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

   1 /*
   2  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1e.h"
  23
  24 #define DRV_VERSION "1.0.0.7-NAPI"
  25
  26 char atl1e_driver_name[] = "ATL1E";
  27 char atl1e_driver_version[] = DRV_VERSION;
  28 #define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
  29 /*
  30  * atl1e_pci_tbl - PCI Device ID Table
  31  *
  32  * Wildcard entries (PCI_ANY_ID) should come last
  33  * Last entry must be all 0s
  34  *
  35  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  36  *   Class, Class Mask, private data (not used) }
  37  */
  38 static DEFINE_PCI_DEVICE_TABLE(atl1e_pci_tbl) = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  45
  46 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(DRV_VERSION);
  50
  51 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  52
  53 static const u16
  54 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  55 {
  56         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  57         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  58         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  59         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  60 };
  61
  62 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  63 {
  64         REG_RXF0_BASE_ADDR_HI,
  65         REG_RXF1_BASE_ADDR_HI,
  66         REG_RXF2_BASE_ADDR_HI,
  67         REG_RXF3_BASE_ADDR_HI
  68 };
  69
  70 static const u16
  71 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  72 {
  73         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  74         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  75         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  76         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  77 };
  78
  79 static const u16
  80 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  81 {
  82         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  83         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  84         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  85         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  86 };
  87
  88 static const u16 atl1e_pay_load_size[] = {
  89         128, 256, 512, 1024, 2048, 4096,
  90 };
  91
  92 /*
  93  * atl1e_irq_enable - Enable default interrupt generation settings
  94  * @adapter: board private structure
  95  */
  96 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  97 {
  98         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  99                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 100                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
 101                 AT_WRITE_FLUSH(&adapter->hw);
 102         }
 103 }
 104
 105 /*
 106  * atl1e_irq_disable - Mask off interrupt generation on the NIC
 107  * @adapter: board private structure
 108  */
 109 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
 110 {
 111         atomic_inc(&adapter->irq_sem);
 112         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 113         AT_WRITE_FLUSH(&adapter->hw);
 114         synchronize_irq(adapter->pdev->irq);
 115 }
 116
 117 /*
 118  * atl1e_irq_reset - reset interrupt confiure on the NIC
 119  * @adapter: board private structure
 120  */
 121 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 122 {
 123         atomic_set(&adapter->irq_sem, 0);
 124         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 125         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 126         AT_WRITE_FLUSH(&adapter->hw);
 127 }
 128
 129 /*
 130  * atl1e_phy_config - Timer Call-back
 131  * @data: pointer to netdev cast into an unsigned long
 132  */
 133 static void atl1e_phy_config(unsigned long data)
 134 {
 135         struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
 136         struct atl1e_hw *hw = &adapter->hw;
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&adapter->mdio_lock, flags);
 140         atl1e_restart_autoneg(hw);
 141         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 142 }
 143
 144 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 145 {
 146
 147         WARN_ON(in_interrupt());
 148         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 149                 msleep(1);
 150         atl1e_down(adapter);
 151         atl1e_up(adapter);
 152         clear_bit(__AT_RESETTING, &adapter->flags);
 153 }
 154
 155 static void atl1e_reset_task(struct work_struct *work)
 156 {
 157         struct atl1e_adapter *adapter;
 158         adapter = container_of(work, struct atl1e_adapter, reset_task);
 159
 160         atl1e_reinit_locked(adapter);
 161 }
 162
 163 static int atl1e_check_link(struct atl1e_adapter *adapter)
 164 {
 165         struct atl1e_hw *hw = &adapter->hw;
 166         struct net_device *netdev = adapter->netdev;
 167         int err = 0;
 168         u16 speed, duplex, phy_data;
 169
 170         /* MII_BMSR must read twice */
 171         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 172         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 173         if ((phy_data & BMSR_LSTATUS) == 0) {
 174                 /* link down */
 175                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 176                         u32 value;
 177                         /* disable rx */
 178                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 179                         value &= ~MAC_CTRL_RX_EN;
 180                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 181                         adapter->link_speed = SPEED_0;
 182                         netif_carrier_off(netdev);
 183                         netif_stop_queue(netdev);
 184                 }
 185         } else {
 186                 /* Link Up */
 187                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 188                 if (unlikely(err))
 189                         return err;
 190
 191                 /* link result is our setting */
 192                 if (adapter->link_speed != speed ||
 193                     adapter->link_duplex != duplex) {
 194                         adapter->link_speed  = speed;
 195                         adapter->link_duplex = duplex;
 196                         atl1e_setup_mac_ctrl(adapter);
 197                         netdev_info(netdev,
 198                                     "NIC Link is Up <%d Mbps %s Duplex>\n",
 199                                     adapter->link_speed,
 200                                     adapter->link_duplex == FULL_DUPLEX ?
 201                                     "Full" : "Half");
 202                 }
 203
 204                 if (!netif_carrier_ok(netdev)) {
 205                         /* Link down -> Up */
 206                         netif_carrier_on(netdev);
 207                         netif_wake_queue(netdev);
 208                 }
 209         }
 210         return 0;
 211 }
 212
 213 /*
 214  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 215  * @netdev: network interface device structure
 216  */
 217 static void atl1e_link_chg_task(struct work_struct *work)
 218 {
 219         struct atl1e_adapter *adapter;
 220         unsigned long flags;
 221
 222         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 223         spin_lock_irqsave(&adapter->mdio_lock, flags);
 224         atl1e_check_link(adapter);
 225         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 226 }
 227
 228 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 229 {
 230         struct net_device *netdev = adapter->netdev;
 231         u16 phy_data = 0;
 232         u16 link_up = 0;
 233
 234         spin_lock(&adapter->mdio_lock);
 235         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 236         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 237         spin_unlock(&adapter->mdio_lock);
 238         link_up = phy_data & BMSR_LSTATUS;
 239         /* notify upper layer link down ASAP */
 240         if (!link_up) {
 241                 if (netif_carrier_ok(netdev)) {
 242                         /* old link state: Up */
 243                         netdev_info(netdev, "NIC Link is Down\n");
 244                         adapter->link_speed = SPEED_0;
 245                         netif_stop_queue(netdev);
 246                 }
 247         }
 248         schedule_work(&adapter->link_chg_task);
 249 }
 250
 251 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 252 {
 253         del_timer_sync(&adapter->phy_config_timer);
 254 }
 255
 256 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 257 {
 258         cancel_work_sync(&adapter->reset_task);
 259         cancel_work_sync(&adapter->link_chg_task);
 260 }
 261
 262 /*
 263  * atl1e_tx_timeout - Respond to a Tx Hang
 264  * @netdev: network interface device structure
 265  */
 266 static void atl1e_tx_timeout(struct net_device *netdev)
 267 {
 268         struct atl1e_adapter *adapter = netdev_priv(netdev);
 269
 270         /* Do the reset outside of interrupt context */
 271         schedule_work(&adapter->reset_task);
 272 }
 273
 274 /*
 275  * atl1e_set_multi - Multicast and Promiscuous mode set
 276  * @netdev: network interface device structure
 277  *
 278  * The set_multi entry point is called whenever the multicast address
 279  * list or the network interface flags are updated.  This routine is
 280  * responsible for configuring the hardware for proper multicast,
 281  * promiscuous mode, and all-multi behavior.
 282  */
 283 static void atl1e_set_multi(struct net_device *netdev)
 284 {
 285         struct atl1e_adapter *adapter = netdev_priv(netdev);
 286         struct atl1e_hw *hw = &adapter->hw;
 287         struct netdev_hw_addr *ha;
 288         u32 mac_ctrl_data = 0;
 289         u32 hash_value;
 290
 291         /* Check for Promiscuous and All Multicast modes */
 292         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 293
 294         if (netdev->flags & IFF_PROMISC) {
 295                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 296         } else if (netdev->flags & IFF_ALLMULTI) {
 297                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 298                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 299         } else {
 300                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 301         }
 302
 303         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 304
 305         /* clear the old settings from the multicast hash table */
 306         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 307         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 308
 309         /* comoute mc addresses' hash value ,and put it into hash table */
 310         netdev_for_each_mc_addr(ha, netdev) {
 311                 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 312                 atl1e_hash_set(hw, hash_value);
 313         }
 314 }
 315
 316 static void __atl1e_vlan_mode(u32 features, u32 *mac_ctrl_data)
 317 {
 318         if (features & NETIF_F_HW_VLAN_RX) {
 319                 /* enable VLAN tag insert/strip */
 320                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 321         } else {
 322                 /* disable VLAN tag insert/strip */
 323                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 324         }
 325 }
 326
 327 static void atl1e_vlan_mode(struct net_device *netdev, u32 features)
 328 {
 329         struct atl1e_adapter *adapter = netdev_priv(netdev);
 330         u32 mac_ctrl_data = 0;
 331
 332         netdev_dbg(adapter->netdev, "%s\n", __func__);
 333
 334         atl1e_irq_disable(adapter);
 335         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 336         __atl1e_vlan_mode(features, &mac_ctrl_data);
 337         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 338         atl1e_irq_enable(adapter);
 339 }
 340
 341 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 342 {
 343         netdev_dbg(adapter->netdev, "%s\n", __func__);
 344         atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
 345 }
 346
 347 /*
 348  * atl1e_set_mac - Change the Ethernet Address of the NIC
 349  * @netdev: network interface device structure
 350  * @p: pointer to an address structure
 351  *
 352  * Returns 0 on success, negative on failure
 353  */
 354 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 355 {
 356         struct atl1e_adapter *adapter = netdev_priv(netdev);
 357         struct sockaddr *addr = p;
 358
 359         if (!is_valid_ether_addr(addr->sa_data))
 360                 return -EADDRNOTAVAIL;
 361
 362         if (netif_running(netdev))
 363                 return -EBUSY;
 364
 365         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 366         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 367
 368         atl1e_hw_set_mac_addr(&adapter->hw);
 369
 370         return 0;
 371 }
 372
 373 static u32 atl1e_fix_features(struct net_device *netdev, u32 features)
 374 {
 375         /*
 376          * Since there is no support for separate rx/tx vlan accel
 377          * enable/disable make sure tx flag is always in same state as rx.
 378          */
 379         if (features & NETIF_F_HW_VLAN_RX)
 380                 features |= NETIF_F_HW_VLAN_TX;
 381         else
 382                 features &= ~NETIF_F_HW_VLAN_TX;
 383
 384         return features;
 385 }
 386
 387 static int atl1e_set_features(struct net_device *netdev, u32 features)
 388 {
 389         u32 changed = netdev->features ^ features;
 390
 391         if (changed & NETIF_F_HW_VLAN_RX)
 392                 atl1e_vlan_mode(netdev, features);
 393
 394         return 0;
 395 }
 396
 397 /*
 398  * atl1e_change_mtu - Change the Maximum Transfer Unit
 399  * @netdev: network interface device structure
 400  * @new_mtu: new value for maximum frame size
 401  *
 402  * Returns 0 on success, negative on failure
 403  */
 404 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 405 {
 406         struct atl1e_adapter *adapter = netdev_priv(netdev);
 407         int old_mtu   = netdev->mtu;
 408         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 409
 410         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 411                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 412                 netdev_warn(adapter->netdev, "invalid MTU setting\n");
 413                 return -EINVAL;
 414         }
 415         /* set MTU */
 416         if (old_mtu != new_mtu && netif_running(netdev)) {
 417                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 418                         msleep(1);
 419                 netdev->mtu = new_mtu;
 420                 adapter->hw.max_frame_size = new_mtu;
 421                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 422                 atl1e_down(adapter);
 423                 atl1e_up(adapter);
 424                 clear_bit(__AT_RESETTING, &adapter->flags);
 425         }
 426         return 0;
 427 }
 428
 429 /*
 430  *  caller should hold mdio_lock
 431  */
 432 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 433 {
 434         struct atl1e_adapter *adapter = netdev_priv(netdev);
 435         u16 result;
 436
 437         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 438         return result;
 439 }
 440
 441 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 442                              int reg_num, int val)
 443 {
 444         struct atl1e_adapter *adapter = netdev_priv(netdev);
 445
 446         atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 447 }
 448
 449 /*
 450  * atl1e_mii_ioctl -
 451  * @netdev:
 452  * @ifreq:
 453  * @cmd:
 454  */
 455 static int atl1e_mii_ioctl(struct net_device *netdev,
 456                            struct ifreq *ifr, int cmd)
 457 {
 458         struct atl1e_adapter *adapter = netdev_priv(netdev);
 459         struct mii_ioctl_data *data = if_mii(ifr);
 460         unsigned long flags;
 461         int retval = 0;
 462
 463         if (!netif_running(netdev))
 464                 return -EINVAL;
 465
 466         spin_lock_irqsave(&adapter->mdio_lock, flags);
 467         switch (cmd) {
 468         case SIOCGMIIPHY:
 469                 data->phy_id = 0;
 470                 break;
 471
 472         case SIOCGMIIREG:
 473                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 474                                     &data->val_out)) {
 475                         retval = -EIO;
 476                         goto out;
 477                 }
 478                 break;
 479
 480         case SIOCSMIIREG:
 481                 if (data->reg_num & ~(0x1F)) {
 482                         retval = -EFAULT;
 483                         goto out;
 484                 }
 485
 486                 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 487                            data->reg_num, data->val_in);
 488                 if (atl1e_write_phy_reg(&adapter->hw,
 489                                      data->reg_num, data->val_in)) {
 490                         retval = -EIO;
 491                         goto out;
 492                 }
 493                 break;
 494
 495         default:
 496                 retval = -EOPNOTSUPP;
 497                 break;
 498         }
 499 out:
 500         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 501         return retval;
 502
 503 }
 504
 505 /*
 506  * atl1e_ioctl -
 507  * @netdev:
 508  * @ifreq:
 509  * @cmd:
 510  */
 511 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 512 {
 513         switch (cmd) {
 514         case SIOCGMIIPHY:
 515         case SIOCGMIIREG:
 516         case SIOCSMIIREG:
 517                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 518         default:
 519                 return -EOPNOTSUPP;
 520         }
 521 }
 522
 523 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 524 {
 525         u16 cmd;
 526
 527         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 528         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 529         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 530         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 531
 532         /*
 533          * some motherboards BIOS(PXE/EFI) driver may set PME
 534          * while they transfer control to OS (Windows/Linux)
 535          * so we should clear this bit before NIC work normally
 536          */
 537         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 538         msleep(1);
 539 }
 540
 541 /*
 542  * atl1e_alloc_queues - Allocate memory for all rings
 543  * @adapter: board private structure to initialize
 544  *
 545  */
 546 static int __devinit atl1e_alloc_queues(struct atl1e_adapter *adapter)
 547 {
 548         return 0;
 549 }
 550
 551 /*
 552  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 553  * @adapter: board private structure to initialize
 554  *
 555  * atl1e_sw_init initializes the Adapter private data structure.
 556  * Fields are initialized based on PCI device information and
 557  * OS network device settings (MTU size).
 558  */
 559 static int __devinit atl1e_sw_init(struct atl1e_adapter *adapter)
 560 {
 561         struct atl1e_hw *hw   = &adapter->hw;
 562         struct pci_dev  *pdev = adapter->pdev;
 563         u32 phy_status_data = 0;
 564
 565         adapter->wol = 0;
 566         adapter->link_speed = SPEED_0;   /* hardware init */
 567         adapter->link_duplex = FULL_DUPLEX;
 568         adapter->num_rx_queues = 1;
 569
 570         /* PCI config space info */
 571         hw->vendor_id = pdev->vendor;
 572         hw->device_id = pdev->device;
 573         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 574         hw->subsystem_id = pdev->subsystem_device;
 575         hw->revision_id  = pdev->revision;
 576
 577         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 578
 579         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 580         /* nic type */
 581         if (hw->revision_id >= 0xF0) {
 582                 hw->nic_type = athr_l2e_revB;
 583         } else {
 584                 if (phy_status_data & PHY_STATUS_100M)
 585                         hw->nic_type = athr_l1e;
 586                 else
 587                         hw->nic_type = athr_l2e_revA;
 588         }
 589
 590         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 591
 592         if (phy_status_data & PHY_STATUS_EMI_CA)
 593                 hw->emi_ca = true;
 594         else
 595                 hw->emi_ca = false;
 596
 597         hw->phy_configured = false;
 598         hw->preamble_len = 7;
 599         hw->max_frame_size = adapter->netdev->mtu;
 600         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 601                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 602
 603         hw->rrs_type = atl1e_rrs_disable;
 604         hw->indirect_tab = 0;
 605         hw->base_cpu = 0;
 606
 607         /* need confirm */
 608
 609         hw->ict = 50000;                 /* 100ms */
 610         hw->smb_timer = 200000;          /* 200ms  */
 611         hw->tpd_burst = 5;
 612         hw->rrd_thresh = 1;
 613         hw->tpd_thresh = adapter->tx_ring.count / 2;
 614         hw->rx_count_down = 4;  /* 2us resolution */
 615         hw->tx_count_down = hw->imt * 4 / 3;
 616         hw->dmar_block = atl1e_dma_req_1024;
 617         hw->dmaw_block = atl1e_dma_req_1024;
 618         hw->dmar_dly_cnt = 15;
 619         hw->dmaw_dly_cnt = 4;
 620
 621         if (atl1e_alloc_queues(adapter)) {
 622                 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 623                 return -ENOMEM;
 624         }
 625
 626         atomic_set(&adapter->irq_sem, 1);
 627         spin_lock_init(&adapter->mdio_lock);
 628         spin_lock_init(&adapter->tx_lock);
 629
 630         set_bit(__AT_DOWN, &adapter->flags);
 631
 632         return 0;
 633 }
 634
 635 /*
 636  * atl1e_clean_tx_ring - Free Tx-skb
 637  * @adapter: board private structure
 638  */
 639 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 640 {
 641         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
 642                                 &adapter->tx_ring;
 643         struct atl1e_tx_buffer *tx_buffer = NULL;
 644         struct pci_dev *pdev = adapter->pdev;
 645         u16 index, ring_count;
 646
 647         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 648                 return;
 649
 650         ring_count = tx_ring->count;
 651         /* first unmmap dma */
 652         for (index = 0; index < ring_count; index++) {
 653                 tx_buffer = &tx_ring->tx_buffer[index];
 654                 if (tx_buffer->dma) {
 655                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 656                                 pci_unmap_single(pdev, tx_buffer->dma,
 657                                         tx_buffer->length, PCI_DMA_TODEVICE);
 658                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 659                                 pci_unmap_page(pdev, tx_buffer->dma,
 660                                         tx_buffer->length, PCI_DMA_TODEVICE);
 661                         tx_buffer->dma = 0;
 662                 }
 663         }
 664         /* second free skb */
 665         for (index = 0; index < ring_count; index++) {
 666                 tx_buffer = &tx_ring->tx_buffer[index];
 667                 if (tx_buffer->skb) {
 668                         dev_kfree_skb_any(tx_buffer->skb);
 669                         tx_buffer->skb = NULL;
 670                 }
 671         }
 672         /* Zero out Tx-buffers */
 673         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 674                                 ring_count);
 675         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 676                                 ring_count);
 677 }
 678
 679 /*
 680  * atl1e_clean_rx_ring - Free rx-reservation skbs
 681  * @adapter: board private structure
 682  */
 683 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 684 {
 685         struct atl1e_rx_ring *rx_ring =
 686                 (struct atl1e_rx_ring *)&adapter->rx_ring;
 687         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 688         u16 i, j;
 689
 690
 691         if (adapter->ring_vir_addr == NULL)
 692                 return;
 693         /* Zero out the descriptor ring */
 694         for (i = 0; i < adapter->num_rx_queues; i++) {
 695                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 696                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 697                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 698                                                 rx_ring->real_page_size);
 699                         }
 700                 }
 701         }
 702 }
 703
 704 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 705 {
 706         *ring_size = ((u32)(adapter->tx_ring.count *
 707                      sizeof(struct atl1e_tpd_desc) + 7
 708                         /* tx ring, qword align */
 709                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 710                         adapter->num_rx_queues + 31
 711                         /* rx ring,  32 bytes align */
 712                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 713                         sizeof(u32) + 3));
 714                         /* tx, rx cmd, dword align   */
 715 }
 716
 717 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 718 {
 719         struct atl1e_rx_ring *rx_ring = NULL;
 720
 721         rx_ring = &adapter->rx_ring;
 722
 723         rx_ring->real_page_size = adapter->rx_ring.page_size
 724                                  + adapter->hw.max_frame_size
 725                                  + ETH_HLEN + VLAN_HLEN
 726                                  + ETH_FCS_LEN;
 727         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 728         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 729
 730         adapter->ring_vir_addr = NULL;
 731         adapter->rx_ring.desc = NULL;
 732         rwlock_init(&adapter->tx_ring.tx_lock);
 733 }
 734
 735 /*
 736  * Read / Write Ptr Initialize:
 737  */
 738 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 739 {
 740         struct atl1e_tx_ring *tx_ring = NULL;
 741         struct atl1e_rx_ring *rx_ring = NULL;
 742         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 743         int i, j;
 744
 745         tx_ring = &adapter->tx_ring;
 746         rx_ring = &adapter->rx_ring;
 747         rx_page_desc = rx_ring->rx_page_desc;
 748
 749         tx_ring->next_to_use = 0;
 750         atomic_set(&tx_ring->next_to_clean, 0);
 751
 752         for (i = 0; i < adapter->num_rx_queues; i++) {
 753                 rx_page_desc[i].rx_using  = 0;
 754                 rx_page_desc[i].rx_nxseq = 0;
 755                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 756                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 757                         rx_page_desc[i].rx_page[j].read_offset = 0;
 758                 }
 759         }
 760 }
 761
 762 /*
 763  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 764  * @adapter: board private structure
 765  *
 766  * Free all transmit software resources
 767  */
 768 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 769 {
 770         struct pci_dev *pdev = adapter->pdev;
 771
 772         atl1e_clean_tx_ring(adapter);
 773         atl1e_clean_rx_ring(adapter);
 774
 775         if (adapter->ring_vir_addr) {
 776                 pci_free_consistent(pdev, adapter->ring_size,
 777                                 adapter->ring_vir_addr, adapter->ring_dma);
 778                 adapter->ring_vir_addr = NULL;
 779         }
 780
 781         if (adapter->tx_ring.tx_buffer) {
 782                 kfree(adapter->tx_ring.tx_buffer);
 783                 adapter->tx_ring.tx_buffer = NULL;
 784         }
 785 }
 786
 787 /*
 788  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 789  * @adapter: board private structure
 790  *
 791  * Return 0 on success, negative on failure
 792  */
 793 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 794 {
 795         struct pci_dev *pdev = adapter->pdev;
 796         struct atl1e_tx_ring *tx_ring;
 797         struct atl1e_rx_ring *rx_ring;
 798         struct atl1e_rx_page_desc  *rx_page_desc;
 799         int size, i, j;
 800         u32 offset = 0;
 801         int err = 0;
 802
 803         if (adapter->ring_vir_addr != NULL)
 804                 return 0; /* alloced already */
 805
 806         tx_ring = &adapter->tx_ring;
 807         rx_ring = &adapter->rx_ring;
 808
 809         /* real ring DMA buffer */
 810
 811         size = adapter->ring_size;
 812         adapter->ring_vir_addr = pci_alloc_consistent(pdev,
 813                         adapter->ring_size, &adapter->ring_dma);
 814
 815         if (adapter->ring_vir_addr == NULL) {
 816                 netdev_err(adapter->netdev,
 817                            "pci_alloc_consistent failed, size = D%d\n", size);
 818                 return -ENOMEM;
 819         }
 820
 821         memset(adapter->ring_vir_addr, 0, adapter->ring_size);
 822
 823         rx_page_desc = rx_ring->rx_page_desc;
 824
 825         /* Init TPD Ring */
 826         tx_ring->dma = roundup(adapter->ring_dma, 8);
 827         offset = tx_ring->dma - adapter->ring_dma;
 828         tx_ring->desc = adapter->ring_vir_addr + offset;
 829         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 830         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 831         if (tx_ring->tx_buffer == NULL) {
 832                 netdev_err(adapter->netdev, "kzalloc failed, size = D%d\n",
 833                            size);
 834                 err = -ENOMEM;
 835                 goto failed;
 836         }
 837
 838         /* Init RXF-Pages */
 839         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 840         offset = roundup(offset, 32);
 841
 842         for (i = 0; i < adapter->num_rx_queues; i++) {
 843                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 844                         rx_page_desc[i].rx_page[j].dma =
 845                                 adapter->ring_dma + offset;
 846                         rx_page_desc[i].rx_page[j].addr =
 847                                 adapter->ring_vir_addr + offset;
 848                         offset += rx_ring->real_page_size;
 849                 }
 850         }
 851
 852         /* Init CMB dma address */
 853         tx_ring->cmb_dma = adapter->ring_dma + offset;
 854         tx_ring->cmb = adapter->ring_vir_addr + offset;
 855         offset += sizeof(u32);
 856
 857         for (i = 0; i < adapter->num_rx_queues; i++) {
 858                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 859                         rx_page_desc[i].rx_page[j].write_offset_dma =
 860                                 adapter->ring_dma + offset;
 861                         rx_page_desc[i].rx_page[j].write_offset_addr =
 862                                 adapter->ring_vir_addr + offset;
 863                         offset += sizeof(u32);
 864                 }
 865         }
 866
 867         if (unlikely(offset > adapter->ring_size)) {
 868                 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 869                            offset, adapter->ring_size);
 870                 err = -1;
 871                 goto failed;
 872         }
 873
 874         return 0;
 875 failed:
 876         if (adapter->ring_vir_addr != NULL) {
 877                 pci_free_consistent(pdev, adapter->ring_size,
 878                                 adapter->ring_vir_addr, adapter->ring_dma);
 879                 adapter->ring_vir_addr = NULL;
 880         }
 881         return err;
 882 }
 883
 884 static inline void atl1e_configure_des_ring(const struct atl1e_adapter *adapter)
 885 {
 886
 887         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 888         struct atl1e_rx_ring *rx_ring =
 889                         (struct atl1e_rx_ring *)&adapter->rx_ring;
 890         struct atl1e_tx_ring *tx_ring =
 891                         (struct atl1e_tx_ring *)&adapter->tx_ring;
 892         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 893         int i, j;
 894
 895         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 896                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 897         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 898                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 899         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 900         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 901                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 902
 903         rx_page_desc = rx_ring->rx_page_desc;
 904         /* RXF Page Physical address / Page Length */
 905         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 906                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 907                                  (u32)((adapter->ring_dma &
 908                                  AT_DMA_HI_ADDR_MASK) >> 32));
 909                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 910                         u32 page_phy_addr;
 911                         u32 offset_phy_addr;
 912
 913                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 914                         offset_phy_addr =
 915                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 916
 917                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 918                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 919                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 920                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 921                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 922                 }
 923         }
 924         /* Page Length */
 925         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 926         /* Load all of base address above */
 927         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 928 }
 929
 930 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 931 {
 932         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 933         u32 dev_ctrl_data = 0;
 934         u32 max_pay_load = 0;
 935         u32 jumbo_thresh = 0;
 936         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 937
 938         /* configure TXQ param */
 939         if (hw->nic_type != athr_l2e_revB) {
 940                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 941                 if (hw->max_frame_size <= 1500) {
 942                         jumbo_thresh = hw->max_frame_size + extra_size;
 943                 } else if (hw->max_frame_size < 6*1024) {
 944                         jumbo_thresh =
 945                                 (hw->max_frame_size + extra_size) * 2 / 3;
 946                 } else {
 947                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 948                 }
 949                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 950         }
 951
 952         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 953
 954         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 955                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 956
 957         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 958
 959         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 960                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 961         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 962
 963         if (hw->nic_type != athr_l2e_revB)
 964                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 965                               atl1e_pay_load_size[hw->dmar_block]);
 966         /* enable TXQ */
 967         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 968                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 969                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 970                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 971 }
 972
 973 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 974 {
 975         struct atl1e_hw *hw = (struct atl1e_hw *)&adapter->hw;
 976         u32 rxf_len  = 0;
 977         u32 rxf_low  = 0;
 978         u32 rxf_high = 0;
 979         u32 rxf_thresh_data = 0;
 980         u32 rxq_ctrl_data = 0;
 981
 982         if (hw->nic_type != athr_l2e_revB) {
 983                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 984                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 985                               RXQ_JMBOSZ_TH_SHIFT |
 986                               (1 & RXQ_JMBO_LKAH_MASK) <<
 987                               RXQ_JMBO_LKAH_SHIFT));
 988
 989                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 990                 rxf_high = rxf_len * 4 / 5;
 991                 rxf_low  = rxf_len / 5;
 992                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 993                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 994                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 995                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 996
 997                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 998         }
 999
1000         /* RRS */
1001         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1002         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1003
1004         if (hw->rrs_type & atl1e_rrs_ipv4)
1005                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1006
1007         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1008                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1009
1010         if (hw->rrs_type & atl1e_rrs_ipv6)
1011                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1012
1013         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1014                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1015
1016         if (hw->rrs_type != atl1e_rrs_disable)
1017                 rxq_ctrl_data |=
1018                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1019
1020         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1021                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1022
1023         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1024 }
1025
1026 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1027 {
1028         struct atl1e_hw *hw = &adapter->hw;
1029         u32 dma_ctrl_data = 0;
1030
1031         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1032         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1033                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1034         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1035                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1036         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1037         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1038                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1039         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1040                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1041
1042         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1043 }
1044
1045 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1046 {
1047         u32 value;
1048         struct atl1e_hw *hw = &adapter->hw;
1049         struct net_device *netdev = adapter->netdev;
1050
1051         /* Config MAC CTRL Register */
1052         value = MAC_CTRL_TX_EN |
1053                 MAC_CTRL_RX_EN ;
1054
1055         if (FULL_DUPLEX == adapter->link_duplex)
1056                 value |= MAC_CTRL_DUPLX;
1057
1058         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1059                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1060                           MAC_CTRL_SPEED_SHIFT);
1061         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1062
1063         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1064         value |= (((u32)adapter->hw.preamble_len &
1065                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1066
1067         __atl1e_vlan_mode(netdev->features, &value);
1068
1069         value |= MAC_CTRL_BC_EN;
1070         if (netdev->flags & IFF_PROMISC)
1071                 value |= MAC_CTRL_PROMIS_EN;
1072         if (netdev->flags & IFF_ALLMULTI)
1073                 value |= MAC_CTRL_MC_ALL_EN;
1074
1075         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1076 }
1077
1078 /*
1079  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1080  * @adapter: board private structure
1081  *
1082  * Configure the Tx /Rx unit of the MAC after a reset.
1083  */
1084 static int atl1e_configure(struct atl1e_adapter *adapter)
1085 {
1086         struct atl1e_hw *hw = &adapter->hw;
1087
1088         u32 intr_status_data = 0;
1089
1090         /* clear interrupt status */
1091         AT_WRITE_REG(hw, REG_ISR, ~0);
1092
1093         /* 1. set MAC Address */
1094         atl1e_hw_set_mac_addr(hw);
1095
1096         /* 2. Init the Multicast HASH table done by set_muti */
1097
1098         /* 3. Clear any WOL status */
1099         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1100
1101         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1102          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1103          *    High 32bits memory */
1104         atl1e_configure_des_ring(adapter);
1105
1106         /* 5. set Interrupt Moderator Timer */
1107         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1108         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1109         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1110                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1111
1112         /* 6. rx/tx threshold to trig interrupt */
1113         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1114         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1115         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1116         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1117
1118         /* 7. set Interrupt Clear Timer */
1119         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1120
1121         /* 8. set MTU */
1122         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1123                         VLAN_HLEN + ETH_FCS_LEN);
1124
1125         /* 9. config TXQ early tx threshold */
1126         atl1e_configure_tx(adapter);
1127
1128         /* 10. config RXQ */
1129         atl1e_configure_rx(adapter);
1130
1131         /* 11. config  DMA Engine */
1132         atl1e_configure_dma(adapter);
1133
1134         /* 12. smb timer to trig interrupt */
1135         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1136
1137         intr_status_data = AT_READ_REG(hw, REG_ISR);
1138         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1139                 netdev_err(adapter->netdev,
1140                            "atl1e_configure failed, PCIE phy link down\n");
1141                 return -1;
1142         }
1143
1144         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1145         return 0;
1146 }
1147
1148 /*
1149  * atl1e_get_stats - Get System Network Statistics
1150  * @netdev: network interface device structure
1151  *
1152  * Returns the address of the device statistics structure.
1153  * The statistics are actually updated from the timer callback.
1154  */
1155 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1156 {
1157         struct atl1e_adapter *adapter = netdev_priv(netdev);
1158         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1159         struct net_device_stats *net_stats = &netdev->stats;
1160
1161         net_stats->rx_packets = hw_stats->rx_ok;
1162         net_stats->tx_packets = hw_stats->tx_ok;
1163         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1164         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1165         net_stats->multicast  = hw_stats->rx_mcast;
1166         net_stats->collisions = hw_stats->tx_1_col +
1167                                 hw_stats->tx_2_col * 2 +
1168                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1169
1170         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1171                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1172                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1173         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1174         net_stats->rx_length_errors = hw_stats->rx_len_err;
1175         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1176         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1177         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1178
1179         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1180
1181         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1182                                hw_stats->tx_underrun + hw_stats->tx_trunc;
1183         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1184         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1185         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1186
1187         return net_stats;
1188 }
1189
1190 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1191 {
1192         u16 hw_reg_addr = 0;
1193         unsigned long *stats_item = NULL;
1194
1195         /* update rx status */
1196         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1197         stats_item  = &adapter->hw_stats.rx_ok;
1198         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1199                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1200                 stats_item++;
1201                 hw_reg_addr += 4;
1202         }
1203         /* update tx status */
1204         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1205         stats_item  = &adapter->hw_stats.tx_ok;
1206         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1207                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1208                 stats_item++;
1209                 hw_reg_addr += 4;
1210         }
1211 }
1212
1213 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1214 {
1215         u16 phy_data;
1216
1217         spin_lock(&adapter->mdio_lock);
1218         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1219         spin_unlock(&adapter->mdio_lock);
1220 }
1221
1222 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1223 {
1224         struct atl1e_tx_ring *tx_ring = (struct atl1e_tx_ring *)
1225                                         &adapter->tx_ring;
1226         struct atl1e_tx_buffer *tx_buffer = NULL;
1227         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1228         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1229
1230         while (next_to_clean != hw_next_to_clean) {
1231                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1232                 if (tx_buffer->dma) {
1233                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1234                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1235                                         tx_buffer->length, PCI_DMA_TODEVICE);
1236                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1237                                 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1238                                         tx_buffer->length, PCI_DMA_TODEVICE);
1239                         tx_buffer->dma = 0;
1240                 }
1241
1242                 if (tx_buffer->skb) {
1243                         dev_kfree_skb_irq(tx_buffer->skb);
1244                         tx_buffer->skb = NULL;
1245                 }
1246
1247                 if (++next_to_clean == tx_ring->count)
1248                         next_to_clean = 0;
1249         }
1250
1251         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1252
1253         if (netif_queue_stopped(adapter->netdev) &&
1254                         netif_carrier_ok(adapter->netdev)) {
1255                 netif_wake_queue(adapter->netdev);
1256         }
1257
1258         return true;
1259 }
1260
1261 /*
1262  * atl1e_intr - Interrupt Handler
1263  * @irq: interrupt number
1264  * @data: pointer to a network interface device structure
1265  * @pt_regs: CPU registers structure
1266  */
1267 static irqreturn_t atl1e_intr(int irq, void *data)
1268 {
1269         struct net_device *netdev  = data;
1270         struct atl1e_adapter *adapter = netdev_priv(netdev);
1271         struct atl1e_hw *hw = &adapter->hw;
1272         int max_ints = AT_MAX_INT_WORK;
1273         int handled = IRQ_NONE;
1274         u32 status;
1275
1276         do {
1277                 status = AT_READ_REG(hw, REG_ISR);
1278                 if ((status & IMR_NORMAL_MASK) == 0 ||
1279                                 (status & ISR_DIS_INT) != 0) {
1280                         if (max_ints != AT_MAX_INT_WORK)
1281                                 handled = IRQ_HANDLED;
1282                         break;
1283                 }
1284                 /* link event */
1285                 if (status & ISR_GPHY)
1286                         atl1e_clear_phy_int(adapter);
1287                 /* Ack ISR */
1288                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1289
1290                 handled = IRQ_HANDLED;
1291                 /* check if PCIE PHY Link down */
1292                 if (status & ISR_PHY_LINKDOWN) {
1293                         netdev_err(adapter->netdev,
1294                                    "pcie phy linkdown %x\n", status);
1295                         if (netif_running(adapter->netdev)) {
1296                                 /* reset MAC */
1297                                 atl1e_irq_reset(adapter);
1298                                 schedule_work(&adapter->reset_task);
1299                                 break;
1300                         }
1301                 }
1302
1303                 /* check if DMA read/write error */
1304                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1305                         netdev_err(adapter->netdev,
1306                                    "PCIE DMA RW error (status = 0x%x)\n",
1307                                    status);
1308                         atl1e_irq_reset(adapter);
1309                         schedule_work(&adapter->reset_task);
1310                         break;
1311                 }
1312
1313                 if (status & ISR_SMB)
1314                         atl1e_update_hw_stats(adapter);
1315
1316                 /* link event */
1317                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1318                         netdev->stats.tx_carrier_errors++;
1319                         atl1e_link_chg_event(adapter);
1320                         break;
1321                 }
1322
1323                 /* transmit event */
1324                 if (status & ISR_TX_EVENT)
1325                         atl1e_clean_tx_irq(adapter);
1326
1327                 if (status & ISR_RX_EVENT) {
1328                         /*
1329                          * disable rx interrupts, without
1330                          * the synchronize_irq bit
1331                          */
1332                         AT_WRITE_REG(hw, REG_IMR,
1333                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1334                         AT_WRITE_FLUSH(hw);
1335                         if (likely(napi_schedule_prep(
1336                                    &adapter->napi)))
1337                                 __napi_schedule(&adapter->napi);
1338                 }
1339         } while (--max_ints > 0);
1340         /* re-enable Interrupt*/
1341         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1342
1343         return handled;
1344 }
1345
1346 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1347                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1348 {
1349         u8 *packet = (u8 *)(prrs + 1);
1350         struct iphdr *iph;
1351         u16 head_len = ETH_HLEN;
1352         u16 pkt_flags;
1353         u16 err_flags;
1354
1355         skb_checksum_none_assert(skb);
1356         pkt_flags = prrs->pkt_flag;
1357         err_flags = prrs->err_flag;
1358         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1359                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1360                 if (pkt_flags & RRS_IS_IPV4) {
1361                         if (pkt_flags & RRS_IS_802_3)
1362                                 head_len += 8;
1363                         iph = (struct iphdr *) (packet + head_len);
1364                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1365                                 goto hw_xsum;
1366                 }
1367                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1368                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1369                         return;
1370                 }
1371         }
1372
1373 hw_xsum :
1374         return;
1375 }
1376
1377 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1378                                                u8 que)
1379 {
1380         struct atl1e_rx_page_desc *rx_page_desc =
1381                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1382         u8 rx_using = rx_page_desc[que].rx_using;
1383
1384         return (struct atl1e_rx_page *)&(rx_page_desc[que].rx_page[rx_using]);
1385 }
1386
1387 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1388                    int *work_done, int work_to_do)
1389 {
1390         struct net_device *netdev  = adapter->netdev;
1391         struct atl1e_rx_ring *rx_ring = (struct atl1e_rx_ring *)
1392                                          &adapter->rx_ring;
1393         struct atl1e_rx_page_desc *rx_page_desc =
1394                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1395         struct sk_buff *skb = NULL;
1396         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1397         u32 packet_size, write_offset;
1398         struct atl1e_recv_ret_status *prrs;
1399
1400         write_offset = *(rx_page->write_offset_addr);
1401         if (likely(rx_page->read_offset < write_offset)) {
1402                 do {
1403                         if (*work_done >= work_to_do)
1404                                 break;
1405                         (*work_done)++;
1406                         /* get new packet's  rrs */
1407                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1408                                                  rx_page->read_offset);
1409                         /* check sequence number */
1410                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1411                                 netdev_err(netdev,
1412                                            "rx sequence number error (rx=%d) (expect=%d)\n",
1413                                            prrs->seq_num,
1414                                            rx_page_desc[que].rx_nxseq);
1415                                 rx_page_desc[que].rx_nxseq++;
1416                                 /* just for debug use */
1417                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1418                                              (((u32)prrs->seq_num) << 16) |
1419                                              rx_page_desc[que].rx_nxseq);
1420                                 goto fatal_err;
1421                         }
1422                         rx_page_desc[que].rx_nxseq++;
1423
1424                         /* error packet */
1425                         if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
1426                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1427                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1428                                         RRS_ERR_TRUNC)) {
1429                                 /* hardware error, discard this packet*/
1430                                         netdev_err(netdev,
1431                                                    "rx packet desc error %x\n",
1432                                                    *((u32 *)prrs + 1));
1433                                         goto skip_pkt;
1434                                 }
1435                         }
1436
1437                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1438                                         RRS_PKT_SIZE_MASK) - 4; /* CRC */
1439                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1440                         if (skb == NULL) {
1441                                 netdev_warn(netdev,
1442                                             "Memory squeeze, deferring packet\n");
1443                                 goto skip_pkt;
1444                         }
1445                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1446                         skb_put(skb, packet_size);
1447                         skb->protocol = eth_type_trans(skb, netdev);
1448                         atl1e_rx_checksum(adapter, skb, prrs);
1449
1450                         if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1451                                 u16 vlan_tag = (prrs->vtag >> 4) |
1452                                                ((prrs->vtag & 7) << 13) |
1453                                                ((prrs->vtag & 8) << 9);
1454                                 netdev_dbg(netdev,
1455                                            "RXD VLAN TAG<RRD>=0x%04x\n",
1456                                            prrs->vtag);
1457                                 __vlan_hwaccel_put_tag(skb, vlan_tag);
1458                         }
1459                         netif_receive_skb(skb);
1460
1461 skip_pkt:
1462         /* skip current packet whether it's ok or not. */
1463                         rx_page->read_offset +=
1464                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1465                                 RRS_PKT_SIZE_MASK) +
1466                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1467                                                 0xFFFFFFE0);
1468
1469                         if (rx_page->read_offset >= rx_ring->page_size) {
1470                                 /* mark this page clean */
1471                                 u16 reg_addr;
1472                                 u8  rx_using;
1473
1474                                 rx_page->read_offset =
1475                                         *(rx_page->write_offset_addr) = 0;
1476                                 rx_using = rx_page_desc[que].rx_using;
1477                                 reg_addr =
1478                                         atl1e_rx_page_vld_regs[que][rx_using];
1479                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1480                                 rx_page_desc[que].rx_using ^= 1;
1481                                 rx_page = atl1e_get_rx_page(adapter, que);
1482                         }
1483                         write_offset = *(rx_page->write_offset_addr);
1484                 } while (rx_page->read_offset < write_offset);
1485         }
1486
1487         return;
1488
1489 fatal_err:
1490         if (!test_bit(__AT_DOWN, &adapter->flags))
1491                 schedule_work(&adapter->reset_task);
1492 }
1493
1494 /*
1495  * atl1e_clean - NAPI Rx polling callback
1496  * @adapter: board private structure
1497  */
1498 static int atl1e_clean(struct napi_struct *napi, int budget)
1499 {
1500         struct atl1e_adapter *adapter =
1501                         container_of(napi, struct atl1e_adapter, napi);
1502         u32 imr_data;
1503         int work_done = 0;
1504
1505         /* Keep link state information with original netdev */
1506         if (!netif_carrier_ok(adapter->netdev))
1507                 goto quit_polling;
1508
1509         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1510
1511         /* If no Tx and not enough Rx work done, exit the polling mode */
1512         if (work_done < budget) {
1513 quit_polling:
1514                 napi_complete(napi);
1515                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1516                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1517                 /* test debug */
1518                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1519                         atomic_dec(&adapter->irq_sem);
1520                         netdev_err(adapter->netdev,
1521                                    "atl1e_clean is called when AT_DOWN\n");
1522                 }
1523                 /* reenable RX intr */
1524                 /*atl1e_irq_enable(adapter); */
1525
1526         }
1527         return work_done;
1528 }
1529
1530 #ifdef CONFIG_NET_POLL_CONTROLLER
1531
1532 /*
1533  * Polling 'interrupt' - used by things like netconsole to send skbs
1534  * without having to re-enable interrupts. It's not called while
1535  * the interrupt routine is executing.
1536  */
1537 static void atl1e_netpoll(struct net_device *netdev)
1538 {
1539         struct atl1e_adapter *adapter = netdev_priv(netdev);
1540
1541         disable_irq(adapter->pdev->irq);
1542         atl1e_intr(adapter->pdev->irq, netdev);
1543         enable_irq(adapter->pdev->irq);
1544 }
1545 #endif
1546
1547 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1548 {
1549         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1550         u16 next_to_use = 0;
1551         u16 next_to_clean = 0;
1552
1553         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1554         next_to_use   = tx_ring->next_to_use;
1555
1556         return (u16)(next_to_clean > next_to_use) ?
1557                 (next_to_clean - next_to_use - 1) :
1558                 (tx_ring->count + next_to_clean - next_to_use - 1);
1559 }
1560
1561 /*
1562  * get next usable tpd
1563  * Note: should call atl1e_tdp_avail to make sure
1564  * there is enough tpd to use
1565  */
1566 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1567 {
1568         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1569         u16 next_to_use = 0;
1570
1571         next_to_use = tx_ring->next_to_use;
1572         if (++tx_ring->next_to_use == tx_ring->count)
1573                 tx_ring->next_to_use = 0;
1574
1575         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1576         return (struct atl1e_tpd_desc *)&tx_ring->desc[next_to_use];
1577 }
1578
1579 static struct atl1e_tx_buffer *
1580 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1581 {
1582         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1583
1584         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1585 }
1586
1587 /* Calculate the transmit packet descript needed*/
1588 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1589 {
1590         int i = 0;
1591         u16 tpd_req = 1;
1592         u16 fg_size = 0;
1593         u16 proto_hdr_len = 0;
1594
1595         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1596                 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1597                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1598         }
1599
1600         if (skb_is_gso(skb)) {
1601                 if (skb->protocol == htons(ETH_P_IP) ||
1602                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1603                         proto_hdr_len = skb_transport_offset(skb) +
1604                                         tcp_hdrlen(skb);
1605                         if (proto_hdr_len < skb_headlen(skb)) {
1606                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1607                                            MAX_TX_BUF_LEN - 1) >>
1608                                            MAX_TX_BUF_SHIFT);
1609                         }
1610                 }
1611
1612         }
1613         return tpd_req;
1614 }
1615
1616 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1617                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1618 {
1619         u8 hdr_len;
1620         u32 real_len;
1621         unsigned short offload_type;
1622         int err;
1623
1624         if (skb_is_gso(skb)) {
1625                 if (skb_header_cloned(skb)) {
1626                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1627                         if (unlikely(err))
1628                                 return -1;
1629                 }
1630                 offload_type = skb_shinfo(skb)->gso_type;
1631
1632                 if (offload_type & SKB_GSO_TCPV4) {
1633                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1634                                         + ntohs(ip_hdr(skb)->tot_len));
1635
1636                         if (real_len < skb->len)
1637                                 pskb_trim(skb, real_len);
1638
1639                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1640                         if (unlikely(skb->len == hdr_len)) {
1641                                 /* only xsum need */
1642                                 netdev_warn(adapter->netdev,
1643                                             "IPV4 tso with zero data??\n");
1644                                 goto check_sum;
1645                         } else {
1646                                 ip_hdr(skb)->check = 0;
1647                                 ip_hdr(skb)->tot_len = 0;
1648                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1649                                                         ip_hdr(skb)->saddr,
1650                                                         ip_hdr(skb)->daddr,
1651                                                         0, IPPROTO_TCP, 0);
1652                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1653                                         TDP_V4_IPHL_MASK) <<
1654                                         TPD_V4_IPHL_SHIFT;
1655                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1656                                         TPD_TCPHDRLEN_MASK) <<
1657                                         TPD_TCPHDRLEN_SHIFT;
1658                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1659                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1660                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1661                         }
1662                         return 0;
1663                 }
1664         }
1665
1666 check_sum:
1667         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1668                 u8 css, cso;
1669
1670                 cso = skb_checksum_start_offset(skb);
1671                 if (unlikely(cso & 0x1)) {
1672                         netdev_err(adapter->netdev,
1673                                    "payload offset should not ant event number\n");
1674                         return -1;
1675                 } else {
1676                         css = cso + skb->csum_offset;
1677                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1678                                         TPD_PLOADOFFSET_SHIFT;
1679                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1680                                         TPD_CCSUMOFFSET_SHIFT;
1681                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1682                 }
1683         }
1684
1685         return 0;
1686 }
1687
1688 static int atl1e_tx_map(struct atl1e_adapter *adapter,
1689                         struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1690 {
1691         struct atl1e_tpd_desc *use_tpd = NULL;
1692         struct atl1e_tx_buffer *tx_buffer = NULL;
1693         u16 buf_len = skb_headlen(skb);
1694         u16 map_len = 0;
1695         u16 mapped_len = 0;
1696         u16 hdr_len = 0;
1697         u16 nr_frags;
1698         u16 f;
1699         int segment;
1700         int ring_start = adapter->tx_ring.next_to_use;
1701         int ring_end;
1702
1703         nr_frags = skb_shinfo(skb)->nr_frags;
1704         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1705         if (segment) {
1706                 /* TSO */
1707                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1708                 use_tpd = tpd;
1709
1710                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1711                 tx_buffer->length = map_len;
1712                 tx_buffer->dma = pci_map_single(adapter->pdev,
1713                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1714                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1715                         return -ENOSPC;
1716
1717                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1718                 mapped_len += map_len;
1719                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1720                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1721                         ((cpu_to_le32(tx_buffer->length) &
1722                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1723         }
1724
1725         while (mapped_len < buf_len) {
1726                 /* mapped_len == 0, means we should use the first tpd,
1727                    which is given by caller  */
1728                 if (mapped_len == 0) {
1729                         use_tpd = tpd;
1730                 } else {
1731                         use_tpd = atl1e_get_tpd(adapter);
1732                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1733                 }
1734                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1735                 tx_buffer->skb = NULL;
1736
1737                 tx_buffer->length = map_len =
1738                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1739                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1740                 tx_buffer->dma =
1741                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1742                                         map_len, PCI_DMA_TODEVICE);
1743
1744                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1745                         /* We need to unwind the mappings we've done */
1746                         ring_end = adapter->tx_ring.next_to_use;
1747                         adapter->tx_ring.next_to_use = ring_start;
1748                         while (adapter->tx_ring.next_to_use != ring_end) {
1749                                 tpd = atl1e_get_tpd(adapter);
1750                                 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1751                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1752                                                  tx_buffer->length, PCI_DMA_TODEVICE);
1753                         }
1754                         /* Reset the tx rings next pointer */
1755                         adapter->tx_ring.next_to_use = ring_start;
1756                         return -ENOSPC;
1757                 }
1758
1759                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1760                 mapped_len  += map_len;
1761                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1762                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1763                         ((cpu_to_le32(tx_buffer->length) &
1764                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1765         }
1766
1767         for (f = 0; f < nr_frags; f++) {
1768                 const struct skb_frag_struct *frag;
1769                 u16 i;
1770                 u16 seg_num;
1771
1772                 frag = &skb_shinfo(skb)->frags[f];
1773                 buf_len = skb_frag_size(frag);
1774
1775                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1776                 for (i = 0; i < seg_num; i++) {
1777                         use_tpd = atl1e_get_tpd(adapter);
1778                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1779
1780                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1781                         BUG_ON(tx_buffer->skb);
1782
1783                         tx_buffer->skb = NULL;
1784                         tx_buffer->length =
1785                                 (buf_len > MAX_TX_BUF_LEN) ?
1786                                 MAX_TX_BUF_LEN : buf_len;
1787                         buf_len -= tx_buffer->length;
1788
1789                         tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1790                                                           frag,
1791                                                           (i * MAX_TX_BUF_LEN),
1792                                                           tx_buffer->length,
1793                                                           DMA_TO_DEVICE);
1794
1795                         if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1796                                 /* We need to unwind the mappings we've done */
1797                                 ring_end = adapter->tx_ring.next_to_use;
1798                                 adapter->tx_ring.next_to_use = ring_start;
1799                                 while (adapter->tx_ring.next_to_use != ring_end) {
1800                                         tpd = atl1e_get_tpd(adapter);
1801                                         tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1802                                         dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1803                                                        tx_buffer->length, DMA_TO_DEVICE);
1804                                 }
1805
1806                                 /* Reset the ring next to use pointer */
1807                                 adapter->tx_ring.next_to_use = ring_start;
1808                                 return -ENOSPC;
1809                         }
1810
1811                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1812                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1813                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1814                                         ((cpu_to_le32(tx_buffer->length) &
1815                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1816                 }
1817         }
1818
1819         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1820                 /* note this one is a tcp header */
1821                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1822         /* The last tpd */
1823
1824         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1825         /* The last buffer info contain the skb address,
1826            so it will be free after unmap */
1827         tx_buffer->skb = skb;
1828         return 0;
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 (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         if (atl1e_tx_map(adapter, skb, tpd)) {
1897                 dev_kfree_skb_any(skb);
1898                 goto out;
1899         }
1900
1901         atl1e_tx_queue(adapter, tpd_req, tpd);
1902
1903         netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1904 out:
1905         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1906         return NETDEV_TX_OK;
1907 }
1908
1909 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1910 {
1911         struct net_device *netdev = adapter->netdev;
1912
1913         free_irq(adapter->pdev->irq, netdev);
1914 }
1915
1916 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1917 {
1918         struct pci_dev    *pdev   = adapter->pdev;
1919         struct net_device *netdev = adapter->netdev;
1920         int err = 0;
1921
1922         err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED,
1923                           netdev->name, netdev);
1924         if (err) {
1925                 netdev_dbg(adapter->netdev,
1926                            "Unable to allocate interrupt Error: %d\n", err);
1927                 return err;
1928         }
1929         netdev_dbg(adapter->netdev, "atl1e_request_irq OK\n");
1930         return err;
1931 }
1932
1933 int atl1e_up(struct atl1e_adapter *adapter)
1934 {
1935         struct net_device *netdev = adapter->netdev;
1936         int err = 0;
1937         u32 val;
1938
1939         /* hardware has been reset, we need to reload some things */
1940         err = atl1e_init_hw(&adapter->hw);
1941         if (err) {
1942                 err = -EIO;
1943                 return err;
1944         }
1945         atl1e_init_ring_ptrs(adapter);
1946         atl1e_set_multi(netdev);
1947         atl1e_restore_vlan(adapter);
1948
1949         if (atl1e_configure(adapter)) {
1950                 err = -EIO;
1951                 goto err_up;
1952         }
1953
1954         clear_bit(__AT_DOWN, &adapter->flags);
1955         napi_enable(&adapter->napi);
1956         atl1e_irq_enable(adapter);
1957         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1958         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1959                       val | MASTER_CTRL_MANUAL_INT);
1960
1961 err_up:
1962         return err;
1963 }
1964
1965 void atl1e_down(struct atl1e_adapter *adapter)
1966 {
1967         struct net_device *netdev = adapter->netdev;
1968
1969         /* signal that we're down so the interrupt handler does not
1970          * reschedule our watchdog timer */
1971         set_bit(__AT_DOWN, &adapter->flags);
1972
1973         netif_stop_queue(netdev);
1974
1975         /* reset MAC to disable all RX/TX */
1976         atl1e_reset_hw(&adapter->hw);
1977         msleep(1);
1978
1979         napi_disable(&adapter->napi);
1980         atl1e_del_timer(adapter);
1981         atl1e_irq_disable(adapter);
1982
1983         netif_carrier_off(netdev);
1984         adapter->link_speed = SPEED_0;
1985         adapter->link_duplex = -1;
1986         atl1e_clean_tx_ring(adapter);
1987         atl1e_clean_rx_ring(adapter);
1988 }
1989
1990 /*
1991  * atl1e_open - Called when a network interface is made active
1992  * @netdev: network interface device structure
1993  *
1994  * Returns 0 on success, negative value on failure
1995  *
1996  * The open entry point is called when a network interface is made
1997  * active by the system (IFF_UP).  At this point all resources needed
1998  * for transmit and receive operations are allocated, the interrupt
1999  * handler is registered with the OS, the watchdog timer is started,
2000  * and the stack is notified that the interface is ready.
2001  */
2002 static int atl1e_open(struct net_device *netdev)
2003 {
2004         struct atl1e_adapter *adapter = netdev_priv(netdev);
2005         int err;
2006
2007         /* disallow open during test */
2008         if (test_bit(__AT_TESTING, &adapter->flags))
2009                 return -EBUSY;
2010
2011         /* allocate rx/tx dma buffer & descriptors */
2012         atl1e_init_ring_resources(adapter);
2013         err = atl1e_setup_ring_resources(adapter);
2014         if (unlikely(err))
2015                 return err;
2016
2017         err = atl1e_request_irq(adapter);
2018         if (unlikely(err))
2019                 goto err_req_irq;
2020
2021         err = atl1e_up(adapter);
2022         if (unlikely(err))
2023                 goto err_up;
2024
2025         return 0;
2026
2027 err_up:
2028         atl1e_free_irq(adapter);
2029 err_req_irq:
2030         atl1e_free_ring_resources(adapter);
2031         atl1e_reset_hw(&adapter->hw);
2032
2033         return err;
2034 }
2035
2036 /*
2037  * atl1e_close - Disables a network interface
2038  * @netdev: network interface device structure
2039  *
2040  * Returns 0, this is not allowed to fail
2041  *
2042  * The close entry point is called when an interface is de-activated
2043  * by the OS.  The hardware is still under the drivers control, but
2044  * needs to be disabled.  A global MAC reset is issued to stop the
2045  * hardware, and all transmit and receive resources are freed.
2046  */
2047 static int atl1e_close(struct net_device *netdev)
2048 {
2049         struct atl1e_adapter *adapter = netdev_priv(netdev);
2050
2051         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2052         atl1e_down(adapter);
2053         atl1e_free_irq(adapter);
2054         atl1e_free_ring_resources(adapter);
2055
2056         return 0;
2057 }
2058
2059 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2060 {
2061         struct net_device *netdev = pci_get_drvdata(pdev);
2062         struct atl1e_adapter *adapter = netdev_priv(netdev);
2063         struct atl1e_hw *hw = &adapter->hw;
2064         u32 ctrl = 0;
2065         u32 mac_ctrl_data = 0;
2066         u32 wol_ctrl_data = 0;
2067         u16 mii_advertise_data = 0;
2068         u16 mii_bmsr_data = 0;
2069         u16 mii_intr_status_data = 0;
2070         u32 wufc = adapter->wol;
2071         u32 i;
2072 #ifdef CONFIG_PM
2073         int retval = 0;
2074 #endif
2075
2076         if (netif_running(netdev)) {
2077                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2078                 atl1e_down(adapter);
2079         }
2080         netif_device_detach(netdev);
2081
2082 #ifdef CONFIG_PM
2083         retval = pci_save_state(pdev);
2084         if (retval)
2085                 return retval;
2086 #endif
2087
2088         if (wufc) {
2089                 /* get link status */
2090                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2091                 atl1e_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2092
2093                 mii_advertise_data = ADVERTISE_10HALF;
2094
2095                 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2096                     (atl1e_write_phy_reg(hw,
2097                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2098                     (atl1e_phy_commit(hw)) != 0) {
2099                         netdev_dbg(adapter->netdev, "set phy register failed\n");
2100                         goto wol_dis;
2101                 }
2102
2103                 hw->phy_configured = false; /* re-init PHY when resume */
2104
2105                 /* turn on magic packet wol */
2106                 if (wufc & AT_WUFC_MAG)
2107                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2108
2109                 if (wufc & AT_WUFC_LNKC) {
2110                 /* if orignal link status is link, just wait for retrive link */
2111                         if (mii_bmsr_data & BMSR_LSTATUS) {
2112                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2113                                         msleep(100);
2114                                         atl1e_read_phy_reg(hw, MII_BMSR,
2115                                                         (u16 *)&mii_bmsr_data);
2116                                         if (mii_bmsr_data & BMSR_LSTATUS)
2117                                                 break;
2118                                 }
2119
2120                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2121                                         netdev_dbg(adapter->netdev,
2122                                                    "Link may change when suspend\n");
2123                         }
2124                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2125                         /* only link up can wake up */
2126                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2127                                 netdev_dbg(adapter->netdev,
2128                                            "read write phy register failed\n");
2129                                 goto wol_dis;
2130                         }
2131                 }
2132                 /* clear phy interrupt */
2133                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2134                 /* Config MAC Ctrl register */
2135                 mac_ctrl_data = MAC_CTRL_RX_EN;
2136                 /* set to 10/100M halt duplex */
2137                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2138                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2139                                  MAC_CTRL_PRMLEN_MASK) <<
2140                                  MAC_CTRL_PRMLEN_SHIFT);
2141
2142                 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2143
2144                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2145                 if (wufc & AT_WUFC_MAG)
2146                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2147
2148                 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2149                            mac_ctrl_data);
2150
2151                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2152                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2153                 /* pcie patch */
2154                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2155                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2156                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2157                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2158                 goto suspend_exit;
2159         }
2160 wol_dis:
2161
2162         /* WOL disabled */
2163         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2164
2165         /* pcie patch */
2166         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2167         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2168         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2169
2170         atl1e_force_ps(hw);
2171         hw->phy_configured = false; /* re-init PHY when resume */
2172
2173         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2174
2175 suspend_exit:
2176
2177         if (netif_running(netdev))
2178                 atl1e_free_irq(adapter);
2179
2180         pci_disable_device(pdev);
2181
2182         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2183
2184         return 0;
2185 }
2186
2187 #ifdef CONFIG_PM
2188 static int atl1e_resume(struct pci_dev *pdev)
2189 {
2190         struct net_device *netdev = pci_get_drvdata(pdev);
2191         struct atl1e_adapter *adapter = netdev_priv(netdev);
2192         u32 err;
2193
2194         pci_set_power_state(pdev, PCI_D0);
2195         pci_restore_state(pdev);
2196
2197         err = pci_enable_device(pdev);
2198         if (err) {
2199                 netdev_err(adapter->netdev,
2200                            "Cannot enable PCI device from suspend\n");
2201                 return err;
2202         }
2203
2204         pci_set_master(pdev);
2205
2206         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2207
2208         pci_enable_wake(pdev, PCI_D3hot, 0);
2209         pci_enable_wake(pdev, PCI_D3cold, 0);
2210
2211         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2212
2213         if (netif_running(netdev)) {
2214                 err = atl1e_request_irq(adapter);
2215                 if (err)
2216                         return err;
2217         }
2218
2219         atl1e_reset_hw(&adapter->hw);
2220
2221         if (netif_running(netdev))
2222                 atl1e_up(adapter);
2223
2224         netif_device_attach(netdev);
2225
2226         return 0;
2227 }
2228 #endif
2229
2230 static void atl1e_shutdown(struct pci_dev *pdev)
2231 {
2232         atl1e_suspend(pdev, PMSG_SUSPEND);
2233 }
2234
2235 static const struct net_device_ops atl1e_netdev_ops = {
2236         .ndo_open               = atl1e_open,
2237         .ndo_stop               = atl1e_close,
2238         .ndo_start_xmit         = atl1e_xmit_frame,
2239         .ndo_get_stats          = atl1e_get_stats,
2240         .ndo_set_rx_mode        = atl1e_set_multi,
2241         .ndo_validate_addr      = eth_validate_addr,
2242         .ndo_set_mac_address    = atl1e_set_mac_addr,
2243         .ndo_fix_features       = atl1e_fix_features,
2244         .ndo_set_features       = atl1e_set_features,
2245         .ndo_change_mtu         = atl1e_change_mtu,
2246         .ndo_do_ioctl           = atl1e_ioctl,
2247         .ndo_tx_timeout         = atl1e_tx_timeout,
2248 #ifdef CONFIG_NET_POLL_CONTROLLER
2249         .ndo_poll_controller    = atl1e_netpoll,
2250 #endif
2251
2252 };
2253
2254 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2255 {
2256         SET_NETDEV_DEV(netdev, &pdev->dev);
2257         pci_set_drvdata(pdev, netdev);
2258
2259         netdev->irq  = pdev->irq;
2260         netdev->netdev_ops = &atl1e_netdev_ops;
2261
2262         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2263         atl1e_set_ethtool_ops(netdev);
2264
2265         netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2266                               NETIF_F_HW_VLAN_RX;
2267         netdev->features = netdev->hw_features | NETIF_F_LLTX |
2268                            NETIF_F_HW_VLAN_TX;
2269
2270         return 0;
2271 }
2272
2273 /*
2274  * atl1e_probe - Device Initialization Routine
2275  * @pdev: PCI device information struct
2276  * @ent: entry in atl1e_pci_tbl
2277  *
2278  * Returns 0 on success, negative on failure
2279  *
2280  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2281  * The OS initialization, configuring of the adapter private structure,
2282  * and a hardware reset occur.
2283  */
2284 static int __devinit atl1e_probe(struct pci_dev *pdev,
2285                                  const struct pci_device_id *ent)
2286 {
2287         struct net_device *netdev;
2288         struct atl1e_adapter *adapter = NULL;
2289         static int cards_found;
2290
2291         int err = 0;
2292
2293         err = pci_enable_device(pdev);
2294         if (err) {
2295                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2296                 return err;
2297         }
2298
2299         /*
2300          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2301          * shared register for the high 32 bits, so only a single, aligned,
2302          * 4 GB physical address range can be used at a time.
2303          *
2304          * Supporting 64-bit DMA on this hardware is more trouble than it's
2305          * worth.  It is far easier to limit to 32-bit DMA than update
2306          * various kernel subsystems to support the mechanics required by a
2307          * fixed-high-32-bit system.
2308          */
2309         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2310             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2311                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2312                 goto err_dma;
2313         }
2314
2315         err = pci_request_regions(pdev, atl1e_driver_name);
2316         if (err) {
2317                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2318                 goto err_pci_reg;
2319         }
2320
2321         pci_set_master(pdev);
2322
2323         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2324         if (netdev == NULL) {
2325                 err = -ENOMEM;
2326                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2327                 goto err_alloc_etherdev;
2328         }
2329
2330         err = atl1e_init_netdev(netdev, pdev);
2331         if (err) {
2332                 netdev_err(netdev, "init netdevice failed\n");
2333                 goto err_init_netdev;
2334         }
2335         adapter = netdev_priv(netdev);
2336         adapter->bd_number = cards_found;
2337         adapter->netdev = netdev;
2338         adapter->pdev = pdev;
2339         adapter->hw.adapter = adapter;
2340         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2341         if (!adapter->hw.hw_addr) {
2342                 err = -EIO;
2343                 netdev_err(netdev, "cannot map device registers\n");
2344                 goto err_ioremap;
2345         }
2346         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2347
2348         /* init mii data */
2349         adapter->mii.dev = netdev;
2350         adapter->mii.mdio_read  = atl1e_mdio_read;
2351         adapter->mii.mdio_write = atl1e_mdio_write;
2352         adapter->mii.phy_id_mask = 0x1f;
2353         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2354
2355         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2356
2357         init_timer(&adapter->phy_config_timer);
2358         adapter->phy_config_timer.function = atl1e_phy_config;
2359         adapter->phy_config_timer.data = (unsigned long) adapter;
2360
2361         /* get user settings */
2362         atl1e_check_options(adapter);
2363         /*
2364          * Mark all PCI regions associated with PCI device
2365          * pdev as being reserved by owner atl1e_driver_name
2366          * Enables bus-mastering on the device and calls
2367          * pcibios_set_master to do the needed arch specific settings
2368          */
2369         atl1e_setup_pcicmd(pdev);
2370         /* setup the private structure */
2371         err = atl1e_sw_init(adapter);
2372         if (err) {
2373                 netdev_err(netdev, "net device private data init failed\n");
2374                 goto err_sw_init;
2375         }
2376
2377         /* Init GPHY as early as possible due to power saving issue  */
2378         atl1e_phy_init(&adapter->hw);
2379         /* reset the controller to
2380          * put the device in a known good starting state */
2381         err = atl1e_reset_hw(&adapter->hw);
2382         if (err) {
2383                 err = -EIO;
2384                 goto err_reset;
2385         }
2386
2387         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2388                 err = -EIO;
2389                 netdev_err(netdev, "get mac address failed\n");
2390                 goto err_eeprom;
2391         }
2392
2393         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2394         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2395         netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2396
2397         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2398         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2399         netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2400         err = register_netdev(netdev);
2401         if (err) {
2402                 netdev_err(netdev, "register netdevice failed\n");
2403                 goto err_register;
2404         }
2405
2406         /* assume we have no link for now */
2407         netif_stop_queue(netdev);
2408         netif_carrier_off(netdev);
2409
2410         cards_found++;
2411
2412         return 0;
2413
2414 err_reset:
2415 err_register:
2416 err_sw_init:
2417 err_eeprom:
2418         iounmap(adapter->hw.hw_addr);
2419 err_init_netdev:
2420 err_ioremap:
2421         free_netdev(netdev);
2422 err_alloc_etherdev:
2423         pci_release_regions(pdev);
2424 err_pci_reg:
2425 err_dma:
2426         pci_disable_device(pdev);
2427         return err;
2428 }
2429
2430 /*
2431  * atl1e_remove - Device Removal Routine
2432  * @pdev: PCI device information struct
2433  *
2434  * atl1e_remove is called by the PCI subsystem to alert the driver
2435  * that it should release a PCI device.  The could be caused by a
2436  * Hot-Plug event, or because the driver is going to be removed from
2437  * memory.
2438  */
2439 static void __devexit atl1e_remove(struct pci_dev *pdev)
2440 {
2441         struct net_device *netdev = pci_get_drvdata(pdev);
2442         struct atl1e_adapter *adapter = netdev_priv(netdev);
2443
2444         /*
2445          * flush_scheduled work may reschedule our watchdog task, so
2446          * explicitly disable watchdog tasks from being rescheduled
2447          */
2448         set_bit(__AT_DOWN, &adapter->flags);
2449
2450         atl1e_del_timer(adapter);
2451         atl1e_cancel_work(adapter);
2452
2453         unregister_netdev(netdev);
2454         atl1e_free_ring_resources(adapter);
2455         atl1e_force_ps(&adapter->hw);
2456         iounmap(adapter->hw.hw_addr);
2457         pci_release_regions(pdev);
2458         free_netdev(netdev);
2459         pci_disable_device(pdev);
2460 }
2461
2462 /*
2463  * atl1e_io_error_detected - called when PCI error is detected
2464  * @pdev: Pointer to PCI device
2465  * @state: The current pci connection state
2466  *
2467  * This function is called after a PCI bus error affecting
2468  * this device has been detected.
2469  */
2470 static pci_ers_result_t
2471 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2472 {
2473         struct net_device *netdev = pci_get_drvdata(pdev);
2474         struct atl1e_adapter *adapter = netdev_priv(netdev);
2475
2476         netif_device_detach(netdev);
2477
2478         if (state == pci_channel_io_perm_failure)
2479                 return PCI_ERS_RESULT_DISCONNECT;
2480
2481         if (netif_running(netdev))
2482                 atl1e_down(adapter);
2483
2484         pci_disable_device(pdev);
2485
2486         /* Request a slot slot reset. */
2487         return PCI_ERS_RESULT_NEED_RESET;
2488 }
2489
2490 /*
2491  * atl1e_io_slot_reset - called after the pci bus has been reset.
2492  * @pdev: Pointer to PCI device
2493  *
2494  * Restart the card from scratch, as if from a cold-boot. Implementation
2495  * resembles the first-half of the e1000_resume routine.
2496  */
2497 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2498 {
2499         struct net_device *netdev = pci_get_drvdata(pdev);
2500         struct atl1e_adapter *adapter = netdev_priv(netdev);
2501
2502         if (pci_enable_device(pdev)) {
2503                 netdev_err(adapter->netdev,
2504                            "Cannot re-enable PCI device after reset\n");
2505                 return PCI_ERS_RESULT_DISCONNECT;
2506         }
2507         pci_set_master(pdev);
2508
2509         pci_enable_wake(pdev, PCI_D3hot, 0);
2510         pci_enable_wake(pdev, PCI_D3cold, 0);
2511
2512         atl1e_reset_hw(&adapter->hw);
2513
2514         return PCI_ERS_RESULT_RECOVERED;
2515 }
2516
2517 /*
2518  * atl1e_io_resume - called when traffic can start flowing again.
2519  * @pdev: Pointer to PCI device
2520  *
2521  * This callback is called when the error recovery driver tells us that
2522  * its OK to resume normal operation. Implementation resembles the
2523  * second-half of the atl1e_resume routine.
2524  */
2525 static void atl1e_io_resume(struct pci_dev *pdev)
2526 {
2527         struct net_device *netdev = pci_get_drvdata(pdev);
2528         struct atl1e_adapter *adapter = netdev_priv(netdev);
2529
2530         if (netif_running(netdev)) {
2531                 if (atl1e_up(adapter)) {
2532                         netdev_err(adapter->netdev,
2533                                    "can't bring device back up after reset\n");
2534                         return;
2535                 }
2536         }
2537
2538         netif_device_attach(netdev);
2539 }
2540
2541 static struct pci_error_handlers atl1e_err_handler = {
2542         .error_detected = atl1e_io_error_detected,
2543         .slot_reset = atl1e_io_slot_reset,
2544         .resume = atl1e_io_resume,
2545 };
2546
2547 static struct pci_driver atl1e_driver = {
2548         .name     = atl1e_driver_name,
2549         .id_table = atl1e_pci_tbl,
2550         .probe    = atl1e_probe,
2551         .remove   = __devexit_p(atl1e_remove),
2552         /* Power Management Hooks */
2553 #ifdef CONFIG_PM
2554         .suspend  = atl1e_suspend,
2555         .resume   = atl1e_resume,
2556 #endif
2557         .shutdown = atl1e_shutdown,
2558         .err_handler = &atl1e_err_handler
2559 };
2560
2561 /*
2562  * atl1e_init_module - Driver Registration Routine
2563  *
2564  * atl1e_init_module is the first routine called when the driver is
2565  * loaded. All it does is register with the PCI subsystem.
2566  */
2567 static int __init atl1e_init_module(void)
2568 {
2569         return pci_register_driver(&atl1e_driver);
2570 }
2571
2572 /*
2573  * atl1e_exit_module - Driver Exit Cleanup Routine
2574  *
2575  * atl1e_exit_module is called just before the driver is removed
2576  * from memory.
2577  */
2578 static void __exit atl1e_exit_module(void)
2579 {
2580         pci_unregister_driver(&atl1e_driver);
2581 }
2582
2583 module_init(atl1e_init_module);
2584 module_exit(atl1e_exit_module);