drivers/net/atl1c/atl1c_main.c

   1 /*
   2  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1c.h"
  23
  24 #define ATL1C_DRV_VERSION "1.0.0.1-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27 #define PCI_DEVICE_ID_ATTANSIC_L2C      0x1062
  28 #define PCI_DEVICE_ID_ATTANSIC_L1C      0x1063
  29 /*
  30  * atl1c_pci_tbl - PCI Device ID Table
  31  *
  32  * Wildcard entries (PCI_ANY_ID) should come last
  33  * Last entry must be all 0s
  34  *
  35  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  36  *   Class, Class Mask, private data (not used) }
  37  */
  38 static struct pci_device_id atl1c_pci_tbl[] = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  45
  46 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(ATL1C_DRV_VERSION);
  50
  51 static int atl1c_stop_mac(struct atl1c_hw *hw);
  52 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
  53 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
  54 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  55 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
  56 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
  57 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
  58                    int *work_done, int work_to_do);
  59
  60 static const u16 atl1c_pay_load_size[] = {
  61         128, 256, 512, 1024, 2048, 4096,
  62 };
  63
  64 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
  65 {
  66         REG_MB_RFD0_PROD_IDX,
  67         REG_MB_RFD1_PROD_IDX,
  68         REG_MB_RFD2_PROD_IDX,
  69         REG_MB_RFD3_PROD_IDX
  70 };
  71
  72 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  73 {
  74         REG_RFD0_HEAD_ADDR_LO,
  75         REG_RFD1_HEAD_ADDR_LO,
  76         REG_RFD2_HEAD_ADDR_LO,
  77         REG_RFD3_HEAD_ADDR_LO
  78 };
  79
  80 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  81 {
  82         REG_RRD0_HEAD_ADDR_LO,
  83         REG_RRD1_HEAD_ADDR_LO,
  84         REG_RRD2_HEAD_ADDR_LO,
  85         REG_RRD3_HEAD_ADDR_LO
  86 };
  87
  88 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  89         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  90
  91 /*
  92  * atl1c_init_pcie - init PCIE module
  93  */
  94 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
  95 {
  96         u32 data;
  97         u32 pci_cmd;
  98         struct pci_dev *pdev = hw->adapter->pdev;
  99
 100         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 101         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 102         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 103                 PCI_COMMAND_IO);
 104         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 105
 106         /*
 107          * Clear any PowerSaveing Settings
 108          */
 109         pci_enable_wake(pdev, PCI_D3hot, 0);
 110         pci_enable_wake(pdev, PCI_D3cold, 0);
 111
 112         /*
 113          * Mask some pcie error bits
 114          */
 115         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
 116         data &= ~PCIE_UC_SERVRITY_DLP;
 117         data &= ~PCIE_UC_SERVRITY_FCP;
 118         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
 119
 120         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 121                 atl1c_disable_l0s_l1(hw);
 122         if (flag & ATL1C_PCIE_PHY_RESET)
 123                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 124         else
 125                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 126                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 127
 128         msleep(1);
 129 }
 130
 131 /*
 132  * atl1c_irq_enable - Enable default interrupt generation settings
 133  * @adapter: board private structure
 134  */
 135 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 136 {
 137         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 138                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 139                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 140                 AT_WRITE_FLUSH(&adapter->hw);
 141         }
 142 }
 143
 144 /*
 145  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 146  * @adapter: board private structure
 147  */
 148 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 149 {
 150         atomic_inc(&adapter->irq_sem);
 151         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 152         AT_WRITE_FLUSH(&adapter->hw);
 153         synchronize_irq(adapter->pdev->irq);
 154 }
 155
 156 /*
 157  * atl1c_irq_reset - reset interrupt confiure on the NIC
 158  * @adapter: board private structure
 159  */
 160 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 161 {
 162         atomic_set(&adapter->irq_sem, 1);
 163         atl1c_irq_enable(adapter);
 164 }
 165
 166 /*
 167  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 168  * of the idle status register until the device is actually idle
 169  */
 170 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
 171 {
 172         int timeout;
 173         u32 data;
 174
 175         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 176                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 177                 if ((data & IDLE_STATUS_MASK) == 0)
 178                         return 0;
 179                 msleep(1);
 180         }
 181         return data;
 182 }
 183
 184 /*
 185  * atl1c_phy_config - Timer Call-back
 186  * @data: pointer to netdev cast into an unsigned long
 187  */
 188 static void atl1c_phy_config(unsigned long data)
 189 {
 190         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 191         struct atl1c_hw *hw = &adapter->hw;
 192         unsigned long flags;
 193
 194         spin_lock_irqsave(&adapter->mdio_lock, flags);
 195         atl1c_restart_autoneg(hw);
 196         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 197 }
 198
 199 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 200 {
 201         WARN_ON(in_interrupt());
 202         atl1c_down(adapter);
 203         atl1c_up(adapter);
 204         clear_bit(__AT_RESETTING, &adapter->flags);
 205 }
 206
 207 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 208 {
 209         struct atl1c_hw *hw = &adapter->hw;
 210         struct net_device *netdev = adapter->netdev;
 211         struct pci_dev    *pdev   = adapter->pdev;
 212         int err;
 213         unsigned long flags;
 214         u16 speed, duplex, phy_data;
 215
 216         spin_lock_irqsave(&adapter->mdio_lock, flags);
 217         /* MII_BMSR must read twise */
 218         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 219         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 220         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 221
 222         if ((phy_data & BMSR_LSTATUS) == 0) {
 223                 /* link down */
 224                 if (netif_carrier_ok(netdev)) {
 225                         hw->hibernate = true;
 226                         if (atl1c_stop_mac(hw) != 0)
 227                                 if (netif_msg_hw(adapter))
 228                                         dev_warn(&pdev->dev,
 229                                                 "stop mac failed\n");
 230                         atl1c_set_aspm(hw, false);
 231                 }
 232                 netif_carrier_off(netdev);
 233         } else {
 234                 /* Link Up */
 235                 hw->hibernate = false;
 236                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 237                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 238                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 239                 if (unlikely(err))
 240                         return;
 241                 /* link result is our setting */
 242                 if (adapter->link_speed != speed ||
 243                     adapter->link_duplex != duplex) {
 244                         adapter->link_speed  = speed;
 245                         adapter->link_duplex = duplex;
 246                         atl1c_set_aspm(hw, true);
 247                         atl1c_enable_tx_ctrl(hw);
 248                         atl1c_enable_rx_ctrl(hw);
 249                         atl1c_setup_mac_ctrl(adapter);
 250                         if (netif_msg_link(adapter))
 251                                 dev_info(&pdev->dev,
 252                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 253                                         atl1c_driver_name, netdev->name,
 254                                         adapter->link_speed,
 255                                         adapter->link_duplex == FULL_DUPLEX ?
 256                                         "Full Duplex" : "Half Duplex");
 257                 }
 258                 if (!netif_carrier_ok(netdev))
 259                         netif_carrier_on(netdev);
 260         }
 261 }
 262
 263 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 264 {
 265         struct net_device *netdev = adapter->netdev;
 266         struct pci_dev    *pdev   = adapter->pdev;
 267         u16 phy_data;
 268         u16 link_up;
 269
 270         spin_lock(&adapter->mdio_lock);
 271         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 272         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 273         spin_unlock(&adapter->mdio_lock);
 274         link_up = phy_data & BMSR_LSTATUS;
 275         /* notify upper layer link down ASAP */
 276         if (!link_up) {
 277                 if (netif_carrier_ok(netdev)) {
 278                         /* old link state: Up */
 279                         netif_carrier_off(netdev);
 280                         if (netif_msg_link(adapter))
 281                                 dev_info(&pdev->dev,
 282                                         "%s: %s NIC Link is Down\n",
 283                                         atl1c_driver_name, netdev->name);
 284                         adapter->link_speed = SPEED_0;
 285                 }
 286         }
 287
 288         adapter->work_event |= ATL1C_WORK_EVENT_LINK_CHANGE;
 289         schedule_work(&adapter->common_task);
 290 }
 291
 292 static void atl1c_common_task(struct work_struct *work)
 293 {
 294         struct atl1c_adapter *adapter;
 295         struct net_device *netdev;
 296
 297         adapter = container_of(work, struct atl1c_adapter, common_task);
 298         netdev = adapter->netdev;
 299
 300         if (adapter->work_event & ATL1C_WORK_EVENT_RESET) {
 301                 netif_device_detach(netdev);
 302                 atl1c_down(adapter);
 303                 atl1c_up(adapter);
 304                 netif_device_attach(netdev);
 305                 return;
 306         }
 307
 308         if (adapter->work_event & ATL1C_WORK_EVENT_LINK_CHANGE)
 309                 atl1c_check_link_status(adapter);
 310
 311         return;
 312 }
 313
 314
 315 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 316 {
 317         del_timer_sync(&adapter->phy_config_timer);
 318 }
 319
 320
 321 /*
 322  * atl1c_tx_timeout - Respond to a Tx Hang
 323  * @netdev: network interface device structure
 324  */
 325 static void atl1c_tx_timeout(struct net_device *netdev)
 326 {
 327         struct atl1c_adapter *adapter = netdev_priv(netdev);
 328
 329         /* Do the reset outside of interrupt context */
 330         adapter->work_event |= ATL1C_WORK_EVENT_RESET;
 331         schedule_work(&adapter->common_task);
 332 }
 333
 334 /*
 335  * atl1c_set_multi - Multicast and Promiscuous mode set
 336  * @netdev: network interface device structure
 337  *
 338  * The set_multi entry point is called whenever the multicast address
 339  * list or the network interface flags are updated.  This routine is
 340  * responsible for configuring the hardware for proper multicast,
 341  * promiscuous mode, and all-multi behavior.
 342  */
 343 static void atl1c_set_multi(struct net_device *netdev)
 344 {
 345         struct atl1c_adapter *adapter = netdev_priv(netdev);
 346         struct atl1c_hw *hw = &adapter->hw;
 347         struct dev_mc_list *mc_ptr;
 348         u32 mac_ctrl_data;
 349         u32 hash_value;
 350
 351         /* Check for Promiscuous and All Multicast modes */
 352         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 353
 354         if (netdev->flags & IFF_PROMISC) {
 355                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 356         } else if (netdev->flags & IFF_ALLMULTI) {
 357                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 358                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 359         } else {
 360                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 361         }
 362
 363         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 364
 365         /* clear the old settings from the multicast hash table */
 366         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 367         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 368
 369         /* comoute mc addresses' hash value ,and put it into hash table */
 370         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 371                 hash_value = atl1c_hash_mc_addr(hw, mc_ptr->dmi_addr);
 372                 atl1c_hash_set(hw, hash_value);
 373         }
 374 }
 375
 376 static void atl1c_vlan_rx_register(struct net_device *netdev,
 377                                    struct vlan_group *grp)
 378 {
 379         struct atl1c_adapter *adapter = netdev_priv(netdev);
 380         struct pci_dev *pdev = adapter->pdev;
 381         u32 mac_ctrl_data = 0;
 382
 383         if (netif_msg_pktdata(adapter))
 384                 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
 385
 386         atl1c_irq_disable(adapter);
 387
 388         adapter->vlgrp = grp;
 389         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 390
 391         if (grp) {
 392                 /* enable VLAN tag insert/strip */
 393                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 394         } else {
 395                 /* disable VLAN tag insert/strip */
 396                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 397         }
 398
 399         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 400         atl1c_irq_enable(adapter);
 401 }
 402
 403 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 404 {
 405         struct pci_dev *pdev = adapter->pdev;
 406
 407         if (netif_msg_pktdata(adapter))
 408                 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
 409         atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 410 }
 411 /*
 412  * atl1c_set_mac - Change the Ethernet Address of the NIC
 413  * @netdev: network interface device structure
 414  * @p: pointer to an address structure
 415  *
 416  * Returns 0 on success, negative on failure
 417  */
 418 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 419 {
 420         struct atl1c_adapter *adapter = netdev_priv(netdev);
 421         struct sockaddr *addr = p;
 422
 423         if (!is_valid_ether_addr(addr->sa_data))
 424                 return -EADDRNOTAVAIL;
 425
 426         if (netif_running(netdev))
 427                 return -EBUSY;
 428
 429         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 430         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 431
 432         atl1c_hw_set_mac_addr(&adapter->hw);
 433
 434         return 0;
 435 }
 436
 437 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 438                                 struct net_device *dev)
 439 {
 440         int mtu = dev->mtu;
 441
 442         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 443                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 444 }
 445 /*
 446  * atl1c_change_mtu - Change the Maximum Transfer Unit
 447  * @netdev: network interface device structure
 448  * @new_mtu: new value for maximum frame size
 449  *
 450  * Returns 0 on success, negative on failure
 451  */
 452 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 453 {
 454         struct atl1c_adapter *adapter = netdev_priv(netdev);
 455         int old_mtu   = netdev->mtu;
 456         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 457
 458         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 459                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 460                 if (netif_msg_link(adapter))
 461                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 462                 return -EINVAL;
 463         }
 464         /* set MTU */
 465         if (old_mtu != new_mtu && netif_running(netdev)) {
 466                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 467                         msleep(1);
 468                 netdev->mtu = new_mtu;
 469                 adapter->hw.max_frame_size = new_mtu;
 470                 atl1c_set_rxbufsize(adapter, netdev);
 471                 atl1c_down(adapter);
 472                 atl1c_up(adapter);
 473                 clear_bit(__AT_RESETTING, &adapter->flags);
 474                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 475                         u32 phy_data;
 476
 477                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 478                         phy_data |= 0x10000000;
 479                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 480                 }
 481
 482         }
 483         return 0;
 484 }
 485
 486 /*
 487  *  caller should hold mdio_lock
 488  */
 489 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 490 {
 491         struct atl1c_adapter *adapter = netdev_priv(netdev);
 492         u16 result;
 493
 494         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 495         return result;
 496 }
 497
 498 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 499                              int reg_num, int val)
 500 {
 501         struct atl1c_adapter *adapter = netdev_priv(netdev);
 502
 503         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 504 }
 505
 506 /*
 507  * atl1c_mii_ioctl -
 508  * @netdev:
 509  * @ifreq:
 510  * @cmd:
 511  */
 512 static int atl1c_mii_ioctl(struct net_device *netdev,
 513                            struct ifreq *ifr, int cmd)
 514 {
 515         struct atl1c_adapter *adapter = netdev_priv(netdev);
 516         struct pci_dev *pdev = adapter->pdev;
 517         struct mii_ioctl_data *data = if_mii(ifr);
 518         unsigned long flags;
 519         int retval = 0;
 520
 521         if (!netif_running(netdev))
 522                 return -EINVAL;
 523
 524         spin_lock_irqsave(&adapter->mdio_lock, flags);
 525         switch (cmd) {
 526         case SIOCGMIIPHY:
 527                 data->phy_id = 0;
 528                 break;
 529
 530         case SIOCGMIIREG:
 531                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 532                                     &data->val_out)) {
 533                         retval = -EIO;
 534                         goto out;
 535                 }
 536                 break;
 537
 538         case SIOCSMIIREG:
 539                 if (data->reg_num & ~(0x1F)) {
 540                         retval = -EFAULT;
 541                         goto out;
 542                 }
 543
 544                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 545                                 data->reg_num, data->val_in);
 546                 if (atl1c_write_phy_reg(&adapter->hw,
 547                                      data->reg_num, data->val_in)) {
 548                         retval = -EIO;
 549                         goto out;
 550                 }
 551                 break;
 552
 553         default:
 554                 retval = -EOPNOTSUPP;
 555                 break;
 556         }
 557 out:
 558         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 559         return retval;
 560 }
 561
 562 /*
 563  * atl1c_ioctl -
 564  * @netdev:
 565  * @ifreq:
 566  * @cmd:
 567  */
 568 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 569 {
 570         switch (cmd) {
 571         case SIOCGMIIPHY:
 572         case SIOCGMIIREG:
 573         case SIOCSMIIREG:
 574                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 575         default:
 576                 return -EOPNOTSUPP;
 577         }
 578 }
 579
 580 /*
 581  * atl1c_alloc_queues - Allocate memory for all rings
 582  * @adapter: board private structure to initialize
 583  *
 584  */
 585 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 586 {
 587         return 0;
 588 }
 589
 590 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 591 {
 592         switch (hw->device_id) {
 593         case PCI_DEVICE_ID_ATTANSIC_L2C:
 594                 hw->nic_type = athr_l2c;
 595                 break;
 596
 597         case PCI_DEVICE_ID_ATTANSIC_L1C:
 598                 hw->nic_type = athr_l1c;
 599                 break;
 600
 601         default:
 602                 break;
 603         }
 604 }
 605
 606 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 607 {
 608         u32 phy_status_data;
 609         u32 link_ctrl_data;
 610
 611         atl1c_set_mac_type(hw);
 612         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 613         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 614
 615         hw->ctrl_flags = ATL1C_INTR_CLEAR_ON_READ |
 616                          ATL1C_INTR_MODRT_ENABLE  |
 617                          ATL1C_RX_IPV6_CHKSUM     |
 618                          ATL1C_TXQ_MODE_ENHANCE;
 619         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 620                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 621         if (link_ctrl_data & LINK_CTRL_L1_EN)
 622                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 623
 624         if (hw->nic_type == athr_l1c) {
 625                 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 626                 hw->ctrl_flags |= ATL1C_LINK_CAP_1000M;
 627         }
 628         return 0;
 629 }
 630 /*
 631  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 632  * @adapter: board private structure to initialize
 633  *
 634  * atl1c_sw_init initializes the Adapter private data structure.
 635  * Fields are initialized based on PCI device information and
 636  * OS network device settings (MTU size).
 637  */
 638 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 639 {
 640         struct atl1c_hw *hw   = &adapter->hw;
 641         struct pci_dev  *pdev = adapter->pdev;
 642
 643         adapter->wol = 0;
 644         adapter->link_speed = SPEED_0;
 645         adapter->link_duplex = FULL_DUPLEX;
 646         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
 647         adapter->tpd_ring[0].count = 1024;
 648         adapter->rfd_ring[0].count = 512;
 649
 650         hw->vendor_id = pdev->vendor;
 651         hw->device_id = pdev->device;
 652         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 653         hw->subsystem_id = pdev->subsystem_device;
 654
 655         /* before link up, we assume hibernate is true */
 656         hw->hibernate = true;
 657         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 658         if (atl1c_setup_mac_funcs(hw) != 0) {
 659                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 660                 return -1;
 661         }
 662         hw->intr_mask = IMR_NORMAL_MASK;
 663         hw->phy_configured = false;
 664         hw->preamble_len = 7;
 665         hw->max_frame_size = adapter->netdev->mtu;
 666         if (adapter->num_rx_queues < 2) {
 667                 hw->rss_type = atl1c_rss_disable;
 668                 hw->rss_mode = atl1c_rss_mode_disable;
 669         } else {
 670                 hw->rss_type = atl1c_rss_ipv4;
 671                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
 672                 hw->rss_hash_bits = 16;
 673         }
 674         hw->autoneg_advertised = ADVERTISED_Autoneg;
 675         hw->indirect_tab = 0xE4E4E4E4;
 676         hw->base_cpu = 0;
 677
 678         hw->ict = 50000;                /* 100ms */
 679         hw->smb_timer = 200000;         /* 400ms */
 680         hw->cmb_tpd = 4;
 681         hw->cmb_tx_timer = 1;           /* 2 us  */
 682         hw->rx_imt = 200;
 683         hw->tx_imt = 1000;
 684
 685         hw->tpd_burst = 5;
 686         hw->rfd_burst = 8;
 687         hw->dma_order = atl1c_dma_ord_out;
 688         hw->dmar_block = atl1c_dma_req_1024;
 689         hw->dmaw_block = atl1c_dma_req_1024;
 690         hw->dmar_dly_cnt = 15;
 691         hw->dmaw_dly_cnt = 4;
 692
 693         if (atl1c_alloc_queues(adapter)) {
 694                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 695                 return -ENOMEM;
 696         }
 697         /* TODO */
 698         atl1c_set_rxbufsize(adapter, adapter->netdev);
 699         atomic_set(&adapter->irq_sem, 1);
 700         spin_lock_init(&adapter->mdio_lock);
 701         spin_lock_init(&adapter->tx_lock);
 702         set_bit(__AT_DOWN, &adapter->flags);
 703
 704         return 0;
 705 }
 706
 707 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 708                                 struct atl1c_buffer *buffer_info, int in_irq)
 709 {
 710         u16 pci_driection;
 711         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 712                 return;
 713         if (buffer_info->dma) {
 714                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 715                         pci_driection = PCI_DMA_FROMDEVICE;
 716                 else
 717                         pci_driection = PCI_DMA_TODEVICE;
 718
 719                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 720                         pci_unmap_single(pdev, buffer_info->dma,
 721                                         buffer_info->length, pci_driection);
 722                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 723                         pci_unmap_page(pdev, buffer_info->dma,
 724                                         buffer_info->length, pci_driection);
 725         }
 726         if (buffer_info->skb) {
 727                 if (in_irq)
 728                         dev_kfree_skb_irq(buffer_info->skb);
 729                 else
 730                         dev_kfree_skb(buffer_info->skb);
 731         }
 732         buffer_info->dma = 0;
 733         buffer_info->skb = NULL;
 734         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 735 }
 736 /*
 737  * atl1c_clean_tx_ring - Free Tx-skb
 738  * @adapter: board private structure
 739  */
 740 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 741                                 enum atl1c_trans_queue type)
 742 {
 743         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 744         struct atl1c_buffer *buffer_info;
 745         struct pci_dev *pdev = adapter->pdev;
 746         u16 index, ring_count;
 747
 748         ring_count = tpd_ring->count;
 749         for (index = 0; index < ring_count; index++) {
 750                 buffer_info = &tpd_ring->buffer_info[index];
 751                 atl1c_clean_buffer(pdev, buffer_info, 0);
 752         }
 753
 754         /* Zero out Tx-buffers */
 755         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 756                 ring_count);
 757         atomic_set(&tpd_ring->next_to_clean, 0);
 758         tpd_ring->next_to_use = 0;
 759 }
 760
 761 /*
 762  * atl1c_clean_rx_ring - Free rx-reservation skbs
 763  * @adapter: board private structure
 764  */
 765 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 766 {
 767         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 768         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 769         struct atl1c_buffer *buffer_info;
 770         struct pci_dev *pdev = adapter->pdev;
 771         int i, j;
 772
 773         for (i = 0; i < adapter->num_rx_queues; i++) {
 774                 for (j = 0; j < rfd_ring[i].count; j++) {
 775                         buffer_info = &rfd_ring[i].buffer_info[j];
 776                         atl1c_clean_buffer(pdev, buffer_info, 0);
 777                 }
 778                 /* zero out the descriptor ring */
 779                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
 780                 rfd_ring[i].next_to_clean = 0;
 781                 rfd_ring[i].next_to_use = 0;
 782                 rrd_ring[i].next_to_use = 0;
 783                 rrd_ring[i].next_to_clean = 0;
 784         }
 785 }
 786
 787 /*
 788  * Read / Write Ptr Initialize:
 789  */
 790 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 791 {
 792         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 793         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 794         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 795         struct atl1c_buffer *buffer_info;
 796         int i, j;
 797
 798         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 799                 tpd_ring[i].next_to_use = 0;
 800                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 801                 buffer_info = tpd_ring[i].buffer_info;
 802                 for (j = 0; j < tpd_ring->count; j++)
 803                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 804                                         ATL1C_BUFFER_FREE);
 805         }
 806         for (i = 0; i < adapter->num_rx_queues; i++) {
 807                 rfd_ring[i].next_to_use = 0;
 808                 rfd_ring[i].next_to_clean = 0;
 809                 rrd_ring[i].next_to_use = 0;
 810                 rrd_ring[i].next_to_clean = 0;
 811                 for (j = 0; j < rfd_ring[i].count; j++) {
 812                         buffer_info = &rfd_ring[i].buffer_info[j];
 813                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 814                 }
 815         }
 816 }
 817
 818 /*
 819  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 820  * @adapter: board private structure
 821  *
 822  * Free all transmit software resources
 823  */
 824 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 825 {
 826         struct pci_dev *pdev = adapter->pdev;
 827
 828         pci_free_consistent(pdev, adapter->ring_header.size,
 829                                         adapter->ring_header.desc,
 830                                         adapter->ring_header.dma);
 831         adapter->ring_header.desc = NULL;
 832
 833         /* Note: just free tdp_ring.buffer_info,
 834         *  it contain rfd_ring.buffer_info, do not double free */
 835         if (adapter->tpd_ring[0].buffer_info) {
 836                 kfree(adapter->tpd_ring[0].buffer_info);
 837                 adapter->tpd_ring[0].buffer_info = NULL;
 838         }
 839 }
 840
 841 /*
 842  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 843  * @adapter: board private structure
 844  *
 845  * Return 0 on success, negative on failure
 846  */
 847 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 848 {
 849         struct pci_dev *pdev = adapter->pdev;
 850         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 851         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 852         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 853         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 854         int num_rx_queues = adapter->num_rx_queues;
 855         int size;
 856         int i;
 857         int count = 0;
 858         int rx_desc_count = 0;
 859         u32 offset = 0;
 860
 861         rrd_ring[0].count = rfd_ring[0].count;
 862         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 863                 tpd_ring[i].count = tpd_ring[0].count;
 864
 865         for (i = 1; i < adapter->num_rx_queues; i++)
 866                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
 867
 868         /* 2 tpd queue, one high priority queue,
 869          * another normal priority queue */
 870         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 871                 rfd_ring->count * num_rx_queues);
 872         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 873         if (unlikely(!tpd_ring->buffer_info)) {
 874                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 875                         size);
 876                 goto err_nomem;
 877         }
 878         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 879                 tpd_ring[i].buffer_info =
 880                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 881                 count += tpd_ring[i].count;
 882         }
 883
 884         for (i = 0; i < num_rx_queues; i++) {
 885                 rfd_ring[i].buffer_info =
 886                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 887                 count += rfd_ring[i].count;
 888                 rx_desc_count += rfd_ring[i].count;
 889         }
 890         /*
 891          * real ring DMA buffer
 892          * each ring/block may need up to 8 bytes for alignment, hence the
 893          * additional bytes tacked onto the end.
 894          */
 895         ring_header->size = size =
 896                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 897                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 898                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 899                 sizeof(struct atl1c_hw_stats) +
 900                 8 * 4 + 8 * 2 * num_rx_queues;
 901
 902         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 903                                 &ring_header->dma);
 904         if (unlikely(!ring_header->desc)) {
 905                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 906                 goto err_nomem;
 907         }
 908         memset(ring_header->desc, 0, ring_header->size);
 909         /* init TPD ring */
 910
 911         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 912         offset = tpd_ring[0].dma - ring_header->dma;
 913         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 914                 tpd_ring[i].dma = ring_header->dma + offset;
 915                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 916                 tpd_ring[i].size =
 917                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 918                 offset += roundup(tpd_ring[i].size, 8);
 919         }
 920         /* init RFD ring */
 921         for (i = 0; i < num_rx_queues; i++) {
 922                 rfd_ring[i].dma = ring_header->dma + offset;
 923                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
 924                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
 925                                 rfd_ring[i].count;
 926                 offset += roundup(rfd_ring[i].size, 8);
 927         }
 928
 929         /* init RRD ring */
 930         for (i = 0; i < num_rx_queues; i++) {
 931                 rrd_ring[i].dma = ring_header->dma + offset;
 932                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
 933                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
 934                                 rrd_ring[i].count;
 935                 offset += roundup(rrd_ring[i].size, 8);
 936         }
 937
 938         adapter->smb.dma = ring_header->dma + offset;
 939         adapter->smb.smb = (u8 *)ring_header->desc + offset;
 940         return 0;
 941
 942 err_nomem:
 943         kfree(tpd_ring->buffer_info);
 944         return -ENOMEM;
 945 }
 946
 947 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
 948 {
 949         struct atl1c_hw *hw = &adapter->hw;
 950         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
 951                                 adapter->rfd_ring;
 952         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
 953                                 adapter->rrd_ring;
 954         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
 955                                 adapter->tpd_ring;
 956         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
 957         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
 958         int i;
 959
 960         /* TPD */
 961         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
 962                         (u32)((tpd_ring[atl1c_trans_normal].dma &
 963                                 AT_DMA_HI_ADDR_MASK) >> 32));
 964         /* just enable normal priority TX queue */
 965         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
 966                         (u32)(tpd_ring[atl1c_trans_normal].dma &
 967                                 AT_DMA_LO_ADDR_MASK));
 968         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
 969                         (u32)(tpd_ring[atl1c_trans_high].dma &
 970                                 AT_DMA_LO_ADDR_MASK));
 971         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
 972                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
 973
 974
 975         /* RFD */
 976         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
 977                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
 978         for (i = 0; i < adapter->num_rx_queues; i++)
 979                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
 980                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 981
 982         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
 983                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
 984         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
 985                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
 986
 987         /* RRD */
 988         for (i = 0; i < adapter->num_rx_queues; i++)
 989                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
 990                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 991         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
 992                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
 993
 994         /* CMB */
 995         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
 996
 997         /* SMB */
 998         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
 999                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1000         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
1001                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
1002         /* Load all of base address above */
1003         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1004 }
1005
1006 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1007 {
1008         struct atl1c_hw *hw = &adapter->hw;
1009         u32 dev_ctrl_data;
1010         u32 max_pay_load;
1011         u16 tx_offload_thresh;
1012         u32 txq_ctrl_data;
1013         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
1014
1015         extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1016         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1017         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1018                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1019         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1020         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1021                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1022         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
1023         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1024                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1025         hw->dmar_block = min(max_pay_load, hw->dmar_block);
1026
1027         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1028                         TXQ_NUM_TPD_BURST_SHIFT;
1029         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1030                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1031         txq_ctrl_data |= (atl1c_pay_load_size[hw->dmar_block] &
1032                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1033
1034         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1035 }
1036
1037 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1038 {
1039         struct atl1c_hw *hw = &adapter->hw;
1040         u32 rxq_ctrl_data;
1041
1042         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1043                         RXQ_RFD_BURST_NUM_SHIFT;
1044
1045         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1046                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1047         if (hw->rss_type == atl1c_rss_ipv4)
1048                 rxq_ctrl_data |= RSS_HASH_IPV4;
1049         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1050                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1051         if (hw->rss_type == atl1c_rss_ipv6)
1052                 rxq_ctrl_data |= RSS_HASH_IPV6;
1053         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1054                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1055         if (hw->rss_type != atl1c_rss_disable)
1056                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1057
1058         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1059                         RSS_MODE_SHIFT;
1060         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1061                         RSS_HASH_BITS_SHIFT;
1062         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1063                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_100M &
1064                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1065
1066         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1067 }
1068
1069 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1070 {
1071         struct atl1c_hw *hw = &adapter->hw;
1072
1073         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1074         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1075 }
1076
1077 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1078 {
1079         struct atl1c_hw *hw = &adapter->hw;
1080         u32 dma_ctrl_data;
1081
1082         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1083         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1084                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1085         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1086                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1087         else
1088                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1089
1090         switch (hw->dma_order) {
1091         case atl1c_dma_ord_in:
1092                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1093                 break;
1094         case atl1c_dma_ord_enh:
1095                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1096                 break;
1097         case atl1c_dma_ord_out:
1098                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1099                 break;
1100         default:
1101                 break;
1102         }
1103
1104         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1105                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1106         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1107                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1108         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1109                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1110         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1111                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1112
1113         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1114 }
1115
1116 /*
1117  * Stop the mac, transmit and receive units
1118  * hw - Struct containing variables accessed by shared code
1119  * return : 0  or  idle status (if error)
1120  */
1121 static int atl1c_stop_mac(struct atl1c_hw *hw)
1122 {
1123         u32 data;
1124
1125         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1126         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1127                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1128         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1129
1130         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1131         data &= ~TXQ_CTRL_EN;
1132         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1133
1134         atl1c_wait_until_idle(hw);
1135
1136         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1137         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1138         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1139
1140         return (int)atl1c_wait_until_idle(hw);
1141 }
1142
1143 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1144 {
1145         u32 data;
1146
1147         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1148         switch (hw->adapter->num_rx_queues) {
1149         case 4:
1150                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1151                 break;
1152         case 3:
1153                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1154                 break;
1155         case 2:
1156                 data |= RXQ1_CTRL_EN;
1157                 break;
1158         default:
1159                 break;
1160         }
1161         data |= RXQ_CTRL_EN;
1162         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1163 }
1164
1165 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1166 {
1167         u32 data;
1168
1169         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1170         data |= TXQ_CTRL_EN;
1171         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1172 }
1173
1174 /*
1175  * Reset the transmit and receive units; mask and clear all interrupts.
1176  * hw - Struct containing variables accessed by shared code
1177  * return : 0  or  idle status (if error)
1178  */
1179 static int atl1c_reset_mac(struct atl1c_hw *hw)
1180 {
1181         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1182         struct pci_dev *pdev = adapter->pdev;
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
1202         if (atl1c_wait_until_idle(hw)) {
1203                 dev_err(&pdev->dev,
1204                         "MAC state machine can't be idle since"
1205                         " disabled for 10ms second\n");
1206                 return -1;
1207         }
1208         return 0;
1209 }
1210
1211 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1212 {
1213         u32 pm_ctrl_data;
1214
1215         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1216         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1217                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1218         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1219         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1220         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1221         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1222         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1223
1224         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1225         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1226         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1227         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1228 }
1229
1230 /*
1231  * Set ASPM state.
1232  * Enable/disable L0s/L1 depend on link state.
1233  */
1234 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1235 {
1236         u32 pm_ctrl_data;
1237
1238         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1239
1240         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1241         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1242                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1243
1244         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1245
1246         if (linkup) {
1247                 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1248                 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1249
1250                 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1251                 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1252         } else {
1253                 pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1254                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1255                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1256                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1257
1258                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1259
1260                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1261                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1262                 else
1263                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1264         }
1265
1266         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1267 }
1268
1269 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1270 {
1271         struct atl1c_hw *hw = &adapter->hw;
1272         struct net_device *netdev = adapter->netdev;
1273         u32 mac_ctrl_data;
1274
1275         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1276         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1277
1278         if (adapter->link_duplex == FULL_DUPLEX) {
1279                 hw->mac_duplex = true;
1280                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1281         }
1282
1283         if (adapter->link_speed == SPEED_1000)
1284                 hw->mac_speed = atl1c_mac_speed_1000;
1285         else
1286                 hw->mac_speed = atl1c_mac_speed_10_100;
1287
1288         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1289                         MAC_CTRL_SPEED_SHIFT;
1290
1291         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1292         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1293                         MAC_CTRL_PRMLEN_SHIFT);
1294
1295         if (adapter->vlgrp)
1296                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1297
1298         mac_ctrl_data |= MAC_CTRL_BC_EN;
1299         if (netdev->flags & IFF_PROMISC)
1300                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1301         if (netdev->flags & IFF_ALLMULTI)
1302                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1303
1304         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1305         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1306 }
1307
1308 /*
1309  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1310  * @adapter: board private structure
1311  *
1312  * Configure the Tx /Rx unit of the MAC after a reset.
1313  */
1314 static int atl1c_configure(struct atl1c_adapter *adapter)
1315 {
1316         struct atl1c_hw *hw = &adapter->hw;
1317         u32 master_ctrl_data = 0;
1318         u32 intr_modrt_data;
1319
1320         /* clear interrupt status */
1321         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1322         /*  Clear any WOL status */
1323         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1324         /* set Interrupt Clear Timer
1325          * HW will enable self to assert interrupt event to system after
1326          * waiting x-time for software to notify it accept interrupt.
1327          */
1328         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1329                 hw->ict & INT_RETRIG_TIMER_MASK);
1330
1331         atl1c_configure_des_ring(adapter);
1332
1333         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1334                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1335                                         IRQ_MODRT_TX_TIMER_SHIFT;
1336                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1337                                         IRQ_MODRT_RX_TIMER_SHIFT;
1338                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1339                 master_ctrl_data |=
1340                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1341         }
1342
1343         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1344                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1345
1346         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1347
1348         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1349                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1350                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1351                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1352                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1353         }
1354
1355         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1356                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1357                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1358         /* set MTU */
1359         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1360                         VLAN_HLEN + ETH_FCS_LEN);
1361         /* HDS, disable */
1362         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1363
1364         atl1c_configure_tx(adapter);
1365         atl1c_configure_rx(adapter);
1366         atl1c_configure_rss(adapter);
1367         atl1c_configure_dma(adapter);
1368
1369         return 0;
1370 }
1371
1372 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1373 {
1374         u16 hw_reg_addr = 0;
1375         unsigned long *stats_item = NULL;
1376         u32 data;
1377
1378         /* update rx status */
1379         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1380         stats_item  = &adapter->hw_stats.rx_ok;
1381         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1382                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1383                 *stats_item += data;
1384                 stats_item++;
1385                 hw_reg_addr += 4;
1386         }
1387 /* update tx status */
1388         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1389         stats_item  = &adapter->hw_stats.tx_ok;
1390         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1391                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1392                 *stats_item += data;
1393                 stats_item++;
1394                 hw_reg_addr += 4;
1395         }
1396 }
1397
1398 /*
1399  * atl1c_get_stats - Get System Network Statistics
1400  * @netdev: network interface device structure
1401  *
1402  * Returns the address of the device statistics structure.
1403  * The statistics are actually updated from the timer callback.
1404  */
1405 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1406 {
1407         struct atl1c_adapter *adapter = netdev_priv(netdev);
1408         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1409         struct net_device_stats *net_stats = &adapter->net_stats;
1410
1411         atl1c_update_hw_stats(adapter);
1412         net_stats->rx_packets = hw_stats->rx_ok;
1413         net_stats->tx_packets = hw_stats->tx_ok;
1414         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1415         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1416         net_stats->multicast  = hw_stats->rx_mcast;
1417         net_stats->collisions = hw_stats->tx_1_col +
1418                                 hw_stats->tx_2_col * 2 +
1419                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1420         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1421                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1422                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1423         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1424         net_stats->rx_length_errors = hw_stats->rx_len_err;
1425         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1426         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1427         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1428
1429         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1430
1431         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1432                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1433         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1434         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1435         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1436
1437         return &adapter->net_stats;
1438 }
1439
1440 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1441 {
1442         u16 phy_data;
1443
1444         spin_lock(&adapter->mdio_lock);
1445         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1446         spin_unlock(&adapter->mdio_lock);
1447 }
1448
1449 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1450                                 enum atl1c_trans_queue type)
1451 {
1452         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1453                                 &adapter->tpd_ring[type];
1454         struct atl1c_buffer *buffer_info;
1455         struct pci_dev *pdev = adapter->pdev;
1456         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1457         u16 hw_next_to_clean;
1458         u16 shift;
1459         u32 data;
1460
1461         if (type == atl1c_trans_high)
1462                 shift = MB_HTPD_CONS_IDX_SHIFT;
1463         else
1464                 shift = MB_NTPD_CONS_IDX_SHIFT;
1465
1466         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1467         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1468
1469         while (next_to_clean != hw_next_to_clean) {
1470                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1471                 atl1c_clean_buffer(pdev, buffer_info, 1);
1472                 if (++next_to_clean == tpd_ring->count)
1473                         next_to_clean = 0;
1474                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1475         }
1476
1477         if (netif_queue_stopped(adapter->netdev) &&
1478                         netif_carrier_ok(adapter->netdev)) {
1479                 netif_wake_queue(adapter->netdev);
1480         }
1481
1482         return true;
1483 }
1484
1485 /*
1486  * atl1c_intr - Interrupt Handler
1487  * @irq: interrupt number
1488  * @data: pointer to a network interface device structure
1489  * @pt_regs: CPU registers structure
1490  */
1491 static irqreturn_t atl1c_intr(int irq, void *data)
1492 {
1493         struct net_device *netdev  = data;
1494         struct atl1c_adapter *adapter = netdev_priv(netdev);
1495         struct pci_dev *pdev = adapter->pdev;
1496         struct atl1c_hw *hw = &adapter->hw;
1497         int max_ints = AT_MAX_INT_WORK;
1498         int handled = IRQ_NONE;
1499         u32 status;
1500         u32 reg_data;
1501
1502         do {
1503                 AT_READ_REG(hw, REG_ISR, &reg_data);
1504                 status = reg_data & hw->intr_mask;
1505
1506                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1507                         if (max_ints != AT_MAX_INT_WORK)
1508                                 handled = IRQ_HANDLED;
1509                         break;
1510                 }
1511                 /* link event */
1512                 if (status & ISR_GPHY)
1513                         atl1c_clear_phy_int(adapter);
1514                 /* Ack ISR */
1515                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1516                 if (status & ISR_RX_PKT) {
1517                         if (likely(napi_schedule_prep(&adapter->napi))) {
1518                                 hw->intr_mask &= ~ISR_RX_PKT;
1519                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1520                                 __napi_schedule(&adapter->napi);
1521                         }
1522                 }
1523                 if (status & ISR_TX_PKT)
1524                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1525
1526                 handled = IRQ_HANDLED;
1527                 /* check if PCIE PHY Link down */
1528                 if (status & ISR_ERROR) {
1529                         if (netif_msg_hw(adapter))
1530                                 dev_err(&pdev->dev,
1531                                         "atl1c hardware error (status = 0x%x)\n",
1532                                         status & ISR_ERROR);
1533                         /* reset MAC */
1534                         hw->intr_mask &= ~ISR_ERROR;
1535                         AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1536                         adapter->work_event |= ATL1C_WORK_EVENT_RESET;
1537                         schedule_work(&adapter->common_task);
1538                         break;
1539                 }
1540
1541                 if (status & ISR_OVER)
1542                         if (netif_msg_intr(adapter))
1543                                 dev_warn(&pdev->dev,
1544                                         "TX/RX overflow (status = 0x%x)\n",
1545                                         status & ISR_OVER);
1546
1547                 /* link event */
1548                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1549                         adapter->net_stats.tx_carrier_errors++;
1550                         atl1c_link_chg_event(adapter);
1551                         break;
1552                 }
1553
1554         } while (--max_ints > 0);
1555         /* re-enable Interrupt*/
1556         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1557         return handled;
1558 }
1559
1560 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1561                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1562 {
1563         /*
1564          * The pid field in RRS in not correct sometimes, so we
1565          * cannot figure out if the packet is fragmented or not,
1566          * so we tell the KERNEL CHECKSUM_NONE
1567          */
1568         skb->ip_summed = CHECKSUM_NONE;
1569 }
1570
1571 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1572 {
1573         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1574         struct pci_dev *pdev = adapter->pdev;
1575         struct atl1c_buffer *buffer_info, *next_info;
1576         struct sk_buff *skb;
1577         void *vir_addr = NULL;
1578         u16 num_alloc = 0;
1579         u16 rfd_next_to_use, next_next;
1580         struct atl1c_rx_free_desc *rfd_desc;
1581
1582         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1583         if (++next_next == rfd_ring->count)
1584                 next_next = 0;
1585         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1586         next_info = &rfd_ring->buffer_info[next_next];
1587
1588         while (next_info->flags & ATL1C_BUFFER_FREE) {
1589                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1590
1591                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1592                 if (unlikely(!skb)) {
1593                         if (netif_msg_rx_err(adapter))
1594                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1595                         break;
1596                 }
1597
1598                 /*
1599                  * Make buffer alignment 2 beyond a 16 byte boundary
1600                  * this will result in a 16 byte aligned IP header after
1601                  * the 14 byte MAC header is removed
1602                  */
1603                 vir_addr = skb->data;
1604                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1605                 buffer_info->skb = skb;
1606                 buffer_info->length = adapter->rx_buffer_len;
1607                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1608                                                 buffer_info->length,
1609                                                 PCI_DMA_FROMDEVICE);
1610                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1611                         ATL1C_PCIMAP_FROMDEVICE);
1612                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1613                 rfd_next_to_use = next_next;
1614                 if (++next_next == rfd_ring->count)
1615                         next_next = 0;
1616                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1617                 next_info = &rfd_ring->buffer_info[next_next];
1618                 num_alloc++;
1619         }
1620
1621         if (num_alloc) {
1622                 /* TODO: update mailbox here */
1623                 wmb();
1624                 rfd_ring->next_to_use = rfd_next_to_use;
1625                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1626                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1627         }
1628
1629         return num_alloc;
1630 }
1631
1632 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1633                         struct  atl1c_recv_ret_status *rrs, u16 num)
1634 {
1635         u16 i;
1636         /* the relationship between rrd and rfd is one map one */
1637         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1638                                         rrd_ring->next_to_clean)) {
1639                 rrs->word3 &= ~RRS_RXD_UPDATED;
1640                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1641                         rrd_ring->next_to_clean = 0;
1642         }
1643 }
1644
1645 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1646         struct atl1c_recv_ret_status *rrs, u16 num)
1647 {
1648         u16 i;
1649         u16 rfd_index;
1650         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1651
1652         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1653                         RRS_RX_RFD_INDEX_MASK;
1654         for (i = 0; i < num; i++) {
1655                 buffer_info[rfd_index].skb = NULL;
1656                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1657                                         ATL1C_BUFFER_FREE);
1658                 if (++rfd_index == rfd_ring->count)
1659                         rfd_index = 0;
1660         }
1661         rfd_ring->next_to_clean = rfd_index;
1662 }
1663
1664 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1665                    int *work_done, int work_to_do)
1666 {
1667         u16 rfd_num, rfd_index;
1668         u16 count = 0;
1669         u16 length;
1670         struct pci_dev *pdev = adapter->pdev;
1671         struct net_device *netdev  = adapter->netdev;
1672         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1673         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1674         struct sk_buff *skb;
1675         struct atl1c_recv_ret_status *rrs;
1676         struct atl1c_buffer *buffer_info;
1677
1678         while (1) {
1679                 if (*work_done >= work_to_do)
1680                         break;
1681                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1682                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1683                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1684                                 RRS_RX_RFD_CNT_MASK;
1685                         if (unlikely(rfd_num != 1))
1686                                 /* TODO support mul rfd*/
1687                                 if (netif_msg_rx_err(adapter))
1688                                         dev_warn(&pdev->dev,
1689                                                 "Multi rfd not support yet!\n");
1690                         goto rrs_checked;
1691                 } else {
1692                         break;
1693                 }
1694 rrs_checked:
1695                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1696                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1697                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1698                                 if (netif_msg_rx_err(adapter))
1699                                         dev_warn(&pdev->dev,
1700                                                 "wrong packet! rrs word3 is %x\n",
1701                                                 rrs->word3);
1702                         continue;
1703                 }
1704
1705                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1706                                 RRS_PKT_SIZE_MASK);
1707                 /* Good Receive */
1708                 if (likely(rfd_num == 1)) {
1709                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1710                                         RRS_RX_RFD_INDEX_MASK;
1711                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1712                         pci_unmap_single(pdev, buffer_info->dma,
1713                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1714                         skb = buffer_info->skb;
1715                 } else {
1716                         /* TODO */
1717                         if (netif_msg_rx_err(adapter))
1718                                 dev_warn(&pdev->dev,
1719                                         "Multi rfd not support yet!\n");
1720                         break;
1721                 }
1722                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1723                 skb_put(skb, length - ETH_FCS_LEN);
1724                 skb->protocol = eth_type_trans(skb, netdev);
1725                 skb->dev = netdev;
1726                 atl1c_rx_checksum(adapter, skb, rrs);
1727                 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1728                         u16 vlan;
1729
1730                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1731                         vlan = le16_to_cpu(vlan);
1732                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1733                 } else
1734                         netif_receive_skb(skb);
1735
1736                 (*work_done)++;
1737                 count++;
1738         }
1739         if (count)
1740                 atl1c_alloc_rx_buffer(adapter, que);
1741 }
1742
1743 /*
1744  * atl1c_clean - NAPI Rx polling callback
1745  * @adapter: board private structure
1746  */
1747 static int atl1c_clean(struct napi_struct *napi, int budget)
1748 {
1749         struct atl1c_adapter *adapter =
1750                         container_of(napi, struct atl1c_adapter, napi);
1751         int work_done = 0;
1752
1753         /* Keep link state information with original netdev */
1754         if (!netif_carrier_ok(adapter->netdev))
1755                 goto quit_polling;
1756         /* just enable one RXQ */
1757         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1758
1759         if (work_done < budget) {
1760 quit_polling:
1761                 napi_complete(napi);
1762                 adapter->hw.intr_mask |= ISR_RX_PKT;
1763                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1764         }
1765         return work_done;
1766 }
1767
1768 #ifdef CONFIG_NET_POLL_CONTROLLER
1769
1770 /*
1771  * Polling 'interrupt' - used by things like netconsole to send skbs
1772  * without having to re-enable interrupts. It's not called while
1773  * the interrupt routine is executing.
1774  */
1775 static void atl1c_netpoll(struct net_device *netdev)
1776 {
1777         struct atl1c_adapter *adapter = netdev_priv(netdev);
1778
1779         disable_irq(adapter->pdev->irq);
1780         atl1c_intr(adapter->pdev->irq, netdev);
1781         enable_irq(adapter->pdev->irq);
1782 }
1783 #endif
1784
1785 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1786 {
1787         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1788         u16 next_to_use = 0;
1789         u16 next_to_clean = 0;
1790
1791         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1792         next_to_use   = tpd_ring->next_to_use;
1793
1794         return (u16)(next_to_clean > next_to_use) ?
1795                 (next_to_clean - next_to_use - 1) :
1796                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1797 }
1798
1799 /*
1800  * get next usable tpd
1801  * Note: should call atl1c_tdp_avail to make sure
1802  * there is enough tpd to use
1803  */
1804 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1805         enum atl1c_trans_queue type)
1806 {
1807         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1808         struct atl1c_tpd_desc *tpd_desc;
1809         u16 next_to_use = 0;
1810
1811         next_to_use = tpd_ring->next_to_use;
1812         if (++tpd_ring->next_to_use == tpd_ring->count)
1813                 tpd_ring->next_to_use = 0;
1814         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1815         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1816         return  tpd_desc;
1817 }
1818
1819 static struct atl1c_buffer *
1820 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1821 {
1822         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1823
1824         return &tpd_ring->buffer_info[tpd -
1825                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1826 }
1827
1828 /* Calculate the transmit packet descript needed*/
1829 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1830 {
1831         u16 tpd_req;
1832         u16 proto_hdr_len = 0;
1833
1834         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1835
1836         if (skb_is_gso(skb)) {
1837                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1838                 if (proto_hdr_len < skb_headlen(skb))
1839                         tpd_req++;
1840                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1841                         tpd_req++;
1842         }
1843         return tpd_req;
1844 }
1845
1846 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1847                           struct sk_buff *skb,
1848                           struct atl1c_tpd_desc **tpd,
1849                           enum atl1c_trans_queue type)
1850 {
1851         struct pci_dev *pdev = adapter->pdev;
1852         u8 hdr_len;
1853         u32 real_len;
1854         unsigned short offload_type;
1855         int err;
1856
1857         if (skb_is_gso(skb)) {
1858                 if (skb_header_cloned(skb)) {
1859                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1860                         if (unlikely(err))
1861                                 return -1;
1862                 }
1863                 offload_type = skb_shinfo(skb)->gso_type;
1864
1865                 if (offload_type & SKB_GSO_TCPV4) {
1866                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1867                                         + ntohs(ip_hdr(skb)->tot_len));
1868
1869                         if (real_len < skb->len)
1870                                 pskb_trim(skb, real_len);
1871
1872                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1873                         if (unlikely(skb->len == hdr_len)) {
1874                                 /* only xsum need */
1875                                 if (netif_msg_tx_queued(adapter))
1876                                         dev_warn(&pdev->dev,
1877                                                 "IPV4 tso with zero data??\n");
1878                                 goto check_sum;
1879                         } else {
1880                                 ip_hdr(skb)->check = 0;
1881                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1882                                                         ip_hdr(skb)->saddr,
1883                                                         ip_hdr(skb)->daddr,
1884                                                         0, IPPROTO_TCP, 0);
1885                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1886                         }
1887                 }
1888
1889                 if (offload_type & SKB_GSO_TCPV6) {
1890                         struct atl1c_tpd_ext_desc *etpd =
1891                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1892
1893                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1894                         *tpd = atl1c_get_tpd(adapter, type);
1895                         ipv6_hdr(skb)->payload_len = 0;
1896                         /* check payload == 0 byte ? */
1897                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1898                         if (unlikely(skb->len == hdr_len)) {
1899                                 /* only xsum need */
1900                                 if (netif_msg_tx_queued(adapter))
1901                                         dev_warn(&pdev->dev,
1902                                                 "IPV6 tso with zero data??\n");
1903                                 goto check_sum;
1904                         } else
1905                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1906                                                 &ipv6_hdr(skb)->saddr,
1907                                                 &ipv6_hdr(skb)->daddr,
1908                                                 0, IPPROTO_TCP, 0);
1909                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1910                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1911                         etpd->pkt_len = cpu_to_le32(skb->len);
1912                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1913                 }
1914
1915                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1916                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1917                                 TPD_TCPHDR_OFFSET_SHIFT;
1918                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1919                                 TPD_MSS_SHIFT;
1920                 return 0;
1921         }
1922
1923 check_sum:
1924         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1925                 u8 css, cso;
1926                 cso = skb_transport_offset(skb);
1927
1928                 if (unlikely(cso & 0x1)) {
1929                         if (netif_msg_tx_err(adapter))
1930                                 dev_err(&adapter->pdev->dev,
1931                                         "payload offset should not an event number\n");
1932                         return -1;
1933                 } else {
1934                         css = cso + skb->csum_offset;
1935
1936                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1937                                         TPD_PLOADOFFSET_SHIFT;
1938                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1939                                         TPD_CCSUM_OFFSET_SHIFT;
1940                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1941                 }
1942         }
1943         return 0;
1944 }
1945
1946 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1947                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1948                         enum atl1c_trans_queue type)
1949 {
1950         struct atl1c_tpd_desc *use_tpd = NULL;
1951         struct atl1c_buffer *buffer_info = NULL;
1952         u16 buf_len = skb_headlen(skb);
1953         u16 map_len = 0;
1954         u16 mapped_len = 0;
1955         u16 hdr_len = 0;
1956         u16 nr_frags;
1957         u16 f;
1958         int tso;
1959
1960         nr_frags = skb_shinfo(skb)->nr_frags;
1961         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
1962         if (tso) {
1963                 /* TSO */
1964                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1965                 use_tpd = tpd;
1966
1967                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1968                 buffer_info->length = map_len;
1969                 buffer_info->dma = pci_map_single(adapter->pdev,
1970                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1971                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1972                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1973                         ATL1C_PCIMAP_TODEVICE);
1974                 mapped_len += map_len;
1975                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1976                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1977         }
1978
1979         if (mapped_len < buf_len) {
1980                 /* mapped_len == 0, means we should use the first tpd,
1981                    which is given by caller  */
1982                 if (mapped_len == 0)
1983                         use_tpd = tpd;
1984                 else {
1985                         use_tpd = atl1c_get_tpd(adapter, type);
1986                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1987                 }
1988                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1989                 buffer_info->length = buf_len - mapped_len;
1990                 buffer_info->dma =
1991                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1992                                         buffer_info->length, PCI_DMA_TODEVICE);
1993                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1994                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1995                         ATL1C_PCIMAP_TODEVICE);
1996                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1997                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
1998         }
1999
2000         for (f = 0; f < nr_frags; f++) {
2001                 struct skb_frag_struct *frag;
2002
2003                 frag = &skb_shinfo(skb)->frags[f];
2004
2005                 use_tpd = atl1c_get_tpd(adapter, type);
2006                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2007
2008                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2009                 buffer_info->length = frag->size;
2010                 buffer_info->dma =
2011                         pci_map_page(adapter->pdev, frag->page,
2012                                         frag->page_offset,
2013                                         buffer_info->length,
2014                                         PCI_DMA_TODEVICE);
2015                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2016                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2017                         ATL1C_PCIMAP_TODEVICE);
2018                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2019                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2020         }
2021
2022         /* The last tpd */
2023         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2024         /* The last buffer info contain the skb address,
2025            so it will be free after unmap */
2026         buffer_info->skb = skb;
2027 }
2028
2029 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2030                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2031 {
2032         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2033         u32 prod_data;
2034
2035         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2036         switch (type) {
2037         case atl1c_trans_high:
2038                 prod_data &= 0xFFFF0000;
2039                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2040                 break;
2041         case atl1c_trans_normal:
2042                 prod_data &= 0x0000FFFF;
2043                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2044                 break;
2045         default:
2046                 break;
2047         }
2048         wmb();
2049         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2050 }
2051
2052 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2053                                           struct net_device *netdev)
2054 {
2055         struct atl1c_adapter *adapter = netdev_priv(netdev);
2056         unsigned long flags;
2057         u16 tpd_req = 1;
2058         struct atl1c_tpd_desc *tpd;
2059         enum atl1c_trans_queue type = atl1c_trans_normal;
2060
2061         if (test_bit(__AT_DOWN, &adapter->flags)) {
2062                 dev_kfree_skb_any(skb);
2063                 return NETDEV_TX_OK;
2064         }
2065
2066         tpd_req = atl1c_cal_tpd_req(skb);
2067         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2068                 if (netif_msg_pktdata(adapter))
2069                         dev_info(&adapter->pdev->dev, "tx locked\n");
2070                 return NETDEV_TX_LOCKED;
2071         }
2072         if (skb->mark == 0x01)
2073                 type = atl1c_trans_high;
2074         else
2075                 type = atl1c_trans_normal;
2076
2077         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2078                 /* no enough descriptor, just stop queue */
2079                 netif_stop_queue(netdev);
2080                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2081                 return NETDEV_TX_BUSY;
2082         }
2083
2084         tpd = atl1c_get_tpd(adapter, type);
2085
2086         /* do TSO and check sum */
2087         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2088                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2089                 dev_kfree_skb_any(skb);
2090                 return NETDEV_TX_OK;
2091         }
2092
2093         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2094                 u16 vlan = vlan_tx_tag_get(skb);
2095                 __le16 tag;
2096
2097                 vlan = cpu_to_le16(vlan);
2098                 AT_VLAN_TO_TAG(vlan, tag);
2099                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2100                 tpd->vlan_tag = tag;
2101         }
2102
2103         if (skb_network_offset(skb) != ETH_HLEN)
2104                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2105
2106         atl1c_tx_map(adapter, skb, tpd, type);
2107         atl1c_tx_queue(adapter, skb, tpd, type);
2108
2109         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2110         return NETDEV_TX_OK;
2111 }
2112
2113 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2114 {
2115         struct net_device *netdev = adapter->netdev;
2116
2117         free_irq(adapter->pdev->irq, netdev);
2118
2119         if (adapter->have_msi)
2120                 pci_disable_msi(adapter->pdev);
2121 }
2122
2123 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2124 {
2125         struct pci_dev    *pdev   = adapter->pdev;
2126         struct net_device *netdev = adapter->netdev;
2127         int flags = 0;
2128         int err = 0;
2129
2130         adapter->have_msi = true;
2131         err = pci_enable_msi(adapter->pdev);
2132         if (err) {
2133                 if (netif_msg_ifup(adapter))
2134                         dev_err(&pdev->dev,
2135                                 "Unable to allocate MSI interrupt Error: %d\n",
2136                                 err);
2137                 adapter->have_msi = false;
2138         } else
2139                 netdev->irq = pdev->irq;
2140
2141         if (!adapter->have_msi)
2142                 flags |= IRQF_SHARED;
2143         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2144                         netdev->name, netdev);
2145         if (err) {
2146                 if (netif_msg_ifup(adapter))
2147                         dev_err(&pdev->dev,
2148                                 "Unable to allocate interrupt Error: %d\n",
2149                                 err);
2150                 if (adapter->have_msi)
2151                         pci_disable_msi(adapter->pdev);
2152                 return err;
2153         }
2154         if (netif_msg_ifup(adapter))
2155                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2156         return err;
2157 }
2158
2159 int atl1c_up(struct atl1c_adapter *adapter)
2160 {
2161         struct net_device *netdev = adapter->netdev;
2162         int num;
2163         int err;
2164         int i;
2165
2166         netif_carrier_off(netdev);
2167         atl1c_init_ring_ptrs(adapter);
2168         atl1c_set_multi(netdev);
2169         atl1c_restore_vlan(adapter);
2170
2171         for (i = 0; i < adapter->num_rx_queues; i++) {
2172                 num = atl1c_alloc_rx_buffer(adapter, i);
2173                 if (unlikely(num == 0)) {
2174                         err = -ENOMEM;
2175                         goto err_alloc_rx;
2176                 }
2177         }
2178
2179         if (atl1c_configure(adapter)) {
2180                 err = -EIO;
2181                 goto err_up;
2182         }
2183
2184         err = atl1c_request_irq(adapter);
2185         if (unlikely(err))
2186                 goto err_up;
2187
2188         clear_bit(__AT_DOWN, &adapter->flags);
2189         napi_enable(&adapter->napi);
2190         atl1c_irq_enable(adapter);
2191         atl1c_check_link_status(adapter);
2192         netif_start_queue(netdev);
2193         return err;
2194
2195 err_up:
2196 err_alloc_rx:
2197         atl1c_clean_rx_ring(adapter);
2198         return err;
2199 }
2200
2201 void atl1c_down(struct atl1c_adapter *adapter)
2202 {
2203         struct net_device *netdev = adapter->netdev;
2204
2205         atl1c_del_timer(adapter);
2206         adapter->work_event = 0; /* clear all event */
2207         /* signal that we're down so the interrupt handler does not
2208          * reschedule our watchdog timer */
2209         set_bit(__AT_DOWN, &adapter->flags);
2210         netif_carrier_off(netdev);
2211         napi_disable(&adapter->napi);
2212         atl1c_irq_disable(adapter);
2213         atl1c_free_irq(adapter);
2214         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
2215         /* reset MAC to disable all RX/TX */
2216         atl1c_reset_mac(&adapter->hw);
2217         msleep(1);
2218
2219         adapter->link_speed = SPEED_0;
2220         adapter->link_duplex = -1;
2221         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2222         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2223         atl1c_clean_rx_ring(adapter);
2224 }
2225
2226 /*
2227  * atl1c_open - Called when a network interface is made active
2228  * @netdev: network interface device structure
2229  *
2230  * Returns 0 on success, negative value on failure
2231  *
2232  * The open entry point is called when a network interface is made
2233  * active by the system (IFF_UP).  At this point all resources needed
2234  * for transmit and receive operations are allocated, the interrupt
2235  * handler is registered with the OS, the watchdog timer is started,
2236  * and the stack is notified that the interface is ready.
2237  */
2238 static int atl1c_open(struct net_device *netdev)
2239 {
2240         struct atl1c_adapter *adapter = netdev_priv(netdev);
2241         int err;
2242
2243         /* disallow open during test */
2244         if (test_bit(__AT_TESTING, &adapter->flags))
2245                 return -EBUSY;
2246
2247         /* allocate rx/tx dma buffer & descriptors */
2248         err = atl1c_setup_ring_resources(adapter);
2249         if (unlikely(err))
2250                 return err;
2251
2252         err = atl1c_up(adapter);
2253         if (unlikely(err))
2254                 goto err_up;
2255
2256         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2257                 u32 phy_data;
2258
2259                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2260                 phy_data |= MDIO_AP_EN;
2261                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2262         }
2263         return 0;
2264
2265 err_up:
2266         atl1c_free_irq(adapter);
2267         atl1c_free_ring_resources(adapter);
2268         atl1c_reset_mac(&adapter->hw);
2269         return err;
2270 }
2271
2272 /*
2273  * atl1c_close - Disables a network interface
2274  * @netdev: network interface device structure
2275  *
2276  * Returns 0, this is not allowed to fail
2277  *
2278  * The close entry point is called when an interface is de-activated
2279  * by the OS.  The hardware is still under the drivers control, but
2280  * needs to be disabled.  A global MAC reset is issued to stop the
2281  * hardware, and all transmit and receive resources are freed.
2282  */
2283 static int atl1c_close(struct net_device *netdev)
2284 {
2285         struct atl1c_adapter *adapter = netdev_priv(netdev);
2286
2287         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2288         atl1c_down(adapter);
2289         atl1c_free_ring_resources(adapter);
2290         return 0;
2291 }
2292
2293 static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2294 {
2295         struct net_device *netdev = pci_get_drvdata(pdev);
2296         struct atl1c_adapter *adapter = netdev_priv(netdev);
2297         struct atl1c_hw *hw = &adapter->hw;
2298         u32 ctrl;
2299         u32 mac_ctrl_data;
2300         u32 master_ctrl_data;
2301         u32 wol_ctrl_data = 0;
2302         u16 mii_bmsr_data;
2303         u16 save_autoneg_advertised;
2304         u16 mii_intr_status_data;
2305         u32 wufc = adapter->wol;
2306         u32 i;
2307         int retval = 0;
2308
2309         if (netif_running(netdev)) {
2310                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2311                 atl1c_down(adapter);
2312         }
2313         netif_device_detach(netdev);
2314         atl1c_disable_l0s_l1(hw);
2315         retval = pci_save_state(pdev);
2316         if (retval)
2317                 return retval;
2318         if (wufc) {
2319                 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2320                 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2321
2322                 /* get link status */
2323                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2324                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2325                 save_autoneg_advertised = hw->autoneg_advertised;
2326                 hw->autoneg_advertised = ADVERTISED_10baseT_Half;
2327                 if (atl1c_restart_autoneg(hw) != 0)
2328                         if (netif_msg_link(adapter))
2329                                 dev_warn(&pdev->dev, "phy autoneg failed\n");
2330                 hw->phy_configured = false; /* re-init PHY when resume */
2331                 hw->autoneg_advertised = save_autoneg_advertised;
2332                 /* turn on magic packet wol */
2333                 if (wufc & AT_WUFC_MAG)
2334                         wol_ctrl_data = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2335
2336                 if (wufc & AT_WUFC_LNKC) {
2337                         for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2338                                 msleep(100);
2339                                 atl1c_read_phy_reg(hw, MII_BMSR,
2340                                         (u16 *)&mii_bmsr_data);
2341                                 if (mii_bmsr_data & BMSR_LSTATUS)
2342                                         break;
2343                         }
2344                         if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2345                                 if (netif_msg_link(adapter))
2346                                         dev_warn(&pdev->dev,
2347                                                 "%s: Link may change"
2348                                                 "when suspend\n",
2349                                                 atl1c_driver_name);
2350                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2351                         /* only link up can wake up */
2352                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2353                                 if (netif_msg_link(adapter))
2354                                         dev_err(&pdev->dev,
2355                                                 "%s: read write phy "
2356                                                 "register failed.\n",
2357                                                 atl1c_driver_name);
2358                                 goto wol_dis;
2359                         }
2360                 }
2361                 /* clear phy interrupt */
2362                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2363                 /* Config MAC Ctrl register */
2364                 mac_ctrl_data = MAC_CTRL_RX_EN;
2365                 /* set to 10/100M halt duplex */
2366                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2367                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2368                                  MAC_CTRL_PRMLEN_MASK) <<
2369                                  MAC_CTRL_PRMLEN_SHIFT);
2370
2371                 if (adapter->vlgrp)
2372                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2373
2374                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2375                 if (wufc & AT_WUFC_MAG)
2376                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2377
2378                 if (netif_msg_hw(adapter))
2379                         dev_dbg(&pdev->dev,
2380                                 "%s: suspend MAC=0x%x\n",
2381                                 atl1c_driver_name, mac_ctrl_data);
2382                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2383                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2384                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2385
2386                 /* pcie patch */
2387                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2388                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2389                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2390
2391                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2392                 goto suspend_exit;
2393         }
2394 wol_dis:
2395
2396         /* WOL disabled */
2397         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2398
2399         /* pcie patch */
2400         AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2401         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2402         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2403
2404         atl1c_phy_disable(hw);
2405         hw->phy_configured = false; /* re-init PHY when resume */
2406
2407         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2408 suspend_exit:
2409
2410         pci_disable_device(pdev);
2411         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2412
2413         return 0;
2414 }
2415
2416 static int atl1c_resume(struct pci_dev *pdev)
2417 {
2418         struct net_device *netdev = pci_get_drvdata(pdev);
2419         struct atl1c_adapter *adapter = netdev_priv(netdev);
2420
2421         pci_set_power_state(pdev, PCI_D0);
2422         pci_restore_state(pdev);
2423         pci_enable_wake(pdev, PCI_D3hot, 0);
2424         pci_enable_wake(pdev, PCI_D3cold, 0);
2425
2426         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2427
2428         atl1c_phy_reset(&adapter->hw);
2429         atl1c_reset_mac(&adapter->hw);
2430         netif_device_attach(netdev);
2431         if (netif_running(netdev))
2432                 atl1c_up(adapter);
2433
2434         return 0;
2435 }
2436
2437 static void atl1c_shutdown(struct pci_dev *pdev)
2438 {
2439         atl1c_suspend(pdev, PMSG_SUSPEND);
2440 }
2441
2442 static const struct net_device_ops atl1c_netdev_ops = {
2443         .ndo_open               = atl1c_open,
2444         .ndo_stop               = atl1c_close,
2445         .ndo_validate_addr      = eth_validate_addr,
2446         .ndo_start_xmit         = atl1c_xmit_frame,
2447         .ndo_set_mac_address    = atl1c_set_mac_addr,
2448         .ndo_set_multicast_list = atl1c_set_multi,
2449         .ndo_change_mtu         = atl1c_change_mtu,
2450         .ndo_do_ioctl           = atl1c_ioctl,
2451         .ndo_tx_timeout         = atl1c_tx_timeout,
2452         .ndo_get_stats          = atl1c_get_stats,
2453         .ndo_vlan_rx_register   = atl1c_vlan_rx_register,
2454 #ifdef CONFIG_NET_POLL_CONTROLLER
2455         .ndo_poll_controller    = atl1c_netpoll,
2456 #endif
2457 };
2458
2459 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2460 {
2461         SET_NETDEV_DEV(netdev, &pdev->dev);
2462         pci_set_drvdata(pdev, netdev);
2463
2464         netdev->irq  = pdev->irq;
2465         netdev->netdev_ops = &atl1c_netdev_ops;
2466         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2467         atl1c_set_ethtool_ops(netdev);
2468
2469         /* TODO: add when ready */
2470         netdev->features =      NETIF_F_SG         |
2471                                 NETIF_F_HW_CSUM    |
2472                                 NETIF_F_HW_VLAN_TX |
2473                                 NETIF_F_HW_VLAN_RX |
2474                                 NETIF_F_TSO        |
2475                                 NETIF_F_TSO6;
2476         return 0;
2477 }
2478
2479 /*
2480  * atl1c_probe - Device Initialization Routine
2481  * @pdev: PCI device information struct
2482  * @ent: entry in atl1c_pci_tbl
2483  *
2484  * Returns 0 on success, negative on failure
2485  *
2486  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2487  * The OS initialization, configuring of the adapter private structure,
2488  * and a hardware reset occur.
2489  */
2490 static int __devinit atl1c_probe(struct pci_dev *pdev,
2491                                  const struct pci_device_id *ent)
2492 {
2493         struct net_device *netdev;
2494         struct atl1c_adapter *adapter;
2495         static int cards_found;
2496
2497         int err = 0;
2498
2499         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2500         err = pci_enable_device_mem(pdev);
2501         if (err) {
2502                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2503                 return err;
2504         }
2505
2506         /*
2507          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2508          * shared register for the high 32 bits, so only a single, aligned,
2509          * 4 GB physical address range can be used at a time.
2510          *
2511          * Supporting 64-bit DMA on this hardware is more trouble than it's
2512          * worth.  It is far easier to limit to 32-bit DMA than update
2513          * various kernel subsystems to support the mechanics required by a
2514          * fixed-high-32-bit system.
2515          */
2516         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2517             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2518                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2519                 goto err_dma;
2520         }
2521
2522         err = pci_request_regions(pdev, atl1c_driver_name);
2523         if (err) {
2524                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2525                 goto err_pci_reg;
2526         }
2527
2528         pci_set_master(pdev);
2529
2530         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2531         if (netdev == NULL) {
2532                 err = -ENOMEM;
2533                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2534                 goto err_alloc_etherdev;
2535         }
2536
2537         err = atl1c_init_netdev(netdev, pdev);
2538         if (err) {
2539                 dev_err(&pdev->dev, "init netdevice failed\n");
2540                 goto err_init_netdev;
2541         }
2542         adapter = netdev_priv(netdev);
2543         adapter->bd_number = cards_found;
2544         adapter->netdev = netdev;
2545         adapter->pdev = pdev;
2546         adapter->hw.adapter = adapter;
2547         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2548         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2549         if (!adapter->hw.hw_addr) {
2550                 err = -EIO;
2551                 dev_err(&pdev->dev, "cannot map device registers\n");
2552                 goto err_ioremap;
2553         }
2554         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2555
2556         /* init mii data */
2557         adapter->mii.dev = netdev;
2558         adapter->mii.mdio_read  = atl1c_mdio_read;
2559         adapter->mii.mdio_write = atl1c_mdio_write;
2560         adapter->mii.phy_id_mask = 0x1f;
2561         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2562         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2563         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2564                         (unsigned long)adapter);
2565         /* setup the private structure */
2566         err = atl1c_sw_init(adapter);
2567         if (err) {
2568                 dev_err(&pdev->dev, "net device private data init failed\n");
2569                 goto err_sw_init;
2570         }
2571         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2572                         ATL1C_PCIE_PHY_RESET);
2573
2574         /* Init GPHY as early as possible due to power saving issue  */
2575         atl1c_phy_reset(&adapter->hw);
2576
2577         err = atl1c_reset_mac(&adapter->hw);
2578         if (err) {
2579                 err = -EIO;
2580                 goto err_reset;
2581         }
2582
2583         device_init_wakeup(&pdev->dev, 1);
2584         /* reset the controller to
2585          * put the device in a known good starting state */
2586         err = atl1c_phy_init(&adapter->hw);
2587         if (err) {
2588                 err = -EIO;
2589                 goto err_reset;
2590         }
2591         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2592                 err = -EIO;
2593                 dev_err(&pdev->dev, "get mac address failed\n");
2594                 goto err_eeprom;
2595         }
2596         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2597         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2598         if (netif_msg_probe(adapter))
2599                 dev_dbg(&pdev->dev,
2600                         "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2601                         adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2602                         adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2603                         adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2604
2605         atl1c_hw_set_mac_addr(&adapter->hw);
2606         INIT_WORK(&adapter->common_task, atl1c_common_task);
2607         adapter->work_event = 0;
2608         err = register_netdev(netdev);
2609         if (err) {
2610                 dev_err(&pdev->dev, "register netdevice failed\n");
2611                 goto err_register;
2612         }
2613
2614         if (netif_msg_probe(adapter))
2615                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2616         cards_found++;
2617         return 0;
2618
2619 err_reset:
2620 err_register:
2621 err_sw_init:
2622 err_eeprom:
2623         iounmap(adapter->hw.hw_addr);
2624 err_init_netdev:
2625 err_ioremap:
2626         free_netdev(netdev);
2627 err_alloc_etherdev:
2628         pci_release_regions(pdev);
2629 err_pci_reg:
2630 err_dma:
2631         pci_disable_device(pdev);
2632         return err;
2633 }
2634
2635 /*
2636  * atl1c_remove - Device Removal Routine
2637  * @pdev: PCI device information struct
2638  *
2639  * atl1c_remove is called by the PCI subsystem to alert the driver
2640  * that it should release a PCI device.  The could be caused by a
2641  * Hot-Plug event, or because the driver is going to be removed from
2642  * memory.
2643  */
2644 static void __devexit atl1c_remove(struct pci_dev *pdev)
2645 {
2646         struct net_device *netdev = pci_get_drvdata(pdev);
2647         struct atl1c_adapter *adapter = netdev_priv(netdev);
2648
2649         unregister_netdev(netdev);
2650         atl1c_phy_disable(&adapter->hw);
2651
2652         iounmap(adapter->hw.hw_addr);
2653
2654         pci_release_regions(pdev);
2655         pci_disable_device(pdev);
2656         free_netdev(netdev);
2657 }
2658
2659 /*
2660  * atl1c_io_error_detected - called when PCI error is detected
2661  * @pdev: Pointer to PCI device
2662  * @state: The current pci connection state
2663  *
2664  * This function is called after a PCI bus error affecting
2665  * this device has been detected.
2666  */
2667 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2668                                                 pci_channel_state_t state)
2669 {
2670         struct net_device *netdev = pci_get_drvdata(pdev);
2671         struct atl1c_adapter *adapter = netdev_priv(netdev);
2672
2673         netif_device_detach(netdev);
2674
2675         if (state == pci_channel_io_perm_failure)
2676                 return PCI_ERS_RESULT_DISCONNECT;
2677
2678         if (netif_running(netdev))
2679                 atl1c_down(adapter);
2680
2681         pci_disable_device(pdev);
2682
2683         /* Request a slot slot reset. */
2684         return PCI_ERS_RESULT_NEED_RESET;
2685 }
2686
2687 /*
2688  * atl1c_io_slot_reset - called after the pci bus has been reset.
2689  * @pdev: Pointer to PCI device
2690  *
2691  * Restart the card from scratch, as if from a cold-boot. Implementation
2692  * resembles the first-half of the e1000_resume routine.
2693  */
2694 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2695 {
2696         struct net_device *netdev = pci_get_drvdata(pdev);
2697         struct atl1c_adapter *adapter = netdev_priv(netdev);
2698
2699         if (pci_enable_device(pdev)) {
2700                 if (netif_msg_hw(adapter))
2701                         dev_err(&pdev->dev,
2702                                 "Cannot re-enable PCI device after reset\n");
2703                 return PCI_ERS_RESULT_DISCONNECT;
2704         }
2705         pci_set_master(pdev);
2706
2707         pci_enable_wake(pdev, PCI_D3hot, 0);
2708         pci_enable_wake(pdev, PCI_D3cold, 0);
2709
2710         atl1c_reset_mac(&adapter->hw);
2711
2712         return PCI_ERS_RESULT_RECOVERED;
2713 }
2714
2715 /*
2716  * atl1c_io_resume - called when traffic can start flowing again.
2717  * @pdev: Pointer to PCI device
2718  *
2719  * This callback is called when the error recovery driver tells us that
2720  * its OK to resume normal operation. Implementation resembles the
2721  * second-half of the atl1c_resume routine.
2722  */
2723 static void atl1c_io_resume(struct pci_dev *pdev)
2724 {
2725         struct net_device *netdev = pci_get_drvdata(pdev);
2726         struct atl1c_adapter *adapter = netdev_priv(netdev);
2727
2728         if (netif_running(netdev)) {
2729                 if (atl1c_up(adapter)) {
2730                         if (netif_msg_hw(adapter))
2731                                 dev_err(&pdev->dev,
2732                                         "Cannot bring device back up after reset\n");
2733                         return;
2734                 }
2735         }
2736
2737         netif_device_attach(netdev);
2738 }
2739
2740 static struct pci_error_handlers atl1c_err_handler = {
2741         .error_detected = atl1c_io_error_detected,
2742         .slot_reset = atl1c_io_slot_reset,
2743         .resume = atl1c_io_resume,
2744 };
2745
2746 static struct pci_driver atl1c_driver = {
2747         .name     = atl1c_driver_name,
2748         .id_table = atl1c_pci_tbl,
2749         .probe    = atl1c_probe,
2750         .remove   = __devexit_p(atl1c_remove),
2751         /* Power Managment Hooks */
2752         .suspend  = atl1c_suspend,
2753         .resume   = atl1c_resume,
2754         .shutdown = atl1c_shutdown,
2755         .err_handler = &atl1c_err_handler
2756 };
2757
2758 /*
2759  * atl1c_init_module - Driver Registration Routine
2760  *
2761  * atl1c_init_module is the first routine called when the driver is
2762  * loaded. All it does is register with the PCI subsystem.
2763  */
2764 static int __init atl1c_init_module(void)
2765 {
2766         return pci_register_driver(&atl1c_driver);
2767 }
2768
2769 /*
2770  * atl1c_exit_module - Driver Exit Cleanup Routine
2771  *
2772  * atl1c_exit_module is called just before the driver is removed
2773  * from memory.
2774  */
2775 static void __exit atl1c_exit_module(void)
2776 {
2777         pci_unregister_driver(&atl1c_driver);
2778 }
2779
2780 module_init(atl1c_init_module);
2781 module_exit(atl1c_exit_module);