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 DEFINE_PCI_DEVICE_TABLE(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("Qualcom 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 static const u16 atl1c_pay_load_size[] = {
  69         128, 256, 512, 1024, 2048, 4096,
  70 };
  71
  72
  73 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  74         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  75 static void atl1c_pcie_patch(struct atl1c_hw *hw)
  76 {
  77         u32 mst_data, data;
  78
  79         /* pclk sel could switch to 25M */
  80         AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
  81         mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
  82         AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
  83
  84         /* WoL/PCIE related settings */
  85         if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
  86                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
  87                 data |= PCIE_PHYMISC_FORCE_RCV_DET;
  88                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
  89         } else { /* new dev set bit5 of MASTER */
  90                 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
  91                         AT_WRITE_REG(hw, REG_MASTER_CTRL,
  92                                 mst_data | MASTER_CTRL_WAKEN_25M);
  93         }
  94         /* aspm/PCIE setting only for l2cb 1.0 */
  95         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
  96                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
  97                 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
  98                         L2CB1_PCIE_PHYMISC2_CDR_BW);
  99                 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
 100                         L2CB1_PCIE_PHYMISC2_L0S_TH);
 101                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
 102                 /* extend L1 sync timer */
 103                 AT_READ_REG(hw, REG_LINK_CTRL, &data);
 104                 data |= LINK_CTRL_EXT_SYNC;
 105                 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
 106         }
 107         /* l2cb 1.x & l1d 1.x */
 108         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
 109                 AT_READ_REG(hw, REG_PM_CTRL, &data);
 110                 data |= PM_CTRL_L0S_BUFSRX_EN;
 111                 AT_WRITE_REG(hw, REG_PM_CTRL, data);
 112                 /* clear vendor msg */
 113                 AT_READ_REG(hw, REG_DMA_DBG, &data);
 114                 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
 115         }
 116 }
 117
 118 /* FIXME: no need any more ? */
 119 /*
 120  * atl1c_init_pcie - init PCIE module
 121  */
 122 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 123 {
 124         u32 data;
 125         u32 pci_cmd;
 126         struct pci_dev *pdev = hw->adapter->pdev;
 127         int pos;
 128
 129         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 130         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 131         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 132                 PCI_COMMAND_IO);
 133         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 134
 135         /*
 136          * Clear any PowerSaveing Settings
 137          */
 138         pci_enable_wake(pdev, PCI_D3hot, 0);
 139         pci_enable_wake(pdev, PCI_D3cold, 0);
 140         /* wol sts read-clear */
 141         AT_READ_REG(hw, REG_WOL_CTRL, &data);
 142         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
 143
 144         /*
 145          * Mask some pcie error bits
 146          */
 147         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 148         if (pos) {
 149                 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
 150                 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
 151                 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
 152         }
 153         /* clear error status */
 154         pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
 155                         PCI_EXP_DEVSTA_NFED |
 156                         PCI_EXP_DEVSTA_FED |
 157                         PCI_EXP_DEVSTA_CED |
 158                         PCI_EXP_DEVSTA_URD);
 159
 160         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 161         data &= ~LTSSM_ID_EN_WRO;
 162         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 163
 164         atl1c_pcie_patch(hw);
 165         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 166                 atl1c_disable_l0s_l1(hw);
 167
 168         msleep(5);
 169 }
 170
 171 /**
 172  * atl1c_irq_enable - Enable default interrupt generation settings
 173  * @adapter: board private structure
 174  */
 175 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 176 {
 177         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 178                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 179                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 180                 AT_WRITE_FLUSH(&adapter->hw);
 181         }
 182 }
 183
 184 /**
 185  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 186  * @adapter: board private structure
 187  */
 188 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 189 {
 190         atomic_inc(&adapter->irq_sem);
 191         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 192         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 193         AT_WRITE_FLUSH(&adapter->hw);
 194         synchronize_irq(adapter->pdev->irq);
 195 }
 196
 197 /**
 198  * atl1c_irq_reset - reset interrupt confiure on the NIC
 199  * @adapter: board private structure
 200  */
 201 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 202 {
 203         atomic_set(&adapter->irq_sem, 1);
 204         atl1c_irq_enable(adapter);
 205 }
 206
 207 /*
 208  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 209  * of the idle status register until the device is actually idle
 210  */
 211 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
 212 {
 213         int timeout;
 214         u32 data;
 215
 216         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 217                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 218                 if ((data & modu_ctrl) == 0)
 219                         return 0;
 220                 msleep(1);
 221         }
 222         return data;
 223 }
 224
 225 /**
 226  * atl1c_phy_config - Timer Call-back
 227  * @data: pointer to netdev cast into an unsigned long
 228  */
 229 static void atl1c_phy_config(unsigned long data)
 230 {
 231         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 232         struct atl1c_hw *hw = &adapter->hw;
 233         unsigned long flags;
 234
 235         spin_lock_irqsave(&adapter->mdio_lock, flags);
 236         atl1c_restart_autoneg(hw);
 237         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 238 }
 239
 240 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 241 {
 242         WARN_ON(in_interrupt());
 243         atl1c_down(adapter);
 244         atl1c_up(adapter);
 245         clear_bit(__AT_RESETTING, &adapter->flags);
 246 }
 247
 248 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 249 {
 250         struct atl1c_hw *hw = &adapter->hw;
 251         struct net_device *netdev = adapter->netdev;
 252         struct pci_dev    *pdev   = adapter->pdev;
 253         int err;
 254         unsigned long flags;
 255         u16 speed, duplex, phy_data;
 256
 257         spin_lock_irqsave(&adapter->mdio_lock, flags);
 258         /* MII_BMSR must read twise */
 259         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 260         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 261         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 262
 263         if ((phy_data & BMSR_LSTATUS) == 0) {
 264                 /* link down */
 265                 netif_carrier_off(netdev);
 266                 hw->hibernate = true;
 267                 if (atl1c_reset_mac(hw) != 0)
 268                         if (netif_msg_hw(adapter))
 269                                 dev_warn(&pdev->dev, "reset mac failed\n");
 270                 atl1c_set_aspm(hw, SPEED_0);
 271                 atl1c_post_phy_linkchg(hw, SPEED_0);
 272                 atl1c_reset_dma_ring(adapter);
 273                 atl1c_configure(adapter);
 274         } else {
 275                 /* Link Up */
 276                 hw->hibernate = false;
 277                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 278                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 279                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 280                 if (unlikely(err))
 281                         return;
 282                 /* link result is our setting */
 283                 if (adapter->link_speed != speed ||
 284                     adapter->link_duplex != duplex) {
 285                         adapter->link_speed  = speed;
 286                         adapter->link_duplex = duplex;
 287                         atl1c_set_aspm(hw, speed);
 288                         atl1c_post_phy_linkchg(hw, speed);
 289                         atl1c_start_mac(adapter);
 290                         if (netif_msg_link(adapter))
 291                                 dev_info(&pdev->dev,
 292                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 293                                         atl1c_driver_name, netdev->name,
 294                                         adapter->link_speed,
 295                                         adapter->link_duplex == FULL_DUPLEX ?
 296                                         "Full Duplex" : "Half Duplex");
 297                 }
 298                 if (!netif_carrier_ok(netdev))
 299                         netif_carrier_on(netdev);
 300         }
 301 }
 302
 303 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 304 {
 305         struct net_device *netdev = adapter->netdev;
 306         struct pci_dev    *pdev   = adapter->pdev;
 307         u16 phy_data;
 308         u16 link_up;
 309
 310         spin_lock(&adapter->mdio_lock);
 311         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 312         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 313         spin_unlock(&adapter->mdio_lock);
 314         link_up = phy_data & BMSR_LSTATUS;
 315         /* notify upper layer link down ASAP */
 316         if (!link_up) {
 317                 if (netif_carrier_ok(netdev)) {
 318                         /* old link state: Up */
 319                         netif_carrier_off(netdev);
 320                         if (netif_msg_link(adapter))
 321                                 dev_info(&pdev->dev,
 322                                         "%s: %s NIC Link is Down\n",
 323                                         atl1c_driver_name, netdev->name);
 324                         adapter->link_speed = SPEED_0;
 325                 }
 326         }
 327
 328         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 329         schedule_work(&adapter->common_task);
 330 }
 331
 332 static void atl1c_common_task(struct work_struct *work)
 333 {
 334         struct atl1c_adapter *adapter;
 335         struct net_device *netdev;
 336
 337         adapter = container_of(work, struct atl1c_adapter, common_task);
 338         netdev = adapter->netdev;
 339
 340         if (test_bit(__AT_DOWN, &adapter->flags))
 341                 return;
 342
 343         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 344                 netif_device_detach(netdev);
 345                 atl1c_down(adapter);
 346                 atl1c_up(adapter);
 347                 netif_device_attach(netdev);
 348         }
 349
 350         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 351                 &adapter->work_event)) {
 352                 atl1c_irq_disable(adapter);
 353                 atl1c_check_link_status(adapter);
 354                 atl1c_irq_enable(adapter);
 355         }
 356 }
 357
 358
 359 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 360 {
 361         del_timer_sync(&adapter->phy_config_timer);
 362 }
 363
 364
 365 /**
 366  * atl1c_tx_timeout - Respond to a Tx Hang
 367  * @netdev: network interface device structure
 368  */
 369 static void atl1c_tx_timeout(struct net_device *netdev)
 370 {
 371         struct atl1c_adapter *adapter = netdev_priv(netdev);
 372
 373         /* Do the reset outside of interrupt context */
 374         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 375         schedule_work(&adapter->common_task);
 376 }
 377
 378 /**
 379  * atl1c_set_multi - Multicast and Promiscuous mode set
 380  * @netdev: network interface device structure
 381  *
 382  * The set_multi entry point is called whenever the multicast address
 383  * list or the network interface flags are updated.  This routine is
 384  * responsible for configuring the hardware for proper multicast,
 385  * promiscuous mode, and all-multi behavior.
 386  */
 387 static void atl1c_set_multi(struct net_device *netdev)
 388 {
 389         struct atl1c_adapter *adapter = netdev_priv(netdev);
 390         struct atl1c_hw *hw = &adapter->hw;
 391         struct netdev_hw_addr *ha;
 392         u32 mac_ctrl_data;
 393         u32 hash_value;
 394
 395         /* Check for Promiscuous and All Multicast modes */
 396         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 397
 398         if (netdev->flags & IFF_PROMISC) {
 399                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 400         } else if (netdev->flags & IFF_ALLMULTI) {
 401                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 402                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 403         } else {
 404                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 405         }
 406
 407         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 408
 409         /* clear the old settings from the multicast hash table */
 410         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 411         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 412
 413         /* comoute mc addresses' hash value ,and put it into hash table */
 414         netdev_for_each_mc_addr(ha, netdev) {
 415                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 416                 atl1c_hash_set(hw, hash_value);
 417         }
 418 }
 419
 420 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 421 {
 422         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 423                 /* enable VLAN tag insert/strip */
 424                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 425         } else {
 426                 /* disable VLAN tag insert/strip */
 427                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 428         }
 429 }
 430
 431 static void atl1c_vlan_mode(struct net_device *netdev,
 432         netdev_features_t features)
 433 {
 434         struct atl1c_adapter *adapter = netdev_priv(netdev);
 435         struct pci_dev *pdev = adapter->pdev;
 436         u32 mac_ctrl_data = 0;
 437
 438         if (netif_msg_pktdata(adapter))
 439                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 440
 441         atl1c_irq_disable(adapter);
 442         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 443         __atl1c_vlan_mode(features, &mac_ctrl_data);
 444         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 445         atl1c_irq_enable(adapter);
 446 }
 447
 448 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 449 {
 450         struct pci_dev *pdev = adapter->pdev;
 451
 452         if (netif_msg_pktdata(adapter))
 453                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 454         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 455 }
 456
 457 /**
 458  * atl1c_set_mac - Change the Ethernet Address of the NIC
 459  * @netdev: network interface device structure
 460  * @p: pointer to an address structure
 461  *
 462  * Returns 0 on success, negative on failure
 463  */
 464 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 465 {
 466         struct atl1c_adapter *adapter = netdev_priv(netdev);
 467         struct sockaddr *addr = p;
 468
 469         if (!is_valid_ether_addr(addr->sa_data))
 470                 return -EADDRNOTAVAIL;
 471
 472         if (netif_running(netdev))
 473                 return -EBUSY;
 474
 475         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 476         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 477
 478         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
 479
 480         return 0;
 481 }
 482
 483 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 484                                 struct net_device *dev)
 485 {
 486         unsigned int head_size;
 487         int mtu = dev->mtu;
 488
 489         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 490                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 491
 492         head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) +
 493                     SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 494         adapter->rx_frag_size = roundup_pow_of_two(head_size);
 495 }
 496
 497 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 498         netdev_features_t features)
 499 {
 500         /*
 501          * Since there is no support for separate rx/tx vlan accel
 502          * enable/disable make sure tx flag is always in same state as rx.
 503          */
 504         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 505                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 506         else
 507                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 508
 509         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 510                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 511
 512         return features;
 513 }
 514
 515 static int atl1c_set_features(struct net_device *netdev,
 516         netdev_features_t features)
 517 {
 518         netdev_features_t changed = netdev->features ^ features;
 519
 520         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 521                 atl1c_vlan_mode(netdev, features);
 522
 523         return 0;
 524 }
 525
 526 /**
 527  * atl1c_change_mtu - Change the Maximum Transfer Unit
 528  * @netdev: network interface device structure
 529  * @new_mtu: new value for maximum frame size
 530  *
 531  * Returns 0 on success, negative on failure
 532  */
 533 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 534 {
 535         struct atl1c_adapter *adapter = netdev_priv(netdev);
 536         struct atl1c_hw *hw = &adapter->hw;
 537         int old_mtu   = netdev->mtu;
 538         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 539
 540         /* Fast Ethernet controller doesn't support jumbo packet */
 541         if (((hw->nic_type == athr_l2c ||
 542               hw->nic_type == athr_l2c_b ||
 543               hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
 544               max_frame < ETH_ZLEN + ETH_FCS_LEN ||
 545               max_frame > MAX_JUMBO_FRAME_SIZE) {
 546                 if (netif_msg_link(adapter))
 547                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 548                 return -EINVAL;
 549         }
 550         /* set MTU */
 551         if (old_mtu != new_mtu && netif_running(netdev)) {
 552                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 553                         msleep(1);
 554                 netdev->mtu = new_mtu;
 555                 adapter->hw.max_frame_size = new_mtu;
 556                 atl1c_set_rxbufsize(adapter, netdev);
 557                 atl1c_down(adapter);
 558                 netdev_update_features(netdev);
 559                 atl1c_up(adapter);
 560                 clear_bit(__AT_RESETTING, &adapter->flags);
 561         }
 562         return 0;
 563 }
 564
 565 /*
 566  *  caller should hold mdio_lock
 567  */
 568 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 569 {
 570         struct atl1c_adapter *adapter = netdev_priv(netdev);
 571         u16 result;
 572
 573         atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
 574         return result;
 575 }
 576
 577 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 578                              int reg_num, int val)
 579 {
 580         struct atl1c_adapter *adapter = netdev_priv(netdev);
 581
 582         atl1c_write_phy_reg(&adapter->hw, reg_num, val);
 583 }
 584
 585 static int atl1c_mii_ioctl(struct net_device *netdev,
 586                            struct ifreq *ifr, int cmd)
 587 {
 588         struct atl1c_adapter *adapter = netdev_priv(netdev);
 589         struct pci_dev *pdev = adapter->pdev;
 590         struct mii_ioctl_data *data = if_mii(ifr);
 591         unsigned long flags;
 592         int retval = 0;
 593
 594         if (!netif_running(netdev))
 595                 return -EINVAL;
 596
 597         spin_lock_irqsave(&adapter->mdio_lock, flags);
 598         switch (cmd) {
 599         case SIOCGMIIPHY:
 600                 data->phy_id = 0;
 601                 break;
 602
 603         case SIOCGMIIREG:
 604                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 605                                     &data->val_out)) {
 606                         retval = -EIO;
 607                         goto out;
 608                 }
 609                 break;
 610
 611         case SIOCSMIIREG:
 612                 if (data->reg_num & ~(0x1F)) {
 613                         retval = -EFAULT;
 614                         goto out;
 615                 }
 616
 617                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 618                                 data->reg_num, data->val_in);
 619                 if (atl1c_write_phy_reg(&adapter->hw,
 620                                      data->reg_num, data->val_in)) {
 621                         retval = -EIO;
 622                         goto out;
 623                 }
 624                 break;
 625
 626         default:
 627                 retval = -EOPNOTSUPP;
 628                 break;
 629         }
 630 out:
 631         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 632         return retval;
 633 }
 634
 635 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 636 {
 637         switch (cmd) {
 638         case SIOCGMIIPHY:
 639         case SIOCGMIIREG:
 640         case SIOCSMIIREG:
 641                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 642         default:
 643                 return -EOPNOTSUPP;
 644         }
 645 }
 646
 647 /**
 648  * atl1c_alloc_queues - Allocate memory for all rings
 649  * @adapter: board private structure to initialize
 650  *
 651  */
 652 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
 653 {
 654         return 0;
 655 }
 656
 657 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 658 {
 659         switch (hw->device_id) {
 660         case PCI_DEVICE_ID_ATTANSIC_L2C:
 661                 hw->nic_type = athr_l2c;
 662                 break;
 663         case PCI_DEVICE_ID_ATTANSIC_L1C:
 664                 hw->nic_type = athr_l1c;
 665                 break;
 666         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 667                 hw->nic_type = athr_l2c_b;
 668                 break;
 669         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 670                 hw->nic_type = athr_l2c_b2;
 671                 break;
 672         case PCI_DEVICE_ID_ATHEROS_L1D:
 673                 hw->nic_type = athr_l1d;
 674                 break;
 675         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 676                 hw->nic_type = athr_l1d_2;
 677                 break;
 678         default:
 679                 break;
 680         }
 681 }
 682
 683 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 684 {
 685         u32 link_ctrl_data;
 686
 687         atl1c_set_mac_type(hw);
 688         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 689
 690         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 691                          ATL1C_TXQ_MODE_ENHANCE;
 692         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 693                           ATL1C_ASPM_L1_SUPPORT;
 694         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 695
 696         if (hw->nic_type == athr_l1c ||
 697             hw->nic_type == athr_l1d ||
 698             hw->nic_type == athr_l1d_2)
 699                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 700         return 0;
 701 }
 702
 703 struct atl1c_platform_patch {
 704         u16 pci_did;
 705         u8  pci_revid;
 706         u16 subsystem_vid;
 707         u16 subsystem_did;
 708         u32 patch_flag;
 709 #define ATL1C_LINK_PATCH        0x1
 710 };
 711 static const struct atl1c_platform_patch plats[] = {
 712 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
 713 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
 714 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
 715 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
 716 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
 717 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
 718 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
 719 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
 720 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
 721 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
 722 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
 723 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
 724 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
 725 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
 726 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
 727 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
 728 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
 729 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
 730 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
 731 {0},
 732 };
 733
 734 static void atl1c_patch_assign(struct atl1c_hw *hw)
 735 {
 736         struct pci_dev  *pdev = hw->adapter->pdev;
 737         u32 misc_ctrl;
 738         int i = 0;
 739
 740         hw->msi_lnkpatch = false;
 741
 742         while (plats[i].pci_did != 0) {
 743                 if (plats[i].pci_did == hw->device_id &&
 744                     plats[i].pci_revid == hw->revision_id &&
 745                     plats[i].subsystem_vid == hw->subsystem_vendor_id &&
 746                     plats[i].subsystem_did == hw->subsystem_id) {
 747                         if (plats[i].patch_flag & ATL1C_LINK_PATCH)
 748                                 hw->msi_lnkpatch = true;
 749                 }
 750                 i++;
 751         }
 752
 753         if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
 754             hw->revision_id == L2CB_V21) {
 755                 /* config acess mode */
 756                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 757                                        REG_PCIE_DEV_MISC_CTRL);
 758                 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
 759                 misc_ctrl &= ~0x100;
 760                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 761                                        REG_PCIE_DEV_MISC_CTRL);
 762                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
 763         }
 764 }
 765 /**
 766  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 767  * @adapter: board private structure to initialize
 768  *
 769  * atl1c_sw_init initializes the Adapter private data structure.
 770  * Fields are initialized based on PCI device information and
 771  * OS network device settings (MTU size).
 772  */
 773 static int atl1c_sw_init(struct atl1c_adapter *adapter)
 774 {
 775         struct atl1c_hw *hw   = &adapter->hw;
 776         struct pci_dev  *pdev = adapter->pdev;
 777         u32 revision;
 778
 779
 780         adapter->wol = 0;
 781         device_set_wakeup_enable(&pdev->dev, false);
 782         adapter->link_speed = SPEED_0;
 783         adapter->link_duplex = FULL_DUPLEX;
 784         adapter->tpd_ring[0].count = 1024;
 785         adapter->rfd_ring.count = 512;
 786
 787         hw->vendor_id = pdev->vendor;
 788         hw->device_id = pdev->device;
 789         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 790         hw->subsystem_id = pdev->subsystem_device;
 791         pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
 792         hw->revision_id = revision & 0xFF;
 793         /* before link up, we assume hibernate is true */
 794         hw->hibernate = true;
 795         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 796         if (atl1c_setup_mac_funcs(hw) != 0) {
 797                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 798                 return -1;
 799         }
 800         atl1c_patch_assign(hw);
 801
 802         hw->intr_mask = IMR_NORMAL_MASK;
 803         hw->phy_configured = false;
 804         hw->preamble_len = 7;
 805         hw->max_frame_size = adapter->netdev->mtu;
 806         hw->autoneg_advertised = ADVERTISED_Autoneg;
 807         hw->indirect_tab = 0xE4E4E4E4;
 808         hw->base_cpu = 0;
 809
 810         hw->ict = 50000;                /* 100ms */
 811         hw->smb_timer = 200000;         /* 400ms */
 812         hw->rx_imt = 200;
 813         hw->tx_imt = 1000;
 814
 815         hw->tpd_burst = 5;
 816         hw->rfd_burst = 8;
 817         hw->dma_order = atl1c_dma_ord_out;
 818         hw->dmar_block = atl1c_dma_req_1024;
 819
 820         if (atl1c_alloc_queues(adapter)) {
 821                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 822                 return -ENOMEM;
 823         }
 824         /* TODO */
 825         atl1c_set_rxbufsize(adapter, adapter->netdev);
 826         atomic_set(&adapter->irq_sem, 1);
 827         spin_lock_init(&adapter->mdio_lock);
 828         spin_lock_init(&adapter->tx_lock);
 829         set_bit(__AT_DOWN, &adapter->flags);
 830
 831         return 0;
 832 }
 833
 834 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 835                                 struct atl1c_buffer *buffer_info, int in_irq)
 836 {
 837         u16 pci_driection;
 838         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 839                 return;
 840         if (buffer_info->dma) {
 841                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 842                         pci_driection = PCI_DMA_FROMDEVICE;
 843                 else
 844                         pci_driection = PCI_DMA_TODEVICE;
 845
 846                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 847                         pci_unmap_single(pdev, buffer_info->dma,
 848                                         buffer_info->length, pci_driection);
 849                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 850                         pci_unmap_page(pdev, buffer_info->dma,
 851                                         buffer_info->length, pci_driection);
 852         }
 853         if (buffer_info->skb) {
 854                 if (in_irq)
 855                         dev_kfree_skb_irq(buffer_info->skb);
 856                 else
 857                         dev_kfree_skb(buffer_info->skb);
 858         }
 859         buffer_info->dma = 0;
 860         buffer_info->skb = NULL;
 861         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 862 }
 863 /**
 864  * atl1c_clean_tx_ring - Free Tx-skb
 865  * @adapter: board private structure
 866  */
 867 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 868                                 enum atl1c_trans_queue type)
 869 {
 870         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 871         struct atl1c_buffer *buffer_info;
 872         struct pci_dev *pdev = adapter->pdev;
 873         u16 index, ring_count;
 874
 875         ring_count = tpd_ring->count;
 876         for (index = 0; index < ring_count; index++) {
 877                 buffer_info = &tpd_ring->buffer_info[index];
 878                 atl1c_clean_buffer(pdev, buffer_info, 0);
 879         }
 880
 881         /* Zero out Tx-buffers */
 882         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 883                 ring_count);
 884         atomic_set(&tpd_ring->next_to_clean, 0);
 885         tpd_ring->next_to_use = 0;
 886 }
 887
 888 /**
 889  * atl1c_clean_rx_ring - Free rx-reservation skbs
 890  * @adapter: board private structure
 891  */
 892 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 893 {
 894         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 895         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 896         struct atl1c_buffer *buffer_info;
 897         struct pci_dev *pdev = adapter->pdev;
 898         int j;
 899
 900         for (j = 0; j < rfd_ring->count; j++) {
 901                 buffer_info = &rfd_ring->buffer_info[j];
 902                 atl1c_clean_buffer(pdev, buffer_info, 0);
 903         }
 904         /* zero out the descriptor ring */
 905         memset(rfd_ring->desc, 0, rfd_ring->size);
 906         rfd_ring->next_to_clean = 0;
 907         rfd_ring->next_to_use = 0;
 908         rrd_ring->next_to_use = 0;
 909         rrd_ring->next_to_clean = 0;
 910 }
 911
 912 /*
 913  * Read / Write Ptr Initialize:
 914  */
 915 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 916 {
 917         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 918         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 919         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 920         struct atl1c_buffer *buffer_info;
 921         int i, j;
 922
 923         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 924                 tpd_ring[i].next_to_use = 0;
 925                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 926                 buffer_info = tpd_ring[i].buffer_info;
 927                 for (j = 0; j < tpd_ring->count; j++)
 928                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 929                                         ATL1C_BUFFER_FREE);
 930         }
 931         rfd_ring->next_to_use = 0;
 932         rfd_ring->next_to_clean = 0;
 933         rrd_ring->next_to_use = 0;
 934         rrd_ring->next_to_clean = 0;
 935         for (j = 0; j < rfd_ring->count; j++) {
 936                 buffer_info = &rfd_ring->buffer_info[j];
 937                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 938         }
 939 }
 940
 941 /**
 942  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 943  * @adapter: board private structure
 944  *
 945  * Free all transmit software resources
 946  */
 947 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 948 {
 949         struct pci_dev *pdev = adapter->pdev;
 950
 951         pci_free_consistent(pdev, adapter->ring_header.size,
 952                                         adapter->ring_header.desc,
 953                                         adapter->ring_header.dma);
 954         adapter->ring_header.desc = NULL;
 955
 956         /* Note: just free tdp_ring.buffer_info,
 957         *  it contain rfd_ring.buffer_info, do not double free */
 958         if (adapter->tpd_ring[0].buffer_info) {
 959                 kfree(adapter->tpd_ring[0].buffer_info);
 960                 adapter->tpd_ring[0].buffer_info = NULL;
 961         }
 962         if (adapter->rx_page) {
 963                 put_page(adapter->rx_page);
 964                 adapter->rx_page = NULL;
 965         }
 966 }
 967
 968 /**
 969  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 970  * @adapter: board private structure
 971  *
 972  * Return 0 on success, negative on failure
 973  */
 974 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 975 {
 976         struct pci_dev *pdev = adapter->pdev;
 977         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 978         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 979         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 980         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 981         int size;
 982         int i;
 983         int count = 0;
 984         int rx_desc_count = 0;
 985         u32 offset = 0;
 986
 987         rrd_ring->count = rfd_ring->count;
 988         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 989                 tpd_ring[i].count = tpd_ring[0].count;
 990
 991         /* 2 tpd queue, one high priority queue,
 992          * another normal priority queue */
 993         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 994                 rfd_ring->count);
 995         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 996         if (unlikely(!tpd_ring->buffer_info))
 997                 goto err_nomem;
 998
 999         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1000                 tpd_ring[i].buffer_info =
1001                         (tpd_ring->buffer_info + count);
1002                 count += tpd_ring[i].count;
1003         }
1004
1005         rfd_ring->buffer_info =
1006                 (tpd_ring->buffer_info + count);
1007         count += rfd_ring->count;
1008         rx_desc_count += rfd_ring->count;
1009
1010         /*
1011          * real ring DMA buffer
1012          * each ring/block may need up to 8 bytes for alignment, hence the
1013          * additional bytes tacked onto the end.
1014          */
1015         ring_header->size = size =
1016                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1017                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1018                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1019                 8 * 4;
1020
1021         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1022                                 &ring_header->dma);
1023         if (unlikely(!ring_header->desc)) {
1024                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1025                 goto err_nomem;
1026         }
1027         memset(ring_header->desc, 0, ring_header->size);
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_packets = hw_stats->rx_ok;
1504         net_stats->tx_packets = hw_stats->tx_ok;
1505         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1506         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1507         net_stats->multicast  = hw_stats->rx_mcast;
1508         net_stats->collisions = hw_stats->tx_1_col +
1509                                 hw_stats->tx_2_col * 2 +
1510                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1511         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1512                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1513                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1514         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1515         net_stats->rx_length_errors = hw_stats->rx_len_err;
1516         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1517         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1518         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1519
1520         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1521
1522         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1523                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1524         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1525         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1526         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1527
1528         return net_stats;
1529 }
1530
1531 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1532 {
1533         u16 phy_data;
1534
1535         spin_lock(&adapter->mdio_lock);
1536         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1537         spin_unlock(&adapter->mdio_lock);
1538 }
1539
1540 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1541                                 enum atl1c_trans_queue type)
1542 {
1543         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1544         struct atl1c_buffer *buffer_info;
1545         struct pci_dev *pdev = adapter->pdev;
1546         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1547         u16 hw_next_to_clean;
1548         u16 reg;
1549
1550         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1551
1552         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1553
1554         while (next_to_clean != hw_next_to_clean) {
1555                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1556                 atl1c_clean_buffer(pdev, buffer_info, 1);
1557                 if (++next_to_clean == tpd_ring->count)
1558                         next_to_clean = 0;
1559                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1560         }
1561
1562         if (netif_queue_stopped(adapter->netdev) &&
1563                         netif_carrier_ok(adapter->netdev)) {
1564                 netif_wake_queue(adapter->netdev);
1565         }
1566
1567         return true;
1568 }
1569
1570 /**
1571  * atl1c_intr - Interrupt Handler
1572  * @irq: interrupt number
1573  * @data: pointer to a network interface device structure
1574  */
1575 static irqreturn_t atl1c_intr(int irq, void *data)
1576 {
1577         struct net_device *netdev  = data;
1578         struct atl1c_adapter *adapter = netdev_priv(netdev);
1579         struct pci_dev *pdev = adapter->pdev;
1580         struct atl1c_hw *hw = &adapter->hw;
1581         int max_ints = AT_MAX_INT_WORK;
1582         int handled = IRQ_NONE;
1583         u32 status;
1584         u32 reg_data;
1585
1586         do {
1587                 AT_READ_REG(hw, REG_ISR, &reg_data);
1588                 status = reg_data & hw->intr_mask;
1589
1590                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1591                         if (max_ints != AT_MAX_INT_WORK)
1592                                 handled = IRQ_HANDLED;
1593                         break;
1594                 }
1595                 /* link event */
1596                 if (status & ISR_GPHY)
1597                         atl1c_clear_phy_int(adapter);
1598                 /* Ack ISR */
1599                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1600                 if (status & ISR_RX_PKT) {
1601                         if (likely(napi_schedule_prep(&adapter->napi))) {
1602                                 hw->intr_mask &= ~ISR_RX_PKT;
1603                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1604                                 __napi_schedule(&adapter->napi);
1605                         }
1606                 }
1607                 if (status & ISR_TX_PKT)
1608                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1609
1610                 handled = IRQ_HANDLED;
1611                 /* check if PCIE PHY Link down */
1612                 if (status & ISR_ERROR) {
1613                         if (netif_msg_hw(adapter))
1614                                 dev_err(&pdev->dev,
1615                                         "atl1c hardware error (status = 0x%x)\n",
1616                                         status & ISR_ERROR);
1617                         /* reset MAC */
1618                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1619                         schedule_work(&adapter->common_task);
1620                         return IRQ_HANDLED;
1621                 }
1622
1623                 if (status & ISR_OVER)
1624                         if (netif_msg_intr(adapter))
1625                                 dev_warn(&pdev->dev,
1626                                         "TX/RX overflow (status = 0x%x)\n",
1627                                         status & ISR_OVER);
1628
1629                 /* link event */
1630                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1631                         netdev->stats.tx_carrier_errors++;
1632                         atl1c_link_chg_event(adapter);
1633                         break;
1634                 }
1635
1636         } while (--max_ints > 0);
1637         /* re-enable Interrupt*/
1638         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1639         return handled;
1640 }
1641
1642 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1643                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1644 {
1645         /*
1646          * The pid field in RRS in not correct sometimes, so we
1647          * cannot figure out if the packet is fragmented or not,
1648          * so we tell the KERNEL CHECKSUM_NONE
1649          */
1650         skb_checksum_none_assert(skb);
1651 }
1652
1653 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1654 {
1655         struct sk_buff *skb;
1656         struct page *page;
1657
1658         if (adapter->rx_frag_size > PAGE_SIZE)
1659                 return netdev_alloc_skb(adapter->netdev,
1660                                         adapter->rx_buffer_len);
1661
1662         page = adapter->rx_page;
1663         if (!page) {
1664                 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1665                 if (unlikely(!page))
1666                         return NULL;
1667                 adapter->rx_page_offset = 0;
1668         }
1669
1670         skb = build_skb(page_address(page) + adapter->rx_page_offset,
1671                         adapter->rx_frag_size);
1672         if (likely(skb)) {
1673                 adapter->rx_page_offset += adapter->rx_frag_size;
1674                 if (adapter->rx_page_offset >= PAGE_SIZE)
1675                         adapter->rx_page = NULL;
1676                 else
1677                         get_page(page);
1678         }
1679         return skb;
1680 }
1681
1682 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1683 {
1684         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1685         struct pci_dev *pdev = adapter->pdev;
1686         struct atl1c_buffer *buffer_info, *next_info;
1687         struct sk_buff *skb;
1688         void *vir_addr = NULL;
1689         u16 num_alloc = 0;
1690         u16 rfd_next_to_use, next_next;
1691         struct atl1c_rx_free_desc *rfd_desc;
1692         dma_addr_t mapping;
1693
1694         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1695         if (++next_next == rfd_ring->count)
1696                 next_next = 0;
1697         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1698         next_info = &rfd_ring->buffer_info[next_next];
1699
1700         while (next_info->flags & ATL1C_BUFFER_FREE) {
1701                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1702
1703                 skb = atl1c_alloc_skb(adapter);
1704                 if (unlikely(!skb)) {
1705                         if (netif_msg_rx_err(adapter))
1706                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1707                         break;
1708                 }
1709
1710                 /*
1711                  * Make buffer alignment 2 beyond a 16 byte boundary
1712                  * this will result in a 16 byte aligned IP header after
1713                  * the 14 byte MAC header is removed
1714                  */
1715                 vir_addr = skb->data;
1716                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1717                 buffer_info->skb = skb;
1718                 buffer_info->length = adapter->rx_buffer_len;
1719                 mapping = pci_map_single(pdev, vir_addr,
1720                                                 buffer_info->length,
1721                                                 PCI_DMA_FROMDEVICE);
1722                 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1723                         dev_kfree_skb(skb);
1724                         buffer_info->skb = NULL;
1725                         buffer_info->length = 0;
1726                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1727                         netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1728                         break;
1729                 }
1730                 buffer_info->dma = mapping;
1731                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1732                         ATL1C_PCIMAP_FROMDEVICE);
1733                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1734                 rfd_next_to_use = next_next;
1735                 if (++next_next == rfd_ring->count)
1736                         next_next = 0;
1737                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1738                 next_info = &rfd_ring->buffer_info[next_next];
1739                 num_alloc++;
1740         }
1741
1742         if (num_alloc) {
1743                 /* TODO: update mailbox here */
1744                 wmb();
1745                 rfd_ring->next_to_use = rfd_next_to_use;
1746                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1747                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1748         }
1749
1750         return num_alloc;
1751 }
1752
1753 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1754                         struct  atl1c_recv_ret_status *rrs, u16 num)
1755 {
1756         u16 i;
1757         /* the relationship between rrd and rfd is one map one */
1758         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1759                                         rrd_ring->next_to_clean)) {
1760                 rrs->word3 &= ~RRS_RXD_UPDATED;
1761                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1762                         rrd_ring->next_to_clean = 0;
1763         }
1764 }
1765
1766 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1767         struct atl1c_recv_ret_status *rrs, u16 num)
1768 {
1769         u16 i;
1770         u16 rfd_index;
1771         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1772
1773         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1774                         RRS_RX_RFD_INDEX_MASK;
1775         for (i = 0; i < num; i++) {
1776                 buffer_info[rfd_index].skb = NULL;
1777                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1778                                         ATL1C_BUFFER_FREE);
1779                 if (++rfd_index == rfd_ring->count)
1780                         rfd_index = 0;
1781         }
1782         rfd_ring->next_to_clean = rfd_index;
1783 }
1784
1785 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1786                    int *work_done, int work_to_do)
1787 {
1788         u16 rfd_num, rfd_index;
1789         u16 count = 0;
1790         u16 length;
1791         struct pci_dev *pdev = adapter->pdev;
1792         struct net_device *netdev  = adapter->netdev;
1793         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1794         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1795         struct sk_buff *skb;
1796         struct atl1c_recv_ret_status *rrs;
1797         struct atl1c_buffer *buffer_info;
1798
1799         while (1) {
1800                 if (*work_done >= work_to_do)
1801                         break;
1802                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1803                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1804                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1805                                 RRS_RX_RFD_CNT_MASK;
1806                         if (unlikely(rfd_num != 1))
1807                                 /* TODO support mul rfd*/
1808                                 if (netif_msg_rx_err(adapter))
1809                                         dev_warn(&pdev->dev,
1810                                                 "Multi rfd not support yet!\n");
1811                         goto rrs_checked;
1812                 } else {
1813                         break;
1814                 }
1815 rrs_checked:
1816                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1817                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1818                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1819                                 if (netif_msg_rx_err(adapter))
1820                                         dev_warn(&pdev->dev,
1821                                                 "wrong packet! rrs word3 is %x\n",
1822                                                 rrs->word3);
1823                         continue;
1824                 }
1825
1826                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1827                                 RRS_PKT_SIZE_MASK);
1828                 /* Good Receive */
1829                 if (likely(rfd_num == 1)) {
1830                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1831                                         RRS_RX_RFD_INDEX_MASK;
1832                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1833                         pci_unmap_single(pdev, buffer_info->dma,
1834                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1835                         skb = buffer_info->skb;
1836                 } else {
1837                         /* TODO */
1838                         if (netif_msg_rx_err(adapter))
1839                                 dev_warn(&pdev->dev,
1840                                         "Multi rfd not support yet!\n");
1841                         break;
1842                 }
1843                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1844                 skb_put(skb, length - ETH_FCS_LEN);
1845                 skb->protocol = eth_type_trans(skb, netdev);
1846                 atl1c_rx_checksum(adapter, skb, rrs);
1847                 if (rrs->word3 & RRS_VLAN_INS) {
1848                         u16 vlan;
1849
1850                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1851                         vlan = le16_to_cpu(vlan);
1852                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1853                 }
1854                 netif_receive_skb(skb);
1855
1856                 (*work_done)++;
1857                 count++;
1858         }
1859         if (count)
1860                 atl1c_alloc_rx_buffer(adapter);
1861 }
1862
1863 /**
1864  * atl1c_clean - NAPI Rx polling callback
1865  */
1866 static int atl1c_clean(struct napi_struct *napi, int budget)
1867 {
1868         struct atl1c_adapter *adapter =
1869                         container_of(napi, struct atl1c_adapter, napi);
1870         int work_done = 0;
1871
1872         /* Keep link state information with original netdev */
1873         if (!netif_carrier_ok(adapter->netdev))
1874                 goto quit_polling;
1875         /* just enable one RXQ */
1876         atl1c_clean_rx_irq(adapter, &work_done, budget);
1877
1878         if (work_done < budget) {
1879 quit_polling:
1880                 napi_complete(napi);
1881                 adapter->hw.intr_mask |= ISR_RX_PKT;
1882                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1883         }
1884         return work_done;
1885 }
1886
1887 #ifdef CONFIG_NET_POLL_CONTROLLER
1888
1889 /*
1890  * Polling 'interrupt' - used by things like netconsole to send skbs
1891  * without having to re-enable interrupts. It's not called while
1892  * the interrupt routine is executing.
1893  */
1894 static void atl1c_netpoll(struct net_device *netdev)
1895 {
1896         struct atl1c_adapter *adapter = netdev_priv(netdev);
1897
1898         disable_irq(adapter->pdev->irq);
1899         atl1c_intr(adapter->pdev->irq, netdev);
1900         enable_irq(adapter->pdev->irq);
1901 }
1902 #endif
1903
1904 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1905 {
1906         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1907         u16 next_to_use = 0;
1908         u16 next_to_clean = 0;
1909
1910         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1911         next_to_use   = tpd_ring->next_to_use;
1912
1913         return (u16)(next_to_clean > next_to_use) ?
1914                 (next_to_clean - next_to_use - 1) :
1915                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1916 }
1917
1918 /*
1919  * get next usable tpd
1920  * Note: should call atl1c_tdp_avail to make sure
1921  * there is enough tpd to use
1922  */
1923 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1924         enum atl1c_trans_queue type)
1925 {
1926         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1927         struct atl1c_tpd_desc *tpd_desc;
1928         u16 next_to_use = 0;
1929
1930         next_to_use = tpd_ring->next_to_use;
1931         if (++tpd_ring->next_to_use == tpd_ring->count)
1932                 tpd_ring->next_to_use = 0;
1933         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1934         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1935         return  tpd_desc;
1936 }
1937
1938 static struct atl1c_buffer *
1939 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1940 {
1941         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1942
1943         return &tpd_ring->buffer_info[tpd -
1944                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1945 }
1946
1947 /* Calculate the transmit packet descript needed*/
1948 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1949 {
1950         u16 tpd_req;
1951         u16 proto_hdr_len = 0;
1952
1953         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1954
1955         if (skb_is_gso(skb)) {
1956                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1957                 if (proto_hdr_len < skb_headlen(skb))
1958                         tpd_req++;
1959                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1960                         tpd_req++;
1961         }
1962         return tpd_req;
1963 }
1964
1965 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1966                           struct sk_buff *skb,
1967                           struct atl1c_tpd_desc **tpd,
1968                           enum atl1c_trans_queue type)
1969 {
1970         struct pci_dev *pdev = adapter->pdev;
1971         u8 hdr_len;
1972         u32 real_len;
1973         unsigned short offload_type;
1974         int err;
1975
1976         if (skb_is_gso(skb)) {
1977                 if (skb_header_cloned(skb)) {
1978                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1979                         if (unlikely(err))
1980                                 return -1;
1981                 }
1982                 offload_type = skb_shinfo(skb)->gso_type;
1983
1984                 if (offload_type & SKB_GSO_TCPV4) {
1985                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1986                                         + ntohs(ip_hdr(skb)->tot_len));
1987
1988                         if (real_len < skb->len)
1989                                 pskb_trim(skb, real_len);
1990
1991                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1992                         if (unlikely(skb->len == hdr_len)) {
1993                                 /* only xsum need */
1994                                 if (netif_msg_tx_queued(adapter))
1995                                         dev_warn(&pdev->dev,
1996                                                 "IPV4 tso with zero data??\n");
1997                                 goto check_sum;
1998                         } else {
1999                                 ip_hdr(skb)->check = 0;
2000                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2001                                                         ip_hdr(skb)->saddr,
2002                                                         ip_hdr(skb)->daddr,
2003                                                         0, IPPROTO_TCP, 0);
2004                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2005                         }
2006                 }
2007
2008                 if (offload_type & SKB_GSO_TCPV6) {
2009                         struct atl1c_tpd_ext_desc *etpd =
2010                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2011
2012                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2013                         *tpd = atl1c_get_tpd(adapter, type);
2014                         ipv6_hdr(skb)->payload_len = 0;
2015                         /* check payload == 0 byte ? */
2016                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2017                         if (unlikely(skb->len == hdr_len)) {
2018                                 /* only xsum need */
2019                                 if (netif_msg_tx_queued(adapter))
2020                                         dev_warn(&pdev->dev,
2021                                                 "IPV6 tso with zero data??\n");
2022                                 goto check_sum;
2023                         } else
2024                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2025                                                 &ipv6_hdr(skb)->saddr,
2026                                                 &ipv6_hdr(skb)->daddr,
2027                                                 0, IPPROTO_TCP, 0);
2028                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2029                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2030                         etpd->pkt_len = cpu_to_le32(skb->len);
2031                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2032                 }
2033
2034                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2035                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2036                                 TPD_TCPHDR_OFFSET_SHIFT;
2037                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2038                                 TPD_MSS_SHIFT;
2039                 return 0;
2040         }
2041
2042 check_sum:
2043         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2044                 u8 css, cso;
2045                 cso = skb_checksum_start_offset(skb);
2046
2047                 if (unlikely(cso & 0x1)) {
2048                         if (netif_msg_tx_err(adapter))
2049                                 dev_err(&adapter->pdev->dev,
2050                                         "payload offset should not an event number\n");
2051                         return -1;
2052                 } else {
2053                         css = cso + skb->csum_offset;
2054
2055                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2056                                         TPD_PLOADOFFSET_SHIFT;
2057                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2058                                         TPD_CCSUM_OFFSET_SHIFT;
2059                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2060                 }
2061         }
2062         return 0;
2063 }
2064
2065 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2066                               struct atl1c_tpd_desc *first_tpd,
2067                               enum atl1c_trans_queue type)
2068 {
2069         struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2070         struct atl1c_buffer *buffer_info;
2071         struct atl1c_tpd_desc *tpd;
2072         u16 first_index, index;
2073
2074         first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2075         index = first_index;
2076         while (index != tpd_ring->next_to_use) {
2077                 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2078                 buffer_info = &tpd_ring->buffer_info[index];
2079                 atl1c_clean_buffer(adpt->pdev, buffer_info, 0);
2080                 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2081                 if (++index == tpd_ring->count)
2082                         index = 0;
2083         }
2084         tpd_ring->next_to_use = first_index;
2085 }
2086
2087 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2088                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2089                         enum atl1c_trans_queue type)
2090 {
2091         struct atl1c_tpd_desc *use_tpd = NULL;
2092         struct atl1c_buffer *buffer_info = NULL;
2093         u16 buf_len = skb_headlen(skb);
2094         u16 map_len = 0;
2095         u16 mapped_len = 0;
2096         u16 hdr_len = 0;
2097         u16 nr_frags;
2098         u16 f;
2099         int tso;
2100
2101         nr_frags = skb_shinfo(skb)->nr_frags;
2102         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2103         if (tso) {
2104                 /* TSO */
2105                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2106                 use_tpd = tpd;
2107
2108                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2109                 buffer_info->length = map_len;
2110                 buffer_info->dma = pci_map_single(adapter->pdev,
2111                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2112                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2113                                                    buffer_info->dma)))
2114                         goto err_dma;
2115                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2116                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2117                         ATL1C_PCIMAP_TODEVICE);
2118                 mapped_len += map_len;
2119                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2120                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2121         }
2122
2123         if (mapped_len < buf_len) {
2124                 /* mapped_len == 0, means we should use the first tpd,
2125                    which is given by caller  */
2126                 if (mapped_len == 0)
2127                         use_tpd = tpd;
2128                 else {
2129                         use_tpd = atl1c_get_tpd(adapter, type);
2130                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2131                 }
2132                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2133                 buffer_info->length = buf_len - mapped_len;
2134                 buffer_info->dma =
2135                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2136                                         buffer_info->length, PCI_DMA_TODEVICE);
2137                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2138                                                    buffer_info->dma)))
2139                         goto err_dma;
2140
2141                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2142                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2143                         ATL1C_PCIMAP_TODEVICE);
2144                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2145                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2146         }
2147
2148         for (f = 0; f < nr_frags; f++) {
2149                 struct skb_frag_struct *frag;
2150
2151                 frag = &skb_shinfo(skb)->frags[f];
2152
2153                 use_tpd = atl1c_get_tpd(adapter, type);
2154                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2155
2156                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2157                 buffer_info->length = skb_frag_size(frag);
2158                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2159                                                     frag, 0,
2160                                                     buffer_info->length,
2161                                                     DMA_TO_DEVICE);
2162                 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2163                         goto err_dma;
2164
2165                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2166                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2167                         ATL1C_PCIMAP_TODEVICE);
2168                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2169                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2170         }
2171
2172         /* The last tpd */
2173         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2174         /* The last buffer info contain the skb address,
2175            so it will be free after unmap */
2176         buffer_info->skb = skb;
2177
2178         return 0;
2179
2180 err_dma:
2181         buffer_info->dma = 0;
2182         buffer_info->length = 0;
2183         return -1;
2184 }
2185
2186 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2187                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2188 {
2189         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2190         u16 reg;
2191
2192         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2193         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2194 }
2195
2196 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2197                                           struct net_device *netdev)
2198 {
2199         struct atl1c_adapter *adapter = netdev_priv(netdev);
2200         unsigned long flags;
2201         u16 tpd_req = 1;
2202         struct atl1c_tpd_desc *tpd;
2203         enum atl1c_trans_queue type = atl1c_trans_normal;
2204
2205         if (test_bit(__AT_DOWN, &adapter->flags)) {
2206                 dev_kfree_skb_any(skb);
2207                 return NETDEV_TX_OK;
2208         }
2209
2210         tpd_req = atl1c_cal_tpd_req(skb);
2211         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2212                 if (netif_msg_pktdata(adapter))
2213                         dev_info(&adapter->pdev->dev, "tx locked\n");
2214                 return NETDEV_TX_LOCKED;
2215         }
2216
2217         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2218                 /* no enough descriptor, just stop queue */
2219                 netif_stop_queue(netdev);
2220                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2221                 return NETDEV_TX_BUSY;
2222         }
2223
2224         tpd = atl1c_get_tpd(adapter, type);
2225
2226         /* do TSO and check sum */
2227         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2228                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2229                 dev_kfree_skb_any(skb);
2230                 return NETDEV_TX_OK;
2231         }
2232
2233         if (unlikely(vlan_tx_tag_present(skb))) {
2234                 u16 vlan = vlan_tx_tag_get(skb);
2235                 __le16 tag;
2236
2237                 vlan = cpu_to_le16(vlan);
2238                 AT_VLAN_TO_TAG(vlan, tag);
2239                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2240                 tpd->vlan_tag = tag;
2241         }
2242
2243         if (skb_network_offset(skb) != ETH_HLEN)
2244                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2245
2246         if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2247                 netif_info(adapter, tx_done, adapter->netdev,
2248                            "tx-skb droppted due to dma error\n");
2249                 /* roll back tpd/buffer */
2250                 atl1c_tx_rollback(adapter, tpd, type);
2251                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2252                 dev_kfree_skb(skb);
2253         } else {
2254                 atl1c_tx_queue(adapter, skb, tpd, type);
2255                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2256         }
2257
2258         return NETDEV_TX_OK;
2259 }
2260
2261 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2262 {
2263         struct net_device *netdev = adapter->netdev;
2264
2265         free_irq(adapter->pdev->irq, netdev);
2266
2267         if (adapter->have_msi)
2268                 pci_disable_msi(adapter->pdev);
2269 }
2270
2271 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2272 {
2273         struct pci_dev    *pdev   = adapter->pdev;
2274         struct net_device *netdev = adapter->netdev;
2275         int flags = 0;
2276         int err = 0;
2277
2278         adapter->have_msi = true;
2279         err = pci_enable_msi(adapter->pdev);
2280         if (err) {
2281                 if (netif_msg_ifup(adapter))
2282                         dev_err(&pdev->dev,
2283                                 "Unable to allocate MSI interrupt Error: %d\n",
2284                                 err);
2285                 adapter->have_msi = false;
2286         }
2287
2288         if (!adapter->have_msi)
2289                 flags |= IRQF_SHARED;
2290         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2291                         netdev->name, netdev);
2292         if (err) {
2293                 if (netif_msg_ifup(adapter))
2294                         dev_err(&pdev->dev,
2295                                 "Unable to allocate interrupt Error: %d\n",
2296                                 err);
2297                 if (adapter->have_msi)
2298                         pci_disable_msi(adapter->pdev);
2299                 return err;
2300         }
2301         if (netif_msg_ifup(adapter))
2302                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2303         return err;
2304 }
2305
2306
2307 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2308 {
2309         /* release tx-pending skbs and reset tx/rx ring index */
2310         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2311         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2312         atl1c_clean_rx_ring(adapter);
2313 }
2314
2315 static int atl1c_up(struct atl1c_adapter *adapter)
2316 {
2317         struct net_device *netdev = adapter->netdev;
2318         int err;
2319
2320         netif_carrier_off(netdev);
2321
2322         err = atl1c_configure(adapter);
2323         if (unlikely(err))
2324                 goto err_up;
2325
2326         err = atl1c_request_irq(adapter);
2327         if (unlikely(err))
2328                 goto err_up;
2329
2330         atl1c_check_link_status(adapter);
2331         clear_bit(__AT_DOWN, &adapter->flags);
2332         napi_enable(&adapter->napi);
2333         atl1c_irq_enable(adapter);
2334         netif_start_queue(netdev);
2335         return err;
2336
2337 err_up:
2338         atl1c_clean_rx_ring(adapter);
2339         return err;
2340 }
2341
2342 static void atl1c_down(struct atl1c_adapter *adapter)
2343 {
2344         struct net_device *netdev = adapter->netdev;
2345
2346         atl1c_del_timer(adapter);
2347         adapter->work_event = 0; /* clear all event */
2348         /* signal that we're down so the interrupt handler does not
2349          * reschedule our watchdog timer */
2350         set_bit(__AT_DOWN, &adapter->flags);
2351         netif_carrier_off(netdev);
2352         napi_disable(&adapter->napi);
2353         atl1c_irq_disable(adapter);
2354         atl1c_free_irq(adapter);
2355         /* disable ASPM if device inactive */
2356         atl1c_disable_l0s_l1(&adapter->hw);
2357         /* reset MAC to disable all RX/TX */
2358         atl1c_reset_mac(&adapter->hw);
2359         msleep(1);
2360
2361         adapter->link_speed = SPEED_0;
2362         adapter->link_duplex = -1;
2363         atl1c_reset_dma_ring(adapter);
2364 }
2365
2366 /**
2367  * atl1c_open - Called when a network interface is made active
2368  * @netdev: network interface device structure
2369  *
2370  * Returns 0 on success, negative value on failure
2371  *
2372  * The open entry point is called when a network interface is made
2373  * active by the system (IFF_UP).  At this point all resources needed
2374  * for transmit and receive operations are allocated, the interrupt
2375  * handler is registered with the OS, the watchdog timer is started,
2376  * and the stack is notified that the interface is ready.
2377  */
2378 static int atl1c_open(struct net_device *netdev)
2379 {
2380         struct atl1c_adapter *adapter = netdev_priv(netdev);
2381         int err;
2382
2383         /* disallow open during test */
2384         if (test_bit(__AT_TESTING, &adapter->flags))
2385                 return -EBUSY;
2386
2387         /* allocate rx/tx dma buffer & descriptors */
2388         err = atl1c_setup_ring_resources(adapter);
2389         if (unlikely(err))
2390                 return err;
2391
2392         err = atl1c_up(adapter);
2393         if (unlikely(err))
2394                 goto err_up;
2395
2396         return 0;
2397
2398 err_up:
2399         atl1c_free_irq(adapter);
2400         atl1c_free_ring_resources(adapter);
2401         atl1c_reset_mac(&adapter->hw);
2402         return err;
2403 }
2404
2405 /**
2406  * atl1c_close - Disables a network interface
2407  * @netdev: network interface device structure
2408  *
2409  * Returns 0, this is not allowed to fail
2410  *
2411  * The close entry point is called when an interface is de-activated
2412  * by the OS.  The hardware is still under the drivers control, but
2413  * needs to be disabled.  A global MAC reset is issued to stop the
2414  * hardware, and all transmit and receive resources are freed.
2415  */
2416 static int atl1c_close(struct net_device *netdev)
2417 {
2418         struct atl1c_adapter *adapter = netdev_priv(netdev);
2419
2420         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2421         set_bit(__AT_DOWN, &adapter->flags);
2422         cancel_work_sync(&adapter->common_task);
2423         atl1c_down(adapter);
2424         atl1c_free_ring_resources(adapter);
2425         return 0;
2426 }
2427
2428 static int atl1c_suspend(struct device *dev)
2429 {
2430         struct pci_dev *pdev = to_pci_dev(dev);
2431         struct net_device *netdev = pci_get_drvdata(pdev);
2432         struct atl1c_adapter *adapter = netdev_priv(netdev);
2433         struct atl1c_hw *hw = &adapter->hw;
2434         u32 wufc = adapter->wol;
2435
2436         atl1c_disable_l0s_l1(hw);
2437         if (netif_running(netdev)) {
2438                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2439                 atl1c_down(adapter);
2440         }
2441         netif_device_detach(netdev);
2442
2443         if (wufc)
2444                 if (atl1c_phy_to_ps_link(hw) != 0)
2445                         dev_dbg(&pdev->dev, "phy power saving failed");
2446
2447         atl1c_power_saving(hw, wufc);
2448
2449         return 0;
2450 }
2451
2452 #ifdef CONFIG_PM_SLEEP
2453 static int atl1c_resume(struct device *dev)
2454 {
2455         struct pci_dev *pdev = to_pci_dev(dev);
2456         struct net_device *netdev = pci_get_drvdata(pdev);
2457         struct atl1c_adapter *adapter = netdev_priv(netdev);
2458
2459         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2460         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2461
2462         atl1c_phy_reset(&adapter->hw);
2463         atl1c_reset_mac(&adapter->hw);
2464         atl1c_phy_init(&adapter->hw);
2465
2466 #if 0
2467         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2468         pm_data &= ~PM_CTRLSTAT_PME_EN;
2469         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2470 #endif
2471
2472         netif_device_attach(netdev);
2473         if (netif_running(netdev))
2474                 atl1c_up(adapter);
2475
2476         return 0;
2477 }
2478 #endif
2479
2480 static void atl1c_shutdown(struct pci_dev *pdev)
2481 {
2482         struct net_device *netdev = pci_get_drvdata(pdev);
2483         struct atl1c_adapter *adapter = netdev_priv(netdev);
2484
2485         atl1c_suspend(&pdev->dev);
2486         pci_wake_from_d3(pdev, adapter->wol);
2487         pci_set_power_state(pdev, PCI_D3hot);
2488 }
2489
2490 static const struct net_device_ops atl1c_netdev_ops = {
2491         .ndo_open               = atl1c_open,
2492         .ndo_stop               = atl1c_close,
2493         .ndo_validate_addr      = eth_validate_addr,
2494         .ndo_start_xmit         = atl1c_xmit_frame,
2495         .ndo_set_mac_address    = atl1c_set_mac_addr,
2496         .ndo_set_rx_mode        = atl1c_set_multi,
2497         .ndo_change_mtu         = atl1c_change_mtu,
2498         .ndo_fix_features       = atl1c_fix_features,
2499         .ndo_set_features       = atl1c_set_features,
2500         .ndo_do_ioctl           = atl1c_ioctl,
2501         .ndo_tx_timeout         = atl1c_tx_timeout,
2502         .ndo_get_stats          = atl1c_get_stats,
2503 #ifdef CONFIG_NET_POLL_CONTROLLER
2504         .ndo_poll_controller    = atl1c_netpoll,
2505 #endif
2506 };
2507
2508 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2509 {
2510         SET_NETDEV_DEV(netdev, &pdev->dev);
2511         pci_set_drvdata(pdev, netdev);
2512
2513         netdev->netdev_ops = &atl1c_netdev_ops;
2514         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2515         atl1c_set_ethtool_ops(netdev);
2516
2517         /* TODO: add when ready */
2518         netdev->hw_features =   NETIF_F_SG              |
2519                                 NETIF_F_HW_CSUM         |
2520                                 NETIF_F_HW_VLAN_CTAG_RX |
2521                                 NETIF_F_TSO             |
2522                                 NETIF_F_TSO6;
2523         netdev->features =      netdev->hw_features     |
2524                                 NETIF_F_HW_VLAN_CTAG_TX;
2525         return 0;
2526 }
2527
2528 /**
2529  * atl1c_probe - Device Initialization Routine
2530  * @pdev: PCI device information struct
2531  * @ent: entry in atl1c_pci_tbl
2532  *
2533  * Returns 0 on success, negative on failure
2534  *
2535  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2536  * The OS initialization, configuring of the adapter private structure,
2537  * and a hardware reset occur.
2538  */
2539 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2540 {
2541         struct net_device *netdev;
2542         struct atl1c_adapter *adapter;
2543         static int cards_found;
2544
2545         int err = 0;
2546
2547         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2548         err = pci_enable_device_mem(pdev);
2549         if (err) {
2550                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2551                 return err;
2552         }
2553
2554         /*
2555          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2556          * shared register for the high 32 bits, so only a single, aligned,
2557          * 4 GB physical address range can be used at a time.
2558          *
2559          * Supporting 64-bit DMA on this hardware is more trouble than it's
2560          * worth.  It is far easier to limit to 32-bit DMA than update
2561          * various kernel subsystems to support the mechanics required by a
2562          * fixed-high-32-bit system.
2563          */
2564         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2565             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2566                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2567                 goto err_dma;
2568         }
2569
2570         err = pci_request_regions(pdev, atl1c_driver_name);
2571         if (err) {
2572                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2573                 goto err_pci_reg;
2574         }
2575
2576         pci_set_master(pdev);
2577
2578         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2579         if (netdev == NULL) {
2580                 err = -ENOMEM;
2581                 goto err_alloc_etherdev;
2582         }
2583
2584         err = atl1c_init_netdev(netdev, pdev);
2585         if (err) {
2586                 dev_err(&pdev->dev, "init netdevice failed\n");
2587                 goto err_init_netdev;
2588         }
2589         adapter = netdev_priv(netdev);
2590         adapter->bd_number = cards_found;
2591         adapter->netdev = netdev;
2592         adapter->pdev = pdev;
2593         adapter->hw.adapter = adapter;
2594         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2595         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2596         if (!adapter->hw.hw_addr) {
2597                 err = -EIO;
2598                 dev_err(&pdev->dev, "cannot map device registers\n");
2599                 goto err_ioremap;
2600         }
2601
2602         /* init mii data */
2603         adapter->mii.dev = netdev;
2604         adapter->mii.mdio_read  = atl1c_mdio_read;
2605         adapter->mii.mdio_write = atl1c_mdio_write;
2606         adapter->mii.phy_id_mask = 0x1f;
2607         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2608         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2609         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2610                         (unsigned long)adapter);
2611         /* setup the private structure */
2612         err = atl1c_sw_init(adapter);
2613         if (err) {
2614                 dev_err(&pdev->dev, "net device private data init failed\n");
2615                 goto err_sw_init;
2616         }
2617         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2618
2619         /* Init GPHY as early as possible due to power saving issue  */
2620         atl1c_phy_reset(&adapter->hw);
2621
2622         err = atl1c_reset_mac(&adapter->hw);
2623         if (err) {
2624                 err = -EIO;
2625                 goto err_reset;
2626         }
2627
2628         /* reset the controller to
2629          * put the device in a known good starting state */
2630         err = atl1c_phy_init(&adapter->hw);
2631         if (err) {
2632                 err = -EIO;
2633                 goto err_reset;
2634         }
2635         if (atl1c_read_mac_addr(&adapter->hw)) {
2636                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2637                 netdev->addr_assign_type = NET_ADDR_RANDOM;
2638         }
2639         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2640         if (netif_msg_probe(adapter))
2641                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2642                         adapter->hw.mac_addr);
2643
2644         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2645         INIT_WORK(&adapter->common_task, atl1c_common_task);
2646         adapter->work_event = 0;
2647         err = register_netdev(netdev);
2648         if (err) {
2649                 dev_err(&pdev->dev, "register netdevice failed\n");
2650                 goto err_register;
2651         }
2652
2653         if (netif_msg_probe(adapter))
2654                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2655         cards_found++;
2656         return 0;
2657
2658 err_reset:
2659 err_register:
2660 err_sw_init:
2661         iounmap(adapter->hw.hw_addr);
2662 err_init_netdev:
2663 err_ioremap:
2664         free_netdev(netdev);
2665 err_alloc_etherdev:
2666         pci_release_regions(pdev);
2667 err_pci_reg:
2668 err_dma:
2669         pci_disable_device(pdev);
2670         return err;
2671 }
2672
2673 /**
2674  * atl1c_remove - Device Removal Routine
2675  * @pdev: PCI device information struct
2676  *
2677  * atl1c_remove is called by the PCI subsystem to alert the driver
2678  * that it should release a PCI device.  The could be caused by a
2679  * Hot-Plug event, or because the driver is going to be removed from
2680  * memory.
2681  */
2682 static void atl1c_remove(struct pci_dev *pdev)
2683 {
2684         struct net_device *netdev = pci_get_drvdata(pdev);
2685         struct atl1c_adapter *adapter = netdev_priv(netdev);
2686
2687         unregister_netdev(netdev);
2688         /* restore permanent address */
2689         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2690         atl1c_phy_disable(&adapter->hw);
2691
2692         iounmap(adapter->hw.hw_addr);
2693
2694         pci_release_regions(pdev);
2695         pci_disable_device(pdev);
2696         free_netdev(netdev);
2697 }
2698
2699 /**
2700  * atl1c_io_error_detected - called when PCI error is detected
2701  * @pdev: Pointer to PCI device
2702  * @state: The current pci connection state
2703  *
2704  * This function is called after a PCI bus error affecting
2705  * this device has been detected.
2706  */
2707 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2708                                                 pci_channel_state_t state)
2709 {
2710         struct net_device *netdev = pci_get_drvdata(pdev);
2711         struct atl1c_adapter *adapter = netdev_priv(netdev);
2712
2713         netif_device_detach(netdev);
2714
2715         if (state == pci_channel_io_perm_failure)
2716                 return PCI_ERS_RESULT_DISCONNECT;
2717
2718         if (netif_running(netdev))
2719                 atl1c_down(adapter);
2720
2721         pci_disable_device(pdev);
2722
2723         /* Request a slot slot reset. */
2724         return PCI_ERS_RESULT_NEED_RESET;
2725 }
2726
2727 /**
2728  * atl1c_io_slot_reset - called after the pci bus has been reset.
2729  * @pdev: Pointer to PCI device
2730  *
2731  * Restart the card from scratch, as if from a cold-boot. Implementation
2732  * resembles the first-half of the e1000_resume routine.
2733  */
2734 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2735 {
2736         struct net_device *netdev = pci_get_drvdata(pdev);
2737         struct atl1c_adapter *adapter = netdev_priv(netdev);
2738
2739         if (pci_enable_device(pdev)) {
2740                 if (netif_msg_hw(adapter))
2741                         dev_err(&pdev->dev,
2742                                 "Cannot re-enable PCI device after reset\n");
2743                 return PCI_ERS_RESULT_DISCONNECT;
2744         }
2745         pci_set_master(pdev);
2746
2747         pci_enable_wake(pdev, PCI_D3hot, 0);
2748         pci_enable_wake(pdev, PCI_D3cold, 0);
2749
2750         atl1c_reset_mac(&adapter->hw);
2751
2752         return PCI_ERS_RESULT_RECOVERED;
2753 }
2754
2755 /**
2756  * atl1c_io_resume - called when traffic can start flowing again.
2757  * @pdev: Pointer to PCI device
2758  *
2759  * This callback is called when the error recovery driver tells us that
2760  * its OK to resume normal operation. Implementation resembles the
2761  * second-half of the atl1c_resume routine.
2762  */
2763 static void atl1c_io_resume(struct pci_dev *pdev)
2764 {
2765         struct net_device *netdev = pci_get_drvdata(pdev);
2766         struct atl1c_adapter *adapter = netdev_priv(netdev);
2767
2768         if (netif_running(netdev)) {
2769                 if (atl1c_up(adapter)) {
2770                         if (netif_msg_hw(adapter))
2771                                 dev_err(&pdev->dev,
2772                                         "Cannot bring device back up after reset\n");
2773                         return;
2774                 }
2775         }
2776
2777         netif_device_attach(netdev);
2778 }
2779
2780 static const struct pci_error_handlers atl1c_err_handler = {
2781         .error_detected = atl1c_io_error_detected,
2782         .slot_reset = atl1c_io_slot_reset,
2783         .resume = atl1c_io_resume,
2784 };
2785
2786 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2787
2788 static struct pci_driver atl1c_driver = {
2789         .name     = atl1c_driver_name,
2790         .id_table = atl1c_pci_tbl,
2791         .probe    = atl1c_probe,
2792         .remove   = atl1c_remove,
2793         .shutdown = atl1c_shutdown,
2794         .err_handler = &atl1c_err_handler,
2795         .driver.pm = &atl1c_pm_ops,
2796 };
2797
2798 module_pci_driver(atl1c_driver);