drivers/net/atl1c/atl1c_main.c

   1 /*
   2  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1c.h"
  23
  24 #define ATL1C_DRV_VERSION "1.0.1.0-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27 #define PCI_DEVICE_ID_ATTANSIC_L2C      0x1062
  28 #define PCI_DEVICE_ID_ATTANSIC_L1C      0x1063
  29 #define PCI_DEVICE_ID_ATHEROS_L2C_B     0x2060 /* AR8152 v1.1 Fast 10/100 */
  30 #define PCI_DEVICE_ID_ATHEROS_L2C_B2    0x2062 /* AR8152 v2.0 Fast 10/100 */
  31 #define PCI_DEVICE_ID_ATHEROS_L1D       0x1073 /* AR8151 v1.0 Gigabit 1000 */
  32 #define PCI_DEVICE_ID_ATHEROS_L1D_2_0   0x1083 /* AR8151 v2.0 Gigabit 1000 */
  33 #define L2CB_V10                        0xc0
  34 #define L2CB_V11                        0xc1
  35
  36 /*
  37  * atl1c_pci_tbl - PCI Device ID Table
  38  *
  39  * Wildcard entries (PCI_ANY_ID) should come last
  40  * Last entry must be all 0s
  41  *
  42  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  43  *   Class, Class Mask, private data (not used) }
  44  */
  45 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = {
  46         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  47         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  48         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  49         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  50         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  51         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  52         /* required last entry */
  53         { 0 }
  54 };
  55 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  56
  57 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
  58 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  59 MODULE_LICENSE("GPL");
  60 MODULE_VERSION(ATL1C_DRV_VERSION);
  61
  62 static int atl1c_stop_mac(struct atl1c_hw *hw);
  63 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
  64 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
  65 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  66 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
  67 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
  68 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
  69                    int *work_done, int work_to_do);
  70 static int atl1c_up(struct atl1c_adapter *adapter);
  71 static void atl1c_down(struct atl1c_adapter *adapter);
  72
  73 static const u16 atl1c_pay_load_size[] = {
  74         128, 256, 512, 1024, 2048, 4096,
  75 };
  76
  77 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
  78 {
  79         REG_MB_RFD0_PROD_IDX,
  80         REG_MB_RFD1_PROD_IDX,
  81         REG_MB_RFD2_PROD_IDX,
  82         REG_MB_RFD3_PROD_IDX
  83 };
  84
  85 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  86 {
  87         REG_RFD0_HEAD_ADDR_LO,
  88         REG_RFD1_HEAD_ADDR_LO,
  89         REG_RFD2_HEAD_ADDR_LO,
  90         REG_RFD3_HEAD_ADDR_LO
  91 };
  92
  93 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  94 {
  95         REG_RRD0_HEAD_ADDR_LO,
  96         REG_RRD1_HEAD_ADDR_LO,
  97         REG_RRD2_HEAD_ADDR_LO,
  98         REG_RRD3_HEAD_ADDR_LO
  99 };
 100
 101 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
 102         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
 103 static void atl1c_pcie_patch(struct atl1c_hw *hw)
 104 {
 105         u32 data;
 106
 107         AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
 108         data |= PCIE_PHYMISC_FORCE_RCV_DET;
 109         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
 110
 111         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
 112                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
 113
 114                 data &= ~(PCIE_PHYMISC2_SERDES_CDR_MASK <<
 115                         PCIE_PHYMISC2_SERDES_CDR_SHIFT);
 116                 data |= 3 << PCIE_PHYMISC2_SERDES_CDR_SHIFT;
 117                 data &= ~(PCIE_PHYMISC2_SERDES_TH_MASK <<
 118                         PCIE_PHYMISC2_SERDES_TH_SHIFT);
 119                 data |= 3 << PCIE_PHYMISC2_SERDES_TH_SHIFT;
 120                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
 121         }
 122 }
 123
 124 /* FIXME: no need any more ? */
 125 /*
 126  * atl1c_init_pcie - init PCIE module
 127  */
 128 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 129 {
 130         u32 data;
 131         u32 pci_cmd;
 132         struct pci_dev *pdev = hw->adapter->pdev;
 133
 134         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 135         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 136         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 137                 PCI_COMMAND_IO);
 138         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 139
 140         /*
 141          * Clear any PowerSaveing Settings
 142          */
 143         pci_enable_wake(pdev, PCI_D3hot, 0);
 144         pci_enable_wake(pdev, PCI_D3cold, 0);
 145
 146         /*
 147          * Mask some pcie error bits
 148          */
 149         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
 150         data &= ~PCIE_UC_SERVRITY_DLP;
 151         data &= ~PCIE_UC_SERVRITY_FCP;
 152         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
 153
 154         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 155         data &= ~LTSSM_ID_EN_WRO;
 156         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 157
 158         atl1c_pcie_patch(hw);
 159         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 160                 atl1c_disable_l0s_l1(hw);
 161         if (flag & ATL1C_PCIE_PHY_RESET)
 162                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 163         else
 164                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 165                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 166
 167         msleep(5);
 168 }
 169
 170 /*
 171  * atl1c_irq_enable - Enable default interrupt generation settings
 172  * @adapter: board private structure
 173  */
 174 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 175 {
 176         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 177                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 178                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 179                 AT_WRITE_FLUSH(&adapter->hw);
 180         }
 181 }
 182
 183 /*
 184  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 185  * @adapter: board private structure
 186  */
 187 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 188 {
 189         atomic_inc(&adapter->irq_sem);
 190         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 191         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 192         AT_WRITE_FLUSH(&adapter->hw);
 193         synchronize_irq(adapter->pdev->irq);
 194 }
 195
 196 /*
 197  * atl1c_irq_reset - reset interrupt confiure on the NIC
 198  * @adapter: board private structure
 199  */
 200 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 201 {
 202         atomic_set(&adapter->irq_sem, 1);
 203         atl1c_irq_enable(adapter);
 204 }
 205
 206 /*
 207  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 208  * of the idle status register until the device is actually idle
 209  */
 210 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
 211 {
 212         int timeout;
 213         u32 data;
 214
 215         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 216                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 217                 if ((data & IDLE_STATUS_MASK) == 0)
 218                         return 0;
 219                 msleep(1);
 220         }
 221         return data;
 222 }
 223
 224 /*
 225  * atl1c_phy_config - Timer Call-back
 226  * @data: pointer to netdev cast into an unsigned long
 227  */
 228 static void atl1c_phy_config(unsigned long data)
 229 {
 230         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 231         struct atl1c_hw *hw = &adapter->hw;
 232         unsigned long flags;
 233
 234         spin_lock_irqsave(&adapter->mdio_lock, flags);
 235         atl1c_restart_autoneg(hw);
 236         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 237 }
 238
 239 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 240 {
 241         WARN_ON(in_interrupt());
 242         atl1c_down(adapter);
 243         atl1c_up(adapter);
 244         clear_bit(__AT_RESETTING, &adapter->flags);
 245 }
 246
 247 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 248 {
 249         struct atl1c_hw *hw = &adapter->hw;
 250         struct net_device *netdev = adapter->netdev;
 251         struct pci_dev    *pdev   = adapter->pdev;
 252         int err;
 253         unsigned long flags;
 254         u16 speed, duplex, phy_data;
 255
 256         spin_lock_irqsave(&adapter->mdio_lock, flags);
 257         /* MII_BMSR must read twise */
 258         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 259         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 260         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 261
 262         if ((phy_data & BMSR_LSTATUS) == 0) {
 263                 /* link down */
 264                 hw->hibernate = true;
 265                 if (atl1c_stop_mac(hw) != 0)
 266                         if (netif_msg_hw(adapter))
 267                                 dev_warn(&pdev->dev, "stop mac failed\n");
 268                 atl1c_set_aspm(hw, false);
 269                 netif_carrier_off(netdev);
 270                 netif_stop_queue(netdev);
 271                 atl1c_phy_reset(hw);
 272                 atl1c_phy_init(&adapter->hw);
 273         } else {
 274                 /* Link Up */
 275                 hw->hibernate = false;
 276                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 277                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 278                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 279                 if (unlikely(err))
 280                         return;
 281                 /* link result is our setting */
 282                 if (adapter->link_speed != speed ||
 283                     adapter->link_duplex != duplex) {
 284                         adapter->link_speed  = speed;
 285                         adapter->link_duplex = duplex;
 286                         atl1c_set_aspm(hw, true);
 287                         atl1c_enable_tx_ctrl(hw);
 288                         atl1c_enable_rx_ctrl(hw);
 289                         atl1c_setup_mac_ctrl(adapter);
 290                         if (netif_msg_link(adapter))
 291                                 dev_info(&pdev->dev,
 292                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 293                                         atl1c_driver_name, netdev->name,
 294                                         adapter->link_speed,
 295                                         adapter->link_duplex == FULL_DUPLEX ?
 296                                         "Full Duplex" : "Half Duplex");
 297                 }
 298                 if (!netif_carrier_ok(netdev))
 299                         netif_carrier_on(netdev);
 300         }
 301 }
 302
 303 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 304 {
 305         struct net_device *netdev = adapter->netdev;
 306         struct pci_dev    *pdev   = adapter->pdev;
 307         u16 phy_data;
 308         u16 link_up;
 309
 310         spin_lock(&adapter->mdio_lock);
 311         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 312         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 313         spin_unlock(&adapter->mdio_lock);
 314         link_up = phy_data & BMSR_LSTATUS;
 315         /* notify upper layer link down ASAP */
 316         if (!link_up) {
 317                 if (netif_carrier_ok(netdev)) {
 318                         /* old link state: Up */
 319                         netif_carrier_off(netdev);
 320                         if (netif_msg_link(adapter))
 321                                 dev_info(&pdev->dev,
 322                                         "%s: %s NIC Link is Down\n",
 323                                         atl1c_driver_name, netdev->name);
 324                         adapter->link_speed = SPEED_0;
 325                 }
 326         }
 327
 328         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 329         schedule_work(&adapter->common_task);
 330 }
 331
 332 static void atl1c_common_task(struct work_struct *work)
 333 {
 334         struct atl1c_adapter *adapter;
 335         struct net_device *netdev;
 336
 337         adapter = container_of(work, struct atl1c_adapter, common_task);
 338         netdev = adapter->netdev;
 339
 340         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 341                 netif_device_detach(netdev);
 342                 atl1c_down(adapter);
 343                 atl1c_up(adapter);
 344                 netif_device_attach(netdev);
 345         }
 346
 347         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 348                 &adapter->work_event))
 349                 atl1c_check_link_status(adapter);
 350 }
 351
 352
 353 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 354 {
 355         del_timer_sync(&adapter->phy_config_timer);
 356 }
 357
 358
 359 /*
 360  * atl1c_tx_timeout - Respond to a Tx Hang
 361  * @netdev: network interface device structure
 362  */
 363 static void atl1c_tx_timeout(struct net_device *netdev)
 364 {
 365         struct atl1c_adapter *adapter = netdev_priv(netdev);
 366
 367         /* Do the reset outside of interrupt context */
 368         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 369         schedule_work(&adapter->common_task);
 370 }
 371
 372 /*
 373  * atl1c_set_multi - Multicast and Promiscuous mode set
 374  * @netdev: network interface device structure
 375  *
 376  * The set_multi entry point is called whenever the multicast address
 377  * list or the network interface flags are updated.  This routine is
 378  * responsible for configuring the hardware for proper multicast,
 379  * promiscuous mode, and all-multi behavior.
 380  */
 381 static void atl1c_set_multi(struct net_device *netdev)
 382 {
 383         struct atl1c_adapter *adapter = netdev_priv(netdev);
 384         struct atl1c_hw *hw = &adapter->hw;
 385         struct netdev_hw_addr *ha;
 386         u32 mac_ctrl_data;
 387         u32 hash_value;
 388
 389         /* Check for Promiscuous and All Multicast modes */
 390         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 391
 392         if (netdev->flags & IFF_PROMISC) {
 393                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 394         } else if (netdev->flags & IFF_ALLMULTI) {
 395                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 396                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 397         } else {
 398                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 399         }
 400
 401         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 402
 403         /* clear the old settings from the multicast hash table */
 404         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 405         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 406
 407         /* comoute mc addresses' hash value ,and put it into hash table */
 408         netdev_for_each_mc_addr(ha, netdev) {
 409                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 410                 atl1c_hash_set(hw, hash_value);
 411         }
 412 }
 413
 414 static void atl1c_vlan_rx_register(struct net_device *netdev,
 415                                    struct vlan_group *grp)
 416 {
 417         struct atl1c_adapter *adapter = netdev_priv(netdev);
 418         struct pci_dev *pdev = adapter->pdev;
 419         u32 mac_ctrl_data = 0;
 420
 421         if (netif_msg_pktdata(adapter))
 422                 dev_dbg(&pdev->dev, "atl1c_vlan_rx_register\n");
 423
 424         atl1c_irq_disable(adapter);
 425
 426         adapter->vlgrp = grp;
 427         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 428
 429         if (grp) {
 430                 /* enable VLAN tag insert/strip */
 431                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 432         } else {
 433                 /* disable VLAN tag insert/strip */
 434                 mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 435         }
 436
 437         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 438         atl1c_irq_enable(adapter);
 439 }
 440
 441 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 442 {
 443         struct pci_dev *pdev = adapter->pdev;
 444
 445         if (netif_msg_pktdata(adapter))
 446                 dev_dbg(&pdev->dev, "atl1c_restore_vlan !");
 447         atl1c_vlan_rx_register(adapter->netdev, adapter->vlgrp);
 448 }
 449 /*
 450  * atl1c_set_mac - Change the Ethernet Address of the NIC
 451  * @netdev: network interface device structure
 452  * @p: pointer to an address structure
 453  *
 454  * Returns 0 on success, negative on failure
 455  */
 456 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 457 {
 458         struct atl1c_adapter *adapter = netdev_priv(netdev);
 459         struct sockaddr *addr = p;
 460
 461         if (!is_valid_ether_addr(addr->sa_data))
 462                 return -EADDRNOTAVAIL;
 463
 464         if (netif_running(netdev))
 465                 return -EBUSY;
 466
 467         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 468         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 469
 470         atl1c_hw_set_mac_addr(&adapter->hw);
 471
 472         return 0;
 473 }
 474
 475 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 476                                 struct net_device *dev)
 477 {
 478         int mtu = dev->mtu;
 479
 480         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 481                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 482 }
 483 /*
 484  * atl1c_change_mtu - Change the Maximum Transfer Unit
 485  * @netdev: network interface device structure
 486  * @new_mtu: new value for maximum frame size
 487  *
 488  * Returns 0 on success, negative on failure
 489  */
 490 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 491 {
 492         struct atl1c_adapter *adapter = netdev_priv(netdev);
 493         int old_mtu   = netdev->mtu;
 494         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 495
 496         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 497                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 498                 if (netif_msg_link(adapter))
 499                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 500                 return -EINVAL;
 501         }
 502         /* set MTU */
 503         if (old_mtu != new_mtu && netif_running(netdev)) {
 504                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 505                         msleep(1);
 506                 netdev->mtu = new_mtu;
 507                 adapter->hw.max_frame_size = new_mtu;
 508                 atl1c_set_rxbufsize(adapter, netdev);
 509                 if (new_mtu > MAX_TSO_FRAME_SIZE) {
 510                         adapter->netdev->features &= ~NETIF_F_TSO;
 511                         adapter->netdev->features &= ~NETIF_F_TSO6;
 512                 } else {
 513                         adapter->netdev->features |= NETIF_F_TSO;
 514                         adapter->netdev->features |= NETIF_F_TSO6;
 515                 }
 516                 atl1c_down(adapter);
 517                 atl1c_up(adapter);
 518                 clear_bit(__AT_RESETTING, &adapter->flags);
 519                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 520                         u32 phy_data;
 521
 522                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 523                         phy_data |= 0x10000000;
 524                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 525                 }
 526
 527         }
 528         return 0;
 529 }
 530
 531 /*
 532  *  caller should hold mdio_lock
 533  */
 534 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 535 {
 536         struct atl1c_adapter *adapter = netdev_priv(netdev);
 537         u16 result;
 538
 539         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 540         return result;
 541 }
 542
 543 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 544                              int reg_num, int val)
 545 {
 546         struct atl1c_adapter *adapter = netdev_priv(netdev);
 547
 548         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 549 }
 550
 551 /*
 552  * atl1c_mii_ioctl -
 553  * @netdev:
 554  * @ifreq:
 555  * @cmd:
 556  */
 557 static int atl1c_mii_ioctl(struct net_device *netdev,
 558                            struct ifreq *ifr, int cmd)
 559 {
 560         struct atl1c_adapter *adapter = netdev_priv(netdev);
 561         struct pci_dev *pdev = adapter->pdev;
 562         struct mii_ioctl_data *data = if_mii(ifr);
 563         unsigned long flags;
 564         int retval = 0;
 565
 566         if (!netif_running(netdev))
 567                 return -EINVAL;
 568
 569         spin_lock_irqsave(&adapter->mdio_lock, flags);
 570         switch (cmd) {
 571         case SIOCGMIIPHY:
 572                 data->phy_id = 0;
 573                 break;
 574
 575         case SIOCGMIIREG:
 576                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 577                                     &data->val_out)) {
 578                         retval = -EIO;
 579                         goto out;
 580                 }
 581                 break;
 582
 583         case SIOCSMIIREG:
 584                 if (data->reg_num & ~(0x1F)) {
 585                         retval = -EFAULT;
 586                         goto out;
 587                 }
 588
 589                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 590                                 data->reg_num, data->val_in);
 591                 if (atl1c_write_phy_reg(&adapter->hw,
 592                                      data->reg_num, data->val_in)) {
 593                         retval = -EIO;
 594                         goto out;
 595                 }
 596                 break;
 597
 598         default:
 599                 retval = -EOPNOTSUPP;
 600                 break;
 601         }
 602 out:
 603         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 604         return retval;
 605 }
 606
 607 /*
 608  * atl1c_ioctl -
 609  * @netdev:
 610  * @ifreq:
 611  * @cmd:
 612  */
 613 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 614 {
 615         switch (cmd) {
 616         case SIOCGMIIPHY:
 617         case SIOCGMIIREG:
 618         case SIOCSMIIREG:
 619                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 620         default:
 621                 return -EOPNOTSUPP;
 622         }
 623 }
 624
 625 /*
 626  * atl1c_alloc_queues - Allocate memory for all rings
 627  * @adapter: board private structure to initialize
 628  *
 629  */
 630 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 631 {
 632         return 0;
 633 }
 634
 635 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 636 {
 637         switch (hw->device_id) {
 638         case PCI_DEVICE_ID_ATTANSIC_L2C:
 639                 hw->nic_type = athr_l2c;
 640                 break;
 641         case PCI_DEVICE_ID_ATTANSIC_L1C:
 642                 hw->nic_type = athr_l1c;
 643                 break;
 644         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 645                 hw->nic_type = athr_l2c_b;
 646                 break;
 647         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 648                 hw->nic_type = athr_l2c_b2;
 649                 break;
 650         case PCI_DEVICE_ID_ATHEROS_L1D:
 651                 hw->nic_type = athr_l1d;
 652                 break;
 653         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 654                 hw->nic_type = athr_l1d_2;
 655                 break;
 656         default:
 657                 break;
 658         }
 659 }
 660
 661 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 662 {
 663         u32 phy_status_data;
 664         u32 link_ctrl_data;
 665
 666         atl1c_set_mac_type(hw);
 667         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 668         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 669
 670         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 671                          ATL1C_TXQ_MODE_ENHANCE;
 672         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 673                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 674         if (link_ctrl_data & LINK_CTRL_L1_EN)
 675                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 676         if (link_ctrl_data & LINK_CTRL_EXT_SYNC)
 677                 hw->ctrl_flags |= ATL1C_LINK_EXT_SYNC;
 678         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 679
 680         if (hw->nic_type == athr_l1c ||
 681             hw->nic_type == athr_l1d ||
 682             hw->nic_type == athr_l1d_2)
 683                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 684         return 0;
 685 }
 686 /*
 687  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 688  * @adapter: board private structure to initialize
 689  *
 690  * atl1c_sw_init initializes the Adapter private data structure.
 691  * Fields are initialized based on PCI device information and
 692  * OS network device settings (MTU size).
 693  */
 694 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 695 {
 696         struct atl1c_hw *hw   = &adapter->hw;
 697         struct pci_dev  *pdev = adapter->pdev;
 698         u32 revision;
 699
 700
 701         adapter->wol = 0;
 702         device_set_wakeup_enable(&pdev->dev, false);
 703         adapter->link_speed = SPEED_0;
 704         adapter->link_duplex = FULL_DUPLEX;
 705         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
 706         adapter->tpd_ring[0].count = 1024;
 707         adapter->rfd_ring[0].count = 512;
 708
 709         hw->vendor_id = pdev->vendor;
 710         hw->device_id = pdev->device;
 711         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 712         hw->subsystem_id = pdev->subsystem_device;
 713         AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
 714         hw->revision_id = revision & 0xFF;
 715         /* before link up, we assume hibernate is true */
 716         hw->hibernate = true;
 717         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 718         if (atl1c_setup_mac_funcs(hw) != 0) {
 719                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 720                 return -1;
 721         }
 722         hw->intr_mask = IMR_NORMAL_MASK;
 723         hw->phy_configured = false;
 724         hw->preamble_len = 7;
 725         hw->max_frame_size = adapter->netdev->mtu;
 726         if (adapter->num_rx_queues < 2) {
 727                 hw->rss_type = atl1c_rss_disable;
 728                 hw->rss_mode = atl1c_rss_mode_disable;
 729         } else {
 730                 hw->rss_type = atl1c_rss_ipv4;
 731                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
 732                 hw->rss_hash_bits = 16;
 733         }
 734         hw->autoneg_advertised = ADVERTISED_Autoneg;
 735         hw->indirect_tab = 0xE4E4E4E4;
 736         hw->base_cpu = 0;
 737
 738         hw->ict = 50000;                /* 100ms */
 739         hw->smb_timer = 200000;         /* 400ms */
 740         hw->cmb_tpd = 4;
 741         hw->cmb_tx_timer = 1;           /* 2 us  */
 742         hw->rx_imt = 200;
 743         hw->tx_imt = 1000;
 744
 745         hw->tpd_burst = 5;
 746         hw->rfd_burst = 8;
 747         hw->dma_order = atl1c_dma_ord_out;
 748         hw->dmar_block = atl1c_dma_req_1024;
 749         hw->dmaw_block = atl1c_dma_req_1024;
 750         hw->dmar_dly_cnt = 15;
 751         hw->dmaw_dly_cnt = 4;
 752
 753         if (atl1c_alloc_queues(adapter)) {
 754                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 755                 return -ENOMEM;
 756         }
 757         /* TODO */
 758         atl1c_set_rxbufsize(adapter, adapter->netdev);
 759         atomic_set(&adapter->irq_sem, 1);
 760         spin_lock_init(&adapter->mdio_lock);
 761         spin_lock_init(&adapter->tx_lock);
 762         set_bit(__AT_DOWN, &adapter->flags);
 763
 764         return 0;
 765 }
 766
 767 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 768                                 struct atl1c_buffer *buffer_info, int in_irq)
 769 {
 770         u16 pci_driection;
 771         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 772                 return;
 773         if (buffer_info->dma) {
 774                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 775                         pci_driection = PCI_DMA_FROMDEVICE;
 776                 else
 777                         pci_driection = PCI_DMA_TODEVICE;
 778
 779                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 780                         pci_unmap_single(pdev, buffer_info->dma,
 781                                         buffer_info->length, pci_driection);
 782                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 783                         pci_unmap_page(pdev, buffer_info->dma,
 784                                         buffer_info->length, pci_driection);
 785         }
 786         if (buffer_info->skb) {
 787                 if (in_irq)
 788                         dev_kfree_skb_irq(buffer_info->skb);
 789                 else
 790                         dev_kfree_skb(buffer_info->skb);
 791         }
 792         buffer_info->dma = 0;
 793         buffer_info->skb = NULL;
 794         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 795 }
 796 /*
 797  * atl1c_clean_tx_ring - Free Tx-skb
 798  * @adapter: board private structure
 799  */
 800 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 801                                 enum atl1c_trans_queue type)
 802 {
 803         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 804         struct atl1c_buffer *buffer_info;
 805         struct pci_dev *pdev = adapter->pdev;
 806         u16 index, ring_count;
 807
 808         ring_count = tpd_ring->count;
 809         for (index = 0; index < ring_count; index++) {
 810                 buffer_info = &tpd_ring->buffer_info[index];
 811                 atl1c_clean_buffer(pdev, buffer_info, 0);
 812         }
 813
 814         /* Zero out Tx-buffers */
 815         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 816                 ring_count);
 817         atomic_set(&tpd_ring->next_to_clean, 0);
 818         tpd_ring->next_to_use = 0;
 819 }
 820
 821 /*
 822  * atl1c_clean_rx_ring - Free rx-reservation skbs
 823  * @adapter: board private structure
 824  */
 825 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 826 {
 827         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 828         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 829         struct atl1c_buffer *buffer_info;
 830         struct pci_dev *pdev = adapter->pdev;
 831         int i, j;
 832
 833         for (i = 0; i < adapter->num_rx_queues; i++) {
 834                 for (j = 0; j < rfd_ring[i].count; j++) {
 835                         buffer_info = &rfd_ring[i].buffer_info[j];
 836                         atl1c_clean_buffer(pdev, buffer_info, 0);
 837                 }
 838                 /* zero out the descriptor ring */
 839                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
 840                 rfd_ring[i].next_to_clean = 0;
 841                 rfd_ring[i].next_to_use = 0;
 842                 rrd_ring[i].next_to_use = 0;
 843                 rrd_ring[i].next_to_clean = 0;
 844         }
 845 }
 846
 847 /*
 848  * Read / Write Ptr Initialize:
 849  */
 850 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 851 {
 852         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 853         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 854         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 855         struct atl1c_buffer *buffer_info;
 856         int i, j;
 857
 858         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 859                 tpd_ring[i].next_to_use = 0;
 860                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 861                 buffer_info = tpd_ring[i].buffer_info;
 862                 for (j = 0; j < tpd_ring->count; j++)
 863                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 864                                         ATL1C_BUFFER_FREE);
 865         }
 866         for (i = 0; i < adapter->num_rx_queues; i++) {
 867                 rfd_ring[i].next_to_use = 0;
 868                 rfd_ring[i].next_to_clean = 0;
 869                 rrd_ring[i].next_to_use = 0;
 870                 rrd_ring[i].next_to_clean = 0;
 871                 for (j = 0; j < rfd_ring[i].count; j++) {
 872                         buffer_info = &rfd_ring[i].buffer_info[j];
 873                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 874                 }
 875         }
 876 }
 877
 878 /*
 879  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 880  * @adapter: board private structure
 881  *
 882  * Free all transmit software resources
 883  */
 884 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 885 {
 886         struct pci_dev *pdev = adapter->pdev;
 887
 888         pci_free_consistent(pdev, adapter->ring_header.size,
 889                                         adapter->ring_header.desc,
 890                                         adapter->ring_header.dma);
 891         adapter->ring_header.desc = NULL;
 892
 893         /* Note: just free tdp_ring.buffer_info,
 894         *  it contain rfd_ring.buffer_info, do not double free */
 895         if (adapter->tpd_ring[0].buffer_info) {
 896                 kfree(adapter->tpd_ring[0].buffer_info);
 897                 adapter->tpd_ring[0].buffer_info = NULL;
 898         }
 899 }
 900
 901 /*
 902  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 903  * @adapter: board private structure
 904  *
 905  * Return 0 on success, negative on failure
 906  */
 907 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 908 {
 909         struct pci_dev *pdev = adapter->pdev;
 910         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 911         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 912         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 913         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 914         int num_rx_queues = adapter->num_rx_queues;
 915         int size;
 916         int i;
 917         int count = 0;
 918         int rx_desc_count = 0;
 919         u32 offset = 0;
 920
 921         rrd_ring[0].count = rfd_ring[0].count;
 922         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 923                 tpd_ring[i].count = tpd_ring[0].count;
 924
 925         for (i = 1; i < adapter->num_rx_queues; i++)
 926                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
 927
 928         /* 2 tpd queue, one high priority queue,
 929          * another normal priority queue */
 930         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 931                 rfd_ring->count * num_rx_queues);
 932         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 933         if (unlikely(!tpd_ring->buffer_info)) {
 934                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 935                         size);
 936                 goto err_nomem;
 937         }
 938         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 939                 tpd_ring[i].buffer_info =
 940                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 941                 count += tpd_ring[i].count;
 942         }
 943
 944         for (i = 0; i < num_rx_queues; i++) {
 945                 rfd_ring[i].buffer_info =
 946                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 947                 count += rfd_ring[i].count;
 948                 rx_desc_count += rfd_ring[i].count;
 949         }
 950         /*
 951          * real ring DMA buffer
 952          * each ring/block may need up to 8 bytes for alignment, hence the
 953          * additional bytes tacked onto the end.
 954          */
 955         ring_header->size = size =
 956                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 957                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 958                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 959                 sizeof(struct atl1c_hw_stats) +
 960                 8 * 4 + 8 * 2 * num_rx_queues;
 961
 962         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 963                                 &ring_header->dma);
 964         if (unlikely(!ring_header->desc)) {
 965                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 966                 goto err_nomem;
 967         }
 968         memset(ring_header->desc, 0, ring_header->size);
 969         /* init TPD ring */
 970
 971         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 972         offset = tpd_ring[0].dma - ring_header->dma;
 973         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 974                 tpd_ring[i].dma = ring_header->dma + offset;
 975                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
 976                 tpd_ring[i].size =
 977                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
 978                 offset += roundup(tpd_ring[i].size, 8);
 979         }
 980         /* init RFD ring */
 981         for (i = 0; i < num_rx_queues; i++) {
 982                 rfd_ring[i].dma = ring_header->dma + offset;
 983                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
 984                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
 985                                 rfd_ring[i].count;
 986                 offset += roundup(rfd_ring[i].size, 8);
 987         }
 988
 989         /* init RRD ring */
 990         for (i = 0; i < num_rx_queues; i++) {
 991                 rrd_ring[i].dma = ring_header->dma + offset;
 992                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
 993                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
 994                                 rrd_ring[i].count;
 995                 offset += roundup(rrd_ring[i].size, 8);
 996         }
 997
 998         adapter->smb.dma = ring_header->dma + offset;
 999         adapter->smb.smb = (u8 *)ring_header->desc + offset;
1000         return 0;
1001
1002 err_nomem:
1003         kfree(tpd_ring->buffer_info);
1004         return -ENOMEM;
1005 }
1006
1007 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1008 {
1009         struct atl1c_hw *hw = &adapter->hw;
1010         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
1011                                 adapter->rfd_ring;
1012         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
1013                                 adapter->rrd_ring;
1014         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1015                                 adapter->tpd_ring;
1016         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
1017         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
1018         int i;
1019         u32 data;
1020
1021         /* TPD */
1022         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1023                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1024                                 AT_DMA_HI_ADDR_MASK) >> 32));
1025         /* just enable normal priority TX queue */
1026         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
1027                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1028                                 AT_DMA_LO_ADDR_MASK));
1029         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
1030                         (u32)(tpd_ring[atl1c_trans_high].dma &
1031                                 AT_DMA_LO_ADDR_MASK));
1032         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1033                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1034
1035
1036         /* RFD */
1037         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1038                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
1039         for (i = 0; i < adapter->num_rx_queues; i++)
1040                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
1041                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1042
1043         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1044                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
1045         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1046                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1047
1048         /* RRD */
1049         for (i = 0; i < adapter->num_rx_queues; i++)
1050                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
1051                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1052         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1053                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
1054
1055         /* CMB */
1056         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
1057
1058         /* SMB */
1059         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
1060                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1061         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
1062                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
1063         if (hw->nic_type == athr_l2c_b) {
1064                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1065                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1066                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1067                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1068                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1069                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1070                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1071                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1072         }
1073         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d_2) {
1074                         /* Power Saving for L2c_B */
1075                 AT_READ_REG(hw, REG_SERDES_LOCK, &data);
1076                 data |= SERDES_MAC_CLK_SLOWDOWN;
1077                 data |= SERDES_PYH_CLK_SLOWDOWN;
1078                 AT_WRITE_REG(hw, REG_SERDES_LOCK, data);
1079         }
1080         /* Load all of base address above */
1081         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1082 }
1083
1084 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1085 {
1086         struct atl1c_hw *hw = &adapter->hw;
1087         u32 dev_ctrl_data;
1088         u32 max_pay_load;
1089         u16 tx_offload_thresh;
1090         u32 txq_ctrl_data;
1091         u32 extra_size = 0;     /* Jumbo frame threshold in QWORD unit */
1092         u32 max_pay_load_data;
1093
1094         extra_size = ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN;
1095         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1096         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1097                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1098         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1099         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1100                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1101         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
1102         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1103                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1104         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1105
1106         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1107                         TXQ_NUM_TPD_BURST_SHIFT;
1108         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1109                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1110         max_pay_load_data = (atl1c_pay_load_size[hw->dmar_block] &
1111                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1112         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2)
1113                 max_pay_load_data >>= 1;
1114         txq_ctrl_data |= max_pay_load_data;
1115
1116         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1117 }
1118
1119 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1120 {
1121         struct atl1c_hw *hw = &adapter->hw;
1122         u32 rxq_ctrl_data;
1123
1124         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1125                         RXQ_RFD_BURST_NUM_SHIFT;
1126
1127         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1128                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1129         if (hw->rss_type == atl1c_rss_ipv4)
1130                 rxq_ctrl_data |= RSS_HASH_IPV4;
1131         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1132                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1133         if (hw->rss_type == atl1c_rss_ipv6)
1134                 rxq_ctrl_data |= RSS_HASH_IPV6;
1135         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1136                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1137         if (hw->rss_type != atl1c_rss_disable)
1138                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1139
1140         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1141                         RSS_MODE_SHIFT;
1142         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1143                         RSS_HASH_BITS_SHIFT;
1144         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1145                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_1M &
1146                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1147
1148         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1149 }
1150
1151 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1152 {
1153         struct atl1c_hw *hw = &adapter->hw;
1154
1155         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1156         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1157 }
1158
1159 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1160 {
1161         struct atl1c_hw *hw = &adapter->hw;
1162         u32 dma_ctrl_data;
1163
1164         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1165         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1166                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1167         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1168                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1169         else
1170                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1171
1172         switch (hw->dma_order) {
1173         case atl1c_dma_ord_in:
1174                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1175                 break;
1176         case atl1c_dma_ord_enh:
1177                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1178                 break;
1179         case atl1c_dma_ord_out:
1180                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1181                 break;
1182         default:
1183                 break;
1184         }
1185
1186         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1187                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1188         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1189                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1190         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1191                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1192         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1193                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1194
1195         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1196 }
1197
1198 /*
1199  * Stop the mac, transmit and receive units
1200  * hw - Struct containing variables accessed by shared code
1201  * return : 0  or  idle status (if error)
1202  */
1203 static int atl1c_stop_mac(struct atl1c_hw *hw)
1204 {
1205         u32 data;
1206
1207         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1208         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1209                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1210         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1211
1212         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1213         data &= ~TXQ_CTRL_EN;
1214         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1215
1216         atl1c_wait_until_idle(hw);
1217
1218         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1219         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1220         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1221
1222         return (int)atl1c_wait_until_idle(hw);
1223 }
1224
1225 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1226 {
1227         u32 data;
1228
1229         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1230         switch (hw->adapter->num_rx_queues) {
1231         case 4:
1232                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1233                 break;
1234         case 3:
1235                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1236                 break;
1237         case 2:
1238                 data |= RXQ1_CTRL_EN;
1239                 break;
1240         default:
1241                 break;
1242         }
1243         data |= RXQ_CTRL_EN;
1244         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1245 }
1246
1247 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1248 {
1249         u32 data;
1250
1251         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1252         data |= TXQ_CTRL_EN;
1253         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1254 }
1255
1256 /*
1257  * Reset the transmit and receive units; mask and clear all interrupts.
1258  * hw - Struct containing variables accessed by shared code
1259  * return : 0  or  idle status (if error)
1260  */
1261 static int atl1c_reset_mac(struct atl1c_hw *hw)
1262 {
1263         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1264         struct pci_dev *pdev = adapter->pdev;
1265         u32 master_ctrl_data = 0;
1266
1267         AT_WRITE_REG(hw, REG_IMR, 0);
1268         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1269
1270         atl1c_stop_mac(hw);
1271         /*
1272          * Issue Soft Reset to the MAC.  This will reset the chip's
1273          * transmit, receive, DMA.  It will not effect
1274          * the current PCI configuration.  The global reset bit is self-
1275          * clearing, and should clear within a microsecond.
1276          */
1277         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1278         master_ctrl_data |= MASTER_CTRL_OOB_DIS_OFF;
1279         AT_WRITE_REGW(hw, REG_MASTER_CTRL, ((master_ctrl_data | MASTER_CTRL_SOFT_RST)
1280                         & 0xFFFF));
1281
1282         AT_WRITE_FLUSH(hw);
1283         msleep(10);
1284         /* Wait at least 10ms for All module to be Idle */
1285
1286         if (atl1c_wait_until_idle(hw)) {
1287                 dev_err(&pdev->dev,
1288                         "MAC state machine can't be idle since"
1289                         " disabled for 10ms second\n");
1290                 return -1;
1291         }
1292         return 0;
1293 }
1294
1295 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1296 {
1297         u32 pm_ctrl_data;
1298
1299         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1300         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1301                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1302         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1303         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1304         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1305         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1306         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1307
1308         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1309         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1310         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1311         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1312 }
1313
1314 /*
1315  * Set ASPM state.
1316  * Enable/disable L0s/L1 depend on link state.
1317  */
1318 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1319 {
1320         u32 pm_ctrl_data;
1321         u32 link_ctrl_data;
1322         u32 link_l1_timer = 0xF;
1323
1324         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1325         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
1326
1327         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1328         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1329                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1330         pm_ctrl_data &= ~(PM_CTRL_LCKDET_TIMER_MASK <<
1331                         PM_CTRL_LCKDET_TIMER_SHIFT);
1332         pm_ctrl_data |= AT_LCKDET_TIMER << PM_CTRL_LCKDET_TIMER_SHIFT;
1333
1334         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1335                 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1336                 link_ctrl_data &= ~LINK_CTRL_EXT_SYNC;
1337                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE)) {
1338                         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10)
1339                                 link_ctrl_data |= LINK_CTRL_EXT_SYNC;
1340                 }
1341
1342                 AT_WRITE_REG(hw, REG_LINK_CTRL, link_ctrl_data);
1343
1344                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER;
1345                 pm_ctrl_data &= ~(PM_CTRL_PM_REQ_TIMER_MASK <<
1346                         PM_CTRL_PM_REQ_TIMER_SHIFT);
1347                 pm_ctrl_data |= AT_ASPM_L1_TIMER <<
1348                         PM_CTRL_PM_REQ_TIMER_SHIFT;
1349                 pm_ctrl_data &= ~PM_CTRL_SA_DLY_EN;
1350                 pm_ctrl_data &= ~PM_CTRL_HOTRST;
1351                 pm_ctrl_data |= 1 << PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1352                 pm_ctrl_data |= PM_CTRL_SERDES_PD_EX_L1;
1353         }
1354         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1355         if (linkup) {
1356                 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1357                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1358                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1359                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1360                 if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1361                         pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN;
1362
1363                 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1364                         hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1365                         if (hw->nic_type == athr_l2c_b)
1366                                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE))
1367                                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1368                         pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1369                         pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1370                         pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1371                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1372                 if (hw->adapter->link_speed == SPEED_100 ||
1373                                 hw->adapter->link_speed == SPEED_1000) {
1374                                 pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1375                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1376                                 if (hw->nic_type == athr_l2c_b)
1377                                         link_l1_timer = 7;
1378                                 else if (hw->nic_type == athr_l2c_b2 ||
1379                                         hw->nic_type == athr_l1d_2)
1380                                         link_l1_timer = 4;
1381                                 pm_ctrl_data |= link_l1_timer <<
1382                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1383                         }
1384                 } else {
1385                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1386                         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1387                         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1388                         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1389                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1390                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1391
1392                 }
1393         } else {
1394                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1395                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1396                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1397                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1398
1399                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1400                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1401                 else
1402                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1403         }
1404         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1405
1406         return;
1407 }
1408
1409 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1410 {
1411         struct atl1c_hw *hw = &adapter->hw;
1412         struct net_device *netdev = adapter->netdev;
1413         u32 mac_ctrl_data;
1414
1415         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1416         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1417
1418         if (adapter->link_duplex == FULL_DUPLEX) {
1419                 hw->mac_duplex = true;
1420                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1421         }
1422
1423         if (adapter->link_speed == SPEED_1000)
1424                 hw->mac_speed = atl1c_mac_speed_1000;
1425         else
1426                 hw->mac_speed = atl1c_mac_speed_10_100;
1427
1428         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1429                         MAC_CTRL_SPEED_SHIFT;
1430
1431         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1432         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1433                         MAC_CTRL_PRMLEN_SHIFT);
1434
1435         if (adapter->vlgrp)
1436                 mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
1437
1438         mac_ctrl_data |= MAC_CTRL_BC_EN;
1439         if (netdev->flags & IFF_PROMISC)
1440                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1441         if (netdev->flags & IFF_ALLMULTI)
1442                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1443
1444         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1445         if (hw->nic_type == athr_l1d || hw->nic_type == athr_l2c_b2 ||
1446             hw->nic_type == athr_l1d_2) {
1447                 mac_ctrl_data |= MAC_CTRL_SPEED_MODE_SW;
1448                 mac_ctrl_data |= MAC_CTRL_HASH_ALG_CRC32;
1449         }
1450         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1451 }
1452
1453 /*
1454  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1455  * @adapter: board private structure
1456  *
1457  * Configure the Tx /Rx unit of the MAC after a reset.
1458  */
1459 static int atl1c_configure(struct atl1c_adapter *adapter)
1460 {
1461         struct atl1c_hw *hw = &adapter->hw;
1462         u32 master_ctrl_data = 0;
1463         u32 intr_modrt_data;
1464         u32 data;
1465
1466         /* clear interrupt status */
1467         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1468         /*  Clear any WOL status */
1469         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1470         /* set Interrupt Clear Timer
1471          * HW will enable self to assert interrupt event to system after
1472          * waiting x-time for software to notify it accept interrupt.
1473          */
1474
1475         data = CLK_GATING_EN_ALL;
1476         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1477                 if (hw->nic_type == athr_l2c_b)
1478                         data &= ~CLK_GATING_RXMAC_EN;
1479         } else
1480                 data = 0;
1481         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1482
1483         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1484                 hw->ict & INT_RETRIG_TIMER_MASK);
1485
1486         atl1c_configure_des_ring(adapter);
1487
1488         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1489                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1490                                         IRQ_MODRT_TX_TIMER_SHIFT;
1491                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1492                                         IRQ_MODRT_RX_TIMER_SHIFT;
1493                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1494                 master_ctrl_data |=
1495                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1496         }
1497
1498         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1499                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1500
1501         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1502         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1503
1504         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1505                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1506                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1507                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1508                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1509         }
1510
1511         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1512                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1513                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1514         /* set MTU */
1515         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1516                         VLAN_HLEN + ETH_FCS_LEN);
1517         /* HDS, disable */
1518         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1519
1520         atl1c_configure_tx(adapter);
1521         atl1c_configure_rx(adapter);
1522         atl1c_configure_rss(adapter);
1523         atl1c_configure_dma(adapter);
1524
1525         return 0;
1526 }
1527
1528 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1529 {
1530         u16 hw_reg_addr = 0;
1531         unsigned long *stats_item = NULL;
1532         u32 data;
1533
1534         /* update rx status */
1535         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1536         stats_item  = &adapter->hw_stats.rx_ok;
1537         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1538                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1539                 *stats_item += data;
1540                 stats_item++;
1541                 hw_reg_addr += 4;
1542         }
1543 /* update tx status */
1544         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1545         stats_item  = &adapter->hw_stats.tx_ok;
1546         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1547                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1548                 *stats_item += data;
1549                 stats_item++;
1550                 hw_reg_addr += 4;
1551         }
1552 }
1553
1554 /*
1555  * atl1c_get_stats - Get System Network Statistics
1556  * @netdev: network interface device structure
1557  *
1558  * Returns the address of the device statistics structure.
1559  * The statistics are actually updated from the timer callback.
1560  */
1561 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1562 {
1563         struct atl1c_adapter *adapter = netdev_priv(netdev);
1564         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1565         struct net_device_stats *net_stats = &netdev->stats;
1566
1567         atl1c_update_hw_stats(adapter);
1568         net_stats->rx_packets = hw_stats->rx_ok;
1569         net_stats->tx_packets = hw_stats->tx_ok;
1570         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1571         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1572         net_stats->multicast  = hw_stats->rx_mcast;
1573         net_stats->collisions = hw_stats->tx_1_col +
1574                                 hw_stats->tx_2_col * 2 +
1575                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1576         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1577                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1578                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1579         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1580         net_stats->rx_length_errors = hw_stats->rx_len_err;
1581         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1582         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1583         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1584
1585         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1586
1587         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1588                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1589         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1590         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1591         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1592
1593         return net_stats;
1594 }
1595
1596 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1597 {
1598         u16 phy_data;
1599
1600         spin_lock(&adapter->mdio_lock);
1601         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1602         spin_unlock(&adapter->mdio_lock);
1603 }
1604
1605 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1606                                 enum atl1c_trans_queue type)
1607 {
1608         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1609                                 &adapter->tpd_ring[type];
1610         struct atl1c_buffer *buffer_info;
1611         struct pci_dev *pdev = adapter->pdev;
1612         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1613         u16 hw_next_to_clean;
1614         u16 shift;
1615         u32 data;
1616
1617         if (type == atl1c_trans_high)
1618                 shift = MB_HTPD_CONS_IDX_SHIFT;
1619         else
1620                 shift = MB_NTPD_CONS_IDX_SHIFT;
1621
1622         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1623         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1624
1625         while (next_to_clean != hw_next_to_clean) {
1626                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1627                 atl1c_clean_buffer(pdev, buffer_info, 1);
1628                 if (++next_to_clean == tpd_ring->count)
1629                         next_to_clean = 0;
1630                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1631         }
1632
1633         if (netif_queue_stopped(adapter->netdev) &&
1634                         netif_carrier_ok(adapter->netdev)) {
1635                 netif_wake_queue(adapter->netdev);
1636         }
1637
1638         return true;
1639 }
1640
1641 /*
1642  * atl1c_intr - Interrupt Handler
1643  * @irq: interrupt number
1644  * @data: pointer to a network interface device structure
1645  * @pt_regs: CPU registers structure
1646  */
1647 static irqreturn_t atl1c_intr(int irq, void *data)
1648 {
1649         struct net_device *netdev  = data;
1650         struct atl1c_adapter *adapter = netdev_priv(netdev);
1651         struct pci_dev *pdev = adapter->pdev;
1652         struct atl1c_hw *hw = &adapter->hw;
1653         int max_ints = AT_MAX_INT_WORK;
1654         int handled = IRQ_NONE;
1655         u32 status;
1656         u32 reg_data;
1657
1658         do {
1659                 AT_READ_REG(hw, REG_ISR, &reg_data);
1660                 status = reg_data & hw->intr_mask;
1661
1662                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1663                         if (max_ints != AT_MAX_INT_WORK)
1664                                 handled = IRQ_HANDLED;
1665                         break;
1666                 }
1667                 /* link event */
1668                 if (status & ISR_GPHY)
1669                         atl1c_clear_phy_int(adapter);
1670                 /* Ack ISR */
1671                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1672                 if (status & ISR_RX_PKT) {
1673                         if (likely(napi_schedule_prep(&adapter->napi))) {
1674                                 hw->intr_mask &= ~ISR_RX_PKT;
1675                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1676                                 __napi_schedule(&adapter->napi);
1677                         }
1678                 }
1679                 if (status & ISR_TX_PKT)
1680                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1681
1682                 handled = IRQ_HANDLED;
1683                 /* check if PCIE PHY Link down */
1684                 if (status & ISR_ERROR) {
1685                         if (netif_msg_hw(adapter))
1686                                 dev_err(&pdev->dev,
1687                                         "atl1c hardware error (status = 0x%x)\n",
1688                                         status & ISR_ERROR);
1689                         /* reset MAC */
1690                         adapter->work_event |= ATL1C_WORK_EVENT_RESET;
1691                         schedule_work(&adapter->common_task);
1692                         return IRQ_HANDLED;
1693                 }
1694
1695                 if (status & ISR_OVER)
1696                         if (netif_msg_intr(adapter))
1697                                 dev_warn(&pdev->dev,
1698                                         "TX/RX overflow (status = 0x%x)\n",
1699                                         status & ISR_OVER);
1700
1701                 /* link event */
1702                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1703                         netdev->stats.tx_carrier_errors++;
1704                         atl1c_link_chg_event(adapter);
1705                         break;
1706                 }
1707
1708         } while (--max_ints > 0);
1709         /* re-enable Interrupt*/
1710         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1711         return handled;
1712 }
1713
1714 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1715                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1716 {
1717         /*
1718          * The pid field in RRS in not correct sometimes, so we
1719          * cannot figure out if the packet is fragmented or not,
1720          * so we tell the KERNEL CHECKSUM_NONE
1721          */
1722         skb_checksum_none_assert(skb);
1723 }
1724
1725 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1726 {
1727         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1728         struct pci_dev *pdev = adapter->pdev;
1729         struct atl1c_buffer *buffer_info, *next_info;
1730         struct sk_buff *skb;
1731         void *vir_addr = NULL;
1732         u16 num_alloc = 0;
1733         u16 rfd_next_to_use, next_next;
1734         struct atl1c_rx_free_desc *rfd_desc;
1735
1736         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1737         if (++next_next == rfd_ring->count)
1738                 next_next = 0;
1739         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1740         next_info = &rfd_ring->buffer_info[next_next];
1741
1742         while (next_info->flags & ATL1C_BUFFER_FREE) {
1743                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1744
1745                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1746                 if (unlikely(!skb)) {
1747                         if (netif_msg_rx_err(adapter))
1748                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1749                         break;
1750                 }
1751
1752                 /*
1753                  * Make buffer alignment 2 beyond a 16 byte boundary
1754                  * this will result in a 16 byte aligned IP header after
1755                  * the 14 byte MAC header is removed
1756                  */
1757                 vir_addr = skb->data;
1758                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1759                 buffer_info->skb = skb;
1760                 buffer_info->length = adapter->rx_buffer_len;
1761                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1762                                                 buffer_info->length,
1763                                                 PCI_DMA_FROMDEVICE);
1764                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1765                         ATL1C_PCIMAP_FROMDEVICE);
1766                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1767                 rfd_next_to_use = next_next;
1768                 if (++next_next == rfd_ring->count)
1769                         next_next = 0;
1770                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1771                 next_info = &rfd_ring->buffer_info[next_next];
1772                 num_alloc++;
1773         }
1774
1775         if (num_alloc) {
1776                 /* TODO: update mailbox here */
1777                 wmb();
1778                 rfd_ring->next_to_use = rfd_next_to_use;
1779                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1780                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1781         }
1782
1783         return num_alloc;
1784 }
1785
1786 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1787                         struct  atl1c_recv_ret_status *rrs, u16 num)
1788 {
1789         u16 i;
1790         /* the relationship between rrd and rfd is one map one */
1791         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1792                                         rrd_ring->next_to_clean)) {
1793                 rrs->word3 &= ~RRS_RXD_UPDATED;
1794                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1795                         rrd_ring->next_to_clean = 0;
1796         }
1797 }
1798
1799 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1800         struct atl1c_recv_ret_status *rrs, u16 num)
1801 {
1802         u16 i;
1803         u16 rfd_index;
1804         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1805
1806         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1807                         RRS_RX_RFD_INDEX_MASK;
1808         for (i = 0; i < num; i++) {
1809                 buffer_info[rfd_index].skb = NULL;
1810                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1811                                         ATL1C_BUFFER_FREE);
1812                 if (++rfd_index == rfd_ring->count)
1813                         rfd_index = 0;
1814         }
1815         rfd_ring->next_to_clean = rfd_index;
1816 }
1817
1818 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1819                    int *work_done, int work_to_do)
1820 {
1821         u16 rfd_num, rfd_index;
1822         u16 count = 0;
1823         u16 length;
1824         struct pci_dev *pdev = adapter->pdev;
1825         struct net_device *netdev  = adapter->netdev;
1826         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1827         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1828         struct sk_buff *skb;
1829         struct atl1c_recv_ret_status *rrs;
1830         struct atl1c_buffer *buffer_info;
1831
1832         while (1) {
1833                 if (*work_done >= work_to_do)
1834                         break;
1835                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1836                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1837                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1838                                 RRS_RX_RFD_CNT_MASK;
1839                         if (unlikely(rfd_num != 1))
1840                                 /* TODO support mul rfd*/
1841                                 if (netif_msg_rx_err(adapter))
1842                                         dev_warn(&pdev->dev,
1843                                                 "Multi rfd not support yet!\n");
1844                         goto rrs_checked;
1845                 } else {
1846                         break;
1847                 }
1848 rrs_checked:
1849                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1850                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1851                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1852                                 if (netif_msg_rx_err(adapter))
1853                                         dev_warn(&pdev->dev,
1854                                                 "wrong packet! rrs word3 is %x\n",
1855                                                 rrs->word3);
1856                         continue;
1857                 }
1858
1859                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1860                                 RRS_PKT_SIZE_MASK);
1861                 /* Good Receive */
1862                 if (likely(rfd_num == 1)) {
1863                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1864                                         RRS_RX_RFD_INDEX_MASK;
1865                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1866                         pci_unmap_single(pdev, buffer_info->dma,
1867                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1868                         skb = buffer_info->skb;
1869                 } else {
1870                         /* TODO */
1871                         if (netif_msg_rx_err(adapter))
1872                                 dev_warn(&pdev->dev,
1873                                         "Multi rfd not support yet!\n");
1874                         break;
1875                 }
1876                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1877                 skb_put(skb, length - ETH_FCS_LEN);
1878                 skb->protocol = eth_type_trans(skb, netdev);
1879                 atl1c_rx_checksum(adapter, skb, rrs);
1880                 if (unlikely(adapter->vlgrp) && rrs->word3 & RRS_VLAN_INS) {
1881                         u16 vlan;
1882
1883                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1884                         vlan = le16_to_cpu(vlan);
1885                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, vlan);
1886                 } else
1887                         netif_receive_skb(skb);
1888
1889                 (*work_done)++;
1890                 count++;
1891         }
1892         if (count)
1893                 atl1c_alloc_rx_buffer(adapter, que);
1894 }
1895
1896 /*
1897  * atl1c_clean - NAPI Rx polling callback
1898  * @adapter: board private structure
1899  */
1900 static int atl1c_clean(struct napi_struct *napi, int budget)
1901 {
1902         struct atl1c_adapter *adapter =
1903                         container_of(napi, struct atl1c_adapter, napi);
1904         int work_done = 0;
1905
1906         /* Keep link state information with original netdev */
1907         if (!netif_carrier_ok(adapter->netdev))
1908                 goto quit_polling;
1909         /* just enable one RXQ */
1910         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1911
1912         if (work_done < budget) {
1913 quit_polling:
1914                 napi_complete(napi);
1915                 adapter->hw.intr_mask |= ISR_RX_PKT;
1916                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1917         }
1918         return work_done;
1919 }
1920
1921 #ifdef CONFIG_NET_POLL_CONTROLLER
1922
1923 /*
1924  * Polling 'interrupt' - used by things like netconsole to send skbs
1925  * without having to re-enable interrupts. It's not called while
1926  * the interrupt routine is executing.
1927  */
1928 static void atl1c_netpoll(struct net_device *netdev)
1929 {
1930         struct atl1c_adapter *adapter = netdev_priv(netdev);
1931
1932         disable_irq(adapter->pdev->irq);
1933         atl1c_intr(adapter->pdev->irq, netdev);
1934         enable_irq(adapter->pdev->irq);
1935 }
1936 #endif
1937
1938 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1939 {
1940         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1941         u16 next_to_use = 0;
1942         u16 next_to_clean = 0;
1943
1944         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1945         next_to_use   = tpd_ring->next_to_use;
1946
1947         return (u16)(next_to_clean > next_to_use) ?
1948                 (next_to_clean - next_to_use - 1) :
1949                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1950 }
1951
1952 /*
1953  * get next usable tpd
1954  * Note: should call atl1c_tdp_avail to make sure
1955  * there is enough tpd to use
1956  */
1957 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1958         enum atl1c_trans_queue type)
1959 {
1960         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1961         struct atl1c_tpd_desc *tpd_desc;
1962         u16 next_to_use = 0;
1963
1964         next_to_use = tpd_ring->next_to_use;
1965         if (++tpd_ring->next_to_use == tpd_ring->count)
1966                 tpd_ring->next_to_use = 0;
1967         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1968         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1969         return  tpd_desc;
1970 }
1971
1972 static struct atl1c_buffer *
1973 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1974 {
1975         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1976
1977         return &tpd_ring->buffer_info[tpd -
1978                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1979 }
1980
1981 /* Calculate the transmit packet descript needed*/
1982 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1983 {
1984         u16 tpd_req;
1985         u16 proto_hdr_len = 0;
1986
1987         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1988
1989         if (skb_is_gso(skb)) {
1990                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1991                 if (proto_hdr_len < skb_headlen(skb))
1992                         tpd_req++;
1993                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1994                         tpd_req++;
1995         }
1996         return tpd_req;
1997 }
1998
1999 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
2000                           struct sk_buff *skb,
2001                           struct atl1c_tpd_desc **tpd,
2002                           enum atl1c_trans_queue type)
2003 {
2004         struct pci_dev *pdev = adapter->pdev;
2005         u8 hdr_len;
2006         u32 real_len;
2007         unsigned short offload_type;
2008         int err;
2009
2010         if (skb_is_gso(skb)) {
2011                 if (skb_header_cloned(skb)) {
2012                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2013                         if (unlikely(err))
2014                                 return -1;
2015                 }
2016                 offload_type = skb_shinfo(skb)->gso_type;
2017
2018                 if (offload_type & SKB_GSO_TCPV4) {
2019                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2020                                         + ntohs(ip_hdr(skb)->tot_len));
2021
2022                         if (real_len < skb->len)
2023                                 pskb_trim(skb, real_len);
2024
2025                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2026                         if (unlikely(skb->len == hdr_len)) {
2027                                 /* only xsum need */
2028                                 if (netif_msg_tx_queued(adapter))
2029                                         dev_warn(&pdev->dev,
2030                                                 "IPV4 tso with zero data??\n");
2031                                 goto check_sum;
2032                         } else {
2033                                 ip_hdr(skb)->check = 0;
2034                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2035                                                         ip_hdr(skb)->saddr,
2036                                                         ip_hdr(skb)->daddr,
2037                                                         0, IPPROTO_TCP, 0);
2038                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2039                         }
2040                 }
2041
2042                 if (offload_type & SKB_GSO_TCPV6) {
2043                         struct atl1c_tpd_ext_desc *etpd =
2044                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2045
2046                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2047                         *tpd = atl1c_get_tpd(adapter, type);
2048                         ipv6_hdr(skb)->payload_len = 0;
2049                         /* check payload == 0 byte ? */
2050                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2051                         if (unlikely(skb->len == hdr_len)) {
2052                                 /* only xsum need */
2053                                 if (netif_msg_tx_queued(adapter))
2054                                         dev_warn(&pdev->dev,
2055                                                 "IPV6 tso with zero data??\n");
2056                                 goto check_sum;
2057                         } else
2058                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2059                                                 &ipv6_hdr(skb)->saddr,
2060                                                 &ipv6_hdr(skb)->daddr,
2061                                                 0, IPPROTO_TCP, 0);
2062                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2063                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2064                         etpd->pkt_len = cpu_to_le32(skb->len);
2065                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2066                 }
2067
2068                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2069                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2070                                 TPD_TCPHDR_OFFSET_SHIFT;
2071                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2072                                 TPD_MSS_SHIFT;
2073                 return 0;
2074         }
2075
2076 check_sum:
2077         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2078                 u8 css, cso;
2079                 cso = skb_checksum_start_offset(skb);
2080
2081                 if (unlikely(cso & 0x1)) {
2082                         if (netif_msg_tx_err(adapter))
2083                                 dev_err(&adapter->pdev->dev,
2084                                         "payload offset should not an event number\n");
2085                         return -1;
2086                 } else {
2087                         css = cso + skb->csum_offset;
2088
2089                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2090                                         TPD_PLOADOFFSET_SHIFT;
2091                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2092                                         TPD_CCSUM_OFFSET_SHIFT;
2093                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2094                 }
2095         }
2096         return 0;
2097 }
2098
2099 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2100                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2101                         enum atl1c_trans_queue type)
2102 {
2103         struct atl1c_tpd_desc *use_tpd = NULL;
2104         struct atl1c_buffer *buffer_info = NULL;
2105         u16 buf_len = skb_headlen(skb);
2106         u16 map_len = 0;
2107         u16 mapped_len = 0;
2108         u16 hdr_len = 0;
2109         u16 nr_frags;
2110         u16 f;
2111         int tso;
2112
2113         nr_frags = skb_shinfo(skb)->nr_frags;
2114         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2115         if (tso) {
2116                 /* TSO */
2117                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2118                 use_tpd = tpd;
2119
2120                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2121                 buffer_info->length = map_len;
2122                 buffer_info->dma = pci_map_single(adapter->pdev,
2123                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2124                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2125                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2126                         ATL1C_PCIMAP_TODEVICE);
2127                 mapped_len += map_len;
2128                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2129                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2130         }
2131
2132         if (mapped_len < buf_len) {
2133                 /* mapped_len == 0, means we should use the first tpd,
2134                    which is given by caller  */
2135                 if (mapped_len == 0)
2136                         use_tpd = tpd;
2137                 else {
2138                         use_tpd = atl1c_get_tpd(adapter, type);
2139                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2140                 }
2141                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2142                 buffer_info->length = buf_len - mapped_len;
2143                 buffer_info->dma =
2144                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2145                                         buffer_info->length, PCI_DMA_TODEVICE);
2146                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2147                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2148                         ATL1C_PCIMAP_TODEVICE);
2149                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2150                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2151         }
2152
2153         for (f = 0; f < nr_frags; f++) {
2154                 struct skb_frag_struct *frag;
2155
2156                 frag = &skb_shinfo(skb)->frags[f];
2157
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 = frag->size;
2163                 buffer_info->dma =
2164                         pci_map_page(adapter->pdev, frag->page,
2165                                         frag->page_offset,
2166                                         buffer_info->length,
2167                                         PCI_DMA_TODEVICE);
2168                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2169                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2170                         ATL1C_PCIMAP_TODEVICE);
2171                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2172                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2173         }
2174
2175         /* The last tpd */
2176         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2177         /* The last buffer info contain the skb address,
2178            so it will be free after unmap */
2179         buffer_info->skb = skb;
2180 }
2181
2182 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2183                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2184 {
2185         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2186         u32 prod_data;
2187
2188         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2189         switch (type) {
2190         case atl1c_trans_high:
2191                 prod_data &= 0xFFFF0000;
2192                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2193                 break;
2194         case atl1c_trans_normal:
2195                 prod_data &= 0x0000FFFF;
2196                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2197                 break;
2198         default:
2199                 break;
2200         }
2201         wmb();
2202         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2203 }
2204
2205 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2206                                           struct net_device *netdev)
2207 {
2208         struct atl1c_adapter *adapter = netdev_priv(netdev);
2209         unsigned long flags;
2210         u16 tpd_req = 1;
2211         struct atl1c_tpd_desc *tpd;
2212         enum atl1c_trans_queue type = atl1c_trans_normal;
2213
2214         if (test_bit(__AT_DOWN, &adapter->flags)) {
2215                 dev_kfree_skb_any(skb);
2216                 return NETDEV_TX_OK;
2217         }
2218
2219         tpd_req = atl1c_cal_tpd_req(skb);
2220         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2221                 if (netif_msg_pktdata(adapter))
2222                         dev_info(&adapter->pdev->dev, "tx locked\n");
2223                 return NETDEV_TX_LOCKED;
2224         }
2225         if (skb->mark == 0x01)
2226                 type = atl1c_trans_high;
2227         else
2228                 type = atl1c_trans_normal;
2229
2230         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2231                 /* no enough descriptor, just stop queue */
2232                 netif_stop_queue(netdev);
2233                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2234                 return NETDEV_TX_BUSY;
2235         }
2236
2237         tpd = atl1c_get_tpd(adapter, type);
2238
2239         /* do TSO and check sum */
2240         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2241                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2242                 dev_kfree_skb_any(skb);
2243                 return NETDEV_TX_OK;
2244         }
2245
2246         if (unlikely(vlan_tx_tag_present(skb))) {
2247                 u16 vlan = vlan_tx_tag_get(skb);
2248                 __le16 tag;
2249
2250                 vlan = cpu_to_le16(vlan);
2251                 AT_VLAN_TO_TAG(vlan, tag);
2252                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2253                 tpd->vlan_tag = tag;
2254         }
2255
2256         if (skb_network_offset(skb) != ETH_HLEN)
2257                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2258
2259         atl1c_tx_map(adapter, skb, tpd, type);
2260         atl1c_tx_queue(adapter, skb, tpd, type);
2261
2262         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2263         return NETDEV_TX_OK;
2264 }
2265
2266 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2267 {
2268         struct net_device *netdev = adapter->netdev;
2269
2270         free_irq(adapter->pdev->irq, netdev);
2271
2272         if (adapter->have_msi)
2273                 pci_disable_msi(adapter->pdev);
2274 }
2275
2276 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2277 {
2278         struct pci_dev    *pdev   = adapter->pdev;
2279         struct net_device *netdev = adapter->netdev;
2280         int flags = 0;
2281         int err = 0;
2282
2283         adapter->have_msi = true;
2284         err = pci_enable_msi(adapter->pdev);
2285         if (err) {
2286                 if (netif_msg_ifup(adapter))
2287                         dev_err(&pdev->dev,
2288                                 "Unable to allocate MSI interrupt Error: %d\n",
2289                                 err);
2290                 adapter->have_msi = false;
2291         } else
2292                 netdev->irq = pdev->irq;
2293
2294         if (!adapter->have_msi)
2295                 flags |= IRQF_SHARED;
2296         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2297                         netdev->name, netdev);
2298         if (err) {
2299                 if (netif_msg_ifup(adapter))
2300                         dev_err(&pdev->dev,
2301                                 "Unable to allocate interrupt Error: %d\n",
2302                                 err);
2303                 if (adapter->have_msi)
2304                         pci_disable_msi(adapter->pdev);
2305                 return err;
2306         }
2307         if (netif_msg_ifup(adapter))
2308                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2309         return err;
2310 }
2311
2312 static int atl1c_up(struct atl1c_adapter *adapter)
2313 {
2314         struct net_device *netdev = adapter->netdev;
2315         int num;
2316         int err;
2317         int i;
2318
2319         netif_carrier_off(netdev);
2320         atl1c_init_ring_ptrs(adapter);
2321         atl1c_set_multi(netdev);
2322         atl1c_restore_vlan(adapter);
2323
2324         for (i = 0; i < adapter->num_rx_queues; i++) {
2325                 num = atl1c_alloc_rx_buffer(adapter, i);
2326                 if (unlikely(num == 0)) {
2327                         err = -ENOMEM;
2328                         goto err_alloc_rx;
2329                 }
2330         }
2331
2332         if (atl1c_configure(adapter)) {
2333                 err = -EIO;
2334                 goto err_up;
2335         }
2336
2337         err = atl1c_request_irq(adapter);
2338         if (unlikely(err))
2339                 goto err_up;
2340
2341         clear_bit(__AT_DOWN, &adapter->flags);
2342         napi_enable(&adapter->napi);
2343         atl1c_irq_enable(adapter);
2344         atl1c_check_link_status(adapter);
2345         netif_start_queue(netdev);
2346         return err;
2347
2348 err_up:
2349 err_alloc_rx:
2350         atl1c_clean_rx_ring(adapter);
2351         return err;
2352 }
2353
2354 static void atl1c_down(struct atl1c_adapter *adapter)
2355 {
2356         struct net_device *netdev = adapter->netdev;
2357
2358         atl1c_del_timer(adapter);
2359         adapter->work_event = 0; /* clear all event */
2360         /* signal that we're down so the interrupt handler does not
2361          * reschedule our watchdog timer */
2362         set_bit(__AT_DOWN, &adapter->flags);
2363         netif_carrier_off(netdev);
2364         napi_disable(&adapter->napi);
2365         atl1c_irq_disable(adapter);
2366         atl1c_free_irq(adapter);
2367         /* reset MAC to disable all RX/TX */
2368         atl1c_reset_mac(&adapter->hw);
2369         msleep(1);
2370
2371         adapter->link_speed = SPEED_0;
2372         adapter->link_duplex = -1;
2373         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2374         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2375         atl1c_clean_rx_ring(adapter);
2376 }
2377
2378 /*
2379  * atl1c_open - Called when a network interface is made active
2380  * @netdev: network interface device structure
2381  *
2382  * Returns 0 on success, negative value on failure
2383  *
2384  * The open entry point is called when a network interface is made
2385  * active by the system (IFF_UP).  At this point all resources needed
2386  * for transmit and receive operations are allocated, the interrupt
2387  * handler is registered with the OS, the watchdog timer is started,
2388  * and the stack is notified that the interface is ready.
2389  */
2390 static int atl1c_open(struct net_device *netdev)
2391 {
2392         struct atl1c_adapter *adapter = netdev_priv(netdev);
2393         int err;
2394
2395         /* disallow open during test */
2396         if (test_bit(__AT_TESTING, &adapter->flags))
2397                 return -EBUSY;
2398
2399         /* allocate rx/tx dma buffer & descriptors */
2400         err = atl1c_setup_ring_resources(adapter);
2401         if (unlikely(err))
2402                 return err;
2403
2404         err = atl1c_up(adapter);
2405         if (unlikely(err))
2406                 goto err_up;
2407
2408         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2409                 u32 phy_data;
2410
2411                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2412                 phy_data |= MDIO_AP_EN;
2413                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2414         }
2415         return 0;
2416
2417 err_up:
2418         atl1c_free_irq(adapter);
2419         atl1c_free_ring_resources(adapter);
2420         atl1c_reset_mac(&adapter->hw);
2421         return err;
2422 }
2423
2424 /*
2425  * atl1c_close - Disables a network interface
2426  * @netdev: network interface device structure
2427  *
2428  * Returns 0, this is not allowed to fail
2429  *
2430  * The close entry point is called when an interface is de-activated
2431  * by the OS.  The hardware is still under the drivers control, but
2432  * needs to be disabled.  A global MAC reset is issued to stop the
2433  * hardware, and all transmit and receive resources are freed.
2434  */
2435 static int atl1c_close(struct net_device *netdev)
2436 {
2437         struct atl1c_adapter *adapter = netdev_priv(netdev);
2438
2439         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2440         atl1c_down(adapter);
2441         atl1c_free_ring_resources(adapter);
2442         return 0;
2443 }
2444
2445 static int atl1c_suspend(struct device *dev)
2446 {
2447         struct pci_dev *pdev = to_pci_dev(dev);
2448         struct net_device *netdev = pci_get_drvdata(pdev);
2449         struct atl1c_adapter *adapter = netdev_priv(netdev);
2450         struct atl1c_hw *hw = &adapter->hw;
2451         u32 mac_ctrl_data = 0;
2452         u32 master_ctrl_data = 0;
2453         u32 wol_ctrl_data = 0;
2454         u16 mii_intr_status_data = 0;
2455         u32 wufc = adapter->wol;
2456
2457         atl1c_disable_l0s_l1(hw);
2458         if (netif_running(netdev)) {
2459                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2460                 atl1c_down(adapter);
2461         }
2462         netif_device_detach(netdev);
2463
2464         if (wufc)
2465                 if (atl1c_phy_power_saving(hw) != 0)
2466                         dev_dbg(&pdev->dev, "phy power saving failed");
2467
2468         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2469         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
2470
2471         master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2472         mac_ctrl_data &= ~(MAC_CTRL_PRMLEN_MASK << MAC_CTRL_PRMLEN_SHIFT);
2473         mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2474                         MAC_CTRL_PRMLEN_MASK) <<
2475                         MAC_CTRL_PRMLEN_SHIFT);
2476         mac_ctrl_data &= ~(MAC_CTRL_SPEED_MASK << MAC_CTRL_SPEED_SHIFT);
2477         mac_ctrl_data &= ~MAC_CTRL_DUPLX;
2478
2479         if (wufc) {
2480                 mac_ctrl_data |= MAC_CTRL_RX_EN;
2481                 if (adapter->link_speed == SPEED_1000 ||
2482                         adapter->link_speed == SPEED_0) {
2483                         mac_ctrl_data |= atl1c_mac_speed_1000 <<
2484                                         MAC_CTRL_SPEED_SHIFT;
2485                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2486                 } else
2487                         mac_ctrl_data |= atl1c_mac_speed_10_100 <<
2488                                         MAC_CTRL_SPEED_SHIFT;
2489
2490                 if (adapter->link_duplex == DUPLEX_FULL)
2491                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2492
2493                 /* turn on magic packet wol */
2494                 if (wufc & AT_WUFC_MAG)
2495                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2496
2497                 if (wufc & AT_WUFC_LNKC) {
2498                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2499                         /* only link up can wake up */
2500                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2501                                 dev_dbg(&pdev->dev, "%s: read write phy "
2502                                                   "register failed.\n",
2503                                                   atl1c_driver_name);
2504                         }
2505                 }
2506                 /* clear phy interrupt */
2507                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2508                 /* Config MAC Ctrl register */
2509                 if (adapter->vlgrp)
2510                         mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
2511
2512                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2513                 if (wufc & AT_WUFC_MAG)
2514                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2515
2516                 dev_dbg(&pdev->dev,
2517                         "%s: suspend MAC=0x%x\n",
2518                         atl1c_driver_name, mac_ctrl_data);
2519                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2520                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2521                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2522
2523                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
2524                         GPHY_CTRL_EXT_RESET);
2525         } else {
2526                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_POWER_SAVING);
2527                 master_ctrl_data |= MASTER_CTRL_CLK_SEL_DIS;
2528                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2529                 mac_ctrl_data |= MAC_CTRL_DUPLX;
2530                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2531                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2532                 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2533                 hw->phy_configured = false; /* re-init PHY when resume */
2534         }
2535
2536         return 0;
2537 }
2538
2539 static int atl1c_resume(struct device *dev)
2540 {
2541         struct pci_dev *pdev = to_pci_dev(dev);
2542         struct net_device *netdev = pci_get_drvdata(pdev);
2543         struct atl1c_adapter *adapter = netdev_priv(netdev);
2544
2545         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2546         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2547                         ATL1C_PCIE_PHY_RESET);
2548
2549         atl1c_phy_reset(&adapter->hw);
2550         atl1c_reset_mac(&adapter->hw);
2551         atl1c_phy_init(&adapter->hw);
2552
2553 #if 0
2554         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2555         pm_data &= ~PM_CTRLSTAT_PME_EN;
2556         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2557 #endif
2558
2559         netif_device_attach(netdev);
2560         if (netif_running(netdev))
2561                 atl1c_up(adapter);
2562
2563         return 0;
2564 }
2565
2566 static void atl1c_shutdown(struct pci_dev *pdev)
2567 {
2568         struct net_device *netdev = pci_get_drvdata(pdev);
2569         struct atl1c_adapter *adapter = netdev_priv(netdev);
2570
2571         atl1c_suspend(&pdev->dev);
2572         pci_wake_from_d3(pdev, adapter->wol);
2573         pci_set_power_state(pdev, PCI_D3hot);
2574 }
2575
2576 static const struct net_device_ops atl1c_netdev_ops = {
2577         .ndo_open               = atl1c_open,
2578         .ndo_stop               = atl1c_close,
2579         .ndo_validate_addr      = eth_validate_addr,
2580         .ndo_start_xmit         = atl1c_xmit_frame,
2581         .ndo_set_mac_address    = atl1c_set_mac_addr,
2582         .ndo_set_multicast_list = atl1c_set_multi,
2583         .ndo_change_mtu         = atl1c_change_mtu,
2584         .ndo_do_ioctl           = atl1c_ioctl,
2585         .ndo_tx_timeout         = atl1c_tx_timeout,
2586         .ndo_get_stats          = atl1c_get_stats,
2587         .ndo_vlan_rx_register   = atl1c_vlan_rx_register,
2588 #ifdef CONFIG_NET_POLL_CONTROLLER
2589         .ndo_poll_controller    = atl1c_netpoll,
2590 #endif
2591 };
2592
2593 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2594 {
2595         SET_NETDEV_DEV(netdev, &pdev->dev);
2596         pci_set_drvdata(pdev, netdev);
2597
2598         netdev->irq  = pdev->irq;
2599         netdev->netdev_ops = &atl1c_netdev_ops;
2600         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2601         atl1c_set_ethtool_ops(netdev);
2602
2603         /* TODO: add when ready */
2604         netdev->features =      NETIF_F_SG         |
2605                                 NETIF_F_HW_CSUM    |
2606                                 NETIF_F_HW_VLAN_TX |
2607                                 NETIF_F_HW_VLAN_RX |
2608                                 NETIF_F_TSO        |
2609                                 NETIF_F_TSO6;
2610         return 0;
2611 }
2612
2613 /*
2614  * atl1c_probe - Device Initialization Routine
2615  * @pdev: PCI device information struct
2616  * @ent: entry in atl1c_pci_tbl
2617  *
2618  * Returns 0 on success, negative on failure
2619  *
2620  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2621  * The OS initialization, configuring of the adapter private structure,
2622  * and a hardware reset occur.
2623  */
2624 static int __devinit atl1c_probe(struct pci_dev *pdev,
2625                                  const struct pci_device_id *ent)
2626 {
2627         struct net_device *netdev;
2628         struct atl1c_adapter *adapter;
2629         static int cards_found;
2630
2631         int err = 0;
2632
2633         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2634         err = pci_enable_device_mem(pdev);
2635         if (err) {
2636                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2637                 return err;
2638         }
2639
2640         /*
2641          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2642          * shared register for the high 32 bits, so only a single, aligned,
2643          * 4 GB physical address range can be used at a time.
2644          *
2645          * Supporting 64-bit DMA on this hardware is more trouble than it's
2646          * worth.  It is far easier to limit to 32-bit DMA than update
2647          * various kernel subsystems to support the mechanics required by a
2648          * fixed-high-32-bit system.
2649          */
2650         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2651             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2652                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2653                 goto err_dma;
2654         }
2655
2656         err = pci_request_regions(pdev, atl1c_driver_name);
2657         if (err) {
2658                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2659                 goto err_pci_reg;
2660         }
2661
2662         pci_set_master(pdev);
2663
2664         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2665         if (netdev == NULL) {
2666                 err = -ENOMEM;
2667                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2668                 goto err_alloc_etherdev;
2669         }
2670
2671         err = atl1c_init_netdev(netdev, pdev);
2672         if (err) {
2673                 dev_err(&pdev->dev, "init netdevice failed\n");
2674                 goto err_init_netdev;
2675         }
2676         adapter = netdev_priv(netdev);
2677         adapter->bd_number = cards_found;
2678         adapter->netdev = netdev;
2679         adapter->pdev = pdev;
2680         adapter->hw.adapter = adapter;
2681         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2682         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2683         if (!adapter->hw.hw_addr) {
2684                 err = -EIO;
2685                 dev_err(&pdev->dev, "cannot map device registers\n");
2686                 goto err_ioremap;
2687         }
2688         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2689
2690         /* init mii data */
2691         adapter->mii.dev = netdev;
2692         adapter->mii.mdio_read  = atl1c_mdio_read;
2693         adapter->mii.mdio_write = atl1c_mdio_write;
2694         adapter->mii.phy_id_mask = 0x1f;
2695         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2696         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2697         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2698                         (unsigned long)adapter);
2699         /* setup the private structure */
2700         err = atl1c_sw_init(adapter);
2701         if (err) {
2702                 dev_err(&pdev->dev, "net device private data init failed\n");
2703                 goto err_sw_init;
2704         }
2705         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2706                         ATL1C_PCIE_PHY_RESET);
2707
2708         /* Init GPHY as early as possible due to power saving issue  */
2709         atl1c_phy_reset(&adapter->hw);
2710
2711         err = atl1c_reset_mac(&adapter->hw);
2712         if (err) {
2713                 err = -EIO;
2714                 goto err_reset;
2715         }
2716
2717         /* reset the controller to
2718          * put the device in a known good starting state */
2719         err = atl1c_phy_init(&adapter->hw);
2720         if (err) {
2721                 err = -EIO;
2722                 goto err_reset;
2723         }
2724         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2725                 err = -EIO;
2726                 dev_err(&pdev->dev, "get mac address failed\n");
2727                 goto err_eeprom;
2728         }
2729         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2730         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2731         if (netif_msg_probe(adapter))
2732                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2733                         adapter->hw.mac_addr);
2734
2735         atl1c_hw_set_mac_addr(&adapter->hw);
2736         INIT_WORK(&adapter->common_task, atl1c_common_task);
2737         adapter->work_event = 0;
2738         err = register_netdev(netdev);
2739         if (err) {
2740                 dev_err(&pdev->dev, "register netdevice failed\n");
2741                 goto err_register;
2742         }
2743
2744         if (netif_msg_probe(adapter))
2745                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2746         cards_found++;
2747         return 0;
2748
2749 err_reset:
2750 err_register:
2751 err_sw_init:
2752 err_eeprom:
2753         iounmap(adapter->hw.hw_addr);
2754 err_init_netdev:
2755 err_ioremap:
2756         free_netdev(netdev);
2757 err_alloc_etherdev:
2758         pci_release_regions(pdev);
2759 err_pci_reg:
2760 err_dma:
2761         pci_disable_device(pdev);
2762         return err;
2763 }
2764
2765 /*
2766  * atl1c_remove - Device Removal Routine
2767  * @pdev: PCI device information struct
2768  *
2769  * atl1c_remove is called by the PCI subsystem to alert the driver
2770  * that it should release a PCI device.  The could be caused by a
2771  * Hot-Plug event, or because the driver is going to be removed from
2772  * memory.
2773  */
2774 static void __devexit atl1c_remove(struct pci_dev *pdev)
2775 {
2776         struct net_device *netdev = pci_get_drvdata(pdev);
2777         struct atl1c_adapter *adapter = netdev_priv(netdev);
2778
2779         unregister_netdev(netdev);
2780         atl1c_phy_disable(&adapter->hw);
2781
2782         iounmap(adapter->hw.hw_addr);
2783
2784         pci_release_regions(pdev);
2785         pci_disable_device(pdev);
2786         free_netdev(netdev);
2787 }
2788
2789 /*
2790  * atl1c_io_error_detected - called when PCI error is detected
2791  * @pdev: Pointer to PCI device
2792  * @state: The current pci connection state
2793  *
2794  * This function is called after a PCI bus error affecting
2795  * this device has been detected.
2796  */
2797 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2798                                                 pci_channel_state_t state)
2799 {
2800         struct net_device *netdev = pci_get_drvdata(pdev);
2801         struct atl1c_adapter *adapter = netdev_priv(netdev);
2802
2803         netif_device_detach(netdev);
2804
2805         if (state == pci_channel_io_perm_failure)
2806                 return PCI_ERS_RESULT_DISCONNECT;
2807
2808         if (netif_running(netdev))
2809                 atl1c_down(adapter);
2810
2811         pci_disable_device(pdev);
2812
2813         /* Request a slot slot reset. */
2814         return PCI_ERS_RESULT_NEED_RESET;
2815 }
2816
2817 /*
2818  * atl1c_io_slot_reset - called after the pci bus has been reset.
2819  * @pdev: Pointer to PCI device
2820  *
2821  * Restart the card from scratch, as if from a cold-boot. Implementation
2822  * resembles the first-half of the e1000_resume routine.
2823  */
2824 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2825 {
2826         struct net_device *netdev = pci_get_drvdata(pdev);
2827         struct atl1c_adapter *adapter = netdev_priv(netdev);
2828
2829         if (pci_enable_device(pdev)) {
2830                 if (netif_msg_hw(adapter))
2831                         dev_err(&pdev->dev,
2832                                 "Cannot re-enable PCI device after reset\n");
2833                 return PCI_ERS_RESULT_DISCONNECT;
2834         }
2835         pci_set_master(pdev);
2836
2837         pci_enable_wake(pdev, PCI_D3hot, 0);
2838         pci_enable_wake(pdev, PCI_D3cold, 0);
2839
2840         atl1c_reset_mac(&adapter->hw);
2841
2842         return PCI_ERS_RESULT_RECOVERED;
2843 }
2844
2845 /*
2846  * atl1c_io_resume - called when traffic can start flowing again.
2847  * @pdev: Pointer to PCI device
2848  *
2849  * This callback is called when the error recovery driver tells us that
2850  * its OK to resume normal operation. Implementation resembles the
2851  * second-half of the atl1c_resume routine.
2852  */
2853 static void atl1c_io_resume(struct pci_dev *pdev)
2854 {
2855         struct net_device *netdev = pci_get_drvdata(pdev);
2856         struct atl1c_adapter *adapter = netdev_priv(netdev);
2857
2858         if (netif_running(netdev)) {
2859                 if (atl1c_up(adapter)) {
2860                         if (netif_msg_hw(adapter))
2861                                 dev_err(&pdev->dev,
2862                                         "Cannot bring device back up after reset\n");
2863                         return;
2864                 }
2865         }
2866
2867         netif_device_attach(netdev);
2868 }
2869
2870 static struct pci_error_handlers atl1c_err_handler = {
2871         .error_detected = atl1c_io_error_detected,
2872         .slot_reset = atl1c_io_slot_reset,
2873         .resume = atl1c_io_resume,
2874 };
2875
2876 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2877
2878 static struct pci_driver atl1c_driver = {
2879         .name     = atl1c_driver_name,
2880         .id_table = atl1c_pci_tbl,
2881         .probe    = atl1c_probe,
2882         .remove   = __devexit_p(atl1c_remove),
2883         .shutdown = atl1c_shutdown,
2884         .err_handler = &atl1c_err_handler,
2885         .driver.pm = &atl1c_pm_ops,
2886 };
2887
2888 /*
2889  * atl1c_init_module - Driver Registration Routine
2890  *
2891  * atl1c_init_module is the first routine called when the driver is
2892  * loaded. All it does is register with the PCI subsystem.
2893  */
2894 static int __init atl1c_init_module(void)
2895 {
2896         return pci_register_driver(&atl1c_driver);
2897 }
2898
2899 /*
2900  * atl1c_exit_module - Driver Exit Cleanup Routine
2901  *
2902  * atl1c_exit_module is called just before the driver is removed
2903  * from memory.
2904  */
2905 static void __exit atl1c_exit_module(void)
2906 {
2907         pci_unregister_driver(&atl1c_driver);
2908 }
2909
2910 module_init(atl1c_init_module);
2911 module_exit(atl1c_exit_module);