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 access 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         netdev_reset_queue(adapter->netdev);
 878
 879         /* Zero out Tx-buffers */
 880         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 881                 ring_count);
 882         atomic_set(&tpd_ring->next_to_clean, 0);
 883         tpd_ring->next_to_use = 0;
 884 }
 885
 886 /**
 887  * atl1c_clean_rx_ring - Free rx-reservation skbs
 888  * @adapter: board private structure
 889  */
 890 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 891 {
 892         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 893         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 894         struct atl1c_buffer *buffer_info;
 895         struct pci_dev *pdev = adapter->pdev;
 896         int j;
 897
 898         for (j = 0; j < rfd_ring->count; j++) {
 899                 buffer_info = &rfd_ring->buffer_info[j];
 900                 atl1c_clean_buffer(pdev, buffer_info);
 901         }
 902         /* zero out the descriptor ring */
 903         memset(rfd_ring->desc, 0, rfd_ring->size);
 904         rfd_ring->next_to_clean = 0;
 905         rfd_ring->next_to_use = 0;
 906         rrd_ring->next_to_use = 0;
 907         rrd_ring->next_to_clean = 0;
 908 }
 909
 910 /*
 911  * Read / Write Ptr Initialize:
 912  */
 913 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 914 {
 915         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 916         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 917         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 918         struct atl1c_buffer *buffer_info;
 919         int i, j;
 920
 921         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 922                 tpd_ring[i].next_to_use = 0;
 923                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 924                 buffer_info = tpd_ring[i].buffer_info;
 925                 for (j = 0; j < tpd_ring->count; j++)
 926                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 927                                         ATL1C_BUFFER_FREE);
 928         }
 929         rfd_ring->next_to_use = 0;
 930         rfd_ring->next_to_clean = 0;
 931         rrd_ring->next_to_use = 0;
 932         rrd_ring->next_to_clean = 0;
 933         for (j = 0; j < rfd_ring->count; j++) {
 934                 buffer_info = &rfd_ring->buffer_info[j];
 935                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 936         }
 937 }
 938
 939 /**
 940  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 941  * @adapter: board private structure
 942  *
 943  * Free all transmit software resources
 944  */
 945 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 946 {
 947         struct pci_dev *pdev = adapter->pdev;
 948
 949         pci_free_consistent(pdev, adapter->ring_header.size,
 950                                         adapter->ring_header.desc,
 951                                         adapter->ring_header.dma);
 952         adapter->ring_header.desc = NULL;
 953
 954         /* Note: just free tdp_ring.buffer_info,
 955         *  it contain rfd_ring.buffer_info, do not double free */
 956         if (adapter->tpd_ring[0].buffer_info) {
 957                 kfree(adapter->tpd_ring[0].buffer_info);
 958                 adapter->tpd_ring[0].buffer_info = NULL;
 959         }
 960         if (adapter->rx_page) {
 961                 put_page(adapter->rx_page);
 962                 adapter->rx_page = NULL;
 963         }
 964 }
 965
 966 /**
 967  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 968  * @adapter: board private structure
 969  *
 970  * Return 0 on success, negative on failure
 971  */
 972 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 973 {
 974         struct pci_dev *pdev = adapter->pdev;
 975         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 976         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 977         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 978         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 979         int size;
 980         int i;
 981         int count = 0;
 982         int rx_desc_count = 0;
 983         u32 offset = 0;
 984
 985         rrd_ring->count = rfd_ring->count;
 986         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 987                 tpd_ring[i].count = tpd_ring[0].count;
 988
 989         /* 2 tpd queue, one high priority queue,
 990          * another normal priority queue */
 991         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 992                 rfd_ring->count);
 993         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 994         if (unlikely(!tpd_ring->buffer_info))
 995                 goto err_nomem;
 996
 997         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 998                 tpd_ring[i].buffer_info =
 999                         (tpd_ring->buffer_info + count);
1000                 count += tpd_ring[i].count;
1001         }
1002
1003         rfd_ring->buffer_info =
1004                 (tpd_ring->buffer_info + count);
1005         count += rfd_ring->count;
1006         rx_desc_count += rfd_ring->count;
1007
1008         /*
1009          * real ring DMA buffer
1010          * each ring/block may need up to 8 bytes for alignment, hence the
1011          * additional bytes tacked onto the end.
1012          */
1013         ring_header->size = size =
1014                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1015                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1016                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1017                 8 * 4;
1018
1019         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
1020                                 &ring_header->dma);
1021         if (unlikely(!ring_header->desc)) {
1022                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
1023                 goto err_nomem;
1024         }
1025         memset(ring_header->desc, 0, ring_header->size);
1026         /* init TPD ring */
1027
1028         tpd_ring[0].dma = roundup(ring_header->dma, 8);
1029         offset = tpd_ring[0].dma - ring_header->dma;
1030         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1031                 tpd_ring[i].dma = ring_header->dma + offset;
1032                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1033                 tpd_ring[i].size =
1034                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1035                 offset += roundup(tpd_ring[i].size, 8);
1036         }
1037         /* init RFD ring */
1038         rfd_ring->dma = ring_header->dma + offset;
1039         rfd_ring->desc = (u8 *) ring_header->desc + offset;
1040         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1041         offset += roundup(rfd_ring->size, 8);
1042
1043         /* init RRD ring */
1044         rrd_ring->dma = ring_header->dma + offset;
1045         rrd_ring->desc = (u8 *) ring_header->desc + offset;
1046         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1047                 rrd_ring->count;
1048         offset += roundup(rrd_ring->size, 8);
1049
1050         return 0;
1051
1052 err_nomem:
1053         kfree(tpd_ring->buffer_info);
1054         return -ENOMEM;
1055 }
1056
1057 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1058 {
1059         struct atl1c_hw *hw = &adapter->hw;
1060         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1061         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1062         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1063                                 adapter->tpd_ring;
1064
1065         /* TPD */
1066         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1067                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1068                                 AT_DMA_HI_ADDR_MASK) >> 32));
1069         /* just enable normal priority TX queue */
1070         AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1071                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1072                                 AT_DMA_LO_ADDR_MASK));
1073         AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1074                         (u32)(tpd_ring[atl1c_trans_high].dma &
1075                                 AT_DMA_LO_ADDR_MASK));
1076         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1077                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1078
1079
1080         /* RFD */
1081         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1082                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1083         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1084                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1085
1086         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1087                         rfd_ring->count & RFD_RING_SIZE_MASK);
1088         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1089                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1090
1091         /* RRD */
1092         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1093                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1094         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1095                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1096
1097         if (hw->nic_type == athr_l2c_b) {
1098                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1099                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1100                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1101                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1102                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1103                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1104                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1105                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1106         }
1107         /* Load all of base address above */
1108         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1109 }
1110
1111 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1112 {
1113         struct atl1c_hw *hw = &adapter->hw;
1114         int max_pay_load;
1115         u16 tx_offload_thresh;
1116         u32 txq_ctrl_data;
1117
1118         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1119         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1120                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1121         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1122         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1123         /*
1124          * if BIOS had changed the dam-read-max-length to an invalid value,
1125          * restore it to default value
1126          */
1127         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1128                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1129                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1130         }
1131         txq_ctrl_data =
1132                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1133                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1134
1135         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1136 }
1137
1138 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1139 {
1140         struct atl1c_hw *hw = &adapter->hw;
1141         u32 rxq_ctrl_data;
1142
1143         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1144                         RXQ_RFD_BURST_NUM_SHIFT;
1145
1146         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1147                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1148
1149         /* aspm for gigabit */
1150         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1151                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1152                         ASPM_THRUPUT_LIMIT_100M);
1153
1154         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1155 }
1156
1157 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1158 {
1159         struct atl1c_hw *hw = &adapter->hw;
1160         u32 dma_ctrl_data;
1161
1162         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1163                 DMA_CTRL_RREQ_PRI_DATA |
1164                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1165                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1166                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1167
1168         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1169 }
1170
1171 /*
1172  * Stop the mac, transmit and receive units
1173  * hw - Struct containing variables accessed by shared code
1174  * return : 0  or  idle status (if error)
1175  */
1176 static int atl1c_stop_mac(struct atl1c_hw *hw)
1177 {
1178         u32 data;
1179
1180         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1181         data &= ~RXQ_CTRL_EN;
1182         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1183
1184         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1185         data &= ~TXQ_CTRL_EN;
1186         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1187
1188         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1189
1190         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1191         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1192         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1193
1194         return (int)atl1c_wait_until_idle(hw,
1195                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1196 }
1197
1198 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1199 {
1200         struct atl1c_hw *hw = &adapter->hw;
1201         u32 mac, txq, rxq;
1202
1203         hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1204         hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1205                 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1206
1207         AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1208         AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1209         AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1210
1211         txq |= TXQ_CTRL_EN;
1212         rxq |= RXQ_CTRL_EN;
1213         mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1214                MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1215                MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1216                MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1217                MAC_CTRL_HASH_ALG_CRC32;
1218         if (hw->mac_duplex)
1219                 mac |= MAC_CTRL_DUPLX;
1220         else
1221                 mac &= ~MAC_CTRL_DUPLX;
1222         mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1223         mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1224
1225         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1226         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1227         AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1228 }
1229
1230 /*
1231  * Reset the transmit and receive units; mask and clear all interrupts.
1232  * hw - Struct containing variables accessed by shared code
1233  * return : 0  or  idle status (if error)
1234  */
1235 static int atl1c_reset_mac(struct atl1c_hw *hw)
1236 {
1237         struct atl1c_adapter *adapter = hw->adapter;
1238         struct pci_dev *pdev = adapter->pdev;
1239         u32 ctrl_data = 0;
1240
1241         atl1c_stop_mac(hw);
1242         /*
1243          * Issue Soft Reset to the MAC.  This will reset the chip's
1244          * transmit, receive, DMA.  It will not effect
1245          * the current PCI configuration.  The global reset bit is self-
1246          * clearing, and should clear within a microsecond.
1247          */
1248         AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1249         ctrl_data |= MASTER_CTRL_OOB_DIS;
1250         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1251
1252         AT_WRITE_FLUSH(hw);
1253         msleep(10);
1254         /* Wait at least 10ms for All module to be Idle */
1255
1256         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1257                 dev_err(&pdev->dev,
1258                         "MAC state machine can't be idle since"
1259                         " disabled for 10ms second\n");
1260                 return -1;
1261         }
1262         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1263
1264         /* driver control speed/duplex */
1265         AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1266         AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1267
1268         /* clk switch setting */
1269         AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1270         switch (hw->nic_type) {
1271         case athr_l2c_b:
1272                 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1273                                 SERDES_MAC_CLK_SLOWDOWN);
1274                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1275                 break;
1276         case athr_l2c_b2:
1277         case athr_l1d_2:
1278                 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1279                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1280                 break;
1281         default:
1282                 break;
1283         }
1284
1285         return 0;
1286 }
1287
1288 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1289 {
1290         u16 ctrl_flags = hw->ctrl_flags;
1291
1292         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1293         atl1c_set_aspm(hw, SPEED_0);
1294         hw->ctrl_flags = ctrl_flags;
1295 }
1296
1297 /*
1298  * Set ASPM state.
1299  * Enable/disable L0s/L1 depend on link state.
1300  */
1301 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1302 {
1303         u32 pm_ctrl_data;
1304         u32 link_l1_timer;
1305
1306         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1307         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1308                           PM_CTRL_ASPM_L0S_EN |
1309                           PM_CTRL_MAC_ASPM_CHK);
1310         /* L1 timer */
1311         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1312                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1313                 link_l1_timer =
1314                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1315                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1316                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1317                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1318         } else {
1319                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1320                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1321                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1322                         link_l1_timer = 1;
1323                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1324                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1325         }
1326
1327         /* L0S/L1 enable */
1328         if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1329                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1330         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1331                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1332
1333         /* l2cb & l1d & l2cb2 & l1d2 */
1334         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1335             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1336                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1337                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1338                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1339                                 PM_CTRL_SERDES_PD_EX_L1 |
1340                                 PM_CTRL_CLK_SWH_L1;
1341                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1342                                   PM_CTRL_SERDES_PLL_L1_EN |
1343                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1344                                   PM_CTRL_SA_DLY_EN |
1345                                   PM_CTRL_HOTRST);
1346                 /* disable l0s if link down or l2cb */
1347                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1348                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1349         } else { /* l1c */
1350                 pm_ctrl_data =
1351                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1352                 if (link_speed != SPEED_0) {
1353                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1354                                         PM_CTRL_SERDES_PLL_L1_EN |
1355                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1356                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1357                                           PM_CTRL_CLK_SWH_L1 |
1358                                           PM_CTRL_ASPM_L0S_EN |
1359                                           PM_CTRL_ASPM_L1_EN);
1360                 } else { /* link down */
1361                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1362                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1363                                           PM_CTRL_SERDES_PLL_L1_EN |
1364                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1365                                           PM_CTRL_ASPM_L0S_EN);
1366                 }
1367         }
1368         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1369
1370         return;
1371 }
1372
1373 /**
1374  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1375  * @adapter: board private structure
1376  *
1377  * Configure the Tx /Rx unit of the MAC after a reset.
1378  */
1379 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1380 {
1381         struct atl1c_hw *hw = &adapter->hw;
1382         u32 master_ctrl_data = 0;
1383         u32 intr_modrt_data;
1384         u32 data;
1385
1386         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1387         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1388                               MASTER_CTRL_RX_ITIMER_EN |
1389                               MASTER_CTRL_INT_RDCLR);
1390         /* clear interrupt status */
1391         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1392         /*  Clear any WOL status */
1393         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1394         /* set Interrupt Clear Timer
1395          * HW will enable self to assert interrupt event to system after
1396          * waiting x-time for software to notify it accept interrupt.
1397          */
1398
1399         data = CLK_GATING_EN_ALL;
1400         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1401                 if (hw->nic_type == athr_l2c_b)
1402                         data &= ~CLK_GATING_RXMAC_EN;
1403         } else
1404                 data = 0;
1405         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1406
1407         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1408                 hw->ict & INT_RETRIG_TIMER_MASK);
1409
1410         atl1c_configure_des_ring(adapter);
1411
1412         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1413                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1414                                         IRQ_MODRT_TX_TIMER_SHIFT;
1415                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1416                                         IRQ_MODRT_RX_TIMER_SHIFT;
1417                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1418                 master_ctrl_data |=
1419                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1420         }
1421
1422         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1423                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1424
1425         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1426         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1427
1428         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1429                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1430
1431         /* set MTU */
1432         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1433                         VLAN_HLEN + ETH_FCS_LEN);
1434
1435         atl1c_configure_tx(adapter);
1436         atl1c_configure_rx(adapter);
1437         atl1c_configure_dma(adapter);
1438
1439         return 0;
1440 }
1441
1442 static int atl1c_configure(struct atl1c_adapter *adapter)
1443 {
1444         struct net_device *netdev = adapter->netdev;
1445         int num;
1446
1447         atl1c_init_ring_ptrs(adapter);
1448         atl1c_set_multi(netdev);
1449         atl1c_restore_vlan(adapter);
1450
1451         num = atl1c_alloc_rx_buffer(adapter);
1452         if (unlikely(num == 0))
1453                 return -ENOMEM;
1454
1455         if (atl1c_configure_mac(adapter))
1456                 return -EIO;
1457
1458         return 0;
1459 }
1460
1461 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1462 {
1463         u16 hw_reg_addr = 0;
1464         unsigned long *stats_item = NULL;
1465         u32 data;
1466
1467         /* update rx status */
1468         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1469         stats_item  = &adapter->hw_stats.rx_ok;
1470         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1471                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1472                 *stats_item += data;
1473                 stats_item++;
1474                 hw_reg_addr += 4;
1475         }
1476 /* update tx status */
1477         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1478         stats_item  = &adapter->hw_stats.tx_ok;
1479         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1480                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1481                 *stats_item += data;
1482                 stats_item++;
1483                 hw_reg_addr += 4;
1484         }
1485 }
1486
1487 /**
1488  * atl1c_get_stats - Get System Network Statistics
1489  * @netdev: network interface device structure
1490  *
1491  * Returns the address of the device statistics structure.
1492  * The statistics are actually updated from the timer callback.
1493  */
1494 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1495 {
1496         struct atl1c_adapter *adapter = netdev_priv(netdev);
1497         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1498         struct net_device_stats *net_stats = &netdev->stats;
1499
1500         atl1c_update_hw_stats(adapter);
1501         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1502         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1503         net_stats->multicast  = hw_stats->rx_mcast;
1504         net_stats->collisions = hw_stats->tx_1_col +
1505                                 hw_stats->tx_2_col +
1506                                 hw_stats->tx_late_col +
1507                                 hw_stats->tx_abort_col;
1508
1509         net_stats->rx_errors  = hw_stats->rx_frag +
1510                                 hw_stats->rx_fcs_err +
1511                                 hw_stats->rx_len_err +
1512                                 hw_stats->rx_sz_ov +
1513                                 hw_stats->rx_rrd_ov +
1514                                 hw_stats->rx_align_err +
1515                                 hw_stats->rx_rxf_ov;
1516
1517         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1518         net_stats->rx_length_errors = hw_stats->rx_len_err;
1519         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1520         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1521         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1522
1523         net_stats->tx_errors = hw_stats->tx_late_col +
1524                                hw_stats->tx_abort_col +
1525                                hw_stats->tx_underrun +
1526                                hw_stats->tx_trunc;
1527
1528         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1529         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1530         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1531
1532         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1533         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1534
1535         return net_stats;
1536 }
1537
1538 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1539 {
1540         u16 phy_data;
1541
1542         spin_lock(&adapter->mdio_lock);
1543         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1544         spin_unlock(&adapter->mdio_lock);
1545 }
1546
1547 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1548                                 enum atl1c_trans_queue type)
1549 {
1550         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1551         struct atl1c_buffer *buffer_info;
1552         struct pci_dev *pdev = adapter->pdev;
1553         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1554         u16 hw_next_to_clean;
1555         u16 reg;
1556         unsigned int total_bytes = 0, total_packets = 0;
1557
1558         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1559
1560         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1561
1562         while (next_to_clean != hw_next_to_clean) {
1563                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1564                 if (buffer_info->skb) {
1565                         total_bytes += buffer_info->skb->len;
1566                         total_packets++;
1567                 }
1568                 atl1c_clean_buffer(pdev, buffer_info);
1569                 if (++next_to_clean == tpd_ring->count)
1570                         next_to_clean = 0;
1571                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1572         }
1573
1574         netdev_completed_queue(adapter->netdev, total_packets, total_bytes);
1575
1576         if (netif_queue_stopped(adapter->netdev) &&
1577                         netif_carrier_ok(adapter->netdev)) {
1578                 netif_wake_queue(adapter->netdev);
1579         }
1580
1581         return true;
1582 }
1583
1584 /**
1585  * atl1c_intr - Interrupt Handler
1586  * @irq: interrupt number
1587  * @data: pointer to a network interface device structure
1588  */
1589 static irqreturn_t atl1c_intr(int irq, void *data)
1590 {
1591         struct net_device *netdev  = data;
1592         struct atl1c_adapter *adapter = netdev_priv(netdev);
1593         struct pci_dev *pdev = adapter->pdev;
1594         struct atl1c_hw *hw = &adapter->hw;
1595         int max_ints = AT_MAX_INT_WORK;
1596         int handled = IRQ_NONE;
1597         u32 status;
1598         u32 reg_data;
1599
1600         do {
1601                 AT_READ_REG(hw, REG_ISR, &reg_data);
1602                 status = reg_data & hw->intr_mask;
1603
1604                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1605                         if (max_ints != AT_MAX_INT_WORK)
1606                                 handled = IRQ_HANDLED;
1607                         break;
1608                 }
1609                 /* link event */
1610                 if (status & ISR_GPHY)
1611                         atl1c_clear_phy_int(adapter);
1612                 /* Ack ISR */
1613                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1614                 if (status & ISR_RX_PKT) {
1615                         if (likely(napi_schedule_prep(&adapter->napi))) {
1616                                 hw->intr_mask &= ~ISR_RX_PKT;
1617                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1618                                 __napi_schedule(&adapter->napi);
1619                         }
1620                 }
1621                 if (status & ISR_TX_PKT)
1622                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1623
1624                 handled = IRQ_HANDLED;
1625                 /* check if PCIE PHY Link down */
1626                 if (status & ISR_ERROR) {
1627                         if (netif_msg_hw(adapter))
1628                                 dev_err(&pdev->dev,
1629                                         "atl1c hardware error (status = 0x%x)\n",
1630                                         status & ISR_ERROR);
1631                         /* reset MAC */
1632                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1633                         schedule_work(&adapter->common_task);
1634                         return IRQ_HANDLED;
1635                 }
1636
1637                 if (status & ISR_OVER)
1638                         if (netif_msg_intr(adapter))
1639                                 dev_warn(&pdev->dev,
1640                                         "TX/RX overflow (status = 0x%x)\n",
1641                                         status & ISR_OVER);
1642
1643                 /* link event */
1644                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1645                         netdev->stats.tx_carrier_errors++;
1646                         atl1c_link_chg_event(adapter);
1647                         break;
1648                 }
1649
1650         } while (--max_ints > 0);
1651         /* re-enable Interrupt*/
1652         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1653         return handled;
1654 }
1655
1656 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1657                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1658 {
1659         /*
1660          * The pid field in RRS in not correct sometimes, so we
1661          * cannot figure out if the packet is fragmented or not,
1662          * so we tell the KERNEL CHECKSUM_NONE
1663          */
1664         skb_checksum_none_assert(skb);
1665 }
1666
1667 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1668 {
1669         struct sk_buff *skb;
1670         struct page *page;
1671
1672         if (adapter->rx_frag_size > PAGE_SIZE)
1673                 return netdev_alloc_skb(adapter->netdev,
1674                                         adapter->rx_buffer_len);
1675
1676         page = adapter->rx_page;
1677         if (!page) {
1678                 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1679                 if (unlikely(!page))
1680                         return NULL;
1681                 adapter->rx_page_offset = 0;
1682         }
1683
1684         skb = build_skb(page_address(page) + adapter->rx_page_offset,
1685                         adapter->rx_frag_size);
1686         if (likely(skb)) {
1687                 adapter->rx_page_offset += adapter->rx_frag_size;
1688                 if (adapter->rx_page_offset >= PAGE_SIZE)
1689                         adapter->rx_page = NULL;
1690                 else
1691                         get_page(page);
1692         }
1693         return skb;
1694 }
1695
1696 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1697 {
1698         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1699         struct pci_dev *pdev = adapter->pdev;
1700         struct atl1c_buffer *buffer_info, *next_info;
1701         struct sk_buff *skb;
1702         void *vir_addr = NULL;
1703         u16 num_alloc = 0;
1704         u16 rfd_next_to_use, next_next;
1705         struct atl1c_rx_free_desc *rfd_desc;
1706         dma_addr_t mapping;
1707
1708         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1709         if (++next_next == rfd_ring->count)
1710                 next_next = 0;
1711         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1712         next_info = &rfd_ring->buffer_info[next_next];
1713
1714         while (next_info->flags & ATL1C_BUFFER_FREE) {
1715                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1716
1717                 skb = atl1c_alloc_skb(adapter);
1718                 if (unlikely(!skb)) {
1719                         if (netif_msg_rx_err(adapter))
1720                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1721                         break;
1722                 }
1723
1724                 /*
1725                  * Make buffer alignment 2 beyond a 16 byte boundary
1726                  * this will result in a 16 byte aligned IP header after
1727                  * the 14 byte MAC header is removed
1728                  */
1729                 vir_addr = skb->data;
1730                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1731                 buffer_info->skb = skb;
1732                 buffer_info->length = adapter->rx_buffer_len;
1733                 mapping = pci_map_single(pdev, vir_addr,
1734                                                 buffer_info->length,
1735                                                 PCI_DMA_FROMDEVICE);
1736                 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1737                         dev_kfree_skb(skb);
1738                         buffer_info->skb = NULL;
1739                         buffer_info->length = 0;
1740                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1741                         netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1742                         break;
1743                 }
1744                 buffer_info->dma = mapping;
1745                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1746                         ATL1C_PCIMAP_FROMDEVICE);
1747                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1748                 rfd_next_to_use = next_next;
1749                 if (++next_next == rfd_ring->count)
1750                         next_next = 0;
1751                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1752                 next_info = &rfd_ring->buffer_info[next_next];
1753                 num_alloc++;
1754         }
1755
1756         if (num_alloc) {
1757                 /* TODO: update mailbox here */
1758                 wmb();
1759                 rfd_ring->next_to_use = rfd_next_to_use;
1760                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1761                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1762         }
1763
1764         return num_alloc;
1765 }
1766
1767 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1768                         struct  atl1c_recv_ret_status *rrs, u16 num)
1769 {
1770         u16 i;
1771         /* the relationship between rrd and rfd is one map one */
1772         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1773                                         rrd_ring->next_to_clean)) {
1774                 rrs->word3 &= ~RRS_RXD_UPDATED;
1775                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1776                         rrd_ring->next_to_clean = 0;
1777         }
1778 }
1779
1780 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1781         struct atl1c_recv_ret_status *rrs, u16 num)
1782 {
1783         u16 i;
1784         u16 rfd_index;
1785         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1786
1787         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1788                         RRS_RX_RFD_INDEX_MASK;
1789         for (i = 0; i < num; i++) {
1790                 buffer_info[rfd_index].skb = NULL;
1791                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1792                                         ATL1C_BUFFER_FREE);
1793                 if (++rfd_index == rfd_ring->count)
1794                         rfd_index = 0;
1795         }
1796         rfd_ring->next_to_clean = rfd_index;
1797 }
1798
1799 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1800                    int *work_done, int work_to_do)
1801 {
1802         u16 rfd_num, rfd_index;
1803         u16 count = 0;
1804         u16 length;
1805         struct pci_dev *pdev = adapter->pdev;
1806         struct net_device *netdev  = adapter->netdev;
1807         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1808         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1809         struct sk_buff *skb;
1810         struct atl1c_recv_ret_status *rrs;
1811         struct atl1c_buffer *buffer_info;
1812
1813         while (1) {
1814                 if (*work_done >= work_to_do)
1815                         break;
1816                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1817                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1818                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1819                                 RRS_RX_RFD_CNT_MASK;
1820                         if (unlikely(rfd_num != 1))
1821                                 /* TODO support mul rfd*/
1822                                 if (netif_msg_rx_err(adapter))
1823                                         dev_warn(&pdev->dev,
1824                                                 "Multi rfd not support yet!\n");
1825                         goto rrs_checked;
1826                 } else {
1827                         break;
1828                 }
1829 rrs_checked:
1830                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1831                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1832                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1833                                 if (netif_msg_rx_err(adapter))
1834                                         dev_warn(&pdev->dev,
1835                                                 "wrong packet! rrs word3 is %x\n",
1836                                                 rrs->word3);
1837                         continue;
1838                 }
1839
1840                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1841                                 RRS_PKT_SIZE_MASK);
1842                 /* Good Receive */
1843                 if (likely(rfd_num == 1)) {
1844                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1845                                         RRS_RX_RFD_INDEX_MASK;
1846                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1847                         pci_unmap_single(pdev, buffer_info->dma,
1848                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1849                         skb = buffer_info->skb;
1850                 } else {
1851                         /* TODO */
1852                         if (netif_msg_rx_err(adapter))
1853                                 dev_warn(&pdev->dev,
1854                                         "Multi rfd not support yet!\n");
1855                         break;
1856                 }
1857                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1858                 skb_put(skb, length - ETH_FCS_LEN);
1859                 skb->protocol = eth_type_trans(skb, netdev);
1860                 atl1c_rx_checksum(adapter, skb, rrs);
1861                 if (rrs->word3 & RRS_VLAN_INS) {
1862                         u16 vlan;
1863
1864                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1865                         vlan = le16_to_cpu(vlan);
1866                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1867                 }
1868                 netif_receive_skb(skb);
1869
1870                 (*work_done)++;
1871                 count++;
1872         }
1873         if (count)
1874                 atl1c_alloc_rx_buffer(adapter);
1875 }
1876
1877 /**
1878  * atl1c_clean - NAPI Rx polling callback
1879  */
1880 static int atl1c_clean(struct napi_struct *napi, int budget)
1881 {
1882         struct atl1c_adapter *adapter =
1883                         container_of(napi, struct atl1c_adapter, napi);
1884         int work_done = 0;
1885
1886         /* Keep link state information with original netdev */
1887         if (!netif_carrier_ok(adapter->netdev))
1888                 goto quit_polling;
1889         /* just enable one RXQ */
1890         atl1c_clean_rx_irq(adapter, &work_done, budget);
1891
1892         if (work_done < budget) {
1893 quit_polling:
1894                 napi_complete(napi);
1895                 adapter->hw.intr_mask |= ISR_RX_PKT;
1896                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1897         }
1898         return work_done;
1899 }
1900
1901 #ifdef CONFIG_NET_POLL_CONTROLLER
1902
1903 /*
1904  * Polling 'interrupt' - used by things like netconsole to send skbs
1905  * without having to re-enable interrupts. It's not called while
1906  * the interrupt routine is executing.
1907  */
1908 static void atl1c_netpoll(struct net_device *netdev)
1909 {
1910         struct atl1c_adapter *adapter = netdev_priv(netdev);
1911
1912         disable_irq(adapter->pdev->irq);
1913         atl1c_intr(adapter->pdev->irq, netdev);
1914         enable_irq(adapter->pdev->irq);
1915 }
1916 #endif
1917
1918 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1919 {
1920         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1921         u16 next_to_use = 0;
1922         u16 next_to_clean = 0;
1923
1924         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1925         next_to_use   = tpd_ring->next_to_use;
1926
1927         return (u16)(next_to_clean > next_to_use) ?
1928                 (next_to_clean - next_to_use - 1) :
1929                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1930 }
1931
1932 /*
1933  * get next usable tpd
1934  * Note: should call atl1c_tdp_avail to make sure
1935  * there is enough tpd to use
1936  */
1937 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1938         enum atl1c_trans_queue type)
1939 {
1940         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1941         struct atl1c_tpd_desc *tpd_desc;
1942         u16 next_to_use = 0;
1943
1944         next_to_use = tpd_ring->next_to_use;
1945         if (++tpd_ring->next_to_use == tpd_ring->count)
1946                 tpd_ring->next_to_use = 0;
1947         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1948         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1949         return  tpd_desc;
1950 }
1951
1952 static struct atl1c_buffer *
1953 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1954 {
1955         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1956
1957         return &tpd_ring->buffer_info[tpd -
1958                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1959 }
1960
1961 /* Calculate the transmit packet descript needed*/
1962 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1963 {
1964         u16 tpd_req;
1965         u16 proto_hdr_len = 0;
1966
1967         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1968
1969         if (skb_is_gso(skb)) {
1970                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1971                 if (proto_hdr_len < skb_headlen(skb))
1972                         tpd_req++;
1973                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1974                         tpd_req++;
1975         }
1976         return tpd_req;
1977 }
1978
1979 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1980                           struct sk_buff *skb,
1981                           struct atl1c_tpd_desc **tpd,
1982                           enum atl1c_trans_queue type)
1983 {
1984         struct pci_dev *pdev = adapter->pdev;
1985         unsigned short offload_type;
1986         u8 hdr_len;
1987         u32 real_len;
1988
1989         if (skb_is_gso(skb)) {
1990                 int err;
1991
1992                 err = skb_cow_head(skb, 0);
1993                 if (err < 0)
1994                         return err;
1995
1996                 offload_type = skb_shinfo(skb)->gso_type;
1997
1998                 if (offload_type & SKB_GSO_TCPV4) {
1999                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2000                                         + ntohs(ip_hdr(skb)->tot_len));
2001
2002                         if (real_len < skb->len)
2003                                 pskb_trim(skb, real_len);
2004
2005                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2006                         if (unlikely(skb->len == hdr_len)) {
2007                                 /* only xsum need */
2008                                 if (netif_msg_tx_queued(adapter))
2009                                         dev_warn(&pdev->dev,
2010                                                 "IPV4 tso with zero data??\n");
2011                                 goto check_sum;
2012                         } else {
2013                                 ip_hdr(skb)->check = 0;
2014                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2015                                                         ip_hdr(skb)->saddr,
2016                                                         ip_hdr(skb)->daddr,
2017                                                         0, IPPROTO_TCP, 0);
2018                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2019                         }
2020                 }
2021
2022                 if (offload_type & SKB_GSO_TCPV6) {
2023                         struct atl1c_tpd_ext_desc *etpd =
2024                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2025
2026                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2027                         *tpd = atl1c_get_tpd(adapter, type);
2028                         ipv6_hdr(skb)->payload_len = 0;
2029                         /* check payload == 0 byte ? */
2030                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2031                         if (unlikely(skb->len == hdr_len)) {
2032                                 /* only xsum need */
2033                                 if (netif_msg_tx_queued(adapter))
2034                                         dev_warn(&pdev->dev,
2035                                                 "IPV6 tso with zero data??\n");
2036                                 goto check_sum;
2037                         } else
2038                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2039                                                 &ipv6_hdr(skb)->saddr,
2040                                                 &ipv6_hdr(skb)->daddr,
2041                                                 0, IPPROTO_TCP, 0);
2042                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2043                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2044                         etpd->pkt_len = cpu_to_le32(skb->len);
2045                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2046                 }
2047
2048                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2049                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2050                                 TPD_TCPHDR_OFFSET_SHIFT;
2051                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2052                                 TPD_MSS_SHIFT;
2053                 return 0;
2054         }
2055
2056 check_sum:
2057         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2058                 u8 css, cso;
2059                 cso = skb_checksum_start_offset(skb);
2060
2061                 if (unlikely(cso & 0x1)) {
2062                         if (netif_msg_tx_err(adapter))
2063                                 dev_err(&adapter->pdev->dev,
2064                                         "payload offset should not an event number\n");
2065                         return -1;
2066                 } else {
2067                         css = cso + skb->csum_offset;
2068
2069                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2070                                         TPD_PLOADOFFSET_SHIFT;
2071                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2072                                         TPD_CCSUM_OFFSET_SHIFT;
2073                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2074                 }
2075         }
2076         return 0;
2077 }
2078
2079 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2080                               struct atl1c_tpd_desc *first_tpd,
2081                               enum atl1c_trans_queue type)
2082 {
2083         struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2084         struct atl1c_buffer *buffer_info;
2085         struct atl1c_tpd_desc *tpd;
2086         u16 first_index, index;
2087
2088         first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2089         index = first_index;
2090         while (index != tpd_ring->next_to_use) {
2091                 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2092                 buffer_info = &tpd_ring->buffer_info[index];
2093                 atl1c_clean_buffer(adpt->pdev, buffer_info);
2094                 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2095                 if (++index == tpd_ring->count)
2096                         index = 0;
2097         }
2098         tpd_ring->next_to_use = first_index;
2099 }
2100
2101 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2102                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2103                         enum atl1c_trans_queue type)
2104 {
2105         struct atl1c_tpd_desc *use_tpd = NULL;
2106         struct atl1c_buffer *buffer_info = NULL;
2107         u16 buf_len = skb_headlen(skb);
2108         u16 map_len = 0;
2109         u16 mapped_len = 0;
2110         u16 hdr_len = 0;
2111         u16 nr_frags;
2112         u16 f;
2113         int tso;
2114
2115         nr_frags = skb_shinfo(skb)->nr_frags;
2116         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2117         if (tso) {
2118                 /* TSO */
2119                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2120                 use_tpd = tpd;
2121
2122                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2123                 buffer_info->length = map_len;
2124                 buffer_info->dma = pci_map_single(adapter->pdev,
2125                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2126                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2127                                                    buffer_info->dma)))
2128                         goto err_dma;
2129                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2130                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2131                         ATL1C_PCIMAP_TODEVICE);
2132                 mapped_len += map_len;
2133                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2134                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2135         }
2136
2137         if (mapped_len < buf_len) {
2138                 /* mapped_len == 0, means we should use the first tpd,
2139                    which is given by caller  */
2140                 if (mapped_len == 0)
2141                         use_tpd = tpd;
2142                 else {
2143                         use_tpd = atl1c_get_tpd(adapter, type);
2144                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2145                 }
2146                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2147                 buffer_info->length = buf_len - mapped_len;
2148                 buffer_info->dma =
2149                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2150                                         buffer_info->length, PCI_DMA_TODEVICE);
2151                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2152                                                    buffer_info->dma)))
2153                         goto err_dma;
2154
2155                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2156                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2157                         ATL1C_PCIMAP_TODEVICE);
2158                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2159                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2160         }
2161
2162         for (f = 0; f < nr_frags; f++) {
2163                 struct skb_frag_struct *frag;
2164
2165                 frag = &skb_shinfo(skb)->frags[f];
2166
2167                 use_tpd = atl1c_get_tpd(adapter, type);
2168                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2169
2170                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2171                 buffer_info->length = skb_frag_size(frag);
2172                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2173                                                     frag, 0,
2174                                                     buffer_info->length,
2175                                                     DMA_TO_DEVICE);
2176                 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2177                         goto err_dma;
2178
2179                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2180                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2181                         ATL1C_PCIMAP_TODEVICE);
2182                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2183                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2184         }
2185
2186         /* The last tpd */
2187         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2188         /* The last buffer info contain the skb address,
2189            so it will be free after unmap */
2190         buffer_info->skb = skb;
2191
2192         return 0;
2193
2194 err_dma:
2195         buffer_info->dma = 0;
2196         buffer_info->length = 0;
2197         return -1;
2198 }
2199
2200 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2201                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2202 {
2203         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2204         u16 reg;
2205
2206         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2207         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2208 }
2209
2210 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2211                                           struct net_device *netdev)
2212 {
2213         struct atl1c_adapter *adapter = netdev_priv(netdev);
2214         unsigned long flags;
2215         u16 tpd_req = 1;
2216         struct atl1c_tpd_desc *tpd;
2217         enum atl1c_trans_queue type = atl1c_trans_normal;
2218
2219         if (test_bit(__AT_DOWN, &adapter->flags)) {
2220                 dev_kfree_skb_any(skb);
2221                 return NETDEV_TX_OK;
2222         }
2223
2224         tpd_req = atl1c_cal_tpd_req(skb);
2225         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2226                 if (netif_msg_pktdata(adapter))
2227                         dev_info(&adapter->pdev->dev, "tx locked\n");
2228                 return NETDEV_TX_LOCKED;
2229         }
2230
2231         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2232                 /* no enough descriptor, just stop queue */
2233                 netif_stop_queue(netdev);
2234                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2235                 return NETDEV_TX_BUSY;
2236         }
2237
2238         tpd = atl1c_get_tpd(adapter, type);
2239
2240         /* do TSO and check sum */
2241         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2242                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2243                 dev_kfree_skb_any(skb);
2244                 return NETDEV_TX_OK;
2245         }
2246
2247         if (unlikely(skb_vlan_tag_present(skb))) {
2248                 u16 vlan = skb_vlan_tag_get(skb);
2249                 __le16 tag;
2250
2251                 vlan = cpu_to_le16(vlan);
2252                 AT_VLAN_TO_TAG(vlan, tag);
2253                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2254                 tpd->vlan_tag = tag;
2255         }
2256
2257         if (skb_network_offset(skb) != ETH_HLEN)
2258                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2259
2260         if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2261                 netif_info(adapter, tx_done, adapter->netdev,
2262                            "tx-skb droppted due to dma error\n");
2263                 /* roll back tpd/buffer */
2264                 atl1c_tx_rollback(adapter, tpd, type);
2265                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2266                 dev_kfree_skb_any(skb);
2267         } else {
2268                 netdev_sent_queue(adapter->netdev, skb->len);
2269                 atl1c_tx_queue(adapter, skb, tpd, type);
2270                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2271         }
2272
2273         return NETDEV_TX_OK;
2274 }
2275
2276 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2277 {
2278         struct net_device *netdev = adapter->netdev;
2279
2280         free_irq(adapter->pdev->irq, netdev);
2281
2282         if (adapter->have_msi)
2283                 pci_disable_msi(adapter->pdev);
2284 }
2285
2286 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2287 {
2288         struct pci_dev    *pdev   = adapter->pdev;
2289         struct net_device *netdev = adapter->netdev;
2290         int flags = 0;
2291         int err = 0;
2292
2293         adapter->have_msi = true;
2294         err = pci_enable_msi(adapter->pdev);
2295         if (err) {
2296                 if (netif_msg_ifup(adapter))
2297                         dev_err(&pdev->dev,
2298                                 "Unable to allocate MSI interrupt Error: %d\n",
2299                                 err);
2300                 adapter->have_msi = false;
2301         }
2302
2303         if (!adapter->have_msi)
2304                 flags |= IRQF_SHARED;
2305         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2306                         netdev->name, netdev);
2307         if (err) {
2308                 if (netif_msg_ifup(adapter))
2309                         dev_err(&pdev->dev,
2310                                 "Unable to allocate interrupt Error: %d\n",
2311                                 err);
2312                 if (adapter->have_msi)
2313                         pci_disable_msi(adapter->pdev);
2314                 return err;
2315         }
2316         if (netif_msg_ifup(adapter))
2317                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2318         return err;
2319 }
2320
2321
2322 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2323 {
2324         /* release tx-pending skbs and reset tx/rx ring index */
2325         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2326         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2327         atl1c_clean_rx_ring(adapter);
2328 }
2329
2330 static int atl1c_up(struct atl1c_adapter *adapter)
2331 {
2332         struct net_device *netdev = adapter->netdev;
2333         int err;
2334
2335         netif_carrier_off(netdev);
2336
2337         err = atl1c_configure(adapter);
2338         if (unlikely(err))
2339                 goto err_up;
2340
2341         err = atl1c_request_irq(adapter);
2342         if (unlikely(err))
2343                 goto err_up;
2344
2345         atl1c_check_link_status(adapter);
2346         clear_bit(__AT_DOWN, &adapter->flags);
2347         napi_enable(&adapter->napi);
2348         atl1c_irq_enable(adapter);
2349         netif_start_queue(netdev);
2350         return err;
2351
2352 err_up:
2353         atl1c_clean_rx_ring(adapter);
2354         return err;
2355 }
2356
2357 static void atl1c_down(struct atl1c_adapter *adapter)
2358 {
2359         struct net_device *netdev = adapter->netdev;
2360
2361         atl1c_del_timer(adapter);
2362         adapter->work_event = 0; /* clear all event */
2363         /* signal that we're down so the interrupt handler does not
2364          * reschedule our watchdog timer */
2365         set_bit(__AT_DOWN, &adapter->flags);
2366         netif_carrier_off(netdev);
2367         napi_disable(&adapter->napi);
2368         atl1c_irq_disable(adapter);
2369         atl1c_free_irq(adapter);
2370         /* disable ASPM if device inactive */
2371         atl1c_disable_l0s_l1(&adapter->hw);
2372         /* reset MAC to disable all RX/TX */
2373         atl1c_reset_mac(&adapter->hw);
2374         msleep(1);
2375
2376         adapter->link_speed = SPEED_0;
2377         adapter->link_duplex = -1;
2378         atl1c_reset_dma_ring(adapter);
2379 }
2380
2381 /**
2382  * atl1c_open - Called when a network interface is made active
2383  * @netdev: network interface device structure
2384  *
2385  * Returns 0 on success, negative value on failure
2386  *
2387  * The open entry point is called when a network interface is made
2388  * active by the system (IFF_UP).  At this point all resources needed
2389  * for transmit and receive operations are allocated, the interrupt
2390  * handler is registered with the OS, the watchdog timer is started,
2391  * and the stack is notified that the interface is ready.
2392  */
2393 static int atl1c_open(struct net_device *netdev)
2394 {
2395         struct atl1c_adapter *adapter = netdev_priv(netdev);
2396         int err;
2397
2398         /* disallow open during test */
2399         if (test_bit(__AT_TESTING, &adapter->flags))
2400                 return -EBUSY;
2401
2402         /* allocate rx/tx dma buffer & descriptors */
2403         err = atl1c_setup_ring_resources(adapter);
2404         if (unlikely(err))
2405                 return err;
2406
2407         err = atl1c_up(adapter);
2408         if (unlikely(err))
2409                 goto err_up;
2410
2411         return 0;
2412
2413 err_up:
2414         atl1c_free_irq(adapter);
2415         atl1c_free_ring_resources(adapter);
2416         atl1c_reset_mac(&adapter->hw);
2417         return err;
2418 }
2419
2420 /**
2421  * atl1c_close - Disables a network interface
2422  * @netdev: network interface device structure
2423  *
2424  * Returns 0, this is not allowed to fail
2425  *
2426  * The close entry point is called when an interface is de-activated
2427  * by the OS.  The hardware is still under the drivers control, but
2428  * needs to be disabled.  A global MAC reset is issued to stop the
2429  * hardware, and all transmit and receive resources are freed.
2430  */
2431 static int atl1c_close(struct net_device *netdev)
2432 {
2433         struct atl1c_adapter *adapter = netdev_priv(netdev);
2434
2435         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2436         set_bit(__AT_DOWN, &adapter->flags);
2437         cancel_work_sync(&adapter->common_task);
2438         atl1c_down(adapter);
2439         atl1c_free_ring_resources(adapter);
2440         return 0;
2441 }
2442
2443 static int atl1c_suspend(struct device *dev)
2444 {
2445         struct pci_dev *pdev = to_pci_dev(dev);
2446         struct net_device *netdev = pci_get_drvdata(pdev);
2447         struct atl1c_adapter *adapter = netdev_priv(netdev);
2448         struct atl1c_hw *hw = &adapter->hw;
2449         u32 wufc = adapter->wol;
2450
2451         atl1c_disable_l0s_l1(hw);
2452         if (netif_running(netdev)) {
2453                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2454                 atl1c_down(adapter);
2455         }
2456         netif_device_detach(netdev);
2457
2458         if (wufc)
2459                 if (atl1c_phy_to_ps_link(hw) != 0)
2460                         dev_dbg(&pdev->dev, "phy power saving failed");
2461
2462         atl1c_power_saving(hw, wufc);
2463
2464         return 0;
2465 }
2466
2467 #ifdef CONFIG_PM_SLEEP
2468 static int atl1c_resume(struct device *dev)
2469 {
2470         struct pci_dev *pdev = to_pci_dev(dev);
2471         struct net_device *netdev = pci_get_drvdata(pdev);
2472         struct atl1c_adapter *adapter = netdev_priv(netdev);
2473
2474         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2475         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2476
2477         atl1c_phy_reset(&adapter->hw);
2478         atl1c_reset_mac(&adapter->hw);
2479         atl1c_phy_init(&adapter->hw);
2480
2481 #if 0
2482         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2483         pm_data &= ~PM_CTRLSTAT_PME_EN;
2484         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2485 #endif
2486
2487         netif_device_attach(netdev);
2488         if (netif_running(netdev))
2489                 atl1c_up(adapter);
2490
2491         return 0;
2492 }
2493 #endif
2494
2495 static void atl1c_shutdown(struct pci_dev *pdev)
2496 {
2497         struct net_device *netdev = pci_get_drvdata(pdev);
2498         struct atl1c_adapter *adapter = netdev_priv(netdev);
2499
2500         atl1c_suspend(&pdev->dev);
2501         pci_wake_from_d3(pdev, adapter->wol);
2502         pci_set_power_state(pdev, PCI_D3hot);
2503 }
2504
2505 static const struct net_device_ops atl1c_netdev_ops = {
2506         .ndo_open               = atl1c_open,
2507         .ndo_stop               = atl1c_close,
2508         .ndo_validate_addr      = eth_validate_addr,
2509         .ndo_start_xmit         = atl1c_xmit_frame,
2510         .ndo_set_mac_address    = atl1c_set_mac_addr,
2511         .ndo_set_rx_mode        = atl1c_set_multi,
2512         .ndo_change_mtu         = atl1c_change_mtu,
2513         .ndo_fix_features       = atl1c_fix_features,
2514         .ndo_set_features       = atl1c_set_features,
2515         .ndo_do_ioctl           = atl1c_ioctl,
2516         .ndo_tx_timeout         = atl1c_tx_timeout,
2517         .ndo_get_stats          = atl1c_get_stats,
2518 #ifdef CONFIG_NET_POLL_CONTROLLER
2519         .ndo_poll_controller    = atl1c_netpoll,
2520 #endif
2521 };
2522
2523 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2524 {
2525         SET_NETDEV_DEV(netdev, &pdev->dev);
2526         pci_set_drvdata(pdev, netdev);
2527
2528         netdev->netdev_ops = &atl1c_netdev_ops;
2529         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2530         atl1c_set_ethtool_ops(netdev);
2531
2532         /* TODO: add when ready */
2533         netdev->hw_features =   NETIF_F_SG              |
2534                                 NETIF_F_HW_CSUM         |
2535                                 NETIF_F_HW_VLAN_CTAG_RX |
2536                                 NETIF_F_TSO             |
2537                                 NETIF_F_TSO6;
2538         netdev->features =      netdev->hw_features     |
2539                                 NETIF_F_HW_VLAN_CTAG_TX;
2540         return 0;
2541 }
2542
2543 /**
2544  * atl1c_probe - Device Initialization Routine
2545  * @pdev: PCI device information struct
2546  * @ent: entry in atl1c_pci_tbl
2547  *
2548  * Returns 0 on success, negative on failure
2549  *
2550  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2551  * The OS initialization, configuring of the adapter private structure,
2552  * and a hardware reset occur.
2553  */
2554 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2555 {
2556         struct net_device *netdev;
2557         struct atl1c_adapter *adapter;
2558         static int cards_found;
2559
2560         int err = 0;
2561
2562         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2563         err = pci_enable_device_mem(pdev);
2564         if (err) {
2565                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2566                 return err;
2567         }
2568
2569         /*
2570          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2571          * shared register for the high 32 bits, so only a single, aligned,
2572          * 4 GB physical address range can be used at a time.
2573          *
2574          * Supporting 64-bit DMA on this hardware is more trouble than it's
2575          * worth.  It is far easier to limit to 32-bit DMA than update
2576          * various kernel subsystems to support the mechanics required by a
2577          * fixed-high-32-bit system.
2578          */
2579         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2580             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2581                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2582                 goto err_dma;
2583         }
2584
2585         err = pci_request_regions(pdev, atl1c_driver_name);
2586         if (err) {
2587                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2588                 goto err_pci_reg;
2589         }
2590
2591         pci_set_master(pdev);
2592
2593         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2594         if (netdev == NULL) {
2595                 err = -ENOMEM;
2596                 goto err_alloc_etherdev;
2597         }
2598
2599         err = atl1c_init_netdev(netdev, pdev);
2600         if (err) {
2601                 dev_err(&pdev->dev, "init netdevice failed\n");
2602                 goto err_init_netdev;
2603         }
2604         adapter = netdev_priv(netdev);
2605         adapter->bd_number = cards_found;
2606         adapter->netdev = netdev;
2607         adapter->pdev = pdev;
2608         adapter->hw.adapter = adapter;
2609         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2610         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2611         if (!adapter->hw.hw_addr) {
2612                 err = -EIO;
2613                 dev_err(&pdev->dev, "cannot map device registers\n");
2614                 goto err_ioremap;
2615         }
2616
2617         /* init mii data */
2618         adapter->mii.dev = netdev;
2619         adapter->mii.mdio_read  = atl1c_mdio_read;
2620         adapter->mii.mdio_write = atl1c_mdio_write;
2621         adapter->mii.phy_id_mask = 0x1f;
2622         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2623         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2624         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2625                         (unsigned long)adapter);
2626         /* setup the private structure */
2627         err = atl1c_sw_init(adapter);
2628         if (err) {
2629                 dev_err(&pdev->dev, "net device private data init failed\n");
2630                 goto err_sw_init;
2631         }
2632         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2633
2634         /* Init GPHY as early as possible due to power saving issue  */
2635         atl1c_phy_reset(&adapter->hw);
2636
2637         err = atl1c_reset_mac(&adapter->hw);
2638         if (err) {
2639                 err = -EIO;
2640                 goto err_reset;
2641         }
2642
2643         /* reset the controller to
2644          * put the device in a known good starting state */
2645         err = atl1c_phy_init(&adapter->hw);
2646         if (err) {
2647                 err = -EIO;
2648                 goto err_reset;
2649         }
2650         if (atl1c_read_mac_addr(&adapter->hw)) {
2651                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2652                 netdev->addr_assign_type = NET_ADDR_RANDOM;
2653         }
2654         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2655         if (netif_msg_probe(adapter))
2656                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2657                         adapter->hw.mac_addr);
2658
2659         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2660         INIT_WORK(&adapter->common_task, atl1c_common_task);
2661         adapter->work_event = 0;
2662         err = register_netdev(netdev);
2663         if (err) {
2664                 dev_err(&pdev->dev, "register netdevice failed\n");
2665                 goto err_register;
2666         }
2667
2668         if (netif_msg_probe(adapter))
2669                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2670         cards_found++;
2671         return 0;
2672
2673 err_reset:
2674 err_register:
2675 err_sw_init:
2676         iounmap(adapter->hw.hw_addr);
2677 err_init_netdev:
2678 err_ioremap:
2679         free_netdev(netdev);
2680 err_alloc_etherdev:
2681         pci_release_regions(pdev);
2682 err_pci_reg:
2683 err_dma:
2684         pci_disable_device(pdev);
2685         return err;
2686 }
2687
2688 /**
2689  * atl1c_remove - Device Removal Routine
2690  * @pdev: PCI device information struct
2691  *
2692  * atl1c_remove is called by the PCI subsystem to alert the driver
2693  * that it should release a PCI device.  The could be caused by a
2694  * Hot-Plug event, or because the driver is going to be removed from
2695  * memory.
2696  */
2697 static void atl1c_remove(struct pci_dev *pdev)
2698 {
2699         struct net_device *netdev = pci_get_drvdata(pdev);
2700         struct atl1c_adapter *adapter = netdev_priv(netdev);
2701
2702         unregister_netdev(netdev);
2703         /* restore permanent address */
2704         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2705         atl1c_phy_disable(&adapter->hw);
2706
2707         iounmap(adapter->hw.hw_addr);
2708
2709         pci_release_regions(pdev);
2710         pci_disable_device(pdev);
2711         free_netdev(netdev);
2712 }
2713
2714 /**
2715  * atl1c_io_error_detected - called when PCI error is detected
2716  * @pdev: Pointer to PCI device
2717  * @state: The current pci connection state
2718  *
2719  * This function is called after a PCI bus error affecting
2720  * this device has been detected.
2721  */
2722 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2723                                                 pci_channel_state_t state)
2724 {
2725         struct net_device *netdev = pci_get_drvdata(pdev);
2726         struct atl1c_adapter *adapter = netdev_priv(netdev);
2727
2728         netif_device_detach(netdev);
2729
2730         if (state == pci_channel_io_perm_failure)
2731                 return PCI_ERS_RESULT_DISCONNECT;
2732
2733         if (netif_running(netdev))
2734                 atl1c_down(adapter);
2735
2736         pci_disable_device(pdev);
2737
2738         /* Request a slot slot reset. */
2739         return PCI_ERS_RESULT_NEED_RESET;
2740 }
2741
2742 /**
2743  * atl1c_io_slot_reset - called after the pci bus has been reset.
2744  * @pdev: Pointer to PCI device
2745  *
2746  * Restart the card from scratch, as if from a cold-boot. Implementation
2747  * resembles the first-half of the e1000_resume routine.
2748  */
2749 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2750 {
2751         struct net_device *netdev = pci_get_drvdata(pdev);
2752         struct atl1c_adapter *adapter = netdev_priv(netdev);
2753
2754         if (pci_enable_device(pdev)) {
2755                 if (netif_msg_hw(adapter))
2756                         dev_err(&pdev->dev,
2757                                 "Cannot re-enable PCI device after reset\n");
2758                 return PCI_ERS_RESULT_DISCONNECT;
2759         }
2760         pci_set_master(pdev);
2761
2762         pci_enable_wake(pdev, PCI_D3hot, 0);
2763         pci_enable_wake(pdev, PCI_D3cold, 0);
2764
2765         atl1c_reset_mac(&adapter->hw);
2766
2767         return PCI_ERS_RESULT_RECOVERED;
2768 }
2769
2770 /**
2771  * atl1c_io_resume - called when traffic can start flowing again.
2772  * @pdev: Pointer to PCI device
2773  *
2774  * This callback is called when the error recovery driver tells us that
2775  * its OK to resume normal operation. Implementation resembles the
2776  * second-half of the atl1c_resume routine.
2777  */
2778 static void atl1c_io_resume(struct pci_dev *pdev)
2779 {
2780         struct net_device *netdev = pci_get_drvdata(pdev);
2781         struct atl1c_adapter *adapter = netdev_priv(netdev);
2782
2783         if (netif_running(netdev)) {
2784                 if (atl1c_up(adapter)) {
2785                         if (netif_msg_hw(adapter))
2786                                 dev_err(&pdev->dev,
2787                                         "Cannot bring device back up after reset\n");
2788                         return;
2789                 }
2790         }
2791
2792         netif_device_attach(netdev);
2793 }
2794
2795 static const struct pci_error_handlers atl1c_err_handler = {
2796         .error_detected = atl1c_io_error_detected,
2797         .slot_reset = atl1c_io_slot_reset,
2798         .resume = atl1c_io_resume,
2799 };
2800
2801 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2802
2803 static struct pci_driver atl1c_driver = {
2804         .name     = atl1c_driver_name,
2805         .id_table = atl1c_pci_tbl,
2806         .probe    = atl1c_probe,
2807         .remove   = atl1c_remove,
2808         .shutdown = atl1c_shutdown,
2809         .err_handler = &atl1c_err_handler,
2810         .driver.pm = &atl1c_pm_ops,
2811 };
2812
2813 module_pci_driver(atl1c_driver);