drivers/net/ethernet/atheros/atl1c/atl1c_main.c

   1 /*
   2  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1c.h"
  23
  24 #define ATL1C_DRV_VERSION "1.0.1.1-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27
  28 /*
  29  * atl1c_pci_tbl - PCI Device ID Table
  30  *
  31  * Wildcard entries (PCI_ANY_ID) should come last
  32  * Last entry must be all 0s
  33  *
  34  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  35  *   Class, Class Mask, private data (not used) }
  36  */
  37 static const struct pci_device_id atl1c_pci_tbl[] = {
  38         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  41         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  42         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  43         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  44         /* required last entry */
  45         { 0 }
  46 };
  47 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  48
  49 MODULE_AUTHOR("Jie Yang");
  50 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
  51 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
  52 MODULE_LICENSE("GPL");
  53 MODULE_VERSION(ATL1C_DRV_VERSION);
  54
  55 static int atl1c_stop_mac(struct atl1c_hw *hw);
  56 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  57 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
  58 static void atl1c_start_mac(struct atl1c_adapter *adapter);
  59 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
  60                    int *work_done, int work_to_do);
  61 static int atl1c_up(struct atl1c_adapter *adapter);
  62 static void atl1c_down(struct atl1c_adapter *adapter);
  63 static int atl1c_reset_mac(struct atl1c_hw *hw);
  64 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
  65 static int atl1c_configure(struct atl1c_adapter *adapter);
  66 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
  67
  68 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)
 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                 dev_consume_skb_any(buffer_info->skb);
 855         buffer_info->dma = 0;
 856         buffer_info->skb = NULL;
 857         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 858 }
 859 /**
 860  * atl1c_clean_tx_ring - Free Tx-skb
 861  * @adapter: board private structure
 862  */
 863 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 864                                 enum atl1c_trans_queue type)
 865 {
 866         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 867         struct atl1c_buffer *buffer_info;
 868         struct pci_dev *pdev = adapter->pdev;
 869         u16 index, ring_count;
 870
 871         ring_count = tpd_ring->count;
 872         for (index = 0; index < ring_count; index++) {
 873                 buffer_info = &tpd_ring->buffer_info[index];
 874                 atl1c_clean_buffer(pdev, buffer_info);
 875         }
 876
 877         /* Zero out Tx-buffers */
 878         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 879                 ring_count);
 880         atomic_set(&tpd_ring->next_to_clean, 0);
 881         tpd_ring->next_to_use = 0;
 882 }
 883
 884 /**
 885  * atl1c_clean_rx_ring - Free rx-reservation skbs
 886  * @adapter: board private structure
 887  */
 888 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 889 {
 890         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 891         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 892         struct atl1c_buffer *buffer_info;
 893         struct pci_dev *pdev = adapter->pdev;
 894         int j;
 895
 896         for (j = 0; j < rfd_ring->count; j++) {
 897                 buffer_info = &rfd_ring->buffer_info[j];
 898                 atl1c_clean_buffer(pdev, buffer_info);
 899         }
 900         /* zero out the descriptor ring */
 901         memset(rfd_ring->desc, 0, rfd_ring->size);
 902         rfd_ring->next_to_clean = 0;
 903         rfd_ring->next_to_use = 0;
 904         rrd_ring->next_to_use = 0;
 905         rrd_ring->next_to_clean = 0;
 906 }
 907
 908 /*
 909  * Read / Write Ptr Initialize:
 910  */
 911 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 912 {
 913         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 914         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 915         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 916         struct atl1c_buffer *buffer_info;
 917         int i, j;
 918
 919         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 920                 tpd_ring[i].next_to_use = 0;
 921                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 922                 buffer_info = tpd_ring[i].buffer_info;
 923                 for (j = 0; j < tpd_ring->count; j++)
 924                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 925                                         ATL1C_BUFFER_FREE);
 926         }
 927         rfd_ring->next_to_use = 0;
 928         rfd_ring->next_to_clean = 0;
 929         rrd_ring->next_to_use = 0;
 930         rrd_ring->next_to_clean = 0;
 931         for (j = 0; j < rfd_ring->count; j++) {
 932                 buffer_info = &rfd_ring->buffer_info[j];
 933                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 934         }
 935 }
 936
 937 /**
 938  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 939  * @adapter: board private structure
 940  *
 941  * Free all transmit software resources
 942  */
 943 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 944 {
 945         struct pci_dev *pdev = adapter->pdev;
 946
 947         pci_free_consistent(pdev, adapter->ring_header.size,
 948                                         adapter->ring_header.desc,
 949                                         adapter->ring_header.dma);
 950         adapter->ring_header.desc = NULL;
 951
 952         /* Note: just free tdp_ring.buffer_info,
 953         *  it contain rfd_ring.buffer_info, do not double free */
 954         if (adapter->tpd_ring[0].buffer_info) {
 955                 kfree(adapter->tpd_ring[0].buffer_info);
 956                 adapter->tpd_ring[0].buffer_info = NULL;
 957         }
 958         if (adapter->rx_page) {
 959                 put_page(adapter->rx_page);
 960                 adapter->rx_page = NULL;
 961         }
 962 }
 963
 964 /**
 965  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 966  * @adapter: board private structure
 967  *
 968  * Return 0 on success, negative on failure
 969  */
 970 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 971 {
 972         struct pci_dev *pdev = adapter->pdev;
 973         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 974         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 975         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 976         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 977         int size;
 978         int i;
 979         int count = 0;
 980         int rx_desc_count = 0;
 981         u32 offset = 0;
 982
 983         rrd_ring->count = rfd_ring->count;
 984         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 985                 tpd_ring[i].count = tpd_ring[0].count;
 986
 987         /* 2 tpd queue, one high priority queue,
 988          * another normal priority queue */
 989         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 990                 rfd_ring->count);
 991         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 992         if (unlikely(!tpd_ring->buffer_info))
 993                 goto err_nomem;
 994
 995         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 996                 tpd_ring[i].buffer_info =
 997                         (tpd_ring->buffer_info + count);
 998                 count += tpd_ring[i].count;
 999         }
1000
1001         rfd_ring->buffer_info =
1002                 (tpd_ring->buffer_info + count);
1003         count += rfd_ring->count;
1004         rx_desc_count += rfd_ring->count;
1005
1006         /*
1007          * real ring DMA buffer
1008          * each ring/block may need up to 8 bytes for alignment, hence the
1009          * additional bytes tacked onto the end.
1010          */
1011         ring_header->size = size =
1012                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1013                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1014                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1015                 8 * 4;
1016
1017         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1018                                 &ring_header->dma);
1019         if (unlikely(!ring_header->desc)) {
1020                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1021                 goto err_nomem;
1022         }
1023         memset(ring_header->desc, 0, ring_header->size);
1024         /* init TPD ring */
1025
1026         tpd_ring[0].dma = roundup(ring_header->dma, 8);
1027         offset = tpd_ring[0].dma - ring_header->dma;
1028         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1029                 tpd_ring[i].dma = ring_header->dma + offset;
1030                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1031                 tpd_ring[i].size =
1032                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1033                 offset += roundup(tpd_ring[i].size, 8);
1034         }
1035         /* init RFD ring */
1036         rfd_ring->dma = ring_header->dma + offset;
1037         rfd_ring->desc = (u8 *) ring_header->desc + offset;
1038         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1039         offset += roundup(rfd_ring->size, 8);
1040
1041         /* init RRD ring */
1042         rrd_ring->dma = ring_header->dma + offset;
1043         rrd_ring->desc = (u8 *) ring_header->desc + offset;
1044         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1045                 rrd_ring->count;
1046         offset += roundup(rrd_ring->size, 8);
1047
1048         return 0;
1049
1050 err_nomem:
1051         kfree(tpd_ring->buffer_info);
1052         return -ENOMEM;
1053 }
1054
1055 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1056 {
1057         struct atl1c_hw *hw = &adapter->hw;
1058         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1059         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1060         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1061                                 adapter->tpd_ring;
1062
1063         /* TPD */
1064         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1065                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1066                                 AT_DMA_HI_ADDR_MASK) >> 32));
1067         /* just enable normal priority TX queue */
1068         AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1069                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1070                                 AT_DMA_LO_ADDR_MASK));
1071         AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1072                         (u32)(tpd_ring[atl1c_trans_high].dma &
1073                                 AT_DMA_LO_ADDR_MASK));
1074         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1075                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1076
1077
1078         /* RFD */
1079         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1080                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1081         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1082                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1083
1084         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1085                         rfd_ring->count & RFD_RING_SIZE_MASK);
1086         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1087                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1088
1089         /* RRD */
1090         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1091                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1092         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1093                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1094
1095         if (hw->nic_type == athr_l2c_b) {
1096                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1097                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1098                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1099                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1100                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1101                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1102                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1103                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1104         }
1105         /* Load all of base address above */
1106         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1107 }
1108
1109 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1110 {
1111         struct atl1c_hw *hw = &adapter->hw;
1112         int max_pay_load;
1113         u16 tx_offload_thresh;
1114         u32 txq_ctrl_data;
1115
1116         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1117         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1118                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1119         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1120         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1121         /*
1122          * if BIOS had changed the dam-read-max-length to an invalid value,
1123          * restore it to default value
1124          */
1125         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1126                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1127                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1128         }
1129         txq_ctrl_data =
1130                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1131                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1132
1133         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1134 }
1135
1136 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1137 {
1138         struct atl1c_hw *hw = &adapter->hw;
1139         u32 rxq_ctrl_data;
1140
1141         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1142                         RXQ_RFD_BURST_NUM_SHIFT;
1143
1144         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1145                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1146
1147         /* aspm for gigabit */
1148         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1149                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1150                         ASPM_THRUPUT_LIMIT_100M);
1151
1152         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1153 }
1154
1155 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1156 {
1157         struct atl1c_hw *hw = &adapter->hw;
1158         u32 dma_ctrl_data;
1159
1160         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1161                 DMA_CTRL_RREQ_PRI_DATA |
1162                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1163                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1164                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1165
1166         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1167 }
1168
1169 /*
1170  * Stop the mac, transmit and receive units
1171  * hw - Struct containing variables accessed by shared code
1172  * return : 0  or  idle status (if error)
1173  */
1174 static int atl1c_stop_mac(struct atl1c_hw *hw)
1175 {
1176         u32 data;
1177
1178         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1179         data &= ~RXQ_CTRL_EN;
1180         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1181
1182         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1183         data &= ~TXQ_CTRL_EN;
1184         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1185
1186         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1187
1188         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1189         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1190         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1191
1192         return (int)atl1c_wait_until_idle(hw,
1193                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1194 }
1195
1196 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1197 {
1198         struct atl1c_hw *hw = &adapter->hw;
1199         u32 mac, txq, rxq;
1200
1201         hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1202         hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1203                 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1204
1205         AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1206         AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1207         AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1208
1209         txq |= TXQ_CTRL_EN;
1210         rxq |= RXQ_CTRL_EN;
1211         mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1212                MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1213                MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1214                MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1215                MAC_CTRL_HASH_ALG_CRC32;
1216         if (hw->mac_duplex)
1217                 mac |= MAC_CTRL_DUPLX;
1218         else
1219                 mac &= ~MAC_CTRL_DUPLX;
1220         mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1221         mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1222
1223         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1224         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1225         AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1226 }
1227
1228 /*
1229  * Reset the transmit and receive units; mask and clear all interrupts.
1230  * hw - Struct containing variables accessed by shared code
1231  * return : 0  or  idle status (if error)
1232  */
1233 static int atl1c_reset_mac(struct atl1c_hw *hw)
1234 {
1235         struct atl1c_adapter *adapter = hw->adapter;
1236         struct pci_dev *pdev = adapter->pdev;
1237         u32 ctrl_data = 0;
1238
1239         atl1c_stop_mac(hw);
1240         /*
1241          * Issue Soft Reset to the MAC.  This will reset the chip's
1242          * transmit, receive, DMA.  It will not effect
1243          * the current PCI configuration.  The global reset bit is self-
1244          * clearing, and should clear within a microsecond.
1245          */
1246         AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1247         ctrl_data |= MASTER_CTRL_OOB_DIS;
1248         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1249
1250         AT_WRITE_FLUSH(hw);
1251         msleep(10);
1252         /* Wait at least 10ms for All module to be Idle */
1253
1254         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1255                 dev_err(&pdev->dev,
1256                         "MAC state machine can't be idle since"
1257                         " disabled for 10ms second\n");
1258                 return -1;
1259         }
1260         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1261
1262         /* driver control speed/duplex */
1263         AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1264         AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1265
1266         /* clk switch setting */
1267         AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1268         switch (hw->nic_type) {
1269         case athr_l2c_b:
1270                 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1271                                 SERDES_MAC_CLK_SLOWDOWN);
1272                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1273                 break;
1274         case athr_l2c_b2:
1275         case athr_l1d_2:
1276                 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1277                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1278                 break;
1279         default:
1280                 break;
1281         }
1282
1283         return 0;
1284 }
1285
1286 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1287 {
1288         u16 ctrl_flags = hw->ctrl_flags;
1289
1290         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1291         atl1c_set_aspm(hw, SPEED_0);
1292         hw->ctrl_flags = ctrl_flags;
1293 }
1294
1295 /*
1296  * Set ASPM state.
1297  * Enable/disable L0s/L1 depend on link state.
1298  */
1299 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1300 {
1301         u32 pm_ctrl_data;
1302         u32 link_l1_timer;
1303
1304         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1305         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1306                           PM_CTRL_ASPM_L0S_EN |
1307                           PM_CTRL_MAC_ASPM_CHK);
1308         /* L1 timer */
1309         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1310                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1311                 link_l1_timer =
1312                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1313                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1314                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1315                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1316         } else {
1317                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1318                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1319                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1320                         link_l1_timer = 1;
1321                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1322                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1323         }
1324
1325         /* L0S/L1 enable */
1326         if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1327                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1328         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1329                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1330
1331         /* l2cb & l1d & l2cb2 & l1d2 */
1332         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1333             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1334                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1335                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1336                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1337                                 PM_CTRL_SERDES_PD_EX_L1 |
1338                                 PM_CTRL_CLK_SWH_L1;
1339                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1340                                   PM_CTRL_SERDES_PLL_L1_EN |
1341                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1342                                   PM_CTRL_SA_DLY_EN |
1343                                   PM_CTRL_HOTRST);
1344                 /* disable l0s if link down or l2cb */
1345                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1346                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1347         } else { /* l1c */
1348                 pm_ctrl_data =
1349                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1350                 if (link_speed != SPEED_0) {
1351                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1352                                         PM_CTRL_SERDES_PLL_L1_EN |
1353                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1354                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1355                                           PM_CTRL_CLK_SWH_L1 |
1356                                           PM_CTRL_ASPM_L0S_EN |
1357                                           PM_CTRL_ASPM_L1_EN);
1358                 } else { /* link down */
1359                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1360                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1361                                           PM_CTRL_SERDES_PLL_L1_EN |
1362                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1363                                           PM_CTRL_ASPM_L0S_EN);
1364                 }
1365         }
1366         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1367
1368         return;
1369 }
1370
1371 /**
1372  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1373  * @adapter: board private structure
1374  *
1375  * Configure the Tx /Rx unit of the MAC after a reset.
1376  */
1377 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1378 {
1379         struct atl1c_hw *hw = &adapter->hw;
1380         u32 master_ctrl_data = 0;
1381         u32 intr_modrt_data;
1382         u32 data;
1383
1384         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1385         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1386                               MASTER_CTRL_RX_ITIMER_EN |
1387                               MASTER_CTRL_INT_RDCLR);
1388         /* clear interrupt status */
1389         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1390         /*  Clear any WOL status */
1391         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1392         /* set Interrupt Clear Timer
1393          * HW will enable self to assert interrupt event to system after
1394          * waiting x-time for software to notify it accept interrupt.
1395          */
1396
1397         data = CLK_GATING_EN_ALL;
1398         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1399                 if (hw->nic_type == athr_l2c_b)
1400                         data &= ~CLK_GATING_RXMAC_EN;
1401         } else
1402                 data = 0;
1403         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1404
1405         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1406                 hw->ict & INT_RETRIG_TIMER_MASK);
1407
1408         atl1c_configure_des_ring(adapter);
1409
1410         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1411                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1412                                         IRQ_MODRT_TX_TIMER_SHIFT;
1413                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1414                                         IRQ_MODRT_RX_TIMER_SHIFT;
1415                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1416                 master_ctrl_data |=
1417                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1418         }
1419
1420         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1421                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1422
1423         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1424         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1425
1426         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1427                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1428
1429         /* set MTU */
1430         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1431                         VLAN_HLEN + ETH_FCS_LEN);
1432
1433         atl1c_configure_tx(adapter);
1434         atl1c_configure_rx(adapter);
1435         atl1c_configure_dma(adapter);
1436
1437         return 0;
1438 }
1439
1440 static int atl1c_configure(struct atl1c_adapter *adapter)
1441 {
1442         struct net_device *netdev = adapter->netdev;
1443         int num;
1444
1445         atl1c_init_ring_ptrs(adapter);
1446         atl1c_set_multi(netdev);
1447         atl1c_restore_vlan(adapter);
1448
1449         num = atl1c_alloc_rx_buffer(adapter);
1450         if (unlikely(num == 0))
1451                 return -ENOMEM;
1452
1453         if (atl1c_configure_mac(adapter))
1454                 return -EIO;
1455
1456         return 0;
1457 }
1458
1459 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1460 {
1461         u16 hw_reg_addr = 0;
1462         unsigned long *stats_item = NULL;
1463         u32 data;
1464
1465         /* update rx status */
1466         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1467         stats_item  = &adapter->hw_stats.rx_ok;
1468         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1469                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1470                 *stats_item += data;
1471                 stats_item++;
1472                 hw_reg_addr += 4;
1473         }
1474 /* update tx status */
1475         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1476         stats_item  = &adapter->hw_stats.tx_ok;
1477         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1478                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1479                 *stats_item += data;
1480                 stats_item++;
1481                 hw_reg_addr += 4;
1482         }
1483 }
1484
1485 /**
1486  * atl1c_get_stats - Get System Network Statistics
1487  * @netdev: network interface device structure
1488  *
1489  * Returns the address of the device statistics structure.
1490  * The statistics are actually updated from the timer callback.
1491  */
1492 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1493 {
1494         struct atl1c_adapter *adapter = netdev_priv(netdev);
1495         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1496         struct net_device_stats *net_stats = &netdev->stats;
1497
1498         atl1c_update_hw_stats(adapter);
1499         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1500         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1501         net_stats->multicast  = hw_stats->rx_mcast;
1502         net_stats->collisions = hw_stats->tx_1_col +
1503                                 hw_stats->tx_2_col +
1504                                 hw_stats->tx_late_col +
1505                                 hw_stats->tx_abort_col;
1506
1507         net_stats->rx_errors  = hw_stats->rx_frag +
1508                                 hw_stats->rx_fcs_err +
1509                                 hw_stats->rx_len_err +
1510                                 hw_stats->rx_sz_ov +
1511                                 hw_stats->rx_rrd_ov +
1512                                 hw_stats->rx_align_err +
1513                                 hw_stats->rx_rxf_ov;
1514
1515         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1516         net_stats->rx_length_errors = hw_stats->rx_len_err;
1517         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1518         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1519         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1520
1521         net_stats->tx_errors = hw_stats->tx_late_col +
1522                                hw_stats->tx_abort_col +
1523                                hw_stats->tx_underrun +
1524                                hw_stats->tx_trunc;
1525
1526         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1527         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1528         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1529
1530         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1531         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1532
1533         return net_stats;
1534 }
1535
1536 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1537 {
1538         u16 phy_data;
1539
1540         spin_lock(&adapter->mdio_lock);
1541         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1542         spin_unlock(&adapter->mdio_lock);
1543 }
1544
1545 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1546                                 enum atl1c_trans_queue type)
1547 {
1548         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1549         struct atl1c_buffer *buffer_info;
1550         struct pci_dev *pdev = adapter->pdev;
1551         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1552         u16 hw_next_to_clean;
1553         u16 reg;
1554
1555         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1556
1557         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1558
1559         while (next_to_clean != hw_next_to_clean) {
1560                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1561                 atl1c_clean_buffer(pdev, buffer_info);
1562                 if (++next_to_clean == tpd_ring->count)
1563                         next_to_clean = 0;
1564                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1565         }
1566
1567         if (netif_queue_stopped(adapter->netdev) &&
1568                         netif_carrier_ok(adapter->netdev)) {
1569                 netif_wake_queue(adapter->netdev);
1570         }
1571
1572         return true;
1573 }
1574
1575 /**
1576  * atl1c_intr - Interrupt Handler
1577  * @irq: interrupt number
1578  * @data: pointer to a network interface device structure
1579  */
1580 static irqreturn_t atl1c_intr(int irq, void *data)
1581 {
1582         struct net_device *netdev  = data;
1583         struct atl1c_adapter *adapter = netdev_priv(netdev);
1584         struct pci_dev *pdev = adapter->pdev;
1585         struct atl1c_hw *hw = &adapter->hw;
1586         int max_ints = AT_MAX_INT_WORK;
1587         int handled = IRQ_NONE;
1588         u32 status;
1589         u32 reg_data;
1590
1591         do {
1592                 AT_READ_REG(hw, REG_ISR, &reg_data);
1593                 status = reg_data & hw->intr_mask;
1594
1595                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1596                         if (max_ints != AT_MAX_INT_WORK)
1597                                 handled = IRQ_HANDLED;
1598                         break;
1599                 }
1600                 /* link event */
1601                 if (status & ISR_GPHY)
1602                         atl1c_clear_phy_int(adapter);
1603                 /* Ack ISR */
1604                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1605                 if (status & ISR_RX_PKT) {
1606                         if (likely(napi_schedule_prep(&adapter->napi))) {
1607                                 hw->intr_mask &= ~ISR_RX_PKT;
1608                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1609                                 __napi_schedule(&adapter->napi);
1610                         }
1611                 }
1612                 if (status & ISR_TX_PKT)
1613                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1614
1615                 handled = IRQ_HANDLED;
1616                 /* check if PCIE PHY Link down */
1617                 if (status & ISR_ERROR) {
1618                         if (netif_msg_hw(adapter))
1619                                 dev_err(&pdev->dev,
1620                                         "atl1c hardware error (status = 0x%x)\n",
1621                                         status & ISR_ERROR);
1622                         /* reset MAC */
1623                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1624                         schedule_work(&adapter->common_task);
1625                         return IRQ_HANDLED;
1626                 }
1627
1628                 if (status & ISR_OVER)
1629                         if (netif_msg_intr(adapter))
1630                                 dev_warn(&pdev->dev,
1631                                         "TX/RX overflow (status = 0x%x)\n",
1632                                         status & ISR_OVER);
1633
1634                 /* link event */
1635                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1636                         netdev->stats.tx_carrier_errors++;
1637                         atl1c_link_chg_event(adapter);
1638                         break;
1639                 }
1640
1641         } while (--max_ints > 0);
1642         /* re-enable Interrupt*/
1643         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1644         return handled;
1645 }
1646
1647 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1648                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1649 {
1650         /*
1651          * The pid field in RRS in not correct sometimes, so we
1652          * cannot figure out if the packet is fragmented or not,
1653          * so we tell the KERNEL CHECKSUM_NONE
1654          */
1655         skb_checksum_none_assert(skb);
1656 }
1657
1658 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1659 {
1660         struct sk_buff *skb;
1661         struct page *page;
1662
1663         if (adapter->rx_frag_size > PAGE_SIZE)
1664                 return netdev_alloc_skb(adapter->netdev,
1665                                         adapter->rx_buffer_len);
1666
1667         page = adapter->rx_page;
1668         if (!page) {
1669                 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1670                 if (unlikely(!page))
1671                         return NULL;
1672                 adapter->rx_page_offset = 0;
1673         }
1674
1675         skb = build_skb(page_address(page) + adapter->rx_page_offset,
1676                         adapter->rx_frag_size);
1677         if (likely(skb)) {
1678                 adapter->rx_page_offset += adapter->rx_frag_size;
1679                 if (adapter->rx_page_offset >= PAGE_SIZE)
1680                         adapter->rx_page = NULL;
1681                 else
1682                         get_page(page);
1683         }
1684         return skb;
1685 }
1686
1687 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1688 {
1689         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1690         struct pci_dev *pdev = adapter->pdev;
1691         struct atl1c_buffer *buffer_info, *next_info;
1692         struct sk_buff *skb;
1693         void *vir_addr = NULL;
1694         u16 num_alloc = 0;
1695         u16 rfd_next_to_use, next_next;
1696         struct atl1c_rx_free_desc *rfd_desc;
1697         dma_addr_t mapping;
1698
1699         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1700         if (++next_next == rfd_ring->count)
1701                 next_next = 0;
1702         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1703         next_info = &rfd_ring->buffer_info[next_next];
1704
1705         while (next_info->flags & ATL1C_BUFFER_FREE) {
1706                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1707
1708                 skb = atl1c_alloc_skb(adapter);
1709                 if (unlikely(!skb)) {
1710                         if (netif_msg_rx_err(adapter))
1711                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1712                         break;
1713                 }
1714
1715                 /*
1716                  * Make buffer alignment 2 beyond a 16 byte boundary
1717                  * this will result in a 16 byte aligned IP header after
1718                  * the 14 byte MAC header is removed
1719                  */
1720                 vir_addr = skb->data;
1721                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1722                 buffer_info->skb = skb;
1723                 buffer_info->length = adapter->rx_buffer_len;
1724                 mapping = pci_map_single(pdev, vir_addr,
1725                                                 buffer_info->length,
1726                                                 PCI_DMA_FROMDEVICE);
1727                 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1728                         dev_kfree_skb(skb);
1729                         buffer_info->skb = NULL;
1730                         buffer_info->length = 0;
1731                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1732                         netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1733                         break;
1734                 }
1735                 buffer_info->dma = mapping;
1736                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1737                         ATL1C_PCIMAP_FROMDEVICE);
1738                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1739                 rfd_next_to_use = next_next;
1740                 if (++next_next == rfd_ring->count)
1741                         next_next = 0;
1742                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1743                 next_info = &rfd_ring->buffer_info[next_next];
1744                 num_alloc++;
1745         }
1746
1747         if (num_alloc) {
1748                 /* TODO: update mailbox here */
1749                 wmb();
1750                 rfd_ring->next_to_use = rfd_next_to_use;
1751                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1752                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1753         }
1754
1755         return num_alloc;
1756 }
1757
1758 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1759                         struct  atl1c_recv_ret_status *rrs, u16 num)
1760 {
1761         u16 i;
1762         /* the relationship between rrd and rfd is one map one */
1763         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1764                                         rrd_ring->next_to_clean)) {
1765                 rrs->word3 &= ~RRS_RXD_UPDATED;
1766                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1767                         rrd_ring->next_to_clean = 0;
1768         }
1769 }
1770
1771 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1772         struct atl1c_recv_ret_status *rrs, u16 num)
1773 {
1774         u16 i;
1775         u16 rfd_index;
1776         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1777
1778         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1779                         RRS_RX_RFD_INDEX_MASK;
1780         for (i = 0; i < num; i++) {
1781                 buffer_info[rfd_index].skb = NULL;
1782                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1783                                         ATL1C_BUFFER_FREE);
1784                 if (++rfd_index == rfd_ring->count)
1785                         rfd_index = 0;
1786         }
1787         rfd_ring->next_to_clean = rfd_index;
1788 }
1789
1790 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1791                    int *work_done, int work_to_do)
1792 {
1793         u16 rfd_num, rfd_index;
1794         u16 count = 0;
1795         u16 length;
1796         struct pci_dev *pdev = adapter->pdev;
1797         struct net_device *netdev  = adapter->netdev;
1798         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1799         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1800         struct sk_buff *skb;
1801         struct atl1c_recv_ret_status *rrs;
1802         struct atl1c_buffer *buffer_info;
1803
1804         while (1) {
1805                 if (*work_done >= work_to_do)
1806                         break;
1807                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1808                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1809                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1810                                 RRS_RX_RFD_CNT_MASK;
1811                         if (unlikely(rfd_num != 1))
1812                                 /* TODO support mul rfd*/
1813                                 if (netif_msg_rx_err(adapter))
1814                                         dev_warn(&pdev->dev,
1815                                                 "Multi rfd not support yet!\n");
1816                         goto rrs_checked;
1817                 } else {
1818                         break;
1819                 }
1820 rrs_checked:
1821                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1822                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1823                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1824                                 if (netif_msg_rx_err(adapter))
1825                                         dev_warn(&pdev->dev,
1826                                                 "wrong packet! rrs word3 is %x\n",
1827                                                 rrs->word3);
1828                         continue;
1829                 }
1830
1831                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1832                                 RRS_PKT_SIZE_MASK);
1833                 /* Good Receive */
1834                 if (likely(rfd_num == 1)) {
1835                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1836                                         RRS_RX_RFD_INDEX_MASK;
1837                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1838                         pci_unmap_single(pdev, buffer_info->dma,
1839                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1840                         skb = buffer_info->skb;
1841                 } else {
1842                         /* TODO */
1843                         if (netif_msg_rx_err(adapter))
1844                                 dev_warn(&pdev->dev,
1845                                         "Multi rfd not support yet!\n");
1846                         break;
1847                 }
1848                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1849                 skb_put(skb, length - ETH_FCS_LEN);
1850                 skb->protocol = eth_type_trans(skb, netdev);
1851                 atl1c_rx_checksum(adapter, skb, rrs);
1852                 if (rrs->word3 & RRS_VLAN_INS) {
1853                         u16 vlan;
1854
1855                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1856                         vlan = le16_to_cpu(vlan);
1857                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1858                 }
1859                 netif_receive_skb(skb);
1860
1861                 (*work_done)++;
1862                 count++;
1863         }
1864         if (count)
1865                 atl1c_alloc_rx_buffer(adapter);
1866 }
1867
1868 /**
1869  * atl1c_clean - NAPI Rx polling callback
1870  */
1871 static int atl1c_clean(struct napi_struct *napi, int budget)
1872 {
1873         struct atl1c_adapter *adapter =
1874                         container_of(napi, struct atl1c_adapter, napi);
1875         int work_done = 0;
1876
1877         /* Keep link state information with original netdev */
1878         if (!netif_carrier_ok(adapter->netdev))
1879                 goto quit_polling;
1880         /* just enable one RXQ */
1881         atl1c_clean_rx_irq(adapter, &work_done, budget);
1882
1883         if (work_done < budget) {
1884 quit_polling:
1885                 napi_complete(napi);
1886                 adapter->hw.intr_mask |= ISR_RX_PKT;
1887                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1888         }
1889         return work_done;
1890 }
1891
1892 #ifdef CONFIG_NET_POLL_CONTROLLER
1893
1894 /*
1895  * Polling 'interrupt' - used by things like netconsole to send skbs
1896  * without having to re-enable interrupts. It's not called while
1897  * the interrupt routine is executing.
1898  */
1899 static void atl1c_netpoll(struct net_device *netdev)
1900 {
1901         struct atl1c_adapter *adapter = netdev_priv(netdev);
1902
1903         disable_irq(adapter->pdev->irq);
1904         atl1c_intr(adapter->pdev->irq, netdev);
1905         enable_irq(adapter->pdev->irq);
1906 }
1907 #endif
1908
1909 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1910 {
1911         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1912         u16 next_to_use = 0;
1913         u16 next_to_clean = 0;
1914
1915         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1916         next_to_use   = tpd_ring->next_to_use;
1917
1918         return (u16)(next_to_clean > next_to_use) ?
1919                 (next_to_clean - next_to_use - 1) :
1920                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1921 }
1922
1923 /*
1924  * get next usable tpd
1925  * Note: should call atl1c_tdp_avail to make sure
1926  * there is enough tpd to use
1927  */
1928 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1929         enum atl1c_trans_queue type)
1930 {
1931         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1932         struct atl1c_tpd_desc *tpd_desc;
1933         u16 next_to_use = 0;
1934
1935         next_to_use = tpd_ring->next_to_use;
1936         if (++tpd_ring->next_to_use == tpd_ring->count)
1937                 tpd_ring->next_to_use = 0;
1938         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1939         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1940         return  tpd_desc;
1941 }
1942
1943 static struct atl1c_buffer *
1944 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1945 {
1946         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1947
1948         return &tpd_ring->buffer_info[tpd -
1949                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1950 }
1951
1952 /* Calculate the transmit packet descript needed*/
1953 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1954 {
1955         u16 tpd_req;
1956         u16 proto_hdr_len = 0;
1957
1958         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1959
1960         if (skb_is_gso(skb)) {
1961                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1962                 if (proto_hdr_len < skb_headlen(skb))
1963                         tpd_req++;
1964                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1965                         tpd_req++;
1966         }
1967         return tpd_req;
1968 }
1969
1970 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1971                           struct sk_buff *skb,
1972                           struct atl1c_tpd_desc **tpd,
1973                           enum atl1c_trans_queue type)
1974 {
1975         struct pci_dev *pdev = adapter->pdev;
1976         unsigned short offload_type;
1977         u8 hdr_len;
1978         u32 real_len;
1979
1980         if (skb_is_gso(skb)) {
1981                 int err;
1982
1983                 err = skb_cow_head(skb, 0);
1984                 if (err < 0)
1985                         return err;
1986
1987                 offload_type = skb_shinfo(skb)->gso_type;
1988
1989                 if (offload_type & SKB_GSO_TCPV4) {
1990                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1991                                         + ntohs(ip_hdr(skb)->tot_len));
1992
1993                         if (real_len < skb->len)
1994                                 pskb_trim(skb, real_len);
1995
1996                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
1997                         if (unlikely(skb->len == hdr_len)) {
1998                                 /* only xsum need */
1999                                 if (netif_msg_tx_queued(adapter))
2000                                         dev_warn(&pdev->dev,
2001                                                 "IPV4 tso with zero data??\n");
2002                                 goto check_sum;
2003                         } else {
2004                                 ip_hdr(skb)->check = 0;
2005                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2006                                                         ip_hdr(skb)->saddr,
2007                                                         ip_hdr(skb)->daddr,
2008                                                         0, IPPROTO_TCP, 0);
2009                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2010                         }
2011                 }
2012
2013                 if (offload_type & SKB_GSO_TCPV6) {
2014                         struct atl1c_tpd_ext_desc *etpd =
2015                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2016
2017                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2018                         *tpd = atl1c_get_tpd(adapter, type);
2019                         ipv6_hdr(skb)->payload_len = 0;
2020                         /* check payload == 0 byte ? */
2021                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2022                         if (unlikely(skb->len == hdr_len)) {
2023                                 /* only xsum need */
2024                                 if (netif_msg_tx_queued(adapter))
2025                                         dev_warn(&pdev->dev,
2026                                                 "IPV6 tso with zero data??\n");
2027                                 goto check_sum;
2028                         } else
2029                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2030                                                 &ipv6_hdr(skb)->saddr,
2031                                                 &ipv6_hdr(skb)->daddr,
2032                                                 0, IPPROTO_TCP, 0);
2033                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2034                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2035                         etpd->pkt_len = cpu_to_le32(skb->len);
2036                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2037                 }
2038
2039                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2040                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2041                                 TPD_TCPHDR_OFFSET_SHIFT;
2042                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2043                                 TPD_MSS_SHIFT;
2044                 return 0;
2045         }
2046
2047 check_sum:
2048         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2049                 u8 css, cso;
2050                 cso = skb_checksum_start_offset(skb);
2051
2052                 if (unlikely(cso & 0x1)) {
2053                         if (netif_msg_tx_err(adapter))
2054                                 dev_err(&adapter->pdev->dev,
2055                                         "payload offset should not an event number\n");
2056                         return -1;
2057                 } else {
2058                         css = cso + skb->csum_offset;
2059
2060                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2061                                         TPD_PLOADOFFSET_SHIFT;
2062                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2063                                         TPD_CCSUM_OFFSET_SHIFT;
2064                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2065                 }
2066         }
2067         return 0;
2068 }
2069
2070 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2071                               struct atl1c_tpd_desc *first_tpd,
2072                               enum atl1c_trans_queue type)
2073 {
2074         struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2075         struct atl1c_buffer *buffer_info;
2076         struct atl1c_tpd_desc *tpd;
2077         u16 first_index, index;
2078
2079         first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2080         index = first_index;
2081         while (index != tpd_ring->next_to_use) {
2082                 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2083                 buffer_info = &tpd_ring->buffer_info[index];
2084                 atl1c_clean_buffer(adpt->pdev, buffer_info);
2085                 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2086                 if (++index == tpd_ring->count)
2087                         index = 0;
2088         }
2089         tpd_ring->next_to_use = first_index;
2090 }
2091
2092 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2093                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2094                         enum atl1c_trans_queue type)
2095 {
2096         struct atl1c_tpd_desc *use_tpd = NULL;
2097         struct atl1c_buffer *buffer_info = NULL;
2098         u16 buf_len = skb_headlen(skb);
2099         u16 map_len = 0;
2100         u16 mapped_len = 0;
2101         u16 hdr_len = 0;
2102         u16 nr_frags;
2103         u16 f;
2104         int tso;
2105
2106         nr_frags = skb_shinfo(skb)->nr_frags;
2107         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2108         if (tso) {
2109                 /* TSO */
2110                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2111                 use_tpd = tpd;
2112
2113                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2114                 buffer_info->length = map_len;
2115                 buffer_info->dma = pci_map_single(adapter->pdev,
2116                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2117                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2118                                                    buffer_info->dma)))
2119                         goto err_dma;
2120                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2121                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2122                         ATL1C_PCIMAP_TODEVICE);
2123                 mapped_len += map_len;
2124                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2125                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2126         }
2127
2128         if (mapped_len < buf_len) {
2129                 /* mapped_len == 0, means we should use the first tpd,
2130                    which is given by caller  */
2131                 if (mapped_len == 0)
2132                         use_tpd = tpd;
2133                 else {
2134                         use_tpd = atl1c_get_tpd(adapter, type);
2135                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2136                 }
2137                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2138                 buffer_info->length = buf_len - mapped_len;
2139                 buffer_info->dma =
2140                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2141                                         buffer_info->length, PCI_DMA_TODEVICE);
2142                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2143                                                    buffer_info->dma)))
2144                         goto err_dma;
2145
2146                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2147                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2148                         ATL1C_PCIMAP_TODEVICE);
2149                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2150                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2151         }
2152
2153         for (f = 0; f < nr_frags; f++) {
2154                 struct skb_frag_struct *frag;
2155
2156                 frag = &skb_shinfo(skb)->frags[f];
2157
2158                 use_tpd = atl1c_get_tpd(adapter, type);
2159                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2160
2161                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2162                 buffer_info->length = skb_frag_size(frag);
2163                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2164                                                     frag, 0,
2165                                                     buffer_info->length,
2166                                                     DMA_TO_DEVICE);
2167                 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2168                         goto err_dma;
2169
2170                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2171                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2172                         ATL1C_PCIMAP_TODEVICE);
2173                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2174                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2175         }
2176
2177         /* The last tpd */
2178         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2179         /* The last buffer info contain the skb address,
2180            so it will be free after unmap */
2181         buffer_info->skb = skb;
2182
2183         return 0;
2184
2185 err_dma:
2186         buffer_info->dma = 0;
2187         buffer_info->length = 0;
2188         return -1;
2189 }
2190
2191 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2192                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2193 {
2194         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2195         u16 reg;
2196
2197         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2198         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2199 }
2200
2201 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2202                                           struct net_device *netdev)
2203 {
2204         struct atl1c_adapter *adapter = netdev_priv(netdev);
2205         unsigned long flags;
2206         u16 tpd_req = 1;
2207         struct atl1c_tpd_desc *tpd;
2208         enum atl1c_trans_queue type = atl1c_trans_normal;
2209
2210         if (test_bit(__AT_DOWN, &adapter->flags)) {
2211                 dev_kfree_skb_any(skb);
2212                 return NETDEV_TX_OK;
2213         }
2214
2215         tpd_req = atl1c_cal_tpd_req(skb);
2216         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2217                 if (netif_msg_pktdata(adapter))
2218                         dev_info(&adapter->pdev->dev, "tx locked\n");
2219                 return NETDEV_TX_LOCKED;
2220         }
2221
2222         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2223                 /* no enough descriptor, just stop queue */
2224                 netif_stop_queue(netdev);
2225                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2226                 return NETDEV_TX_BUSY;
2227         }
2228
2229         tpd = atl1c_get_tpd(adapter, type);
2230
2231         /* do TSO and check sum */
2232         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2233                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2234                 dev_kfree_skb_any(skb);
2235                 return NETDEV_TX_OK;
2236         }
2237
2238         if (unlikely(vlan_tx_tag_present(skb))) {
2239                 u16 vlan = vlan_tx_tag_get(skb);
2240                 __le16 tag;
2241
2242                 vlan = cpu_to_le16(vlan);
2243                 AT_VLAN_TO_TAG(vlan, tag);
2244                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2245                 tpd->vlan_tag = tag;
2246         }
2247
2248         if (skb_network_offset(skb) != ETH_HLEN)
2249                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2250
2251         if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2252                 netif_info(adapter, tx_done, adapter->netdev,
2253                            "tx-skb droppted due to dma error\n");
2254                 /* roll back tpd/buffer */
2255                 atl1c_tx_rollback(adapter, tpd, type);
2256                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2257                 dev_kfree_skb_any(skb);
2258         } else {
2259                 atl1c_tx_queue(adapter, skb, tpd, type);
2260                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2261         }
2262
2263         return NETDEV_TX_OK;
2264 }
2265
2266 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2267 {
2268         struct net_device *netdev = adapter->netdev;
2269
2270         free_irq(adapter->pdev->irq, netdev);
2271
2272         if (adapter->have_msi)
2273                 pci_disable_msi(adapter->pdev);
2274 }
2275
2276 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2277 {
2278         struct pci_dev    *pdev   = adapter->pdev;
2279         struct net_device *netdev = adapter->netdev;
2280         int flags = 0;
2281         int err = 0;
2282
2283         adapter->have_msi = true;
2284         err = pci_enable_msi(adapter->pdev);
2285         if (err) {
2286                 if (netif_msg_ifup(adapter))
2287                         dev_err(&pdev->dev,
2288                                 "Unable to allocate MSI interrupt Error: %d\n",
2289                                 err);
2290                 adapter->have_msi = false;
2291         }
2292
2293         if (!adapter->have_msi)
2294                 flags |= IRQF_SHARED;
2295         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2296                         netdev->name, netdev);
2297         if (err) {
2298                 if (netif_msg_ifup(adapter))
2299                         dev_err(&pdev->dev,
2300                                 "Unable to allocate interrupt Error: %d\n",
2301                                 err);
2302                 if (adapter->have_msi)
2303                         pci_disable_msi(adapter->pdev);
2304                 return err;
2305         }
2306         if (netif_msg_ifup(adapter))
2307                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2308         return err;
2309 }
2310
2311
2312 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2313 {
2314         /* release tx-pending skbs and reset tx/rx ring index */
2315         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2316         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2317         atl1c_clean_rx_ring(adapter);
2318 }
2319
2320 static int atl1c_up(struct atl1c_adapter *adapter)
2321 {
2322         struct net_device *netdev = adapter->netdev;
2323         int err;
2324
2325         netif_carrier_off(netdev);
2326
2327         err = atl1c_configure(adapter);
2328         if (unlikely(err))
2329                 goto err_up;
2330
2331         err = atl1c_request_irq(adapter);
2332         if (unlikely(err))
2333                 goto err_up;
2334
2335         atl1c_check_link_status(adapter);
2336         clear_bit(__AT_DOWN, &adapter->flags);
2337         napi_enable(&adapter->napi);
2338         atl1c_irq_enable(adapter);
2339         netif_start_queue(netdev);
2340         return err;
2341
2342 err_up:
2343         atl1c_clean_rx_ring(adapter);
2344         return err;
2345 }
2346
2347 static void atl1c_down(struct atl1c_adapter *adapter)
2348 {
2349         struct net_device *netdev = adapter->netdev;
2350
2351         atl1c_del_timer(adapter);
2352         adapter->work_event = 0; /* clear all event */
2353         /* signal that we're down so the interrupt handler does not
2354          * reschedule our watchdog timer */
2355         set_bit(__AT_DOWN, &adapter->flags);
2356         netif_carrier_off(netdev);
2357         napi_disable(&adapter->napi);
2358         atl1c_irq_disable(adapter);
2359         atl1c_free_irq(adapter);
2360         /* disable ASPM if device inactive */
2361         atl1c_disable_l0s_l1(&adapter->hw);
2362         /* reset MAC to disable all RX/TX */
2363         atl1c_reset_mac(&adapter->hw);
2364         msleep(1);
2365
2366         adapter->link_speed = SPEED_0;
2367         adapter->link_duplex = -1;
2368         atl1c_reset_dma_ring(adapter);
2369 }
2370
2371 /**
2372  * atl1c_open - Called when a network interface is made active
2373  * @netdev: network interface device structure
2374  *
2375  * Returns 0 on success, negative value on failure
2376  *
2377  * The open entry point is called when a network interface is made
2378  * active by the system (IFF_UP).  At this point all resources needed
2379  * for transmit and receive operations are allocated, the interrupt
2380  * handler is registered with the OS, the watchdog timer is started,
2381  * and the stack is notified that the interface is ready.
2382  */
2383 static int atl1c_open(struct net_device *netdev)
2384 {
2385         struct atl1c_adapter *adapter = netdev_priv(netdev);
2386         int err;
2387
2388         /* disallow open during test */
2389         if (test_bit(__AT_TESTING, &adapter->flags))
2390                 return -EBUSY;
2391
2392         /* allocate rx/tx dma buffer & descriptors */
2393         err = atl1c_setup_ring_resources(adapter);
2394         if (unlikely(err))
2395                 return err;
2396
2397         err = atl1c_up(adapter);
2398         if (unlikely(err))
2399                 goto err_up;
2400
2401         return 0;
2402
2403 err_up:
2404         atl1c_free_irq(adapter);
2405         atl1c_free_ring_resources(adapter);
2406         atl1c_reset_mac(&adapter->hw);
2407         return err;
2408 }
2409
2410 /**
2411  * atl1c_close - Disables a network interface
2412  * @netdev: network interface device structure
2413  *
2414  * Returns 0, this is not allowed to fail
2415  *
2416  * The close entry point is called when an interface is de-activated
2417  * by the OS.  The hardware is still under the drivers control, but
2418  * needs to be disabled.  A global MAC reset is issued to stop the
2419  * hardware, and all transmit and receive resources are freed.
2420  */
2421 static int atl1c_close(struct net_device *netdev)
2422 {
2423         struct atl1c_adapter *adapter = netdev_priv(netdev);
2424
2425         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2426         set_bit(__AT_DOWN, &adapter->flags);
2427         cancel_work_sync(&adapter->common_task);
2428         atl1c_down(adapter);
2429         atl1c_free_ring_resources(adapter);
2430         return 0;
2431 }
2432
2433 static int atl1c_suspend(struct device *dev)
2434 {
2435         struct pci_dev *pdev = to_pci_dev(dev);
2436         struct net_device *netdev = pci_get_drvdata(pdev);
2437         struct atl1c_adapter *adapter = netdev_priv(netdev);
2438         struct atl1c_hw *hw = &adapter->hw;
2439         u32 wufc = adapter->wol;
2440
2441         atl1c_disable_l0s_l1(hw);
2442         if (netif_running(netdev)) {
2443                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2444                 atl1c_down(adapter);
2445         }
2446         netif_device_detach(netdev);
2447
2448         if (wufc)
2449                 if (atl1c_phy_to_ps_link(hw) != 0)
2450                         dev_dbg(&pdev->dev, "phy power saving failed");
2451
2452         atl1c_power_saving(hw, wufc);
2453
2454         return 0;
2455 }
2456
2457 #ifdef CONFIG_PM_SLEEP
2458 static int atl1c_resume(struct device *dev)
2459 {
2460         struct pci_dev *pdev = to_pci_dev(dev);
2461         struct net_device *netdev = pci_get_drvdata(pdev);
2462         struct atl1c_adapter *adapter = netdev_priv(netdev);
2463
2464         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2465         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2466
2467         atl1c_phy_reset(&adapter->hw);
2468         atl1c_reset_mac(&adapter->hw);
2469         atl1c_phy_init(&adapter->hw);
2470
2471 #if 0
2472         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2473         pm_data &= ~PM_CTRLSTAT_PME_EN;
2474         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2475 #endif
2476
2477         netif_device_attach(netdev);
2478         if (netif_running(netdev))
2479                 atl1c_up(adapter);
2480
2481         return 0;
2482 }
2483 #endif
2484
2485 static void atl1c_shutdown(struct pci_dev *pdev)
2486 {
2487         struct net_device *netdev = pci_get_drvdata(pdev);
2488         struct atl1c_adapter *adapter = netdev_priv(netdev);
2489
2490         atl1c_suspend(&pdev->dev);
2491         pci_wake_from_d3(pdev, adapter->wol);
2492         pci_set_power_state(pdev, PCI_D3hot);
2493 }
2494
2495 static const struct net_device_ops atl1c_netdev_ops = {
2496         .ndo_open               = atl1c_open,
2497         .ndo_stop               = atl1c_close,
2498         .ndo_validate_addr      = eth_validate_addr,
2499         .ndo_start_xmit         = atl1c_xmit_frame,
2500         .ndo_set_mac_address    = atl1c_set_mac_addr,
2501         .ndo_set_rx_mode        = atl1c_set_multi,
2502         .ndo_change_mtu         = atl1c_change_mtu,
2503         .ndo_fix_features       = atl1c_fix_features,
2504         .ndo_set_features       = atl1c_set_features,
2505         .ndo_do_ioctl           = atl1c_ioctl,
2506         .ndo_tx_timeout         = atl1c_tx_timeout,
2507         .ndo_get_stats          = atl1c_get_stats,
2508 #ifdef CONFIG_NET_POLL_CONTROLLER
2509         .ndo_poll_controller    = atl1c_netpoll,
2510 #endif
2511 };
2512
2513 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2514 {
2515         SET_NETDEV_DEV(netdev, &pdev->dev);
2516         pci_set_drvdata(pdev, netdev);
2517
2518         netdev->netdev_ops = &atl1c_netdev_ops;
2519         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2520         atl1c_set_ethtool_ops(netdev);
2521
2522         /* TODO: add when ready */
2523         netdev->hw_features =   NETIF_F_SG              |
2524                                 NETIF_F_HW_CSUM         |
2525                                 NETIF_F_HW_VLAN_CTAG_RX |
2526                                 NETIF_F_TSO             |
2527                                 NETIF_F_TSO6;
2528         netdev->features =      netdev->hw_features     |
2529                                 NETIF_F_HW_VLAN_CTAG_TX;
2530         return 0;
2531 }
2532
2533 /**
2534  * atl1c_probe - Device Initialization Routine
2535  * @pdev: PCI device information struct
2536  * @ent: entry in atl1c_pci_tbl
2537  *
2538  * Returns 0 on success, negative on failure
2539  *
2540  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2541  * The OS initialization, configuring of the adapter private structure,
2542  * and a hardware reset occur.
2543  */
2544 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2545 {
2546         struct net_device *netdev;
2547         struct atl1c_adapter *adapter;
2548         static int cards_found;
2549
2550         int err = 0;
2551
2552         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2553         err = pci_enable_device_mem(pdev);
2554         if (err) {
2555                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2556                 return err;
2557         }
2558
2559         /*
2560          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2561          * shared register for the high 32 bits, so only a single, aligned,
2562          * 4 GB physical address range can be used at a time.
2563          *
2564          * Supporting 64-bit DMA on this hardware is more trouble than it's
2565          * worth.  It is far easier to limit to 32-bit DMA than update
2566          * various kernel subsystems to support the mechanics required by a
2567          * fixed-high-32-bit system.
2568          */
2569         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2570             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2571                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2572                 goto err_dma;
2573         }
2574
2575         err = pci_request_regions(pdev, atl1c_driver_name);
2576         if (err) {
2577                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2578                 goto err_pci_reg;
2579         }
2580
2581         pci_set_master(pdev);
2582
2583         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2584         if (netdev == NULL) {
2585                 err = -ENOMEM;
2586                 goto err_alloc_etherdev;
2587         }
2588
2589         err = atl1c_init_netdev(netdev, pdev);
2590         if (err) {
2591                 dev_err(&pdev->dev, "init netdevice failed\n");
2592                 goto err_init_netdev;
2593         }
2594         adapter = netdev_priv(netdev);
2595         adapter->bd_number = cards_found;
2596         adapter->netdev = netdev;
2597         adapter->pdev = pdev;
2598         adapter->hw.adapter = adapter;
2599         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2600         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2601         if (!adapter->hw.hw_addr) {
2602                 err = -EIO;
2603                 dev_err(&pdev->dev, "cannot map device registers\n");
2604                 goto err_ioremap;
2605         }
2606
2607         /* init mii data */
2608         adapter->mii.dev = netdev;
2609         adapter->mii.mdio_read  = atl1c_mdio_read;
2610         adapter->mii.mdio_write = atl1c_mdio_write;
2611         adapter->mii.phy_id_mask = 0x1f;
2612         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2613         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2614         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2615                         (unsigned long)adapter);
2616         /* setup the private structure */
2617         err = atl1c_sw_init(adapter);
2618         if (err) {
2619                 dev_err(&pdev->dev, "net device private data init failed\n");
2620                 goto err_sw_init;
2621         }
2622         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2623
2624         /* Init GPHY as early as possible due to power saving issue  */
2625         atl1c_phy_reset(&adapter->hw);
2626
2627         err = atl1c_reset_mac(&adapter->hw);
2628         if (err) {
2629                 err = -EIO;
2630                 goto err_reset;
2631         }
2632
2633         /* reset the controller to
2634          * put the device in a known good starting state */
2635         err = atl1c_phy_init(&adapter->hw);
2636         if (err) {
2637                 err = -EIO;
2638                 goto err_reset;
2639         }
2640         if (atl1c_read_mac_addr(&adapter->hw)) {
2641                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2642                 netdev->addr_assign_type = NET_ADDR_RANDOM;
2643         }
2644         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2645         if (netif_msg_probe(adapter))
2646                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2647                         adapter->hw.mac_addr);
2648
2649         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2650         INIT_WORK(&adapter->common_task, atl1c_common_task);
2651         adapter->work_event = 0;
2652         err = register_netdev(netdev);
2653         if (err) {
2654                 dev_err(&pdev->dev, "register netdevice failed\n");
2655                 goto err_register;
2656         }
2657
2658         if (netif_msg_probe(adapter))
2659                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2660         cards_found++;
2661         return 0;
2662
2663 err_reset:
2664 err_register:
2665 err_sw_init:
2666         iounmap(adapter->hw.hw_addr);
2667 err_init_netdev:
2668 err_ioremap:
2669         free_netdev(netdev);
2670 err_alloc_etherdev:
2671         pci_release_regions(pdev);
2672 err_pci_reg:
2673 err_dma:
2674         pci_disable_device(pdev);
2675         return err;
2676 }
2677
2678 /**
2679  * atl1c_remove - Device Removal Routine
2680  * @pdev: PCI device information struct
2681  *
2682  * atl1c_remove is called by the PCI subsystem to alert the driver
2683  * that it should release a PCI device.  The could be caused by a
2684  * Hot-Plug event, or because the driver is going to be removed from
2685  * memory.
2686  */
2687 static void atl1c_remove(struct pci_dev *pdev)
2688 {
2689         struct net_device *netdev = pci_get_drvdata(pdev);
2690         struct atl1c_adapter *adapter = netdev_priv(netdev);
2691
2692         unregister_netdev(netdev);
2693         /* restore permanent address */
2694         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2695         atl1c_phy_disable(&adapter->hw);
2696
2697         iounmap(adapter->hw.hw_addr);
2698
2699         pci_release_regions(pdev);
2700         pci_disable_device(pdev);
2701         free_netdev(netdev);
2702 }
2703
2704 /**
2705  * atl1c_io_error_detected - called when PCI error is detected
2706  * @pdev: Pointer to PCI device
2707  * @state: The current pci connection state
2708  *
2709  * This function is called after a PCI bus error affecting
2710  * this device has been detected.
2711  */
2712 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2713                                                 pci_channel_state_t state)
2714 {
2715         struct net_device *netdev = pci_get_drvdata(pdev);
2716         struct atl1c_adapter *adapter = netdev_priv(netdev);
2717
2718         netif_device_detach(netdev);
2719
2720         if (state == pci_channel_io_perm_failure)
2721                 return PCI_ERS_RESULT_DISCONNECT;
2722
2723         if (netif_running(netdev))
2724                 atl1c_down(adapter);
2725
2726         pci_disable_device(pdev);
2727
2728         /* Request a slot slot reset. */
2729         return PCI_ERS_RESULT_NEED_RESET;
2730 }
2731
2732 /**
2733  * atl1c_io_slot_reset - called after the pci bus has been reset.
2734  * @pdev: Pointer to PCI device
2735  *
2736  * Restart the card from scratch, as if from a cold-boot. Implementation
2737  * resembles the first-half of the e1000_resume routine.
2738  */
2739 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2740 {
2741         struct net_device *netdev = pci_get_drvdata(pdev);
2742         struct atl1c_adapter *adapter = netdev_priv(netdev);
2743
2744         if (pci_enable_device(pdev)) {
2745                 if (netif_msg_hw(adapter))
2746                         dev_err(&pdev->dev,
2747                                 "Cannot re-enable PCI device after reset\n");
2748                 return PCI_ERS_RESULT_DISCONNECT;
2749         }
2750         pci_set_master(pdev);
2751
2752         pci_enable_wake(pdev, PCI_D3hot, 0);
2753         pci_enable_wake(pdev, PCI_D3cold, 0);
2754
2755         atl1c_reset_mac(&adapter->hw);
2756
2757         return PCI_ERS_RESULT_RECOVERED;
2758 }
2759
2760 /**
2761  * atl1c_io_resume - called when traffic can start flowing again.
2762  * @pdev: Pointer to PCI device
2763  *
2764  * This callback is called when the error recovery driver tells us that
2765  * its OK to resume normal operation. Implementation resembles the
2766  * second-half of the atl1c_resume routine.
2767  */
2768 static void atl1c_io_resume(struct pci_dev *pdev)
2769 {
2770         struct net_device *netdev = pci_get_drvdata(pdev);
2771         struct atl1c_adapter *adapter = netdev_priv(netdev);
2772
2773         if (netif_running(netdev)) {
2774                 if (atl1c_up(adapter)) {
2775                         if (netif_msg_hw(adapter))
2776                                 dev_err(&pdev->dev,
2777                                         "Cannot bring device back up after reset\n");
2778                         return;
2779                 }
2780         }
2781
2782         netif_device_attach(netdev);
2783 }
2784
2785 static const struct pci_error_handlers atl1c_err_handler = {
2786         .error_detected = atl1c_io_error_detected,
2787         .slot_reset = atl1c_io_slot_reset,
2788         .resume = atl1c_io_resume,
2789 };
2790
2791 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2792
2793 static struct pci_driver atl1c_driver = {
2794         .name     = atl1c_driver_name,
2795         .id_table = atl1c_pci_tbl,
2796         .probe    = atl1c_probe,
2797         .remove   = atl1c_remove,
2798         .shutdown = atl1c_shutdown,
2799         .err_handler = &atl1c_err_handler,
2800         .driver.pm = &atl1c_pm_ops,
2801 };
2802
2803 module_pci_driver(atl1c_driver);