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_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 168  * of the idle status register until the device is actually idle
 169  */
 170 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
 171 {
 172         int timeout;
 173         u32 data;
 174
 175         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 176                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 177                 if ((data & IDLE_STATUS_MASK) == 0)
 178                         return 0;
 179                 msleep(1);
 180         }
 181         return data;
 182 }
 183
 184 /*
 185  * atl1c_phy_config - Timer Call-back
 186  * @data: pointer to netdev cast into an unsigned long
 187  */
 188 static void atl1c_phy_config(unsigned long data)
 189 {
 190         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 191         struct atl1c_hw *hw = &adapter->hw;
 192         unsigned long flags;
 193
 194         spin_lock_irqsave(&adapter->mdio_lock, flags);
 195         atl1c_restart_autoneg(hw);
 196         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 197 }
 198
 199 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 200 {
 201
 202         WARN_ON(in_interrupt());
 203         atl1c_down(adapter);
 204         atl1c_up(adapter);
 205         clear_bit(__AT_RESETTING, &adapter->flags);
 206 }
 207
 208 static void atl1c_reset_task(struct work_struct *work)
 209 {
 210         struct atl1c_adapter *adapter;
 211         struct net_device *netdev;
 212
 213         adapter = container_of(work, struct atl1c_adapter, reset_task);
 214         netdev = adapter->netdev;
 215
 216         netif_device_detach(netdev);
 217         atl1c_down(adapter);
 218         atl1c_up(adapter);
 219         netif_device_attach(netdev);
 220 }
 221
 222 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 223 {
 224         struct atl1c_hw *hw = &adapter->hw;
 225         struct net_device *netdev = adapter->netdev;
 226         struct pci_dev    *pdev   = adapter->pdev;
 227         int err;
 228         unsigned long flags;
 229         u16 speed, duplex, phy_data;
 230
 231         spin_lock_irqsave(&adapter->mdio_lock, flags);
 232         /* MII_BMSR must read twise */
 233         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 234         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 235         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 236
 237         if ((phy_data & BMSR_LSTATUS) == 0) {
 238                 /* link down */
 239                 if (netif_carrier_ok(netdev)) {
 240                         hw->hibernate = true;
 241                         if (atl1c_stop_mac(hw) != 0)
 242                                 if (netif_msg_hw(adapter))
 243                                         dev_warn(&pdev->dev,
 244                                                 "stop mac failed\n");
 245                         atl1c_set_aspm(hw, false);
 246                 }
 247                 netif_carrier_off(netdev);
 248         } else {
 249                 /* Link Up */
 250                 hw->hibernate = false;
 251                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 252                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 253                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 254                 if (unlikely(err))
 255                         return;
 256                 /* link result is our setting */
 257                 if (adapter->link_speed != speed ||
 258                     adapter->link_duplex != duplex) {
 259                         adapter->link_speed  = speed;
 260                         adapter->link_duplex = duplex;
 261                         atl1c_set_aspm(hw, true);
 262                         atl1c_enable_tx_ctrl(hw);
 263                         atl1c_enable_rx_ctrl(hw);
 264                         atl1c_setup_mac_ctrl(adapter);
 265                         if (netif_msg_link(adapter))
 266                                 dev_info(&pdev->dev,
 267                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 268                                         atl1c_driver_name, netdev->name,
 269                                         adapter->link_speed,
 270                                         adapter->link_duplex == FULL_DUPLEX ?
 271                                         "Full Duplex" : "Half Duplex");
 272                 }
 273                 if (!netif_carrier_ok(netdev))
 274                         netif_carrier_on(netdev);
 275         }
 276 }
 277
 278 /*
 279  * atl1c_link_chg_task - deal with link change event Out of interrupt context
 280  * @netdev: network interface device structure
 281  */
 282 static void atl1c_link_chg_task(struct work_struct *work)
 283 {
 284         struct atl1c_adapter *adapter;
 285
 286         adapter = container_of(work, struct atl1c_adapter, link_chg_task);
 287         atl1c_check_link_status(adapter);
 288 }
 289
 290 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 291 {
 292         struct net_device *netdev = adapter->netdev;
 293         struct pci_dev    *pdev   = adapter->pdev;
 294         u16 phy_data;
 295         u16 link_up;
 296
 297         spin_lock(&adapter->mdio_lock);
 298         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 299         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 300         spin_unlock(&adapter->mdio_lock);
 301         link_up = phy_data & BMSR_LSTATUS;
 302         /* notify upper layer link down ASAP */
 303         if (!link_up) {
 304                 if (netif_carrier_ok(netdev)) {
 305                         /* old link state: Up */
 306                         netif_carrier_off(netdev);
 307                         if (netif_msg_link(adapter))
 308                                 dev_info(&pdev->dev,
 309                                         "%s: %s NIC Link is Down\n",
 310                                         atl1c_driver_name, netdev->name);
 311                         adapter->link_speed = SPEED_0;
 312                 }
 313         }
 314         schedule_work(&adapter->link_chg_task);
 315 }
 316
 317 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 318 {
 319         del_timer_sync(&adapter->phy_config_timer);
 320 }
 321
 322 static void atl1c_cancel_work(struct atl1c_adapter *adapter)
 323 {
 324         cancel_work_sync(&adapter->reset_task);
 325         cancel_work_sync(&adapter->link_chg_task);
 326 }
 327
 328 /*
 329  * atl1c_tx_timeout - Respond to a Tx Hang
 330  * @netdev: network interface device structure
 331  */
 332 static void atl1c_tx_timeout(struct net_device *netdev)
 333 {
 334         struct atl1c_adapter *adapter = netdev_priv(netdev);
 335
 336         /* Do the reset outside of interrupt context */
 337         schedule_work(&adapter->reset_task);
 338 }
 339
 340 /*
 341  * atl1c_set_multi - Multicast and Promiscuous mode set
 342  * @netdev: network interface device structure
 343  *
 344  * The set_multi entry point is called whenever the multicast address
 345  * list or the network interface flags are updated.  This routine is
 346  * responsible for configuring the hardware for proper multicast,
 347  * promiscuous mode, and all-multi behavior.
 348  */
 349 static void atl1c_set_multi(struct net_device *netdev)
 350 {
 351         struct atl1c_adapter *adapter = netdev_priv(netdev);
 352         struct atl1c_hw *hw = &adapter->hw;
 353         struct dev_mc_list *mc_ptr;
 354         u32 mac_ctrl_data;
 355         u32 hash_value;
 356
 357         /* Check for Promiscuous and All Multicast modes */
 358         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 359
 360         if (netdev->flags & IFF_PROMISC) {
 361                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 362         } else if (netdev->flags & IFF_ALLMULTI) {
 363                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 364                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 365         } else {
 366                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 367         }
 368
 369         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 370
 371         /* clear the old settings from the multicast hash table */
 372         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 373         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 374
 375         /* comoute mc addresses' hash value ,and put it into hash table */
 376         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 377                 hash_value = atl1c_hash_mc_addr(hw, mc_ptr->dmi_addr);
 378                 atl1c_hash_set(hw, hash_value);
 379         }
 380 }
 381
 382 static void atl1c_vlan_rx_register(struct net_device *netdev,
 383                                    struct vlan_group *grp)
 384 {
 385         struct atl1c_adapter *adapter = netdev_priv(netdev);
 386         struct pci_dev *pdev = adapter->pdev;
 387         u32 mac_ctrl_data = 0;
 388
 389         if (netif_msg_pktdata(adapter))
 390                 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
 391
 392         atl1c_irq_disable(adapter);
 393
 394         adapter->vlgrp = grp;
 395         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 396
 397         if (grp) {
 398                 /* enable VLAN tag insert/strip */
 399                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 400         } else {
 401                 /* disable VLAN tag insert/strip */
 402                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 403         }
 404
 405         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 406         atl1c_irq_enable(adapter);
 407 }
 408
 409 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 410 {
 411         struct pci_dev *pdev = adapter->pdev;
 412
 413         if (netif_msg_pktdata(adapter))
 414                 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
 415         atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 416 }
 417 /*
 418  * atl1c_set_mac - Change the Ethernet Address of the NIC
 419  * @netdev: network interface device structure
 420  * @p: pointer to an address structure
 421  *
 422  * Returns 0 on success, negative on failure
 423  */
 424 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 425 {
 426         struct atl1c_adapter *adapter = netdev_priv(netdev);
 427         struct sockaddr *addr = p;
 428
 429         if (!is_valid_ether_addr(addr->sa_data))
 430                 return -EADDRNOTAVAIL;
 431
 432         if (netif_running(netdev))
 433                 return -EBUSY;
 434
 435         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 436         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 437
 438         atl1c_hw_set_mac_addr(&adapter->hw);
 439
 440         return 0;
 441 }
 442
 443 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 444                                 struct net_device *dev)
 445 {
 446         int mtu = dev->mtu;
 447
 448         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 449                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 450 }
 451 /*
 452  * atl1c_change_mtu - Change the Maximum Transfer Unit
 453  * @netdev: network interface device structure
 454  * @new_mtu: new value for maximum frame size
 455  *
 456  * Returns 0 on success, negative on failure
 457  */
 458 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 459 {
 460         struct atl1c_adapter *adapter = netdev_priv(netdev);
 461         int old_mtu   = netdev->mtu;
 462         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 463
 464         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 465                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 466                 if (netif_msg_link(adapter))
 467                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 468                 return -EINVAL;
 469         }
 470         /* set MTU */
 471         if (old_mtu != new_mtu && netif_running(netdev)) {
 472                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 473                         msleep(1);
 474                 netdev->mtu = new_mtu;
 475                 adapter->hw.max_frame_size = new_mtu;
 476                 atl1c_set_rxbufsize(adapter, netdev);
 477                 atl1c_down(adapter);
 478                 atl1c_up(adapter);
 479                 clear_bit(__AT_RESETTING, &adapter->flags);
 480                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 481                         u32 phy_data;
 482
 483                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 484                         phy_data |= 0x10000000;
 485                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 486                 }
 487
 488         }
 489         return 0;
 490 }
 491
 492 /*
 493  *  caller should hold mdio_lock
 494  */
 495 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 496 {
 497         struct atl1c_adapter *adapter = netdev_priv(netdev);
 498         u16 result;
 499
 500         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 501         return result;
 502 }
 503
 504 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 505                              int reg_num, int val)
 506 {
 507         struct atl1c_adapter *adapter = netdev_priv(netdev);
 508
 509         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 510 }
 511
 512 /*
 513  * atl1c_mii_ioctl -
 514  * @netdev:
 515  * @ifreq:
 516  * @cmd:
 517  */
 518 static int atl1c_mii_ioctl(struct net_device *netdev,
 519                            struct ifreq *ifr, int cmd)
 520 {
 521         struct atl1c_adapter *adapter = netdev_priv(netdev);
 522         struct pci_dev *pdev = adapter->pdev;
 523         struct mii_ioctl_data *data = if_mii(ifr);
 524         unsigned long flags;
 525         int retval = 0;
 526
 527         if (!netif_running(netdev))
 528                 return -EINVAL;
 529
 530         spin_lock_irqsave(&adapter->mdio_lock, flags);
 531         switch (cmd) {
 532         case SIOCGMIIPHY:
 533                 data->phy_id = 0;
 534                 break;
 535
 536         case SIOCGMIIREG:
 537                 if (!capable(CAP_NET_ADMIN)) {
 538                         retval = -EPERM;
 539                         goto out;
 540                 }
 541                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 542                                     &data->val_out)) {
 543                         retval = -EIO;
 544                         goto out;
 545                 }
 546                 break;
 547
 548         case SIOCSMIIREG:
 549                 if (!capable(CAP_NET_ADMIN)) {
 550                         retval = -EPERM;
 551                         goto out;
 552                 }
 553                 if (data->reg_num & ~(0x1F)) {
 554                         retval = -EFAULT;
 555                         goto out;
 556                 }
 557
 558                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 559                                 data->reg_num, data->val_in);
 560                 if (atl1c_write_phy_reg(&adapter->hw,
 561                                      data->reg_num, data->val_in)) {
 562                         retval = -EIO;
 563                         goto out;
 564                 }
 565                 break;
 566
 567         default:
 568                 retval = -EOPNOTSUPP;
 569                 break;
 570         }
 571 out:
 572         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 573         return retval;
 574 }
 575
 576 /*
 577  * atl1c_ioctl -
 578  * @netdev:
 579  * @ifreq:
 580  * @cmd:
 581  */
 582 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 583 {
 584         switch (cmd) {
 585         case SIOCGMIIPHY:
 586         case SIOCGMIIREG:
 587         case SIOCSMIIREG:
 588                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 589         default:
 590                 return -EOPNOTSUPP;
 591         }
 592 }
 593
 594 /*
 595  * atl1c_alloc_queues - Allocate memory for all rings
 596  * @adapter: board private structure to initialize
 597  *
 598  */
 599 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 600 {
 601         return 0;
 602 }
 603
 604 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 605 {
 606         switch (hw->device_id) {
 607         case PCI_DEVICE_ID_ATTANSIC_L2C:
 608                 hw->nic_type = athr_l2c;
 609                 break;
 610
 611         case PCI_DEVICE_ID_ATTANSIC_L1C:
 612                 hw->nic_type = athr_l1c;
 613                 break;
 614
 615         default:
 616                 break;
 617         }
 618 }
 619
 620 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 621 {
 622         u32 phy_status_data;
 623         u32 link_ctrl_data;
 624
 625         atl1c_set_mac_type(hw);
 626         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 627         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 628
 629         hw->ctrl_flags = ATL1C_INTR_CLEAR_ON_READ |
 630                          ATL1C_INTR_MODRT_ENABLE  |
 631                          ATL1C_RX_IPV6_CHKSUM     |
 632                          ATL1C_TXQ_MODE_ENHANCE;
 633         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 634                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 635         if (link_ctrl_data & LINK_CTRL_L1_EN)
 636                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 637
 638         if (hw->nic_type == athr_l1c) {
 639                 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 640                 hw->ctrl_flags |= ATL1C_LINK_CAP_1000M;
 641         }
 642         return 0;
 643 }
 644 /*
 645  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 646  * @adapter: board private structure to initialize
 647  *
 648  * atl1c_sw_init initializes the Adapter private data structure.
 649  * Fields are initialized based on PCI device information and
 650  * OS network device settings (MTU size).
 651  */
 652 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 653 {
 654         struct atl1c_hw *hw   = &adapter->hw;
 655         struct pci_dev  *pdev = adapter->pdev;
 656
 657         adapter->wol = 0;
 658         adapter->link_speed = SPEED_0;
 659         adapter->link_duplex = FULL_DUPLEX;
 660         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
 661         adapter->tpd_ring[0].count = 1024;
 662         adapter->rfd_ring[0].count = 512;
 663
 664         hw->vendor_id = pdev->vendor;
 665         hw->device_id = pdev->device;
 666         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 667         hw->subsystem_id = pdev->subsystem_device;
 668
 669         /* before link up, we assume hibernate is true */
 670         hw->hibernate = true;
 671         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 672         if (atl1c_setup_mac_funcs(hw) != 0) {
 673                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 674                 return -1;
 675         }
 676         hw->intr_mask = IMR_NORMAL_MASK;
 677         hw->phy_configured = false;
 678         hw->preamble_len = 7;
 679         hw->max_frame_size = adapter->netdev->mtu;
 680         if (adapter->num_rx_queues < 2) {
 681                 hw->rss_type = atl1c_rss_disable;
 682                 hw->rss_mode = atl1c_rss_mode_disable;
 683         } else {
 684                 hw->rss_type = atl1c_rss_ipv4;
 685                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
 686                 hw->rss_hash_bits = 16;
 687         }
 688         hw->autoneg_advertised = ADVERTISED_Autoneg;
 689         hw->indirect_tab = 0xE4E4E4E4;
 690         hw->base_cpu = 0;
 691
 692         hw->ict = 50000;                /* 100ms */
 693         hw->smb_timer = 200000;         /* 400ms */
 694         hw->cmb_tpd = 4;
 695         hw->cmb_tx_timer = 1;           /* 2 us  */
 696         hw->rx_imt = 200;
 697         hw->tx_imt = 1000;
 698
 699         hw->tpd_burst = 5;
 700         hw->rfd_burst = 8;
 701         hw->dma_order = atl1c_dma_ord_out;
 702         hw->dmar_block = atl1c_dma_req_1024;
 703         hw->dmaw_block = atl1c_dma_req_1024;
 704         hw->dmar_dly_cnt = 15;
 705         hw->dmaw_dly_cnt = 4;
 706
 707         if (atl1c_alloc_queues(adapter)) {
 708                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 709                 return -ENOMEM;
 710         }
 711         /* TODO */
 712         atl1c_set_rxbufsize(adapter, adapter->netdev);
 713         atomic_set(&adapter->irq_sem, 1);
 714         spin_lock_init(&adapter->mdio_lock);
 715         spin_lock_init(&adapter->tx_lock);
 716         set_bit(__AT_DOWN, &adapter->flags);
 717
 718         return 0;
 719 }
 720
 721 /*
 722  * atl1c_clean_tx_ring - Free Tx-skb
 723  * @adapter: board private structure
 724  */
 725 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 726                                 enum atl1c_trans_queue type)
 727 {
 728         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 729         struct atl1c_buffer *buffer_info;
 730         struct pci_dev *pdev = adapter->pdev;
 731         u16 index, ring_count;
 732
 733         ring_count = tpd_ring->count;
 734         for (index = 0; index < ring_count; index++) {
 735                 buffer_info = &tpd_ring->buffer_info[index];
 736                 if (buffer_info->state == ATL1_BUFFER_FREE)
 737                         continue;
 738                 if (buffer_info->dma)
 739                         pci_unmap_single(pdev, buffer_info->dma,
 740                                         buffer_info->length,
 741                                         PCI_DMA_TODEVICE);
 742                 if (buffer_info->skb)
 743                         dev_kfree_skb(buffer_info->skb);
 744                 buffer_info->dma = 0;
 745                 buffer_info->skb = NULL;
 746                 buffer_info->state = ATL1_BUFFER_FREE;
 747         }
 748
 749         /* Zero out Tx-buffers */
 750         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 751                                 ring_count);
 752         atomic_set(&tpd_ring->next_to_clean, 0);
 753         tpd_ring->next_to_use = 0;
 754 }
 755
 756 /*
 757  * atl1c_clean_rx_ring - Free rx-reservation skbs
 758  * @adapter: board private structure
 759  */
 760 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 761 {
 762         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 763         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 764         struct atl1c_buffer *buffer_info;
 765         struct pci_dev *pdev = adapter->pdev;
 766         int i, j;
 767
 768         for (i = 0; i < adapter->num_rx_queues; i++) {
 769                 for (j = 0; j < rfd_ring[i].count; j++) {
 770                         buffer_info = &rfd_ring[i].buffer_info[j];
 771                         if (buffer_info->state == ATL1_BUFFER_FREE)
 772                                 continue;
 773                         if (buffer_info->dma)
 774                                 pci_unmap_single(pdev, buffer_info->dma,
 775                                                 buffer_info->length,
 776                                                 PCI_DMA_FROMDEVICE);
 777                         if (buffer_info->skb)
 778                                 dev_kfree_skb(buffer_info->skb);
 779                         buffer_info->state = ATL1_BUFFER_FREE;
 780                         buffer_info->skb = NULL;
 781                 }
 782                 /* zero out the descriptor ring */
 783                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
 784                 rfd_ring[i].next_to_clean = 0;
 785                 rfd_ring[i].next_to_use = 0;
 786                 rrd_ring[i].next_to_use = 0;
 787                 rrd_ring[i].next_to_clean = 0;
 788         }
 789 }
 790
 791 /*
 792  * Read / Write Ptr Initialize:
 793  */
 794 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 795 {
 796         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 797         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 798         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 799         struct atl1c_buffer *buffer_info;
 800         int i, j;
 801
 802         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 803                 tpd_ring[i].next_to_use = 0;
 804                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 805                 buffer_info = tpd_ring[i].buffer_info;
 806                 for (j = 0; j < tpd_ring->count; j++)
 807                         buffer_info[i].state = ATL1_BUFFER_FREE;
 808         }
 809         for (i = 0; i < adapter->num_rx_queues; i++) {
 810                 rfd_ring[i].next_to_use = 0;
 811                 rfd_ring[i].next_to_clean = 0;
 812                 rrd_ring[i].next_to_use = 0;
 813                 rrd_ring[i].next_to_clean = 0;
 814                 for (j = 0; j < rfd_ring[i].count; j++) {
 815                         buffer_info = &rfd_ring[i].buffer_info[j];
 816                         buffer_info->state = ATL1_BUFFER_FREE;
 817                 }
 818         }
 819 }
 820
 821 /*
 822  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 823  * @adapter: board private structure
 824  *
 825  * Free all transmit software resources
 826  */
 827 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 828 {
 829         struct pci_dev *pdev = adapter->pdev;
 830
 831         pci_free_consistent(pdev, adapter->ring_header.size,
 832                                         adapter->ring_header.desc,
 833                                         adapter->ring_header.dma);
 834         adapter->ring_header.desc = NULL;
 835
 836         /* Note: just free tdp_ring.buffer_info,
 837         *  it contain rfd_ring.buffer_info, do not double free */
 838         if (adapter->tpd_ring[0].buffer_info) {
 839                 kfree(adapter->tpd_ring[0].buffer_info);
 840                 adapter->tpd_ring[0].buffer_info = NULL;
 841         }
 842 }
 843
 844 /*
 845  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 846  * @adapter: board private structure
 847  *
 848  * Return 0 on success, negative on failure
 849  */
 850 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 851 {
 852         struct pci_dev *pdev = adapter->pdev;
 853         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 854         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 855         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 856         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 857         int num_rx_queues = adapter->num_rx_queues;
 858         int size;
 859         int i;
 860         int count = 0;
 861         int rx_desc_count = 0;
 862         u32 offset = 0;
 863
 864         rrd_ring[0].count = rfd_ring[0].count;
 865         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 866                 tpd_ring[i].count = tpd_ring[0].count;
 867
 868         for (i = 1; i < adapter->num_rx_queues; i++)
 869                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
 870
 871         /* 2 tpd queue, one high priority queue,
 872          * another normal priority queue */
 873         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 874                 rfd_ring->count * num_rx_queues);
 875         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 876         if (unlikely(!tpd_ring->buffer_info)) {
 877                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 878                         size);
 879                 goto err_nomem;
 880         }
 881         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 882                 tpd_ring[i].buffer_info =
 883                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 884                 count += tpd_ring[i].count;
 885         }
 886
 887         for (i = 0; i < num_rx_queues; i++) {
 888                 rfd_ring[i].buffer_info =
 889                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 890                 count += rfd_ring[i].count;
 891                 rx_desc_count += rfd_ring[i].count;
 892         }
 893         /*
 894          * real ring DMA buffer
 895          * each ring/block may need up to 8 bytes for alignment, hence the
 896          * additional bytes tacked onto the end.
 897          */
 898         ring_header->size = size =
 899                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 900                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 901                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 902                 sizeof(struct atl1c_hw_stats) +
 903                 8 * 4 + 8 * 2 * num_rx_queues;
 904
 905         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 906                                 &ring_header->dma);
 907         if (unlikely(!ring_header->desc)) {
 908                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 909                 goto err_nomem;
 910         }
 911         memset(ring_header->desc, 0, ring_header->size);
 912         /* init TPD ring */
 913
 914         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 915         offset = tpd_ring[0].dma - ring_header->dma;
 916         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 917                 tpd_ring[i].dma = ring_header->dma + offset;
 918                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 919                 tpd_ring[i].size =
 920                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 921                 offset += roundup(tpd_ring[i].size, 8);
 922         }
 923         /* init RFD ring */
 924         for (i = 0; i < num_rx_queues; i++) {
 925                 rfd_ring[i].dma = ring_header->dma + offset;
 926                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
 927                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
 928                                 rfd_ring[i].count;
 929                 offset += roundup(rfd_ring[i].size, 8);
 930         }
 931
 932         /* init RRD ring */
 933         for (i = 0; i < num_rx_queues; i++) {
 934                 rrd_ring[i].dma = ring_header->dma + offset;
 935                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
 936                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
 937                                 rrd_ring[i].count;
 938                 offset += roundup(rrd_ring[i].size, 8);
 939         }
 940
 941         adapter->smb.dma = ring_header->dma + offset;
 942         adapter->smb.smb = (u8 *)ring_header->desc + offset;
 943         return 0;
 944
 945 err_nomem:
 946         kfree(tpd_ring->buffer_info);
 947         return -ENOMEM;
 948 }
 949
 950 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
 951 {
 952         struct atl1c_hw *hw = &adapter->hw;
 953         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
 954                                 adapter->rfd_ring;
 955         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
 956                                 adapter->rrd_ring;
 957         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
 958                                 adapter->tpd_ring;
 959         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
 960         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
 961         int i;
 962
 963         /* TPD */
 964         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
 965                         (u32)((tpd_ring[atl1c_trans_normal].dma &
 966                                 AT_DMA_HI_ADDR_MASK) >> 32));
 967         /* just enable normal priority TX queue */
 968         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
 969                         (u32)(tpd_ring[atl1c_trans_normal].dma &
 970                                 AT_DMA_LO_ADDR_MASK));
 971         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
 972                         (u32)(tpd_ring[atl1c_trans_high].dma &
 973                                 AT_DMA_LO_ADDR_MASK));
 974         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
 975                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
 976
 977
 978         /* RFD */
 979         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
 980                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
 981         for (i = 0; i < adapter->num_rx_queues; i++)
 982                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
 983                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 984
 985         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
 986                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
 987         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
 988                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
 989
 990         /* RRD */
 991         for (i = 0; i < adapter->num_rx_queues; i++)
 992                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
 993                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 994         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
 995                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
 996
 997         /* CMB */
 998         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
 999
1000         /* SMB */
1001         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
1002                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1003         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
1004                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
1005         /* Load all of base address above */
1006         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1007 }
1008
1009 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1010 {
1011         struct atl1c_hw *hw = &adapter->hw;
1012         u32 dev_ctrl_data;
1013         u32 max_pay_load;
1014         u16 tx_offload_thresh;
1015         u32 txq_ctrl_data;
1016         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
1017
1018         extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1019         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1020         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1021                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1022         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1023         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1024                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1025         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
1026         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1027                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1028         hw->dmar_block = min(max_pay_load, hw->dmar_block);
1029
1030         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1031                         TXQ_NUM_TPD_BURST_SHIFT;
1032         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1033                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1034         txq_ctrl_data |= (atl1c_pay_load_size[hw->dmar_block] &
1035                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1036
1037         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1038 }
1039
1040 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1041 {
1042         struct atl1c_hw *hw = &adapter->hw;
1043         u32 rxq_ctrl_data;
1044
1045         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1046                         RXQ_RFD_BURST_NUM_SHIFT;
1047
1048         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1049                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1050         if (hw->rss_type == atl1c_rss_ipv4)
1051                 rxq_ctrl_data |= RSS_HASH_IPV4;
1052         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1053                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1054         if (hw->rss_type == atl1c_rss_ipv6)
1055                 rxq_ctrl_data |= RSS_HASH_IPV6;
1056         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1057                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1058         if (hw->rss_type != atl1c_rss_disable)
1059                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1060
1061         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1062                         RSS_MODE_SHIFT;
1063         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1064                         RSS_HASH_BITS_SHIFT;
1065         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1066                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_100M &
1067                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1068
1069         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1070 }
1071
1072 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1073 {
1074         struct atl1c_hw *hw = &adapter->hw;
1075
1076         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1077         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1078 }
1079
1080 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1081 {
1082         struct atl1c_hw *hw = &adapter->hw;
1083         u32 dma_ctrl_data;
1084
1085         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1086         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1087                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1088         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1089                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1090         else
1091                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1092
1093         switch (hw->dma_order) {
1094         case atl1c_dma_ord_in:
1095                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1096                 break;
1097         case atl1c_dma_ord_enh:
1098                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1099                 break;
1100         case atl1c_dma_ord_out:
1101                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1102                 break;
1103         default:
1104                 break;
1105         }
1106
1107         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1108                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1109         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1110                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1111         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1112                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1113         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1114                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1115
1116         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1117 }
1118
1119 /*
1120  * Stop the mac, transmit and receive units
1121  * hw - Struct containing variables accessed by shared code
1122  * return : 0  or  idle status (if error)
1123  */
1124 static int atl1c_stop_mac(struct atl1c_hw *hw)
1125 {
1126         u32 data;
1127
1128         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1129         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1130                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1131         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1132
1133         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1134         data &= ~TXQ_CTRL_EN;
1135         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1136
1137         atl1c_wait_until_idle(hw);
1138
1139         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1140         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1141         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1142
1143         return (int)atl1c_wait_until_idle(hw);
1144 }
1145
1146 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1147 {
1148         u32 data;
1149
1150         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1151         switch (hw->adapter->num_rx_queues) {
1152         case 4:
1153                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1154                 break;
1155         case 3:
1156                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1157                 break;
1158         case 2:
1159                 data |= RXQ1_CTRL_EN;
1160                 break;
1161         default:
1162                 break;
1163         }
1164         data |= RXQ_CTRL_EN;
1165         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1166 }
1167
1168 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1169 {
1170         u32 data;
1171
1172         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1173         data |= TXQ_CTRL_EN;
1174         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1175 }
1176
1177 /*
1178  * Reset the transmit and receive units; mask and clear all interrupts.
1179  * hw - Struct containing variables accessed by shared code
1180  * return : 0  or  idle status (if error)
1181  */
1182 static int atl1c_reset_mac(struct atl1c_hw *hw)
1183 {
1184         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1185         struct pci_dev *pdev = adapter->pdev;
1186         int ret;
1187
1188         AT_WRITE_REG(hw, REG_IMR, 0);
1189         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1190
1191         ret = atl1c_stop_mac(hw);
1192         if (ret)
1193                 return ret;
1194         /*
1195          * Issue Soft Reset to the MAC.  This will reset the chip's
1196          * transmit, receive, DMA.  It will not effect
1197          * the current PCI configuration.  The global reset bit is self-
1198          * clearing, and should clear within a microsecond.
1199          */
1200         AT_WRITE_REGW(hw, REG_MASTER_CTRL, MASTER_CTRL_SOFT_RST);
1201         AT_WRITE_FLUSH(hw);
1202         msleep(10);
1203         /* Wait at least 10ms for All module to be Idle */
1204
1205         if (atl1c_wait_until_idle(hw)) {
1206                 dev_err(&pdev->dev,
1207                         "MAC state machine can't be idle since"
1208                         " disabled for 10ms second\n");
1209                 return -1;
1210         }
1211         return 0;
1212 }
1213
1214 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1215 {
1216         u32 pm_ctrl_data;
1217
1218         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1219         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1220                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1221         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1222         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1223         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1224         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1225         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1226
1227         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1228         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1229         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1230         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1231 }
1232
1233 /*
1234  * Set ASPM state.
1235  * Enable/disable L0s/L1 depend on link state.
1236  */
1237 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1238 {
1239         u32 pm_ctrl_data;
1240
1241         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1242
1243         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1244         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1245                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1246
1247         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1248
1249         if (linkup) {
1250                 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1251                 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1252
1253                 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1254                 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1255         } else {
1256                 pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1257                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1258                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1259                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1260
1261                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1262
1263                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1264                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1265                 else
1266                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1267         }
1268
1269         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1270 }
1271
1272 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1273 {
1274         struct atl1c_hw *hw = &adapter->hw;
1275         struct net_device *netdev = adapter->netdev;
1276         u32 mac_ctrl_data;
1277
1278         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1279         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1280
1281         if (adapter->link_duplex == FULL_DUPLEX) {
1282                 hw->mac_duplex = true;
1283                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1284         }
1285
1286         if (adapter->link_speed == SPEED_1000)
1287                 hw->mac_speed = atl1c_mac_speed_1000;
1288         else
1289                 hw->mac_speed = atl1c_mac_speed_10_100;
1290
1291         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1292                         MAC_CTRL_SPEED_SHIFT;
1293
1294         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1295         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1296                         MAC_CTRL_PRMLEN_SHIFT);
1297
1298         if (adapter->vlgrp)
1299                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1300
1301         mac_ctrl_data |= MAC_CTRL_BC_EN;
1302         if (netdev->flags & IFF_PROMISC)
1303                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1304         if (netdev->flags & IFF_ALLMULTI)
1305                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1306
1307         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1308         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1309 }
1310
1311 /*
1312  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1313  * @adapter: board private structure
1314  *
1315  * Configure the Tx /Rx unit of the MAC after a reset.
1316  */
1317 static int atl1c_configure(struct atl1c_adapter *adapter)
1318 {
1319         struct atl1c_hw *hw = &adapter->hw;
1320         u32 master_ctrl_data = 0;
1321         u32 intr_modrt_data;
1322
1323         /* clear interrupt status */
1324         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1325         /*  Clear any WOL status */
1326         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1327         /* set Interrupt Clear Timer
1328          * HW will enable self to assert interrupt event to system after
1329          * waiting x-time for software to notify it accept interrupt.
1330          */
1331         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1332                 hw->ict & INT_RETRIG_TIMER_MASK);
1333
1334         atl1c_configure_des_ring(adapter);
1335
1336         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1337                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1338                                         IRQ_MODRT_TX_TIMER_SHIFT;
1339                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1340                                         IRQ_MODRT_RX_TIMER_SHIFT;
1341                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1342                 master_ctrl_data |=
1343                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1344         }
1345
1346         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1347                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1348
1349         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1350
1351         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1352                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1353                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1354                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1355                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1356         }
1357
1358         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1359                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1360                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1361         /* set MTU */
1362         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1363                         VLAN_HLEN + ETH_FCS_LEN);
1364         /* HDS, disable */
1365         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1366
1367         atl1c_configure_tx(adapter);
1368         atl1c_configure_rx(adapter);
1369         atl1c_configure_rss(adapter);
1370         atl1c_configure_dma(adapter);
1371
1372         return 0;
1373 }
1374
1375 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1376 {
1377         u16 hw_reg_addr = 0;
1378         unsigned long *stats_item = NULL;
1379         u32 data;
1380
1381         /* update rx status */
1382         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1383         stats_item  = &adapter->hw_stats.rx_ok;
1384         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1385                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1386                 *stats_item += data;
1387                 stats_item++;
1388                 hw_reg_addr += 4;
1389         }
1390 /* update tx status */
1391         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1392         stats_item  = &adapter->hw_stats.tx_ok;
1393         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1394                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1395                 *stats_item += data;
1396                 stats_item++;
1397                 hw_reg_addr += 4;
1398         }
1399 }
1400
1401 /*
1402  * atl1c_get_stats - Get System Network Statistics
1403  * @netdev: network interface device structure
1404  *
1405  * Returns the address of the device statistics structure.
1406  * The statistics are actually updated from the timer callback.
1407  */
1408 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1409 {
1410         struct atl1c_adapter *adapter = netdev_priv(netdev);
1411         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1412         struct net_device_stats *net_stats = &adapter->net_stats;
1413
1414         atl1c_update_hw_stats(adapter);
1415         net_stats->rx_packets = hw_stats->rx_ok;
1416         net_stats->tx_packets = hw_stats->tx_ok;
1417         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1418         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1419         net_stats->multicast  = hw_stats->rx_mcast;
1420         net_stats->collisions = hw_stats->tx_1_col +
1421                                 hw_stats->tx_2_col * 2 +
1422                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1423         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1424                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1425                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1426         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1427         net_stats->rx_length_errors = hw_stats->rx_len_err;
1428         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1429         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1430         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1431
1432         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1433
1434         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1435                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1436         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1437         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1438         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1439
1440         return &adapter->net_stats;
1441 }
1442
1443 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1444 {
1445         u16 phy_data;
1446
1447         spin_lock(&adapter->mdio_lock);
1448         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1449         spin_unlock(&adapter->mdio_lock);
1450 }
1451
1452 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1453                                 enum atl1c_trans_queue type)
1454 {
1455         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1456                                 &adapter->tpd_ring[type];
1457         struct atl1c_buffer *buffer_info;
1458         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1459         u16 hw_next_to_clean;
1460         u16 shift;
1461         u32 data;
1462
1463         if (type == atl1c_trans_high)
1464                 shift = MB_HTPD_CONS_IDX_SHIFT;
1465         else
1466                 shift = MB_NTPD_CONS_IDX_SHIFT;
1467
1468         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1469         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1470
1471         while (next_to_clean != hw_next_to_clean) {
1472                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1473                 if (buffer_info->state == ATL1_BUFFER_BUSY) {
1474                         pci_unmap_page(adapter->pdev, buffer_info->dma,
1475                                         buffer_info->length, PCI_DMA_TODEVICE);
1476                         buffer_info->dma = 0;
1477                         if (buffer_info->skb) {
1478                                 dev_kfree_skb_irq(buffer_info->skb);
1479                                 buffer_info->skb = NULL;
1480                         }
1481                         buffer_info->state = ATL1_BUFFER_FREE;
1482                 }
1483                 if (++next_to_clean == tpd_ring->count)
1484                         next_to_clean = 0;
1485                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1486         }
1487
1488         if (netif_queue_stopped(adapter->netdev) &&
1489                         netif_carrier_ok(adapter->netdev)) {
1490                 netif_wake_queue(adapter->netdev);
1491         }
1492
1493         return true;
1494 }
1495
1496 /*
1497  * atl1c_intr - Interrupt Handler
1498  * @irq: interrupt number
1499  * @data: pointer to a network interface device structure
1500  * @pt_regs: CPU registers structure
1501  */
1502 static irqreturn_t atl1c_intr(int irq, void *data)
1503 {
1504         struct net_device *netdev  = data;
1505         struct atl1c_adapter *adapter = netdev_priv(netdev);
1506         struct pci_dev *pdev = adapter->pdev;
1507         struct atl1c_hw *hw = &adapter->hw;
1508         int max_ints = AT_MAX_INT_WORK;
1509         int handled = IRQ_NONE;
1510         u32 status;
1511         u32 reg_data;
1512
1513         do {
1514                 AT_READ_REG(hw, REG_ISR, &reg_data);
1515                 status = reg_data & hw->intr_mask;
1516
1517                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1518                         if (max_ints != AT_MAX_INT_WORK)
1519                                 handled = IRQ_HANDLED;
1520                         break;
1521                 }
1522                 /* link event */
1523                 if (status & ISR_GPHY)
1524                         atl1c_clear_phy_int(adapter);
1525                 /* Ack ISR */
1526                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1527                 if (status & ISR_RX_PKT) {
1528                         if (likely(napi_schedule_prep(&adapter->napi))) {
1529                                 hw->intr_mask &= ~ISR_RX_PKT;
1530                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1531                                 __napi_schedule(&adapter->napi);
1532                         }
1533                 }
1534                 if (status & ISR_TX_PKT)
1535                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1536
1537                 handled = IRQ_HANDLED;
1538                 /* check if PCIE PHY Link down */
1539                 if (status & ISR_ERROR) {
1540                         if (netif_msg_hw(adapter))
1541                                 dev_err(&pdev->dev,
1542                                         "atl1c hardware error (status = 0x%x)\n",
1543                                         status & ISR_ERROR);
1544                         /* reset MAC */
1545                         hw->intr_mask &= ~ISR_ERROR;
1546                         AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1547                         schedule_work(&adapter->reset_task);
1548                         break;
1549                 }
1550
1551                 if (status & ISR_OVER)
1552                         if (netif_msg_intr(adapter))
1553                                 dev_warn(&pdev->dev,
1554                                         "TX/RX over flow (status = 0x%x)\n",
1555                                         status & ISR_OVER);
1556
1557                 /* link event */
1558                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1559                         adapter->net_stats.tx_carrier_errors++;
1560                         atl1c_link_chg_event(adapter);
1561                         break;
1562                 }
1563
1564         } while (--max_ints > 0);
1565         /* re-enable Interrupt*/
1566         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1567         return handled;
1568 }
1569
1570 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1571                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1572 {
1573         /*
1574          * The pid field in RRS in not correct sometimes, so we
1575          * cannot figure out if the packet is fragmented or not,
1576          * so we tell the KERNEL CHECKSUM_NONE
1577          */
1578         skb->ip_summed = CHECKSUM_NONE;
1579 }
1580
1581 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1582 {
1583         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1584         struct pci_dev *pdev = adapter->pdev;
1585         struct atl1c_buffer *buffer_info, *next_info;
1586         struct sk_buff *skb;
1587         void *vir_addr = NULL;
1588         u16 num_alloc = 0;
1589         u16 rfd_next_to_use, next_next;
1590         struct atl1c_rx_free_desc *rfd_desc;
1591
1592         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1593         if (++next_next == rfd_ring->count)
1594                 next_next = 0;
1595         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1596         next_info = &rfd_ring->buffer_info[next_next];
1597
1598         while (next_info->state == ATL1_BUFFER_FREE) {
1599                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1600
1601                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1602                 if (unlikely(!skb)) {
1603                         if (netif_msg_rx_err(adapter))
1604                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1605                         break;
1606                 }
1607
1608                 /*
1609                  * Make buffer alignment 2 beyond a 16 byte boundary
1610                  * this will result in a 16 byte aligned IP header after
1611                  * the 14 byte MAC header is removed
1612                  */
1613                 vir_addr = skb->data;
1614                 buffer_info->state = ATL1_BUFFER_BUSY;
1615                 buffer_info->skb = skb;
1616                 buffer_info->length = adapter->rx_buffer_len;
1617                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1618                                                 buffer_info->length,
1619                                                 PCI_DMA_FROMDEVICE);
1620                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1621                 rfd_next_to_use = next_next;
1622                 if (++next_next == rfd_ring->count)
1623                         next_next = 0;
1624                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1625                 next_info = &rfd_ring->buffer_info[next_next];
1626                 num_alloc++;
1627         }
1628
1629         if (num_alloc) {
1630                 /* TODO: update mailbox here */
1631                 wmb();
1632                 rfd_ring->next_to_use = rfd_next_to_use;
1633                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1634                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1635         }
1636
1637         return num_alloc;
1638 }
1639
1640 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1641                         struct  atl1c_recv_ret_status *rrs, u16 num)
1642 {
1643         u16 i;
1644         /* the relationship between rrd and rfd is one map one */
1645         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1646                                         rrd_ring->next_to_clean)) {
1647                 rrs->word3 &= ~RRS_RXD_UPDATED;
1648                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1649                         rrd_ring->next_to_clean = 0;
1650         }
1651 }
1652
1653 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1654         struct atl1c_recv_ret_status *rrs, u16 num)
1655 {
1656         u16 i;
1657         u16 rfd_index;
1658         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1659
1660         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1661                         RRS_RX_RFD_INDEX_MASK;
1662         for (i = 0; i < num; i++) {
1663                 buffer_info[rfd_index].skb = NULL;
1664                 buffer_info[rfd_index].state = ATL1_BUFFER_FREE;
1665                 if (++rfd_index == rfd_ring->count)
1666                         rfd_index = 0;
1667         }
1668         rfd_ring->next_to_clean = rfd_index;
1669 }
1670
1671 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1672                    int *work_done, int work_to_do)
1673 {
1674         u16 rfd_num, rfd_index;
1675         u16 count = 0;
1676         u16 length;
1677         struct pci_dev *pdev = adapter->pdev;
1678         struct net_device *netdev  = adapter->netdev;
1679         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1680         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1681         struct sk_buff *skb;
1682         struct atl1c_recv_ret_status *rrs;
1683         struct atl1c_buffer *buffer_info;
1684
1685         while (1) {
1686                 if (*work_done >= work_to_do)
1687                         break;
1688                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1689                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1690                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1691                                 RRS_RX_RFD_CNT_MASK;
1692                         if (unlikely(rfd_num != 1))
1693                                 /* TODO support mul rfd*/
1694                                 if (netif_msg_rx_err(adapter))
1695                                         dev_warn(&pdev->dev,
1696                                                 "Multi rfd not support yet!\n");
1697                         goto rrs_checked;
1698                 } else {
1699                         break;
1700                 }
1701 rrs_checked:
1702                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1703                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1704                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1705                                 if (netif_msg_rx_err(adapter))
1706                                         dev_warn(&pdev->dev,
1707                                                 "wrong packet! rrs word3 is %x\n",
1708                                                 rrs->word3);
1709                         continue;
1710                 }
1711
1712                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1713                                 RRS_PKT_SIZE_MASK);
1714                 /* Good Receive */
1715                 if (likely(rfd_num == 1)) {
1716                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1717                                         RRS_RX_RFD_INDEX_MASK;
1718                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1719                         pci_unmap_single(pdev, buffer_info->dma,
1720                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1721                         skb = buffer_info->skb;
1722                 } else {
1723                         /* TODO */
1724                         if (netif_msg_rx_err(adapter))
1725                                 dev_warn(&pdev->dev,
1726                                         "Multi rfd not support yet!\n");
1727                         break;
1728                 }
1729                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1730                 skb_put(skb, length - ETH_FCS_LEN);
1731                 skb->protocol = eth_type_trans(skb, netdev);
1732                 skb->dev = netdev;
1733                 atl1c_rx_checksum(adapter, skb, rrs);
1734                 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1735                         u16 vlan;
1736
1737                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1738                         vlan = le16_to_cpu(vlan);
1739                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1740                 } else
1741                         netif_receive_skb(skb);
1742
1743                 netdev->last_rx = jiffies;
1744                 (*work_done)++;
1745                 count++;
1746         }
1747         if (count)
1748                 atl1c_alloc_rx_buffer(adapter, que);
1749 }
1750
1751 /*
1752  * atl1c_clean - NAPI Rx polling callback
1753  * @adapter: board private structure
1754  */
1755 static int atl1c_clean(struct napi_struct *napi, int budget)
1756 {
1757         struct atl1c_adapter *adapter =
1758                         container_of(napi, struct atl1c_adapter, napi);
1759         int work_done = 0;
1760
1761         /* Keep link state information with original netdev */
1762         if (!netif_carrier_ok(adapter->netdev))
1763                 goto quit_polling;
1764         /* just enable one RXQ */
1765         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1766
1767         if (work_done < budget) {
1768 quit_polling:
1769                 napi_complete(napi);
1770                 adapter->hw.intr_mask |= ISR_RX_PKT;
1771                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1772         }
1773         return work_done;
1774 }
1775
1776 #ifdef CONFIG_NET_POLL_CONTROLLER
1777
1778 /*
1779  * Polling 'interrupt' - used by things like netconsole to send skbs
1780  * without having to re-enable interrupts. It's not called while
1781  * the interrupt routine is executing.
1782  */
1783 static void atl1c_netpoll(struct net_device *netdev)
1784 {
1785         struct atl1c_adapter *adapter = netdev_priv(netdev);
1786
1787         disable_irq(adapter->pdev->irq);
1788         atl1c_intr(adapter->pdev->irq, netdev);
1789         enable_irq(adapter->pdev->irq);
1790 }
1791 #endif
1792
1793 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1794 {
1795         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1796         u16 next_to_use = 0;
1797         u16 next_to_clean = 0;
1798
1799         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1800         next_to_use   = tpd_ring->next_to_use;
1801
1802         return (u16)(next_to_clean > next_to_use) ?
1803                 (next_to_clean - next_to_use - 1) :
1804                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1805 }
1806
1807 /*
1808  * get next usable tpd
1809  * Note: should call atl1c_tdp_avail to make sure
1810  * there is enough tpd to use
1811  */
1812 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1813         enum atl1c_trans_queue type)
1814 {
1815         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1816         struct atl1c_tpd_desc *tpd_desc;
1817         u16 next_to_use = 0;
1818
1819         next_to_use = tpd_ring->next_to_use;
1820         if (++tpd_ring->next_to_use == tpd_ring->count)
1821                 tpd_ring->next_to_use = 0;
1822         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1823         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1824         return  tpd_desc;
1825 }
1826
1827 static struct atl1c_buffer *
1828 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1829 {
1830         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1831
1832         return &tpd_ring->buffer_info[tpd -
1833                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1834 }
1835
1836 /* Calculate the transmit packet descript needed*/
1837 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1838 {
1839         u16 tpd_req;
1840         u16 proto_hdr_len = 0;
1841
1842         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1843
1844         if (skb_is_gso(skb)) {
1845                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1846                 if (proto_hdr_len < skb_headlen(skb))
1847                         tpd_req++;
1848                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1849                         tpd_req++;
1850         }
1851         return tpd_req;
1852 }
1853
1854 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1855                           struct sk_buff *skb,
1856                           struct atl1c_tpd_desc **tpd,
1857                           enum atl1c_trans_queue type)
1858 {
1859         struct pci_dev *pdev = adapter->pdev;
1860         u8 hdr_len;
1861         u32 real_len;
1862         unsigned short offload_type;
1863         int err;
1864
1865         if (skb_is_gso(skb)) {
1866                 if (skb_header_cloned(skb)) {
1867                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1868                         if (unlikely(err))
1869                                 return -1;
1870                 }
1871                 offload_type = skb_shinfo(skb)->gso_type;
1872
1873                 if (offload_type & SKB_GSO_TCPV4) {
1874                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1875                                         + ntohs(ip_hdr(skb)->tot_len));
1876
1877                         if (real_len < skb->len)
1878                                 pskb_trim(skb, real_len);
1879
1880                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1881                         if (unlikely(skb->len == hdr_len)) {
1882                                 /* only xsum need */
1883                                 if (netif_msg_tx_queued(adapter))
1884                                         dev_warn(&pdev->dev,
1885                                                 "IPV4 tso with zero data??\n");
1886                                 goto check_sum;
1887                         } else {
1888                                 ip_hdr(skb)->check = 0;
1889                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1890                                                         ip_hdr(skb)->saddr,
1891                                                         ip_hdr(skb)->daddr,
1892                                                         0, IPPROTO_TCP, 0);
1893                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1894                         }
1895                 }
1896
1897                 if (offload_type & SKB_GSO_TCPV6) {
1898                         struct atl1c_tpd_ext_desc *etpd =
1899                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1900
1901                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1902                         *tpd = atl1c_get_tpd(adapter, type);
1903                         ipv6_hdr(skb)->payload_len = 0;
1904                         /* check payload == 0 byte ? */
1905                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1906                         if (unlikely(skb->len == hdr_len)) {
1907                                 /* only xsum need */
1908                                 if (netif_msg_tx_queued(adapter))
1909                                         dev_warn(&pdev->dev,
1910                                                 "IPV6 tso with zero data??\n");
1911                                 goto check_sum;
1912                         } else
1913                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1914                                                 &ipv6_hdr(skb)->saddr,
1915                                                 &ipv6_hdr(skb)->daddr,
1916                                                 0, IPPROTO_TCP, 0);
1917                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1918                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1919                         etpd->pkt_len = cpu_to_le32(skb->len);
1920                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1921                 }
1922
1923                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1924                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1925                                 TPD_TCPHDR_OFFSET_SHIFT;
1926                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1927                                 TPD_MSS_SHIFT;
1928                 return 0;
1929         }
1930
1931 check_sum:
1932         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1933                 u8 css, cso;
1934                 cso = skb_transport_offset(skb);
1935
1936                 if (unlikely(cso & 0x1)) {
1937                         if (netif_msg_tx_err(adapter))
1938                                 dev_err(&adapter->pdev->dev,
1939                                         "payload offset should not an event number\n");
1940                         return -1;
1941                 } else {
1942                         css = cso + skb->csum_offset;
1943
1944                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1945                                         TPD_PLOADOFFSET_SHIFT;
1946                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1947                                         TPD_CCSUM_OFFSET_SHIFT;
1948                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1949                 }
1950         }
1951         return 0;
1952 }
1953
1954 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1955                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1956                         enum atl1c_trans_queue type)
1957 {
1958         struct atl1c_tpd_desc *use_tpd = NULL;
1959         struct atl1c_buffer *buffer_info = NULL;
1960         u16 buf_len = skb_headlen(skb);
1961         u16 map_len = 0;
1962         u16 mapped_len = 0;
1963         u16 hdr_len = 0;
1964         u16 nr_frags;
1965         u16 f;
1966         int tso;
1967
1968         nr_frags = skb_shinfo(skb)->nr_frags;
1969         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
1970         if (tso) {
1971                 /* TSO */
1972                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1973                 use_tpd = tpd;
1974
1975                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1976                 buffer_info->length = map_len;
1977                 buffer_info->dma = pci_map_single(adapter->pdev,
1978                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1979                 buffer_info->state = ATL1_BUFFER_BUSY;
1980                 mapped_len += map_len;
1981                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1982                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1983         }
1984
1985         if (mapped_len < buf_len) {
1986                 /* mapped_len == 0, means we should use the first tpd,
1987                    which is given by caller  */
1988                 if (mapped_len == 0)
1989                         use_tpd = tpd;
1990                 else {
1991                         use_tpd = atl1c_get_tpd(adapter, type);
1992                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1993                         use_tpd = atl1c_get_tpd(adapter, type);
1994                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1995                 }
1996                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1997                 buffer_info->length = buf_len - mapped_len;
1998                 buffer_info->dma =
1999                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2000                                         buffer_info->length, PCI_DMA_TODEVICE);
2001                 buffer_info->state = ATL1_BUFFER_BUSY;
2002
2003                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2004                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2005         }
2006
2007         for (f = 0; f < nr_frags; f++) {
2008                 struct skb_frag_struct *frag;
2009
2010                 frag = &skb_shinfo(skb)->frags[f];
2011
2012                 use_tpd = atl1c_get_tpd(adapter, type);
2013                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2014
2015                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2016                 buffer_info->length = frag->size;
2017                 buffer_info->dma =
2018                         pci_map_page(adapter->pdev, frag->page,
2019                                         frag->page_offset,
2020                                         buffer_info->length,
2021                                         PCI_DMA_TODEVICE);
2022                 buffer_info->state = ATL1_BUFFER_BUSY;
2023
2024                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2025                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2026         }
2027
2028         /* The last tpd */
2029         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2030         /* The last buffer info contain the skb address,
2031            so it will be free after unmap */
2032         buffer_info->skb = skb;
2033 }
2034
2035 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2036                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2037 {
2038         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2039         u32 prod_data;
2040
2041         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2042         switch (type) {
2043         case atl1c_trans_high:
2044                 prod_data &= 0xFFFF0000;
2045                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2046                 break;
2047         case atl1c_trans_normal:
2048                 prod_data &= 0x0000FFFF;
2049                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2050                 break;
2051         default:
2052                 break;
2053         }
2054         wmb();
2055         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2056 }
2057
2058 static int atl1c_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2059 {
2060         struct atl1c_adapter *adapter = netdev_priv(netdev);
2061         unsigned long flags;
2062         u16 tpd_req = 1;
2063         struct atl1c_tpd_desc *tpd;
2064         enum atl1c_trans_queue type = atl1c_trans_normal;
2065
2066         if (test_bit(__AT_DOWN, &adapter->flags)) {
2067                 dev_kfree_skb_any(skb);
2068                 return NETDEV_TX_OK;
2069         }
2070
2071         tpd_req = atl1c_cal_tpd_req(skb);
2072         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2073                 if (netif_msg_pktdata(adapter))
2074                         dev_info(&adapter->pdev->dev, "tx locked\n");
2075                 return NETDEV_TX_LOCKED;
2076         }
2077         if (skb->mark == 0x01)
2078                 type = atl1c_trans_high;
2079         else
2080                 type = atl1c_trans_normal;
2081
2082         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2083                 /* no enough descriptor, just stop queue */
2084                 netif_stop_queue(netdev);
2085                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2086                 return NETDEV_TX_BUSY;
2087         }
2088
2089         tpd = atl1c_get_tpd(adapter, type);
2090
2091         /* do TSO and check sum */
2092         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2093                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2094                 dev_kfree_skb_any(skb);
2095                 return NETDEV_TX_OK;
2096         }
2097
2098         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2099                 u16 vlan = vlan_tx_tag_get(skb);
2100                 __le16 tag;
2101
2102                 vlan = cpu_to_le16(vlan);
2103                 AT_VLAN_TO_TAG(vlan, tag);
2104                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2105                 tpd->vlan_tag = tag;
2106         }
2107
2108         if (skb_network_offset(skb) != ETH_HLEN)
2109                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2110
2111         atl1c_tx_map(adapter, skb, tpd, type);
2112         atl1c_tx_queue(adapter, skb, tpd, type);
2113
2114         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2115         return NETDEV_TX_OK;
2116 }
2117
2118 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2119 {
2120         struct net_device *netdev = adapter->netdev;
2121
2122         free_irq(adapter->pdev->irq, netdev);
2123
2124         if (adapter->have_msi)
2125                 pci_disable_msi(adapter->pdev);
2126 }
2127
2128 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2129 {
2130         struct pci_dev    *pdev   = adapter->pdev;
2131         struct net_device *netdev = adapter->netdev;
2132         int flags = 0;
2133         int err = 0;
2134
2135         adapter->have_msi = true;
2136         err = pci_enable_msi(adapter->pdev);
2137         if (err) {
2138                 if (netif_msg_ifup(adapter))
2139                         dev_err(&pdev->dev,
2140                                 "Unable to allocate MSI interrupt Error: %d\n",
2141                                 err);
2142                 adapter->have_msi = false;
2143         } else
2144                 netdev->irq = pdev->irq;
2145
2146         if (!adapter->have_msi)
2147                 flags |= IRQF_SHARED;
2148         err = request_irq(adapter->pdev->irq, &atl1c_intr, flags,
2149                         netdev->name, netdev);
2150         if (err) {
2151                 if (netif_msg_ifup(adapter))
2152                         dev_err(&pdev->dev,
2153                                 "Unable to allocate interrupt Error: %d\n",
2154                                 err);
2155                 if (adapter->have_msi)
2156                         pci_disable_msi(adapter->pdev);
2157                 return err;
2158         }
2159         if (netif_msg_ifup(adapter))
2160                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2161         return err;
2162 }
2163
2164 int atl1c_up(struct atl1c_adapter *adapter)
2165 {
2166         struct net_device *netdev = adapter->netdev;
2167         int num;
2168         int err;
2169         int i;
2170
2171         netif_carrier_off(netdev);
2172         atl1c_init_ring_ptrs(adapter);
2173         atl1c_set_multi(netdev);
2174         atl1c_restore_vlan(adapter);
2175
2176         for (i = 0; i < adapter->num_rx_queues; i++) {
2177                 num = atl1c_alloc_rx_buffer(adapter, i);
2178                 if (unlikely(num == 0)) {
2179                         err = -ENOMEM;
2180                         goto err_alloc_rx;
2181                 }
2182         }
2183
2184         if (atl1c_configure(adapter)) {
2185                 err = -EIO;
2186                 goto err_up;
2187         }
2188
2189         err = atl1c_request_irq(adapter);
2190         if (unlikely(err))
2191                 goto err_up;
2192
2193         clear_bit(__AT_DOWN, &adapter->flags);
2194         napi_enable(&adapter->napi);
2195         atl1c_irq_enable(adapter);
2196         atl1c_check_link_status(adapter);
2197         netif_start_queue(netdev);
2198         return err;
2199
2200 err_up:
2201 err_alloc_rx:
2202         atl1c_clean_rx_ring(adapter);
2203         return err;
2204 }
2205
2206 void atl1c_down(struct atl1c_adapter *adapter)
2207 {
2208         struct net_device *netdev = adapter->netdev;
2209
2210         atl1c_del_timer(adapter);
2211         atl1c_cancel_work(adapter);
2212
2213         /* signal that we're down so the interrupt handler does not
2214          * reschedule our watchdog timer */
2215         set_bit(__AT_DOWN, &adapter->flags);
2216         netif_carrier_off(netdev);
2217         napi_disable(&adapter->napi);
2218         atl1c_irq_disable(adapter);
2219         atl1c_free_irq(adapter);
2220         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
2221         /* reset MAC to disable all RX/TX */
2222         atl1c_reset_mac(&adapter->hw);
2223         msleep(1);
2224
2225         adapter->link_speed = SPEED_0;
2226         adapter->link_duplex = -1;
2227         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2228         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2229         atl1c_clean_rx_ring(adapter);
2230 }
2231
2232 /*
2233  * atl1c_open - Called when a network interface is made active
2234  * @netdev: network interface device structure
2235  *
2236  * Returns 0 on success, negative value on failure
2237  *
2238  * The open entry point is called when a network interface is made
2239  * active by the system (IFF_UP).  At this point all resources needed
2240  * for transmit and receive operations are allocated, the interrupt
2241  * handler is registered with the OS, the watchdog timer is started,
2242  * and the stack is notified that the interface is ready.
2243  */
2244 static int atl1c_open(struct net_device *netdev)
2245 {
2246         struct atl1c_adapter *adapter = netdev_priv(netdev);
2247         int err;
2248
2249         /* disallow open during test */
2250         if (test_bit(__AT_TESTING, &adapter->flags))
2251                 return -EBUSY;
2252
2253         /* allocate rx/tx dma buffer & descriptors */
2254         err = atl1c_setup_ring_resources(adapter);
2255         if (unlikely(err))
2256                 return err;
2257
2258         err = atl1c_up(adapter);
2259         if (unlikely(err))
2260                 goto err_up;
2261
2262         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2263                 u32 phy_data;
2264
2265                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2266                 phy_data |= MDIO_AP_EN;
2267                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2268         }
2269         return 0;
2270
2271 err_up:
2272         atl1c_free_irq(adapter);
2273         atl1c_free_ring_resources(adapter);
2274         atl1c_reset_mac(&adapter->hw);
2275         return err;
2276 }
2277
2278 /*
2279  * atl1c_close - Disables a network interface
2280  * @netdev: network interface device structure
2281  *
2282  * Returns 0, this is not allowed to fail
2283  *
2284  * The close entry point is called when an interface is de-activated
2285  * by the OS.  The hardware is still under the drivers control, but
2286  * needs to be disabled.  A global MAC reset is issued to stop the
2287  * hardware, and all transmit and receive resources are freed.
2288  */
2289 static int atl1c_close(struct net_device *netdev)
2290 {
2291         struct atl1c_adapter *adapter = netdev_priv(netdev);
2292
2293         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2294         atl1c_down(adapter);
2295         atl1c_free_ring_resources(adapter);
2296         return 0;
2297 }
2298
2299 static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2300 {
2301         struct net_device *netdev = pci_get_drvdata(pdev);
2302         struct atl1c_adapter *adapter = netdev_priv(netdev);
2303         struct atl1c_hw *hw = &adapter->hw;
2304         u32 ctrl;
2305         u32 mac_ctrl_data;
2306         u32 master_ctrl_data;
2307         u32 wol_ctrl_data;
2308         u16 mii_bmsr_data;
2309         u16 save_autoneg_advertised;
2310         u16 mii_intr_status_data;
2311         u32 wufc = adapter->wol;
2312         u32 i;
2313         int retval = 0;
2314
2315         if (netif_running(netdev)) {
2316                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2317                 atl1c_down(adapter);
2318         }
2319         netif_device_detach(netdev);
2320         atl1c_disable_l0s_l1(hw);
2321         retval = pci_save_state(pdev);
2322         if (retval)
2323                 return retval;
2324         if (wufc) {
2325                 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2326                 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2327
2328                 /* get link status */
2329                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2330                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2331                 save_autoneg_advertised = hw->autoneg_advertised;
2332                 hw->autoneg_advertised = ADVERTISED_10baseT_Half;
2333                 if (atl1c_restart_autoneg(hw) != 0)
2334                         if (netif_msg_link(adapter))
2335                                 dev_warn(&pdev->dev, "phy autoneg failed\n");
2336                 hw->phy_configured = false; /* re-init PHY when resume */
2337                 hw->autoneg_advertised = save_autoneg_advertised;
2338                 /* turn on magic packet wol */
2339                 if (wufc & AT_WUFC_MAG)
2340                         wol_ctrl_data = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2341
2342                 if (wufc & AT_WUFC_LNKC) {
2343                         for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2344                                 msleep(100);
2345                                 atl1c_read_phy_reg(hw, MII_BMSR,
2346                                         (u16 *)&mii_bmsr_data);
2347                                 if (mii_bmsr_data & BMSR_LSTATUS)
2348                                         break;
2349                         }
2350                         if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2351                                 if (netif_msg_link(adapter))
2352                                         dev_warn(&pdev->dev,
2353                                                 "%s: Link may change"
2354                                                 "when suspend\n",
2355                                                 atl1c_driver_name);
2356                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2357                         /* only link up can wake up */
2358                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2359                                 if (netif_msg_link(adapter))
2360                                         dev_err(&pdev->dev,
2361                                                 "%s: read write phy "
2362                                                 "register failed.\n",
2363                                                 atl1c_driver_name);
2364                                 goto wol_dis;
2365                         }
2366                 }
2367                 /* clear phy interrupt */
2368                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2369                 /* Config MAC Ctrl register */
2370                 mac_ctrl_data = MAC_CTRL_RX_EN;
2371                 /* set to 10/100M halt duplex */
2372                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2373                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2374                                  MAC_CTRL_PRMLEN_MASK) <<
2375                                  MAC_CTRL_PRMLEN_SHIFT);
2376
2377                 if (adapter->vlgrp)
2378                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2379
2380                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2381                 if (wufc & AT_WUFC_MAG)
2382                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2383
2384                 if (netif_msg_hw(adapter))
2385                         dev_dbg(&pdev->dev,
2386                                 "%s: suspend MAC=0x%x\n",
2387                                 atl1c_driver_name, mac_ctrl_data);
2388                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2389                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2390                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2391
2392                 /* pcie patch */
2393                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2394                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2395                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2396
2397                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2398                 goto suspend_exit;
2399         }
2400 wol_dis:
2401
2402         /* WOL disabled */
2403         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
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         atl1c_phy_disable(hw);
2411         hw->phy_configured = false; /* re-init PHY when resume */
2412
2413         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2414 suspend_exit:
2415
2416         pci_disable_device(pdev);
2417         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2418
2419         return 0;
2420 }
2421
2422 static int atl1c_resume(struct pci_dev *pdev)
2423 {
2424         struct net_device *netdev = pci_get_drvdata(pdev);
2425         struct atl1c_adapter *adapter = netdev_priv(netdev);
2426
2427         pci_set_power_state(pdev, PCI_D0);
2428         pci_restore_state(pdev);
2429         pci_enable_wake(pdev, PCI_D3hot, 0);
2430         pci_enable_wake(pdev, PCI_D3cold, 0);
2431
2432         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2433
2434         atl1c_phy_reset(&adapter->hw);
2435         atl1c_reset_mac(&adapter->hw);
2436         netif_device_attach(netdev);
2437         if (netif_running(netdev))
2438                 atl1c_up(adapter);
2439
2440         return 0;
2441 }
2442
2443 static void atl1c_shutdown(struct pci_dev *pdev)
2444 {
2445         atl1c_suspend(pdev, PMSG_SUSPEND);
2446 }
2447
2448 static const struct net_device_ops atl1c_netdev_ops = {
2449         .ndo_open               = atl1c_open,
2450         .ndo_stop               = atl1c_close,
2451         .ndo_validate_addr      = eth_validate_addr,
2452         .ndo_start_xmit         = atl1c_xmit_frame,
2453         .ndo_set_mac_address    = atl1c_set_mac_addr,
2454         .ndo_set_multicast_list = atl1c_set_multi,
2455         .ndo_change_mtu         = atl1c_change_mtu,
2456         .ndo_do_ioctl           = atl1c_ioctl,
2457         .ndo_tx_timeout         = atl1c_tx_timeout,
2458         .ndo_get_stats          = atl1c_get_stats,
2459         .ndo_vlan_rx_register   = atl1c_vlan_rx_register,
2460 #ifdef CONFIG_NET_POLL_CONTROLLER
2461         .ndo_poll_controller    = atl1c_netpoll,
2462 #endif
2463 };
2464
2465 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2466 {
2467         SET_NETDEV_DEV(netdev, &pdev->dev);
2468         pci_set_drvdata(pdev, netdev);
2469
2470         netdev->irq  = pdev->irq;
2471         netdev->netdev_ops = &atl1c_netdev_ops;
2472         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2473         atl1c_set_ethtool_ops(netdev);
2474
2475         /* TODO: add when ready */
2476         netdev->features =      NETIF_F_SG         |
2477                                 NETIF_F_HW_CSUM    |
2478                                 NETIF_F_HW_VLAN_TX |
2479                                 NETIF_F_HW_VLAN_RX |
2480                                 NETIF_F_TSO        |
2481                                 NETIF_F_TSO6;
2482         return 0;
2483 }
2484
2485 /*
2486  * atl1c_probe - Device Initialization Routine
2487  * @pdev: PCI device information struct
2488  * @ent: entry in atl1c_pci_tbl
2489  *
2490  * Returns 0 on success, negative on failure
2491  *
2492  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2493  * The OS initialization, configuring of the adapter private structure,
2494  * and a hardware reset occur.
2495  */
2496 static int __devinit atl1c_probe(struct pci_dev *pdev,
2497                                  const struct pci_device_id *ent)
2498 {
2499         struct net_device *netdev;
2500         struct atl1c_adapter *adapter;
2501         static int cards_found;
2502
2503         int err = 0;
2504
2505         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2506         err = pci_enable_device_mem(pdev);
2507         if (err) {
2508                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2509                 return err;
2510         }
2511
2512         /*
2513          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2514          * shared register for the high 32 bits, so only a single, aligned,
2515          * 4 GB physical address range can be used at a time.
2516          *
2517          * Supporting 64-bit DMA on this hardware is more trouble than it's
2518          * worth.  It is far easier to limit to 32-bit DMA than update
2519          * various kernel subsystems to support the mechanics required by a
2520          * fixed-high-32-bit system.
2521          */
2522         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2523             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2524                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2525                 goto err_dma;
2526         }
2527
2528         err = pci_request_regions(pdev, atl1c_driver_name);
2529         if (err) {
2530                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2531                 goto err_pci_reg;
2532         }
2533
2534         pci_set_master(pdev);
2535
2536         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2537         if (netdev == NULL) {
2538                 err = -ENOMEM;
2539                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2540                 goto err_alloc_etherdev;
2541         }
2542
2543         err = atl1c_init_netdev(netdev, pdev);
2544         if (err) {
2545                 dev_err(&pdev->dev, "init netdevice failed\n");
2546                 goto err_init_netdev;
2547         }
2548         adapter = netdev_priv(netdev);
2549         adapter->bd_number = cards_found;
2550         adapter->netdev = netdev;
2551         adapter->pdev = pdev;
2552         adapter->hw.adapter = adapter;
2553         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2554         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2555         if (!adapter->hw.hw_addr) {
2556                 err = -EIO;
2557                 dev_err(&pdev->dev, "cannot map device registers\n");
2558                 goto err_ioremap;
2559         }
2560         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2561
2562         /* init mii data */
2563         adapter->mii.dev = netdev;
2564         adapter->mii.mdio_read  = atl1c_mdio_read;
2565         adapter->mii.mdio_write = atl1c_mdio_write;
2566         adapter->mii.phy_id_mask = 0x1f;
2567         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2568         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2569         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2570                         (unsigned long)adapter);
2571         /* setup the private structure */
2572         err = atl1c_sw_init(adapter);
2573         if (err) {
2574                 dev_err(&pdev->dev, "net device private data init failed\n");
2575                 goto err_sw_init;
2576         }
2577         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2578                         ATL1C_PCIE_PHY_RESET);
2579
2580         /* Init GPHY as early as possible due to power saving issue  */
2581         atl1c_phy_reset(&adapter->hw);
2582
2583         err = atl1c_reset_mac(&adapter->hw);
2584         if (err) {
2585                 err = -EIO;
2586                 goto err_reset;
2587         }
2588
2589         device_init_wakeup(&pdev->dev, 1);
2590         /* reset the controller to
2591          * put the device in a known good starting state */
2592         err = atl1c_phy_init(&adapter->hw);
2593         if (err) {
2594                 err = -EIO;
2595                 goto err_reset;
2596         }
2597         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2598                 err = -EIO;
2599                 dev_err(&pdev->dev, "get mac address failed\n");
2600                 goto err_eeprom;
2601         }
2602         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2603         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2604         if (netif_msg_probe(adapter))
2605                 dev_dbg(&pdev->dev,
2606                         "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2607                         adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2608                         adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2609                         adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2610
2611         atl1c_hw_set_mac_addr(&adapter->hw);
2612         INIT_WORK(&adapter->reset_task, atl1c_reset_task);
2613         INIT_WORK(&adapter->link_chg_task, atl1c_link_chg_task);
2614         err = register_netdev(netdev);
2615         if (err) {
2616                 dev_err(&pdev->dev, "register netdevice failed\n");
2617                 goto err_register;
2618         }
2619
2620         if (netif_msg_probe(adapter))
2621                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2622         cards_found++;
2623         return 0;
2624
2625 err_reset:
2626 err_register:
2627 err_sw_init:
2628 err_eeprom:
2629         iounmap(adapter->hw.hw_addr);
2630 err_init_netdev:
2631 err_ioremap:
2632         free_netdev(netdev);
2633 err_alloc_etherdev:
2634         pci_release_regions(pdev);
2635 err_pci_reg:
2636 err_dma:
2637         pci_disable_device(pdev);
2638         return err;
2639 }
2640
2641 /*
2642  * atl1c_remove - Device Removal Routine
2643  * @pdev: PCI device information struct
2644  *
2645  * atl1c_remove is called by the PCI subsystem to alert the driver
2646  * that it should release a PCI device.  The could be caused by a
2647  * Hot-Plug event, or because the driver is going to be removed from
2648  * memory.
2649  */
2650 static void __devexit atl1c_remove(struct pci_dev *pdev)
2651 {
2652         struct net_device *netdev = pci_get_drvdata(pdev);
2653         struct atl1c_adapter *adapter = netdev_priv(netdev);
2654
2655         unregister_netdev(netdev);
2656         atl1c_phy_disable(&adapter->hw);
2657
2658         iounmap(adapter->hw.hw_addr);
2659
2660         pci_release_regions(pdev);
2661         pci_disable_device(pdev);
2662         free_netdev(netdev);
2663 }
2664
2665 /*
2666  * atl1c_io_error_detected - called when PCI error is detected
2667  * @pdev: Pointer to PCI device
2668  * @state: The current pci connection state
2669  *
2670  * This function is called after a PCI bus error affecting
2671  * this device has been detected.
2672  */
2673 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2674                                                 pci_channel_state_t state)
2675 {
2676         struct net_device *netdev = pci_get_drvdata(pdev);
2677         struct atl1c_adapter *adapter = netdev_priv(netdev);
2678
2679         netif_device_detach(netdev);
2680
2681         if (netif_running(netdev))
2682                 atl1c_down(adapter);
2683
2684         pci_disable_device(pdev);
2685
2686         /* Request a slot slot reset. */
2687         return PCI_ERS_RESULT_NEED_RESET;
2688 }
2689
2690 /*
2691  * atl1c_io_slot_reset - called after the pci bus has been reset.
2692  * @pdev: Pointer to PCI device
2693  *
2694  * Restart the card from scratch, as if from a cold-boot. Implementation
2695  * resembles the first-half of the e1000_resume routine.
2696  */
2697 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2698 {
2699         struct net_device *netdev = pci_get_drvdata(pdev);
2700         struct atl1c_adapter *adapter = netdev_priv(netdev);
2701
2702         if (pci_enable_device(pdev)) {
2703                 if (netif_msg_hw(adapter))
2704                         dev_err(&pdev->dev,
2705                                 "Cannot re-enable PCI device after reset\n");
2706                 return PCI_ERS_RESULT_DISCONNECT;
2707         }
2708         pci_set_master(pdev);
2709
2710         pci_enable_wake(pdev, PCI_D3hot, 0);
2711         pci_enable_wake(pdev, PCI_D3cold, 0);
2712
2713         atl1c_reset_mac(&adapter->hw);
2714
2715         return PCI_ERS_RESULT_RECOVERED;
2716 }
2717
2718 /*
2719  * atl1c_io_resume - called when traffic can start flowing again.
2720  * @pdev: Pointer to PCI device
2721  *
2722  * This callback is called when the error recovery driver tells us that
2723  * its OK to resume normal operation. Implementation resembles the
2724  * second-half of the atl1c_resume routine.
2725  */
2726 static void atl1c_io_resume(struct pci_dev *pdev)
2727 {
2728         struct net_device *netdev = pci_get_drvdata(pdev);
2729         struct atl1c_adapter *adapter = netdev_priv(netdev);
2730
2731         if (netif_running(netdev)) {
2732                 if (atl1c_up(adapter)) {
2733                         if (netif_msg_hw(adapter))
2734                                 dev_err(&pdev->dev,
2735                                         "Cannot bring device back up after reset\n");
2736                         return;
2737                 }
2738         }
2739
2740         netif_device_attach(netdev);
2741 }
2742
2743 static struct pci_error_handlers atl1c_err_handler = {
2744         .error_detected = atl1c_io_error_detected,
2745         .slot_reset = atl1c_io_slot_reset,
2746         .resume = atl1c_io_resume,
2747 };
2748
2749 static struct pci_driver atl1c_driver = {
2750         .name     = atl1c_driver_name,
2751         .id_table = atl1c_pci_tbl,
2752         .probe    = atl1c_probe,
2753         .remove   = __devexit_p(atl1c_remove),
2754         /* Power Managment Hooks */
2755         .suspend  = atl1c_suspend,
2756         .resume   = atl1c_resume,
2757         .shutdown = atl1c_shutdown,
2758         .err_handler = &atl1c_err_handler
2759 };
2760
2761 /*
2762  * atl1c_init_module - Driver Registration Routine
2763  *
2764  * atl1c_init_module is the first routine called when the driver is
2765  * loaded. All it does is register with the PCI subsystem.
2766  */
2767 static int __init atl1c_init_module(void)
2768 {
2769         return pci_register_driver(&atl1c_driver);
2770 }
2771
2772 /*
2773  * atl1c_exit_module - Driver Exit Cleanup Routine
2774  *
2775  * atl1c_exit_module is called just before the driver is removed
2776  * from memory.
2777  */
2778 static void __exit atl1c_exit_module(void)
2779 {
2780         pci_unregister_driver(&atl1c_driver);
2781 }
2782
2783 module_init(atl1c_init_module);
2784 module_exit(atl1c_exit_module);