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