drivers/net/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 "1.0.0.1-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 /*
  30  * atl1c_pci_tbl - PCI Device ID Table
  31  *
  32  * Wildcard entries (PCI_ANY_ID) should come last
  33  * Last entry must be all 0s
  34  *
  35  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  36  *   Class, Class Mask, private data (not used) }
  37  */
  38 static struct pci_device_id atl1c_pci_tbl[] = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  45
  46 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(ATL1C_DRV_VERSION);
  50
  51 static int atl1c_stop_mac(struct atl1c_hw *hw);
  52 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
  53 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
  54 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  55 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
  56 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
  57 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
  58                    int *work_done, int work_to_do);
  59
  60 static const u16 atl1c_pay_load_size[] = {
  61         128, 256, 512, 1024, 2048, 4096,
  62 };
  63
  64 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
  65 {
  66         REG_MB_RFD0_PROD_IDX,
  67         REG_MB_RFD1_PROD_IDX,
  68         REG_MB_RFD2_PROD_IDX,
  69         REG_MB_RFD3_PROD_IDX
  70 };
  71
  72 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  73 {
  74         REG_RFD0_HEAD_ADDR_LO,
  75         REG_RFD1_HEAD_ADDR_LO,
  76         REG_RFD2_HEAD_ADDR_LO,
  77         REG_RFD3_HEAD_ADDR_LO
  78 };
  79
  80 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  81 {
  82         REG_RRD0_HEAD_ADDR_LO,
  83         REG_RRD1_HEAD_ADDR_LO,
  84         REG_RRD2_HEAD_ADDR_LO,
  85         REG_RRD3_HEAD_ADDR_LO
  86 };
  87
  88 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  89         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  90
  91 /*
  92  * atl1c_init_pcie - init PCIE module
  93  */
  94 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
  95 {
  96         u32 data;
  97         u32 pci_cmd;
  98         struct pci_dev *pdev = hw->adapter->pdev;
  99
 100         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 101         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 102         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 103                 PCI_COMMAND_IO);
 104         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 105
 106         /*
 107          * Clear any PowerSaveing Settings
 108          */
 109         pci_enable_wake(pdev, PCI_D3hot, 0);
 110         pci_enable_wake(pdev, PCI_D3cold, 0);
 111
 112         /*
 113          * Mask some pcie error bits
 114          */
 115         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
 116         data &= ~PCIE_UC_SERVRITY_DLP;
 117         data &= ~PCIE_UC_SERVRITY_FCP;
 118         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
 119
 120         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 121                 atl1c_disable_l0s_l1(hw);
 122         if (flag & ATL1C_PCIE_PHY_RESET)
 123                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 124         else
 125                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 126                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 127
 128         msleep(1);
 129 }
 130
 131 /*
 132  * atl1c_irq_enable - Enable default interrupt generation settings
 133  * @adapter: board private structure
 134  */
 135 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 136 {
 137         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 138                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 139                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 140                 AT_WRITE_FLUSH(&adapter->hw);
 141         }
 142 }
 143
 144 /*
 145  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 146  * @adapter: board private structure
 147  */
 148 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 149 {
 150         atomic_inc(&adapter->irq_sem);
 151         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 152         AT_WRITE_FLUSH(&adapter->hw);
 153         synchronize_irq(adapter->pdev->irq);
 154 }
 155
 156 /*
 157  * atl1c_irq_reset - reset interrupt confiure on the NIC
 158  * @adapter: board private structure
 159  */
 160 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 161 {
 162         atomic_set(&adapter->irq_sem, 1);
 163         atl1c_irq_enable(adapter);
 164 }
 165
 166 /*
 167  * atl1c_phy_config - Timer Call-back
 168  * @data: pointer to netdev cast into an unsigned long
 169  */
 170 static void atl1c_phy_config(unsigned long data)
 171 {
 172         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 173         struct atl1c_hw *hw = &adapter->hw;
 174         unsigned long flags;
 175
 176         spin_lock_irqsave(&adapter->mdio_lock, flags);
 177         atl1c_restart_autoneg(hw);
 178         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 179 }
 180
 181 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 182 {
 183
 184         WARN_ON(in_interrupt());
 185         atl1c_down(adapter);
 186         atl1c_up(adapter);
 187         clear_bit(__AT_RESETTING, &adapter->flags);
 188 }
 189
 190 static void atl1c_reset_task(struct work_struct *work)
 191 {
 192         struct atl1c_adapter *adapter;
 193         struct net_device *netdev;
 194
 195         adapter = container_of(work, struct atl1c_adapter, reset_task);
 196         netdev = adapter->netdev;
 197
 198         netif_device_detach(netdev);
 199         atl1c_down(adapter);
 200         atl1c_up(adapter);
 201         netif_device_attach(netdev);
 202 }
 203
 204 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 205 {
 206         struct atl1c_hw *hw = &adapter->hw;
 207         struct net_device *netdev = adapter->netdev;
 208         struct pci_dev    *pdev   = adapter->pdev;
 209         int err;
 210         unsigned long flags;
 211         u16 speed, duplex, phy_data;
 212
 213         spin_lock_irqsave(&adapter->mdio_lock, flags);
 214         /* MII_BMSR must read twise */
 215         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 216         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 217         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 218
 219         if ((phy_data & BMSR_LSTATUS) == 0) {
 220                 /* link down */
 221                 if (netif_carrier_ok(netdev)) {
 222                         hw->hibernate = true;
 223                         atl1c_set_aspm(hw, false);
 224                         if (atl1c_stop_mac(hw) != 0)
 225                                 if (netif_msg_hw(adapter))
 226                                         dev_warn(&pdev->dev,
 227                                                 "stop mac failed\n");
 228                 }
 229                 netif_carrier_off(netdev);
 230         } else {
 231                 /* Link Up */
 232                 hw->hibernate = false;
 233                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 234                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 235                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 236                 if (unlikely(err))
 237                         return;
 238                 /* link result is our setting */
 239                 if (adapter->link_speed != speed ||
 240                     adapter->link_duplex != duplex) {
 241                         adapter->link_speed  = speed;
 242                         adapter->link_duplex = duplex;
 243                         atl1c_enable_tx_ctrl(hw);
 244                         atl1c_enable_rx_ctrl(hw);
 245                         atl1c_setup_mac_ctrl(adapter);
 246                         atl1c_set_aspm(hw, true);
 247                         if (netif_msg_link(adapter))
 248                                 dev_info(&pdev->dev,
 249                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 250                                         atl1c_driver_name, netdev->name,
 251                                         adapter->link_speed,
 252                                         adapter->link_duplex == FULL_DUPLEX ?
 253                                         "Full Duplex" : "Half Duplex");
 254                 }
 255                 if (!netif_carrier_ok(netdev))
 256                         netif_carrier_on(netdev);
 257         }
 258 }
 259
 260 /*
 261  * atl1c_link_chg_task - deal with link change event Out of interrupt context
 262  * @netdev: network interface device structure
 263  */
 264 static void atl1c_link_chg_task(struct work_struct *work)
 265 {
 266         struct atl1c_adapter *adapter;
 267
 268         adapter = container_of(work, struct atl1c_adapter, link_chg_task);
 269         atl1c_check_link_status(adapter);
 270 }
 271
 272 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 273 {
 274         struct net_device *netdev = adapter->netdev;
 275         struct pci_dev    *pdev   = adapter->pdev;
 276         u16 phy_data;
 277         u16 link_up;
 278
 279         spin_lock(&adapter->mdio_lock);
 280         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 281         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 282         spin_unlock(&adapter->mdio_lock);
 283         link_up = phy_data & BMSR_LSTATUS;
 284         /* notify upper layer link down ASAP */
 285         if (!link_up) {
 286                 if (netif_carrier_ok(netdev)) {
 287                         /* old link state: Up */
 288                         netif_carrier_off(netdev);
 289                         if (netif_msg_link(adapter))
 290                                 dev_info(&pdev->dev,
 291                                         "%s: %s NIC Link is Down\n",
 292                                         atl1c_driver_name, netdev->name);
 293                         adapter->link_speed = SPEED_0;
 294                 }
 295         }
 296         schedule_work(&adapter->link_chg_task);
 297 }
 298
 299 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 300 {
 301         del_timer_sync(&adapter->phy_config_timer);
 302 }
 303
 304 static void atl1c_cancel_work(struct atl1c_adapter *adapter)
 305 {
 306         cancel_work_sync(&adapter->reset_task);
 307         cancel_work_sync(&adapter->link_chg_task);
 308 }
 309
 310 /*
 311  * atl1c_tx_timeout - Respond to a Tx Hang
 312  * @netdev: network interface device structure
 313  */
 314 static void atl1c_tx_timeout(struct net_device *netdev)
 315 {
 316         struct atl1c_adapter *adapter = netdev_priv(netdev);
 317
 318         /* Do the reset outside of interrupt context */
 319         schedule_work(&adapter->reset_task);
 320 }
 321
 322 /*
 323  * atl1c_set_multi - Multicast and Promiscuous mode set
 324  * @netdev: network interface device structure
 325  *
 326  * The set_multi entry point is called whenever the multicast address
 327  * list or the network interface flags are updated.  This routine is
 328  * responsible for configuring the hardware for proper multicast,
 329  * promiscuous mode, and all-multi behavior.
 330  */
 331 static void atl1c_set_multi(struct net_device *netdev)
 332 {
 333         struct atl1c_adapter *adapter = netdev_priv(netdev);
 334         struct atl1c_hw *hw = &adapter->hw;
 335         struct dev_mc_list *mc_ptr;
 336         u32 mac_ctrl_data;
 337         u32 hash_value;
 338
 339         /* Check for Promiscuous and All Multicast modes */
 340         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 341
 342         if (netdev->flags & IFF_PROMISC) {
 343                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 344         } else if (netdev->flags & IFF_ALLMULTI) {
 345                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 346                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 347         } else {
 348                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 349         }
 350
 351         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 352
 353         /* clear the old settings from the multicast hash table */
 354         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 355         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 356
 357         /* comoute mc addresses' hash value ,and put it into hash table */
 358         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 359                 hash_value = atl1c_hash_mc_addr(hw, mc_ptr->dmi_addr);
 360                 atl1c_hash_set(hw, hash_value);
 361         }
 362 }
 363
 364 static void atl1c_vlan_rx_register(struct net_device *netdev,
 365                                    struct vlan_group *grp)
 366 {
 367         struct atl1c_adapter *adapter = netdev_priv(netdev);
 368         struct pci_dev *pdev = adapter->pdev;
 369         u32 mac_ctrl_data = 0;
 370
 371         if (netif_msg_pktdata(adapter))
 372                 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
 373
 374         atl1c_irq_disable(adapter);
 375
 376         adapter->vlgrp = grp;
 377         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 378
 379         if (grp) {
 380                 /* enable VLAN tag insert/strip */
 381                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 382         } else {
 383                 /* disable VLAN tag insert/strip */
 384                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 385         }
 386
 387         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 388         atl1c_irq_enable(adapter);
 389 }
 390
 391 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 392 {
 393         struct pci_dev *pdev = adapter->pdev;
 394
 395         if (netif_msg_pktdata(adapter))
 396                 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
 397         atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 398 }
 399 /*
 400  * atl1c_set_mac - Change the Ethernet Address of the NIC
 401  * @netdev: network interface device structure
 402  * @p: pointer to an address structure
 403  *
 404  * Returns 0 on success, negative on failure
 405  */
 406 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 407 {
 408         struct atl1c_adapter *adapter = netdev_priv(netdev);
 409         struct sockaddr *addr = p;
 410
 411         if (!is_valid_ether_addr(addr->sa_data))
 412                 return -EADDRNOTAVAIL;
 413
 414         if (netif_running(netdev))
 415                 return -EBUSY;
 416
 417         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 418         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 419
 420         atl1c_hw_set_mac_addr(&adapter->hw);
 421
 422         return 0;
 423 }
 424
 425 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 426                                 struct net_device *dev)
 427 {
 428         int mtu = dev->mtu;
 429
 430         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 431                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 432 }
 433 /*
 434  * atl1c_change_mtu - Change the Maximum Transfer Unit
 435  * @netdev: network interface device structure
 436  * @new_mtu: new value for maximum frame size
 437  *
 438  * Returns 0 on success, negative on failure
 439  */
 440 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 441 {
 442         struct atl1c_adapter *adapter = netdev_priv(netdev);
 443         int old_mtu   = netdev->mtu;
 444         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 445
 446         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 447                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 448                 if (netif_msg_link(adapter))
 449                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 450                 return -EINVAL;
 451         }
 452         /* set MTU */
 453         if (old_mtu != new_mtu && netif_running(netdev)) {
 454                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 455                         msleep(1);
 456                 netdev->mtu = new_mtu;
 457                 adapter->hw.max_frame_size = new_mtu;
 458                 atl1c_set_rxbufsize(adapter, netdev);
 459                 atl1c_down(adapter);
 460                 atl1c_up(adapter);
 461                 clear_bit(__AT_RESETTING, &adapter->flags);
 462                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 463                         u32 phy_data;
 464
 465                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 466                         phy_data |= 0x10000000;
 467                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 468                 }
 469
 470         }
 471         return 0;
 472 }
 473
 474 /*
 475  *  caller should hold mdio_lock
 476  */
 477 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 478 {
 479         struct atl1c_adapter *adapter = netdev_priv(netdev);
 480         u16 result;
 481
 482         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 483         return result;
 484 }
 485
 486 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 487                              int reg_num, int val)
 488 {
 489         struct atl1c_adapter *adapter = netdev_priv(netdev);
 490
 491         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 492 }
 493
 494 /*
 495  * atl1c_mii_ioctl -
 496  * @netdev:
 497  * @ifreq:
 498  * @cmd:
 499  */
 500 static int atl1c_mii_ioctl(struct net_device *netdev,
 501                            struct ifreq *ifr, int cmd)
 502 {
 503         struct atl1c_adapter *adapter = netdev_priv(netdev);
 504         struct pci_dev *pdev = adapter->pdev;
 505         struct mii_ioctl_data *data = if_mii(ifr);
 506         unsigned long flags;
 507         int retval = 0;
 508
 509         if (!netif_running(netdev))
 510                 return -EINVAL;
 511
 512         spin_lock_irqsave(&adapter->mdio_lock, flags);
 513         switch (cmd) {
 514         case SIOCGMIIPHY:
 515                 data->phy_id = 0;
 516                 break;
 517
 518         case SIOCGMIIREG:
 519                 if (!capable(CAP_NET_ADMIN)) {
 520                         retval = -EPERM;
 521                         goto out;
 522                 }
 523                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 524                                     &data->val_out)) {
 525                         retval = -EIO;
 526                         goto out;
 527                 }
 528                 break;
 529
 530         case SIOCSMIIREG:
 531                 if (!capable(CAP_NET_ADMIN)) {
 532                         retval = -EPERM;
 533                         goto out;
 534                 }
 535                 if (data->reg_num & ~(0x1F)) {
 536                         retval = -EFAULT;
 537                         goto out;
 538                 }
 539
 540                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 541                                 data->reg_num, data->val_in);
 542                 if (atl1c_write_phy_reg(&adapter->hw,
 543                                      data->reg_num, data->val_in)) {
 544                         retval = -EIO;
 545                         goto out;
 546                 }
 547                 break;
 548
 549         default:
 550                 retval = -EOPNOTSUPP;
 551                 break;
 552         }
 553 out:
 554         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 555         return retval;
 556 }
 557
 558 /*
 559  * atl1c_ioctl -
 560  * @netdev:
 561  * @ifreq:
 562  * @cmd:
 563  */
 564 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 565 {
 566         switch (cmd) {
 567         case SIOCGMIIPHY:
 568         case SIOCGMIIREG:
 569         case SIOCSMIIREG:
 570                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 571         default:
 572                 return -EOPNOTSUPP;
 573         }
 574 }
 575
 576 /*
 577  * atl1c_alloc_queues - Allocate memory for all rings
 578  * @adapter: board private structure to initialize
 579  *
 580  */
 581 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 582 {
 583         return 0;
 584 }
 585
 586 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 587 {
 588         switch (hw->device_id) {
 589         case PCI_DEVICE_ID_ATTANSIC_L2C:
 590                 hw->nic_type = athr_l2c;
 591                 break;
 592
 593         case PCI_DEVICE_ID_ATTANSIC_L1C:
 594                 hw->nic_type = athr_l1c;
 595                 break;
 596
 597         default:
 598                 break;
 599         }
 600 }
 601
 602 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 603 {
 604         u32 phy_status_data;
 605         u32 link_ctrl_data;
 606
 607         atl1c_set_mac_type(hw);
 608         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 609         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 610
 611         hw->ctrl_flags = ATL1C_INTR_CLEAR_ON_READ |
 612                          ATL1C_INTR_MODRT_ENABLE  |
 613                          ATL1C_RX_IPV6_CHKSUM     |
 614                          ATL1C_TXQ_MODE_ENHANCE;
 615         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 616                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 617         if (link_ctrl_data & LINK_CTRL_L1_EN)
 618                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 619
 620         if (hw->nic_type == athr_l1c) {
 621                 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 622                 hw->ctrl_flags |= ATL1C_LINK_CAP_1000M;
 623         }
 624         return 0;
 625 }
 626 /*
 627  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 628  * @adapter: board private structure to initialize
 629  *
 630  * atl1c_sw_init initializes the Adapter private data structure.
 631  * Fields are initialized based on PCI device information and
 632  * OS network device settings (MTU size).
 633  */
 634 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 635 {
 636         struct atl1c_hw *hw   = &adapter->hw;
 637         struct pci_dev  *pdev = adapter->pdev;
 638
 639         adapter->wol = 0;
 640         adapter->link_speed = SPEED_0;
 641         adapter->link_duplex = FULL_DUPLEX;
 642         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
 643         adapter->tpd_ring[0].count = 1024;
 644         adapter->rfd_ring[0].count = 512;
 645
 646         hw->vendor_id = pdev->vendor;
 647         hw->device_id = pdev->device;
 648         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 649         hw->subsystem_id = pdev->subsystem_device;
 650
 651         /* before link up, we assume hibernate is true */
 652         hw->hibernate = true;
 653         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 654         if (atl1c_setup_mac_funcs(hw) != 0) {
 655                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 656                 return -1;
 657         }
 658         hw->intr_mask = IMR_NORMAL_MASK;
 659         hw->phy_configured = false;
 660         hw->preamble_len = 7;
 661         hw->max_frame_size = adapter->netdev->mtu;
 662         if (adapter->num_rx_queues < 2) {
 663                 hw->rss_type = atl1c_rss_disable;
 664                 hw->rss_mode = atl1c_rss_mode_disable;
 665         } else {
 666                 hw->rss_type = atl1c_rss_ipv4;
 667                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
 668                 hw->rss_hash_bits = 16;
 669         }
 670         hw->autoneg_advertised = ADVERTISED_Autoneg;
 671         hw->indirect_tab = 0xE4E4E4E4;
 672         hw->base_cpu = 0;
 673
 674         hw->ict = 50000;                /* 100ms */
 675         hw->smb_timer = 200000;         /* 400ms */
 676         hw->cmb_tpd = 4;
 677         hw->cmb_tx_timer = 1;           /* 2 us  */
 678         hw->rx_imt = 200;
 679         hw->tx_imt = 1000;
 680
 681         hw->tpd_burst = 5;
 682         hw->rfd_burst = 8;
 683         hw->dma_order = atl1c_dma_ord_out;
 684         hw->dmar_block = atl1c_dma_req_1024;
 685         hw->dmaw_block = atl1c_dma_req_1024;
 686         hw->dmar_dly_cnt = 15;
 687         hw->dmaw_dly_cnt = 4;
 688
 689         if (atl1c_alloc_queues(adapter)) {
 690                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 691                 return -ENOMEM;
 692         }
 693         /* TODO */
 694         atl1c_set_rxbufsize(adapter, adapter->netdev);
 695         atomic_set(&adapter->irq_sem, 1);
 696         spin_lock_init(&adapter->mdio_lock);
 697         spin_lock_init(&adapter->tx_lock);
 698         set_bit(__AT_DOWN, &adapter->flags);
 699
 700         return 0;
 701 }
 702
 703 /*
 704  * atl1c_clean_tx_ring - Free Tx-skb
 705  * @adapter: board private structure
 706  */
 707 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 708                                 enum atl1c_trans_queue type)
 709 {
 710         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 711         struct atl1c_buffer *buffer_info;
 712         struct pci_dev *pdev = adapter->pdev;
 713         u16 index, ring_count;
 714
 715         ring_count = tpd_ring->count;
 716         for (index = 0; index < ring_count; index++) {
 717                 buffer_info = &tpd_ring->buffer_info[index];
 718                 if (buffer_info->state == ATL1_BUFFER_FREE)
 719                         continue;
 720                 if (buffer_info->dma)
 721                         pci_unmap_single(pdev, buffer_info->dma,
 722                                         buffer_info->length,
 723                                         PCI_DMA_TODEVICE);
 724                 if (buffer_info->skb)
 725                         dev_kfree_skb(buffer_info->skb);
 726                 buffer_info->dma = 0;
 727                 buffer_info->skb = NULL;
 728                 buffer_info->state = ATL1_BUFFER_FREE;
 729         }
 730
 731         /* Zero out Tx-buffers */
 732         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 733                                 ring_count);
 734         atomic_set(&tpd_ring->next_to_clean, 0);
 735         tpd_ring->next_to_use = 0;
 736 }
 737
 738 /*
 739  * atl1c_clean_rx_ring - Free rx-reservation skbs
 740  * @adapter: board private structure
 741  */
 742 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 743 {
 744         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 745         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 746         struct atl1c_buffer *buffer_info;
 747         struct pci_dev *pdev = adapter->pdev;
 748         int i, j;
 749
 750         for (i = 0; i < adapter->num_rx_queues; i++) {
 751                 for (j = 0; j < rfd_ring[i].count; j++) {
 752                         buffer_info = &rfd_ring[i].buffer_info[j];
 753                         if (buffer_info->state == ATL1_BUFFER_FREE)
 754                                 continue;
 755                         if (buffer_info->dma)
 756                                 pci_unmap_single(pdev, buffer_info->dma,
 757                                                 buffer_info->length,
 758                                                 PCI_DMA_FROMDEVICE);
 759                         if (buffer_info->skb)
 760                                 dev_kfree_skb(buffer_info->skb);
 761                         buffer_info->state = ATL1_BUFFER_FREE;
 762                         buffer_info->skb = NULL;
 763                 }
 764                 /* zero out the descriptor ring */
 765                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
 766                 rfd_ring[i].next_to_clean = 0;
 767                 rfd_ring[i].next_to_use = 0;
 768                 rrd_ring[i].next_to_use = 0;
 769                 rrd_ring[i].next_to_clean = 0;
 770         }
 771 }
 772
 773 /*
 774  * Read / Write Ptr Initialize:
 775  */
 776 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 777 {
 778         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 779         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 780         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 781         struct atl1c_buffer *buffer_info;
 782         int i, j;
 783
 784         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 785                 tpd_ring[i].next_to_use = 0;
 786                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 787                 buffer_info = tpd_ring[i].buffer_info;
 788                 for (j = 0; j < tpd_ring->count; j++)
 789                         buffer_info[i].state = ATL1_BUFFER_FREE;
 790         }
 791         for (i = 0; i < adapter->num_rx_queues; i++) {
 792                 rfd_ring[i].next_to_use = 0;
 793                 rfd_ring[i].next_to_clean = 0;
 794                 rrd_ring[i].next_to_use = 0;
 795                 rrd_ring[i].next_to_clean = 0;
 796                 for (j = 0; j < rfd_ring[i].count; j++) {
 797                         buffer_info = &rfd_ring[i].buffer_info[j];
 798                         buffer_info->state = ATL1_BUFFER_FREE;
 799                 }
 800         }
 801 }
 802
 803 /*
 804  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 805  * @adapter: board private structure
 806  *
 807  * Free all transmit software resources
 808  */
 809 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 810 {
 811         struct pci_dev *pdev = adapter->pdev;
 812
 813         pci_free_consistent(pdev, adapter->ring_header.size,
 814                                         adapter->ring_header.desc,
 815                                         adapter->ring_header.dma);
 816         adapter->ring_header.desc = NULL;
 817
 818         /* Note: just free tdp_ring.buffer_info,
 819         *  it contain rfd_ring.buffer_info, do not double free */
 820         if (adapter->tpd_ring[0].buffer_info) {
 821                 kfree(adapter->tpd_ring[0].buffer_info);
 822                 adapter->tpd_ring[0].buffer_info = NULL;
 823         }
 824 }
 825
 826 /*
 827  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 828  * @adapter: board private structure
 829  *
 830  * Return 0 on success, negative on failure
 831  */
 832 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 833 {
 834         struct pci_dev *pdev = adapter->pdev;
 835         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 836         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 837         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 838         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 839         int num_rx_queues = adapter->num_rx_queues;
 840         int size;
 841         int i;
 842         int count = 0;
 843         int rx_desc_count = 0;
 844         u32 offset = 0;
 845
 846         rrd_ring[0].count = rfd_ring[0].count;
 847         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 848                 tpd_ring[i].count = tpd_ring[0].count;
 849
 850         for (i = 1; i < adapter->num_rx_queues; i++)
 851                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
 852
 853         /* 2 tpd queue, one high priority queue,
 854          * another normal priority queue */
 855         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 856                 rfd_ring->count * num_rx_queues);
 857         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 858         if (unlikely(!tpd_ring->buffer_info)) {
 859                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 860                         size);
 861                 goto err_nomem;
 862         }
 863         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 864                 tpd_ring[i].buffer_info =
 865                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 866                 count += tpd_ring[i].count;
 867         }
 868
 869         for (i = 0; i < num_rx_queues; i++) {
 870                 rfd_ring[i].buffer_info =
 871                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 872                 count += rfd_ring[i].count;
 873                 rx_desc_count += rfd_ring[i].count;
 874         }
 875         /*
 876          * real ring DMA buffer
 877          * each ring/block may need up to 8 bytes for alignment, hence the
 878          * additional bytes tacked onto the end.
 879          */
 880         ring_header->size = size =
 881                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 882                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 883                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 884                 sizeof(struct atl1c_hw_stats) +
 885                 8 * 4 + 8 * 2 * num_rx_queues;
 886
 887         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 888                                 &ring_header->dma);
 889         if (unlikely(!ring_header->desc)) {
 890                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 891                 goto err_nomem;
 892         }
 893         memset(ring_header->desc, 0, ring_header->size);
 894         /* init TPD ring */
 895
 896         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 897         offset = tpd_ring[0].dma - ring_header->dma;
 898         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 899                 tpd_ring[i].dma = ring_header->dma + offset;
 900                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 901                 tpd_ring[i].size =
 902                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 903                 offset += roundup(tpd_ring[i].size, 8);
 904         }
 905         /* init RFD ring */
 906         for (i = 0; i < num_rx_queues; i++) {
 907                 rfd_ring[i].dma = ring_header->dma + offset;
 908                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
 909                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
 910                                 rfd_ring[i].count;
 911                 offset += roundup(rfd_ring[i].size, 8);
 912         }
 913
 914         /* init RRD ring */
 915         for (i = 0; i < num_rx_queues; i++) {
 916                 rrd_ring[i].dma = ring_header->dma + offset;
 917                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
 918                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
 919                                 rrd_ring[i].count;
 920                 offset += roundup(rrd_ring[i].size, 8);
 921         }
 922
 923         adapter->smb.dma = ring_header->dma + offset;
 924         adapter->smb.smb = (u8 *)ring_header->desc + offset;
 925         return 0;
 926
 927 err_nomem:
 928         kfree(tpd_ring->buffer_info);
 929         return -ENOMEM;
 930 }
 931
 932 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
 933 {
 934         struct atl1c_hw *hw = &adapter->hw;
 935         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
 936                                 adapter->rfd_ring;
 937         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
 938                                 adapter->rrd_ring;
 939         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
 940                                 adapter->tpd_ring;
 941         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
 942         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
 943         int i;
 944
 945         /* TPD */
 946         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
 947                         (u32)((tpd_ring[atl1c_trans_normal].dma &
 948                                 AT_DMA_HI_ADDR_MASK) >> 32));
 949         /* just enable normal priority TX queue */
 950         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
 951                         (u32)(tpd_ring[atl1c_trans_normal].dma &
 952                                 AT_DMA_LO_ADDR_MASK));
 953         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
 954                         (u32)(tpd_ring[atl1c_trans_high].dma &
 955                                 AT_DMA_LO_ADDR_MASK));
 956         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
 957                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
 958
 959
 960         /* RFD */
 961         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
 962                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
 963         for (i = 0; i < adapter->num_rx_queues; i++)
 964                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
 965                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 966
 967         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
 968                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
 969         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
 970                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
 971
 972         /* RRD */
 973         for (i = 0; i < adapter->num_rx_queues; i++)
 974                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
 975                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 976         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
 977                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
 978
 979         /* CMB */
 980         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
 981
 982         /* SMB */
 983         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
 984                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
 985         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
 986                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
 987         /* Load all of base address above */
 988         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 989 }
 990
 991 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
 992 {
 993         struct atl1c_hw *hw = &adapter->hw;
 994         u32 dev_ctrl_data;
 995         u32 max_pay_load;
 996         u16 tx_offload_thresh;
 997         u32 txq_ctrl_data;
 998         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 999
1000         extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1001         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1002         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1003                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1004         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1005         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1006                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1007         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
1008         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1009                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1010         hw->dmar_block = min(max_pay_load, hw->dmar_block);
1011
1012         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1013                         TXQ_NUM_TPD_BURST_SHIFT;
1014         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1015                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1016         txq_ctrl_data |= (atl1c_pay_load_size[hw->dmar_block] &
1017                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1018
1019         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1020 }
1021
1022 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1023 {
1024         struct atl1c_hw *hw = &adapter->hw;
1025         u32 rxq_ctrl_data;
1026
1027         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1028                         RXQ_RFD_BURST_NUM_SHIFT;
1029
1030         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1031                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1032         if (hw->rss_type == atl1c_rss_ipv4)
1033                 rxq_ctrl_data |= RSS_HASH_IPV4;
1034         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1035                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1036         if (hw->rss_type == atl1c_rss_ipv6)
1037                 rxq_ctrl_data |= RSS_HASH_IPV6;
1038         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1039                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1040         if (hw->rss_type != atl1c_rss_disable)
1041                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1042
1043         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1044                         RSS_MODE_SHIFT;
1045         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1046                         RSS_HASH_BITS_SHIFT;
1047         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1048                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_100M &
1049                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1050
1051         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1052 }
1053
1054 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1055 {
1056         struct atl1c_hw *hw = &adapter->hw;
1057
1058         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1059         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1060 }
1061
1062 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1063 {
1064         struct atl1c_hw *hw = &adapter->hw;
1065         u32 dma_ctrl_data;
1066
1067         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1068         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1069                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1070         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1071                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1072         else
1073                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1074
1075         switch (hw->dma_order) {
1076         case atl1c_dma_ord_in:
1077                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1078                 break;
1079         case atl1c_dma_ord_enh:
1080                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1081                 break;
1082         case atl1c_dma_ord_out:
1083                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1084                 break;
1085         default:
1086                 break;
1087         }
1088
1089         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1090                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1091         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1092                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1093         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1094                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1095         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1096                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1097
1098         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1099 }
1100
1101 /*
1102  * Stop the mac, transmit and receive units
1103  * hw - Struct containing variables accessed by shared code
1104  * return : 0  or  idle status (if error)
1105  */
1106 static int atl1c_stop_mac(struct atl1c_hw *hw)
1107 {
1108         u32 data;
1109         int timeout;
1110
1111         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1112         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1113                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1114         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1115
1116         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1117         data &= ~TXQ_CTRL_EN;
1118         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1119
1120         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
1121                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
1122                 if ((data & (IDLE_STATUS_RXQ_NO_IDLE |
1123                         IDLE_STATUS_TXQ_NO_IDLE)) == 0)
1124                         break;
1125                 msleep(1);
1126         }
1127
1128         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1129         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1130         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1131
1132         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
1133                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
1134                 if ((data & IDLE_STATUS_MASK) == 0)
1135                         return 0;
1136                 msleep(1);
1137         }
1138         return data;
1139 }
1140
1141 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1142 {
1143         u32 data;
1144
1145         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1146         switch (hw->adapter->num_rx_queues) {
1147         case 4:
1148                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1149                 break;
1150         case 3:
1151                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1152                 break;
1153         case 2:
1154                 data |= RXQ1_CTRL_EN;
1155                 break;
1156         default:
1157                 break;
1158         }
1159         data |= RXQ_CTRL_EN;
1160         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1161 }
1162
1163 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1164 {
1165         u32 data;
1166
1167         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1168         data |= TXQ_CTRL_EN;
1169         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1170 }
1171
1172 /*
1173  * Reset the transmit and receive units; mask and clear all interrupts.
1174  * hw - Struct containing variables accessed by shared code
1175  * return : 0  or  idle status (if error)
1176  */
1177 static int atl1c_reset_mac(struct atl1c_hw *hw)
1178 {
1179         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1180         struct pci_dev *pdev = adapter->pdev;
1181         u32 idle_status_data = 0;
1182         int timeout = 0;
1183         int ret;
1184
1185         AT_WRITE_REG(hw, REG_IMR, 0);
1186         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1187
1188         ret = atl1c_stop_mac(hw);
1189         if (ret)
1190                 return ret;
1191         /*
1192          * Issue Soft Reset to the MAC.  This will reset the chip's
1193          * transmit, receive, DMA.  It will not effect
1194          * the current PCI configuration.  The global reset bit is self-
1195          * clearing, and should clear within a microsecond.
1196          */
1197         AT_WRITE_REGW(hw, REG_MASTER_CTRL, MASTER_CTRL_SOFT_RST);
1198         AT_WRITE_FLUSH(hw);
1199         msleep(10);
1200         /* Wait at least 10ms for All module to be Idle */
1201         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
1202                 AT_READ_REG(hw, REG_IDLE_STATUS, &idle_status_data);
1203                 if ((idle_status_data & IDLE_STATUS_MASK) == 0)
1204                         break;
1205                 msleep(1);
1206         }
1207         if (timeout >= AT_HW_MAX_IDLE_DELAY) {
1208                 dev_err(&pdev->dev,
1209                         "MAC state machine cann't be idle since"
1210                         " disabled for 10ms second\n");
1211                 return -1;
1212         }
1213         return 0;
1214 }
1215
1216 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1217 {
1218         u32 pm_ctrl_data;
1219
1220         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1221         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1222                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1223         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1224         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1225         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1226         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1227         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1228
1229         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1230         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1231         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1232         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1233 }
1234
1235 /*
1236  * Set ASPM state.
1237  * Enable/disable L0s/L1 depend on link state.
1238  */
1239 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1240 {
1241         u32 pm_ctrl_data;
1242
1243         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1244
1245         pm_ctrl_data &= PM_CTRL_SERDES_PD_EX_L1;
1246         pm_ctrl_data |= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1247         pm_ctrl_data |= ~PM_CTRL_SERDES_L1_EN;
1248         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1249                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1250
1251         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1252
1253         if (linkup) {
1254                 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1255                 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1256
1257                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT) {
1258                         pm_ctrl_data |= AT_ASPM_L1_TIMER <<
1259                                 PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1260                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1261                 } else
1262                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1263
1264                 if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1265                         pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN;
1266                 else
1267                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1268
1269         } else {
1270                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1271                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1272
1273                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1274
1275                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1276                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1277                 else
1278                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1279         }
1280
1281         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1282 }
1283
1284 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1285 {
1286         struct atl1c_hw *hw = &adapter->hw;
1287         struct net_device *netdev = adapter->netdev;
1288         u32 mac_ctrl_data;
1289
1290         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1291         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1292
1293         if (adapter->link_duplex == FULL_DUPLEX) {
1294                 hw->mac_duplex = true;
1295                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1296         }
1297
1298         if (adapter->link_speed == SPEED_1000)
1299                 hw->mac_speed = atl1c_mac_speed_1000;
1300         else
1301                 hw->mac_speed = atl1c_mac_speed_10_100;
1302
1303         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1304                         MAC_CTRL_SPEED_SHIFT;
1305
1306         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1307         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1308                         MAC_CTRL_PRMLEN_SHIFT);
1309
1310         if (adapter->vlgrp)
1311                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1312
1313         mac_ctrl_data |= MAC_CTRL_BC_EN;
1314         if (netdev->flags & IFF_PROMISC)
1315                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1316         if (netdev->flags & IFF_ALLMULTI)
1317                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1318
1319         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1320         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1321 }
1322
1323 /*
1324  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1325  * @adapter: board private structure
1326  *
1327  * Configure the Tx /Rx unit of the MAC after a reset.
1328  */
1329 static int atl1c_configure(struct atl1c_adapter *adapter)
1330 {
1331         struct atl1c_hw *hw = &adapter->hw;
1332         u32 master_ctrl_data = 0;
1333         u32 intr_modrt_data;
1334
1335         /* clear interrupt status */
1336         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1337         /*  Clear any WOL status */
1338         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1339         /* set Interrupt Clear Timer
1340          * HW will enable self to assert interrupt event to system after
1341          * waiting x-time for software to notify it accept interrupt.
1342          */
1343         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1344                 hw->ict & INT_RETRIG_TIMER_MASK);
1345
1346         atl1c_configure_des_ring(adapter);
1347
1348         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1349                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1350                                         IRQ_MODRT_TX_TIMER_SHIFT;
1351                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1352                                         IRQ_MODRT_RX_TIMER_SHIFT;
1353                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1354                 master_ctrl_data |=
1355                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1356         }
1357
1358         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1359                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1360
1361         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1362
1363         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1364                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1365                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1366                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1367                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1368         }
1369
1370         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1371                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1372                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1373         /* set MTU */
1374         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1375                         VLAN_HLEN + ETH_FCS_LEN);
1376         /* HDS, disable */
1377         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1378
1379         atl1c_configure_tx(adapter);
1380         atl1c_configure_rx(adapter);
1381         atl1c_configure_rss(adapter);
1382         atl1c_configure_dma(adapter);
1383
1384         return 0;
1385 }
1386
1387 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1388 {
1389         u16 hw_reg_addr = 0;
1390         unsigned long *stats_item = NULL;
1391         u32 data;
1392
1393         /* update rx status */
1394         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1395         stats_item  = &adapter->hw_stats.rx_ok;
1396         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1397                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1398                 *stats_item += data;
1399                 stats_item++;
1400                 hw_reg_addr += 4;
1401         }
1402 /* update tx status */
1403         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1404         stats_item  = &adapter->hw_stats.tx_ok;
1405         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1406                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1407                 *stats_item += data;
1408                 stats_item++;
1409                 hw_reg_addr += 4;
1410         }
1411 }
1412
1413 /*
1414  * atl1c_get_stats - Get System Network Statistics
1415  * @netdev: network interface device structure
1416  *
1417  * Returns the address of the device statistics structure.
1418  * The statistics are actually updated from the timer callback.
1419  */
1420 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1421 {
1422         struct atl1c_adapter *adapter = netdev_priv(netdev);
1423         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1424         struct net_device_stats *net_stats = &adapter->net_stats;
1425
1426         atl1c_update_hw_stats(adapter);
1427         net_stats->rx_packets = hw_stats->rx_ok;
1428         net_stats->tx_packets = hw_stats->tx_ok;
1429         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1430         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1431         net_stats->multicast  = hw_stats->rx_mcast;
1432         net_stats->collisions = hw_stats->tx_1_col +
1433                                 hw_stats->tx_2_col * 2 +
1434                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1435         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1436                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1437                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1438         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1439         net_stats->rx_length_errors = hw_stats->rx_len_err;
1440         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1441         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1442         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1443
1444         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1445
1446         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1447                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1448         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1449         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1450         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1451
1452         return &adapter->net_stats;
1453 }
1454
1455 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1456 {
1457         u16 phy_data;
1458
1459         spin_lock(&adapter->mdio_lock);
1460         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1461         spin_unlock(&adapter->mdio_lock);
1462 }
1463
1464 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1465                                 enum atl1c_trans_queue type)
1466 {
1467         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1468                                 &adapter->tpd_ring[type];
1469         struct atl1c_buffer *buffer_info;
1470         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1471         u16 hw_next_to_clean;
1472         u16 shift;
1473         u32 data;
1474
1475         if (type == atl1c_trans_high)
1476                 shift = MB_HTPD_CONS_IDX_SHIFT;
1477         else
1478                 shift = MB_NTPD_CONS_IDX_SHIFT;
1479
1480         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1481         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1482
1483         while (next_to_clean != hw_next_to_clean) {
1484                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1485                 if (buffer_info->state == ATL1_BUFFER_BUSY) {
1486                         pci_unmap_page(adapter->pdev, buffer_info->dma,
1487                                         buffer_info->length, PCI_DMA_TODEVICE);
1488                         buffer_info->dma = 0;
1489                         if (buffer_info->skb) {
1490                                 dev_kfree_skb_irq(buffer_info->skb);
1491                                 buffer_info->skb = NULL;
1492                         }
1493                         buffer_info->state = ATL1_BUFFER_FREE;
1494                 }
1495                 if (++next_to_clean == tpd_ring->count)
1496                         next_to_clean = 0;
1497                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1498         }
1499
1500         if (netif_queue_stopped(adapter->netdev) &&
1501                         netif_carrier_ok(adapter->netdev)) {
1502                 netif_wake_queue(adapter->netdev);
1503         }
1504
1505         return true;
1506 }
1507
1508 /*
1509  * atl1c_intr - Interrupt Handler
1510  * @irq: interrupt number
1511  * @data: pointer to a network interface device structure
1512  * @pt_regs: CPU registers structure
1513  */
1514 static irqreturn_t atl1c_intr(int irq, void *data)
1515 {
1516         struct net_device *netdev  = data;
1517         struct atl1c_adapter *adapter = netdev_priv(netdev);
1518         struct pci_dev *pdev = adapter->pdev;
1519         struct atl1c_hw *hw = &adapter->hw;
1520         int max_ints = AT_MAX_INT_WORK;
1521         int handled = IRQ_NONE;
1522         u32 status;
1523         u32 reg_data;
1524
1525         do {
1526                 AT_READ_REG(hw, REG_ISR, &reg_data);
1527                 status = reg_data & hw->intr_mask;
1528
1529                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1530                         if (max_ints != AT_MAX_INT_WORK)
1531                                 handled = IRQ_HANDLED;
1532                         break;
1533                 }
1534                 /* link event */
1535                 if (status & ISR_GPHY)
1536                         atl1c_clear_phy_int(adapter);
1537                 /* Ack ISR */
1538                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1539                 if (status & ISR_RX_PKT) {
1540                         if (likely(napi_schedule_prep(&adapter->napi))) {
1541                                 hw->intr_mask &= ~ISR_RX_PKT;
1542                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1543                                 __napi_schedule(&adapter->napi);
1544                         }
1545                 }
1546                 if (status & ISR_TX_PKT)
1547                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1548
1549                 handled = IRQ_HANDLED;
1550                 /* check if PCIE PHY Link down */
1551                 if (status & ISR_ERROR) {
1552                         if (netif_msg_hw(adapter))
1553                                 dev_err(&pdev->dev,
1554                                         "atl1c hardware error (status = 0x%x)\n",
1555                                         status & ISR_ERROR);
1556                         /* reset MAC */
1557                         hw->intr_mask &= ~ISR_ERROR;
1558                         AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1559                         schedule_work(&adapter->reset_task);
1560                         break;
1561                 }
1562
1563                 if (status & ISR_OVER)
1564                         if (netif_msg_intr(adapter))
1565                                 dev_warn(&pdev->dev,
1566                                         "TX/RX over flow (status = 0x%x)\n",
1567                                         status & ISR_OVER);
1568
1569                 /* link event */
1570                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1571                         adapter->net_stats.tx_carrier_errors++;
1572                         atl1c_link_chg_event(adapter);
1573                         break;
1574                 }
1575
1576         } while (--max_ints > 0);
1577         /* re-enable Interrupt*/
1578         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1579         return handled;
1580 }
1581
1582 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1583                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1584 {
1585         /*
1586          * The pid field in RRS in not correct sometimes, so we
1587          * cannot figure out if the packet is fragmented or not,
1588          * so we tell the KERNEL CHECKSUM_NONE
1589          */
1590         skb->ip_summed = CHECKSUM_NONE;
1591 }
1592
1593 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1594 {
1595         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1596         struct pci_dev *pdev = adapter->pdev;
1597         struct atl1c_buffer *buffer_info, *next_info;
1598         struct sk_buff *skb;
1599         void *vir_addr = NULL;
1600         u16 num_alloc = 0;
1601         u16 rfd_next_to_use, next_next;
1602         struct atl1c_rx_free_desc *rfd_desc;
1603
1604         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1605         if (++next_next == rfd_ring->count)
1606                 next_next = 0;
1607         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1608         next_info = &rfd_ring->buffer_info[next_next];
1609
1610         while (next_info->state == ATL1_BUFFER_FREE) {
1611                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1612
1613                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1614                 if (unlikely(!skb)) {
1615                         if (netif_msg_rx_err(adapter))
1616                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1617                         break;
1618                 }
1619
1620                 /*
1621                  * Make buffer alignment 2 beyond a 16 byte boundary
1622                  * this will result in a 16 byte aligned IP header after
1623                  * the 14 byte MAC header is removed
1624                  */
1625                 vir_addr = skb->data;
1626                 buffer_info->state = ATL1_BUFFER_BUSY;
1627                 buffer_info->skb = skb;
1628                 buffer_info->length = adapter->rx_buffer_len;
1629                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1630                                                 buffer_info->length,
1631                                                 PCI_DMA_FROMDEVICE);
1632                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1633                 rfd_next_to_use = next_next;
1634                 if (++next_next == rfd_ring->count)
1635                         next_next = 0;
1636                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1637                 next_info = &rfd_ring->buffer_info[next_next];
1638                 num_alloc++;
1639         }
1640
1641         if (num_alloc) {
1642                 /* TODO: update mailbox here */
1643                 wmb();
1644                 rfd_ring->next_to_use = rfd_next_to_use;
1645                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1646                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1647         }
1648
1649         return num_alloc;
1650 }
1651
1652 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1653                         struct  atl1c_recv_ret_status *rrs, u16 num)
1654 {
1655         u16 i;
1656         /* the relationship between rrd and rfd is one map one */
1657         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1658                                         rrd_ring->next_to_clean)) {
1659                 rrs->word3 &= ~RRS_RXD_UPDATED;
1660                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1661                         rrd_ring->next_to_clean = 0;
1662         }
1663 }
1664
1665 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1666         struct atl1c_recv_ret_status *rrs, u16 num)
1667 {
1668         u16 i;
1669         u16 rfd_index;
1670         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1671
1672         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1673                         RRS_RX_RFD_INDEX_MASK;
1674         for (i = 0; i < num; i++) {
1675                 buffer_info[rfd_index].skb = NULL;
1676                 buffer_info[rfd_index].state = ATL1_BUFFER_FREE;
1677                 if (++rfd_index == rfd_ring->count)
1678                         rfd_index = 0;
1679         }
1680         rfd_ring->next_to_clean = rfd_index;
1681 }
1682
1683 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1684                    int *work_done, int work_to_do)
1685 {
1686         u16 rfd_num, rfd_index;
1687         u16 count = 0;
1688         u16 length;
1689         struct pci_dev *pdev = adapter->pdev;
1690         struct net_device *netdev  = adapter->netdev;
1691         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1692         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1693         struct sk_buff *skb;
1694         struct atl1c_recv_ret_status *rrs;
1695         struct atl1c_buffer *buffer_info;
1696
1697         while (1) {
1698                 if (*work_done >= work_to_do)
1699                         break;
1700                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1701                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1702                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1703                                 RRS_RX_RFD_CNT_MASK;
1704                         if (unlikely(rfd_num) != 1)
1705                                 /* TODO support mul rfd*/
1706                                 if (netif_msg_rx_err(adapter))
1707                                         dev_warn(&pdev->dev,
1708                                                 "Multi rfd not support yet!\n");
1709                         goto rrs_checked;
1710                 } else {
1711                         break;
1712                 }
1713 rrs_checked:
1714                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1715                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1716                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1717                                 if (netif_msg_rx_err(adapter))
1718                                         dev_warn(&pdev->dev,
1719                                                 "wrong packet! rrs word3 is %x\n",
1720                                                 rrs->word3);
1721                         continue;
1722                 }
1723
1724                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1725                                 RRS_PKT_SIZE_MASK);
1726                 /* Good Receive */
1727                 if (likely(rfd_num == 1)) {
1728                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1729                                         RRS_RX_RFD_INDEX_MASK;
1730                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1731                         pci_unmap_single(pdev, buffer_info->dma,
1732                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1733                         skb = buffer_info->skb;
1734                 } else {
1735                         /* TODO */
1736                         if (netif_msg_rx_err(adapter))
1737                                 dev_warn(&pdev->dev,
1738                                         "Multi rfd not support yet!\n");
1739                         break;
1740                 }
1741                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1742                 skb_put(skb, length - ETH_FCS_LEN);
1743                 skb->protocol = eth_type_trans(skb, netdev);
1744                 skb->dev = netdev;
1745                 atl1c_rx_checksum(adapter, skb, rrs);
1746                 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1747                         u16 vlan;
1748
1749                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1750                         vlan = le16_to_cpu(vlan);
1751                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1752                 } else
1753                         netif_receive_skb(skb);
1754
1755                 netdev->last_rx = jiffies;
1756                 (*work_done)++;
1757                 count++;
1758         }
1759         if (count)
1760                 atl1c_alloc_rx_buffer(adapter, que);
1761 }
1762
1763 /*
1764  * atl1c_clean - NAPI Rx polling callback
1765  * @adapter: board private structure
1766  */
1767 static int atl1c_clean(struct napi_struct *napi, int budget)
1768 {
1769         struct atl1c_adapter *adapter =
1770                         container_of(napi, struct atl1c_adapter, napi);
1771         int work_done = 0;
1772
1773         /* Keep link state information with original netdev */
1774         if (!netif_carrier_ok(adapter->netdev))
1775                 goto quit_polling;
1776         /* just enable one RXQ */
1777         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1778
1779         if (work_done < budget) {
1780 quit_polling:
1781                 napi_complete(napi);
1782                 adapter->hw.intr_mask |= ISR_RX_PKT;
1783                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1784         }
1785         return work_done;
1786 }
1787
1788 #ifdef CONFIG_NET_POLL_CONTROLLER
1789
1790 /*
1791  * Polling 'interrupt' - used by things like netconsole to send skbs
1792  * without having to re-enable interrupts. It's not called while
1793  * the interrupt routine is executing.
1794  */
1795 static void atl1c_netpoll(struct net_device *netdev)
1796 {
1797         struct atl1c_adapter *adapter = netdev_priv(netdev);
1798
1799         disable_irq(adapter->pdev->irq);
1800         atl1c_intr(adapter->pdev->irq, netdev);
1801         enable_irq(adapter->pdev->irq);
1802 }
1803 #endif
1804
1805 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1806 {
1807         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1808         u16 next_to_use = 0;
1809         u16 next_to_clean = 0;
1810
1811         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1812         next_to_use   = tpd_ring->next_to_use;
1813
1814         return (u16)(next_to_clean > next_to_use) ?
1815                 (next_to_clean - next_to_use - 1) :
1816                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1817 }
1818
1819 /*
1820  * get next usable tpd
1821  * Note: should call atl1c_tdp_avail to make sure
1822  * there is enough tpd to use
1823  */
1824 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1825         enum atl1c_trans_queue type)
1826 {
1827         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1828         struct atl1c_tpd_desc *tpd_desc;
1829         u16 next_to_use = 0;
1830
1831         next_to_use = tpd_ring->next_to_use;
1832         if (++tpd_ring->next_to_use == tpd_ring->count)
1833                 tpd_ring->next_to_use = 0;
1834         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1835         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1836         return  tpd_desc;
1837 }
1838
1839 static struct atl1c_buffer *
1840 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1841 {
1842         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1843
1844         return &tpd_ring->buffer_info[tpd -
1845                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1846 }
1847
1848 /* Calculate the transmit packet descript needed*/
1849 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1850 {
1851         u16 tpd_req;
1852         u16 proto_hdr_len = 0;
1853
1854         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1855
1856         if (skb_is_gso(skb)) {
1857                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1858                 if (proto_hdr_len < skb_headlen(skb))
1859                         tpd_req++;
1860                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1861                         tpd_req++;
1862         }
1863         return tpd_req;
1864 }
1865
1866 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1867                           struct sk_buff *skb,
1868                           struct atl1c_tpd_desc **tpd,
1869                           enum atl1c_trans_queue type)
1870 {
1871         struct pci_dev *pdev = adapter->pdev;
1872         u8 hdr_len;
1873         u32 real_len;
1874         unsigned short offload_type;
1875         int err;
1876
1877         if (skb_is_gso(skb)) {
1878                 if (skb_header_cloned(skb)) {
1879                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1880                         if (unlikely(err))
1881                                 return -1;
1882                 }
1883                 offload_type = skb_shinfo(skb)->gso_type;
1884
1885                 if (offload_type & SKB_GSO_TCPV4) {
1886                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1887                                         + ntohs(ip_hdr(skb)->tot_len));
1888
1889                         if (real_len < skb->len)
1890                                 pskb_trim(skb, real_len);
1891
1892                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1893                         if (unlikely(skb->len == hdr_len)) {
1894                                 /* only xsum need */
1895                                 if (netif_msg_tx_queued(adapter))
1896                                         dev_warn(&pdev->dev,
1897                                                 "IPV4 tso with zero data??\n");
1898                                 goto check_sum;
1899                         } else {
1900                                 ip_hdr(skb)->check = 0;
1901                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1902                                                         ip_hdr(skb)->saddr,
1903                                                         ip_hdr(skb)->daddr,
1904                                                         0, IPPROTO_TCP, 0);
1905                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1906                         }
1907                 }
1908
1909                 if (offload_type & SKB_GSO_TCPV6) {
1910                         struct atl1c_tpd_ext_desc *etpd =
1911                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1912
1913                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1914                         *tpd = atl1c_get_tpd(adapter, type);
1915                         ipv6_hdr(skb)->payload_len = 0;
1916                         /* check payload == 0 byte ? */
1917                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1918                         if (unlikely(skb->len == hdr_len)) {
1919                                 /* only xsum need */
1920                                 if (netif_msg_tx_queued(adapter))
1921                                         dev_warn(&pdev->dev,
1922                                                 "IPV6 tso with zero data??\n");
1923                                 goto check_sum;
1924                         } else
1925                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1926                                                 &ipv6_hdr(skb)->saddr,
1927                                                 &ipv6_hdr(skb)->daddr,
1928                                                 0, IPPROTO_TCP, 0);
1929                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1930                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1931                         etpd->pkt_len = cpu_to_le32(skb->len);
1932                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1933                 }
1934
1935                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1936                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1937                                 TPD_TCPHDR_OFFSET_SHIFT;
1938                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1939                                 TPD_MSS_SHIFT;
1940                 return 0;
1941         }
1942
1943 check_sum:
1944         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1945                 u8 css, cso;
1946                 cso = skb_transport_offset(skb);
1947
1948                 if (unlikely(cso & 0x1)) {
1949                         if (netif_msg_tx_err(adapter))
1950                                 dev_err(&adapter->pdev->dev,
1951                                         "payload offset should not an event number\n");
1952                         return -1;
1953                 } else {
1954                         css = cso + skb->csum_offset;
1955
1956                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1957                                         TPD_PLOADOFFSET_SHIFT;
1958                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1959                                         TPD_CCSUM_OFFSET_SHIFT;
1960                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1961                 }
1962         }
1963         return 0;
1964 }
1965
1966 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1967                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1968                         enum atl1c_trans_queue type)
1969 {
1970         struct atl1c_tpd_desc *use_tpd = NULL;
1971         struct atl1c_buffer *buffer_info = NULL;
1972         u16 buf_len = skb_headlen(skb);
1973         u16 map_len = 0;
1974         u16 mapped_len = 0;
1975         u16 hdr_len = 0;
1976         u16 nr_frags;
1977         u16 f;
1978         int tso;
1979
1980         nr_frags = skb_shinfo(skb)->nr_frags;
1981         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
1982         if (tso) {
1983                 /* TSO */
1984                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1985                 use_tpd = tpd;
1986
1987                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1988                 buffer_info->length = map_len;
1989                 buffer_info->dma = pci_map_single(adapter->pdev,
1990                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1991                 buffer_info->state = ATL1_BUFFER_BUSY;
1992                 mapped_len += map_len;
1993                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1994                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1995         }
1996
1997         if (mapped_len < buf_len) {
1998                 /* mapped_len == 0, means we should use the first tpd,
1999                    which is given by caller  */
2000                 if (mapped_len == 0)
2001                         use_tpd = tpd;
2002                 else {
2003                         use_tpd = atl1c_get_tpd(adapter, type);
2004                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2005                         use_tpd = atl1c_get_tpd(adapter, type);
2006                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2007                 }
2008                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2009                 buffer_info->length = buf_len - mapped_len;
2010                 buffer_info->dma =
2011                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2012                                         buffer_info->length, PCI_DMA_TODEVICE);
2013                 buffer_info->state = ATL1_BUFFER_BUSY;
2014
2015                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2016                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2017         }
2018
2019         for (f = 0; f < nr_frags; f++) {
2020                 struct skb_frag_struct *frag;
2021
2022                 frag = &skb_shinfo(skb)->frags[f];
2023
2024                 use_tpd = atl1c_get_tpd(adapter, type);
2025                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2026
2027                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2028                 buffer_info->length = frag->size;
2029                 buffer_info->dma =
2030                         pci_map_page(adapter->pdev, frag->page,
2031                                         frag->page_offset,
2032                                         buffer_info->length,
2033                                         PCI_DMA_TODEVICE);
2034                 buffer_info->state = ATL1_BUFFER_BUSY;
2035
2036                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2037                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2038         }
2039
2040         /* The last tpd */
2041         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2042         /* The last buffer info contain the skb address,
2043            so it will be free after unmap */
2044         buffer_info->skb = skb;
2045 }
2046
2047 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2048                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2049 {
2050         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2051         u32 prod_data;
2052
2053         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2054         switch (type) {
2055         case atl1c_trans_high:
2056                 prod_data &= 0xFFFF0000;
2057                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2058                 break;
2059         case atl1c_trans_normal:
2060                 prod_data &= 0x0000FFFF;
2061                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2062                 break;
2063         default:
2064                 break;
2065         }
2066         wmb();
2067         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2068 }
2069
2070 static int atl1c_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2071 {
2072         struct atl1c_adapter *adapter = netdev_priv(netdev);
2073         unsigned long flags;
2074         u16 tpd_req = 1;
2075         struct atl1c_tpd_desc *tpd;
2076         enum atl1c_trans_queue type = atl1c_trans_normal;
2077
2078         if (test_bit(__AT_DOWN, &adapter->flags)) {
2079                 dev_kfree_skb_any(skb);
2080                 return NETDEV_TX_OK;
2081         }
2082
2083         tpd_req = atl1c_cal_tpd_req(skb);
2084         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2085                 if (netif_msg_pktdata(adapter))
2086                         dev_info(&adapter->pdev->dev, "tx locked\n");
2087                 return NETDEV_TX_LOCKED;
2088         }
2089         if (skb->mark == 0x01)
2090                 type = atl1c_trans_high;
2091         else
2092                 type = atl1c_trans_normal;
2093
2094         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2095                 /* no enough descriptor, just stop queue */
2096                 netif_stop_queue(netdev);
2097                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2098                 return NETDEV_TX_BUSY;
2099         }
2100
2101         tpd = atl1c_get_tpd(adapter, type);
2102
2103         /* do TSO and check sum */
2104         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2105                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2106                 dev_kfree_skb_any(skb);
2107                 return NETDEV_TX_OK;
2108         }
2109
2110         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2111                 u16 vlan = vlan_tx_tag_get(skb);
2112                 __le16 tag;
2113
2114                 vlan = cpu_to_le16(vlan);
2115                 AT_VLAN_TO_TAG(vlan, tag);
2116                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2117                 tpd->vlan_tag = tag;
2118         }
2119
2120         if (skb_network_offset(skb) != ETH_HLEN)
2121                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2122
2123         atl1c_tx_map(adapter, skb, tpd, type);
2124         atl1c_tx_queue(adapter, skb, tpd, type);
2125
2126         netdev->trans_start = jiffies;
2127         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2128         return NETDEV_TX_OK;
2129 }
2130
2131 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2132 {
2133         struct net_device *netdev = adapter->netdev;
2134
2135         free_irq(adapter->pdev->irq, netdev);
2136
2137         if (adapter->have_msi)
2138                 pci_disable_msi(adapter->pdev);
2139 }
2140
2141 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2142 {
2143         struct pci_dev    *pdev   = adapter->pdev;
2144         struct net_device *netdev = adapter->netdev;
2145         int flags = 0;
2146         int err = 0;
2147
2148         adapter->have_msi = true;
2149         err = pci_enable_msi(adapter->pdev);
2150         if (err) {
2151                 if (netif_msg_ifup(adapter))
2152                         dev_err(&pdev->dev,
2153                                 "Unable to allocate MSI interrupt Error: %d\n",
2154                                 err);
2155                 adapter->have_msi = false;
2156         } else
2157                 netdev->irq = pdev->irq;
2158
2159         if (!adapter->have_msi)
2160                 flags |= IRQF_SHARED;
2161         err = request_irq(adapter->pdev->irq, &atl1c_intr, flags,
2162                         netdev->name, netdev);
2163         if (err) {
2164                 if (netif_msg_ifup(adapter))
2165                         dev_err(&pdev->dev,
2166                                 "Unable to allocate interrupt Error: %d\n",
2167                                 err);
2168                 if (adapter->have_msi)
2169                         pci_disable_msi(adapter->pdev);
2170                 return err;
2171         }
2172         if (netif_msg_ifup(adapter))
2173                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2174         return err;
2175 }
2176
2177 int atl1c_up(struct atl1c_adapter *adapter)
2178 {
2179         struct net_device *netdev = adapter->netdev;
2180         int num;
2181         int err;
2182         int i;
2183
2184         netif_carrier_off(netdev);
2185         atl1c_init_ring_ptrs(adapter);
2186         atl1c_set_multi(netdev);
2187         atl1c_restore_vlan(adapter);
2188
2189         for (i = 0; i < adapter->num_rx_queues; i++) {
2190                 num = atl1c_alloc_rx_buffer(adapter, i);
2191                 if (unlikely(num == 0)) {
2192                         err = -ENOMEM;
2193                         goto err_alloc_rx;
2194                 }
2195         }
2196
2197         if (atl1c_configure(adapter)) {
2198                 err = -EIO;
2199                 goto err_up;
2200         }
2201
2202         err = atl1c_request_irq(adapter);
2203         if (unlikely(err))
2204                 goto err_up;
2205
2206         clear_bit(__AT_DOWN, &adapter->flags);
2207         napi_enable(&adapter->napi);
2208         atl1c_irq_enable(adapter);
2209         atl1c_check_link_status(adapter);
2210         netif_start_queue(netdev);
2211         return err;
2212
2213 err_up:
2214 err_alloc_rx:
2215         atl1c_clean_rx_ring(adapter);
2216         return err;
2217 }
2218
2219 void atl1c_down(struct atl1c_adapter *adapter)
2220 {
2221         struct net_device *netdev = adapter->netdev;
2222
2223         atl1c_del_timer(adapter);
2224         atl1c_cancel_work(adapter);
2225
2226         /* signal that we're down so the interrupt handler does not
2227          * reschedule our watchdog timer */
2228         set_bit(__AT_DOWN, &adapter->flags);
2229         netif_carrier_off(netdev);
2230         napi_disable(&adapter->napi);
2231         atl1c_irq_disable(adapter);
2232         atl1c_free_irq(adapter);
2233         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
2234         /* reset MAC to disable all RX/TX */
2235         atl1c_reset_mac(&adapter->hw);
2236         msleep(1);
2237
2238         adapter->link_speed = SPEED_0;
2239         adapter->link_duplex = -1;
2240         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2241         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2242         atl1c_clean_rx_ring(adapter);
2243 }
2244
2245 /*
2246  * atl1c_open - Called when a network interface is made active
2247  * @netdev: network interface device structure
2248  *
2249  * Returns 0 on success, negative value on failure
2250  *
2251  * The open entry point is called when a network interface is made
2252  * active by the system (IFF_UP).  At this point all resources needed
2253  * for transmit and receive operations are allocated, the interrupt
2254  * handler is registered with the OS, the watchdog timer is started,
2255  * and the stack is notified that the interface is ready.
2256  */
2257 static int atl1c_open(struct net_device *netdev)
2258 {
2259         struct atl1c_adapter *adapter = netdev_priv(netdev);
2260         int err;
2261
2262         /* disallow open during test */
2263         if (test_bit(__AT_TESTING, &adapter->flags))
2264                 return -EBUSY;
2265
2266         /* allocate rx/tx dma buffer & descriptors */
2267         err = atl1c_setup_ring_resources(adapter);
2268         if (unlikely(err))
2269                 return err;
2270
2271         err = atl1c_up(adapter);
2272         if (unlikely(err))
2273                 goto err_up;
2274
2275         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2276                 u32 phy_data;
2277
2278                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2279                 phy_data |= MDIO_AP_EN;
2280                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2281         }
2282         return 0;
2283
2284 err_up:
2285         atl1c_free_irq(adapter);
2286         atl1c_free_ring_resources(adapter);
2287         atl1c_reset_mac(&adapter->hw);
2288         return err;
2289 }
2290
2291 /*
2292  * atl1c_close - Disables a network interface
2293  * @netdev: network interface device structure
2294  *
2295  * Returns 0, this is not allowed to fail
2296  *
2297  * The close entry point is called when an interface is de-activated
2298  * by the OS.  The hardware is still under the drivers control, but
2299  * needs to be disabled.  A global MAC reset is issued to stop the
2300  * hardware, and all transmit and receive resources are freed.
2301  */
2302 static int atl1c_close(struct net_device *netdev)
2303 {
2304         struct atl1c_adapter *adapter = netdev_priv(netdev);
2305
2306         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2307         atl1c_down(adapter);
2308         atl1c_free_ring_resources(adapter);
2309         return 0;
2310 }
2311
2312 static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2313 {
2314         struct net_device *netdev = pci_get_drvdata(pdev);
2315         struct atl1c_adapter *adapter = netdev_priv(netdev);
2316         struct atl1c_hw *hw = &adapter->hw;
2317         u32 ctrl;
2318         u32 mac_ctrl_data;
2319         u32 master_ctrl_data;
2320         u32 wol_ctrl_data;
2321         u16 mii_bmsr_data;
2322         u16 save_autoneg_advertised;
2323         u16 mii_intr_status_data;
2324         u32 wufc = adapter->wol;
2325         u32 i;
2326         int retval = 0;
2327
2328         if (netif_running(netdev)) {
2329                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2330                 atl1c_down(adapter);
2331         }
2332         netif_device_detach(netdev);
2333         atl1c_disable_l0s_l1(hw);
2334         retval = pci_save_state(pdev);
2335         if (retval)
2336                 return retval;
2337         if (wufc) {
2338                 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2339                 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2340
2341                 /* get link status */
2342                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2343                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2344                 save_autoneg_advertised = hw->autoneg_advertised;
2345                 hw->autoneg_advertised = ADVERTISED_10baseT_Half;
2346                 if (atl1c_restart_autoneg(hw) != 0)
2347                         if (netif_msg_link(adapter))
2348                                 dev_warn(&pdev->dev, "phy autoneg failed\n");
2349                 hw->phy_configured = false; /* re-init PHY when resume */
2350                 hw->autoneg_advertised = save_autoneg_advertised;
2351                 /* turn on magic packet wol */
2352                 if (wufc & AT_WUFC_MAG)
2353                         wol_ctrl_data = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2354
2355                 if (wufc & AT_WUFC_LNKC) {
2356                         for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2357                                 msleep(100);
2358                                 atl1c_read_phy_reg(hw, MII_BMSR,
2359                                         (u16 *)&mii_bmsr_data);
2360                                 if (mii_bmsr_data & BMSR_LSTATUS)
2361                                         break;
2362                         }
2363                         if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2364                                 if (netif_msg_link(adapter))
2365                                         dev_warn(&pdev->dev,
2366                                                 "%s: Link may change"
2367                                                 "when suspend\n",
2368                                                 atl1c_driver_name);
2369                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2370                         /* only link up can wake up */
2371                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2372                                 if (netif_msg_link(adapter))
2373                                         dev_err(&pdev->dev,
2374                                                 "%s: read write phy "
2375                                                 "register failed.\n",
2376                                                 atl1c_driver_name);
2377                                 goto wol_dis;
2378                         }
2379                 }
2380                 /* clear phy interrupt */
2381                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2382                 /* Config MAC Ctrl register */
2383                 mac_ctrl_data = MAC_CTRL_RX_EN;
2384                 /* set to 10/100M halt duplex */
2385                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2386                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2387                                  MAC_CTRL_PRMLEN_MASK) <<
2388                                  MAC_CTRL_PRMLEN_SHIFT);
2389
2390                 if (adapter->vlgrp)
2391                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2392
2393                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2394                 if (wufc & AT_WUFC_MAG)
2395                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2396
2397                 if (netif_msg_hw(adapter))
2398                         dev_dbg(&pdev->dev,
2399                                 "%s: suspend MAC=0x%x\n",
2400                                 atl1c_driver_name, mac_ctrl_data);
2401                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2402                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2403                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2404
2405                 /* pcie patch */
2406                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2407                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2408                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2409
2410                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2411                 goto suspend_exit;
2412         }
2413 wol_dis:
2414
2415         /* WOL disabled */
2416         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2417
2418         /* pcie patch */
2419         AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2420         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2421         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2422
2423         atl1c_phy_disable(hw);
2424         hw->phy_configured = false; /* re-init PHY when resume */
2425
2426         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2427 suspend_exit:
2428
2429         pci_disable_device(pdev);
2430         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2431
2432         return 0;
2433 }
2434
2435 static int atl1c_resume(struct pci_dev *pdev)
2436 {
2437         struct net_device *netdev = pci_get_drvdata(pdev);
2438         struct atl1c_adapter *adapter = netdev_priv(netdev);
2439
2440         pci_set_power_state(pdev, PCI_D0);
2441         pci_restore_state(pdev);
2442         pci_enable_wake(pdev, PCI_D3hot, 0);
2443         pci_enable_wake(pdev, PCI_D3cold, 0);
2444
2445         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2446
2447         atl1c_phy_reset(&adapter->hw);
2448         atl1c_reset_mac(&adapter->hw);
2449         netif_device_attach(netdev);
2450         if (netif_running(netdev))
2451                 atl1c_up(adapter);
2452
2453         return 0;
2454 }
2455
2456 static void atl1c_shutdown(struct pci_dev *pdev)
2457 {
2458         atl1c_suspend(pdev, PMSG_SUSPEND);
2459 }
2460
2461 static const struct net_device_ops atl1c_netdev_ops = {
2462         .ndo_open               = atl1c_open,
2463         .ndo_stop               = atl1c_close,
2464         .ndo_validate_addr      = eth_validate_addr,
2465         .ndo_start_xmit         = atl1c_xmit_frame,
2466         .ndo_set_mac_address    = atl1c_set_mac_addr,
2467         .ndo_set_multicast_list = atl1c_set_multi,
2468         .ndo_change_mtu         = atl1c_change_mtu,
2469         .ndo_do_ioctl           = atl1c_ioctl,
2470         .ndo_tx_timeout         = atl1c_tx_timeout,
2471         .ndo_get_stats          = atl1c_get_stats,
2472         .ndo_vlan_rx_register   = atl1c_vlan_rx_register,
2473 #ifdef CONFIG_NET_POLL_CONTROLLER
2474         .ndo_poll_controller    = atl1c_netpoll,
2475 #endif
2476 };
2477
2478 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2479 {
2480         SET_NETDEV_DEV(netdev, &pdev->dev);
2481         pci_set_drvdata(pdev, netdev);
2482
2483         netdev->irq  = pdev->irq;
2484         netdev->netdev_ops = &atl1c_netdev_ops;
2485         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2486         atl1c_set_ethtool_ops(netdev);
2487
2488         /* TODO: add when ready */
2489         netdev->features =      NETIF_F_SG         |
2490                                 NETIF_F_HW_CSUM    |
2491                                 NETIF_F_HW_VLAN_TX |
2492                                 NETIF_F_HW_VLAN_RX |
2493                                 NETIF_F_TSO        |
2494                                 NETIF_F_TSO6;
2495         return 0;
2496 }
2497
2498 /*
2499  * atl1c_probe - Device Initialization Routine
2500  * @pdev: PCI device information struct
2501  * @ent: entry in atl1c_pci_tbl
2502  *
2503  * Returns 0 on success, negative on failure
2504  *
2505  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2506  * The OS initialization, configuring of the adapter private structure,
2507  * and a hardware reset occur.
2508  */
2509 static int __devinit atl1c_probe(struct pci_dev *pdev,
2510                                  const struct pci_device_id *ent)
2511 {
2512         struct net_device *netdev;
2513         struct atl1c_adapter *adapter;
2514         static int cards_found;
2515
2516         int err = 0;
2517
2518         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2519         err = pci_enable_device_mem(pdev);
2520         if (err) {
2521                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2522                 return err;
2523         }
2524
2525         /*
2526          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2527          * shared register for the high 32 bits, so only a single, aligned,
2528          * 4 GB physical address range can be used at a time.
2529          *
2530          * Supporting 64-bit DMA on this hardware is more trouble than it's
2531          * worth.  It is far easier to limit to 32-bit DMA than update
2532          * various kernel subsystems to support the mechanics required by a
2533          * fixed-high-32-bit system.
2534          */
2535         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2536             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2537                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2538                 goto err_dma;
2539         }
2540
2541         err = pci_request_regions(pdev, atl1c_driver_name);
2542         if (err) {
2543                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2544                 goto err_pci_reg;
2545         }
2546
2547         pci_set_master(pdev);
2548
2549         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2550         if (netdev == NULL) {
2551                 err = -ENOMEM;
2552                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2553                 goto err_alloc_etherdev;
2554         }
2555
2556         err = atl1c_init_netdev(netdev, pdev);
2557         if (err) {
2558                 dev_err(&pdev->dev, "init netdevice failed\n");
2559                 goto err_init_netdev;
2560         }
2561         adapter = netdev_priv(netdev);
2562         adapter->bd_number = cards_found;
2563         adapter->netdev = netdev;
2564         adapter->pdev = pdev;
2565         adapter->hw.adapter = adapter;
2566         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2567         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2568         if (!adapter->hw.hw_addr) {
2569                 err = -EIO;
2570                 dev_err(&pdev->dev, "cannot map device registers\n");
2571                 goto err_ioremap;
2572         }
2573         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2574
2575         /* init mii data */
2576         adapter->mii.dev = netdev;
2577         adapter->mii.mdio_read  = atl1c_mdio_read;
2578         adapter->mii.mdio_write = atl1c_mdio_write;
2579         adapter->mii.phy_id_mask = 0x1f;
2580         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2581         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2582         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2583                         (unsigned long)adapter);
2584         /* setup the private structure */
2585         err = atl1c_sw_init(adapter);
2586         if (err) {
2587                 dev_err(&pdev->dev, "net device private data init failed\n");
2588                 goto err_sw_init;
2589         }
2590         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2591                         ATL1C_PCIE_PHY_RESET);
2592
2593         /* Init GPHY as early as possible due to power saving issue  */
2594         atl1c_phy_reset(&adapter->hw);
2595
2596         err = atl1c_reset_mac(&adapter->hw);
2597         if (err) {
2598                 err = -EIO;
2599                 goto err_reset;
2600         }
2601
2602         device_init_wakeup(&pdev->dev, 1);
2603         /* reset the controller to
2604          * put the device in a known good starting state */
2605         err = atl1c_phy_init(&adapter->hw);
2606         if (err) {
2607                 err = -EIO;
2608                 goto err_reset;
2609         }
2610         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2611                 err = -EIO;
2612                 dev_err(&pdev->dev, "get mac address failed\n");
2613                 goto err_eeprom;
2614         }
2615         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2616         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2617         if (netif_msg_probe(adapter))
2618                 dev_dbg(&pdev->dev,
2619                         "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2620                         adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2621                         adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2622                         adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2623
2624         atl1c_hw_set_mac_addr(&adapter->hw);
2625         INIT_WORK(&adapter->reset_task, atl1c_reset_task);
2626         INIT_WORK(&adapter->link_chg_task, atl1c_link_chg_task);
2627         err = register_netdev(netdev);
2628         if (err) {
2629                 dev_err(&pdev->dev, "register netdevice failed\n");
2630                 goto err_register;
2631         }
2632
2633         if (netif_msg_probe(adapter))
2634                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2635         cards_found++;
2636         return 0;
2637
2638 err_reset:
2639 err_register:
2640 err_sw_init:
2641 err_eeprom:
2642         iounmap(adapter->hw.hw_addr);
2643 err_init_netdev:
2644 err_ioremap:
2645         free_netdev(netdev);
2646 err_alloc_etherdev:
2647         pci_release_regions(pdev);
2648 err_pci_reg:
2649 err_dma:
2650         pci_disable_device(pdev);
2651         return err;
2652 }
2653
2654 /*
2655  * atl1c_remove - Device Removal Routine
2656  * @pdev: PCI device information struct
2657  *
2658  * atl1c_remove is called by the PCI subsystem to alert the driver
2659  * that it should release a PCI device.  The could be caused by a
2660  * Hot-Plug event, or because the driver is going to be removed from
2661  * memory.
2662  */
2663 static void __devexit atl1c_remove(struct pci_dev *pdev)
2664 {
2665         struct net_device *netdev = pci_get_drvdata(pdev);
2666         struct atl1c_adapter *adapter = netdev_priv(netdev);
2667
2668         unregister_netdev(netdev);
2669         atl1c_phy_disable(&adapter->hw);
2670
2671         iounmap(adapter->hw.hw_addr);
2672
2673         pci_release_regions(pdev);
2674         pci_disable_device(pdev);
2675         free_netdev(netdev);
2676 }
2677
2678 /*
2679  * atl1c_io_error_detected - called when PCI error is detected
2680  * @pdev: Pointer to PCI device
2681  * @state: The current pci connection state
2682  *
2683  * This function is called after a PCI bus error affecting
2684  * this device has been detected.
2685  */
2686 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2687                                                 pci_channel_state_t state)
2688 {
2689         struct net_device *netdev = pci_get_drvdata(pdev);
2690         struct atl1c_adapter *adapter = netdev_priv(netdev);
2691
2692         netif_device_detach(netdev);
2693
2694         if (netif_running(netdev))
2695                 atl1c_down(adapter);
2696
2697         pci_disable_device(pdev);
2698
2699         /* Request a slot slot reset. */
2700         return PCI_ERS_RESULT_NEED_RESET;
2701 }
2702
2703 /*
2704  * atl1c_io_slot_reset - called after the pci bus has been reset.
2705  * @pdev: Pointer to PCI device
2706  *
2707  * Restart the card from scratch, as if from a cold-boot. Implementation
2708  * resembles the first-half of the e1000_resume routine.
2709  */
2710 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2711 {
2712         struct net_device *netdev = pci_get_drvdata(pdev);
2713         struct atl1c_adapter *adapter = netdev_priv(netdev);
2714
2715         if (pci_enable_device(pdev)) {
2716                 if (netif_msg_hw(adapter))
2717                         dev_err(&pdev->dev,
2718                                 "Cannot re-enable PCI device after reset\n");
2719                 return PCI_ERS_RESULT_DISCONNECT;
2720         }
2721         pci_set_master(pdev);
2722
2723         pci_enable_wake(pdev, PCI_D3hot, 0);
2724         pci_enable_wake(pdev, PCI_D3cold, 0);
2725
2726         atl1c_reset_mac(&adapter->hw);
2727
2728         return PCI_ERS_RESULT_RECOVERED;
2729 }
2730
2731 /*
2732  * atl1c_io_resume - called when traffic can start flowing again.
2733  * @pdev: Pointer to PCI device
2734  *
2735  * This callback is called when the error recovery driver tells us that
2736  * its OK to resume normal operation. Implementation resembles the
2737  * second-half of the atl1c_resume routine.
2738  */
2739 static void atl1c_io_resume(struct pci_dev *pdev)
2740 {
2741         struct net_device *netdev = pci_get_drvdata(pdev);
2742         struct atl1c_adapter *adapter = netdev_priv(netdev);
2743
2744         if (netif_running(netdev)) {
2745                 if (atl1c_up(adapter)) {
2746                         if (netif_msg_hw(adapter))
2747                                 dev_err(&pdev->dev,
2748                                         "Cannot bring device back up after reset\n");
2749                         return;
2750                 }
2751         }
2752
2753         netif_device_attach(netdev);
2754 }
2755
2756 static struct pci_error_handlers atl1c_err_handler = {
2757         .error_detected = atl1c_io_error_detected,
2758         .slot_reset = atl1c_io_slot_reset,
2759         .resume = atl1c_io_resume,
2760 };
2761
2762 static struct pci_driver atl1c_driver = {
2763         .name     = atl1c_driver_name,
2764         .id_table = atl1c_pci_tbl,
2765         .probe    = atl1c_probe,
2766         .remove   = __devexit_p(atl1c_remove),
2767         /* Power Managment Hooks */
2768         .suspend  = atl1c_suspend,
2769         .resume   = atl1c_resume,
2770         .shutdown = atl1c_shutdown,
2771         .err_handler = &atl1c_err_handler
2772 };
2773
2774 /*
2775  * atl1c_init_module - Driver Registration Routine
2776  *
2777  * atl1c_init_module is the first routine called when the driver is
2778  * loaded. All it does is register with the PCI subsystem.
2779  */
2780 static int __init atl1c_init_module(void)
2781 {
2782         return pci_register_driver(&atl1c_driver);
2783 }
2784
2785 /*
2786  * atl1c_exit_module - Driver Exit Cleanup Routine
2787  *
2788  * atl1c_exit_module is called just before the driver is removed
2789  * from memory.
2790  */
2791 static void __exit atl1c_exit_module(void)
2792 {
2793         pci_unregister_driver(&atl1c_driver);
2794 }
2795
2796 module_init(atl1c_init_module);
2797 module_exit(atl1c_exit_module);