drivers/net/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 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         struct pci_dev    *pdev   = adapter->pdev;
 168         int err = 0;
 169         u16 speed, duplex, phy_data;
 170
 171         /* MII_BMSR must read twise */
 172         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 173         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 174         if ((phy_data & BMSR_LSTATUS) == 0) {
 175                 /* link down */
 176                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 177                         u32 value;
 178                         /* disable rx */
 179                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 180                         value &= ~MAC_CTRL_RX_EN;
 181                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 182                         adapter->link_speed = SPEED_0;
 183                         netif_carrier_off(netdev);
 184                         netif_stop_queue(netdev);
 185                 }
 186         } else {
 187                 /* Link Up */
 188                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 189                 if (unlikely(err))
 190                         return err;
 191
 192                 /* link result is our setting */
 193                 if (adapter->link_speed != speed ||
 194                     adapter->link_duplex != duplex) {
 195                         adapter->link_speed  = speed;
 196                         adapter->link_duplex = duplex;
 197                         atl1e_setup_mac_ctrl(adapter);
 198                         dev_info(&pdev->dev,
 199                                 "%s: %s NIC Link is Up<%d Mbps %s>\n",
 200                                 atl1e_driver_name, netdev->name,
 201                                 adapter->link_speed,
 202                                 adapter->link_duplex == FULL_DUPLEX ?
 203                                 "Full Duplex" : "Half Duplex");
 204                 }
 205
 206                 if (!netif_carrier_ok(netdev)) {
 207                         /* Link down -> Up */
 208                         netif_carrier_on(netdev);
 209                         netif_wake_queue(netdev);
 210                 }
 211         }
 212         return 0;
 213 }
 214
 215 /*
 216  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 217  * @netdev: network interface device structure
 218  */
 219 static void atl1e_link_chg_task(struct work_struct *work)
 220 {
 221         struct atl1e_adapter *adapter;
 222         unsigned long flags;
 223
 224         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 225         spin_lock_irqsave(&adapter->mdio_lock, flags);
 226         atl1e_check_link(adapter);
 227         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 228 }
 229
 230 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 231 {
 232         struct net_device *netdev = adapter->netdev;
 233         struct pci_dev    *pdev   = adapter->pdev;
 234         u16 phy_data = 0;
 235         u16 link_up = 0;
 236
 237         spin_lock(&adapter->mdio_lock);
 238         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 239         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 240         spin_unlock(&adapter->mdio_lock);
 241         link_up = phy_data & BMSR_LSTATUS;
 242         /* notify upper layer link down ASAP */
 243         if (!link_up) {
 244                 if (netif_carrier_ok(netdev)) {
 245                         /* old link state: Up */
 246                         dev_info(&pdev->dev, "%s: %s NIC Link is Down\n",
 247                                         atl1e_driver_name, netdev->name);
 248                         adapter->link_speed = SPEED_0;
 249                         netif_stop_queue(netdev);
 250                 }
 251         }
 252         schedule_work(&adapter->link_chg_task);
 253 }
 254
 255 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 256 {
 257         del_timer_sync(&adapter->phy_config_timer);
 258 }
 259
 260 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 261 {
 262         cancel_work_sync(&adapter->reset_task);
 263         cancel_work_sync(&adapter->link_chg_task);
 264 }
 265
 266 /*
 267  * atl1e_tx_timeout - Respond to a Tx Hang
 268  * @netdev: network interface device structure
 269  */
 270 static void atl1e_tx_timeout(struct net_device *netdev)
 271 {
 272         struct atl1e_adapter *adapter = netdev_priv(netdev);
 273
 274         /* Do the reset outside of interrupt context */
 275         schedule_work(&adapter->reset_task);
 276 }
 277
 278 /*
 279  * atl1e_set_multi - Multicast and Promiscuous mode set
 280  * @netdev: network interface device structure
 281  *
 282  * The set_multi entry point is called whenever the multicast address
 283  * list or the network interface flags are updated.  This routine is
 284  * responsible for configuring the hardware for proper multicast,
 285  * promiscuous mode, and all-multi behavior.
 286  */
 287 static void atl1e_set_multi(struct net_device *netdev)
 288 {
 289         struct atl1e_adapter *adapter = netdev_priv(netdev);
 290         struct atl1e_hw *hw = &adapter->hw;
 291         struct dev_mc_list *mc_ptr;
 292         u32 mac_ctrl_data = 0;
 293         u32 hash_value;
 294
 295         /* Check for Promiscuous and All Multicast modes */
 296         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 297
 298         if (netdev->flags & IFF_PROMISC) {
 299                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 300         } else if (netdev->flags & IFF_ALLMULTI) {
 301                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 302                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 303         } else {
 304                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 305         }
 306
 307         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 308
 309         /* clear the old settings from the multicast hash table */
 310         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 311         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 312
 313         /* comoute mc addresses' hash value ,and put it into hash table */
 314         for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
 315                 hash_value = atl1e_hash_mc_addr(hw, mc_ptr->dmi_addr);
 316                 atl1e_hash_set(hw, hash_value);
 317         }
 318 }
 319
 320 static void atl1e_vlan_rx_register(struct net_device *netdev,
 321                                    struct vlan_group *grp)
 322 {
 323         struct atl1e_adapter *adapter = netdev_priv(netdev);
 324         struct pci_dev *pdev = adapter->pdev;
 325         u32 mac_ctrl_data = 0;
 326
 327         dev_dbg(&pdev->dev, "atl1e_vlan_rx_register\n");
 328
 329         atl1e_irq_disable(adapter);
 330
 331         adapter->vlgrp = grp;
 332         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 333
 334         if (grp) {
 335                 /* enable VLAN tag insert/strip */
 336                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 337         } else {
 338                 /* disable VLAN tag insert/strip */
 339                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 340         }
 341
 342         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 343         atl1e_irq_enable(adapter);
 344 }
 345
 346 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 347 {
 348         struct pci_dev *pdev = adapter->pdev;
 349
 350         dev_dbg(&pdev->dev, "atl1e_restore_vlan !");
 351         atl1e_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 352 }
 353 /*
 354  * atl1e_set_mac - Change the Ethernet Address of the NIC
 355  * @netdev: network interface device structure
 356  * @p: pointer to an address structure
 357  *
 358  * Returns 0 on success, negative on failure
 359  */
 360 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 361 {
 362         struct atl1e_adapter *adapter = netdev_priv(netdev);
 363         struct sockaddr *addr = p;
 364
 365         if (!is_valid_ether_addr(addr->sa_data))
 366                 return -EADDRNOTAVAIL;
 367
 368         if (netif_running(netdev))
 369                 return -EBUSY;
 370
 371         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 372         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 373
 374         atl1e_hw_set_mac_addr(&adapter->hw);
 375
 376         return 0;
 377 }
 378
 379 /*
 380  * atl1e_change_mtu - Change the Maximum Transfer Unit
 381  * @netdev: network interface device structure
 382  * @new_mtu: new value for maximum frame size
 383  *
 384  * Returns 0 on success, negative on failure
 385  */
 386 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 387 {
 388         struct atl1e_adapter *adapter = netdev_priv(netdev);
 389         int old_mtu   = netdev->mtu;
 390         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 391
 392         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 393                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 394                 dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 395                 return -EINVAL;
 396         }
 397         /* set MTU */
 398         if (old_mtu != new_mtu && netif_running(netdev)) {
 399                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 400                         msleep(1);
 401                 netdev->mtu = new_mtu;
 402                 adapter->hw.max_frame_size = new_mtu;
 403                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 404                 atl1e_down(adapter);
 405                 atl1e_up(adapter);
 406                 clear_bit(__AT_RESETTING, &adapter->flags);
 407         }
 408         return 0;
 409 }
 410
 411 /*
 412  *  caller should hold mdio_lock
 413  */
 414 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 415 {
 416         struct atl1e_adapter *adapter = netdev_priv(netdev);
 417         u16 result;
 418
 419         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 420         return result;
 421 }
 422
 423 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 424                              int reg_num, int val)
 425 {
 426         struct atl1e_adapter *adapter = netdev_priv(netdev);
 427
 428         atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 429 }
 430
 431 /*
 432  * atl1e_mii_ioctl -
 433  * @netdev:
 434  * @ifreq:
 435  * @cmd:
 436  */
 437 static int atl1e_mii_ioctl(struct net_device *netdev,
 438                            struct ifreq *ifr, int cmd)
 439 {
 440         struct atl1e_adapter *adapter = netdev_priv(netdev);
 441         struct pci_dev *pdev = adapter->pdev;
 442         struct mii_ioctl_data *data = if_mii(ifr);
 443         unsigned long flags;
 444         int retval = 0;
 445
 446         if (!netif_running(netdev))
 447                 return -EINVAL;
 448
 449         spin_lock_irqsave(&adapter->mdio_lock, flags);
 450         switch (cmd) {
 451         case SIOCGMIIPHY:
 452                 data->phy_id = 0;
 453                 break;
 454
 455         case SIOCGMIIREG:
 456                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 457                                     &data->val_out)) {
 458                         retval = -EIO;
 459                         goto out;
 460                 }
 461                 break;
 462
 463         case SIOCSMIIREG:
 464                 if (data->reg_num & ~(0x1F)) {
 465                         retval = -EFAULT;
 466                         goto out;
 467                 }
 468
 469                 dev_dbg(&pdev->dev, "<atl1e_mii_ioctl> write %x %x",
 470                                 data->reg_num, data->val_in);
 471                 if (atl1e_write_phy_reg(&adapter->hw,
 472                                      data->reg_num, data->val_in)) {
 473                         retval = -EIO;
 474                         goto out;
 475                 }
 476                 break;
 477
 478         default:
 479                 retval = -EOPNOTSUPP;
 480                 break;
 481         }
 482 out:
 483         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 484         return retval;
 485
 486 }
 487
 488 /*
 489  * atl1e_ioctl -
 490  * @netdev:
 491  * @ifreq:
 492  * @cmd:
 493  */
 494 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 495 {
 496         switch (cmd) {
 497         case SIOCGMIIPHY:
 498         case SIOCGMIIREG:
 499         case SIOCSMIIREG:
 500                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 501         default:
 502                 return -EOPNOTSUPP;
 503         }
 504 }
 505
 506 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 507 {
 508         u16 cmd;
 509
 510         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 511         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 512         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 513         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 514
 515         /*
 516          * some motherboards BIOS(PXE/EFI) driver may set PME
 517          * while they transfer control to OS (Windows/Linux)
 518          * so we should clear this bit before NIC work normally
 519          */
 520         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 521         msleep(1);
 522 }
 523
 524 /*
 525  * atl1e_alloc_queues - Allocate memory for all rings
 526  * @adapter: board private structure to initialize
 527  *
 528  */
 529 static int __devinit atl1e_alloc_queues(struct atl1e_adapter *adapter)
 530 {
 531         return 0;
 532 }
 533
 534 /*
 535  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 536  * @adapter: board private structure to initialize
 537  *
 538  * atl1e_sw_init initializes the Adapter private data structure.
 539  * Fields are initialized based on PCI device information and
 540  * OS network device settings (MTU size).
 541  */
 542 static int __devinit atl1e_sw_init(struct atl1e_adapter *adapter)
 543 {
 544         struct atl1e_hw *hw   = &adapter->hw;
 545         struct pci_dev  *pdev = adapter->pdev;
 546         u32 phy_status_data = 0;
 547
 548         adapter->wol = 0;
 549         adapter->link_speed = SPEED_0;   /* hardware init */
 550         adapter->link_duplex = FULL_DUPLEX;
 551         adapter->num_rx_queues = 1;
 552
 553         /* PCI config space info */
 554         hw->vendor_id = pdev->vendor;
 555         hw->device_id = pdev->device;
 556         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 557         hw->subsystem_id = pdev->subsystem_device;
 558
 559         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 560         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 561
 562         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 563         /* nic type */
 564         if (hw->revision_id >= 0xF0) {
 565                 hw->nic_type = athr_l2e_revB;
 566         } else {
 567                 if (phy_status_data & PHY_STATUS_100M)
 568                         hw->nic_type = athr_l1e;
 569                 else
 570                         hw->nic_type = athr_l2e_revA;
 571         }
 572
 573         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 574
 575         if (phy_status_data & PHY_STATUS_EMI_CA)
 576                 hw->emi_ca = true;
 577         else
 578                 hw->emi_ca = false;
 579
 580         hw->phy_configured = false;
 581         hw->preamble_len = 7;
 582         hw->max_frame_size = adapter->netdev->mtu;
 583         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 584                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 585
 586         hw->rrs_type = atl1e_rrs_disable;
 587         hw->indirect_tab = 0;
 588         hw->base_cpu = 0;
 589
 590         /* need confirm */
 591
 592         hw->ict = 50000;                 /* 100ms */
 593         hw->smb_timer = 200000;          /* 200ms  */
 594         hw->tpd_burst = 5;
 595         hw->rrd_thresh = 1;
 596         hw->tpd_thresh = adapter->tx_ring.count / 2;
 597         hw->rx_count_down = 4;  /* 2us resolution */
 598         hw->tx_count_down = hw->imt * 4 / 3;
 599         hw->dmar_block = atl1e_dma_req_1024;
 600         hw->dmaw_block = atl1e_dma_req_1024;
 601         hw->dmar_dly_cnt = 15;
 602         hw->dmaw_dly_cnt = 4;
 603
 604         if (atl1e_alloc_queues(adapter)) {
 605                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 606                 return -ENOMEM;
 607         }
 608
 609         atomic_set(&adapter->irq_sem, 1);
 610         spin_lock_init(&adapter->mdio_lock);
 611         spin_lock_init(&adapter->tx_lock);
 612
 613         set_bit(__AT_DOWN, &adapter->flags);
 614
 615         return 0;
 616 }
 617
 618 /*
 619  * atl1e_clean_tx_ring - Free Tx-skb
 620  * @adapter: board private structure
 621  */
 622 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 623 {
 624         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
 625                                 &adapter->tx_ring;
 626         struct atl1e_tx_buffer *tx_buffer = NULL;
 627         struct pci_dev *pdev = adapter->pdev;
 628         u16 index, ring_count;
 629
 630         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 631                 return;
 632
 633         ring_count = tx_ring->count;
 634         /* first unmmap dma */
 635         for (index = 0; index < ring_count; index++) {
 636                 tx_buffer = &tx_ring->tx_buffer[index];
 637                 if (tx_buffer->dma) {
 638                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 639                                 pci_unmap_single(pdev, tx_buffer->dma,
 640                                         tx_buffer->length, PCI_DMA_TODEVICE);
 641                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 642                                 pci_unmap_page(pdev, tx_buffer->dma,
 643                                         tx_buffer->length, PCI_DMA_TODEVICE);
 644                         tx_buffer->dma = 0;
 645                 }
 646         }
 647         /* second free skb */
 648         for (index = 0; index < ring_count; index++) {
 649                 tx_buffer = &tx_ring->tx_buffer[index];
 650                 if (tx_buffer->skb) {
 651                         dev_kfree_skb_any(tx_buffer->skb);
 652                         tx_buffer->skb = NULL;
 653                 }
 654         }
 655         /* Zero out Tx-buffers */
 656         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 657                                 ring_count);
 658         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 659                                 ring_count);
 660 }
 661
 662 /*
 663  * atl1e_clean_rx_ring - Free rx-reservation skbs
 664  * @adapter: board private structure
 665  */
 666 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 667 {
 668         struct atl1e_rx_ring *rx_ring =
 669                 (struct atl1e_rx_ring *)&adapter->rx_ring;
 670         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 671         u16 i, j;
 672
 673
 674         if (adapter->ring_vir_addr == NULL)
 675                 return;
 676         /* Zero out the descriptor ring */
 677         for (i = 0; i < adapter->num_rx_queues; i++) {
 678                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 679                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 680                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 681                                                 rx_ring->real_page_size);
 682                         }
 683                 }
 684         }
 685 }
 686
 687 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 688 {
 689         *ring_size = ((u32)(adapter->tx_ring.count *
 690                      sizeof(struct atl1e_tpd_desc) + 7
 691                         /* tx ring, qword align */
 692                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 693                         adapter->num_rx_queues + 31
 694                         /* rx ring,  32 bytes align */
 695                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 696                         sizeof(u32) + 3));
 697                         /* tx, rx cmd, dword align   */
 698 }
 699
 700 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 701 {
 702         struct atl1e_tx_ring *tx_ring = NULL;
 703         struct atl1e_rx_ring *rx_ring = NULL;
 704
 705         tx_ring = &adapter->tx_ring;
 706         rx_ring = &adapter->rx_ring;
 707
 708         rx_ring->real_page_size = adapter->rx_ring.page_size
 709                                  + adapter->hw.max_frame_size
 710                                  + ETH_HLEN + VLAN_HLEN
 711                                  + ETH_FCS_LEN;
 712         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 713         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 714
 715         adapter->ring_vir_addr = NULL;
 716         adapter->rx_ring.desc = NULL;
 717         rwlock_init(&adapter->tx_ring.tx_lock);
 718
 719         return;
 720 }
 721
 722 /*
 723  * Read / Write Ptr Initialize:
 724  */
 725 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 726 {
 727         struct atl1e_tx_ring *tx_ring = NULL;
 728         struct atl1e_rx_ring *rx_ring = NULL;
 729         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 730         int i, j;
 731
 732         tx_ring = &adapter->tx_ring;
 733         rx_ring = &adapter->rx_ring;
 734         rx_page_desc = rx_ring->rx_page_desc;
 735
 736         tx_ring->next_to_use = 0;
 737         atomic_set(&tx_ring->next_to_clean, 0);
 738
 739         for (i = 0; i < adapter->num_rx_queues; i++) {
 740                 rx_page_desc[i].rx_using  = 0;
 741                 rx_page_desc[i].rx_nxseq = 0;
 742                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 743                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 744                         rx_page_desc[i].rx_page[j].read_offset = 0;
 745                 }
 746         }
 747 }
 748
 749 /*
 750  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 751  * @adapter: board private structure
 752  *
 753  * Free all transmit software resources
 754  */
 755 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 756 {
 757         struct pci_dev *pdev = adapter->pdev;
 758
 759         atl1e_clean_tx_ring(adapter);
 760         atl1e_clean_rx_ring(adapter);
 761
 762         if (adapter->ring_vir_addr) {
 763                 pci_free_consistent(pdev, adapter->ring_size,
 764                                 adapter->ring_vir_addr, adapter->ring_dma);
 765                 adapter->ring_vir_addr = NULL;
 766         }
 767
 768         if (adapter->tx_ring.tx_buffer) {
 769                 kfree(adapter->tx_ring.tx_buffer);
 770                 adapter->tx_ring.tx_buffer = NULL;
 771         }
 772 }
 773
 774 /*
 775  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 776  * @adapter: board private structure
 777  *
 778  * Return 0 on success, negative on failure
 779  */
 780 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 781 {
 782         struct pci_dev *pdev = adapter->pdev;
 783         struct atl1e_tx_ring *tx_ring;
 784         struct atl1e_rx_ring *rx_ring;
 785         struct atl1e_rx_page_desc  *rx_page_desc;
 786         int size, i, j;
 787         u32 offset = 0;
 788         int err = 0;
 789
 790         if (adapter->ring_vir_addr != NULL)
 791                 return 0; /* alloced already */
 792
 793         tx_ring = &adapter->tx_ring;
 794         rx_ring = &adapter->rx_ring;
 795
 796         /* real ring DMA buffer */
 797
 798         size = adapter->ring_size;
 799         adapter->ring_vir_addr = pci_alloc_consistent(pdev,
 800                         adapter->ring_size, &adapter->ring_dma);
 801
 802         if (adapter->ring_vir_addr == NULL) {
 803                 dev_err(&pdev->dev, "pci_alloc_consistent failed, "
 804                                     "size = D%d", size);
 805                 return -ENOMEM;
 806         }
 807
 808         memset(adapter->ring_vir_addr, 0, adapter->ring_size);
 809
 810         rx_page_desc = rx_ring->rx_page_desc;
 811
 812         /* Init TPD Ring */
 813         tx_ring->dma = roundup(adapter->ring_dma, 8);
 814         offset = tx_ring->dma - adapter->ring_dma;
 815         tx_ring->desc = (struct atl1e_tpd_desc *)
 816                         (adapter->ring_vir_addr + offset);
 817         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 818         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 819         if (tx_ring->tx_buffer == NULL) {
 820                 dev_err(&pdev->dev, "kzalloc failed , size = D%d", size);
 821                 err = -ENOMEM;
 822                 goto failed;
 823         }
 824
 825         /* Init RXF-Pages */
 826         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 827         offset = roundup(offset, 32);
 828
 829         for (i = 0; i < adapter->num_rx_queues; i++) {
 830                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 831                         rx_page_desc[i].rx_page[j].dma =
 832                                 adapter->ring_dma + offset;
 833                         rx_page_desc[i].rx_page[j].addr =
 834                                 adapter->ring_vir_addr + offset;
 835                         offset += rx_ring->real_page_size;
 836                 }
 837         }
 838
 839         /* Init CMB dma address */
 840         tx_ring->cmb_dma = adapter->ring_dma + offset;
 841         tx_ring->cmb     = (u32 *)(adapter->ring_vir_addr + offset);
 842         offset += sizeof(u32);
 843
 844         for (i = 0; i < adapter->num_rx_queues; i++) {
 845                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 846                         rx_page_desc[i].rx_page[j].write_offset_dma =
 847                                 adapter->ring_dma + offset;
 848                         rx_page_desc[i].rx_page[j].write_offset_addr =
 849                                 adapter->ring_vir_addr + offset;
 850                         offset += sizeof(u32);
 851                 }
 852         }
 853
 854         if (unlikely(offset > adapter->ring_size)) {
 855                 dev_err(&pdev->dev, "offset(%d) > ring size(%d) !!\n",
 856                                 offset, adapter->ring_size);
 857                 err = -1;
 858                 goto failed;
 859         }
 860
 861         return 0;
 862 failed:
 863         if (adapter->ring_vir_addr != NULL) {
 864                 pci_free_consistent(pdev, adapter->ring_size,
 865                                 adapter->ring_vir_addr, adapter->ring_dma);
 866                 adapter->ring_vir_addr = NULL;
 867         }
 868         return err;
 869 }
 870
 871 static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter)
 872 {
 873
 874         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 875         struct atl1e_rx_ring *rx_ring =
 876                         (struct atl1e_rx_ring *)&adapter->rx_ring;
 877         struct atl1e_tx_ring *tx_ring =
 878                         (struct atl1e_tx_ring *)&adapter->tx_ring;
 879         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 880         int i, j;
 881
 882         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 883                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 884         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 885                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 886         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 887         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 888                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 889
 890         rx_page_desc = rx_ring->rx_page_desc;
 891         /* RXF Page Physical address / Page Length */
 892         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 893                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 894                                  (u32)((adapter->ring_dma &
 895                                  AT_DMA_HI_ADDR_MASK) >> 32));
 896                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 897                         u32 page_phy_addr;
 898                         u32 offset_phy_addr;
 899
 900                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 901                         offset_phy_addr =
 902                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 903
 904                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 905                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 906                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 907                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 908                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 909                 }
 910         }
 911         /* Page Length */
 912         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 913         /* Load all of base address above */
 914         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 915
 916         return;
 917 }
 918
 919 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 920 {
 921         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 922         u32 dev_ctrl_data = 0;
 923         u32 max_pay_load = 0;
 924         u32 jumbo_thresh = 0;
 925         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 926
 927         /* configure TXQ param */
 928         if (hw->nic_type != athr_l2e_revB) {
 929                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 930                 if (hw->max_frame_size <= 1500) {
 931                         jumbo_thresh = hw->max_frame_size + extra_size;
 932                 } else if (hw->max_frame_size < 6*1024) {
 933                         jumbo_thresh =
 934                                 (hw->max_frame_size + extra_size) * 2 / 3;
 935                 } else {
 936                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 937                 }
 938                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 939         }
 940
 941         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 942
 943         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 944                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 945
 946         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
 947
 948         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 949                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 950         hw->dmar_block = min(max_pay_load, hw->dmar_block);
 951
 952         if (hw->nic_type != athr_l2e_revB)
 953                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 954                               atl1e_pay_load_size[hw->dmar_block]);
 955         /* enable TXQ */
 956         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 957                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 958                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 959                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 960         return;
 961 }
 962
 963 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 964 {
 965         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 966         u32 rxf_len  = 0;
 967         u32 rxf_low  = 0;
 968         u32 rxf_high = 0;
 969         u32 rxf_thresh_data = 0;
 970         u32 rxq_ctrl_data = 0;
 971
 972         if (hw->nic_type != athr_l2e_revB) {
 973                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 974                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 975                               RXQ_JMBOSZ_TH_SHIFT |
 976                               (1 & RXQ_JMBO_LKAH_MASK) <<
 977                               RXQ_JMBO_LKAH_SHIFT));
 978
 979                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 980                 rxf_high = rxf_len * 4 / 5;
 981                 rxf_low  = rxf_len / 5;
 982                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 983                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 984                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 985                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 986
 987                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 988         }
 989
 990         /* RRS */
 991         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
 992         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
 993
 994         if (hw->rrs_type & atl1e_rrs_ipv4)
 995                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
 996
 997         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
 998                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
 999
1000         if (hw->rrs_type & atl1e_rrs_ipv6)
1001                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1002
1003         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1004                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1005
1006         if (hw->rrs_type != atl1e_rrs_disable)
1007                 rxq_ctrl_data |=
1008                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1009
1010         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1011                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1012
1013         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1014         return;
1015 }
1016
1017 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1018 {
1019         struct atl1e_hw *hw = &adapter->hw;
1020         u32 dma_ctrl_data = 0;
1021
1022         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1023         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1024                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1025         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1026                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1027         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1028         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1029                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1030         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1031                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1032
1033         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1034         return;
1035 }
1036
1037 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1038 {
1039         u32 value;
1040         struct atl1e_hw *hw = &adapter->hw;
1041         struct net_device *netdev = adapter->netdev;
1042
1043         /* Config MAC CTRL Register */
1044         value = MAC_CTRL_TX_EN |
1045                 MAC_CTRL_RX_EN ;
1046
1047         if (FULL_DUPLEX == adapter->link_duplex)
1048                 value |= MAC_CTRL_DUPLX;
1049
1050         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1051                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1052                           MAC_CTRL_SPEED_SHIFT);
1053         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1054
1055         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1056         value |= (((u32)adapter->hw.preamble_len &
1057                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1058
1059         if (adapter->vlgrp)
1060                 value |= MAC_CTRL_RMV_VLAN;
1061
1062         value |= MAC_CTRL_BC_EN;
1063         if (netdev->flags & IFF_PROMISC)
1064                 value |= MAC_CTRL_PROMIS_EN;
1065         if (netdev->flags & IFF_ALLMULTI)
1066                 value |= MAC_CTRL_MC_ALL_EN;
1067
1068         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1069 }
1070
1071 /*
1072  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1073  * @adapter: board private structure
1074  *
1075  * Configure the Tx /Rx unit of the MAC after a reset.
1076  */
1077 static int atl1e_configure(struct atl1e_adapter *adapter)
1078 {
1079         struct atl1e_hw *hw = &adapter->hw;
1080         struct pci_dev *pdev = adapter->pdev;
1081
1082         u32 intr_status_data = 0;
1083
1084         /* clear interrupt status */
1085         AT_WRITE_REG(hw, REG_ISR, ~0);
1086
1087         /* 1. set MAC Address */
1088         atl1e_hw_set_mac_addr(hw);
1089
1090         /* 2. Init the Multicast HASH table done by set_muti */
1091
1092         /* 3. Clear any WOL status */
1093         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1094
1095         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1096          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1097          *    High 32bits memory */
1098         atl1e_configure_des_ring(adapter);
1099
1100         /* 5. set Interrupt Moderator Timer */
1101         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1102         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1103         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1104                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1105
1106         /* 6. rx/tx threshold to trig interrupt */
1107         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1108         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1109         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1110         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1111
1112         /* 7. set Interrupt Clear Timer */
1113         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1114
1115         /* 8. set MTU */
1116         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1117                         VLAN_HLEN + ETH_FCS_LEN);
1118
1119         /* 9. config TXQ early tx threshold */
1120         atl1e_configure_tx(adapter);
1121
1122         /* 10. config RXQ */
1123         atl1e_configure_rx(adapter);
1124
1125         /* 11. config  DMA Engine */
1126         atl1e_configure_dma(adapter);
1127
1128         /* 12. smb timer to trig interrupt */
1129         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1130
1131         intr_status_data = AT_READ_REG(hw, REG_ISR);
1132         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1133                 dev_err(&pdev->dev, "atl1e_configure failed,"
1134                                 "PCIE phy link down\n");
1135                 return -1;
1136         }
1137
1138         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1139         return 0;
1140 }
1141
1142 /*
1143  * atl1e_get_stats - Get System Network Statistics
1144  * @netdev: network interface device structure
1145  *
1146  * Returns the address of the device statistics structure.
1147  * The statistics are actually updated from the timer callback.
1148  */
1149 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1150 {
1151         struct atl1e_adapter *adapter = netdev_priv(netdev);
1152         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1153         struct net_device_stats *net_stats = &netdev->stats;
1154
1155         net_stats->rx_packets = hw_stats->rx_ok;
1156         net_stats->tx_packets = hw_stats->tx_ok;
1157         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1158         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1159         net_stats->multicast  = hw_stats->rx_mcast;
1160         net_stats->collisions = hw_stats->tx_1_col +
1161                                 hw_stats->tx_2_col * 2 +
1162                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1163
1164         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1165                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1166                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1167         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1168         net_stats->rx_length_errors = hw_stats->rx_len_err;
1169         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1170         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1171         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1172
1173         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1174
1175         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1176                                hw_stats->tx_underrun + hw_stats->tx_trunc;
1177         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1178         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1179         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1180
1181         return net_stats;
1182 }
1183
1184 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1185 {
1186         u16 hw_reg_addr = 0;
1187         unsigned long *stats_item = NULL;
1188
1189         /* update rx status */
1190         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1191         stats_item  = &adapter->hw_stats.rx_ok;
1192         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1193                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1194                 stats_item++;
1195                 hw_reg_addr += 4;
1196         }
1197         /* update tx status */
1198         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1199         stats_item  = &adapter->hw_stats.tx_ok;
1200         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1201                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1202                 stats_item++;
1203                 hw_reg_addr += 4;
1204         }
1205 }
1206
1207 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1208 {
1209         u16 phy_data;
1210
1211         spin_lock(&adapter->mdio_lock);
1212         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1213         spin_unlock(&adapter->mdio_lock);
1214 }
1215
1216 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1217 {
1218         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
1219                                         &adapter->tx_ring;
1220         struct atl1e_tx_buffer *tx_buffer = NULL;
1221         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1222         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1223
1224         while (next_to_clean != hw_next_to_clean) {
1225                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1226                 if (tx_buffer->dma) {
1227                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1228                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1229                                         tx_buffer->length, PCI_DMA_TODEVICE);
1230                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1231                                 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1232                                         tx_buffer->length, PCI_DMA_TODEVICE);
1233                         tx_buffer->dma = 0;
1234                 }
1235
1236                 if (tx_buffer->skb) {
1237                         dev_kfree_skb_irq(tx_buffer->skb);
1238                         tx_buffer->skb = NULL;
1239                 }
1240
1241                 if (++next_to_clean == tx_ring->count)
1242                         next_to_clean = 0;
1243         }
1244
1245         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1246
1247         if (netif_queue_stopped(adapter->netdev) &&
1248                         netif_carrier_ok(adapter->netdev)) {
1249                 netif_wake_queue(adapter->netdev);
1250         }
1251
1252         return true;
1253 }
1254
1255 /*
1256  * atl1e_intr - Interrupt Handler
1257  * @irq: interrupt number
1258  * @data: pointer to a network interface device structure
1259  * @pt_regs: CPU registers structure
1260  */
1261 static irqreturn_t atl1e_intr(int irq, void *data)
1262 {
1263         struct net_device *netdev  = data;
1264         struct atl1e_adapter *adapter = netdev_priv(netdev);
1265         struct pci_dev *pdev = adapter->pdev;
1266         struct atl1e_hw *hw = &adapter->hw;
1267         int max_ints = AT_MAX_INT_WORK;
1268         int handled = IRQ_NONE;
1269         u32 status;
1270
1271         do {
1272                 status = AT_READ_REG(hw, REG_ISR);
1273                 if ((status & IMR_NORMAL_MASK) == 0 ||
1274                                 (status & ISR_DIS_INT) != 0) {
1275                         if (max_ints != AT_MAX_INT_WORK)
1276                                 handled = IRQ_HANDLED;
1277                         break;
1278                 }
1279                 /* link event */
1280                 if (status & ISR_GPHY)
1281                         atl1e_clear_phy_int(adapter);
1282                 /* Ack ISR */
1283                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1284
1285                 handled = IRQ_HANDLED;
1286                 /* check if PCIE PHY Link down */
1287                 if (status & ISR_PHY_LINKDOWN) {
1288                         dev_err(&pdev->dev,
1289                                 "pcie phy linkdown %x\n", status);
1290                         if (netif_running(adapter->netdev)) {
1291                                 /* reset MAC */
1292                                 atl1e_irq_reset(adapter);
1293                                 schedule_work(&adapter->reset_task);
1294                                 break;
1295                         }
1296                 }
1297
1298                 /* check if DMA read/write error */
1299                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1300                         dev_err(&pdev->dev,
1301                                 "PCIE DMA RW error (status = 0x%x)\n",
1302                                 status);
1303                         atl1e_irq_reset(adapter);
1304                         schedule_work(&adapter->reset_task);
1305                         break;
1306                 }
1307
1308                 if (status & ISR_SMB)
1309                         atl1e_update_hw_stats(adapter);
1310
1311                 /* link event */
1312                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1313                         netdev->stats.tx_carrier_errors++;
1314                         atl1e_link_chg_event(adapter);
1315                         break;
1316                 }
1317
1318                 /* transmit event */
1319                 if (status & ISR_TX_EVENT)
1320                         atl1e_clean_tx_irq(adapter);
1321
1322                 if (status & ISR_RX_EVENT) {
1323                         /*
1324                          * disable rx interrupts, without
1325                          * the synchronize_irq bit
1326                          */
1327                         AT_WRITE_REG(hw, REG_IMR,
1328                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1329                         AT_WRITE_FLUSH(hw);
1330                         if (likely(napi_schedule_prep(
1331                                    &adapter->napi)))
1332                                 __napi_schedule(&adapter->napi);
1333                 }
1334         } while (--max_ints > 0);
1335         /* re-enable Interrupt*/
1336         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1337
1338         return handled;
1339 }
1340
1341 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1342                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1343 {
1344         u8 *packet = (u8 *)(prrs + 1);
1345         struct iphdr *iph;
1346         u16 head_len = ETH_HLEN;
1347         u16 pkt_flags;
1348         u16 err_flags;
1349
1350         skb->ip_summed = CHECKSUM_NONE;
1351         pkt_flags = prrs->pkt_flag;
1352         err_flags = prrs->err_flag;
1353         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1354                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1355                 if (pkt_flags & RRS_IS_IPV4) {
1356                         if (pkt_flags & RRS_IS_802_3)
1357                                 head_len += 8;
1358                         iph = (struct iphdr *) (packet + head_len);
1359                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1360                                 goto hw_xsum;
1361                 }
1362                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1363                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1364                         return;
1365                 }
1366         }
1367
1368 hw_xsum :
1369         return;
1370 }
1371
1372 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1373                                                u8 que)
1374 {
1375         struct atl1e_rx_page_desc *rx_page_desc =
1376                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1377         u8 rx_using = rx_page_desc[que].rx_using;
1378
1379         return (struct atl1e_rx_page *)&(rx_page_desc[que].rx_page[rx_using]);
1380 }
1381
1382 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1383                    int *work_done, int work_to_do)
1384 {
1385         struct pci_dev *pdev = adapter->pdev;
1386         struct net_device *netdev  = adapter->netdev;
1387         struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *)
1388                                          &adapter->rx_ring;
1389         struct atl1e_rx_page_desc *rx_page_desc =
1390                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1391         struct sk_buff *skb = NULL;
1392         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1393         u32 packet_size, write_offset;
1394         struct atl1e_recv_ret_status *prrs;
1395
1396         write_offset = *(rx_page->write_offset_addr);
1397         if (likely(rx_page->read_offset < write_offset)) {
1398                 do {
1399                         if (*work_done >= work_to_do)
1400                                 break;
1401                         (*work_done)++;
1402                         /* get new packet's  rrs */
1403                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1404                                                  rx_page->read_offset);
1405                         /* check sequence number */
1406                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1407                                 dev_err(&pdev->dev,
1408                                         "rx sequence number"
1409                                         " error (rx=%d) (expect=%d)\n",
1410                                         prrs->seq_num,
1411                                         rx_page_desc[que].rx_nxseq);
1412                                 rx_page_desc[que].rx_nxseq++;
1413                                 /* just for debug use */
1414                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1415                                              (((u32)prrs->seq_num) << 16) |
1416                                              rx_page_desc[que].rx_nxseq);
1417                                 goto fatal_err;
1418                         }
1419                         rx_page_desc[que].rx_nxseq++;
1420
1421                         /* error packet */
1422                         if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
1423                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1424                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1425                                         RRS_ERR_TRUNC)) {
1426                                 /* hardware error, discard this packet*/
1427                                         dev_err(&pdev->dev,
1428                                                 "rx packet desc error %x\n",
1429                                                 *((u32 *)prrs + 1));
1430                                         goto skip_pkt;
1431                                 }
1432                         }
1433
1434                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1435                                         RRS_PKT_SIZE_MASK) - 4; /* CRC */
1436                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1437                         if (skb == NULL) {
1438                                 dev_warn(&pdev->dev, "%s: Memory squeeze,"
1439                                         "deferring packet.\n", netdev->name);
1440                                 goto skip_pkt;
1441                         }
1442                         skb->dev = netdev;
1443                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1444                         skb_put(skb, packet_size);
1445                         skb->protocol = eth_type_trans(skb, netdev);
1446                         atl1e_rx_checksum(adapter, skb, prrs);
1447
1448                         if (unlikely(adapter->vlgrp &&
1449                                 (prrs->pkt_flag & RRS_IS_VLAN_TAG))) {
1450                                 u16 vlan_tag = (prrs->vtag >> 4) |
1451                                                ((prrs->vtag & 7) << 13) |
1452                                                ((prrs->vtag & 8) << 9);
1453                                 dev_dbg(&pdev->dev,
1454                                         "RXD VLAN TAG<RRD>=0x%04x\n",
1455                                         prrs->vtag);
1456                                 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
1457                                                          vlan_tag);
1458                         } else {
1459                                 netif_receive_skb(skb);
1460                         }
1461
1462 skip_pkt:
1463         /* skip current packet whether it's ok or not. */
1464                         rx_page->read_offset +=
1465                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1466                                 RRS_PKT_SIZE_MASK) +
1467                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1468                                                 0xFFFFFFE0);
1469
1470                         if (rx_page->read_offset >= rx_ring->page_size) {
1471                                 /* mark this page clean */
1472                                 u16 reg_addr;
1473                                 u8  rx_using;
1474
1475                                 rx_page->read_offset =
1476                                         *(rx_page->write_offset_addr) = 0;
1477                                 rx_using = rx_page_desc[que].rx_using;
1478                                 reg_addr =
1479                                         atl1e_rx_page_vld_regs[que][rx_using];
1480                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1481                                 rx_page_desc[que].rx_using ^= 1;
1482                                 rx_page = atl1e_get_rx_page(adapter, que);
1483                         }
1484                         write_offset = *(rx_page->write_offset_addr);
1485                 } while (rx_page->read_offset < write_offset);
1486         }
1487
1488         return;
1489
1490 fatal_err:
1491         if (!test_bit(__AT_DOWN, &adapter->flags))
1492                 schedule_work(&adapter->reset_task);
1493 }
1494
1495 /*
1496  * atl1e_clean - NAPI Rx polling callback
1497  * @adapter: board private structure
1498  */
1499 static int atl1e_clean(struct napi_struct *napi, int budget)
1500 {
1501         struct atl1e_adapter *adapter =
1502                         container_of(napi, struct atl1e_adapter, napi);
1503         struct pci_dev    *pdev    = adapter->pdev;
1504         u32 imr_data;
1505         int work_done = 0;
1506
1507         /* Keep link state information with original netdev */
1508         if (!netif_carrier_ok(adapter->netdev))
1509                 goto quit_polling;
1510
1511         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1512
1513         /* If no Tx and not enough Rx work done, exit the polling mode */
1514         if (work_done < budget) {
1515 quit_polling:
1516                 napi_complete(napi);
1517                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1518                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1519                 /* test debug */
1520                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1521                         atomic_dec(&adapter->irq_sem);
1522                         dev_err(&pdev->dev,
1523                                 "atl1e_clean is called when AT_DOWN\n");
1524                 }
1525                 /* reenable RX intr */
1526                 /*atl1e_irq_enable(adapter); */
1527
1528         }
1529         return work_done;
1530 }
1531
1532 #ifdef CONFIG_NET_POLL_CONTROLLER
1533
1534 /*
1535  * Polling 'interrupt' - used by things like netconsole to send skbs
1536  * without having to re-enable interrupts. It's not called while
1537  * the interrupt routine is executing.
1538  */
1539 static void atl1e_netpoll(struct net_device *netdev)
1540 {
1541         struct atl1e_adapter *adapter = netdev_priv(netdev);
1542
1543         disable_irq(adapter->pdev->irq);
1544         atl1e_intr(adapter->pdev->irq, netdev);
1545         enable_irq(adapter->pdev->irq);
1546 }
1547 #endif
1548
1549 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1550 {
1551         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1552         u16 next_to_use = 0;
1553         u16 next_to_clean = 0;
1554
1555         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1556         next_to_use   = tx_ring->next_to_use;
1557
1558         return (u16)(next_to_clean > next_to_use) ?
1559                 (next_to_clean - next_to_use - 1) :
1560                 (tx_ring->count + next_to_clean - next_to_use - 1);
1561 }
1562
1563 /*
1564  * get next usable tpd
1565  * Note: should call atl1e_tdp_avail to make sure
1566  * there is enough tpd to use
1567  */
1568 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1569 {
1570         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1571         u16 next_to_use = 0;
1572
1573         next_to_use = tx_ring->next_to_use;
1574         if (++tx_ring->next_to_use == tx_ring->count)
1575                 tx_ring->next_to_use = 0;
1576
1577         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1578         return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use];
1579 }
1580
1581 static struct atl1e_tx_buffer *
1582 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1583 {
1584         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1585
1586         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1587 }
1588
1589 /* Calculate the transmit packet descript needed*/
1590 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1591 {
1592         int i = 0;
1593         u16 tpd_req = 1;
1594         u16 fg_size = 0;
1595         u16 proto_hdr_len = 0;
1596
1597         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1598                 fg_size = skb_shinfo(skb)->frags[i].size;
1599                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1600         }
1601
1602         if (skb_is_gso(skb)) {
1603                 if (skb->protocol == htons(ETH_P_IP) ||
1604                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1605                         proto_hdr_len = skb_transport_offset(skb) +
1606                                         tcp_hdrlen(skb);
1607                         if (proto_hdr_len < skb_headlen(skb)) {
1608                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1609                                            MAX_TX_BUF_LEN - 1) >>
1610                                            MAX_TX_BUF_SHIFT);
1611                         }
1612                 }
1613
1614         }
1615         return tpd_req;
1616 }
1617
1618 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1619                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1620 {
1621         struct pci_dev *pdev = adapter->pdev;
1622         u8 hdr_len;
1623         u32 real_len;
1624         unsigned short offload_type;
1625         int err;
1626
1627         if (skb_is_gso(skb)) {
1628                 if (skb_header_cloned(skb)) {
1629                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1630                         if (unlikely(err))
1631                                 return -1;
1632                 }
1633                 offload_type = skb_shinfo(skb)->gso_type;
1634
1635                 if (offload_type & SKB_GSO_TCPV4) {
1636                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1637                                         + ntohs(ip_hdr(skb)->tot_len));
1638
1639                         if (real_len < skb->len)
1640                                 pskb_trim(skb, real_len);
1641
1642                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1643                         if (unlikely(skb->len == hdr_len)) {
1644                                 /* only xsum need */
1645                                 dev_warn(&pdev->dev,
1646                                       "IPV4 tso with zero data??\n");
1647                                 goto check_sum;
1648                         } else {
1649                                 ip_hdr(skb)->check = 0;
1650                                 ip_hdr(skb)->tot_len = 0;
1651                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1652                                                         ip_hdr(skb)->saddr,
1653                                                         ip_hdr(skb)->daddr,
1654                                                         0, IPPROTO_TCP, 0);
1655                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1656                                         TDP_V4_IPHL_MASK) <<
1657                                         TPD_V4_IPHL_SHIFT;
1658                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1659                                         TPD_TCPHDRLEN_MASK) <<
1660                                         TPD_TCPHDRLEN_SHIFT;
1661                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1662                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1663                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1664                         }
1665                         return 0;
1666                 }
1667
1668                 if (offload_type & SKB_GSO_TCPV6) {
1669                         real_len = (((unsigned char *)ipv6_hdr(skb) - skb->data)
1670                                         + ntohs(ipv6_hdr(skb)->payload_len));
1671                         if (real_len < skb->len)
1672                                 pskb_trim(skb, real_len);
1673
1674                         /* check payload == 0 byte ? */
1675                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1676                         if (unlikely(skb->len == hdr_len)) {
1677                                 /* only xsum need */
1678                                 dev_warn(&pdev->dev,
1679                                         "IPV6 tso with zero data??\n");
1680                                 goto check_sum;
1681                         } else {
1682                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
1683                                                 &ipv6_hdr(skb)->saddr,
1684                                                 &ipv6_hdr(skb)->daddr,
1685                                                 0, IPPROTO_TCP, 0);
1686                                 tpd->word3 |= 1 << TPD_IP_VERSION_SHIFT;
1687                                 hdr_len >>= 1;
1688                                 tpd->word3 |= (hdr_len & TPD_V6_IPHLLO_MASK) <<
1689                                         TPD_V6_IPHLLO_SHIFT;
1690                                 tpd->word3 |= ((hdr_len >> 3) &
1691                                         TPD_V6_IPHLHI_MASK) <<
1692                                         TPD_V6_IPHLHI_SHIFT;
1693                                 tpd->word3 |= (tcp_hdrlen(skb) >> 2 &
1694                                         TPD_TCPHDRLEN_MASK) <<
1695                                         TPD_TCPHDRLEN_SHIFT;
1696                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1697                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1698                                         tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1699                         }
1700                 }
1701                 return 0;
1702         }
1703
1704 check_sum:
1705         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1706                 u8 css, cso;
1707
1708                 cso = skb_transport_offset(skb);
1709                 if (unlikely(cso & 0x1)) {
1710                         dev_err(&adapter->pdev->dev,
1711                            "pay load offset should not ant event number\n");
1712                         return -1;
1713                 } else {
1714                         css = cso + skb->csum_offset;
1715                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1716                                         TPD_PLOADOFFSET_SHIFT;
1717                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1718                                         TPD_CCSUMOFFSET_SHIFT;
1719                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1720                 }
1721         }
1722
1723         return 0;
1724 }
1725
1726 static void atl1e_tx_map(struct atl1e_adapter *adapter,
1727                       struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1728 {
1729         struct atl1e_tpd_desc *use_tpd = NULL;
1730         struct atl1e_tx_buffer *tx_buffer = NULL;
1731         u16 buf_len = skb->len - skb->data_len;
1732         u16 map_len = 0;
1733         u16 mapped_len = 0;
1734         u16 hdr_len = 0;
1735         u16 nr_frags;
1736         u16 f;
1737         int segment;
1738
1739         nr_frags = skb_shinfo(skb)->nr_frags;
1740         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1741         if (segment) {
1742                 /* TSO */
1743                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1744                 use_tpd = tpd;
1745
1746                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1747                 tx_buffer->length = map_len;
1748                 tx_buffer->dma = pci_map_single(adapter->pdev,
1749                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1750                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1751                 mapped_len += map_len;
1752                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1753                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1754                         ((cpu_to_le32(tx_buffer->length) &
1755                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1756         }
1757
1758         while (mapped_len < buf_len) {
1759                 /* mapped_len == 0, means we should use the first tpd,
1760                    which is given by caller  */
1761                 if (mapped_len == 0) {
1762                         use_tpd = tpd;
1763                 } else {
1764                         use_tpd = atl1e_get_tpd(adapter);
1765                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1766                 }
1767                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1768                 tx_buffer->skb = NULL;
1769
1770                 tx_buffer->length = map_len =
1771                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1772                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1773                 tx_buffer->dma =
1774                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1775                                         map_len, PCI_DMA_TODEVICE);
1776                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1777                 mapped_len  += map_len;
1778                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1779                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1780                         ((cpu_to_le32(tx_buffer->length) &
1781                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1782         }
1783
1784         for (f = 0; f < nr_frags; f++) {
1785                 struct skb_frag_struct *frag;
1786                 u16 i;
1787                 u16 seg_num;
1788
1789                 frag = &skb_shinfo(skb)->frags[f];
1790                 buf_len = frag->size;
1791
1792                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1793                 for (i = 0; i < seg_num; i++) {
1794                         use_tpd = atl1e_get_tpd(adapter);
1795                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1796
1797                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1798                         BUG_ON(tx_buffer->skb);
1799
1800                         tx_buffer->skb = NULL;
1801                         tx_buffer->length =
1802                                 (buf_len > MAX_TX_BUF_LEN) ?
1803                                 MAX_TX_BUF_LEN : buf_len;
1804                         buf_len -= tx_buffer->length;
1805
1806                         tx_buffer->dma =
1807                                 pci_map_page(adapter->pdev, frag->page,
1808                                                 frag->page_offset +
1809                                                 (i * MAX_TX_BUF_LEN),
1810                                                 tx_buffer->length,
1811                                                 PCI_DMA_TODEVICE);
1812                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1813                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1814                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1815                                         ((cpu_to_le32(tx_buffer->length) &
1816                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1817                 }
1818         }
1819
1820         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1821                 /* note this one is a tcp header */
1822                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1823         /* The last tpd */
1824
1825         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1826         /* The last buffer info contain the skb address,
1827            so it will be free after unmap */
1828         tx_buffer->skb = skb;
1829 }
1830
1831 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1832                            struct atl1e_tpd_desc *tpd)
1833 {
1834         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1835         /* Force memory writes to complete before letting h/w
1836          * know there are new descriptors to fetch.  (Only
1837          * applicable for weak-ordered memory model archs,
1838          * such as IA-64). */
1839         wmb();
1840         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1841 }
1842
1843 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1844                                           struct net_device *netdev)
1845 {
1846         struct atl1e_adapter *adapter = netdev_priv(netdev);
1847         unsigned long flags;
1848         u16 tpd_req = 1;
1849         struct atl1e_tpd_desc *tpd;
1850
1851         if (test_bit(__AT_DOWN, &adapter->flags)) {
1852                 dev_kfree_skb_any(skb);
1853                 return NETDEV_TX_OK;
1854         }
1855
1856         if (unlikely(skb->len <= 0)) {
1857                 dev_kfree_skb_any(skb);
1858                 return NETDEV_TX_OK;
1859         }
1860         tpd_req = atl1e_cal_tdp_req(skb);
1861         if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1862                 return NETDEV_TX_LOCKED;
1863
1864         if (atl1e_tpd_avail(adapter) < tpd_req) {
1865                 /* no enough descriptor, just stop queue */
1866                 netif_stop_queue(netdev);
1867                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1868                 return NETDEV_TX_BUSY;
1869         }
1870
1871         tpd = atl1e_get_tpd(adapter);
1872
1873         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
1874                 u16 vlan_tag = vlan_tx_tag_get(skb);
1875                 u16 atl1e_vlan_tag;
1876
1877                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1878                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1879                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1880                                 TPD_VLAN_SHIFT;
1881         }
1882
1883         if (skb->protocol == htons(ETH_P_8021Q))
1884                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1885
1886         if (skb_network_offset(skb) != ETH_HLEN)
1887                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1888
1889         /* do TSO and check sum */
1890         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1891                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1892                 dev_kfree_skb_any(skb);
1893                 return NETDEV_TX_OK;
1894         }
1895
1896         atl1e_tx_map(adapter, skb, tpd);
1897         atl1e_tx_queue(adapter, tpd_req, tpd);
1898
1899         netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1900         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1901         return NETDEV_TX_OK;
1902 }
1903
1904 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1905 {
1906         struct net_device *netdev = adapter->netdev;
1907
1908         free_irq(adapter->pdev->irq, netdev);
1909
1910         if (adapter->have_msi)
1911                 pci_disable_msi(adapter->pdev);
1912 }
1913
1914 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1915 {
1916         struct pci_dev    *pdev   = adapter->pdev;
1917         struct net_device *netdev = adapter->netdev;
1918         int flags = 0;
1919         int err = 0;
1920
1921         adapter->have_msi = true;
1922         err = pci_enable_msi(adapter->pdev);
1923         if (err) {
1924                 dev_dbg(&pdev->dev,
1925                         "Unable to allocate MSI interrupt Error: %d\n", err);
1926                 adapter->have_msi = false;
1927         } else
1928                 netdev->irq = pdev->irq;
1929
1930
1931         if (!adapter->have_msi)
1932                 flags |= IRQF_SHARED;
1933         err = request_irq(adapter->pdev->irq, atl1e_intr, flags,
1934                         netdev->name, netdev);
1935         if (err) {
1936                 dev_dbg(&pdev->dev,
1937                         "Unable to allocate interrupt Error: %d\n", err);
1938                 if (adapter->have_msi)
1939                         pci_disable_msi(adapter->pdev);
1940                 return err;
1941         }
1942         dev_dbg(&pdev->dev, "atl1e_request_irq OK\n");
1943         return err;
1944 }
1945
1946 int atl1e_up(struct atl1e_adapter *adapter)
1947 {
1948         struct net_device *netdev = adapter->netdev;
1949         int err = 0;
1950         u32 val;
1951
1952         /* hardware has been reset, we need to reload some things */
1953         err = atl1e_init_hw(&adapter->hw);
1954         if (err) {
1955                 err = -EIO;
1956                 return err;
1957         }
1958         atl1e_init_ring_ptrs(adapter);
1959         atl1e_set_multi(netdev);
1960         atl1e_restore_vlan(adapter);
1961
1962         if (atl1e_configure(adapter)) {
1963                 err = -EIO;
1964                 goto err_up;
1965         }
1966
1967         clear_bit(__AT_DOWN, &adapter->flags);
1968         napi_enable(&adapter->napi);
1969         atl1e_irq_enable(adapter);
1970         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1971         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1972                       val | MASTER_CTRL_MANUAL_INT);
1973
1974 err_up:
1975         return err;
1976 }
1977
1978 void atl1e_down(struct atl1e_adapter *adapter)
1979 {
1980         struct net_device *netdev = adapter->netdev;
1981
1982         /* signal that we're down so the interrupt handler does not
1983          * reschedule our watchdog timer */
1984         set_bit(__AT_DOWN, &adapter->flags);
1985
1986 #ifdef NETIF_F_LLTX
1987         netif_stop_queue(netdev);
1988 #else
1989         netif_tx_disable(netdev);
1990 #endif
1991
1992         /* reset MAC to disable all RX/TX */
1993         atl1e_reset_hw(&adapter->hw);
1994         msleep(1);
1995
1996         napi_disable(&adapter->napi);
1997         atl1e_del_timer(adapter);
1998         atl1e_irq_disable(adapter);
1999
2000         netif_carrier_off(netdev);
2001         adapter->link_speed = SPEED_0;
2002         adapter->link_duplex = -1;
2003         atl1e_clean_tx_ring(adapter);
2004         atl1e_clean_rx_ring(adapter);
2005 }
2006
2007 /*
2008  * atl1e_open - Called when a network interface is made active
2009  * @netdev: network interface device structure
2010  *
2011  * Returns 0 on success, negative value on failure
2012  *
2013  * The open entry point is called when a network interface is made
2014  * active by the system (IFF_UP).  At this point all resources needed
2015  * for transmit and receive operations are allocated, the interrupt
2016  * handler is registered with the OS, the watchdog timer is started,
2017  * and the stack is notified that the interface is ready.
2018  */
2019 static int atl1e_open(struct net_device *netdev)
2020 {
2021         struct atl1e_adapter *adapter = netdev_priv(netdev);
2022         int err;
2023
2024         /* disallow open during test */
2025         if (test_bit(__AT_TESTING, &adapter->flags))
2026                 return -EBUSY;
2027
2028         /* allocate rx/tx dma buffer & descriptors */
2029         atl1e_init_ring_resources(adapter);
2030         err = atl1e_setup_ring_resources(adapter);
2031         if (unlikely(err))
2032                 return err;
2033
2034         err = atl1e_request_irq(adapter);
2035         if (unlikely(err))
2036                 goto err_req_irq;
2037
2038         err = atl1e_up(adapter);
2039         if (unlikely(err))
2040                 goto err_up;
2041
2042         return 0;
2043
2044 err_up:
2045         atl1e_free_irq(adapter);
2046 err_req_irq:
2047         atl1e_free_ring_resources(adapter);
2048         atl1e_reset_hw(&adapter->hw);
2049
2050         return err;
2051 }
2052
2053 /*
2054  * atl1e_close - Disables a network interface
2055  * @netdev: network interface device structure
2056  *
2057  * Returns 0, this is not allowed to fail
2058  *
2059  * The close entry point is called when an interface is de-activated
2060  * by the OS.  The hardware is still under the drivers control, but
2061  * needs to be disabled.  A global MAC reset is issued to stop the
2062  * hardware, and all transmit and receive resources are freed.
2063  */
2064 static int atl1e_close(struct net_device *netdev)
2065 {
2066         struct atl1e_adapter *adapter = netdev_priv(netdev);
2067
2068         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2069         atl1e_down(adapter);
2070         atl1e_free_irq(adapter);
2071         atl1e_free_ring_resources(adapter);
2072
2073         return 0;
2074 }
2075
2076 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2077 {
2078         struct net_device *netdev = pci_get_drvdata(pdev);
2079         struct atl1e_adapter *adapter = netdev_priv(netdev);
2080         struct atl1e_hw *hw = &adapter->hw;
2081         u32 ctrl = 0;
2082         u32 mac_ctrl_data = 0;
2083         u32 wol_ctrl_data = 0;
2084         u16 mii_advertise_data = 0;
2085         u16 mii_bmsr_data = 0;
2086         u16 mii_intr_status_data = 0;
2087         u32 wufc = adapter->wol;
2088         u32 i;
2089 #ifdef CONFIG_PM
2090         int retval = 0;
2091 #endif
2092
2093         if (netif_running(netdev)) {
2094                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2095                 atl1e_down(adapter);
2096         }
2097         netif_device_detach(netdev);
2098
2099 #ifdef CONFIG_PM
2100         retval = pci_save_state(pdev);
2101         if (retval)
2102                 return retval;
2103 #endif
2104
2105         if (wufc) {
2106                 /* get link status */
2107                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2108                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2109
2110                 mii_advertise_data = MII_AR_10T_HD_CAPS;
2111
2112                 if ((atl1e_write_phy_reg(hw, MII_AT001_CR, 0) != 0) ||
2113                     (atl1e_write_phy_reg(hw,
2114                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2115                     (atl1e_phy_commit(hw)) != 0) {
2116                         dev_dbg(&pdev->dev, "set phy register failed\n");
2117                         goto wol_dis;
2118                 }
2119
2120                 hw->phy_configured = false; /* re-init PHY when resume */
2121
2122                 /* turn on magic packet wol */
2123                 if (wufc & AT_WUFC_MAG)
2124                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2125
2126                 if (wufc & AT_WUFC_LNKC) {
2127                 /* if orignal link status is link, just wait for retrive link */
2128                         if (mii_bmsr_data & BMSR_LSTATUS) {
2129                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2130                                         msleep(100);
2131                                         atl1e_read_phy_reg(hw, MII_BMSR,
2132                                                         (u16 *)&mii_bmsr_data);
2133                                         if (mii_bmsr_data & BMSR_LSTATUS)
2134                                                 break;
2135                                 }
2136
2137                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2138                                         dev_dbg(&pdev->dev,
2139                                                 "%s: Link may change"
2140                                                 "when suspend\n",
2141                                                 atl1e_driver_name);
2142                         }
2143                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2144                         /* only link up can wake up */
2145                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2146                                 dev_dbg(&pdev->dev, "%s: read write phy "
2147                                                   "register failed.\n",
2148                                                   atl1e_driver_name);
2149                                 goto wol_dis;
2150                         }
2151                 }
2152                 /* clear phy interrupt */
2153                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2154                 /* Config MAC Ctrl register */
2155                 mac_ctrl_data = MAC_CTRL_RX_EN;
2156                 /* set to 10/100M halt duplex */
2157                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2158                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2159                                  MAC_CTRL_PRMLEN_MASK) <<
2160                                  MAC_CTRL_PRMLEN_SHIFT);
2161
2162                 if (adapter->vlgrp)
2163                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
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                 dev_dbg(&pdev->dev,
2170                         "%s: suspend MAC=0x%x\n",
2171                         atl1e_driver_name, mac_ctrl_data);
2172
2173                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2174                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2175                 /* pcie patch */
2176                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2177                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2178                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2179                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2180                 goto suspend_exit;
2181         }
2182 wol_dis:
2183
2184         /* WOL disabled */
2185         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2186
2187         /* pcie patch */
2188         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2189         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2190         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2191
2192         atl1e_force_ps(hw);
2193         hw->phy_configured = false; /* re-init PHY when resume */
2194
2195         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2196
2197 suspend_exit:
2198
2199         if (netif_running(netdev))
2200                 atl1e_free_irq(adapter);
2201
2202         pci_disable_device(pdev);
2203
2204         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2205
2206         return 0;
2207 }
2208
2209 #ifdef CONFIG_PM
2210 static int atl1e_resume(struct pci_dev *pdev)
2211 {
2212         struct net_device *netdev = pci_get_drvdata(pdev);
2213         struct atl1e_adapter *adapter = netdev_priv(netdev);
2214         u32 err;
2215
2216         pci_set_power_state(pdev, PCI_D0);
2217         pci_restore_state(pdev);
2218
2219         err = pci_enable_device(pdev);
2220         if (err) {
2221                 dev_err(&pdev->dev, "ATL1e: Cannot enable PCI"
2222                                 " device from suspend\n");
2223                 return err;
2224         }
2225
2226         pci_set_master(pdev);
2227
2228         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2229
2230         pci_enable_wake(pdev, PCI_D3hot, 0);
2231         pci_enable_wake(pdev, PCI_D3cold, 0);
2232
2233         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2234
2235         if (netif_running(netdev)) {
2236                 err = atl1e_request_irq(adapter);
2237                 if (err)
2238                         return err;
2239         }
2240
2241         atl1e_reset_hw(&adapter->hw);
2242
2243         if (netif_running(netdev))
2244                 atl1e_up(adapter);
2245
2246         netif_device_attach(netdev);
2247
2248         return 0;
2249 }
2250 #endif
2251
2252 static void atl1e_shutdown(struct pci_dev *pdev)
2253 {
2254         atl1e_suspend(pdev, PMSG_SUSPEND);
2255 }
2256
2257 static const struct net_device_ops atl1e_netdev_ops = {
2258         .ndo_open               = atl1e_open,
2259         .ndo_stop               = atl1e_close,
2260         .ndo_start_xmit         = atl1e_xmit_frame,
2261         .ndo_get_stats          = atl1e_get_stats,
2262         .ndo_set_multicast_list = atl1e_set_multi,
2263         .ndo_validate_addr      = eth_validate_addr,
2264         .ndo_set_mac_address    = atl1e_set_mac_addr,
2265         .ndo_change_mtu         = atl1e_change_mtu,
2266         .ndo_do_ioctl           = atl1e_ioctl,
2267         .ndo_tx_timeout         = atl1e_tx_timeout,
2268         .ndo_vlan_rx_register   = atl1e_vlan_rx_register,
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->irq  = pdev->irq;
2281         netdev->netdev_ops = &atl1e_netdev_ops;
2282
2283         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2284         atl1e_set_ethtool_ops(netdev);
2285
2286         netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM |
2287                 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2288         netdev->features |= NETIF_F_LLTX;
2289         netdev->features |= NETIF_F_TSO;
2290         netdev->features |= NETIF_F_TSO6;
2291
2292         return 0;
2293 }
2294
2295 /*
2296  * atl1e_probe - Device Initialization Routine
2297  * @pdev: PCI device information struct
2298  * @ent: entry in atl1e_pci_tbl
2299  *
2300  * Returns 0 on success, negative on failure
2301  *
2302  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2303  * The OS initialization, configuring of the adapter private structure,
2304  * and a hardware reset occur.
2305  */
2306 static int __devinit atl1e_probe(struct pci_dev *pdev,
2307                                  const struct pci_device_id *ent)
2308 {
2309         struct net_device *netdev;
2310         struct atl1e_adapter *adapter = NULL;
2311         static int cards_found;
2312
2313         int err = 0;
2314
2315         err = pci_enable_device(pdev);
2316         if (err) {
2317                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2318                 return err;
2319         }
2320
2321         /*
2322          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2323          * shared register for the high 32 bits, so only a single, aligned,
2324          * 4 GB physical address range can be used at a time.
2325          *
2326          * Supporting 64-bit DMA on this hardware is more trouble than it's
2327          * worth.  It is far easier to limit to 32-bit DMA than update
2328          * various kernel subsystems to support the mechanics required by a
2329          * fixed-high-32-bit system.
2330          */
2331         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2332             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2333                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2334                 goto err_dma;
2335         }
2336
2337         err = pci_request_regions(pdev, atl1e_driver_name);
2338         if (err) {
2339                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2340                 goto err_pci_reg;
2341         }
2342
2343         pci_set_master(pdev);
2344
2345         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2346         if (netdev == NULL) {
2347                 err = -ENOMEM;
2348                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2349                 goto err_alloc_etherdev;
2350         }
2351
2352         err = atl1e_init_netdev(netdev, pdev);
2353         if (err) {
2354                 dev_err(&pdev->dev, "init netdevice failed\n");
2355                 goto err_init_netdev;
2356         }
2357         adapter = netdev_priv(netdev);
2358         adapter->bd_number = cards_found;
2359         adapter->netdev = netdev;
2360         adapter->pdev = pdev;
2361         adapter->hw.adapter = adapter;
2362         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2363         if (!adapter->hw.hw_addr) {
2364                 err = -EIO;
2365                 dev_err(&pdev->dev, "cannot map device registers\n");
2366                 goto err_ioremap;
2367         }
2368         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2369
2370         /* init mii data */
2371         adapter->mii.dev = netdev;
2372         adapter->mii.mdio_read  = atl1e_mdio_read;
2373         adapter->mii.mdio_write = atl1e_mdio_write;
2374         adapter->mii.phy_id_mask = 0x1f;
2375         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2376
2377         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2378
2379         init_timer(&adapter->phy_config_timer);
2380         adapter->phy_config_timer.function = &atl1e_phy_config;
2381         adapter->phy_config_timer.data = (unsigned long) adapter;
2382
2383         /* get user settings */
2384         atl1e_check_options(adapter);
2385         /*
2386          * Mark all PCI regions associated with PCI device
2387          * pdev as being reserved by owner atl1e_driver_name
2388          * Enables bus-mastering on the device and calls
2389          * pcibios_set_master to do the needed arch specific settings
2390          */
2391         atl1e_setup_pcicmd(pdev);
2392         /* setup the private structure */
2393         err = atl1e_sw_init(adapter);
2394         if (err) {
2395                 dev_err(&pdev->dev, "net device private data init failed\n");
2396                 goto err_sw_init;
2397         }
2398
2399         /* Init GPHY as early as possible due to power saving issue  */
2400         atl1e_phy_init(&adapter->hw);
2401         /* reset the controller to
2402          * put the device in a known good starting state */
2403         err = atl1e_reset_hw(&adapter->hw);
2404         if (err) {
2405                 err = -EIO;
2406                 goto err_reset;
2407         }
2408
2409         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2410                 err = -EIO;
2411                 dev_err(&pdev->dev, "get mac address failed\n");
2412                 goto err_eeprom;
2413         }
2414
2415         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2416         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2417         dev_dbg(&pdev->dev, "mac address : %02x-%02x-%02x-%02x-%02x-%02x\n",
2418                         adapter->hw.mac_addr[0], adapter->hw.mac_addr[1],
2419                         adapter->hw.mac_addr[2], adapter->hw.mac_addr[3],
2420                         adapter->hw.mac_addr[4], adapter->hw.mac_addr[5]);
2421
2422         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2423         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2424         err = register_netdev(netdev);
2425         if (err) {
2426                 dev_err(&pdev->dev, "register netdevice failed\n");
2427                 goto err_register;
2428         }
2429
2430         /* assume we have no link for now */
2431         netif_stop_queue(netdev);
2432         netif_carrier_off(netdev);
2433
2434         cards_found++;
2435
2436         return 0;
2437
2438 err_reset:
2439 err_register:
2440 err_sw_init:
2441 err_eeprom:
2442         iounmap(adapter->hw.hw_addr);
2443 err_init_netdev:
2444 err_ioremap:
2445         free_netdev(netdev);
2446 err_alloc_etherdev:
2447         pci_release_regions(pdev);
2448 err_pci_reg:
2449 err_dma:
2450         pci_disable_device(pdev);
2451         return err;
2452 }
2453
2454 /*
2455  * atl1e_remove - Device Removal Routine
2456  * @pdev: PCI device information struct
2457  *
2458  * atl1e_remove is called by the PCI subsystem to alert the driver
2459  * that it should release a PCI device.  The could be caused by a
2460  * Hot-Plug event, or because the driver is going to be removed from
2461  * memory.
2462  */
2463 static void __devexit atl1e_remove(struct pci_dev *pdev)
2464 {
2465         struct net_device *netdev = pci_get_drvdata(pdev);
2466         struct atl1e_adapter *adapter = netdev_priv(netdev);
2467
2468         /*
2469          * flush_scheduled work may reschedule our watchdog task, so
2470          * explicitly disable watchdog tasks from being rescheduled
2471          */
2472         set_bit(__AT_DOWN, &adapter->flags);
2473
2474         atl1e_del_timer(adapter);
2475         atl1e_cancel_work(adapter);
2476
2477         unregister_netdev(netdev);
2478         atl1e_free_ring_resources(adapter);
2479         atl1e_force_ps(&adapter->hw);
2480         iounmap(adapter->hw.hw_addr);
2481         pci_release_regions(pdev);
2482         free_netdev(netdev);
2483         pci_disable_device(pdev);
2484 }
2485
2486 /*
2487  * atl1e_io_error_detected - called when PCI error is detected
2488  * @pdev: Pointer to PCI device
2489  * @state: The current pci connection state
2490  *
2491  * This function is called after a PCI bus error affecting
2492  * this device has been detected.
2493  */
2494 static pci_ers_result_t
2495 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2496 {
2497         struct net_device *netdev = pci_get_drvdata(pdev);
2498         struct atl1e_adapter *adapter = netdev_priv(netdev);
2499
2500         netif_device_detach(netdev);
2501
2502         if (state == pci_channel_io_perm_failure)
2503                 return PCI_ERS_RESULT_DISCONNECT;
2504
2505         if (netif_running(netdev))
2506                 atl1e_down(adapter);
2507
2508         pci_disable_device(pdev);
2509
2510         /* Request a slot slot reset. */
2511         return PCI_ERS_RESULT_NEED_RESET;
2512 }
2513
2514 /*
2515  * atl1e_io_slot_reset - called after the pci bus has been reset.
2516  * @pdev: Pointer to PCI device
2517  *
2518  * Restart the card from scratch, as if from a cold-boot. Implementation
2519  * resembles the first-half of the e1000_resume routine.
2520  */
2521 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2522 {
2523         struct net_device *netdev = pci_get_drvdata(pdev);
2524         struct atl1e_adapter *adapter = netdev_priv(netdev);
2525
2526         if (pci_enable_device(pdev)) {
2527                 dev_err(&pdev->dev,
2528                        "ATL1e: Cannot re-enable PCI device after reset.\n");
2529                 return PCI_ERS_RESULT_DISCONNECT;
2530         }
2531         pci_set_master(pdev);
2532
2533         pci_enable_wake(pdev, PCI_D3hot, 0);
2534         pci_enable_wake(pdev, PCI_D3cold, 0);
2535
2536         atl1e_reset_hw(&adapter->hw);
2537
2538         return PCI_ERS_RESULT_RECOVERED;
2539 }
2540
2541 /*
2542  * atl1e_io_resume - called when traffic can start flowing again.
2543  * @pdev: Pointer to PCI device
2544  *
2545  * This callback is called when the error recovery driver tells us that
2546  * its OK to resume normal operation. Implementation resembles the
2547  * second-half of the atl1e_resume routine.
2548  */
2549 static void atl1e_io_resume(struct pci_dev *pdev)
2550 {
2551         struct net_device *netdev = pci_get_drvdata(pdev);
2552         struct atl1e_adapter *adapter = netdev_priv(netdev);
2553
2554         if (netif_running(netdev)) {
2555                 if (atl1e_up(adapter)) {
2556                         dev_err(&pdev->dev,
2557                           "ATL1e: can't bring device back up after reset\n");
2558                         return;
2559                 }
2560         }
2561
2562         netif_device_attach(netdev);
2563 }
2564
2565 static struct pci_error_handlers atl1e_err_handler = {
2566         .error_detected = atl1e_io_error_detected,
2567         .slot_reset = atl1e_io_slot_reset,
2568         .resume = atl1e_io_resume,
2569 };
2570
2571 static struct pci_driver atl1e_driver = {
2572         .name     = atl1e_driver_name,
2573         .id_table = atl1e_pci_tbl,
2574         .probe    = atl1e_probe,
2575         .remove   = __devexit_p(atl1e_remove),
2576         /* Power Managment Hooks */
2577 #ifdef CONFIG_PM
2578         .suspend  = atl1e_suspend,
2579         .resume   = atl1e_resume,
2580 #endif
2581         .shutdown = atl1e_shutdown,
2582         .err_handler = &atl1e_err_handler
2583 };
2584
2585 /*
2586  * atl1e_init_module - Driver Registration Routine
2587  *
2588  * atl1e_init_module is the first routine called when the driver is
2589  * loaded. All it does is register with the PCI subsystem.
2590  */
2591 static int __init atl1e_init_module(void)
2592 {
2593         return pci_register_driver(&atl1e_driver);
2594 }
2595
2596 /*
2597  * atl1e_exit_module - Driver Exit Cleanup Routine
2598  *
2599  * atl1e_exit_module is called just before the driver is removed
2600  * from memory.
2601  */
2602 static void __exit atl1e_exit_module(void)
2603 {
2604         pci_unregister_driver(&atl1e_driver);
2605 }
2606
2607 module_init(atl1e_init_module);
2608 module_exit(atl1e_exit_module);