1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright(c) 2008 - 2009 Atheros Corporation. All rights reserved. 4 * 5 * Derived from Intel e1000 driver 6 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved. 7 */ 8 9 #include "atl1c.h" 10 11 char atl1c_driver_name[] = "atl1c"; 12 13 /* 14 * atl1c_pci_tbl - PCI Device ID Table 15 * 16 * Wildcard entries (PCI_ANY_ID) should come last 17 * Last entry must be all 0s 18 * 19 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, 20 * Class, Class Mask, private data (not used) } 21 */ 22 static const struct pci_device_id atl1c_pci_tbl[] = { 23 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1C)}, 24 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2C)}, 25 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B)}, 26 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L2C_B2)}, 27 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D)}, 28 {PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATHEROS_L1D_2_0)}, 29 /* required last entry */ 30 { 0 } 31 }; 32 MODULE_DEVICE_TABLE(pci, atl1c_pci_tbl); 33 34 MODULE_AUTHOR("Jie Yang"); 35 MODULE_AUTHOR("Qualcomm Atheros Inc."); 36 MODULE_DESCRIPTION("Qualcomm Atheros 100/1000M Ethernet Network Driver"); 37 MODULE_LICENSE("GPL"); 38 39 static int atl1c_stop_mac(struct atl1c_hw *hw); 40 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw); 41 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed); 42 static void atl1c_start_mac(struct atl1c_adapter *adapter); 43 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 44 int *work_done, int work_to_do); 45 static int atl1c_up(struct atl1c_adapter *adapter); 46 static void atl1c_down(struct atl1c_adapter *adapter); 47 static int atl1c_reset_mac(struct atl1c_hw *hw); 48 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter); 49 static int atl1c_configure(struct atl1c_adapter *adapter); 50 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, bool napi_mode); 51 52 53 static const u32 atl1c_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | 54 NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP; 55 static void atl1c_pcie_patch(struct atl1c_hw *hw) 56 { 57 u32 mst_data, data; 58 59 /* pclk sel could switch to 25M */ 60 AT_READ_REG(hw, REG_MASTER_CTRL, &mst_data); 61 mst_data &= ~MASTER_CTRL_CLK_SEL_DIS; 62 AT_WRITE_REG(hw, REG_MASTER_CTRL, mst_data); 63 64 /* WoL/PCIE related settings */ 65 if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) { 66 AT_READ_REG(hw, REG_PCIE_PHYMISC, &data); 67 data |= PCIE_PHYMISC_FORCE_RCV_DET; 68 AT_WRITE_REG(hw, REG_PCIE_PHYMISC, data); 69 } else { /* new dev set bit5 of MASTER */ 70 if (!(mst_data & MASTER_CTRL_WAKEN_25M)) 71 AT_WRITE_REG(hw, REG_MASTER_CTRL, 72 mst_data | MASTER_CTRL_WAKEN_25M); 73 } 74 /* aspm/PCIE setting only for l2cb 1.0 */ 75 if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V10) { 76 AT_READ_REG(hw, REG_PCIE_PHYMISC2, &data); 77 data = FIELD_SETX(data, PCIE_PHYMISC2_CDR_BW, 78 L2CB1_PCIE_PHYMISC2_CDR_BW); 79 data = FIELD_SETX(data, PCIE_PHYMISC2_L0S_TH, 80 L2CB1_PCIE_PHYMISC2_L0S_TH); 81 AT_WRITE_REG(hw, REG_PCIE_PHYMISC2, data); 82 /* extend L1 sync timer */ 83 AT_READ_REG(hw, REG_LINK_CTRL, &data); 84 data |= LINK_CTRL_EXT_SYNC; 85 AT_WRITE_REG(hw, REG_LINK_CTRL, data); 86 } 87 /* l2cb 1.x & l1d 1.x */ 88 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d) { 89 AT_READ_REG(hw, REG_PM_CTRL, &data); 90 data |= PM_CTRL_L0S_BUFSRX_EN; 91 AT_WRITE_REG(hw, REG_PM_CTRL, data); 92 /* clear vendor msg */ 93 AT_READ_REG(hw, REG_DMA_DBG, &data); 94 AT_WRITE_REG(hw, REG_DMA_DBG, data & ~DMA_DBG_VENDOR_MSG); 95 } 96 } 97 98 /* FIXME: no need any more ? */ 99 /* 100 * atl1c_init_pcie - init PCIE module 101 */ 102 static void atl1c_reset_pcie(struct atl1c_hw *hw, u32 flag) 103 { 104 u32 data; 105 u32 pci_cmd; 106 struct pci_dev *pdev = hw->adapter->pdev; 107 int pos; 108 109 AT_READ_REG(hw, PCI_COMMAND, &pci_cmd); 110 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; 111 pci_cmd |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 112 PCI_COMMAND_IO); 113 AT_WRITE_REG(hw, PCI_COMMAND, pci_cmd); 114 115 /* 116 * Clear any PowerSaveing Settings 117 */ 118 pci_enable_wake(pdev, PCI_D3hot, 0); 119 pci_enable_wake(pdev, PCI_D3cold, 0); 120 /* wol sts read-clear */ 121 AT_READ_REG(hw, REG_WOL_CTRL, &data); 122 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 123 124 /* 125 * Mask some pcie error bits 126 */ 127 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR); 128 if (pos) { 129 pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &data); 130 data &= ~(PCI_ERR_UNC_DLP | PCI_ERR_UNC_FCP); 131 pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, data); 132 } 133 /* clear error status */ 134 pcie_capability_write_word(pdev, PCI_EXP_DEVSTA, 135 PCI_EXP_DEVSTA_NFED | 136 PCI_EXP_DEVSTA_FED | 137 PCI_EXP_DEVSTA_CED | 138 PCI_EXP_DEVSTA_URD); 139 140 AT_READ_REG(hw, REG_LTSSM_ID_CTRL, &data); 141 data &= ~LTSSM_ID_EN_WRO; 142 AT_WRITE_REG(hw, REG_LTSSM_ID_CTRL, data); 143 144 atl1c_pcie_patch(hw); 145 if (flag & ATL1C_PCIE_L0S_L1_DISABLE) 146 atl1c_disable_l0s_l1(hw); 147 148 msleep(5); 149 } 150 151 /** 152 * atl1c_irq_enable - Enable default interrupt generation settings 153 * @adapter: board private structure 154 */ 155 static inline void atl1c_irq_enable(struct atl1c_adapter *adapter) 156 { 157 if (likely(atomic_dec_and_test(&adapter->irq_sem))) { 158 AT_WRITE_REG(&adapter->hw, REG_ISR, 0x7FFFFFFF); 159 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 160 AT_WRITE_FLUSH(&adapter->hw); 161 } 162 } 163 164 /** 165 * atl1c_irq_disable - Mask off interrupt generation on the NIC 166 * @adapter: board private structure 167 */ 168 static inline void atl1c_irq_disable(struct atl1c_adapter *adapter) 169 { 170 atomic_inc(&adapter->irq_sem); 171 AT_WRITE_REG(&adapter->hw, REG_IMR, 0); 172 AT_WRITE_REG(&adapter->hw, REG_ISR, ISR_DIS_INT); 173 AT_WRITE_FLUSH(&adapter->hw); 174 synchronize_irq(adapter->pdev->irq); 175 } 176 177 /** 178 * atl1c_irq_reset - reset interrupt confiure on the NIC 179 * @adapter: board private structure 180 */ 181 static inline void atl1c_irq_reset(struct atl1c_adapter *adapter) 182 { 183 atomic_set(&adapter->irq_sem, 1); 184 atl1c_irq_enable(adapter); 185 } 186 187 /* 188 * atl1c_wait_until_idle - wait up to AT_HW_MAX_IDLE_DELAY reads 189 * of the idle status register until the device is actually idle 190 */ 191 static u32 atl1c_wait_until_idle(struct atl1c_hw *hw, u32 modu_ctrl) 192 { 193 int timeout; 194 u32 data; 195 196 for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) { 197 AT_READ_REG(hw, REG_IDLE_STATUS, &data); 198 if ((data & modu_ctrl) == 0) 199 return 0; 200 msleep(1); 201 } 202 return data; 203 } 204 205 /** 206 * atl1c_phy_config - Timer Call-back 207 * @t: timer list containing pointer to netdev cast into an unsigned long 208 */ 209 static void atl1c_phy_config(struct timer_list *t) 210 { 211 struct atl1c_adapter *adapter = from_timer(adapter, t, 212 phy_config_timer); 213 struct atl1c_hw *hw = &adapter->hw; 214 unsigned long flags; 215 216 spin_lock_irqsave(&adapter->mdio_lock, flags); 217 atl1c_restart_autoneg(hw); 218 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 219 } 220 221 void atl1c_reinit_locked(struct atl1c_adapter *adapter) 222 { 223 atl1c_down(adapter); 224 atl1c_up(adapter); 225 clear_bit(__AT_RESETTING, &adapter->flags); 226 } 227 228 static void atl1c_check_link_status(struct atl1c_adapter *adapter) 229 { 230 struct atl1c_hw *hw = &adapter->hw; 231 struct net_device *netdev = adapter->netdev; 232 struct pci_dev *pdev = adapter->pdev; 233 int err; 234 unsigned long flags; 235 u16 speed, duplex; 236 bool link; 237 238 spin_lock_irqsave(&adapter->mdio_lock, flags); 239 link = atl1c_get_link_status(hw); 240 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 241 242 if (!link) { 243 /* link down */ 244 netif_carrier_off(netdev); 245 hw->hibernate = true; 246 if (atl1c_reset_mac(hw) != 0) 247 if (netif_msg_hw(adapter)) 248 dev_warn(&pdev->dev, "reset mac failed\n"); 249 atl1c_set_aspm(hw, SPEED_0); 250 atl1c_post_phy_linkchg(hw, SPEED_0); 251 atl1c_reset_dma_ring(adapter); 252 atl1c_configure(adapter); 253 } else { 254 /* Link Up */ 255 hw->hibernate = false; 256 spin_lock_irqsave(&adapter->mdio_lock, flags); 257 err = atl1c_get_speed_and_duplex(hw, &speed, &duplex); 258 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 259 if (unlikely(err)) 260 return; 261 /* link result is our setting */ 262 if (adapter->link_speed != speed || 263 adapter->link_duplex != duplex) { 264 adapter->link_speed = speed; 265 adapter->link_duplex = duplex; 266 atl1c_set_aspm(hw, speed); 267 atl1c_post_phy_linkchg(hw, speed); 268 atl1c_start_mac(adapter); 269 if (netif_msg_link(adapter)) 270 dev_info(&pdev->dev, 271 "%s: %s NIC Link is Up<%d Mbps %s>\n", 272 atl1c_driver_name, netdev->name, 273 adapter->link_speed, 274 adapter->link_duplex == FULL_DUPLEX ? 275 "Full Duplex" : "Half Duplex"); 276 } 277 if (!netif_carrier_ok(netdev)) 278 netif_carrier_on(netdev); 279 } 280 } 281 282 static void atl1c_link_chg_event(struct atl1c_adapter *adapter) 283 { 284 struct net_device *netdev = adapter->netdev; 285 struct pci_dev *pdev = adapter->pdev; 286 bool link; 287 288 spin_lock(&adapter->mdio_lock); 289 link = atl1c_get_link_status(&adapter->hw); 290 spin_unlock(&adapter->mdio_lock); 291 /* notify upper layer link down ASAP */ 292 if (!link) { 293 if (netif_carrier_ok(netdev)) { 294 /* old link state: Up */ 295 netif_carrier_off(netdev); 296 if (netif_msg_link(adapter)) 297 dev_info(&pdev->dev, 298 "%s: %s NIC Link is Down\n", 299 atl1c_driver_name, netdev->name); 300 adapter->link_speed = SPEED_0; 301 } 302 } 303 304 set_bit(ATL1C_WORK_EVENT_LINK_CHANGE, &adapter->work_event); 305 schedule_work(&adapter->common_task); 306 } 307 308 static void atl1c_common_task(struct work_struct *work) 309 { 310 struct atl1c_adapter *adapter; 311 struct net_device *netdev; 312 313 adapter = container_of(work, struct atl1c_adapter, common_task); 314 netdev = adapter->netdev; 315 316 if (test_bit(__AT_DOWN, &adapter->flags)) 317 return; 318 319 if (test_and_clear_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event)) { 320 netif_device_detach(netdev); 321 atl1c_down(adapter); 322 atl1c_up(adapter); 323 netif_device_attach(netdev); 324 } 325 326 if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE, 327 &adapter->work_event)) { 328 atl1c_irq_disable(adapter); 329 atl1c_check_link_status(adapter); 330 atl1c_irq_enable(adapter); 331 } 332 } 333 334 335 static void atl1c_del_timer(struct atl1c_adapter *adapter) 336 { 337 del_timer_sync(&adapter->phy_config_timer); 338 } 339 340 341 /** 342 * atl1c_tx_timeout - Respond to a Tx Hang 343 * @netdev: network interface device structure 344 * @txqueue: index of hanging tx queue 345 */ 346 static void atl1c_tx_timeout(struct net_device *netdev, unsigned int txqueue) 347 { 348 struct atl1c_adapter *adapter = netdev_priv(netdev); 349 350 /* Do the reset outside of interrupt context */ 351 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 352 schedule_work(&adapter->common_task); 353 } 354 355 /** 356 * atl1c_set_multi - Multicast and Promiscuous mode set 357 * @netdev: network interface device structure 358 * 359 * The set_multi entry point is called whenever the multicast address 360 * list or the network interface flags are updated. This routine is 361 * responsible for configuring the hardware for proper multicast, 362 * promiscuous mode, and all-multi behavior. 363 */ 364 static void atl1c_set_multi(struct net_device *netdev) 365 { 366 struct atl1c_adapter *adapter = netdev_priv(netdev); 367 struct atl1c_hw *hw = &adapter->hw; 368 struct netdev_hw_addr *ha; 369 u32 mac_ctrl_data; 370 u32 hash_value; 371 372 /* Check for Promiscuous and All Multicast modes */ 373 AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl_data); 374 375 if (netdev->flags & IFF_PROMISC) { 376 mac_ctrl_data |= MAC_CTRL_PROMIS_EN; 377 } else if (netdev->flags & IFF_ALLMULTI) { 378 mac_ctrl_data |= MAC_CTRL_MC_ALL_EN; 379 mac_ctrl_data &= ~MAC_CTRL_PROMIS_EN; 380 } else { 381 mac_ctrl_data &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN); 382 } 383 384 AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl_data); 385 386 /* clear the old settings from the multicast hash table */ 387 AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0); 388 AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0); 389 390 /* comoute mc addresses' hash value ,and put it into hash table */ 391 netdev_for_each_mc_addr(ha, netdev) { 392 hash_value = atl1c_hash_mc_addr(hw, ha->addr); 393 atl1c_hash_set(hw, hash_value); 394 } 395 } 396 397 static void __atl1c_vlan_mode(netdev_features_t features, u32 *mac_ctrl_data) 398 { 399 if (features & NETIF_F_HW_VLAN_CTAG_RX) { 400 /* enable VLAN tag insert/strip */ 401 *mac_ctrl_data |= MAC_CTRL_RMV_VLAN; 402 } else { 403 /* disable VLAN tag insert/strip */ 404 *mac_ctrl_data &= ~MAC_CTRL_RMV_VLAN; 405 } 406 } 407 408 static void atl1c_vlan_mode(struct net_device *netdev, 409 netdev_features_t features) 410 { 411 struct atl1c_adapter *adapter = netdev_priv(netdev); 412 struct pci_dev *pdev = adapter->pdev; 413 u32 mac_ctrl_data = 0; 414 415 if (netif_msg_pktdata(adapter)) 416 dev_dbg(&pdev->dev, "atl1c_vlan_mode\n"); 417 418 atl1c_irq_disable(adapter); 419 AT_READ_REG(&adapter->hw, REG_MAC_CTRL, &mac_ctrl_data); 420 __atl1c_vlan_mode(features, &mac_ctrl_data); 421 AT_WRITE_REG(&adapter->hw, REG_MAC_CTRL, mac_ctrl_data); 422 atl1c_irq_enable(adapter); 423 } 424 425 static void atl1c_restore_vlan(struct atl1c_adapter *adapter) 426 { 427 struct pci_dev *pdev = adapter->pdev; 428 429 if (netif_msg_pktdata(adapter)) 430 dev_dbg(&pdev->dev, "atl1c_restore_vlan\n"); 431 atl1c_vlan_mode(adapter->netdev, adapter->netdev->features); 432 } 433 434 /** 435 * atl1c_set_mac_addr - Change the Ethernet Address of the NIC 436 * @netdev: network interface device structure 437 * @p: pointer to an address structure 438 * 439 * Returns 0 on success, negative on failure 440 */ 441 static int atl1c_set_mac_addr(struct net_device *netdev, void *p) 442 { 443 struct atl1c_adapter *adapter = netdev_priv(netdev); 444 struct sockaddr *addr = p; 445 446 if (!is_valid_ether_addr(addr->sa_data)) 447 return -EADDRNOTAVAIL; 448 449 if (netif_running(netdev)) 450 return -EBUSY; 451 452 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 453 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len); 454 455 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 456 457 return 0; 458 } 459 460 static void atl1c_set_rxbufsize(struct atl1c_adapter *adapter, 461 struct net_device *dev) 462 { 463 unsigned int head_size; 464 int mtu = dev->mtu; 465 466 adapter->rx_buffer_len = mtu > AT_RX_BUF_SIZE ? 467 roundup(mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN, 8) : AT_RX_BUF_SIZE; 468 469 head_size = SKB_DATA_ALIGN(adapter->rx_buffer_len + NET_SKB_PAD + NET_IP_ALIGN) + 470 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 471 adapter->rx_frag_size = roundup_pow_of_two(head_size); 472 } 473 474 static netdev_features_t atl1c_fix_features(struct net_device *netdev, 475 netdev_features_t features) 476 { 477 struct atl1c_adapter *adapter = netdev_priv(netdev); 478 struct atl1c_hw *hw = &adapter->hw; 479 480 /* 481 * Since there is no support for separate rx/tx vlan accel 482 * enable/disable make sure tx flag is always in same state as rx. 483 */ 484 if (features & NETIF_F_HW_VLAN_CTAG_RX) 485 features |= NETIF_F_HW_VLAN_CTAG_TX; 486 else 487 features &= ~NETIF_F_HW_VLAN_CTAG_TX; 488 489 if (hw->nic_type != athr_mt) { 490 if (netdev->mtu > MAX_TSO_FRAME_SIZE) 491 features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 492 } 493 494 return features; 495 } 496 497 static int atl1c_set_features(struct net_device *netdev, 498 netdev_features_t features) 499 { 500 netdev_features_t changed = netdev->features ^ features; 501 502 if (changed & NETIF_F_HW_VLAN_CTAG_RX) 503 atl1c_vlan_mode(netdev, features); 504 505 return 0; 506 } 507 508 static void atl1c_set_max_mtu(struct net_device *netdev) 509 { 510 struct atl1c_adapter *adapter = netdev_priv(netdev); 511 struct atl1c_hw *hw = &adapter->hw; 512 513 switch (hw->nic_type) { 514 /* These (GbE) devices support jumbo packets, max_mtu 6122 */ 515 case athr_l1c: 516 case athr_l1d: 517 case athr_l1d_2: 518 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - 519 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); 520 break; 521 case athr_mt: 522 netdev->max_mtu = 9500; 523 break; 524 /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */ 525 default: 526 netdev->max_mtu = ETH_DATA_LEN; 527 break; 528 } 529 } 530 531 /** 532 * atl1c_change_mtu - Change the Maximum Transfer Unit 533 * @netdev: network interface device structure 534 * @new_mtu: new value for maximum frame size 535 * 536 * Returns 0 on success, negative on failure 537 */ 538 static int atl1c_change_mtu(struct net_device *netdev, int new_mtu) 539 { 540 struct atl1c_adapter *adapter = netdev_priv(netdev); 541 542 /* set MTU */ 543 if (netif_running(netdev)) { 544 while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) 545 msleep(1); 546 netdev->mtu = new_mtu; 547 adapter->hw.max_frame_size = new_mtu; 548 atl1c_set_rxbufsize(adapter, netdev); 549 atl1c_down(adapter); 550 netdev_update_features(netdev); 551 atl1c_up(adapter); 552 clear_bit(__AT_RESETTING, &adapter->flags); 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, &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, val); 575 } 576 577 static int atl1c_mii_ioctl(struct net_device *netdev, 578 struct ifreq *ifr, int cmd) 579 { 580 struct atl1c_adapter *adapter = netdev_priv(netdev); 581 struct pci_dev *pdev = adapter->pdev; 582 struct mii_ioctl_data *data = if_mii(ifr); 583 unsigned long flags; 584 int retval = 0; 585 586 if (!netif_running(netdev)) 587 return -EINVAL; 588 589 spin_lock_irqsave(&adapter->mdio_lock, flags); 590 switch (cmd) { 591 case SIOCGMIIPHY: 592 data->phy_id = 0; 593 break; 594 595 case SIOCGMIIREG: 596 if (atl1c_read_phy_reg(&adapter->hw, data->reg_num & 0x1F, 597 &data->val_out)) { 598 retval = -EIO; 599 goto out; 600 } 601 break; 602 603 case SIOCSMIIREG: 604 if (data->reg_num & ~(0x1F)) { 605 retval = -EFAULT; 606 goto out; 607 } 608 609 dev_dbg(&pdev->dev, "<atl1c_mii_ioctl> write %x %x", 610 data->reg_num, data->val_in); 611 if (atl1c_write_phy_reg(&adapter->hw, 612 data->reg_num, data->val_in)) { 613 retval = -EIO; 614 goto out; 615 } 616 break; 617 618 default: 619 retval = -EOPNOTSUPP; 620 break; 621 } 622 out: 623 spin_unlock_irqrestore(&adapter->mdio_lock, flags); 624 return retval; 625 } 626 627 static int atl1c_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 628 { 629 switch (cmd) { 630 case SIOCGMIIPHY: 631 case SIOCGMIIREG: 632 case SIOCSMIIREG: 633 return atl1c_mii_ioctl(netdev, ifr, cmd); 634 default: 635 return -EOPNOTSUPP; 636 } 637 } 638 639 /** 640 * atl1c_alloc_queues - Allocate memory for all rings 641 * @adapter: board private structure to initialize 642 * 643 */ 644 static int atl1c_alloc_queues(struct atl1c_adapter *adapter) 645 { 646 return 0; 647 } 648 649 static void atl1c_set_mac_type(struct atl1c_hw *hw) 650 { 651 u32 magic; 652 switch (hw->device_id) { 653 case PCI_DEVICE_ID_ATTANSIC_L2C: 654 hw->nic_type = athr_l2c; 655 break; 656 case PCI_DEVICE_ID_ATTANSIC_L1C: 657 hw->nic_type = athr_l1c; 658 break; 659 case PCI_DEVICE_ID_ATHEROS_L2C_B: 660 hw->nic_type = athr_l2c_b; 661 break; 662 case PCI_DEVICE_ID_ATHEROS_L2C_B2: 663 hw->nic_type = athr_l2c_b2; 664 break; 665 case PCI_DEVICE_ID_ATHEROS_L1D: 666 hw->nic_type = athr_l1d; 667 break; 668 case PCI_DEVICE_ID_ATHEROS_L1D_2_0: 669 hw->nic_type = athr_l1d_2; 670 AT_READ_REG(hw, REG_MT_MAGIC, &magic); 671 if (magic == MT_MAGIC) 672 hw->nic_type = athr_mt; 673 break; 674 default: 675 break; 676 } 677 } 678 679 static int atl1c_setup_mac_funcs(struct atl1c_hw *hw) 680 { 681 u32 link_ctrl_data; 682 683 atl1c_set_mac_type(hw); 684 AT_READ_REG(hw, REG_LINK_CTRL, &link_ctrl_data); 685 686 hw->ctrl_flags = ATL1C_INTR_MODRT_ENABLE | 687 ATL1C_TXQ_MODE_ENHANCE; 688 hw->ctrl_flags |= ATL1C_ASPM_L0S_SUPPORT | 689 ATL1C_ASPM_L1_SUPPORT; 690 hw->ctrl_flags |= ATL1C_ASPM_CTRL_MON; 691 692 if (hw->nic_type == athr_l1c || 693 hw->nic_type == athr_l1d || 694 hw->nic_type == athr_l1d_2) 695 hw->link_cap_flags |= ATL1C_LINK_CAP_1000M; 696 return 0; 697 } 698 699 struct atl1c_platform_patch { 700 u16 pci_did; 701 u8 pci_revid; 702 u16 subsystem_vid; 703 u16 subsystem_did; 704 u32 patch_flag; 705 #define ATL1C_LINK_PATCH 0x1 706 }; 707 static const struct atl1c_platform_patch plats[] = { 708 {0x2060, 0xC1, 0x1019, 0x8152, 0x1}, 709 {0x2060, 0xC1, 0x1019, 0x2060, 0x1}, 710 {0x2060, 0xC1, 0x1019, 0xE000, 0x1}, 711 {0x2062, 0xC0, 0x1019, 0x8152, 0x1}, 712 {0x2062, 0xC0, 0x1019, 0x2062, 0x1}, 713 {0x2062, 0xC0, 0x1458, 0xE000, 0x1}, 714 {0x2062, 0xC1, 0x1019, 0x8152, 0x1}, 715 {0x2062, 0xC1, 0x1019, 0x2062, 0x1}, 716 {0x2062, 0xC1, 0x1458, 0xE000, 0x1}, 717 {0x2062, 0xC1, 0x1565, 0x2802, 0x1}, 718 {0x2062, 0xC1, 0x1565, 0x2801, 0x1}, 719 {0x1073, 0xC0, 0x1019, 0x8151, 0x1}, 720 {0x1073, 0xC0, 0x1019, 0x1073, 0x1}, 721 {0x1073, 0xC0, 0x1458, 0xE000, 0x1}, 722 {0x1083, 0xC0, 0x1458, 0xE000, 0x1}, 723 {0x1083, 0xC0, 0x1019, 0x8151, 0x1}, 724 {0x1083, 0xC0, 0x1019, 0x1083, 0x1}, 725 {0x1083, 0xC0, 0x1462, 0x7680, 0x1}, 726 {0x1083, 0xC0, 0x1565, 0x2803, 0x1}, 727 {0}, 728 }; 729 730 static void atl1c_patch_assign(struct atl1c_hw *hw) 731 { 732 struct pci_dev *pdev = hw->adapter->pdev; 733 u32 misc_ctrl; 734 int i = 0; 735 736 hw->msi_lnkpatch = false; 737 738 while (plats[i].pci_did != 0) { 739 if (plats[i].pci_did == hw->device_id && 740 plats[i].pci_revid == hw->revision_id && 741 plats[i].subsystem_vid == hw->subsystem_vendor_id && 742 plats[i].subsystem_did == hw->subsystem_id) { 743 if (plats[i].patch_flag & ATL1C_LINK_PATCH) 744 hw->msi_lnkpatch = true; 745 } 746 i++; 747 } 748 749 if (hw->device_id == PCI_DEVICE_ID_ATHEROS_L2C_B2 && 750 hw->revision_id == L2CB_V21) { 751 /* config access mode */ 752 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 753 REG_PCIE_DEV_MISC_CTRL); 754 pci_read_config_dword(pdev, REG_PCIE_IND_ACC_DATA, &misc_ctrl); 755 misc_ctrl &= ~0x100; 756 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_ADDR, 757 REG_PCIE_DEV_MISC_CTRL); 758 pci_write_config_dword(pdev, REG_PCIE_IND_ACC_DATA, misc_ctrl); 759 } 760 } 761 /** 762 * atl1c_sw_init - Initialize general software structures (struct atl1c_adapter) 763 * @adapter: board private structure to initialize 764 * 765 * atl1c_sw_init initializes the Adapter private data structure. 766 * Fields are initialized based on PCI device information and 767 * OS network device settings (MTU size). 768 */ 769 static int atl1c_sw_init(struct atl1c_adapter *adapter) 770 { 771 struct atl1c_hw *hw = &adapter->hw; 772 struct pci_dev *pdev = adapter->pdev; 773 u32 revision; 774 775 776 adapter->wol = 0; 777 device_set_wakeup_enable(&pdev->dev, false); 778 adapter->link_speed = SPEED_0; 779 adapter->link_duplex = FULL_DUPLEX; 780 adapter->tpd_ring[0].count = 1024; 781 adapter->rfd_ring.count = 512; 782 783 hw->vendor_id = pdev->vendor; 784 hw->device_id = pdev->device; 785 hw->subsystem_vendor_id = pdev->subsystem_vendor; 786 hw->subsystem_id = pdev->subsystem_device; 787 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &revision); 788 hw->revision_id = revision & 0xFF; 789 /* before link up, we assume hibernate is true */ 790 hw->hibernate = true; 791 hw->media_type = MEDIA_TYPE_AUTO_SENSOR; 792 if (atl1c_setup_mac_funcs(hw) != 0) { 793 dev_err(&pdev->dev, "set mac function pointers failed\n"); 794 return -1; 795 } 796 atl1c_patch_assign(hw); 797 798 hw->intr_mask = IMR_NORMAL_MASK; 799 hw->phy_configured = false; 800 hw->preamble_len = 7; 801 hw->max_frame_size = adapter->netdev->mtu; 802 hw->autoneg_advertised = ADVERTISED_Autoneg; 803 hw->indirect_tab = 0xE4E4E4E4; 804 hw->base_cpu = 0; 805 806 hw->ict = 50000; /* 100ms */ 807 hw->smb_timer = 200000; /* 400ms */ 808 hw->rx_imt = 200; 809 hw->tx_imt = 1000; 810 811 hw->tpd_burst = 5; 812 hw->rfd_burst = 8; 813 hw->dma_order = atl1c_dma_ord_out; 814 hw->dmar_block = atl1c_dma_req_1024; 815 816 if (atl1c_alloc_queues(adapter)) { 817 dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); 818 return -ENOMEM; 819 } 820 /* TODO */ 821 atl1c_set_rxbufsize(adapter, adapter->netdev); 822 atomic_set(&adapter->irq_sem, 1); 823 spin_lock_init(&adapter->mdio_lock); 824 spin_lock_init(&adapter->hw.intr_mask_lock); 825 set_bit(__AT_DOWN, &adapter->flags); 826 827 return 0; 828 } 829 830 static inline void atl1c_clean_buffer(struct pci_dev *pdev, 831 struct atl1c_buffer *buffer_info) 832 { 833 u16 pci_driection; 834 if (buffer_info->flags & ATL1C_BUFFER_FREE) 835 return; 836 if (buffer_info->dma) { 837 if (buffer_info->flags & ATL1C_PCIMAP_FROMDEVICE) 838 pci_driection = DMA_FROM_DEVICE; 839 else 840 pci_driection = DMA_TO_DEVICE; 841 842 if (buffer_info->flags & ATL1C_PCIMAP_SINGLE) 843 dma_unmap_single(&pdev->dev, buffer_info->dma, 844 buffer_info->length, pci_driection); 845 else if (buffer_info->flags & ATL1C_PCIMAP_PAGE) 846 dma_unmap_page(&pdev->dev, buffer_info->dma, 847 buffer_info->length, pci_driection); 848 } 849 if (buffer_info->skb) 850 dev_consume_skb_any(buffer_info->skb); 851 buffer_info->dma = 0; 852 buffer_info->skb = NULL; 853 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 854 } 855 /** 856 * atl1c_clean_tx_ring - Free Tx-skb 857 * @adapter: board private structure 858 * @type: type of transmit queue 859 */ 860 static void atl1c_clean_tx_ring(struct atl1c_adapter *adapter, 861 enum atl1c_trans_queue type) 862 { 863 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 864 struct atl1c_buffer *buffer_info; 865 struct pci_dev *pdev = adapter->pdev; 866 u16 index, ring_count; 867 868 ring_count = tpd_ring->count; 869 for (index = 0; index < ring_count; index++) { 870 buffer_info = &tpd_ring->buffer_info[index]; 871 atl1c_clean_buffer(pdev, buffer_info); 872 } 873 874 netdev_reset_queue(adapter->netdev); 875 876 /* Zero out Tx-buffers */ 877 memset(tpd_ring->desc, 0, sizeof(struct atl1c_tpd_desc) * 878 ring_count); 879 atomic_set(&tpd_ring->next_to_clean, 0); 880 tpd_ring->next_to_use = 0; 881 } 882 883 /** 884 * atl1c_clean_rx_ring - Free rx-reservation skbs 885 * @adapter: board private structure 886 */ 887 static void atl1c_clean_rx_ring(struct atl1c_adapter *adapter) 888 { 889 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 890 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 891 struct atl1c_buffer *buffer_info; 892 struct pci_dev *pdev = adapter->pdev; 893 int j; 894 895 for (j = 0; j < rfd_ring->count; j++) { 896 buffer_info = &rfd_ring->buffer_info[j]; 897 atl1c_clean_buffer(pdev, buffer_info); 898 } 899 /* zero out the descriptor ring */ 900 memset(rfd_ring->desc, 0, rfd_ring->size); 901 rfd_ring->next_to_clean = 0; 902 rfd_ring->next_to_use = 0; 903 rrd_ring->next_to_use = 0; 904 rrd_ring->next_to_clean = 0; 905 } 906 907 /* 908 * Read / Write Ptr Initialize: 909 */ 910 static void atl1c_init_ring_ptrs(struct atl1c_adapter *adapter) 911 { 912 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 913 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 914 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 915 struct atl1c_buffer *buffer_info; 916 int i, j; 917 918 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 919 tpd_ring[i].next_to_use = 0; 920 atomic_set(&tpd_ring[i].next_to_clean, 0); 921 buffer_info = tpd_ring[i].buffer_info; 922 for (j = 0; j < tpd_ring->count; j++) 923 ATL1C_SET_BUFFER_STATE(&buffer_info[i], 924 ATL1C_BUFFER_FREE); 925 } 926 rfd_ring->next_to_use = 0; 927 rfd_ring->next_to_clean = 0; 928 rrd_ring->next_to_use = 0; 929 rrd_ring->next_to_clean = 0; 930 for (j = 0; j < rfd_ring->count; j++) { 931 buffer_info = &rfd_ring->buffer_info[j]; 932 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 933 } 934 } 935 936 /** 937 * atl1c_free_ring_resources - Free Tx / RX descriptor Resources 938 * @adapter: board private structure 939 * 940 * Free all transmit software resources 941 */ 942 static void atl1c_free_ring_resources(struct atl1c_adapter *adapter) 943 { 944 struct pci_dev *pdev = adapter->pdev; 945 946 dma_free_coherent(&pdev->dev, adapter->ring_header.size, 947 adapter->ring_header.desc, adapter->ring_header.dma); 948 adapter->ring_header.desc = NULL; 949 950 /* Note: just free tdp_ring.buffer_info, 951 * it contain rfd_ring.buffer_info, do not double free */ 952 if (adapter->tpd_ring[0].buffer_info) { 953 kfree(adapter->tpd_ring[0].buffer_info); 954 adapter->tpd_ring[0].buffer_info = NULL; 955 } 956 if (adapter->rx_page) { 957 put_page(adapter->rx_page); 958 adapter->rx_page = NULL; 959 } 960 } 961 962 /** 963 * atl1c_setup_ring_resources - allocate Tx / RX descriptor resources 964 * @adapter: board private structure 965 * 966 * Return 0 on success, negative on failure 967 */ 968 static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter) 969 { 970 struct pci_dev *pdev = adapter->pdev; 971 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 972 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 973 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 974 struct atl1c_ring_header *ring_header = &adapter->ring_header; 975 int size; 976 int i; 977 int count = 0; 978 int rx_desc_count = 0; 979 u32 offset = 0; 980 981 rrd_ring->count = rfd_ring->count; 982 for (i = 1; i < AT_MAX_TRANSMIT_QUEUE; i++) 983 tpd_ring[i].count = tpd_ring[0].count; 984 985 /* 2 tpd queue, one high priority queue, 986 * another normal priority queue */ 987 size = sizeof(struct atl1c_buffer) * (tpd_ring->count * 2 + 988 rfd_ring->count); 989 tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL); 990 if (unlikely(!tpd_ring->buffer_info)) 991 goto err_nomem; 992 993 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 994 tpd_ring[i].buffer_info = 995 (tpd_ring->buffer_info + count); 996 count += tpd_ring[i].count; 997 } 998 999 rfd_ring->buffer_info = 1000 (tpd_ring->buffer_info + count); 1001 count += rfd_ring->count; 1002 rx_desc_count += rfd_ring->count; 1003 1004 /* 1005 * real ring DMA buffer 1006 * each ring/block may need up to 8 bytes for alignment, hence the 1007 * additional bytes tacked onto the end. 1008 */ 1009 ring_header->size = size = 1010 sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 + 1011 sizeof(struct atl1c_rx_free_desc) * rx_desc_count + 1012 sizeof(struct atl1c_recv_ret_status) * rx_desc_count + 1013 8 * 4; 1014 1015 ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size, 1016 &ring_header->dma, GFP_KERNEL); 1017 if (unlikely(!ring_header->desc)) { 1018 dev_err(&pdev->dev, "could not get memory for DMA buffer\n"); 1019 goto err_nomem; 1020 } 1021 /* init TPD ring */ 1022 1023 tpd_ring[0].dma = roundup(ring_header->dma, 8); 1024 offset = tpd_ring[0].dma - ring_header->dma; 1025 for (i = 0; i < AT_MAX_TRANSMIT_QUEUE; i++) { 1026 tpd_ring[i].dma = ring_header->dma + offset; 1027 tpd_ring[i].desc = (u8 *) ring_header->desc + offset; 1028 tpd_ring[i].size = 1029 sizeof(struct atl1c_tpd_desc) * tpd_ring[i].count; 1030 offset += roundup(tpd_ring[i].size, 8); 1031 } 1032 /* init RFD ring */ 1033 rfd_ring->dma = ring_header->dma + offset; 1034 rfd_ring->desc = (u8 *) ring_header->desc + offset; 1035 rfd_ring->size = sizeof(struct atl1c_rx_free_desc) * rfd_ring->count; 1036 offset += roundup(rfd_ring->size, 8); 1037 1038 /* init RRD ring */ 1039 rrd_ring->dma = ring_header->dma + offset; 1040 rrd_ring->desc = (u8 *) ring_header->desc + offset; 1041 rrd_ring->size = sizeof(struct atl1c_recv_ret_status) * 1042 rrd_ring->count; 1043 offset += roundup(rrd_ring->size, 8); 1044 1045 return 0; 1046 1047 err_nomem: 1048 kfree(tpd_ring->buffer_info); 1049 return -ENOMEM; 1050 } 1051 1052 static void atl1c_configure_des_ring(struct atl1c_adapter *adapter) 1053 { 1054 struct atl1c_hw *hw = &adapter->hw; 1055 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1056 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1057 struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *) 1058 adapter->tpd_ring; 1059 1060 /* TPD */ 1061 AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI, 1062 (u32)((tpd_ring[atl1c_trans_normal].dma & 1063 AT_DMA_HI_ADDR_MASK) >> 32)); 1064 /* just enable normal priority TX queue */ 1065 AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO, 1066 (u32)(tpd_ring[atl1c_trans_normal].dma & 1067 AT_DMA_LO_ADDR_MASK)); 1068 AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO, 1069 (u32)(tpd_ring[atl1c_trans_high].dma & 1070 AT_DMA_LO_ADDR_MASK)); 1071 AT_WRITE_REG(hw, REG_TPD_RING_SIZE, 1072 (u32)(tpd_ring[0].count & TPD_RING_SIZE_MASK)); 1073 1074 1075 /* RFD */ 1076 AT_WRITE_REG(hw, REG_RX_BASE_ADDR_HI, 1077 (u32)((rfd_ring->dma & AT_DMA_HI_ADDR_MASK) >> 32)); 1078 AT_WRITE_REG(hw, REG_RFD0_HEAD_ADDR_LO, 1079 (u32)(rfd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1080 1081 AT_WRITE_REG(hw, REG_RFD_RING_SIZE, 1082 rfd_ring->count & RFD_RING_SIZE_MASK); 1083 AT_WRITE_REG(hw, REG_RX_BUF_SIZE, 1084 adapter->rx_buffer_len & RX_BUF_SIZE_MASK); 1085 1086 /* RRD */ 1087 AT_WRITE_REG(hw, REG_RRD0_HEAD_ADDR_LO, 1088 (u32)(rrd_ring->dma & AT_DMA_LO_ADDR_MASK)); 1089 AT_WRITE_REG(hw, REG_RRD_RING_SIZE, 1090 (rrd_ring->count & RRD_RING_SIZE_MASK)); 1091 1092 if (hw->nic_type == athr_l2c_b) { 1093 AT_WRITE_REG(hw, REG_SRAM_RXF_LEN, 0x02a0L); 1094 AT_WRITE_REG(hw, REG_SRAM_TXF_LEN, 0x0100L); 1095 AT_WRITE_REG(hw, REG_SRAM_RXF_ADDR, 0x029f0000L); 1096 AT_WRITE_REG(hw, REG_SRAM_RFD0_INFO, 0x02bf02a0L); 1097 AT_WRITE_REG(hw, REG_SRAM_TXF_ADDR, 0x03bf02c0L); 1098 AT_WRITE_REG(hw, REG_SRAM_TRD_ADDR, 0x03df03c0L); 1099 AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0); /* TX watermark, to enter l1 state.*/ 1100 AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0); /* RXD threshold.*/ 1101 } 1102 /* Load all of base address above */ 1103 AT_WRITE_REG(hw, REG_LOAD_PTR, 1); 1104 } 1105 1106 static void atl1c_configure_tx(struct atl1c_adapter *adapter) 1107 { 1108 struct atl1c_hw *hw = &adapter->hw; 1109 int max_pay_load; 1110 u16 tx_offload_thresh; 1111 u32 txq_ctrl_data; 1112 1113 tx_offload_thresh = MAX_TSO_FRAME_SIZE; 1114 AT_WRITE_REG(hw, REG_TX_TSO_OFFLOAD_THRESH, 1115 (tx_offload_thresh >> 3) & TX_TSO_OFFLOAD_THRESH_MASK); 1116 max_pay_load = pcie_get_readrq(adapter->pdev) >> 8; 1117 hw->dmar_block = min_t(u32, max_pay_load, hw->dmar_block); 1118 /* 1119 * if BIOS had changed the dam-read-max-length to an invalid value, 1120 * restore it to default value 1121 */ 1122 if (hw->dmar_block < DEVICE_CTRL_MAXRRS_MIN) { 1123 pcie_set_readrq(adapter->pdev, 128 << DEVICE_CTRL_MAXRRS_MIN); 1124 hw->dmar_block = DEVICE_CTRL_MAXRRS_MIN; 1125 } 1126 txq_ctrl_data = 1127 hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ? 1128 L2CB_TXQ_CFGV : L1C_TXQ_CFGV; 1129 1130 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq_ctrl_data); 1131 } 1132 1133 static void atl1c_configure_rx(struct atl1c_adapter *adapter) 1134 { 1135 struct atl1c_hw *hw = &adapter->hw; 1136 u32 rxq_ctrl_data; 1137 1138 rxq_ctrl_data = (hw->rfd_burst & RXQ_RFD_BURST_NUM_MASK) << 1139 RXQ_RFD_BURST_NUM_SHIFT; 1140 1141 if (hw->ctrl_flags & ATL1C_RX_IPV6_CHKSUM) 1142 rxq_ctrl_data |= IPV6_CHKSUM_CTRL_EN; 1143 1144 /* aspm for gigabit */ 1145 if (hw->nic_type != athr_l1d_2 && (hw->device_id & 1) != 0) 1146 rxq_ctrl_data = FIELD_SETX(rxq_ctrl_data, ASPM_THRUPUT_LIMIT, 1147 ASPM_THRUPUT_LIMIT_100M); 1148 1149 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq_ctrl_data); 1150 } 1151 1152 static void atl1c_configure_dma(struct atl1c_adapter *adapter) 1153 { 1154 struct atl1c_hw *hw = &adapter->hw; 1155 u32 dma_ctrl_data; 1156 1157 dma_ctrl_data = FIELDX(DMA_CTRL_RORDER_MODE, DMA_CTRL_RORDER_MODE_OUT) | 1158 DMA_CTRL_RREQ_PRI_DATA | 1159 FIELDX(DMA_CTRL_RREQ_BLEN, hw->dmar_block) | 1160 FIELDX(DMA_CTRL_WDLY_CNT, DMA_CTRL_WDLY_CNT_DEF) | 1161 FIELDX(DMA_CTRL_RDLY_CNT, DMA_CTRL_RDLY_CNT_DEF); 1162 1163 AT_WRITE_REG(hw, REG_DMA_CTRL, dma_ctrl_data); 1164 } 1165 1166 /* 1167 * Stop the mac, transmit and receive units 1168 * hw - Struct containing variables accessed by shared code 1169 * return : 0 or idle status (if error) 1170 */ 1171 static int atl1c_stop_mac(struct atl1c_hw *hw) 1172 { 1173 u32 data; 1174 1175 AT_READ_REG(hw, REG_RXQ_CTRL, &data); 1176 data &= ~RXQ_CTRL_EN; 1177 AT_WRITE_REG(hw, REG_RXQ_CTRL, data); 1178 1179 AT_READ_REG(hw, REG_TXQ_CTRL, &data); 1180 data &= ~TXQ_CTRL_EN; 1181 AT_WRITE_REG(hw, REG_TXQ_CTRL, data); 1182 1183 atl1c_wait_until_idle(hw, IDLE_STATUS_RXQ_BUSY | IDLE_STATUS_TXQ_BUSY); 1184 1185 AT_READ_REG(hw, REG_MAC_CTRL, &data); 1186 data &= ~(MAC_CTRL_TX_EN | MAC_CTRL_RX_EN); 1187 AT_WRITE_REG(hw, REG_MAC_CTRL, data); 1188 1189 return (int)atl1c_wait_until_idle(hw, 1190 IDLE_STATUS_TXMAC_BUSY | IDLE_STATUS_RXMAC_BUSY); 1191 } 1192 1193 static void atl1c_start_mac(struct atl1c_adapter *adapter) 1194 { 1195 struct atl1c_hw *hw = &adapter->hw; 1196 u32 mac, txq, rxq; 1197 1198 hw->mac_duplex = adapter->link_duplex == FULL_DUPLEX; 1199 hw->mac_speed = adapter->link_speed == SPEED_1000 ? 1200 atl1c_mac_speed_1000 : atl1c_mac_speed_10_100; 1201 1202 AT_READ_REG(hw, REG_TXQ_CTRL, &txq); 1203 AT_READ_REG(hw, REG_RXQ_CTRL, &rxq); 1204 AT_READ_REG(hw, REG_MAC_CTRL, &mac); 1205 1206 txq |= TXQ_CTRL_EN; 1207 rxq |= RXQ_CTRL_EN; 1208 mac |= MAC_CTRL_TX_EN | MAC_CTRL_TX_FLOW | 1209 MAC_CTRL_RX_EN | MAC_CTRL_RX_FLOW | 1210 MAC_CTRL_ADD_CRC | MAC_CTRL_PAD | 1211 MAC_CTRL_BC_EN | MAC_CTRL_SINGLE_PAUSE_EN | 1212 MAC_CTRL_HASH_ALG_CRC32; 1213 if (hw->mac_duplex) 1214 mac |= MAC_CTRL_DUPLX; 1215 else 1216 mac &= ~MAC_CTRL_DUPLX; 1217 mac = FIELD_SETX(mac, MAC_CTRL_SPEED, hw->mac_speed); 1218 mac = FIELD_SETX(mac, MAC_CTRL_PRMLEN, hw->preamble_len); 1219 1220 AT_WRITE_REG(hw, REG_TXQ_CTRL, txq); 1221 AT_WRITE_REG(hw, REG_RXQ_CTRL, rxq); 1222 AT_WRITE_REG(hw, REG_MAC_CTRL, mac); 1223 } 1224 1225 /* 1226 * Reset the transmit and receive units; mask and clear all interrupts. 1227 * hw - Struct containing variables accessed by shared code 1228 * return : 0 or idle status (if error) 1229 */ 1230 static int atl1c_reset_mac(struct atl1c_hw *hw) 1231 { 1232 struct atl1c_adapter *adapter = hw->adapter; 1233 struct pci_dev *pdev = adapter->pdev; 1234 u32 ctrl_data = 0; 1235 1236 atl1c_stop_mac(hw); 1237 /* 1238 * Issue Soft Reset to the MAC. This will reset the chip's 1239 * transmit, receive, DMA. It will not effect 1240 * the current PCI configuration. The global reset bit is self- 1241 * clearing, and should clear within a microsecond. 1242 */ 1243 AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data); 1244 ctrl_data |= MASTER_CTRL_OOB_DIS; 1245 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST); 1246 1247 AT_WRITE_FLUSH(hw); 1248 msleep(10); 1249 /* Wait at least 10ms for All module to be Idle */ 1250 1251 if (atl1c_wait_until_idle(hw, IDLE_STATUS_MASK)) { 1252 dev_err(&pdev->dev, 1253 "MAC state machine can't be idle since" 1254 " disabled for 10ms second\n"); 1255 return -1; 1256 } 1257 AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data); 1258 1259 /* driver control speed/duplex */ 1260 AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data); 1261 AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW); 1262 1263 /* clk switch setting */ 1264 AT_READ_REG(hw, REG_SERDES, &ctrl_data); 1265 switch (hw->nic_type) { 1266 case athr_l2c_b: 1267 ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN | 1268 SERDES_MAC_CLK_SLOWDOWN); 1269 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1270 break; 1271 case athr_l2c_b2: 1272 case athr_l1d_2: 1273 ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN; 1274 AT_WRITE_REG(hw, REG_SERDES, ctrl_data); 1275 break; 1276 default: 1277 break; 1278 } 1279 1280 return 0; 1281 } 1282 1283 static void atl1c_disable_l0s_l1(struct atl1c_hw *hw) 1284 { 1285 u16 ctrl_flags = hw->ctrl_flags; 1286 1287 hw->ctrl_flags &= ~(ATL1C_ASPM_L0S_SUPPORT | ATL1C_ASPM_L1_SUPPORT); 1288 atl1c_set_aspm(hw, SPEED_0); 1289 hw->ctrl_flags = ctrl_flags; 1290 } 1291 1292 /* 1293 * Set ASPM state. 1294 * Enable/disable L0s/L1 depend on link state. 1295 */ 1296 static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed) 1297 { 1298 u32 pm_ctrl_data; 1299 u32 link_l1_timer; 1300 1301 AT_READ_REG(hw, REG_PM_CTRL, &pm_ctrl_data); 1302 pm_ctrl_data &= ~(PM_CTRL_ASPM_L1_EN | 1303 PM_CTRL_ASPM_L0S_EN | 1304 PM_CTRL_MAC_ASPM_CHK); 1305 /* L1 timer */ 1306 if (hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1307 pm_ctrl_data &= ~PMCTRL_TXL1_AFTER_L0S; 1308 link_l1_timer = 1309 link_speed == SPEED_1000 || link_speed == SPEED_100 ? 1310 L1D_PMCTRL_L1_ENTRY_TM_16US : 1; 1311 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1312 L1D_PMCTRL_L1_ENTRY_TM, link_l1_timer); 1313 } else { 1314 link_l1_timer = hw->nic_type == athr_l2c_b ? 1315 L2CB1_PM_CTRL_L1_ENTRY_TM : L1C_PM_CTRL_L1_ENTRY_TM; 1316 if (link_speed != SPEED_1000 && link_speed != SPEED_100) 1317 link_l1_timer = 1; 1318 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1319 PM_CTRL_L1_ENTRY_TIMER, link_l1_timer); 1320 } 1321 1322 /* L0S/L1 enable */ 1323 if ((hw->ctrl_flags & ATL1C_ASPM_L0S_SUPPORT) && link_speed != SPEED_0) 1324 pm_ctrl_data |= PM_CTRL_ASPM_L0S_EN | PM_CTRL_MAC_ASPM_CHK; 1325 if (hw->ctrl_flags & ATL1C_ASPM_L1_SUPPORT) 1326 pm_ctrl_data |= PM_CTRL_ASPM_L1_EN | PM_CTRL_MAC_ASPM_CHK; 1327 1328 /* l2cb & l1d & l2cb2 & l1d2 */ 1329 if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d || 1330 hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) { 1331 pm_ctrl_data = FIELD_SETX(pm_ctrl_data, 1332 PM_CTRL_PM_REQ_TIMER, PM_CTRL_PM_REQ_TO_DEF); 1333 pm_ctrl_data |= PM_CTRL_RCVR_WT_TIMER | 1334 PM_CTRL_SERDES_PD_EX_L1 | 1335 PM_CTRL_CLK_SWH_L1; 1336 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1337 PM_CTRL_SERDES_PLL_L1_EN | 1338 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1339 PM_CTRL_SA_DLY_EN | 1340 PM_CTRL_HOTRST); 1341 /* disable l0s if link down or l2cb */ 1342 if (link_speed == SPEED_0 || hw->nic_type == athr_l2c_b) 1343 pm_ctrl_data &= ~PM_CTRL_ASPM_L0S_EN; 1344 } else { /* l1c */ 1345 pm_ctrl_data = 1346 FIELD_SETX(pm_ctrl_data, PM_CTRL_L1_ENTRY_TIMER, 0); 1347 if (link_speed != SPEED_0) { 1348 pm_ctrl_data |= PM_CTRL_SERDES_L1_EN | 1349 PM_CTRL_SERDES_PLL_L1_EN | 1350 PM_CTRL_SERDES_BUFS_RX_L1_EN; 1351 pm_ctrl_data &= ~(PM_CTRL_SERDES_PD_EX_L1 | 1352 PM_CTRL_CLK_SWH_L1 | 1353 PM_CTRL_ASPM_L0S_EN | 1354 PM_CTRL_ASPM_L1_EN); 1355 } else { /* link down */ 1356 pm_ctrl_data |= PM_CTRL_CLK_SWH_L1; 1357 pm_ctrl_data &= ~(PM_CTRL_SERDES_L1_EN | 1358 PM_CTRL_SERDES_PLL_L1_EN | 1359 PM_CTRL_SERDES_BUFS_RX_L1_EN | 1360 PM_CTRL_ASPM_L0S_EN); 1361 } 1362 } 1363 AT_WRITE_REG(hw, REG_PM_CTRL, pm_ctrl_data); 1364 1365 return; 1366 } 1367 1368 /** 1369 * atl1c_configure_mac - Configure Transmit&Receive Unit after Reset 1370 * @adapter: board private structure 1371 * 1372 * Configure the Tx /Rx unit of the MAC after a reset. 1373 */ 1374 static int atl1c_configure_mac(struct atl1c_adapter *adapter) 1375 { 1376 struct atl1c_hw *hw = &adapter->hw; 1377 u32 master_ctrl_data = 0; 1378 u32 intr_modrt_data; 1379 u32 data; 1380 1381 AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data); 1382 master_ctrl_data &= ~(MASTER_CTRL_TX_ITIMER_EN | 1383 MASTER_CTRL_RX_ITIMER_EN | 1384 MASTER_CTRL_INT_RDCLR); 1385 /* clear interrupt status */ 1386 AT_WRITE_REG(hw, REG_ISR, 0xFFFFFFFF); 1387 /* Clear any WOL status */ 1388 AT_WRITE_REG(hw, REG_WOL_CTRL, 0); 1389 /* set Interrupt Clear Timer 1390 * HW will enable self to assert interrupt event to system after 1391 * waiting x-time for software to notify it accept interrupt. 1392 */ 1393 1394 data = CLK_GATING_EN_ALL; 1395 if (hw->ctrl_flags & ATL1C_CLK_GATING_EN) { 1396 if (hw->nic_type == athr_l2c_b) 1397 data &= ~CLK_GATING_RXMAC_EN; 1398 } else 1399 data = 0; 1400 AT_WRITE_REG(hw, REG_CLK_GATING_CTRL, data); 1401 1402 AT_WRITE_REG(hw, REG_INT_RETRIG_TIMER, 1403 hw->ict & INT_RETRIG_TIMER_MASK); 1404 1405 atl1c_configure_des_ring(adapter); 1406 1407 if (hw->ctrl_flags & ATL1C_INTR_MODRT_ENABLE) { 1408 intr_modrt_data = (hw->tx_imt & IRQ_MODRT_TIMER_MASK) << 1409 IRQ_MODRT_TX_TIMER_SHIFT; 1410 intr_modrt_data |= (hw->rx_imt & IRQ_MODRT_TIMER_MASK) << 1411 IRQ_MODRT_RX_TIMER_SHIFT; 1412 AT_WRITE_REG(hw, REG_IRQ_MODRT_TIMER_INIT, intr_modrt_data); 1413 master_ctrl_data |= 1414 MASTER_CTRL_TX_ITIMER_EN | MASTER_CTRL_RX_ITIMER_EN; 1415 } 1416 1417 if (hw->ctrl_flags & ATL1C_INTR_CLEAR_ON_READ) 1418 master_ctrl_data |= MASTER_CTRL_INT_RDCLR; 1419 1420 master_ctrl_data |= MASTER_CTRL_SA_TIMER_EN; 1421 AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data); 1422 1423 AT_WRITE_REG(hw, REG_SMB_STAT_TIMER, 1424 hw->smb_timer & SMB_STAT_TIMER_MASK); 1425 1426 /* set MTU */ 1427 AT_WRITE_REG(hw, REG_MTU, hw->max_frame_size + ETH_HLEN + 1428 VLAN_HLEN + ETH_FCS_LEN); 1429 1430 atl1c_configure_tx(adapter); 1431 atl1c_configure_rx(adapter); 1432 atl1c_configure_dma(adapter); 1433 1434 return 0; 1435 } 1436 1437 static int atl1c_configure(struct atl1c_adapter *adapter) 1438 { 1439 struct net_device *netdev = adapter->netdev; 1440 int num; 1441 1442 atl1c_init_ring_ptrs(adapter); 1443 atl1c_set_multi(netdev); 1444 atl1c_restore_vlan(adapter); 1445 1446 num = atl1c_alloc_rx_buffer(adapter, false); 1447 if (unlikely(num == 0)) 1448 return -ENOMEM; 1449 1450 if (atl1c_configure_mac(adapter)) 1451 return -EIO; 1452 1453 return 0; 1454 } 1455 1456 static void atl1c_update_hw_stats(struct atl1c_adapter *adapter) 1457 { 1458 u16 hw_reg_addr = 0; 1459 unsigned long *stats_item = NULL; 1460 u32 data; 1461 1462 /* update rx status */ 1463 hw_reg_addr = REG_MAC_RX_STATUS_BIN; 1464 stats_item = &adapter->hw_stats.rx_ok; 1465 while (hw_reg_addr <= REG_MAC_RX_STATUS_END) { 1466 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1467 *stats_item += data; 1468 stats_item++; 1469 hw_reg_addr += 4; 1470 } 1471 /* update tx status */ 1472 hw_reg_addr = REG_MAC_TX_STATUS_BIN; 1473 stats_item = &adapter->hw_stats.tx_ok; 1474 while (hw_reg_addr <= REG_MAC_TX_STATUS_END) { 1475 AT_READ_REG(&adapter->hw, hw_reg_addr, &data); 1476 *stats_item += data; 1477 stats_item++; 1478 hw_reg_addr += 4; 1479 } 1480 } 1481 1482 /** 1483 * atl1c_get_stats - Get System Network Statistics 1484 * @netdev: network interface device structure 1485 * 1486 * Returns the address of the device statistics structure. 1487 * The statistics are actually updated from the timer callback. 1488 */ 1489 static struct net_device_stats *atl1c_get_stats(struct net_device *netdev) 1490 { 1491 struct atl1c_adapter *adapter = netdev_priv(netdev); 1492 struct atl1c_hw_stats *hw_stats = &adapter->hw_stats; 1493 struct net_device_stats *net_stats = &netdev->stats; 1494 1495 atl1c_update_hw_stats(adapter); 1496 net_stats->rx_bytes = hw_stats->rx_byte_cnt; 1497 net_stats->tx_bytes = hw_stats->tx_byte_cnt; 1498 net_stats->multicast = hw_stats->rx_mcast; 1499 net_stats->collisions = hw_stats->tx_1_col + 1500 hw_stats->tx_2_col + 1501 hw_stats->tx_late_col + 1502 hw_stats->tx_abort_col; 1503 1504 net_stats->rx_errors = hw_stats->rx_frag + 1505 hw_stats->rx_fcs_err + 1506 hw_stats->rx_len_err + 1507 hw_stats->rx_sz_ov + 1508 hw_stats->rx_rrd_ov + 1509 hw_stats->rx_align_err + 1510 hw_stats->rx_rxf_ov; 1511 1512 net_stats->rx_fifo_errors = hw_stats->rx_rxf_ov; 1513 net_stats->rx_length_errors = hw_stats->rx_len_err; 1514 net_stats->rx_crc_errors = hw_stats->rx_fcs_err; 1515 net_stats->rx_frame_errors = hw_stats->rx_align_err; 1516 net_stats->rx_dropped = hw_stats->rx_rrd_ov; 1517 1518 net_stats->tx_errors = hw_stats->tx_late_col + 1519 hw_stats->tx_abort_col + 1520 hw_stats->tx_underrun + 1521 hw_stats->tx_trunc; 1522 1523 net_stats->tx_fifo_errors = hw_stats->tx_underrun; 1524 net_stats->tx_aborted_errors = hw_stats->tx_abort_col; 1525 net_stats->tx_window_errors = hw_stats->tx_late_col; 1526 1527 net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors; 1528 net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors; 1529 1530 return net_stats; 1531 } 1532 1533 static inline void atl1c_clear_phy_int(struct atl1c_adapter *adapter) 1534 { 1535 u16 phy_data; 1536 1537 spin_lock(&adapter->mdio_lock); 1538 atl1c_read_phy_reg(&adapter->hw, MII_ISR, &phy_data); 1539 spin_unlock(&adapter->mdio_lock); 1540 } 1541 1542 static int atl1c_clean_tx(struct napi_struct *napi, int budget) 1543 { 1544 struct atl1c_adapter *adapter = 1545 container_of(napi, struct atl1c_adapter, tx_napi); 1546 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[atl1c_trans_normal]; 1547 struct atl1c_buffer *buffer_info; 1548 struct pci_dev *pdev = adapter->pdev; 1549 u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1550 u16 hw_next_to_clean; 1551 unsigned int total_bytes = 0, total_packets = 0; 1552 unsigned long flags; 1553 1554 AT_READ_REGW(&adapter->hw, REG_TPD_PRI0_CIDX, &hw_next_to_clean); 1555 1556 while (next_to_clean != hw_next_to_clean) { 1557 buffer_info = &tpd_ring->buffer_info[next_to_clean]; 1558 if (buffer_info->skb) { 1559 total_bytes += buffer_info->skb->len; 1560 total_packets++; 1561 } 1562 atl1c_clean_buffer(pdev, buffer_info); 1563 if (++next_to_clean == tpd_ring->count) 1564 next_to_clean = 0; 1565 atomic_set(&tpd_ring->next_to_clean, next_to_clean); 1566 } 1567 1568 netdev_completed_queue(adapter->netdev, total_packets, total_bytes); 1569 1570 if (netif_queue_stopped(adapter->netdev) && 1571 netif_carrier_ok(adapter->netdev)) { 1572 netif_wake_queue(adapter->netdev); 1573 } 1574 1575 if (total_packets < budget) { 1576 napi_complete_done(napi, total_packets); 1577 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags); 1578 adapter->hw.intr_mask |= ISR_TX_PKT; 1579 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1580 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags); 1581 return total_packets; 1582 } 1583 return budget; 1584 } 1585 1586 /** 1587 * atl1c_intr - Interrupt Handler 1588 * @irq: interrupt number 1589 * @data: pointer to a network interface device structure 1590 */ 1591 static irqreturn_t atl1c_intr(int irq, void *data) 1592 { 1593 struct net_device *netdev = data; 1594 struct atl1c_adapter *adapter = netdev_priv(netdev); 1595 struct pci_dev *pdev = adapter->pdev; 1596 struct atl1c_hw *hw = &adapter->hw; 1597 int max_ints = AT_MAX_INT_WORK; 1598 int handled = IRQ_NONE; 1599 u32 status; 1600 u32 reg_data; 1601 1602 do { 1603 AT_READ_REG(hw, REG_ISR, ®_data); 1604 status = reg_data & hw->intr_mask; 1605 1606 if (status == 0 || (status & ISR_DIS_INT) != 0) { 1607 if (max_ints != AT_MAX_INT_WORK) 1608 handled = IRQ_HANDLED; 1609 break; 1610 } 1611 /* link event */ 1612 if (status & ISR_GPHY) 1613 atl1c_clear_phy_int(adapter); 1614 /* Ack ISR */ 1615 AT_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT); 1616 if (status & ISR_RX_PKT) { 1617 if (likely(napi_schedule_prep(&adapter->napi))) { 1618 spin_lock(&hw->intr_mask_lock); 1619 hw->intr_mask &= ~ISR_RX_PKT; 1620 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask); 1621 spin_unlock(&hw->intr_mask_lock); 1622 __napi_schedule(&adapter->napi); 1623 } 1624 } 1625 if (status & ISR_TX_PKT) { 1626 if (napi_schedule_prep(&adapter->tx_napi)) { 1627 spin_lock(&hw->intr_mask_lock); 1628 hw->intr_mask &= ~ISR_TX_PKT; 1629 AT_WRITE_REG(hw, REG_IMR, hw->intr_mask); 1630 spin_unlock(&hw->intr_mask_lock); 1631 __napi_schedule(&adapter->tx_napi); 1632 } 1633 } 1634 1635 handled = IRQ_HANDLED; 1636 /* check if PCIE PHY Link down */ 1637 if (status & ISR_ERROR) { 1638 if (netif_msg_hw(adapter)) 1639 dev_err(&pdev->dev, 1640 "atl1c hardware error (status = 0x%x)\n", 1641 status & ISR_ERROR); 1642 /* reset MAC */ 1643 set_bit(ATL1C_WORK_EVENT_RESET, &adapter->work_event); 1644 schedule_work(&adapter->common_task); 1645 return IRQ_HANDLED; 1646 } 1647 1648 if (status & ISR_OVER) 1649 if (netif_msg_intr(adapter)) 1650 dev_warn(&pdev->dev, 1651 "TX/RX overflow (status = 0x%x)\n", 1652 status & ISR_OVER); 1653 1654 /* link event */ 1655 if (status & (ISR_GPHY | ISR_MANUAL)) { 1656 netdev->stats.tx_carrier_errors++; 1657 atl1c_link_chg_event(adapter); 1658 break; 1659 } 1660 1661 } while (--max_ints > 0); 1662 /* re-enable Interrupt*/ 1663 AT_WRITE_REG(&adapter->hw, REG_ISR, 0); 1664 return handled; 1665 } 1666 1667 static inline void atl1c_rx_checksum(struct atl1c_adapter *adapter, 1668 struct sk_buff *skb, struct atl1c_recv_ret_status *prrs) 1669 { 1670 if (adapter->hw.nic_type == athr_mt) { 1671 if (prrs->word3 & RRS_MT_PROT_ID_TCPUDP) 1672 skb->ip_summed = CHECKSUM_UNNECESSARY; 1673 return; 1674 } 1675 /* 1676 * The pid field in RRS in not correct sometimes, so we 1677 * cannot figure out if the packet is fragmented or not, 1678 * so we tell the KERNEL CHECKSUM_NONE 1679 */ 1680 skb_checksum_none_assert(skb); 1681 } 1682 1683 static struct sk_buff *atl1c_alloc_skb(struct atl1c_adapter *adapter, 1684 bool napi_mode) 1685 { 1686 struct sk_buff *skb; 1687 struct page *page; 1688 1689 if (adapter->rx_frag_size > PAGE_SIZE) { 1690 if (likely(napi_mode)) 1691 return napi_alloc_skb(&adapter->napi, 1692 adapter->rx_buffer_len); 1693 else 1694 return netdev_alloc_skb_ip_align(adapter->netdev, 1695 adapter->rx_buffer_len); 1696 } 1697 1698 page = adapter->rx_page; 1699 if (!page) { 1700 adapter->rx_page = page = alloc_page(GFP_ATOMIC); 1701 if (unlikely(!page)) 1702 return NULL; 1703 adapter->rx_page_offset = 0; 1704 } 1705 1706 skb = build_skb(page_address(page) + adapter->rx_page_offset, 1707 adapter->rx_frag_size); 1708 if (likely(skb)) { 1709 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); 1710 adapter->rx_page_offset += adapter->rx_frag_size; 1711 if (adapter->rx_page_offset >= PAGE_SIZE) 1712 adapter->rx_page = NULL; 1713 else 1714 get_page(page); 1715 } 1716 return skb; 1717 } 1718 1719 static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter, bool napi_mode) 1720 { 1721 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1722 struct pci_dev *pdev = adapter->pdev; 1723 struct atl1c_buffer *buffer_info, *next_info; 1724 struct sk_buff *skb; 1725 void *vir_addr = NULL; 1726 u16 num_alloc = 0; 1727 u16 rfd_next_to_use, next_next; 1728 struct atl1c_rx_free_desc *rfd_desc; 1729 dma_addr_t mapping; 1730 1731 next_next = rfd_next_to_use = rfd_ring->next_to_use; 1732 if (++next_next == rfd_ring->count) 1733 next_next = 0; 1734 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1735 next_info = &rfd_ring->buffer_info[next_next]; 1736 1737 while (next_info->flags & ATL1C_BUFFER_FREE) { 1738 rfd_desc = ATL1C_RFD_DESC(rfd_ring, rfd_next_to_use); 1739 1740 skb = atl1c_alloc_skb(adapter, napi_mode); 1741 if (unlikely(!skb)) { 1742 if (netif_msg_rx_err(adapter)) 1743 dev_warn(&pdev->dev, "alloc rx buffer failed\n"); 1744 break; 1745 } 1746 1747 /* 1748 * Make buffer alignment 2 beyond a 16 byte boundary 1749 * this will result in a 16 byte aligned IP header after 1750 * the 14 byte MAC header is removed 1751 */ 1752 vir_addr = skb->data; 1753 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 1754 buffer_info->skb = skb; 1755 buffer_info->length = adapter->rx_buffer_len; 1756 mapping = dma_map_single(&pdev->dev, vir_addr, 1757 buffer_info->length, DMA_FROM_DEVICE); 1758 if (unlikely(dma_mapping_error(&pdev->dev, mapping))) { 1759 dev_kfree_skb(skb); 1760 buffer_info->skb = NULL; 1761 buffer_info->length = 0; 1762 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_FREE); 1763 netif_warn(adapter, rx_err, adapter->netdev, "RX pci_map_single failed"); 1764 break; 1765 } 1766 buffer_info->dma = mapping; 1767 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 1768 ATL1C_PCIMAP_FROMDEVICE); 1769 rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 1770 rfd_next_to_use = next_next; 1771 if (++next_next == rfd_ring->count) 1772 next_next = 0; 1773 buffer_info = &rfd_ring->buffer_info[rfd_next_to_use]; 1774 next_info = &rfd_ring->buffer_info[next_next]; 1775 num_alloc++; 1776 } 1777 1778 if (num_alloc) { 1779 /* TODO: update mailbox here */ 1780 wmb(); 1781 rfd_ring->next_to_use = rfd_next_to_use; 1782 AT_WRITE_REG(&adapter->hw, REG_MB_RFD0_PROD_IDX, 1783 rfd_ring->next_to_use & MB_RFDX_PROD_IDX_MASK); 1784 } 1785 1786 return num_alloc; 1787 } 1788 1789 static void atl1c_clean_rrd(struct atl1c_rrd_ring *rrd_ring, 1790 struct atl1c_recv_ret_status *rrs, u16 num) 1791 { 1792 u16 i; 1793 /* the relationship between rrd and rfd is one map one */ 1794 for (i = 0; i < num; i++, rrs = ATL1C_RRD_DESC(rrd_ring, 1795 rrd_ring->next_to_clean)) { 1796 rrs->word3 &= ~RRS_RXD_UPDATED; 1797 if (++rrd_ring->next_to_clean == rrd_ring->count) 1798 rrd_ring->next_to_clean = 0; 1799 } 1800 } 1801 1802 static void atl1c_clean_rfd(struct atl1c_rfd_ring *rfd_ring, 1803 struct atl1c_recv_ret_status *rrs, u16 num) 1804 { 1805 u16 i; 1806 u16 rfd_index; 1807 struct atl1c_buffer *buffer_info = rfd_ring->buffer_info; 1808 1809 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1810 RRS_RX_RFD_INDEX_MASK; 1811 for (i = 0; i < num; i++) { 1812 buffer_info[rfd_index].skb = NULL; 1813 ATL1C_SET_BUFFER_STATE(&buffer_info[rfd_index], 1814 ATL1C_BUFFER_FREE); 1815 if (++rfd_index == rfd_ring->count) 1816 rfd_index = 0; 1817 } 1818 rfd_ring->next_to_clean = rfd_index; 1819 } 1820 1821 static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, 1822 int *work_done, int work_to_do) 1823 { 1824 u16 rfd_num, rfd_index; 1825 u16 count = 0; 1826 u16 length; 1827 struct pci_dev *pdev = adapter->pdev; 1828 struct net_device *netdev = adapter->netdev; 1829 struct atl1c_rfd_ring *rfd_ring = &adapter->rfd_ring; 1830 struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring; 1831 struct sk_buff *skb; 1832 struct atl1c_recv_ret_status *rrs; 1833 struct atl1c_buffer *buffer_info; 1834 1835 while (1) { 1836 if (*work_done >= work_to_do) 1837 break; 1838 rrs = ATL1C_RRD_DESC(rrd_ring, rrd_ring->next_to_clean); 1839 if (likely(RRS_RXD_IS_VALID(rrs->word3))) { 1840 rfd_num = (rrs->word0 >> RRS_RX_RFD_CNT_SHIFT) & 1841 RRS_RX_RFD_CNT_MASK; 1842 if (unlikely(rfd_num != 1)) 1843 /* TODO support mul rfd*/ 1844 if (netif_msg_rx_err(adapter)) 1845 dev_warn(&pdev->dev, 1846 "Multi rfd not support yet!\n"); 1847 goto rrs_checked; 1848 } else { 1849 break; 1850 } 1851 rrs_checked: 1852 atl1c_clean_rrd(rrd_ring, rrs, rfd_num); 1853 if (rrs->word3 & (RRS_RX_ERR_SUM | RRS_802_3_LEN_ERR)) { 1854 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1855 if (netif_msg_rx_err(adapter)) 1856 dev_warn(&pdev->dev, 1857 "wrong packet! rrs word3 is %x\n", 1858 rrs->word3); 1859 continue; 1860 } 1861 1862 length = le16_to_cpu((rrs->word3 >> RRS_PKT_SIZE_SHIFT) & 1863 RRS_PKT_SIZE_MASK); 1864 /* Good Receive */ 1865 if (likely(rfd_num == 1)) { 1866 rfd_index = (rrs->word0 >> RRS_RX_RFD_INDEX_SHIFT) & 1867 RRS_RX_RFD_INDEX_MASK; 1868 buffer_info = &rfd_ring->buffer_info[rfd_index]; 1869 dma_unmap_single(&pdev->dev, buffer_info->dma, 1870 buffer_info->length, DMA_FROM_DEVICE); 1871 skb = buffer_info->skb; 1872 } else { 1873 /* TODO */ 1874 if (netif_msg_rx_err(adapter)) 1875 dev_warn(&pdev->dev, 1876 "Multi rfd not support yet!\n"); 1877 break; 1878 } 1879 atl1c_clean_rfd(rfd_ring, rrs, rfd_num); 1880 skb_put(skb, length - ETH_FCS_LEN); 1881 skb->protocol = eth_type_trans(skb, netdev); 1882 atl1c_rx_checksum(adapter, skb, rrs); 1883 if (rrs->word3 & RRS_VLAN_INS) { 1884 u16 vlan; 1885 1886 AT_TAG_TO_VLAN(rrs->vlan_tag, vlan); 1887 vlan = le16_to_cpu(vlan); 1888 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan); 1889 } 1890 napi_gro_receive(&adapter->napi, skb); 1891 1892 (*work_done)++; 1893 count++; 1894 } 1895 if (count) 1896 atl1c_alloc_rx_buffer(adapter, true); 1897 } 1898 1899 /** 1900 * atl1c_clean - NAPI Rx polling callback 1901 * @napi: napi info 1902 * @budget: limit of packets to clean 1903 */ 1904 static int atl1c_clean(struct napi_struct *napi, int budget) 1905 { 1906 struct atl1c_adapter *adapter = 1907 container_of(napi, struct atl1c_adapter, napi); 1908 int work_done = 0; 1909 unsigned long flags; 1910 1911 /* Keep link state information with original netdev */ 1912 if (!netif_carrier_ok(adapter->netdev)) 1913 goto quit_polling; 1914 /* just enable one RXQ */ 1915 atl1c_clean_rx_irq(adapter, &work_done, budget); 1916 1917 if (work_done < budget) { 1918 quit_polling: 1919 napi_complete_done(napi, work_done); 1920 spin_lock_irqsave(&adapter->hw.intr_mask_lock, flags); 1921 adapter->hw.intr_mask |= ISR_RX_PKT; 1922 AT_WRITE_REG(&adapter->hw, REG_IMR, adapter->hw.intr_mask); 1923 spin_unlock_irqrestore(&adapter->hw.intr_mask_lock, flags); 1924 } 1925 return work_done; 1926 } 1927 1928 #ifdef CONFIG_NET_POLL_CONTROLLER 1929 1930 /* 1931 * Polling 'interrupt' - used by things like netconsole to send skbs 1932 * without having to re-enable interrupts. It's not called while 1933 * the interrupt routine is executing. 1934 */ 1935 static void atl1c_netpoll(struct net_device *netdev) 1936 { 1937 struct atl1c_adapter *adapter = netdev_priv(netdev); 1938 1939 disable_irq(adapter->pdev->irq); 1940 atl1c_intr(adapter->pdev->irq, netdev); 1941 enable_irq(adapter->pdev->irq); 1942 } 1943 #endif 1944 1945 static inline u16 atl1c_tpd_avail(struct atl1c_adapter *adapter, enum atl1c_trans_queue type) 1946 { 1947 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1948 u16 next_to_use = 0; 1949 u16 next_to_clean = 0; 1950 1951 next_to_clean = atomic_read(&tpd_ring->next_to_clean); 1952 next_to_use = tpd_ring->next_to_use; 1953 1954 return (u16)(next_to_clean > next_to_use) ? 1955 (next_to_clean - next_to_use - 1) : 1956 (tpd_ring->count + next_to_clean - next_to_use - 1); 1957 } 1958 1959 /* 1960 * get next usable tpd 1961 * Note: should call atl1c_tdp_avail to make sure 1962 * there is enough tpd to use 1963 */ 1964 static struct atl1c_tpd_desc *atl1c_get_tpd(struct atl1c_adapter *adapter, 1965 enum atl1c_trans_queue type) 1966 { 1967 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 1968 struct atl1c_tpd_desc *tpd_desc; 1969 u16 next_to_use = 0; 1970 1971 next_to_use = tpd_ring->next_to_use; 1972 if (++tpd_ring->next_to_use == tpd_ring->count) 1973 tpd_ring->next_to_use = 0; 1974 tpd_desc = ATL1C_TPD_DESC(tpd_ring, next_to_use); 1975 memset(tpd_desc, 0, sizeof(struct atl1c_tpd_desc)); 1976 return tpd_desc; 1977 } 1978 1979 static struct atl1c_buffer * 1980 atl1c_get_tx_buffer(struct atl1c_adapter *adapter, struct atl1c_tpd_desc *tpd) 1981 { 1982 struct atl1c_tpd_ring *tpd_ring = adapter->tpd_ring; 1983 1984 return &tpd_ring->buffer_info[tpd - 1985 (struct atl1c_tpd_desc *)tpd_ring->desc]; 1986 } 1987 1988 /* Calculate the transmit packet descript needed*/ 1989 static u16 atl1c_cal_tpd_req(const struct sk_buff *skb) 1990 { 1991 u16 tpd_req; 1992 u16 proto_hdr_len = 0; 1993 1994 tpd_req = skb_shinfo(skb)->nr_frags + 1; 1995 1996 if (skb_is_gso(skb)) { 1997 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 1998 if (proto_hdr_len < skb_headlen(skb)) 1999 tpd_req++; 2000 if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) 2001 tpd_req++; 2002 } 2003 return tpd_req; 2004 } 2005 2006 static int atl1c_tso_csum(struct atl1c_adapter *adapter, 2007 struct sk_buff *skb, 2008 struct atl1c_tpd_desc **tpd, 2009 enum atl1c_trans_queue type) 2010 { 2011 struct pci_dev *pdev = adapter->pdev; 2012 unsigned short offload_type; 2013 u8 hdr_len; 2014 u32 real_len; 2015 2016 if (skb_is_gso(skb)) { 2017 int err; 2018 2019 err = skb_cow_head(skb, 0); 2020 if (err < 0) 2021 return err; 2022 2023 offload_type = skb_shinfo(skb)->gso_type; 2024 2025 if (offload_type & SKB_GSO_TCPV4) { 2026 real_len = (((unsigned char *)ip_hdr(skb) - skb->data) 2027 + ntohs(ip_hdr(skb)->tot_len)); 2028 2029 if (real_len < skb->len) 2030 pskb_trim(skb, real_len); 2031 2032 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 2033 if (unlikely(skb->len == hdr_len)) { 2034 /* only xsum need */ 2035 if (netif_msg_tx_queued(adapter)) 2036 dev_warn(&pdev->dev, 2037 "IPV4 tso with zero data??\n"); 2038 goto check_sum; 2039 } else { 2040 ip_hdr(skb)->check = 0; 2041 tcp_hdr(skb)->check = ~csum_tcpudp_magic( 2042 ip_hdr(skb)->saddr, 2043 ip_hdr(skb)->daddr, 2044 0, IPPROTO_TCP, 0); 2045 (*tpd)->word1 |= 1 << TPD_IPV4_PACKET_SHIFT; 2046 } 2047 } 2048 2049 if (offload_type & SKB_GSO_TCPV6) { 2050 struct atl1c_tpd_ext_desc *etpd = 2051 *(struct atl1c_tpd_ext_desc **)(tpd); 2052 2053 memset(etpd, 0, sizeof(struct atl1c_tpd_ext_desc)); 2054 *tpd = atl1c_get_tpd(adapter, type); 2055 ipv6_hdr(skb)->payload_len = 0; 2056 /* check payload == 0 byte ? */ 2057 hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb)); 2058 if (unlikely(skb->len == hdr_len)) { 2059 /* only xsum need */ 2060 if (netif_msg_tx_queued(adapter)) 2061 dev_warn(&pdev->dev, 2062 "IPV6 tso with zero data??\n"); 2063 goto check_sum; 2064 } else 2065 tcp_v6_gso_csum_prep(skb); 2066 2067 etpd->word1 |= 1 << TPD_LSO_EN_SHIFT; 2068 etpd->word1 |= 1 << TPD_LSO_VER_SHIFT; 2069 etpd->pkt_len = cpu_to_le32(skb->len); 2070 (*tpd)->word1 |= 1 << TPD_LSO_VER_SHIFT; 2071 } 2072 2073 (*tpd)->word1 |= 1 << TPD_LSO_EN_SHIFT; 2074 (*tpd)->word1 |= (skb_transport_offset(skb) & TPD_TCPHDR_OFFSET_MASK) << 2075 TPD_TCPHDR_OFFSET_SHIFT; 2076 (*tpd)->word1 |= (skb_shinfo(skb)->gso_size & TPD_MSS_MASK) << 2077 TPD_MSS_SHIFT; 2078 return 0; 2079 } 2080 2081 check_sum: 2082 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 2083 u8 css, cso; 2084 cso = skb_checksum_start_offset(skb); 2085 2086 if (unlikely(cso & 0x1)) { 2087 if (netif_msg_tx_err(adapter)) 2088 dev_err(&adapter->pdev->dev, 2089 "payload offset should not an event number\n"); 2090 return -1; 2091 } else { 2092 css = cso + skb->csum_offset; 2093 2094 (*tpd)->word1 |= ((cso >> 1) & TPD_PLOADOFFSET_MASK) << 2095 TPD_PLOADOFFSET_SHIFT; 2096 (*tpd)->word1 |= ((css >> 1) & TPD_CCSUM_OFFSET_MASK) << 2097 TPD_CCSUM_OFFSET_SHIFT; 2098 (*tpd)->word1 |= 1 << TPD_CCSUM_EN_SHIFT; 2099 } 2100 } 2101 return 0; 2102 } 2103 2104 static void atl1c_tx_rollback(struct atl1c_adapter *adpt, 2105 struct atl1c_tpd_desc *first_tpd, 2106 enum atl1c_trans_queue type) 2107 { 2108 struct atl1c_tpd_ring *tpd_ring = &adpt->tpd_ring[type]; 2109 struct atl1c_buffer *buffer_info; 2110 struct atl1c_tpd_desc *tpd; 2111 u16 first_index, index; 2112 2113 first_index = first_tpd - (struct atl1c_tpd_desc *)tpd_ring->desc; 2114 index = first_index; 2115 while (index != tpd_ring->next_to_use) { 2116 tpd = ATL1C_TPD_DESC(tpd_ring, index); 2117 buffer_info = &tpd_ring->buffer_info[index]; 2118 atl1c_clean_buffer(adpt->pdev, buffer_info); 2119 memset(tpd, 0, sizeof(struct atl1c_tpd_desc)); 2120 if (++index == tpd_ring->count) 2121 index = 0; 2122 } 2123 tpd_ring->next_to_use = first_index; 2124 } 2125 2126 static int atl1c_tx_map(struct atl1c_adapter *adapter, 2127 struct sk_buff *skb, struct atl1c_tpd_desc *tpd, 2128 enum atl1c_trans_queue type) 2129 { 2130 struct atl1c_tpd_desc *use_tpd = NULL; 2131 struct atl1c_buffer *buffer_info = NULL; 2132 u16 buf_len = skb_headlen(skb); 2133 u16 map_len = 0; 2134 u16 mapped_len = 0; 2135 u16 hdr_len = 0; 2136 u16 nr_frags; 2137 u16 f; 2138 int tso; 2139 2140 nr_frags = skb_shinfo(skb)->nr_frags; 2141 tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK; 2142 if (tso) { 2143 /* TSO */ 2144 map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 2145 use_tpd = tpd; 2146 2147 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2148 buffer_info->length = map_len; 2149 buffer_info->dma = dma_map_single(&adapter->pdev->dev, 2150 skb->data, hdr_len, 2151 DMA_TO_DEVICE); 2152 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2153 goto err_dma; 2154 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2155 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2156 ATL1C_PCIMAP_TODEVICE); 2157 mapped_len += map_len; 2158 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2159 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2160 } 2161 2162 if (mapped_len < buf_len) { 2163 /* mapped_len == 0, means we should use the first tpd, 2164 which is given by caller */ 2165 if (mapped_len == 0) 2166 use_tpd = tpd; 2167 else { 2168 use_tpd = atl1c_get_tpd(adapter, type); 2169 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2170 } 2171 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2172 buffer_info->length = buf_len - mapped_len; 2173 buffer_info->dma = 2174 dma_map_single(&adapter->pdev->dev, 2175 skb->data + mapped_len, 2176 buffer_info->length, DMA_TO_DEVICE); 2177 if (unlikely(dma_mapping_error(&adapter->pdev->dev, buffer_info->dma))) 2178 goto err_dma; 2179 2180 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2181 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_SINGLE, 2182 ATL1C_PCIMAP_TODEVICE); 2183 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2184 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2185 } 2186 2187 for (f = 0; f < nr_frags; f++) { 2188 skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 2189 2190 use_tpd = atl1c_get_tpd(adapter, type); 2191 memcpy(use_tpd, tpd, sizeof(struct atl1c_tpd_desc)); 2192 2193 buffer_info = atl1c_get_tx_buffer(adapter, use_tpd); 2194 buffer_info->length = skb_frag_size(frag); 2195 buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev, 2196 frag, 0, 2197 buffer_info->length, 2198 DMA_TO_DEVICE); 2199 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) 2200 goto err_dma; 2201 2202 ATL1C_SET_BUFFER_STATE(buffer_info, ATL1C_BUFFER_BUSY); 2203 ATL1C_SET_PCIMAP_TYPE(buffer_info, ATL1C_PCIMAP_PAGE, 2204 ATL1C_PCIMAP_TODEVICE); 2205 use_tpd->buffer_addr = cpu_to_le64(buffer_info->dma); 2206 use_tpd->buffer_len = cpu_to_le16(buffer_info->length); 2207 } 2208 2209 /* The last tpd */ 2210 use_tpd->word1 |= 1 << TPD_EOP_SHIFT; 2211 /* The last buffer info contain the skb address, 2212 so it will be free after unmap */ 2213 buffer_info->skb = skb; 2214 2215 return 0; 2216 2217 err_dma: 2218 buffer_info->dma = 0; 2219 buffer_info->length = 0; 2220 return -1; 2221 } 2222 2223 static void atl1c_tx_queue(struct atl1c_adapter *adapter, 2224 enum atl1c_trans_queue type) 2225 { 2226 struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type]; 2227 u16 reg; 2228 2229 reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX; 2230 AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use); 2231 } 2232 2233 static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, 2234 struct net_device *netdev) 2235 { 2236 struct atl1c_adapter *adapter = netdev_priv(netdev); 2237 u16 tpd_req; 2238 struct atl1c_tpd_desc *tpd; 2239 enum atl1c_trans_queue type = atl1c_trans_normal; 2240 2241 if (test_bit(__AT_DOWN, &adapter->flags)) { 2242 dev_kfree_skb_any(skb); 2243 return NETDEV_TX_OK; 2244 } 2245 2246 tpd_req = atl1c_cal_tpd_req(skb); 2247 2248 if (atl1c_tpd_avail(adapter, type) < tpd_req) { 2249 /* no enough descriptor, just stop queue */ 2250 atl1c_tx_queue(adapter, type); 2251 netif_stop_queue(netdev); 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 atl1c_tx_queue(adapter, type); 2260 dev_kfree_skb_any(skb); 2261 return NETDEV_TX_OK; 2262 } 2263 2264 if (unlikely(skb_vlan_tag_present(skb))) { 2265 u16 vlan = skb_vlan_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 if (atl1c_tx_map(adapter, skb, tpd, type) < 0) { 2278 netif_info(adapter, tx_done, adapter->netdev, 2279 "tx-skb dropped due to dma error\n"); 2280 /* roll back tpd/buffer */ 2281 atl1c_tx_rollback(adapter, tpd, type); 2282 dev_kfree_skb_any(skb); 2283 } else { 2284 bool more = netdev_xmit_more(); 2285 2286 if (__netdev_sent_queue(adapter->netdev, skb->len, more)) 2287 atl1c_tx_queue(adapter, type); 2288 } 2289 2290 return NETDEV_TX_OK; 2291 } 2292 2293 static void atl1c_free_irq(struct atl1c_adapter *adapter) 2294 { 2295 struct net_device *netdev = adapter->netdev; 2296 2297 free_irq(adapter->pdev->irq, netdev); 2298 2299 if (adapter->have_msi) 2300 pci_disable_msi(adapter->pdev); 2301 } 2302 2303 static int atl1c_request_irq(struct atl1c_adapter *adapter) 2304 { 2305 struct pci_dev *pdev = adapter->pdev; 2306 struct net_device *netdev = adapter->netdev; 2307 int flags = 0; 2308 int err = 0; 2309 2310 adapter->have_msi = true; 2311 err = pci_enable_msi(adapter->pdev); 2312 if (err) { 2313 if (netif_msg_ifup(adapter)) 2314 dev_err(&pdev->dev, 2315 "Unable to allocate MSI interrupt Error: %d\n", 2316 err); 2317 adapter->have_msi = false; 2318 } 2319 2320 if (!adapter->have_msi) 2321 flags |= IRQF_SHARED; 2322 err = request_irq(adapter->pdev->irq, atl1c_intr, flags, 2323 netdev->name, netdev); 2324 if (err) { 2325 if (netif_msg_ifup(adapter)) 2326 dev_err(&pdev->dev, 2327 "Unable to allocate interrupt Error: %d\n", 2328 err); 2329 if (adapter->have_msi) 2330 pci_disable_msi(adapter->pdev); 2331 return err; 2332 } 2333 if (netif_msg_ifup(adapter)) 2334 dev_dbg(&pdev->dev, "atl1c_request_irq OK\n"); 2335 return err; 2336 } 2337 2338 2339 static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter) 2340 { 2341 /* release tx-pending skbs and reset tx/rx ring index */ 2342 atl1c_clean_tx_ring(adapter, atl1c_trans_normal); 2343 atl1c_clean_tx_ring(adapter, atl1c_trans_high); 2344 atl1c_clean_rx_ring(adapter); 2345 } 2346 2347 static int atl1c_up(struct atl1c_adapter *adapter) 2348 { 2349 struct net_device *netdev = adapter->netdev; 2350 int err; 2351 2352 netif_carrier_off(netdev); 2353 2354 err = atl1c_configure(adapter); 2355 if (unlikely(err)) 2356 goto err_up; 2357 2358 err = atl1c_request_irq(adapter); 2359 if (unlikely(err)) 2360 goto err_up; 2361 2362 atl1c_check_link_status(adapter); 2363 clear_bit(__AT_DOWN, &adapter->flags); 2364 napi_enable(&adapter->napi); 2365 napi_enable(&adapter->tx_napi); 2366 atl1c_irq_enable(adapter); 2367 netif_start_queue(netdev); 2368 return err; 2369 2370 err_up: 2371 atl1c_clean_rx_ring(adapter); 2372 return err; 2373 } 2374 2375 static void atl1c_down(struct atl1c_adapter *adapter) 2376 { 2377 struct net_device *netdev = adapter->netdev; 2378 2379 atl1c_del_timer(adapter); 2380 adapter->work_event = 0; /* clear all event */ 2381 /* signal that we're down so the interrupt handler does not 2382 * reschedule our watchdog timer */ 2383 set_bit(__AT_DOWN, &adapter->flags); 2384 netif_carrier_off(netdev); 2385 napi_disable(&adapter->napi); 2386 napi_disable(&adapter->tx_napi); 2387 atl1c_irq_disable(adapter); 2388 atl1c_free_irq(adapter); 2389 /* disable ASPM if device inactive */ 2390 atl1c_disable_l0s_l1(&adapter->hw); 2391 /* reset MAC to disable all RX/TX */ 2392 atl1c_reset_mac(&adapter->hw); 2393 msleep(1); 2394 2395 adapter->link_speed = SPEED_0; 2396 adapter->link_duplex = -1; 2397 atl1c_reset_dma_ring(adapter); 2398 } 2399 2400 /** 2401 * atl1c_open - Called when a network interface is made active 2402 * @netdev: network interface device structure 2403 * 2404 * Returns 0 on success, negative value on failure 2405 * 2406 * The open entry point is called when a network interface is made 2407 * active by the system (IFF_UP). At this point all resources needed 2408 * for transmit and receive operations are allocated, the interrupt 2409 * handler is registered with the OS, the watchdog timer is started, 2410 * and the stack is notified that the interface is ready. 2411 */ 2412 static int atl1c_open(struct net_device *netdev) 2413 { 2414 struct atl1c_adapter *adapter = netdev_priv(netdev); 2415 int err; 2416 2417 /* disallow open during test */ 2418 if (test_bit(__AT_TESTING, &adapter->flags)) 2419 return -EBUSY; 2420 2421 /* allocate rx/tx dma buffer & descriptors */ 2422 err = atl1c_setup_ring_resources(adapter); 2423 if (unlikely(err)) 2424 return err; 2425 2426 err = atl1c_up(adapter); 2427 if (unlikely(err)) 2428 goto err_up; 2429 2430 return 0; 2431 2432 err_up: 2433 atl1c_free_irq(adapter); 2434 atl1c_free_ring_resources(adapter); 2435 atl1c_reset_mac(&adapter->hw); 2436 return err; 2437 } 2438 2439 /** 2440 * atl1c_close - Disables a network interface 2441 * @netdev: network interface device structure 2442 * 2443 * Returns 0, this is not allowed to fail 2444 * 2445 * The close entry point is called when an interface is de-activated 2446 * by the OS. The hardware is still under the drivers control, but 2447 * needs to be disabled. A global MAC reset is issued to stop the 2448 * hardware, and all transmit and receive resources are freed. 2449 */ 2450 static int atl1c_close(struct net_device *netdev) 2451 { 2452 struct atl1c_adapter *adapter = netdev_priv(netdev); 2453 2454 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2455 set_bit(__AT_DOWN, &adapter->flags); 2456 cancel_work_sync(&adapter->common_task); 2457 atl1c_down(adapter); 2458 atl1c_free_ring_resources(adapter); 2459 return 0; 2460 } 2461 2462 static int atl1c_suspend(struct device *dev) 2463 { 2464 struct net_device *netdev = dev_get_drvdata(dev); 2465 struct atl1c_adapter *adapter = netdev_priv(netdev); 2466 struct atl1c_hw *hw = &adapter->hw; 2467 u32 wufc = adapter->wol; 2468 2469 atl1c_disable_l0s_l1(hw); 2470 if (netif_running(netdev)) { 2471 WARN_ON(test_bit(__AT_RESETTING, &adapter->flags)); 2472 atl1c_down(adapter); 2473 } 2474 netif_device_detach(netdev); 2475 2476 if (wufc) 2477 if (atl1c_phy_to_ps_link(hw) != 0) 2478 dev_dbg(dev, "phy power saving failed"); 2479 2480 atl1c_power_saving(hw, wufc); 2481 2482 return 0; 2483 } 2484 2485 #ifdef CONFIG_PM_SLEEP 2486 static int atl1c_resume(struct device *dev) 2487 { 2488 struct net_device *netdev = dev_get_drvdata(dev); 2489 struct atl1c_adapter *adapter = netdev_priv(netdev); 2490 2491 AT_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0); 2492 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2493 2494 atl1c_phy_reset(&adapter->hw); 2495 atl1c_reset_mac(&adapter->hw); 2496 atl1c_phy_init(&adapter->hw); 2497 2498 netif_device_attach(netdev); 2499 if (netif_running(netdev)) 2500 atl1c_up(adapter); 2501 2502 return 0; 2503 } 2504 #endif 2505 2506 static void atl1c_shutdown(struct pci_dev *pdev) 2507 { 2508 struct net_device *netdev = pci_get_drvdata(pdev); 2509 struct atl1c_adapter *adapter = netdev_priv(netdev); 2510 2511 atl1c_suspend(&pdev->dev); 2512 pci_wake_from_d3(pdev, adapter->wol); 2513 pci_set_power_state(pdev, PCI_D3hot); 2514 } 2515 2516 static const struct net_device_ops atl1c_netdev_ops = { 2517 .ndo_open = atl1c_open, 2518 .ndo_stop = atl1c_close, 2519 .ndo_validate_addr = eth_validate_addr, 2520 .ndo_start_xmit = atl1c_xmit_frame, 2521 .ndo_set_mac_address = atl1c_set_mac_addr, 2522 .ndo_set_rx_mode = atl1c_set_multi, 2523 .ndo_change_mtu = atl1c_change_mtu, 2524 .ndo_fix_features = atl1c_fix_features, 2525 .ndo_set_features = atl1c_set_features, 2526 .ndo_do_ioctl = atl1c_ioctl, 2527 .ndo_tx_timeout = atl1c_tx_timeout, 2528 .ndo_get_stats = atl1c_get_stats, 2529 #ifdef CONFIG_NET_POLL_CONTROLLER 2530 .ndo_poll_controller = atl1c_netpoll, 2531 #endif 2532 }; 2533 2534 static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev) 2535 { 2536 SET_NETDEV_DEV(netdev, &pdev->dev); 2537 pci_set_drvdata(pdev, netdev); 2538 2539 netdev->netdev_ops = &atl1c_netdev_ops; 2540 netdev->watchdog_timeo = AT_TX_WATCHDOG; 2541 netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN); 2542 atl1c_set_ethtool_ops(netdev); 2543 2544 /* TODO: add when ready */ 2545 netdev->hw_features = NETIF_F_SG | 2546 NETIF_F_HW_CSUM | 2547 NETIF_F_HW_VLAN_CTAG_RX | 2548 NETIF_F_TSO | 2549 NETIF_F_TSO6; 2550 netdev->features = netdev->hw_features | 2551 NETIF_F_HW_VLAN_CTAG_TX; 2552 return 0; 2553 } 2554 2555 /** 2556 * atl1c_probe - Device Initialization Routine 2557 * @pdev: PCI device information struct 2558 * @ent: entry in atl1c_pci_tbl 2559 * 2560 * Returns 0 on success, negative on failure 2561 * 2562 * atl1c_probe initializes an adapter identified by a pci_dev structure. 2563 * The OS initialization, configuring of the adapter private structure, 2564 * and a hardware reset occur. 2565 */ 2566 static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2567 { 2568 struct net_device *netdev; 2569 struct atl1c_adapter *adapter; 2570 static int cards_found; 2571 2572 int err = 0; 2573 2574 /* enable device (incl. PCI PM wakeup and hotplug setup) */ 2575 err = pci_enable_device_mem(pdev); 2576 if (err) { 2577 dev_err(&pdev->dev, "cannot enable PCI device\n"); 2578 return err; 2579 } 2580 2581 /* 2582 * The atl1c chip can DMA to 64-bit addresses, but it uses a single 2583 * shared register for the high 32 bits, so only a single, aligned, 2584 * 4 GB physical address range can be used at a time. 2585 * 2586 * Supporting 64-bit DMA on this hardware is more trouble than it's 2587 * worth. It is far easier to limit to 32-bit DMA than update 2588 * various kernel subsystems to support the mechanics required by a 2589 * fixed-high-32-bit system. 2590 */ 2591 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 2592 if (err) { 2593 dev_err(&pdev->dev, "No usable DMA configuration,aborting\n"); 2594 goto err_dma; 2595 } 2596 2597 err = pci_request_regions(pdev, atl1c_driver_name); 2598 if (err) { 2599 dev_err(&pdev->dev, "cannot obtain PCI resources\n"); 2600 goto err_pci_reg; 2601 } 2602 2603 pci_set_master(pdev); 2604 2605 netdev = alloc_etherdev(sizeof(struct atl1c_adapter)); 2606 if (netdev == NULL) { 2607 err = -ENOMEM; 2608 goto err_alloc_etherdev; 2609 } 2610 2611 err = atl1c_init_netdev(netdev, pdev); 2612 if (err) { 2613 dev_err(&pdev->dev, "init netdevice failed\n"); 2614 goto err_init_netdev; 2615 } 2616 adapter = netdev_priv(netdev); 2617 adapter->bd_number = cards_found; 2618 adapter->netdev = netdev; 2619 adapter->pdev = pdev; 2620 adapter->hw.adapter = adapter; 2621 adapter->msg_enable = netif_msg_init(-1, atl1c_default_msg); 2622 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 2623 if (!adapter->hw.hw_addr) { 2624 err = -EIO; 2625 dev_err(&pdev->dev, "cannot map device registers\n"); 2626 goto err_ioremap; 2627 } 2628 2629 /* init mii data */ 2630 adapter->mii.dev = netdev; 2631 adapter->mii.mdio_read = atl1c_mdio_read; 2632 adapter->mii.mdio_write = atl1c_mdio_write; 2633 adapter->mii.phy_id_mask = 0x1f; 2634 adapter->mii.reg_num_mask = MDIO_CTRL_REG_MASK; 2635 dev_set_threaded(netdev, true); 2636 netif_napi_add(netdev, &adapter->napi, atl1c_clean, 64); 2637 netif_napi_add(netdev, &adapter->tx_napi, atl1c_clean_tx, 64); 2638 timer_setup(&adapter->phy_config_timer, atl1c_phy_config, 0); 2639 /* setup the private structure */ 2640 err = atl1c_sw_init(adapter); 2641 if (err) { 2642 dev_err(&pdev->dev, "net device private data init failed\n"); 2643 goto err_sw_init; 2644 } 2645 /* set max MTU */ 2646 atl1c_set_max_mtu(netdev); 2647 2648 atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); 2649 2650 /* Init GPHY as early as possible due to power saving issue */ 2651 atl1c_phy_reset(&adapter->hw); 2652 2653 err = atl1c_reset_mac(&adapter->hw); 2654 if (err) { 2655 err = -EIO; 2656 goto err_reset; 2657 } 2658 2659 /* reset the controller to 2660 * put the device in a known good starting state */ 2661 err = atl1c_phy_init(&adapter->hw); 2662 if (err) { 2663 err = -EIO; 2664 goto err_reset; 2665 } 2666 if (atl1c_read_mac_addr(&adapter->hw)) { 2667 /* got a random MAC address, set NET_ADDR_RANDOM to netdev */ 2668 netdev->addr_assign_type = NET_ADDR_RANDOM; 2669 } 2670 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len); 2671 if (netif_msg_probe(adapter)) 2672 dev_dbg(&pdev->dev, "mac address : %pM\n", 2673 adapter->hw.mac_addr); 2674 2675 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.mac_addr); 2676 INIT_WORK(&adapter->common_task, atl1c_common_task); 2677 adapter->work_event = 0; 2678 err = register_netdev(netdev); 2679 if (err) { 2680 dev_err(&pdev->dev, "register netdevice failed\n"); 2681 goto err_register; 2682 } 2683 2684 cards_found++; 2685 return 0; 2686 2687 err_reset: 2688 err_register: 2689 err_sw_init: 2690 iounmap(adapter->hw.hw_addr); 2691 err_init_netdev: 2692 err_ioremap: 2693 free_netdev(netdev); 2694 err_alloc_etherdev: 2695 pci_release_regions(pdev); 2696 err_pci_reg: 2697 err_dma: 2698 pci_disable_device(pdev); 2699 return err; 2700 } 2701 2702 /** 2703 * atl1c_remove - Device Removal Routine 2704 * @pdev: PCI device information struct 2705 * 2706 * atl1c_remove is called by the PCI subsystem to alert the driver 2707 * that it should release a PCI device. The could be caused by a 2708 * Hot-Plug event, or because the driver is going to be removed from 2709 * memory. 2710 */ 2711 static void atl1c_remove(struct pci_dev *pdev) 2712 { 2713 struct net_device *netdev = pci_get_drvdata(pdev); 2714 struct atl1c_adapter *adapter = netdev_priv(netdev); 2715 2716 unregister_netdev(netdev); 2717 /* restore permanent address */ 2718 atl1c_hw_set_mac_addr(&adapter->hw, adapter->hw.perm_mac_addr); 2719 atl1c_phy_disable(&adapter->hw); 2720 2721 iounmap(adapter->hw.hw_addr); 2722 2723 pci_release_regions(pdev); 2724 pci_disable_device(pdev); 2725 free_netdev(netdev); 2726 } 2727 2728 /** 2729 * atl1c_io_error_detected - called when PCI error is detected 2730 * @pdev: Pointer to PCI device 2731 * @state: The current pci connection state 2732 * 2733 * This function is called after a PCI bus error affecting 2734 * this device has been detected. 2735 */ 2736 static pci_ers_result_t atl1c_io_error_detected(struct pci_dev *pdev, 2737 pci_channel_state_t state) 2738 { 2739 struct net_device *netdev = pci_get_drvdata(pdev); 2740 struct atl1c_adapter *adapter = netdev_priv(netdev); 2741 2742 netif_device_detach(netdev); 2743 2744 if (state == pci_channel_io_perm_failure) 2745 return PCI_ERS_RESULT_DISCONNECT; 2746 2747 if (netif_running(netdev)) 2748 atl1c_down(adapter); 2749 2750 pci_disable_device(pdev); 2751 2752 /* Request a slot slot reset. */ 2753 return PCI_ERS_RESULT_NEED_RESET; 2754 } 2755 2756 /** 2757 * atl1c_io_slot_reset - called after the pci bus has been reset. 2758 * @pdev: Pointer to PCI device 2759 * 2760 * Restart the card from scratch, as if from a cold-boot. Implementation 2761 * resembles the first-half of the e1000_resume routine. 2762 */ 2763 static pci_ers_result_t atl1c_io_slot_reset(struct pci_dev *pdev) 2764 { 2765 struct net_device *netdev = pci_get_drvdata(pdev); 2766 struct atl1c_adapter *adapter = netdev_priv(netdev); 2767 2768 if (pci_enable_device(pdev)) { 2769 if (netif_msg_hw(adapter)) 2770 dev_err(&pdev->dev, 2771 "Cannot re-enable PCI device after reset\n"); 2772 return PCI_ERS_RESULT_DISCONNECT; 2773 } 2774 pci_set_master(pdev); 2775 2776 pci_enable_wake(pdev, PCI_D3hot, 0); 2777 pci_enable_wake(pdev, PCI_D3cold, 0); 2778 2779 atl1c_reset_mac(&adapter->hw); 2780 2781 return PCI_ERS_RESULT_RECOVERED; 2782 } 2783 2784 /** 2785 * atl1c_io_resume - called when traffic can start flowing again. 2786 * @pdev: Pointer to PCI device 2787 * 2788 * This callback is called when the error recovery driver tells us that 2789 * its OK to resume normal operation. Implementation resembles the 2790 * second-half of the atl1c_resume routine. 2791 */ 2792 static void atl1c_io_resume(struct pci_dev *pdev) 2793 { 2794 struct net_device *netdev = pci_get_drvdata(pdev); 2795 struct atl1c_adapter *adapter = netdev_priv(netdev); 2796 2797 if (netif_running(netdev)) { 2798 if (atl1c_up(adapter)) { 2799 if (netif_msg_hw(adapter)) 2800 dev_err(&pdev->dev, 2801 "Cannot bring device back up after reset\n"); 2802 return; 2803 } 2804 } 2805 2806 netif_device_attach(netdev); 2807 } 2808 2809 static const struct pci_error_handlers atl1c_err_handler = { 2810 .error_detected = atl1c_io_error_detected, 2811 .slot_reset = atl1c_io_slot_reset, 2812 .resume = atl1c_io_resume, 2813 }; 2814 2815 static SIMPLE_DEV_PM_OPS(atl1c_pm_ops, atl1c_suspend, atl1c_resume); 2816 2817 static struct pci_driver atl1c_driver = { 2818 .name = atl1c_driver_name, 2819 .id_table = atl1c_pci_tbl, 2820 .probe = atl1c_probe, 2821 .remove = atl1c_remove, 2822 .shutdown = atl1c_shutdown, 2823 .err_handler = &atl1c_err_handler, 2824 .driver.pm = &atl1c_pm_ops, 2825 }; 2826 2827 module_pci_driver(atl1c_driver); 2828