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

   1 /*
   2  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1c.h"
  23
  24 #define ATL1C_DRV_VERSION "1.0.1.0-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27 #define PCI_DEVICE_ID_ATTANSIC_L2C      0x1062
  28 #define PCI_DEVICE_ID_ATTANSIC_L1C      0x1063
  29 #define PCI_DEVICE_ID_ATHEROS_L2C_B     0x2060 /* AR8152 v1.1 Fast 10/100 */
  30 #define PCI_DEVICE_ID_ATHEROS_L2C_B2    0x2062 /* AR8152 v2.0 Fast 10/100 */
  31 #define PCI_DEVICE_ID_ATHEROS_L1D       0x1073 /* AR8151 v1.0 Gigabit 1000 */
  32 #define PCI_DEVICE_ID_ATHEROS_L1D_2_0   0x1083 /* AR8151 v2.0 Gigabit 1000 */
  33 #define L2CB_V10                        0xc0
  34 #define L2CB_V11                        0xc1
  35
  36 /*
  37  * atl1c_pci_tbl - PCI Device ID Table
  38  *
  39  * Wildcard entries (PCI_ANY_ID) should come last
  40  * Last entry must be all 0s
  41  *
  42  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  43  *   Class, Class Mask, private data (not used) }
  44  */
  45 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = {
  46         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  47         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  48         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  49         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  50         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  51         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  52         /* required last entry */
  53         { 0 }
  54 };
  55 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  56
  57 MODULE_AUTHOR("Jie Yang");
  58 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
  59 MODULE_DESCRIPTION("Qualcom Atheros 100/1000M Ethernet Network Driver");
  60 MODULE_LICENSE("GPL");
  61 MODULE_VERSION(ATL1C_DRV_VERSION);
  62
  63 static int atl1c_stop_mac(struct atl1c_hw *hw);
  64 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
  65 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
  66 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  67 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
  68 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
  69 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
  70                    int *work_done, int work_to_do);
  71 static int atl1c_up(struct atl1c_adapter *adapter);
  72 static void atl1c_down(struct atl1c_adapter *adapter);
  73
  74 static const u16 atl1c_pay_load_size[] = {
  75         128, 256, 512, 1024, 2048, 4096,
  76 };
  77
  78
  79 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  80         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  81 static void atl1c_pcie_patch(struct atl1c_hw *hw)
  82 {
  83         u32 data;
  84
  85         AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
  86         data |= PCIE_PHYMISC_FORCE_RCV_DET;
  87         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
  88
  89         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
  90                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
  91
  92                 data &= ~(PCIE_PHYMISC2_SERDES_CDR_MASK <<
  93                         PCIE_PHYMISC2_SERDES_CDR_SHIFT);
  94                 data |= 3 << PCIE_PHYMISC2_SERDES_CDR_SHIFT;
  95                 data &= ~(PCIE_PHYMISC2_SERDES_TH_MASK <<
  96                         PCIE_PHYMISC2_SERDES_TH_SHIFT);
  97                 data |= 3 << PCIE_PHYMISC2_SERDES_TH_SHIFT;
  98                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
  99         }
 100 }
 101
 102 /* FIXME: no need any more ? */
 103 /*
 104  * atl1c_init_pcie - init PCIE module
 105  */
 106 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 107 {
 108         u32 data;
 109         u32 pci_cmd;
 110         struct pci_dev *pdev = hw->adapter->pdev;
 111         int pos;
 112
 113         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 114         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 115         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 116                 PCI_COMMAND_IO);
 117         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 118
 119         /*
 120          * Clear any PowerSaveing Settings
 121          */
 122         pci_enable_wake(pdev, PCI_D3hot, 0);
 123         pci_enable_wake(pdev, PCI_D3cold, 0);
 124
 125         /*
 126          * Mask some pcie error bits
 127          */
 128         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 129         pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
 130         data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
 131         pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
 132         /* clear error status */
 133         pci_write_config_word(pdev, pci_pcie_cap(pdev) + PCI_EXP_DEVSTA,
 134                         PCI_EXP_DEVSTA_NFED |
 135                         PCI_EXP_DEVSTA_FED |
 136                         PCI_EXP_DEVSTA_CED |
 137                         PCI_EXP_DEVSTA_URD);
 138
 139         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 140         data &= ~LTSSM_ID_EN_WRO;
 141         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 142
 143         atl1c_pcie_patch(hw);
 144         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 145                 atl1c_disable_l0s_l1(hw);
 146         if (flag & ATL1C_PCIE_PHY_RESET)
 147                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 148         else
 149                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 150                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 151
 152         msleep(5);
 153 }
 154
 155 /*
 156  * atl1c_irq_enable - Enable default interrupt generation settings
 157  * @adapter: board private structure
 158  */
 159 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 160 {
 161         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 162                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 163                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 164                 AT_WRITE_FLUSH(&adapter->hw);
 165         }
 166 }
 167
 168 /*
 169  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 170  * @adapter: board private structure
 171  */
 172 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 173 {
 174         atomic_inc(&adapter->irq_sem);
 175         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 176         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 177         AT_WRITE_FLUSH(&adapter->hw);
 178         synchronize_irq(adapter->pdev->irq);
 179 }
 180
 181 /*
 182  * atl1c_irq_reset - reset interrupt confiure on the NIC
 183  * @adapter: board private structure
 184  */
 185 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 186 {
 187         atomic_set(&adapter->irq_sem, 1);
 188         atl1c_irq_enable(adapter);
 189 }
 190
 191 /*
 192  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 193  * of the idle status register until the device is actually idle
 194  */
 195 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
 196 {
 197         int timeout;
 198         u32 data;
 199
 200         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 201                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 202                 if ((data & modu_ctrl) == 0)
 203                         return 0;
 204                 msleep(1);
 205         }
 206         return data;
 207 }
 208
 209 /*
 210  * atl1c_phy_config - Timer Call-back
 211  * @data: pointer to netdev cast into an unsigned long
 212  */
 213 static void atl1c_phy_config(unsigned long data)
 214 {
 215         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 216         struct atl1c_hw *hw = &adapter->hw;
 217         unsigned long flags;
 218
 219         spin_lock_irqsave(&adapter->mdio_lock, flags);
 220         atl1c_restart_autoneg(hw);
 221         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 222 }
 223
 224 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 225 {
 226         WARN_ON(in_interrupt());
 227         atl1c_down(adapter);
 228         atl1c_up(adapter);
 229         clear_bit(__AT_RESETTING, &adapter->flags);
 230 }
 231
 232 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 233 {
 234         struct atl1c_hw *hw = &adapter->hw;
 235         struct net_device *netdev = adapter->netdev;
 236         struct pci_dev    *pdev   = adapter->pdev;
 237         int err;
 238         unsigned long flags;
 239         u16 speed, duplex, phy_data;
 240
 241         spin_lock_irqsave(&adapter->mdio_lock, flags);
 242         /* MII_BMSR must read twise */
 243         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 244         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 245         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 246
 247         if ((phy_data & BMSR_LSTATUS) == 0) {
 248                 /* link down */
 249                 hw->hibernate = true;
 250                 if (atl1c_stop_mac(hw) != 0)
 251                         if (netif_msg_hw(adapter))
 252                                 dev_warn(&pdev->dev, "stop mac failed\n");
 253                 atl1c_set_aspm(hw, false);
 254                 netif_carrier_off(netdev);
 255                 netif_stop_queue(netdev);
 256                 atl1c_phy_reset(hw);
 257                 atl1c_phy_init(&adapter->hw);
 258         } else {
 259                 /* Link Up */
 260                 hw->hibernate = false;
 261                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 262                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 263                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 264                 if (unlikely(err))
 265                         return;
 266                 /* link result is our setting */
 267                 if (adapter->link_speed != speed ||
 268                     adapter->link_duplex != duplex) {
 269                         adapter->link_speed  = speed;
 270                         adapter->link_duplex = duplex;
 271                         atl1c_set_aspm(hw, true);
 272                         atl1c_enable_tx_ctrl(hw);
 273                         atl1c_enable_rx_ctrl(hw);
 274                         atl1c_setup_mac_ctrl(adapter);
 275                         if (netif_msg_link(adapter))
 276                                 dev_info(&pdev->dev,
 277                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 278                                         atl1c_driver_name, netdev->name,
 279                                         adapter->link_speed,
 280                                         adapter->link_duplex == FULL_DUPLEX ?
 281                                         "Full Duplex" : "Half Duplex");
 282                 }
 283                 if (!netif_carrier_ok(netdev))
 284                         netif_carrier_on(netdev);
 285         }
 286 }
 287
 288 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 289 {
 290         struct net_device *netdev = adapter->netdev;
 291         struct pci_dev    *pdev   = adapter->pdev;
 292         u16 phy_data;
 293         u16 link_up;
 294
 295         spin_lock(&adapter->mdio_lock);
 296         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 297         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 298         spin_unlock(&adapter->mdio_lock);
 299         link_up = phy_data & BMSR_LSTATUS;
 300         /* notify upper layer link down ASAP */
 301         if (!link_up) {
 302                 if (netif_carrier_ok(netdev)) {
 303                         /* old link state: Up */
 304                         netif_carrier_off(netdev);
 305                         if (netif_msg_link(adapter))
 306                                 dev_info(&pdev->dev,
 307                                         "%s: %s NIC Link is Down\n",
 308                                         atl1c_driver_name, netdev->name);
 309                         adapter->link_speed = SPEED_0;
 310                 }
 311         }
 312
 313         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 314         schedule_work(&adapter->common_task);
 315 }
 316
 317 static void atl1c_common_task(struct work_struct *work)
 318 {
 319         struct atl1c_adapter *adapter;
 320         struct net_device *netdev;
 321
 322         adapter = container_of(work, struct atl1c_adapter, common_task);
 323         netdev = adapter->netdev;
 324
 325         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 326                 netif_device_detach(netdev);
 327                 atl1c_down(adapter);
 328                 atl1c_up(adapter);
 329                 netif_device_attach(netdev);
 330         }
 331
 332         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 333                 &adapter->work_event))
 334                 atl1c_check_link_status(adapter);
 335 }
 336
 337
 338 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 339 {
 340         del_timer_sync(&adapter->phy_config_timer);
 341 }
 342
 343
 344 /*
 345  * atl1c_tx_timeout - Respond to a Tx Hang
 346  * @netdev: network interface device structure
 347  */
 348 static void atl1c_tx_timeout(struct net_device *netdev)
 349 {
 350         struct atl1c_adapter *adapter = netdev_priv(netdev);
 351
 352         /* Do the reset outside of interrupt context */
 353         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 354         schedule_work(&adapter->common_task);
 355 }
 356
 357 /*
 358  * atl1c_set_multi - Multicast and Promiscuous mode set
 359  * @netdev: network interface device structure
 360  *
 361  * The set_multi entry point is called whenever the multicast address
 362  * list or the network interface flags are updated.  This routine is
 363  * responsible for configuring the hardware for proper multicast,
 364  * promiscuous mode, and all-multi behavior.
 365  */
 366 static void atl1c_set_multi(struct net_device *netdev)
 367 {
 368         struct atl1c_adapter *adapter = netdev_priv(netdev);
 369         struct atl1c_hw *hw = &adapter->hw;
 370         struct netdev_hw_addr *ha;
 371         u32 mac_ctrl_data;
 372         u32 hash_value;
 373
 374         /* Check for Promiscuous and All Multicast modes */
 375         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 376
 377         if (netdev->flags & IFF_PROMISC) {
 378                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 379         } else if (netdev->flags & IFF_ALLMULTI) {
 380                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 381                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 382         } else {
 383                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 384         }
 385
 386         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 387
 388         /* clear the old settings from the multicast hash table */
 389         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 390         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 391
 392         /* comoute mc addresses' hash value ,and put it into hash table */
 393         netdev_for_each_mc_addr(ha, netdev) {
 394                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 395                 atl1c_hash_set(hw, hash_value);
 396         }
 397 }
 398
 399 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 400 {
 401         if (features & NETIF_F_HW_VLAN_RX) {
 402                 /* enable VLAN tag insert/strip */
 403                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 404         } else {
 405                 /* disable VLAN tag insert/strip */
 406                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 407         }
 408 }
 409
 410 static void atl1c_vlan_mode(struct net_device *netdev,
 411         netdev_features_t features)
 412 {
 413         struct atl1c_adapter *adapter = netdev_priv(netdev);
 414         struct pci_dev *pdev = adapter->pdev;
 415         u32 mac_ctrl_data = 0;
 416
 417         if (netif_msg_pktdata(adapter))
 418                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 419
 420         atl1c_irq_disable(adapter);
 421         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 422         __atl1c_vlan_mode(features, &mac_ctrl_data);
 423         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 424         atl1c_irq_enable(adapter);
 425 }
 426
 427 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 428 {
 429         struct pci_dev *pdev = adapter->pdev;
 430
 431         if (netif_msg_pktdata(adapter))
 432                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 433         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 434 }
 435
 436 /*
 437  * atl1c_set_mac - Change the Ethernet Address of the NIC
 438  * @netdev: network interface device structure
 439  * @p: pointer to an address structure
 440  *
 441  * Returns 0 on success, negative on failure
 442  */
 443 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 444 {
 445         struct atl1c_adapter *adapter = netdev_priv(netdev);
 446         struct sockaddr *addr = p;
 447
 448         if (!is_valid_ether_addr(addr->sa_data))
 449                 return -EADDRNOTAVAIL;
 450
 451         if (netif_running(netdev))
 452                 return -EBUSY;
 453
 454         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 455         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 456         netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
 457
 458         atl1c_hw_set_mac_addr(&adapter->hw);
 459
 460         return 0;
 461 }
 462
 463 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 464                                 struct net_device *dev)
 465 {
 466         int mtu = dev->mtu;
 467
 468         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 469                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 470 }
 471
 472 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 473         netdev_features_t features)
 474 {
 475         /*
 476          * Since there is no support for separate rx/tx vlan accel
 477          * enable/disable make sure tx flag is always in same state as rx.
 478          */
 479         if (features & NETIF_F_HW_VLAN_RX)
 480                 features |= NETIF_F_HW_VLAN_TX;
 481         else
 482                 features &= ~NETIF_F_HW_VLAN_TX;
 483
 484         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 485                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 486
 487         return features;
 488 }
 489
 490 static int atl1c_set_features(struct net_device *netdev,
 491         netdev_features_t features)
 492 {
 493         netdev_features_t changed = netdev->features ^ features;
 494
 495         if (changed & NETIF_F_HW_VLAN_RX)
 496                 atl1c_vlan_mode(netdev, features);
 497
 498         return 0;
 499 }
 500
 501 /*
 502  * atl1c_change_mtu - Change the Maximum Transfer Unit
 503  * @netdev: network interface device structure
 504  * @new_mtu: new value for maximum frame size
 505  *
 506  * Returns 0 on success, negative on failure
 507  */
 508 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 509 {
 510         struct atl1c_adapter *adapter = netdev_priv(netdev);
 511         struct atl1c_hw *hw = &adapter->hw;
 512         int old_mtu   = netdev->mtu;
 513         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 514
 515         /* Fast Ethernet controller doesn't support jumbo packet */
 516         if (((hw->nic_type == athr_l2c ||
 517               hw->nic_type == athr_l2c_b ||
 518               hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
 519               max_frame < ETH_ZLEN + ETH_FCS_LEN ||
 520               max_frame > MAX_JUMBO_FRAME_SIZE) {
 521                 if (netif_msg_link(adapter))
 522                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 523                 return -EINVAL;
 524         }
 525         /* set MTU */
 526         if (old_mtu != new_mtu && netif_running(netdev)) {
 527                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 528                         msleep(1);
 529                 netdev->mtu = new_mtu;
 530                 adapter->hw.max_frame_size = new_mtu;
 531                 atl1c_set_rxbufsize(adapter, netdev);
 532                 atl1c_down(adapter);
 533                 netdev_update_features(netdev);
 534                 atl1c_up(adapter);
 535                 clear_bit(__AT_RESETTING, &adapter->flags);
 536                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 537                         u32 phy_data;
 538
 539                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 540                         phy_data |= 0x10000000;
 541                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 542                 }
 543
 544         }
 545         return 0;
 546 }
 547
 548 /*
 549  *  caller should hold mdio_lock
 550  */
 551 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 552 {
 553         struct atl1c_adapter *adapter = netdev_priv(netdev);
 554         u16 result;
 555
 556         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 557         return result;
 558 }
 559
 560 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 561                              int reg_num, int val)
 562 {
 563         struct atl1c_adapter *adapter = netdev_priv(netdev);
 564
 565         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 566 }
 567
 568 /*
 569  * atl1c_mii_ioctl -
 570  * @netdev:
 571  * @ifreq:
 572  * @cmd:
 573  */
 574 static int atl1c_mii_ioctl(struct net_device *netdev,
 575                            struct ifreq *ifr, int cmd)
 576 {
 577         struct atl1c_adapter *adapter = netdev_priv(netdev);
 578         struct pci_dev *pdev = adapter->pdev;
 579         struct mii_ioctl_data *data = if_mii(ifr);
 580         unsigned long flags;
 581         int retval = 0;
 582
 583         if (!netif_running(netdev))
 584                 return -EINVAL;
 585
 586         spin_lock_irqsave(&adapter->mdio_lock, flags);
 587         switch (cmd) {
 588         case SIOCGMIIPHY:
 589                 data->phy_id = 0;
 590                 break;
 591
 592         case SIOCGMIIREG:
 593                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 594                                     &data->val_out)) {
 595                         retval = -EIO;
 596                         goto out;
 597                 }
 598                 break;
 599
 600         case SIOCSMIIREG:
 601                 if (data->reg_num & ~(0x1F)) {
 602                         retval = -EFAULT;
 603                         goto out;
 604                 }
 605
 606                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 607                                 data->reg_num, data->val_in);
 608                 if (atl1c_write_phy_reg(&adapter->hw,
 609                                      data->reg_num, data->val_in)) {
 610                         retval = -EIO;
 611                         goto out;
 612                 }
 613                 break;
 614
 615         default:
 616                 retval = -EOPNOTSUPP;
 617                 break;
 618         }
 619 out:
 620         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 621         return retval;
 622 }
 623
 624 /*
 625  * atl1c_ioctl -
 626  * @netdev:
 627  * @ifreq:
 628  * @cmd:
 629  */
 630 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 631 {
 632         switch (cmd) {
 633         case SIOCGMIIPHY:
 634         case SIOCGMIIREG:
 635         case SIOCSMIIREG:
 636                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 637         default:
 638                 return -EOPNOTSUPP;
 639         }
 640 }
 641
 642 /*
 643  * atl1c_alloc_queues - Allocate memory for all rings
 644  * @adapter: board private structure to initialize
 645  *
 646  */
 647 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 648 {
 649         return 0;
 650 }
 651
 652 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 653 {
 654         switch (hw->device_id) {
 655         case PCI_DEVICE_ID_ATTANSIC_L2C:
 656                 hw->nic_type = athr_l2c;
 657                 break;
 658         case PCI_DEVICE_ID_ATTANSIC_L1C:
 659                 hw->nic_type = athr_l1c;
 660                 break;
 661         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 662                 hw->nic_type = athr_l2c_b;
 663                 break;
 664         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 665                 hw->nic_type = athr_l2c_b2;
 666                 break;
 667         case PCI_DEVICE_ID_ATHEROS_L1D:
 668                 hw->nic_type = athr_l1d;
 669                 break;
 670         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 671                 hw->nic_type = athr_l1d_2;
 672                 break;
 673         default:
 674                 break;
 675         }
 676 }
 677
 678 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 679 {
 680         u32 phy_status_data;
 681         u32 link_ctrl_data;
 682
 683         atl1c_set_mac_type(hw);
 684         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 685         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 686
 687         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 688                          ATL1C_TXQ_MODE_ENHANCE;
 689         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 690                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 691         if (link_ctrl_data & LINK_CTRL_L1_EN)
 692                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 693         if (link_ctrl_data & LINK_CTRL_EXT_SYNC)
 694                 hw->ctrl_flags |= ATL1C_LINK_EXT_SYNC;
 695         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 696
 697         if (hw->nic_type == athr_l1c ||
 698             hw->nic_type == athr_l1d ||
 699             hw->nic_type == athr_l1d_2)
 700                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 701         return 0;
 702 }
 703 /*
 704  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 705  * @adapter: board private structure to initialize
 706  *
 707  * atl1c_sw_init initializes the Adapter private data structure.
 708  * Fields are initialized based on PCI device information and
 709  * OS network device settings (MTU size).
 710  */
 711 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 712 {
 713         struct atl1c_hw *hw   = &adapter->hw;
 714         struct pci_dev  *pdev = adapter->pdev;
 715         u32 revision;
 716
 717
 718         adapter->wol = 0;
 719         device_set_wakeup_enable(&pdev->dev, false);
 720         adapter->link_speed = SPEED_0;
 721         adapter->link_duplex = FULL_DUPLEX;
 722         adapter->tpd_ring[0].count = 1024;
 723         adapter->rfd_ring.count = 512;
 724
 725         hw->vendor_id = pdev->vendor;
 726         hw->device_id = pdev->device;
 727         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 728         hw->subsystem_id = pdev->subsystem_device;
 729         AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
 730         hw->revision_id = revision & 0xFF;
 731         /* before link up, we assume hibernate is true */
 732         hw->hibernate = true;
 733         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 734         if (atl1c_setup_mac_funcs(hw) != 0) {
 735                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 736                 return -1;
 737         }
 738         hw->intr_mask = IMR_NORMAL_MASK;
 739         hw->phy_configured = false;
 740         hw->preamble_len = 7;
 741         hw->max_frame_size = adapter->netdev->mtu;
 742         hw->autoneg_advertised = ADVERTISED_Autoneg;
 743         hw->indirect_tab = 0xE4E4E4E4;
 744         hw->base_cpu = 0;
 745
 746         hw->ict = 50000;                /* 100ms */
 747         hw->smb_timer = 200000;         /* 400ms */
 748         hw->rx_imt = 200;
 749         hw->tx_imt = 1000;
 750
 751         hw->tpd_burst = 5;
 752         hw->rfd_burst = 8;
 753         hw->dma_order = atl1c_dma_ord_out;
 754         hw->dmar_block = atl1c_dma_req_1024;
 755
 756         if (atl1c_alloc_queues(adapter)) {
 757                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 758                 return -ENOMEM;
 759         }
 760         /* TODO */
 761         atl1c_set_rxbufsize(adapter, adapter->netdev);
 762         atomic_set(&adapter->irq_sem, 1);
 763         spin_lock_init(&adapter->mdio_lock);
 764         spin_lock_init(&adapter->tx_lock);
 765         set_bit(__AT_DOWN, &adapter->flags);
 766
 767         return 0;
 768 }
 769
 770 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 771                                 struct atl1c_buffer *buffer_info, int in_irq)
 772 {
 773         u16 pci_driection;
 774         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 775                 return;
 776         if (buffer_info->dma) {
 777                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 778                         pci_driection = PCI_DMA_FROMDEVICE;
 779                 else
 780                         pci_driection = PCI_DMA_TODEVICE;
 781
 782                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 783                         pci_unmap_single(pdev, buffer_info->dma,
 784                                         buffer_info->length, pci_driection);
 785                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 786                         pci_unmap_page(pdev, buffer_info->dma,
 787                                         buffer_info->length, pci_driection);
 788         }
 789         if (buffer_info->skb) {
 790                 if (in_irq)
 791                         dev_kfree_skb_irq(buffer_info->skb);
 792                 else
 793                         dev_kfree_skb(buffer_info->skb);
 794         }
 795         buffer_info->dma = 0;
 796         buffer_info->skb = NULL;
 797         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 798 }
 799 /*
 800  * atl1c_clean_tx_ring - Free Tx-skb
 801  * @adapter: board private structure
 802  */
 803 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 804                                 enum atl1c_trans_queue type)
 805 {
 806         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 807         struct atl1c_buffer *buffer_info;
 808         struct pci_dev *pdev = adapter->pdev;
 809         u16 index, ring_count;
 810
 811         ring_count = tpd_ring->count;
 812         for (index = 0; index < ring_count; index++) {
 813                 buffer_info = &tpd_ring->buffer_info[index];
 814                 atl1c_clean_buffer(pdev, buffer_info, 0);
 815         }
 816
 817         /* Zero out Tx-buffers */
 818         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 819                 ring_count);
 820         atomic_set(&tpd_ring->next_to_clean, 0);
 821         tpd_ring->next_to_use = 0;
 822 }
 823
 824 /*
 825  * atl1c_clean_rx_ring - Free rx-reservation skbs
 826  * @adapter: board private structure
 827  */
 828 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 829 {
 830         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 831         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 832         struct atl1c_buffer *buffer_info;
 833         struct pci_dev *pdev = adapter->pdev;
 834         int j;
 835
 836         for (j = 0; j < rfd_ring->count; j++) {
 837                 buffer_info = &rfd_ring->buffer_info[j];
 838                 atl1c_clean_buffer(pdev, buffer_info, 0);
 839         }
 840         /* zero out the descriptor ring */
 841         memset(rfd_ring->desc, 0, rfd_ring->size);
 842         rfd_ring->next_to_clean = 0;
 843         rfd_ring->next_to_use = 0;
 844         rrd_ring->next_to_use = 0;
 845         rrd_ring->next_to_clean = 0;
 846 }
 847
 848 /*
 849  * Read / Write Ptr Initialize:
 850  */
 851 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 852 {
 853         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 854         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 855         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 856         struct atl1c_buffer *buffer_info;
 857         int i, j;
 858
 859         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 860                 tpd_ring[i].next_to_use = 0;
 861                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 862                 buffer_info = tpd_ring[i].buffer_info;
 863                 for (j = 0; j < tpd_ring->count; j++)
 864                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 865                                         ATL1C_BUFFER_FREE);
 866         }
 867         rfd_ring->next_to_use = 0;
 868         rfd_ring->next_to_clean = 0;
 869         rrd_ring->next_to_use = 0;
 870         rrd_ring->next_to_clean = 0;
 871         for (j = 0; j < rfd_ring->count; j++) {
 872                 buffer_info = &rfd_ring->buffer_info[j];
 873                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 874         }
 875 }
 876
 877 /*
 878  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 879  * @adapter: board private structure
 880  *
 881  * Free all transmit software resources
 882  */
 883 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 884 {
 885         struct pci_dev *pdev = adapter->pdev;
 886
 887         pci_free_consistent(pdev, adapter->ring_header.size,
 888                                         adapter->ring_header.desc,
 889                                         adapter->ring_header.dma);
 890         adapter->ring_header.desc = NULL;
 891
 892         /* Note: just free tdp_ring.buffer_info,
 893         *  it contain rfd_ring.buffer_info, do not double free */
 894         if (adapter->tpd_ring[0].buffer_info) {
 895                 kfree(adapter->tpd_ring[0].buffer_info);
 896                 adapter->tpd_ring[0].buffer_info = NULL;
 897         }
 898 }
 899
 900 /*
 901  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 902  * @adapter: board private structure
 903  *
 904  * Return 0 on success, negative on failure
 905  */
 906 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 907 {
 908         struct pci_dev *pdev = adapter->pdev;
 909         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 910         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 911         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 912         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 913         int size;
 914         int i;
 915         int count = 0;
 916         int rx_desc_count = 0;
 917         u32 offset = 0;
 918
 919         rrd_ring->count = rfd_ring->count;
 920         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 921                 tpd_ring[i].count = tpd_ring[0].count;
 922
 923         /* 2 tpd queue, one high priority queue,
 924          * another normal priority queue */
 925         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 926                 rfd_ring->count);
 927         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 928         if (unlikely(!tpd_ring->buffer_info)) {
 929                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 930                         size);
 931                 goto err_nomem;
 932         }
 933         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 934                 tpd_ring[i].buffer_info =
 935                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 936                 count += tpd_ring[i].count;
 937         }
 938
 939         rfd_ring->buffer_info =
 940                 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 941         count += rfd_ring->count;
 942         rx_desc_count += rfd_ring->count;
 943
 944         /*
 945          * real ring DMA buffer
 946          * each ring/block may need up to 8 bytes for alignment, hence the
 947          * additional bytes tacked onto the end.
 948          */
 949         ring_header->size = size =
 950                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 951                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 952                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 953                 8 * 4;
 954
 955         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 956                                 &ring_header->dma);
 957         if (unlikely(!ring_header->desc)) {
 958                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 959                 goto err_nomem;
 960         }
 961         memset(ring_header->desc, 0, ring_header->size);
 962         /* init TPD ring */
 963
 964         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 965         offset = tpd_ring[0].dma - ring_header->dma;
 966         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 967                 tpd_ring[i].dma = ring_header->dma + offset;
 968                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 969                 tpd_ring[i].size =
 970                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 971                 offset += roundup(tpd_ring[i].size, 8);
 972         }
 973         /* init RFD ring */
 974         rfd_ring->dma = ring_header->dma + offset;
 975         rfd_ring->desc = (u8 *) ring_header->desc + offset;
 976         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
 977         offset += roundup(rfd_ring->size, 8);
 978
 979         /* init RRD ring */
 980         rrd_ring->dma = ring_header->dma + offset;
 981         rrd_ring->desc = (u8 *) ring_header->desc + offset;
 982         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
 983                 rrd_ring->count;
 984         offset += roundup(rrd_ring->size, 8);
 985
 986         return 0;
 987
 988 err_nomem:
 989         kfree(tpd_ring->buffer_info);
 990         return -ENOMEM;
 991 }
 992
 993 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
 994 {
 995         struct atl1c_hw *hw = &adapter->hw;
 996         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 997         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 998         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
 999                                 adapter->tpd_ring;
1000         u32 data;
1001
1002         /* TPD */
1003         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1004                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1005                                 AT_DMA_HI_ADDR_MASK) >> 32));
1006         /* just enable normal priority TX queue */
1007         AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1008                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1009                                 AT_DMA_LO_ADDR_MASK));
1010         AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1011                         (u32)(tpd_ring[atl1c_trans_high].dma &
1012                                 AT_DMA_LO_ADDR_MASK));
1013         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1014                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1015
1016
1017         /* RFD */
1018         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1019                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1020         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1021                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1022
1023         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1024                         rfd_ring->count & RFD_RING_SIZE_MASK);
1025         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1026                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1027
1028         /* RRD */
1029         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1030                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1031         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1032                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1033
1034         if (hw->nic_type == athr_l2c_b) {
1035                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1036                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1037                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1038                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1039                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1040                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1041                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1042                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1043         }
1044         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d_2) {
1045                         /* Power Saving for L2c_B */
1046                 AT_READ_REG(hw, REG_SERDES_LOCK, &data);
1047                 data |= SERDES_MAC_CLK_SLOWDOWN;
1048                 data |= SERDES_PYH_CLK_SLOWDOWN;
1049                 AT_WRITE_REG(hw, REG_SERDES_LOCK, data);
1050         }
1051         /* Load all of base address above */
1052         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1053 }
1054
1055 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1056 {
1057         struct atl1c_hw *hw = &adapter->hw;
1058         int max_pay_load;
1059         u16 tx_offload_thresh;
1060         u32 txq_ctrl_data;
1061
1062         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1063         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1064                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1065         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1066         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1067         /*
1068          * if BIOS had changed the dam-read-max-length to an invalid value,
1069          * restore it to default value
1070          */
1071         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1072                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1073                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1074         }
1075         txq_ctrl_data =
1076                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1077                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1078
1079         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1080 }
1081
1082 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1083 {
1084         struct atl1c_hw *hw = &adapter->hw;
1085         u32 rxq_ctrl_data;
1086
1087         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1088                         RXQ_RFD_BURST_NUM_SHIFT;
1089
1090         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1091                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1092
1093         /* aspm for gigabit */
1094         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1095                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1096                         ASPM_THRUPUT_LIMIT_100M);
1097
1098         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1099 }
1100
1101 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1102 {
1103         struct atl1c_hw *hw = &adapter->hw;
1104         u32 dma_ctrl_data;
1105
1106         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1107                 DMA_CTRL_RREQ_PRI_DATA |
1108                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1109                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1110                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1111
1112         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1113 }
1114
1115 /*
1116  * Stop the mac, transmit and receive units
1117  * hw - Struct containing variables accessed by shared code
1118  * return : 0  or  idle status (if error)
1119  */
1120 static int atl1c_stop_mac(struct atl1c_hw *hw)
1121 {
1122         u32 data;
1123
1124         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1125         data &= ~RXQ_CTRL_EN;
1126         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1127
1128         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1129         data &= ~TXQ_CTRL_EN;
1130         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1131
1132         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1133
1134         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1135         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1136         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1137
1138         return (int)atl1c_wait_until_idle(hw,
1139                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1140 }
1141
1142 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1143 {
1144         u32 data;
1145
1146         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1147         data |= RXQ_CTRL_EN;
1148         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1149 }
1150
1151 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1152 {
1153         u32 data;
1154
1155         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1156         data |= TXQ_CTRL_EN;
1157         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1158 }
1159
1160 /*
1161  * Reset the transmit and receive units; mask and clear all interrupts.
1162  * hw - Struct containing variables accessed by shared code
1163  * return : 0  or  idle status (if error)
1164  */
1165 static int atl1c_reset_mac(struct atl1c_hw *hw)
1166 {
1167         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1168         struct pci_dev *pdev = adapter->pdev;
1169         u32 master_ctrl_data = 0;
1170
1171         AT_WRITE_REG(hw, REG_IMR, 0);
1172         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1173
1174         atl1c_stop_mac(hw);
1175         /*
1176          * Issue Soft Reset to the MAC.  This will reset the chip's
1177          * transmit, receive, DMA.  It will not effect
1178          * the current PCI configuration.  The global reset bit is self-
1179          * clearing, and should clear within a microsecond.
1180          */
1181         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1182         master_ctrl_data |= MASTER_CTRL_OOB_DIS_OFF;
1183         AT_WRITE_REGW(hw, REG_MASTER_CTRL, ((master_ctrl_data | MASTER_CTRL_SOFT_RST)
1184                         & 0xFFFF));
1185
1186         AT_WRITE_FLUSH(hw);
1187         msleep(10);
1188         /* Wait at least 10ms for All module to be Idle */
1189
1190         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1191                 dev_err(&pdev->dev,
1192                         "MAC state machine can't be idle since"
1193                         " disabled for 10ms second\n");
1194                 return -1;
1195         }
1196         return 0;
1197 }
1198
1199 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1200 {
1201         u32 pm_ctrl_data;
1202
1203         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1204         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1205                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1206         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1207         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1208         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1209         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1210         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1211
1212         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1213         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1214         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1215         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1216 }
1217
1218 /*
1219  * Set ASPM state.
1220  * Enable/disable L0s/L1 depend on link state.
1221  */
1222 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1223 {
1224         u32 pm_ctrl_data;
1225         u32 link_ctrl_data;
1226         u32 link_l1_timer = 0xF;
1227
1228         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1229         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
1230
1231         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1232         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1233                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1234         pm_ctrl_data &= ~(PM_CTRL_LCKDET_TIMER_MASK <<
1235                         PM_CTRL_LCKDET_TIMER_SHIFT);
1236         pm_ctrl_data |= AT_LCKDET_TIMER << PM_CTRL_LCKDET_TIMER_SHIFT;
1237
1238         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1239                 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1240                 link_ctrl_data &= ~LINK_CTRL_EXT_SYNC;
1241                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE)) {
1242                         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10)
1243                                 link_ctrl_data |= LINK_CTRL_EXT_SYNC;
1244                 }
1245
1246                 AT_WRITE_REG(hw, REG_LINK_CTRL, link_ctrl_data);
1247
1248                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER;
1249                 pm_ctrl_data &= ~(PM_CTRL_PM_REQ_TIMER_MASK <<
1250                         PM_CTRL_PM_REQ_TIMER_SHIFT);
1251                 pm_ctrl_data |= AT_ASPM_L1_TIMER <<
1252                         PM_CTRL_PM_REQ_TIMER_SHIFT;
1253                 pm_ctrl_data &= ~PM_CTRL_SA_DLY_EN;
1254                 pm_ctrl_data &= ~PM_CTRL_HOTRST;
1255                 pm_ctrl_data |= 1 << PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1256                 pm_ctrl_data |= PM_CTRL_SERDES_PD_EX_L1;
1257         }
1258         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1259         if (linkup) {
1260                 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1261                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1262                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1263                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1264                 if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1265                         pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN;
1266
1267                 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1268                         hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1269                         if (hw->nic_type == athr_l2c_b)
1270                                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE))
1271                                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1272                         pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1273                         pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1274                         pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1275                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1276                 if (hw->adapter->link_speed == SPEED_100 ||
1277                                 hw->adapter->link_speed == SPEED_1000) {
1278                                 pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1279                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1280                                 if (hw->nic_type == athr_l2c_b)
1281                                         link_l1_timer = 7;
1282                                 else if (hw->nic_type == athr_l2c_b2 ||
1283                                         hw->nic_type == athr_l1d_2)
1284                                         link_l1_timer = 4;
1285                                 pm_ctrl_data |= link_l1_timer <<
1286                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1287                         }
1288                 } else {
1289                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1290                         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1291                         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1292                         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1293                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1294                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1295
1296                 }
1297         } else {
1298                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1299                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1300                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1301                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1302
1303                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1304                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1305                 else
1306                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1307         }
1308         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1309
1310         return;
1311 }
1312
1313 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1314 {
1315         struct atl1c_hw *hw = &adapter->hw;
1316         struct net_device *netdev = adapter->netdev;
1317         u32 mac_ctrl_data;
1318
1319         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1320         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1321
1322         if (adapter->link_duplex == FULL_DUPLEX) {
1323                 hw->mac_duplex = true;
1324                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1325         }
1326
1327         if (adapter->link_speed == SPEED_1000)
1328                 hw->mac_speed = atl1c_mac_speed_1000;
1329         else
1330                 hw->mac_speed = atl1c_mac_speed_10_100;
1331
1332         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1333                         MAC_CTRL_SPEED_SHIFT;
1334
1335         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1336         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1337                         MAC_CTRL_PRMLEN_SHIFT);
1338
1339         __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
1340
1341         mac_ctrl_data |= MAC_CTRL_BC_EN;
1342         if (netdev->flags & IFF_PROMISC)
1343                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1344         if (netdev->flags & IFF_ALLMULTI)
1345                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1346
1347         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1348         if (hw->nic_type == athr_l1d || hw->nic_type == athr_l2c_b2 ||
1349             hw->nic_type == athr_l1d_2) {
1350                 mac_ctrl_data |= MAC_CTRL_SPEED_MODE_SW;
1351                 mac_ctrl_data |= MAC_CTRL_HASH_ALG_CRC32;
1352         }
1353         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1354 }
1355
1356 /*
1357  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1358  * @adapter: board private structure
1359  *
1360  * Configure the Tx /Rx unit of the MAC after a reset.
1361  */
1362 static int atl1c_configure(struct atl1c_adapter *adapter)
1363 {
1364         struct atl1c_hw *hw = &adapter->hw;
1365         u32 master_ctrl_data = 0;
1366         u32 intr_modrt_data;
1367         u32 data;
1368
1369         /* clear interrupt status */
1370         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1371         /*  Clear any WOL status */
1372         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1373         /* set Interrupt Clear Timer
1374          * HW will enable self to assert interrupt event to system after
1375          * waiting x-time for software to notify it accept interrupt.
1376          */
1377
1378         data = CLK_GATING_EN_ALL;
1379         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1380                 if (hw->nic_type == athr_l2c_b)
1381                         data &= ~CLK_GATING_RXMAC_EN;
1382         } else
1383                 data = 0;
1384         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1385
1386         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1387                 hw->ict & INT_RETRIG_TIMER_MASK);
1388
1389         atl1c_configure_des_ring(adapter);
1390
1391         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1392                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1393                                         IRQ_MODRT_TX_TIMER_SHIFT;
1394                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1395                                         IRQ_MODRT_RX_TIMER_SHIFT;
1396                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1397                 master_ctrl_data |=
1398                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1399         }
1400
1401         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1402                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1403
1404         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1405         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1406
1407         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1408                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1409
1410         /* set MTU */
1411         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1412                         VLAN_HLEN + ETH_FCS_LEN);
1413
1414         atl1c_configure_tx(adapter);
1415         atl1c_configure_rx(adapter);
1416         atl1c_configure_dma(adapter);
1417
1418         return 0;
1419 }
1420
1421 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1422 {
1423         u16 hw_reg_addr = 0;
1424         unsigned long *stats_item = NULL;
1425         u32 data;
1426
1427         /* update rx status */
1428         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1429         stats_item  = &adapter->hw_stats.rx_ok;
1430         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1431                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1432                 *stats_item += data;
1433                 stats_item++;
1434                 hw_reg_addr += 4;
1435         }
1436 /* update tx status */
1437         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1438         stats_item  = &adapter->hw_stats.tx_ok;
1439         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1440                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1441                 *stats_item += data;
1442                 stats_item++;
1443                 hw_reg_addr += 4;
1444         }
1445 }
1446
1447 /*
1448  * atl1c_get_stats - Get System Network Statistics
1449  * @netdev: network interface device structure
1450  *
1451  * Returns the address of the device statistics structure.
1452  * The statistics are actually updated from the timer callback.
1453  */
1454 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1455 {
1456         struct atl1c_adapter *adapter = netdev_priv(netdev);
1457         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1458         struct net_device_stats *net_stats = &netdev->stats;
1459
1460         atl1c_update_hw_stats(adapter);
1461         net_stats->rx_packets = hw_stats->rx_ok;
1462         net_stats->tx_packets = hw_stats->tx_ok;
1463         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1464         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1465         net_stats->multicast  = hw_stats->rx_mcast;
1466         net_stats->collisions = hw_stats->tx_1_col +
1467                                 hw_stats->tx_2_col * 2 +
1468                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1469         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1470                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1471                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1472         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1473         net_stats->rx_length_errors = hw_stats->rx_len_err;
1474         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1475         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1476         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1477
1478         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1479
1480         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1481                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1482         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1483         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1484         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1485
1486         return net_stats;
1487 }
1488
1489 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1490 {
1491         u16 phy_data;
1492
1493         spin_lock(&adapter->mdio_lock);
1494         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1495         spin_unlock(&adapter->mdio_lock);
1496 }
1497
1498 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1499                                 enum atl1c_trans_queue type)
1500 {
1501         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1502                                 &adapter->tpd_ring[type];
1503         struct atl1c_buffer *buffer_info;
1504         struct pci_dev *pdev = adapter->pdev;
1505         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1506         u16 hw_next_to_clean;
1507         u16 reg;
1508
1509         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1510
1511         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1512
1513         while (next_to_clean != hw_next_to_clean) {
1514                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1515                 atl1c_clean_buffer(pdev, buffer_info, 1);
1516                 if (++next_to_clean == tpd_ring->count)
1517                         next_to_clean = 0;
1518                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1519         }
1520
1521         if (netif_queue_stopped(adapter->netdev) &&
1522                         netif_carrier_ok(adapter->netdev)) {
1523                 netif_wake_queue(adapter->netdev);
1524         }
1525
1526         return true;
1527 }
1528
1529 /*
1530  * atl1c_intr - Interrupt Handler
1531  * @irq: interrupt number
1532  * @data: pointer to a network interface device structure
1533  * @pt_regs: CPU registers structure
1534  */
1535 static irqreturn_t atl1c_intr(int irq, void *data)
1536 {
1537         struct net_device *netdev  = data;
1538         struct atl1c_adapter *adapter = netdev_priv(netdev);
1539         struct pci_dev *pdev = adapter->pdev;
1540         struct atl1c_hw *hw = &adapter->hw;
1541         int max_ints = AT_MAX_INT_WORK;
1542         int handled = IRQ_NONE;
1543         u32 status;
1544         u32 reg_data;
1545
1546         do {
1547                 AT_READ_REG(hw, REG_ISR, &reg_data);
1548                 status = reg_data & hw->intr_mask;
1549
1550                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1551                         if (max_ints != AT_MAX_INT_WORK)
1552                                 handled = IRQ_HANDLED;
1553                         break;
1554                 }
1555                 /* link event */
1556                 if (status & ISR_GPHY)
1557                         atl1c_clear_phy_int(adapter);
1558                 /* Ack ISR */
1559                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1560                 if (status & ISR_RX_PKT) {
1561                         if (likely(napi_schedule_prep(&adapter->napi))) {
1562                                 hw->intr_mask &= ~ISR_RX_PKT;
1563                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1564                                 __napi_schedule(&adapter->napi);
1565                         }
1566                 }
1567                 if (status & ISR_TX_PKT)
1568                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1569
1570                 handled = IRQ_HANDLED;
1571                 /* check if PCIE PHY Link down */
1572                 if (status & ISR_ERROR) {
1573                         if (netif_msg_hw(adapter))
1574                                 dev_err(&pdev->dev,
1575                                         "atl1c hardware error (status = 0x%x)\n",
1576                                         status & ISR_ERROR);
1577                         /* reset MAC */
1578                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1579                         schedule_work(&adapter->common_task);
1580                         return IRQ_HANDLED;
1581                 }
1582
1583                 if (status & ISR_OVER)
1584                         if (netif_msg_intr(adapter))
1585                                 dev_warn(&pdev->dev,
1586                                         "TX/RX overflow (status = 0x%x)\n",
1587                                         status & ISR_OVER);
1588
1589                 /* link event */
1590                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1591                         netdev->stats.tx_carrier_errors++;
1592                         atl1c_link_chg_event(adapter);
1593                         break;
1594                 }
1595
1596         } while (--max_ints > 0);
1597         /* re-enable Interrupt*/
1598         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1599         return handled;
1600 }
1601
1602 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1603                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1604 {
1605         /*
1606          * The pid field in RRS in not correct sometimes, so we
1607          * cannot figure out if the packet is fragmented or not,
1608          * so we tell the KERNEL CHECKSUM_NONE
1609          */
1610         skb_checksum_none_assert(skb);
1611 }
1612
1613 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1614 {
1615         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1616         struct pci_dev *pdev = adapter->pdev;
1617         struct atl1c_buffer *buffer_info, *next_info;
1618         struct sk_buff *skb;
1619         void *vir_addr = NULL;
1620         u16 num_alloc = 0;
1621         u16 rfd_next_to_use, next_next;
1622         struct atl1c_rx_free_desc *rfd_desc;
1623
1624         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1625         if (++next_next == rfd_ring->count)
1626                 next_next = 0;
1627         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1628         next_info = &rfd_ring->buffer_info[next_next];
1629
1630         while (next_info->flags & ATL1C_BUFFER_FREE) {
1631                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1632
1633                 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len);
1634                 if (unlikely(!skb)) {
1635                         if (netif_msg_rx_err(adapter))
1636                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1637                         break;
1638                 }
1639
1640                 /*
1641                  * Make buffer alignment 2 beyond a 16 byte boundary
1642                  * this will result in a 16 byte aligned IP header after
1643                  * the 14 byte MAC header is removed
1644                  */
1645                 vir_addr = skb->data;
1646                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1647                 buffer_info->skb = skb;
1648                 buffer_info->length = adapter->rx_buffer_len;
1649                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1650                                                 buffer_info->length,
1651                                                 PCI_DMA_FROMDEVICE);
1652                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1653                         ATL1C_PCIMAP_FROMDEVICE);
1654                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1655                 rfd_next_to_use = next_next;
1656                 if (++next_next == rfd_ring->count)
1657                         next_next = 0;
1658                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1659                 next_info = &rfd_ring->buffer_info[next_next];
1660                 num_alloc++;
1661         }
1662
1663         if (num_alloc) {
1664                 /* TODO: update mailbox here */
1665                 wmb();
1666                 rfd_ring->next_to_use = rfd_next_to_use;
1667                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1668                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1669         }
1670
1671         return num_alloc;
1672 }
1673
1674 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1675                         struct  atl1c_recv_ret_status *rrs, u16 num)
1676 {
1677         u16 i;
1678         /* the relationship between rrd and rfd is one map one */
1679         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1680                                         rrd_ring->next_to_clean)) {
1681                 rrs->word3 &= ~RRS_RXD_UPDATED;
1682                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1683                         rrd_ring->next_to_clean = 0;
1684         }
1685 }
1686
1687 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1688         struct atl1c_recv_ret_status *rrs, u16 num)
1689 {
1690         u16 i;
1691         u16 rfd_index;
1692         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1693
1694         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1695                         RRS_RX_RFD_INDEX_MASK;
1696         for (i = 0; i < num; i++) {
1697                 buffer_info[rfd_index].skb = NULL;
1698                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1699                                         ATL1C_BUFFER_FREE);
1700                 if (++rfd_index == rfd_ring->count)
1701                         rfd_index = 0;
1702         }
1703         rfd_ring->next_to_clean = rfd_index;
1704 }
1705
1706 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1707                    int *work_done, int work_to_do)
1708 {
1709         u16 rfd_num, rfd_index;
1710         u16 count = 0;
1711         u16 length;
1712         struct pci_dev *pdev = adapter->pdev;
1713         struct net_device *netdev  = adapter->netdev;
1714         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1715         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1716         struct sk_buff *skb;
1717         struct atl1c_recv_ret_status *rrs;
1718         struct atl1c_buffer *buffer_info;
1719
1720         while (1) {
1721                 if (*work_done >= work_to_do)
1722                         break;
1723                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1724                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1725                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1726                                 RRS_RX_RFD_CNT_MASK;
1727                         if (unlikely(rfd_num != 1))
1728                                 /* TODO support mul rfd*/
1729                                 if (netif_msg_rx_err(adapter))
1730                                         dev_warn(&pdev->dev,
1731                                                 "Multi rfd not support yet!\n");
1732                         goto rrs_checked;
1733                 } else {
1734                         break;
1735                 }
1736 rrs_checked:
1737                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1738                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1739                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1740                                 if (netif_msg_rx_err(adapter))
1741                                         dev_warn(&pdev->dev,
1742                                                 "wrong packet! rrs word3 is %x\n",
1743                                                 rrs->word3);
1744                         continue;
1745                 }
1746
1747                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1748                                 RRS_PKT_SIZE_MASK);
1749                 /* Good Receive */
1750                 if (likely(rfd_num == 1)) {
1751                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1752                                         RRS_RX_RFD_INDEX_MASK;
1753                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1754                         pci_unmap_single(pdev, buffer_info->dma,
1755                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1756                         skb = buffer_info->skb;
1757                 } else {
1758                         /* TODO */
1759                         if (netif_msg_rx_err(adapter))
1760                                 dev_warn(&pdev->dev,
1761                                         "Multi rfd not support yet!\n");
1762                         break;
1763                 }
1764                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1765                 skb_put(skb, length - ETH_FCS_LEN);
1766                 skb->protocol = eth_type_trans(skb, netdev);
1767                 atl1c_rx_checksum(adapter, skb, rrs);
1768                 if (rrs->word3 & RRS_VLAN_INS) {
1769                         u16 vlan;
1770
1771                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1772                         vlan = le16_to_cpu(vlan);
1773                         __vlan_hwaccel_put_tag(skb, vlan);
1774                 }
1775                 netif_receive_skb(skb);
1776
1777                 (*work_done)++;
1778                 count++;
1779         }
1780         if (count)
1781                 atl1c_alloc_rx_buffer(adapter);
1782 }
1783
1784 /*
1785  * atl1c_clean - NAPI Rx polling callback
1786  * @adapter: board private structure
1787  */
1788 static int atl1c_clean(struct napi_struct *napi, int budget)
1789 {
1790         struct atl1c_adapter *adapter =
1791                         container_of(napi, struct atl1c_adapter, napi);
1792         int work_done = 0;
1793
1794         /* Keep link state information with original netdev */
1795         if (!netif_carrier_ok(adapter->netdev))
1796                 goto quit_polling;
1797         /* just enable one RXQ */
1798         atl1c_clean_rx_irq(adapter, &work_done, budget);
1799
1800         if (work_done < budget) {
1801 quit_polling:
1802                 napi_complete(napi);
1803                 adapter->hw.intr_mask |= ISR_RX_PKT;
1804                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1805         }
1806         return work_done;
1807 }
1808
1809 #ifdef CONFIG_NET_POLL_CONTROLLER
1810
1811 /*
1812  * Polling 'interrupt' - used by things like netconsole to send skbs
1813  * without having to re-enable interrupts. It's not called while
1814  * the interrupt routine is executing.
1815  */
1816 static void atl1c_netpoll(struct net_device *netdev)
1817 {
1818         struct atl1c_adapter *adapter = netdev_priv(netdev);
1819
1820         disable_irq(adapter->pdev->irq);
1821         atl1c_intr(adapter->pdev->irq, netdev);
1822         enable_irq(adapter->pdev->irq);
1823 }
1824 #endif
1825
1826 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1827 {
1828         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1829         u16 next_to_use = 0;
1830         u16 next_to_clean = 0;
1831
1832         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1833         next_to_use   = tpd_ring->next_to_use;
1834
1835         return (u16)(next_to_clean > next_to_use) ?
1836                 (next_to_clean - next_to_use - 1) :
1837                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1838 }
1839
1840 /*
1841  * get next usable tpd
1842  * Note: should call atl1c_tdp_avail to make sure
1843  * there is enough tpd to use
1844  */
1845 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1846         enum atl1c_trans_queue type)
1847 {
1848         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1849         struct atl1c_tpd_desc *tpd_desc;
1850         u16 next_to_use = 0;
1851
1852         next_to_use = tpd_ring->next_to_use;
1853         if (++tpd_ring->next_to_use == tpd_ring->count)
1854                 tpd_ring->next_to_use = 0;
1855         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1856         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1857         return  tpd_desc;
1858 }
1859
1860 static struct atl1c_buffer *
1861 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1862 {
1863         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1864
1865         return &tpd_ring->buffer_info[tpd -
1866                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1867 }
1868
1869 /* Calculate the transmit packet descript needed*/
1870 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1871 {
1872         u16 tpd_req;
1873         u16 proto_hdr_len = 0;
1874
1875         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1876
1877         if (skb_is_gso(skb)) {
1878                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1879                 if (proto_hdr_len < skb_headlen(skb))
1880                         tpd_req++;
1881                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1882                         tpd_req++;
1883         }
1884         return tpd_req;
1885 }
1886
1887 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1888                           struct sk_buff *skb,
1889                           struct atl1c_tpd_desc **tpd,
1890                           enum atl1c_trans_queue type)
1891 {
1892         struct pci_dev *pdev = adapter->pdev;
1893         u8 hdr_len;
1894         u32 real_len;
1895         unsigned short offload_type;
1896         int err;
1897
1898         if (skb_is_gso(skb)) {
1899                 if (skb_header_cloned(skb)) {
1900                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1901                         if (unlikely(err))
1902                                 return -1;
1903                 }
1904                 offload_type = skb_shinfo(skb)->gso_type;
1905
1906                 if (offload_type & SKB_GSO_TCPV4) {
1907                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1908                                         + ntohs(ip_hdr(skb)->tot_len));
1909
1910                         if (real_len < skb->len)
1911                                 pskb_trim(skb, real_len);
1912
1913                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1914                         if (unlikely(skb->len == hdr_len)) {
1915                                 /* only xsum need */
1916                                 if (netif_msg_tx_queued(adapter))
1917                                         dev_warn(&pdev->dev,
1918                                                 "IPV4 tso with zero data??\n");
1919                                 goto check_sum;
1920                         } else {
1921                                 ip_hdr(skb)->check = 0;
1922                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1923                                                         ip_hdr(skb)->saddr,
1924                                                         ip_hdr(skb)->daddr,
1925                                                         0, IPPROTO_TCP, 0);
1926                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1927                         }
1928                 }
1929
1930                 if (offload_type & SKB_GSO_TCPV6) {
1931                         struct atl1c_tpd_ext_desc *etpd =
1932                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1933
1934                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1935                         *tpd = atl1c_get_tpd(adapter, type);
1936                         ipv6_hdr(skb)->payload_len = 0;
1937                         /* check payload == 0 byte ? */
1938                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1939                         if (unlikely(skb->len == hdr_len)) {
1940                                 /* only xsum need */
1941                                 if (netif_msg_tx_queued(adapter))
1942                                         dev_warn(&pdev->dev,
1943                                                 "IPV6 tso with zero data??\n");
1944                                 goto check_sum;
1945                         } else
1946                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1947                                                 &ipv6_hdr(skb)->saddr,
1948                                                 &ipv6_hdr(skb)->daddr,
1949                                                 0, IPPROTO_TCP, 0);
1950                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1951                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1952                         etpd->pkt_len = cpu_to_le32(skb->len);
1953                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1954                 }
1955
1956                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1957                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1958                                 TPD_TCPHDR_OFFSET_SHIFT;
1959                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1960                                 TPD_MSS_SHIFT;
1961                 return 0;
1962         }
1963
1964 check_sum:
1965         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1966                 u8 css, cso;
1967                 cso = skb_checksum_start_offset(skb);
1968
1969                 if (unlikely(cso & 0x1)) {
1970                         if (netif_msg_tx_err(adapter))
1971                                 dev_err(&adapter->pdev->dev,
1972                                         "payload offset should not an event number\n");
1973                         return -1;
1974                 } else {
1975                         css = cso + skb->csum_offset;
1976
1977                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1978                                         TPD_PLOADOFFSET_SHIFT;
1979                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1980                                         TPD_CCSUM_OFFSET_SHIFT;
1981                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1982                 }
1983         }
1984         return 0;
1985 }
1986
1987 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1988                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1989                         enum atl1c_trans_queue type)
1990 {
1991         struct atl1c_tpd_desc *use_tpd = NULL;
1992         struct atl1c_buffer *buffer_info = NULL;
1993         u16 buf_len = skb_headlen(skb);
1994         u16 map_len = 0;
1995         u16 mapped_len = 0;
1996         u16 hdr_len = 0;
1997         u16 nr_frags;
1998         u16 f;
1999         int tso;
2000
2001         nr_frags = skb_shinfo(skb)->nr_frags;
2002         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2003         if (tso) {
2004                 /* TSO */
2005                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2006                 use_tpd = tpd;
2007
2008                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2009                 buffer_info->length = map_len;
2010                 buffer_info->dma = pci_map_single(adapter->pdev,
2011                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2012                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2013                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2014                         ATL1C_PCIMAP_TODEVICE);
2015                 mapped_len += map_len;
2016                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2017                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2018         }
2019
2020         if (mapped_len < buf_len) {
2021                 /* mapped_len == 0, means we should use the first tpd,
2022                    which is given by caller  */
2023                 if (mapped_len == 0)
2024                         use_tpd = tpd;
2025                 else {
2026                         use_tpd = atl1c_get_tpd(adapter, type);
2027                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2028                 }
2029                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2030                 buffer_info->length = buf_len - mapped_len;
2031                 buffer_info->dma =
2032                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2033                                         buffer_info->length, PCI_DMA_TODEVICE);
2034                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2035                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2036                         ATL1C_PCIMAP_TODEVICE);
2037                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2038                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2039         }
2040
2041         for (f = 0; f < nr_frags; f++) {
2042                 struct skb_frag_struct *frag;
2043
2044                 frag = &skb_shinfo(skb)->frags[f];
2045
2046                 use_tpd = atl1c_get_tpd(adapter, type);
2047                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2048
2049                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2050                 buffer_info->length = skb_frag_size(frag);
2051                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2052                                                     frag, 0,
2053                                                     buffer_info->length,
2054                                                     DMA_TO_DEVICE);
2055                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2056                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2057                         ATL1C_PCIMAP_TODEVICE);
2058                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2059                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2060         }
2061
2062         /* The last tpd */
2063         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2064         /* The last buffer info contain the skb address,
2065            so it will be free after unmap */
2066         buffer_info->skb = skb;
2067 }
2068
2069 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2070                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2071 {
2072         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2073         u16 reg;
2074
2075         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2076         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2077 }
2078
2079 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2080                                           struct net_device *netdev)
2081 {
2082         struct atl1c_adapter *adapter = netdev_priv(netdev);
2083         unsigned long flags;
2084         u16 tpd_req = 1;
2085         struct atl1c_tpd_desc *tpd;
2086         enum atl1c_trans_queue type = atl1c_trans_normal;
2087
2088         if (test_bit(__AT_DOWN, &adapter->flags)) {
2089                 dev_kfree_skb_any(skb);
2090                 return NETDEV_TX_OK;
2091         }
2092
2093         tpd_req = atl1c_cal_tpd_req(skb);
2094         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2095                 if (netif_msg_pktdata(adapter))
2096                         dev_info(&adapter->pdev->dev, "tx locked\n");
2097                 return NETDEV_TX_LOCKED;
2098         }
2099
2100         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2101                 /* no enough descriptor, just stop queue */
2102                 netif_stop_queue(netdev);
2103                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2104                 return NETDEV_TX_BUSY;
2105         }
2106
2107         tpd = atl1c_get_tpd(adapter, type);
2108
2109         /* do TSO and check sum */
2110         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2111                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2112                 dev_kfree_skb_any(skb);
2113                 return NETDEV_TX_OK;
2114         }
2115
2116         if (unlikely(vlan_tx_tag_present(skb))) {
2117                 u16 vlan = vlan_tx_tag_get(skb);
2118                 __le16 tag;
2119
2120                 vlan = cpu_to_le16(vlan);
2121                 AT_VLAN_TO_TAG(vlan, tag);
2122                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2123                 tpd->vlan_tag = tag;
2124         }
2125
2126         if (skb_network_offset(skb) != ETH_HLEN)
2127                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2128
2129         atl1c_tx_map(adapter, skb, tpd, type);
2130         atl1c_tx_queue(adapter, skb, tpd, type);
2131
2132         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2133         return NETDEV_TX_OK;
2134 }
2135
2136 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2137 {
2138         struct net_device *netdev = adapter->netdev;
2139
2140         free_irq(adapter->pdev->irq, netdev);
2141
2142         if (adapter->have_msi)
2143                 pci_disable_msi(adapter->pdev);
2144 }
2145
2146 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2147 {
2148         struct pci_dev    *pdev   = adapter->pdev;
2149         struct net_device *netdev = adapter->netdev;
2150         int flags = 0;
2151         int err = 0;
2152
2153         adapter->have_msi = true;
2154         err = pci_enable_msi(adapter->pdev);
2155         if (err) {
2156                 if (netif_msg_ifup(adapter))
2157                         dev_err(&pdev->dev,
2158                                 "Unable to allocate MSI interrupt Error: %d\n",
2159                                 err);
2160                 adapter->have_msi = false;
2161         }
2162
2163         if (!adapter->have_msi)
2164                 flags |= IRQF_SHARED;
2165         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2166                         netdev->name, netdev);
2167         if (err) {
2168                 if (netif_msg_ifup(adapter))
2169                         dev_err(&pdev->dev,
2170                                 "Unable to allocate interrupt Error: %d\n",
2171                                 err);
2172                 if (adapter->have_msi)
2173                         pci_disable_msi(adapter->pdev);
2174                 return err;
2175         }
2176         if (netif_msg_ifup(adapter))
2177                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2178         return err;
2179 }
2180
2181 static int atl1c_up(struct atl1c_adapter *adapter)
2182 {
2183         struct net_device *netdev = adapter->netdev;
2184         int num;
2185         int err;
2186
2187         netif_carrier_off(netdev);
2188         atl1c_init_ring_ptrs(adapter);
2189         atl1c_set_multi(netdev);
2190         atl1c_restore_vlan(adapter);
2191
2192         num = atl1c_alloc_rx_buffer(adapter);
2193         if (unlikely(num == 0)) {
2194                 err = -ENOMEM;
2195                 goto err_alloc_rx;
2196         }
2197
2198         if (atl1c_configure(adapter)) {
2199                 err = -EIO;
2200                 goto err_up;
2201         }
2202
2203         err = atl1c_request_irq(adapter);
2204         if (unlikely(err))
2205                 goto err_up;
2206
2207         clear_bit(__AT_DOWN, &adapter->flags);
2208         napi_enable(&adapter->napi);
2209         atl1c_irq_enable(adapter);
2210         atl1c_check_link_status(adapter);
2211         netif_start_queue(netdev);
2212         return err;
2213
2214 err_up:
2215 err_alloc_rx:
2216         atl1c_clean_rx_ring(adapter);
2217         return err;
2218 }
2219
2220 static void atl1c_down(struct atl1c_adapter *adapter)
2221 {
2222         struct net_device *netdev = adapter->netdev;
2223
2224         atl1c_del_timer(adapter);
2225         adapter->work_event = 0; /* clear all event */
2226         /* signal that we're down so the interrupt handler does not
2227          * reschedule our watchdog timer */
2228         set_bit(__AT_DOWN, &adapter->flags);
2229         netif_carrier_off(netdev);
2230         napi_disable(&adapter->napi);
2231         atl1c_irq_disable(adapter);
2232         atl1c_free_irq(adapter);
2233         /* reset MAC to disable all RX/TX */
2234         atl1c_reset_mac(&adapter->hw);
2235         msleep(1);
2236
2237         adapter->link_speed = SPEED_0;
2238         adapter->link_duplex = -1;
2239         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2240         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2241         atl1c_clean_rx_ring(adapter);
2242 }
2243
2244 /*
2245  * atl1c_open - Called when a network interface is made active
2246  * @netdev: network interface device structure
2247  *
2248  * Returns 0 on success, negative value on failure
2249  *
2250  * The open entry point is called when a network interface is made
2251  * active by the system (IFF_UP).  At this point all resources needed
2252  * for transmit and receive operations are allocated, the interrupt
2253  * handler is registered with the OS, the watchdog timer is started,
2254  * and the stack is notified that the interface is ready.
2255  */
2256 static int atl1c_open(struct net_device *netdev)
2257 {
2258         struct atl1c_adapter *adapter = netdev_priv(netdev);
2259         int err;
2260
2261         /* disallow open during test */
2262         if (test_bit(__AT_TESTING, &adapter->flags))
2263                 return -EBUSY;
2264
2265         /* allocate rx/tx dma buffer & descriptors */
2266         err = atl1c_setup_ring_resources(adapter);
2267         if (unlikely(err))
2268                 return err;
2269
2270         err = atl1c_up(adapter);
2271         if (unlikely(err))
2272                 goto err_up;
2273
2274         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2275                 u32 phy_data;
2276
2277                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2278                 phy_data |= MDIO_AP_EN;
2279                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2280         }
2281         return 0;
2282
2283 err_up:
2284         atl1c_free_irq(adapter);
2285         atl1c_free_ring_resources(adapter);
2286         atl1c_reset_mac(&adapter->hw);
2287         return err;
2288 }
2289
2290 /*
2291  * atl1c_close - Disables a network interface
2292  * @netdev: network interface device structure
2293  *
2294  * Returns 0, this is not allowed to fail
2295  *
2296  * The close entry point is called when an interface is de-activated
2297  * by the OS.  The hardware is still under the drivers control, but
2298  * needs to be disabled.  A global MAC reset is issued to stop the
2299  * hardware, and all transmit and receive resources are freed.
2300  */
2301 static int atl1c_close(struct net_device *netdev)
2302 {
2303         struct atl1c_adapter *adapter = netdev_priv(netdev);
2304
2305         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2306         atl1c_down(adapter);
2307         atl1c_free_ring_resources(adapter);
2308         return 0;
2309 }
2310
2311 static int atl1c_suspend(struct device *dev)
2312 {
2313         struct pci_dev *pdev = to_pci_dev(dev);
2314         struct net_device *netdev = pci_get_drvdata(pdev);
2315         struct atl1c_adapter *adapter = netdev_priv(netdev);
2316         struct atl1c_hw *hw = &adapter->hw;
2317         u32 mac_ctrl_data = 0;
2318         u32 master_ctrl_data = 0;
2319         u32 wol_ctrl_data = 0;
2320         u16 mii_intr_status_data = 0;
2321         u32 wufc = adapter->wol;
2322
2323         atl1c_disable_l0s_l1(hw);
2324         if (netif_running(netdev)) {
2325                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2326                 atl1c_down(adapter);
2327         }
2328         netif_device_detach(netdev);
2329
2330         if (wufc)
2331                 if (atl1c_phy_power_saving(hw) != 0)
2332                         dev_dbg(&pdev->dev, "phy power saving failed");
2333
2334         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2335         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
2336
2337         master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2338         mac_ctrl_data &= ~(MAC_CTRL_PRMLEN_MASK << MAC_CTRL_PRMLEN_SHIFT);
2339         mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2340                         MAC_CTRL_PRMLEN_MASK) <<
2341                         MAC_CTRL_PRMLEN_SHIFT);
2342         mac_ctrl_data &= ~(MAC_CTRL_SPEED_MASK << MAC_CTRL_SPEED_SHIFT);
2343         mac_ctrl_data &= ~MAC_CTRL_DUPLX;
2344
2345         if (wufc) {
2346                 mac_ctrl_data |= MAC_CTRL_RX_EN;
2347                 if (adapter->link_speed == SPEED_1000 ||
2348                         adapter->link_speed == SPEED_0) {
2349                         mac_ctrl_data |= atl1c_mac_speed_1000 <<
2350                                         MAC_CTRL_SPEED_SHIFT;
2351                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2352                 } else
2353                         mac_ctrl_data |= atl1c_mac_speed_10_100 <<
2354                                         MAC_CTRL_SPEED_SHIFT;
2355
2356                 if (adapter->link_duplex == DUPLEX_FULL)
2357                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2358
2359                 /* turn on magic packet wol */
2360                 if (wufc & AT_WUFC_MAG)
2361                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2362
2363                 if (wufc & AT_WUFC_LNKC) {
2364                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2365                         /* only link up can wake up */
2366                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2367                                 dev_dbg(&pdev->dev, "%s: read write phy "
2368                                                   "register failed.\n",
2369                                                   atl1c_driver_name);
2370                         }
2371                 }
2372                 /* clear phy interrupt */
2373                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2374                 /* Config MAC Ctrl register */
2375                 __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
2376
2377                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2378                 if (wufc & AT_WUFC_MAG)
2379                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2380
2381                 dev_dbg(&pdev->dev,
2382                         "%s: suspend MAC=0x%x\n",
2383                         atl1c_driver_name, mac_ctrl_data);
2384                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2385                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2386                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2387
2388                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
2389                         GPHY_CTRL_EXT_RESET);
2390         } else {
2391                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_POWER_SAVING);
2392                 master_ctrl_data |= MASTER_CTRL_CLK_SEL_DIS;
2393                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2394                 mac_ctrl_data |= MAC_CTRL_DUPLX;
2395                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2396                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2397                 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2398                 hw->phy_configured = false; /* re-init PHY when resume */
2399         }
2400
2401         return 0;
2402 }
2403
2404 #ifdef CONFIG_PM_SLEEP
2405 static int atl1c_resume(struct device *dev)
2406 {
2407         struct pci_dev *pdev = to_pci_dev(dev);
2408         struct net_device *netdev = pci_get_drvdata(pdev);
2409         struct atl1c_adapter *adapter = netdev_priv(netdev);
2410
2411         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2412         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2413                         ATL1C_PCIE_PHY_RESET);
2414
2415         atl1c_phy_reset(&adapter->hw);
2416         atl1c_reset_mac(&adapter->hw);
2417         atl1c_phy_init(&adapter->hw);
2418
2419 #if 0
2420         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2421         pm_data &= ~PM_CTRLSTAT_PME_EN;
2422         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2423 #endif
2424
2425         netif_device_attach(netdev);
2426         if (netif_running(netdev))
2427                 atl1c_up(adapter);
2428
2429         return 0;
2430 }
2431 #endif
2432
2433 static void atl1c_shutdown(struct pci_dev *pdev)
2434 {
2435         struct net_device *netdev = pci_get_drvdata(pdev);
2436         struct atl1c_adapter *adapter = netdev_priv(netdev);
2437
2438         atl1c_suspend(&pdev->dev);
2439         pci_wake_from_d3(pdev, adapter->wol);
2440         pci_set_power_state(pdev, PCI_D3hot);
2441 }
2442
2443 static const struct net_device_ops atl1c_netdev_ops = {
2444         .ndo_open               = atl1c_open,
2445         .ndo_stop               = atl1c_close,
2446         .ndo_validate_addr      = eth_validate_addr,
2447         .ndo_start_xmit         = atl1c_xmit_frame,
2448         .ndo_set_mac_address    = atl1c_set_mac_addr,
2449         .ndo_set_rx_mode        = atl1c_set_multi,
2450         .ndo_change_mtu         = atl1c_change_mtu,
2451         .ndo_fix_features       = atl1c_fix_features,
2452         .ndo_set_features       = atl1c_set_features,
2453         .ndo_do_ioctl           = atl1c_ioctl,
2454         .ndo_tx_timeout         = atl1c_tx_timeout,
2455         .ndo_get_stats          = atl1c_get_stats,
2456 #ifdef CONFIG_NET_POLL_CONTROLLER
2457         .ndo_poll_controller    = atl1c_netpoll,
2458 #endif
2459 };
2460
2461 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2462 {
2463         SET_NETDEV_DEV(netdev, &pdev->dev);
2464         pci_set_drvdata(pdev, netdev);
2465
2466         netdev->netdev_ops = &atl1c_netdev_ops;
2467         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2468         atl1c_set_ethtool_ops(netdev);
2469
2470         /* TODO: add when ready */
2471         netdev->hw_features =   NETIF_F_SG         |
2472                                 NETIF_F_HW_CSUM    |
2473                                 NETIF_F_HW_VLAN_RX |
2474                                 NETIF_F_TSO        |
2475                                 NETIF_F_TSO6;
2476         netdev->features =      netdev->hw_features |
2477                                 NETIF_F_HW_VLAN_TX;
2478         return 0;
2479 }
2480
2481 /*
2482  * atl1c_probe - Device Initialization Routine
2483  * @pdev: PCI device information struct
2484  * @ent: entry in atl1c_pci_tbl
2485  *
2486  * Returns 0 on success, negative on failure
2487  *
2488  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2489  * The OS initialization, configuring of the adapter private structure,
2490  * and a hardware reset occur.
2491  */
2492 static int __devinit atl1c_probe(struct pci_dev *pdev,
2493                                  const struct pci_device_id *ent)
2494 {
2495         struct net_device *netdev;
2496         struct atl1c_adapter *adapter;
2497         static int cards_found;
2498
2499         int err = 0;
2500
2501         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2502         err = pci_enable_device_mem(pdev);
2503         if (err) {
2504                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2505                 return err;
2506         }
2507
2508         /*
2509          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2510          * shared register for the high 32 bits, so only a single, aligned,
2511          * 4 GB physical address range can be used at a time.
2512          *
2513          * Supporting 64-bit DMA on this hardware is more trouble than it's
2514          * worth.  It is far easier to limit to 32-bit DMA than update
2515          * various kernel subsystems to support the mechanics required by a
2516          * fixed-high-32-bit system.
2517          */
2518         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2519             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2520                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2521                 goto err_dma;
2522         }
2523
2524         err = pci_request_regions(pdev, atl1c_driver_name);
2525         if (err) {
2526                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2527                 goto err_pci_reg;
2528         }
2529
2530         pci_set_master(pdev);
2531
2532         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2533         if (netdev == NULL) {
2534                 err = -ENOMEM;
2535                 goto err_alloc_etherdev;
2536         }
2537
2538         err = atl1c_init_netdev(netdev, pdev);
2539         if (err) {
2540                 dev_err(&pdev->dev, "init netdevice failed\n");
2541                 goto err_init_netdev;
2542         }
2543         adapter = netdev_priv(netdev);
2544         adapter->bd_number = cards_found;
2545         adapter->netdev = netdev;
2546         adapter->pdev = pdev;
2547         adapter->hw.adapter = adapter;
2548         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2549         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2550         if (!adapter->hw.hw_addr) {
2551                 err = -EIO;
2552                 dev_err(&pdev->dev, "cannot map device registers\n");
2553                 goto err_ioremap;
2554         }
2555
2556         /* init mii data */
2557         adapter->mii.dev = netdev;
2558         adapter->mii.mdio_read  = atl1c_mdio_read;
2559         adapter->mii.mdio_write = atl1c_mdio_write;
2560         adapter->mii.phy_id_mask = 0x1f;
2561         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2562         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2563         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2564                         (unsigned long)adapter);
2565         /* setup the private structure */
2566         err = atl1c_sw_init(adapter);
2567         if (err) {
2568                 dev_err(&pdev->dev, "net device private data init failed\n");
2569                 goto err_sw_init;
2570         }
2571         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2572                         ATL1C_PCIE_PHY_RESET);
2573
2574         /* Init GPHY as early as possible due to power saving issue  */
2575         atl1c_phy_reset(&adapter->hw);
2576
2577         err = atl1c_reset_mac(&adapter->hw);
2578         if (err) {
2579                 err = -EIO;
2580                 goto err_reset;
2581         }
2582
2583         /* reset the controller to
2584          * put the device in a known good starting state */
2585         err = atl1c_phy_init(&adapter->hw);
2586         if (err) {
2587                 err = -EIO;
2588                 goto err_reset;
2589         }
2590         if (atl1c_read_mac_addr(&adapter->hw)) {
2591                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2592                 netdev->addr_assign_type |= NET_ADDR_RANDOM;
2593         }
2594         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2595         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2596         if (netif_msg_probe(adapter))
2597                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2598                         adapter->hw.mac_addr);
2599
2600         atl1c_hw_set_mac_addr(&adapter->hw);
2601         INIT_WORK(&adapter->common_task, atl1c_common_task);
2602         adapter->work_event = 0;
2603         err = register_netdev(netdev);
2604         if (err) {
2605                 dev_err(&pdev->dev, "register netdevice failed\n");
2606                 goto err_register;
2607         }
2608
2609         if (netif_msg_probe(adapter))
2610                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2611         cards_found++;
2612         return 0;
2613
2614 err_reset:
2615 err_register:
2616 err_sw_init:
2617         iounmap(adapter->hw.hw_addr);
2618 err_init_netdev:
2619 err_ioremap:
2620         free_netdev(netdev);
2621 err_alloc_etherdev:
2622         pci_release_regions(pdev);
2623 err_pci_reg:
2624 err_dma:
2625         pci_disable_device(pdev);
2626         return err;
2627 }
2628
2629 /*
2630  * atl1c_remove - Device Removal Routine
2631  * @pdev: PCI device information struct
2632  *
2633  * atl1c_remove is called by the PCI subsystem to alert the driver
2634  * that it should release a PCI device.  The could be caused by a
2635  * Hot-Plug event, or because the driver is going to be removed from
2636  * memory.
2637  */
2638 static void __devexit atl1c_remove(struct pci_dev *pdev)
2639 {
2640         struct net_device *netdev = pci_get_drvdata(pdev);
2641         struct atl1c_adapter *adapter = netdev_priv(netdev);
2642
2643         unregister_netdev(netdev);
2644         atl1c_phy_disable(&adapter->hw);
2645
2646         iounmap(adapter->hw.hw_addr);
2647
2648         pci_release_regions(pdev);
2649         pci_disable_device(pdev);
2650         free_netdev(netdev);
2651 }
2652
2653 /*
2654  * atl1c_io_error_detected - called when PCI error is detected
2655  * @pdev: Pointer to PCI device
2656  * @state: The current pci connection state
2657  *
2658  * This function is called after a PCI bus error affecting
2659  * this device has been detected.
2660  */
2661 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2662                                                 pci_channel_state_t state)
2663 {
2664         struct net_device *netdev = pci_get_drvdata(pdev);
2665         struct atl1c_adapter *adapter = netdev_priv(netdev);
2666
2667         netif_device_detach(netdev);
2668
2669         if (state == pci_channel_io_perm_failure)
2670                 return PCI_ERS_RESULT_DISCONNECT;
2671
2672         if (netif_running(netdev))
2673                 atl1c_down(adapter);
2674
2675         pci_disable_device(pdev);
2676
2677         /* Request a slot slot reset. */
2678         return PCI_ERS_RESULT_NEED_RESET;
2679 }
2680
2681 /*
2682  * atl1c_io_slot_reset - called after the pci bus has been reset.
2683  * @pdev: Pointer to PCI device
2684  *
2685  * Restart the card from scratch, as if from a cold-boot. Implementation
2686  * resembles the first-half of the e1000_resume routine.
2687  */
2688 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2689 {
2690         struct net_device *netdev = pci_get_drvdata(pdev);
2691         struct atl1c_adapter *adapter = netdev_priv(netdev);
2692
2693         if (pci_enable_device(pdev)) {
2694                 if (netif_msg_hw(adapter))
2695                         dev_err(&pdev->dev,
2696                                 "Cannot re-enable PCI device after reset\n");
2697                 return PCI_ERS_RESULT_DISCONNECT;
2698         }
2699         pci_set_master(pdev);
2700
2701         pci_enable_wake(pdev, PCI_D3hot, 0);
2702         pci_enable_wake(pdev, PCI_D3cold, 0);
2703
2704         atl1c_reset_mac(&adapter->hw);
2705
2706         return PCI_ERS_RESULT_RECOVERED;
2707 }
2708
2709 /*
2710  * atl1c_io_resume - called when traffic can start flowing again.
2711  * @pdev: Pointer to PCI device
2712  *
2713  * This callback is called when the error recovery driver tells us that
2714  * its OK to resume normal operation. Implementation resembles the
2715  * second-half of the atl1c_resume routine.
2716  */
2717 static void atl1c_io_resume(struct pci_dev *pdev)
2718 {
2719         struct net_device *netdev = pci_get_drvdata(pdev);
2720         struct atl1c_adapter *adapter = netdev_priv(netdev);
2721
2722         if (netif_running(netdev)) {
2723                 if (atl1c_up(adapter)) {
2724                         if (netif_msg_hw(adapter))
2725                                 dev_err(&pdev->dev,
2726                                         "Cannot bring device back up after reset\n");
2727                         return;
2728                 }
2729         }
2730
2731         netif_device_attach(netdev);
2732 }
2733
2734 static struct pci_error_handlers atl1c_err_handler = {
2735         .error_detected = atl1c_io_error_detected,
2736         .slot_reset = atl1c_io_slot_reset,
2737         .resume = atl1c_io_resume,
2738 };
2739
2740 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2741
2742 static struct pci_driver atl1c_driver = {
2743         .name     = atl1c_driver_name,
2744         .id_table = atl1c_pci_tbl,
2745         .probe    = atl1c_probe,
2746         .remove   = __devexit_p(atl1c_remove),
2747         .shutdown = atl1c_shutdown,
2748         .err_handler = &atl1c_err_handler,
2749         .driver.pm = &atl1c_pm_ops,
2750 };
2751
2752 /*
2753  * atl1c_init_module - Driver Registration Routine
2754  *
2755  * atl1c_init_module is the first routine called when the driver is
2756  * loaded. All it does is register with the PCI subsystem.
2757  */
2758 static int __init atl1c_init_module(void)
2759 {
2760         return pci_register_driver(&atl1c_driver);
2761 }
2762
2763 /*
2764  * atl1c_exit_module - Driver Exit Cleanup Routine
2765  *
2766  * atl1c_exit_module is called just before the driver is removed
2767  * from memory.
2768  */
2769 static void __exit atl1c_exit_module(void)
2770 {
2771         pci_unregister_driver(&atl1c_driver);
2772 }
2773
2774 module_init(atl1c_init_module);
2775 module_exit(atl1c_exit_module);