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

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