linux/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   4 *
   5 * Derived from Intel e1000 driver
   6 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   7 */
   8
   9#include "atl1e.h"
  10
  11char atl1e_driver_name[] = "ATL1E";
  12#define PCI_DEVICE_ID_ATTANSIC_L1E      0x1026
  13/*
  14 * atl1e_pci_tbl - PCI Device ID Table
  15 *
  16 * Wildcard entries (PCI_ANY_ID) should come last
  17 * Last entry must be all 0s
  18 *
  19 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  20 *   Class, Class Mask, private data (not used) }
  21 */
  22static const struct pci_device_id atl1e_pci_tbl[] = {
  23        {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1E)},
  24        {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, 0x1066)},
  25        /* required last entry */
  26        { 0 }
  27};
  28MODULE_DEVICE_TABLE(pci, atl1e_pci_tbl);
  29
  30MODULE_AUTHOR("Atheros Corporation, <xiong.huang@atheros.com>, Jie Yang <jie.yang@atheros.com>");
  31MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  32MODULE_LICENSE("GPL");
  33
  34static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter);
  35
  36static const u16
  37atl1e_rx_page_vld_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  38{
  39        {REG_HOST_RXF0_PAGE0_VLD, REG_HOST_RXF0_PAGE1_VLD},
  40        {REG_HOST_RXF1_PAGE0_VLD, REG_HOST_RXF1_PAGE1_VLD},
  41        {REG_HOST_RXF2_PAGE0_VLD, REG_HOST_RXF2_PAGE1_VLD},
  42        {REG_HOST_RXF3_PAGE0_VLD, REG_HOST_RXF3_PAGE1_VLD}
  43};
  44
  45static const u16 atl1e_rx_page_hi_addr_regs[AT_MAX_RECEIVE_QUEUE] =
  46{
  47        REG_RXF0_BASE_ADDR_HI,
  48        REG_RXF1_BASE_ADDR_HI,
  49        REG_RXF2_BASE_ADDR_HI,
  50        REG_RXF3_BASE_ADDR_HI
  51};
  52
  53static const u16
  54atl1e_rx_page_lo_addr_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  55{
  56        {REG_HOST_RXF0_PAGE0_LO, REG_HOST_RXF0_PAGE1_LO},
  57        {REG_HOST_RXF1_PAGE0_LO, REG_HOST_RXF1_PAGE1_LO},
  58        {REG_HOST_RXF2_PAGE0_LO, REG_HOST_RXF2_PAGE1_LO},
  59        {REG_HOST_RXF3_PAGE0_LO, REG_HOST_RXF3_PAGE1_LO}
  60};
  61
  62static const u16
  63atl1e_rx_page_write_offset_regs[AT_MAX_RECEIVE_QUEUE][AT_PAGE_NUM_PER_QUEUE] =
  64{
  65        {REG_HOST_RXF0_MB0_LO,  REG_HOST_RXF0_MB1_LO},
  66        {REG_HOST_RXF1_MB0_LO,  REG_HOST_RXF1_MB1_LO},
  67        {REG_HOST_RXF2_MB0_LO,  REG_HOST_RXF2_MB1_LO},
  68        {REG_HOST_RXF3_MB0_LO,  REG_HOST_RXF3_MB1_LO}
  69};
  70
  71static const u16 atl1e_pay_load_size[] = {
  72        128, 256, 512, 1024, 2048, 4096,
  73};
  74
  75/**
  76 * atl1e_irq_enable - Enable default interrupt generation settings
  77 * @adapter: board private structure
  78 */
  79static inline void atl1e_irq_enable(struct atl1e_adapter *adapter)
  80{
  81        if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
  82                AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
  83                AT_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
  84                AT_WRITE_FLUSH(&adapter->hw);
  85        }
  86}
  87
  88/**
  89 * atl1e_irq_disable - Mask off interrupt generation on the NIC
  90 * @adapter: board private structure
  91 */
  92static inline void atl1e_irq_disable(struct atl1e_adapter *adapter)
  93{
  94        atomic_inc(&adapter->irq_sem);
  95        AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
  96        AT_WRITE_FLUSH(&adapter->hw);
  97        synchronize_irq(adapter->pdev->irq);
  98}
  99
 100/**
 101 * atl1e_irq_reset - reset interrupt confiure on the NIC
 102 * @adapter: board private structure
 103 */
 104static inline void atl1e_irq_reset(struct atl1e_adapter *adapter)
 105{
 106        atomic_set(&adapter->irq_sem, 0);
 107        AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
 108        AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 109        AT_WRITE_FLUSH(&adapter->hw);
 110}
 111
 112/**
 113 * atl1e_phy_config - Timer Call-back
 114 * @t: timer list containing pointer to netdev cast into an unsigned long
 115 */
 116static void atl1e_phy_config(struct timer_list *t)
 117{
 118        struct atl1e_adapter *adapter = from_timer(adapter, t,
 119                                                   phy_config_timer);
 120        struct atl1e_hw *hw = &adapter->hw;
 121        unsigned long flags;
 122
 123        spin_lock_irqsave(&adapter->mdio_lock, flags);
 124        atl1e_restart_autoneg(hw);
 125        spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 126}
 127
 128void atl1e_reinit_locked(struct atl1e_adapter *adapter)
 129{
 130        while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 131                msleep(1);
 132        atl1e_down(adapter);
 133        atl1e_up(adapter);
 134        clear_bit(__AT_RESETTING, &adapter->flags);
 135}
 136
 137static void atl1e_reset_task(struct work_struct *work)
 138{
 139        struct atl1e_adapter *adapter;
 140        adapter = container_of(work, struct atl1e_adapter, reset_task);
 141
 142        atl1e_reinit_locked(adapter);
 143}
 144
 145static int atl1e_check_link(struct atl1e_adapter *adapter)
 146{
 147        struct atl1e_hw *hw = &adapter->hw;
 148        struct net_device *netdev = adapter->netdev;
 149        int err = 0;
 150        u16 speed, duplex, phy_data;
 151
 152        /* MII_BMSR must read twice */
 153        atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 154        atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
 155        if ((phy_data & BMSR_LSTATUS) == 0) {
 156                /* link down */
 157                if (netif_carrier_ok(netdev)) { /* old link state: Up */
 158                        u32 value;
 159                        /* disable rx */
 160                        value = AT_READ_REG(hw, REG_MAC_CTRL);
 161                        value &= ~MAC_CTRL_RX_EN;
 162                        AT_WRITE_REG(hw, REG_MAC_CTRL, value);
 163                        adapter->link_speed = SPEED_0;
 164                        netif_carrier_off(netdev);
 165                        netif_stop_queue(netdev);
 166                }
 167        } else {
 168                /* Link Up */
 169                err = atl1e_get_speed_and_duplex(hw, &speed, &duplex);
 170                if (unlikely(err))
 171                        return err;
 172
 173                /* link result is our setting */
 174                if (adapter->link_speed != speed ||
 175                    adapter->link_duplex != duplex) {
 176                        adapter->link_speed  = speed;
 177                        adapter->link_duplex = duplex;
 178                        atl1e_setup_mac_ctrl(adapter);
 179                        netdev_info(netdev,
 180                                    "NIC Link is Up <%d Mbps %s Duplex>\n",
 181                                    adapter->link_speed,
 182                                    adapter->link_duplex == FULL_DUPLEX ?
 183                                    "Full" : "Half");
 184                }
 185
 186                if (!netif_carrier_ok(netdev)) {
 187                        /* Link down -> Up */
 188                        netif_carrier_on(netdev);
 189                        netif_wake_queue(netdev);
 190                }
 191        }
 192        return 0;
 193}
 194
 195/**
 196 * atl1e_link_chg_task - deal with link change event Out of interrupt context
 197 * @work: work struct with driver info
 198 */
 199static void atl1e_link_chg_task(struct work_struct *work)
 200{
 201        struct atl1e_adapter *adapter;
 202        unsigned long flags;
 203
 204        adapter = container_of(work, struct atl1e_adapter, link_chg_task);
 205        spin_lock_irqsave(&adapter->mdio_lock, flags);
 206        atl1e_check_link(adapter);
 207        spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 208}
 209
 210static void atl1e_link_chg_event(struct atl1e_adapter *adapter)
 211{
 212        struct net_device *netdev = adapter->netdev;
 213        u16 phy_data = 0;
 214        u16 link_up = 0;
 215
 216        spin_lock(&adapter->mdio_lock);
 217        atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 218        atl1e_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 219        spin_unlock(&adapter->mdio_lock);
 220        link_up = phy_data & BMSR_LSTATUS;
 221        /* notify upper layer link down ASAP */
 222        if (!link_up) {
 223                if (netif_carrier_ok(netdev)) {
 224                        /* old link state: Up */
 225                        netdev_info(netdev, "NIC Link is Down\n");
 226                        adapter->link_speed = SPEED_0;
 227                        netif_stop_queue(netdev);
 228                }
 229        }
 230        schedule_work(&adapter->link_chg_task);
 231}
 232
 233static void atl1e_del_timer(struct atl1e_adapter *adapter)
 234{
 235        del_timer_sync(&adapter->phy_config_timer);
 236}
 237
 238static void atl1e_cancel_work(struct atl1e_adapter *adapter)
 239{
 240        cancel_work_sync(&adapter->reset_task);
 241        cancel_work_sync(&adapter->link_chg_task);
 242}
 243
 244/**
 245 * atl1e_tx_timeout - Respond to a Tx Hang
 246 * @netdev: network interface device structure
 247 * @txqueue: the index of the hanging queue
 248 */
 249static void atl1e_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 250{
 251        struct atl1e_adapter *adapter = netdev_priv(netdev);
 252
 253        /* Do the reset outside of interrupt context */
 254        schedule_work(&adapter->reset_task);
 255}
 256
 257/**
 258 * atl1e_set_multi - Multicast and Promiscuous mode set
 259 * @netdev: network interface device structure
 260 *
 261 * The set_multi entry point is called whenever the multicast address
 262 * list or the network interface flags are updated.  This routine is
 263 * responsible for configuring the hardware for proper multicast,
 264 * promiscuous mode, and all-multi behavior.
 265 */
 266static void atl1e_set_multi(struct net_device *netdev)
 267{
 268        struct atl1e_adapter *adapter = netdev_priv(netdev);
 269        struct atl1e_hw *hw = &adapter->hw;
 270        struct netdev_hw_addr *ha;
 271        u32 mac_ctrl_data = 0;
 272        u32 hash_value;
 273
 274        /* Check for Promiscuous and All Multicast modes */
 275        mac_ctrl_data = AT_READ_REG(hw, REG_MAC_CTRL);
 276
 277        if (netdev->flags & IFF_PROMISC) {
 278                mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 279        } else if (netdev->flags & IFF_ALLMULTI) {
 280                mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 281                mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 282        } else {
 283                mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 284        }
 285
 286        AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 287
 288        /* clear the old settings from the multicast hash table */
 289        AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 290        AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 291
 292        /* comoute mc addresses' hash value ,and put it into hash table */
 293        netdev_for_each_mc_addr(ha, netdev) {
 294                hash_value = atl1e_hash_mc_addr(hw, ha->addr);
 295                atl1e_hash_set(hw, hash_value);
 296        }
 297}
 298
 299static void __atl1e_rx_mode(netdev_features_t features, u32 *mac_ctrl_data)
 300{
 301
 302        if (features & NETIF_F_RXALL) {
 303                /* enable RX of ALL frames */
 304                *mac_ctrl_data |= MAC_CTRL_DBG;
 305        } else {
 306                /* disable RX of ALL frames */
 307                *mac_ctrl_data &= ~MAC_CTRL_DBG;
 308        }
 309}
 310
 311static void atl1e_rx_mode(struct net_device *netdev,
 312        netdev_features_t features)
 313{
 314        struct atl1e_adapter *adapter = netdev_priv(netdev);
 315        u32 mac_ctrl_data = 0;
 316
 317        netdev_dbg(adapter->netdev, "%s\n", __func__);
 318
 319        atl1e_irq_disable(adapter);
 320        mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 321        __atl1e_rx_mode(features, &mac_ctrl_data);
 322        AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 323        atl1e_irq_enable(adapter);
 324}
 325
 326
 327static void __atl1e_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 328{
 329        if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 330                /* enable VLAN tag insert/strip */
 331                *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 332        } else {
 333                /* disable VLAN tag insert/strip */
 334                *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 335        }
 336}
 337
 338static void atl1e_vlan_mode(struct net_device *netdev,
 339        netdev_features_t features)
 340{
 341        struct atl1e_adapter *adapter = netdev_priv(netdev);
 342        u32 mac_ctrl_data = 0;
 343
 344        netdev_dbg(adapter->netdev, "%s\n", __func__);
 345
 346        atl1e_irq_disable(adapter);
 347        mac_ctrl_data = AT_READ_REG(&adapter->hw, REG_MAC_CTRL);
 348        __atl1e_vlan_mode(features, &mac_ctrl_data);
 349        AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 350        atl1e_irq_enable(adapter);
 351}
 352
 353static void atl1e_restore_vlan(struct atl1e_adapter *adapter)
 354{
 355        netdev_dbg(adapter->netdev, "%s\n", __func__);
 356        atl1e_vlan_mode(adapter->netdev, adapter->netdev->features);
 357}
 358
 359/**
 360 * atl1e_set_mac_addr - Change the Ethernet Address of the NIC
 361 * @netdev: network interface device structure
 362 * @p: pointer to an address structure
 363 *
 364 * Returns 0 on success, negative on failure
 365 */
 366static int atl1e_set_mac_addr(struct net_device *netdev, void *p)
 367{
 368        struct atl1e_adapter *adapter = netdev_priv(netdev);
 369        struct sockaddr *addr = p;
 370
 371        if (!is_valid_ether_addr(addr->sa_data))
 372                return -EADDRNOTAVAIL;
 373
 374        if (netif_running(netdev))
 375                return -EBUSY;
 376
 377        eth_hw_addr_set(netdev, addr->sa_data);
 378        memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 379
 380        atl1e_hw_set_mac_addr(&adapter->hw);
 381
 382        return 0;
 383}
 384
 385static netdev_features_t atl1e_fix_features(struct net_device *netdev,
 386        netdev_features_t features)
 387{
 388        /*
 389         * Since there is no support for separate rx/tx vlan accel
 390         * enable/disable make sure tx flag is always in same state as rx.
 391         */
 392        if (features & NETIF_F_HW_VLAN_CTAG_RX)
 393                features |= NETIF_F_HW_VLAN_CTAG_TX;
 394        else
 395                features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 396
 397        return features;
 398}
 399
 400static int atl1e_set_features(struct net_device *netdev,
 401        netdev_features_t features)
 402{
 403        netdev_features_t changed = netdev->features ^ features;
 404
 405        if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 406                atl1e_vlan_mode(netdev, features);
 407
 408        if (changed & NETIF_F_RXALL)
 409                atl1e_rx_mode(netdev, features);
 410
 411
 412        return 0;
 413}
 414
 415/**
 416 * atl1e_change_mtu - Change the Maximum Transfer Unit
 417 * @netdev: network interface device structure
 418 * @new_mtu: new value for maximum frame size
 419 *
 420 * Returns 0 on success, negative on failure
 421 */
 422static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
 423{
 424        struct atl1e_adapter *adapter = netdev_priv(netdev);
 425        int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 426
 427        /* set MTU */
 428        if (netif_running(netdev)) {
 429                while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 430                        msleep(1);
 431                netdev->mtu = new_mtu;
 432                adapter->hw.max_frame_size = new_mtu;
 433                adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3;
 434                atl1e_down(adapter);
 435                atl1e_up(adapter);
 436                clear_bit(__AT_RESETTING, &adapter->flags);
 437        }
 438        return 0;
 439}
 440
 441/*
 442 *  caller should hold mdio_lock
 443 */
 444static int atl1e_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 445{
 446        struct atl1e_adapter *adapter = netdev_priv(netdev);
 447        u16 result;
 448
 449        atl1e_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 450        return result;
 451}
 452
 453static void atl1e_mdio_write(struct net_device *netdev, int phy_id,
 454                             int reg_num, int val)
 455{
 456        struct atl1e_adapter *adapter = netdev_priv(netdev);
 457
 458        if (atl1e_write_phy_reg(&adapter->hw,
 459                                reg_num & MDIO_REG_ADDR_MASK, val))
 460                netdev_err(netdev, "write phy register failed\n");
 461}
 462
 463static int atl1e_mii_ioctl(struct net_device *netdev,
 464                           struct ifreq *ifr, int cmd)
 465{
 466        struct atl1e_adapter *adapter = netdev_priv(netdev);
 467        struct mii_ioctl_data *data = if_mii(ifr);
 468        unsigned long flags;
 469        int retval = 0;
 470
 471        if (!netif_running(netdev))
 472                return -EINVAL;
 473
 474        spin_lock_irqsave(&adapter->mdio_lock, flags);
 475        switch (cmd) {
 476        case SIOCGMIIPHY:
 477                data->phy_id = 0;
 478                break;
 479
 480        case SIOCGMIIREG:
 481                if (atl1e_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 482                                    &data->val_out)) {
 483                        retval = -EIO;
 484                        goto out;
 485                }
 486                break;
 487
 488        case SIOCSMIIREG:
 489                if (data->reg_num & ~(0x1F)) {
 490                        retval = -EFAULT;
 491                        goto out;
 492                }
 493
 494                netdev_dbg(adapter->netdev, "<atl1e_mii_ioctl> write %x %x\n",
 495                           data->reg_num, data->val_in);
 496                if (atl1e_write_phy_reg(&adapter->hw,
 497                                     data->reg_num, data->val_in)) {
 498                        retval = -EIO;
 499                        goto out;
 500                }
 501                break;
 502
 503        default:
 504                retval = -EOPNOTSUPP;
 505                break;
 506        }
 507out:
 508        spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 509        return retval;
 510
 511}
 512
 513static int atl1e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 514{
 515        switch (cmd) {
 516        case SIOCGMIIPHY:
 517        case SIOCGMIIREG:
 518        case SIOCSMIIREG:
 519                return atl1e_mii_ioctl(netdev, ifr, cmd);
 520        default:
 521                return -EOPNOTSUPP;
 522        }
 523}
 524
 525static void atl1e_setup_pcicmd(struct pci_dev *pdev)
 526{
 527        u16 cmd;
 528
 529        pci_read_config_word(pdev, PCI_COMMAND, &cmd);
 530        cmd &= ~(PCI_COMMAND_INTX_DISABLE | PCI_COMMAND_IO);
 531        cmd |=  (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 532        pci_write_config_word(pdev, PCI_COMMAND, cmd);
 533
 534        /*
 535         * some motherboards BIOS(PXE/EFI) driver may set PME
 536         * while they transfer control to OS (Windows/Linux)
 537         * so we should clear this bit before NIC work normally
 538         */
 539        pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
 540        msleep(1);
 541}
 542
 543/**
 544 * atl1e_alloc_queues - Allocate memory for all rings
 545 * @adapter: board private structure to initialize
 546 *
 547 */
 548static int atl1e_alloc_queues(struct atl1e_adapter *adapter)
 549{
 550        return 0;
 551}
 552
 553/**
 554 * atl1e_sw_init - Initialize general software structures (struct atl1e_adapter)
 555 * @adapter: board private structure to initialize
 556 *
 557 * atl1e_sw_init initializes the Adapter private data structure.
 558 * Fields are initialized based on PCI device information and
 559 * OS network device settings (MTU size).
 560 */
 561static int atl1e_sw_init(struct atl1e_adapter *adapter)
 562{
 563        struct atl1e_hw *hw   = &adapter->hw;
 564        struct pci_dev  *pdev = adapter->pdev;
 565        u32 phy_status_data = 0;
 566
 567        adapter->wol = 0;
 568        adapter->link_speed = SPEED_0;   /* hardware init */
 569        adapter->link_duplex = FULL_DUPLEX;
 570        adapter->num_rx_queues = 1;
 571
 572        /* PCI config space info */
 573        hw->vendor_id = pdev->vendor;
 574        hw->device_id = pdev->device;
 575        hw->subsystem_vendor_id = pdev->subsystem_vendor;
 576        hw->subsystem_id = pdev->subsystem_device;
 577        hw->revision_id  = pdev->revision;
 578
 579        pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 580
 581        phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 582        /* nic type */
 583        if (hw->revision_id >= 0xF0) {
 584                hw->nic_type = athr_l2e_revB;
 585        } else {
 586                if (phy_status_data & PHY_STATUS_100M)
 587                        hw->nic_type = athr_l1e;
 588                else
 589                        hw->nic_type = athr_l2e_revA;
 590        }
 591
 592        phy_status_data = AT_READ_REG(hw, REG_PHY_STATUS);
 593
 594        if (phy_status_data & PHY_STATUS_EMI_CA)
 595                hw->emi_ca = true;
 596        else
 597                hw->emi_ca = false;
 598
 599        hw->phy_configured = false;
 600        hw->preamble_len = 7;
 601        hw->max_frame_size = adapter->netdev->mtu;
 602        hw->rx_jumbo_th = (hw->max_frame_size + ETH_HLEN +
 603                                VLAN_HLEN + ETH_FCS_LEN + 7) >> 3;
 604
 605        hw->rrs_type = atl1e_rrs_disable;
 606        hw->indirect_tab = 0;
 607        hw->base_cpu = 0;
 608
 609        /* need confirm */
 610
 611        hw->ict = 50000;                 /* 100ms */
 612        hw->smb_timer = 200000;          /* 200ms  */
 613        hw->tpd_burst = 5;
 614        hw->rrd_thresh = 1;
 615        hw->tpd_thresh = adapter->tx_ring.count / 2;
 616        hw->rx_count_down = 4;  /* 2us resolution */
 617        hw->tx_count_down = hw->imt * 4 / 3;
 618        hw->dmar_block = atl1e_dma_req_1024;
 619        hw->dmaw_block = atl1e_dma_req_1024;
 620        hw->dmar_dly_cnt = 15;
 621        hw->dmaw_dly_cnt = 4;
 622
 623        if (atl1e_alloc_queues(adapter)) {
 624                netdev_err(adapter->netdev, "Unable to allocate memory for queues\n");
 625                return -ENOMEM;
 626        }
 627
 628        atomic_set(&adapter->irq_sem, 1);
 629        spin_lock_init(&adapter->mdio_lock);
 630
 631        set_bit(__AT_DOWN, &adapter->flags);
 632
 633        return 0;
 634}
 635
 636/**
 637 * atl1e_clean_tx_ring - Free Tx-skb
 638 * @adapter: board private structure
 639 */
 640static void atl1e_clean_tx_ring(struct atl1e_adapter *adapter)
 641{
 642        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 643        struct atl1e_tx_buffer *tx_buffer = NULL;
 644        struct pci_dev *pdev = adapter->pdev;
 645        u16 index, ring_count;
 646
 647        if (tx_ring->desc == NULL || tx_ring->tx_buffer == NULL)
 648                return;
 649
 650        ring_count = tx_ring->count;
 651        /* first unmmap dma */
 652        for (index = 0; index < ring_count; index++) {
 653                tx_buffer = &tx_ring->tx_buffer[index];
 654                if (tx_buffer->dma) {
 655                        if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
 656                                dma_unmap_single(&pdev->dev, tx_buffer->dma,
 657                                                 tx_buffer->length,
 658                                                 DMA_TO_DEVICE);
 659                        else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
 660                                dma_unmap_page(&pdev->dev, tx_buffer->dma,
 661                                               tx_buffer->length,
 662                                               DMA_TO_DEVICE);
 663                        tx_buffer->dma = 0;
 664                }
 665        }
 666        /* second free skb */
 667        for (index = 0; index < ring_count; index++) {
 668                tx_buffer = &tx_ring->tx_buffer[index];
 669                if (tx_buffer->skb) {
 670                        dev_kfree_skb_any(tx_buffer->skb);
 671                        tx_buffer->skb = NULL;
 672                }
 673        }
 674        /* Zero out Tx-buffers */
 675        memset(tx_ring->desc, 0, sizeof(struct atl1e_tpd_desc) *
 676                                ring_count);
 677        memset(tx_ring->tx_buffer, 0, sizeof(struct atl1e_tx_buffer) *
 678                                ring_count);
 679}
 680
 681/**
 682 * atl1e_clean_rx_ring - Free rx-reservation skbs
 683 * @adapter: board private structure
 684 */
 685static void atl1e_clean_rx_ring(struct atl1e_adapter *adapter)
 686{
 687        struct atl1e_rx_ring *rx_ring =
 688                &adapter->rx_ring;
 689        struct atl1e_rx_page_desc *rx_page_desc = rx_ring->rx_page_desc;
 690        u16 i, j;
 691
 692
 693        if (adapter->ring_vir_addr == NULL)
 694                return;
 695        /* Zero out the descriptor ring */
 696        for (i = 0; i < adapter->num_rx_queues; i++) {
 697                for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 698                        if (rx_page_desc[i].rx_page[j].addr != NULL) {
 699                                memset(rx_page_desc[i].rx_page[j].addr, 0,
 700                                                rx_ring->real_page_size);
 701                        }
 702                }
 703        }
 704}
 705
 706static void atl1e_cal_ring_size(struct atl1e_adapter *adapter, u32 *ring_size)
 707{
 708        *ring_size = ((u32)(adapter->tx_ring.count *
 709                     sizeof(struct atl1e_tpd_desc) + 7
 710                        /* tx ring, qword align */
 711                     + adapter->rx_ring.real_page_size * AT_PAGE_NUM_PER_QUEUE *
 712                        adapter->num_rx_queues + 31
 713                        /* rx ring,  32 bytes align */
 714                     + (1 + AT_PAGE_NUM_PER_QUEUE * adapter->num_rx_queues) *
 715                        sizeof(u32) + 3));
 716                        /* tx, rx cmd, dword align   */
 717}
 718
 719static void atl1e_init_ring_resources(struct atl1e_adapter *adapter)
 720{
 721        struct atl1e_rx_ring *rx_ring = NULL;
 722
 723        rx_ring = &adapter->rx_ring;
 724
 725        rx_ring->real_page_size = adapter->rx_ring.page_size
 726                                 + adapter->hw.max_frame_size
 727                                 + ETH_HLEN + VLAN_HLEN
 728                                 + ETH_FCS_LEN;
 729        rx_ring->real_page_size = roundup(rx_ring->real_page_size, 32);
 730        atl1e_cal_ring_size(adapter, &adapter->ring_size);
 731
 732        adapter->ring_vir_addr = NULL;
 733        adapter->rx_ring.desc = NULL;
 734        rwlock_init(&adapter->tx_ring.tx_lock);
 735}
 736
 737/*
 738 * Read / Write Ptr Initialize:
 739 */
 740static void atl1e_init_ring_ptrs(struct atl1e_adapter *adapter)
 741{
 742        struct atl1e_tx_ring *tx_ring = NULL;
 743        struct atl1e_rx_ring *rx_ring = NULL;
 744        struct atl1e_rx_page_desc *rx_page_desc = NULL;
 745        int i, j;
 746
 747        tx_ring = &adapter->tx_ring;
 748        rx_ring = &adapter->rx_ring;
 749        rx_page_desc = rx_ring->rx_page_desc;
 750
 751        tx_ring->next_to_use = 0;
 752        atomic_set(&tx_ring->next_to_clean, 0);
 753
 754        for (i = 0; i < adapter->num_rx_queues; i++) {
 755                rx_page_desc[i].rx_using  = 0;
 756                rx_page_desc[i].rx_nxseq = 0;
 757                for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 758                        *rx_page_desc[i].rx_page[j].write_offset_addr = 0;
 759                        rx_page_desc[i].rx_page[j].read_offset = 0;
 760                }
 761        }
 762}
 763
 764/**
 765 * atl1e_free_ring_resources - Free Tx / RX descriptor Resources
 766 * @adapter: board private structure
 767 *
 768 * Free all transmit software resources
 769 */
 770static void atl1e_free_ring_resources(struct atl1e_adapter *adapter)
 771{
 772        struct pci_dev *pdev = adapter->pdev;
 773
 774        atl1e_clean_tx_ring(adapter);
 775        atl1e_clean_rx_ring(adapter);
 776
 777        if (adapter->ring_vir_addr) {
 778                dma_free_coherent(&pdev->dev, adapter->ring_size,
 779                                  adapter->ring_vir_addr, adapter->ring_dma);
 780                adapter->ring_vir_addr = NULL;
 781        }
 782
 783        if (adapter->tx_ring.tx_buffer) {
 784                kfree(adapter->tx_ring.tx_buffer);
 785                adapter->tx_ring.tx_buffer = NULL;
 786        }
 787}
 788
 789/**
 790 * atl1e_setup_ring_resources - allocate Tx / RX descriptor resources
 791 * @adapter: board private structure
 792 *
 793 * Return 0 on success, negative on failure
 794 */
 795static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 796{
 797        struct pci_dev *pdev = adapter->pdev;
 798        struct atl1e_tx_ring *tx_ring;
 799        struct atl1e_rx_ring *rx_ring;
 800        struct atl1e_rx_page_desc  *rx_page_desc;
 801        int size, i, j;
 802        u32 offset = 0;
 803        int err = 0;
 804
 805        if (adapter->ring_vir_addr != NULL)
 806                return 0; /* alloced already */
 807
 808        tx_ring = &adapter->tx_ring;
 809        rx_ring = &adapter->rx_ring;
 810
 811        /* real ring DMA buffer */
 812
 813        size = adapter->ring_size;
 814        adapter->ring_vir_addr = dma_alloc_coherent(&pdev->dev,
 815                                                    adapter->ring_size,
 816                                                    &adapter->ring_dma, GFP_KERNEL);
 817        if (adapter->ring_vir_addr == NULL) {
 818                netdev_err(adapter->netdev,
 819                           "dma_alloc_coherent failed, size = D%d\n", size);
 820                return -ENOMEM;
 821        }
 822
 823        rx_page_desc = rx_ring->rx_page_desc;
 824
 825        /* Init TPD Ring */
 826        tx_ring->dma = roundup(adapter->ring_dma, 8);
 827        offset = tx_ring->dma - adapter->ring_dma;
 828        tx_ring->desc = adapter->ring_vir_addr + offset;
 829        size = sizeof(struct atl1e_tx_buffer) * (tx_ring->count);
 830        tx_ring->tx_buffer = kzalloc(size, GFP_KERNEL);
 831        if (tx_ring->tx_buffer == NULL) {
 832                err = -ENOMEM;
 833                goto failed;
 834        }
 835
 836        /* Init RXF-Pages */
 837        offset += (sizeof(struct atl1e_tpd_desc) * tx_ring->count);
 838        offset = roundup(offset, 32);
 839
 840        for (i = 0; i < adapter->num_rx_queues; i++) {
 841                for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 842                        rx_page_desc[i].rx_page[j].dma =
 843                                adapter->ring_dma + offset;
 844                        rx_page_desc[i].rx_page[j].addr =
 845                                adapter->ring_vir_addr + offset;
 846                        offset += rx_ring->real_page_size;
 847                }
 848        }
 849
 850        /* Init CMB dma address */
 851        tx_ring->cmb_dma = adapter->ring_dma + offset;
 852        tx_ring->cmb = adapter->ring_vir_addr + offset;
 853        offset += sizeof(u32);
 854
 855        for (i = 0; i < adapter->num_rx_queues; i++) {
 856                for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 857                        rx_page_desc[i].rx_page[j].write_offset_dma =
 858                                adapter->ring_dma + offset;
 859                        rx_page_desc[i].rx_page[j].write_offset_addr =
 860                                adapter->ring_vir_addr + offset;
 861                        offset += sizeof(u32);
 862                }
 863        }
 864
 865        if (unlikely(offset > adapter->ring_size)) {
 866                netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 867                           offset, adapter->ring_size);
 868                err = -1;
 869                goto failed;
 870        }
 871
 872        return 0;
 873failed:
 874        if (adapter->ring_vir_addr != NULL) {
 875                dma_free_coherent(&pdev->dev, adapter->ring_size,
 876                                  adapter->ring_vir_addr, adapter->ring_dma);
 877                adapter->ring_vir_addr = NULL;
 878        }
 879        return err;
 880}
 881
 882static inline void atl1e_configure_des_ring(struct atl1e_adapter *adapter)
 883{
 884
 885        struct atl1e_hw *hw = &adapter->hw;
 886        struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
 887        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
 888        struct atl1e_rx_page_desc *rx_page_desc = NULL;
 889        int i, j;
 890
 891        AT_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
 892                        (u32)((adapter->ring_dma & AT_DMA_HI_ADDR_MASK) >> 32));
 893        AT_WRITE_REG(hw, REG_TPD_BASE_ADDR_LO,
 894                        (u32)((tx_ring->dma) & AT_DMA_LO_ADDR_MASK));
 895        AT_WRITE_REG(hw, REG_TPD_RING_SIZE, (u16)(tx_ring->count));
 896        AT_WRITE_REG(hw, REG_HOST_TX_CMB_LO,
 897                        (u32)((tx_ring->cmb_dma) & AT_DMA_LO_ADDR_MASK));
 898
 899        rx_page_desc = rx_ring->rx_page_desc;
 900        /* RXF Page Physical address / Page Length */
 901        for (i = 0; i < AT_MAX_RECEIVE_QUEUE; i++) {
 902                AT_WRITE_REG(hw, atl1e_rx_page_hi_addr_regs[i],
 903                                 (u32)((adapter->ring_dma &
 904                                 AT_DMA_HI_ADDR_MASK) >> 32));
 905                for (j = 0; j < AT_PAGE_NUM_PER_QUEUE; j++) {
 906                        u32 page_phy_addr;
 907                        u32 offset_phy_addr;
 908
 909                        page_phy_addr = rx_page_desc[i].rx_page[j].dma;
 910                        offset_phy_addr =
 911                                   rx_page_desc[i].rx_page[j].write_offset_dma;
 912
 913                        AT_WRITE_REG(hw, atl1e_rx_page_lo_addr_regs[i][j],
 914                                        page_phy_addr & AT_DMA_LO_ADDR_MASK);
 915                        AT_WRITE_REG(hw, atl1e_rx_page_write_offset_regs[i][j],
 916                                        offset_phy_addr & AT_DMA_LO_ADDR_MASK);
 917                        AT_WRITE_REGB(hw, atl1e_rx_page_vld_regs[i][j], 1);
 918                }
 919        }
 920        /* Page Length */
 921        AT_WRITE_REG(hw, REG_HOST_RXFPAGE_SIZE, rx_ring->page_size);
 922        /* Load all of base address above */
 923        AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 924}
 925
 926static inline void atl1e_configure_tx(struct atl1e_adapter *adapter)
 927{
 928        struct atl1e_hw *hw = &adapter->hw;
 929        u32 dev_ctrl_data = 0;
 930        u32 max_pay_load = 0;
 931        u32 jumbo_thresh = 0;
 932        u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
 933
 934        /* configure TXQ param */
 935        if (hw->nic_type != athr_l2e_revB) {
 936                extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
 937                if (hw->max_frame_size <= 1500) {
 938                        jumbo_thresh = hw->max_frame_size + extra_size;
 939                } else if (hw->max_frame_size < 6*1024) {
 940                        jumbo_thresh =
 941                                (hw->max_frame_size + extra_size) * 2 / 3;
 942                } else {
 943                        jumbo_thresh = (hw->max_frame_size + extra_size) / 2;
 944                }
 945                AT_WRITE_REG(hw, REG_TX_EARLY_TH, (jumbo_thresh + 7) >> 3);
 946        }
 947
 948        dev_ctrl_data = AT_READ_REG(hw, REG_DEVICE_CTRL);
 949
 950        max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT)) &
 951                        DEVICE_CTRL_MAX_PAYLOAD_MASK;
 952
 953        hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
 954
 955        max_pay_load  = ((dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT)) &
 956                        DEVICE_CTRL_MAX_RREQ_SZ_MASK;
 957        hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
 958
 959        if (hw->nic_type != athr_l2e_revB)
 960                AT_WRITE_REGW(hw, REG_TXQ_CTRL + 2,
 961                              atl1e_pay_load_size[hw->dmar_block]);
 962        /* enable TXQ */
 963        AT_WRITE_REGW(hw, REG_TXQ_CTRL,
 964                        (((u16)hw->tpd_burst & TXQ_CTRL_NUM_TPD_BURST_MASK)
 965                         << TXQ_CTRL_NUM_TPD_BURST_SHIFT)
 966                        | TXQ_CTRL_ENH_MODE | TXQ_CTRL_EN);
 967}
 968
 969static inline void atl1e_configure_rx(struct atl1e_adapter *adapter)
 970{
 971        struct atl1e_hw *hw = &adapter->hw;
 972        u32 rxf_len  = 0;
 973        u32 rxf_low  = 0;
 974        u32 rxf_high = 0;
 975        u32 rxf_thresh_data = 0;
 976        u32 rxq_ctrl_data = 0;
 977
 978        if (hw->nic_type != athr_l2e_revB) {
 979                AT_WRITE_REGW(hw, REG_RXQ_JMBOSZ_RRDTIM,
 980                              (u16)((hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK) <<
 981                              RXQ_JMBOSZ_TH_SHIFT |
 982                              (1 & RXQ_JMBO_LKAH_MASK) <<
 983                              RXQ_JMBO_LKAH_SHIFT));
 984
 985                rxf_len  = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
 986                rxf_high = rxf_len * 4 / 5;
 987                rxf_low  = rxf_len / 5;
 988                rxf_thresh_data = ((rxf_high  & RXQ_RXF_PAUSE_TH_HI_MASK)
 989                                  << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
 990                                  ((rxf_low & RXQ_RXF_PAUSE_TH_LO_MASK)
 991                                  << RXQ_RXF_PAUSE_TH_LO_SHIFT);
 992
 993                AT_WRITE_REG(hw, REG_RXQ_RXF_PAUSE_THRESH, rxf_thresh_data);
 994        }
 995
 996        /* RRS */
 997        AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
 998        AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
 999
1000        if (hw->rrs_type & atl1e_rrs_ipv4)
1001                rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4;
1002
1003        if (hw->rrs_type & atl1e_rrs_ipv4_tcp)
1004                rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV4_TCP;
1005
1006        if (hw->rrs_type & atl1e_rrs_ipv6)
1007                rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6;
1008
1009        if (hw->rrs_type & atl1e_rrs_ipv6_tcp)
1010                rxq_ctrl_data |= RXQ_CTRL_HASH_TYPE_IPV6_TCP;
1011
1012        if (hw->rrs_type != atl1e_rrs_disable)
1013                rxq_ctrl_data |=
1014                        (RXQ_CTRL_HASH_ENABLE | RXQ_CTRL_RSS_MODE_MQUESINT);
1015
1016        rxq_ctrl_data |= RXQ_CTRL_IPV6_XSUM_VERIFY_EN | RXQ_CTRL_PBA_ALIGN_32 |
1017                         RXQ_CTRL_CUT_THRU_EN | RXQ_CTRL_EN;
1018
1019        AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1020}
1021
1022static inline void atl1e_configure_dma(struct atl1e_adapter *adapter)
1023{
1024        struct atl1e_hw *hw = &adapter->hw;
1025        u32 dma_ctrl_data = 0;
1026
1027        dma_ctrl_data = DMA_CTRL_RXCMB_EN;
1028        dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1029                << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1030        dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1031                << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1032        dma_ctrl_data |= DMA_CTRL_DMAR_REQ_PRI | DMA_CTRL_DMAR_OUT_ORDER;
1033        dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1034                << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1035        dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1036                << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1037
1038        AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1039}
1040
1041static void atl1e_setup_mac_ctrl(struct atl1e_adapter *adapter)
1042{
1043        u32 value;
1044        struct atl1e_hw *hw = &adapter->hw;
1045        struct net_device *netdev = adapter->netdev;
1046
1047        /* Config MAC CTRL Register */
1048        value = MAC_CTRL_TX_EN |
1049                MAC_CTRL_RX_EN ;
1050
1051        if (FULL_DUPLEX == adapter->link_duplex)
1052                value |= MAC_CTRL_DUPLX;
1053
1054        value |= ((u32)((SPEED_1000 == adapter->link_speed) ?
1055                          MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1056                          MAC_CTRL_SPEED_SHIFT);
1057        value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1058
1059        value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1060        value |= (((u32)adapter->hw.preamble_len &
1061                  MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1062
1063        __atl1e_vlan_mode(netdev->features, &value);
1064
1065        value |= MAC_CTRL_BC_EN;
1066        if (netdev->flags & IFF_PROMISC)
1067                value |= MAC_CTRL_PROMIS_EN;
1068        if (netdev->flags & IFF_ALLMULTI)
1069                value |= MAC_CTRL_MC_ALL_EN;
1070        if (netdev->features & NETIF_F_RXALL)
1071                value |= MAC_CTRL_DBG;
1072        AT_WRITE_REG(hw, REG_MAC_CTRL, value);
1073}
1074
1075/**
1076 * atl1e_configure - Configure Transmit&Receive Unit after Reset
1077 * @adapter: board private structure
1078 *
1079 * Configure the Tx /Rx unit of the MAC after a reset.
1080 */
1081static int atl1e_configure(struct atl1e_adapter *adapter)
1082{
1083        struct atl1e_hw *hw = &adapter->hw;
1084
1085        u32 intr_status_data = 0;
1086
1087        /* clear interrupt status */
1088        AT_WRITE_REG(hw, REG_ISR, ~0);
1089
1090        /* 1. set MAC Address */
1091        atl1e_hw_set_mac_addr(hw);
1092
1093        /* 2. Init the Multicast HASH table done by set_muti */
1094
1095        /* 3. Clear any WOL status */
1096        AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1097
1098        /* 4. Descripter Ring BaseMem/Length/Read ptr/Write ptr
1099         *    TPD Ring/SMB/RXF0 Page CMBs, they use the same
1100         *    High 32bits memory */
1101        atl1e_configure_des_ring(adapter);
1102
1103        /* 5. set Interrupt Moderator Timer */
1104        AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, hw->imt);
1105        AT_WRITE_REGW(hw, REG_IRQ_MODU_TIMER2_INIT, hw->imt);
1106        AT_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_LED_MODE |
1107                        MASTER_CTRL_ITIMER_EN | MASTER_CTRL_ITIMER2_EN);
1108
1109        /* 6. rx/tx threshold to trig interrupt */
1110        AT_WRITE_REGW(hw, REG_TRIG_RRD_THRESH, hw->rrd_thresh);
1111        AT_WRITE_REGW(hw, REG_TRIG_TPD_THRESH, hw->tpd_thresh);
1112        AT_WRITE_REGW(hw, REG_TRIG_RXTIMER, hw->rx_count_down);
1113        AT_WRITE_REGW(hw, REG_TRIG_TXTIMER, hw->tx_count_down);
1114
1115        /* 7. set Interrupt Clear Timer */
1116        AT_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, hw->ict);
1117
1118        /* 8. set MTU */
1119        AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1120                        VLAN_HLEN + ETH_FCS_LEN);
1121
1122        /* 9. config TXQ early tx threshold */
1123        atl1e_configure_tx(adapter);
1124
1125        /* 10. config RXQ */
1126        atl1e_configure_rx(adapter);
1127
1128        /* 11. config  DMA Engine */
1129        atl1e_configure_dma(adapter);
1130
1131        /* 12. smb timer to trig interrupt */
1132        AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, hw->smb_timer);
1133
1134        intr_status_data = AT_READ_REG(hw, REG_ISR);
1135        if (unlikely((intr_status_data & ISR_PHY_LINKDOWN) != 0)) {
1136                netdev_err(adapter->netdev,
1137                           "atl1e_configure failed, PCIE phy link down\n");
1138                return -1;
1139        }
1140
1141        AT_WRITE_REG(hw, REG_ISR, 0x7fffffff);
1142        return 0;
1143}
1144
1145/**
1146 * atl1e_get_stats - Get System Network Statistics
1147 * @netdev: network interface device structure
1148 *
1149 * Returns the address of the device statistics structure.
1150 * The statistics are actually updated from the timer callback.
1151 */
1152static struct net_device_stats *atl1e_get_stats(struct net_device *netdev)
1153{
1154        struct atl1e_adapter *adapter = netdev_priv(netdev);
1155        struct atl1e_hw_stats  *hw_stats = &adapter->hw_stats;
1156        struct net_device_stats *net_stats = &netdev->stats;
1157
1158        net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1159        net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1160        net_stats->multicast  = hw_stats->rx_mcast;
1161        net_stats->collisions = hw_stats->tx_1_col +
1162                                hw_stats->tx_2_col +
1163                                hw_stats->tx_late_col +
1164                                hw_stats->tx_abort_col;
1165
1166        net_stats->rx_errors  = hw_stats->rx_frag +
1167                                hw_stats->rx_fcs_err +
1168                                hw_stats->rx_len_err +
1169                                hw_stats->rx_sz_ov +
1170                                hw_stats->rx_rrd_ov +
1171                                hw_stats->rx_align_err +
1172                                hw_stats->rx_rxf_ov;
1173
1174        net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1175        net_stats->rx_length_errors = hw_stats->rx_len_err;
1176        net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1177        net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1178        net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1179
1180        net_stats->tx_errors = hw_stats->tx_late_col +
1181                               hw_stats->tx_abort_col +
1182                               hw_stats->tx_underrun +
1183                               hw_stats->tx_trunc;
1184
1185        net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1186        net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1187        net_stats->tx_window_errors  = hw_stats->tx_late_col;
1188
1189        net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1190        net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1191
1192        return net_stats;
1193}
1194
1195static void atl1e_update_hw_stats(struct atl1e_adapter *adapter)
1196{
1197        u16 hw_reg_addr = 0;
1198        unsigned long *stats_item = NULL;
1199
1200        /* update rx status */
1201        hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1202        stats_item  = &adapter->hw_stats.rx_ok;
1203        while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1204                *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1205                stats_item++;
1206                hw_reg_addr += 4;
1207        }
1208        /* update tx status */
1209        hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1210        stats_item  = &adapter->hw_stats.tx_ok;
1211        while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1212                *stats_item += AT_READ_REG(&adapter->hw, hw_reg_addr);
1213                stats_item++;
1214                hw_reg_addr += 4;
1215        }
1216}
1217
1218static inline void atl1e_clear_phy_int(struct atl1e_adapter *adapter)
1219{
1220        u16 phy_data;
1221
1222        spin_lock(&adapter->mdio_lock);
1223        atl1e_read_phy_reg(&adapter->hw, MII_INT_STATUS, &phy_data);
1224        spin_unlock(&adapter->mdio_lock);
1225}
1226
1227static bool atl1e_clean_tx_irq(struct atl1e_adapter *adapter)
1228{
1229        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1230        struct atl1e_tx_buffer *tx_buffer = NULL;
1231        u16 hw_next_to_clean = AT_READ_REGW(&adapter->hw, REG_TPD_CONS_IDX);
1232        u16 next_to_clean = atomic_read(&tx_ring->next_to_clean);
1233
1234        while (next_to_clean != hw_next_to_clean) {
1235                tx_buffer = &tx_ring->tx_buffer[next_to_clean];
1236                if (tx_buffer->dma) {
1237                        if (tx_buffer->flags & ATL1E_TX_PCIMAP_SINGLE)
1238                                dma_unmap_single(&adapter->pdev->dev,
1239                                                 tx_buffer->dma,
1240                                                 tx_buffer->length,
1241                                                 DMA_TO_DEVICE);
1242                        else if (tx_buffer->flags & ATL1E_TX_PCIMAP_PAGE)
1243                                dma_unmap_page(&adapter->pdev->dev,
1244                                               tx_buffer->dma,
1245                                               tx_buffer->length,
1246                                               DMA_TO_DEVICE);
1247                        tx_buffer->dma = 0;
1248                }
1249
1250                if (tx_buffer->skb) {
1251                        dev_consume_skb_irq(tx_buffer->skb);
1252                        tx_buffer->skb = NULL;
1253                }
1254
1255                if (++next_to_clean == tx_ring->count)
1256                        next_to_clean = 0;
1257        }
1258
1259        atomic_set(&tx_ring->next_to_clean, next_to_clean);
1260
1261        if (netif_queue_stopped(adapter->netdev) &&
1262                        netif_carrier_ok(adapter->netdev)) {
1263                netif_wake_queue(adapter->netdev);
1264        }
1265
1266        return true;
1267}
1268
1269/**
1270 * atl1e_intr - Interrupt Handler
1271 * @irq: interrupt number
1272 * @data: pointer to a network interface device structure
1273 */
1274static irqreturn_t atl1e_intr(int irq, void *data)
1275{
1276        struct net_device *netdev  = data;
1277        struct atl1e_adapter *adapter = netdev_priv(netdev);
1278        struct atl1e_hw *hw = &adapter->hw;
1279        int max_ints = AT_MAX_INT_WORK;
1280        int handled = IRQ_NONE;
1281        u32 status;
1282
1283        do {
1284                status = AT_READ_REG(hw, REG_ISR);
1285                if ((status & IMR_NORMAL_MASK) == 0 ||
1286                                (status & ISR_DIS_INT) != 0) {
1287                        if (max_ints != AT_MAX_INT_WORK)
1288                                handled = IRQ_HANDLED;
1289                        break;
1290                }
1291                /* link event */
1292                if (status & ISR_GPHY)
1293                        atl1e_clear_phy_int(adapter);
1294                /* Ack ISR */
1295                AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1296
1297                handled = IRQ_HANDLED;
1298                /* check if PCIE PHY Link down */
1299                if (status & ISR_PHY_LINKDOWN) {
1300                        netdev_err(adapter->netdev,
1301                                   "pcie phy linkdown %x\n", status);
1302                        if (netif_running(adapter->netdev)) {
1303                                /* reset MAC */
1304                                atl1e_irq_reset(adapter);
1305                                schedule_work(&adapter->reset_task);
1306                                break;
1307                        }
1308                }
1309
1310                /* check if DMA read/write error */
1311                if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
1312                        netdev_err(adapter->netdev,
1313                                   "PCIE DMA RW error (status = 0x%x)\n",
1314                                   status);
1315                        atl1e_irq_reset(adapter);
1316                        schedule_work(&adapter->reset_task);
1317                        break;
1318                }
1319
1320                if (status & ISR_SMB)
1321                        atl1e_update_hw_stats(adapter);
1322
1323                /* link event */
1324                if (status & (ISR_GPHY | ISR_MANUAL)) {
1325                        netdev->stats.tx_carrier_errors++;
1326                        atl1e_link_chg_event(adapter);
1327                        break;
1328                }
1329
1330                /* transmit event */
1331                if (status & ISR_TX_EVENT)
1332                        atl1e_clean_tx_irq(adapter);
1333
1334                if (status & ISR_RX_EVENT) {
1335                        /*
1336                         * disable rx interrupts, without
1337                         * the synchronize_irq bit
1338                         */
1339                        AT_WRITE_REG(hw, REG_IMR,
1340                                     IMR_NORMAL_MASK & ~ISR_RX_EVENT);
1341                        AT_WRITE_FLUSH(hw);
1342                        if (likely(napi_schedule_prep(
1343                                   &adapter->napi)))
1344                                __napi_schedule(&adapter->napi);
1345                }
1346        } while (--max_ints > 0);
1347        /* re-enable Interrupt*/
1348        AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1349
1350        return handled;
1351}
1352
1353static inline void atl1e_rx_checksum(struct atl1e_adapter *adapter,
1354                  struct sk_buff *skb, struct atl1e_recv_ret_status *prrs)
1355{
1356        u8 *packet = (u8 *)(prrs + 1);
1357        struct iphdr *iph;
1358        u16 head_len = ETH_HLEN;
1359        u16 pkt_flags;
1360        u16 err_flags;
1361
1362        skb_checksum_none_assert(skb);
1363        pkt_flags = prrs->pkt_flag;
1364        err_flags = prrs->err_flag;
1365        if (((pkt_flags & RRS_IS_IPV4) || (pkt_flags & RRS_IS_IPV6)) &&
1366                ((pkt_flags & RRS_IS_TCP) || (pkt_flags & RRS_IS_UDP))) {
1367                if (pkt_flags & RRS_IS_IPV4) {
1368                        if (pkt_flags & RRS_IS_802_3)
1369                                head_len += 8;
1370                        iph = (struct iphdr *) (packet + head_len);
1371                        if (iph->frag_off != 0 && !(pkt_flags & RRS_IS_IP_DF))
1372                                goto hw_xsum;
1373                }
1374                if (!(err_flags & (RRS_ERR_IP_CSUM | RRS_ERR_L4_CSUM))) {
1375                        skb->ip_summed = CHECKSUM_UNNECESSARY;
1376                        return;
1377                }
1378        }
1379
1380hw_xsum :
1381        return;
1382}
1383
1384static struct atl1e_rx_page *atl1e_get_rx_page(struct atl1e_adapter *adapter,
1385                                               u8 que)
1386{
1387        struct atl1e_rx_page_desc *rx_page_desc =
1388                (struct atl1e_rx_page_desc *) adapter->rx_ring.rx_page_desc;
1389        u8 rx_using = rx_page_desc[que].rx_using;
1390
1391        return &(rx_page_desc[que].rx_page[rx_using]);
1392}
1393
1394static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
1395                   int *work_done, int work_to_do)
1396{
1397        struct net_device *netdev  = adapter->netdev;
1398        struct atl1e_rx_ring *rx_ring = &adapter->rx_ring;
1399        struct atl1e_rx_page_desc *rx_page_desc =
1400                (struct atl1e_rx_page_desc *) rx_ring->rx_page_desc;
1401        struct sk_buff *skb = NULL;
1402        struct atl1e_rx_page *rx_page = atl1e_get_rx_page(adapter, que);
1403        u32 packet_size, write_offset;
1404        struct atl1e_recv_ret_status *prrs;
1405
1406        write_offset = *(rx_page->write_offset_addr);
1407        if (likely(rx_page->read_offset < write_offset)) {
1408                do {
1409                        if (*work_done >= work_to_do)
1410                                break;
1411                        (*work_done)++;
1412                        /* get new packet's  rrs */
1413                        prrs = (struct atl1e_recv_ret_status *) (rx_page->addr +
1414                                                 rx_page->read_offset);
1415                        /* check sequence number */
1416                        if (prrs->seq_num != rx_page_desc[que].rx_nxseq) {
1417                                netdev_err(netdev,
1418                                           "rx sequence number error (rx=%d) (expect=%d)\n",
1419                                           prrs->seq_num,
1420                                           rx_page_desc[que].rx_nxseq);
1421                                rx_page_desc[que].rx_nxseq++;
1422                                /* just for debug use */
1423                                AT_WRITE_REG(&adapter->hw, REG_DEBUG_DATA0,
1424                                             (((u32)prrs->seq_num) << 16) |
1425                                             rx_page_desc[que].rx_nxseq);
1426                                goto fatal_err;
1427                        }
1428                        rx_page_desc[que].rx_nxseq++;
1429
1430                        /* error packet */
1431                        if ((prrs->pkt_flag & RRS_IS_ERR_FRAME) &&
1432                            !(netdev->features & NETIF_F_RXALL)) {
1433                                if (prrs->err_flag & (RRS_ERR_BAD_CRC |
1434                                        RRS_ERR_DRIBBLE | RRS_ERR_CODE |
1435                                        RRS_ERR_TRUNC)) {
1436                                /* hardware error, discard this packet*/
1437                                        netdev_err(netdev,
1438                                                   "rx packet desc error %x\n",
1439                                                   *((u32 *)prrs + 1));
1440                                        goto skip_pkt;
1441                                }
1442                        }
1443
1444                        packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1445                                        RRS_PKT_SIZE_MASK);
1446                        if (likely(!(netdev->features & NETIF_F_RXFCS)))
1447                                packet_size -= 4; /* CRC */
1448
1449                        skb = netdev_alloc_skb_ip_align(netdev, packet_size);
1450                        if (skb == NULL)
1451                                goto skip_pkt;
1452
1453                        memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
1454                        skb_put(skb, packet_size);
1455                        skb->protocol = eth_type_trans(skb, netdev);
1456                        atl1e_rx_checksum(adapter, skb, prrs);
1457
1458                        if (prrs->pkt_flag & RRS_IS_VLAN_TAG) {
1459                                u16 vlan_tag = (prrs->vtag >> 4) |
1460                                               ((prrs->vtag & 7) << 13) |
1461                                               ((prrs->vtag & 8) << 9);
1462                                netdev_dbg(netdev,
1463                                           "RXD VLAN TAG<RRD>=0x%04x\n",
1464                                           prrs->vtag);
1465                                __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
1466                        }
1467                        napi_gro_receive(&adapter->napi, skb);
1468
1469skip_pkt:
1470        /* skip current packet whether it's ok or not. */
1471                        rx_page->read_offset +=
1472                                (((u32)((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
1473                                RRS_PKT_SIZE_MASK) +
1474                                sizeof(struct atl1e_recv_ret_status) + 31) &
1475                                                0xFFFFFFE0);
1476
1477                        if (rx_page->read_offset >= rx_ring->page_size) {
1478                                /* mark this page clean */
1479                                u16 reg_addr;
1480                                u8  rx_using;
1481
1482                                rx_page->read_offset =
1483                                        *(rx_page->write_offset_addr) = 0;
1484                                rx_using = rx_page_desc[que].rx_using;
1485                                reg_addr =
1486                                        atl1e_rx_page_vld_regs[que][rx_using];
1487                                AT_WRITE_REGB(&adapter->hw, reg_addr, 1);
1488                                rx_page_desc[que].rx_using ^= 1;
1489                                rx_page = atl1e_get_rx_page(adapter, que);
1490                        }
1491                        write_offset = *(rx_page->write_offset_addr);
1492                } while (rx_page->read_offset < write_offset);
1493        }
1494
1495        return;
1496
1497fatal_err:
1498        if (!test_bit(__AT_DOWN, &adapter->flags))
1499                schedule_work(&adapter->reset_task);
1500}
1501
1502/**
1503 * atl1e_clean - NAPI Rx polling callback
1504 * @napi: napi info
1505 * @budget: number of packets to clean
1506 */
1507static int atl1e_clean(struct napi_struct *napi, int budget)
1508{
1509        struct atl1e_adapter *adapter =
1510                        container_of(napi, struct atl1e_adapter, napi);
1511        u32 imr_data;
1512        int work_done = 0;
1513
1514        /* Keep link state information with original netdev */
1515        if (!netif_carrier_ok(adapter->netdev))
1516                goto quit_polling;
1517
1518        atl1e_clean_rx_irq(adapter, 0, &work_done, budget);
1519
1520        /* If no Tx and not enough Rx work done, exit the polling mode */
1521        if (work_done < budget) {
1522quit_polling:
1523                napi_complete_done(napi, work_done);
1524                imr_data = AT_READ_REG(&adapter->hw, REG_IMR);
1525                AT_WRITE_REG(&adapter->hw, REG_IMR, imr_data | ISR_RX_EVENT);
1526                /* test debug */
1527                if (test_bit(__AT_DOWN, &adapter->flags)) {
1528                        atomic_dec(&adapter->irq_sem);
1529                        netdev_err(adapter->netdev,
1530                                   "atl1e_clean is called when AT_DOWN\n");
1531                }
1532                /* reenable RX intr */
1533                /*atl1e_irq_enable(adapter); */
1534
1535        }
1536        return work_done;
1537}
1538
1539#ifdef CONFIG_NET_POLL_CONTROLLER
1540
1541/*
1542 * Polling 'interrupt' - used by things like netconsole to send skbs
1543 * without having to re-enable interrupts. It's not called while
1544 * the interrupt routine is executing.
1545 */
1546static void atl1e_netpoll(struct net_device *netdev)
1547{
1548        struct atl1e_adapter *adapter = netdev_priv(netdev);
1549
1550        disable_irq(adapter->pdev->irq);
1551        atl1e_intr(adapter->pdev->irq, netdev);
1552        enable_irq(adapter->pdev->irq);
1553}
1554#endif
1555
1556static inline u16 atl1e_tpd_avail(struct atl1e_adapter *adapter)
1557{
1558        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1559        u16 next_to_use = 0;
1560        u16 next_to_clean = 0;
1561
1562        next_to_clean = atomic_read(&tx_ring->next_to_clean);
1563        next_to_use   = tx_ring->next_to_use;
1564
1565        return (u16)(next_to_clean > next_to_use) ?
1566                (next_to_clean - next_to_use - 1) :
1567                (tx_ring->count + next_to_clean - next_to_use - 1);
1568}
1569
1570/*
1571 * get next usable tpd
1572 * Note: should call atl1e_tdp_avail to make sure
1573 * there is enough tpd to use
1574 */
1575static struct atl1e_tpd_desc *atl1e_get_tpd(struct atl1e_adapter *adapter)
1576{
1577        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1578        u16 next_to_use = 0;
1579
1580        next_to_use = tx_ring->next_to_use;
1581        if (++tx_ring->next_to_use == tx_ring->count)
1582                tx_ring->next_to_use = 0;
1583
1584        memset(&tx_ring->desc[next_to_use], 0, sizeof(struct atl1e_tpd_desc));
1585        return &tx_ring->desc[next_to_use];
1586}
1587
1588static struct atl1e_tx_buffer *
1589atl1e_get_tx_buffer(struct atl1e_adapter *adapter, struct atl1e_tpd_desc *tpd)
1590{
1591        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1592
1593        return &tx_ring->tx_buffer[tpd - tx_ring->desc];
1594}
1595
1596/* Calculate the transmit packet descript needed*/
1597static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
1598{
1599        int i = 0;
1600        u16 tpd_req = 1;
1601        u16 fg_size = 0;
1602        u16 proto_hdr_len = 0;
1603
1604        for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1605                fg_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
1606                tpd_req += ((fg_size + MAX_TX_BUF_LEN - 1) >> MAX_TX_BUF_SHIFT);
1607        }
1608
1609        if (skb_is_gso(skb)) {
1610                if (skb->protocol == htons(ETH_P_IP) ||
1611                   (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
1612                        proto_hdr_len = skb_transport_offset(skb) +
1613                                        tcp_hdrlen(skb);
1614                        if (proto_hdr_len < skb_headlen(skb)) {
1615                                tpd_req += ((skb_headlen(skb) - proto_hdr_len +
1616                                           MAX_TX_BUF_LEN - 1) >>
1617                                           MAX_TX_BUF_SHIFT);
1618                        }
1619                }
1620
1621        }
1622        return tpd_req;
1623}
1624
1625static int atl1e_tso_csum(struct atl1e_adapter *adapter,
1626                       struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1627{
1628        unsigned short offload_type;
1629        u8 hdr_len;
1630        u32 real_len;
1631
1632        if (skb_is_gso(skb)) {
1633                int err;
1634
1635                err = skb_cow_head(skb, 0);
1636                if (err < 0)
1637                        return err;
1638
1639                offload_type = skb_shinfo(skb)->gso_type;
1640
1641                if (offload_type & SKB_GSO_TCPV4) {
1642                        real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1643                                        + ntohs(ip_hdr(skb)->tot_len));
1644
1645                        if (real_len < skb->len)
1646                                pskb_trim(skb, real_len);
1647
1648                        hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1649                        if (unlikely(skb->len == hdr_len)) {
1650                                /* only xsum need */
1651                                netdev_warn(adapter->netdev,
1652                                            "IPV4 tso with zero data??\n");
1653                                goto check_sum;
1654                        } else {
1655                                ip_hdr(skb)->check = 0;
1656                                ip_hdr(skb)->tot_len = 0;
1657                                tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1658                                                        ip_hdr(skb)->saddr,
1659                                                        ip_hdr(skb)->daddr,
1660                                                        0, IPPROTO_TCP, 0);
1661                                tpd->word3 |= (ip_hdr(skb)->ihl &
1662                                        TDP_V4_IPHL_MASK) <<
1663                                        TPD_V4_IPHL_SHIFT;
1664                                tpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
1665                                        TPD_TCPHDRLEN_MASK) <<
1666                                        TPD_TCPHDRLEN_SHIFT;
1667                                tpd->word3 |= ((skb_shinfo(skb)->gso_size) &
1668                                        TPD_MSS_MASK) << TPD_MSS_SHIFT;
1669                                tpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
1670                        }
1671                        return 0;
1672                }
1673        }
1674
1675check_sum:
1676        if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1677                u8 css, cso;
1678
1679                cso = skb_checksum_start_offset(skb);
1680                if (unlikely(cso & 0x1)) {
1681                        netdev_err(adapter->netdev,
1682                                   "payload offset should not ant event number\n");
1683                        return -1;
1684                } else {
1685                        css = cso + skb->csum_offset;
1686                        tpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
1687                                        TPD_PLOADOFFSET_SHIFT;
1688                        tpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
1689                                        TPD_CCSUMOFFSET_SHIFT;
1690                        tpd->word3 |= 1 << TPD_CC_SEGMENT_EN_SHIFT;
1691                }
1692        }
1693
1694        return 0;
1695}
1696
1697static int atl1e_tx_map(struct atl1e_adapter *adapter,
1698                        struct sk_buff *skb, struct atl1e_tpd_desc *tpd)
1699{
1700        struct atl1e_tpd_desc *use_tpd = NULL;
1701        struct atl1e_tx_buffer *tx_buffer = NULL;
1702        u16 buf_len = skb_headlen(skb);
1703        u16 map_len = 0;
1704        u16 mapped_len = 0;
1705        u16 hdr_len = 0;
1706        u16 nr_frags;
1707        u16 f;
1708        int segment;
1709        int ring_start = adapter->tx_ring.next_to_use;
1710        int ring_end;
1711
1712        nr_frags = skb_shinfo(skb)->nr_frags;
1713        segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
1714        if (segment) {
1715                /* TSO */
1716                map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1717                use_tpd = tpd;
1718
1719                tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1720                tx_buffer->length = map_len;
1721                tx_buffer->dma = dma_map_single(&adapter->pdev->dev,
1722                                                skb->data, hdr_len,
1723                                                DMA_TO_DEVICE);
1724                if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma))
1725                        return -ENOSPC;
1726
1727                ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1728                mapped_len += map_len;
1729                use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1730                use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1731                        ((cpu_to_le32(tx_buffer->length) &
1732                        TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1733        }
1734
1735        while (mapped_len < buf_len) {
1736                /* mapped_len == 0, means we should use the first tpd,
1737                   which is given by caller  */
1738                if (mapped_len == 0) {
1739                        use_tpd = tpd;
1740                } else {
1741                        use_tpd = atl1e_get_tpd(adapter);
1742                        memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1743                }
1744                tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1745                tx_buffer->skb = NULL;
1746
1747                tx_buffer->length = map_len =
1748                        ((buf_len - mapped_len) >= MAX_TX_BUF_LEN) ?
1749                        MAX_TX_BUF_LEN : (buf_len - mapped_len);
1750                tx_buffer->dma =
1751                        dma_map_single(&adapter->pdev->dev,
1752                                       skb->data + mapped_len, map_len,
1753                                       DMA_TO_DEVICE);
1754
1755                if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1756                        /* We need to unwind the mappings we've done */
1757                        ring_end = adapter->tx_ring.next_to_use;
1758                        adapter->tx_ring.next_to_use = ring_start;
1759                        while (adapter->tx_ring.next_to_use != ring_end) {
1760                                tpd = atl1e_get_tpd(adapter);
1761                                tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1762                                dma_unmap_single(&adapter->pdev->dev,
1763                                                 tx_buffer->dma,
1764                                                 tx_buffer->length,
1765                                                 DMA_TO_DEVICE);
1766                        }
1767                        /* Reset the tx rings next pointer */
1768                        adapter->tx_ring.next_to_use = ring_start;
1769                        return -ENOSPC;
1770                }
1771
1772                ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_SINGLE);
1773                mapped_len  += map_len;
1774                use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1775                use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1776                        ((cpu_to_le32(tx_buffer->length) &
1777                        TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1778        }
1779
1780        for (f = 0; f < nr_frags; f++) {
1781                const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
1782                u16 i;
1783                u16 seg_num;
1784
1785                buf_len = skb_frag_size(frag);
1786
1787                seg_num = (buf_len + MAX_TX_BUF_LEN - 1) / MAX_TX_BUF_LEN;
1788                for (i = 0; i < seg_num; i++) {
1789                        use_tpd = atl1e_get_tpd(adapter);
1790                        memcpy(use_tpd, tpd, sizeof(struct atl1e_tpd_desc));
1791
1792                        tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);
1793                        BUG_ON(tx_buffer->skb);
1794
1795                        tx_buffer->skb = NULL;
1796                        tx_buffer->length =
1797                                (buf_len > MAX_TX_BUF_LEN) ?
1798                                MAX_TX_BUF_LEN : buf_len;
1799                        buf_len -= tx_buffer->length;
1800
1801                        tx_buffer->dma = skb_frag_dma_map(&adapter->pdev->dev,
1802                                                          frag,
1803                                                          (i * MAX_TX_BUF_LEN),
1804                                                          tx_buffer->length,
1805                                                          DMA_TO_DEVICE);
1806
1807                        if (dma_mapping_error(&adapter->pdev->dev, tx_buffer->dma)) {
1808                                /* We need to unwind the mappings we've done */
1809                                ring_end = adapter->tx_ring.next_to_use;
1810                                adapter->tx_ring.next_to_use = ring_start;
1811                                while (adapter->tx_ring.next_to_use != ring_end) {
1812                                        tpd = atl1e_get_tpd(adapter);
1813                                        tx_buffer = atl1e_get_tx_buffer(adapter, tpd);
1814                                        dma_unmap_page(&adapter->pdev->dev, tx_buffer->dma,
1815                                                       tx_buffer->length, DMA_TO_DEVICE);
1816                                }
1817
1818                                /* Reset the ring next to use pointer */
1819                                adapter->tx_ring.next_to_use = ring_start;
1820                                return -ENOSPC;
1821                        }
1822
1823                        ATL1E_SET_PCIMAP_TYPE(tx_buffer, ATL1E_TX_PCIMAP_PAGE);
1824                        use_tpd->buffer_addr = cpu_to_le64(tx_buffer->dma);
1825                        use_tpd->word2 = (use_tpd->word2 & (~TPD_BUFLEN_MASK)) |
1826                                        ((cpu_to_le32(tx_buffer->length) &
1827                                        TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT);
1828                }
1829        }
1830
1831        if ((tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK)
1832                /* note this one is a tcp header */
1833                tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
1834        /* The last tpd */
1835
1836        use_tpd->word3 |= 1 << TPD_EOP_SHIFT;
1837        /* The last buffer info contain the skb address,
1838           so it will be free after unmap */
1839        tx_buffer->skb = skb;
1840        return 0;
1841}
1842
1843static void atl1e_tx_queue(struct atl1e_adapter *adapter, u16 count,
1844                           struct atl1e_tpd_desc *tpd)
1845{
1846        struct atl1e_tx_ring *tx_ring = &adapter->tx_ring;
1847        /* Force memory writes to complete before letting h/w
1848         * know there are new descriptors to fetch.  (Only
1849         * applicable for weak-ordered memory model archs,
1850         * such as IA-64). */
1851        wmb();
1852        AT_WRITE_REG(&adapter->hw, REG_MB_TPD_PROD_IDX, tx_ring->next_to_use);
1853}
1854
1855static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb,
1856                                          struct net_device *netdev)
1857{
1858        struct atl1e_adapter *adapter = netdev_priv(netdev);
1859        u16 tpd_req = 1;
1860        struct atl1e_tpd_desc *tpd;
1861
1862        if (test_bit(__AT_DOWN, &adapter->flags)) {
1863                dev_kfree_skb_any(skb);
1864                return NETDEV_TX_OK;
1865        }
1866
1867        if (unlikely(skb->len <= 0)) {
1868                dev_kfree_skb_any(skb);
1869                return NETDEV_TX_OK;
1870        }
1871        tpd_req = atl1e_cal_tdp_req(skb);
1872
1873        if (atl1e_tpd_avail(adapter) < tpd_req) {
1874                /* no enough descriptor, just stop queue */
1875                netif_stop_queue(netdev);
1876                return NETDEV_TX_BUSY;
1877        }
1878
1879        tpd = atl1e_get_tpd(adapter);
1880
1881        if (skb_vlan_tag_present(skb)) {
1882                u16 vlan_tag = skb_vlan_tag_get(skb);
1883                u16 atl1e_vlan_tag;
1884
1885                tpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
1886                AT_VLAN_TAG_TO_TPD_TAG(vlan_tag, atl1e_vlan_tag);
1887                tpd->word2 |= (atl1e_vlan_tag & TPD_VLANTAG_MASK) <<
1888                                TPD_VLAN_SHIFT;
1889        }
1890
1891        if (skb->protocol == htons(ETH_P_8021Q))
1892                tpd->word3 |= 1 << TPD_VL_TAGGED_SHIFT;
1893
1894        if (skb_network_offset(skb) != ETH_HLEN)
1895                tpd->word3 |= 1 << TPD_ETHTYPE_SHIFT; /* 802.3 frame */
1896
1897        /* do TSO and check sum */
1898        if (atl1e_tso_csum(adapter, skb, tpd) != 0) {
1899                dev_kfree_skb_any(skb);
1900                return NETDEV_TX_OK;
1901        }
1902
1903        if (atl1e_tx_map(adapter, skb, tpd)) {
1904                dev_kfree_skb_any(skb);
1905                goto out;
1906        }
1907
1908        atl1e_tx_queue(adapter, tpd_req, tpd);
1909out:
1910        return NETDEV_TX_OK;
1911}
1912
1913static void atl1e_free_irq(struct atl1e_adapter *adapter)
1914{
1915        struct net_device *netdev = adapter->netdev;
1916
1917        free_irq(adapter->pdev->irq, netdev);
1918}
1919
1920static int atl1e_request_irq(struct atl1e_adapter *adapter)
1921{
1922        struct pci_dev    *pdev   = adapter->pdev;
1923        struct net_device *netdev = adapter->netdev;
1924        int err = 0;
1925
1926        err = request_irq(pdev->irq, atl1e_intr, IRQF_SHARED, netdev->name,
1927                          netdev);
1928        if (err) {
1929                netdev_dbg(adapter->netdev,
1930                           "Unable to allocate interrupt Error: %d\n", err);
1931                return err;
1932        }
1933        netdev_dbg(netdev, "atl1e_request_irq OK\n");
1934        return err;
1935}
1936
1937int atl1e_up(struct atl1e_adapter *adapter)
1938{
1939        struct net_device *netdev = adapter->netdev;
1940        int err = 0;
1941        u32 val;
1942
1943        /* hardware has been reset, we need to reload some things */
1944        err = atl1e_init_hw(&adapter->hw);
1945        if (err) {
1946                err = -EIO;
1947                return err;
1948        }
1949        atl1e_init_ring_ptrs(adapter);
1950        atl1e_set_multi(netdev);
1951        atl1e_restore_vlan(adapter);
1952
1953        if (atl1e_configure(adapter)) {
1954                err = -EIO;
1955                goto err_up;
1956        }
1957
1958        clear_bit(__AT_DOWN, &adapter->flags);
1959        napi_enable(&adapter->napi);
1960        atl1e_irq_enable(adapter);
1961        val = AT_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1962        AT_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
1963                      val | MASTER_CTRL_MANUAL_INT);
1964
1965err_up:
1966        return err;
1967}
1968
1969void atl1e_down(struct atl1e_adapter *adapter)
1970{
1971        struct net_device *netdev = adapter->netdev;
1972
1973        /* signal that we're down so the interrupt handler does not
1974         * reschedule our watchdog timer */
1975        set_bit(__AT_DOWN, &adapter->flags);
1976
1977        netif_stop_queue(netdev);
1978
1979        /* reset MAC to disable all RX/TX */
1980        atl1e_reset_hw(&adapter->hw);
1981        msleep(1);
1982
1983        napi_disable(&adapter->napi);
1984        atl1e_del_timer(adapter);
1985        atl1e_irq_disable(adapter);
1986
1987        netif_carrier_off(netdev);
1988        adapter->link_speed = SPEED_0;
1989        adapter->link_duplex = -1;
1990        atl1e_clean_tx_ring(adapter);
1991        atl1e_clean_rx_ring(adapter);
1992}
1993
1994/**
1995 * atl1e_open - Called when a network interface is made active
1996 * @netdev: network interface device structure
1997 *
1998 * Returns 0 on success, negative value on failure
1999 *
2000 * The open entry point is called when a network interface is made
2001 * active by the system (IFF_UP).  At this point all resources needed
2002 * for transmit and receive operations are allocated, the interrupt
2003 * handler is registered with the OS, the watchdog timer is started,
2004 * and the stack is notified that the interface is ready.
2005 */
2006static int atl1e_open(struct net_device *netdev)
2007{
2008        struct atl1e_adapter *adapter = netdev_priv(netdev);
2009        int err;
2010
2011        /* disallow open during test */
2012        if (test_bit(__AT_TESTING, &adapter->flags))
2013                return -EBUSY;
2014
2015        /* allocate rx/tx dma buffer & descriptors */
2016        atl1e_init_ring_resources(adapter);
2017        err = atl1e_setup_ring_resources(adapter);
2018        if (unlikely(err))
2019                return err;
2020
2021        err = atl1e_request_irq(adapter);
2022        if (unlikely(err))
2023                goto err_req_irq;
2024
2025        err = atl1e_up(adapter);
2026        if (unlikely(err))
2027                goto err_up;
2028
2029        return 0;
2030
2031err_up:
2032        atl1e_free_irq(adapter);
2033err_req_irq:
2034        atl1e_free_ring_resources(adapter);
2035        atl1e_reset_hw(&adapter->hw);
2036
2037        return err;
2038}
2039
2040/**
2041 * atl1e_close - Disables a network interface
2042 * @netdev: network interface device structure
2043 *
2044 * Returns 0, this is not allowed to fail
2045 *
2046 * The close entry point is called when an interface is de-activated
2047 * by the OS.  The hardware is still under the drivers control, but
2048 * needs to be disabled.  A global MAC reset is issued to stop the
2049 * hardware, and all transmit and receive resources are freed.
2050 */
2051static int atl1e_close(struct net_device *netdev)
2052{
2053        struct atl1e_adapter *adapter = netdev_priv(netdev);
2054
2055        WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2056        atl1e_down(adapter);
2057        atl1e_free_irq(adapter);
2058        atl1e_free_ring_resources(adapter);
2059
2060        return 0;
2061}
2062
2063static int atl1e_suspend(struct pci_dev *pdev, pm_message_t state)
2064{
2065        struct net_device *netdev = pci_get_drvdata(pdev);
2066        struct atl1e_adapter *adapter = netdev_priv(netdev);
2067        struct atl1e_hw *hw = &adapter->hw;
2068        u32 ctrl = 0;
2069        u32 mac_ctrl_data = 0;
2070        u32 wol_ctrl_data = 0;
2071        u16 mii_advertise_data = 0;
2072        u16 mii_bmsr_data = 0;
2073        u16 mii_intr_status_data = 0;
2074        u32 wufc = adapter->wol;
2075        u32 i;
2076#ifdef CONFIG_PM
2077        int retval = 0;
2078#endif
2079
2080        if (netif_running(netdev)) {
2081                WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2082                atl1e_down(adapter);
2083        }
2084        netif_device_detach(netdev);
2085
2086#ifdef CONFIG_PM
2087        retval = pci_save_state(pdev);
2088        if (retval)
2089                return retval;
2090#endif
2091
2092        if (wufc) {
2093                /* get link status */
2094                atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2095                atl1e_read_phy_reg(hw, MII_BMSR, &mii_bmsr_data);
2096
2097                mii_advertise_data = ADVERTISE_10HALF;
2098
2099                if ((atl1e_write_phy_reg(hw, MII_CTRL1000, 0) != 0) ||
2100                    (atl1e_write_phy_reg(hw,
2101                           MII_ADVERTISE, mii_advertise_data) != 0) ||
2102                    (atl1e_phy_commit(hw)) != 0) {
2103                        netdev_dbg(adapter->netdev, "set phy register failed\n");
2104                        goto wol_dis;
2105                }
2106
2107                hw->phy_configured = false; /* re-init PHY when resume */
2108
2109                /* turn on magic packet wol */
2110                if (wufc & AT_WUFC_MAG)
2111                        wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2112
2113                if (wufc & AT_WUFC_LNKC) {
2114                /* if orignal link status is link, just wait for retrive link */
2115                        if (mii_bmsr_data & BMSR_LSTATUS) {
2116                                for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2117                                        msleep(100);
2118                                        atl1e_read_phy_reg(hw, MII_BMSR,
2119                                                        &mii_bmsr_data);
2120                                        if (mii_bmsr_data & BMSR_LSTATUS)
2121                                                break;
2122                                }
2123
2124                                if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2125                                        netdev_dbg(adapter->netdev,
2126                                                   "Link may change when suspend\n");
2127                        }
2128                        wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2129                        /* only link up can wake up */
2130                        if (atl1e_write_phy_reg(hw, MII_INT_CTRL, 0x400) != 0) {
2131                                netdev_dbg(adapter->netdev,
2132                                           "read write phy register failed\n");
2133                                goto wol_dis;
2134                        }
2135                }
2136                /* clear phy interrupt */
2137                atl1e_read_phy_reg(hw, MII_INT_STATUS, &mii_intr_status_data);
2138                /* Config MAC Ctrl register */
2139                mac_ctrl_data = MAC_CTRL_RX_EN;
2140                /* set to 10/100M halt duplex */
2141                mac_ctrl_data |= MAC_CTRL_SPEED_10_100 << MAC_CTRL_SPEED_SHIFT;
2142                mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2143                                 MAC_CTRL_PRMLEN_MASK) <<
2144                                 MAC_CTRL_PRMLEN_SHIFT);
2145
2146                __atl1e_vlan_mode(netdev->features, &mac_ctrl_data);
2147
2148                /* magic packet maybe Broadcast&multicast&Unicast frame */
2149                if (wufc & AT_WUFC_MAG)
2150                        mac_ctrl_data |= MAC_CTRL_BC_EN;
2151
2152                netdev_dbg(adapter->netdev, "suspend MAC=0x%x\n",
2153                           mac_ctrl_data);
2154
2155                AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2156                AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2157                /* pcie patch */
2158                ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2159                ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2160                AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2161                pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2162                goto suspend_exit;
2163        }
2164wol_dis:
2165
2166        /* WOL disabled */
2167        AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2168
2169        /* pcie patch */
2170        ctrl = AT_READ_REG(hw, REG_PCIE_PHYMISC);
2171        ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2172        AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2173
2174        atl1e_force_ps(hw);
2175        hw->phy_configured = false; /* re-init PHY when resume */
2176
2177        pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2178
2179suspend_exit:
2180
2181        if (netif_running(netdev))
2182                atl1e_free_irq(adapter);
2183
2184        pci_disable_device(pdev);
2185
2186        pci_set_power_state(pdev, pci_choose_state(pdev, state));
2187
2188        return 0;
2189}
2190
2191#ifdef CONFIG_PM
2192static int atl1e_resume(struct pci_dev *pdev)
2193{
2194        struct net_device *netdev = pci_get_drvdata(pdev);
2195        struct atl1e_adapter *adapter = netdev_priv(netdev);
2196        u32 err;
2197
2198        pci_set_power_state(pdev, PCI_D0);
2199        pci_restore_state(pdev);
2200
2201        err = pci_enable_device(pdev);
2202        if (err) {
2203                netdev_err(adapter->netdev,
2204                           "Cannot enable PCI device from suspend\n");
2205                return err;
2206        }
2207
2208        pci_set_master(pdev);
2209
2210        AT_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
2211
2212        pci_enable_wake(pdev, PCI_D3hot, 0);
2213        pci_enable_wake(pdev, PCI_D3cold, 0);
2214
2215        AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2216
2217        if (netif_running(netdev)) {
2218                err = atl1e_request_irq(adapter);
2219                if (err)
2220                        return err;
2221        }
2222
2223        atl1e_reset_hw(&adapter->hw);
2224
2225        if (netif_running(netdev))
2226                atl1e_up(adapter);
2227
2228        netif_device_attach(netdev);
2229
2230        return 0;
2231}
2232#endif
2233
2234static void atl1e_shutdown(struct pci_dev *pdev)
2235{
2236        atl1e_suspend(pdev, PMSG_SUSPEND);
2237}
2238
2239static const struct net_device_ops atl1e_netdev_ops = {
2240        .ndo_open               = atl1e_open,
2241        .ndo_stop               = atl1e_close,
2242        .ndo_start_xmit         = atl1e_xmit_frame,
2243        .ndo_get_stats          = atl1e_get_stats,
2244        .ndo_set_rx_mode        = atl1e_set_multi,
2245        .ndo_validate_addr      = eth_validate_addr,
2246        .ndo_set_mac_address    = atl1e_set_mac_addr,
2247        .ndo_fix_features       = atl1e_fix_features,
2248        .ndo_set_features       = atl1e_set_features,
2249        .ndo_change_mtu         = atl1e_change_mtu,
2250        .ndo_eth_ioctl          = atl1e_ioctl,
2251        .ndo_tx_timeout         = atl1e_tx_timeout,
2252#ifdef CONFIG_NET_POLL_CONTROLLER
2253        .ndo_poll_controller    = atl1e_netpoll,
2254#endif
2255
2256};
2257
2258static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2259{
2260        SET_NETDEV_DEV(netdev, &pdev->dev);
2261        pci_set_drvdata(pdev, netdev);
2262
2263        netdev->netdev_ops = &atl1e_netdev_ops;
2264
2265        netdev->watchdog_timeo = AT_TX_WATCHDOG;
2266        /* MTU range: 42 - 8170 */
2267        netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2268        netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
2269                          (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2270        atl1e_set_ethtool_ops(netdev);
2271
2272        netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |
2273                              NETIF_F_HW_VLAN_CTAG_RX;
2274        netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_TX;
2275        /* not enabled by default */
2276        netdev->hw_features |= NETIF_F_RXALL | NETIF_F_RXFCS;
2277        return 0;
2278}
2279
2280/**
2281 * atl1e_probe - Device Initialization Routine
2282 * @pdev: PCI device information struct
2283 * @ent: entry in atl1e_pci_tbl
2284 *
2285 * Returns 0 on success, negative on failure
2286 *
2287 * atl1e_probe initializes an adapter identified by a pci_dev structure.
2288 * The OS initialization, configuring of the adapter private structure,
2289 * and a hardware reset occur.
2290 */
2291static int atl1e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2292{
2293        struct net_device *netdev;
2294        struct atl1e_adapter *adapter = NULL;
2295        static int cards_found;
2296
2297        int err = 0;
2298
2299        err = pci_enable_device(pdev);
2300        if (err)
2301                return dev_err_probe(&pdev->dev, err, "cannot enable PCI device\n");
2302
2303        /*
2304         * The atl1e chip can DMA to 64-bit addresses, but it uses a single
2305         * shared register for the high 32 bits, so only a single, aligned,
2306         * 4 GB physical address range can be used at a time.
2307         *
2308         * Supporting 64-bit DMA on this hardware is more trouble than it's
2309         * worth.  It is far easier to limit to 32-bit DMA than update
2310         * various kernel subsystems to support the mechanics required by a
2311         * fixed-high-32-bit system.
2312         */
2313        err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2314        if (err) {
2315                dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2316                goto err_dma;
2317        }
2318
2319        err = pci_request_regions(pdev, atl1e_driver_name);
2320        if (err) {
2321                dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2322                goto err_pci_reg;
2323        }
2324
2325        pci_set_master(pdev);
2326
2327        netdev = alloc_etherdev(sizeof(struct atl1e_adapter));
2328        if (netdev == NULL) {
2329                err = -ENOMEM;
2330                goto err_alloc_etherdev;
2331        }
2332
2333        err = atl1e_init_netdev(netdev, pdev);
2334        if (err) {
2335                netdev_err(netdev, "init netdevice failed\n");
2336                goto err_init_netdev;
2337        }
2338        adapter = netdev_priv(netdev);
2339        adapter->bd_number = cards_found;
2340        adapter->netdev = netdev;
2341        adapter->pdev = pdev;
2342        adapter->hw.adapter = adapter;
2343        adapter->hw.hw_addr = pci_iomap(pdev, BAR_0, 0);
2344        if (!adapter->hw.hw_addr) {
2345                err = -EIO;
2346                netdev_err(netdev, "cannot map device registers\n");
2347                goto err_ioremap;
2348        }
2349
2350        /* init mii data */
2351        adapter->mii.dev = netdev;
2352        adapter->mii.mdio_read  = atl1e_mdio_read;
2353        adapter->mii.mdio_write = atl1e_mdio_write;
2354        adapter->mii.phy_id_mask = 0x1f;
2355        adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2356
2357        netif_napi_add(netdev, &adapter->napi, atl1e_clean, 64);
2358
2359        timer_setup(&adapter->phy_config_timer, atl1e_phy_config, 0);
2360
2361        /* get user settings */
2362        atl1e_check_options(adapter);
2363        /*
2364         * Mark all PCI regions associated with PCI device
2365         * pdev as being reserved by owner atl1e_driver_name
2366         * Enables bus-mastering on the device and calls
2367         * pcibios_set_master to do the needed arch specific settings
2368         */
2369        atl1e_setup_pcicmd(pdev);
2370        /* setup the private structure */
2371        err = atl1e_sw_init(adapter);
2372        if (err) {
2373                netdev_err(netdev, "net device private data init failed\n");
2374                goto err_sw_init;
2375        }
2376
2377        /* Init GPHY as early as possible due to power saving issue  */
2378        atl1e_phy_init(&adapter->hw);
2379        /* reset the controller to
2380         * put the device in a known good starting state */
2381        err = atl1e_reset_hw(&adapter->hw);
2382        if (err) {
2383                err = -EIO;
2384                goto err_reset;
2385        }
2386
2387        if (atl1e_read_mac_addr(&adapter->hw) != 0) {
2388                err = -EIO;
2389                netdev_err(netdev, "get mac address failed\n");
2390                goto err_eeprom;
2391        }
2392
2393        eth_hw_addr_set(netdev, adapter->hw.mac_addr);
2394        netdev_dbg(netdev, "mac address : %pM\n", adapter->hw.mac_addr);
2395
2396        INIT_WORK(&adapter->reset_task, atl1e_reset_task);
2397        INIT_WORK(&adapter->link_chg_task, atl1e_link_chg_task);
2398        netif_set_gso_max_size(netdev, MAX_TSO_SEG_SIZE);
2399        err = register_netdev(netdev);
2400        if (err) {
2401                netdev_err(netdev, "register netdevice failed\n");
2402                goto err_register;
2403        }
2404
2405        /* assume we have no link for now */
2406        netif_stop_queue(netdev);
2407        netif_carrier_off(netdev);
2408
2409        cards_found++;
2410
2411        return 0;
2412
2413err_reset:
2414err_register:
2415err_sw_init:
2416err_eeprom:
2417        pci_iounmap(pdev, adapter->hw.hw_addr);
2418err_init_netdev:
2419err_ioremap:
2420        free_netdev(netdev);
2421err_alloc_etherdev:
2422        pci_release_regions(pdev);
2423err_pci_reg:
2424err_dma:
2425        pci_disable_device(pdev);
2426        return err;
2427}
2428
2429/**
2430 * atl1e_remove - Device Removal Routine
2431 * @pdev: PCI device information struct
2432 *
2433 * atl1e_remove is called by the PCI subsystem to alert the driver
2434 * that it should release a PCI device.  The could be caused by a
2435 * Hot-Plug event, or because the driver is going to be removed from
2436 * memory.
2437 */
2438static void atl1e_remove(struct pci_dev *pdev)
2439{
2440        struct net_device *netdev = pci_get_drvdata(pdev);
2441        struct atl1e_adapter *adapter = netdev_priv(netdev);
2442
2443        /*
2444         * flush_scheduled work may reschedule our watchdog task, so
2445         * explicitly disable watchdog tasks from being rescheduled
2446         */
2447        set_bit(__AT_DOWN, &adapter->flags);
2448
2449        atl1e_del_timer(adapter);
2450        atl1e_cancel_work(adapter);
2451
2452        unregister_netdev(netdev);
2453        atl1e_free_ring_resources(adapter);
2454        atl1e_force_ps(&adapter->hw);
2455        pci_iounmap(pdev, adapter->hw.hw_addr);
2456        pci_release_regions(pdev);
2457        free_netdev(netdev);
2458        pci_disable_device(pdev);
2459}
2460
2461/**
2462 * atl1e_io_error_detected - called when PCI error is detected
2463 * @pdev: Pointer to PCI device
2464 * @state: The current pci connection state
2465 *
2466 * This function is called after a PCI bus error affecting
2467 * this device has been detected.
2468 */
2469static pci_ers_result_t
2470atl1e_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2471{
2472        struct net_device *netdev = pci_get_drvdata(pdev);
2473        struct atl1e_adapter *adapter = netdev_priv(netdev);
2474
2475        netif_device_detach(netdev);
2476
2477        if (state == pci_channel_io_perm_failure)
2478                return PCI_ERS_RESULT_DISCONNECT;
2479
2480        if (netif_running(netdev))
2481                atl1e_down(adapter);
2482
2483        pci_disable_device(pdev);
2484
2485        /* Request a slot slot reset. */
2486        return PCI_ERS_RESULT_NEED_RESET;
2487}
2488
2489/**
2490 * atl1e_io_slot_reset - called after the pci bus has been reset.
2491 * @pdev: Pointer to PCI device
2492 *
2493 * Restart the card from scratch, as if from a cold-boot. Implementation
2494 * resembles the first-half of the e1000_resume routine.
2495 */
2496static pci_ers_result_t atl1e_io_slot_reset(struct pci_dev *pdev)
2497{
2498        struct net_device *netdev = pci_get_drvdata(pdev);
2499        struct atl1e_adapter *adapter = netdev_priv(netdev);
2500
2501        if (pci_enable_device(pdev)) {
2502                netdev_err(adapter->netdev,
2503                           "Cannot re-enable PCI device after reset\n");
2504                return PCI_ERS_RESULT_DISCONNECT;
2505        }
2506        pci_set_master(pdev);
2507
2508        pci_enable_wake(pdev, PCI_D3hot, 0);
2509        pci_enable_wake(pdev, PCI_D3cold, 0);
2510
2511        atl1e_reset_hw(&adapter->hw);
2512
2513        return PCI_ERS_RESULT_RECOVERED;
2514}
2515
2516/**
2517 * atl1e_io_resume - called when traffic can start flowing again.
2518 * @pdev: Pointer to PCI device
2519 *
2520 * This callback is called when the error recovery driver tells us that
2521 * its OK to resume normal operation. Implementation resembles the
2522 * second-half of the atl1e_resume routine.
2523 */
2524static void atl1e_io_resume(struct pci_dev *pdev)
2525{
2526        struct net_device *netdev = pci_get_drvdata(pdev);
2527        struct atl1e_adapter *adapter = netdev_priv(netdev);
2528
2529        if (netif_running(netdev)) {
2530                if (atl1e_up(adapter)) {
2531                        netdev_err(adapter->netdev,
2532                                   "can't bring device back up after reset\n");
2533                        return;
2534                }
2535        }
2536
2537        netif_device_attach(netdev);
2538}
2539
2540static const struct pci_error_handlers atl1e_err_handler = {
2541        .error_detected = atl1e_io_error_detected,
2542        .slot_reset = atl1e_io_slot_reset,
2543        .resume = atl1e_io_resume,
2544};
2545
2546static struct pci_driver atl1e_driver = {
2547        .name     = atl1e_driver_name,
2548        .id_table = atl1e_pci_tbl,
2549        .probe    = atl1e_probe,
2550        .remove   = atl1e_remove,
2551        /* Power Management Hooks */
2552#ifdef CONFIG_PM
2553        .suspend  = atl1e_suspend,
2554        .resume   = atl1e_resume,
2555#endif
2556        .shutdown = atl1e_shutdown,
2557        .err_handler = &atl1e_err_handler
2558};
2559
2560module_pci_driver(atl1e_driver);
2561