drivers/net/ethernet/atheros/atl1e/atl1e_main.c

   1 /*
   2  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1e.h"
  23
  24 #define DRV_VERSION "1.0.0.7-NAPI"
  25
  26 char atl1e_driver_name[] = "ATL1E";
  27 char atl1e_driver_version[] = DRV_VERSION;
  28 #define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
  29 /*
  30  * atl1e_pci_tbl - PCI Device ID Table
  31  *
  32  * Wildcard entries (PCI_ANY_ID) should come last
  33  * Last entry must be all 0s
  34  *
  35  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  36  *   Class, Class Mask, private data (not used) }
  37  */
  38 static DEFINE_PCI_DEVICE_TABLE(atl1e_pci_tbl) = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  45
  46 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(DRV_VERSION);
  50
  51 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  52
  53 static const u16
  54 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  55 {
  56         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  57         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  58         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  59         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  60 };
  61
  62 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  63 {
  64         REG_RXF0_BASE_ADDR_HI,
  65         REG_RXF1_BASE_ADDR_HI,
  66         REG_RXF2_BASE_ADDR_HI,
  67         REG_RXF3_BASE_ADDR_HI
  68 };
  69
  70 static const u16
  71 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  72 {
  73         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  74         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  75         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  76         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  77 };
  78
  79 static const u16
  80 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  81 {
  82         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  83         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  84         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  85         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  86 };
  87
  88 static const u16 atl1e_pay_load_size[] = {
  89         128, 256, 512, 1024, 2048, 4096,
  90 };
  91
  92 /**
  93  * atl1e_irq_enable - Enable default interrupt generation settings
  94  * @adapter: board private structure
  95  */
  96 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  97 {
  98         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  99                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 100                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
 101                 AT_WRITE_FLUSH(&adapter->hw);
 102         }
 103 }
 104
 105 /**
 106  * atl1e_irq_disable - Mask off interrupt generation on the NIC
 107  * @adapter: board private structure
 108  */
 109 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
 110 {
 111         atomic_inc(&adapter->irq_sem);
 112         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 113         AT_WRITE_FLUSH(&adapter->hw);
 114         synchronize_irq(adapter->pdev->irq);
 115 }
 116
 117 /**
 118  * atl1e_irq_reset - reset interrupt confiure on the NIC
 119  * @adapter: board private structure
 120  */
 121 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 122 {
 123         atomic_set(&adapter->irq_sem, 0);
 124         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 125         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 126         AT_WRITE_FLUSH(&adapter->hw);
 127 }
 128
 129 /**
 130  * atl1e_phy_config - Timer Call-back
 131  * @data: pointer to netdev cast into an unsigned long
 132  */
 133 static void atl1e_phy_config(unsigned long data)
 134 {
 135         struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
 136         struct atl1e_hw *hw = &adapter->hw;
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&adapter->mdio_lock, flags);
 140         atl1e_restart_autoneg(hw);
 141         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 142 }
 143
 144 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 145 {
 146
 147         WARN_ON(in_interrupt());
 148         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 149                 msleep(1);
 150         atl1e_down(adapter);
 151         atl1e_up(adapter);
 152         clear_bit(__AT_RESETTING, &adapter->flags);
 153 }
 154
 155 static void atl1e_reset_task(struct work_struct *work)
 156 {
 157         struct atl1e_adapter *adapter;
 158         adapter = container_of(work, struct atl1e_adapter, reset_task);
 159
 160         atl1e_reinit_locked(adapter);
 161 }
 162
 163 static int atl1e_check_link(struct atl1e_adapter *adapter)
 164 {
 165         struct atl1e_hw *hw = &adapter->hw;
 166         struct net_device *netdev = adapter->netdev;
 167         int err = 0;
 168         u16 speed, duplex, phy_data;
 169
 170         /* MII_BMSR must read twice */
 171         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 172         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 173         if ((phy_data & BMSR_LSTATUS) == 0) {
 174                 /* link down */
 175                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 176                         u32 value;
 177                         /* disable rx */
 178                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 179                         value &= ~MAC_CTRL_RX_EN;
 180                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 181                         adapter->link_speed = SPEED_0;
 182                         netif_carrier_off(netdev);
 183                         netif_stop_queue(netdev);
 184                 }
 185         } else {
 186                 /* Link Up */
 187                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 188                 if (unlikely(err))
 189                         return err;
 190
 191                 /* link result is our setting */
 192                 if (adapter->link_speed != speed ||
 193                     adapter->link_duplex != duplex) {
 194                         adapter->link_speed  = speed;
 195                         adapter->link_duplex = duplex;
 196                         atl1e_setup_mac_ctrl(adapter);
 197                         netdev_info(netdev,
 198                                     "NIC Link is Up <%d Mbps %s Duplex>\n",
 199                                     adapter->link_speed,
 200                                     adapter->link_duplex == FULL_DUPLEX ?
 201                                     "Full" : "Half");
 202                 }
 203
 204                 if (!netif_carrier_ok(netdev)) {
 205                         /* Link down -> Up */
 206                         netif_carrier_on(netdev);
 207                         netif_wake_queue(netdev);
 208                 }
 209         }
 210         return 0;
 211 }
 212
 213 /**
 214  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 215  * @netdev: network interface device structure
 216  */
 217 static void atl1e_link_chg_task(struct work_struct *work)
 218 {
 219         struct atl1e_adapter *adapter;
 220         unsigned long flags;
 221
 222         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 223         spin_lock_irqsave(&adapter->mdio_lock, flags);
 224         atl1e_check_link(adapter);
 225         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 226 }
 227
 228 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 229 {
 230         struct net_device *netdev = adapter->netdev;
 231         u16 phy_data = 0;
 232         u16 link_up = 0;
 233
 234         spin_lock(&adapter->mdio_lock);
 235         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 236         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 237         spin_unlock(&adapter->mdio_lock);
 238         link_up = phy_data & BMSR_LSTATUS;
 239         /* notify upper layer link down ASAP */
 240         if (!link_up) {
 241                 if (netif_carrier_ok(netdev)) {
 242                         /* old link state: Up */
 243                         netdev_info(netdev, "NIC Link is Down\n");
 244                         adapter->link_speed = SPEED_0;
 245                         netif_stop_queue(netdev);
 246                 }
 247         }
 248         schedule_work(&adapter->link_chg_task);
 249 }
 250
 251 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 252 {
 253         del_timer_sync(&adapter->phy_config_timer);
 254 }
 255
 256 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 257 {
 258         cancel_work_sync(&adapter->reset_task);
 259         cancel_work_sync(&adapter->link_chg_task);
 260 }
 261
 262 /**
 263  * atl1e_tx_timeout - Respond to a Tx Hang
 264  * @netdev: network interface device structure
 265  */
 266 static void atl1e_tx_timeout(struct net_device *netdev)
 267 {
 268         struct atl1e_adapter *adapter = netdev_priv(netdev);
 269
 270         /* Do the reset outside of interrupt context */
 271         schedule_work(&adapter->reset_task);
 272 }
 273
 274 /**
 275  * atl1e_set_multi - Multicast and Promiscuous mode set
 276  * @netdev: network interface device structure
 277  *
 278  * The set_multi entry point is called whenever the multicast address
 279  * list or the network interface flags are updated.  This routine is
 280  * responsible for configuring the hardware for proper multicast,
 281  * promiscuous mode, and all-multi behavior.
 282  */
 283 static void atl1e_set_multi(struct net_device *netdev)
 284 {
 285         struct atl1e_adapter *adapter = netdev_priv(netdev);
 286         struct atl1e_hw *hw = &adapter->hw;
 287         struct netdev_hw_addr *ha;
 288         u32 mac_ctrl_data = 0;
 289         u32 hash_value;
 290
 291         /* Check for Promiscuous and All Multicast modes */
 292         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 293
 294         if (netdev->flags & IFF_PROMISC) {
 295                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 296         } else if (netdev->flags & IFF_ALLMULTI) {
 297                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 298                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 299         } else {
 300                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 301         }
 302
 303         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 304
 305         /* clear the old settings from the multicast hash table */
 306         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 307         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 308
 309         /* comoute mc addresses' hash value ,and put it into hash table */
 310         netdev_for_each_mc_addr(ha, netdev) {
 311                 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 312                 atl1e_hash_set(hw, hash_value);
 313         }
 314 }
 315
 316 static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 317 {
 318         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 319                 /* enable VLAN tag insert/strip */
 320                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 321         } else {
 322                 /* disable VLAN tag insert/strip */
 323                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 324         }
 325 }
 326
 327 static void atl1e_vlan_mode(struct net_device *netdev,
 328         netdev_features_t features)
 329 {
 330         struct atl1e_adapter *adapter = netdev_priv(netdev);
 331         u32 mac_ctrl_data = 0;
 332
 333         netdev_dbg(adapter->netdev, "%s\n", __func__);
 334
 335         atl1e_irq_disable(adapter);
 336         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 337         __atl1e_vlan_mode(features, &mac_ctrl_data);
 338         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 339         atl1e_irq_enable(adapter);
 340 }
 341
 342 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 343 {
 344         netdev_dbg(adapter->netdev, "%s\n", __func__);
 345         atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
 346 }
 347
 348 /**
 349  * atl1e_set_mac - Change the Ethernet Address of the NIC
 350  * @netdev: network interface device structure
 351  * @p: pointer to an address structure
 352  *
 353  * Returns 0 on success, negative on failure
 354  */
 355 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 356 {
 357         struct atl1e_adapter *adapter = netdev_priv(netdev);
 358         struct sockaddr *addr = p;
 359
 360         if (!is_valid_ether_addr(addr->sa_data))
 361                 return -EADDRNOTAVAIL;
 362
 363         if (netif_running(netdev))
 364                 return -EBUSY;
 365
 366         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 367         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 368
 369         atl1e_hw_set_mac_addr(&adapter->hw);
 370
 371         return 0;
 372 }
 373
 374 static netdev_features_t atl1e_fix_features(struct net_device *netdev,
 375         netdev_features_t features)
 376 {
 377         /*
 378          * Since there is no support for separate rx/tx vlan accel
 379          * enable/disable make sure tx flag is always in same state as rx.
 380          */
 381         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 382                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 383         else
 384                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 385
 386         return features;
 387 }
 388
 389 static int atl1e_set_features(struct net_device *netdev,
 390         netdev_features_t features)
 391 {
 392         netdev_features_t changed = netdev->features ^ features;
 393
 394         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 395                 atl1e_vlan_mode(netdev, features);
 396
 397         return 0;
 398 }
 399
 400 /**
 401  * atl1e_change_mtu - Change the Maximum Transfer Unit
 402  * @netdev: network interface device structure
 403  * @new_mtu: new value for maximum frame size
 404  *
 405  * Returns 0 on success, negative on failure
 406  */
 407 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 408 {
 409         struct atl1e_adapter *adapter = netdev_priv(netdev);
 410         int old_mtu   = netdev->mtu;
 411         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 412
 413         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 414                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 415                 netdev_warn(adapter->netdev, "invalid MTU setting\n");
 416                 return -EINVAL;
 417         }
 418         /* set MTU */
 419         if (old_mtu != new_mtu && netif_running(netdev)) {
 420                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 421                         msleep(1);
 422                 netdev->mtu = new_mtu;
 423                 adapter->hw.max_frame_size = new_mtu;
 424                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 425                 atl1e_down(adapter);
 426                 atl1e_up(adapter);
 427                 clear_bit(__AT_RESETTING, &adapter->flags);
 428         }
 429         return 0;
 430 }
 431
 432 /*
 433  *  caller should hold mdio_lock
 434  */
 435 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 436 {
 437         struct atl1e_adapter *adapter = netdev_priv(netdev);
 438         u16 result;
 439
 440         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 441         return result;
 442 }
 443
 444 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 445                              int reg_num, int val)
 446 {
 447         struct atl1e_adapter *adapter = netdev_priv(netdev);
 448
 449         atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 450 }
 451
 452 static int atl1e_mii_ioctl(struct net_device *netdev,
 453                            struct ifreq *ifr, int cmd)
 454 {
 455         struct atl1e_adapter *adapter = netdev_priv(netdev);
 456         struct mii_ioctl_data *data = if_mii(ifr);
 457         unsigned long flags;
 458         int retval = 0;
 459
 460         if (!netif_running(netdev))
 461                 return -EINVAL;
 462
 463         spin_lock_irqsave(&adapter->mdio_lock, flags);
 464         switch (cmd) {
 465         case SIOCGMIIPHY:
 466                 data->phy_id = 0;
 467                 break;
 468
 469         case SIOCGMIIREG:
 470                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 471                                     &data->val_out)) {
 472                         retval = -EIO;
 473                         goto out;
 474                 }
 475                 break;
 476
 477         case SIOCSMIIREG:
 478                 if (data->reg_num & ~(0x1F)) {
 479                         retval = -EFAULT;
 480                         goto out;
 481                 }
 482
 483                 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 484                            data->reg_num, data->val_in);
 485                 if (atl1e_write_phy_reg(&adapter->hw,
 486                                      data->reg_num, data->val_in)) {
 487                         retval = -EIO;
 488                         goto out;
 489                 }
 490                 break;
 491
 492         default:
 493                 retval = -EOPNOTSUPP;
 494                 break;
 495         }
 496 out:
 497         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 498         return retval;
 499
 500 }
 501
 502 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 503 {
 504         switch (cmd) {
 505         case SIOCGMIIPHY:
 506         case SIOCGMIIREG:
 507         case SIOCSMIIREG:
 508                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 509         default:
 510                 return -EOPNOTSUPP;
 511         }
 512 }
 513
 514 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 515 {
 516         u16 cmd;
 517
 518         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 519         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 520         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 521         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 522
 523         /*
 524          * some motherboards BIOS(PXE/EFI) driver may set PME
 525          * while they transfer control to OS (Windows/Linux)
 526          * so we should clear this bit before NIC work normally
 527          */
 528         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 529         msleep(1);
 530 }
 531
 532 /**
 533  * atl1e_alloc_queues - Allocate memory for all rings
 534  * @adapter: board private structure to initialize
 535  *
 536  */
 537 static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
 538 {
 539         return 0;
 540 }
 541
 542 /**
 543  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 544  * @adapter: board private structure to initialize
 545  *
 546  * atl1e_sw_init initializes the Adapter private data structure.
 547  * Fields are initialized based on PCI device information and
 548  * OS network device settings (MTU size).
 549  */
 550 static int atl1e_sw_init(struct atl1e_adapter *adapter)
 551 {
 552         struct atl1e_hw *hw   = &adapter->hw;
 553         struct pci_dev  *pdev = adapter->pdev;
 554         u32 phy_status_data = 0;
 555
 556         adapter->wol = 0;
 557         adapter->link_speed = SPEED_0;   /* hardware init */
 558         adapter->link_duplex = FULL_DUPLEX;
 559         adapter->num_rx_queues = 1;
 560
 561         /* PCI config space info */
 562         hw->vendor_id = pdev->vendor;
 563         hw->device_id = pdev->device;
 564         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 565         hw->subsystem_id = pdev->subsystem_device;
 566         hw->revision_id  = pdev->revision;
 567
 568         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 569
 570         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 571         /* nic type */
 572         if (hw->revision_id >= 0xF0) {
 573                 hw->nic_type = athr_l2e_revB;
 574         } else {
 575                 if (phy_status_data & PHY_STATUS_100M)
 576                         hw->nic_type = athr_l1e;
 577                 else
 578                         hw->nic_type = athr_l2e_revA;
 579         }
 580
 581         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 582
 583         if (phy_status_data & PHY_STATUS_EMI_CA)
 584                 hw->emi_ca = true;
 585         else
 586                 hw->emi_ca = false;
 587
 588         hw->phy_configured = false;
 589         hw->preamble_len = 7;
 590         hw->max_frame_size = adapter->netdev->mtu;
 591         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 592                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 593
 594         hw->rrs_type = atl1e_rrs_disable;
 595         hw->indirect_tab = 0;
 596         hw->base_cpu = 0;
 597
 598         /* need confirm */
 599
 600         hw->ict = 50000;                 /* 100ms */
 601         hw->smb_timer = 200000;          /* 200ms  */
 602         hw->tpd_burst = 5;
 603         hw->rrd_thresh = 1;
 604         hw->tpd_thresh = adapter->tx_ring.count / 2;
 605         hw->rx_count_down = 4;  /* 2us resolution */
 606         hw->tx_count_down = hw->imt * 4 / 3;
 607         hw->dmar_block = atl1e_dma_req_1024;
 608         hw->dmaw_block = atl1e_dma_req_1024;
 609         hw->dmar_dly_cnt = 15;
 610         hw->dmaw_dly_cnt = 4;
 611
 612         if (atl1e_alloc_queues(adapter)) {
 613                 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 614                 return -ENOMEM;
 615         }
 616
 617         atomic_set(&adapter->irq_sem, 1);
 618         spin_lock_init(&adapter->mdio_lock);
 619         spin_lock_init(&adapter->tx_lock);
 620
 621         set_bit(__AT_DOWN, &adapter->flags);
 622
 623         return 0;
 624 }
 625
 626 /**
 627  * atl1e_clean_tx_ring - Free Tx-skb
 628  * @adapter: board private structure
 629  */
 630 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 631 {
 632         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 633         struct atl1e_tx_buffer *tx_buffer = NULL;
 634         struct pci_dev *pdev = adapter->pdev;
 635         u16 index, ring_count;
 636
 637         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 638                 return;
 639
 640         ring_count = tx_ring->count;
 641         /* first unmmap dma */
 642         for (index = 0; index < ring_count; index++) {
 643                 tx_buffer = &tx_ring->tx_buffer[index];
 644                 if (tx_buffer->dma) {
 645                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 646                                 pci_unmap_single(pdev, tx_buffer->dma,
 647                                         tx_buffer->length, PCI_DMA_TODEVICE);
 648                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 649                                 pci_unmap_page(pdev, tx_buffer->dma,
 650                                         tx_buffer->length, PCI_DMA_TODEVICE);
 651                         tx_buffer->dma = 0;
 652                 }
 653         }
 654         /* second free skb */
 655         for (index = 0; index < ring_count; index++) {
 656                 tx_buffer = &tx_ring->tx_buffer[index];
 657                 if (tx_buffer->skb) {
 658                         dev_kfree_skb_any(tx_buffer->skb);
 659                         tx_buffer->skb = NULL;
 660                 }
 661         }
 662         /* Zero out Tx-buffers */
 663         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 664                                 ring_count);
 665         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 666                                 ring_count);
 667 }
 668
 669 /**
 670  * atl1e_clean_rx_ring - Free rx-reservation skbs
 671  * @adapter: board private structure
 672  */
 673 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 674 {
 675         struct atl1e_rx_ring *rx_ring =
 676                 &adapter->rx_ring;
 677         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 678         u16 i, j;
 679
 680
 681         if (adapter->ring_vir_addr == NULL)
 682                 return;
 683         /* Zero out the descriptor ring */
 684         for (i = 0; i < adapter->num_rx_queues; i++) {
 685                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 686                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 687                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 688                                                 rx_ring->real_page_size);
 689                         }
 690                 }
 691         }
 692 }
 693
 694 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 695 {
 696         *ring_size = ((u32)(adapter->tx_ring.count *
 697                      sizeof(struct atl1e_tpd_desc) + 7
 698                         /* tx ring, qword align */
 699                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 700                         adapter->num_rx_queues + 31
 701                         /* rx ring,  32 bytes align */
 702                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 703                         sizeof(u32) + 3));
 704                         /* tx, rx cmd, dword align   */
 705 }
 706
 707 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 708 {
 709         struct atl1e_rx_ring *rx_ring = NULL;
 710
 711         rx_ring = &adapter->rx_ring;
 712
 713         rx_ring->real_page_size = adapter->rx_ring.page_size
 714                                  + adapter->hw.max_frame_size
 715                                  + ETH_HLEN + VLAN_HLEN
 716                                  + ETH_FCS_LEN;
 717         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 718         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 719
 720         adapter->ring_vir_addr = NULL;
 721         adapter->rx_ring.desc = NULL;
 722         rwlock_init(&adapter->tx_ring.tx_lock);
 723 }
 724
 725 /*
 726  * Read / Write Ptr Initialize:
 727  */
 728 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 729 {
 730         struct atl1e_tx_ring *tx_ring = NULL;
 731         struct atl1e_rx_ring *rx_ring = NULL;
 732         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 733         int i, j;
 734
 735         tx_ring = &adapter->tx_ring;
 736         rx_ring = &adapter->rx_ring;
 737         rx_page_desc = rx_ring->rx_page_desc;
 738
 739         tx_ring->next_to_use = 0;
 740         atomic_set(&tx_ring->next_to_clean, 0);
 741
 742         for (i = 0; i < adapter->num_rx_queues; i++) {
 743                 rx_page_desc[i].rx_using  = 0;
 744                 rx_page_desc[i].rx_nxseq = 0;
 745                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 746                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 747                         rx_page_desc[i].rx_page[j].read_offset = 0;
 748                 }
 749         }
 750 }
 751
 752 /**
 753  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 754  * @adapter: board private structure
 755  *
 756  * Free all transmit software resources
 757  */
 758 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 759 {
 760         struct pci_dev *pdev = adapter->pdev;
 761
 762         atl1e_clean_tx_ring(adapter);
 763         atl1e_clean_rx_ring(adapter);
 764
 765         if (adapter->ring_vir_addr) {
 766                 pci_free_consistent(pdev, adapter->ring_size,
 767                                 adapter->ring_vir_addr, adapter->ring_dma);
 768                 adapter->ring_vir_addr = NULL;
 769         }
 770
 771         if (adapter->tx_ring.tx_buffer) {
 772                 kfree(adapter->tx_ring.tx_buffer);
 773                 adapter->tx_ring.tx_buffer = NULL;
 774         }
 775 }
 776
 777 /**
 778  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 779  * @adapter: board private structure
 780  *
 781  * Return 0 on success, negative on failure
 782  */
 783 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 784 {
 785         struct pci_dev *pdev = adapter->pdev;
 786         struct atl1e_tx_ring *tx_ring;
 787         struct atl1e_rx_ring *rx_ring;
 788         struct atl1e_rx_page_desc  *rx_page_desc;
 789         int size, i, j;
 790         u32 offset = 0;
 791         int err = 0;
 792
 793         if (adapter->ring_vir_addr != NULL)
 794                 return 0; /* alloced already */
 795
 796         tx_ring = &adapter->tx_ring;
 797         rx_ring = &adapter->rx_ring;
 798
 799         /* real ring DMA buffer */
 800
 801         size = adapter->ring_size;
 802         adapter->ring_vir_addr = pci_alloc_consistent(pdev,
 803                         adapter->ring_size, &adapter->ring_dma);
 804
 805         if (adapter->ring_vir_addr == NULL) {
 806                 netdev_err(adapter->netdev,
 807                            "pci_alloc_consistent failed, size = D%d\n", size);
 808                 return -ENOMEM;
 809         }
 810
 811         memset(adapter->ring_vir_addr, 0, adapter->ring_size);
 812
 813         rx_page_desc = rx_ring->rx_page_desc;
 814
 815         /* Init TPD Ring */
 816         tx_ring->dma = roundup(adapter->ring_dma, 8);
 817         offset = tx_ring->dma - adapter->ring_dma;
 818         tx_ring->desc = adapter->ring_vir_addr + offset;
 819         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 820         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 821         if (tx_ring->tx_buffer == NULL) {
 822                 err = -ENOMEM;
 823                 goto failed;
 824         }
 825
 826         /* Init RXF-Pages */
 827         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 828         offset = roundup(offset, 32);
 829
 830         for (i = 0; i < adapter->num_rx_queues; i++) {
 831                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 832                         rx_page_desc[i].rx_page[j].dma =
 833                                 adapter->ring_dma + offset;
 834                         rx_page_desc[i].rx_page[j].addr =
 835                                 adapter->ring_vir_addr + offset;
 836                         offset += rx_ring->real_page_size;
 837                 }
 838         }
 839
 840         /* Init CMB dma address */
 841         tx_ring->cmb_dma = adapter->ring_dma + offset;
 842         tx_ring->cmb = adapter->ring_vir_addr + offset;
 843         offset += sizeof(u32);
 844
 845         for (i = 0; i < adapter->num_rx_queues; i++) {
 846                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 847                         rx_page_desc[i].rx_page[j].write_offset_dma =
 848                                 adapter->ring_dma + offset;
 849                         rx_page_desc[i].rx_page[j].write_offset_addr =
 850                                 adapter->ring_vir_addr + offset;
 851                         offset += sizeof(u32);
 852                 }
 853         }
 854
 855         if (unlikely(offset > adapter->ring_size)) {
 856                 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 857                            offset, adapter->ring_size);
 858                 err = -1;
 859                 goto failed;
 860         }
 861
 862         return 0;
 863 failed:
 864         if (adapter->ring_vir_addr != NULL) {
 865                 pci_free_consistent(pdev, adapter->ring_size,
 866                                 adapter->ring_vir_addr, adapter->ring_dma);
 867                 adapter->ring_vir_addr = NULL;
 868         }
 869         return err;
 870 }
 871
 872 static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
 873 {
 874
 875         struct atl1e_hw *hw = &adapter->hw;
 876         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
 877         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 878         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 879         int i, j;
 880
 881         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 882                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 883         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 884                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 885         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 886         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 887                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 888
 889         rx_page_desc = rx_ring->rx_page_desc;
 890         /* RXF Page Physical address / Page Length */
 891         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 892                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 893                                  (u32)((adapter->ring_dma &
 894                                  AT_DMA_HI_ADDR_MASK) >> 32));
 895                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 896                         u32 page_phy_addr;
 897                         u32 offset_phy_addr;
 898
 899                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 900                         offset_phy_addr =
 901                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 902
 903                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 904                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 905                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 906                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 907                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 908                 }
 909         }
 910         /* Page Length */
 911         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 912         /* Load all of base address above */
 913         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 914 }
 915
 916 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 917 {
 918         struct atl1e_hw *hw = &adapter->hw;
 919         u32 dev_ctrl_data = 0;
 920         u32 max_pay_load = 0;
 921         u32 jumbo_thresh = 0;
 922         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 923
 924         /* configure TXQ param */
 925         if (hw->nic_type != athr_l2e_revB) {
 926                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 927                 if (hw->max_frame_size <= 1500) {
 928                         jumbo_thresh = hw->max_frame_size + extra_size;
 929                 } else if (hw->max_frame_size < 6*1024) {
 930                         jumbo_thresh =
 931                                 (hw->max_frame_size + extra_size) * 2 / 3;
 932                 } else {
 933                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 934                 }
 935                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 936         }
 937
 938         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 939
 940         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 941                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 942
 943         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 944
 945         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 946                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 947         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 948
 949         if (hw->nic_type != athr_l2e_revB)
 950                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 951                               atl1e_pay_load_size[hw->dmar_block]);
 952         /* enable TXQ */
 953         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 954                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 955                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 956                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 957 }
 958
 959 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 960 {
 961         struct atl1e_hw *hw = &adapter->hw;
 962         u32 rxf_len  = 0;
 963         u32 rxf_low  = 0;
 964         u32 rxf_high = 0;
 965         u32 rxf_thresh_data = 0;
 966         u32 rxq_ctrl_data = 0;
 967
 968         if (hw->nic_type != athr_l2e_revB) {
 969                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 970                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 971                               RXQ_JMBOSZ_TH_SHIFT |
 972                               (1 & RXQ_JMBO_LKAH_MASK) <<
 973                               RXQ_JMBO_LKAH_SHIFT));
 974
 975                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 976                 rxf_high = rxf_len * 4 / 5;
 977                 rxf_low  = rxf_len / 5;
 978                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 979                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 980                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 981                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 982
 983                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 984         }
 985
 986         /* RRS */
 987         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
 988         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
 989
 990         if (hw->rrs_type & atl1e_rrs_ipv4)
 991                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
 992
 993         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
 994                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
 995
 996         if (hw->rrs_type & atl1e_rrs_ipv6)
 997                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
 998
 999         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1000                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1001
1002         if (hw->rrs_type != atl1e_rrs_disable)
1003                 rxq_ctrl_data |=
1004                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1005
1006         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1007                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1008
1009         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1010 }
1011
1012 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1013 {
1014         struct atl1e_hw *hw = &adapter->hw;
1015         u32 dma_ctrl_data = 0;
1016
1017         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1018         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1019                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1020         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1021                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1022         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1023         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1024                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1025         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1026                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1027
1028         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1029 }
1030
1031 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1032 {
1033         u32 value;
1034         struct atl1e_hw *hw = &adapter->hw;
1035         struct net_device *netdev = adapter->netdev;
1036
1037         /* Config MAC CTRL Register */
1038         value = MAC_CTRL_TX_EN |
1039                 MAC_CTRL_RX_EN ;
1040
1041         if (FULL_DUPLEX == adapter->link_duplex)
1042                 value |= MAC_CTRL_DUPLX;
1043
1044         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1045                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1046                           MAC_CTRL_SPEED_SHIFT);
1047         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1048
1049         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1050         value |= (((u32)adapter->hw.preamble_len &
1051                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1052
1053         __atl1e_vlan_mode(netdev->features, &value);
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 = &adapter->tx_ring;
1211         struct atl1e_tx_buffer *tx_buffer = NULL;
1212         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1213         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1214
1215         while (next_to_clean != hw_next_to_clean) {
1216                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1217                 if (tx_buffer->dma) {
1218                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1219                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1220                                         tx_buffer->length, PCI_DMA_TODEVICE);
1221                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1222                                 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1223                                         tx_buffer->length, PCI_DMA_TODEVICE);
1224                         tx_buffer->dma = 0;
1225                 }
1226
1227                 if (tx_buffer->skb) {
1228                         dev_kfree_skb_irq(tx_buffer->skb);
1229                         tx_buffer->skb = NULL;
1230                 }
1231
1232                 if (++next_to_clean == tx_ring->count)
1233                         next_to_clean = 0;
1234         }
1235
1236         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1237
1238         if (netif_queue_stopped(adapter->netdev) &&
1239                         netif_carrier_ok(adapter->netdev)) {
1240                 netif_wake_queue(adapter->netdev);
1241         }
1242
1243         return true;
1244 }
1245
1246 /**
1247  * atl1e_intr - Interrupt Handler
1248  * @irq: interrupt number
1249  * @data: pointer to a network interface device structure
1250  */
1251 static irqreturn_t atl1e_intr(int irq, void *data)
1252 {
1253         struct net_device *netdev  = data;
1254         struct atl1e_adapter *adapter = netdev_priv(netdev);
1255         struct atl1e_hw *hw = &adapter->hw;
1256         int max_ints = AT_MAX_INT_WORK;
1257         int handled = IRQ_NONE;
1258         u32 status;
1259
1260         do {
1261                 status = AT_READ_REG(hw, REG_ISR);
1262                 if ((status & IMR_NORMAL_MASK) == 0 ||
1263                                 (status & ISR_DIS_INT) != 0) {
1264                         if (max_ints != AT_MAX_INT_WORK)
1265                                 handled = IRQ_HANDLED;
1266                         break;
1267                 }
1268                 /* link event */
1269                 if (status & ISR_GPHY)
1270                         atl1e_clear_phy_int(adapter);
1271                 /* Ack ISR */
1272                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1273
1274                 handled = IRQ_HANDLED;
1275                 /* check if PCIE PHY Link down */
1276                 if (status & ISR_PHY_LINKDOWN) {
1277                         netdev_err(adapter->netdev,
1278                                    "pcie phy linkdown %x\n", status);
1279                         if (netif_running(adapter->netdev)) {
1280                                 /* reset MAC */
1281                                 atl1e_irq_reset(adapter);
1282                                 schedule_work(&adapter->reset_task);
1283                                 break;
1284                         }
1285                 }
1286
1287                 /* check if DMA read/write error */
1288                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1289                         netdev_err(adapter->netdev,
1290                                    "PCIE DMA RW error (status = 0x%x)\n",
1291                                    status);
1292                         atl1e_irq_reset(adapter);
1293                         schedule_work(&adapter->reset_task);
1294                         break;
1295                 }
1296
1297                 if (status & ISR_SMB)
1298                         atl1e_update_hw_stats(adapter);
1299
1300                 /* link event */
1301                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1302                         netdev->stats.tx_carrier_errors++;
1303                         atl1e_link_chg_event(adapter);
1304                         break;
1305                 }
1306
1307                 /* transmit event */
1308                 if (status & ISR_TX_EVENT)
1309                         atl1e_clean_tx_irq(adapter);
1310
1311                 if (status & ISR_RX_EVENT) {
1312                         /*
1313                          * disable rx interrupts, without
1314                          * the synchronize_irq bit
1315                          */
1316                         AT_WRITE_REG(hw, REG_IMR,
1317                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1318                         AT_WRITE_FLUSH(hw);
1319                         if (likely(napi_schedule_prep(
1320                                    &adapter->napi)))
1321                                 __napi_schedule(&adapter->napi);
1322                 }
1323         } while (--max_ints > 0);
1324         /* re-enable Interrupt*/
1325         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1326
1327         return handled;
1328 }
1329
1330 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1331                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1332 {
1333         u8 *packet = (u8 *)(prrs + 1);
1334         struct iphdr *iph;
1335         u16 head_len = ETH_HLEN;
1336         u16 pkt_flags;
1337         u16 err_flags;
1338
1339         skb_checksum_none_assert(skb);
1340         pkt_flags = prrs->pkt_flag;
1341         err_flags = prrs->err_flag;
1342         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1343                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1344                 if (pkt_flags & RRS_IS_IPV4) {
1345                         if (pkt_flags & RRS_IS_802_3)
1346                                 head_len += 8;
1347                         iph = (struct iphdr *) (packet + head_len);
1348                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1349                                 goto hw_xsum;
1350                 }
1351                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1352                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1353                         return;
1354                 }
1355         }
1356
1357 hw_xsum :
1358         return;
1359 }
1360
1361 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1362                                                u8 que)
1363 {
1364         struct atl1e_rx_page_desc *rx_page_desc =
1365                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1366         u8 rx_using = rx_page_desc[que].rx_using;
1367
1368         return &(rx_page_desc[que].rx_page[rx_using]);
1369 }
1370
1371 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1372                    int *work_done, int work_to_do)
1373 {
1374         struct net_device *netdev  = adapter->netdev;
1375         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1376         struct atl1e_rx_page_desc *rx_page_desc =
1377                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1378         struct sk_buff *skb = NULL;
1379         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1380         u32 packet_size, write_offset;
1381         struct atl1e_recv_ret_status *prrs;
1382
1383         write_offset = *(rx_page->write_offset_addr);
1384         if (likely(rx_page->read_offset < write_offset)) {
1385                 do {
1386                         if (*work_done >= work_to_do)
1387                                 break;
1388                         (*work_done)++;
1389                         /* get new packet's  rrs */
1390                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1391                                                  rx_page->read_offset);
1392                         /* check sequence number */
1393                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1394                                 netdev_err(netdev,
1395                                            "rx sequence number error (rx=%d) (expect=%d)\n",
1396                                            prrs->seq_num,
1397                                            rx_page_desc[que].rx_nxseq);
1398                                 rx_page_desc[que].rx_nxseq++;
1399                                 /* just for debug use */
1400                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1401                                              (((u32)prrs->seq_num) << 16) |
1402                                              rx_page_desc[que].rx_nxseq);
1403                                 goto fatal_err;
1404                         }
1405                         rx_page_desc[que].rx_nxseq++;
1406
1407                         /* error packet */
1408                         if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
1409                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1410                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1411                                         RRS_ERR_TRUNC)) {
1412                                 /* hardware error, discard this packet*/
1413                                         netdev_err(netdev,
1414                                                    "rx packet desc error %x\n",
1415                                                    *((u32 *)prrs + 1));
1416                                         goto skip_pkt;
1417                                 }
1418                         }
1419
1420                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1421                                         RRS_PKT_SIZE_MASK) - 4; /* CRC */
1422                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1423                         if (skb == NULL)
1424                                 goto skip_pkt;
1425
1426                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1427                         skb_put(skb, packet_size);
1428                         skb->protocol = eth_type_trans(skb, netdev);
1429                         atl1e_rx_checksum(adapter, skb, prrs);
1430
1431                         if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1432                                 u16 vlan_tag = (prrs->vtag >> 4) |
1433                                                ((prrs->vtag & 7) << 13) |
1434                                                ((prrs->vtag & 8) << 9);
1435                                 netdev_dbg(netdev,
1436                                            "RXD VLAN TAG<RRD>=0x%04x\n",
1437                                            prrs->vtag);
1438                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1439                         }
1440                         netif_receive_skb(skb);
1441
1442 skip_pkt:
1443         /* skip current packet whether it's ok or not. */
1444                         rx_page->read_offset +=
1445                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1446                                 RRS_PKT_SIZE_MASK) +
1447                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1448                                                 0xFFFFFFE0);
1449
1450                         if (rx_page->read_offset >= rx_ring->page_size) {
1451                                 /* mark this page clean */
1452                                 u16 reg_addr;
1453                                 u8  rx_using;
1454
1455                                 rx_page->read_offset =
1456                                         *(rx_page->write_offset_addr) = 0;
1457                                 rx_using = rx_page_desc[que].rx_using;
1458                                 reg_addr =
1459                                         atl1e_rx_page_vld_regs[que][rx_using];
1460                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1461                                 rx_page_desc[que].rx_using ^= 1;
1462                                 rx_page = atl1e_get_rx_page(adapter, que);
1463                         }
1464                         write_offset = *(rx_page->write_offset_addr);
1465                 } while (rx_page->read_offset < write_offset);
1466         }
1467
1468         return;
1469
1470 fatal_err:
1471         if (!test_bit(__AT_DOWN, &adapter->flags))
1472                 schedule_work(&adapter->reset_task);
1473 }
1474
1475 /**
1476  * atl1e_clean - NAPI Rx polling callback
1477  */
1478 static int atl1e_clean(struct napi_struct *napi, int budget)
1479 {
1480         struct atl1e_adapter *adapter =
1481                         container_of(napi, struct atl1e_adapter, napi);
1482         u32 imr_data;
1483         int work_done = 0;
1484
1485         /* Keep link state information with original netdev */
1486         if (!netif_carrier_ok(adapter->netdev))
1487                 goto quit_polling;
1488
1489         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1490
1491         /* If no Tx and not enough Rx work done, exit the polling mode */
1492         if (work_done < budget) {
1493 quit_polling:
1494                 napi_complete(napi);
1495                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1496                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1497                 /* test debug */
1498                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1499                         atomic_dec(&adapter->irq_sem);
1500                         netdev_err(adapter->netdev,
1501                                    "atl1e_clean is called when AT_DOWN\n");
1502                 }
1503                 /* reenable RX intr */
1504                 /*atl1e_irq_enable(adapter); */
1505
1506         }
1507         return work_done;
1508 }
1509
1510 #ifdef CONFIG_NET_POLL_CONTROLLER
1511
1512 /*
1513  * Polling 'interrupt' - used by things like netconsole to send skbs
1514  * without having to re-enable interrupts. It's not called while
1515  * the interrupt routine is executing.
1516  */
1517 static void atl1e_netpoll(struct net_device *netdev)
1518 {
1519         struct atl1e_adapter *adapter = netdev_priv(netdev);
1520
1521         disable_irq(adapter->pdev->irq);
1522         atl1e_intr(adapter->pdev->irq, netdev);
1523         enable_irq(adapter->pdev->irq);
1524 }
1525 #endif
1526
1527 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1528 {
1529         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1530         u16 next_to_use = 0;
1531         u16 next_to_clean = 0;
1532
1533         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1534         next_to_use   = tx_ring->next_to_use;
1535
1536         return (u16)(next_to_clean > next_to_use) ?
1537                 (next_to_clean - next_to_use - 1) :
1538                 (tx_ring->count + next_to_clean - next_to_use - 1);
1539 }
1540
1541 /*
1542  * get next usable tpd
1543  * Note: should call atl1e_tdp_avail to make sure
1544  * there is enough tpd to use
1545  */
1546 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1547 {
1548         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1549         u16 next_to_use = 0;
1550
1551         next_to_use = tx_ring->next_to_use;
1552         if (++tx_ring->next_to_use == tx_ring->count)
1553                 tx_ring->next_to_use = 0;
1554
1555         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1556         return &tx_ring->desc[next_to_use];
1557 }
1558
1559 static struct atl1e_tx_buffer *
1560 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1561 {
1562         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1563
1564         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1565 }
1566
1567 /* Calculate the transmit packet descript needed*/
1568 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1569 {
1570         int i = 0;
1571         u16 tpd_req = 1;
1572         u16 fg_size = 0;
1573         u16 proto_hdr_len = 0;
1574
1575         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1576                 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1577                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1578         }
1579
1580         if (skb_is_gso(skb)) {
1581                 if (skb->protocol == htons(ETH_P_IP) ||
1582                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1583                         proto_hdr_len = skb_transport_offset(skb) +
1584                                         tcp_hdrlen(skb);
1585                         if (proto_hdr_len < skb_headlen(skb)) {
1586                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1587                                            MAX_TX_BUF_LEN - 1) >>
1588                                            MAX_TX_BUF_SHIFT);
1589                         }
1590                 }
1591
1592         }
1593         return tpd_req;
1594 }
1595
1596 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1597                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1598 {
1599         u8 hdr_len;
1600         u32 real_len;
1601         unsigned short offload_type;
1602         int err;
1603
1604         if (skb_is_gso(skb)) {
1605                 if (skb_header_cloned(skb)) {
1606                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1607                         if (unlikely(err))
1608                                 return -1;
1609                 }
1610                 offload_type = skb_shinfo(skb)->gso_type;
1611
1612                 if (offload_type & SKB_GSO_TCPV4) {
1613                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1614                                         + ntohs(ip_hdr(skb)->tot_len));
1615
1616                         if (real_len < skb->len)
1617                                 pskb_trim(skb, real_len);
1618
1619                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1620                         if (unlikely(skb->len == hdr_len)) {
1621                                 /* only xsum need */
1622                                 netdev_warn(adapter->netdev,
1623                                             "IPV4 tso with zero data??\n");
1624                                 goto check_sum;
1625                         } else {
1626                                 ip_hdr(skb)->check = 0;
1627                                 ip_hdr(skb)->tot_len = 0;
1628                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1629                                                         ip_hdr(skb)->saddr,
1630                                                         ip_hdr(skb)->daddr,
1631                                                         0, IPPROTO_TCP, 0);
1632                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1633                                         TDP_V4_IPHL_MASK) <<
1634                                         TPD_V4_IPHL_SHIFT;
1635                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1636                                         TPD_TCPHDRLEN_MASK) <<
1637                                         TPD_TCPHDRLEN_SHIFT;
1638                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1639                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1640                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1641                         }
1642                         return 0;
1643                 }
1644         }
1645
1646 check_sum:
1647         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1648                 u8 css, cso;
1649
1650                 cso = skb_checksum_start_offset(skb);
1651                 if (unlikely(cso & 0x1)) {
1652                         netdev_err(adapter->netdev,
1653                                    "payload offset should not ant event number\n");
1654                         return -1;
1655                 } else {
1656                         css = cso + skb->csum_offset;
1657                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1658                                         TPD_PLOADOFFSET_SHIFT;
1659                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1660                                         TPD_CCSUMOFFSET_SHIFT;
1661                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1662                 }
1663         }
1664
1665         return 0;
1666 }
1667
1668 static void atl1e_tx_map(struct atl1e_adapter *adapter,
1669                       struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1670 {
1671         struct atl1e_tpd_desc *use_tpd = NULL;
1672         struct atl1e_tx_buffer *tx_buffer = NULL;
1673         u16 buf_len = skb_headlen(skb);
1674         u16 map_len = 0;
1675         u16 mapped_len = 0;
1676         u16 hdr_len = 0;
1677         u16 nr_frags;
1678         u16 f;
1679         int segment;
1680
1681         nr_frags = skb_shinfo(skb)->nr_frags;
1682         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1683         if (segment) {
1684                 /* TSO */
1685                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1686                 use_tpd = tpd;
1687
1688                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1689                 tx_buffer->length = map_len;
1690                 tx_buffer->dma = pci_map_single(adapter->pdev,
1691                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1692                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1693                 mapped_len += map_len;
1694                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1695                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1696                         ((cpu_to_le32(tx_buffer->length) &
1697                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1698         }
1699
1700         while (mapped_len < buf_len) {
1701                 /* mapped_len == 0, means we should use the first tpd,
1702                    which is given by caller  */
1703                 if (mapped_len == 0) {
1704                         use_tpd = tpd;
1705                 } else {
1706                         use_tpd = atl1e_get_tpd(adapter);
1707                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1708                 }
1709                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1710                 tx_buffer->skb = NULL;
1711
1712                 tx_buffer->length = map_len =
1713                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1714                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1715                 tx_buffer->dma =
1716                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1717                                         map_len, PCI_DMA_TODEVICE);
1718                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1719                 mapped_len  += map_len;
1720                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1721                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1722                         ((cpu_to_le32(tx_buffer->length) &
1723                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1724         }
1725
1726         for (f = 0; f < nr_frags; f++) {
1727                 const struct skb_frag_struct *frag;
1728                 u16 i;
1729                 u16 seg_num;
1730
1731                 frag = &skb_shinfo(skb)->frags[f];
1732                 buf_len = skb_frag_size(frag);
1733
1734                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1735                 for (i = 0; i < seg_num; i++) {
1736                         use_tpd = atl1e_get_tpd(adapter);
1737                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1738
1739                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1740                         BUG_ON(tx_buffer->skb);
1741
1742                         tx_buffer->skb = NULL;
1743                         tx_buffer->length =
1744                                 (buf_len > MAX_TX_BUF_LEN) ?
1745                                 MAX_TX_BUF_LEN : buf_len;
1746                         buf_len -= tx_buffer->length;
1747
1748                         tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1749                                                           frag,
1750                                                           (i * MAX_TX_BUF_LEN),
1751                                                           tx_buffer->length,
1752                                                           DMA_TO_DEVICE);
1753                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1754                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1755                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1756                                         ((cpu_to_le32(tx_buffer->length) &
1757                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1758                 }
1759         }
1760
1761         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1762                 /* note this one is a tcp header */
1763                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1764         /* The last tpd */
1765
1766         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1767         /* The last buffer info contain the skb address,
1768            so it will be free after unmap */
1769         tx_buffer->skb = skb;
1770 }
1771
1772 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1773                            struct atl1e_tpd_desc *tpd)
1774 {
1775         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1776         /* Force memory writes to complete before letting h/w
1777          * know there are new descriptors to fetch.  (Only
1778          * applicable for weak-ordered memory model archs,
1779          * such as IA-64). */
1780         wmb();
1781         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1782 }
1783
1784 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1785                                           struct net_device *netdev)
1786 {
1787         struct atl1e_adapter *adapter = netdev_priv(netdev);
1788         unsigned long flags;
1789         u16 tpd_req = 1;
1790         struct atl1e_tpd_desc *tpd;
1791
1792         if (test_bit(__AT_DOWN, &adapter->flags)) {
1793                 dev_kfree_skb_any(skb);
1794                 return NETDEV_TX_OK;
1795         }
1796
1797         if (unlikely(skb->len <= 0)) {
1798                 dev_kfree_skb_any(skb);
1799                 return NETDEV_TX_OK;
1800         }
1801         tpd_req = atl1e_cal_tdp_req(skb);
1802         if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1803                 return NETDEV_TX_LOCKED;
1804
1805         if (atl1e_tpd_avail(adapter) < tpd_req) {
1806                 /* no enough descriptor, just stop queue */
1807                 netif_stop_queue(netdev);
1808                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1809                 return NETDEV_TX_BUSY;
1810         }
1811
1812         tpd = atl1e_get_tpd(adapter);
1813
1814         if (vlan_tx_tag_present(skb)) {
1815                 u16 vlan_tag = vlan_tx_tag_get(skb);
1816                 u16 atl1e_vlan_tag;
1817
1818                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1819                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1820                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1821                                 TPD_VLAN_SHIFT;
1822         }
1823
1824         if (skb->protocol == htons(ETH_P_8021Q))
1825                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1826
1827         if (skb_network_offset(skb) != ETH_HLEN)
1828                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1829
1830         /* do TSO and check sum */
1831         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1832                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1833                 dev_kfree_skb_any(skb);
1834                 return NETDEV_TX_OK;
1835         }
1836
1837         atl1e_tx_map(adapter, skb, tpd);
1838         atl1e_tx_queue(adapter, tpd_req, tpd);
1839
1840         netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1841         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1842         return NETDEV_TX_OK;
1843 }
1844
1845 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1846 {
1847         struct net_device *netdev = adapter->netdev;
1848
1849         free_irq(adapter->pdev->irq, netdev);
1850 }
1851
1852 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1853 {
1854         struct pci_dev    *pdev   = adapter->pdev;
1855         struct net_device *netdev = adapter->netdev;
1856         int err = 0;
1857
1858         err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1859                           netdev);
1860         if (err) {
1861                 netdev_dbg(adapter->netdev,
1862                            "Unable to allocate interrupt Error: %d\n", err);
1863                 return err;
1864         }
1865         netdev_dbg(netdev, "atl1e_request_irq OK\n");
1866         return err;
1867 }
1868
1869 int atl1e_up(struct atl1e_adapter *adapter)
1870 {
1871         struct net_device *netdev = adapter->netdev;
1872         int err = 0;
1873         u32 val;
1874
1875         /* hardware has been reset, we need to reload some things */
1876         err = atl1e_init_hw(&adapter->hw);
1877         if (err) {
1878                 err = -EIO;
1879                 return err;
1880         }
1881         atl1e_init_ring_ptrs(adapter);
1882         atl1e_set_multi(netdev);
1883         atl1e_restore_vlan(adapter);
1884
1885         if (atl1e_configure(adapter)) {
1886                 err = -EIO;
1887                 goto err_up;
1888         }
1889
1890         clear_bit(__AT_DOWN, &adapter->flags);
1891         napi_enable(&adapter->napi);
1892         atl1e_irq_enable(adapter);
1893         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1894         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1895                       val | MASTER_CTRL_MANUAL_INT);
1896
1897 err_up:
1898         return err;
1899 }
1900
1901 void atl1e_down(struct atl1e_adapter *adapter)
1902 {
1903         struct net_device *netdev = adapter->netdev;
1904
1905         /* signal that we're down so the interrupt handler does not
1906          * reschedule our watchdog timer */
1907         set_bit(__AT_DOWN, &adapter->flags);
1908
1909         netif_stop_queue(netdev);
1910
1911         /* reset MAC to disable all RX/TX */
1912         atl1e_reset_hw(&adapter->hw);
1913         msleep(1);
1914
1915         napi_disable(&adapter->napi);
1916         atl1e_del_timer(adapter);
1917         atl1e_irq_disable(adapter);
1918
1919         netif_carrier_off(netdev);
1920         adapter->link_speed = SPEED_0;
1921         adapter->link_duplex = -1;
1922         atl1e_clean_tx_ring(adapter);
1923         atl1e_clean_rx_ring(adapter);
1924 }
1925
1926 /**
1927  * atl1e_open - Called when a network interface is made active
1928  * @netdev: network interface device structure
1929  *
1930  * Returns 0 on success, negative value on failure
1931  *
1932  * The open entry point is called when a network interface is made
1933  * active by the system (IFF_UP).  At this point all resources needed
1934  * for transmit and receive operations are allocated, the interrupt
1935  * handler is registered with the OS, the watchdog timer is started,
1936  * and the stack is notified that the interface is ready.
1937  */
1938 static int atl1e_open(struct net_device *netdev)
1939 {
1940         struct atl1e_adapter *adapter = netdev_priv(netdev);
1941         int err;
1942
1943         /* disallow open during test */
1944         if (test_bit(__AT_TESTING, &adapter->flags))
1945                 return -EBUSY;
1946
1947         /* allocate rx/tx dma buffer & descriptors */
1948         atl1e_init_ring_resources(adapter);
1949         err = atl1e_setup_ring_resources(adapter);
1950         if (unlikely(err))
1951                 return err;
1952
1953         err = atl1e_request_irq(adapter);
1954         if (unlikely(err))
1955                 goto err_req_irq;
1956
1957         err = atl1e_up(adapter);
1958         if (unlikely(err))
1959                 goto err_up;
1960
1961         return 0;
1962
1963 err_up:
1964         atl1e_free_irq(adapter);
1965 err_req_irq:
1966         atl1e_free_ring_resources(adapter);
1967         atl1e_reset_hw(&adapter->hw);
1968
1969         return err;
1970 }
1971
1972 /**
1973  * atl1e_close - Disables a network interface
1974  * @netdev: network interface device structure
1975  *
1976  * Returns 0, this is not allowed to fail
1977  *
1978  * The close entry point is called when an interface is de-activated
1979  * by the OS.  The hardware is still under the drivers control, but
1980  * needs to be disabled.  A global MAC reset is issued to stop the
1981  * hardware, and all transmit and receive resources are freed.
1982  */
1983 static int atl1e_close(struct net_device *netdev)
1984 {
1985         struct atl1e_adapter *adapter = netdev_priv(netdev);
1986
1987         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
1988         atl1e_down(adapter);
1989         atl1e_free_irq(adapter);
1990         atl1e_free_ring_resources(adapter);
1991
1992         return 0;
1993 }
1994
1995 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
1996 {
1997         struct net_device *netdev = pci_get_drvdata(pdev);
1998         struct atl1e_adapter *adapter = netdev_priv(netdev);
1999         struct atl1e_hw *hw = &adapter->hw;
2000         u32 ctrl = 0;
2001         u32 mac_ctrl_data = 0;
2002         u32 wol_ctrl_data = 0;
2003         u16 mii_advertise_data = 0;
2004         u16 mii_bmsr_data = 0;
2005         u16 mii_intr_status_data = 0;
2006         u32 wufc = adapter->wol;
2007         u32 i;
2008 #ifdef CONFIG_PM
2009         int retval = 0;
2010 #endif
2011
2012         if (netif_running(netdev)) {
2013                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2014                 atl1e_down(adapter);
2015         }
2016         netif_device_detach(netdev);
2017
2018 #ifdef CONFIG_PM
2019         retval = pci_save_state(pdev);
2020         if (retval)
2021                 return retval;
2022 #endif
2023
2024         if (wufc) {
2025                 /* get link status */
2026                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2027                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2028
2029                 mii_advertise_data = ADVERTISE_10HALF;
2030
2031                 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2032                     (atl1e_write_phy_reg(hw,
2033                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2034                     (atl1e_phy_commit(hw)) != 0) {
2035                         netdev_dbg(adapter->netdev, "set phy register failed\n");
2036                         goto wol_dis;
2037                 }
2038
2039                 hw->phy_configured = false; /* re-init PHY when resume */
2040
2041                 /* turn on magic packet wol */
2042                 if (wufc & AT_WUFC_MAG)
2043                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2044
2045                 if (wufc & AT_WUFC_LNKC) {
2046                 /* if orignal link status is link, just wait for retrive link */
2047                         if (mii_bmsr_data & BMSR_LSTATUS) {
2048                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2049                                         msleep(100);
2050                                         atl1e_read_phy_reg(hw, MII_BMSR,
2051                                                         &mii_bmsr_data);
2052                                         if (mii_bmsr_data & BMSR_LSTATUS)
2053                                                 break;
2054                                 }
2055
2056                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2057                                         netdev_dbg(adapter->netdev,
2058                                                    "Link may change when suspend\n");
2059                         }
2060                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2061                         /* only link up can wake up */
2062                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2063                                 netdev_dbg(adapter->netdev,
2064                                            "read write phy register failed\n");
2065                                 goto wol_dis;
2066                         }
2067                 }
2068                 /* clear phy interrupt */
2069                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2070                 /* Config MAC Ctrl register */
2071                 mac_ctrl_data = MAC_CTRL_RX_EN;
2072                 /* set to 10/100M halt duplex */
2073                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2074                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2075                                  MAC_CTRL_PRMLEN_MASK) <<
2076                                  MAC_CTRL_PRMLEN_SHIFT);
2077
2078                 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2079
2080                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2081                 if (wufc & AT_WUFC_MAG)
2082                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2083
2084                 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2085                            mac_ctrl_data);
2086
2087                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2088                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2089                 /* pcie patch */
2090                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2091                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2092                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2093                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2094                 goto suspend_exit;
2095         }
2096 wol_dis:
2097
2098         /* WOL disabled */
2099         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2100
2101         /* pcie patch */
2102         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2103         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2104         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2105
2106         atl1e_force_ps(hw);
2107         hw->phy_configured = false; /* re-init PHY when resume */
2108
2109         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2110
2111 suspend_exit:
2112
2113         if (netif_running(netdev))
2114                 atl1e_free_irq(adapter);
2115
2116         pci_disable_device(pdev);
2117
2118         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2119
2120         return 0;
2121 }
2122
2123 #ifdef CONFIG_PM
2124 static int atl1e_resume(struct pci_dev *pdev)
2125 {
2126         struct net_device *netdev = pci_get_drvdata(pdev);
2127         struct atl1e_adapter *adapter = netdev_priv(netdev);
2128         u32 err;
2129
2130         pci_set_power_state(pdev, PCI_D0);
2131         pci_restore_state(pdev);
2132
2133         err = pci_enable_device(pdev);
2134         if (err) {
2135                 netdev_err(adapter->netdev,
2136                            "Cannot enable PCI device from suspend\n");
2137                 return err;
2138         }
2139
2140         pci_set_master(pdev);
2141
2142         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2143
2144         pci_enable_wake(pdev, PCI_D3hot, 0);
2145         pci_enable_wake(pdev, PCI_D3cold, 0);
2146
2147         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2148
2149         if (netif_running(netdev)) {
2150                 err = atl1e_request_irq(adapter);
2151                 if (err)
2152                         return err;
2153         }
2154
2155         atl1e_reset_hw(&adapter->hw);
2156
2157         if (netif_running(netdev))
2158                 atl1e_up(adapter);
2159
2160         netif_device_attach(netdev);
2161
2162         return 0;
2163 }
2164 #endif
2165
2166 static void atl1e_shutdown(struct pci_dev *pdev)
2167 {
2168         atl1e_suspend(pdev, PMSG_SUSPEND);
2169 }
2170
2171 static const struct net_device_ops atl1e_netdev_ops = {
2172         .ndo_open               = atl1e_open,
2173         .ndo_stop               = atl1e_close,
2174         .ndo_start_xmit         = atl1e_xmit_frame,
2175         .ndo_get_stats          = atl1e_get_stats,
2176         .ndo_set_rx_mode        = atl1e_set_multi,
2177         .ndo_validate_addr      = eth_validate_addr,
2178         .ndo_set_mac_address    = atl1e_set_mac_addr,
2179         .ndo_fix_features       = atl1e_fix_features,
2180         .ndo_set_features       = atl1e_set_features,
2181         .ndo_change_mtu         = atl1e_change_mtu,
2182         .ndo_do_ioctl           = atl1e_ioctl,
2183         .ndo_tx_timeout         = atl1e_tx_timeout,
2184 #ifdef CONFIG_NET_POLL_CONTROLLER
2185         .ndo_poll_controller    = atl1e_netpoll,
2186 #endif
2187
2188 };
2189
2190 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2191 {
2192         SET_NETDEV_DEV(netdev, &pdev->dev);
2193         pci_set_drvdata(pdev, netdev);
2194
2195         netdev->netdev_ops = &atl1e_netdev_ops;
2196
2197         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2198         atl1e_set_ethtool_ops(netdev);
2199
2200         netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2201                               NETIF_F_HW_VLAN_CTAG_RX;
2202         netdev->features = netdev->hw_features | NETIF_F_LLTX |
2203                            NETIF_F_HW_VLAN_CTAG_TX;
2204
2205         return 0;
2206 }
2207
2208 /**
2209  * atl1e_probe - Device Initialization Routine
2210  * @pdev: PCI device information struct
2211  * @ent: entry in atl1e_pci_tbl
2212  *
2213  * Returns 0 on success, negative on failure
2214  *
2215  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2216  * The OS initialization, configuring of the adapter private structure,
2217  * and a hardware reset occur.
2218  */
2219 static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2220 {
2221         struct net_device *netdev;
2222         struct atl1e_adapter *adapter = NULL;
2223         static int cards_found;
2224
2225         int err = 0;
2226
2227         err = pci_enable_device(pdev);
2228         if (err) {
2229                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2230                 return err;
2231         }
2232
2233         /*
2234          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2235          * shared register for the high 32 bits, so only a single, aligned,
2236          * 4 GB physical address range can be used at a time.
2237          *
2238          * Supporting 64-bit DMA on this hardware is more trouble than it's
2239          * worth.  It is far easier to limit to 32-bit DMA than update
2240          * various kernel subsystems to support the mechanics required by a
2241          * fixed-high-32-bit system.
2242          */
2243         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2244             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2245                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2246                 goto err_dma;
2247         }
2248
2249         err = pci_request_regions(pdev, atl1e_driver_name);
2250         if (err) {
2251                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2252                 goto err_pci_reg;
2253         }
2254
2255         pci_set_master(pdev);
2256
2257         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2258         if (netdev == NULL) {
2259                 err = -ENOMEM;
2260                 goto err_alloc_etherdev;
2261         }
2262
2263         err = atl1e_init_netdev(netdev, pdev);
2264         if (err) {
2265                 netdev_err(netdev, "init netdevice failed\n");
2266                 goto err_init_netdev;
2267         }
2268         adapter = netdev_priv(netdev);
2269         adapter->bd_number = cards_found;
2270         adapter->netdev = netdev;
2271         adapter->pdev = pdev;
2272         adapter->hw.adapter = adapter;
2273         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2274         if (!adapter->hw.hw_addr) {
2275                 err = -EIO;
2276                 netdev_err(netdev, "cannot map device registers\n");
2277                 goto err_ioremap;
2278         }
2279
2280         /* init mii data */
2281         adapter->mii.dev = netdev;
2282         adapter->mii.mdio_read  = atl1e_mdio_read;
2283         adapter->mii.mdio_write = atl1e_mdio_write;
2284         adapter->mii.phy_id_mask = 0x1f;
2285         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2286
2287         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2288
2289         init_timer(&adapter->phy_config_timer);
2290         adapter->phy_config_timer.function = atl1e_phy_config;
2291         adapter->phy_config_timer.data = (unsigned long) adapter;
2292
2293         /* get user settings */
2294         atl1e_check_options(adapter);
2295         /*
2296          * Mark all PCI regions associated with PCI device
2297          * pdev as being reserved by owner atl1e_driver_name
2298          * Enables bus-mastering on the device and calls
2299          * pcibios_set_master to do the needed arch specific settings
2300          */
2301         atl1e_setup_pcicmd(pdev);
2302         /* setup the private structure */
2303         err = atl1e_sw_init(adapter);
2304         if (err) {
2305                 netdev_err(netdev, "net device private data init failed\n");
2306                 goto err_sw_init;
2307         }
2308
2309         /* Init GPHY as early as possible due to power saving issue  */
2310         atl1e_phy_init(&adapter->hw);
2311         /* reset the controller to
2312          * put the device in a known good starting state */
2313         err = atl1e_reset_hw(&adapter->hw);
2314         if (err) {
2315                 err = -EIO;
2316                 goto err_reset;
2317         }
2318
2319         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2320                 err = -EIO;
2321                 netdev_err(netdev, "get mac address failed\n");
2322                 goto err_eeprom;
2323         }
2324
2325         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2326         netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2327
2328         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2329         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2330         netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2331         err = register_netdev(netdev);
2332         if (err) {
2333                 netdev_err(netdev, "register netdevice failed\n");
2334                 goto err_register;
2335         }
2336
2337         /* assume we have no link for now */
2338         netif_stop_queue(netdev);
2339         netif_carrier_off(netdev);
2340
2341         cards_found++;
2342
2343         return 0;
2344
2345 err_reset:
2346 err_register:
2347 err_sw_init:
2348 err_eeprom:
2349         iounmap(adapter->hw.hw_addr);
2350 err_init_netdev:
2351 err_ioremap:
2352         free_netdev(netdev);
2353 err_alloc_etherdev:
2354         pci_release_regions(pdev);
2355 err_pci_reg:
2356 err_dma:
2357         pci_disable_device(pdev);
2358         return err;
2359 }
2360
2361 /**
2362  * atl1e_remove - Device Removal Routine
2363  * @pdev: PCI device information struct
2364  *
2365  * atl1e_remove is called by the PCI subsystem to alert the driver
2366  * that it should release a PCI device.  The could be caused by a
2367  * Hot-Plug event, or because the driver is going to be removed from
2368  * memory.
2369  */
2370 static void atl1e_remove(struct pci_dev *pdev)
2371 {
2372         struct net_device *netdev = pci_get_drvdata(pdev);
2373         struct atl1e_adapter *adapter = netdev_priv(netdev);
2374
2375         /*
2376          * flush_scheduled work may reschedule our watchdog task, so
2377          * explicitly disable watchdog tasks from being rescheduled
2378          */
2379         set_bit(__AT_DOWN, &adapter->flags);
2380
2381         atl1e_del_timer(adapter);
2382         atl1e_cancel_work(adapter);
2383
2384         unregister_netdev(netdev);
2385         atl1e_free_ring_resources(adapter);
2386         atl1e_force_ps(&adapter->hw);
2387         iounmap(adapter->hw.hw_addr);
2388         pci_release_regions(pdev);
2389         free_netdev(netdev);
2390         pci_disable_device(pdev);
2391 }
2392
2393 /**
2394  * atl1e_io_error_detected - called when PCI error is detected
2395  * @pdev: Pointer to PCI device
2396  * @state: The current pci connection state
2397  *
2398  * This function is called after a PCI bus error affecting
2399  * this device has been detected.
2400  */
2401 static pci_ers_result_t
2402 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2403 {
2404         struct net_device *netdev = pci_get_drvdata(pdev);
2405         struct atl1e_adapter *adapter = netdev_priv(netdev);
2406
2407         netif_device_detach(netdev);
2408
2409         if (state == pci_channel_io_perm_failure)
2410                 return PCI_ERS_RESULT_DISCONNECT;
2411
2412         if (netif_running(netdev))
2413                 atl1e_down(adapter);
2414
2415         pci_disable_device(pdev);
2416
2417         /* Request a slot slot reset. */
2418         return PCI_ERS_RESULT_NEED_RESET;
2419 }
2420
2421 /**
2422  * atl1e_io_slot_reset - called after the pci bus has been reset.
2423  * @pdev: Pointer to PCI device
2424  *
2425  * Restart the card from scratch, as if from a cold-boot. Implementation
2426  * resembles the first-half of the e1000_resume routine.
2427  */
2428 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2429 {
2430         struct net_device *netdev = pci_get_drvdata(pdev);
2431         struct atl1e_adapter *adapter = netdev_priv(netdev);
2432
2433         if (pci_enable_device(pdev)) {
2434                 netdev_err(adapter->netdev,
2435                            "Cannot re-enable PCI device after reset\n");
2436                 return PCI_ERS_RESULT_DISCONNECT;
2437         }
2438         pci_set_master(pdev);
2439
2440         pci_enable_wake(pdev, PCI_D3hot, 0);
2441         pci_enable_wake(pdev, PCI_D3cold, 0);
2442
2443         atl1e_reset_hw(&adapter->hw);
2444
2445         return PCI_ERS_RESULT_RECOVERED;
2446 }
2447
2448 /**
2449  * atl1e_io_resume - called when traffic can start flowing again.
2450  * @pdev: Pointer to PCI device
2451  *
2452  * This callback is called when the error recovery driver tells us that
2453  * its OK to resume normal operation. Implementation resembles the
2454  * second-half of the atl1e_resume routine.
2455  */
2456 static void atl1e_io_resume(struct pci_dev *pdev)
2457 {
2458         struct net_device *netdev = pci_get_drvdata(pdev);
2459         struct atl1e_adapter *adapter = netdev_priv(netdev);
2460
2461         if (netif_running(netdev)) {
2462                 if (atl1e_up(adapter)) {
2463                         netdev_err(adapter->netdev,
2464                                    "can't bring device back up after reset\n");
2465                         return;
2466                 }
2467         }
2468
2469         netif_device_attach(netdev);
2470 }
2471
2472 static const struct pci_error_handlers atl1e_err_handler = {
2473         .error_detected = atl1e_io_error_detected,
2474         .slot_reset = atl1e_io_slot_reset,
2475         .resume = atl1e_io_resume,
2476 };
2477
2478 static struct pci_driver atl1e_driver = {
2479         .name     = atl1e_driver_name,
2480         .id_table = atl1e_pci_tbl,
2481         .probe    = atl1e_probe,
2482         .remove   = atl1e_remove,
2483         /* Power Management Hooks */
2484 #ifdef CONFIG_PM
2485         .suspend  = atl1e_suspend,
2486         .resume   = atl1e_resume,
2487 #endif
2488         .shutdown = atl1e_shutdown,
2489         .err_handler = &atl1e_err_handler
2490 };
2491
2492 /**
2493  * atl1e_init_module - Driver Registration Routine
2494  *
2495  * atl1e_init_module is the first routine called when the driver is
2496  * loaded. All it does is register with the PCI subsystem.
2497  */
2498 static int __init atl1e_init_module(void)
2499 {
2500         return pci_register_driver(&atl1e_driver);
2501 }
2502
2503 /**
2504  * atl1e_exit_module - Driver Exit Cleanup Routine
2505  *
2506  * atl1e_exit_module is called just before the driver is removed
2507  * from memory.
2508  */
2509 static void __exit atl1e_exit_module(void)
2510 {
2511         pci_unregister_driver(&atl1e_driver);
2512 }
2513
2514 module_init(atl1e_init_module);
2515 module_exit(atl1e_exit_module);