drivers/net/ethernet/atheros/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 "1.0.1.1-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27
  28 /*
  29  * atl1c_pci_tbl - PCI Device ID Table
  30  *
  31  * Wildcard entries (PCI_ANY_ID) should come last
  32  * Last entry must be all 0s
  33  *
  34  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  35  *   Class, Class Mask, private data (not used) }
  36  */
  37 static const struct pci_device_id atl1c_pci_tbl[] = {
  38         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  41         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  42         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  43         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  44         /* required last entry */
  45         { 0 }
  46 };
  47 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  48
  49 MODULE_AUTHOR("Jie Yang");
  50 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
  51 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
  52 MODULE_LICENSE("GPL");
  53 MODULE_VERSION(ATL1C_DRV_VERSION);
  54
  55 static int atl1c_stop_mac(struct atl1c_hw *hw);
  56 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  57 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
  58 static void atl1c_start_mac(struct atl1c_adapter *adapter);
  59 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
  60                    int *work_done, int work_to_do);
  61 static int atl1c_up(struct atl1c_adapter *adapter);
  62 static void atl1c_down(struct atl1c_adapter *adapter);
  63 static int atl1c_reset_mac(struct atl1c_hw *hw);
  64 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
  65 static int atl1c_configure(struct atl1c_adapter *adapter);
  66 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
  67
  68
  69 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  70         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  71 static void atl1c_pcie_patch(struct atl1c_hw *hw)
  72 {
  73         u32 mst_data, data;
  74
  75         /* pclk sel could switch to 25M */
  76         AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
  77         mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
  78         AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
  79
  80         /* WoL/PCIE related settings */
  81         if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
  82                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
  83                 data |= PCIE_PHYMISC_FORCE_RCV_DET;
  84                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
  85         } else { /* new dev set bit5 of MASTER */
  86                 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
  87                         AT_WRITE_REG(hw, REG_MASTER_CTRL,
  88                                 mst_data | MASTER_CTRL_WAKEN_25M);
  89         }
  90         /* aspm/PCIE setting only for l2cb 1.0 */
  91         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
  92                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
  93                 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
  94                         L2CB1_PCIE_PHYMISC2_CDR_BW);
  95                 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
  96                         L2CB1_PCIE_PHYMISC2_L0S_TH);
  97                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
  98                 /* extend L1 sync timer */
  99                 AT_READ_REG(hw, REG_LINK_CTRL, &data);
 100                 data |= LINK_CTRL_EXT_SYNC;
 101                 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
 102         }
 103         /* l2cb 1.x & l1d 1.x */
 104         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
 105                 AT_READ_REG(hw, REG_PM_CTRL, &data);
 106                 data |= PM_CTRL_L0S_BUFSRX_EN;
 107                 AT_WRITE_REG(hw, REG_PM_CTRL, data);
 108                 /* clear vendor msg */
 109                 AT_READ_REG(hw, REG_DMA_DBG, &data);
 110                 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
 111         }
 112 }
 113
 114 /* FIXME: no need any more ? */
 115 /*
 116  * atl1c_init_pcie - init PCIE module
 117  */
 118 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 119 {
 120         u32 data;
 121         u32 pci_cmd;
 122         struct pci_dev *pdev = hw->adapter->pdev;
 123         int pos;
 124
 125         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 126         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 127         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 128                 PCI_COMMAND_IO);
 129         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 130
 131         /*
 132          * Clear any PowerSaveing Settings
 133          */
 134         pci_enable_wake(pdev, PCI_D3hot, 0);
 135         pci_enable_wake(pdev, PCI_D3cold, 0);
 136         /* wol sts read-clear */
 137         AT_READ_REG(hw, REG_WOL_CTRL, &data);
 138         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
 139
 140         /*
 141          * Mask some pcie error bits
 142          */
 143         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 144         if (pos) {
 145                 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
 146                 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
 147                 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
 148         }
 149         /* clear error status */
 150         pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
 151                         PCI_EXP_DEVSTA_NFED |
 152                         PCI_EXP_DEVSTA_FED |
 153                         PCI_EXP_DEVSTA_CED |
 154                         PCI_EXP_DEVSTA_URD);
 155
 156         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 157         data &= ~LTSSM_ID_EN_WRO;
 158         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 159
 160         atl1c_pcie_patch(hw);
 161         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 162                 atl1c_disable_l0s_l1(hw);
 163
 164         msleep(5);
 165 }
 166
 167 /**
 168  * atl1c_irq_enable - Enable default interrupt generation settings
 169  * @adapter: board private structure
 170  */
 171 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 172 {
 173         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 174                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 175                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 176                 AT_WRITE_FLUSH(&adapter->hw);
 177         }
 178 }
 179
 180 /**
 181  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 182  * @adapter: board private structure
 183  */
 184 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 185 {
 186         atomic_inc(&adapter->irq_sem);
 187         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 188         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 189         AT_WRITE_FLUSH(&adapter->hw);
 190         synchronize_irq(adapter->pdev->irq);
 191 }
 192
 193 /**
 194  * atl1c_irq_reset - reset interrupt confiure on the NIC
 195  * @adapter: board private structure
 196  */
 197 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 198 {
 199         atomic_set(&adapter->irq_sem, 1);
 200         atl1c_irq_enable(adapter);
 201 }
 202
 203 /*
 204  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 205  * of the idle status register until the device is actually idle
 206  */
 207 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
 208 {
 209         int timeout;
 210         u32 data;
 211
 212         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 213                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 214                 if ((data & modu_ctrl) == 0)
 215                         return 0;
 216                 msleep(1);
 217         }
 218         return data;
 219 }
 220
 221 /**
 222  * atl1c_phy_config - Timer Call-back
 223  * @data: pointer to netdev cast into an unsigned long
 224  */
 225 static void atl1c_phy_config(struct timer_list *t)
 226 {
 227         struct atl1c_adapter *adapter = from_timer(adapter, t,
 228                                                    phy_config_timer);
 229         struct atl1c_hw *hw = &adapter->hw;
 230         unsigned long flags;
 231
 232         spin_lock_irqsave(&adapter->mdio_lock, flags);
 233         atl1c_restart_autoneg(hw);
 234         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 235 }
 236
 237 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 238 {
 239         WARN_ON(in_interrupt());
 240         atl1c_down(adapter);
 241         atl1c_up(adapter);
 242         clear_bit(__AT_RESETTING, &adapter->flags);
 243 }
 244
 245 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 246 {
 247         struct atl1c_hw *hw = &adapter->hw;
 248         struct net_device *netdev = adapter->netdev;
 249         struct pci_dev    *pdev   = adapter->pdev;
 250         int err;
 251         unsigned long flags;
 252         u16 speed, duplex, phy_data;
 253
 254         spin_lock_irqsave(&adapter->mdio_lock, flags);
 255         /* MII_BMSR must read twise */
 256         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 257         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 258         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 259
 260         if ((phy_data & BMSR_LSTATUS) == 0) {
 261                 /* link down */
 262                 netif_carrier_off(netdev);
 263                 hw->hibernate = true;
 264                 if (atl1c_reset_mac(hw) != 0)
 265                         if (netif_msg_hw(adapter))
 266                                 dev_warn(&pdev->dev, "reset mac failed\n");
 267                 atl1c_set_aspm(hw, SPEED_0);
 268                 atl1c_post_phy_linkchg(hw, SPEED_0);
 269                 atl1c_reset_dma_ring(adapter);
 270                 atl1c_configure(adapter);
 271         } else {
 272                 /* Link Up */
 273                 hw->hibernate = false;
 274                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 275                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 276                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 277                 if (unlikely(err))
 278                         return;
 279                 /* link result is our setting */
 280                 if (adapter->link_speed != speed ||
 281                     adapter->link_duplex != duplex) {
 282                         adapter->link_speed  = speed;
 283                         adapter->link_duplex = duplex;
 284                         atl1c_set_aspm(hw, speed);
 285                         atl1c_post_phy_linkchg(hw, speed);
 286                         atl1c_start_mac(adapter);
 287                         if (netif_msg_link(adapter))
 288                                 dev_info(&pdev->dev,
 289                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 290                                         atl1c_driver_name, netdev->name,
 291                                         adapter->link_speed,
 292                                         adapter->link_duplex == FULL_DUPLEX ?
 293                                         "Full Duplex" : "Half Duplex");
 294                 }
 295                 if (!netif_carrier_ok(netdev))
 296                         netif_carrier_on(netdev);
 297         }
 298 }
 299
 300 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 301 {
 302         struct net_device *netdev = adapter->netdev;
 303         struct pci_dev    *pdev   = adapter->pdev;
 304         u16 phy_data;
 305         u16 link_up;
 306
 307         spin_lock(&adapter->mdio_lock);
 308         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 309         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 310         spin_unlock(&adapter->mdio_lock);
 311         link_up = phy_data & BMSR_LSTATUS;
 312         /* notify upper layer link down ASAP */
 313         if (!link_up) {
 314                 if (netif_carrier_ok(netdev)) {
 315                         /* old link state: Up */
 316                         netif_carrier_off(netdev);
 317                         if (netif_msg_link(adapter))
 318                                 dev_info(&pdev->dev,
 319                                         "%s: %s NIC Link is Down\n",
 320                                         atl1c_driver_name, netdev->name);
 321                         adapter->link_speed = SPEED_0;
 322                 }
 323         }
 324
 325         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 326         schedule_work(&adapter->common_task);
 327 }
 328
 329 static void atl1c_common_task(struct work_struct *work)
 330 {
 331         struct atl1c_adapter *adapter;
 332         struct net_device *netdev;
 333
 334         adapter = container_of(work, struct atl1c_adapter, common_task);
 335         netdev = adapter->netdev;
 336
 337         if (test_bit(__AT_DOWN, &adapter->flags))
 338                 return;
 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_irq_disable(adapter);
 350                 atl1c_check_link_status(adapter);
 351                 atl1c_irq_enable(adapter);
 352         }
 353 }
 354
 355
 356 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 357 {
 358         del_timer_sync(&adapter->phy_config_timer);
 359 }
 360
 361
 362 /**
 363  * atl1c_tx_timeout - Respond to a Tx Hang
 364  * @netdev: network interface device structure
 365  */
 366 static void atl1c_tx_timeout(struct net_device *netdev)
 367 {
 368         struct atl1c_adapter *adapter = netdev_priv(netdev);
 369
 370         /* Do the reset outside of interrupt context */
 371         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 372         schedule_work(&adapter->common_task);
 373 }
 374
 375 /**
 376  * atl1c_set_multi - Multicast and Promiscuous mode set
 377  * @netdev: network interface device structure
 378  *
 379  * The set_multi entry point is called whenever the multicast address
 380  * list or the network interface flags are updated.  This routine is
 381  * responsible for configuring the hardware for proper multicast,
 382  * promiscuous mode, and all-multi behavior.
 383  */
 384 static void atl1c_set_multi(struct net_device *netdev)
 385 {
 386         struct atl1c_adapter *adapter = netdev_priv(netdev);
 387         struct atl1c_hw *hw = &adapter->hw;
 388         struct netdev_hw_addr *ha;
 389         u32 mac_ctrl_data;
 390         u32 hash_value;
 391
 392         /* Check for Promiscuous and All Multicast modes */
 393         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 394
 395         if (netdev->flags & IFF_PROMISC) {
 396                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 397         } else if (netdev->flags & IFF_ALLMULTI) {
 398                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 399                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 400         } else {
 401                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 402         }
 403
 404         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 405
 406         /* clear the old settings from the multicast hash table */
 407         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 408         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 409
 410         /* comoute mc addresses' hash value ,and put it into hash table */
 411         netdev_for_each_mc_addr(ha, netdev) {
 412                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 413                 atl1c_hash_set(hw, hash_value);
 414         }
 415 }
 416
 417 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 418 {
 419         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 420                 /* enable VLAN tag insert/strip */
 421                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 422         } else {
 423                 /* disable VLAN tag insert/strip */
 424                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 425         }
 426 }
 427
 428 static void atl1c_vlan_mode(struct net_device *netdev,
 429         netdev_features_t features)
 430 {
 431         struct atl1c_adapter *adapter = netdev_priv(netdev);
 432         struct pci_dev *pdev = adapter->pdev;
 433         u32 mac_ctrl_data = 0;
 434
 435         if (netif_msg_pktdata(adapter))
 436                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 437
 438         atl1c_irq_disable(adapter);
 439         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 440         __atl1c_vlan_mode(features, &mac_ctrl_data);
 441         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 442         atl1c_irq_enable(adapter);
 443 }
 444
 445 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 446 {
 447         struct pci_dev *pdev = adapter->pdev;
 448
 449         if (netif_msg_pktdata(adapter))
 450                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 451         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 452 }
 453
 454 /**
 455  * atl1c_set_mac - Change the Ethernet Address of the NIC
 456  * @netdev: network interface device structure
 457  * @p: pointer to an address structure
 458  *
 459  * Returns 0 on success, negative on failure
 460  */
 461 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 462 {
 463         struct atl1c_adapter *adapter = netdev_priv(netdev);
 464         struct sockaddr *addr = p;
 465
 466         if (!is_valid_ether_addr(addr->sa_data))
 467                 return -EADDRNOTAVAIL;
 468
 469         if (netif_running(netdev))
 470                 return -EBUSY;
 471
 472         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 473         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 474
 475         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
 476
 477         return 0;
 478 }
 479
 480 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 481                                 struct net_device *dev)
 482 {
 483         unsigned int head_size;
 484         int mtu = dev->mtu;
 485
 486         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 487                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 488
 489         head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) +
 490                     SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 491         adapter->rx_frag_size = roundup_pow_of_two(head_size);
 492 }
 493
 494 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 495         netdev_features_t features)
 496 {
 497         /*
 498          * Since there is no support for separate rx/tx vlan accel
 499          * enable/disable make sure tx flag is always in same state as rx.
 500          */
 501         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 502                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 503         else
 504                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 505
 506         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 507                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 508
 509         return features;
 510 }
 511
 512 static int atl1c_set_features(struct net_device *netdev,
 513         netdev_features_t features)
 514 {
 515         netdev_features_t changed = netdev->features ^ features;
 516
 517         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 518                 atl1c_vlan_mode(netdev, features);
 519
 520         return 0;
 521 }
 522
 523 static void atl1c_set_max_mtu(struct net_device *netdev)
 524 {
 525         struct atl1c_adapter *adapter = netdev_priv(netdev);
 526         struct atl1c_hw *hw = &adapter->hw;
 527
 528         switch (hw->nic_type) {
 529         /* These (GbE) devices support jumbo packets, max_mtu 6122 */
 530         case athr_l1c:
 531         case athr_l1d:
 532         case athr_l1d_2:
 533                 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
 534                                   (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
 535                 break;
 536         /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */
 537         default:
 538                 netdev->max_mtu = ETH_DATA_LEN;
 539                 break;
 540         }
 541 }
 542
 543 /**
 544  * atl1c_change_mtu - Change the Maximum Transfer Unit
 545  * @netdev: network interface device structure
 546  * @new_mtu: new value for maximum frame size
 547  *
 548  * Returns 0 on success, negative on failure
 549  */
 550 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 551 {
 552         struct atl1c_adapter *adapter = netdev_priv(netdev);
 553
 554         /* set MTU */
 555         if (netif_running(netdev)) {
 556                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 557                         msleep(1);
 558                 netdev->mtu = new_mtu;
 559                 adapter->hw.max_frame_size = new_mtu;
 560                 atl1c_set_rxbufsize(adapter, netdev);
 561                 atl1c_down(adapter);
 562                 netdev_update_features(netdev);
 563                 atl1c_up(adapter);
 564                 clear_bit(__AT_RESETTING, &adapter->flags);
 565         }
 566         return 0;
 567 }
 568
 569 /*
 570  *  caller should hold mdio_lock
 571  */
 572 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 573 {
 574         struct atl1c_adapter *adapter = netdev_priv(netdev);
 575         u16 result;
 576
 577         atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
 578         return result;
 579 }
 580
 581 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 582                              int reg_num, int val)
 583 {
 584         struct atl1c_adapter *adapter = netdev_priv(netdev);
 585
 586         atl1c_write_phy_reg(&adapter->hw, reg_num, val);
 587 }
 588
 589 static int atl1c_mii_ioctl(struct net_device *netdev,
 590                            struct ifreq *ifr, int cmd)
 591 {
 592         struct atl1c_adapter *adapter = netdev_priv(netdev);
 593         struct pci_dev *pdev = adapter->pdev;
 594         struct mii_ioctl_data *data = if_mii(ifr);
 595         unsigned long flags;
 596         int retval = 0;
 597
 598         if (!netif_running(netdev))
 599                 return -EINVAL;
 600
 601         spin_lock_irqsave(&adapter->mdio_lock, flags);
 602         switch (cmd) {
 603         case SIOCGMIIPHY:
 604                 data->phy_id = 0;
 605                 break;
 606
 607         case SIOCGMIIREG:
 608                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 609                                     &data->val_out)) {
 610                         retval = -EIO;
 611                         goto out;
 612                 }
 613                 break;
 614
 615         case SIOCSMIIREG:
 616                 if (data->reg_num & ~(0x1F)) {
 617                         retval = -EFAULT;
 618                         goto out;
 619                 }
 620
 621                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 622                                 data->reg_num, data->val_in);
 623                 if (atl1c_write_phy_reg(&adapter->hw,
 624                                      data->reg_num, data->val_in)) {
 625                         retval = -EIO;
 626                         goto out;
 627                 }
 628                 break;
 629
 630         default:
 631                 retval = -EOPNOTSUPP;
 632                 break;
 633         }
 634 out:
 635         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 636         return retval;
 637 }
 638
 639 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 640 {
 641         switch (cmd) {
 642         case SIOCGMIIPHY:
 643         case SIOCGMIIREG:
 644         case SIOCSMIIREG:
 645                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 646         default:
 647                 return -EOPNOTSUPP;
 648         }
 649 }
 650
 651 /**
 652  * atl1c_alloc_queues - Allocate memory for all rings
 653  * @adapter: board private structure to initialize
 654  *
 655  */
 656 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
 657 {
 658         return 0;
 659 }
 660
 661 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 662 {
 663         switch (hw->device_id) {
 664         case PCI_DEVICE_ID_ATTANSIC_L2C:
 665                 hw->nic_type = athr_l2c;
 666                 break;
 667         case PCI_DEVICE_ID_ATTANSIC_L1C:
 668                 hw->nic_type = athr_l1c;
 669                 break;
 670         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 671                 hw->nic_type = athr_l2c_b;
 672                 break;
 673         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 674                 hw->nic_type = athr_l2c_b2;
 675                 break;
 676         case PCI_DEVICE_ID_ATHEROS_L1D:
 677                 hw->nic_type = athr_l1d;
 678                 break;
 679         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 680                 hw->nic_type = athr_l1d_2;
 681                 break;
 682         default:
 683                 break;
 684         }
 685 }
 686
 687 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 688 {
 689         u32 link_ctrl_data;
 690
 691         atl1c_set_mac_type(hw);
 692         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 693
 694         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 695                          ATL1C_TXQ_MODE_ENHANCE;
 696         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 697                           ATL1C_ASPM_L1_SUPPORT;
 698         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 699
 700         if (hw->nic_type == athr_l1c ||
 701             hw->nic_type == athr_l1d ||
 702             hw->nic_type == athr_l1d_2)
 703                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 704         return 0;
 705 }
 706
 707 struct atl1c_platform_patch {
 708         u16 pci_did;
 709         u8  pci_revid;
 710         u16 subsystem_vid;
 711         u16 subsystem_did;
 712         u32 patch_flag;
 713 #define ATL1C_LINK_PATCH        0x1
 714 };
 715 static const struct atl1c_platform_patch plats[] = {
 716 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
 717 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
 718 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
 719 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
 720 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
 721 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
 722 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
 723 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
 724 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
 725 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
 726 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
 727 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
 728 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
 729 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
 730 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
 731 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
 732 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
 733 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
 734 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
 735 {0},
 736 };
 737
 738 static void atl1c_patch_assign(struct atl1c_hw *hw)
 739 {
 740         struct pci_dev  *pdev = hw->adapter->pdev;
 741         u32 misc_ctrl;
 742         int i = 0;
 743
 744         hw->msi_lnkpatch = false;
 745
 746         while (plats[i].pci_did != 0) {
 747                 if (plats[i].pci_did == hw->device_id &&
 748                     plats[i].pci_revid == hw->revision_id &&
 749                     plats[i].subsystem_vid == hw->subsystem_vendor_id &&
 750                     plats[i].subsystem_did == hw->subsystem_id) {
 751                         if (plats[i].patch_flag & ATL1C_LINK_PATCH)
 752                                 hw->msi_lnkpatch = true;
 753                 }
 754                 i++;
 755         }
 756
 757         if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
 758             hw->revision_id == L2CB_V21) {
 759                 /* config access mode */
 760                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 761                                        REG_PCIE_DEV_MISC_CTRL);
 762                 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
 763                 misc_ctrl &= ~0x100;
 764                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 765                                        REG_PCIE_DEV_MISC_CTRL);
 766                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
 767         }
 768 }
 769 /**
 770  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 771  * @adapter: board private structure to initialize
 772  *
 773  * atl1c_sw_init initializes the Adapter private data structure.
 774  * Fields are initialized based on PCI device information and
 775  * OS network device settings (MTU size).
 776  */
 777 static int atl1c_sw_init(struct atl1c_adapter *adapter)
 778 {
 779         struct atl1c_hw *hw   = &adapter->hw;
 780         struct pci_dev  *pdev = adapter->pdev;
 781         u32 revision;
 782
 783
 784         adapter->wol = 0;
 785         device_set_wakeup_enable(&pdev->dev, false);
 786         adapter->link_speed = SPEED_0;
 787         adapter->link_duplex = FULL_DUPLEX;
 788         adapter->tpd_ring[0].count = 1024;
 789         adapter->rfd_ring.count = 512;
 790
 791         hw->vendor_id = pdev->vendor;
 792         hw->device_id = pdev->device;
 793         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 794         hw->subsystem_id = pdev->subsystem_device;
 795         pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
 796         hw->revision_id = revision & 0xFF;
 797         /* before link up, we assume hibernate is true */
 798         hw->hibernate = true;
 799         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 800         if (atl1c_setup_mac_funcs(hw) != 0) {
 801                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 802                 return -1;
 803         }
 804         atl1c_patch_assign(hw);
 805
 806         hw->intr_mask = IMR_NORMAL_MASK;
 807         hw->phy_configured = false;
 808         hw->preamble_len = 7;
 809         hw->max_frame_size = adapter->netdev->mtu;
 810         hw->autoneg_advertised = ADVERTISED_Autoneg;
 811         hw->indirect_tab = 0xE4E4E4E4;
 812         hw->base_cpu = 0;
 813
 814         hw->ict = 50000;                /* 100ms */
 815         hw->smb_timer = 200000;         /* 400ms */
 816         hw->rx_imt = 200;
 817         hw->tx_imt = 1000;
 818
 819         hw->tpd_burst = 5;
 820         hw->rfd_burst = 8;
 821         hw->dma_order = atl1c_dma_ord_out;
 822         hw->dmar_block = atl1c_dma_req_1024;
 823
 824         if (atl1c_alloc_queues(adapter)) {
 825                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 826                 return -ENOMEM;
 827         }
 828         /* TODO */
 829         atl1c_set_rxbufsize(adapter, adapter->netdev);
 830         atomic_set(&adapter->irq_sem, 1);
 831         spin_lock_init(&adapter->mdio_lock);
 832         set_bit(__AT_DOWN, &adapter->flags);
 833
 834         return 0;
 835 }
 836
 837 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 838                                 struct atl1c_buffer *buffer_info)
 839 {
 840         u16 pci_driection;
 841         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 842                 return;
 843         if (buffer_info->dma) {
 844                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 845                         pci_driection = PCI_DMA_FROMDEVICE;
 846                 else
 847                         pci_driection = PCI_DMA_TODEVICE;
 848
 849                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 850                         pci_unmap_single(pdev, buffer_info->dma,
 851                                         buffer_info->length, pci_driection);
 852                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 853                         pci_unmap_page(pdev, buffer_info->dma,
 854                                         buffer_info->length, pci_driection);
 855         }
 856         if (buffer_info->skb)
 857                 dev_consume_skb_any(buffer_info->skb);
 858         buffer_info->dma = 0;
 859         buffer_info->skb = NULL;
 860         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 861 }
 862 /**
 863  * atl1c_clean_tx_ring - Free Tx-skb
 864  * @adapter: board private structure
 865  */
 866 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 867                                 enum atl1c_trans_queue type)
 868 {
 869         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 870         struct atl1c_buffer *buffer_info;
 871         struct pci_dev *pdev = adapter->pdev;
 872         u16 index, ring_count;
 873
 874         ring_count = tpd_ring->count;
 875         for (index = 0; index < ring_count; index++) {
 876                 buffer_info = &tpd_ring->buffer_info[index];
 877                 atl1c_clean_buffer(pdev, buffer_info);
 878         }
 879
 880         netdev_reset_queue(adapter->netdev);
 881
 882         /* Zero out Tx-buffers */
 883         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 884                 ring_count);
 885         atomic_set(&tpd_ring->next_to_clean, 0);
 886         tpd_ring->next_to_use = 0;
 887 }
 888
 889 /**
 890  * atl1c_clean_rx_ring - Free rx-reservation skbs
 891  * @adapter: board private structure
 892  */
 893 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 894 {
 895         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 896         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 897         struct atl1c_buffer *buffer_info;
 898         struct pci_dev *pdev = adapter->pdev;
 899         int j;
 900
 901         for (j = 0; j < rfd_ring->count; j++) {
 902                 buffer_info = &rfd_ring->buffer_info[j];
 903                 atl1c_clean_buffer(pdev, buffer_info);
 904         }
 905         /* zero out the descriptor ring */
 906         memset(rfd_ring->desc, 0, rfd_ring->size);
 907         rfd_ring->next_to_clean = 0;
 908         rfd_ring->next_to_use = 0;
 909         rrd_ring->next_to_use = 0;
 910         rrd_ring->next_to_clean = 0;
 911 }
 912
 913 /*
 914  * Read / Write Ptr Initialize:
 915  */
 916 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 917 {
 918         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 919         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 920         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 921         struct atl1c_buffer *buffer_info;
 922         int i, j;
 923
 924         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 925                 tpd_ring[i].next_to_use = 0;
 926                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 927                 buffer_info = tpd_ring[i].buffer_info;
 928                 for (j = 0; j < tpd_ring->count; j++)
 929                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 930                                         ATL1C_BUFFER_FREE);
 931         }
 932         rfd_ring->next_to_use = 0;
 933         rfd_ring->next_to_clean = 0;
 934         rrd_ring->next_to_use = 0;
 935         rrd_ring->next_to_clean = 0;
 936         for (j = 0; j < rfd_ring->count; j++) {
 937                 buffer_info = &rfd_ring->buffer_info[j];
 938                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 939         }
 940 }
 941
 942 /**
 943  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 944  * @adapter: board private structure
 945  *
 946  * Free all transmit software resources
 947  */
 948 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 949 {
 950         struct pci_dev *pdev = adapter->pdev;
 951
 952         pci_free_consistent(pdev, adapter->ring_header.size,
 953                                         adapter->ring_header.desc,
 954                                         adapter->ring_header.dma);
 955         adapter->ring_header.desc = NULL;
 956
 957         /* Note: just free tdp_ring.buffer_info,
 958         *  it contain rfd_ring.buffer_info, do not double free */
 959         if (adapter->tpd_ring[0].buffer_info) {
 960                 kfree(adapter->tpd_ring[0].buffer_info);
 961                 adapter->tpd_ring[0].buffer_info = NULL;
 962         }
 963         if (adapter->rx_page) {
 964                 put_page(adapter->rx_page);
 965                 adapter->rx_page = NULL;
 966         }
 967 }
 968
 969 /**
 970  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 971  * @adapter: board private structure
 972  *
 973  * Return 0 on success, negative on failure
 974  */
 975 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 976 {
 977         struct pci_dev *pdev = adapter->pdev;
 978         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 979         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 980         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 981         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 982         int size;
 983         int i;
 984         int count = 0;
 985         int rx_desc_count = 0;
 986         u32 offset = 0;
 987
 988         rrd_ring->count = rfd_ring->count;
 989         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 990                 tpd_ring[i].count = tpd_ring[0].count;
 991
 992         /* 2 tpd queue, one high priority queue,
 993          * another normal priority queue */
 994         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 995                 rfd_ring->count);
 996         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 997         if (unlikely(!tpd_ring->buffer_info))
 998                 goto err_nomem;
 999
1000         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1001                 tpd_ring[i].buffer_info =
1002                         (tpd_ring->buffer_info + count);
1003                 count += tpd_ring[i].count;
1004         }
1005
1006         rfd_ring->buffer_info =
1007                 (tpd_ring->buffer_info + count);
1008         count += rfd_ring->count;
1009         rx_desc_count += rfd_ring->count;
1010
1011         /*
1012          * real ring DMA buffer
1013          * each ring/block may need up to 8 bytes for alignment, hence the
1014          * additional bytes tacked onto the end.
1015          */
1016         ring_header->size = size =
1017                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1018                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1019                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1020                 8 * 4;
1021
1022         ring_header->desc = dma_zalloc_coherent(&pdev->dev, ring_header->size,
1023                                                 &ring_header->dma, GFP_KERNEL);
1024         if (unlikely(!ring_header->desc)) {
1025                 dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
1026                 goto err_nomem;
1027         }
1028         /* init TPD ring */
1029
1030         tpd_ring[0].dma = roundup(ring_header->dma, 8);
1031         offset = tpd_ring[0].dma - ring_header->dma;
1032         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1033                 tpd_ring[i].dma = ring_header->dma + offset;
1034                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1035                 tpd_ring[i].size =
1036                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1037                 offset += roundup(tpd_ring[i].size, 8);
1038         }
1039         /* init RFD ring */
1040         rfd_ring->dma = ring_header->dma + offset;
1041         rfd_ring->desc = (u8 *) ring_header->desc + offset;
1042         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1043         offset += roundup(rfd_ring->size, 8);
1044
1045         /* init RRD ring */
1046         rrd_ring->dma = ring_header->dma + offset;
1047         rrd_ring->desc = (u8 *) ring_header->desc + offset;
1048         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1049                 rrd_ring->count;
1050         offset += roundup(rrd_ring->size, 8);
1051
1052         return 0;
1053
1054 err_nomem:
1055         kfree(tpd_ring->buffer_info);
1056         return -ENOMEM;
1057 }
1058
1059 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1060 {
1061         struct atl1c_hw *hw = &adapter->hw;
1062         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1063         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1064         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1065                                 adapter->tpd_ring;
1066
1067         /* TPD */
1068         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1069                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1070                                 AT_DMA_HI_ADDR_MASK) >> 32));
1071         /* just enable normal priority TX queue */
1072         AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1073                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1074                                 AT_DMA_LO_ADDR_MASK));
1075         AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1076                         (u32)(tpd_ring[atl1c_trans_high].dma &
1077                                 AT_DMA_LO_ADDR_MASK));
1078         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1079                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1080
1081
1082         /* RFD */
1083         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1084                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1085         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1086                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1087
1088         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1089                         rfd_ring->count & RFD_RING_SIZE_MASK);
1090         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1091                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1092
1093         /* RRD */
1094         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1095                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1096         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1097                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1098
1099         if (hw->nic_type == athr_l2c_b) {
1100                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1101                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1102                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1103                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1104                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1105                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1106                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1107                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1108         }
1109         /* Load all of base address above */
1110         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1111 }
1112
1113 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1114 {
1115         struct atl1c_hw *hw = &adapter->hw;
1116         int max_pay_load;
1117         u16 tx_offload_thresh;
1118         u32 txq_ctrl_data;
1119
1120         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1121         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1122                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1123         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1124         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1125         /*
1126          * if BIOS had changed the dam-read-max-length to an invalid value,
1127          * restore it to default value
1128          */
1129         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1130                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1131                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1132         }
1133         txq_ctrl_data =
1134                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1135                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1136
1137         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1138 }
1139
1140 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1141 {
1142         struct atl1c_hw *hw = &adapter->hw;
1143         u32 rxq_ctrl_data;
1144
1145         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1146                         RXQ_RFD_BURST_NUM_SHIFT;
1147
1148         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1149                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1150
1151         /* aspm for gigabit */
1152         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1153                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1154                         ASPM_THRUPUT_LIMIT_100M);
1155
1156         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
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 = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1165                 DMA_CTRL_RREQ_PRI_DATA |
1166                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1167                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1168                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1169
1170         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1171 }
1172
1173 /*
1174  * Stop the mac, transmit and receive units
1175  * hw - Struct containing variables accessed by shared code
1176  * return : 0  or  idle status (if error)
1177  */
1178 static int atl1c_stop_mac(struct atl1c_hw *hw)
1179 {
1180         u32 data;
1181
1182         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1183         data &= ~RXQ_CTRL_EN;
1184         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1185
1186         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1187         data &= ~TXQ_CTRL_EN;
1188         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1189
1190         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1191
1192         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1193         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1194         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1195
1196         return (int)atl1c_wait_until_idle(hw,
1197                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1198 }
1199
1200 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1201 {
1202         struct atl1c_hw *hw = &adapter->hw;
1203         u32 mac, txq, rxq;
1204
1205         hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1206         hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1207                 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1208
1209         AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1210         AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1211         AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1212
1213         txq |= TXQ_CTRL_EN;
1214         rxq |= RXQ_CTRL_EN;
1215         mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1216                MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1217                MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1218                MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1219                MAC_CTRL_HASH_ALG_CRC32;
1220         if (hw->mac_duplex)
1221                 mac |= MAC_CTRL_DUPLX;
1222         else
1223                 mac &= ~MAC_CTRL_DUPLX;
1224         mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1225         mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1226
1227         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1228         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1229         AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1230 }
1231
1232 /*
1233  * Reset the transmit and receive units; mask and clear all interrupts.
1234  * hw - Struct containing variables accessed by shared code
1235  * return : 0  or  idle status (if error)
1236  */
1237 static int atl1c_reset_mac(struct atl1c_hw *hw)
1238 {
1239         struct atl1c_adapter *adapter = hw->adapter;
1240         struct pci_dev *pdev = adapter->pdev;
1241         u32 ctrl_data = 0;
1242
1243         atl1c_stop_mac(hw);
1244         /*
1245          * Issue Soft Reset to the MAC.  This will reset the chip's
1246          * transmit, receive, DMA.  It will not effect
1247          * the current PCI configuration.  The global reset bit is self-
1248          * clearing, and should clear within a microsecond.
1249          */
1250         AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1251         ctrl_data |= MASTER_CTRL_OOB_DIS;
1252         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1253
1254         AT_WRITE_FLUSH(hw);
1255         msleep(10);
1256         /* Wait at least 10ms for All module to be Idle */
1257
1258         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1259                 dev_err(&pdev->dev,
1260                         "MAC state machine can't be idle since"
1261                         " disabled for 10ms second\n");
1262                 return -1;
1263         }
1264         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1265
1266         /* driver control speed/duplex */
1267         AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1268         AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1269
1270         /* clk switch setting */
1271         AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1272         switch (hw->nic_type) {
1273         case athr_l2c_b:
1274                 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1275                                 SERDES_MAC_CLK_SLOWDOWN);
1276                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1277                 break;
1278         case athr_l2c_b2:
1279         case athr_l1d_2:
1280                 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1281                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1282                 break;
1283         default:
1284                 break;
1285         }
1286
1287         return 0;
1288 }
1289
1290 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1291 {
1292         u16 ctrl_flags = hw->ctrl_flags;
1293
1294         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1295         atl1c_set_aspm(hw, SPEED_0);
1296         hw->ctrl_flags = ctrl_flags;
1297 }
1298
1299 /*
1300  * Set ASPM state.
1301  * Enable/disable L0s/L1 depend on link state.
1302  */
1303 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1304 {
1305         u32 pm_ctrl_data;
1306         u32 link_l1_timer;
1307
1308         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1309         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1310                           PM_CTRL_ASPM_L0S_EN |
1311                           PM_CTRL_MAC_ASPM_CHK);
1312         /* L1 timer */
1313         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1314                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1315                 link_l1_timer =
1316                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1317                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1318                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1319                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1320         } else {
1321                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1322                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1323                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1324                         link_l1_timer = 1;
1325                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1326                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1327         }
1328
1329         /* L0S/L1 enable */
1330         if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1331                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1332         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1333                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1334
1335         /* l2cb & l1d & l2cb2 & l1d2 */
1336         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1337             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1338                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1339                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1340                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1341                                 PM_CTRL_SERDES_PD_EX_L1 |
1342                                 PM_CTRL_CLK_SWH_L1;
1343                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1344                                   PM_CTRL_SERDES_PLL_L1_EN |
1345                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1346                                   PM_CTRL_SA_DLY_EN |
1347                                   PM_CTRL_HOTRST);
1348                 /* disable l0s if link down or l2cb */
1349                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1350                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1351         } else { /* l1c */
1352                 pm_ctrl_data =
1353                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1354                 if (link_speed != SPEED_0) {
1355                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1356                                         PM_CTRL_SERDES_PLL_L1_EN |
1357                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1358                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1359                                           PM_CTRL_CLK_SWH_L1 |
1360                                           PM_CTRL_ASPM_L0S_EN |
1361                                           PM_CTRL_ASPM_L1_EN);
1362                 } else { /* link down */
1363                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1364                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1365                                           PM_CTRL_SERDES_PLL_L1_EN |
1366                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1367                                           PM_CTRL_ASPM_L0S_EN);
1368                 }
1369         }
1370         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1371
1372         return;
1373 }
1374
1375 /**
1376  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1377  * @adapter: board private structure
1378  *
1379  * Configure the Tx /Rx unit of the MAC after a reset.
1380  */
1381 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1382 {
1383         struct atl1c_hw *hw = &adapter->hw;
1384         u32 master_ctrl_data = 0;
1385         u32 intr_modrt_data;
1386         u32 data;
1387
1388         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1389         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1390                               MASTER_CTRL_RX_ITIMER_EN |
1391                               MASTER_CTRL_INT_RDCLR);
1392         /* clear interrupt status */
1393         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1394         /*  Clear any WOL status */
1395         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1396         /* set Interrupt Clear Timer
1397          * HW will enable self to assert interrupt event to system after
1398          * waiting x-time for software to notify it accept interrupt.
1399          */
1400
1401         data = CLK_GATING_EN_ALL;
1402         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1403                 if (hw->nic_type == athr_l2c_b)
1404                         data &= ~CLK_GATING_RXMAC_EN;
1405         } else
1406                 data = 0;
1407         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1408
1409         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1410                 hw->ict & INT_RETRIG_TIMER_MASK);
1411
1412         atl1c_configure_des_ring(adapter);
1413
1414         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1415                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1416                                         IRQ_MODRT_TX_TIMER_SHIFT;
1417                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1418                                         IRQ_MODRT_RX_TIMER_SHIFT;
1419                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1420                 master_ctrl_data |=
1421                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1422         }
1423
1424         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1425                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1426
1427         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1428         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1429
1430         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1431                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1432
1433         /* set MTU */
1434         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1435                         VLAN_HLEN + ETH_FCS_LEN);
1436
1437         atl1c_configure_tx(adapter);
1438         atl1c_configure_rx(adapter);
1439         atl1c_configure_dma(adapter);
1440
1441         return 0;
1442 }
1443
1444 static int atl1c_configure(struct atl1c_adapter *adapter)
1445 {
1446         struct net_device *netdev = adapter->netdev;
1447         int num;
1448
1449         atl1c_init_ring_ptrs(adapter);
1450         atl1c_set_multi(netdev);
1451         atl1c_restore_vlan(adapter);
1452
1453         num = atl1c_alloc_rx_buffer(adapter);
1454         if (unlikely(num == 0))
1455                 return -ENOMEM;
1456
1457         if (atl1c_configure_mac(adapter))
1458                 return -EIO;
1459
1460         return 0;
1461 }
1462
1463 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1464 {
1465         u16 hw_reg_addr = 0;
1466         unsigned long *stats_item = NULL;
1467         u32 data;
1468
1469         /* update rx status */
1470         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1471         stats_item  = &adapter->hw_stats.rx_ok;
1472         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1473                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1474                 *stats_item += data;
1475                 stats_item++;
1476                 hw_reg_addr += 4;
1477         }
1478 /* update tx status */
1479         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1480         stats_item  = &adapter->hw_stats.tx_ok;
1481         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1482                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1483                 *stats_item += data;
1484                 stats_item++;
1485                 hw_reg_addr += 4;
1486         }
1487 }
1488
1489 /**
1490  * atl1c_get_stats - Get System Network Statistics
1491  * @netdev: network interface device structure
1492  *
1493  * Returns the address of the device statistics structure.
1494  * The statistics are actually updated from the timer callback.
1495  */
1496 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1497 {
1498         struct atl1c_adapter *adapter = netdev_priv(netdev);
1499         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1500         struct net_device_stats *net_stats = &netdev->stats;
1501
1502         atl1c_update_hw_stats(adapter);
1503         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1504         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1505         net_stats->multicast  = hw_stats->rx_mcast;
1506         net_stats->collisions = hw_stats->tx_1_col +
1507                                 hw_stats->tx_2_col +
1508                                 hw_stats->tx_late_col +
1509                                 hw_stats->tx_abort_col;
1510
1511         net_stats->rx_errors  = hw_stats->rx_frag +
1512                                 hw_stats->rx_fcs_err +
1513                                 hw_stats->rx_len_err +
1514                                 hw_stats->rx_sz_ov +
1515                                 hw_stats->rx_rrd_ov +
1516                                 hw_stats->rx_align_err +
1517                                 hw_stats->rx_rxf_ov;
1518
1519         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1520         net_stats->rx_length_errors = hw_stats->rx_len_err;
1521         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1522         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1523         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1524
1525         net_stats->tx_errors = hw_stats->tx_late_col +
1526                                hw_stats->tx_abort_col +
1527                                hw_stats->tx_underrun +
1528                                hw_stats->tx_trunc;
1529
1530         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1531         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1532         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1533
1534         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1535         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1536
1537         return net_stats;
1538 }
1539
1540 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1541 {
1542         u16 phy_data;
1543
1544         spin_lock(&adapter->mdio_lock);
1545         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1546         spin_unlock(&adapter->mdio_lock);
1547 }
1548
1549 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1550                                 enum atl1c_trans_queue type)
1551 {
1552         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1553         struct atl1c_buffer *buffer_info;
1554         struct pci_dev *pdev = adapter->pdev;
1555         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1556         u16 hw_next_to_clean;
1557         u16 reg;
1558         unsigned int total_bytes = 0, total_packets = 0;
1559
1560         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1561
1562         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1563
1564         while (next_to_clean != hw_next_to_clean) {
1565                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1566                 if (buffer_info->skb) {
1567                         total_bytes += buffer_info->skb->len;
1568                         total_packets++;
1569                 }
1570                 atl1c_clean_buffer(pdev, buffer_info);
1571                 if (++next_to_clean == tpd_ring->count)
1572                         next_to_clean = 0;
1573                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1574         }
1575
1576         netdev_completed_queue(adapter->netdev, total_packets, total_bytes);
1577
1578         if (netif_queue_stopped(adapter->netdev) &&
1579                         netif_carrier_ok(adapter->netdev)) {
1580                 netif_wake_queue(adapter->netdev);
1581         }
1582
1583         return true;
1584 }
1585
1586 /**
1587  * atl1c_intr - Interrupt Handler
1588  * @irq: interrupt number
1589  * @data: pointer to a network interface device structure
1590  */
1591 static irqreturn_t atl1c_intr(int irq, void *data)
1592 {
1593         struct net_device *netdev  = data;
1594         struct atl1c_adapter *adapter = netdev_priv(netdev);
1595         struct pci_dev *pdev = adapter->pdev;
1596         struct atl1c_hw *hw = &adapter->hw;
1597         int max_ints = AT_MAX_INT_WORK;
1598         int handled = IRQ_NONE;
1599         u32 status;
1600         u32 reg_data;
1601
1602         do {
1603                 AT_READ_REG(hw, REG_ISR, &reg_data);
1604                 status = reg_data & hw->intr_mask;
1605
1606                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1607                         if (max_ints != AT_MAX_INT_WORK)
1608                                 handled = IRQ_HANDLED;
1609                         break;
1610                 }
1611                 /* link event */
1612                 if (status & ISR_GPHY)
1613                         atl1c_clear_phy_int(adapter);
1614                 /* Ack ISR */
1615                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1616                 if (status & ISR_RX_PKT) {
1617                         if (likely(napi_schedule_prep(&adapter->napi))) {
1618                                 hw->intr_mask &= ~ISR_RX_PKT;
1619                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1620                                 __napi_schedule(&adapter->napi);
1621                         }
1622                 }
1623                 if (status & ISR_TX_PKT)
1624                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1625
1626                 handled = IRQ_HANDLED;
1627                 /* check if PCIE PHY Link down */
1628                 if (status & ISR_ERROR) {
1629                         if (netif_msg_hw(adapter))
1630                                 dev_err(&pdev->dev,
1631                                         "atl1c hardware error (status = 0x%x)\n",
1632                                         status & ISR_ERROR);
1633                         /* reset MAC */
1634                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1635                         schedule_work(&adapter->common_task);
1636                         return IRQ_HANDLED;
1637                 }
1638
1639                 if (status & ISR_OVER)
1640                         if (netif_msg_intr(adapter))
1641                                 dev_warn(&pdev->dev,
1642                                         "TX/RX overflow (status = 0x%x)\n",
1643                                         status & ISR_OVER);
1644
1645                 /* link event */
1646                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1647                         netdev->stats.tx_carrier_errors++;
1648                         atl1c_link_chg_event(adapter);
1649                         break;
1650                 }
1651
1652         } while (--max_ints > 0);
1653         /* re-enable Interrupt*/
1654         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1655         return handled;
1656 }
1657
1658 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1659                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1660 {
1661         /*
1662          * The pid field in RRS in not correct sometimes, so we
1663          * cannot figure out if the packet is fragmented or not,
1664          * so we tell the KERNEL CHECKSUM_NONE
1665          */
1666         skb_checksum_none_assert(skb);
1667 }
1668
1669 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1670 {
1671         struct sk_buff *skb;
1672         struct page *page;
1673
1674         if (adapter->rx_frag_size > PAGE_SIZE)
1675                 return netdev_alloc_skb(adapter->netdev,
1676                                         adapter->rx_buffer_len);
1677
1678         page = adapter->rx_page;
1679         if (!page) {
1680                 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1681                 if (unlikely(!page))
1682                         return NULL;
1683                 adapter->rx_page_offset = 0;
1684         }
1685
1686         skb = build_skb(page_address(page) + adapter->rx_page_offset,
1687                         adapter->rx_frag_size);
1688         if (likely(skb)) {
1689                 adapter->rx_page_offset += adapter->rx_frag_size;
1690                 if (adapter->rx_page_offset >= PAGE_SIZE)
1691                         adapter->rx_page = NULL;
1692                 else
1693                         get_page(page);
1694         }
1695         return skb;
1696 }
1697
1698 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1699 {
1700         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1701         struct pci_dev *pdev = adapter->pdev;
1702         struct atl1c_buffer *buffer_info, *next_info;
1703         struct sk_buff *skb;
1704         void *vir_addr = NULL;
1705         u16 num_alloc = 0;
1706         u16 rfd_next_to_use, next_next;
1707         struct atl1c_rx_free_desc *rfd_desc;
1708         dma_addr_t mapping;
1709
1710         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1711         if (++next_next == rfd_ring->count)
1712                 next_next = 0;
1713         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1714         next_info = &rfd_ring->buffer_info[next_next];
1715
1716         while (next_info->flags & ATL1C_BUFFER_FREE) {
1717                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1718
1719                 skb = atl1c_alloc_skb(adapter);
1720                 if (unlikely(!skb)) {
1721                         if (netif_msg_rx_err(adapter))
1722                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1723                         break;
1724                 }
1725
1726                 /*
1727                  * Make buffer alignment 2 beyond a 16 byte boundary
1728                  * this will result in a 16 byte aligned IP header after
1729                  * the 14 byte MAC header is removed
1730                  */
1731                 vir_addr = skb->data;
1732                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1733                 buffer_info->skb = skb;
1734                 buffer_info->length = adapter->rx_buffer_len;
1735                 mapping = pci_map_single(pdev, vir_addr,
1736                                                 buffer_info->length,
1737                                                 PCI_DMA_FROMDEVICE);
1738                 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1739                         dev_kfree_skb(skb);
1740                         buffer_info->skb = NULL;
1741                         buffer_info->length = 0;
1742                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1743                         netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1744                         break;
1745                 }
1746                 buffer_info->dma = mapping;
1747                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1748                         ATL1C_PCIMAP_FROMDEVICE);
1749                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1750                 rfd_next_to_use = next_next;
1751                 if (++next_next == rfd_ring->count)
1752                         next_next = 0;
1753                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1754                 next_info = &rfd_ring->buffer_info[next_next];
1755                 num_alloc++;
1756         }
1757
1758         if (num_alloc) {
1759                 /* TODO: update mailbox here */
1760                 wmb();
1761                 rfd_ring->next_to_use = rfd_next_to_use;
1762                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1763                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1764         }
1765
1766         return num_alloc;
1767 }
1768
1769 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1770                         struct  atl1c_recv_ret_status *rrs, u16 num)
1771 {
1772         u16 i;
1773         /* the relationship between rrd and rfd is one map one */
1774         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1775                                         rrd_ring->next_to_clean)) {
1776                 rrs->word3 &= ~RRS_RXD_UPDATED;
1777                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1778                         rrd_ring->next_to_clean = 0;
1779         }
1780 }
1781
1782 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1783         struct atl1c_recv_ret_status *rrs, u16 num)
1784 {
1785         u16 i;
1786         u16 rfd_index;
1787         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1788
1789         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1790                         RRS_RX_RFD_INDEX_MASK;
1791         for (i = 0; i < num; i++) {
1792                 buffer_info[rfd_index].skb = NULL;
1793                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1794                                         ATL1C_BUFFER_FREE);
1795                 if (++rfd_index == rfd_ring->count)
1796                         rfd_index = 0;
1797         }
1798         rfd_ring->next_to_clean = rfd_index;
1799 }
1800
1801 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1802                    int *work_done, int work_to_do)
1803 {
1804         u16 rfd_num, rfd_index;
1805         u16 count = 0;
1806         u16 length;
1807         struct pci_dev *pdev = adapter->pdev;
1808         struct net_device *netdev  = adapter->netdev;
1809         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1810         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1811         struct sk_buff *skb;
1812         struct atl1c_recv_ret_status *rrs;
1813         struct atl1c_buffer *buffer_info;
1814
1815         while (1) {
1816                 if (*work_done >= work_to_do)
1817                         break;
1818                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1819                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1820                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1821                                 RRS_RX_RFD_CNT_MASK;
1822                         if (unlikely(rfd_num != 1))
1823                                 /* TODO support mul rfd*/
1824                                 if (netif_msg_rx_err(adapter))
1825                                         dev_warn(&pdev->dev,
1826                                                 "Multi rfd not support yet!\n");
1827                         goto rrs_checked;
1828                 } else {
1829                         break;
1830                 }
1831 rrs_checked:
1832                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1833                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1834                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1835                                 if (netif_msg_rx_err(adapter))
1836                                         dev_warn(&pdev->dev,
1837                                                 "wrong packet! rrs word3 is %x\n",
1838                                                 rrs->word3);
1839                         continue;
1840                 }
1841
1842                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1843                                 RRS_PKT_SIZE_MASK);
1844                 /* Good Receive */
1845                 if (likely(rfd_num == 1)) {
1846                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1847                                         RRS_RX_RFD_INDEX_MASK;
1848                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1849                         pci_unmap_single(pdev, buffer_info->dma,
1850                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1851                         skb = buffer_info->skb;
1852                 } else {
1853                         /* TODO */
1854                         if (netif_msg_rx_err(adapter))
1855                                 dev_warn(&pdev->dev,
1856                                         "Multi rfd not support yet!\n");
1857                         break;
1858                 }
1859                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1860                 skb_put(skb, length - ETH_FCS_LEN);
1861                 skb->protocol = eth_type_trans(skb, netdev);
1862                 atl1c_rx_checksum(adapter, skb, rrs);
1863                 if (rrs->word3 & RRS_VLAN_INS) {
1864                         u16 vlan;
1865
1866                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1867                         vlan = le16_to_cpu(vlan);
1868                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1869                 }
1870                 netif_receive_skb(skb);
1871
1872                 (*work_done)++;
1873                 count++;
1874         }
1875         if (count)
1876                 atl1c_alloc_rx_buffer(adapter);
1877 }
1878
1879 /**
1880  * atl1c_clean - NAPI Rx polling callback
1881  */
1882 static int atl1c_clean(struct napi_struct *napi, int budget)
1883 {
1884         struct atl1c_adapter *adapter =
1885                         container_of(napi, struct atl1c_adapter, napi);
1886         int work_done = 0;
1887
1888         /* Keep link state information with original netdev */
1889         if (!netif_carrier_ok(adapter->netdev))
1890                 goto quit_polling;
1891         /* just enable one RXQ */
1892         atl1c_clean_rx_irq(adapter, &work_done, budget);
1893
1894         if (work_done < budget) {
1895 quit_polling:
1896                 napi_complete_done(napi, work_done);
1897                 adapter->hw.intr_mask |= ISR_RX_PKT;
1898                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1899         }
1900         return work_done;
1901 }
1902
1903 #ifdef CONFIG_NET_POLL_CONTROLLER
1904
1905 /*
1906  * Polling 'interrupt' - used by things like netconsole to send skbs
1907  * without having to re-enable interrupts. It's not called while
1908  * the interrupt routine is executing.
1909  */
1910 static void atl1c_netpoll(struct net_device *netdev)
1911 {
1912         struct atl1c_adapter *adapter = netdev_priv(netdev);
1913
1914         disable_irq(adapter->pdev->irq);
1915         atl1c_intr(adapter->pdev->irq, netdev);
1916         enable_irq(adapter->pdev->irq);
1917 }
1918 #endif
1919
1920 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1921 {
1922         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1923         u16 next_to_use = 0;
1924         u16 next_to_clean = 0;
1925
1926         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1927         next_to_use   = tpd_ring->next_to_use;
1928
1929         return (u16)(next_to_clean > next_to_use) ?
1930                 (next_to_clean - next_to_use - 1) :
1931                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1932 }
1933
1934 /*
1935  * get next usable tpd
1936  * Note: should call atl1c_tdp_avail to make sure
1937  * there is enough tpd to use
1938  */
1939 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1940         enum atl1c_trans_queue type)
1941 {
1942         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1943         struct atl1c_tpd_desc *tpd_desc;
1944         u16 next_to_use = 0;
1945
1946         next_to_use = tpd_ring->next_to_use;
1947         if (++tpd_ring->next_to_use == tpd_ring->count)
1948                 tpd_ring->next_to_use = 0;
1949         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1950         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1951         return  tpd_desc;
1952 }
1953
1954 static struct atl1c_buffer *
1955 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1956 {
1957         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1958
1959         return &tpd_ring->buffer_info[tpd -
1960                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1961 }
1962
1963 /* Calculate the transmit packet descript needed*/
1964 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1965 {
1966         u16 tpd_req;
1967         u16 proto_hdr_len = 0;
1968
1969         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1970
1971         if (skb_is_gso(skb)) {
1972                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1973                 if (proto_hdr_len < skb_headlen(skb))
1974                         tpd_req++;
1975                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1976                         tpd_req++;
1977         }
1978         return tpd_req;
1979 }
1980
1981 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1982                           struct sk_buff *skb,
1983                           struct atl1c_tpd_desc **tpd,
1984                           enum atl1c_trans_queue type)
1985 {
1986         struct pci_dev *pdev = adapter->pdev;
1987         unsigned short offload_type;
1988         u8 hdr_len;
1989         u32 real_len;
1990
1991         if (skb_is_gso(skb)) {
1992                 int err;
1993
1994                 err = skb_cow_head(skb, 0);
1995                 if (err < 0)
1996                         return err;
1997
1998                 offload_type = skb_shinfo(skb)->gso_type;
1999
2000                 if (offload_type & SKB_GSO_TCPV4) {
2001                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2002                                         + ntohs(ip_hdr(skb)->tot_len));
2003
2004                         if (real_len < skb->len)
2005                                 pskb_trim(skb, real_len);
2006
2007                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2008                         if (unlikely(skb->len == hdr_len)) {
2009                                 /* only xsum need */
2010                                 if (netif_msg_tx_queued(adapter))
2011                                         dev_warn(&pdev->dev,
2012                                                 "IPV4 tso with zero data??\n");
2013                                 goto check_sum;
2014                         } else {
2015                                 ip_hdr(skb)->check = 0;
2016                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2017                                                         ip_hdr(skb)->saddr,
2018                                                         ip_hdr(skb)->daddr,
2019                                                         0, IPPROTO_TCP, 0);
2020                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2021                         }
2022                 }
2023
2024                 if (offload_type & SKB_GSO_TCPV6) {
2025                         struct atl1c_tpd_ext_desc *etpd =
2026                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2027
2028                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2029                         *tpd = atl1c_get_tpd(adapter, type);
2030                         ipv6_hdr(skb)->payload_len = 0;
2031                         /* check payload == 0 byte ? */
2032                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2033                         if (unlikely(skb->len == hdr_len)) {
2034                                 /* only xsum need */
2035                                 if (netif_msg_tx_queued(adapter))
2036                                         dev_warn(&pdev->dev,
2037                                                 "IPV6 tso with zero data??\n");
2038                                 goto check_sum;
2039                         } else
2040                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2041                                                 &ipv6_hdr(skb)->saddr,
2042                                                 &ipv6_hdr(skb)->daddr,
2043                                                 0, IPPROTO_TCP, 0);
2044                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2045                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2046                         etpd->pkt_len = cpu_to_le32(skb->len);
2047                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2048                 }
2049
2050                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2051                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2052                                 TPD_TCPHDR_OFFSET_SHIFT;
2053                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2054                                 TPD_MSS_SHIFT;
2055                 return 0;
2056         }
2057
2058 check_sum:
2059         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2060                 u8 css, cso;
2061                 cso = skb_checksum_start_offset(skb);
2062
2063                 if (unlikely(cso & 0x1)) {
2064                         if (netif_msg_tx_err(adapter))
2065                                 dev_err(&adapter->pdev->dev,
2066                                         "payload offset should not an event number\n");
2067                         return -1;
2068                 } else {
2069                         css = cso + skb->csum_offset;
2070
2071                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2072                                         TPD_PLOADOFFSET_SHIFT;
2073                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2074                                         TPD_CCSUM_OFFSET_SHIFT;
2075                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2076                 }
2077         }
2078         return 0;
2079 }
2080
2081 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2082                               struct atl1c_tpd_desc *first_tpd,
2083                               enum atl1c_trans_queue type)
2084 {
2085         struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2086         struct atl1c_buffer *buffer_info;
2087         struct atl1c_tpd_desc *tpd;
2088         u16 first_index, index;
2089
2090         first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2091         index = first_index;
2092         while (index != tpd_ring->next_to_use) {
2093                 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2094                 buffer_info = &tpd_ring->buffer_info[index];
2095                 atl1c_clean_buffer(adpt->pdev, buffer_info);
2096                 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2097                 if (++index == tpd_ring->count)
2098                         index = 0;
2099         }
2100         tpd_ring->next_to_use = first_index;
2101 }
2102
2103 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2104                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2105                         enum atl1c_trans_queue type)
2106 {
2107         struct atl1c_tpd_desc *use_tpd = NULL;
2108         struct atl1c_buffer *buffer_info = NULL;
2109         u16 buf_len = skb_headlen(skb);
2110         u16 map_len = 0;
2111         u16 mapped_len = 0;
2112         u16 hdr_len = 0;
2113         u16 nr_frags;
2114         u16 f;
2115         int tso;
2116
2117         nr_frags = skb_shinfo(skb)->nr_frags;
2118         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2119         if (tso) {
2120                 /* TSO */
2121                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2122                 use_tpd = tpd;
2123
2124                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2125                 buffer_info->length = map_len;
2126                 buffer_info->dma = pci_map_single(adapter->pdev,
2127                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2128                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2129                                                    buffer_info->dma)))
2130                         goto err_dma;
2131                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2132                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2133                         ATL1C_PCIMAP_TODEVICE);
2134                 mapped_len += map_len;
2135                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2136                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2137         }
2138
2139         if (mapped_len < buf_len) {
2140                 /* mapped_len == 0, means we should use the first tpd,
2141                    which is given by caller  */
2142                 if (mapped_len == 0)
2143                         use_tpd = tpd;
2144                 else {
2145                         use_tpd = atl1c_get_tpd(adapter, type);
2146                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2147                 }
2148                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2149                 buffer_info->length = buf_len - mapped_len;
2150                 buffer_info->dma =
2151                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2152                                         buffer_info->length, PCI_DMA_TODEVICE);
2153                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2154                                                    buffer_info->dma)))
2155                         goto err_dma;
2156
2157                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2158                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2159                         ATL1C_PCIMAP_TODEVICE);
2160                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2161                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2162         }
2163
2164         for (f = 0; f < nr_frags; f++) {
2165                 struct skb_frag_struct *frag;
2166
2167                 frag = &skb_shinfo(skb)->frags[f];
2168
2169                 use_tpd = atl1c_get_tpd(adapter, type);
2170                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2171
2172                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2173                 buffer_info->length = skb_frag_size(frag);
2174                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2175                                                     frag, 0,
2176                                                     buffer_info->length,
2177                                                     DMA_TO_DEVICE);
2178                 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2179                         goto err_dma;
2180
2181                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2182                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2183                         ATL1C_PCIMAP_TODEVICE);
2184                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2185                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2186         }
2187
2188         /* The last tpd */
2189         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2190         /* The last buffer info contain the skb address,
2191            so it will be free after unmap */
2192         buffer_info->skb = skb;
2193
2194         return 0;
2195
2196 err_dma:
2197         buffer_info->dma = 0;
2198         buffer_info->length = 0;
2199         return -1;
2200 }
2201
2202 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2203                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2204 {
2205         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2206         u16 reg;
2207
2208         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2209         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2210 }
2211
2212 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2213                                           struct net_device *netdev)
2214 {
2215         struct atl1c_adapter *adapter = netdev_priv(netdev);
2216         u16 tpd_req = 1;
2217         struct atl1c_tpd_desc *tpd;
2218         enum atl1c_trans_queue type = atl1c_trans_normal;
2219
2220         if (test_bit(__AT_DOWN, &adapter->flags)) {
2221                 dev_kfree_skb_any(skb);
2222                 return NETDEV_TX_OK;
2223         }
2224
2225         tpd_req = atl1c_cal_tpd_req(skb);
2226
2227         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2228                 /* no enough descriptor, just stop queue */
2229                 netif_stop_queue(netdev);
2230                 return NETDEV_TX_BUSY;
2231         }
2232
2233         tpd = atl1c_get_tpd(adapter, type);
2234
2235         /* do TSO and check sum */
2236         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2237                 dev_kfree_skb_any(skb);
2238                 return NETDEV_TX_OK;
2239         }
2240
2241         if (unlikely(skb_vlan_tag_present(skb))) {
2242                 u16 vlan = skb_vlan_tag_get(skb);
2243                 __le16 tag;
2244
2245                 vlan = cpu_to_le16(vlan);
2246                 AT_VLAN_TO_TAG(vlan, tag);
2247                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2248                 tpd->vlan_tag = tag;
2249         }
2250
2251         if (skb_network_offset(skb) != ETH_HLEN)
2252                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2253
2254         if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2255                 netif_info(adapter, tx_done, adapter->netdev,
2256                            "tx-skb dropped due to dma error\n");
2257                 /* roll back tpd/buffer */
2258                 atl1c_tx_rollback(adapter, tpd, type);
2259                 dev_kfree_skb_any(skb);
2260         } else {
2261                 netdev_sent_queue(adapter->netdev, skb->len);
2262                 atl1c_tx_queue(adapter, skb, tpd, type);
2263         }
2264
2265         return NETDEV_TX_OK;
2266 }
2267
2268 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2269 {
2270         struct net_device *netdev = adapter->netdev;
2271
2272         free_irq(adapter->pdev->irq, netdev);
2273
2274         if (adapter->have_msi)
2275                 pci_disable_msi(adapter->pdev);
2276 }
2277
2278 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2279 {
2280         struct pci_dev    *pdev   = adapter->pdev;
2281         struct net_device *netdev = adapter->netdev;
2282         int flags = 0;
2283         int err = 0;
2284
2285         adapter->have_msi = true;
2286         err = pci_enable_msi(adapter->pdev);
2287         if (err) {
2288                 if (netif_msg_ifup(adapter))
2289                         dev_err(&pdev->dev,
2290                                 "Unable to allocate MSI interrupt Error: %d\n",
2291                                 err);
2292                 adapter->have_msi = false;
2293         }
2294
2295         if (!adapter->have_msi)
2296                 flags |= IRQF_SHARED;
2297         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2298                         netdev->name, netdev);
2299         if (err) {
2300                 if (netif_msg_ifup(adapter))
2301                         dev_err(&pdev->dev,
2302                                 "Unable to allocate interrupt Error: %d\n",
2303                                 err);
2304                 if (adapter->have_msi)
2305                         pci_disable_msi(adapter->pdev);
2306                 return err;
2307         }
2308         if (netif_msg_ifup(adapter))
2309                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2310         return err;
2311 }
2312
2313
2314 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2315 {
2316         /* release tx-pending skbs and reset tx/rx ring index */
2317         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2318         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2319         atl1c_clean_rx_ring(adapter);
2320 }
2321
2322 static int atl1c_up(struct atl1c_adapter *adapter)
2323 {
2324         struct net_device *netdev = adapter->netdev;
2325         int err;
2326
2327         netif_carrier_off(netdev);
2328
2329         err = atl1c_configure(adapter);
2330         if (unlikely(err))
2331                 goto err_up;
2332
2333         err = atl1c_request_irq(adapter);
2334         if (unlikely(err))
2335                 goto err_up;
2336
2337         atl1c_check_link_status(adapter);
2338         clear_bit(__AT_DOWN, &adapter->flags);
2339         napi_enable(&adapter->napi);
2340         atl1c_irq_enable(adapter);
2341         netif_start_queue(netdev);
2342         return err;
2343
2344 err_up:
2345         atl1c_clean_rx_ring(adapter);
2346         return err;
2347 }
2348
2349 static void atl1c_down(struct atl1c_adapter *adapter)
2350 {
2351         struct net_device *netdev = adapter->netdev;
2352
2353         atl1c_del_timer(adapter);
2354         adapter->work_event = 0; /* clear all event */
2355         /* signal that we're down so the interrupt handler does not
2356          * reschedule our watchdog timer */
2357         set_bit(__AT_DOWN, &adapter->flags);
2358         netif_carrier_off(netdev);
2359         napi_disable(&adapter->napi);
2360         atl1c_irq_disable(adapter);
2361         atl1c_free_irq(adapter);
2362         /* disable ASPM if device inactive */
2363         atl1c_disable_l0s_l1(&adapter->hw);
2364         /* reset MAC to disable all RX/TX */
2365         atl1c_reset_mac(&adapter->hw);
2366         msleep(1);
2367
2368         adapter->link_speed = SPEED_0;
2369         adapter->link_duplex = -1;
2370         atl1c_reset_dma_ring(adapter);
2371 }
2372
2373 /**
2374  * atl1c_open - Called when a network interface is made active
2375  * @netdev: network interface device structure
2376  *
2377  * Returns 0 on success, negative value on failure
2378  *
2379  * The open entry point is called when a network interface is made
2380  * active by the system (IFF_UP).  At this point all resources needed
2381  * for transmit and receive operations are allocated, the interrupt
2382  * handler is registered with the OS, the watchdog timer is started,
2383  * and the stack is notified that the interface is ready.
2384  */
2385 static int atl1c_open(struct net_device *netdev)
2386 {
2387         struct atl1c_adapter *adapter = netdev_priv(netdev);
2388         int err;
2389
2390         /* disallow open during test */
2391         if (test_bit(__AT_TESTING, &adapter->flags))
2392                 return -EBUSY;
2393
2394         /* allocate rx/tx dma buffer & descriptors */
2395         err = atl1c_setup_ring_resources(adapter);
2396         if (unlikely(err))
2397                 return err;
2398
2399         err = atl1c_up(adapter);
2400         if (unlikely(err))
2401                 goto err_up;
2402
2403         return 0;
2404
2405 err_up:
2406         atl1c_free_irq(adapter);
2407         atl1c_free_ring_resources(adapter);
2408         atl1c_reset_mac(&adapter->hw);
2409         return err;
2410 }
2411
2412 /**
2413  * atl1c_close - Disables a network interface
2414  * @netdev: network interface device structure
2415  *
2416  * Returns 0, this is not allowed to fail
2417  *
2418  * The close entry point is called when an interface is de-activated
2419  * by the OS.  The hardware is still under the drivers control, but
2420  * needs to be disabled.  A global MAC reset is issued to stop the
2421  * hardware, and all transmit and receive resources are freed.
2422  */
2423 static int atl1c_close(struct net_device *netdev)
2424 {
2425         struct atl1c_adapter *adapter = netdev_priv(netdev);
2426
2427         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2428         set_bit(__AT_DOWN, &adapter->flags);
2429         cancel_work_sync(&adapter->common_task);
2430         atl1c_down(adapter);
2431         atl1c_free_ring_resources(adapter);
2432         return 0;
2433 }
2434
2435 static int atl1c_suspend(struct device *dev)
2436 {
2437         struct pci_dev *pdev = to_pci_dev(dev);
2438         struct net_device *netdev = pci_get_drvdata(pdev);
2439         struct atl1c_adapter *adapter = netdev_priv(netdev);
2440         struct atl1c_hw *hw = &adapter->hw;
2441         u32 wufc = adapter->wol;
2442
2443         atl1c_disable_l0s_l1(hw);
2444         if (netif_running(netdev)) {
2445                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2446                 atl1c_down(adapter);
2447         }
2448         netif_device_detach(netdev);
2449
2450         if (wufc)
2451                 if (atl1c_phy_to_ps_link(hw) != 0)
2452                         dev_dbg(&pdev->dev, "phy power saving failed");
2453
2454         atl1c_power_saving(hw, wufc);
2455
2456         return 0;
2457 }
2458
2459 #ifdef CONFIG_PM_SLEEP
2460 static int atl1c_resume(struct device *dev)
2461 {
2462         struct pci_dev *pdev = to_pci_dev(dev);
2463         struct net_device *netdev = pci_get_drvdata(pdev);
2464         struct atl1c_adapter *adapter = netdev_priv(netdev);
2465
2466         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2467         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2468
2469         atl1c_phy_reset(&adapter->hw);
2470         atl1c_reset_mac(&adapter->hw);
2471         atl1c_phy_init(&adapter->hw);
2472
2473 #if 0
2474         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2475         pm_data &= ~PM_CTRLSTAT_PME_EN;
2476         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2477 #endif
2478
2479         netif_device_attach(netdev);
2480         if (netif_running(netdev))
2481                 atl1c_up(adapter);
2482
2483         return 0;
2484 }
2485 #endif
2486
2487 static void atl1c_shutdown(struct pci_dev *pdev)
2488 {
2489         struct net_device *netdev = pci_get_drvdata(pdev);
2490         struct atl1c_adapter *adapter = netdev_priv(netdev);
2491
2492         atl1c_suspend(&pdev->dev);
2493         pci_wake_from_d3(pdev, adapter->wol);
2494         pci_set_power_state(pdev, PCI_D3hot);
2495 }
2496
2497 static const struct net_device_ops atl1c_netdev_ops = {
2498         .ndo_open               = atl1c_open,
2499         .ndo_stop               = atl1c_close,
2500         .ndo_validate_addr      = eth_validate_addr,
2501         .ndo_start_xmit         = atl1c_xmit_frame,
2502         .ndo_set_mac_address    = atl1c_set_mac_addr,
2503         .ndo_set_rx_mode        = atl1c_set_multi,
2504         .ndo_change_mtu         = atl1c_change_mtu,
2505         .ndo_fix_features       = atl1c_fix_features,
2506         .ndo_set_features       = atl1c_set_features,
2507         .ndo_do_ioctl           = atl1c_ioctl,
2508         .ndo_tx_timeout         = atl1c_tx_timeout,
2509         .ndo_get_stats          = atl1c_get_stats,
2510 #ifdef CONFIG_NET_POLL_CONTROLLER
2511         .ndo_poll_controller    = atl1c_netpoll,
2512 #endif
2513 };
2514
2515 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2516 {
2517         SET_NETDEV_DEV(netdev, &pdev->dev);
2518         pci_set_drvdata(pdev, netdev);
2519
2520         netdev->netdev_ops = &atl1c_netdev_ops;
2521         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2522         netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2523         atl1c_set_ethtool_ops(netdev);
2524
2525         /* TODO: add when ready */
2526         netdev->hw_features =   NETIF_F_SG              |
2527                                 NETIF_F_HW_CSUM         |
2528                                 NETIF_F_HW_VLAN_CTAG_RX |
2529                                 NETIF_F_TSO             |
2530                                 NETIF_F_TSO6;
2531         netdev->features =      netdev->hw_features     |
2532                                 NETIF_F_HW_VLAN_CTAG_TX;
2533         return 0;
2534 }
2535
2536 /**
2537  * atl1c_probe - Device Initialization Routine
2538  * @pdev: PCI device information struct
2539  * @ent: entry in atl1c_pci_tbl
2540  *
2541  * Returns 0 on success, negative on failure
2542  *
2543  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2544  * The OS initialization, configuring of the adapter private structure,
2545  * and a hardware reset occur.
2546  */
2547 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2548 {
2549         struct net_device *netdev;
2550         struct atl1c_adapter *adapter;
2551         static int cards_found;
2552
2553         int err = 0;
2554
2555         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2556         err = pci_enable_device_mem(pdev);
2557         if (err) {
2558                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2559                 return err;
2560         }
2561
2562         /*
2563          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2564          * shared register for the high 32 bits, so only a single, aligned,
2565          * 4 GB physical address range can be used at a time.
2566          *
2567          * Supporting 64-bit DMA on this hardware is more trouble than it's
2568          * worth.  It is far easier to limit to 32-bit DMA than update
2569          * various kernel subsystems to support the mechanics required by a
2570          * fixed-high-32-bit system.
2571          */
2572         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2573             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2574                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2575                 goto err_dma;
2576         }
2577
2578         err = pci_request_regions(pdev, atl1c_driver_name);
2579         if (err) {
2580                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2581                 goto err_pci_reg;
2582         }
2583
2584         pci_set_master(pdev);
2585
2586         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2587         if (netdev == NULL) {
2588                 err = -ENOMEM;
2589                 goto err_alloc_etherdev;
2590         }
2591
2592         err = atl1c_init_netdev(netdev, pdev);
2593         if (err) {
2594                 dev_err(&pdev->dev, "init netdevice failed\n");
2595                 goto err_init_netdev;
2596         }
2597         adapter = netdev_priv(netdev);
2598         adapter->bd_number = cards_found;
2599         adapter->netdev = netdev;
2600         adapter->pdev = pdev;
2601         adapter->hw.adapter = adapter;
2602         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2603         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2604         if (!adapter->hw.hw_addr) {
2605                 err = -EIO;
2606                 dev_err(&pdev->dev, "cannot map device registers\n");
2607                 goto err_ioremap;
2608         }
2609
2610         /* init mii data */
2611         adapter->mii.dev = netdev;
2612         adapter->mii.mdio_read  = atl1c_mdio_read;
2613         adapter->mii.mdio_write = atl1c_mdio_write;
2614         adapter->mii.phy_id_mask = 0x1f;
2615         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2616         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2617         timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0);
2618         /* setup the private structure */
2619         err = atl1c_sw_init(adapter);
2620         if (err) {
2621                 dev_err(&pdev->dev, "net device private data init failed\n");
2622                 goto err_sw_init;
2623         }
2624         /* set max MTU */
2625         atl1c_set_max_mtu(netdev);
2626
2627         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2628
2629         /* Init GPHY as early as possible due to power saving issue  */
2630         atl1c_phy_reset(&adapter->hw);
2631
2632         err = atl1c_reset_mac(&adapter->hw);
2633         if (err) {
2634                 err = -EIO;
2635                 goto err_reset;
2636         }
2637
2638         /* reset the controller to
2639          * put the device in a known good starting state */
2640         err = atl1c_phy_init(&adapter->hw);
2641         if (err) {
2642                 err = -EIO;
2643                 goto err_reset;
2644         }
2645         if (atl1c_read_mac_addr(&adapter->hw)) {
2646                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2647                 netdev->addr_assign_type = NET_ADDR_RANDOM;
2648         }
2649         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2650         if (netif_msg_probe(adapter))
2651                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2652                         adapter->hw.mac_addr);
2653
2654         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2655         INIT_WORK(&adapter->common_task, atl1c_common_task);
2656         adapter->work_event = 0;
2657         err = register_netdev(netdev);
2658         if (err) {
2659                 dev_err(&pdev->dev, "register netdevice failed\n");
2660                 goto err_register;
2661         }
2662
2663         if (netif_msg_probe(adapter))
2664                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2665         cards_found++;
2666         return 0;
2667
2668 err_reset:
2669 err_register:
2670 err_sw_init:
2671         iounmap(adapter->hw.hw_addr);
2672 err_init_netdev:
2673 err_ioremap:
2674         free_netdev(netdev);
2675 err_alloc_etherdev:
2676         pci_release_regions(pdev);
2677 err_pci_reg:
2678 err_dma:
2679         pci_disable_device(pdev);
2680         return err;
2681 }
2682
2683 /**
2684  * atl1c_remove - Device Removal Routine
2685  * @pdev: PCI device information struct
2686  *
2687  * atl1c_remove is called by the PCI subsystem to alert the driver
2688  * that it should release a PCI device.  The could be caused by a
2689  * Hot-Plug event, or because the driver is going to be removed from
2690  * memory.
2691  */
2692 static void atl1c_remove(struct pci_dev *pdev)
2693 {
2694         struct net_device *netdev = pci_get_drvdata(pdev);
2695         struct atl1c_adapter *adapter = netdev_priv(netdev);
2696
2697         unregister_netdev(netdev);
2698         /* restore permanent address */
2699         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2700         atl1c_phy_disable(&adapter->hw);
2701
2702         iounmap(adapter->hw.hw_addr);
2703
2704         pci_release_regions(pdev);
2705         pci_disable_device(pdev);
2706         free_netdev(netdev);
2707 }
2708
2709 /**
2710  * atl1c_io_error_detected - called when PCI error is detected
2711  * @pdev: Pointer to PCI device
2712  * @state: The current pci connection state
2713  *
2714  * This function is called after a PCI bus error affecting
2715  * this device has been detected.
2716  */
2717 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2718                                                 pci_channel_state_t state)
2719 {
2720         struct net_device *netdev = pci_get_drvdata(pdev);
2721         struct atl1c_adapter *adapter = netdev_priv(netdev);
2722
2723         netif_device_detach(netdev);
2724
2725         if (state == pci_channel_io_perm_failure)
2726                 return PCI_ERS_RESULT_DISCONNECT;
2727
2728         if (netif_running(netdev))
2729                 atl1c_down(adapter);
2730
2731         pci_disable_device(pdev);
2732
2733         /* Request a slot slot reset. */
2734         return PCI_ERS_RESULT_NEED_RESET;
2735 }
2736
2737 /**
2738  * atl1c_io_slot_reset - called after the pci bus has been reset.
2739  * @pdev: Pointer to PCI device
2740  *
2741  * Restart the card from scratch, as if from a cold-boot. Implementation
2742  * resembles the first-half of the e1000_resume routine.
2743  */
2744 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2745 {
2746         struct net_device *netdev = pci_get_drvdata(pdev);
2747         struct atl1c_adapter *adapter = netdev_priv(netdev);
2748
2749         if (pci_enable_device(pdev)) {
2750                 if (netif_msg_hw(adapter))
2751                         dev_err(&pdev->dev,
2752                                 "Cannot re-enable PCI device after reset\n");
2753                 return PCI_ERS_RESULT_DISCONNECT;
2754         }
2755         pci_set_master(pdev);
2756
2757         pci_enable_wake(pdev, PCI_D3hot, 0);
2758         pci_enable_wake(pdev, PCI_D3cold, 0);
2759
2760         atl1c_reset_mac(&adapter->hw);
2761
2762         return PCI_ERS_RESULT_RECOVERED;
2763 }
2764
2765 /**
2766  * atl1c_io_resume - called when traffic can start flowing again.
2767  * @pdev: Pointer to PCI device
2768  *
2769  * This callback is called when the error recovery driver tells us that
2770  * its OK to resume normal operation. Implementation resembles the
2771  * second-half of the atl1c_resume routine.
2772  */
2773 static void atl1c_io_resume(struct pci_dev *pdev)
2774 {
2775         struct net_device *netdev = pci_get_drvdata(pdev);
2776         struct atl1c_adapter *adapter = netdev_priv(netdev);
2777
2778         if (netif_running(netdev)) {
2779                 if (atl1c_up(adapter)) {
2780                         if (netif_msg_hw(adapter))
2781                                 dev_err(&pdev->dev,
2782                                         "Cannot bring device back up after reset\n");
2783                         return;
2784                 }
2785         }
2786
2787         netif_device_attach(netdev);
2788 }
2789
2790 static const struct pci_error_handlers atl1c_err_handler = {
2791         .error_detected = atl1c_io_error_detected,
2792         .slot_reset = atl1c_io_slot_reset,
2793         .resume = atl1c_io_resume,
2794 };
2795
2796 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2797
2798 static struct pci_driver atl1c_driver = {
2799         .name     = atl1c_driver_name,
2800         .id_table = atl1c_pci_tbl,
2801         .probe    = atl1c_probe,
2802         .remove   = atl1c_remove,
2803         .shutdown = atl1c_shutdown,
2804         .err_handler = &atl1c_err_handler,
2805         .driver.pm = &atl1c_pm_ops,
2806 };
2807
2808 module_pci_driver(atl1c_driver);