drivers/net/atl1c/atl1c_main.c

   1 /*
   2  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1c.h"
  23
  24 #define ATL1C_DRV_VERSION "1.0.1.0-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27 #define PCI_DEVICE_ID_ATTANSIC_L2C      0x1062
  28 #define PCI_DEVICE_ID_ATTANSIC_L1C      0x1063
  29 #define PCI_DEVICE_ID_ATHEROS_L2C_B     0x2060 /* AR8152 v1.1 Fast 10/100 */
  30 #define PCI_DEVICE_ID_ATHEROS_L2C_B2    0x2062 /* AR8152 v2.0 Fast 10/100 */
  31 #define PCI_DEVICE_ID_ATHEROS_L1D       0x1073 /* AR8151 v1.0 Gigabit 1000 */
  32 #define PCI_DEVICE_ID_ATHEROS_L1D_2_0   0x1083 /* AR8151 v2.0 Gigabit 1000 */
  33 #define L2CB_V10                        0xc0
  34 #define L2CB_V11                        0xc1
  35
  36 /*
  37  * atl1c_pci_tbl - PCI Device ID Table
  38  *
  39  * Wildcard entries (PCI_ANY_ID) should come last
  40  * Last entry must be all 0s
  41  *
  42  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  43  *   Class, Class Mask, private data (not used) }
  44  */
  45 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = {
  46         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  47         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  48         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  49         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  50         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  51         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  52         /* required last entry */
  53         { 0 }
  54 };
  55 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  56
  57 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
  58 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  59 MODULE_LICENSE("GPL");
  60 MODULE_VERSION(ATL1C_DRV_VERSION);
  61
  62 static int atl1c_stop_mac(struct atl1c_hw *hw);
  63 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
  64 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
  65 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  66 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
  67 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
  68 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
  69                    int *work_done, int work_to_do);
  70 static int atl1c_up(struct atl1c_adapter *adapter);
  71 static void atl1c_down(struct atl1c_adapter *adapter);
  72
  73 static const u16 atl1c_pay_load_size[] = {
  74         128, 256, 512, 1024, 2048, 4096,
  75 };
  76
  77 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
  78 {
  79         REG_MB_RFD0_PROD_IDX,
  80         REG_MB_RFD1_PROD_IDX,
  81         REG_MB_RFD2_PROD_IDX,
  82         REG_MB_RFD3_PROD_IDX
  83 };
  84
  85 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  86 {
  87         REG_RFD0_HEAD_ADDR_LO,
  88         REG_RFD1_HEAD_ADDR_LO,
  89         REG_RFD2_HEAD_ADDR_LO,
  90         REG_RFD3_HEAD_ADDR_LO
  91 };
  92
  93 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  94 {
  95         REG_RRD0_HEAD_ADDR_LO,
  96         REG_RRD1_HEAD_ADDR_LO,
  97         REG_RRD2_HEAD_ADDR_LO,
  98         REG_RRD3_HEAD_ADDR_LO
  99 };
 100
 101 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
 102         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
 103 static void atl1c_pcie_patch(struct atl1c_hw *hw)
 104 {
 105         u32 data;
 106
 107         AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
 108         data |= PCIE_PHYMISC_FORCE_RCV_DET;
 109         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
 110
 111         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
 112                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
 113
 114                 data &= ~(PCIE_PHYMISC2_SERDES_CDR_MASK <<
 115                         PCIE_PHYMISC2_SERDES_CDR_SHIFT);
 116                 data |= 3 << PCIE_PHYMISC2_SERDES_CDR_SHIFT;
 117                 data &= ~(PCIE_PHYMISC2_SERDES_TH_MASK <<
 118                         PCIE_PHYMISC2_SERDES_TH_SHIFT);
 119                 data |= 3 << PCIE_PHYMISC2_SERDES_TH_SHIFT;
 120                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
 121         }
 122 }
 123
 124 /* FIXME: no need any more ? */
 125 /*
 126  * atl1c_init_pcie - init PCIE module
 127  */
 128 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 129 {
 130         u32 data;
 131         u32 pci_cmd;
 132         struct pci_dev *pdev = hw->adapter->pdev;
 133
 134         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 135         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 136         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 137                 PCI_COMMAND_IO);
 138         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 139
 140         /*
 141          * Clear any PowerSaveing Settings
 142          */
 143         pci_enable_wake(pdev, PCI_D3hot, 0);
 144         pci_enable_wake(pdev, PCI_D3cold, 0);
 145
 146         /*
 147          * Mask some pcie error bits
 148          */
 149         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
 150         data &= ~PCIE_UC_SERVRITY_DLP;
 151         data &= ~PCIE_UC_SERVRITY_FCP;
 152         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
 153
 154         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 155         data &= ~LTSSM_ID_EN_WRO;
 156         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 157
 158         atl1c_pcie_patch(hw);
 159         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 160                 atl1c_disable_l0s_l1(hw);
 161         if (flag & ATL1C_PCIE_PHY_RESET)
 162                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 163         else
 164                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 165                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 166
 167         msleep(5);
 168 }
 169
 170 /*
 171  * atl1c_irq_enable - Enable default interrupt generation settings
 172  * @adapter: board private structure
 173  */
 174 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 175 {
 176         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 177                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 178                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 179                 AT_WRITE_FLUSH(&adapter->hw);
 180         }
 181 }
 182
 183 /*
 184  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 185  * @adapter: board private structure
 186  */
 187 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 188 {
 189         atomic_inc(&adapter->irq_sem);
 190         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 191         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 192         AT_WRITE_FLUSH(&adapter->hw);
 193         synchronize_irq(adapter->pdev->irq);
 194 }
 195
 196 /*
 197  * atl1c_irq_reset - reset interrupt confiure on the NIC
 198  * @adapter: board private structure
 199  */
 200 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 201 {
 202         atomic_set(&adapter->irq_sem, 1);
 203         atl1c_irq_enable(adapter);
 204 }
 205
 206 /*
 207  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 208  * of the idle status register until the device is actually idle
 209  */
 210 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
 211 {
 212         int timeout;
 213         u32 data;
 214
 215         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 216                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 217                 if ((data & IDLE_STATUS_MASK) == 0)
 218                         return 0;
 219                 msleep(1);
 220         }
 221         return data;
 222 }
 223
 224 /*
 225  * atl1c_phy_config - Timer Call-back
 226  * @data: pointer to netdev cast into an unsigned long
 227  */
 228 static void atl1c_phy_config(unsigned long data)
 229 {
 230         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 231         struct atl1c_hw *hw = &adapter->hw;
 232         unsigned long flags;
 233
 234         spin_lock_irqsave(&adapter->mdio_lock, flags);
 235         atl1c_restart_autoneg(hw);
 236         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 237 }
 238
 239 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 240 {
 241         WARN_ON(in_interrupt());
 242         atl1c_down(adapter);
 243         atl1c_up(adapter);
 244         clear_bit(__AT_RESETTING, &adapter->flags);
 245 }
 246
 247 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 248 {
 249         struct atl1c_hw *hw = &adapter->hw;
 250         struct net_device *netdev = adapter->netdev;
 251         struct pci_dev    *pdev   = adapter->pdev;
 252         int err;
 253         unsigned long flags;
 254         u16 speed, duplex, phy_data;
 255
 256         spin_lock_irqsave(&adapter->mdio_lock, flags);
 257         /* MII_BMSR must read twise */
 258         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 259         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 260         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 261
 262         if ((phy_data & BMSR_LSTATUS) == 0) {
 263                 /* link down */
 264                 hw->hibernate = true;
 265                 if (atl1c_stop_mac(hw) != 0)
 266                         if (netif_msg_hw(adapter))
 267                                 dev_warn(&pdev->dev, "stop mac failed\n");
 268                 atl1c_set_aspm(hw, false);
 269                 netif_carrier_off(netdev);
 270                 netif_stop_queue(netdev);
 271                 atl1c_phy_reset(hw);
 272                 atl1c_phy_init(&adapter->hw);
 273         } else {
 274                 /* Link Up */
 275                 hw->hibernate = false;
 276                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 277                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 278                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 279                 if (unlikely(err))
 280                         return;
 281                 /* link result is our setting */
 282                 if (adapter->link_speed != speed ||
 283                     adapter->link_duplex != duplex) {
 284                         adapter->link_speed  = speed;
 285                         adapter->link_duplex = duplex;
 286                         atl1c_set_aspm(hw, true);
 287                         atl1c_enable_tx_ctrl(hw);
 288                         atl1c_enable_rx_ctrl(hw);
 289                         atl1c_setup_mac_ctrl(adapter);
 290                         if (netif_msg_link(adapter))
 291                                 dev_info(&pdev->dev,
 292                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 293                                         atl1c_driver_name, netdev->name,
 294                                         adapter->link_speed,
 295                                         adapter->link_duplex == FULL_DUPLEX ?
 296                                         "Full Duplex" : "Half Duplex");
 297                 }
 298                 if (!netif_carrier_ok(netdev))
 299                         netif_carrier_on(netdev);
 300         }
 301 }
 302
 303 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 304 {
 305         struct net_device *netdev = adapter->netdev;
 306         struct pci_dev    *pdev   = adapter->pdev;
 307         u16 phy_data;
 308         u16 link_up;
 309
 310         spin_lock(&adapter->mdio_lock);
 311         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 312         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 313         spin_unlock(&adapter->mdio_lock);
 314         link_up = phy_data & BMSR_LSTATUS;
 315         /* notify upper layer link down ASAP */
 316         if (!link_up) {
 317                 if (netif_carrier_ok(netdev)) {
 318                         /* old link state: Up */
 319                         netif_carrier_off(netdev);
 320                         if (netif_msg_link(adapter))
 321                                 dev_info(&pdev->dev,
 322                                         "%s: %s NIC Link is Down\n",
 323                                         atl1c_driver_name, netdev->name);
 324                         adapter->link_speed = SPEED_0;
 325                 }
 326         }
 327
 328         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 329         schedule_work(&adapter->common_task);
 330 }
 331
 332 static void atl1c_common_task(struct work_struct *work)
 333 {
 334         struct atl1c_adapter *adapter;
 335         struct net_device *netdev;
 336
 337         adapter = container_of(work, struct atl1c_adapter, common_task);
 338         netdev = adapter->netdev;
 339
 340         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 341                 netif_device_detach(netdev);
 342                 atl1c_down(adapter);
 343                 atl1c_up(adapter);
 344                 netif_device_attach(netdev);
 345         }
 346
 347         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 348                 &adapter->work_event))
 349                 atl1c_check_link_status(adapter);
 350 }
 351
 352
 353 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 354 {
 355         del_timer_sync(&adapter->phy_config_timer);
 356 }
 357
 358
 359 /*
 360  * atl1c_tx_timeout - Respond to a Tx Hang
 361  * @netdev: network interface device structure
 362  */
 363 static void atl1c_tx_timeout(struct net_device *netdev)
 364 {
 365         struct atl1c_adapter *adapter = netdev_priv(netdev);
 366
 367         /* Do the reset outside of interrupt context */
 368         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 369         schedule_work(&adapter->common_task);
 370 }
 371
 372 /*
 373  * atl1c_set_multi - Multicast and Promiscuous mode set
 374  * @netdev: network interface device structure
 375  *
 376  * The set_multi entry point is called whenever the multicast address
 377  * list or the network interface flags are updated.  This routine is
 378  * responsible for configuring the hardware for proper multicast,
 379  * promiscuous mode, and all-multi behavior.
 380  */
 381 static void atl1c_set_multi(struct net_device *netdev)
 382 {
 383         struct atl1c_adapter *adapter = netdev_priv(netdev);
 384         struct atl1c_hw *hw = &adapter->hw;
 385         struct netdev_hw_addr *ha;
 386         u32 mac_ctrl_data;
 387         u32 hash_value;
 388
 389         /* Check for Promiscuous and All Multicast modes */
 390         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 391
 392         if (netdev->flags & IFF_PROMISC) {
 393                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 394         } else if (netdev->flags & IFF_ALLMULTI) {
 395                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 396                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 397         } else {
 398                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 399         }
 400
 401         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 402
 403         /* clear the old settings from the multicast hash table */
 404         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 405         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 406
 407         /* comoute mc addresses' hash value ,and put it into hash table */
 408         netdev_for_each_mc_addr(ha, netdev) {
 409                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 410                 atl1c_hash_set(hw, hash_value);
 411         }
 412 }
 413
 414 static void __atl1c_vlan_mode(u32 features, u32 *mac_ctrl_data)
 415 {
 416         if (features & NETIF_F_HW_VLAN_RX) {
 417                 /* enable VLAN tag insert/strip */
 418                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 419         } else {
 420                 /* disable VLAN tag insert/strip */
 421                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 422         }
 423 }
 424
 425 static void atl1c_vlan_mode(struct net_device *netdev, u32 features)
 426 {
 427         struct atl1c_adapter *adapter = netdev_priv(netdev);
 428         struct pci_dev *pdev = adapter->pdev;
 429         u32 mac_ctrl_data = 0;
 430
 431         if (netif_msg_pktdata(adapter))
 432                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 433
 434         atl1c_irq_disable(adapter);
 435         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 436         __atl1c_vlan_mode(features, &mac_ctrl_data);
 437         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 438         atl1c_irq_enable(adapter);
 439 }
 440
 441 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 442 {
 443         struct pci_dev *pdev = adapter->pdev;
 444
 445         if (netif_msg_pktdata(adapter))
 446                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 447         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 448 }
 449
 450 /*
 451  * atl1c_set_mac - Change the Ethernet Address of the NIC
 452  * @netdev: network interface device structure
 453  * @p: pointer to an address structure
 454  *
 455  * Returns 0 on success, negative on failure
 456  */
 457 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 458 {
 459         struct atl1c_adapter *adapter = netdev_priv(netdev);
 460         struct sockaddr *addr = p;
 461
 462         if (!is_valid_ether_addr(addr->sa_data))
 463                 return -EADDRNOTAVAIL;
 464
 465         if (netif_running(netdev))
 466                 return -EBUSY;
 467
 468         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 469         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 470
 471         atl1c_hw_set_mac_addr(&adapter->hw);
 472
 473         return 0;
 474 }
 475
 476 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 477                                 struct net_device *dev)
 478 {
 479         int mtu = dev->mtu;
 480
 481         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 482                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 483 }
 484
 485 static u32 atl1c_fix_features(struct net_device *netdev, u32 features)
 486 {
 487         /*
 488          * Since there is no support for separate rx/tx vlan accel
 489          * enable/disable make sure tx flag is always in same state as rx.
 490          */
 491         if (features & NETIF_F_HW_VLAN_RX)
 492                 features |= NETIF_F_HW_VLAN_TX;
 493         else
 494                 features &= ~NETIF_F_HW_VLAN_TX;
 495
 496         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 497                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 498
 499         return features;
 500 }
 501
 502 static int atl1c_set_features(struct net_device *netdev, u32 features)
 503 {
 504         u32 changed = netdev->features ^ features;
 505
 506         if (changed & NETIF_F_HW_VLAN_RX)
 507                 atl1c_vlan_mode(netdev, features);
 508
 509         return 0;
 510 }
 511
 512 /*
 513  * atl1c_change_mtu - Change the Maximum Transfer Unit
 514  * @netdev: network interface device structure
 515  * @new_mtu: new value for maximum frame size
 516  *
 517  * Returns 0 on success, negative on failure
 518  */
 519 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 520 {
 521         struct atl1c_adapter *adapter = netdev_priv(netdev);
 522         int old_mtu   = netdev->mtu;
 523         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 524
 525         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 526                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 527                 if (netif_msg_link(adapter))
 528                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 529                 return -EINVAL;
 530         }
 531         /* set MTU */
 532         if (old_mtu != new_mtu && netif_running(netdev)) {
 533                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 534                         msleep(1);
 535                 netdev->mtu = new_mtu;
 536                 adapter->hw.max_frame_size = new_mtu;
 537                 atl1c_set_rxbufsize(adapter, netdev);
 538                 atl1c_down(adapter);
 539                 netdev_update_features(netdev);
 540                 atl1c_up(adapter);
 541                 clear_bit(__AT_RESETTING, &adapter->flags);
 542                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 543                         u32 phy_data;
 544
 545                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 546                         phy_data |= 0x10000000;
 547                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 548                 }
 549
 550         }
 551         return 0;
 552 }
 553
 554 /*
 555  *  caller should hold mdio_lock
 556  */
 557 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 558 {
 559         struct atl1c_adapter *adapter = netdev_priv(netdev);
 560         u16 result;
 561
 562         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 563         return result;
 564 }
 565
 566 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 567                              int reg_num, int val)
 568 {
 569         struct atl1c_adapter *adapter = netdev_priv(netdev);
 570
 571         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 572 }
 573
 574 /*
 575  * atl1c_mii_ioctl -
 576  * @netdev:
 577  * @ifreq:
 578  * @cmd:
 579  */
 580 static int atl1c_mii_ioctl(struct net_device *netdev,
 581                            struct ifreq *ifr, int cmd)
 582 {
 583         struct atl1c_adapter *adapter = netdev_priv(netdev);
 584         struct pci_dev *pdev = adapter->pdev;
 585         struct mii_ioctl_data *data = if_mii(ifr);
 586         unsigned long flags;
 587         int retval = 0;
 588
 589         if (!netif_running(netdev))
 590                 return -EINVAL;
 591
 592         spin_lock_irqsave(&adapter->mdio_lock, flags);
 593         switch (cmd) {
 594         case SIOCGMIIPHY:
 595                 data->phy_id = 0;
 596                 break;
 597
 598         case SIOCGMIIREG:
 599                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 600                                     &data->val_out)) {
 601                         retval = -EIO;
 602                         goto out;
 603                 }
 604                 break;
 605
 606         case SIOCSMIIREG:
 607                 if (data->reg_num & ~(0x1F)) {
 608                         retval = -EFAULT;
 609                         goto out;
 610                 }
 611
 612                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 613                                 data->reg_num, data->val_in);
 614                 if (atl1c_write_phy_reg(&adapter->hw,
 615                                      data->reg_num, data->val_in)) {
 616                         retval = -EIO;
 617                         goto out;
 618                 }
 619                 break;
 620
 621         default:
 622                 retval = -EOPNOTSUPP;
 623                 break;
 624         }
 625 out:
 626         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 627         return retval;
 628 }
 629
 630 /*
 631  * atl1c_ioctl -
 632  * @netdev:
 633  * @ifreq:
 634  * @cmd:
 635  */
 636 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 637 {
 638         switch (cmd) {
 639         case SIOCGMIIPHY:
 640         case SIOCGMIIREG:
 641         case SIOCSMIIREG:
 642                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 643         default:
 644                 return -EOPNOTSUPP;
 645         }
 646 }
 647
 648 /*
 649  * atl1c_alloc_queues - Allocate memory for all rings
 650  * @adapter: board private structure to initialize
 651  *
 652  */
 653 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 654 {
 655         return 0;
 656 }
 657
 658 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 659 {
 660         switch (hw->device_id) {
 661         case PCI_DEVICE_ID_ATTANSIC_L2C:
 662                 hw->nic_type = athr_l2c;
 663                 break;
 664         case PCI_DEVICE_ID_ATTANSIC_L1C:
 665                 hw->nic_type = athr_l1c;
 666                 break;
 667         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 668                 hw->nic_type = athr_l2c_b;
 669                 break;
 670         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 671                 hw->nic_type = athr_l2c_b2;
 672                 break;
 673         case PCI_DEVICE_ID_ATHEROS_L1D:
 674                 hw->nic_type = athr_l1d;
 675                 break;
 676         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 677                 hw->nic_type = athr_l1d_2;
 678                 break;
 679         default:
 680                 break;
 681         }
 682 }
 683
 684 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 685 {
 686         u32 phy_status_data;
 687         u32 link_ctrl_data;
 688
 689         atl1c_set_mac_type(hw);
 690         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 691         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 692
 693         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 694                          ATL1C_TXQ_MODE_ENHANCE;
 695         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 696                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 697         if (link_ctrl_data & LINK_CTRL_L1_EN)
 698                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 699         if (link_ctrl_data & LINK_CTRL_EXT_SYNC)
 700                 hw->ctrl_flags |= ATL1C_LINK_EXT_SYNC;
 701         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 702
 703         if (hw->nic_type == athr_l1c ||
 704             hw->nic_type == athr_l1d ||
 705             hw->nic_type == athr_l1d_2)
 706                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 707         return 0;
 708 }
 709 /*
 710  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 711  * @adapter: board private structure to initialize
 712  *
 713  * atl1c_sw_init initializes the Adapter private data structure.
 714  * Fields are initialized based on PCI device information and
 715  * OS network device settings (MTU size).
 716  */
 717 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 718 {
 719         struct atl1c_hw *hw   = &adapter->hw;
 720         struct pci_dev  *pdev = adapter->pdev;
 721         u32 revision;
 722
 723
 724         adapter->wol = 0;
 725         device_set_wakeup_enable(&pdev->dev, false);
 726         adapter->link_speed = SPEED_0;
 727         adapter->link_duplex = FULL_DUPLEX;
 728         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
 729         adapter->tpd_ring[0].count = 1024;
 730         adapter->rfd_ring[0].count = 512;
 731
 732         hw->vendor_id = pdev->vendor;
 733         hw->device_id = pdev->device;
 734         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 735         hw->subsystem_id = pdev->subsystem_device;
 736         AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
 737         hw->revision_id = revision & 0xFF;
 738         /* before link up, we assume hibernate is true */
 739         hw->hibernate = true;
 740         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 741         if (atl1c_setup_mac_funcs(hw) != 0) {
 742                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 743                 return -1;
 744         }
 745         hw->intr_mask = IMR_NORMAL_MASK;
 746         hw->phy_configured = false;
 747         hw->preamble_len = 7;
 748         hw->max_frame_size = adapter->netdev->mtu;
 749         if (adapter->num_rx_queues < 2) {
 750                 hw->rss_type = atl1c_rss_disable;
 751                 hw->rss_mode = atl1c_rss_mode_disable;
 752         } else {
 753                 hw->rss_type = atl1c_rss_ipv4;
 754                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
 755                 hw->rss_hash_bits = 16;
 756         }
 757         hw->autoneg_advertised = ADVERTISED_Autoneg;
 758         hw->indirect_tab = 0xE4E4E4E4;
 759         hw->base_cpu = 0;
 760
 761         hw->ict = 50000;                /* 100ms */
 762         hw->smb_timer = 200000;         /* 400ms */
 763         hw->cmb_tpd = 4;
 764         hw->cmb_tx_timer = 1;           /* 2 us  */
 765         hw->rx_imt = 200;
 766         hw->tx_imt = 1000;
 767
 768         hw->tpd_burst = 5;
 769         hw->rfd_burst = 8;
 770         hw->dma_order = atl1c_dma_ord_out;
 771         hw->dmar_block = atl1c_dma_req_1024;
 772         hw->dmaw_block = atl1c_dma_req_1024;
 773         hw->dmar_dly_cnt = 15;
 774         hw->dmaw_dly_cnt = 4;
 775
 776         if (atl1c_alloc_queues(adapter)) {
 777                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 778                 return -ENOMEM;
 779         }
 780         /* TODO */
 781         atl1c_set_rxbufsize(adapter, adapter->netdev);
 782         atomic_set(&adapter->irq_sem, 1);
 783         spin_lock_init(&adapter->mdio_lock);
 784         spin_lock_init(&adapter->tx_lock);
 785         set_bit(__AT_DOWN, &adapter->flags);
 786
 787         return 0;
 788 }
 789
 790 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 791                                 struct atl1c_buffer *buffer_info, int in_irq)
 792 {
 793         u16 pci_driection;
 794         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 795                 return;
 796         if (buffer_info->dma) {
 797                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 798                         pci_driection = PCI_DMA_FROMDEVICE;
 799                 else
 800                         pci_driection = PCI_DMA_TODEVICE;
 801
 802                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 803                         pci_unmap_single(pdev, buffer_info->dma,
 804                                         buffer_info->length, pci_driection);
 805                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 806                         pci_unmap_page(pdev, buffer_info->dma,
 807                                         buffer_info->length, pci_driection);
 808         }
 809         if (buffer_info->skb) {
 810                 if (in_irq)
 811                         dev_kfree_skb_irq(buffer_info->skb);
 812                 else
 813                         dev_kfree_skb(buffer_info->skb);
 814         }
 815         buffer_info->dma = 0;
 816         buffer_info->skb = NULL;
 817         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 818 }
 819 /*
 820  * atl1c_clean_tx_ring - Free Tx-skb
 821  * @adapter: board private structure
 822  */
 823 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 824                                 enum atl1c_trans_queue type)
 825 {
 826         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 827         struct atl1c_buffer *buffer_info;
 828         struct pci_dev *pdev = adapter->pdev;
 829         u16 index, ring_count;
 830
 831         ring_count = tpd_ring->count;
 832         for (index = 0; index < ring_count; index++) {
 833                 buffer_info = &tpd_ring->buffer_info[index];
 834                 atl1c_clean_buffer(pdev, buffer_info, 0);
 835         }
 836
 837         /* Zero out Tx-buffers */
 838         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 839                 ring_count);
 840         atomic_set(&tpd_ring->next_to_clean, 0);
 841         tpd_ring->next_to_use = 0;
 842 }
 843
 844 /*
 845  * atl1c_clean_rx_ring - Free rx-reservation skbs
 846  * @adapter: board private structure
 847  */
 848 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 849 {
 850         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 851         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 852         struct atl1c_buffer *buffer_info;
 853         struct pci_dev *pdev = adapter->pdev;
 854         int i, j;
 855
 856         for (i = 0; i < adapter->num_rx_queues; i++) {
 857                 for (j = 0; j < rfd_ring[i].count; j++) {
 858                         buffer_info = &rfd_ring[i].buffer_info[j];
 859                         atl1c_clean_buffer(pdev, buffer_info, 0);
 860                 }
 861                 /* zero out the descriptor ring */
 862                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
 863                 rfd_ring[i].next_to_clean = 0;
 864                 rfd_ring[i].next_to_use = 0;
 865                 rrd_ring[i].next_to_use = 0;
 866                 rrd_ring[i].next_to_clean = 0;
 867         }
 868 }
 869
 870 /*
 871  * Read / Write Ptr Initialize:
 872  */
 873 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 874 {
 875         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 876         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 877         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 878         struct atl1c_buffer *buffer_info;
 879         int i, j;
 880
 881         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 882                 tpd_ring[i].next_to_use = 0;
 883                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 884                 buffer_info = tpd_ring[i].buffer_info;
 885                 for (j = 0; j < tpd_ring->count; j++)
 886                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 887                                         ATL1C_BUFFER_FREE);
 888         }
 889         for (i = 0; i < adapter->num_rx_queues; i++) {
 890                 rfd_ring[i].next_to_use = 0;
 891                 rfd_ring[i].next_to_clean = 0;
 892                 rrd_ring[i].next_to_use = 0;
 893                 rrd_ring[i].next_to_clean = 0;
 894                 for (j = 0; j < rfd_ring[i].count; j++) {
 895                         buffer_info = &rfd_ring[i].buffer_info[j];
 896                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 897                 }
 898         }
 899 }
 900
 901 /*
 902  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 903  * @adapter: board private structure
 904  *
 905  * Free all transmit software resources
 906  */
 907 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 908 {
 909         struct pci_dev *pdev = adapter->pdev;
 910
 911         pci_free_consistent(pdev, adapter->ring_header.size,
 912                                         adapter->ring_header.desc,
 913                                         adapter->ring_header.dma);
 914         adapter->ring_header.desc = NULL;
 915
 916         /* Note: just free tdp_ring.buffer_info,
 917         *  it contain rfd_ring.buffer_info, do not double free */
 918         if (adapter->tpd_ring[0].buffer_info) {
 919                 kfree(adapter->tpd_ring[0].buffer_info);
 920                 adapter->tpd_ring[0].buffer_info = NULL;
 921         }
 922 }
 923
 924 /*
 925  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 926  * @adapter: board private structure
 927  *
 928  * Return 0 on success, negative on failure
 929  */
 930 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 931 {
 932         struct pci_dev *pdev = adapter->pdev;
 933         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 934         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 935         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 936         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 937         int num_rx_queues = adapter->num_rx_queues;
 938         int size;
 939         int i;
 940         int count = 0;
 941         int rx_desc_count = 0;
 942         u32 offset = 0;
 943
 944         rrd_ring[0].count = rfd_ring[0].count;
 945         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 946                 tpd_ring[i].count = tpd_ring[0].count;
 947
 948         for (i = 1; i < adapter->num_rx_queues; i++)
 949                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
 950
 951         /* 2 tpd queue, one high priority queue,
 952          * another normal priority queue */
 953         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 954                 rfd_ring->count * num_rx_queues);
 955         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 956         if (unlikely(!tpd_ring->buffer_info)) {
 957                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 958                         size);
 959                 goto err_nomem;
 960         }
 961         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 962                 tpd_ring[i].buffer_info =
 963                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 964                 count += tpd_ring[i].count;
 965         }
 966
 967         for (i = 0; i < num_rx_queues; i++) {
 968                 rfd_ring[i].buffer_info =
 969                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 970                 count += rfd_ring[i].count;
 971                 rx_desc_count += rfd_ring[i].count;
 972         }
 973         /*
 974          * real ring DMA buffer
 975          * each ring/block may need up to 8 bytes for alignment, hence the
 976          * additional bytes tacked onto the end.
 977          */
 978         ring_header->size = size =
 979                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 980                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 981                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 982                 sizeof(struct atl1c_hw_stats) +
 983                 8 * 4 + 8 * 2 * num_rx_queues;
 984
 985         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 986                                 &ring_header->dma);
 987         if (unlikely(!ring_header->desc)) {
 988                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 989                 goto err_nomem;
 990         }
 991         memset(ring_header->desc, 0, ring_header->size);
 992         /* init TPD ring */
 993
 994         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 995         offset = tpd_ring[0].dma - ring_header->dma;
 996         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 997                 tpd_ring[i].dma = ring_header->dma + offset;
 998                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 999                 tpd_ring[i].size =
1000                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1001                 offset += roundup(tpd_ring[i].size, 8);
1002         }
1003         /* init RFD ring */
1004         for (i = 0; i < num_rx_queues; i++) {
1005                 rfd_ring[i].dma = ring_header->dma + offset;
1006                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
1007                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
1008                                 rfd_ring[i].count;
1009                 offset += roundup(rfd_ring[i].size, 8);
1010         }
1011
1012         /* init RRD ring */
1013         for (i = 0; i < num_rx_queues; i++) {
1014                 rrd_ring[i].dma = ring_header->dma + offset;
1015                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
1016                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
1017                                 rrd_ring[i].count;
1018                 offset += roundup(rrd_ring[i].size, 8);
1019         }
1020
1021         adapter->smb.dma = ring_header->dma + offset;
1022         adapter->smb.smb = (u8 *)ring_header->desc + offset;
1023         return 0;
1024
1025 err_nomem:
1026         kfree(tpd_ring->buffer_info);
1027         return -ENOMEM;
1028 }
1029
1030 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1031 {
1032         struct atl1c_hw *hw = &adapter->hw;
1033         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
1034                                 adapter->rfd_ring;
1035         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
1036                                 adapter->rrd_ring;
1037         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1038                                 adapter->tpd_ring;
1039         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
1040         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
1041         int i;
1042         u32 data;
1043
1044         /* TPD */
1045         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1046                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1047                                 AT_DMA_HI_ADDR_MASK) >> 32));
1048         /* just enable normal priority TX queue */
1049         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
1050                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1051                                 AT_DMA_LO_ADDR_MASK));
1052         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
1053                         (u32)(tpd_ring[atl1c_trans_high].dma &
1054                                 AT_DMA_LO_ADDR_MASK));
1055         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1056                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1057
1058
1059         /* RFD */
1060         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1061                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
1062         for (i = 0; i < adapter->num_rx_queues; i++)
1063                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
1064                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1065
1066         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1067                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
1068         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1069                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1070
1071         /* RRD */
1072         for (i = 0; i < adapter->num_rx_queues; i++)
1073                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
1074                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1075         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1076                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
1077
1078         /* CMB */
1079         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
1080
1081         /* SMB */
1082         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
1083                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1084         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
1085                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
1086         if (hw->nic_type == athr_l2c_b) {
1087                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1088                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1089                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1090                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1091                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1092                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1093                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1094                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1095         }
1096         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d_2) {
1097                         /* Power Saving for L2c_B */
1098                 AT_READ_REG(hw, REG_SERDES_LOCK, &data);
1099                 data |= SERDES_MAC_CLK_SLOWDOWN;
1100                 data |= SERDES_PYH_CLK_SLOWDOWN;
1101                 AT_WRITE_REG(hw, REG_SERDES_LOCK, data);
1102         }
1103         /* Load all of base address above */
1104         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1105 }
1106
1107 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1108 {
1109         struct atl1c_hw *hw = &adapter->hw;
1110         u32 dev_ctrl_data;
1111         u32 max_pay_load;
1112         u16 tx_offload_thresh;
1113         u32 txq_ctrl_data;
1114         u32 max_pay_load_data;
1115
1116         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1117         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1118                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1119         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1120         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1121                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1122         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
1123         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1124                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1125         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1126
1127         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1128                         TXQ_NUM_TPD_BURST_SHIFT;
1129         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1130                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1131         max_pay_load_data = (atl1c_pay_load_size[hw->dmar_block] &
1132                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1133         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2)
1134                 max_pay_load_data >>= 1;
1135         txq_ctrl_data |= max_pay_load_data;
1136
1137         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1138 }
1139
1140 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1141 {
1142         struct atl1c_hw *hw = &adapter->hw;
1143         u32 rxq_ctrl_data;
1144
1145         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1146                         RXQ_RFD_BURST_NUM_SHIFT;
1147
1148         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1149                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1150         if (hw->rss_type == atl1c_rss_ipv4)
1151                 rxq_ctrl_data |= RSS_HASH_IPV4;
1152         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1153                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1154         if (hw->rss_type == atl1c_rss_ipv6)
1155                 rxq_ctrl_data |= RSS_HASH_IPV6;
1156         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1157                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1158         if (hw->rss_type != atl1c_rss_disable)
1159                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1160
1161         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1162                         RSS_MODE_SHIFT;
1163         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1164                         RSS_HASH_BITS_SHIFT;
1165         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1166                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_1M &
1167                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1168
1169         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1170 }
1171
1172 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1173 {
1174         struct atl1c_hw *hw = &adapter->hw;
1175
1176         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1177         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1178 }
1179
1180 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1181 {
1182         struct atl1c_hw *hw = &adapter->hw;
1183         u32 dma_ctrl_data;
1184
1185         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1186         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1187                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1188         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1189                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1190         else
1191                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1192
1193         switch (hw->dma_order) {
1194         case atl1c_dma_ord_in:
1195                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1196                 break;
1197         case atl1c_dma_ord_enh:
1198                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1199                 break;
1200         case atl1c_dma_ord_out:
1201                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1202                 break;
1203         default:
1204                 break;
1205         }
1206
1207         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1208                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1209         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1210                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1211         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1212                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1213         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1214                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1215
1216         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1217 }
1218
1219 /*
1220  * Stop the mac, transmit and receive units
1221  * hw - Struct containing variables accessed by shared code
1222  * return : 0  or  idle status (if error)
1223  */
1224 static int atl1c_stop_mac(struct atl1c_hw *hw)
1225 {
1226         u32 data;
1227
1228         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1229         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1230                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1231         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1232
1233         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1234         data &= ~TXQ_CTRL_EN;
1235         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1236
1237         atl1c_wait_until_idle(hw);
1238
1239         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1240         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1241         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1242
1243         return (int)atl1c_wait_until_idle(hw);
1244 }
1245
1246 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1247 {
1248         u32 data;
1249
1250         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1251         switch (hw->adapter->num_rx_queues) {
1252         case 4:
1253                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1254                 break;
1255         case 3:
1256                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1257                 break;
1258         case 2:
1259                 data |= RXQ1_CTRL_EN;
1260                 break;
1261         default:
1262                 break;
1263         }
1264         data |= RXQ_CTRL_EN;
1265         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1266 }
1267
1268 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1269 {
1270         u32 data;
1271
1272         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1273         data |= TXQ_CTRL_EN;
1274         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1275 }
1276
1277 /*
1278  * Reset the transmit and receive units; mask and clear all interrupts.
1279  * hw - Struct containing variables accessed by shared code
1280  * return : 0  or  idle status (if error)
1281  */
1282 static int atl1c_reset_mac(struct atl1c_hw *hw)
1283 {
1284         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1285         struct pci_dev *pdev = adapter->pdev;
1286         u32 master_ctrl_data = 0;
1287
1288         AT_WRITE_REG(hw, REG_IMR, 0);
1289         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1290
1291         atl1c_stop_mac(hw);
1292         /*
1293          * Issue Soft Reset to the MAC.  This will reset the chip's
1294          * transmit, receive, DMA.  It will not effect
1295          * the current PCI configuration.  The global reset bit is self-
1296          * clearing, and should clear within a microsecond.
1297          */
1298         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1299         master_ctrl_data |= MASTER_CTRL_OOB_DIS_OFF;
1300         AT_WRITE_REGW(hw, REG_MASTER_CTRL, ((master_ctrl_data | MASTER_CTRL_SOFT_RST)
1301                         & 0xFFFF));
1302
1303         AT_WRITE_FLUSH(hw);
1304         msleep(10);
1305         /* Wait at least 10ms for All module to be Idle */
1306
1307         if (atl1c_wait_until_idle(hw)) {
1308                 dev_err(&pdev->dev,
1309                         "MAC state machine can't be idle since"
1310                         " disabled for 10ms second\n");
1311                 return -1;
1312         }
1313         return 0;
1314 }
1315
1316 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1317 {
1318         u32 pm_ctrl_data;
1319
1320         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1321         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1322                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1323         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1324         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1325         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1326         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1327         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1328
1329         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1330         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1331         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1332         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1333 }
1334
1335 /*
1336  * Set ASPM state.
1337  * Enable/disable L0s/L1 depend on link state.
1338  */
1339 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1340 {
1341         u32 pm_ctrl_data;
1342         u32 link_ctrl_data;
1343         u32 link_l1_timer = 0xF;
1344
1345         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1346         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
1347
1348         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1349         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1350                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1351         pm_ctrl_data &= ~(PM_CTRL_LCKDET_TIMER_MASK <<
1352                         PM_CTRL_LCKDET_TIMER_SHIFT);
1353         pm_ctrl_data |= AT_LCKDET_TIMER << PM_CTRL_LCKDET_TIMER_SHIFT;
1354
1355         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1356                 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1357                 link_ctrl_data &= ~LINK_CTRL_EXT_SYNC;
1358                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE)) {
1359                         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10)
1360                                 link_ctrl_data |= LINK_CTRL_EXT_SYNC;
1361                 }
1362
1363                 AT_WRITE_REG(hw, REG_LINK_CTRL, link_ctrl_data);
1364
1365                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER;
1366                 pm_ctrl_data &= ~(PM_CTRL_PM_REQ_TIMER_MASK <<
1367                         PM_CTRL_PM_REQ_TIMER_SHIFT);
1368                 pm_ctrl_data |= AT_ASPM_L1_TIMER <<
1369                         PM_CTRL_PM_REQ_TIMER_SHIFT;
1370                 pm_ctrl_data &= ~PM_CTRL_SA_DLY_EN;
1371                 pm_ctrl_data &= ~PM_CTRL_HOTRST;
1372                 pm_ctrl_data |= 1 << PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1373                 pm_ctrl_data |= PM_CTRL_SERDES_PD_EX_L1;
1374         }
1375         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1376         if (linkup) {
1377                 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1378                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1379                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1380                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1381                 if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1382                         pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN;
1383
1384                 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1385                         hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1386                         if (hw->nic_type == athr_l2c_b)
1387                                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE))
1388                                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
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                 if (hw->adapter->link_speed == SPEED_100 ||
1394                                 hw->adapter->link_speed == SPEED_1000) {
1395                                 pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1396                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1397                                 if (hw->nic_type == athr_l2c_b)
1398                                         link_l1_timer = 7;
1399                                 else if (hw->nic_type == athr_l2c_b2 ||
1400                                         hw->nic_type == athr_l1d_2)
1401                                         link_l1_timer = 4;
1402                                 pm_ctrl_data |= link_l1_timer <<
1403                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1404                         }
1405                 } else {
1406                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1407                         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1408                         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1409                         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1410                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1411                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1412
1413                 }
1414         } else {
1415                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1416                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1417                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1418                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1419
1420                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1421                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1422                 else
1423                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1424         }
1425         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1426
1427         return;
1428 }
1429
1430 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1431 {
1432         struct atl1c_hw *hw = &adapter->hw;
1433         struct net_device *netdev = adapter->netdev;
1434         u32 mac_ctrl_data;
1435
1436         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1437         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1438
1439         if (adapter->link_duplex == FULL_DUPLEX) {
1440                 hw->mac_duplex = true;
1441                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1442         }
1443
1444         if (adapter->link_speed == SPEED_1000)
1445                 hw->mac_speed = atl1c_mac_speed_1000;
1446         else
1447                 hw->mac_speed = atl1c_mac_speed_10_100;
1448
1449         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1450                         MAC_CTRL_SPEED_SHIFT;
1451
1452         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1453         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1454                         MAC_CTRL_PRMLEN_SHIFT);
1455
1456         __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
1457
1458         mac_ctrl_data |= MAC_CTRL_BC_EN;
1459         if (netdev->flags & IFF_PROMISC)
1460                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1461         if (netdev->flags & IFF_ALLMULTI)
1462                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1463
1464         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1465         if (hw->nic_type == athr_l1d || hw->nic_type == athr_l2c_b2 ||
1466             hw->nic_type == athr_l1d_2) {
1467                 mac_ctrl_data |= MAC_CTRL_SPEED_MODE_SW;
1468                 mac_ctrl_data |= MAC_CTRL_HASH_ALG_CRC32;
1469         }
1470         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1471 }
1472
1473 /*
1474  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1475  * @adapter: board private structure
1476  *
1477  * Configure the Tx /Rx unit of the MAC after a reset.
1478  */
1479 static int atl1c_configure(struct atl1c_adapter *adapter)
1480 {
1481         struct atl1c_hw *hw = &adapter->hw;
1482         u32 master_ctrl_data = 0;
1483         u32 intr_modrt_data;
1484         u32 data;
1485
1486         /* clear interrupt status */
1487         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1488         /*  Clear any WOL status */
1489         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1490         /* set Interrupt Clear Timer
1491          * HW will enable self to assert interrupt event to system after
1492          * waiting x-time for software to notify it accept interrupt.
1493          */
1494
1495         data = CLK_GATING_EN_ALL;
1496         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1497                 if (hw->nic_type == athr_l2c_b)
1498                         data &= ~CLK_GATING_RXMAC_EN;
1499         } else
1500                 data = 0;
1501         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1502
1503         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1504                 hw->ict & INT_RETRIG_TIMER_MASK);
1505
1506         atl1c_configure_des_ring(adapter);
1507
1508         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1509                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1510                                         IRQ_MODRT_TX_TIMER_SHIFT;
1511                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1512                                         IRQ_MODRT_RX_TIMER_SHIFT;
1513                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1514                 master_ctrl_data |=
1515                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1516         }
1517
1518         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1519                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1520
1521         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1522         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1523
1524         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1525                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1526                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1527                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1528                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1529         }
1530
1531         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1532                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1533                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1534         /* set MTU */
1535         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1536                         VLAN_HLEN + ETH_FCS_LEN);
1537         /* HDS, disable */
1538         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1539
1540         atl1c_configure_tx(adapter);
1541         atl1c_configure_rx(adapter);
1542         atl1c_configure_rss(adapter);
1543         atl1c_configure_dma(adapter);
1544
1545         return 0;
1546 }
1547
1548 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1549 {
1550         u16 hw_reg_addr = 0;
1551         unsigned long *stats_item = NULL;
1552         u32 data;
1553
1554         /* update rx status */
1555         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1556         stats_item  = &adapter->hw_stats.rx_ok;
1557         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1558                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1559                 *stats_item += data;
1560                 stats_item++;
1561                 hw_reg_addr += 4;
1562         }
1563 /* update tx status */
1564         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1565         stats_item  = &adapter->hw_stats.tx_ok;
1566         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1567                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1568                 *stats_item += data;
1569                 stats_item++;
1570                 hw_reg_addr += 4;
1571         }
1572 }
1573
1574 /*
1575  * atl1c_get_stats - Get System Network Statistics
1576  * @netdev: network interface device structure
1577  *
1578  * Returns the address of the device statistics structure.
1579  * The statistics are actually updated from the timer callback.
1580  */
1581 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1582 {
1583         struct atl1c_adapter *adapter = netdev_priv(netdev);
1584         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1585         struct net_device_stats *net_stats = &netdev->stats;
1586
1587         atl1c_update_hw_stats(adapter);
1588         net_stats->rx_packets = hw_stats->rx_ok;
1589         net_stats->tx_packets = hw_stats->tx_ok;
1590         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1591         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1592         net_stats->multicast  = hw_stats->rx_mcast;
1593         net_stats->collisions = hw_stats->tx_1_col +
1594                                 hw_stats->tx_2_col * 2 +
1595                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1596         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1597                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1598                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1599         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1600         net_stats->rx_length_errors = hw_stats->rx_len_err;
1601         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1602         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1603         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1604
1605         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1606
1607         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1608                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1609         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1610         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1611         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1612
1613         return net_stats;
1614 }
1615
1616 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1617 {
1618         u16 phy_data;
1619
1620         spin_lock(&adapter->mdio_lock);
1621         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1622         spin_unlock(&adapter->mdio_lock);
1623 }
1624
1625 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1626                                 enum atl1c_trans_queue type)
1627 {
1628         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1629                                 &adapter->tpd_ring[type];
1630         struct atl1c_buffer *buffer_info;
1631         struct pci_dev *pdev = adapter->pdev;
1632         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1633         u16 hw_next_to_clean;
1634         u16 shift;
1635         u32 data;
1636
1637         if (type == atl1c_trans_high)
1638                 shift = MB_HTPD_CONS_IDX_SHIFT;
1639         else
1640                 shift = MB_NTPD_CONS_IDX_SHIFT;
1641
1642         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1643         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1644
1645         while (next_to_clean != hw_next_to_clean) {
1646                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1647                 atl1c_clean_buffer(pdev, buffer_info, 1);
1648                 if (++next_to_clean == tpd_ring->count)
1649                         next_to_clean = 0;
1650                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1651         }
1652
1653         if (netif_queue_stopped(adapter->netdev) &&
1654                         netif_carrier_ok(adapter->netdev)) {
1655                 netif_wake_queue(adapter->netdev);
1656         }
1657
1658         return true;
1659 }
1660
1661 /*
1662  * atl1c_intr - Interrupt Handler
1663  * @irq: interrupt number
1664  * @data: pointer to a network interface device structure
1665  * @pt_regs: CPU registers structure
1666  */
1667 static irqreturn_t atl1c_intr(int irq, void *data)
1668 {
1669         struct net_device *netdev  = data;
1670         struct atl1c_adapter *adapter = netdev_priv(netdev);
1671         struct pci_dev *pdev = adapter->pdev;
1672         struct atl1c_hw *hw = &adapter->hw;
1673         int max_ints = AT_MAX_INT_WORK;
1674         int handled = IRQ_NONE;
1675         u32 status;
1676         u32 reg_data;
1677
1678         do {
1679                 AT_READ_REG(hw, REG_ISR, &reg_data);
1680                 status = reg_data & hw->intr_mask;
1681
1682                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1683                         if (max_ints != AT_MAX_INT_WORK)
1684                                 handled = IRQ_HANDLED;
1685                         break;
1686                 }
1687                 /* link event */
1688                 if (status & ISR_GPHY)
1689                         atl1c_clear_phy_int(adapter);
1690                 /* Ack ISR */
1691                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1692                 if (status & ISR_RX_PKT) {
1693                         if (likely(napi_schedule_prep(&adapter->napi))) {
1694                                 hw->intr_mask &= ~ISR_RX_PKT;
1695                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1696                                 __napi_schedule(&adapter->napi);
1697                         }
1698                 }
1699                 if (status & ISR_TX_PKT)
1700                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1701
1702                 handled = IRQ_HANDLED;
1703                 /* check if PCIE PHY Link down */
1704                 if (status & ISR_ERROR) {
1705                         if (netif_msg_hw(adapter))
1706                                 dev_err(&pdev->dev,
1707                                         "atl1c hardware error (status = 0x%x)\n",
1708                                         status & ISR_ERROR);
1709                         /* reset MAC */
1710                         adapter->work_event |= ATL1C_WORK_EVENT_RESET;
1711                         schedule_work(&adapter->common_task);
1712                         return IRQ_HANDLED;
1713                 }
1714
1715                 if (status & ISR_OVER)
1716                         if (netif_msg_intr(adapter))
1717                                 dev_warn(&pdev->dev,
1718                                         "TX/RX overflow (status = 0x%x)\n",
1719                                         status & ISR_OVER);
1720
1721                 /* link event */
1722                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1723                         netdev->stats.tx_carrier_errors++;
1724                         atl1c_link_chg_event(adapter);
1725                         break;
1726                 }
1727
1728         } while (--max_ints > 0);
1729         /* re-enable Interrupt*/
1730         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1731         return handled;
1732 }
1733
1734 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1735                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1736 {
1737         /*
1738          * The pid field in RRS in not correct sometimes, so we
1739          * cannot figure out if the packet is fragmented or not,
1740          * so we tell the KERNEL CHECKSUM_NONE
1741          */
1742         skb_checksum_none_assert(skb);
1743 }
1744
1745 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1746 {
1747         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1748         struct pci_dev *pdev = adapter->pdev;
1749         struct atl1c_buffer *buffer_info, *next_info;
1750         struct sk_buff *skb;
1751         void *vir_addr = NULL;
1752         u16 num_alloc = 0;
1753         u16 rfd_next_to_use, next_next;
1754         struct atl1c_rx_free_desc *rfd_desc;
1755
1756         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1757         if (++next_next == rfd_ring->count)
1758                 next_next = 0;
1759         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1760         next_info = &rfd_ring->buffer_info[next_next];
1761
1762         while (next_info->flags & ATL1C_BUFFER_FREE) {
1763                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1764
1765                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1766                 if (unlikely(!skb)) {
1767                         if (netif_msg_rx_err(adapter))
1768                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1769                         break;
1770                 }
1771
1772                 /*
1773                  * Make buffer alignment 2 beyond a 16 byte boundary
1774                  * this will result in a 16 byte aligned IP header after
1775                  * the 14 byte MAC header is removed
1776                  */
1777                 vir_addr = skb->data;
1778                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1779                 buffer_info->skb = skb;
1780                 buffer_info->length = adapter->rx_buffer_len;
1781                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1782                                                 buffer_info->length,
1783                                                 PCI_DMA_FROMDEVICE);
1784                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1785                         ATL1C_PCIMAP_FROMDEVICE);
1786                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1787                 rfd_next_to_use = next_next;
1788                 if (++next_next == rfd_ring->count)
1789                         next_next = 0;
1790                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1791                 next_info = &rfd_ring->buffer_info[next_next];
1792                 num_alloc++;
1793         }
1794
1795         if (num_alloc) {
1796                 /* TODO: update mailbox here */
1797                 wmb();
1798                 rfd_ring->next_to_use = rfd_next_to_use;
1799                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1800                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1801         }
1802
1803         return num_alloc;
1804 }
1805
1806 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1807                         struct  atl1c_recv_ret_status *rrs, u16 num)
1808 {
1809         u16 i;
1810         /* the relationship between rrd and rfd is one map one */
1811         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1812                                         rrd_ring->next_to_clean)) {
1813                 rrs->word3 &= ~RRS_RXD_UPDATED;
1814                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1815                         rrd_ring->next_to_clean = 0;
1816         }
1817 }
1818
1819 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1820         struct atl1c_recv_ret_status *rrs, u16 num)
1821 {
1822         u16 i;
1823         u16 rfd_index;
1824         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1825
1826         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1827                         RRS_RX_RFD_INDEX_MASK;
1828         for (i = 0; i < num; i++) {
1829                 buffer_info[rfd_index].skb = NULL;
1830                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1831                                         ATL1C_BUFFER_FREE);
1832                 if (++rfd_index == rfd_ring->count)
1833                         rfd_index = 0;
1834         }
1835         rfd_ring->next_to_clean = rfd_index;
1836 }
1837
1838 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1839                    int *work_done, int work_to_do)
1840 {
1841         u16 rfd_num, rfd_index;
1842         u16 count = 0;
1843         u16 length;
1844         struct pci_dev *pdev = adapter->pdev;
1845         struct net_device *netdev  = adapter->netdev;
1846         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1847         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1848         struct sk_buff *skb;
1849         struct atl1c_recv_ret_status *rrs;
1850         struct atl1c_buffer *buffer_info;
1851
1852         while (1) {
1853                 if (*work_done >= work_to_do)
1854                         break;
1855                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1856                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1857                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1858                                 RRS_RX_RFD_CNT_MASK;
1859                         if (unlikely(rfd_num != 1))
1860                                 /* TODO support mul rfd*/
1861                                 if (netif_msg_rx_err(adapter))
1862                                         dev_warn(&pdev->dev,
1863                                                 "Multi rfd not support yet!\n");
1864                         goto rrs_checked;
1865                 } else {
1866                         break;
1867                 }
1868 rrs_checked:
1869                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1870                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1871                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1872                                 if (netif_msg_rx_err(adapter))
1873                                         dev_warn(&pdev->dev,
1874                                                 "wrong packet! rrs word3 is %x\n",
1875                                                 rrs->word3);
1876                         continue;
1877                 }
1878
1879                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1880                                 RRS_PKT_SIZE_MASK);
1881                 /* Good Receive */
1882                 if (likely(rfd_num == 1)) {
1883                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1884                                         RRS_RX_RFD_INDEX_MASK;
1885                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1886                         pci_unmap_single(pdev, buffer_info->dma,
1887                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1888                         skb = buffer_info->skb;
1889                 } else {
1890                         /* TODO */
1891                         if (netif_msg_rx_err(adapter))
1892                                 dev_warn(&pdev->dev,
1893                                         "Multi rfd not support yet!\n");
1894                         break;
1895                 }
1896                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1897                 skb_put(skb, length - ETH_FCS_LEN);
1898                 skb->protocol = eth_type_trans(skb, netdev);
1899                 atl1c_rx_checksum(adapter, skb, rrs);
1900                 if (rrs->word3 & RRS_VLAN_INS) {
1901                         u16 vlan;
1902
1903                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1904                         vlan = le16_to_cpu(vlan);
1905                         __vlan_hwaccel_put_tag(skb, vlan);
1906                 }
1907                 netif_receive_skb(skb);
1908
1909                 (*work_done)++;
1910                 count++;
1911         }
1912         if (count)
1913                 atl1c_alloc_rx_buffer(adapter, que);
1914 }
1915
1916 /*
1917  * atl1c_clean - NAPI Rx polling callback
1918  * @adapter: board private structure
1919  */
1920 static int atl1c_clean(struct napi_struct *napi, int budget)
1921 {
1922         struct atl1c_adapter *adapter =
1923                         container_of(napi, struct atl1c_adapter, napi);
1924         int work_done = 0;
1925
1926         /* Keep link state information with original netdev */
1927         if (!netif_carrier_ok(adapter->netdev))
1928                 goto quit_polling;
1929         /* just enable one RXQ */
1930         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1931
1932         if (work_done < budget) {
1933 quit_polling:
1934                 napi_complete(napi);
1935                 adapter->hw.intr_mask |= ISR_RX_PKT;
1936                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1937         }
1938         return work_done;
1939 }
1940
1941 #ifdef CONFIG_NET_POLL_CONTROLLER
1942
1943 /*
1944  * Polling 'interrupt' - used by things like netconsole to send skbs
1945  * without having to re-enable interrupts. It's not called while
1946  * the interrupt routine is executing.
1947  */
1948 static void atl1c_netpoll(struct net_device *netdev)
1949 {
1950         struct atl1c_adapter *adapter = netdev_priv(netdev);
1951
1952         disable_irq(adapter->pdev->irq);
1953         atl1c_intr(adapter->pdev->irq, netdev);
1954         enable_irq(adapter->pdev->irq);
1955 }
1956 #endif
1957
1958 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1959 {
1960         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1961         u16 next_to_use = 0;
1962         u16 next_to_clean = 0;
1963
1964         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1965         next_to_use   = tpd_ring->next_to_use;
1966
1967         return (u16)(next_to_clean > next_to_use) ?
1968                 (next_to_clean - next_to_use - 1) :
1969                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1970 }
1971
1972 /*
1973  * get next usable tpd
1974  * Note: should call atl1c_tdp_avail to make sure
1975  * there is enough tpd to use
1976  */
1977 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1978         enum atl1c_trans_queue type)
1979 {
1980         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1981         struct atl1c_tpd_desc *tpd_desc;
1982         u16 next_to_use = 0;
1983
1984         next_to_use = tpd_ring->next_to_use;
1985         if (++tpd_ring->next_to_use == tpd_ring->count)
1986                 tpd_ring->next_to_use = 0;
1987         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1988         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1989         return  tpd_desc;
1990 }
1991
1992 static struct atl1c_buffer *
1993 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1994 {
1995         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1996
1997         return &tpd_ring->buffer_info[tpd -
1998                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1999 }
2000
2001 /* Calculate the transmit packet descript needed*/
2002 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
2003 {
2004         u16 tpd_req;
2005         u16 proto_hdr_len = 0;
2006
2007         tpd_req = skb_shinfo(skb)->nr_frags + 1;
2008
2009         if (skb_is_gso(skb)) {
2010                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2011                 if (proto_hdr_len < skb_headlen(skb))
2012                         tpd_req++;
2013                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
2014                         tpd_req++;
2015         }
2016         return tpd_req;
2017 }
2018
2019 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
2020                           struct sk_buff *skb,
2021                           struct atl1c_tpd_desc **tpd,
2022                           enum atl1c_trans_queue type)
2023 {
2024         struct pci_dev *pdev = adapter->pdev;
2025         u8 hdr_len;
2026         u32 real_len;
2027         unsigned short offload_type;
2028         int err;
2029
2030         if (skb_is_gso(skb)) {
2031                 if (skb_header_cloned(skb)) {
2032                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2033                         if (unlikely(err))
2034                                 return -1;
2035                 }
2036                 offload_type = skb_shinfo(skb)->gso_type;
2037
2038                 if (offload_type & SKB_GSO_TCPV4) {
2039                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2040                                         + ntohs(ip_hdr(skb)->tot_len));
2041
2042                         if (real_len < skb->len)
2043                                 pskb_trim(skb, real_len);
2044
2045                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2046                         if (unlikely(skb->len == hdr_len)) {
2047                                 /* only xsum need */
2048                                 if (netif_msg_tx_queued(adapter))
2049                                         dev_warn(&pdev->dev,
2050                                                 "IPV4 tso with zero data??\n");
2051                                 goto check_sum;
2052                         } else {
2053                                 ip_hdr(skb)->check = 0;
2054                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2055                                                         ip_hdr(skb)->saddr,
2056                                                         ip_hdr(skb)->daddr,
2057                                                         0, IPPROTO_TCP, 0);
2058                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2059                         }
2060                 }
2061
2062                 if (offload_type & SKB_GSO_TCPV6) {
2063                         struct atl1c_tpd_ext_desc *etpd =
2064                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2065
2066                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2067                         *tpd = atl1c_get_tpd(adapter, type);
2068                         ipv6_hdr(skb)->payload_len = 0;
2069                         /* check payload == 0 byte ? */
2070                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2071                         if (unlikely(skb->len == hdr_len)) {
2072                                 /* only xsum need */
2073                                 if (netif_msg_tx_queued(adapter))
2074                                         dev_warn(&pdev->dev,
2075                                                 "IPV6 tso with zero data??\n");
2076                                 goto check_sum;
2077                         } else
2078                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2079                                                 &ipv6_hdr(skb)->saddr,
2080                                                 &ipv6_hdr(skb)->daddr,
2081                                                 0, IPPROTO_TCP, 0);
2082                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2083                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2084                         etpd->pkt_len = cpu_to_le32(skb->len);
2085                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2086                 }
2087
2088                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2089                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2090                                 TPD_TCPHDR_OFFSET_SHIFT;
2091                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2092                                 TPD_MSS_SHIFT;
2093                 return 0;
2094         }
2095
2096 check_sum:
2097         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2098                 u8 css, cso;
2099                 cso = skb_checksum_start_offset(skb);
2100
2101                 if (unlikely(cso & 0x1)) {
2102                         if (netif_msg_tx_err(adapter))
2103                                 dev_err(&adapter->pdev->dev,
2104                                         "payload offset should not an event number\n");
2105                         return -1;
2106                 } else {
2107                         css = cso + skb->csum_offset;
2108
2109                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2110                                         TPD_PLOADOFFSET_SHIFT;
2111                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2112                                         TPD_CCSUM_OFFSET_SHIFT;
2113                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2114                 }
2115         }
2116         return 0;
2117 }
2118
2119 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2120                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2121                         enum atl1c_trans_queue type)
2122 {
2123         struct atl1c_tpd_desc *use_tpd = NULL;
2124         struct atl1c_buffer *buffer_info = NULL;
2125         u16 buf_len = skb_headlen(skb);
2126         u16 map_len = 0;
2127         u16 mapped_len = 0;
2128         u16 hdr_len = 0;
2129         u16 nr_frags;
2130         u16 f;
2131         int tso;
2132
2133         nr_frags = skb_shinfo(skb)->nr_frags;
2134         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2135         if (tso) {
2136                 /* TSO */
2137                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2138                 use_tpd = tpd;
2139
2140                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2141                 buffer_info->length = map_len;
2142                 buffer_info->dma = pci_map_single(adapter->pdev,
2143                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2144                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2145                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2146                         ATL1C_PCIMAP_TODEVICE);
2147                 mapped_len += map_len;
2148                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2149                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2150         }
2151
2152         if (mapped_len < buf_len) {
2153                 /* mapped_len == 0, means we should use the first tpd,
2154                    which is given by caller  */
2155                 if (mapped_len == 0)
2156                         use_tpd = tpd;
2157                 else {
2158                         use_tpd = atl1c_get_tpd(adapter, type);
2159                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2160                 }
2161                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2162                 buffer_info->length = buf_len - mapped_len;
2163                 buffer_info->dma =
2164                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2165                                         buffer_info->length, PCI_DMA_TODEVICE);
2166                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2167                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2168                         ATL1C_PCIMAP_TODEVICE);
2169                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2170                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2171         }
2172
2173         for (f = 0; f < nr_frags; f++) {
2174                 struct skb_frag_struct *frag;
2175
2176                 frag = &skb_shinfo(skb)->frags[f];
2177
2178                 use_tpd = atl1c_get_tpd(adapter, type);
2179                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2180
2181                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2182                 buffer_info->length = frag->size;
2183                 buffer_info->dma =
2184                         pci_map_page(adapter->pdev, frag->page,
2185                                         frag->page_offset,
2186                                         buffer_info->length,
2187                                         PCI_DMA_TODEVICE);
2188                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2189                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2190                         ATL1C_PCIMAP_TODEVICE);
2191                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2192                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2193         }
2194
2195         /* The last tpd */
2196         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2197         /* The last buffer info contain the skb address,
2198            so it will be free after unmap */
2199         buffer_info->skb = skb;
2200 }
2201
2202 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2203                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2204 {
2205         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2206         u32 prod_data;
2207
2208         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2209         switch (type) {
2210         case atl1c_trans_high:
2211                 prod_data &= 0xFFFF0000;
2212                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2213                 break;
2214         case atl1c_trans_normal:
2215                 prod_data &= 0x0000FFFF;
2216                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2217                 break;
2218         default:
2219                 break;
2220         }
2221         wmb();
2222         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2223 }
2224
2225 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2226                                           struct net_device *netdev)
2227 {
2228         struct atl1c_adapter *adapter = netdev_priv(netdev);
2229         unsigned long flags;
2230         u16 tpd_req = 1;
2231         struct atl1c_tpd_desc *tpd;
2232         enum atl1c_trans_queue type = atl1c_trans_normal;
2233
2234         if (test_bit(__AT_DOWN, &adapter->flags)) {
2235                 dev_kfree_skb_any(skb);
2236                 return NETDEV_TX_OK;
2237         }
2238
2239         tpd_req = atl1c_cal_tpd_req(skb);
2240         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2241                 if (netif_msg_pktdata(adapter))
2242                         dev_info(&adapter->pdev->dev, "tx locked\n");
2243                 return NETDEV_TX_LOCKED;
2244         }
2245         if (skb->mark == 0x01)
2246                 type = atl1c_trans_high;
2247         else
2248                 type = atl1c_trans_normal;
2249
2250         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2251                 /* no enough descriptor, just stop queue */
2252                 netif_stop_queue(netdev);
2253                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2254                 return NETDEV_TX_BUSY;
2255         }
2256
2257         tpd = atl1c_get_tpd(adapter, type);
2258
2259         /* do TSO and check sum */
2260         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2261                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2262                 dev_kfree_skb_any(skb);
2263                 return NETDEV_TX_OK;
2264         }
2265
2266         if (unlikely(vlan_tx_tag_present(skb))) {
2267                 u16 vlan = vlan_tx_tag_get(skb);
2268                 __le16 tag;
2269
2270                 vlan = cpu_to_le16(vlan);
2271                 AT_VLAN_TO_TAG(vlan, tag);
2272                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2273                 tpd->vlan_tag = tag;
2274         }
2275
2276         if (skb_network_offset(skb) != ETH_HLEN)
2277                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2278
2279         atl1c_tx_map(adapter, skb, tpd, type);
2280         atl1c_tx_queue(adapter, skb, tpd, type);
2281
2282         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2283         return NETDEV_TX_OK;
2284 }
2285
2286 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2287 {
2288         struct net_device *netdev = adapter->netdev;
2289
2290         free_irq(adapter->pdev->irq, netdev);
2291
2292         if (adapter->have_msi)
2293                 pci_disable_msi(adapter->pdev);
2294 }
2295
2296 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2297 {
2298         struct pci_dev    *pdev   = adapter->pdev;
2299         struct net_device *netdev = adapter->netdev;
2300         int flags = 0;
2301         int err = 0;
2302
2303         adapter->have_msi = true;
2304         err = pci_enable_msi(adapter->pdev);
2305         if (err) {
2306                 if (netif_msg_ifup(adapter))
2307                         dev_err(&pdev->dev,
2308                                 "Unable to allocate MSI interrupt Error: %d\n",
2309                                 err);
2310                 adapter->have_msi = false;
2311         } else
2312                 netdev->irq = pdev->irq;
2313
2314         if (!adapter->have_msi)
2315                 flags |= IRQF_SHARED;
2316         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2317                         netdev->name, netdev);
2318         if (err) {
2319                 if (netif_msg_ifup(adapter))
2320                         dev_err(&pdev->dev,
2321                                 "Unable to allocate interrupt Error: %d\n",
2322                                 err);
2323                 if (adapter->have_msi)
2324                         pci_disable_msi(adapter->pdev);
2325                 return err;
2326         }
2327         if (netif_msg_ifup(adapter))
2328                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2329         return err;
2330 }
2331
2332 static int atl1c_up(struct atl1c_adapter *adapter)
2333 {
2334         struct net_device *netdev = adapter->netdev;
2335         int num;
2336         int err;
2337         int i;
2338
2339         netif_carrier_off(netdev);
2340         atl1c_init_ring_ptrs(adapter);
2341         atl1c_set_multi(netdev);
2342         atl1c_restore_vlan(adapter);
2343
2344         for (i = 0; i < adapter->num_rx_queues; i++) {
2345                 num = atl1c_alloc_rx_buffer(adapter, i);
2346                 if (unlikely(num == 0)) {
2347                         err = -ENOMEM;
2348                         goto err_alloc_rx;
2349                 }
2350         }
2351
2352         if (atl1c_configure(adapter)) {
2353                 err = -EIO;
2354                 goto err_up;
2355         }
2356
2357         err = atl1c_request_irq(adapter);
2358         if (unlikely(err))
2359                 goto err_up;
2360
2361         clear_bit(__AT_DOWN, &adapter->flags);
2362         napi_enable(&adapter->napi);
2363         atl1c_irq_enable(adapter);
2364         atl1c_check_link_status(adapter);
2365         netif_start_queue(netdev);
2366         return err;
2367
2368 err_up:
2369 err_alloc_rx:
2370         atl1c_clean_rx_ring(adapter);
2371         return err;
2372 }
2373
2374 static void atl1c_down(struct atl1c_adapter *adapter)
2375 {
2376         struct net_device *netdev = adapter->netdev;
2377
2378         atl1c_del_timer(adapter);
2379         adapter->work_event = 0; /* clear all event */
2380         /* signal that we're down so the interrupt handler does not
2381          * reschedule our watchdog timer */
2382         set_bit(__AT_DOWN, &adapter->flags);
2383         netif_carrier_off(netdev);
2384         napi_disable(&adapter->napi);
2385         atl1c_irq_disable(adapter);
2386         atl1c_free_irq(adapter);
2387         /* reset MAC to disable all RX/TX */
2388         atl1c_reset_mac(&adapter->hw);
2389         msleep(1);
2390
2391         adapter->link_speed = SPEED_0;
2392         adapter->link_duplex = -1;
2393         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2394         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2395         atl1c_clean_rx_ring(adapter);
2396 }
2397
2398 /*
2399  * atl1c_open - Called when a network interface is made active
2400  * @netdev: network interface device structure
2401  *
2402  * Returns 0 on success, negative value on failure
2403  *
2404  * The open entry point is called when a network interface is made
2405  * active by the system (IFF_UP).  At this point all resources needed
2406  * for transmit and receive operations are allocated, the interrupt
2407  * handler is registered with the OS, the watchdog timer is started,
2408  * and the stack is notified that the interface is ready.
2409  */
2410 static int atl1c_open(struct net_device *netdev)
2411 {
2412         struct atl1c_adapter *adapter = netdev_priv(netdev);
2413         int err;
2414
2415         /* disallow open during test */
2416         if (test_bit(__AT_TESTING, &adapter->flags))
2417                 return -EBUSY;
2418
2419         /* allocate rx/tx dma buffer & descriptors */
2420         err = atl1c_setup_ring_resources(adapter);
2421         if (unlikely(err))
2422                 return err;
2423
2424         err = atl1c_up(adapter);
2425         if (unlikely(err))
2426                 goto err_up;
2427
2428         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2429                 u32 phy_data;
2430
2431                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2432                 phy_data |= MDIO_AP_EN;
2433                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2434         }
2435         return 0;
2436
2437 err_up:
2438         atl1c_free_irq(adapter);
2439         atl1c_free_ring_resources(adapter);
2440         atl1c_reset_mac(&adapter->hw);
2441         return err;
2442 }
2443
2444 /*
2445  * atl1c_close - Disables a network interface
2446  * @netdev: network interface device structure
2447  *
2448  * Returns 0, this is not allowed to fail
2449  *
2450  * The close entry point is called when an interface is de-activated
2451  * by the OS.  The hardware is still under the drivers control, but
2452  * needs to be disabled.  A global MAC reset is issued to stop the
2453  * hardware, and all transmit and receive resources are freed.
2454  */
2455 static int atl1c_close(struct net_device *netdev)
2456 {
2457         struct atl1c_adapter *adapter = netdev_priv(netdev);
2458
2459         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2460         atl1c_down(adapter);
2461         atl1c_free_ring_resources(adapter);
2462         return 0;
2463 }
2464
2465 static int atl1c_suspend(struct device *dev)
2466 {
2467         struct pci_dev *pdev = to_pci_dev(dev);
2468         struct net_device *netdev = pci_get_drvdata(pdev);
2469         struct atl1c_adapter *adapter = netdev_priv(netdev);
2470         struct atl1c_hw *hw = &adapter->hw;
2471         u32 mac_ctrl_data = 0;
2472         u32 master_ctrl_data = 0;
2473         u32 wol_ctrl_data = 0;
2474         u16 mii_intr_status_data = 0;
2475         u32 wufc = adapter->wol;
2476
2477         atl1c_disable_l0s_l1(hw);
2478         if (netif_running(netdev)) {
2479                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2480                 atl1c_down(adapter);
2481         }
2482         netif_device_detach(netdev);
2483
2484         if (wufc)
2485                 if (atl1c_phy_power_saving(hw) != 0)
2486                         dev_dbg(&pdev->dev, "phy power saving failed");
2487
2488         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2489         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
2490
2491         master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2492         mac_ctrl_data &= ~(MAC_CTRL_PRMLEN_MASK << MAC_CTRL_PRMLEN_SHIFT);
2493         mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2494                         MAC_CTRL_PRMLEN_MASK) <<
2495                         MAC_CTRL_PRMLEN_SHIFT);
2496         mac_ctrl_data &= ~(MAC_CTRL_SPEED_MASK << MAC_CTRL_SPEED_SHIFT);
2497         mac_ctrl_data &= ~MAC_CTRL_DUPLX;
2498
2499         if (wufc) {
2500                 mac_ctrl_data |= MAC_CTRL_RX_EN;
2501                 if (adapter->link_speed == SPEED_1000 ||
2502                         adapter->link_speed == SPEED_0) {
2503                         mac_ctrl_data |= atl1c_mac_speed_1000 <<
2504                                         MAC_CTRL_SPEED_SHIFT;
2505                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2506                 } else
2507                         mac_ctrl_data |= atl1c_mac_speed_10_100 <<
2508                                         MAC_CTRL_SPEED_SHIFT;
2509
2510                 if (adapter->link_duplex == DUPLEX_FULL)
2511                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2512
2513                 /* turn on magic packet wol */
2514                 if (wufc & AT_WUFC_MAG)
2515                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2516
2517                 if (wufc & AT_WUFC_LNKC) {
2518                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2519                         /* only link up can wake up */
2520                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2521                                 dev_dbg(&pdev->dev, "%s: read write phy "
2522                                                   "register failed.\n",
2523                                                   atl1c_driver_name);
2524                         }
2525                 }
2526                 /* clear phy interrupt */
2527                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2528                 /* Config MAC Ctrl register */
2529                 __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
2530
2531                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2532                 if (wufc & AT_WUFC_MAG)
2533                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2534
2535                 dev_dbg(&pdev->dev,
2536                         "%s: suspend MAC=0x%x\n",
2537                         atl1c_driver_name, mac_ctrl_data);
2538                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2539                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2540                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2541
2542                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
2543                         GPHY_CTRL_EXT_RESET);
2544         } else {
2545                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_POWER_SAVING);
2546                 master_ctrl_data |= MASTER_CTRL_CLK_SEL_DIS;
2547                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2548                 mac_ctrl_data |= MAC_CTRL_DUPLX;
2549                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2550                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2551                 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2552                 hw->phy_configured = false; /* re-init PHY when resume */
2553         }
2554
2555         return 0;
2556 }
2557
2558 #ifdef CONFIG_PM_SLEEP
2559 static int atl1c_resume(struct device *dev)
2560 {
2561         struct pci_dev *pdev = to_pci_dev(dev);
2562         struct net_device *netdev = pci_get_drvdata(pdev);
2563         struct atl1c_adapter *adapter = netdev_priv(netdev);
2564
2565         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2566         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2567                         ATL1C_PCIE_PHY_RESET);
2568
2569         atl1c_phy_reset(&adapter->hw);
2570         atl1c_reset_mac(&adapter->hw);
2571         atl1c_phy_init(&adapter->hw);
2572
2573 #if 0
2574         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2575         pm_data &= ~PM_CTRLSTAT_PME_EN;
2576         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2577 #endif
2578
2579         netif_device_attach(netdev);
2580         if (netif_running(netdev))
2581                 atl1c_up(adapter);
2582
2583         return 0;
2584 }
2585 #endif
2586
2587 static void atl1c_shutdown(struct pci_dev *pdev)
2588 {
2589         struct net_device *netdev = pci_get_drvdata(pdev);
2590         struct atl1c_adapter *adapter = netdev_priv(netdev);
2591
2592         atl1c_suspend(&pdev->dev);
2593         pci_wake_from_d3(pdev, adapter->wol);
2594         pci_set_power_state(pdev, PCI_D3hot);
2595 }
2596
2597 static const struct net_device_ops atl1c_netdev_ops = {
2598         .ndo_open               = atl1c_open,
2599         .ndo_stop               = atl1c_close,
2600         .ndo_validate_addr      = eth_validate_addr,
2601         .ndo_start_xmit         = atl1c_xmit_frame,
2602         .ndo_set_mac_address    = atl1c_set_mac_addr,
2603         .ndo_set_multicast_list = atl1c_set_multi,
2604         .ndo_change_mtu         = atl1c_change_mtu,
2605         .ndo_fix_features       = atl1c_fix_features,
2606         .ndo_set_features       = atl1c_set_features,
2607         .ndo_do_ioctl           = atl1c_ioctl,
2608         .ndo_tx_timeout         = atl1c_tx_timeout,
2609         .ndo_get_stats          = atl1c_get_stats,
2610 #ifdef CONFIG_NET_POLL_CONTROLLER
2611         .ndo_poll_controller    = atl1c_netpoll,
2612 #endif
2613 };
2614
2615 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2616 {
2617         SET_NETDEV_DEV(netdev, &pdev->dev);
2618         pci_set_drvdata(pdev, netdev);
2619
2620         netdev->irq  = pdev->irq;
2621         netdev->netdev_ops = &atl1c_netdev_ops;
2622         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2623         atl1c_set_ethtool_ops(netdev);
2624
2625         /* TODO: add when ready */
2626         netdev->hw_features =   NETIF_F_SG         |
2627                                 NETIF_F_HW_CSUM    |
2628                                 NETIF_F_HW_VLAN_RX |
2629                                 NETIF_F_TSO        |
2630                                 NETIF_F_TSO6;
2631         netdev->features =      netdev->hw_features |
2632                                 NETIF_F_HW_VLAN_TX;
2633         return 0;
2634 }
2635
2636 /*
2637  * atl1c_probe - Device Initialization Routine
2638  * @pdev: PCI device information struct
2639  * @ent: entry in atl1c_pci_tbl
2640  *
2641  * Returns 0 on success, negative on failure
2642  *
2643  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2644  * The OS initialization, configuring of the adapter private structure,
2645  * and a hardware reset occur.
2646  */
2647 static int __devinit atl1c_probe(struct pci_dev *pdev,
2648                                  const struct pci_device_id *ent)
2649 {
2650         struct net_device *netdev;
2651         struct atl1c_adapter *adapter;
2652         static int cards_found;
2653
2654         int err = 0;
2655
2656         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2657         err = pci_enable_device_mem(pdev);
2658         if (err) {
2659                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2660                 return err;
2661         }
2662
2663         /*
2664          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2665          * shared register for the high 32 bits, so only a single, aligned,
2666          * 4 GB physical address range can be used at a time.
2667          *
2668          * Supporting 64-bit DMA on this hardware is more trouble than it's
2669          * worth.  It is far easier to limit to 32-bit DMA than update
2670          * various kernel subsystems to support the mechanics required by a
2671          * fixed-high-32-bit system.
2672          */
2673         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2674             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2675                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2676                 goto err_dma;
2677         }
2678
2679         err = pci_request_regions(pdev, atl1c_driver_name);
2680         if (err) {
2681                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2682                 goto err_pci_reg;
2683         }
2684
2685         pci_set_master(pdev);
2686
2687         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2688         if (netdev == NULL) {
2689                 err = -ENOMEM;
2690                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2691                 goto err_alloc_etherdev;
2692         }
2693
2694         err = atl1c_init_netdev(netdev, pdev);
2695         if (err) {
2696                 dev_err(&pdev->dev, "init netdevice failed\n");
2697                 goto err_init_netdev;
2698         }
2699         adapter = netdev_priv(netdev);
2700         adapter->bd_number = cards_found;
2701         adapter->netdev = netdev;
2702         adapter->pdev = pdev;
2703         adapter->hw.adapter = adapter;
2704         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2705         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2706         if (!adapter->hw.hw_addr) {
2707                 err = -EIO;
2708                 dev_err(&pdev->dev, "cannot map device registers\n");
2709                 goto err_ioremap;
2710         }
2711         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2712
2713         /* init mii data */
2714         adapter->mii.dev = netdev;
2715         adapter->mii.mdio_read  = atl1c_mdio_read;
2716         adapter->mii.mdio_write = atl1c_mdio_write;
2717         adapter->mii.phy_id_mask = 0x1f;
2718         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2719         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2720         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2721                         (unsigned long)adapter);
2722         /* setup the private structure */
2723         err = atl1c_sw_init(adapter);
2724         if (err) {
2725                 dev_err(&pdev->dev, "net device private data init failed\n");
2726                 goto err_sw_init;
2727         }
2728         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2729                         ATL1C_PCIE_PHY_RESET);
2730
2731         /* Init GPHY as early as possible due to power saving issue  */
2732         atl1c_phy_reset(&adapter->hw);
2733
2734         err = atl1c_reset_mac(&adapter->hw);
2735         if (err) {
2736                 err = -EIO;
2737                 goto err_reset;
2738         }
2739
2740         /* reset the controller to
2741          * put the device in a known good starting state */
2742         err = atl1c_phy_init(&adapter->hw);
2743         if (err) {
2744                 err = -EIO;
2745                 goto err_reset;
2746         }
2747         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2748                 err = -EIO;
2749                 dev_err(&pdev->dev, "get mac address failed\n");
2750                 goto err_eeprom;
2751         }
2752         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2753         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2754         if (netif_msg_probe(adapter))
2755                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2756                         adapter->hw.mac_addr);
2757
2758         atl1c_hw_set_mac_addr(&adapter->hw);
2759         INIT_WORK(&adapter->common_task, atl1c_common_task);
2760         adapter->work_event = 0;
2761         err = register_netdev(netdev);
2762         if (err) {
2763                 dev_err(&pdev->dev, "register netdevice failed\n");
2764                 goto err_register;
2765         }
2766
2767         if (netif_msg_probe(adapter))
2768                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2769         cards_found++;
2770         return 0;
2771
2772 err_reset:
2773 err_register:
2774 err_sw_init:
2775 err_eeprom:
2776         iounmap(adapter->hw.hw_addr);
2777 err_init_netdev:
2778 err_ioremap:
2779         free_netdev(netdev);
2780 err_alloc_etherdev:
2781         pci_release_regions(pdev);
2782 err_pci_reg:
2783 err_dma:
2784         pci_disable_device(pdev);
2785         return err;
2786 }
2787
2788 /*
2789  * atl1c_remove - Device Removal Routine
2790  * @pdev: PCI device information struct
2791  *
2792  * atl1c_remove is called by the PCI subsystem to alert the driver
2793  * that it should release a PCI device.  The could be caused by a
2794  * Hot-Plug event, or because the driver is going to be removed from
2795  * memory.
2796  */
2797 static void __devexit atl1c_remove(struct pci_dev *pdev)
2798 {
2799         struct net_device *netdev = pci_get_drvdata(pdev);
2800         struct atl1c_adapter *adapter = netdev_priv(netdev);
2801
2802         unregister_netdev(netdev);
2803         atl1c_phy_disable(&adapter->hw);
2804
2805         iounmap(adapter->hw.hw_addr);
2806
2807         pci_release_regions(pdev);
2808         pci_disable_device(pdev);
2809         free_netdev(netdev);
2810 }
2811
2812 /*
2813  * atl1c_io_error_detected - called when PCI error is detected
2814  * @pdev: Pointer to PCI device
2815  * @state: The current pci connection state
2816  *
2817  * This function is called after a PCI bus error affecting
2818  * this device has been detected.
2819  */
2820 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2821                                                 pci_channel_state_t state)
2822 {
2823         struct net_device *netdev = pci_get_drvdata(pdev);
2824         struct atl1c_adapter *adapter = netdev_priv(netdev);
2825
2826         netif_device_detach(netdev);
2827
2828         if (state == pci_channel_io_perm_failure)
2829                 return PCI_ERS_RESULT_DISCONNECT;
2830
2831         if (netif_running(netdev))
2832                 atl1c_down(adapter);
2833
2834         pci_disable_device(pdev);
2835
2836         /* Request a slot slot reset. */
2837         return PCI_ERS_RESULT_NEED_RESET;
2838 }
2839
2840 /*
2841  * atl1c_io_slot_reset - called after the pci bus has been reset.
2842  * @pdev: Pointer to PCI device
2843  *
2844  * Restart the card from scratch, as if from a cold-boot. Implementation
2845  * resembles the first-half of the e1000_resume routine.
2846  */
2847 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2848 {
2849         struct net_device *netdev = pci_get_drvdata(pdev);
2850         struct atl1c_adapter *adapter = netdev_priv(netdev);
2851
2852         if (pci_enable_device(pdev)) {
2853                 if (netif_msg_hw(adapter))
2854                         dev_err(&pdev->dev,
2855                                 "Cannot re-enable PCI device after reset\n");
2856                 return PCI_ERS_RESULT_DISCONNECT;
2857         }
2858         pci_set_master(pdev);
2859
2860         pci_enable_wake(pdev, PCI_D3hot, 0);
2861         pci_enable_wake(pdev, PCI_D3cold, 0);
2862
2863         atl1c_reset_mac(&adapter->hw);
2864
2865         return PCI_ERS_RESULT_RECOVERED;
2866 }
2867
2868 /*
2869  * atl1c_io_resume - called when traffic can start flowing again.
2870  * @pdev: Pointer to PCI device
2871  *
2872  * This callback is called when the error recovery driver tells us that
2873  * its OK to resume normal operation. Implementation resembles the
2874  * second-half of the atl1c_resume routine.
2875  */
2876 static void atl1c_io_resume(struct pci_dev *pdev)
2877 {
2878         struct net_device *netdev = pci_get_drvdata(pdev);
2879         struct atl1c_adapter *adapter = netdev_priv(netdev);
2880
2881         if (netif_running(netdev)) {
2882                 if (atl1c_up(adapter)) {
2883                         if (netif_msg_hw(adapter))
2884                                 dev_err(&pdev->dev,
2885                                         "Cannot bring device back up after reset\n");
2886                         return;
2887                 }
2888         }
2889
2890         netif_device_attach(netdev);
2891 }
2892
2893 static struct pci_error_handlers atl1c_err_handler = {
2894         .error_detected = atl1c_io_error_detected,
2895         .slot_reset = atl1c_io_slot_reset,
2896         .resume = atl1c_io_resume,
2897 };
2898
2899 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2900
2901 static struct pci_driver atl1c_driver = {
2902         .name     = atl1c_driver_name,
2903         .id_table = atl1c_pci_tbl,
2904         .probe    = atl1c_probe,
2905         .remove   = __devexit_p(atl1c_remove),
2906         .shutdown = atl1c_shutdown,
2907         .err_handler = &atl1c_err_handler,
2908         .driver.pm = &atl1c_pm_ops,
2909 };
2910
2911 /*
2912  * atl1c_init_module - Driver Registration Routine
2913  *
2914  * atl1c_init_module is the first routine called when the driver is
2915  * loaded. All it does is register with the PCI subsystem.
2916  */
2917 static int __init atl1c_init_module(void)
2918 {
2919         return pci_register_driver(&atl1c_driver);
2920 }
2921
2922 /*
2923  * atl1c_exit_module - Driver Exit Cleanup Routine
2924  *
2925  * atl1c_exit_module is called just before the driver is removed
2926  * from memory.
2927  */
2928 static void __exit atl1c_exit_module(void)
2929 {
2930         pci_unregister_driver(&atl1c_driver);
2931 }
2932
2933 module_init(atl1c_init_module);
2934 module_exit(atl1c_exit_module);