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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   4  *
   5  * Derived from Intel e1000 driver
   6  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   7  */
   8
   9 #include "atl1c.h"
  10
  11 char atl1c_driver_name[] = "atl1c";
  12
  13 /*
  14  * atl1c_pci_tbl - PCI Device ID Table
  15  *
  16  * Wildcard entries (PCI_ANY_ID) should come last
  17  * Last entry must be all 0s
  18  *
  19  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  20  *   Class, Class Mask, private data (not used) }
  21  */
  22 static const struct pci_device_id atl1c_pci_tbl[] = {
  23         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  24         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  25         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  26         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  27         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  28         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  29         /* required last entry */
  30         { 0 }
  31 };
  32 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  33
  34 MODULE_AUTHOR("Jie Yang");
  35 MODULE_AUTHOR("Qualcomm Atheros Inc.");
  36 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
  37 MODULE_LICENSE("GPL");
  38
  39 struct atl1c_qregs {
  40         u16 tpd_addr_lo;
  41         u16 tpd_prod;
  42         u16 tpd_cons;
  43         u16 rfd_addr_lo;
  44         u16 rrd_addr_lo;
  45         u16 rfd_prod;
  46         u32 tx_isr;
  47         u32 rx_isr;
  48 };
  49
  50 static struct atl1c_qregs atl1c_qregs[AT_MAX_TRANSMIT_QUEUE] = {
  51         {
  52                 REG_TPD_PRI0_ADDR_LO, REG_TPD_PRI0_PIDX, REG_TPD_PRI0_CIDX,
  53                 REG_RFD0_HEAD_ADDR_LO, REG_RRD0_HEAD_ADDR_LO,
  54                 REG_MB_RFD0_PROD_IDX, ISR_TX_PKT_0, ISR_RX_PKT_0
  55         },
  56         {
  57                 REG_TPD_PRI1_ADDR_LO, REG_TPD_PRI1_PIDX, REG_TPD_PRI1_CIDX,
  58                 REG_RFD1_HEAD_ADDR_LO, REG_RRD1_HEAD_ADDR_LO,
  59                 REG_MB_RFD1_PROD_IDX, ISR_TX_PKT_1, ISR_RX_PKT_1
  60         },
  61         {
  62                 REG_TPD_PRI2_ADDR_LO, REG_TPD_PRI2_PIDX, REG_TPD_PRI2_CIDX,
  63                 REG_RFD2_HEAD_ADDR_LO, REG_RRD2_HEAD_ADDR_LO,
  64                 REG_MB_RFD2_PROD_IDX, ISR_TX_PKT_2, ISR_RX_PKT_2
  65         },
  66         {
  67                 REG_TPD_PRI3_ADDR_LO, REG_TPD_PRI3_PIDX, REG_TPD_PRI3_CIDX,
  68                 REG_RFD3_HEAD_ADDR_LO, REG_RRD3_HEAD_ADDR_LO,
  69                 REG_MB_RFD3_PROD_IDX, ISR_TX_PKT_3, ISR_RX_PKT_3
  70         },
  71 };
  72
  73 static int atl1c_stop_mac(struct atl1c_hw *hw);
  74 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  75 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
  76 static void atl1c_start_mac(struct atl1c_adapter *adapter);
  77 static int atl1c_up(struct atl1c_adapter *adapter);
  78 static void atl1c_down(struct atl1c_adapter *adapter);
  79 static int atl1c_reset_mac(struct atl1c_hw *hw);
  80 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
  81 static int atl1c_configure(struct atl1c_adapter *adapter);
  82 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue,
  83                                  bool napi_mode);
  84
  85
  86 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  87         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  88 static void atl1c_pcie_patch(struct atl1c_hw *hw)
  89 {
  90         u32 mst_data, data;
  91
  92         /* pclk sel could switch to 25M */
  93         AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
  94         mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
  95         AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
  96
  97         /* WoL/PCIE related settings */
  98         if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
  99                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
 100                 data |= PCIE_PHYMISC_FORCE_RCV_DET;
 101                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
 102         } else { /* new dev set bit5 of MASTER */
 103                 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
 104                         AT_WRITE_REG(hw, REG_MASTER_CTRL,
 105                                 mst_data | MASTER_CTRL_WAKEN_25M);
 106         }
 107         /* aspm/PCIE setting only for l2cb 1.0 */
 108         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
 109                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
 110                 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
 111                         L2CB1_PCIE_PHYMISC2_CDR_BW);
 112                 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
 113                         L2CB1_PCIE_PHYMISC2_L0S_TH);
 114                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
 115                 /* extend L1 sync timer */
 116                 AT_READ_REG(hw, REG_LINK_CTRL, &data);
 117                 data |= LINK_CTRL_EXT_SYNC;
 118                 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
 119         }
 120         /* l2cb 1.x & l1d 1.x */
 121         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
 122                 AT_READ_REG(hw, REG_PM_CTRL, &data);
 123                 data |= PM_CTRL_L0S_BUFSRX_EN;
 124                 AT_WRITE_REG(hw, REG_PM_CTRL, data);
 125                 /* clear vendor msg */
 126                 AT_READ_REG(hw, REG_DMA_DBG, &data);
 127                 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
 128         }
 129 }
 130
 131 /* FIXME: no need any more ? */
 132 /*
 133  * atl1c_init_pcie - init PCIE module
 134  */
 135 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 136 {
 137         u32 data;
 138         u32 pci_cmd;
 139         struct pci_dev *pdev = hw->adapter->pdev;
 140         int pos;
 141
 142         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 143         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 144         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 145                 PCI_COMMAND_IO);
 146         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 147
 148         /*
 149          * Clear any PowerSaveing Settings
 150          */
 151         pci_enable_wake(pdev, PCI_D3hot, 0);
 152         pci_enable_wake(pdev, PCI_D3cold, 0);
 153         /* wol sts read-clear */
 154         AT_READ_REG(hw, REG_WOL_CTRL, &data);
 155         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
 156
 157         /*
 158          * Mask some pcie error bits
 159          */
 160         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 161         if (pos) {
 162                 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
 163                 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
 164                 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
 165         }
 166         /* clear error status */
 167         pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
 168                         PCI_EXP_DEVSTA_NFED |
 169                         PCI_EXP_DEVSTA_FED |
 170                         PCI_EXP_DEVSTA_CED |
 171                         PCI_EXP_DEVSTA_URD);
 172
 173         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 174         data &= ~LTSSM_ID_EN_WRO;
 175         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 176
 177         atl1c_pcie_patch(hw);
 178         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 179                 atl1c_disable_l0s_l1(hw);
 180
 181         msleep(5);
 182 }
 183
 184 /**
 185  * atl1c_irq_enable - Enable default interrupt generation settings
 186  * @adapter: board private structure
 187  */
 188 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 189 {
 190         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 191                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 192                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 193                 AT_WRITE_FLUSH(&adapter->hw);
 194         }
 195 }
 196
 197 /**
 198  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 199  * @adapter: board private structure
 200  */
 201 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 202 {
 203         atomic_inc(&adapter->irq_sem);
 204         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 205         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 206         AT_WRITE_FLUSH(&adapter->hw);
 207         synchronize_irq(adapter->pdev->irq);
 208 }
 209
 210 /*
 211  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 212  * of the idle status register until the device is actually idle
 213  */
 214 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
 215 {
 216         int timeout;
 217         u32 data;
 218
 219         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 220                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 221                 if ((data & modu_ctrl) == 0)
 222                         return 0;
 223                 msleep(1);
 224         }
 225         return data;
 226 }
 227
 228 /**
 229  * atl1c_phy_config - Timer Call-back
 230  * @t: timer list containing pointer to netdev cast into an unsigned long
 231  */
 232 static void atl1c_phy_config(struct timer_list *t)
 233 {
 234         struct atl1c_adapter *adapter = from_timer(adapter, t,
 235                                                    phy_config_timer);
 236         struct atl1c_hw *hw = &adapter->hw;
 237         unsigned long flags;
 238
 239         spin_lock_irqsave(&adapter->mdio_lock, flags);
 240         atl1c_restart_autoneg(hw);
 241         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 242 }
 243
 244 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 245 {
 246         atl1c_down(adapter);
 247         atl1c_up(adapter);
 248         clear_bit(__AT_RESETTING, &adapter->flags);
 249 }
 250
 251 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 252 {
 253         struct atl1c_hw *hw = &adapter->hw;
 254         struct net_device *netdev = adapter->netdev;
 255         struct pci_dev    *pdev   = adapter->pdev;
 256         int err;
 257         unsigned long flags;
 258         u16 speed, duplex;
 259         bool link;
 260
 261         spin_lock_irqsave(&adapter->mdio_lock, flags);
 262         link = atl1c_get_link_status(hw);
 263         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 264
 265         if (!link) {
 266                 /* link down */
 267                 netif_carrier_off(netdev);
 268                 hw->hibernate = true;
 269                 if (atl1c_reset_mac(hw) != 0)
 270                         if (netif_msg_hw(adapter))
 271                                 dev_warn(&pdev->dev, "reset mac failed\n");
 272                 atl1c_set_aspm(hw, SPEED_0);
 273                 atl1c_post_phy_linkchg(hw, SPEED_0);
 274                 atl1c_reset_dma_ring(adapter);
 275                 atl1c_configure(adapter);
 276         } else {
 277                 /* Link Up */
 278                 hw->hibernate = false;
 279                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 280                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 281                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 282                 if (unlikely(err))
 283                         return;
 284                 /* link result is our setting */
 285                 if (adapter->link_speed != speed ||
 286                     adapter->link_duplex != duplex) {
 287                         adapter->link_speed  = speed;
 288                         adapter->link_duplex = duplex;
 289                         atl1c_set_aspm(hw, speed);
 290                         atl1c_post_phy_linkchg(hw, speed);
 291                         atl1c_start_mac(adapter);
 292                         if (netif_msg_link(adapter))
 293                                 dev_info(&pdev->dev,
 294                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 295                                         atl1c_driver_name, netdev->name,
 296                                         adapter->link_speed,
 297                                         adapter->link_duplex == FULL_DUPLEX ?
 298                                         "Full Duplex" : "Half Duplex");
 299                 }
 300                 if (!netif_carrier_ok(netdev))
 301                         netif_carrier_on(netdev);
 302         }
 303 }
 304
 305 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 306 {
 307         struct net_device *netdev = adapter->netdev;
 308         struct pci_dev    *pdev   = adapter->pdev;
 309         bool link;
 310
 311         spin_lock(&adapter->mdio_lock);
 312         link = atl1c_get_link_status(&adapter->hw);
 313         spin_unlock(&adapter->mdio_lock);
 314         /* notify upper layer link down ASAP */
 315         if (!link) {
 316                 if (netif_carrier_ok(netdev)) {
 317                         /* old link state: Up */
 318                         netif_carrier_off(netdev);
 319                         if (netif_msg_link(adapter))
 320                                 dev_info(&pdev->dev,
 321                                         "%s: %s NIC Link is Down\n",
 322                                         atl1c_driver_name, netdev->name);
 323                         adapter->link_speed = SPEED_0;
 324                 }
 325         }
 326
 327         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 328         schedule_work(&adapter->common_task);
 329 }
 330
 331 static void atl1c_common_task(struct work_struct *work)
 332 {
 333         struct atl1c_adapter *adapter;
 334         struct net_device *netdev;
 335
 336         adapter = container_of(work, struct atl1c_adapter, common_task);
 337         netdev = adapter->netdev;
 338
 339         if (test_bit(__AT_DOWN, &adapter->flags))
 340                 return;
 341
 342         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 343                 netif_device_detach(netdev);
 344                 atl1c_down(adapter);
 345                 atl1c_up(adapter);
 346                 netif_device_attach(netdev);
 347         }
 348
 349         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 350                 &adapter->work_event)) {
 351                 atl1c_irq_disable(adapter);
 352                 atl1c_check_link_status(adapter);
 353                 atl1c_irq_enable(adapter);
 354         }
 355 }
 356
 357
 358 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 359 {
 360         del_timer_sync(&adapter->phy_config_timer);
 361 }
 362
 363
 364 /**
 365  * atl1c_tx_timeout - Respond to a Tx Hang
 366  * @netdev: network interface device structure
 367  * @txqueue: index of hanging tx queue
 368  */
 369 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 370 {
 371         struct atl1c_adapter *adapter = netdev_priv(netdev);
 372
 373         /* Do the reset outside of interrupt context */
 374         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 375         schedule_work(&adapter->common_task);
 376 }
 377
 378 /**
 379  * atl1c_set_multi - Multicast and Promiscuous mode set
 380  * @netdev: network interface device structure
 381  *
 382  * The set_multi entry point is called whenever the multicast address
 383  * list or the network interface flags are updated.  This routine is
 384  * responsible for configuring the hardware for proper multicast,
 385  * promiscuous mode, and all-multi behavior.
 386  */
 387 static void atl1c_set_multi(struct net_device *netdev)
 388 {
 389         struct atl1c_adapter *adapter = netdev_priv(netdev);
 390         struct atl1c_hw *hw = &adapter->hw;
 391         struct netdev_hw_addr *ha;
 392         u32 mac_ctrl_data;
 393         u32 hash_value;
 394
 395         /* Check for Promiscuous and All Multicast modes */
 396         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 397
 398         if (netdev->flags & IFF_PROMISC) {
 399                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 400         } else if (netdev->flags & IFF_ALLMULTI) {
 401                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 402                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 403         } else {
 404                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 405         }
 406
 407         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 408
 409         /* clear the old settings from the multicast hash table */
 410         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 411         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 412
 413         /* comoute mc addresses' hash value ,and put it into hash table */
 414         netdev_for_each_mc_addr(ha, netdev) {
 415                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 416                 atl1c_hash_set(hw, hash_value);
 417         }
 418 }
 419
 420 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 421 {
 422         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 423                 /* enable VLAN tag insert/strip */
 424                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 425         } else {
 426                 /* disable VLAN tag insert/strip */
 427                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 428         }
 429 }
 430
 431 static void atl1c_vlan_mode(struct net_device *netdev,
 432         netdev_features_t features)
 433 {
 434         struct atl1c_adapter *adapter = netdev_priv(netdev);
 435         struct pci_dev *pdev = adapter->pdev;
 436         u32 mac_ctrl_data = 0;
 437
 438         if (netif_msg_pktdata(adapter))
 439                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 440
 441         atl1c_irq_disable(adapter);
 442         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 443         __atl1c_vlan_mode(features, &mac_ctrl_data);
 444         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 445         atl1c_irq_enable(adapter);
 446 }
 447
 448 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 449 {
 450         struct pci_dev *pdev = adapter->pdev;
 451
 452         if (netif_msg_pktdata(adapter))
 453                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 454         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 455 }
 456
 457 /**
 458  * atl1c_set_mac_addr - Change the Ethernet Address of the NIC
 459  * @netdev: network interface device structure
 460  * @p: pointer to an address structure
 461  *
 462  * Returns 0 on success, negative on failure
 463  */
 464 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 465 {
 466         struct atl1c_adapter *adapter = netdev_priv(netdev);
 467         struct sockaddr *addr = p;
 468
 469         if (!is_valid_ether_addr(addr->sa_data))
 470                 return -EADDRNOTAVAIL;
 471
 472         if (netif_running(netdev))
 473                 return -EBUSY;
 474
 475         eth_hw_addr_set(netdev, addr->sa_data);
 476         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 477
 478         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
 479
 480         return 0;
 481 }
 482
 483 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 484                                 struct net_device *dev)
 485 {
 486         int mtu = dev->mtu;
 487
 488         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 489                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 490 }
 491
 492 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 493         netdev_features_t features)
 494 {
 495         struct atl1c_adapter *adapter = netdev_priv(netdev);
 496         struct atl1c_hw *hw = &adapter->hw;
 497
 498         /*
 499          * Since there is no support for separate rx/tx vlan accel
 500          * enable/disable make sure tx flag is always in same state as rx.
 501          */
 502         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 503                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 504         else
 505                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 506
 507         if (hw->nic_type != athr_mt) {
 508                 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 509                         features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 510         }
 511
 512         return features;
 513 }
 514
 515 static int atl1c_set_features(struct net_device *netdev,
 516         netdev_features_t features)
 517 {
 518         netdev_features_t changed = netdev->features ^ features;
 519
 520         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 521                 atl1c_vlan_mode(netdev, features);
 522
 523         return 0;
 524 }
 525
 526 static void atl1c_set_max_mtu(struct net_device *netdev)
 527 {
 528         struct atl1c_adapter *adapter = netdev_priv(netdev);
 529         struct atl1c_hw *hw = &adapter->hw;
 530
 531         switch (hw->nic_type) {
 532         /* These (GbE) devices support jumbo packets, max_mtu 6122 */
 533         case athr_l1c:
 534         case athr_l1d:
 535         case athr_l1d_2:
 536                 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
 537                         (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
 538                 break;
 539         case athr_mt:
 540                 netdev->max_mtu = 9500;
 541                 break;
 542                 /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */
 543         default:
 544                 netdev->max_mtu = ETH_DATA_LEN;
 545                 break;
 546         }
 547 }
 548
 549 /**
 550  * atl1c_change_mtu - Change the Maximum Transfer Unit
 551  * @netdev: network interface device structure
 552  * @new_mtu: new value for maximum frame size
 553  *
 554  * Returns 0 on success, negative on failure
 555  */
 556 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 557 {
 558         struct atl1c_adapter *adapter = netdev_priv(netdev);
 559
 560         /* set MTU */
 561         if (netif_running(netdev)) {
 562                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 563                         msleep(1);
 564                 netdev->mtu = new_mtu;
 565                 adapter->hw.max_frame_size = new_mtu;
 566                 atl1c_set_rxbufsize(adapter, netdev);
 567                 atl1c_down(adapter);
 568                 netdev_update_features(netdev);
 569                 atl1c_up(adapter);
 570                 clear_bit(__AT_RESETTING, &adapter->flags);
 571         }
 572         return 0;
 573 }
 574
 575 /*
 576  *  caller should hold mdio_lock
 577  */
 578 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 579 {
 580         struct atl1c_adapter *adapter = netdev_priv(netdev);
 581         u16 result;
 582
 583         atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
 584         return result;
 585 }
 586
 587 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 588                              int reg_num, int val)
 589 {
 590         struct atl1c_adapter *adapter = netdev_priv(netdev);
 591
 592         atl1c_write_phy_reg(&adapter->hw, reg_num, val);
 593 }
 594
 595 static int atl1c_mii_ioctl(struct net_device *netdev,
 596                            struct ifreq *ifr, int cmd)
 597 {
 598         struct atl1c_adapter *adapter = netdev_priv(netdev);
 599         struct pci_dev *pdev = adapter->pdev;
 600         struct mii_ioctl_data *data = if_mii(ifr);
 601         unsigned long flags;
 602         int retval = 0;
 603
 604         if (!netif_running(netdev))
 605                 return -EINVAL;
 606
 607         spin_lock_irqsave(&adapter->mdio_lock, flags);
 608         switch (cmd) {
 609         case SIOCGMIIPHY:
 610                 data->phy_id = 0;
 611                 break;
 612
 613         case SIOCGMIIREG:
 614                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 615                                     &data->val_out)) {
 616                         retval = -EIO;
 617                         goto out;
 618                 }
 619                 break;
 620
 621         case SIOCSMIIREG:
 622                 if (data->reg_num & ~(0x1F)) {
 623                         retval = -EFAULT;
 624                         goto out;
 625                 }
 626
 627                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 628                                 data->reg_num, data->val_in);
 629                 if (atl1c_write_phy_reg(&adapter->hw,
 630                                      data->reg_num, data->val_in)) {
 631                         retval = -EIO;
 632                         goto out;
 633                 }
 634                 break;
 635
 636         default:
 637                 retval = -EOPNOTSUPP;
 638                 break;
 639         }
 640 out:
 641         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 642         return retval;
 643 }
 644
 645 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 646 {
 647         switch (cmd) {
 648         case SIOCGMIIPHY:
 649         case SIOCGMIIREG:
 650         case SIOCSMIIREG:
 651                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 652         default:
 653                 return -EOPNOTSUPP;
 654         }
 655 }
 656
 657 /**
 658  * atl1c_alloc_queues - Allocate memory for all rings
 659  * @adapter: board private structure to initialize
 660  *
 661  */
 662 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
 663 {
 664         return 0;
 665 }
 666
 667 static enum atl1c_nic_type atl1c_get_mac_type(struct pci_dev *pdev,
 668                                               u8 __iomem *hw_addr)
 669 {
 670         switch (pdev->device) {
 671         case PCI_DEVICE_ID_ATTANSIC_L2C:
 672                 return athr_l2c;
 673         case PCI_DEVICE_ID_ATTANSIC_L1C:
 674                 return athr_l1c;
 675         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 676                 return athr_l2c_b;
 677         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 678                 return athr_l2c_b2;
 679         case PCI_DEVICE_ID_ATHEROS_L1D:
 680                 return athr_l1d;
 681         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 682                 if (readl(hw_addr + REG_MT_MAGIC) == MT_MAGIC)
 683                         return athr_mt;
 684                 return athr_l1d_2;
 685         default:
 686                 return athr_l1c;
 687         }
 688 }
 689
 690 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 691 {
 692         u32 link_ctrl_data;
 693
 694         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 695
 696         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 697                          ATL1C_TXQ_MODE_ENHANCE;
 698         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 699                           ATL1C_ASPM_L1_SUPPORT;
 700         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 701
 702         if (hw->nic_type == athr_l1c ||
 703             hw->nic_type == athr_l1d ||
 704             hw->nic_type == athr_l1d_2)
 705                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 706         return 0;
 707 }
 708
 709 struct atl1c_platform_patch {
 710         u16 pci_did;
 711         u8  pci_revid;
 712         u16 subsystem_vid;
 713         u16 subsystem_did;
 714         u32 patch_flag;
 715 #define ATL1C_LINK_PATCH        0x1
 716 };
 717 static const struct atl1c_platform_patch plats[] = {
 718 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
 719 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
 720 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
 721 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
 722 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
 723 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
 724 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
 725 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
 726 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
 727 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
 728 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
 729 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
 730 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
 731 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
 732 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
 733 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
 734 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
 735 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
 736 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
 737 {0},
 738 };
 739
 740 static void atl1c_patch_assign(struct atl1c_hw *hw)
 741 {
 742         struct pci_dev  *pdev = hw->adapter->pdev;
 743         u32 misc_ctrl;
 744         int i = 0;
 745
 746         hw->msi_lnkpatch = false;
 747
 748         while (plats[i].pci_did != 0) {
 749                 if (plats[i].pci_did == hw->device_id &&
 750                     plats[i].pci_revid == hw->revision_id &&
 751                     plats[i].subsystem_vid == hw->subsystem_vendor_id &&
 752                     plats[i].subsystem_did == hw->subsystem_id) {
 753                         if (plats[i].patch_flag & ATL1C_LINK_PATCH)
 754                                 hw->msi_lnkpatch = true;
 755                 }
 756                 i++;
 757         }
 758
 759         if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
 760             hw->revision_id == L2CB_V21) {
 761                 /* config access mode */
 762                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 763                                        REG_PCIE_DEV_MISC_CTRL);
 764                 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
 765                 misc_ctrl &= ~0x100;
 766                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 767                                        REG_PCIE_DEV_MISC_CTRL);
 768                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
 769         }
 770 }
 771 /**
 772  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 773  * @adapter: board private structure to initialize
 774  *
 775  * atl1c_sw_init initializes the Adapter private data structure.
 776  * Fields are initialized based on PCI device information and
 777  * OS network device settings (MTU size).
 778  */
 779 static int atl1c_sw_init(struct atl1c_adapter *adapter)
 780 {
 781         struct atl1c_hw *hw   = &adapter->hw;
 782         struct pci_dev  *pdev = adapter->pdev;
 783         u32 revision;
 784         int i;
 785
 786         adapter->wol = 0;
 787         device_set_wakeup_enable(&pdev->dev, false);
 788         adapter->link_speed = SPEED_0;
 789         adapter->link_duplex = FULL_DUPLEX;
 790         adapter->tpd_ring[0].count = 1024;
 791         adapter->rfd_ring[0].count = 512;
 792
 793         hw->vendor_id = pdev->vendor;
 794         hw->device_id = pdev->device;
 795         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 796         hw->subsystem_id = pdev->subsystem_device;
 797         pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
 798         hw->revision_id = revision & 0xFF;
 799         /* before link up, we assume hibernate is true */
 800         hw->hibernate = true;
 801         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 802         if (atl1c_setup_mac_funcs(hw) != 0) {
 803                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 804                 return -1;
 805         }
 806         atl1c_patch_assign(hw);
 807
 808         hw->intr_mask = IMR_NORMAL_MASK;
 809         for (i = 0; i < adapter->tx_queue_count; ++i)
 810                 hw->intr_mask |= atl1c_qregs[i].tx_isr;
 811         for (i = 0; i < adapter->rx_queue_count; ++i)
 812                 hw->intr_mask |= atl1c_qregs[i].rx_isr;
 813         hw->phy_configured = false;
 814         hw->preamble_len = 7;
 815         hw->max_frame_size = adapter->netdev->mtu;
 816         hw->autoneg_advertised = ADVERTISED_Autoneg;
 817         hw->indirect_tab = 0xE4E4E4E4;
 818         hw->base_cpu = 0;
 819
 820         hw->ict = 50000;                /* 100ms */
 821         hw->smb_timer = 200000;         /* 400ms */
 822         hw->rx_imt = 200;
 823         hw->tx_imt = 1000;
 824
 825         hw->tpd_burst = 5;
 826         hw->rfd_burst = 8;
 827         hw->dma_order = atl1c_dma_ord_out;
 828         hw->dmar_block = atl1c_dma_req_1024;
 829
 830         if (atl1c_alloc_queues(adapter)) {
 831                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 832                 return -ENOMEM;
 833         }
 834         /* TODO */
 835         atl1c_set_rxbufsize(adapter, adapter->netdev);
 836         atomic_set(&adapter->irq_sem, 1);
 837         spin_lock_init(&adapter->mdio_lock);
 838         spin_lock_init(&adapter->hw.intr_mask_lock);
 839         set_bit(__AT_DOWN, &adapter->flags);
 840
 841         return 0;
 842 }
 843
 844 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 845                                       struct atl1c_buffer *buffer_info,
 846                                       int budget)
 847 {
 848         u16 pci_driection;
 849         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 850                 return;
 851         if (buffer_info->dma) {
 852                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 853                         pci_driection = DMA_FROM_DEVICE;
 854                 else
 855                         pci_driection = DMA_TO_DEVICE;
 856
 857                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 858                         dma_unmap_single(&pdev->dev, buffer_info->dma,
 859                                          buffer_info->length, pci_driection);
 860                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 861                         dma_unmap_page(&pdev->dev, buffer_info->dma,
 862                                        buffer_info->length, pci_driection);
 863         }
 864         if (buffer_info->skb)
 865                 napi_consume_skb(buffer_info->skb, budget);
 866         buffer_info->dma = 0;
 867         buffer_info->skb = NULL;
 868         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 869 }
 870 /**
 871  * atl1c_clean_tx_ring - Free Tx-skb
 872  * @adapter: board private structure
 873  * @queue: idx of transmit queue
 874  */
 875 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 876                                 u32 queue)
 877 {
 878         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
 879         struct atl1c_buffer *buffer_info;
 880         struct pci_dev *pdev = adapter->pdev;
 881         u16 index, ring_count;
 882
 883         ring_count = tpd_ring->count;
 884         for (index = 0; index < ring_count; index++) {
 885                 buffer_info = &tpd_ring->buffer_info[index];
 886                 atl1c_clean_buffer(pdev, buffer_info, 0);
 887         }
 888
 889         netdev_tx_reset_queue(netdev_get_tx_queue(adapter->netdev, queue));
 890
 891         /* Zero out Tx-buffers */
 892         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 893                 ring_count);
 894         atomic_set(&tpd_ring->next_to_clean, 0);
 895         tpd_ring->next_to_use = 0;
 896 }
 897
 898 /**
 899  * atl1c_clean_rx_ring - Free rx-reservation skbs
 900  * @adapter: board private structure
 901  * @queue: idx of transmit queue
 902  */
 903 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter, u32 queue)
 904 {
 905         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue];
 906         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue];
 907         struct atl1c_buffer *buffer_info;
 908         struct pci_dev *pdev = adapter->pdev;
 909         int j;
 910
 911         for (j = 0; j < rfd_ring->count; j++) {
 912                 buffer_info = &rfd_ring->buffer_info[j];
 913                 atl1c_clean_buffer(pdev, buffer_info, 0);
 914         }
 915         /* zero out the descriptor ring */
 916         memset(rfd_ring->desc, 0, rfd_ring->size);
 917         rfd_ring->next_to_clean = 0;
 918         rfd_ring->next_to_use = 0;
 919         rrd_ring->next_to_use = 0;
 920         rrd_ring->next_to_clean = 0;
 921 }
 922
 923 /*
 924  * Read / Write Ptr Initialize:
 925  */
 926 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 927 {
 928         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 929         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 930         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 931         struct atl1c_buffer *buffer_info;
 932         int i, j;
 933
 934         for (i = 0; i < adapter->tx_queue_count; i++) {
 935                 tpd_ring[i].next_to_use = 0;
 936                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 937                 buffer_info = tpd_ring[i].buffer_info;
 938                 for (j = 0; j < tpd_ring->count; j++)
 939                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 940                                                ATL1C_BUFFER_FREE);
 941         }
 942         for (i = 0; i < adapter->rx_queue_count; i++) {
 943                 rfd_ring[i].next_to_use = 0;
 944                 rfd_ring[i].next_to_clean = 0;
 945                 rrd_ring[i].next_to_use = 0;
 946                 rrd_ring[i].next_to_clean = 0;
 947                 for (j = 0; j < rfd_ring[i].count; j++) {
 948                         buffer_info = &rfd_ring[i].buffer_info[j];
 949                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 950                 }
 951         }
 952 }
 953
 954 /**
 955  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 956  * @adapter: board private structure
 957  *
 958  * Free all transmit software resources
 959  */
 960 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 961 {
 962         struct pci_dev *pdev = adapter->pdev;
 963
 964         dma_free_coherent(&pdev->dev, adapter->ring_header.size,
 965                           adapter->ring_header.desc, adapter->ring_header.dma);
 966         adapter->ring_header.desc = NULL;
 967
 968         /* Note: just free tdp_ring.buffer_info,
 969          * it contain rfd_ring.buffer_info, do not double free
 970          */
 971         if (adapter->tpd_ring[0].buffer_info) {
 972                 kfree(adapter->tpd_ring[0].buffer_info);
 973                 adapter->tpd_ring[0].buffer_info = NULL;
 974         }
 975 }
 976
 977 /**
 978  * atl1c_setup_ring_resources - allocate Tx / RX descriptor resources
 979  * @adapter: board private structure
 980  *
 981  * Return 0 on success, negative on failure
 982  */
 983 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 984 {
 985         struct pci_dev *pdev = adapter->pdev;
 986         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 987         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 988         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 989         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 990         int tqc = adapter->tx_queue_count;
 991         int rqc = adapter->rx_queue_count;
 992         int size;
 993         int i;
 994         int count = 0;
 995         u32 offset = 0;
 996
 997         /* Even though only one tpd queue is actually used, the "high"
 998          * priority tpd queue also gets initialized
 999          */
1000         if (tqc == 1)
1001                 tqc = 2;
1002
1003         for (i = 1; i < tqc; i++)
1004                 tpd_ring[i].count = tpd_ring[0].count;
1005
1006         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * tqc +
1007                                               rfd_ring->count * rqc);
1008         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
1009         if (unlikely(!tpd_ring->buffer_info))
1010                 goto err_nomem;
1011
1012         for (i = 0; i < tqc; i++) {
1013                 tpd_ring[i].adapter = adapter;
1014                 tpd_ring[i].num = i;
1015                 tpd_ring[i].buffer_info = (tpd_ring->buffer_info + count);
1016                 count += tpd_ring[i].count;
1017         }
1018
1019         for (i = 0; i < rqc; i++) {
1020                 rrd_ring[i].adapter = adapter;
1021                 rrd_ring[i].num = i;
1022                 rrd_ring[i].count = rfd_ring[0].count;
1023                 rfd_ring[i].count = rfd_ring[0].count;
1024                 rfd_ring[i].buffer_info = (tpd_ring->buffer_info + count);
1025                 count += rfd_ring->count;
1026         }
1027
1028         /*
1029          * real ring DMA buffer
1030          * each ring/block may need up to 8 bytes for alignment, hence the
1031          * additional bytes tacked onto the end.
1032          */
1033         ring_header->size =
1034                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * tqc +
1035                 sizeof(struct atl1c_rx_free_desc) * rfd_ring->count * rqc +
1036                 sizeof(struct atl1c_recv_ret_status) * rfd_ring->count * rqc +
1037                 8 * 4;
1038
1039         ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size,
1040                                                &ring_header->dma, GFP_KERNEL);
1041         if (unlikely(!ring_header->desc)) {
1042                 dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
1043                 goto err_nomem;
1044         }
1045         /* init TPD ring */
1046
1047         tpd_ring[0].dma = roundup(ring_header->dma, 8);
1048         offset = tpd_ring[0].dma - ring_header->dma;
1049         for (i = 0; i < tqc; i++) {
1050                 tpd_ring[i].dma = ring_header->dma + offset;
1051                 tpd_ring[i].desc = (u8 *)ring_header->desc + offset;
1052                 tpd_ring[i].size =
1053                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1054                 offset += roundup(tpd_ring[i].size, 8);
1055         }
1056         for (i = 0; i < rqc; i++) {
1057                 /* init RFD ring */
1058                 rfd_ring[i].dma = ring_header->dma + offset;
1059                 rfd_ring[i].desc = (u8 *)ring_header->desc + offset;
1060                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
1061                         rfd_ring[i].count;
1062                 offset += roundup(rfd_ring[i].size, 8);
1063
1064                 /* init RRD ring */
1065                 rrd_ring[i].dma = ring_header->dma + offset;
1066                 rrd_ring[i].desc = (u8 *)ring_header->desc + offset;
1067                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
1068                         rrd_ring[i].count;
1069                 offset += roundup(rrd_ring[i].size, 8);
1070         }
1071
1072         return 0;
1073
1074 err_nomem:
1075         kfree(tpd_ring->buffer_info);
1076         return -ENOMEM;
1077 }
1078
1079 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1080 {
1081         struct atl1c_hw *hw = &adapter->hw;
1082         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
1083         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
1084         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1085         int i;
1086         int tx_queue_count = adapter->tx_queue_count;
1087
1088         if (tx_queue_count == 1)
1089                 tx_queue_count = 2;
1090
1091         /* TPD */
1092         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1093                      (u32)((tpd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
1094         /* just enable normal priority TX queue */
1095         for (i = 0; i < tx_queue_count; i++) {
1096                 AT_WRITE_REG(hw, atl1c_qregs[i].tpd_addr_lo,
1097                              (u32)(tpd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1098         }
1099         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1100                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1101
1102
1103         /* RFD */
1104         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1105                      (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1106         for (i = 0; i < adapter->rx_queue_count; i++) {
1107                 AT_WRITE_REG(hw, atl1c_qregs[i].rfd_addr_lo,
1108                              (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1109         }
1110
1111         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1112                         rfd_ring->count & RFD_RING_SIZE_MASK);
1113         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1114                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1115
1116         /* RRD */
1117         for (i = 0; i < adapter->rx_queue_count; i++) {
1118                 AT_WRITE_REG(hw, atl1c_qregs[i].rrd_addr_lo,
1119                              (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1120         }
1121         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1122                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1123
1124         if (hw->nic_type == athr_l2c_b) {
1125                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1126                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1127                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1128                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1129                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1130                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1131                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1132                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1133         }
1134         /* Load all of base address above */
1135         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1136 }
1137
1138 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1139 {
1140         struct atl1c_hw *hw = &adapter->hw;
1141         int max_pay_load;
1142         u16 tx_offload_thresh;
1143         u32 txq_ctrl_data;
1144
1145         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1146         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1147                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1148         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1149         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1150         /*
1151          * if BIOS had changed the dam-read-max-length to an invalid value,
1152          * restore it to default value
1153          */
1154         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1155                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1156                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1157         }
1158         txq_ctrl_data =
1159                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1160                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1161
1162         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1163 }
1164
1165 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1166 {
1167         struct atl1c_hw *hw = &adapter->hw;
1168         u32 rxq_ctrl_data;
1169
1170         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1171                         RXQ_RFD_BURST_NUM_SHIFT;
1172
1173         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1174                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1175
1176         /* aspm for gigabit */
1177         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1178                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1179                         ASPM_THRUPUT_LIMIT_100M);
1180
1181         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1182 }
1183
1184 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1185 {
1186         struct atl1c_hw *hw = &adapter->hw;
1187         u32 dma_ctrl_data;
1188
1189         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1190                 DMA_CTRL_RREQ_PRI_DATA |
1191                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1192                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1193                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1194
1195         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1196 }
1197
1198 /*
1199  * Stop the mac, transmit and receive units
1200  * hw - Struct containing variables accessed by shared code
1201  * return : 0  or  idle status (if error)
1202  */
1203 static int atl1c_stop_mac(struct atl1c_hw *hw)
1204 {
1205         u32 data;
1206
1207         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1208         data &= ~RXQ_CTRL_EN;
1209         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1210
1211         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1212         data &= ~TXQ_CTRL_EN;
1213         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1214
1215         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1216
1217         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1218         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1219         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1220
1221         return (int)atl1c_wait_until_idle(hw,
1222                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1223 }
1224
1225 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1226 {
1227         struct atl1c_hw *hw = &adapter->hw;
1228         u32 mac, txq, rxq;
1229
1230         hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX;
1231         hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1232                 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1233
1234         AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1235         AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1236         AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1237
1238         txq |= TXQ_CTRL_EN;
1239         rxq |= RXQ_CTRL_EN;
1240         mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1241                MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1242                MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1243                MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1244                MAC_CTRL_HASH_ALG_CRC32;
1245         if (hw->mac_duplex)
1246                 mac |= MAC_CTRL_DUPLX;
1247         else
1248                 mac &= ~MAC_CTRL_DUPLX;
1249         mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1250         mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1251
1252         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1253         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1254         AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1255 }
1256
1257 /*
1258  * Reset the transmit and receive units; mask and clear all interrupts.
1259  * hw - Struct containing variables accessed by shared code
1260  * return : 0  or  idle status (if error)
1261  */
1262 static int atl1c_reset_mac(struct atl1c_hw *hw)
1263 {
1264         struct atl1c_adapter *adapter = hw->adapter;
1265         struct pci_dev *pdev = adapter->pdev;
1266         u32 ctrl_data = 0;
1267
1268         atl1c_stop_mac(hw);
1269         /*
1270          * Issue Soft Reset to the MAC.  This will reset the chip's
1271          * transmit, receive, DMA.  It will not effect
1272          * the current PCI configuration.  The global reset bit is self-
1273          * clearing, and should clear within a microsecond.
1274          */
1275         AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1276         ctrl_data |= MASTER_CTRL_OOB_DIS;
1277         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1278
1279         AT_WRITE_FLUSH(hw);
1280         msleep(10);
1281         /* Wait at least 10ms for All module to be Idle */
1282
1283         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1284                 dev_err(&pdev->dev,
1285                         "MAC state machine can't be idle since"
1286                         " disabled for 10ms second\n");
1287                 return -1;
1288         }
1289         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1290
1291         /* driver control speed/duplex */
1292         AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1293         AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1294
1295         /* clk switch setting */
1296         AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1297         switch (hw->nic_type) {
1298         case athr_l2c_b:
1299                 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1300                                 SERDES_MAC_CLK_SLOWDOWN);
1301                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1302                 break;
1303         case athr_l2c_b2:
1304         case athr_l1d_2:
1305                 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1306                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1307                 break;
1308         default:
1309                 break;
1310         }
1311
1312         return 0;
1313 }
1314
1315 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1316 {
1317         u16 ctrl_flags = hw->ctrl_flags;
1318
1319         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1320         atl1c_set_aspm(hw, SPEED_0);
1321         hw->ctrl_flags = ctrl_flags;
1322 }
1323
1324 /*
1325  * Set ASPM state.
1326  * Enable/disable L0s/L1 depend on link state.
1327  */
1328 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1329 {
1330         u32 pm_ctrl_data;
1331         u32 link_l1_timer;
1332
1333         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1334         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1335                           PM_CTRL_ASPM_L0S_EN |
1336                           PM_CTRL_MAC_ASPM_CHK);
1337         /* L1 timer */
1338         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1339                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1340                 link_l1_timer =
1341                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1342                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1343                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1344                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1345         } else {
1346                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1347                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1348                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1349                         link_l1_timer = 1;
1350                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1351                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1352         }
1353
1354         /* L0S/L1 enable */
1355         if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1356                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1357         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1358                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1359
1360         /* l2cb & l1d & l2cb2 & l1d2 */
1361         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1362             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1363                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1364                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1365                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1366                                 PM_CTRL_SERDES_PD_EX_L1 |
1367                                 PM_CTRL_CLK_SWH_L1;
1368                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1369                                   PM_CTRL_SERDES_PLL_L1_EN |
1370                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1371                                   PM_CTRL_SA_DLY_EN |
1372                                   PM_CTRL_HOTRST);
1373                 /* disable l0s if link down or l2cb */
1374                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1375                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1376         } else { /* l1c */
1377                 pm_ctrl_data =
1378                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1379                 if (link_speed != SPEED_0) {
1380                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1381                                         PM_CTRL_SERDES_PLL_L1_EN |
1382                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1383                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1384                                           PM_CTRL_CLK_SWH_L1 |
1385                                           PM_CTRL_ASPM_L0S_EN |
1386                                           PM_CTRL_ASPM_L1_EN);
1387                 } else { /* link down */
1388                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1389                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1390                                           PM_CTRL_SERDES_PLL_L1_EN |
1391                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1392                                           PM_CTRL_ASPM_L0S_EN);
1393                 }
1394         }
1395         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1396
1397         return;
1398 }
1399
1400 /**
1401  * atl1c_configure_mac - Configure Transmit&Receive Unit after Reset
1402  * @adapter: board private structure
1403  *
1404  * Configure the Tx /Rx unit of the MAC after a reset.
1405  */
1406 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1407 {
1408         struct atl1c_hw *hw = &adapter->hw;
1409         u32 master_ctrl_data = 0;
1410         u32 intr_modrt_data;
1411         u32 data;
1412
1413         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1414         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1415                               MASTER_CTRL_RX_ITIMER_EN |
1416                               MASTER_CTRL_INT_RDCLR);
1417         /* clear interrupt status */
1418         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1419         /*  Clear any WOL status */
1420         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1421         /* set Interrupt Clear Timer
1422          * HW will enable self to assert interrupt event to system after
1423          * waiting x-time for software to notify it accept interrupt.
1424          */
1425
1426         data = CLK_GATING_EN_ALL;
1427         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1428                 if (hw->nic_type == athr_l2c_b)
1429                         data &= ~CLK_GATING_RXMAC_EN;
1430         } else
1431                 data = 0;
1432         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1433
1434         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1435                 hw->ict & INT_RETRIG_TIMER_MASK);
1436
1437         atl1c_configure_des_ring(adapter);
1438
1439         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1440                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1441                                         IRQ_MODRT_TX_TIMER_SHIFT;
1442                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1443                                         IRQ_MODRT_RX_TIMER_SHIFT;
1444                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1445                 master_ctrl_data |=
1446                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1447         }
1448
1449         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1450                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1451
1452         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1453         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1454
1455         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1456                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1457
1458         /* set MTU */
1459         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1460                         VLAN_HLEN + ETH_FCS_LEN);
1461
1462         atl1c_configure_tx(adapter);
1463         atl1c_configure_rx(adapter);
1464         atl1c_configure_dma(adapter);
1465
1466         return 0;
1467 }
1468
1469 static int atl1c_configure(struct atl1c_adapter *adapter)
1470 {
1471         struct net_device *netdev = adapter->netdev;
1472         int num;
1473         int i;
1474
1475         if (adapter->hw.nic_type == athr_mt) {
1476                 u32 mode;
1477
1478                 AT_READ_REG(&adapter->hw, REG_MT_MODE, &mode);
1479                 if (adapter->rx_queue_count == 4)
1480                         mode |= MT_MODE_4Q;
1481                 else
1482                         mode &= ~MT_MODE_4Q;
1483                 AT_WRITE_REG(&adapter->hw, REG_MT_MODE, mode);
1484         }
1485
1486         atl1c_init_ring_ptrs(adapter);
1487         atl1c_set_multi(netdev);
1488         atl1c_restore_vlan(adapter);
1489
1490         for (i = 0; i < adapter->rx_queue_count; ++i) {
1491                 num = atl1c_alloc_rx_buffer(adapter, i, false);
1492                 if (unlikely(num == 0))
1493                         return -ENOMEM;
1494         }
1495
1496         if (atl1c_configure_mac(adapter))
1497                 return -EIO;
1498
1499         return 0;
1500 }
1501
1502 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1503 {
1504         u16 hw_reg_addr = 0;
1505         unsigned long *stats_item = NULL;
1506         u32 data;
1507
1508         /* update rx status */
1509         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1510         stats_item  = &adapter->hw_stats.rx_ok;
1511         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1512                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1513                 *stats_item += data;
1514                 stats_item++;
1515                 hw_reg_addr += 4;
1516         }
1517 /* update tx status */
1518         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1519         stats_item  = &adapter->hw_stats.tx_ok;
1520         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1521                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1522                 *stats_item += data;
1523                 stats_item++;
1524                 hw_reg_addr += 4;
1525         }
1526 }
1527
1528 /**
1529  * atl1c_get_stats - Get System Network Statistics
1530  * @netdev: network interface device structure
1531  *
1532  * Returns the address of the device statistics structure.
1533  * The statistics are actually updated from the timer callback.
1534  */
1535 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1536 {
1537         struct atl1c_adapter *adapter = netdev_priv(netdev);
1538         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1539         struct net_device_stats *net_stats = &netdev->stats;
1540
1541         atl1c_update_hw_stats(adapter);
1542         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1543         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1544         net_stats->multicast  = hw_stats->rx_mcast;
1545         net_stats->collisions = hw_stats->tx_1_col +
1546                                 hw_stats->tx_2_col +
1547                                 hw_stats->tx_late_col +
1548                                 hw_stats->tx_abort_col;
1549
1550         net_stats->rx_errors  = hw_stats->rx_frag +
1551                                 hw_stats->rx_fcs_err +
1552                                 hw_stats->rx_len_err +
1553                                 hw_stats->rx_sz_ov +
1554                                 hw_stats->rx_rrd_ov +
1555                                 hw_stats->rx_align_err +
1556                                 hw_stats->rx_rxf_ov;
1557
1558         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1559         net_stats->rx_length_errors = hw_stats->rx_len_err;
1560         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1561         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1562         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1563
1564         net_stats->tx_errors = hw_stats->tx_late_col +
1565                                hw_stats->tx_abort_col +
1566                                hw_stats->tx_underrun +
1567                                hw_stats->tx_trunc;
1568
1569         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1570         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1571         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1572
1573         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1574         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1575
1576         return net_stats;
1577 }
1578
1579 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1580 {
1581         u16 phy_data;
1582
1583         spin_lock(&adapter->mdio_lock);
1584         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1585         spin_unlock(&adapter->mdio_lock);
1586 }
1587
1588 static int atl1c_clean_tx(struct napi_struct *napi, int budget)
1589 {
1590         struct atl1c_tpd_ring *tpd_ring =
1591                 container_of(napi, struct atl1c_tpd_ring, napi);
1592         struct atl1c_adapter *adapter = tpd_ring->adapter;
1593         struct netdev_queue *txq =
1594                 netdev_get_tx_queue(napi->dev, tpd_ring->num);
1595         struct atl1c_buffer *buffer_info;
1596         struct pci_dev *pdev = adapter->pdev;
1597         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1598         u16 hw_next_to_clean;
1599         unsigned int total_bytes = 0, total_packets = 0;
1600         unsigned long flags;
1601
1602         AT_READ_REGW(&adapter->hw, atl1c_qregs[tpd_ring->num].tpd_cons,
1603                      &hw_next_to_clean);
1604
1605         while (next_to_clean != hw_next_to_clean) {
1606                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1607                 if (buffer_info->skb) {
1608                         total_bytes += buffer_info->skb->len;
1609                         total_packets++;
1610                 }
1611                 atl1c_clean_buffer(pdev, buffer_info, budget);
1612                 if (++next_to_clean == tpd_ring->count)
1613                         next_to_clean = 0;
1614                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1615         }
1616
1617         netdev_tx_completed_queue(txq, total_packets, total_bytes);
1618
1619         if (netif_tx_queue_stopped(txq) && netif_carrier_ok(adapter->netdev))
1620                 netif_tx_wake_queue(txq);
1621
1622         if (total_packets < budget) {
1623                 napi_complete_done(napi, total_packets);
1624                 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1625                 adapter->hw.intr_mask |= atl1c_qregs[tpd_ring->num].tx_isr;
1626                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1627                 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
1628                 return total_packets;
1629         }
1630         return budget;
1631 }
1632
1633 static void atl1c_intr_rx_tx(struct atl1c_adapter *adapter, u32 status)
1634 {
1635         struct atl1c_hw *hw = &adapter->hw;
1636         u32 intr_mask;
1637         int i;
1638
1639         spin_lock(&hw->intr_mask_lock);
1640         intr_mask = hw->intr_mask;
1641         for (i = 0; i < adapter->rx_queue_count; ++i) {
1642                 if (!(status & atl1c_qregs[i].rx_isr))
1643                         continue;
1644                 if (napi_schedule_prep(&adapter->rrd_ring[i].napi)) {
1645                         intr_mask &= ~atl1c_qregs[i].rx_isr;
1646                         __napi_schedule(&adapter->rrd_ring[i].napi);
1647                 }
1648         }
1649         for (i = 0; i < adapter->tx_queue_count; ++i) {
1650                 if (!(status & atl1c_qregs[i].tx_isr))
1651                         continue;
1652                 if (napi_schedule_prep(&adapter->tpd_ring[i].napi)) {
1653                         intr_mask &= ~atl1c_qregs[i].tx_isr;
1654                         __napi_schedule(&adapter->tpd_ring[i].napi);
1655                 }
1656         }
1657
1658         if (hw->intr_mask != intr_mask) {
1659                 hw->intr_mask = intr_mask;
1660                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1661         }
1662         spin_unlock(&hw->intr_mask_lock);
1663 }
1664
1665 /**
1666  * atl1c_intr - Interrupt Handler
1667  * @irq: interrupt number
1668  * @data: pointer to a network interface device structure
1669  */
1670 static irqreturn_t atl1c_intr(int irq, void *data)
1671 {
1672         struct net_device *netdev  = data;
1673         struct atl1c_adapter *adapter = netdev_priv(netdev);
1674         struct pci_dev *pdev = adapter->pdev;
1675         struct atl1c_hw *hw = &adapter->hw;
1676         int max_ints = AT_MAX_INT_WORK;
1677         int handled = IRQ_NONE;
1678         u32 status;
1679         u32 reg_data;
1680
1681         do {
1682                 AT_READ_REG(hw, REG_ISR, &reg_data);
1683                 status = reg_data & hw->intr_mask;
1684
1685                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1686                         if (max_ints != AT_MAX_INT_WORK)
1687                                 handled = IRQ_HANDLED;
1688                         break;
1689                 }
1690                 /* link event */
1691                 if (status & ISR_GPHY)
1692                         atl1c_clear_phy_int(adapter);
1693                 /* Ack ISR */
1694                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1695                 if (status & (ISR_RX_PKT | ISR_TX_PKT))
1696                         atl1c_intr_rx_tx(adapter, status);
1697
1698                 handled = IRQ_HANDLED;
1699                 /* check if PCIE PHY Link down */
1700                 if (status & ISR_ERROR) {
1701                         if (netif_msg_hw(adapter))
1702                                 dev_err(&pdev->dev,
1703                                         "atl1c hardware error (status = 0x%x)\n",
1704                                         status & ISR_ERROR);
1705                         /* reset MAC */
1706                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1707                         schedule_work(&adapter->common_task);
1708                         return IRQ_HANDLED;
1709                 }
1710
1711                 if (status & ISR_OVER)
1712                         if (netif_msg_intr(adapter))
1713                                 dev_warn(&pdev->dev,
1714                                         "TX/RX overflow (status = 0x%x)\n",
1715                                         status & ISR_OVER);
1716
1717                 /* link event */
1718                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1719                         netdev->stats.tx_carrier_errors++;
1720                         atl1c_link_chg_event(adapter);
1721                         break;
1722                 }
1723
1724         } while (--max_ints > 0);
1725         /* re-enable Interrupt*/
1726         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1727         return handled;
1728 }
1729
1730 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1731                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1732 {
1733         if (adapter->hw.nic_type == athr_mt) {
1734                 if (prrs->word3 & RRS_MT_PROT_ID_TCPUDP)
1735                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1736                 return;
1737         }
1738         /*
1739          * The pid field in RRS in not correct sometimes, so we
1740          * cannot figure out if the packet is fragmented or not,
1741          * so we tell the KERNEL CHECKSUM_NONE
1742          */
1743         skb_checksum_none_assert(skb);
1744 }
1745
1746 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue,
1747                                  bool napi_mode)
1748 {
1749         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue];
1750         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue];
1751         struct pci_dev *pdev = adapter->pdev;
1752         struct atl1c_buffer *buffer_info, *next_info;
1753         struct sk_buff *skb;
1754         void *vir_addr = NULL;
1755         u16 num_alloc = 0;
1756         u16 rfd_next_to_use, next_next;
1757         struct atl1c_rx_free_desc *rfd_desc;
1758         dma_addr_t mapping;
1759
1760         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1761         if (++next_next == rfd_ring->count)
1762                 next_next = 0;
1763         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1764         next_info = &rfd_ring->buffer_info[next_next];
1765
1766         while (next_info->flags & ATL1C_BUFFER_FREE) {
1767                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1768
1769                 /* When DMA RX address is set to something like
1770                  * 0x....fc0, it will be very likely to cause DMA
1771                  * RFD overflow issue.
1772                  *
1773                  * To work around it, we apply rx skb with 64 bytes
1774                  * longer space, and offset the address whenever
1775                  * 0x....fc0 is detected.
1776                  */
1777                 if (likely(napi_mode))
1778                         skb = napi_alloc_skb(&rrd_ring->napi, adapter->rx_buffer_len + 64);
1779                 else
1780                         skb = netdev_alloc_skb(adapter->netdev, adapter->rx_buffer_len + 64);
1781                 if (unlikely(!skb)) {
1782                         if (netif_msg_rx_err(adapter))
1783                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1784                         break;
1785                 }
1786
1787                 if (((unsigned long)skb->data & 0xfff) == 0xfc0)
1788                         skb_reserve(skb, 64);
1789
1790                 /*
1791                  * Make buffer alignment 2 beyond a 16 byte boundary
1792                  * this will result in a 16 byte aligned IP header after
1793                  * the 14 byte MAC header is removed
1794                  */
1795                 vir_addr = skb->data;
1796                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1797                 buffer_info->skb = skb;
1798                 buffer_info->length = adapter->rx_buffer_len;
1799                 mapping = dma_map_single(&pdev->dev, vir_addr,
1800                                          buffer_info->length, DMA_FROM_DEVICE);
1801                 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) {
1802                         dev_kfree_skb(skb);
1803                         buffer_info->skb = NULL;
1804                         buffer_info->length = 0;
1805                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1806                         netif_warn(adapter, rx_err, adapter->netdev, "RX dma_map_single failed");
1807                         break;
1808                 }
1809                 buffer_info->dma = mapping;
1810                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1811                         ATL1C_PCIMAP_FROMDEVICE);
1812                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1813                 rfd_next_to_use = next_next;
1814                 if (++next_next == rfd_ring->count)
1815                         next_next = 0;
1816                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1817                 next_info = &rfd_ring->buffer_info[next_next];
1818                 num_alloc++;
1819         }
1820
1821         if (num_alloc) {
1822                 /* TODO: update mailbox here */
1823                 wmb();
1824                 rfd_ring->next_to_use = rfd_next_to_use;
1825                 AT_WRITE_REG(&adapter->hw, atl1c_qregs[queue].rfd_prod,
1826                              rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1827         }
1828
1829         return num_alloc;
1830 }
1831
1832 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1833                         struct  atl1c_recv_ret_status *rrs, u16 num)
1834 {
1835         u16 i;
1836         /* the relationship between rrd and rfd is one map one */
1837         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1838                                         rrd_ring->next_to_clean)) {
1839                 rrs->word3 &= ~RRS_RXD_UPDATED;
1840                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1841                         rrd_ring->next_to_clean = 0;
1842         }
1843 }
1844
1845 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1846         struct atl1c_recv_ret_status *rrs, u16 num)
1847 {
1848         u16 i;
1849         u16 rfd_index;
1850         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1851
1852         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1853                         RRS_RX_RFD_INDEX_MASK;
1854         for (i = 0; i < num; i++) {
1855                 buffer_info[rfd_index].skb = NULL;
1856                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1857                                         ATL1C_BUFFER_FREE);
1858                 if (++rfd_index == rfd_ring->count)
1859                         rfd_index = 0;
1860         }
1861         rfd_ring->next_to_clean = rfd_index;
1862 }
1863
1864 /**
1865  * atl1c_clean_rx - NAPI Rx polling callback
1866  * @napi: napi info
1867  * @budget: limit of packets to clean
1868  */
1869 static int atl1c_clean_rx(struct napi_struct *napi, int budget)
1870 {
1871         struct atl1c_rrd_ring *rrd_ring =
1872                 container_of(napi, struct atl1c_rrd_ring, napi);
1873         struct atl1c_adapter *adapter = rrd_ring->adapter;
1874         u16 rfd_num, rfd_index;
1875         u16 length;
1876         struct pci_dev *pdev = adapter->pdev;
1877         struct net_device *netdev  = adapter->netdev;
1878         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[rrd_ring->num];
1879         struct sk_buff *skb;
1880         struct atl1c_recv_ret_status *rrs;
1881         struct atl1c_buffer *buffer_info;
1882         int work_done = 0;
1883         unsigned long flags;
1884
1885         /* Keep link state information with original netdev */
1886         if (!netif_carrier_ok(adapter->netdev))
1887                 goto quit_polling;
1888
1889         while (1) {
1890                 if (work_done >= budget)
1891                         break;
1892                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1893                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1894                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1895                                 RRS_RX_RFD_CNT_MASK;
1896                         if (unlikely(rfd_num != 1))
1897                                 /* TODO support mul rfd*/
1898                                 if (netif_msg_rx_err(adapter))
1899                                         dev_warn(&pdev->dev,
1900                                                 "Multi rfd not support yet!\n");
1901                         goto rrs_checked;
1902                 } else {
1903                         break;
1904                 }
1905 rrs_checked:
1906                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1907                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1908                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1909                         if (netif_msg_rx_err(adapter))
1910                                 dev_warn(&pdev->dev,
1911                                          "wrong packet! rrs word3 is %x\n",
1912                                          rrs->word3);
1913                         continue;
1914                 }
1915
1916                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1917                                 RRS_PKT_SIZE_MASK);
1918                 /* Good Receive */
1919                 if (likely(rfd_num == 1)) {
1920                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1921                                         RRS_RX_RFD_INDEX_MASK;
1922                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1923                         dma_unmap_single(&pdev->dev, buffer_info->dma,
1924                                          buffer_info->length, DMA_FROM_DEVICE);
1925                         skb = buffer_info->skb;
1926                 } else {
1927                         /* TODO */
1928                         if (netif_msg_rx_err(adapter))
1929                                 dev_warn(&pdev->dev,
1930                                         "Multi rfd not support yet!\n");
1931                         break;
1932                 }
1933                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1934                 skb_put(skb, length - ETH_FCS_LEN);
1935                 skb->protocol = eth_type_trans(skb, netdev);
1936                 atl1c_rx_checksum(adapter, skb, rrs);
1937                 if (rrs->word3 & RRS_VLAN_INS) {
1938                         u16 vlan;
1939
1940                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1941                         vlan = le16_to_cpu(vlan);
1942                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1943                 }
1944                 napi_gro_receive(napi, skb);
1945
1946                 work_done++;
1947         }
1948         if (work_done)
1949                 atl1c_alloc_rx_buffer(adapter, rrd_ring->num, true);
1950
1951         if (work_done < budget) {
1952 quit_polling:
1953                 napi_complete_done(napi, work_done);
1954                 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1955                 adapter->hw.intr_mask |= atl1c_qregs[rrd_ring->num].rx_isr;
1956                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1957                 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
1958         }
1959         return work_done;
1960 }
1961
1962 #ifdef CONFIG_NET_POLL_CONTROLLER
1963
1964 /*
1965  * Polling 'interrupt' - used by things like netconsole to send skbs
1966  * without having to re-enable interrupts. It's not called while
1967  * the interrupt routine is executing.
1968  */
1969 static void atl1c_netpoll(struct net_device *netdev)
1970 {
1971         struct atl1c_adapter *adapter = netdev_priv(netdev);
1972
1973         disable_irq(adapter->pdev->irq);
1974         atl1c_intr(adapter->pdev->irq, netdev);
1975         enable_irq(adapter->pdev->irq);
1976 }
1977 #endif
1978
1979 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, u32 queue)
1980 {
1981         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
1982         u16 next_to_use = 0;
1983         u16 next_to_clean = 0;
1984
1985         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1986         next_to_use   = tpd_ring->next_to_use;
1987
1988         return (u16)(next_to_clean > next_to_use) ?
1989                 (next_to_clean - next_to_use - 1) :
1990                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1991 }
1992
1993 /*
1994  * get next usable tpd
1995  * Note: should call atl1c_tdp_avail to make sure
1996  * there is enough tpd to use
1997  */
1998 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1999                                             u32 queue)
2000 {
2001         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2002         struct atl1c_tpd_desc *tpd_desc;
2003         u16 next_to_use = 0;
2004
2005         next_to_use = tpd_ring->next_to_use;
2006         if (++tpd_ring->next_to_use == tpd_ring->count)
2007                 tpd_ring->next_to_use = 0;
2008         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
2009         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
2010         return  tpd_desc;
2011 }
2012
2013 static struct atl1c_buffer *
2014 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
2015 {
2016         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
2017
2018         return &tpd_ring->buffer_info[tpd -
2019                         (struct atl1c_tpd_desc *)tpd_ring->desc];
2020 }
2021
2022 /* Calculate the transmit packet descript needed*/
2023 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
2024 {
2025         u16 tpd_req;
2026         u16 proto_hdr_len = 0;
2027
2028         tpd_req = skb_shinfo(skb)->nr_frags + 1;
2029
2030         if (skb_is_gso(skb)) {
2031                 proto_hdr_len = skb_tcp_all_headers(skb);
2032                 if (proto_hdr_len < skb_headlen(skb))
2033                         tpd_req++;
2034                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
2035                         tpd_req++;
2036         }
2037         return tpd_req;
2038 }
2039
2040 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
2041                           struct sk_buff *skb,
2042                           struct atl1c_tpd_desc **tpd,
2043                           u32 queue)
2044 {
2045         struct pci_dev *pdev = adapter->pdev;
2046         unsigned short offload_type;
2047         u8 hdr_len;
2048         u32 real_len;
2049
2050         if (skb_is_gso(skb)) {
2051                 int err;
2052
2053                 err = skb_cow_head(skb, 0);
2054                 if (err < 0)
2055                         return err;
2056
2057                 offload_type = skb_shinfo(skb)->gso_type;
2058
2059                 if (offload_type & SKB_GSO_TCPV4) {
2060                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2061                                         + ntohs(ip_hdr(skb)->tot_len));
2062
2063                         if (real_len < skb->len) {
2064                                 err = pskb_trim(skb, real_len);
2065                                 if (err)
2066                                         return err;
2067                         }
2068
2069                         hdr_len = skb_tcp_all_headers(skb);
2070                         if (unlikely(skb->len == hdr_len)) {
2071                                 /* only xsum need */
2072                                 if (netif_msg_tx_queued(adapter))
2073                                         dev_warn(&pdev->dev,
2074                                                 "IPV4 tso with zero data??\n");
2075                                 goto check_sum;
2076                         } else {
2077                                 ip_hdr(skb)->check = 0;
2078                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2079                                                         ip_hdr(skb)->saddr,
2080                                                         ip_hdr(skb)->daddr,
2081                                                         0, IPPROTO_TCP, 0);
2082                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2083                         }
2084                 }
2085
2086                 if (offload_type & SKB_GSO_TCPV6) {
2087                         struct atl1c_tpd_ext_desc *etpd =
2088                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2089
2090                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2091                         *tpd = atl1c_get_tpd(adapter, queue);
2092                         ipv6_hdr(skb)->payload_len = 0;
2093                         /* check payload == 0 byte ? */
2094                         hdr_len = skb_tcp_all_headers(skb);
2095                         if (unlikely(skb->len == hdr_len)) {
2096                                 /* only xsum need */
2097                                 if (netif_msg_tx_queued(adapter))
2098                                         dev_warn(&pdev->dev,
2099                                                 "IPV6 tso with zero data??\n");
2100                                 goto check_sum;
2101                         } else
2102                                 tcp_v6_gso_csum_prep(skb);
2103
2104                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2105                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2106                         etpd->pkt_len = cpu_to_le32(skb->len);
2107                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2108                 }
2109
2110                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2111                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2112                                 TPD_TCPHDR_OFFSET_SHIFT;
2113                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2114                                 TPD_MSS_SHIFT;
2115                 return 0;
2116         }
2117
2118 check_sum:
2119         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2120                 u8 css, cso;
2121                 cso = skb_checksum_start_offset(skb);
2122
2123                 if (unlikely(cso & 0x1)) {
2124                         if (netif_msg_tx_err(adapter))
2125                                 dev_err(&adapter->pdev->dev,
2126                                         "payload offset should not an event number\n");
2127                         return -1;
2128                 } else {
2129                         css = cso + skb->csum_offset;
2130
2131                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2132                                         TPD_PLOADOFFSET_SHIFT;
2133                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2134                                         TPD_CCSUM_OFFSET_SHIFT;
2135                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2136                 }
2137         }
2138         return 0;
2139 }
2140
2141 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2142                               struct atl1c_tpd_desc *first_tpd,
2143                               u32 queue)
2144 {
2145         struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[queue];
2146         struct atl1c_buffer *buffer_info;
2147         struct atl1c_tpd_desc *tpd;
2148         u16 first_index, index;
2149
2150         first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2151         index = first_index;
2152         while (index != tpd_ring->next_to_use) {
2153                 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2154                 buffer_info = &tpd_ring->buffer_info[index];
2155                 atl1c_clean_buffer(adpt->pdev, buffer_info, 0);
2156                 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2157                 if (++index == tpd_ring->count)
2158                         index = 0;
2159         }
2160         tpd_ring->next_to_use = first_index;
2161 }
2162
2163 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2164                         struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2165                         u32 queue)
2166 {
2167         struct atl1c_tpd_desc *use_tpd = NULL;
2168         struct atl1c_buffer *buffer_info = NULL;
2169         u16 buf_len = skb_headlen(skb);
2170         u16 map_len = 0;
2171         u16 mapped_len = 0;
2172         u16 hdr_len = 0;
2173         u16 nr_frags;
2174         u16 f;
2175         int tso;
2176
2177         nr_frags = skb_shinfo(skb)->nr_frags;
2178         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2179         if (tso) {
2180                 /* TSO */
2181                 hdr_len = skb_tcp_all_headers(skb);
2182                 map_len = hdr_len;
2183                 use_tpd = tpd;
2184
2185                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2186                 buffer_info->length = map_len;
2187                 buffer_info->dma = dma_map_single(&adapter->pdev->dev,
2188                                                   skb->data, hdr_len,
2189                                                   DMA_TO_DEVICE);
2190                 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2191                         goto err_dma;
2192                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2193                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2194                         ATL1C_PCIMAP_TODEVICE);
2195                 mapped_len += map_len;
2196                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2197                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2198         }
2199
2200         if (mapped_len < buf_len) {
2201                 /* mapped_len == 0, means we should use the first tpd,
2202                    which is given by caller  */
2203                 if (mapped_len == 0)
2204                         use_tpd = tpd;
2205                 else {
2206                         use_tpd = atl1c_get_tpd(adapter, queue);
2207                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2208                 }
2209                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2210                 buffer_info->length = buf_len - mapped_len;
2211                 buffer_info->dma =
2212                         dma_map_single(&adapter->pdev->dev,
2213                                        skb->data + mapped_len,
2214                                        buffer_info->length, DMA_TO_DEVICE);
2215                 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2216                         goto err_dma;
2217
2218                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2219                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2220                         ATL1C_PCIMAP_TODEVICE);
2221                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2222                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2223         }
2224
2225         for (f = 0; f < nr_frags; f++) {
2226                 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2227
2228                 use_tpd = atl1c_get_tpd(adapter, queue);
2229                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2230
2231                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2232                 buffer_info->length = skb_frag_size(frag);
2233                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2234                                                     frag, 0,
2235                                                     buffer_info->length,
2236                                                     DMA_TO_DEVICE);
2237                 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2238                         goto err_dma;
2239
2240                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2241                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2242                         ATL1C_PCIMAP_TODEVICE);
2243                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2244                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2245         }
2246
2247         /* The last tpd */
2248         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2249         /* The last buffer info contain the skb address,
2250            so it will be free after unmap */
2251         buffer_info->skb = skb;
2252
2253         return 0;
2254
2255 err_dma:
2256         buffer_info->dma = 0;
2257         buffer_info->length = 0;
2258         return -1;
2259 }
2260
2261 static void atl1c_tx_queue(struct atl1c_adapter *adapter, u32 queue)
2262 {
2263         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2264
2265         AT_WRITE_REGW(&adapter->hw, atl1c_qregs[queue].tpd_prod,
2266                       tpd_ring->next_to_use);
2267 }
2268
2269 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2270                                           struct net_device *netdev)
2271 {
2272         struct atl1c_adapter *adapter = netdev_priv(netdev);
2273         u32 queue = skb_get_queue_mapping(skb);
2274         struct netdev_queue *txq = netdev_get_tx_queue(netdev, queue);
2275         struct atl1c_tpd_desc *tpd;
2276         u16 tpd_req;
2277
2278         if (test_bit(__AT_DOWN, &adapter->flags)) {
2279                 dev_kfree_skb_any(skb);
2280                 return NETDEV_TX_OK;
2281         }
2282
2283         tpd_req = atl1c_cal_tpd_req(skb);
2284
2285         if (atl1c_tpd_avail(adapter, queue) < tpd_req) {
2286                 /* no enough descriptor, just stop queue */
2287                 atl1c_tx_queue(adapter, queue);
2288                 netif_tx_stop_queue(txq);
2289                 return NETDEV_TX_BUSY;
2290         }
2291
2292         tpd = atl1c_get_tpd(adapter, queue);
2293
2294         /* do TSO and check sum */
2295         if (atl1c_tso_csum(adapter, skb, &tpd, queue) != 0) {
2296                 atl1c_tx_queue(adapter, queue);
2297                 dev_kfree_skb_any(skb);
2298                 return NETDEV_TX_OK;
2299         }
2300
2301         if (unlikely(skb_vlan_tag_present(skb))) {
2302                 u16 vlan = skb_vlan_tag_get(skb);
2303                 __le16 tag;
2304
2305                 vlan = cpu_to_le16(vlan);
2306                 AT_VLAN_TO_TAG(vlan, tag);
2307                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2308                 tpd->vlan_tag = tag;
2309         }
2310
2311         if (skb_network_offset(skb) != ETH_HLEN)
2312                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2313
2314         if (atl1c_tx_map(adapter, skb, tpd, queue) < 0) {
2315                 netif_info(adapter, tx_done, adapter->netdev,
2316                            "tx-skb dropped due to dma error\n");
2317                 /* roll back tpd/buffer */
2318                 atl1c_tx_rollback(adapter, tpd, queue);
2319                 dev_kfree_skb_any(skb);
2320         } else {
2321                 bool more = netdev_xmit_more();
2322
2323                 if (__netdev_tx_sent_queue(txq, skb->len, more))
2324                         atl1c_tx_queue(adapter, queue);
2325         }
2326
2327         return NETDEV_TX_OK;
2328 }
2329
2330 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2331 {
2332         struct net_device *netdev = adapter->netdev;
2333
2334         free_irq(adapter->pdev->irq, netdev);
2335
2336         if (adapter->have_msi)
2337                 pci_disable_msi(adapter->pdev);
2338 }
2339
2340 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2341 {
2342         struct pci_dev    *pdev   = adapter->pdev;
2343         struct net_device *netdev = adapter->netdev;
2344         int flags = 0;
2345         int err = 0;
2346
2347         adapter->have_msi = true;
2348         err = pci_enable_msi(adapter->pdev);
2349         if (err) {
2350                 if (netif_msg_ifup(adapter))
2351                         dev_err(&pdev->dev,
2352                                 "Unable to allocate MSI interrupt Error: %d\n",
2353                                 err);
2354                 adapter->have_msi = false;
2355         }
2356
2357         if (!adapter->have_msi)
2358                 flags |= IRQF_SHARED;
2359         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2360                         netdev->name, netdev);
2361         if (err) {
2362                 if (netif_msg_ifup(adapter))
2363                         dev_err(&pdev->dev,
2364                                 "Unable to allocate interrupt Error: %d\n",
2365                                 err);
2366                 if (adapter->have_msi)
2367                         pci_disable_msi(adapter->pdev);
2368                 return err;
2369         }
2370         if (netif_msg_ifup(adapter))
2371                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2372         return err;
2373 }
2374
2375
2376 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2377 {
2378         int i;
2379         /* release tx-pending skbs and reset tx/rx ring index */
2380         for (i = 0; i < adapter->tx_queue_count; ++i)
2381                 atl1c_clean_tx_ring(adapter, i);
2382         for (i = 0; i < adapter->rx_queue_count; ++i)
2383                 atl1c_clean_rx_ring(adapter, i);
2384 }
2385
2386 static int atl1c_up(struct atl1c_adapter *adapter)
2387 {
2388         struct net_device *netdev = adapter->netdev;
2389         int err;
2390         int i;
2391
2392         netif_carrier_off(netdev);
2393
2394         err = atl1c_configure(adapter);
2395         if (unlikely(err))
2396                 goto err_up;
2397
2398         err = atl1c_request_irq(adapter);
2399         if (unlikely(err))
2400                 goto err_up;
2401
2402         atl1c_check_link_status(adapter);
2403         clear_bit(__AT_DOWN, &adapter->flags);
2404         for (i = 0; i < adapter->tx_queue_count; ++i)
2405                 napi_enable(&adapter->tpd_ring[i].napi);
2406         for (i = 0; i < adapter->rx_queue_count; ++i)
2407                 napi_enable(&adapter->rrd_ring[i].napi);
2408         atl1c_irq_enable(adapter);
2409         netif_start_queue(netdev);
2410         return err;
2411
2412 err_up:
2413         for (i = 0; i < adapter->rx_queue_count; ++i)
2414                 atl1c_clean_rx_ring(adapter, i);
2415         return err;
2416 }
2417
2418 static void atl1c_down(struct atl1c_adapter *adapter)
2419 {
2420         struct net_device *netdev = adapter->netdev;
2421         int i;
2422
2423         atl1c_del_timer(adapter);
2424         adapter->work_event = 0; /* clear all event */
2425         /* signal that we're down so the interrupt handler does not
2426          * reschedule our watchdog timer */
2427         set_bit(__AT_DOWN, &adapter->flags);
2428         netif_carrier_off(netdev);
2429         for (i = 0; i < adapter->tx_queue_count; ++i)
2430                 napi_disable(&adapter->tpd_ring[i].napi);
2431         for (i = 0; i < adapter->rx_queue_count; ++i)
2432                 napi_disable(&adapter->rrd_ring[i].napi);
2433         atl1c_irq_disable(adapter);
2434         atl1c_free_irq(adapter);
2435         /* disable ASPM if device inactive */
2436         atl1c_disable_l0s_l1(&adapter->hw);
2437         /* reset MAC to disable all RX/TX */
2438         atl1c_reset_mac(&adapter->hw);
2439         msleep(1);
2440
2441         adapter->link_speed = SPEED_0;
2442         adapter->link_duplex = -1;
2443         atl1c_reset_dma_ring(adapter);
2444 }
2445
2446 /**
2447  * atl1c_open - Called when a network interface is made active
2448  * @netdev: network interface device structure
2449  *
2450  * Returns 0 on success, negative value on failure
2451  *
2452  * The open entry point is called when a network interface is made
2453  * active by the system (IFF_UP).  At this point all resources needed
2454  * for transmit and receive operations are allocated, the interrupt
2455  * handler is registered with the OS, the watchdog timer is started,
2456  * and the stack is notified that the interface is ready.
2457  */
2458 static int atl1c_open(struct net_device *netdev)
2459 {
2460         struct atl1c_adapter *adapter = netdev_priv(netdev);
2461         int err;
2462
2463         /* disallow open during test */
2464         if (test_bit(__AT_TESTING, &adapter->flags))
2465                 return -EBUSY;
2466
2467         /* allocate rx/tx dma buffer & descriptors */
2468         err = atl1c_setup_ring_resources(adapter);
2469         if (unlikely(err))
2470                 return err;
2471
2472         err = atl1c_up(adapter);
2473         if (unlikely(err))
2474                 goto err_up;
2475
2476         return 0;
2477
2478 err_up:
2479         atl1c_free_irq(adapter);
2480         atl1c_free_ring_resources(adapter);
2481         atl1c_reset_mac(&adapter->hw);
2482         return err;
2483 }
2484
2485 /**
2486  * atl1c_close - Disables a network interface
2487  * @netdev: network interface device structure
2488  *
2489  * Returns 0, this is not allowed to fail
2490  *
2491  * The close entry point is called when an interface is de-activated
2492  * by the OS.  The hardware is still under the drivers control, but
2493  * needs to be disabled.  A global MAC reset is issued to stop the
2494  * hardware, and all transmit and receive resources are freed.
2495  */
2496 static int atl1c_close(struct net_device *netdev)
2497 {
2498         struct atl1c_adapter *adapter = netdev_priv(netdev);
2499
2500         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2501         set_bit(__AT_DOWN, &adapter->flags);
2502         cancel_work_sync(&adapter->common_task);
2503         atl1c_down(adapter);
2504         atl1c_free_ring_resources(adapter);
2505         return 0;
2506 }
2507
2508 static int atl1c_suspend(struct device *dev)
2509 {
2510         struct net_device *netdev = dev_get_drvdata(dev);
2511         struct atl1c_adapter *adapter = netdev_priv(netdev);
2512         struct atl1c_hw *hw = &adapter->hw;
2513         u32 wufc = adapter->wol;
2514
2515         atl1c_disable_l0s_l1(hw);
2516         if (netif_running(netdev)) {
2517                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2518                 atl1c_down(adapter);
2519         }
2520         netif_device_detach(netdev);
2521
2522         if (wufc)
2523                 if (atl1c_phy_to_ps_link(hw) != 0)
2524                         dev_dbg(dev, "phy power saving failed");
2525
2526         atl1c_power_saving(hw, wufc);
2527
2528         return 0;
2529 }
2530
2531 #ifdef CONFIG_PM_SLEEP
2532 static int atl1c_resume(struct device *dev)
2533 {
2534         struct net_device *netdev = dev_get_drvdata(dev);
2535         struct atl1c_adapter *adapter = netdev_priv(netdev);
2536
2537         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2538         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2539
2540         atl1c_phy_reset(&adapter->hw);
2541         atl1c_reset_mac(&adapter->hw);
2542         atl1c_phy_init(&adapter->hw);
2543
2544         netif_device_attach(netdev);
2545         if (netif_running(netdev))
2546                 atl1c_up(adapter);
2547
2548         return 0;
2549 }
2550 #endif
2551
2552 static void atl1c_shutdown(struct pci_dev *pdev)
2553 {
2554         struct net_device *netdev = pci_get_drvdata(pdev);
2555         struct atl1c_adapter *adapter = netdev_priv(netdev);
2556
2557         atl1c_suspend(&pdev->dev);
2558         pci_wake_from_d3(pdev, adapter->wol);
2559         pci_set_power_state(pdev, PCI_D3hot);
2560 }
2561
2562 static const struct net_device_ops atl1c_netdev_ops = {
2563         .ndo_open               = atl1c_open,
2564         .ndo_stop               = atl1c_close,
2565         .ndo_validate_addr      = eth_validate_addr,
2566         .ndo_start_xmit         = atl1c_xmit_frame,
2567         .ndo_set_mac_address    = atl1c_set_mac_addr,
2568         .ndo_set_rx_mode        = atl1c_set_multi,
2569         .ndo_change_mtu         = atl1c_change_mtu,
2570         .ndo_fix_features       = atl1c_fix_features,
2571         .ndo_set_features       = atl1c_set_features,
2572         .ndo_eth_ioctl          = atl1c_ioctl,
2573         .ndo_tx_timeout         = atl1c_tx_timeout,
2574         .ndo_get_stats          = atl1c_get_stats,
2575 #ifdef CONFIG_NET_POLL_CONTROLLER
2576         .ndo_poll_controller    = atl1c_netpoll,
2577 #endif
2578 };
2579
2580 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2581 {
2582         SET_NETDEV_DEV(netdev, &pdev->dev);
2583         pci_set_drvdata(pdev, netdev);
2584
2585         netdev->netdev_ops = &atl1c_netdev_ops;
2586         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2587         netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2588         atl1c_set_ethtool_ops(netdev);
2589
2590         /* TODO: add when ready */
2591         netdev->hw_features =   NETIF_F_SG              |
2592                                 NETIF_F_HW_CSUM         |
2593                                 NETIF_F_HW_VLAN_CTAG_RX |
2594                                 NETIF_F_TSO             |
2595                                 NETIF_F_TSO6;
2596         netdev->features =      netdev->hw_features     |
2597                                 NETIF_F_HW_VLAN_CTAG_TX;
2598         return 0;
2599 }
2600
2601 /**
2602  * atl1c_probe - Device Initialization Routine
2603  * @pdev: PCI device information struct
2604  * @ent: entry in atl1c_pci_tbl
2605  *
2606  * Returns 0 on success, negative on failure
2607  *
2608  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2609  * The OS initialization, configuring of the adapter private structure,
2610  * and a hardware reset occur.
2611  */
2612 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2613 {
2614         struct net_device *netdev;
2615         struct atl1c_adapter *adapter;
2616         static int cards_found;
2617         u8 __iomem *hw_addr;
2618         enum atl1c_nic_type nic_type;
2619         u32 queue_count = 1;
2620         int err = 0;
2621         int i;
2622
2623         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2624         err = pci_enable_device_mem(pdev);
2625         if (err)
2626                 return dev_err_probe(&pdev->dev, err, "cannot enable PCI device\n");
2627
2628         /*
2629          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2630          * shared register for the high 32 bits, so only a single, aligned,
2631          * 4 GB physical address range can be used at a time.
2632          *
2633          * Supporting 64-bit DMA on this hardware is more trouble than it's
2634          * worth.  It is far easier to limit to 32-bit DMA than update
2635          * various kernel subsystems to support the mechanics required by a
2636          * fixed-high-32-bit system.
2637          */
2638         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2639         if (err) {
2640                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2641                 goto err_dma;
2642         }
2643
2644         err = pci_request_regions(pdev, atl1c_driver_name);
2645         if (err) {
2646                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2647                 goto err_pci_reg;
2648         }
2649
2650         pci_set_master(pdev);
2651
2652         hw_addr = pci_ioremap_bar(pdev, 0);
2653         if (!hw_addr) {
2654                 err = -EIO;
2655                 dev_err(&pdev->dev, "cannot map device registers\n");
2656                 goto err_ioremap;
2657         }
2658
2659         nic_type = atl1c_get_mac_type(pdev, hw_addr);
2660         if (nic_type == athr_mt)
2661                 queue_count = 4;
2662
2663         netdev = alloc_etherdev_mq(sizeof(struct atl1c_adapter), queue_count);
2664         if (netdev == NULL) {
2665                 err = -ENOMEM;
2666                 goto err_alloc_etherdev;
2667         }
2668
2669         err = atl1c_init_netdev(netdev, pdev);
2670         if (err) {
2671                 dev_err(&pdev->dev, "init netdevice failed\n");
2672                 goto err_init_netdev;
2673         }
2674         adapter = netdev_priv(netdev);
2675         adapter->bd_number = cards_found;
2676         adapter->netdev = netdev;
2677         adapter->pdev = pdev;
2678         adapter->hw.adapter = adapter;
2679         adapter->hw.nic_type = nic_type;
2680         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2681         adapter->hw.hw_addr = hw_addr;
2682         adapter->tx_queue_count = queue_count;
2683         adapter->rx_queue_count = queue_count;
2684
2685         /* init mii data */
2686         adapter->mii.dev = netdev;
2687         adapter->mii.mdio_read  = atl1c_mdio_read;
2688         adapter->mii.mdio_write = atl1c_mdio_write;
2689         adapter->mii.phy_id_mask = 0x1f;
2690         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2691         dev_set_threaded(netdev, true);
2692         for (i = 0; i < adapter->rx_queue_count; ++i)
2693                 netif_napi_add(netdev, &adapter->rrd_ring[i].napi,
2694                                atl1c_clean_rx);
2695         for (i = 0; i < adapter->tx_queue_count; ++i)
2696                 netif_napi_add_tx(netdev, &adapter->tpd_ring[i].napi,
2697                                   atl1c_clean_tx);
2698         timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0);
2699         /* setup the private structure */
2700         err = atl1c_sw_init(adapter);
2701         if (err) {
2702                 dev_err(&pdev->dev, "net device private data init failed\n");
2703                 goto err_sw_init;
2704         }
2705         /* set max MTU */
2706         atl1c_set_max_mtu(netdev);
2707
2708         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2709
2710         /* Init GPHY as early as possible due to power saving issue  */
2711         atl1c_phy_reset(&adapter->hw);
2712
2713         err = atl1c_reset_mac(&adapter->hw);
2714         if (err) {
2715                 err = -EIO;
2716                 goto err_reset;
2717         }
2718
2719         /* reset the controller to
2720          * put the device in a known good starting state */
2721         err = atl1c_phy_init(&adapter->hw);
2722         if (err) {
2723                 err = -EIO;
2724                 goto err_reset;
2725         }
2726         if (atl1c_read_mac_addr(&adapter->hw)) {
2727                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2728                 netdev->addr_assign_type = NET_ADDR_RANDOM;
2729         }
2730         eth_hw_addr_set(netdev, adapter->hw.mac_addr);
2731         if (netif_msg_probe(adapter))
2732                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2733                         adapter->hw.mac_addr);
2734
2735         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2736         INIT_WORK(&adapter->common_task, atl1c_common_task);
2737         adapter->work_event = 0;
2738         err = register_netdev(netdev);
2739         if (err) {
2740                 dev_err(&pdev->dev, "register netdevice failed\n");
2741                 goto err_register;
2742         }
2743
2744         cards_found++;
2745         return 0;
2746
2747 err_reset:
2748 err_register:
2749 err_sw_init:
2750 err_init_netdev:
2751         free_netdev(netdev);
2752 err_alloc_etherdev:
2753         iounmap(hw_addr);
2754 err_ioremap:
2755         pci_release_regions(pdev);
2756 err_pci_reg:
2757 err_dma:
2758         pci_disable_device(pdev);
2759         return err;
2760 }
2761
2762 /**
2763  * atl1c_remove - Device Removal Routine
2764  * @pdev: PCI device information struct
2765  *
2766  * atl1c_remove is called by the PCI subsystem to alert the driver
2767  * that it should release a PCI device.  The could be caused by a
2768  * Hot-Plug event, or because the driver is going to be removed from
2769  * memory.
2770  */
2771 static void atl1c_remove(struct pci_dev *pdev)
2772 {
2773         struct net_device *netdev = pci_get_drvdata(pdev);
2774         struct atl1c_adapter *adapter = netdev_priv(netdev);
2775
2776         unregister_netdev(netdev);
2777         /* restore permanent address */
2778         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2779         atl1c_phy_disable(&adapter->hw);
2780
2781         iounmap(adapter->hw.hw_addr);
2782
2783         pci_release_regions(pdev);
2784         pci_disable_device(pdev);
2785         free_netdev(netdev);
2786 }
2787
2788 /**
2789  * atl1c_io_error_detected - called when PCI error is detected
2790  * @pdev: Pointer to PCI device
2791  * @state: The current pci connection state
2792  *
2793  * This function is called after a PCI bus error affecting
2794  * this device has been detected.
2795  */
2796 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2797                                                 pci_channel_state_t state)
2798 {
2799         struct net_device *netdev = pci_get_drvdata(pdev);
2800         struct atl1c_adapter *adapter = netdev_priv(netdev);
2801
2802         netif_device_detach(netdev);
2803
2804         if (state == pci_channel_io_perm_failure)
2805                 return PCI_ERS_RESULT_DISCONNECT;
2806
2807         if (netif_running(netdev))
2808                 atl1c_down(adapter);
2809
2810         pci_disable_device(pdev);
2811
2812         /* Request a slot reset. */
2813         return PCI_ERS_RESULT_NEED_RESET;
2814 }
2815
2816 /**
2817  * atl1c_io_slot_reset - called after the pci bus has been reset.
2818  * @pdev: Pointer to PCI device
2819  *
2820  * Restart the card from scratch, as if from a cold-boot. Implementation
2821  * resembles the first-half of the e1000_resume routine.
2822  */
2823 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2824 {
2825         struct net_device *netdev = pci_get_drvdata(pdev);
2826         struct atl1c_adapter *adapter = netdev_priv(netdev);
2827
2828         if (pci_enable_device(pdev)) {
2829                 if (netif_msg_hw(adapter))
2830                         dev_err(&pdev->dev,
2831                                 "Cannot re-enable PCI device after reset\n");
2832                 return PCI_ERS_RESULT_DISCONNECT;
2833         }
2834         pci_set_master(pdev);
2835
2836         pci_enable_wake(pdev, PCI_D3hot, 0);
2837         pci_enable_wake(pdev, PCI_D3cold, 0);
2838
2839         atl1c_reset_mac(&adapter->hw);
2840
2841         return PCI_ERS_RESULT_RECOVERED;
2842 }
2843
2844 /**
2845  * atl1c_io_resume - called when traffic can start flowing again.
2846  * @pdev: Pointer to PCI device
2847  *
2848  * This callback is called when the error recovery driver tells us that
2849  * its OK to resume normal operation. Implementation resembles the
2850  * second-half of the atl1c_resume routine.
2851  */
2852 static void atl1c_io_resume(struct pci_dev *pdev)
2853 {
2854         struct net_device *netdev = pci_get_drvdata(pdev);
2855         struct atl1c_adapter *adapter = netdev_priv(netdev);
2856
2857         if (netif_running(netdev)) {
2858                 if (atl1c_up(adapter)) {
2859                         if (netif_msg_hw(adapter))
2860                                 dev_err(&pdev->dev,
2861                                         "Cannot bring device back up after reset\n");
2862                         return;
2863                 }
2864         }
2865
2866         netif_device_attach(netdev);
2867 }
2868
2869 static const struct pci_error_handlers atl1c_err_handler = {
2870         .error_detected = atl1c_io_error_detected,
2871         .slot_reset = atl1c_io_slot_reset,
2872         .resume = atl1c_io_resume,
2873 };
2874
2875 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2876
2877 static struct pci_driver atl1c_driver = {
2878         .name     = atl1c_driver_name,
2879         .id_table = atl1c_pci_tbl,
2880         .probe    = atl1c_probe,
2881         .remove   = atl1c_remove,
2882         .shutdown = atl1c_shutdown,
2883         .err_handler = &atl1c_err_handler,
2884         .driver.pm = &atl1c_pm_ops,
2885 };
2886
2887 module_pci_driver(atl1c_driver);