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 #define DRV_VERSION "1.0.0.7-NAPI"
  12
  13 char atl1e_driver_name[] = "ATL1E";
  14 char atl1e_driver_version[] = DRV_VERSION;
  15 #define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
  16 /*
  17  * atl1e_pci_tbl - PCI Device ID Table
  18  *
  19  * Wildcard entries (PCI_ANY_ID) should come last
  20  * Last entry must be all 0s
  21  *
  22  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  23  *   Class, Class Mask, private data (not used) }
  24  */
  25 static const struct pci_device_id atl1e_pci_tbl[] = {
  26         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
  27         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
  28         /* required last entry */
  29         { 0 }
  30 };
  31 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  32
  33 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  34 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  35 MODULE_LICENSE("GPL");
  36 MODULE_VERSION(DRV_VERSION);
  37
  38 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  39
  40 static const u16
  41 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  42 {
  43         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  44         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  45         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  46         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  47 };
  48
  49 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  50 {
  51         REG_RXF0_BASE_ADDR_HI,
  52         REG_RXF1_BASE_ADDR_HI,
  53         REG_RXF2_BASE_ADDR_HI,
  54         REG_RXF3_BASE_ADDR_HI
  55 };
  56
  57 static const u16
  58 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  59 {
  60         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  61         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  62         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  63         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  64 };
  65
  66 static const u16
  67 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  68 {
  69         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  70         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  71         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  72         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  73 };
  74
  75 static const u16 atl1e_pay_load_size[] = {
  76         128, 256, 512, 1024, 2048, 4096,
  77 };
  78
  79 /**
  80  * atl1e_irq_enable - Enable default interrupt generation settings
  81  * @adapter: board private structure
  82  */
  83 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  84 {
  85         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  86                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
  87                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
  88                 AT_WRITE_FLUSH(&adapter->hw);
  89         }
  90 }
  91
  92 /**
  93  * atl1e_irq_disable - Mask off interrupt generation on the NIC
  94  * @adapter: board private structure
  95  */
  96 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
  97 {
  98         atomic_inc(&adapter->irq_sem);
  99         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 100         AT_WRITE_FLUSH(&adapter->hw);
 101         synchronize_irq(adapter->pdev->irq);
 102 }
 103
 104 /**
 105  * atl1e_irq_reset - reset interrupt confiure on the NIC
 106  * @adapter: board private structure
 107  */
 108 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 109 {
 110         atomic_set(&adapter->irq_sem, 0);
 111         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 112         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 113         AT_WRITE_FLUSH(&adapter->hw);
 114 }
 115
 116 /**
 117  * atl1e_phy_config - Timer Call-back
 118  * @data: pointer to netdev cast into an unsigned long
 119  */
 120 static void atl1e_phy_config(struct timer_list *t)
 121 {
 122         struct atl1e_adapter *adapter = from_timer(adapter, t,
 123                                                    phy_config_timer);
 124         struct atl1e_hw *hw = &adapter->hw;
 125         unsigned long flags;
 126
 127         spin_lock_irqsave(&adapter->mdio_lock, flags);
 128         atl1e_restart_autoneg(hw);
 129         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 130 }
 131
 132 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 133 {
 134
 135         WARN_ON(in_interrupt());
 136         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 137                 msleep(1);
 138         atl1e_down(adapter);
 139         atl1e_up(adapter);
 140         clear_bit(__AT_RESETTING, &adapter->flags);
 141 }
 142
 143 static void atl1e_reset_task(struct work_struct *work)
 144 {
 145         struct atl1e_adapter *adapter;
 146         adapter = container_of(work, struct atl1e_adapter, reset_task);
 147
 148         atl1e_reinit_locked(adapter);
 149 }
 150
 151 static int atl1e_check_link(struct atl1e_adapter *adapter)
 152 {
 153         struct atl1e_hw *hw = &adapter->hw;
 154         struct net_device *netdev = adapter->netdev;
 155         int err = 0;
 156         u16 speed, duplex, phy_data;
 157
 158         /* MII_BMSR must read twice */
 159         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 160         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 161         if ((phy_data & BMSR_LSTATUS) == 0) {
 162                 /* link down */
 163                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 164                         u32 value;
 165                         /* disable rx */
 166                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 167                         value &= ~MAC_CTRL_RX_EN;
 168                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 169                         adapter->link_speed = SPEED_0;
 170                         netif_carrier_off(netdev);
 171                         netif_stop_queue(netdev);
 172                 }
 173         } else {
 174                 /* Link Up */
 175                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 176                 if (unlikely(err))
 177                         return err;
 178
 179                 /* link result is our setting */
 180                 if (adapter->link_speed != speed ||
 181                     adapter->link_duplex != duplex) {
 182                         adapter->link_speed  = speed;
 183                         adapter->link_duplex = duplex;
 184                         atl1e_setup_mac_ctrl(adapter);
 185                         netdev_info(netdev,
 186                                     "NIC Link is Up <%d Mbps %s Duplex>\n",
 187                                     adapter->link_speed,
 188                                     adapter->link_duplex == FULL_DUPLEX ?
 189                                     "Full" : "Half");
 190                 }
 191
 192                 if (!netif_carrier_ok(netdev)) {
 193                         /* Link down -> Up */
 194                         netif_carrier_on(netdev);
 195                         netif_wake_queue(netdev);
 196                 }
 197         }
 198         return 0;
 199 }
 200
 201 /**
 202  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 203  * @netdev: network interface device structure
 204  */
 205 static void atl1e_link_chg_task(struct work_struct *work)
 206 {
 207         struct atl1e_adapter *adapter;
 208         unsigned long flags;
 209
 210         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 211         spin_lock_irqsave(&adapter->mdio_lock, flags);
 212         atl1e_check_link(adapter);
 213         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 214 }
 215
 216 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 217 {
 218         struct net_device *netdev = adapter->netdev;
 219         u16 phy_data = 0;
 220         u16 link_up = 0;
 221
 222         spin_lock(&adapter->mdio_lock);
 223         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 224         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 225         spin_unlock(&adapter->mdio_lock);
 226         link_up = phy_data & BMSR_LSTATUS;
 227         /* notify upper layer link down ASAP */
 228         if (!link_up) {
 229                 if (netif_carrier_ok(netdev)) {
 230                         /* old link state: Up */
 231                         netdev_info(netdev, "NIC Link is Down\n");
 232                         adapter->link_speed = SPEED_0;
 233                         netif_stop_queue(netdev);
 234                 }
 235         }
 236         schedule_work(&adapter->link_chg_task);
 237 }
 238
 239 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 240 {
 241         del_timer_sync(&adapter->phy_config_timer);
 242 }
 243
 244 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 245 {
 246         cancel_work_sync(&adapter->reset_task);
 247         cancel_work_sync(&adapter->link_chg_task);
 248 }
 249
 250 /**
 251  * atl1e_tx_timeout - Respond to a Tx Hang
 252  * @netdev: network interface device structure
 253  */
 254 static void atl1e_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 255 {
 256         struct atl1e_adapter *adapter = netdev_priv(netdev);
 257
 258         /* Do the reset outside of interrupt context */
 259         schedule_work(&adapter->reset_task);
 260 }
 261
 262 /**
 263  * atl1e_set_multi - Multicast and Promiscuous mode set
 264  * @netdev: network interface device structure
 265  *
 266  * The set_multi entry point is called whenever the multicast address
 267  * list or the network interface flags are updated.  This routine is
 268  * responsible for configuring the hardware for proper multicast,
 269  * promiscuous mode, and all-multi behavior.
 270  */
 271 static void atl1e_set_multi(struct net_device *netdev)
 272 {
 273         struct atl1e_adapter *adapter = netdev_priv(netdev);
 274         struct atl1e_hw *hw = &adapter->hw;
 275         struct netdev_hw_addr *ha;
 276         u32 mac_ctrl_data = 0;
 277         u32 hash_value;
 278
 279         /* Check for Promiscuous and All Multicast modes */
 280         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 281
 282         if (netdev->flags & IFF_PROMISC) {
 283                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 284         } else if (netdev->flags & IFF_ALLMULTI) {
 285                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 286                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 287         } else {
 288                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 289         }
 290
 291         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 292
 293         /* clear the old settings from the multicast hash table */
 294         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 295         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 296
 297         /* comoute mc addresses' hash value ,and put it into hash table */
 298         netdev_for_each_mc_addr(ha, netdev) {
 299                 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 300                 atl1e_hash_set(hw, hash_value);
 301         }
 302 }
 303
 304 static void __atl1e_rx_mode(netdev_features_t features, u32 *mac_ctrl_data)
 305 {
 306
 307         if (features & NETIF_F_RXALL) {
 308                 /* enable RX of ALL frames */
 309                 *mac_ctrl_data |= MAC_CTRL_DBG;
 310         } else {
 311                 /* disable RX of ALL frames */
 312                 *mac_ctrl_data &= ~MAC_CTRL_DBG;
 313         }
 314 }
 315
 316 static void atl1e_rx_mode(struct net_device *netdev,
 317         netdev_features_t features)
 318 {
 319         struct atl1e_adapter *adapter = netdev_priv(netdev);
 320         u32 mac_ctrl_data = 0;
 321
 322         netdev_dbg(adapter->netdev, "%s\n", __func__);
 323
 324         atl1e_irq_disable(adapter);
 325         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 326         __atl1e_rx_mode(features, &mac_ctrl_data);
 327         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 328         atl1e_irq_enable(adapter);
 329 }
 330
 331
 332 static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 333 {
 334         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 335                 /* enable VLAN tag insert/strip */
 336                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 337         } else {
 338                 /* disable VLAN tag insert/strip */
 339                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 340         }
 341 }
 342
 343 static void atl1e_vlan_mode(struct net_device *netdev,
 344         netdev_features_t features)
 345 {
 346         struct atl1e_adapter *adapter = netdev_priv(netdev);
 347         u32 mac_ctrl_data = 0;
 348
 349         netdev_dbg(adapter->netdev, "%s\n", __func__);
 350
 351         atl1e_irq_disable(adapter);
 352         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 353         __atl1e_vlan_mode(features, &mac_ctrl_data);
 354         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 355         atl1e_irq_enable(adapter);
 356 }
 357
 358 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 359 {
 360         netdev_dbg(adapter->netdev, "%s\n", __func__);
 361         atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
 362 }
 363
 364 /**
 365  * atl1e_set_mac - Change the Ethernet Address of the NIC
 366  * @netdev: network interface device structure
 367  * @p: pointer to an address structure
 368  *
 369  * Returns 0 on success, negative on failure
 370  */
 371 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 372 {
 373         struct atl1e_adapter *adapter = netdev_priv(netdev);
 374         struct sockaddr *addr = p;
 375
 376         if (!is_valid_ether_addr(addr->sa_data))
 377                 return -EADDRNOTAVAIL;
 378
 379         if (netif_running(netdev))
 380                 return -EBUSY;
 381
 382         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 383         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 384
 385         atl1e_hw_set_mac_addr(&adapter->hw);
 386
 387         return 0;
 388 }
 389
 390 static netdev_features_t atl1e_fix_features(struct net_device *netdev,
 391         netdev_features_t features)
 392 {
 393         /*
 394          * Since there is no support for separate rx/tx vlan accel
 395          * enable/disable make sure tx flag is always in same state as rx.
 396          */
 397         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 398                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 399         else
 400                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 401
 402         return features;
 403 }
 404
 405 static int atl1e_set_features(struct net_device *netdev,
 406         netdev_features_t features)
 407 {
 408         netdev_features_t changed = netdev->features ^ features;
 409
 410         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 411                 atl1e_vlan_mode(netdev, features);
 412
 413         if (changed & NETIF_F_RXALL)
 414                 atl1e_rx_mode(netdev, features);
 415
 416
 417         return 0;
 418 }
 419
 420 /**
 421  * atl1e_change_mtu - Change the Maximum Transfer Unit
 422  * @netdev: network interface device structure
 423  * @new_mtu: new value for maximum frame size
 424  *
 425  * Returns 0 on success, negative on failure
 426  */
 427 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 428 {
 429         struct atl1e_adapter *adapter = netdev_priv(netdev);
 430         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 431
 432         /* set MTU */
 433         if (netif_running(netdev)) {
 434                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 435                         msleep(1);
 436                 netdev->mtu = new_mtu;
 437                 adapter->hw.max_frame_size = new_mtu;
 438                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 439                 atl1e_down(adapter);
 440                 atl1e_up(adapter);
 441                 clear_bit(__AT_RESETTING, &adapter->flags);
 442         }
 443         return 0;
 444 }
 445
 446 /*
 447  *  caller should hold mdio_lock
 448  */
 449 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 450 {
 451         struct atl1e_adapter *adapter = netdev_priv(netdev);
 452         u16 result;
 453
 454         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 455         return result;
 456 }
 457
 458 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 459                              int reg_num, int val)
 460 {
 461         struct atl1e_adapter *adapter = netdev_priv(netdev);
 462
 463         if (atl1e_write_phy_reg(&adapter->hw,
 464                                 reg_num & MDIO_REG_ADDR_MASK, val))
 465                 netdev_err(netdev, "write phy register failed\n");
 466 }
 467
 468 static int atl1e_mii_ioctl(struct net_device *netdev,
 469                            struct ifreq *ifr, int cmd)
 470 {
 471         struct atl1e_adapter *adapter = netdev_priv(netdev);
 472         struct mii_ioctl_data *data = if_mii(ifr);
 473         unsigned long flags;
 474         int retval = 0;
 475
 476         if (!netif_running(netdev))
 477                 return -EINVAL;
 478
 479         spin_lock_irqsave(&adapter->mdio_lock, flags);
 480         switch (cmd) {
 481         case SIOCGMIIPHY:
 482                 data->phy_id = 0;
 483                 break;
 484
 485         case SIOCGMIIREG:
 486                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 487                                     &data->val_out)) {
 488                         retval = -EIO;
 489                         goto out;
 490                 }
 491                 break;
 492
 493         case SIOCSMIIREG:
 494                 if (data->reg_num & ~(0x1F)) {
 495                         retval = -EFAULT;
 496                         goto out;
 497                 }
 498
 499                 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 500                            data->reg_num, data->val_in);
 501                 if (atl1e_write_phy_reg(&adapter->hw,
 502                                      data->reg_num, data->val_in)) {
 503                         retval = -EIO;
 504                         goto out;
 505                 }
 506                 break;
 507
 508         default:
 509                 retval = -EOPNOTSUPP;
 510                 break;
 511         }
 512 out:
 513         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 514         return retval;
 515
 516 }
 517
 518 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 519 {
 520         switch (cmd) {
 521         case SIOCGMIIPHY:
 522         case SIOCGMIIREG:
 523         case SIOCSMIIREG:
 524                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 525         default:
 526                 return -EOPNOTSUPP;
 527         }
 528 }
 529
 530 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 531 {
 532         u16 cmd;
 533
 534         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 535         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 536         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 537         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 538
 539         /*
 540          * some motherboards BIOS(PXE/EFI) driver may set PME
 541          * while they transfer control to OS (Windows/Linux)
 542          * so we should clear this bit before NIC work normally
 543          */
 544         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 545         msleep(1);
 546 }
 547
 548 /**
 549  * atl1e_alloc_queues - Allocate memory for all rings
 550  * @adapter: board private structure to initialize
 551  *
 552  */
 553 static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
 554 {
 555         return 0;
 556 }
 557
 558 /**
 559  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 560  * @adapter: board private structure to initialize
 561  *
 562  * atl1e_sw_init initializes the Adapter private data structure.
 563  * Fields are initialized based on PCI device information and
 564  * OS network device settings (MTU size).
 565  */
 566 static int atl1e_sw_init(struct atl1e_adapter *adapter)
 567 {
 568         struct atl1e_hw *hw   = &adapter->hw;
 569         struct pci_dev  *pdev = adapter->pdev;
 570         u32 phy_status_data = 0;
 571
 572         adapter->wol = 0;
 573         adapter->link_speed = SPEED_0;   /* hardware init */
 574         adapter->link_duplex = FULL_DUPLEX;
 575         adapter->num_rx_queues = 1;
 576
 577         /* PCI config space info */
 578         hw->vendor_id = pdev->vendor;
 579         hw->device_id = pdev->device;
 580         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 581         hw->subsystem_id = pdev->subsystem_device;
 582         hw->revision_id  = pdev->revision;
 583
 584         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 585
 586         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 587         /* nic type */
 588         if (hw->revision_id >= 0xF0) {
 589                 hw->nic_type = athr_l2e_revB;
 590         } else {
 591                 if (phy_status_data & PHY_STATUS_100M)
 592                         hw->nic_type = athr_l1e;
 593                 else
 594                         hw->nic_type = athr_l2e_revA;
 595         }
 596
 597         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 598
 599         if (phy_status_data & PHY_STATUS_EMI_CA)
 600                 hw->emi_ca = true;
 601         else
 602                 hw->emi_ca = false;
 603
 604         hw->phy_configured = false;
 605         hw->preamble_len = 7;
 606         hw->max_frame_size = adapter->netdev->mtu;
 607         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 608                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 609
 610         hw->rrs_type = atl1e_rrs_disable;
 611         hw->indirect_tab = 0;
 612         hw->base_cpu = 0;
 613
 614         /* need confirm */
 615
 616         hw->ict = 50000;                 /* 100ms */
 617         hw->smb_timer = 200000;          /* 200ms  */
 618         hw->tpd_burst = 5;
 619         hw->rrd_thresh = 1;
 620         hw->tpd_thresh = adapter->tx_ring.count / 2;
 621         hw->rx_count_down = 4;  /* 2us resolution */
 622         hw->tx_count_down = hw->imt * 4 / 3;
 623         hw->dmar_block = atl1e_dma_req_1024;
 624         hw->dmaw_block = atl1e_dma_req_1024;
 625         hw->dmar_dly_cnt = 15;
 626         hw->dmaw_dly_cnt = 4;
 627
 628         if (atl1e_alloc_queues(adapter)) {
 629                 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 630                 return -ENOMEM;
 631         }
 632
 633         atomic_set(&adapter->irq_sem, 1);
 634         spin_lock_init(&adapter->mdio_lock);
 635
 636         set_bit(__AT_DOWN, &adapter->flags);
 637
 638         return 0;
 639 }
 640
 641 /**
 642  * atl1e_clean_tx_ring - Free Tx-skb
 643  * @adapter: board private structure
 644  */
 645 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 646 {
 647         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 648         struct atl1e_tx_buffer *tx_buffer = NULL;
 649         struct pci_dev *pdev = adapter->pdev;
 650         u16 index, ring_count;
 651
 652         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 653                 return;
 654
 655         ring_count = tx_ring->count;
 656         /* first unmmap dma */
 657         for (index = 0; index < ring_count; index++) {
 658                 tx_buffer = &tx_ring->tx_buffer[index];
 659                 if (tx_buffer->dma) {
 660                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 661                                 pci_unmap_single(pdev, tx_buffer->dma,
 662                                         tx_buffer->length, PCI_DMA_TODEVICE);
 663                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 664                                 pci_unmap_page(pdev, tx_buffer->dma,
 665                                         tx_buffer->length, PCI_DMA_TODEVICE);
 666                         tx_buffer->dma = 0;
 667                 }
 668         }
 669         /* second free skb */
 670         for (index = 0; index < ring_count; index++) {
 671                 tx_buffer = &tx_ring->tx_buffer[index];
 672                 if (tx_buffer->skb) {
 673                         dev_kfree_skb_any(tx_buffer->skb);
 674                         tx_buffer->skb = NULL;
 675                 }
 676         }
 677         /* Zero out Tx-buffers */
 678         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 679                                 ring_count);
 680         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 681                                 ring_count);
 682 }
 683
 684 /**
 685  * atl1e_clean_rx_ring - Free rx-reservation skbs
 686  * @adapter: board private structure
 687  */
 688 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 689 {
 690         struct atl1e_rx_ring *rx_ring =
 691                 &adapter->rx_ring;
 692         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 693         u16 i, j;
 694
 695
 696         if (adapter->ring_vir_addr == NULL)
 697                 return;
 698         /* Zero out the descriptor ring */
 699         for (i = 0; i < adapter->num_rx_queues; i++) {
 700                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 701                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 702                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 703                                                 rx_ring->real_page_size);
 704                         }
 705                 }
 706         }
 707 }
 708
 709 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 710 {
 711         *ring_size = ((u32)(adapter->tx_ring.count *
 712                      sizeof(struct atl1e_tpd_desc) + 7
 713                         /* tx ring, qword align */
 714                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 715                         adapter->num_rx_queues + 31
 716                         /* rx ring,  32 bytes align */
 717                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 718                         sizeof(u32) + 3));
 719                         /* tx, rx cmd, dword align   */
 720 }
 721
 722 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 723 {
 724         struct atl1e_rx_ring *rx_ring = NULL;
 725
 726         rx_ring = &adapter->rx_ring;
 727
 728         rx_ring->real_page_size = adapter->rx_ring.page_size
 729                                  + adapter->hw.max_frame_size
 730                                  + ETH_HLEN + VLAN_HLEN
 731                                  + ETH_FCS_LEN;
 732         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 733         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 734
 735         adapter->ring_vir_addr = NULL;
 736         adapter->rx_ring.desc = NULL;
 737         rwlock_init(&adapter->tx_ring.tx_lock);
 738 }
 739
 740 /*
 741  * Read / Write Ptr Initialize:
 742  */
 743 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 744 {
 745         struct atl1e_tx_ring *tx_ring = NULL;
 746         struct atl1e_rx_ring *rx_ring = NULL;
 747         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 748         int i, j;
 749
 750         tx_ring = &adapter->tx_ring;
 751         rx_ring = &adapter->rx_ring;
 752         rx_page_desc = rx_ring->rx_page_desc;
 753
 754         tx_ring->next_to_use = 0;
 755         atomic_set(&tx_ring->next_to_clean, 0);
 756
 757         for (i = 0; i < adapter->num_rx_queues; i++) {
 758                 rx_page_desc[i].rx_using  = 0;
 759                 rx_page_desc[i].rx_nxseq = 0;
 760                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 761                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 762                         rx_page_desc[i].rx_page[j].read_offset = 0;
 763                 }
 764         }
 765 }
 766
 767 /**
 768  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 769  * @adapter: board private structure
 770  *
 771  * Free all transmit software resources
 772  */
 773 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 774 {
 775         struct pci_dev *pdev = adapter->pdev;
 776
 777         atl1e_clean_tx_ring(adapter);
 778         atl1e_clean_rx_ring(adapter);
 779
 780         if (adapter->ring_vir_addr) {
 781                 pci_free_consistent(pdev, adapter->ring_size,
 782                                 adapter->ring_vir_addr, adapter->ring_dma);
 783                 adapter->ring_vir_addr = NULL;
 784         }
 785
 786         if (adapter->tx_ring.tx_buffer) {
 787                 kfree(adapter->tx_ring.tx_buffer);
 788                 adapter->tx_ring.tx_buffer = NULL;
 789         }
 790 }
 791
 792 /**
 793  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 794  * @adapter: board private structure
 795  *
 796  * Return 0 on success, negative on failure
 797  */
 798 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 799 {
 800         struct pci_dev *pdev = adapter->pdev;
 801         struct atl1e_tx_ring *tx_ring;
 802         struct atl1e_rx_ring *rx_ring;
 803         struct atl1e_rx_page_desc  *rx_page_desc;
 804         int size, i, j;
 805         u32 offset = 0;
 806         int err = 0;
 807
 808         if (adapter->ring_vir_addr != NULL)
 809                 return 0; /* alloced already */
 810
 811         tx_ring = &adapter->tx_ring;
 812         rx_ring = &adapter->rx_ring;
 813
 814         /* real ring DMA buffer */
 815
 816         size = adapter->ring_size;
 817         adapter->ring_vir_addr = pci_zalloc_consistent(pdev, adapter->ring_size,
 818                                                        &adapter->ring_dma);
 819         if (adapter->ring_vir_addr == NULL) {
 820                 netdev_err(adapter->netdev,
 821                            "pci_alloc_consistent failed, size = D%d\n", size);
 822                 return -ENOMEM;
 823         }
 824
 825         rx_page_desc = rx_ring->rx_page_desc;
 826
 827         /* Init TPD Ring */
 828         tx_ring->dma = roundup(adapter->ring_dma, 8);
 829         offset = tx_ring->dma - adapter->ring_dma;
 830         tx_ring->desc = adapter->ring_vir_addr + offset;
 831         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 832         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 833         if (tx_ring->tx_buffer == NULL) {
 834                 err = -ENOMEM;
 835                 goto failed;
 836         }
 837
 838         /* Init RXF-Pages */
 839         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 840         offset = roundup(offset, 32);
 841
 842         for (i = 0; i < adapter->num_rx_queues; i++) {
 843                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 844                         rx_page_desc[i].rx_page[j].dma =
 845                                 adapter->ring_dma + offset;
 846                         rx_page_desc[i].rx_page[j].addr =
 847                                 adapter->ring_vir_addr + offset;
 848                         offset += rx_ring->real_page_size;
 849                 }
 850         }
 851
 852         /* Init CMB dma address */
 853         tx_ring->cmb_dma = adapter->ring_dma + offset;
 854         tx_ring->cmb = adapter->ring_vir_addr + offset;
 855         offset += sizeof(u32);
 856
 857         for (i = 0; i < adapter->num_rx_queues; i++) {
 858                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 859                         rx_page_desc[i].rx_page[j].write_offset_dma =
 860                                 adapter->ring_dma + offset;
 861                         rx_page_desc[i].rx_page[j].write_offset_addr =
 862                                 adapter->ring_vir_addr + offset;
 863                         offset += sizeof(u32);
 864                 }
 865         }
 866
 867         if (unlikely(offset > adapter->ring_size)) {
 868                 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 869                            offset, adapter->ring_size);
 870                 err = -1;
 871                 goto failed;
 872         }
 873
 874         return 0;
 875 failed:
 876         if (adapter->ring_vir_addr != NULL) {
 877                 pci_free_consistent(pdev, adapter->ring_size,
 878                                 adapter->ring_vir_addr, adapter->ring_dma);
 879                 adapter->ring_vir_addr = NULL;
 880         }
 881         return err;
 882 }
 883
 884 static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
 885 {
 886
 887         struct atl1e_hw *hw = &adapter->hw;
 888         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
 889         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 890         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 891         int i, j;
 892
 893         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 894                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 895         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 896                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 897         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 898         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 899                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 900
 901         rx_page_desc = rx_ring->rx_page_desc;
 902         /* RXF Page Physical address / Page Length */
 903         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 904                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 905                                  (u32)((adapter->ring_dma &
 906                                  AT_DMA_HI_ADDR_MASK) >> 32));
 907                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 908                         u32 page_phy_addr;
 909                         u32 offset_phy_addr;
 910
 911                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 912                         offset_phy_addr =
 913                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 914
 915                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 916                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 917                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 918                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 919                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 920                 }
 921         }
 922         /* Page Length */
 923         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 924         /* Load all of base address above */
 925         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 926 }
 927
 928 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 929 {
 930         struct atl1e_hw *hw = &adapter->hw;
 931         u32 dev_ctrl_data = 0;
 932         u32 max_pay_load = 0;
 933         u32 jumbo_thresh = 0;
 934         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 935
 936         /* configure TXQ param */
 937         if (hw->nic_type != athr_l2e_revB) {
 938                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 939                 if (hw->max_frame_size <= 1500) {
 940                         jumbo_thresh = hw->max_frame_size + extra_size;
 941                 } else if (hw->max_frame_size < 6*1024) {
 942                         jumbo_thresh =
 943                                 (hw->max_frame_size + extra_size) * 2 / 3;
 944                 } else {
 945                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 946                 }
 947                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 948         }
 949
 950         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 951
 952         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 953                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 954
 955         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 956
 957         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 958                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 959         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 960
 961         if (hw->nic_type != athr_l2e_revB)
 962                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 963                               atl1e_pay_load_size[hw->dmar_block]);
 964         /* enable TXQ */
 965         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 966                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 967                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 968                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 969 }
 970
 971 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 972 {
 973         struct atl1e_hw *hw = &adapter->hw;
 974         u32 rxf_len  = 0;
 975         u32 rxf_low  = 0;
 976         u32 rxf_high = 0;
 977         u32 rxf_thresh_data = 0;
 978         u32 rxq_ctrl_data = 0;
 979
 980         if (hw->nic_type != athr_l2e_revB) {
 981                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 982                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 983                               RXQ_JMBOSZ_TH_SHIFT |
 984                               (1 & RXQ_JMBO_LKAH_MASK) <<
 985                               RXQ_JMBO_LKAH_SHIFT));
 986
 987                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 988                 rxf_high = rxf_len * 4 / 5;
 989                 rxf_low  = rxf_len / 5;
 990                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 991                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 992                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 993                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 994
 995                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 996         }
 997
 998         /* RRS */
 999         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1000         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1001
1002         if (hw->rrs_type & atl1e_rrs_ipv4)
1003                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1004
1005         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1006                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1007
1008         if (hw->rrs_type & atl1e_rrs_ipv6)
1009                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1010
1011         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1012                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1013
1014         if (hw->rrs_type != atl1e_rrs_disable)
1015                 rxq_ctrl_data |=
1016                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1017
1018         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1019                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1020
1021         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1022 }
1023
1024 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1025 {
1026         struct atl1e_hw *hw = &adapter->hw;
1027         u32 dma_ctrl_data = 0;
1028
1029         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1030         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1031                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1032         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1033                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1034         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1035         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1036                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1037         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1038                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1039
1040         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1041 }
1042
1043 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1044 {
1045         u32 value;
1046         struct atl1e_hw *hw = &adapter->hw;
1047         struct net_device *netdev = adapter->netdev;
1048
1049         /* Config MAC CTRL Register */
1050         value = MAC_CTRL_TX_EN |
1051                 MAC_CTRL_RX_EN ;
1052
1053         if (FULL_DUPLEX == adapter->link_duplex)
1054                 value |= MAC_CTRL_DUPLX;
1055
1056         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1057                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1058                           MAC_CTRL_SPEED_SHIFT);
1059         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1060
1061         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1062         value |= (((u32)adapter->hw.preamble_len &
1063                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1064
1065         __atl1e_vlan_mode(netdev->features, &value);
1066
1067         value |= MAC_CTRL_BC_EN;
1068         if (netdev->flags & IFF_PROMISC)
1069                 value |= MAC_CTRL_PROMIS_EN;
1070         if (netdev->flags & IFF_ALLMULTI)
1071                 value |= MAC_CTRL_MC_ALL_EN;
1072         if (netdev->features & NETIF_F_RXALL)
1073                 value |= MAC_CTRL_DBG;
1074         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1075 }
1076
1077 /**
1078  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1079  * @adapter: board private structure
1080  *
1081  * Configure the Tx /Rx unit of the MAC after a reset.
1082  */
1083 static int atl1e_configure(struct atl1e_adapter *adapter)
1084 {
1085         struct atl1e_hw *hw = &adapter->hw;
1086
1087         u32 intr_status_data = 0;
1088
1089         /* clear interrupt status */
1090         AT_WRITE_REG(hw, REG_ISR, ~0);
1091
1092         /* 1. set MAC Address */
1093         atl1e_hw_set_mac_addr(hw);
1094
1095         /* 2. Init the Multicast HASH table done by set_muti */
1096
1097         /* 3. Clear any WOL status */
1098         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1099
1100         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1101          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1102          *    High 32bits memory */
1103         atl1e_configure_des_ring(adapter);
1104
1105         /* 5. set Interrupt Moderator Timer */
1106         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1107         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1108         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1109                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1110
1111         /* 6. rx/tx threshold to trig interrupt */
1112         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1113         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1114         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1115         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1116
1117         /* 7. set Interrupt Clear Timer */
1118         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1119
1120         /* 8. set MTU */
1121         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1122                         VLAN_HLEN + ETH_FCS_LEN);
1123
1124         /* 9. config TXQ early tx threshold */
1125         atl1e_configure_tx(adapter);
1126
1127         /* 10. config RXQ */
1128         atl1e_configure_rx(adapter);
1129
1130         /* 11. config  DMA Engine */
1131         atl1e_configure_dma(adapter);
1132
1133         /* 12. smb timer to trig interrupt */
1134         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1135
1136         intr_status_data = AT_READ_REG(hw, REG_ISR);
1137         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1138                 netdev_err(adapter->netdev,
1139                            "atl1e_configure failed, PCIE phy link down\n");
1140                 return -1;
1141         }
1142
1143         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1144         return 0;
1145 }
1146
1147 /**
1148  * atl1e_get_stats - Get System Network Statistics
1149  * @netdev: network interface device structure
1150  *
1151  * Returns the address of the device statistics structure.
1152  * The statistics are actually updated from the timer callback.
1153  */
1154 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1155 {
1156         struct atl1e_adapter *adapter = netdev_priv(netdev);
1157         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1158         struct net_device_stats *net_stats = &netdev->stats;
1159
1160         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1161         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1162         net_stats->multicast  = hw_stats->rx_mcast;
1163         net_stats->collisions = hw_stats->tx_1_col +
1164                                 hw_stats->tx_2_col +
1165                                 hw_stats->tx_late_col +
1166                                 hw_stats->tx_abort_col;
1167
1168         net_stats->rx_errors  = hw_stats->rx_frag +
1169                                 hw_stats->rx_fcs_err +
1170                                 hw_stats->rx_len_err +
1171                                 hw_stats->rx_sz_ov +
1172                                 hw_stats->rx_rrd_ov +
1173                                 hw_stats->rx_align_err +
1174                                 hw_stats->rx_rxf_ov;
1175
1176         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1177         net_stats->rx_length_errors = hw_stats->rx_len_err;
1178         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1179         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1180         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1181
1182         net_stats->tx_errors = hw_stats->tx_late_col +
1183                                hw_stats->tx_abort_col +
1184                                hw_stats->tx_underrun +
1185                                hw_stats->tx_trunc;
1186
1187         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1188         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1189         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1190
1191         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1192         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1193
1194         return net_stats;
1195 }
1196
1197 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1198 {
1199         u16 hw_reg_addr = 0;
1200         unsigned long *stats_item = NULL;
1201
1202         /* update rx status */
1203         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1204         stats_item  = &adapter->hw_stats.rx_ok;
1205         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1206                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1207                 stats_item++;
1208                 hw_reg_addr += 4;
1209         }
1210         /* update tx status */
1211         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1212         stats_item  = &adapter->hw_stats.tx_ok;
1213         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1214                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1215                 stats_item++;
1216                 hw_reg_addr += 4;
1217         }
1218 }
1219
1220 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1221 {
1222         u16 phy_data;
1223
1224         spin_lock(&adapter->mdio_lock);
1225         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1226         spin_unlock(&adapter->mdio_lock);
1227 }
1228
1229 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1230 {
1231         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1232         struct atl1e_tx_buffer *tx_buffer = NULL;
1233         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1234         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1235
1236         while (next_to_clean != hw_next_to_clean) {
1237                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1238                 if (tx_buffer->dma) {
1239                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1240                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1241                                         tx_buffer->length, PCI_DMA_TODEVICE);
1242                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1243                                 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1244                                         tx_buffer->length, PCI_DMA_TODEVICE);
1245                         tx_buffer->dma = 0;
1246                 }
1247
1248                 if (tx_buffer->skb) {
1249                         dev_consume_skb_irq(tx_buffer->skb);
1250                         tx_buffer->skb = NULL;
1251                 }
1252
1253                 if (++next_to_clean == tx_ring->count)
1254                         next_to_clean = 0;
1255         }
1256
1257         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1258
1259         if (netif_queue_stopped(adapter->netdev) &&
1260                         netif_carrier_ok(adapter->netdev)) {
1261                 netif_wake_queue(adapter->netdev);
1262         }
1263
1264         return true;
1265 }
1266
1267 /**
1268  * atl1e_intr - Interrupt Handler
1269  * @irq: interrupt number
1270  * @data: pointer to a network interface device structure
1271  */
1272 static irqreturn_t atl1e_intr(int irq, void *data)
1273 {
1274         struct net_device *netdev  = data;
1275         struct atl1e_adapter *adapter = netdev_priv(netdev);
1276         struct atl1e_hw *hw = &adapter->hw;
1277         int max_ints = AT_MAX_INT_WORK;
1278         int handled = IRQ_NONE;
1279         u32 status;
1280
1281         do {
1282                 status = AT_READ_REG(hw, REG_ISR);
1283                 if ((status & IMR_NORMAL_MASK) == 0 ||
1284                                 (status & ISR_DIS_INT) != 0) {
1285                         if (max_ints != AT_MAX_INT_WORK)
1286                                 handled = IRQ_HANDLED;
1287                         break;
1288                 }
1289                 /* link event */
1290                 if (status & ISR_GPHY)
1291                         atl1e_clear_phy_int(adapter);
1292                 /* Ack ISR */
1293                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1294
1295                 handled = IRQ_HANDLED;
1296                 /* check if PCIE PHY Link down */
1297                 if (status & ISR_PHY_LINKDOWN) {
1298                         netdev_err(adapter->netdev,
1299                                    "pcie phy linkdown %x\n", status);
1300                         if (netif_running(adapter->netdev)) {
1301                                 /* reset MAC */
1302                                 atl1e_irq_reset(adapter);
1303                                 schedule_work(&adapter->reset_task);
1304                                 break;
1305                         }
1306                 }
1307
1308                 /* check if DMA read/write error */
1309                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1310                         netdev_err(adapter->netdev,
1311                                    "PCIE DMA RW error (status = 0x%x)\n",
1312                                    status);
1313                         atl1e_irq_reset(adapter);
1314                         schedule_work(&adapter->reset_task);
1315                         break;
1316                 }
1317
1318                 if (status & ISR_SMB)
1319                         atl1e_update_hw_stats(adapter);
1320
1321                 /* link event */
1322                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1323                         netdev->stats.tx_carrier_errors++;
1324                         atl1e_link_chg_event(adapter);
1325                         break;
1326                 }
1327
1328                 /* transmit event */
1329                 if (status & ISR_TX_EVENT)
1330                         atl1e_clean_tx_irq(adapter);
1331
1332                 if (status & ISR_RX_EVENT) {
1333                         /*
1334                          * disable rx interrupts, without
1335                          * the synchronize_irq bit
1336                          */
1337                         AT_WRITE_REG(hw, REG_IMR,
1338                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1339                         AT_WRITE_FLUSH(hw);
1340                         if (likely(napi_schedule_prep(
1341                                    &adapter->napi)))
1342                                 __napi_schedule(&adapter->napi);
1343                 }
1344         } while (--max_ints > 0);
1345         /* re-enable Interrupt*/
1346         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1347
1348         return handled;
1349 }
1350
1351 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1352                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1353 {
1354         u8 *packet = (u8 *)(prrs + 1);
1355         struct iphdr *iph;
1356         u16 head_len = ETH_HLEN;
1357         u16 pkt_flags;
1358         u16 err_flags;
1359
1360         skb_checksum_none_assert(skb);
1361         pkt_flags = prrs->pkt_flag;
1362         err_flags = prrs->err_flag;
1363         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1364                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1365                 if (pkt_flags & RRS_IS_IPV4) {
1366                         if (pkt_flags & RRS_IS_802_3)
1367                                 head_len += 8;
1368                         iph = (struct iphdr *) (packet + head_len);
1369                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1370                                 goto hw_xsum;
1371                 }
1372                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1373                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1374                         return;
1375                 }
1376         }
1377
1378 hw_xsum :
1379         return;
1380 }
1381
1382 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1383                                                u8 que)
1384 {
1385         struct atl1e_rx_page_desc *rx_page_desc =
1386                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1387         u8 rx_using = rx_page_desc[que].rx_using;
1388
1389         return &(rx_page_desc[que].rx_page[rx_using]);
1390 }
1391
1392 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1393                    int *work_done, int work_to_do)
1394 {
1395         struct net_device *netdev  = adapter->netdev;
1396         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1397         struct atl1e_rx_page_desc *rx_page_desc =
1398                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1399         struct sk_buff *skb = NULL;
1400         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1401         u32 packet_size, write_offset;
1402         struct atl1e_recv_ret_status *prrs;
1403
1404         write_offset = *(rx_page->write_offset_addr);
1405         if (likely(rx_page->read_offset < write_offset)) {
1406                 do {
1407                         if (*work_done >= work_to_do)
1408                                 break;
1409                         (*work_done)++;
1410                         /* get new packet's  rrs */
1411                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1412                                                  rx_page->read_offset);
1413                         /* check sequence number */
1414                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1415                                 netdev_err(netdev,
1416                                            "rx sequence number error (rx=%d) (expect=%d)\n",
1417                                            prrs->seq_num,
1418                                            rx_page_desc[que].rx_nxseq);
1419                                 rx_page_desc[que].rx_nxseq++;
1420                                 /* just for debug use */
1421                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1422                                              (((u32)prrs->seq_num) << 16) |
1423                                              rx_page_desc[que].rx_nxseq);
1424                                 goto fatal_err;
1425                         }
1426                         rx_page_desc[que].rx_nxseq++;
1427
1428                         /* error packet */
1429                         if ((prrs->pkt_flag & RRS_IS_ERR_FRAME) &&
1430                             !(netdev->features & NETIF_F_RXALL)) {
1431                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1432                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1433                                         RRS_ERR_TRUNC)) {
1434                                 /* hardware error, discard this packet*/
1435                                         netdev_err(netdev,
1436                                                    "rx packet desc error %x\n",
1437                                                    *((u32 *)prrs + 1));
1438                                         goto skip_pkt;
1439                                 }
1440                         }
1441
1442                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1443                                         RRS_PKT_SIZE_MASK);
1444                         if (likely(!(netdev->features & NETIF_F_RXFCS)))
1445                                 packet_size -= 4; /* CRC */
1446
1447                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1448                         if (skb == NULL)
1449                                 goto skip_pkt;
1450
1451                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1452                         skb_put(skb, packet_size);
1453                         skb->protocol = eth_type_trans(skb, netdev);
1454                         atl1e_rx_checksum(adapter, skb, prrs);
1455
1456                         if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1457                                 u16 vlan_tag = (prrs->vtag >> 4) |
1458                                                ((prrs->vtag & 7) << 13) |
1459                                                ((prrs->vtag & 8) << 9);
1460                                 netdev_dbg(netdev,
1461                                            "RXD VLAN TAG<RRD>=0x%04x\n",
1462                                            prrs->vtag);
1463                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1464                         }
1465                         napi_gro_receive(&adapter->napi, skb);
1466
1467 skip_pkt:
1468         /* skip current packet whether it's ok or not. */
1469                         rx_page->read_offset +=
1470                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1471                                 RRS_PKT_SIZE_MASK) +
1472                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1473                                                 0xFFFFFFE0);
1474
1475                         if (rx_page->read_offset >= rx_ring->page_size) {
1476                                 /* mark this page clean */
1477                                 u16 reg_addr;
1478                                 u8  rx_using;
1479
1480                                 rx_page->read_offset =
1481                                         *(rx_page->write_offset_addr) = 0;
1482                                 rx_using = rx_page_desc[que].rx_using;
1483                                 reg_addr =
1484                                         atl1e_rx_page_vld_regs[que][rx_using];
1485                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1486                                 rx_page_desc[que].rx_using ^= 1;
1487                                 rx_page = atl1e_get_rx_page(adapter, que);
1488                         }
1489                         write_offset = *(rx_page->write_offset_addr);
1490                 } while (rx_page->read_offset < write_offset);
1491         }
1492
1493         return;
1494
1495 fatal_err:
1496         if (!test_bit(__AT_DOWN, &adapter->flags))
1497                 schedule_work(&adapter->reset_task);
1498 }
1499
1500 /**
1501  * atl1e_clean - NAPI Rx polling callback
1502  */
1503 static int atl1e_clean(struct napi_struct *napi, int budget)
1504 {
1505         struct atl1e_adapter *adapter =
1506                         container_of(napi, struct atl1e_adapter, napi);
1507         u32 imr_data;
1508         int work_done = 0;
1509
1510         /* Keep link state information with original netdev */
1511         if (!netif_carrier_ok(adapter->netdev))
1512                 goto quit_polling;
1513
1514         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1515
1516         /* If no Tx and not enough Rx work done, exit the polling mode */
1517         if (work_done < budget) {
1518 quit_polling:
1519                 napi_complete_done(napi, work_done);
1520                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1521                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1522                 /* test debug */
1523                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1524                         atomic_dec(&adapter->irq_sem);
1525                         netdev_err(adapter->netdev,
1526                                    "atl1e_clean is called when AT_DOWN\n");
1527                 }
1528                 /* reenable RX intr */
1529                 /*atl1e_irq_enable(adapter); */
1530
1531         }
1532         return work_done;
1533 }
1534
1535 #ifdef CONFIG_NET_POLL_CONTROLLER
1536
1537 /*
1538  * Polling 'interrupt' - used by things like netconsole to send skbs
1539  * without having to re-enable interrupts. It's not called while
1540  * the interrupt routine is executing.
1541  */
1542 static void atl1e_netpoll(struct net_device *netdev)
1543 {
1544         struct atl1e_adapter *adapter = netdev_priv(netdev);
1545
1546         disable_irq(adapter->pdev->irq);
1547         atl1e_intr(adapter->pdev->irq, netdev);
1548         enable_irq(adapter->pdev->irq);
1549 }
1550 #endif
1551
1552 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1553 {
1554         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1555         u16 next_to_use = 0;
1556         u16 next_to_clean = 0;
1557
1558         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1559         next_to_use   = tx_ring->next_to_use;
1560
1561         return (u16)(next_to_clean > next_to_use) ?
1562                 (next_to_clean - next_to_use - 1) :
1563                 (tx_ring->count + next_to_clean - next_to_use - 1);
1564 }
1565
1566 /*
1567  * get next usable tpd
1568  * Note: should call atl1e_tdp_avail to make sure
1569  * there is enough tpd to use
1570  */
1571 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1572 {
1573         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1574         u16 next_to_use = 0;
1575
1576         next_to_use = tx_ring->next_to_use;
1577         if (++tx_ring->next_to_use == tx_ring->count)
1578                 tx_ring->next_to_use = 0;
1579
1580         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1581         return &tx_ring->desc[next_to_use];
1582 }
1583
1584 static struct atl1e_tx_buffer *
1585 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1586 {
1587         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1588
1589         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1590 }
1591
1592 /* Calculate the transmit packet descript needed*/
1593 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1594 {
1595         int i = 0;
1596         u16 tpd_req = 1;
1597         u16 fg_size = 0;
1598         u16 proto_hdr_len = 0;
1599
1600         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1601                 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1602                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1603         }
1604
1605         if (skb_is_gso(skb)) {
1606                 if (skb->protocol == htons(ETH_P_IP) ||
1607                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1608                         proto_hdr_len = skb_transport_offset(skb) +
1609                                         tcp_hdrlen(skb);
1610                         if (proto_hdr_len < skb_headlen(skb)) {
1611                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1612                                            MAX_TX_BUF_LEN - 1) >>
1613                                            MAX_TX_BUF_SHIFT);
1614                         }
1615                 }
1616
1617         }
1618         return tpd_req;
1619 }
1620
1621 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1622                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1623 {
1624         unsigned short offload_type;
1625         u8 hdr_len;
1626         u32 real_len;
1627
1628         if (skb_is_gso(skb)) {
1629                 int err;
1630
1631                 err = skb_cow_head(skb, 0);
1632                 if (err < 0)
1633                         return err;
1634
1635                 offload_type = skb_shinfo(skb)->gso_type;
1636
1637                 if (offload_type & SKB_GSO_TCPV4) {
1638                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1639                                         + ntohs(ip_hdr(skb)->tot_len));
1640
1641                         if (real_len < skb->len)
1642                                 pskb_trim(skb, real_len);
1643
1644                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1645                         if (unlikely(skb->len == hdr_len)) {
1646                                 /* only xsum need */
1647                                 netdev_warn(adapter->netdev,
1648                                             "IPV4 tso with zero data??\n");
1649                                 goto check_sum;
1650                         } else {
1651                                 ip_hdr(skb)->check = 0;
1652                                 ip_hdr(skb)->tot_len = 0;
1653                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1654                                                         ip_hdr(skb)->saddr,
1655                                                         ip_hdr(skb)->daddr,
1656                                                         0, IPPROTO_TCP, 0);
1657                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1658                                         TDP_V4_IPHL_MASK) <<
1659                                         TPD_V4_IPHL_SHIFT;
1660                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1661                                         TPD_TCPHDRLEN_MASK) <<
1662                                         TPD_TCPHDRLEN_SHIFT;
1663                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1664                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1665                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1666                         }
1667                         return 0;
1668                 }
1669         }
1670
1671 check_sum:
1672         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1673                 u8 css, cso;
1674
1675                 cso = skb_checksum_start_offset(skb);
1676                 if (unlikely(cso & 0x1)) {
1677                         netdev_err(adapter->netdev,
1678                                    "payload offset should not ant event number\n");
1679                         return -1;
1680                 } else {
1681                         css = cso + skb->csum_offset;
1682                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1683                                         TPD_PLOADOFFSET_SHIFT;
1684                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1685                                         TPD_CCSUMOFFSET_SHIFT;
1686                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1687                 }
1688         }
1689
1690         return 0;
1691 }
1692
1693 static int atl1e_tx_map(struct atl1e_adapter *adapter,
1694                         struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1695 {
1696         struct atl1e_tpd_desc *use_tpd = NULL;
1697         struct atl1e_tx_buffer *tx_buffer = NULL;
1698         u16 buf_len = skb_headlen(skb);
1699         u16 map_len = 0;
1700         u16 mapped_len = 0;
1701         u16 hdr_len = 0;
1702         u16 nr_frags;
1703         u16 f;
1704         int segment;
1705         int ring_start = adapter->tx_ring.next_to_use;
1706         int ring_end;
1707
1708         nr_frags = skb_shinfo(skb)->nr_frags;
1709         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1710         if (segment) {
1711                 /* TSO */
1712                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1713                 use_tpd = tpd;
1714
1715                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1716                 tx_buffer->length = map_len;
1717                 tx_buffer->dma = pci_map_single(adapter->pdev,
1718                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1719                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1720                         return -ENOSPC;
1721
1722                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1723                 mapped_len += map_len;
1724                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1725                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1726                         ((cpu_to_le32(tx_buffer->length) &
1727                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1728         }
1729
1730         while (mapped_len < buf_len) {
1731                 /* mapped_len == 0, means we should use the first tpd,
1732                    which is given by caller  */
1733                 if (mapped_len == 0) {
1734                         use_tpd = tpd;
1735                 } else {
1736                         use_tpd = atl1e_get_tpd(adapter);
1737                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1738                 }
1739                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1740                 tx_buffer->skb = NULL;
1741
1742                 tx_buffer->length = map_len =
1743                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1744                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1745                 tx_buffer->dma =
1746                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1747                                         map_len, PCI_DMA_TODEVICE);
1748
1749                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1750                         /* We need to unwind the mappings we've done */
1751                         ring_end = adapter->tx_ring.next_to_use;
1752                         adapter->tx_ring.next_to_use = ring_start;
1753                         while (adapter->tx_ring.next_to_use != ring_end) {
1754                                 tpd = atl1e_get_tpd(adapter);
1755                                 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1756                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1757                                                  tx_buffer->length, PCI_DMA_TODEVICE);
1758                         }
1759                         /* Reset the tx rings next pointer */
1760                         adapter->tx_ring.next_to_use = ring_start;
1761                         return -ENOSPC;
1762                 }
1763
1764                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1765                 mapped_len  += map_len;
1766                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1767                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1768                         ((cpu_to_le32(tx_buffer->length) &
1769                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1770         }
1771
1772         for (f = 0; f < nr_frags; f++) {
1773                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
1774                 u16 i;
1775                 u16 seg_num;
1776
1777                 buf_len = skb_frag_size(frag);
1778
1779                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1780                 for (i = 0; i < seg_num; i++) {
1781                         use_tpd = atl1e_get_tpd(adapter);
1782                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1783
1784                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1785                         BUG_ON(tx_buffer->skb);
1786
1787                         tx_buffer->skb = NULL;
1788                         tx_buffer->length =
1789                                 (buf_len > MAX_TX_BUF_LEN) ?
1790                                 MAX_TX_BUF_LEN : buf_len;
1791                         buf_len -= tx_buffer->length;
1792
1793                         tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1794                                                           frag,
1795                                                           (i * MAX_TX_BUF_LEN),
1796                                                           tx_buffer->length,
1797                                                           DMA_TO_DEVICE);
1798
1799                         if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1800                                 /* We need to unwind the mappings we've done */
1801                                 ring_end = adapter->tx_ring.next_to_use;
1802                                 adapter->tx_ring.next_to_use = ring_start;
1803                                 while (adapter->tx_ring.next_to_use != ring_end) {
1804                                         tpd = atl1e_get_tpd(adapter);
1805                                         tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1806                                         dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1807                                                        tx_buffer->length, DMA_TO_DEVICE);
1808                                 }
1809
1810                                 /* Reset the ring next to use pointer */
1811                                 adapter->tx_ring.next_to_use = ring_start;
1812                                 return -ENOSPC;
1813                         }
1814
1815                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1816                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1817                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1818                                         ((cpu_to_le32(tx_buffer->length) &
1819                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1820                 }
1821         }
1822
1823         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1824                 /* note this one is a tcp header */
1825                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1826         /* The last tpd */
1827
1828         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1829         /* The last buffer info contain the skb address,
1830            so it will be free after unmap */
1831         tx_buffer->skb = skb;
1832         return 0;
1833 }
1834
1835 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1836                            struct atl1e_tpd_desc *tpd)
1837 {
1838         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1839         /* Force memory writes to complete before letting h/w
1840          * know there are new descriptors to fetch.  (Only
1841          * applicable for weak-ordered memory model archs,
1842          * such as IA-64). */
1843         wmb();
1844         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1845 }
1846
1847 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1848                                           struct net_device *netdev)
1849 {
1850         struct atl1e_adapter *adapter = netdev_priv(netdev);
1851         u16 tpd_req = 1;
1852         struct atl1e_tpd_desc *tpd;
1853
1854         if (test_bit(__AT_DOWN, &adapter->flags)) {
1855                 dev_kfree_skb_any(skb);
1856                 return NETDEV_TX_OK;
1857         }
1858
1859         if (unlikely(skb->len <= 0)) {
1860                 dev_kfree_skb_any(skb);
1861                 return NETDEV_TX_OK;
1862         }
1863         tpd_req = atl1e_cal_tdp_req(skb);
1864
1865         if (atl1e_tpd_avail(adapter) < tpd_req) {
1866                 /* no enough descriptor, just stop queue */
1867                 netif_stop_queue(netdev);
1868                 return NETDEV_TX_BUSY;
1869         }
1870
1871         tpd = atl1e_get_tpd(adapter);
1872
1873         if (skb_vlan_tag_present(skb)) {
1874                 u16 vlan_tag = skb_vlan_tag_get(skb);
1875                 u16 atl1e_vlan_tag;
1876
1877                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1878                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1879                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1880                                 TPD_VLAN_SHIFT;
1881         }
1882
1883         if (skb->protocol == htons(ETH_P_8021Q))
1884                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1885
1886         if (skb_network_offset(skb) != ETH_HLEN)
1887                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1888
1889         /* do TSO and check sum */
1890         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1891                 dev_kfree_skb_any(skb);
1892                 return NETDEV_TX_OK;
1893         }
1894
1895         if (atl1e_tx_map(adapter, skb, tpd)) {
1896                 dev_kfree_skb_any(skb);
1897                 goto out;
1898         }
1899
1900         atl1e_tx_queue(adapter, tpd_req, tpd);
1901 out:
1902         return NETDEV_TX_OK;
1903 }
1904
1905 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1906 {
1907         struct net_device *netdev = adapter->netdev;
1908
1909         free_irq(adapter->pdev->irq, netdev);
1910 }
1911
1912 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1913 {
1914         struct pci_dev    *pdev   = adapter->pdev;
1915         struct net_device *netdev = adapter->netdev;
1916         int err = 0;
1917
1918         err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1919                           netdev);
1920         if (err) {
1921                 netdev_dbg(adapter->netdev,
1922                            "Unable to allocate interrupt Error: %d\n", err);
1923                 return err;
1924         }
1925         netdev_dbg(netdev, "atl1e_request_irq OK\n");
1926         return err;
1927 }
1928
1929 int atl1e_up(struct atl1e_adapter *adapter)
1930 {
1931         struct net_device *netdev = adapter->netdev;
1932         int err = 0;
1933         u32 val;
1934
1935         /* hardware has been reset, we need to reload some things */
1936         err = atl1e_init_hw(&adapter->hw);
1937         if (err) {
1938                 err = -EIO;
1939                 return err;
1940         }
1941         atl1e_init_ring_ptrs(adapter);
1942         atl1e_set_multi(netdev);
1943         atl1e_restore_vlan(adapter);
1944
1945         if (atl1e_configure(adapter)) {
1946                 err = -EIO;
1947                 goto err_up;
1948         }
1949
1950         clear_bit(__AT_DOWN, &adapter->flags);
1951         napi_enable(&adapter->napi);
1952         atl1e_irq_enable(adapter);
1953         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1954         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1955                       val | MASTER_CTRL_MANUAL_INT);
1956
1957 err_up:
1958         return err;
1959 }
1960
1961 void atl1e_down(struct atl1e_adapter *adapter)
1962 {
1963         struct net_device *netdev = adapter->netdev;
1964
1965         /* signal that we're down so the interrupt handler does not
1966          * reschedule our watchdog timer */
1967         set_bit(__AT_DOWN, &adapter->flags);
1968
1969         netif_stop_queue(netdev);
1970
1971         /* reset MAC to disable all RX/TX */
1972         atl1e_reset_hw(&adapter->hw);
1973         msleep(1);
1974
1975         napi_disable(&adapter->napi);
1976         atl1e_del_timer(adapter);
1977         atl1e_irq_disable(adapter);
1978
1979         netif_carrier_off(netdev);
1980         adapter->link_speed = SPEED_0;
1981         adapter->link_duplex = -1;
1982         atl1e_clean_tx_ring(adapter);
1983         atl1e_clean_rx_ring(adapter);
1984 }
1985
1986 /**
1987  * atl1e_open - Called when a network interface is made active
1988  * @netdev: network interface device structure
1989  *
1990  * Returns 0 on success, negative value on failure
1991  *
1992  * The open entry point is called when a network interface is made
1993  * active by the system (IFF_UP).  At this point all resources needed
1994  * for transmit and receive operations are allocated, the interrupt
1995  * handler is registered with the OS, the watchdog timer is started,
1996  * and the stack is notified that the interface is ready.
1997  */
1998 static int atl1e_open(struct net_device *netdev)
1999 {
2000         struct atl1e_adapter *adapter = netdev_priv(netdev);
2001         int err;
2002
2003         /* disallow open during test */
2004         if (test_bit(__AT_TESTING, &adapter->flags))
2005                 return -EBUSY;
2006
2007         /* allocate rx/tx dma buffer & descriptors */
2008         atl1e_init_ring_resources(adapter);
2009         err = atl1e_setup_ring_resources(adapter);
2010         if (unlikely(err))
2011                 return err;
2012
2013         err = atl1e_request_irq(adapter);
2014         if (unlikely(err))
2015                 goto err_req_irq;
2016
2017         err = atl1e_up(adapter);
2018         if (unlikely(err))
2019                 goto err_up;
2020
2021         return 0;
2022
2023 err_up:
2024         atl1e_free_irq(adapter);
2025 err_req_irq:
2026         atl1e_free_ring_resources(adapter);
2027         atl1e_reset_hw(&adapter->hw);
2028
2029         return err;
2030 }
2031
2032 /**
2033  * atl1e_close - Disables a network interface
2034  * @netdev: network interface device structure
2035  *
2036  * Returns 0, this is not allowed to fail
2037  *
2038  * The close entry point is called when an interface is de-activated
2039  * by the OS.  The hardware is still under the drivers control, but
2040  * needs to be disabled.  A global MAC reset is issued to stop the
2041  * hardware, and all transmit and receive resources are freed.
2042  */
2043 static int atl1e_close(struct net_device *netdev)
2044 {
2045         struct atl1e_adapter *adapter = netdev_priv(netdev);
2046
2047         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2048         atl1e_down(adapter);
2049         atl1e_free_irq(adapter);
2050         atl1e_free_ring_resources(adapter);
2051
2052         return 0;
2053 }
2054
2055 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2056 {
2057         struct net_device *netdev = pci_get_drvdata(pdev);
2058         struct atl1e_adapter *adapter = netdev_priv(netdev);
2059         struct atl1e_hw *hw = &adapter->hw;
2060         u32 ctrl = 0;
2061         u32 mac_ctrl_data = 0;
2062         u32 wol_ctrl_data = 0;
2063         u16 mii_advertise_data = 0;
2064         u16 mii_bmsr_data = 0;
2065         u16 mii_intr_status_data = 0;
2066         u32 wufc = adapter->wol;
2067         u32 i;
2068 #ifdef CONFIG_PM
2069         int retval = 0;
2070 #endif
2071
2072         if (netif_running(netdev)) {
2073                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2074                 atl1e_down(adapter);
2075         }
2076         netif_device_detach(netdev);
2077
2078 #ifdef CONFIG_PM
2079         retval = pci_save_state(pdev);
2080         if (retval)
2081                 return retval;
2082 #endif
2083
2084         if (wufc) {
2085                 /* get link status */
2086                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2087                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2088
2089                 mii_advertise_data = ADVERTISE_10HALF;
2090
2091                 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2092                     (atl1e_write_phy_reg(hw,
2093                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2094                     (atl1e_phy_commit(hw)) != 0) {
2095                         netdev_dbg(adapter->netdev, "set phy register failed\n");
2096                         goto wol_dis;
2097                 }
2098
2099                 hw->phy_configured = false; /* re-init PHY when resume */
2100
2101                 /* turn on magic packet wol */
2102                 if (wufc & AT_WUFC_MAG)
2103                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2104
2105                 if (wufc & AT_WUFC_LNKC) {
2106                 /* if orignal link status is link, just wait for retrive link */
2107                         if (mii_bmsr_data & BMSR_LSTATUS) {
2108                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2109                                         msleep(100);
2110                                         atl1e_read_phy_reg(hw, MII_BMSR,
2111                                                         &mii_bmsr_data);
2112                                         if (mii_bmsr_data & BMSR_LSTATUS)
2113                                                 break;
2114                                 }
2115
2116                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2117                                         netdev_dbg(adapter->netdev,
2118                                                    "Link may change when suspend\n");
2119                         }
2120                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2121                         /* only link up can wake up */
2122                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2123                                 netdev_dbg(adapter->netdev,
2124                                            "read write phy register failed\n");
2125                                 goto wol_dis;
2126                         }
2127                 }
2128                 /* clear phy interrupt */
2129                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2130                 /* Config MAC Ctrl register */
2131                 mac_ctrl_data = MAC_CTRL_RX_EN;
2132                 /* set to 10/100M halt duplex */
2133                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2134                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2135                                  MAC_CTRL_PRMLEN_MASK) <<
2136                                  MAC_CTRL_PRMLEN_SHIFT);
2137
2138                 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2139
2140                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2141                 if (wufc & AT_WUFC_MAG)
2142                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2143
2144                 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2145                            mac_ctrl_data);
2146
2147                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2148                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2149                 /* pcie patch */
2150                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2151                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2152                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2153                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2154                 goto suspend_exit;
2155         }
2156 wol_dis:
2157
2158         /* WOL disabled */
2159         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2160
2161         /* pcie patch */
2162         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2163         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2164         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2165
2166         atl1e_force_ps(hw);
2167         hw->phy_configured = false; /* re-init PHY when resume */
2168
2169         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2170
2171 suspend_exit:
2172
2173         if (netif_running(netdev))
2174                 atl1e_free_irq(adapter);
2175
2176         pci_disable_device(pdev);
2177
2178         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2179
2180         return 0;
2181 }
2182
2183 #ifdef CONFIG_PM
2184 static int atl1e_resume(struct pci_dev *pdev)
2185 {
2186         struct net_device *netdev = pci_get_drvdata(pdev);
2187         struct atl1e_adapter *adapter = netdev_priv(netdev);
2188         u32 err;
2189
2190         pci_set_power_state(pdev, PCI_D0);
2191         pci_restore_state(pdev);
2192
2193         err = pci_enable_device(pdev);
2194         if (err) {
2195                 netdev_err(adapter->netdev,
2196                            "Cannot enable PCI device from suspend\n");
2197                 return err;
2198         }
2199
2200         pci_set_master(pdev);
2201
2202         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2203
2204         pci_enable_wake(pdev, PCI_D3hot, 0);
2205         pci_enable_wake(pdev, PCI_D3cold, 0);
2206
2207         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2208
2209         if (netif_running(netdev)) {
2210                 err = atl1e_request_irq(adapter);
2211                 if (err)
2212                         return err;
2213         }
2214
2215         atl1e_reset_hw(&adapter->hw);
2216
2217         if (netif_running(netdev))
2218                 atl1e_up(adapter);
2219
2220         netif_device_attach(netdev);
2221
2222         return 0;
2223 }
2224 #endif
2225
2226 static void atl1e_shutdown(struct pci_dev *pdev)
2227 {
2228         atl1e_suspend(pdev, PMSG_SUSPEND);
2229 }
2230
2231 static const struct net_device_ops atl1e_netdev_ops = {
2232         .ndo_open               = atl1e_open,
2233         .ndo_stop               = atl1e_close,
2234         .ndo_start_xmit         = atl1e_xmit_frame,
2235         .ndo_get_stats          = atl1e_get_stats,
2236         .ndo_set_rx_mode        = atl1e_set_multi,
2237         .ndo_validate_addr      = eth_validate_addr,
2238         .ndo_set_mac_address    = atl1e_set_mac_addr,
2239         .ndo_fix_features       = atl1e_fix_features,
2240         .ndo_set_features       = atl1e_set_features,
2241         .ndo_change_mtu         = atl1e_change_mtu,
2242         .ndo_do_ioctl           = atl1e_ioctl,
2243         .ndo_tx_timeout         = atl1e_tx_timeout,
2244 #ifdef CONFIG_NET_POLL_CONTROLLER
2245         .ndo_poll_controller    = atl1e_netpoll,
2246 #endif
2247
2248 };
2249
2250 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2251 {
2252         SET_NETDEV_DEV(netdev, &pdev->dev);
2253         pci_set_drvdata(pdev, netdev);
2254
2255         netdev->netdev_ops = &atl1e_netdev_ops;
2256
2257         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2258         /* MTU range: 42 - 8170 */
2259         netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2260         netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
2261                           (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2262         atl1e_set_ethtool_ops(netdev);
2263
2264         netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2265                               NETIF_F_HW_VLAN_CTAG_RX;
2266         netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_TX;
2267         /* not enabled by default */
2268         netdev->hw_features |= NETIF_F_RXALL | NETIF_F_RXFCS;
2269         return 0;
2270 }
2271
2272 /**
2273  * atl1e_probe - Device Initialization Routine
2274  * @pdev: PCI device information struct
2275  * @ent: entry in atl1e_pci_tbl
2276  *
2277  * Returns 0 on success, negative on failure
2278  *
2279  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2280  * The OS initialization, configuring of the adapter private structure,
2281  * and a hardware reset occur.
2282  */
2283 static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2284 {
2285         struct net_device *netdev;
2286         struct atl1e_adapter *adapter = NULL;
2287         static int cards_found;
2288
2289         int err = 0;
2290
2291         err = pci_enable_device(pdev);
2292         if (err) {
2293                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2294                 return err;
2295         }
2296
2297         /*
2298          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2299          * shared register for the high 32 bits, so only a single, aligned,
2300          * 4 GB physical address range can be used at a time.
2301          *
2302          * Supporting 64-bit DMA on this hardware is more trouble than it's
2303          * worth.  It is far easier to limit to 32-bit DMA than update
2304          * various kernel subsystems to support the mechanics required by a
2305          * fixed-high-32-bit system.
2306          */
2307         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2308             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2309                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2310                 goto err_dma;
2311         }
2312
2313         err = pci_request_regions(pdev, atl1e_driver_name);
2314         if (err) {
2315                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2316                 goto err_pci_reg;
2317         }
2318
2319         pci_set_master(pdev);
2320
2321         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2322         if (netdev == NULL) {
2323                 err = -ENOMEM;
2324                 goto err_alloc_etherdev;
2325         }
2326
2327         err = atl1e_init_netdev(netdev, pdev);
2328         if (err) {
2329                 netdev_err(netdev, "init netdevice failed\n");
2330                 goto err_init_netdev;
2331         }
2332         adapter = netdev_priv(netdev);
2333         adapter->bd_number = cards_found;
2334         adapter->netdev = netdev;
2335         adapter->pdev = pdev;
2336         adapter->hw.adapter = adapter;
2337         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2338         if (!adapter->hw.hw_addr) {
2339                 err = -EIO;
2340                 netdev_err(netdev, "cannot map device registers\n");
2341                 goto err_ioremap;
2342         }
2343
2344         /* init mii data */
2345         adapter->mii.dev = netdev;
2346         adapter->mii.mdio_read  = atl1e_mdio_read;
2347         adapter->mii.mdio_write = atl1e_mdio_write;
2348         adapter->mii.phy_id_mask = 0x1f;
2349         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2350
2351         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2352
2353         timer_setup(&adapter->phy_config_timer, atl1e_phy_config, 0);
2354
2355         /* get user settings */
2356         atl1e_check_options(adapter);
2357         /*
2358          * Mark all PCI regions associated with PCI device
2359          * pdev as being reserved by owner atl1e_driver_name
2360          * Enables bus-mastering on the device and calls
2361          * pcibios_set_master to do the needed arch specific settings
2362          */
2363         atl1e_setup_pcicmd(pdev);
2364         /* setup the private structure */
2365         err = atl1e_sw_init(adapter);
2366         if (err) {
2367                 netdev_err(netdev, "net device private data init failed\n");
2368                 goto err_sw_init;
2369         }
2370
2371         /* Init GPHY as early as possible due to power saving issue  */
2372         atl1e_phy_init(&adapter->hw);
2373         /* reset the controller to
2374          * put the device in a known good starting state */
2375         err = atl1e_reset_hw(&adapter->hw);
2376         if (err) {
2377                 err = -EIO;
2378                 goto err_reset;
2379         }
2380
2381         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2382                 err = -EIO;
2383                 netdev_err(netdev, "get mac address failed\n");
2384                 goto err_eeprom;
2385         }
2386
2387         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2388         netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2389
2390         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2391         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2392         netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2393         err = register_netdev(netdev);
2394         if (err) {
2395                 netdev_err(netdev, "register netdevice failed\n");
2396                 goto err_register;
2397         }
2398
2399         /* assume we have no link for now */
2400         netif_stop_queue(netdev);
2401         netif_carrier_off(netdev);
2402
2403         cards_found++;
2404
2405         return 0;
2406
2407 err_reset:
2408 err_register:
2409 err_sw_init:
2410 err_eeprom:
2411         pci_iounmap(pdev, adapter->hw.hw_addr);
2412 err_init_netdev:
2413 err_ioremap:
2414         free_netdev(netdev);
2415 err_alloc_etherdev:
2416         pci_release_regions(pdev);
2417 err_pci_reg:
2418 err_dma:
2419         pci_disable_device(pdev);
2420         return err;
2421 }
2422
2423 /**
2424  * atl1e_remove - Device Removal Routine
2425  * @pdev: PCI device information struct
2426  *
2427  * atl1e_remove is called by the PCI subsystem to alert the driver
2428  * that it should release a PCI device.  The could be caused by a
2429  * Hot-Plug event, or because the driver is going to be removed from
2430  * memory.
2431  */
2432 static void atl1e_remove(struct pci_dev *pdev)
2433 {
2434         struct net_device *netdev = pci_get_drvdata(pdev);
2435         struct atl1e_adapter *adapter = netdev_priv(netdev);
2436
2437         /*
2438          * flush_scheduled work may reschedule our watchdog task, so
2439          * explicitly disable watchdog tasks from being rescheduled
2440          */
2441         set_bit(__AT_DOWN, &adapter->flags);
2442
2443         atl1e_del_timer(adapter);
2444         atl1e_cancel_work(adapter);
2445
2446         unregister_netdev(netdev);
2447         atl1e_free_ring_resources(adapter);
2448         atl1e_force_ps(&adapter->hw);
2449         pci_iounmap(pdev, adapter->hw.hw_addr);
2450         pci_release_regions(pdev);
2451         free_netdev(netdev);
2452         pci_disable_device(pdev);
2453 }
2454
2455 /**
2456  * atl1e_io_error_detected - called when PCI error is detected
2457  * @pdev: Pointer to PCI device
2458  * @state: The current pci connection state
2459  *
2460  * This function is called after a PCI bus error affecting
2461  * this device has been detected.
2462  */
2463 static pci_ers_result_t
2464 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2465 {
2466         struct net_device *netdev = pci_get_drvdata(pdev);
2467         struct atl1e_adapter *adapter = netdev_priv(netdev);
2468
2469         netif_device_detach(netdev);
2470
2471         if (state == pci_channel_io_perm_failure)
2472                 return PCI_ERS_RESULT_DISCONNECT;
2473
2474         if (netif_running(netdev))
2475                 atl1e_down(adapter);
2476
2477         pci_disable_device(pdev);
2478
2479         /* Request a slot slot reset. */
2480         return PCI_ERS_RESULT_NEED_RESET;
2481 }
2482
2483 /**
2484  * atl1e_io_slot_reset - called after the pci bus has been reset.
2485  * @pdev: Pointer to PCI device
2486  *
2487  * Restart the card from scratch, as if from a cold-boot. Implementation
2488  * resembles the first-half of the e1000_resume routine.
2489  */
2490 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2491 {
2492         struct net_device *netdev = pci_get_drvdata(pdev);
2493         struct atl1e_adapter *adapter = netdev_priv(netdev);
2494
2495         if (pci_enable_device(pdev)) {
2496                 netdev_err(adapter->netdev,
2497                            "Cannot re-enable PCI device after reset\n");
2498                 return PCI_ERS_RESULT_DISCONNECT;
2499         }
2500         pci_set_master(pdev);
2501
2502         pci_enable_wake(pdev, PCI_D3hot, 0);
2503         pci_enable_wake(pdev, PCI_D3cold, 0);
2504
2505         atl1e_reset_hw(&adapter->hw);
2506
2507         return PCI_ERS_RESULT_RECOVERED;
2508 }
2509
2510 /**
2511  * atl1e_io_resume - called when traffic can start flowing again.
2512  * @pdev: Pointer to PCI device
2513  *
2514  * This callback is called when the error recovery driver tells us that
2515  * its OK to resume normal operation. Implementation resembles the
2516  * second-half of the atl1e_resume routine.
2517  */
2518 static void atl1e_io_resume(struct pci_dev *pdev)
2519 {
2520         struct net_device *netdev = pci_get_drvdata(pdev);
2521         struct atl1e_adapter *adapter = netdev_priv(netdev);
2522
2523         if (netif_running(netdev)) {
2524                 if (atl1e_up(adapter)) {
2525                         netdev_err(adapter->netdev,
2526                                    "can't bring device back up after reset\n");
2527                         return;
2528                 }
2529         }
2530
2531         netif_device_attach(netdev);
2532 }
2533
2534 static const struct pci_error_handlers atl1e_err_handler = {
2535         .error_detected = atl1e_io_error_detected,
2536         .slot_reset = atl1e_io_slot_reset,
2537         .resume = atl1e_io_resume,
2538 };
2539
2540 static struct pci_driver atl1e_driver = {
2541         .name     = atl1e_driver_name,
2542         .id_table = atl1e_pci_tbl,
2543         .probe    = atl1e_probe,
2544         .remove   = atl1e_remove,
2545         /* Power Management Hooks */
2546 #ifdef CONFIG_PM
2547         .suspend  = atl1e_suspend,
2548         .resume   = atl1e_resume,
2549 #endif
2550         .shutdown = atl1e_shutdown,
2551         .err_handler = &atl1e_err_handler
2552 };
2553
2554 module_pci_driver(atl1e_driver);