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, <[email protected]>, Jie Yang <[email protected]>");
  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(struct timer_list *t)
 134 {
 135         struct atl1e_adapter *adapter = from_timer(adapter, t,
 136                                                    phy_config_timer);
 137         struct atl1e_hw *hw = &adapter->hw;
 138         unsigned long flags;
 139
 140         spin_lock_irqsave(&adapter->mdio_lock, flags);
 141         atl1e_restart_autoneg(hw);
 142         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 143 }
 144
 145 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 146 {
 147
 148         WARN_ON(in_interrupt());
 149         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 150                 msleep(1);
 151         atl1e_down(adapter);
 152         atl1e_up(adapter);
 153         clear_bit(__AT_RESETTING, &adapter->flags);
 154 }
 155
 156 static void atl1e_reset_task(struct work_struct *work)
 157 {
 158         struct atl1e_adapter *adapter;
 159         adapter = container_of(work, struct atl1e_adapter, reset_task);
 160
 161         atl1e_reinit_locked(adapter);
 162 }
 163
 164 static int atl1e_check_link(struct atl1e_adapter *adapter)
 165 {
 166         struct atl1e_hw *hw = &adapter->hw;
 167         struct net_device *netdev = adapter->netdev;
 168         int err = 0;
 169         u16 speed, duplex, phy_data;
 170
 171         /* MII_BMSR must read twice */
 172         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 173         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 174         if ((phy_data & BMSR_LSTATUS) == 0) {
 175                 /* link down */
 176                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 177                         u32 value;
 178                         /* disable rx */
 179                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 180                         value &= ~MAC_CTRL_RX_EN;
 181                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 182                         adapter->link_speed = SPEED_0;
 183                         netif_carrier_off(netdev);
 184                         netif_stop_queue(netdev);
 185                 }
 186         } else {
 187                 /* Link Up */
 188                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 189                 if (unlikely(err))
 190                         return err;
 191
 192                 /* link result is our setting */
 193                 if (adapter->link_speed != speed ||
 194                     adapter->link_duplex != duplex) {
 195                         adapter->link_speed  = speed;
 196                         adapter->link_duplex = duplex;
 197                         atl1e_setup_mac_ctrl(adapter);
 198                         netdev_info(netdev,
 199                                     "NIC Link is Up <%d Mbps %s Duplex>\n",
 200                                     adapter->link_speed,
 201                                     adapter->link_duplex == FULL_DUPLEX ?
 202                                     "Full" : "Half");
 203                 }
 204
 205                 if (!netif_carrier_ok(netdev)) {
 206                         /* Link down -> Up */
 207                         netif_carrier_on(netdev);
 208                         netif_wake_queue(netdev);
 209                 }
 210         }
 211         return 0;
 212 }
 213
 214 /**
 215  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 216  * @netdev: network interface device structure
 217  */
 218 static void atl1e_link_chg_task(struct work_struct *work)
 219 {
 220         struct atl1e_adapter *adapter;
 221         unsigned long flags;
 222
 223         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 224         spin_lock_irqsave(&adapter->mdio_lock, flags);
 225         atl1e_check_link(adapter);
 226         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 227 }
 228
 229 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 230 {
 231         struct net_device *netdev = adapter->netdev;
 232         u16 phy_data = 0;
 233         u16 link_up = 0;
 234
 235         spin_lock(&adapter->mdio_lock);
 236         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 237         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 238         spin_unlock(&adapter->mdio_lock);
 239         link_up = phy_data & BMSR_LSTATUS;
 240         /* notify upper layer link down ASAP */
 241         if (!link_up) {
 242                 if (netif_carrier_ok(netdev)) {
 243                         /* old link state: Up */
 244                         netdev_info(netdev, "NIC Link is Down\n");
 245                         adapter->link_speed = SPEED_0;
 246                         netif_stop_queue(netdev);
 247                 }
 248         }
 249         schedule_work(&adapter->link_chg_task);
 250 }
 251
 252 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 253 {
 254         del_timer_sync(&adapter->phy_config_timer);
 255 }
 256
 257 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 258 {
 259         cancel_work_sync(&adapter->reset_task);
 260         cancel_work_sync(&adapter->link_chg_task);
 261 }
 262
 263 /**
 264  * atl1e_tx_timeout - Respond to a Tx Hang
 265  * @netdev: network interface device structure
 266  */
 267 static void atl1e_tx_timeout(struct net_device *netdev)
 268 {
 269         struct atl1e_adapter *adapter = netdev_priv(netdev);
 270
 271         /* Do the reset outside of interrupt context */
 272         schedule_work(&adapter->reset_task);
 273 }
 274
 275 /**
 276  * atl1e_set_multi - Multicast and Promiscuous mode set
 277  * @netdev: network interface device structure
 278  *
 279  * The set_multi entry point is called whenever the multicast address
 280  * list or the network interface flags are updated.  This routine is
 281  * responsible for configuring the hardware for proper multicast,
 282  * promiscuous mode, and all-multi behavior.
 283  */
 284 static void atl1e_set_multi(struct net_device *netdev)
 285 {
 286         struct atl1e_adapter *adapter = netdev_priv(netdev);
 287         struct atl1e_hw *hw = &adapter->hw;
 288         struct netdev_hw_addr *ha;
 289         u32 mac_ctrl_data = 0;
 290         u32 hash_value;
 291
 292         /* Check for Promiscuous and All Multicast modes */
 293         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 294
 295         if (netdev->flags & IFF_PROMISC) {
 296                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 297         } else if (netdev->flags & IFF_ALLMULTI) {
 298                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 299                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 300         } else {
 301                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 302         }
 303
 304         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 305
 306         /* clear the old settings from the multicast hash table */
 307         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 308         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 309
 310         /* comoute mc addresses' hash value ,and put it into hash table */
 311         netdev_for_each_mc_addr(ha, netdev) {
 312                 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 313                 atl1e_hash_set(hw, hash_value);
 314         }
 315 }
 316
 317 static void __atl1e_rx_mode(netdev_features_t features, u32 *mac_ctrl_data)
 318 {
 319
 320         if (features & NETIF_F_RXALL) {
 321                 /* enable RX of ALL frames */
 322                 *mac_ctrl_data |= MAC_CTRL_DBG;
 323         } else {
 324                 /* disable RX of ALL frames */
 325                 *mac_ctrl_data &= ~MAC_CTRL_DBG;
 326         }
 327 }
 328
 329 static void atl1e_rx_mode(struct net_device *netdev,
 330         netdev_features_t features)
 331 {
 332         struct atl1e_adapter *adapter = netdev_priv(netdev);
 333         u32 mac_ctrl_data = 0;
 334
 335         netdev_dbg(adapter->netdev, "%s\n", __func__);
 336
 337         atl1e_irq_disable(adapter);
 338         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 339         __atl1e_rx_mode(features, &mac_ctrl_data);
 340         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 341         atl1e_irq_enable(adapter);
 342 }
 343
 344
 345 static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 346 {
 347         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 348                 /* enable VLAN tag insert/strip */
 349                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 350         } else {
 351                 /* disable VLAN tag insert/strip */
 352                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 353         }
 354 }
 355
 356 static void atl1e_vlan_mode(struct net_device *netdev,
 357         netdev_features_t features)
 358 {
 359         struct atl1e_adapter *adapter = netdev_priv(netdev);
 360         u32 mac_ctrl_data = 0;
 361
 362         netdev_dbg(adapter->netdev, "%s\n", __func__);
 363
 364         atl1e_irq_disable(adapter);
 365         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 366         __atl1e_vlan_mode(features, &mac_ctrl_data);
 367         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 368         atl1e_irq_enable(adapter);
 369 }
 370
 371 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 372 {
 373         netdev_dbg(adapter->netdev, "%s\n", __func__);
 374         atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
 375 }
 376
 377 /**
 378  * atl1e_set_mac - Change the Ethernet Address of the NIC
 379  * @netdev: network interface device structure
 380  * @p: pointer to an address structure
 381  *
 382  * Returns 0 on success, negative on failure
 383  */
 384 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 385 {
 386         struct atl1e_adapter *adapter = netdev_priv(netdev);
 387         struct sockaddr *addr = p;
 388
 389         if (!is_valid_ether_addr(addr->sa_data))
 390                 return -EADDRNOTAVAIL;
 391
 392         if (netif_running(netdev))
 393                 return -EBUSY;
 394
 395         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 396         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 397
 398         atl1e_hw_set_mac_addr(&adapter->hw);
 399
 400         return 0;
 401 }
 402
 403 static netdev_features_t atl1e_fix_features(struct net_device *netdev,
 404         netdev_features_t features)
 405 {
 406         /*
 407          * Since there is no support for separate rx/tx vlan accel
 408          * enable/disable make sure tx flag is always in same state as rx.
 409          */
 410         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 411                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 412         else
 413                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 414
 415         return features;
 416 }
 417
 418 static int atl1e_set_features(struct net_device *netdev,
 419         netdev_features_t features)
 420 {
 421         netdev_features_t changed = netdev->features ^ features;
 422
 423         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 424                 atl1e_vlan_mode(netdev, features);
 425
 426         if (changed & NETIF_F_RXALL)
 427                 atl1e_rx_mode(netdev, features);
 428
 429
 430         return 0;
 431 }
 432
 433 /**
 434  * atl1e_change_mtu - Change the Maximum Transfer Unit
 435  * @netdev: network interface device structure
 436  * @new_mtu: new value for maximum frame size
 437  *
 438  * Returns 0 on success, negative on failure
 439  */
 440 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 441 {
 442         struct atl1e_adapter *adapter = netdev_priv(netdev);
 443         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 444
 445         /* set MTU */
 446         if (netif_running(netdev)) {
 447                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 448                         msleep(1);
 449                 netdev->mtu = new_mtu;
 450                 adapter->hw.max_frame_size = new_mtu;
 451                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 452                 atl1e_down(adapter);
 453                 atl1e_up(adapter);
 454                 clear_bit(__AT_RESETTING, &adapter->flags);
 455         }
 456         return 0;
 457 }
 458
 459 /*
 460  *  caller should hold mdio_lock
 461  */
 462 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 463 {
 464         struct atl1e_adapter *adapter = netdev_priv(netdev);
 465         u16 result;
 466
 467         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 468         return result;
 469 }
 470
 471 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 472                              int reg_num, int val)
 473 {
 474         struct atl1e_adapter *adapter = netdev_priv(netdev);
 475
 476         atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 477 }
 478
 479 static int atl1e_mii_ioctl(struct net_device *netdev,
 480                            struct ifreq *ifr, int cmd)
 481 {
 482         struct atl1e_adapter *adapter = netdev_priv(netdev);
 483         struct mii_ioctl_data *data = if_mii(ifr);
 484         unsigned long flags;
 485         int retval = 0;
 486
 487         if (!netif_running(netdev))
 488                 return -EINVAL;
 489
 490         spin_lock_irqsave(&adapter->mdio_lock, flags);
 491         switch (cmd) {
 492         case SIOCGMIIPHY:
 493                 data->phy_id = 0;
 494                 break;
 495
 496         case SIOCGMIIREG:
 497                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 498                                     &data->val_out)) {
 499                         retval = -EIO;
 500                         goto out;
 501                 }
 502                 break;
 503
 504         case SIOCSMIIREG:
 505                 if (data->reg_num & ~(0x1F)) {
 506                         retval = -EFAULT;
 507                         goto out;
 508                 }
 509
 510                 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 511                            data->reg_num, data->val_in);
 512                 if (atl1e_write_phy_reg(&adapter->hw,
 513                                      data->reg_num, data->val_in)) {
 514                         retval = -EIO;
 515                         goto out;
 516                 }
 517                 break;
 518
 519         default:
 520                 retval = -EOPNOTSUPP;
 521                 break;
 522         }
 523 out:
 524         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 525         return retval;
 526
 527 }
 528
 529 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 530 {
 531         switch (cmd) {
 532         case SIOCGMIIPHY:
 533         case SIOCGMIIREG:
 534         case SIOCSMIIREG:
 535                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 536         default:
 537                 return -EOPNOTSUPP;
 538         }
 539 }
 540
 541 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 542 {
 543         u16 cmd;
 544
 545         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 546         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 547         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 548         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 549
 550         /*
 551          * some motherboards BIOS(PXE/EFI) driver may set PME
 552          * while they transfer control to OS (Windows/Linux)
 553          * so we should clear this bit before NIC work normally
 554          */
 555         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 556         msleep(1);
 557 }
 558
 559 /**
 560  * atl1e_alloc_queues - Allocate memory for all rings
 561  * @adapter: board private structure to initialize
 562  *
 563  */
 564 static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
 565 {
 566         return 0;
 567 }
 568
 569 /**
 570  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 571  * @adapter: board private structure to initialize
 572  *
 573  * atl1e_sw_init initializes the Adapter private data structure.
 574  * Fields are initialized based on PCI device information and
 575  * OS network device settings (MTU size).
 576  */
 577 static int atl1e_sw_init(struct atl1e_adapter *adapter)
 578 {
 579         struct atl1e_hw *hw   = &adapter->hw;
 580         struct pci_dev  *pdev = adapter->pdev;
 581         u32 phy_status_data = 0;
 582
 583         adapter->wol = 0;
 584         adapter->link_speed = SPEED_0;   /* hardware init */
 585         adapter->link_duplex = FULL_DUPLEX;
 586         adapter->num_rx_queues = 1;
 587
 588         /* PCI config space info */
 589         hw->vendor_id = pdev->vendor;
 590         hw->device_id = pdev->device;
 591         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 592         hw->subsystem_id = pdev->subsystem_device;
 593         hw->revision_id  = pdev->revision;
 594
 595         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 596
 597         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 598         /* nic type */
 599         if (hw->revision_id >= 0xF0) {
 600                 hw->nic_type = athr_l2e_revB;
 601         } else {
 602                 if (phy_status_data & PHY_STATUS_100M)
 603                         hw->nic_type = athr_l1e;
 604                 else
 605                         hw->nic_type = athr_l2e_revA;
 606         }
 607
 608         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 609
 610         if (phy_status_data & PHY_STATUS_EMI_CA)
 611                 hw->emi_ca = true;
 612         else
 613                 hw->emi_ca = false;
 614
 615         hw->phy_configured = false;
 616         hw->preamble_len = 7;
 617         hw->max_frame_size = adapter->netdev->mtu;
 618         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 619                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 620
 621         hw->rrs_type = atl1e_rrs_disable;
 622         hw->indirect_tab = 0;
 623         hw->base_cpu = 0;
 624
 625         /* need confirm */
 626
 627         hw->ict = 50000;                 /* 100ms */
 628         hw->smb_timer = 200000;          /* 200ms  */
 629         hw->tpd_burst = 5;
 630         hw->rrd_thresh = 1;
 631         hw->tpd_thresh = adapter->tx_ring.count / 2;
 632         hw->rx_count_down = 4;  /* 2us resolution */
 633         hw->tx_count_down = hw->imt * 4 / 3;
 634         hw->dmar_block = atl1e_dma_req_1024;
 635         hw->dmaw_block = atl1e_dma_req_1024;
 636         hw->dmar_dly_cnt = 15;
 637         hw->dmaw_dly_cnt = 4;
 638
 639         if (atl1e_alloc_queues(adapter)) {
 640                 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 641                 return -ENOMEM;
 642         }
 643
 644         atomic_set(&adapter->irq_sem, 1);
 645         spin_lock_init(&adapter->mdio_lock);
 646
 647         set_bit(__AT_DOWN, &adapter->flags);
 648
 649         return 0;
 650 }
 651
 652 /**
 653  * atl1e_clean_tx_ring - Free Tx-skb
 654  * @adapter: board private structure
 655  */
 656 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 657 {
 658         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 659         struct atl1e_tx_buffer *tx_buffer = NULL;
 660         struct pci_dev *pdev = adapter->pdev;
 661         u16 index, ring_count;
 662
 663         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 664                 return;
 665
 666         ring_count = tx_ring->count;
 667         /* first unmmap dma */
 668         for (index = 0; index < ring_count; index++) {
 669                 tx_buffer = &tx_ring->tx_buffer[index];
 670                 if (tx_buffer->dma) {
 671                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 672                                 pci_unmap_single(pdev, tx_buffer->dma,
 673                                         tx_buffer->length, PCI_DMA_TODEVICE);
 674                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 675                                 pci_unmap_page(pdev, tx_buffer->dma,
 676                                         tx_buffer->length, PCI_DMA_TODEVICE);
 677                         tx_buffer->dma = 0;
 678                 }
 679         }
 680         /* second free skb */
 681         for (index = 0; index < ring_count; index++) {
 682                 tx_buffer = &tx_ring->tx_buffer[index];
 683                 if (tx_buffer->skb) {
 684                         dev_kfree_skb_any(tx_buffer->skb);
 685                         tx_buffer->skb = NULL;
 686                 }
 687         }
 688         /* Zero out Tx-buffers */
 689         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 690                                 ring_count);
 691         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 692                                 ring_count);
 693 }
 694
 695 /**
 696  * atl1e_clean_rx_ring - Free rx-reservation skbs
 697  * @adapter: board private structure
 698  */
 699 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 700 {
 701         struct atl1e_rx_ring *rx_ring =
 702                 &adapter->rx_ring;
 703         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 704         u16 i, j;
 705
 706
 707         if (adapter->ring_vir_addr == NULL)
 708                 return;
 709         /* Zero out the descriptor ring */
 710         for (i = 0; i < adapter->num_rx_queues; i++) {
 711                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 712                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 713                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 714                                                 rx_ring->real_page_size);
 715                         }
 716                 }
 717         }
 718 }
 719
 720 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 721 {
 722         *ring_size = ((u32)(adapter->tx_ring.count *
 723                      sizeof(struct atl1e_tpd_desc) + 7
 724                         /* tx ring, qword align */
 725                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 726                         adapter->num_rx_queues + 31
 727                         /* rx ring,  32 bytes align */
 728                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 729                         sizeof(u32) + 3));
 730                         /* tx, rx cmd, dword align   */
 731 }
 732
 733 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 734 {
 735         struct atl1e_rx_ring *rx_ring = NULL;
 736
 737         rx_ring = &adapter->rx_ring;
 738
 739         rx_ring->real_page_size = adapter->rx_ring.page_size
 740                                  + adapter->hw.max_frame_size
 741                                  + ETH_HLEN + VLAN_HLEN
 742                                  + ETH_FCS_LEN;
 743         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 744         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 745
 746         adapter->ring_vir_addr = NULL;
 747         adapter->rx_ring.desc = NULL;
 748         rwlock_init(&adapter->tx_ring.tx_lock);
 749 }
 750
 751 /*
 752  * Read / Write Ptr Initialize:
 753  */
 754 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 755 {
 756         struct atl1e_tx_ring *tx_ring = NULL;
 757         struct atl1e_rx_ring *rx_ring = NULL;
 758         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 759         int i, j;
 760
 761         tx_ring = &adapter->tx_ring;
 762         rx_ring = &adapter->rx_ring;
 763         rx_page_desc = rx_ring->rx_page_desc;
 764
 765         tx_ring->next_to_use = 0;
 766         atomic_set(&tx_ring->next_to_clean, 0);
 767
 768         for (i = 0; i < adapter->num_rx_queues; i++) {
 769                 rx_page_desc[i].rx_using  = 0;
 770                 rx_page_desc[i].rx_nxseq = 0;
 771                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 772                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 773                         rx_page_desc[i].rx_page[j].read_offset = 0;
 774                 }
 775         }
 776 }
 777
 778 /**
 779  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 780  * @adapter: board private structure
 781  *
 782  * Free all transmit software resources
 783  */
 784 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 785 {
 786         struct pci_dev *pdev = adapter->pdev;
 787
 788         atl1e_clean_tx_ring(adapter);
 789         atl1e_clean_rx_ring(adapter);
 790
 791         if (adapter->ring_vir_addr) {
 792                 pci_free_consistent(pdev, adapter->ring_size,
 793                                 adapter->ring_vir_addr, adapter->ring_dma);
 794                 adapter->ring_vir_addr = NULL;
 795         }
 796
 797         if (adapter->tx_ring.tx_buffer) {
 798                 kfree(adapter->tx_ring.tx_buffer);
 799                 adapter->tx_ring.tx_buffer = NULL;
 800         }
 801 }
 802
 803 /**
 804  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 805  * @adapter: board private structure
 806  *
 807  * Return 0 on success, negative on failure
 808  */
 809 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 810 {
 811         struct pci_dev *pdev = adapter->pdev;
 812         struct atl1e_tx_ring *tx_ring;
 813         struct atl1e_rx_ring *rx_ring;
 814         struct atl1e_rx_page_desc  *rx_page_desc;
 815         int size, i, j;
 816         u32 offset = 0;
 817         int err = 0;
 818
 819         if (adapter->ring_vir_addr != NULL)
 820                 return 0; /* alloced already */
 821
 822         tx_ring = &adapter->tx_ring;
 823         rx_ring = &adapter->rx_ring;
 824
 825         /* real ring DMA buffer */
 826
 827         size = adapter->ring_size;
 828         adapter->ring_vir_addr = pci_zalloc_consistent(pdev, adapter->ring_size,
 829                                                        &adapter->ring_dma);
 830         if (adapter->ring_vir_addr == NULL) {
 831                 netdev_err(adapter->netdev,
 832                            "pci_alloc_consistent failed, size = D%d\n", size);
 833                 return -ENOMEM;
 834         }
 835
 836         rx_page_desc = rx_ring->rx_page_desc;
 837
 838         /* Init TPD Ring */
 839         tx_ring->dma = roundup(adapter->ring_dma, 8);
 840         offset = tx_ring->dma - adapter->ring_dma;
 841         tx_ring->desc = adapter->ring_vir_addr + offset;
 842         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 843         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 844         if (tx_ring->tx_buffer == NULL) {
 845                 err = -ENOMEM;
 846                 goto failed;
 847         }
 848
 849         /* Init RXF-Pages */
 850         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 851         offset = roundup(offset, 32);
 852
 853         for (i = 0; i < adapter->num_rx_queues; i++) {
 854                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 855                         rx_page_desc[i].rx_page[j].dma =
 856                                 adapter->ring_dma + offset;
 857                         rx_page_desc[i].rx_page[j].addr =
 858                                 adapter->ring_vir_addr + offset;
 859                         offset += rx_ring->real_page_size;
 860                 }
 861         }
 862
 863         /* Init CMB dma address */
 864         tx_ring->cmb_dma = adapter->ring_dma + offset;
 865         tx_ring->cmb = adapter->ring_vir_addr + offset;
 866         offset += sizeof(u32);
 867
 868         for (i = 0; i < adapter->num_rx_queues; i++) {
 869                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 870                         rx_page_desc[i].rx_page[j].write_offset_dma =
 871                                 adapter->ring_dma + offset;
 872                         rx_page_desc[i].rx_page[j].write_offset_addr =
 873                                 adapter->ring_vir_addr + offset;
 874                         offset += sizeof(u32);
 875                 }
 876         }
 877
 878         if (unlikely(offset > adapter->ring_size)) {
 879                 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 880                            offset, adapter->ring_size);
 881                 err = -1;
 882                 goto failed;
 883         }
 884
 885         return 0;
 886 failed:
 887         if (adapter->ring_vir_addr != NULL) {
 888                 pci_free_consistent(pdev, adapter->ring_size,
 889                                 adapter->ring_vir_addr, adapter->ring_dma);
 890                 adapter->ring_vir_addr = NULL;
 891         }
 892         return err;
 893 }
 894
 895 static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
 896 {
 897
 898         struct atl1e_hw *hw = &adapter->hw;
 899         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
 900         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 901         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 902         int i, j;
 903
 904         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 905                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 906         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 907                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 908         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 909         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 910                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 911
 912         rx_page_desc = rx_ring->rx_page_desc;
 913         /* RXF Page Physical address / Page Length */
 914         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 915                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 916                                  (u32)((adapter->ring_dma &
 917                                  AT_DMA_HI_ADDR_MASK) >> 32));
 918                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 919                         u32 page_phy_addr;
 920                         u32 offset_phy_addr;
 921
 922                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 923                         offset_phy_addr =
 924                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 925
 926                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 927                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 928                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 929                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 930                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 931                 }
 932         }
 933         /* Page Length */
 934         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 935         /* Load all of base address above */
 936         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 937 }
 938
 939 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 940 {
 941         struct atl1e_hw *hw = &adapter->hw;
 942         u32 dev_ctrl_data = 0;
 943         u32 max_pay_load = 0;
 944         u32 jumbo_thresh = 0;
 945         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 946
 947         /* configure TXQ param */
 948         if (hw->nic_type != athr_l2e_revB) {
 949                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 950                 if (hw->max_frame_size <= 1500) {
 951                         jumbo_thresh = hw->max_frame_size + extra_size;
 952                 } else if (hw->max_frame_size < 6*1024) {
 953                         jumbo_thresh =
 954                                 (hw->max_frame_size + extra_size) * 2 / 3;
 955                 } else {
 956                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 957                 }
 958                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 959         }
 960
 961         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 962
 963         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 964                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 965
 966         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 967
 968         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 969                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 970         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 971
 972         if (hw->nic_type != athr_l2e_revB)
 973                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 974                               atl1e_pay_load_size[hw->dmar_block]);
 975         /* enable TXQ */
 976         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 977                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 978                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 979                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 980 }
 981
 982 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 983 {
 984         struct atl1e_hw *hw = &adapter->hw;
 985         u32 rxf_len  = 0;
 986         u32 rxf_low  = 0;
 987         u32 rxf_high = 0;
 988         u32 rxf_thresh_data = 0;
 989         u32 rxq_ctrl_data = 0;
 990
 991         if (hw->nic_type != athr_l2e_revB) {
 992                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 993                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 994                               RXQ_JMBOSZ_TH_SHIFT |
 995                               (1 & RXQ_JMBO_LKAH_MASK) <<
 996                               RXQ_JMBO_LKAH_SHIFT));
 997
 998                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 999                 rxf_high = rxf_len * 4 / 5;
1000                 rxf_low  = rxf_len / 5;
1001                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
1002                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1003                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
1004                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1005
1006                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
1007         }
1008
1009         /* RRS */
1010         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1011         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1012
1013         if (hw->rrs_type & atl1e_rrs_ipv4)
1014                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1015
1016         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1017                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1018
1019         if (hw->rrs_type & atl1e_rrs_ipv6)
1020                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1021
1022         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1023                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1024
1025         if (hw->rrs_type != atl1e_rrs_disable)
1026                 rxq_ctrl_data |=
1027                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1028
1029         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1030                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1031
1032         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1033 }
1034
1035 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1036 {
1037         struct atl1e_hw *hw = &adapter->hw;
1038         u32 dma_ctrl_data = 0;
1039
1040         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1041         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1042                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1043         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1044                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1045         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1046         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1047                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1048         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1049                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1050
1051         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1052 }
1053
1054 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1055 {
1056         u32 value;
1057         struct atl1e_hw *hw = &adapter->hw;
1058         struct net_device *netdev = adapter->netdev;
1059
1060         /* Config MAC CTRL Register */
1061         value = MAC_CTRL_TX_EN |
1062                 MAC_CTRL_RX_EN ;
1063
1064         if (FULL_DUPLEX == adapter->link_duplex)
1065                 value |= MAC_CTRL_DUPLX;
1066
1067         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1068                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1069                           MAC_CTRL_SPEED_SHIFT);
1070         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1071
1072         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1073         value |= (((u32)adapter->hw.preamble_len &
1074                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1075
1076         __atl1e_vlan_mode(netdev->features, &value);
1077
1078         value |= MAC_CTRL_BC_EN;
1079         if (netdev->flags & IFF_PROMISC)
1080                 value |= MAC_CTRL_PROMIS_EN;
1081         if (netdev->flags & IFF_ALLMULTI)
1082                 value |= MAC_CTRL_MC_ALL_EN;
1083         if (netdev->features & NETIF_F_RXALL)
1084                 value |= MAC_CTRL_DBG;
1085         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1086 }
1087
1088 /**
1089  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1090  * @adapter: board private structure
1091  *
1092  * Configure the Tx /Rx unit of the MAC after a reset.
1093  */
1094 static int atl1e_configure(struct atl1e_adapter *adapter)
1095 {
1096         struct atl1e_hw *hw = &adapter->hw;
1097
1098         u32 intr_status_data = 0;
1099
1100         /* clear interrupt status */
1101         AT_WRITE_REG(hw, REG_ISR, ~0);
1102
1103         /* 1. set MAC Address */
1104         atl1e_hw_set_mac_addr(hw);
1105
1106         /* 2. Init the Multicast HASH table done by set_muti */
1107
1108         /* 3. Clear any WOL status */
1109         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1110
1111         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1112          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1113          *    High 32bits memory */
1114         atl1e_configure_des_ring(adapter);
1115
1116         /* 5. set Interrupt Moderator Timer */
1117         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1118         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1119         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1120                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1121
1122         /* 6. rx/tx threshold to trig interrupt */
1123         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1124         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1125         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1126         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1127
1128         /* 7. set Interrupt Clear Timer */
1129         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1130
1131         /* 8. set MTU */
1132         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1133                         VLAN_HLEN + ETH_FCS_LEN);
1134
1135         /* 9. config TXQ early tx threshold */
1136         atl1e_configure_tx(adapter);
1137
1138         /* 10. config RXQ */
1139         atl1e_configure_rx(adapter);
1140
1141         /* 11. config  DMA Engine */
1142         atl1e_configure_dma(adapter);
1143
1144         /* 12. smb timer to trig interrupt */
1145         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1146
1147         intr_status_data = AT_READ_REG(hw, REG_ISR);
1148         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1149                 netdev_err(adapter->netdev,
1150                            "atl1e_configure failed, PCIE phy link down\n");
1151                 return -1;
1152         }
1153
1154         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1155         return 0;
1156 }
1157
1158 /**
1159  * atl1e_get_stats - Get System Network Statistics
1160  * @netdev: network interface device structure
1161  *
1162  * Returns the address of the device statistics structure.
1163  * The statistics are actually updated from the timer callback.
1164  */
1165 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1166 {
1167         struct atl1e_adapter *adapter = netdev_priv(netdev);
1168         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1169         struct net_device_stats *net_stats = &netdev->stats;
1170
1171         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1172         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1173         net_stats->multicast  = hw_stats->rx_mcast;
1174         net_stats->collisions = hw_stats->tx_1_col +
1175                                 hw_stats->tx_2_col +
1176                                 hw_stats->tx_late_col +
1177                                 hw_stats->tx_abort_col;
1178
1179         net_stats->rx_errors  = hw_stats->rx_frag +
1180                                 hw_stats->rx_fcs_err +
1181                                 hw_stats->rx_len_err +
1182                                 hw_stats->rx_sz_ov +
1183                                 hw_stats->rx_rrd_ov +
1184                                 hw_stats->rx_align_err +
1185                                 hw_stats->rx_rxf_ov;
1186
1187         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1188         net_stats->rx_length_errors = hw_stats->rx_len_err;
1189         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1190         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1191         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1192
1193         net_stats->tx_errors = hw_stats->tx_late_col +
1194                                hw_stats->tx_abort_col +
1195                                hw_stats->tx_underrun +
1196                                hw_stats->tx_trunc;
1197
1198         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1199         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1200         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1201
1202         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1203         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1204
1205         return net_stats;
1206 }
1207
1208 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1209 {
1210         u16 hw_reg_addr = 0;
1211         unsigned long *stats_item = NULL;
1212
1213         /* update rx status */
1214         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1215         stats_item  = &adapter->hw_stats.rx_ok;
1216         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1217                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1218                 stats_item++;
1219                 hw_reg_addr += 4;
1220         }
1221         /* update tx status */
1222         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1223         stats_item  = &adapter->hw_stats.tx_ok;
1224         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1225                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1226                 stats_item++;
1227                 hw_reg_addr += 4;
1228         }
1229 }
1230
1231 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1232 {
1233         u16 phy_data;
1234
1235         spin_lock(&adapter->mdio_lock);
1236         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1237         spin_unlock(&adapter->mdio_lock);
1238 }
1239
1240 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1241 {
1242         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1243         struct atl1e_tx_buffer *tx_buffer = NULL;
1244         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1245         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1246
1247         while (next_to_clean != hw_next_to_clean) {
1248                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1249                 if (tx_buffer->dma) {
1250                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1251                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1252                                         tx_buffer->length, PCI_DMA_TODEVICE);
1253                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1254                                 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1255                                         tx_buffer->length, PCI_DMA_TODEVICE);
1256                         tx_buffer->dma = 0;
1257                 }
1258
1259                 if (tx_buffer->skb) {
1260                         dev_kfree_skb_irq(tx_buffer->skb);
1261                         tx_buffer->skb = NULL;
1262                 }
1263
1264                 if (++next_to_clean == tx_ring->count)
1265                         next_to_clean = 0;
1266         }
1267
1268         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1269
1270         if (netif_queue_stopped(adapter->netdev) &&
1271                         netif_carrier_ok(adapter->netdev)) {
1272                 netif_wake_queue(adapter->netdev);
1273         }
1274
1275         return true;
1276 }
1277
1278 /**
1279  * atl1e_intr - Interrupt Handler
1280  * @irq: interrupt number
1281  * @data: pointer to a network interface device structure
1282  */
1283 static irqreturn_t atl1e_intr(int irq, void *data)
1284 {
1285         struct net_device *netdev  = data;
1286         struct atl1e_adapter *adapter = netdev_priv(netdev);
1287         struct atl1e_hw *hw = &adapter->hw;
1288         int max_ints = AT_MAX_INT_WORK;
1289         int handled = IRQ_NONE;
1290         u32 status;
1291
1292         do {
1293                 status = AT_READ_REG(hw, REG_ISR);
1294                 if ((status & IMR_NORMAL_MASK) == 0 ||
1295                                 (status & ISR_DIS_INT) != 0) {
1296                         if (max_ints != AT_MAX_INT_WORK)
1297                                 handled = IRQ_HANDLED;
1298                         break;
1299                 }
1300                 /* link event */
1301                 if (status & ISR_GPHY)
1302                         atl1e_clear_phy_int(adapter);
1303                 /* Ack ISR */
1304                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1305
1306                 handled = IRQ_HANDLED;
1307                 /* check if PCIE PHY Link down */
1308                 if (status & ISR_PHY_LINKDOWN) {
1309                         netdev_err(adapter->netdev,
1310                                    "pcie phy linkdown %x\n", status);
1311                         if (netif_running(adapter->netdev)) {
1312                                 /* reset MAC */
1313                                 atl1e_irq_reset(adapter);
1314                                 schedule_work(&adapter->reset_task);
1315                                 break;
1316                         }
1317                 }
1318
1319                 /* check if DMA read/write error */
1320                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1321                         netdev_err(adapter->netdev,
1322                                    "PCIE DMA RW error (status = 0x%x)\n",
1323                                    status);
1324                         atl1e_irq_reset(adapter);
1325                         schedule_work(&adapter->reset_task);
1326                         break;
1327                 }
1328
1329                 if (status & ISR_SMB)
1330                         atl1e_update_hw_stats(adapter);
1331
1332                 /* link event */
1333                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1334                         netdev->stats.tx_carrier_errors++;
1335                         atl1e_link_chg_event(adapter);
1336                         break;
1337                 }
1338
1339                 /* transmit event */
1340                 if (status & ISR_TX_EVENT)
1341                         atl1e_clean_tx_irq(adapter);
1342
1343                 if (status & ISR_RX_EVENT) {
1344                         /*
1345                          * disable rx interrupts, without
1346                          * the synchronize_irq bit
1347                          */
1348                         AT_WRITE_REG(hw, REG_IMR,
1349                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1350                         AT_WRITE_FLUSH(hw);
1351                         if (likely(napi_schedule_prep(
1352                                    &adapter->napi)))
1353                                 __napi_schedule(&adapter->napi);
1354                 }
1355         } while (--max_ints > 0);
1356         /* re-enable Interrupt*/
1357         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1358
1359         return handled;
1360 }
1361
1362 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1363                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1364 {
1365         u8 *packet = (u8 *)(prrs + 1);
1366         struct iphdr *iph;
1367         u16 head_len = ETH_HLEN;
1368         u16 pkt_flags;
1369         u16 err_flags;
1370
1371         skb_checksum_none_assert(skb);
1372         pkt_flags = prrs->pkt_flag;
1373         err_flags = prrs->err_flag;
1374         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1375                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1376                 if (pkt_flags & RRS_IS_IPV4) {
1377                         if (pkt_flags & RRS_IS_802_3)
1378                                 head_len += 8;
1379                         iph = (struct iphdr *) (packet + head_len);
1380                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1381                                 goto hw_xsum;
1382                 }
1383                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1384                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1385                         return;
1386                 }
1387         }
1388
1389 hw_xsum :
1390         return;
1391 }
1392
1393 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1394                                                u8 que)
1395 {
1396         struct atl1e_rx_page_desc *rx_page_desc =
1397                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1398         u8 rx_using = rx_page_desc[que].rx_using;
1399
1400         return &(rx_page_desc[que].rx_page[rx_using]);
1401 }
1402
1403 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1404                    int *work_done, int work_to_do)
1405 {
1406         struct net_device *netdev  = adapter->netdev;
1407         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1408         struct atl1e_rx_page_desc *rx_page_desc =
1409                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1410         struct sk_buff *skb = NULL;
1411         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1412         u32 packet_size, write_offset;
1413         struct atl1e_recv_ret_status *prrs;
1414
1415         write_offset = *(rx_page->write_offset_addr);
1416         if (likely(rx_page->read_offset < write_offset)) {
1417                 do {
1418                         if (*work_done >= work_to_do)
1419                                 break;
1420                         (*work_done)++;
1421                         /* get new packet's  rrs */
1422                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1423                                                  rx_page->read_offset);
1424                         /* check sequence number */
1425                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1426                                 netdev_err(netdev,
1427                                            "rx sequence number error (rx=%d) (expect=%d)\n",
1428                                            prrs->seq_num,
1429                                            rx_page_desc[que].rx_nxseq);
1430                                 rx_page_desc[que].rx_nxseq++;
1431                                 /* just for debug use */
1432                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1433                                              (((u32)prrs->seq_num) << 16) |
1434                                              rx_page_desc[que].rx_nxseq);
1435                                 goto fatal_err;
1436                         }
1437                         rx_page_desc[que].rx_nxseq++;
1438
1439                         /* error packet */
1440                         if ((prrs->pkt_flag & RRS_IS_ERR_FRAME) &&
1441                             !(netdev->features & NETIF_F_RXALL)) {
1442                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1443                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1444                                         RRS_ERR_TRUNC)) {
1445                                 /* hardware error, discard this packet*/
1446                                         netdev_err(netdev,
1447                                                    "rx packet desc error %x\n",
1448                                                    *((u32 *)prrs + 1));
1449                                         goto skip_pkt;
1450                                 }
1451                         }
1452
1453                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1454                                         RRS_PKT_SIZE_MASK);
1455                         if (likely(!(netdev->features & NETIF_F_RXFCS)))
1456                                 packet_size -= 4; /* CRC */
1457
1458                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1459                         if (skb == NULL)
1460                                 goto skip_pkt;
1461
1462                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1463                         skb_put(skb, packet_size);
1464                         skb->protocol = eth_type_trans(skb, netdev);
1465                         atl1e_rx_checksum(adapter, skb, prrs);
1466
1467                         if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1468                                 u16 vlan_tag = (prrs->vtag >> 4) |
1469                                                ((prrs->vtag & 7) << 13) |
1470                                                ((prrs->vtag & 8) << 9);
1471                                 netdev_dbg(netdev,
1472                                            "RXD VLAN TAG<RRD>=0x%04x\n",
1473                                            prrs->vtag);
1474                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1475                         }
1476                         napi_gro_receive(&adapter->napi, skb);
1477
1478 skip_pkt:
1479         /* skip current packet whether it's ok or not. */
1480                         rx_page->read_offset +=
1481                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1482                                 RRS_PKT_SIZE_MASK) +
1483                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1484                                                 0xFFFFFFE0);
1485
1486                         if (rx_page->read_offset >= rx_ring->page_size) {
1487                                 /* mark this page clean */
1488                                 u16 reg_addr;
1489                                 u8  rx_using;
1490
1491                                 rx_page->read_offset =
1492                                         *(rx_page->write_offset_addr) = 0;
1493                                 rx_using = rx_page_desc[que].rx_using;
1494                                 reg_addr =
1495                                         atl1e_rx_page_vld_regs[que][rx_using];
1496                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1497                                 rx_page_desc[que].rx_using ^= 1;
1498                                 rx_page = atl1e_get_rx_page(adapter, que);
1499                         }
1500                         write_offset = *(rx_page->write_offset_addr);
1501                 } while (rx_page->read_offset < write_offset);
1502         }
1503
1504         return;
1505
1506 fatal_err:
1507         if (!test_bit(__AT_DOWN, &adapter->flags))
1508                 schedule_work(&adapter->reset_task);
1509 }
1510
1511 /**
1512  * atl1e_clean - NAPI Rx polling callback
1513  */
1514 static int atl1e_clean(struct napi_struct *napi, int budget)
1515 {
1516         struct atl1e_adapter *adapter =
1517                         container_of(napi, struct atl1e_adapter, napi);
1518         u32 imr_data;
1519         int work_done = 0;
1520
1521         /* Keep link state information with original netdev */
1522         if (!netif_carrier_ok(adapter->netdev))
1523                 goto quit_polling;
1524
1525         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1526
1527         /* If no Tx and not enough Rx work done, exit the polling mode */
1528         if (work_done < budget) {
1529 quit_polling:
1530                 napi_complete_done(napi, work_done);
1531                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1532                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1533                 /* test debug */
1534                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1535                         atomic_dec(&adapter->irq_sem);
1536                         netdev_err(adapter->netdev,
1537                                    "atl1e_clean is called when AT_DOWN\n");
1538                 }
1539                 /* reenable RX intr */
1540                 /*atl1e_irq_enable(adapter); */
1541
1542         }
1543         return work_done;
1544 }
1545
1546 #ifdef CONFIG_NET_POLL_CONTROLLER
1547
1548 /*
1549  * Polling 'interrupt' - used by things like netconsole to send skbs
1550  * without having to re-enable interrupts. It's not called while
1551  * the interrupt routine is executing.
1552  */
1553 static void atl1e_netpoll(struct net_device *netdev)
1554 {
1555         struct atl1e_adapter *adapter = netdev_priv(netdev);
1556
1557         disable_irq(adapter->pdev->irq);
1558         atl1e_intr(adapter->pdev->irq, netdev);
1559         enable_irq(adapter->pdev->irq);
1560 }
1561 #endif
1562
1563 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1564 {
1565         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1566         u16 next_to_use = 0;
1567         u16 next_to_clean = 0;
1568
1569         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1570         next_to_use   = tx_ring->next_to_use;
1571
1572         return (u16)(next_to_clean > next_to_use) ?
1573                 (next_to_clean - next_to_use - 1) :
1574                 (tx_ring->count + next_to_clean - next_to_use - 1);
1575 }
1576
1577 /*
1578  * get next usable tpd
1579  * Note: should call atl1e_tdp_avail to make sure
1580  * there is enough tpd to use
1581  */
1582 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1583 {
1584         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1585         u16 next_to_use = 0;
1586
1587         next_to_use = tx_ring->next_to_use;
1588         if (++tx_ring->next_to_use == tx_ring->count)
1589                 tx_ring->next_to_use = 0;
1590
1591         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1592         return &tx_ring->desc[next_to_use];
1593 }
1594
1595 static struct atl1e_tx_buffer *
1596 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1597 {
1598         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1599
1600         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1601 }
1602
1603 /* Calculate the transmit packet descript needed*/
1604 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1605 {
1606         int i = 0;
1607         u16 tpd_req = 1;
1608         u16 fg_size = 0;
1609         u16 proto_hdr_len = 0;
1610
1611         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1612                 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1613                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1614         }
1615
1616         if (skb_is_gso(skb)) {
1617                 if (skb->protocol == htons(ETH_P_IP) ||
1618                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1619                         proto_hdr_len = skb_transport_offset(skb) +
1620                                         tcp_hdrlen(skb);
1621                         if (proto_hdr_len < skb_headlen(skb)) {
1622                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1623                                            MAX_TX_BUF_LEN - 1) >>
1624                                            MAX_TX_BUF_SHIFT);
1625                         }
1626                 }
1627
1628         }
1629         return tpd_req;
1630 }
1631
1632 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1633                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1634 {
1635         unsigned short offload_type;
1636         u8 hdr_len;
1637         u32 real_len;
1638
1639         if (skb_is_gso(skb)) {
1640                 int err;
1641
1642                 err = skb_cow_head(skb, 0);
1643                 if (err < 0)
1644                         return err;
1645
1646                 offload_type = skb_shinfo(skb)->gso_type;
1647
1648                 if (offload_type & SKB_GSO_TCPV4) {
1649                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1650                                         + ntohs(ip_hdr(skb)->tot_len));
1651
1652                         if (real_len < skb->len)
1653                                 pskb_trim(skb, real_len);
1654
1655                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1656                         if (unlikely(skb->len == hdr_len)) {
1657                                 /* only xsum need */
1658                                 netdev_warn(adapter->netdev,
1659                                             "IPV4 tso with zero data??\n");
1660                                 goto check_sum;
1661                         } else {
1662                                 ip_hdr(skb)->check = 0;
1663                                 ip_hdr(skb)->tot_len = 0;
1664                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1665                                                         ip_hdr(skb)->saddr,
1666                                                         ip_hdr(skb)->daddr,
1667                                                         0, IPPROTO_TCP, 0);
1668                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1669                                         TDP_V4_IPHL_MASK) <<
1670                                         TPD_V4_IPHL_SHIFT;
1671                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1672                                         TPD_TCPHDRLEN_MASK) <<
1673                                         TPD_TCPHDRLEN_SHIFT;
1674                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1675                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1676                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1677                         }
1678                         return 0;
1679                 }
1680         }
1681
1682 check_sum:
1683         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1684                 u8 css, cso;
1685
1686                 cso = skb_checksum_start_offset(skb);
1687                 if (unlikely(cso & 0x1)) {
1688                         netdev_err(adapter->netdev,
1689                                    "payload offset should not ant event number\n");
1690                         return -1;
1691                 } else {
1692                         css = cso + skb->csum_offset;
1693                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1694                                         TPD_PLOADOFFSET_SHIFT;
1695                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1696                                         TPD_CCSUMOFFSET_SHIFT;
1697                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1698                 }
1699         }
1700
1701         return 0;
1702 }
1703
1704 static int atl1e_tx_map(struct atl1e_adapter *adapter,
1705                         struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1706 {
1707         struct atl1e_tpd_desc *use_tpd = NULL;
1708         struct atl1e_tx_buffer *tx_buffer = NULL;
1709         u16 buf_len = skb_headlen(skb);
1710         u16 map_len = 0;
1711         u16 mapped_len = 0;
1712         u16 hdr_len = 0;
1713         u16 nr_frags;
1714         u16 f;
1715         int segment;
1716         int ring_start = adapter->tx_ring.next_to_use;
1717         int ring_end;
1718
1719         nr_frags = skb_shinfo(skb)->nr_frags;
1720         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1721         if (segment) {
1722                 /* TSO */
1723                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1724                 use_tpd = tpd;
1725
1726                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1727                 tx_buffer->length = map_len;
1728                 tx_buffer->dma = pci_map_single(adapter->pdev,
1729                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1730                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1731                         return -ENOSPC;
1732
1733                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1734                 mapped_len += map_len;
1735                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1736                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1737                         ((cpu_to_le32(tx_buffer->length) &
1738                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1739         }
1740
1741         while (mapped_len < buf_len) {
1742                 /* mapped_len == 0, means we should use the first tpd,
1743                    which is given by caller  */
1744                 if (mapped_len == 0) {
1745                         use_tpd = tpd;
1746                 } else {
1747                         use_tpd = atl1e_get_tpd(adapter);
1748                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1749                 }
1750                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1751                 tx_buffer->skb = NULL;
1752
1753                 tx_buffer->length = map_len =
1754                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1755                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1756                 tx_buffer->dma =
1757                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1758                                         map_len, PCI_DMA_TODEVICE);
1759
1760                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1761                         /* We need to unwind the mappings we've done */
1762                         ring_end = adapter->tx_ring.next_to_use;
1763                         adapter->tx_ring.next_to_use = ring_start;
1764                         while (adapter->tx_ring.next_to_use != ring_end) {
1765                                 tpd = atl1e_get_tpd(adapter);
1766                                 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1767                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1768                                                  tx_buffer->length, PCI_DMA_TODEVICE);
1769                         }
1770                         /* Reset the tx rings next pointer */
1771                         adapter->tx_ring.next_to_use = ring_start;
1772                         return -ENOSPC;
1773                 }
1774
1775                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1776                 mapped_len  += map_len;
1777                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1778                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1779                         ((cpu_to_le32(tx_buffer->length) &
1780                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1781         }
1782
1783         for (f = 0; f < nr_frags; f++) {
1784                 const struct skb_frag_struct *frag;
1785                 u16 i;
1786                 u16 seg_num;
1787
1788                 frag = &skb_shinfo(skb)->frags[f];
1789                 buf_len = skb_frag_size(frag);
1790
1791                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1792                 for (i = 0; i < seg_num; i++) {
1793                         use_tpd = atl1e_get_tpd(adapter);
1794                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1795
1796                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1797                         BUG_ON(tx_buffer->skb);
1798
1799                         tx_buffer->skb = NULL;
1800                         tx_buffer->length =
1801                                 (buf_len > MAX_TX_BUF_LEN) ?
1802                                 MAX_TX_BUF_LEN : buf_len;
1803                         buf_len -= tx_buffer->length;
1804
1805                         tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1806                                                           frag,
1807                                                           (i * MAX_TX_BUF_LEN),
1808                                                           tx_buffer->length,
1809                                                           DMA_TO_DEVICE);
1810
1811                         if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1812                                 /* We need to unwind the mappings we've done */
1813                                 ring_end = adapter->tx_ring.next_to_use;
1814                                 adapter->tx_ring.next_to_use = ring_start;
1815                                 while (adapter->tx_ring.next_to_use != ring_end) {
1816                                         tpd = atl1e_get_tpd(adapter);
1817                                         tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1818                                         dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1819                                                        tx_buffer->length, DMA_TO_DEVICE);
1820                                 }
1821
1822                                 /* Reset the ring next to use pointer */
1823                                 adapter->tx_ring.next_to_use = ring_start;
1824                                 return -ENOSPC;
1825                         }
1826
1827                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1828                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1829                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1830                                         ((cpu_to_le32(tx_buffer->length) &
1831                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1832                 }
1833         }
1834
1835         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1836                 /* note this one is a tcp header */
1837                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1838         /* The last tpd */
1839
1840         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1841         /* The last buffer info contain the skb address,
1842            so it will be free after unmap */
1843         tx_buffer->skb = skb;
1844         return 0;
1845 }
1846
1847 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1848                            struct atl1e_tpd_desc *tpd)
1849 {
1850         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1851         /* Force memory writes to complete before letting h/w
1852          * know there are new descriptors to fetch.  (Only
1853          * applicable for weak-ordered memory model archs,
1854          * such as IA-64). */
1855         wmb();
1856         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1857 }
1858
1859 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1860                                           struct net_device *netdev)
1861 {
1862         struct atl1e_adapter *adapter = netdev_priv(netdev);
1863         u16 tpd_req = 1;
1864         struct atl1e_tpd_desc *tpd;
1865
1866         if (test_bit(__AT_DOWN, &adapter->flags)) {
1867                 dev_kfree_skb_any(skb);
1868                 return NETDEV_TX_OK;
1869         }
1870
1871         if (unlikely(skb->len <= 0)) {
1872                 dev_kfree_skb_any(skb);
1873                 return NETDEV_TX_OK;
1874         }
1875         tpd_req = atl1e_cal_tdp_req(skb);
1876
1877         if (atl1e_tpd_avail(adapter) < tpd_req) {
1878                 /* no enough descriptor, just stop queue */
1879                 netif_stop_queue(netdev);
1880                 return NETDEV_TX_BUSY;
1881         }
1882
1883         tpd = atl1e_get_tpd(adapter);
1884
1885         if (skb_vlan_tag_present(skb)) {
1886                 u16 vlan_tag = skb_vlan_tag_get(skb);
1887                 u16 atl1e_vlan_tag;
1888
1889                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1890                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1891                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1892                                 TPD_VLAN_SHIFT;
1893         }
1894
1895         if (skb->protocol == htons(ETH_P_8021Q))
1896                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1897
1898         if (skb_network_offset(skb) != ETH_HLEN)
1899                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1900
1901         /* do TSO and check sum */
1902         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1903                 dev_kfree_skb_any(skb);
1904                 return NETDEV_TX_OK;
1905         }
1906
1907         if (atl1e_tx_map(adapter, skb, tpd)) {
1908                 dev_kfree_skb_any(skb);
1909                 goto out;
1910         }
1911
1912         atl1e_tx_queue(adapter, tpd_req, tpd);
1913 out:
1914         return NETDEV_TX_OK;
1915 }
1916
1917 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1918 {
1919         struct net_device *netdev = adapter->netdev;
1920
1921         free_irq(adapter->pdev->irq, netdev);
1922 }
1923
1924 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1925 {
1926         struct pci_dev    *pdev   = adapter->pdev;
1927         struct net_device *netdev = adapter->netdev;
1928         int err = 0;
1929
1930         err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1931                           netdev);
1932         if (err) {
1933                 netdev_dbg(adapter->netdev,
1934                            "Unable to allocate interrupt Error: %d\n", err);
1935                 return err;
1936         }
1937         netdev_dbg(netdev, "atl1e_request_irq OK\n");
1938         return err;
1939 }
1940
1941 int atl1e_up(struct atl1e_adapter *adapter)
1942 {
1943         struct net_device *netdev = adapter->netdev;
1944         int err = 0;
1945         u32 val;
1946
1947         /* hardware has been reset, we need to reload some things */
1948         err = atl1e_init_hw(&adapter->hw);
1949         if (err) {
1950                 err = -EIO;
1951                 return err;
1952         }
1953         atl1e_init_ring_ptrs(adapter);
1954         atl1e_set_multi(netdev);
1955         atl1e_restore_vlan(adapter);
1956
1957         if (atl1e_configure(adapter)) {
1958                 err = -EIO;
1959                 goto err_up;
1960         }
1961
1962         clear_bit(__AT_DOWN, &adapter->flags);
1963         napi_enable(&adapter->napi);
1964         atl1e_irq_enable(adapter);
1965         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1966         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1967                       val | MASTER_CTRL_MANUAL_INT);
1968
1969 err_up:
1970         return err;
1971 }
1972
1973 void atl1e_down(struct atl1e_adapter *adapter)
1974 {
1975         struct net_device *netdev = adapter->netdev;
1976
1977         /* signal that we're down so the interrupt handler does not
1978          * reschedule our watchdog timer */
1979         set_bit(__AT_DOWN, &adapter->flags);
1980
1981         netif_stop_queue(netdev);
1982
1983         /* reset MAC to disable all RX/TX */
1984         atl1e_reset_hw(&adapter->hw);
1985         msleep(1);
1986
1987         napi_disable(&adapter->napi);
1988         atl1e_del_timer(adapter);
1989         atl1e_irq_disable(adapter);
1990
1991         netif_carrier_off(netdev);
1992         adapter->link_speed = SPEED_0;
1993         adapter->link_duplex = -1;
1994         atl1e_clean_tx_ring(adapter);
1995         atl1e_clean_rx_ring(adapter);
1996 }
1997
1998 /**
1999  * atl1e_open - Called when a network interface is made active
2000  * @netdev: network interface device structure
2001  *
2002  * Returns 0 on success, negative value on failure
2003  *
2004  * The open entry point is called when a network interface is made
2005  * active by the system (IFF_UP).  At this point all resources needed
2006  * for transmit and receive operations are allocated, the interrupt
2007  * handler is registered with the OS, the watchdog timer is started,
2008  * and the stack is notified that the interface is ready.
2009  */
2010 static int atl1e_open(struct net_device *netdev)
2011 {
2012         struct atl1e_adapter *adapter = netdev_priv(netdev);
2013         int err;
2014
2015         /* disallow open during test */
2016         if (test_bit(__AT_TESTING, &adapter->flags))
2017                 return -EBUSY;
2018
2019         /* allocate rx/tx dma buffer & descriptors */
2020         atl1e_init_ring_resources(adapter);
2021         err = atl1e_setup_ring_resources(adapter);
2022         if (unlikely(err))
2023                 return err;
2024
2025         err = atl1e_request_irq(adapter);
2026         if (unlikely(err))
2027                 goto err_req_irq;
2028
2029         err = atl1e_up(adapter);
2030         if (unlikely(err))
2031                 goto err_up;
2032
2033         return 0;
2034
2035 err_up:
2036         atl1e_free_irq(adapter);
2037 err_req_irq:
2038         atl1e_free_ring_resources(adapter);
2039         atl1e_reset_hw(&adapter->hw);
2040
2041         return err;
2042 }
2043
2044 /**
2045  * atl1e_close - Disables a network interface
2046  * @netdev: network interface device structure
2047  *
2048  * Returns 0, this is not allowed to fail
2049  *
2050  * The close entry point is called when an interface is de-activated
2051  * by the OS.  The hardware is still under the drivers control, but
2052  * needs to be disabled.  A global MAC reset is issued to stop the
2053  * hardware, and all transmit and receive resources are freed.
2054  */
2055 static int atl1e_close(struct net_device *netdev)
2056 {
2057         struct atl1e_adapter *adapter = netdev_priv(netdev);
2058
2059         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2060         atl1e_down(adapter);
2061         atl1e_free_irq(adapter);
2062         atl1e_free_ring_resources(adapter);
2063
2064         return 0;
2065 }
2066
2067 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2068 {
2069         struct net_device *netdev = pci_get_drvdata(pdev);
2070         struct atl1e_adapter *adapter = netdev_priv(netdev);
2071         struct atl1e_hw *hw = &adapter->hw;
2072         u32 ctrl = 0;
2073         u32 mac_ctrl_data = 0;
2074         u32 wol_ctrl_data = 0;
2075         u16 mii_advertise_data = 0;
2076         u16 mii_bmsr_data = 0;
2077         u16 mii_intr_status_data = 0;
2078         u32 wufc = adapter->wol;
2079         u32 i;
2080 #ifdef CONFIG_PM
2081         int retval = 0;
2082 #endif
2083
2084         if (netif_running(netdev)) {
2085                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2086                 atl1e_down(adapter);
2087         }
2088         netif_device_detach(netdev);
2089
2090 #ifdef CONFIG_PM
2091         retval = pci_save_state(pdev);
2092         if (retval)
2093                 return retval;
2094 #endif
2095
2096         if (wufc) {
2097                 /* get link status */
2098                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2099                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2100
2101                 mii_advertise_data = ADVERTISE_10HALF;
2102
2103                 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2104                     (atl1e_write_phy_reg(hw,
2105                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2106                     (atl1e_phy_commit(hw)) != 0) {
2107                         netdev_dbg(adapter->netdev, "set phy register failed\n");
2108                         goto wol_dis;
2109                 }
2110
2111                 hw->phy_configured = false; /* re-init PHY when resume */
2112
2113                 /* turn on magic packet wol */
2114                 if (wufc & AT_WUFC_MAG)
2115                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2116
2117                 if (wufc & AT_WUFC_LNKC) {
2118                 /* if orignal link status is link, just wait for retrive link */
2119                         if (mii_bmsr_data & BMSR_LSTATUS) {
2120                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2121                                         msleep(100);
2122                                         atl1e_read_phy_reg(hw, MII_BMSR,
2123                                                         &mii_bmsr_data);
2124                                         if (mii_bmsr_data & BMSR_LSTATUS)
2125                                                 break;
2126                                 }
2127
2128                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2129                                         netdev_dbg(adapter->netdev,
2130                                                    "Link may change when suspend\n");
2131                         }
2132                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2133                         /* only link up can wake up */
2134                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2135                                 netdev_dbg(adapter->netdev,
2136                                            "read write phy register failed\n");
2137                                 goto wol_dis;
2138                         }
2139                 }
2140                 /* clear phy interrupt */
2141                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2142                 /* Config MAC Ctrl register */
2143                 mac_ctrl_data = MAC_CTRL_RX_EN;
2144                 /* set to 10/100M halt duplex */
2145                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2146                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2147                                  MAC_CTRL_PRMLEN_MASK) <<
2148                                  MAC_CTRL_PRMLEN_SHIFT);
2149
2150                 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2151
2152                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2153                 if (wufc & AT_WUFC_MAG)
2154                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2155
2156                 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2157                            mac_ctrl_data);
2158
2159                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2160                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2161                 /* pcie patch */
2162                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2163                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2164                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2165                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2166                 goto suspend_exit;
2167         }
2168 wol_dis:
2169
2170         /* WOL disabled */
2171         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2172
2173         /* pcie patch */
2174         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2175         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2176         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2177
2178         atl1e_force_ps(hw);
2179         hw->phy_configured = false; /* re-init PHY when resume */
2180
2181         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2182
2183 suspend_exit:
2184
2185         if (netif_running(netdev))
2186                 atl1e_free_irq(adapter);
2187
2188         pci_disable_device(pdev);
2189
2190         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2191
2192         return 0;
2193 }
2194
2195 #ifdef CONFIG_PM
2196 static int atl1e_resume(struct pci_dev *pdev)
2197 {
2198         struct net_device *netdev = pci_get_drvdata(pdev);
2199         struct atl1e_adapter *adapter = netdev_priv(netdev);
2200         u32 err;
2201
2202         pci_set_power_state(pdev, PCI_D0);
2203         pci_restore_state(pdev);
2204
2205         err = pci_enable_device(pdev);
2206         if (err) {
2207                 netdev_err(adapter->netdev,
2208                            "Cannot enable PCI device from suspend\n");
2209                 return err;
2210         }
2211
2212         pci_set_master(pdev);
2213
2214         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2215
2216         pci_enable_wake(pdev, PCI_D3hot, 0);
2217         pci_enable_wake(pdev, PCI_D3cold, 0);
2218
2219         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2220
2221         if (netif_running(netdev)) {
2222                 err = atl1e_request_irq(adapter);
2223                 if (err)
2224                         return err;
2225         }
2226
2227         atl1e_reset_hw(&adapter->hw);
2228
2229         if (netif_running(netdev))
2230                 atl1e_up(adapter);
2231
2232         netif_device_attach(netdev);
2233
2234         return 0;
2235 }
2236 #endif
2237
2238 static void atl1e_shutdown(struct pci_dev *pdev)
2239 {
2240         atl1e_suspend(pdev, PMSG_SUSPEND);
2241 }
2242
2243 static const struct net_device_ops atl1e_netdev_ops = {
2244         .ndo_open               = atl1e_open,
2245         .ndo_stop               = atl1e_close,
2246         .ndo_start_xmit         = atl1e_xmit_frame,
2247         .ndo_get_stats          = atl1e_get_stats,
2248         .ndo_set_rx_mode        = atl1e_set_multi,
2249         .ndo_validate_addr      = eth_validate_addr,
2250         .ndo_set_mac_address    = atl1e_set_mac_addr,
2251         .ndo_fix_features       = atl1e_fix_features,
2252         .ndo_set_features       = atl1e_set_features,
2253         .ndo_change_mtu         = atl1e_change_mtu,
2254         .ndo_do_ioctl           = atl1e_ioctl,
2255         .ndo_tx_timeout         = atl1e_tx_timeout,
2256 #ifdef CONFIG_NET_POLL_CONTROLLER
2257         .ndo_poll_controller    = atl1e_netpoll,
2258 #endif
2259
2260 };
2261
2262 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2263 {
2264         SET_NETDEV_DEV(netdev, &pdev->dev);
2265         pci_set_drvdata(pdev, netdev);
2266
2267         netdev->netdev_ops = &atl1e_netdev_ops;
2268
2269         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2270         /* MTU range: 42 - 8170 */
2271         netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2272         netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
2273                           (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2274         atl1e_set_ethtool_ops(netdev);
2275
2276         netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2277                               NETIF_F_HW_VLAN_CTAG_RX;
2278         netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_TX;
2279         /* not enabled by default */
2280         netdev->hw_features |= NETIF_F_RXALL | NETIF_F_RXFCS;
2281         return 0;
2282 }
2283
2284 /**
2285  * atl1e_probe - Device Initialization Routine
2286  * @pdev: PCI device information struct
2287  * @ent: entry in atl1e_pci_tbl
2288  *
2289  * Returns 0 on success, negative on failure
2290  *
2291  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2292  * The OS initialization, configuring of the adapter private structure,
2293  * and a hardware reset occur.
2294  */
2295 static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2296 {
2297         struct net_device *netdev;
2298         struct atl1e_adapter *adapter = NULL;
2299         static int cards_found;
2300
2301         int err = 0;
2302
2303         err = pci_enable_device(pdev);
2304         if (err) {
2305                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2306                 return err;
2307         }
2308
2309         /*
2310          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2311          * shared register for the high 32 bits, so only a single, aligned,
2312          * 4 GB physical address range can be used at a time.
2313          *
2314          * Supporting 64-bit DMA on this hardware is more trouble than it's
2315          * worth.  It is far easier to limit to 32-bit DMA than update
2316          * various kernel subsystems to support the mechanics required by a
2317          * fixed-high-32-bit system.
2318          */
2319         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2320             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2321                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2322                 goto err_dma;
2323         }
2324
2325         err = pci_request_regions(pdev, atl1e_driver_name);
2326         if (err) {
2327                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2328                 goto err_pci_reg;
2329         }
2330
2331         pci_set_master(pdev);
2332
2333         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2334         if (netdev == NULL) {
2335                 err = -ENOMEM;
2336                 goto err_alloc_etherdev;
2337         }
2338
2339         err = atl1e_init_netdev(netdev, pdev);
2340         if (err) {
2341                 netdev_err(netdev, "init netdevice failed\n");
2342                 goto err_init_netdev;
2343         }
2344         adapter = netdev_priv(netdev);
2345         adapter->bd_number = cards_found;
2346         adapter->netdev = netdev;
2347         adapter->pdev = pdev;
2348         adapter->hw.adapter = adapter;
2349         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2350         if (!adapter->hw.hw_addr) {
2351                 err = -EIO;
2352                 netdev_err(netdev, "cannot map device registers\n");
2353                 goto err_ioremap;
2354         }
2355
2356         /* init mii data */
2357         adapter->mii.dev = netdev;
2358         adapter->mii.mdio_read  = atl1e_mdio_read;
2359         adapter->mii.mdio_write = atl1e_mdio_write;
2360         adapter->mii.phy_id_mask = 0x1f;
2361         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2362
2363         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2364
2365         timer_setup(&adapter->phy_config_timer, atl1e_phy_config, 0);
2366
2367         /* get user settings */
2368         atl1e_check_options(adapter);
2369         /*
2370          * Mark all PCI regions associated with PCI device
2371          * pdev as being reserved by owner atl1e_driver_name
2372          * Enables bus-mastering on the device and calls
2373          * pcibios_set_master to do the needed arch specific settings
2374          */
2375         atl1e_setup_pcicmd(pdev);
2376         /* setup the private structure */
2377         err = atl1e_sw_init(adapter);
2378         if (err) {
2379                 netdev_err(netdev, "net device private data init failed\n");
2380                 goto err_sw_init;
2381         }
2382
2383         /* Init GPHY as early as possible due to power saving issue  */
2384         atl1e_phy_init(&adapter->hw);
2385         /* reset the controller to
2386          * put the device in a known good starting state */
2387         err = atl1e_reset_hw(&adapter->hw);
2388         if (err) {
2389                 err = -EIO;
2390                 goto err_reset;
2391         }
2392
2393         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2394                 err = -EIO;
2395                 netdev_err(netdev, "get mac address failed\n");
2396                 goto err_eeprom;
2397         }
2398
2399         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2400         netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2401
2402         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2403         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2404         netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2405         err = register_netdev(netdev);
2406         if (err) {
2407                 netdev_err(netdev, "register netdevice failed\n");
2408                 goto err_register;
2409         }
2410
2411         /* assume we have no link for now */
2412         netif_stop_queue(netdev);
2413         netif_carrier_off(netdev);
2414
2415         cards_found++;
2416
2417         return 0;
2418
2419 err_reset:
2420 err_register:
2421 err_sw_init:
2422 err_eeprom:
2423         pci_iounmap(pdev, adapter->hw.hw_addr);
2424 err_init_netdev:
2425 err_ioremap:
2426         free_netdev(netdev);
2427 err_alloc_etherdev:
2428         pci_release_regions(pdev);
2429 err_pci_reg:
2430 err_dma:
2431         pci_disable_device(pdev);
2432         return err;
2433 }
2434
2435 /**
2436  * atl1e_remove - Device Removal Routine
2437  * @pdev: PCI device information struct
2438  *
2439  * atl1e_remove is called by the PCI subsystem to alert the driver
2440  * that it should release a PCI device.  The could be caused by a
2441  * Hot-Plug event, or because the driver is going to be removed from
2442  * memory.
2443  */
2444 static void atl1e_remove(struct pci_dev *pdev)
2445 {
2446         struct net_device *netdev = pci_get_drvdata(pdev);
2447         struct atl1e_adapter *adapter = netdev_priv(netdev);
2448
2449         /*
2450          * flush_scheduled work may reschedule our watchdog task, so
2451          * explicitly disable watchdog tasks from being rescheduled
2452          */
2453         set_bit(__AT_DOWN, &adapter->flags);
2454
2455         atl1e_del_timer(adapter);
2456         atl1e_cancel_work(adapter);
2457
2458         unregister_netdev(netdev);
2459         atl1e_free_ring_resources(adapter);
2460         atl1e_force_ps(&adapter->hw);
2461         pci_iounmap(pdev, adapter->hw.hw_addr);
2462         pci_release_regions(pdev);
2463         free_netdev(netdev);
2464         pci_disable_device(pdev);
2465 }
2466
2467 /**
2468  * atl1e_io_error_detected - called when PCI error is detected
2469  * @pdev: Pointer to PCI device
2470  * @state: The current pci connection state
2471  *
2472  * This function is called after a PCI bus error affecting
2473  * this device has been detected.
2474  */
2475 static pci_ers_result_t
2476 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2477 {
2478         struct net_device *netdev = pci_get_drvdata(pdev);
2479         struct atl1e_adapter *adapter = netdev_priv(netdev);
2480
2481         netif_device_detach(netdev);
2482
2483         if (state == pci_channel_io_perm_failure)
2484                 return PCI_ERS_RESULT_DISCONNECT;
2485
2486         if (netif_running(netdev))
2487                 atl1e_down(adapter);
2488
2489         pci_disable_device(pdev);
2490
2491         /* Request a slot slot reset. */
2492         return PCI_ERS_RESULT_NEED_RESET;
2493 }
2494
2495 /**
2496  * atl1e_io_slot_reset - called after the pci bus has been reset.
2497  * @pdev: Pointer to PCI device
2498  *
2499  * Restart the card from scratch, as if from a cold-boot. Implementation
2500  * resembles the first-half of the e1000_resume routine.
2501  */
2502 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2503 {
2504         struct net_device *netdev = pci_get_drvdata(pdev);
2505         struct atl1e_adapter *adapter = netdev_priv(netdev);
2506
2507         if (pci_enable_device(pdev)) {
2508                 netdev_err(adapter->netdev,
2509                            "Cannot re-enable PCI device after reset\n");
2510                 return PCI_ERS_RESULT_DISCONNECT;
2511         }
2512         pci_set_master(pdev);
2513
2514         pci_enable_wake(pdev, PCI_D3hot, 0);
2515         pci_enable_wake(pdev, PCI_D3cold, 0);
2516
2517         atl1e_reset_hw(&adapter->hw);
2518
2519         return PCI_ERS_RESULT_RECOVERED;
2520 }
2521
2522 /**
2523  * atl1e_io_resume - called when traffic can start flowing again.
2524  * @pdev: Pointer to PCI device
2525  *
2526  * This callback is called when the error recovery driver tells us that
2527  * its OK to resume normal operation. Implementation resembles the
2528  * second-half of the atl1e_resume routine.
2529  */
2530 static void atl1e_io_resume(struct pci_dev *pdev)
2531 {
2532         struct net_device *netdev = pci_get_drvdata(pdev);
2533         struct atl1e_adapter *adapter = netdev_priv(netdev);
2534
2535         if (netif_running(netdev)) {
2536                 if (atl1e_up(adapter)) {
2537                         netdev_err(adapter->netdev,
2538                                    "can't bring device back up after reset\n");
2539                         return;
2540                 }
2541         }
2542
2543         netif_device_attach(netdev);
2544 }
2545
2546 static const struct pci_error_handlers atl1e_err_handler = {
2547         .error_detected = atl1e_io_error_detected,
2548         .slot_reset = atl1e_io_slot_reset,
2549         .resume = atl1e_io_resume,
2550 };
2551
2552 static struct pci_driver atl1e_driver = {
2553         .name     = atl1e_driver_name,
2554         .id_table = atl1e_pci_tbl,
2555         .probe    = atl1e_probe,
2556         .remove   = atl1e_remove,
2557         /* Power Management Hooks */
2558 #ifdef CONFIG_PM
2559         .suspend  = atl1e_suspend,
2560         .resume   = atl1e_resume,
2561 #endif
2562         .shutdown = atl1e_shutdown,
2563         .err_handler = &atl1e_err_handler
2564 };
2565
2566 module_pci_driver(atl1e_driver);