drivers/net/atl1e/atl1e_main.c

   1 /*
   2  * Copyright(c) 2007 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 "atl1e.h"
  23
  24 #define DRV_VERSION "1.0.0.7-NAPI"
  25
  26 char atl1e_driver_name[] = "ATL1E";
  27 char atl1e_driver_version[] = DRV_VERSION;
  28 #define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
  29 /*
  30  * atl1e_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 DEFINE_PCI_DEVICE_TABLE(atl1e_pci_tbl) = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  45
  46 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(DRV_VERSION);
  50
  51 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  52
  53 static const u16
  54 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  55 {
  56         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  57         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  58         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  59         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  60 };
  61
  62 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  63 {
  64         REG_RXF0_BASE_ADDR_HI,
  65         REG_RXF1_BASE_ADDR_HI,
  66         REG_RXF2_BASE_ADDR_HI,
  67         REG_RXF3_BASE_ADDR_HI
  68 };
  69
  70 static const u16
  71 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  72 {
  73         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  74         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  75         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  76         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  77 };
  78
  79 static const u16
  80 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  81 {
  82         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  83         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  84         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  85         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  86 };
  87
  88 static const u16 atl1e_pay_load_size[] = {
  89         128, 256, 512, 1024, 2048, 4096,
  90 };
  91
  92 /*
  93  * atl1e_irq_enable - Enable default interrupt generation settings
  94  * @adapter: board private structure
  95  */
  96 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  97 {
  98         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  99                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 100                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
 101                 AT_WRITE_FLUSH(&adapter->hw);
 102         }
 103 }
 104
 105 /*
 106  * atl1e_irq_disable - Mask off interrupt generation on the NIC
 107  * @adapter: board private structure
 108  */
 109 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
 110 {
 111         atomic_inc(&adapter->irq_sem);
 112         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 113         AT_WRITE_FLUSH(&adapter->hw);
 114         synchronize_irq(adapter->pdev->irq);
 115 }
 116
 117 /*
 118  * atl1e_irq_reset - reset interrupt confiure on the NIC
 119  * @adapter: board private structure
 120  */
 121 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 122 {
 123         atomic_set(&adapter->irq_sem, 0);
 124         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 125         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 126         AT_WRITE_FLUSH(&adapter->hw);
 127 }
 128
 129 /*
 130  * atl1e_phy_config - Timer Call-back
 131  * @data: pointer to netdev cast into an unsigned long
 132  */
 133 static void atl1e_phy_config(unsigned long data)
 134 {
 135         struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
 136         struct atl1e_hw *hw = &adapter->hw;
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&adapter->mdio_lock, flags);
 140         atl1e_restart_autoneg(hw);
 141         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 142 }
 143
 144 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 145 {
 146
 147         WARN_ON(in_interrupt());
 148         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 149                 msleep(1);
 150         atl1e_down(adapter);
 151         atl1e_up(adapter);
 152         clear_bit(__AT_RESETTING, &adapter->flags);
 153 }
 154
 155 static void atl1e_reset_task(struct work_struct *work)
 156 {
 157         struct atl1e_adapter *adapter;
 158         adapter = container_of(work, struct atl1e_adapter, reset_task);
 159
 160         atl1e_reinit_locked(adapter);
 161 }
 162
 163 static int atl1e_check_link(struct atl1e_adapter *adapter)
 164 {
 165         struct atl1e_hw *hw = &adapter->hw;
 166         struct net_device *netdev = adapter->netdev;
 167         int err = 0;
 168         u16 speed, duplex, phy_data;
 169
 170         /* MII_BMSR must read twice */
 171         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 172         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 173         if ((phy_data & BMSR_LSTATUS) == 0) {
 174                 /* link down */
 175                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 176                         u32 value;
 177                         /* disable rx */
 178                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 179                         value &= ~MAC_CTRL_RX_EN;
 180                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 181                         adapter->link_speed = SPEED_0;
 182                         netif_carrier_off(netdev);
 183                         netif_stop_queue(netdev);
 184                 }
 185         } else {
 186                 /* Link Up */
 187                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 188                 if (unlikely(err))
 189                         return err;
 190
 191                 /* link result is our setting */
 192                 if (adapter->link_speed != speed ||
 193                     adapter->link_duplex != duplex) {
 194                         adapter->link_speed  = speed;
 195                         adapter->link_duplex = duplex;
 196                         atl1e_setup_mac_ctrl(adapter);
 197                         netdev_info(netdev,
 198                                     "NIC Link is Up <%d Mbps %s Duplex>\n",
 199                                     adapter->link_speed,
 200                                     adapter->link_duplex == FULL_DUPLEX ?
 201                                     "Full" : "Half");
 202                 }
 203
 204                 if (!netif_carrier_ok(netdev)) {
 205                         /* Link down -> Up */
 206                         netif_carrier_on(netdev);
 207                         netif_wake_queue(netdev);
 208                 }
 209         }
 210         return 0;
 211 }
 212
 213 /*
 214  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 215  * @netdev: network interface device structure
 216  */
 217 static void atl1e_link_chg_task(struct work_struct *work)
 218 {
 219         struct atl1e_adapter *adapter;
 220         unsigned long flags;
 221
 222         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 223         spin_lock_irqsave(&adapter->mdio_lock, flags);
 224         atl1e_check_link(adapter);
 225         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 226 }
 227
 228 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 229 {
 230         struct net_device *netdev = adapter->netdev;
 231         u16 phy_data = 0;
 232         u16 link_up = 0;
 233
 234         spin_lock(&adapter->mdio_lock);
 235         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 236         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 237         spin_unlock(&adapter->mdio_lock);
 238         link_up = phy_data & BMSR_LSTATUS;
 239         /* notify upper layer link down ASAP */
 240         if (!link_up) {
 241                 if (netif_carrier_ok(netdev)) {
 242                         /* old link state: Up */
 243                         netdev_info(netdev, "NIC Link is Down\n");
 244                         adapter->link_speed = SPEED_0;
 245                         netif_stop_queue(netdev);
 246                 }
 247         }
 248         schedule_work(&adapter->link_chg_task);
 249 }
 250
 251 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 252 {
 253         del_timer_sync(&adapter->phy_config_timer);
 254 }
 255
 256 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 257 {
 258         cancel_work_sync(&adapter->reset_task);
 259         cancel_work_sync(&adapter->link_chg_task);
 260 }
 261
 262 /*
 263  * atl1e_tx_timeout - Respond to a Tx Hang
 264  * @netdev: network interface device structure
 265  */
 266 static void atl1e_tx_timeout(struct net_device *netdev)
 267 {
 268         struct atl1e_adapter *adapter = netdev_priv(netdev);
 269
 270         /* Do the reset outside of interrupt context */
 271         schedule_work(&adapter->reset_task);
 272 }
 273
 274 /*
 275  * atl1e_set_multi - Multicast and Promiscuous mode set
 276  * @netdev: network interface device structure
 277  *
 278  * The set_multi entry point is called whenever the multicast address
 279  * list or the network interface flags are updated.  This routine is
 280  * responsible for configuring the hardware for proper multicast,
 281  * promiscuous mode, and all-multi behavior.
 282  */
 283 static void atl1e_set_multi(struct net_device *netdev)
 284 {
 285         struct atl1e_adapter *adapter = netdev_priv(netdev);
 286         struct atl1e_hw *hw = &adapter->hw;
 287         struct netdev_hw_addr *ha;
 288         u32 mac_ctrl_data = 0;
 289         u32 hash_value;
 290
 291         /* Check for Promiscuous and All Multicast modes */
 292         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 293
 294         if (netdev->flags & IFF_PROMISC) {
 295                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 296         } else if (netdev->flags & IFF_ALLMULTI) {
 297                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 298                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 299         } else {
 300                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 301         }
 302
 303         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 304
 305         /* clear the old settings from the multicast hash table */
 306         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 307         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 308
 309         /* comoute mc addresses' hash value ,and put it into hash table */
 310         netdev_for_each_mc_addr(ha, netdev) {
 311                 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 312                 atl1e_hash_set(hw, hash_value);
 313         }
 314 }
 315
 316 static void atl1e_vlan_rx_register(struct net_device *netdev,
 317                                    struct vlan_group *grp)
 318 {
 319         struct atl1e_adapter *adapter = netdev_priv(netdev);
 320         u32 mac_ctrl_data = 0;
 321
 322         netdev_dbg(adapter->netdev, "%s\n", __func__);
 323
 324         atl1e_irq_disable(adapter);
 325
 326         adapter->vlgrp = grp;
 327         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 328
 329         if (grp) {
 330                 /* enable VLAN tag insert/strip */
 331                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 332         } else {
 333                 /* disable VLAN tag insert/strip */
 334                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 335         }
 336
 337         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 338         atl1e_irq_enable(adapter);
 339 }
 340
 341 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 342 {
 343         netdev_dbg(adapter->netdev, "%s\n", __func__);
 344         atl1e_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 345 }
 346 /*
 347  * atl1e_set_mac - Change the Ethernet Address of the NIC
 348  * @netdev: network interface device structure
 349  * @p: pointer to an address structure
 350  *
 351  * Returns 0 on success, negative on failure
 352  */
 353 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 354 {
 355         struct atl1e_adapter *adapter = netdev_priv(netdev);
 356         struct sockaddr *addr = p;
 357
 358         if (!is_valid_ether_addr(addr->sa_data))
 359                 return -EADDRNOTAVAIL;
 360
 361         if (netif_running(netdev))
 362                 return -EBUSY;
 363
 364         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 365         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 366
 367         atl1e_hw_set_mac_addr(&adapter->hw);
 368
 369         return 0;
 370 }
 371
 372 /*
 373  * atl1e_change_mtu - Change the Maximum Transfer Unit
 374  * @netdev: network interface device structure
 375  * @new_mtu: new value for maximum frame size
 376  *
 377  * Returns 0 on success, negative on failure
 378  */
 379 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 380 {
 381         struct atl1e_adapter *adapter = netdev_priv(netdev);
 382         int old_mtu   = netdev->mtu;
 383         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 384
 385         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 386                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 387                 netdev_warn(adapter->netdev, "invalid MTU setting\n");
 388                 return -EINVAL;
 389         }
 390         /* set MTU */
 391         if (old_mtu != new_mtu && netif_running(netdev)) {
 392                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 393                         msleep(1);
 394                 netdev->mtu = new_mtu;
 395                 adapter->hw.max_frame_size = new_mtu;
 396                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 397                 atl1e_down(adapter);
 398                 atl1e_up(adapter);
 399                 clear_bit(__AT_RESETTING, &adapter->flags);
 400         }
 401         return 0;
 402 }
 403
 404 /*
 405  *  caller should hold mdio_lock
 406  */
 407 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 408 {
 409         struct atl1e_adapter *adapter = netdev_priv(netdev);
 410         u16 result;
 411
 412         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 413         return result;
 414 }
 415
 416 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 417                              int reg_num, int val)
 418 {
 419         struct atl1e_adapter *adapter = netdev_priv(netdev);
 420
 421         atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 422 }
 423
 424 /*
 425  * atl1e_mii_ioctl -
 426  * @netdev:
 427  * @ifreq:
 428  * @cmd:
 429  */
 430 static int atl1e_mii_ioctl(struct net_device *netdev,
 431                            struct ifreq *ifr, int cmd)
 432 {
 433         struct atl1e_adapter *adapter = netdev_priv(netdev);
 434         struct mii_ioctl_data *data = if_mii(ifr);
 435         unsigned long flags;
 436         int retval = 0;
 437
 438         if (!netif_running(netdev))
 439                 return -EINVAL;
 440
 441         spin_lock_irqsave(&adapter->mdio_lock, flags);
 442         switch (cmd) {
 443         case SIOCGMIIPHY:
 444                 data->phy_id = 0;
 445                 break;
 446
 447         case SIOCGMIIREG:
 448                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 449                                     &data->val_out)) {
 450                         retval = -EIO;
 451                         goto out;
 452                 }
 453                 break;
 454
 455         case SIOCSMIIREG:
 456                 if (data->reg_num & ~(0x1F)) {
 457                         retval = -EFAULT;
 458                         goto out;
 459                 }
 460
 461                 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 462                            data->reg_num, data->val_in);
 463                 if (atl1e_write_phy_reg(&adapter->hw,
 464                                      data->reg_num, data->val_in)) {
 465                         retval = -EIO;
 466                         goto out;
 467                 }
 468                 break;
 469
 470         default:
 471                 retval = -EOPNOTSUPP;
 472                 break;
 473         }
 474 out:
 475         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 476         return retval;
 477
 478 }
 479
 480 /*
 481  * atl1e_ioctl -
 482  * @netdev:
 483  * @ifreq:
 484  * @cmd:
 485  */
 486 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 487 {
 488         switch (cmd) {
 489         case SIOCGMIIPHY:
 490         case SIOCGMIIREG:
 491         case SIOCSMIIREG:
 492                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 493         default:
 494                 return -EOPNOTSUPP;
 495         }
 496 }
 497
 498 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 499 {
 500         u16 cmd;
 501
 502         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 503         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 504         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 505         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 506
 507         /*
 508          * some motherboards BIOS(PXE/EFI) driver may set PME
 509          * while they transfer control to OS (Windows/Linux)
 510          * so we should clear this bit before NIC work normally
 511          */
 512         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 513         msleep(1);
 514 }
 515
 516 /*
 517  * atl1e_alloc_queues - Allocate memory for all rings
 518  * @adapter: board private structure to initialize
 519  *
 520  */
 521 static int __devinit atl1e_alloc_queues(struct atl1e_adapter *adapter)
 522 {
 523         return 0;
 524 }
 525
 526 /*
 527  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 528  * @adapter: board private structure to initialize
 529  *
 530  * atl1e_sw_init initializes the Adapter private data structure.
 531  * Fields are initialized based on PCI device information and
 532  * OS network device settings (MTU size).
 533  */
 534 static int __devinit atl1e_sw_init(struct atl1e_adapter *adapter)
 535 {
 536         struct atl1e_hw *hw   = &adapter->hw;
 537         struct pci_dev  *pdev = adapter->pdev;
 538         u32 phy_status_data = 0;
 539
 540         adapter->wol = 0;
 541         adapter->link_speed = SPEED_0;   /* hardware init */
 542         adapter->link_duplex = FULL_DUPLEX;
 543         adapter->num_rx_queues = 1;
 544
 545         /* PCI config space info */
 546         hw->vendor_id = pdev->vendor;
 547         hw->device_id = pdev->device;
 548         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 549         hw->subsystem_id = pdev->subsystem_device;
 550         hw->revision_id  = pdev->revision;
 551
 552         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 553
 554         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 555         /* nic type */
 556         if (hw->revision_id >= 0xF0) {
 557                 hw->nic_type = athr_l2e_revB;
 558         } else {
 559                 if (phy_status_data & PHY_STATUS_100M)
 560                         hw->nic_type = athr_l1e;
 561                 else
 562                         hw->nic_type = athr_l2e_revA;
 563         }
 564
 565         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 566
 567         if (phy_status_data & PHY_STATUS_EMI_CA)
 568                 hw->emi_ca = true;
 569         else
 570                 hw->emi_ca = false;
 571
 572         hw->phy_configured = false;
 573         hw->preamble_len = 7;
 574         hw->max_frame_size = adapter->netdev->mtu;
 575         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 576                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 577
 578         hw->rrs_type = atl1e_rrs_disable;
 579         hw->indirect_tab = 0;
 580         hw->base_cpu = 0;
 581
 582         /* need confirm */
 583
 584         hw->ict = 50000;                 /* 100ms */
 585         hw->smb_timer = 200000;          /* 200ms  */
 586         hw->tpd_burst = 5;
 587         hw->rrd_thresh = 1;
 588         hw->tpd_thresh = adapter->tx_ring.count / 2;
 589         hw->rx_count_down = 4;  /* 2us resolution */
 590         hw->tx_count_down = hw->imt * 4 / 3;
 591         hw->dmar_block = atl1e_dma_req_1024;
 592         hw->dmaw_block = atl1e_dma_req_1024;
 593         hw->dmar_dly_cnt = 15;
 594         hw->dmaw_dly_cnt = 4;
 595
 596         if (atl1e_alloc_queues(adapter)) {
 597                 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 598                 return -ENOMEM;
 599         }
 600
 601         atomic_set(&adapter->irq_sem, 1);
 602         spin_lock_init(&adapter->mdio_lock);
 603         spin_lock_init(&adapter->tx_lock);
 604
 605         set_bit(__AT_DOWN, &adapter->flags);
 606
 607         return 0;
 608 }
 609
 610 /*
 611  * atl1e_clean_tx_ring - Free Tx-skb
 612  * @adapter: board private structure
 613  */
 614 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 615 {
 616         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
 617                                 &adapter->tx_ring;
 618         struct atl1e_tx_buffer *tx_buffer = NULL;
 619         struct pci_dev *pdev = adapter->pdev;
 620         u16 index, ring_count;
 621
 622         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 623                 return;
 624
 625         ring_count = tx_ring->count;
 626         /* first unmmap dma */
 627         for (index = 0; index < ring_count; index++) {
 628                 tx_buffer = &tx_ring->tx_buffer[index];
 629                 if (tx_buffer->dma) {
 630                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 631                                 pci_unmap_single(pdev, tx_buffer->dma,
 632                                         tx_buffer->length, PCI_DMA_TODEVICE);
 633                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 634                                 pci_unmap_page(pdev, tx_buffer->dma,
 635                                         tx_buffer->length, PCI_DMA_TODEVICE);
 636                         tx_buffer->dma = 0;
 637                 }
 638         }
 639         /* second free skb */
 640         for (index = 0; index < ring_count; index++) {
 641                 tx_buffer = &tx_ring->tx_buffer[index];
 642                 if (tx_buffer->skb) {
 643                         dev_kfree_skb_any(tx_buffer->skb);
 644                         tx_buffer->skb = NULL;
 645                 }
 646         }
 647         /* Zero out Tx-buffers */
 648         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 649                                 ring_count);
 650         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 651                                 ring_count);
 652 }
 653
 654 /*
 655  * atl1e_clean_rx_ring - Free rx-reservation skbs
 656  * @adapter: board private structure
 657  */
 658 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 659 {
 660         struct atl1e_rx_ring *rx_ring =
 661                 (struct atl1e_rx_ring *)&adapter->rx_ring;
 662         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 663         u16 i, j;
 664
 665
 666         if (adapter->ring_vir_addr == NULL)
 667                 return;
 668         /* Zero out the descriptor ring */
 669         for (i = 0; i < adapter->num_rx_queues; i++) {
 670                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 671                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 672                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 673                                                 rx_ring->real_page_size);
 674                         }
 675                 }
 676         }
 677 }
 678
 679 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 680 {
 681         *ring_size = ((u32)(adapter->tx_ring.count *
 682                      sizeof(struct atl1e_tpd_desc) + 7
 683                         /* tx ring, qword align */
 684                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 685                         adapter->num_rx_queues + 31
 686                         /* rx ring,  32 bytes align */
 687                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 688                         sizeof(u32) + 3));
 689                         /* tx, rx cmd, dword align   */
 690 }
 691
 692 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 693 {
 694         struct atl1e_rx_ring *rx_ring = NULL;
 695
 696         rx_ring = &adapter->rx_ring;
 697
 698         rx_ring->real_page_size = adapter->rx_ring.page_size
 699                                  + adapter->hw.max_frame_size
 700                                  + ETH_HLEN + VLAN_HLEN
 701                                  + ETH_FCS_LEN;
 702         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 703         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 704
 705         adapter->ring_vir_addr = NULL;
 706         adapter->rx_ring.desc = NULL;
 707         rwlock_init(&adapter->tx_ring.tx_lock);
 708 }
 709
 710 /*
 711  * Read / Write Ptr Initialize:
 712  */
 713 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 714 {
 715         struct atl1e_tx_ring *tx_ring = NULL;
 716         struct atl1e_rx_ring *rx_ring = NULL;
 717         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 718         int i, j;
 719
 720         tx_ring = &adapter->tx_ring;
 721         rx_ring = &adapter->rx_ring;
 722         rx_page_desc = rx_ring->rx_page_desc;
 723
 724         tx_ring->next_to_use = 0;
 725         atomic_set(&tx_ring->next_to_clean, 0);
 726
 727         for (i = 0; i < adapter->num_rx_queues; i++) {
 728                 rx_page_desc[i].rx_using  = 0;
 729                 rx_page_desc[i].rx_nxseq = 0;
 730                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 731                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 732                         rx_page_desc[i].rx_page[j].read_offset = 0;
 733                 }
 734         }
 735 }
 736
 737 /*
 738  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 739  * @adapter: board private structure
 740  *
 741  * Free all transmit software resources
 742  */
 743 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 744 {
 745         struct pci_dev *pdev = adapter->pdev;
 746
 747         atl1e_clean_tx_ring(adapter);
 748         atl1e_clean_rx_ring(adapter);
 749
 750         if (adapter->ring_vir_addr) {
 751                 pci_free_consistent(pdev, adapter->ring_size,
 752                                 adapter->ring_vir_addr, adapter->ring_dma);
 753                 adapter->ring_vir_addr = NULL;
 754         }
 755
 756         if (adapter->tx_ring.tx_buffer) {
 757                 kfree(adapter->tx_ring.tx_buffer);
 758                 adapter->tx_ring.tx_buffer = NULL;
 759         }
 760 }
 761
 762 /*
 763  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 764  * @adapter: board private structure
 765  *
 766  * Return 0 on success, negative on failure
 767  */
 768 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 769 {
 770         struct pci_dev *pdev = adapter->pdev;
 771         struct atl1e_tx_ring *tx_ring;
 772         struct atl1e_rx_ring *rx_ring;
 773         struct atl1e_rx_page_desc  *rx_page_desc;
 774         int size, i, j;
 775         u32 offset = 0;
 776         int err = 0;
 777
 778         if (adapter->ring_vir_addr != NULL)
 779                 return 0; /* alloced already */
 780
 781         tx_ring = &adapter->tx_ring;
 782         rx_ring = &adapter->rx_ring;
 783
 784         /* real ring DMA buffer */
 785
 786         size = adapter->ring_size;
 787         adapter->ring_vir_addr = pci_alloc_consistent(pdev,
 788                         adapter->ring_size, &adapter->ring_dma);
 789
 790         if (adapter->ring_vir_addr == NULL) {
 791                 netdev_err(adapter->netdev,
 792                            "pci_alloc_consistent failed, size = D%d\n", size);
 793                 return -ENOMEM;
 794         }
 795
 796         memset(adapter->ring_vir_addr, 0, adapter->ring_size);
 797
 798         rx_page_desc = rx_ring->rx_page_desc;
 799
 800         /* Init TPD Ring */
 801         tx_ring->dma = roundup(adapter->ring_dma, 8);
 802         offset = tx_ring->dma - adapter->ring_dma;
 803         tx_ring->desc = (struct atl1e_tpd_desc *)
 804                         (adapter->ring_vir_addr + offset);
 805         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 806         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 807         if (tx_ring->tx_buffer == NULL) {
 808                 netdev_err(adapter->netdev, "kzalloc failed, size = D%d\n",
 809                            size);
 810                 err = -ENOMEM;
 811                 goto failed;
 812         }
 813
 814         /* Init RXF-Pages */
 815         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 816         offset = roundup(offset, 32);
 817
 818         for (i = 0; i < adapter->num_rx_queues; i++) {
 819                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 820                         rx_page_desc[i].rx_page[j].dma =
 821                                 adapter->ring_dma + offset;
 822                         rx_page_desc[i].rx_page[j].addr =
 823                                 adapter->ring_vir_addr + offset;
 824                         offset += rx_ring->real_page_size;
 825                 }
 826         }
 827
 828         /* Init CMB dma address */
 829         tx_ring->cmb_dma = adapter->ring_dma + offset;
 830         tx_ring->cmb     = (u32 *)(adapter->ring_vir_addr + offset);
 831         offset += sizeof(u32);
 832
 833         for (i = 0; i < adapter->num_rx_queues; i++) {
 834                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 835                         rx_page_desc[i].rx_page[j].write_offset_dma =
 836                                 adapter->ring_dma + offset;
 837                         rx_page_desc[i].rx_page[j].write_offset_addr =
 838                                 adapter->ring_vir_addr + offset;
 839                         offset += sizeof(u32);
 840                 }
 841         }
 842
 843         if (unlikely(offset > adapter->ring_size)) {
 844                 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 845                            offset, adapter->ring_size);
 846                 err = -1;
 847                 goto failed;
 848         }
 849
 850         return 0;
 851 failed:
 852         if (adapter->ring_vir_addr != NULL) {
 853                 pci_free_consistent(pdev, adapter->ring_size,
 854                                 adapter->ring_vir_addr, adapter->ring_dma);
 855                 adapter->ring_vir_addr = NULL;
 856         }
 857         return err;
 858 }
 859
 860 static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter)
 861 {
 862
 863         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 864         struct atl1e_rx_ring *rx_ring =
 865                         (struct atl1e_rx_ring *)&adapter->rx_ring;
 866         struct atl1e_tx_ring *tx_ring =
 867                         (struct atl1e_tx_ring *)&adapter->tx_ring;
 868         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 869         int i, j;
 870
 871         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 872                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 873         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 874                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 875         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 876         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 877                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 878
 879         rx_page_desc = rx_ring->rx_page_desc;
 880         /* RXF Page Physical address / Page Length */
 881         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 882                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 883                                  (u32)((adapter->ring_dma &
 884                                  AT_DMA_HI_ADDR_MASK) >> 32));
 885                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 886                         u32 page_phy_addr;
 887                         u32 offset_phy_addr;
 888
 889                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 890                         offset_phy_addr =
 891                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 892
 893                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 894                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 895                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 896                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 897                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 898                 }
 899         }
 900         /* Page Length */
 901         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 902         /* Load all of base address above */
 903         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 904 }
 905
 906 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 907 {
 908         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 909         u32 dev_ctrl_data = 0;
 910         u32 max_pay_load = 0;
 911         u32 jumbo_thresh = 0;
 912         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 913
 914         /* configure TXQ param */
 915         if (hw->nic_type != athr_l2e_revB) {
 916                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 917                 if (hw->max_frame_size <= 1500) {
 918                         jumbo_thresh = hw->max_frame_size + extra_size;
 919                 } else if (hw->max_frame_size < 6*1024) {
 920                         jumbo_thresh =
 921                                 (hw->max_frame_size + extra_size) * 2 / 3;
 922                 } else {
 923                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 924                 }
 925                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 926         }
 927
 928         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 929
 930         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 931                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 932
 933         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 934
 935         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 936                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 937         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 938
 939         if (hw->nic_type != athr_l2e_revB)
 940                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 941                               atl1e_pay_load_size[hw->dmar_block]);
 942         /* enable TXQ */
 943         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 944                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 945                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 946                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 947 }
 948
 949 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 950 {
 951         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 952         u32 rxf_len  = 0;
 953         u32 rxf_low  = 0;
 954         u32 rxf_high = 0;
 955         u32 rxf_thresh_data = 0;
 956         u32 rxq_ctrl_data = 0;
 957
 958         if (hw->nic_type != athr_l2e_revB) {
 959                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 960                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 961                               RXQ_JMBOSZ_TH_SHIFT |
 962                               (1 & RXQ_JMBO_LKAH_MASK) <<
 963                               RXQ_JMBO_LKAH_SHIFT));
 964
 965                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 966                 rxf_high = rxf_len * 4 / 5;
 967                 rxf_low  = rxf_len / 5;
 968                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 969                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 970                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 971                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 972
 973                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 974         }
 975
 976         /* RRS */
 977         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
 978         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
 979
 980         if (hw->rrs_type & atl1e_rrs_ipv4)
 981                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
 982
 983         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
 984                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
 985
 986         if (hw->rrs_type & atl1e_rrs_ipv6)
 987                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
 988
 989         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
 990                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
 991
 992         if (hw->rrs_type != atl1e_rrs_disable)
 993                 rxq_ctrl_data |=
 994                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
 995
 996         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
 997                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
 998
 999         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1000 }
1001
1002 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1003 {
1004         struct atl1e_hw *hw = &adapter->hw;
1005         u32 dma_ctrl_data = 0;
1006
1007         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1008         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1009                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1010         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1011                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1012         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1013         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1014                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1015         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1016                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1017
1018         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1019 }
1020
1021 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1022 {
1023         u32 value;
1024         struct atl1e_hw *hw = &adapter->hw;
1025         struct net_device *netdev = adapter->netdev;
1026
1027         /* Config MAC CTRL Register */
1028         value = MAC_CTRL_TX_EN |
1029                 MAC_CTRL_RX_EN ;
1030
1031         if (FULL_DUPLEX == adapter->link_duplex)
1032                 value |= MAC_CTRL_DUPLX;
1033
1034         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1035                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1036                           MAC_CTRL_SPEED_SHIFT);
1037         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1038
1039         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1040         value |= (((u32)adapter->hw.preamble_len &
1041                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1042
1043         if (adapter->vlgrp)
1044                 value |= MAC_CTRL_RMV_VLAN;
1045
1046         value |= MAC_CTRL_BC_EN;
1047         if (netdev->flags & IFF_PROMISC)
1048                 value |= MAC_CTRL_PROMIS_EN;
1049         if (netdev->flags & IFF_ALLMULTI)
1050                 value |= MAC_CTRL_MC_ALL_EN;
1051
1052         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1053 }
1054
1055 /*
1056  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1057  * @adapter: board private structure
1058  *
1059  * Configure the Tx /Rx unit of the MAC after a reset.
1060  */
1061 static int atl1e_configure(struct atl1e_adapter *adapter)
1062 {
1063         struct atl1e_hw *hw = &adapter->hw;
1064
1065         u32 intr_status_data = 0;
1066
1067         /* clear interrupt status */
1068         AT_WRITE_REG(hw, REG_ISR, ~0);
1069
1070         /* 1. set MAC Address */
1071         atl1e_hw_set_mac_addr(hw);
1072
1073         /* 2. Init the Multicast HASH table done by set_muti */
1074
1075         /* 3. Clear any WOL status */
1076         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1077
1078         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1079          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1080          *    High 32bits memory */
1081         atl1e_configure_des_ring(adapter);
1082
1083         /* 5. set Interrupt Moderator Timer */
1084         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1085         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1086         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1087                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1088
1089         /* 6. rx/tx threshold to trig interrupt */
1090         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1091         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1092         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1093         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1094
1095         /* 7. set Interrupt Clear Timer */
1096         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1097
1098         /* 8. set MTU */
1099         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1100                         VLAN_HLEN + ETH_FCS_LEN);
1101
1102         /* 9. config TXQ early tx threshold */
1103         atl1e_configure_tx(adapter);
1104
1105         /* 10. config RXQ */
1106         atl1e_configure_rx(adapter);
1107
1108         /* 11. config  DMA Engine */
1109         atl1e_configure_dma(adapter);
1110
1111         /* 12. smb timer to trig interrupt */
1112         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1113
1114         intr_status_data = AT_READ_REG(hw, REG_ISR);
1115         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1116                 netdev_err(adapter->netdev,
1117                            "atl1e_configure failed, PCIE phy link down\n");
1118                 return -1;
1119         }
1120
1121         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1122         return 0;
1123 }
1124
1125 /*
1126  * atl1e_get_stats - Get System Network Statistics
1127  * @netdev: network interface device structure
1128  *
1129  * Returns the address of the device statistics structure.
1130  * The statistics are actually updated from the timer callback.
1131  */
1132 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1133 {
1134         struct atl1e_adapter *adapter = netdev_priv(netdev);
1135         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1136         struct net_device_stats *net_stats = &netdev->stats;
1137
1138         net_stats->rx_packets = hw_stats->rx_ok;
1139         net_stats->tx_packets = hw_stats->tx_ok;
1140         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1141         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1142         net_stats->multicast  = hw_stats->rx_mcast;
1143         net_stats->collisions = hw_stats->tx_1_col +
1144                                 hw_stats->tx_2_col * 2 +
1145                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1146
1147         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1148                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1149                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1150         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1151         net_stats->rx_length_errors = hw_stats->rx_len_err;
1152         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1153         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1154         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1155
1156         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1157
1158         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1159                                hw_stats->tx_underrun + hw_stats->tx_trunc;
1160         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1161         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1162         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1163
1164         return net_stats;
1165 }
1166
1167 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1168 {
1169         u16 hw_reg_addr = 0;
1170         unsigned long *stats_item = NULL;
1171
1172         /* update rx status */
1173         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1174         stats_item  = &adapter->hw_stats.rx_ok;
1175         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1176                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1177                 stats_item++;
1178                 hw_reg_addr += 4;
1179         }
1180         /* update tx status */
1181         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1182         stats_item  = &adapter->hw_stats.tx_ok;
1183         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1184                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1185                 stats_item++;
1186                 hw_reg_addr += 4;
1187         }
1188 }
1189
1190 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1191 {
1192         u16 phy_data;
1193
1194         spin_lock(&adapter->mdio_lock);
1195         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1196         spin_unlock(&adapter->mdio_lock);
1197 }
1198
1199 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1200 {
1201         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
1202                                         &adapter->tx_ring;
1203         struct atl1e_tx_buffer *tx_buffer = NULL;
1204         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1205         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1206
1207         while (next_to_clean != hw_next_to_clean) {
1208                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1209                 if (tx_buffer->dma) {
1210                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1211                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1212                                         tx_buffer->length, PCI_DMA_TODEVICE);
1213                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1214                                 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1215                                         tx_buffer->length, PCI_DMA_TODEVICE);
1216                         tx_buffer->dma = 0;
1217                 }
1218
1219                 if (tx_buffer->skb) {
1220                         dev_kfree_skb_irq(tx_buffer->skb);
1221                         tx_buffer->skb = NULL;
1222                 }
1223
1224                 if (++next_to_clean == tx_ring->count)
1225                         next_to_clean = 0;
1226         }
1227
1228         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1229
1230         if (netif_queue_stopped(adapter->netdev) &&
1231                         netif_carrier_ok(adapter->netdev)) {
1232                 netif_wake_queue(adapter->netdev);
1233         }
1234
1235         return true;
1236 }
1237
1238 /*
1239  * atl1e_intr - Interrupt Handler
1240  * @irq: interrupt number
1241  * @data: pointer to a network interface device structure
1242  * @pt_regs: CPU registers structure
1243  */
1244 static irqreturn_t atl1e_intr(int irq, void *data)
1245 {
1246         struct net_device *netdev  = data;
1247         struct atl1e_adapter *adapter = netdev_priv(netdev);
1248         struct atl1e_hw *hw = &adapter->hw;
1249         int max_ints = AT_MAX_INT_WORK;
1250         int handled = IRQ_NONE;
1251         u32 status;
1252
1253         do {
1254                 status = AT_READ_REG(hw, REG_ISR);
1255                 if ((status & IMR_NORMAL_MASK) == 0 ||
1256                                 (status & ISR_DIS_INT) != 0) {
1257                         if (max_ints != AT_MAX_INT_WORK)
1258                                 handled = IRQ_HANDLED;
1259                         break;
1260                 }
1261                 /* link event */
1262                 if (status & ISR_GPHY)
1263                         atl1e_clear_phy_int(adapter);
1264                 /* Ack ISR */
1265                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1266
1267                 handled = IRQ_HANDLED;
1268                 /* check if PCIE PHY Link down */
1269                 if (status & ISR_PHY_LINKDOWN) {
1270                         netdev_err(adapter->netdev,
1271                                    "pcie phy linkdown %x\n", status);
1272                         if (netif_running(adapter->netdev)) {
1273                                 /* reset MAC */
1274                                 atl1e_irq_reset(adapter);
1275                                 schedule_work(&adapter->reset_task);
1276                                 break;
1277                         }
1278                 }
1279
1280                 /* check if DMA read/write error */
1281                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1282                         netdev_err(adapter->netdev,
1283                                    "PCIE DMA RW error (status = 0x%x)\n",
1284                                    status);
1285                         atl1e_irq_reset(adapter);
1286                         schedule_work(&adapter->reset_task);
1287                         break;
1288                 }
1289
1290                 if (status & ISR_SMB)
1291                         atl1e_update_hw_stats(adapter);
1292
1293                 /* link event */
1294                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1295                         netdev->stats.tx_carrier_errors++;
1296                         atl1e_link_chg_event(adapter);
1297                         break;
1298                 }
1299
1300                 /* transmit event */
1301                 if (status & ISR_TX_EVENT)
1302                         atl1e_clean_tx_irq(adapter);
1303
1304                 if (status & ISR_RX_EVENT) {
1305                         /*
1306                          * disable rx interrupts, without
1307                          * the synchronize_irq bit
1308                          */
1309                         AT_WRITE_REG(hw, REG_IMR,
1310                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1311                         AT_WRITE_FLUSH(hw);
1312                         if (likely(napi_schedule_prep(
1313                                    &adapter->napi)))
1314                                 __napi_schedule(&adapter->napi);
1315                 }
1316         } while (--max_ints > 0);
1317         /* re-enable Interrupt*/
1318         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1319
1320         return handled;
1321 }
1322
1323 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1324                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1325 {
1326         u8 *packet = (u8 *)(prrs + 1);
1327         struct iphdr *iph;
1328         u16 head_len = ETH_HLEN;
1329         u16 pkt_flags;
1330         u16 err_flags;
1331
1332         skb_checksum_none_assert(skb);
1333         pkt_flags = prrs->pkt_flag;
1334         err_flags = prrs->err_flag;
1335         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1336                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1337                 if (pkt_flags & RRS_IS_IPV4) {
1338                         if (pkt_flags & RRS_IS_802_3)
1339                                 head_len += 8;
1340                         iph = (struct iphdr *) (packet + head_len);
1341                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1342                                 goto hw_xsum;
1343                 }
1344                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1345                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1346                         return;
1347                 }
1348         }
1349
1350 hw_xsum :
1351         return;
1352 }
1353
1354 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1355                                                u8 que)
1356 {
1357         struct atl1e_rx_page_desc *rx_page_desc =
1358                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1359         u8 rx_using = rx_page_desc[que].rx_using;
1360
1361         return (struct atl1e_rx_page *)&(rx_page_desc[que].rx_page[rx_using]);
1362 }
1363
1364 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1365                    int *work_done, int work_to_do)
1366 {
1367         struct net_device *netdev  = adapter->netdev;
1368         struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *)
1369                                          &adapter->rx_ring;
1370         struct atl1e_rx_page_desc *rx_page_desc =
1371                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1372         struct sk_buff *skb = NULL;
1373         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1374         u32 packet_size, write_offset;
1375         struct atl1e_recv_ret_status *prrs;
1376
1377         write_offset = *(rx_page->write_offset_addr);
1378         if (likely(rx_page->read_offset < write_offset)) {
1379                 do {
1380                         if (*work_done >= work_to_do)
1381                                 break;
1382                         (*work_done)++;
1383                         /* get new packet's  rrs */
1384                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1385                                                  rx_page->read_offset);
1386                         /* check sequence number */
1387                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1388                                 netdev_err(netdev,
1389                                            "rx sequence number error (rx=%d) (expect=%d)\n",
1390                                            prrs->seq_num,
1391                                            rx_page_desc[que].rx_nxseq);
1392                                 rx_page_desc[que].rx_nxseq++;
1393                                 /* just for debug use */
1394                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1395                                              (((u32)prrs->seq_num) << 16) |
1396                                              rx_page_desc[que].rx_nxseq);
1397                                 goto fatal_err;
1398                         }
1399                         rx_page_desc[que].rx_nxseq++;
1400
1401                         /* error packet */
1402                         if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
1403                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1404                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1405                                         RRS_ERR_TRUNC)) {
1406                                 /* hardware error, discard this packet*/
1407                                         netdev_err(netdev,
1408                                                    "rx packet desc error %x\n",
1409                                                    *((u32 *)prrs + 1));
1410                                         goto skip_pkt;
1411                                 }
1412                         }
1413
1414                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1415                                         RRS_PKT_SIZE_MASK) - 4; /* CRC */
1416                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1417                         if (skb == NULL) {
1418                                 netdev_warn(netdev,
1419                                             "Memory squeeze, deferring packet\n");
1420                                 goto skip_pkt;
1421                         }
1422                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1423                         skb_put(skb, packet_size);
1424                         skb->protocol = eth_type_trans(skb, netdev);
1425                         atl1e_rx_checksum(adapter, skb, prrs);
1426
1427                         if (unlikely(adapter->vlgrp &&
1428                                 (prrs->pkt_flag & RRS_IS_VLAN_TAG))) {
1429                                 u16 vlan_tag = (prrs->vtag >> 4) |
1430                                                ((prrs->vtag & 7) << 13) |
1431                                                ((prrs->vtag & 8) << 9);
1432                                 netdev_dbg(netdev,
1433                                            "RXD VLAN TAG<RRD>=0x%04x\n",
1434                                            prrs->vtag);
1435                                 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
1436                                                          vlan_tag);
1437                         } else {
1438                                 netif_receive_skb(skb);
1439                         }
1440
1441 skip_pkt:
1442         /* skip current packet whether it's ok or not. */
1443                         rx_page->read_offset +=
1444                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1445                                 RRS_PKT_SIZE_MASK) +
1446                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1447                                                 0xFFFFFFE0);
1448
1449                         if (rx_page->read_offset >= rx_ring->page_size) {
1450                                 /* mark this page clean */
1451                                 u16 reg_addr;
1452                                 u8  rx_using;
1453
1454                                 rx_page->read_offset =
1455                                         *(rx_page->write_offset_addr) = 0;
1456                                 rx_using = rx_page_desc[que].rx_using;
1457                                 reg_addr =
1458                                         atl1e_rx_page_vld_regs[que][rx_using];
1459                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1460                                 rx_page_desc[que].rx_using ^= 1;
1461                                 rx_page = atl1e_get_rx_page(adapter, que);
1462                         }
1463                         write_offset = *(rx_page->write_offset_addr);
1464                 } while (rx_page->read_offset < write_offset);
1465         }
1466
1467         return;
1468
1469 fatal_err:
1470         if (!test_bit(__AT_DOWN, &adapter->flags))
1471                 schedule_work(&adapter->reset_task);
1472 }
1473
1474 /*
1475  * atl1e_clean - NAPI Rx polling callback
1476  * @adapter: board private structure
1477  */
1478 static int atl1e_clean(struct napi_struct *napi, int budget)
1479 {
1480         struct atl1e_adapter *adapter =
1481                         container_of(napi, struct atl1e_adapter, napi);
1482         u32 imr_data;
1483         int work_done = 0;
1484
1485         /* Keep link state information with original netdev */
1486         if (!netif_carrier_ok(adapter->netdev))
1487                 goto quit_polling;
1488
1489         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1490
1491         /* If no Tx and not enough Rx work done, exit the polling mode */
1492         if (work_done < budget) {
1493 quit_polling:
1494                 napi_complete(napi);
1495                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1496                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1497                 /* test debug */
1498                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1499                         atomic_dec(&adapter->irq_sem);
1500                         netdev_err(adapter->netdev,
1501                                    "atl1e_clean is called when AT_DOWN\n");
1502                 }
1503                 /* reenable RX intr */
1504                 /*atl1e_irq_enable(adapter); */
1505
1506         }
1507         return work_done;
1508 }
1509
1510 #ifdef CONFIG_NET_POLL_CONTROLLER
1511
1512 /*
1513  * Polling 'interrupt' - used by things like netconsole to send skbs
1514  * without having to re-enable interrupts. It's not called while
1515  * the interrupt routine is executing.
1516  */
1517 static void atl1e_netpoll(struct net_device *netdev)
1518 {
1519         struct atl1e_adapter *adapter = netdev_priv(netdev);
1520
1521         disable_irq(adapter->pdev->irq);
1522         atl1e_intr(adapter->pdev->irq, netdev);
1523         enable_irq(adapter->pdev->irq);
1524 }
1525 #endif
1526
1527 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1528 {
1529         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1530         u16 next_to_use = 0;
1531         u16 next_to_clean = 0;
1532
1533         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1534         next_to_use   = tx_ring->next_to_use;
1535
1536         return (u16)(next_to_clean > next_to_use) ?
1537                 (next_to_clean - next_to_use - 1) :
1538                 (tx_ring->count + next_to_clean - next_to_use - 1);
1539 }
1540
1541 /*
1542  * get next usable tpd
1543  * Note: should call atl1e_tdp_avail to make sure
1544  * there is enough tpd to use
1545  */
1546 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1547 {
1548         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1549         u16 next_to_use = 0;
1550
1551         next_to_use = tx_ring->next_to_use;
1552         if (++tx_ring->next_to_use == tx_ring->count)
1553                 tx_ring->next_to_use = 0;
1554
1555         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1556         return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use];
1557 }
1558
1559 static struct atl1e_tx_buffer *
1560 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1561 {
1562         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1563
1564         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1565 }
1566
1567 /* Calculate the transmit packet descript needed*/
1568 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1569 {
1570         int i = 0;
1571         u16 tpd_req = 1;
1572         u16 fg_size = 0;
1573         u16 proto_hdr_len = 0;
1574
1575         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1576                 fg_size = skb_shinfo(skb)->frags[i].size;
1577                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1578         }
1579
1580         if (skb_is_gso(skb)) {
1581                 if (skb->protocol == htons(ETH_P_IP) ||
1582                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1583                         proto_hdr_len = skb_transport_offset(skb) +
1584                                         tcp_hdrlen(skb);
1585                         if (proto_hdr_len < skb_headlen(skb)) {
1586                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1587                                            MAX_TX_BUF_LEN - 1) >>
1588                                            MAX_TX_BUF_SHIFT);
1589                         }
1590                 }
1591
1592         }
1593         return tpd_req;
1594 }
1595
1596 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1597                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1598 {
1599         u8 hdr_len;
1600         u32 real_len;
1601         unsigned short offload_type;
1602         int err;
1603
1604         if (skb_is_gso(skb)) {
1605                 if (skb_header_cloned(skb)) {
1606                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1607                         if (unlikely(err))
1608                                 return -1;
1609                 }
1610                 offload_type = skb_shinfo(skb)->gso_type;
1611
1612                 if (offload_type & SKB_GSO_TCPV4) {
1613                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1614                                         + ntohs(ip_hdr(skb)->tot_len));
1615
1616                         if (real_len < skb->len)
1617                                 pskb_trim(skb, real_len);
1618
1619                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1620                         if (unlikely(skb->len == hdr_len)) {
1621                                 /* only xsum need */
1622                                 netdev_warn(adapter->netdev,
1623                                             "IPV4 tso with zero data??\n");
1624                                 goto check_sum;
1625                         } else {
1626                                 ip_hdr(skb)->check = 0;
1627                                 ip_hdr(skb)->tot_len = 0;
1628                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1629                                                         ip_hdr(skb)->saddr,
1630                                                         ip_hdr(skb)->daddr,
1631                                                         0, IPPROTO_TCP, 0);
1632                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1633                                         TDP_V4_IPHL_MASK) <<
1634                                         TPD_V4_IPHL_SHIFT;
1635                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1636                                         TPD_TCPHDRLEN_MASK) <<
1637                                         TPD_TCPHDRLEN_SHIFT;
1638                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1639                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1640                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1641                         }
1642                         return 0;
1643                 }
1644         }
1645
1646 check_sum:
1647         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1648                 u8 css, cso;
1649
1650                 cso = skb_checksum_start_offset(skb);
1651                 if (unlikely(cso & 0x1)) {
1652                         netdev_err(adapter->netdev,
1653                                    "payload offset should not ant event number\n");
1654                         return -1;
1655                 } else {
1656                         css = cso + skb->csum_offset;
1657                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1658                                         TPD_PLOADOFFSET_SHIFT;
1659                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1660                                         TPD_CCSUMOFFSET_SHIFT;
1661                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1662                 }
1663         }
1664
1665         return 0;
1666 }
1667
1668 static void atl1e_tx_map(struct atl1e_adapter *adapter,
1669                       struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1670 {
1671         struct atl1e_tpd_desc *use_tpd = NULL;
1672         struct atl1e_tx_buffer *tx_buffer = NULL;
1673         u16 buf_len = skb_headlen(skb);
1674         u16 map_len = 0;
1675         u16 mapped_len = 0;
1676         u16 hdr_len = 0;
1677         u16 nr_frags;
1678         u16 f;
1679         int segment;
1680
1681         nr_frags = skb_shinfo(skb)->nr_frags;
1682         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1683         if (segment) {
1684                 /* TSO */
1685                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1686                 use_tpd = tpd;
1687
1688                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1689                 tx_buffer->length = map_len;
1690                 tx_buffer->dma = pci_map_single(adapter->pdev,
1691                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1692                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1693                 mapped_len += map_len;
1694                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1695                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1696                         ((cpu_to_le32(tx_buffer->length) &
1697                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1698         }
1699
1700         while (mapped_len < buf_len) {
1701                 /* mapped_len == 0, means we should use the first tpd,
1702                    which is given by caller  */
1703                 if (mapped_len == 0) {
1704                         use_tpd = tpd;
1705                 } else {
1706                         use_tpd = atl1e_get_tpd(adapter);
1707                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1708                 }
1709                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1710                 tx_buffer->skb = NULL;
1711
1712                 tx_buffer->length = map_len =
1713                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1714                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1715                 tx_buffer->dma =
1716                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1717                                         map_len, PCI_DMA_TODEVICE);
1718                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1719                 mapped_len  += map_len;
1720                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1721                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1722                         ((cpu_to_le32(tx_buffer->length) &
1723                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1724         }
1725
1726         for (f = 0; f < nr_frags; f++) {
1727                 struct skb_frag_struct *frag;
1728                 u16 i;
1729                 u16 seg_num;
1730
1731                 frag = &skb_shinfo(skb)->frags[f];
1732                 buf_len = frag->size;
1733
1734                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1735                 for (i = 0; i < seg_num; i++) {
1736                         use_tpd = atl1e_get_tpd(adapter);
1737                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1738
1739                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1740                         BUG_ON(tx_buffer->skb);
1741
1742                         tx_buffer->skb = NULL;
1743                         tx_buffer->length =
1744                                 (buf_len > MAX_TX_BUF_LEN) ?
1745                                 MAX_TX_BUF_LEN : buf_len;
1746                         buf_len -= tx_buffer->length;
1747
1748                         tx_buffer->dma =
1749                                 pci_map_page(adapter->pdev, frag->page,
1750                                                 frag->page_offset +
1751                                                 (i * MAX_TX_BUF_LEN),
1752                                                 tx_buffer->length,
1753                                                 PCI_DMA_TODEVICE);
1754                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1755                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1756                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1757                                         ((cpu_to_le32(tx_buffer->length) &
1758                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1759                 }
1760         }
1761
1762         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1763                 /* note this one is a tcp header */
1764                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1765         /* The last tpd */
1766
1767         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1768         /* The last buffer info contain the skb address,
1769            so it will be free after unmap */
1770         tx_buffer->skb = skb;
1771 }
1772
1773 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1774                            struct atl1e_tpd_desc *tpd)
1775 {
1776         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1777         /* Force memory writes to complete before letting h/w
1778          * know there are new descriptors to fetch.  (Only
1779          * applicable for weak-ordered memory model archs,
1780          * such as IA-64). */
1781         wmb();
1782         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1783 }
1784
1785 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1786                                           struct net_device *netdev)
1787 {
1788         struct atl1e_adapter *adapter = netdev_priv(netdev);
1789         unsigned long flags;
1790         u16 tpd_req = 1;
1791         struct atl1e_tpd_desc *tpd;
1792
1793         if (test_bit(__AT_DOWN, &adapter->flags)) {
1794                 dev_kfree_skb_any(skb);
1795                 return NETDEV_TX_OK;
1796         }
1797
1798         if (unlikely(skb->len <= 0)) {
1799                 dev_kfree_skb_any(skb);
1800                 return NETDEV_TX_OK;
1801         }
1802         tpd_req = atl1e_cal_tdp_req(skb);
1803         if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1804                 return NETDEV_TX_LOCKED;
1805
1806         if (atl1e_tpd_avail(adapter) < tpd_req) {
1807                 /* no enough descriptor, just stop queue */
1808                 netif_stop_queue(netdev);
1809                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1810                 return NETDEV_TX_BUSY;
1811         }
1812
1813         tpd = atl1e_get_tpd(adapter);
1814
1815         if (unlikely(vlan_tx_tag_present(skb))) {
1816                 u16 vlan_tag = vlan_tx_tag_get(skb);
1817                 u16 atl1e_vlan_tag;
1818
1819                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1820                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1821                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1822                                 TPD_VLAN_SHIFT;
1823         }
1824
1825         if (skb->protocol == htons(ETH_P_8021Q))
1826                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1827
1828         if (skb_network_offset(skb) != ETH_HLEN)
1829                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1830
1831         /* do TSO and check sum */
1832         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1833                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1834                 dev_kfree_skb_any(skb);
1835                 return NETDEV_TX_OK;
1836         }
1837
1838         atl1e_tx_map(adapter, skb, tpd);
1839         atl1e_tx_queue(adapter, tpd_req, tpd);
1840
1841         netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1842         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1843         return NETDEV_TX_OK;
1844 }
1845
1846 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1847 {
1848         struct net_device *netdev = adapter->netdev;
1849
1850         free_irq(adapter->pdev->irq, netdev);
1851
1852         if (adapter->have_msi)
1853                 pci_disable_msi(adapter->pdev);
1854 }
1855
1856 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1857 {
1858         struct pci_dev    *pdev   = adapter->pdev;
1859         struct net_device *netdev = adapter->netdev;
1860         int flags = 0;
1861         int err = 0;
1862
1863         adapter->have_msi = true;
1864         err = pci_enable_msi(adapter->pdev);
1865         if (err) {
1866                 netdev_dbg(adapter->netdev,
1867                            "Unable to allocate MSI interrupt Error: %d\n", err);
1868                 adapter->have_msi = false;
1869         } else
1870                 netdev->irq = pdev->irq;
1871
1872
1873         if (!adapter->have_msi)
1874                 flags |= IRQF_SHARED;
1875         err = request_irq(adapter->pdev->irq, atl1e_intr, flags,
1876                         netdev->name, netdev);
1877         if (err) {
1878                 netdev_dbg(adapter->netdev,
1879                            "Unable to allocate interrupt Error: %d\n", err);
1880                 if (adapter->have_msi)
1881                         pci_disable_msi(adapter->pdev);
1882                 return err;
1883         }
1884         netdev_dbg(adapter->netdev, "atl1e_request_irq OK\n");
1885         return err;
1886 }
1887
1888 int atl1e_up(struct atl1e_adapter *adapter)
1889 {
1890         struct net_device *netdev = adapter->netdev;
1891         int err = 0;
1892         u32 val;
1893
1894         /* hardware has been reset, we need to reload some things */
1895         err = atl1e_init_hw(&adapter->hw);
1896         if (err) {
1897                 err = -EIO;
1898                 return err;
1899         }
1900         atl1e_init_ring_ptrs(adapter);
1901         atl1e_set_multi(netdev);
1902         atl1e_restore_vlan(adapter);
1903
1904         if (atl1e_configure(adapter)) {
1905                 err = -EIO;
1906                 goto err_up;
1907         }
1908
1909         clear_bit(__AT_DOWN, &adapter->flags);
1910         napi_enable(&adapter->napi);
1911         atl1e_irq_enable(adapter);
1912         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1913         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1914                       val | MASTER_CTRL_MANUAL_INT);
1915
1916 err_up:
1917         return err;
1918 }
1919
1920 void atl1e_down(struct atl1e_adapter *adapter)
1921 {
1922         struct net_device *netdev = adapter->netdev;
1923
1924         /* signal that we're down so the interrupt handler does not
1925          * reschedule our watchdog timer */
1926         set_bit(__AT_DOWN, &adapter->flags);
1927
1928         netif_stop_queue(netdev);
1929
1930         /* reset MAC to disable all RX/TX */
1931         atl1e_reset_hw(&adapter->hw);
1932         msleep(1);
1933
1934         napi_disable(&adapter->napi);
1935         atl1e_del_timer(adapter);
1936         atl1e_irq_disable(adapter);
1937
1938         netif_carrier_off(netdev);
1939         adapter->link_speed = SPEED_0;
1940         adapter->link_duplex = -1;
1941         atl1e_clean_tx_ring(adapter);
1942         atl1e_clean_rx_ring(adapter);
1943 }
1944
1945 /*
1946  * atl1e_open - Called when a network interface is made active
1947  * @netdev: network interface device structure
1948  *
1949  * Returns 0 on success, negative value on failure
1950  *
1951  * The open entry point is called when a network interface is made
1952  * active by the system (IFF_UP).  At this point all resources needed
1953  * for transmit and receive operations are allocated, the interrupt
1954  * handler is registered with the OS, the watchdog timer is started,
1955  * and the stack is notified that the interface is ready.
1956  */
1957 static int atl1e_open(struct net_device *netdev)
1958 {
1959         struct atl1e_adapter *adapter = netdev_priv(netdev);
1960         int err;
1961
1962         /* disallow open during test */
1963         if (test_bit(__AT_TESTING, &adapter->flags))
1964                 return -EBUSY;
1965
1966         /* allocate rx/tx dma buffer & descriptors */
1967         atl1e_init_ring_resources(adapter);
1968         err = atl1e_setup_ring_resources(adapter);
1969         if (unlikely(err))
1970                 return err;
1971
1972         err = atl1e_request_irq(adapter);
1973         if (unlikely(err))
1974                 goto err_req_irq;
1975
1976         err = atl1e_up(adapter);
1977         if (unlikely(err))
1978                 goto err_up;
1979
1980         return 0;
1981
1982 err_up:
1983         atl1e_free_irq(adapter);
1984 err_req_irq:
1985         atl1e_free_ring_resources(adapter);
1986         atl1e_reset_hw(&adapter->hw);
1987
1988         return err;
1989 }
1990
1991 /*
1992  * atl1e_close - Disables a network interface
1993  * @netdev: network interface device structure
1994  *
1995  * Returns 0, this is not allowed to fail
1996  *
1997  * The close entry point is called when an interface is de-activated
1998  * by the OS.  The hardware is still under the drivers control, but
1999  * needs to be disabled.  A global MAC reset is issued to stop the
2000  * hardware, and all transmit and receive resources are freed.
2001  */
2002 static int atl1e_close(struct net_device *netdev)
2003 {
2004         struct atl1e_adapter *adapter = netdev_priv(netdev);
2005
2006         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2007         atl1e_down(adapter);
2008         atl1e_free_irq(adapter);
2009         atl1e_free_ring_resources(adapter);
2010
2011         return 0;
2012 }
2013
2014 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2015 {
2016         struct net_device *netdev = pci_get_drvdata(pdev);
2017         struct atl1e_adapter *adapter = netdev_priv(netdev);
2018         struct atl1e_hw *hw = &adapter->hw;
2019         u32 ctrl = 0;
2020         u32 mac_ctrl_data = 0;
2021         u32 wol_ctrl_data = 0;
2022         u16 mii_advertise_data = 0;
2023         u16 mii_bmsr_data = 0;
2024         u16 mii_intr_status_data = 0;
2025         u32 wufc = adapter->wol;
2026         u32 i;
2027 #ifdef CONFIG_PM
2028         int retval = 0;
2029 #endif
2030
2031         if (netif_running(netdev)) {
2032                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2033                 atl1e_down(adapter);
2034         }
2035         netif_device_detach(netdev);
2036
2037 #ifdef CONFIG_PM
2038         retval = pci_save_state(pdev);
2039         if (retval)
2040                 return retval;
2041 #endif
2042
2043         if (wufc) {
2044                 /* get link status */
2045                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2046                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2047
2048                 mii_advertise_data = ADVERTISE_10HALF;
2049
2050                 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2051                     (atl1e_write_phy_reg(hw,
2052                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2053                     (atl1e_phy_commit(hw)) != 0) {
2054                         netdev_dbg(adapter->netdev, "set phy register failed\n");
2055                         goto wol_dis;
2056                 }
2057
2058                 hw->phy_configured = false; /* re-init PHY when resume */
2059
2060                 /* turn on magic packet wol */
2061                 if (wufc & AT_WUFC_MAG)
2062                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2063
2064                 if (wufc & AT_WUFC_LNKC) {
2065                 /* if orignal link status is link, just wait for retrive link */
2066                         if (mii_bmsr_data & BMSR_LSTATUS) {
2067                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2068                                         msleep(100);
2069                                         atl1e_read_phy_reg(hw, MII_BMSR,
2070                                                         (u16 *)&mii_bmsr_data);
2071                                         if (mii_bmsr_data & BMSR_LSTATUS)
2072                                                 break;
2073                                 }
2074
2075                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2076                                         netdev_dbg(adapter->netdev,
2077                                                    "Link may change when suspend\n");
2078                         }
2079                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2080                         /* only link up can wake up */
2081                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2082                                 netdev_dbg(adapter->netdev,
2083                                            "read write phy register failed\n");
2084                                 goto wol_dis;
2085                         }
2086                 }
2087                 /* clear phy interrupt */
2088                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2089                 /* Config MAC Ctrl register */
2090                 mac_ctrl_data = MAC_CTRL_RX_EN;
2091                 /* set to 10/100M halt duplex */
2092                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2093                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2094                                  MAC_CTRL_PRMLEN_MASK) <<
2095                                  MAC_CTRL_PRMLEN_SHIFT);
2096
2097                 if (adapter->vlgrp)
2098                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2099
2100                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2101                 if (wufc & AT_WUFC_MAG)
2102                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2103
2104                 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2105                            mac_ctrl_data);
2106
2107                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2108                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2109                 /* pcie patch */
2110                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2111                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2112                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2113                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2114                 goto suspend_exit;
2115         }
2116 wol_dis:
2117
2118         /* WOL disabled */
2119         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2120
2121         /* pcie patch */
2122         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2123         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2124         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2125
2126         atl1e_force_ps(hw);
2127         hw->phy_configured = false; /* re-init PHY when resume */
2128
2129         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2130
2131 suspend_exit:
2132
2133         if (netif_running(netdev))
2134                 atl1e_free_irq(adapter);
2135
2136         pci_disable_device(pdev);
2137
2138         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2139
2140         return 0;
2141 }
2142
2143 #ifdef CONFIG_PM
2144 static int atl1e_resume(struct pci_dev *pdev)
2145 {
2146         struct net_device *netdev = pci_get_drvdata(pdev);
2147         struct atl1e_adapter *adapter = netdev_priv(netdev);
2148         u32 err;
2149
2150         pci_set_power_state(pdev, PCI_D0);
2151         pci_restore_state(pdev);
2152
2153         err = pci_enable_device(pdev);
2154         if (err) {
2155                 netdev_err(adapter->netdev,
2156                            "Cannot enable PCI device from suspend\n");
2157                 return err;
2158         }
2159
2160         pci_set_master(pdev);
2161
2162         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2163
2164         pci_enable_wake(pdev, PCI_D3hot, 0);
2165         pci_enable_wake(pdev, PCI_D3cold, 0);
2166
2167         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2168
2169         if (netif_running(netdev)) {
2170                 err = atl1e_request_irq(adapter);
2171                 if (err)
2172                         return err;
2173         }
2174
2175         atl1e_reset_hw(&adapter->hw);
2176
2177         if (netif_running(netdev))
2178                 atl1e_up(adapter);
2179
2180         netif_device_attach(netdev);
2181
2182         return 0;
2183 }
2184 #endif
2185
2186 static void atl1e_shutdown(struct pci_dev *pdev)
2187 {
2188         atl1e_suspend(pdev, PMSG_SUSPEND);
2189 }
2190
2191 static const struct net_device_ops atl1e_netdev_ops = {
2192         .ndo_open               = atl1e_open,
2193         .ndo_stop               = atl1e_close,
2194         .ndo_start_xmit         = atl1e_xmit_frame,
2195         .ndo_get_stats          = atl1e_get_stats,
2196         .ndo_set_multicast_list = atl1e_set_multi,
2197         .ndo_validate_addr      = eth_validate_addr,
2198         .ndo_set_mac_address    = atl1e_set_mac_addr,
2199         .ndo_change_mtu         = atl1e_change_mtu,
2200         .ndo_do_ioctl           = atl1e_ioctl,
2201         .ndo_tx_timeout         = atl1e_tx_timeout,
2202         .ndo_vlan_rx_register   = atl1e_vlan_rx_register,
2203 #ifdef CONFIG_NET_POLL_CONTROLLER
2204         .ndo_poll_controller    = atl1e_netpoll,
2205 #endif
2206
2207 };
2208
2209 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2210 {
2211         SET_NETDEV_DEV(netdev, &pdev->dev);
2212         pci_set_drvdata(pdev, netdev);
2213
2214         netdev->irq  = pdev->irq;
2215         netdev->netdev_ops = &atl1e_netdev_ops;
2216
2217         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2218         atl1e_set_ethtool_ops(netdev);
2219
2220         netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2221                 NETIF_F_HW_VLAN_TX;
2222         netdev->features = netdev->hw_features |
2223                 NETIF_F_HW_VLAN_RX | NETIF_F_LLTX;
2224
2225         return 0;
2226 }
2227
2228 /*
2229  * atl1e_probe - Device Initialization Routine
2230  * @pdev: PCI device information struct
2231  * @ent: entry in atl1e_pci_tbl
2232  *
2233  * Returns 0 on success, negative on failure
2234  *
2235  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2236  * The OS initialization, configuring of the adapter private structure,
2237  * and a hardware reset occur.
2238  */
2239 static int __devinit atl1e_probe(struct pci_dev *pdev,
2240                                  const struct pci_device_id *ent)
2241 {
2242         struct net_device *netdev;
2243         struct atl1e_adapter *adapter = NULL;
2244         static int cards_found;
2245
2246         int err = 0;
2247
2248         err = pci_enable_device(pdev);
2249         if (err) {
2250                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2251                 return err;
2252         }
2253
2254         /*
2255          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2256          * shared register for the high 32 bits, so only a single, aligned,
2257          * 4 GB physical address range can be used at a time.
2258          *
2259          * Supporting 64-bit DMA on this hardware is more trouble than it's
2260          * worth.  It is far easier to limit to 32-bit DMA than update
2261          * various kernel subsystems to support the mechanics required by a
2262          * fixed-high-32-bit system.
2263          */
2264         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2265             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2266                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2267                 goto err_dma;
2268         }
2269
2270         err = pci_request_regions(pdev, atl1e_driver_name);
2271         if (err) {
2272                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2273                 goto err_pci_reg;
2274         }
2275
2276         pci_set_master(pdev);
2277
2278         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2279         if (netdev == NULL) {
2280                 err = -ENOMEM;
2281                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2282                 goto err_alloc_etherdev;
2283         }
2284
2285         err = atl1e_init_netdev(netdev, pdev);
2286         if (err) {
2287                 netdev_err(netdev, "init netdevice failed\n");
2288                 goto err_init_netdev;
2289         }
2290         adapter = netdev_priv(netdev);
2291         adapter->bd_number = cards_found;
2292         adapter->netdev = netdev;
2293         adapter->pdev = pdev;
2294         adapter->hw.adapter = adapter;
2295         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2296         if (!adapter->hw.hw_addr) {
2297                 err = -EIO;
2298                 netdev_err(netdev, "cannot map device registers\n");
2299                 goto err_ioremap;
2300         }
2301         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2302
2303         /* init mii data */
2304         adapter->mii.dev = netdev;
2305         adapter->mii.mdio_read  = atl1e_mdio_read;
2306         adapter->mii.mdio_write = atl1e_mdio_write;
2307         adapter->mii.phy_id_mask = 0x1f;
2308         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2309
2310         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2311
2312         init_timer(&adapter->phy_config_timer);
2313         adapter->phy_config_timer.function = atl1e_phy_config;
2314         adapter->phy_config_timer.data = (unsigned long) adapter;
2315
2316         /* get user settings */
2317         atl1e_check_options(adapter);
2318         /*
2319          * Mark all PCI regions associated with PCI device
2320          * pdev as being reserved by owner atl1e_driver_name
2321          * Enables bus-mastering on the device and calls
2322          * pcibios_set_master to do the needed arch specific settings
2323          */
2324         atl1e_setup_pcicmd(pdev);
2325         /* setup the private structure */
2326         err = atl1e_sw_init(adapter);
2327         if (err) {
2328                 netdev_err(netdev, "net device private data init failed\n");
2329                 goto err_sw_init;
2330         }
2331
2332         /* Init GPHY as early as possible due to power saving issue  */
2333         atl1e_phy_init(&adapter->hw);
2334         /* reset the controller to
2335          * put the device in a known good starting state */
2336         err = atl1e_reset_hw(&adapter->hw);
2337         if (err) {
2338                 err = -EIO;
2339                 goto err_reset;
2340         }
2341
2342         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2343                 err = -EIO;
2344                 netdev_err(netdev, "get mac address failed\n");
2345                 goto err_eeprom;
2346         }
2347
2348         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2349         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2350         netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2351
2352         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2353         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2354         err = register_netdev(netdev);
2355         if (err) {
2356                 netdev_err(netdev, "register netdevice failed\n");
2357                 goto err_register;
2358         }
2359
2360         /* assume we have no link for now */
2361         netif_stop_queue(netdev);
2362         netif_carrier_off(netdev);
2363
2364         cards_found++;
2365
2366         return 0;
2367
2368 err_reset:
2369 err_register:
2370 err_sw_init:
2371 err_eeprom:
2372         iounmap(adapter->hw.hw_addr);
2373 err_init_netdev:
2374 err_ioremap:
2375         free_netdev(netdev);
2376 err_alloc_etherdev:
2377         pci_release_regions(pdev);
2378 err_pci_reg:
2379 err_dma:
2380         pci_disable_device(pdev);
2381         return err;
2382 }
2383
2384 /*
2385  * atl1e_remove - Device Removal Routine
2386  * @pdev: PCI device information struct
2387  *
2388  * atl1e_remove is called by the PCI subsystem to alert the driver
2389  * that it should release a PCI device.  The could be caused by a
2390  * Hot-Plug event, or because the driver is going to be removed from
2391  * memory.
2392  */
2393 static void __devexit atl1e_remove(struct pci_dev *pdev)
2394 {
2395         struct net_device *netdev = pci_get_drvdata(pdev);
2396         struct atl1e_adapter *adapter = netdev_priv(netdev);
2397
2398         /*
2399          * flush_scheduled work may reschedule our watchdog task, so
2400          * explicitly disable watchdog tasks from being rescheduled
2401          */
2402         set_bit(__AT_DOWN, &adapter->flags);
2403
2404         atl1e_del_timer(adapter);
2405         atl1e_cancel_work(adapter);
2406
2407         unregister_netdev(netdev);
2408         atl1e_free_ring_resources(adapter);
2409         atl1e_force_ps(&adapter->hw);
2410         iounmap(adapter->hw.hw_addr);
2411         pci_release_regions(pdev);
2412         free_netdev(netdev);
2413         pci_disable_device(pdev);
2414 }
2415
2416 /*
2417  * atl1e_io_error_detected - called when PCI error is detected
2418  * @pdev: Pointer to PCI device
2419  * @state: The current pci connection state
2420  *
2421  * This function is called after a PCI bus error affecting
2422  * this device has been detected.
2423  */
2424 static pci_ers_result_t
2425 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2426 {
2427         struct net_device *netdev = pci_get_drvdata(pdev);
2428         struct atl1e_adapter *adapter = netdev_priv(netdev);
2429
2430         netif_device_detach(netdev);
2431
2432         if (state == pci_channel_io_perm_failure)
2433                 return PCI_ERS_RESULT_DISCONNECT;
2434
2435         if (netif_running(netdev))
2436                 atl1e_down(adapter);
2437
2438         pci_disable_device(pdev);
2439
2440         /* Request a slot slot reset. */
2441         return PCI_ERS_RESULT_NEED_RESET;
2442 }
2443
2444 /*
2445  * atl1e_io_slot_reset - called after the pci bus has been reset.
2446  * @pdev: Pointer to PCI device
2447  *
2448  * Restart the card from scratch, as if from a cold-boot. Implementation
2449  * resembles the first-half of the e1000_resume routine.
2450  */
2451 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2452 {
2453         struct net_device *netdev = pci_get_drvdata(pdev);
2454         struct atl1e_adapter *adapter = netdev_priv(netdev);
2455
2456         if (pci_enable_device(pdev)) {
2457                 netdev_err(adapter->netdev,
2458                            "Cannot re-enable PCI device after reset\n");
2459                 return PCI_ERS_RESULT_DISCONNECT;
2460         }
2461         pci_set_master(pdev);
2462
2463         pci_enable_wake(pdev, PCI_D3hot, 0);
2464         pci_enable_wake(pdev, PCI_D3cold, 0);
2465
2466         atl1e_reset_hw(&adapter->hw);
2467
2468         return PCI_ERS_RESULT_RECOVERED;
2469 }
2470
2471 /*
2472  * atl1e_io_resume - called when traffic can start flowing again.
2473  * @pdev: Pointer to PCI device
2474  *
2475  * This callback is called when the error recovery driver tells us that
2476  * its OK to resume normal operation. Implementation resembles the
2477  * second-half of the atl1e_resume routine.
2478  */
2479 static void atl1e_io_resume(struct pci_dev *pdev)
2480 {
2481         struct net_device *netdev = pci_get_drvdata(pdev);
2482         struct atl1e_adapter *adapter = netdev_priv(netdev);
2483
2484         if (netif_running(netdev)) {
2485                 if (atl1e_up(adapter)) {
2486                         netdev_err(adapter->netdev,
2487                                    "can't bring device back up after reset\n");
2488                         return;
2489                 }
2490         }
2491
2492         netif_device_attach(netdev);
2493 }
2494
2495 static struct pci_error_handlers atl1e_err_handler = {
2496         .error_detected = atl1e_io_error_detected,
2497         .slot_reset = atl1e_io_slot_reset,
2498         .resume = atl1e_io_resume,
2499 };
2500
2501 static struct pci_driver atl1e_driver = {
2502         .name     = atl1e_driver_name,
2503         .id_table = atl1e_pci_tbl,
2504         .probe    = atl1e_probe,
2505         .remove   = __devexit_p(atl1e_remove),
2506         /* Power Management Hooks */
2507 #ifdef CONFIG_PM
2508         .suspend  = atl1e_suspend,
2509         .resume   = atl1e_resume,
2510 #endif
2511         .shutdown = atl1e_shutdown,
2512         .err_handler = &atl1e_err_handler
2513 };
2514
2515 /*
2516  * atl1e_init_module - Driver Registration Routine
2517  *
2518  * atl1e_init_module is the first routine called when the driver is
2519  * loaded. All it does is register with the PCI subsystem.
2520  */
2521 static int __init atl1e_init_module(void)
2522 {
2523         return pci_register_driver(&atl1e_driver);
2524 }
2525
2526 /*
2527  * atl1e_exit_module - Driver Exit Cleanup Routine
2528  *
2529  * atl1e_exit_module is called just before the driver is removed
2530  * from memory.
2531  */
2532 static void __exit atl1e_exit_module(void)
2533 {
2534         pci_unregister_driver(&atl1e_driver);
2535 }
2536
2537 module_init(atl1e_init_module);
2538 module_exit(atl1e_exit_module);