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

   1 /*
   2  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1c.h"
  23
  24 #define ATL1C_DRV_VERSION "1.0.1.1-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27
  28 /*
  29  * atl1c_pci_tbl - PCI Device ID Table
  30  *
  31  * Wildcard entries (PCI_ANY_ID) should come last
  32  * Last entry must be all 0s
  33  *
  34  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  35  *   Class, Class Mask, private data (not used) }
  36  */
  37 static const struct pci_device_id atl1c_pci_tbl[] = {
  38         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  39         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  40         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  41         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  42         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  43         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  44         /* required last entry */
  45         { 0 }
  46 };
  47 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  48
  49 MODULE_AUTHOR("Jie Yang");
  50 MODULE_AUTHOR("Qualcomm Atheros Inc., <nic-devel@qualcomm.com>");
  51 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
  52 MODULE_LICENSE("GPL");
  53 MODULE_VERSION(ATL1C_DRV_VERSION);
  54
  55 static int atl1c_stop_mac(struct atl1c_hw *hw);
  56 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  57 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
  58 static void atl1c_start_mac(struct atl1c_adapter *adapter);
  59 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
  60                    int *work_done, int work_to_do);
  61 static int atl1c_up(struct atl1c_adapter *adapter);
  62 static void atl1c_down(struct atl1c_adapter *adapter);
  63 static int atl1c_reset_mac(struct atl1c_hw *hw);
  64 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
  65 static int atl1c_configure(struct atl1c_adapter *adapter);
  66 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter);
  67
  68
  69 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  70         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  71 static void atl1c_pcie_patch(struct atl1c_hw *hw)
  72 {
  73         u32 mst_data, data;
  74
  75         /* pclk sel could switch to 25M */
  76         AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
  77         mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
  78         AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
  79
  80         /* WoL/PCIE related settings */
  81         if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
  82                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
  83                 data |= PCIE_PHYMISC_FORCE_RCV_DET;
  84                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
  85         } else { /* new dev set bit5 of MASTER */
  86                 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
  87                         AT_WRITE_REG(hw, REG_MASTER_CTRL,
  88                                 mst_data | MASTER_CTRL_WAKEN_25M);
  89         }
  90         /* aspm/PCIE setting only for l2cb 1.0 */
  91         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
  92                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
  93                 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
  94                         L2CB1_PCIE_PHYMISC2_CDR_BW);
  95                 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
  96                         L2CB1_PCIE_PHYMISC2_L0S_TH);
  97                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
  98                 /* extend L1 sync timer */
  99                 AT_READ_REG(hw, REG_LINK_CTRL, &data);
 100                 data |= LINK_CTRL_EXT_SYNC;
 101                 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
 102         }
 103         /* l2cb 1.x & l1d 1.x */
 104         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
 105                 AT_READ_REG(hw, REG_PM_CTRL, &data);
 106                 data |= PM_CTRL_L0S_BUFSRX_EN;
 107                 AT_WRITE_REG(hw, REG_PM_CTRL, data);
 108                 /* clear vendor msg */
 109                 AT_READ_REG(hw, REG_DMA_DBG, &data);
 110                 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
 111         }
 112 }
 113
 114 /* FIXME: no need any more ? */
 115 /*
 116  * atl1c_init_pcie - init PCIE module
 117  */
 118 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 119 {
 120         u32 data;
 121         u32 pci_cmd;
 122         struct pci_dev *pdev = hw->adapter->pdev;
 123         int pos;
 124
 125         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 126         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 127         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 128                 PCI_COMMAND_IO);
 129         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 130
 131         /*
 132          * Clear any PowerSaveing Settings
 133          */
 134         pci_enable_wake(pdev, PCI_D3hot, 0);
 135         pci_enable_wake(pdev, PCI_D3cold, 0);
 136         /* wol sts read-clear */
 137         AT_READ_REG(hw, REG_WOL_CTRL, &data);
 138         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
 139
 140         /*
 141          * Mask some pcie error bits
 142          */
 143         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 144         if (pos) {
 145                 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
 146                 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
 147                 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
 148         }
 149         /* clear error status */
 150         pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
 151                         PCI_EXP_DEVSTA_NFED |
 152                         PCI_EXP_DEVSTA_FED |
 153                         PCI_EXP_DEVSTA_CED |
 154                         PCI_EXP_DEVSTA_URD);
 155
 156         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 157         data &= ~LTSSM_ID_EN_WRO;
 158         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 159
 160         atl1c_pcie_patch(hw);
 161         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 162                 atl1c_disable_l0s_l1(hw);
 163
 164         msleep(5);
 165 }
 166
 167 /**
 168  * atl1c_irq_enable - Enable default interrupt generation settings
 169  * @adapter: board private structure
 170  */
 171 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 172 {
 173         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 174                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 175                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 176                 AT_WRITE_FLUSH(&adapter->hw);
 177         }
 178 }
 179
 180 /**
 181  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 182  * @adapter: board private structure
 183  */
 184 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 185 {
 186         atomic_inc(&adapter->irq_sem);
 187         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 188         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 189         AT_WRITE_FLUSH(&adapter->hw);
 190         synchronize_irq(adapter->pdev->irq);
 191 }
 192
 193 /**
 194  * atl1c_irq_reset - reset interrupt confiure on the NIC
 195  * @adapter: board private structure
 196  */
 197 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 198 {
 199         atomic_set(&adapter->irq_sem, 1);
 200         atl1c_irq_enable(adapter);
 201 }
 202
 203 /*
 204  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 205  * of the idle status register until the device is actually idle
 206  */
 207 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
 208 {
 209         int timeout;
 210         u32 data;
 211
 212         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 213                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 214                 if ((data & modu_ctrl) == 0)
 215                         return 0;
 216                 msleep(1);
 217         }
 218         return data;
 219 }
 220
 221 /**
 222  * atl1c_phy_config - Timer Call-back
 223  * @data: pointer to netdev cast into an unsigned long
 224  */
 225 static void atl1c_phy_config(unsigned long data)
 226 {
 227         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 228         struct atl1c_hw *hw = &adapter->hw;
 229         unsigned long flags;
 230
 231         spin_lock_irqsave(&adapter->mdio_lock, flags);
 232         atl1c_restart_autoneg(hw);
 233         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 234 }
 235
 236 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 237 {
 238         WARN_ON(in_interrupt());
 239         atl1c_down(adapter);
 240         atl1c_up(adapter);
 241         clear_bit(__AT_RESETTING, &adapter->flags);
 242 }
 243
 244 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 245 {
 246         struct atl1c_hw *hw = &adapter->hw;
 247         struct net_device *netdev = adapter->netdev;
 248         struct pci_dev    *pdev   = adapter->pdev;
 249         int err;
 250         unsigned long flags;
 251         u16 speed, duplex, phy_data;
 252
 253         spin_lock_irqsave(&adapter->mdio_lock, flags);
 254         /* MII_BMSR must read twise */
 255         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 256         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 257         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 258
 259         if ((phy_data & BMSR_LSTATUS) == 0) {
 260                 /* link down */
 261                 netif_carrier_off(netdev);
 262                 hw->hibernate = true;
 263                 if (atl1c_reset_mac(hw) != 0)
 264                         if (netif_msg_hw(adapter))
 265                                 dev_warn(&pdev->dev, "reset mac failed\n");
 266                 atl1c_set_aspm(hw, SPEED_0);
 267                 atl1c_post_phy_linkchg(hw, SPEED_0);
 268                 atl1c_reset_dma_ring(adapter);
 269                 atl1c_configure(adapter);
 270         } else {
 271                 /* Link Up */
 272                 hw->hibernate = false;
 273                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 274                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 275                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 276                 if (unlikely(err))
 277                         return;
 278                 /* link result is our setting */
 279                 if (adapter->link_speed != speed ||
 280                     adapter->link_duplex != duplex) {
 281                         adapter->link_speed  = speed;
 282                         adapter->link_duplex = duplex;
 283                         atl1c_set_aspm(hw, speed);
 284                         atl1c_post_phy_linkchg(hw, speed);
 285                         atl1c_start_mac(adapter);
 286                         if (netif_msg_link(adapter))
 287                                 dev_info(&pdev->dev,
 288                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 289                                         atl1c_driver_name, netdev->name,
 290                                         adapter->link_speed,
 291                                         adapter->link_duplex == FULL_DUPLEX ?
 292                                         "Full Duplex" : "Half Duplex");
 293                 }
 294                 if (!netif_carrier_ok(netdev))
 295                         netif_carrier_on(netdev);
 296         }
 297 }
 298
 299 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 300 {
 301         struct net_device *netdev = adapter->netdev;
 302         struct pci_dev    *pdev   = adapter->pdev;
 303         u16 phy_data;
 304         u16 link_up;
 305
 306         spin_lock(&adapter->mdio_lock);
 307         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 308         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 309         spin_unlock(&adapter->mdio_lock);
 310         link_up = phy_data & BMSR_LSTATUS;
 311         /* notify upper layer link down ASAP */
 312         if (!link_up) {
 313                 if (netif_carrier_ok(netdev)) {
 314                         /* old link state: Up */
 315                         netif_carrier_off(netdev);
 316                         if (netif_msg_link(adapter))
 317                                 dev_info(&pdev->dev,
 318                                         "%s: %s NIC Link is Down\n",
 319                                         atl1c_driver_name, netdev->name);
 320                         adapter->link_speed = SPEED_0;
 321                 }
 322         }
 323
 324         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 325         schedule_work(&adapter->common_task);
 326 }
 327
 328 static void atl1c_common_task(struct work_struct *work)
 329 {
 330         struct atl1c_adapter *adapter;
 331         struct net_device *netdev;
 332
 333         adapter = container_of(work, struct atl1c_adapter, common_task);
 334         netdev = adapter->netdev;
 335
 336         if (test_bit(__AT_DOWN, &adapter->flags))
 337                 return;
 338
 339         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 340                 netif_device_detach(netdev);
 341                 atl1c_down(adapter);
 342                 atl1c_up(adapter);
 343                 netif_device_attach(netdev);
 344         }
 345
 346         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 347                 &adapter->work_event)) {
 348                 atl1c_irq_disable(adapter);
 349                 atl1c_check_link_status(adapter);
 350                 atl1c_irq_enable(adapter);
 351         }
 352 }
 353
 354
 355 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 356 {
 357         del_timer_sync(&adapter->phy_config_timer);
 358 }
 359
 360
 361 /**
 362  * atl1c_tx_timeout - Respond to a Tx Hang
 363  * @netdev: network interface device structure
 364  */
 365 static void atl1c_tx_timeout(struct net_device *netdev)
 366 {
 367         struct atl1c_adapter *adapter = netdev_priv(netdev);
 368
 369         /* Do the reset outside of interrupt context */
 370         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 371         schedule_work(&adapter->common_task);
 372 }
 373
 374 /**
 375  * atl1c_set_multi - Multicast and Promiscuous mode set
 376  * @netdev: network interface device structure
 377  *
 378  * The set_multi entry point is called whenever the multicast address
 379  * list or the network interface flags are updated.  This routine is
 380  * responsible for configuring the hardware for proper multicast,
 381  * promiscuous mode, and all-multi behavior.
 382  */
 383 static void atl1c_set_multi(struct net_device *netdev)
 384 {
 385         struct atl1c_adapter *adapter = netdev_priv(netdev);
 386         struct atl1c_hw *hw = &adapter->hw;
 387         struct netdev_hw_addr *ha;
 388         u32 mac_ctrl_data;
 389         u32 hash_value;
 390
 391         /* Check for Promiscuous and All Multicast modes */
 392         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 393
 394         if (netdev->flags & IFF_PROMISC) {
 395                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 396         } else if (netdev->flags & IFF_ALLMULTI) {
 397                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 398                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 399         } else {
 400                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 401         }
 402
 403         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 404
 405         /* clear the old settings from the multicast hash table */
 406         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 407         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 408
 409         /* comoute mc addresses' hash value ,and put it into hash table */
 410         netdev_for_each_mc_addr(ha, netdev) {
 411                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 412                 atl1c_hash_set(hw, hash_value);
 413         }
 414 }
 415
 416 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 417 {
 418         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 419                 /* enable VLAN tag insert/strip */
 420                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 421         } else {
 422                 /* disable VLAN tag insert/strip */
 423                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 424         }
 425 }
 426
 427 static void atl1c_vlan_mode(struct net_device *netdev,
 428         netdev_features_t features)
 429 {
 430         struct atl1c_adapter *adapter = netdev_priv(netdev);
 431         struct pci_dev *pdev = adapter->pdev;
 432         u32 mac_ctrl_data = 0;
 433
 434         if (netif_msg_pktdata(adapter))
 435                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 436
 437         atl1c_irq_disable(adapter);
 438         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 439         __atl1c_vlan_mode(features, &mac_ctrl_data);
 440         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 441         atl1c_irq_enable(adapter);
 442 }
 443
 444 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 445 {
 446         struct pci_dev *pdev = adapter->pdev;
 447
 448         if (netif_msg_pktdata(adapter))
 449                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 450         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 451 }
 452
 453 /**
 454  * atl1c_set_mac - Change the Ethernet Address of the NIC
 455  * @netdev: network interface device structure
 456  * @p: pointer to an address structure
 457  *
 458  * Returns 0 on success, negative on failure
 459  */
 460 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 461 {
 462         struct atl1c_adapter *adapter = netdev_priv(netdev);
 463         struct sockaddr *addr = p;
 464
 465         if (!is_valid_ether_addr(addr->sa_data))
 466                 return -EADDRNOTAVAIL;
 467
 468         if (netif_running(netdev))
 469                 return -EBUSY;
 470
 471         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 472         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 473
 474         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
 475
 476         return 0;
 477 }
 478
 479 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 480                                 struct net_device *dev)
 481 {
 482         unsigned int head_size;
 483         int mtu = dev->mtu;
 484
 485         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 486                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 487
 488         head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD) +
 489                     SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 490         adapter->rx_frag_size = roundup_pow_of_two(head_size);
 491 }
 492
 493 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 494         netdev_features_t features)
 495 {
 496         /*
 497          * Since there is no support for separate rx/tx vlan accel
 498          * enable/disable make sure tx flag is always in same state as rx.
 499          */
 500         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 501                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 502         else
 503                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 504
 505         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 506                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 507
 508         return features;
 509 }
 510
 511 static int atl1c_set_features(struct net_device *netdev,
 512         netdev_features_t features)
 513 {
 514         netdev_features_t changed = netdev->features ^ features;
 515
 516         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 517                 atl1c_vlan_mode(netdev, features);
 518
 519         return 0;
 520 }
 521
 522 /**
 523  * atl1c_change_mtu - Change the Maximum Transfer Unit
 524  * @netdev: network interface device structure
 525  * @new_mtu: new value for maximum frame size
 526  *
 527  * Returns 0 on success, negative on failure
 528  */
 529 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 530 {
 531         struct atl1c_adapter *adapter = netdev_priv(netdev);
 532         struct atl1c_hw *hw = &adapter->hw;
 533         int old_mtu   = netdev->mtu;
 534         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 535
 536         /* Fast Ethernet controller doesn't support jumbo packet */
 537         if (((hw->nic_type == athr_l2c ||
 538               hw->nic_type == athr_l2c_b ||
 539               hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
 540               max_frame < ETH_ZLEN + ETH_FCS_LEN ||
 541               max_frame > MAX_JUMBO_FRAME_SIZE) {
 542                 if (netif_msg_link(adapter))
 543                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 544                 return -EINVAL;
 545         }
 546         /* set MTU */
 547         if (old_mtu != new_mtu && netif_running(netdev)) {
 548                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 549                         msleep(1);
 550                 netdev->mtu = new_mtu;
 551                 adapter->hw.max_frame_size = new_mtu;
 552                 atl1c_set_rxbufsize(adapter, netdev);
 553                 atl1c_down(adapter);
 554                 netdev_update_features(netdev);
 555                 atl1c_up(adapter);
 556                 clear_bit(__AT_RESETTING, &adapter->flags);
 557         }
 558         return 0;
 559 }
 560
 561 /*
 562  *  caller should hold mdio_lock
 563  */
 564 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 565 {
 566         struct atl1c_adapter *adapter = netdev_priv(netdev);
 567         u16 result;
 568
 569         atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
 570         return result;
 571 }
 572
 573 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 574                              int reg_num, int val)
 575 {
 576         struct atl1c_adapter *adapter = netdev_priv(netdev);
 577
 578         atl1c_write_phy_reg(&adapter->hw, reg_num, val);
 579 }
 580
 581 static int atl1c_mii_ioctl(struct net_device *netdev,
 582                            struct ifreq *ifr, int cmd)
 583 {
 584         struct atl1c_adapter *adapter = netdev_priv(netdev);
 585         struct pci_dev *pdev = adapter->pdev;
 586         struct mii_ioctl_data *data = if_mii(ifr);
 587         unsigned long flags;
 588         int retval = 0;
 589
 590         if (!netif_running(netdev))
 591                 return -EINVAL;
 592
 593         spin_lock_irqsave(&adapter->mdio_lock, flags);
 594         switch (cmd) {
 595         case SIOCGMIIPHY:
 596                 data->phy_id = 0;
 597                 break;
 598
 599         case SIOCGMIIREG:
 600                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 601                                     &data->val_out)) {
 602                         retval = -EIO;
 603                         goto out;
 604                 }
 605                 break;
 606
 607         case SIOCSMIIREG:
 608                 if (data->reg_num & ~(0x1F)) {
 609                         retval = -EFAULT;
 610                         goto out;
 611                 }
 612
 613                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 614                                 data->reg_num, data->val_in);
 615                 if (atl1c_write_phy_reg(&adapter->hw,
 616                                      data->reg_num, data->val_in)) {
 617                         retval = -EIO;
 618                         goto out;
 619                 }
 620                 break;
 621
 622         default:
 623                 retval = -EOPNOTSUPP;
 624                 break;
 625         }
 626 out:
 627         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 628         return retval;
 629 }
 630
 631 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 632 {
 633         switch (cmd) {
 634         case SIOCGMIIPHY:
 635         case SIOCGMIIREG:
 636         case SIOCSMIIREG:
 637                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 638         default:
 639                 return -EOPNOTSUPP;
 640         }
 641 }
 642
 643 /**
 644  * atl1c_alloc_queues - Allocate memory for all rings
 645  * @adapter: board private structure to initialize
 646  *
 647  */
 648 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
 649 {
 650         return 0;
 651 }
 652
 653 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 654 {
 655         switch (hw->device_id) {
 656         case PCI_DEVICE_ID_ATTANSIC_L2C:
 657                 hw->nic_type = athr_l2c;
 658                 break;
 659         case PCI_DEVICE_ID_ATTANSIC_L1C:
 660                 hw->nic_type = athr_l1c;
 661                 break;
 662         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 663                 hw->nic_type = athr_l2c_b;
 664                 break;
 665         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 666                 hw->nic_type = athr_l2c_b2;
 667                 break;
 668         case PCI_DEVICE_ID_ATHEROS_L1D:
 669                 hw->nic_type = athr_l1d;
 670                 break;
 671         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 672                 hw->nic_type = athr_l1d_2;
 673                 break;
 674         default:
 675                 break;
 676         }
 677 }
 678
 679 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 680 {
 681         u32 link_ctrl_data;
 682
 683         atl1c_set_mac_type(hw);
 684         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 685
 686         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 687                          ATL1C_TXQ_MODE_ENHANCE;
 688         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 689                           ATL1C_ASPM_L1_SUPPORT;
 690         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 691
 692         if (hw->nic_type == athr_l1c ||
 693             hw->nic_type == athr_l1d ||
 694             hw->nic_type == athr_l1d_2)
 695                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 696         return 0;
 697 }
 698
 699 struct atl1c_platform_patch {
 700         u16 pci_did;
 701         u8  pci_revid;
 702         u16 subsystem_vid;
 703         u16 subsystem_did;
 704         u32 patch_flag;
 705 #define ATL1C_LINK_PATCH        0x1
 706 };
 707 static const struct atl1c_platform_patch plats[] = {
 708 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
 709 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
 710 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
 711 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
 712 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
 713 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
 714 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
 715 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
 716 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
 717 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
 718 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
 719 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
 720 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
 721 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
 722 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
 723 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
 724 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
 725 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
 726 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
 727 {0},
 728 };
 729
 730 static void atl1c_patch_assign(struct atl1c_hw *hw)
 731 {
 732         struct pci_dev  *pdev = hw->adapter->pdev;
 733         u32 misc_ctrl;
 734         int i = 0;
 735
 736         hw->msi_lnkpatch = false;
 737
 738         while (plats[i].pci_did != 0) {
 739                 if (plats[i].pci_did == hw->device_id &&
 740                     plats[i].pci_revid == hw->revision_id &&
 741                     plats[i].subsystem_vid == hw->subsystem_vendor_id &&
 742                     plats[i].subsystem_did == hw->subsystem_id) {
 743                         if (plats[i].patch_flag & ATL1C_LINK_PATCH)
 744                                 hw->msi_lnkpatch = true;
 745                 }
 746                 i++;
 747         }
 748
 749         if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
 750             hw->revision_id == L2CB_V21) {
 751                 /* config access mode */
 752                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 753                                        REG_PCIE_DEV_MISC_CTRL);
 754                 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
 755                 misc_ctrl &= ~0x100;
 756                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 757                                        REG_PCIE_DEV_MISC_CTRL);
 758                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
 759         }
 760 }
 761 /**
 762  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 763  * @adapter: board private structure to initialize
 764  *
 765  * atl1c_sw_init initializes the Adapter private data structure.
 766  * Fields are initialized based on PCI device information and
 767  * OS network device settings (MTU size).
 768  */
 769 static int atl1c_sw_init(struct atl1c_adapter *adapter)
 770 {
 771         struct atl1c_hw *hw   = &adapter->hw;
 772         struct pci_dev  *pdev = adapter->pdev;
 773         u32 revision;
 774
 775
 776         adapter->wol = 0;
 777         device_set_wakeup_enable(&pdev->dev, false);
 778         adapter->link_speed = SPEED_0;
 779         adapter->link_duplex = FULL_DUPLEX;
 780         adapter->tpd_ring[0].count = 1024;
 781         adapter->rfd_ring.count = 512;
 782
 783         hw->vendor_id = pdev->vendor;
 784         hw->device_id = pdev->device;
 785         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 786         hw->subsystem_id = pdev->subsystem_device;
 787         pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
 788         hw->revision_id = revision & 0xFF;
 789         /* before link up, we assume hibernate is true */
 790         hw->hibernate = true;
 791         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 792         if (atl1c_setup_mac_funcs(hw) != 0) {
 793                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 794                 return -1;
 795         }
 796         atl1c_patch_assign(hw);
 797
 798         hw->intr_mask = IMR_NORMAL_MASK;
 799         hw->phy_configured = false;
 800         hw->preamble_len = 7;
 801         hw->max_frame_size = adapter->netdev->mtu;
 802         hw->autoneg_advertised = ADVERTISED_Autoneg;
 803         hw->indirect_tab = 0xE4E4E4E4;
 804         hw->base_cpu = 0;
 805
 806         hw->ict = 50000;                /* 100ms */
 807         hw->smb_timer = 200000;         /* 400ms */
 808         hw->rx_imt = 200;
 809         hw->tx_imt = 1000;
 810
 811         hw->tpd_burst = 5;
 812         hw->rfd_burst = 8;
 813         hw->dma_order = atl1c_dma_ord_out;
 814         hw->dmar_block = atl1c_dma_req_1024;
 815
 816         if (atl1c_alloc_queues(adapter)) {
 817                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 818                 return -ENOMEM;
 819         }
 820         /* TODO */
 821         atl1c_set_rxbufsize(adapter, adapter->netdev);
 822         atomic_set(&adapter->irq_sem, 1);
 823         spin_lock_init(&adapter->mdio_lock);
 824         set_bit(__AT_DOWN, &adapter->flags);
 825
 826         return 0;
 827 }
 828
 829 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 830                                 struct atl1c_buffer *buffer_info)
 831 {
 832         u16 pci_driection;
 833         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 834                 return;
 835         if (buffer_info->dma) {
 836                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 837                         pci_driection = PCI_DMA_FROMDEVICE;
 838                 else
 839                         pci_driection = PCI_DMA_TODEVICE;
 840
 841                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 842                         pci_unmap_single(pdev, buffer_info->dma,
 843                                         buffer_info->length, pci_driection);
 844                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 845                         pci_unmap_page(pdev, buffer_info->dma,
 846                                         buffer_info->length, pci_driection);
 847         }
 848         if (buffer_info->skb)
 849                 dev_consume_skb_any(buffer_info->skb);
 850         buffer_info->dma = 0;
 851         buffer_info->skb = NULL;
 852         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 853 }
 854 /**
 855  * atl1c_clean_tx_ring - Free Tx-skb
 856  * @adapter: board private structure
 857  */
 858 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 859                                 enum atl1c_trans_queue type)
 860 {
 861         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 862         struct atl1c_buffer *buffer_info;
 863         struct pci_dev *pdev = adapter->pdev;
 864         u16 index, ring_count;
 865
 866         ring_count = tpd_ring->count;
 867         for (index = 0; index < ring_count; index++) {
 868                 buffer_info = &tpd_ring->buffer_info[index];
 869                 atl1c_clean_buffer(pdev, buffer_info);
 870         }
 871
 872         netdev_reset_queue(adapter->netdev);
 873
 874         /* Zero out Tx-buffers */
 875         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 876                 ring_count);
 877         atomic_set(&tpd_ring->next_to_clean, 0);
 878         tpd_ring->next_to_use = 0;
 879 }
 880
 881 /**
 882  * atl1c_clean_rx_ring - Free rx-reservation skbs
 883  * @adapter: board private structure
 884  */
 885 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 886 {
 887         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 888         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 889         struct atl1c_buffer *buffer_info;
 890         struct pci_dev *pdev = adapter->pdev;
 891         int j;
 892
 893         for (j = 0; j < rfd_ring->count; j++) {
 894                 buffer_info = &rfd_ring->buffer_info[j];
 895                 atl1c_clean_buffer(pdev, buffer_info);
 896         }
 897         /* zero out the descriptor ring */
 898         memset(rfd_ring->desc, 0, rfd_ring->size);
 899         rfd_ring->next_to_clean = 0;
 900         rfd_ring->next_to_use = 0;
 901         rrd_ring->next_to_use = 0;
 902         rrd_ring->next_to_clean = 0;
 903 }
 904
 905 /*
 906  * Read / Write Ptr Initialize:
 907  */
 908 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 909 {
 910         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 911         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 912         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 913         struct atl1c_buffer *buffer_info;
 914         int i, j;
 915
 916         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 917                 tpd_ring[i].next_to_use = 0;
 918                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 919                 buffer_info = tpd_ring[i].buffer_info;
 920                 for (j = 0; j < tpd_ring->count; j++)
 921                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 922                                         ATL1C_BUFFER_FREE);
 923         }
 924         rfd_ring->next_to_use = 0;
 925         rfd_ring->next_to_clean = 0;
 926         rrd_ring->next_to_use = 0;
 927         rrd_ring->next_to_clean = 0;
 928         for (j = 0; j < rfd_ring->count; j++) {
 929                 buffer_info = &rfd_ring->buffer_info[j];
 930                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 931         }
 932 }
 933
 934 /**
 935  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 936  * @adapter: board private structure
 937  *
 938  * Free all transmit software resources
 939  */
 940 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 941 {
 942         struct pci_dev *pdev = adapter->pdev;
 943
 944         pci_free_consistent(pdev, adapter->ring_header.size,
 945                                         adapter->ring_header.desc,
 946                                         adapter->ring_header.dma);
 947         adapter->ring_header.desc = NULL;
 948
 949         /* Note: just free tdp_ring.buffer_info,
 950         *  it contain rfd_ring.buffer_info, do not double free */
 951         if (adapter->tpd_ring[0].buffer_info) {
 952                 kfree(adapter->tpd_ring[0].buffer_info);
 953                 adapter->tpd_ring[0].buffer_info = NULL;
 954         }
 955         if (adapter->rx_page) {
 956                 put_page(adapter->rx_page);
 957                 adapter->rx_page = NULL;
 958         }
 959 }
 960
 961 /**
 962  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 963  * @adapter: board private structure
 964  *
 965  * Return 0 on success, negative on failure
 966  */
 967 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 968 {
 969         struct pci_dev *pdev = adapter->pdev;
 970         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 971         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
 972         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
 973         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 974         int size;
 975         int i;
 976         int count = 0;
 977         int rx_desc_count = 0;
 978         u32 offset = 0;
 979
 980         rrd_ring->count = rfd_ring->count;
 981         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 982                 tpd_ring[i].count = tpd_ring[0].count;
 983
 984         /* 2 tpd queue, one high priority queue,
 985          * another normal priority queue */
 986         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 987                 rfd_ring->count);
 988         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 989         if (unlikely(!tpd_ring->buffer_info))
 990                 goto err_nomem;
 991
 992         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 993                 tpd_ring[i].buffer_info =
 994                         (tpd_ring->buffer_info + count);
 995                 count += tpd_ring[i].count;
 996         }
 997
 998         rfd_ring->buffer_info =
 999                 (tpd_ring->buffer_info + count);
1000         count += rfd_ring->count;
1001         rx_desc_count += rfd_ring->count;
1002
1003         /*
1004          * real ring DMA buffer
1005          * each ring/block may need up to 8 bytes for alignment, hence the
1006          * additional bytes tacked onto the end.
1007          */
1008         ring_header->size = size =
1009                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
1010                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
1011                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
1012                 8 * 4;
1013
1014         ring_header->desc = dma_zalloc_coherent(&pdev->dev, ring_header->size,
1015                                                 &ring_header->dma, GFP_KERNEL);
1016         if (unlikely(!ring_header->desc)) {
1017                 dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
1018                 goto err_nomem;
1019         }
1020         /* init TPD ring */
1021
1022         tpd_ring[0].dma = roundup(ring_header->dma, 8);
1023         offset = tpd_ring[0].dma - ring_header->dma;
1024         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1025                 tpd_ring[i].dma = ring_header->dma + offset;
1026                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1027                 tpd_ring[i].size =
1028                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1029                 offset += roundup(tpd_ring[i].size, 8);
1030         }
1031         /* init RFD ring */
1032         rfd_ring->dma = ring_header->dma + offset;
1033         rfd_ring->desc = (u8 *) ring_header->desc + offset;
1034         rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count;
1035         offset += roundup(rfd_ring->size, 8);
1036
1037         /* init RRD ring */
1038         rrd_ring->dma = ring_header->dma + offset;
1039         rrd_ring->desc = (u8 *) ring_header->desc + offset;
1040         rrd_ring->size = sizeof(struct atl1c_recv_ret_status) *
1041                 rrd_ring->count;
1042         offset += roundup(rrd_ring->size, 8);
1043
1044         return 0;
1045
1046 err_nomem:
1047         kfree(tpd_ring->buffer_info);
1048         return -ENOMEM;
1049 }
1050
1051 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1052 {
1053         struct atl1c_hw *hw = &adapter->hw;
1054         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1055         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1056         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1057                                 adapter->tpd_ring;
1058
1059         /* TPD */
1060         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1061                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1062                                 AT_DMA_HI_ADDR_MASK) >> 32));
1063         /* just enable normal priority TX queue */
1064         AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
1065                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1066                                 AT_DMA_LO_ADDR_MASK));
1067         AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
1068                         (u32)(tpd_ring[atl1c_trans_high].dma &
1069                                 AT_DMA_LO_ADDR_MASK));
1070         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1071                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1072
1073
1074         /* RFD */
1075         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1076                         (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1077         AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO,
1078                         (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK));
1079
1080         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1081                         rfd_ring->count & RFD_RING_SIZE_MASK);
1082         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1083                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1084
1085         /* RRD */
1086         AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO,
1087                         (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK));
1088         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1089                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1090
1091         if (hw->nic_type == athr_l2c_b) {
1092                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1093                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1094                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1095                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1096                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1097                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1098                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1099                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1100         }
1101         /* Load all of base address above */
1102         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1103 }
1104
1105 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1106 {
1107         struct atl1c_hw *hw = &adapter->hw;
1108         int max_pay_load;
1109         u16 tx_offload_thresh;
1110         u32 txq_ctrl_data;
1111
1112         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1113         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1114                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1115         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1116         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1117         /*
1118          * if BIOS had changed the dam-read-max-length to an invalid value,
1119          * restore it to default value
1120          */
1121         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1122                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1123                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1124         }
1125         txq_ctrl_data =
1126                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1127                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1128
1129         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1130 }
1131
1132 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1133 {
1134         struct atl1c_hw *hw = &adapter->hw;
1135         u32 rxq_ctrl_data;
1136
1137         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1138                         RXQ_RFD_BURST_NUM_SHIFT;
1139
1140         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1141                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1142
1143         /* aspm for gigabit */
1144         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1145                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1146                         ASPM_THRUPUT_LIMIT_100M);
1147
1148         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1149 }
1150
1151 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1152 {
1153         struct atl1c_hw *hw = &adapter->hw;
1154         u32 dma_ctrl_data;
1155
1156         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1157                 DMA_CTRL_RREQ_PRI_DATA |
1158                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1159                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1160                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1161
1162         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1163 }
1164
1165 /*
1166  * Stop the mac, transmit and receive units
1167  * hw - Struct containing variables accessed by shared code
1168  * return : 0  or  idle status (if error)
1169  */
1170 static int atl1c_stop_mac(struct atl1c_hw *hw)
1171 {
1172         u32 data;
1173
1174         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1175         data &= ~RXQ_CTRL_EN;
1176         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1177
1178         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1179         data &= ~TXQ_CTRL_EN;
1180         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1181
1182         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1183
1184         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1185         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1186         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1187
1188         return (int)atl1c_wait_until_idle(hw,
1189                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1190 }
1191
1192 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1193 {
1194         struct atl1c_hw *hw = &adapter->hw;
1195         u32 mac, txq, rxq;
1196
1197         hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX ? true : false;
1198         hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1199                 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1200
1201         AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1202         AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1203         AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1204
1205         txq |= TXQ_CTRL_EN;
1206         rxq |= RXQ_CTRL_EN;
1207         mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1208                MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1209                MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1210                MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1211                MAC_CTRL_HASH_ALG_CRC32;
1212         if (hw->mac_duplex)
1213                 mac |= MAC_CTRL_DUPLX;
1214         else
1215                 mac &= ~MAC_CTRL_DUPLX;
1216         mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1217         mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1218
1219         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1220         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1221         AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1222 }
1223
1224 /*
1225  * Reset the transmit and receive units; mask and clear all interrupts.
1226  * hw - Struct containing variables accessed by shared code
1227  * return : 0  or  idle status (if error)
1228  */
1229 static int atl1c_reset_mac(struct atl1c_hw *hw)
1230 {
1231         struct atl1c_adapter *adapter = hw->adapter;
1232         struct pci_dev *pdev = adapter->pdev;
1233         u32 ctrl_data = 0;
1234
1235         atl1c_stop_mac(hw);
1236         /*
1237          * Issue Soft Reset to the MAC.  This will reset the chip's
1238          * transmit, receive, DMA.  It will not effect
1239          * the current PCI configuration.  The global reset bit is self-
1240          * clearing, and should clear within a microsecond.
1241          */
1242         AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1243         ctrl_data |= MASTER_CTRL_OOB_DIS;
1244         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1245
1246         AT_WRITE_FLUSH(hw);
1247         msleep(10);
1248         /* Wait at least 10ms for All module to be Idle */
1249
1250         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1251                 dev_err(&pdev->dev,
1252                         "MAC state machine can't be idle since"
1253                         " disabled for 10ms second\n");
1254                 return -1;
1255         }
1256         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1257
1258         /* driver control speed/duplex */
1259         AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1260         AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1261
1262         /* clk switch setting */
1263         AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1264         switch (hw->nic_type) {
1265         case athr_l2c_b:
1266                 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1267                                 SERDES_MAC_CLK_SLOWDOWN);
1268                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1269                 break;
1270         case athr_l2c_b2:
1271         case athr_l1d_2:
1272                 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1273                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1274                 break;
1275         default:
1276                 break;
1277         }
1278
1279         return 0;
1280 }
1281
1282 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1283 {
1284         u16 ctrl_flags = hw->ctrl_flags;
1285
1286         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1287         atl1c_set_aspm(hw, SPEED_0);
1288         hw->ctrl_flags = ctrl_flags;
1289 }
1290
1291 /*
1292  * Set ASPM state.
1293  * Enable/disable L0s/L1 depend on link state.
1294  */
1295 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1296 {
1297         u32 pm_ctrl_data;
1298         u32 link_l1_timer;
1299
1300         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1301         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1302                           PM_CTRL_ASPM_L0S_EN |
1303                           PM_CTRL_MAC_ASPM_CHK);
1304         /* L1 timer */
1305         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1306                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1307                 link_l1_timer =
1308                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1309                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1310                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1311                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1312         } else {
1313                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1314                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1315                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1316                         link_l1_timer = 1;
1317                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1318                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1319         }
1320
1321         /* L0S/L1 enable */
1322         if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1323                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1324         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1325                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1326
1327         /* l2cb & l1d & l2cb2 & l1d2 */
1328         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1329             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1330                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1331                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1332                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1333                                 PM_CTRL_SERDES_PD_EX_L1 |
1334                                 PM_CTRL_CLK_SWH_L1;
1335                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1336                                   PM_CTRL_SERDES_PLL_L1_EN |
1337                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1338                                   PM_CTRL_SA_DLY_EN |
1339                                   PM_CTRL_HOTRST);
1340                 /* disable l0s if link down or l2cb */
1341                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1342                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1343         } else { /* l1c */
1344                 pm_ctrl_data =
1345                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1346                 if (link_speed != SPEED_0) {
1347                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1348                                         PM_CTRL_SERDES_PLL_L1_EN |
1349                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1350                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1351                                           PM_CTRL_CLK_SWH_L1 |
1352                                           PM_CTRL_ASPM_L0S_EN |
1353                                           PM_CTRL_ASPM_L1_EN);
1354                 } else { /* link down */
1355                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1356                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1357                                           PM_CTRL_SERDES_PLL_L1_EN |
1358                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1359                                           PM_CTRL_ASPM_L0S_EN);
1360                 }
1361         }
1362         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1363
1364         return;
1365 }
1366
1367 /**
1368  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1369  * @adapter: board private structure
1370  *
1371  * Configure the Tx /Rx unit of the MAC after a reset.
1372  */
1373 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1374 {
1375         struct atl1c_hw *hw = &adapter->hw;
1376         u32 master_ctrl_data = 0;
1377         u32 intr_modrt_data;
1378         u32 data;
1379
1380         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1381         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1382                               MASTER_CTRL_RX_ITIMER_EN |
1383                               MASTER_CTRL_INT_RDCLR);
1384         /* clear interrupt status */
1385         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1386         /*  Clear any WOL status */
1387         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1388         /* set Interrupt Clear Timer
1389          * HW will enable self to assert interrupt event to system after
1390          * waiting x-time for software to notify it accept interrupt.
1391          */
1392
1393         data = CLK_GATING_EN_ALL;
1394         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1395                 if (hw->nic_type == athr_l2c_b)
1396                         data &= ~CLK_GATING_RXMAC_EN;
1397         } else
1398                 data = 0;
1399         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1400
1401         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1402                 hw->ict & INT_RETRIG_TIMER_MASK);
1403
1404         atl1c_configure_des_ring(adapter);
1405
1406         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1407                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1408                                         IRQ_MODRT_TX_TIMER_SHIFT;
1409                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1410                                         IRQ_MODRT_RX_TIMER_SHIFT;
1411                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1412                 master_ctrl_data |=
1413                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1414         }
1415
1416         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1417                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1418
1419         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1420         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1421
1422         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1423                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1424
1425         /* set MTU */
1426         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1427                         VLAN_HLEN + ETH_FCS_LEN);
1428
1429         atl1c_configure_tx(adapter);
1430         atl1c_configure_rx(adapter);
1431         atl1c_configure_dma(adapter);
1432
1433         return 0;
1434 }
1435
1436 static int atl1c_configure(struct atl1c_adapter *adapter)
1437 {
1438         struct net_device *netdev = adapter->netdev;
1439         int num;
1440
1441         atl1c_init_ring_ptrs(adapter);
1442         atl1c_set_multi(netdev);
1443         atl1c_restore_vlan(adapter);
1444
1445         num = atl1c_alloc_rx_buffer(adapter);
1446         if (unlikely(num == 0))
1447                 return -ENOMEM;
1448
1449         if (atl1c_configure_mac(adapter))
1450                 return -EIO;
1451
1452         return 0;
1453 }
1454
1455 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1456 {
1457         u16 hw_reg_addr = 0;
1458         unsigned long *stats_item = NULL;
1459         u32 data;
1460
1461         /* update rx status */
1462         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1463         stats_item  = &adapter->hw_stats.rx_ok;
1464         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1465                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1466                 *stats_item += data;
1467                 stats_item++;
1468                 hw_reg_addr += 4;
1469         }
1470 /* update tx status */
1471         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1472         stats_item  = &adapter->hw_stats.tx_ok;
1473         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1474                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1475                 *stats_item += data;
1476                 stats_item++;
1477                 hw_reg_addr += 4;
1478         }
1479 }
1480
1481 /**
1482  * atl1c_get_stats - Get System Network Statistics
1483  * @netdev: network interface device structure
1484  *
1485  * Returns the address of the device statistics structure.
1486  * The statistics are actually updated from the timer callback.
1487  */
1488 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1489 {
1490         struct atl1c_adapter *adapter = netdev_priv(netdev);
1491         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1492         struct net_device_stats *net_stats = &netdev->stats;
1493
1494         atl1c_update_hw_stats(adapter);
1495         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1496         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1497         net_stats->multicast  = hw_stats->rx_mcast;
1498         net_stats->collisions = hw_stats->tx_1_col +
1499                                 hw_stats->tx_2_col +
1500                                 hw_stats->tx_late_col +
1501                                 hw_stats->tx_abort_col;
1502
1503         net_stats->rx_errors  = hw_stats->rx_frag +
1504                                 hw_stats->rx_fcs_err +
1505                                 hw_stats->rx_len_err +
1506                                 hw_stats->rx_sz_ov +
1507                                 hw_stats->rx_rrd_ov +
1508                                 hw_stats->rx_align_err +
1509                                 hw_stats->rx_rxf_ov;
1510
1511         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1512         net_stats->rx_length_errors = hw_stats->rx_len_err;
1513         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1514         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1515         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1516
1517         net_stats->tx_errors = hw_stats->tx_late_col +
1518                                hw_stats->tx_abort_col +
1519                                hw_stats->tx_underrun +
1520                                hw_stats->tx_trunc;
1521
1522         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1523         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1524         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1525
1526         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1527         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1528
1529         return net_stats;
1530 }
1531
1532 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1533 {
1534         u16 phy_data;
1535
1536         spin_lock(&adapter->mdio_lock);
1537         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1538         spin_unlock(&adapter->mdio_lock);
1539 }
1540
1541 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1542                                 enum atl1c_trans_queue type)
1543 {
1544         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1545         struct atl1c_buffer *buffer_info;
1546         struct pci_dev *pdev = adapter->pdev;
1547         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1548         u16 hw_next_to_clean;
1549         u16 reg;
1550         unsigned int total_bytes = 0, total_packets = 0;
1551
1552         reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;
1553
1554         AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);
1555
1556         while (next_to_clean != hw_next_to_clean) {
1557                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1558                 if (buffer_info->skb) {
1559                         total_bytes += buffer_info->skb->len;
1560                         total_packets++;
1561                 }
1562                 atl1c_clean_buffer(pdev, buffer_info);
1563                 if (++next_to_clean == tpd_ring->count)
1564                         next_to_clean = 0;
1565                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1566         }
1567
1568         netdev_completed_queue(adapter->netdev, total_packets, total_bytes);
1569
1570         if (netif_queue_stopped(adapter->netdev) &&
1571                         netif_carrier_ok(adapter->netdev)) {
1572                 netif_wake_queue(adapter->netdev);
1573         }
1574
1575         return true;
1576 }
1577
1578 /**
1579  * atl1c_intr - Interrupt Handler
1580  * @irq: interrupt number
1581  * @data: pointer to a network interface device structure
1582  */
1583 static irqreturn_t atl1c_intr(int irq, void *data)
1584 {
1585         struct net_device *netdev  = data;
1586         struct atl1c_adapter *adapter = netdev_priv(netdev);
1587         struct pci_dev *pdev = adapter->pdev;
1588         struct atl1c_hw *hw = &adapter->hw;
1589         int max_ints = AT_MAX_INT_WORK;
1590         int handled = IRQ_NONE;
1591         u32 status;
1592         u32 reg_data;
1593
1594         do {
1595                 AT_READ_REG(hw, REG_ISR, &reg_data);
1596                 status = reg_data & hw->intr_mask;
1597
1598                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1599                         if (max_ints != AT_MAX_INT_WORK)
1600                                 handled = IRQ_HANDLED;
1601                         break;
1602                 }
1603                 /* link event */
1604                 if (status & ISR_GPHY)
1605                         atl1c_clear_phy_int(adapter);
1606                 /* Ack ISR */
1607                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1608                 if (status & ISR_RX_PKT) {
1609                         if (likely(napi_schedule_prep(&adapter->napi))) {
1610                                 hw->intr_mask &= ~ISR_RX_PKT;
1611                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1612                                 __napi_schedule(&adapter->napi);
1613                         }
1614                 }
1615                 if (status & ISR_TX_PKT)
1616                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1617
1618                 handled = IRQ_HANDLED;
1619                 /* check if PCIE PHY Link down */
1620                 if (status & ISR_ERROR) {
1621                         if (netif_msg_hw(adapter))
1622                                 dev_err(&pdev->dev,
1623                                         "atl1c hardware error (status = 0x%x)\n",
1624                                         status & ISR_ERROR);
1625                         /* reset MAC */
1626                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1627                         schedule_work(&adapter->common_task);
1628                         return IRQ_HANDLED;
1629                 }
1630
1631                 if (status & ISR_OVER)
1632                         if (netif_msg_intr(adapter))
1633                                 dev_warn(&pdev->dev,
1634                                         "TX/RX overflow (status = 0x%x)\n",
1635                                         status & ISR_OVER);
1636
1637                 /* link event */
1638                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1639                         netdev->stats.tx_carrier_errors++;
1640                         atl1c_link_chg_event(adapter);
1641                         break;
1642                 }
1643
1644         } while (--max_ints > 0);
1645         /* re-enable Interrupt*/
1646         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1647         return handled;
1648 }
1649
1650 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1651                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1652 {
1653         /*
1654          * The pid field in RRS in not correct sometimes, so we
1655          * cannot figure out if the packet is fragmented or not,
1656          * so we tell the KERNEL CHECKSUM_NONE
1657          */
1658         skb_checksum_none_assert(skb);
1659 }
1660
1661 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter)
1662 {
1663         struct sk_buff *skb;
1664         struct page *page;
1665
1666         if (adapter->rx_frag_size > PAGE_SIZE)
1667                 return netdev_alloc_skb(adapter->netdev,
1668                                         adapter->rx_buffer_len);
1669
1670         page = adapter->rx_page;
1671         if (!page) {
1672                 adapter->rx_page = page = alloc_page(GFP_ATOMIC);
1673                 if (unlikely(!page))
1674                         return NULL;
1675                 adapter->rx_page_offset = 0;
1676         }
1677
1678         skb = build_skb(page_address(page) + adapter->rx_page_offset,
1679                         adapter->rx_frag_size);
1680         if (likely(skb)) {
1681                 skb_reserve(skb, NET_SKB_PAD);
1682                 adapter->rx_page_offset += adapter->rx_frag_size;
1683                 if (adapter->rx_page_offset >= PAGE_SIZE)
1684                         adapter->rx_page = NULL;
1685                 else
1686                         get_page(page);
1687         }
1688         return skb;
1689 }
1690
1691 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter)
1692 {
1693         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1694         struct pci_dev *pdev = adapter->pdev;
1695         struct atl1c_buffer *buffer_info, *next_info;
1696         struct sk_buff *skb;
1697         void *vir_addr = NULL;
1698         u16 num_alloc = 0;
1699         u16 rfd_next_to_use, next_next;
1700         struct atl1c_rx_free_desc *rfd_desc;
1701         dma_addr_t mapping;
1702
1703         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1704         if (++next_next == rfd_ring->count)
1705                 next_next = 0;
1706         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1707         next_info = &rfd_ring->buffer_info[next_next];
1708
1709         while (next_info->flags & ATL1C_BUFFER_FREE) {
1710                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1711
1712                 skb = atl1c_alloc_skb(adapter);
1713                 if (unlikely(!skb)) {
1714                         if (netif_msg_rx_err(adapter))
1715                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1716                         break;
1717                 }
1718
1719                 /*
1720                  * Make buffer alignment 2 beyond a 16 byte boundary
1721                  * this will result in a 16 byte aligned IP header after
1722                  * the 14 byte MAC header is removed
1723                  */
1724                 vir_addr = skb->data;
1725                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1726                 buffer_info->skb = skb;
1727                 buffer_info->length = adapter->rx_buffer_len;
1728                 mapping = pci_map_single(pdev, vir_addr,
1729                                                 buffer_info->length,
1730                                                 PCI_DMA_FROMDEVICE);
1731                 if (unlikely(pci_dma_mapping_error(pdev, mapping))) {
1732                         dev_kfree_skb(skb);
1733                         buffer_info->skb = NULL;
1734                         buffer_info->length = 0;
1735                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1736                         netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed");
1737                         break;
1738                 }
1739                 buffer_info->dma = mapping;
1740                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1741                         ATL1C_PCIMAP_FROMDEVICE);
1742                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1743                 rfd_next_to_use = next_next;
1744                 if (++next_next == rfd_ring->count)
1745                         next_next = 0;
1746                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1747                 next_info = &rfd_ring->buffer_info[next_next];
1748                 num_alloc++;
1749         }
1750
1751         if (num_alloc) {
1752                 /* TODO: update mailbox here */
1753                 wmb();
1754                 rfd_ring->next_to_use = rfd_next_to_use;
1755                 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX,
1756                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1757         }
1758
1759         return num_alloc;
1760 }
1761
1762 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1763                         struct  atl1c_recv_ret_status *rrs, u16 num)
1764 {
1765         u16 i;
1766         /* the relationship between rrd and rfd is one map one */
1767         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1768                                         rrd_ring->next_to_clean)) {
1769                 rrs->word3 &= ~RRS_RXD_UPDATED;
1770                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1771                         rrd_ring->next_to_clean = 0;
1772         }
1773 }
1774
1775 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1776         struct atl1c_recv_ret_status *rrs, u16 num)
1777 {
1778         u16 i;
1779         u16 rfd_index;
1780         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1781
1782         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1783                         RRS_RX_RFD_INDEX_MASK;
1784         for (i = 0; i < num; i++) {
1785                 buffer_info[rfd_index].skb = NULL;
1786                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1787                                         ATL1C_BUFFER_FREE);
1788                 if (++rfd_index == rfd_ring->count)
1789                         rfd_index = 0;
1790         }
1791         rfd_ring->next_to_clean = rfd_index;
1792 }
1793
1794 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter,
1795                    int *work_done, int work_to_do)
1796 {
1797         u16 rfd_num, rfd_index;
1798         u16 count = 0;
1799         u16 length;
1800         struct pci_dev *pdev = adapter->pdev;
1801         struct net_device *netdev  = adapter->netdev;
1802         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring;
1803         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
1804         struct sk_buff *skb;
1805         struct atl1c_recv_ret_status *rrs;
1806         struct atl1c_buffer *buffer_info;
1807
1808         while (1) {
1809                 if (*work_done >= work_to_do)
1810                         break;
1811                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1812                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1813                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1814                                 RRS_RX_RFD_CNT_MASK;
1815                         if (unlikely(rfd_num != 1))
1816                                 /* TODO support mul rfd*/
1817                                 if (netif_msg_rx_err(adapter))
1818                                         dev_warn(&pdev->dev,
1819                                                 "Multi rfd not support yet!\n");
1820                         goto rrs_checked;
1821                 } else {
1822                         break;
1823                 }
1824 rrs_checked:
1825                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1826                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1827                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1828                                 if (netif_msg_rx_err(adapter))
1829                                         dev_warn(&pdev->dev,
1830                                                 "wrong packet! rrs word3 is %x\n",
1831                                                 rrs->word3);
1832                         continue;
1833                 }
1834
1835                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1836                                 RRS_PKT_SIZE_MASK);
1837                 /* Good Receive */
1838                 if (likely(rfd_num == 1)) {
1839                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1840                                         RRS_RX_RFD_INDEX_MASK;
1841                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1842                         pci_unmap_single(pdev, buffer_info->dma,
1843                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1844                         skb = buffer_info->skb;
1845                 } else {
1846                         /* TODO */
1847                         if (netif_msg_rx_err(adapter))
1848                                 dev_warn(&pdev->dev,
1849                                         "Multi rfd not support yet!\n");
1850                         break;
1851                 }
1852                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1853                 skb_put(skb, length - ETH_FCS_LEN);
1854                 skb->protocol = eth_type_trans(skb, netdev);
1855                 atl1c_rx_checksum(adapter, skb, rrs);
1856                 if (rrs->word3 & RRS_VLAN_INS) {
1857                         u16 vlan;
1858
1859                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1860                         vlan = le16_to_cpu(vlan);
1861                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1862                 }
1863                 netif_receive_skb(skb);
1864
1865                 (*work_done)++;
1866                 count++;
1867         }
1868         if (count)
1869                 atl1c_alloc_rx_buffer(adapter);
1870 }
1871
1872 /**
1873  * atl1c_clean - NAPI Rx polling callback
1874  */
1875 static int atl1c_clean(struct napi_struct *napi, int budget)
1876 {
1877         struct atl1c_adapter *adapter =
1878                         container_of(napi, struct atl1c_adapter, napi);
1879         int work_done = 0;
1880
1881         /* Keep link state information with original netdev */
1882         if (!netif_carrier_ok(adapter->netdev))
1883                 goto quit_polling;
1884         /* just enable one RXQ */
1885         atl1c_clean_rx_irq(adapter, &work_done, budget);
1886
1887         if (work_done < budget) {
1888 quit_polling:
1889                 napi_complete(napi);
1890                 adapter->hw.intr_mask |= ISR_RX_PKT;
1891                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1892         }
1893         return work_done;
1894 }
1895
1896 #ifdef CONFIG_NET_POLL_CONTROLLER
1897
1898 /*
1899  * Polling 'interrupt' - used by things like netconsole to send skbs
1900  * without having to re-enable interrupts. It's not called while
1901  * the interrupt routine is executing.
1902  */
1903 static void atl1c_netpoll(struct net_device *netdev)
1904 {
1905         struct atl1c_adapter *adapter = netdev_priv(netdev);
1906
1907         disable_irq(adapter->pdev->irq);
1908         atl1c_intr(adapter->pdev->irq, netdev);
1909         enable_irq(adapter->pdev->irq);
1910 }
1911 #endif
1912
1913 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1914 {
1915         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1916         u16 next_to_use = 0;
1917         u16 next_to_clean = 0;
1918
1919         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1920         next_to_use   = tpd_ring->next_to_use;
1921
1922         return (u16)(next_to_clean > next_to_use) ?
1923                 (next_to_clean - next_to_use - 1) :
1924                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1925 }
1926
1927 /*
1928  * get next usable tpd
1929  * Note: should call atl1c_tdp_avail to make sure
1930  * there is enough tpd to use
1931  */
1932 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1933         enum atl1c_trans_queue type)
1934 {
1935         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1936         struct atl1c_tpd_desc *tpd_desc;
1937         u16 next_to_use = 0;
1938
1939         next_to_use = tpd_ring->next_to_use;
1940         if (++tpd_ring->next_to_use == tpd_ring->count)
1941                 tpd_ring->next_to_use = 0;
1942         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1943         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1944         return  tpd_desc;
1945 }
1946
1947 static struct atl1c_buffer *
1948 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1949 {
1950         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1951
1952         return &tpd_ring->buffer_info[tpd -
1953                         (struct atl1c_tpd_desc *)tpd_ring->desc];
1954 }
1955
1956 /* Calculate the transmit packet descript needed*/
1957 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
1958 {
1959         u16 tpd_req;
1960         u16 proto_hdr_len = 0;
1961
1962         tpd_req = skb_shinfo(skb)->nr_frags + 1;
1963
1964         if (skb_is_gso(skb)) {
1965                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1966                 if (proto_hdr_len < skb_headlen(skb))
1967                         tpd_req++;
1968                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
1969                         tpd_req++;
1970         }
1971         return tpd_req;
1972 }
1973
1974 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
1975                           struct sk_buff *skb,
1976                           struct atl1c_tpd_desc **tpd,
1977                           enum atl1c_trans_queue type)
1978 {
1979         struct pci_dev *pdev = adapter->pdev;
1980         unsigned short offload_type;
1981         u8 hdr_len;
1982         u32 real_len;
1983
1984         if (skb_is_gso(skb)) {
1985                 int err;
1986
1987                 err = skb_cow_head(skb, 0);
1988                 if (err < 0)
1989                         return err;
1990
1991                 offload_type = skb_shinfo(skb)->gso_type;
1992
1993                 if (offload_type & SKB_GSO_TCPV4) {
1994                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
1995                                         + ntohs(ip_hdr(skb)->tot_len));
1996
1997                         if (real_len < skb->len)
1998                                 pskb_trim(skb, real_len);
1999
2000                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2001                         if (unlikely(skb->len == hdr_len)) {
2002                                 /* only xsum need */
2003                                 if (netif_msg_tx_queued(adapter))
2004                                         dev_warn(&pdev->dev,
2005                                                 "IPV4 tso with zero data??\n");
2006                                 goto check_sum;
2007                         } else {
2008                                 ip_hdr(skb)->check = 0;
2009                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2010                                                         ip_hdr(skb)->saddr,
2011                                                         ip_hdr(skb)->daddr,
2012                                                         0, IPPROTO_TCP, 0);
2013                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2014                         }
2015                 }
2016
2017                 if (offload_type & SKB_GSO_TCPV6) {
2018                         struct atl1c_tpd_ext_desc *etpd =
2019                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2020
2021                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2022                         *tpd = atl1c_get_tpd(adapter, type);
2023                         ipv6_hdr(skb)->payload_len = 0;
2024                         /* check payload == 0 byte ? */
2025                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2026                         if (unlikely(skb->len == hdr_len)) {
2027                                 /* only xsum need */
2028                                 if (netif_msg_tx_queued(adapter))
2029                                         dev_warn(&pdev->dev,
2030                                                 "IPV6 tso with zero data??\n");
2031                                 goto check_sum;
2032                         } else
2033                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2034                                                 &ipv6_hdr(skb)->saddr,
2035                                                 &ipv6_hdr(skb)->daddr,
2036                                                 0, IPPROTO_TCP, 0);
2037                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2038                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2039                         etpd->pkt_len = cpu_to_le32(skb->len);
2040                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2041                 }
2042
2043                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2044                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2045                                 TPD_TCPHDR_OFFSET_SHIFT;
2046                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2047                                 TPD_MSS_SHIFT;
2048                 return 0;
2049         }
2050
2051 check_sum:
2052         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2053                 u8 css, cso;
2054                 cso = skb_checksum_start_offset(skb);
2055
2056                 if (unlikely(cso & 0x1)) {
2057                         if (netif_msg_tx_err(adapter))
2058                                 dev_err(&adapter->pdev->dev,
2059                                         "payload offset should not an event number\n");
2060                         return -1;
2061                 } else {
2062                         css = cso + skb->csum_offset;
2063
2064                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2065                                         TPD_PLOADOFFSET_SHIFT;
2066                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2067                                         TPD_CCSUM_OFFSET_SHIFT;
2068                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2069                 }
2070         }
2071         return 0;
2072 }
2073
2074 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2075                               struct atl1c_tpd_desc *first_tpd,
2076                               enum atl1c_trans_queue type)
2077 {
2078         struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type];
2079         struct atl1c_buffer *buffer_info;
2080         struct atl1c_tpd_desc *tpd;
2081         u16 first_index, index;
2082
2083         first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2084         index = first_index;
2085         while (index != tpd_ring->next_to_use) {
2086                 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2087                 buffer_info = &tpd_ring->buffer_info[index];
2088                 atl1c_clean_buffer(adpt->pdev, buffer_info);
2089                 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2090                 if (++index == tpd_ring->count)
2091                         index = 0;
2092         }
2093         tpd_ring->next_to_use = first_index;
2094 }
2095
2096 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2097                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2098                         enum atl1c_trans_queue type)
2099 {
2100         struct atl1c_tpd_desc *use_tpd = NULL;
2101         struct atl1c_buffer *buffer_info = NULL;
2102         u16 buf_len = skb_headlen(skb);
2103         u16 map_len = 0;
2104         u16 mapped_len = 0;
2105         u16 hdr_len = 0;
2106         u16 nr_frags;
2107         u16 f;
2108         int tso;
2109
2110         nr_frags = skb_shinfo(skb)->nr_frags;
2111         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2112         if (tso) {
2113                 /* TSO */
2114                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2115                 use_tpd = tpd;
2116
2117                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2118                 buffer_info->length = map_len;
2119                 buffer_info->dma = pci_map_single(adapter->pdev,
2120                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2121                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2122                                                    buffer_info->dma)))
2123                         goto err_dma;
2124                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2125                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2126                         ATL1C_PCIMAP_TODEVICE);
2127                 mapped_len += map_len;
2128                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2129                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2130         }
2131
2132         if (mapped_len < buf_len) {
2133                 /* mapped_len == 0, means we should use the first tpd,
2134                    which is given by caller  */
2135                 if (mapped_len == 0)
2136                         use_tpd = tpd;
2137                 else {
2138                         use_tpd = atl1c_get_tpd(adapter, type);
2139                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2140                 }
2141                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2142                 buffer_info->length = buf_len - mapped_len;
2143                 buffer_info->dma =
2144                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2145                                         buffer_info->length, PCI_DMA_TODEVICE);
2146                 if (unlikely(pci_dma_mapping_error(adapter->pdev,
2147                                                    buffer_info->dma)))
2148                         goto err_dma;
2149
2150                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2151                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2152                         ATL1C_PCIMAP_TODEVICE);
2153                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2154                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2155         }
2156
2157         for (f = 0; f < nr_frags; f++) {
2158                 struct skb_frag_struct *frag;
2159
2160                 frag = &skb_shinfo(skb)->frags[f];
2161
2162                 use_tpd = atl1c_get_tpd(adapter, type);
2163                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2164
2165                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2166                 buffer_info->length = skb_frag_size(frag);
2167                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2168                                                     frag, 0,
2169                                                     buffer_info->length,
2170                                                     DMA_TO_DEVICE);
2171                 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2172                         goto err_dma;
2173
2174                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2175                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2176                         ATL1C_PCIMAP_TODEVICE);
2177                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2178                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2179         }
2180
2181         /* The last tpd */
2182         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2183         /* The last buffer info contain the skb address,
2184            so it will be free after unmap */
2185         buffer_info->skb = skb;
2186
2187         return 0;
2188
2189 err_dma:
2190         buffer_info->dma = 0;
2191         buffer_info->length = 0;
2192         return -1;
2193 }
2194
2195 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2196                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2197 {
2198         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2199         u16 reg;
2200
2201         reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
2202         AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
2203 }
2204
2205 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2206                                           struct net_device *netdev)
2207 {
2208         struct atl1c_adapter *adapter = netdev_priv(netdev);
2209         u16 tpd_req = 1;
2210         struct atl1c_tpd_desc *tpd;
2211         enum atl1c_trans_queue type = atl1c_trans_normal;
2212
2213         if (test_bit(__AT_DOWN, &adapter->flags)) {
2214                 dev_kfree_skb_any(skb);
2215                 return NETDEV_TX_OK;
2216         }
2217
2218         tpd_req = atl1c_cal_tpd_req(skb);
2219
2220         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2221                 /* no enough descriptor, just stop queue */
2222                 netif_stop_queue(netdev);
2223                 return NETDEV_TX_BUSY;
2224         }
2225
2226         tpd = atl1c_get_tpd(adapter, type);
2227
2228         /* do TSO and check sum */
2229         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2230                 dev_kfree_skb_any(skb);
2231                 return NETDEV_TX_OK;
2232         }
2233
2234         if (unlikely(skb_vlan_tag_present(skb))) {
2235                 u16 vlan = skb_vlan_tag_get(skb);
2236                 __le16 tag;
2237
2238                 vlan = cpu_to_le16(vlan);
2239                 AT_VLAN_TO_TAG(vlan, tag);
2240                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2241                 tpd->vlan_tag = tag;
2242         }
2243
2244         if (skb_network_offset(skb) != ETH_HLEN)
2245                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2246
2247         if (atl1c_tx_map(adapter, skb, tpd, type) < 0) {
2248                 netif_info(adapter, tx_done, adapter->netdev,
2249                            "tx-skb droppted due to dma error\n");
2250                 /* roll back tpd/buffer */
2251                 atl1c_tx_rollback(adapter, tpd, type);
2252                 dev_kfree_skb_any(skb);
2253         } else {
2254                 netdev_sent_queue(adapter->netdev, skb->len);
2255                 atl1c_tx_queue(adapter, skb, tpd, type);
2256         }
2257
2258         return NETDEV_TX_OK;
2259 }
2260
2261 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2262 {
2263         struct net_device *netdev = adapter->netdev;
2264
2265         free_irq(adapter->pdev->irq, netdev);
2266
2267         if (adapter->have_msi)
2268                 pci_disable_msi(adapter->pdev);
2269 }
2270
2271 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2272 {
2273         struct pci_dev    *pdev   = adapter->pdev;
2274         struct net_device *netdev = adapter->netdev;
2275         int flags = 0;
2276         int err = 0;
2277
2278         adapter->have_msi = true;
2279         err = pci_enable_msi(adapter->pdev);
2280         if (err) {
2281                 if (netif_msg_ifup(adapter))
2282                         dev_err(&pdev->dev,
2283                                 "Unable to allocate MSI interrupt Error: %d\n",
2284                                 err);
2285                 adapter->have_msi = false;
2286         }
2287
2288         if (!adapter->have_msi)
2289                 flags |= IRQF_SHARED;
2290         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2291                         netdev->name, netdev);
2292         if (err) {
2293                 if (netif_msg_ifup(adapter))
2294                         dev_err(&pdev->dev,
2295                                 "Unable to allocate interrupt Error: %d\n",
2296                                 err);
2297                 if (adapter->have_msi)
2298                         pci_disable_msi(adapter->pdev);
2299                 return err;
2300         }
2301         if (netif_msg_ifup(adapter))
2302                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2303         return err;
2304 }
2305
2306
2307 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2308 {
2309         /* release tx-pending skbs and reset tx/rx ring index */
2310         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2311         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2312         atl1c_clean_rx_ring(adapter);
2313 }
2314
2315 static int atl1c_up(struct atl1c_adapter *adapter)
2316 {
2317         struct net_device *netdev = adapter->netdev;
2318         int err;
2319
2320         netif_carrier_off(netdev);
2321
2322         err = atl1c_configure(adapter);
2323         if (unlikely(err))
2324                 goto err_up;
2325
2326         err = atl1c_request_irq(adapter);
2327         if (unlikely(err))
2328                 goto err_up;
2329
2330         atl1c_check_link_status(adapter);
2331         clear_bit(__AT_DOWN, &adapter->flags);
2332         napi_enable(&adapter->napi);
2333         atl1c_irq_enable(adapter);
2334         netif_start_queue(netdev);
2335         return err;
2336
2337 err_up:
2338         atl1c_clean_rx_ring(adapter);
2339         return err;
2340 }
2341
2342 static void atl1c_down(struct atl1c_adapter *adapter)
2343 {
2344         struct net_device *netdev = adapter->netdev;
2345
2346         atl1c_del_timer(adapter);
2347         adapter->work_event = 0; /* clear all event */
2348         /* signal that we're down so the interrupt handler does not
2349          * reschedule our watchdog timer */
2350         set_bit(__AT_DOWN, &adapter->flags);
2351         netif_carrier_off(netdev);
2352         napi_disable(&adapter->napi);
2353         atl1c_irq_disable(adapter);
2354         atl1c_free_irq(adapter);
2355         /* disable ASPM if device inactive */
2356         atl1c_disable_l0s_l1(&adapter->hw);
2357         /* reset MAC to disable all RX/TX */
2358         atl1c_reset_mac(&adapter->hw);
2359         msleep(1);
2360
2361         adapter->link_speed = SPEED_0;
2362         adapter->link_duplex = -1;
2363         atl1c_reset_dma_ring(adapter);
2364 }
2365
2366 /**
2367  * atl1c_open - Called when a network interface is made active
2368  * @netdev: network interface device structure
2369  *
2370  * Returns 0 on success, negative value on failure
2371  *
2372  * The open entry point is called when a network interface is made
2373  * active by the system (IFF_UP).  At this point all resources needed
2374  * for transmit and receive operations are allocated, the interrupt
2375  * handler is registered with the OS, the watchdog timer is started,
2376  * and the stack is notified that the interface is ready.
2377  */
2378 static int atl1c_open(struct net_device *netdev)
2379 {
2380         struct atl1c_adapter *adapter = netdev_priv(netdev);
2381         int err;
2382
2383         /* disallow open during test */
2384         if (test_bit(__AT_TESTING, &adapter->flags))
2385                 return -EBUSY;
2386
2387         /* allocate rx/tx dma buffer & descriptors */
2388         err = atl1c_setup_ring_resources(adapter);
2389         if (unlikely(err))
2390                 return err;
2391
2392         err = atl1c_up(adapter);
2393         if (unlikely(err))
2394                 goto err_up;
2395
2396         return 0;
2397
2398 err_up:
2399         atl1c_free_irq(adapter);
2400         atl1c_free_ring_resources(adapter);
2401         atl1c_reset_mac(&adapter->hw);
2402         return err;
2403 }
2404
2405 /**
2406  * atl1c_close - Disables a network interface
2407  * @netdev: network interface device structure
2408  *
2409  * Returns 0, this is not allowed to fail
2410  *
2411  * The close entry point is called when an interface is de-activated
2412  * by the OS.  The hardware is still under the drivers control, but
2413  * needs to be disabled.  A global MAC reset is issued to stop the
2414  * hardware, and all transmit and receive resources are freed.
2415  */
2416 static int atl1c_close(struct net_device *netdev)
2417 {
2418         struct atl1c_adapter *adapter = netdev_priv(netdev);
2419
2420         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2421         set_bit(__AT_DOWN, &adapter->flags);
2422         cancel_work_sync(&adapter->common_task);
2423         atl1c_down(adapter);
2424         atl1c_free_ring_resources(adapter);
2425         return 0;
2426 }
2427
2428 static int atl1c_suspend(struct device *dev)
2429 {
2430         struct pci_dev *pdev = to_pci_dev(dev);
2431         struct net_device *netdev = pci_get_drvdata(pdev);
2432         struct atl1c_adapter *adapter = netdev_priv(netdev);
2433         struct atl1c_hw *hw = &adapter->hw;
2434         u32 wufc = adapter->wol;
2435
2436         atl1c_disable_l0s_l1(hw);
2437         if (netif_running(netdev)) {
2438                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2439                 atl1c_down(adapter);
2440         }
2441         netif_device_detach(netdev);
2442
2443         if (wufc)
2444                 if (atl1c_phy_to_ps_link(hw) != 0)
2445                         dev_dbg(&pdev->dev, "phy power saving failed");
2446
2447         atl1c_power_saving(hw, wufc);
2448
2449         return 0;
2450 }
2451
2452 #ifdef CONFIG_PM_SLEEP
2453 static int atl1c_resume(struct device *dev)
2454 {
2455         struct pci_dev *pdev = to_pci_dev(dev);
2456         struct net_device *netdev = pci_get_drvdata(pdev);
2457         struct atl1c_adapter *adapter = netdev_priv(netdev);
2458
2459         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2460         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2461
2462         atl1c_phy_reset(&adapter->hw);
2463         atl1c_reset_mac(&adapter->hw);
2464         atl1c_phy_init(&adapter->hw);
2465
2466 #if 0
2467         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2468         pm_data &= ~PM_CTRLSTAT_PME_EN;
2469         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2470 #endif
2471
2472         netif_device_attach(netdev);
2473         if (netif_running(netdev))
2474                 atl1c_up(adapter);
2475
2476         return 0;
2477 }
2478 #endif
2479
2480 static void atl1c_shutdown(struct pci_dev *pdev)
2481 {
2482         struct net_device *netdev = pci_get_drvdata(pdev);
2483         struct atl1c_adapter *adapter = netdev_priv(netdev);
2484
2485         atl1c_suspend(&pdev->dev);
2486         pci_wake_from_d3(pdev, adapter->wol);
2487         pci_set_power_state(pdev, PCI_D3hot);
2488 }
2489
2490 static const struct net_device_ops atl1c_netdev_ops = {
2491         .ndo_open               = atl1c_open,
2492         .ndo_stop               = atl1c_close,
2493         .ndo_validate_addr      = eth_validate_addr,
2494         .ndo_start_xmit         = atl1c_xmit_frame,
2495         .ndo_set_mac_address    = atl1c_set_mac_addr,
2496         .ndo_set_rx_mode        = atl1c_set_multi,
2497         .ndo_change_mtu         = atl1c_change_mtu,
2498         .ndo_fix_features       = atl1c_fix_features,
2499         .ndo_set_features       = atl1c_set_features,
2500         .ndo_do_ioctl           = atl1c_ioctl,
2501         .ndo_tx_timeout         = atl1c_tx_timeout,
2502         .ndo_get_stats          = atl1c_get_stats,
2503 #ifdef CONFIG_NET_POLL_CONTROLLER
2504         .ndo_poll_controller    = atl1c_netpoll,
2505 #endif
2506 };
2507
2508 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2509 {
2510         SET_NETDEV_DEV(netdev, &pdev->dev);
2511         pci_set_drvdata(pdev, netdev);
2512
2513         netdev->netdev_ops = &atl1c_netdev_ops;
2514         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2515         atl1c_set_ethtool_ops(netdev);
2516
2517         /* TODO: add when ready */
2518         netdev->hw_features =   NETIF_F_SG              |
2519                                 NETIF_F_HW_CSUM         |
2520                                 NETIF_F_HW_VLAN_CTAG_RX |
2521                                 NETIF_F_TSO             |
2522                                 NETIF_F_TSO6;
2523         netdev->features =      netdev->hw_features     |
2524                                 NETIF_F_HW_VLAN_CTAG_TX;
2525         return 0;
2526 }
2527
2528 /**
2529  * atl1c_probe - Device Initialization Routine
2530  * @pdev: PCI device information struct
2531  * @ent: entry in atl1c_pci_tbl
2532  *
2533  * Returns 0 on success, negative on failure
2534  *
2535  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2536  * The OS initialization, configuring of the adapter private structure,
2537  * and a hardware reset occur.
2538  */
2539 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2540 {
2541         struct net_device *netdev;
2542         struct atl1c_adapter *adapter;
2543         static int cards_found;
2544
2545         int err = 0;
2546
2547         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2548         err = pci_enable_device_mem(pdev);
2549         if (err) {
2550                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2551                 return err;
2552         }
2553
2554         /*
2555          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2556          * shared register for the high 32 bits, so only a single, aligned,
2557          * 4 GB physical address range can be used at a time.
2558          *
2559          * Supporting 64-bit DMA on this hardware is more trouble than it's
2560          * worth.  It is far easier to limit to 32-bit DMA than update
2561          * various kernel subsystems to support the mechanics required by a
2562          * fixed-high-32-bit system.
2563          */
2564         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2565             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2566                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2567                 goto err_dma;
2568         }
2569
2570         err = pci_request_regions(pdev, atl1c_driver_name);
2571         if (err) {
2572                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2573                 goto err_pci_reg;
2574         }
2575
2576         pci_set_master(pdev);
2577
2578         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2579         if (netdev == NULL) {
2580                 err = -ENOMEM;
2581                 goto err_alloc_etherdev;
2582         }
2583
2584         err = atl1c_init_netdev(netdev, pdev);
2585         if (err) {
2586                 dev_err(&pdev->dev, "init netdevice failed\n");
2587                 goto err_init_netdev;
2588         }
2589         adapter = netdev_priv(netdev);
2590         adapter->bd_number = cards_found;
2591         adapter->netdev = netdev;
2592         adapter->pdev = pdev;
2593         adapter->hw.adapter = adapter;
2594         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2595         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2596         if (!adapter->hw.hw_addr) {
2597                 err = -EIO;
2598                 dev_err(&pdev->dev, "cannot map device registers\n");
2599                 goto err_ioremap;
2600         }
2601
2602         /* init mii data */
2603         adapter->mii.dev = netdev;
2604         adapter->mii.mdio_read  = atl1c_mdio_read;
2605         adapter->mii.mdio_write = atl1c_mdio_write;
2606         adapter->mii.phy_id_mask = 0x1f;
2607         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2608         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2609         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2610                         (unsigned long)adapter);
2611         /* setup the private structure */
2612         err = atl1c_sw_init(adapter);
2613         if (err) {
2614                 dev_err(&pdev->dev, "net device private data init failed\n");
2615                 goto err_sw_init;
2616         }
2617         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2618
2619         /* Init GPHY as early as possible due to power saving issue  */
2620         atl1c_phy_reset(&adapter->hw);
2621
2622         err = atl1c_reset_mac(&adapter->hw);
2623         if (err) {
2624                 err = -EIO;
2625                 goto err_reset;
2626         }
2627
2628         /* reset the controller to
2629          * put the device in a known good starting state */
2630         err = atl1c_phy_init(&adapter->hw);
2631         if (err) {
2632                 err = -EIO;
2633                 goto err_reset;
2634         }
2635         if (atl1c_read_mac_addr(&adapter->hw)) {
2636                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2637                 netdev->addr_assign_type = NET_ADDR_RANDOM;
2638         }
2639         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2640         if (netif_msg_probe(adapter))
2641                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2642                         adapter->hw.mac_addr);
2643
2644         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2645         INIT_WORK(&adapter->common_task, atl1c_common_task);
2646         adapter->work_event = 0;
2647         err = register_netdev(netdev);
2648         if (err) {
2649                 dev_err(&pdev->dev, "register netdevice failed\n");
2650                 goto err_register;
2651         }
2652
2653         if (netif_msg_probe(adapter))
2654                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2655         cards_found++;
2656         return 0;
2657
2658 err_reset:
2659 err_register:
2660 err_sw_init:
2661         iounmap(adapter->hw.hw_addr);
2662 err_init_netdev:
2663 err_ioremap:
2664         free_netdev(netdev);
2665 err_alloc_etherdev:
2666         pci_release_regions(pdev);
2667 err_pci_reg:
2668 err_dma:
2669         pci_disable_device(pdev);
2670         return err;
2671 }
2672
2673 /**
2674  * atl1c_remove - Device Removal Routine
2675  * @pdev: PCI device information struct
2676  *
2677  * atl1c_remove is called by the PCI subsystem to alert the driver
2678  * that it should release a PCI device.  The could be caused by a
2679  * Hot-Plug event, or because the driver is going to be removed from
2680  * memory.
2681  */
2682 static void atl1c_remove(struct pci_dev *pdev)
2683 {
2684         struct net_device *netdev = pci_get_drvdata(pdev);
2685         struct atl1c_adapter *adapter = netdev_priv(netdev);
2686
2687         unregister_netdev(netdev);
2688         /* restore permanent address */
2689         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2690         atl1c_phy_disable(&adapter->hw);
2691
2692         iounmap(adapter->hw.hw_addr);
2693
2694         pci_release_regions(pdev);
2695         pci_disable_device(pdev);
2696         free_netdev(netdev);
2697 }
2698
2699 /**
2700  * atl1c_io_error_detected - called when PCI error is detected
2701  * @pdev: Pointer to PCI device
2702  * @state: The current pci connection state
2703  *
2704  * This function is called after a PCI bus error affecting
2705  * this device has been detected.
2706  */
2707 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2708                                                 pci_channel_state_t state)
2709 {
2710         struct net_device *netdev = pci_get_drvdata(pdev);
2711         struct atl1c_adapter *adapter = netdev_priv(netdev);
2712
2713         netif_device_detach(netdev);
2714
2715         if (state == pci_channel_io_perm_failure)
2716                 return PCI_ERS_RESULT_DISCONNECT;
2717
2718         if (netif_running(netdev))
2719                 atl1c_down(adapter);
2720
2721         pci_disable_device(pdev);
2722
2723         /* Request a slot slot reset. */
2724         return PCI_ERS_RESULT_NEED_RESET;
2725 }
2726
2727 /**
2728  * atl1c_io_slot_reset - called after the pci bus has been reset.
2729  * @pdev: Pointer to PCI device
2730  *
2731  * Restart the card from scratch, as if from a cold-boot. Implementation
2732  * resembles the first-half of the e1000_resume routine.
2733  */
2734 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2735 {
2736         struct net_device *netdev = pci_get_drvdata(pdev);
2737         struct atl1c_adapter *adapter = netdev_priv(netdev);
2738
2739         if (pci_enable_device(pdev)) {
2740                 if (netif_msg_hw(adapter))
2741                         dev_err(&pdev->dev,
2742                                 "Cannot re-enable PCI device after reset\n");
2743                 return PCI_ERS_RESULT_DISCONNECT;
2744         }
2745         pci_set_master(pdev);
2746
2747         pci_enable_wake(pdev, PCI_D3hot, 0);
2748         pci_enable_wake(pdev, PCI_D3cold, 0);
2749
2750         atl1c_reset_mac(&adapter->hw);
2751
2752         return PCI_ERS_RESULT_RECOVERED;
2753 }
2754
2755 /**
2756  * atl1c_io_resume - called when traffic can start flowing again.
2757  * @pdev: Pointer to PCI device
2758  *
2759  * This callback is called when the error recovery driver tells us that
2760  * its OK to resume normal operation. Implementation resembles the
2761  * second-half of the atl1c_resume routine.
2762  */
2763 static void atl1c_io_resume(struct pci_dev *pdev)
2764 {
2765         struct net_device *netdev = pci_get_drvdata(pdev);
2766         struct atl1c_adapter *adapter = netdev_priv(netdev);
2767
2768         if (netif_running(netdev)) {
2769                 if (atl1c_up(adapter)) {
2770                         if (netif_msg_hw(adapter))
2771                                 dev_err(&pdev->dev,
2772                                         "Cannot bring device back up after reset\n");
2773                         return;
2774                 }
2775         }
2776
2777         netif_device_attach(netdev);
2778 }
2779
2780 static const struct pci_error_handlers atl1c_err_handler = {
2781         .error_detected = atl1c_io_error_detected,
2782         .slot_reset = atl1c_io_slot_reset,
2783         .resume = atl1c_io_resume,
2784 };
2785
2786 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2787
2788 static struct pci_driver atl1c_driver = {
2789         .name     = atl1c_driver_name,
2790         .id_table = atl1c_pci_tbl,
2791         .probe    = atl1c_probe,
2792         .remove   = atl1c_remove,
2793         .shutdown = atl1c_shutdown,
2794         .err_handler = &atl1c_err_handler,
2795         .driver.pm = &atl1c_pm_ops,
2796 };
2797
2798 module_pci_driver(atl1c_driver);