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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   4  *
   5  * Derived from Intel e1000 driver
   6  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   7  */
   8
   9 #include "atl1c.h"
  10
  11 char atl1c_driver_name[] = "atl1c";
  12
  13 /*
  14  * atl1c_pci_tbl - PCI Device ID Table
  15  *
  16  * Wildcard entries (PCI_ANY_ID) should come last
  17  * Last entry must be all 0s
  18  *
  19  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  20  *   Class, Class Mask, private data (not used) }
  21  */
  22 static const struct pci_device_id atl1c_pci_tbl[] = {
  23         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  24         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  25         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  26         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  27         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  28         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  29         /* required last entry */
  30         { 0 }
  31 };
  32 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  33
  34 MODULE_AUTHOR("Jie Yang");
  35 MODULE_AUTHOR("Qualcomm Atheros Inc.");
  36 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver");
  37 MODULE_LICENSE("GPL");
  38
  39 struct atl1c_qregs {
  40         u16 tpd_addr_lo;
  41         u16 tpd_prod;
  42         u16 tpd_cons;
  43         u16 rfd_addr_lo;
  44         u16 rrd_addr_lo;
  45         u16 rfd_prod;
  46         u32 tx_isr;
  47         u32 rx_isr;
  48 };
  49
  50 static struct atl1c_qregs atl1c_qregs[AT_MAX_TRANSMIT_QUEUE] = {
  51         {
  52                 REG_TPD_PRI0_ADDR_LO, REG_TPD_PRI0_PIDX, REG_TPD_PRI0_CIDX,
  53                 REG_RFD0_HEAD_ADDR_LO, REG_RRD0_HEAD_ADDR_LO,
  54                 REG_MB_RFD0_PROD_IDX, ISR_TX_PKT_0, ISR_RX_PKT_0
  55         },
  56         {
  57                 REG_TPD_PRI1_ADDR_LO, REG_TPD_PRI1_PIDX, REG_TPD_PRI1_CIDX,
  58                 REG_RFD1_HEAD_ADDR_LO, REG_RRD1_HEAD_ADDR_LO,
  59                 REG_MB_RFD1_PROD_IDX, ISR_TX_PKT_1, ISR_RX_PKT_1
  60         },
  61         {
  62                 REG_TPD_PRI2_ADDR_LO, REG_TPD_PRI2_PIDX, REG_TPD_PRI2_CIDX,
  63                 REG_RFD2_HEAD_ADDR_LO, REG_RRD2_HEAD_ADDR_LO,
  64                 REG_MB_RFD2_PROD_IDX, ISR_TX_PKT_2, ISR_RX_PKT_2
  65         },
  66         {
  67                 REG_TPD_PRI3_ADDR_LO, REG_TPD_PRI3_PIDX, REG_TPD_PRI3_CIDX,
  68                 REG_RFD3_HEAD_ADDR_LO, REG_RRD3_HEAD_ADDR_LO,
  69                 REG_MB_RFD3_PROD_IDX, ISR_TX_PKT_3, ISR_RX_PKT_3
  70         },
  71 };
  72
  73 static int atl1c_stop_mac(struct atl1c_hw *hw);
  74 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  75 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed);
  76 static void atl1c_start_mac(struct atl1c_adapter *adapter);
  77 static int atl1c_up(struct atl1c_adapter *adapter);
  78 static void atl1c_down(struct atl1c_adapter *adapter);
  79 static int atl1c_reset_mac(struct atl1c_hw *hw);
  80 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter);
  81 static int atl1c_configure(struct atl1c_adapter *adapter);
  82 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue,
  83                                  bool napi_mode);
  84
  85
  86 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
  87         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
  88 static void atl1c_pcie_patch(struct atl1c_hw *hw)
  89 {
  90         u32 mst_data, data;
  91
  92         /* pclk sel could switch to 25M */
  93         AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data);
  94         mst_data &= ~MASTER_CTRL_CLK_SEL_DIS;
  95         AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data);
  96
  97         /* WoL/PCIE related settings */
  98         if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
  99                 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
 100                 data |= PCIE_PHYMISC_FORCE_RCV_DET;
 101                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
 102         } else { /* new dev set bit5 of MASTER */
 103                 if (!(mst_data & MASTER_CTRL_WAKEN_25M))
 104                         AT_WRITE_REG(hw, REG_MASTER_CTRL,
 105                                 mst_data | MASTER_CTRL_WAKEN_25M);
 106         }
 107         /* aspm/PCIE setting only for l2cb 1.0 */
 108         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
 109                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
 110                 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW,
 111                         L2CB1_PCIE_PHYMISC2_CDR_BW);
 112                 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH,
 113                         L2CB1_PCIE_PHYMISC2_L0S_TH);
 114                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
 115                 /* extend L1 sync timer */
 116                 AT_READ_REG(hw, REG_LINK_CTRL, &data);
 117                 data |= LINK_CTRL_EXT_SYNC;
 118                 AT_WRITE_REG(hw, REG_LINK_CTRL, data);
 119         }
 120         /* l2cb 1.x & l1d 1.x */
 121         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) {
 122                 AT_READ_REG(hw, REG_PM_CTRL, &data);
 123                 data |= PM_CTRL_L0S_BUFSRX_EN;
 124                 AT_WRITE_REG(hw, REG_PM_CTRL, data);
 125                 /* clear vendor msg */
 126                 AT_READ_REG(hw, REG_DMA_DBG, &data);
 127                 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG);
 128         }
 129 }
 130
 131 /* FIXME: no need any more ? */
 132 /*
 133  * atl1c_init_pcie - init PCIE module
 134  */
 135 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 136 {
 137         u32 data;
 138         u32 pci_cmd;
 139         struct pci_dev *pdev = hw->adapter->pdev;
 140         int pos;
 141
 142         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 143         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 144         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 145                 PCI_COMMAND_IO);
 146         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 147
 148         /*
 149          * Clear any PowerSaveing Settings
 150          */
 151         pci_enable_wake(pdev, PCI_D3hot, 0);
 152         pci_enable_wake(pdev, PCI_D3cold, 0);
 153         /* wol sts read-clear */
 154         AT_READ_REG(hw, REG_WOL_CTRL, &data);
 155         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
 156
 157         /*
 158          * Mask some pcie error bits
 159          */
 160         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 161         if (pos) {
 162                 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data);
 163                 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP);
 164                 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data);
 165         }
 166         /* clear error status */
 167         pcie_capability_write_word(pdev, PCI_EXP_DEVSTA,
 168                         PCI_EXP_DEVSTA_NFED |
 169                         PCI_EXP_DEVSTA_FED |
 170                         PCI_EXP_DEVSTA_CED |
 171                         PCI_EXP_DEVSTA_URD);
 172
 173         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 174         data &= ~LTSSM_ID_EN_WRO;
 175         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 176
 177         atl1c_pcie_patch(hw);
 178         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 179                 atl1c_disable_l0s_l1(hw);
 180
 181         msleep(5);
 182 }
 183
 184 /**
 185  * atl1c_irq_enable - Enable default interrupt generation settings
 186  * @adapter: board private structure
 187  */
 188 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 189 {
 190         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 191                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 192                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 193                 AT_WRITE_FLUSH(&adapter->hw);
 194         }
 195 }
 196
 197 /**
 198  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 199  * @adapter: board private structure
 200  */
 201 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 202 {
 203         atomic_inc(&adapter->irq_sem);
 204         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 205         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 206         AT_WRITE_FLUSH(&adapter->hw);
 207         synchronize_irq(adapter->pdev->irq);
 208 }
 209
 210 /*
 211  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 212  * of the idle status register until the device is actually idle
 213  */
 214 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl)
 215 {
 216         int timeout;
 217         u32 data;
 218
 219         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 220                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 221                 if ((data & modu_ctrl) == 0)
 222                         return 0;
 223                 msleep(1);
 224         }
 225         return data;
 226 }
 227
 228 /**
 229  * atl1c_phy_config - Timer Call-back
 230  * @t: timer list containing pointer to netdev cast into an unsigned long
 231  */
 232 static void atl1c_phy_config(struct timer_list *t)
 233 {
 234         struct atl1c_adapter *adapter = from_timer(adapter, t,
 235                                                    phy_config_timer);
 236         struct atl1c_hw *hw = &adapter->hw;
 237         unsigned long flags;
 238
 239         spin_lock_irqsave(&adapter->mdio_lock, flags);
 240         atl1c_restart_autoneg(hw);
 241         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 242 }
 243
 244 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 245 {
 246         atl1c_down(adapter);
 247         atl1c_up(adapter);
 248         clear_bit(__AT_RESETTING, &adapter->flags);
 249 }
 250
 251 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 252 {
 253         struct atl1c_hw *hw = &adapter->hw;
 254         struct net_device *netdev = adapter->netdev;
 255         struct pci_dev    *pdev   = adapter->pdev;
 256         int err;
 257         unsigned long flags;
 258         u16 speed, duplex;
 259         bool link;
 260
 261         spin_lock_irqsave(&adapter->mdio_lock, flags);
 262         link = atl1c_get_link_status(hw);
 263         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 264
 265         if (!link) {
 266                 /* link down */
 267                 netif_carrier_off(netdev);
 268                 hw->hibernate = true;
 269                 if (atl1c_reset_mac(hw) != 0)
 270                         if (netif_msg_hw(adapter))
 271                                 dev_warn(&pdev->dev, "reset mac failed\n");
 272                 atl1c_set_aspm(hw, SPEED_0);
 273                 atl1c_post_phy_linkchg(hw, SPEED_0);
 274                 atl1c_reset_dma_ring(adapter);
 275                 atl1c_configure(adapter);
 276         } else {
 277                 /* Link Up */
 278                 hw->hibernate = false;
 279                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 280                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 281                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 282                 if (unlikely(err))
 283                         return;
 284                 /* link result is our setting */
 285                 if (adapter->link_speed != speed ||
 286                     adapter->link_duplex != duplex) {
 287                         adapter->link_speed  = speed;
 288                         adapter->link_duplex = duplex;
 289                         atl1c_set_aspm(hw, speed);
 290                         atl1c_post_phy_linkchg(hw, speed);
 291                         atl1c_start_mac(adapter);
 292                         if (netif_msg_link(adapter))
 293                                 dev_info(&pdev->dev,
 294                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 295                                         atl1c_driver_name, netdev->name,
 296                                         adapter->link_speed,
 297                                         adapter->link_duplex == FULL_DUPLEX ?
 298                                         "Full Duplex" : "Half Duplex");
 299                 }
 300                 if (!netif_carrier_ok(netdev))
 301                         netif_carrier_on(netdev);
 302         }
 303 }
 304
 305 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 306 {
 307         struct net_device *netdev = adapter->netdev;
 308         struct pci_dev    *pdev   = adapter->pdev;
 309         bool link;
 310
 311         spin_lock(&adapter->mdio_lock);
 312         link = atl1c_get_link_status(&adapter->hw);
 313         spin_unlock(&adapter->mdio_lock);
 314         /* notify upper layer link down ASAP */
 315         if (!link) {
 316                 if (netif_carrier_ok(netdev)) {
 317                         /* old link state: Up */
 318                         netif_carrier_off(netdev);
 319                         if (netif_msg_link(adapter))
 320                                 dev_info(&pdev->dev,
 321                                         "%s: %s NIC Link is Down\n",
 322                                         atl1c_driver_name, netdev->name);
 323                         adapter->link_speed = SPEED_0;
 324                 }
 325         }
 326
 327         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 328         schedule_work(&adapter->common_task);
 329 }
 330
 331 static void atl1c_common_task(struct work_struct *work)
 332 {
 333         struct atl1c_adapter *adapter;
 334         struct net_device *netdev;
 335
 336         adapter = container_of(work, struct atl1c_adapter, common_task);
 337         netdev = adapter->netdev;
 338
 339         if (test_bit(__AT_DOWN, &adapter->flags))
 340                 return;
 341
 342         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 343                 netif_device_detach(netdev);
 344                 atl1c_down(adapter);
 345                 atl1c_up(adapter);
 346                 netif_device_attach(netdev);
 347         }
 348
 349         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 350                 &adapter->work_event)) {
 351                 atl1c_irq_disable(adapter);
 352                 atl1c_check_link_status(adapter);
 353                 atl1c_irq_enable(adapter);
 354         }
 355 }
 356
 357
 358 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 359 {
 360         del_timer_sync(&adapter->phy_config_timer);
 361 }
 362
 363
 364 /**
 365  * atl1c_tx_timeout - Respond to a Tx Hang
 366  * @netdev: network interface device structure
 367  * @txqueue: index of hanging tx queue
 368  */
 369 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 370 {
 371         struct atl1c_adapter *adapter = netdev_priv(netdev);
 372
 373         /* Do the reset outside of interrupt context */
 374         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 375         schedule_work(&adapter->common_task);
 376 }
 377
 378 /**
 379  * atl1c_set_multi - Multicast and Promiscuous mode set
 380  * @netdev: network interface device structure
 381  *
 382  * The set_multi entry point is called whenever the multicast address
 383  * list or the network interface flags are updated.  This routine is
 384  * responsible for configuring the hardware for proper multicast,
 385  * promiscuous mode, and all-multi behavior.
 386  */
 387 static void atl1c_set_multi(struct net_device *netdev)
 388 {
 389         struct atl1c_adapter *adapter = netdev_priv(netdev);
 390         struct atl1c_hw *hw = &adapter->hw;
 391         struct netdev_hw_addr *ha;
 392         u32 mac_ctrl_data;
 393         u32 hash_value;
 394
 395         /* Check for Promiscuous and All Multicast modes */
 396         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 397
 398         if (netdev->flags & IFF_PROMISC) {
 399                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 400         } else if (netdev->flags & IFF_ALLMULTI) {
 401                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 402                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 403         } else {
 404                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 405         }
 406
 407         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 408
 409         /* clear the old settings from the multicast hash table */
 410         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 411         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 412
 413         /* comoute mc addresses' hash value ,and put it into hash table */
 414         netdev_for_each_mc_addr(ha, netdev) {
 415                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 416                 atl1c_hash_set(hw, hash_value);
 417         }
 418 }
 419
 420 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 421 {
 422         if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 423                 /* enable VLAN tag insert/strip */
 424                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 425         } else {
 426                 /* disable VLAN tag insert/strip */
 427                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 428         }
 429 }
 430
 431 static void atl1c_vlan_mode(struct net_device *netdev,
 432         netdev_features_t features)
 433 {
 434         struct atl1c_adapter *adapter = netdev_priv(netdev);
 435         struct pci_dev *pdev = adapter->pdev;
 436         u32 mac_ctrl_data = 0;
 437
 438         if (netif_msg_pktdata(adapter))
 439                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 440
 441         atl1c_irq_disable(adapter);
 442         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 443         __atl1c_vlan_mode(features, &mac_ctrl_data);
 444         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 445         atl1c_irq_enable(adapter);
 446 }
 447
 448 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 449 {
 450         struct pci_dev *pdev = adapter->pdev;
 451
 452         if (netif_msg_pktdata(adapter))
 453                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 454         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 455 }
 456
 457 /**
 458  * atl1c_set_mac_addr - Change the Ethernet Address of the NIC
 459  * @netdev: network interface device structure
 460  * @p: pointer to an address structure
 461  *
 462  * Returns 0 on success, negative on failure
 463  */
 464 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 465 {
 466         struct atl1c_adapter *adapter = netdev_priv(netdev);
 467         struct sockaddr *addr = p;
 468
 469         if (!is_valid_ether_addr(addr->sa_data))
 470                 return -EADDRNOTAVAIL;
 471
 472         if (netif_running(netdev))
 473                 return -EBUSY;
 474
 475         eth_hw_addr_set(netdev, addr->sa_data);
 476         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 477
 478         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
 479
 480         return 0;
 481 }
 482
 483 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 484                                 struct net_device *dev)
 485 {
 486         unsigned int head_size;
 487         int mtu = dev->mtu;
 488
 489         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 490                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 491
 492         head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD + NET_IP_ALIGN) +
 493                     SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 494         adapter->rx_frag_size = roundup_pow_of_two(head_size);
 495 }
 496
 497 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 498         netdev_features_t features)
 499 {
 500         struct atl1c_adapter *adapter = netdev_priv(netdev);
 501         struct atl1c_hw *hw = &adapter->hw;
 502
 503         /*
 504          * Since there is no support for separate rx/tx vlan accel
 505          * enable/disable make sure tx flag is always in same state as rx.
 506          */
 507         if (features & NETIF_F_HW_VLAN_CTAG_RX)
 508                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 509         else
 510                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 511
 512         if (hw->nic_type != athr_mt) {
 513                 if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 514                         features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 515         }
 516
 517         return features;
 518 }
 519
 520 static int atl1c_set_features(struct net_device *netdev,
 521         netdev_features_t features)
 522 {
 523         netdev_features_t changed = netdev->features ^ features;
 524
 525         if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 526                 atl1c_vlan_mode(netdev, features);
 527
 528         return 0;
 529 }
 530
 531 static void atl1c_set_max_mtu(struct net_device *netdev)
 532 {
 533         struct atl1c_adapter *adapter = netdev_priv(netdev);
 534         struct atl1c_hw *hw = &adapter->hw;
 535
 536         switch (hw->nic_type) {
 537         /* These (GbE) devices support jumbo packets, max_mtu 6122 */
 538         case athr_l1c:
 539         case athr_l1d:
 540         case athr_l1d_2:
 541                 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
 542                         (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
 543                 break;
 544         case athr_mt:
 545                 netdev->max_mtu = 9500;
 546                 break;
 547                 /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */
 548         default:
 549                 netdev->max_mtu = ETH_DATA_LEN;
 550                 break;
 551         }
 552 }
 553
 554 /**
 555  * atl1c_change_mtu - Change the Maximum Transfer Unit
 556  * @netdev: network interface device structure
 557  * @new_mtu: new value for maximum frame size
 558  *
 559  * Returns 0 on success, negative on failure
 560  */
 561 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 562 {
 563         struct atl1c_adapter *adapter = netdev_priv(netdev);
 564
 565         /* set MTU */
 566         if (netif_running(netdev)) {
 567                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 568                         msleep(1);
 569                 netdev->mtu = new_mtu;
 570                 adapter->hw.max_frame_size = new_mtu;
 571                 atl1c_set_rxbufsize(adapter, netdev);
 572                 atl1c_down(adapter);
 573                 netdev_update_features(netdev);
 574                 atl1c_up(adapter);
 575                 clear_bit(__AT_RESETTING, &adapter->flags);
 576         }
 577         return 0;
 578 }
 579
 580 /*
 581  *  caller should hold mdio_lock
 582  */
 583 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 584 {
 585         struct atl1c_adapter *adapter = netdev_priv(netdev);
 586         u16 result;
 587
 588         atl1c_read_phy_reg(&adapter->hw, reg_num, &result);
 589         return result;
 590 }
 591
 592 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 593                              int reg_num, int val)
 594 {
 595         struct atl1c_adapter *adapter = netdev_priv(netdev);
 596
 597         atl1c_write_phy_reg(&adapter->hw, reg_num, val);
 598 }
 599
 600 static int atl1c_mii_ioctl(struct net_device *netdev,
 601                            struct ifreq *ifr, int cmd)
 602 {
 603         struct atl1c_adapter *adapter = netdev_priv(netdev);
 604         struct pci_dev *pdev = adapter->pdev;
 605         struct mii_ioctl_data *data = if_mii(ifr);
 606         unsigned long flags;
 607         int retval = 0;
 608
 609         if (!netif_running(netdev))
 610                 return -EINVAL;
 611
 612         spin_lock_irqsave(&adapter->mdio_lock, flags);
 613         switch (cmd) {
 614         case SIOCGMIIPHY:
 615                 data->phy_id = 0;
 616                 break;
 617
 618         case SIOCGMIIREG:
 619                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 620                                     &data->val_out)) {
 621                         retval = -EIO;
 622                         goto out;
 623                 }
 624                 break;
 625
 626         case SIOCSMIIREG:
 627                 if (data->reg_num & ~(0x1F)) {
 628                         retval = -EFAULT;
 629                         goto out;
 630                 }
 631
 632                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 633                                 data->reg_num, data->val_in);
 634                 if (atl1c_write_phy_reg(&adapter->hw,
 635                                      data->reg_num, data->val_in)) {
 636                         retval = -EIO;
 637                         goto out;
 638                 }
 639                 break;
 640
 641         default:
 642                 retval = -EOPNOTSUPP;
 643                 break;
 644         }
 645 out:
 646         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 647         return retval;
 648 }
 649
 650 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 651 {
 652         switch (cmd) {
 653         case SIOCGMIIPHY:
 654         case SIOCGMIIREG:
 655         case SIOCSMIIREG:
 656                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 657         default:
 658                 return -EOPNOTSUPP;
 659         }
 660 }
 661
 662 /**
 663  * atl1c_alloc_queues - Allocate memory for all rings
 664  * @adapter: board private structure to initialize
 665  *
 666  */
 667 static int atl1c_alloc_queues(struct atl1c_adapter *adapter)
 668 {
 669         return 0;
 670 }
 671
 672 static enum atl1c_nic_type atl1c_get_mac_type(struct pci_dev *pdev,
 673                                               u8 __iomem *hw_addr)
 674 {
 675         switch (pdev->device) {
 676         case PCI_DEVICE_ID_ATTANSIC_L2C:
 677                 return athr_l2c;
 678         case PCI_DEVICE_ID_ATTANSIC_L1C:
 679                 return athr_l1c;
 680         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 681                 return athr_l2c_b;
 682         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 683                 return athr_l2c_b2;
 684         case PCI_DEVICE_ID_ATHEROS_L1D:
 685                 return athr_l1d;
 686         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 687                 if (readl(hw_addr + REG_MT_MAGIC) == MT_MAGIC)
 688                         return athr_mt;
 689                 return athr_l1d_2;
 690         default:
 691                 return athr_l1c;
 692         }
 693 }
 694
 695 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 696 {
 697         u32 link_ctrl_data;
 698
 699         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 700
 701         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 702                          ATL1C_TXQ_MODE_ENHANCE;
 703         hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT |
 704                           ATL1C_ASPM_L1_SUPPORT;
 705         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 706
 707         if (hw->nic_type == athr_l1c ||
 708             hw->nic_type == athr_l1d ||
 709             hw->nic_type == athr_l1d_2)
 710                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 711         return 0;
 712 }
 713
 714 struct atl1c_platform_patch {
 715         u16 pci_did;
 716         u8  pci_revid;
 717         u16 subsystem_vid;
 718         u16 subsystem_did;
 719         u32 patch_flag;
 720 #define ATL1C_LINK_PATCH        0x1
 721 };
 722 static const struct atl1c_platform_patch plats[] = {
 723 {0x2060, 0xC1, 0x1019, 0x8152, 0x1},
 724 {0x2060, 0xC1, 0x1019, 0x2060, 0x1},
 725 {0x2060, 0xC1, 0x1019, 0xE000, 0x1},
 726 {0x2062, 0xC0, 0x1019, 0x8152, 0x1},
 727 {0x2062, 0xC0, 0x1019, 0x2062, 0x1},
 728 {0x2062, 0xC0, 0x1458, 0xE000, 0x1},
 729 {0x2062, 0xC1, 0x1019, 0x8152, 0x1},
 730 {0x2062, 0xC1, 0x1019, 0x2062, 0x1},
 731 {0x2062, 0xC1, 0x1458, 0xE000, 0x1},
 732 {0x2062, 0xC1, 0x1565, 0x2802, 0x1},
 733 {0x2062, 0xC1, 0x1565, 0x2801, 0x1},
 734 {0x1073, 0xC0, 0x1019, 0x8151, 0x1},
 735 {0x1073, 0xC0, 0x1019, 0x1073, 0x1},
 736 {0x1073, 0xC0, 0x1458, 0xE000, 0x1},
 737 {0x1083, 0xC0, 0x1458, 0xE000, 0x1},
 738 {0x1083, 0xC0, 0x1019, 0x8151, 0x1},
 739 {0x1083, 0xC0, 0x1019, 0x1083, 0x1},
 740 {0x1083, 0xC0, 0x1462, 0x7680, 0x1},
 741 {0x1083, 0xC0, 0x1565, 0x2803, 0x1},
 742 {0},
 743 };
 744
 745 static void atl1c_patch_assign(struct atl1c_hw *hw)
 746 {
 747         struct pci_dev  *pdev = hw->adapter->pdev;
 748         u32 misc_ctrl;
 749         int i = 0;
 750
 751         hw->msi_lnkpatch = false;
 752
 753         while (plats[i].pci_did != 0) {
 754                 if (plats[i].pci_did == hw->device_id &&
 755                     plats[i].pci_revid == hw->revision_id &&
 756                     plats[i].subsystem_vid == hw->subsystem_vendor_id &&
 757                     plats[i].subsystem_did == hw->subsystem_id) {
 758                         if (plats[i].patch_flag & ATL1C_LINK_PATCH)
 759                                 hw->msi_lnkpatch = true;
 760                 }
 761                 i++;
 762         }
 763
 764         if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 &&
 765             hw->revision_id == L2CB_V21) {
 766                 /* config access mode */
 767                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 768                                        REG_PCIE_DEV_MISC_CTRL);
 769                 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl);
 770                 misc_ctrl &= ~0x100;
 771                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR,
 772                                        REG_PCIE_DEV_MISC_CTRL);
 773                 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl);
 774         }
 775 }
 776 /**
 777  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 778  * @adapter: board private structure to initialize
 779  *
 780  * atl1c_sw_init initializes the Adapter private data structure.
 781  * Fields are initialized based on PCI device information and
 782  * OS network device settings (MTU size).
 783  */
 784 static int atl1c_sw_init(struct atl1c_adapter *adapter)
 785 {
 786         struct atl1c_hw *hw   = &adapter->hw;
 787         struct pci_dev  *pdev = adapter->pdev;
 788         u32 revision;
 789         int i;
 790
 791         adapter->wol = 0;
 792         device_set_wakeup_enable(&pdev->dev, false);
 793         adapter->link_speed = SPEED_0;
 794         adapter->link_duplex = FULL_DUPLEX;
 795         adapter->tpd_ring[0].count = 1024;
 796         adapter->rfd_ring[0].count = 512;
 797
 798         hw->vendor_id = pdev->vendor;
 799         hw->device_id = pdev->device;
 800         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 801         hw->subsystem_id = pdev->subsystem_device;
 802         pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision);
 803         hw->revision_id = revision & 0xFF;
 804         /* before link up, we assume hibernate is true */
 805         hw->hibernate = true;
 806         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 807         if (atl1c_setup_mac_funcs(hw) != 0) {
 808                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 809                 return -1;
 810         }
 811         atl1c_patch_assign(hw);
 812
 813         hw->intr_mask = IMR_NORMAL_MASK;
 814         for (i = 0; i < adapter->tx_queue_count; ++i)
 815                 hw->intr_mask |= atl1c_qregs[i].tx_isr;
 816         for (i = 0; i < adapter->rx_queue_count; ++i)
 817                 hw->intr_mask |= atl1c_qregs[i].rx_isr;
 818         hw->phy_configured = false;
 819         hw->preamble_len = 7;
 820         hw->max_frame_size = adapter->netdev->mtu;
 821         hw->autoneg_advertised = ADVERTISED_Autoneg;
 822         hw->indirect_tab = 0xE4E4E4E4;
 823         hw->base_cpu = 0;
 824
 825         hw->ict = 50000;                /* 100ms */
 826         hw->smb_timer = 200000;         /* 400ms */
 827         hw->rx_imt = 200;
 828         hw->tx_imt = 1000;
 829
 830         hw->tpd_burst = 5;
 831         hw->rfd_burst = 8;
 832         hw->dma_order = atl1c_dma_ord_out;
 833         hw->dmar_block = atl1c_dma_req_1024;
 834
 835         if (atl1c_alloc_queues(adapter)) {
 836                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 837                 return -ENOMEM;
 838         }
 839         /* TODO */
 840         atl1c_set_rxbufsize(adapter, adapter->netdev);
 841         atomic_set(&adapter->irq_sem, 1);
 842         spin_lock_init(&adapter->mdio_lock);
 843         spin_lock_init(&adapter->hw.intr_mask_lock);
 844         set_bit(__AT_DOWN, &adapter->flags);
 845
 846         return 0;
 847 }
 848
 849 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 850                                 struct atl1c_buffer *buffer_info)
 851 {
 852         u16 pci_driection;
 853         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 854                 return;
 855         if (buffer_info->dma) {
 856                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 857                         pci_driection = DMA_FROM_DEVICE;
 858                 else
 859                         pci_driection = DMA_TO_DEVICE;
 860
 861                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 862                         dma_unmap_single(&pdev->dev, buffer_info->dma,
 863                                          buffer_info->length, pci_driection);
 864                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 865                         dma_unmap_page(&pdev->dev, buffer_info->dma,
 866                                        buffer_info->length, pci_driection);
 867         }
 868         if (buffer_info->skb)
 869                 dev_consume_skb_any(buffer_info->skb);
 870         buffer_info->dma = 0;
 871         buffer_info->skb = NULL;
 872         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 873 }
 874 /**
 875  * atl1c_clean_tx_ring - Free Tx-skb
 876  * @adapter: board private structure
 877  * @queue: idx of transmit queue
 878  */
 879 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 880                                 u32 queue)
 881 {
 882         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
 883         struct atl1c_buffer *buffer_info;
 884         struct pci_dev *pdev = adapter->pdev;
 885         u16 index, ring_count;
 886
 887         ring_count = tpd_ring->count;
 888         for (index = 0; index < ring_count; index++) {
 889                 buffer_info = &tpd_ring->buffer_info[index];
 890                 atl1c_clean_buffer(pdev, buffer_info);
 891         }
 892
 893         netdev_tx_reset_queue(netdev_get_tx_queue(adapter->netdev, queue));
 894
 895         /* Zero out Tx-buffers */
 896         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 897                 ring_count);
 898         atomic_set(&tpd_ring->next_to_clean, 0);
 899         tpd_ring->next_to_use = 0;
 900 }
 901
 902 /**
 903  * atl1c_clean_rx_ring - Free rx-reservation skbs
 904  * @adapter: board private structure
 905  * @queue: idx of transmit queue
 906  */
 907 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter, u32 queue)
 908 {
 909         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue];
 910         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue];
 911         struct atl1c_buffer *buffer_info;
 912         struct pci_dev *pdev = adapter->pdev;
 913         int j;
 914
 915         for (j = 0; j < rfd_ring->count; j++) {
 916                 buffer_info = &rfd_ring->buffer_info[j];
 917                 atl1c_clean_buffer(pdev, buffer_info);
 918         }
 919         /* zero out the descriptor ring */
 920         memset(rfd_ring->desc, 0, rfd_ring->size);
 921         rfd_ring->next_to_clean = 0;
 922         rfd_ring->next_to_use = 0;
 923         rrd_ring->next_to_use = 0;
 924         rrd_ring->next_to_clean = 0;
 925 }
 926
 927 /*
 928  * Read / Write Ptr Initialize:
 929  */
 930 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 931 {
 932         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 933         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 934         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 935         struct atl1c_buffer *buffer_info;
 936         int i, j;
 937
 938         for (i = 0; i < adapter->tx_queue_count; i++) {
 939                 tpd_ring[i].next_to_use = 0;
 940                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 941                 buffer_info = tpd_ring[i].buffer_info;
 942                 for (j = 0; j < tpd_ring->count; j++)
 943                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 944                                                ATL1C_BUFFER_FREE);
 945         }
 946         for (i = 0; i < adapter->rx_queue_count; i++) {
 947                 rfd_ring[i].next_to_use = 0;
 948                 rfd_ring[i].next_to_clean = 0;
 949                 rrd_ring[i].next_to_use = 0;
 950                 rrd_ring[i].next_to_clean = 0;
 951                 for (j = 0; j < rfd_ring[i].count; j++) {
 952                         buffer_info = &rfd_ring[i].buffer_info[j];
 953                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 954                 }
 955         }
 956 }
 957
 958 /**
 959  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 960  * @adapter: board private structure
 961  *
 962  * Free all transmit software resources
 963  */
 964 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 965 {
 966         struct pci_dev *pdev = adapter->pdev;
 967         int i;
 968
 969         dma_free_coherent(&pdev->dev, adapter->ring_header.size,
 970                           adapter->ring_header.desc, adapter->ring_header.dma);
 971         adapter->ring_header.desc = NULL;
 972
 973         /* Note: just free tdp_ring.buffer_info,
 974          * it contain rfd_ring.buffer_info, do not double free
 975          */
 976         if (adapter->tpd_ring[0].buffer_info) {
 977                 kfree(adapter->tpd_ring[0].buffer_info);
 978                 adapter->tpd_ring[0].buffer_info = NULL;
 979         }
 980         for (i = 0; i < adapter->rx_queue_count; ++i) {
 981                 if (adapter->rrd_ring[i].rx_page) {
 982                         put_page(adapter->rrd_ring[i].rx_page);
 983                         adapter->rrd_ring[i].rx_page = NULL;
 984                 }
 985         }
 986 }
 987
 988 /**
 989  * atl1c_setup_ring_resources - allocate Tx / RX descriptor resources
 990  * @adapter: board private structure
 991  *
 992  * Return 0 on success, negative on failure
 993  */
 994 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 995 {
 996         struct pci_dev *pdev = adapter->pdev;
 997         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 998         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 999         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
1000         struct atl1c_ring_header *ring_header = &adapter->ring_header;
1001         int tqc = adapter->tx_queue_count;
1002         int rqc = adapter->rx_queue_count;
1003         int size;
1004         int i;
1005         int count = 0;
1006         u32 offset = 0;
1007
1008         /* Even though only one tpd queue is actually used, the "high"
1009          * priority tpd queue also gets initialized
1010          */
1011         if (tqc == 1)
1012                 tqc = 2;
1013
1014         for (i = 1; i < tqc; i++)
1015                 tpd_ring[i].count = tpd_ring[0].count;
1016
1017         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * tqc +
1018                                               rfd_ring->count * rqc);
1019         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
1020         if (unlikely(!tpd_ring->buffer_info))
1021                 goto err_nomem;
1022
1023         for (i = 0; i < tqc; i++) {
1024                 tpd_ring[i].adapter = adapter;
1025                 tpd_ring[i].num = i;
1026                 tpd_ring[i].buffer_info = (tpd_ring->buffer_info + count);
1027                 count += tpd_ring[i].count;
1028         }
1029
1030         for (i = 0; i < rqc; i++) {
1031                 rrd_ring[i].adapter = adapter;
1032                 rrd_ring[i].num = i;
1033                 rrd_ring[i].count = rfd_ring[0].count;
1034                 rfd_ring[i].count = rfd_ring[0].count;
1035                 rfd_ring[i].buffer_info = (tpd_ring->buffer_info + count);
1036                 count += rfd_ring->count;
1037         }
1038
1039         /*
1040          * real ring DMA buffer
1041          * each ring/block may need up to 8 bytes for alignment, hence the
1042          * additional bytes tacked onto the end.
1043          */
1044         ring_header->size =
1045                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * tqc +
1046                 sizeof(struct atl1c_rx_free_desc) * rfd_ring->count * rqc +
1047                 sizeof(struct atl1c_recv_ret_status) * rfd_ring->count * rqc +
1048                 8 * 4;
1049
1050         ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size,
1051                                                &ring_header->dma, GFP_KERNEL);
1052         if (unlikely(!ring_header->desc)) {
1053                 dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
1054                 goto err_nomem;
1055         }
1056         /* init TPD ring */
1057
1058         tpd_ring[0].dma = roundup(ring_header->dma, 8);
1059         offset = tpd_ring[0].dma - ring_header->dma;
1060         for (i = 0; i < tqc; i++) {
1061                 tpd_ring[i].dma = ring_header->dma + offset;
1062                 tpd_ring[i].desc = (u8 *)ring_header->desc + offset;
1063                 tpd_ring[i].size =
1064                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1065                 offset += roundup(tpd_ring[i].size, 8);
1066         }
1067         for (i = 0; i < rqc; i++) {
1068                 /* init RFD ring */
1069                 rfd_ring[i].dma = ring_header->dma + offset;
1070                 rfd_ring[i].desc = (u8 *)ring_header->desc + offset;
1071                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
1072                         rfd_ring[i].count;
1073                 offset += roundup(rfd_ring[i].size, 8);
1074
1075                 /* init RRD ring */
1076                 rrd_ring[i].dma = ring_header->dma + offset;
1077                 rrd_ring[i].desc = (u8 *)ring_header->desc + offset;
1078                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
1079                         rrd_ring[i].count;
1080                 offset += roundup(rrd_ring[i].size, 8);
1081         }
1082
1083         return 0;
1084
1085 err_nomem:
1086         kfree(tpd_ring->buffer_info);
1087         return -ENOMEM;
1088 }
1089
1090 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1091 {
1092         struct atl1c_hw *hw = &adapter->hw;
1093         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
1094         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
1095         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1096         int i;
1097         int tx_queue_count = adapter->tx_queue_count;
1098
1099         if (tx_queue_count == 1)
1100                 tx_queue_count = 2;
1101
1102         /* TPD */
1103         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1104                      (u32)((tpd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
1105         /* just enable normal priority TX queue */
1106         for (i = 0; i < tx_queue_count; i++) {
1107                 AT_WRITE_REG(hw, atl1c_qregs[i].tpd_addr_lo,
1108                              (u32)(tpd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1109         }
1110         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1111                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1112
1113
1114         /* RFD */
1115         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1116                      (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1117         for (i = 0; i < adapter->rx_queue_count; i++) {
1118                 AT_WRITE_REG(hw, atl1c_qregs[i].rfd_addr_lo,
1119                              (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1120         }
1121
1122         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1123                         rfd_ring->count & RFD_RING_SIZE_MASK);
1124         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1125                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1126
1127         /* RRD */
1128         for (i = 0; i < adapter->rx_queue_count; i++) {
1129                 AT_WRITE_REG(hw, atl1c_qregs[i].rrd_addr_lo,
1130                              (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1131         }
1132         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1133                         (rrd_ring->count & RRD_RING_SIZE_MASK));
1134
1135         if (hw->nic_type == athr_l2c_b) {
1136                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1137                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1138                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1139                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1140                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1141                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1142                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1143                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1144         }
1145         /* Load all of base address above */
1146         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1147 }
1148
1149 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1150 {
1151         struct atl1c_hw *hw = &adapter->hw;
1152         int max_pay_load;
1153         u16 tx_offload_thresh;
1154         u32 txq_ctrl_data;
1155
1156         tx_offload_thresh = MAX_TSO_FRAME_SIZE;
1157         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1158                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1159         max_pay_load = pcie_get_readrq(adapter->pdev) >> 8;
1160         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1161         /*
1162          * if BIOS had changed the dam-read-max-length to an invalid value,
1163          * restore it to default value
1164          */
1165         if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) {
1166                 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN);
1167                 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN;
1168         }
1169         txq_ctrl_data =
1170                 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ?
1171                 L2CB_TXQ_CFGV : L1C_TXQ_CFGV;
1172
1173         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1174 }
1175
1176 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1177 {
1178         struct atl1c_hw *hw = &adapter->hw;
1179         u32 rxq_ctrl_data;
1180
1181         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1182                         RXQ_RFD_BURST_NUM_SHIFT;
1183
1184         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1185                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1186
1187         /* aspm for gigabit */
1188         if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0)
1189                 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT,
1190                         ASPM_THRUPUT_LIMIT_100M);
1191
1192         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1193 }
1194
1195 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1196 {
1197         struct atl1c_hw *hw = &adapter->hw;
1198         u32 dma_ctrl_data;
1199
1200         dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) |
1201                 DMA_CTRL_RREQ_PRI_DATA |
1202                 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) |
1203                 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) |
1204                 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF);
1205
1206         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1207 }
1208
1209 /*
1210  * Stop the mac, transmit and receive units
1211  * hw - Struct containing variables accessed by shared code
1212  * return : 0  or  idle status (if error)
1213  */
1214 static int atl1c_stop_mac(struct atl1c_hw *hw)
1215 {
1216         u32 data;
1217
1218         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1219         data &= ~RXQ_CTRL_EN;
1220         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1221
1222         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1223         data &= ~TXQ_CTRL_EN;
1224         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1225
1226         atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY);
1227
1228         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1229         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1230         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1231
1232         return (int)atl1c_wait_until_idle(hw,
1233                 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY);
1234 }
1235
1236 static void atl1c_start_mac(struct atl1c_adapter *adapter)
1237 {
1238         struct atl1c_hw *hw = &adapter->hw;
1239         u32 mac, txq, rxq;
1240
1241         hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX;
1242         hw->mac_speed = adapter->link_speed == SPEED_1000 ?
1243                 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100;
1244
1245         AT_READ_REG(hw, REG_TXQ_CTRL, &txq);
1246         AT_READ_REG(hw, REG_RXQ_CTRL, &rxq);
1247         AT_READ_REG(hw, REG_MAC_CTRL, &mac);
1248
1249         txq |= TXQ_CTRL_EN;
1250         rxq |= RXQ_CTRL_EN;
1251         mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW |
1252                MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW |
1253                MAC_CTRL_ADD_CRC | MAC_CTRL_PAD |
1254                MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN |
1255                MAC_CTRL_HASH_ALG_CRC32;
1256         if (hw->mac_duplex)
1257                 mac |= MAC_CTRL_DUPLX;
1258         else
1259                 mac &= ~MAC_CTRL_DUPLX;
1260         mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed);
1261         mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len);
1262
1263         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq);
1264         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq);
1265         AT_WRITE_REG(hw, REG_MAC_CTRL, mac);
1266 }
1267
1268 /*
1269  * Reset the transmit and receive units; mask and clear all interrupts.
1270  * hw - Struct containing variables accessed by shared code
1271  * return : 0  or  idle status (if error)
1272  */
1273 static int atl1c_reset_mac(struct atl1c_hw *hw)
1274 {
1275         struct atl1c_adapter *adapter = hw->adapter;
1276         struct pci_dev *pdev = adapter->pdev;
1277         u32 ctrl_data = 0;
1278
1279         atl1c_stop_mac(hw);
1280         /*
1281          * Issue Soft Reset to the MAC.  This will reset the chip's
1282          * transmit, receive, DMA.  It will not effect
1283          * the current PCI configuration.  The global reset bit is self-
1284          * clearing, and should clear within a microsecond.
1285          */
1286         AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
1287         ctrl_data |= MASTER_CTRL_OOB_DIS;
1288         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
1289
1290         AT_WRITE_FLUSH(hw);
1291         msleep(10);
1292         /* Wait at least 10ms for All module to be Idle */
1293
1294         if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) {
1295                 dev_err(&pdev->dev,
1296                         "MAC state machine can't be idle since"
1297                         " disabled for 10ms second\n");
1298                 return -1;
1299         }
1300         AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
1301
1302         /* driver control speed/duplex */
1303         AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
1304         AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
1305
1306         /* clk switch setting */
1307         AT_READ_REG(hw, REG_SERDES, &ctrl_data);
1308         switch (hw->nic_type) {
1309         case athr_l2c_b:
1310                 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
1311                                 SERDES_MAC_CLK_SLOWDOWN);
1312                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1313                 break;
1314         case athr_l2c_b2:
1315         case athr_l1d_2:
1316                 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
1317                 AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
1318                 break;
1319         default:
1320                 break;
1321         }
1322
1323         return 0;
1324 }
1325
1326 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1327 {
1328         u16 ctrl_flags = hw->ctrl_flags;
1329
1330         hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT);
1331         atl1c_set_aspm(hw, SPEED_0);
1332         hw->ctrl_flags = ctrl_flags;
1333 }
1334
1335 /*
1336  * Set ASPM state.
1337  * Enable/disable L0s/L1 depend on link state.
1338  */
1339 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed)
1340 {
1341         u32 pm_ctrl_data;
1342         u32 link_l1_timer;
1343
1344         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1345         pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN |
1346                           PM_CTRL_ASPM_L0S_EN |
1347                           PM_CTRL_MAC_ASPM_CHK);
1348         /* L1 timer */
1349         if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1350                 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S;
1351                 link_l1_timer =
1352                         link_speed == SPEED_1000 || link_speed == SPEED_100 ?
1353                         L1D_PMCTRL_L1_ENTRY_TM_16US : 1;
1354                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1355                         L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer);
1356         } else {
1357                 link_l1_timer = hw->nic_type == athr_l2c_b ?
1358                         L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM;
1359                 if (link_speed != SPEED_1000 && link_speed != SPEED_100)
1360                         link_l1_timer = 1;
1361                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1362                         PM_CTRL_L1_ENTRY_TIMER, link_l1_timer);
1363         }
1364
1365         /* L0S/L1 enable */
1366         if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0)
1367                 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK;
1368         if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1369                 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK;
1370
1371         /* l2cb & l1d & l2cb2 & l1d2 */
1372         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1373             hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1374                 pm_ctrl_data = FIELD_SETX(pm_ctrl_data,
1375                         PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF);
1376                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER |
1377                                 PM_CTRL_SERDES_PD_EX_L1 |
1378                                 PM_CTRL_CLK_SWH_L1;
1379                 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1380                                   PM_CTRL_SERDES_PLL_L1_EN |
1381                                   PM_CTRL_SERDES_BUFS_RX_L1_EN |
1382                                   PM_CTRL_SA_DLY_EN |
1383                                   PM_CTRL_HOTRST);
1384                 /* disable l0s if link down or l2cb */
1385                 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b)
1386                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1387         } else { /* l1c */
1388                 pm_ctrl_data =
1389                         FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0);
1390                 if (link_speed != SPEED_0) {
1391                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN |
1392                                         PM_CTRL_SERDES_PLL_L1_EN |
1393                                         PM_CTRL_SERDES_BUFS_RX_L1_EN;
1394                         pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 |
1395                                           PM_CTRL_CLK_SWH_L1 |
1396                                           PM_CTRL_ASPM_L0S_EN |
1397                                           PM_CTRL_ASPM_L1_EN);
1398                 } else { /* link down */
1399                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1400                         pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN |
1401                                           PM_CTRL_SERDES_PLL_L1_EN |
1402                                           PM_CTRL_SERDES_BUFS_RX_L1_EN |
1403                                           PM_CTRL_ASPM_L0S_EN);
1404                 }
1405         }
1406         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1407
1408         return;
1409 }
1410
1411 /**
1412  * atl1c_configure_mac - Configure Transmit&Receive Unit after Reset
1413  * @adapter: board private structure
1414  *
1415  * Configure the Tx /Rx unit of the MAC after a reset.
1416  */
1417 static int atl1c_configure_mac(struct atl1c_adapter *adapter)
1418 {
1419         struct atl1c_hw *hw = &adapter->hw;
1420         u32 master_ctrl_data = 0;
1421         u32 intr_modrt_data;
1422         u32 data;
1423
1424         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1425         master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN |
1426                               MASTER_CTRL_RX_ITIMER_EN |
1427                               MASTER_CTRL_INT_RDCLR);
1428         /* clear interrupt status */
1429         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1430         /*  Clear any WOL status */
1431         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1432         /* set Interrupt Clear Timer
1433          * HW will enable self to assert interrupt event to system after
1434          * waiting x-time for software to notify it accept interrupt.
1435          */
1436
1437         data = CLK_GATING_EN_ALL;
1438         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1439                 if (hw->nic_type == athr_l2c_b)
1440                         data &= ~CLK_GATING_RXMAC_EN;
1441         } else
1442                 data = 0;
1443         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1444
1445         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1446                 hw->ict & INT_RETRIG_TIMER_MASK);
1447
1448         atl1c_configure_des_ring(adapter);
1449
1450         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1451                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1452                                         IRQ_MODRT_TX_TIMER_SHIFT;
1453                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1454                                         IRQ_MODRT_RX_TIMER_SHIFT;
1455                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1456                 master_ctrl_data |=
1457                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1458         }
1459
1460         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1461                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1462
1463         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1464         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1465
1466         AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1467                 hw->smb_timer & SMB_STAT_TIMER_MASK);
1468
1469         /* set MTU */
1470         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1471                         VLAN_HLEN + ETH_FCS_LEN);
1472
1473         atl1c_configure_tx(adapter);
1474         atl1c_configure_rx(adapter);
1475         atl1c_configure_dma(adapter);
1476
1477         return 0;
1478 }
1479
1480 static int atl1c_configure(struct atl1c_adapter *adapter)
1481 {
1482         struct net_device *netdev = adapter->netdev;
1483         int num;
1484         int i;
1485
1486         if (adapter->hw.nic_type == athr_mt) {
1487                 u32 mode;
1488
1489                 AT_READ_REG(&adapter->hw, REG_MT_MODE, &mode);
1490                 if (adapter->rx_queue_count == 4)
1491                         mode |= MT_MODE_4Q;
1492                 else
1493                         mode &= ~MT_MODE_4Q;
1494                 AT_WRITE_REG(&adapter->hw, REG_MT_MODE, mode);
1495         }
1496
1497         atl1c_init_ring_ptrs(adapter);
1498         atl1c_set_multi(netdev);
1499         atl1c_restore_vlan(adapter);
1500
1501         for (i = 0; i < adapter->rx_queue_count; ++i) {
1502                 num = atl1c_alloc_rx_buffer(adapter, i, false);
1503                 if (unlikely(num == 0))
1504                         return -ENOMEM;
1505         }
1506
1507         if (atl1c_configure_mac(adapter))
1508                 return -EIO;
1509
1510         return 0;
1511 }
1512
1513 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1514 {
1515         u16 hw_reg_addr = 0;
1516         unsigned long *stats_item = NULL;
1517         u32 data;
1518
1519         /* update rx status */
1520         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1521         stats_item  = &adapter->hw_stats.rx_ok;
1522         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1523                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1524                 *stats_item += data;
1525                 stats_item++;
1526                 hw_reg_addr += 4;
1527         }
1528 /* update tx status */
1529         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1530         stats_item  = &adapter->hw_stats.tx_ok;
1531         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1532                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1533                 *stats_item += data;
1534                 stats_item++;
1535                 hw_reg_addr += 4;
1536         }
1537 }
1538
1539 /**
1540  * atl1c_get_stats - Get System Network Statistics
1541  * @netdev: network interface device structure
1542  *
1543  * Returns the address of the device statistics structure.
1544  * The statistics are actually updated from the timer callback.
1545  */
1546 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1547 {
1548         struct atl1c_adapter *adapter = netdev_priv(netdev);
1549         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1550         struct net_device_stats *net_stats = &netdev->stats;
1551
1552         atl1c_update_hw_stats(adapter);
1553         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1554         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1555         net_stats->multicast  = hw_stats->rx_mcast;
1556         net_stats->collisions = hw_stats->tx_1_col +
1557                                 hw_stats->tx_2_col +
1558                                 hw_stats->tx_late_col +
1559                                 hw_stats->tx_abort_col;
1560
1561         net_stats->rx_errors  = hw_stats->rx_frag +
1562                                 hw_stats->rx_fcs_err +
1563                                 hw_stats->rx_len_err +
1564                                 hw_stats->rx_sz_ov +
1565                                 hw_stats->rx_rrd_ov +
1566                                 hw_stats->rx_align_err +
1567                                 hw_stats->rx_rxf_ov;
1568
1569         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1570         net_stats->rx_length_errors = hw_stats->rx_len_err;
1571         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1572         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1573         net_stats->rx_dropped       = hw_stats->rx_rrd_ov;
1574
1575         net_stats->tx_errors = hw_stats->tx_late_col +
1576                                hw_stats->tx_abort_col +
1577                                hw_stats->tx_underrun +
1578                                hw_stats->tx_trunc;
1579
1580         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1581         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1582         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1583
1584         net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors;
1585         net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors;
1586
1587         return net_stats;
1588 }
1589
1590 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1591 {
1592         u16 phy_data;
1593
1594         spin_lock(&adapter->mdio_lock);
1595         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1596         spin_unlock(&adapter->mdio_lock);
1597 }
1598
1599 static int atl1c_clean_tx(struct napi_struct *napi, int budget)
1600 {
1601         struct atl1c_tpd_ring *tpd_ring =
1602                 container_of(napi, struct atl1c_tpd_ring, napi);
1603         struct atl1c_adapter *adapter = tpd_ring->adapter;
1604         struct netdev_queue *txq =
1605                 netdev_get_tx_queue(napi->dev, tpd_ring->num);
1606         struct atl1c_buffer *buffer_info;
1607         struct pci_dev *pdev = adapter->pdev;
1608         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1609         u16 hw_next_to_clean;
1610         unsigned int total_bytes = 0, total_packets = 0;
1611         unsigned long flags;
1612
1613         AT_READ_REGW(&adapter->hw, atl1c_qregs[tpd_ring->num].tpd_cons,
1614                      &hw_next_to_clean);
1615
1616         while (next_to_clean != hw_next_to_clean) {
1617                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1618                 if (buffer_info->skb) {
1619                         total_bytes += buffer_info->skb->len;
1620                         total_packets++;
1621                 }
1622                 atl1c_clean_buffer(pdev, buffer_info);
1623                 if (++next_to_clean == tpd_ring->count)
1624                         next_to_clean = 0;
1625                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1626         }
1627
1628         netdev_tx_completed_queue(txq, total_packets, total_bytes);
1629
1630         if (netif_tx_queue_stopped(txq) && netif_carrier_ok(adapter->netdev))
1631                 netif_tx_wake_queue(txq);
1632
1633         if (total_packets < budget) {
1634                 napi_complete_done(napi, total_packets);
1635                 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1636                 adapter->hw.intr_mask |= atl1c_qregs[tpd_ring->num].tx_isr;
1637                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1638                 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
1639                 return total_packets;
1640         }
1641         return budget;
1642 }
1643
1644 static void atl1c_intr_rx_tx(struct atl1c_adapter *adapter, u32 status)
1645 {
1646         struct atl1c_hw *hw = &adapter->hw;
1647         u32 intr_mask;
1648         int i;
1649
1650         spin_lock(&hw->intr_mask_lock);
1651         intr_mask = hw->intr_mask;
1652         for (i = 0; i < adapter->rx_queue_count; ++i) {
1653                 if (!(status & atl1c_qregs[i].rx_isr))
1654                         continue;
1655                 if (napi_schedule_prep(&adapter->rrd_ring[i].napi)) {
1656                         intr_mask &= ~atl1c_qregs[i].rx_isr;
1657                         __napi_schedule(&adapter->rrd_ring[i].napi);
1658                 }
1659         }
1660         for (i = 0; i < adapter->tx_queue_count; ++i) {
1661                 if (!(status & atl1c_qregs[i].tx_isr))
1662                         continue;
1663                 if (napi_schedule_prep(&adapter->tpd_ring[i].napi)) {
1664                         intr_mask &= ~atl1c_qregs[i].tx_isr;
1665                         __napi_schedule(&adapter->tpd_ring[i].napi);
1666                 }
1667         }
1668
1669         if (hw->intr_mask != intr_mask) {
1670                 hw->intr_mask = intr_mask;
1671                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1672         }
1673         spin_unlock(&hw->intr_mask_lock);
1674 }
1675
1676 /**
1677  * atl1c_intr - Interrupt Handler
1678  * @irq: interrupt number
1679  * @data: pointer to a network interface device structure
1680  */
1681 static irqreturn_t atl1c_intr(int irq, void *data)
1682 {
1683         struct net_device *netdev  = data;
1684         struct atl1c_adapter *adapter = netdev_priv(netdev);
1685         struct pci_dev *pdev = adapter->pdev;
1686         struct atl1c_hw *hw = &adapter->hw;
1687         int max_ints = AT_MAX_INT_WORK;
1688         int handled = IRQ_NONE;
1689         u32 status;
1690         u32 reg_data;
1691
1692         do {
1693                 AT_READ_REG(hw, REG_ISR, &reg_data);
1694                 status = reg_data & hw->intr_mask;
1695
1696                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1697                         if (max_ints != AT_MAX_INT_WORK)
1698                                 handled = IRQ_HANDLED;
1699                         break;
1700                 }
1701                 /* link event */
1702                 if (status & ISR_GPHY)
1703                         atl1c_clear_phy_int(adapter);
1704                 /* Ack ISR */
1705                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1706                 if (status & (ISR_RX_PKT | ISR_TX_PKT))
1707                         atl1c_intr_rx_tx(adapter, status);
1708
1709                 handled = IRQ_HANDLED;
1710                 /* check if PCIE PHY Link down */
1711                 if (status & ISR_ERROR) {
1712                         if (netif_msg_hw(adapter))
1713                                 dev_err(&pdev->dev,
1714                                         "atl1c hardware error (status = 0x%x)\n",
1715                                         status & ISR_ERROR);
1716                         /* reset MAC */
1717                         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
1718                         schedule_work(&adapter->common_task);
1719                         return IRQ_HANDLED;
1720                 }
1721
1722                 if (status & ISR_OVER)
1723                         if (netif_msg_intr(adapter))
1724                                 dev_warn(&pdev->dev,
1725                                         "TX/RX overflow (status = 0x%x)\n",
1726                                         status & ISR_OVER);
1727
1728                 /* link event */
1729                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1730                         netdev->stats.tx_carrier_errors++;
1731                         atl1c_link_chg_event(adapter);
1732                         break;
1733                 }
1734
1735         } while (--max_ints > 0);
1736         /* re-enable Interrupt*/
1737         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1738         return handled;
1739 }
1740
1741 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1742                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1743 {
1744         if (adapter->hw.nic_type == athr_mt) {
1745                 if (prrs->word3 & RRS_MT_PROT_ID_TCPUDP)
1746                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1747                 return;
1748         }
1749         /*
1750          * The pid field in RRS in not correct sometimes, so we
1751          * cannot figure out if the packet is fragmented or not,
1752          * so we tell the KERNEL CHECKSUM_NONE
1753          */
1754         skb_checksum_none_assert(skb);
1755 }
1756
1757 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter,
1758                                        u32 queue, bool napi_mode)
1759 {
1760         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[queue];
1761         struct sk_buff *skb;
1762         struct page *page;
1763
1764         if (adapter->rx_frag_size > PAGE_SIZE) {
1765                 if (likely(napi_mode))
1766                         return napi_alloc_skb(&rrd_ring->napi,
1767                                               adapter->rx_buffer_len);
1768                 else
1769                         return netdev_alloc_skb_ip_align(adapter->netdev,
1770                                                          adapter->rx_buffer_len);
1771         }
1772
1773         page = rrd_ring->rx_page;
1774         if (!page) {
1775                 page = alloc_page(GFP_ATOMIC);
1776                 if (unlikely(!page))
1777                         return NULL;
1778                 rrd_ring->rx_page = page;
1779                 rrd_ring->rx_page_offset = 0;
1780         }
1781
1782         skb = build_skb(page_address(page) + rrd_ring->rx_page_offset,
1783                         adapter->rx_frag_size);
1784         if (likely(skb)) {
1785                 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
1786                 rrd_ring->rx_page_offset += adapter->rx_frag_size;
1787                 if (rrd_ring->rx_page_offset >= PAGE_SIZE)
1788                         rrd_ring->rx_page = NULL;
1789                 else
1790                         get_page(page);
1791         }
1792         return skb;
1793 }
1794
1795 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, u32 queue,
1796                                  bool napi_mode)
1797 {
1798         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[queue];
1799         struct pci_dev *pdev = adapter->pdev;
1800         struct atl1c_buffer *buffer_info, *next_info;
1801         struct sk_buff *skb;
1802         void *vir_addr = NULL;
1803         u16 num_alloc = 0;
1804         u16 rfd_next_to_use, next_next;
1805         struct atl1c_rx_free_desc *rfd_desc;
1806         dma_addr_t mapping;
1807
1808         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1809         if (++next_next == rfd_ring->count)
1810                 next_next = 0;
1811         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1812         next_info = &rfd_ring->buffer_info[next_next];
1813
1814         while (next_info->flags & ATL1C_BUFFER_FREE) {
1815                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1816
1817                 skb = atl1c_alloc_skb(adapter, queue, napi_mode);
1818                 if (unlikely(!skb)) {
1819                         if (netif_msg_rx_err(adapter))
1820                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1821                         break;
1822                 }
1823
1824                 /*
1825                  * Make buffer alignment 2 beyond a 16 byte boundary
1826                  * this will result in a 16 byte aligned IP header after
1827                  * the 14 byte MAC header is removed
1828                  */
1829                 vir_addr = skb->data;
1830                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1831                 buffer_info->skb = skb;
1832                 buffer_info->length = adapter->rx_buffer_len;
1833                 mapping = dma_map_single(&pdev->dev, vir_addr,
1834                                          buffer_info->length, DMA_FROM_DEVICE);
1835                 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) {
1836                         dev_kfree_skb(skb);
1837                         buffer_info->skb = NULL;
1838                         buffer_info->length = 0;
1839                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
1840                         netif_warn(adapter, rx_err, adapter->netdev, "RX dma_map_single failed");
1841                         break;
1842                 }
1843                 buffer_info->dma = mapping;
1844                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1845                         ATL1C_PCIMAP_FROMDEVICE);
1846                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1847                 rfd_next_to_use = next_next;
1848                 if (++next_next == rfd_ring->count)
1849                         next_next = 0;
1850                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1851                 next_info = &rfd_ring->buffer_info[next_next];
1852                 num_alloc++;
1853         }
1854
1855         if (num_alloc) {
1856                 /* TODO: update mailbox here */
1857                 wmb();
1858                 rfd_ring->next_to_use = rfd_next_to_use;
1859                 AT_WRITE_REG(&adapter->hw, atl1c_qregs[queue].rfd_prod,
1860                              rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1861         }
1862
1863         return num_alloc;
1864 }
1865
1866 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1867                         struct  atl1c_recv_ret_status *rrs, u16 num)
1868 {
1869         u16 i;
1870         /* the relationship between rrd and rfd is one map one */
1871         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1872                                         rrd_ring->next_to_clean)) {
1873                 rrs->word3 &= ~RRS_RXD_UPDATED;
1874                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1875                         rrd_ring->next_to_clean = 0;
1876         }
1877 }
1878
1879 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1880         struct atl1c_recv_ret_status *rrs, u16 num)
1881 {
1882         u16 i;
1883         u16 rfd_index;
1884         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1885
1886         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1887                         RRS_RX_RFD_INDEX_MASK;
1888         for (i = 0; i < num; i++) {
1889                 buffer_info[rfd_index].skb = NULL;
1890                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1891                                         ATL1C_BUFFER_FREE);
1892                 if (++rfd_index == rfd_ring->count)
1893                         rfd_index = 0;
1894         }
1895         rfd_ring->next_to_clean = rfd_index;
1896 }
1897
1898 /**
1899  * atl1c_clean_rx - NAPI Rx polling callback
1900  * @napi: napi info
1901  * @budget: limit of packets to clean
1902  */
1903 static int atl1c_clean_rx(struct napi_struct *napi, int budget)
1904 {
1905         struct atl1c_rrd_ring *rrd_ring =
1906                 container_of(napi, struct atl1c_rrd_ring, napi);
1907         struct atl1c_adapter *adapter = rrd_ring->adapter;
1908         u16 rfd_num, rfd_index;
1909         u16 length;
1910         struct pci_dev *pdev = adapter->pdev;
1911         struct net_device *netdev  = adapter->netdev;
1912         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[rrd_ring->num];
1913         struct sk_buff *skb;
1914         struct atl1c_recv_ret_status *rrs;
1915         struct atl1c_buffer *buffer_info;
1916         int work_done = 0;
1917         unsigned long flags;
1918
1919         /* Keep link state information with original netdev */
1920         if (!netif_carrier_ok(adapter->netdev))
1921                 goto quit_polling;
1922
1923         while (1) {
1924                 if (work_done >= budget)
1925                         break;
1926                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1927                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1928                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1929                                 RRS_RX_RFD_CNT_MASK;
1930                         if (unlikely(rfd_num != 1))
1931                                 /* TODO support mul rfd*/
1932                                 if (netif_msg_rx_err(adapter))
1933                                         dev_warn(&pdev->dev,
1934                                                 "Multi rfd not support yet!\n");
1935                         goto rrs_checked;
1936                 } else {
1937                         break;
1938                 }
1939 rrs_checked:
1940                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1941                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1942                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1943                         if (netif_msg_rx_err(adapter))
1944                                 dev_warn(&pdev->dev,
1945                                          "wrong packet! rrs word3 is %x\n",
1946                                          rrs->word3);
1947                         continue;
1948                 }
1949
1950                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1951                                 RRS_PKT_SIZE_MASK);
1952                 /* Good Receive */
1953                 if (likely(rfd_num == 1)) {
1954                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1955                                         RRS_RX_RFD_INDEX_MASK;
1956                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1957                         dma_unmap_single(&pdev->dev, buffer_info->dma,
1958                                          buffer_info->length, DMA_FROM_DEVICE);
1959                         skb = buffer_info->skb;
1960                 } else {
1961                         /* TODO */
1962                         if (netif_msg_rx_err(adapter))
1963                                 dev_warn(&pdev->dev,
1964                                         "Multi rfd not support yet!\n");
1965                         break;
1966                 }
1967                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1968                 skb_put(skb, length - ETH_FCS_LEN);
1969                 skb->protocol = eth_type_trans(skb, netdev);
1970                 atl1c_rx_checksum(adapter, skb, rrs);
1971                 if (rrs->word3 & RRS_VLAN_INS) {
1972                         u16 vlan;
1973
1974                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1975                         vlan = le16_to_cpu(vlan);
1976                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
1977                 }
1978                 napi_gro_receive(napi, skb);
1979
1980                 work_done++;
1981         }
1982         if (work_done)
1983                 atl1c_alloc_rx_buffer(adapter, rrd_ring->num, true);
1984
1985         if (work_done < budget) {
1986 quit_polling:
1987                 napi_complete_done(napi, work_done);
1988                 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags);
1989                 adapter->hw.intr_mask |= atl1c_qregs[rrd_ring->num].rx_isr;
1990                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1991                 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags);
1992         }
1993         return work_done;
1994 }
1995
1996 #ifdef CONFIG_NET_POLL_CONTROLLER
1997
1998 /*
1999  * Polling 'interrupt' - used by things like netconsole to send skbs
2000  * without having to re-enable interrupts. It's not called while
2001  * the interrupt routine is executing.
2002  */
2003 static void atl1c_netpoll(struct net_device *netdev)
2004 {
2005         struct atl1c_adapter *adapter = netdev_priv(netdev);
2006
2007         disable_irq(adapter->pdev->irq);
2008         atl1c_intr(adapter->pdev->irq, netdev);
2009         enable_irq(adapter->pdev->irq);
2010 }
2011 #endif
2012
2013 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, u32 queue)
2014 {
2015         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2016         u16 next_to_use = 0;
2017         u16 next_to_clean = 0;
2018
2019         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
2020         next_to_use   = tpd_ring->next_to_use;
2021
2022         return (u16)(next_to_clean > next_to_use) ?
2023                 (next_to_clean - next_to_use - 1) :
2024                 (tpd_ring->count + next_to_clean - next_to_use - 1);
2025 }
2026
2027 /*
2028  * get next usable tpd
2029  * Note: should call atl1c_tdp_avail to make sure
2030  * there is enough tpd to use
2031  */
2032 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
2033                                             u32 queue)
2034 {
2035         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2036         struct atl1c_tpd_desc *tpd_desc;
2037         u16 next_to_use = 0;
2038
2039         next_to_use = tpd_ring->next_to_use;
2040         if (++tpd_ring->next_to_use == tpd_ring->count)
2041                 tpd_ring->next_to_use = 0;
2042         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
2043         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
2044         return  tpd_desc;
2045 }
2046
2047 static struct atl1c_buffer *
2048 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
2049 {
2050         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
2051
2052         return &tpd_ring->buffer_info[tpd -
2053                         (struct atl1c_tpd_desc *)tpd_ring->desc];
2054 }
2055
2056 /* Calculate the transmit packet descript needed*/
2057 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
2058 {
2059         u16 tpd_req;
2060         u16 proto_hdr_len = 0;
2061
2062         tpd_req = skb_shinfo(skb)->nr_frags + 1;
2063
2064         if (skb_is_gso(skb)) {
2065                 proto_hdr_len = skb_tcp_all_headers(skb);
2066                 if (proto_hdr_len < skb_headlen(skb))
2067                         tpd_req++;
2068                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
2069                         tpd_req++;
2070         }
2071         return tpd_req;
2072 }
2073
2074 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
2075                           struct sk_buff *skb,
2076                           struct atl1c_tpd_desc **tpd,
2077                           u32 queue)
2078 {
2079         struct pci_dev *pdev = adapter->pdev;
2080         unsigned short offload_type;
2081         u8 hdr_len;
2082         u32 real_len;
2083
2084         if (skb_is_gso(skb)) {
2085                 int err;
2086
2087                 err = skb_cow_head(skb, 0);
2088                 if (err < 0)
2089                         return err;
2090
2091                 offload_type = skb_shinfo(skb)->gso_type;
2092
2093                 if (offload_type & SKB_GSO_TCPV4) {
2094                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2095                                         + ntohs(ip_hdr(skb)->tot_len));
2096
2097                         if (real_len < skb->len) {
2098                                 err = pskb_trim(skb, real_len);
2099                                 if (err)
2100                                         return err;
2101                         }
2102
2103                         hdr_len = skb_tcp_all_headers(skb);
2104                         if (unlikely(skb->len == hdr_len)) {
2105                                 /* only xsum need */
2106                                 if (netif_msg_tx_queued(adapter))
2107                                         dev_warn(&pdev->dev,
2108                                                 "IPV4 tso with zero data??\n");
2109                                 goto check_sum;
2110                         } else {
2111                                 ip_hdr(skb)->check = 0;
2112                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2113                                                         ip_hdr(skb)->saddr,
2114                                                         ip_hdr(skb)->daddr,
2115                                                         0, IPPROTO_TCP, 0);
2116                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2117                         }
2118                 }
2119
2120                 if (offload_type & SKB_GSO_TCPV6) {
2121                         struct atl1c_tpd_ext_desc *etpd =
2122                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2123
2124                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2125                         *tpd = atl1c_get_tpd(adapter, queue);
2126                         ipv6_hdr(skb)->payload_len = 0;
2127                         /* check payload == 0 byte ? */
2128                         hdr_len = skb_tcp_all_headers(skb);
2129                         if (unlikely(skb->len == hdr_len)) {
2130                                 /* only xsum need */
2131                                 if (netif_msg_tx_queued(adapter))
2132                                         dev_warn(&pdev->dev,
2133                                                 "IPV6 tso with zero data??\n");
2134                                 goto check_sum;
2135                         } else
2136                                 tcp_v6_gso_csum_prep(skb);
2137
2138                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2139                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2140                         etpd->pkt_len = cpu_to_le32(skb->len);
2141                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2142                 }
2143
2144                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2145                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2146                                 TPD_TCPHDR_OFFSET_SHIFT;
2147                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2148                                 TPD_MSS_SHIFT;
2149                 return 0;
2150         }
2151
2152 check_sum:
2153         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2154                 u8 css, cso;
2155                 cso = skb_checksum_start_offset(skb);
2156
2157                 if (unlikely(cso & 0x1)) {
2158                         if (netif_msg_tx_err(adapter))
2159                                 dev_err(&adapter->pdev->dev,
2160                                         "payload offset should not an event number\n");
2161                         return -1;
2162                 } else {
2163                         css = cso + skb->csum_offset;
2164
2165                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2166                                         TPD_PLOADOFFSET_SHIFT;
2167                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2168                                         TPD_CCSUM_OFFSET_SHIFT;
2169                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2170                 }
2171         }
2172         return 0;
2173 }
2174
2175 static void atl1c_tx_rollback(struct atl1c_adapter *adpt,
2176                               struct atl1c_tpd_desc *first_tpd,
2177                               u32 queue)
2178 {
2179         struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[queue];
2180         struct atl1c_buffer *buffer_info;
2181         struct atl1c_tpd_desc *tpd;
2182         u16 first_index, index;
2183
2184         first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc;
2185         index = first_index;
2186         while (index != tpd_ring->next_to_use) {
2187                 tpd = ATL1C_TPD_DESC(tpd_ring, index);
2188                 buffer_info = &tpd_ring->buffer_info[index];
2189                 atl1c_clean_buffer(adpt->pdev, buffer_info);
2190                 memset(tpd, 0, sizeof(struct atl1c_tpd_desc));
2191                 if (++index == tpd_ring->count)
2192                         index = 0;
2193         }
2194         tpd_ring->next_to_use = first_index;
2195 }
2196
2197 static int atl1c_tx_map(struct atl1c_adapter *adapter,
2198                         struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2199                         u32 queue)
2200 {
2201         struct atl1c_tpd_desc *use_tpd = NULL;
2202         struct atl1c_buffer *buffer_info = NULL;
2203         u16 buf_len = skb_headlen(skb);
2204         u16 map_len = 0;
2205         u16 mapped_len = 0;
2206         u16 hdr_len = 0;
2207         u16 nr_frags;
2208         u16 f;
2209         int tso;
2210
2211         nr_frags = skb_shinfo(skb)->nr_frags;
2212         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2213         if (tso) {
2214                 /* TSO */
2215                 hdr_len = skb_tcp_all_headers(skb);
2216                 map_len = hdr_len;
2217                 use_tpd = tpd;
2218
2219                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2220                 buffer_info->length = map_len;
2221                 buffer_info->dma = dma_map_single(&adapter->pdev->dev,
2222                                                   skb->data, hdr_len,
2223                                                   DMA_TO_DEVICE);
2224                 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2225                         goto err_dma;
2226                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2227                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2228                         ATL1C_PCIMAP_TODEVICE);
2229                 mapped_len += map_len;
2230                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2231                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2232         }
2233
2234         if (mapped_len < buf_len) {
2235                 /* mapped_len == 0, means we should use the first tpd,
2236                    which is given by caller  */
2237                 if (mapped_len == 0)
2238                         use_tpd = tpd;
2239                 else {
2240                         use_tpd = atl1c_get_tpd(adapter, queue);
2241                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2242                 }
2243                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2244                 buffer_info->length = buf_len - mapped_len;
2245                 buffer_info->dma =
2246                         dma_map_single(&adapter->pdev->dev,
2247                                        skb->data + mapped_len,
2248                                        buffer_info->length, DMA_TO_DEVICE);
2249                 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)))
2250                         goto err_dma;
2251
2252                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2253                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2254                         ATL1C_PCIMAP_TODEVICE);
2255                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2256                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2257         }
2258
2259         for (f = 0; f < nr_frags; f++) {
2260                 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2261
2262                 use_tpd = atl1c_get_tpd(adapter, queue);
2263                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2264
2265                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2266                 buffer_info->length = skb_frag_size(frag);
2267                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2268                                                     frag, 0,
2269                                                     buffer_info->length,
2270                                                     DMA_TO_DEVICE);
2271                 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))
2272                         goto err_dma;
2273
2274                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2275                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2276                         ATL1C_PCIMAP_TODEVICE);
2277                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2278                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2279         }
2280
2281         /* The last tpd */
2282         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2283         /* The last buffer info contain the skb address,
2284            so it will be free after unmap */
2285         buffer_info->skb = skb;
2286
2287         return 0;
2288
2289 err_dma:
2290         buffer_info->dma = 0;
2291         buffer_info->length = 0;
2292         return -1;
2293 }
2294
2295 static void atl1c_tx_queue(struct atl1c_adapter *adapter, u32 queue)
2296 {
2297         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[queue];
2298
2299         AT_WRITE_REGW(&adapter->hw, atl1c_qregs[queue].tpd_prod,
2300                       tpd_ring->next_to_use);
2301 }
2302
2303 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2304                                           struct net_device *netdev)
2305 {
2306         struct atl1c_adapter *adapter = netdev_priv(netdev);
2307         u32 queue = skb_get_queue_mapping(skb);
2308         struct netdev_queue *txq = netdev_get_tx_queue(netdev, queue);
2309         struct atl1c_tpd_desc *tpd;
2310         u16 tpd_req;
2311
2312         if (test_bit(__AT_DOWN, &adapter->flags)) {
2313                 dev_kfree_skb_any(skb);
2314                 return NETDEV_TX_OK;
2315         }
2316
2317         tpd_req = atl1c_cal_tpd_req(skb);
2318
2319         if (atl1c_tpd_avail(adapter, queue) < tpd_req) {
2320                 /* no enough descriptor, just stop queue */
2321                 atl1c_tx_queue(adapter, queue);
2322                 netif_tx_stop_queue(txq);
2323                 return NETDEV_TX_BUSY;
2324         }
2325
2326         tpd = atl1c_get_tpd(adapter, queue);
2327
2328         /* do TSO and check sum */
2329         if (atl1c_tso_csum(adapter, skb, &tpd, queue) != 0) {
2330                 atl1c_tx_queue(adapter, queue);
2331                 dev_kfree_skb_any(skb);
2332                 return NETDEV_TX_OK;
2333         }
2334
2335         if (unlikely(skb_vlan_tag_present(skb))) {
2336                 u16 vlan = skb_vlan_tag_get(skb);
2337                 __le16 tag;
2338
2339                 vlan = cpu_to_le16(vlan);
2340                 AT_VLAN_TO_TAG(vlan, tag);
2341                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2342                 tpd->vlan_tag = tag;
2343         }
2344
2345         if (skb_network_offset(skb) != ETH_HLEN)
2346                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2347
2348         if (atl1c_tx_map(adapter, skb, tpd, queue) < 0) {
2349                 netif_info(adapter, tx_done, adapter->netdev,
2350                            "tx-skb dropped due to dma error\n");
2351                 /* roll back tpd/buffer */
2352                 atl1c_tx_rollback(adapter, tpd, queue);
2353                 dev_kfree_skb_any(skb);
2354         } else {
2355                 bool more = netdev_xmit_more();
2356
2357                 if (__netdev_tx_sent_queue(txq, skb->len, more))
2358                         atl1c_tx_queue(adapter, queue);
2359         }
2360
2361         return NETDEV_TX_OK;
2362 }
2363
2364 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2365 {
2366         struct net_device *netdev = adapter->netdev;
2367
2368         free_irq(adapter->pdev->irq, netdev);
2369
2370         if (adapter->have_msi)
2371                 pci_disable_msi(adapter->pdev);
2372 }
2373
2374 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2375 {
2376         struct pci_dev    *pdev   = adapter->pdev;
2377         struct net_device *netdev = adapter->netdev;
2378         int flags = 0;
2379         int err = 0;
2380
2381         adapter->have_msi = true;
2382         err = pci_enable_msi(adapter->pdev);
2383         if (err) {
2384                 if (netif_msg_ifup(adapter))
2385                         dev_err(&pdev->dev,
2386                                 "Unable to allocate MSI interrupt Error: %d\n",
2387                                 err);
2388                 adapter->have_msi = false;
2389         }
2390
2391         if (!adapter->have_msi)
2392                 flags |= IRQF_SHARED;
2393         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2394                         netdev->name, netdev);
2395         if (err) {
2396                 if (netif_msg_ifup(adapter))
2397                         dev_err(&pdev->dev,
2398                                 "Unable to allocate interrupt Error: %d\n",
2399                                 err);
2400                 if (adapter->have_msi)
2401                         pci_disable_msi(adapter->pdev);
2402                 return err;
2403         }
2404         if (netif_msg_ifup(adapter))
2405                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2406         return err;
2407 }
2408
2409
2410 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter)
2411 {
2412         int i;
2413         /* release tx-pending skbs and reset tx/rx ring index */
2414         for (i = 0; i < adapter->tx_queue_count; ++i)
2415                 atl1c_clean_tx_ring(adapter, i);
2416         for (i = 0; i < adapter->rx_queue_count; ++i)
2417                 atl1c_clean_rx_ring(adapter, i);
2418 }
2419
2420 static int atl1c_up(struct atl1c_adapter *adapter)
2421 {
2422         struct net_device *netdev = adapter->netdev;
2423         int err;
2424         int i;
2425
2426         netif_carrier_off(netdev);
2427
2428         err = atl1c_configure(adapter);
2429         if (unlikely(err))
2430                 goto err_up;
2431
2432         err = atl1c_request_irq(adapter);
2433         if (unlikely(err))
2434                 goto err_up;
2435
2436         atl1c_check_link_status(adapter);
2437         clear_bit(__AT_DOWN, &adapter->flags);
2438         for (i = 0; i < adapter->tx_queue_count; ++i)
2439                 napi_enable(&adapter->tpd_ring[i].napi);
2440         for (i = 0; i < adapter->rx_queue_count; ++i)
2441                 napi_enable(&adapter->rrd_ring[i].napi);
2442         atl1c_irq_enable(adapter);
2443         netif_start_queue(netdev);
2444         return err;
2445
2446 err_up:
2447         for (i = 0; i < adapter->rx_queue_count; ++i)
2448                 atl1c_clean_rx_ring(adapter, i);
2449         return err;
2450 }
2451
2452 static void atl1c_down(struct atl1c_adapter *adapter)
2453 {
2454         struct net_device *netdev = adapter->netdev;
2455         int i;
2456
2457         atl1c_del_timer(adapter);
2458         adapter->work_event = 0; /* clear all event */
2459         /* signal that we're down so the interrupt handler does not
2460          * reschedule our watchdog timer */
2461         set_bit(__AT_DOWN, &adapter->flags);
2462         netif_carrier_off(netdev);
2463         for (i = 0; i < adapter->tx_queue_count; ++i)
2464                 napi_disable(&adapter->tpd_ring[i].napi);
2465         for (i = 0; i < adapter->rx_queue_count; ++i)
2466                 napi_disable(&adapter->rrd_ring[i].napi);
2467         atl1c_irq_disable(adapter);
2468         atl1c_free_irq(adapter);
2469         /* disable ASPM if device inactive */
2470         atl1c_disable_l0s_l1(&adapter->hw);
2471         /* reset MAC to disable all RX/TX */
2472         atl1c_reset_mac(&adapter->hw);
2473         msleep(1);
2474
2475         adapter->link_speed = SPEED_0;
2476         adapter->link_duplex = -1;
2477         atl1c_reset_dma_ring(adapter);
2478 }
2479
2480 /**
2481  * atl1c_open - Called when a network interface is made active
2482  * @netdev: network interface device structure
2483  *
2484  * Returns 0 on success, negative value on failure
2485  *
2486  * The open entry point is called when a network interface is made
2487  * active by the system (IFF_UP).  At this point all resources needed
2488  * for transmit and receive operations are allocated, the interrupt
2489  * handler is registered with the OS, the watchdog timer is started,
2490  * and the stack is notified that the interface is ready.
2491  */
2492 static int atl1c_open(struct net_device *netdev)
2493 {
2494         struct atl1c_adapter *adapter = netdev_priv(netdev);
2495         int err;
2496
2497         /* disallow open during test */
2498         if (test_bit(__AT_TESTING, &adapter->flags))
2499                 return -EBUSY;
2500
2501         /* allocate rx/tx dma buffer & descriptors */
2502         err = atl1c_setup_ring_resources(adapter);
2503         if (unlikely(err))
2504                 return err;
2505
2506         err = atl1c_up(adapter);
2507         if (unlikely(err))
2508                 goto err_up;
2509
2510         return 0;
2511
2512 err_up:
2513         atl1c_free_irq(adapter);
2514         atl1c_free_ring_resources(adapter);
2515         atl1c_reset_mac(&adapter->hw);
2516         return err;
2517 }
2518
2519 /**
2520  * atl1c_close - Disables a network interface
2521  * @netdev: network interface device structure
2522  *
2523  * Returns 0, this is not allowed to fail
2524  *
2525  * The close entry point is called when an interface is de-activated
2526  * by the OS.  The hardware is still under the drivers control, but
2527  * needs to be disabled.  A global MAC reset is issued to stop the
2528  * hardware, and all transmit and receive resources are freed.
2529  */
2530 static int atl1c_close(struct net_device *netdev)
2531 {
2532         struct atl1c_adapter *adapter = netdev_priv(netdev);
2533
2534         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2535         set_bit(__AT_DOWN, &adapter->flags);
2536         cancel_work_sync(&adapter->common_task);
2537         atl1c_down(adapter);
2538         atl1c_free_ring_resources(adapter);
2539         return 0;
2540 }
2541
2542 static int atl1c_suspend(struct device *dev)
2543 {
2544         struct net_device *netdev = dev_get_drvdata(dev);
2545         struct atl1c_adapter *adapter = netdev_priv(netdev);
2546         struct atl1c_hw *hw = &adapter->hw;
2547         u32 wufc = adapter->wol;
2548
2549         atl1c_disable_l0s_l1(hw);
2550         if (netif_running(netdev)) {
2551                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2552                 atl1c_down(adapter);
2553         }
2554         netif_device_detach(netdev);
2555
2556         if (wufc)
2557                 if (atl1c_phy_to_ps_link(hw) != 0)
2558                         dev_dbg(dev, "phy power saving failed");
2559
2560         atl1c_power_saving(hw, wufc);
2561
2562         return 0;
2563 }
2564
2565 #ifdef CONFIG_PM_SLEEP
2566 static int atl1c_resume(struct device *dev)
2567 {
2568         struct net_device *netdev = dev_get_drvdata(dev);
2569         struct atl1c_adapter *adapter = netdev_priv(netdev);
2570
2571         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2572         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2573
2574         atl1c_phy_reset(&adapter->hw);
2575         atl1c_reset_mac(&adapter->hw);
2576         atl1c_phy_init(&adapter->hw);
2577
2578         netif_device_attach(netdev);
2579         if (netif_running(netdev))
2580                 atl1c_up(adapter);
2581
2582         return 0;
2583 }
2584 #endif
2585
2586 static void atl1c_shutdown(struct pci_dev *pdev)
2587 {
2588         struct net_device *netdev = pci_get_drvdata(pdev);
2589         struct atl1c_adapter *adapter = netdev_priv(netdev);
2590
2591         atl1c_suspend(&pdev->dev);
2592         pci_wake_from_d3(pdev, adapter->wol);
2593         pci_set_power_state(pdev, PCI_D3hot);
2594 }
2595
2596 static const struct net_device_ops atl1c_netdev_ops = {
2597         .ndo_open               = atl1c_open,
2598         .ndo_stop               = atl1c_close,
2599         .ndo_validate_addr      = eth_validate_addr,
2600         .ndo_start_xmit         = atl1c_xmit_frame,
2601         .ndo_set_mac_address    = atl1c_set_mac_addr,
2602         .ndo_set_rx_mode        = atl1c_set_multi,
2603         .ndo_change_mtu         = atl1c_change_mtu,
2604         .ndo_fix_features       = atl1c_fix_features,
2605         .ndo_set_features       = atl1c_set_features,
2606         .ndo_eth_ioctl          = atl1c_ioctl,
2607         .ndo_tx_timeout         = atl1c_tx_timeout,
2608         .ndo_get_stats          = atl1c_get_stats,
2609 #ifdef CONFIG_NET_POLL_CONTROLLER
2610         .ndo_poll_controller    = atl1c_netpoll,
2611 #endif
2612 };
2613
2614 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2615 {
2616         SET_NETDEV_DEV(netdev, &pdev->dev);
2617         pci_set_drvdata(pdev, netdev);
2618
2619         netdev->netdev_ops = &atl1c_netdev_ops;
2620         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2621         netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
2622         atl1c_set_ethtool_ops(netdev);
2623
2624         /* TODO: add when ready */
2625         netdev->hw_features =   NETIF_F_SG              |
2626                                 NETIF_F_HW_CSUM         |
2627                                 NETIF_F_HW_VLAN_CTAG_RX |
2628                                 NETIF_F_TSO             |
2629                                 NETIF_F_TSO6;
2630         netdev->features =      netdev->hw_features     |
2631                                 NETIF_F_HW_VLAN_CTAG_TX;
2632         return 0;
2633 }
2634
2635 /**
2636  * atl1c_probe - Device Initialization Routine
2637  * @pdev: PCI device information struct
2638  * @ent: entry in atl1c_pci_tbl
2639  *
2640  * Returns 0 on success, negative on failure
2641  *
2642  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2643  * The OS initialization, configuring of the adapter private structure,
2644  * and a hardware reset occur.
2645  */
2646 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2647 {
2648         struct net_device *netdev;
2649         struct atl1c_adapter *adapter;
2650         static int cards_found;
2651         u8 __iomem *hw_addr;
2652         enum atl1c_nic_type nic_type;
2653         u32 queue_count = 1;
2654         int err = 0;
2655         int i;
2656
2657         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2658         err = pci_enable_device_mem(pdev);
2659         if (err)
2660                 return dev_err_probe(&pdev->dev, err, "cannot enable PCI device\n");
2661
2662         /*
2663          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2664          * shared register for the high 32 bits, so only a single, aligned,
2665          * 4 GB physical address range can be used at a time.
2666          *
2667          * Supporting 64-bit DMA on this hardware is more trouble than it's
2668          * worth.  It is far easier to limit to 32-bit DMA than update
2669          * various kernel subsystems to support the mechanics required by a
2670          * fixed-high-32-bit system.
2671          */
2672         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2673         if (err) {
2674                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2675                 goto err_dma;
2676         }
2677
2678         err = pci_request_regions(pdev, atl1c_driver_name);
2679         if (err) {
2680                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2681                 goto err_pci_reg;
2682         }
2683
2684         pci_set_master(pdev);
2685
2686         hw_addr = pci_ioremap_bar(pdev, 0);
2687         if (!hw_addr) {
2688                 err = -EIO;
2689                 dev_err(&pdev->dev, "cannot map device registers\n");
2690                 goto err_ioremap;
2691         }
2692
2693         nic_type = atl1c_get_mac_type(pdev, hw_addr);
2694         if (nic_type == athr_mt)
2695                 queue_count = 4;
2696
2697         netdev = alloc_etherdev_mq(sizeof(struct atl1c_adapter), queue_count);
2698         if (netdev == NULL) {
2699                 err = -ENOMEM;
2700                 goto err_alloc_etherdev;
2701         }
2702
2703         err = atl1c_init_netdev(netdev, pdev);
2704         if (err) {
2705                 dev_err(&pdev->dev, "init netdevice failed\n");
2706                 goto err_init_netdev;
2707         }
2708         adapter = netdev_priv(netdev);
2709         adapter->bd_number = cards_found;
2710         adapter->netdev = netdev;
2711         adapter->pdev = pdev;
2712         adapter->hw.adapter = adapter;
2713         adapter->hw.nic_type = nic_type;
2714         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2715         adapter->hw.hw_addr = hw_addr;
2716         adapter->tx_queue_count = queue_count;
2717         adapter->rx_queue_count = queue_count;
2718
2719         /* init mii data */
2720         adapter->mii.dev = netdev;
2721         adapter->mii.mdio_read  = atl1c_mdio_read;
2722         adapter->mii.mdio_write = atl1c_mdio_write;
2723         adapter->mii.phy_id_mask = 0x1f;
2724         adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK;
2725         dev_set_threaded(netdev, true);
2726         for (i = 0; i < adapter->rx_queue_count; ++i)
2727                 netif_napi_add(netdev, &adapter->rrd_ring[i].napi,
2728                                atl1c_clean_rx);
2729         for (i = 0; i < adapter->tx_queue_count; ++i)
2730                 netif_napi_add_tx(netdev, &adapter->tpd_ring[i].napi,
2731                                   atl1c_clean_tx);
2732         timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0);
2733         /* setup the private structure */
2734         err = atl1c_sw_init(adapter);
2735         if (err) {
2736                 dev_err(&pdev->dev, "net device private data init failed\n");
2737                 goto err_sw_init;
2738         }
2739         /* set max MTU */
2740         atl1c_set_max_mtu(netdev);
2741
2742         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
2743
2744         /* Init GPHY as early as possible due to power saving issue  */
2745         atl1c_phy_reset(&adapter->hw);
2746
2747         err = atl1c_reset_mac(&adapter->hw);
2748         if (err) {
2749                 err = -EIO;
2750                 goto err_reset;
2751         }
2752
2753         /* reset the controller to
2754          * put the device in a known good starting state */
2755         err = atl1c_phy_init(&adapter->hw);
2756         if (err) {
2757                 err = -EIO;
2758                 goto err_reset;
2759         }
2760         if (atl1c_read_mac_addr(&adapter->hw)) {
2761                 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */
2762                 netdev->addr_assign_type = NET_ADDR_RANDOM;
2763         }
2764         eth_hw_addr_set(netdev, adapter->hw.mac_addr);
2765         if (netif_msg_probe(adapter))
2766                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2767                         adapter->hw.mac_addr);
2768
2769         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr);
2770         INIT_WORK(&adapter->common_task, atl1c_common_task);
2771         adapter->work_event = 0;
2772         err = register_netdev(netdev);
2773         if (err) {
2774                 dev_err(&pdev->dev, "register netdevice failed\n");
2775                 goto err_register;
2776         }
2777
2778         cards_found++;
2779         return 0;
2780
2781 err_reset:
2782 err_register:
2783 err_sw_init:
2784 err_init_netdev:
2785         free_netdev(netdev);
2786 err_alloc_etherdev:
2787         iounmap(hw_addr);
2788 err_ioremap:
2789         pci_release_regions(pdev);
2790 err_pci_reg:
2791 err_dma:
2792         pci_disable_device(pdev);
2793         return err;
2794 }
2795
2796 /**
2797  * atl1c_remove - Device Removal Routine
2798  * @pdev: PCI device information struct
2799  *
2800  * atl1c_remove is called by the PCI subsystem to alert the driver
2801  * that it should release a PCI device.  The could be caused by a
2802  * Hot-Plug event, or because the driver is going to be removed from
2803  * memory.
2804  */
2805 static void atl1c_remove(struct pci_dev *pdev)
2806 {
2807         struct net_device *netdev = pci_get_drvdata(pdev);
2808         struct atl1c_adapter *adapter = netdev_priv(netdev);
2809
2810         unregister_netdev(netdev);
2811         /* restore permanent address */
2812         atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr);
2813         atl1c_phy_disable(&adapter->hw);
2814
2815         iounmap(adapter->hw.hw_addr);
2816
2817         pci_release_regions(pdev);
2818         pci_disable_device(pdev);
2819         free_netdev(netdev);
2820 }
2821
2822 /**
2823  * atl1c_io_error_detected - called when PCI error is detected
2824  * @pdev: Pointer to PCI device
2825  * @state: The current pci connection state
2826  *
2827  * This function is called after a PCI bus error affecting
2828  * this device has been detected.
2829  */
2830 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2831                                                 pci_channel_state_t state)
2832 {
2833         struct net_device *netdev = pci_get_drvdata(pdev);
2834         struct atl1c_adapter *adapter = netdev_priv(netdev);
2835
2836         netif_device_detach(netdev);
2837
2838         if (state == pci_channel_io_perm_failure)
2839                 return PCI_ERS_RESULT_DISCONNECT;
2840
2841         if (netif_running(netdev))
2842                 atl1c_down(adapter);
2843
2844         pci_disable_device(pdev);
2845
2846         /* Request a slot reset. */
2847         return PCI_ERS_RESULT_NEED_RESET;
2848 }
2849
2850 /**
2851  * atl1c_io_slot_reset - called after the pci bus has been reset.
2852  * @pdev: Pointer to PCI device
2853  *
2854  * Restart the card from scratch, as if from a cold-boot. Implementation
2855  * resembles the first-half of the e1000_resume routine.
2856  */
2857 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2858 {
2859         struct net_device *netdev = pci_get_drvdata(pdev);
2860         struct atl1c_adapter *adapter = netdev_priv(netdev);
2861
2862         if (pci_enable_device(pdev)) {
2863                 if (netif_msg_hw(adapter))
2864                         dev_err(&pdev->dev,
2865                                 "Cannot re-enable PCI device after reset\n");
2866                 return PCI_ERS_RESULT_DISCONNECT;
2867         }
2868         pci_set_master(pdev);
2869
2870         pci_enable_wake(pdev, PCI_D3hot, 0);
2871         pci_enable_wake(pdev, PCI_D3cold, 0);
2872
2873         atl1c_reset_mac(&adapter->hw);
2874
2875         return PCI_ERS_RESULT_RECOVERED;
2876 }
2877
2878 /**
2879  * atl1c_io_resume - called when traffic can start flowing again.
2880  * @pdev: Pointer to PCI device
2881  *
2882  * This callback is called when the error recovery driver tells us that
2883  * its OK to resume normal operation. Implementation resembles the
2884  * second-half of the atl1c_resume routine.
2885  */
2886 static void atl1c_io_resume(struct pci_dev *pdev)
2887 {
2888         struct net_device *netdev = pci_get_drvdata(pdev);
2889         struct atl1c_adapter *adapter = netdev_priv(netdev);
2890
2891         if (netif_running(netdev)) {
2892                 if (atl1c_up(adapter)) {
2893                         if (netif_msg_hw(adapter))
2894                                 dev_err(&pdev->dev,
2895                                         "Cannot bring device back up after reset\n");
2896                         return;
2897                 }
2898         }
2899
2900         netif_device_attach(netdev);
2901 }
2902
2903 static const struct pci_error_handlers atl1c_err_handler = {
2904         .error_detected = atl1c_io_error_detected,
2905         .slot_reset = atl1c_io_slot_reset,
2906         .resume = atl1c_io_resume,
2907 };
2908
2909 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2910
2911 static struct pci_driver atl1c_driver = {
2912         .name     = atl1c_driver_name,
2913         .id_table = atl1c_pci_tbl,
2914         .probe    = atl1c_probe,
2915         .remove   = atl1c_remove,
2916         .shutdown = atl1c_shutdown,
2917         .err_handler = &atl1c_err_handler,
2918         .driver.pm = &atl1c_pm_ops,
2919 };
2920
2921 module_pci_driver(atl1c_driver);