git.oblomov.eu Git - linux-2.6/blob - drivers/net/atl1c/atl1c_main.c

   1 /*
   2  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1c.h"
  23
  24 #define ATL1C_DRV_VERSION "1.0.0.1-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27 #define PCI_DEVICE_ID_ATTANSIC_L2C      0x1062
  28 #define PCI_DEVICE_ID_ATTANSIC_L1C      0x1063
  29 /*
  30  * atl1c_pci_tbl - PCI Device ID Table
  31  *
  32  * Wildcard entries (PCI_ANY_ID) should come last
  33  * Last entry must be all 0s
  34  *
  35  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  36  *   Class, Class Mask, private data (not used) }
  37  */
  38 static struct pci_device_id atl1c_pci_tbl[] = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  45
  46 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(ATL1C_DRV_VERSION);
  50
  51 static int atl1c_stop_mac(struct atl1c_hw *hw);
  52 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
  53 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
  54 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  55 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
  56 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
  57 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
  58                    int *work_done, int work_to_do);
  59
  60 static const u16 atl1c_pay_load_size[] = {
  61         128, 256, 512, 1024, 2048, 4096,
  62 };
  63
  64 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
  65 {
  66         REG_MB_RFD0_PROD_IDX,
  67         REG_MB_RFD1_PROD_IDX,
  68         REG_MB_RFD2_PROD_IDX,
  69         REG_MB_RFD3_PROD_IDX
  70 };
  71
  72 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  73 {
  74         REG_RFD0_HEAD_ADDR_LO,
  75         REG_RFD1_HEAD_ADDR_LO,
  76         REG_RFD2_HEAD_ADDR_LO,
  77         REG_RFD3_HEAD_ADDR_LO
  78 };
  79
  80 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  81 {
  82         REG_RRD0_HEAD_ADDR_LO,
  83         REG_RRD1_HEAD_ADDR_LO,
  84         REG_RRD2_HEAD_ADDR_LO,
  85         REG_RRD3_HEAD_ADDR_LO
  86 };
  87
  88 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  89         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  90
  91 /*
  92  * atl1c_init_pcie - init PCIE module
  93  */
  94 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
  95 {
  96         u32 data;
  97         u32 pci_cmd;
  98         struct pci_dev *pdev = hw->adapter->pdev;
  99
 100         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 101         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 102         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 103                 PCI_COMMAND_IO);
 104         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 105
 106         /*
 107          * Clear any PowerSaveing Settings
 108          */
 109         pci_enable_wake(pdev, PCI_D3hot, 0);
 110         pci_enable_wake(pdev, PCI_D3cold, 0);
 111
 112         /*
 113          * Mask some pcie error bits
 114          */
 115         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
 116         data &= ~PCIE_UC_SERVRITY_DLP;
 117         data &= ~PCIE_UC_SERVRITY_FCP;
 118         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
 119
 120         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 121                 atl1c_disable_l0s_l1(hw);
 122         if (flag & ATL1C_PCIE_PHY_RESET)
 123                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 124         else
 125                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 126                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 127
 128         msleep(1);
 129 }
 130
 131 /*
 132  * atl1c_irq_enable - Enable default interrupt generation settings
 133  * @adapter: board private structure
 134  */
 135 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 136 {
 137         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 138                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 139                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 140                 AT_WRITE_FLUSH(&adapter->hw);
 141         }
 142 }
 143
 144 /*
 145  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 146  * @adapter: board private structure
 147  */
 148 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 149 {
 150         atomic_inc(&adapter->irq_sem);
 151         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 152         AT_WRITE_FLUSH(&adapter->hw);
 153         synchronize_irq(adapter->pdev->irq);
 154 }
 155
 156 /*
 157  * atl1c_irq_reset - reset interrupt confiure on the NIC
 158  * @adapter: board private structure
 159  */
 160 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 161 {
 162         atomic_set(&adapter->irq_sem, 1);
 163         atl1c_irq_enable(adapter);
 164 }
 165
 166 /*
 167  * atl1c_phy_config - Timer Call-back
 168  * @data: pointer to netdev cast into an unsigned long
 169  */
 170 static void atl1c_phy_config(unsigned long data)
 171 {
 172         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 173         struct atl1c_hw *hw = &adapter->hw;
 174         unsigned long flags;
 175
 176         spin_lock_irqsave(&adapter->mdio_lock, flags);
 177         atl1c_restart_autoneg(hw);
 178         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 179 }
 180
 181 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 182 {
 183
 184         WARN_ON(in_interrupt());
 185         atl1c_down(adapter);
 186         atl1c_up(adapter);
 187         clear_bit(__AT_RESETTING, &adapter->flags);
 188 }
 189
 190 static void atl1c_reset_task(struct work_struct *work)
 191 {
 192         struct atl1c_adapter *adapter;
 193         struct net_device *netdev;
 194
 195         adapter = container_of(work, struct atl1c_adapter, reset_task);
 196         netdev = adapter->netdev;
 197
 198         netif_device_detach(netdev);
 199         atl1c_down(adapter);
 200         atl1c_up(adapter);
 201         netif_device_attach(netdev);
 202 }
 203
 204 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 205 {
 206         struct atl1c_hw *hw = &adapter->hw;
 207         struct net_device *netdev = adapter->netdev;
 208         struct pci_dev    *pdev   = adapter->pdev;
 209         int err;
 210         unsigned long flags;
 211         u16 speed, duplex, phy_data;
 212
 213         spin_lock_irqsave(&adapter->mdio_lock, flags);
 214         /* MII_BMSR must read twise */
 215         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 216         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 217         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 218
 219         if ((phy_data & BMSR_LSTATUS) == 0) {
 220                 /* link down */
 221                 if (netif_carrier_ok(netdev)) {
 222                         hw->hibernate = true;
 223                         if (atl1c_stop_mac(hw) != 0)
 224                                 if (netif_msg_hw(adapter))
 225                                         dev_warn(&pdev->dev,
 226                                                 "stop mac failed\n");
 227                         atl1c_set_aspm(hw, false);
 228                 }
 229                 netif_carrier_off(netdev);
 230         } else {
 231                 /* Link Up */
 232                 hw->hibernate = false;
 233                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 234                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 235                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 236                 if (unlikely(err))
 237                         return;
 238                 /* link result is our setting */
 239                 if (adapter->link_speed != speed ||
 240                     adapter->link_duplex != duplex) {
 241                         adapter->link_speed  = speed;
 242                         adapter->link_duplex = duplex;
 243                         atl1c_set_aspm(hw, true);
 244                         atl1c_enable_tx_ctrl(hw);
 245                         atl1c_enable_rx_ctrl(hw);
 246                         atl1c_setup_mac_ctrl(adapter);
 247                         if (netif_msg_link(adapter))
 248                                 dev_info(&pdev->dev,
 249                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 250                                         atl1c_driver_name, netdev->name,
 251                                         adapter->link_speed,
 252                                         adapter->link_duplex == FULL_DUPLEX ?
 253                                         "Full Duplex" : "Half Duplex");
 254                 }
 255                 if (!netif_carrier_ok(netdev))
 256                         netif_carrier_on(netdev);
 257         }
 258 }
 259
 260 /*
 261  * atl1c_link_chg_task - deal with link change event Out of interrupt context
 262  * @netdev: network interface device structure
 263  */
 264 static void atl1c_link_chg_task(struct work_struct *work)
 265 {
 266         struct atl1c_adapter *adapter;
 267
 268         adapter = container_of(work, struct atl1c_adapter, link_chg_task);
 269         atl1c_check_link_status(adapter);
 270 }
 271
 272 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 273 {
 274         struct net_device *netdev = adapter->netdev;
 275         struct pci_dev    *pdev   = adapter->pdev;
 276         u16 phy_data;
 277         u16 link_up;
 278
 279         spin_lock(&adapter->mdio_lock);
 280         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 281         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 282         spin_unlock(&adapter->mdio_lock);
 283         link_up = phy_data & BMSR_LSTATUS;
 284         /* notify upper layer link down ASAP */
 285         if (!link_up) {
 286                 if (netif_carrier_ok(netdev)) {
 287                         /* old link state: Up */
 288                         netif_carrier_off(netdev);
 289                         if (netif_msg_link(adapter))
 290                                 dev_info(&pdev->dev,
 291                                         "%s: %s NIC Link is Down\n",
 292                                         atl1c_driver_name, netdev->name);
 293                         adapter->link_speed = SPEED_0;
 294                 }
 295         }
 296         schedule_work(&adapter->link_chg_task);
 297 }
 298
 299 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 300 {
 301         del_timer_sync(&adapter->phy_config_timer);
 302 }
 303
 304 static void atl1c_cancel_work(struct atl1c_adapter *adapter)
 305 {
 306         cancel_work_sync(&adapter->reset_task);
 307         cancel_work_sync(&adapter->link_chg_task);
 308 }
 309
 310 /*
 311  * atl1c_tx_timeout - Respond to a Tx Hang
 312  * @netdev: network interface device structure
 313  */
 314 static void atl1c_tx_timeout(struct net_device *netdev)
 315 {
 316         struct atl1c_adapter *adapter = netdev_priv(netdev);
 317
 318         /* Do the reset outside of interrupt context */
 319         schedule_work(&adapter->reset_task);
 320 }
 321
 322 /*
 323  * atl1c_set_multi - Multicast and Promiscuous mode set
 324  * @netdev: network interface device structure
 325  *
 326  * The set_multi entry point is called whenever the multicast address
 327  * list or the network interface flags are updated.  This routine is
 328  * responsible for configuring the hardware for proper multicast,
 329  * promiscuous mode, and all-multi behavior.
 330  */
 331 static void atl1c_set_multi(struct net_device *netdev)
 332 {
 333         struct atl1c_adapter *adapter = netdev_priv(netdev);
 334         struct atl1c_hw *hw = &adapter->hw;
 335         struct dev_mc_list *mc_ptr;
 336         u32 mac_ctrl_data;
 337         u32 hash_value;
 338
 339         /* Check for Promiscuous and All Multicast modes */
 340         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 341
 342         if (netdev->flags & IFF_PROMISC) {
 343                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 344         } else if (netdev->flags & IFF_ALLMULTI) {
 345                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 346                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 347         } else {
 348                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 349         }
 350
 351         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 352
 353         /* clear the old settings from the multicast hash table */
 354         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 355         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 356
 357         /* comoute mc addresses' hash value ,and put it into hash table */
 358         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 359                 hash_value = atl1c_hash_mc_addr(hw, mc_ptr->dmi_addr);
 360                 atl1c_hash_set(hw, hash_value);
 361         }
 362 }
 363
 364 static void atl1c_vlan_rx_register(struct net_device *netdev,
 365                                    struct vlan_group *grp)
 366 {
 367         struct atl1c_adapter *adapter = netdev_priv(netdev);
 368         struct pci_dev *pdev = adapter->pdev;
 369         u32 mac_ctrl_data = 0;
 370
 371         if (netif_msg_pktdata(adapter))
 372                 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
 373
 374         atl1c_irq_disable(adapter);
 375
 376         adapter->vlgrp = grp;
 377         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 378
 379         if (grp) {
 380                 /* enable VLAN tag insert/strip */
 381                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 382         } else {
 383                 /* disable VLAN tag insert/strip */
 384                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 385         }
 386
 387         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 388         atl1c_irq_enable(adapter);
 389 }
 390
 391 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 392 {
 393         struct pci_dev *pdev = adapter->pdev;
 394
 395         if (netif_msg_pktdata(adapter))
 396                 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
 397         atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 398 }
 399 /*
 400  * atl1c_set_mac - Change the Ethernet Address of the NIC
 401  * @netdev: network interface device structure
 402  * @p: pointer to an address structure
 403  *
 404  * Returns 0 on success, negative on failure
 405  */
 406 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 407 {
 408         struct atl1c_adapter *adapter = netdev_priv(netdev);
 409         struct sockaddr *addr = p;
 410
 411         if (!is_valid_ether_addr(addr->sa_data))
 412                 return -EADDRNOTAVAIL;
 413
 414         if (netif_running(netdev))
 415                 return -EBUSY;
 416
 417         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 418         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 419
 420         atl1c_hw_set_mac_addr(&adapter->hw);
 421
 422         return 0;
 423 }
 424
 425 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 426                                 struct net_device *dev)
 427 {
 428         int mtu = dev->mtu;
 429
 430         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 431                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 432 }
 433 /*
 434  * atl1c_change_mtu - Change the Maximum Transfer Unit
 435  * @netdev: network interface device structure
 436  * @new_mtu: new value for maximum frame size
 437  *
 438  * Returns 0 on success, negative on failure
 439  */
 440 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 441 {
 442         struct atl1c_adapter *adapter = netdev_priv(netdev);
 443         int old_mtu   = netdev->mtu;
 444         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 445
 446         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 447                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 448                 if (netif_msg_link(adapter))
 449                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 450                 return -EINVAL;
 451         }
 452         /* set MTU */
 453         if (old_mtu != new_mtu && netif_running(netdev)) {
 454                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 455                         msleep(1);
 456                 netdev->mtu = new_mtu;
 457                 adapter->hw.max_frame_size = new_mtu;
 458                 atl1c_set_rxbufsize(adapter, netdev);
 459                 atl1c_down(adapter);
 460                 atl1c_up(adapter);
 461                 clear_bit(__AT_RESETTING, &adapter->flags);
 462                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 463                         u32 phy_data;
 464
 465                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 466                         phy_data |= 0x10000000;
 467                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 468                 }
 469
 470         }
 471         return 0;
 472 }
 473
 474 /*
 475  *  caller should hold mdio_lock
 476  */
 477 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 478 {
 479         struct atl1c_adapter *adapter = netdev_priv(netdev);
 480         u16 result;
 481
 482         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 483         return result;
 484 }
 485
 486 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 487                              int reg_num, int val)
 488 {
 489         struct atl1c_adapter *adapter = netdev_priv(netdev);
 490
 491         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 492 }
 493
 494 /*
 495  * atl1c_mii_ioctl -
 496  * @netdev:
 497  * @ifreq:
 498  * @cmd:
 499  */
 500 static int atl1c_mii_ioctl(struct net_device *netdev,
 501                            struct ifreq *ifr, int cmd)
 502 {
 503         struct atl1c_adapter *adapter = netdev_priv(netdev);
 504         struct pci_dev *pdev = adapter->pdev;
 505         struct mii_ioctl_data *data = if_mii(ifr);
 506         unsigned long flags;
 507         int retval = 0;
 508
 509         if (!netif_running(netdev))
 510                 return -EINVAL;
 511
 512         spin_lock_irqsave(&adapter->mdio_lock, flags);
 513         switch (cmd) {
 514         case SIOCGMIIPHY:
 515                 data->phy_id = 0;
 516                 break;
 517
 518         case SIOCGMIIREG:
 519                 if (!capable(CAP_NET_ADMIN)) {
 520                         retval = -EPERM;
 521                         goto out;
 522                 }
 523                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 524                                     &data->val_out)) {
 525                         retval = -EIO;
 526                         goto out;
 527                 }
 528                 break;
 529
 530         case SIOCSMIIREG:
 531                 if (!capable(CAP_NET_ADMIN)) {
 532                         retval = -EPERM;
 533                         goto out;
 534                 }
 535                 if (data->reg_num & ~(0x1F)) {
 536                         retval = -EFAULT;
 537                         goto out;
 538                 }
 539
 540                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 541                                 data->reg_num, data->val_in);
 542                 if (atl1c_write_phy_reg(&adapter->hw,
 543                                      data->reg_num, data->val_in)) {
 544                         retval = -EIO;
 545                         goto out;
 546                 }
 547                 break;
 548
 549         default:
 550                 retval = -EOPNOTSUPP;
 551                 break;
 552         }
 553 out:
 554         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 555         return retval;
 556 }
 557
 558 /*
 559  * atl1c_ioctl -
 560  * @netdev:
 561  * @ifreq:
 562  * @cmd:
 563  */
 564 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 565 {
 566         switch (cmd) {
 567         case SIOCGMIIPHY:
 568         case SIOCGMIIREG:
 569         case SIOCSMIIREG:
 570                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 571         default:
 572                 return -EOPNOTSUPP;
 573         }
 574 }
 575
 576 /*
 577  * atl1c_alloc_queues - Allocate memory for all rings
 578  * @adapter: board private structure to initialize
 579  *
 580  */
 581 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 582 {
 583         return 0;
 584 }
 585
 586 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 587 {
 588         switch (hw->device_id) {
 589         case PCI_DEVICE_ID_ATTANSIC_L2C:
 590                 hw->nic_type = athr_l2c;
 591                 break;
 592
 593         case PCI_DEVICE_ID_ATTANSIC_L1C:
 594                 hw->nic_type = athr_l1c;
 595                 break;
 596
 597         default:
 598                 break;
 599         }
 600 }
 601
 602 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 603 {
 604         u32 phy_status_data;
 605         u32 link_ctrl_data;
 606
 607         atl1c_set_mac_type(hw);
 608         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 609         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 610
 611         hw->ctrl_flags = ATL1C_INTR_CLEAR_ON_READ |
 612                          ATL1C_INTR_MODRT_ENABLE  |
 613                          ATL1C_RX_IPV6_CHKSUM     |
 614                          ATL1C_TXQ_MODE_ENHANCE;
 615         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 616                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 617         if (link_ctrl_data & LINK_CTRL_L1_EN)
 618                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 619
 620         if (hw->nic_type == athr_l1c) {
 621                 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 622                 hw->ctrl_flags |= ATL1C_LINK_CAP_1000M;
 623         }
 624         return 0;
 625 }
 626 /*
 627  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 628  * @adapter: board private structure to initialize
 629  *
 630  * atl1c_sw_init initializes the Adapter private data structure.
 631  * Fields are initialized based on PCI device information and
 632  * OS network device settings (MTU size).
 633  */
 634 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 635 {
 636         struct atl1c_hw *hw   = &adapter->hw;
 637         struct pci_dev  *pdev = adapter->pdev;
 638
 639         adapter->wol = 0;
 640         adapter->link_speed = SPEED_0;
 641         adapter->link_duplex = FULL_DUPLEX;
 642         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
 643         adapter->tpd_ring[0].count = 1024;
 644         adapter->rfd_ring[0].count = 512;
 645
 646         hw->vendor_id = pdev->vendor;
 647         hw->device_id = pdev->device;
 648         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 649         hw->subsystem_id = pdev->subsystem_device;
 650
 651         /* before link up, we assume hibernate is true */
 652         hw->hibernate = true;
 653         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 654         if (atl1c_setup_mac_funcs(hw) != 0) {
 655                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 656                 return -1;
 657         }
 658         hw->intr_mask = IMR_NORMAL_MASK;
 659         hw->phy_configured = false;
 660         hw->preamble_len = 7;
 661         hw->max_frame_size = adapter->netdev->mtu;
 662         if (adapter->num_rx_queues < 2) {
 663                 hw->rss_type = atl1c_rss_disable;
 664                 hw->rss_mode = atl1c_rss_mode_disable;
 665         } else {
 666                 hw->rss_type = atl1c_rss_ipv4;
 667                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
 668                 hw->rss_hash_bits = 16;
 669         }
 670         hw->autoneg_advertised = ADVERTISED_Autoneg;
 671         hw->indirect_tab = 0xE4E4E4E4;
 672         hw->base_cpu = 0;
 673
 674         hw->ict = 50000;                /* 100ms */
 675         hw->smb_timer = 200000;         /* 400ms */
 676         hw->cmb_tpd = 4;
 677         hw->cmb_tx_timer = 1;           /* 2 us  */
 678         hw->rx_imt = 200;
 679         hw->tx_imt = 1000;
 680
 681         hw->tpd_burst = 5;
 682         hw->rfd_burst = 8;
 683         hw->dma_order = atl1c_dma_ord_out;
 684         hw->dmar_block = atl1c_dma_req_1024;
 685         hw->dmaw_block = atl1c_dma_req_1024;
 686         hw->dmar_dly_cnt = 15;
 687         hw->dmaw_dly_cnt = 4;
 688
 689         if (atl1c_alloc_queues(adapter)) {
 690                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 691                 return -ENOMEM;
 692         }
 693         /* TODO */
 694         atl1c_set_rxbufsize(adapter, adapter->netdev);
 695         atomic_set(&adapter->irq_sem, 1);
 696         spin_lock_init(&adapter->mdio_lock);
 697         spin_lock_init(&adapter->tx_lock);
 698         set_bit(__AT_DOWN, &adapter->flags);
 699
 700         return 0;
 701 }
 702
 703 /*
 704  * atl1c_clean_tx_ring - Free Tx-skb
 705  * @adapter: board private structure
 706  */
 707 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 708                                 enum atl1c_trans_queue type)
 709 {
 710         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 711         struct atl1c_buffer *buffer_info;
 712         struct pci_dev *pdev = adapter->pdev;
 713         u16 index, ring_count;
 714
 715         ring_count = tpd_ring->count;
 716         for (index = 0; index < ring_count; index++) {
 717                 buffer_info = &tpd_ring->buffer_info[index];
 718                 if (buffer_info->state == ATL1_BUFFER_FREE)
 719                         continue;
 720                 if (buffer_info->dma)
 721                         pci_unmap_single(pdev, buffer_info->dma,
 722                                         buffer_info->length,
 723                                         PCI_DMA_TODEVICE);
 724                 if (buffer_info->skb)
 725                         dev_kfree_skb(buffer_info->skb);
 726                 buffer_info->dma = 0;
 727                 buffer_info->skb = NULL;
 728                 buffer_info->state = ATL1_BUFFER_FREE;
 729         }
 730
 731         /* Zero out Tx-buffers */
 732         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 733                                 ring_count);
 734         atomic_set(&tpd_ring->next_to_clean, 0);
 735         tpd_ring->next_to_use = 0;
 736 }
 737
 738 /*
 739  * atl1c_clean_rx_ring - Free rx-reservation skbs
 740  * @adapter: board private structure
 741  */
 742 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 743 {
 744         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 745         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 746         struct atl1c_buffer *buffer_info;
 747         struct pci_dev *pdev = adapter->pdev;
 748         int i, j;
 749
 750         for (i = 0; i < adapter->num_rx_queues; i++) {
 751                 for (j = 0; j < rfd_ring[i].count; j++) {
 752                         buffer_info = &rfd_ring[i].buffer_info[j];
 753                         if (buffer_info->state == ATL1_BUFFER_FREE)
 754                                 continue;
 755                         if (buffer_info->dma)
 756                                 pci_unmap_single(pdev, buffer_info->dma,
 757                                                 buffer_info->length,
 758                                                 PCI_DMA_FROMDEVICE);
 759                         if (buffer_info->skb)
 760                                 dev_kfree_skb(buffer_info->skb);
 761                         buffer_info->state = ATL1_BUFFER_FREE;
 762                         buffer_info->skb = NULL;
 763                 }
 764                 /* zero out the descriptor ring */
 765                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
 766                 rfd_ring[i].next_to_clean = 0;
 767                 rfd_ring[i].next_to_use = 0;
 768                 rrd_ring[i].next_to_use = 0;
 769                 rrd_ring[i].next_to_clean = 0;
 770         }
 771 }
 772
 773 /*
 774  * Read / Write Ptr Initialize:
 775  */
 776 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 777 {
 778         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 779         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 780         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 781         struct atl1c_buffer *buffer_info;
 782         int i, j;
 783
 784         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 785                 tpd_ring[i].next_to_use = 0;
 786                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 787                 buffer_info = tpd_ring[i].buffer_info;
 788                 for (j = 0; j < tpd_ring->count; j++)
 789                         buffer_info[i].state = ATL1_BUFFER_FREE;
 790         }
 791         for (i = 0; i < adapter->num_rx_queues; i++) {
 792                 rfd_ring[i].next_to_use = 0;
 793                 rfd_ring[i].next_to_clean = 0;
 794                 rrd_ring[i].next_to_use = 0;
 795                 rrd_ring[i].next_to_clean = 0;
 796                 for (j = 0; j < rfd_ring[i].count; j++) {
 797                         buffer_info = &rfd_ring[i].buffer_info[j];
 798                         buffer_info->state = ATL1_BUFFER_FREE;
 799                 }
 800         }
 801 }
 802
 803 /*
 804  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 805  * @adapter: board private structure
 806  *
 807  * Free all transmit software resources
 808  */
 809 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 810 {
 811         struct pci_dev *pdev = adapter->pdev;
 812
 813         pci_free_consistent(pdev, adapter->ring_header.size,
 814                                         adapter->ring_header.desc,
 815                                         adapter->ring_header.dma);
 816         adapter->ring_header.desc = NULL;
 817
 818         /* Note: just free tdp_ring.buffer_info,
 819         *  it contain rfd_ring.buffer_info, do not double free */
 820         if (adapter->tpd_ring[0].buffer_info) {
 821                 kfree(adapter->tpd_ring[0].buffer_info);
 822                 adapter->tpd_ring[0].buffer_info = NULL;
 823         }
 824 }
 825
 826 /*
 827  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 828  * @adapter: board private structure
 829  *
 830  * Return 0 on success, negative on failure
 831  */
 832 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 833 {
 834         struct pci_dev *pdev = adapter->pdev;
 835         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 836         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 837         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 838         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 839         int num_rx_queues = adapter->num_rx_queues;
 840         int size;
 841         int i;
 842         int count = 0;
 843         int rx_desc_count = 0;
 844         u32 offset = 0;
 845
 846         rrd_ring[0].count = rfd_ring[0].count;
 847         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 848                 tpd_ring[i].count = tpd_ring[0].count;
 849
 850         for (i = 1; i < adapter->num_rx_queues; i++)
 851                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
 852
 853         /* 2 tpd queue, one high priority queue,
 854          * another normal priority queue */
 855         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 856                 rfd_ring->count * num_rx_queues);
 857         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 858         if (unlikely(!tpd_ring->buffer_info)) {
 859                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 860                         size);
 861                 goto err_nomem;
 862         }
 863         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 864                 tpd_ring[i].buffer_info =
 865                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 866                 count += tpd_ring[i].count;
 867         }
 868
 869         for (i = 0; i < num_rx_queues; i++) {
 870                 rfd_ring[i].buffer_info =
 871                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 872                 count += rfd_ring[i].count;
 873                 rx_desc_count += rfd_ring[i].count;
 874         }
 875         /*
 876          * real ring DMA buffer
 877          * each ring/block may need up to 8 bytes for alignment, hence the
 878          * additional bytes tacked onto the end.
 879          */
 880         ring_header->size = size =
 881                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 882                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 883                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 884                 sizeof(struct atl1c_hw_stats) +
 885                 8 * 4 + 8 * 2 * num_rx_queues;
 886
 887         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 888                                 &ring_header->dma);
 889         if (unlikely(!ring_header->desc)) {
 890                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 891                 goto err_nomem;
 892         }
 893         memset(ring_header->desc, 0, ring_header->size);
 894         /* init TPD ring */
 895
 896         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 897         offset = tpd_ring[0].dma - ring_header->dma;
 898         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 899                 tpd_ring[i].dma = ring_header->dma + offset;
 900                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 901                 tpd_ring[i].size =
 902                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 903                 offset += roundup(tpd_ring[i].size, 8);
 904         }
 905         /* init RFD ring */
 906         for (i = 0; i < num_rx_queues; i++) {
 907                 rfd_ring[i].dma = ring_header->dma + offset;
 908                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
 909                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
 910                                 rfd_ring[i].count;
 911                 offset += roundup(rfd_ring[i].size, 8);
 912         }
 913
 914         /* init RRD ring */
 915         for (i = 0; i < num_rx_queues; i++) {
 916                 rrd_ring[i].dma = ring_header->dma + offset;
 917                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
 918                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
 919                                 rrd_ring[i].count;
 920                 offset += roundup(rrd_ring[i].size, 8);
 921         }
 922
 923         adapter->smb.dma = ring_header->dma + offset;
 924         adapter->smb.smb = (u8 *)ring_header->desc + offset;
 925         return 0;
 926
 927 err_nomem:
 928         kfree(tpd_ring->buffer_info);
 929         return -ENOMEM;
 930 }
 931
 932 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
 933 {
 934         struct atl1c_hw *hw = &adapter->hw;
 935         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
 936                                 adapter->rfd_ring;
 937         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
 938                                 adapter->rrd_ring;
 939         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
 940                                 adapter->tpd_ring;
 941         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
 942         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
 943         int i;
 944
 945         /* TPD */
 946         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
 947                         (u32)((tpd_ring[atl1c_trans_normal].dma &
 948                                 AT_DMA_HI_ADDR_MASK) >> 32));
 949         /* just enable normal priority TX queue */
 950         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
 951                         (u32)(tpd_ring[atl1c_trans_normal].dma &
 952                                 AT_DMA_LO_ADDR_MASK));
 953         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
 954                         (u32)(tpd_ring[atl1c_trans_high].dma &
 955                                 AT_DMA_LO_ADDR_MASK));
 956         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
 957                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
 958
 959
 960         /* RFD */
 961         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
 962                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
 963         for (i = 0; i < adapter->num_rx_queues; i++)
 964                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
 965                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 966
 967         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
 968                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
 969         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
 970                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
 971
 972         /* RRD */
 973         for (i = 0; i < adapter->num_rx_queues; i++)
 974                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
 975                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 976         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
 977                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
 978
 979         /* CMB */
 980         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
 981
 982         /* SMB */
 983         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
 984                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
 985         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
 986                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
 987         /* Load all of base address above */
 988         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 989 }
 990
 991 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
 992 {
 993         struct atl1c_hw *hw = &adapter->hw;
 994         u32 dev_ctrl_data;
 995         u32 max_pay_load;
 996         u16 tx_offload_thresh;
 997         u32 txq_ctrl_data;
 998         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 999
1000         extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1001         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1002         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1003                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1004         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1005         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1006                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1007         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
1008         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1009                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1010         hw->dmar_block = min(max_pay_load, hw->dmar_block);
1011
1012         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1013                         TXQ_NUM_TPD_BURST_SHIFT;
1014         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1015                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1016         txq_ctrl_data |= (atl1c_pay_load_size[hw->dmar_block] &
1017                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1018
1019         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1020 }
1021
1022 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1023 {
1024         struct atl1c_hw *hw = &adapter->hw;
1025         u32 rxq_ctrl_data;
1026
1027         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1028                         RXQ_RFD_BURST_NUM_SHIFT;
1029
1030         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1031                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1032         if (hw->rss_type == atl1c_rss_ipv4)
1033                 rxq_ctrl_data |= RSS_HASH_IPV4;
1034         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1035                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1036         if (hw->rss_type == atl1c_rss_ipv6)
1037                 rxq_ctrl_data |= RSS_HASH_IPV6;
1038         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1039                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1040         if (hw->rss_type != atl1c_rss_disable)
1041                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1042
1043         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1044                         RSS_MODE_SHIFT;
1045         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1046                         RSS_HASH_BITS_SHIFT;
1047         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1048                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_100M &
1049                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1050
1051         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1052 }
1053
1054 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1055 {
1056         struct atl1c_hw *hw = &adapter->hw;
1057
1058         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1059         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1060 }
1061
1062 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1063 {
1064         struct atl1c_hw *hw = &adapter->hw;
1065         u32 dma_ctrl_data;
1066
1067         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1068         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1069                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1070         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1071                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1072         else
1073                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1074
1075         switch (hw->dma_order) {
1076         case atl1c_dma_ord_in:
1077                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1078                 break;
1079         case atl1c_dma_ord_enh:
1080                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1081                 break;
1082         case atl1c_dma_ord_out:
1083                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1084                 break;
1085         default:
1086                 break;
1087         }
1088
1089         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1090                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1091         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1092                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1093         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1094                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1095         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1096                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1097
1098         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1099 }
1100
1101 /*
1102  * Stop the mac, transmit and receive units
1103  * hw - Struct containing variables accessed by shared code
1104  * return : 0  or  idle status (if error)
1105  */
1106 static int atl1c_stop_mac(struct atl1c_hw *hw)
1107 {
1108         u32 data;
1109         int timeout;
1110
1111         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1112         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1113                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1114         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1115
1116         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1117         data &= ~TXQ_CTRL_EN;
1118         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1119
1120         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
1121                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
1122                 if ((data & (IDLE_STATUS_RXQ_NO_IDLE |
1123                         IDLE_STATUS_TXQ_NO_IDLE)) == 0)
1124                         break;
1125                 msleep(1);
1126         }
1127
1128         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1129         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1130         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1131
1132         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
1133                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
1134                 if ((data & IDLE_STATUS_MASK) == 0)
1135                         return 0;
1136                 msleep(1);
1137         }
1138         return data;
1139 }
1140
1141 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1142 {
1143         u32 data;
1144
1145         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1146         switch (hw->adapter->num_rx_queues) {
1147         case 4:
1148                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1149                 break;
1150         case 3:
1151                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1152                 break;
1153         case 2:
1154                 data |= RXQ1_CTRL_EN;
1155                 break;
1156         default:
1157                 break;
1158         }
1159         data |= RXQ_CTRL_EN;
1160         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1161 }
1162
1163 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1164 {
1165         u32 data;
1166
1167         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1168         data |= TXQ_CTRL_EN;
1169         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1170 }
1171
1172 /*
1173  * Reset the transmit and receive units; mask and clear all interrupts.
1174  * hw - Struct containing variables accessed by shared code
1175  * return : 0  or  idle status (if error)
1176  */
1177 static int atl1c_reset_mac(struct atl1c_hw *hw)
1178 {
1179         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1180         struct pci_dev *pdev = adapter->pdev;
1181         u32 idle_status_data = 0;
1182         int timeout = 0;
1183         int ret;
1184
1185         AT_WRITE_REG(hw, REG_IMR, 0);
1186         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1187
1188         ret = atl1c_stop_mac(hw);
1189         if (ret)
1190                 return ret;
1191         /*
1192          * Issue Soft Reset to the MAC.  This will reset the chip's
1193          * transmit, receive, DMA.  It will not effect
1194          * the current PCI configuration.  The global reset bit is self-
1195          * clearing, and should clear within a microsecond.
1196          */
1197         AT_WRITE_REGW(hw, REG_MASTER_CTRL, MASTER_CTRL_SOFT_RST);
1198         AT_WRITE_FLUSH(hw);
1199         msleep(10);
1200         /* Wait at least 10ms for All module to be Idle */
1201         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
1202                 AT_READ_REG(hw, REG_IDLE_STATUS, &idle_status_data);
1203                 if ((idle_status_data & IDLE_STATUS_MASK) == 0)
1204                         break;
1205                 msleep(1);
1206         }
1207         if (timeout >= AT_HW_MAX_IDLE_DELAY) {
1208                 dev_err(&pdev->dev,
1209                         "MAC state machine cann't be idle since"
1210                         " disabled for 10ms second\n");
1211                 return -1;
1212         }
1213         return 0;
1214 }
1215
1216 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1217 {
1218         u32 pm_ctrl_data;
1219
1220         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1221         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1222                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1223         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1224         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1225         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1226         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1227         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1228
1229         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1230         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1231         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1232         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1233 }
1234
1235 /*
1236  * Set ASPM state.
1237  * Enable/disable L0s/L1 depend on link state.
1238  */
1239 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1240 {
1241         u32 pm_ctrl_data;
1242
1243         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1244
1245         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1246         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1247                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1248
1249         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1250
1251         if (linkup) {
1252                 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1253                 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1254
1255                 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1256                 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1257         } else {
1258                 pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1259                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1260                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1261                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1262
1263                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1264
1265                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1266                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1267                 else
1268                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1269         }
1270
1271         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1272 }
1273
1274 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1275 {
1276         struct atl1c_hw *hw = &adapter->hw;
1277         struct net_device *netdev = adapter->netdev;
1278         u32 mac_ctrl_data;
1279
1280         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1281         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1282
1283         if (adapter->link_duplex == FULL_DUPLEX) {
1284                 hw->mac_duplex = true;
1285                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1286         }
1287
1288         if (adapter->link_speed == SPEED_1000)
1289                 hw->mac_speed = atl1c_mac_speed_1000;
1290         else
1291                 hw->mac_speed = atl1c_mac_speed_10_100;
1292
1293         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1294                         MAC_CTRL_SPEED_SHIFT;
1295
1296         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1297         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1298                         MAC_CTRL_PRMLEN_SHIFT);
1299
1300         if (adapter->vlgrp)
1301                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1302
1303         mac_ctrl_data |= MAC_CTRL_BC_EN;
1304         if (netdev->flags & IFF_PROMISC)
1305                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1306         if (netdev->flags & IFF_ALLMULTI)
1307                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1308
1309         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1310         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1311 }
1312
1313 /*
1314  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1315  * @adapter: board private structure
1316  *
1317  * Configure the Tx /Rx unit of the MAC after a reset.
1318  */
1319 static int atl1c_configure(struct atl1c_adapter *adapter)
1320 {
1321         struct atl1c_hw *hw = &adapter->hw;
1322         u32 master_ctrl_data = 0;
1323         u32 intr_modrt_data;
1324
1325         /* clear interrupt status */
1326         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1327         /*  Clear any WOL status */
1328         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1329         /* set Interrupt Clear Timer
1330          * HW will enable self to assert interrupt event to system after
1331          * waiting x-time for software to notify it accept interrupt.
1332          */
1333         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1334                 hw->ict & INT_RETRIG_TIMER_MASK);
1335
1336         atl1c_configure_des_ring(adapter);
1337
1338         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1339                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1340                                         IRQ_MODRT_TX_TIMER_SHIFT;
1341                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1342                                         IRQ_MODRT_RX_TIMER_SHIFT;
1343                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1344                 master_ctrl_data |=
1345                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1346         }
1347
1348         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1349                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1350
1351         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1352
1353         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1354                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1355                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1356                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1357                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1358         }
1359
1360         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1361                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1362                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1363         /* set MTU */
1364         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1365                         VLAN_HLEN + ETH_FCS_LEN);
1366         /* HDS, disable */
1367         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1368
1369         atl1c_configure_tx(adapter);
1370         atl1c_configure_rx(adapter);
1371         atl1c_configure_rss(adapter);
1372         atl1c_configure_dma(adapter);
1373
1374         return 0;
1375 }
1376
1377 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1378 {
1379         u16 hw_reg_addr = 0;
1380         unsigned long *stats_item = NULL;
1381         u32 data;
1382
1383         /* update rx status */
1384         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1385         stats_item  = &adapter->hw_stats.rx_ok;
1386         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1387                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1388                 *stats_item += data;
1389                 stats_item++;
1390                 hw_reg_addr += 4;
1391         }
1392 /* update tx status */
1393         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1394         stats_item  = &adapter->hw_stats.tx_ok;
1395         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1396                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1397                 *stats_item += data;
1398                 stats_item++;
1399                 hw_reg_addr += 4;
1400         }
1401 }
1402
1403 /*
1404  * atl1c_get_stats - Get System Network Statistics
1405  * @netdev: network interface device structure
1406  *
1407  * Returns the address of the device statistics structure.
1408  * The statistics are actually updated from the timer callback.
1409  */
1410 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1411 {
1412         struct atl1c_adapter *adapter = netdev_priv(netdev);
1413         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1414         struct net_device_stats *net_stats = &adapter->net_stats;
1415
1416         atl1c_update_hw_stats(adapter);
1417         net_stats->rx_packets = hw_stats->rx_ok;
1418         net_stats->tx_packets = hw_stats->tx_ok;
1419         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1420         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1421         net_stats->multicast  = hw_stats->rx_mcast;
1422         net_stats->collisions = hw_stats->tx_1_col +
1423                                 hw_stats->tx_2_col * 2 +
1424                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1425         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1426                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1427                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1428         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1429         net_stats->rx_length_errors = hw_stats->rx_len_err;
1430         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1431         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1432         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1433
1434         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1435
1436         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1437                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1438         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1439         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1440         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1441
1442         return &adapter->net_stats;
1443 }
1444
1445 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1446 {
1447         u16 phy_data;
1448
1449         spin_lock(&adapter->mdio_lock);
1450         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1451         spin_unlock(&adapter->mdio_lock);
1452 }
1453
1454 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1455                                 enum atl1c_trans_queue type)
1456 {
1457         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1458                                 &adapter->tpd_ring[type];
1459         struct atl1c_buffer *buffer_info;
1460         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1461         u16 hw_next_to_clean;
1462         u16 shift;
1463         u32 data;
1464
1465         if (type == atl1c_trans_high)
1466                 shift = MB_HTPD_CONS_IDX_SHIFT;
1467         else
1468                 shift = MB_NTPD_CONS_IDX_SHIFT;
1469
1470         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1471         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1472
1473         while (next_to_clean != hw_next_to_clean) {
1474                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1475                 if (buffer_info->state == ATL1_BUFFER_BUSY) {
1476                         pci_unmap_page(adapter->pdev, buffer_info->dma,
1477                                         buffer_info->length, PCI_DMA_TODEVICE);
1478                         buffer_info->dma = 0;
1479                         if (buffer_info->skb) {
1480                                 dev_kfree_skb_irq(buffer_info->skb);
1481                                 buffer_info->skb = NULL;
1482                         }
1483                         buffer_info->state = ATL1_BUFFER_FREE;
1484                 }
1485                 if (++next_to_clean == tpd_ring->count)
1486                         next_to_clean = 0;
1487                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1488         }
1489
1490         if (netif_queue_stopped(adapter->netdev) &&
1491                         netif_carrier_ok(adapter->netdev)) {
1492                 netif_wake_queue(adapter->netdev);
1493         }
1494
1495         return true;
1496 }
1497
1498 /*
1499  * atl1c_intr - Interrupt Handler
1500  * @irq: interrupt number
1501  * @data: pointer to a network interface device structure
1502  * @pt_regs: CPU registers structure
1503  */
1504 static irqreturn_t atl1c_intr(int irq, void *data)
1505 {
1506         struct net_device *netdev  = data;
1507         struct atl1c_adapter *adapter = netdev_priv(netdev);
1508         struct pci_dev *pdev = adapter->pdev;
1509         struct atl1c_hw *hw = &adapter->hw;
1510         int max_ints = AT_MAX_INT_WORK;
1511         int handled = IRQ_NONE;
1512         u32 status;
1513         u32 reg_data;
1514
1515         do {
1516                 AT_READ_REG(hw, REG_ISR, &reg_data);
1517                 status = reg_data & hw->intr_mask;
1518
1519                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1520                         if (max_ints != AT_MAX_INT_WORK)
1521                                 handled = IRQ_HANDLED;
1522                         break;
1523                 }
1524                 /* link event */
1525                 if (status & ISR_GPHY)
1526                         atl1c_clear_phy_int(adapter);
1527                 /* Ack ISR */
1528                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1529                 if (status & ISR_RX_PKT) {
1530                         if (likely(napi_schedule_prep(&adapter->napi))) {
1531                                 hw->intr_mask &= ~ISR_RX_PKT;
1532                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1533                                 __napi_schedule(&adapter->napi);
1534                         }
1535                 }
1536                 if (status & ISR_TX_PKT)
1537                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1538
1539                 handled = IRQ_HANDLED;
1540                 /* check if PCIE PHY Link down */
1541                 if (status & ISR_ERROR) {
1542                         if (netif_msg_hw(adapter))
1543                                 dev_err(&pdev->dev,
1544                                         "atl1c hardware error (status = 0x%x)\n",
1545                                         status & ISR_ERROR);
1546                         /* reset MAC */
1547                         hw->intr_mask &= ~ISR_ERROR;
1548                         AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1549                         schedule_work(&adapter->reset_task);
1550                         break;
1551                 }
1552
1553                 if (status & ISR_OVER)
1554                         if (netif_msg_intr(adapter))
1555                                 dev_warn(&pdev->dev,
1556                                         "TX/RX over flow (status = 0x%x)\n",
1557                                         status & ISR_OVER);
1558
1559                 /* link event */
1560                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1561                         adapter->net_stats.tx_carrier_errors++;
1562                         atl1c_link_chg_event(adapter);
1563                         break;
1564                 }
1565
1566         } while (--max_ints > 0);
1567         /* re-enable Interrupt*/
1568         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1569         return handled;
1570 }
1571
1572 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1573                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1574 {
1575         /*
1576          * The pid field in RRS in not correct sometimes, so we
1577          * cannot figure out if the packet is fragmented or not,
1578          * so we tell the KERNEL CHECKSUM_NONE
1579          */
1580         skb->ip_summed = CHECKSUM_NONE;
1581 }
1582
1583 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1584 {
1585         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1586         struct pci_dev *pdev = adapter->pdev;
1587         struct atl1c_buffer *buffer_info, *next_info;
1588         struct sk_buff *skb;
1589         void *vir_addr = NULL;
1590         u16 num_alloc = 0;
1591         u16 rfd_next_to_use, next_next;
1592         struct atl1c_rx_free_desc *rfd_desc;
1593
1594         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1595         if (++next_next == rfd_ring->count)
1596                 next_next = 0;
1597         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1598         next_info = &rfd_ring->buffer_info[next_next];
1599
1600         while (next_info->state == ATL1_BUFFER_FREE) {
1601                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1602
1603                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1604                 if (unlikely(!skb)) {
1605                         if (netif_msg_rx_err(adapter))
1606                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1607                         break;
1608                 }
1609
1610                 /*
1611                  * Make buffer alignment 2 beyond a 16 byte boundary
1612                  * this will result in a 16 byte aligned IP header after
1613                  * the 14 byte MAC header is removed
1614                  */
1615                 vir_addr = skb->data;
1616                 buffer_info->state = ATL1_BUFFER_BUSY;
1617                 buffer_info->skb = skb;
1618                 buffer_info->length = adapter->rx_buffer_len;
1619                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1620                                                 buffer_info->length,
1621                                                 PCI_DMA_FROMDEVICE);
1622                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1623                 rfd_next_to_use = next_next;
1624                 if (++next_next == rfd_ring->count)
1625                         next_next = 0;
1626                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1627                 next_info = &rfd_ring->buffer_info[next_next];
1628                 num_alloc++;
1629         }
1630
1631         if (num_alloc) {
1632                 /* TODO: update mailbox here */
1633                 wmb();
1634                 rfd_ring->next_to_use = rfd_next_to_use;
1635                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1636                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1637         }
1638
1639         return num_alloc;
1640 }
1641
1642 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1643                         struct  atl1c_recv_ret_status *rrs, u16 num)
1644 {
1645         u16 i;
1646         /* the relationship between rrd and rfd is one map one */
1647         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1648                                         rrd_ring->next_to_clean)) {
1649                 rrs->word3 &= ~RRS_RXD_UPDATED;
1650                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1651                         rrd_ring->next_to_clean = 0;
1652         }
1653 }
1654
1655 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1656         struct atl1c_recv_ret_status *rrs, u16 num)
1657 {
1658         u16 i;
1659         u16 rfd_index;
1660         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1661
1662         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1663                         RRS_RX_RFD_INDEX_MASK;
1664         for (i = 0; i < num; i++) {
1665                 buffer_info[rfd_index].skb = NULL;
1666                 buffer_info[rfd_index].state = ATL1_BUFFER_FREE;
1667                 if (++rfd_index == rfd_ring->count)
1668                         rfd_index = 0;
1669         }
1670         rfd_ring->next_to_clean = rfd_index;
1671 }
1672
1673 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1674                    int *work_done, int work_to_do)
1675 {
1676         u16 rfd_num, rfd_index;
1677         u16 count = 0;
1678         u16 length;
1679         struct pci_dev *pdev = adapter->pdev;
1680         struct net_device *netdev  = adapter->netdev;
1681         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1682         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1683         struct sk_buff *skb;
1684         struct atl1c_recv_ret_status *rrs;
1685         struct atl1c_buffer *buffer_info;
1686
1687         while (1) {
1688                 if (*work_done >= work_to_do)
1689                         break;
1690                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1691                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1692                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1693                                 RRS_RX_RFD_CNT_MASK;
1694                         if (unlikely(rfd_num) != 1)
1695                                 /* TODO support mul rfd*/
1696                                 if (netif_msg_rx_err(adapter))
1697                                         dev_warn(&pdev->dev,
1698                                                 "Multi rfd not support yet!\n");
1699                         goto rrs_checked;
1700                 } else {
1701                         break;
1702                 }
1703 rrs_checked:
1704                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1705                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1706                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1707                                 if (netif_msg_rx_err(adapter))
1708                                         dev_warn(&pdev->dev,
1709                                                 "wrong packet! rrs word3 is %x\n",
1710                                                 rrs->word3);
1711                         continue;
1712                 }
1713
1714                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1715                                 RRS_PKT_SIZE_MASK);
1716                 /* Good Receive */
1717                 if (likely(rfd_num == 1)) {
1718                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1719                                         RRS_RX_RFD_INDEX_MASK;
1720                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1721                         pci_unmap_single(pdev, buffer_info->dma,
1722                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1723                         skb = buffer_info->skb;
1724                 } else {
1725                         /* TODO */
1726                         if (netif_msg_rx_err(adapter))
1727                                 dev_warn(&pdev->dev,
1728                                         "Multi rfd not support yet!\n");
1729                         break;
1730                 }
1731                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1732                 skb_put(skb, length - ETH_FCS_LEN);
1733                 skb->protocol = eth_type_trans(skb, netdev);
1734                 skb->dev = netdev;
1735                 atl1c_rx_checksum(adapter, skb, rrs);
1736                 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1737                         u16 vlan;
1738
1739                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1740                         vlan = le16_to_cpu(vlan);
1741                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1742                 } else
1743                         netif_receive_skb(skb);
1744
1745                 netdev->last_rx = jiffies;
1746                 (*work_done)++;
1747                 count++;
1748         }
1749         if (count)
1750                 atl1c_alloc_rx_buffer(adapter, que);
1751 }
1752
1753 /*
1754  * atl1c_clean - NAPI Rx polling callback
1755  * @adapter: board private structure
1756  */
1757 static int atl1c_clean(struct napi_struct *napi, int budget)
1758 {
1759         struct atl1c_adapter *adapter =
1760                         container_of(napi, struct atl1c_adapter, napi);
1761         int work_done = 0;
1762
1763         /* Keep link state information with original netdev */
1764         if (!netif_carrier_ok(adapter->netdev))
1765                 goto quit_polling;
1766         /* just enable one RXQ */
1767         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1768
1769         if (work_done < budget) {
1770 quit_polling:
1771                 napi_complete(napi);
1772                 adapter->hw.intr_mask |= ISR_RX_PKT;
1773                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1774         }
1775         return work_done;
1776 }
1777
1778 #ifdef CONFIG_NET_POLL_CONTROLLER
1779
1780 /*
1781  * Polling 'interrupt' - used by things like netconsole to send skbs
1782  * without having to re-enable interrupts. It's not called while
1783  * the interrupt routine is executing.
1784  */
1785 static void atl1c_netpoll(struct net_device *netdev)
1786 {
1787         struct atl1c_adapter *adapter = netdev_priv(netdev);
1788
1789         disable_irq(adapter->pdev->irq);
1790         atl1c_intr(adapter->pdev->irq, netdev);
1791         enable_irq(adapter->pdev->irq);
1792 }
1793 #endif
1794
1795 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1796 {
1797         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1798         u16 next_to_use = 0;
1799         u16 next_to_clean = 0;
1800
1801         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1802         next_to_use   = tpd_ring->next_to_use;
1803
1804         return (u16)(next_to_clean > next_to_use) ?
1805                 (next_to_clean - next_to_use - 1) :
1806                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1807 }
1808
1809 /*
1810  * get next usable tpd
1811  * Note: should call atl1c_tdp_avail to make sure
1812  * there is enough tpd to use
1813  */
1814 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1815         enum atl1c_trans_queue type)
1816 {
1817         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1818         struct atl1c_tpd_desc *tpd_desc;
1819         u16 next_to_use = 0;
1820
1821         next_to_use = tpd_ring->next_to_use;
1822         if (++tpd_ring->next_to_use == tpd_ring->count)
1823                 tpd_ring->next_to_use = 0;
1824         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1825         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1826         return  tpd_desc;
1827 }
1828
1829 static struct atl1c_buffer *
1830 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1831 {
1832         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1833
1834         return &tpd_ring->buffer_info[tpd -
1835                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1836 }
1837
1838 /* Calculate the transmit packet descript needed*/
1839 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1840 {
1841         u16 tpd_req;
1842         u16 proto_hdr_len = 0;
1843
1844         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1845
1846         if (skb_is_gso(skb)) {
1847                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1848                 if (proto_hdr_len < skb_headlen(skb))
1849                         tpd_req++;
1850                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1851                         tpd_req++;
1852         }
1853         return tpd_req;
1854 }
1855
1856 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1857                           struct sk_buff *skb,
1858                           struct atl1c_tpd_desc **tpd,
1859                           enum atl1c_trans_queue type)
1860 {
1861         struct pci_dev *pdev = adapter->pdev;
1862         u8 hdr_len;
1863         u32 real_len;
1864         unsigned short offload_type;
1865         int err;
1866
1867         if (skb_is_gso(skb)) {
1868                 if (skb_header_cloned(skb)) {
1869                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1870                         if (unlikely(err))
1871                                 return -1;
1872                 }
1873                 offload_type = skb_shinfo(skb)->gso_type;
1874
1875                 if (offload_type & SKB_GSO_TCPV4) {
1876                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1877                                         + ntohs(ip_hdr(skb)->tot_len));
1878
1879                         if (real_len < skb->len)
1880                                 pskb_trim(skb, real_len);
1881
1882                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1883                         if (unlikely(skb->len == hdr_len)) {
1884                                 /* only xsum need */
1885                                 if (netif_msg_tx_queued(adapter))
1886                                         dev_warn(&pdev->dev,
1887                                                 "IPV4 tso with zero data??\n");
1888                                 goto check_sum;
1889                         } else {
1890                                 ip_hdr(skb)->check = 0;
1891                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1892                                                         ip_hdr(skb)->saddr,
1893                                                         ip_hdr(skb)->daddr,
1894                                                         0, IPPROTO_TCP, 0);
1895                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1896                         }
1897                 }
1898
1899                 if (offload_type & SKB_GSO_TCPV6) {
1900                         struct atl1c_tpd_ext_desc *etpd =
1901                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1902
1903                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1904                         *tpd = atl1c_get_tpd(adapter, type);
1905                         ipv6_hdr(skb)->payload_len = 0;
1906                         /* check payload == 0 byte ? */
1907                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1908                         if (unlikely(skb->len == hdr_len)) {
1909                                 /* only xsum need */
1910                                 if (netif_msg_tx_queued(adapter))
1911                                         dev_warn(&pdev->dev,
1912                                                 "IPV6 tso with zero data??\n");
1913                                 goto check_sum;
1914                         } else
1915                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1916                                                 &ipv6_hdr(skb)->saddr,
1917                                                 &ipv6_hdr(skb)->daddr,
1918                                                 0, IPPROTO_TCP, 0);
1919                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1920                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1921                         etpd->pkt_len = cpu_to_le32(skb->len);
1922                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1923                 }
1924
1925                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1926                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1927                                 TPD_TCPHDR_OFFSET_SHIFT;
1928                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1929                                 TPD_MSS_SHIFT;
1930                 return 0;
1931         }
1932
1933 check_sum:
1934         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1935                 u8 css, cso;
1936                 cso = skb_transport_offset(skb);
1937
1938                 if (unlikely(cso & 0x1)) {
1939                         if (netif_msg_tx_err(adapter))
1940                                 dev_err(&adapter->pdev->dev,
1941                                         "payload offset should not an event number\n");
1942                         return -1;
1943                 } else {
1944                         css = cso + skb->csum_offset;
1945
1946                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1947                                         TPD_PLOADOFFSET_SHIFT;
1948                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1949                                         TPD_CCSUM_OFFSET_SHIFT;
1950                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1951                 }
1952         }
1953         return 0;
1954 }
1955
1956 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1957                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1958                         enum atl1c_trans_queue type)
1959 {
1960         struct atl1c_tpd_desc *use_tpd = NULL;
1961         struct atl1c_buffer *buffer_info = NULL;
1962         u16 buf_len = skb_headlen(skb);
1963         u16 map_len = 0;
1964         u16 mapped_len = 0;
1965         u16 hdr_len = 0;
1966         u16 nr_frags;
1967         u16 f;
1968         int tso;
1969
1970         nr_frags = skb_shinfo(skb)->nr_frags;
1971         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
1972         if (tso) {
1973                 /* TSO */
1974                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1975                 use_tpd = tpd;
1976
1977                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1978                 buffer_info->length = map_len;
1979                 buffer_info->dma = pci_map_single(adapter->pdev,
1980                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1981                 buffer_info->state = ATL1_BUFFER_BUSY;
1982                 mapped_len += map_len;
1983                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1984                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1985         }
1986
1987         if (mapped_len < buf_len) {
1988                 /* mapped_len == 0, means we should use the first tpd,
1989                    which is given by caller  */
1990                 if (mapped_len == 0)
1991                         use_tpd = tpd;
1992                 else {
1993                         use_tpd = atl1c_get_tpd(adapter, type);
1994                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1995                         use_tpd = atl1c_get_tpd(adapter, type);
1996                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1997                 }
1998                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1999                 buffer_info->length = buf_len - mapped_len;
2000                 buffer_info->dma =
2001                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2002                                         buffer_info->length, PCI_DMA_TODEVICE);
2003                 buffer_info->state = ATL1_BUFFER_BUSY;
2004
2005                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2006                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2007         }
2008
2009         for (f = 0; f < nr_frags; f++) {
2010                 struct skb_frag_struct *frag;
2011
2012                 frag = &skb_shinfo(skb)->frags[f];
2013
2014                 use_tpd = atl1c_get_tpd(adapter, type);
2015                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2016
2017                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2018                 buffer_info->length = frag->size;
2019                 buffer_info->dma =
2020                         pci_map_page(adapter->pdev, frag->page,
2021                                         frag->page_offset,
2022                                         buffer_info->length,
2023                                         PCI_DMA_TODEVICE);
2024                 buffer_info->state = ATL1_BUFFER_BUSY;
2025
2026                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2027                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2028         }
2029
2030         /* The last tpd */
2031         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2032         /* The last buffer info contain the skb address,
2033            so it will be free after unmap */
2034         buffer_info->skb = skb;
2035 }
2036
2037 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2038                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2039 {
2040         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2041         u32 prod_data;
2042
2043         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2044         switch (type) {
2045         case atl1c_trans_high:
2046                 prod_data &= 0xFFFF0000;
2047                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2048                 break;
2049         case atl1c_trans_normal:
2050                 prod_data &= 0x0000FFFF;
2051                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2052                 break;
2053         default:
2054                 break;
2055         }
2056         wmb();
2057         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2058 }
2059
2060 static int atl1c_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2061 {
2062         struct atl1c_adapter *adapter = netdev_priv(netdev);
2063         unsigned long flags;
2064         u16 tpd_req = 1;
2065         struct atl1c_tpd_desc *tpd;
2066         enum atl1c_trans_queue type = atl1c_trans_normal;
2067
2068         if (test_bit(__AT_DOWN, &adapter->flags)) {
2069                 dev_kfree_skb_any(skb);
2070                 return NETDEV_TX_OK;
2071         }
2072
2073         tpd_req = atl1c_cal_tpd_req(skb);
2074         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2075                 if (netif_msg_pktdata(adapter))
2076                         dev_info(&adapter->pdev->dev, "tx locked\n");
2077                 return NETDEV_TX_LOCKED;
2078         }
2079         if (skb->mark == 0x01)
2080                 type = atl1c_trans_high;
2081         else
2082                 type = atl1c_trans_normal;
2083
2084         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2085                 /* no enough descriptor, just stop queue */
2086                 netif_stop_queue(netdev);
2087                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2088                 return NETDEV_TX_BUSY;
2089         }
2090
2091         tpd = atl1c_get_tpd(adapter, type);
2092
2093         /* do TSO and check sum */
2094         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2095                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2096                 dev_kfree_skb_any(skb);
2097                 return NETDEV_TX_OK;
2098         }
2099
2100         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2101                 u16 vlan = vlan_tx_tag_get(skb);
2102                 __le16 tag;
2103
2104                 vlan = cpu_to_le16(vlan);
2105                 AT_VLAN_TO_TAG(vlan, tag);
2106                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2107                 tpd->vlan_tag = tag;
2108         }
2109
2110         if (skb_network_offset(skb) != ETH_HLEN)
2111                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2112
2113         atl1c_tx_map(adapter, skb, tpd, type);
2114         atl1c_tx_queue(adapter, skb, tpd, type);
2115
2116         netdev->trans_start = jiffies;
2117         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2118         return NETDEV_TX_OK;
2119 }
2120
2121 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2122 {
2123         struct net_device *netdev = adapter->netdev;
2124
2125         free_irq(adapter->pdev->irq, netdev);
2126
2127         if (adapter->have_msi)
2128                 pci_disable_msi(adapter->pdev);
2129 }
2130
2131 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2132 {
2133         struct pci_dev    *pdev   = adapter->pdev;
2134         struct net_device *netdev = adapter->netdev;
2135         int flags = 0;
2136         int err = 0;
2137
2138         adapter->have_msi = true;
2139         err = pci_enable_msi(adapter->pdev);
2140         if (err) {
2141                 if (netif_msg_ifup(adapter))
2142                         dev_err(&pdev->dev,
2143                                 "Unable to allocate MSI interrupt Error: %d\n",
2144                                 err);
2145                 adapter->have_msi = false;
2146         } else
2147                 netdev->irq = pdev->irq;
2148
2149         if (!adapter->have_msi)
2150                 flags |= IRQF_SHARED;
2151         err = request_irq(adapter->pdev->irq, &atl1c_intr, flags,
2152                         netdev->name, netdev);
2153         if (err) {
2154                 if (netif_msg_ifup(adapter))
2155                         dev_err(&pdev->dev,
2156                                 "Unable to allocate interrupt Error: %d\n",
2157                                 err);
2158                 if (adapter->have_msi)
2159                         pci_disable_msi(adapter->pdev);
2160                 return err;
2161         }
2162         if (netif_msg_ifup(adapter))
2163                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2164         return err;
2165 }
2166
2167 int atl1c_up(struct atl1c_adapter *adapter)
2168 {
2169         struct net_device *netdev = adapter->netdev;
2170         int num;
2171         int err;
2172         int i;
2173
2174         netif_carrier_off(netdev);
2175         atl1c_init_ring_ptrs(adapter);
2176         atl1c_set_multi(netdev);
2177         atl1c_restore_vlan(adapter);
2178
2179         for (i = 0; i < adapter->num_rx_queues; i++) {
2180                 num = atl1c_alloc_rx_buffer(adapter, i);
2181                 if (unlikely(num == 0)) {
2182                         err = -ENOMEM;
2183                         goto err_alloc_rx;
2184                 }
2185         }
2186
2187         if (atl1c_configure(adapter)) {
2188                 err = -EIO;
2189                 goto err_up;
2190         }
2191
2192         err = atl1c_request_irq(adapter);
2193         if (unlikely(err))
2194                 goto err_up;
2195
2196         clear_bit(__AT_DOWN, &adapter->flags);
2197         napi_enable(&adapter->napi);
2198         atl1c_irq_enable(adapter);
2199         atl1c_check_link_status(adapter);
2200         netif_start_queue(netdev);
2201         return err;
2202
2203 err_up:
2204 err_alloc_rx:
2205         atl1c_clean_rx_ring(adapter);
2206         return err;
2207 }
2208
2209 void atl1c_down(struct atl1c_adapter *adapter)
2210 {
2211         struct net_device *netdev = adapter->netdev;
2212
2213         atl1c_del_timer(adapter);
2214         atl1c_cancel_work(adapter);
2215
2216         /* signal that we're down so the interrupt handler does not
2217          * reschedule our watchdog timer */
2218         set_bit(__AT_DOWN, &adapter->flags);
2219         netif_carrier_off(netdev);
2220         napi_disable(&adapter->napi);
2221         atl1c_irq_disable(adapter);
2222         atl1c_free_irq(adapter);
2223         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
2224         /* reset MAC to disable all RX/TX */
2225         atl1c_reset_mac(&adapter->hw);
2226         msleep(1);
2227
2228         adapter->link_speed = SPEED_0;
2229         adapter->link_duplex = -1;
2230         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2231         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2232         atl1c_clean_rx_ring(adapter);
2233 }
2234
2235 /*
2236  * atl1c_open - Called when a network interface is made active
2237  * @netdev: network interface device structure
2238  *
2239  * Returns 0 on success, negative value on failure
2240  *
2241  * The open entry point is called when a network interface is made
2242  * active by the system (IFF_UP).  At this point all resources needed
2243  * for transmit and receive operations are allocated, the interrupt
2244  * handler is registered with the OS, the watchdog timer is started,
2245  * and the stack is notified that the interface is ready.
2246  */
2247 static int atl1c_open(struct net_device *netdev)
2248 {
2249         struct atl1c_adapter *adapter = netdev_priv(netdev);
2250         int err;
2251
2252         /* disallow open during test */
2253         if (test_bit(__AT_TESTING, &adapter->flags))
2254                 return -EBUSY;
2255
2256         /* allocate rx/tx dma buffer & descriptors */
2257         err = atl1c_setup_ring_resources(adapter);
2258         if (unlikely(err))
2259                 return err;
2260
2261         err = atl1c_up(adapter);
2262         if (unlikely(err))
2263                 goto err_up;
2264
2265         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2266                 u32 phy_data;
2267
2268                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2269                 phy_data |= MDIO_AP_EN;
2270                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2271         }
2272         return 0;
2273
2274 err_up:
2275         atl1c_free_irq(adapter);
2276         atl1c_free_ring_resources(adapter);
2277         atl1c_reset_mac(&adapter->hw);
2278         return err;
2279 }
2280
2281 /*
2282  * atl1c_close - Disables a network interface
2283  * @netdev: network interface device structure
2284  *
2285  * Returns 0, this is not allowed to fail
2286  *
2287  * The close entry point is called when an interface is de-activated
2288  * by the OS.  The hardware is still under the drivers control, but
2289  * needs to be disabled.  A global MAC reset is issued to stop the
2290  * hardware, and all transmit and receive resources are freed.
2291  */
2292 static int atl1c_close(struct net_device *netdev)
2293 {
2294         struct atl1c_adapter *adapter = netdev_priv(netdev);
2295
2296         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2297         atl1c_down(adapter);
2298         atl1c_free_ring_resources(adapter);
2299         return 0;
2300 }
2301
2302 static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2303 {
2304         struct net_device *netdev = pci_get_drvdata(pdev);
2305         struct atl1c_adapter *adapter = netdev_priv(netdev);
2306         struct atl1c_hw *hw = &adapter->hw;
2307         u32 ctrl;
2308         u32 mac_ctrl_data;
2309         u32 master_ctrl_data;
2310         u32 wol_ctrl_data;
2311         u16 mii_bmsr_data;
2312         u16 save_autoneg_advertised;
2313         u16 mii_intr_status_data;
2314         u32 wufc = adapter->wol;
2315         u32 i;
2316         int retval = 0;
2317
2318         if (netif_running(netdev)) {
2319                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2320                 atl1c_down(adapter);
2321         }
2322         netif_device_detach(netdev);
2323         atl1c_disable_l0s_l1(hw);
2324         retval = pci_save_state(pdev);
2325         if (retval)
2326                 return retval;
2327         if (wufc) {
2328                 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2329                 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2330
2331                 /* get link status */
2332                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2333                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2334                 save_autoneg_advertised = hw->autoneg_advertised;
2335                 hw->autoneg_advertised = ADVERTISED_10baseT_Half;
2336                 if (atl1c_restart_autoneg(hw) != 0)
2337                         if (netif_msg_link(adapter))
2338                                 dev_warn(&pdev->dev, "phy autoneg failed\n");
2339                 hw->phy_configured = false; /* re-init PHY when resume */
2340                 hw->autoneg_advertised = save_autoneg_advertised;
2341                 /* turn on magic packet wol */
2342                 if (wufc & AT_WUFC_MAG)
2343                         wol_ctrl_data = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2344
2345                 if (wufc & AT_WUFC_LNKC) {
2346                         for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2347                                 msleep(100);
2348                                 atl1c_read_phy_reg(hw, MII_BMSR,
2349                                         (u16 *)&mii_bmsr_data);
2350                                 if (mii_bmsr_data & BMSR_LSTATUS)
2351                                         break;
2352                         }
2353                         if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2354                                 if (netif_msg_link(adapter))
2355                                         dev_warn(&pdev->dev,
2356                                                 "%s: Link may change"
2357                                                 "when suspend\n",
2358                                                 atl1c_driver_name);
2359                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2360                         /* only link up can wake up */
2361                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2362                                 if (netif_msg_link(adapter))
2363                                         dev_err(&pdev->dev,
2364                                                 "%s: read write phy "
2365                                                 "register failed.\n",
2366                                                 atl1c_driver_name);
2367                                 goto wol_dis;
2368                         }
2369                 }
2370                 /* clear phy interrupt */
2371                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2372                 /* Config MAC Ctrl register */
2373                 mac_ctrl_data = MAC_CTRL_RX_EN;
2374                 /* set to 10/100M halt duplex */
2375                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2376                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2377                                  MAC_CTRL_PRMLEN_MASK) <<
2378                                  MAC_CTRL_PRMLEN_SHIFT);
2379
2380                 if (adapter->vlgrp)
2381                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2382
2383                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2384                 if (wufc & AT_WUFC_MAG)
2385                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2386
2387                 if (netif_msg_hw(adapter))
2388                         dev_dbg(&pdev->dev,
2389                                 "%s: suspend MAC=0x%x\n",
2390                                 atl1c_driver_name, mac_ctrl_data);
2391                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2392                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2393                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2394
2395                 /* pcie patch */
2396                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2397                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2398                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2399
2400                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2401                 goto suspend_exit;
2402         }
2403 wol_dis:
2404
2405         /* WOL disabled */
2406         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2407
2408         /* pcie patch */
2409         AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2410         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2411         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2412
2413         atl1c_phy_disable(hw);
2414         hw->phy_configured = false; /* re-init PHY when resume */
2415
2416         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2417 suspend_exit:
2418
2419         pci_disable_device(pdev);
2420         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2421
2422         return 0;
2423 }
2424
2425 static int atl1c_resume(struct pci_dev *pdev)
2426 {
2427         struct net_device *netdev = pci_get_drvdata(pdev);
2428         struct atl1c_adapter *adapter = netdev_priv(netdev);
2429
2430         pci_set_power_state(pdev, PCI_D0);
2431         pci_restore_state(pdev);
2432         pci_enable_wake(pdev, PCI_D3hot, 0);
2433         pci_enable_wake(pdev, PCI_D3cold, 0);
2434
2435         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2436
2437         atl1c_phy_reset(&adapter->hw);
2438         atl1c_reset_mac(&adapter->hw);
2439         netif_device_attach(netdev);
2440         if (netif_running(netdev))
2441                 atl1c_up(adapter);
2442
2443         return 0;
2444 }
2445
2446 static void atl1c_shutdown(struct pci_dev *pdev)
2447 {
2448         atl1c_suspend(pdev, PMSG_SUSPEND);
2449 }
2450
2451 static const struct net_device_ops atl1c_netdev_ops = {
2452         .ndo_open               = atl1c_open,
2453         .ndo_stop               = atl1c_close,
2454         .ndo_validate_addr      = eth_validate_addr,
2455         .ndo_start_xmit         = atl1c_xmit_frame,
2456         .ndo_set_mac_address    = atl1c_set_mac_addr,
2457         .ndo_set_multicast_list = atl1c_set_multi,
2458         .ndo_change_mtu         = atl1c_change_mtu,
2459         .ndo_do_ioctl           = atl1c_ioctl,
2460         .ndo_tx_timeout         = atl1c_tx_timeout,
2461         .ndo_get_stats          = atl1c_get_stats,
2462         .ndo_vlan_rx_register   = atl1c_vlan_rx_register,
2463 #ifdef CONFIG_NET_POLL_CONTROLLER
2464         .ndo_poll_controller    = atl1c_netpoll,
2465 #endif
2466 };
2467
2468 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2469 {
2470         SET_NETDEV_DEV(netdev, &pdev->dev);
2471         pci_set_drvdata(pdev, netdev);
2472
2473         netdev->irq  = pdev->irq;
2474         netdev->netdev_ops = &atl1c_netdev_ops;
2475         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2476         atl1c_set_ethtool_ops(netdev);
2477
2478         /* TODO: add when ready */
2479         netdev->features =      NETIF_F_SG         |
2480                                 NETIF_F_HW_CSUM    |
2481                                 NETIF_F_HW_VLAN_TX |
2482                                 NETIF_F_HW_VLAN_RX |
2483                                 NETIF_F_TSO        |
2484                                 NETIF_F_TSO6;
2485         return 0;
2486 }
2487
2488 /*
2489  * atl1c_probe - Device Initialization Routine
2490  * @pdev: PCI device information struct
2491  * @ent: entry in atl1c_pci_tbl
2492  *
2493  * Returns 0 on success, negative on failure
2494  *
2495  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2496  * The OS initialization, configuring of the adapter private structure,
2497  * and a hardware reset occur.
2498  */
2499 static int __devinit atl1c_probe(struct pci_dev *pdev,
2500                                  const struct pci_device_id *ent)
2501 {
2502         struct net_device *netdev;
2503         struct atl1c_adapter *adapter;
2504         static int cards_found;
2505
2506         int err = 0;
2507
2508         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2509         err = pci_enable_device_mem(pdev);
2510         if (err) {
2511                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2512                 return err;
2513         }
2514
2515         /*
2516          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2517          * shared register for the high 32 bits, so only a single, aligned,
2518          * 4 GB physical address range can be used at a time.
2519          *
2520          * Supporting 64-bit DMA on this hardware is more trouble than it's
2521          * worth.  It is far easier to limit to 32-bit DMA than update
2522          * various kernel subsystems to support the mechanics required by a
2523          * fixed-high-32-bit system.
2524          */
2525         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2526             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2527                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2528                 goto err_dma;
2529         }
2530
2531         err = pci_request_regions(pdev, atl1c_driver_name);
2532         if (err) {
2533                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2534                 goto err_pci_reg;
2535         }
2536
2537         pci_set_master(pdev);
2538
2539         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2540         if (netdev == NULL) {
2541                 err = -ENOMEM;
2542                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2543                 goto err_alloc_etherdev;
2544         }
2545
2546         err = atl1c_init_netdev(netdev, pdev);
2547         if (err) {
2548                 dev_err(&pdev->dev, "init netdevice failed\n");
2549                 goto err_init_netdev;
2550         }
2551         adapter = netdev_priv(netdev);
2552         adapter->bd_number = cards_found;
2553         adapter->netdev = netdev;
2554         adapter->pdev = pdev;
2555         adapter->hw.adapter = adapter;
2556         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2557         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2558         if (!adapter->hw.hw_addr) {
2559                 err = -EIO;
2560                 dev_err(&pdev->dev, "cannot map device registers\n");
2561                 goto err_ioremap;
2562         }
2563         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2564
2565         /* init mii data */
2566         adapter->mii.dev = netdev;
2567         adapter->mii.mdio_read  = atl1c_mdio_read;
2568         adapter->mii.mdio_write = atl1c_mdio_write;
2569         adapter->mii.phy_id_mask = 0x1f;
2570         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2571         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2572         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2573                         (unsigned long)adapter);
2574         /* setup the private structure */
2575         err = atl1c_sw_init(adapter);
2576         if (err) {
2577                 dev_err(&pdev->dev, "net device private data init failed\n");
2578                 goto err_sw_init;
2579         }
2580         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2581                         ATL1C_PCIE_PHY_RESET);
2582
2583         /* Init GPHY as early as possible due to power saving issue  */
2584         atl1c_phy_reset(&adapter->hw);
2585
2586         err = atl1c_reset_mac(&adapter->hw);
2587         if (err) {
2588                 err = -EIO;
2589                 goto err_reset;
2590         }
2591
2592         device_init_wakeup(&pdev->dev, 1);
2593         /* reset the controller to
2594          * put the device in a known good starting state */
2595         err = atl1c_phy_init(&adapter->hw);
2596         if (err) {
2597                 err = -EIO;
2598                 goto err_reset;
2599         }
2600         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2601                 err = -EIO;
2602                 dev_err(&pdev->dev, "get mac address failed\n");
2603                 goto err_eeprom;
2604         }
2605         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2606         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2607         if (netif_msg_probe(adapter))
2608                 dev_dbg(&pdev->dev,
2609                         "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2610                         adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2611                         adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2612                         adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2613
2614         atl1c_hw_set_mac_addr(&adapter->hw);
2615         INIT_WORK(&adapter->reset_task, atl1c_reset_task);
2616         INIT_WORK(&adapter->link_chg_task, atl1c_link_chg_task);
2617         err = register_netdev(netdev);
2618         if (err) {
2619                 dev_err(&pdev->dev, "register netdevice failed\n");
2620                 goto err_register;
2621         }
2622
2623         if (netif_msg_probe(adapter))
2624                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2625         cards_found++;
2626         return 0;
2627
2628 err_reset:
2629 err_register:
2630 err_sw_init:
2631 err_eeprom:
2632         iounmap(adapter->hw.hw_addr);
2633 err_init_netdev:
2634 err_ioremap:
2635         free_netdev(netdev);
2636 err_alloc_etherdev:
2637         pci_release_regions(pdev);
2638 err_pci_reg:
2639 err_dma:
2640         pci_disable_device(pdev);
2641         return err;
2642 }
2643
2644 /*
2645  * atl1c_remove - Device Removal Routine
2646  * @pdev: PCI device information struct
2647  *
2648  * atl1c_remove is called by the PCI subsystem to alert the driver
2649  * that it should release a PCI device.  The could be caused by a
2650  * Hot-Plug event, or because the driver is going to be removed from
2651  * memory.
2652  */
2653 static void __devexit atl1c_remove(struct pci_dev *pdev)
2654 {
2655         struct net_device *netdev = pci_get_drvdata(pdev);
2656         struct atl1c_adapter *adapter = netdev_priv(netdev);
2657
2658         unregister_netdev(netdev);
2659         atl1c_phy_disable(&adapter->hw);
2660
2661         iounmap(adapter->hw.hw_addr);
2662
2663         pci_release_regions(pdev);
2664         pci_disable_device(pdev);
2665         free_netdev(netdev);
2666 }
2667
2668 /*
2669  * atl1c_io_error_detected - called when PCI error is detected
2670  * @pdev: Pointer to PCI device
2671  * @state: The current pci connection state
2672  *
2673  * This function is called after a PCI bus error affecting
2674  * this device has been detected.
2675  */
2676 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2677                                                 pci_channel_state_t state)
2678 {
2679         struct net_device *netdev = pci_get_drvdata(pdev);
2680         struct atl1c_adapter *adapter = netdev_priv(netdev);
2681
2682         netif_device_detach(netdev);
2683
2684         if (netif_running(netdev))
2685                 atl1c_down(adapter);
2686
2687         pci_disable_device(pdev);
2688
2689         /* Request a slot slot reset. */
2690         return PCI_ERS_RESULT_NEED_RESET;
2691 }
2692
2693 /*
2694  * atl1c_io_slot_reset - called after the pci bus has been reset.
2695  * @pdev: Pointer to PCI device
2696  *
2697  * Restart the card from scratch, as if from a cold-boot. Implementation
2698  * resembles the first-half of the e1000_resume routine.
2699  */
2700 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2701 {
2702         struct net_device *netdev = pci_get_drvdata(pdev);
2703         struct atl1c_adapter *adapter = netdev_priv(netdev);
2704
2705         if (pci_enable_device(pdev)) {
2706                 if (netif_msg_hw(adapter))
2707                         dev_err(&pdev->dev,
2708                                 "Cannot re-enable PCI device after reset\n");
2709                 return PCI_ERS_RESULT_DISCONNECT;
2710         }
2711         pci_set_master(pdev);
2712
2713         pci_enable_wake(pdev, PCI_D3hot, 0);
2714         pci_enable_wake(pdev, PCI_D3cold, 0);
2715
2716         atl1c_reset_mac(&adapter->hw);
2717
2718         return PCI_ERS_RESULT_RECOVERED;
2719 }
2720
2721 /*
2722  * atl1c_io_resume - called when traffic can start flowing again.
2723  * @pdev: Pointer to PCI device
2724  *
2725  * This callback is called when the error recovery driver tells us that
2726  * its OK to resume normal operation. Implementation resembles the
2727  * second-half of the atl1c_resume routine.
2728  */
2729 static void atl1c_io_resume(struct pci_dev *pdev)
2730 {
2731         struct net_device *netdev = pci_get_drvdata(pdev);
2732         struct atl1c_adapter *adapter = netdev_priv(netdev);
2733
2734         if (netif_running(netdev)) {
2735                 if (atl1c_up(adapter)) {
2736                         if (netif_msg_hw(adapter))
2737                                 dev_err(&pdev->dev,
2738                                         "Cannot bring device back up after reset\n");
2739                         return;
2740                 }
2741         }
2742
2743         netif_device_attach(netdev);
2744 }
2745
2746 static struct pci_error_handlers atl1c_err_handler = {
2747         .error_detected = atl1c_io_error_detected,
2748         .slot_reset = atl1c_io_slot_reset,
2749         .resume = atl1c_io_resume,
2750 };
2751
2752 static struct pci_driver atl1c_driver = {
2753         .name     = atl1c_driver_name,
2754         .id_table = atl1c_pci_tbl,
2755         .probe    = atl1c_probe,
2756         .remove   = __devexit_p(atl1c_remove),
2757         /* Power Managment Hooks */
2758         .suspend  = atl1c_suspend,
2759         .resume   = atl1c_resume,
2760         .shutdown = atl1c_shutdown,
2761         .err_handler = &atl1c_err_handler
2762 };
2763
2764 /*
2765  * atl1c_init_module - Driver Registration Routine
2766  *
2767  * atl1c_init_module is the first routine called when the driver is
2768  * loaded. All it does is register with the PCI subsystem.
2769  */
2770 static int __init atl1c_init_module(void)
2771 {
2772         return pci_register_driver(&atl1c_driver);
2773 }
2774
2775 /*
2776  * atl1c_exit_module - Driver Exit Cleanup Routine
2777  *
2778  * atl1c_exit_module is called just before the driver is removed
2779  * from memory.
2780  */
2781 static void __exit atl1c_exit_module(void)
2782 {
2783         pci_unregister_driver(&atl1c_driver);
2784 }
2785
2786 module_init(atl1c_init_module);
2787 module_exit(atl1c_exit_module);