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