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

   1 /*
   2  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1e.h"
  23
  24 #define DRV_VERSION "1.0.0.7-NAPI"
  25
  26 char atl1e_driver_name[] = "ATL1E";
  27 char atl1e_driver_version[] = DRV_VERSION;
  28 #define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
  29 /*
  30  * atl1e_pci_tbl - PCI Device ID Table
  31  *
  32  * Wildcard entries (PCI_ANY_ID) should come last
  33  * Last entry must be all 0s
  34  *
  35  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  36  *   Class, Class Mask, private data (not used) }
  37  */
  38 static const struct pci_device_id atl1e_pci_tbl[] = {
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
  41         /* required last entry */
  42         { 0 }
  43 };
  44 MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  45
  46 MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  47 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48 MODULE_LICENSE("GPL");
  49 MODULE_VERSION(DRV_VERSION);
  50
  51 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  52
  53 static const u16
  54 atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  55 {
  56         {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  57         {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  58         {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  59         {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  60 };
  61
  62 static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  63 {
  64         REG_RXF0_BASE_ADDR_HI,
  65         REG_RXF1_BASE_ADDR_HI,
  66         REG_RXF2_BASE_ADDR_HI,
  67         REG_RXF3_BASE_ADDR_HI
  68 };
  69
  70 static const u16
  71 atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  72 {
  73         {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  74         {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  75         {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  76         {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  77 };
  78
  79 static const u16
  80 atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  81 {
  82         {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  83         {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  84         {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  85         {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  86 };
  87
  88 static const u16 atl1e_pay_load_size[] = {
  89         128, 256, 512, 1024, 2048, 4096,
  90 };
  91
  92 /**
  93  * atl1e_irq_enable - Enable default interrupt generation settings
  94  * @adapter: board private structure
  95  */
  96 static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  97 {
  98         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  99                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 100                 AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
 101                 AT_WRITE_FLUSH(&adapter->hw);
 102         }
 103 }
 104
 105 /**
 106  * atl1e_irq_disable - Mask off interrupt generation on the NIC
 107  * @adapter: board private structure
 108  */
 109 static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
 110 {
 111         atomic_inc(&adapter->irq_sem);
 112         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 113         AT_WRITE_FLUSH(&adapter->hw);
 114         synchronize_irq(adapter->pdev->irq);
 115 }
 116
 117 /**
 118  * atl1e_irq_reset - reset interrupt confiure on the NIC
 119  * @adapter: board private structure
 120  */
 121 static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 122 {
 123         atomic_set(&adapter->irq_sem, 0);
 124         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 125         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 126         AT_WRITE_FLUSH(&adapter->hw);
 127 }
 128
 129 /**
 130  * atl1e_phy_config - Timer Call-back
 131  * @data: pointer to netdev cast into an unsigned long
 132  */
 133 static void atl1e_phy_config(unsigned long data)
 134 {
 135         struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
 136         struct atl1e_hw *hw = &adapter->hw;
 137         unsigned long flags;
 138
 139         spin_lock_irqsave(&adapter->mdio_lock, flags);
 140         atl1e_restart_autoneg(hw);
 141         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 142 }
 143
 144 void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 145 {
 146
 147         WARN_ON(in_interrupt());
 148         while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 149                 msleep(1);
 150         atl1e_down(adapter);
 151         atl1e_up(adapter);
 152         clear_bit(__AT_RESETTING, &adapter->flags);
 153 }
 154
 155 static void atl1e_reset_task(struct work_struct *work)
 156 {
 157         struct atl1e_adapter *adapter;
 158         adapter = container_of(work, struct atl1e_adapter, reset_task);
 159
 160         atl1e_reinit_locked(adapter);
 161 }
 162
 163 static int atl1e_check_link(struct atl1e_adapter *adapter)
 164 {
 165         struct atl1e_hw *hw = &adapter->hw;
 166         struct net_device *netdev = adapter->netdev;
 167         int err = 0;
 168         u16 speed, duplex, phy_data;
 169
 170         /* MII_BMSR must read twice */
 171         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 172         atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 173         if ((phy_data & BMSR_LSTATUS) == 0) {
 174                 /* link down */
 175                 if (netif_carrier_ok(netdev)) { /* old link state: Up */
 176                         u32 value;
 177                         /* disable rx */
 178                         value = AT_READ_REG(hw, REG_MAC_CTRL);
 179                         value &= ~MAC_CTRL_RX_EN;
 180                         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 181                         adapter->link_speed = SPEED_0;
 182                         netif_carrier_off(netdev);
 183                         netif_stop_queue(netdev);
 184                 }
 185         } else {
 186                 /* Link Up */
 187                 err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 188                 if (unlikely(err))
 189                         return err;
 190
 191                 /* link result is our setting */
 192                 if (adapter->link_speed != speed ||
 193                     adapter->link_duplex != duplex) {
 194                         adapter->link_speed  = speed;
 195                         adapter->link_duplex = duplex;
 196                         atl1e_setup_mac_ctrl(adapter);
 197                         netdev_info(netdev,
 198                                     "NIC Link is Up <%d Mbps %s Duplex>\n",
 199                                     adapter->link_speed,
 200                                     adapter->link_duplex == FULL_DUPLEX ?
 201                                     "Full" : "Half");
 202                 }
 203
 204                 if (!netif_carrier_ok(netdev)) {
 205                         /* Link down -> Up */
 206                         netif_carrier_on(netdev);
 207                         netif_wake_queue(netdev);
 208                 }
 209         }
 210         return 0;
 211 }
 212
 213 /**
 214  * atl1e_link_chg_task - deal with link change event Out of interrupt context
 215  * @netdev: network interface device structure
 216  */
 217 static void atl1e_link_chg_task(struct work_struct *work)
 218 {
 219         struct atl1e_adapter *adapter;
 220         unsigned long flags;
 221
 222         adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 223         spin_lock_irqsave(&adapter->mdio_lock, flags);
 224         atl1e_check_link(adapter);
 225         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 226 }
 227
 228 static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 229 {
 230         struct net_device *netdev = adapter->netdev;
 231         u16 phy_data = 0;
 232         u16 link_up = 0;
 233
 234         spin_lock(&adapter->mdio_lock);
 235         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 236         atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 237         spin_unlock(&adapter->mdio_lock);
 238         link_up = phy_data & BMSR_LSTATUS;
 239         /* notify upper layer link down ASAP */
 240         if (!link_up) {
 241                 if (netif_carrier_ok(netdev)) {
 242                         /* old link state: Up */
 243                         netdev_info(netdev, "NIC Link is Down\n");
 244                         adapter->link_speed = SPEED_0;
 245                         netif_stop_queue(netdev);
 246                 }
 247         }
 248         schedule_work(&adapter->link_chg_task);
 249 }
 250
 251 static void atl1e_del_timer(struct atl1e_adapter *adapter)
 252 {
 253         del_timer_sync(&adapter->phy_config_timer);
 254 }
 255
 256 static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 257 {
 258         cancel_work_sync(&adapter->reset_task);
 259         cancel_work_sync(&adapter->link_chg_task);
 260 }
 261
 262 /**
 263  * atl1e_tx_timeout - Respond to a Tx Hang
 264  * @netdev: network interface device structure
 265  */
 266 static void atl1e_tx_timeout(struct net_device *netdev)
 267 {
 268         struct atl1e_adapter *adapter = netdev_priv(netdev);
 269
 270         /* Do the reset outside of interrupt context */
 271         schedule_work(&adapter->reset_task);
 272 }
 273
 274 /**
 275  * atl1e_set_multi - Multicast and Promiscuous mode set
 276  * @netdev: network interface device structure
 277  *
 278  * The set_multi entry point is called whenever the multicast address
 279  * list or the network interface flags are updated.  This routine is
 280  * responsible for configuring the hardware for proper multicast,
 281  * promiscuous mode, and all-multi behavior.
 282  */
 283 static void atl1e_set_multi(struct net_device *netdev)
 284 {
 285         struct atl1e_adapter *adapter = netdev_priv(netdev);
 286         struct atl1e_hw *hw = &adapter->hw;
 287         struct netdev_hw_addr *ha;
 288         u32 mac_ctrl_data = 0;
 289         u32 hash_value;
 290
 291         /* Check for Promiscuous and All Multicast modes */
 292         mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 293
 294         if (netdev->flags & IFF_PROMISC) {
 295                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 296         } else if (netdev->flags & IFF_ALLMULTI) {
 297                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 298                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 299         } else {
 300                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 301         }
 302
 303         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 304
 305         /* clear the old settings from the multicast hash table */
 306         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 307         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 308
 309         /* comoute mc addresses' hash value ,and put it into hash table */
 310         netdev_for_each_mc_addr(ha, netdev) {
 311                 hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 312                 atl1e_hash_set(hw, hash_value);
 313         }
 314 }
 315
 316 static void __atl1e_rx_mode(netdev_features_t features, u32 *mac_ctrl_data)
 317 {
 318
 319         if (features & NETIF_F_RXALL) {
 320                 /* enable RX of ALL frames */
 321                 *mac_ctrl_data |= MAC_CTRL_DBG;
 322         } else {
 323                 /* disable RX of ALL frames */
 324                 *mac_ctrl_data &= ~MAC_CTRL_DBG;
 325         }
 326 }
 327
 328 static void atl1e_rx_mode(struct net_device *netdev,
 329         netdev_features_t features)
 330 {
 331         struct atl1e_adapter *adapter = netdev_priv(netdev);
 332         u32 mac_ctrl_data = 0;
 333
 334         netdev_dbg(adapter->netdev, "%s\n", __func__);
 335
 336         atl1e_irq_disable(adapter);
 337         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 338         __atl1e_rx_mode(features, &mac_ctrl_data);
 339         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 340         atl1e_irq_enable(adapter);
 341 }
 342
 343
 344 static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 345 {
 346         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 347                 /* enable VLAN tag insert/strip */
 348                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 349         } else {
 350                 /* disable VLAN tag insert/strip */
 351                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 352         }
 353 }
 354
 355 static void atl1e_vlan_mode(struct net_device *netdev,
 356         netdev_features_t features)
 357 {
 358         struct atl1e_adapter *adapter = netdev_priv(netdev);
 359         u32 mac_ctrl_data = 0;
 360
 361         netdev_dbg(adapter->netdev, "%s\n", __func__);
 362
 363         atl1e_irq_disable(adapter);
 364         mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 365         __atl1e_vlan_mode(features, &mac_ctrl_data);
 366         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 367         atl1e_irq_enable(adapter);
 368 }
 369
 370 static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 371 {
 372         netdev_dbg(adapter->netdev, "%s\n", __func__);
 373         atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
 374 }
 375
 376 /**
 377  * atl1e_set_mac - Change the Ethernet Address of the NIC
 378  * @netdev: network interface device structure
 379  * @p: pointer to an address structure
 380  *
 381  * Returns 0 on success, negative on failure
 382  */
 383 static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 384 {
 385         struct atl1e_adapter *adapter = netdev_priv(netdev);
 386         struct sockaddr *addr = p;
 387
 388         if (!is_valid_ether_addr(addr->sa_data))
 389                 return -EADDRNOTAVAIL;
 390
 391         if (netif_running(netdev))
 392                 return -EBUSY;
 393
 394         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 395         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 396
 397         atl1e_hw_set_mac_addr(&adapter->hw);
 398
 399         return 0;
 400 }
 401
 402 static netdev_features_t atl1e_fix_features(struct net_device *netdev,
 403         netdev_features_t features)
 404 {
 405         /*
 406          * Since there is no support for separate rx/tx vlan accel
 407          * enable/disable make sure tx flag is always in same state as rx.
 408          */
 409         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 410                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 411         else
 412                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 413
 414         return features;
 415 }
 416
 417 static int atl1e_set_features(struct net_device *netdev,
 418         netdev_features_t features)
 419 {
 420         netdev_features_t changed = netdev->features ^ features;
 421
 422         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 423                 atl1e_vlan_mode(netdev, features);
 424
 425         if (changed & NETIF_F_RXALL)
 426                 atl1e_rx_mode(netdev, features);
 427
 428
 429         return 0;
 430 }
 431
 432 /**
 433  * atl1e_change_mtu - Change the Maximum Transfer Unit
 434  * @netdev: network interface device structure
 435  * @new_mtu: new value for maximum frame size
 436  *
 437  * Returns 0 on success, negative on failure
 438  */
 439 static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 440 {
 441         struct atl1e_adapter *adapter = netdev_priv(netdev);
 442         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 443
 444         /* set MTU */
 445         if (netif_running(netdev)) {
 446                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 447                         msleep(1);
 448                 netdev->mtu = new_mtu;
 449                 adapter->hw.max_frame_size = new_mtu;
 450                 adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 451                 atl1e_down(adapter);
 452                 atl1e_up(adapter);
 453                 clear_bit(__AT_RESETTING, &adapter->flags);
 454         }
 455         return 0;
 456 }
 457
 458 /*
 459  *  caller should hold mdio_lock
 460  */
 461 static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 462 {
 463         struct atl1e_adapter *adapter = netdev_priv(netdev);
 464         u16 result;
 465
 466         atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 467         return result;
 468 }
 469
 470 static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 471                              int reg_num, int val)
 472 {
 473         struct atl1e_adapter *adapter = netdev_priv(netdev);
 474
 475         if (atl1e_write_phy_reg(&adapter->hw,
 476                                 reg_num & MDIO_REG_ADDR_MASK, val))
 477                 netdev_err(netdev, "write phy register failed\n");
 478 }
 479
 480 static int atl1e_mii_ioctl(struct net_device *netdev,
 481                            struct ifreq *ifr, int cmd)
 482 {
 483         struct atl1e_adapter *adapter = netdev_priv(netdev);
 484         struct mii_ioctl_data *data = if_mii(ifr);
 485         unsigned long flags;
 486         int retval = 0;
 487
 488         if (!netif_running(netdev))
 489                 return -EINVAL;
 490
 491         spin_lock_irqsave(&adapter->mdio_lock, flags);
 492         switch (cmd) {
 493         case SIOCGMIIPHY:
 494                 data->phy_id = 0;
 495                 break;
 496
 497         case SIOCGMIIREG:
 498                 if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 499                                     &data->val_out)) {
 500                         retval = -EIO;
 501                         goto out;
 502                 }
 503                 break;
 504
 505         case SIOCSMIIREG:
 506                 if (data->reg_num & ~(0x1F)) {
 507                         retval = -EFAULT;
 508                         goto out;
 509                 }
 510
 511                 netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 512                            data->reg_num, data->val_in);
 513                 if (atl1e_write_phy_reg(&adapter->hw,
 514                                      data->reg_num, data->val_in)) {
 515                         retval = -EIO;
 516                         goto out;
 517                 }
 518                 break;
 519
 520         default:
 521                 retval = -EOPNOTSUPP;
 522                 break;
 523         }
 524 out:
 525         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 526         return retval;
 527
 528 }
 529
 530 static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 531 {
 532         switch (cmd) {
 533         case SIOCGMIIPHY:
 534         case SIOCGMIIREG:
 535         case SIOCSMIIREG:
 536                 return atl1e_mii_ioctl(netdev, ifr, cmd);
 537         default:
 538                 return -EOPNOTSUPP;
 539         }
 540 }
 541
 542 static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 543 {
 544         u16 cmd;
 545
 546         pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 547         cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 548         cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 549         pci_write_config_word(pdev, PCI_COMMAND, cmd);
 550
 551         /*
 552          * some motherboards BIOS(PXE/EFI) driver may set PME
 553          * while they transfer control to OS (Windows/Linux)
 554          * so we should clear this bit before NIC work normally
 555          */
 556         pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 557         msleep(1);
 558 }
 559
 560 /**
 561  * atl1e_alloc_queues - Allocate memory for all rings
 562  * @adapter: board private structure to initialize
 563  *
 564  */
 565 static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
 566 {
 567         return 0;
 568 }
 569
 570 /**
 571  * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 572  * @adapter: board private structure to initialize
 573  *
 574  * atl1e_sw_init initializes the Adapter private data structure.
 575  * Fields are initialized based on PCI device information and
 576  * OS network device settings (MTU size).
 577  */
 578 static int atl1e_sw_init(struct atl1e_adapter *adapter)
 579 {
 580         struct atl1e_hw *hw   = &adapter->hw;
 581         struct pci_dev  *pdev = adapter->pdev;
 582         u32 phy_status_data = 0;
 583
 584         adapter->wol = 0;
 585         adapter->link_speed = SPEED_0;   /* hardware init */
 586         adapter->link_duplex = FULL_DUPLEX;
 587         adapter->num_rx_queues = 1;
 588
 589         /* PCI config space info */
 590         hw->vendor_id = pdev->vendor;
 591         hw->device_id = pdev->device;
 592         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 593         hw->subsystem_id = pdev->subsystem_device;
 594         hw->revision_id  = pdev->revision;
 595
 596         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 597
 598         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 599         /* nic type */
 600         if (hw->revision_id >= 0xF0) {
 601                 hw->nic_type = athr_l2e_revB;
 602         } else {
 603                 if (phy_status_data & PHY_STATUS_100M)
 604                         hw->nic_type = athr_l1e;
 605                 else
 606                         hw->nic_type = athr_l2e_revA;
 607         }
 608
 609         phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 610
 611         if (phy_status_data & PHY_STATUS_EMI_CA)
 612                 hw->emi_ca = true;
 613         else
 614                 hw->emi_ca = false;
 615
 616         hw->phy_configured = false;
 617         hw->preamble_len = 7;
 618         hw->max_frame_size = adapter->netdev->mtu;
 619         hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 620                                 VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 621
 622         hw->rrs_type = atl1e_rrs_disable;
 623         hw->indirect_tab = 0;
 624         hw->base_cpu = 0;
 625
 626         /* need confirm */
 627
 628         hw->ict = 50000;                 /* 100ms */
 629         hw->smb_timer = 200000;          /* 200ms  */
 630         hw->tpd_burst = 5;
 631         hw->rrd_thresh = 1;
 632         hw->tpd_thresh = adapter->tx_ring.count / 2;
 633         hw->rx_count_down = 4;  /* 2us resolution */
 634         hw->tx_count_down = hw->imt * 4 / 3;
 635         hw->dmar_block = atl1e_dma_req_1024;
 636         hw->dmaw_block = atl1e_dma_req_1024;
 637         hw->dmar_dly_cnt = 15;
 638         hw->dmaw_dly_cnt = 4;
 639
 640         if (atl1e_alloc_queues(adapter)) {
 641                 netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 642                 return -ENOMEM;
 643         }
 644
 645         atomic_set(&adapter->irq_sem, 1);
 646         spin_lock_init(&adapter->mdio_lock);
 647
 648         set_bit(__AT_DOWN, &adapter->flags);
 649
 650         return 0;
 651 }
 652
 653 /**
 654  * atl1e_clean_tx_ring - Free Tx-skb
 655  * @adapter: board private structure
 656  */
 657 static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 658 {
 659         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 660         struct atl1e_tx_buffer *tx_buffer = NULL;
 661         struct pci_dev *pdev = adapter->pdev;
 662         u16 index, ring_count;
 663
 664         if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 665                 return;
 666
 667         ring_count = tx_ring->count;
 668         /* first unmmap dma */
 669         for (index = 0; index < ring_count; index++) {
 670                 tx_buffer = &tx_ring->tx_buffer[index];
 671                 if (tx_buffer->dma) {
 672                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 673                                 pci_unmap_single(pdev, tx_buffer->dma,
 674                                         tx_buffer->length, PCI_DMA_TODEVICE);
 675                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 676                                 pci_unmap_page(pdev, tx_buffer->dma,
 677                                         tx_buffer->length, PCI_DMA_TODEVICE);
 678                         tx_buffer->dma = 0;
 679                 }
 680         }
 681         /* second free skb */
 682         for (index = 0; index < ring_count; index++) {
 683                 tx_buffer = &tx_ring->tx_buffer[index];
 684                 if (tx_buffer->skb) {
 685                         dev_kfree_skb_any(tx_buffer->skb);
 686                         tx_buffer->skb = NULL;
 687                 }
 688         }
 689         /* Zero out Tx-buffers */
 690         memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 691                                 ring_count);
 692         memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 693                                 ring_count);
 694 }
 695
 696 /**
 697  * atl1e_clean_rx_ring - Free rx-reservation skbs
 698  * @adapter: board private structure
 699  */
 700 static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 701 {
 702         struct atl1e_rx_ring *rx_ring =
 703                 &adapter->rx_ring;
 704         struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 705         u16 i, j;
 706
 707
 708         if (adapter->ring_vir_addr == NULL)
 709                 return;
 710         /* Zero out the descriptor ring */
 711         for (i = 0; i < adapter->num_rx_queues; i++) {
 712                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 713                         if (rx_page_desc[i].rx_page[j].addr != NULL) {
 714                                 memset(rx_page_desc[i].rx_page[j].addr, 0,
 715                                                 rx_ring->real_page_size);
 716                         }
 717                 }
 718         }
 719 }
 720
 721 static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 722 {
 723         *ring_size = ((u32)(adapter->tx_ring.count *
 724                      sizeof(struct atl1e_tpd_desc) + 7
 725                         /* tx ring, qword align */
 726                      + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 727                         adapter->num_rx_queues + 31
 728                         /* rx ring,  32 bytes align */
 729                      + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 730                         sizeof(u32) + 3));
 731                         /* tx, rx cmd, dword align   */
 732 }
 733
 734 static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 735 {
 736         struct atl1e_rx_ring *rx_ring = NULL;
 737
 738         rx_ring = &adapter->rx_ring;
 739
 740         rx_ring->real_page_size = adapter->rx_ring.page_size
 741                                  + adapter->hw.max_frame_size
 742                                  + ETH_HLEN + VLAN_HLEN
 743                                  + ETH_FCS_LEN;
 744         rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 745         atl1e_cal_ring_size(adapter, &adapter->ring_size);
 746
 747         adapter->ring_vir_addr = NULL;
 748         adapter->rx_ring.desc = NULL;
 749         rwlock_init(&adapter->tx_ring.tx_lock);
 750 }
 751
 752 /*
 753  * Read / Write Ptr Initialize:
 754  */
 755 static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 756 {
 757         struct atl1e_tx_ring *tx_ring = NULL;
 758         struct atl1e_rx_ring *rx_ring = NULL;
 759         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 760         int i, j;
 761
 762         tx_ring = &adapter->tx_ring;
 763         rx_ring = &adapter->rx_ring;
 764         rx_page_desc = rx_ring->rx_page_desc;
 765
 766         tx_ring->next_to_use = 0;
 767         atomic_set(&tx_ring->next_to_clean, 0);
 768
 769         for (i = 0; i < adapter->num_rx_queues; i++) {
 770                 rx_page_desc[i].rx_using  = 0;
 771                 rx_page_desc[i].rx_nxseq = 0;
 772                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 773                         *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 774                         rx_page_desc[i].rx_page[j].read_offset = 0;
 775                 }
 776         }
 777 }
 778
 779 /**
 780  * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 781  * @adapter: board private structure
 782  *
 783  * Free all transmit software resources
 784  */
 785 static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 786 {
 787         struct pci_dev *pdev = adapter->pdev;
 788
 789         atl1e_clean_tx_ring(adapter);
 790         atl1e_clean_rx_ring(adapter);
 791
 792         if (adapter->ring_vir_addr) {
 793                 pci_free_consistent(pdev, adapter->ring_size,
 794                                 adapter->ring_vir_addr, adapter->ring_dma);
 795                 adapter->ring_vir_addr = NULL;
 796         }
 797
 798         if (adapter->tx_ring.tx_buffer) {
 799                 kfree(adapter->tx_ring.tx_buffer);
 800                 adapter->tx_ring.tx_buffer = NULL;
 801         }
 802 }
 803
 804 /**
 805  * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 806  * @adapter: board private structure
 807  *
 808  * Return 0 on success, negative on failure
 809  */
 810 static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 811 {
 812         struct pci_dev *pdev = adapter->pdev;
 813         struct atl1e_tx_ring *tx_ring;
 814         struct atl1e_rx_ring *rx_ring;
 815         struct atl1e_rx_page_desc  *rx_page_desc;
 816         int size, i, j;
 817         u32 offset = 0;
 818         int err = 0;
 819
 820         if (adapter->ring_vir_addr != NULL)
 821                 return 0; /* alloced already */
 822
 823         tx_ring = &adapter->tx_ring;
 824         rx_ring = &adapter->rx_ring;
 825
 826         /* real ring DMA buffer */
 827
 828         size = adapter->ring_size;
 829         adapter->ring_vir_addr = pci_zalloc_consistent(pdev, adapter->ring_size,
 830                                                        &adapter->ring_dma);
 831         if (adapter->ring_vir_addr == NULL) {
 832                 netdev_err(adapter->netdev,
 833                            "pci_alloc_consistent failed, size = D%d\n", size);
 834                 return -ENOMEM;
 835         }
 836
 837         rx_page_desc = rx_ring->rx_page_desc;
 838
 839         /* Init TPD Ring */
 840         tx_ring->dma = roundup(adapter->ring_dma, 8);
 841         offset = tx_ring->dma - adapter->ring_dma;
 842         tx_ring->desc = adapter->ring_vir_addr + offset;
 843         size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 844         tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 845         if (tx_ring->tx_buffer == NULL) {
 846                 err = -ENOMEM;
 847                 goto failed;
 848         }
 849
 850         /* Init RXF-Pages */
 851         offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 852         offset = roundup(offset, 32);
 853
 854         for (i = 0; i < adapter->num_rx_queues; i++) {
 855                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 856                         rx_page_desc[i].rx_page[j].dma =
 857                                 adapter->ring_dma + offset;
 858                         rx_page_desc[i].rx_page[j].addr =
 859                                 adapter->ring_vir_addr + offset;
 860                         offset += rx_ring->real_page_size;
 861                 }
 862         }
 863
 864         /* Init CMB dma address */
 865         tx_ring->cmb_dma = adapter->ring_dma + offset;
 866         tx_ring->cmb = adapter->ring_vir_addr + offset;
 867         offset += sizeof(u32);
 868
 869         for (i = 0; i < adapter->num_rx_queues; i++) {
 870                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 871                         rx_page_desc[i].rx_page[j].write_offset_dma =
 872                                 adapter->ring_dma + offset;
 873                         rx_page_desc[i].rx_page[j].write_offset_addr =
 874                                 adapter->ring_vir_addr + offset;
 875                         offset += sizeof(u32);
 876                 }
 877         }
 878
 879         if (unlikely(offset > adapter->ring_size)) {
 880                 netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 881                            offset, adapter->ring_size);
 882                 err = -1;
 883                 goto failed;
 884         }
 885
 886         return 0;
 887 failed:
 888         if (adapter->ring_vir_addr != NULL) {
 889                 pci_free_consistent(pdev, adapter->ring_size,
 890                                 adapter->ring_vir_addr, adapter->ring_dma);
 891                 adapter->ring_vir_addr = NULL;
 892         }
 893         return err;
 894 }
 895
 896 static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
 897 {
 898
 899         struct atl1e_hw *hw = &adapter->hw;
 900         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
 901         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 902         struct atl1e_rx_page_desc *rx_page_desc = NULL;
 903         int i, j;
 904
 905         AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 906                         (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 907         AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 908                         (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 909         AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 910         AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 911                         (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 912
 913         rx_page_desc = rx_ring->rx_page_desc;
 914         /* RXF Page Physical address / Page Length */
 915         for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 916                 AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 917                                  (u32)((adapter->ring_dma &
 918                                  AT_DMA_HI_ADDR_MASK) >> 32));
 919                 for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 920                         u32 page_phy_addr;
 921                         u32 offset_phy_addr;
 922
 923                         page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 924                         offset_phy_addr =
 925                                    rx_page_desc[i].rx_page[j].write_offset_dma;
 926
 927                         AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 928                                         page_phy_addr & AT_DMA_LO_ADDR_MASK);
 929                         AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 930                                         offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 931                         AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 932                 }
 933         }
 934         /* Page Length */
 935         AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 936         /* Load all of base address above */
 937         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 938 }
 939
 940 static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 941 {
 942         struct atl1e_hw *hw = &adapter->hw;
 943         u32 dev_ctrl_data = 0;
 944         u32 max_pay_load = 0;
 945         u32 jumbo_thresh = 0;
 946         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 947
 948         /* configure TXQ param */
 949         if (hw->nic_type != athr_l2e_revB) {
 950                 extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 951                 if (hw->max_frame_size <= 1500) {
 952                         jumbo_thresh = hw->max_frame_size + extra_size;
 953                 } else if (hw->max_frame_size < 6*1024) {
 954                         jumbo_thresh =
 955                                 (hw->max_frame_size + extra_size) * 2 / 3;
 956                 } else {
 957                         jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 958                 }
 959                 AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 960         }
 961
 962         dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 963
 964         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 965                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
 966
 967         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 968
 969         max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 970                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 971         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 972
 973         if (hw->nic_type != athr_l2e_revB)
 974                 AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 975                               atl1e_pay_load_size[hw->dmar_block]);
 976         /* enable TXQ */
 977         AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 978                         (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 979                          << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 980                         | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 981 }
 982
 983 static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 984 {
 985         struct atl1e_hw *hw = &adapter->hw;
 986         u32 rxf_len  = 0;
 987         u32 rxf_low  = 0;
 988         u32 rxf_high = 0;
 989         u32 rxf_thresh_data = 0;
 990         u32 rxq_ctrl_data = 0;
 991
 992         if (hw->nic_type != athr_l2e_revB) {
 993                 AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 994                               (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 995                               RXQ_JMBOSZ_TH_SHIFT |
 996                               (1 & RXQ_JMBO_LKAH_MASK) <<
 997                               RXQ_JMBO_LKAH_SHIFT));
 998
 999                 rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
1000                 rxf_high = rxf_len * 4 / 5;
1001                 rxf_low  = rxf_len / 5;
1002                 rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
1003                                   << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1004                                   ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
1005                                   << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1006
1007                 AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
1008         }
1009
1010         /* RRS */
1011         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1012         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1013
1014         if (hw->rrs_type & atl1e_rrs_ipv4)
1015                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1016
1017         if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1018                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1019
1020         if (hw->rrs_type & atl1e_rrs_ipv6)
1021                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1022
1023         if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1024                 rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1025
1026         if (hw->rrs_type != atl1e_rrs_disable)
1027                 rxq_ctrl_data |=
1028                         (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1029
1030         rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1031                          RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1032
1033         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1034 }
1035
1036 static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1037 {
1038         struct atl1e_hw *hw = &adapter->hw;
1039         u32 dma_ctrl_data = 0;
1040
1041         dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1042         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1043                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1044         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1045                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1046         dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1047         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1048                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1049         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1050                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1051
1052         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1053 }
1054
1055 static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1056 {
1057         u32 value;
1058         struct atl1e_hw *hw = &adapter->hw;
1059         struct net_device *netdev = adapter->netdev;
1060
1061         /* Config MAC CTRL Register */
1062         value = MAC_CTRL_TX_EN |
1063                 MAC_CTRL_RX_EN ;
1064
1065         if (FULL_DUPLEX == adapter->link_duplex)
1066                 value |= MAC_CTRL_DUPLX;
1067
1068         value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1069                           MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1070                           MAC_CTRL_SPEED_SHIFT);
1071         value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1072
1073         value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1074         value |= (((u32)adapter->hw.preamble_len &
1075                   MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1076
1077         __atl1e_vlan_mode(netdev->features, &value);
1078
1079         value |= MAC_CTRL_BC_EN;
1080         if (netdev->flags & IFF_PROMISC)
1081                 value |= MAC_CTRL_PROMIS_EN;
1082         if (netdev->flags & IFF_ALLMULTI)
1083                 value |= MAC_CTRL_MC_ALL_EN;
1084         if (netdev->features & NETIF_F_RXALL)
1085                 value |= MAC_CTRL_DBG;
1086         AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1087 }
1088
1089 /**
1090  * atl1e_configure - Configure Transmit&Receive Unit after Reset
1091  * @adapter: board private structure
1092  *
1093  * Configure the Tx /Rx unit of the MAC after a reset.
1094  */
1095 static int atl1e_configure(struct atl1e_adapter *adapter)
1096 {
1097         struct atl1e_hw *hw = &adapter->hw;
1098
1099         u32 intr_status_data = 0;
1100
1101         /* clear interrupt status */
1102         AT_WRITE_REG(hw, REG_ISR, ~0);
1103
1104         /* 1. set MAC Address */
1105         atl1e_hw_set_mac_addr(hw);
1106
1107         /* 2. Init the Multicast HASH table done by set_muti */
1108
1109         /* 3. Clear any WOL status */
1110         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1111
1112         /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1113          *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1114          *    High 32bits memory */
1115         atl1e_configure_des_ring(adapter);
1116
1117         /* 5. set Interrupt Moderator Timer */
1118         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1119         AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1120         AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1121                         MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1122
1123         /* 6. rx/tx threshold to trig interrupt */
1124         AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1125         AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1126         AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1127         AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1128
1129         /* 7. set Interrupt Clear Timer */
1130         AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1131
1132         /* 8. set MTU */
1133         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1134                         VLAN_HLEN + ETH_FCS_LEN);
1135
1136         /* 9. config TXQ early tx threshold */
1137         atl1e_configure_tx(adapter);
1138
1139         /* 10. config RXQ */
1140         atl1e_configure_rx(adapter);
1141
1142         /* 11. config  DMA Engine */
1143         atl1e_configure_dma(adapter);
1144
1145         /* 12. smb timer to trig interrupt */
1146         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1147
1148         intr_status_data = AT_READ_REG(hw, REG_ISR);
1149         if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1150                 netdev_err(adapter->netdev,
1151                            "atl1e_configure failed, PCIE phy link down\n");
1152                 return -1;
1153         }
1154
1155         AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1156         return 0;
1157 }
1158
1159 /**
1160  * atl1e_get_stats - Get System Network Statistics
1161  * @netdev: network interface device structure
1162  *
1163  * Returns the address of the device statistics structure.
1164  * The statistics are actually updated from the timer callback.
1165  */
1166 static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1167 {
1168         struct atl1e_adapter *adapter = netdev_priv(netdev);
1169         struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1170         struct net_device_stats *net_stats = &netdev->stats;
1171
1172         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1173         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1174         net_stats->multicast  = hw_stats->rx_mcast;
1175         net_stats->collisions = hw_stats->tx_1_col +
1176                                 hw_stats->tx_2_col +
1177                                 hw_stats->tx_late_col +
1178                                 hw_stats->tx_abort_col;
1179
1180         net_stats->rx_errors  = hw_stats->rx_frag +
1181                                 hw_stats->rx_fcs_err +
1182                                 hw_stats->rx_len_err +
1183                                 hw_stats->rx_sz_ov +
1184                                 hw_stats->rx_rrd_ov +
1185                                 hw_stats->rx_align_err +
1186                                 hw_stats->rx_rxf_ov;
1187
1188         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1189         net_stats->rx_length_errors = hw_stats->rx_len_err;
1190         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1191         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1192         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1193
1194         net_stats->tx_errors = hw_stats->tx_late_col +
1195                                hw_stats->tx_abort_col +
1196                                hw_stats->tx_underrun +
1197                                hw_stats->tx_trunc;
1198
1199         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1200         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1201         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1202
1203         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1204         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1205
1206         return net_stats;
1207 }
1208
1209 static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1210 {
1211         u16 hw_reg_addr = 0;
1212         unsigned long *stats_item = NULL;
1213
1214         /* update rx status */
1215         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1216         stats_item  = &adapter->hw_stats.rx_ok;
1217         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1218                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1219                 stats_item++;
1220                 hw_reg_addr += 4;
1221         }
1222         /* update tx status */
1223         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1224         stats_item  = &adapter->hw_stats.tx_ok;
1225         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1226                 *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1227                 stats_item++;
1228                 hw_reg_addr += 4;
1229         }
1230 }
1231
1232 static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1233 {
1234         u16 phy_data;
1235
1236         spin_lock(&adapter->mdio_lock);
1237         atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1238         spin_unlock(&adapter->mdio_lock);
1239 }
1240
1241 static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1242 {
1243         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1244         struct atl1e_tx_buffer *tx_buffer = NULL;
1245         u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1246         u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1247
1248         while (next_to_clean != hw_next_to_clean) {
1249                 tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1250                 if (tx_buffer->dma) {
1251                         if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1252                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1253                                         tx_buffer->length, PCI_DMA_TODEVICE);
1254                         else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1255                                 pci_unmap_page(adapter->pdev, tx_buffer->dma,
1256                                         tx_buffer->length, PCI_DMA_TODEVICE);
1257                         tx_buffer->dma = 0;
1258                 }
1259
1260                 if (tx_buffer->skb) {
1261                         dev_kfree_skb_irq(tx_buffer->skb);
1262                         tx_buffer->skb = NULL;
1263                 }
1264
1265                 if (++next_to_clean == tx_ring->count)
1266                         next_to_clean = 0;
1267         }
1268
1269         atomic_set(&tx_ring->next_to_clean, next_to_clean);
1270
1271         if (netif_queue_stopped(adapter->netdev) &&
1272                         netif_carrier_ok(adapter->netdev)) {
1273                 netif_wake_queue(adapter->netdev);
1274         }
1275
1276         return true;
1277 }
1278
1279 /**
1280  * atl1e_intr - Interrupt Handler
1281  * @irq: interrupt number
1282  * @data: pointer to a network interface device structure
1283  */
1284 static irqreturn_t atl1e_intr(int irq, void *data)
1285 {
1286         struct net_device *netdev  = data;
1287         struct atl1e_adapter *adapter = netdev_priv(netdev);
1288         struct atl1e_hw *hw = &adapter->hw;
1289         int max_ints = AT_MAX_INT_WORK;
1290         int handled = IRQ_NONE;
1291         u32 status;
1292
1293         do {
1294                 status = AT_READ_REG(hw, REG_ISR);
1295                 if ((status & IMR_NORMAL_MASK) == 0 ||
1296                                 (status & ISR_DIS_INT) != 0) {
1297                         if (max_ints != AT_MAX_INT_WORK)
1298                                 handled = IRQ_HANDLED;
1299                         break;
1300                 }
1301                 /* link event */
1302                 if (status & ISR_GPHY)
1303                         atl1e_clear_phy_int(adapter);
1304                 /* Ack ISR */
1305                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1306
1307                 handled = IRQ_HANDLED;
1308                 /* check if PCIE PHY Link down */
1309                 if (status & ISR_PHY_LINKDOWN) {
1310                         netdev_err(adapter->netdev,
1311                                    "pcie phy linkdown %x\n", status);
1312                         if (netif_running(adapter->netdev)) {
1313                                 /* reset MAC */
1314                                 atl1e_irq_reset(adapter);
1315                                 schedule_work(&adapter->reset_task);
1316                                 break;
1317                         }
1318                 }
1319
1320                 /* check if DMA read/write error */
1321                 if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1322                         netdev_err(adapter->netdev,
1323                                    "PCIE DMA RW error (status = 0x%x)\n",
1324                                    status);
1325                         atl1e_irq_reset(adapter);
1326                         schedule_work(&adapter->reset_task);
1327                         break;
1328                 }
1329
1330                 if (status & ISR_SMB)
1331                         atl1e_update_hw_stats(adapter);
1332
1333                 /* link event */
1334                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1335                         netdev->stats.tx_carrier_errors++;
1336                         atl1e_link_chg_event(adapter);
1337                         break;
1338                 }
1339
1340                 /* transmit event */
1341                 if (status & ISR_TX_EVENT)
1342                         atl1e_clean_tx_irq(adapter);
1343
1344                 if (status & ISR_RX_EVENT) {
1345                         /*
1346                          * disable rx interrupts, without
1347                          * the synchronize_irq bit
1348                          */
1349                         AT_WRITE_REG(hw, REG_IMR,
1350                                      IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1351                         AT_WRITE_FLUSH(hw);
1352                         if (likely(napi_schedule_prep(
1353                                    &adapter->napi)))
1354                                 __napi_schedule(&adapter->napi);
1355                 }
1356         } while (--max_ints > 0);
1357         /* re-enable Interrupt*/
1358         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1359
1360         return handled;
1361 }
1362
1363 static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1364                   struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1365 {
1366         u8 *packet = (u8 *)(prrs + 1);
1367         struct iphdr *iph;
1368         u16 head_len = ETH_HLEN;
1369         u16 pkt_flags;
1370         u16 err_flags;
1371
1372         skb_checksum_none_assert(skb);
1373         pkt_flags = prrs->pkt_flag;
1374         err_flags = prrs->err_flag;
1375         if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1376                 ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1377                 if (pkt_flags & RRS_IS_IPV4) {
1378                         if (pkt_flags & RRS_IS_802_3)
1379                                 head_len += 8;
1380                         iph = (struct iphdr *) (packet + head_len);
1381                         if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1382                                 goto hw_xsum;
1383                 }
1384                 if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1385                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1386                         return;
1387                 }
1388         }
1389
1390 hw_xsum :
1391         return;
1392 }
1393
1394 static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1395                                                u8 que)
1396 {
1397         struct atl1e_rx_page_desc *rx_page_desc =
1398                 (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1399         u8 rx_using = rx_page_desc[que].rx_using;
1400
1401         return &(rx_page_desc[que].rx_page[rx_using]);
1402 }
1403
1404 static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1405                    int *work_done, int work_to_do)
1406 {
1407         struct net_device *netdev  = adapter->netdev;
1408         struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1409         struct atl1e_rx_page_desc *rx_page_desc =
1410                 (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1411         struct sk_buff *skb = NULL;
1412         struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1413         u32 packet_size, write_offset;
1414         struct atl1e_recv_ret_status *prrs;
1415
1416         write_offset = *(rx_page->write_offset_addr);
1417         if (likely(rx_page->read_offset < write_offset)) {
1418                 do {
1419                         if (*work_done >= work_to_do)
1420                                 break;
1421                         (*work_done)++;
1422                         /* get new packet's  rrs */
1423                         prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1424                                                  rx_page->read_offset);
1425                         /* check sequence number */
1426                         if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1427                                 netdev_err(netdev,
1428                                            "rx sequence number error (rx=%d) (expect=%d)\n",
1429                                            prrs->seq_num,
1430                                            rx_page_desc[que].rx_nxseq);
1431                                 rx_page_desc[que].rx_nxseq++;
1432                                 /* just for debug use */
1433                                 AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1434                                              (((u32)prrs->seq_num) << 16) |
1435                                              rx_page_desc[que].rx_nxseq);
1436                                 goto fatal_err;
1437                         }
1438                         rx_page_desc[que].rx_nxseq++;
1439
1440                         /* error packet */
1441                         if ((prrs->pkt_flag & RRS_IS_ERR_FRAME) &&
1442                             !(netdev->features & NETIF_F_RXALL)) {
1443                                 if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1444                                         RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1445                                         RRS_ERR_TRUNC)) {
1446                                 /* hardware error, discard this packet*/
1447                                         netdev_err(netdev,
1448                                                    "rx packet desc error %x\n",
1449                                                    *((u32 *)prrs + 1));
1450                                         goto skip_pkt;
1451                                 }
1452                         }
1453
1454                         packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1455                                         RRS_PKT_SIZE_MASK);
1456                         if (likely(!(netdev->features & NETIF_F_RXFCS)))
1457                                 packet_size -= 4; /* CRC */
1458
1459                         skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1460                         if (skb == NULL)
1461                                 goto skip_pkt;
1462
1463                         memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1464                         skb_put(skb, packet_size);
1465                         skb->protocol = eth_type_trans(skb, netdev);
1466                         atl1e_rx_checksum(adapter, skb, prrs);
1467
1468                         if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1469                                 u16 vlan_tag = (prrs->vtag >> 4) |
1470                                                ((prrs->vtag & 7) << 13) |
1471                                                ((prrs->vtag & 8) << 9);
1472                                 netdev_dbg(netdev,
1473                                            "RXD VLAN TAG<RRD>=0x%04x\n",
1474                                            prrs->vtag);
1475                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1476                         }
1477                         napi_gro_receive(&adapter->napi, skb);
1478
1479 skip_pkt:
1480         /* skip current packet whether it's ok or not. */
1481                         rx_page->read_offset +=
1482                                 (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1483                                 RRS_PKT_SIZE_MASK) +
1484                                 sizeof(struct atl1e_recv_ret_status) + 31) &
1485                                                 0xFFFFFFE0);
1486
1487                         if (rx_page->read_offset >= rx_ring->page_size) {
1488                                 /* mark this page clean */
1489                                 u16 reg_addr;
1490                                 u8  rx_using;
1491
1492                                 rx_page->read_offset =
1493                                         *(rx_page->write_offset_addr) = 0;
1494                                 rx_using = rx_page_desc[que].rx_using;
1495                                 reg_addr =
1496                                         atl1e_rx_page_vld_regs[que][rx_using];
1497                                 AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1498                                 rx_page_desc[que].rx_using ^= 1;
1499                                 rx_page = atl1e_get_rx_page(adapter, que);
1500                         }
1501                         write_offset = *(rx_page->write_offset_addr);
1502                 } while (rx_page->read_offset < write_offset);
1503         }
1504
1505         return;
1506
1507 fatal_err:
1508         if (!test_bit(__AT_DOWN, &adapter->flags))
1509                 schedule_work(&adapter->reset_task);
1510 }
1511
1512 /**
1513  * atl1e_clean - NAPI Rx polling callback
1514  */
1515 static int atl1e_clean(struct napi_struct *napi, int budget)
1516 {
1517         struct atl1e_adapter *adapter =
1518                         container_of(napi, struct atl1e_adapter, napi);
1519         u32 imr_data;
1520         int work_done = 0;
1521
1522         /* Keep link state information with original netdev */
1523         if (!netif_carrier_ok(adapter->netdev))
1524                 goto quit_polling;
1525
1526         atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1527
1528         /* If no Tx and not enough Rx work done, exit the polling mode */
1529         if (work_done < budget) {
1530 quit_polling:
1531                 napi_complete_done(napi, work_done);
1532                 imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1533                 AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1534                 /* test debug */
1535                 if (test_bit(__AT_DOWN, &adapter->flags)) {
1536                         atomic_dec(&adapter->irq_sem);
1537                         netdev_err(adapter->netdev,
1538                                    "atl1e_clean is called when AT_DOWN\n");
1539                 }
1540                 /* reenable RX intr */
1541                 /*atl1e_irq_enable(adapter); */
1542
1543         }
1544         return work_done;
1545 }
1546
1547 #ifdef CONFIG_NET_POLL_CONTROLLER
1548
1549 /*
1550  * Polling 'interrupt' - used by things like netconsole to send skbs
1551  * without having to re-enable interrupts. It's not called while
1552  * the interrupt routine is executing.
1553  */
1554 static void atl1e_netpoll(struct net_device *netdev)
1555 {
1556         struct atl1e_adapter *adapter = netdev_priv(netdev);
1557
1558         disable_irq(adapter->pdev->irq);
1559         atl1e_intr(adapter->pdev->irq, netdev);
1560         enable_irq(adapter->pdev->irq);
1561 }
1562 #endif
1563
1564 static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1565 {
1566         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1567         u16 next_to_use = 0;
1568         u16 next_to_clean = 0;
1569
1570         next_to_clean = atomic_read(&tx_ring->next_to_clean);
1571         next_to_use   = tx_ring->next_to_use;
1572
1573         return (u16)(next_to_clean > next_to_use) ?
1574                 (next_to_clean - next_to_use - 1) :
1575                 (tx_ring->count + next_to_clean - next_to_use - 1);
1576 }
1577
1578 /*
1579  * get next usable tpd
1580  * Note: should call atl1e_tdp_avail to make sure
1581  * there is enough tpd to use
1582  */
1583 static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1584 {
1585         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1586         u16 next_to_use = 0;
1587
1588         next_to_use = tx_ring->next_to_use;
1589         if (++tx_ring->next_to_use == tx_ring->count)
1590                 tx_ring->next_to_use = 0;
1591
1592         memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1593         return &tx_ring->desc[next_to_use];
1594 }
1595
1596 static struct atl1e_tx_buffer *
1597 atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1598 {
1599         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1600
1601         return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1602 }
1603
1604 /* Calculate the transmit packet descript needed*/
1605 static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1606 {
1607         int i = 0;
1608         u16 tpd_req = 1;
1609         u16 fg_size = 0;
1610         u16 proto_hdr_len = 0;
1611
1612         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1613                 fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1614                 tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1615         }
1616
1617         if (skb_is_gso(skb)) {
1618                 if (skb->protocol == htons(ETH_P_IP) ||
1619                    (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1620                         proto_hdr_len = skb_transport_offset(skb) +
1621                                         tcp_hdrlen(skb);
1622                         if (proto_hdr_len < skb_headlen(skb)) {
1623                                 tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1624                                            MAX_TX_BUF_LEN - 1) >>
1625                                            MAX_TX_BUF_SHIFT);
1626                         }
1627                 }
1628
1629         }
1630         return tpd_req;
1631 }
1632
1633 static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1634                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1635 {
1636         unsigned short offload_type;
1637         u8 hdr_len;
1638         u32 real_len;
1639
1640         if (skb_is_gso(skb)) {
1641                 int err;
1642
1643                 err = skb_cow_head(skb, 0);
1644                 if (err < 0)
1645                         return err;
1646
1647                 offload_type = skb_shinfo(skb)->gso_type;
1648
1649                 if (offload_type & SKB_GSO_TCPV4) {
1650                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1651                                         + ntohs(ip_hdr(skb)->tot_len));
1652
1653                         if (real_len < skb->len) {
1654                                 err = pskb_trim(skb, real_len);
1655                                 if (err)
1656                                         return err;
1657                         }
1658
1659                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1660                         if (unlikely(skb->len == hdr_len)) {
1661                                 /* only xsum need */
1662                                 netdev_warn(adapter->netdev,
1663                                             "IPV4 tso with zero data??\n");
1664                                 goto check_sum;
1665                         } else {
1666                                 ip_hdr(skb)->check = 0;
1667                                 ip_hdr(skb)->tot_len = 0;
1668                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1669                                                         ip_hdr(skb)->saddr,
1670                                                         ip_hdr(skb)->daddr,
1671                                                         0, IPPROTO_TCP, 0);
1672                                 tpd->word3 |= (ip_hdr(skb)->ihl &
1673                                         TDP_V4_IPHL_MASK) <<
1674                                         TPD_V4_IPHL_SHIFT;
1675                                 tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1676                                         TPD_TCPHDRLEN_MASK) <<
1677                                         TPD_TCPHDRLEN_SHIFT;
1678                                 tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1679                                         TPD_MSS_MASK) << TPD_MSS_SHIFT;
1680                                 tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1681                         }
1682                         return 0;
1683                 }
1684         }
1685
1686 check_sum:
1687         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1688                 u8 css, cso;
1689
1690                 cso = skb_checksum_start_offset(skb);
1691                 if (unlikely(cso & 0x1)) {
1692                         netdev_err(adapter->netdev,
1693                                    "payload offset should not ant event number\n");
1694                         return -1;
1695                 } else {
1696                         css = cso + skb->csum_offset;
1697                         tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1698                                         TPD_PLOADOFFSET_SHIFT;
1699                         tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1700                                         TPD_CCSUMOFFSET_SHIFT;
1701                         tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1702                 }
1703         }
1704
1705         return 0;
1706 }
1707
1708 static int atl1e_tx_map(struct atl1e_adapter *adapter,
1709                         struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1710 {
1711         struct atl1e_tpd_desc *use_tpd = NULL;
1712         struct atl1e_tx_buffer *tx_buffer = NULL;
1713         u16 buf_len = skb_headlen(skb);
1714         u16 map_len = 0;
1715         u16 mapped_len = 0;
1716         u16 hdr_len = 0;
1717         u16 nr_frags;
1718         u16 f;
1719         int segment;
1720         int ring_start = adapter->tx_ring.next_to_use;
1721         int ring_end;
1722
1723         nr_frags = skb_shinfo(skb)->nr_frags;
1724         segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1725         if (segment) {
1726                 /* TSO */
1727                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1728                 use_tpd = tpd;
1729
1730                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1731                 tx_buffer->length = map_len;
1732                 tx_buffer->dma = pci_map_single(adapter->pdev,
1733                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
1734                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1735                         return -ENOSPC;
1736
1737                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1738                 mapped_len += map_len;
1739                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1740                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1741                         ((cpu_to_le32(tx_buffer->length) &
1742                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1743         }
1744
1745         while (mapped_len < buf_len) {
1746                 /* mapped_len == 0, means we should use the first tpd,
1747                    which is given by caller  */
1748                 if (mapped_len == 0) {
1749                         use_tpd = tpd;
1750                 } else {
1751                         use_tpd = atl1e_get_tpd(adapter);
1752                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1753                 }
1754                 tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1755                 tx_buffer->skb = NULL;
1756
1757                 tx_buffer->length = map_len =
1758                         ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1759                         MAX_TX_BUF_LEN : (buf_len - mapped_len);
1760                 tx_buffer->dma =
1761                         pci_map_single(adapter->pdev, skb->data + mapped_len,
1762                                         map_len, PCI_DMA_TODEVICE);
1763
1764                 if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1765                         /* We need to unwind the mappings we've done */
1766                         ring_end = adapter->tx_ring.next_to_use;
1767                         adapter->tx_ring.next_to_use = ring_start;
1768                         while (adapter->tx_ring.next_to_use != ring_end) {
1769                                 tpd = atl1e_get_tpd(adapter);
1770                                 tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1771                                 pci_unmap_single(adapter->pdev, tx_buffer->dma,
1772                                                  tx_buffer->length, PCI_DMA_TODEVICE);
1773                         }
1774                         /* Reset the tx rings next pointer */
1775                         adapter->tx_ring.next_to_use = ring_start;
1776                         return -ENOSPC;
1777                 }
1778
1779                 ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1780                 mapped_len  += map_len;
1781                 use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1782                 use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1783                         ((cpu_to_le32(tx_buffer->length) &
1784                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1785         }
1786
1787         for (f = 0; f < nr_frags; f++) {
1788                 const struct skb_frag_struct *frag;
1789                 u16 i;
1790                 u16 seg_num;
1791
1792                 frag = &skb_shinfo(skb)->frags[f];
1793                 buf_len = skb_frag_size(frag);
1794
1795                 seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1796                 for (i = 0; i < seg_num; i++) {
1797                         use_tpd = atl1e_get_tpd(adapter);
1798                         memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1799
1800                         tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1801                         BUG_ON(tx_buffer->skb);
1802
1803                         tx_buffer->skb = NULL;
1804                         tx_buffer->length =
1805                                 (buf_len > MAX_TX_BUF_LEN) ?
1806                                 MAX_TX_BUF_LEN : buf_len;
1807                         buf_len -= tx_buffer->length;
1808
1809                         tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1810                                                           frag,
1811                                                           (i * MAX_TX_BUF_LEN),
1812                                                           tx_buffer->length,
1813                                                           DMA_TO_DEVICE);
1814
1815                         if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1816                                 /* We need to unwind the mappings we've done */
1817                                 ring_end = adapter->tx_ring.next_to_use;
1818                                 adapter->tx_ring.next_to_use = ring_start;
1819                                 while (adapter->tx_ring.next_to_use != ring_end) {
1820                                         tpd = atl1e_get_tpd(adapter);
1821                                         tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1822                                         dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1823                                                        tx_buffer->length, DMA_TO_DEVICE);
1824                                 }
1825
1826                                 /* Reset the ring next to use pointer */
1827                                 adapter->tx_ring.next_to_use = ring_start;
1828                                 return -ENOSPC;
1829                         }
1830
1831                         ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1832                         use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1833                         use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1834                                         ((cpu_to_le32(tx_buffer->length) &
1835                                         TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1836                 }
1837         }
1838
1839         if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1840                 /* note this one is a tcp header */
1841                 tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1842         /* The last tpd */
1843
1844         use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1845         /* The last buffer info contain the skb address,
1846            so it will be free after unmap */
1847         tx_buffer->skb = skb;
1848         return 0;
1849 }
1850
1851 static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1852                            struct atl1e_tpd_desc *tpd)
1853 {
1854         struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1855         /* Force memory writes to complete before letting h/w
1856          * know there are new descriptors to fetch.  (Only
1857          * applicable for weak-ordered memory model archs,
1858          * such as IA-64). */
1859         wmb();
1860         AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1861 }
1862
1863 static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1864                                           struct net_device *netdev)
1865 {
1866         struct atl1e_adapter *adapter = netdev_priv(netdev);
1867         u16 tpd_req = 1;
1868         struct atl1e_tpd_desc *tpd;
1869
1870         if (test_bit(__AT_DOWN, &adapter->flags)) {
1871                 dev_kfree_skb_any(skb);
1872                 return NETDEV_TX_OK;
1873         }
1874
1875         if (unlikely(skb->len <= 0)) {
1876                 dev_kfree_skb_any(skb);
1877                 return NETDEV_TX_OK;
1878         }
1879         tpd_req = atl1e_cal_tdp_req(skb);
1880
1881         if (atl1e_tpd_avail(adapter) < tpd_req) {
1882                 /* no enough descriptor, just stop queue */
1883                 netif_stop_queue(netdev);
1884                 return NETDEV_TX_BUSY;
1885         }
1886
1887         tpd = atl1e_get_tpd(adapter);
1888
1889         if (skb_vlan_tag_present(skb)) {
1890                 u16 vlan_tag = skb_vlan_tag_get(skb);
1891                 u16 atl1e_vlan_tag;
1892
1893                 tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1894                 AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1895                 tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1896                                 TPD_VLAN_SHIFT;
1897         }
1898
1899         if (skb->protocol == htons(ETH_P_8021Q))
1900                 tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1901
1902         if (skb_network_offset(skb) != ETH_HLEN)
1903                 tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1904
1905         /* do TSO and check sum */
1906         if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1907                 dev_kfree_skb_any(skb);
1908                 return NETDEV_TX_OK;
1909         }
1910
1911         if (atl1e_tx_map(adapter, skb, tpd)) {
1912                 dev_kfree_skb_any(skb);
1913                 goto out;
1914         }
1915
1916         atl1e_tx_queue(adapter, tpd_req, tpd);
1917 out:
1918         return NETDEV_TX_OK;
1919 }
1920
1921 static void atl1e_free_irq(struct atl1e_adapter *adapter)
1922 {
1923         struct net_device *netdev = adapter->netdev;
1924
1925         free_irq(adapter->pdev->irq, netdev);
1926 }
1927
1928 static int atl1e_request_irq(struct atl1e_adapter *adapter)
1929 {
1930         struct pci_dev    *pdev   = adapter->pdev;
1931         struct net_device *netdev = adapter->netdev;
1932         int err = 0;
1933
1934         err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1935                           netdev);
1936         if (err) {
1937                 netdev_dbg(adapter->netdev,
1938                            "Unable to allocate interrupt Error: %d\n", err);
1939                 return err;
1940         }
1941         netdev_dbg(netdev, "atl1e_request_irq OK\n");
1942         return err;
1943 }
1944
1945 int atl1e_up(struct atl1e_adapter *adapter)
1946 {
1947         struct net_device *netdev = adapter->netdev;
1948         int err = 0;
1949         u32 val;
1950
1951         /* hardware has been reset, we need to reload some things */
1952         err = atl1e_init_hw(&adapter->hw);
1953         if (err) {
1954                 err = -EIO;
1955                 return err;
1956         }
1957         atl1e_init_ring_ptrs(adapter);
1958         atl1e_set_multi(netdev);
1959         atl1e_restore_vlan(adapter);
1960
1961         if (atl1e_configure(adapter)) {
1962                 err = -EIO;
1963                 goto err_up;
1964         }
1965
1966         clear_bit(__AT_DOWN, &adapter->flags);
1967         napi_enable(&adapter->napi);
1968         atl1e_irq_enable(adapter);
1969         val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1970         AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1971                       val | MASTER_CTRL_MANUAL_INT);
1972
1973 err_up:
1974         return err;
1975 }
1976
1977 void atl1e_down(struct atl1e_adapter *adapter)
1978 {
1979         struct net_device *netdev = adapter->netdev;
1980
1981         /* signal that we're down so the interrupt handler does not
1982          * reschedule our watchdog timer */
1983         set_bit(__AT_DOWN, &adapter->flags);
1984
1985         netif_stop_queue(netdev);
1986
1987         /* reset MAC to disable all RX/TX */
1988         atl1e_reset_hw(&adapter->hw);
1989         msleep(1);
1990
1991         napi_disable(&adapter->napi);
1992         atl1e_del_timer(adapter);
1993         atl1e_irq_disable(adapter);
1994
1995         netif_carrier_off(netdev);
1996         adapter->link_speed = SPEED_0;
1997         adapter->link_duplex = -1;
1998         atl1e_clean_tx_ring(adapter);
1999         atl1e_clean_rx_ring(adapter);
2000 }
2001
2002 /**
2003  * atl1e_open - Called when a network interface is made active
2004  * @netdev: network interface device structure
2005  *
2006  * Returns 0 on success, negative value on failure
2007  *
2008  * The open entry point is called when a network interface is made
2009  * active by the system (IFF_UP).  At this point all resources needed
2010  * for transmit and receive operations are allocated, the interrupt
2011  * handler is registered with the OS, the watchdog timer is started,
2012  * and the stack is notified that the interface is ready.
2013  */
2014 static int atl1e_open(struct net_device *netdev)
2015 {
2016         struct atl1e_adapter *adapter = netdev_priv(netdev);
2017         int err;
2018
2019         /* disallow open during test */
2020         if (test_bit(__AT_TESTING, &adapter->flags))
2021                 return -EBUSY;
2022
2023         /* allocate rx/tx dma buffer & descriptors */
2024         atl1e_init_ring_resources(adapter);
2025         err = atl1e_setup_ring_resources(adapter);
2026         if (unlikely(err))
2027                 return err;
2028
2029         err = atl1e_request_irq(adapter);
2030         if (unlikely(err))
2031                 goto err_req_irq;
2032
2033         err = atl1e_up(adapter);
2034         if (unlikely(err))
2035                 goto err_up;
2036
2037         return 0;
2038
2039 err_up:
2040         atl1e_free_irq(adapter);
2041 err_req_irq:
2042         atl1e_free_ring_resources(adapter);
2043         atl1e_reset_hw(&adapter->hw);
2044
2045         return err;
2046 }
2047
2048 /**
2049  * atl1e_close - Disables a network interface
2050  * @netdev: network interface device structure
2051  *
2052  * Returns 0, this is not allowed to fail
2053  *
2054  * The close entry point is called when an interface is de-activated
2055  * by the OS.  The hardware is still under the drivers control, but
2056  * needs to be disabled.  A global MAC reset is issued to stop the
2057  * hardware, and all transmit and receive resources are freed.
2058  */
2059 static int atl1e_close(struct net_device *netdev)
2060 {
2061         struct atl1e_adapter *adapter = netdev_priv(netdev);
2062
2063         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2064         atl1e_down(adapter);
2065         atl1e_free_irq(adapter);
2066         atl1e_free_ring_resources(adapter);
2067
2068         return 0;
2069 }
2070
2071 static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2072 {
2073         struct net_device *netdev = pci_get_drvdata(pdev);
2074         struct atl1e_adapter *adapter = netdev_priv(netdev);
2075         struct atl1e_hw *hw = &adapter->hw;
2076         u32 ctrl = 0;
2077         u32 mac_ctrl_data = 0;
2078         u32 wol_ctrl_data = 0;
2079         u16 mii_advertise_data = 0;
2080         u16 mii_bmsr_data = 0;
2081         u16 mii_intr_status_data = 0;
2082         u32 wufc = adapter->wol;
2083         u32 i;
2084 #ifdef CONFIG_PM
2085         int retval = 0;
2086 #endif
2087
2088         if (netif_running(netdev)) {
2089                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2090                 atl1e_down(adapter);
2091         }
2092         netif_device_detach(netdev);
2093
2094 #ifdef CONFIG_PM
2095         retval = pci_save_state(pdev);
2096         if (retval)
2097                 return retval;
2098 #endif
2099
2100         if (wufc) {
2101                 /* get link status */
2102                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2103                 atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2104
2105                 mii_advertise_data = ADVERTISE_10HALF;
2106
2107                 if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2108                     (atl1e_write_phy_reg(hw,
2109                            MII_ADVERTISE, mii_advertise_data) != 0) ||
2110                     (atl1e_phy_commit(hw)) != 0) {
2111                         netdev_dbg(adapter->netdev, "set phy register failed\n");
2112                         goto wol_dis;
2113                 }
2114
2115                 hw->phy_configured = false; /* re-init PHY when resume */
2116
2117                 /* turn on magic packet wol */
2118                 if (wufc & AT_WUFC_MAG)
2119                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2120
2121                 if (wufc & AT_WUFC_LNKC) {
2122                 /* if orignal link status is link, just wait for retrive link */
2123                         if (mii_bmsr_data & BMSR_LSTATUS) {
2124                                 for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2125                                         msleep(100);
2126                                         atl1e_read_phy_reg(hw, MII_BMSR,
2127                                                         &mii_bmsr_data);
2128                                         if (mii_bmsr_data & BMSR_LSTATUS)
2129                                                 break;
2130                                 }
2131
2132                                 if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2133                                         netdev_dbg(adapter->netdev,
2134                                                    "Link may change when suspend\n");
2135                         }
2136                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2137                         /* only link up can wake up */
2138                         if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2139                                 netdev_dbg(adapter->netdev,
2140                                            "read write phy register failed\n");
2141                                 goto wol_dis;
2142                         }
2143                 }
2144                 /* clear phy interrupt */
2145                 atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2146                 /* Config MAC Ctrl register */
2147                 mac_ctrl_data = MAC_CTRL_RX_EN;
2148                 /* set to 10/100M halt duplex */
2149                 mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2150                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2151                                  MAC_CTRL_PRMLEN_MASK) <<
2152                                  MAC_CTRL_PRMLEN_SHIFT);
2153
2154                 __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2155
2156                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2157                 if (wufc & AT_WUFC_MAG)
2158                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2159
2160                 netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2161                            mac_ctrl_data);
2162
2163                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2164                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2165                 /* pcie patch */
2166                 ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2167                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2168                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2169                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2170                 goto suspend_exit;
2171         }
2172 wol_dis:
2173
2174         /* WOL disabled */
2175         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2176
2177         /* pcie patch */
2178         ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2179         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2180         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2181
2182         atl1e_force_ps(hw);
2183         hw->phy_configured = false; /* re-init PHY when resume */
2184
2185         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2186
2187 suspend_exit:
2188
2189         if (netif_running(netdev))
2190                 atl1e_free_irq(adapter);
2191
2192         pci_disable_device(pdev);
2193
2194         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2195
2196         return 0;
2197 }
2198
2199 #ifdef CONFIG_PM
2200 static int atl1e_resume(struct pci_dev *pdev)
2201 {
2202         struct net_device *netdev = pci_get_drvdata(pdev);
2203         struct atl1e_adapter *adapter = netdev_priv(netdev);
2204         u32 err;
2205
2206         pci_set_power_state(pdev, PCI_D0);
2207         pci_restore_state(pdev);
2208
2209         err = pci_enable_device(pdev);
2210         if (err) {
2211                 netdev_err(adapter->netdev,
2212                            "Cannot enable PCI device from suspend\n");
2213                 return err;
2214         }
2215
2216         pci_set_master(pdev);
2217
2218         AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2219
2220         pci_enable_wake(pdev, PCI_D3hot, 0);
2221         pci_enable_wake(pdev, PCI_D3cold, 0);
2222
2223         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2224
2225         if (netif_running(netdev)) {
2226                 err = atl1e_request_irq(adapter);
2227                 if (err)
2228                         return err;
2229         }
2230
2231         atl1e_reset_hw(&adapter->hw);
2232
2233         if (netif_running(netdev))
2234                 atl1e_up(adapter);
2235
2236         netif_device_attach(netdev);
2237
2238         return 0;
2239 }
2240 #endif
2241
2242 static void atl1e_shutdown(struct pci_dev *pdev)
2243 {
2244         atl1e_suspend(pdev, PMSG_SUSPEND);
2245 }
2246
2247 static const struct net_device_ops atl1e_netdev_ops = {
2248         .ndo_open               = atl1e_open,
2249         .ndo_stop               = atl1e_close,
2250         .ndo_start_xmit         = atl1e_xmit_frame,
2251         .ndo_get_stats          = atl1e_get_stats,
2252         .ndo_set_rx_mode        = atl1e_set_multi,
2253         .ndo_validate_addr      = eth_validate_addr,
2254         .ndo_set_mac_address    = atl1e_set_mac_addr,
2255         .ndo_fix_features       = atl1e_fix_features,
2256         .ndo_set_features       = atl1e_set_features,
2257         .ndo_change_mtu         = atl1e_change_mtu,
2258         .ndo_do_ioctl           = atl1e_ioctl,
2259         .ndo_tx_timeout         = atl1e_tx_timeout,
2260 #ifdef CONFIG_NET_POLL_CONTROLLER
2261         .ndo_poll_controller    = atl1e_netpoll,
2262 #endif
2263
2264 };
2265
2266 static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2267 {
2268         SET_NETDEV_DEV(netdev, &pdev->dev);
2269         pci_set_drvdata(pdev, netdev);
2270
2271         netdev->netdev_ops = &atl1e_netdev_ops;
2272
2273         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2274         /* MTU range: 42 - 8170 */
2275         netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2276         netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
2277                           (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2278         atl1e_set_ethtool_ops(netdev);
2279
2280         netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2281                               NETIF_F_HW_VLAN_CTAG_RX;
2282         netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_TX;
2283         /* not enabled by default */
2284         netdev->hw_features |= NETIF_F_RXALL | NETIF_F_RXFCS;
2285         return 0;
2286 }
2287
2288 /**
2289  * atl1e_probe - Device Initialization Routine
2290  * @pdev: PCI device information struct
2291  * @ent: entry in atl1e_pci_tbl
2292  *
2293  * Returns 0 on success, negative on failure
2294  *
2295  * atl1e_probe initializes an adapter identified by a pci_dev structure.
2296  * The OS initialization, configuring of the adapter private structure,
2297  * and a hardware reset occur.
2298  */
2299 static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2300 {
2301         struct net_device *netdev;
2302         struct atl1e_adapter *adapter = NULL;
2303         static int cards_found;
2304
2305         int err = 0;
2306
2307         err = pci_enable_device(pdev);
2308         if (err) {
2309                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2310                 return err;
2311         }
2312
2313         /*
2314          * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2315          * shared register for the high 32 bits, so only a single, aligned,
2316          * 4 GB physical address range can be used at a time.
2317          *
2318          * Supporting 64-bit DMA on this hardware is more trouble than it's
2319          * worth.  It is far easier to limit to 32-bit DMA than update
2320          * various kernel subsystems to support the mechanics required by a
2321          * fixed-high-32-bit system.
2322          */
2323         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2324             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2325                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2326                 goto err_dma;
2327         }
2328
2329         err = pci_request_regions(pdev, atl1e_driver_name);
2330         if (err) {
2331                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2332                 goto err_pci_reg;
2333         }
2334
2335         pci_set_master(pdev);
2336
2337         netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2338         if (netdev == NULL) {
2339                 err = -ENOMEM;
2340                 goto err_alloc_etherdev;
2341         }
2342
2343         err = atl1e_init_netdev(netdev, pdev);
2344         if (err) {
2345                 netdev_err(netdev, "init netdevice failed\n");
2346                 goto err_init_netdev;
2347         }
2348         adapter = netdev_priv(netdev);
2349         adapter->bd_number = cards_found;
2350         adapter->netdev = netdev;
2351         adapter->pdev = pdev;
2352         adapter->hw.adapter = adapter;
2353         adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2354         if (!adapter->hw.hw_addr) {
2355                 err = -EIO;
2356                 netdev_err(netdev, "cannot map device registers\n");
2357                 goto err_ioremap;
2358         }
2359
2360         /* init mii data */
2361         adapter->mii.dev = netdev;
2362         adapter->mii.mdio_read  = atl1e_mdio_read;
2363         adapter->mii.mdio_write = atl1e_mdio_write;
2364         adapter->mii.phy_id_mask = 0x1f;
2365         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2366
2367         netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2368
2369         setup_timer(&adapter->phy_config_timer, atl1e_phy_config,
2370                     (unsigned long)adapter);
2371
2372         /* get user settings */
2373         atl1e_check_options(adapter);
2374         /*
2375          * Mark all PCI regions associated with PCI device
2376          * pdev as being reserved by owner atl1e_driver_name
2377          * Enables bus-mastering on the device and calls
2378          * pcibios_set_master to do the needed arch specific settings
2379          */
2380         atl1e_setup_pcicmd(pdev);
2381         /* setup the private structure */
2382         err = atl1e_sw_init(adapter);
2383         if (err) {
2384                 netdev_err(netdev, "net device private data init failed\n");
2385                 goto err_sw_init;
2386         }
2387
2388         /* Init GPHY as early as possible due to power saving issue  */
2389         atl1e_phy_init(&adapter->hw);
2390         /* reset the controller to
2391          * put the device in a known good starting state */
2392         err = atl1e_reset_hw(&adapter->hw);
2393         if (err) {
2394                 err = -EIO;
2395                 goto err_reset;
2396         }
2397
2398         if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2399                 err = -EIO;
2400                 netdev_err(netdev, "get mac address failed\n");
2401                 goto err_eeprom;
2402         }
2403
2404         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2405         netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2406
2407         INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2408         INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2409         netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2410         err = register_netdev(netdev);
2411         if (err) {
2412                 netdev_err(netdev, "register netdevice failed\n");
2413                 goto err_register;
2414         }
2415
2416         /* assume we have no link for now */
2417         netif_stop_queue(netdev);
2418         netif_carrier_off(netdev);
2419
2420         cards_found++;
2421
2422         return 0;
2423
2424 err_reset:
2425 err_register:
2426 err_sw_init:
2427 err_eeprom:
2428         pci_iounmap(pdev, adapter->hw.hw_addr);
2429 err_init_netdev:
2430 err_ioremap:
2431         free_netdev(netdev);
2432 err_alloc_etherdev:
2433         pci_release_regions(pdev);
2434 err_pci_reg:
2435 err_dma:
2436         pci_disable_device(pdev);
2437         return err;
2438 }
2439
2440 /**
2441  * atl1e_remove - Device Removal Routine
2442  * @pdev: PCI device information struct
2443  *
2444  * atl1e_remove is called by the PCI subsystem to alert the driver
2445  * that it should release a PCI device.  The could be caused by a
2446  * Hot-Plug event, or because the driver is going to be removed from
2447  * memory.
2448  */
2449 static void atl1e_remove(struct pci_dev *pdev)
2450 {
2451         struct net_device *netdev = pci_get_drvdata(pdev);
2452         struct atl1e_adapter *adapter = netdev_priv(netdev);
2453
2454         /*
2455          * flush_scheduled work may reschedule our watchdog task, so
2456          * explicitly disable watchdog tasks from being rescheduled
2457          */
2458         set_bit(__AT_DOWN, &adapter->flags);
2459
2460         atl1e_del_timer(adapter);
2461         atl1e_cancel_work(adapter);
2462
2463         unregister_netdev(netdev);
2464         atl1e_free_ring_resources(adapter);
2465         atl1e_force_ps(&adapter->hw);
2466         pci_iounmap(pdev, adapter->hw.hw_addr);
2467         pci_release_regions(pdev);
2468         free_netdev(netdev);
2469         pci_disable_device(pdev);
2470 }
2471
2472 /**
2473  * atl1e_io_error_detected - called when PCI error is detected
2474  * @pdev: Pointer to PCI device
2475  * @state: The current pci connection state
2476  *
2477  * This function is called after a PCI bus error affecting
2478  * this device has been detected.
2479  */
2480 static pci_ers_result_t
2481 atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2482 {
2483         struct net_device *netdev = pci_get_drvdata(pdev);
2484         struct atl1e_adapter *adapter = netdev_priv(netdev);
2485
2486         netif_device_detach(netdev);
2487
2488         if (state == pci_channel_io_perm_failure)
2489                 return PCI_ERS_RESULT_DISCONNECT;
2490
2491         if (netif_running(netdev))
2492                 atl1e_down(adapter);
2493
2494         pci_disable_device(pdev);
2495
2496         /* Request a slot slot reset. */
2497         return PCI_ERS_RESULT_NEED_RESET;
2498 }
2499
2500 /**
2501  * atl1e_io_slot_reset - called after the pci bus has been reset.
2502  * @pdev: Pointer to PCI device
2503  *
2504  * Restart the card from scratch, as if from a cold-boot. Implementation
2505  * resembles the first-half of the e1000_resume routine.
2506  */
2507 static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2508 {
2509         struct net_device *netdev = pci_get_drvdata(pdev);
2510         struct atl1e_adapter *adapter = netdev_priv(netdev);
2511
2512         if (pci_enable_device(pdev)) {
2513                 netdev_err(adapter->netdev,
2514                            "Cannot re-enable PCI device after reset\n");
2515                 return PCI_ERS_RESULT_DISCONNECT;
2516         }
2517         pci_set_master(pdev);
2518
2519         pci_enable_wake(pdev, PCI_D3hot, 0);
2520         pci_enable_wake(pdev, PCI_D3cold, 0);
2521
2522         atl1e_reset_hw(&adapter->hw);
2523
2524         return PCI_ERS_RESULT_RECOVERED;
2525 }
2526
2527 /**
2528  * atl1e_io_resume - called when traffic can start flowing again.
2529  * @pdev: Pointer to PCI device
2530  *
2531  * This callback is called when the error recovery driver tells us that
2532  * its OK to resume normal operation. Implementation resembles the
2533  * second-half of the atl1e_resume routine.
2534  */
2535 static void atl1e_io_resume(struct pci_dev *pdev)
2536 {
2537         struct net_device *netdev = pci_get_drvdata(pdev);
2538         struct atl1e_adapter *adapter = netdev_priv(netdev);
2539
2540         if (netif_running(netdev)) {
2541                 if (atl1e_up(adapter)) {
2542                         netdev_err(adapter->netdev,
2543                                    "can't bring device back up after reset\n");
2544                         return;
2545                 }
2546         }
2547
2548         netif_device_attach(netdev);
2549 }
2550
2551 static const struct pci_error_handlers atl1e_err_handler = {
2552         .error_detected = atl1e_io_error_detected,
2553         .slot_reset = atl1e_io_slot_reset,
2554         .resume = atl1e_io_resume,
2555 };
2556
2557 static struct pci_driver atl1e_driver = {
2558         .name     = atl1e_driver_name,
2559         .id_table = atl1e_pci_tbl,
2560         .probe    = atl1e_probe,
2561         .remove   = atl1e_remove,
2562         /* Power Management Hooks */
2563 #ifdef CONFIG_PM
2564         .suspend  = atl1e_suspend,
2565         .resume   = atl1e_resume,
2566 #endif
2567         .shutdown = atl1e_shutdown,
2568         .err_handler = &atl1e_err_handler
2569 };
2570
2571 module_pci_driver(atl1e_driver);