SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 dev_mc_list *mc_ptr;
 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         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 311                 hash_value = atl1e_hash_mc_addr(hw, mc_ptr->dmi_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
 551         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 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_tx_ring *tx_ring = NULL;
 695         struct atl1e_rx_ring *rx_ring = NULL;
 696
 697         tx_ring = &adapter->tx_ring;
 698         rx_ring = &adapter->rx_ring;
 699
 700         rx_ring->real_page_size = adapter->rx_ring.page_size
 701                                  + adapter->hw.max_frame_size
 702                                  + ETH_HLEN + VLAN_HLEN
 703                                  + ETH_FCS_LEN;
 704         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 705         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 706
 707         adapter->ring_vir_addr = NULL;
 708         adapter->rx_ring.desc = NULL;
 709         rwlock_init(&adapter->tx_ring.tx_lock);
 710
 711         return;
 712 }
 713
 714 /*
 715  * Read / Write Ptr Initialize:
 716  */
 717 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 718 {
 719         struct atl1e_tx_ring *tx_ring = NULL;
 720         struct atl1e_rx_ring *rx_ring = NULL;
 721         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 722         int i, j;
 723
 724         tx_ring = &adapter->tx_ring;
 725         rx_ring = &adapter->rx_ring;
 726         rx_page_desc = rx_ring->rx_page_desc;
 727
 728         tx_ring->next_to_use = 0;
 729         atomic_set(&tx_ring->next_to_clean, 0);
 730
 731         for (i = 0; i < adapter->num_rx_queues; i++) {
 732                 rx_page_desc[i].rx_using  = 0;
 733                 rx_page_desc[i].rx_nxseq = 0;
 734                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 735                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 736                         rx_page_desc[i].rx_page[j].read_offset = 0;
 737                 }
 738         }
 739 }
 740
 741 /*
 742  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 743  * @adapter: board private structure
 744  *
 745  * Free all transmit software resources
 746  */
 747 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 748 {
 749         struct pci_dev *pdev = adapter->pdev;
 750
 751         atl1e_clean_tx_ring(adapter);
 752         atl1e_clean_rx_ring(adapter);
 753
 754         if (adapter->ring_vir_addr) {
 755                 pci_free_consistent(pdev, adapter->ring_size,
 756                                 adapter->ring_vir_addr, adapter->ring_dma);
 757                 adapter->ring_vir_addr = NULL;
 758         }
 759
 760         if (adapter->tx_ring.tx_buffer) {
 761                 kfree(adapter->tx_ring.tx_buffer);
 762                 adapter->tx_ring.tx_buffer = NULL;
 763         }
 764 }
 765
 766 /*
 767  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 768  * @adapter: board private structure
 769  *
 770  * Return 0 on success, negative on failure
 771  */
 772 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 773 {
 774         struct pci_dev *pdev = adapter->pdev;
 775         struct atl1e_tx_ring *tx_ring;
 776         struct atl1e_rx_ring *rx_ring;
 777         struct atl1e_rx_page_desc  *rx_page_desc;
 778         int size, i, j;
 779         u32 offset = 0;
 780         int err = 0;
 781
 782         if (adapter->ring_vir_addr != NULL)
 783                 return 0; /* alloced already */
 784
 785         tx_ring = &adapter->tx_ring;
 786         rx_ring = &adapter->rx_ring;
 787
 788         /* real ring DMA buffer */
 789
 790         size = adapter->ring_size;
 791         adapter->ring_vir_addr = pci_alloc_consistent(pdev,
 792                         adapter->ring_size, &adapter->ring_dma);
 793
 794         if (adapter->ring_vir_addr == NULL) {
 795                 netdev_err(adapter->netdev,
 796                            "pci_alloc_consistent failed, size = D%d\n", size);
 797                 return -ENOMEM;
 798         }
 799
 800         memset(adapter->ring_vir_addr, 0, adapter->ring_size);
 801
 802         rx_page_desc = rx_ring->rx_page_desc;
 803
 804         /* Init TPD Ring */
 805         tx_ring->dma = roundup(adapter->ring_dma, 8);
 806         offset = tx_ring->dma - adapter->ring_dma;
 807         tx_ring->desc = (struct atl1e_tpd_desc *)
 808                         (adapter->ring_vir_addr + offset);
 809         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 810         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 811         if (tx_ring->tx_buffer == NULL) {
 812                 netdev_err(adapter->netdev, "kzalloc failed, size = D%d\n",
 813                            size);
 814                 err = -ENOMEM;
 815                 goto failed;
 816         }
 817
 818         /* Init RXF-Pages */
 819         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 820         offset = roundup(offset, 32);
 821
 822         for (i = 0; i < adapter->num_rx_queues; i++) {
 823                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 824                         rx_page_desc[i].rx_page[j].dma =
 825                                 adapter->ring_dma + offset;
 826                         rx_page_desc[i].rx_page[j].addr =
 827                                 adapter->ring_vir_addr + offset;
 828                         offset += rx_ring->real_page_size;
 829                 }
 830         }
 831
 832         /* Init CMB dma address */
 833         tx_ring->cmb_dma = adapter->ring_dma + offset;
 834         tx_ring->cmb     = (u32 *)(adapter->ring_vir_addr + offset);
 835         offset += sizeof(u32);
 836
 837         for (i = 0; i < adapter->num_rx_queues; i++) {
 838                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 839                         rx_page_desc[i].rx_page[j].write_offset_dma =
 840                                 adapter->ring_dma + offset;
 841                         rx_page_desc[i].rx_page[j].write_offset_addr =
 842                                 adapter->ring_vir_addr + offset;
 843                         offset += sizeof(u32);
 844                 }
 845         }
 846
 847         if (unlikely(offset > adapter->ring_size)) {
 848                 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 849                            offset, adapter->ring_size);
 850                 err = -1;
 851                 goto failed;
 852         }
 853
 854         return 0;
 855 failed:
 856         if (adapter->ring_vir_addr != NULL) {
 857                 pci_free_consistent(pdev, adapter->ring_size,
 858                                 adapter->ring_vir_addr, adapter->ring_dma);
 859                 adapter->ring_vir_addr = NULL;
 860         }
 861         return err;
 862 }
 863
 864 static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter)
 865 {
 866
 867         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 868         struct atl1e_rx_ring *rx_ring =
 869                         (struct atl1e_rx_ring *)&adapter->rx_ring;
 870         struct atl1e_tx_ring *tx_ring =
 871                         (struct atl1e_tx_ring *)&adapter->tx_ring;
 872         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 873         int i, j;
 874
 875         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 876                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 877         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 878                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 879         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 880         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 881                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 882
 883         rx_page_desc = rx_ring->rx_page_desc;
 884         /* RXF Page Physical address / Page Length */
 885         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 886                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 887                                  (u32)((adapter->ring_dma &
 888                                  AT_DMA_HI_ADDR_MASK) >> 32));
 889                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 890                         u32 page_phy_addr;
 891                         u32 offset_phy_addr;
 892
 893                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 894                         offset_phy_addr =
 895                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 896
 897                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 898                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 899                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 900                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 901                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 902                 }
 903         }
 904         /* Page Length */
 905         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 906         /* Load all of base address above */
 907         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 908
 909         return;
 910 }
 911
 912 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 913 {
 914         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 915         u32 dev_ctrl_data = 0;
 916         u32 max_pay_load = 0;
 917         u32 jumbo_thresh = 0;
 918         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 919
 920         /* configure TXQ param */
 921         if (hw->nic_type != athr_l2e_revB) {
 922                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 923                 if (hw->max_frame_size <= 1500) {
 924                         jumbo_thresh = hw->max_frame_size + extra_size;
 925                 } else if (hw->max_frame_size < 6*1024) {
 926                         jumbo_thresh =
 927                                 (hw->max_frame_size + extra_size) * 2 / 3;
 928                 } else {
 929                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 930                 }
 931                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 932         }
 933
 934         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 935
 936         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 937                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 938
 939         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
 940
 941         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 942                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 943         hw->dmar_block = min(max_pay_load, hw->dmar_block);
 944
 945         if (hw->nic_type != athr_l2e_revB)
 946                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 947                               atl1e_pay_load_size[hw->dmar_block]);
 948         /* enable TXQ */
 949         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 950                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 951                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 952                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 953         return;
 954 }
 955
 956 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 957 {
 958         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 959         u32 rxf_len  = 0;
 960         u32 rxf_low  = 0;
 961         u32 rxf_high = 0;
 962         u32 rxf_thresh_data = 0;
 963         u32 rxq_ctrl_data = 0;
 964
 965         if (hw->nic_type != athr_l2e_revB) {
 966                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 967                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 968                               RXQ_JMBOSZ_TH_SHIFT |
 969                               (1 & RXQ_JMBO_LKAH_MASK) <<
 970                               RXQ_JMBO_LKAH_SHIFT));
 971
 972                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 973                 rxf_high = rxf_len * 4 / 5;
 974                 rxf_low  = rxf_len / 5;
 975                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 976                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 977                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 978                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 979
 980                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 981         }
 982
 983         /* RRS */
 984         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
 985         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
 986
 987         if (hw->rrs_type & atl1e_rrs_ipv4)
 988                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
 989
 990         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
 991                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
 992
 993         if (hw->rrs_type & atl1e_rrs_ipv6)
 994                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
 995
 996         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
 997                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
 998
 999         if (hw->rrs_type != atl1e_rrs_disable)
1000                 rxq_ctrl_data |=
1001                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1002
1003         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1004                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1005
1006         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1007         return;
1008 }
1009
1010 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1011 {
1012         struct atl1e_hw *hw = &adapter->hw;
1013         u32 dma_ctrl_data = 0;
1014
1015         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1016         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1017                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1018         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1019                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1020         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1021         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1022                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1023         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1024                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1025
1026         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1027         return;
1028 }
1029
1030 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1031 {
1032         u32 value;
1033         struct atl1e_hw *hw = &adapter->hw;
1034         struct net_device *netdev = adapter->netdev;
1035
1036         /* Config MAC CTRL Register */
1037         value = MAC_CTRL_TX_EN |
1038                 MAC_CTRL_RX_EN ;
1039
1040         if (FULL_DUPLEX == adapter->link_duplex)
1041                 value |= MAC_CTRL_DUPLX;
1042
1043         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1044                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1045                           MAC_CTRL_SPEED_SHIFT);
1046         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1047
1048         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1049         value |= (((u32)adapter->hw.preamble_len &
1050                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1051
1052         if (adapter->vlgrp)
1053                 value |= MAC_CTRL_RMV_VLAN;
1054
1055         value |= MAC_CTRL_BC_EN;
1056         if (netdev->flags & IFF_PROMISC)
1057                 value |= MAC_CTRL_PROMIS_EN;
1058         if (netdev->flags & IFF_ALLMULTI)
1059                 value |= MAC_CTRL_MC_ALL_EN;
1060
1061         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1062 }
1063
1064 /*
1065  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1066  * @adapter: board private structure
1067  *
1068  * Configure the Tx /Rx unit of the MAC after a reset.
1069  */
1070 static int atl1e_configure(struct atl1e_adapter *adapter)
1071 {
1072         struct atl1e_hw *hw = &adapter->hw;
1073
1074         u32 intr_status_data = 0;
1075
1076         /* clear interrupt status */
1077         AT_WRITE_REG(hw, REG_ISR, ~0);
1078
1079         /* 1. set MAC Address */
1080         atl1e_hw_set_mac_addr(hw);
1081
1082         /* 2. Init the Multicast HASH table done by set_muti */
1083
1084         /* 3. Clear any WOL status */
1085         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1086
1087         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1088          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1089          *    High 32bits memory */
1090         atl1e_configure_des_ring(adapter);
1091
1092         /* 5. set Interrupt Moderator Timer */
1093         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1094         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1095         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1096                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1097
1098         /* 6. rx/tx threshold to trig interrupt */
1099         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1100         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1101         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1102         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1103
1104         /* 7. set Interrupt Clear Timer */
1105         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1106
1107         /* 8. set MTU */
1108         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1109                         VLAN_HLEN + ETH_FCS_LEN);
1110
1111         /* 9. config TXQ early tx threshold */
1112         atl1e_configure_tx(adapter);
1113
1114         /* 10. config RXQ */
1115         atl1e_configure_rx(adapter);
1116
1117         /* 11. config  DMA Engine */
1118         atl1e_configure_dma(adapter);
1119
1120         /* 12. smb timer to trig interrupt */
1121         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1122
1123         intr_status_data = AT_READ_REG(hw, REG_ISR);
1124         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1125                 netdev_err(adapter->netdev,
1126                            "atl1e_configure failed, PCIE phy link down\n");
1127                 return -1;
1128         }
1129
1130         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1131         return 0;
1132 }
1133
1134 /*
1135  * atl1e_get_stats - Get System Network Statistics
1136  * @netdev: network interface device structure
1137  *
1138  * Returns the address of the device statistics structure.
1139  * The statistics are actually updated from the timer callback.
1140  */
1141 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1142 {
1143         struct atl1e_adapter *adapter = netdev_priv(netdev);
1144         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1145         struct net_device_stats *net_stats = &netdev->stats;
1146
1147         net_stats->rx_packets = hw_stats->rx_ok;
1148         net_stats->tx_packets = hw_stats->tx_ok;
1149         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1150         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1151         net_stats->multicast  = hw_stats->rx_mcast;
1152         net_stats->collisions = hw_stats->tx_1_col +
1153                                 hw_stats->tx_2_col * 2 +
1154                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1155
1156         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1157                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1158                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1159         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1160         net_stats->rx_length_errors = hw_stats->rx_len_err;
1161         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1162         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1163         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1164
1165         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1166
1167         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1168                                hw_stats->tx_underrun + hw_stats->tx_trunc;
1169         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1170         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1171         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1172
1173         return net_stats;
1174 }
1175
1176 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1177 {
1178         u16 hw_reg_addr = 0;
1179         unsigned long *stats_item = NULL;
1180
1181         /* update rx status */
1182         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1183         stats_item  = &adapter->hw_stats.rx_ok;
1184         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1185                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1186                 stats_item++;
1187                 hw_reg_addr += 4;
1188         }
1189         /* update tx status */
1190         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1191         stats_item  = &adapter->hw_stats.tx_ok;
1192         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1193                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1194                 stats_item++;
1195                 hw_reg_addr += 4;
1196         }
1197 }
1198
1199 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1200 {
1201         u16 phy_data;
1202
1203         spin_lock(&adapter->mdio_lock);
1204         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1205         spin_unlock(&adapter->mdio_lock);
1206 }
1207
1208 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1209 {
1210         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
1211                                         &adapter->tx_ring;
1212         struct atl1e_tx_buffer *tx_buffer = NULL;
1213         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1214         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1215
1216         while (next_to_clean != hw_next_to_clean) {
1217                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1218                 if (tx_buffer->dma) {
1219                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1220                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1221                                         tx_buffer->length, PCI_DMA_TODEVICE);
1222                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1223                                 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1224                                         tx_buffer->length, PCI_DMA_TODEVICE);
1225                         tx_buffer->dma = 0;
1226                 }
1227
1228                 if (tx_buffer->skb) {
1229                         dev_kfree_skb_irq(tx_buffer->skb);
1230                         tx_buffer->skb = NULL;
1231                 }
1232
1233                 if (++next_to_clean == tx_ring->count)
1234                         next_to_clean = 0;
1235         }
1236
1237         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1238
1239         if (netif_queue_stopped(adapter->netdev) &&
1240                         netif_carrier_ok(adapter->netdev)) {
1241                 netif_wake_queue(adapter->netdev);
1242         }
1243
1244         return true;
1245 }
1246
1247 /*
1248  * atl1e_intr - Interrupt Handler
1249  * @irq: interrupt number
1250  * @data: pointer to a network interface device structure
1251  * @pt_regs: CPU registers structure
1252  */
1253 static irqreturn_t atl1e_intr(int irq, void *data)
1254 {
1255         struct net_device *netdev  = data;
1256         struct atl1e_adapter *adapter = netdev_priv(netdev);
1257         struct atl1e_hw *hw = &adapter->hw;
1258         int max_ints = AT_MAX_INT_WORK;
1259         int handled = IRQ_NONE;
1260         u32 status;
1261
1262         do {
1263                 status = AT_READ_REG(hw, REG_ISR);
1264                 if ((status & IMR_NORMAL_MASK) == 0 ||
1265                                 (status & ISR_DIS_INT) != 0) {
1266                         if (max_ints != AT_MAX_INT_WORK)
1267                                 handled = IRQ_HANDLED;
1268                         break;
1269                 }
1270                 /* link event */
1271                 if (status & ISR_GPHY)
1272                         atl1e_clear_phy_int(adapter);
1273                 /* Ack ISR */
1274                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1275
1276                 handled = IRQ_HANDLED;
1277                 /* check if PCIE PHY Link down */
1278                 if (status & ISR_PHY_LINKDOWN) {
1279                         netdev_err(adapter->netdev,
1280                                    "pcie phy linkdown %x\n", status);
1281                         if (netif_running(adapter->netdev)) {
1282                                 /* reset MAC */
1283                                 atl1e_irq_reset(adapter);
1284                                 schedule_work(&adapter->reset_task);
1285                                 break;
1286                         }
1287                 }
1288
1289                 /* check if DMA read/write error */
1290                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1291                         netdev_err(adapter->netdev,
1292                                    "PCIE DMA RW error (status = 0x%x)\n",
1293                                    status);
1294                         atl1e_irq_reset(adapter);
1295                         schedule_work(&adapter->reset_task);
1296                         break;
1297                 }
1298
1299                 if (status & ISR_SMB)
1300                         atl1e_update_hw_stats(adapter);
1301
1302                 /* link event */
1303                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1304                         netdev->stats.tx_carrier_errors++;
1305                         atl1e_link_chg_event(adapter);
1306                         break;
1307                 }
1308
1309                 /* transmit event */
1310                 if (status & ISR_TX_EVENT)
1311                         atl1e_clean_tx_irq(adapter);
1312
1313                 if (status & ISR_RX_EVENT) {
1314                         /*
1315                          * disable rx interrupts, without
1316                          * the synchronize_irq bit
1317                          */
1318                         AT_WRITE_REG(hw, REG_IMR,
1319                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1320                         AT_WRITE_FLUSH(hw);
1321                         if (likely(napi_schedule_prep(
1322                                    &adapter->napi)))
1323                                 __napi_schedule(&adapter->napi);
1324                 }
1325         } while (--max_ints > 0);
1326         /* re-enable Interrupt*/
1327         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1328
1329         return handled;
1330 }
1331
1332 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1333                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1334 {
1335         u8 *packet = (u8 *)(prrs + 1);
1336         struct iphdr *iph;
1337         u16 head_len = ETH_HLEN;
1338         u16 pkt_flags;
1339         u16 err_flags;
1340
1341         skb->ip_summed = CHECKSUM_NONE;
1342         pkt_flags = prrs->pkt_flag;
1343         err_flags = prrs->err_flag;
1344         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1345                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1346                 if (pkt_flags & RRS_IS_IPV4) {
1347                         if (pkt_flags & RRS_IS_802_3)
1348                                 head_len += 8;
1349                         iph = (struct iphdr *) (packet + head_len);
1350                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1351                                 goto hw_xsum;
1352                 }
1353                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1354                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1355                         return;
1356                 }
1357         }
1358
1359 hw_xsum :
1360         return;
1361 }
1362
1363 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1364                                                u8 que)
1365 {
1366         struct atl1e_rx_page_desc *rx_page_desc =
1367                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1368         u8 rx_using = rx_page_desc[que].rx_using;
1369
1370         return (struct atl1e_rx_page *)&(rx_page_desc[que].rx_page[rx_using]);
1371 }
1372
1373 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1374                    int *work_done, int work_to_do)
1375 {
1376         struct net_device *netdev  = adapter->netdev;
1377         struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *)
1378                                          &adapter->rx_ring;
1379         struct atl1e_rx_page_desc *rx_page_desc =
1380                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1381         struct sk_buff *skb = NULL;
1382         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1383         u32 packet_size, write_offset;
1384         struct atl1e_recv_ret_status *prrs;
1385
1386         write_offset = *(rx_page->write_offset_addr);
1387         if (likely(rx_page->read_offset < write_offset)) {
1388                 do {
1389                         if (*work_done >= work_to_do)
1390                                 break;
1391                         (*work_done)++;
1392                         /* get new packet's  rrs */
1393                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1394                                                  rx_page->read_offset);
1395                         /* check sequence number */
1396                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1397                                 netdev_err(netdev,
1398                                            "rx sequence number error (rx=%d) (expect=%d)\n",
1399                                            prrs->seq_num,
1400                                            rx_page_desc[que].rx_nxseq);
1401                                 rx_page_desc[que].rx_nxseq++;
1402                                 /* just for debug use */
1403                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1404                                              (((u32)prrs->seq_num) << 16) |
1405                                              rx_page_desc[que].rx_nxseq);
1406                                 goto fatal_err;
1407                         }
1408                         rx_page_desc[que].rx_nxseq++;
1409
1410                         /* error packet */
1411                         if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
1412                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1413                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1414                                         RRS_ERR_TRUNC)) {
1415                                 /* hardware error, discard this packet*/
1416                                         netdev_err(netdev,
1417                                                    "rx packet desc error %x\n",
1418                                                    *((u32 *)prrs + 1));
1419                                         goto skip_pkt;
1420                                 }
1421                         }
1422
1423                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1424                                         RRS_PKT_SIZE_MASK) - 4; /* CRC */
1425                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1426                         if (skb == NULL) {
1427                                 netdev_warn(netdev,
1428                                             "Memory squeeze, deferring packet\n");
1429                                 goto skip_pkt;
1430                         }
1431                         skb->dev = netdev;
1432                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1433                         skb_put(skb, packet_size);
1434                         skb->protocol = eth_type_trans(skb, netdev);
1435                         atl1e_rx_checksum(adapter, skb, prrs);
1436
1437                         if (unlikely(adapter->vlgrp &&
1438                                 (prrs->pkt_flag & RRS_IS_VLAN_TAG))) {
1439                                 u16 vlan_tag = (prrs->vtag >> 4) |
1440                                                ((prrs->vtag & 7) << 13) |
1441                                                ((prrs->vtag & 8) << 9);
1442                                 netdev_dbg(netdev,
1443                                            "RXD VLAN TAG<RRD>=0x%04x\n",
1444                                            prrs->vtag);
1445                                 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
1446                                                          vlan_tag);
1447                         } else {
1448                                 netif_receive_skb(skb);
1449                         }
1450
1451 skip_pkt:
1452         /* skip current packet whether it's ok or not. */
1453                         rx_page->read_offset +=
1454                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1455                                 RRS_PKT_SIZE_MASK) +
1456                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1457                                                 0xFFFFFFE0);
1458
1459                         if (rx_page->read_offset >= rx_ring->page_size) {
1460                                 /* mark this page clean */
1461                                 u16 reg_addr;
1462                                 u8  rx_using;
1463
1464                                 rx_page->read_offset =
1465                                         *(rx_page->write_offset_addr) = 0;
1466                                 rx_using = rx_page_desc[que].rx_using;
1467                                 reg_addr =
1468                                         atl1e_rx_page_vld_regs[que][rx_using];
1469                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1470                                 rx_page_desc[que].rx_using ^= 1;
1471                                 rx_page = atl1e_get_rx_page(adapter, que);
1472                         }
1473                         write_offset = *(rx_page->write_offset_addr);
1474                 } while (rx_page->read_offset < write_offset);
1475         }
1476
1477         return;
1478
1479 fatal_err:
1480         if (!test_bit(__AT_DOWN, &adapter->flags))
1481                 schedule_work(&adapter->reset_task);
1482 }
1483
1484 /*
1485  * atl1e_clean - NAPI Rx polling callback
1486  * @adapter: board private structure
1487  */
1488 static int atl1e_clean(struct napi_struct *napi, int budget)
1489 {
1490         struct atl1e_adapter *adapter =
1491                         container_of(napi, struct atl1e_adapter, napi);
1492         u32 imr_data;
1493         int work_done = 0;
1494
1495         /* Keep link state information with original netdev */
1496         if (!netif_carrier_ok(adapter->netdev))
1497                 goto quit_polling;
1498
1499         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1500
1501         /* If no Tx and not enough Rx work done, exit the polling mode */
1502         if (work_done < budget) {
1503 quit_polling:
1504                 napi_complete(napi);
1505                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1506                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1507                 /* test debug */
1508                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1509                         atomic_dec(&adapter->irq_sem);
1510                         netdev_err(adapter->netdev,
1511                                    "atl1e_clean is called when AT_DOWN\n");
1512                 }
1513                 /* reenable RX intr */
1514                 /*atl1e_irq_enable(adapter); */
1515
1516         }
1517         return work_done;
1518 }
1519
1520 #ifdef CONFIG_NET_POLL_CONTROLLER
1521
1522 /*
1523  * Polling 'interrupt' - used by things like netconsole to send skbs
1524  * without having to re-enable interrupts. It's not called while
1525  * the interrupt routine is executing.
1526  */
1527 static void atl1e_netpoll(struct net_device *netdev)
1528 {
1529         struct atl1e_adapter *adapter = netdev_priv(netdev);
1530
1531         disable_irq(adapter->pdev->irq);
1532         atl1e_intr(adapter->pdev->irq, netdev);
1533         enable_irq(adapter->pdev->irq);
1534 }
1535 #endif
1536
1537 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1538 {
1539         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1540         u16 next_to_use = 0;
1541         u16 next_to_clean = 0;
1542
1543         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1544         next_to_use   = tx_ring->next_to_use;
1545
1546         return (u16)(next_to_clean > next_to_use) ?
1547                 (next_to_clean - next_to_use - 1) :
1548                 (tx_ring->count + next_to_clean - next_to_use - 1);
1549 }
1550
1551 /*
1552  * get next usable tpd
1553  * Note: should call atl1e_tdp_avail to make sure
1554  * there is enough tpd to use
1555  */
1556 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1557 {
1558         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1559         u16 next_to_use = 0;
1560
1561         next_to_use = tx_ring->next_to_use;
1562         if (++tx_ring->next_to_use == tx_ring->count)
1563                 tx_ring->next_to_use = 0;
1564
1565         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1566         return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use];
1567 }
1568
1569 static struct atl1e_tx_buffer *
1570 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1571 {
1572         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1573
1574         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1575 }
1576
1577 /* Calculate the transmit packet descript needed*/
1578 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1579 {
1580         int i = 0;
1581         u16 tpd_req = 1;
1582         u16 fg_size = 0;
1583         u16 proto_hdr_len = 0;
1584
1585         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1586                 fg_size = skb_shinfo(skb)->frags[i].size;
1587                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1588         }
1589
1590         if (skb_is_gso(skb)) {
1591                 if (skb->protocol == htons(ETH_P_IP) ||
1592                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1593                         proto_hdr_len = skb_transport_offset(skb) +
1594                                         tcp_hdrlen(skb);
1595                         if (proto_hdr_len < skb_headlen(skb)) {
1596                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1597                                            MAX_TX_BUF_LEN - 1) >>
1598                                            MAX_TX_BUF_SHIFT);
1599                         }
1600                 }
1601
1602         }
1603         return tpd_req;
1604 }
1605
1606 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1607                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1608 {
1609         u8 hdr_len;
1610         u32 real_len;
1611         unsigned short offload_type;
1612         int err;
1613
1614         if (skb_is_gso(skb)) {
1615                 if (skb_header_cloned(skb)) {
1616                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1617                         if (unlikely(err))
1618                                 return -1;
1619                 }
1620                 offload_type = skb_shinfo(skb)->gso_type;
1621
1622                 if (offload_type & SKB_GSO_TCPV4) {
1623                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1624                                         + ntohs(ip_hdr(skb)->tot_len));
1625
1626                         if (real_len < skb->len)
1627                                 pskb_trim(skb, real_len);
1628
1629                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1630                         if (unlikely(skb->len == hdr_len)) {
1631                                 /* only xsum need */
1632                                 netdev_warn(adapter->netdev,
1633                                             "IPV4 tso with zero data??\n");
1634                                 goto check_sum;
1635                         } else {
1636                                 ip_hdr(skb)->check = 0;
1637                                 ip_hdr(skb)->tot_len = 0;
1638                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1639                                                         ip_hdr(skb)->saddr,
1640                                                         ip_hdr(skb)->daddr,
1641                                                         0, IPPROTO_TCP, 0);
1642                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1643                                         TDP_V4_IPHL_MASK) <<
1644                                         TPD_V4_IPHL_SHIFT;
1645                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1646                                         TPD_TCPHDRLEN_MASK) <<
1647                                         TPD_TCPHDRLEN_SHIFT;
1648                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1649                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1650                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1651                         }
1652                         return 0;
1653                 }
1654         }
1655
1656 check_sum:
1657         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1658                 u8 css, cso;
1659
1660                 cso = skb_transport_offset(skb);
1661                 if (unlikely(cso & 0x1)) {
1662                         netdev_err(adapter->netdev,
1663                                    "payload offset should not ant event number\n");
1664                         return -1;
1665                 } else {
1666                         css = cso + skb->csum_offset;
1667                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1668                                         TPD_PLOADOFFSET_SHIFT;
1669                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1670                                         TPD_CCSUMOFFSET_SHIFT;
1671                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1672                 }
1673         }
1674
1675         return 0;
1676 }
1677
1678 static void atl1e_tx_map(struct atl1e_adapter *adapter,
1679                       struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1680 {
1681         struct atl1e_tpd_desc *use_tpd = NULL;
1682         struct atl1e_tx_buffer *tx_buffer = NULL;
1683         u16 buf_len = skb->len - skb->data_len;
1684         u16 map_len = 0;
1685         u16 mapped_len = 0;
1686         u16 hdr_len = 0;
1687         u16 nr_frags;
1688         u16 f;
1689         int segment;
1690
1691         nr_frags = skb_shinfo(skb)->nr_frags;
1692         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1693         if (segment) {
1694                 /* TSO */
1695                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1696                 use_tpd = tpd;
1697
1698                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1699                 tx_buffer->length = map_len;
1700                 tx_buffer->dma = pci_map_single(adapter->pdev,
1701                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1702                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1703                 mapped_len += map_len;
1704                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1705                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1706                         ((cpu_to_le32(tx_buffer->length) &
1707                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1708         }
1709
1710         while (mapped_len < buf_len) {
1711                 /* mapped_len == 0, means we should use the first tpd,
1712                    which is given by caller  */
1713                 if (mapped_len == 0) {
1714                         use_tpd = tpd;
1715                 } else {
1716                         use_tpd = atl1e_get_tpd(adapter);
1717                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1718                 }
1719                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1720                 tx_buffer->skb = NULL;
1721
1722                 tx_buffer->length = map_len =
1723                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1724                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1725                 tx_buffer->dma =
1726                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1727                                         map_len, PCI_DMA_TODEVICE);
1728                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1729                 mapped_len  += map_len;
1730                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1731                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1732                         ((cpu_to_le32(tx_buffer->length) &
1733                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1734         }
1735
1736         for (f = 0; f < nr_frags; f++) {
1737                 struct skb_frag_struct *frag;
1738                 u16 i;
1739                 u16 seg_num;
1740
1741                 frag = &skb_shinfo(skb)->frags[f];
1742                 buf_len = frag->size;
1743
1744                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1745                 for (i = 0; i < seg_num; i++) {
1746                         use_tpd = atl1e_get_tpd(adapter);
1747                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1748
1749                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1750                         BUG_ON(tx_buffer->skb);
1751
1752                         tx_buffer->skb = NULL;
1753                         tx_buffer->length =
1754                                 (buf_len > MAX_TX_BUF_LEN) ?
1755                                 MAX_TX_BUF_LEN : buf_len;
1756                         buf_len -= tx_buffer->length;
1757
1758                         tx_buffer->dma =
1759                                 pci_map_page(adapter->pdev, frag->page,
1760                                                 frag->page_offset +
1761                                                 (i * MAX_TX_BUF_LEN),
1762                                                 tx_buffer->length,
1763                                                 PCI_DMA_TODEVICE);
1764                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1765                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1766                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1767                                         ((cpu_to_le32(tx_buffer->length) &
1768                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1769                 }
1770         }
1771
1772         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1773                 /* note this one is a tcp header */
1774                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1775         /* The last tpd */
1776
1777         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1778         /* The last buffer info contain the skb address,
1779            so it will be free after unmap */
1780         tx_buffer->skb = skb;
1781 }
1782
1783 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1784                            struct atl1e_tpd_desc *tpd)
1785 {
1786         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1787         /* Force memory writes to complete before letting h/w
1788          * know there are new descriptors to fetch.  (Only
1789          * applicable for weak-ordered memory model archs,
1790          * such as IA-64). */
1791         wmb();
1792         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1793 }
1794
1795 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1796                                           struct net_device *netdev)
1797 {
1798         struct atl1e_adapter *adapter = netdev_priv(netdev);
1799         unsigned long flags;
1800         u16 tpd_req = 1;
1801         struct atl1e_tpd_desc *tpd;
1802
1803         if (test_bit(__AT_DOWN, &adapter->flags)) {
1804                 dev_kfree_skb_any(skb);
1805                 return NETDEV_TX_OK;
1806         }
1807
1808         if (unlikely(skb->len <= 0)) {
1809                 dev_kfree_skb_any(skb);
1810                 return NETDEV_TX_OK;
1811         }
1812         tpd_req = atl1e_cal_tdp_req(skb);
1813         if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1814                 return NETDEV_TX_LOCKED;
1815
1816         if (atl1e_tpd_avail(adapter) < tpd_req) {
1817                 /* no enough descriptor, just stop queue */
1818                 netif_stop_queue(netdev);
1819                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1820                 return NETDEV_TX_BUSY;
1821         }
1822
1823         tpd = atl1e_get_tpd(adapter);
1824
1825         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
1826                 u16 vlan_tag = vlan_tx_tag_get(skb);
1827                 u16 atl1e_vlan_tag;
1828
1829                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1830                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1831                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1832                                 TPD_VLAN_SHIFT;
1833         }
1834
1835         if (skb->protocol == htons(ETH_P_8021Q))
1836                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1837
1838         if (skb_network_offset(skb) != ETH_HLEN)
1839                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1840
1841         /* do TSO and check sum */
1842         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1843                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1844                 dev_kfree_skb_any(skb);
1845                 return NETDEV_TX_OK;
1846         }
1847
1848         atl1e_tx_map(adapter, skb, tpd);
1849         atl1e_tx_queue(adapter, tpd_req, tpd);
1850
1851         netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1852         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1853         return NETDEV_TX_OK;
1854 }
1855
1856 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1857 {
1858         struct net_device *netdev = adapter->netdev;
1859
1860         free_irq(adapter->pdev->irq, netdev);
1861
1862         if (adapter->have_msi)
1863                 pci_disable_msi(adapter->pdev);
1864 }
1865
1866 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1867 {
1868         struct pci_dev    *pdev   = adapter->pdev;
1869         struct net_device *netdev = adapter->netdev;
1870         int flags = 0;
1871         int err = 0;
1872
1873         adapter->have_msi = true;
1874         err = pci_enable_msi(adapter->pdev);
1875         if (err) {
1876                 netdev_dbg(adapter->netdev,
1877                            "Unable to allocate MSI interrupt Error: %d\n", err);
1878                 adapter->have_msi = false;
1879         } else
1880                 netdev->irq = pdev->irq;
1881
1882
1883         if (!adapter->have_msi)
1884                 flags |= IRQF_SHARED;
1885         err = request_irq(adapter->pdev->irq, atl1e_intr, flags,
1886                         netdev->name, netdev);
1887         if (err) {
1888                 netdev_dbg(adapter->netdev,
1889                            "Unable to allocate interrupt Error: %d\n", err);
1890                 if (adapter->have_msi)
1891                         pci_disable_msi(adapter->pdev);
1892                 return err;
1893         }
1894         netdev_dbg(adapter->netdev, "atl1e_request_irq OK\n");
1895         return err;
1896 }
1897
1898 int atl1e_up(struct atl1e_adapter *adapter)
1899 {
1900         struct net_device *netdev = adapter->netdev;
1901         int err = 0;
1902         u32 val;
1903
1904         /* hardware has been reset, we need to reload some things */
1905         err = atl1e_init_hw(&adapter->hw);
1906         if (err) {
1907                 err = -EIO;
1908                 return err;
1909         }
1910         atl1e_init_ring_ptrs(adapter);
1911         atl1e_set_multi(netdev);
1912         atl1e_restore_vlan(adapter);
1913
1914         if (atl1e_configure(adapter)) {
1915                 err = -EIO;
1916                 goto err_up;
1917         }
1918
1919         clear_bit(__AT_DOWN, &adapter->flags);
1920         napi_enable(&adapter->napi);
1921         atl1e_irq_enable(adapter);
1922         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1923         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1924                       val | MASTER_CTRL_MANUAL_INT);
1925
1926 err_up:
1927         return err;
1928 }
1929
1930 void atl1e_down(struct atl1e_adapter *adapter)
1931 {
1932         struct net_device *netdev = adapter->netdev;
1933
1934         /* signal that we're down so the interrupt handler does not
1935          * reschedule our watchdog timer */
1936         set_bit(__AT_DOWN, &adapter->flags);
1937
1938 #ifdef NETIF_F_LLTX
1939         netif_stop_queue(netdev);
1940 #else
1941         netif_tx_disable(netdev);
1942 #endif
1943
1944         /* reset MAC to disable all RX/TX */
1945         atl1e_reset_hw(&adapter->hw);
1946         msleep(1);
1947
1948         napi_disable(&adapter->napi);
1949         atl1e_del_timer(adapter);
1950         atl1e_irq_disable(adapter);
1951
1952         netif_carrier_off(netdev);
1953         adapter->link_speed = SPEED_0;
1954         adapter->link_duplex = -1;
1955         atl1e_clean_tx_ring(adapter);
1956         atl1e_clean_rx_ring(adapter);
1957 }
1958
1959 /*
1960  * atl1e_open - Called when a network interface is made active
1961  * @netdev: network interface device structure
1962  *
1963  * Returns 0 on success, negative value on failure
1964  *
1965  * The open entry point is called when a network interface is made
1966  * active by the system (IFF_UP).  At this point all resources needed
1967  * for transmit and receive operations are allocated, the interrupt
1968  * handler is registered with the OS, the watchdog timer is started,
1969  * and the stack is notified that the interface is ready.
1970  */
1971 static int atl1e_open(struct net_device *netdev)
1972 {
1973         struct atl1e_adapter *adapter = netdev_priv(netdev);
1974         int err;
1975
1976         /* disallow open during test */
1977         if (test_bit(__AT_TESTING, &adapter->flags))
1978                 return -EBUSY;
1979
1980         /* allocate rx/tx dma buffer & descriptors */
1981         atl1e_init_ring_resources(adapter);
1982         err = atl1e_setup_ring_resources(adapter);
1983         if (unlikely(err))
1984                 return err;
1985
1986         err = atl1e_request_irq(adapter);
1987         if (unlikely(err))
1988                 goto err_req_irq;
1989
1990         err = atl1e_up(adapter);
1991         if (unlikely(err))
1992                 goto err_up;
1993
1994         return 0;
1995
1996 err_up:
1997         atl1e_free_irq(adapter);
1998 err_req_irq:
1999         atl1e_free_ring_resources(adapter);
2000         atl1e_reset_hw(&adapter->hw);
2001
2002         return err;
2003 }
2004
2005 /*
2006  * atl1e_close - Disables a network interface
2007  * @netdev: network interface device structure
2008  *
2009  * Returns 0, this is not allowed to fail
2010  *
2011  * The close entry point is called when an interface is de-activated
2012  * by the OS.  The hardware is still under the drivers control, but
2013  * needs to be disabled.  A global MAC reset is issued to stop the
2014  * hardware, and all transmit and receive resources are freed.
2015  */
2016 static int atl1e_close(struct net_device *netdev)
2017 {
2018         struct atl1e_adapter *adapter = netdev_priv(netdev);
2019
2020         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2021         atl1e_down(adapter);
2022         atl1e_free_irq(adapter);
2023         atl1e_free_ring_resources(adapter);
2024
2025         return 0;
2026 }
2027
2028 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2029 {
2030         struct net_device *netdev = pci_get_drvdata(pdev);
2031         struct atl1e_adapter *adapter = netdev_priv(netdev);
2032         struct atl1e_hw *hw = &adapter->hw;
2033         u32 ctrl = 0;
2034         u32 mac_ctrl_data = 0;
2035         u32 wol_ctrl_data = 0;
2036         u16 mii_advertise_data = 0;
2037         u16 mii_bmsr_data = 0;
2038         u16 mii_intr_status_data = 0;
2039         u32 wufc = adapter->wol;
2040         u32 i;
2041 #ifdef CONFIG_PM
2042         int retval = 0;
2043 #endif
2044
2045         if (netif_running(netdev)) {
2046                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2047                 atl1e_down(adapter);
2048         }
2049         netif_device_detach(netdev);
2050
2051 #ifdef CONFIG_PM
2052         retval = pci_save_state(pdev);
2053         if (retval)
2054                 return retval;
2055 #endif
2056
2057         if (wufc) {
2058                 /* get link status */
2059                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2060                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2061
2062                 mii_advertise_data = MII_AR_10T_HD_CAPS;
2063
2064                 if ((atl1e_write_phy_reg(hw, MII_AT001_CR, 0) != 0) ||
2065                     (atl1e_write_phy_reg(hw,
2066                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2067                     (atl1e_phy_commit(hw)) != 0) {
2068                         netdev_dbg(adapter->netdev, "set phy register failed\n");
2069                         goto wol_dis;
2070                 }
2071
2072                 hw->phy_configured = false; /* re-init PHY when resume */
2073
2074                 /* turn on magic packet wol */
2075                 if (wufc & AT_WUFC_MAG)
2076                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2077
2078                 if (wufc & AT_WUFC_LNKC) {
2079                 /* if orignal link status is link, just wait for retrive link */
2080                         if (mii_bmsr_data & BMSR_LSTATUS) {
2081                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2082                                         msleep(100);
2083                                         atl1e_read_phy_reg(hw, MII_BMSR,
2084                                                         (u16 *)&mii_bmsr_data);
2085                                         if (mii_bmsr_data & BMSR_LSTATUS)
2086                                                 break;
2087                                 }
2088
2089                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2090                                         netdev_dbg(adapter->netdev,
2091                                                    "Link may change when suspend\n");
2092                         }
2093                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2094                         /* only link up can wake up */
2095                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2096                                 netdev_dbg(adapter->netdev,
2097                                            "read write phy register failed\n");
2098                                 goto wol_dis;
2099                         }
2100                 }
2101                 /* clear phy interrupt */
2102                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2103                 /* Config MAC Ctrl register */
2104                 mac_ctrl_data = MAC_CTRL_RX_EN;
2105                 /* set to 10/100M halt duplex */
2106                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2107                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2108                                  MAC_CTRL_PRMLEN_MASK) <<
2109                                  MAC_CTRL_PRMLEN_SHIFT);
2110
2111                 if (adapter->vlgrp)
2112                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2113
2114                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2115                 if (wufc & AT_WUFC_MAG)
2116                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2117
2118                 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2119                            mac_ctrl_data);
2120
2121                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2122                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2123                 /* pcie patch */
2124                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2125                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2126                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2127                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2128                 goto suspend_exit;
2129         }
2130 wol_dis:
2131
2132         /* WOL disabled */
2133         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2134
2135         /* pcie patch */
2136         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2137         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2138         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2139
2140         atl1e_force_ps(hw);
2141         hw->phy_configured = false; /* re-init PHY when resume */
2142
2143         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2144
2145 suspend_exit:
2146
2147         if (netif_running(netdev))
2148                 atl1e_free_irq(adapter);
2149
2150         pci_disable_device(pdev);
2151
2152         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2153
2154         return 0;
2155 }
2156
2157 #ifdef CONFIG_PM
2158 static int atl1e_resume(struct pci_dev *pdev)
2159 {
2160         struct net_device *netdev = pci_get_drvdata(pdev);
2161         struct atl1e_adapter *adapter = netdev_priv(netdev);
2162         u32 err;
2163
2164         pci_set_power_state(pdev, PCI_D0);
2165         pci_restore_state(pdev);
2166
2167         err = pci_enable_device(pdev);
2168         if (err) {
2169                 netdev_err(adapter->netdev,
2170                            "Cannot enable PCI device from suspend\n");
2171                 return err;
2172         }
2173
2174         pci_set_master(pdev);
2175
2176         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2177
2178         pci_enable_wake(pdev, PCI_D3hot, 0);
2179         pci_enable_wake(pdev, PCI_D3cold, 0);
2180
2181         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2182
2183         if (netif_running(netdev)) {
2184                 err = atl1e_request_irq(adapter);
2185                 if (err)
2186                         return err;
2187         }
2188
2189         atl1e_reset_hw(&adapter->hw);
2190
2191         if (netif_running(netdev))
2192                 atl1e_up(adapter);
2193
2194         netif_device_attach(netdev);
2195
2196         return 0;
2197 }
2198 #endif
2199
2200 static void atl1e_shutdown(struct pci_dev *pdev)
2201 {
2202         atl1e_suspend(pdev, PMSG_SUSPEND);
2203 }
2204
2205 static const struct net_device_ops atl1e_netdev_ops = {
2206         .ndo_open               = atl1e_open,
2207         .ndo_stop               = atl1e_close,
2208         .ndo_start_xmit         = atl1e_xmit_frame,
2209         .ndo_get_stats          = atl1e_get_stats,
2210         .ndo_set_multicast_list = atl1e_set_multi,
2211         .ndo_validate_addr      = eth_validate_addr,
2212         .ndo_set_mac_address    = atl1e_set_mac_addr,
2213         .ndo_change_mtu         = atl1e_change_mtu,
2214         .ndo_do_ioctl           = atl1e_ioctl,
2215         .ndo_tx_timeout         = atl1e_tx_timeout,
2216         .ndo_vlan_rx_register   = atl1e_vlan_rx_register,
2217 #ifdef CONFIG_NET_POLL_CONTROLLER
2218         .ndo_poll_controller    = atl1e_netpoll,
2219 #endif
2220
2221 };
2222
2223 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2224 {
2225         SET_NETDEV_DEV(netdev, &pdev->dev);
2226         pci_set_drvdata(pdev, netdev);
2227
2228         netdev->irq  = pdev->irq;
2229         netdev->netdev_ops = &atl1e_netdev_ops;
2230
2231         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2232         atl1e_set_ethtool_ops(netdev);
2233
2234         netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM |
2235                 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2236         netdev->features |= NETIF_F_LLTX;
2237         netdev->features |= NETIF_F_TSO;
2238
2239         return 0;
2240 }
2241
2242 /*
2243  * atl1e_probe - Device Initialization Routine
2244  * @pdev: PCI device information struct
2245  * @ent: entry in atl1e_pci_tbl
2246  *
2247  * Returns 0 on success, negative on failure
2248  *
2249  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2250  * The OS initialization, configuring of the adapter private structure,
2251  * and a hardware reset occur.
2252  */
2253 static int __devinit atl1e_probe(struct pci_dev *pdev,
2254                                  const struct pci_device_id *ent)
2255 {
2256         struct net_device *netdev;
2257         struct atl1e_adapter *adapter = NULL;
2258         static int cards_found;
2259
2260         int err = 0;
2261
2262         err = pci_enable_device(pdev);
2263         if (err) {
2264                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2265                 return err;
2266         }
2267
2268         /*
2269          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2270          * shared register for the high 32 bits, so only a single, aligned,
2271          * 4 GB physical address range can be used at a time.
2272          *
2273          * Supporting 64-bit DMA on this hardware is more trouble than it's
2274          * worth.  It is far easier to limit to 32-bit DMA than update
2275          * various kernel subsystems to support the mechanics required by a
2276          * fixed-high-32-bit system.
2277          */
2278         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2279             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2280                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2281                 goto err_dma;
2282         }
2283
2284         err = pci_request_regions(pdev, atl1e_driver_name);
2285         if (err) {
2286                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2287                 goto err_pci_reg;
2288         }
2289
2290         pci_set_master(pdev);
2291
2292         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2293         if (netdev == NULL) {
2294                 err = -ENOMEM;
2295                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2296                 goto err_alloc_etherdev;
2297         }
2298
2299         err = atl1e_init_netdev(netdev, pdev);
2300         if (err) {
2301                 netdev_err(netdev, "init netdevice failed\n");
2302                 goto err_init_netdev;
2303         }
2304         adapter = netdev_priv(netdev);
2305         adapter->bd_number = cards_found;
2306         adapter->netdev = netdev;
2307         adapter->pdev = pdev;
2308         adapter->hw.adapter = adapter;
2309         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2310         if (!adapter->hw.hw_addr) {
2311                 err = -EIO;
2312                 netdev_err(netdev, "cannot map device registers\n");
2313                 goto err_ioremap;
2314         }
2315         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2316
2317         /* init mii data */
2318         adapter->mii.dev = netdev;
2319         adapter->mii.mdio_read  = atl1e_mdio_read;
2320         adapter->mii.mdio_write = atl1e_mdio_write;
2321         adapter->mii.phy_id_mask = 0x1f;
2322         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2323
2324         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2325
2326         init_timer(&adapter->phy_config_timer);
2327         adapter->phy_config_timer.function = &atl1e_phy_config;
2328         adapter->phy_config_timer.data = (unsigned long) adapter;
2329
2330         /* get user settings */
2331         atl1e_check_options(adapter);
2332         /*
2333          * Mark all PCI regions associated with PCI device
2334          * pdev as being reserved by owner atl1e_driver_name
2335          * Enables bus-mastering on the device and calls
2336          * pcibios_set_master to do the needed arch specific settings
2337          */
2338         atl1e_setup_pcicmd(pdev);
2339         /* setup the private structure */
2340         err = atl1e_sw_init(adapter);
2341         if (err) {
2342                 netdev_err(netdev, "net device private data init failed\n");
2343                 goto err_sw_init;
2344         }
2345
2346         /* Init GPHY as early as possible due to power saving issue  */
2347         atl1e_phy_init(&adapter->hw);
2348         /* reset the controller to
2349          * put the device in a known good starting state */
2350         err = atl1e_reset_hw(&adapter->hw);
2351         if (err) {
2352                 err = -EIO;
2353                 goto err_reset;
2354         }
2355
2356         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2357                 err = -EIO;
2358                 netdev_err(netdev, "get mac address failed\n");
2359                 goto err_eeprom;
2360         }
2361
2362         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2363         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2364         netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2365
2366         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2367         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2368         err = register_netdev(netdev);
2369         if (err) {
2370                 netdev_err(netdev, "register netdevice failed\n");
2371                 goto err_register;
2372         }
2373
2374         /* assume we have no link for now */
2375         netif_stop_queue(netdev);
2376         netif_carrier_off(netdev);
2377
2378         cards_found++;
2379
2380         return 0;
2381
2382 err_reset:
2383 err_register:
2384 err_sw_init:
2385 err_eeprom:
2386         iounmap(adapter->hw.hw_addr);
2387 err_init_netdev:
2388 err_ioremap:
2389         free_netdev(netdev);
2390 err_alloc_etherdev:
2391         pci_release_regions(pdev);
2392 err_pci_reg:
2393 err_dma:
2394         pci_disable_device(pdev);
2395         return err;
2396 }
2397
2398 /*
2399  * atl1e_remove - Device Removal Routine
2400  * @pdev: PCI device information struct
2401  *
2402  * atl1e_remove is called by the PCI subsystem to alert the driver
2403  * that it should release a PCI device.  The could be caused by a
2404  * Hot-Plug event, or because the driver is going to be removed from
2405  * memory.
2406  */
2407 static void __devexit atl1e_remove(struct pci_dev *pdev)
2408 {
2409         struct net_device *netdev = pci_get_drvdata(pdev);
2410         struct atl1e_adapter *adapter = netdev_priv(netdev);
2411
2412         /*
2413          * flush_scheduled work may reschedule our watchdog task, so
2414          * explicitly disable watchdog tasks from being rescheduled
2415          */
2416         set_bit(__AT_DOWN, &adapter->flags);
2417
2418         atl1e_del_timer(adapter);
2419         atl1e_cancel_work(adapter);
2420
2421         unregister_netdev(netdev);
2422         atl1e_free_ring_resources(adapter);
2423         atl1e_force_ps(&adapter->hw);
2424         iounmap(adapter->hw.hw_addr);
2425         pci_release_regions(pdev);
2426         free_netdev(netdev);
2427         pci_disable_device(pdev);
2428 }
2429
2430 /*
2431  * atl1e_io_error_detected - called when PCI error is detected
2432  * @pdev: Pointer to PCI device
2433  * @state: The current pci connection state
2434  *
2435  * This function is called after a PCI bus error affecting
2436  * this device has been detected.
2437  */
2438 static pci_ers_result_t
2439 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2440 {
2441         struct net_device *netdev = pci_get_drvdata(pdev);
2442         struct atl1e_adapter *adapter = netdev_priv(netdev);
2443
2444         netif_device_detach(netdev);
2445
2446         if (state == pci_channel_io_perm_failure)
2447                 return PCI_ERS_RESULT_DISCONNECT;
2448
2449         if (netif_running(netdev))
2450                 atl1e_down(adapter);
2451
2452         pci_disable_device(pdev);
2453
2454         /* Request a slot slot reset. */
2455         return PCI_ERS_RESULT_NEED_RESET;
2456 }
2457
2458 /*
2459  * atl1e_io_slot_reset - called after the pci bus has been reset.
2460  * @pdev: Pointer to PCI device
2461  *
2462  * Restart the card from scratch, as if from a cold-boot. Implementation
2463  * resembles the first-half of the e1000_resume routine.
2464  */
2465 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2466 {
2467         struct net_device *netdev = pci_get_drvdata(pdev);
2468         struct atl1e_adapter *adapter = netdev_priv(netdev);
2469
2470         if (pci_enable_device(pdev)) {
2471                 netdev_err(adapter->netdev,
2472                            "Cannot re-enable PCI device after reset\n");
2473                 return PCI_ERS_RESULT_DISCONNECT;
2474         }
2475         pci_set_master(pdev);
2476
2477         pci_enable_wake(pdev, PCI_D3hot, 0);
2478         pci_enable_wake(pdev, PCI_D3cold, 0);
2479
2480         atl1e_reset_hw(&adapter->hw);
2481
2482         return PCI_ERS_RESULT_RECOVERED;
2483 }
2484
2485 /*
2486  * atl1e_io_resume - called when traffic can start flowing again.
2487  * @pdev: Pointer to PCI device
2488  *
2489  * This callback is called when the error recovery driver tells us that
2490  * its OK to resume normal operation. Implementation resembles the
2491  * second-half of the atl1e_resume routine.
2492  */
2493 static void atl1e_io_resume(struct pci_dev *pdev)
2494 {
2495         struct net_device *netdev = pci_get_drvdata(pdev);
2496         struct atl1e_adapter *adapter = netdev_priv(netdev);
2497
2498         if (netif_running(netdev)) {
2499                 if (atl1e_up(adapter)) {
2500                         netdev_err(adapter->netdev,
2501                                    "can't bring device back up after reset\n");
2502                         return;
2503                 }
2504         }
2505
2506         netif_device_attach(netdev);
2507 }
2508
2509 static struct pci_error_handlers atl1e_err_handler = {
2510         .error_detected = atl1e_io_error_detected,
2511         .slot_reset = atl1e_io_slot_reset,
2512         .resume = atl1e_io_resume,
2513 };
2514
2515 static struct pci_driver atl1e_driver = {
2516         .name     = atl1e_driver_name,
2517         .id_table = atl1e_pci_tbl,
2518         .probe    = atl1e_probe,
2519         .remove   = __devexit_p(atl1e_remove),
2520         /* Power Managment Hooks */
2521 #ifdef CONFIG_PM
2522         .suspend  = atl1e_suspend,
2523         .resume   = atl1e_resume,
2524 #endif
2525         .shutdown = atl1e_shutdown,
2526         .err_handler = &atl1e_err_handler
2527 };
2528
2529 /*
2530  * atl1e_init_module - Driver Registration Routine
2531  *
2532  * atl1e_init_module is the first routine called when the driver is
2533  * loaded. All it does is register with the PCI subsystem.
2534  */
2535 static int __init atl1e_init_module(void)
2536 {
2537         return pci_register_driver(&atl1e_driver);
2538 }
2539
2540 /*
2541  * atl1e_exit_module - Driver Exit Cleanup Routine
2542  *
2543  * atl1e_exit_module is called just before the driver is removed
2544  * from memory.
2545  */
2546 static void __exit atl1e_exit_module(void)
2547 {
2548         pci_unregister_driver(&atl1e_driver);
2549 }
2550
2551 module_init(atl1e_init_module);
2552 module_exit(atl1e_exit_module);