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_irq_reset - reset interrupt confiure on the NIC
 212  * @adapter: board private structure
 213  */
 214 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 215 {
 216         atomic_set(&adapter->irq_sem, 1);
 217         atl1c_irq_enable(adapter);
 218 }
 219
 220 /*
 221  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 222  * of the idle status register until the device is actually idle
 223  */
 224 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
 225 {
 226         int timeout;
 227         u32 data;
 228
 229         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 230                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 231                 if ((data & modu_ctrl) == 0)
 232                         return 0;
 233                 msleep(1);
 234         }
 235         return data;
 236 }
 237
 238 /**
 239  * atl1c_phy_config - Timer Call-back
 240  * @t: timer list containing pointer to netdev cast into an unsigned long
 241  */
 242 static void atl1c_phy_config(struct timer_list *t)
 243 {
 244         struct atl1c_adapter *adapter = from_timer(adapter, t,
 245                                                    phy_config_timer);
 246         struct atl1c_hw *hw = &adapter->hw;
 247         unsigned long flags;
 248
 249         spin_lock_irqsave(&adapter->mdio_lock, flags);
 250         atl1c_restart_autoneg(hw);
 251         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 252 }
 253
 254 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 255 {
 256         atl1c_down(adapter);
 257         atl1c_up(adapter);
 258         clear_bit(__AT_RESETTING, &adapter->flags);
 259 }
 260
 261 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 262 {
 263         struct atl1c_hw *hw = &adapter->hw;
 264         struct net_device *netdev = adapter->netdev;
 265         struct pci_dev    *pdev   = adapter->pdev;
 266         int err;
 267         unsigned long flags;
 268         u16 speed, duplex;
 269         bool link;
 270
 271         spin_lock_irqsave(&adapter->mdio_lock, flags);
 272         link = atl1c_get_link_status(hw);
 273         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 274
 275         if (!link) {
 276                 /* link down */
 277                 netif_carrier_off(netdev);
 278                 hw->hibernate = true;
 279                 if (atl1c_reset_mac(hw) != 0)
 280                         if (netif_msg_hw(adapter))
 281                                 dev_warn(&pdev->dev, "reset mac failed\n");
 282                 atl1c_set_aspm(hw, SPEED_0);
 283                 atl1c_post_phy_linkchg(hw, SPEED_0);
 284                 atl1c_reset_dma_ring(adapter);
 285                 atl1c_configure(adapter);
 286         } else {
 287                 /* Link Up */
 288                 hw->hibernate = false;
 289                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 290                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 291                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 292                 if (unlikely(err))
 293                         return;
 294                 /* link result is our setting */
 295                 if (adapter->link_speed != speed ||
 296                     adapter->link_duplex != duplex) {
 297                         adapter->link_speed  = speed;
 298                         adapter->link_duplex = duplex;
 299                         atl1c_set_aspm(hw, speed);
 300                         atl1c_post_phy_linkchg(hw, speed);
 301                         atl1c_start_mac(adapter);
 302                         if (netif_msg_link(adapter))
 303                                 dev_info(&pdev->dev,
 304                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 305                                         atl1c_driver_name, netdev->name,
 306                                         adapter->link_speed,
 307                                         adapter->link_duplex == FULL_DUPLEX ?
 308                                         "Full Duplex" : "Half Duplex");
 309                 }
 310                 if (!netif_carrier_ok(netdev))
 311                         netif_carrier_on(netdev);
 312         }
 313 }
 314
 315 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 316 {
 317         struct net_device *netdev = adapter->netdev;
 318         struct pci_dev    *pdev   = adapter->pdev;
 319         bool link;
 320
 321         spin_lock(&adapter->mdio_lock);
 322         link = atl1c_get_link_status(&adapter->hw);
 323         spin_unlock(&adapter->mdio_lock);
 324         /* notify upper layer link down ASAP */
 325         if (!link) {
 326                 if (netif_carrier_ok(netdev)) {
 327                         /* old link state: Up */
 328                         netif_carrier_off(netdev);
 329                         if (netif_msg_link(adapter))
 330                                 dev_info(&pdev->dev,
 331                                         "%s: %s NIC Link is Down\n",
 332                                         atl1c_driver_name, netdev->name);
 333                         adapter->link_speed = SPEED_0;
 334                 }
 335         }
 336
 337         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 338         schedule_work(&adapter->common_task);
 339 }
 340
 341 static void atl1c_common_task(struct work_struct *work)
 342 {
 343         struct atl1c_adapter *adapter;
 344         struct net_device *netdev;
 345
 346         adapter = container_of(work, struct atl1c_adapter, common_task);
 347         netdev = adapter->netdev;
 348
 349         if (test_bit(__AT_DOWN, &adapter->flags))
 350                 return;
 351
 352         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 353                 netif_device_detach(netdev);
 354                 atl1c_down(adapter);
 355                 atl1c_up(adapter);
 356                 netif_device_attach(netdev);
 357         }
 358
 359         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 360                 &adapter->work_event)) {
 361                 atl1c_irq_disable(adapter);
 362                 atl1c_check_link_status(adapter);
 363                 atl1c_irq_enable(adapter);
 364         }
 365 }
 366
 367
 368 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 369 {
 370         del_timer_sync(&adapter->phy_config_timer);
 371 }
 372
 373
 374 /**
 375  * atl1c_tx_timeout - Respond to a Tx Hang
 376  * @netdev: network interface device structure
 377  * @txqueue: index of hanging tx queue
 378  */
 379 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 380 {
 381         struct atl1c_adapter *adapter = netdev_priv(netdev);
 382
 383         /* Do the reset outside of interrupt context */
 384         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 385         schedule_work(&adapter->common_task);
 386 }
 387
 388 /**
 389  * atl1c_set_multi - Multicast and Promiscuous mode set
 390  * @netdev: network interface device structure
 391  *
 392  * The set_multi entry point is called whenever the multicast address
 393  * list or the network interface flags are updated.  This routine is
 394  * responsible for configuring the hardware for proper multicast,
 395  * promiscuous mode, and all-multi behavior.
 396  */
 397 static void atl1c_set_multi(struct net_device *netdev)
 398 {
 399         struct atl1c_adapter *adapter = netdev_priv(netdev);
 400         struct atl1c_hw *hw = &adapter->hw;
 401         struct netdev_hw_addr *ha;
 402         u32 mac_ctrl_data;
 403         u32 hash_value;
 404
 405         /* Check for Promiscuous and All Multicast modes */
 406         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 407
 408         if (netdev->flags & IFF_PROMISC) {
 409                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 410         } else if (netdev->flags & IFF_ALLMULTI) {
 411                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 412                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 413         } else {
 414                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 415         }
 416
 417         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 418
 419         /* clear the old settings from the multicast hash table */
 420         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 421         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 422
 423         /* comoute mc addresses' hash value ,and put it into hash table */
 424         netdev_for_each_mc_addr(ha, netdev) {
 425                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 426                 atl1c_hash_set(hw, hash_value);
 427         }
 428 }
 429
 430 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 431 {
 432         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 433                 /* enable VLAN tag insert/strip */
 434                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 435         } else {
 436                 /* disable VLAN tag insert/strip */
 437                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 438         }
 439 }
 440
 441 static void atl1c_vlan_mode(struct net_device *netdev,
 442         netdev_features_t features)
 443 {
 444         struct atl1c_adapter *adapter = netdev_priv(netdev);
 445         struct pci_dev *pdev = adapter->pdev;
 446         u32 mac_ctrl_data = 0;
 447
 448         if (netif_msg_pktdata(adapter))
 449                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 450
 451         atl1c_irq_disable(adapter);
 452         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 453         __atl1c_vlan_mode(features, &mac_ctrl_data);
 454         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 455         atl1c_irq_enable(adapter);
 456 }
 457
 458 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 459 {
 460         struct pci_dev *pdev = adapter->pdev;
 461
 462         if (netif_msg_pktdata(adapter))
 463                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 464         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 465 }
 466
 467 /**
 468  * atl1c_set_mac_addr - Change the Ethernet Address of the NIC
 469  * @netdev: network interface device structure
 470  * @p: pointer to an address structure
 471  *
 472  * Returns 0 on success, negative on failure
 473  */
 474 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 475 {
 476         struct atl1c_adapter *adapter = netdev_priv(netdev);
 477         struct sockaddr *addr = p;
 478
 479         if (!is_valid_ether_addr(addr->sa_data))
 480                 return -EADDRNOTAVAIL;
 481
 482         if (netif_running(netdev))
 483                 return -EBUSY;
 484
 485         eth_hw_addr_set(netdev, addr->sa_data);
 486         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 487
 488         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
 489
 490         return 0;
 491 }
 492
 493 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 494                                 struct net_device *dev)
 495 {
 496         unsigned int head_size;
 497         int mtu = dev->mtu;
 498
 499         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 500                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 501
 502         head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD + NET_IP_ALIGN) +
 503                     SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 504         adapter->rx_frag_size = roundup_pow_of_two(head_size);
 505 }
 506
 507 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 508         netdev_features_t features)
 509 {
 510         struct atl1c_adapter *adapter = netdev_priv(netdev);
 511         struct atl1c_hw *hw = &adapter->hw;
 512
 513         /*
 514          * Since there is no support for separate rx/tx vlan accel
 515          * enable/disable make sure tx flag is always in same state as rx.
 516          */
 517         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 518                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 519         else
 520                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 521
 522         if (hw->nic_type != athr_mt) {
 523                 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 524                         features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 525         }
 526
 527         return features;
 528 }
 529
 530 static int atl1c_set_features(struct net_device *netdev,
 531         netdev_features_t features)
 532 {
 533         netdev_features_t changed = netdev->features ^ features;
 534
 535         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 536                 atl1c_vlan_mode(netdev, features);
 537
 538         return 0;
 539 }
 540
 541 static void atl1c_set_max_mtu(struct net_device *netdev)
 542 {
 543         struct atl1c_adapter *adapter = netdev_priv(netdev);
 544         struct atl1c_hw *hw = &adapter->hw;
 545
 546         switch (hw->nic_type) {
 547         /* These (GbE) devices support jumbo packets, max_mtu 6122 */
 548         case athr_l1c:
 549         case athr_l1d:
 550         case athr_l1d_2:
 551                 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
 552                         (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
 553                 break;
 554         case athr_mt:
 555                 netdev->max_mtu = 9500;
 556                 break;
 557                 /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */
 558         default:
 559                 netdev->max_mtu = ETH_DATA_LEN;
 560                 break;
 561         }
 562 }
 563
 564 /**
 565  * atl1c_change_mtu - Change the Maximum Transfer Unit
 566  * @netdev: network interface device structure
 567  * @new_mtu: new value for maximum frame size
 568  *
 569  * Returns 0 on success, negative on failure
 570  */
 571 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 572 {
 573         struct atl1c_adapter *adapter = netdev_priv(netdev);
 574
 575         /* set MTU */
 576         if (netif_running(netdev)) {
 577                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 578                         msleep(1);
 579                 netdev->mtu = new_mtu;
 580                 adapter->hw.max_frame_size = new_mtu;
 581                 atl1c_set_rxbufsize(adapter, netdev);
 582                 atl1c_down(adapter);
 583                 netdev_update_features(netdev);
 584                 atl1c_up(adapter);
 585                 clear_bit(__AT_RESETTING, &adapter->flags);
 586         }
 587         return 0;
 588 }
 589
 590 /*
 591  *  caller should hold mdio_lock
 592  */
 593 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 594 {
 595         struct atl1c_adapter *adapter = netdev_priv(netdev);
 596         u16 result;
 597
 598         atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
 599         return result;
 600 }
 601
 602 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 603                              int reg_num, int val)
 604 {
 605         struct atl1c_adapter *adapter = netdev_priv(netdev);
 606
 607         atl1c_write_phy_reg(&adapter->hw, reg_num, val);
 608 }
 609
 610 static int atl1c_mii_ioctl(struct net_device *netdev,
 611                            struct ifreq *ifr, int cmd)
 612 {
 613         struct atl1c_adapter *adapter = netdev_priv(netdev);
 614         struct pci_dev *pdev = adapter->pdev;
 615         struct mii_ioctl_data *data = if_mii(ifr);
 616         unsigned long flags;
 617         int retval = 0;
 618
 619         if (!netif_running(netdev))
 620                 return -EINVAL;
 621
 622         spin_lock_irqsave(&adapter->mdio_lock, flags);
 623         switch (cmd) {
 624         case SIOCGMIIPHY:
 625                 data->phy_id = 0;
 626                 break;
 627
 628         case SIOCGMIIREG:
 629                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 630                                     &data->val_out)) {
 631                         retval = -EIO;
 632                         goto out;
 633                 }
 634                 break;
 635
 636         case SIOCSMIIREG:
 637                 if (data->reg_num & ~(0x1F)) {
 638                         retval = -EFAULT;
 639                         goto out;
 640                 }
 641
 642                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 643                                 data->reg_num, data->val_in);
 644                 if (atl1c_write_phy_reg(&adapter->hw,
 645                                      data->reg_num, data->val_in)) {
 646                         retval = -EIO;
 647                         goto out;
 648                 }
 649                 break;
 650
 651         default:
 652                 retval = -EOPNOTSUPP;
 653                 break;
 654         }
 655 out:
 656         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 657         return retval;
 658 }
 659
 660 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 661 {
 662         switch (cmd) {
 663         case SIOCGMIIPHY:
 664         case SIOCGMIIREG:
 665         case SIOCSMIIREG:
 666                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 667         default:
 668                 return -EOPNOTSUPP;
 669         }
 670 }
 671
 672 /**
 673  * atl1c_alloc_queues - Allocate memory for all rings
 674  * @adapter: board private structure to initialize
 675  *
 676  */
 677 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
 678 {
 679         return 0;
 680 }
 681
 682 static enum atl1c_nic_type atl1c_get_mac_type(struct pci_dev *pdev,
 683                                               u8 __iomem *hw_addr)
 684 {
 685         switch (pdev->device) {
 686         case PCI_DEVICE_ID_ATTANSIC_L2C:
 687                 return athr_l2c;
 688         case PCI_DEVICE_ID_ATTANSIC_L1C:
 689                 return athr_l1c;
 690         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 691                 return athr_l2c_b;
 692         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 693                 return athr_l2c_b2;
 694         case PCI_DEVICE_ID_ATHEROS_L1D:
 695                 return athr_l1d;
 696         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 697                 if (readl(hw_addr + REG_MT_MAGIC) == MT_MAGIC)
 698                         return athr_mt;
 699                 return athr_l1d_2;
 700         default:
 701                 return athr_l1c;
 702         }
 703 }
 704
 705 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 706 {
 707         u32 link_ctrl_data;
 708
 709         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 710
 711         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 712                          ATL1C_TXQ_MODE_ENHANCE;
 713         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 714                           ATL1C_ASPM_L1_SUPPORT;
 715         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 716
 717         if (hw->nic_type == athr_l1c ||
 718             hw->nic_type == athr_l1d ||
 719             hw->nic_type == athr_l1d_2)
 720                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 721         return 0;
 722 }
 723
 724 struct atl1c_platform_patch {
 725         u16 pci_did;
 726         u8  pci_revid;
 727         u16 subsystem_vid;
 728         u16 subsystem_did;
 729         u32 patch_flag;
 730 #define ATL1C_LINK_PATCH        0x1
 731 };
 732 static const struct atl1c_platform_patch plats[] = {
 733 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
 734 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
 735 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
 736 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
 737 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
 738 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
 739 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
 740 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
 741 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
 742 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
 743 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
 744 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
 745 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
 746 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
 747 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
 748 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
 749 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
 750 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
 751 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
 752 {0},
 753 };
 754
 755 static void atl1c_patch_assign(struct atl1c_hw *hw)
 756 {
 757         struct pci_dev  *pdev = hw->adapter->pdev;
 758         u32 misc_ctrl;
 759         int i = 0;
 760
 761         hw->msi_lnkpatch = false;
 762
 763         while (plats[i].pci_did != 0) {
 764                 if (plats[i].pci_did == hw->device_id &&
 765                     plats[i].pci_revid == hw->revision_id &&
 766                     plats[i].subsystem_vid == hw->subsystem_vendor_id &&
 767                     plats[i].subsystem_did == hw->subsystem_id) {
 768                         if (plats[i].patch_flag & ATL1C_LINK_PATCH)
 769                                 hw->msi_lnkpatch = true;
 770                 }
 771                 i++;
 772         }
 773
 774         if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
 775             hw->revision_id == L2CB_V21) {
 776                 /* config access mode */
 777                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 778                                        REG_PCIE_DEV_MISC_CTRL);
 779                 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
 780                 misc_ctrl &= ~0x100;
 781                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 782                                        REG_PCIE_DEV_MISC_CTRL);
 783                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
 784         }
 785 }
 786 /**
 787  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 788  * @adapter: board private structure to initialize
 789  *
 790  * atl1c_sw_init initializes the Adapter private data structure.
 791  * Fields are initialized based on PCI device information and
 792  * OS network device settings (MTU size).
 793  */
 794 static int atl1c_sw_init(struct atl1c_adapter *adapter)
 795 {
 796         struct atl1c_hw *hw   = &adapter->hw;
 797         struct pci_dev  *pdev = adapter->pdev;
 798         u32 revision;
 799         int i;
 800
 801         adapter->wol = 0;
 802         device_set_wakeup_enable(&pdev->dev, false);
 803         adapter->link_speed = SPEED_0;
 804         adapter->link_duplex = FULL_DUPLEX;
 805         adapter->tpd_ring[0].count = 1024;
 806         adapter->rfd_ring[0].count = 512;
 807
 808         hw->vendor_id = pdev->vendor;
 809         hw->device_id = pdev->device;
 810         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 811         hw->subsystem_id = pdev->subsystem_device;
 812         pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
 813         hw->revision_id = revision & 0xFF;
 814         /* before link up, we assume hibernate is true */
 815         hw->hibernate = true;
 816         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 817         if (atl1c_setup_mac_funcs(hw) != 0) {
 818                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 819                 return -1;
 820         }
 821         atl1c_patch_assign(hw);
 822
 823         hw->intr_mask = IMR_NORMAL_MASK;
 824         for (i = 0; i < adapter->tx_queue_count; ++i)
 825                 hw->intr_mask |= atl1c_qregs[i].tx_isr;
 826         for (i = 0; i < adapter->rx_queue_count; ++i)
 827                 hw->intr_mask |= atl1c_qregs[i].rx_isr;
 828         hw->phy_configured = false;
 829         hw->preamble_len = 7;
 830         hw->max_frame_size = adapter->netdev->mtu;
 831         hw->autoneg_advertised = ADVERTISED_Autoneg;
 832         hw->indirect_tab = 0xE4E4E4E4;
 833         hw->base_cpu = 0;
 834
 835         hw->ict = 50000;                /* 100ms */
 836         hw->smb_timer = 200000;         /* 400ms */
 837         hw->rx_imt = 200;
 838         hw->tx_imt = 1000;
 839
 840         hw->tpd_burst = 5;
 841         hw->rfd_burst = 8;
 842         hw->dma_order = atl1c_dma_ord_out;
 843         hw->dmar_block = atl1c_dma_req_1024;
 844
 845         if (atl1c_alloc_queues(adapter)) {
 846                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 847                 return -ENOMEM;
 848         }
 849         /* TODO */
 850         atl1c_set_rxbufsize(adapter, adapter->netdev);
 851         atomic_set(&adapter->irq_sem, 1);
 852         spin_lock_init(&adapter->mdio_lock);
 853         spin_lock_init(&adapter->hw.intr_mask_lock);
 854         set_bit(__AT_DOWN, &adapter->flags);
 855
 856         return 0;
 857 }
 858
 859 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 860                                 struct atl1c_buffer *buffer_info)
 861 {
 862         u16 pci_driection;
 863         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 864                 return;
 865         if (buffer_info->dma) {
 866                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 867                         pci_driection = DMA_FROM_DEVICE;
 868                 else
 869                         pci_driection = DMA_TO_DEVICE;
 870
 871                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 872                         dma_unmap_single(&pdev->dev, buffer_info->dma,
 873                                          buffer_info->length, pci_driection);
 874                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 875                         dma_unmap_page(&pdev->dev, buffer_info->dma,
 876                                        buffer_info->length, pci_driection);
 877         }
 878         if (buffer_info->skb)
 879                 dev_consume_skb_any(buffer_info->skb);
 880         buffer_info->dma = 0;
 881         buffer_info->skb = NULL;
 882         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 883 }
 884 /**
 885  * atl1c_clean_tx_ring - Free Tx-skb
 886  * @adapter: board private structure
 887  * @queue: idx of transmit queue
 888  */
 889 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 890                                 u32 queue)
 891 {
 892         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
 893         struct atl1c_buffer *buffer_info;
 894         struct pci_dev *pdev = adapter->pdev;
 895         u16 index, ring_count;
 896
 897         ring_count = tpd_ring->count;
 898         for (index = 0; index < ring_count; index++) {
 899                 buffer_info = &tpd_ring->buffer_info[index];
 900                 atl1c_clean_buffer(pdev, buffer_info);
 901         }
 902
 903         netdev_tx_reset_queue(netdev_get_tx_queue(adapter->netdev, queue));
 904
 905         /* Zero out Tx-buffers */
 906         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 907                 ring_count);
 908         atomic_set(&tpd_ring->next_to_clean, 0);
 909         tpd_ring->next_to_use = 0;
 910 }
 911
 912 /**
 913  * atl1c_clean_rx_ring - Free rx-reservation skbs
 914  * @adapter: board private structure
 915  * @queue: idx of transmit queue
 916  */
 917 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter, u32 queue)
 918 {
 919         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue];
 920         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue];
 921         struct atl1c_buffer *buffer_info;
 922         struct pci_dev *pdev = adapter->pdev;
 923         int j;
 924
 925         for (j = 0; j < rfd_ring->count; j++) {
 926                 buffer_info = &rfd_ring->buffer_info[j];
 927                 atl1c_clean_buffer(pdev, buffer_info);
 928         }
 929         /* zero out the descriptor ring */
 930         memset(rfd_ring->desc, 0, rfd_ring->size);
 931         rfd_ring->next_to_clean = 0;
 932         rfd_ring->next_to_use = 0;
 933         rrd_ring->next_to_use = 0;
 934         rrd_ring->next_to_clean = 0;
 935 }
 936
 937 /*
 938  * Read / Write Ptr Initialize:
 939  */
 940 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 941 {
 942         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 943         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 944         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 945         struct atl1c_buffer *buffer_info;
 946         int i, j;
 947
 948         for (i = 0; i < adapter->tx_queue_count; i++) {
 949                 tpd_ring[i].next_to_use = 0;
 950                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 951                 buffer_info = tpd_ring[i].buffer_info;
 952                 for (j = 0; j < tpd_ring->count; j++)
 953                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 954                                                ATL1C_BUFFER_FREE);
 955         }
 956         for (i = 0; i < adapter->rx_queue_count; i++) {
 957                 rfd_ring[i].next_to_use = 0;
 958                 rfd_ring[i].next_to_clean = 0;
 959                 rrd_ring[i].next_to_use = 0;
 960                 rrd_ring[i].next_to_clean = 0;
 961                 for (j = 0; j < rfd_ring[i].count; j++) {
 962                         buffer_info = &rfd_ring[i].buffer_info[j];
 963                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 964                 }
 965         }
 966 }
 967
 968 /**
 969  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 970  * @adapter: board private structure
 971  *
 972  * Free all transmit software resources
 973  */
 974 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 975 {
 976         struct pci_dev *pdev = adapter->pdev;
 977         int i;
 978
 979         dma_free_coherent(&pdev->dev, adapter->ring_header.size,
 980                           adapter->ring_header.desc, adapter->ring_header.dma);
 981         adapter->ring_header.desc = NULL;
 982
 983         /* Note: just free tdp_ring.buffer_info,
 984          * it contain rfd_ring.buffer_info, do not double free
 985          */
 986         if (adapter->tpd_ring[0].buffer_info) {
 987                 kfree(adapter->tpd_ring[0].buffer_info);
 988                 adapter->tpd_ring[0].buffer_info = NULL;
 989         }
 990         for (i = 0; i < adapter->rx_queue_count; ++i) {
 991                 if (adapter->rrd_ring[i].rx_page) {
 992                         put_page(adapter->rrd_ring[i].rx_page);
 993                         adapter->rrd_ring[i].rx_page = NULL;
 994                 }
 995         }
 996 }
 997
 998 /**
 999  * atl1c_setup_ring_resources - allocate Tx / RX descriptor resources
1000  * @adapter: board private structure
1001  *
1002  * Return 0 on success, negative on failure
1003  */
1004 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
1005 {
1006         struct pci_dev *pdev = adapter->pdev;
1007         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1008         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
1009         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
1010         struct atl1c_ring_header *ring_header = &adapter->ring_header;
1011         int tqc = adapter->tx_queue_count;
1012         int rqc = adapter->rx_queue_count;
1013         int size;
1014         int i;
1015         int count = 0;
1016         u32 offset = 0;
1017
1018         /* Even though only one tpd queue is actually used, the "high"
1019          * priority tpd queue also gets initialized
1020          */
1021         if (tqc == 1)
1022                 tqc = 2;
1023
1024         for (i = 1; i < tqc; i++)
1025                 tpd_ring[i].count = tpd_ring[0].count;
1026
1027         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * tqc +
1028                                               rfd_ring->count * rqc);
1029         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
1030         if (unlikely(!tpd_ring->buffer_info))
1031                 goto err_nomem;
1032
1033         for (i = 0; i < tqc; i++) {
1034                 tpd_ring[i].adapter = adapter;
1035                 tpd_ring[i].num = i;
1036                 tpd_ring[i].buffer_info = (tpd_ring->buffer_info + count);
1037                 count += tpd_ring[i].count;
1038         }
1039
1040         for (i = 0; i < rqc; i++) {
1041                 rrd_ring[i].adapter = adapter;
1042                 rrd_ring[i].num = i;
1043                 rrd_ring[i].count = rfd_ring[0].count;
1044                 rfd_ring[i].count = rfd_ring[0].count;
1045                 rfd_ring[i].buffer_info = (tpd_ring->buffer_info + count);
1046                 count += rfd_ring->count;
1047         }
1048
1049         /*
1050          * real ring DMA buffer
1051          * each ring/block may need up to 8 bytes for alignment, hence the
1052          * additional bytes tacked onto the end.
1053          */
1054         ring_header->size =
1055                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * tqc +
1056                 sizeof(struct atl1c_rx_free_desc) * rfd_ring->count * rqc +
1057                 sizeof(struct atl1c_recv_ret_status) * rfd_ring->count * rqc +
1058                 8 * 4;
1059
1060         ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size,
1061                                                &ring_header->dma, GFP_KERNEL);
1062         if (unlikely(!ring_header->desc)) {
1063                 dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
1064                 goto err_nomem;
1065         }
1066         /* init TPD ring */
1067
1068         tpd_ring[0].dma = roundup(ring_header->dma, 8);
1069         offset = tpd_ring[0].dma - ring_header->dma;
1070         for (i = 0; i < tqc; i++) {
1071                 tpd_ring[i].dma = ring_header->dma + offset;
1072                 tpd_ring[i].desc = (u8 *)ring_header->desc + offset;
1073                 tpd_ring[i].size =
1074                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1075                 offset += roundup(tpd_ring[i].size, 8);
1076         }
1077         for (i = 0; i < rqc; i++) {
1078                 /* init RFD ring */
1079                 rfd_ring[i].dma = ring_header->dma + offset;
1080                 rfd_ring[i].desc = (u8 *)ring_header->desc + offset;
1081                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
1082                         rfd_ring[i].count;
1083                 offset += roundup(rfd_ring[i].size, 8);
1084
1085                 /* init RRD ring */
1086                 rrd_ring[i].dma = ring_header->dma + offset;
1087                 rrd_ring[i].desc = (u8 *)ring_header->desc + offset;
1088                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
1089                         rrd_ring[i].count;
1090                 offset += roundup(rrd_ring[i].size, 8);
1091         }
1092
1093         return 0;
1094
1095 err_nomem:
1096         kfree(tpd_ring->buffer_info);
1097         return -ENOMEM;
1098 }
1099
1100 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1101 {
1102         struct atl1c_hw *hw = &adapter->hw;
1103         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
1104         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
1105         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1106         int i;
1107         int tx_queue_count = adapter->tx_queue_count;
1108
1109         if (tx_queue_count == 1)
1110                 tx_queue_count = 2;
1111
1112         /* TPD */
1113         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1114                      (u32)((tpd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
1115         /* just enable normal priority TX queue */
1116         for (i = 0; i < tx_queue_count; i++) {
1117                 AT_WRITE_REG(hw, atl1c_qregs[i].tpd_addr_lo,
1118                              (u32)(tpd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1119         }
1120         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1121                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1122
1123
1124         /* RFD */
1125         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1126                      (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1127         for (i = 0; i < adapter->rx_queue_count; i++) {
1128                 AT_WRITE_REG(hw, atl1c_qregs[i].rfd_addr_lo,
1129                              (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1130         }
1131
1132         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1133                         rfd_ring->count & RFD_RING_SIZE_MASK);
1134         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1135                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1136
1137         /* RRD */
1138         for (i = 0; i < adapter->rx_queue_count; i++) {
1139                 AT_WRITE_REG(hw, atl1c_qregs[i].rrd_addr_lo,
1140                              (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1141         }
1142         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1143                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1144
1145         if (hw->nic_type == athr_l2c_b) {
1146                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1147                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1148                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1149                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1150                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1151                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1152                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1153                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1154         }
1155         /* Load all of base address above */
1156         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1157 }
1158
1159 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1160 {
1161         struct atl1c_hw *hw = &adapter->hw;
1162         int max_pay_load;
1163         u16 tx_offload_thresh;
1164         u32 txq_ctrl_data;
1165
1166         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1167         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1168                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1169         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1170         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1171         /*
1172          * if BIOS had changed the dam-read-max-length to an invalid value,
1173          * restore it to default value
1174          */
1175         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1176                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1177                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1178         }
1179         txq_ctrl_data =
1180                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1181                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1182
1183         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1184 }
1185
1186 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1187 {
1188         struct atl1c_hw *hw = &adapter->hw;
1189         u32 rxq_ctrl_data;
1190
1191         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1192                         RXQ_RFD_BURST_NUM_SHIFT;
1193
1194         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1195                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1196
1197         /* aspm for gigabit */
1198         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1199                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1200                         ASPM_THRUPUT_LIMIT_100M);
1201
1202         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1203 }
1204
1205 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1206 {
1207         struct atl1c_hw *hw = &adapter->hw;
1208         u32 dma_ctrl_data;
1209
1210         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1211                 DMA_CTRL_RREQ_PRI_DATA |
1212                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1213                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1214                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1215
1216         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1217 }
1218
1219 /*
1220  * Stop the mac, transmit and receive units
1221  * hw - Struct containing variables accessed by shared code
1222  * return : 0  or  idle status (if error)
1223  */
1224 static int atl1c_stop_mac(struct atl1c_hw *hw)
1225 {
1226         u32 data;
1227
1228         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1229         data &= ~RXQ_CTRL_EN;
1230         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1231
1232         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1233         data &= ~TXQ_CTRL_EN;
1234         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1235
1236         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1237
1238         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1239         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1240         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1241
1242         return (int)atl1c_wait_until_idle(hw,
1243                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1244 }
1245
1246 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1247 {
1248         struct atl1c_hw *hw = &adapter->hw;
1249         u32 mac, txq, rxq;
1250
1251         hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX;
1252         hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1253                 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1254
1255         AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1256         AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1257         AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1258
1259         txq |= TXQ_CTRL_EN;
1260         rxq |= RXQ_CTRL_EN;
1261         mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1262                MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1263                MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1264                MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1265                MAC_CTRL_HASH_ALG_CRC32;
1266         if (hw->mac_duplex)
1267                 mac |= MAC_CTRL_DUPLX;
1268         else
1269                 mac &= ~MAC_CTRL_DUPLX;
1270         mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1271         mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1272
1273         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1274         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1275         AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1276 }
1277
1278 /*
1279  * Reset the transmit and receive units; mask and clear all interrupts.
1280  * hw - Struct containing variables accessed by shared code
1281  * return : 0  or  idle status (if error)
1282  */
1283 static int atl1c_reset_mac(struct atl1c_hw *hw)
1284 {
1285         struct atl1c_adapter *adapter = hw->adapter;
1286         struct pci_dev *pdev = adapter->pdev;
1287         u32 ctrl_data = 0;
1288
1289         atl1c_stop_mac(hw);
1290         /*
1291          * Issue Soft Reset to the MAC.  This will reset the chip's
1292          * transmit, receive, DMA.  It will not effect
1293          * the current PCI configuration.  The global reset bit is self-
1294          * clearing, and should clear within a microsecond.
1295          */
1296         AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1297         ctrl_data |= MASTER_CTRL_OOB_DIS;
1298         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1299
1300         AT_WRITE_FLUSH(hw);
1301         msleep(10);
1302         /* Wait at least 10ms for All module to be Idle */
1303
1304         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1305                 dev_err(&pdev->dev,
1306                         "MAC state machine can't be idle since"
1307                         " disabled for 10ms second\n");
1308                 return -1;
1309         }
1310         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1311
1312         /* driver control speed/duplex */
1313         AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1314         AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1315
1316         /* clk switch setting */
1317         AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1318         switch (hw->nic_type) {
1319         case athr_l2c_b:
1320                 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1321                                 SERDES_MAC_CLK_SLOWDOWN);
1322                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1323                 break;
1324         case athr_l2c_b2:
1325         case athr_l1d_2:
1326                 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1327                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1328                 break;
1329         default:
1330                 break;
1331         }
1332
1333         return 0;
1334 }
1335
1336 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1337 {
1338         u16 ctrl_flags = hw->ctrl_flags;
1339
1340         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1341         atl1c_set_aspm(hw, SPEED_0);
1342         hw->ctrl_flags = ctrl_flags;
1343 }
1344
1345 /*
1346  * Set ASPM state.
1347  * Enable/disable L0s/L1 depend on link state.
1348  */
1349 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1350 {
1351         u32 pm_ctrl_data;
1352         u32 link_l1_timer;
1353
1354         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1355         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1356                           PM_CTRL_ASPM_L0S_EN |
1357                           PM_CTRL_MAC_ASPM_CHK);
1358         /* L1 timer */
1359         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1360                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1361                 link_l1_timer =
1362                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1363                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1364                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1365                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1366         } else {
1367                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1368                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1369                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1370                         link_l1_timer = 1;
1371                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1372                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1373         }
1374
1375         /* L0S/L1 enable */
1376         if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1377                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1378         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1379                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1380
1381         /* l2cb & l1d & l2cb2 & l1d2 */
1382         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1383             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1384                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1385                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1386                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1387                                 PM_CTRL_SERDES_PD_EX_L1 |
1388                                 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_SA_DLY_EN |
1393                                   PM_CTRL_HOTRST);
1394                 /* disable l0s if link down or l2cb */
1395                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1396                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1397         } else { /* l1c */
1398                 pm_ctrl_data =
1399                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1400                 if (link_speed != SPEED_0) {
1401                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1402                                         PM_CTRL_SERDES_PLL_L1_EN |
1403                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1404                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1405                                           PM_CTRL_CLK_SWH_L1 |
1406                                           PM_CTRL_ASPM_L0S_EN |
1407                                           PM_CTRL_ASPM_L1_EN);
1408                 } else { /* link down */
1409                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1410                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1411                                           PM_CTRL_SERDES_PLL_L1_EN |
1412                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1413                                           PM_CTRL_ASPM_L0S_EN);
1414                 }
1415         }
1416         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1417
1418         return;
1419 }
1420
1421 /**
1422  * atl1c_configure_mac - Configure Transmit&Receive Unit after Reset
1423  * @adapter: board private structure
1424  *
1425  * Configure the Tx /Rx unit of the MAC after a reset.
1426  */
1427 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1428 {
1429         struct atl1c_hw *hw = &adapter->hw;
1430         u32 master_ctrl_data = 0;
1431         u32 intr_modrt_data;
1432         u32 data;
1433
1434         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1435         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1436                               MASTER_CTRL_RX_ITIMER_EN |
1437                               MASTER_CTRL_INT_RDCLR);
1438         /* clear interrupt status */
1439         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1440         /*  Clear any WOL status */
1441         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1442         /* set Interrupt Clear Timer
1443          * HW will enable self to assert interrupt event to system after
1444          * waiting x-time for software to notify it accept interrupt.
1445          */
1446
1447         data = CLK_GATING_EN_ALL;
1448         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1449                 if (hw->nic_type == athr_l2c_b)
1450                         data &= ~CLK_GATING_RXMAC_EN;
1451         } else
1452                 data = 0;
1453         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1454
1455         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1456                 hw->ict & INT_RETRIG_TIMER_MASK);
1457
1458         atl1c_configure_des_ring(adapter);
1459
1460         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1461                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1462                                         IRQ_MODRT_TX_TIMER_SHIFT;
1463                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1464                                         IRQ_MODRT_RX_TIMER_SHIFT;
1465                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1466                 master_ctrl_data |=
1467                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1468         }
1469
1470         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1471                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1472
1473         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1474         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1475
1476         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1477                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1478
1479         /* set MTU */
1480         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1481                         VLAN_HLEN + ETH_FCS_LEN);
1482
1483         atl1c_configure_tx(adapter);
1484         atl1c_configure_rx(adapter);
1485         atl1c_configure_dma(adapter);
1486
1487         return 0;
1488 }
1489
1490 static int atl1c_configure(struct atl1c_adapter *adapter)
1491 {
1492         struct net_device *netdev = adapter->netdev;
1493         int num;
1494         int i;
1495
1496         if (adapter->hw.nic_type == athr_mt) {
1497                 u32 mode;
1498
1499                 AT_READ_REG(&adapter->hw, REG_MT_MODE, &mode);
1500                 if (adapter->rx_queue_count == 4)
1501                         mode |= MT_MODE_4Q;
1502                 else
1503                         mode &= ~MT_MODE_4Q;
1504                 AT_WRITE_REG(&adapter->hw, REG_MT_MODE, mode);
1505         }
1506
1507         atl1c_init_ring_ptrs(adapter);
1508         atl1c_set_multi(netdev);
1509         atl1c_restore_vlan(adapter);
1510
1511         for (i = 0; i < adapter->rx_queue_count; ++i) {
1512                 num = atl1c_alloc_rx_buffer(adapter, i, false);
1513                 if (unlikely(num == 0))
1514                         return -ENOMEM;
1515         }
1516
1517         if (atl1c_configure_mac(adapter))
1518                 return -EIO;
1519
1520         return 0;
1521 }
1522
1523 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1524 {
1525         u16 hw_reg_addr = 0;
1526         unsigned long *stats_item = NULL;
1527         u32 data;
1528
1529         /* update rx status */
1530         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1531         stats_item  = &adapter->hw_stats.rx_ok;
1532         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1533                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1534                 *stats_item += data;
1535                 stats_item++;
1536                 hw_reg_addr += 4;
1537         }
1538 /* update tx status */
1539         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1540         stats_item  = &adapter->hw_stats.tx_ok;
1541         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1542                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1543                 *stats_item += data;
1544                 stats_item++;
1545                 hw_reg_addr += 4;
1546         }
1547 }
1548
1549 /**
1550  * atl1c_get_stats - Get System Network Statistics
1551  * @netdev: network interface device structure
1552  *
1553  * Returns the address of the device statistics structure.
1554  * The statistics are actually updated from the timer callback.
1555  */
1556 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1557 {
1558         struct atl1c_adapter *adapter = netdev_priv(netdev);
1559         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1560         struct net_device_stats *net_stats = &netdev->stats;
1561
1562         atl1c_update_hw_stats(adapter);
1563         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1564         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1565         net_stats->multicast  = hw_stats->rx_mcast;
1566         net_stats->collisions = hw_stats->tx_1_col +
1567                                 hw_stats->tx_2_col +
1568                                 hw_stats->tx_late_col +
1569                                 hw_stats->tx_abort_col;
1570
1571         net_stats->rx_errors  = hw_stats->rx_frag +
1572                                 hw_stats->rx_fcs_err +
1573                                 hw_stats->rx_len_err +
1574                                 hw_stats->rx_sz_ov +
1575                                 hw_stats->rx_rrd_ov +
1576                                 hw_stats->rx_align_err +
1577                                 hw_stats->rx_rxf_ov;
1578
1579         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1580         net_stats->rx_length_errors = hw_stats->rx_len_err;
1581         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1582         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1583         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1584
1585         net_stats->tx_errors = hw_stats->tx_late_col +
1586                                hw_stats->tx_abort_col +
1587                                hw_stats->tx_underrun +
1588                                hw_stats->tx_trunc;
1589
1590         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1591         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1592         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1593
1594         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1595         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1596
1597         return net_stats;
1598 }
1599
1600 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1601 {
1602         u16 phy_data;
1603
1604         spin_lock(&adapter->mdio_lock);
1605         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1606         spin_unlock(&adapter->mdio_lock);
1607 }
1608
1609 static int atl1c_clean_tx(struct napi_struct *napi, int budget)
1610 {
1611         struct atl1c_tpd_ring *tpd_ring =
1612                 container_of(napi, struct atl1c_tpd_ring, napi);
1613         struct atl1c_adapter *adapter = tpd_ring->adapter;
1614         struct netdev_queue *txq =
1615                 netdev_get_tx_queue(napi->dev, tpd_ring->num);
1616         struct atl1c_buffer *buffer_info;
1617         struct pci_dev *pdev = adapter->pdev;
1618         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1619         u16 hw_next_to_clean;
1620         unsigned int total_bytes = 0, total_packets = 0;
1621         unsigned long flags;
1622
1623         AT_READ_REGW(&adapter->hw, atl1c_qregs[tpd_ring->num].tpd_cons,
1624                      &hw_next_to_clean);
1625
1626         while (next_to_clean != hw_next_to_clean) {
1627                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1628                 if (buffer_info->skb) {
1629                         total_bytes += buffer_info->skb->len;
1630                         total_packets++;
1631                 }
1632                 atl1c_clean_buffer(pdev, buffer_info);
1633                 if (++next_to_clean == tpd_ring->count)
1634                         next_to_clean = 0;
1635                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1636         }
1637
1638         netdev_tx_completed_queue(txq, total_packets, total_bytes);
1639
1640         if (netif_tx_queue_stopped(txq) && netif_carrier_ok(adapter->netdev))
1641                 netif_tx_wake_queue(txq);
1642
1643         if (total_packets < budget) {
1644                 napi_complete_done(napi, total_packets);
1645                 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1646                 adapter->hw.intr_mask |= atl1c_qregs[tpd_ring->num].tx_isr;
1647                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1648                 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
1649                 return total_packets;
1650         }
1651         return budget;
1652 }
1653
1654 static void atl1c_intr_rx_tx(struct atl1c_adapter *adapter, u32 status)
1655 {
1656         struct atl1c_hw *hw = &adapter->hw;
1657         u32 intr_mask;
1658         int i;
1659
1660         spin_lock(&hw->intr_mask_lock);
1661         intr_mask = hw->intr_mask;
1662         for (i = 0; i < adapter->rx_queue_count; ++i) {
1663                 if (!(status & atl1c_qregs[i].rx_isr))
1664                         continue;
1665                 if (napi_schedule_prep(&adapter->rrd_ring[i].napi)) {
1666                         intr_mask &= ~atl1c_qregs[i].rx_isr;
1667                         __napi_schedule(&adapter->rrd_ring[i].napi);
1668                 }
1669         }
1670         for (i = 0; i < adapter->tx_queue_count; ++i) {
1671                 if (!(status & atl1c_qregs[i].tx_isr))
1672                         continue;
1673                 if (napi_schedule_prep(&adapter->tpd_ring[i].napi)) {
1674                         intr_mask &= ~atl1c_qregs[i].tx_isr;
1675                         __napi_schedule(&adapter->tpd_ring[i].napi);
1676                 }
1677         }
1678
1679         if (hw->intr_mask != intr_mask) {
1680                 hw->intr_mask = intr_mask;
1681                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1682         }
1683         spin_unlock(&hw->intr_mask_lock);
1684 }
1685
1686 /**
1687  * atl1c_intr - Interrupt Handler
1688  * @irq: interrupt number
1689  * @data: pointer to a network interface device structure
1690  */
1691 static irqreturn_t atl1c_intr(int irq, void *data)
1692 {
1693         struct net_device *netdev  = data;
1694         struct atl1c_adapter *adapter = netdev_priv(netdev);
1695         struct pci_dev *pdev = adapter->pdev;
1696         struct atl1c_hw *hw = &adapter->hw;
1697         int max_ints = AT_MAX_INT_WORK;
1698         int handled = IRQ_NONE;
1699         u32 status;
1700         u32 reg_data;
1701
1702         do {
1703                 AT_READ_REG(hw, REG_ISR, &reg_data);
1704                 status = reg_data & hw->intr_mask;
1705
1706                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1707                         if (max_ints != AT_MAX_INT_WORK)
1708                                 handled = IRQ_HANDLED;
1709                         break;
1710                 }
1711                 /* link event */
1712                 if (status & ISR_GPHY)
1713                         atl1c_clear_phy_int(adapter);
1714                 /* Ack ISR */
1715                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1716                 if (status & (ISR_RX_PKT | ISR_TX_PKT))
1717                         atl1c_intr_rx_tx(adapter, status);
1718
1719                 handled = IRQ_HANDLED;
1720                 /* check if PCIE PHY Link down */
1721                 if (status & ISR_ERROR) {
1722                         if (netif_msg_hw(adapter))
1723                                 dev_err(&pdev->dev,
1724                                         "atl1c hardware error (status = 0x%x)\n",
1725                                         status & ISR_ERROR);
1726                         /* reset MAC */
1727                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1728                         schedule_work(&adapter->common_task);
1729                         return IRQ_HANDLED;
1730                 }
1731
1732                 if (status & ISR_OVER)
1733                         if (netif_msg_intr(adapter))
1734                                 dev_warn(&pdev->dev,
1735                                         "TX/RX overflow (status = 0x%x)\n",
1736                                         status & ISR_OVER);
1737
1738                 /* link event */
1739                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1740                         netdev->stats.tx_carrier_errors++;
1741                         atl1c_link_chg_event(adapter);
1742                         break;
1743                 }
1744
1745         } while (--max_ints > 0);
1746         /* re-enable Interrupt*/
1747         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1748         return handled;
1749 }
1750
1751 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1752                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1753 {
1754         if (adapter->hw.nic_type == athr_mt) {
1755                 if (prrs->word3 & RRS_MT_PROT_ID_TCPUDP)
1756                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1757                 return;
1758         }
1759         /*
1760          * The pid field in RRS in not correct sometimes, so we
1761          * cannot figure out if the packet is fragmented or not,
1762          * so we tell the KERNEL CHECKSUM_NONE
1763          */
1764         skb_checksum_none_assert(skb);
1765 }
1766
1767 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter,
1768                                        u32 queue, bool napi_mode)
1769 {
1770         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue];
1771         struct sk_buff *skb;
1772         struct page *page;
1773
1774         if (adapter->rx_frag_size > PAGE_SIZE) {
1775                 if (likely(napi_mode))
1776                         return napi_alloc_skb(&rrd_ring->napi,
1777                                               adapter->rx_buffer_len);
1778                 else
1779                         return netdev_alloc_skb_ip_align(adapter->netdev,
1780                                                          adapter->rx_buffer_len);
1781         }
1782
1783         page = rrd_ring->rx_page;
1784         if (!page) {
1785                 page = alloc_page(GFP_ATOMIC);
1786                 if (unlikely(!page))
1787                         return NULL;
1788                 rrd_ring->rx_page = page;
1789                 rrd_ring->rx_page_offset = 0;
1790         }
1791
1792         skb = build_skb(page_address(page) + rrd_ring->rx_page_offset,
1793                         adapter->rx_frag_size);
1794         if (likely(skb)) {
1795                 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
1796                 rrd_ring->rx_page_offset += adapter->rx_frag_size;
1797                 if (rrd_ring->rx_page_offset >= PAGE_SIZE)
1798                         rrd_ring->rx_page = NULL;
1799                 else
1800                         get_page(page);
1801         }
1802         return skb;
1803 }
1804
1805 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue,
1806                                  bool napi_mode)
1807 {
1808         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue];
1809         struct pci_dev *pdev = adapter->pdev;
1810         struct atl1c_buffer *buffer_info, *next_info;
1811         struct sk_buff *skb;
1812         void *vir_addr = NULL;
1813         u16 num_alloc = 0;
1814         u16 rfd_next_to_use, next_next;
1815         struct atl1c_rx_free_desc *rfd_desc;
1816         dma_addr_t mapping;
1817
1818         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1819         if (++next_next == rfd_ring->count)
1820                 next_next = 0;
1821         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1822         next_info = &rfd_ring->buffer_info[next_next];
1823
1824         while (next_info->flags & ATL1C_BUFFER_FREE) {
1825                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1826
1827                 skb = atl1c_alloc_skb(adapter, queue, napi_mode);
1828                 if (unlikely(!skb)) {
1829                         if (netif_msg_rx_err(adapter))
1830                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1831                         break;
1832                 }
1833
1834                 /*
1835                  * Make buffer alignment 2 beyond a 16 byte boundary
1836                  * this will result in a 16 byte aligned IP header after
1837                  * the 14 byte MAC header is removed
1838                  */
1839                 vir_addr = skb->data;
1840                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1841                 buffer_info->skb = skb;
1842                 buffer_info->length = adapter->rx_buffer_len;
1843                 mapping = dma_map_single(&pdev->dev, vir_addr,
1844                                          buffer_info->length, DMA_FROM_DEVICE);
1845                 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) {
1846                         dev_kfree_skb(skb);
1847                         buffer_info->skb = NULL;
1848                         buffer_info->length = 0;
1849                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1850                         netif_warn(adapter, rx_err, adapter->netdev, "RX dma_map_single failed");
1851                         break;
1852                 }
1853                 buffer_info->dma = mapping;
1854                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1855                         ATL1C_PCIMAP_FROMDEVICE);
1856                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1857                 rfd_next_to_use = next_next;
1858                 if (++next_next == rfd_ring->count)
1859                         next_next = 0;
1860                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1861                 next_info = &rfd_ring->buffer_info[next_next];
1862                 num_alloc++;
1863         }
1864
1865         if (num_alloc) {
1866                 /* TODO: update mailbox here */
1867                 wmb();
1868                 rfd_ring->next_to_use = rfd_next_to_use;
1869                 AT_WRITE_REG(&adapter->hw, atl1c_qregs[queue].rfd_prod,
1870                              rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1871         }
1872
1873         return num_alloc;
1874 }
1875
1876 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1877                         struct  atl1c_recv_ret_status *rrs, u16 num)
1878 {
1879         u16 i;
1880         /* the relationship between rrd and rfd is one map one */
1881         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1882                                         rrd_ring->next_to_clean)) {
1883                 rrs->word3 &= ~RRS_RXD_UPDATED;
1884                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1885                         rrd_ring->next_to_clean = 0;
1886         }
1887 }
1888
1889 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1890         struct atl1c_recv_ret_status *rrs, u16 num)
1891 {
1892         u16 i;
1893         u16 rfd_index;
1894         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1895
1896         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1897                         RRS_RX_RFD_INDEX_MASK;
1898         for (i = 0; i < num; i++) {
1899                 buffer_info[rfd_index].skb = NULL;
1900                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1901                                         ATL1C_BUFFER_FREE);
1902                 if (++rfd_index == rfd_ring->count)
1903                         rfd_index = 0;
1904         }
1905         rfd_ring->next_to_clean = rfd_index;
1906 }
1907
1908 /**
1909  * atl1c_clean_rx - NAPI Rx polling callback
1910  * @napi: napi info
1911  * @budget: limit of packets to clean
1912  */
1913 static int atl1c_clean_rx(struct napi_struct *napi, int budget)
1914 {
1915         struct atl1c_rrd_ring *rrd_ring =
1916                 container_of(napi, struct atl1c_rrd_ring, napi);
1917         struct atl1c_adapter *adapter = rrd_ring->adapter;
1918         u16 rfd_num, rfd_index;
1919         u16 length;
1920         struct pci_dev *pdev = adapter->pdev;
1921         struct net_device *netdev  = adapter->netdev;
1922         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[rrd_ring->num];
1923         struct sk_buff *skb;
1924         struct atl1c_recv_ret_status *rrs;
1925         struct atl1c_buffer *buffer_info;
1926         int work_done = 0;
1927         unsigned long flags;
1928
1929         /* Keep link state information with original netdev */
1930         if (!netif_carrier_ok(adapter->netdev))
1931                 goto quit_polling;
1932
1933         while (1) {
1934                 if (work_done >= budget)
1935                         break;
1936                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1937                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1938                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1939                                 RRS_RX_RFD_CNT_MASK;
1940                         if (unlikely(rfd_num != 1))
1941                                 /* TODO support mul rfd*/
1942                                 if (netif_msg_rx_err(adapter))
1943                                         dev_warn(&pdev->dev,
1944                                                 "Multi rfd not support yet!\n");
1945                         goto rrs_checked;
1946                 } else {
1947                         break;
1948                 }
1949 rrs_checked:
1950                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1951                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1952                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1953                         if (netif_msg_rx_err(adapter))
1954                                 dev_warn(&pdev->dev,
1955                                          "wrong packet! rrs word3 is %x\n",
1956                                          rrs->word3);
1957                         continue;
1958                 }
1959
1960                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1961                                 RRS_PKT_SIZE_MASK);
1962                 /* Good Receive */
1963                 if (likely(rfd_num == 1)) {
1964                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1965                                         RRS_RX_RFD_INDEX_MASK;
1966                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1967                         dma_unmap_single(&pdev->dev, buffer_info->dma,
1968                                          buffer_info->length, DMA_FROM_DEVICE);
1969                         skb = buffer_info->skb;
1970                 } else {
1971                         /* TODO */
1972                         if (netif_msg_rx_err(adapter))
1973                                 dev_warn(&pdev->dev,
1974                                         "Multi rfd not support yet!\n");
1975                         break;
1976                 }
1977                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1978                 skb_put(skb, length - ETH_FCS_LEN);
1979                 skb->protocol = eth_type_trans(skb, netdev);
1980                 atl1c_rx_checksum(adapter, skb, rrs);
1981                 if (rrs->word3 & RRS_VLAN_INS) {
1982                         u16 vlan;
1983
1984                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1985                         vlan = le16_to_cpu(vlan);
1986                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1987                 }
1988                 napi_gro_receive(napi, skb);
1989
1990                 work_done++;
1991         }
1992         if (work_done)
1993                 atl1c_alloc_rx_buffer(adapter, rrd_ring->num, true);
1994
1995         if (work_done < budget) {
1996 quit_polling:
1997                 napi_complete_done(napi, work_done);
1998                 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1999                 adapter->hw.intr_mask |= atl1c_qregs[rrd_ring->num].rx_isr;
2000                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
2001                 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
2002         }
2003         return work_done;
2004 }
2005
2006 #ifdef CONFIG_NET_POLL_CONTROLLER
2007
2008 /*
2009  * Polling 'interrupt' - used by things like netconsole to send skbs
2010  * without having to re-enable interrupts. It's not called while
2011  * the interrupt routine is executing.
2012  */
2013 static void atl1c_netpoll(struct net_device *netdev)
2014 {
2015         struct atl1c_adapter *adapter = netdev_priv(netdev);
2016
2017         disable_irq(adapter->pdev->irq);
2018         atl1c_intr(adapter->pdev->irq, netdev);
2019         enable_irq(adapter->pdev->irq);
2020 }
2021 #endif
2022
2023 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, u32 queue)
2024 {
2025         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2026         u16 next_to_use = 0;
2027         u16 next_to_clean = 0;
2028
2029         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
2030         next_to_use   = tpd_ring->next_to_use;
2031
2032         return (u16)(next_to_clean > next_to_use) ?
2033                 (next_to_clean - next_to_use - 1) :
2034                 (tpd_ring->count + next_to_clean - next_to_use - 1);
2035 }
2036
2037 /*
2038  * get next usable tpd
2039  * Note: should call atl1c_tdp_avail to make sure
2040  * there is enough tpd to use
2041  */
2042 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
2043                                             u32 queue)
2044 {
2045         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2046         struct atl1c_tpd_desc *tpd_desc;
2047         u16 next_to_use = 0;
2048
2049         next_to_use = tpd_ring->next_to_use;
2050         if (++tpd_ring->next_to_use == tpd_ring->count)
2051                 tpd_ring->next_to_use = 0;
2052         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
2053         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
2054         return  tpd_desc;
2055 }
2056
2057 static struct atl1c_buffer *
2058 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
2059 {
2060         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
2061
2062         return &tpd_ring->buffer_info[tpd -
2063                         (struct atl1c_tpd_desc *)tpd_ring->desc];
2064 }
2065
2066 /* Calculate the transmit packet descript needed*/
2067 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
2068 {
2069         u16 tpd_req;
2070         u16 proto_hdr_len = 0;
2071
2072         tpd_req = skb_shinfo(skb)->nr_frags + 1;
2073
2074         if (skb_is_gso(skb)) {
2075                 proto_hdr_len = skb_tcp_all_headers(skb);
2076                 if (proto_hdr_len < skb_headlen(skb))
2077                         tpd_req++;
2078                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
2079                         tpd_req++;
2080         }
2081         return tpd_req;
2082 }
2083
2084 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
2085                           struct sk_buff *skb,
2086                           struct atl1c_tpd_desc **tpd,
2087                           u32 queue)
2088 {
2089         struct pci_dev *pdev = adapter->pdev;
2090         unsigned short offload_type;
2091         u8 hdr_len;
2092         u32 real_len;
2093
2094         if (skb_is_gso(skb)) {
2095                 int err;
2096
2097                 err = skb_cow_head(skb, 0);
2098                 if (err < 0)
2099                         return err;
2100
2101                 offload_type = skb_shinfo(skb)->gso_type;
2102
2103                 if (offload_type & SKB_GSO_TCPV4) {
2104                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2105                                         + ntohs(ip_hdr(skb)->tot_len));
2106
2107                         if (real_len < skb->len)
2108                                 pskb_trim(skb, real_len);
2109
2110                         hdr_len = skb_tcp_all_headers(skb);
2111                         if (unlikely(skb->len == hdr_len)) {
2112                                 /* only xsum need */
2113                                 if (netif_msg_tx_queued(adapter))
2114                                         dev_warn(&pdev->dev,
2115                                                 "IPV4 tso with zero data??\n");
2116                                 goto check_sum;
2117                         } else {
2118                                 ip_hdr(skb)->check = 0;
2119                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2120                                                         ip_hdr(skb)->saddr,
2121                                                         ip_hdr(skb)->daddr,
2122                                                         0, IPPROTO_TCP, 0);
2123                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2124                         }
2125                 }
2126
2127                 if (offload_type & SKB_GSO_TCPV6) {
2128                         struct atl1c_tpd_ext_desc *etpd =
2129                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2130
2131                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2132                         *tpd = atl1c_get_tpd(adapter, queue);
2133                         ipv6_hdr(skb)->payload_len = 0;
2134                         /* check payload == 0 byte ? */
2135                         hdr_len = skb_tcp_all_headers(skb);
2136                         if (unlikely(skb->len == hdr_len)) {
2137                                 /* only xsum need */
2138                                 if (netif_msg_tx_queued(adapter))
2139                                         dev_warn(&pdev->dev,
2140                                                 "IPV6 tso with zero data??\n");
2141                                 goto check_sum;
2142                         } else
2143                                 tcp_v6_gso_csum_prep(skb);
2144
2145                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2146                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2147                         etpd->pkt_len = cpu_to_le32(skb->len);
2148                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2149                 }
2150
2151                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2152                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2153                                 TPD_TCPHDR_OFFSET_SHIFT;
2154                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2155                                 TPD_MSS_SHIFT;
2156                 return 0;
2157         }
2158
2159 check_sum:
2160         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2161                 u8 css, cso;
2162                 cso = skb_checksum_start_offset(skb);
2163
2164                 if (unlikely(cso & 0x1)) {
2165                         if (netif_msg_tx_err(adapter))
2166                                 dev_err(&adapter->pdev->dev,
2167                                         "payload offset should not an event number\n");
2168                         return -1;
2169                 } else {
2170                         css = cso + skb->csum_offset;
2171
2172                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2173                                         TPD_PLOADOFFSET_SHIFT;
2174                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2175                                         TPD_CCSUM_OFFSET_SHIFT;
2176                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2177                 }
2178         }
2179         return 0;
2180 }
2181
2182 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2183                               struct atl1c_tpd_desc *first_tpd,
2184                               u32 queue)
2185 {
2186         struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[queue];
2187         struct atl1c_buffer *buffer_info;
2188         struct atl1c_tpd_desc *tpd;
2189         u16 first_index, index;
2190
2191         first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2192         index = first_index;
2193         while (index != tpd_ring->next_to_use) {
2194                 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2195                 buffer_info = &tpd_ring->buffer_info[index];
2196                 atl1c_clean_buffer(adpt->pdev, buffer_info);
2197                 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2198                 if (++index == tpd_ring->count)
2199                         index = 0;
2200         }
2201         tpd_ring->next_to_use = first_index;
2202 }
2203
2204 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2205                         struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2206                         u32 queue)
2207 {
2208         struct atl1c_tpd_desc *use_tpd = NULL;
2209         struct atl1c_buffer *buffer_info = NULL;
2210         u16 buf_len = skb_headlen(skb);
2211         u16 map_len = 0;
2212         u16 mapped_len = 0;
2213         u16 hdr_len = 0;
2214         u16 nr_frags;
2215         u16 f;
2216         int tso;
2217
2218         nr_frags = skb_shinfo(skb)->nr_frags;
2219         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2220         if (tso) {
2221                 /* TSO */
2222                 hdr_len = skb_tcp_all_headers(skb);
2223                 map_len = hdr_len;
2224                 use_tpd = tpd;
2225
2226                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2227                 buffer_info->length = map_len;
2228                 buffer_info->dma = dma_map_single(&adapter->pdev->dev,
2229                                                   skb->data, hdr_len,
2230                                                   DMA_TO_DEVICE);
2231                 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2232                         goto err_dma;
2233                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2234                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2235                         ATL1C_PCIMAP_TODEVICE);
2236                 mapped_len += map_len;
2237                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2238                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2239         }
2240
2241         if (mapped_len < buf_len) {
2242                 /* mapped_len == 0, means we should use the first tpd,
2243                    which is given by caller  */
2244                 if (mapped_len == 0)
2245                         use_tpd = tpd;
2246                 else {
2247                         use_tpd = atl1c_get_tpd(adapter, queue);
2248                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2249                 }
2250                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2251                 buffer_info->length = buf_len - mapped_len;
2252                 buffer_info->dma =
2253                         dma_map_single(&adapter->pdev->dev,
2254                                        skb->data + mapped_len,
2255                                        buffer_info->length, DMA_TO_DEVICE);
2256                 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2257                         goto err_dma;
2258
2259                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2260                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2261                         ATL1C_PCIMAP_TODEVICE);
2262                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2263                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2264         }
2265
2266         for (f = 0; f < nr_frags; f++) {
2267                 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2268
2269                 use_tpd = atl1c_get_tpd(adapter, queue);
2270                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2271
2272                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2273                 buffer_info->length = skb_frag_size(frag);
2274                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2275                                                     frag, 0,
2276                                                     buffer_info->length,
2277                                                     DMA_TO_DEVICE);
2278                 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2279                         goto err_dma;
2280
2281                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2282                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2283                         ATL1C_PCIMAP_TODEVICE);
2284                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2285                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2286         }
2287
2288         /* The last tpd */
2289         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2290         /* The last buffer info contain the skb address,
2291            so it will be free after unmap */
2292         buffer_info->skb = skb;
2293
2294         return 0;
2295
2296 err_dma:
2297         buffer_info->dma = 0;
2298         buffer_info->length = 0;
2299         return -1;
2300 }
2301
2302 static void atl1c_tx_queue(struct atl1c_adapter *adapter, u32 queue)
2303 {
2304         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2305
2306         AT_WRITE_REGW(&adapter->hw, atl1c_qregs[queue].tpd_prod,
2307                       tpd_ring->next_to_use);
2308 }
2309
2310 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2311                                           struct net_device *netdev)
2312 {
2313         struct atl1c_adapter *adapter = netdev_priv(netdev);
2314         u32 queue = skb_get_queue_mapping(skb);
2315         struct netdev_queue *txq = netdev_get_tx_queue(netdev, queue);
2316         struct atl1c_tpd_desc *tpd;
2317         u16 tpd_req;
2318
2319         if (test_bit(__AT_DOWN, &adapter->flags)) {
2320                 dev_kfree_skb_any(skb);
2321                 return NETDEV_TX_OK;
2322         }
2323
2324         tpd_req = atl1c_cal_tpd_req(skb);
2325
2326         if (atl1c_tpd_avail(adapter, queue) < tpd_req) {
2327                 /* no enough descriptor, just stop queue */
2328                 atl1c_tx_queue(adapter, queue);
2329                 netif_tx_stop_queue(txq);
2330                 return NETDEV_TX_BUSY;
2331         }
2332
2333         tpd = atl1c_get_tpd(adapter, queue);
2334
2335         /* do TSO and check sum */
2336         if (atl1c_tso_csum(adapter, skb, &tpd, queue) != 0) {
2337                 atl1c_tx_queue(adapter, queue);
2338                 dev_kfree_skb_any(skb);
2339                 return NETDEV_TX_OK;
2340         }
2341
2342         if (unlikely(skb_vlan_tag_present(skb))) {
2343                 u16 vlan = skb_vlan_tag_get(skb);
2344                 __le16 tag;
2345
2346                 vlan = cpu_to_le16(vlan);
2347                 AT_VLAN_TO_TAG(vlan, tag);
2348                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2349                 tpd->vlan_tag = tag;
2350         }
2351
2352         if (skb_network_offset(skb) != ETH_HLEN)
2353                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2354
2355         if (atl1c_tx_map(adapter, skb, tpd, queue) < 0) {
2356                 netif_info(adapter, tx_done, adapter->netdev,
2357                            "tx-skb dropped due to dma error\n");
2358                 /* roll back tpd/buffer */
2359                 atl1c_tx_rollback(adapter, tpd, queue);
2360                 dev_kfree_skb_any(skb);
2361         } else {
2362                 bool more = netdev_xmit_more();
2363
2364                 if (__netdev_tx_sent_queue(txq, skb->len, more))
2365                         atl1c_tx_queue(adapter, queue);
2366         }
2367
2368         return NETDEV_TX_OK;
2369 }
2370
2371 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2372 {
2373         struct net_device *netdev = adapter->netdev;
2374
2375         free_irq(adapter->pdev->irq, netdev);
2376
2377         if (adapter->have_msi)
2378                 pci_disable_msi(adapter->pdev);
2379 }
2380
2381 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2382 {
2383         struct pci_dev    *pdev   = adapter->pdev;
2384         struct net_device *netdev = adapter->netdev;
2385         int flags = 0;
2386         int err = 0;
2387
2388         adapter->have_msi = true;
2389         err = pci_enable_msi(adapter->pdev);
2390         if (err) {
2391                 if (netif_msg_ifup(adapter))
2392                         dev_err(&pdev->dev,
2393                                 "Unable to allocate MSI interrupt Error: %d\n",
2394                                 err);
2395                 adapter->have_msi = false;
2396         }
2397
2398         if (!adapter->have_msi)
2399                 flags |= IRQF_SHARED;
2400         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2401                         netdev->name, netdev);
2402         if (err) {
2403                 if (netif_msg_ifup(adapter))
2404                         dev_err(&pdev->dev,
2405                                 "Unable to allocate interrupt Error: %d\n",
2406                                 err);
2407                 if (adapter->have_msi)
2408                         pci_disable_msi(adapter->pdev);
2409                 return err;
2410         }
2411         if (netif_msg_ifup(adapter))
2412                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2413         return err;
2414 }
2415
2416
2417 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2418 {
2419         int i;
2420         /* release tx-pending skbs and reset tx/rx ring index */
2421         for (i = 0; i < adapter->tx_queue_count; ++i)
2422                 atl1c_clean_tx_ring(adapter, i);
2423         for (i = 0; i < adapter->rx_queue_count; ++i)
2424                 atl1c_clean_rx_ring(adapter, i);
2425 }
2426
2427 static int atl1c_up(struct atl1c_adapter *adapter)
2428 {
2429         struct net_device *netdev = adapter->netdev;
2430         int err;
2431         int i;
2432
2433         netif_carrier_off(netdev);
2434
2435         err = atl1c_configure(adapter);
2436         if (unlikely(err))
2437                 goto err_up;
2438
2439         err = atl1c_request_irq(adapter);
2440         if (unlikely(err))
2441                 goto err_up;
2442
2443         atl1c_check_link_status(adapter);
2444         clear_bit(__AT_DOWN, &adapter->flags);
2445         for (i = 0; i < adapter->tx_queue_count; ++i)
2446                 napi_enable(&adapter->tpd_ring[i].napi);
2447         for (i = 0; i < adapter->rx_queue_count; ++i)
2448                 napi_enable(&adapter->rrd_ring[i].napi);
2449         atl1c_irq_enable(adapter);
2450         netif_start_queue(netdev);
2451         return err;
2452
2453 err_up:
2454         for (i = 0; i < adapter->rx_queue_count; ++i)
2455                 atl1c_clean_rx_ring(adapter, i);
2456         return err;
2457 }
2458
2459 static void atl1c_down(struct atl1c_adapter *adapter)
2460 {
2461         struct net_device *netdev = adapter->netdev;
2462         int i;
2463
2464         atl1c_del_timer(adapter);
2465         adapter->work_event = 0; /* clear all event */
2466         /* signal that we're down so the interrupt handler does not
2467          * reschedule our watchdog timer */
2468         set_bit(__AT_DOWN, &adapter->flags);
2469         netif_carrier_off(netdev);
2470         for (i = 0; i < adapter->tx_queue_count; ++i)
2471                 napi_disable(&adapter->tpd_ring[i].napi);
2472         for (i = 0; i < adapter->rx_queue_count; ++i)
2473                 napi_disable(&adapter->rrd_ring[i].napi);
2474         atl1c_irq_disable(adapter);
2475         atl1c_free_irq(adapter);
2476         /* disable ASPM if device inactive */
2477         atl1c_disable_l0s_l1(&adapter->hw);
2478         /* reset MAC to disable all RX/TX */
2479         atl1c_reset_mac(&adapter->hw);
2480         msleep(1);
2481
2482         adapter->link_speed = SPEED_0;
2483         adapter->link_duplex = -1;
2484         atl1c_reset_dma_ring(adapter);
2485 }
2486
2487 /**
2488  * atl1c_open - Called when a network interface is made active
2489  * @netdev: network interface device structure
2490  *
2491  * Returns 0 on success, negative value on failure
2492  *
2493  * The open entry point is called when a network interface is made
2494  * active by the system (IFF_UP).  At this point all resources needed
2495  * for transmit and receive operations are allocated, the interrupt
2496  * handler is registered with the OS, the watchdog timer is started,
2497  * and the stack is notified that the interface is ready.
2498  */
2499 static int atl1c_open(struct net_device *netdev)
2500 {
2501         struct atl1c_adapter *adapter = netdev_priv(netdev);
2502         int err;
2503
2504         /* disallow open during test */
2505         if (test_bit(__AT_TESTING, &adapter->flags))
2506                 return -EBUSY;
2507
2508         /* allocate rx/tx dma buffer & descriptors */
2509         err = atl1c_setup_ring_resources(adapter);
2510         if (unlikely(err))
2511                 return err;
2512
2513         err = atl1c_up(adapter);
2514         if (unlikely(err))
2515                 goto err_up;
2516
2517         return 0;
2518
2519 err_up:
2520         atl1c_free_irq(adapter);
2521         atl1c_free_ring_resources(adapter);
2522         atl1c_reset_mac(&adapter->hw);
2523         return err;
2524 }
2525
2526 /**
2527  * atl1c_close - Disables a network interface
2528  * @netdev: network interface device structure
2529  *
2530  * Returns 0, this is not allowed to fail
2531  *
2532  * The close entry point is called when an interface is de-activated
2533  * by the OS.  The hardware is still under the drivers control, but
2534  * needs to be disabled.  A global MAC reset is issued to stop the
2535  * hardware, and all transmit and receive resources are freed.
2536  */
2537 static int atl1c_close(struct net_device *netdev)
2538 {
2539         struct atl1c_adapter *adapter = netdev_priv(netdev);
2540
2541         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2542         set_bit(__AT_DOWN, &adapter->flags);
2543         cancel_work_sync(&adapter->common_task);
2544         atl1c_down(adapter);
2545         atl1c_free_ring_resources(adapter);
2546         return 0;
2547 }
2548
2549 static int atl1c_suspend(struct device *dev)
2550 {
2551         struct net_device *netdev = dev_get_drvdata(dev);
2552         struct atl1c_adapter *adapter = netdev_priv(netdev);
2553         struct atl1c_hw *hw = &adapter->hw;
2554         u32 wufc = adapter->wol;
2555
2556         atl1c_disable_l0s_l1(hw);
2557         if (netif_running(netdev)) {
2558                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2559                 atl1c_down(adapter);
2560         }
2561         netif_device_detach(netdev);
2562
2563         if (wufc)
2564                 if (atl1c_phy_to_ps_link(hw) != 0)
2565                         dev_dbg(dev, "phy power saving failed");
2566
2567         atl1c_power_saving(hw, wufc);
2568
2569         return 0;
2570 }
2571
2572 #ifdef CONFIG_PM_SLEEP
2573 static int atl1c_resume(struct device *dev)
2574 {
2575         struct net_device *netdev = dev_get_drvdata(dev);
2576         struct atl1c_adapter *adapter = netdev_priv(netdev);
2577
2578         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2579         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2580
2581         atl1c_phy_reset(&adapter->hw);
2582         atl1c_reset_mac(&adapter->hw);
2583         atl1c_phy_init(&adapter->hw);
2584
2585         netif_device_attach(netdev);
2586         if (netif_running(netdev))
2587                 atl1c_up(adapter);
2588
2589         return 0;
2590 }
2591 #endif
2592
2593 static void atl1c_shutdown(struct pci_dev *pdev)
2594 {
2595         struct net_device *netdev = pci_get_drvdata(pdev);
2596         struct atl1c_adapter *adapter = netdev_priv(netdev);
2597
2598         atl1c_suspend(&pdev->dev);
2599         pci_wake_from_d3(pdev, adapter->wol);
2600         pci_set_power_state(pdev, PCI_D3hot);
2601 }
2602
2603 static const struct net_device_ops atl1c_netdev_ops = {
2604         .ndo_open               = atl1c_open,
2605         .ndo_stop               = atl1c_close,
2606         .ndo_validate_addr      = eth_validate_addr,
2607         .ndo_start_xmit         = atl1c_xmit_frame,
2608         .ndo_set_mac_address    = atl1c_set_mac_addr,
2609         .ndo_set_rx_mode        = atl1c_set_multi,
2610         .ndo_change_mtu         = atl1c_change_mtu,
2611         .ndo_fix_features       = atl1c_fix_features,
2612         .ndo_set_features       = atl1c_set_features,
2613         .ndo_eth_ioctl          = atl1c_ioctl,
2614         .ndo_tx_timeout         = atl1c_tx_timeout,
2615         .ndo_get_stats          = atl1c_get_stats,
2616 #ifdef CONFIG_NET_POLL_CONTROLLER
2617         .ndo_poll_controller    = atl1c_netpoll,
2618 #endif
2619 };
2620
2621 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2622 {
2623         SET_NETDEV_DEV(netdev, &pdev->dev);
2624         pci_set_drvdata(pdev, netdev);
2625
2626         netdev->netdev_ops = &atl1c_netdev_ops;
2627         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2628         netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2629         atl1c_set_ethtool_ops(netdev);
2630
2631         /* TODO: add when ready */
2632         netdev->hw_features =   NETIF_F_SG              |
2633                                 NETIF_F_HW_CSUM         |
2634                                 NETIF_F_HW_VLAN_CTAG_RX |
2635                                 NETIF_F_TSO             |
2636                                 NETIF_F_TSO6;
2637         netdev->features =      netdev->hw_features     |
2638                                 NETIF_F_HW_VLAN_CTAG_TX;
2639         return 0;
2640 }
2641
2642 /**
2643  * atl1c_probe - Device Initialization Routine
2644  * @pdev: PCI device information struct
2645  * @ent: entry in atl1c_pci_tbl
2646  *
2647  * Returns 0 on success, negative on failure
2648  *
2649  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2650  * The OS initialization, configuring of the adapter private structure,
2651  * and a hardware reset occur.
2652  */
2653 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2654 {
2655         struct net_device *netdev;
2656         struct atl1c_adapter *adapter;
2657         static int cards_found;
2658         u8 __iomem *hw_addr;
2659         enum atl1c_nic_type nic_type;
2660         u32 queue_count = 1;
2661         int err = 0;
2662         int i;
2663
2664         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2665         err = pci_enable_device_mem(pdev);
2666         if (err)
2667                 return dev_err_probe(&pdev->dev, err, "cannot enable PCI device\n");
2668
2669         /*
2670          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2671          * shared register for the high 32 bits, so only a single, aligned,
2672          * 4 GB physical address range can be used at a time.
2673          *
2674          * Supporting 64-bit DMA on this hardware is more trouble than it's
2675          * worth.  It is far easier to limit to 32-bit DMA than update
2676          * various kernel subsystems to support the mechanics required by a
2677          * fixed-high-32-bit system.
2678          */
2679         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2680         if (err) {
2681                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2682                 goto err_dma;
2683         }
2684
2685         err = pci_request_regions(pdev, atl1c_driver_name);
2686         if (err) {
2687                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2688                 goto err_pci_reg;
2689         }
2690
2691         pci_set_master(pdev);
2692
2693         hw_addr = pci_ioremap_bar(pdev, 0);
2694         if (!hw_addr) {
2695                 err = -EIO;
2696                 dev_err(&pdev->dev, "cannot map device registers\n");
2697                 goto err_ioremap;
2698         }
2699
2700         nic_type = atl1c_get_mac_type(pdev, hw_addr);
2701         if (nic_type == athr_mt)
2702                 queue_count = 4;
2703
2704         netdev = alloc_etherdev_mq(sizeof(struct atl1c_adapter), queue_count);
2705         if (netdev == NULL) {
2706                 err = -ENOMEM;
2707                 goto err_alloc_etherdev;
2708         }
2709
2710         err = atl1c_init_netdev(netdev, pdev);
2711         if (err) {
2712                 dev_err(&pdev->dev, "init netdevice failed\n");
2713                 goto err_init_netdev;
2714         }
2715         adapter = netdev_priv(netdev);
2716         adapter->bd_number = cards_found;
2717         adapter->netdev = netdev;
2718         adapter->pdev = pdev;
2719         adapter->hw.adapter = adapter;
2720         adapter->hw.nic_type = nic_type;
2721         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2722         adapter->hw.hw_addr = hw_addr;
2723         adapter->tx_queue_count = queue_count;
2724         adapter->rx_queue_count = queue_count;
2725
2726         /* init mii data */
2727         adapter->mii.dev = netdev;
2728         adapter->mii.mdio_read  = atl1c_mdio_read;
2729         adapter->mii.mdio_write = atl1c_mdio_write;
2730         adapter->mii.phy_id_mask = 0x1f;
2731         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2732         dev_set_threaded(netdev, true);
2733         for (i = 0; i < adapter->rx_queue_count; ++i)
2734                 netif_napi_add(netdev, &adapter->rrd_ring[i].napi,
2735                                atl1c_clean_rx, 64);
2736         for (i = 0; i < adapter->tx_queue_count; ++i)
2737                 netif_napi_add(netdev, &adapter->tpd_ring[i].napi,
2738                                atl1c_clean_tx, 64);
2739         timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0);
2740         /* setup the private structure */
2741         err = atl1c_sw_init(adapter);
2742         if (err) {
2743                 dev_err(&pdev->dev, "net device private data init failed\n");
2744                 goto err_sw_init;
2745         }
2746         /* set max MTU */
2747         atl1c_set_max_mtu(netdev);
2748
2749         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2750
2751         /* Init GPHY as early as possible due to power saving issue  */
2752         atl1c_phy_reset(&adapter->hw);
2753
2754         err = atl1c_reset_mac(&adapter->hw);
2755         if (err) {
2756                 err = -EIO;
2757                 goto err_reset;
2758         }
2759
2760         /* reset the controller to
2761          * put the device in a known good starting state */
2762         err = atl1c_phy_init(&adapter->hw);
2763         if (err) {
2764                 err = -EIO;
2765                 goto err_reset;
2766         }
2767         if (atl1c_read_mac_addr(&adapter->hw)) {
2768                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2769                 netdev->addr_assign_type = NET_ADDR_RANDOM;
2770         }
2771         eth_hw_addr_set(netdev, adapter->hw.mac_addr);
2772         if (netif_msg_probe(adapter))
2773                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2774                         adapter->hw.mac_addr);
2775
2776         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2777         INIT_WORK(&adapter->common_task, atl1c_common_task);
2778         adapter->work_event = 0;
2779         err = register_netdev(netdev);
2780         if (err) {
2781                 dev_err(&pdev->dev, "register netdevice failed\n");
2782                 goto err_register;
2783         }
2784
2785         cards_found++;
2786         return 0;
2787
2788 err_reset:
2789 err_register:
2790 err_sw_init:
2791 err_init_netdev:
2792         free_netdev(netdev);
2793 err_alloc_etherdev:
2794         iounmap(hw_addr);
2795 err_ioremap:
2796         pci_release_regions(pdev);
2797 err_pci_reg:
2798 err_dma:
2799         pci_disable_device(pdev);
2800         return err;
2801 }
2802
2803 /**
2804  * atl1c_remove - Device Removal Routine
2805  * @pdev: PCI device information struct
2806  *
2807  * atl1c_remove is called by the PCI subsystem to alert the driver
2808  * that it should release a PCI device.  The could be caused by a
2809  * Hot-Plug event, or because the driver is going to be removed from
2810  * memory.
2811  */
2812 static void atl1c_remove(struct pci_dev *pdev)
2813 {
2814         struct net_device *netdev = pci_get_drvdata(pdev);
2815         struct atl1c_adapter *adapter = netdev_priv(netdev);
2816
2817         unregister_netdev(netdev);
2818         /* restore permanent address */
2819         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2820         atl1c_phy_disable(&adapter->hw);
2821
2822         iounmap(adapter->hw.hw_addr);
2823
2824         pci_release_regions(pdev);
2825         pci_disable_device(pdev);
2826         free_netdev(netdev);
2827 }
2828
2829 /**
2830  * atl1c_io_error_detected - called when PCI error is detected
2831  * @pdev: Pointer to PCI device
2832  * @state: The current pci connection state
2833  *
2834  * This function is called after a PCI bus error affecting
2835  * this device has been detected.
2836  */
2837 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2838                                                 pci_channel_state_t state)
2839 {
2840         struct net_device *netdev = pci_get_drvdata(pdev);
2841         struct atl1c_adapter *adapter = netdev_priv(netdev);
2842
2843         netif_device_detach(netdev);
2844
2845         if (state == pci_channel_io_perm_failure)
2846                 return PCI_ERS_RESULT_DISCONNECT;
2847
2848         if (netif_running(netdev))
2849                 atl1c_down(adapter);
2850
2851         pci_disable_device(pdev);
2852
2853         /* Request a slot reset. */
2854         return PCI_ERS_RESULT_NEED_RESET;
2855 }
2856
2857 /**
2858  * atl1c_io_slot_reset - called after the pci bus has been reset.
2859  * @pdev: Pointer to PCI device
2860  *
2861  * Restart the card from scratch, as if from a cold-boot. Implementation
2862  * resembles the first-half of the e1000_resume routine.
2863  */
2864 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2865 {
2866         struct net_device *netdev = pci_get_drvdata(pdev);
2867         struct atl1c_adapter *adapter = netdev_priv(netdev);
2868
2869         if (pci_enable_device(pdev)) {
2870                 if (netif_msg_hw(adapter))
2871                         dev_err(&pdev->dev,
2872                                 "Cannot re-enable PCI device after reset\n");
2873                 return PCI_ERS_RESULT_DISCONNECT;
2874         }
2875         pci_set_master(pdev);
2876
2877         pci_enable_wake(pdev, PCI_D3hot, 0);
2878         pci_enable_wake(pdev, PCI_D3cold, 0);
2879
2880         atl1c_reset_mac(&adapter->hw);
2881
2882         return PCI_ERS_RESULT_RECOVERED;
2883 }
2884
2885 /**
2886  * atl1c_io_resume - called when traffic can start flowing again.
2887  * @pdev: Pointer to PCI device
2888  *
2889  * This callback is called when the error recovery driver tells us that
2890  * its OK to resume normal operation. Implementation resembles the
2891  * second-half of the atl1c_resume routine.
2892  */
2893 static void atl1c_io_resume(struct pci_dev *pdev)
2894 {
2895         struct net_device *netdev = pci_get_drvdata(pdev);
2896         struct atl1c_adapter *adapter = netdev_priv(netdev);
2897
2898         if (netif_running(netdev)) {
2899                 if (atl1c_up(adapter)) {
2900                         if (netif_msg_hw(adapter))
2901                                 dev_err(&pdev->dev,
2902                                         "Cannot bring device back up after reset\n");
2903                         return;
2904                 }
2905         }
2906
2907         netif_device_attach(netdev);
2908 }
2909
2910 static const struct pci_error_handlers atl1c_err_handler = {
2911         .error_detected = atl1c_io_error_detected,
2912         .slot_reset = atl1c_io_slot_reset,
2913         .resume = atl1c_io_resume,
2914 };
2915
2916 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2917
2918 static struct pci_driver atl1c_driver = {
2919         .name     = atl1c_driver_name,
2920         .id_table = atl1c_pci_tbl,
2921         .probe    = atl1c_probe,
2922         .remove   = atl1c_remove,
2923         .shutdown = atl1c_shutdown,
2924         .err_handler = &atl1c_err_handler,
2925         .driver.pm = &atl1c_pm_ops,
2926 };
2927
2928 module_pci_driver(atl1c_driver);