;
 930         rfd_ring->next_to_clean = 0;
 931         rrd_ring->next_to_use = 0;
 932         rrd_ring->next_to_clean = 0;
 933         for (j = 0; j < rfd_ring->count; j++) {
 934                 buffer_info = &rfd_ring->buffer_info[j];
 935                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 936         }
 937 }
 938
 939 /**
 940  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 941  * @adapter: board private structure
 942  *
 943  * Free all transmit software resources
 944  */
 945 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 946 {
 947         struct pci_dev *pdev = adapter->pdev;
 948
 949         pci_free_consistent(pdev, adapter->ring_header.size,
 950                                         adapter->ring_header.desc,
 951                                         adapter->ring_header.dma);
 952         adapter->ring_header.desc = NULL;
 953
 954         /* Note: just free tdp_ring.buffer_info,
 955         *  it contain rfd_ring.buffer_info, do not double free */
 956         if (adapter->tpd_ring[0].buffer_info) {
 957                 kfree(adapter->tpd_ring[0].buffer_info);
 958                 adapter->tpd_ring[0].buffer_info = NULL;
 959         }
 960         if (adapter->rx_page) {
 961                 put_page(adapter->rx_page);
 962                 adapter->rx_page = NULL;
 963         }
 964 }
 965
 966 /**
 967  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 968  * @adapter: board private structure
 969  *
 970  * Return 0 on success, negative on failure
 971  */
 972 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 973 {
 974         struct pci_dev *pdev = adapter->pdev;
 975         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 976         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 977         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 978         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 979         int size;
 980         int i;
 981         int count = 0;
 982         int rx_desc_count = 0;
 983         u32 offset = 0;
 984
 985         rrd_ring->count = rfd_ring->count;
 986         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 987                 tpd_ring[i].count = tpd_ring[0].count;
 988
 989         /* 2 tpd queue, one high priority queue,
 990          * another normal priority queue */
 991         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 992                 rfd_ring->count);
 993         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 994         if (unlikely(!tpd_ring->buffer_info))
 995                 goto err_nomem;
 996
 997         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 998                 tpd_ring[i].buffer_info =
 999                         (tpd_ring->buffer_info + count);
1000                 count += tpd_ring[i].count;
1001         }
1002
1003         rfd_ring->buffer_info =
1004                 (tpd_ring->buffer_info + count);
1005         count += rfd_ring->count;
1006         rx_desc_count += rfd_ring->count;
1007
1008         /*
1009          * real ring DMA buffer
1010          * each ring/block may need up to 8 bytes for alignment, hence the
1011          * additional bytes tacked onto the end.
1012          */
1013         ring_header->size = size =
1014                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1015                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1016                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1017                 8 * 4;
1018
1019         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1020                                 &ring_header->dma);
1021         if (unlikely(!ring_header->desc)) {
1022                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1023                 goto err_nomem;
1024         }
1025         memset(ring_header->desc, 0, ring_header->size);
1026         /* init TPD ring */
1027
1028         tpd_ring[0].dma = roundup(ring_header->dma, 8);
1029         offset = tpd_ring[0].dma - ring_header->dma;
1030         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1031                 tpd_ring[i].dma = ring_header->dma + offset;
1032                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1033                 tpd_ring[i].size =
1034                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1035                 offset += roundup(tpd_ring[i].size, 8);
1036         }
1037         /* init RFD ring */
1038         rfd_ring->dma = ring_header->dma + offset;
1039         rfd_ring->desc = (u8 *) ring_header->desc + offset;
1040         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1041         offset += roundup(rfd_ring->size, 8);
1042
1043         /* init RRD ring */
1044         rrd_ring->dma = ring_header->dma + offset;
1045         rrd_ring->desc = (u8 *) ring_header->desc + offset;
1046         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1047                 rrd_ring->count;
1048         offset += roundup(rrd_ring->size, 8);
1049
1050         return 0;
1051
1052 err_nomem:
1053         kfree(tpd_ring->buffer_info);
1054         return -ENOMEM;
1055 }
1056
1057 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1058 {
1059         struct atl1c_hw *hw = &adapter->hw;
1060         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1061         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1062         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1063                                 adapter->tpd_ring;
1064
1065         /* TPD */
1066         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1067                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1068                                 AT_DMA_HI_ADDR_MASK) >> 32));
1069         /* just enable normal priority TX queue */
1070         AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1071                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1072                                 AT_DMA_LO_ADDR_MASK));
1073         AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1074                         (u32)(tpd_ring[atl1c_trans_high].dma &
1075                                 AT_DMA_LO_ADDR_MASK));
1076         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1077                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1078
1079
1080         /* RFD */
1081         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1082                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1083         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1084                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1085
1086         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1087                         rfd_ring->count & RFD_RING_SIZE_MASK);
1088         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1089                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1090
1091         /* RRD */
1092         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1093                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1094         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1095                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1096
1097         if (hw->nic_type == athr_l2c_b) {
1098                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1099                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1100                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1101                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1102                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1103                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1104                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1105                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1106         }
1107         /* Load all of base address above */
1108         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1109 }
1110
1111 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1112 {
1113         struct atl1c_hw *hw = &adapter->hw;
1114         int max_pay_load;
1115         u16 tx_offload_thresh;
1116         u32 txq_ctrl_data;
1117
1118         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1119         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1120                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1121         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1122         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1123         /*
1124          * if BIOS had changed the dam-read-max-length to an invalid value,
1125          * restore it to default value
1126          */
1127         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1128                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1129                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1130         }
1131         txq_ctrl_data =
1132                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1133                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1134
1135         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1136 }
1137
1138 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1139 {
1140         struct atl1c_hw *hw = &adapter->hw;
1141         u32 rxq_ctrl_data;
1142
1143         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1144                         RXQ_RFD_BURST_NUM_SHIFT;
1145
1146         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1147                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1148
1149         /* aspm for gigabit */
1150         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1151                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1152                         ASPM_THRUPUT_LIMIT_100M);
1153
1154         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1155 }
1156
1157 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1158 {
1159         struct atl1c_hw *hw = &adapter->hw;
1160         u32 dma_ctrl_data;
1161
1162         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1163                 DMA_CTRL_RREQ_PRI_DATA |
1164                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1165                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1166                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1167
1168         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1169 }
1170
1171 /*
1172  * Stop the mac, transmit and receive units
1173  * hw - Struct containing variables accessed by shared code
1174  * return : 0  or  idle status (if error)
1175  */
1176 static int atl1c_stop_mac(struct atl1c_hw *hw)
1177 {
1178         u32 data;
1179
1180         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1181         data &= ~RXQ_CTRL_EN;
1182         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1183
1184         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1185         data &= ~TXQ_CTRL_EN;
1186         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1187
1188         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1189
1190         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1191         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1192         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1193
1194         return (int)atl1c_wait_until_idle(hw,
1195                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1196 }
1197
1198 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1199 {
1200         struct atl1c_hw *hw = &adapter->hw;
1201         u32 mac, txq, rxq;
1202
1203         hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1204         hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1205                 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1206
1207         AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1208         AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1209         AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1210
1211         txq |= TXQ_CTRL_EN;
1212         rxq |= RXQ_CTRL_EN;
1213         mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1214                MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1215                MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1216                MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1217                MAC_CTRL_HASH_ALG_CRC32;
1218         if (hw->mac_duplex)
1219                 mac |= MAC_CTRL_DUPLX;
1220         else
1221                 mac &= ~MAC_CTRL_DUPLX;
1222         mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1223         mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1224
1225         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1226         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1227         AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1228 }
1229
1230 /*
1231  * Reset the transmit and receive units; mask and clear all interrupts.
1232  * hw - Struct containing variables accessed by shared code
1233  * return : 0  or  idle status (if error)
1234  */
1235 static int atl1c_reset_mac(struct atl1c_hw *hw)
1236 {
1237         struct atl1c_adapter *adapter = hw->adapter;
1238         struct pci_dev *pdev = adapter->pdev;
1239         u32 ctrl_data = 0;
1240
1241         atl1c_stop_mac(hw);
1242         /*
1243          * Issue Soft Reset to the MAC.  This will reset the chip's
1244          * transmit, receive, DMA.  It will not effect
1245          * the current PCI configuration.  The global reset bit is self-
1246          * clearing, and should clear within a microsecond.
1247          */
1248         AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1249         ctrl_data |= MASTER_CTRL_OOB_DIS;
1250         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1251
1252         AT_WRITE_FLUSH(hw);
1253         msleep(10);
1254         /* Wait at least 10ms for All module to be Idle */
1255
1256         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1257                 dev_err(&pdev->dev,
1258                         "MAC state machine can't be idle since"
1259                         " disabled for 10ms second\n");
1260                 return -1;
1261         }
1262         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1263
1264         /* driver control speed/duplex */
1265         AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1266         AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1267
1268         /* clk switch setting */
1269         AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1270         switch (hw->nic_type) {
1271         case athr_l2c_b:
1272                 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1273                                 SERDES_MAC_CLK_SLOWDOWN);
1274                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1275                 break;
1276         case athr_l2c_b2:
1277         case athr_l1d_2:
1278                 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1279                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1280                 break;
1281         default:
1282                 break;
1283         }
1284
1285         return 0;
1286 }
1287
1288 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1289 {
1290         u16 ctrl_flags = hw->ctrl_flags;
1291
1292         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1293         atl1c_set_aspm(hw, SPEED_0);
1294         hw->ctrl_flags = ctrl_flags;
1295 }
1296
1297 /*
1298  * Set ASPM state.
1299  * Enable/disable L0s/L1 depend on link state.
1300  */
1301 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1302 {
1303         u32 pm_ctrl_data;
1304         u32 link_l1_timer;
1305
1306         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1307         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1308                           PM_CTRL_ASPM_L0S_EN |
1309                           PM_CTRL_MAC_ASPM_CHK);
1310         /* L1 timer */
1311         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1312                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1313                 link_l1_timer =
1314                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1315                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1316                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1317                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1318         } else {
1319                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1320                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1321                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1322                         link_l1_timer = 1;
1323                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1324                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1325         }
1326
1327         /* L0S/L1 enable */
1328         if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1329                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1330         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1331                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1332
1333         /* l2cb & l1d & l2cb2 & l1d2 */
1334         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1335             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1336                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1337                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1338                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1339                                 PM_CTRL_SERDES_PD_EX_L1 |
1340                                 PM_CTRL_CLK_SWH_L1;
1341                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1342                                   PM_CTRL_SERDES_PLL_L1_EN |
1343                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1344                                   PM_CTRL_SA_DLY_EN |
1345                                   PM_CTRL_HOTRST);
1346                 /* disable l0s if link down or l2cb */
1347                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1348                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1349         } else { /* l1c */
1350                 pm_ctrl_data =
1351                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1352                 if (link_speed != SPEED_0) {
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_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1357                                           PM_CTRL_CLK_SWH_L1 |
1358                                           PM_CTRL_ASPM_L0S_EN |
1359                                           PM_CTRL_ASPM_L1_EN);
1360                 } else { /* link down */
1361                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1362                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1363                                           PM_CTRL_SERDES_PLL_L1_EN |
1364                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1365                                           PM_CTRL_ASPM_L0S_EN);
1366                 }
1367         }
1368         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1369
1370         return;
1371 }
1372
1373 /**
1374  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1375  * @adapter: board private structure
1376  *
1377  * Configure the Tx /Rx unit of the MAC after a reset.
1378  */
1379 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1380 {
1381         struct atl1c_hw *hw = &adapter->hw;
1382         u32 master_ctrl_data = 0;
1383         u32 intr_modrt_data;
1384         u32 data;
1385
1386         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1387         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1388                               MASTER_CTRL_RX_ITIMER_EN |
1389                               MASTER_CTRL_INT_RDCLR);
1390         /* clear interrupt status */
1391         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1392         /*  Clear any WOL status */
1393         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1394         /* set Interrupt Clear Timer
1395          * HW will enable self to assert interrupt event to system after
1396          * waiting x-time for software to notify it accept interrupt.
1397          */
1398
1399         data = CLK_GATING_EN_ALL;
1400         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1401                 if (hw->nic_type == athr_l2c_b)
1402                         data &= ~CLK_GATING_RXMAC_EN;
1403         } else
1404                 data = 0;
1405         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1406
1407         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1408                 hw->ict & INT_RETRIG_TIMER_MASK);
1409
1410         atl1c_configure_des_ring(adapter);
1411
1412         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1413                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1414                                         IRQ_MODRT_TX_TIMER_SHIFT;
1415                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1416                                         IRQ_MODRT_RX_TIMER_SHIFT;
1417                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1418                 master_ctrl_data |=
1419                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1420         }
1421
1422         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1423                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1424
1425         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1426         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1427
1428         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1429                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1430
1431         /* set MTU */
1432         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1433                         VLAN_HLEN + ETH_FCS_LEN);
1434
1435         atl1c_configure_tx(adapter);
1436         atl1c_configure_rx(adapter);
1437         atl1c_configure_dma(adapter);
1438
1439         return 0;
1440 }
1441
1442 static int atl1c_configure(struct atl1c_adapter *adapter)
1443 {
1444         struct net_device *netdev = adapter->netdev;
1445         int num;
1446
1447         atl1c_init_ring_ptrs(adapter);
1448         atl1c_set_multi(netdev);
1449         atl1c_restore_vlan(adapter);
1450
1451         num = atl1c_alloc_rx_buffer(adapter);
1452         if (unlikely(num == 0))
1453                 return -ENOMEM;
1454
1455         if (atl1c_configure_mac(adapter))
1456                 return -EIO;
1457
1458         return 0;
1459 }
1460
1461 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1462 {
1463         u16 hw_reg_addr = 0;
1464         unsigned long *stats_item = NULL;
1465         u32 data;
1466
1467         /* update rx status */
1468         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1469         stats_item  = &adapter->hw_stats.rx_ok;
1470         while (hw_reg_addr <= REG_MAC_RX_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 /* update tx status */
1477         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1478         stats_item  = &adapter->hw_stats.tx_ok;
1479         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1480                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1481                 *stats_item += data;
1482                 stats_item++;
1483                 hw_reg_addr += 4;
1484         }
1485 }
1486
1487 /**
1488  * atl1c_get_stats - Get System Network Statistics
1489  * @netdev: network interface device structure
1490  *
1491  * Returns the address of the device statistics structure.
1492  * The statistics are actually updated from the timer callback.
1493  */
1494 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1495 {
1496         struct atl1c_adapter *adapter = netdev_priv(netdev);
1497         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1498         struct net_device_stats *net_stats = &netdev->stats;
1499
1500         atl1c_update_hw_stats(adapter);
1501         net_stats->rx_packets = hw_stats->rx_ok;
1502         net_stats->tx_packets = hw_stats->tx_ok;
1503         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1504         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1505         net_stats->multicast  = hw_stats->rx_mcast;
1506         net_stats->collisions = hw_stats->tx_1_col +
1507                                 hw_stats->tx_2_col * 2 +
1508                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1509         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1510                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1511                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1512         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1513         net_stats->rx_length_errors = hw_stats->rx_len_err;
1514         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1515         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1516         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1517
1518         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1519
1520         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1521                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1522         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1523         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1524         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1525
1526         return net_stats;
1527 }
1528
1529 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1530 {
1531         u16 phy_data;
1532
1533         spin_lock(&adapter->mdio_lock);
1534         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1535         spin_unlock(&adapter->mdio_lock);
1536 }
1537
1538 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1539                                 enum atl1c_trans_queue type)
1540 {
1541         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1542         struct atl1c_buffer *buffer_info;
1543         struct pci_dev *pdev = adapter->pdev;
1544         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1545         u16 hw_next_to_clean;
1546         u16 reg;
1547
1548         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1549
1550         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1551
1552         while (next_to_clean != hw_next_to_clean) {
1553                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1554                 atl1c_clean_buffer(pdev, buffer_info, 1);
1555                 if (++next_to_clean == tpd_ring->count)
1556                         next_to_clean = 0;
1557                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1558         }
1559
1560         if (netif_queue_stopped(adapter->netdev) &&
1561                         netif_carrier_ok(adapter->netdev)) {
1562                 netif_wake_queue(adapter->netdev);
1563         }
1564
1565         return true;
1566 }
1567
1568 /**
1569  * atl1c_intr - Interrupt Handler
1570  * @irq: interrupt number
1571  * @data: pointer to a network interface device structure
1572  */
1573 static irqreturn_t atl1c_intr(int irq, void *data)
1574 {
1575         struct net_device *netdev  = data;
1576         struct atl1c_adapter *adapter = netdev_priv(netdev);
1577         struct pci_dev *pdev = adapter->pdev;
1578         struct atl1c_hw *hw = &adapter->hw;
1579         int max_ints = AT_MAX_INT_WORK;
1580         int handled = IRQ_NONE;
1581         u32 status;
1582         u32 reg_data;
1583
1584         do {
1585                 AT_READ_REG(hw, REG_ISR, &reg_data);
1586                 status = reg_data & hw->intr_mask;
1587
1588                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1589                         if (max_ints != AT_MAX_INT_WORK)
1590                                 handled = IRQ_HANDLED;
1591                         break;
1592                 }
1593                 /* link event */
1594                 if (status & ISR_GPHY)
1595                         atl1c_clear_phy_int(adapter);
1596                 /* Ack ISR */
1597                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1598                 if (status & ISR_RX_PKT) {
1599                         if (likely(napi_schedule_prep(&adapter->napi))) {
1600                                 hw->intr_mask &= ~ISR_RX_PKT;
1601                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1602                                 __napi_schedule(&adapter->napi);
1603                         }
1604                 }
1605                 if (status & ISR_TX_PKT)
1606                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1607
1608                 handled = IRQ_HANDLED;
1609                 /* check if PCIE PHY Link down */
1610                 if (status & ISR_ERROR) {
1611                         if (netif_msg_hw(adapter))
1612                                 dev_err(&pdev->dev,
1613                                         "atl1c hardware error (status = 0x%x)\n",
1614                                         status & ISR_ERROR);
1615                         /* reset MAC */
1616                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1617                         schedule_work(&adapter->common_task);
1618                         return IRQ_HANDLED;
1619                 }
1620
1621                 if (status & ISR_OVER)
1622                         if (netif_msg_intr(adapter))
1623                                 dev_warn(&pdev->dev,
1624                                         "TX/RX overflow (status = 0x%x)\n",
1625                                         status & ISR_OVER);
1626
1627                 /* link event */
1628                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1629                         netdev->stats.tx_carrier_errors++;
1630                         atl1c_link_chg_event(adapter);
1631                         break;
1632                 }
1633
1634         } while (--max_ints > 0);
1635         /* re-enable Interrupt*/
1636         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1637         return handled;
1638 }
1639
1640 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1641                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1642 {
1643         /*
1644          * The pid field in RRS in not correct sometimes, so we
1645          * cannot figure out if the packet is fragmented or not,
1646          * so we tell the KERNEL CHECKSUM_NONE
1647          */
1648         skb_checksum_none_assert(skb);
1649 }
1650
1651 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1652 {
1653         struct sk_buff *skb;
1654         struct page *page;
1655
1656         if (adapter->rx_frag_size > PAGE_SIZE)
1657                 return netdev_alloc_skb(adapter->netdev,
1658                                         adapter->rx_buffer_len);
1659
1660         page = adapter->rx_page;
1661         if (!page) {
1662                 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1663                 if (unlikely(!page))
1664                         return NULL;
1665                 adapter->rx_page_offset = 0;
1666         }
1667
1668         skb = build_skb(page_address(page) + adapter->rx_page_offset,
1669                         adapter->rx_frag_size);
1670         if (likely(skb)) {
1671                 adapter->rx_page_offset += adapter->rx_frag_size;
1672                 if (adapter->rx_page_offset >= PAGE_SIZE)
1673                         adapter->rx_page = NULL;
1674                 else
1675                         get_page(page);
1676         }
1677         return skb;
1678 }
1679
1680 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1681 {
1682         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1683         struct pci_dev *pdev = adapter->pdev;
1684         struct atl1c_buffer *buffer_info, *next_info;
1685         struct sk_buff *skb;
1686         void *vir_addr = NULL;
1687         u16 num_alloc = 0;
1688         u16 rfd_next_to_use, next_next;
1689         struct atl1c_rx_free_desc *rfd_desc;
1690         dma_addr_t mapping;
1691
1692         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1693         if (++next_next == rfd_ring->count)
1694                 next_next = 0;
1695         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1696         next_info = &rfd_ring->buffer_info[next_next];
1697
1698         while (next_info->flags & ATL1C_BUFFER_FREE) {
1699                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1700
1701                 skb = atl1c_alloc_skb(adapter);
1702                 if (unlikely(!skb)) {
1703                         if (netif_msg_rx_err(adapter))
1704                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1705                         break;
1706                 }
1707
1708                 /*
1709                  * Make buffer alignment 2 beyond a 16 byte boundary
1710                  * this will result in a 16 byte aligned IP header after
1711                  * the 14 byte MAC header is removed
1712                  */
1713                 vir_addr = skb->data;
1714                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1715                 buffer_info->skb = skb;
1716                 buffer_info->length = adapter->rx_buffer_len;
1717                 mapping = pci_map_single(pdev, vir_addr,
1718                                                 buffer_info->length,
1719                                                 PCI_DMA_FROMDEVICE);
1720                 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1721                         dev_kfree_skb(skb);
1722                         buffer_info->skb = NULL;
1723                         buffer_info->length = 0;
1724                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1725                         netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1726                         break;
1727                 }
1728                 buffer_info->dma = mapping;
1729                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1730                         ATL1C_PCIMAP_FROMDEVICE);
1731                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1732                 rfd_next_to_use = next_next;
1733                 if (++next_next == rfd_ring->count)
1734                         next_next = 0;
1735                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1736                 next_info = &rfd_ring->buffer_info[next_next];
1737                 num_alloc++;
1738         }
1739
1740         if (num_alloc) {
1741                 /* TODO: update mailbox here */
1742                 wmb();
1743                 rfd_ring->next_to_use = rfd_next_to_use;
1744                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1745                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1746         }
1747
1748         return num_alloc;
1749 }
1750
1751 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1752                         struct  atl1c_recv_ret_status *rrs, u16 num)
1753 {
1754         u16 i;
1755         /* the relationship between rrd and rfd is one map one */
1756         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1757                                         rrd_ring->next_to_clean)) {
1758                 rrs->word3 &= ~RRS_RXD_UPDATED;
1759                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1760                         rrd_ring->next_to_clean = 0;
1761         }
1762 }
1763
1764 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1765         struct atl1c_recv_ret_status *rrs, u16 num)
1766 {
1767         u16 i;
1768         u16 rfd_index;
1769         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1770
1771         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1772                         RRS_RX_RFD_INDEX_MASK;
1773         for (i = 0; i < num; i++) {
1774                 buffer_info[rfd_index].skb = NULL;
1775                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1776                                         ATL1C_BUFFER_FREE);
1777                 if (++rfd_index == rfd_ring->count)
1778                         rfd_index = 0;
1779         }
1780         rfd_ring->next_to_clean = rfd_index;
1781 }
1782
1783 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1784                    int *work_done, int work_to_do)
1785 {
1786         u16 rfd_num, rfd_index;
1787         u16 count = 0;
1788         u16 length;
1789         struct pci_dev *pdev = adapter->pdev;
1790         struct net_device *netdev  = adapter->netdev;
1791         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1792         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1793         struct sk_buff *skb;
1794         struct atl1c_recv_ret_status *rrs;
1795         struct atl1c_buffer *buffer_info;
1796
1797         while (1) {
1798                 if (*work_done >= work_to_do)
1799                         break;
1800                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1801                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1802                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1803                                 RRS_RX_RFD_CNT_MASK;
1804                         if (unlikely(rfd_num != 1))
1805                                 /* TODO support mul rfd*/
1806                                 if (netif_msg_rx_err(adapter))
1807                                         dev_warn(&pdev->dev,
1808                                                 "Multi rfd not support yet!\n");
1809                         goto rrs_checked;
1810                 } else {
1811                         break;
1812                 }
1813 rrs_checked:
1814                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1815                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1816                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1817                                 if (netif_msg_rx_err(adapter))
1818                                         dev_warn(&pdev->dev,
1819                                                 "wrong packet! rrs word3 is %x\n",
1820                                                 rrs->word3);
1821                         continue;
1822                 }
1823
1824                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1825                                 RRS_PKT_SIZE_MASK);
1826                 /* Good Receive */
1827                 if (likely(rfd_num == 1)) {
1828                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1829                                         RRS_RX_RFD_INDEX_MASK;
1830                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1831                         pci_unmap_single(pdev, buffer_info->dma,
1832                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1833                         skb = buffer_info->skb;
1834                 } else {
1835                         /* TODO */
1836                         if (netif_msg_rx_err(adapter))
1837                                 dev_warn(&pdev->dev,
1838                                         "Multi rfd not support yet!\n");
1839                         break;
1840                 }
1841                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1842                 skb_put(skb, length - ETH_FCS_LEN);
1843                 skb->protocol = eth_type_trans(skb, netdev);
1844                 atl1c_rx_checksum(adapter, skb, rrs);
1845                 if (rrs->word3 & RRS_VLAN_INS) {
1846                         u16 vlan;
1847
1848                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1849                         vlan = le16_to_cpu(vlan);
1850                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1851                 }
1852                 netif_receive_skb(skb);
1853
1854                 (*work_done)++;
1855                 count++;
1856         }
1857         if (count)
1858                 atl1c_alloc_rx_buffer(adapter);
1859 }
1860
1861 /**
1862  * atl1c_clean - NAPI Rx polling callback
1863  */
1864 static int atl1c_clean(struct napi_struct *napi, int budget)
1865 {
1866         struct atl1c_adapter *adapter =
1867                         container_of(napi, struct atl1c_adapter, napi);
1868         int work_done = 0;
1869
1870         /* Keep link state information with original netdev */
1871         if (!netif_carrier_ok(adapter->netdev))
1872                 goto quit_polling;
1873         /* just enable one RXQ */
1874         atl1c_clean_rx_irq(adapter, &work_done, budget);
1875
1876         if (work_done < budget) {
1877 quit_polling:
1878                 napi_complete(napi);
1879                 adapter->hw.intr_mask |= ISR_RX_PKT;
1880                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1881         }
1882         return work_done;
1883 }
1884
1885 #ifdef CONFIG_NET_POLL_CONTROLLER
1886
1887 /*
1888  * Polling 'interrupt' - used by things like netconsole to send skbs
1889  * without having to re-enable interrupts. It's not called while
1890  * the interrupt routine is executing.
1891  */
1892 static void atl1c_netpoll(struct net_device *netdev)
1893 {
1894         struct atl1c_adapter *adapter = netdev_priv(netdev);
1895
1896         disable_irq(adapter->pdev->irq);
1897         atl1c_intr(adapter->pdev->irq, netdev);
1898         enable_irq(adapter->pdev->irq);
1899 }
1900 #endif
1901
1902 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1903 {
1904         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1905         u16 next_to_use = 0;
1906         u16 next_to_clean = 0;
1907
1908         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1909         next_to_use   = tpd_ring->next_to_use;
1910
1911         return (u16)(next_to_clean > next_to_use) ?
1912                 (next_to_clean - next_to_use - 1) :
1913                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1914 }
1915
1916 /*
1917  * get next usable tpd
1918  * Note: should call atl1c_tdp_avail to make sure
1919  * there is enough tpd to use
1920  */
1921 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1922         enum atl1c_trans_queue type)
1923 {
1924         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1925         struct atl1c_tpd_desc *tpd_desc;
1926         u16 next_to_use = 0;
1927
1928         next_to_use = tpd_ring->next_to_use;
1929         if (++tpd_ring->next_to_use == tpd_ring->count)
1930                 tpd_ring->next_to_use = 0;
1931         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1932         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1933         return  tpd_desc;
1934 }
1935
1936 static struct atl1c_buffer *
1937 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1938 {
1939         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1940
1941         return &tpd_ring->buffer_info[tpd -
1942                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1943 }
1944
1945 /* Calculate the transmit packet descript needed*/
1946 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1947 {
1948         u16 tpd_req;
1949         u16 proto_hdr_len = 0;
1950
1951         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1952
1953         if (skb_is_gso(skb)) {
1954                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1955                 if (proto_hdr_len < skb_headlen(skb))
1956                         tpd_req++;
1957                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1958                         tpd_req++;
1959         }
1960         return tpd_req;
1961 }
1962
1963 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1964                           struct sk_buff *skb,
1965                           struct atl1c_tpd_desc **tpd,
1966                           enum atl1c_trans_queue type)
1967 {
1968         struct pci_dev *pdev = adapter->pdev;
1969         u8 hdr_len;
1970         u32 real_len;
1971         unsigned short offload_type;
1972         int err;
1973
1974         if (skb_is_gso(skb)) {
1975                 if (skb_header_cloned(skb)) {
1976                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1977                         if (unlikely(err))
1978                                 return -1;
1979                 }
1980                 offload_type = skb_shinfo(skb)->gso_type;
1981
1982                 if (offload_type & SKB_GSO_TCPV4) {
1983                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1984                                         + ntohs(ip_hdr(skb)->tot_len));
1985
1986                         if (real_len < skb->len)
1987                                 pskb_trim(skb, real_len);
1988
1989                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1990                         if (unlikely(skb->len == hdr_len)) {
1991                                 /* only xsum need */
1992                                 if (netif_msg_tx_queued(adapter))
1993                                         dev_warn(&pdev->dev,
1994                                                 "IPV4 tso with zero data??\n");
1995                                 goto check_sum;
1996                         } else {
1997                                 ip_hdr(skb)->check = 0;
1998                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1999                                                         ip_hdr(skb)->saddr,
2000                                                         ip_hdr(skb)->daddr,
2001                                                         0, IPPROTO_TCP, 0);
2002                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2003                         }
2004                 }
2005
2006                 if (offload_type & SKB_GSO_TCPV6) {
2007                         struct atl1c_tpd_ext_desc *etpd =
2008                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2009
2010                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2011                         *tpd = atl1c_get_tpd(adapter, type);
2012                         ipv6_hdr(skb)->payload_len = 0;
2013                         /* check payload == 0 byte ? */
2014                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2015                         if (unlikely(skb->len == hdr_len)) {
2016                                 /* only xsum need */
2017                                 if (netif_msg_tx_queued(adapter))
2018                                         dev_warn(&pdev->dev,
2019                                                 "IPV6 tso with zero data??\n");
2020                                 goto check_sum;
2021                         } else
2022                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2023                                                 &ipv6_hdr(skb)->saddr,
2024                                                 &ipv6_hdr(skb)->daddr,
2025                                                 0, IPPROTO_TCP, 0);
2026                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2027                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2028                         etpd->pkt_len = cpu_to_le32(skb->len);
2029                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2030                 }
2031
2032                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2033                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2034                                 TPD_TCPHDR_OFFSET_SHIFT;
2035                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2036                                 TPD_MSS_SHIFT;
2037                 return 0;
2038         }
2039
2040 check_sum:
2041         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2042                 u8 css, cso;
2043                 cso = skb_checksum_start_offset(skb);
2044
2045                 if (unlikely(cso & 0x1)) {
2046                         if (netif_msg_tx_err(adapter))
2047                                 dev_err(&adapter->pdev->dev,
2048                                         "payload offset should not an event number\n");
2049                         return -1;
2050                 } else {
2051                         css = cso + skb->csum_offset;
2052
2053                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2054                                         TPD_PLOADOFFSET_SHIFT;
2055                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2056                                         TPD_CCSUM_OFFSET_SHIFT;
2057                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2058                 }
2059         }
2060         return 0;
2061 }
2062
2063 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2064                               struct atl1c_tpd_desc *first_tpd,
2065                               enum atl1c_trans_queue type)
2066 {
2067         struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2068         struct atl1c_buffer *buffer_info;
2069         struct atl1c_tpd_desc *tpd;
2070         u16 first_index, index;
2071
2072         first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2073         index = first_index;
2074         while (index != tpd_ring->next_to_use) {
2075                 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2076                 buffer_info = &tpd_ring->buffer_info[index];
2077                 atl1c_clean_buffer(adpt->pdev, buffer_info, 0);
2078                 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2079                 if (++index == tpd_ring->count)
2080                         index = 0;
2081         }
2082         tpd_ring->next_to_use = first_index;
2083 }
2084
2085 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2086                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2087                         enum atl1c_trans_queue type)
2088 {
2089         struct atl1c_tpd_desc *use_tpd = NULL;
2090         struct atl1c_buffer *buffer_info = NULL;
2091         u16 buf_len = skb_headlen(skb);
2092         u16 map_len = 0;
2093         u16 mapped_len = 0;
2094         u16 hdr_len = 0;
2095         u16 nr_frags;
2096         u16 f;
2097         int tso;
2098
2099         nr_frags = skb_shinfo(skb)->nr_frags;
2100         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2101         if (tso) {
2102                 /* TSO */
2103                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2104                 use_tpd = tpd;
2105
2106                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2107                 buffer_info->length = map_len;
2108                 buffer_info->dma = pci_map_single(adapter->pdev,
2109                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2110                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2111                                                    buffer_info->dma)))
2112                         goto err_dma;
2113                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2114                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2115                         ATL1C_PCIMAP_TODEVICE);
2116                 mapped_len += map_len;
2117                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2118                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2119         }
2120
2121         if (mapped_len < buf_len) {
2122                 /* mapped_len == 0, means we should use the first tpd,
2123                    which is given by caller  */
2124                 if (mapped_len == 0)
2125                         use_tpd = tpd;
2126                 else {
2127                         use_tpd = atl1c_get_tpd(adapter, type);
2128                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2129                 }
2130                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2131                 buffer_info->length = buf_len - mapped_len;
2132                 buffer_info->dma =
2133                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2134                                         buffer_info->length, PCI_DMA_TODEVICE);
2135                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2136                                                    buffer_info->dma)))
2137                         goto err_dma;
2138
2139                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2140                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2141                         ATL1C_PCIMAP_TODEVICE);
2142                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2143                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2144         }
2145
2146         for (f = 0; f < nr_frags; f++) {
2147                 struct skb_frag_struct *frag;
2148
2149                 frag = &skb_shinfo(skb)->frags[f];
2150
2151                 use_tpd = atl1c_get_tpd(adapter, type);
2152                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2153
2154                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2155                 buffer_info->length = skb_frag_size(frag);
2156                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2157                                                     frag, 0,
2158                                                     buffer_info->length,
2159                                                     DMA_TO_DEVICE);
2160                 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2161                         goto err_dma;
2162
2163                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2164                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2165                         ATL1C_PCIMAP_TODEVICE);
2166                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2167                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2168         }
2169
2170         /* The last tpd */
2171         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2172         /* The last buffer info contain the skb address,
2173            so it will be free after unmap */
2174         buffer_info->skb = skb;
2175
2176         return 0;
2177
2178 err_dma:
2179         buffer_info->dma = 0;
2180         buffer_info->length = 0;
2181         return -1;
2182 }
2183
2184 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2185                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2186 {
2187         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2188         u16 reg;
2189
2190         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2191         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2192 }
2193
2194 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2195                                           struct net_device *netdev)
2196 {
2197         struct atl1c_adapter *adapter = netdev_priv(netdev);
2198         unsigned long flags;
2199         u16 tpd_req = 1;
2200         struct atl1c_tpd_desc *tpd;
2201         enum atl1c_trans_queue type = atl1c_trans_normal;
2202
2203         if (test_bit(__AT_DOWN, &adapter->flags)) {
2204                 dev_kfree_skb_any(skb);
2205                 return NETDEV_TX_OK;
2206         }
2207
2208         tpd_req = atl1c_cal_tpd_req(skb);
2209         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2210                 if (netif_msg_pktdata(adapter))
2211                         dev_info(&adapter->pdev->dev, "tx locked\n");
2212                 return NETDEV_TX_LOCKED;
2213         }
2214
2215         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2216                 /* no enough descriptor, just stop queue */
2217                 netif_stop_queue(netdev);
2218                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2219                 return NETDEV_TX_BUSY;
2220         }
2221
2222         tpd = atl1c_get_tpd(adapter, type);
2223
2224         /* do TSO and check sum */
2225         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2226                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2227                 dev_kfree_skb_any(skb);
2228                 return NETDEV_TX_OK;
2229         }
2230
2231         if (unlikely(vlan_tx_tag_present(skb))) {
2232                 u16 vlan = vlan_tx_tag_get(skb);
2233                 __le16 tag;
2234
2235                 vlan = cpu_to_le16(vlan);
2236                 AT_VLAN_TO_TAG(vlan, tag);
2237                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2238                 tpd->vlan_tag = tag;
2239         }
2240
2241         if (skb_network_offset(skb) != ETH_HLEN)
2242                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2243
2244         if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2245                 netif_info(adapter, tx_done, adapter->netdev,
2246                            "tx-skb droppted due to dma error\n");
2247                 /* roll back tpd/buffer */
2248                 atl1c_tx_rollback(adapter, tpd, type);
2249                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2250                 dev_kfree_skb(skb);
2251         } else {
2252                 atl1c_tx_queue(adapter, skb, tpd, type);
2253                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2254         }
2255
2256         return NETDEV_TX_OK;
2257 }
2258
2259 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2260 {
2261         struct net_device *netdev = adapter->netdev;
2262
2263         free_irq(adapter->pdev->irq, netdev);
2264
2265         if (adapter->have_msi)
2266                 pci_disable_msi(adapter->pdev);
2267 }
2268
2269 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2270 {
2271         struct pci_dev    *pdev   = adapter->pdev;
2272         struct net_device *netdev = adapter->netdev;
2273         int flags = 0;
2274         int err = 0;
2275
2276         adapter->have_msi = true;
2277         err = pci_enable_msi(adapter->pdev);
2278         if (err) {
2279                 if (netif_msg_ifup(adapter))
2280                         dev_err(&pdev->dev,
2281                                 "Unable to allocate MSI interrupt Error: %d\n",
2282                                 err);
2283                 adapter->have_msi = false;
2284         }
2285
2286         if (!adapter->have_msi)
2287                 flags |= IRQF_SHARED;
2288         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2289                         netdev->name, netdev);
2290         if (err) {
2291                 if (netif_msg_ifup(adapter))
2292                         dev_err(&pdev->dev,
2293                                 "Unable to allocate interrupt Error: %d\n",
2294                                 err);
2295                 if (adapter->have_msi)
2296                         pci_disable_msi(adapter->pdev);
2297                 return err;
2298         }
2299         if (netif_msg_ifup(adapter))
2300                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2301         return err;
2302 }
2303
2304
2305 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2306 {
2307         /* release tx-pending skbs and reset tx/rx ring index */
2308         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2309         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2310         atl1c_clean_rx_ring(adapter);
2311 }
2312
2313 static int atl1c_up(struct atl1c_adapter *adapter)
2314 {
2315         struct net_device *netdev = adapter->netdev;
2316         int err;
2317
2318         netif_carrier_off(netdev);
2319
2320         err = atl1c_configure(adapter);
2321         if (unlikely(err))
2322                 goto err_up;
2323
2324         err = atl1c_request_irq(adapter);
2325         if (unlikely(err))
2326                 goto err_up;
2327
2328         atl1c_check_link_status(adapter);
2329         clear_bit(__AT_DOWN, &adapter->flags);
2330         napi_enable(&adapter->napi);
2331         atl1c_irq_enable(adapter);
2332         netif_start_queue(netdev);
2333         return err;
2334
2335 err_up:
2336         atl1c_clean_rx_ring(adapter);
2337         return err;
2338 }
2339
2340 static void atl1c_down(struct atl1c_adapter *adapter)
2341 {
2342         struct net_device *netdev = adapter->netdev;
2343
2344         atl1c_del_timer(adapter);
2345         adapter->work_event = 0; /* clear all event */
2346         /* signal that we're down so the interrupt handler does not
2347          * reschedule our watchdog timer */
2348         set_bit(__AT_DOWN, &adapter->flags);
2349         netif_carrier_off(netdev);
2350         napi_disable(&adapter->napi);
2351         atl1c_irq_disable(adapter);
2352         atl1c_free_irq(adapter);
2353         /* disable ASPM if device inactive */
2354         atl1c_disable_l0s_l1(&adapter->hw);
2355         /* reset MAC to disable all RX/TX */
2356         atl1c_reset_mac(&adapter->hw);
2357         msleep(1);
2358
2359         adapter->link_speed = SPEED_0;
2360         adapter->link_duplex = -1;
2361         atl1c_reset_dma_ring(adapter);
2362 }
2363
2364 /**
2365  * atl1c_open - Called when a network interface is made active
2366  * @netdev: network interface device structure
2367  *
2368  * Returns 0 on success, negative value on failure
2369  *
2370  * The open entry point is called when a network interface is made
2371  * active by the system (IFF_UP).  At this point all resources needed
2372  * for transmit and receive operations are allocated, the interrupt
2373  * handler is registered with the OS, the watchdog timer is started,
2374  * and the stack is notified that the interface is ready.
2375  */
2376 static int atl1c_open(struct net_device *netdev)
2377 {
2378         struct atl1c_adapter *adapter = netdev_priv(netdev);
2379         int err;
2380
2381         /* disallow open during test */
2382         if (test_bit(__AT_TESTING, &adapter->flags))
2383                 return -EBUSY;
2384
2385         /* allocate rx/tx dma buffer & descriptors */
2386         err = atl1c_setup_ring_resources(adapter);
2387         if (unlikely(err))
2388                 return err;
2389
2390         err = atl1c_up(adapter);
2391         if (unlikely(err))
2392                 goto err_up;
2393
2394         return 0;
2395
2396 err_up:
2397         atl1c_free_irq(adapter);
2398         atl1c_free_ring_resources(adapter);
2399         atl1c_reset_mac(&adapter->hw);
2400         return err;
2401 }
2402
2403 /**
2404  * atl1c_close - Disables a network interface
2405  * @netdev: network interface device structure
2406  *
2407  * Returns 0, this is not allowed to fail
2408  *
2409  * The close entry point is called when an interface is de-activated
2410  * by the OS.  The hardware is still under the drivers control, but
2411  * needs to be disabled.  A global MAC reset is issued to stop the
2412  * hardware, and all transmit and receive resources are freed.
2413  */
2414 static int atl1c_close(struct net_device *netdev)
2415 {
2416         struct atl1c_adapter *adapter = netdev_priv(netdev);
2417
2418         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2419         set_bit(__AT_DOWN, &adapter->flags);
2420         cancel_work_sync(&adapter->common_task);
2421         atl1c_down(adapter);
2422         atl1c_free_ring_resources(adapter);
2423         return 0;
2424 }
2425
2426 static int atl1c_suspend(struct device *dev)
2427 {
2428         struct pci_dev *pdev = to_pci_dev(dev);
2429         struct net_device *netdev = pci_get_drvdata(pdev);
2430         struct atl1c_adapter *adapter = netdev_priv(netdev);
2431         struct atl1c_hw *hw = &adapter->hw;
2432         u32 wufc = adapter->wol;
2433
2434         atl1c_disable_l0s_l1(hw);
2435         if (netif_running(netdev)) {
2436                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2437                 atl1c_down(adapter);
2438         }
2439         netif_device_detach(netdev);
2440
2441         if (wufc)
2442                 if (atl1c_phy_to_ps_link(hw) != 0)
2443                         dev_dbg(&pdev->dev, "phy power saving failed");
2444
2445         atl1c_power_saving(hw, wufc);
2446
2447         return 0;
2448 }
2449
2450 #ifdef CONFIG_PM_SLEEP
2451 static int atl1c_resume(struct device *dev)
2452 {
2453         struct pci_dev *pdev = to_pci_dev(dev);
2454         struct net_device *netdev = pci_get_drvdata(pdev);
2455         struct atl1c_adapter *adapter = netdev_priv(netdev);
2456
2457         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2458         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2459
2460         atl1c_phy_reset(&adapter->hw);
2461         atl1c_reset_mac(&adapter->hw);
2462         atl1c_phy_init(&adapter->hw);
2463
2464 #if 0
2465         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2466         pm_data &= ~PM_CTRLSTAT_PME_EN;
2467         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2468 #endif
2469
2470         netif_device_attach(netdev);
2471         if (netif_running(netdev))
2472                 atl1c_up(adapter);
2473
2474         return 0;
2475 }
2476 #endif
2477
2478 static void atl1c_shutdown(struct pci_dev *pdev)
2479 {
2480         struct net_device *netdev = pci_get_drvdata(pdev);
2481         struct atl1c_adapter *adapter = netdev_priv(netdev);
2482
2483         atl1c_suspend(&pdev->dev);
2484         pci_wake_from_d3(pdev, adapter->wol);
2485         pci_set_power_state(pdev, PCI_D3hot);
2486 }
2487
2488 static const struct net_device_ops atl1c_netdev_ops = {
2489         .ndo_open               = atl1c_open,
2490         .ndo_stop               = atl1c_close,
2491         .ndo_validate_addr      = eth_validate_addr,
2492         .ndo_start_xmit         = atl1c_xmit_frame,
2493         .ndo_set_mac_address    = atl1c_set_mac_addr,
2494         .ndo_set_rx_mode        = atl1c_set_multi,
2495         .ndo_change_mtu         = atl1c_change_mtu,
2496         .ndo_fix_features       = atl1c_fix_features,
2497         .ndo_set_features       = atl1c_set_features,
2498         .ndo_do_ioctl           = atl1c_ioctl,
2499         .ndo_tx_timeout         = atl1c_tx_timeout,
2500         .ndo_get_stats          = atl1c_get_stats,
2501 #ifdef CONFIG_NET_POLL_CONTROLLER
2502         .ndo_poll_controller    = atl1c_netpoll,
2503 #endif
2504 };
2505
2506 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2507 {
2508         SET_NETDEV_DEV(netdev, &pdev->dev);
2509         pci_set_drvdata(pdev, netdev);
2510
2511         netdev->netdev_ops = &atl1c_netdev_ops;
2512         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2513         atl1c_set_ethtool_ops(netdev);
2514
2515         /* TODO: add when ready */
2516         netdev->hw_features =   NETIF_F_SG              |
2517                                 NETIF_F_HW_CSUM         |
2518                                 NETIF_F_HW_VLAN_CTAG_RX |
2519                                 NETIF_F_TSO             |
2520                                 NETIF_F_TSO6;
2521         netdev->features =      netdev->hw_features     |
2522                                 NETIF_F_HW_VLAN_CTAG_TX;
2523         return 0;
2524 }
2525
2526 /**
2527  * atl1c_probe - Device Initialization Routine
2528  * @pdev: PCI device information struct
2529  * @ent: entry in atl1c_pci_tbl
2530  *
2531  * Returns 0 on success, negative on failure
2532  *
2533  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2534  * The OS initialization, configuring of the adapter private structure,
2535  * and a hardware reset occur.
2536  */
2537 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2538 {
2539         struct net_device *netdev;
2540         struct atl1c_adapter *adapter;
2541         static int cards_found;
2542
2543         int err = 0;
2544
2545         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2546         err = pci_enable_device_mem(pdev);
2547         if (err) {
2548                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2549                 return err;
2550         }
2551
2552         /*
2553          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2554          * shared register for the high 32 bits, so only a single, aligned,
2555          * 4 GB physical address range can be used at a time.
2556          *
2557          * Supporting 64-bit DMA on this hardware is more trouble than it's
2558          * worth.  It is far easier to limit to 32-bit DMA than update
2559          * various kernel subsystems to support the mechanics required by a
2560          * fixed-high-32-bit system.
2561          */
2562         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2563             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2564                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2565                 goto err_dma;
2566         }
2567
2568         err = pci_request_regions(pdev, atl1c_driver_name);
2569         if (err) {
2570                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2571                 goto err_pci_reg;
2572         }
2573
2574         pci_set_master(pdev);
2575
2576         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2577         if (netdev == NULL) {
2578                 err = -ENOMEM;
2579                 goto err_alloc_etherdev;
2580         }
2581
2582         err = atl1c_init_netdev(netdev, pdev);
2583         if (err) {
2584                 dev_err(&pdev->dev, "init netdevice failed\n");
2585                 goto err_init_netdev;
2586         }
2587         adapter = netdev_priv(netdev);
2588         adapter->bd_number = cards_found;
2589         adapter->netdev = netdev;
2590         adapter->pdev = pdev;
2591         adapter->hw.adapter = adapter;
2592         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2593         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2594         if (!adapter->hw.hw_addr) {
2595                 err = -EIO;
2596                 dev_err(&pdev->dev, "cannot map device registers\n");
2597                 goto err_ioremap;
2598         }
2599
2600         /* init mii data */
2601         adapter->mii.dev = netdev;
2602         adapter->mii.mdio_read  = atl1c_mdio_read;
2603         adapter->mii.mdio_write = atl1c_mdio_write;
2604         adapter->mii.phy_id_mask = 0x1f;
2605         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2606         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2607         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2608                         (unsigned long)adapter);
2609         /* setup the private structure */
2610         err = atl1c_sw_init(adapter);
2611         if (err) {
2612                 dev_err(&pdev->dev, "net device private data init failed\n");
2613                 goto err_sw_init;
2614         }
2615         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2616
2617         /* Init GPHY as early as possible due to power saving issue  */
2618         atl1c_phy_reset(&adapter->hw);
2619
2620         err = atl1c_reset_mac(&adapter->hw);
2621         if (err) {
2622                 err = -EIO;
2623                 goto err_reset;
2624         }
2625
2626         /* reset the controller to
2627          * put the device in a known good starting state */
2628         err = atl1c_phy_init(&adapter->hw);
2629         if (err) {
2630                 err = -EIO;
2631                 goto err_reset;
2632         }
2633         if (atl1c_read_mac_addr(&adapter->hw)) {
2634                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2635                 netdev->addr_assign_type = NET_ADDR_RANDOM;
2636         }
2637         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2638         if (netif_msg_probe(adapter))
2639                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2640                         adapter->hw.mac_addr);
2641
2642         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2643         INIT_WORK(&adapter->common_task, atl1c_common_task);
2644         adapter->work_event = 0;
2645         err = register_netdev(netdev);
2646         if (err) {
2647                 dev_err(&pdev->dev, "register netdevice failed\n");
2648                 goto err_register;
2649         }
2650
2651         if (netif_msg_probe(adapter))
2652                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2653         cards_found++;
2654         return 0;
2655
2656 err_reset:
2657 err_register:
2658 err_sw_init:
2659         iounmap(adapter->hw.hw_addr);
2660 err_init_netdev:
2661 err_ioremap:
2662         free_netdev(netdev);
2663 err_alloc_etherdev:
2664         pci_release_regions(pdev);
2665 err_pci_reg:
2666 err_dma:
2667         pci_disable_device(pdev);
2668         return err;
2669 }
2670
2671 /**
2672  * atl1c_remove - Device Removal Routine
2673  * @pdev: PCI device information struct
2674  *
2675  * atl1c_remove is called by the PCI subsystem to alert the driver
2676  * that it should release a PCI device.  The could be caused by a
2677  * Hot-Plug event, or because the driver is going to be removed from
2678  * memory.
2679  */
2680 static void atl1c_remove(struct pci_dev *pdev)
2681 {
2682         struct net_device *netdev = pci_get_drvdata(pdev);
2683         struct atl1c_adapter *adapter = netdev_priv(netdev);
2684
2685         unregister_netdev(netdev);
2686         /* restore permanent address */
2687         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2688         atl1c_phy_disable(&adapter->hw);
2689
2690         iounmap(adapter->hw.hw_addr);
2691
2692         pci_release_regions(pdev);
2693         pci_disable_device(pdev);
2694         free_netdev(netdev);
2695 }
2696
2697 /**
2698  * atl1c_io_error_detected - called when PCI error is detected
2699  * @pdev: Pointer to PCI device
2700  * @state: The current pci connection state
2701  *
2702  * This function is called after a PCI bus error affecting
2703  * this device has been detected.
2704  */
2705 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2706                                                 pci_channel_state_t state)
2707 {
2708         struct net_device *netdev = pci_get_drvdata(pdev);
2709         struct atl1c_adapter *adapter = netdev_priv(netdev);
2710
2711         netif_device_detach(netdev);
2712
2713         if (state == pci_channel_io_perm_failure)
2714                 return PCI_ERS_RESULT_DISCONNECT;
2715
2716         if (netif_running(netdev))
2717                 atl1c_down(adapter);
2718
2719         pci_disable_device(pdev);
2720
2721         /* Request a slot slot reset. */
2722         return PCI_ERS_RESULT_NEED_RESET;
2723 }
2724
2725 /**
2726  * atl1c_io_slot_reset - called after the pci bus has been reset.
2727  * @pdev: Pointer to PCI device
2728  *
2729  * Restart the card from scratch, as if from a cold-boot. Implementation
2730  * resembles the first-half of the e1000_resume routine.
2731  */
2732 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2733 {
2734         struct net_device *netdev = pci_get_drvdata(pdev);
2735         struct atl1c_adapter *adapter = netdev_priv(netdev);
2736
2737         if (pci_enable_device(pdev)) {
2738                 if (netif_msg_hw(adapter))
2739                         dev_err(&pdev->dev,
2740                                 "Cannot re-enable PCI device after reset\n");
2741                 return PCI_ERS_RESULT_DISCONNECT;
2742         }
2743         pci_set_master(pdev);
2744
2745         pci_enable_wake(pdev, PCI_D3hot, 0);
2746         pci_enable_wake(pdev, PCI_D3cold, 0);
2747
2748         atl1c_reset_mac(&adapter->hw);
2749
2750         return PCI_ERS_RESULT_RECOVERED;
2751 }
2752
2753 /**
2754  * atl1c_io_resume - called when traffic can start flowing again.
2755  * @pdev: Pointer to PCI device
2756  *
2757  * This callback is called when the error recovery driver tells us that
2758  * its OK to resume normal operation. Implementation resembles the
2759  * second-half of the atl1c_resume routine.
2760  */
2761 static void atl1c_io_resume(struct pci_dev *pdev)
2762 {
2763         struct net_device *netdev = pci_get_drvdata(pdev);
2764         struct atl1c_adapter *adapter = netdev_priv(netdev);
2765
2766         if (netif_running(netdev)) {
2767                 if (atl1c_up(adapter)) {
2768                         if (netif_msg_hw(adapter))
2769                                 dev_err(&pdev->dev,
2770                                         "Cannot bring device back up after reset\n");
2771                         return;
2772                 }
2773         }
2774
2775         netif_device_attach(netdev);
2776 }
2777
2778 static const struct pci_error_handlers atl1c_err_handler = {
2779         .error_detected = atl1c_io_error_detected,
2780         .slot_reset = atl1c_io_slot_reset,
2781         .resume = atl1c_io_resume,
2782 };
2783
2784 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2785
2786 static struct pci_driver atl1c_driver = {
2787         .name     = atl1c_driver_name,
2788         .id_table = atl1c_pci_tbl,
2789         .probe    = atl1c_probe,
2790         .remove   = atl1c_remove,
2791         .shutdown = atl1c_shutdown,
2792         .err_handler = &atl1c_err_handler,
2793         .driver.pm = &atl1c_pm_ops,
2794 };
2795
2796 module_pci_driver(atl1c_driver);