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 /*
 708  * atl1c_clean_tx_ring - Free Tx-skb
 709  * @adapter: board private structure
 710  */
 711 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 712                                 enum atl1c_trans_queue type)
 713 {
 714         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 715         struct atl1c_buffer *buffer_info;
 716         struct pci_dev *pdev = adapter->pdev;
 717         u16 index, ring_count;
 718
 719         ring_count = tpd_ring->count;
 720         for (index = 0; index < ring_count; index++) {
 721                 buffer_info = &tpd_ring->buffer_info[index];
 722                 if (buffer_info->state == ATL1_BUFFER_FREE)
 723                         continue;
 724                 if (buffer_info->dma)
 725                         pci_unmap_single(pdev, buffer_info->dma,
 726                                         buffer_info->length,
 727                                         PCI_DMA_TODEVICE);
 728                 if (buffer_info->skb)
 729                         dev_kfree_skb(buffer_info->skb);
 730                 buffer_info->dma = 0;
 731                 buffer_info->skb = NULL;
 732                 buffer_info->state = ATL1_BUFFER_FREE;
 733         }
 734
 735         /* Zero out Tx-buffers */
 736         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 737                                 ring_count);
 738         atomic_set(&tpd_ring->next_to_clean, 0);
 739         tpd_ring->next_to_use = 0;
 740 }
 741
 742 /*
 743  * atl1c_clean_rx_ring - Free rx-reservation skbs
 744  * @adapter: board private structure
 745  */
 746 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 747 {
 748         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 749         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 750         struct atl1c_buffer *buffer_info;
 751         struct pci_dev *pdev = adapter->pdev;
 752         int i, j;
 753
 754         for (i = 0; i < adapter->num_rx_queues; i++) {
 755                 for (j = 0; j < rfd_ring[i].count; j++) {
 756                         buffer_info = &rfd_ring[i].buffer_info[j];
 757                         if (buffer_info->state == ATL1_BUFFER_FREE)
 758                                 continue;
 759                         if (buffer_info->dma)
 760                                 pci_unmap_single(pdev, buffer_info->dma,
 761                                                 buffer_info->length,
 762                                                 PCI_DMA_FROMDEVICE);
 763                         if (buffer_info->skb)
 764                                 dev_kfree_skb(buffer_info->skb);
 765                         buffer_info->state = ATL1_BUFFER_FREE;
 766                         buffer_info->skb = NULL;
 767                 }
 768                 /* zero out the descriptor ring */
 769                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
 770                 rfd_ring[i].next_to_clean = 0;
 771                 rfd_ring[i].next_to_use = 0;
 772                 rrd_ring[i].next_to_use = 0;
 773                 rrd_ring[i].next_to_clean = 0;
 774         }
 775 }
 776
 777 /*
 778  * Read / Write Ptr Initialize:
 779  */
 780 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 781 {
 782         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 783         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 784         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 785         struct atl1c_buffer *buffer_info;
 786         int i, j;
 787
 788         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 789                 tpd_ring[i].next_to_use = 0;
 790                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 791                 buffer_info = tpd_ring[i].buffer_info;
 792                 for (j = 0; j < tpd_ring->count; j++)
 793                         buffer_info[i].state = ATL1_BUFFER_FREE;
 794         }
 795         for (i = 0; i < adapter->num_rx_queues; i++) {
 796                 rfd_ring[i].next_to_use = 0;
 797                 rfd_ring[i].next_to_clean = 0;
 798                 rrd_ring[i].next_to_use = 0;
 799                 rrd_ring[i].next_to_clean = 0;
 800                 for (j = 0; j < rfd_ring[i].count; j++) {
 801                         buffer_info = &rfd_ring[i].buffer_info[j];
 802                         buffer_info->state = ATL1_BUFFER_FREE;
 803                 }
 804         }
 805 }
 806
 807 /*
 808  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 809  * @adapter: board private structure
 810  *
 811  * Free all transmit software resources
 812  */
 813 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 814 {
 815         struct pci_dev *pdev = adapter->pdev;
 816
 817         pci_free_consistent(pdev, adapter->ring_header.size,
 818                                         adapter->ring_header.desc,
 819                                         adapter->ring_header.dma);
 820         adapter->ring_header.desc = NULL;
 821
 822         /* Note: just free tdp_ring.buffer_info,
 823         *  it contain rfd_ring.buffer_info, do not double free */
 824         if (adapter->tpd_ring[0].buffer_info) {
 825                 kfree(adapter->tpd_ring[0].buffer_info);
 826                 adapter->tpd_ring[0].buffer_info = NULL;
 827         }
 828 }
 829
 830 /*
 831  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 832  * @adapter: board private structure
 833  *
 834  * Return 0 on success, negative on failure
 835  */
 836 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 837 {
 838         struct pci_dev *pdev = adapter->pdev;
 839         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 840         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 841         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 842         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 843         int num_rx_queues = adapter->num_rx_queues;
 844         int size;
 845         int i;
 846         int count = 0;
 847         int rx_desc_count = 0;
 848         u32 offset = 0;
 849
 850         rrd_ring[0].count = rfd_ring[0].count;
 851         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 852                 tpd_ring[i].count = tpd_ring[0].count;
 853
 854         for (i = 1; i < adapter->num_rx_queues; i++)
 855                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
 856
 857         /* 2 tpd queue, one high priority queue,
 858          * another normal priority queue */
 859         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 860                 rfd_ring->count * num_rx_queues);
 861         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 862         if (unlikely(!tpd_ring->buffer_info)) {
 863                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 864                         size);
 865                 goto err_nomem;
 866         }
 867         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 868                 tpd_ring[i].buffer_info =
 869                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 870                 count += tpd_ring[i].count;
 871         }
 872
 873         for (i = 0; i < num_rx_queues; i++) {
 874                 rfd_ring[i].buffer_info =
 875                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 876                 count += rfd_ring[i].count;
 877                 rx_desc_count += rfd_ring[i].count;
 878         }
 879         /*
 880          * real ring DMA buffer
 881          * each ring/block may need up to 8 bytes for alignment, hence the
 882          * additional bytes tacked onto the end.
 883          */
 884         ring_header->size = size =
 885                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 886                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 887                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 888                 sizeof(struct atl1c_hw_stats) +
 889                 8 * 4 + 8 * 2 * num_rx_queues;
 890
 891         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 892                                 &ring_header->dma);
 893         if (unlikely(!ring_header->desc)) {
 894                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 895                 goto err_nomem;
 896         }
 897         memset(ring_header->desc, 0, ring_header->size);
 898         /* init TPD ring */
 899
 900         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 901         offset = tpd_ring[0].dma - ring_header->dma;
 902         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 903                 tpd_ring[i].dma = ring_header->dma + offset;
 904                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 905                 tpd_ring[i].size =
 906                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 907                 offset += roundup(tpd_ring[i].size, 8);
 908         }
 909         /* init RFD ring */
 910         for (i = 0; i < num_rx_queues; i++) {
 911                 rfd_ring[i].dma = ring_header->dma + offset;
 912                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
 913                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
 914                                 rfd_ring[i].count;
 915                 offset += roundup(rfd_ring[i].size, 8);
 916         }
 917
 918         /* init RRD ring */
 919         for (i = 0; i < num_rx_queues; i++) {
 920                 rrd_ring[i].dma = ring_header->dma + offset;
 921                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
 922                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
 923                                 rrd_ring[i].count;
 924                 offset += roundup(rrd_ring[i].size, 8);
 925         }
 926
 927         adapter->smb.dma = ring_header->dma + offset;
 928         adapter->smb.smb = (u8 *)ring_header->desc + offset;
 929         return 0;
 930
 931 err_nomem:
 932         kfree(tpd_ring->buffer_info);
 933         return -ENOMEM;
 934 }
 935
 936 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
 937 {
 938         struct atl1c_hw *hw = &adapter->hw;
 939         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
 940                                 adapter->rfd_ring;
 941         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
 942                                 adapter->rrd_ring;
 943         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
 944                                 adapter->tpd_ring;
 945         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
 946         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
 947         int i;
 948
 949         /* TPD */
 950         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
 951                         (u32)((tpd_ring[atl1c_trans_normal].dma &
 952                                 AT_DMA_HI_ADDR_MASK) >> 32));
 953         /* just enable normal priority TX queue */
 954         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
 955                         (u32)(tpd_ring[atl1c_trans_normal].dma &
 956                                 AT_DMA_LO_ADDR_MASK));
 957         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
 958                         (u32)(tpd_ring[atl1c_trans_high].dma &
 959                                 AT_DMA_LO_ADDR_MASK));
 960         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
 961                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
 962
 963
 964         /* RFD */
 965         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
 966                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
 967         for (i = 0; i < adapter->num_rx_queues; i++)
 968                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
 969                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 970
 971         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
 972                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
 973         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
 974                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
 975
 976         /* RRD */
 977         for (i = 0; i < adapter->num_rx_queues; i++)
 978                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
 979                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
 980         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
 981                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
 982
 983         /* CMB */
 984         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
 985
 986         /* SMB */
 987         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
 988                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
 989         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
 990                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
 991         /* Load all of base address above */
 992         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 993 }
 994
 995 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
 996 {
 997         struct atl1c_hw *hw = &adapter->hw;
 998         u32 dev_ctrl_data;
 999         u32 max_pay_load;
1000         u16 tx_offload_thresh;
1001         u32 txq_ctrl_data;
1002         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
1003
1004         extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1005         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1006         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1007                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1008         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1009         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1010                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1011         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
1012         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1013                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1014         hw->dmar_block = min(max_pay_load, hw->dmar_block);
1015
1016         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1017                         TXQ_NUM_TPD_BURST_SHIFT;
1018         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1019                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1020         txq_ctrl_data |= (atl1c_pay_load_size[hw->dmar_block] &
1021                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1022
1023         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1024 }
1025
1026 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1027 {
1028         struct atl1c_hw *hw = &adapter->hw;
1029         u32 rxq_ctrl_data;
1030
1031         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1032                         RXQ_RFD_BURST_NUM_SHIFT;
1033
1034         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1035                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1036         if (hw->rss_type == atl1c_rss_ipv4)
1037                 rxq_ctrl_data |= RSS_HASH_IPV4;
1038         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1039                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1040         if (hw->rss_type == atl1c_rss_ipv6)
1041                 rxq_ctrl_data |= RSS_HASH_IPV6;
1042         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1043                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1044         if (hw->rss_type != atl1c_rss_disable)
1045                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1046
1047         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1048                         RSS_MODE_SHIFT;
1049         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1050                         RSS_HASH_BITS_SHIFT;
1051         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1052                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_100M &
1053                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1054
1055         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1056 }
1057
1058 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1059 {
1060         struct atl1c_hw *hw = &adapter->hw;
1061
1062         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1063         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1064 }
1065
1066 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1067 {
1068         struct atl1c_hw *hw = &adapter->hw;
1069         u32 dma_ctrl_data;
1070
1071         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1072         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1073                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1074         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1075                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1076         else
1077                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1078
1079         switch (hw->dma_order) {
1080         case atl1c_dma_ord_in:
1081                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1082                 break;
1083         case atl1c_dma_ord_enh:
1084                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1085                 break;
1086         case atl1c_dma_ord_out:
1087                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1088                 break;
1089         default:
1090                 break;
1091         }
1092
1093         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1094                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1095         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1096                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1097         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1098                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1099         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1100                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1101
1102         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1103 }
1104
1105 /*
1106  * Stop the mac, transmit and receive units
1107  * hw - Struct containing variables accessed by shared code
1108  * return : 0  or  idle status (if error)
1109  */
1110 static int atl1c_stop_mac(struct atl1c_hw *hw)
1111 {
1112         u32 data;
1113
1114         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1115         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1116                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1117         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1118
1119         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1120         data &= ~TXQ_CTRL_EN;
1121         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1122
1123         atl1c_wait_until_idle(hw);
1124
1125         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1126         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1127         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1128
1129         return (int)atl1c_wait_until_idle(hw);
1130 }
1131
1132 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1133 {
1134         u32 data;
1135
1136         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1137         switch (hw->adapter->num_rx_queues) {
1138         case 4:
1139                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1140                 break;
1141         case 3:
1142                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1143                 break;
1144         case 2:
1145                 data |= RXQ1_CTRL_EN;
1146                 break;
1147         default:
1148                 break;
1149         }
1150         data |= RXQ_CTRL_EN;
1151         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1152 }
1153
1154 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1155 {
1156         u32 data;
1157
1158         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1159         data |= TXQ_CTRL_EN;
1160         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1161 }
1162
1163 /*
1164  * Reset the transmit and receive units; mask and clear all interrupts.
1165  * hw - Struct containing variables accessed by shared code
1166  * return : 0  or  idle status (if error)
1167  */
1168 static int atl1c_reset_mac(struct atl1c_hw *hw)
1169 {
1170         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1171         struct pci_dev *pdev = adapter->pdev;
1172         int ret;
1173
1174         AT_WRITE_REG(hw, REG_IMR, 0);
1175         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1176
1177         ret = atl1c_stop_mac(hw);
1178         if (ret)
1179                 return ret;
1180         /*
1181          * Issue Soft Reset to the MAC.  This will reset the chip's
1182          * transmit, receive, DMA.  It will not effect
1183          * the current PCI configuration.  The global reset bit is self-
1184          * clearing, and should clear within a microsecond.
1185          */
1186         AT_WRITE_REGW(hw, REG_MASTER_CTRL, MASTER_CTRL_SOFT_RST);
1187         AT_WRITE_FLUSH(hw);
1188         msleep(10);
1189         /* Wait at least 10ms for All module to be Idle */
1190
1191         if (atl1c_wait_until_idle(hw)) {
1192                 dev_err(&pdev->dev,
1193                         "MAC state machine can't be idle since"
1194                         " disabled for 10ms second\n");
1195                 return -1;
1196         }
1197         return 0;
1198 }
1199
1200 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1201 {
1202         u32 pm_ctrl_data;
1203
1204         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1205         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1206                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1207         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1208         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1209         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1210         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1211         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1212
1213         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1214         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1215         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1216         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1217 }
1218
1219 /*
1220  * Set ASPM state.
1221  * Enable/disable L0s/L1 depend on link state.
1222  */
1223 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1224 {
1225         u32 pm_ctrl_data;
1226
1227         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1228
1229         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1230         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1231                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1232
1233         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1234
1235         if (linkup) {
1236                 pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1237                 pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1238
1239                 pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1240                 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1241         } else {
1242                 pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1243                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1244                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1245                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1246
1247                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1248
1249                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1250                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1251                 else
1252                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1253         }
1254
1255         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1256 }
1257
1258 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1259 {
1260         struct atl1c_hw *hw = &adapter->hw;
1261         struct net_device *netdev = adapter->netdev;
1262         u32 mac_ctrl_data;
1263
1264         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1265         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1266
1267         if (adapter->link_duplex == FULL_DUPLEX) {
1268                 hw->mac_duplex = true;
1269                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1270         }
1271
1272         if (adapter->link_speed == SPEED_1000)
1273                 hw->mac_speed = atl1c_mac_speed_1000;
1274         else
1275                 hw->mac_speed = atl1c_mac_speed_10_100;
1276
1277         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1278                         MAC_CTRL_SPEED_SHIFT;
1279
1280         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1281         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1282                         MAC_CTRL_PRMLEN_SHIFT);
1283
1284         if (adapter->vlgrp)
1285                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1286
1287         mac_ctrl_data |= MAC_CTRL_BC_EN;
1288         if (netdev->flags & IFF_PROMISC)
1289                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1290         if (netdev->flags & IFF_ALLMULTI)
1291                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1292
1293         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1294         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1295 }
1296
1297 /*
1298  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1299  * @adapter: board private structure
1300  *
1301  * Configure the Tx /Rx unit of the MAC after a reset.
1302  */
1303 static int atl1c_configure(struct atl1c_adapter *adapter)
1304 {
1305         struct atl1c_hw *hw = &adapter->hw;
1306         u32 master_ctrl_data = 0;
1307         u32 intr_modrt_data;
1308
1309         /* clear interrupt status */
1310         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1311         /*  Clear any WOL status */
1312         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1313         /* set Interrupt Clear Timer
1314          * HW will enable self to assert interrupt event to system after
1315          * waiting x-time for software to notify it accept interrupt.
1316          */
1317         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1318                 hw->ict & INT_RETRIG_TIMER_MASK);
1319
1320         atl1c_configure_des_ring(adapter);
1321
1322         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1323                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1324                                         IRQ_MODRT_TX_TIMER_SHIFT;
1325                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1326                                         IRQ_MODRT_RX_TIMER_SHIFT;
1327                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1328                 master_ctrl_data |=
1329                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1330         }
1331
1332         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1333                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1334
1335         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1336
1337         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1338                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1339                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1340                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1341                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1342         }
1343
1344         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1345                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1346                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1347         /* set MTU */
1348         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1349                         VLAN_HLEN + ETH_FCS_LEN);
1350         /* HDS, disable */
1351         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1352
1353         atl1c_configure_tx(adapter);
1354         atl1c_configure_rx(adapter);
1355         atl1c_configure_rss(adapter);
1356         atl1c_configure_dma(adapter);
1357
1358         return 0;
1359 }
1360
1361 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1362 {
1363         u16 hw_reg_addr = 0;
1364         unsigned long *stats_item = NULL;
1365         u32 data;
1366
1367         /* update rx status */
1368         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1369         stats_item  = &adapter->hw_stats.rx_ok;
1370         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1371                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1372                 *stats_item += data;
1373                 stats_item++;
1374                 hw_reg_addr += 4;
1375         }
1376 /* update tx status */
1377         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1378         stats_item  = &adapter->hw_stats.tx_ok;
1379         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1380                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1381                 *stats_item += data;
1382                 stats_item++;
1383                 hw_reg_addr += 4;
1384         }
1385 }
1386
1387 /*
1388  * atl1c_get_stats - Get System Network Statistics
1389  * @netdev: network interface device structure
1390  *
1391  * Returns the address of the device statistics structure.
1392  * The statistics are actually updated from the timer callback.
1393  */
1394 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1395 {
1396         struct atl1c_adapter *adapter = netdev_priv(netdev);
1397         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1398         struct net_device_stats *net_stats = &adapter->net_stats;
1399
1400         atl1c_update_hw_stats(adapter);
1401         net_stats->rx_packets = hw_stats->rx_ok;
1402         net_stats->tx_packets = hw_stats->tx_ok;
1403         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1404         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1405         net_stats->multicast  = hw_stats->rx_mcast;
1406         net_stats->collisions = hw_stats->tx_1_col +
1407                                 hw_stats->tx_2_col * 2 +
1408                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1409         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1410                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1411                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1412         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1413         net_stats->rx_length_errors = hw_stats->rx_len_err;
1414         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1415         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1416         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1417
1418         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1419
1420         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1421                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1422         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1423         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1424         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1425
1426         return &adapter->net_stats;
1427 }
1428
1429 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1430 {
1431         u16 phy_data;
1432
1433         spin_lock(&adapter->mdio_lock);
1434         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1435         spin_unlock(&adapter->mdio_lock);
1436 }
1437
1438 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1439                                 enum atl1c_trans_queue type)
1440 {
1441         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1442                                 &adapter->tpd_ring[type];
1443         struct atl1c_buffer *buffer_info;
1444         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1445         u16 hw_next_to_clean;
1446         u16 shift;
1447         u32 data;
1448
1449         if (type == atl1c_trans_high)
1450                 shift = MB_HTPD_CONS_IDX_SHIFT;
1451         else
1452                 shift = MB_NTPD_CONS_IDX_SHIFT;
1453
1454         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1455         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1456
1457         while (next_to_clean != hw_next_to_clean) {
1458                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1459                 if (buffer_info->state == ATL1_BUFFER_BUSY) {
1460                         pci_unmap_page(adapter->pdev, buffer_info->dma,
1461                                         buffer_info->length, PCI_DMA_TODEVICE);
1462                         buffer_info->dma = 0;
1463                         if (buffer_info->skb) {
1464                                 dev_kfree_skb_irq(buffer_info->skb);
1465                                 buffer_info->skb = NULL;
1466                         }
1467                         buffer_info->state = ATL1_BUFFER_FREE;
1468                 }
1469                 if (++next_to_clean == tpd_ring->count)
1470                         next_to_clean = 0;
1471                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1472         }
1473
1474         if (netif_queue_stopped(adapter->netdev) &&
1475                         netif_carrier_ok(adapter->netdev)) {
1476                 netif_wake_queue(adapter->netdev);
1477         }
1478
1479         return true;
1480 }
1481
1482 /*
1483  * atl1c_intr - Interrupt Handler
1484  * @irq: interrupt number
1485  * @data: pointer to a network interface device structure
1486  * @pt_regs: CPU registers structure
1487  */
1488 static irqreturn_t atl1c_intr(int irq, void *data)
1489 {
1490         struct net_device *netdev  = data;
1491         struct atl1c_adapter *adapter = netdev_priv(netdev);
1492         struct pci_dev *pdev = adapter->pdev;
1493         struct atl1c_hw *hw = &adapter->hw;
1494         int max_ints = AT_MAX_INT_WORK;
1495         int handled = IRQ_NONE;
1496         u32 status;
1497         u32 reg_data;
1498
1499         do {
1500                 AT_READ_REG(hw, REG_ISR, &reg_data);
1501                 status = reg_data & hw->intr_mask;
1502
1503                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1504                         if (max_ints != AT_MAX_INT_WORK)
1505                                 handled = IRQ_HANDLED;
1506                         break;
1507                 }
1508                 /* link event */
1509                 if (status & ISR_GPHY)
1510                         atl1c_clear_phy_int(adapter);
1511                 /* Ack ISR */
1512                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1513                 if (status & ISR_RX_PKT) {
1514                         if (likely(napi_schedule_prep(&adapter->napi))) {
1515                                 hw->intr_mask &= ~ISR_RX_PKT;
1516                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1517                                 __napi_schedule(&adapter->napi);
1518                         }
1519                 }
1520                 if (status & ISR_TX_PKT)
1521                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1522
1523                 handled = IRQ_HANDLED;
1524                 /* check if PCIE PHY Link down */
1525                 if (status & ISR_ERROR) {
1526                         if (netif_msg_hw(adapter))
1527                                 dev_err(&pdev->dev,
1528                                         "atl1c hardware error (status = 0x%x)\n",
1529                                         status & ISR_ERROR);
1530                         /* reset MAC */
1531                         hw->intr_mask &= ~ISR_ERROR;
1532                         AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1533                         adapter->work_event |= ATL1C_WORK_EVENT_RESET;
1534                         schedule_work(&adapter->common_task);
1535                         break;
1536                 }
1537
1538                 if (status & ISR_OVER)
1539                         if (netif_msg_intr(adapter))
1540                                 dev_warn(&pdev->dev,
1541                                         "TX/RX over flow (status = 0x%x)\n",
1542                                         status & ISR_OVER);
1543
1544                 /* link event */
1545                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1546                         adapter->net_stats.tx_carrier_errors++;
1547                         atl1c_link_chg_event(adapter);
1548                         break;
1549                 }
1550
1551         } while (--max_ints > 0);
1552         /* re-enable Interrupt*/
1553         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1554         return handled;
1555 }
1556
1557 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1558                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1559 {
1560         /*
1561          * The pid field in RRS in not correct sometimes, so we
1562          * cannot figure out if the packet is fragmented or not,
1563          * so we tell the KERNEL CHECKSUM_NONE
1564          */
1565         skb->ip_summed = CHECKSUM_NONE;
1566 }
1567
1568 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1569 {
1570         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1571         struct pci_dev *pdev = adapter->pdev;
1572         struct atl1c_buffer *buffer_info, *next_info;
1573         struct sk_buff *skb;
1574         void *vir_addr = NULL;
1575         u16 num_alloc = 0;
1576         u16 rfd_next_to_use, next_next;
1577         struct atl1c_rx_free_desc *rfd_desc;
1578
1579         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1580         if (++next_next == rfd_ring->count)
1581                 next_next = 0;
1582         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1583         next_info = &rfd_ring->buffer_info[next_next];
1584
1585         while (next_info->state == ATL1_BUFFER_FREE) {
1586                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1587
1588                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1589                 if (unlikely(!skb)) {
1590                         if (netif_msg_rx_err(adapter))
1591                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1592                         break;
1593                 }
1594
1595                 /*
1596                  * Make buffer alignment 2 beyond a 16 byte boundary
1597                  * this will result in a 16 byte aligned IP header after
1598                  * the 14 byte MAC header is removed
1599                  */
1600                 vir_addr = skb->data;
1601                 buffer_info->state = ATL1_BUFFER_BUSY;
1602                 buffer_info->skb = skb;
1603                 buffer_info->length = adapter->rx_buffer_len;
1604                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1605                                                 buffer_info->length,
1606                                                 PCI_DMA_FROMDEVICE);
1607                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1608                 rfd_next_to_use = next_next;
1609                 if (++next_next == rfd_ring->count)
1610                         next_next = 0;
1611                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1612                 next_info = &rfd_ring->buffer_info[next_next];
1613                 num_alloc++;
1614         }
1615
1616         if (num_alloc) {
1617                 /* TODO: update mailbox here */
1618                 wmb();
1619                 rfd_ring->next_to_use = rfd_next_to_use;
1620                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1621                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1622         }
1623
1624         return num_alloc;
1625 }
1626
1627 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1628                         struct  atl1c_recv_ret_status *rrs, u16 num)
1629 {
1630         u16 i;
1631         /* the relationship between rrd and rfd is one map one */
1632         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1633                                         rrd_ring->next_to_clean)) {
1634                 rrs->word3 &= ~RRS_RXD_UPDATED;
1635                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1636                         rrd_ring->next_to_clean = 0;
1637         }
1638 }
1639
1640 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1641         struct atl1c_recv_ret_status *rrs, u16 num)
1642 {
1643         u16 i;
1644         u16 rfd_index;
1645         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1646
1647         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1648                         RRS_RX_RFD_INDEX_MASK;
1649         for (i = 0; i < num; i++) {
1650                 buffer_info[rfd_index].skb = NULL;
1651                 buffer_info[rfd_index].state = ATL1_BUFFER_FREE;
1652                 if (++rfd_index == rfd_ring->count)
1653                         rfd_index = 0;
1654         }
1655         rfd_ring->next_to_clean = rfd_index;
1656 }
1657
1658 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1659                    int *work_done, int work_to_do)
1660 {
1661         u16 rfd_num, rfd_index;
1662         u16 count = 0;
1663         u16 length;
1664         struct pci_dev *pdev = adapter->pdev;
1665         struct net_device *netdev  = adapter->netdev;
1666         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1667         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1668         struct sk_buff *skb;
1669         struct atl1c_recv_ret_status *rrs;
1670         struct atl1c_buffer *buffer_info;
1671
1672         while (1) {
1673                 if (*work_done >= work_to_do)
1674                         break;
1675                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1676                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1677                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1678                                 RRS_RX_RFD_CNT_MASK;
1679                         if (unlikely(rfd_num != 1))
1680                                 /* TODO support mul rfd*/
1681                                 if (netif_msg_rx_err(adapter))
1682                                         dev_warn(&pdev->dev,
1683                                                 "Multi rfd not support yet!\n");
1684                         goto rrs_checked;
1685                 } else {
1686                         break;
1687                 }
1688 rrs_checked:
1689                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1690                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1691                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1692                                 if (netif_msg_rx_err(adapter))
1693                                         dev_warn(&pdev->dev,
1694                                                 "wrong packet! rrs word3 is %x\n",
1695                                                 rrs->word3);
1696                         continue;
1697                 }
1698
1699                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1700                                 RRS_PKT_SIZE_MASK);
1701                 /* Good Receive */
1702                 if (likely(rfd_num == 1)) {
1703                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1704                                         RRS_RX_RFD_INDEX_MASK;
1705                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1706                         pci_unmap_single(pdev, buffer_info->dma,
1707                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1708                         skb = buffer_info->skb;
1709                 } else {
1710                         /* TODO */
1711                         if (netif_msg_rx_err(adapter))
1712                                 dev_warn(&pdev->dev,
1713                                         "Multi rfd not support yet!\n");
1714                         break;
1715                 }
1716                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1717                 skb_put(skb, length - ETH_FCS_LEN);
1718                 skb->protocol = eth_type_trans(skb, netdev);
1719                 skb->dev = netdev;
1720                 atl1c_rx_checksum(adapter, skb, rrs);
1721                 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1722                         u16 vlan;
1723
1724                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1725                         vlan = le16_to_cpu(vlan);
1726                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1727                 } else
1728                         netif_receive_skb(skb);
1729
1730                 (*work_done)++;
1731                 count++;
1732         }
1733         if (count)
1734                 atl1c_alloc_rx_buffer(adapter, que);
1735 }
1736
1737 /*
1738  * atl1c_clean - NAPI Rx polling callback
1739  * @adapter: board private structure
1740  */
1741 static int atl1c_clean(struct napi_struct *napi, int budget)
1742 {
1743         struct atl1c_adapter *adapter =
1744                         container_of(napi, struct atl1c_adapter, napi);
1745         int work_done = 0;
1746
1747         /* Keep link state information with original netdev */
1748         if (!netif_carrier_ok(adapter->netdev))
1749                 goto quit_polling;
1750         /* just enable one RXQ */
1751         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1752
1753         if (work_done < budget) {
1754 quit_polling:
1755                 napi_complete(napi);
1756                 adapter->hw.intr_mask |= ISR_RX_PKT;
1757                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1758         }
1759         return work_done;
1760 }
1761
1762 #ifdef CONFIG_NET_POLL_CONTROLLER
1763
1764 /*
1765  * Polling 'interrupt' - used by things like netconsole to send skbs
1766  * without having to re-enable interrupts. It's not called while
1767  * the interrupt routine is executing.
1768  */
1769 static void atl1c_netpoll(struct net_device *netdev)
1770 {
1771         struct atl1c_adapter *adapter = netdev_priv(netdev);
1772
1773         disable_irq(adapter->pdev->irq);
1774         atl1c_intr(adapter->pdev->irq, netdev);
1775         enable_irq(adapter->pdev->irq);
1776 }
1777 #endif
1778
1779 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1780 {
1781         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1782         u16 next_to_use = 0;
1783         u16 next_to_clean = 0;
1784
1785         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1786         next_to_use   = tpd_ring->next_to_use;
1787
1788         return (u16)(next_to_clean > next_to_use) ?
1789                 (next_to_clean - next_to_use - 1) :
1790                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1791 }
1792
1793 /*
1794  * get next usable tpd
1795  * Note: should call atl1c_tdp_avail to make sure
1796  * there is enough tpd to use
1797  */
1798 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1799         enum atl1c_trans_queue type)
1800 {
1801         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1802         struct atl1c_tpd_desc *tpd_desc;
1803         u16 next_to_use = 0;
1804
1805         next_to_use = tpd_ring->next_to_use;
1806         if (++tpd_ring->next_to_use == tpd_ring->count)
1807                 tpd_ring->next_to_use = 0;
1808         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1809         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1810         return  tpd_desc;
1811 }
1812
1813 static struct atl1c_buffer *
1814 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1815 {
1816         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1817
1818         return &tpd_ring->buffer_info[tpd -
1819                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1820 }
1821
1822 /* Calculate the transmit packet descript needed*/
1823 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1824 {
1825         u16 tpd_req;
1826         u16 proto_hdr_len = 0;
1827
1828         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1829
1830         if (skb_is_gso(skb)) {
1831                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1832                 if (proto_hdr_len < skb_headlen(skb))
1833                         tpd_req++;
1834                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1835                         tpd_req++;
1836         }
1837         return tpd_req;
1838 }
1839
1840 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1841                           struct sk_buff *skb,
1842                           struct atl1c_tpd_desc **tpd,
1843                           enum atl1c_trans_queue type)
1844 {
1845         struct pci_dev *pdev = adapter->pdev;
1846         u8 hdr_len;
1847         u32 real_len;
1848         unsigned short offload_type;
1849         int err;
1850
1851         if (skb_is_gso(skb)) {
1852                 if (skb_header_cloned(skb)) {
1853                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1854                         if (unlikely(err))
1855                                 return -1;
1856                 }
1857                 offload_type = skb_shinfo(skb)->gso_type;
1858
1859                 if (offload_type & SKB_GSO_TCPV4) {
1860                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1861                                         + ntohs(ip_hdr(skb)->tot_len));
1862
1863                         if (real_len < skb->len)
1864                                 pskb_trim(skb, real_len);
1865
1866                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1867                         if (unlikely(skb->len == hdr_len)) {
1868                                 /* only xsum need */
1869                                 if (netif_msg_tx_queued(adapter))
1870                                         dev_warn(&pdev->dev,
1871                                                 "IPV4 tso with zero data??\n");
1872                                 goto check_sum;
1873                         } else {
1874                                 ip_hdr(skb)->check = 0;
1875                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1876                                                         ip_hdr(skb)->saddr,
1877                                                         ip_hdr(skb)->daddr,
1878                                                         0, IPPROTO_TCP, 0);
1879                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1880                         }
1881                 }
1882
1883                 if (offload_type & SKB_GSO_TCPV6) {
1884                         struct atl1c_tpd_ext_desc *etpd =
1885                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1886
1887                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1888                         *tpd = atl1c_get_tpd(adapter, type);
1889                         ipv6_hdr(skb)->payload_len = 0;
1890                         /* check payload == 0 byte ? */
1891                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1892                         if (unlikely(skb->len == hdr_len)) {
1893                                 /* only xsum need */
1894                                 if (netif_msg_tx_queued(adapter))
1895                                         dev_warn(&pdev->dev,
1896                                                 "IPV6 tso with zero data??\n");
1897                                 goto check_sum;
1898                         } else
1899                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1900                                                 &ipv6_hdr(skb)->saddr,
1901                                                 &ipv6_hdr(skb)->daddr,
1902                                                 0, IPPROTO_TCP, 0);
1903                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
1904                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
1905                         etpd->pkt_len = cpu_to_le32(skb->len);
1906                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
1907                 }
1908
1909                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
1910                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
1911                                 TPD_TCPHDR_OFFSET_SHIFT;
1912                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
1913                                 TPD_MSS_SHIFT;
1914                 return 0;
1915         }
1916
1917 check_sum:
1918         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1919                 u8 css, cso;
1920                 cso = skb_transport_offset(skb);
1921
1922                 if (unlikely(cso & 0x1)) {
1923                         if (netif_msg_tx_err(adapter))
1924                                 dev_err(&adapter->pdev->dev,
1925                                         "payload offset should not an event number\n");
1926                         return -1;
1927                 } else {
1928                         css = cso + skb->csum_offset;
1929
1930                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
1931                                         TPD_PLOADOFFSET_SHIFT;
1932                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
1933                                         TPD_CCSUM_OFFSET_SHIFT;
1934                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
1935                 }
1936         }
1937         return 0;
1938 }
1939
1940 static void atl1c_tx_map(struct atl1c_adapter *adapter,
1941                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
1942                         enum atl1c_trans_queue type)
1943 {
1944         struct atl1c_tpd_desc *use_tpd = NULL;
1945         struct atl1c_buffer *buffer_info = NULL;
1946         u16 buf_len = skb_headlen(skb);
1947         u16 map_len = 0;
1948         u16 mapped_len = 0;
1949         u16 hdr_len = 0;
1950         u16 nr_frags;
1951         u16 f;
1952         int tso;
1953
1954         nr_frags = skb_shinfo(skb)->nr_frags;
1955         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
1956         if (tso) {
1957                 /* TSO */
1958                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1959                 use_tpd = tpd;
1960
1961                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1962                 buffer_info->length = map_len;
1963                 buffer_info->dma = pci_map_single(adapter->pdev,
1964                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1965                 buffer_info->state = ATL1_BUFFER_BUSY;
1966                 mapped_len += map_len;
1967                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1968                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
1969         }
1970
1971         if (mapped_len < buf_len) {
1972                 /* mapped_len == 0, means we should use the first tpd,
1973                    which is given by caller  */
1974                 if (mapped_len == 0)
1975                         use_tpd = tpd;
1976                 else {
1977                         use_tpd = atl1c_get_tpd(adapter, type);
1978                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1979                 }
1980                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
1981                 buffer_info->length = buf_len - mapped_len;
1982                 buffer_info->dma =
1983                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1984                                         buffer_info->length, PCI_DMA_TODEVICE);
1985                 buffer_info->state = ATL1_BUFFER_BUSY;
1986
1987                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
1988                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
1989         }
1990
1991         for (f = 0; f < nr_frags; f++) {
1992                 struct skb_frag_struct *frag;
1993
1994                 frag = &skb_shinfo(skb)->frags[f];
1995
1996                 use_tpd = atl1c_get_tpd(adapter, type);
1997                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
1998
1999                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2000                 buffer_info->length = frag->size;
2001                 buffer_info->dma =
2002                         pci_map_page(adapter->pdev, frag->page,
2003                                         frag->page_offset,
2004                                         buffer_info->length,
2005                                         PCI_DMA_TODEVICE);
2006                 buffer_info->state = ATL1_BUFFER_BUSY;
2007
2008                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2009                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2010         }
2011
2012         /* The last tpd */
2013         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2014         /* The last buffer info contain the skb address,
2015            so it will be free after unmap */
2016         buffer_info->skb = skb;
2017 }
2018
2019 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2020                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2021 {
2022         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2023         u32 prod_data;
2024
2025         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2026         switch (type) {
2027         case atl1c_trans_high:
2028                 prod_data &= 0xFFFF0000;
2029                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2030                 break;
2031         case atl1c_trans_normal:
2032                 prod_data &= 0x0000FFFF;
2033                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2034                 break;
2035         default:
2036                 break;
2037         }
2038         wmb();
2039         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2040 }
2041
2042 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2043                                           struct net_device *netdev)
2044 {
2045         struct atl1c_adapter *adapter = netdev_priv(netdev);
2046         unsigned long flags;
2047         u16 tpd_req = 1;
2048         struct atl1c_tpd_desc *tpd;
2049         enum atl1c_trans_queue type = atl1c_trans_normal;
2050
2051         if (test_bit(__AT_DOWN, &adapter->flags)) {
2052                 dev_kfree_skb_any(skb);
2053                 return NETDEV_TX_OK;
2054         }
2055
2056         tpd_req = atl1c_cal_tpd_req(skb);
2057         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2058                 if (netif_msg_pktdata(adapter))
2059                         dev_info(&adapter->pdev->dev, "tx locked\n");
2060                 return NETDEV_TX_LOCKED;
2061         }
2062         if (skb->mark == 0x01)
2063                 type = atl1c_trans_high;
2064         else
2065                 type = atl1c_trans_normal;
2066
2067         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2068                 /* no enough descriptor, just stop queue */
2069                 netif_stop_queue(netdev);
2070                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2071                 return NETDEV_TX_BUSY;
2072         }
2073
2074         tpd = atl1c_get_tpd(adapter, type);
2075
2076         /* do TSO and check sum */
2077         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2078                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2079                 dev_kfree_skb_any(skb);
2080                 return NETDEV_TX_OK;
2081         }
2082
2083         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2084                 u16 vlan = vlan_tx_tag_get(skb);
2085                 __le16 tag;
2086
2087                 vlan = cpu_to_le16(vlan);
2088                 AT_VLAN_TO_TAG(vlan, tag);
2089                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2090                 tpd->vlan_tag = tag;
2091         }
2092
2093         if (skb_network_offset(skb) != ETH_HLEN)
2094                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2095
2096         atl1c_tx_map(adapter, skb, tpd, type);
2097         atl1c_tx_queue(adapter, skb, tpd, type);
2098
2099         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2100         return NETDEV_TX_OK;
2101 }
2102
2103 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2104 {
2105         struct net_device *netdev = adapter->netdev;
2106
2107         free_irq(adapter->pdev->irq, netdev);
2108
2109         if (adapter->have_msi)
2110                 pci_disable_msi(adapter->pdev);
2111 }
2112
2113 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2114 {
2115         struct pci_dev    *pdev   = adapter->pdev;
2116         struct net_device *netdev = adapter->netdev;
2117         int flags = 0;
2118         int err = 0;
2119
2120         adapter->have_msi = true;
2121         err = pci_enable_msi(adapter->pdev);
2122         if (err) {
2123                 if (netif_msg_ifup(adapter))
2124                         dev_err(&pdev->dev,
2125                                 "Unable to allocate MSI interrupt Error: %d\n",
2126                                 err);
2127                 adapter->have_msi = false;
2128         } else
2129                 netdev->irq = pdev->irq;
2130
2131         if (!adapter->have_msi)
2132                 flags |= IRQF_SHARED;
2133         err = request_irq(adapter->pdev->irq, &atl1c_intr, flags,
2134                         netdev->name, netdev);
2135         if (err) {
2136                 if (netif_msg_ifup(adapter))
2137                         dev_err(&pdev->dev,
2138                                 "Unable to allocate interrupt Error: %d\n",
2139                                 err);
2140                 if (adapter->have_msi)
2141                         pci_disable_msi(adapter->pdev);
2142                 return err;
2143         }
2144         if (netif_msg_ifup(adapter))
2145                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2146         return err;
2147 }
2148
2149 int atl1c_up(struct atl1c_adapter *adapter)
2150 {
2151         struct net_device *netdev = adapter->netdev;
2152         int num;
2153         int err;
2154         int i;
2155
2156         netif_carrier_off(netdev);
2157         atl1c_init_ring_ptrs(adapter);
2158         atl1c_set_multi(netdev);
2159         atl1c_restore_vlan(adapter);
2160
2161         for (i = 0; i < adapter->num_rx_queues; i++) {
2162                 num = atl1c_alloc_rx_buffer(adapter, i);
2163                 if (unlikely(num == 0)) {
2164                         err = -ENOMEM;
2165                         goto err_alloc_rx;
2166                 }
2167         }
2168
2169         if (atl1c_configure(adapter)) {
2170                 err = -EIO;
2171                 goto err_up;
2172         }
2173
2174         err = atl1c_request_irq(adapter);
2175         if (unlikely(err))
2176                 goto err_up;
2177
2178         clear_bit(__AT_DOWN, &adapter->flags);
2179         napi_enable(&adapter->napi);
2180         atl1c_irq_enable(adapter);
2181         atl1c_check_link_status(adapter);
2182         netif_start_queue(netdev);
2183         return err;
2184
2185 err_up:
2186 err_alloc_rx:
2187         atl1c_clean_rx_ring(adapter);
2188         return err;
2189 }
2190
2191 void atl1c_down(struct atl1c_adapter *adapter)
2192 {
2193         struct net_device *netdev = adapter->netdev;
2194
2195         atl1c_del_timer(adapter);
2196         adapter->work_event = 0; /* clear all event */
2197         /* signal that we're down so the interrupt handler does not
2198          * reschedule our watchdog timer */
2199         set_bit(__AT_DOWN, &adapter->flags);
2200         netif_carrier_off(netdev);
2201         napi_disable(&adapter->napi);
2202         atl1c_irq_disable(adapter);
2203         atl1c_free_irq(adapter);
2204         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
2205         /* reset MAC to disable all RX/TX */
2206         atl1c_reset_mac(&adapter->hw);
2207         msleep(1);
2208
2209         adapter->link_speed = SPEED_0;
2210         adapter->link_duplex = -1;
2211         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2212         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2213         atl1c_clean_rx_ring(adapter);
2214 }
2215
2216 /*
2217  * atl1c_open - Called when a network interface is made active
2218  * @netdev: network interface device structure
2219  *
2220  * Returns 0 on success, negative value on failure
2221  *
2222  * The open entry point is called when a network interface is made
2223  * active by the system (IFF_UP).  At this point all resources needed
2224  * for transmit and receive operations are allocated, the interrupt
2225  * handler is registered with the OS, the watchdog timer is started,
2226  * and the stack is notified that the interface is ready.
2227  */
2228 static int atl1c_open(struct net_device *netdev)
2229 {
2230         struct atl1c_adapter *adapter = netdev_priv(netdev);
2231         int err;
2232
2233         /* disallow open during test */
2234         if (test_bit(__AT_TESTING, &adapter->flags))
2235                 return -EBUSY;
2236
2237         /* allocate rx/tx dma buffer & descriptors */
2238         err = atl1c_setup_ring_resources(adapter);
2239         if (unlikely(err))
2240                 return err;
2241
2242         err = atl1c_up(adapter);
2243         if (unlikely(err))
2244                 goto err_up;
2245
2246         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2247                 u32 phy_data;
2248
2249                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2250                 phy_data |= MDIO_AP_EN;
2251                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2252         }
2253         return 0;
2254
2255 err_up:
2256         atl1c_free_irq(adapter);
2257         atl1c_free_ring_resources(adapter);
2258         atl1c_reset_mac(&adapter->hw);
2259         return err;
2260 }
2261
2262 /*
2263  * atl1c_close - Disables a network interface
2264  * @netdev: network interface device structure
2265  *
2266  * Returns 0, this is not allowed to fail
2267  *
2268  * The close entry point is called when an interface is de-activated
2269  * by the OS.  The hardware is still under the drivers control, but
2270  * needs to be disabled.  A global MAC reset is issued to stop the
2271  * hardware, and all transmit and receive resources are freed.
2272  */
2273 static int atl1c_close(struct net_device *netdev)
2274 {
2275         struct atl1c_adapter *adapter = netdev_priv(netdev);
2276
2277         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2278         atl1c_down(adapter);
2279         atl1c_free_ring_resources(adapter);
2280         return 0;
2281 }
2282
2283 static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2284 {
2285         struct net_device *netdev = pci_get_drvdata(pdev);
2286         struct atl1c_adapter *adapter = netdev_priv(netdev);
2287         struct atl1c_hw *hw = &adapter->hw;
2288         u32 ctrl;
2289         u32 mac_ctrl_data;
2290         u32 master_ctrl_data;
2291         u32 wol_ctrl_data = 0;
2292         u16 mii_bmsr_data;
2293         u16 save_autoneg_advertised;
2294         u16 mii_intr_status_data;
2295         u32 wufc = adapter->wol;
2296         u32 i;
2297         int retval = 0;
2298
2299         if (netif_running(netdev)) {
2300                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2301                 atl1c_down(adapter);
2302         }
2303         netif_device_detach(netdev);
2304         atl1c_disable_l0s_l1(hw);
2305         retval = pci_save_state(pdev);
2306         if (retval)
2307                 return retval;
2308         if (wufc) {
2309                 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2310                 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2311
2312                 /* get link status */
2313                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2314                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2315                 save_autoneg_advertised = hw->autoneg_advertised;
2316                 hw->autoneg_advertised = ADVERTISED_10baseT_Half;
2317                 if (atl1c_restart_autoneg(hw) != 0)
2318                         if (netif_msg_link(adapter))
2319                                 dev_warn(&pdev->dev, "phy autoneg failed\n");
2320                 hw->phy_configured = false; /* re-init PHY when resume */
2321                 hw->autoneg_advertised = save_autoneg_advertised;
2322                 /* turn on magic packet wol */
2323                 if (wufc & AT_WUFC_MAG)
2324                         wol_ctrl_data = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2325
2326                 if (wufc & AT_WUFC_LNKC) {
2327                         for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2328                                 msleep(100);
2329                                 atl1c_read_phy_reg(hw, MII_BMSR,
2330                                         (u16 *)&mii_bmsr_data);
2331                                 if (mii_bmsr_data & BMSR_LSTATUS)
2332                                         break;
2333                         }
2334                         if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2335                                 if (netif_msg_link(adapter))
2336                                         dev_warn(&pdev->dev,
2337                                                 "%s: Link may change"
2338                                                 "when suspend\n",
2339                                                 atl1c_driver_name);
2340                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2341                         /* only link up can wake up */
2342                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2343                                 if (netif_msg_link(adapter))
2344                                         dev_err(&pdev->dev,
2345                                                 "%s: read write phy "
2346                                                 "register failed.\n",
2347                                                 atl1c_driver_name);
2348                                 goto wol_dis;
2349                         }
2350                 }
2351                 /* clear phy interrupt */
2352                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2353                 /* Config MAC Ctrl register */
2354                 mac_ctrl_data = MAC_CTRL_RX_EN;
2355                 /* set to 10/100M halt duplex */
2356                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2357                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2358                                  MAC_CTRL_PRMLEN_MASK) <<
2359                                  MAC_CTRL_PRMLEN_SHIFT);
2360
2361                 if (adapter->vlgrp)
2362                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2363
2364                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2365                 if (wufc & AT_WUFC_MAG)
2366                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2367
2368                 if (netif_msg_hw(adapter))
2369                         dev_dbg(&pdev->dev,
2370                                 "%s: suspend MAC=0x%x\n",
2371                                 atl1c_driver_name, mac_ctrl_data);
2372                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2373                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2374                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2375
2376                 /* pcie patch */
2377                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2378                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2379                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2380
2381                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2382                 goto suspend_exit;
2383         }
2384 wol_dis:
2385
2386         /* WOL disabled */
2387         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2388
2389         /* pcie patch */
2390         AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2391         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2392         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2393
2394         atl1c_phy_disable(hw);
2395         hw->phy_configured = false; /* re-init PHY when resume */
2396
2397         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2398 suspend_exit:
2399
2400         pci_disable_device(pdev);
2401         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2402
2403         return 0;
2404 }
2405
2406 static int atl1c_resume(struct pci_dev *pdev)
2407 {
2408         struct net_device *netdev = pci_get_drvdata(pdev);
2409         struct atl1c_adapter *adapter = netdev_priv(netdev);
2410
2411         pci_set_power_state(pdev, PCI_D0);
2412         pci_restore_state(pdev);
2413         pci_enable_wake(pdev, PCI_D3hot, 0);
2414         pci_enable_wake(pdev, PCI_D3cold, 0);
2415
2416         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2417
2418         atl1c_phy_reset(&adapter->hw);
2419         atl1c_reset_mac(&adapter->hw);
2420         netif_device_attach(netdev);
2421         if (netif_running(netdev))
2422                 atl1c_up(adapter);
2423
2424         return 0;
2425 }
2426
2427 static void atl1c_shutdown(struct pci_dev *pdev)
2428 {
2429         atl1c_suspend(pdev, PMSG_SUSPEND);
2430 }
2431
2432 static const struct net_device_ops atl1c_netdev_ops = {
2433         .ndo_open               = atl1c_open,
2434         .ndo_stop               = atl1c_close,
2435         .ndo_validate_addr      = eth_validate_addr,
2436         .ndo_start_xmit         = atl1c_xmit_frame,
2437         .ndo_set_mac_address    = atl1c_set_mac_addr,
2438         .ndo_set_multicast_list = atl1c_set_multi,
2439         .ndo_change_mtu         = atl1c_change_mtu,
2440         .ndo_do_ioctl           = atl1c_ioctl,
2441         .ndo_tx_timeout         = atl1c_tx_timeout,
2442         .ndo_get_stats          = atl1c_get_stats,
2443         .ndo_vlan_rx_register   = atl1c_vlan_rx_register,
2444 #ifdef CONFIG_NET_POLL_CONTROLLER
2445         .ndo_poll_controller    = atl1c_netpoll,
2446 #endif
2447 };
2448
2449 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2450 {
2451         SET_NETDEV_DEV(netdev, &pdev->dev);
2452         pci_set_drvdata(pdev, netdev);
2453
2454         netdev->irq  = pdev->irq;
2455         netdev->netdev_ops = &atl1c_netdev_ops;
2456         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2457         atl1c_set_ethtool_ops(netdev);
2458
2459         /* TODO: add when ready */
2460         netdev->features =      NETIF_F_SG         |
2461                                 NETIF_F_HW_CSUM    |
2462                                 NETIF_F_HW_VLAN_TX |
2463                                 NETIF_F_HW_VLAN_RX |
2464                                 NETIF_F_TSO        |
2465                                 NETIF_F_TSO6;
2466         return 0;
2467 }
2468
2469 /*
2470  * atl1c_probe - Device Initialization Routine
2471  * @pdev: PCI device information struct
2472  * @ent: entry in atl1c_pci_tbl
2473  *
2474  * Returns 0 on success, negative on failure
2475  *
2476  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2477  * The OS initialization, configuring of the adapter private structure,
2478  * and a hardware reset occur.
2479  */
2480 static int __devinit atl1c_probe(struct pci_dev *pdev,
2481                                  const struct pci_device_id *ent)
2482 {
2483         struct net_device *netdev;
2484         struct atl1c_adapter *adapter;
2485         static int cards_found;
2486
2487         int err = 0;
2488
2489         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2490         err = pci_enable_device_mem(pdev);
2491         if (err) {
2492                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2493                 return err;
2494         }
2495
2496         /*
2497          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2498          * shared register for the high 32 bits, so only a single, aligned,
2499          * 4 GB physical address range can be used at a time.
2500          *
2501          * Supporting 64-bit DMA on this hardware is more trouble than it's
2502          * worth.  It is far easier to limit to 32-bit DMA than update
2503          * various kernel subsystems to support the mechanics required by a
2504          * fixed-high-32-bit system.
2505          */
2506         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2507             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2508                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2509                 goto err_dma;
2510         }
2511
2512         err = pci_request_regions(pdev, atl1c_driver_name);
2513         if (err) {
2514                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2515                 goto err_pci_reg;
2516         }
2517
2518         pci_set_master(pdev);
2519
2520         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2521         if (netdev == NULL) {
2522                 err = -ENOMEM;
2523                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2524                 goto err_alloc_etherdev;
2525         }
2526
2527         err = atl1c_init_netdev(netdev, pdev);
2528         if (err) {
2529                 dev_err(&pdev->dev, "init netdevice failed\n");
2530                 goto err_init_netdev;
2531         }
2532         adapter = netdev_priv(netdev);
2533         adapter->bd_number = cards_found;
2534         adapter->netdev = netdev;
2535         adapter->pdev = pdev;
2536         adapter->hw.adapter = adapter;
2537         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2538         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2539         if (!adapter->hw.hw_addr) {
2540                 err = -EIO;
2541                 dev_err(&pdev->dev, "cannot map device registers\n");
2542                 goto err_ioremap;
2543         }
2544         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2545
2546         /* init mii data */
2547         adapter->mii.dev = netdev;
2548         adapter->mii.mdio_read  = atl1c_mdio_read;
2549         adapter->mii.mdio_write = atl1c_mdio_write;
2550         adapter->mii.phy_id_mask = 0x1f;
2551         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2552         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2553         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2554                         (unsigned long)adapter);
2555         /* setup the private structure */
2556         err = atl1c_sw_init(adapter);
2557         if (err) {
2558                 dev_err(&pdev->dev, "net device private data init failed\n");
2559                 goto err_sw_init;
2560         }
2561         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2562                         ATL1C_PCIE_PHY_RESET);
2563
2564         /* Init GPHY as early as possible due to power saving issue  */
2565         atl1c_phy_reset(&adapter->hw);
2566
2567         err = atl1c_reset_mac(&adapter->hw);
2568         if (err) {
2569                 err = -EIO;
2570                 goto err_reset;
2571         }
2572
2573         device_init_wakeup(&pdev->dev, 1);
2574         /* reset the controller to
2575          * put the device in a known good starting state */
2576         err = atl1c_phy_init(&adapter->hw);
2577         if (err) {
2578                 err = -EIO;
2579                 goto err_reset;
2580         }
2581         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2582                 err = -EIO;
2583                 dev_err(&pdev->dev, "get mac address failed\n");
2584                 goto err_eeprom;
2585         }
2586         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2587         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2588         if (netif_msg_probe(adapter))
2589                 dev_dbg(&pdev->dev,
2590                         "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2591                         adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2592                         adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2593                         adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2594
2595         atl1c_hw_set_mac_addr(&adapter->hw);
2596         INIT_WORK(&adapter->common_task, atl1c_common_task);
2597         adapter->work_event = 0;
2598         err = register_netdev(netdev);
2599         if (err) {
2600                 dev_err(&pdev->dev, "register netdevice failed\n");
2601                 goto err_register;
2602         }
2603
2604         if (netif_msg_probe(adapter))
2605                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2606         cards_found++;
2607         return 0;
2608
2609 err_reset:
2610 err_register:
2611 err_sw_init:
2612 err_eeprom:
2613         iounmap(adapter->hw.hw_addr);
2614 err_init_netdev:
2615 err_ioremap:
2616         free_netdev(netdev);
2617 err_alloc_etherdev:
2618         pci_release_regions(pdev);
2619 err_pci_reg:
2620 err_dma:
2621         pci_disable_device(pdev);
2622         return err;
2623 }
2624
2625 /*
2626  * atl1c_remove - Device Removal Routine
2627  * @pdev: PCI device information struct
2628  *
2629  * atl1c_remove is called by the PCI subsystem to alert the driver
2630  * that it should release a PCI device.  The could be caused by a
2631  * Hot-Plug event, or because the driver is going to be removed from
2632  * memory.
2633  */
2634 static void __devexit atl1c_remove(struct pci_dev *pdev)
2635 {
2636         struct net_device *netdev = pci_get_drvdata(pdev);
2637         struct atl1c_adapter *adapter = netdev_priv(netdev);
2638
2639         unregister_netdev(netdev);
2640         atl1c_phy_disable(&adapter->hw);
2641
2642         iounmap(adapter->hw.hw_addr);
2643
2644         pci_release_regions(pdev);
2645         pci_disable_device(pdev);
2646         free_netdev(netdev);
2647 }
2648
2649 /*
2650  * atl1c_io_error_detected - called when PCI error is detected
2651  * @pdev: Pointer to PCI device
2652  * @state: The current pci connection state
2653  *
2654  * This function is called after a PCI bus error affecting
2655  * this device has been detected.
2656  */
2657 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2658                                                 pci_channel_state_t state)
2659 {
2660         struct net_device *netdev = pci_get_drvdata(pdev);
2661         struct atl1c_adapter *adapter = netdev_priv(netdev);
2662
2663         netif_device_detach(netdev);
2664
2665         if (state == pci_channel_io_perm_failure)
2666                 return PCI_ERS_RESULT_DISCONNECT;
2667
2668         if (netif_running(netdev))
2669                 atl1c_down(adapter);
2670
2671         pci_disable_device(pdev);
2672
2673         /* Request a slot slot reset. */
2674         return PCI_ERS_RESULT_NEED_RESET;
2675 }
2676
2677 /*
2678  * atl1c_io_slot_reset - called after the pci bus has been reset.
2679  * @pdev: Pointer to PCI device
2680  *
2681  * Restart the card from scratch, as if from a cold-boot. Implementation
2682  * resembles the first-half of the e1000_resume routine.
2683  */
2684 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2685 {
2686         struct net_device *netdev = pci_get_drvdata(pdev);
2687         struct atl1c_adapter *adapter = netdev_priv(netdev);
2688
2689         if (pci_enable_device(pdev)) {
2690                 if (netif_msg_hw(adapter))
2691                         dev_err(&pdev->dev,
2692                                 "Cannot re-enable PCI device after reset\n");
2693                 return PCI_ERS_RESULT_DISCONNECT;
2694         }
2695         pci_set_master(pdev);
2696
2697         pci_enable_wake(pdev, PCI_D3hot, 0);
2698         pci_enable_wake(pdev, PCI_D3cold, 0);
2699
2700         atl1c_reset_mac(&adapter->hw);
2701
2702         return PCI_ERS_RESULT_RECOVERED;
2703 }
2704
2705 /*
2706  * atl1c_io_resume - called when traffic can start flowing again.
2707  * @pdev: Pointer to PCI device
2708  *
2709  * This callback is called when the error recovery driver tells us that
2710  * its OK to resume normal operation. Implementation resembles the
2711  * second-half of the atl1c_resume routine.
2712  */
2713 static void atl1c_io_resume(struct pci_dev *pdev)
2714 {
2715         struct net_device *netdev = pci_get_drvdata(pdev);
2716         struct atl1c_adapter *adapter = netdev_priv(netdev);
2717
2718         if (netif_running(netdev)) {
2719                 if (atl1c_up(adapter)) {
2720                         if (netif_msg_hw(adapter))
2721                                 dev_err(&pdev->dev,
2722                                         "Cannot bring device back up after reset\n");
2723                         return;
2724                 }
2725         }
2726
2727         netif_device_attach(netdev);
2728 }
2729
2730 static struct pci_error_handlers atl1c_err_handler = {
2731         .error_detected = atl1c_io_error_detected,
2732         .slot_reset = atl1c_io_slot_reset,
2733         .resume = atl1c_io_resume,
2734 };
2735
2736 static struct pci_driver atl1c_driver = {
2737         .name     = atl1c_driver_name,
2738         .id_table = atl1c_pci_tbl,
2739         .probe    = atl1c_probe,
2740         .remove   = __devexit_p(atl1c_remove),
2741         /* Power Managment Hooks */
2742         .suspend  = atl1c_suspend,
2743         .resume   = atl1c_resume,
2744         .shutdown = atl1c_shutdown,
2745         .err_handler = &atl1c_err_handler
2746 };
2747
2748 /*
2749  * atl1c_init_module - Driver Registration Routine
2750  *
2751  * atl1c_init_module is the first routine called when the driver is
2752  * loaded. All it does is register with the PCI subsystem.
2753  */
2754 static int __init atl1c_init_module(void)
2755 {
2756         return pci_register_driver(&atl1c_driver);
2757 }
2758
2759 /*
2760  * atl1c_exit_module - Driver Exit Cleanup Routine
2761  *
2762  * atl1c_exit_module is called just before the driver is removed
2763  * from memory.
2764  */
2765 static void __exit atl1c_exit_module(void)
2766 {
2767         pci_unregister_driver(&atl1c_driver);
2768 }
2769
2770 module_init(atl1c_init_module);
2771 module_exit(atl1c_exit_module);