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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   4  *
   5  * Derived from Intel e1000 driver
   6  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   7  */
   8
   9 #include "atl1e.h"
  10
  11 char atl1e_driver_name[] = "ATL1E";
  12 #define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
  13 /*
  14  * atl1e_pci_tbl - PCI Device ID Table
  15  *
  16  * Wildcard entries (PCI_ANY_ID) should come last
  17  * Last entry must be all 0s
  18  *
  19  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  20  *   Class, Class Mask, private data (not used) }
  21  */
  22 static const struct pci_device_id atl1e_pci_tbl[] = {
  23         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
  24         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
  25         /* required last entry */
  26         { 0 }
  27 };
  28 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  29
  30 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  31 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  32 MODULE_LICENSE("GPL");
  33
  34 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  35
  36 static const u16
  37 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  38 {
  39         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  40         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  41         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  42         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  43 };
  44
  45 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  46 {
  47         REG_RXF0_BASE_ADDR_HI,
  48         REG_RXF1_BASE_ADDR_HI,
  49         REG_RXF2_BASE_ADDR_HI,
  50         REG_RXF3_BASE_ADDR_HI
  51 };
  52
  53 static const u16
  54 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  55 {
  56         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  57         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  58         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  59         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  60 };
  61
  62 static const u16
  63 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  64 {
  65         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  66         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  67         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  68         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  69 };
  70
  71 static const u16 atl1e_pay_load_size[] = {
  72         128, 256, 512, 1024, 2048, 4096,
  73 };
  74
  75 /**
  76  * atl1e_irq_enable - Enable default interrupt generation settings
  77  * @adapter: board private structure
  78  */
  79 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  80 {
  81         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  82                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
  83                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
  84                 AT_WRITE_FLUSH(&adapter->hw);
  85         }
  86 }
  87
  88 /**
  89  * atl1e_irq_disable - Mask off interrupt generation on the NIC
  90  * @adapter: board private structure
  91  */
  92 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
  93 {
  94         atomic_inc(&adapter->irq_sem);
  95         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
  96         AT_WRITE_FLUSH(&adapter->hw);
  97         synchronize_irq(adapter->pdev->irq);
  98 }
  99
 100 /**
 101  * atl1e_irq_reset - reset interrupt confiure on the NIC
 102  * @adapter: board private structure
 103  */
 104 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 105 {
 106         atomic_set(&adapter->irq_sem, 0);
 107         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 108         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 109         AT_WRITE_FLUSH(&adapter->hw);
 110 }
 111
 112 /**
 113  * atl1e_phy_config - Timer Call-back
 114  * @t: timer list containing pointer to netdev cast into an unsigned long
 115  */
 116 static void atl1e_phy_config(struct timer_list *t)
 117 {
 118         struct atl1e_adapter *adapter = from_timer(adapter, t,
 119                                                    phy_config_timer);
 120         struct atl1e_hw *hw = &adapter->hw;
 121         unsigned long flags;
 122
 123         spin_lock_irqsave(&adapter->mdio_lock, flags);
 124         atl1e_restart_autoneg(hw);
 125         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 126 }
 127
 128 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 129 {
 130         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 131                 msleep(1);
 132         atl1e_down(adapter);
 133         atl1e_up(adapter);
 134         clear_bit(__AT_RESETTING, &adapter->flags);
 135 }
 136
 137 static void atl1e_reset_task(struct work_struct *work)
 138 {
 139         struct atl1e_adapter *adapter;
 140         adapter = container_of(work, struct atl1e_adapter, reset_task);
 141
 142         atl1e_reinit_locked(adapter);
 143 }
 144
 145 static int atl1e_check_link(struct atl1e_adapter *adapter)
 146 {
 147         struct atl1e_hw *hw = &adapter->hw;
 148         struct net_device *netdev = adapter->netdev;
 149         int err = 0;
 150         u16 speed, duplex, phy_data;
 151
 152         /* MII_BMSR must read twice */
 153         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 154         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 155         if ((phy_data & BMSR_LSTATUS) == 0) {
 156                 /* link down */
 157                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 158                         u32 value;
 159                         /* disable rx */
 160                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 161                         value &= ~MAC_CTRL_RX_EN;
 162                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 163                         adapter->link_speed = SPEED_0;
 164                         netif_carrier_off(netdev);
 165                         netif_stop_queue(netdev);
 166                 }
 167         } else {
 168                 /* Link Up */
 169                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 170                 if (unlikely(err))
 171                         return err;
 172
 173                 /* link result is our setting */
 174                 if (adapter->link_speed != speed ||
 175                     adapter->link_duplex != duplex) {
 176                         adapter->link_speed  = speed;
 177                         adapter->link_duplex = duplex;
 178                         atl1e_setup_mac_ctrl(adapter);
 179                         netdev_info(netdev,
 180                                     "NIC Link is Up <%d Mbps %s Duplex>\n",
 181                                     adapter->link_speed,
 182                                     adapter->link_duplex == FULL_DUPLEX ?
 183                                     "Full" : "Half");
 184                 }
 185
 186                 if (!netif_carrier_ok(netdev)) {
 187                         /* Link down -> Up */
 188                         netif_carrier_on(netdev);
 189                         netif_wake_queue(netdev);
 190                 }
 191         }
 192         return 0;
 193 }
 194
 195 /**
 196  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 197  * @work: work struct with driver info
 198  */
 199 static void atl1e_link_chg_task(struct work_struct *work)
 200 {
 201         struct atl1e_adapter *adapter;
 202         unsigned long flags;
 203
 204         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 205         spin_lock_irqsave(&adapter->mdio_lock, flags);
 206         atl1e_check_link(adapter);
 207         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 208 }
 209
 210 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 211 {
 212         struct net_device *netdev = adapter->netdev;
 213         u16 phy_data = 0;
 214         u16 link_up = 0;
 215
 216         spin_lock(&adapter->mdio_lock);
 217         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 218         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 219         spin_unlock(&adapter->mdio_lock);
 220         link_up = phy_data & BMSR_LSTATUS;
 221         /* notify upper layer link down ASAP */
 222         if (!link_up) {
 223                 if (netif_carrier_ok(netdev)) {
 224                         /* old link state: Up */
 225                         netdev_info(netdev, "NIC Link is Down\n");
 226                         adapter->link_speed = SPEED_0;
 227                         netif_stop_queue(netdev);
 228                 }
 229         }
 230         schedule_work(&adapter->link_chg_task);
 231 }
 232
 233 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 234 {
 235         del_timer_sync(&adapter->phy_config_timer);
 236 }
 237
 238 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 239 {
 240         cancel_work_sync(&adapter->reset_task);
 241         cancel_work_sync(&adapter->link_chg_task);
 242 }
 243
 244 /**
 245  * atl1e_tx_timeout - Respond to a Tx Hang
 246  * @netdev: network interface device structure
 247  * @txqueue: the index of the hanging queue
 248  */
 249 static void atl1e_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 250 {
 251         struct atl1e_adapter *adapter = netdev_priv(netdev);
 252
 253         /* Do the reset outside of interrupt context */
 254         schedule_work(&adapter->reset_task);
 255 }
 256
 257 /**
 258  * atl1e_set_multi - Multicast and Promiscuous mode set
 259  * @netdev: network interface device structure
 260  *
 261  * The set_multi entry point is called whenever the multicast address
 262  * list or the network interface flags are updated.  This routine is
 263  * responsible for configuring the hardware for proper multicast,
 264  * promiscuous mode, and all-multi behavior.
 265  */
 266 static void atl1e_set_multi(struct net_device *netdev)
 267 {
 268         struct atl1e_adapter *adapter = netdev_priv(netdev);
 269         struct atl1e_hw *hw = &adapter->hw;
 270         struct netdev_hw_addr *ha;
 271         u32 mac_ctrl_data = 0;
 272         u32 hash_value;
 273
 274         /* Check for Promiscuous and All Multicast modes */
 275         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 276
 277         if (netdev->flags & IFF_PROMISC) {
 278                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 279         } else if (netdev->flags & IFF_ALLMULTI) {
 280                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 281                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 282         } else {
 283                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 284         }
 285
 286         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 287
 288         /* clear the old settings from the multicast hash table */
 289         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 290         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 291
 292         /* comoute mc addresses' hash value ,and put it into hash table */
 293         netdev_for_each_mc_addr(ha, netdev) {
 294                 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 295                 atl1e_hash_set(hw, hash_value);
 296         }
 297 }
 298
 299 static void __atl1e_rx_mode(netdev_features_t features, u32 *mac_ctrl_data)
 300 {
 301
 302         if (features & NETIF_F_RXALL) {
 303                 /* enable RX of ALL frames */
 304                 *mac_ctrl_data |= MAC_CTRL_DBG;
 305         } else {
 306                 /* disable RX of ALL frames */
 307                 *mac_ctrl_data &= ~MAC_CTRL_DBG;
 308         }
 309 }
 310
 311 static void atl1e_rx_mode(struct net_device *netdev,
 312         netdev_features_t features)
 313 {
 314         struct atl1e_adapter *adapter = netdev_priv(netdev);
 315         u32 mac_ctrl_data = 0;
 316
 317         netdev_dbg(adapter->netdev, "%s\n", __func__);
 318
 319         atl1e_irq_disable(adapter);
 320         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 321         __atl1e_rx_mode(features, &mac_ctrl_data);
 322         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 323         atl1e_irq_enable(adapter);
 324 }
 325
 326
 327 static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 328 {
 329         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 330                 /* enable VLAN tag insert/strip */
 331                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 332         } else {
 333                 /* disable VLAN tag insert/strip */
 334                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 335         }
 336 }
 337
 338 static void atl1e_vlan_mode(struct net_device *netdev,
 339         netdev_features_t features)
 340 {
 341         struct atl1e_adapter *adapter = netdev_priv(netdev);
 342         u32 mac_ctrl_data = 0;
 343
 344         netdev_dbg(adapter->netdev, "%s\n", __func__);
 345
 346         atl1e_irq_disable(adapter);
 347         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 348         __atl1e_vlan_mode(features, &mac_ctrl_data);
 349         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 350         atl1e_irq_enable(adapter);
 351 }
 352
 353 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 354 {
 355         netdev_dbg(adapter->netdev, "%s\n", __func__);
 356         atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
 357 }
 358
 359 /**
 360  * atl1e_set_mac_addr - Change the Ethernet Address of the NIC
 361  * @netdev: network interface device structure
 362  * @p: pointer to an address structure
 363  *
 364  * Returns 0 on success, negative on failure
 365  */
 366 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 367 {
 368         struct atl1e_adapter *adapter = netdev_priv(netdev);
 369         struct sockaddr *addr = p;
 370
 371         if (!is_valid_ether_addr(addr->sa_data))
 372                 return -EADDRNOTAVAIL;
 373
 374         if (netif_running(netdev))
 375                 return -EBUSY;
 376
 377         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 378         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 379
 380         atl1e_hw_set_mac_addr(&adapter->hw);
 381
 382         return 0;
 383 }
 384
 385 static netdev_features_t atl1e_fix_features(struct net_device *netdev,
 386         netdev_features_t features)
 387 {
 388         /*
 389          * Since there is no support for separate rx/tx vlan accel
 390          * enable/disable make sure tx flag is always in same state as rx.
 391          */
 392         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 393                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 394         else
 395                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 396
 397         return features;
 398 }
 399
 400 static int atl1e_set_features(struct net_device *netdev,
 401         netdev_features_t features)
 402 {
 403         netdev_features_t changed = netdev->features ^ features;
 404
 405         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 406                 atl1e_vlan_mode(netdev, features);
 407
 408         if (changed & NETIF_F_RXALL)
 409                 atl1e_rx_mode(netdev, features);
 410
 411
 412         return 0;
 413 }
 414
 415 /**
 416  * atl1e_change_mtu - Change the Maximum Transfer Unit
 417  * @netdev: network interface device structure
 418  * @new_mtu: new value for maximum frame size
 419  *
 420  * Returns 0 on success, negative on failure
 421  */
 422 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 423 {
 424         struct atl1e_adapter *adapter = netdev_priv(netdev);
 425         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 426
 427         /* set MTU */
 428         if (netif_running(netdev)) {
 429                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 430                         msleep(1);
 431                 netdev->mtu = new_mtu;
 432                 adapter->hw.max_frame_size = new_mtu;
 433                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 434                 atl1e_down(adapter);
 435                 atl1e_up(adapter);
 436                 clear_bit(__AT_RESETTING, &adapter->flags);
 437         }
 438         return 0;
 439 }
 440
 441 /*
 442  *  caller should hold mdio_lock
 443  */
 444 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 445 {
 446         struct atl1e_adapter *adapter = netdev_priv(netdev);
 447         u16 result;
 448
 449         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 450         return result;
 451 }
 452
 453 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 454                              int reg_num, int val)
 455 {
 456         struct atl1e_adapter *adapter = netdev_priv(netdev);
 457
 458         if (atl1e_write_phy_reg(&adapter->hw,
 459                                 reg_num & MDIO_REG_ADDR_MASK, val))
 460                 netdev_err(netdev, "write phy register failed\n");
 461 }
 462
 463 static int atl1e_mii_ioctl(struct net_device *netdev,
 464                            struct ifreq *ifr, int cmd)
 465 {
 466         struct atl1e_adapter *adapter = netdev_priv(netdev);
 467         struct mii_ioctl_data *data = if_mii(ifr);
 468         unsigned long flags;
 469         int retval = 0;
 470
 471         if (!netif_running(netdev))
 472                 return -EINVAL;
 473
 474         spin_lock_irqsave(&adapter->mdio_lock, flags);
 475         switch (cmd) {
 476         case SIOCGMIIPHY:
 477                 data->phy_id = 0;
 478                 break;
 479
 480         case SIOCGMIIREG:
 481                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 482                                     &data->val_out)) {
 483                         retval = -EIO;
 484                         goto out;
 485                 }
 486                 break;
 487
 488         case SIOCSMIIREG:
 489                 if (data->reg_num & ~(0x1F)) {
 490                         retval = -EFAULT;
 491                         goto out;
 492                 }
 493
 494                 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 495                            data->reg_num, data->val_in);
 496                 if (atl1e_write_phy_reg(&adapter->hw,
 497                                      data->reg_num, data->val_in)) {
 498                         retval = -EIO;
 499                         goto out;
 500                 }
 501                 break;
 502
 503         default:
 504                 retval = -EOPNOTSUPP;
 505                 break;
 506         }
 507 out:
 508         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 509         return retval;
 510
 511 }
 512
 513 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 514 {
 515         switch (cmd) {
 516         case SIOCGMIIPHY:
 517         case SIOCGMIIREG:
 518         case SIOCSMIIREG:
 519                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 520         default:
 521                 return -EOPNOTSUPP;
 522         }
 523 }
 524
 525 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 526 {
 527         u16 cmd;
 528
 529         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 530         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 531         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 532         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 533
 534         /*
 535          * some motherboards BIOS(PXE/EFI) driver may set PME
 536          * while they transfer control to OS (Windows/Linux)
 537          * so we should clear this bit before NIC work normally
 538          */
 539         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 540         msleep(1);
 541 }
 542
 543 /**
 544  * atl1e_alloc_queues - Allocate memory for all rings
 545  * @adapter: board private structure to initialize
 546  *
 547  */
 548 static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
 549 {
 550         return 0;
 551 }
 552
 553 /**
 554  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 555  * @adapter: board private structure to initialize
 556  *
 557  * atl1e_sw_init initializes the Adapter private data structure.
 558  * Fields are initialized based on PCI device information and
 559  * OS network device settings (MTU size).
 560  */
 561 static int atl1e_sw_init(struct atl1e_adapter *adapter)
 562 {
 563         struct atl1e_hw *hw   = &adapter->hw;
 564         struct pci_dev  *pdev = adapter->pdev;
 565         u32 phy_status_data = 0;
 566
 567         adapter->wol = 0;
 568         adapter->link_speed = SPEED_0;   /* hardware init */
 569         adapter->link_duplex = FULL_DUPLEX;
 570         adapter->num_rx_queues = 1;
 571
 572         /* PCI config space info */
 573         hw->vendor_id = pdev->vendor;
 574         hw->device_id = pdev->device;
 575         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 576         hw->subsystem_id = pdev->subsystem_device;
 577         hw->revision_id  = pdev->revision;
 578
 579         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 580
 581         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 582         /* nic type */
 583         if (hw->revision_id >= 0xF0) {
 584                 hw->nic_type = athr_l2e_revB;
 585         } else {
 586                 if (phy_status_data & PHY_STATUS_100M)
 587                         hw->nic_type = athr_l1e;
 588                 else
 589                         hw->nic_type = athr_l2e_revA;
 590         }
 591
 592         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 593
 594         if (phy_status_data & PHY_STATUS_EMI_CA)
 595                 hw->emi_ca = true;
 596         else
 597                 hw->emi_ca = false;
 598
 599         hw->phy_configured = false;
 600         hw->preamble_len = 7;
 601         hw->max_frame_size = adapter->netdev->mtu;
 602         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 603                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 604
 605         hw->rrs_type = atl1e_rrs_disable;
 606         hw->indirect_tab = 0;
 607         hw->base_cpu = 0;
 608
 609         /* need confirm */
 610
 611         hw->ict = 50000;                 /* 100ms */
 612         hw->smb_timer = 200000;          /* 200ms  */
 613         hw->tpd_burst = 5;
 614         hw->rrd_thresh = 1;
 615         hw->tpd_thresh = adapter->tx_ring.count / 2;
 616         hw->rx_count_down = 4;  /* 2us resolution */
 617         hw->tx_count_down = hw->imt * 4 / 3;
 618         hw->dmar_block = atl1e_dma_req_1024;
 619         hw->dmaw_block = atl1e_dma_req_1024;
 620         hw->dmar_dly_cnt = 15;
 621         hw->dmaw_dly_cnt = 4;
 622
 623         if (atl1e_alloc_queues(adapter)) {
 624                 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 625                 return -ENOMEM;
 626         }
 627
 628         atomic_set(&adapter->irq_sem, 1);
 629         spin_lock_init(&adapter->mdio_lock);
 630
 631         set_bit(__AT_DOWN, &adapter->flags);
 632
 633         return 0;
 634 }
 635
 636 /**
 637  * atl1e_clean_tx_ring - Free Tx-skb
 638  * @adapter: board private structure
 639  */
 640 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 641 {
 642         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 643         struct atl1e_tx_buffer *tx_buffer = NULL;
 644         struct pci_dev *pdev = adapter->pdev;
 645         u16 index, ring_count;
 646
 647         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 648                 return;
 649
 650         ring_count = tx_ring->count;
 651         /* first unmmap dma */
 652         for (index = 0; index < ring_count; index++) {
 653                 tx_buffer = &tx_ring->tx_buffer[index];
 654                 if (tx_buffer->dma) {
 655                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 656                                 dma_unmap_single(&pdev->dev, tx_buffer->dma,
 657                                                  tx_buffer->length,
 658                                                  DMA_TO_DEVICE);
 659                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 660                                 dma_unmap_page(&pdev->dev, tx_buffer->dma,
 661                                                tx_buffer->length,
 662                                                DMA_TO_DEVICE);
 663                         tx_buffer->dma = 0;
 664                 }
 665         }
 666         /* second free skb */
 667         for (index = 0; index < ring_count; index++) {
 668                 tx_buffer = &tx_ring->tx_buffer[index];
 669                 if (tx_buffer->skb) {
 670                         dev_kfree_skb_any(tx_buffer->skb);
 671                         tx_buffer->skb = NULL;
 672                 }
 673         }
 674         /* Zero out Tx-buffers */
 675         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 676                                 ring_count);
 677         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 678                                 ring_count);
 679 }
 680
 681 /**
 682  * atl1e_clean_rx_ring - Free rx-reservation skbs
 683  * @adapter: board private structure
 684  */
 685 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 686 {
 687         struct atl1e_rx_ring *rx_ring =
 688                 &adapter->rx_ring;
 689         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 690         u16 i, j;
 691
 692
 693         if (adapter->ring_vir_addr == NULL)
 694                 return;
 695         /* Zero out the descriptor ring */
 696         for (i = 0; i < adapter->num_rx_queues; i++) {
 697                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 698                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 699                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 700                                                 rx_ring->real_page_size);
 701                         }
 702                 }
 703         }
 704 }
 705
 706 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 707 {
 708         *ring_size = ((u32)(adapter->tx_ring.count *
 709                      sizeof(struct atl1e_tpd_desc) + 7
 710                         /* tx ring, qword align */
 711                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 712                         adapter->num_rx_queues + 31
 713                         /* rx ring,  32 bytes align */
 714                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 715                         sizeof(u32) + 3));
 716                         /* tx, rx cmd, dword align   */
 717 }
 718
 719 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 720 {
 721         struct atl1e_rx_ring *rx_ring = NULL;
 722
 723         rx_ring = &adapter->rx_ring;
 724
 725         rx_ring->real_page_size = adapter->rx_ring.page_size
 726                                  + adapter->hw.max_frame_size
 727                                  + ETH_HLEN + VLAN_HLEN
 728                                  + ETH_FCS_LEN;
 729         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 730         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 731
 732         adapter->ring_vir_addr = NULL;
 733         adapter->rx_ring.desc = NULL;
 734         rwlock_init(&adapter->tx_ring.tx_lock);
 735 }
 736
 737 /*
 738  * Read / Write Ptr Initialize:
 739  */
 740 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 741 {
 742         struct atl1e_tx_ring *tx_ring = NULL;
 743         struct atl1e_rx_ring *rx_ring = NULL;
 744         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 745         int i, j;
 746
 747         tx_ring = &adapter->tx_ring;
 748         rx_ring = &adapter->rx_ring;
 749         rx_page_desc = rx_ring->rx_page_desc;
 750
 751         tx_ring->next_to_use = 0;
 752         atomic_set(&tx_ring->next_to_clean, 0);
 753
 754         for (i = 0; i < adapter->num_rx_queues; i++) {
 755                 rx_page_desc[i].rx_using  = 0;
 756                 rx_page_desc[i].rx_nxseq = 0;
 757                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 758                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 759                         rx_page_desc[i].rx_page[j].read_offset = 0;
 760                 }
 761         }
 762 }
 763
 764 /**
 765  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 766  * @adapter: board private structure
 767  *
 768  * Free all transmit software resources
 769  */
 770 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 771 {
 772         struct pci_dev *pdev = adapter->pdev;
 773
 774         atl1e_clean_tx_ring(adapter);
 775         atl1e_clean_rx_ring(adapter);
 776
 777         if (adapter->ring_vir_addr) {
 778                 dma_free_coherent(&pdev->dev, adapter->ring_size,
 779                                   adapter->ring_vir_addr, adapter->ring_dma);
 780                 adapter->ring_vir_addr = NULL;
 781         }
 782
 783         if (adapter->tx_ring.tx_buffer) {
 784                 kfree(adapter->tx_ring.tx_buffer);
 785                 adapter->tx_ring.tx_buffer = NULL;
 786         }
 787 }
 788
 789 /**
 790  * atl1e_setup_ring_resources - allocate Tx / RX descriptor resources
 791  * @adapter: board private structure
 792  *
 793  * Return 0 on success, negative on failure
 794  */
 795 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 796 {
 797         struct pci_dev *pdev = adapter->pdev;
 798         struct atl1e_tx_ring *tx_ring;
 799         struct atl1e_rx_ring *rx_ring;
 800         struct atl1e_rx_page_desc  *rx_page_desc;
 801         int size, i, j;
 802         u32 offset = 0;
 803         int err = 0;
 804
 805         if (adapter->ring_vir_addr != NULL)
 806                 return 0; /* alloced already */
 807
 808         tx_ring = &adapter->tx_ring;
 809         rx_ring = &adapter->rx_ring;
 810
 811         /* real ring DMA buffer */
 812
 813         size = adapter->ring_size;
 814         adapter->ring_vir_addr = dma_alloc_coherent(&pdev->dev,
 815                                                     adapter->ring_size,
 816                                                     &adapter->ring_dma, GFP_KERNEL);
 817         if (adapter->ring_vir_addr == NULL) {
 818                 netdev_err(adapter->netdev,
 819                            "dma_alloc_coherent failed, size = D%d\n", size);
 820                 return -ENOMEM;
 821         }
 822
 823         rx_page_desc = rx_ring->rx_page_desc;
 824
 825         /* Init TPD Ring */
 826         tx_ring->dma = roundup(adapter->ring_dma, 8);
 827         offset = tx_ring->dma - adapter->ring_dma;
 828         tx_ring->desc = adapter->ring_vir_addr + offset;
 829         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 830         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 831         if (tx_ring->tx_buffer == NULL) {
 832                 err = -ENOMEM;
 833                 goto failed;
 834         }
 835
 836         /* Init RXF-Pages */
 837         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 838         offset = roundup(offset, 32);
 839
 840         for (i = 0; i < adapter->num_rx_queues; i++) {
 841                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 842                         rx_page_desc[i].rx_page[j].dma =
 843                                 adapter->ring_dma + offset;
 844                         rx_page_desc[i].rx_page[j].addr =
 845                                 adapter->ring_vir_addr + offset;
 846                         offset += rx_ring->real_page_size;
 847                 }
 848         }
 849
 850         /* Init CMB dma address */
 851         tx_ring->cmb_dma = adapter->ring_dma + offset;
 852         tx_ring->cmb = adapter->ring_vir_addr + offset;
 853         offset += sizeof(u32);
 854
 855         for (i = 0; i < adapter->num_rx_queues; i++) {
 856                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 857                         rx_page_desc[i].rx_page[j].write_offset_dma =
 858                                 adapter->ring_dma + offset;
 859                         rx_page_desc[i].rx_page[j].write_offset_addr =
 860                                 adapter->ring_vir_addr + offset;
 861                         offset += sizeof(u32);
 862                 }
 863         }
 864
 865         if (unlikely(offset > adapter->ring_size)) {
 866                 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 867                            offset, adapter->ring_size);
 868                 err = -1;
 869                 goto failed;
 870         }
 871
 872         return 0;
 873 failed:
 874         if (adapter->ring_vir_addr != NULL) {
 875                 dma_free_coherent(&pdev->dev, adapter->ring_size,
 876                                   adapter->ring_vir_addr, adapter->ring_dma);
 877                 adapter->ring_vir_addr = NULL;
 878         }
 879         return err;
 880 }
 881
 882 static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
 883 {
 884
 885         struct atl1e_hw *hw = &adapter->hw;
 886         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
 887         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 888         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 889         int i, j;
 890
 891         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 892                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 893         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 894                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 895         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 896         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 897                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 898
 899         rx_page_desc = rx_ring->rx_page_desc;
 900         /* RXF Page Physical address / Page Length */
 901         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 902                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 903                                  (u32)((adapter->ring_dma &
 904                                  AT_DMA_HI_ADDR_MASK) >> 32));
 905                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 906                         u32 page_phy_addr;
 907                         u32 offset_phy_addr;
 908
 909                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 910                         offset_phy_addr =
 911                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 912
 913                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 914                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 915                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 916                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 917                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 918                 }
 919         }
 920         /* Page Length */
 921         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 922         /* Load all of base address above */
 923         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 924 }
 925
 926 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 927 {
 928         struct atl1e_hw *hw = &adapter->hw;
 929         u32 dev_ctrl_data = 0;
 930         u32 max_pay_load = 0;
 931         u32 jumbo_thresh = 0;
 932         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 933
 934         /* configure TXQ param */
 935         if (hw->nic_type != athr_l2e_revB) {
 936                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 937                 if (hw->max_frame_size <= 1500) {
 938                         jumbo_thresh = hw->max_frame_size + extra_size;
 939                 } else if (hw->max_frame_size < 6*1024) {
 940                         jumbo_thresh =
 941                                 (hw->max_frame_size + extra_size) * 2 / 3;
 942                 } else {
 943                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 944                 }
 945                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 946         }
 947
 948         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 949
 950         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 951                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 952
 953         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 954
 955         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 956                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 957         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 958
 959         if (hw->nic_type != athr_l2e_revB)
 960                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 961                               atl1e_pay_load_size[hw->dmar_block]);
 962         /* enable TXQ */
 963         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 964                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 965                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 966                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 967 }
 968
 969 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 970 {
 971         struct atl1e_hw *hw = &adapter->hw;
 972         u32 rxf_len  = 0;
 973         u32 rxf_low  = 0;
 974         u32 rxf_high = 0;
 975         u32 rxf_thresh_data = 0;
 976         u32 rxq_ctrl_data = 0;
 977
 978         if (hw->nic_type != athr_l2e_revB) {
 979                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 980                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 981                               RXQ_JMBOSZ_TH_SHIFT |
 982                               (1 & RXQ_JMBO_LKAH_MASK) <<
 983                               RXQ_JMBO_LKAH_SHIFT));
 984
 985                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 986                 rxf_high = rxf_len * 4 / 5;
 987                 rxf_low  = rxf_len / 5;
 988                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 989                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 990                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 991                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 992
 993                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 994         }
 995
 996         /* RRS */
 997         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
 998         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
 999
1000         if (hw->rrs_type & atl1e_rrs_ipv4)
1001                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1002
1003         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1004                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1005
1006         if (hw->rrs_type & atl1e_rrs_ipv6)
1007                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1008
1009         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1010                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1011
1012         if (hw->rrs_type != atl1e_rrs_disable)
1013                 rxq_ctrl_data |=
1014                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1015
1016         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1017                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1018
1019         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1020 }
1021
1022 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1023 {
1024         struct atl1e_hw *hw = &adapter->hw;
1025         u32 dma_ctrl_data = 0;
1026
1027         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1028         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1029                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1030         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1031                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1032         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1033         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1034                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1035         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1036                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1037
1038         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1039 }
1040
1041 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1042 {
1043         u32 value;
1044         struct atl1e_hw *hw = &adapter->hw;
1045         struct net_device *netdev = adapter->netdev;
1046
1047         /* Config MAC CTRL Register */
1048         value = MAC_CTRL_TX_EN |
1049                 MAC_CTRL_RX_EN ;
1050
1051         if (FULL_DUPLEX == adapter->link_duplex)
1052                 value |= MAC_CTRL_DUPLX;
1053
1054         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1055                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1056                           MAC_CTRL_SPEED_SHIFT);
1057         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1058
1059         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1060         value |= (((u32)adapter->hw.preamble_len &
1061                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1062
1063         __atl1e_vlan_mode(netdev->features, &value);
1064
1065         value |= MAC_CTRL_BC_EN;
1066         if (netdev->flags & IFF_PROMISC)
1067                 value |= MAC_CTRL_PROMIS_EN;
1068         if (netdev->flags & IFF_ALLMULTI)
1069                 value |= MAC_CTRL_MC_ALL_EN;
1070         if (netdev->features & NETIF_F_RXALL)
1071                 value |= MAC_CTRL_DBG;
1072         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1073 }
1074
1075 /**
1076  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1077  * @adapter: board private structure
1078  *
1079  * Configure the Tx /Rx unit of the MAC after a reset.
1080  */
1081 static int atl1e_configure(struct atl1e_adapter *adapter)
1082 {
1083         struct atl1e_hw *hw = &adapter->hw;
1084
1085         u32 intr_status_data = 0;
1086
1087         /* clear interrupt status */
1088         AT_WRITE_REG(hw, REG_ISR, ~0);
1089
1090         /* 1. set MAC Address */
1091         atl1e_hw_set_mac_addr(hw);
1092
1093         /* 2. Init the Multicast HASH table done by set_muti */
1094
1095         /* 3. Clear any WOL status */
1096         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1097
1098         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1099          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1100          *    High 32bits memory */
1101         atl1e_configure_des_ring(adapter);
1102
1103         /* 5. set Interrupt Moderator Timer */
1104         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1105         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1106         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1107                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1108
1109         /* 6. rx/tx threshold to trig interrupt */
1110         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1111         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1112         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1113         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1114
1115         /* 7. set Interrupt Clear Timer */
1116         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1117
1118         /* 8. set MTU */
1119         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1120                         VLAN_HLEN + ETH_FCS_LEN);
1121
1122         /* 9. config TXQ early tx threshold */
1123         atl1e_configure_tx(adapter);
1124
1125         /* 10. config RXQ */
1126         atl1e_configure_rx(adapter);
1127
1128         /* 11. config  DMA Engine */
1129         atl1e_configure_dma(adapter);
1130
1131         /* 12. smb timer to trig interrupt */
1132         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1133
1134         intr_status_data = AT_READ_REG(hw, REG_ISR);
1135         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1136                 netdev_err(adapter->netdev,
1137                            "atl1e_configure failed, PCIE phy link down\n");
1138                 return -1;
1139         }
1140
1141         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1142         return 0;
1143 }
1144
1145 /**
1146  * atl1e_get_stats - Get System Network Statistics
1147  * @netdev: network interface device structure
1148  *
1149  * Returns the address of the device statistics structure.
1150  * The statistics are actually updated from the timer callback.
1151  */
1152 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1153 {
1154         struct atl1e_adapter *adapter = netdev_priv(netdev);
1155         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1156         struct net_device_stats *net_stats = &netdev->stats;
1157
1158         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1159         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1160         net_stats->multicast  = hw_stats->rx_mcast;
1161         net_stats->collisions = hw_stats->tx_1_col +
1162                                 hw_stats->tx_2_col +
1163                                 hw_stats->tx_late_col +
1164                                 hw_stats->tx_abort_col;
1165
1166         net_stats->rx_errors  = hw_stats->rx_frag +
1167                                 hw_stats->rx_fcs_err +
1168                                 hw_stats->rx_len_err +
1169                                 hw_stats->rx_sz_ov +
1170                                 hw_stats->rx_rrd_ov +
1171                                 hw_stats->rx_align_err +
1172                                 hw_stats->rx_rxf_ov;
1173
1174         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1175         net_stats->rx_length_errors = hw_stats->rx_len_err;
1176         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1177         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1178         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1179
1180         net_stats->tx_errors = hw_stats->tx_late_col +
1181                                hw_stats->tx_abort_col +
1182                                hw_stats->tx_underrun +
1183                                hw_stats->tx_trunc;
1184
1185         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1186         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1187         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1188
1189         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1190         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1191
1192         return net_stats;
1193 }
1194
1195 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1196 {
1197         u16 hw_reg_addr = 0;
1198         unsigned long *stats_item = NULL;
1199
1200         /* update rx status */
1201         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1202         stats_item  = &adapter->hw_stats.rx_ok;
1203         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1204                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1205                 stats_item++;
1206                 hw_reg_addr += 4;
1207         }
1208         /* update tx status */
1209         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1210         stats_item  = &adapter->hw_stats.tx_ok;
1211         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1212                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1213                 stats_item++;
1214                 hw_reg_addr += 4;
1215         }
1216 }
1217
1218 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1219 {
1220         u16 phy_data;
1221
1222         spin_lock(&adapter->mdio_lock);
1223         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1224         spin_unlock(&adapter->mdio_lock);
1225 }
1226
1227 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1228 {
1229         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1230         struct atl1e_tx_buffer *tx_buffer = NULL;
1231         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1232         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1233
1234         while (next_to_clean != hw_next_to_clean) {
1235                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1236                 if (tx_buffer->dma) {
1237                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1238                                 dma_unmap_single(&adapter->pdev->dev,
1239                                                  tx_buffer->dma,
1240                                                  tx_buffer->length,
1241                                                  DMA_TO_DEVICE);
1242                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1243                                 dma_unmap_page(&adapter->pdev->dev,
1244                                                tx_buffer->dma,
1245                                                tx_buffer->length,
1246                                                DMA_TO_DEVICE);
1247                         tx_buffer->dma = 0;
1248                 }
1249
1250                 if (tx_buffer->skb) {
1251                         dev_consume_skb_irq(tx_buffer->skb);
1252                         tx_buffer->skb = NULL;
1253                 }
1254
1255                 if (++next_to_clean == tx_ring->count)
1256                         next_to_clean = 0;
1257         }
1258
1259         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1260
1261         if (netif_queue_stopped(adapter->netdev) &&
1262                         netif_carrier_ok(adapter->netdev)) {
1263                 netif_wake_queue(adapter->netdev);
1264         }
1265
1266         return true;
1267 }
1268
1269 /**
1270  * atl1e_intr - Interrupt Handler
1271  * @irq: interrupt number
1272  * @data: pointer to a network interface device structure
1273  */
1274 static irqreturn_t atl1e_intr(int irq, void *data)
1275 {
1276         struct net_device *netdev  = data;
1277         struct atl1e_adapter *adapter = netdev_priv(netdev);
1278         struct atl1e_hw *hw = &adapter->hw;
1279         int max_ints = AT_MAX_INT_WORK;
1280         int handled = IRQ_NONE;
1281         u32 status;
1282
1283         do {
1284                 status = AT_READ_REG(hw, REG_ISR);
1285                 if ((status & IMR_NORMAL_MASK) == 0 ||
1286                                 (status & ISR_DIS_INT) != 0) {
1287                         if (max_ints != AT_MAX_INT_WORK)
1288                                 handled = IRQ_HANDLED;
1289                         break;
1290                 }
1291                 /* link event */
1292                 if (status & ISR_GPHY)
1293                         atl1e_clear_phy_int(adapter);
1294                 /* Ack ISR */
1295                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1296
1297                 handled = IRQ_HANDLED;
1298                 /* check if PCIE PHY Link down */
1299                 if (status & ISR_PHY_LINKDOWN) {
1300                         netdev_err(adapter->netdev,
1301                                    "pcie phy linkdown %x\n", status);
1302                         if (netif_running(adapter->netdev)) {
1303                                 /* reset MAC */
1304                                 atl1e_irq_reset(adapter);
1305                                 schedule_work(&adapter->reset_task);
1306                                 break;
1307                         }
1308                 }
1309
1310                 /* check if DMA read/write error */
1311                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1312                         netdev_err(adapter->netdev,
1313                                    "PCIE DMA RW error (status = 0x%x)\n",
1314                                    status);
1315                         atl1e_irq_reset(adapter);
1316                         schedule_work(&adapter->reset_task);
1317                         break;
1318                 }
1319
1320                 if (status & ISR_SMB)
1321                         atl1e_update_hw_stats(adapter);
1322
1323                 /* link event */
1324                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1325                         netdev->stats.tx_carrier_errors++;
1326                         atl1e_link_chg_event(adapter);
1327                         break;
1328                 }
1329
1330                 /* transmit event */
1331                 if (status & ISR_TX_EVENT)
1332                         atl1e_clean_tx_irq(adapter);
1333
1334                 if (status & ISR_RX_EVENT) {
1335                         /*
1336                          * disable rx interrupts, without
1337                          * the synchronize_irq bit
1338                          */
1339                         AT_WRITE_REG(hw, REG_IMR,
1340                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1341                         AT_WRITE_FLUSH(hw);
1342                         if (likely(napi_schedule_prep(
1343                                    &adapter->napi)))
1344                                 __napi_schedule(&adapter->napi);
1345                 }
1346         } while (--max_ints > 0);
1347         /* re-enable Interrupt*/
1348         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1349
1350         return handled;
1351 }
1352
1353 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1354                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1355 {
1356         u8 *packet = (u8 *)(prrs + 1);
1357         struct iphdr *iph;
1358         u16 head_len = ETH_HLEN;
1359         u16 pkt_flags;
1360         u16 err_flags;
1361
1362         skb_checksum_none_assert(skb);
1363         pkt_flags = prrs->pkt_flag;
1364         err_flags = prrs->err_flag;
1365         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1366                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1367                 if (pkt_flags & RRS_IS_IPV4) {
1368                         if (pkt_flags & RRS_IS_802_3)
1369                                 head_len += 8;
1370                         iph = (struct iphdr *) (packet + head_len);
1371                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1372                                 goto hw_xsum;
1373                 }
1374                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1375                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1376                         return;
1377                 }
1378         }
1379
1380 hw_xsum :
1381         return;
1382 }
1383
1384 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1385                                                u8 que)
1386 {
1387         struct atl1e_rx_page_desc *rx_page_desc =
1388                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1389         u8 rx_using = rx_page_desc[que].rx_using;
1390
1391         return &(rx_page_desc[que].rx_page[rx_using]);
1392 }
1393
1394 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1395                    int *work_done, int work_to_do)
1396 {
1397         struct net_device *netdev  = adapter->netdev;
1398         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1399         struct atl1e_rx_page_desc *rx_page_desc =
1400                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1401         struct sk_buff *skb = NULL;
1402         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1403         u32 packet_size, write_offset;
1404         struct atl1e_recv_ret_status *prrs;
1405
1406         write_offset = *(rx_page->write_offset_addr);
1407         if (likely(rx_page->read_offset < write_offset)) {
1408                 do {
1409                         if (*work_done >= work_to_do)
1410                                 break;
1411                         (*work_done)++;
1412                         /* get new packet's  rrs */
1413                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1414                                                  rx_page->read_offset);
1415                         /* check sequence number */
1416                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1417                                 netdev_err(netdev,
1418                                            "rx sequence number error (rx=%d) (expect=%d)\n",
1419                                            prrs->seq_num,
1420                                            rx_page_desc[que].rx_nxseq);
1421                                 rx_page_desc[que].rx_nxseq++;
1422                                 /* just for debug use */
1423                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1424                                              (((u32)prrs->seq_num) << 16) |
1425                                              rx_page_desc[que].rx_nxseq);
1426                                 goto fatal_err;
1427                         }
1428                         rx_page_desc[que].rx_nxseq++;
1429
1430                         /* error packet */
1431                         if ((prrs->pkt_flag & RRS_IS_ERR_FRAME) &&
1432                             !(netdev->features & NETIF_F_RXALL)) {
1433                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1434                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1435                                         RRS_ERR_TRUNC)) {
1436                                 /* hardware error, discard this packet*/
1437                                         netdev_err(netdev,
1438                                                    "rx packet desc error %x\n",
1439                                                    *((u32 *)prrs + 1));
1440                                         goto skip_pkt;
1441                                 }
1442                         }
1443
1444                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1445                                         RRS_PKT_SIZE_MASK);
1446                         if (likely(!(netdev->features & NETIF_F_RXFCS)))
1447                                 packet_size -= 4; /* CRC */
1448
1449                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1450                         if (skb == NULL)
1451                                 goto skip_pkt;
1452
1453                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1454                         skb_put(skb, packet_size);
1455                         skb->protocol = eth_type_trans(skb, netdev);
1456                         atl1e_rx_checksum(adapter, skb, prrs);
1457
1458                         if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1459                                 u16 vlan_tag = (prrs->vtag >> 4) |
1460                                                ((prrs->vtag & 7) << 13) |
1461                                                ((prrs->vtag & 8) << 9);
1462                                 netdev_dbg(netdev,
1463                                            "RXD VLAN TAG<RRD>=0x%04x\n",
1464                                            prrs->vtag);
1465                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1466                         }
1467                         napi_gro_receive(&adapter->napi, skb);
1468
1469 skip_pkt:
1470         /* skip current packet whether it's ok or not. */
1471                         rx_page->read_offset +=
1472                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1473                                 RRS_PKT_SIZE_MASK) +
1474                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1475                                                 0xFFFFFFE0);
1476
1477                         if (rx_page->read_offset >= rx_ring->page_size) {
1478                                 /* mark this page clean */
1479                                 u16 reg_addr;
1480                                 u8  rx_using;
1481
1482                                 rx_page->read_offset =
1483                                         *(rx_page->write_offset_addr) = 0;
1484                                 rx_using = rx_page_desc[que].rx_using;
1485                                 reg_addr =
1486                                         atl1e_rx_page_vld_regs[que][rx_using];
1487                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1488                                 rx_page_desc[que].rx_using ^= 1;
1489                                 rx_page = atl1e_get_rx_page(adapter, que);
1490                         }
1491                         write_offset = *(rx_page->write_offset_addr);
1492                 } while (rx_page->read_offset < write_offset);
1493         }
1494
1495         return;
1496
1497 fatal_err:
1498         if (!test_bit(__AT_DOWN, &adapter->flags))
1499                 schedule_work(&adapter->reset_task);
1500 }
1501
1502 /**
1503  * atl1e_clean - NAPI Rx polling callback
1504  * @napi: napi info
1505  * @budget: number of packets to clean
1506  */
1507 static int atl1e_clean(struct napi_struct *napi, int budget)
1508 {
1509         struct atl1e_adapter *adapter =
1510                         container_of(napi, struct atl1e_adapter, napi);
1511         u32 imr_data;
1512         int work_done = 0;
1513
1514         /* Keep link state information with original netdev */
1515         if (!netif_carrier_ok(adapter->netdev))
1516                 goto quit_polling;
1517
1518         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1519
1520         /* If no Tx and not enough Rx work done, exit the polling mode */
1521         if (work_done < budget) {
1522 quit_polling:
1523                 napi_complete_done(napi, work_done);
1524                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1525                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1526                 /* test debug */
1527                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1528                         atomic_dec(&adapter->irq_sem);
1529                         netdev_err(adapter->netdev,
1530                                    "atl1e_clean is called when AT_DOWN\n");
1531                 }
1532                 /* reenable RX intr */
1533                 /*atl1e_irq_enable(adapter); */
1534
1535         }
1536         return work_done;
1537 }
1538
1539 #ifdef CONFIG_NET_POLL_CONTROLLER
1540
1541 /*
1542  * Polling 'interrupt' - used by things like netconsole to send skbs
1543  * without having to re-enable interrupts. It's not called while
1544  * the interrupt routine is executing.
1545  */
1546 static void atl1e_netpoll(struct net_device *netdev)
1547 {
1548         struct atl1e_adapter *adapter = netdev_priv(netdev);
1549
1550         disable_irq(adapter->pdev->irq);
1551         atl1e_intr(adapter->pdev->irq, netdev);
1552         enable_irq(adapter->pdev->irq);
1553 }
1554 #endif
1555
1556 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1557 {
1558         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1559         u16 next_to_use = 0;
1560         u16 next_to_clean = 0;
1561
1562         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1563         next_to_use   = tx_ring->next_to_use;
1564
1565         return (u16)(next_to_clean > next_to_use) ?
1566                 (next_to_clean - next_to_use - 1) :
1567                 (tx_ring->count + next_to_clean - next_to_use - 1);
1568 }
1569
1570 /*
1571  * get next usable tpd
1572  * Note: should call atl1e_tdp_avail to make sure
1573  * there is enough tpd to use
1574  */
1575 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1576 {
1577         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1578         u16 next_to_use = 0;
1579
1580         next_to_use = tx_ring->next_to_use;
1581         if (++tx_ring->next_to_use == tx_ring->count)
1582                 tx_ring->next_to_use = 0;
1583
1584         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1585         return &tx_ring->desc[next_to_use];
1586 }
1587
1588 static struct atl1e_tx_buffer *
1589 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1590 {
1591         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1592
1593         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1594 }
1595
1596 /* Calculate the transmit packet descript needed*/
1597 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1598 {
1599         int i = 0;
1600         u16 tpd_req = 1;
1601         u16 fg_size = 0;
1602         u16 proto_hdr_len = 0;
1603
1604         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1605                 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1606                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1607         }
1608
1609         if (skb_is_gso(skb)) {
1610                 if (skb->protocol == htons(ETH_P_IP) ||
1611                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1612                         proto_hdr_len = skb_transport_offset(skb) +
1613                                         tcp_hdrlen(skb);
1614                         if (proto_hdr_len < skb_headlen(skb)) {
1615                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1616                                            MAX_TX_BUF_LEN - 1) >>
1617                                            MAX_TX_BUF_SHIFT);
1618                         }
1619                 }
1620
1621         }
1622         return tpd_req;
1623 }
1624
1625 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1626                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1627 {
1628         unsigned short offload_type;
1629         u8 hdr_len;
1630         u32 real_len;
1631
1632         if (skb_is_gso(skb)) {
1633                 int err;
1634
1635                 err = skb_cow_head(skb, 0);
1636                 if (err < 0)
1637                         return err;
1638
1639                 offload_type = skb_shinfo(skb)->gso_type;
1640
1641                 if (offload_type & SKB_GSO_TCPV4) {
1642                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1643                                         + ntohs(ip_hdr(skb)->tot_len));
1644
1645                         if (real_len < skb->len)
1646                                 pskb_trim(skb, real_len);
1647
1648                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1649                         if (unlikely(skb->len == hdr_len)) {
1650                                 /* only xsum need */
1651                                 netdev_warn(adapter->netdev,
1652                                             "IPV4 tso with zero data??\n");
1653                                 goto check_sum;
1654                         } else {
1655                                 ip_hdr(skb)->check = 0;
1656                                 ip_hdr(skb)->tot_len = 0;
1657                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1658                                                         ip_hdr(skb)->saddr,
1659                                                         ip_hdr(skb)->daddr,
1660                                                         0, IPPROTO_TCP, 0);
1661                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1662                                         TDP_V4_IPHL_MASK) <<
1663                                         TPD_V4_IPHL_SHIFT;
1664                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1665                                         TPD_TCPHDRLEN_MASK) <<
1666                                         TPD_TCPHDRLEN_SHIFT;
1667                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1668                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1669                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1670                         }
1671                         return 0;
1672                 }
1673         }
1674
1675 check_sum:
1676         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1677                 u8 css, cso;
1678
1679                 cso = skb_checksum_start_offset(skb);
1680                 if (unlikely(cso & 0x1)) {
1681                         netdev_err(adapter->netdev,
1682                                    "payload offset should not ant event number\n");
1683                         return -1;
1684                 } else {
1685                         css = cso + skb->csum_offset;
1686                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1687                                         TPD_PLOADOFFSET_SHIFT;
1688                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1689                                         TPD_CCSUMOFFSET_SHIFT;
1690                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1691                 }
1692         }
1693
1694         return 0;
1695 }
1696
1697 static int atl1e_tx_map(struct atl1e_adapter *adapter,
1698                         struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1699 {
1700         struct atl1e_tpd_desc *use_tpd = NULL;
1701         struct atl1e_tx_buffer *tx_buffer = NULL;
1702         u16 buf_len = skb_headlen(skb);
1703         u16 map_len = 0;
1704         u16 mapped_len = 0;
1705         u16 hdr_len = 0;
1706         u16 nr_frags;
1707         u16 f;
1708         int segment;
1709         int ring_start = adapter->tx_ring.next_to_use;
1710         int ring_end;
1711
1712         nr_frags = skb_shinfo(skb)->nr_frags;
1713         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1714         if (segment) {
1715                 /* TSO */
1716                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1717                 use_tpd = tpd;
1718
1719                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1720                 tx_buffer->length = map_len;
1721                 tx_buffer->dma = dma_map_single(&adapter->pdev->dev,
1722                                                 skb->data, hdr_len,
1723                                                 DMA_TO_DEVICE);
1724                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1725                         return -ENOSPC;
1726
1727                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1728                 mapped_len += map_len;
1729                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1730                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1731                         ((cpu_to_le32(tx_buffer->length) &
1732                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1733         }
1734
1735         while (mapped_len < buf_len) {
1736                 /* mapped_len == 0, means we should use the first tpd,
1737                    which is given by caller  */
1738                 if (mapped_len == 0) {
1739                         use_tpd = tpd;
1740                 } else {
1741                         use_tpd = atl1e_get_tpd(adapter);
1742                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1743                 }
1744                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1745                 tx_buffer->skb = NULL;
1746
1747                 tx_buffer->length = map_len =
1748                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1749                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1750                 tx_buffer->dma =
1751                         dma_map_single(&adapter->pdev->dev,
1752                                        skb->data + mapped_len, map_len,
1753                                        DMA_TO_DEVICE);
1754
1755                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1756                         /* We need to unwind the mappings we've done */
1757                         ring_end = adapter->tx_ring.next_to_use;
1758                         adapter->tx_ring.next_to_use = ring_start;
1759                         while (adapter->tx_ring.next_to_use != ring_end) {
1760                                 tpd = atl1e_get_tpd(adapter);
1761                                 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1762                                 dma_unmap_single(&adapter->pdev->dev,
1763                                                  tx_buffer->dma,
1764                                                  tx_buffer->length,
1765                                                  DMA_TO_DEVICE);
1766                         }
1767                         /* Reset the tx rings next pointer */
1768                         adapter->tx_ring.next_to_use = ring_start;
1769                         return -ENOSPC;
1770                 }
1771
1772                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1773                 mapped_len  += map_len;
1774                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1775                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1776                         ((cpu_to_le32(tx_buffer->length) &
1777                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1778         }
1779
1780         for (f = 0; f < nr_frags; f++) {
1781                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
1782                 u16 i;
1783                 u16 seg_num;
1784
1785                 buf_len = skb_frag_size(frag);
1786
1787                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1788                 for (i = 0; i < seg_num; i++) {
1789                         use_tpd = atl1e_get_tpd(adapter);
1790                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1791
1792                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1793                         BUG_ON(tx_buffer->skb);
1794
1795                         tx_buffer->skb = NULL;
1796                         tx_buffer->length =
1797                                 (buf_len > MAX_TX_BUF_LEN) ?
1798                                 MAX_TX_BUF_LEN : buf_len;
1799                         buf_len -= tx_buffer->length;
1800
1801                         tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1802                                                           frag,
1803                                                           (i * MAX_TX_BUF_LEN),
1804                                                           tx_buffer->length,
1805                                                           DMA_TO_DEVICE);
1806
1807                         if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1808                                 /* We need to unwind the mappings we've done */
1809                                 ring_end = adapter->tx_ring.next_to_use;
1810                                 adapter->tx_ring.next_to_use = ring_start;
1811                                 while (adapter->tx_ring.next_to_use != ring_end) {
1812                                         tpd = atl1e_get_tpd(adapter);
1813                                         tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1814                                         dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1815                                                        tx_buffer->length, DMA_TO_DEVICE);
1816                                 }
1817
1818                                 /* Reset the ring next to use pointer */
1819                                 adapter->tx_ring.next_to_use = ring_start;
1820                                 return -ENOSPC;
1821                         }
1822
1823                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1824                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1825                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1826                                         ((cpu_to_le32(tx_buffer->length) &
1827                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1828                 }
1829         }
1830
1831         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1832                 /* note this one is a tcp header */
1833                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1834         /* The last tpd */
1835
1836         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1837         /* The last buffer info contain the skb address,
1838            so it will be free after unmap */
1839         tx_buffer->skb = skb;
1840         return 0;
1841 }
1842
1843 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1844                            struct atl1e_tpd_desc *tpd)
1845 {
1846         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1847         /* Force memory writes to complete before letting h/w
1848          * know there are new descriptors to fetch.  (Only
1849          * applicable for weak-ordered memory model archs,
1850          * such as IA-64). */
1851         wmb();
1852         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1853 }
1854
1855 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1856                                           struct net_device *netdev)
1857 {
1858         struct atl1e_adapter *adapter = netdev_priv(netdev);
1859         u16 tpd_req = 1;
1860         struct atl1e_tpd_desc *tpd;
1861
1862         if (test_bit(__AT_DOWN, &adapter->flags)) {
1863                 dev_kfree_skb_any(skb);
1864                 return NETDEV_TX_OK;
1865         }
1866
1867         if (unlikely(skb->len <= 0)) {
1868                 dev_kfree_skb_any(skb);
1869                 return NETDEV_TX_OK;
1870         }
1871         tpd_req = atl1e_cal_tdp_req(skb);
1872
1873         if (atl1e_tpd_avail(adapter) < tpd_req) {
1874                 /* no enough descriptor, just stop queue */
1875                 netif_stop_queue(netdev);
1876                 return NETDEV_TX_BUSY;
1877         }
1878
1879         tpd = atl1e_get_tpd(adapter);
1880
1881         if (skb_vlan_tag_present(skb)) {
1882                 u16 vlan_tag = skb_vlan_tag_get(skb);
1883                 u16 atl1e_vlan_tag;
1884
1885                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1886                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1887                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1888                                 TPD_VLAN_SHIFT;
1889         }
1890
1891         if (skb->protocol == htons(ETH_P_8021Q))
1892                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1893
1894         if (skb_network_offset(skb) != ETH_HLEN)
1895                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1896
1897         /* do TSO and check sum */
1898         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1899                 dev_kfree_skb_any(skb);
1900                 return NETDEV_TX_OK;
1901         }
1902
1903         if (atl1e_tx_map(adapter, skb, tpd)) {
1904                 dev_kfree_skb_any(skb);
1905                 goto out;
1906         }
1907
1908         atl1e_tx_queue(adapter, tpd_req, tpd);
1909 out:
1910         return NETDEV_TX_OK;
1911 }
1912
1913 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1914 {
1915         struct net_device *netdev = adapter->netdev;
1916
1917         free_irq(adapter->pdev->irq, netdev);
1918 }
1919
1920 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1921 {
1922         struct pci_dev    *pdev   = adapter->pdev;
1923         struct net_device *netdev = adapter->netdev;
1924         int err = 0;
1925
1926         err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1927                           netdev);
1928         if (err) {
1929                 netdev_dbg(adapter->netdev,
1930                            "Unable to allocate interrupt Error: %d\n", err);
1931                 return err;
1932         }
1933         netdev_dbg(netdev, "atl1e_request_irq OK\n");
1934         return err;
1935 }
1936
1937 int atl1e_up(struct atl1e_adapter *adapter)
1938 {
1939         struct net_device *netdev = adapter->netdev;
1940         int err = 0;
1941         u32 val;
1942
1943         /* hardware has been reset, we need to reload some things */
1944         err = atl1e_init_hw(&adapter->hw);
1945         if (err) {
1946                 err = -EIO;
1947                 return err;
1948         }
1949         atl1e_init_ring_ptrs(adapter);
1950         atl1e_set_multi(netdev);
1951         atl1e_restore_vlan(adapter);
1952
1953         if (atl1e_configure(adapter)) {
1954                 err = -EIO;
1955                 goto err_up;
1956         }
1957
1958         clear_bit(__AT_DOWN, &adapter->flags);
1959         napi_enable(&adapter->napi);
1960         atl1e_irq_enable(adapter);
1961         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1962         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1963                       val | MASTER_CTRL_MANUAL_INT);
1964
1965 err_up:
1966         return err;
1967 }
1968
1969 void atl1e_down(struct atl1e_adapter *adapter)
1970 {
1971         struct net_device *netdev = adapter->netdev;
1972
1973         /* signal that we're down so the interrupt handler does not
1974          * reschedule our watchdog timer */
1975         set_bit(__AT_DOWN, &adapter->flags);
1976
1977         netif_stop_queue(netdev);
1978
1979         /* reset MAC to disable all RX/TX */
1980         atl1e_reset_hw(&adapter->hw);
1981         msleep(1);
1982
1983         napi_disable(&adapter->napi);
1984         atl1e_del_timer(adapter);
1985         atl1e_irq_disable(adapter);
1986
1987         netif_carrier_off(netdev);
1988         adapter->link_speed = SPEED_0;
1989         adapter->link_duplex = -1;
1990         atl1e_clean_tx_ring(adapter);
1991         atl1e_clean_rx_ring(adapter);
1992 }
1993
1994 /**
1995  * atl1e_open - Called when a network interface is made active
1996  * @netdev: network interface device structure
1997  *
1998  * Returns 0 on success, negative value on failure
1999  *
2000  * The open entry point is called when a network interface is made
2001  * active by the system (IFF_UP).  At this point all resources needed
2002  * for transmit and receive operations are allocated, the interrupt
2003  * handler is registered with the OS, the watchdog timer is started,
2004  * and the stack is notified that the interface is ready.
2005  */
2006 static int atl1e_open(struct net_device *netdev)
2007 {
2008         struct atl1e_adapter *adapter = netdev_priv(netdev);
2009         int err;
2010
2011         /* disallow open during test */
2012         if (test_bit(__AT_TESTING, &adapter->flags))
2013                 return -EBUSY;
2014
2015         /* allocate rx/tx dma buffer & descriptors */
2016         atl1e_init_ring_resources(adapter);
2017         err = atl1e_setup_ring_resources(adapter);
2018         if (unlikely(err))
2019                 return err;
2020
2021         err = atl1e_request_irq(adapter);
2022         if (unlikely(err))
2023                 goto err_req_irq;
2024
2025         err = atl1e_up(adapter);
2026         if (unlikely(err))
2027                 goto err_up;
2028
2029         return 0;
2030
2031 err_up:
2032         atl1e_free_irq(adapter);
2033 err_req_irq:
2034         atl1e_free_ring_resources(adapter);
2035         atl1e_reset_hw(&adapter->hw);
2036
2037         return err;
2038 }
2039
2040 /**
2041  * atl1e_close - Disables a network interface
2042  * @netdev: network interface device structure
2043  *
2044  * Returns 0, this is not allowed to fail
2045  *
2046  * The close entry point is called when an interface is de-activated
2047  * by the OS.  The hardware is still under the drivers control, but
2048  * needs to be disabled.  A global MAC reset is issued to stop the
2049  * hardware, and all transmit and receive resources are freed.
2050  */
2051 static int atl1e_close(struct net_device *netdev)
2052 {
2053         struct atl1e_adapter *adapter = netdev_priv(netdev);
2054
2055         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2056         atl1e_down(adapter);
2057         atl1e_free_irq(adapter);
2058         atl1e_free_ring_resources(adapter);
2059
2060         return 0;
2061 }
2062
2063 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2064 {
2065         struct net_device *netdev = pci_get_drvdata(pdev);
2066         struct atl1e_adapter *adapter = netdev_priv(netdev);
2067         struct atl1e_hw *hw = &adapter->hw;
2068         u32 ctrl = 0;
2069         u32 mac_ctrl_data = 0;
2070         u32 wol_ctrl_data = 0;
2071         u16 mii_advertise_data = 0;
2072         u16 mii_bmsr_data = 0;
2073         u16 mii_intr_status_data = 0;
2074         u32 wufc = adapter->wol;
2075         u32 i;
2076 #ifdef CONFIG_PM
2077         int retval = 0;
2078 #endif
2079
2080         if (netif_running(netdev)) {
2081                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2082                 atl1e_down(adapter);
2083         }
2084         netif_device_detach(netdev);
2085
2086 #ifdef CONFIG_PM
2087         retval = pci_save_state(pdev);
2088         if (retval)
2089                 return retval;
2090 #endif
2091
2092         if (wufc) {
2093                 /* get link status */
2094                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2095                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2096
2097                 mii_advertise_data = ADVERTISE_10HALF;
2098
2099                 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2100                     (atl1e_write_phy_reg(hw,
2101                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2102                     (atl1e_phy_commit(hw)) != 0) {
2103                         netdev_dbg(adapter->netdev, "set phy register failed\n");
2104                         goto wol_dis;
2105                 }
2106
2107                 hw->phy_configured = false; /* re-init PHY when resume */
2108
2109                 /* turn on magic packet wol */
2110                 if (wufc & AT_WUFC_MAG)
2111                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2112
2113                 if (wufc & AT_WUFC_LNKC) {
2114                 /* if orignal link status is link, just wait for retrive link */
2115                         if (mii_bmsr_data & BMSR_LSTATUS) {
2116                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2117                                         msleep(100);
2118                                         atl1e_read_phy_reg(hw, MII_BMSR,
2119                                                         &mii_bmsr_data);
2120                                         if (mii_bmsr_data & BMSR_LSTATUS)
2121                                                 break;
2122                                 }
2123
2124                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2125                                         netdev_dbg(adapter->netdev,
2126                                                    "Link may change when suspend\n");
2127                         }
2128                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2129                         /* only link up can wake up */
2130                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2131                                 netdev_dbg(adapter->netdev,
2132                                            "read write phy register failed\n");
2133                                 goto wol_dis;
2134                         }
2135                 }
2136                 /* clear phy interrupt */
2137                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2138                 /* Config MAC Ctrl register */
2139                 mac_ctrl_data = MAC_CTRL_RX_EN;
2140                 /* set to 10/100M halt duplex */
2141                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2142                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2143                                  MAC_CTRL_PRMLEN_MASK) <<
2144                                  MAC_CTRL_PRMLEN_SHIFT);
2145
2146                 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2147
2148                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2149                 if (wufc & AT_WUFC_MAG)
2150                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2151
2152                 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2153                            mac_ctrl_data);
2154
2155                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2156                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2157                 /* pcie patch */
2158                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2159                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2160                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2161                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2162                 goto suspend_exit;
2163         }
2164 wol_dis:
2165
2166         /* WOL disabled */
2167         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2168
2169         /* pcie patch */
2170         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2171         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2172         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2173
2174         atl1e_force_ps(hw);
2175         hw->phy_configured = false; /* re-init PHY when resume */
2176
2177         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2178
2179 suspend_exit:
2180
2181         if (netif_running(netdev))
2182                 atl1e_free_irq(adapter);
2183
2184         pci_disable_device(pdev);
2185
2186         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2187
2188         return 0;
2189 }
2190
2191 #ifdef CONFIG_PM
2192 static int atl1e_resume(struct pci_dev *pdev)
2193 {
2194         struct net_device *netdev = pci_get_drvdata(pdev);
2195         struct atl1e_adapter *adapter = netdev_priv(netdev);
2196         u32 err;
2197
2198         pci_set_power_state(pdev, PCI_D0);
2199         pci_restore_state(pdev);
2200
2201         err = pci_enable_device(pdev);
2202         if (err) {
2203                 netdev_err(adapter->netdev,
2204                            "Cannot enable PCI device from suspend\n");
2205                 return err;
2206         }
2207
2208         pci_set_master(pdev);
2209
2210         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2211
2212         pci_enable_wake(pdev, PCI_D3hot, 0);
2213         pci_enable_wake(pdev, PCI_D3cold, 0);
2214
2215         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2216
2217         if (netif_running(netdev)) {
2218                 err = atl1e_request_irq(adapter);
2219                 if (err)
2220                         return err;
2221         }
2222
2223         atl1e_reset_hw(&adapter->hw);
2224
2225         if (netif_running(netdev))
2226                 atl1e_up(adapter);
2227
2228         netif_device_attach(netdev);
2229
2230         return 0;
2231 }
2232 #endif
2233
2234 static void atl1e_shutdown(struct pci_dev *pdev)
2235 {
2236         atl1e_suspend(pdev, PMSG_SUSPEND);
2237 }
2238
2239 static const struct net_device_ops atl1e_netdev_ops = {
2240         .ndo_open               = atl1e_open,
2241         .ndo_stop               = atl1e_close,
2242         .ndo_start_xmit         = atl1e_xmit_frame,
2243         .ndo_get_stats          = atl1e_get_stats,
2244         .ndo_set_rx_mode        = atl1e_set_multi,
2245         .ndo_validate_addr      = eth_validate_addr,
2246         .ndo_set_mac_address    = atl1e_set_mac_addr,
2247         .ndo_fix_features       = atl1e_fix_features,
2248         .ndo_set_features       = atl1e_set_features,
2249         .ndo_change_mtu         = atl1e_change_mtu,
2250         .ndo_do_ioctl           = atl1e_ioctl,
2251         .ndo_tx_timeout         = atl1e_tx_timeout,
2252 #ifdef CONFIG_NET_POLL_CONTROLLER
2253         .ndo_poll_controller    = atl1e_netpoll,
2254 #endif
2255
2256 };
2257
2258 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2259 {
2260         SET_NETDEV_DEV(netdev, &pdev->dev);
2261         pci_set_drvdata(pdev, netdev);
2262
2263         netdev->netdev_ops = &atl1e_netdev_ops;
2264
2265         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2266         /* MTU range: 42 - 8170 */
2267         netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2268         netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
2269                           (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2270         atl1e_set_ethtool_ops(netdev);
2271
2272         netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2273                               NETIF_F_HW_VLAN_CTAG_RX;
2274         netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_TX;
2275         /* not enabled by default */
2276         netdev->hw_features |= NETIF_F_RXALL | NETIF_F_RXFCS;
2277         return 0;
2278 }
2279
2280 /**
2281  * atl1e_probe - Device Initialization Routine
2282  * @pdev: PCI device information struct
2283  * @ent: entry in atl1e_pci_tbl
2284  *
2285  * Returns 0 on success, negative on failure
2286  *
2287  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2288  * The OS initialization, configuring of the adapter private structure,
2289  * and a hardware reset occur.
2290  */
2291 static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2292 {
2293         struct net_device *netdev;
2294         struct atl1e_adapter *adapter = NULL;
2295         static int cards_found;
2296
2297         int err = 0;
2298
2299         err = pci_enable_device(pdev);
2300         if (err) {
2301                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2302                 return err;
2303         }
2304
2305         /*
2306          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2307          * shared register for the high 32 bits, so only a single, aligned,
2308          * 4 GB physical address range can be used at a time.
2309          *
2310          * Supporting 64-bit DMA on this hardware is more trouble than it's
2311          * worth.  It is far easier to limit to 32-bit DMA than update
2312          * various kernel subsystems to support the mechanics required by a
2313          * fixed-high-32-bit system.
2314          */
2315         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2316         if (err) {
2317                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2318                 goto err_dma;
2319         }
2320
2321         err = pci_request_regions(pdev, atl1e_driver_name);
2322         if (err) {
2323                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2324                 goto err_pci_reg;
2325         }
2326
2327         pci_set_master(pdev);
2328
2329         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2330         if (netdev == NULL) {
2331                 err = -ENOMEM;
2332                 goto err_alloc_etherdev;
2333         }
2334
2335         err = atl1e_init_netdev(netdev, pdev);
2336         if (err) {
2337                 netdev_err(netdev, "init netdevice failed\n");
2338                 goto err_init_netdev;
2339         }
2340         adapter = netdev_priv(netdev);
2341         adapter->bd_number = cards_found;
2342         adapter->netdev = netdev;
2343         adapter->pdev = pdev;
2344         adapter->hw.adapter = adapter;
2345         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2346         if (!adapter->hw.hw_addr) {
2347                 err = -EIO;
2348                 netdev_err(netdev, "cannot map device registers\n");
2349                 goto err_ioremap;
2350         }
2351
2352         /* init mii data */
2353         adapter->mii.dev = netdev;
2354         adapter->mii.mdio_read  = atl1e_mdio_read;
2355         adapter->mii.mdio_write = atl1e_mdio_write;
2356         adapter->mii.phy_id_mask = 0x1f;
2357         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2358
2359         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2360
2361         timer_setup(&adapter->phy_config_timer, atl1e_phy_config, 0);
2362
2363         /* get user settings */
2364         atl1e_check_options(adapter);
2365         /*
2366          * Mark all PCI regions associated with PCI device
2367          * pdev as being reserved by owner atl1e_driver_name
2368          * Enables bus-mastering on the device and calls
2369          * pcibios_set_master to do the needed arch specific settings
2370          */
2371         atl1e_setup_pcicmd(pdev);
2372         /* setup the private structure */
2373         err = atl1e_sw_init(adapter);
2374         if (err) {
2375                 netdev_err(netdev, "net device private data init failed\n");
2376                 goto err_sw_init;
2377         }
2378
2379         /* Init GPHY as early as possible due to power saving issue  */
2380         atl1e_phy_init(&adapter->hw);
2381         /* reset the controller to
2382          * put the device in a known good starting state */
2383         err = atl1e_reset_hw(&adapter->hw);
2384         if (err) {
2385                 err = -EIO;
2386                 goto err_reset;
2387         }
2388
2389         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2390                 err = -EIO;
2391                 netdev_err(netdev, "get mac address failed\n");
2392                 goto err_eeprom;
2393         }
2394
2395         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2396         netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2397
2398         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2399         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2400         netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2401         err = register_netdev(netdev);
2402         if (err) {
2403                 netdev_err(netdev, "register netdevice failed\n");
2404                 goto err_register;
2405         }
2406
2407         /* assume we have no link for now */
2408         netif_stop_queue(netdev);
2409         netif_carrier_off(netdev);
2410
2411         cards_found++;
2412
2413         return 0;
2414
2415 err_reset:
2416 err_register:
2417 err_sw_init:
2418 err_eeprom:
2419         pci_iounmap(pdev, adapter->hw.hw_addr);
2420 err_init_netdev:
2421 err_ioremap:
2422         free_netdev(netdev);
2423 err_alloc_etherdev:
2424         pci_release_regions(pdev);
2425 err_pci_reg:
2426 err_dma:
2427         pci_disable_device(pdev);
2428         return err;
2429 }
2430
2431 /**
2432  * atl1e_remove - Device Removal Routine
2433  * @pdev: PCI device information struct
2434  *
2435  * atl1e_remove is called by the PCI subsystem to alert the driver
2436  * that it should release a PCI device.  The could be caused by a
2437  * Hot-Plug event, or because the driver is going to be removed from
2438  * memory.
2439  */
2440 static void atl1e_remove(struct pci_dev *pdev)
2441 {
2442         struct net_device *netdev = pci_get_drvdata(pdev);
2443         struct atl1e_adapter *adapter = netdev_priv(netdev);
2444
2445         /*
2446          * flush_scheduled work may reschedule our watchdog task, so
2447          * explicitly disable watchdog tasks from being rescheduled
2448          */
2449         set_bit(__AT_DOWN, &adapter->flags);
2450
2451         atl1e_del_timer(adapter);
2452         atl1e_cancel_work(adapter);
2453
2454         unregister_netdev(netdev);
2455         atl1e_free_ring_resources(adapter);
2456         atl1e_force_ps(&adapter->hw);
2457         pci_iounmap(pdev, adapter->hw.hw_addr);
2458         pci_release_regions(pdev);
2459         free_netdev(netdev);
2460         pci_disable_device(pdev);
2461 }
2462
2463 /**
2464  * atl1e_io_error_detected - called when PCI error is detected
2465  * @pdev: Pointer to PCI device
2466  * @state: The current pci connection state
2467  *
2468  * This function is called after a PCI bus error affecting
2469  * this device has been detected.
2470  */
2471 static pci_ers_result_t
2472 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2473 {
2474         struct net_device *netdev = pci_get_drvdata(pdev);
2475         struct atl1e_adapter *adapter = netdev_priv(netdev);
2476
2477         netif_device_detach(netdev);
2478
2479         if (state == pci_channel_io_perm_failure)
2480                 return PCI_ERS_RESULT_DISCONNECT;
2481
2482         if (netif_running(netdev))
2483                 atl1e_down(adapter);
2484
2485         pci_disable_device(pdev);
2486
2487         /* Request a slot slot reset. */
2488         return PCI_ERS_RESULT_NEED_RESET;
2489 }
2490
2491 /**
2492  * atl1e_io_slot_reset - called after the pci bus has been reset.
2493  * @pdev: Pointer to PCI device
2494  *
2495  * Restart the card from scratch, as if from a cold-boot. Implementation
2496  * resembles the first-half of the e1000_resume routine.
2497  */
2498 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2499 {
2500         struct net_device *netdev = pci_get_drvdata(pdev);
2501         struct atl1e_adapter *adapter = netdev_priv(netdev);
2502
2503         if (pci_enable_device(pdev)) {
2504                 netdev_err(adapter->netdev,
2505                            "Cannot re-enable PCI device after reset\n");
2506                 return PCI_ERS_RESULT_DISCONNECT;
2507         }
2508         pci_set_master(pdev);
2509
2510         pci_enable_wake(pdev, PCI_D3hot, 0);
2511         pci_enable_wake(pdev, PCI_D3cold, 0);
2512
2513         atl1e_reset_hw(&adapter->hw);
2514
2515         return PCI_ERS_RESULT_RECOVERED;
2516 }
2517
2518 /**
2519  * atl1e_io_resume - called when traffic can start flowing again.
2520  * @pdev: Pointer to PCI device
2521  *
2522  * This callback is called when the error recovery driver tells us that
2523  * its OK to resume normal operation. Implementation resembles the
2524  * second-half of the atl1e_resume routine.
2525  */
2526 static void atl1e_io_resume(struct pci_dev *pdev)
2527 {
2528         struct net_device *netdev = pci_get_drvdata(pdev);
2529         struct atl1e_adapter *adapter = netdev_priv(netdev);
2530
2531         if (netif_running(netdev)) {
2532                 if (atl1e_up(adapter)) {
2533                         netdev_err(adapter->netdev,
2534                                    "can't bring device back up after reset\n");
2535                         return;
2536                 }
2537         }
2538
2539         netif_device_attach(netdev);
2540 }
2541
2542 static const struct pci_error_handlers atl1e_err_handler = {
2543         .error_detected = atl1e_io_error_detected,
2544         .slot_reset = atl1e_io_slot_reset,
2545         .resume = atl1e_io_resume,
2546 };
2547
2548 static struct pci_driver atl1e_driver = {
2549         .name     = atl1e_driver_name,
2550         .id_table = atl1e_pci_tbl,
2551         .probe    = atl1e_probe,
2552         .remove   = atl1e_remove,
2553         /* Power Management Hooks */
2554 #ifdef CONFIG_PM
2555         .suspend  = atl1e_suspend,
2556         .resume   = atl1e_resume,
2557 #endif
2558         .shutdown = atl1e_shutdown,
2559         .err_handler = &atl1e_err_handler
2560 };
2561
2562 module_pci_driver(atl1e_driver);