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 "1.0.1.0-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 #define PCI_DEVICE_ID_ATHEROS_L1D_2_0   0x1083 /* AR8151 v2.0 Gigabit 1000 */
  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         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  52         /* required last entry */
  53         { 0 }
  54 };
  55 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  56
  57 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
  58 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  59 MODULE_LICENSE("GPL");
  60 MODULE_VERSION(ATL1C_DRV_VERSION);
  61
  62 static int atl1c_stop_mac(struct atl1c_hw *hw);
  63 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
  64 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
  65 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  66 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
  67 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
  68 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
  69                    int *work_done, int work_to_do);
  70 static int atl1c_up(struct atl1c_adapter *adapter);
  71 static void atl1c_down(struct atl1c_adapter *adapter);
  72
  73 static const u16 atl1c_pay_load_size[] = {
  74         128, 256, 512, 1024, 2048, 4096,
  75 };
  76
  77 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
  78 {
  79         REG_MB_RFD0_PROD_IDX,
  80         REG_MB_RFD1_PROD_IDX,
  81         REG_MB_RFD2_PROD_IDX,
  82         REG_MB_RFD3_PROD_IDX
  83 };
  84
  85 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  86 {
  87         REG_RFD0_HEAD_ADDR_LO,
  88         REG_RFD1_HEAD_ADDR_LO,
  89         REG_RFD2_HEAD_ADDR_LO,
  90         REG_RFD3_HEAD_ADDR_LO
  91 };
  92
  93 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  94 {
  95         REG_RRD0_HEAD_ADDR_LO,
  96         REG_RRD1_HEAD_ADDR_LO,
  97         REG_RRD2_HEAD_ADDR_LO,
  98         REG_RRD3_HEAD_ADDR_LO
  99 };
 100
 101 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
 102         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
 103 static void atl1c_pcie_patch(struct atl1c_hw *hw)
 104 {
 105         u32 data;
 106
 107         AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
 108         data |= PCIE_PHYMISC_FORCE_RCV_DET;
 109         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
 110
 111         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
 112                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
 113
 114                 data &= ~(PCIE_PHYMISC2_SERDES_CDR_MASK <<
 115                         PCIE_PHYMISC2_SERDES_CDR_SHIFT);
 116                 data |= 3 << PCIE_PHYMISC2_SERDES_CDR_SHIFT;
 117                 data &= ~(PCIE_PHYMISC2_SERDES_TH_MASK <<
 118                         PCIE_PHYMISC2_SERDES_TH_SHIFT);
 119                 data |= 3 << PCIE_PHYMISC2_SERDES_TH_SHIFT;
 120                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
 121         }
 122 }
 123
 124 /* FIXME: no need any more ? */
 125 /*
 126  * atl1c_init_pcie - init PCIE module
 127  */
 128 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 129 {
 130         u32 data;
 131         u32 pci_cmd;
 132         struct pci_dev *pdev = hw->adapter->pdev;
 133
 134         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 135         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 136         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 137                 PCI_COMMAND_IO);
 138         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 139
 140         /*
 141          * Clear any PowerSaveing Settings
 142          */
 143         pci_enable_wake(pdev, PCI_D3hot, 0);
 144         pci_enable_wake(pdev, PCI_D3cold, 0);
 145
 146         /*
 147          * Mask some pcie error bits
 148          */
 149         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
 150         data &= ~PCIE_UC_SERVRITY_DLP;
 151         data &= ~PCIE_UC_SERVRITY_FCP;
 152         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
 153
 154         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 155         data &= ~LTSSM_ID_EN_WRO;
 156         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 157
 158         atl1c_pcie_patch(hw);
 159         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 160                 atl1c_disable_l0s_l1(hw);
 161         if (flag & ATL1C_PCIE_PHY_RESET)
 162                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 163         else
 164                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 165                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 166
 167         msleep(5);
 168 }
 169
 170 /*
 171  * atl1c_irq_enable - Enable default interrupt generation settings
 172  * @adapter: board private structure
 173  */
 174 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 175 {
 176         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 177                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 178                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 179                 AT_WRITE_FLUSH(&adapter->hw);
 180         }
 181 }
 182
 183 /*
 184  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 185  * @adapter: board private structure
 186  */
 187 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 188 {
 189         atomic_inc(&adapter->irq_sem);
 190         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 191         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 192         AT_WRITE_FLUSH(&adapter->hw);
 193         synchronize_irq(adapter->pdev->irq);
 194 }
 195
 196 /*
 197  * atl1c_irq_reset - reset interrupt confiure on the NIC
 198  * @adapter: board private structure
 199  */
 200 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 201 {
 202         atomic_set(&adapter->irq_sem, 1);
 203         atl1c_irq_enable(adapter);
 204 }
 205
 206 /*
 207  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 208  * of the idle status register until the device is actually idle
 209  */
 210 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
 211 {
 212         int timeout;
 213         u32 data;
 214
 215         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 216                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 217                 if ((data & IDLE_STATUS_MASK) == 0)
 218                         return 0;
 219                 msleep(1);
 220         }
 221         return data;
 222 }
 223
 224 /*
 225  * atl1c_phy_config - Timer Call-back
 226  * @data: pointer to netdev cast into an unsigned long
 227  */
 228 static void atl1c_phy_config(unsigned long data)
 229 {
 230         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 231         struct atl1c_hw *hw = &adapter->hw;
 232         unsigned long flags;
 233
 234         spin_lock_irqsave(&adapter->mdio_lock, flags);
 235         atl1c_restart_autoneg(hw);
 236         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 237 }
 238
 239 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 240 {
 241         WARN_ON(in_interrupt());
 242         atl1c_down(adapter);
 243         atl1c_up(adapter);
 244         clear_bit(__AT_RESETTING, &adapter->flags);
 245 }
 246
 247 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 248 {
 249         struct atl1c_hw *hw = &adapter->hw;
 250         struct net_device *netdev = adapter->netdev;
 251         struct pci_dev    *pdev   = adapter->pdev;
 252         int err;
 253         unsigned long flags;
 254         u16 speed, duplex, phy_data;
 255
 256         spin_lock_irqsave(&adapter->mdio_lock, flags);
 257         /* MII_BMSR must read twise */
 258         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 259         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 260         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 261
 262         if ((phy_data & BMSR_LSTATUS) == 0) {
 263                 /* link down */
 264                 hw->hibernate = true;
 265                 if (atl1c_stop_mac(hw) != 0)
 266                         if (netif_msg_hw(adapter))
 267                                 dev_warn(&pdev->dev, "stop mac failed\n");
 268                 atl1c_set_aspm(hw, false);
 269                 netif_carrier_off(netdev);
 270                 netif_stop_queue(netdev);
 271                 atl1c_phy_reset(hw);
 272                 atl1c_phy_init(&adapter->hw);
 273         } else {
 274                 /* Link Up */
 275                 hw->hibernate = false;
 276                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 277                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 278                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 279                 if (unlikely(err))
 280                         return;
 281                 /* link result is our setting */
 282                 if (adapter->link_speed != speed ||
 283                     adapter->link_duplex != duplex) {
 284                         adapter->link_speed  = speed;
 285                         adapter->link_duplex = duplex;
 286                         atl1c_set_aspm(hw, true);
 287                         atl1c_enable_tx_ctrl(hw);
 288                         atl1c_enable_rx_ctrl(hw);
 289                         atl1c_setup_mac_ctrl(adapter);
 290                         if (netif_msg_link(adapter))
 291                                 dev_info(&pdev->dev,
 292                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 293                                         atl1c_driver_name, netdev->name,
 294                                         adapter->link_speed,
 295                                         adapter->link_duplex == FULL_DUPLEX ?
 296                                         "Full Duplex" : "Half Duplex");
 297                 }
 298                 if (!netif_carrier_ok(netdev))
 299                         netif_carrier_on(netdev);
 300         }
 301 }
 302
 303 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 304 {
 305         struct net_device *netdev = adapter->netdev;
 306         struct pci_dev    *pdev   = adapter->pdev;
 307         u16 phy_data;
 308         u16 link_up;
 309
 310         spin_lock(&adapter->mdio_lock);
 311         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 312         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 313         spin_unlock(&adapter->mdio_lock);
 314         link_up = phy_data & BMSR_LSTATUS;
 315         /* notify upper layer link down ASAP */
 316         if (!link_up) {
 317                 if (netif_carrier_ok(netdev)) {
 318                         /* old link state: Up */
 319                         netif_carrier_off(netdev);
 320                         if (netif_msg_link(adapter))
 321                                 dev_info(&pdev->dev,
 322                                         "%s: %s NIC Link is Down\n",
 323                                         atl1c_driver_name, netdev->name);
 324                         adapter->link_speed = SPEED_0;
 325                 }
 326         }
 327
 328         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 329         schedule_work(&adapter->common_task);
 330 }
 331
 332 static void atl1c_common_task(struct work_struct *work)
 333 {
 334         struct atl1c_adapter *adapter;
 335         struct net_device *netdev;
 336
 337         adapter = container_of(work, struct atl1c_adapter, common_task);
 338         netdev = adapter->netdev;
 339
 340         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 341                 netif_device_detach(netdev);
 342                 atl1c_down(adapter);
 343                 atl1c_up(adapter);
 344                 netif_device_attach(netdev);
 345         }
 346
 347         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 348                 &adapter->work_event))
 349                 atl1c_check_link_status(adapter);
 350 }
 351
 352
 353 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 354 {
 355         del_timer_sync(&adapter->phy_config_timer);
 356 }
 357
 358
 359 /*
 360  * atl1c_tx_timeout - Respond to a Tx Hang
 361  * @netdev: network interface device structure
 362  */
 363 static void atl1c_tx_timeout(struct net_device *netdev)
 364 {
 365         struct atl1c_adapter *adapter = netdev_priv(netdev);
 366
 367         /* Do the reset outside of interrupt context */
 368         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 369         schedule_work(&adapter->common_task);
 370 }
 371
 372 /*
 373  * atl1c_set_multi - Multicast and Promiscuous mode set
 374  * @netdev: network interface device structure
 375  *
 376  * The set_multi entry point is called whenever the multicast address
 377  * list or the network interface flags are updated.  This routine is
 378  * responsible for configuring the hardware for proper multicast,
 379  * promiscuous mode, and all-multi behavior.
 380  */
 381 static void atl1c_set_multi(struct net_device *netdev)
 382 {
 383         struct atl1c_adapter *adapter = netdev_priv(netdev);
 384         struct atl1c_hw *hw = &adapter->hw;
 385         struct netdev_hw_addr *ha;
 386         u32 mac_ctrl_data;
 387         u32 hash_value;
 388
 389         /* Check for Promiscuous and All Multicast modes */
 390         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 391
 392         if (netdev->flags & IFF_PROMISC) {
 393                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 394         } else if (netdev->flags & IFF_ALLMULTI) {
 395                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 396                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 397         } else {
 398                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 399         }
 400
 401         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 402
 403         /* clear the old settings from the multicast hash table */
 404         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 405         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 406
 407         /* comoute mc addresses' hash value ,and put it into hash table */
 408         netdev_for_each_mc_addr(ha, netdev) {
 409                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 410                 atl1c_hash_set(hw, hash_value);
 411         }
 412 }
 413
 414 static void atl1c_vlan_rx_register(struct net_device *netdev,
 415                                    struct vlan_group *grp)
 416 {
 417         struct atl1c_adapter *adapter = netdev_priv(netdev);
 418         struct pci_dev *pdev = adapter->pdev;
 419         u32 mac_ctrl_data = 0;
 420
 421         if (netif_msg_pktdata(adapter))
 422                 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
 423
 424         atl1c_irq_disable(adapter);
 425
 426         adapter->vlgrp = grp;
 427         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 428
 429         if (grp) {
 430                 /* enable VLAN tag insert/strip */
 431                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 432         } else {
 433                 /* disable VLAN tag insert/strip */
 434                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 435         }
 436
 437         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 438         atl1c_irq_enable(adapter);
 439 }
 440
 441 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 442 {
 443         struct pci_dev *pdev = adapter->pdev;
 444
 445         if (netif_msg_pktdata(adapter))
 446                 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
 447         atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 448 }
 449 /*
 450  * atl1c_set_mac - Change the Ethernet Address of the NIC
 451  * @netdev: network interface device structure
 452  * @p: pointer to an address structure
 453  *
 454  * Returns 0 on success, negative on failure
 455  */
 456 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 457 {
 458         struct atl1c_adapter *adapter = netdev_priv(netdev);
 459         struct sockaddr *addr = p;
 460
 461         if (!is_valid_ether_addr(addr->sa_data))
 462                 return -EADDRNOTAVAIL;
 463
 464         if (netif_running(netdev))
 465                 return -EBUSY;
 466
 467         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 468         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 469
 470         atl1c_hw_set_mac_addr(&adapter->hw);
 471
 472         return 0;
 473 }
 474
 475 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 476                                 struct net_device *dev)
 477 {
 478         int mtu = dev->mtu;
 479
 480         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 481                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 482 }
 483
 484 static u32 atl1c_fix_features(struct net_device *netdev, u32 features)
 485 {
 486         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 487                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 488
 489         return features;
 490 }
 491
 492 /*
 493  * atl1c_change_mtu - Change the Maximum Transfer Unit
 494  * @netdev: network interface device structure
 495  * @new_mtu: new value for maximum frame size
 496  *
 497  * Returns 0 on success, negative on failure
 498  */
 499 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 500 {
 501         struct atl1c_adapter *adapter = netdev_priv(netdev);
 502         int old_mtu   = netdev->mtu;
 503         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 504
 505         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 506                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 507                 if (netif_msg_link(adapter))
 508                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 509                 return -EINVAL;
 510         }
 511         /* set MTU */
 512         if (old_mtu != new_mtu && netif_running(netdev)) {
 513                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 514                         msleep(1);
 515                 netdev->mtu = new_mtu;
 516                 adapter->hw.max_frame_size = new_mtu;
 517                 atl1c_set_rxbufsize(adapter, netdev);
 518                 atl1c_down(adapter);
 519                 netdev_update_features(netdev);
 520                 atl1c_up(adapter);
 521                 clear_bit(__AT_RESETTING, &adapter->flags);
 522                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 523                         u32 phy_data;
 524
 525                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 526                         phy_data |= 0x10000000;
 527                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 528                 }
 529
 530         }
 531         return 0;
 532 }
 533
 534 /*
 535  *  caller should hold mdio_lock
 536  */
 537 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 538 {
 539         struct atl1c_adapter *adapter = netdev_priv(netdev);
 540         u16 result;
 541
 542         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 543         return result;
 544 }
 545
 546 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 547                              int reg_num, int val)
 548 {
 549         struct atl1c_adapter *adapter = netdev_priv(netdev);
 550
 551         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 552 }
 553
 554 /*
 555  * atl1c_mii_ioctl -
 556  * @netdev:
 557  * @ifreq:
 558  * @cmd:
 559  */
 560 static int atl1c_mii_ioctl(struct net_device *netdev,
 561                            struct ifreq *ifr, int cmd)
 562 {
 563         struct atl1c_adapter *adapter = netdev_priv(netdev);
 564         struct pci_dev *pdev = adapter->pdev;
 565         struct mii_ioctl_data *data = if_mii(ifr);
 566         unsigned long flags;
 567         int retval = 0;
 568
 569         if (!netif_running(netdev))
 570                 return -EINVAL;
 571
 572         spin_lock_irqsave(&adapter->mdio_lock, flags);
 573         switch (cmd) {
 574         case SIOCGMIIPHY:
 575                 data->phy_id = 0;
 576                 break;
 577
 578         case SIOCGMIIREG:
 579                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 580                                     &data->val_out)) {
 581                         retval = -EIO;
 582                         goto out;
 583                 }
 584                 break;
 585
 586         case SIOCSMIIREG:
 587                 if (data->reg_num & ~(0x1F)) {
 588                         retval = -EFAULT;
 589                         goto out;
 590                 }
 591
 592                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 593                                 data->reg_num, data->val_in);
 594                 if (atl1c_write_phy_reg(&adapter->hw,
 595                                      data->reg_num, data->val_in)) {
 596                         retval = -EIO;
 597                         goto out;
 598                 }
 599                 break;
 600
 601         default:
 602                 retval = -EOPNOTSUPP;
 603                 break;
 604         }
 605 out:
 606         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 607         return retval;
 608 }
 609
 610 /*
 611  * atl1c_ioctl -
 612  * @netdev:
 613  * @ifreq:
 614  * @cmd:
 615  */
 616 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 617 {
 618         switch (cmd) {
 619         case SIOCGMIIPHY:
 620         case SIOCGMIIREG:
 621         case SIOCSMIIREG:
 622                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 623         default:
 624                 return -EOPNOTSUPP;
 625         }
 626 }
 627
 628 /*
 629  * atl1c_alloc_queues - Allocate memory for all rings
 630  * @adapter: board private structure to initialize
 631  *
 632  */
 633 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 634 {
 635         return 0;
 636 }
 637
 638 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 639 {
 640         switch (hw->device_id) {
 641         case PCI_DEVICE_ID_ATTANSIC_L2C:
 642                 hw->nic_type = athr_l2c;
 643                 break;
 644         case PCI_DEVICE_ID_ATTANSIC_L1C:
 645                 hw->nic_type = athr_l1c;
 646                 break;
 647         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 648                 hw->nic_type = athr_l2c_b;
 649                 break;
 650         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 651                 hw->nic_type = athr_l2c_b2;
 652                 break;
 653         case PCI_DEVICE_ID_ATHEROS_L1D:
 654                 hw->nic_type = athr_l1d;
 655                 break;
 656         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 657                 hw->nic_type = athr_l1d_2;
 658                 break;
 659         default:
 660                 break;
 661         }
 662 }
 663
 664 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 665 {
 666         u32 phy_status_data;
 667         u32 link_ctrl_data;
 668
 669         atl1c_set_mac_type(hw);
 670         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 671         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 672
 673         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 674                          ATL1C_TXQ_MODE_ENHANCE;
 675         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 676                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 677         if (link_ctrl_data & LINK_CTRL_L1_EN)
 678                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 679         if (link_ctrl_data & LINK_CTRL_EXT_SYNC)
 680                 hw->ctrl_flags |= ATL1C_LINK_EXT_SYNC;
 681         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 682
 683         if (hw->nic_type == athr_l1c ||
 684             hw->nic_type == athr_l1d ||
 685             hw->nic_type == athr_l1d_2)
 686                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 687         return 0;
 688 }
 689 /*
 690  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 691  * @adapter: board private structure to initialize
 692  *
 693  * atl1c_sw_init initializes the Adapter private data structure.
 694  * Fields are initialized based on PCI device information and
 695  * OS network device settings (MTU size).
 696  */
 697 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 698 {
 699         struct atl1c_hw *hw   = &adapter->hw;
 700         struct pci_dev  *pdev = adapter->pdev;
 701         u32 revision;
 702
 703
 704         adapter->wol = 0;
 705         device_set_wakeup_enable(&pdev->dev, false);
 706         adapter->link_speed = SPEED_0;
 707         adapter->link_duplex = FULL_DUPLEX;
 708         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
 709         adapter->tpd_ring[0].count = 1024;
 710         adapter->rfd_ring[0].count = 512;
 711
 712         hw->vendor_id = pdev->vendor;
 713         hw->device_id = pdev->device;
 714         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 715         hw->subsystem_id = pdev->subsystem_device;
 716         AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
 717         hw->revision_id = revision & 0xFF;
 718         /* before link up, we assume hibernate is true */
 719         hw->hibernate = true;
 720         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 721         if (atl1c_setup_mac_funcs(hw) != 0) {
 722                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 723                 return -1;
 724         }
 725         hw->intr_mask = IMR_NORMAL_MASK;
 726         hw->phy_configured = false;
 727         hw->preamble_len = 7;
 728         hw->max_frame_size = adapter->netdev->mtu;
 729         if (adapter->num_rx_queues < 2) {
 730                 hw->rss_type = atl1c_rss_disable;
 731                 hw->rss_mode = atl1c_rss_mode_disable;
 732         } else {
 733                 hw->rss_type = atl1c_rss_ipv4;
 734                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
 735                 hw->rss_hash_bits = 16;
 736         }
 737         hw->autoneg_advertised = ADVERTISED_Autoneg;
 738         hw->indirect_tab = 0xE4E4E4E4;
 739         hw->base_cpu = 0;
 740
 741         hw->ict = 50000;                /* 100ms */
 742         hw->smb_timer = 200000;         /* 400ms */
 743         hw->cmb_tpd = 4;
 744         hw->cmb_tx_timer = 1;           /* 2 us  */
 745         hw->rx_imt = 200;
 746         hw->tx_imt = 1000;
 747
 748         hw->tpd_burst = 5;
 749         hw->rfd_burst = 8;
 750         hw->dma_order = atl1c_dma_ord_out;
 751         hw->dmar_block = atl1c_dma_req_1024;
 752         hw->dmaw_block = atl1c_dma_req_1024;
 753         hw->dmar_dly_cnt = 15;
 754         hw->dmaw_dly_cnt = 4;
 755
 756         if (atl1c_alloc_queues(adapter)) {
 757                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 758                 return -ENOMEM;
 759         }
 760         /* TODO */
 761         atl1c_set_rxbufsize(adapter, adapter->netdev);
 762         atomic_set(&adapter->irq_sem, 1);
 763         spin_lock_init(&adapter->mdio_lock);
 764         spin_lock_init(&adapter->tx_lock);
 765         set_bit(__AT_DOWN, &adapter->flags);
 766
 767         return 0;
 768 }
 769
 770 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 771                                 struct atl1c_buffer *buffer_info, int in_irq)
 772 {
 773         u16 pci_driection;
 774         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 775                 return;
 776         if (buffer_info->dma) {
 777                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 778                         pci_driection = PCI_DMA_FROMDEVICE;
 779                 else
 780                         pci_driection = PCI_DMA_TODEVICE;
 781
 782                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 783                         pci_unmap_single(pdev, buffer_info->dma,
 784                                         buffer_info->length, pci_driection);
 785                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 786                         pci_unmap_page(pdev, buffer_info->dma,
 787                                         buffer_info->length, pci_driection);
 788         }
 789         if (buffer_info->skb) {
 790                 if (in_irq)
 791                         dev_kfree_skb_irq(buffer_info->skb);
 792                 else
 793                         dev_kfree_skb(buffer_info->skb);
 794         }
 795         buffer_info->dma = 0;
 796         buffer_info->skb = NULL;
 797         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 798 }
 799 /*
 800  * atl1c_clean_tx_ring - Free Tx-skb
 801  * @adapter: board private structure
 802  */
 803 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 804                                 enum atl1c_trans_queue type)
 805 {
 806         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 807         struct atl1c_buffer *buffer_info;
 808         struct pci_dev *pdev = adapter->pdev;
 809         u16 index, ring_count;
 810
 811         ring_count = tpd_ring->count;
 812         for (index = 0; index < ring_count; index++) {
 813                 buffer_info = &tpd_ring->buffer_info[index];
 814                 atl1c_clean_buffer(pdev, buffer_info, 0);
 815         }
 816
 817         /* Zero out Tx-buffers */
 818         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 819                 ring_count);
 820         atomic_set(&tpd_ring->next_to_clean, 0);
 821         tpd_ring->next_to_use = 0;
 822 }
 823
 824 /*
 825  * atl1c_clean_rx_ring - Free rx-reservation skbs
 826  * @adapter: board private structure
 827  */
 828 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 829 {
 830         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 831         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 832         struct atl1c_buffer *buffer_info;
 833         struct pci_dev *pdev = adapter->pdev;
 834         int i, j;
 835
 836         for (i = 0; i < adapter->num_rx_queues; i++) {
 837                 for (j = 0; j < rfd_ring[i].count; j++) {
 838                         buffer_info = &rfd_ring[i].buffer_info[j];
 839                         atl1c_clean_buffer(pdev, buffer_info, 0);
 840                 }
 841                 /* zero out the descriptor ring */
 842                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
 843                 rfd_ring[i].next_to_clean = 0;
 844                 rfd_ring[i].next_to_use = 0;
 845                 rrd_ring[i].next_to_use = 0;
 846                 rrd_ring[i].next_to_clean = 0;
 847         }
 848 }
 849
 850 /*
 851  * Read / Write Ptr Initialize:
 852  */
 853 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 854 {
 855         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 856         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 857         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 858         struct atl1c_buffer *buffer_info;
 859         int i, j;
 860
 861         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 862                 tpd_ring[i].next_to_use = 0;
 863                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 864                 buffer_info = tpd_ring[i].buffer_info;
 865                 for (j = 0; j < tpd_ring->count; j++)
 866                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 867                                         ATL1C_BUFFER_FREE);
 868         }
 869         for (i = 0; i < adapter->num_rx_queues; i++) {
 870                 rfd_ring[i].next_to_use = 0;
 871                 rfd_ring[i].next_to_clean = 0;
 872                 rrd_ring[i].next_to_use = 0;
 873                 rrd_ring[i].next_to_clean = 0;
 874                 for (j = 0; j < rfd_ring[i].count; j++) {
 875                         buffer_info = &rfd_ring[i].buffer_info[j];
 876                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 877                 }
 878         }
 879 }
 880
 881 /*
 882  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 883  * @adapter: board private structure
 884  *
 885  * Free all transmit software resources
 886  */
 887 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 888 {
 889         struct pci_dev *pdev = adapter->pdev;
 890
 891         pci_free_consistent(pdev, adapter->ring_header.size,
 892                                         adapter->ring_header.desc,
 893                                         adapter->ring_header.dma);
 894         adapter->ring_header.desc = NULL;
 895
 896         /* Note: just free tdp_ring.buffer_info,
 897         *  it contain rfd_ring.buffer_info, do not double free */
 898         if (adapter->tpd_ring[0].buffer_info) {
 899                 kfree(adapter->tpd_ring[0].buffer_info);
 900                 adapter->tpd_ring[0].buffer_info = NULL;
 901         }
 902 }
 903
 904 /*
 905  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 906  * @adapter: board private structure
 907  *
 908  * Return 0 on success, negative on failure
 909  */
 910 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 911 {
 912         struct pci_dev *pdev = adapter->pdev;
 913         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 914         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 915         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 916         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 917         int num_rx_queues = adapter->num_rx_queues;
 918         int size;
 919         int i;
 920         int count = 0;
 921         int rx_desc_count = 0;
 922         u32 offset = 0;
 923
 924         rrd_ring[0].count = rfd_ring[0].count;
 925         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 926                 tpd_ring[i].count = tpd_ring[0].count;
 927
 928         for (i = 1; i < adapter->num_rx_queues; i++)
 929                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
 930
 931         /* 2 tpd queue, one high priority queue,
 932          * another normal priority queue */
 933         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 934                 rfd_ring->count * num_rx_queues);
 935         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 936         if (unlikely(!tpd_ring->buffer_info)) {
 937                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 938                         size);
 939                 goto err_nomem;
 940         }
 941         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 942                 tpd_ring[i].buffer_info =
 943                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 944                 count += tpd_ring[i].count;
 945         }
 946
 947         for (i = 0; i < num_rx_queues; i++) {
 948                 rfd_ring[i].buffer_info =
 949                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 950                 count += rfd_ring[i].count;
 951                 rx_desc_count += rfd_ring[i].count;
 952         }
 953         /*
 954          * real ring DMA buffer
 955          * each ring/block may need up to 8 bytes for alignment, hence the
 956          * additional bytes tacked onto the end.
 957          */
 958         ring_header->size = size =
 959                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 960                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 961                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 962                 sizeof(struct atl1c_hw_stats) +
 963                 8 * 4 + 8 * 2 * num_rx_queues;
 964
 965         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 966                                 &ring_header->dma);
 967         if (unlikely(!ring_header->desc)) {
 968                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 969                 goto err_nomem;
 970         }
 971         memset(ring_header->desc, 0, ring_header->size);
 972         /* init TPD ring */
 973
 974         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 975         offset = tpd_ring[0].dma - ring_header->dma;
 976         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 977                 tpd_ring[i].dma = ring_header->dma + offset;
 978                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 979                 tpd_ring[i].size =
 980                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 981                 offset += roundup(tpd_ring[i].size, 8);
 982         }
 983         /* init RFD ring */
 984         for (i = 0; i < num_rx_queues; i++) {
 985                 rfd_ring[i].dma = ring_header->dma + offset;
 986                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
 987                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
 988                                 rfd_ring[i].count;
 989                 offset += roundup(rfd_ring[i].size, 8);
 990         }
 991
 992         /* init RRD ring */
 993         for (i = 0; i < num_rx_queues; i++) {
 994                 rrd_ring[i].dma = ring_header->dma + offset;
 995                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
 996                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
 997                                 rrd_ring[i].count;
 998                 offset += roundup(rrd_ring[i].size, 8);
 999         }
1000
1001         adapter->smb.dma = ring_header->dma + offset;
1002         adapter->smb.smb = (u8 *)ring_header->desc + offset;
1003         return 0;
1004
1005 err_nomem:
1006         kfree(tpd_ring->buffer_info);
1007         return -ENOMEM;
1008 }
1009
1010 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1011 {
1012         struct atl1c_hw *hw = &adapter->hw;
1013         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
1014                                 adapter->rfd_ring;
1015         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
1016                                 adapter->rrd_ring;
1017         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1018                                 adapter->tpd_ring;
1019         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
1020         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
1021         int i;
1022         u32 data;
1023
1024         /* TPD */
1025         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1026                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1027                                 AT_DMA_HI_ADDR_MASK) >> 32));
1028         /* just enable normal priority TX queue */
1029         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
1030                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1031                                 AT_DMA_LO_ADDR_MASK));
1032         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
1033                         (u32)(tpd_ring[atl1c_trans_high].dma &
1034                                 AT_DMA_LO_ADDR_MASK));
1035         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1036                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1037
1038
1039         /* RFD */
1040         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1041                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
1042         for (i = 0; i < adapter->num_rx_queues; i++)
1043                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
1044                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1045
1046         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1047                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
1048         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1049                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1050
1051         /* RRD */
1052         for (i = 0; i < adapter->num_rx_queues; i++)
1053                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
1054                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1055         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1056                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
1057
1058         /* CMB */
1059         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
1060
1061         /* SMB */
1062         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
1063                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1064         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
1065                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
1066         if (hw->nic_type == athr_l2c_b) {
1067                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1068                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1069                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1070                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1071                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1072                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1073                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1074                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1075         }
1076         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d_2) {
1077                         /* Power Saving for L2c_B */
1078                 AT_READ_REG(hw, REG_SERDES_LOCK, &data);
1079                 data |= SERDES_MAC_CLK_SLOWDOWN;
1080                 data |= SERDES_PYH_CLK_SLOWDOWN;
1081                 AT_WRITE_REG(hw, REG_SERDES_LOCK, data);
1082         }
1083         /* Load all of base address above */
1084         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1085 }
1086
1087 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1088 {
1089         struct atl1c_hw *hw = &adapter->hw;
1090         u32 dev_ctrl_data;
1091         u32 max_pay_load;
1092         u16 tx_offload_thresh;
1093         u32 txq_ctrl_data;
1094         u32 max_pay_load_data;
1095
1096         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1097         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1098                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1099         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1100         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1101                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1102         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
1103         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1104                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1105         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1106
1107         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1108                         TXQ_NUM_TPD_BURST_SHIFT;
1109         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1110                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1111         max_pay_load_data = (atl1c_pay_load_size[hw->dmar_block] &
1112                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1113         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2)
1114                 max_pay_load_data >>= 1;
1115         txq_ctrl_data |= max_pay_load_data;
1116
1117         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1118 }
1119
1120 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1121 {
1122         struct atl1c_hw *hw = &adapter->hw;
1123         u32 rxq_ctrl_data;
1124
1125         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1126                         RXQ_RFD_BURST_NUM_SHIFT;
1127
1128         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1129                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1130         if (hw->rss_type == atl1c_rss_ipv4)
1131                 rxq_ctrl_data |= RSS_HASH_IPV4;
1132         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1133                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1134         if (hw->rss_type == atl1c_rss_ipv6)
1135                 rxq_ctrl_data |= RSS_HASH_IPV6;
1136         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1137                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1138         if (hw->rss_type != atl1c_rss_disable)
1139                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1140
1141         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1142                         RSS_MODE_SHIFT;
1143         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1144                         RSS_HASH_BITS_SHIFT;
1145         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1146                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_1M &
1147                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1148
1149         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1150 }
1151
1152 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1153 {
1154         struct atl1c_hw *hw = &adapter->hw;
1155
1156         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1157         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1158 }
1159
1160 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1161 {
1162         struct atl1c_hw *hw = &adapter->hw;
1163         u32 dma_ctrl_data;
1164
1165         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1166         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1167                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1168         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1169                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1170         else
1171                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1172
1173         switch (hw->dma_order) {
1174         case atl1c_dma_ord_in:
1175                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1176                 break;
1177         case atl1c_dma_ord_enh:
1178                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1179                 break;
1180         case atl1c_dma_ord_out:
1181                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1182                 break;
1183         default:
1184                 break;
1185         }
1186
1187         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1188                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1189         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1190                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1191         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1192                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1193         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1194                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1195
1196         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1197 }
1198
1199 /*
1200  * Stop the mac, transmit and receive units
1201  * hw - Struct containing variables accessed by shared code
1202  * return : 0  or  idle status (if error)
1203  */
1204 static int atl1c_stop_mac(struct atl1c_hw *hw)
1205 {
1206         u32 data;
1207
1208         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1209         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1210                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1211         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1212
1213         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1214         data &= ~TXQ_CTRL_EN;
1215         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1216
1217         atl1c_wait_until_idle(hw);
1218
1219         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1220         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1221         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1222
1223         return (int)atl1c_wait_until_idle(hw);
1224 }
1225
1226 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1227 {
1228         u32 data;
1229
1230         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1231         switch (hw->adapter->num_rx_queues) {
1232         case 4:
1233                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1234                 break;
1235         case 3:
1236                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1237                 break;
1238         case 2:
1239                 data |= RXQ1_CTRL_EN;
1240                 break;
1241         default:
1242                 break;
1243         }
1244         data |= RXQ_CTRL_EN;
1245         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1246 }
1247
1248 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1249 {
1250         u32 data;
1251
1252         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1253         data |= TXQ_CTRL_EN;
1254         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1255 }
1256
1257 /*
1258  * Reset the transmit and receive units; mask and clear all interrupts.
1259  * hw - Struct containing variables accessed by shared code
1260  * return : 0  or  idle status (if error)
1261  */
1262 static int atl1c_reset_mac(struct atl1c_hw *hw)
1263 {
1264         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1265         struct pci_dev *pdev = adapter->pdev;
1266         u32 master_ctrl_data = 0;
1267
1268         AT_WRITE_REG(hw, REG_IMR, 0);
1269         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1270
1271         atl1c_stop_mac(hw);
1272         /*
1273          * Issue Soft Reset to the MAC.  This will reset the chip's
1274          * transmit, receive, DMA.  It will not effect
1275          * the current PCI configuration.  The global reset bit is self-
1276          * clearing, and should clear within a microsecond.
1277          */
1278         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1279         master_ctrl_data |= MASTER_CTRL_OOB_DIS_OFF;
1280         AT_WRITE_REGW(hw, REG_MASTER_CTRL, ((master_ctrl_data | MASTER_CTRL_SOFT_RST)
1281                         & 0xFFFF));
1282
1283         AT_WRITE_FLUSH(hw);
1284         msleep(10);
1285         /* Wait at least 10ms for All module to be Idle */
1286
1287         if (atl1c_wait_until_idle(hw)) {
1288                 dev_err(&pdev->dev,
1289                         "MAC state machine can't be idle since"
1290                         " disabled for 10ms second\n");
1291                 return -1;
1292         }
1293         return 0;
1294 }
1295
1296 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1297 {
1298         u32 pm_ctrl_data;
1299
1300         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1301         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1302                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1303         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1304         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1305         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1306         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1307         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1308
1309         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1310         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1311         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1312         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1313 }
1314
1315 /*
1316  * Set ASPM state.
1317  * Enable/disable L0s/L1 depend on link state.
1318  */
1319 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1320 {
1321         u32 pm_ctrl_data;
1322         u32 link_ctrl_data;
1323         u32 link_l1_timer = 0xF;
1324
1325         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1326         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
1327
1328         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1329         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1330                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1331         pm_ctrl_data &= ~(PM_CTRL_LCKDET_TIMER_MASK <<
1332                         PM_CTRL_LCKDET_TIMER_SHIFT);
1333         pm_ctrl_data |= AT_LCKDET_TIMER << PM_CTRL_LCKDET_TIMER_SHIFT;
1334
1335         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1336                 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1337                 link_ctrl_data &= ~LINK_CTRL_EXT_SYNC;
1338                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE)) {
1339                         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10)
1340                                 link_ctrl_data |= LINK_CTRL_EXT_SYNC;
1341                 }
1342
1343                 AT_WRITE_REG(hw, REG_LINK_CTRL, link_ctrl_data);
1344
1345                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER;
1346                 pm_ctrl_data &= ~(PM_CTRL_PM_REQ_TIMER_MASK <<
1347                         PM_CTRL_PM_REQ_TIMER_SHIFT);
1348                 pm_ctrl_data |= AT_ASPM_L1_TIMER <<
1349                         PM_CTRL_PM_REQ_TIMER_SHIFT;
1350                 pm_ctrl_data &= ~PM_CTRL_SA_DLY_EN;
1351                 pm_ctrl_data &= ~PM_CTRL_HOTRST;
1352                 pm_ctrl_data |= 1 << PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1353                 pm_ctrl_data |= PM_CTRL_SERDES_PD_EX_L1;
1354         }
1355         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1356         if (linkup) {
1357                 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1358                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1359                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1360                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1361                 if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1362                         pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN;
1363
1364                 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1365                         hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1366                         if (hw->nic_type == athr_l2c_b)
1367                                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE))
1368                                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1369                         pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1370                         pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1371                         pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1372                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1373                 if (hw->adapter->link_speed == SPEED_100 ||
1374                                 hw->adapter->link_speed == SPEED_1000) {
1375                                 pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1376                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1377                                 if (hw->nic_type == athr_l2c_b)
1378                                         link_l1_timer = 7;
1379                                 else if (hw->nic_type == athr_l2c_b2 ||
1380                                         hw->nic_type == athr_l1d_2)
1381                                         link_l1_timer = 4;
1382                                 pm_ctrl_data |= link_l1_timer <<
1383                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1384                         }
1385                 } else {
1386                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1387                         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1388                         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1389                         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1390                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1391                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1392
1393                 }
1394         } else {
1395                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1396                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1397                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1398                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1399
1400                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1401                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1402                 else
1403                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1404         }
1405         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1406
1407         return;
1408 }
1409
1410 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1411 {
1412         struct atl1c_hw *hw = &adapter->hw;
1413         struct net_device *netdev = adapter->netdev;
1414         u32 mac_ctrl_data;
1415
1416         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1417         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1418
1419         if (adapter->link_duplex == FULL_DUPLEX) {
1420                 hw->mac_duplex = true;
1421                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1422         }
1423
1424         if (adapter->link_speed == SPEED_1000)
1425                 hw->mac_speed = atl1c_mac_speed_1000;
1426         else
1427                 hw->mac_speed = atl1c_mac_speed_10_100;
1428
1429         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1430                         MAC_CTRL_SPEED_SHIFT;
1431
1432         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1433         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1434                         MAC_CTRL_PRMLEN_SHIFT);
1435
1436         if (adapter->vlgrp)
1437                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1438
1439         mac_ctrl_data |= MAC_CTRL_BC_EN;
1440         if (netdev->flags & IFF_PROMISC)
1441                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1442         if (netdev->flags & IFF_ALLMULTI)
1443                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1444
1445         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1446         if (hw->nic_type == athr_l1d || hw->nic_type == athr_l2c_b2 ||
1447             hw->nic_type == athr_l1d_2) {
1448                 mac_ctrl_data |= MAC_CTRL_SPEED_MODE_SW;
1449                 mac_ctrl_data |= MAC_CTRL_HASH_ALG_CRC32;
1450         }
1451         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1452 }
1453
1454 /*
1455  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1456  * @adapter: board private structure
1457  *
1458  * Configure the Tx /Rx unit of the MAC after a reset.
1459  */
1460 static int atl1c_configure(struct atl1c_adapter *adapter)
1461 {
1462         struct atl1c_hw *hw = &adapter->hw;
1463         u32 master_ctrl_data = 0;
1464         u32 intr_modrt_data;
1465         u32 data;
1466
1467         /* clear interrupt status */
1468         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1469         /*  Clear any WOL status */
1470         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1471         /* set Interrupt Clear Timer
1472          * HW will enable self to assert interrupt event to system after
1473          * waiting x-time for software to notify it accept interrupt.
1474          */
1475
1476         data = CLK_GATING_EN_ALL;
1477         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1478                 if (hw->nic_type == athr_l2c_b)
1479                         data &= ~CLK_GATING_RXMAC_EN;
1480         } else
1481                 data = 0;
1482         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1483
1484         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1485                 hw->ict & INT_RETRIG_TIMER_MASK);
1486
1487         atl1c_configure_des_ring(adapter);
1488
1489         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1490                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1491                                         IRQ_MODRT_TX_TIMER_SHIFT;
1492                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1493                                         IRQ_MODRT_RX_TIMER_SHIFT;
1494                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1495                 master_ctrl_data |=
1496                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1497         }
1498
1499         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1500                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1501
1502         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1503         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1504
1505         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1506                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1507                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1508                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1509                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1510         }
1511
1512         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1513                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1514                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1515         /* set MTU */
1516         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1517                         VLAN_HLEN + ETH_FCS_LEN);
1518         /* HDS, disable */
1519         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1520
1521         atl1c_configure_tx(adapter);
1522         atl1c_configure_rx(adapter);
1523         atl1c_configure_rss(adapter);
1524         atl1c_configure_dma(adapter);
1525
1526         return 0;
1527 }
1528
1529 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1530 {
1531         u16 hw_reg_addr = 0;
1532         unsigned long *stats_item = NULL;
1533         u32 data;
1534
1535         /* update rx status */
1536         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1537         stats_item  = &adapter->hw_stats.rx_ok;
1538         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1539                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1540                 *stats_item += data;
1541                 stats_item++;
1542                 hw_reg_addr += 4;
1543         }
1544 /* update tx status */
1545         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1546         stats_item  = &adapter->hw_stats.tx_ok;
1547         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1548                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1549                 *stats_item += data;
1550                 stats_item++;
1551                 hw_reg_addr += 4;
1552         }
1553 }
1554
1555 /*
1556  * atl1c_get_stats - Get System Network Statistics
1557  * @netdev: network interface device structure
1558  *
1559  * Returns the address of the device statistics structure.
1560  * The statistics are actually updated from the timer callback.
1561  */
1562 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1563 {
1564         struct atl1c_adapter *adapter = netdev_priv(netdev);
1565         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1566         struct net_device_stats *net_stats = &netdev->stats;
1567
1568         atl1c_update_hw_stats(adapter);
1569         net_stats->rx_packets = hw_stats->rx_ok;
1570         net_stats->tx_packets = hw_stats->tx_ok;
1571         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1572         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1573         net_stats->multicast  = hw_stats->rx_mcast;
1574         net_stats->collisions = hw_stats->tx_1_col +
1575                                 hw_stats->tx_2_col * 2 +
1576                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1577         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1578                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1579                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1580         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1581         net_stats->rx_length_errors = hw_stats->rx_len_err;
1582         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1583         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1584         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1585
1586         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1587
1588         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1589                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1590         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1591         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1592         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1593
1594         return net_stats;
1595 }
1596
1597 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1598 {
1599         u16 phy_data;
1600
1601         spin_lock(&adapter->mdio_lock);
1602         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1603         spin_unlock(&adapter->mdio_lock);
1604 }
1605
1606 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1607                                 enum atl1c_trans_queue type)
1608 {
1609         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1610                                 &adapter->tpd_ring[type];
1611         struct atl1c_buffer *buffer_info;
1612         struct pci_dev *pdev = adapter->pdev;
1613         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1614         u16 hw_next_to_clean;
1615         u16 shift;
1616         u32 data;
1617
1618         if (type == atl1c_trans_high)
1619                 shift = MB_HTPD_CONS_IDX_SHIFT;
1620         else
1621                 shift = MB_NTPD_CONS_IDX_SHIFT;
1622
1623         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1624         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1625
1626         while (next_to_clean != hw_next_to_clean) {
1627                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1628                 atl1c_clean_buffer(pdev, buffer_info, 1);
1629                 if (++next_to_clean == tpd_ring->count)
1630                         next_to_clean = 0;
1631                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1632         }
1633
1634         if (netif_queue_stopped(adapter->netdev) &&
1635                         netif_carrier_ok(adapter->netdev)) {
1636                 netif_wake_queue(adapter->netdev);
1637         }
1638
1639         return true;
1640 }
1641
1642 /*
1643  * atl1c_intr - Interrupt Handler
1644  * @irq: interrupt number
1645  * @data: pointer to a network interface device structure
1646  * @pt_regs: CPU registers structure
1647  */
1648 static irqreturn_t atl1c_intr(int irq, void *data)
1649 {
1650         struct net_device *netdev  = data;
1651         struct atl1c_adapter *adapter = netdev_priv(netdev);
1652         struct pci_dev *pdev = adapter->pdev;
1653         struct atl1c_hw *hw = &adapter->hw;
1654         int max_ints = AT_MAX_INT_WORK;
1655         int handled = IRQ_NONE;
1656         u32 status;
1657         u32 reg_data;
1658
1659         do {
1660                 AT_READ_REG(hw, REG_ISR, &reg_data);
1661                 status = reg_data & hw->intr_mask;
1662
1663                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1664                         if (max_ints != AT_MAX_INT_WORK)
1665                                 handled = IRQ_HANDLED;
1666                         break;
1667                 }
1668                 /* link event */
1669                 if (status & ISR_GPHY)
1670                         atl1c_clear_phy_int(adapter);
1671                 /* Ack ISR */
1672                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1673                 if (status & ISR_RX_PKT) {
1674                         if (likely(napi_schedule_prep(&adapter->napi))) {
1675                                 hw->intr_mask &= ~ISR_RX_PKT;
1676                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1677                                 __napi_schedule(&adapter->napi);
1678                         }
1679                 }
1680                 if (status & ISR_TX_PKT)
1681                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1682
1683                 handled = IRQ_HANDLED;
1684                 /* check if PCIE PHY Link down */
1685                 if (status & ISR_ERROR) {
1686                         if (netif_msg_hw(adapter))
1687                                 dev_err(&pdev->dev,
1688                                         "atl1c hardware error (status = 0x%x)\n",
1689                                         status & ISR_ERROR);
1690                         /* reset MAC */
1691                         adapter->work_event |= ATL1C_WORK_EVENT_RESET;
1692                         schedule_work(&adapter->common_task);
1693                         return IRQ_HANDLED;
1694                 }
1695
1696                 if (status & ISR_OVER)
1697                         if (netif_msg_intr(adapter))
1698                                 dev_warn(&pdev->dev,
1699                                         "TX/RX overflow (status = 0x%x)\n",
1700                                         status & ISR_OVER);
1701
1702                 /* link event */
1703                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1704                         netdev->stats.tx_carrier_errors++;
1705                         atl1c_link_chg_event(adapter);
1706                         break;
1707                 }
1708
1709         } while (--max_ints > 0);
1710         /* re-enable Interrupt*/
1711         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1712         return handled;
1713 }
1714
1715 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1716                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1717 {
1718         /*
1719          * The pid field in RRS in not correct sometimes, so we
1720          * cannot figure out if the packet is fragmented or not,
1721          * so we tell the KERNEL CHECKSUM_NONE
1722          */
1723         skb_checksum_none_assert(skb);
1724 }
1725
1726 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1727 {
1728         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1729         struct pci_dev *pdev = adapter->pdev;
1730         struct atl1c_buffer *buffer_info, *next_info;
1731         struct sk_buff *skb;
1732         void *vir_addr = NULL;
1733         u16 num_alloc = 0;
1734         u16 rfd_next_to_use, next_next;
1735         struct atl1c_rx_free_desc *rfd_desc;
1736
1737         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1738         if (++next_next == rfd_ring->count)
1739                 next_next = 0;
1740         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1741         next_info = &rfd_ring->buffer_info[next_next];
1742
1743         while (next_info->flags & ATL1C_BUFFER_FREE) {
1744                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1745
1746                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1747                 if (unlikely(!skb)) {
1748                         if (netif_msg_rx_err(adapter))
1749                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1750                         break;
1751                 }
1752
1753                 /*
1754                  * Make buffer alignment 2 beyond a 16 byte boundary
1755                  * this will result in a 16 byte aligned IP header after
1756                  * the 14 byte MAC header is removed
1757                  */
1758                 vir_addr = skb->data;
1759                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1760                 buffer_info->skb = skb;
1761                 buffer_info->length = adapter->rx_buffer_len;
1762                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1763                                                 buffer_info->length,
1764                                                 PCI_DMA_FROMDEVICE);
1765                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1766                         ATL1C_PCIMAP_FROMDEVICE);
1767                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1768                 rfd_next_to_use = next_next;
1769                 if (++next_next == rfd_ring->count)
1770                         next_next = 0;
1771                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1772                 next_info = &rfd_ring->buffer_info[next_next];
1773                 num_alloc++;
1774         }
1775
1776         if (num_alloc) {
1777                 /* TODO: update mailbox here */
1778                 wmb();
1779                 rfd_ring->next_to_use = rfd_next_to_use;
1780                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1781                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1782         }
1783
1784         return num_alloc;
1785 }
1786
1787 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1788                         struct  atl1c_recv_ret_status *rrs, u16 num)
1789 {
1790         u16 i;
1791         /* the relationship between rrd and rfd is one map one */
1792         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1793                                         rrd_ring->next_to_clean)) {
1794                 rrs->word3 &= ~RRS_RXD_UPDATED;
1795                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1796                         rrd_ring->next_to_clean = 0;
1797         }
1798 }
1799
1800 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1801         struct atl1c_recv_ret_status *rrs, u16 num)
1802 {
1803         u16 i;
1804         u16 rfd_index;
1805         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1806
1807         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1808                         RRS_RX_RFD_INDEX_MASK;
1809         for (i = 0; i < num; i++) {
1810                 buffer_info[rfd_index].skb = NULL;
1811                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1812                                         ATL1C_BUFFER_FREE);
1813                 if (++rfd_index == rfd_ring->count)
1814                         rfd_index = 0;
1815         }
1816         rfd_ring->next_to_clean = rfd_index;
1817 }
1818
1819 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1820                    int *work_done, int work_to_do)
1821 {
1822         u16 rfd_num, rfd_index;
1823         u16 count = 0;
1824         u16 length;
1825         struct pci_dev *pdev = adapter->pdev;
1826         struct net_device *netdev  = adapter->netdev;
1827         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1828         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1829         struct sk_buff *skb;
1830         struct atl1c_recv_ret_status *rrs;
1831         struct atl1c_buffer *buffer_info;
1832
1833         while (1) {
1834                 if (*work_done >= work_to_do)
1835                         break;
1836                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1837                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1838                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1839                                 RRS_RX_RFD_CNT_MASK;
1840                         if (unlikely(rfd_num != 1))
1841                                 /* TODO support mul rfd*/
1842                                 if (netif_msg_rx_err(adapter))
1843                                         dev_warn(&pdev->dev,
1844                                                 "Multi rfd not support yet!\n");
1845                         goto rrs_checked;
1846                 } else {
1847                         break;
1848                 }
1849 rrs_checked:
1850                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1851                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1852                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1853                                 if (netif_msg_rx_err(adapter))
1854                                         dev_warn(&pdev->dev,
1855                                                 "wrong packet! rrs word3 is %x\n",
1856                                                 rrs->word3);
1857                         continue;
1858                 }
1859
1860                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1861                                 RRS_PKT_SIZE_MASK);
1862                 /* Good Receive */
1863                 if (likely(rfd_num == 1)) {
1864                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1865                                         RRS_RX_RFD_INDEX_MASK;
1866                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1867                         pci_unmap_single(pdev, buffer_info->dma,
1868                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1869                         skb = buffer_info->skb;
1870                 } else {
1871                         /* TODO */
1872                         if (netif_msg_rx_err(adapter))
1873                                 dev_warn(&pdev->dev,
1874                                         "Multi rfd not support yet!\n");
1875                         break;
1876                 }
1877                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1878                 skb_put(skb, length - ETH_FCS_LEN);
1879                 skb->protocol = eth_type_trans(skb, netdev);
1880                 atl1c_rx_checksum(adapter, skb, rrs);
1881                 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1882                         u16 vlan;
1883
1884                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1885                         vlan = le16_to_cpu(vlan);
1886                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1887                 } else
1888                         netif_receive_skb(skb);
1889
1890                 (*work_done)++;
1891                 count++;
1892         }
1893         if (count)
1894                 atl1c_alloc_rx_buffer(adapter, que);
1895 }
1896
1897 /*
1898  * atl1c_clean - NAPI Rx polling callback
1899  * @adapter: board private structure
1900  */
1901 static int atl1c_clean(struct napi_struct *napi, int budget)
1902 {
1903         struct atl1c_adapter *adapter =
1904                         container_of(napi, struct atl1c_adapter, napi);
1905         int work_done = 0;
1906
1907         /* Keep link state information with original netdev */
1908         if (!netif_carrier_ok(adapter->netdev))
1909                 goto quit_polling;
1910         /* just enable one RXQ */
1911         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1912
1913         if (work_done < budget) {
1914 quit_polling:
1915                 napi_complete(napi);
1916                 adapter->hw.intr_mask |= ISR_RX_PKT;
1917                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1918         }
1919         return work_done;
1920 }
1921
1922 #ifdef CONFIG_NET_POLL_CONTROLLER
1923
1924 /*
1925  * Polling 'interrupt' - used by things like netconsole to send skbs
1926  * without having to re-enable interrupts. It's not called while
1927  * the interrupt routine is executing.
1928  */
1929 static void atl1c_netpoll(struct net_device *netdev)
1930 {
1931         struct atl1c_adapter *adapter = netdev_priv(netdev);
1932
1933         disable_irq(adapter->pdev->irq);
1934         atl1c_intr(adapter->pdev->irq, netdev);
1935         enable_irq(adapter->pdev->irq);
1936 }
1937 #endif
1938
1939 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1940 {
1941         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1942         u16 next_to_use = 0;
1943         u16 next_to_clean = 0;
1944
1945         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1946         next_to_use   = tpd_ring->next_to_use;
1947
1948         return (u16)(next_to_clean > next_to_use) ?
1949                 (next_to_clean - next_to_use - 1) :
1950                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1951 }
1952
1953 /*
1954  * get next usable tpd
1955  * Note: should call atl1c_tdp_avail to make sure
1956  * there is enough tpd to use
1957  */
1958 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1959         enum atl1c_trans_queue type)
1960 {
1961         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1962         struct atl1c_tpd_desc *tpd_desc;
1963         u16 next_to_use = 0;
1964
1965         next_to_use = tpd_ring->next_to_use;
1966         if (++tpd_ring->next_to_use == tpd_ring->count)
1967                 tpd_ring->next_to_use = 0;
1968         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1969         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1970         return  tpd_desc;
1971 }
1972
1973 static struct atl1c_buffer *
1974 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1975 {
1976         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1977
1978         return &tpd_ring->buffer_info[tpd -
1979                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1980 }
1981
1982 /* Calculate the transmit packet descript needed*/
1983 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1984 {
1985         u16 tpd_req;
1986         u16 proto_hdr_len = 0;
1987
1988         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1989
1990         if (skb_is_gso(skb)) {
1991                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1992                 if (proto_hdr_len < skb_headlen(skb))
1993                         tpd_req++;
1994                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1995                         tpd_req++;
1996         }
1997         return tpd_req;
1998 }
1999
2000 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
2001                           struct sk_buff *skb,
2002                           struct atl1c_tpd_desc **tpd,
2003                           enum atl1c_trans_queue type)
2004 {
2005         struct pci_dev *pdev = adapter->pdev;
2006         u8 hdr_len;
2007         u32 real_len;
2008         unsigned short offload_type;
2009         int err;
2010
2011         if (skb_is_gso(skb)) {
2012                 if (skb_header_cloned(skb)) {
2013                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2014                         if (unlikely(err))
2015                                 return -1;
2016                 }
2017                 offload_type = skb_shinfo(skb)->gso_type;
2018
2019                 if (offload_type & SKB_GSO_TCPV4) {
2020                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2021                                         + ntohs(ip_hdr(skb)->tot_len));
2022
2023                         if (real_len < skb->len)
2024                                 pskb_trim(skb, real_len);
2025
2026                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2027                         if (unlikely(skb->len == hdr_len)) {
2028                                 /* only xsum need */
2029                                 if (netif_msg_tx_queued(adapter))
2030                                         dev_warn(&pdev->dev,
2031                                                 "IPV4 tso with zero data??\n");
2032                                 goto check_sum;
2033                         } else {
2034                                 ip_hdr(skb)->check = 0;
2035                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2036                                                         ip_hdr(skb)->saddr,
2037                                                         ip_hdr(skb)->daddr,
2038                                                         0, IPPROTO_TCP, 0);
2039                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2040                         }
2041                 }
2042
2043                 if (offload_type & SKB_GSO_TCPV6) {
2044                         struct atl1c_tpd_ext_desc *etpd =
2045                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2046
2047                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2048                         *tpd = atl1c_get_tpd(adapter, type);
2049                         ipv6_hdr(skb)->payload_len = 0;
2050                         /* check payload == 0 byte ? */
2051                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2052                         if (unlikely(skb->len == hdr_len)) {
2053                                 /* only xsum need */
2054                                 if (netif_msg_tx_queued(adapter))
2055                                         dev_warn(&pdev->dev,
2056                                                 "IPV6 tso with zero data??\n");
2057                                 goto check_sum;
2058                         } else
2059                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2060                                                 &ipv6_hdr(skb)->saddr,
2061                                                 &ipv6_hdr(skb)->daddr,
2062                                                 0, IPPROTO_TCP, 0);
2063                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2064                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2065                         etpd->pkt_len = cpu_to_le32(skb->len);
2066                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2067                 }
2068
2069                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2070                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2071                                 TPD_TCPHDR_OFFSET_SHIFT;
2072                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2073                                 TPD_MSS_SHIFT;
2074                 return 0;
2075         }
2076
2077 check_sum:
2078         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2079                 u8 css, cso;
2080                 cso = skb_checksum_start_offset(skb);
2081
2082                 if (unlikely(cso & 0x1)) {
2083                         if (netif_msg_tx_err(adapter))
2084                                 dev_err(&adapter->pdev->dev,
2085                                         "payload offset should not an event number\n");
2086                         return -1;
2087                 } else {
2088                         css = cso + skb->csum_offset;
2089
2090                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2091                                         TPD_PLOADOFFSET_SHIFT;
2092                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2093                                         TPD_CCSUM_OFFSET_SHIFT;
2094                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2095                 }
2096         }
2097         return 0;
2098 }
2099
2100 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2101                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2102                         enum atl1c_trans_queue type)
2103 {
2104         struct atl1c_tpd_desc *use_tpd = NULL;
2105         struct atl1c_buffer *buffer_info = NULL;
2106         u16 buf_len = skb_headlen(skb);
2107         u16 map_len = 0;
2108         u16 mapped_len = 0;
2109         u16 hdr_len = 0;
2110         u16 nr_frags;
2111         u16 f;
2112         int tso;
2113
2114         nr_frags = skb_shinfo(skb)->nr_frags;
2115         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2116         if (tso) {
2117                 /* TSO */
2118                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2119                 use_tpd = tpd;
2120
2121                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2122                 buffer_info->length = map_len;
2123                 buffer_info->dma = pci_map_single(adapter->pdev,
2124                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2125                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2126                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2127                         ATL1C_PCIMAP_TODEVICE);
2128                 mapped_len += map_len;
2129                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2130                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2131         }
2132
2133         if (mapped_len < buf_len) {
2134                 /* mapped_len == 0, means we should use the first tpd,
2135                    which is given by caller  */
2136                 if (mapped_len == 0)
2137                         use_tpd = tpd;
2138                 else {
2139                         use_tpd = atl1c_get_tpd(adapter, type);
2140                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2141                 }
2142                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2143                 buffer_info->length = buf_len - mapped_len;
2144                 buffer_info->dma =
2145                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2146                                         buffer_info->length, PCI_DMA_TODEVICE);
2147                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2148                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2149                         ATL1C_PCIMAP_TODEVICE);
2150                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2151                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2152         }
2153
2154         for (f = 0; f < nr_frags; f++) {
2155                 struct skb_frag_struct *frag;
2156
2157                 frag = &skb_shinfo(skb)->frags[f];
2158
2159                 use_tpd = atl1c_get_tpd(adapter, type);
2160                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2161
2162                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2163                 buffer_info->length = frag->size;
2164                 buffer_info->dma =
2165                         pci_map_page(adapter->pdev, frag->page,
2166                                         frag->page_offset,
2167                                         buffer_info->length,
2168                                         PCI_DMA_TODEVICE);
2169                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2170                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2171                         ATL1C_PCIMAP_TODEVICE);
2172                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2173                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2174         }
2175
2176         /* The last tpd */
2177         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2178         /* The last buffer info contain the skb address,
2179            so it will be free after unmap */
2180         buffer_info->skb = skb;
2181 }
2182
2183 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2184                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2185 {
2186         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2187         u32 prod_data;
2188
2189         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2190         switch (type) {
2191         case atl1c_trans_high:
2192                 prod_data &= 0xFFFF0000;
2193                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2194                 break;
2195         case atl1c_trans_normal:
2196                 prod_data &= 0x0000FFFF;
2197                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2198                 break;
2199         default:
2200                 break;
2201         }
2202         wmb();
2203         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2204 }
2205
2206 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2207                                           struct net_device *netdev)
2208 {
2209         struct atl1c_adapter *adapter = netdev_priv(netdev);
2210         unsigned long flags;
2211         u16 tpd_req = 1;
2212         struct atl1c_tpd_desc *tpd;
2213         enum atl1c_trans_queue type = atl1c_trans_normal;
2214
2215         if (test_bit(__AT_DOWN, &adapter->flags)) {
2216                 dev_kfree_skb_any(skb);
2217                 return NETDEV_TX_OK;
2218         }
2219
2220         tpd_req = atl1c_cal_tpd_req(skb);
2221         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2222                 if (netif_msg_pktdata(adapter))
2223                         dev_info(&adapter->pdev->dev, "tx locked\n");
2224                 return NETDEV_TX_LOCKED;
2225         }
2226         if (skb->mark == 0x01)
2227                 type = atl1c_trans_high;
2228         else
2229                 type = atl1c_trans_normal;
2230
2231         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2232                 /* no enough descriptor, just stop queue */
2233                 netif_stop_queue(netdev);
2234                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2235                 return NETDEV_TX_BUSY;
2236         }
2237
2238         tpd = atl1c_get_tpd(adapter, type);
2239
2240         /* do TSO and check sum */
2241         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2242                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2243                 dev_kfree_skb_any(skb);
2244                 return NETDEV_TX_OK;
2245         }
2246
2247         if (unlikely(vlan_tx_tag_present(skb))) {
2248                 u16 vlan = vlan_tx_tag_get(skb);
2249                 __le16 tag;
2250
2251                 vlan = cpu_to_le16(vlan);
2252                 AT_VLAN_TO_TAG(vlan, tag);
2253                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2254                 tpd->vlan_tag = tag;
2255         }
2256
2257         if (skb_network_offset(skb) != ETH_HLEN)
2258                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2259
2260         atl1c_tx_map(adapter, skb, tpd, type);
2261         atl1c_tx_queue(adapter, skb, tpd, type);
2262
2263         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2264         return NETDEV_TX_OK;
2265 }
2266
2267 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2268 {
2269         struct net_device *netdev = adapter->netdev;
2270
2271         free_irq(adapter->pdev->irq, netdev);
2272
2273         if (adapter->have_msi)
2274                 pci_disable_msi(adapter->pdev);
2275 }
2276
2277 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2278 {
2279         struct pci_dev    *pdev   = adapter->pdev;
2280         struct net_device *netdev = adapter->netdev;
2281         int flags = 0;
2282         int err = 0;
2283
2284         adapter->have_msi = true;
2285         err = pci_enable_msi(adapter->pdev);
2286         if (err) {
2287                 if (netif_msg_ifup(adapter))
2288                         dev_err(&pdev->dev,
2289                                 "Unable to allocate MSI interrupt Error: %d\n",
2290                                 err);
2291                 adapter->have_msi = false;
2292         } else
2293                 netdev->irq = pdev->irq;
2294
2295         if (!adapter->have_msi)
2296                 flags |= IRQF_SHARED;
2297         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2298                         netdev->name, netdev);
2299         if (err) {
2300                 if (netif_msg_ifup(adapter))
2301                         dev_err(&pdev->dev,
2302                                 "Unable to allocate interrupt Error: %d\n",
2303                                 err);
2304                 if (adapter->have_msi)
2305                         pci_disable_msi(adapter->pdev);
2306                 return err;
2307         }
2308         if (netif_msg_ifup(adapter))
2309                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2310         return err;
2311 }
2312
2313 static int atl1c_up(struct atl1c_adapter *adapter)
2314 {
2315         struct net_device *netdev = adapter->netdev;
2316         int num;
2317         int err;
2318         int i;
2319
2320         netif_carrier_off(netdev);
2321         atl1c_init_ring_ptrs(adapter);
2322         atl1c_set_multi(netdev);
2323         atl1c_restore_vlan(adapter);
2324
2325         for (i = 0; i < adapter->num_rx_queues; i++) {
2326                 num = atl1c_alloc_rx_buffer(adapter, i);
2327                 if (unlikely(num == 0)) {
2328                         err = -ENOMEM;
2329                         goto err_alloc_rx;
2330                 }
2331         }
2332
2333         if (atl1c_configure(adapter)) {
2334                 err = -EIO;
2335                 goto err_up;
2336         }
2337
2338         err = atl1c_request_irq(adapter);
2339         if (unlikely(err))
2340                 goto err_up;
2341
2342         clear_bit(__AT_DOWN, &adapter->flags);
2343         napi_enable(&adapter->napi);
2344         atl1c_irq_enable(adapter);
2345         atl1c_check_link_status(adapter);
2346         netif_start_queue(netdev);
2347         return err;
2348
2349 err_up:
2350 err_alloc_rx:
2351         atl1c_clean_rx_ring(adapter);
2352         return err;
2353 }
2354
2355 static void atl1c_down(struct atl1c_adapter *adapter)
2356 {
2357         struct net_device *netdev = adapter->netdev;
2358
2359         atl1c_del_timer(adapter);
2360         adapter->work_event = 0; /* clear all event */
2361         /* signal that we're down so the interrupt handler does not
2362          * reschedule our watchdog timer */
2363         set_bit(__AT_DOWN, &adapter->flags);
2364         netif_carrier_off(netdev);
2365         napi_disable(&adapter->napi);
2366         atl1c_irq_disable(adapter);
2367         atl1c_free_irq(adapter);
2368         /* reset MAC to disable all RX/TX */
2369         atl1c_reset_mac(&adapter->hw);
2370         msleep(1);
2371
2372         adapter->link_speed = SPEED_0;
2373         adapter->link_duplex = -1;
2374         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2375         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2376         atl1c_clean_rx_ring(adapter);
2377 }
2378
2379 /*
2380  * atl1c_open - Called when a network interface is made active
2381  * @netdev: network interface device structure
2382  *
2383  * Returns 0 on success, negative value on failure
2384  *
2385  * The open entry point is called when a network interface is made
2386  * active by the system (IFF_UP).  At this point all resources needed
2387  * for transmit and receive operations are allocated, the interrupt
2388  * handler is registered with the OS, the watchdog timer is started,
2389  * and the stack is notified that the interface is ready.
2390  */
2391 static int atl1c_open(struct net_device *netdev)
2392 {
2393         struct atl1c_adapter *adapter = netdev_priv(netdev);
2394         int err;
2395
2396         /* disallow open during test */
2397         if (test_bit(__AT_TESTING, &adapter->flags))
2398                 return -EBUSY;
2399
2400         /* allocate rx/tx dma buffer & descriptors */
2401         err = atl1c_setup_ring_resources(adapter);
2402         if (unlikely(err))
2403                 return err;
2404
2405         err = atl1c_up(adapter);
2406         if (unlikely(err))
2407                 goto err_up;
2408
2409         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2410                 u32 phy_data;
2411
2412                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2413                 phy_data |= MDIO_AP_EN;
2414                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2415         }
2416         return 0;
2417
2418 err_up:
2419         atl1c_free_irq(adapter);
2420         atl1c_free_ring_resources(adapter);
2421         atl1c_reset_mac(&adapter->hw);
2422         return err;
2423 }
2424
2425 /*
2426  * atl1c_close - Disables a network interface
2427  * @netdev: network interface device structure
2428  *
2429  * Returns 0, this is not allowed to fail
2430  *
2431  * The close entry point is called when an interface is de-activated
2432  * by the OS.  The hardware is still under the drivers control, but
2433  * needs to be disabled.  A global MAC reset is issued to stop the
2434  * hardware, and all transmit and receive resources are freed.
2435  */
2436 static int atl1c_close(struct net_device *netdev)
2437 {
2438         struct atl1c_adapter *adapter = netdev_priv(netdev);
2439
2440         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2441         atl1c_down(adapter);
2442         atl1c_free_ring_resources(adapter);
2443         return 0;
2444 }
2445
2446 static int atl1c_suspend(struct device *dev)
2447 {
2448         struct pci_dev *pdev = to_pci_dev(dev);
2449         struct net_device *netdev = pci_get_drvdata(pdev);
2450         struct atl1c_adapter *adapter = netdev_priv(netdev);
2451         struct atl1c_hw *hw = &adapter->hw;
2452         u32 mac_ctrl_data = 0;
2453         u32 master_ctrl_data = 0;
2454         u32 wol_ctrl_data = 0;
2455         u16 mii_intr_status_data = 0;
2456         u32 wufc = adapter->wol;
2457
2458         atl1c_disable_l0s_l1(hw);
2459         if (netif_running(netdev)) {
2460                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2461                 atl1c_down(adapter);
2462         }
2463         netif_device_detach(netdev);
2464
2465         if (wufc)
2466                 if (atl1c_phy_power_saving(hw) != 0)
2467                         dev_dbg(&pdev->dev, "phy power saving failed");
2468
2469         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2470         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
2471
2472         master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2473         mac_ctrl_data &= ~(MAC_CTRL_PRMLEN_MASK << MAC_CTRL_PRMLEN_SHIFT);
2474         mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2475                         MAC_CTRL_PRMLEN_MASK) <<
2476                         MAC_CTRL_PRMLEN_SHIFT);
2477         mac_ctrl_data &= ~(MAC_CTRL_SPEED_MASK << MAC_CTRL_SPEED_SHIFT);
2478         mac_ctrl_data &= ~MAC_CTRL_DUPLX;
2479
2480         if (wufc) {
2481                 mac_ctrl_data |= MAC_CTRL_RX_EN;
2482                 if (adapter->link_speed == SPEED_1000 ||
2483                         adapter->link_speed == SPEED_0) {
2484                         mac_ctrl_data |= atl1c_mac_speed_1000 <<
2485                                         MAC_CTRL_SPEED_SHIFT;
2486                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2487                 } else
2488                         mac_ctrl_data |= atl1c_mac_speed_10_100 <<
2489                                         MAC_CTRL_SPEED_SHIFT;
2490
2491                 if (adapter->link_duplex == DUPLEX_FULL)
2492                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2493
2494                 /* turn on magic packet wol */
2495                 if (wufc & AT_WUFC_MAG)
2496                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2497
2498                 if (wufc & AT_WUFC_LNKC) {
2499                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2500                         /* only link up can wake up */
2501                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2502                                 dev_dbg(&pdev->dev, "%s: read write phy "
2503                                                   "register failed.\n",
2504                                                   atl1c_driver_name);
2505                         }
2506                 }
2507                 /* clear phy interrupt */
2508                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2509                 /* Config MAC Ctrl register */
2510                 if (adapter->vlgrp)
2511                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2512
2513                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2514                 if (wufc & AT_WUFC_MAG)
2515                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2516
2517                 dev_dbg(&pdev->dev,
2518                         "%s: suspend MAC=0x%x\n",
2519                         atl1c_driver_name, mac_ctrl_data);
2520                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2521                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2522                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2523
2524                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
2525                         GPHY_CTRL_EXT_RESET);
2526         } else {
2527                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_POWER_SAVING);
2528                 master_ctrl_data |= MASTER_CTRL_CLK_SEL_DIS;
2529                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2530                 mac_ctrl_data |= MAC_CTRL_DUPLX;
2531                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2532                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2533                 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2534                 hw->phy_configured = false; /* re-init PHY when resume */
2535         }
2536
2537         return 0;
2538 }
2539
2540 #ifdef CONFIG_PM_SLEEP
2541 static int atl1c_resume(struct device *dev)
2542 {
2543         struct pci_dev *pdev = to_pci_dev(dev);
2544         struct net_device *netdev = pci_get_drvdata(pdev);
2545         struct atl1c_adapter *adapter = netdev_priv(netdev);
2546
2547         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2548         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2549                         ATL1C_PCIE_PHY_RESET);
2550
2551         atl1c_phy_reset(&adapter->hw);
2552         atl1c_reset_mac(&adapter->hw);
2553         atl1c_phy_init(&adapter->hw);
2554
2555 #if 0
2556         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2557         pm_data &= ~PM_CTRLSTAT_PME_EN;
2558         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2559 #endif
2560
2561         netif_device_attach(netdev);
2562         if (netif_running(netdev))
2563                 atl1c_up(adapter);
2564
2565         return 0;
2566 }
2567 #endif
2568
2569 static void atl1c_shutdown(struct pci_dev *pdev)
2570 {
2571         struct net_device *netdev = pci_get_drvdata(pdev);
2572         struct atl1c_adapter *adapter = netdev_priv(netdev);
2573
2574         atl1c_suspend(&pdev->dev);
2575         pci_wake_from_d3(pdev, adapter->wol);
2576         pci_set_power_state(pdev, PCI_D3hot);
2577 }
2578
2579 static const struct net_device_ops atl1c_netdev_ops = {
2580         .ndo_open               = atl1c_open,
2581         .ndo_stop               = atl1c_close,
2582         .ndo_validate_addr      = eth_validate_addr,
2583         .ndo_start_xmit         = atl1c_xmit_frame,
2584         .ndo_set_mac_address    = atl1c_set_mac_addr,
2585         .ndo_set_multicast_list = atl1c_set_multi,
2586         .ndo_change_mtu         = atl1c_change_mtu,
2587         .ndo_fix_features       = atl1c_fix_features,
2588         .ndo_do_ioctl           = atl1c_ioctl,
2589         .ndo_tx_timeout         = atl1c_tx_timeout,
2590         .ndo_get_stats          = atl1c_get_stats,
2591         .ndo_vlan_rx_register   = atl1c_vlan_rx_register,
2592 #ifdef CONFIG_NET_POLL_CONTROLLER
2593         .ndo_poll_controller    = atl1c_netpoll,
2594 #endif
2595 };
2596
2597 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2598 {
2599         SET_NETDEV_DEV(netdev, &pdev->dev);
2600         pci_set_drvdata(pdev, netdev);
2601
2602         netdev->irq  = pdev->irq;
2603         netdev->netdev_ops = &atl1c_netdev_ops;
2604         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2605         atl1c_set_ethtool_ops(netdev);
2606
2607         /* TODO: add when ready */
2608         netdev->hw_features =   NETIF_F_SG         |
2609                                 NETIF_F_HW_CSUM    |
2610                                 NETIF_F_HW_VLAN_TX |
2611                                 NETIF_F_TSO        |
2612                                 NETIF_F_TSO6;
2613         netdev->features =      netdev->hw_features |
2614                                 NETIF_F_HW_VLAN_RX;
2615         return 0;
2616 }
2617
2618 /*
2619  * atl1c_probe - Device Initialization Routine
2620  * @pdev: PCI device information struct
2621  * @ent: entry in atl1c_pci_tbl
2622  *
2623  * Returns 0 on success, negative on failure
2624  *
2625  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2626  * The OS initialization, configuring of the adapter private structure,
2627  * and a hardware reset occur.
2628  */
2629 static int __devinit atl1c_probe(struct pci_dev *pdev,
2630                                  const struct pci_device_id *ent)
2631 {
2632         struct net_device *netdev;
2633         struct atl1c_adapter *adapter;
2634         static int cards_found;
2635
2636         int err = 0;
2637
2638         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2639         err = pci_enable_device_mem(pdev);
2640         if (err) {
2641                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2642                 return err;
2643         }
2644
2645         /*
2646          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2647          * shared register for the high 32 bits, so only a single, aligned,
2648          * 4 GB physical address range can be used at a time.
2649          *
2650          * Supporting 64-bit DMA on this hardware is more trouble than it's
2651          * worth.  It is far easier to limit to 32-bit DMA than update
2652          * various kernel subsystems to support the mechanics required by a
2653          * fixed-high-32-bit system.
2654          */
2655         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2656             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2657                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2658                 goto err_dma;
2659         }
2660
2661         err = pci_request_regions(pdev, atl1c_driver_name);
2662         if (err) {
2663                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2664                 goto err_pci_reg;
2665         }
2666
2667         pci_set_master(pdev);
2668
2669         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2670         if (netdev == NULL) {
2671                 err = -ENOMEM;
2672                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2673                 goto err_alloc_etherdev;
2674         }
2675
2676         err = atl1c_init_netdev(netdev, pdev);
2677         if (err) {
2678                 dev_err(&pdev->dev, "init netdevice failed\n");
2679                 goto err_init_netdev;
2680         }
2681         adapter = netdev_priv(netdev);
2682         adapter->bd_number = cards_found;
2683         adapter->netdev = netdev;
2684         adapter->pdev = pdev;
2685         adapter->hw.adapter = adapter;
2686         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2687         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2688         if (!adapter->hw.hw_addr) {
2689                 err = -EIO;
2690                 dev_err(&pdev->dev, "cannot map device registers\n");
2691                 goto err_ioremap;
2692         }
2693         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2694
2695         /* init mii data */
2696         adapter->mii.dev = netdev;
2697         adapter->mii.mdio_read  = atl1c_mdio_read;
2698         adapter->mii.mdio_write = atl1c_mdio_write;
2699         adapter->mii.phy_id_mask = 0x1f;
2700         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2701         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2702         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2703                         (unsigned long)adapter);
2704         /* setup the private structure */
2705         err = atl1c_sw_init(adapter);
2706         if (err) {
2707                 dev_err(&pdev->dev, "net device private data init failed\n");
2708                 goto err_sw_init;
2709         }
2710         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2711                         ATL1C_PCIE_PHY_RESET);
2712
2713         /* Init GPHY as early as possible due to power saving issue  */
2714         atl1c_phy_reset(&adapter->hw);
2715
2716         err = atl1c_reset_mac(&adapter->hw);
2717         if (err) {
2718                 err = -EIO;
2719                 goto err_reset;
2720         }
2721
2722         /* reset the controller to
2723          * put the device in a known good starting state */
2724         err = atl1c_phy_init(&adapter->hw);
2725         if (err) {
2726                 err = -EIO;
2727                 goto err_reset;
2728         }
2729         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2730                 err = -EIO;
2731                 dev_err(&pdev->dev, "get mac address failed\n");
2732                 goto err_eeprom;
2733         }
2734         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2735         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2736         if (netif_msg_probe(adapter))
2737                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2738                         adapter->hw.mac_addr);
2739
2740         atl1c_hw_set_mac_addr(&adapter->hw);
2741         INIT_WORK(&adapter->common_task, atl1c_common_task);
2742         adapter->work_event = 0;
2743         err = register_netdev(netdev);
2744         if (err) {
2745                 dev_err(&pdev->dev, "register netdevice failed\n");
2746                 goto err_register;
2747         }
2748
2749         if (netif_msg_probe(adapter))
2750                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2751         cards_found++;
2752         return 0;
2753
2754 err_reset:
2755 err_register:
2756 err_sw_init:
2757 err_eeprom:
2758         iounmap(adapter->hw.hw_addr);
2759 err_init_netdev:
2760 err_ioremap:
2761         free_netdev(netdev);
2762 err_alloc_etherdev:
2763         pci_release_regions(pdev);
2764 err_pci_reg:
2765 err_dma:
2766         pci_disable_device(pdev);
2767         return err;
2768 }
2769
2770 /*
2771  * atl1c_remove - Device Removal Routine
2772  * @pdev: PCI device information struct
2773  *
2774  * atl1c_remove is called by the PCI subsystem to alert the driver
2775  * that it should release a PCI device.  The could be caused by a
2776  * Hot-Plug event, or because the driver is going to be removed from
2777  * memory.
2778  */
2779 static void __devexit atl1c_remove(struct pci_dev *pdev)
2780 {
2781         struct net_device *netdev = pci_get_drvdata(pdev);
2782         struct atl1c_adapter *adapter = netdev_priv(netdev);
2783
2784         unregister_netdev(netdev);
2785         atl1c_phy_disable(&adapter->hw);
2786
2787         iounmap(adapter->hw.hw_addr);
2788
2789         pci_release_regions(pdev);
2790         pci_disable_device(pdev);
2791         free_netdev(netdev);
2792 }
2793
2794 /*
2795  * atl1c_io_error_detected - called when PCI error is detected
2796  * @pdev: Pointer to PCI device
2797  * @state: The current pci connection state
2798  *
2799  * This function is called after a PCI bus error affecting
2800  * this device has been detected.
2801  */
2802 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2803                                                 pci_channel_state_t state)
2804 {
2805         struct net_device *netdev = pci_get_drvdata(pdev);
2806         struct atl1c_adapter *adapter = netdev_priv(netdev);
2807
2808         netif_device_detach(netdev);
2809
2810         if (state == pci_channel_io_perm_failure)
2811                 return PCI_ERS_RESULT_DISCONNECT;
2812
2813         if (netif_running(netdev))
2814                 atl1c_down(adapter);
2815
2816         pci_disable_device(pdev);
2817
2818         /* Request a slot slot reset. */
2819         return PCI_ERS_RESULT_NEED_RESET;
2820 }
2821
2822 /*
2823  * atl1c_io_slot_reset - called after the pci bus has been reset.
2824  * @pdev: Pointer to PCI device
2825  *
2826  * Restart the card from scratch, as if from a cold-boot. Implementation
2827  * resembles the first-half of the e1000_resume routine.
2828  */
2829 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2830 {
2831         struct net_device *netdev = pci_get_drvdata(pdev);
2832         struct atl1c_adapter *adapter = netdev_priv(netdev);
2833
2834         if (pci_enable_device(pdev)) {
2835                 if (netif_msg_hw(adapter))
2836                         dev_err(&pdev->dev,
2837                                 "Cannot re-enable PCI device after reset\n");
2838                 return PCI_ERS_RESULT_DISCONNECT;
2839         }
2840         pci_set_master(pdev);
2841
2842         pci_enable_wake(pdev, PCI_D3hot, 0);
2843         pci_enable_wake(pdev, PCI_D3cold, 0);
2844
2845         atl1c_reset_mac(&adapter->hw);
2846
2847         return PCI_ERS_RESULT_RECOVERED;
2848 }
2849
2850 /*
2851  * atl1c_io_resume - called when traffic can start flowing again.
2852  * @pdev: Pointer to PCI device
2853  *
2854  * This callback is called when the error recovery driver tells us that
2855  * its OK to resume normal operation. Implementation resembles the
2856  * second-half of the atl1c_resume routine.
2857  */
2858 static void atl1c_io_resume(struct pci_dev *pdev)
2859 {
2860         struct net_device *netdev = pci_get_drvdata(pdev);
2861         struct atl1c_adapter *adapter = netdev_priv(netdev);
2862
2863         if (netif_running(netdev)) {
2864                 if (atl1c_up(adapter)) {
2865                         if (netif_msg_hw(adapter))
2866                                 dev_err(&pdev->dev,
2867                                         "Cannot bring device back up after reset\n");
2868                         return;
2869                 }
2870         }
2871
2872         netif_device_attach(netdev);
2873 }
2874
2875 static struct pci_error_handlers atl1c_err_handler = {
2876         .error_detected = atl1c_io_error_detected,
2877         .slot_reset = atl1c_io_slot_reset,
2878         .resume = atl1c_io_resume,
2879 };
2880
2881 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2882
2883 static struct pci_driver atl1c_driver = {
2884         .name     = atl1c_driver_name,
2885         .id_table = atl1c_pci_tbl,
2886         .probe    = atl1c_probe,
2887         .remove   = __devexit_p(atl1c_remove),
2888         .shutdown = atl1c_shutdown,
2889         .err_handler = &atl1c_err_handler,
2890         .driver.pm = &atl1c_pm_ops,
2891 };
2892
2893 /*
2894  * atl1c_init_module - Driver Registration Routine
2895  *
2896  * atl1c_init_module is the first routine called when the driver is
2897  * loaded. All it does is register with the PCI subsystem.
2898  */
2899 static int __init atl1c_init_module(void)
2900 {
2901         return pci_register_driver(&atl1c_driver);
2902 }
2903
2904 /*
2905  * atl1c_exit_module - Driver Exit Cleanup Routine
2906  *
2907  * atl1c_exit_module is called just before the driver is removed
2908  * from memory.
2909  */
2910 static void __exit atl1c_exit_module(void)
2911 {
2912         pci_unregister_driver(&atl1c_driver);
2913 }
2914
2915 module_init(atl1c_init_module);
2916 module_exit(atl1c_exit_module);