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

   1 /*
   2  * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved.
   3  *
   4  * Derived from Intel e1000 driver
   5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include "atl1c.h"
  23
  24 #define ATL1C_DRV_VERSION "1.0.1.0-NAPI"
  25 char atl1c_driver_name[] = "atl1c";
  26 char atl1c_driver_version[] = ATL1C_DRV_VERSION;
  27 #define PCI_DEVICE_ID_ATTANSIC_L2C      0x1062
  28 #define PCI_DEVICE_ID_ATTANSIC_L1C      0x1063
  29 #define PCI_DEVICE_ID_ATHEROS_L2C_B     0x2060 /* AR8152 v1.1 Fast 10/100 */
  30 #define PCI_DEVICE_ID_ATHEROS_L2C_B2    0x2062 /* AR8152 v2.0 Fast 10/100 */
  31 #define PCI_DEVICE_ID_ATHEROS_L1D       0x1073 /* AR8151 v1.0 Gigabit 1000 */
  32 #define PCI_DEVICE_ID_ATHEROS_L1D_2_0   0x1083 /* AR8151 v2.0 Gigabit 1000 */
  33 #define L2CB_V10                        0xc0
  34 #define L2CB_V11                        0xc1
  35
  36 /*
  37  * atl1c_pci_tbl - PCI Device ID Table
  38  *
  39  * Wildcard entries (PCI_ANY_ID) should come last
  40  * Last entry must be all 0s
  41  *
  42  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  43  *   Class, Class Mask, private data (not used) }
  44  */
  45 static DEFINE_PCI_DEVICE_TABLE(atl1c_pci_tbl) = {
  46         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)},
  47         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)},
  48         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)},
  49         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)},
  50         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)},
  51         {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)},
  52         /* required last entry */
  53         { 0 }
  54 };
  55 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl);
  56
  57 MODULE_AUTHOR("Jie Yang <jie.yang@atheros.com>");
  58 MODULE_DESCRIPTION("Atheros 1000M Ethernet Network Driver");
  59 MODULE_LICENSE("GPL");
  60 MODULE_VERSION(ATL1C_DRV_VERSION);
  61
  62 static int atl1c_stop_mac(struct atl1c_hw *hw);
  63 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw);
  64 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw);
  65 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw);
  66 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup);
  67 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter);
  68 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
  69                    int *work_done, int work_to_do);
  70 static int atl1c_up(struct atl1c_adapter *adapter);
  71 static void atl1c_down(struct atl1c_adapter *adapter);
  72
  73 static const u16 atl1c_pay_load_size[] = {
  74         128, 256, 512, 1024, 2048, 4096,
  75 };
  76
  77 static const u16 atl1c_rfd_prod_idx_regs[AT_MAX_RECEIVE_QUEUE] =
  78 {
  79         REG_MB_RFD0_PROD_IDX,
  80         REG_MB_RFD1_PROD_IDX,
  81         REG_MB_RFD2_PROD_IDX,
  82         REG_MB_RFD3_PROD_IDX
  83 };
  84
  85 static const u16 atl1c_rfd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  86 {
  87         REG_RFD0_HEAD_ADDR_LO,
  88         REG_RFD1_HEAD_ADDR_LO,
  89         REG_RFD2_HEAD_ADDR_LO,
  90         REG_RFD3_HEAD_ADDR_LO
  91 };
  92
  93 static const u16 atl1c_rrd_addr_lo_regs[AT_MAX_RECEIVE_QUEUE] =
  94 {
  95         REG_RRD0_HEAD_ADDR_LO,
  96         REG_RRD1_HEAD_ADDR_LO,
  97         REG_RRD2_HEAD_ADDR_LO,
  98         REG_RRD3_HEAD_ADDR_LO
  99 };
 100
 101 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
 102         NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
 103 static void atl1c_pcie_patch(struct atl1c_hw *hw)
 104 {
 105         u32 data;
 106
 107         AT_READ_REG(hw, REG_PCIE_PHYMISC, &data);
 108         data |= PCIE_PHYMISC_FORCE_RCV_DET;
 109         AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data);
 110
 111         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) {
 112                 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data);
 113
 114                 data &= ~(PCIE_PHYMISC2_SERDES_CDR_MASK <<
 115                         PCIE_PHYMISC2_SERDES_CDR_SHIFT);
 116                 data |= 3 << PCIE_PHYMISC2_SERDES_CDR_SHIFT;
 117                 data &= ~(PCIE_PHYMISC2_SERDES_TH_MASK <<
 118                         PCIE_PHYMISC2_SERDES_TH_SHIFT);
 119                 data |= 3 << PCIE_PHYMISC2_SERDES_TH_SHIFT;
 120                 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data);
 121         }
 122 }
 123
 124 /* FIXME: no need any more ? */
 125 /*
 126  * atl1c_init_pcie - init PCIE module
 127  */
 128 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag)
 129 {
 130         u32 data;
 131         u32 pci_cmd;
 132         struct pci_dev *pdev = hw->adapter->pdev;
 133
 134         AT_READ_REG(hw, PCI_COMMAND, &pci_cmd);
 135         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
 136         pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 137                 PCI_COMMAND_IO);
 138         AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd);
 139
 140         /*
 141          * Clear any PowerSaveing Settings
 142          */
 143         pci_enable_wake(pdev, PCI_D3hot, 0);
 144         pci_enable_wake(pdev, PCI_D3cold, 0);
 145
 146         /*
 147          * Mask some pcie error bits
 148          */
 149         AT_READ_REG(hw, REG_PCIE_UC_SEVERITY, &data);
 150         data &= ~PCIE_UC_SERVRITY_DLP;
 151         data &= ~PCIE_UC_SERVRITY_FCP;
 152         AT_WRITE_REG(hw, REG_PCIE_UC_SEVERITY, data);
 153
 154         AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data);
 155         data &= ~LTSSM_ID_EN_WRO;
 156         AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data);
 157
 158         atl1c_pcie_patch(hw);
 159         if (flag & ATL1C_PCIE_L0S_L1_DISABLE)
 160                 atl1c_disable_l0s_l1(hw);
 161         if (flag & ATL1C_PCIE_PHY_RESET)
 162                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
 163         else
 164                 AT_WRITE_REG(hw, REG_GPHY_CTRL,
 165                         GPHY_CTRL_DEFAULT | GPHY_CTRL_EXT_RESET);
 166
 167         msleep(5);
 168 }
 169
 170 /*
 171  * atl1c_irq_enable - Enable default interrupt generation settings
 172  * @adapter: board private structure
 173  */
 174 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter)
 175 {
 176         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 177                 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF);
 178                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
 179                 AT_WRITE_FLUSH(&adapter->hw);
 180         }
 181 }
 182
 183 /*
 184  * atl1c_irq_disable - Mask off interrupt generation on the NIC
 185  * @adapter: board private structure
 186  */
 187 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter)
 188 {
 189         atomic_inc(&adapter->irq_sem);
 190         AT_WRITE_REG(&adapter->hw, REG_IMR, 0);
 191         AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT);
 192         AT_WRITE_FLUSH(&adapter->hw);
 193         synchronize_irq(adapter->pdev->irq);
 194 }
 195
 196 /*
 197  * atl1c_irq_reset - reset interrupt confiure on the NIC
 198  * @adapter: board private structure
 199  */
 200 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter)
 201 {
 202         atomic_set(&adapter->irq_sem, 1);
 203         atl1c_irq_enable(adapter);
 204 }
 205
 206 /*
 207  * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads
 208  * of the idle status register until the device is actually idle
 209  */
 210 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw)
 211 {
 212         int timeout;
 213         u32 data;
 214
 215         for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
 216                 AT_READ_REG(hw, REG_IDLE_STATUS, &data);
 217                 if ((data & IDLE_STATUS_MASK) == 0)
 218                         return 0;
 219                 msleep(1);
 220         }
 221         return data;
 222 }
 223
 224 /*
 225  * atl1c_phy_config - Timer Call-back
 226  * @data: pointer to netdev cast into an unsigned long
 227  */
 228 static void atl1c_phy_config(unsigned long data)
 229 {
 230         struct atl1c_adapter *adapter = (struct atl1c_adapter *) data;
 231         struct atl1c_hw *hw = &adapter->hw;
 232         unsigned long flags;
 233
 234         spin_lock_irqsave(&adapter->mdio_lock, flags);
 235         atl1c_restart_autoneg(hw);
 236         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 237 }
 238
 239 void atl1c_reinit_locked(struct atl1c_adapter *adapter)
 240 {
 241         WARN_ON(in_interrupt());
 242         atl1c_down(adapter);
 243         atl1c_up(adapter);
 244         clear_bit(__AT_RESETTING, &adapter->flags);
 245 }
 246
 247 static void atl1c_check_link_status(struct atl1c_adapter *adapter)
 248 {
 249         struct atl1c_hw *hw = &adapter->hw;
 250         struct net_device *netdev = adapter->netdev;
 251         struct pci_dev    *pdev   = adapter->pdev;
 252         int err;
 253         unsigned long flags;
 254         u16 speed, duplex, phy_data;
 255
 256         spin_lock_irqsave(&adapter->mdio_lock, flags);
 257         /* MII_BMSR must read twise */
 258         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 259         atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
 260         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 261
 262         if ((phy_data & BMSR_LSTATUS) == 0) {
 263                 /* link down */
 264                 hw->hibernate = true;
 265                 if (atl1c_stop_mac(hw) != 0)
 266                         if (netif_msg_hw(adapter))
 267                                 dev_warn(&pdev->dev, "stop mac failed\n");
 268                 atl1c_set_aspm(hw, false);
 269                 netif_carrier_off(netdev);
 270                 netif_stop_queue(netdev);
 271                 atl1c_phy_reset(hw);
 272                 atl1c_phy_init(&adapter->hw);
 273         } else {
 274                 /* Link Up */
 275                 hw->hibernate = false;
 276                 spin_lock_irqsave(&adapter->mdio_lock, flags);
 277                 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex);
 278                 spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 279                 if (unlikely(err))
 280                         return;
 281                 /* link result is our setting */
 282                 if (adapter->link_speed != speed ||
 283                     adapter->link_duplex != duplex) {
 284                         adapter->link_speed  = speed;
 285                         adapter->link_duplex = duplex;
 286                         atl1c_set_aspm(hw, true);
 287                         atl1c_enable_tx_ctrl(hw);
 288                         atl1c_enable_rx_ctrl(hw);
 289                         atl1c_setup_mac_ctrl(adapter);
 290                         if (netif_msg_link(adapter))
 291                                 dev_info(&pdev->dev,
 292                                         "%s: %s NIC Link is Up<%d Mbps %s>\n",
 293                                         atl1c_driver_name, netdev->name,
 294                                         adapter->link_speed,
 295                                         adapter->link_duplex == FULL_DUPLEX ?
 296                                         "Full Duplex" : "Half Duplex");
 297                 }
 298                 if (!netif_carrier_ok(netdev))
 299                         netif_carrier_on(netdev);
 300         }
 301 }
 302
 303 static void atl1c_link_chg_event(struct atl1c_adapter *adapter)
 304 {
 305         struct net_device *netdev = adapter->netdev;
 306         struct pci_dev    *pdev   = adapter->pdev;
 307         u16 phy_data;
 308         u16 link_up;
 309
 310         spin_lock(&adapter->mdio_lock);
 311         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 312         atl1c_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 313         spin_unlock(&adapter->mdio_lock);
 314         link_up = phy_data & BMSR_LSTATUS;
 315         /* notify upper layer link down ASAP */
 316         if (!link_up) {
 317                 if (netif_carrier_ok(netdev)) {
 318                         /* old link state: Up */
 319                         netif_carrier_off(netdev);
 320                         if (netif_msg_link(adapter))
 321                                 dev_info(&pdev->dev,
 322                                         "%s: %s NIC Link is Down\n",
 323                                         atl1c_driver_name, netdev->name);
 324                         adapter->link_speed = SPEED_0;
 325                 }
 326         }
 327
 328         set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event);
 329         schedule_work(&adapter->common_task);
 330 }
 331
 332 static void atl1c_common_task(struct work_struct *work)
 333 {
 334         struct atl1c_adapter *adapter;
 335         struct net_device *netdev;
 336
 337         adapter = container_of(work, struct atl1c_adapter, common_task);
 338         netdev = adapter->netdev;
 339
 340         if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) {
 341                 netif_device_detach(netdev);
 342                 atl1c_down(adapter);
 343                 atl1c_up(adapter);
 344                 netif_device_attach(netdev);
 345         }
 346
 347         if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE,
 348                 &adapter->work_event))
 349                 atl1c_check_link_status(adapter);
 350 }
 351
 352
 353 static void atl1c_del_timer(struct atl1c_adapter *adapter)
 354 {
 355         del_timer_sync(&adapter->phy_config_timer);
 356 }
 357
 358
 359 /*
 360  * atl1c_tx_timeout - Respond to a Tx Hang
 361  * @netdev: network interface device structure
 362  */
 363 static void atl1c_tx_timeout(struct net_device *netdev)
 364 {
 365         struct atl1c_adapter *adapter = netdev_priv(netdev);
 366
 367         /* Do the reset outside of interrupt context */
 368         set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event);
 369         schedule_work(&adapter->common_task);
 370 }
 371
 372 /*
 373  * atl1c_set_multi - Multicast and Promiscuous mode set
 374  * @netdev: network interface device structure
 375  *
 376  * The set_multi entry point is called whenever the multicast address
 377  * list or the network interface flags are updated.  This routine is
 378  * responsible for configuring the hardware for proper multicast,
 379  * promiscuous mode, and all-multi behavior.
 380  */
 381 static void atl1c_set_multi(struct net_device *netdev)
 382 {
 383         struct atl1c_adapter *adapter = netdev_priv(netdev);
 384         struct atl1c_hw *hw = &adapter->hw;
 385         struct netdev_hw_addr *ha;
 386         u32 mac_ctrl_data;
 387         u32 hash_value;
 388
 389         /* Check for Promiscuous and All Multicast modes */
 390         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
 391
 392         if (netdev->flags & IFF_PROMISC) {
 393                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
 394         } else if (netdev->flags & IFF_ALLMULTI) {
 395                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
 396                 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN;
 397         } else {
 398                 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 399         }
 400
 401         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
 402
 403         /* clear the old settings from the multicast hash table */
 404         AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
 405         AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
 406
 407         /* comoute mc addresses' hash value ,and put it into hash table */
 408         netdev_for_each_mc_addr(ha, netdev) {
 409                 hash_value = atl1c_hash_mc_addr(hw, ha->addr);
 410                 atl1c_hash_set(hw, hash_value);
 411         }
 412 }
 413
 414 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data)
 415 {
 416         if (features & NETIF_F_HW_VLAN_RX) {
 417                 /* enable VLAN tag insert/strip */
 418                 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN;
 419         } else {
 420                 /* disable VLAN tag insert/strip */
 421                 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN;
 422         }
 423 }
 424
 425 static void atl1c_vlan_mode(struct net_device *netdev,
 426         netdev_features_t features)
 427 {
 428         struct atl1c_adapter *adapter = netdev_priv(netdev);
 429         struct pci_dev *pdev = adapter->pdev;
 430         u32 mac_ctrl_data = 0;
 431
 432         if (netif_msg_pktdata(adapter))
 433                 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n");
 434
 435         atl1c_irq_disable(adapter);
 436         AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data);
 437         __atl1c_vlan_mode(features, &mac_ctrl_data);
 438         AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data);
 439         atl1c_irq_enable(adapter);
 440 }
 441
 442 static void atl1c_restore_vlan(struct atl1c_adapter *adapter)
 443 {
 444         struct pci_dev *pdev = adapter->pdev;
 445
 446         if (netif_msg_pktdata(adapter))
 447                 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n");
 448         atl1c_vlan_mode(adapter->netdev, adapter->netdev->features);
 449 }
 450
 451 /*
 452  * atl1c_set_mac - Change the Ethernet Address of the NIC
 453  * @netdev: network interface device structure
 454  * @p: pointer to an address structure
 455  *
 456  * Returns 0 on success, negative on failure
 457  */
 458 static int atl1c_set_mac_addr(struct net_device *netdev, void *p)
 459 {
 460         struct atl1c_adapter *adapter = netdev_priv(netdev);
 461         struct sockaddr *addr = p;
 462
 463         if (!is_valid_ether_addr(addr->sa_data))
 464                 return -EADDRNOTAVAIL;
 465
 466         if (netif_running(netdev))
 467                 return -EBUSY;
 468
 469         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 470         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 471
 472         atl1c_hw_set_mac_addr(&adapter->hw);
 473
 474         return 0;
 475 }
 476
 477 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter,
 478                                 struct net_device *dev)
 479 {
 480         int mtu = dev->mtu;
 481
 482         adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ?
 483                 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE;
 484 }
 485
 486 static netdev_features_t atl1c_fix_features(struct net_device *netdev,
 487         netdev_features_t features)
 488 {
 489         /*
 490          * Since there is no support for separate rx/tx vlan accel
 491          * enable/disable make sure tx flag is always in same state as rx.
 492          */
 493         if (features & NETIF_F_HW_VLAN_RX)
 494                 features |= NETIF_F_HW_VLAN_TX;
 495         else
 496                 features &= ~NETIF_F_HW_VLAN_TX;
 497
 498         if (netdev->mtu > MAX_TSO_FRAME_SIZE)
 499                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
 500
 501         return features;
 502 }
 503
 504 static int atl1c_set_features(struct net_device *netdev,
 505         netdev_features_t features)
 506 {
 507         netdev_features_t changed = netdev->features ^ features;
 508
 509         if (changed & NETIF_F_HW_VLAN_RX)
 510                 atl1c_vlan_mode(netdev, features);
 511
 512         return 0;
 513 }
 514
 515 /*
 516  * atl1c_change_mtu - Change the Maximum Transfer Unit
 517  * @netdev: network interface device structure
 518  * @new_mtu: new value for maximum frame size
 519  *
 520  * Returns 0 on success, negative on failure
 521  */
 522 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
 523 {
 524         struct atl1c_adapter *adapter = netdev_priv(netdev);
 525         int old_mtu   = netdev->mtu;
 526         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 527
 528         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
 529                         (max_frame > MAX_JUMBO_FRAME_SIZE)) {
 530                 if (netif_msg_link(adapter))
 531                         dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
 532                 return -EINVAL;
 533         }
 534         /* set MTU */
 535         if (old_mtu != new_mtu && netif_running(netdev)) {
 536                 while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
 537                         msleep(1);
 538                 netdev->mtu = new_mtu;
 539                 adapter->hw.max_frame_size = new_mtu;
 540                 atl1c_set_rxbufsize(adapter, netdev);
 541                 atl1c_down(adapter);
 542                 netdev_update_features(netdev);
 543                 atl1c_up(adapter);
 544                 clear_bit(__AT_RESETTING, &adapter->flags);
 545                 if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
 546                         u32 phy_data;
 547
 548                         AT_READ_REG(&adapter->hw, 0x1414, &phy_data);
 549                         phy_data |= 0x10000000;
 550                         AT_WRITE_REG(&adapter->hw, 0x1414, phy_data);
 551                 }
 552
 553         }
 554         return 0;
 555 }
 556
 557 /*
 558  *  caller should hold mdio_lock
 559  */
 560 static int atl1c_mdio_read(struct net_device *netdev, int phy_id, int reg_num)
 561 {
 562         struct atl1c_adapter *adapter = netdev_priv(netdev);
 563         u16 result;
 564
 565         atl1c_read_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, &result);
 566         return result;
 567 }
 568
 569 static void atl1c_mdio_write(struct net_device *netdev, int phy_id,
 570                              int reg_num, int val)
 571 {
 572         struct atl1c_adapter *adapter = netdev_priv(netdev);
 573
 574         atl1c_write_phy_reg(&adapter->hw, reg_num & MDIO_REG_ADDR_MASK, val);
 575 }
 576
 577 /*
 578  * atl1c_mii_ioctl -
 579  * @netdev:
 580  * @ifreq:
 581  * @cmd:
 582  */
 583 static int atl1c_mii_ioctl(struct net_device *netdev,
 584                            struct ifreq *ifr, int cmd)
 585 {
 586         struct atl1c_adapter *adapter = netdev_priv(netdev);
 587         struct pci_dev *pdev = adapter->pdev;
 588         struct mii_ioctl_data *data = if_mii(ifr);
 589         unsigned long flags;
 590         int retval = 0;
 591
 592         if (!netif_running(netdev))
 593                 return -EINVAL;
 594
 595         spin_lock_irqsave(&adapter->mdio_lock, flags);
 596         switch (cmd) {
 597         case SIOCGMIIPHY:
 598                 data->phy_id = 0;
 599                 break;
 600
 601         case SIOCGMIIREG:
 602                 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
 603                                     &data->val_out)) {
 604                         retval = -EIO;
 605                         goto out;
 606                 }
 607                 break;
 608
 609         case SIOCSMIIREG:
 610                 if (data->reg_num & ~(0x1F)) {
 611                         retval = -EFAULT;
 612                         goto out;
 613                 }
 614
 615                 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x",
 616                                 data->reg_num, data->val_in);
 617                 if (atl1c_write_phy_reg(&adapter->hw,
 618                                      data->reg_num, data->val_in)) {
 619                         retval = -EIO;
 620                         goto out;
 621                 }
 622                 break;
 623
 624         default:
 625                 retval = -EOPNOTSUPP;
 626                 break;
 627         }
 628 out:
 629         spin_unlock_irqrestore(&adapter->mdio_lock, flags);
 630         return retval;
 631 }
 632
 633 /*
 634  * atl1c_ioctl -
 635  * @netdev:
 636  * @ifreq:
 637  * @cmd:
 638  */
 639 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 640 {
 641         switch (cmd) {
 642         case SIOCGMIIPHY:
 643         case SIOCGMIIREG:
 644         case SIOCSMIIREG:
 645                 return atl1c_mii_ioctl(netdev, ifr, cmd);
 646         default:
 647                 return -EOPNOTSUPP;
 648         }
 649 }
 650
 651 /*
 652  * atl1c_alloc_queues - Allocate memory for all rings
 653  * @adapter: board private structure to initialize
 654  *
 655  */
 656 static int __devinit atl1c_alloc_queues(struct atl1c_adapter *adapter)
 657 {
 658         return 0;
 659 }
 660
 661 static void atl1c_set_mac_type(struct atl1c_hw *hw)
 662 {
 663         switch (hw->device_id) {
 664         case PCI_DEVICE_ID_ATTANSIC_L2C:
 665                 hw->nic_type = athr_l2c;
 666                 break;
 667         case PCI_DEVICE_ID_ATTANSIC_L1C:
 668                 hw->nic_type = athr_l1c;
 669                 break;
 670         case PCI_DEVICE_ID_ATHEROS_L2C_B:
 671                 hw->nic_type = athr_l2c_b;
 672                 break;
 673         case PCI_DEVICE_ID_ATHEROS_L2C_B2:
 674                 hw->nic_type = athr_l2c_b2;
 675                 break;
 676         case PCI_DEVICE_ID_ATHEROS_L1D:
 677                 hw->nic_type = athr_l1d;
 678                 break;
 679         case PCI_DEVICE_ID_ATHEROS_L1D_2_0:
 680                 hw->nic_type = athr_l1d_2;
 681                 break;
 682         default:
 683                 break;
 684         }
 685 }
 686
 687 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw)
 688 {
 689         u32 phy_status_data;
 690         u32 link_ctrl_data;
 691
 692         atl1c_set_mac_type(hw);
 693         AT_READ_REG(hw, REG_PHY_STATUS, &phy_status_data);
 694         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
 695
 696         hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE  |
 697                          ATL1C_TXQ_MODE_ENHANCE;
 698         if (link_ctrl_data & LINK_CTRL_L0S_EN)
 699                 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT;
 700         if (link_ctrl_data & LINK_CTRL_L1_EN)
 701                 hw->ctrl_flags |= ATL1C_ASPM_L1_SUPPORT;
 702         if (link_ctrl_data & LINK_CTRL_EXT_SYNC)
 703                 hw->ctrl_flags |= ATL1C_LINK_EXT_SYNC;
 704         hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON;
 705
 706         if (hw->nic_type == athr_l1c ||
 707             hw->nic_type == athr_l1d ||
 708             hw->nic_type == athr_l1d_2)
 709                 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M;
 710         return 0;
 711 }
 712 /*
 713  * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter)
 714  * @adapter: board private structure to initialize
 715  *
 716  * atl1c_sw_init initializes the Adapter private data structure.
 717  * Fields are initialized based on PCI device information and
 718  * OS network device settings (MTU size).
 719  */
 720 static int __devinit atl1c_sw_init(struct atl1c_adapter *adapter)
 721 {
 722         struct atl1c_hw *hw   = &adapter->hw;
 723         struct pci_dev  *pdev = adapter->pdev;
 724         u32 revision;
 725
 726
 727         adapter->wol = 0;
 728         device_set_wakeup_enable(&pdev->dev, false);
 729         adapter->link_speed = SPEED_0;
 730         adapter->link_duplex = FULL_DUPLEX;
 731         adapter->num_rx_queues = AT_DEF_RECEIVE_QUEUE;
 732         adapter->tpd_ring[0].count = 1024;
 733         adapter->rfd_ring[0].count = 512;
 734
 735         hw->vendor_id = pdev->vendor;
 736         hw->device_id = pdev->device;
 737         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 738         hw->subsystem_id = pdev->subsystem_device;
 739         AT_READ_REG(hw, PCI_CLASS_REVISION, &revision);
 740         hw->revision_id = revision & 0xFF;
 741         /* before link up, we assume hibernate is true */
 742         hw->hibernate = true;
 743         hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
 744         if (atl1c_setup_mac_funcs(hw) != 0) {
 745                 dev_err(&pdev->dev, "set mac function pointers failed\n");
 746                 return -1;
 747         }
 748         hw->intr_mask = IMR_NORMAL_MASK;
 749         hw->phy_configured = false;
 750         hw->preamble_len = 7;
 751         hw->max_frame_size = adapter->netdev->mtu;
 752         if (adapter->num_rx_queues < 2) {
 753                 hw->rss_type = atl1c_rss_disable;
 754                 hw->rss_mode = atl1c_rss_mode_disable;
 755         } else {
 756                 hw->rss_type = atl1c_rss_ipv4;
 757                 hw->rss_mode = atl1c_rss_mul_que_mul_int;
 758                 hw->rss_hash_bits = 16;
 759         }
 760         hw->autoneg_advertised = ADVERTISED_Autoneg;
 761         hw->indirect_tab = 0xE4E4E4E4;
 762         hw->base_cpu = 0;
 763
 764         hw->ict = 50000;                /* 100ms */
 765         hw->smb_timer = 200000;         /* 400ms */
 766         hw->cmb_tpd = 4;
 767         hw->cmb_tx_timer = 1;           /* 2 us  */
 768         hw->rx_imt = 200;
 769         hw->tx_imt = 1000;
 770
 771         hw->tpd_burst = 5;
 772         hw->rfd_burst = 8;
 773         hw->dma_order = atl1c_dma_ord_out;
 774         hw->dmar_block = atl1c_dma_req_1024;
 775         hw->dmaw_block = atl1c_dma_req_1024;
 776         hw->dmar_dly_cnt = 15;
 777         hw->dmaw_dly_cnt = 4;
 778
 779         if (atl1c_alloc_queues(adapter)) {
 780                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 781                 return -ENOMEM;
 782         }
 783         /* TODO */
 784         atl1c_set_rxbufsize(adapter, adapter->netdev);
 785         atomic_set(&adapter->irq_sem, 1);
 786         spin_lock_init(&adapter->mdio_lock);
 787         spin_lock_init(&adapter->tx_lock);
 788         set_bit(__AT_DOWN, &adapter->flags);
 789
 790         return 0;
 791 }
 792
 793 static inline void atl1c_clean_buffer(struct pci_dev *pdev,
 794                                 struct atl1c_buffer *buffer_info, int in_irq)
 795 {
 796         u16 pci_driection;
 797         if (buffer_info->flags & ATL1C_BUFFER_FREE)
 798                 return;
 799         if (buffer_info->dma) {
 800                 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE)
 801                         pci_driection = PCI_DMA_FROMDEVICE;
 802                 else
 803                         pci_driection = PCI_DMA_TODEVICE;
 804
 805                 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE)
 806                         pci_unmap_single(pdev, buffer_info->dma,
 807                                         buffer_info->length, pci_driection);
 808                 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE)
 809                         pci_unmap_page(pdev, buffer_info->dma,
 810                                         buffer_info->length, pci_driection);
 811         }
 812         if (buffer_info->skb) {
 813                 if (in_irq)
 814                         dev_kfree_skb_irq(buffer_info->skb);
 815                 else
 816                         dev_kfree_skb(buffer_info->skb);
 817         }
 818         buffer_info->dma = 0;
 819         buffer_info->skb = NULL;
 820         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 821 }
 822 /*
 823  * atl1c_clean_tx_ring - Free Tx-skb
 824  * @adapter: board private structure
 825  */
 826 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter,
 827                                 enum atl1c_trans_queue type)
 828 {
 829         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
 830         struct atl1c_buffer *buffer_info;
 831         struct pci_dev *pdev = adapter->pdev;
 832         u16 index, ring_count;
 833
 834         ring_count = tpd_ring->count;
 835         for (index = 0; index < ring_count; index++) {
 836                 buffer_info = &tpd_ring->buffer_info[index];
 837                 atl1c_clean_buffer(pdev, buffer_info, 0);
 838         }
 839
 840         /* Zero out Tx-buffers */
 841         memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) *
 842                 ring_count);
 843         atomic_set(&tpd_ring->next_to_clean, 0);
 844         tpd_ring->next_to_use = 0;
 845 }
 846
 847 /*
 848  * atl1c_clean_rx_ring - Free rx-reservation skbs
 849  * @adapter: board private structure
 850  */
 851 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter)
 852 {
 853         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 854         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 855         struct atl1c_buffer *buffer_info;
 856         struct pci_dev *pdev = adapter->pdev;
 857         int i, j;
 858
 859         for (i = 0; i < adapter->num_rx_queues; i++) {
 860                 for (j = 0; j < rfd_ring[i].count; j++) {
 861                         buffer_info = &rfd_ring[i].buffer_info[j];
 862                         atl1c_clean_buffer(pdev, buffer_info, 0);
 863                 }
 864                 /* zero out the descriptor ring */
 865                 memset(rfd_ring[i].desc, 0, rfd_ring[i].size);
 866                 rfd_ring[i].next_to_clean = 0;
 867                 rfd_ring[i].next_to_use = 0;
 868                 rrd_ring[i].next_to_use = 0;
 869                 rrd_ring[i].next_to_clean = 0;
 870         }
 871 }
 872
 873 /*
 874  * Read / Write Ptr Initialize:
 875  */
 876 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter)
 877 {
 878         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 879         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 880         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 881         struct atl1c_buffer *buffer_info;
 882         int i, j;
 883
 884         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 885                 tpd_ring[i].next_to_use = 0;
 886                 atomic_set(&tpd_ring[i].next_to_clean, 0);
 887                 buffer_info = tpd_ring[i].buffer_info;
 888                 for (j = 0; j < tpd_ring->count; j++)
 889                         ATL1C_SET_BUFFER_STATE(&buffer_info[i],
 890                                         ATL1C_BUFFER_FREE);
 891         }
 892         for (i = 0; i < adapter->num_rx_queues; i++) {
 893                 rfd_ring[i].next_to_use = 0;
 894                 rfd_ring[i].next_to_clean = 0;
 895                 rrd_ring[i].next_to_use = 0;
 896                 rrd_ring[i].next_to_clean = 0;
 897                 for (j = 0; j < rfd_ring[i].count; j++) {
 898                         buffer_info = &rfd_ring[i].buffer_info[j];
 899                         ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE);
 900                 }
 901         }
 902 }
 903
 904 /*
 905  * atl1c_free_ring_resources - Free Tx / RX descriptor Resources
 906  * @adapter: board private structure
 907  *
 908  * Free all transmit software resources
 909  */
 910 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter)
 911 {
 912         struct pci_dev *pdev = adapter->pdev;
 913
 914         pci_free_consistent(pdev, adapter->ring_header.size,
 915                                         adapter->ring_header.desc,
 916                                         adapter->ring_header.dma);
 917         adapter->ring_header.desc = NULL;
 918
 919         /* Note: just free tdp_ring.buffer_info,
 920         *  it contain rfd_ring.buffer_info, do not double free */
 921         if (adapter->tpd_ring[0].buffer_info) {
 922                 kfree(adapter->tpd_ring[0].buffer_info);
 923                 adapter->tpd_ring[0].buffer_info = NULL;
 924         }
 925 }
 926
 927 /*
 928  * atl1c_setup_mem_resources - allocate Tx / RX descriptor resources
 929  * @adapter: board private structure
 930  *
 931  * Return 0 on success, negative on failure
 932  */
 933 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
 934 {
 935         struct pci_dev *pdev = adapter->pdev;
 936         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
 937         struct atl1c_rfd_ring *rfd_ring = adapter->rfd_ring;
 938         struct atl1c_rrd_ring *rrd_ring = adapter->rrd_ring;
 939         struct atl1c_ring_header *ring_header = &adapter->ring_header;
 940         int num_rx_queues = adapter->num_rx_queues;
 941         int size;
 942         int i;
 943         int count = 0;
 944         int rx_desc_count = 0;
 945         u32 offset = 0;
 946
 947         rrd_ring[0].count = rfd_ring[0].count;
 948         for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++)
 949                 tpd_ring[i].count = tpd_ring[0].count;
 950
 951         for (i = 1; i < adapter->num_rx_queues; i++)
 952                 rfd_ring[i].count = rrd_ring[i].count = rfd_ring[0].count;
 953
 954         /* 2 tpd queue, one high priority queue,
 955          * another normal priority queue */
 956         size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 +
 957                 rfd_ring->count * num_rx_queues);
 958         tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
 959         if (unlikely(!tpd_ring->buffer_info)) {
 960                 dev_err(&pdev->dev, "kzalloc failed, size = %d\n",
 961                         size);
 962                 goto err_nomem;
 963         }
 964         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
 965                 tpd_ring[i].buffer_info =
 966                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 967                 count += tpd_ring[i].count;
 968         }
 969
 970         for (i = 0; i < num_rx_queues; i++) {
 971                 rfd_ring[i].buffer_info =
 972                         (struct atl1c_buffer *) (tpd_ring->buffer_info + count);
 973                 count += rfd_ring[i].count;
 974                 rx_desc_count += rfd_ring[i].count;
 975         }
 976         /*
 977          * real ring DMA buffer
 978          * each ring/block may need up to 8 bytes for alignment, hence the
 979          * additional bytes tacked onto the end.
 980          */
 981         ring_header->size = size =
 982                 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
 983                 sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
 984                 sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
 985                 sizeof(struct atl1c_hw_stats) +
 986                 8 * 4 + 8 * 2 * num_rx_queues;
 987
 988         ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
 989                                 &ring_header->dma);
 990         if (unlikely(!ring_header->desc)) {
 991                 dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
 992                 goto err_nomem;
 993         }
 994         memset(ring_header->desc, 0, ring_header->size);
 995         /* init TPD ring */
 996
 997         tpd_ring[0].dma = roundup(ring_header->dma, 8);
 998         offset = tpd_ring[0].dma - ring_header->dma;
 999         for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) {
1000                 tpd_ring[i].dma = ring_header->dma + offset;
1001                 tpd_ring[i].desc = (u8 *) ring_header->desc + offset;
1002                 tpd_ring[i].size =
1003                         sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count;
1004                 offset += roundup(tpd_ring[i].size, 8);
1005         }
1006         /* init RFD ring */
1007         for (i = 0; i < num_rx_queues; i++) {
1008                 rfd_ring[i].dma = ring_header->dma + offset;
1009                 rfd_ring[i].desc = (u8 *) ring_header->desc + offset;
1010                 rfd_ring[i].size = sizeof(struct atl1c_rx_free_desc) *
1011                                 rfd_ring[i].count;
1012                 offset += roundup(rfd_ring[i].size, 8);
1013         }
1014
1015         /* init RRD ring */
1016         for (i = 0; i < num_rx_queues; i++) {
1017                 rrd_ring[i].dma = ring_header->dma + offset;
1018                 rrd_ring[i].desc = (u8 *) ring_header->desc + offset;
1019                 rrd_ring[i].size = sizeof(struct atl1c_recv_ret_status) *
1020                                 rrd_ring[i].count;
1021                 offset += roundup(rrd_ring[i].size, 8);
1022         }
1023
1024         adapter->smb.dma = ring_header->dma + offset;
1025         adapter->smb.smb = (u8 *)ring_header->desc + offset;
1026         return 0;
1027
1028 err_nomem:
1029         kfree(tpd_ring->buffer_info);
1030         return -ENOMEM;
1031 }
1032
1033 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
1034 {
1035         struct atl1c_hw *hw = &adapter->hw;
1036         struct atl1c_rfd_ring *rfd_ring = (struct atl1c_rfd_ring *)
1037                                 adapter->rfd_ring;
1038         struct atl1c_rrd_ring *rrd_ring = (struct atl1c_rrd_ring *)
1039                                 adapter->rrd_ring;
1040         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1041                                 adapter->tpd_ring;
1042         struct atl1c_cmb *cmb = (struct atl1c_cmb *) &adapter->cmb;
1043         struct atl1c_smb *smb = (struct atl1c_smb *) &adapter->smb;
1044         int i;
1045         u32 data;
1046
1047         /* TPD */
1048         AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
1049                         (u32)((tpd_ring[atl1c_trans_normal].dma &
1050                                 AT_DMA_HI_ADDR_MASK) >> 32));
1051         /* just enable normal priority TX queue */
1052         AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
1053                         (u32)(tpd_ring[atl1c_trans_normal].dma &
1054                                 AT_DMA_LO_ADDR_MASK));
1055         AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
1056                         (u32)(tpd_ring[atl1c_trans_high].dma &
1057                                 AT_DMA_LO_ADDR_MASK));
1058         AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
1059                         (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK));
1060
1061
1062         /* RFD */
1063         AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI,
1064                         (u32)((rfd_ring[0].dma & AT_DMA_HI_ADDR_MASK) >> 32));
1065         for (i = 0; i < adapter->num_rx_queues; i++)
1066                 AT_WRITE_REG(hw, atl1c_rfd_addr_lo_regs[i],
1067                         (u32)(rfd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1068
1069         AT_WRITE_REG(hw, REG_RFD_RING_SIZE,
1070                         rfd_ring[0].count & RFD_RING_SIZE_MASK);
1071         AT_WRITE_REG(hw, REG_RX_BUF_SIZE,
1072                         adapter->rx_buffer_len & RX_BUF_SIZE_MASK);
1073
1074         /* RRD */
1075         for (i = 0; i < adapter->num_rx_queues; i++)
1076                 AT_WRITE_REG(hw, atl1c_rrd_addr_lo_regs[i],
1077                         (u32)(rrd_ring[i].dma & AT_DMA_LO_ADDR_MASK));
1078         AT_WRITE_REG(hw, REG_RRD_RING_SIZE,
1079                         (rrd_ring[0].count & RRD_RING_SIZE_MASK));
1080
1081         /* CMB */
1082         AT_WRITE_REG(hw, REG_CMB_BASE_ADDR_LO, cmb->dma & AT_DMA_LO_ADDR_MASK);
1083
1084         /* SMB */
1085         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_HI,
1086                         (u32)((smb->dma & AT_DMA_HI_ADDR_MASK) >> 32));
1087         AT_WRITE_REG(hw, REG_SMB_BASE_ADDR_LO,
1088                         (u32)(smb->dma & AT_DMA_LO_ADDR_MASK));
1089         if (hw->nic_type == athr_l2c_b) {
1090                 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L);
1091                 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L);
1092                 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L);
1093                 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L);
1094                 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L);
1095                 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L);
1096                 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
1097                 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
1098         }
1099         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d_2) {
1100                         /* Power Saving for L2c_B */
1101                 AT_READ_REG(hw, REG_SERDES_LOCK, &data);
1102                 data |= SERDES_MAC_CLK_SLOWDOWN;
1103                 data |= SERDES_PYH_CLK_SLOWDOWN;
1104                 AT_WRITE_REG(hw, REG_SERDES_LOCK, data);
1105         }
1106         /* Load all of base address above */
1107         AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
1108 }
1109
1110 static void atl1c_configure_tx(struct atl1c_adapter *adapter)
1111 {
1112         struct atl1c_hw *hw = &adapter->hw;
1113         u32 dev_ctrl_data;
1114         u32 max_pay_load;
1115         u16 tx_offload_thresh;
1116         u32 txq_ctrl_data;
1117         u32 max_pay_load_data;
1118
1119         tx_offload_thresh = MAX_TX_OFFLOAD_THRESH;
1120         AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH,
1121                 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK);
1122         AT_READ_REG(hw, REG_DEVICE_CTRL, &dev_ctrl_data);
1123         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_PAYLOAD_SHIFT) &
1124                         DEVICE_CTRL_MAX_PAYLOAD_MASK;
1125         hw->dmaw_block = min_t(u32, max_pay_load, hw->dmaw_block);
1126         max_pay_load  = (dev_ctrl_data >> DEVICE_CTRL_MAX_RREQ_SZ_SHIFT) &
1127                         DEVICE_CTRL_MAX_RREQ_SZ_MASK;
1128         hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block);
1129
1130         txq_ctrl_data = (hw->tpd_burst & TXQ_NUM_TPD_BURST_MASK) <<
1131                         TXQ_NUM_TPD_BURST_SHIFT;
1132         if (hw->ctrl_flags & ATL1C_TXQ_MODE_ENHANCE)
1133                 txq_ctrl_data |= TXQ_CTRL_ENH_MODE;
1134         max_pay_load_data = (atl1c_pay_load_size[hw->dmar_block] &
1135                         TXQ_TXF_BURST_NUM_MASK) << TXQ_TXF_BURST_NUM_SHIFT;
1136         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2)
1137                 max_pay_load_data >>= 1;
1138         txq_ctrl_data |= max_pay_load_data;
1139
1140         AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data);
1141 }
1142
1143 static void atl1c_configure_rx(struct atl1c_adapter *adapter)
1144 {
1145         struct atl1c_hw *hw = &adapter->hw;
1146         u32 rxq_ctrl_data;
1147
1148         rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) <<
1149                         RXQ_RFD_BURST_NUM_SHIFT;
1150
1151         if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM)
1152                 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN;
1153         if (hw->rss_type == atl1c_rss_ipv4)
1154                 rxq_ctrl_data |= RSS_HASH_IPV4;
1155         if (hw->rss_type == atl1c_rss_ipv4_tcp)
1156                 rxq_ctrl_data |= RSS_HASH_IPV4_TCP;
1157         if (hw->rss_type == atl1c_rss_ipv6)
1158                 rxq_ctrl_data |= RSS_HASH_IPV6;
1159         if (hw->rss_type == atl1c_rss_ipv6_tcp)
1160                 rxq_ctrl_data |= RSS_HASH_IPV6_TCP;
1161         if (hw->rss_type != atl1c_rss_disable)
1162                 rxq_ctrl_data |= RRS_HASH_CTRL_EN;
1163
1164         rxq_ctrl_data |= (hw->rss_mode & RSS_MODE_MASK) <<
1165                         RSS_MODE_SHIFT;
1166         rxq_ctrl_data |= (hw->rss_hash_bits & RSS_HASH_BITS_MASK) <<
1167                         RSS_HASH_BITS_SHIFT;
1168         if (hw->ctrl_flags & ATL1C_ASPM_CTRL_MON)
1169                 rxq_ctrl_data |= (ASPM_THRUPUT_LIMIT_1M &
1170                         ASPM_THRUPUT_LIMIT_MASK) << ASPM_THRUPUT_LIMIT_SHIFT;
1171
1172         AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data);
1173 }
1174
1175 static void atl1c_configure_rss(struct atl1c_adapter *adapter)
1176 {
1177         struct atl1c_hw *hw = &adapter->hw;
1178
1179         AT_WRITE_REG(hw, REG_IDT_TABLE, hw->indirect_tab);
1180         AT_WRITE_REG(hw, REG_BASE_CPU_NUMBER, hw->base_cpu);
1181 }
1182
1183 static void atl1c_configure_dma(struct atl1c_adapter *adapter)
1184 {
1185         struct atl1c_hw *hw = &adapter->hw;
1186         u32 dma_ctrl_data;
1187
1188         dma_ctrl_data = DMA_CTRL_DMAR_REQ_PRI;
1189         if (hw->ctrl_flags & ATL1C_CMB_ENABLE)
1190                 dma_ctrl_data |= DMA_CTRL_CMB_EN;
1191         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1192                 dma_ctrl_data |= DMA_CTRL_SMB_EN;
1193         else
1194                 dma_ctrl_data |= MAC_CTRL_SMB_DIS;
1195
1196         switch (hw->dma_order) {
1197         case atl1c_dma_ord_in:
1198                 dma_ctrl_data |= DMA_CTRL_DMAR_IN_ORDER;
1199                 break;
1200         case atl1c_dma_ord_enh:
1201                 dma_ctrl_data |= DMA_CTRL_DMAR_ENH_ORDER;
1202                 break;
1203         case atl1c_dma_ord_out:
1204                 dma_ctrl_data |= DMA_CTRL_DMAR_OUT_ORDER;
1205                 break;
1206         default:
1207                 break;
1208         }
1209
1210         dma_ctrl_data |= (((u32)hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1211                 << DMA_CTRL_DMAR_BURST_LEN_SHIFT;
1212         dma_ctrl_data |= (((u32)hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1213                 << DMA_CTRL_DMAW_BURST_LEN_SHIFT;
1214         dma_ctrl_data |= (((u32)hw->dmar_dly_cnt) & DMA_CTRL_DMAR_DLY_CNT_MASK)
1215                 << DMA_CTRL_DMAR_DLY_CNT_SHIFT;
1216         dma_ctrl_data |= (((u32)hw->dmaw_dly_cnt) & DMA_CTRL_DMAW_DLY_CNT_MASK)
1217                 << DMA_CTRL_DMAW_DLY_CNT_SHIFT;
1218
1219         AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data);
1220 }
1221
1222 /*
1223  * Stop the mac, transmit and receive units
1224  * hw - Struct containing variables accessed by shared code
1225  * return : 0  or  idle status (if error)
1226  */
1227 static int atl1c_stop_mac(struct atl1c_hw *hw)
1228 {
1229         u32 data;
1230
1231         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1232         data &= ~(RXQ1_CTRL_EN | RXQ2_CTRL_EN |
1233                   RXQ3_CTRL_EN | RXQ_CTRL_EN);
1234         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1235
1236         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1237         data &= ~TXQ_CTRL_EN;
1238         AT_WRITE_REG(hw, REG_TWSI_CTRL, data);
1239
1240         atl1c_wait_until_idle(hw);
1241
1242         AT_READ_REG(hw, REG_MAC_CTRL, &data);
1243         data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN);
1244         AT_WRITE_REG(hw, REG_MAC_CTRL, data);
1245
1246         return (int)atl1c_wait_until_idle(hw);
1247 }
1248
1249 static void atl1c_enable_rx_ctrl(struct atl1c_hw *hw)
1250 {
1251         u32 data;
1252
1253         AT_READ_REG(hw, REG_RXQ_CTRL, &data);
1254         switch (hw->adapter->num_rx_queues) {
1255         case 4:
1256                 data |= (RXQ3_CTRL_EN | RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1257                 break;
1258         case 3:
1259                 data |= (RXQ2_CTRL_EN | RXQ1_CTRL_EN);
1260                 break;
1261         case 2:
1262                 data |= RXQ1_CTRL_EN;
1263                 break;
1264         default:
1265                 break;
1266         }
1267         data |= RXQ_CTRL_EN;
1268         AT_WRITE_REG(hw, REG_RXQ_CTRL, data);
1269 }
1270
1271 static void atl1c_enable_tx_ctrl(struct atl1c_hw *hw)
1272 {
1273         u32 data;
1274
1275         AT_READ_REG(hw, REG_TXQ_CTRL, &data);
1276         data |= TXQ_CTRL_EN;
1277         AT_WRITE_REG(hw, REG_TXQ_CTRL, data);
1278 }
1279
1280 /*
1281  * Reset the transmit and receive units; mask and clear all interrupts.
1282  * hw - Struct containing variables accessed by shared code
1283  * return : 0  or  idle status (if error)
1284  */
1285 static int atl1c_reset_mac(struct atl1c_hw *hw)
1286 {
1287         struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
1288         struct pci_dev *pdev = adapter->pdev;
1289         u32 master_ctrl_data = 0;
1290
1291         AT_WRITE_REG(hw, REG_IMR, 0);
1292         AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
1293
1294         atl1c_stop_mac(hw);
1295         /*
1296          * Issue Soft Reset to the MAC.  This will reset the chip's
1297          * transmit, receive, DMA.  It will not effect
1298          * the current PCI configuration.  The global reset bit is self-
1299          * clearing, and should clear within a microsecond.
1300          */
1301         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
1302         master_ctrl_data |= MASTER_CTRL_OOB_DIS_OFF;
1303         AT_WRITE_REGW(hw, REG_MASTER_CTRL, ((master_ctrl_data | MASTER_CTRL_SOFT_RST)
1304                         & 0xFFFF));
1305
1306         AT_WRITE_FLUSH(hw);
1307         msleep(10);
1308         /* Wait at least 10ms for All module to be Idle */
1309
1310         if (atl1c_wait_until_idle(hw)) {
1311                 dev_err(&pdev->dev,
1312                         "MAC state machine can't be idle since"
1313                         " disabled for 10ms second\n");
1314                 return -1;
1315         }
1316         return 0;
1317 }
1318
1319 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw)
1320 {
1321         u32 pm_ctrl_data;
1322
1323         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1324         pm_ctrl_data &= ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1325                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1326         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1327         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1328         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1329         pm_ctrl_data &= ~PM_CTRL_MAC_ASPM_CHK;
1330         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1331
1332         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1333         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1334         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1335         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1336 }
1337
1338 /*
1339  * Set ASPM state.
1340  * Enable/disable L0s/L1 depend on link state.
1341  */
1342 static void atl1c_set_aspm(struct atl1c_hw *hw, bool linkup)
1343 {
1344         u32 pm_ctrl_data;
1345         u32 link_ctrl_data;
1346         u32 link_l1_timer = 0xF;
1347
1348         AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data);
1349         AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data);
1350
1351         pm_ctrl_data &= ~PM_CTRL_SERDES_PD_EX_L1;
1352         pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1353                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1354         pm_ctrl_data &= ~(PM_CTRL_LCKDET_TIMER_MASK <<
1355                         PM_CTRL_LCKDET_TIMER_SHIFT);
1356         pm_ctrl_data |= AT_LCKDET_TIMER << PM_CTRL_LCKDET_TIMER_SHIFT;
1357
1358         if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1359                 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1360                 link_ctrl_data &= ~LINK_CTRL_EXT_SYNC;
1361                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE)) {
1362                         if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10)
1363                                 link_ctrl_data |= LINK_CTRL_EXT_SYNC;
1364                 }
1365
1366                 AT_WRITE_REG(hw, REG_LINK_CTRL, link_ctrl_data);
1367
1368                 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER;
1369                 pm_ctrl_data &= ~(PM_CTRL_PM_REQ_TIMER_MASK <<
1370                         PM_CTRL_PM_REQ_TIMER_SHIFT);
1371                 pm_ctrl_data |= AT_ASPM_L1_TIMER <<
1372                         PM_CTRL_PM_REQ_TIMER_SHIFT;
1373                 pm_ctrl_data &= ~PM_CTRL_SA_DLY_EN;
1374                 pm_ctrl_data &= ~PM_CTRL_HOTRST;
1375                 pm_ctrl_data |= 1 << PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1376                 pm_ctrl_data |= PM_CTRL_SERDES_PD_EX_L1;
1377         }
1378         pm_ctrl_data |= PM_CTRL_MAC_ASPM_CHK;
1379         if (linkup) {
1380                 pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1381                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1382                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1383                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1384                 if (hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT)
1385                         pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN;
1386
1387                 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d ||
1388                         hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) {
1389                         if (hw->nic_type == athr_l2c_b)
1390                                 if (!(hw->ctrl_flags & ATL1C_APS_MODE_ENABLE))
1391                                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1392                         pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1393                         pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1394                         pm_ctrl_data &= ~PM_CTRL_SERDES_BUDS_RX_L1_EN;
1395                         pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1396                 if (hw->adapter->link_speed == SPEED_100 ||
1397                                 hw->adapter->link_speed == SPEED_1000) {
1398                                 pm_ctrl_data &=  ~(PM_CTRL_L1_ENTRY_TIMER_MASK <<
1399                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT);
1400                                 if (hw->nic_type == athr_l2c_b)
1401                                         link_l1_timer = 7;
1402                                 else if (hw->nic_type == athr_l2c_b2 ||
1403                                         hw->nic_type == athr_l1d_2)
1404                                         link_l1_timer = 4;
1405                                 pm_ctrl_data |= link_l1_timer <<
1406                                         PM_CTRL_L1_ENTRY_TIMER_SHIFT;
1407                         }
1408                 } else {
1409                         pm_ctrl_data |= PM_CTRL_SERDES_L1_EN;
1410                         pm_ctrl_data |= PM_CTRL_SERDES_PLL_L1_EN;
1411                         pm_ctrl_data |= PM_CTRL_SERDES_BUDS_RX_L1_EN;
1412                         pm_ctrl_data &= ~PM_CTRL_CLK_SWH_L1;
1413                         pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1414                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1415
1416                 }
1417         } else {
1418                 pm_ctrl_data &= ~PM_CTRL_SERDES_L1_EN;
1419                 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN;
1420                 pm_ctrl_data &= ~PM_CTRL_SERDES_PLL_L1_EN;
1421                 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1;
1422
1423                 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT)
1424                         pm_ctrl_data |= PM_CTRL_ASPM_L1_EN;
1425                 else
1426                         pm_ctrl_data &= ~PM_CTRL_ASPM_L1_EN;
1427         }
1428         AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data);
1429
1430         return;
1431 }
1432
1433 static void atl1c_setup_mac_ctrl(struct atl1c_adapter *adapter)
1434 {
1435         struct atl1c_hw *hw = &adapter->hw;
1436         struct net_device *netdev = adapter->netdev;
1437         u32 mac_ctrl_data;
1438
1439         mac_ctrl_data = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1440         mac_ctrl_data |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1441
1442         if (adapter->link_duplex == FULL_DUPLEX) {
1443                 hw->mac_duplex = true;
1444                 mac_ctrl_data |= MAC_CTRL_DUPLX;
1445         }
1446
1447         if (adapter->link_speed == SPEED_1000)
1448                 hw->mac_speed = atl1c_mac_speed_1000;
1449         else
1450                 hw->mac_speed = atl1c_mac_speed_10_100;
1451
1452         mac_ctrl_data |= (hw->mac_speed & MAC_CTRL_SPEED_MASK) <<
1453                         MAC_CTRL_SPEED_SHIFT;
1454
1455         mac_ctrl_data |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1456         mac_ctrl_data |= ((hw->preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1457                         MAC_CTRL_PRMLEN_SHIFT);
1458
1459         __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
1460
1461         mac_ctrl_data |= MAC_CTRL_BC_EN;
1462         if (netdev->flags & IFF_PROMISC)
1463                 mac_ctrl_data |= MAC_CTRL_PROMIS_EN;
1464         if (netdev->flags & IFF_ALLMULTI)
1465                 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN;
1466
1467         mac_ctrl_data |= MAC_CTRL_SINGLE_PAUSE_EN;
1468         if (hw->nic_type == athr_l1d || hw->nic_type == athr_l2c_b2 ||
1469             hw->nic_type == athr_l1d_2) {
1470                 mac_ctrl_data |= MAC_CTRL_SPEED_MODE_SW;
1471                 mac_ctrl_data |= MAC_CTRL_HASH_ALG_CRC32;
1472         }
1473         AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
1474 }
1475
1476 /*
1477  * atl1c_configure - Configure Transmit&Receive Unit after Reset
1478  * @adapter: board private structure
1479  *
1480  * Configure the Tx /Rx unit of the MAC after a reset.
1481  */
1482 static int atl1c_configure(struct atl1c_adapter *adapter)
1483 {
1484         struct atl1c_hw *hw = &adapter->hw;
1485         u32 master_ctrl_data = 0;
1486         u32 intr_modrt_data;
1487         u32 data;
1488
1489         /* clear interrupt status */
1490         AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF);
1491         /*  Clear any WOL status */
1492         AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
1493         /* set Interrupt Clear Timer
1494          * HW will enable self to assert interrupt event to system after
1495          * waiting x-time for software to notify it accept interrupt.
1496          */
1497
1498         data = CLK_GATING_EN_ALL;
1499         if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) {
1500                 if (hw->nic_type == athr_l2c_b)
1501                         data &= ~CLK_GATING_RXMAC_EN;
1502         } else
1503                 data = 0;
1504         AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data);
1505
1506         AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER,
1507                 hw->ict & INT_RETRIG_TIMER_MASK);
1508
1509         atl1c_configure_des_ring(adapter);
1510
1511         if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) {
1512                 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) <<
1513                                         IRQ_MODRT_TX_TIMER_SHIFT;
1514                 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) <<
1515                                         IRQ_MODRT_RX_TIMER_SHIFT;
1516                 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data);
1517                 master_ctrl_data |=
1518                         MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN;
1519         }
1520
1521         if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ)
1522                 master_ctrl_data |= MASTER_CTRL_INT_RDCLR;
1523
1524         master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN;
1525         AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
1526
1527         if (hw->ctrl_flags & ATL1C_CMB_ENABLE) {
1528                 AT_WRITE_REG(hw, REG_CMB_TPD_THRESH,
1529                         hw->cmb_tpd & CMB_TPD_THRESH_MASK);
1530                 AT_WRITE_REG(hw, REG_CMB_TX_TIMER,
1531                         hw->cmb_tx_timer & CMB_TX_TIMER_MASK);
1532         }
1533
1534         if (hw->ctrl_flags & ATL1C_SMB_ENABLE)
1535                 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER,
1536                         hw->smb_timer & SMB_STAT_TIMER_MASK);
1537         /* set MTU */
1538         AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN +
1539                         VLAN_HLEN + ETH_FCS_LEN);
1540         /* HDS, disable */
1541         AT_WRITE_REG(hw, REG_HDS_CTRL, 0);
1542
1543         atl1c_configure_tx(adapter);
1544         atl1c_configure_rx(adapter);
1545         atl1c_configure_rss(adapter);
1546         atl1c_configure_dma(adapter);
1547
1548         return 0;
1549 }
1550
1551 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter)
1552 {
1553         u16 hw_reg_addr = 0;
1554         unsigned long *stats_item = NULL;
1555         u32 data;
1556
1557         /* update rx status */
1558         hw_reg_addr = REG_MAC_RX_STATUS_BIN;
1559         stats_item  = &adapter->hw_stats.rx_ok;
1560         while (hw_reg_addr <= REG_MAC_RX_STATUS_END) {
1561                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1562                 *stats_item += data;
1563                 stats_item++;
1564                 hw_reg_addr += 4;
1565         }
1566 /* update tx status */
1567         hw_reg_addr = REG_MAC_TX_STATUS_BIN;
1568         stats_item  = &adapter->hw_stats.tx_ok;
1569         while (hw_reg_addr <= REG_MAC_TX_STATUS_END) {
1570                 AT_READ_REG(&adapter->hw, hw_reg_addr, &data);
1571                 *stats_item += data;
1572                 stats_item++;
1573                 hw_reg_addr += 4;
1574         }
1575 }
1576
1577 /*
1578  * atl1c_get_stats - Get System Network Statistics
1579  * @netdev: network interface device structure
1580  *
1581  * Returns the address of the device statistics structure.
1582  * The statistics are actually updated from the timer callback.
1583  */
1584 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev)
1585 {
1586         struct atl1c_adapter *adapter = netdev_priv(netdev);
1587         struct atl1c_hw_stats  *hw_stats = &adapter->hw_stats;
1588         struct net_device_stats *net_stats = &netdev->stats;
1589
1590         atl1c_update_hw_stats(adapter);
1591         net_stats->rx_packets = hw_stats->rx_ok;
1592         net_stats->tx_packets = hw_stats->tx_ok;
1593         net_stats->rx_bytes   = hw_stats->rx_byte_cnt;
1594         net_stats->tx_bytes   = hw_stats->tx_byte_cnt;
1595         net_stats->multicast  = hw_stats->rx_mcast;
1596         net_stats->collisions = hw_stats->tx_1_col +
1597                                 hw_stats->tx_2_col * 2 +
1598                                 hw_stats->tx_late_col + hw_stats->tx_abort_col;
1599         net_stats->rx_errors  = hw_stats->rx_frag + hw_stats->rx_fcs_err +
1600                                 hw_stats->rx_len_err + hw_stats->rx_sz_ov +
1601                                 hw_stats->rx_rrd_ov + hw_stats->rx_align_err;
1602         net_stats->rx_fifo_errors   = hw_stats->rx_rxf_ov;
1603         net_stats->rx_length_errors = hw_stats->rx_len_err;
1604         net_stats->rx_crc_errors    = hw_stats->rx_fcs_err;
1605         net_stats->rx_frame_errors  = hw_stats->rx_align_err;
1606         net_stats->rx_over_errors   = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1607
1608         net_stats->rx_missed_errors = hw_stats->rx_rrd_ov + hw_stats->rx_rxf_ov;
1609
1610         net_stats->tx_errors = hw_stats->tx_late_col + hw_stats->tx_abort_col +
1611                                 hw_stats->tx_underrun + hw_stats->tx_trunc;
1612         net_stats->tx_fifo_errors    = hw_stats->tx_underrun;
1613         net_stats->tx_aborted_errors = hw_stats->tx_abort_col;
1614         net_stats->tx_window_errors  = hw_stats->tx_late_col;
1615
1616         return net_stats;
1617 }
1618
1619 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter)
1620 {
1621         u16 phy_data;
1622
1623         spin_lock(&adapter->mdio_lock);
1624         atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data);
1625         spin_unlock(&adapter->mdio_lock);
1626 }
1627
1628 static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
1629                                 enum atl1c_trans_queue type)
1630 {
1631         struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
1632                                 &adapter->tpd_ring[type];
1633         struct atl1c_buffer *buffer_info;
1634         struct pci_dev *pdev = adapter->pdev;
1635         u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1636         u16 hw_next_to_clean;
1637         u16 shift;
1638         u32 data;
1639
1640         if (type == atl1c_trans_high)
1641                 shift = MB_HTPD_CONS_IDX_SHIFT;
1642         else
1643                 shift = MB_NTPD_CONS_IDX_SHIFT;
1644
1645         AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
1646         hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
1647
1648         while (next_to_clean != hw_next_to_clean) {
1649                 buffer_info = &tpd_ring->buffer_info[next_to_clean];
1650                 atl1c_clean_buffer(pdev, buffer_info, 1);
1651                 if (++next_to_clean == tpd_ring->count)
1652                         next_to_clean = 0;
1653                 atomic_set(&tpd_ring->next_to_clean, next_to_clean);
1654         }
1655
1656         if (netif_queue_stopped(adapter->netdev) &&
1657                         netif_carrier_ok(adapter->netdev)) {
1658                 netif_wake_queue(adapter->netdev);
1659         }
1660
1661         return true;
1662 }
1663
1664 /*
1665  * atl1c_intr - Interrupt Handler
1666  * @irq: interrupt number
1667  * @data: pointer to a network interface device structure
1668  * @pt_regs: CPU registers structure
1669  */
1670 static irqreturn_t atl1c_intr(int irq, void *data)
1671 {
1672         struct net_device *netdev  = data;
1673         struct atl1c_adapter *adapter = netdev_priv(netdev);
1674         struct pci_dev *pdev = adapter->pdev;
1675         struct atl1c_hw *hw = &adapter->hw;
1676         int max_ints = AT_MAX_INT_WORK;
1677         int handled = IRQ_NONE;
1678         u32 status;
1679         u32 reg_data;
1680
1681         do {
1682                 AT_READ_REG(hw, REG_ISR, &reg_data);
1683                 status = reg_data & hw->intr_mask;
1684
1685                 if (status == 0 || (status & ISR_DIS_INT) != 0) {
1686                         if (max_ints != AT_MAX_INT_WORK)
1687                                 handled = IRQ_HANDLED;
1688                         break;
1689                 }
1690                 /* link event */
1691                 if (status & ISR_GPHY)
1692                         atl1c_clear_phy_int(adapter);
1693                 /* Ack ISR */
1694                 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
1695                 if (status & ISR_RX_PKT) {
1696                         if (likely(napi_schedule_prep(&adapter->napi))) {
1697                                 hw->intr_mask &= ~ISR_RX_PKT;
1698                                 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask);
1699                                 __napi_schedule(&adapter->napi);
1700                         }
1701                 }
1702                 if (status & ISR_TX_PKT)
1703                         atl1c_clean_tx_irq(adapter, atl1c_trans_normal);
1704
1705                 handled = IRQ_HANDLED;
1706                 /* check if PCIE PHY Link down */
1707                 if (status & ISR_ERROR) {
1708                         if (netif_msg_hw(adapter))
1709                                 dev_err(&pdev->dev,
1710                                         "atl1c hardware error (status = 0x%x)\n",
1711                                         status & ISR_ERROR);
1712                         /* reset MAC */
1713                         adapter->work_event |= ATL1C_WORK_EVENT_RESET;
1714                         schedule_work(&adapter->common_task);
1715                         return IRQ_HANDLED;
1716                 }
1717
1718                 if (status & ISR_OVER)
1719                         if (netif_msg_intr(adapter))
1720                                 dev_warn(&pdev->dev,
1721                                         "TX/RX overflow (status = 0x%x)\n",
1722                                         status & ISR_OVER);
1723
1724                 /* link event */
1725                 if (status & (ISR_GPHY | ISR_MANUAL)) {
1726                         netdev->stats.tx_carrier_errors++;
1727                         atl1c_link_chg_event(adapter);
1728                         break;
1729                 }
1730
1731         } while (--max_ints > 0);
1732         /* re-enable Interrupt*/
1733         AT_WRITE_REG(&adapter->hw, REG_ISR, 0);
1734         return handled;
1735 }
1736
1737 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter,
1738                   struct sk_buff *skb, struct atl1c_recv_ret_status *prrs)
1739 {
1740         /*
1741          * The pid field in RRS in not correct sometimes, so we
1742          * cannot figure out if the packet is fragmented or not,
1743          * so we tell the KERNEL CHECKSUM_NONE
1744          */
1745         skb_checksum_none_assert(skb);
1746 }
1747
1748 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, const int ringid)
1749 {
1750         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[ringid];
1751         struct pci_dev *pdev = adapter->pdev;
1752         struct atl1c_buffer *buffer_info, *next_info;
1753         struct sk_buff *skb;
1754         void *vir_addr = NULL;
1755         u16 num_alloc = 0;
1756         u16 rfd_next_to_use, next_next;
1757         struct atl1c_rx_free_desc *rfd_desc;
1758
1759         next_next = rfd_next_to_use = rfd_ring->next_to_use;
1760         if (++next_next == rfd_ring->count)
1761                 next_next = 0;
1762         buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1763         next_info = &rfd_ring->buffer_info[next_next];
1764
1765         while (next_info->flags & ATL1C_BUFFER_FREE) {
1766                 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use);
1767
1768                 skb = dev_alloc_skb(adapter->rx_buffer_len);
1769                 if (unlikely(!skb)) {
1770                         if (netif_msg_rx_err(adapter))
1771                                 dev_warn(&pdev->dev, "alloc rx buffer failed\n");
1772                         break;
1773                 }
1774
1775                 /*
1776                  * Make buffer alignment 2 beyond a 16 byte boundary
1777                  * this will result in a 16 byte aligned IP header after
1778                  * the 14 byte MAC header is removed
1779                  */
1780                 vir_addr = skb->data;
1781                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
1782                 buffer_info->skb = skb;
1783                 buffer_info->length = adapter->rx_buffer_len;
1784                 buffer_info->dma = pci_map_single(pdev, vir_addr,
1785                                                 buffer_info->length,
1786                                                 PCI_DMA_FROMDEVICE);
1787                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
1788                         ATL1C_PCIMAP_FROMDEVICE);
1789                 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1790                 rfd_next_to_use = next_next;
1791                 if (++next_next == rfd_ring->count)
1792                         next_next = 0;
1793                 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1794                 next_info = &rfd_ring->buffer_info[next_next];
1795                 num_alloc++;
1796         }
1797
1798         if (num_alloc) {
1799                 /* TODO: update mailbox here */
1800                 wmb();
1801                 rfd_ring->next_to_use = rfd_next_to_use;
1802                 AT_WRITE_REG(&adapter->hw, atl1c_rfd_prod_idx_regs[ringid],
1803                         rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK);
1804         }
1805
1806         return num_alloc;
1807 }
1808
1809 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring,
1810                         struct  atl1c_recv_ret_status *rrs, u16 num)
1811 {
1812         u16 i;
1813         /* the relationship between rrd and rfd is one map one */
1814         for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring,
1815                                         rrd_ring->next_to_clean)) {
1816                 rrs->word3 &= ~RRS_RXD_UPDATED;
1817                 if (++rrd_ring->next_to_clean == rrd_ring->count)
1818                         rrd_ring->next_to_clean = 0;
1819         }
1820 }
1821
1822 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring,
1823         struct atl1c_recv_ret_status *rrs, u16 num)
1824 {
1825         u16 i;
1826         u16 rfd_index;
1827         struct atl1c_buffer *buffer_info = rfd_ring->buffer_info;
1828
1829         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1830                         RRS_RX_RFD_INDEX_MASK;
1831         for (i = 0; i < num; i++) {
1832                 buffer_info[rfd_index].skb = NULL;
1833                 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index],
1834                                         ATL1C_BUFFER_FREE);
1835                 if (++rfd_index == rfd_ring->count)
1836                         rfd_index = 0;
1837         }
1838         rfd_ring->next_to_clean = rfd_index;
1839 }
1840
1841 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, u8 que,
1842                    int *work_done, int work_to_do)
1843 {
1844         u16 rfd_num, rfd_index;
1845         u16 count = 0;
1846         u16 length;
1847         struct pci_dev *pdev = adapter->pdev;
1848         struct net_device *netdev  = adapter->netdev;
1849         struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring[que];
1850         struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring[que];
1851         struct sk_buff *skb;
1852         struct atl1c_recv_ret_status *rrs;
1853         struct atl1c_buffer *buffer_info;
1854
1855         while (1) {
1856                 if (*work_done >= work_to_do)
1857                         break;
1858                 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean);
1859                 if (likely(RRS_RXD_IS_VALID(rrs->word3))) {
1860                         rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) &
1861                                 RRS_RX_RFD_CNT_MASK;
1862                         if (unlikely(rfd_num != 1))
1863                                 /* TODO support mul rfd*/
1864                                 if (netif_msg_rx_err(adapter))
1865                                         dev_warn(&pdev->dev,
1866                                                 "Multi rfd not support yet!\n");
1867                         goto rrs_checked;
1868                 } else {
1869                         break;
1870                 }
1871 rrs_checked:
1872                 atl1c_clean_rrd(rrd_ring, rrs, rfd_num);
1873                 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) {
1874                         atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1875                                 if (netif_msg_rx_err(adapter))
1876                                         dev_warn(&pdev->dev,
1877                                                 "wrong packet! rrs word3 is %x\n",
1878                                                 rrs->word3);
1879                         continue;
1880                 }
1881
1882                 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) &
1883                                 RRS_PKT_SIZE_MASK);
1884                 /* Good Receive */
1885                 if (likely(rfd_num == 1)) {
1886                         rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) &
1887                                         RRS_RX_RFD_INDEX_MASK;
1888                         buffer_info = &rfd_ring->buffer_info[rfd_index];
1889                         pci_unmap_single(pdev, buffer_info->dma,
1890                                 buffer_info->length, PCI_DMA_FROMDEVICE);
1891                         skb = buffer_info->skb;
1892                 } else {
1893                         /* TODO */
1894                         if (netif_msg_rx_err(adapter))
1895                                 dev_warn(&pdev->dev,
1896                                         "Multi rfd not support yet!\n");
1897                         break;
1898                 }
1899                 atl1c_clean_rfd(rfd_ring, rrs, rfd_num);
1900                 skb_put(skb, length - ETH_FCS_LEN);
1901                 skb->protocol = eth_type_trans(skb, netdev);
1902                 atl1c_rx_checksum(adapter, skb, rrs);
1903                 if (rrs->word3 & RRS_VLAN_INS) {
1904                         u16 vlan;
1905
1906                         AT_TAG_TO_VLAN(rrs->vlan_tag, vlan);
1907                         vlan = le16_to_cpu(vlan);
1908                         __vlan_hwaccel_put_tag(skb, vlan);
1909                 }
1910                 netif_receive_skb(skb);
1911
1912                 (*work_done)++;
1913                 count++;
1914         }
1915         if (count)
1916                 atl1c_alloc_rx_buffer(adapter, que);
1917 }
1918
1919 /*
1920  * atl1c_clean - NAPI Rx polling callback
1921  * @adapter: board private structure
1922  */
1923 static int atl1c_clean(struct napi_struct *napi, int budget)
1924 {
1925         struct atl1c_adapter *adapter =
1926                         container_of(napi, struct atl1c_adapter, napi);
1927         int work_done = 0;
1928
1929         /* Keep link state information with original netdev */
1930         if (!netif_carrier_ok(adapter->netdev))
1931                 goto quit_polling;
1932         /* just enable one RXQ */
1933         atl1c_clean_rx_irq(adapter, 0, &work_done, budget);
1934
1935         if (work_done < budget) {
1936 quit_polling:
1937                 napi_complete(napi);
1938                 adapter->hw.intr_mask |= ISR_RX_PKT;
1939                 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask);
1940         }
1941         return work_done;
1942 }
1943
1944 #ifdef CONFIG_NET_POLL_CONTROLLER
1945
1946 /*
1947  * Polling 'interrupt' - used by things like netconsole to send skbs
1948  * without having to re-enable interrupts. It's not called while
1949  * the interrupt routine is executing.
1950  */
1951 static void atl1c_netpoll(struct net_device *netdev)
1952 {
1953         struct atl1c_adapter *adapter = netdev_priv(netdev);
1954
1955         disable_irq(adapter->pdev->irq);
1956         atl1c_intr(adapter->pdev->irq, netdev);
1957         enable_irq(adapter->pdev->irq);
1958 }
1959 #endif
1960
1961 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type)
1962 {
1963         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1964         u16 next_to_use = 0;
1965         u16 next_to_clean = 0;
1966
1967         next_to_clean = atomic_read(&tpd_ring->next_to_clean);
1968         next_to_use   = tpd_ring->next_to_use;
1969
1970         return (u16)(next_to_clean > next_to_use) ?
1971                 (next_to_clean - next_to_use - 1) :
1972                 (tpd_ring->count + next_to_clean - next_to_use - 1);
1973 }
1974
1975 /*
1976  * get next usable tpd
1977  * Note: should call atl1c_tdp_avail to make sure
1978  * there is enough tpd to use
1979  */
1980 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter,
1981         enum atl1c_trans_queue type)
1982 {
1983         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
1984         struct atl1c_tpd_desc *tpd_desc;
1985         u16 next_to_use = 0;
1986
1987         next_to_use = tpd_ring->next_to_use;
1988         if (++tpd_ring->next_to_use == tpd_ring->count)
1989                 tpd_ring->next_to_use = 0;
1990         tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use);
1991         memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc));
1992         return  tpd_desc;
1993 }
1994
1995 static struct atl1c_buffer *
1996 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd)
1997 {
1998         struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring;
1999
2000         return &tpd_ring->buffer_info[tpd -
2001                         (struct atl1c_tpd_desc *)tpd_ring->desc];
2002 }
2003
2004 /* Calculate the transmit packet descript needed*/
2005 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
2006 {
2007         u16 tpd_req;
2008         u16 proto_hdr_len = 0;
2009
2010         tpd_req = skb_shinfo(skb)->nr_frags + 1;
2011
2012         if (skb_is_gso(skb)) {
2013                 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2014                 if (proto_hdr_len < skb_headlen(skb))
2015                         tpd_req++;
2016                 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
2017                         tpd_req++;
2018         }
2019         return tpd_req;
2020 }
2021
2022 static int atl1c_tso_csum(struct atl1c_adapter *adapter,
2023                           struct sk_buff *skb,
2024                           struct atl1c_tpd_desc **tpd,
2025                           enum atl1c_trans_queue type)
2026 {
2027         struct pci_dev *pdev = adapter->pdev;
2028         u8 hdr_len;
2029         u32 real_len;
2030         unsigned short offload_type;
2031         int err;
2032
2033         if (skb_is_gso(skb)) {
2034                 if (skb_header_cloned(skb)) {
2035                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2036                         if (unlikely(err))
2037                                 return -1;
2038                 }
2039                 offload_type = skb_shinfo(skb)->gso_type;
2040
2041                 if (offload_type & SKB_GSO_TCPV4) {
2042                         real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
2043                                         + ntohs(ip_hdr(skb)->tot_len));
2044
2045                         if (real_len < skb->len)
2046                                 pskb_trim(skb, real_len);
2047
2048                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2049                         if (unlikely(skb->len == hdr_len)) {
2050                                 /* only xsum need */
2051                                 if (netif_msg_tx_queued(adapter))
2052                                         dev_warn(&pdev->dev,
2053                                                 "IPV4 tso with zero data??\n");
2054                                 goto check_sum;
2055                         } else {
2056                                 ip_hdr(skb)->check = 0;
2057                                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(
2058                                                         ip_hdr(skb)->saddr,
2059                                                         ip_hdr(skb)->daddr,
2060                                                         0, IPPROTO_TCP, 0);
2061                                 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT;
2062                         }
2063                 }
2064
2065                 if (offload_type & SKB_GSO_TCPV6) {
2066                         struct atl1c_tpd_ext_desc *etpd =
2067                                 *(struct atl1c_tpd_ext_desc **)(tpd);
2068
2069                         memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc));
2070                         *tpd = atl1c_get_tpd(adapter, type);
2071                         ipv6_hdr(skb)->payload_len = 0;
2072                         /* check payload == 0 byte ? */
2073                         hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
2074                         if (unlikely(skb->len == hdr_len)) {
2075                                 /* only xsum need */
2076                                 if (netif_msg_tx_queued(adapter))
2077                                         dev_warn(&pdev->dev,
2078                                                 "IPV6 tso with zero data??\n");
2079                                 goto check_sum;
2080                         } else
2081                                 tcp_hdr(skb)->check = ~csum_ipv6_magic(
2082                                                 &ipv6_hdr(skb)->saddr,
2083                                                 &ipv6_hdr(skb)->daddr,
2084                                                 0, IPPROTO_TCP, 0);
2085                         etpd->word1 |= 1 << TPD_LSO_EN_SHIFT;
2086                         etpd->word1 |= 1 << TPD_LSO_VER_SHIFT;
2087                         etpd->pkt_len = cpu_to_le32(skb->len);
2088                         (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT;
2089                 }
2090
2091                 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT;
2092                 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) <<
2093                                 TPD_TCPHDR_OFFSET_SHIFT;
2094                 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) <<
2095                                 TPD_MSS_SHIFT;
2096                 return 0;
2097         }
2098
2099 check_sum:
2100         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2101                 u8 css, cso;
2102                 cso = skb_checksum_start_offset(skb);
2103
2104                 if (unlikely(cso & 0x1)) {
2105                         if (netif_msg_tx_err(adapter))
2106                                 dev_err(&adapter->pdev->dev,
2107                                         "payload offset should not an event number\n");
2108                         return -1;
2109                 } else {
2110                         css = cso + skb->csum_offset;
2111
2112                         (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) <<
2113                                         TPD_PLOADOFFSET_SHIFT;
2114                         (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) <<
2115                                         TPD_CCSUM_OFFSET_SHIFT;
2116                         (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT;
2117                 }
2118         }
2119         return 0;
2120 }
2121
2122 static void atl1c_tx_map(struct atl1c_adapter *adapter,
2123                       struct sk_buff *skb, struct atl1c_tpd_desc *tpd,
2124                         enum atl1c_trans_queue type)
2125 {
2126         struct atl1c_tpd_desc *use_tpd = NULL;
2127         struct atl1c_buffer *buffer_info = NULL;
2128         u16 buf_len = skb_headlen(skb);
2129         u16 map_len = 0;
2130         u16 mapped_len = 0;
2131         u16 hdr_len = 0;
2132         u16 nr_frags;
2133         u16 f;
2134         int tso;
2135
2136         nr_frags = skb_shinfo(skb)->nr_frags;
2137         tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
2138         if (tso) {
2139                 /* TSO */
2140                 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2141                 use_tpd = tpd;
2142
2143                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2144                 buffer_info->length = map_len;
2145                 buffer_info->dma = pci_map_single(adapter->pdev,
2146                                         skb->data, hdr_len, PCI_DMA_TODEVICE);
2147                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2148                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2149                         ATL1C_PCIMAP_TODEVICE);
2150                 mapped_len += map_len;
2151                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2152                 use_tpd->buffer_len = cpu_to_le16(buffer_info->length);
2153         }
2154
2155         if (mapped_len < buf_len) {
2156                 /* mapped_len == 0, means we should use the first tpd,
2157                    which is given by caller  */
2158                 if (mapped_len == 0)
2159                         use_tpd = tpd;
2160                 else {
2161                         use_tpd = atl1c_get_tpd(adapter, type);
2162                         memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2163                 }
2164                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2165                 buffer_info->length = buf_len - mapped_len;
2166                 buffer_info->dma =
2167                         pci_map_single(adapter->pdev, skb->data + mapped_len,
2168                                         buffer_info->length, PCI_DMA_TODEVICE);
2169                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2170                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE,
2171                         ATL1C_PCIMAP_TODEVICE);
2172                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2173                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2174         }
2175
2176         for (f = 0; f < nr_frags; f++) {
2177                 struct skb_frag_struct *frag;
2178
2179                 frag = &skb_shinfo(skb)->frags[f];
2180
2181                 use_tpd = atl1c_get_tpd(adapter, type);
2182                 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc));
2183
2184                 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);
2185                 buffer_info->length = skb_frag_size(frag);
2186                 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2187                                                     frag, 0,
2188                                                     buffer_info->length,
2189                                                     DMA_TO_DEVICE);
2190                 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY);
2191                 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE,
2192                         ATL1C_PCIMAP_TODEVICE);
2193                 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2194                 use_tpd->buffer_len  = cpu_to_le16(buffer_info->length);
2195         }
2196
2197         /* The last tpd */
2198         use_tpd->word1 |= 1 << TPD_EOP_SHIFT;
2199         /* The last buffer info contain the skb address,
2200            so it will be free after unmap */
2201         buffer_info->skb = skb;
2202 }
2203
2204 static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
2205                            struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
2206 {
2207         struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
2208         u32 prod_data;
2209
2210         AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
2211         switch (type) {
2212         case atl1c_trans_high:
2213                 prod_data &= 0xFFFF0000;
2214                 prod_data |= tpd_ring->next_to_use & 0xFFFF;
2215                 break;
2216         case atl1c_trans_normal:
2217                 prod_data &= 0x0000FFFF;
2218                 prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
2219                 break;
2220         default:
2221                 break;
2222         }
2223         wmb();
2224         AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
2225 }
2226
2227 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
2228                                           struct net_device *netdev)
2229 {
2230         struct atl1c_adapter *adapter = netdev_priv(netdev);
2231         unsigned long flags;
2232         u16 tpd_req = 1;
2233         struct atl1c_tpd_desc *tpd;
2234         enum atl1c_trans_queue type = atl1c_trans_normal;
2235
2236         if (test_bit(__AT_DOWN, &adapter->flags)) {
2237                 dev_kfree_skb_any(skb);
2238                 return NETDEV_TX_OK;
2239         }
2240
2241         tpd_req = atl1c_cal_tpd_req(skb);
2242         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
2243                 if (netif_msg_pktdata(adapter))
2244                         dev_info(&adapter->pdev->dev, "tx locked\n");
2245                 return NETDEV_TX_LOCKED;
2246         }
2247
2248         if (atl1c_tpd_avail(adapter, type) < tpd_req) {
2249                 /* no enough descriptor, just stop queue */
2250                 netif_stop_queue(netdev);
2251                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2252                 return NETDEV_TX_BUSY;
2253         }
2254
2255         tpd = atl1c_get_tpd(adapter, type);
2256
2257         /* do TSO and check sum */
2258         if (atl1c_tso_csum(adapter, skb, &tpd, type) != 0) {
2259                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2260                 dev_kfree_skb_any(skb);
2261                 return NETDEV_TX_OK;
2262         }
2263
2264         if (unlikely(vlan_tx_tag_present(skb))) {
2265                 u16 vlan = vlan_tx_tag_get(skb);
2266                 __le16 tag;
2267
2268                 vlan = cpu_to_le16(vlan);
2269                 AT_VLAN_TO_TAG(vlan, tag);
2270                 tpd->word1 |= 1 << TPD_INS_VTAG_SHIFT;
2271                 tpd->vlan_tag = tag;
2272         }
2273
2274         if (skb_network_offset(skb) != ETH_HLEN)
2275                 tpd->word1 |= 1 << TPD_ETH_TYPE_SHIFT; /* Ethernet frame */
2276
2277         atl1c_tx_map(adapter, skb, tpd, type);
2278         atl1c_tx_queue(adapter, skb, tpd, type);
2279
2280         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2281         return NETDEV_TX_OK;
2282 }
2283
2284 static void atl1c_free_irq(struct atl1c_adapter *adapter)
2285 {
2286         struct net_device *netdev = adapter->netdev;
2287
2288         free_irq(adapter->pdev->irq, netdev);
2289
2290         if (adapter->have_msi)
2291                 pci_disable_msi(adapter->pdev);
2292 }
2293
2294 static int atl1c_request_irq(struct atl1c_adapter *adapter)
2295 {
2296         struct pci_dev    *pdev   = adapter->pdev;
2297         struct net_device *netdev = adapter->netdev;
2298         int flags = 0;
2299         int err = 0;
2300
2301         adapter->have_msi = true;
2302         err = pci_enable_msi(adapter->pdev);
2303         if (err) {
2304                 if (netif_msg_ifup(adapter))
2305                         dev_err(&pdev->dev,
2306                                 "Unable to allocate MSI interrupt Error: %d\n",
2307                                 err);
2308                 adapter->have_msi = false;
2309         } else
2310                 netdev->irq = pdev->irq;
2311
2312         if (!adapter->have_msi)
2313                 flags |= IRQF_SHARED;
2314         err = request_irq(adapter->pdev->irq, atl1c_intr, flags,
2315                         netdev->name, netdev);
2316         if (err) {
2317                 if (netif_msg_ifup(adapter))
2318                         dev_err(&pdev->dev,
2319                                 "Unable to allocate interrupt Error: %d\n",
2320                                 err);
2321                 if (adapter->have_msi)
2322                         pci_disable_msi(adapter->pdev);
2323                 return err;
2324         }
2325         if (netif_msg_ifup(adapter))
2326                 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n");
2327         return err;
2328 }
2329
2330 static int atl1c_up(struct atl1c_adapter *adapter)
2331 {
2332         struct net_device *netdev = adapter->netdev;
2333         int num;
2334         int err;
2335         int i;
2336
2337         netif_carrier_off(netdev);
2338         atl1c_init_ring_ptrs(adapter);
2339         atl1c_set_multi(netdev);
2340         atl1c_restore_vlan(adapter);
2341
2342         for (i = 0; i < adapter->num_rx_queues; i++) {
2343                 num = atl1c_alloc_rx_buffer(adapter, i);
2344                 if (unlikely(num == 0)) {
2345                         err = -ENOMEM;
2346                         goto err_alloc_rx;
2347                 }
2348         }
2349
2350         if (atl1c_configure(adapter)) {
2351                 err = -EIO;
2352                 goto err_up;
2353         }
2354
2355         err = atl1c_request_irq(adapter);
2356         if (unlikely(err))
2357                 goto err_up;
2358
2359         clear_bit(__AT_DOWN, &adapter->flags);
2360         napi_enable(&adapter->napi);
2361         atl1c_irq_enable(adapter);
2362         atl1c_check_link_status(adapter);
2363         netif_start_queue(netdev);
2364         return err;
2365
2366 err_up:
2367 err_alloc_rx:
2368         atl1c_clean_rx_ring(adapter);
2369         return err;
2370 }
2371
2372 static void atl1c_down(struct atl1c_adapter *adapter)
2373 {
2374         struct net_device *netdev = adapter->netdev;
2375
2376         atl1c_del_timer(adapter);
2377         adapter->work_event = 0; /* clear all event */
2378         /* signal that we're down so the interrupt handler does not
2379          * reschedule our watchdog timer */
2380         set_bit(__AT_DOWN, &adapter->flags);
2381         netif_carrier_off(netdev);
2382         napi_disable(&adapter->napi);
2383         atl1c_irq_disable(adapter);
2384         atl1c_free_irq(adapter);
2385         /* reset MAC to disable all RX/TX */
2386         atl1c_reset_mac(&adapter->hw);
2387         msleep(1);
2388
2389         adapter->link_speed = SPEED_0;
2390         adapter->link_duplex = -1;
2391         atl1c_clean_tx_ring(adapter, atl1c_trans_normal);
2392         atl1c_clean_tx_ring(adapter, atl1c_trans_high);
2393         atl1c_clean_rx_ring(adapter);
2394 }
2395
2396 /*
2397  * atl1c_open - Called when a network interface is made active
2398  * @netdev: network interface device structure
2399  *
2400  * Returns 0 on success, negative value on failure
2401  *
2402  * The open entry point is called when a network interface is made
2403  * active by the system (IFF_UP).  At this point all resources needed
2404  * for transmit and receive operations are allocated, the interrupt
2405  * handler is registered with the OS, the watchdog timer is started,
2406  * and the stack is notified that the interface is ready.
2407  */
2408 static int atl1c_open(struct net_device *netdev)
2409 {
2410         struct atl1c_adapter *adapter = netdev_priv(netdev);
2411         int err;
2412
2413         /* disallow open during test */
2414         if (test_bit(__AT_TESTING, &adapter->flags))
2415                 return -EBUSY;
2416
2417         /* allocate rx/tx dma buffer & descriptors */
2418         err = atl1c_setup_ring_resources(adapter);
2419         if (unlikely(err))
2420                 return err;
2421
2422         err = atl1c_up(adapter);
2423         if (unlikely(err))
2424                 goto err_up;
2425
2426         if (adapter->hw.ctrl_flags & ATL1C_FPGA_VERSION) {
2427                 u32 phy_data;
2428
2429                 AT_READ_REG(&adapter->hw, REG_MDIO_CTRL, &phy_data);
2430                 phy_data |= MDIO_AP_EN;
2431                 AT_WRITE_REG(&adapter->hw, REG_MDIO_CTRL, phy_data);
2432         }
2433         return 0;
2434
2435 err_up:
2436         atl1c_free_irq(adapter);
2437         atl1c_free_ring_resources(adapter);
2438         atl1c_reset_mac(&adapter->hw);
2439         return err;
2440 }
2441
2442 /*
2443  * atl1c_close - Disables a network interface
2444  * @netdev: network interface device structure
2445  *
2446  * Returns 0, this is not allowed to fail
2447  *
2448  * The close entry point is called when an interface is de-activated
2449  * by the OS.  The hardware is still under the drivers control, but
2450  * needs to be disabled.  A global MAC reset is issued to stop the
2451  * hardware, and all transmit and receive resources are freed.
2452  */
2453 static int atl1c_close(struct net_device *netdev)
2454 {
2455         struct atl1c_adapter *adapter = netdev_priv(netdev);
2456
2457         WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2458         atl1c_down(adapter);
2459         atl1c_free_ring_resources(adapter);
2460         return 0;
2461 }
2462
2463 static int atl1c_suspend(struct device *dev)
2464 {
2465         struct pci_dev *pdev = to_pci_dev(dev);
2466         struct net_device *netdev = pci_get_drvdata(pdev);
2467         struct atl1c_adapter *adapter = netdev_priv(netdev);
2468         struct atl1c_hw *hw = &adapter->hw;
2469         u32 mac_ctrl_data = 0;
2470         u32 master_ctrl_data = 0;
2471         u32 wol_ctrl_data = 0;
2472         u16 mii_intr_status_data = 0;
2473         u32 wufc = adapter->wol;
2474
2475         atl1c_disable_l0s_l1(hw);
2476         if (netif_running(netdev)) {
2477                 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags));
2478                 atl1c_down(adapter);
2479         }
2480         netif_device_detach(netdev);
2481
2482         if (wufc)
2483                 if (atl1c_phy_power_saving(hw) != 0)
2484                         dev_dbg(&pdev->dev, "phy power saving failed");
2485
2486         AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
2487         AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data);
2488
2489         master_ctrl_data &= ~MASTER_CTRL_CLK_SEL_DIS;
2490         mac_ctrl_data &= ~(MAC_CTRL_PRMLEN_MASK << MAC_CTRL_PRMLEN_SHIFT);
2491         mac_ctrl_data |= (((u32)adapter->hw.preamble_len &
2492                         MAC_CTRL_PRMLEN_MASK) <<
2493                         MAC_CTRL_PRMLEN_SHIFT);
2494         mac_ctrl_data &= ~(MAC_CTRL_SPEED_MASK << MAC_CTRL_SPEED_SHIFT);
2495         mac_ctrl_data &= ~MAC_CTRL_DUPLX;
2496
2497         if (wufc) {
2498                 mac_ctrl_data |= MAC_CTRL_RX_EN;
2499                 if (adapter->link_speed == SPEED_1000 ||
2500                         adapter->link_speed == SPEED_0) {
2501                         mac_ctrl_data |= atl1c_mac_speed_1000 <<
2502                                         MAC_CTRL_SPEED_SHIFT;
2503                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2504                 } else
2505                         mac_ctrl_data |= atl1c_mac_speed_10_100 <<
2506                                         MAC_CTRL_SPEED_SHIFT;
2507
2508                 if (adapter->link_duplex == DUPLEX_FULL)
2509                         mac_ctrl_data |= MAC_CTRL_DUPLX;
2510
2511                 /* turn on magic packet wol */
2512                 if (wufc & AT_WUFC_MAG)
2513                         wol_ctrl_data |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
2514
2515                 if (wufc & AT_WUFC_LNKC) {
2516                         wol_ctrl_data |=  WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
2517                         /* only link up can wake up */
2518                         if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
2519                                 dev_dbg(&pdev->dev, "%s: read write phy "
2520                                                   "register failed.\n",
2521                                                   atl1c_driver_name);
2522                         }
2523                 }
2524                 /* clear phy interrupt */
2525                 atl1c_read_phy_reg(hw, MII_ISR, &mii_intr_status_data);
2526                 /* Config MAC Ctrl register */
2527                 __atl1c_vlan_mode(netdev->features, &mac_ctrl_data);
2528
2529                 /* magic packet maybe Broadcast&multicast&Unicast frame */
2530                 if (wufc & AT_WUFC_MAG)
2531                         mac_ctrl_data |= MAC_CTRL_BC_EN;
2532
2533                 dev_dbg(&pdev->dev,
2534                         "%s: suspend MAC=0x%x\n",
2535                         atl1c_driver_name, mac_ctrl_data);
2536                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2537                 AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl_data);
2538                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2539
2540                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
2541                         GPHY_CTRL_EXT_RESET);
2542         } else {
2543                 AT_WRITE_REG(hw, REG_GPHY_CTRL, GPHY_CTRL_POWER_SAVING);
2544                 master_ctrl_data |= MASTER_CTRL_CLK_SEL_DIS;
2545                 mac_ctrl_data |= atl1c_mac_speed_10_100 << MAC_CTRL_SPEED_SHIFT;
2546                 mac_ctrl_data |= MAC_CTRL_DUPLX;
2547                 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
2548                 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data);
2549                 AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
2550                 hw->phy_configured = false; /* re-init PHY when resume */
2551         }
2552
2553         return 0;
2554 }
2555
2556 #ifdef CONFIG_PM_SLEEP
2557 static int atl1c_resume(struct device *dev)
2558 {
2559         struct pci_dev *pdev = to_pci_dev(dev);
2560         struct net_device *netdev = pci_get_drvdata(pdev);
2561         struct atl1c_adapter *adapter = netdev_priv(netdev);
2562
2563         AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
2564         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2565                         ATL1C_PCIE_PHY_RESET);
2566
2567         atl1c_phy_reset(&adapter->hw);
2568         atl1c_reset_mac(&adapter->hw);
2569         atl1c_phy_init(&adapter->hw);
2570
2571 #if 0
2572         AT_READ_REG(&adapter->hw, REG_PM_CTRLSTAT, &pm_data);
2573         pm_data &= ~PM_CTRLSTAT_PME_EN;
2574         AT_WRITE_REG(&adapter->hw, REG_PM_CTRLSTAT, pm_data);
2575 #endif
2576
2577         netif_device_attach(netdev);
2578         if (netif_running(netdev))
2579                 atl1c_up(adapter);
2580
2581         return 0;
2582 }
2583 #endif
2584
2585 static void atl1c_shutdown(struct pci_dev *pdev)
2586 {
2587         struct net_device *netdev = pci_get_drvdata(pdev);
2588         struct atl1c_adapter *adapter = netdev_priv(netdev);
2589
2590         atl1c_suspend(&pdev->dev);
2591         pci_wake_from_d3(pdev, adapter->wol);
2592         pci_set_power_state(pdev, PCI_D3hot);
2593 }
2594
2595 static const struct net_device_ops atl1c_netdev_ops = {
2596         .ndo_open               = atl1c_open,
2597         .ndo_stop               = atl1c_close,
2598         .ndo_validate_addr      = eth_validate_addr,
2599         .ndo_start_xmit         = atl1c_xmit_frame,
2600         .ndo_set_mac_address    = atl1c_set_mac_addr,
2601         .ndo_set_rx_mode        = atl1c_set_multi,
2602         .ndo_change_mtu         = atl1c_change_mtu,
2603         .ndo_fix_features       = atl1c_fix_features,
2604         .ndo_set_features       = atl1c_set_features,
2605         .ndo_do_ioctl           = atl1c_ioctl,
2606         .ndo_tx_timeout         = atl1c_tx_timeout,
2607         .ndo_get_stats          = atl1c_get_stats,
2608 #ifdef CONFIG_NET_POLL_CONTROLLER
2609         .ndo_poll_controller    = atl1c_netpoll,
2610 #endif
2611 };
2612
2613 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
2614 {
2615         SET_NETDEV_DEV(netdev, &pdev->dev);
2616         pci_set_drvdata(pdev, netdev);
2617
2618         netdev->irq  = pdev->irq;
2619         netdev->netdev_ops = &atl1c_netdev_ops;
2620         netdev->watchdog_timeo = AT_TX_WATCHDOG;
2621         atl1c_set_ethtool_ops(netdev);
2622
2623         /* TODO: add when ready */
2624         netdev->hw_features =   NETIF_F_SG         |
2625                                 NETIF_F_HW_CSUM    |
2626                                 NETIF_F_HW_VLAN_RX |
2627                                 NETIF_F_TSO        |
2628                                 NETIF_F_TSO6;
2629         netdev->features =      netdev->hw_features |
2630                                 NETIF_F_HW_VLAN_TX;
2631         return 0;
2632 }
2633
2634 /*
2635  * atl1c_probe - Device Initialization Routine
2636  * @pdev: PCI device information struct
2637  * @ent: entry in atl1c_pci_tbl
2638  *
2639  * Returns 0 on success, negative on failure
2640  *
2641  * atl1c_probe initializes an adapter identified by a pci_dev structure.
2642  * The OS initialization, configuring of the adapter private structure,
2643  * and a hardware reset occur.
2644  */
2645 static int __devinit atl1c_probe(struct pci_dev *pdev,
2646                                  const struct pci_device_id *ent)
2647 {
2648         struct net_device *netdev;
2649         struct atl1c_adapter *adapter;
2650         static int cards_found;
2651
2652         int err = 0;
2653
2654         /* enable device (incl. PCI PM wakeup and hotplug setup) */
2655         err = pci_enable_device_mem(pdev);
2656         if (err) {
2657                 dev_err(&pdev->dev, "cannot enable PCI device\n");
2658                 return err;
2659         }
2660
2661         /*
2662          * The atl1c chip can DMA to 64-bit addresses, but it uses a single
2663          * shared register for the high 32 bits, so only a single, aligned,
2664          * 4 GB physical address range can be used at a time.
2665          *
2666          * Supporting 64-bit DMA on this hardware is more trouble than it's
2667          * worth.  It is far easier to limit to 32-bit DMA than update
2668          * various kernel subsystems to support the mechanics required by a
2669          * fixed-high-32-bit system.
2670          */
2671         if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) ||
2672             (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)) {
2673                 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n");
2674                 goto err_dma;
2675         }
2676
2677         err = pci_request_regions(pdev, atl1c_driver_name);
2678         if (err) {
2679                 dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2680                 goto err_pci_reg;
2681         }
2682
2683         pci_set_master(pdev);
2684
2685         netdev = alloc_etherdev(sizeof(struct atl1c_adapter));
2686         if (netdev == NULL) {
2687                 err = -ENOMEM;
2688                 dev_err(&pdev->dev, "etherdev alloc failed\n");
2689                 goto err_alloc_etherdev;
2690         }
2691
2692         err = atl1c_init_netdev(netdev, pdev);
2693         if (err) {
2694                 dev_err(&pdev->dev, "init netdevice failed\n");
2695                 goto err_init_netdev;
2696         }
2697         adapter = netdev_priv(netdev);
2698         adapter->bd_number = cards_found;
2699         adapter->netdev = netdev;
2700         adapter->pdev = pdev;
2701         adapter->hw.adapter = adapter;
2702         adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg);
2703         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
2704         if (!adapter->hw.hw_addr) {
2705                 err = -EIO;
2706                 dev_err(&pdev->dev, "cannot map device registers\n");
2707                 goto err_ioremap;
2708         }
2709         netdev->base_addr = (unsigned long)adapter->hw.hw_addr;
2710
2711         /* init mii data */
2712         adapter->mii.dev = netdev;
2713         adapter->mii.mdio_read  = atl1c_mdio_read;
2714         adapter->mii.mdio_write = atl1c_mdio_write;
2715         adapter->mii.phy_id_mask = 0x1f;
2716         adapter->mii.reg_num_mask = MDIO_REG_ADDR_MASK;
2717         netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64);
2718         setup_timer(&adapter->phy_config_timer, atl1c_phy_config,
2719                         (unsigned long)adapter);
2720         /* setup the private structure */
2721         err = atl1c_sw_init(adapter);
2722         if (err) {
2723                 dev_err(&pdev->dev, "net device private data init failed\n");
2724                 goto err_sw_init;
2725         }
2726         atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE |
2727                         ATL1C_PCIE_PHY_RESET);
2728
2729         /* Init GPHY as early as possible due to power saving issue  */
2730         atl1c_phy_reset(&adapter->hw);
2731
2732         err = atl1c_reset_mac(&adapter->hw);
2733         if (err) {
2734                 err = -EIO;
2735                 goto err_reset;
2736         }
2737
2738         /* reset the controller to
2739          * put the device in a known good starting state */
2740         err = atl1c_phy_init(&adapter->hw);
2741         if (err) {
2742                 err = -EIO;
2743                 goto err_reset;
2744         }
2745         if (atl1c_read_mac_addr(&adapter->hw) != 0) {
2746                 err = -EIO;
2747                 dev_err(&pdev->dev, "get mac address failed\n");
2748                 goto err_eeprom;
2749         }
2750         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
2751         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
2752         if (netif_msg_probe(adapter))
2753                 dev_dbg(&pdev->dev, "mac address : %pM\n",
2754                         adapter->hw.mac_addr);
2755
2756         atl1c_hw_set_mac_addr(&adapter->hw);
2757         INIT_WORK(&adapter->common_task, atl1c_common_task);
2758         adapter->work_event = 0;
2759         err = register_netdev(netdev);
2760         if (err) {
2761                 dev_err(&pdev->dev, "register netdevice failed\n");
2762                 goto err_register;
2763         }
2764
2765         if (netif_msg_probe(adapter))
2766                 dev_info(&pdev->dev, "version %s\n", ATL1C_DRV_VERSION);
2767         cards_found++;
2768         return 0;
2769
2770 err_reset:
2771 err_register:
2772 err_sw_init:
2773 err_eeprom:
2774         iounmap(adapter->hw.hw_addr);
2775 err_init_netdev:
2776 err_ioremap:
2777         free_netdev(netdev);
2778 err_alloc_etherdev:
2779         pci_release_regions(pdev);
2780 err_pci_reg:
2781 err_dma:
2782         pci_disable_device(pdev);
2783         return err;
2784 }
2785
2786 /*
2787  * atl1c_remove - Device Removal Routine
2788  * @pdev: PCI device information struct
2789  *
2790  * atl1c_remove is called by the PCI subsystem to alert the driver
2791  * that it should release a PCI device.  The could be caused by a
2792  * Hot-Plug event, or because the driver is going to be removed from
2793  * memory.
2794  */
2795 static void __devexit atl1c_remove(struct pci_dev *pdev)
2796 {
2797         struct net_device *netdev = pci_get_drvdata(pdev);
2798         struct atl1c_adapter *adapter = netdev_priv(netdev);
2799
2800         unregister_netdev(netdev);
2801         atl1c_phy_disable(&adapter->hw);
2802
2803         iounmap(adapter->hw.hw_addr);
2804
2805         pci_release_regions(pdev);
2806         pci_disable_device(pdev);
2807         free_netdev(netdev);
2808 }
2809
2810 /*
2811  * atl1c_io_error_detected - called when PCI error is detected
2812  * @pdev: Pointer to PCI device
2813  * @state: The current pci connection state
2814  *
2815  * This function is called after a PCI bus error affecting
2816  * this device has been detected.
2817  */
2818 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev,
2819                                                 pci_channel_state_t state)
2820 {
2821         struct net_device *netdev = pci_get_drvdata(pdev);
2822         struct atl1c_adapter *adapter = netdev_priv(netdev);
2823
2824         netif_device_detach(netdev);
2825
2826         if (state == pci_channel_io_perm_failure)
2827                 return PCI_ERS_RESULT_DISCONNECT;
2828
2829         if (netif_running(netdev))
2830                 atl1c_down(adapter);
2831
2832         pci_disable_device(pdev);
2833
2834         /* Request a slot slot reset. */
2835         return PCI_ERS_RESULT_NEED_RESET;
2836 }
2837
2838 /*
2839  * atl1c_io_slot_reset - called after the pci bus has been reset.
2840  * @pdev: Pointer to PCI device
2841  *
2842  * Restart the card from scratch, as if from a cold-boot. Implementation
2843  * resembles the first-half of the e1000_resume routine.
2844  */
2845 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev)
2846 {
2847         struct net_device *netdev = pci_get_drvdata(pdev);
2848         struct atl1c_adapter *adapter = netdev_priv(netdev);
2849
2850         if (pci_enable_device(pdev)) {
2851                 if (netif_msg_hw(adapter))
2852                         dev_err(&pdev->dev,
2853                                 "Cannot re-enable PCI device after reset\n");
2854                 return PCI_ERS_RESULT_DISCONNECT;
2855         }
2856         pci_set_master(pdev);
2857
2858         pci_enable_wake(pdev, PCI_D3hot, 0);
2859         pci_enable_wake(pdev, PCI_D3cold, 0);
2860
2861         atl1c_reset_mac(&adapter->hw);
2862
2863         return PCI_ERS_RESULT_RECOVERED;
2864 }
2865
2866 /*
2867  * atl1c_io_resume - called when traffic can start flowing again.
2868  * @pdev: Pointer to PCI device
2869  *
2870  * This callback is called when the error recovery driver tells us that
2871  * its OK to resume normal operation. Implementation resembles the
2872  * second-half of the atl1c_resume routine.
2873  */
2874 static void atl1c_io_resume(struct pci_dev *pdev)
2875 {
2876         struct net_device *netdev = pci_get_drvdata(pdev);
2877         struct atl1c_adapter *adapter = netdev_priv(netdev);
2878
2879         if (netif_running(netdev)) {
2880                 if (atl1c_up(adapter)) {
2881                         if (netif_msg_hw(adapter))
2882                                 dev_err(&pdev->dev,
2883                                         "Cannot bring device back up after reset\n");
2884                         return;
2885                 }
2886         }
2887
2888         netif_device_attach(netdev);
2889 }
2890
2891 static struct pci_error_handlers atl1c_err_handler = {
2892         .error_detected = atl1c_io_error_detected,
2893         .slot_reset = atl1c_io_slot_reset,
2894         .resume = atl1c_io_resume,
2895 };
2896
2897 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume);
2898
2899 static struct pci_driver atl1c_driver = {
2900         .name     = atl1c_driver_name,
2901         .id_table = atl1c_pci_tbl,
2902         .probe    = atl1c_probe,
2903         .remove   = __devexit_p(atl1c_remove),
2904         .shutdown = atl1c_shutdown,
2905         .err_handler = &atl1c_err_handler,
2906         .driver.pm = &atl1c_pm_ops,
2907 };
2908
2909 /*
2910  * atl1c_init_module - Driver Registration Routine
2911  *
2912  * atl1c_init_module is the first routine called when the driver is
2913  * loaded. All it does is register with the PCI subsystem.
2914  */
2915 static int __init atl1c_init_module(void)
2916 {
2917         return pci_register_driver(&atl1c_driver);
2918 }
2919
2920 /*
2921  * atl1c_exit_module - Driver Exit Cleanup Routine
2922  *
2923  * atl1c_exit_module is called just before the driver is removed
2924  * from memory.
2925  */
2926 static void __exit atl1c_exit_module(void)
2927 {
2928         pci_unregister_driver(&atl1c_driver);
2929 }
2930
2931 module_init(atl1c_init_module);
2932 module_exit(atl1c_exit_module);