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