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

   1 /*
   2  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1e.h"
  23
  24 #define DRV_VERSION "1.0.0.7-NAPI"
  25
  26 char atl1e_driver_name[] = "ATL1E";
  27 char atl1e_driver_version[] = DRV_VERSION;
  28 #define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
  29 /*
  30  * atl1e_pci_tbl - PCI Device ID Table
  31  *
  32  * Wildcard entries (PCI_ANY_ID) should come last
  33  * Last entry must be all 0s
  34  *
  35  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  36  *   Class, Class Mask, private data (not used) }
  37  */
  38 static DEFINE_PCI_DEVICE_TABLE(atl1e_pci_tbl) = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  45
  46 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(DRV_VERSION);
  50
  51 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  52
  53 static const u16
  54 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  55 {
  56         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  57         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  58         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  59         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  60 };
  61
  62 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  63 {
  64         REG_RXF0_BASE_ADDR_HI,
  65         REG_RXF1_BASE_ADDR_HI,
  66         REG_RXF2_BASE_ADDR_HI,
  67         REG_RXF3_BASE_ADDR_HI
  68 };
  69
  70 static const u16
  71 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  72 {
  73         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  74         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  75         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  76         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  77 };
  78
  79 static const u16
  80 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  81 {
  82         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  83         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  84         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  85         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  86 };
  87
  88 static const u16 atl1e_pay_load_size[] = {
  89         128, 256, 512, 1024, 2048, 4096,
  90 };
  91
  92 /**
  93  * atl1e_irq_enable - Enable default interrupt generation settings
  94  * @adapter: board private structure
  95  */
  96 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  97 {
  98         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  99                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 100                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
 101                 AT_WRITE_FLUSH(&adapter->hw);
 102         }
 103 }
 104
 105 /**
 106  * atl1e_irq_disable - Mask off interrupt generation on the NIC
 107  * @adapter: board private structure
 108  */
 109 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
 110 {
 111         atomic_inc(&adapter->irq_sem);
 112         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 113         AT_WRITE_FLUSH(&adapter->hw);
 114         synchronize_irq(adapter->pdev->irq);
 115 }
 116
 117 /**
 118  * atl1e_irq_reset - reset interrupt confiure on the NIC
 119  * @adapter: board private structure
 120  */
 121 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 122 {
 123         atomic_set(&adapter->irq_sem, 0);
 124         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 125         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 126         AT_WRITE_FLUSH(&adapter->hw);
 127 }
 128
 129 /**
 130  * atl1e_phy_config - Timer Call-back
 131  * @data: pointer to netdev cast into an unsigned long
 132  */
 133 static void atl1e_phy_config(unsigned long data)
 134 {
 135         struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
 136         struct atl1e_hw *hw = &adapter->hw;
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&adapter->mdio_lock, flags);
 140         atl1e_restart_autoneg(hw);
 141         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 142 }
 143
 144 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 145 {
 146
 147         WARN_ON(in_interrupt());
 148         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 149                 msleep(1);
 150         atl1e_down(adapter);
 151         atl1e_up(adapter);
 152         clear_bit(__AT_RESETTING, &adapter->flags);
 153 }
 154
 155 static void atl1e_reset_task(struct work_struct *work)
 156 {
 157         struct atl1e_adapter *adapter;
 158         adapter = container_of(work, struct atl1e_adapter, reset_task);
 159
 160         atl1e_reinit_locked(adapter);
 161 }
 162
 163 static int atl1e_check_link(struct atl1e_adapter *adapter)
 164 {
 165         struct atl1e_hw *hw = &adapter->hw;
 166         struct net_device *netdev = adapter->netdev;
 167         int err = 0;
 168         u16 speed, duplex, phy_data;
 169
 170         /* MII_BMSR must read twice */
 171         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 172         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 173         if ((phy_data & BMSR_LSTATUS) == 0) {
 174                 /* link down */
 175                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 176                         u32 value;
 177                         /* disable rx */
 178                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 179                         value &= ~MAC_CTRL_RX_EN;
 180                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 181                         adapter->link_speed = SPEED_0;
 182                         netif_carrier_off(netdev);
 183                         netif_stop_queue(netdev);
 184                 }
 185         } else {
 186                 /* Link Up */
 187                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 188                 if (unlikely(err))
 189                         return err;
 190
 191                 /* link result is our setting */
 192                 if (adapter->link_speed != speed ||
 193                     adapter->link_duplex != duplex) {
 194                         adapter->link_speed  = speed;
 195                         adapter->link_duplex = duplex;
 196                         atl1e_setup_mac_ctrl(adapter);
 197                         netdev_info(netdev,
 198                                     "NIC Link is Up <%d Mbps %s Duplex>\n",
 199                                     adapter->link_speed,
 200                                     adapter->link_duplex == FULL_DUPLEX ?
 201                                     "Full" : "Half");
 202                 }
 203
 204                 if (!netif_carrier_ok(netdev)) {
 205                         /* Link down -> Up */
 206                         netif_carrier_on(netdev);
 207                         netif_wake_queue(netdev);
 208                 }
 209         }
 210         return 0;
 211 }
 212
 213 /**
 214  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 215  * @netdev: network interface device structure
 216  */
 217 static void atl1e_link_chg_task(struct work_struct *work)
 218 {
 219         struct atl1e_adapter *adapter;
 220         unsigned long flags;
 221
 222         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 223         spin_lock_irqsave(&adapter->mdio_lock, flags);
 224         atl1e_check_link(adapter);
 225         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 226 }
 227
 228 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 229 {
 230         struct net_device *netdev = adapter->netdev;
 231         u16 phy_data = 0;
 232         u16 link_up = 0;
 233
 234         spin_lock(&adapter->mdio_lock);
 235         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 236         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 237         spin_unlock(&adapter->mdio_lock);
 238         link_up = phy_data & BMSR_LSTATUS;
 239         /* notify upper layer link down ASAP */
 240         if (!link_up) {
 241                 if (netif_carrier_ok(netdev)) {
 242                         /* old link state: Up */
 243                         netdev_info(netdev, "NIC Link is Down\n");
 244                         adapter->link_speed = SPEED_0;
 245                         netif_stop_queue(netdev);
 246                 }
 247         }
 248         schedule_work(&adapter->link_chg_task);
 249 }
 250
 251 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 252 {
 253         del_timer_sync(&adapter->phy_config_timer);
 254 }
 255
 256 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 257 {
 258         cancel_work_sync(&adapter->reset_task);
 259         cancel_work_sync(&adapter->link_chg_task);
 260 }
 261
 262 /**
 263  * atl1e_tx_timeout - Respond to a Tx Hang
 264  * @netdev: network interface device structure
 265  */
 266 static void atl1e_tx_timeout(struct net_device *netdev)
 267 {
 268         struct atl1e_adapter *adapter = netdev_priv(netdev);
 269
 270         /* Do the reset outside of interrupt context */
 271         schedule_work(&adapter->reset_task);
 272 }
 273
 274 /**
 275  * atl1e_set_multi - Multicast and Promiscuous mode set
 276  * @netdev: network interface device structure
 277  *
 278  * The set_multi entry point is called whenever the multicast address
 279  * list or the network interface flags are updated.  This routine is
 280  * responsible for configuring the hardware for proper multicast,
 281  * promiscuous mode, and all-multi behavior.
 282  */
 283 static void atl1e_set_multi(struct net_device *netdev)
 284 {
 285         struct atl1e_adapter *adapter = netdev_priv(netdev);
 286         struct atl1e_hw *hw = &adapter->hw;
 287         struct netdev_hw_addr *ha;
 288         u32 mac_ctrl_data = 0;
 289         u32 hash_value;
 290
 291         /* Check for Promiscuous and All Multicast modes */
 292         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 293
 294         if (netdev->flags & IFF_PROMISC) {
 295                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 296         } else if (netdev->flags & IFF_ALLMULTI) {
 297                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 298                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 299         } else {
 300                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 301         }
 302
 303         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 304
 305         /* clear the old settings from the multicast hash table */
 306         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 307         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 308
 309         /* comoute mc addresses' hash value ,and put it into hash table */
 310         netdev_for_each_mc_addr(ha, netdev) {
 311                 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 312                 atl1e_hash_set(hw, hash_value);
 313         }
 314 }
 315
 316 static void __atl1e_rx_mode(netdev_features_t features, u32 *mac_ctrl_data)
 317 {
 318
 319         if (features & NETIF_F_RXALL) {
 320                 /* enable RX of ALL frames */
 321                 *mac_ctrl_data |= MAC_CTRL_DBG;
 322         } else {
 323                 /* disable RX of ALL frames */
 324                 *mac_ctrl_data &= ~MAC_CTRL_DBG;
 325         }
 326 }
 327
 328 static void atl1e_rx_mode(struct net_device *netdev,
 329         netdev_features_t features)
 330 {
 331         struct atl1e_adapter *adapter = netdev_priv(netdev);
 332         u32 mac_ctrl_data = 0;
 333
 334         netdev_dbg(adapter->netdev, "%s\n", __func__);
 335
 336         atl1e_irq_disable(adapter);
 337         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 338         __atl1e_rx_mode(features, &mac_ctrl_data);
 339         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 340         atl1e_irq_enable(adapter);
 341 }
 342
 343
 344 static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 345 {
 346         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 347                 /* enable VLAN tag insert/strip */
 348                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 349         } else {
 350                 /* disable VLAN tag insert/strip */
 351                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 352         }
 353 }
 354
 355 static void atl1e_vlan_mode(struct net_device *netdev,
 356         netdev_features_t features)
 357 {
 358         struct atl1e_adapter *adapter = netdev_priv(netdev);
 359         u32 mac_ctrl_data = 0;
 360
 361         netdev_dbg(adapter->netdev, "%s\n", __func__);
 362
 363         atl1e_irq_disable(adapter);
 364         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 365         __atl1e_vlan_mode(features, &mac_ctrl_data);
 366         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 367         atl1e_irq_enable(adapter);
 368 }
 369
 370 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 371 {
 372         netdev_dbg(adapter->netdev, "%s\n", __func__);
 373         atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
 374 }
 375
 376 /**
 377  * atl1e_set_mac - Change the Ethernet Address of the NIC
 378  * @netdev: network interface device structure
 379  * @p: pointer to an address structure
 380  *
 381  * Returns 0 on success, negative on failure
 382  */
 383 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 384 {
 385         struct atl1e_adapter *adapter = netdev_priv(netdev);
 386         struct sockaddr *addr = p;
 387
 388         if (!is_valid_ether_addr(addr->sa_data))
 389                 return -EADDRNOTAVAIL;
 390
 391         if (netif_running(netdev))
 392                 return -EBUSY;
 393
 394         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 395         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 396
 397         atl1e_hw_set_mac_addr(&adapter->hw);
 398
 399         return 0;
 400 }
 401
 402 static netdev_features_t atl1e_fix_features(struct net_device *netdev,
 403         netdev_features_t features)
 404 {
 405         /*
 406          * Since there is no support for separate rx/tx vlan accel
 407          * enable/disable make sure tx flag is always in same state as rx.
 408          */
 409         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 410                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 411         else
 412                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 413
 414         return features;
 415 }
 416
 417 static int atl1e_set_features(struct net_device *netdev,
 418         netdev_features_t features)
 419 {
 420         netdev_features_t changed = netdev->features ^ features;
 421
 422         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 423                 atl1e_vlan_mode(netdev, features);
 424
 425         if (changed & NETIF_F_RXALL)
 426                 atl1e_rx_mode(netdev, features);
 427
 428
 429         return 0;
 430 }
 431
 432 /**
 433  * atl1e_change_mtu - Change the Maximum Transfer Unit
 434  * @netdev: network interface device structure
 435  * @new_mtu: new value for maximum frame size
 436  *
 437  * Returns 0 on success, negative on failure
 438  */
 439 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 440 {
 441         struct atl1e_adapter *adapter = netdev_priv(netdev);
 442         int old_mtu   = netdev->mtu;
 443         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 444
 445         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 446                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 447                 netdev_warn(adapter->netdev, "invalid MTU setting\n");
 448                 return -EINVAL;
 449         }
 450         /* set MTU */
 451         if (old_mtu != new_mtu && netif_running(netdev)) {
 452                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 453                         msleep(1);
 454                 netdev->mtu = new_mtu;
 455                 adapter->hw.max_frame_size = new_mtu;
 456                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 457                 atl1e_down(adapter);
 458                 atl1e_up(adapter);
 459                 clear_bit(__AT_RESETTING, &adapter->flags);
 460         }
 461         return 0;
 462 }
 463
 464 /*
 465  *  caller should hold mdio_lock
 466  */
 467 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 468 {
 469         struct atl1e_adapter *adapter = netdev_priv(netdev);
 470         u16 result;
 471
 472         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 473         return result;
 474 }
 475
 476 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 477                              int reg_num, int val)
 478 {
 479         struct atl1e_adapter *adapter = netdev_priv(netdev);
 480
 481         atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 482 }
 483
 484 static int atl1e_mii_ioctl(struct net_device *netdev,
 485                            struct ifreq *ifr, int cmd)
 486 {
 487         struct atl1e_adapter *adapter = netdev_priv(netdev);
 488         struct mii_ioctl_data *data = if_mii(ifr);
 489         unsigned long flags;
 490         int retval = 0;
 491
 492         if (!netif_running(netdev))
 493                 return -EINVAL;
 494
 495         spin_lock_irqsave(&adapter->mdio_lock, flags);
 496         switch (cmd) {
 497         case SIOCGMIIPHY:
 498                 data->phy_id = 0;
 499                 break;
 500
 501         case SIOCGMIIREG:
 502                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 503                                     &data->val_out)) {
 504                         retval = -EIO;
 505                         goto out;
 506                 }
 507                 break;
 508
 509         case SIOCSMIIREG:
 510                 if (data->reg_num & ~(0x1F)) {
 511                         retval = -EFAULT;
 512                         goto out;
 513                 }
 514
 515                 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 516                            data->reg_num, data->val_in);
 517                 if (atl1e_write_phy_reg(&adapter->hw,
 518                                      data->reg_num, data->val_in)) {
 519                         retval = -EIO;
 520                         goto out;
 521                 }
 522                 break;
 523
 524         default:
 525                 retval = -EOPNOTSUPP;
 526                 break;
 527         }
 528 out:
 529         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 530         return retval;
 531
 532 }
 533
 534 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 535 {
 536         switch (cmd) {
 537         case SIOCGMIIPHY:
 538         case SIOCGMIIREG:
 539         case SIOCSMIIREG:
 540                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 541         default:
 542                 return -EOPNOTSUPP;
 543         }
 544 }
 545
 546 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 547 {
 548         u16 cmd;
 549
 550         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 551         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 552         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 553         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 554
 555         /*
 556          * some motherboards BIOS(PXE/EFI) driver may set PME
 557          * while they transfer control to OS (Windows/Linux)
 558          * so we should clear this bit before NIC work normally
 559          */
 560         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 561         msleep(1);
 562 }
 563
 564 /**
 565  * atl1e_alloc_queues - Allocate memory for all rings
 566  * @adapter: board private structure to initialize
 567  *
 568  */
 569 static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
 570 {
 571         return 0;
 572 }
 573
 574 /**
 575  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 576  * @adapter: board private structure to initialize
 577  *
 578  * atl1e_sw_init initializes the Adapter private data structure.
 579  * Fields are initialized based on PCI device information and
 580  * OS network device settings (MTU size).
 581  */
 582 static int atl1e_sw_init(struct atl1e_adapter *adapter)
 583 {
 584         struct atl1e_hw *hw   = &adapter->hw;
 585         struct pci_dev  *pdev = adapter->pdev;
 586         u32 phy_status_data = 0;
 587
 588         adapter->wol = 0;
 589         adapter->link_speed = SPEED_0;   /* hardware init */
 590         adapter->link_duplex = FULL_DUPLEX;
 591         adapter->num_rx_queues = 1;
 592
 593         /* PCI config space info */
 594         hw->vendor_id = pdev->vendor;
 595         hw->device_id = pdev->device;
 596         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 597         hw->subsystem_id = pdev->subsystem_device;
 598         hw->revision_id  = pdev->revision;
 599
 600         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 601
 602         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 603         /* nic type */
 604         if (hw->revision_id >= 0xF0) {
 605                 hw->nic_type = athr_l2e_revB;
 606         } else {
 607                 if (phy_status_data & PHY_STATUS_100M)
 608                         hw->nic_type = athr_l1e;
 609                 else
 610                         hw->nic_type = athr_l2e_revA;
 611         }
 612
 613         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 614
 615         if (phy_status_data & PHY_STATUS_EMI_CA)
 616                 hw->emi_ca = true;
 617         else
 618                 hw->emi_ca = false;
 619
 620         hw->phy_configured = false;
 621         hw->preamble_len = 7;
 622         hw->max_frame_size = adapter->netdev->mtu;
 623         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 624                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 625
 626         hw->rrs_type = atl1e_rrs_disable;
 627         hw->indirect_tab = 0;
 628         hw->base_cpu = 0;
 629
 630         /* need confirm */
 631
 632         hw->ict = 50000;                 /* 100ms */
 633         hw->smb_timer = 200000;          /* 200ms  */
 634         hw->tpd_burst = 5;
 635         hw->rrd_thresh = 1;
 636         hw->tpd_thresh = adapter->tx_ring.count / 2;
 637         hw->rx_count_down = 4;  /* 2us resolution */
 638         hw->tx_count_down = hw->imt * 4 / 3;
 639         hw->dmar_block = atl1e_dma_req_1024;
 640         hw->dmaw_block = atl1e_dma_req_1024;
 641         hw->dmar_dly_cnt = 15;
 642         hw->dmaw_dly_cnt = 4;
 643
 644         if (atl1e_alloc_queues(adapter)) {
 645                 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 646                 return -ENOMEM;
 647         }
 648
 649         atomic_set(&adapter->irq_sem, 1);
 650         spin_lock_init(&adapter->mdio_lock);
 651         spin_lock_init(&adapter->tx_lock);
 652
 653         set_bit(__AT_DOWN, &adapter->flags);
 654
 655         return 0;
 656 }
 657
 658 /**
 659  * atl1e_clean_tx_ring - Free Tx-skb
 660  * @adapter: board private structure
 661  */
 662 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 663 {
 664         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 665         struct atl1e_tx_buffer *tx_buffer = NULL;
 666         struct pci_dev *pdev = adapter->pdev;
 667         u16 index, ring_count;
 668
 669         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 670                 return;
 671
 672         ring_count = tx_ring->count;
 673         /* first unmmap dma */
 674         for (index = 0; index < ring_count; index++) {
 675                 tx_buffer = &tx_ring->tx_buffer[index];
 676                 if (tx_buffer->dma) {
 677                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 678                                 pci_unmap_single(pdev, tx_buffer->dma,
 679                                         tx_buffer->length, PCI_DMA_TODEVICE);
 680                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 681                                 pci_unmap_page(pdev, tx_buffer->dma,
 682                                         tx_buffer->length, PCI_DMA_TODEVICE);
 683                         tx_buffer->dma = 0;
 684                 }
 685         }
 686         /* second free skb */
 687         for (index = 0; index < ring_count; index++) {
 688                 tx_buffer = &tx_ring->tx_buffer[index];
 689                 if (tx_buffer->skb) {
 690                         dev_kfree_skb_any(tx_buffer->skb);
 691                         tx_buffer->skb = NULL;
 692                 }
 693         }
 694         /* Zero out Tx-buffers */
 695         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 696                                 ring_count);
 697         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 698                                 ring_count);
 699 }
 700
 701 /**
 702  * atl1e_clean_rx_ring - Free rx-reservation skbs
 703  * @adapter: board private structure
 704  */
 705 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 706 {
 707         struct atl1e_rx_ring *rx_ring =
 708                 &adapter->rx_ring;
 709         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 710         u16 i, j;
 711
 712
 713         if (adapter->ring_vir_addr == NULL)
 714                 return;
 715         /* Zero out the descriptor ring */
 716         for (i = 0; i < adapter->num_rx_queues; i++) {
 717                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 718                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 719                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 720                                                 rx_ring->real_page_size);
 721                         }
 722                 }
 723         }
 724 }
 725
 726 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 727 {
 728         *ring_size = ((u32)(adapter->tx_ring.count *
 729                      sizeof(struct atl1e_tpd_desc) + 7
 730                         /* tx ring, qword align */
 731                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 732                         adapter->num_rx_queues + 31
 733                         /* rx ring,  32 bytes align */
 734                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 735                         sizeof(u32) + 3));
 736                         /* tx, rx cmd, dword align   */
 737 }
 738
 739 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 740 {
 741         struct atl1e_rx_ring *rx_ring = NULL;
 742
 743         rx_ring = &adapter->rx_ring;
 744
 745         rx_ring->real_page_size = adapter->rx_ring.page_size
 746                                  + adapter->hw.max_frame_size
 747                                  + ETH_HLEN + VLAN_HLEN
 748                                  + ETH_FCS_LEN;
 749         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 750         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 751
 752         adapter->ring_vir_addr = NULL;
 753         adapter->rx_ring.desc = NULL;
 754         rwlock_init(&adapter->tx_ring.tx_lock);
 755 }
 756
 757 /*
 758  * Read / Write Ptr Initialize:
 759  */
 760 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 761 {
 762         struct atl1e_tx_ring *tx_ring = NULL;
 763         struct atl1e_rx_ring *rx_ring = NULL;
 764         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 765         int i, j;
 766
 767         tx_ring = &adapter->tx_ring;
 768         rx_ring = &adapter->rx_ring;
 769         rx_page_desc = rx_ring->rx_page_desc;
 770
 771         tx_ring->next_to_use = 0;
 772         atomic_set(&tx_ring->next_to_clean, 0);
 773
 774         for (i = 0; i < adapter->num_rx_queues; i++) {
 775                 rx_page_desc[i].rx_using  = 0;
 776                 rx_page_desc[i].rx_nxseq = 0;
 777                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 778                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 779                         rx_page_desc[i].rx_page[j].read_offset = 0;
 780                 }
 781         }
 782 }
 783
 784 /**
 785  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 786  * @adapter: board private structure
 787  *
 788  * Free all transmit software resources
 789  */
 790 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 791 {
 792         struct pci_dev *pdev = adapter->pdev;
 793
 794         atl1e_clean_tx_ring(adapter);
 795         atl1e_clean_rx_ring(adapter);
 796
 797         if (adapter->ring_vir_addr) {
 798                 pci_free_consistent(pdev, adapter->ring_size,
 799                                 adapter->ring_vir_addr, adapter->ring_dma);
 800                 adapter->ring_vir_addr = NULL;
 801         }
 802
 803         if (adapter->tx_ring.tx_buffer) {
 804                 kfree(adapter->tx_ring.tx_buffer);
 805                 adapter->tx_ring.tx_buffer = NULL;
 806         }
 807 }
 808
 809 /**
 810  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 811  * @adapter: board private structure
 812  *
 813  * Return 0 on success, negative on failure
 814  */
 815 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 816 {
 817         struct pci_dev *pdev = adapter->pdev;
 818         struct atl1e_tx_ring *tx_ring;
 819         struct atl1e_rx_ring *rx_ring;
 820         struct atl1e_rx_page_desc  *rx_page_desc;
 821         int size, i, j;
 822         u32 offset = 0;
 823         int err = 0;
 824
 825         if (adapter->ring_vir_addr != NULL)
 826                 return 0; /* alloced already */
 827
 828         tx_ring = &adapter->tx_ring;
 829         rx_ring = &adapter->rx_ring;
 830
 831         /* real ring DMA buffer */
 832
 833         size = adapter->ring_size;
 834         adapter->ring_vir_addr = pci_alloc_consistent(pdev,
 835                         adapter->ring_size, &adapter->ring_dma);
 836
 837         if (adapter->ring_vir_addr == NULL) {
 838                 netdev_err(adapter->netdev,
 839                            "pci_alloc_consistent failed, size = D%d\n", size);
 840                 return -ENOMEM;
 841         }
 842
 843         memset(adapter->ring_vir_addr, 0, adapter->ring_size);
 844
 845         rx_page_desc = rx_ring->rx_page_desc;
 846
 847         /* Init TPD Ring */
 848         tx_ring->dma = roundup(adapter->ring_dma, 8);
 849         offset = tx_ring->dma - adapter->ring_dma;
 850         tx_ring->desc = adapter->ring_vir_addr + offset;
 851         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 852         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 853         if (tx_ring->tx_buffer == NULL) {
 854                 err = -ENOMEM;
 855                 goto failed;
 856         }
 857
 858         /* Init RXF-Pages */
 859         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 860         offset = roundup(offset, 32);
 861
 862         for (i = 0; i < adapter->num_rx_queues; i++) {
 863                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 864                         rx_page_desc[i].rx_page[j].dma =
 865                                 adapter->ring_dma + offset;
 866                         rx_page_desc[i].rx_page[j].addr =
 867                                 adapter->ring_vir_addr + offset;
 868                         offset += rx_ring->real_page_size;
 869                 }
 870         }
 871
 872         /* Init CMB dma address */
 873         tx_ring->cmb_dma = adapter->ring_dma + offset;
 874         tx_ring->cmb = adapter->ring_vir_addr + offset;
 875         offset += sizeof(u32);
 876
 877         for (i = 0; i < adapter->num_rx_queues; i++) {
 878                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 879                         rx_page_desc[i].rx_page[j].write_offset_dma =
 880                                 adapter->ring_dma + offset;
 881                         rx_page_desc[i].rx_page[j].write_offset_addr =
 882                                 adapter->ring_vir_addr + offset;
 883                         offset += sizeof(u32);
 884                 }
 885         }
 886
 887         if (unlikely(offset > adapter->ring_size)) {
 888                 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 889                            offset, adapter->ring_size);
 890                 err = -1;
 891                 goto failed;
 892         }
 893
 894         return 0;
 895 failed:
 896         if (adapter->ring_vir_addr != NULL) {
 897                 pci_free_consistent(pdev, adapter->ring_size,
 898                                 adapter->ring_vir_addr, adapter->ring_dma);
 899                 adapter->ring_vir_addr = NULL;
 900         }
 901         return err;
 902 }
 903
 904 static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
 905 {
 906
 907         struct atl1e_hw *hw = &adapter->hw;
 908         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
 909         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 910         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 911         int i, j;
 912
 913         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 914                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 915         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 916                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 917         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 918         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 919                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 920
 921         rx_page_desc = rx_ring->rx_page_desc;
 922         /* RXF Page Physical address / Page Length */
 923         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 924                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 925                                  (u32)((adapter->ring_dma &
 926                                  AT_DMA_HI_ADDR_MASK) >> 32));
 927                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 928                         u32 page_phy_addr;
 929                         u32 offset_phy_addr;
 930
 931                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 932                         offset_phy_addr =
 933                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 934
 935                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 936                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 937                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 938                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 939                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 940                 }
 941         }
 942         /* Page Length */
 943         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 944         /* Load all of base address above */
 945         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 946 }
 947
 948 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 949 {
 950         struct atl1e_hw *hw = &adapter->hw;
 951         u32 dev_ctrl_data = 0;
 952         u32 max_pay_load = 0;
 953         u32 jumbo_thresh = 0;
 954         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 955
 956         /* configure TXQ param */
 957         if (hw->nic_type != athr_l2e_revB) {
 958                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 959                 if (hw->max_frame_size <= 1500) {
 960                         jumbo_thresh = hw->max_frame_size + extra_size;
 961                 } else if (hw->max_frame_size < 6*1024) {
 962                         jumbo_thresh =
 963                                 (hw->max_frame_size + extra_size) * 2 / 3;
 964                 } else {
 965                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 966                 }
 967                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 968         }
 969
 970         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 971
 972         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 973                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 974
 975         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 976
 977         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 978                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 979         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 980
 981         if (hw->nic_type != athr_l2e_revB)
 982                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 983                               atl1e_pay_load_size[hw->dmar_block]);
 984         /* enable TXQ */
 985         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 986                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 987                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 988                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 989 }
 990
 991 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 992 {
 993         struct atl1e_hw *hw = &adapter->hw;
 994         u32 rxf_len  = 0;
 995         u32 rxf_low  = 0;
 996         u32 rxf_high = 0;
 997         u32 rxf_thresh_data = 0;
 998         u32 rxq_ctrl_data = 0;
 999
1000         if (hw->nic_type != athr_l2e_revB) {
1001                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
1002                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
1003                               RXQ_JMBOSZ_TH_SHIFT |
1004                               (1 & RXQ_JMBO_LKAH_MASK) <<
1005                               RXQ_JMBO_LKAH_SHIFT));
1006
1007                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
1008                 rxf_high = rxf_len * 4 / 5;
1009                 rxf_low  = rxf_len / 5;
1010                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
1011                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1012                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
1013                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1014
1015                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
1016         }
1017
1018         /* RRS */
1019         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1020         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1021
1022         if (hw->rrs_type & atl1e_rrs_ipv4)
1023                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1024
1025         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1026                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1027
1028         if (hw->rrs_type & atl1e_rrs_ipv6)
1029                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1030
1031         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1032                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1033
1034         if (hw->rrs_type != atl1e_rrs_disable)
1035                 rxq_ctrl_data |=
1036                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1037
1038         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1039                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1040
1041         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1042 }
1043
1044 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1045 {
1046         struct atl1e_hw *hw = &adapter->hw;
1047         u32 dma_ctrl_data = 0;
1048
1049         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1050         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1051                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1052         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1053                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1054         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1055         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1056                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1057         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1058                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1059
1060         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1061 }
1062
1063 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1064 {
1065         u32 value;
1066         struct atl1e_hw *hw = &adapter->hw;
1067         struct net_device *netdev = adapter->netdev;
1068
1069         /* Config MAC CTRL Register */
1070         value = MAC_CTRL_TX_EN |
1071                 MAC_CTRL_RX_EN ;
1072
1073         if (FULL_DUPLEX == adapter->link_duplex)
1074                 value |= MAC_CTRL_DUPLX;
1075
1076         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1077                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1078                           MAC_CTRL_SPEED_SHIFT);
1079         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1080
1081         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1082         value |= (((u32)adapter->hw.preamble_len &
1083                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1084
1085         __atl1e_vlan_mode(netdev->features, &value);
1086
1087         value |= MAC_CTRL_BC_EN;
1088         if (netdev->flags & IFF_PROMISC)
1089                 value |= MAC_CTRL_PROMIS_EN;
1090         if (netdev->flags & IFF_ALLMULTI)
1091                 value |= MAC_CTRL_MC_ALL_EN;
1092         if (netdev->features & NETIF_F_RXALL)
1093                 value |= MAC_CTRL_DBG;
1094         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1095 }
1096
1097 /**
1098  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1099  * @adapter: board private structure
1100  *
1101  * Configure the Tx /Rx unit of the MAC after a reset.
1102  */
1103 static int atl1e_configure(struct atl1e_adapter *adapter)
1104 {
1105         struct atl1e_hw *hw = &adapter->hw;
1106
1107         u32 intr_status_data = 0;
1108
1109         /* clear interrupt status */
1110         AT_WRITE_REG(hw, REG_ISR, ~0);
1111
1112         /* 1. set MAC Address */
1113         atl1e_hw_set_mac_addr(hw);
1114
1115         /* 2. Init the Multicast HASH table done by set_muti */
1116
1117         /* 3. Clear any WOL status */
1118         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1119
1120         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1121          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1122          *    High 32bits memory */
1123         atl1e_configure_des_ring(adapter);
1124
1125         /* 5. set Interrupt Moderator Timer */
1126         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1127         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1128         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1129                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1130
1131         /* 6. rx/tx threshold to trig interrupt */
1132         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1133         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1134         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1135         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1136
1137         /* 7. set Interrupt Clear Timer */
1138         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1139
1140         /* 8. set MTU */
1141         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1142                         VLAN_HLEN + ETH_FCS_LEN);
1143
1144         /* 9. config TXQ early tx threshold */
1145         atl1e_configure_tx(adapter);
1146
1147         /* 10. config RXQ */
1148         atl1e_configure_rx(adapter);
1149
1150         /* 11. config  DMA Engine */
1151         atl1e_configure_dma(adapter);
1152
1153         /* 12. smb timer to trig interrupt */
1154         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1155
1156         intr_status_data = AT_READ_REG(hw, REG_ISR);
1157         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1158                 netdev_err(adapter->netdev,
1159                            "atl1e_configure failed, PCIE phy link down\n");
1160                 return -1;
1161         }
1162
1163         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1164         return 0;
1165 }
1166
1167 /**
1168  * atl1e_get_stats - Get System Network Statistics
1169  * @netdev: network interface device structure
1170  *
1171  * Returns the address of the device statistics structure.
1172  * The statistics are actually updated from the timer callback.
1173  */
1174 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1175 {
1176         struct atl1e_adapter *adapter = netdev_priv(netdev);
1177         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1178         struct net_device_stats *net_stats = &netdev->stats;
1179
1180         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1181         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1182         net_stats->multicast  = hw_stats->rx_mcast;
1183         net_stats->collisions = hw_stats->tx_1_col +
1184                                 hw_stats->tx_2_col +
1185                                 hw_stats->tx_late_col +
1186                                 hw_stats->tx_abort_col;
1187
1188         net_stats->rx_errors  = hw_stats->rx_frag +
1189                                 hw_stats->rx_fcs_err +
1190                                 hw_stats->rx_len_err +
1191                                 hw_stats->rx_sz_ov +
1192                                 hw_stats->rx_rrd_ov +
1193                                 hw_stats->rx_align_err +
1194                                 hw_stats->rx_rxf_ov;
1195
1196         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1197         net_stats->rx_length_errors = hw_stats->rx_len_err;
1198         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1199         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1200         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1201
1202         net_stats->tx_errors = hw_stats->tx_late_col +
1203                                hw_stats->tx_abort_col +
1204                                hw_stats->tx_underrun +
1205                                hw_stats->tx_trunc;
1206
1207         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1208         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1209         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1210
1211         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1212         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1213
1214         return net_stats;
1215 }
1216
1217 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1218 {
1219         u16 hw_reg_addr = 0;
1220         unsigned long *stats_item = NULL;
1221
1222         /* update rx status */
1223         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1224         stats_item  = &adapter->hw_stats.rx_ok;
1225         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1226                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1227                 stats_item++;
1228                 hw_reg_addr += 4;
1229         }
1230         /* update tx status */
1231         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1232         stats_item  = &adapter->hw_stats.tx_ok;
1233         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1234                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1235                 stats_item++;
1236                 hw_reg_addr += 4;
1237         }
1238 }
1239
1240 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1241 {
1242         u16 phy_data;
1243
1244         spin_lock(&adapter->mdio_lock);
1245         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1246         spin_unlock(&adapter->mdio_lock);
1247 }
1248
1249 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1250 {
1251         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1252         struct atl1e_tx_buffer *tx_buffer = NULL;
1253         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1254         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1255
1256         while (next_to_clean != hw_next_to_clean) {
1257                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1258                 if (tx_buffer->dma) {
1259                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1260                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1261                                         tx_buffer->length, PCI_DMA_TODEVICE);
1262                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1263                                 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1264                                         tx_buffer->length, PCI_DMA_TODEVICE);
1265                         tx_buffer->dma = 0;
1266                 }
1267
1268                 if (tx_buffer->skb) {
1269                         dev_kfree_skb_irq(tx_buffer->skb);
1270                         tx_buffer->skb = NULL;
1271                 }
1272
1273                 if (++next_to_clean == tx_ring->count)
1274                         next_to_clean = 0;
1275         }
1276
1277         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1278
1279         if (netif_queue_stopped(adapter->netdev) &&
1280                         netif_carrier_ok(adapter->netdev)) {
1281                 netif_wake_queue(adapter->netdev);
1282         }
1283
1284         return true;
1285 }
1286
1287 /**
1288  * atl1e_intr - Interrupt Handler
1289  * @irq: interrupt number
1290  * @data: pointer to a network interface device structure
1291  */
1292 static irqreturn_t atl1e_intr(int irq, void *data)
1293 {
1294         struct net_device *netdev  = data;
1295         struct atl1e_adapter *adapter = netdev_priv(netdev);
1296         struct atl1e_hw *hw = &adapter->hw;
1297         int max_ints = AT_MAX_INT_WORK;
1298         int handled = IRQ_NONE;
1299         u32 status;
1300
1301         do {
1302                 status = AT_READ_REG(hw, REG_ISR);
1303                 if ((status & IMR_NORMAL_MASK) == 0 ||
1304                                 (status & ISR_DIS_INT) != 0) {
1305                         if (max_ints != AT_MAX_INT_WORK)
1306                                 handled = IRQ_HANDLED;
1307                         break;
1308                 }
1309                 /* link event */
1310                 if (status & ISR_GPHY)
1311                         atl1e_clear_phy_int(adapter);
1312                 /* Ack ISR */
1313                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1314
1315                 handled = IRQ_HANDLED;
1316                 /* check if PCIE PHY Link down */
1317                 if (status & ISR_PHY_LINKDOWN) {
1318                         netdev_err(adapter->netdev,
1319                                    "pcie phy linkdown %x\n", status);
1320                         if (netif_running(adapter->netdev)) {
1321                                 /* reset MAC */
1322                                 atl1e_irq_reset(adapter);
1323                                 schedule_work(&adapter->reset_task);
1324                                 break;
1325                         }
1326                 }
1327
1328                 /* check if DMA read/write error */
1329                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1330                         netdev_err(adapter->netdev,
1331                                    "PCIE DMA RW error (status = 0x%x)\n",
1332                                    status);
1333                         atl1e_irq_reset(adapter);
1334                         schedule_work(&adapter->reset_task);
1335                         break;
1336                 }
1337
1338                 if (status & ISR_SMB)
1339                         atl1e_update_hw_stats(adapter);
1340
1341                 /* link event */
1342                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1343                         netdev->stats.tx_carrier_errors++;
1344                         atl1e_link_chg_event(adapter);
1345                         break;
1346                 }
1347
1348                 /* transmit event */
1349                 if (status & ISR_TX_EVENT)
1350                         atl1e_clean_tx_irq(adapter);
1351
1352                 if (status & ISR_RX_EVENT) {
1353                         /*
1354                          * disable rx interrupts, without
1355                          * the synchronize_irq bit
1356                          */
1357                         AT_WRITE_REG(hw, REG_IMR,
1358                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1359                         AT_WRITE_FLUSH(hw);
1360                         if (likely(napi_schedule_prep(
1361                                    &adapter->napi)))
1362                                 __napi_schedule(&adapter->napi);
1363                 }
1364         } while (--max_ints > 0);
1365         /* re-enable Interrupt*/
1366         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1367
1368         return handled;
1369 }
1370
1371 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1372                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1373 {
1374         u8 *packet = (u8 *)(prrs + 1);
1375         struct iphdr *iph;
1376         u16 head_len = ETH_HLEN;
1377         u16 pkt_flags;
1378         u16 err_flags;
1379
1380         skb_checksum_none_assert(skb);
1381         pkt_flags = prrs->pkt_flag;
1382         err_flags = prrs->err_flag;
1383         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1384                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1385                 if (pkt_flags & RRS_IS_IPV4) {
1386                         if (pkt_flags & RRS_IS_802_3)
1387                                 head_len += 8;
1388                         iph = (struct iphdr *) (packet + head_len);
1389                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1390                                 goto hw_xsum;
1391                 }
1392                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1393                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1394                         return;
1395                 }
1396         }
1397
1398 hw_xsum :
1399         return;
1400 }
1401
1402 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1403                                                u8 que)
1404 {
1405         struct atl1e_rx_page_desc *rx_page_desc =
1406                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1407         u8 rx_using = rx_page_desc[que].rx_using;
1408
1409         return &(rx_page_desc[que].rx_page[rx_using]);
1410 }
1411
1412 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1413                    int *work_done, int work_to_do)
1414 {
1415         struct net_device *netdev  = adapter->netdev;
1416         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1417         struct atl1e_rx_page_desc *rx_page_desc =
1418                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1419         struct sk_buff *skb = NULL;
1420         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1421         u32 packet_size, write_offset;
1422         struct atl1e_recv_ret_status *prrs;
1423
1424         write_offset = *(rx_page->write_offset_addr);
1425         if (likely(rx_page->read_offset < write_offset)) {
1426                 do {
1427                         if (*work_done >= work_to_do)
1428                                 break;
1429                         (*work_done)++;
1430                         /* get new packet's  rrs */
1431                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1432                                                  rx_page->read_offset);
1433                         /* check sequence number */
1434                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1435                                 netdev_err(netdev,
1436                                            "rx sequence number error (rx=%d) (expect=%d)\n",
1437                                            prrs->seq_num,
1438                                            rx_page_desc[que].rx_nxseq);
1439                                 rx_page_desc[que].rx_nxseq++;
1440                                 /* just for debug use */
1441                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1442                                              (((u32)prrs->seq_num) << 16) |
1443                                              rx_page_desc[que].rx_nxseq);
1444                                 goto fatal_err;
1445                         }
1446                         rx_page_desc[que].rx_nxseq++;
1447
1448                         /* error packet */
1449                         if ((prrs->pkt_flag & RRS_IS_ERR_FRAME) &&
1450                             !(netdev->features & NETIF_F_RXALL)) {
1451                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1452                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1453                                         RRS_ERR_TRUNC)) {
1454                                 /* hardware error, discard this packet*/
1455                                         netdev_err(netdev,
1456                                                    "rx packet desc error %x\n",
1457                                                    *((u32 *)prrs + 1));
1458                                         goto skip_pkt;
1459                                 }
1460                         }
1461
1462                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1463                                         RRS_PKT_SIZE_MASK);
1464                         if (likely(!(netdev->features & NETIF_F_RXFCS)))
1465                                 packet_size -= 4; /* CRC */
1466
1467                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1468                         if (skb == NULL)
1469                                 goto skip_pkt;
1470
1471                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1472                         skb_put(skb, packet_size);
1473                         skb->protocol = eth_type_trans(skb, netdev);
1474                         atl1e_rx_checksum(adapter, skb, prrs);
1475
1476                         if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1477                                 u16 vlan_tag = (prrs->vtag >> 4) |
1478                                                ((prrs->vtag & 7) << 13) |
1479                                                ((prrs->vtag & 8) << 9);
1480                                 netdev_dbg(netdev,
1481                                            "RXD VLAN TAG<RRD>=0x%04x\n",
1482                                            prrs->vtag);
1483                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1484                         }
1485                         netif_receive_skb(skb);
1486
1487 skip_pkt:
1488         /* skip current packet whether it's ok or not. */
1489                         rx_page->read_offset +=
1490                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1491                                 RRS_PKT_SIZE_MASK) +
1492                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1493                                                 0xFFFFFFE0);
1494
1495                         if (rx_page->read_offset >= rx_ring->page_size) {
1496                                 /* mark this page clean */
1497                                 u16 reg_addr;
1498                                 u8  rx_using;
1499
1500                                 rx_page->read_offset =
1501                                         *(rx_page->write_offset_addr) = 0;
1502                                 rx_using = rx_page_desc[que].rx_using;
1503                                 reg_addr =
1504                                         atl1e_rx_page_vld_regs[que][rx_using];
1505                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1506                                 rx_page_desc[que].rx_using ^= 1;
1507                                 rx_page = atl1e_get_rx_page(adapter, que);
1508                         }
1509                         write_offset = *(rx_page->write_offset_addr);
1510                 } while (rx_page->read_offset < write_offset);
1511         }
1512
1513         return;
1514
1515 fatal_err:
1516         if (!test_bit(__AT_DOWN, &adapter->flags))
1517                 schedule_work(&adapter->reset_task);
1518 }
1519
1520 /**
1521  * atl1e_clean - NAPI Rx polling callback
1522  */
1523 static int atl1e_clean(struct napi_struct *napi, int budget)
1524 {
1525         struct atl1e_adapter *adapter =
1526                         container_of(napi, struct atl1e_adapter, napi);
1527         u32 imr_data;
1528         int work_done = 0;
1529
1530         /* Keep link state information with original netdev */
1531         if (!netif_carrier_ok(adapter->netdev))
1532                 goto quit_polling;
1533
1534         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1535
1536         /* If no Tx and not enough Rx work done, exit the polling mode */
1537         if (work_done < budget) {
1538 quit_polling:
1539                 napi_complete(napi);
1540                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1541                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1542                 /* test debug */
1543                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1544                         atomic_dec(&adapter->irq_sem);
1545                         netdev_err(adapter->netdev,
1546                                    "atl1e_clean is called when AT_DOWN\n");
1547                 }
1548                 /* reenable RX intr */
1549                 /*atl1e_irq_enable(adapter); */
1550
1551         }
1552         return work_done;
1553 }
1554
1555 #ifdef CONFIG_NET_POLL_CONTROLLER
1556
1557 /*
1558  * Polling 'interrupt' - used by things like netconsole to send skbs
1559  * without having to re-enable interrupts. It's not called while
1560  * the interrupt routine is executing.
1561  */
1562 static void atl1e_netpoll(struct net_device *netdev)
1563 {
1564         struct atl1e_adapter *adapter = netdev_priv(netdev);
1565
1566         disable_irq(adapter->pdev->irq);
1567         atl1e_intr(adapter->pdev->irq, netdev);
1568         enable_irq(adapter->pdev->irq);
1569 }
1570 #endif
1571
1572 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1573 {
1574         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1575         u16 next_to_use = 0;
1576         u16 next_to_clean = 0;
1577
1578         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1579         next_to_use   = tx_ring->next_to_use;
1580
1581         return (u16)(next_to_clean > next_to_use) ?
1582                 (next_to_clean - next_to_use - 1) :
1583                 (tx_ring->count + next_to_clean - next_to_use - 1);
1584 }
1585
1586 /*
1587  * get next usable tpd
1588  * Note: should call atl1e_tdp_avail to make sure
1589  * there is enough tpd to use
1590  */
1591 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1592 {
1593         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1594         u16 next_to_use = 0;
1595
1596         next_to_use = tx_ring->next_to_use;
1597         if (++tx_ring->next_to_use == tx_ring->count)
1598                 tx_ring->next_to_use = 0;
1599
1600         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1601         return &tx_ring->desc[next_to_use];
1602 }
1603
1604 static struct atl1e_tx_buffer *
1605 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1606 {
1607         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1608
1609         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1610 }
1611
1612 /* Calculate the transmit packet descript needed*/
1613 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1614 {
1615         int i = 0;
1616         u16 tpd_req = 1;
1617         u16 fg_size = 0;
1618         u16 proto_hdr_len = 0;
1619
1620         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1621                 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1622                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1623         }
1624
1625         if (skb_is_gso(skb)) {
1626                 if (skb->protocol == htons(ETH_P_IP) ||
1627                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1628                         proto_hdr_len = skb_transport_offset(skb) +
1629                                         tcp_hdrlen(skb);
1630                         if (proto_hdr_len < skb_headlen(skb)) {
1631                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1632                                            MAX_TX_BUF_LEN - 1) >>
1633                                            MAX_TX_BUF_SHIFT);
1634                         }
1635                 }
1636
1637         }
1638         return tpd_req;
1639 }
1640
1641 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1642                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1643 {
1644         u8 hdr_len;
1645         u32 real_len;
1646         unsigned short offload_type;
1647         int err;
1648
1649         if (skb_is_gso(skb)) {
1650                 if (skb_header_cloned(skb)) {
1651                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1652                         if (unlikely(err))
1653                                 return -1;
1654                 }
1655                 offload_type = skb_shinfo(skb)->gso_type;
1656
1657                 if (offload_type & SKB_GSO_TCPV4) {
1658                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1659                                         + ntohs(ip_hdr(skb)->tot_len));
1660
1661                         if (real_len < skb->len)
1662                                 pskb_trim(skb, real_len);
1663
1664                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1665                         if (unlikely(skb->len == hdr_len)) {
1666                                 /* only xsum need */
1667                                 netdev_warn(adapter->netdev,
1668                                             "IPV4 tso with zero data??\n");
1669                                 goto check_sum;
1670                         } else {
1671                                 ip_hdr(skb)->check = 0;
1672                                 ip_hdr(skb)->tot_len = 0;
1673                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1674                                                         ip_hdr(skb)->saddr,
1675                                                         ip_hdr(skb)->daddr,
1676                                                         0, IPPROTO_TCP, 0);
1677                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1678                                         TDP_V4_IPHL_MASK) <<
1679                                         TPD_V4_IPHL_SHIFT;
1680                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1681                                         TPD_TCPHDRLEN_MASK) <<
1682                                         TPD_TCPHDRLEN_SHIFT;
1683                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1684                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1685                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1686                         }
1687                         return 0;
1688                 }
1689         }
1690
1691 check_sum:
1692         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1693                 u8 css, cso;
1694
1695                 cso = skb_checksum_start_offset(skb);
1696                 if (unlikely(cso & 0x1)) {
1697                         netdev_err(adapter->netdev,
1698                                    "payload offset should not ant event number\n");
1699                         return -1;
1700                 } else {
1701                         css = cso + skb->csum_offset;
1702                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1703                                         TPD_PLOADOFFSET_SHIFT;
1704                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1705                                         TPD_CCSUMOFFSET_SHIFT;
1706                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1707                 }
1708         }
1709
1710         return 0;
1711 }
1712
1713 static int atl1e_tx_map(struct atl1e_adapter *adapter,
1714                         struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1715 {
1716         struct atl1e_tpd_desc *use_tpd = NULL;
1717         struct atl1e_tx_buffer *tx_buffer = NULL;
1718         u16 buf_len = skb_headlen(skb);
1719         u16 map_len = 0;
1720         u16 mapped_len = 0;
1721         u16 hdr_len = 0;
1722         u16 nr_frags;
1723         u16 f;
1724         int segment;
1725         int ring_start = adapter->tx_ring.next_to_use;
1726         int ring_end;
1727
1728         nr_frags = skb_shinfo(skb)->nr_frags;
1729         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1730         if (segment) {
1731                 /* TSO */
1732                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1733                 use_tpd = tpd;
1734
1735                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1736                 tx_buffer->length = map_len;
1737                 tx_buffer->dma = pci_map_single(adapter->pdev,
1738                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1739                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1740                         return -ENOSPC;
1741
1742                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1743                 mapped_len += map_len;
1744                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1745                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1746                         ((cpu_to_le32(tx_buffer->length) &
1747                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1748         }
1749
1750         while (mapped_len < buf_len) {
1751                 /* mapped_len == 0, means we should use the first tpd,
1752                    which is given by caller  */
1753                 if (mapped_len == 0) {
1754                         use_tpd = tpd;
1755                 } else {
1756                         use_tpd = atl1e_get_tpd(adapter);
1757                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1758                 }
1759                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1760                 tx_buffer->skb = NULL;
1761
1762                 tx_buffer->length = map_len =
1763                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1764                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1765                 tx_buffer->dma =
1766                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1767                                         map_len, PCI_DMA_TODEVICE);
1768
1769                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1770                         /* We need to unwind the mappings we've done */
1771                         ring_end = adapter->tx_ring.next_to_use;
1772                         adapter->tx_ring.next_to_use = ring_start;
1773                         while (adapter->tx_ring.next_to_use != ring_end) {
1774                                 tpd = atl1e_get_tpd(adapter);
1775                                 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1776                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1777                                                  tx_buffer->length, PCI_DMA_TODEVICE);
1778                         }
1779                         /* Reset the tx rings next pointer */
1780                         adapter->tx_ring.next_to_use = ring_start;
1781                         return -ENOSPC;
1782                 }
1783
1784                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1785                 mapped_len  += map_len;
1786                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1787                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1788                         ((cpu_to_le32(tx_buffer->length) &
1789                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1790         }
1791
1792         for (f = 0; f < nr_frags; f++) {
1793                 const struct skb_frag_struct *frag;
1794                 u16 i;
1795                 u16 seg_num;
1796
1797                 frag = &skb_shinfo(skb)->frags[f];
1798                 buf_len = skb_frag_size(frag);
1799
1800                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1801                 for (i = 0; i < seg_num; i++) {
1802                         use_tpd = atl1e_get_tpd(adapter);
1803                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1804
1805                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1806                         BUG_ON(tx_buffer->skb);
1807
1808                         tx_buffer->skb = NULL;
1809                         tx_buffer->length =
1810                                 (buf_len > MAX_TX_BUF_LEN) ?
1811                                 MAX_TX_BUF_LEN : buf_len;
1812                         buf_len -= tx_buffer->length;
1813
1814                         tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1815                                                           frag,
1816                                                           (i * MAX_TX_BUF_LEN),
1817                                                           tx_buffer->length,
1818                                                           DMA_TO_DEVICE);
1819
1820                         if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1821                                 /* We need to unwind the mappings we've done */
1822                                 ring_end = adapter->tx_ring.next_to_use;
1823                                 adapter->tx_ring.next_to_use = ring_start;
1824                                 while (adapter->tx_ring.next_to_use != ring_end) {
1825                                         tpd = atl1e_get_tpd(adapter);
1826                                         tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1827                                         dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1828                                                        tx_buffer->length, DMA_TO_DEVICE);
1829                                 }
1830
1831                                 /* Reset the ring next to use pointer */
1832                                 adapter->tx_ring.next_to_use = ring_start;
1833                                 return -ENOSPC;
1834                         }
1835
1836                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1837                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1838                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1839                                         ((cpu_to_le32(tx_buffer->length) &
1840                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1841                 }
1842         }
1843
1844         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1845                 /* note this one is a tcp header */
1846                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1847         /* The last tpd */
1848
1849         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1850         /* The last buffer info contain the skb address,
1851            so it will be free after unmap */
1852         tx_buffer->skb = skb;
1853         return 0;
1854 }
1855
1856 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1857                            struct atl1e_tpd_desc *tpd)
1858 {
1859         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1860         /* Force memory writes to complete before letting h/w
1861          * know there are new descriptors to fetch.  (Only
1862          * applicable for weak-ordered memory model archs,
1863          * such as IA-64). */
1864         wmb();
1865         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1866 }
1867
1868 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1869                                           struct net_device *netdev)
1870 {
1871         struct atl1e_adapter *adapter = netdev_priv(netdev);
1872         unsigned long flags;
1873         u16 tpd_req = 1;
1874         struct atl1e_tpd_desc *tpd;
1875
1876         if (test_bit(__AT_DOWN, &adapter->flags)) {
1877                 dev_kfree_skb_any(skb);
1878                 return NETDEV_TX_OK;
1879         }
1880
1881         if (unlikely(skb->len <= 0)) {
1882                 dev_kfree_skb_any(skb);
1883                 return NETDEV_TX_OK;
1884         }
1885         tpd_req = atl1e_cal_tdp_req(skb);
1886         if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1887                 return NETDEV_TX_LOCKED;
1888
1889         if (atl1e_tpd_avail(adapter) < tpd_req) {
1890                 /* no enough descriptor, just stop queue */
1891                 netif_stop_queue(netdev);
1892                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1893                 return NETDEV_TX_BUSY;
1894         }
1895
1896         tpd = atl1e_get_tpd(adapter);
1897
1898         if (vlan_tx_tag_present(skb)) {
1899                 u16 vlan_tag = vlan_tx_tag_get(skb);
1900                 u16 atl1e_vlan_tag;
1901
1902                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1903                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1904                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1905                                 TPD_VLAN_SHIFT;
1906         }
1907
1908         if (skb->protocol == htons(ETH_P_8021Q))
1909                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1910
1911         if (skb_network_offset(skb) != ETH_HLEN)
1912                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1913
1914         /* do TSO and check sum */
1915         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1916                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1917                 dev_kfree_skb_any(skb);
1918                 return NETDEV_TX_OK;
1919         }
1920
1921         if (atl1e_tx_map(adapter, skb, tpd)) {
1922                 dev_kfree_skb_any(skb);
1923                 goto out;
1924         }
1925
1926         atl1e_tx_queue(adapter, tpd_req, tpd);
1927
1928         netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1929 out:
1930         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1931         return NETDEV_TX_OK;
1932 }
1933
1934 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1935 {
1936         struct net_device *netdev = adapter->netdev;
1937
1938         free_irq(adapter->pdev->irq, netdev);
1939 }
1940
1941 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1942 {
1943         struct pci_dev    *pdev   = adapter->pdev;
1944         struct net_device *netdev = adapter->netdev;
1945         int err = 0;
1946
1947         err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1948                           netdev);
1949         if (err) {
1950                 netdev_dbg(adapter->netdev,
1951                            "Unable to allocate interrupt Error: %d\n", err);
1952                 return err;
1953         }
1954         netdev_dbg(netdev, "atl1e_request_irq OK\n");
1955         return err;
1956 }
1957
1958 int atl1e_up(struct atl1e_adapter *adapter)
1959 {
1960         struct net_device *netdev = adapter->netdev;
1961         int err = 0;
1962         u32 val;
1963
1964         /* hardware has been reset, we need to reload some things */
1965         err = atl1e_init_hw(&adapter->hw);
1966         if (err) {
1967                 err = -EIO;
1968                 return err;
1969         }
1970         atl1e_init_ring_ptrs(adapter);
1971         atl1e_set_multi(netdev);
1972         atl1e_restore_vlan(adapter);
1973
1974         if (atl1e_configure(adapter)) {
1975                 err = -EIO;
1976                 goto err_up;
1977         }
1978
1979         clear_bit(__AT_DOWN, &adapter->flags);
1980         napi_enable(&adapter->napi);
1981         atl1e_irq_enable(adapter);
1982         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1983         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1984                       val | MASTER_CTRL_MANUAL_INT);
1985
1986 err_up:
1987         return err;
1988 }
1989
1990 void atl1e_down(struct atl1e_adapter *adapter)
1991 {
1992         struct net_device *netdev = adapter->netdev;
1993
1994         /* signal that we're down so the interrupt handler does not
1995          * reschedule our watchdog timer */
1996         set_bit(__AT_DOWN, &adapter->flags);
1997
1998         netif_stop_queue(netdev);
1999
2000         /* reset MAC to disable all RX/TX */
2001         atl1e_reset_hw(&adapter->hw);
2002         msleep(1);
2003
2004         napi_disable(&adapter->napi);
2005         atl1e_del_timer(adapter);
2006         atl1e_irq_disable(adapter);
2007
2008         netif_carrier_off(netdev);
2009         adapter->link_speed = SPEED_0;
2010         adapter->link_duplex = -1;
2011         atl1e_clean_tx_ring(adapter);
2012         atl1e_clean_rx_ring(adapter);
2013 }
2014
2015 /**
2016  * atl1e_open - Called when a network interface is made active
2017  * @netdev: network interface device structure
2018  *
2019  * Returns 0 on success, negative value on failure
2020  *
2021  * The open entry point is called when a network interface is made
2022  * active by the system (IFF_UP).  At this point all resources needed
2023  * for transmit and receive operations are allocated, the interrupt
2024  * handler is registered with the OS, the watchdog timer is started,
2025  * and the stack is notified that the interface is ready.
2026  */
2027 static int atl1e_open(struct net_device *netdev)
2028 {
2029         struct atl1e_adapter *adapter = netdev_priv(netdev);
2030         int err;
2031
2032         /* disallow open during test */
2033         if (test_bit(__AT_TESTING, &adapter->flags))
2034                 return -EBUSY;
2035
2036         /* allocate rx/tx dma buffer & descriptors */
2037         atl1e_init_ring_resources(adapter);
2038         err = atl1e_setup_ring_resources(adapter);
2039         if (unlikely(err))
2040                 return err;
2041
2042         err = atl1e_request_irq(adapter);
2043         if (unlikely(err))
2044                 goto err_req_irq;
2045
2046         err = atl1e_up(adapter);
2047         if (unlikely(err))
2048                 goto err_up;
2049
2050         return 0;
2051
2052 err_up:
2053         atl1e_free_irq(adapter);
2054 err_req_irq:
2055         atl1e_free_ring_resources(adapter);
2056         atl1e_reset_hw(&adapter->hw);
2057
2058         return err;
2059 }
2060
2061 /**
2062  * atl1e_close - Disables a network interface
2063  * @netdev: network interface device structure
2064  *
2065  * Returns 0, this is not allowed to fail
2066  *
2067  * The close entry point is called when an interface is de-activated
2068  * by the OS.  The hardware is still under the drivers control, but
2069  * needs to be disabled.  A global MAC reset is issued to stop the
2070  * hardware, and all transmit and receive resources are freed.
2071  */
2072 static int atl1e_close(struct net_device *netdev)
2073 {
2074         struct atl1e_adapter *adapter = netdev_priv(netdev);
2075
2076         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2077         atl1e_down(adapter);
2078         atl1e_free_irq(adapter);
2079         atl1e_free_ring_resources(adapter);
2080
2081         return 0;
2082 }
2083
2084 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2085 {
2086         struct net_device *netdev = pci_get_drvdata(pdev);
2087         struct atl1e_adapter *adapter = netdev_priv(netdev);
2088         struct atl1e_hw *hw = &adapter->hw;
2089         u32 ctrl = 0;
2090         u32 mac_ctrl_data = 0;
2091         u32 wol_ctrl_data = 0;
2092         u16 mii_advertise_data = 0;
2093         u16 mii_bmsr_data = 0;
2094         u16 mii_intr_status_data = 0;
2095         u32 wufc = adapter->wol;
2096         u32 i;
2097 #ifdef CONFIG_PM
2098         int retval = 0;
2099 #endif
2100
2101         if (netif_running(netdev)) {
2102                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2103                 atl1e_down(adapter);
2104         }
2105         netif_device_detach(netdev);
2106
2107 #ifdef CONFIG_PM
2108         retval = pci_save_state(pdev);
2109         if (retval)
2110                 return retval;
2111 #endif
2112
2113         if (wufc) {
2114                 /* get link status */
2115                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2116                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2117
2118                 mii_advertise_data = ADVERTISE_10HALF;
2119
2120                 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2121                     (atl1e_write_phy_reg(hw,
2122                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2123                     (atl1e_phy_commit(hw)) != 0) {
2124                         netdev_dbg(adapter->netdev, "set phy register failed\n");
2125                         goto wol_dis;
2126                 }
2127
2128                 hw->phy_configured = false; /* re-init PHY when resume */
2129
2130                 /* turn on magic packet wol */
2131                 if (wufc & AT_WUFC_MAG)
2132                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2133
2134                 if (wufc & AT_WUFC_LNKC) {
2135                 /* if orignal link status is link, just wait for retrive link */
2136                         if (mii_bmsr_data & BMSR_LSTATUS) {
2137                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2138                                         msleep(100);
2139                                         atl1e_read_phy_reg(hw, MII_BMSR,
2140                                                         &mii_bmsr_data);
2141                                         if (mii_bmsr_data & BMSR_LSTATUS)
2142                                                 break;
2143                                 }
2144
2145                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2146                                         netdev_dbg(adapter->netdev,
2147                                                    "Link may change when suspend\n");
2148                         }
2149                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2150                         /* only link up can wake up */
2151                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2152                                 netdev_dbg(adapter->netdev,
2153                                            "read write phy register failed\n");
2154                                 goto wol_dis;
2155                         }
2156                 }
2157                 /* clear phy interrupt */
2158                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2159                 /* Config MAC Ctrl register */
2160                 mac_ctrl_data = MAC_CTRL_RX_EN;
2161                 /* set to 10/100M halt duplex */
2162                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2163                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2164                                  MAC_CTRL_PRMLEN_MASK) <<
2165                                  MAC_CTRL_PRMLEN_SHIFT);
2166
2167                 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2168
2169                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2170                 if (wufc & AT_WUFC_MAG)
2171                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2172
2173                 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2174                            mac_ctrl_data);
2175
2176                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2177                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
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                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2183                 goto suspend_exit;
2184         }
2185 wol_dis:
2186
2187         /* WOL disabled */
2188         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2189
2190         /* pcie patch */
2191         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2192         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2193         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2194
2195         atl1e_force_ps(hw);
2196         hw->phy_configured = false; /* re-init PHY when resume */
2197
2198         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2199
2200 suspend_exit:
2201
2202         if (netif_running(netdev))
2203                 atl1e_free_irq(adapter);
2204
2205         pci_disable_device(pdev);
2206
2207         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2208
2209         return 0;
2210 }
2211
2212 #ifdef CONFIG_PM
2213 static int atl1e_resume(struct pci_dev *pdev)
2214 {
2215         struct net_device *netdev = pci_get_drvdata(pdev);
2216         struct atl1e_adapter *adapter = netdev_priv(netdev);
2217         u32 err;
2218
2219         pci_set_power_state(pdev, PCI_D0);
2220         pci_restore_state(pdev);
2221
2222         err = pci_enable_device(pdev);
2223         if (err) {
2224                 netdev_err(adapter->netdev,
2225                            "Cannot enable PCI device from suspend\n");
2226                 return err;
2227         }
2228
2229         pci_set_master(pdev);
2230
2231         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2232
2233         pci_enable_wake(pdev, PCI_D3hot, 0);
2234         pci_enable_wake(pdev, PCI_D3cold, 0);
2235
2236         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2237
2238         if (netif_running(netdev)) {
2239                 err = atl1e_request_irq(adapter);
2240                 if (err)
2241                         return err;
2242         }
2243
2244         atl1e_reset_hw(&adapter->hw);
2245
2246         if (netif_running(netdev))
2247                 atl1e_up(adapter);
2248
2249         netif_device_attach(netdev);
2250
2251         return 0;
2252 }
2253 #endif
2254
2255 static void atl1e_shutdown(struct pci_dev *pdev)
2256 {
2257         atl1e_suspend(pdev, PMSG_SUSPEND);
2258 }
2259
2260 static const struct net_device_ops atl1e_netdev_ops = {
2261         .ndo_open               = atl1e_open,
2262         .ndo_stop               = atl1e_close,
2263         .ndo_start_xmit         = atl1e_xmit_frame,
2264         .ndo_get_stats          = atl1e_get_stats,
2265         .ndo_set_rx_mode        = atl1e_set_multi,
2266         .ndo_validate_addr      = eth_validate_addr,
2267         .ndo_set_mac_address    = atl1e_set_mac_addr,
2268         .ndo_fix_features       = atl1e_fix_features,
2269         .ndo_set_features       = atl1e_set_features,
2270         .ndo_change_mtu         = atl1e_change_mtu,
2271         .ndo_do_ioctl           = atl1e_ioctl,
2272         .ndo_tx_timeout         = atl1e_tx_timeout,
2273 #ifdef CONFIG_NET_POLL_CONTROLLER
2274         .ndo_poll_controller    = atl1e_netpoll,
2275 #endif
2276
2277 };
2278
2279 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2280 {
2281         SET_NETDEV_DEV(netdev, &pdev->dev);
2282         pci_set_drvdata(pdev, netdev);
2283
2284         netdev->netdev_ops = &atl1e_netdev_ops;
2285
2286         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2287         atl1e_set_ethtool_ops(netdev);
2288
2289         netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2290                               NETIF_F_HW_VLAN_CTAG_RX;
2291         netdev->features = netdev->hw_features | NETIF_F_LLTX |
2292                            NETIF_F_HW_VLAN_CTAG_TX;
2293         /* not enabled by default */
2294         netdev->hw_features |= NETIF_F_RXALL | NETIF_F_RXFCS;
2295         return 0;
2296 }
2297
2298 /**
2299  * atl1e_probe - Device Initialization Routine
2300  * @pdev: PCI device information struct
2301  * @ent: entry in atl1e_pci_tbl
2302  *
2303  * Returns 0 on success, negative on failure
2304  *
2305  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2306  * The OS initialization, configuring of the adapter private structure,
2307  * and a hardware reset occur.
2308  */
2309 static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2310 {
2311         struct net_device *netdev;
2312         struct atl1e_adapter *adapter = NULL;
2313         static int cards_found;
2314
2315         int err = 0;
2316
2317         err = pci_enable_device(pdev);
2318         if (err) {
2319                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2320                 return err;
2321         }
2322
2323         /*
2324          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2325          * shared register for the high 32 bits, so only a single, aligned,
2326          * 4 GB physical address range can be used at a time.
2327          *
2328          * Supporting 64-bit DMA on this hardware is more trouble than it's
2329          * worth.  It is far easier to limit to 32-bit DMA than update
2330          * various kernel subsystems to support the mechanics required by a
2331          * fixed-high-32-bit system.
2332          */
2333         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2334             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2335                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2336                 goto err_dma;
2337         }
2338
2339         err = pci_request_regions(pdev, atl1e_driver_name);
2340         if (err) {
2341                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2342                 goto err_pci_reg;
2343         }
2344
2345         pci_set_master(pdev);
2346
2347         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2348         if (netdev == NULL) {
2349                 err = -ENOMEM;
2350                 goto err_alloc_etherdev;
2351         }
2352
2353         err = atl1e_init_netdev(netdev, pdev);
2354         if (err) {
2355                 netdev_err(netdev, "init netdevice failed\n");
2356                 goto err_init_netdev;
2357         }
2358         adapter = netdev_priv(netdev);
2359         adapter->bd_number = cards_found;
2360         adapter->netdev = netdev;
2361         adapter->pdev = pdev;
2362         adapter->hw.adapter = adapter;
2363         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2364         if (!adapter->hw.hw_addr) {
2365                 err = -EIO;
2366                 netdev_err(netdev, "cannot map device registers\n");
2367                 goto err_ioremap;
2368         }
2369
2370         /* init mii data */
2371         adapter->mii.dev = netdev;
2372         adapter->mii.mdio_read  = atl1e_mdio_read;
2373         adapter->mii.mdio_write = atl1e_mdio_write;
2374         adapter->mii.phy_id_mask = 0x1f;
2375         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2376
2377         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2378
2379         init_timer(&adapter->phy_config_timer);
2380         adapter->phy_config_timer.function = atl1e_phy_config;
2381         adapter->phy_config_timer.data = (unsigned long) adapter;
2382
2383         /* get user settings */
2384         atl1e_check_options(adapter);
2385         /*
2386          * Mark all PCI regions associated with PCI device
2387          * pdev as being reserved by owner atl1e_driver_name
2388          * Enables bus-mastering on the device and calls
2389          * pcibios_set_master to do the needed arch specific settings
2390          */
2391         atl1e_setup_pcicmd(pdev);
2392         /* setup the private structure */
2393         err = atl1e_sw_init(adapter);
2394         if (err) {
2395                 netdev_err(netdev, "net device private data init failed\n");
2396                 goto err_sw_init;
2397         }
2398
2399         /* Init GPHY as early as possible due to power saving issue  */
2400         atl1e_phy_init(&adapter->hw);
2401         /* reset the controller to
2402          * put the device in a known good starting state */
2403         err = atl1e_reset_hw(&adapter->hw);
2404         if (err) {
2405                 err = -EIO;
2406                 goto err_reset;
2407         }
2408
2409         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2410                 err = -EIO;
2411                 netdev_err(netdev, "get mac address failed\n");
2412                 goto err_eeprom;
2413         }
2414
2415         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2416         netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2417
2418         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2419         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2420         netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2421         err = register_netdev(netdev);
2422         if (err) {
2423                 netdev_err(netdev, "register netdevice failed\n");
2424                 goto err_register;
2425         }
2426
2427         /* assume we have no link for now */
2428         netif_stop_queue(netdev);
2429         netif_carrier_off(netdev);
2430
2431         cards_found++;
2432
2433         return 0;
2434
2435 err_reset:
2436 err_register:
2437 err_sw_init:
2438 err_eeprom:
2439         iounmap(adapter->hw.hw_addr);
2440 err_init_netdev:
2441 err_ioremap:
2442         free_netdev(netdev);
2443 err_alloc_etherdev:
2444         pci_release_regions(pdev);
2445 err_pci_reg:
2446 err_dma:
2447         pci_disable_device(pdev);
2448         return err;
2449 }
2450
2451 /**
2452  * atl1e_remove - Device Removal Routine
2453  * @pdev: PCI device information struct
2454  *
2455  * atl1e_remove is called by the PCI subsystem to alert the driver
2456  * that it should release a PCI device.  The could be caused by a
2457  * Hot-Plug event, or because the driver is going to be removed from
2458  * memory.
2459  */
2460 static void atl1e_remove(struct pci_dev *pdev)
2461 {
2462         struct net_device *netdev = pci_get_drvdata(pdev);
2463         struct atl1e_adapter *adapter = netdev_priv(netdev);
2464
2465         /*
2466          * flush_scheduled work may reschedule our watchdog task, so
2467          * explicitly disable watchdog tasks from being rescheduled
2468          */
2469         set_bit(__AT_DOWN, &adapter->flags);
2470
2471         atl1e_del_timer(adapter);
2472         atl1e_cancel_work(adapter);
2473
2474         unregister_netdev(netdev);
2475         atl1e_free_ring_resources(adapter);
2476         atl1e_force_ps(&adapter->hw);
2477         iounmap(adapter->hw.hw_addr);
2478         pci_release_regions(pdev);
2479         free_netdev(netdev);
2480         pci_disable_device(pdev);
2481 }
2482
2483 /**
2484  * atl1e_io_error_detected - called when PCI error is detected
2485  * @pdev: Pointer to PCI device
2486  * @state: The current pci connection state
2487  *
2488  * This function is called after a PCI bus error affecting
2489  * this device has been detected.
2490  */
2491 static pci_ers_result_t
2492 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2493 {
2494         struct net_device *netdev = pci_get_drvdata(pdev);
2495         struct atl1e_adapter *adapter = netdev_priv(netdev);
2496
2497         netif_device_detach(netdev);
2498
2499         if (state == pci_channel_io_perm_failure)
2500                 return PCI_ERS_RESULT_DISCONNECT;
2501
2502         if (netif_running(netdev))
2503                 atl1e_down(adapter);
2504
2505         pci_disable_device(pdev);
2506
2507         /* Request a slot slot reset. */
2508         return PCI_ERS_RESULT_NEED_RESET;
2509 }
2510
2511 /**
2512  * atl1e_io_slot_reset - called after the pci bus has been reset.
2513  * @pdev: Pointer to PCI device
2514  *
2515  * Restart the card from scratch, as if from a cold-boot. Implementation
2516  * resembles the first-half of the e1000_resume routine.
2517  */
2518 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2519 {
2520         struct net_device *netdev = pci_get_drvdata(pdev);
2521         struct atl1e_adapter *adapter = netdev_priv(netdev);
2522
2523         if (pci_enable_device(pdev)) {
2524                 netdev_err(adapter->netdev,
2525                            "Cannot re-enable PCI device after reset\n");
2526                 return PCI_ERS_RESULT_DISCONNECT;
2527         }
2528         pci_set_master(pdev);
2529
2530         pci_enable_wake(pdev, PCI_D3hot, 0);
2531         pci_enable_wake(pdev, PCI_D3cold, 0);
2532
2533         atl1e_reset_hw(&adapter->hw);
2534
2535         return PCI_ERS_RESULT_RECOVERED;
2536 }
2537
2538 /**
2539  * atl1e_io_resume - called when traffic can start flowing again.
2540  * @pdev: Pointer to PCI device
2541  *
2542  * This callback is called when the error recovery driver tells us that
2543  * its OK to resume normal operation. Implementation resembles the
2544  * second-half of the atl1e_resume routine.
2545  */
2546 static void atl1e_io_resume(struct pci_dev *pdev)
2547 {
2548         struct net_device *netdev = pci_get_drvdata(pdev);
2549         struct atl1e_adapter *adapter = netdev_priv(netdev);
2550
2551         if (netif_running(netdev)) {
2552                 if (atl1e_up(adapter)) {
2553                         netdev_err(adapter->netdev,
2554                                    "can't bring device back up after reset\n");
2555                         return;
2556                 }
2557         }
2558
2559         netif_device_attach(netdev);
2560 }
2561
2562 static const struct pci_error_handlers atl1e_err_handler = {
2563         .error_detected = atl1e_io_error_detected,
2564         .slot_reset = atl1e_io_slot_reset,
2565         .resume = atl1e_io_resume,
2566 };
2567
2568 static struct pci_driver atl1e_driver = {
2569         .name     = atl1e_driver_name,
2570         .id_table = atl1e_pci_tbl,
2571         .probe    = atl1e_probe,
2572         .remove   = atl1e_remove,
2573         /* Power Management Hooks */
2574 #ifdef CONFIG_PM
2575         .suspend  = atl1e_suspend,
2576         .resume   = atl1e_resume,
2577 #endif
2578         .shutdown = atl1e_shutdown,
2579         .err_handler = &atl1e_err_handler
2580 };
2581
2582 module_pci_driver(atl1e_driver);