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

   1 /*
   2  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1e.h"
  23
  24 #define DRV_VERSION "1.0.0.7-NAPI"
  25
  26 char atl1e_driver_name[] = "ATL1E";
  27 char atl1e_driver_version[] = DRV_VERSION;
  28 #define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
  29 /*
  30  * atl1e_pci_tbl - PCI Device ID Table
  31  *
  32  * Wildcard entries (PCI_ANY_ID) should come last
  33  * Last entry must be all 0s
  34  *
  35  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  36  *   Class, Class Mask, private data (not used) }
  37  */
  38 static const struct pci_device_id atl1e_pci_tbl[] = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  45
  46 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(DRV_VERSION);
  50
  51 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  52
  53 static const u16
  54 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  55 {
  56         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  57         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  58         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  59         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  60 };
  61
  62 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  63 {
  64         REG_RXF0_BASE_ADDR_HI,
  65         REG_RXF1_BASE_ADDR_HI,
  66         REG_RXF2_BASE_ADDR_HI,
  67         REG_RXF3_BASE_ADDR_HI
  68 };
  69
  70 static const u16
  71 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  72 {
  73         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  74         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  75         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  76         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  77 };
  78
  79 static const u16
  80 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  81 {
  82         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  83         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  84         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  85         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  86 };
  87
  88 static const u16 atl1e_pay_load_size[] = {
  89         128, 256, 512, 1024, 2048, 4096,
  90 };
  91
  92 /**
  93  * atl1e_irq_enable - Enable default interrupt generation settings
  94  * @adapter: board private structure
  95  */
  96 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  97 {
  98         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  99                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 100                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
 101                 AT_WRITE_FLUSH(&adapter->hw);
 102         }
 103 }
 104
 105 /**
 106  * atl1e_irq_disable - Mask off interrupt generation on the NIC
 107  * @adapter: board private structure
 108  */
 109 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
 110 {
 111         atomic_inc(&adapter->irq_sem);
 112         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 113         AT_WRITE_FLUSH(&adapter->hw);
 114         synchronize_irq(adapter->pdev->irq);
 115 }
 116
 117 /**
 118  * atl1e_irq_reset - reset interrupt confiure on the NIC
 119  * @adapter: board private structure
 120  */
 121 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 122 {
 123         atomic_set(&adapter->irq_sem, 0);
 124         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 125         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 126         AT_WRITE_FLUSH(&adapter->hw);
 127 }
 128
 129 /**
 130  * atl1e_phy_config - Timer Call-back
 131  * @data: pointer to netdev cast into an unsigned long
 132  */
 133 static void atl1e_phy_config(unsigned long data)
 134 {
 135         struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
 136         struct atl1e_hw *hw = &adapter->hw;
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&adapter->mdio_lock, flags);
 140         atl1e_restart_autoneg(hw);
 141         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 142 }
 143
 144 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 145 {
 146
 147         WARN_ON(in_interrupt());
 148         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 149                 msleep(1);
 150         atl1e_down(adapter);
 151         atl1e_up(adapter);
 152         clear_bit(__AT_RESETTING, &adapter->flags);
 153 }
 154
 155 static void atl1e_reset_task(struct work_struct *work)
 156 {
 157         struct atl1e_adapter *adapter;
 158         adapter = container_of(work, struct atl1e_adapter, reset_task);
 159
 160         atl1e_reinit_locked(adapter);
 161 }
 162
 163 static int atl1e_check_link(struct atl1e_adapter *adapter)
 164 {
 165         struct atl1e_hw *hw = &adapter->hw;
 166         struct net_device *netdev = adapter->netdev;
 167         int err = 0;
 168         u16 speed, duplex, phy_data;
 169
 170         /* MII_BMSR must read twice */
 171         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 172         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 173         if ((phy_data & BMSR_LSTATUS) == 0) {
 174                 /* link down */
 175                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 176                         u32 value;
 177                         /* disable rx */
 178                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 179                         value &= ~MAC_CTRL_RX_EN;
 180                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 181                         adapter->link_speed = SPEED_0;
 182                         netif_carrier_off(netdev);
 183                         netif_stop_queue(netdev);
 184                 }
 185         } else {
 186                 /* Link Up */
 187                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 188                 if (unlikely(err))
 189                         return err;
 190
 191                 /* link result is our setting */
 192                 if (adapter->link_speed != speed ||
 193                     adapter->link_duplex != duplex) {
 194                         adapter->link_speed  = speed;
 195                         adapter->link_duplex = duplex;
 196                         atl1e_setup_mac_ctrl(adapter);
 197                         netdev_info(netdev,
 198                                     "NIC Link is Up <%d Mbps %s Duplex>\n",
 199                                     adapter->link_speed,
 200                                     adapter->link_duplex == FULL_DUPLEX ?
 201                                     "Full" : "Half");
 202                 }
 203
 204                 if (!netif_carrier_ok(netdev)) {
 205                         /* Link down -> Up */
 206                         netif_carrier_on(netdev);
 207                         netif_wake_queue(netdev);
 208                 }
 209         }
 210         return 0;
 211 }
 212
 213 /**
 214  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 215  * @netdev: network interface device structure
 216  */
 217 static void atl1e_link_chg_task(struct work_struct *work)
 218 {
 219         struct atl1e_adapter *adapter;
 220         unsigned long flags;
 221
 222         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 223         spin_lock_irqsave(&adapter->mdio_lock, flags);
 224         atl1e_check_link(adapter);
 225         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 226 }
 227
 228 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 229 {
 230         struct net_device *netdev = adapter->netdev;
 231         u16 phy_data = 0;
 232         u16 link_up = 0;
 233
 234         spin_lock(&adapter->mdio_lock);
 235         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 236         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 237         spin_unlock(&adapter->mdio_lock);
 238         link_up = phy_data & BMSR_LSTATUS;
 239         /* notify upper layer link down ASAP */
 240         if (!link_up) {
 241                 if (netif_carrier_ok(netdev)) {
 242                         /* old link state: Up */
 243                         netdev_info(netdev, "NIC Link is Down\n");
 244                         adapter->link_speed = SPEED_0;
 245                         netif_stop_queue(netdev);
 246                 }
 247         }
 248         schedule_work(&adapter->link_chg_task);
 249 }
 250
 251 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 252 {
 253         del_timer_sync(&adapter->phy_config_timer);
 254 }
 255
 256 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 257 {
 258         cancel_work_sync(&adapter->reset_task);
 259         cancel_work_sync(&adapter->link_chg_task);
 260 }
 261
 262 /**
 263  * atl1e_tx_timeout - Respond to a Tx Hang
 264  * @netdev: network interface device structure
 265  */
 266 static void atl1e_tx_timeout(struct net_device *netdev)
 267 {
 268         struct atl1e_adapter *adapter = netdev_priv(netdev);
 269
 270         /* Do the reset outside of interrupt context */
 271         schedule_work(&adapter->reset_task);
 272 }
 273
 274 /**
 275  * atl1e_set_multi - Multicast and Promiscuous mode set
 276  * @netdev: network interface device structure
 277  *
 278  * The set_multi entry point is called whenever the multicast address
 279  * list or the network interface flags are updated.  This routine is
 280  * responsible for configuring the hardware for proper multicast,
 281  * promiscuous mode, and all-multi behavior.
 282  */
 283 static void atl1e_set_multi(struct net_device *netdev)
 284 {
 285         struct atl1e_adapter *adapter = netdev_priv(netdev);
 286         struct atl1e_hw *hw = &adapter->hw;
 287         struct netdev_hw_addr *ha;
 288         u32 mac_ctrl_data = 0;
 289         u32 hash_value;
 290
 291         /* Check for Promiscuous and All Multicast modes */
 292         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 293
 294         if (netdev->flags & IFF_PROMISC) {
 295                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 296         } else if (netdev->flags & IFF_ALLMULTI) {
 297                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 298                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 299         } else {
 300                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 301         }
 302
 303         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 304
 305         /* clear the old settings from the multicast hash table */
 306         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 307         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 308
 309         /* comoute mc addresses' hash value ,and put it into hash table */
 310         netdev_for_each_mc_addr(ha, netdev) {
 311                 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 312                 atl1e_hash_set(hw, hash_value);
 313         }
 314 }
 315
 316 static void __atl1e_rx_mode(netdev_features_t features, u32 *mac_ctrl_data)
 317 {
 318
 319         if (features & NETIF_F_RXALL) {
 320                 /* enable RX of ALL frames */
 321                 *mac_ctrl_data |= MAC_CTRL_DBG;
 322         } else {
 323                 /* disable RX of ALL frames */
 324                 *mac_ctrl_data &= ~MAC_CTRL_DBG;
 325         }
 326 }
 327
 328 static void atl1e_rx_mode(struct net_device *netdev,
 329         netdev_features_t features)
 330 {
 331         struct atl1e_adapter *adapter = netdev_priv(netdev);
 332         u32 mac_ctrl_data = 0;
 333
 334         netdev_dbg(adapter->netdev, "%s\n", __func__);
 335
 336         atl1e_irq_disable(adapter);
 337         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 338         __atl1e_rx_mode(features, &mac_ctrl_data);
 339         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 340         atl1e_irq_enable(adapter);
 341 }
 342
 343
 344 static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 345 {
 346         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 347                 /* enable VLAN tag insert/strip */
 348                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 349         } else {
 350                 /* disable VLAN tag insert/strip */
 351                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 352         }
 353 }
 354
 355 static void atl1e_vlan_mode(struct net_device *netdev,
 356         netdev_features_t features)
 357 {
 358         struct atl1e_adapter *adapter = netdev_priv(netdev);
 359         u32 mac_ctrl_data = 0;
 360
 361         netdev_dbg(adapter->netdev, "%s\n", __func__);
 362
 363         atl1e_irq_disable(adapter);
 364         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 365         __atl1e_vlan_mode(features, &mac_ctrl_data);
 366         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 367         atl1e_irq_enable(adapter);
 368 }
 369
 370 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 371 {
 372         netdev_dbg(adapter->netdev, "%s\n", __func__);
 373         atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
 374 }
 375
 376 /**
 377  * atl1e_set_mac - Change the Ethernet Address of the NIC
 378  * @netdev: network interface device structure
 379  * @p: pointer to an address structure
 380  *
 381  * Returns 0 on success, negative on failure
 382  */
 383 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 384 {
 385         struct atl1e_adapter *adapter = netdev_priv(netdev);
 386         struct sockaddr *addr = p;
 387
 388         if (!is_valid_ether_addr(addr->sa_data))
 389                 return -EADDRNOTAVAIL;
 390
 391         if (netif_running(netdev))
 392                 return -EBUSY;
 393
 394         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 395         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 396
 397         atl1e_hw_set_mac_addr(&adapter->hw);
 398
 399         return 0;
 400 }
 401
 402 static netdev_features_t atl1e_fix_features(struct net_device *netdev,
 403         netdev_features_t features)
 404 {
 405         /*
 406          * Since there is no support for separate rx/tx vlan accel
 407          * enable/disable make sure tx flag is always in same state as rx.
 408          */
 409         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 410                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 411         else
 412                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 413
 414         return features;
 415 }
 416
 417 static int atl1e_set_features(struct net_device *netdev,
 418         netdev_features_t features)
 419 {
 420         netdev_features_t changed = netdev->features ^ features;
 421
 422         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 423                 atl1e_vlan_mode(netdev, features);
 424
 425         if (changed & NETIF_F_RXALL)
 426                 atl1e_rx_mode(netdev, features);
 427
 428
 429         return 0;
 430 }
 431
 432 /**
 433  * atl1e_change_mtu - Change the Maximum Transfer Unit
 434  * @netdev: network interface device structure
 435  * @new_mtu: new value for maximum frame size
 436  *
 437  * Returns 0 on success, negative on failure
 438  */
 439 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 440 {
 441         struct atl1e_adapter *adapter = netdev_priv(netdev);
 442         int old_mtu   = netdev->mtu;
 443         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 444
 445         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 446                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 447                 netdev_warn(adapter->netdev, "invalid MTU setting\n");
 448                 return -EINVAL;
 449         }
 450         /* set MTU */
 451         if (old_mtu != new_mtu && netif_running(netdev)) {
 452                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 453                         msleep(1);
 454                 netdev->mtu = new_mtu;
 455                 adapter->hw.max_frame_size = new_mtu;
 456                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 457                 atl1e_down(adapter);
 458                 atl1e_up(adapter);
 459                 clear_bit(__AT_RESETTING, &adapter->flags);
 460         }
 461         return 0;
 462 }
 463
 464 /*
 465  *  caller should hold mdio_lock
 466  */
 467 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 468 {
 469         struct atl1e_adapter *adapter = netdev_priv(netdev);
 470         u16 result;
 471
 472         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 473         return result;
 474 }
 475
 476 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 477                              int reg_num, int val)
 478 {
 479         struct atl1e_adapter *adapter = netdev_priv(netdev);
 480
 481         if (atl1e_write_phy_reg(&adapter->hw,
 482                                 reg_num & MDIO_REG_ADDR_MASK, val))
 483                 netdev_err(netdev, "write phy register failed\n");
 484 }
 485
 486 static int atl1e_mii_ioctl(struct net_device *netdev,
 487                            struct ifreq *ifr, int cmd)
 488 {
 489         struct atl1e_adapter *adapter = netdev_priv(netdev);
 490         struct mii_ioctl_data *data = if_mii(ifr);
 491         unsigned long flags;
 492         int retval = 0;
 493
 494         if (!netif_running(netdev))
 495                 return -EINVAL;
 496
 497         spin_lock_irqsave(&adapter->mdio_lock, flags);
 498         switch (cmd) {
 499         case SIOCGMIIPHY:
 500                 data->phy_id = 0;
 501                 break;
 502
 503         case SIOCGMIIREG:
 504                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 505                                     &data->val_out)) {
 506                         retval = -EIO;
 507                         goto out;
 508                 }
 509                 break;
 510
 511         case SIOCSMIIREG:
 512                 if (data->reg_num & ~(0x1F)) {
 513                         retval = -EFAULT;
 514                         goto out;
 515                 }
 516
 517                 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 518                            data->reg_num, data->val_in);
 519                 if (atl1e_write_phy_reg(&adapter->hw,
 520                                      data->reg_num, data->val_in)) {
 521                         retval = -EIO;
 522                         goto out;
 523                 }
 524                 break;
 525
 526         default:
 527                 retval = -EOPNOTSUPP;
 528                 break;
 529         }
 530 out:
 531         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 532         return retval;
 533
 534 }
 535
 536 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 537 {
 538         switch (cmd) {
 539         case SIOCGMIIPHY:
 540         case SIOCGMIIREG:
 541         case SIOCSMIIREG:
 542                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 543         default:
 544                 return -EOPNOTSUPP;
 545         }
 546 }
 547
 548 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 549 {
 550         u16 cmd;
 551
 552         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 553         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 554         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 555         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 556
 557         /*
 558          * some motherboards BIOS(PXE/EFI) driver may set PME
 559          * while they transfer control to OS (Windows/Linux)
 560          * so we should clear this bit before NIC work normally
 561          */
 562         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 563         msleep(1);
 564 }
 565
 566 /**
 567  * atl1e_alloc_queues - Allocate memory for all rings
 568  * @adapter: board private structure to initialize
 569  *
 570  */
 571 static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
 572 {
 573         return 0;
 574 }
 575
 576 /**
 577  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 578  * @adapter: board private structure to initialize
 579  *
 580  * atl1e_sw_init initializes the Adapter private data structure.
 581  * Fields are initialized based on PCI device information and
 582  * OS network device settings (MTU size).
 583  */
 584 static int atl1e_sw_init(struct atl1e_adapter *adapter)
 585 {
 586         struct atl1e_hw *hw   = &adapter->hw;
 587         struct pci_dev  *pdev = adapter->pdev;
 588         u32 phy_status_data = 0;
 589
 590         adapter->wol = 0;
 591         adapter->link_speed = SPEED_0;   /* hardware init */
 592         adapter->link_duplex = FULL_DUPLEX;
 593         adapter->num_rx_queues = 1;
 594
 595         /* PCI config space info */
 596         hw->vendor_id = pdev->vendor;
 597         hw->device_id = pdev->device;
 598         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 599         hw->subsystem_id = pdev->subsystem_device;
 600         hw->revision_id  = pdev->revision;
 601
 602         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 603
 604         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 605         /* nic type */
 606         if (hw->revision_id >= 0xF0) {
 607                 hw->nic_type = athr_l2e_revB;
 608         } else {
 609                 if (phy_status_data & PHY_STATUS_100M)
 610                         hw->nic_type = athr_l1e;
 611                 else
 612                         hw->nic_type = athr_l2e_revA;
 613         }
 614
 615         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 616
 617         if (phy_status_data & PHY_STATUS_EMI_CA)
 618                 hw->emi_ca = true;
 619         else
 620                 hw->emi_ca = false;
 621
 622         hw->phy_configured = false;
 623         hw->preamble_len = 7;
 624         hw->max_frame_size = adapter->netdev->mtu;
 625         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 626                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 627
 628         hw->rrs_type = atl1e_rrs_disable;
 629         hw->indirect_tab = 0;
 630         hw->base_cpu = 0;
 631
 632         /* need confirm */
 633
 634         hw->ict = 50000;                 /* 100ms */
 635         hw->smb_timer = 200000;          /* 200ms  */
 636         hw->tpd_burst = 5;
 637         hw->rrd_thresh = 1;
 638         hw->tpd_thresh = adapter->tx_ring.count / 2;
 639         hw->rx_count_down = 4;  /* 2us resolution */
 640         hw->tx_count_down = hw->imt * 4 / 3;
 641         hw->dmar_block = atl1e_dma_req_1024;
 642         hw->dmaw_block = atl1e_dma_req_1024;
 643         hw->dmar_dly_cnt = 15;
 644         hw->dmaw_dly_cnt = 4;
 645
 646         if (atl1e_alloc_queues(adapter)) {
 647                 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 648                 return -ENOMEM;
 649         }
 650
 651         atomic_set(&adapter->irq_sem, 1);
 652         spin_lock_init(&adapter->mdio_lock);
 653         spin_lock_init(&adapter->tx_lock);
 654
 655         set_bit(__AT_DOWN, &adapter->flags);
 656
 657         return 0;
 658 }
 659
 660 /**
 661  * atl1e_clean_tx_ring - Free Tx-skb
 662  * @adapter: board private structure
 663  */
 664 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 665 {
 666         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 667         struct atl1e_tx_buffer *tx_buffer = NULL;
 668         struct pci_dev *pdev = adapter->pdev;
 669         u16 index, ring_count;
 670
 671         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 672                 return;
 673
 674         ring_count = tx_ring->count;
 675         /* first unmmap dma */
 676         for (index = 0; index < ring_count; index++) {
 677                 tx_buffer = &tx_ring->tx_buffer[index];
 678                 if (tx_buffer->dma) {
 679                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 680                                 pci_unmap_single(pdev, tx_buffer->dma,
 681                                         tx_buffer->length, PCI_DMA_TODEVICE);
 682                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 683                                 pci_unmap_page(pdev, tx_buffer->dma,
 684                                         tx_buffer->length, PCI_DMA_TODEVICE);
 685                         tx_buffer->dma = 0;
 686                 }
 687         }
 688         /* second free skb */
 689         for (index = 0; index < ring_count; index++) {
 690                 tx_buffer = &tx_ring->tx_buffer[index];
 691                 if (tx_buffer->skb) {
 692                         dev_kfree_skb_any(tx_buffer->skb);
 693                         tx_buffer->skb = NULL;
 694                 }
 695         }
 696         /* Zero out Tx-buffers */
 697         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 698                                 ring_count);
 699         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 700                                 ring_count);
 701 }
 702
 703 /**
 704  * atl1e_clean_rx_ring - Free rx-reservation skbs
 705  * @adapter: board private structure
 706  */
 707 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 708 {
 709         struct atl1e_rx_ring *rx_ring =
 710                 &adapter->rx_ring;
 711         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 712         u16 i, j;
 713
 714
 715         if (adapter->ring_vir_addr == NULL)
 716                 return;
 717         /* Zero out the descriptor ring */
 718         for (i = 0; i < adapter->num_rx_queues; i++) {
 719                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 720                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 721                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 722                                                 rx_ring->real_page_size);
 723                         }
 724                 }
 725         }
 726 }
 727
 728 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 729 {
 730         *ring_size = ((u32)(adapter->tx_ring.count *
 731                      sizeof(struct atl1e_tpd_desc) + 7
 732                         /* tx ring, qword align */
 733                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 734                         adapter->num_rx_queues + 31
 735                         /* rx ring,  32 bytes align */
 736                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 737                         sizeof(u32) + 3));
 738                         /* tx, rx cmd, dword align   */
 739 }
 740
 741 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 742 {
 743         struct atl1e_rx_ring *rx_ring = NULL;
 744
 745         rx_ring = &adapter->rx_ring;
 746
 747         rx_ring->real_page_size = adapter->rx_ring.page_size
 748                                  + adapter->hw.max_frame_size
 749                                  + ETH_HLEN + VLAN_HLEN
 750                                  + ETH_FCS_LEN;
 751         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 752         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 753
 754         adapter->ring_vir_addr = NULL;
 755         adapter->rx_ring.desc = NULL;
 756         rwlock_init(&adapter->tx_ring.tx_lock);
 757 }
 758
 759 /*
 760  * Read / Write Ptr Initialize:
 761  */
 762 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 763 {
 764         struct atl1e_tx_ring *tx_ring = NULL;
 765         struct atl1e_rx_ring *rx_ring = NULL;
 766         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 767         int i, j;
 768
 769         tx_ring = &adapter->tx_ring;
 770         rx_ring = &adapter->rx_ring;
 771         rx_page_desc = rx_ring->rx_page_desc;
 772
 773         tx_ring->next_to_use = 0;
 774         atomic_set(&tx_ring->next_to_clean, 0);
 775
 776         for (i = 0; i < adapter->num_rx_queues; i++) {
 777                 rx_page_desc[i].rx_using  = 0;
 778                 rx_page_desc[i].rx_nxseq = 0;
 779                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 780                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 781                         rx_page_desc[i].rx_page[j].read_offset = 0;
 782                 }
 783         }
 784 }
 785
 786 /**
 787  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 788  * @adapter: board private structure
 789  *
 790  * Free all transmit software resources
 791  */
 792 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 793 {
 794         struct pci_dev *pdev = adapter->pdev;
 795
 796         atl1e_clean_tx_ring(adapter);
 797         atl1e_clean_rx_ring(adapter);
 798
 799         if (adapter->ring_vir_addr) {
 800                 pci_free_consistent(pdev, adapter->ring_size,
 801                                 adapter->ring_vir_addr, adapter->ring_dma);
 802                 adapter->ring_vir_addr = NULL;
 803         }
 804
 805         if (adapter->tx_ring.tx_buffer) {
 806                 kfree(adapter->tx_ring.tx_buffer);
 807                 adapter->tx_ring.tx_buffer = NULL;
 808         }
 809 }
 810
 811 /**
 812  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 813  * @adapter: board private structure
 814  *
 815  * Return 0 on success, negative on failure
 816  */
 817 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 818 {
 819         struct pci_dev *pdev = adapter->pdev;
 820         struct atl1e_tx_ring *tx_ring;
 821         struct atl1e_rx_ring *rx_ring;
 822         struct atl1e_rx_page_desc  *rx_page_desc;
 823         int size, i, j;
 824         u32 offset = 0;
 825         int err = 0;
 826
 827         if (adapter->ring_vir_addr != NULL)
 828                 return 0; /* alloced already */
 829
 830         tx_ring = &adapter->tx_ring;
 831         rx_ring = &adapter->rx_ring;
 832
 833         /* real ring DMA buffer */
 834
 835         size = adapter->ring_size;
 836         adapter->ring_vir_addr = pci_zalloc_consistent(pdev, adapter->ring_size,
 837                                                        &adapter->ring_dma);
 838         if (adapter->ring_vir_addr == NULL) {
 839                 netdev_err(adapter->netdev,
 840                            "pci_alloc_consistent failed, size = D%d\n", size);
 841                 return -ENOMEM;
 842         }
 843
 844         rx_page_desc = rx_ring->rx_page_desc;
 845
 846         /* Init TPD Ring */
 847         tx_ring->dma = roundup(adapter->ring_dma, 8);
 848         offset = tx_ring->dma - adapter->ring_dma;
 849         tx_ring->desc = adapter->ring_vir_addr + offset;
 850         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 851         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 852         if (tx_ring->tx_buffer == NULL) {
 853                 err = -ENOMEM;
 854                 goto failed;
 855         }
 856
 857         /* Init RXF-Pages */
 858         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 859         offset = roundup(offset, 32);
 860
 861         for (i = 0; i < adapter->num_rx_queues; i++) {
 862                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 863                         rx_page_desc[i].rx_page[j].dma =
 864                                 adapter->ring_dma + offset;
 865                         rx_page_desc[i].rx_page[j].addr =
 866                                 adapter->ring_vir_addr + offset;
 867                         offset += rx_ring->real_page_size;
 868                 }
 869         }
 870
 871         /* Init CMB dma address */
 872         tx_ring->cmb_dma = adapter->ring_dma + offset;
 873         tx_ring->cmb = adapter->ring_vir_addr + offset;
 874         offset += sizeof(u32);
 875
 876         for (i = 0; i < adapter->num_rx_queues; i++) {
 877                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 878                         rx_page_desc[i].rx_page[j].write_offset_dma =
 879                                 adapter->ring_dma + offset;
 880                         rx_page_desc[i].rx_page[j].write_offset_addr =
 881                                 adapter->ring_vir_addr + offset;
 882                         offset += sizeof(u32);
 883                 }
 884         }
 885
 886         if (unlikely(offset > adapter->ring_size)) {
 887                 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 888                            offset, adapter->ring_size);
 889                 err = -1;
 890                 goto failed;
 891         }
 892
 893         return 0;
 894 failed:
 895         if (adapter->ring_vir_addr != NULL) {
 896                 pci_free_consistent(pdev, adapter->ring_size,
 897                                 adapter->ring_vir_addr, adapter->ring_dma);
 898                 adapter->ring_vir_addr = NULL;
 899         }
 900         return err;
 901 }
 902
 903 static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
 904 {
 905
 906         struct atl1e_hw *hw = &adapter->hw;
 907         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
 908         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 909         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 910         int i, j;
 911
 912         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 913                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 914         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 915                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 916         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 917         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 918                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 919
 920         rx_page_desc = rx_ring->rx_page_desc;
 921         /* RXF Page Physical address / Page Length */
 922         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 923                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 924                                  (u32)((adapter->ring_dma &
 925                                  AT_DMA_HI_ADDR_MASK) >> 32));
 926                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 927                         u32 page_phy_addr;
 928                         u32 offset_phy_addr;
 929
 930                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 931                         offset_phy_addr =
 932                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 933
 934                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 935                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 936                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 937                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 938                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 939                 }
 940         }
 941         /* Page Length */
 942         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 943         /* Load all of base address above */
 944         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 945 }
 946
 947 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 948 {
 949         struct atl1e_hw *hw = &adapter->hw;
 950         u32 dev_ctrl_data = 0;
 951         u32 max_pay_load = 0;
 952         u32 jumbo_thresh = 0;
 953         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 954
 955         /* configure TXQ param */
 956         if (hw->nic_type != athr_l2e_revB) {
 957                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 958                 if (hw->max_frame_size <= 1500) {
 959                         jumbo_thresh = hw->max_frame_size + extra_size;
 960                 } else if (hw->max_frame_size < 6*1024) {
 961                         jumbo_thresh =
 962                                 (hw->max_frame_size + extra_size) * 2 / 3;
 963                 } else {
 964                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 965                 }
 966                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 967         }
 968
 969         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 970
 971         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 972                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 973
 974         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 975
 976         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 977                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 978         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 979
 980         if (hw->nic_type != athr_l2e_revB)
 981                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 982                               atl1e_pay_load_size[hw->dmar_block]);
 983         /* enable TXQ */
 984         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 985                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 986                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 987                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 988 }
 989
 990 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 991 {
 992         struct atl1e_hw *hw = &adapter->hw;
 993         u32 rxf_len  = 0;
 994         u32 rxf_low  = 0;
 995         u32 rxf_high = 0;
 996         u32 rxf_thresh_data = 0;
 997         u32 rxq_ctrl_data = 0;
 998
 999         if (hw->nic_type != athr_l2e_revB) {
1000                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
1001                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
1002                               RXQ_JMBOSZ_TH_SHIFT |
1003                               (1 & RXQ_JMBO_LKAH_MASK) <<
1004                               RXQ_JMBO_LKAH_SHIFT));
1005
1006                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
1007                 rxf_high = rxf_len * 4 / 5;
1008                 rxf_low  = rxf_len / 5;
1009                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
1010                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1011                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
1012                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1013
1014                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
1015         }
1016
1017         /* RRS */
1018         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1019         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1020
1021         if (hw->rrs_type & atl1e_rrs_ipv4)
1022                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1023
1024         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1025                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1026
1027         if (hw->rrs_type & atl1e_rrs_ipv6)
1028                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1029
1030         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1031                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1032
1033         if (hw->rrs_type != atl1e_rrs_disable)
1034                 rxq_ctrl_data |=
1035                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1036
1037         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1038                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1039
1040         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1041 }
1042
1043 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1044 {
1045         struct atl1e_hw *hw = &adapter->hw;
1046         u32 dma_ctrl_data = 0;
1047
1048         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1049         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1050                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1051         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1052                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1053         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1054         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1055                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1056         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1057                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1058
1059         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1060 }
1061
1062 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1063 {
1064         u32 value;
1065         struct atl1e_hw *hw = &adapter->hw;
1066         struct net_device *netdev = adapter->netdev;
1067
1068         /* Config MAC CTRL Register */
1069         value = MAC_CTRL_TX_EN |
1070                 MAC_CTRL_RX_EN ;
1071
1072         if (FULL_DUPLEX == adapter->link_duplex)
1073                 value |= MAC_CTRL_DUPLX;
1074
1075         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1076                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1077                           MAC_CTRL_SPEED_SHIFT);
1078         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1079
1080         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1081         value |= (((u32)adapter->hw.preamble_len &
1082                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1083
1084         __atl1e_vlan_mode(netdev->features, &value);
1085
1086         value |= MAC_CTRL_BC_EN;
1087         if (netdev->flags & IFF_PROMISC)
1088                 value |= MAC_CTRL_PROMIS_EN;
1089         if (netdev->flags & IFF_ALLMULTI)
1090                 value |= MAC_CTRL_MC_ALL_EN;
1091         if (netdev->features & NETIF_F_RXALL)
1092                 value |= MAC_CTRL_DBG;
1093         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1094 }
1095
1096 /**
1097  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1098  * @adapter: board private structure
1099  *
1100  * Configure the Tx /Rx unit of the MAC after a reset.
1101  */
1102 static int atl1e_configure(struct atl1e_adapter *adapter)
1103 {
1104         struct atl1e_hw *hw = &adapter->hw;
1105
1106         u32 intr_status_data = 0;
1107
1108         /* clear interrupt status */
1109         AT_WRITE_REG(hw, REG_ISR, ~0);
1110
1111         /* 1. set MAC Address */
1112         atl1e_hw_set_mac_addr(hw);
1113
1114         /* 2. Init the Multicast HASH table done by set_muti */
1115
1116         /* 3. Clear any WOL status */
1117         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1118
1119         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1120          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1121          *    High 32bits memory */
1122         atl1e_configure_des_ring(adapter);
1123
1124         /* 5. set Interrupt Moderator Timer */
1125         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1126         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1127         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1128                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1129
1130         /* 6. rx/tx threshold to trig interrupt */
1131         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1132         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1133         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1134         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1135
1136         /* 7. set Interrupt Clear Timer */
1137         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1138
1139         /* 8. set MTU */
1140         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1141                         VLAN_HLEN + ETH_FCS_LEN);
1142
1143         /* 9. config TXQ early tx threshold */
1144         atl1e_configure_tx(adapter);
1145
1146         /* 10. config RXQ */
1147         atl1e_configure_rx(adapter);
1148
1149         /* 11. config  DMA Engine */
1150         atl1e_configure_dma(adapter);
1151
1152         /* 12. smb timer to trig interrupt */
1153         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1154
1155         intr_status_data = AT_READ_REG(hw, REG_ISR);
1156         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1157                 netdev_err(adapter->netdev,
1158                            "atl1e_configure failed, PCIE phy link down\n");
1159                 return -1;
1160         }
1161
1162         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1163         return 0;
1164 }
1165
1166 /**
1167  * atl1e_get_stats - Get System Network Statistics
1168  * @netdev: network interface device structure
1169  *
1170  * Returns the address of the device statistics structure.
1171  * The statistics are actually updated from the timer callback.
1172  */
1173 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1174 {
1175         struct atl1e_adapter *adapter = netdev_priv(netdev);
1176         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1177         struct net_device_stats *net_stats = &netdev->stats;
1178
1179         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1180         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1181         net_stats->multicast  = hw_stats->rx_mcast;
1182         net_stats->collisions = hw_stats->tx_1_col +
1183                                 hw_stats->tx_2_col +
1184                                 hw_stats->tx_late_col +
1185                                 hw_stats->tx_abort_col;
1186
1187         net_stats->rx_errors  = hw_stats->rx_frag +
1188                                 hw_stats->rx_fcs_err +
1189                                 hw_stats->rx_len_err +
1190                                 hw_stats->rx_sz_ov +
1191                                 hw_stats->rx_rrd_ov +
1192                                 hw_stats->rx_align_err +
1193                                 hw_stats->rx_rxf_ov;
1194
1195         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1196         net_stats->rx_length_errors = hw_stats->rx_len_err;
1197         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1198         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1199         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1200
1201         net_stats->tx_errors = hw_stats->tx_late_col +
1202                                hw_stats->tx_abort_col +
1203                                hw_stats->tx_underrun +
1204                                hw_stats->tx_trunc;
1205
1206         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1207         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1208         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1209
1210         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1211         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1212
1213         return net_stats;
1214 }
1215
1216 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1217 {
1218         u16 hw_reg_addr = 0;
1219         unsigned long *stats_item = NULL;
1220
1221         /* update rx status */
1222         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1223         stats_item  = &adapter->hw_stats.rx_ok;
1224         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1225                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1226                 stats_item++;
1227                 hw_reg_addr += 4;
1228         }
1229         /* update tx status */
1230         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1231         stats_item  = &adapter->hw_stats.tx_ok;
1232         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1233                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1234                 stats_item++;
1235                 hw_reg_addr += 4;
1236         }
1237 }
1238
1239 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1240 {
1241         u16 phy_data;
1242
1243         spin_lock(&adapter->mdio_lock);
1244         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1245         spin_unlock(&adapter->mdio_lock);
1246 }
1247
1248 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1249 {
1250         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1251         struct atl1e_tx_buffer *tx_buffer = NULL;
1252         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1253         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1254
1255         while (next_to_clean != hw_next_to_clean) {
1256                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1257                 if (tx_buffer->dma) {
1258                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1259                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1260                                         tx_buffer->length, PCI_DMA_TODEVICE);
1261                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1262                                 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1263                                         tx_buffer->length, PCI_DMA_TODEVICE);
1264                         tx_buffer->dma = 0;
1265                 }
1266
1267                 if (tx_buffer->skb) {
1268                         dev_kfree_skb_irq(tx_buffer->skb);
1269                         tx_buffer->skb = NULL;
1270                 }
1271
1272                 if (++next_to_clean == tx_ring->count)
1273                         next_to_clean = 0;
1274         }
1275
1276         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1277
1278         if (netif_queue_stopped(adapter->netdev) &&
1279                         netif_carrier_ok(adapter->netdev)) {
1280                 netif_wake_queue(adapter->netdev);
1281         }
1282
1283         return true;
1284 }
1285
1286 /**
1287  * atl1e_intr - Interrupt Handler
1288  * @irq: interrupt number
1289  * @data: pointer to a network interface device structure
1290  */
1291 static irqreturn_t atl1e_intr(int irq, void *data)
1292 {
1293         struct net_device *netdev  = data;
1294         struct atl1e_adapter *adapter = netdev_priv(netdev);
1295         struct atl1e_hw *hw = &adapter->hw;
1296         int max_ints = AT_MAX_INT_WORK;
1297         int handled = IRQ_NONE;
1298         u32 status;
1299
1300         do {
1301                 status = AT_READ_REG(hw, REG_ISR);
1302                 if ((status & IMR_NORMAL_MASK) == 0 ||
1303                                 (status & ISR_DIS_INT) != 0) {
1304                         if (max_ints != AT_MAX_INT_WORK)
1305                                 handled = IRQ_HANDLED;
1306                         break;
1307                 }
1308                 /* link event */
1309                 if (status & ISR_GPHY)
1310                         atl1e_clear_phy_int(adapter);
1311                 /* Ack ISR */
1312                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1313
1314                 handled = IRQ_HANDLED;
1315                 /* check if PCIE PHY Link down */
1316                 if (status & ISR_PHY_LINKDOWN) {
1317                         netdev_err(adapter->netdev,
1318                                    "pcie phy linkdown %x\n", status);
1319                         if (netif_running(adapter->netdev)) {
1320                                 /* reset MAC */
1321                                 atl1e_irq_reset(adapter);
1322                                 schedule_work(&adapter->reset_task);
1323                                 break;
1324                         }
1325                 }
1326
1327                 /* check if DMA read/write error */
1328                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1329                         netdev_err(adapter->netdev,
1330                                    "PCIE DMA RW error (status = 0x%x)\n",
1331                                    status);
1332                         atl1e_irq_reset(adapter);
1333                         schedule_work(&adapter->reset_task);
1334                         break;
1335                 }
1336
1337                 if (status & ISR_SMB)
1338                         atl1e_update_hw_stats(adapter);
1339
1340                 /* link event */
1341                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1342                         netdev->stats.tx_carrier_errors++;
1343                         atl1e_link_chg_event(adapter);
1344                         break;
1345                 }
1346
1347                 /* transmit event */
1348                 if (status & ISR_TX_EVENT)
1349                         atl1e_clean_tx_irq(adapter);
1350
1351                 if (status & ISR_RX_EVENT) {
1352                         /*
1353                          * disable rx interrupts, without
1354                          * the synchronize_irq bit
1355                          */
1356                         AT_WRITE_REG(hw, REG_IMR,
1357                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1358                         AT_WRITE_FLUSH(hw);
1359                         if (likely(napi_schedule_prep(
1360                                    &adapter->napi)))
1361                                 __napi_schedule(&adapter->napi);
1362                 }
1363         } while (--max_ints > 0);
1364         /* re-enable Interrupt*/
1365         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1366
1367         return handled;
1368 }
1369
1370 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1371                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1372 {
1373         u8 *packet = (u8 *)(prrs + 1);
1374         struct iphdr *iph;
1375         u16 head_len = ETH_HLEN;
1376         u16 pkt_flags;
1377         u16 err_flags;
1378
1379         skb_checksum_none_assert(skb);
1380         pkt_flags = prrs->pkt_flag;
1381         err_flags = prrs->err_flag;
1382         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1383                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1384                 if (pkt_flags & RRS_IS_IPV4) {
1385                         if (pkt_flags & RRS_IS_802_3)
1386                                 head_len += 8;
1387                         iph = (struct iphdr *) (packet + head_len);
1388                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1389                                 goto hw_xsum;
1390                 }
1391                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1392                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1393                         return;
1394                 }
1395         }
1396
1397 hw_xsum :
1398         return;
1399 }
1400
1401 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1402                                                u8 que)
1403 {
1404         struct atl1e_rx_page_desc *rx_page_desc =
1405                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1406         u8 rx_using = rx_page_desc[que].rx_using;
1407
1408         return &(rx_page_desc[que].rx_page[rx_using]);
1409 }
1410
1411 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1412                    int *work_done, int work_to_do)
1413 {
1414         struct net_device *netdev  = adapter->netdev;
1415         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1416         struct atl1e_rx_page_desc *rx_page_desc =
1417                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1418         struct sk_buff *skb = NULL;
1419         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1420         u32 packet_size, write_offset;
1421         struct atl1e_recv_ret_status *prrs;
1422
1423         write_offset = *(rx_page->write_offset_addr);
1424         if (likely(rx_page->read_offset < write_offset)) {
1425                 do {
1426                         if (*work_done >= work_to_do)
1427                                 break;
1428                         (*work_done)++;
1429                         /* get new packet's  rrs */
1430                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1431                                                  rx_page->read_offset);
1432                         /* check sequence number */
1433                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1434                                 netdev_err(netdev,
1435                                            "rx sequence number error (rx=%d) (expect=%d)\n",
1436                                            prrs->seq_num,
1437                                            rx_page_desc[que].rx_nxseq);
1438                                 rx_page_desc[que].rx_nxseq++;
1439                                 /* just for debug use */
1440                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1441                                              (((u32)prrs->seq_num) << 16) |
1442                                              rx_page_desc[que].rx_nxseq);
1443                                 goto fatal_err;
1444                         }
1445                         rx_page_desc[que].rx_nxseq++;
1446
1447                         /* error packet */
1448                         if ((prrs->pkt_flag & RRS_IS_ERR_FRAME) &&
1449                             !(netdev->features & NETIF_F_RXALL)) {
1450                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1451                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1452                                         RRS_ERR_TRUNC)) {
1453                                 /* hardware error, discard this packet*/
1454                                         netdev_err(netdev,
1455                                                    "rx packet desc error %x\n",
1456                                                    *((u32 *)prrs + 1));
1457                                         goto skip_pkt;
1458                                 }
1459                         }
1460
1461                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1462                                         RRS_PKT_SIZE_MASK);
1463                         if (likely(!(netdev->features & NETIF_F_RXFCS)))
1464                                 packet_size -= 4; /* CRC */
1465
1466                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1467                         if (skb == NULL)
1468                                 goto skip_pkt;
1469
1470                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1471                         skb_put(skb, packet_size);
1472                         skb->protocol = eth_type_trans(skb, netdev);
1473                         atl1e_rx_checksum(adapter, skb, prrs);
1474
1475                         if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1476                                 u16 vlan_tag = (prrs->vtag >> 4) |
1477                                                ((prrs->vtag & 7) << 13) |
1478                                                ((prrs->vtag & 8) << 9);
1479                                 netdev_dbg(netdev,
1480                                            "RXD VLAN TAG<RRD>=0x%04x\n",
1481                                            prrs->vtag);
1482                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1483                         }
1484                         netif_receive_skb(skb);
1485
1486 skip_pkt:
1487         /* skip current packet whether it's ok or not. */
1488                         rx_page->read_offset +=
1489                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1490                                 RRS_PKT_SIZE_MASK) +
1491                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1492                                                 0xFFFFFFE0);
1493
1494                         if (rx_page->read_offset >= rx_ring->page_size) {
1495                                 /* mark this page clean */
1496                                 u16 reg_addr;
1497                                 u8  rx_using;
1498
1499                                 rx_page->read_offset =
1500                                         *(rx_page->write_offset_addr) = 0;
1501                                 rx_using = rx_page_desc[que].rx_using;
1502                                 reg_addr =
1503                                         atl1e_rx_page_vld_regs[que][rx_using];
1504                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1505                                 rx_page_desc[que].rx_using ^= 1;
1506                                 rx_page = atl1e_get_rx_page(adapter, que);
1507                         }
1508                         write_offset = *(rx_page->write_offset_addr);
1509                 } while (rx_page->read_offset < write_offset);
1510         }
1511
1512         return;
1513
1514 fatal_err:
1515         if (!test_bit(__AT_DOWN, &adapter->flags))
1516                 schedule_work(&adapter->reset_task);
1517 }
1518
1519 /**
1520  * atl1e_clean - NAPI Rx polling callback
1521  */
1522 static int atl1e_clean(struct napi_struct *napi, int budget)
1523 {
1524         struct atl1e_adapter *adapter =
1525                         container_of(napi, struct atl1e_adapter, napi);
1526         u32 imr_data;
1527         int work_done = 0;
1528
1529         /* Keep link state information with original netdev */
1530         if (!netif_carrier_ok(adapter->netdev))
1531                 goto quit_polling;
1532
1533         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1534
1535         /* If no Tx and not enough Rx work done, exit the polling mode */
1536         if (work_done < budget) {
1537 quit_polling:
1538                 napi_complete(napi);
1539                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1540                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1541                 /* test debug */
1542                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1543                         atomic_dec(&adapter->irq_sem);
1544                         netdev_err(adapter->netdev,
1545                                    "atl1e_clean is called when AT_DOWN\n");
1546                 }
1547                 /* reenable RX intr */
1548                 /*atl1e_irq_enable(adapter); */
1549
1550         }
1551         return work_done;
1552 }
1553
1554 #ifdef CONFIG_NET_POLL_CONTROLLER
1555
1556 /*
1557  * Polling 'interrupt' - used by things like netconsole to send skbs
1558  * without having to re-enable interrupts. It's not called while
1559  * the interrupt routine is executing.
1560  */
1561 static void atl1e_netpoll(struct net_device *netdev)
1562 {
1563         struct atl1e_adapter *adapter = netdev_priv(netdev);
1564
1565         disable_irq(adapter->pdev->irq);
1566         atl1e_intr(adapter->pdev->irq, netdev);
1567         enable_irq(adapter->pdev->irq);
1568 }
1569 #endif
1570
1571 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1572 {
1573         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1574         u16 next_to_use = 0;
1575         u16 next_to_clean = 0;
1576
1577         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1578         next_to_use   = tx_ring->next_to_use;
1579
1580         return (u16)(next_to_clean > next_to_use) ?
1581                 (next_to_clean - next_to_use - 1) :
1582                 (tx_ring->count + next_to_clean - next_to_use - 1);
1583 }
1584
1585 /*
1586  * get next usable tpd
1587  * Note: should call atl1e_tdp_avail to make sure
1588  * there is enough tpd to use
1589  */
1590 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1591 {
1592         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1593         u16 next_to_use = 0;
1594
1595         next_to_use = tx_ring->next_to_use;
1596         if (++tx_ring->next_to_use == tx_ring->count)
1597                 tx_ring->next_to_use = 0;
1598
1599         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1600         return &tx_ring->desc[next_to_use];
1601 }
1602
1603 static struct atl1e_tx_buffer *
1604 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1605 {
1606         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1607
1608         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1609 }
1610
1611 /* Calculate the transmit packet descript needed*/
1612 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1613 {
1614         int i = 0;
1615         u16 tpd_req = 1;
1616         u16 fg_size = 0;
1617         u16 proto_hdr_len = 0;
1618
1619         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1620                 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1621                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1622         }
1623
1624         if (skb_is_gso(skb)) {
1625                 if (skb->protocol == htons(ETH_P_IP) ||
1626                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1627                         proto_hdr_len = skb_transport_offset(skb) +
1628                                         tcp_hdrlen(skb);
1629                         if (proto_hdr_len < skb_headlen(skb)) {
1630                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1631                                            MAX_TX_BUF_LEN - 1) >>
1632                                            MAX_TX_BUF_SHIFT);
1633                         }
1634                 }
1635
1636         }
1637         return tpd_req;
1638 }
1639
1640 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1641                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1642 {
1643         unsigned short offload_type;
1644         u8 hdr_len;
1645         u32 real_len;
1646
1647         if (skb_is_gso(skb)) {
1648                 int err;
1649
1650                 err = skb_cow_head(skb, 0);
1651                 if (err < 0)
1652                         return err;
1653
1654                 offload_type = skb_shinfo(skb)->gso_type;
1655
1656                 if (offload_type & SKB_GSO_TCPV4) {
1657                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1658                                         + ntohs(ip_hdr(skb)->tot_len));
1659
1660                         if (real_len < skb->len)
1661                                 pskb_trim(skb, real_len);
1662
1663                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1664                         if (unlikely(skb->len == hdr_len)) {
1665                                 /* only xsum need */
1666                                 netdev_warn(adapter->netdev,
1667                                             "IPV4 tso with zero data??\n");
1668                                 goto check_sum;
1669                         } else {
1670                                 ip_hdr(skb)->check = 0;
1671                                 ip_hdr(skb)->tot_len = 0;
1672                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1673                                                         ip_hdr(skb)->saddr,
1674                                                         ip_hdr(skb)->daddr,
1675                                                         0, IPPROTO_TCP, 0);
1676                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1677                                         TDP_V4_IPHL_MASK) <<
1678                                         TPD_V4_IPHL_SHIFT;
1679                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1680                                         TPD_TCPHDRLEN_MASK) <<
1681                                         TPD_TCPHDRLEN_SHIFT;
1682                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1683                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1684                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1685                         }
1686                         return 0;
1687                 }
1688         }
1689
1690 check_sum:
1691         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1692                 u8 css, cso;
1693
1694                 cso = skb_checksum_start_offset(skb);
1695                 if (unlikely(cso & 0x1)) {
1696                         netdev_err(adapter->netdev,
1697                                    "payload offset should not ant event number\n");
1698                         return -1;
1699                 } else {
1700                         css = cso + skb->csum_offset;
1701                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1702                                         TPD_PLOADOFFSET_SHIFT;
1703                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1704                                         TPD_CCSUMOFFSET_SHIFT;
1705                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1706                 }
1707         }
1708
1709         return 0;
1710 }
1711
1712 static int atl1e_tx_map(struct atl1e_adapter *adapter,
1713                         struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1714 {
1715         struct atl1e_tpd_desc *use_tpd = NULL;
1716         struct atl1e_tx_buffer *tx_buffer = NULL;
1717         u16 buf_len = skb_headlen(skb);
1718         u16 map_len = 0;
1719         u16 mapped_len = 0;
1720         u16 hdr_len = 0;
1721         u16 nr_frags;
1722         u16 f;
1723         int segment;
1724         int ring_start = adapter->tx_ring.next_to_use;
1725         int ring_end;
1726
1727         nr_frags = skb_shinfo(skb)->nr_frags;
1728         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1729         if (segment) {
1730                 /* TSO */
1731                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1732                 use_tpd = tpd;
1733
1734                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1735                 tx_buffer->length = map_len;
1736                 tx_buffer->dma = pci_map_single(adapter->pdev,
1737                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1738                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1739                         return -ENOSPC;
1740
1741                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1742                 mapped_len += map_len;
1743                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1744                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1745                         ((cpu_to_le32(tx_buffer->length) &
1746                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1747         }
1748
1749         while (mapped_len < buf_len) {
1750                 /* mapped_len == 0, means we should use the first tpd,
1751                    which is given by caller  */
1752                 if (mapped_len == 0) {
1753                         use_tpd = tpd;
1754                 } else {
1755                         use_tpd = atl1e_get_tpd(adapter);
1756                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1757                 }
1758                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1759                 tx_buffer->skb = NULL;
1760
1761                 tx_buffer->length = map_len =
1762                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1763                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1764                 tx_buffer->dma =
1765                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1766                                         map_len, PCI_DMA_TODEVICE);
1767
1768                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1769                         /* We need to unwind the mappings we've done */
1770                         ring_end = adapter->tx_ring.next_to_use;
1771                         adapter->tx_ring.next_to_use = ring_start;
1772                         while (adapter->tx_ring.next_to_use != ring_end) {
1773                                 tpd = atl1e_get_tpd(adapter);
1774                                 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1775                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1776                                                  tx_buffer->length, PCI_DMA_TODEVICE);
1777                         }
1778                         /* Reset the tx rings next pointer */
1779                         adapter->tx_ring.next_to_use = ring_start;
1780                         return -ENOSPC;
1781                 }
1782
1783                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1784                 mapped_len  += map_len;
1785                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1786                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1787                         ((cpu_to_le32(tx_buffer->length) &
1788                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1789         }
1790
1791         for (f = 0; f < nr_frags; f++) {
1792                 const struct skb_frag_struct *frag;
1793                 u16 i;
1794                 u16 seg_num;
1795
1796                 frag = &skb_shinfo(skb)->frags[f];
1797                 buf_len = skb_frag_size(frag);
1798
1799                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1800                 for (i = 0; i < seg_num; i++) {
1801                         use_tpd = atl1e_get_tpd(adapter);
1802                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1803
1804                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1805                         BUG_ON(tx_buffer->skb);
1806
1807                         tx_buffer->skb = NULL;
1808                         tx_buffer->length =
1809                                 (buf_len > MAX_TX_BUF_LEN) ?
1810                                 MAX_TX_BUF_LEN : buf_len;
1811                         buf_len -= tx_buffer->length;
1812
1813                         tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1814                                                           frag,
1815                                                           (i * MAX_TX_BUF_LEN),
1816                                                           tx_buffer->length,
1817                                                           DMA_TO_DEVICE);
1818
1819                         if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1820                                 /* We need to unwind the mappings we've done */
1821                                 ring_end = adapter->tx_ring.next_to_use;
1822                                 adapter->tx_ring.next_to_use = ring_start;
1823                                 while (adapter->tx_ring.next_to_use != ring_end) {
1824                                         tpd = atl1e_get_tpd(adapter);
1825                                         tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1826                                         dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1827                                                        tx_buffer->length, DMA_TO_DEVICE);
1828                                 }
1829
1830                                 /* Reset the ring next to use pointer */
1831                                 adapter->tx_ring.next_to_use = ring_start;
1832                                 return -ENOSPC;
1833                         }
1834
1835                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1836                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1837                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1838                                         ((cpu_to_le32(tx_buffer->length) &
1839                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1840                 }
1841         }
1842
1843         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1844                 /* note this one is a tcp header */
1845                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1846         /* The last tpd */
1847
1848         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1849         /* The last buffer info contain the skb address,
1850            so it will be free after unmap */
1851         tx_buffer->skb = skb;
1852         return 0;
1853 }
1854
1855 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1856                            struct atl1e_tpd_desc *tpd)
1857 {
1858         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1859         /* Force memory writes to complete before letting h/w
1860          * know there are new descriptors to fetch.  (Only
1861          * applicable for weak-ordered memory model archs,
1862          * such as IA-64). */
1863         wmb();
1864         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1865 }
1866
1867 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1868                                           struct net_device *netdev)
1869 {
1870         struct atl1e_adapter *adapter = netdev_priv(netdev);
1871         unsigned long flags;
1872         u16 tpd_req = 1;
1873         struct atl1e_tpd_desc *tpd;
1874
1875         if (test_bit(__AT_DOWN, &adapter->flags)) {
1876                 dev_kfree_skb_any(skb);
1877                 return NETDEV_TX_OK;
1878         }
1879
1880         if (unlikely(skb->len <= 0)) {
1881                 dev_kfree_skb_any(skb);
1882                 return NETDEV_TX_OK;
1883         }
1884         tpd_req = atl1e_cal_tdp_req(skb);
1885         if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1886                 return NETDEV_TX_LOCKED;
1887
1888         if (atl1e_tpd_avail(adapter) < tpd_req) {
1889                 /* no enough descriptor, just stop queue */
1890                 netif_stop_queue(netdev);
1891                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1892                 return NETDEV_TX_BUSY;
1893         }
1894
1895         tpd = atl1e_get_tpd(adapter);
1896
1897         if (skb_vlan_tag_present(skb)) {
1898                 u16 vlan_tag = skb_vlan_tag_get(skb);
1899                 u16 atl1e_vlan_tag;
1900
1901                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1902                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1903                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1904                                 TPD_VLAN_SHIFT;
1905         }
1906
1907         if (skb->protocol == htons(ETH_P_8021Q))
1908                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1909
1910         if (skb_network_offset(skb) != ETH_HLEN)
1911                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1912
1913         /* do TSO and check sum */
1914         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1915                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1916                 dev_kfree_skb_any(skb);
1917                 return NETDEV_TX_OK;
1918         }
1919
1920         if (atl1e_tx_map(adapter, skb, tpd)) {
1921                 dev_kfree_skb_any(skb);
1922                 goto out;
1923         }
1924
1925         atl1e_tx_queue(adapter, tpd_req, tpd);
1926
1927         netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1928 out:
1929         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1930         return NETDEV_TX_OK;
1931 }
1932
1933 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1934 {
1935         struct net_device *netdev = adapter->netdev;
1936
1937         free_irq(adapter->pdev->irq, netdev);
1938 }
1939
1940 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1941 {
1942         struct pci_dev    *pdev   = adapter->pdev;
1943         struct net_device *netdev = adapter->netdev;
1944         int err = 0;
1945
1946         err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1947                           netdev);
1948         if (err) {
1949                 netdev_dbg(adapter->netdev,
1950                            "Unable to allocate interrupt Error: %d\n", err);
1951                 return err;
1952         }
1953         netdev_dbg(netdev, "atl1e_request_irq OK\n");
1954         return err;
1955 }
1956
1957 int atl1e_up(struct atl1e_adapter *adapter)
1958 {
1959         struct net_device *netdev = adapter->netdev;
1960         int err = 0;
1961         u32 val;
1962
1963         /* hardware has been reset, we need to reload some things */
1964         err = atl1e_init_hw(&adapter->hw);
1965         if (err) {
1966                 err = -EIO;
1967                 return err;
1968         }
1969         atl1e_init_ring_ptrs(adapter);
1970         atl1e_set_multi(netdev);
1971         atl1e_restore_vlan(adapter);
1972
1973         if (atl1e_configure(adapter)) {
1974                 err = -EIO;
1975                 goto err_up;
1976         }
1977
1978         clear_bit(__AT_DOWN, &adapter->flags);
1979         napi_enable(&adapter->napi);
1980         atl1e_irq_enable(adapter);
1981         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1982         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1983                       val | MASTER_CTRL_MANUAL_INT);
1984
1985 err_up:
1986         return err;
1987 }
1988
1989 void atl1e_down(struct atl1e_adapter *adapter)
1990 {
1991         struct net_device *netdev = adapter->netdev;
1992
1993         /* signal that we're down so the interrupt handler does not
1994          * reschedule our watchdog timer */
1995         set_bit(__AT_DOWN, &adapter->flags);
1996
1997         netif_stop_queue(netdev);
1998
1999         /* reset MAC to disable all RX/TX */
2000         atl1e_reset_hw(&adapter->hw);
2001         msleep(1);
2002
2003         napi_disable(&adapter->napi);
2004         atl1e_del_timer(adapter);
2005         atl1e_irq_disable(adapter);
2006
2007         netif_carrier_off(netdev);
2008         adapter->link_speed = SPEED_0;
2009         adapter->link_duplex = -1;
2010         atl1e_clean_tx_ring(adapter);
2011         atl1e_clean_rx_ring(adapter);
2012 }
2013
2014 /**
2015  * atl1e_open - Called when a network interface is made active
2016  * @netdev: network interface device structure
2017  *
2018  * Returns 0 on success, negative value on failure
2019  *
2020  * The open entry point is called when a network interface is made
2021  * active by the system (IFF_UP).  At this point all resources needed
2022  * for transmit and receive operations are allocated, the interrupt
2023  * handler is registered with the OS, the watchdog timer is started,
2024  * and the stack is notified that the interface is ready.
2025  */
2026 static int atl1e_open(struct net_device *netdev)
2027 {
2028         struct atl1e_adapter *adapter = netdev_priv(netdev);
2029         int err;
2030
2031         /* disallow open during test */
2032         if (test_bit(__AT_TESTING, &adapter->flags))
2033                 return -EBUSY;
2034
2035         /* allocate rx/tx dma buffer & descriptors */
2036         atl1e_init_ring_resources(adapter);
2037         err = atl1e_setup_ring_resources(adapter);
2038         if (unlikely(err))
2039                 return err;
2040
2041         err = atl1e_request_irq(adapter);
2042         if (unlikely(err))
2043                 goto err_req_irq;
2044
2045         err = atl1e_up(adapter);
2046         if (unlikely(err))
2047                 goto err_up;
2048
2049         return 0;
2050
2051 err_up:
2052         atl1e_free_irq(adapter);
2053 err_req_irq:
2054         atl1e_free_ring_resources(adapter);
2055         atl1e_reset_hw(&adapter->hw);
2056
2057         return err;
2058 }
2059
2060 /**
2061  * atl1e_close - Disables a network interface
2062  * @netdev: network interface device structure
2063  *
2064  * Returns 0, this is not allowed to fail
2065  *
2066  * The close entry point is called when an interface is de-activated
2067  * by the OS.  The hardware is still under the drivers control, but
2068  * needs to be disabled.  A global MAC reset is issued to stop the
2069  * hardware, and all transmit and receive resources are freed.
2070  */
2071 static int atl1e_close(struct net_device *netdev)
2072 {
2073         struct atl1e_adapter *adapter = netdev_priv(netdev);
2074
2075         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2076         atl1e_down(adapter);
2077         atl1e_free_irq(adapter);
2078         atl1e_free_ring_resources(adapter);
2079
2080         return 0;
2081 }
2082
2083 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2084 {
2085         struct net_device *netdev = pci_get_drvdata(pdev);
2086         struct atl1e_adapter *adapter = netdev_priv(netdev);
2087         struct atl1e_hw *hw = &adapter->hw;
2088         u32 ctrl = 0;
2089         u32 mac_ctrl_data = 0;
2090         u32 wol_ctrl_data = 0;
2091         u16 mii_advertise_data = 0;
2092         u16 mii_bmsr_data = 0;
2093         u16 mii_intr_status_data = 0;
2094         u32 wufc = adapter->wol;
2095         u32 i;
2096 #ifdef CONFIG_PM
2097         int retval = 0;
2098 #endif
2099
2100         if (netif_running(netdev)) {
2101                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2102                 atl1e_down(adapter);
2103         }
2104         netif_device_detach(netdev);
2105
2106 #ifdef CONFIG_PM
2107         retval = pci_save_state(pdev);
2108         if (retval)
2109                 return retval;
2110 #endif
2111
2112         if (wufc) {
2113                 /* get link status */
2114                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2115                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2116
2117                 mii_advertise_data = ADVERTISE_10HALF;
2118
2119                 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2120                     (atl1e_write_phy_reg(hw,
2121                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2122                     (atl1e_phy_commit(hw)) != 0) {
2123                         netdev_dbg(adapter->netdev, "set phy register failed\n");
2124                         goto wol_dis;
2125                 }
2126
2127                 hw->phy_configured = false; /* re-init PHY when resume */
2128
2129                 /* turn on magic packet wol */
2130                 if (wufc & AT_WUFC_MAG)
2131                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2132
2133                 if (wufc & AT_WUFC_LNKC) {
2134                 /* if orignal link status is link, just wait for retrive link */
2135                         if (mii_bmsr_data & BMSR_LSTATUS) {
2136                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2137                                         msleep(100);
2138                                         atl1e_read_phy_reg(hw, MII_BMSR,
2139                                                         &mii_bmsr_data);
2140                                         if (mii_bmsr_data & BMSR_LSTATUS)
2141                                                 break;
2142                                 }
2143
2144                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2145                                         netdev_dbg(adapter->netdev,
2146                                                    "Link may change when suspend\n");
2147                         }
2148                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2149                         /* only link up can wake up */
2150                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2151                                 netdev_dbg(adapter->netdev,
2152                                            "read write phy register failed\n");
2153                                 goto wol_dis;
2154                         }
2155                 }
2156                 /* clear phy interrupt */
2157                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2158                 /* Config MAC Ctrl register */
2159                 mac_ctrl_data = MAC_CTRL_RX_EN;
2160                 /* set to 10/100M halt duplex */
2161                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2162                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2163                                  MAC_CTRL_PRMLEN_MASK) <<
2164                                  MAC_CTRL_PRMLEN_SHIFT);
2165
2166                 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2167
2168                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2169                 if (wufc & AT_WUFC_MAG)
2170                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2171
2172                 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2173                            mac_ctrl_data);
2174
2175                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2176                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2177                 /* pcie patch */
2178                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2179                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2180                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2181                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2182                 goto suspend_exit;
2183         }
2184 wol_dis:
2185
2186         /* WOL disabled */
2187         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2188
2189         /* pcie patch */
2190         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2191         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2192         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2193
2194         atl1e_force_ps(hw);
2195         hw->phy_configured = false; /* re-init PHY when resume */
2196
2197         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2198
2199 suspend_exit:
2200
2201         if (netif_running(netdev))
2202                 atl1e_free_irq(adapter);
2203
2204         pci_disable_device(pdev);
2205
2206         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2207
2208         return 0;
2209 }
2210
2211 #ifdef CONFIG_PM
2212 static int atl1e_resume(struct pci_dev *pdev)
2213 {
2214         struct net_device *netdev = pci_get_drvdata(pdev);
2215         struct atl1e_adapter *adapter = netdev_priv(netdev);
2216         u32 err;
2217
2218         pci_set_power_state(pdev, PCI_D0);
2219         pci_restore_state(pdev);
2220
2221         err = pci_enable_device(pdev);
2222         if (err) {
2223                 netdev_err(adapter->netdev,
2224                            "Cannot enable PCI device from suspend\n");
2225                 return err;
2226         }
2227
2228         pci_set_master(pdev);
2229
2230         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2231
2232         pci_enable_wake(pdev, PCI_D3hot, 0);
2233         pci_enable_wake(pdev, PCI_D3cold, 0);
2234
2235         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2236
2237         if (netif_running(netdev)) {
2238                 err = atl1e_request_irq(adapter);
2239                 if (err)
2240                         return err;
2241         }
2242
2243         atl1e_reset_hw(&adapter->hw);
2244
2245         if (netif_running(netdev))
2246                 atl1e_up(adapter);
2247
2248         netif_device_attach(netdev);
2249
2250         return 0;
2251 }
2252 #endif
2253
2254 static void atl1e_shutdown(struct pci_dev *pdev)
2255 {
2256         atl1e_suspend(pdev, PMSG_SUSPEND);
2257 }
2258
2259 static const struct net_device_ops atl1e_netdev_ops = {
2260         .ndo_open               = atl1e_open,
2261         .ndo_stop               = atl1e_close,
2262         .ndo_start_xmit         = atl1e_xmit_frame,
2263         .ndo_get_stats          = atl1e_get_stats,
2264         .ndo_set_rx_mode        = atl1e_set_multi,
2265         .ndo_validate_addr      = eth_validate_addr,
2266         .ndo_set_mac_address    = atl1e_set_mac_addr,
2267         .ndo_fix_features       = atl1e_fix_features,
2268         .ndo_set_features       = atl1e_set_features,
2269         .ndo_change_mtu         = atl1e_change_mtu,
2270         .ndo_do_ioctl           = atl1e_ioctl,
2271         .ndo_tx_timeout         = atl1e_tx_timeout,
2272 #ifdef CONFIG_NET_POLL_CONTROLLER
2273         .ndo_poll_controller    = atl1e_netpoll,
2274 #endif
2275
2276 };
2277
2278 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2279 {
2280         SET_NETDEV_DEV(netdev, &pdev->dev);
2281         pci_set_drvdata(pdev, netdev);
2282
2283         netdev->netdev_ops = &atl1e_netdev_ops;
2284
2285         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2286         atl1e_set_ethtool_ops(netdev);
2287
2288         netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2289                               NETIF_F_HW_VLAN_CTAG_RX;
2290         netdev->features = netdev->hw_features | NETIF_F_LLTX |
2291                            NETIF_F_HW_VLAN_CTAG_TX;
2292         /* not enabled by default */
2293         netdev->hw_features |= NETIF_F_RXALL | NETIF_F_RXFCS;
2294         return 0;
2295 }
2296
2297 /**
2298  * atl1e_probe - Device Initialization Routine
2299  * @pdev: PCI device information struct
2300  * @ent: entry in atl1e_pci_tbl
2301  *
2302  * Returns 0 on success, negative on failure
2303  *
2304  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2305  * The OS initialization, configuring of the adapter private structure,
2306  * and a hardware reset occur.
2307  */
2308 static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2309 {
2310         struct net_device *netdev;
2311         struct atl1e_adapter *adapter = NULL;
2312         static int cards_found;
2313
2314         int err = 0;
2315
2316         err = pci_enable_device(pdev);
2317         if (err) {
2318                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2319                 return err;
2320         }
2321
2322         /*
2323          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2324          * shared register for the high 32 bits, so only a single, aligned,
2325          * 4 GB physical address range can be used at a time.
2326          *
2327          * Supporting 64-bit DMA on this hardware is more trouble than it's
2328          * worth.  It is far easier to limit to 32-bit DMA than update
2329          * various kernel subsystems to support the mechanics required by a
2330          * fixed-high-32-bit system.
2331          */
2332         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2333             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2334                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2335                 goto err_dma;
2336         }
2337
2338         err = pci_request_regions(pdev, atl1e_driver_name);
2339         if (err) {
2340                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2341                 goto err_pci_reg;
2342         }
2343
2344         pci_set_master(pdev);
2345
2346         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2347         if (netdev == NULL) {
2348                 err = -ENOMEM;
2349                 goto err_alloc_etherdev;
2350         }
2351
2352         err = atl1e_init_netdev(netdev, pdev);
2353         if (err) {
2354                 netdev_err(netdev, "init netdevice failed\n");
2355                 goto err_init_netdev;
2356         }
2357         adapter = netdev_priv(netdev);
2358         adapter->bd_number = cards_found;
2359         adapter->netdev = netdev;
2360         adapter->pdev = pdev;
2361         adapter->hw.adapter = adapter;
2362         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2363         if (!adapter->hw.hw_addr) {
2364                 err = -EIO;
2365                 netdev_err(netdev, "cannot map device registers\n");
2366                 goto err_ioremap;
2367         }
2368
2369         /* init mii data */
2370         adapter->mii.dev = netdev;
2371         adapter->mii.mdio_read  = atl1e_mdio_read;
2372         adapter->mii.mdio_write = atl1e_mdio_write;
2373         adapter->mii.phy_id_mask = 0x1f;
2374         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2375
2376         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2377
2378         setup_timer(&adapter->phy_config_timer, atl1e_phy_config,
2379                     (unsigned long)adapter);
2380
2381         /* get user settings */
2382         atl1e_check_options(adapter);
2383         /*
2384          * Mark all PCI regions associated with PCI device
2385          * pdev as being reserved by owner atl1e_driver_name
2386          * Enables bus-mastering on the device and calls
2387          * pcibios_set_master to do the needed arch specific settings
2388          */
2389         atl1e_setup_pcicmd(pdev);
2390         /* setup the private structure */
2391         err = atl1e_sw_init(adapter);
2392         if (err) {
2393                 netdev_err(netdev, "net device private data init failed\n");
2394                 goto err_sw_init;
2395         }
2396
2397         /* Init GPHY as early as possible due to power saving issue  */
2398         atl1e_phy_init(&adapter->hw);
2399         /* reset the controller to
2400          * put the device in a known good starting state */
2401         err = atl1e_reset_hw(&adapter->hw);
2402         if (err) {
2403                 err = -EIO;
2404                 goto err_reset;
2405         }
2406
2407         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2408                 err = -EIO;
2409                 netdev_err(netdev, "get mac address failed\n");
2410                 goto err_eeprom;
2411         }
2412
2413         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2414         netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2415
2416         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2417         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2418         netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2419         err = register_netdev(netdev);
2420         if (err) {
2421                 netdev_err(netdev, "register netdevice failed\n");
2422                 goto err_register;
2423         }
2424
2425         /* assume we have no link for now */
2426         netif_stop_queue(netdev);
2427         netif_carrier_off(netdev);
2428
2429         cards_found++;
2430
2431         return 0;
2432
2433 err_reset:
2434 err_register:
2435 err_sw_init:
2436 err_eeprom:
2437         pci_iounmap(pdev, adapter->hw.hw_addr);
2438 err_init_netdev:
2439 err_ioremap:
2440         free_netdev(netdev);
2441 err_alloc_etherdev:
2442         pci_release_regions(pdev);
2443 err_pci_reg:
2444 err_dma:
2445         pci_disable_device(pdev);
2446         return err;
2447 }
2448
2449 /**
2450  * atl1e_remove - Device Removal Routine
2451  * @pdev: PCI device information struct
2452  *
2453  * atl1e_remove is called by the PCI subsystem to alert the driver
2454  * that it should release a PCI device.  The could be caused by a
2455  * Hot-Plug event, or because the driver is going to be removed from
2456  * memory.
2457  */
2458 static void atl1e_remove(struct pci_dev *pdev)
2459 {
2460         struct net_device *netdev = pci_get_drvdata(pdev);
2461         struct atl1e_adapter *adapter = netdev_priv(netdev);
2462
2463         /*
2464          * flush_scheduled work may reschedule our watchdog task, so
2465          * explicitly disable watchdog tasks from being rescheduled
2466          */
2467         set_bit(__AT_DOWN, &adapter->flags);
2468
2469         atl1e_del_timer(adapter);
2470         atl1e_cancel_work(adapter);
2471
2472         unregister_netdev(netdev);
2473         atl1e_free_ring_resources(adapter);
2474         atl1e_force_ps(&adapter->hw);
2475         pci_iounmap(pdev, adapter->hw.hw_addr);
2476         pci_release_regions(pdev);
2477         free_netdev(netdev);
2478         pci_disable_device(pdev);
2479 }
2480
2481 /**
2482  * atl1e_io_error_detected - called when PCI error is detected
2483  * @pdev: Pointer to PCI device
2484  * @state: The current pci connection state
2485  *
2486  * This function is called after a PCI bus error affecting
2487  * this device has been detected.
2488  */
2489 static pci_ers_result_t
2490 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2491 {
2492         struct net_device *netdev = pci_get_drvdata(pdev);
2493         struct atl1e_adapter *adapter = netdev_priv(netdev);
2494
2495         netif_device_detach(netdev);
2496
2497         if (state == pci_channel_io_perm_failure)
2498                 return PCI_ERS_RESULT_DISCONNECT;
2499
2500         if (netif_running(netdev))
2501                 atl1e_down(adapter);
2502
2503         pci_disable_device(pdev);
2504
2505         /* Request a slot slot reset. */
2506         return PCI_ERS_RESULT_NEED_RESET;
2507 }
2508
2509 /**
2510  * atl1e_io_slot_reset - called after the pci bus has been reset.
2511  * @pdev: Pointer to PCI device
2512  *
2513  * Restart the card from scratch, as if from a cold-boot. Implementation
2514  * resembles the first-half of the e1000_resume routine.
2515  */
2516 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2517 {
2518         struct net_device *netdev = pci_get_drvdata(pdev);
2519         struct atl1e_adapter *adapter = netdev_priv(netdev);
2520
2521         if (pci_enable_device(pdev)) {
2522                 netdev_err(adapter->netdev,
2523                            "Cannot re-enable PCI device after reset\n");
2524                 return PCI_ERS_RESULT_DISCONNECT;
2525         }
2526         pci_set_master(pdev);
2527
2528         pci_enable_wake(pdev, PCI_D3hot, 0);
2529         pci_enable_wake(pdev, PCI_D3cold, 0);
2530
2531         atl1e_reset_hw(&adapter->hw);
2532
2533         return PCI_ERS_RESULT_RECOVERED;
2534 }
2535
2536 /**
2537  * atl1e_io_resume - called when traffic can start flowing again.
2538  * @pdev: Pointer to PCI device
2539  *
2540  * This callback is called when the error recovery driver tells us that
2541  * its OK to resume normal operation. Implementation resembles the
2542  * second-half of the atl1e_resume routine.
2543  */
2544 static void atl1e_io_resume(struct pci_dev *pdev)
2545 {
2546         struct net_device *netdev = pci_get_drvdata(pdev);
2547         struct atl1e_adapter *adapter = netdev_priv(netdev);
2548
2549         if (netif_running(netdev)) {
2550                 if (atl1e_up(adapter)) {
2551                         netdev_err(adapter->netdev,
2552                                    "can't bring device back up after reset\n");
2553                         return;
2554                 }
2555         }
2556
2557         netif_device_attach(netdev);
2558 }
2559
2560 static const struct pci_error_handlers atl1e_err_handler = {
2561         .error_detected = atl1e_io_error_detected,
2562         .slot_reset = atl1e_io_slot_reset,
2563         .resume = atl1e_io_resume,
2564 };
2565
2566 static struct pci_driver atl1e_driver = {
2567         .name     = atl1e_driver_name,
2568         .id_table = atl1e_pci_tbl,
2569         .probe    = atl1e_probe,
2570         .remove   = atl1e_remove,
2571         /* Power Management Hooks */
2572 #ifdef CONFIG_PM
2573         .suspend  = atl1e_suspend,
2574         .resume   = atl1e_resume,
2575 #endif
2576         .shutdown = atl1e_shutdown,
2577         .err_handler = &atl1e_err_handler
2578 };
2579
2580 module_pci_driver(atl1e_driver);