linux/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
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   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
  26char atl1e_driver_name[] = "ATL1E";
  27char 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 */
  38static 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};
  44MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  45
  46MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  47MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  48MODULE_LICENSE("GPL");
  49MODULE_VERSION(DRV_VERSION);
  50
  51static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  52
  53static const u16
  54atl1e_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
  62static 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
  70static const u16
  71atl1e_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
  79static const u16
  80atl1e_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
  88static 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 */
  96static 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 */
 109static 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 */
 121static 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 */
 133static void atl1e_phy_config(unsigned long data)
 134{
 135        struct atl1e_adapter *adapter = (struct atl1e_adapter *) data;
 136        struct atl1e_hw *hw = &adapter->hw;
 137        unsigned long flags;
 138
 139        spin_lock_irqsave(&adapter->mdio_lock, flags);
 140        atl1e_restart_autoneg(hw);
 141        spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 142}
 143
 144void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 145{
 146
 147        WARN_ON(in_interrupt());
 148        while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 149                msleep(1);
 150        atl1e_down(adapter);
 151        atl1e_up(adapter);
 152        clear_bit(__AT_RESETTING, &adapter->flags);
 153}
 154
 155static void atl1e_reset_task(struct work_struct *work)
 156{
 157        struct atl1e_adapter *adapter;
 158        adapter = container_of(work, struct atl1e_adapter, reset_task);
 159
 160        atl1e_reinit_locked(adapter);
 161}
 162
 163static int atl1e_check_link(struct atl1e_adapter *adapter)
 164{
 165        struct atl1e_hw *hw = &adapter->hw;
 166        struct net_device *netdev = adapter->netdev;
 167        int err = 0;
 168        u16 speed, duplex, phy_data;
 169
 170        /* MII_BMSR must read twice */
 171        atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 172        atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 173        if ((phy_data & BMSR_LSTATUS) == 0) {
 174                /* link down */
 175                if (netif_carrier_ok(netdev)) { /* old link state: Up */
 176                        u32 value;
 177                        /* disable rx */
 178                        value = AT_READ_REG(hw, REG_MAC_CTRL);
 179                        value &= ~MAC_CTRL_RX_EN;
 180                        AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 181                        adapter->link_speed = SPEED_0;
 182                        netif_carrier_off(netdev);
 183                        netif_stop_queue(netdev);
 184                }
 185        } else {
 186                /* Link Up */
 187                err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 188                if (unlikely(err))
 189                        return err;
 190
 191                /* link result is our setting */
 192                if (adapter->link_speed != speed ||
 193                    adapter->link_duplex != duplex) {
 194                        adapter->link_speed  = speed;
 195                        adapter->link_duplex = duplex;
 196                        atl1e_setup_mac_ctrl(adapter);
 197                        netdev_info(netdev,
 198                                    "NIC Link is Up <%d Mbps %s Duplex>\n",
 199                                    adapter->link_speed,
 200                                    adapter->link_duplex == FULL_DUPLEX ?
 201                                    "Full" : "Half");
 202                }
 203
 204                if (!netif_carrier_ok(netdev)) {
 205                        /* Link down -> Up */
 206                        netif_carrier_on(netdev);
 207                        netif_wake_queue(netdev);
 208                }
 209        }
 210        return 0;
 211}
 212
 213/**
 214 * atl1e_link_chg_task - deal with link change event Out of interrupt context
 215 * @netdev: network interface device structure
 216 */
 217static void atl1e_link_chg_task(struct work_struct *work)
 218{
 219        struct atl1e_adapter *adapter;
 220        unsigned long flags;
 221
 222        adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 223        spin_lock_irqsave(&adapter->mdio_lock, flags);
 224        atl1e_check_link(adapter);
 225        spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 226}
 227
 228static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 229{
 230        struct net_device *netdev = adapter->netdev;
 231        u16 phy_data = 0;
 232        u16 link_up = 0;
 233
 234        spin_lock(&adapter->mdio_lock);
 235        atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 236        atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 237        spin_unlock(&adapter->mdio_lock);
 238        link_up = phy_data & BMSR_LSTATUS;
 239        /* notify upper layer link down ASAP */
 240        if (!link_up) {
 241                if (netif_carrier_ok(netdev)) {
 242                        /* old link state: Up */
 243                        netdev_info(netdev, "NIC Link is Down\n");
 244                        adapter->link_speed = SPEED_0;
 245                        netif_stop_queue(netdev);
 246                }
 247        }
 248        schedule_work(&adapter->link_chg_task);
 249}
 250
 251static void atl1e_del_timer(struct atl1e_adapter *adapter)
 252{
 253        del_timer_sync(&adapter->phy_config_timer);
 254}
 255
 256static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 257{
 258        cancel_work_sync(&adapter->reset_task);
 259        cancel_work_sync(&adapter->link_chg_task);
 260}
 261
 262/**
 263 * atl1e_tx_timeout - Respond to a Tx Hang
 264 * @netdev: network interface device structure
 265 */
 266static void atl1e_tx_timeout(struct net_device *netdev)
 267{
 268        struct atl1e_adapter *adapter = netdev_priv(netdev);
 269
 270        /* Do the reset outside of interrupt context */
 271        schedule_work(&adapter->reset_task);
 272}
 273
 274/**
 275 * atl1e_set_multi - Multicast and Promiscuous mode set
 276 * @netdev: network interface device structure
 277 *
 278 * The set_multi entry point is called whenever the multicast address
 279 * list or the network interface flags are updated.  This routine is
 280 * responsible for configuring the hardware for proper multicast,
 281 * promiscuous mode, and all-multi behavior.
 282 */
 283static void atl1e_set_multi(struct net_device *netdev)
 284{
 285        struct atl1e_adapter *adapter = netdev_priv(netdev);
 286        struct atl1e_hw *hw = &adapter->hw;
 287        struct netdev_hw_addr *ha;
 288        u32 mac_ctrl_data = 0;
 289        u32 hash_value;
 290
 291        /* Check for Promiscuous and All Multicast modes */
 292        mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 293
 294        if (netdev->flags & IFF_PROMISC) {
 295                mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 296        } else if (netdev->flags & IFF_ALLMULTI) {
 297                mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 298                mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 299        } else {
 300                mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 301        }
 302
 303        AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 304
 305        /* clear the old settings from the multicast hash table */
 306        AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 307        AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 308
 309        /* comoute mc addresses' hash value ,and put it into hash table */
 310        netdev_for_each_mc_addr(ha, netdev) {
 311                hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 312                atl1e_hash_set(hw, hash_value);
 313        }
 314}
 315
 316static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 317{
 318        if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 319                /* enable VLAN tag insert/strip */
 320                *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 321        } else {
 322                /* disable VLAN tag insert/strip */
 323                *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 324        }
 325}
 326
 327static void atl1e_vlan_mode(struct net_device *netdev,
 328        netdev_features_t features)
 329{
 330        struct atl1e_adapter *adapter = netdev_priv(netdev);
 331        u32 mac_ctrl_data = 0;
 332
 333        netdev_dbg(adapter->netdev, "%s\n", __func__);
 334
 335        atl1e_irq_disable(adapter);
 336        mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 337        __atl1e_vlan_mode(features, &mac_ctrl_data);
 338        AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 339        atl1e_irq_enable(adapter);
 340}
 341
 342static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 343{
 344        netdev_dbg(adapter->netdev, "%s\n", __func__);
 345        atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
 346}
 347
 348/**
 349 * atl1e_set_mac - Change the Ethernet Address of the NIC
 350 * @netdev: network interface device structure
 351 * @p: pointer to an address structure
 352 *
 353 * Returns 0 on success, negative on failure
 354 */
 355static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 356{
 357        struct atl1e_adapter *adapter = netdev_priv(netdev);
 358        struct sockaddr *addr = p;
 359
 360        if (!is_valid_ether_addr(addr->sa_data))
 361                return -EADDRNOTAVAIL;
 362
 363        if (netif_running(netdev))
 364                return -EBUSY;
 365
 366        memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 367        memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 368
 369        atl1e_hw_set_mac_addr(&adapter->hw);
 370
 371        return 0;
 372}
 373
 374static netdev_features_t atl1e_fix_features(struct net_device *netdev,
 375        netdev_features_t features)
 376{
 377        /*
 378         * Since there is no support for separate rx/tx vlan accel
 379         * enable/disable make sure tx flag is always in same state as rx.
 380         */
 381        if (features & NETIF_F_HW_VLAN_CTAG_RX)
 382                features |= NETIF_F_HW_VLAN_CTAG_TX;
 383        else
 384                features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 385
 386        return features;
 387}
 388
 389static int atl1e_set_features(struct net_device *netdev,
 390        netdev_features_t features)
 391{
 392        netdev_features_t changed = netdev->features ^ features;
 393
 394        if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 395                atl1e_vlan_mode(netdev, features);
 396
 397        return 0;
 398}
 399
 400/**
 401 * atl1e_change_mtu - Change the Maximum Transfer Unit
 402 * @netdev: network interface device structure
 403 * @new_mtu: new value for maximum frame size
 404 *
 405 * Returns 0 on success, negative on failure
 406 */
 407static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 408{
 409        struct atl1e_adapter *adapter = netdev_priv(netdev);
 410        int old_mtu   = netdev->mtu;
 411        int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 412
 413        if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 414                        (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 415                netdev_warn(adapter->netdev, "invalid MTU setting\n");
 416                return -EINVAL;
 417        }
 418        /* set MTU */
 419        if (old_mtu != new_mtu && netif_running(netdev)) {
 420                while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 421                        msleep(1);
 422                netdev->mtu = new_mtu;
 423                adapter->hw.max_frame_size = new_mtu;
 424                adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 425                atl1e_down(adapter);
 426                atl1e_up(adapter);
 427                clear_bit(__AT_RESETTING, &adapter->flags);
 428        }
 429        return 0;
 430}
 431
 432/*
 433 *  caller should hold mdio_lock
 434 */
 435static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 436{
 437        struct atl1e_adapter *adapter = netdev_priv(netdev);
 438        u16 result;
 439
 440        atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 441        return result;
 442}
 443
 444static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 445                             int reg_num, int val)
 446{
 447        struct atl1e_adapter *adapter = netdev_priv(netdev);
 448
 449        atl1e_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 450}
 451
 452static int atl1e_mii_ioctl(struct net_device *netdev,
 453                           struct ifreq *ifr, int cmd)
 454{
 455        struct atl1e_adapter *adapter = netdev_priv(netdev);
 456        struct mii_ioctl_data *data = if_mii(ifr);
 457        unsigned long flags;
 458        int retval = 0;
 459
 460        if (!netif_running(netdev))
 461                return -EINVAL;
 462
 463        spin_lock_irqsave(&adapter->mdio_lock, flags);
 464        switch (cmd) {
 465        case SIOCGMIIPHY:
 466                data->phy_id = 0;
 467                break;
 468
 469        case SIOCGMIIREG:
 470                if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 471                                    &data->val_out)) {
 472                        retval = -EIO;
 473                        goto out;
 474                }
 475                break;
 476
 477        case SIOCSMIIREG:
 478                if (data->reg_num & ~(0x1F)) {
 479                        retval = -EFAULT;
 480                        goto out;
 481                }
 482
 483                netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 484                           data->reg_num, data->val_in);
 485                if (atl1e_write_phy_reg(&adapter->hw,
 486                                     data->reg_num, data->val_in)) {
 487                        retval = -EIO;
 488                        goto out;
 489                }
 490                break;
 491
 492        default:
 493                retval = -EOPNOTSUPP;
 494                break;
 495        }
 496out:
 497        spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 498        return retval;
 499
 500}
 501
 502static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 503{
 504        switch (cmd) {
 505        case SIOCGMIIPHY:
 506        case SIOCGMIIREG:
 507        case SIOCSMIIREG:
 508                return atl1e_mii_ioctl(netdev, ifr, cmd);
 509        default:
 510                return -EOPNOTSUPP;
 511        }
 512}
 513
 514static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 515{
 516        u16 cmd;
 517
 518        pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 519        cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 520        cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 521        pci_write_config_word(pdev, PCI_COMMAND, cmd);
 522
 523        /*
 524         * some motherboards BIOS(PXE/EFI) driver may set PME
 525         * while they transfer control to OS (Windows/Linux)
 526         * so we should clear this bit before NIC work normally
 527         */
 528        pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 529        msleep(1);
 530}
 531
 532/**
 533 * atl1e_alloc_queues - Allocate memory for all rings
 534 * @adapter: board private structure to initialize
 535 *
 536 */
 537static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
 538{
 539        return 0;
 540}
 541
 542/**
 543 * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 544 * @adapter: board private structure to initialize
 545 *
 546 * atl1e_sw_init initializes the Adapter private data structure.
 547 * Fields are initialized based on PCI device information and
 548 * OS network device settings (MTU size).
 549 */
 550static int atl1e_sw_init(struct atl1e_adapter *adapter)
 551{
 552        struct atl1e_hw *hw   = &adapter->hw;
 553        struct pci_dev  *pdev = adapter->pdev;
 554        u32 phy_status_data = 0;
 555
 556        adapter->wol = 0;
 557        adapter->link_speed = SPEED_0;   /* hardware init */
 558        adapter->link_duplex = FULL_DUPLEX;
 559        adapter->num_rx_queues = 1;
 560
 561        /* PCI config space info */
 562        hw->vendor_id = pdev->vendor;
 563        hw->device_id = pdev->device;
 564        hw->subsystem_vendor_id = pdev->subsystem_vendor;
 565        hw->subsystem_id = pdev->subsystem_device;
 566        hw->revision_id  = pdev->revision;
 567
 568        pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 569
 570        phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 571        /* nic type */
 572        if (hw->revision_id >= 0xF0) {
 573                hw->nic_type = athr_l2e_revB;
 574        } else {
 575                if (phy_status_data & PHY_STATUS_100M)
 576                        hw->nic_type = athr_l1e;
 577                else
 578                        hw->nic_type = athr_l2e_revA;
 579        }
 580
 581        phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 582
 583        if (phy_status_data & PHY_STATUS_EMI_CA)
 584                hw->emi_ca = true;
 585        else
 586                hw->emi_ca = false;
 587
 588        hw->phy_configured = false;
 589        hw->preamble_len = 7;
 590        hw->max_frame_size = adapter->netdev->mtu;
 591        hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 592                                VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 593
 594        hw->rrs_type = atl1e_rrs_disable;
 595        hw->indirect_tab = 0;
 596        hw->base_cpu = 0;
 597
 598        /* need confirm */
 599
 600        hw->ict = 50000;                 /* 100ms */
 601        hw->smb_timer = 200000;          /* 200ms  */
 602        hw->tpd_burst = 5;
 603        hw->rrd_thresh = 1;
 604        hw->tpd_thresh = adapter->tx_ring.count / 2;
 605        hw->rx_count_down = 4;  /* 2us resolution */
 606        hw->tx_count_down = hw->imt * 4 / 3;
 607        hw->dmar_block = atl1e_dma_req_1024;
 608        hw->dmaw_block = atl1e_dma_req_1024;
 609        hw->dmar_dly_cnt = 15;
 610        hw->dmaw_dly_cnt = 4;
 611
 612        if (atl1e_alloc_queues(adapter)) {
 613                netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 614                return -ENOMEM;
 615        }
 616
 617        atomic_set(&adapter->irq_sem, 1);
 618        spin_lock_init(&adapter->mdio_lock);
 619        spin_lock_init(&adapter->tx_lock);
 620
 621        set_bit(__AT_DOWN, &adapter->flags);
 622
 623        return 0;
 624}
 625
 626/**
 627 * atl1e_clean_tx_ring - Free Tx-skb
 628 * @adapter: board private structure
 629 */
 630static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 631{
 632        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 633        struct atl1e_tx_buffer *tx_buffer = NULL;
 634        struct pci_dev *pdev = adapter->pdev;
 635        u16 index, ring_count;
 636
 637        if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 638                return;
 639
 640        ring_count = tx_ring->count;
 641        /* first unmmap dma */
 642        for (index = 0; index < ring_count; index++) {
 643                tx_buffer = &tx_ring->tx_buffer[index];
 644                if (tx_buffer->dma) {
 645                        if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 646                                pci_unmap_single(pdev, tx_buffer->dma,
 647                                        tx_buffer->length, PCI_DMA_TODEVICE);
 648                        else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 649                                pci_unmap_page(pdev, tx_buffer->dma,
 650                                        tx_buffer->length, PCI_DMA_TODEVICE);
 651                        tx_buffer->dma = 0;
 652                }
 653        }
 654        /* second free skb */
 655        for (index = 0; index < ring_count; index++) {
 656                tx_buffer = &tx_ring->tx_buffer[index];
 657                if (tx_buffer->skb) {
 658                        dev_kfree_skb_any(tx_buffer->skb);
 659                        tx_buffer->skb = NULL;
 660                }
 661        }
 662        /* Zero out Tx-buffers */
 663        memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 664                                ring_count);
 665        memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 666                                ring_count);
 667}
 668
 669/**
 670 * atl1e_clean_rx_ring - Free rx-reservation skbs
 671 * @adapter: board private structure
 672 */
 673static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 674{
 675        struct atl1e_rx_ring *rx_ring =
 676                &adapter->rx_ring;
 677        struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 678        u16 i, j;
 679
 680
 681        if (adapter->ring_vir_addr == NULL)
 682                return;
 683        /* Zero out the descriptor ring */
 684        for (i = 0; i < adapter->num_rx_queues; i++) {
 685                for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 686                        if (rx_page_desc[i].rx_page[j].addr != NULL) {
 687                                memset(rx_page_desc[i].rx_page[j].addr, 0,
 688                                                rx_ring->real_page_size);
 689                        }
 690                }
 691        }
 692}
 693
 694static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 695{
 696        *ring_size = ((u32)(adapter->tx_ring.count *
 697                     sizeof(struct atl1e_tpd_desc) + 7
 698                        /* tx ring, qword align */
 699                     + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 700                        adapter->num_rx_queues + 31
 701                        /* rx ring,  32 bytes align */
 702                     + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 703                        sizeof(u32) + 3));
 704                        /* tx, rx cmd, dword align   */
 705}
 706
 707static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 708{
 709        struct atl1e_rx_ring *rx_ring = NULL;
 710
 711        rx_ring = &adapter->rx_ring;
 712
 713        rx_ring->real_page_size = adapter->rx_ring.page_size
 714                                 + adapter->hw.max_frame_size
 715                                 + ETH_HLEN + VLAN_HLEN
 716                                 + ETH_FCS_LEN;
 717        rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 718        atl1e_cal_ring_size(adapter, &adapter->ring_size);
 719
 720        adapter->ring_vir_addr = NULL;
 721        adapter->rx_ring.desc = NULL;
 722        rwlock_init(&adapter->tx_ring.tx_lock);
 723}
 724
 725/*
 726 * Read / Write Ptr Initialize:
 727 */
 728static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 729{
 730        struct atl1e_tx_ring *tx_ring = NULL;
 731        struct atl1e_rx_ring *rx_ring = NULL;
 732        struct atl1e_rx_page_desc *rx_page_desc = NULL;
 733        int i, j;
 734
 735        tx_ring = &adapter->tx_ring;
 736        rx_ring = &adapter->rx_ring;
 737        rx_page_desc = rx_ring->rx_page_desc;
 738
 739        tx_ring->next_to_use = 0;
 740        atomic_set(&tx_ring->next_to_clean, 0);
 741
 742        for (i = 0; i < adapter->num_rx_queues; i++) {
 743                rx_page_desc[i].rx_using  = 0;
 744                rx_page_desc[i].rx_nxseq = 0;
 745                for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 746                        *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 747                        rx_page_desc[i].rx_page[j].read_offset = 0;
 748                }
 749        }
 750}
 751
 752/**
 753 * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 754 * @adapter: board private structure
 755 *
 756 * Free all transmit software resources
 757 */
 758static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 759{
 760        struct pci_dev *pdev = adapter->pdev;
 761
 762        atl1e_clean_tx_ring(adapter);
 763        atl1e_clean_rx_ring(adapter);
 764
 765        if (adapter->ring_vir_addr) {
 766                pci_free_consistent(pdev, adapter->ring_size,
 767                                adapter->ring_vir_addr, adapter->ring_dma);
 768                adapter->ring_vir_addr = NULL;
 769        }
 770
 771        if (adapter->tx_ring.tx_buffer) {
 772                kfree(adapter->tx_ring.tx_buffer);
 773                adapter->tx_ring.tx_buffer = NULL;
 774        }
 775}
 776
 777/**
 778 * atl1e_setup_mem_resources - allocate Tx / RX descriptor resources
 779 * @adapter: board private structure
 780 *
 781 * Return 0 on success, negative on failure
 782 */
 783static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 784{
 785        struct pci_dev *pdev = adapter->pdev;
 786        struct atl1e_tx_ring *tx_ring;
 787        struct atl1e_rx_ring *rx_ring;
 788        struct atl1e_rx_page_desc  *rx_page_desc;
 789        int size, i, j;
 790        u32 offset = 0;
 791        int err = 0;
 792
 793        if (adapter->ring_vir_addr != NULL)
 794                return 0; /* alloced already */
 795
 796        tx_ring = &adapter->tx_ring;
 797        rx_ring = &adapter->rx_ring;
 798
 799        /* real ring DMA buffer */
 800
 801        size = adapter->ring_size;
 802        adapter->ring_vir_addr = pci_alloc_consistent(pdev,
 803                        adapter->ring_size, &adapter->ring_dma);
 804
 805        if (adapter->ring_vir_addr == NULL) {
 806                netdev_err(adapter->netdev,
 807                           "pci_alloc_consistent failed, size = D%d\n", size);
 808                return -ENOMEM;
 809        }
 810
 811        memset(adapter->ring_vir_addr, 0, adapter->ring_size);
 812
 813        rx_page_desc = rx_ring->rx_page_desc;
 814
 815        /* Init TPD Ring */
 816        tx_ring->dma = roundup(adapter->ring_dma, 8);
 817        offset = tx_ring->dma - adapter->ring_dma;
 818        tx_ring->desc = adapter->ring_vir_addr + offset;
 819        size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 820        tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 821        if (tx_ring->tx_buffer == NULL) {
 822                err = -ENOMEM;
 823                goto failed;
 824        }
 825
 826        /* Init RXF-Pages */
 827        offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 828        offset = roundup(offset, 32);
 829
 830        for (i = 0; i < adapter->num_rx_queues; i++) {
 831                for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 832                        rx_page_desc[i].rx_page[j].dma =
 833                                adapter->ring_dma + offset;
 834                        rx_page_desc[i].rx_page[j].addr =
 835                                adapter->ring_vir_addr + offset;
 836                        offset += rx_ring->real_page_size;
 837                }
 838        }
 839
 840        /* Init CMB dma address */
 841        tx_ring->cmb_dma = adapter->ring_dma + offset;
 842        tx_ring->cmb = adapter->ring_vir_addr + offset;
 843        offset += sizeof(u32);
 844
 845        for (i = 0; i < adapter->num_rx_queues; i++) {
 846                for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 847                        rx_page_desc[i].rx_page[j].write_offset_dma =
 848                                adapter->ring_dma + offset;
 849                        rx_page_desc[i].rx_page[j].write_offset_addr =
 850                                adapter->ring_vir_addr + offset;
 851                        offset += sizeof(u32);
 852                }
 853        }
 854
 855        if (unlikely(offset > adapter->ring_size)) {
 856                netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 857                           offset, adapter->ring_size);
 858                err = -1;
 859                goto failed;
 860        }
 861
 862        return 0;
 863failed:
 864        if (adapter->ring_vir_addr != NULL) {
 865                pci_free_consistent(pdev, adapter->ring_size,
 866                                adapter->ring_vir_addr, adapter->ring_dma);
 867                adapter->ring_vir_addr = NULL;
 868        }
 869        return err;
 870}
 871
 872static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
 873{
 874
 875        struct atl1e_hw *hw = &adapter->hw;
 876        struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
 877        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 878        struct atl1e_rx_page_desc *rx_page_desc = NULL;
 879        int i, j;
 880
 881        AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 882                        (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 883        AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 884                        (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 885        AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 886        AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 887                        (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 888
 889        rx_page_desc = rx_ring->rx_page_desc;
 890        /* RXF Page Physical address / Page Length */
 891        for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 892                AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 893                                 (u32)((adapter->ring_dma &
 894                                 AT_DMA_HI_ADDR_MASK) >> 32));
 895                for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 896                        u32 page_phy_addr;
 897                        u32 offset_phy_addr;
 898
 899                        page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 900                        offset_phy_addr =
 901                                   rx_page_desc[i].rx_page[j].write_offset_dma;
 902
 903                        AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 904                                        page_phy_addr & AT_DMA_LO_ADDR_MASK);
 905                        AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 906                                        offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 907                        AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 908                }
 909        }
 910        /* Page Length */
 911        AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 912        /* Load all of base address above */
 913        AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 914}
 915
 916static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 917{
 918        struct atl1e_hw *hw = &adapter->hw;
 919        u32 dev_ctrl_data = 0;
 920        u32 max_pay_load = 0;
 921        u32 jumbo_thresh = 0;
 922        u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 923
 924        /* configure TXQ param */
 925        if (hw->nic_type != athr_l2e_revB) {
 926                extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 927                if (hw->max_frame_size <= 1500) {
 928                        jumbo_thresh = hw->max_frame_size + extra_size;
 929                } else if (hw->max_frame_size < 6*1024) {
 930                        jumbo_thresh =
 931                                (hw->max_frame_size + extra_size) * 2 / 3;
 932                } else {
 933                        jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 934                }
 935                AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 936        }
 937
 938        dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 939
 940        max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 941                        DEVICE_CTRL_MAX_PAYLOAD_MASK;
 942
 943        hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 944
 945        max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 946                        DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 947        hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 948
 949        if (hw->nic_type != athr_l2e_revB)
 950                AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 951                              atl1e_pay_load_size[hw->dmar_block]);
 952        /* enable TXQ */
 953        AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 954                        (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 955                         << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 956                        | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 957}
 958
 959static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 960{
 961        struct atl1e_hw *hw = &adapter->hw;
 962        u32 rxf_len  = 0;
 963        u32 rxf_low  = 0;
 964        u32 rxf_high = 0;
 965        u32 rxf_thresh_data = 0;
 966        u32 rxq_ctrl_data = 0;
 967
 968        if (hw->nic_type != athr_l2e_revB) {
 969                AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 970                              (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 971                              RXQ_JMBOSZ_TH_SHIFT |
 972                              (1 & RXQ_JMBO_LKAH_MASK) <<
 973                              RXQ_JMBO_LKAH_SHIFT));
 974
 975                rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 976                rxf_high = rxf_len * 4 / 5;
 977                rxf_low  = rxf_len / 5;
 978                rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 979                                  << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 980                                  ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 981                                  << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 982
 983                AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 984        }
 985
 986        /* RRS */
 987        AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
 988        AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
 989
 990        if (hw->rrs_type & atl1e_rrs_ipv4)
 991                rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
 992
 993        if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
 994                rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
 995
 996        if (hw->rrs_type & atl1e_rrs_ipv6)
 997                rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
 998
 999        if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1000                rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1001
1002        if (hw->rrs_type != atl1e_rrs_disable)
1003                rxq_ctrl_data |=
1004                        (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1005
1006        rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1007                         RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1008
1009        AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1010}
1011
1012static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1013{
1014        struct atl1e_hw *hw = &adapter->hw;
1015        u32 dma_ctrl_data = 0;
1016
1017        dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1018        dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1019                << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1020        dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1021                << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1022        dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1023        dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1024                << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1025        dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1026                << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1027
1028        AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1029}
1030
1031static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1032{
1033        u32 value;
1034        struct atl1e_hw *hw = &adapter->hw;
1035        struct net_device *netdev = adapter->netdev;
1036
1037        /* Config MAC CTRL Register */
1038        value = MAC_CTRL_TX_EN |
1039                MAC_CTRL_RX_EN ;
1040
1041        if (FULL_DUPLEX == adapter->link_duplex)
1042                value |= MAC_CTRL_DUPLX;
1043
1044        value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1045                          MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1046                          MAC_CTRL_SPEED_SHIFT);
1047        value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1048
1049        value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1050        value |= (((u32)adapter->hw.preamble_len &
1051                  MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1052
1053        __atl1e_vlan_mode(netdev->features, &value);
1054
1055        value |= MAC_CTRL_BC_EN;
1056        if (netdev->flags & IFF_PROMISC)
1057                value |= MAC_CTRL_PROMIS_EN;
1058        if (netdev->flags & IFF_ALLMULTI)
1059                value |= MAC_CTRL_MC_ALL_EN;
1060
1061        AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1062}
1063
1064/**
1065 * atl1e_configure - Configure Transmit&Receive Unit after Reset
1066 * @adapter: board private structure
1067 *
1068 * Configure the Tx /Rx unit of the MAC after a reset.
1069 */
1070static int atl1e_configure(struct atl1e_adapter *adapter)
1071{
1072        struct atl1e_hw *hw = &adapter->hw;
1073
1074        u32 intr_status_data = 0;
1075
1076        /* clear interrupt status */
1077        AT_WRITE_REG(hw, REG_ISR, ~0);
1078
1079        /* 1. set MAC Address */
1080        atl1e_hw_set_mac_addr(hw);
1081
1082        /* 2. Init the Multicast HASH table done by set_muti */
1083
1084        /* 3. Clear any WOL status */
1085        AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1086
1087        /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1088         *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1089         *    High 32bits memory */
1090        atl1e_configure_des_ring(adapter);
1091
1092        /* 5. set Interrupt Moderator Timer */
1093        AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1094        AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1095        AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1096                        MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1097
1098        /* 6. rx/tx threshold to trig interrupt */
1099        AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1100        AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1101        AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1102        AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1103
1104        /* 7. set Interrupt Clear Timer */
1105        AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1106
1107        /* 8. set MTU */
1108        AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1109                        VLAN_HLEN + ETH_FCS_LEN);
1110
1111        /* 9. config TXQ early tx threshold */
1112        atl1e_configure_tx(adapter);
1113
1114        /* 10. config RXQ */
1115        atl1e_configure_rx(adapter);
1116
1117        /* 11. config  DMA Engine */
1118        atl1e_configure_dma(adapter);
1119
1120        /* 12. smb timer to trig interrupt */
1121        AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1122
1123        intr_status_data = AT_READ_REG(hw, REG_ISR);
1124        if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1125                netdev_err(adapter->netdev,
1126                           "atl1e_configure failed, PCIE phy link down\n");
1127                return -1;
1128        }
1129
1130        AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1131        return 0;
1132}
1133
1134/**
1135 * atl1e_get_stats - Get System Network Statistics
1136 * @netdev: network interface device structure
1137 *
1138 * Returns the address of the device statistics structure.
1139 * The statistics are actually updated from the timer callback.
1140 */
1141static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1142{
1143        struct atl1e_adapter *adapter = netdev_priv(netdev);
1144        struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1145        struct net_device_stats *net_stats = &netdev->stats;
1146
1147        net_stats->rx_packets = hw_stats->rx_ok;
1148        net_stats->tx_packets = hw_stats->tx_ok;
1149        net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1150        net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1151        net_stats->multicast  = hw_stats->rx_mcast;
1152        net_stats->collisions = hw_stats->tx_1_col +
1153                                hw_stats->tx_2_col * 2 +
1154                                hw_stats->tx_late_col + hw_stats->tx_abort_col;
1155
1156        net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1157                                hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1158                                hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1159        net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1160        net_stats->rx_length_errors = hw_stats->rx_len_err;
1161        net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1162        net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1163        net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1164
1165        net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1166
1167        net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1168                               hw_stats->tx_underrun + hw_stats->tx_trunc;
1169        net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1170        net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1171        net_stats->tx_window_errors  = hw_stats->tx_late_col;
1172
1173        return net_stats;
1174}
1175
1176static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1177{
1178        u16 hw_reg_addr = 0;
1179        unsigned long *stats_item = NULL;
1180
1181        /* update rx status */
1182        hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1183        stats_item  = &adapter->hw_stats.rx_ok;
1184        while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1185                *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1186                stats_item++;
1187                hw_reg_addr += 4;
1188        }
1189        /* update tx status */
1190        hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1191        stats_item  = &adapter->hw_stats.tx_ok;
1192        while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1193                *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1194                stats_item++;
1195                hw_reg_addr += 4;
1196        }
1197}
1198
1199static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1200{
1201        u16 phy_data;
1202
1203        spin_lock(&adapter->mdio_lock);
1204        atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1205        spin_unlock(&adapter->mdio_lock);
1206}
1207
1208static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1209{
1210        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1211        struct atl1e_tx_buffer *tx_buffer = NULL;
1212        u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1213        u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1214
1215        while (next_to_clean != hw_next_to_clean) {
1216                tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1217                if (tx_buffer->dma) {
1218                        if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1219                                pci_unmap_single(adapter->pdev, tx_buffer->dma,
1220                                        tx_buffer->length, PCI_DMA_TODEVICE);
1221                        else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1222                                pci_unmap_page(adapter->pdev, tx_buffer->dma,
1223                                        tx_buffer->length, PCI_DMA_TODEVICE);
1224                        tx_buffer->dma = 0;
1225                }
1226
1227                if (tx_buffer->skb) {
1228                        dev_kfree_skb_irq(tx_buffer->skb);
1229                        tx_buffer->skb = NULL;
1230                }
1231
1232                if (++next_to_clean == tx_ring->count)
1233                        next_to_clean = 0;
1234        }
1235
1236        atomic_set(&tx_ring->next_to_clean, next_to_clean);
1237
1238        if (netif_queue_stopped(adapter->netdev) &&
1239                        netif_carrier_ok(adapter->netdev)) {
1240                netif_wake_queue(adapter->netdev);
1241        }
1242
1243        return true;
1244}
1245
1246/**
1247 * atl1e_intr - Interrupt Handler
1248 * @irq: interrupt number
1249 * @data: pointer to a network interface device structure
1250 */
1251static irqreturn_t atl1e_intr(int irq, void *data)
1252{
1253        struct net_device *netdev  = data;
1254        struct atl1e_adapter *adapter = netdev_priv(netdev);
1255        struct atl1e_hw *hw = &adapter->hw;
1256        int max_ints = AT_MAX_INT_WORK;
1257        int handled = IRQ_NONE;
1258        u32 status;
1259
1260        do {
1261                status = AT_READ_REG(hw, REG_ISR);
1262                if ((status & IMR_NORMAL_MASK) == 0 ||
1263                                (status & ISR_DIS_INT) != 0) {
1264                        if (max_ints != AT_MAX_INT_WORK)
1265                                handled = IRQ_HANDLED;
1266                        break;
1267                }
1268                /* link event */
1269                if (status & ISR_GPHY)
1270                        atl1e_clear_phy_int(adapter);
1271                /* Ack ISR */
1272                AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1273
1274                handled = IRQ_HANDLED;
1275                /* check if PCIE PHY Link down */
1276                if (status & ISR_PHY_LINKDOWN) {
1277                        netdev_err(adapter->netdev,
1278                                   "pcie phy linkdown %x\n", status);
1279                        if (netif_running(adapter->netdev)) {
1280                                /* reset MAC */
1281                                atl1e_irq_reset(adapter);
1282                                schedule_work(&adapter->reset_task);
1283                                break;
1284                        }
1285                }
1286
1287                /* check if DMA read/write error */
1288                if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1289                        netdev_err(adapter->netdev,
1290                                   "PCIE DMA RW error (status = 0x%x)\n",
1291                                   status);
1292                        atl1e_irq_reset(adapter);
1293                        schedule_work(&adapter->reset_task);
1294                        break;
1295                }
1296
1297                if (status & ISR_SMB)
1298                        atl1e_update_hw_stats(adapter);
1299
1300                /* link event */
1301                if (status & (ISR_GPHY | ISR_MANUAL)) {
1302                        netdev->stats.tx_carrier_errors++;
1303                        atl1e_link_chg_event(adapter);
1304                        break;
1305                }
1306
1307                /* transmit event */
1308                if (status & ISR_TX_EVENT)
1309                        atl1e_clean_tx_irq(adapter);
1310
1311                if (status & ISR_RX_EVENT) {
1312                        /*
1313                         * disable rx interrupts, without
1314                         * the synchronize_irq bit
1315                         */
1316                        AT_WRITE_REG(hw, REG_IMR,
1317                                     IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1318                        AT_WRITE_FLUSH(hw);
1319                        if (likely(napi_schedule_prep(
1320                                   &adapter->napi)))
1321                                __napi_schedule(&adapter->napi);
1322                }
1323        } while (--max_ints > 0);
1324        /* re-enable Interrupt*/
1325        AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1326
1327        return handled;
1328}
1329
1330static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1331                  struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1332{
1333        u8 *packet = (u8 *)(prrs + 1);
1334        struct iphdr *iph;
1335        u16 head_len = ETH_HLEN;
1336        u16 pkt_flags;
1337        u16 err_flags;
1338
1339        skb_checksum_none_assert(skb);
1340        pkt_flags = prrs->pkt_flag;
1341        err_flags = prrs->err_flag;
1342        if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1343                ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1344                if (pkt_flags & RRS_IS_IPV4) {
1345                        if (pkt_flags & RRS_IS_802_3)
1346                                head_len += 8;
1347                        iph = (struct iphdr *) (packet + head_len);
1348                        if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1349                                goto hw_xsum;
1350                }
1351                if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1352                        skb->ip_summed = CHECKSUM_UNNECESSARY;
1353                        return;
1354                }
1355        }
1356
1357hw_xsum :
1358        return;
1359}
1360
1361static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1362                                               u8 que)
1363{
1364        struct atl1e_rx_page_desc *rx_page_desc =
1365                (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1366        u8 rx_using = rx_page_desc[que].rx_using;
1367
1368        return &(rx_page_desc[que].rx_page[rx_using]);
1369}
1370
1371static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1372                   int *work_done, int work_to_do)
1373{
1374        struct net_device *netdev  = adapter->netdev;
1375        struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1376        struct atl1e_rx_page_desc *rx_page_desc =
1377                (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1378        struct sk_buff *skb = NULL;
1379        struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1380        u32 packet_size, write_offset;
1381        struct atl1e_recv_ret_status *prrs;
1382
1383        write_offset = *(rx_page->write_offset_addr);
1384        if (likely(rx_page->read_offset < write_offset)) {
1385                do {
1386                        if (*work_done >= work_to_do)
1387                                break;
1388                        (*work_done)++;
1389                        /* get new packet's  rrs */
1390                        prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1391                                                 rx_page->read_offset);
1392                        /* check sequence number */
1393                        if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1394                                netdev_err(netdev,
1395                                           "rx sequence number error (rx=%d) (expect=%d)\n",
1396                                           prrs->seq_num,
1397                                           rx_page_desc[que].rx_nxseq);
1398                                rx_page_desc[que].rx_nxseq++;
1399                                /* just for debug use */
1400                                AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1401                                             (((u32)prrs->seq_num) << 16) |
1402                                             rx_page_desc[que].rx_nxseq);
1403                                goto fatal_err;
1404                        }
1405                        rx_page_desc[que].rx_nxseq++;
1406
1407                        /* error packet */
1408                        if (prrs->pkt_flag & RRS_IS_ERR_FRAME) {
1409                                if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1410                                        RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1411                                        RRS_ERR_TRUNC)) {
1412                                /* hardware error, discard this packet*/
1413                                        netdev_err(netdev,
1414                                                   "rx packet desc error %x\n",
1415                                                   *((u32 *)prrs + 1));
1416                                        goto skip_pkt;
1417                                }
1418                        }
1419
1420                        packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1421                                        RRS_PKT_SIZE_MASK) - 4; /* CRC */
1422                        skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1423                        if (skb == NULL)
1424                                goto skip_pkt;
1425
1426                        memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1427                        skb_put(skb, packet_size);
1428                        skb->protocol = eth_type_trans(skb, netdev);
1429                        atl1e_rx_checksum(adapter, skb, prrs);
1430
1431                        if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1432                                u16 vlan_tag = (prrs->vtag >> 4) |
1433                                               ((prrs->vtag & 7) << 13) |
1434                                               ((prrs->vtag & 8) << 9);
1435                                netdev_dbg(netdev,
1436                                           "RXD VLAN TAG<RRD>=0x%04x\n",
1437                                           prrs->vtag);
1438                                __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1439                        }
1440                        netif_receive_skb(skb);
1441
1442skip_pkt:
1443        /* skip current packet whether it's ok or not. */
1444                        rx_page->read_offset +=
1445                                (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1446                                RRS_PKT_SIZE_MASK) +
1447                                sizeof(struct atl1e_recv_ret_status) + 31) &
1448                                                0xFFFFFFE0);
1449
1450                        if (rx_page->read_offset >= rx_ring->page_size) {
1451                                /* mark this page clean */
1452                                u16 reg_addr;
1453                                u8  rx_using;
1454
1455                                rx_page->read_offset =
1456                                        *(rx_page->write_offset_addr) = 0;
1457                                rx_using = rx_page_desc[que].rx_using;
1458                                reg_addr =
1459                                        atl1e_rx_page_vld_regs[que][rx_using];
1460                                AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1461                                rx_page_desc[que].rx_using ^= 1;
1462                                rx_page = atl1e_get_rx_page(adapter, que);
1463                        }
1464                        write_offset = *(rx_page->write_offset_addr);
1465                } while (rx_page->read_offset < write_offset);
1466        }
1467
1468        return;
1469
1470fatal_err:
1471        if (!test_bit(__AT_DOWN, &adapter->flags))
1472                schedule_work(&adapter->reset_task);
1473}
1474
1475/**
1476 * atl1e_clean - NAPI Rx polling callback
1477 */
1478static int atl1e_clean(struct napi_struct *napi, int budget)
1479{
1480        struct atl1e_adapter *adapter =
1481                        container_of(napi, struct atl1e_adapter, napi);
1482        u32 imr_data;
1483        int work_done = 0;
1484
1485        /* Keep link state information with original netdev */
1486        if (!netif_carrier_ok(adapter->netdev))
1487                goto quit_polling;
1488
1489        atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1490
1491        /* If no Tx and not enough Rx work done, exit the polling mode */
1492        if (work_done < budget) {
1493quit_polling:
1494                napi_complete(napi);
1495                imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1496                AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1497                /* test debug */
1498                if (test_bit(__AT_DOWN, &adapter->flags)) {
1499                        atomic_dec(&adapter->irq_sem);
1500                        netdev_err(adapter->netdev,
1501                                   "atl1e_clean is called when AT_DOWN\n");
1502                }
1503                /* reenable RX intr */
1504                /*atl1e_irq_enable(adapter); */
1505
1506        }
1507        return work_done;
1508}
1509
1510#ifdef CONFIG_NET_POLL_CONTROLLER
1511
1512/*
1513 * Polling 'interrupt' - used by things like netconsole to send skbs
1514 * without having to re-enable interrupts. It's not called while
1515 * the interrupt routine is executing.
1516 */
1517static void atl1e_netpoll(struct net_device *netdev)
1518{
1519        struct atl1e_adapter *adapter = netdev_priv(netdev);
1520
1521        disable_irq(adapter->pdev->irq);
1522        atl1e_intr(adapter->pdev->irq, netdev);
1523        enable_irq(adapter->pdev->irq);
1524}
1525#endif
1526
1527static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1528{
1529        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1530        u16 next_to_use = 0;
1531        u16 next_to_clean = 0;
1532
1533        next_to_clean = atomic_read(&tx_ring->next_to_clean);
1534        next_to_use   = tx_ring->next_to_use;
1535
1536        return (u16)(next_to_clean > next_to_use) ?
1537                (next_to_clean - next_to_use - 1) :
1538                (tx_ring->count + next_to_clean - next_to_use - 1);
1539}
1540
1541/*
1542 * get next usable tpd
1543 * Note: should call atl1e_tdp_avail to make sure
1544 * there is enough tpd to use
1545 */
1546static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1547{
1548        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1549        u16 next_to_use = 0;
1550
1551        next_to_use = tx_ring->next_to_use;
1552        if (++tx_ring->next_to_use == tx_ring->count)
1553                tx_ring->next_to_use = 0;
1554
1555        memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1556        return &tx_ring->desc[next_to_use];
1557}
1558
1559static struct atl1e_tx_buffer *
1560atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1561{
1562        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1563
1564        return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1565}
1566
1567/* Calculate the transmit packet descript needed*/
1568static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1569{
1570        int i = 0;
1571        u16 tpd_req = 1;
1572        u16 fg_size = 0;
1573        u16 proto_hdr_len = 0;
1574
1575        for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1576                fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1577                tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1578        }
1579
1580        if (skb_is_gso(skb)) {
1581                if (skb->protocol == htons(ETH_P_IP) ||
1582                   (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1583                        proto_hdr_len = skb_transport_offset(skb) +
1584                                        tcp_hdrlen(skb);
1585                        if (proto_hdr_len < skb_headlen(skb)) {
1586                                tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1587                                           MAX_TX_BUF_LEN - 1) >>
1588                                           MAX_TX_BUF_SHIFT);
1589                        }
1590                }
1591
1592        }
1593        return tpd_req;
1594}
1595
1596static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1597                       struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1598{
1599        u8 hdr_len;
1600        u32 real_len;
1601        unsigned short offload_type;
1602        int err;
1603
1604        if (skb_is_gso(skb)) {
1605                if (skb_header_cloned(skb)) {
1606                        err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1607                        if (unlikely(err))
1608                                return -1;
1609                }
1610                offload_type = skb_shinfo(skb)->gso_type;
1611
1612                if (offload_type & SKB_GSO_TCPV4) {
1613                        real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1614                                        + ntohs(ip_hdr(skb)->tot_len));
1615
1616                        if (real_len < skb->len)
1617                                pskb_trim(skb, real_len);
1618
1619                        hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1620                        if (unlikely(skb->len == hdr_len)) {
1621                                /* only xsum need */
1622                                netdev_warn(adapter->netdev,
1623                                            "IPV4 tso with zero data??\n");
1624                                goto check_sum;
1625                        } else {
1626                                ip_hdr(skb)->check = 0;
1627                                ip_hdr(skb)->tot_len = 0;
1628                                tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1629                                                        ip_hdr(skb)->saddr,
1630                                                        ip_hdr(skb)->daddr,
1631                                                        0, IPPROTO_TCP, 0);
1632                                tpd->word3 |= (ip_hdr(skb)->ihl &
1633                                        TDP_V4_IPHL_MASK) <<
1634                                        TPD_V4_IPHL_SHIFT;
1635                                tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1636                                        TPD_TCPHDRLEN_MASK) <<
1637                                        TPD_TCPHDRLEN_SHIFT;
1638                                tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1639                                        TPD_MSS_MASK) << TPD_MSS_SHIFT;
1640                                tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1641                        }
1642                        return 0;
1643                }
1644        }
1645
1646check_sum:
1647        if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1648                u8 css, cso;
1649
1650                cso = skb_checksum_start_offset(skb);
1651                if (unlikely(cso & 0x1)) {
1652                        netdev_err(adapter->netdev,
1653                                   "payload offset should not ant event number\n");
1654                        return -1;
1655                } else {
1656                        css = cso + skb->csum_offset;
1657                        tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1658                                        TPD_PLOADOFFSET_SHIFT;
1659                        tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1660                                        TPD_CCSUMOFFSET_SHIFT;
1661                        tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1662                }
1663        }
1664
1665        return 0;
1666}
1667
1668static int atl1e_tx_map(struct atl1e_adapter *adapter,
1669                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1670{
1671        struct atl1e_tpd_desc *use_tpd = NULL;
1672        struct atl1e_tx_buffer *tx_buffer = NULL;
1673        u16 buf_len = skb_headlen(skb);
1674        u16 map_len = 0;
1675        u16 mapped_len = 0;
1676        u16 hdr_len = 0;
1677        u16 nr_frags;
1678        u16 f;
1679        int segment;
1680        int ring_start = adapter->tx_ring.next_to_use;
1681        int ring_end;
1682
1683        nr_frags = skb_shinfo(skb)->nr_frags;
1684        segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1685        if (segment) {
1686                /* TSO */
1687                map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1688                use_tpd = tpd;
1689
1690                tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1691                tx_buffer->length = map_len;
1692                tx_buffer->dma = pci_map_single(adapter->pdev,
1693                                        skb->data, hdr_len, PCI_DMA_TODEVICE);
1694                if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1695                        return -ENOSPC;
1696
1697                ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1698                mapped_len += map_len;
1699                use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1700                use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1701                        ((cpu_to_le32(tx_buffer->length) &
1702                        TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1703        }
1704
1705        while (mapped_len < buf_len) {
1706                /* mapped_len == 0, means we should use the first tpd,
1707                   which is given by caller  */
1708                if (mapped_len == 0) {
1709                        use_tpd = tpd;
1710                } else {
1711                        use_tpd = atl1e_get_tpd(adapter);
1712                        memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1713                }
1714                tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1715                tx_buffer->skb = NULL;
1716
1717                tx_buffer->length = map_len =
1718                        ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1719                        MAX_TX_BUF_LEN : (buf_len - mapped_len);
1720                tx_buffer->dma =
1721                        pci_map_single(adapter->pdev, skb->data + mapped_len,
1722                                        map_len, PCI_DMA_TODEVICE);
1723
1724                if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1725                        /* We need to unwind the mappings we've done */
1726                        ring_end = adapter->tx_ring.next_to_use;
1727                        adapter->tx_ring.next_to_use = ring_start;
1728                        while (adapter->tx_ring.next_to_use != ring_end) {
1729                                tpd = atl1e_get_tpd(adapter);
1730                                tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1731                                pci_unmap_single(adapter->pdev, tx_buffer->dma,
1732                                                 tx_buffer->length, PCI_DMA_TODEVICE);
1733                        }
1734                        /* Reset the tx rings next pointer */
1735                        adapter->tx_ring.next_to_use = ring_start;
1736                        return -ENOSPC;
1737                }
1738
1739                ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1740                mapped_len  += map_len;
1741                use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1742                use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1743                        ((cpu_to_le32(tx_buffer->length) &
1744                        TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1745        }
1746
1747        for (f = 0; f < nr_frags; f++) {
1748                const struct skb_frag_struct *frag;
1749                u16 i;
1750                u16 seg_num;
1751
1752                frag = &skb_shinfo(skb)->frags[f];
1753                buf_len = skb_frag_size(frag);
1754
1755                seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1756                for (i = 0; i < seg_num; i++) {
1757                        use_tpd = atl1e_get_tpd(adapter);
1758                        memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1759
1760                        tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1761                        BUG_ON(tx_buffer->skb);
1762
1763                        tx_buffer->skb = NULL;
1764                        tx_buffer->length =
1765                                (buf_len > MAX_TX_BUF_LEN) ?
1766                                MAX_TX_BUF_LEN : buf_len;
1767                        buf_len -= tx_buffer->length;
1768
1769                        tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1770                                                          frag,
1771                                                          (i * MAX_TX_BUF_LEN),
1772                                                          tx_buffer->length,
1773                                                          DMA_TO_DEVICE);
1774
1775                        if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1776                                /* We need to unwind the mappings we've done */
1777                                ring_end = adapter->tx_ring.next_to_use;
1778                                adapter->tx_ring.next_to_use = ring_start;
1779                                while (adapter->tx_ring.next_to_use != ring_end) {
1780                                        tpd = atl1e_get_tpd(adapter);
1781                                        tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1782                                        dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1783                                                       tx_buffer->length, DMA_TO_DEVICE);
1784                                }
1785
1786                                /* Reset the ring next to use pointer */
1787                                adapter->tx_ring.next_to_use = ring_start;
1788                                return -ENOSPC;
1789                        }
1790
1791                        ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1792                        use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1793                        use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1794                                        ((cpu_to_le32(tx_buffer->length) &
1795                                        TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1796                }
1797        }
1798
1799        if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1800                /* note this one is a tcp header */
1801                tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1802        /* The last tpd */
1803
1804        use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1805        /* The last buffer info contain the skb address,
1806           so it will be free after unmap */
1807        tx_buffer->skb = skb;
1808        return 0;
1809}
1810
1811static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1812                           struct atl1e_tpd_desc *tpd)
1813{
1814        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1815        /* Force memory writes to complete before letting h/w
1816         * know there are new descriptors to fetch.  (Only
1817         * applicable for weak-ordered memory model archs,
1818         * such as IA-64). */
1819        wmb();
1820        AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1821}
1822
1823static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1824                                          struct net_device *netdev)
1825{
1826        struct atl1e_adapter *adapter = netdev_priv(netdev);
1827        unsigned long flags;
1828        u16 tpd_req = 1;
1829        struct atl1e_tpd_desc *tpd;
1830
1831        if (test_bit(__AT_DOWN, &adapter->flags)) {
1832                dev_kfree_skb_any(skb);
1833                return NETDEV_TX_OK;
1834        }
1835
1836        if (unlikely(skb->len <= 0)) {
1837                dev_kfree_skb_any(skb);
1838                return NETDEV_TX_OK;
1839        }
1840        tpd_req = atl1e_cal_tdp_req(skb);
1841        if (!spin_trylock_irqsave(&adapter->tx_lock, flags))
1842                return NETDEV_TX_LOCKED;
1843
1844        if (atl1e_tpd_avail(adapter) < tpd_req) {
1845                /* no enough descriptor, just stop queue */
1846                netif_stop_queue(netdev);
1847                spin_unlock_irqrestore(&adapter->tx_lock, flags);
1848                return NETDEV_TX_BUSY;
1849        }
1850
1851        tpd = atl1e_get_tpd(adapter);
1852
1853        if (skb_vlan_tag_present(skb)) {
1854                u16 vlan_tag = skb_vlan_tag_get(skb);
1855                u16 atl1e_vlan_tag;
1856
1857                tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1858                AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1859                tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1860                                TPD_VLAN_SHIFT;
1861        }
1862
1863        if (skb->protocol == htons(ETH_P_8021Q))
1864                tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1865
1866        if (skb_network_offset(skb) != ETH_HLEN)
1867                tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1868
1869        /* do TSO and check sum */
1870        if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1871                spin_unlock_irqrestore(&adapter->tx_lock, flags);
1872                dev_kfree_skb_any(skb);
1873                return NETDEV_TX_OK;
1874        }
1875
1876        if (atl1e_tx_map(adapter, skb, tpd)) {
1877                dev_kfree_skb_any(skb);
1878                goto out;
1879        }
1880
1881        atl1e_tx_queue(adapter, tpd_req, tpd);
1882
1883        netif_trans_update(netdev); /* NETIF_F_LLTX driver :( */
1884out:
1885        spin_unlock_irqrestore(&adapter->tx_lock, flags);
1886        return NETDEV_TX_OK;
1887}
1888
1889static void atl1e_free_irq(struct atl1e_adapter *adapter)
1890{
1891        struct net_device *netdev = adapter->netdev;
1892
1893        free_irq(adapter->pdev->irq, netdev);
1894}
1895
1896static int atl1e_request_irq(struct atl1e_adapter *adapter)
1897{
1898        struct pci_dev    *pdev   = adapter->pdev;
1899        struct net_device *netdev = adapter->netdev;
1900        int err = 0;
1901
1902        err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1903                          netdev);
1904        if (err) {
1905                netdev_dbg(adapter->netdev,
1906                           "Unable to allocate interrupt Error: %d\n", err);
1907                return err;
1908        }
1909        netdev_dbg(netdev, "atl1e_request_irq OK\n");
1910        return err;
1911}
1912
1913int atl1e_up(struct atl1e_adapter *adapter)
1914{
1915        struct net_device *netdev = adapter->netdev;
1916        int err = 0;
1917        u32 val;
1918
1919        /* hardware has been reset, we need to reload some things */
1920        err = atl1e_init_hw(&adapter->hw);
1921        if (err) {
1922                err = -EIO;
1923                return err;
1924        }
1925        atl1e_init_ring_ptrs(adapter);
1926        atl1e_set_multi(netdev);
1927        atl1e_restore_vlan(adapter);
1928
1929        if (atl1e_configure(adapter)) {
1930                err = -EIO;
1931                goto err_up;
1932        }
1933
1934        clear_bit(__AT_DOWN, &adapter->flags);
1935        napi_enable(&adapter->napi);
1936        atl1e_irq_enable(adapter);
1937        val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1938        AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1939                      val | MASTER_CTRL_MANUAL_INT);
1940
1941err_up:
1942        return err;
1943}
1944
1945void atl1e_down(struct atl1e_adapter *adapter)
1946{
1947        struct net_device *netdev = adapter->netdev;
1948
1949        /* signal that we're down so the interrupt handler does not
1950         * reschedule our watchdog timer */
1951        set_bit(__AT_DOWN, &adapter->flags);
1952
1953        netif_stop_queue(netdev);
1954
1955        /* reset MAC to disable all RX/TX */
1956        atl1e_reset_hw(&adapter->hw);
1957        msleep(1);
1958
1959        napi_disable(&adapter->napi);
1960        atl1e_del_timer(adapter);
1961        atl1e_irq_disable(adapter);
1962
1963        netif_carrier_off(netdev);
1964        adapter->link_speed = SPEED_0;
1965        adapter->link_duplex = -1;
1966        atl1e_clean_tx_ring(adapter);
1967        atl1e_clean_rx_ring(adapter);
1968}
1969
1970/**
1971 * atl1e_open - Called when a network interface is made active
1972 * @netdev: network interface device structure
1973 *
1974 * Returns 0 on success, negative value on failure
1975 *
1976 * The open entry point is called when a network interface is made
1977 * active by the system (IFF_UP).  At this point all resources needed
1978 * for transmit and receive operations are allocated, the interrupt
1979 * handler is registered with the OS, the watchdog timer is started,
1980 * and the stack is notified that the interface is ready.
1981 */
1982static int atl1e_open(struct net_device *netdev)
1983{
1984        struct atl1e_adapter *adapter = netdev_priv(netdev);
1985        int err;
1986
1987        /* disallow open during test */
1988        if (test_bit(__AT_TESTING, &adapter->flags))
1989                return -EBUSY;
1990
1991        /* allocate rx/tx dma buffer & descriptors */
1992        atl1e_init_ring_resources(adapter);
1993        err = atl1e_setup_ring_resources(adapter);
1994        if (unlikely(err))
1995                return err;
1996
1997        err = atl1e_request_irq(adapter);
1998        if (unlikely(err))
1999                goto err_req_irq;
2000
2001        err = atl1e_up(adapter);
2002        if (unlikely(err))
2003                goto err_up;
2004
2005        return 0;
2006
2007err_up:
2008        atl1e_free_irq(adapter);
2009err_req_irq:
2010        atl1e_free_ring_resources(adapter);
2011        atl1e_reset_hw(&adapter->hw);
2012
2013        return err;
2014}
2015
2016/**
2017 * atl1e_close - Disables a network interface
2018 * @netdev: network interface device structure
2019 *
2020 * Returns 0, this is not allowed to fail
2021 *
2022 * The close entry point is called when an interface is de-activated
2023 * by the OS.  The hardware is still under the drivers control, but
2024 * needs to be disabled.  A global MAC reset is issued to stop the
2025 * hardware, and all transmit and receive resources are freed.
2026 */
2027static int atl1e_close(struct net_device *netdev)
2028{
2029        struct atl1e_adapter *adapter = netdev_priv(netdev);
2030
2031        WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2032        atl1e_down(adapter);
2033        atl1e_free_irq(adapter);
2034        atl1e_free_ring_resources(adapter);
2035
2036        return 0;
2037}
2038
2039static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2040{
2041        struct net_device *netdev = pci_get_drvdata(pdev);
2042        struct atl1e_adapter *adapter = netdev_priv(netdev);
2043        struct atl1e_hw *hw = &adapter->hw;
2044        u32 ctrl = 0;
2045        u32 mac_ctrl_data = 0;
2046        u32 wol_ctrl_data = 0;
2047        u16 mii_advertise_data = 0;
2048        u16 mii_bmsr_data = 0;
2049        u16 mii_intr_status_data = 0;
2050        u32 wufc = adapter->wol;
2051        u32 i;
2052#ifdef CONFIG_PM
2053        int retval = 0;
2054#endif
2055
2056        if (netif_running(netdev)) {
2057                WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2058                atl1e_down(adapter);
2059        }
2060        netif_device_detach(netdev);
2061
2062#ifdef CONFIG_PM
2063        retval = pci_save_state(pdev);
2064        if (retval)
2065                return retval;
2066#endif
2067
2068        if (wufc) {
2069                /* get link status */
2070                atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2071                atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2072
2073                mii_advertise_data = ADVERTISE_10HALF;
2074
2075                if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2076                    (atl1e_write_phy_reg(hw,
2077                           MII_ADVERTISE, mii_advertise_data) != 0) ||
2078                    (atl1e_phy_commit(hw)) != 0) {
2079                        netdev_dbg(adapter->netdev, "set phy register failed\n");
2080                        goto wol_dis;
2081                }
2082
2083                hw->phy_configured = false; /* re-init PHY when resume */
2084
2085                /* turn on magic packet wol */
2086                if (wufc & AT_WUFC_MAG)
2087                        wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2088
2089                if (wufc & AT_WUFC_LNKC) {
2090                /* if orignal link status is link, just wait for retrive link */
2091                        if (mii_bmsr_data & BMSR_LSTATUS) {
2092                                for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2093                                        msleep(100);
2094                                        atl1e_read_phy_reg(hw, MII_BMSR,
2095                                                        &mii_bmsr_data);
2096                                        if (mii_bmsr_data & BMSR_LSTATUS)
2097                                                break;
2098                                }
2099
2100                                if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2101                                        netdev_dbg(adapter->netdev,
2102                                                   "Link may change when suspend\n");
2103                        }
2104                        wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2105                        /* only link up can wake up */
2106                        if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2107                                netdev_dbg(adapter->netdev,
2108                                           "read write phy register failed\n");
2109                                goto wol_dis;
2110                        }
2111                }
2112                /* clear phy interrupt */
2113                atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2114                /* Config MAC Ctrl register */
2115                mac_ctrl_data = MAC_CTRL_RX_EN;
2116                /* set to 10/100M halt duplex */
2117                mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2118                mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2119                                 MAC_CTRL_PRMLEN_MASK) <<
2120                                 MAC_CTRL_PRMLEN_SHIFT);
2121
2122                __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2123
2124                /* magic packet maybe Broadcast&multicast&Unicast frame */
2125                if (wufc & AT_WUFC_MAG)
2126                        mac_ctrl_data |= MAC_CTRL_BC_EN;
2127
2128                netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2129                           mac_ctrl_data);
2130
2131                AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2132                AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2133                /* pcie patch */
2134                ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2135                ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2136                AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2137                pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2138                goto suspend_exit;
2139        }
2140wol_dis:
2141
2142        /* WOL disabled */
2143        AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2144
2145        /* pcie patch */
2146        ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2147        ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2148        AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2149
2150        atl1e_force_ps(hw);
2151        hw->phy_configured = false; /* re-init PHY when resume */
2152
2153        pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2154
2155suspend_exit:
2156
2157        if (netif_running(netdev))
2158                atl1e_free_irq(adapter);
2159
2160        pci_disable_device(pdev);
2161
2162        pci_set_power_state(pdev, pci_choose_state(pdev, state));
2163
2164        return 0;
2165}
2166
2167#ifdef CONFIG_PM
2168static int atl1e_resume(struct pci_dev *pdev)
2169{
2170        struct net_device *netdev = pci_get_drvdata(pdev);
2171        struct atl1e_adapter *adapter = netdev_priv(netdev);
2172        u32 err;
2173
2174        pci_set_power_state(pdev, PCI_D0);
2175        pci_restore_state(pdev);
2176
2177        err = pci_enable_device(pdev);
2178        if (err) {
2179                netdev_err(adapter->netdev,
2180                           "Cannot enable PCI device from suspend\n");
2181                return err;
2182        }
2183
2184        pci_set_master(pdev);
2185
2186        AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2187
2188        pci_enable_wake(pdev, PCI_D3hot, 0);
2189        pci_enable_wake(pdev, PCI_D3cold, 0);
2190
2191        AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2192
2193        if (netif_running(netdev)) {
2194                err = atl1e_request_irq(adapter);
2195                if (err)
2196                        return err;
2197        }
2198
2199        atl1e_reset_hw(&adapter->hw);
2200
2201        if (netif_running(netdev))
2202                atl1e_up(adapter);
2203
2204        netif_device_attach(netdev);
2205
2206        return 0;
2207}
2208#endif
2209
2210static void atl1e_shutdown(struct pci_dev *pdev)
2211{
2212        atl1e_suspend(pdev, PMSG_SUSPEND);
2213}
2214
2215static const struct net_device_ops atl1e_netdev_ops = {
2216        .ndo_open               = atl1e_open,
2217        .ndo_stop               = atl1e_close,
2218        .ndo_start_xmit         = atl1e_xmit_frame,
2219        .ndo_get_stats          = atl1e_get_stats,
2220        .ndo_set_rx_mode        = atl1e_set_multi,
2221        .ndo_validate_addr      = eth_validate_addr,
2222        .ndo_set_mac_address    = atl1e_set_mac_addr,
2223        .ndo_fix_features       = atl1e_fix_features,
2224        .ndo_set_features       = atl1e_set_features,
2225        .ndo_change_mtu_rh74    = atl1e_change_mtu,
2226        .ndo_do_ioctl           = atl1e_ioctl,
2227        .ndo_tx_timeout         = atl1e_tx_timeout,
2228#ifdef CONFIG_NET_POLL_CONTROLLER
2229        .ndo_poll_controller    = atl1e_netpoll,
2230#endif
2231
2232};
2233
2234static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2235{
2236        SET_NETDEV_DEV(netdev, &pdev->dev);
2237        pci_set_drvdata(pdev, netdev);
2238
2239        netdev->netdev_ops = &atl1e_netdev_ops;
2240
2241        netdev->watchdog_timeo = AT_TX_WATCHDOG;
2242        atl1e_set_ethtool_ops(netdev);
2243
2244        netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2245                              NETIF_F_HW_VLAN_CTAG_RX;
2246        netdev->features = netdev->hw_features | NETIF_F_LLTX |
2247                           NETIF_F_HW_VLAN_CTAG_TX;
2248
2249        return 0;
2250}
2251
2252/**
2253 * atl1e_probe - Device Initialization Routine
2254 * @pdev: PCI device information struct
2255 * @ent: entry in atl1e_pci_tbl
2256 *
2257 * Returns 0 on success, negative on failure
2258 *
2259 * atl1e_probe initializes an adapter identified by a pci_dev structure.
2260 * The OS initialization, configuring of the adapter private structure,
2261 * and a hardware reset occur.
2262 */
2263static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2264{
2265        struct net_device *netdev;
2266        struct atl1e_adapter *adapter = NULL;
2267        static int cards_found;
2268
2269        int err = 0;
2270
2271        err = pci_enable_device(pdev);
2272        if (err) {
2273                dev_err(&pdev->dev, "cannot enable PCI device\n");
2274                return err;
2275        }
2276
2277        /*
2278         * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2279         * shared register for the high 32 bits, so only a single, aligned,
2280         * 4 GB physical address range can be used at a time.
2281         *
2282         * Supporting 64-bit DMA on this hardware is more trouble than it's
2283         * worth.  It is far easier to limit to 32-bit DMA than update
2284         * various kernel subsystems to support the mechanics required by a
2285         * fixed-high-32-bit system.
2286         */
2287        if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2288            (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2289                dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2290                goto err_dma;
2291        }
2292
2293        err = pci_request_regions(pdev, atl1e_driver_name);
2294        if (err) {
2295                dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2296                goto err_pci_reg;
2297        }
2298
2299        pci_set_master(pdev);
2300
2301        netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2302        if (netdev == NULL) {
2303                err = -ENOMEM;
2304                goto err_alloc_etherdev;
2305        }
2306
2307        err = atl1e_init_netdev(netdev, pdev);
2308        if (err) {
2309                netdev_err(netdev, "init netdevice failed\n");
2310                goto err_init_netdev;
2311        }
2312        adapter = netdev_priv(netdev);
2313        adapter->bd_number = cards_found;
2314        adapter->netdev = netdev;
2315        adapter->pdev = pdev;
2316        adapter->hw.adapter = adapter;
2317        adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2318        if (!adapter->hw.hw_addr) {
2319                err = -EIO;
2320                netdev_err(netdev, "cannot map device registers\n");
2321                goto err_ioremap;
2322        }
2323
2324        /* init mii data */
2325        adapter->mii.dev = netdev;
2326        adapter->mii.mdio_read  = atl1e_mdio_read;
2327        adapter->mii.mdio_write = atl1e_mdio_write;
2328        adapter->mii.phy_id_mask = 0x1f;
2329        adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2330
2331        netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2332
2333        init_timer(&adapter->phy_config_timer);
2334        adapter->phy_config_timer.function = atl1e_phy_config;
2335        adapter->phy_config_timer.data = (unsigned long) adapter;
2336
2337        /* get user settings */
2338        atl1e_check_options(adapter);
2339        /*
2340         * Mark all PCI regions associated with PCI device
2341         * pdev as being reserved by owner atl1e_driver_name
2342         * Enables bus-mastering on the device and calls
2343         * pcibios_set_master to do the needed arch specific settings
2344         */
2345        atl1e_setup_pcicmd(pdev);
2346        /* setup the private structure */
2347        err = atl1e_sw_init(adapter);
2348        if (err) {
2349                netdev_err(netdev, "net device private data init failed\n");
2350                goto err_sw_init;
2351        }
2352
2353        /* Init GPHY as early as possible due to power saving issue  */
2354        atl1e_phy_init(&adapter->hw);
2355        /* reset the controller to
2356         * put the device in a known good starting state */
2357        err = atl1e_reset_hw(&adapter->hw);
2358        if (err) {
2359                err = -EIO;
2360                goto err_reset;
2361        }
2362
2363        if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2364                err = -EIO;
2365                netdev_err(netdev, "get mac address failed\n");
2366                goto err_eeprom;
2367        }
2368
2369        memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2370        netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2371
2372        INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2373        INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2374        netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2375        err = register_netdev(netdev);
2376        if (err) {
2377                netdev_err(netdev, "register netdevice failed\n");
2378                goto err_register;
2379        }
2380
2381        /* assume we have no link for now */
2382        netif_stop_queue(netdev);
2383        netif_carrier_off(netdev);
2384
2385        cards_found++;
2386
2387        return 0;
2388
2389err_reset:
2390err_register:
2391err_sw_init:
2392err_eeprom:
2393        iounmap(adapter->hw.hw_addr);
2394err_init_netdev:
2395err_ioremap:
2396        free_netdev(netdev);
2397err_alloc_etherdev:
2398        pci_release_regions(pdev);
2399err_pci_reg:
2400err_dma:
2401        pci_disable_device(pdev);
2402        return err;
2403}
2404
2405/**
2406 * atl1e_remove - Device Removal Routine
2407 * @pdev: PCI device information struct
2408 *
2409 * atl1e_remove is called by the PCI subsystem to alert the driver
2410 * that it should release a PCI device.  The could be caused by a
2411 * Hot-Plug event, or because the driver is going to be removed from
2412 * memory.
2413 */
2414static void atl1e_remove(struct pci_dev *pdev)
2415{
2416        struct net_device *netdev = pci_get_drvdata(pdev);
2417        struct atl1e_adapter *adapter = netdev_priv(netdev);
2418
2419        /*
2420         * flush_scheduled work may reschedule our watchdog task, so
2421         * explicitly disable watchdog tasks from being rescheduled
2422         */
2423        set_bit(__AT_DOWN, &adapter->flags);
2424
2425        atl1e_del_timer(adapter);
2426        atl1e_cancel_work(adapter);
2427
2428        unregister_netdev(netdev);
2429        atl1e_free_ring_resources(adapter);
2430        atl1e_force_ps(&adapter->hw);
2431        iounmap(adapter->hw.hw_addr);
2432        pci_release_regions(pdev);
2433        free_netdev(netdev);
2434        pci_disable_device(pdev);
2435}
2436
2437/**
2438 * atl1e_io_error_detected - called when PCI error is detected
2439 * @pdev: Pointer to PCI device
2440 * @state: The current pci connection state
2441 *
2442 * This function is called after a PCI bus error affecting
2443 * this device has been detected.
2444 */
2445static pci_ers_result_t
2446atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2447{
2448        struct net_device *netdev = pci_get_drvdata(pdev);
2449        struct atl1e_adapter *adapter = netdev_priv(netdev);
2450
2451        netif_device_detach(netdev);
2452
2453        if (state == pci_channel_io_perm_failure)
2454                return PCI_ERS_RESULT_DISCONNECT;
2455
2456        if (netif_running(netdev))
2457                atl1e_down(adapter);
2458
2459        pci_disable_device(pdev);
2460
2461        /* Request a slot slot reset. */
2462        return PCI_ERS_RESULT_NEED_RESET;
2463}
2464
2465/**
2466 * atl1e_io_slot_reset - called after the pci bus has been reset.
2467 * @pdev: Pointer to PCI device
2468 *
2469 * Restart the card from scratch, as if from a cold-boot. Implementation
2470 * resembles the first-half of the e1000_resume routine.
2471 */
2472static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2473{
2474        struct net_device *netdev = pci_get_drvdata(pdev);
2475        struct atl1e_adapter *adapter = netdev_priv(netdev);
2476
2477        if (pci_enable_device(pdev)) {
2478                netdev_err(adapter->netdev,
2479                           "Cannot re-enable PCI device after reset\n");
2480                return PCI_ERS_RESULT_DISCONNECT;
2481        }
2482        pci_set_master(pdev);
2483
2484        pci_enable_wake(pdev, PCI_D3hot, 0);
2485        pci_enable_wake(pdev, PCI_D3cold, 0);
2486
2487        atl1e_reset_hw(&adapter->hw);
2488
2489        return PCI_ERS_RESULT_RECOVERED;
2490}
2491
2492/**
2493 * atl1e_io_resume - called when traffic can start flowing again.
2494 * @pdev: Pointer to PCI device
2495 *
2496 * This callback is called when the error recovery driver tells us that
2497 * its OK to resume normal operation. Implementation resembles the
2498 * second-half of the atl1e_resume routine.
2499 */
2500static void atl1e_io_resume(struct pci_dev *pdev)
2501{
2502        struct net_device *netdev = pci_get_drvdata(pdev);
2503        struct atl1e_adapter *adapter = netdev_priv(netdev);
2504
2505        if (netif_running(netdev)) {
2506                if (atl1e_up(adapter)) {
2507                        netdev_err(adapter->netdev,
2508                                   "can't bring device back up after reset\n");
2509                        return;
2510                }
2511        }
2512
2513        netif_device_attach(netdev);
2514}
2515
2516static const struct pci_error_handlers atl1e_err_handler = {
2517        .error_detected = atl1e_io_error_detected,
2518        .slot_reset = atl1e_io_slot_reset,
2519        .resume = atl1e_io_resume,
2520};
2521
2522static struct pci_driver atl1e_driver = {
2523        .name     = atl1e_driver_name,
2524        .id_table = atl1e_pci_tbl,
2525        .probe    = atl1e_probe,
2526        .remove   = atl1e_remove,
2527        /* Power Management Hooks */
2528#ifdef CONFIG_PM
2529        .suspend  = atl1e_suspend,
2530        .resume   = atl1e_resume,
2531#endif
2532        .shutdown = atl1e_shutdown,
2533        .err_handler = &atl1e_err_handler
2534};
2535
2536/**
2537 * atl1e_init_module - Driver Registration Routine
2538 *
2539 * atl1e_init_module is the first routine called when the driver is
2540 * loaded. All it does is register with the PCI subsystem.
2541 */
2542static int __init atl1e_init_module(void)
2543{
2544        return pci_register_driver(&atl1e_driver);
2545}
2546
2547/**
2548 * atl1e_exit_module - Driver Exit Cleanup Routine
2549 *
2550 * atl1e_exit_module is called just before the driver is removed
2551 * from memory.
2552 */
2553static void __exit atl1e_exit_module(void)
2554{
2555        pci_unregister_driver(&atl1e_driver);
2556}
2557
2558module_init(atl1e_init_module);
2559module_exit(atl1e_exit_module);
2560