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

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