drivers/net/atl1c/atl1c_main.c

   1 /*
   2  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1c.h"
  23
  24 #define ATL1C_DRV_VERSION "1.0.0.2-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27 #define PCI_DEVICE_ID_ATTANSIC_L2C      0x1062
  28 #define PCI_DEVICE_ID_ATTANSIC_L1C      0x1063
  29 #define PCI_DEVICE_ID_ATHEROS_L2C_B     0x2060 /* AR8152 v1.1 Fast 10/100 */
  30 #define PCI_DEVICE_ID_ATHEROS_L2C_B2    0x2062 /* AR8152 v2.0 Fast 10/100 */
  31 #define PCI_DEVICE_ID_ATHEROS_L1D       0x1073 /* AR8151 v1.0 Gigabit 1000 */
  32
  33 #define L2CB_V10                        0xc0
  34 #define L2CB_V11                        0xc1
  35
  36 /*
  37  * atl1c_pci_tbl - PCI Device ID Table
  38  *
  39  * Wildcard entries (PCI_ANY_ID) should come last
  40  * Last entry must be all 0s
  41  *
  42  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  43  *   Class, Class Mask, private data (not used) }
  44  */
  45 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = {
  46         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  47         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  48         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  49         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  50         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  51         /* required last entry */
  52         { 0 }
  53 };
  54 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  55
  56 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
  57 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  58 MODULE_LICENSE("GPL");
  59 MODULE_VERSION(ATL1C_DRV_VERSION);
  60
  61 static int atl1c_stop_mac(struct atl1c_hw *hw);
  62 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
  63 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
  64 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  65 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
  66 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
  67 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
  68                    int *work_done, int work_to_do);
  69
  70 static const u16 atl1c_pay_load_size[] = {
  71         128, 256, 512, 1024, 2048, 4096,
  72 };
  73
  74 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
  75 {
  76         REG_MB_RFD0_PROD_IDX,
  77         REG_MB_RFD1_PROD_IDX,
  78         REG_MB_RFD2_PROD_IDX,
  79         REG_MB_RFD3_PROD_IDX
  80 };
  81
  82 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  83 {
  84         REG_RFD0_HEAD_ADDR_LO,
  85         REG_RFD1_HEAD_ADDR_LO,
  86         REG_RFD2_HEAD_ADDR_LO,
  87         REG_RFD3_HEAD_ADDR_LO
  88 };
  89
  90 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  91 {
  92         REG_RRD0_HEAD_ADDR_LO,
  93         REG_RRD1_HEAD_ADDR_LO,
  94         REG_RRD2_HEAD_ADDR_LO,
  95         REG_RRD3_HEAD_ADDR_LO
  96 };
  97
  98 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  99         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
 100
 101 /*
 102  * atl1c_init_pcie - init PCIE module
 103  */
 104 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 105 {
 106         u32 data;
 107         u32 pci_cmd;
 108         struct pci_dev *pdev = hw->adapter->pdev;
 109
 110         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 111         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 112         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 113                 PCI_COMMAND_IO);
 114         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 115
 116         /*
 117          * Clear any PowerSaveing Settings
 118          */
 119         pci_enable_wake(pdev, PCI_D3hot, 0);
 120         pci_enable_wake(pdev, PCI_D3cold, 0);
 121
 122         /*
 123          * Mask some pcie error bits
 124          */
 125         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
 126         data &= ~PCIE_UC_SERVRITY_DLP;
 127         data &= ~PCIE_UC_SERVRITY_FCP;
 128         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
 129
 130         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 131                 atl1c_disable_l0s_l1(hw);
 132         if (flag & ATL1C_PCIE_PHY_RESET)
 133                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 134         else
 135                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 136                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 137
 138         msleep(1);
 139 }
 140
 141 /*
 142  * atl1c_irq_enable - Enable default interrupt generation settings
 143  * @adapter: board private structure
 144  */
 145 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 146 {
 147         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 148                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 149                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 150                 AT_WRITE_FLUSH(&adapter->hw);
 151         }
 152 }
 153
 154 /*
 155  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 156  * @adapter: board private structure
 157  */
 158 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 159 {
 160         atomic_inc(&adapter->irq_sem);
 161         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 162         AT_WRITE_FLUSH(&adapter->hw);
 163         synchronize_irq(adapter->pdev->irq);
 164 }
 165
 166 /*
 167  * atl1c_irq_reset - reset interrupt confiure on the NIC
 168  * @adapter: board private structure
 169  */
 170 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 171 {
 172         atomic_set(&adapter->irq_sem, 1);
 173         atl1c_irq_enable(adapter);
 174 }
 175
 176 /*
 177  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 178  * of the idle status register until the device is actually idle
 179  */
 180 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
 181 {
 182         int timeout;
 183         u32 data;
 184
 185         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 186                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 187                 if ((data & IDLE_STATUS_MASK) == 0)
 188                         return 0;
 189                 msleep(1);
 190         }
 191         return data;
 192 }
 193
 194 /*
 195  * atl1c_phy_config - Timer Call-back
 196  * @data: pointer to netdev cast into an unsigned long
 197  */
 198 static void atl1c_phy_config(unsigned long data)
 199 {
 200         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 201         struct atl1c_hw *hw = &adapter->hw;
 202         unsigned long flags;
 203
 204         spin_lock_irqsave(&adapter->mdio_lock, flags);
 205         atl1c_restart_autoneg(hw);
 206         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 207 }
 208
 209 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 210 {
 211         WARN_ON(in_interrupt());
 212         atl1c_down(adapter);
 213         atl1c_up(adapter);
 214         clear_bit(__AT_RESETTING, &adapter->flags);
 215 }
 216
 217 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 218 {
 219         struct atl1c_hw *hw = &adapter->hw;
 220         struct net_device *netdev = adapter->netdev;
 221         struct pci_dev    *pdev   = adapter->pdev;
 222         int err;
 223         unsigned long flags;
 224         u16 speed, duplex, phy_data;
 225
 226         spin_lock_irqsave(&adapter->mdio_lock, flags);
 227         /* MII_BMSR must read twise */
 228         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 229         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 230         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 231
 232         if ((phy_data & BMSR_LSTATUS) == 0) {
 233                 /* link down */
 234                 if (netif_carrier_ok(netdev)) {
 235                         hw->hibernate = true;
 236                         if (atl1c_stop_mac(hw) != 0)
 237                                 if (netif_msg_hw(adapter))
 238                                         dev_warn(&pdev->dev,
 239                                                 "stop mac failed\n");
 240                         atl1c_set_aspm(hw, false);
 241                 }
 242                 netif_carrier_off(netdev);
 243         } else {
 244                 /* Link Up */
 245                 hw->hibernate = false;
 246                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 247                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 248                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 249                 if (unlikely(err))
 250                         return;
 251                 /* link result is our setting */
 252                 if (adapter->link_speed != speed ||
 253                     adapter->link_duplex != duplex) {
 254                         adapter->link_speed  = speed;
 255                         adapter->link_duplex = duplex;
 256                         atl1c_set_aspm(hw, true);
 257                         atl1c_enable_tx_ctrl(hw);
 258                         atl1c_enable_rx_ctrl(hw);
 259                         atl1c_setup_mac_ctrl(adapter);
 260                         if (netif_msg_link(adapter))
 261                                 dev_info(&pdev->dev,
 262                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 263                                         atl1c_driver_name, netdev->name,
 264                                         adapter->link_speed,
 265                                         adapter->link_duplex == FULL_DUPLEX ?
 266                                         "Full Duplex" : "Half Duplex");
 267                 }
 268                 if (!netif_carrier_ok(netdev))
 269                         netif_carrier_on(netdev);
 270         }
 271 }
 272
 273 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 274 {
 275         struct net_device *netdev = adapter->netdev;
 276         struct pci_dev    *pdev   = adapter->pdev;
 277         u16 phy_data;
 278         u16 link_up;
 279
 280         spin_lock(&adapter->mdio_lock);
 281         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 282         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 283         spin_unlock(&adapter->mdio_lock);
 284         link_up = phy_data & BMSR_LSTATUS;
 285         /* notify upper layer link down ASAP */
 286         if (!link_up) {
 287                 if (netif_carrier_ok(netdev)) {
 288                         /* old link state: Up */
 289                         netif_carrier_off(netdev);
 290                         if (netif_msg_link(adapter))
 291                                 dev_info(&pdev->dev,
 292                                         "%s: %s NIC Link is Down\n",
 293                                         atl1c_driver_name, netdev->name);
 294                         adapter->link_speed = SPEED_0;
 295                 }
 296         }
 297
 298         adapter->work_event |= ATL1C_WORK_EVENT_LINK_CHANGE;
 299         schedule_work(&adapter->common_task);
 300 }
 301
 302 static void atl1c_common_task(struct work_struct *work)
 303 {
 304         struct atl1c_adapter *adapter;
 305         struct net_device *netdev;
 306
 307         adapter = container_of(work, struct atl1c_adapter, common_task);
 308         netdev = adapter->netdev;
 309
 310         if (adapter->work_event & ATL1C_WORK_EVENT_RESET) {
 311                 netif_device_detach(netdev);
 312                 atl1c_down(adapter);
 313                 atl1c_up(adapter);
 314                 netif_device_attach(netdev);
 315                 return;
 316         }
 317
 318         if (adapter->work_event & ATL1C_WORK_EVENT_LINK_CHANGE)
 319                 atl1c_check_link_status(adapter);
 320
 321         return;
 322 }
 323
 324
 325 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 326 {
 327         del_timer_sync(&adapter->phy_config_timer);
 328 }
 329
 330
 331 /*
 332  * atl1c_tx_timeout - Respond to a Tx Hang
 333  * @netdev: network interface device structure
 334  */
 335 static void atl1c_tx_timeout(struct net_device *netdev)
 336 {
 337         struct atl1c_adapter *adapter = netdev_priv(netdev);
 338
 339         /* Do the reset outside of interrupt context */
 340         adapter->work_event |= ATL1C_WORK_EVENT_RESET;
 341         schedule_work(&adapter->common_task);
 342 }
 343
 344 /*
 345  * atl1c_set_multi - Multicast and Promiscuous mode set
 346  * @netdev: network interface device structure
 347  *
 348  * The set_multi entry point is called whenever the multicast address
 349  * list or the network interface flags are updated.  This routine is
 350  * responsible for configuring the hardware for proper multicast,
 351  * promiscuous mode, and all-multi behavior.
 352  */
 353 static void atl1c_set_multi(struct net_device *netdev)
 354 {
 355         struct atl1c_adapter *adapter = netdev_priv(netdev);
 356         struct atl1c_hw *hw = &adapter->hw;
 357         struct netdev_hw_addr *ha;
 358         u32 mac_ctrl_data;
 359         u32 hash_value;
 360
 361         /* Check for Promiscuous and All Multicast modes */
 362         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 363
 364         if (netdev->flags & IFF_PROMISC) {
 365                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 366         } else if (netdev->flags & IFF_ALLMULTI) {
 367                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 368                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 369         } else {
 370                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 371         }
 372
 373         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 374
 375         /* clear the old settings from the multicast hash table */
 376         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 377         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 378
 379         /* comoute mc addresses' hash value ,and put it into hash table */
 380         netdev_for_each_mc_addr(ha, netdev) {
 381                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 382                 atl1c_hash_set(hw, hash_value);
 383         }
 384 }
 385
 386 static void atl1c_vlan_rx_register(struct net_device *netdev,
 387                                    struct vlan_group *grp)
 388 {
 389         struct atl1c_adapter *adapter = netdev_priv(netdev);
 390         struct pci_dev *pdev = adapter->pdev;
 391         u32 mac_ctrl_data = 0;
 392
 393         if (netif_msg_pktdata(adapter))
 394                 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
 395
 396         atl1c_irq_disable(adapter);
 397
 398         adapter->vlgrp = grp;
 399         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 400
 401         if (grp) {
 402                 /* enable VLAN tag insert/strip */
 403                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 404         } else {
 405                 /* disable VLAN tag insert/strip */
 406                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 407         }
 408
 409         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 410         atl1c_irq_enable(adapter);
 411 }
 412
 413 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 414 {
 415         struct pci_dev *pdev = adapter->pdev;
 416
 417         if (netif_msg_pktdata(adapter))
 418                 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
 419         atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 420 }
 421 /*
 422  * atl1c_set_mac - Change the Ethernet Address of the NIC
 423  * @netdev: network interface device structure
 424  * @p: pointer to an address structure
 425  *
 426  * Returns 0 on success, negative on failure
 427  */
 428 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 429 {
 430         struct atl1c_adapter *adapter = netdev_priv(netdev);
 431         struct sockaddr *addr = p;
 432
 433         if (!is_valid_ether_addr(addr->sa_data))
 434                 return -EADDRNOTAVAIL;
 435
 436         if (netif_running(netdev))
 437                 return -EBUSY;
 438
 439         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 440         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 441
 442         atl1c_hw_set_mac_addr(&adapter->hw);
 443
 444         return 0;
 445 }
 446
 447 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 448                                 struct net_device *dev)
 449 {
 450         int mtu = dev->mtu;
 451
 452         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 453                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 454 }
 455 /*
 456  * atl1c_change_mtu - Change the Maximum Transfer Unit
 457  * @netdev: network interface device structure
 458  * @new_mtu: new value for maximum frame size
 459  *
 460  * Returns 0 on success, negative on failure
 461  */
 462 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 463 {
 464         struct atl1c_adapter *adapter = netdev_priv(netdev);
 465         int old_mtu   = netdev->mtu;
 466         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 467
 468         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 469                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 470                 if (netif_msg_link(adapter))
 471                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 472                 return -EINVAL;
 473         }
 474         /* set MTU */
 475         if (old_mtu != new_mtu && netif_running(netdev)) {
 476                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 477                         msleep(1);
 478                 netdev->mtu = new_mtu;
 479                 adapter->hw.max_frame_size = new_mtu;
 480                 atl1c_set_rxbufsize(adapter, netdev);
 481                 atl1c_down(adapter);
 482                 atl1c_up(adapter);
 483                 clear_bit(__AT_RESETTING, &adapter->flags);
 484                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 485                         u32 phy_data;
 486
 487                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 488                         phy_data |= 0x10000000;
 489                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 490                 }
 491
 492         }
 493         return 0;
 494 }
 495
 496 /*
 497  *  caller should hold mdio_lock
 498  */
 499 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 500 {
 501         struct atl1c_adapter *adapter = netdev_priv(netdev);
 502         u16 result;
 503
 504         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 505         return result;
 506 }
 507
 508 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 509                              int reg_num, int val)
 510 {
 511         struct atl1c_adapter *adapter = netdev_priv(netdev);
 512
 513         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 514 }
 515
 516 /*
 517  * atl1c_mii_ioctl -
 518  * @netdev:
 519  * @ifreq:
 520  * @cmd:
 521  */
 522 static int atl1c_mii_ioctl(struct net_device *netdev,
 523                            struct ifreq *ifr, int cmd)
 524 {
 525         struct atl1c_adapter *adapter = netdev_priv(netdev);
 526         struct pci_dev *pdev = adapter->pdev;
 527         struct mii_ioctl_data *data = if_mii(ifr);
 528         unsigned long flags;
 529         int retval = 0;
 530
 531         if (!netif_running(netdev))
 532                 return -EINVAL;
 533
 534         spin_lock_irqsave(&adapter->mdio_lock, flags);
 535         switch (cmd) {
 536         case SIOCGMIIPHY:
 537                 data->phy_id = 0;
 538                 break;
 539
 540         case SIOCGMIIREG:
 541                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 542                                     &data->val_out)) {
 543                         retval = -EIO;
 544                         goto out;
 545                 }
 546                 break;
 547
 548         case SIOCSMIIREG:
 549                 if (data->reg_num & ~(0x1F)) {
 550                         retval = -EFAULT;
 551                         goto out;
 552                 }
 553
 554                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 555                                 data->reg_num, data->val_in);
 556                 if (atl1c_write_phy_reg(&adapter->hw,
 557                                      data->reg_num, data->val_in)) {
 558                         retval = -EIO;
 559                         goto out;
 560                 }
 561                 break;
 562
 563         default:
 564                 retval = -EOPNOTSUPP;
 565                 break;
 566         }
 567 out:
 568         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 569         return retval;
 570 }
 571
 572 /*
 573  * atl1c_ioctl -
 574  * @netdev:
 575  * @ifreq:
 576  * @cmd:
 577  */
 578 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 579 {
 580         switch (cmd) {
 581         case SIOCGMIIPHY:
 582         case SIOCGMIIREG:
 583         case SIOCSMIIREG:
 584                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 585         default:
 586                 return -EOPNOTSUPP;
 587         }
 588 }
 589
 590 /*
 591  * atl1c_alloc_queues - Allocate memory for all rings
 592  * @adapter: board private structure to initialize
 593  *
 594  */
 595 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 596 {
 597         return 0;
 598 }
 599
 600 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 601 {
 602         switch (hw->device_id) {
 603         case PCI_DEVICE_ID_ATTANSIC_L2C:
 604                 hw->nic_type = athr_l2c;
 605                 break;
 606         case PCI_DEVICE_ID_ATTANSIC_L1C:
 607                 hw->nic_type = athr_l1c;
 608                 break;
 609         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 610                 hw->nic_type = athr_l2c_b;
 611                 break;
 612         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 613                 hw->nic_type = athr_l2c_b2;
 614                 break;
 615         case PCI_DEVICE_ID_ATHEROS_L1D:
 616                 hw->nic_type = athr_l1d;
 617                 break;
 618         default:
 619                 break;
 620         }
 621 }
 622
 623 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 624 {
 625         u32 phy_status_data;
 626         u32 link_ctrl_data;
 627
 628         atl1c_set_mac_type(hw);
 629         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 630         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 631
 632         hw->ctrl_flags = ATL1C_INTR_CLEAR_ON_READ |
 633                          ATL1C_INTR_MODRT_ENABLE  |
 634                          ATL1C_RX_IPV6_CHKSUM     |
 635                          ATL1C_TXQ_MODE_ENHANCE;
 636         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 637                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 638         if (link_ctrl_data & LINK_CTRL_L1_EN)
 639                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 640         if (link_ctrl_data & LINK_CTRL_EXT_SYNC)
 641                 hw->ctrl_flags |= ATL1C_LINK_EXT_SYNC;
 642
 643         if (hw->nic_type == athr_l1c ||
 644             hw->nic_type == athr_l1d) {
 645                 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 646                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 647         }
 648         return 0;
 649 }
 650 /*
 651  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 652  * @adapter: board private structure to initialize
 653  *
 654  * atl1c_sw_init initializes the Adapter private data structure.
 655  * Fields are initialized based on PCI device information and
 656  * OS network device settings (MTU size).
 657  */
 658 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 659 {
 660         struct atl1c_hw *hw   = &adapter->hw;
 661         struct pci_dev  *pdev = adapter->pdev;
 662
 663         adapter->wol = 0;
 664         adapter->link_speed = SPEED_0;
 665         adapter->link_duplex = FULL_DUPLEX;
 666         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
 667         adapter->tpd_ring[0].count = 1024;
 668         adapter->rfd_ring[0].count = 512;
 669
 670         hw->vendor_id = pdev->vendor;
 671         hw->device_id = pdev->device;
 672         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 673         hw->subsystem_id = pdev->subsystem_device;
 674
 675         /* before link up, we assume hibernate is true */
 676         hw->hibernate = true;
 677         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 678         if (atl1c_setup_mac_funcs(hw) != 0) {
 679                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 680                 return -1;
 681         }
 682         hw->intr_mask = IMR_NORMAL_MASK;
 683         hw->phy_configured = false;
 684         hw->preamble_len = 7;
 685         hw->max_frame_size = adapter->netdev->mtu;
 686         if (adapter->num_rx_queues < 2) {
 687                 hw->rss_type = atl1c_rss_disable;
 688                 hw->rss_mode = atl1c_rss_mode_disable;
 689         } else {
 690                 hw->rss_type = atl1c_rss_ipv4;
 691                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
 692                 hw->rss_hash_bits = 16;
 693         }
 694         hw->autoneg_advertised = ADVERTISED_Autoneg;
 695         hw->indirect_tab = 0xE4E4E4E4;
 696         hw->base_cpu = 0;
 697
 698         hw->ict = 50000;                /* 100ms */
 699         hw->smb_timer = 200000;         /* 400ms */
 700         hw->cmb_tpd = 4;
 701         hw->cmb_tx_timer = 1;           /* 2 us  */
 702         hw->rx_imt = 200;
 703         hw->tx_imt = 1000;
 704
 705         hw->tpd_burst = 5;
 706         hw->rfd_burst = 8;
 707         hw->dma_order = atl1c_dma_ord_out;
 708         hw->dmar_block = atl1c_dma_req_1024;
 709         hw->dmaw_block = atl1c_dma_req_1024;
 710         hw->dmar_dly_cnt = 15;
 711         hw->dmaw_dly_cnt = 4;
 712
 713         if (atl1c_alloc_queues(adapter)) {
 714                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 715                 return -ENOMEM;
 716         }
 717         /* TODO */
 718         atl1c_set_rxbufsize(adapter, adapter->netdev);
 719         atomic_set(&adapter->irq_sem, 1);
 720         spin_lock_init(&adapter->mdio_lock);
 721         spin_lock_init(&adapter->tx_lock);
 722         set_bit(__AT_DOWN, &adapter->flags);
 723
 724         return 0;
 725 }
 726
 727 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 728                                 struct atl1c_buffer *buffer_info, int in_irq)
 729 {
 730         u16 pci_driection;
 731         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 732                 return;
 733         if (buffer_info->dma) {
 734                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 735                         pci_driection = PCI_DMA_FROMDEVICE;
 736                 else
 737                         pci_driection = PCI_DMA_TODEVICE;
 738
 739                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 740                         pci_unmap_single(pdev, buffer_info->dma,
 741                                         buffer_info->length, pci_driection);
 742                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 743                         pci_unmap_page(pdev, buffer_info->dma,
 744                                         buffer_info->length, pci_driection);
 745         }
 746         if (buffer_info->skb) {
 747                 if (in_irq)
 748                         dev_kfree_skb_irq(buffer_info->skb);
 749                 else
 750                         dev_kfree_skb(buffer_info->skb);
 751         }
 752         buffer_info->dma = 0;
 753         buffer_info->skb = NULL;
 754         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 755 }
 756 /*
 757  * atl1c_clean_tx_ring - Free Tx-skb
 758  * @adapter: board private structure
 759  */
 760 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 761                                 enum atl1c_trans_queue type)
 762 {
 763         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 764         struct atl1c_buffer *buffer_info;
 765         struct pci_dev *pdev = adapter->pdev;
 766         u16 index, ring_count;
 767
 768         ring_count = tpd_ring->count;
 769         for (index = 0; index < ring_count; index++) {
 770                 buffer_info = &tpd_ring->buffer_info[index];
 771                 atl1c_clean_buffer(pdev, buffer_info, 0);
 772         }
 773
 774         /* Zero out Tx-buffers */
 775         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 776                 ring_count);
 777         atomic_set(&tpd_ring->next_to_clean, 0);
 778         tpd_ring->next_to_use = 0;
 779 }
 780
 781 /*
 782  * atl1c_clean_rx_ring - Free rx-reservation skbs
 783  * @adapter: board private structure
 784  */
 785 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 786 {
 787         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 788         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 789         struct atl1c_buffer *buffer_info;
 790         struct pci_dev *pdev = adapter->pdev;
 791         int i, j;
 792
 793         for (i = 0; i < adapter->num_rx_queues; i++) {
 794                 for (j = 0; j < rfd_ring[i].count; j++) {
 795                         buffer_info = &rfd_ring[i].buffer_info[j];
 796                         atl1c_clean_buffer(pdev, buffer_info, 0);
 797                 }
 798                 /* zero out the descriptor ring */
 799                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
 800                 rfd_ring[i].next_to_clean = 0;
 801                 rfd_ring[i].next_to_use = 0;
 802                 rrd_ring[i].next_to_use = 0;
 803                 rrd_ring[i].next_to_clean = 0;
 804         }
 805 }
 806
 807 /*
 808  * Read / Write Ptr Initialize:
 809  */
 810 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 811 {
 812         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 813         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 814         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 815         struct atl1c_buffer *buffer_info;
 816         int i, j;
 817
 818         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 819                 tpd_ring[i].next_to_use = 0;
 820                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 821                 buffer_info = tpd_ring[i].buffer_info;
 822                 for (j = 0; j < tpd_ring->count; j++)
 823                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 824                                         ATL1C_BUFFER_FREE);
 825         }
 826         for (i = 0; i < adapter->num_rx_queues; i++) {
 827                 rfd_ring[i].next_to_use = 0;
 828                 rfd_ring[i].next_to_clean = 0;
 829                 rrd_ring[i].next_to_use = 0;
 830                 rrd_ring[i].next_to_clean = 0;
 831                 for (j = 0; j < rfd_ring[i].count; j++) {
 832                         buffer_info = &rfd_ring[i].buffer_info[j];
 833                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 834                 }
 835         }
 836 }
 837
 838 /*
 839  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 840  * @adapter: board private structure
 841  *
 842  * Free all transmit software resources
 843  */
 844 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 845 {
 846         struct pci_dev *pdev = adapter->pdev;
 847
 848         pci_free_consistent(pdev, adapter->ring_header.size,
 849                                         adapter->ring_header.desc,
 850                                         adapter->ring_header.dma);
 851         adapter->ring_header.desc = NULL;
 852
 853         /* Note: just free tdp_ring.buffer_info,
 854         *  it contain rfd_ring.buffer_info, do not double free */
 855         if (adapter->tpd_ring[0].buffer_info) {
 856                 kfree(adapter->tpd_ring[0].buffer_info);
 857                 adapter->tpd_ring[0].buffer_info = NULL;
 858         }
 859 }
 860
 861 /*
 862  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 863  * @adapter: board private structure
 864  *
 865  * Return 0 on success, negative on failure
 866  */
 867 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 868 {
 869         struct pci_dev *pdev = adapter->pdev;
 870         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 871         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 872         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 873         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 874         int num_rx_queues = adapter->num_rx_queues;
 875         int size;
 876         int i;
 877         int count = 0;
 878         int rx_desc_count = 0;
 879         u32 offset = 0;
 880
 881         rrd_ring[0].count = rfd_ring[0].count;
 882         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 883                 tpd_ring[i].count = tpd_ring[0].count;
 884
 885         for (i = 1; i < adapter->num_rx_queues; i++)
 886                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
 887
 888         /* 2 tpd queue, one high priority queue,
 889          * another normal priority queue */
 890         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 891                 rfd_ring->count * num_rx_queues);
 892         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 893         if (unlikely(!tpd_ring->buffer_info)) {
 894                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 895                         size);
 896                 goto err_nomem;
 897         }
 898         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 899                 tpd_ring[i].buffer_info =
 900                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 901                 count += tpd_ring[i].count;
 902         }
 903
 904         for (i = 0; i < num_rx_queues; i++) {
 905                 rfd_ring[i].buffer_info =
 906                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 907                 count += rfd_ring[i].count;
 908                 rx_desc_count += rfd_ring[i].count;
 909         }
 910         /*
 911          * real ring DMA buffer
 912          * each ring/block may need up to 8 bytes for alignment, hence the
 913          * additional bytes tacked onto the end.
 914          */
 915         ring_header->size = size =
 916                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 917                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 918                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 919                 sizeof(struct atl1c_hw_stats) +
 920                 8 * 4 + 8 * 2 * num_rx_queues;
 921
 922         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 923                                 &ring_header->dma);
 924         if (unlikely(!ring_header->desc)) {
 925                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 926                 goto err_nomem;
 927         }
 928         memset(ring_header->desc, 0, ring_header->size);
 929         /* init TPD ring */
 930
 931         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 932         offset = tpd_ring[0].dma - ring_header->dma;
 933         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 934                 tpd_ring[i].dma = ring_header->dma + offset;
 935                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 936                 tpd_ring[i].size =
 937                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 938                 offset += roundup(tpd_ring[i].size, 8);
 939         }
 940         /* init RFD ring */
 941         for (i = 0; i < num_rx_queues; i++) {
 942                 rfd_ring[i].dma = ring_header->dma + offset;
 943                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
 944                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
 945                                 rfd_ring[i].count;
 946                 offset += roundup(rfd_ring[i].size, 8);
 947         }
 948
 949         /* init RRD ring */
 950         for (i = 0; i < num_rx_queues; i++) {
 951                 rrd_ring[i].dma = ring_header->dma + offset;
 952                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
 953                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
 954                                 rrd_ring[i].count;
 955                 offset += roundup(rrd_ring[i].size, 8);
 956         }
 957
 958         adapter->smb.dma = ring_header->dma + offset;
 959         adapter->smb.smb = (u8 *)ring_header->desc + offset;
 960         return 0;
 961
 962 err_nomem:
 963         kfree(tpd_ring->buffer_info);
 964         return -ENOMEM;
 965 }
 966
 967 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
 968 {
 969         struct atl1c_hw *hw = &adapter->hw;
 970         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
 971                                 adapter->rfd_ring;
 972         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
 973                                 adapter->rrd_ring;
 974         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
 975                                 adapter->tpd_ring;
 976         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
 977         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
 978         int i;
 979
 980         /* TPD */
 981         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
 982                         (u32)((tpd_ring[atl1c_trans_normal].dma &
 983                                 AT_DMA_HI_ADDR_MASK) >> 32));
 984         /* just enable normal priority TX queue */
 985         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
 986                         (u32)(tpd_ring[atl1c_trans_normal].dma &
 987                                 AT_DMA_LO_ADDR_MASK));
 988         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
 989                         (u32)(tpd_ring[atl1c_trans_high].dma &
 990                                 AT_DMA_LO_ADDR_MASK));
 991         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
 992                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
 993
 994
 995         /* RFD */
 996         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
 997                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
 998         for (i = 0; i < adapter->num_rx_queues; i++)
 999                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
1000                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1001
1002         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1003                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
1004         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1005                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1006
1007         /* RRD */
1008         for (i = 0; i < adapter->num_rx_queues; i++)
1009                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
1010                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1011         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1012                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
1013
1014         /* CMB */
1015         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
1016
1017         /* SMB */
1018         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
1019                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1020         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
1021                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
1022         /* Load all of base address above */
1023         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1024 }
1025
1026 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1027 {
1028         struct atl1c_hw *hw = &adapter->hw;
1029         u32 dev_ctrl_data;
1030         u32 max_pay_load;
1031         u16 tx_offload_thresh;
1032         u32 txq_ctrl_data;
1033         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
1034
1035         extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1036         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1037         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1038                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1039         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1040         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1041                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1042         hw->dmaw_block = min(max_pay_load, hw->dmaw_block);
1043         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1044                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1045         hw->dmar_block = min(max_pay_load, hw->dmar_block);
1046
1047         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1048                         TXQ_NUM_TPD_BURST_SHIFT;
1049         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1050                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1051         txq_ctrl_data |= (atl1c_pay_load_size[hw->dmar_block] &
1052                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1053
1054         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1055 }
1056
1057 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1058 {
1059         struct atl1c_hw *hw = &adapter->hw;
1060         u32 rxq_ctrl_data;
1061
1062         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1063                         RXQ_RFD_BURST_NUM_SHIFT;
1064
1065         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1066                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1067         if (hw->rss_type == atl1c_rss_ipv4)
1068                 rxq_ctrl_data |= RSS_HASH_IPV4;
1069         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1070                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1071         if (hw->rss_type == atl1c_rss_ipv6)
1072                 rxq_ctrl_data |= RSS_HASH_IPV6;
1073         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1074                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1075         if (hw->rss_type != atl1c_rss_disable)
1076                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1077
1078         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1079                         RSS_MODE_SHIFT;
1080         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1081                         RSS_HASH_BITS_SHIFT;
1082         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1083                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_100M &
1084                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1085
1086         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1087 }
1088
1089 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1090 {
1091         struct atl1c_hw *hw = &adapter->hw;
1092
1093         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1094         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1095 }
1096
1097 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1098 {
1099         struct atl1c_hw *hw = &adapter->hw;
1100         u32 dma_ctrl_data;
1101
1102         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1103         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1104                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1105         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1106                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1107         else
1108                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1109
1110         switch (hw->dma_order) {
1111         case atl1c_dma_ord_in:
1112                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1113                 break;
1114         case atl1c_dma_ord_enh:
1115                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1116                 break;
1117         case atl1c_dma_ord_out:
1118                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1119                 break;
1120         default:
1121                 break;
1122         }
1123
1124         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1125                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1126         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1127                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1128         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1129                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1130         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1131                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1132
1133         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1134 }
1135
1136 /*
1137  * Stop the mac, transmit and receive units
1138  * hw - Struct containing variables accessed by shared code
1139  * return : 0  or  idle status (if error)
1140  */
1141 static int atl1c_stop_mac(struct atl1c_hw *hw)
1142 {
1143         u32 data;
1144
1145         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1146         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1147                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1148         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1149
1150         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1151         data &= ~TXQ_CTRL_EN;
1152         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1153
1154         atl1c_wait_until_idle(hw);
1155
1156         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1157         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1158         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1159
1160         return (int)atl1c_wait_until_idle(hw);
1161 }
1162
1163 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1164 {
1165         u32 data;
1166
1167         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1168         switch (hw->adapter->num_rx_queues) {
1169         case 4:
1170                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1171                 break;
1172         case 3:
1173                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1174                 break;
1175         case 2:
1176                 data |= RXQ1_CTRL_EN;
1177                 break;
1178         default:
1179                 break;
1180         }
1181         data |= RXQ_CTRL_EN;
1182         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1183 }
1184
1185 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1186 {
1187         u32 data;
1188
1189         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1190         data |= TXQ_CTRL_EN;
1191         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1192 }
1193
1194 /*
1195  * Reset the transmit and receive units; mask and clear all interrupts.
1196  * hw - Struct containing variables accessed by shared code
1197  * return : 0  or  idle status (if error)
1198  */
1199 static int atl1c_reset_mac(struct atl1c_hw *hw)
1200 {
1201         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1202         struct pci_dev *pdev = adapter->pdev;
1203         int ret;
1204
1205         AT_WRITE_REG(hw, REG_IMR, 0);
1206         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1207
1208         ret = atl1c_stop_mac(hw);
1209         if (ret)
1210                 return ret;
1211         /*
1212          * Issue Soft Reset to the MAC.  This will reset the chip's
1213          * transmit, receive, DMA.  It will not effect
1214          * the current PCI configuration.  The global reset bit is self-
1215          * clearing, and should clear within a microsecond.
1216          */
1217         AT_WRITE_REGW(hw, REG_MASTER_CTRL, MASTER_CTRL_SOFT_RST);
1218         AT_WRITE_FLUSH(hw);
1219         msleep(10);
1220         /* Wait at least 10ms for All module to be Idle */
1221
1222         if (atl1c_wait_until_idle(hw)) {
1223                 dev_err(&pdev->dev,
1224                         "MAC state machine can't be idle since"
1225                         " disabled for 10ms second\n");
1226                 return -1;
1227         }
1228         return 0;
1229 }
1230
1231 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1232 {
1233         u32 pm_ctrl_data;
1234
1235         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1236         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1237                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1238         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1239         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1240         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1241         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1242         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1243
1244         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1245         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1246         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1247         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1248 }
1249
1250 /*
1251  * Set ASPM state.
1252  * Enable/disable L0s/L1 depend on link state.
1253  */
1254 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1255 {
1256         u32 pm_ctrl_data;
1257         u32 link_ctrl_data;
1258
1259         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1260         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
1261         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1262
1263         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1264                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1265         pm_ctrl_data &= ~(PM_CTRL_LCKDET_TIMER_MASK <<
1266                           PM_CTRL_LCKDET_TIMER_SHIFT);
1267
1268         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1269         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1270         pm_ctrl_data |= PM_CTRL_RBER_EN;
1271         pm_ctrl_data |= PM_CTRL_SDES_EN;
1272
1273         if (hw->nic_type == athr_l2c_b ||
1274             hw->nic_type == athr_l1d ||
1275             hw->nic_type == athr_l2c_b2) {
1276                 link_ctrl_data &= ~LINK_CTRL_EXT_SYNC;
1277                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE)) {
1278                         if (hw->nic_type == athr_l2c_b &&
1279                             hw->revision_id == L2CB_V10)
1280                                 link_ctrl_data |= LINK_CTRL_EXT_SYNC;
1281                 }
1282
1283                 AT_WRITE_REG(hw, REG_LINK_CTRL, link_ctrl_data);
1284
1285                 pm_ctrl_data |= PM_CTRL_PCIE_RECV;
1286                 pm_ctrl_data |= AT_ASPM_L1_TIMER << PM_CTRL_PM_REQ_TIMER_SHIFT;
1287                 pm_ctrl_data &= ~PM_CTRL_EN_BUFS_RX_L0S;
1288                 pm_ctrl_data &= ~PM_CTRL_SA_DLY_EN;
1289                 pm_ctrl_data &= ~PM_CTRL_HOTRST;
1290                 pm_ctrl_data |= 1 << PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1291                 pm_ctrl_data |= PM_CTRL_SERDES_PD_EX_L1;
1292         }
1293
1294         if (linkup) {
1295                 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1296                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1297                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1298                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1299                 if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1300                         pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN;
1301
1302                 if (hw->nic_type == athr_l2c_b ||
1303                     hw->nic_type == athr_l1d ||
1304                     hw->nic_type == athr_l2c_b2) {
1305                         if (hw->nic_type == athr_l2c_b)
1306                                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE))
1307                                         pm_ctrl_data &= PM_CTRL_ASPM_L0S_EN;
1308                         pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1309                         pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1310                         pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1311                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1312                         if (hw->adapter->link_speed == SPEED_100 ||
1313                             hw->adapter->link_speed == SPEED_1000) {
1314                                 pm_ctrl_data &=
1315                                         ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1316                                           PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1317                                 if (hw->nic_type == athr_l1d)
1318                                         pm_ctrl_data |= 0xF <<
1319                                                 PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1320                                 else
1321                                         pm_ctrl_data |= 7 <<
1322                                                 PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1323                         }
1324                 } else {
1325                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1326                         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1327                         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1328                         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1329                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1330                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1331                 }
1332                 atl1c_write_phy_reg(hw, MII_DBG_ADDR, 0x29);
1333                 if (hw->adapter->link_speed == SPEED_10)
1334                         if (hw->nic_type == athr_l1d)
1335                                 atl1c_write_phy_reg(hw, MII_DBG_ADDR, 0xB69D);
1336                         else
1337                                 atl1c_write_phy_reg(hw, MII_DBG_DATA, 0xB6DD);
1338                 else if (hw->adapter->link_speed == SPEED_100)
1339                         atl1c_write_phy_reg(hw, MII_DBG_DATA, 0xB2DD);
1340                 else
1341                         atl1c_write_phy_reg(hw, MII_DBG_DATA, 0x96DD);
1342
1343         } else {
1344                 pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1345                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1346                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1347                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1348
1349                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1350
1351                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1352                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1353                 else
1354                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1355         }
1356
1357         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1358 }
1359
1360 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1361 {
1362         struct atl1c_hw *hw = &adapter->hw;
1363         struct net_device *netdev = adapter->netdev;
1364         u32 mac_ctrl_data;
1365
1366         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1367         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1368
1369         if (adapter->link_duplex == FULL_DUPLEX) {
1370                 hw->mac_duplex = true;
1371                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1372         }
1373
1374         if (adapter->link_speed == SPEED_1000)
1375                 hw->mac_speed = atl1c_mac_speed_1000;
1376         else
1377                 hw->mac_speed = atl1c_mac_speed_10_100;
1378
1379         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1380                         MAC_CTRL_SPEED_SHIFT;
1381
1382         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1383         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1384                         MAC_CTRL_PRMLEN_SHIFT);
1385
1386         if (adapter->vlgrp)
1387                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1388
1389         mac_ctrl_data |= MAC_CTRL_BC_EN;
1390         if (netdev->flags & IFF_PROMISC)
1391                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1392         if (netdev->flags & IFF_ALLMULTI)
1393                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1394
1395         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1396         if (hw->nic_type == athr_l1d || hw->nic_type == athr_l2c_b2) {
1397                 mac_ctrl_data |= MAC_CTRL_SPEED_MODE_SW;
1398                 mac_ctrl_data |= MAC_CTRL_HASH_ALG_CRC32;
1399         }
1400         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1401 }
1402
1403 /*
1404  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1405  * @adapter: board private structure
1406  *
1407  * Configure the Tx /Rx unit of the MAC after a reset.
1408  */
1409 static int atl1c_configure(struct atl1c_adapter *adapter)
1410 {
1411         struct atl1c_hw *hw = &adapter->hw;
1412         u32 master_ctrl_data = 0;
1413         u32 intr_modrt_data;
1414
1415         /* clear interrupt status */
1416         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1417         /*  Clear any WOL status */
1418         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1419         /* set Interrupt Clear Timer
1420          * HW will enable self to assert interrupt event to system after
1421          * waiting x-time for software to notify it accept interrupt.
1422          */
1423         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1424                 hw->ict & INT_RETRIG_TIMER_MASK);
1425
1426         atl1c_configure_des_ring(adapter);
1427
1428         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1429                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1430                                         IRQ_MODRT_TX_TIMER_SHIFT;
1431                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1432                                         IRQ_MODRT_RX_TIMER_SHIFT;
1433                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1434                 master_ctrl_data |=
1435                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1436         }
1437
1438         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1439                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1440
1441         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1442
1443         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1444                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1445                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1446                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1447                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1448         }
1449
1450         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1451                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1452                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1453         /* set MTU */
1454         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1455                         VLAN_HLEN + ETH_FCS_LEN);
1456         /* HDS, disable */
1457         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1458
1459         atl1c_configure_tx(adapter);
1460         atl1c_configure_rx(adapter);
1461         atl1c_configure_rss(adapter);
1462         atl1c_configure_dma(adapter);
1463
1464         return 0;
1465 }
1466
1467 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1468 {
1469         u16 hw_reg_addr = 0;
1470         unsigned long *stats_item = NULL;
1471         u32 data;
1472
1473         /* update rx status */
1474         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1475         stats_item  = &adapter->hw_stats.rx_ok;
1476         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1477                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1478                 *stats_item += data;
1479                 stats_item++;
1480                 hw_reg_addr += 4;
1481         }
1482 /* update tx status */
1483         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1484         stats_item  = &adapter->hw_stats.tx_ok;
1485         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1486                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1487                 *stats_item += data;
1488                 stats_item++;
1489                 hw_reg_addr += 4;
1490         }
1491 }
1492
1493 /*
1494  * atl1c_get_stats - Get System Network Statistics
1495  * @netdev: network interface device structure
1496  *
1497  * Returns the address of the device statistics structure.
1498  * The statistics are actually updated from the timer callback.
1499  */
1500 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1501 {
1502         struct atl1c_adapter *adapter = netdev_priv(netdev);
1503         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1504         struct net_device_stats *net_stats = &adapter->net_stats;
1505
1506         atl1c_update_hw_stats(adapter);
1507         net_stats->rx_packets = hw_stats->rx_ok;
1508         net_stats->tx_packets = hw_stats->tx_ok;
1509         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1510         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1511         net_stats->multicast  = hw_stats->rx_mcast;
1512         net_stats->collisions = hw_stats->tx_1_col +
1513                                 hw_stats->tx_2_col * 2 +
1514                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1515         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1516                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1517                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1518         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1519         net_stats->rx_length_errors = hw_stats->rx_len_err;
1520         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1521         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1522         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1523
1524         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1525
1526         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1527                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1528         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1529         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1530         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1531
1532         return &adapter->net_stats;
1533 }
1534
1535 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1536 {
1537         u16 phy_data;
1538
1539         spin_lock(&adapter->mdio_lock);
1540         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1541         spin_unlock(&adapter->mdio_lock);
1542 }
1543
1544 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1545                                 enum atl1c_trans_queue type)
1546 {
1547         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1548                                 &adapter->tpd_ring[type];
1549         struct atl1c_buffer *buffer_info;
1550         struct pci_dev *pdev = adapter->pdev;
1551         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1552         u16 hw_next_to_clean;
1553         u16 shift;
1554         u32 data;
1555
1556         if (type == atl1c_trans_high)
1557                 shift = MB_HTPD_CONS_IDX_SHIFT;
1558         else
1559                 shift = MB_NTPD_CONS_IDX_SHIFT;
1560
1561         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1562         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1563
1564         while (next_to_clean != hw_next_to_clean) {
1565                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1566                 atl1c_clean_buffer(pdev, buffer_info, 1);
1567                 if (++next_to_clean == tpd_ring->count)
1568                         next_to_clean = 0;
1569                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1570         }
1571
1572         if (netif_queue_stopped(adapter->netdev) &&
1573                         netif_carrier_ok(adapter->netdev)) {
1574                 netif_wake_queue(adapter->netdev);
1575         }
1576
1577         return true;
1578 }
1579
1580 /*
1581  * atl1c_intr - Interrupt Handler
1582  * @irq: interrupt number
1583  * @data: pointer to a network interface device structure
1584  * @pt_regs: CPU registers structure
1585  */
1586 static irqreturn_t atl1c_intr(int irq, void *data)
1587 {
1588         struct net_device *netdev  = data;
1589         struct atl1c_adapter *adapter = netdev_priv(netdev);
1590         struct pci_dev *pdev = adapter->pdev;
1591         struct atl1c_hw *hw = &adapter->hw;
1592         int max_ints = AT_MAX_INT_WORK;
1593         int handled = IRQ_NONE;
1594         u32 status;
1595         u32 reg_data;
1596
1597         do {
1598                 AT_READ_REG(hw, REG_ISR, &reg_data);
1599                 status = reg_data & hw->intr_mask;
1600
1601                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1602                         if (max_ints != AT_MAX_INT_WORK)
1603                                 handled = IRQ_HANDLED;
1604                         break;
1605                 }
1606                 /* link event */
1607                 if (status & ISR_GPHY)
1608                         atl1c_clear_phy_int(adapter);
1609                 /* Ack ISR */
1610                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1611                 if (status & ISR_RX_PKT) {
1612                         if (likely(napi_schedule_prep(&adapter->napi))) {
1613                                 hw->intr_mask &= ~ISR_RX_PKT;
1614                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1615                                 __napi_schedule(&adapter->napi);
1616                         }
1617                 }
1618                 if (status & ISR_TX_PKT)
1619                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1620
1621                 handled = IRQ_HANDLED;
1622                 /* check if PCIE PHY Link down */
1623                 if (status & ISR_ERROR) {
1624                         if (netif_msg_hw(adapter))
1625                                 dev_err(&pdev->dev,
1626                                         "atl1c hardware error (status = 0x%x)\n",
1627                                         status & ISR_ERROR);
1628                         /* reset MAC */
1629                         hw->intr_mask &= ~ISR_ERROR;
1630                         AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1631                         adapter->work_event |= ATL1C_WORK_EVENT_RESET;
1632                         schedule_work(&adapter->common_task);
1633                         break;
1634                 }
1635
1636                 if (status & ISR_OVER)
1637                         if (netif_msg_intr(adapter))
1638                                 dev_warn(&pdev->dev,
1639                                         "TX/RX overflow (status = 0x%x)\n",
1640                                         status & ISR_OVER);
1641
1642                 /* link event */
1643                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1644                         adapter->net_stats.tx_carrier_errors++;
1645                         atl1c_link_chg_event(adapter);
1646                         break;
1647                 }
1648
1649         } while (--max_ints > 0);
1650         /* re-enable Interrupt*/
1651         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1652         return handled;
1653 }
1654
1655 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1656                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1657 {
1658         /*
1659          * The pid field in RRS in not correct sometimes, so we
1660          * cannot figure out if the packet is fragmented or not,
1661          * so we tell the KERNEL CHECKSUM_NONE
1662          */
1663         skb->ip_summed = CHECKSUM_NONE;
1664 }
1665
1666 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1667 {
1668         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1669         struct pci_dev *pdev = adapter->pdev;
1670         struct atl1c_buffer *buffer_info, *next_info;
1671         struct sk_buff *skb;
1672         void *vir_addr = NULL;
1673         u16 num_alloc = 0;
1674         u16 rfd_next_to_use, next_next;
1675         struct atl1c_rx_free_desc *rfd_desc;
1676
1677         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1678         if (++next_next == rfd_ring->count)
1679                 next_next = 0;
1680         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1681         next_info = &rfd_ring->buffer_info[next_next];
1682
1683         while (next_info->flags & ATL1C_BUFFER_FREE) {
1684                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1685
1686                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1687                 if (unlikely(!skb)) {
1688                         if (netif_msg_rx_err(adapter))
1689                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1690                         break;
1691                 }
1692
1693                 /*
1694                  * Make buffer alignment 2 beyond a 16 byte boundary
1695                  * this will result in a 16 byte aligned IP header after
1696                  * the 14 byte MAC header is removed
1697                  */
1698                 vir_addr = skb->data;
1699                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1700                 buffer_info->skb = skb;
1701                 buffer_info->length = adapter->rx_buffer_len;
1702                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1703                                                 buffer_info->length,
1704                                                 PCI_DMA_FROMDEVICE);
1705                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1706                         ATL1C_PCIMAP_FROMDEVICE);
1707                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1708                 rfd_next_to_use = next_next;
1709                 if (++next_next == rfd_ring->count)
1710                         next_next = 0;
1711                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1712                 next_info = &rfd_ring->buffer_info[next_next];
1713                 num_alloc++;
1714         }
1715
1716         if (num_alloc) {
1717                 /* TODO: update mailbox here */
1718                 wmb();
1719                 rfd_ring->next_to_use = rfd_next_to_use;
1720                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1721                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1722         }
1723
1724         return num_alloc;
1725 }
1726
1727 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1728                         struct  atl1c_recv_ret_status *rrs, u16 num)
1729 {
1730         u16 i;
1731         /* the relationship between rrd and rfd is one map one */
1732         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1733                                         rrd_ring->next_to_clean)) {
1734                 rrs->word3 &= ~RRS_RXD_UPDATED;
1735                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1736                         rrd_ring->next_to_clean = 0;
1737         }
1738 }
1739
1740 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1741         struct atl1c_recv_ret_status *rrs, u16 num)
1742 {
1743         u16 i;
1744         u16 rfd_index;
1745         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1746
1747         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1748                         RRS_RX_RFD_INDEX_MASK;
1749         for (i = 0; i < num; i++) {
1750                 buffer_info[rfd_index].skb = NULL;
1751                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1752                                         ATL1C_BUFFER_FREE);
1753                 if (++rfd_index == rfd_ring->count)
1754                         rfd_index = 0;
1755         }
1756         rfd_ring->next_to_clean = rfd_index;
1757 }
1758
1759 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1760                    int *work_done, int work_to_do)
1761 {
1762         u16 rfd_num, rfd_index;
1763         u16 count = 0;
1764         u16 length;
1765         struct pci_dev *pdev = adapter->pdev;
1766         struct net_device *netdev  = adapter->netdev;
1767         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1768         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1769         struct sk_buff *skb;
1770         struct atl1c_recv_ret_status *rrs;
1771         struct atl1c_buffer *buffer_info;
1772
1773         while (1) {
1774                 if (*work_done >= work_to_do)
1775                         break;
1776                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1777                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1778                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1779                                 RRS_RX_RFD_CNT_MASK;
1780                         if (unlikely(rfd_num != 1))
1781                                 /* TODO support mul rfd*/
1782                                 if (netif_msg_rx_err(adapter))
1783                                         dev_warn(&pdev->dev,
1784                                                 "Multi rfd not support yet!\n");
1785                         goto rrs_checked;
1786                 } else {
1787                         break;
1788                 }
1789 rrs_checked:
1790                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1791                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1792                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1793                                 if (netif_msg_rx_err(adapter))
1794                                         dev_warn(&pdev->dev,
1795                                                 "wrong packet! rrs word3 is %x\n",
1796                                                 rrs->word3);
1797                         continue;
1798                 }
1799
1800                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1801                                 RRS_PKT_SIZE_MASK);
1802                 /* Good Receive */
1803                 if (likely(rfd_num == 1)) {
1804                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1805                                         RRS_RX_RFD_INDEX_MASK;
1806                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1807                         pci_unmap_single(pdev, buffer_info->dma,
1808                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1809                         skb = buffer_info->skb;
1810                 } else {
1811                         /* TODO */
1812                         if (netif_msg_rx_err(adapter))
1813                                 dev_warn(&pdev->dev,
1814                                         "Multi rfd not support yet!\n");
1815                         break;
1816                 }
1817                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1818                 skb_put(skb, length - ETH_FCS_LEN);
1819                 skb->protocol = eth_type_trans(skb, netdev);
1820                 atl1c_rx_checksum(adapter, skb, rrs);
1821                 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1822                         u16 vlan;
1823
1824                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1825                         vlan = le16_to_cpu(vlan);
1826                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1827                 } else
1828                         netif_receive_skb(skb);
1829
1830                 (*work_done)++;
1831                 count++;
1832         }
1833         if (count)
1834                 atl1c_alloc_rx_buffer(adapter, que);
1835 }
1836
1837 /*
1838  * atl1c_clean - NAPI Rx polling callback
1839  * @adapter: board private structure
1840  */
1841 static int atl1c_clean(struct napi_struct *napi, int budget)
1842 {
1843         struct atl1c_adapter *adapter =
1844                         container_of(napi, struct atl1c_adapter, napi);
1845         int work_done = 0;
1846
1847         /* Keep link state information with original netdev */
1848         if (!netif_carrier_ok(adapter->netdev))
1849                 goto quit_polling;
1850         /* just enable one RXQ */
1851         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1852
1853         if (work_done < budget) {
1854 quit_polling:
1855                 napi_complete(napi);
1856                 adapter->hw.intr_mask |= ISR_RX_PKT;
1857                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1858         }
1859         return work_done;
1860 }
1861
1862 #ifdef CONFIG_NET_POLL_CONTROLLER
1863
1864 /*
1865  * Polling 'interrupt' - used by things like netconsole to send skbs
1866  * without having to re-enable interrupts. It's not called while
1867  * the interrupt routine is executing.
1868  */
1869 static void atl1c_netpoll(struct net_device *netdev)
1870 {
1871         struct atl1c_adapter *adapter = netdev_priv(netdev);
1872
1873         disable_irq(adapter->pdev->irq);
1874         atl1c_intr(adapter->pdev->irq, netdev);
1875         enable_irq(adapter->pdev->irq);
1876 }
1877 #endif
1878
1879 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1880 {
1881         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1882         u16 next_to_use = 0;
1883         u16 next_to_clean = 0;
1884
1885         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1886         next_to_use   = tpd_ring->next_to_use;
1887
1888         return (u16)(next_to_clean > next_to_use) ?
1889                 (next_to_clean - next_to_use - 1) :
1890                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1891 }
1892
1893 /*
1894  * get next usable tpd
1895  * Note: should call atl1c_tdp_avail to make sure
1896  * there is enough tpd to use
1897  */
1898 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1899         enum atl1c_trans_queue type)
1900 {
1901         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1902         struct atl1c_tpd_desc *tpd_desc;
1903         u16 next_to_use = 0;
1904
1905         next_to_use = tpd_ring->next_to_use;
1906         if (++tpd_ring->next_to_use == tpd_ring->count)
1907                 tpd_ring->next_to_use = 0;
1908         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1909         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1910         return  tpd_desc;
1911 }
1912
1913 static struct atl1c_buffer *
1914 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1915 {
1916         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1917
1918         return &tpd_ring->buffer_info[tpd -
1919                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1920 }
1921
1922 /* Calculate the transmit packet descript needed*/
1923 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1924 {
1925         u16 tpd_req;
1926         u16 proto_hdr_len = 0;
1927
1928         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1929
1930         if (skb_is_gso(skb)) {
1931                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1932                 if (proto_hdr_len < skb_headlen(skb))
1933                         tpd_req++;
1934                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1935                         tpd_req++;
1936         }
1937         return tpd_req;
1938 }
1939
1940 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1941                           struct sk_buff *skb,
1942                           struct atl1c_tpd_desc **tpd,
1943                           enum atl1c_trans_queue type)
1944 {
1945         struct pci_dev *pdev = adapter->pdev;
1946         u8 hdr_len;
1947         u32 real_len;
1948         unsigned short offload_type;
1949         int err;
1950
1951         if (skb_is_gso(skb)) {
1952                 if (skb_header_cloned(skb)) {
1953                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1954                         if (unlikely(err))
1955                                 return -1;
1956                 }
1957                 offload_type = skb_shinfo(skb)->gso_type;
1958
1959                 if (offload_type & SKB_GSO_TCPV4) {
1960                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1961                                         + ntohs(ip_hdr(skb)->tot_len));
1962
1963                         if (real_len < skb->len)
1964                                 pskb_trim(skb, real_len);
1965
1966                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1967                         if (unlikely(skb->len == hdr_len)) {
1968                                 /* only xsum need */
1969                                 if (netif_msg_tx_queued(adapter))
1970                                         dev_warn(&pdev->dev,
1971                                                 "IPV4 tso with zero data??\n");
1972                                 goto check_sum;
1973                         } else {
1974                                 ip_hdr(skb)->check = 0;
1975                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
1976                                                         ip_hdr(skb)->saddr,
1977                                                         ip_hdr(skb)->daddr,
1978                                                         0, IPPROTO_TCP, 0);
1979                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
1980                         }
1981                 }
1982
1983                 if (offload_type & SKB_GSO_TCPV6) {
1984                         struct atl1c_tpd_ext_desc *etpd =
1985                                 *(struct atl1c_tpd_ext_desc **)(tpd);
1986
1987                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
1988                         *tpd = atl1c_get_tpd(adapter, type);
1989                         ipv6_hdr(skb)->payload_len = 0;
1990                         /* check payload == 0 byte ? */
1991                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1992                         if (unlikely(skb->len == hdr_len)) {
1993                                 /* only xsum need */
1994                                 if (netif_msg_tx_queued(adapter))
1995                                         dev_warn(&pdev->dev,
1996                                                 "IPV6 tso with zero data??\n");
1997                                 goto check_sum;
1998                         } else
1999                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2000                                                 &ipv6_hdr(skb)->saddr,
2001                                                 &ipv6_hdr(skb)->daddr,
2002                                                 0, IPPROTO_TCP, 0);
2003                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2004                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2005                         etpd->pkt_len = cpu_to_le32(skb->len);
2006                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2007                 }
2008
2009                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2010                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2011                                 TPD_TCPHDR_OFFSET_SHIFT;
2012                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2013                                 TPD_MSS_SHIFT;
2014                 return 0;
2015         }
2016
2017 check_sum:
2018         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2019                 u8 css, cso;
2020                 cso = skb_transport_offset(skb);
2021
2022                 if (unlikely(cso & 0x1)) {
2023                         if (netif_msg_tx_err(adapter))
2024                                 dev_err(&adapter->pdev->dev,
2025                                         "payload offset should not an event number\n");
2026                         return -1;
2027                 } else {
2028                         css = cso + skb->csum_offset;
2029
2030                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2031                                         TPD_PLOADOFFSET_SHIFT;
2032                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2033                                         TPD_CCSUM_OFFSET_SHIFT;
2034                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2035                 }
2036         }
2037         return 0;
2038 }
2039
2040 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2041                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2042                         enum atl1c_trans_queue type)
2043 {
2044         struct atl1c_tpd_desc *use_tpd = NULL;
2045         struct atl1c_buffer *buffer_info = NULL;
2046         u16 buf_len = skb_headlen(skb);
2047         u16 map_len = 0;
2048         u16 mapped_len = 0;
2049         u16 hdr_len = 0;
2050         u16 nr_frags;
2051         u16 f;
2052         int tso;
2053
2054         nr_frags = skb_shinfo(skb)->nr_frags;
2055         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2056         if (tso) {
2057                 /* TSO */
2058                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2059                 use_tpd = tpd;
2060
2061                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2062                 buffer_info->length = map_len;
2063                 buffer_info->dma = pci_map_single(adapter->pdev,
2064                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2065                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2066                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2067                         ATL1C_PCIMAP_TODEVICE);
2068                 mapped_len += map_len;
2069                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2070                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2071         }
2072
2073         if (mapped_len < buf_len) {
2074                 /* mapped_len == 0, means we should use the first tpd,
2075                    which is given by caller  */
2076                 if (mapped_len == 0)
2077                         use_tpd = tpd;
2078                 else {
2079                         use_tpd = atl1c_get_tpd(adapter, type);
2080                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2081                 }
2082                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2083                 buffer_info->length = buf_len - mapped_len;
2084                 buffer_info->dma =
2085                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2086                                         buffer_info->length, PCI_DMA_TODEVICE);
2087                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2088                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2089                         ATL1C_PCIMAP_TODEVICE);
2090                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2091                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2092         }
2093
2094         for (f = 0; f < nr_frags; f++) {
2095                 struct skb_frag_struct *frag;
2096
2097                 frag = &skb_shinfo(skb)->frags[f];
2098
2099                 use_tpd = atl1c_get_tpd(adapter, type);
2100                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2101
2102                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2103                 buffer_info->length = frag->size;
2104                 buffer_info->dma =
2105                         pci_map_page(adapter->pdev, frag->page,
2106                                         frag->page_offset,
2107                                         buffer_info->length,
2108                                         PCI_DMA_TODEVICE);
2109                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2110                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2111                         ATL1C_PCIMAP_TODEVICE);
2112                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2113                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2114         }
2115
2116         /* The last tpd */
2117         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2118         /* The last buffer info contain the skb address,
2119            so it will be free after unmap */
2120         buffer_info->skb = skb;
2121 }
2122
2123 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2124                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2125 {
2126         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2127         u32 prod_data;
2128
2129         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2130         switch (type) {
2131         case atl1c_trans_high:
2132                 prod_data &= 0xFFFF0000;
2133                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2134                 break;
2135         case atl1c_trans_normal:
2136                 prod_data &= 0x0000FFFF;
2137                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2138                 break;
2139         default:
2140                 break;
2141         }
2142         wmb();
2143         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2144 }
2145
2146 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2147                                           struct net_device *netdev)
2148 {
2149         struct atl1c_adapter *adapter = netdev_priv(netdev);
2150         unsigned long flags;
2151         u16 tpd_req = 1;
2152         struct atl1c_tpd_desc *tpd;
2153         enum atl1c_trans_queue type = atl1c_trans_normal;
2154
2155         if (test_bit(__AT_DOWN, &adapter->flags)) {
2156                 dev_kfree_skb_any(skb);
2157                 return NETDEV_TX_OK;
2158         }
2159
2160         tpd_req = atl1c_cal_tpd_req(skb);
2161         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2162                 if (netif_msg_pktdata(adapter))
2163                         dev_info(&adapter->pdev->dev, "tx locked\n");
2164                 return NETDEV_TX_LOCKED;
2165         }
2166         if (skb->mark == 0x01)
2167                 type = atl1c_trans_high;
2168         else
2169                 type = atl1c_trans_normal;
2170
2171         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2172                 /* no enough descriptor, just stop queue */
2173                 netif_stop_queue(netdev);
2174                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2175                 return NETDEV_TX_BUSY;
2176         }
2177
2178         tpd = atl1c_get_tpd(adapter, type);
2179
2180         /* do TSO and check sum */
2181         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2182                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2183                 dev_kfree_skb_any(skb);
2184                 return NETDEV_TX_OK;
2185         }
2186
2187         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2188                 u16 vlan = vlan_tx_tag_get(skb);
2189                 __le16 tag;
2190
2191                 vlan = cpu_to_le16(vlan);
2192                 AT_VLAN_TO_TAG(vlan, tag);
2193                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2194                 tpd->vlan_tag = tag;
2195         }
2196
2197         if (skb_network_offset(skb) != ETH_HLEN)
2198                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2199
2200         atl1c_tx_map(adapter, skb, tpd, type);
2201         atl1c_tx_queue(adapter, skb, tpd, type);
2202
2203         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2204         return NETDEV_TX_OK;
2205 }
2206
2207 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2208 {
2209         struct net_device *netdev = adapter->netdev;
2210
2211         free_irq(adapter->pdev->irq, netdev);
2212
2213         if (adapter->have_msi)
2214                 pci_disable_msi(adapter->pdev);
2215 }
2216
2217 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2218 {
2219         struct pci_dev    *pdev   = adapter->pdev;
2220         struct net_device *netdev = adapter->netdev;
2221         int flags = 0;
2222         int err = 0;
2223
2224         adapter->have_msi = true;
2225         err = pci_enable_msi(adapter->pdev);
2226         if (err) {
2227                 if (netif_msg_ifup(adapter))
2228                         dev_err(&pdev->dev,
2229                                 "Unable to allocate MSI interrupt Error: %d\n",
2230                                 err);
2231                 adapter->have_msi = false;
2232         } else
2233                 netdev->irq = pdev->irq;
2234
2235         if (!adapter->have_msi)
2236                 flags |= IRQF_SHARED;
2237         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2238                         netdev->name, netdev);
2239         if (err) {
2240                 if (netif_msg_ifup(adapter))
2241                         dev_err(&pdev->dev,
2242                                 "Unable to allocate interrupt Error: %d\n",
2243                                 err);
2244                 if (adapter->have_msi)
2245                         pci_disable_msi(adapter->pdev);
2246                 return err;
2247         }
2248         if (netif_msg_ifup(adapter))
2249                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2250         return err;
2251 }
2252
2253 int atl1c_up(struct atl1c_adapter *adapter)
2254 {
2255         struct net_device *netdev = adapter->netdev;
2256         int num;
2257         int err;
2258         int i;
2259
2260         netif_carrier_off(netdev);
2261         atl1c_init_ring_ptrs(adapter);
2262         atl1c_set_multi(netdev);
2263         atl1c_restore_vlan(adapter);
2264
2265         for (i = 0; i < adapter->num_rx_queues; i++) {
2266                 num = atl1c_alloc_rx_buffer(adapter, i);
2267                 if (unlikely(num == 0)) {
2268                         err = -ENOMEM;
2269                         goto err_alloc_rx;
2270                 }
2271         }
2272
2273         if (atl1c_configure(adapter)) {
2274                 err = -EIO;
2275                 goto err_up;
2276         }
2277
2278         err = atl1c_request_irq(adapter);
2279         if (unlikely(err))
2280                 goto err_up;
2281
2282         clear_bit(__AT_DOWN, &adapter->flags);
2283         napi_enable(&adapter->napi);
2284         atl1c_irq_enable(adapter);
2285         atl1c_check_link_status(adapter);
2286         netif_start_queue(netdev);
2287         return err;
2288
2289 err_up:
2290 err_alloc_rx:
2291         atl1c_clean_rx_ring(adapter);
2292         return err;
2293 }
2294
2295 void atl1c_down(struct atl1c_adapter *adapter)
2296 {
2297         struct net_device *netdev = adapter->netdev;
2298
2299         atl1c_del_timer(adapter);
2300         adapter->work_event = 0; /* clear all event */
2301         /* signal that we're down so the interrupt handler does not
2302          * reschedule our watchdog timer */
2303         set_bit(__AT_DOWN, &adapter->flags);
2304         netif_carrier_off(netdev);
2305         napi_disable(&adapter->napi);
2306         atl1c_irq_disable(adapter);
2307         atl1c_free_irq(adapter);
2308         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
2309         /* reset MAC to disable all RX/TX */
2310         atl1c_reset_mac(&adapter->hw);
2311         msleep(1);
2312
2313         adapter->link_speed = SPEED_0;
2314         adapter->link_duplex = -1;
2315         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2316         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2317         atl1c_clean_rx_ring(adapter);
2318 }
2319
2320 /*
2321  * atl1c_open - Called when a network interface is made active
2322  * @netdev: network interface device structure
2323  *
2324  * Returns 0 on success, negative value on failure
2325  *
2326  * The open entry point is called when a network interface is made
2327  * active by the system (IFF_UP).  At this point all resources needed
2328  * for transmit and receive operations are allocated, the interrupt
2329  * handler is registered with the OS, the watchdog timer is started,
2330  * and the stack is notified that the interface is ready.
2331  */
2332 static int atl1c_open(struct net_device *netdev)
2333 {
2334         struct atl1c_adapter *adapter = netdev_priv(netdev);
2335         int err;
2336
2337         /* disallow open during test */
2338         if (test_bit(__AT_TESTING, &adapter->flags))
2339                 return -EBUSY;
2340
2341         /* allocate rx/tx dma buffer & descriptors */
2342         err = atl1c_setup_ring_resources(adapter);
2343         if (unlikely(err))
2344                 return err;
2345
2346         err = atl1c_up(adapter);
2347         if (unlikely(err))
2348                 goto err_up;
2349
2350         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2351                 u32 phy_data;
2352
2353                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2354                 phy_data |= MDIO_AP_EN;
2355                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2356         }
2357         return 0;
2358
2359 err_up:
2360         atl1c_free_irq(adapter);
2361         atl1c_free_ring_resources(adapter);
2362         atl1c_reset_mac(&adapter->hw);
2363         return err;
2364 }
2365
2366 /*
2367  * atl1c_close - Disables a network interface
2368  * @netdev: network interface device structure
2369  *
2370  * Returns 0, this is not allowed to fail
2371  *
2372  * The close entry point is called when an interface is de-activated
2373  * by the OS.  The hardware is still under the drivers control, but
2374  * needs to be disabled.  A global MAC reset is issued to stop the
2375  * hardware, and all transmit and receive resources are freed.
2376  */
2377 static int atl1c_close(struct net_device *netdev)
2378 {
2379         struct atl1c_adapter *adapter = netdev_priv(netdev);
2380
2381         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2382         atl1c_down(adapter);
2383         atl1c_free_ring_resources(adapter);
2384         return 0;
2385 }
2386
2387 static int atl1c_suspend(struct pci_dev *pdev, pm_message_t state)
2388 {
2389         struct net_device *netdev = pci_get_drvdata(pdev);
2390         struct atl1c_adapter *adapter = netdev_priv(netdev);
2391         struct atl1c_hw *hw = &adapter->hw;
2392         u32 ctrl;
2393         u32 mac_ctrl_data;
2394         u32 master_ctrl_data;
2395         u32 wol_ctrl_data = 0;
2396         u16 mii_bmsr_data;
2397         u16 save_autoneg_advertised;
2398         u16 mii_intr_status_data;
2399         u32 wufc = adapter->wol;
2400         u32 i;
2401         int retval = 0;
2402
2403         if (netif_running(netdev)) {
2404                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2405                 atl1c_down(adapter);
2406         }
2407         netif_device_detach(netdev);
2408         atl1c_disable_l0s_l1(hw);
2409         retval = pci_save_state(pdev);
2410         if (retval)
2411                 return retval;
2412         if (wufc) {
2413                 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2414                 master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2415
2416                 /* get link status */
2417                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2418                 atl1c_read_phy_reg(hw, MII_BMSR, (u16 *)&mii_bmsr_data);
2419                 save_autoneg_advertised = hw->autoneg_advertised;
2420                 hw->autoneg_advertised = ADVERTISED_10baseT_Half;
2421                 if (atl1c_restart_autoneg(hw) != 0)
2422                         if (netif_msg_link(adapter))
2423                                 dev_warn(&pdev->dev, "phy autoneg failed\n");
2424                 hw->phy_configured = false; /* re-init PHY when resume */
2425                 hw->autoneg_advertised = save_autoneg_advertised;
2426                 /* turn on magic packet wol */
2427                 if (wufc & AT_WUFC_MAG)
2428                         wol_ctrl_data = WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2429
2430                 if (wufc & AT_WUFC_LNKC) {
2431                         for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
2432                                 msleep(100);
2433                                 atl1c_read_phy_reg(hw, MII_BMSR,
2434                                         (u16 *)&mii_bmsr_data);
2435                                 if (mii_bmsr_data & BMSR_LSTATUS)
2436                                         break;
2437                         }
2438                         if ((mii_bmsr_data & BMSR_LSTATUS) == 0)
2439                                 if (netif_msg_link(adapter))
2440                                         dev_warn(&pdev->dev,
2441                                                 "%s: Link may change"
2442                                                 "when suspend\n",
2443                                                 atl1c_driver_name);
2444                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2445                         /* only link up can wake up */
2446                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2447                                 if (netif_msg_link(adapter))
2448                                         dev_err(&pdev->dev,
2449                                                 "%s: read write phy "
2450                                                 "register failed.\n",
2451                                                 atl1c_driver_name);
2452                                 goto wol_dis;
2453                         }
2454                 }
2455                 /* clear phy interrupt */
2456                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2457                 /* Config MAC Ctrl register */
2458                 mac_ctrl_data = MAC_CTRL_RX_EN;
2459                 /* set to 10/100M halt duplex */
2460                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2461                 mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2462                                  MAC_CTRL_PRMLEN_MASK) <<
2463                                  MAC_CTRL_PRMLEN_SHIFT);
2464
2465                 if (adapter->vlgrp)
2466                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2467
2468                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2469                 if (wufc & AT_WUFC_MAG)
2470                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2471
2472                 if (netif_msg_hw(adapter))
2473                         dev_dbg(&pdev->dev,
2474                                 "%s: suspend MAC=0x%x\n",
2475                                 atl1c_driver_name, mac_ctrl_data);
2476                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2477                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2478                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2479
2480                 /* pcie patch */
2481                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2482                 ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2483                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2484
2485                 pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
2486                 goto suspend_exit;
2487         }
2488 wol_dis:
2489
2490         /* WOL disabled */
2491         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2492
2493         /* pcie patch */
2494         AT_READ_REG(hw, REG_PCIE_PHYMISC, &ctrl);
2495         ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2496         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
2497
2498         atl1c_phy_disable(hw);
2499         hw->phy_configured = false; /* re-init PHY when resume */
2500
2501         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
2502 suspend_exit:
2503
2504         pci_disable_device(pdev);
2505         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2506
2507         return 0;
2508 }
2509
2510 static int atl1c_resume(struct pci_dev *pdev)
2511 {
2512         struct net_device *netdev = pci_get_drvdata(pdev);
2513         struct atl1c_adapter *adapter = netdev_priv(netdev);
2514
2515         pci_set_power_state(pdev, PCI_D0);
2516         pci_restore_state(pdev);
2517         pci_enable_wake(pdev, PCI_D3hot, 0);
2518         pci_enable_wake(pdev, PCI_D3cold, 0);
2519
2520         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2521
2522         atl1c_phy_reset(&adapter->hw);
2523         atl1c_reset_mac(&adapter->hw);
2524         netif_device_attach(netdev);
2525         if (netif_running(netdev))
2526                 atl1c_up(adapter);
2527
2528         return 0;
2529 }
2530
2531 static void atl1c_shutdown(struct pci_dev *pdev)
2532 {
2533         atl1c_suspend(pdev, PMSG_SUSPEND);
2534 }
2535
2536 static const struct net_device_ops atl1c_netdev_ops = {
2537         .ndo_open               = atl1c_open,
2538         .ndo_stop               = atl1c_close,
2539         .ndo_validate_addr      = eth_validate_addr,
2540         .ndo_start_xmit         = atl1c_xmit_frame,
2541         .ndo_set_mac_address    = atl1c_set_mac_addr,
2542         .ndo_set_multicast_list = atl1c_set_multi,
2543         .ndo_change_mtu         = atl1c_change_mtu,
2544         .ndo_do_ioctl           = atl1c_ioctl,
2545         .ndo_tx_timeout         = atl1c_tx_timeout,
2546         .ndo_get_stats          = atl1c_get_stats,
2547         .ndo_vlan_rx_register   = atl1c_vlan_rx_register,
2548 #ifdef CONFIG_NET_POLL_CONTROLLER
2549         .ndo_poll_controller    = atl1c_netpoll,
2550 #endif
2551 };
2552
2553 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2554 {
2555         SET_NETDEV_DEV(netdev, &pdev->dev);
2556         pci_set_drvdata(pdev, netdev);
2557
2558         netdev->irq  = pdev->irq;
2559         netdev->netdev_ops = &atl1c_netdev_ops;
2560         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2561         atl1c_set_ethtool_ops(netdev);
2562
2563         /* TODO: add when ready */
2564         netdev->features =      NETIF_F_SG         |
2565                                 NETIF_F_HW_CSUM    |
2566                                 NETIF_F_HW_VLAN_TX |
2567                                 NETIF_F_HW_VLAN_RX |
2568                                 NETIF_F_TSO        |
2569                                 NETIF_F_TSO6;
2570         return 0;
2571 }
2572
2573 /*
2574  * atl1c_probe - Device Initialization Routine
2575  * @pdev: PCI device information struct
2576  * @ent: entry in atl1c_pci_tbl
2577  *
2578  * Returns 0 on success, negative on failure
2579  *
2580  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2581  * The OS initialization, configuring of the adapter private structure,
2582  * and a hardware reset occur.
2583  */
2584 static int __devinit atl1c_probe(struct pci_dev *pdev,
2585                                  const struct pci_device_id *ent)
2586 {
2587         struct net_device *netdev;
2588         struct atl1c_adapter *adapter;
2589         static int cards_found;
2590
2591         int err = 0;
2592
2593         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2594         err = pci_enable_device_mem(pdev);
2595         if (err) {
2596                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2597                 return err;
2598         }
2599
2600         /*
2601          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2602          * shared register for the high 32 bits, so only a single, aligned,
2603          * 4 GB physical address range can be used at a time.
2604          *
2605          * Supporting 64-bit DMA on this hardware is more trouble than it's
2606          * worth.  It is far easier to limit to 32-bit DMA than update
2607          * various kernel subsystems to support the mechanics required by a
2608          * fixed-high-32-bit system.
2609          */
2610         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2611             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2612                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2613                 goto err_dma;
2614         }
2615
2616         err = pci_request_regions(pdev, atl1c_driver_name);
2617         if (err) {
2618                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2619                 goto err_pci_reg;
2620         }
2621
2622         pci_set_master(pdev);
2623
2624         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2625         if (netdev == NULL) {
2626                 err = -ENOMEM;
2627                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2628                 goto err_alloc_etherdev;
2629         }
2630
2631         err = atl1c_init_netdev(netdev, pdev);
2632         if (err) {
2633                 dev_err(&pdev->dev, "init netdevice failed\n");
2634                 goto err_init_netdev;
2635         }
2636         adapter = netdev_priv(netdev);
2637         adapter->bd_number = cards_found;
2638         adapter->netdev = netdev;
2639         adapter->pdev = pdev;
2640         adapter->hw.adapter = adapter;
2641         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2642         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2643         if (!adapter->hw.hw_addr) {
2644                 err = -EIO;
2645                 dev_err(&pdev->dev, "cannot map device registers\n");
2646                 goto err_ioremap;
2647         }
2648         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2649
2650         /* init mii data */
2651         adapter->mii.dev = netdev;
2652         adapter->mii.mdio_read  = atl1c_mdio_read;
2653         adapter->mii.mdio_write = atl1c_mdio_write;
2654         adapter->mii.phy_id_mask = 0x1f;
2655         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2656         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2657         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2658                         (unsigned long)adapter);
2659         /* setup the private structure */
2660         err = atl1c_sw_init(adapter);
2661         if (err) {
2662                 dev_err(&pdev->dev, "net device private data init failed\n");
2663                 goto err_sw_init;
2664         }
2665         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2666                         ATL1C_PCIE_PHY_RESET);
2667
2668         /* Init GPHY as early as possible due to power saving issue  */
2669         atl1c_phy_reset(&adapter->hw);
2670
2671         err = atl1c_reset_mac(&adapter->hw);
2672         if (err) {
2673                 err = -EIO;
2674                 goto err_reset;
2675         }
2676
2677         device_init_wakeup(&pdev->dev, 1);
2678         /* reset the controller to
2679          * put the device in a known good starting state */
2680         err = atl1c_phy_init(&adapter->hw);
2681         if (err) {
2682                 err = -EIO;
2683                 goto err_reset;
2684         }
2685         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2686                 err = -EIO;
2687                 dev_err(&pdev->dev, "get mac address failed\n");
2688                 goto err_eeprom;
2689         }
2690         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2691         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2692         if (netif_msg_probe(adapter))
2693                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2694                         adapter->hw.mac_addr);
2695
2696         atl1c_hw_set_mac_addr(&adapter->hw);
2697         INIT_WORK(&adapter->common_task, atl1c_common_task);
2698         adapter->work_event = 0;
2699         err = register_netdev(netdev);
2700         if (err) {
2701                 dev_err(&pdev->dev, "register netdevice failed\n");
2702                 goto err_register;
2703         }
2704
2705         if (netif_msg_probe(adapter))
2706                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2707         cards_found++;
2708         return 0;
2709
2710 err_reset:
2711 err_register:
2712 err_sw_init:
2713 err_eeprom:
2714         iounmap(adapter->hw.hw_addr);
2715 err_init_netdev:
2716 err_ioremap:
2717         free_netdev(netdev);
2718 err_alloc_etherdev:
2719         pci_release_regions(pdev);
2720 err_pci_reg:
2721 err_dma:
2722         pci_disable_device(pdev);
2723         return err;
2724 }
2725
2726 /*
2727  * atl1c_remove - Device Removal Routine
2728  * @pdev: PCI device information struct
2729  *
2730  * atl1c_remove is called by the PCI subsystem to alert the driver
2731  * that it should release a PCI device.  The could be caused by a
2732  * Hot-Plug event, or because the driver is going to be removed from
2733  * memory.
2734  */
2735 static void __devexit atl1c_remove(struct pci_dev *pdev)
2736 {
2737         struct net_device *netdev = pci_get_drvdata(pdev);
2738         struct atl1c_adapter *adapter = netdev_priv(netdev);
2739
2740         unregister_netdev(netdev);
2741         atl1c_phy_disable(&adapter->hw);
2742
2743         iounmap(adapter->hw.hw_addr);
2744
2745         pci_release_regions(pdev);
2746         pci_disable_device(pdev);
2747         free_netdev(netdev);
2748 }
2749
2750 /*
2751  * atl1c_io_error_detected - called when PCI error is detected
2752  * @pdev: Pointer to PCI device
2753  * @state: The current pci connection state
2754  *
2755  * This function is called after a PCI bus error affecting
2756  * this device has been detected.
2757  */
2758 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2759                                                 pci_channel_state_t state)
2760 {
2761         struct net_device *netdev = pci_get_drvdata(pdev);
2762         struct atl1c_adapter *adapter = netdev_priv(netdev);
2763
2764         netif_device_detach(netdev);
2765
2766         if (state == pci_channel_io_perm_failure)
2767                 return PCI_ERS_RESULT_DISCONNECT;
2768
2769         if (netif_running(netdev))
2770                 atl1c_down(adapter);
2771
2772         pci_disable_device(pdev);
2773
2774         /* Request a slot slot reset. */
2775         return PCI_ERS_RESULT_NEED_RESET;
2776 }
2777
2778 /*
2779  * atl1c_io_slot_reset - called after the pci bus has been reset.
2780  * @pdev: Pointer to PCI device
2781  *
2782  * Restart the card from scratch, as if from a cold-boot. Implementation
2783  * resembles the first-half of the e1000_resume routine.
2784  */
2785 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2786 {
2787         struct net_device *netdev = pci_get_drvdata(pdev);
2788         struct atl1c_adapter *adapter = netdev_priv(netdev);
2789
2790         if (pci_enable_device(pdev)) {
2791                 if (netif_msg_hw(adapter))
2792                         dev_err(&pdev->dev,
2793                                 "Cannot re-enable PCI device after reset\n");
2794                 return PCI_ERS_RESULT_DISCONNECT;
2795         }
2796         pci_set_master(pdev);
2797
2798         pci_enable_wake(pdev, PCI_D3hot, 0);
2799         pci_enable_wake(pdev, PCI_D3cold, 0);
2800
2801         atl1c_reset_mac(&adapter->hw);
2802
2803         return PCI_ERS_RESULT_RECOVERED;
2804 }
2805
2806 /*
2807  * atl1c_io_resume - called when traffic can start flowing again.
2808  * @pdev: Pointer to PCI device
2809  *
2810  * This callback is called when the error recovery driver tells us that
2811  * its OK to resume normal operation. Implementation resembles the
2812  * second-half of the atl1c_resume routine.
2813  */
2814 static void atl1c_io_resume(struct pci_dev *pdev)
2815 {
2816         struct net_device *netdev = pci_get_drvdata(pdev);
2817         struct atl1c_adapter *adapter = netdev_priv(netdev);
2818
2819         if (netif_running(netdev)) {
2820                 if (atl1c_up(adapter)) {
2821                         if (netif_msg_hw(adapter))
2822                                 dev_err(&pdev->dev,
2823                                         "Cannot bring device back up after reset\n");
2824                         return;
2825                 }
2826         }
2827
2828         netif_device_attach(netdev);
2829 }
2830
2831 static struct pci_error_handlers atl1c_err_handler = {
2832         .error_detected = atl1c_io_error_detected,
2833         .slot_reset = atl1c_io_slot_reset,
2834         .resume = atl1c_io_resume,
2835 };
2836
2837 static struct pci_driver atl1c_driver = {
2838         .name     = atl1c_driver_name,
2839         .id_table = atl1c_pci_tbl,
2840         .probe    = atl1c_probe,
2841         .remove   = __devexit_p(atl1c_remove),
2842         /* Power Managment Hooks */
2843         .suspend  = atl1c_suspend,
2844         .resume   = atl1c_resume,
2845         .shutdown = atl1c_shutdown,
2846         .err_handler = &atl1c_err_handler
2847 };
2848
2849 /*
2850  * atl1c_init_module - Driver Registration Routine
2851  *
2852  * atl1c_init_module is the first routine called when the driver is
2853  * loaded. All it does is register with the PCI subsystem.
2854  */
2855 static int __init atl1c_init_module(void)
2856 {
2857         return pci_register_driver(&atl1c_driver);
2858 }
2859
2860 /*
2861  * atl1c_exit_module - Driver Exit Cleanup Routine
2862  *
2863  * atl1c_exit_module is called just before the driver is removed
2864  * from memory.
2865  */
2866 static void __exit atl1c_exit_module(void)
2867 {
2868         pci_unregister_driver(&atl1c_driver);
2869 }
2870
2871 module_init(atl1c_init_module);
2872 module_exit(atl1c_exit_module);