1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2015 - 2022 Beijing WangXun Technology Co., Ltd. */ 3 4 #include <linux/types.h> 5 #include <linux/module.h> 6 #include <linux/pci.h> 7 #include <linux/netdevice.h> 8 #include <linux/string.h> 9 #include <linux/etherdevice.h> 10 #include <net/ip.h> 11 #include <linux/if_vlan.h> 12 13 #include "../libwx/wx_type.h" 14 #include "../libwx/wx_lib.h" 15 #include "../libwx/wx_hw.h" 16 #include "txgbe_type.h" 17 #include "txgbe_hw.h" 18 #include "txgbe_ethtool.h" 19 20 char txgbe_driver_name[] = "txgbe"; 21 22 /* txgbe_pci_tbl - PCI Device ID Table 23 * 24 * Wildcard entries (PCI_ANY_ID) should come last 25 * Last entry must be all 0s 26 * 27 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, 28 * Class, Class Mask, private data (not used) } 29 */ 30 static const struct pci_device_id txgbe_pci_tbl[] = { 31 { PCI_VDEVICE(WANGXUN, TXGBE_DEV_ID_SP1000), 0}, 32 { PCI_VDEVICE(WANGXUN, TXGBE_DEV_ID_WX1820), 0}, 33 /* required last entry */ 34 { .device = 0 } 35 }; 36 37 #define DEFAULT_DEBUG_LEVEL_SHIFT 3 38 39 static void txgbe_check_minimum_link(struct wx *wx) 40 { 41 struct pci_dev *pdev; 42 43 pdev = wx->pdev; 44 pcie_print_link_status(pdev); 45 } 46 47 /** 48 * txgbe_enumerate_functions - Get the number of ports this device has 49 * @wx: wx structure 50 * 51 * This function enumerates the phsyical functions co-located on a single slot, 52 * in order to determine how many ports a device has. This is most useful in 53 * determining the required GT/s of PCIe bandwidth necessary for optimal 54 * performance. 55 **/ 56 static int txgbe_enumerate_functions(struct wx *wx) 57 { 58 struct pci_dev *entry, *pdev = wx->pdev; 59 int physfns = 0; 60 61 list_for_each_entry(entry, &pdev->bus->devices, bus_list) { 62 /* When the devices on the bus don't all match our device ID, 63 * we can't reliably determine the correct number of 64 * functions. This can occur if a function has been direct 65 * attached to a virtual machine using VT-d. 66 */ 67 if (entry->vendor != pdev->vendor || 68 entry->device != pdev->device) 69 return -EINVAL; 70 71 physfns++; 72 } 73 74 return physfns; 75 } 76 77 /** 78 * txgbe_irq_enable - Enable default interrupt generation settings 79 * @wx: pointer to private structure 80 * @queues: enable irqs for queues 81 **/ 82 static void txgbe_irq_enable(struct wx *wx, bool queues) 83 { 84 /* unmask interrupt */ 85 wx_intr_enable(wx, TXGBE_INTR_MISC(wx)); 86 if (queues) 87 wx_intr_enable(wx, TXGBE_INTR_QALL(wx)); 88 } 89 90 /** 91 * txgbe_intr - msi/legacy mode Interrupt Handler 92 * @irq: interrupt number 93 * @data: pointer to a network interface device structure 94 **/ 95 static irqreturn_t txgbe_intr(int __always_unused irq, void *data) 96 { 97 struct wx_q_vector *q_vector; 98 struct wx *wx = data; 99 struct pci_dev *pdev; 100 u32 eicr; 101 102 q_vector = wx->q_vector[0]; 103 pdev = wx->pdev; 104 105 eicr = wx_misc_isb(wx, WX_ISB_VEC0); 106 if (!eicr) { 107 /* shared interrupt alert! 108 * the interrupt that we masked before the ICR read. 109 */ 110 if (netif_running(wx->netdev)) 111 txgbe_irq_enable(wx, true); 112 return IRQ_NONE; /* Not our interrupt */ 113 } 114 wx->isb_mem[WX_ISB_VEC0] = 0; 115 if (!(pdev->msi_enabled)) 116 wr32(wx, WX_PX_INTA, 1); 117 118 wx->isb_mem[WX_ISB_MISC] = 0; 119 /* would disable interrupts here but it is auto disabled */ 120 napi_schedule_irqoff(&q_vector->napi); 121 122 /* re-enable link(maybe) and non-queue interrupts, no flush. 123 * txgbe_poll will re-enable the queue interrupts 124 */ 125 if (netif_running(wx->netdev)) 126 txgbe_irq_enable(wx, false); 127 128 return IRQ_HANDLED; 129 } 130 131 static irqreturn_t txgbe_msix_other(int __always_unused irq, void *data) 132 { 133 struct wx *wx = data; 134 135 /* re-enable the original interrupt state */ 136 if (netif_running(wx->netdev)) 137 txgbe_irq_enable(wx, false); 138 139 return IRQ_HANDLED; 140 } 141 142 /** 143 * txgbe_request_msix_irqs - Initialize MSI-X interrupts 144 * @wx: board private structure 145 * 146 * Allocate MSI-X vectors and request interrupts from the kernel. 147 **/ 148 static int txgbe_request_msix_irqs(struct wx *wx) 149 { 150 struct net_device *netdev = wx->netdev; 151 int vector, err; 152 153 for (vector = 0; vector < wx->num_q_vectors; vector++) { 154 struct wx_q_vector *q_vector = wx->q_vector[vector]; 155 struct msix_entry *entry = &wx->msix_entries[vector]; 156 157 if (q_vector->tx.ring && q_vector->rx.ring) 158 snprintf(q_vector->name, sizeof(q_vector->name) - 1, 159 "%s-TxRx-%d", netdev->name, entry->entry); 160 else 161 /* skip this unused q_vector */ 162 continue; 163 164 err = request_irq(entry->vector, wx_msix_clean_rings, 0, 165 q_vector->name, q_vector); 166 if (err) { 167 wx_err(wx, "request_irq failed for MSIX interrupt %s Error: %d\n", 168 q_vector->name, err); 169 goto free_queue_irqs; 170 } 171 } 172 173 err = request_irq(wx->msix_entries[vector].vector, 174 txgbe_msix_other, 0, netdev->name, wx); 175 if (err) { 176 wx_err(wx, "request_irq for msix_other failed: %d\n", err); 177 goto free_queue_irqs; 178 } 179 180 return 0; 181 182 free_queue_irqs: 183 while (vector) { 184 vector--; 185 free_irq(wx->msix_entries[vector].vector, 186 wx->q_vector[vector]); 187 } 188 wx_reset_interrupt_capability(wx); 189 return err; 190 } 191 192 /** 193 * txgbe_request_irq - initialize interrupts 194 * @wx: board private structure 195 * 196 * Attempt to configure interrupts using the best available 197 * capabilities of the hardware and kernel. 198 **/ 199 static int txgbe_request_irq(struct wx *wx) 200 { 201 struct net_device *netdev = wx->netdev; 202 struct pci_dev *pdev = wx->pdev; 203 int err; 204 205 if (pdev->msix_enabled) 206 err = txgbe_request_msix_irqs(wx); 207 else if (pdev->msi_enabled) 208 err = request_irq(wx->pdev->irq, &txgbe_intr, 0, 209 netdev->name, wx); 210 else 211 err = request_irq(wx->pdev->irq, &txgbe_intr, IRQF_SHARED, 212 netdev->name, wx); 213 214 if (err) 215 wx_err(wx, "request_irq failed, Error %d\n", err); 216 217 return err; 218 } 219 220 static void txgbe_up_complete(struct wx *wx) 221 { 222 u32 reg; 223 224 wx_control_hw(wx, true); 225 wx_configure_vectors(wx); 226 227 /* make sure to complete pre-operations */ 228 smp_mb__before_atomic(); 229 wx_napi_enable_all(wx); 230 231 /* clear any pending interrupts, may auto mask */ 232 rd32(wx, WX_PX_IC(0)); 233 rd32(wx, WX_PX_IC(1)); 234 rd32(wx, WX_PX_MISC_IC); 235 txgbe_irq_enable(wx, true); 236 237 /* Configure MAC Rx and Tx when link is up */ 238 reg = rd32(wx, WX_MAC_RX_CFG); 239 wr32(wx, WX_MAC_RX_CFG, reg); 240 wr32(wx, WX_MAC_PKT_FLT, WX_MAC_PKT_FLT_PR); 241 reg = rd32(wx, WX_MAC_WDG_TIMEOUT); 242 wr32(wx, WX_MAC_WDG_TIMEOUT, reg); 243 reg = rd32(wx, WX_MAC_TX_CFG); 244 wr32(wx, WX_MAC_TX_CFG, (reg & ~WX_MAC_TX_CFG_SPEED_MASK) | WX_MAC_TX_CFG_SPEED_10G); 245 246 /* enable transmits */ 247 netif_tx_start_all_queues(wx->netdev); 248 netif_carrier_on(wx->netdev); 249 } 250 251 static void txgbe_reset(struct wx *wx) 252 { 253 struct net_device *netdev = wx->netdev; 254 u8 old_addr[ETH_ALEN]; 255 int err; 256 257 err = txgbe_reset_hw(wx); 258 if (err != 0) 259 wx_err(wx, "Hardware Error: %d\n", err); 260 261 /* do not flush user set addresses */ 262 memcpy(old_addr, &wx->mac_table[0].addr, netdev->addr_len); 263 wx_flush_sw_mac_table(wx); 264 wx_mac_set_default_filter(wx, old_addr); 265 } 266 267 static void txgbe_disable_device(struct wx *wx) 268 { 269 struct net_device *netdev = wx->netdev; 270 u32 i; 271 272 wx_disable_pcie_master(wx); 273 /* disable receives */ 274 wx_disable_rx(wx); 275 276 /* disable all enabled rx queues */ 277 for (i = 0; i < wx->num_rx_queues; i++) 278 /* this call also flushes the previous write */ 279 wx_disable_rx_queue(wx, wx->rx_ring[i]); 280 281 netif_tx_stop_all_queues(netdev); 282 netif_carrier_off(netdev); 283 netif_tx_disable(netdev); 284 285 wx_irq_disable(wx); 286 wx_napi_disable_all(wx); 287 288 if (wx->bus.func < 2) 289 wr32m(wx, TXGBE_MIS_PRB_CTL, TXGBE_MIS_PRB_CTL_LAN_UP(wx->bus.func), 0); 290 else 291 wx_err(wx, "%s: invalid bus lan id %d\n", 292 __func__, wx->bus.func); 293 294 if (!(((wx->subsystem_device_id & WX_NCSI_MASK) == WX_NCSI_SUP) || 295 ((wx->subsystem_device_id & WX_WOL_MASK) == WX_WOL_SUP))) { 296 /* disable mac transmiter */ 297 wr32m(wx, WX_MAC_TX_CFG, WX_MAC_TX_CFG_TE, 0); 298 } 299 300 /* disable transmits in the hardware now that interrupts are off */ 301 for (i = 0; i < wx->num_tx_queues; i++) { 302 u8 reg_idx = wx->tx_ring[i]->reg_idx; 303 304 wr32(wx, WX_PX_TR_CFG(reg_idx), WX_PX_TR_CFG_SWFLSH); 305 } 306 307 /* Disable the Tx DMA engine */ 308 wr32m(wx, WX_TDM_CTL, WX_TDM_CTL_TE, 0); 309 } 310 311 static void txgbe_down(struct wx *wx) 312 { 313 txgbe_disable_device(wx); 314 txgbe_reset(wx); 315 316 wx_clean_all_tx_rings(wx); 317 wx_clean_all_rx_rings(wx); 318 } 319 320 /** 321 * txgbe_sw_init - Initialize general software structures (struct wx) 322 * @wx: board private structure to initialize 323 **/ 324 static int txgbe_sw_init(struct wx *wx) 325 { 326 u16 msix_count = 0; 327 int err; 328 329 wx->mac.num_rar_entries = TXGBE_SP_RAR_ENTRIES; 330 wx->mac.max_tx_queues = TXGBE_SP_MAX_TX_QUEUES; 331 wx->mac.max_rx_queues = TXGBE_SP_MAX_RX_QUEUES; 332 wx->mac.mcft_size = TXGBE_SP_MC_TBL_SIZE; 333 wx->mac.rx_pb_size = TXGBE_SP_RX_PB_SIZE; 334 wx->mac.tx_pb_size = TXGBE_SP_TDB_PB_SZ; 335 336 /* PCI config space info */ 337 err = wx_sw_init(wx); 338 if (err < 0) { 339 wx_err(wx, "read of internal subsystem device id failed\n"); 340 return err; 341 } 342 343 switch (wx->device_id) { 344 case TXGBE_DEV_ID_SP1000: 345 case TXGBE_DEV_ID_WX1820: 346 wx->mac.type = wx_mac_sp; 347 break; 348 default: 349 wx->mac.type = wx_mac_unknown; 350 break; 351 } 352 353 /* Set common capability flags and settings */ 354 wx->max_q_vectors = TXGBE_MAX_MSIX_VECTORS; 355 err = wx_get_pcie_msix_counts(wx, &msix_count, TXGBE_MAX_MSIX_VECTORS); 356 if (err) 357 wx_err(wx, "Do not support MSI-X\n"); 358 wx->mac.max_msix_vectors = msix_count; 359 360 /* enable itr by default in dynamic mode */ 361 wx->rx_itr_setting = 1; 362 wx->tx_itr_setting = 1; 363 364 /* set default ring sizes */ 365 wx->tx_ring_count = TXGBE_DEFAULT_TXD; 366 wx->rx_ring_count = TXGBE_DEFAULT_RXD; 367 368 /* set default work limits */ 369 wx->tx_work_limit = TXGBE_DEFAULT_TX_WORK; 370 wx->rx_work_limit = TXGBE_DEFAULT_RX_WORK; 371 372 return 0; 373 } 374 375 /** 376 * txgbe_open - Called when a network interface is made active 377 * @netdev: network interface device structure 378 * 379 * Returns 0 on success, negative value on failure 380 * 381 * The open entry point is called when a network interface is made 382 * active by the system (IFF_UP). 383 **/ 384 static int txgbe_open(struct net_device *netdev) 385 { 386 struct wx *wx = netdev_priv(netdev); 387 int err; 388 389 err = wx_setup_resources(wx); 390 if (err) 391 goto err_reset; 392 393 wx_configure(wx); 394 395 err = txgbe_request_irq(wx); 396 if (err) 397 goto err_free_isb; 398 399 /* Notify the stack of the actual queue counts. */ 400 err = netif_set_real_num_tx_queues(netdev, wx->num_tx_queues); 401 if (err) 402 goto err_free_irq; 403 404 err = netif_set_real_num_rx_queues(netdev, wx->num_rx_queues); 405 if (err) 406 goto err_free_irq; 407 408 txgbe_up_complete(wx); 409 410 return 0; 411 412 err_free_irq: 413 wx_free_irq(wx); 414 err_free_isb: 415 wx_free_isb_resources(wx); 416 err_reset: 417 txgbe_reset(wx); 418 419 return err; 420 } 421 422 /** 423 * txgbe_close_suspend - actions necessary to both suspend and close flows 424 * @wx: the private wx struct 425 * 426 * This function should contain the necessary work common to both suspending 427 * and closing of the device. 428 */ 429 static void txgbe_close_suspend(struct wx *wx) 430 { 431 txgbe_disable_device(wx); 432 wx_free_resources(wx); 433 } 434 435 /** 436 * txgbe_close - Disables a network interface 437 * @netdev: network interface device structure 438 * 439 * Returns 0, this is not allowed to fail 440 * 441 * The close entry point is called when an interface is de-activated 442 * by the OS. The hardware is still under the drivers control, but 443 * needs to be disabled. A global MAC reset is issued to stop the 444 * hardware, and all transmit and receive resources are freed. 445 **/ 446 static int txgbe_close(struct net_device *netdev) 447 { 448 struct wx *wx = netdev_priv(netdev); 449 450 txgbe_down(wx); 451 wx_free_irq(wx); 452 wx_free_resources(wx); 453 wx_control_hw(wx, false); 454 455 return 0; 456 } 457 458 static void txgbe_dev_shutdown(struct pci_dev *pdev, bool *enable_wake) 459 { 460 struct wx *wx = pci_get_drvdata(pdev); 461 struct net_device *netdev; 462 463 netdev = wx->netdev; 464 netif_device_detach(netdev); 465 466 rtnl_lock(); 467 if (netif_running(netdev)) 468 txgbe_close_suspend(wx); 469 rtnl_unlock(); 470 471 wx_control_hw(wx, false); 472 473 pci_disable_device(pdev); 474 } 475 476 static void txgbe_shutdown(struct pci_dev *pdev) 477 { 478 bool wake; 479 480 txgbe_dev_shutdown(pdev, &wake); 481 482 if (system_state == SYSTEM_POWER_OFF) { 483 pci_wake_from_d3(pdev, wake); 484 pci_set_power_state(pdev, PCI_D3hot); 485 } 486 } 487 488 static const struct net_device_ops txgbe_netdev_ops = { 489 .ndo_open = txgbe_open, 490 .ndo_stop = txgbe_close, 491 .ndo_change_mtu = wx_change_mtu, 492 .ndo_start_xmit = wx_xmit_frame, 493 .ndo_set_rx_mode = wx_set_rx_mode, 494 .ndo_validate_addr = eth_validate_addr, 495 .ndo_set_mac_address = wx_set_mac, 496 .ndo_get_stats64 = wx_get_stats64, 497 }; 498 499 /** 500 * txgbe_probe - Device Initialization Routine 501 * @pdev: PCI device information struct 502 * @ent: entry in txgbe_pci_tbl 503 * 504 * Returns 0 on success, negative on failure 505 * 506 * txgbe_probe initializes an adapter identified by a pci_dev structure. 507 * The OS initialization, configuring of the wx private structure, 508 * and a hardware reset occur. 509 **/ 510 static int txgbe_probe(struct pci_dev *pdev, 511 const struct pci_device_id __always_unused *ent) 512 { 513 struct net_device *netdev; 514 int err, expected_gts; 515 struct wx *wx = NULL; 516 517 u16 eeprom_verh = 0, eeprom_verl = 0, offset = 0; 518 u16 eeprom_cfg_blkh = 0, eeprom_cfg_blkl = 0; 519 u16 build = 0, major = 0, patch = 0; 520 u8 part_str[TXGBE_PBANUM_LENGTH]; 521 u32 etrack_id = 0; 522 523 err = pci_enable_device_mem(pdev); 524 if (err) 525 return err; 526 527 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 528 if (err) { 529 dev_err(&pdev->dev, 530 "No usable DMA configuration, aborting\n"); 531 goto err_pci_disable_dev; 532 } 533 534 err = pci_request_selected_regions(pdev, 535 pci_select_bars(pdev, IORESOURCE_MEM), 536 txgbe_driver_name); 537 if (err) { 538 dev_err(&pdev->dev, 539 "pci_request_selected_regions failed 0x%x\n", err); 540 goto err_pci_disable_dev; 541 } 542 543 pci_set_master(pdev); 544 545 netdev = devm_alloc_etherdev_mqs(&pdev->dev, 546 sizeof(struct wx), 547 TXGBE_MAX_TX_QUEUES, 548 TXGBE_MAX_RX_QUEUES); 549 if (!netdev) { 550 err = -ENOMEM; 551 goto err_pci_release_regions; 552 } 553 554 SET_NETDEV_DEV(netdev, &pdev->dev); 555 556 wx = netdev_priv(netdev); 557 wx->netdev = netdev; 558 wx->pdev = pdev; 559 560 wx->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1; 561 562 wx->hw_addr = devm_ioremap(&pdev->dev, 563 pci_resource_start(pdev, 0), 564 pci_resource_len(pdev, 0)); 565 if (!wx->hw_addr) { 566 err = -EIO; 567 goto err_pci_release_regions; 568 } 569 570 wx->driver_name = txgbe_driver_name; 571 txgbe_set_ethtool_ops(netdev); 572 netdev->netdev_ops = &txgbe_netdev_ops; 573 574 /* setup the private structure */ 575 err = txgbe_sw_init(wx); 576 if (err) 577 goto err_free_mac_table; 578 579 /* check if flash load is done after hw power up */ 580 err = wx_check_flash_load(wx, TXGBE_SPI_ILDR_STATUS_PERST); 581 if (err) 582 goto err_free_mac_table; 583 err = wx_check_flash_load(wx, TXGBE_SPI_ILDR_STATUS_PWRRST); 584 if (err) 585 goto err_free_mac_table; 586 587 err = wx_mng_present(wx); 588 if (err) { 589 dev_err(&pdev->dev, "Management capability is not present\n"); 590 goto err_free_mac_table; 591 } 592 593 err = txgbe_reset_hw(wx); 594 if (err) { 595 dev_err(&pdev->dev, "HW Init failed: %d\n", err); 596 goto err_free_mac_table; 597 } 598 599 netdev->features |= NETIF_F_HIGHDMA; 600 netdev->features = NETIF_F_SG; 601 602 /* copy netdev features into list of user selectable features */ 603 netdev->hw_features |= netdev->features | NETIF_F_RXALL; 604 605 netdev->priv_flags |= IFF_UNICAST_FLT; 606 netdev->priv_flags |= IFF_SUPP_NOFCS; 607 608 netdev->min_mtu = ETH_MIN_MTU; 609 netdev->max_mtu = WX_MAX_JUMBO_FRAME_SIZE - 610 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); 611 612 /* make sure the EEPROM is good */ 613 err = txgbe_validate_eeprom_checksum(wx, NULL); 614 if (err != 0) { 615 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n"); 616 wr32(wx, WX_MIS_RST, WX_MIS_RST_SW_RST); 617 err = -EIO; 618 goto err_free_mac_table; 619 } 620 621 eth_hw_addr_set(netdev, wx->mac.perm_addr); 622 wx_mac_set_default_filter(wx, wx->mac.perm_addr); 623 624 err = wx_init_interrupt_scheme(wx); 625 if (err) 626 goto err_free_mac_table; 627 628 /* Save off EEPROM version number and Option Rom version which 629 * together make a unique identify for the eeprom 630 */ 631 wx_read_ee_hostif(wx, 632 wx->eeprom.sw_region_offset + TXGBE_EEPROM_VERSION_H, 633 &eeprom_verh); 634 wx_read_ee_hostif(wx, 635 wx->eeprom.sw_region_offset + TXGBE_EEPROM_VERSION_L, 636 &eeprom_verl); 637 etrack_id = (eeprom_verh << 16) | eeprom_verl; 638 639 wx_read_ee_hostif(wx, 640 wx->eeprom.sw_region_offset + TXGBE_ISCSI_BOOT_CONFIG, 641 &offset); 642 643 /* Make sure offset to SCSI block is valid */ 644 if (!(offset == 0x0) && !(offset == 0xffff)) { 645 wx_read_ee_hostif(wx, offset + 0x84, &eeprom_cfg_blkh); 646 wx_read_ee_hostif(wx, offset + 0x83, &eeprom_cfg_blkl); 647 648 /* Only display Option Rom if exist */ 649 if (eeprom_cfg_blkl && eeprom_cfg_blkh) { 650 major = eeprom_cfg_blkl >> 8; 651 build = (eeprom_cfg_blkl << 8) | (eeprom_cfg_blkh >> 8); 652 patch = eeprom_cfg_blkh & 0x00ff; 653 654 snprintf(wx->eeprom_id, sizeof(wx->eeprom_id), 655 "0x%08x, %d.%d.%d", etrack_id, major, build, 656 patch); 657 } else { 658 snprintf(wx->eeprom_id, sizeof(wx->eeprom_id), 659 "0x%08x", etrack_id); 660 } 661 } else { 662 snprintf(wx->eeprom_id, sizeof(wx->eeprom_id), 663 "0x%08x", etrack_id); 664 } 665 666 err = register_netdev(netdev); 667 if (err) 668 goto err_release_hw; 669 670 pci_set_drvdata(pdev, wx); 671 672 netif_tx_stop_all_queues(netdev); 673 674 /* calculate the expected PCIe bandwidth required for optimal 675 * performance. Note that some older parts will never have enough 676 * bandwidth due to being older generation PCIe parts. We clamp these 677 * parts to ensure that no warning is displayed, as this could confuse 678 * users otherwise. 679 */ 680 expected_gts = txgbe_enumerate_functions(wx) * 10; 681 682 /* don't check link if we failed to enumerate functions */ 683 if (expected_gts > 0) 684 txgbe_check_minimum_link(wx); 685 else 686 dev_warn(&pdev->dev, "Failed to enumerate PF devices.\n"); 687 688 /* First try to read PBA as a string */ 689 err = txgbe_read_pba_string(wx, part_str, TXGBE_PBANUM_LENGTH); 690 if (err) 691 strncpy(part_str, "Unknown", TXGBE_PBANUM_LENGTH); 692 693 netif_info(wx, probe, netdev, "%pM\n", netdev->dev_addr); 694 695 return 0; 696 697 err_release_hw: 698 wx_clear_interrupt_scheme(wx); 699 wx_control_hw(wx, false); 700 err_free_mac_table: 701 kfree(wx->mac_table); 702 err_pci_release_regions: 703 pci_release_selected_regions(pdev, 704 pci_select_bars(pdev, IORESOURCE_MEM)); 705 err_pci_disable_dev: 706 pci_disable_device(pdev); 707 return err; 708 } 709 710 /** 711 * txgbe_remove - Device Removal Routine 712 * @pdev: PCI device information struct 713 * 714 * txgbe_remove is called by the PCI subsystem to alert the driver 715 * that it should release a PCI device. The could be caused by a 716 * Hot-Plug event, or because the driver is going to be removed from 717 * memory. 718 **/ 719 static void txgbe_remove(struct pci_dev *pdev) 720 { 721 struct wx *wx = pci_get_drvdata(pdev); 722 struct net_device *netdev; 723 724 netdev = wx->netdev; 725 unregister_netdev(netdev); 726 727 pci_release_selected_regions(pdev, 728 pci_select_bars(pdev, IORESOURCE_MEM)); 729 730 kfree(wx->mac_table); 731 wx_clear_interrupt_scheme(wx); 732 733 pci_disable_device(pdev); 734 } 735 736 static struct pci_driver txgbe_driver = { 737 .name = txgbe_driver_name, 738 .id_table = txgbe_pci_tbl, 739 .probe = txgbe_probe, 740 .remove = txgbe_remove, 741 .shutdown = txgbe_shutdown, 742 }; 743 744 module_pci_driver(txgbe_driver); 745 746 MODULE_DEVICE_TABLE(pci, txgbe_pci_tbl); 747 MODULE_AUTHOR("Beijing WangXun Technology Co., Ltd, <software@trustnetic.com>"); 748 MODULE_DESCRIPTION("WangXun(R) 10 Gigabit PCI Express Network Driver"); 749 MODULE_LICENSE("GPL"); 750