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
 112         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 113         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 114         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 115                 PCI_COMMAND_IO);
 116         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 117
 118         /*
 119          * Clear any PowerSaveing Settings
 120          */
 121         pci_enable_wake(pdev, PCI_D3hot, 0);
 122         pci_enable_wake(pdev, PCI_D3cold, 0);
 123
 124         /*
 125          * Mask some pcie error bits
 126          */
 127         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
 128         data &= ~PCIE_UC_SERVRITY_DLP;
 129         data &= ~PCIE_UC_SERVRITY_FCP;
 130         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
 131
 132         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 133         data &= ~LTSSM_ID_EN_WRO;
 134         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 135
 136         atl1c_pcie_patch(hw);
 137         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 138                 atl1c_disable_l0s_l1(hw);
 139         if (flag & ATL1C_PCIE_PHY_RESET)
 140                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 141         else
 142                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 143                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 144
 145         msleep(5);
 146 }
 147
 148 /*
 149  * atl1c_irq_enable - Enable default interrupt generation settings
 150  * @adapter: board private structure
 151  */
 152 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 153 {
 154         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 155                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 156                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 157                 AT_WRITE_FLUSH(&adapter->hw);
 158         }
 159 }
 160
 161 /*
 162  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 163  * @adapter: board private structure
 164  */
 165 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 166 {
 167         atomic_inc(&adapter->irq_sem);
 168         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 169         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 170         AT_WRITE_FLUSH(&adapter->hw);
 171         synchronize_irq(adapter->pdev->irq);
 172 }
 173
 174 /*
 175  * atl1c_irq_reset - reset interrupt confiure on the NIC
 176  * @adapter: board private structure
 177  */
 178 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 179 {
 180         atomic_set(&adapter->irq_sem, 1);
 181         atl1c_irq_enable(adapter);
 182 }
 183
 184 /*
 185  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 186  * of the idle status register until the device is actually idle
 187  */
 188 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
 189 {
 190         int timeout;
 191         u32 data;
 192
 193         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 194                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 195                 if ((data & IDLE_STATUS_MASK) == 0)
 196                         return 0;
 197                 msleep(1);
 198         }
 199         return data;
 200 }
 201
 202 /*
 203  * atl1c_phy_config - Timer Call-back
 204  * @data: pointer to netdev cast into an unsigned long
 205  */
 206 static void atl1c_phy_config(unsigned long data)
 207 {
 208         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 209         struct atl1c_hw *hw = &adapter->hw;
 210         unsigned long flags;
 211
 212         spin_lock_irqsave(&adapter->mdio_lock, flags);
 213         atl1c_restart_autoneg(hw);
 214         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 215 }
 216
 217 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 218 {
 219         WARN_ON(in_interrupt());
 220         atl1c_down(adapter);
 221         atl1c_up(adapter);
 222         clear_bit(__AT_RESETTING, &adapter->flags);
 223 }
 224
 225 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 226 {
 227         struct atl1c_hw *hw = &adapter->hw;
 228         struct net_device *netdev = adapter->netdev;
 229         struct pci_dev    *pdev   = adapter->pdev;
 230         int err;
 231         unsigned long flags;
 232         u16 speed, duplex, phy_data;
 233
 234         spin_lock_irqsave(&adapter->mdio_lock, flags);
 235         /* MII_BMSR must read twise */
 236         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 237         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 238         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 239
 240         if ((phy_data & BMSR_LSTATUS) == 0) {
 241                 /* link down */
 242                 hw->hibernate = true;
 243                 if (atl1c_stop_mac(hw) != 0)
 244                         if (netif_msg_hw(adapter))
 245                                 dev_warn(&pdev->dev, "stop mac failed\n");
 246                 atl1c_set_aspm(hw, false);
 247                 netif_carrier_off(netdev);
 248                 netif_stop_queue(netdev);
 249                 atl1c_phy_reset(hw);
 250                 atl1c_phy_init(&adapter->hw);
 251         } else {
 252                 /* Link Up */
 253                 hw->hibernate = false;
 254                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 255                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 256                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 257                 if (unlikely(err))
 258                         return;
 259                 /* link result is our setting */
 260                 if (adapter->link_speed != speed ||
 261                     adapter->link_duplex != duplex) {
 262                         adapter->link_speed  = speed;
 263                         adapter->link_duplex = duplex;
 264                         atl1c_set_aspm(hw, true);
 265                         atl1c_enable_tx_ctrl(hw);
 266                         atl1c_enable_rx_ctrl(hw);
 267                         atl1c_setup_mac_ctrl(adapter);
 268                         if (netif_msg_link(adapter))
 269                                 dev_info(&pdev->dev,
 270                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 271                                         atl1c_driver_name, netdev->name,
 272                                         adapter->link_speed,
 273                                         adapter->link_duplex == FULL_DUPLEX ?
 274                                         "Full Duplex" : "Half Duplex");
 275                 }
 276                 if (!netif_carrier_ok(netdev))
 277                         netif_carrier_on(netdev);
 278         }
 279 }
 280
 281 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 282 {
 283         struct net_device *netdev = adapter->netdev;
 284         struct pci_dev    *pdev   = adapter->pdev;
 285         u16 phy_data;
 286         u16 link_up;
 287
 288         spin_lock(&adapter->mdio_lock);
 289         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 290         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 291         spin_unlock(&adapter->mdio_lock);
 292         link_up = phy_data & BMSR_LSTATUS;
 293         /* notify upper layer link down ASAP */
 294         if (!link_up) {
 295                 if (netif_carrier_ok(netdev)) {
 296                         /* old link state: Up */
 297                         netif_carrier_off(netdev);
 298                         if (netif_msg_link(adapter))
 299                                 dev_info(&pdev->dev,
 300                                         "%s: %s NIC Link is Down\n",
 301                                         atl1c_driver_name, netdev->name);
 302                         adapter->link_speed = SPEED_0;
 303                 }
 304         }
 305
 306         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 307         schedule_work(&adapter->common_task);
 308 }
 309
 310 static void atl1c_common_task(struct work_struct *work)
 311 {
 312         struct atl1c_adapter *adapter;
 313         struct net_device *netdev;
 314
 315         adapter = container_of(work, struct atl1c_adapter, common_task);
 316         netdev = adapter->netdev;
 317
 318         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 319                 netif_device_detach(netdev);
 320                 atl1c_down(adapter);
 321                 atl1c_up(adapter);
 322                 netif_device_attach(netdev);
 323         }
 324
 325         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 326                 &adapter->work_event))
 327                 atl1c_check_link_status(adapter);
 328 }
 329
 330
 331 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 332 {
 333         del_timer_sync(&adapter->phy_config_timer);
 334 }
 335
 336
 337 /*
 338  * atl1c_tx_timeout - Respond to a Tx Hang
 339  * @netdev: network interface device structure
 340  */
 341 static void atl1c_tx_timeout(struct net_device *netdev)
 342 {
 343         struct atl1c_adapter *adapter = netdev_priv(netdev);
 344
 345         /* Do the reset outside of interrupt context */
 346         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 347         schedule_work(&adapter->common_task);
 348 }
 349
 350 /*
 351  * atl1c_set_multi - Multicast and Promiscuous mode set
 352  * @netdev: network interface device structure
 353  *
 354  * The set_multi entry point is called whenever the multicast address
 355  * list or the network interface flags are updated.  This routine is
 356  * responsible for configuring the hardware for proper multicast,
 357  * promiscuous mode, and all-multi behavior.
 358  */
 359 static void atl1c_set_multi(struct net_device *netdev)
 360 {
 361         struct atl1c_adapter *adapter = netdev_priv(netdev);
 362         struct atl1c_hw *hw = &adapter->hw;
 363         struct netdev_hw_addr *ha;
 364         u32 mac_ctrl_data;
 365         u32 hash_value;
 366
 367         /* Check for Promiscuous and All Multicast modes */
 368         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 369
 370         if (netdev->flags & IFF_PROMISC) {
 371                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 372         } else if (netdev->flags & IFF_ALLMULTI) {
 373                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 374                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 375         } else {
 376                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 377         }
 378
 379         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 380
 381         /* clear the old settings from the multicast hash table */
 382         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 383         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 384
 385         /* comoute mc addresses' hash value ,and put it into hash table */
 386         netdev_for_each_mc_addr(ha, netdev) {
 387                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 388                 atl1c_hash_set(hw, hash_value);
 389         }
 390 }
 391
 392 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 393 {
 394         if (features & NETIF_F_HW_VLAN_RX) {
 395                 /* enable VLAN tag insert/strip */
 396                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 397         } else {
 398                 /* disable VLAN tag insert/strip */
 399                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 400         }
 401 }
 402
 403 static void atl1c_vlan_mode(struct net_device *netdev,
 404         netdev_features_t features)
 405 {
 406         struct atl1c_adapter *adapter = netdev_priv(netdev);
 407         struct pci_dev *pdev = adapter->pdev;
 408         u32 mac_ctrl_data = 0;
 409
 410         if (netif_msg_pktdata(adapter))
 411                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 412
 413         atl1c_irq_disable(adapter);
 414         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 415         __atl1c_vlan_mode(features, &mac_ctrl_data);
 416         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 417         atl1c_irq_enable(adapter);
 418 }
 419
 420 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 421 {
 422         struct pci_dev *pdev = adapter->pdev;
 423
 424         if (netif_msg_pktdata(adapter))
 425                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 426         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 427 }
 428
 429 /*
 430  * atl1c_set_mac - Change the Ethernet Address of the NIC
 431  * @netdev: network interface device structure
 432  * @p: pointer to an address structure
 433  *
 434  * Returns 0 on success, negative on failure
 435  */
 436 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 437 {
 438         struct atl1c_adapter *adapter = netdev_priv(netdev);
 439         struct sockaddr *addr = p;
 440
 441         if (!is_valid_ether_addr(addr->sa_data))
 442                 return -EADDRNOTAVAIL;
 443
 444         if (netif_running(netdev))
 445                 return -EBUSY;
 446
 447         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 448         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 449         netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
 450
 451         atl1c_hw_set_mac_addr(&adapter->hw);
 452
 453         return 0;
 454 }
 455
 456 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 457                                 struct net_device *dev)
 458 {
 459         int mtu = dev->mtu;
 460
 461         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 462                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 463 }
 464
 465 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 466         netdev_features_t features)
 467 {
 468         /*
 469          * Since there is no support for separate rx/tx vlan accel
 470          * enable/disable make sure tx flag is always in same state as rx.
 471          */
 472         if (features & NETIF_F_HW_VLAN_RX)
 473                 features |= NETIF_F_HW_VLAN_TX;
 474         else
 475                 features &= ~NETIF_F_HW_VLAN_TX;
 476
 477         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 478                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 479
 480         return features;
 481 }
 482
 483 static int atl1c_set_features(struct net_device *netdev,
 484         netdev_features_t features)
 485 {
 486         netdev_features_t changed = netdev->features ^ features;
 487
 488         if (changed & NETIF_F_HW_VLAN_RX)
 489                 atl1c_vlan_mode(netdev, features);
 490
 491         return 0;
 492 }
 493
 494 /*
 495  * atl1c_change_mtu - Change the Maximum Transfer Unit
 496  * @netdev: network interface device structure
 497  * @new_mtu: new value for maximum frame size
 498  *
 499  * Returns 0 on success, negative on failure
 500  */
 501 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 502 {
 503         struct atl1c_adapter *adapter = netdev_priv(netdev);
 504         int old_mtu   = netdev->mtu;
 505         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 506
 507         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 508                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 509                 if (netif_msg_link(adapter))
 510                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 511                 return -EINVAL;
 512         }
 513         /* set MTU */
 514         if (old_mtu != new_mtu && netif_running(netdev)) {
 515                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 516                         msleep(1);
 517                 netdev->mtu = new_mtu;
 518                 adapter->hw.max_frame_size = new_mtu;
 519                 atl1c_set_rxbufsize(adapter, netdev);
 520                 atl1c_down(adapter);
 521                 netdev_update_features(netdev);
 522                 atl1c_up(adapter);
 523                 clear_bit(__AT_RESETTING, &adapter->flags);
 524                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 525                         u32 phy_data;
 526
 527                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 528                         phy_data |= 0x10000000;
 529                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 530                 }
 531
 532         }
 533         return 0;
 534 }
 535
 536 /*
 537  *  caller should hold mdio_lock
 538  */
 539 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 540 {
 541         struct atl1c_adapter *adapter = netdev_priv(netdev);
 542         u16 result;
 543
 544         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 545         return result;
 546 }
 547
 548 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 549                              int reg_num, int val)
 550 {
 551         struct atl1c_adapter *adapter = netdev_priv(netdev);
 552
 553         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 554 }
 555
 556 /*
 557  * atl1c_mii_ioctl -
 558  * @netdev:
 559  * @ifreq:
 560  * @cmd:
 561  */
 562 static int atl1c_mii_ioctl(struct net_device *netdev,
 563                            struct ifreq *ifr, int cmd)
 564 {
 565         struct atl1c_adapter *adapter = netdev_priv(netdev);
 566         struct pci_dev *pdev = adapter->pdev;
 567         struct mii_ioctl_data *data = if_mii(ifr);
 568         unsigned long flags;
 569         int retval = 0;
 570
 571         if (!netif_running(netdev))
 572                 return -EINVAL;
 573
 574         spin_lock_irqsave(&adapter->mdio_lock, flags);
 575         switch (cmd) {
 576         case SIOCGMIIPHY:
 577                 data->phy_id = 0;
 578                 break;
 579
 580         case SIOCGMIIREG:
 581                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 582                                     &data->val_out)) {
 583                         retval = -EIO;
 584                         goto out;
 585                 }
 586                 break;
 587
 588         case SIOCSMIIREG:
 589                 if (data->reg_num & ~(0x1F)) {
 590                         retval = -EFAULT;
 591                         goto out;
 592                 }
 593
 594                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 595                                 data->reg_num, data->val_in);
 596                 if (atl1c_write_phy_reg(&adapter->hw,
 597                                      data->reg_num, data->val_in)) {
 598                         retval = -EIO;
 599                         goto out;
 600                 }
 601                 break;
 602
 603         default:
 604                 retval = -EOPNOTSUPP;
 605                 break;
 606         }
 607 out:
 608         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 609         return retval;
 610 }
 611
 612 /*
 613  * atl1c_ioctl -
 614  * @netdev:
 615  * @ifreq:
 616  * @cmd:
 617  */
 618 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 619 {
 620         switch (cmd) {
 621         case SIOCGMIIPHY:
 622         case SIOCGMIIREG:
 623         case SIOCSMIIREG:
 624                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 625         default:
 626                 return -EOPNOTSUPP;
 627         }
 628 }
 629
 630 /*
 631  * atl1c_alloc_queues - Allocate memory for all rings
 632  * @adapter: board private structure to initialize
 633  *
 634  */
 635 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 636 {
 637         return 0;
 638 }
 639
 640 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 641 {
 642         switch (hw->device_id) {
 643         case PCI_DEVICE_ID_ATTANSIC_L2C:
 644                 hw->nic_type = athr_l2c;
 645                 break;
 646         case PCI_DEVICE_ID_ATTANSIC_L1C:
 647                 hw->nic_type = athr_l1c;
 648                 break;
 649         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 650                 hw->nic_type = athr_l2c_b;
 651                 break;
 652         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 653                 hw->nic_type = athr_l2c_b2;
 654                 break;
 655         case PCI_DEVICE_ID_ATHEROS_L1D:
 656                 hw->nic_type = athr_l1d;
 657                 break;
 658         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 659                 hw->nic_type = athr_l1d_2;
 660                 break;
 661         default:
 662                 break;
 663         }
 664 }
 665
 666 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 667 {
 668         u32 phy_status_data;
 669         u32 link_ctrl_data;
 670
 671         atl1c_set_mac_type(hw);
 672         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 673         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 674
 675         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 676                          ATL1C_TXQ_MODE_ENHANCE;
 677         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 678                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 679         if (link_ctrl_data & LINK_CTRL_L1_EN)
 680                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 681         if (link_ctrl_data & LINK_CTRL_EXT_SYNC)
 682                 hw->ctrl_flags |= ATL1C_LINK_EXT_SYNC;
 683         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 684
 685         if (hw->nic_type == athr_l1c ||
 686             hw->nic_type == athr_l1d ||
 687             hw->nic_type == athr_l1d_2)
 688                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 689         return 0;
 690 }
 691 /*
 692  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 693  * @adapter: board private structure to initialize
 694  *
 695  * atl1c_sw_init initializes the Adapter private data structure.
 696  * Fields are initialized based on PCI device information and
 697  * OS network device settings (MTU size).
 698  */
 699 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 700 {
 701         struct atl1c_hw *hw   = &adapter->hw;
 702         struct pci_dev  *pdev = adapter->pdev;
 703         u32 revision;
 704
 705
 706         adapter->wol = 0;
 707         device_set_wakeup_enable(&pdev->dev, false);
 708         adapter->link_speed = SPEED_0;
 709         adapter->link_duplex = FULL_DUPLEX;
 710         adapter->tpd_ring[0].count = 1024;
 711         adapter->rfd_ring.count = 512;
 712
 713         hw->vendor_id = pdev->vendor;
 714         hw->device_id = pdev->device;
 715         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 716         hw->subsystem_id = pdev->subsystem_device;
 717         AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
 718         hw->revision_id = revision & 0xFF;
 719         /* before link up, we assume hibernate is true */
 720         hw->hibernate = true;
 721         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 722         if (atl1c_setup_mac_funcs(hw) != 0) {
 723                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 724                 return -1;
 725         }
 726         hw->intr_mask = IMR_NORMAL_MASK;
 727         hw->phy_configured = false;
 728         hw->preamble_len = 7;
 729         hw->max_frame_size = adapter->netdev->mtu;
 730         hw->autoneg_advertised = ADVERTISED_Autoneg;
 731         hw->indirect_tab = 0xE4E4E4E4;
 732         hw->base_cpu = 0;
 733
 734         hw->ict = 50000;                /* 100ms */
 735         hw->smb_timer = 200000;         /* 400ms */
 736         hw->cmb_tpd = 4;
 737         hw->cmb_tx_timer = 1;           /* 2 us  */
 738         hw->rx_imt = 200;
 739         hw->tx_imt = 1000;
 740
 741         hw->tpd_burst = 5;
 742         hw->rfd_burst = 8;
 743         hw->dma_order = atl1c_dma_ord_out;
 744         hw->dmar_block = atl1c_dma_req_1024;
 745         hw->dmaw_block = atl1c_dma_req_1024;
 746         hw->dmar_dly_cnt = 15;
 747         hw->dmaw_dly_cnt = 4;
 748
 749         if (atl1c_alloc_queues(adapter)) {
 750                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 751                 return -ENOMEM;
 752         }
 753         /* TODO */
 754         atl1c_set_rxbufsize(adapter, adapter->netdev);
 755         atomic_set(&adapter->irq_sem, 1);
 756         spin_lock_init(&adapter->mdio_lock);
 757         spin_lock_init(&adapter->tx_lock);
 758         set_bit(__AT_DOWN, &adapter->flags);
 759
 760         return 0;
 761 }
 762
 763 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 764                                 struct atl1c_buffer *buffer_info, int in_irq)
 765 {
 766         u16 pci_driection;
 767         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 768                 return;
 769         if (buffer_info->dma) {
 770                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 771                         pci_driection = PCI_DMA_FROMDEVICE;
 772                 else
 773                         pci_driection = PCI_DMA_TODEVICE;
 774
 775                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 776                         pci_unmap_single(pdev, buffer_info->dma,
 777                                         buffer_info->length, pci_driection);
 778                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 779                         pci_unmap_page(pdev, buffer_info->dma,
 780                                         buffer_info->length, pci_driection);
 781         }
 782         if (buffer_info->skb) {
 783                 if (in_irq)
 784                         dev_kfree_skb_irq(buffer_info->skb);
 785                 else
 786                         dev_kfree_skb(buffer_info->skb);
 787         }
 788         buffer_info->dma = 0;
 789         buffer_info->skb = NULL;
 790         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 791 }
 792 /*
 793  * atl1c_clean_tx_ring - Free Tx-skb
 794  * @adapter: board private structure
 795  */
 796 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 797                                 enum atl1c_trans_queue type)
 798 {
 799         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 800         struct atl1c_buffer *buffer_info;
 801         struct pci_dev *pdev = adapter->pdev;
 802         u16 index, ring_count;
 803
 804         ring_count = tpd_ring->count;
 805         for (index = 0; index < ring_count; index++) {
 806                 buffer_info = &tpd_ring->buffer_info[index];
 807                 atl1c_clean_buffer(pdev, buffer_info, 0);
 808         }
 809
 810         /* Zero out Tx-buffers */
 811         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 812                 ring_count);
 813         atomic_set(&tpd_ring->next_to_clean, 0);
 814         tpd_ring->next_to_use = 0;
 815 }
 816
 817 /*
 818  * atl1c_clean_rx_ring - Free rx-reservation skbs
 819  * @adapter: board private structure
 820  */
 821 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 822 {
 823         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 824         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 825         struct atl1c_buffer *buffer_info;
 826         struct pci_dev *pdev = adapter->pdev;
 827         int j;
 828
 829         for (j = 0; j < rfd_ring->count; j++) {
 830                 buffer_info = &rfd_ring->buffer_info[j];
 831                 atl1c_clean_buffer(pdev, buffer_info, 0);
 832         }
 833         /* zero out the descriptor ring */
 834         memset(rfd_ring->desc, 0, rfd_ring->size);
 835         rfd_ring->next_to_clean = 0;
 836         rfd_ring->next_to_use = 0;
 837         rrd_ring->next_to_use = 0;
 838         rrd_ring->next_to_clean = 0;
 839 }
 840
 841 /*
 842  * Read / Write Ptr Initialize:
 843  */
 844 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 845 {
 846         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 847         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 848         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 849         struct atl1c_buffer *buffer_info;
 850         int i, j;
 851
 852         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 853                 tpd_ring[i].next_to_use = 0;
 854                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 855                 buffer_info = tpd_ring[i].buffer_info;
 856                 for (j = 0; j < tpd_ring->count; j++)
 857                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 858                                         ATL1C_BUFFER_FREE);
 859         }
 860         rfd_ring->next_to_use = 0;
 861         rfd_ring->next_to_clean = 0;
 862         rrd_ring->next_to_use = 0;
 863         rrd_ring->next_to_clean = 0;
 864         for (j = 0; j < rfd_ring->count; j++) {
 865                 buffer_info = &rfd_ring->buffer_info[j];
 866                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 867         }
 868 }
 869
 870 /*
 871  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 872  * @adapter: board private structure
 873  *
 874  * Free all transmit software resources
 875  */
 876 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 877 {
 878         struct pci_dev *pdev = adapter->pdev;
 879
 880         pci_free_consistent(pdev, adapter->ring_header.size,
 881                                         adapter->ring_header.desc,
 882                                         adapter->ring_header.dma);
 883         adapter->ring_header.desc = NULL;
 884
 885         /* Note: just free tdp_ring.buffer_info,
 886         *  it contain rfd_ring.buffer_info, do not double free */
 887         if (adapter->tpd_ring[0].buffer_info) {
 888                 kfree(adapter->tpd_ring[0].buffer_info);
 889                 adapter->tpd_ring[0].buffer_info = NULL;
 890         }
 891 }
 892
 893 /*
 894  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 895  * @adapter: board private structure
 896  *
 897  * Return 0 on success, negative on failure
 898  */
 899 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 900 {
 901         struct pci_dev *pdev = adapter->pdev;
 902         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 903         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 904         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 905         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 906         int size;
 907         int i;
 908         int count = 0;
 909         int rx_desc_count = 0;
 910         u32 offset = 0;
 911
 912         rrd_ring->count = rfd_ring->count;
 913         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 914                 tpd_ring[i].count = tpd_ring[0].count;
 915
 916         /* 2 tpd queue, one high priority queue,
 917          * another normal priority queue */
 918         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 919                 rfd_ring->count);
 920         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 921         if (unlikely(!tpd_ring->buffer_info)) {
 922                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 923                         size);
 924                 goto err_nomem;
 925         }
 926         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 927                 tpd_ring[i].buffer_info =
 928                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 929                 count += tpd_ring[i].count;
 930         }
 931
 932         rfd_ring->buffer_info =
 933                 (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 934         count += rfd_ring->count;
 935         rx_desc_count += rfd_ring->count;
 936
 937         /*
 938          * real ring DMA buffer
 939          * each ring/block may need up to 8 bytes for alignment, hence the
 940          * additional bytes tacked onto the end.
 941          */
 942         ring_header->size = size =
 943                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 944                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 945                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 946                 sizeof(struct atl1c_hw_stats) +
 947                 8 * 4 + 8 * 2;
 948
 949         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 950                                 &ring_header->dma);
 951         if (unlikely(!ring_header->desc)) {
 952                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 953                 goto err_nomem;
 954         }
 955         memset(ring_header->desc, 0, ring_header->size);
 956         /* init TPD ring */
 957
 958         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 959         offset = tpd_ring[0].dma - ring_header->dma;
 960         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 961                 tpd_ring[i].dma = ring_header->dma + offset;
 962                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 963                 tpd_ring[i].size =
 964                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 965                 offset += roundup(tpd_ring[i].size, 8);
 966         }
 967         /* init RFD ring */
 968         rfd_ring->dma = ring_header->dma + offset;
 969         rfd_ring->desc = (u8 *) ring_header->desc + offset;
 970         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
 971         offset += roundup(rfd_ring->size, 8);
 972
 973         /* init RRD ring */
 974         rrd_ring->dma = ring_header->dma + offset;
 975         rrd_ring->desc = (u8 *) ring_header->desc + offset;
 976         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
 977                 rrd_ring->count;
 978         offset += roundup(rrd_ring->size, 8);
 979
 980         adapter->smb.dma = ring_header->dma + offset;
 981         adapter->smb.smb = (u8 *)ring_header->desc + offset;
 982         return 0;
 983
 984 err_nomem:
 985         kfree(tpd_ring->buffer_info);
 986         return -ENOMEM;
 987 }
 988
 989 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
 990 {
 991         struct atl1c_hw *hw = &adapter->hw;
 992         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 993         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 994         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
 995                                 adapter->tpd_ring;
 996         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
 997         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
 998         u32 data;
 999
1000         /* TPD */
1001         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1002                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1003                                 AT_DMA_HI_ADDR_MASK) >> 32));
1004         /* just enable normal priority TX queue */
1005         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
1006                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1007                                 AT_DMA_LO_ADDR_MASK));
1008         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
1009                         (u32)(tpd_ring[atl1c_trans_high].dma &
1010                                 AT_DMA_LO_ADDR_MASK));
1011         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1012                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1013
1014
1015         /* RFD */
1016         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1017                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1018         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1019                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1020
1021         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1022                         rfd_ring->count & RFD_RING_SIZE_MASK);
1023         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1024                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1025
1026         /* RRD */
1027         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1028                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1029         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1030                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1031
1032         /* CMB */
1033         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
1034
1035         /* SMB */
1036         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
1037                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1038         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
1039                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
1040         if (hw->nic_type == athr_l2c_b) {
1041                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1042                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1043                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1044                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1045                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1046                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1047                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1048                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1049         }
1050         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d_2) {
1051                         /* Power Saving for L2c_B */
1052                 AT_READ_REG(hw, REG_SERDES_LOCK, &data);
1053                 data |= SERDES_MAC_CLK_SLOWDOWN;
1054                 data |= SERDES_PYH_CLK_SLOWDOWN;
1055                 AT_WRITE_REG(hw, REG_SERDES_LOCK, data);
1056         }
1057         /* Load all of base address above */
1058         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1059 }
1060
1061 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1062 {
1063         struct atl1c_hw *hw = &adapter->hw;
1064         u32 dev_ctrl_data;
1065         u32 max_pay_load;
1066         u16 tx_offload_thresh;
1067         u32 txq_ctrl_data;
1068         u32 max_pay_load_data;
1069
1070         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1071         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1072                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1073         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1074         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1075                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1076         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
1077         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1078                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1079         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1080
1081         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1082                         TXQ_NUM_TPD_BURST_SHIFT;
1083         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1084                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1085         max_pay_load_data = (atl1c_pay_load_size[hw->dmar_block] &
1086                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1087         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2)
1088                 max_pay_load_data >>= 1;
1089         txq_ctrl_data |= max_pay_load_data;
1090
1091         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1092 }
1093
1094 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1095 {
1096         struct atl1c_hw *hw = &adapter->hw;
1097         u32 rxq_ctrl_data;
1098
1099         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1100                         RXQ_RFD_BURST_NUM_SHIFT;
1101
1102         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1103                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1104
1105         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1106                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_1M &
1107                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1108
1109         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1110 }
1111
1112 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1113 {
1114         struct atl1c_hw *hw = &adapter->hw;
1115         u32 dma_ctrl_data;
1116
1117         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1118         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1119                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1120         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1121                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1122         else
1123                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1124
1125         switch (hw->dma_order) {
1126         case atl1c_dma_ord_in:
1127                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1128                 break;
1129         case atl1c_dma_ord_enh:
1130                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1131                 break;
1132         case atl1c_dma_ord_out:
1133                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1134                 break;
1135         default:
1136                 break;
1137         }
1138
1139         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1140                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1141         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1142                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1143         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1144                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1145         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1146                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1147
1148         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1149 }
1150
1151 /*
1152  * Stop the mac, transmit and receive units
1153  * hw - Struct containing variables accessed by shared code
1154  * return : 0  or  idle status (if error)
1155  */
1156 static int atl1c_stop_mac(struct atl1c_hw *hw)
1157 {
1158         u32 data;
1159
1160         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1161         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1162                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1163         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1164
1165         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1166         data &= ~TXQ_CTRL_EN;
1167         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1168
1169         atl1c_wait_until_idle(hw);
1170
1171         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1172         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1173         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1174
1175         return (int)atl1c_wait_until_idle(hw);
1176 }
1177
1178 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1179 {
1180         u32 data;
1181
1182         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1183         data |= RXQ_CTRL_EN;
1184         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1185 }
1186
1187 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1188 {
1189         u32 data;
1190
1191         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1192         data |= TXQ_CTRL_EN;
1193         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1194 }
1195
1196 /*
1197  * Reset the transmit and receive units; mask and clear all interrupts.
1198  * hw - Struct containing variables accessed by shared code
1199  * return : 0  or  idle status (if error)
1200  */
1201 static int atl1c_reset_mac(struct atl1c_hw *hw)
1202 {
1203         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1204         struct pci_dev *pdev = adapter->pdev;
1205         u32 master_ctrl_data = 0;
1206
1207         AT_WRITE_REG(hw, REG_IMR, 0);
1208         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1209
1210         atl1c_stop_mac(hw);
1211         /*
1212          * Issue Soft Reset to the MAC.  This will reset the chip's
1213          * transmit, receive, DMA.  It will not effect
1214          * the current PCI configuration.  The global reset bit is self-
1215          * clearing, and should clear within a microsecond.
1216          */
1217         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1218         master_ctrl_data |= MASTER_CTRL_OOB_DIS_OFF;
1219         AT_WRITE_REGW(hw, REG_MASTER_CTRL, ((master_ctrl_data | MASTER_CTRL_SOFT_RST)
1220                         & 0xFFFF));
1221
1222         AT_WRITE_FLUSH(hw);
1223         msleep(10);
1224         /* Wait at least 10ms for All module to be Idle */
1225
1226         if (atl1c_wait_until_idle(hw)) {
1227                 dev_err(&pdev->dev,
1228                         "MAC state machine can't be idle since"
1229                         " disabled for 10ms second\n");
1230                 return -1;
1231         }
1232         return 0;
1233 }
1234
1235 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1236 {
1237         u32 pm_ctrl_data;
1238
1239         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1240         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1241                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1242         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1243         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1244         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1245         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1246         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1247
1248         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1249         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1250         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1251         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1252 }
1253
1254 /*
1255  * Set ASPM state.
1256  * Enable/disable L0s/L1 depend on link state.
1257  */
1258 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1259 {
1260         u32 pm_ctrl_data;
1261         u32 link_ctrl_data;
1262         u32 link_l1_timer = 0xF;
1263
1264         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1265         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
1266
1267         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1268         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1269                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1270         pm_ctrl_data &= ~(PM_CTRL_LCKDET_TIMER_MASK <<
1271                         PM_CTRL_LCKDET_TIMER_SHIFT);
1272         pm_ctrl_data |= AT_LCKDET_TIMER << PM_CTRL_LCKDET_TIMER_SHIFT;
1273
1274         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1275                 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1276                 link_ctrl_data &= ~LINK_CTRL_EXT_SYNC;
1277                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE)) {
1278                         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10)
1279                                 link_ctrl_data |= LINK_CTRL_EXT_SYNC;
1280                 }
1281
1282                 AT_WRITE_REG(hw, REG_LINK_CTRL, link_ctrl_data);
1283
1284                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER;
1285                 pm_ctrl_data &= ~(PM_CTRL_PM_REQ_TIMER_MASK <<
1286                         PM_CTRL_PM_REQ_TIMER_SHIFT);
1287                 pm_ctrl_data |= AT_ASPM_L1_TIMER <<
1288                         PM_CTRL_PM_REQ_TIMER_SHIFT;
1289                 pm_ctrl_data &= ~PM_CTRL_SA_DLY_EN;
1290                 pm_ctrl_data &= ~PM_CTRL_HOTRST;
1291                 pm_ctrl_data |= 1 << PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1292                 pm_ctrl_data |= PM_CTRL_SERDES_PD_EX_L1;
1293         }
1294         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1295         if (linkup) {
1296                 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1297                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1298                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1299                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1300                 if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1301                         pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN;
1302
1303                 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1304                         hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1305                         if (hw->nic_type == athr_l2c_b)
1306                                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE))
1307                                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1308                         pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1309                         pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1310                         pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1311                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1312                 if (hw->adapter->link_speed == SPEED_100 ||
1313                                 hw->adapter->link_speed == SPEED_1000) {
1314                                 pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1315                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1316                                 if (hw->nic_type == athr_l2c_b)
1317                                         link_l1_timer = 7;
1318                                 else if (hw->nic_type == athr_l2c_b2 ||
1319                                         hw->nic_type == athr_l1d_2)
1320                                         link_l1_timer = 4;
1321                                 pm_ctrl_data |= link_l1_timer <<
1322                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1323                         }
1324                 } else {
1325                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1326                         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1327                         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1328                         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1329                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1330                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1331
1332                 }
1333         } else {
1334                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1335                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1336                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1337                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1338
1339                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1340                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1341                 else
1342                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1343         }
1344         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1345
1346         return;
1347 }
1348
1349 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1350 {
1351         struct atl1c_hw *hw = &adapter->hw;
1352         struct net_device *netdev = adapter->netdev;
1353         u32 mac_ctrl_data;
1354
1355         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1356         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1357
1358         if (adapter->link_duplex == FULL_DUPLEX) {
1359                 hw->mac_duplex = true;
1360                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1361         }
1362
1363         if (adapter->link_speed == SPEED_1000)
1364                 hw->mac_speed = atl1c_mac_speed_1000;
1365         else
1366                 hw->mac_speed = atl1c_mac_speed_10_100;
1367
1368         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1369                         MAC_CTRL_SPEED_SHIFT;
1370
1371         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1372         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1373                         MAC_CTRL_PRMLEN_SHIFT);
1374
1375         __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
1376
1377         mac_ctrl_data |= MAC_CTRL_BC_EN;
1378         if (netdev->flags & IFF_PROMISC)
1379                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1380         if (netdev->flags & IFF_ALLMULTI)
1381                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1382
1383         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1384         if (hw->nic_type == athr_l1d || hw->nic_type == athr_l2c_b2 ||
1385             hw->nic_type == athr_l1d_2) {
1386                 mac_ctrl_data |= MAC_CTRL_SPEED_MODE_SW;
1387                 mac_ctrl_data |= MAC_CTRL_HASH_ALG_CRC32;
1388         }
1389         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1390 }
1391
1392 /*
1393  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1394  * @adapter: board private structure
1395  *
1396  * Configure the Tx /Rx unit of the MAC after a reset.
1397  */
1398 static int atl1c_configure(struct atl1c_adapter *adapter)
1399 {
1400         struct atl1c_hw *hw = &adapter->hw;
1401         u32 master_ctrl_data = 0;
1402         u32 intr_modrt_data;
1403         u32 data;
1404
1405         /* clear interrupt status */
1406         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1407         /*  Clear any WOL status */
1408         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1409         /* set Interrupt Clear Timer
1410          * HW will enable self to assert interrupt event to system after
1411          * waiting x-time for software to notify it accept interrupt.
1412          */
1413
1414         data = CLK_GATING_EN_ALL;
1415         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1416                 if (hw->nic_type == athr_l2c_b)
1417                         data &= ~CLK_GATING_RXMAC_EN;
1418         } else
1419                 data = 0;
1420         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1421
1422         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1423                 hw->ict & INT_RETRIG_TIMER_MASK);
1424
1425         atl1c_configure_des_ring(adapter);
1426
1427         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1428                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1429                                         IRQ_MODRT_TX_TIMER_SHIFT;
1430                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1431                                         IRQ_MODRT_RX_TIMER_SHIFT;
1432                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1433                 master_ctrl_data |=
1434                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1435         }
1436
1437         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1438                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1439
1440         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1441         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1442
1443         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1444                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1445                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1446                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1447                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1448         }
1449
1450         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1451                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1452                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1453         /* set MTU */
1454         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1455                         VLAN_HLEN + ETH_FCS_LEN);
1456         /* HDS, disable */
1457         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1458
1459         atl1c_configure_tx(adapter);
1460         atl1c_configure_rx(adapter);
1461         atl1c_configure_dma(adapter);
1462
1463         return 0;
1464 }
1465
1466 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1467 {
1468         u16 hw_reg_addr = 0;
1469         unsigned long *stats_item = NULL;
1470         u32 data;
1471
1472         /* update rx status */
1473         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1474         stats_item  = &adapter->hw_stats.rx_ok;
1475         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1476                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1477                 *stats_item += data;
1478                 stats_item++;
1479                 hw_reg_addr += 4;
1480         }
1481 /* update tx status */
1482         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1483         stats_item  = &adapter->hw_stats.tx_ok;
1484         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1485                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1486                 *stats_item += data;
1487                 stats_item++;
1488                 hw_reg_addr += 4;
1489         }
1490 }
1491
1492 /*
1493  * atl1c_get_stats - Get System Network Statistics
1494  * @netdev: network interface device structure
1495  *
1496  * Returns the address of the device statistics structure.
1497  * The statistics are actually updated from the timer callback.
1498  */
1499 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1500 {
1501         struct atl1c_adapter *adapter = netdev_priv(netdev);
1502         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1503         struct net_device_stats *net_stats = &netdev->stats;
1504
1505         atl1c_update_hw_stats(adapter);
1506         net_stats->rx_packets = hw_stats->rx_ok;
1507         net_stats->tx_packets = hw_stats->tx_ok;
1508         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1509         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1510         net_stats->multicast  = hw_stats->rx_mcast;
1511         net_stats->collisions = hw_stats->tx_1_col +
1512                                 hw_stats->tx_2_col * 2 +
1513                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1514         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1515                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1516                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1517         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1518         net_stats->rx_length_errors = hw_stats->rx_len_err;
1519         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1520         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1521         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1522
1523         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1524
1525         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1526                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1527         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1528         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1529         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1530
1531         return net_stats;
1532 }
1533
1534 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1535 {
1536         u16 phy_data;
1537
1538         spin_lock(&adapter->mdio_lock);
1539         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1540         spin_unlock(&adapter->mdio_lock);
1541 }
1542
1543 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1544                                 enum atl1c_trans_queue type)
1545 {
1546         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1547                                 &adapter->tpd_ring[type];
1548         struct atl1c_buffer *buffer_info;
1549         struct pci_dev *pdev = adapter->pdev;
1550         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1551         u16 hw_next_to_clean;
1552         u16 shift;
1553         u32 data;
1554
1555         if (type == atl1c_trans_high)
1556                 shift = MB_HTPD_CONS_IDX_SHIFT;
1557         else
1558                 shift = MB_NTPD_CONS_IDX_SHIFT;
1559
1560         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1561         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1562
1563         while (next_to_clean != hw_next_to_clean) {
1564                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1565                 atl1c_clean_buffer(pdev, buffer_info, 1);
1566                 if (++next_to_clean == tpd_ring->count)
1567                         next_to_clean = 0;
1568                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1569         }
1570
1571         if (netif_queue_stopped(adapter->netdev) &&
1572                         netif_carrier_ok(adapter->netdev)) {
1573                 netif_wake_queue(adapter->netdev);
1574         }
1575
1576         return true;
1577 }
1578
1579 /*
1580  * atl1c_intr - Interrupt Handler
1581  * @irq: interrupt number
1582  * @data: pointer to a network interface device structure
1583  * @pt_regs: CPU registers structure
1584  */
1585 static irqreturn_t atl1c_intr(int irq, void *data)
1586 {
1587         struct net_device *netdev  = data;
1588         struct atl1c_adapter *adapter = netdev_priv(netdev);
1589         struct pci_dev *pdev = adapter->pdev;
1590         struct atl1c_hw *hw = &adapter->hw;
1591         int max_ints = AT_MAX_INT_WORK;
1592         int handled = IRQ_NONE;
1593         u32 status;
1594         u32 reg_data;
1595
1596         do {
1597                 AT_READ_REG(hw, REG_ISR, &reg_data);
1598                 status = reg_data & hw->intr_mask;
1599
1600                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1601                         if (max_ints != AT_MAX_INT_WORK)
1602                                 handled = IRQ_HANDLED;
1603                         break;
1604                 }
1605                 /* link event */
1606                 if (status & ISR_GPHY)
1607                         atl1c_clear_phy_int(adapter);
1608                 /* Ack ISR */
1609                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1610                 if (status & ISR_RX_PKT) {
1611                         if (likely(napi_schedule_prep(&adapter->napi))) {
1612                                 hw->intr_mask &= ~ISR_RX_PKT;
1613                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1614                                 __napi_schedule(&adapter->napi);
1615                         }
1616                 }
1617                 if (status & ISR_TX_PKT)
1618                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1619
1620                 handled = IRQ_HANDLED;
1621                 /* check if PCIE PHY Link down */
1622                 if (status & ISR_ERROR) {
1623                         if (netif_msg_hw(adapter))
1624                                 dev_err(&pdev->dev,
1625                                         "atl1c hardware error (status = 0x%x)\n",
1626                                         status & ISR_ERROR);
1627                         /* reset MAC */
1628                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1629                         schedule_work(&adapter->common_task);
1630                         return IRQ_HANDLED;
1631                 }
1632
1633                 if (status & ISR_OVER)
1634                         if (netif_msg_intr(adapter))
1635                                 dev_warn(&pdev->dev,
1636                                         "TX/RX overflow (status = 0x%x)\n",
1637                                         status & ISR_OVER);
1638
1639                 /* link event */
1640                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1641                         netdev->stats.tx_carrier_errors++;
1642                         atl1c_link_chg_event(adapter);
1643                         break;
1644                 }
1645
1646         } while (--max_ints > 0);
1647         /* re-enable Interrupt*/
1648         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1649         return handled;
1650 }
1651
1652 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1653                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1654 {
1655         /*
1656          * The pid field in RRS in not correct sometimes, so we
1657          * cannot figure out if the packet is fragmented or not,
1658          * so we tell the KERNEL CHECKSUM_NONE
1659          */
1660         skb_checksum_none_assert(skb);
1661 }
1662
1663 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1664 {
1665         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1666         struct pci_dev *pdev = adapter->pdev;
1667         struct atl1c_buffer *buffer_info, *next_info;
1668         struct sk_buff *skb;
1669         void *vir_addr = NULL;
1670         u16 num_alloc = 0;
1671         u16 rfd_next_to_use, next_next;
1672         struct atl1c_rx_free_desc *rfd_desc;
1673
1674         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1675         if (++next_next == rfd_ring->count)
1676                 next_next = 0;
1677         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1678         next_info = &rfd_ring->buffer_info[next_next];
1679
1680         while (next_info->flags & ATL1C_BUFFER_FREE) {
1681                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1682
1683                 skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len);
1684                 if (unlikely(!skb)) {
1685                         if (netif_msg_rx_err(adapter))
1686                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1687                         break;
1688                 }
1689
1690                 /*
1691                  * Make buffer alignment 2 beyond a 16 byte boundary
1692                  * this will result in a 16 byte aligned IP header after
1693                  * the 14 byte MAC header is removed
1694                  */
1695                 vir_addr = skb->data;
1696                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1697                 buffer_info->skb = skb;
1698                 buffer_info->length = adapter->rx_buffer_len;
1699                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1700                                                 buffer_info->length,
1701                                                 PCI_DMA_FROMDEVICE);
1702                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1703                         ATL1C_PCIMAP_FROMDEVICE);
1704                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1705                 rfd_next_to_use = next_next;
1706                 if (++next_next == rfd_ring->count)
1707                         next_next = 0;
1708                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1709                 next_info = &rfd_ring->buffer_info[next_next];
1710                 num_alloc++;
1711         }
1712
1713         if (num_alloc) {
1714                 /* TODO: update mailbox here */
1715                 wmb();
1716                 rfd_ring->next_to_use = rfd_next_to_use;
1717                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1718                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1719         }
1720
1721         return num_alloc;
1722 }
1723
1724 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1725                         struct  atl1c_recv_ret_status *rrs, u16 num)
1726 {
1727         u16 i;
1728         /* the relationship between rrd and rfd is one map one */
1729         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1730                                         rrd_ring->next_to_clean)) {
1731                 rrs->word3 &= ~RRS_RXD_UPDATED;
1732                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1733                         rrd_ring->next_to_clean = 0;
1734         }
1735 }
1736
1737 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1738         struct atl1c_recv_ret_status *rrs, u16 num)
1739 {
1740         u16 i;
1741         u16 rfd_index;
1742         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1743
1744         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1745                         RRS_RX_RFD_INDEX_MASK;
1746         for (i = 0; i < num; i++) {
1747                 buffer_info[rfd_index].skb = NULL;
1748                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1749                                         ATL1C_BUFFER_FREE);
1750                 if (++rfd_index == rfd_ring->count)
1751                         rfd_index = 0;
1752         }
1753         rfd_ring->next_to_clean = rfd_index;
1754 }
1755
1756 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1757                    int *work_done, int work_to_do)
1758 {
1759         u16 rfd_num, rfd_index;
1760         u16 count = 0;
1761         u16 length;
1762         struct pci_dev *pdev = adapter->pdev;
1763         struct net_device *netdev  = adapter->netdev;
1764         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1765         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1766         struct sk_buff *skb;
1767         struct atl1c_recv_ret_status *rrs;
1768         struct atl1c_buffer *buffer_info;
1769
1770         while (1) {
1771                 if (*work_done >= work_to_do)
1772                         break;
1773                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1774                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1775                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1776                                 RRS_RX_RFD_CNT_MASK;
1777                         if (unlikely(rfd_num != 1))
1778                                 /* TODO support mul rfd*/
1779                                 if (netif_msg_rx_err(adapter))
1780                                         dev_warn(&pdev->dev,
1781                                                 "Multi rfd not support yet!\n");
1782                         goto rrs_checked;
1783                 } else {
1784                         break;
1785                 }
1786 rrs_checked:
1787                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1788                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1789                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1790                                 if (netif_msg_rx_err(adapter))
1791                                         dev_warn(&pdev->dev,
1792                                                 "wrong packet! rrs word3 is %x\n",
1793                                                 rrs->word3);
1794                         continue;
1795                 }
1796
1797                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1798                                 RRS_PKT_SIZE_MASK);
1799                 /* Good Receive */
1800                 if (likely(rfd_num == 1)) {
1801                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1802                                         RRS_RX_RFD_INDEX_MASK;
1803                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1804                         pci_unmap_single(pdev, buffer_info->dma,
1805                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1806                         skb = buffer_info->skb;
1807                 } else {
1808                         /* TODO */
1809                         if (netif_msg_rx_err(adapter))
1810                                 dev_warn(&pdev->dev,
1811                                         "Multi rfd not support yet!\n");
1812                         break;
1813                 }
1814                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1815                 skb_put(skb, length - ETH_FCS_LEN);
1816                 skb->protocol = eth_type_trans(skb, netdev);
1817                 atl1c_rx_checksum(adapter, skb, rrs);
1818                 if (rrs->word3 & RRS_VLAN_INS) {
1819                         u16 vlan;
1820
1821                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1822                         vlan = le16_to_cpu(vlan);
1823                         __vlan_hwaccel_put_tag(skb, vlan);
1824                 }
1825                 netif_receive_skb(skb);
1826
1827                 (*work_done)++;
1828                 count++;
1829         }
1830         if (count)
1831                 atl1c_alloc_rx_buffer(adapter);
1832 }
1833
1834 /*
1835  * atl1c_clean - NAPI Rx polling callback
1836  * @adapter: board private structure
1837  */
1838 static int atl1c_clean(struct napi_struct *napi, int budget)
1839 {
1840         struct atl1c_adapter *adapter =
1841                         container_of(napi, struct atl1c_adapter, napi);
1842         int work_done = 0;
1843
1844         /* Keep link state information with original netdev */
1845         if (!netif_carrier_ok(adapter->netdev))
1846                 goto quit_polling;
1847         /* just enable one RXQ */
1848         atl1c_clean_rx_irq(adapter, &work_done, budget);
1849
1850         if (work_done < budget) {
1851 quit_polling:
1852                 napi_complete(napi);
1853                 adapter->hw.intr_mask |= ISR_RX_PKT;
1854                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1855         }
1856         return work_done;
1857 }
1858
1859 #ifdef CONFIG_NET_POLL_CONTROLLER
1860
1861 /*
1862  * Polling 'interrupt' - used by things like netconsole to send skbs
1863  * without having to re-enable interrupts. It's not called while
1864  * the interrupt routine is executing.
1865  */
1866 static void atl1c_netpoll(struct net_device *netdev)
1867 {
1868         struct atl1c_adapter *adapter = netdev_priv(netdev);
1869
1870         disable_irq(adapter->pdev->irq);
1871         atl1c_intr(adapter->pdev->irq, netdev);
1872         enable_irq(adapter->pdev->irq);
1873 }
1874 #endif
1875
1876 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1877 {
1878         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1879         u16 next_to_use = 0;
1880         u16 next_to_clean = 0;
1881
1882         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1883         next_to_use   = tpd_ring->next_to_use;
1884
1885         return (u16)(next_to_clean > next_to_use) ?
1886                 (next_to_clean - next_to_use - 1) :
1887                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1888 }
1889
1890 /*
1891  * get next usable tpd
1892  * Note: should call atl1c_tdp_avail to make sure
1893  * there is enough tpd to use
1894  */
1895 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1896         enum atl1c_trans_queue type)
1897 {
1898         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1899         struct atl1c_tpd_desc *tpd_desc;
1900         u16 next_to_use = 0;
1901
1902         next_to_use = tpd_ring->next_to_use;
1903         if (++tpd_ring->next_to_use == tpd_ring->count)
1904                 tpd_ring->next_to_use = 0;
1905         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1906         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1907         return  tpd_desc;
1908 }
1909
1910 static struct atl1c_buffer *
1911 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1912 {
1913         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1914
1915         return &tpd_ring->buffer_info[tpd -
1916                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1917 }
1918
1919 /* Calculate the transmit packet descript needed*/
1920 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1921 {
1922         u16 tpd_req;
1923         u16 proto_hdr_len = 0;
1924
1925         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1926
1927         if (skb_is_gso(skb)) {
1928                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1929                 if (proto_hdr_len < skb_headlen(skb))
1930                         tpd_req++;
1931                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1932                         tpd_req++;
1933         }
1934         return tpd_req;
1935 }
1936
1937 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1938                           struct sk_buff *skb,
1939                           struct atl1c_tpd_desc **tpd,
1940                           enum atl1c_trans_queue type)
1941 {
1942         struct pci_dev *pdev = adapter->pdev;
1943         u8 hdr_len;
1944         u32 real_len;
1945         unsigned short offload_type;
1946         int err;
1947
1948         if (skb_is_gso(skb)) {
1949                 if (skb_header_cloned(skb)) {
1950                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1951                         if (unlikely(err))
1952                                 return -1;
1953                 }
1954                 offload_type = skb_shinfo(skb)->gso_type;
1955
1956                 if (offload_type & SKB_GSO_TCPV4) {
1957                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1958                                         + ntohs(ip_hdr(skb)->tot_len));
1959
1960                         if (real_len < skb->len)
1961                                 pskb_trim(skb, real_len);
1962
1963                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1964                         if (unlikely(skb->len == hdr_len)) {
1965                                 /* only xsum need */
1966                                 if (netif_msg_tx_queued(adapter))
1967                                         dev_warn(&pdev->dev,
1968                                                 "IPV4 tso with zero data??\n");
1969                                 goto check_sum;
1970                         } else {
1971                                 ip_hdr(skb)->check = 0;
1972                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1973                                                         ip_hdr(skb)->saddr,
1974                                                         ip_hdr(skb)->daddr,
1975                                                         0, IPPROTO_TCP, 0);
1976                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1977                         }
1978                 }
1979
1980                 if (offload_type & SKB_GSO_TCPV6) {
1981                         struct atl1c_tpd_ext_desc *etpd =
1982                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1983
1984                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1985                         *tpd = atl1c_get_tpd(adapter, type);
1986                         ipv6_hdr(skb)->payload_len = 0;
1987                         /* check payload == 0 byte ? */
1988                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1989                         if (unlikely(skb->len == hdr_len)) {
1990                                 /* only xsum need */
1991                                 if (netif_msg_tx_queued(adapter))
1992                                         dev_warn(&pdev->dev,
1993                                                 "IPV6 tso with zero data??\n");
1994                                 goto check_sum;
1995                         } else
1996                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1997                                                 &ipv6_hdr(skb)->saddr,
1998                                                 &ipv6_hdr(skb)->daddr,
1999                                                 0, IPPROTO_TCP, 0);
2000                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2001                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2002                         etpd->pkt_len = cpu_to_le32(skb->len);
2003                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2004                 }
2005
2006                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2007                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2008                                 TPD_TCPHDR_OFFSET_SHIFT;
2009                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2010                                 TPD_MSS_SHIFT;
2011                 return 0;
2012         }
2013
2014 check_sum:
2015         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2016                 u8 css, cso;
2017                 cso = skb_checksum_start_offset(skb);
2018
2019                 if (unlikely(cso & 0x1)) {
2020                         if (netif_msg_tx_err(adapter))
2021                                 dev_err(&adapter->pdev->dev,
2022                                         "payload offset should not an event number\n");
2023                         return -1;
2024                 } else {
2025                         css = cso + skb->csum_offset;
2026
2027                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2028                                         TPD_PLOADOFFSET_SHIFT;
2029                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2030                                         TPD_CCSUM_OFFSET_SHIFT;
2031                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2032                 }
2033         }
2034         return 0;
2035 }
2036
2037 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2038                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2039                         enum atl1c_trans_queue type)
2040 {
2041         struct atl1c_tpd_desc *use_tpd = NULL;
2042         struct atl1c_buffer *buffer_info = NULL;
2043         u16 buf_len = skb_headlen(skb);
2044         u16 map_len = 0;
2045         u16 mapped_len = 0;
2046         u16 hdr_len = 0;
2047         u16 nr_frags;
2048         u16 f;
2049         int tso;
2050
2051         nr_frags = skb_shinfo(skb)->nr_frags;
2052         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2053         if (tso) {
2054                 /* TSO */
2055                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2056                 use_tpd = tpd;
2057
2058                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2059                 buffer_info->length = map_len;
2060                 buffer_info->dma = pci_map_single(adapter->pdev,
2061                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2062                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2063                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2064                         ATL1C_PCIMAP_TODEVICE);
2065                 mapped_len += map_len;
2066                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2067                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2068         }
2069
2070         if (mapped_len < buf_len) {
2071                 /* mapped_len == 0, means we should use the first tpd,
2072                    which is given by caller  */
2073                 if (mapped_len == 0)
2074                         use_tpd = tpd;
2075                 else {
2076                         use_tpd = atl1c_get_tpd(adapter, type);
2077                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2078                 }
2079                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2080                 buffer_info->length = buf_len - mapped_len;
2081                 buffer_info->dma =
2082                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2083                                         buffer_info->length, PCI_DMA_TODEVICE);
2084                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2085                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2086                         ATL1C_PCIMAP_TODEVICE);
2087                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2088                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2089         }
2090
2091         for (f = 0; f < nr_frags; f++) {
2092                 struct skb_frag_struct *frag;
2093
2094                 frag = &skb_shinfo(skb)->frags[f];
2095
2096                 use_tpd = atl1c_get_tpd(adapter, type);
2097                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2098
2099                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2100                 buffer_info->length = skb_frag_size(frag);
2101                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2102                                                     frag, 0,
2103                                                     buffer_info->length,
2104                                                     DMA_TO_DEVICE);
2105                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2106                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2107                         ATL1C_PCIMAP_TODEVICE);
2108                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2109                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2110         }
2111
2112         /* The last tpd */
2113         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2114         /* The last buffer info contain the skb address,
2115            so it will be free after unmap */
2116         buffer_info->skb = skb;
2117 }
2118
2119 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2120                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2121 {
2122         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2123         u32 prod_data;
2124
2125         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2126         switch (type) {
2127         case atl1c_trans_high:
2128                 prod_data &= 0xFFFF0000;
2129                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2130                 break;
2131         case atl1c_trans_normal:
2132                 prod_data &= 0x0000FFFF;
2133                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2134                 break;
2135         default:
2136                 break;
2137         }
2138         wmb();
2139         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2140 }
2141
2142 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2143                                           struct net_device *netdev)
2144 {
2145         struct atl1c_adapter *adapter = netdev_priv(netdev);
2146         unsigned long flags;
2147         u16 tpd_req = 1;
2148         struct atl1c_tpd_desc *tpd;
2149         enum atl1c_trans_queue type = atl1c_trans_normal;
2150
2151         if (test_bit(__AT_DOWN, &adapter->flags)) {
2152                 dev_kfree_skb_any(skb);
2153                 return NETDEV_TX_OK;
2154         }
2155
2156         tpd_req = atl1c_cal_tpd_req(skb);
2157         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2158                 if (netif_msg_pktdata(adapter))
2159                         dev_info(&adapter->pdev->dev, "tx locked\n");
2160                 return NETDEV_TX_LOCKED;
2161         }
2162
2163         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2164                 /* no enough descriptor, just stop queue */
2165                 netif_stop_queue(netdev);
2166                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2167                 return NETDEV_TX_BUSY;
2168         }
2169
2170         tpd = atl1c_get_tpd(adapter, type);
2171
2172         /* do TSO and check sum */
2173         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2174                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2175                 dev_kfree_skb_any(skb);
2176                 return NETDEV_TX_OK;
2177         }
2178
2179         if (unlikely(vlan_tx_tag_present(skb))) {
2180                 u16 vlan = vlan_tx_tag_get(skb);
2181                 __le16 tag;
2182
2183                 vlan = cpu_to_le16(vlan);
2184                 AT_VLAN_TO_TAG(vlan, tag);
2185                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2186                 tpd->vlan_tag = tag;
2187         }
2188
2189         if (skb_network_offset(skb) != ETH_HLEN)
2190                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2191
2192         atl1c_tx_map(adapter, skb, tpd, type);
2193         atl1c_tx_queue(adapter, skb, tpd, type);
2194
2195         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2196         return NETDEV_TX_OK;
2197 }
2198
2199 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2200 {
2201         struct net_device *netdev = adapter->netdev;
2202
2203         free_irq(adapter->pdev->irq, netdev);
2204
2205         if (adapter->have_msi)
2206                 pci_disable_msi(adapter->pdev);
2207 }
2208
2209 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2210 {
2211         struct pci_dev    *pdev   = adapter->pdev;
2212         struct net_device *netdev = adapter->netdev;
2213         int flags = 0;
2214         int err = 0;
2215
2216         adapter->have_msi = true;
2217         err = pci_enable_msi(adapter->pdev);
2218         if (err) {
2219                 if (netif_msg_ifup(adapter))
2220                         dev_err(&pdev->dev,
2221                                 "Unable to allocate MSI interrupt Error: %d\n",
2222                                 err);
2223                 adapter->have_msi = false;
2224         }
2225
2226         if (!adapter->have_msi)
2227                 flags |= IRQF_SHARED;
2228         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2229                         netdev->name, netdev);
2230         if (err) {
2231                 if (netif_msg_ifup(adapter))
2232                         dev_err(&pdev->dev,
2233                                 "Unable to allocate interrupt Error: %d\n",
2234                                 err);
2235                 if (adapter->have_msi)
2236                         pci_disable_msi(adapter->pdev);
2237                 return err;
2238         }
2239         if (netif_msg_ifup(adapter))
2240                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2241         return err;
2242 }
2243
2244 static int atl1c_up(struct atl1c_adapter *adapter)
2245 {
2246         struct net_device *netdev = adapter->netdev;
2247         int num;
2248         int err;
2249
2250         netif_carrier_off(netdev);
2251         atl1c_init_ring_ptrs(adapter);
2252         atl1c_set_multi(netdev);
2253         atl1c_restore_vlan(adapter);
2254
2255         num = atl1c_alloc_rx_buffer(adapter);
2256         if (unlikely(num == 0)) {
2257                 err = -ENOMEM;
2258                 goto err_alloc_rx;
2259         }
2260
2261         if (atl1c_configure(adapter)) {
2262                 err = -EIO;
2263                 goto err_up;
2264         }
2265
2266         err = atl1c_request_irq(adapter);
2267         if (unlikely(err))
2268                 goto err_up;
2269
2270         clear_bit(__AT_DOWN, &adapter->flags);
2271         napi_enable(&adapter->napi);
2272         atl1c_irq_enable(adapter);
2273         atl1c_check_link_status(adapter);
2274         netif_start_queue(netdev);
2275         return err;
2276
2277 err_up:
2278 err_alloc_rx:
2279         atl1c_clean_rx_ring(adapter);
2280         return err;
2281 }
2282
2283 static void atl1c_down(struct atl1c_adapter *adapter)
2284 {
2285         struct net_device *netdev = adapter->netdev;
2286
2287         atl1c_del_timer(adapter);
2288         adapter->work_event = 0; /* clear all event */
2289         /* signal that we're down so the interrupt handler does not
2290          * reschedule our watchdog timer */
2291         set_bit(__AT_DOWN, &adapter->flags);
2292         netif_carrier_off(netdev);
2293         napi_disable(&adapter->napi);
2294         atl1c_irq_disable(adapter);
2295         atl1c_free_irq(adapter);
2296         /* reset MAC to disable all RX/TX */
2297         atl1c_reset_mac(&adapter->hw);
2298         msleep(1);
2299
2300         adapter->link_speed = SPEED_0;
2301         adapter->link_duplex = -1;
2302         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2303         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2304         atl1c_clean_rx_ring(adapter);
2305 }
2306
2307 /*
2308  * atl1c_open - Called when a network interface is made active
2309  * @netdev: network interface device structure
2310  *
2311  * Returns 0 on success, negative value on failure
2312  *
2313  * The open entry point is called when a network interface is made
2314  * active by the system (IFF_UP).  At this point all resources needed
2315  * for transmit and receive operations are allocated, the interrupt
2316  * handler is registered with the OS, the watchdog timer is started,
2317  * and the stack is notified that the interface is ready.
2318  */
2319 static int atl1c_open(struct net_device *netdev)
2320 {
2321         struct atl1c_adapter *adapter = netdev_priv(netdev);
2322         int err;
2323
2324         /* disallow open during test */
2325         if (test_bit(__AT_TESTING, &adapter->flags))
2326                 return -EBUSY;
2327
2328         /* allocate rx/tx dma buffer & descriptors */
2329         err = atl1c_setup_ring_resources(adapter);
2330         if (unlikely(err))
2331                 return err;
2332
2333         err = atl1c_up(adapter);
2334         if (unlikely(err))
2335                 goto err_up;
2336
2337         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2338                 u32 phy_data;
2339
2340                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2341                 phy_data |= MDIO_AP_EN;
2342                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2343         }
2344         return 0;
2345
2346 err_up:
2347         atl1c_free_irq(adapter);
2348         atl1c_free_ring_resources(adapter);
2349         atl1c_reset_mac(&adapter->hw);
2350         return err;
2351 }
2352
2353 /*
2354  * atl1c_close - Disables a network interface
2355  * @netdev: network interface device structure
2356  *
2357  * Returns 0, this is not allowed to fail
2358  *
2359  * The close entry point is called when an interface is de-activated
2360  * by the OS.  The hardware is still under the drivers control, but
2361  * needs to be disabled.  A global MAC reset is issued to stop the
2362  * hardware, and all transmit and receive resources are freed.
2363  */
2364 static int atl1c_close(struct net_device *netdev)
2365 {
2366         struct atl1c_adapter *adapter = netdev_priv(netdev);
2367
2368         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2369         atl1c_down(adapter);
2370         atl1c_free_ring_resources(adapter);
2371         return 0;
2372 }
2373
2374 static int atl1c_suspend(struct device *dev)
2375 {
2376         struct pci_dev *pdev = to_pci_dev(dev);
2377         struct net_device *netdev = pci_get_drvdata(pdev);
2378         struct atl1c_adapter *adapter = netdev_priv(netdev);
2379         struct atl1c_hw *hw = &adapter->hw;
2380         u32 mac_ctrl_data = 0;
2381         u32 master_ctrl_data = 0;
2382         u32 wol_ctrl_data = 0;
2383         u16 mii_intr_status_data = 0;
2384         u32 wufc = adapter->wol;
2385
2386         atl1c_disable_l0s_l1(hw);
2387         if (netif_running(netdev)) {
2388                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2389                 atl1c_down(adapter);
2390         }
2391         netif_device_detach(netdev);
2392
2393         if (wufc)
2394                 if (atl1c_phy_power_saving(hw) != 0)
2395                         dev_dbg(&pdev->dev, "phy power saving failed");
2396
2397         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2398         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
2399
2400         master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2401         mac_ctrl_data &= ~(MAC_CTRL_PRMLEN_MASK << MAC_CTRL_PRMLEN_SHIFT);
2402         mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2403                         MAC_CTRL_PRMLEN_MASK) <<
2404                         MAC_CTRL_PRMLEN_SHIFT);
2405         mac_ctrl_data &= ~(MAC_CTRL_SPEED_MASK << MAC_CTRL_SPEED_SHIFT);
2406         mac_ctrl_data &= ~MAC_CTRL_DUPLX;
2407
2408         if (wufc) {
2409                 mac_ctrl_data |= MAC_CTRL_RX_EN;
2410                 if (adapter->link_speed == SPEED_1000 ||
2411                         adapter->link_speed == SPEED_0) {
2412                         mac_ctrl_data |= atl1c_mac_speed_1000 <<
2413                                         MAC_CTRL_SPEED_SHIFT;
2414                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2415                 } else
2416                         mac_ctrl_data |= atl1c_mac_speed_10_100 <<
2417                                         MAC_CTRL_SPEED_SHIFT;
2418
2419                 if (adapter->link_duplex == DUPLEX_FULL)
2420                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2421
2422                 /* turn on magic packet wol */
2423                 if (wufc & AT_WUFC_MAG)
2424                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2425
2426                 if (wufc & AT_WUFC_LNKC) {
2427                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2428                         /* only link up can wake up */
2429                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2430                                 dev_dbg(&pdev->dev, "%s: read write phy "
2431                                                   "register failed.\n",
2432                                                   atl1c_driver_name);
2433                         }
2434                 }
2435                 /* clear phy interrupt */
2436                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2437                 /* Config MAC Ctrl register */
2438                 __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
2439
2440                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2441                 if (wufc & AT_WUFC_MAG)
2442                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2443
2444                 dev_dbg(&pdev->dev,
2445                         "%s: suspend MAC=0x%x\n",
2446                         atl1c_driver_name, mac_ctrl_data);
2447                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2448                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2449                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2450
2451                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
2452                         GPHY_CTRL_EXT_RESET);
2453         } else {
2454                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_POWER_SAVING);
2455                 master_ctrl_data |= MASTER_CTRL_CLK_SEL_DIS;
2456                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2457                 mac_ctrl_data |= MAC_CTRL_DUPLX;
2458                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2459                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2460                 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2461                 hw->phy_configured = false; /* re-init PHY when resume */
2462         }
2463
2464         return 0;
2465 }
2466
2467 #ifdef CONFIG_PM_SLEEP
2468 static int atl1c_resume(struct device *dev)
2469 {
2470         struct pci_dev *pdev = to_pci_dev(dev);
2471         struct net_device *netdev = pci_get_drvdata(pdev);
2472         struct atl1c_adapter *adapter = netdev_priv(netdev);
2473
2474         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2475         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2476                         ATL1C_PCIE_PHY_RESET);
2477
2478         atl1c_phy_reset(&adapter->hw);
2479         atl1c_reset_mac(&adapter->hw);
2480         atl1c_phy_init(&adapter->hw);
2481
2482 #if 0
2483         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2484         pm_data &= ~PM_CTRLSTAT_PME_EN;
2485         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2486 #endif
2487
2488         netif_device_attach(netdev);
2489         if (netif_running(netdev))
2490                 atl1c_up(adapter);
2491
2492         return 0;
2493 }
2494 #endif
2495
2496 static void atl1c_shutdown(struct pci_dev *pdev)
2497 {
2498         struct net_device *netdev = pci_get_drvdata(pdev);
2499         struct atl1c_adapter *adapter = netdev_priv(netdev);
2500
2501         atl1c_suspend(&pdev->dev);
2502         pci_wake_from_d3(pdev, adapter->wol);
2503         pci_set_power_state(pdev, PCI_D3hot);
2504 }
2505
2506 static const struct net_device_ops atl1c_netdev_ops = {
2507         .ndo_open               = atl1c_open,
2508         .ndo_stop               = atl1c_close,
2509         .ndo_validate_addr      = eth_validate_addr,
2510         .ndo_start_xmit         = atl1c_xmit_frame,
2511         .ndo_set_mac_address    = atl1c_set_mac_addr,
2512         .ndo_set_rx_mode        = atl1c_set_multi,
2513         .ndo_change_mtu         = atl1c_change_mtu,
2514         .ndo_fix_features       = atl1c_fix_features,
2515         .ndo_set_features       = atl1c_set_features,
2516         .ndo_do_ioctl           = atl1c_ioctl,
2517         .ndo_tx_timeout         = atl1c_tx_timeout,
2518         .ndo_get_stats          = atl1c_get_stats,
2519 #ifdef CONFIG_NET_POLL_CONTROLLER
2520         .ndo_poll_controller    = atl1c_netpoll,
2521 #endif
2522 };
2523
2524 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2525 {
2526         SET_NETDEV_DEV(netdev, &pdev->dev);
2527         pci_set_drvdata(pdev, netdev);
2528
2529         netdev->netdev_ops = &atl1c_netdev_ops;
2530         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2531         atl1c_set_ethtool_ops(netdev);
2532
2533         /* TODO: add when ready */
2534         netdev->hw_features =   NETIF_F_SG         |
2535                                 NETIF_F_HW_CSUM    |
2536                                 NETIF_F_HW_VLAN_RX |
2537                                 NETIF_F_TSO        |
2538                                 NETIF_F_TSO6;
2539         netdev->features =      netdev->hw_features |
2540                                 NETIF_F_HW_VLAN_TX;
2541         return 0;
2542 }
2543
2544 /*
2545  * atl1c_probe - Device Initialization Routine
2546  * @pdev: PCI device information struct
2547  * @ent: entry in atl1c_pci_tbl
2548  *
2549  * Returns 0 on success, negative on failure
2550  *
2551  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2552  * The OS initialization, configuring of the adapter private structure,
2553  * and a hardware reset occur.
2554  */
2555 static int __devinit atl1c_probe(struct pci_dev *pdev,
2556                                  const struct pci_device_id *ent)
2557 {
2558         struct net_device *netdev;
2559         struct atl1c_adapter *adapter;
2560         static int cards_found;
2561
2562         int err = 0;
2563
2564         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2565         err = pci_enable_device_mem(pdev);
2566         if (err) {
2567                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2568                 return err;
2569         }
2570
2571         /*
2572          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2573          * shared register for the high 32 bits, so only a single, aligned,
2574          * 4 GB physical address range can be used at a time.
2575          *
2576          * Supporting 64-bit DMA on this hardware is more trouble than it's
2577          * worth.  It is far easier to limit to 32-bit DMA than update
2578          * various kernel subsystems to support the mechanics required by a
2579          * fixed-high-32-bit system.
2580          */
2581         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2582             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2583                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2584                 goto err_dma;
2585         }
2586
2587         err = pci_request_regions(pdev, atl1c_driver_name);
2588         if (err) {
2589                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2590                 goto err_pci_reg;
2591         }
2592
2593         pci_set_master(pdev);
2594
2595         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2596         if (netdev == NULL) {
2597                 err = -ENOMEM;
2598                 goto err_alloc_etherdev;
2599         }
2600
2601         err = atl1c_init_netdev(netdev, pdev);
2602         if (err) {
2603                 dev_err(&pdev->dev, "init netdevice failed\n");
2604                 goto err_init_netdev;
2605         }
2606         adapter = netdev_priv(netdev);
2607         adapter->bd_number = cards_found;
2608         adapter->netdev = netdev;
2609         adapter->pdev = pdev;
2610         adapter->hw.adapter = adapter;
2611         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2612         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2613         if (!adapter->hw.hw_addr) {
2614                 err = -EIO;
2615                 dev_err(&pdev->dev, "cannot map device registers\n");
2616                 goto err_ioremap;
2617         }
2618
2619         /* init mii data */
2620         adapter->mii.dev = netdev;
2621         adapter->mii.mdio_read  = atl1c_mdio_read;
2622         adapter->mii.mdio_write = atl1c_mdio_write;
2623         adapter->mii.phy_id_mask = 0x1f;
2624         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2625         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2626         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2627                         (unsigned long)adapter);
2628         /* setup the private structure */
2629         err = atl1c_sw_init(adapter);
2630         if (err) {
2631                 dev_err(&pdev->dev, "net device private data init failed\n");
2632                 goto err_sw_init;
2633         }
2634         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2635                         ATL1C_PCIE_PHY_RESET);
2636
2637         /* Init GPHY as early as possible due to power saving issue  */
2638         atl1c_phy_reset(&adapter->hw);
2639
2640         err = atl1c_reset_mac(&adapter->hw);
2641         if (err) {
2642                 err = -EIO;
2643                 goto err_reset;
2644         }
2645
2646         /* reset the controller to
2647          * put the device in a known good starting state */
2648         err = atl1c_phy_init(&adapter->hw);
2649         if (err) {
2650                 err = -EIO;
2651                 goto err_reset;
2652         }
2653         if (atl1c_read_mac_addr(&adapter->hw)) {
2654                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2655                 netdev->addr_assign_type |= NET_ADDR_RANDOM;
2656         }
2657         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2658         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2659         if (netif_msg_probe(adapter))
2660                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2661                         adapter->hw.mac_addr);
2662
2663         atl1c_hw_set_mac_addr(&adapter->hw);
2664         INIT_WORK(&adapter->common_task, atl1c_common_task);
2665         adapter->work_event = 0;
2666         err = register_netdev(netdev);
2667         if (err) {
2668                 dev_err(&pdev->dev, "register netdevice failed\n");
2669                 goto err_register;
2670         }
2671
2672         if (netif_msg_probe(adapter))
2673                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2674         cards_found++;
2675         return 0;
2676
2677 err_reset:
2678 err_register:
2679 err_sw_init:
2680         iounmap(adapter->hw.hw_addr);
2681 err_init_netdev:
2682 err_ioremap:
2683         free_netdev(netdev);
2684 err_alloc_etherdev:
2685         pci_release_regions(pdev);
2686 err_pci_reg:
2687 err_dma:
2688         pci_disable_device(pdev);
2689         return err;
2690 }
2691
2692 /*
2693  * atl1c_remove - Device Removal Routine
2694  * @pdev: PCI device information struct
2695  *
2696  * atl1c_remove is called by the PCI subsystem to alert the driver
2697  * that it should release a PCI device.  The could be caused by a
2698  * Hot-Plug event, or because the driver is going to be removed from
2699  * memory.
2700  */
2701 static void __devexit atl1c_remove(struct pci_dev *pdev)
2702 {
2703         struct net_device *netdev = pci_get_drvdata(pdev);
2704         struct atl1c_adapter *adapter = netdev_priv(netdev);
2705
2706         unregister_netdev(netdev);
2707         atl1c_phy_disable(&adapter->hw);
2708
2709         iounmap(adapter->hw.hw_addr);
2710
2711         pci_release_regions(pdev);
2712         pci_disable_device(pdev);
2713         free_netdev(netdev);
2714 }
2715
2716 /*
2717  * atl1c_io_error_detected - called when PCI error is detected
2718  * @pdev: Pointer to PCI device
2719  * @state: The current pci connection state
2720  *
2721  * This function is called after a PCI bus error affecting
2722  * this device has been detected.
2723  */
2724 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2725                                                 pci_channel_state_t state)
2726 {
2727         struct net_device *netdev = pci_get_drvdata(pdev);
2728         struct atl1c_adapter *adapter = netdev_priv(netdev);
2729
2730         netif_device_detach(netdev);
2731
2732         if (state == pci_channel_io_perm_failure)
2733                 return PCI_ERS_RESULT_DISCONNECT;
2734
2735         if (netif_running(netdev))
2736                 atl1c_down(adapter);
2737
2738         pci_disable_device(pdev);
2739
2740         /* Request a slot slot reset. */
2741         return PCI_ERS_RESULT_NEED_RESET;
2742 }
2743
2744 /*
2745  * atl1c_io_slot_reset - called after the pci bus has been reset.
2746  * @pdev: Pointer to PCI device
2747  *
2748  * Restart the card from scratch, as if from a cold-boot. Implementation
2749  * resembles the first-half of the e1000_resume routine.
2750  */
2751 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2752 {
2753         struct net_device *netdev = pci_get_drvdata(pdev);
2754         struct atl1c_adapter *adapter = netdev_priv(netdev);
2755
2756         if (pci_enable_device(pdev)) {
2757                 if (netif_msg_hw(adapter))
2758                         dev_err(&pdev->dev,
2759                                 "Cannot re-enable PCI device after reset\n");
2760                 return PCI_ERS_RESULT_DISCONNECT;
2761         }
2762         pci_set_master(pdev);
2763
2764         pci_enable_wake(pdev, PCI_D3hot, 0);
2765         pci_enable_wake(pdev, PCI_D3cold, 0);
2766
2767         atl1c_reset_mac(&adapter->hw);
2768
2769         return PCI_ERS_RESULT_RECOVERED;
2770 }
2771
2772 /*
2773  * atl1c_io_resume - called when traffic can start flowing again.
2774  * @pdev: Pointer to PCI device
2775  *
2776  * This callback is called when the error recovery driver tells us that
2777  * its OK to resume normal operation. Implementation resembles the
2778  * second-half of the atl1c_resume routine.
2779  */
2780 static void atl1c_io_resume(struct pci_dev *pdev)
2781 {
2782         struct net_device *netdev = pci_get_drvdata(pdev);
2783         struct atl1c_adapter *adapter = netdev_priv(netdev);
2784
2785         if (netif_running(netdev)) {
2786                 if (atl1c_up(adapter)) {
2787                         if (netif_msg_hw(adapter))
2788                                 dev_err(&pdev->dev,
2789                                         "Cannot bring device back up after reset\n");
2790                         return;
2791                 }
2792         }
2793
2794         netif_device_attach(netdev);
2795 }
2796
2797 static struct pci_error_handlers atl1c_err_handler = {
2798         .error_detected = atl1c_io_error_detected,
2799         .slot_reset = atl1c_io_slot_reset,
2800         .resume = atl1c_io_resume,
2801 };
2802
2803 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2804
2805 static struct pci_driver atl1c_driver = {
2806         .name     = atl1c_driver_name,
2807         .id_table = atl1c_pci_tbl,
2808         .probe    = atl1c_probe,
2809         .remove   = __devexit_p(atl1c_remove),
2810         .shutdown = atl1c_shutdown,
2811         .err_handler = &atl1c_err_handler,
2812         .driver.pm = &atl1c_pm_ops,
2813 };
2814
2815 /*
2816  * atl1c_init_module - Driver Registration Routine
2817  *
2818  * atl1c_init_module is the first routine called when the driver is
2819  * loaded. All it does is register with the PCI subsystem.
2820  */
2821 static int __init atl1c_init_module(void)
2822 {
2823         return pci_register_driver(&atl1c_driver);
2824 }
2825
2826 /*
2827  * atl1c_exit_module - Driver Exit Cleanup Routine
2828  *
2829  * atl1c_exit_module is called just before the driver is removed
2830  * from memory.
2831  */
2832 static void __exit atl1c_exit_module(void)
2833 {
2834         pci_unregister_driver(&atl1c_driver);
2835 }
2836
2837 module_init(atl1c_init_module);
2838 module_exit(atl1c_exit_module);