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 <linux/phylink.h> 11 #include <net/ip.h> 12 #include <linux/if_vlan.h> 13 14 #include "../libwx/wx_type.h" 15 #include "../libwx/wx_lib.h" 16 #include "../libwx/wx_hw.h" 17 #include "txgbe_type.h" 18 #include "txgbe_hw.h" 19 #include "txgbe_phy.h" 20 #include "txgbe_ethtool.h" 21 22 char txgbe_driver_name[] = "txgbe"; 23 24 /* txgbe_pci_tbl - PCI Device ID Table 25 * 26 * Wildcard entries (PCI_ANY_ID) should come last 27 * Last entry must be all 0s 28 * 29 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, 30 * Class, Class Mask, private data (not used) } 31 */ 32 static const struct pci_device_id txgbe_pci_tbl[] = { 33 { PCI_VDEVICE(WANGXUN, TXGBE_DEV_ID_SP1000), 0}, 34 { PCI_VDEVICE(WANGXUN, TXGBE_DEV_ID_WX1820), 0}, 35 /* required last entry */ 36 { .device = 0 } 37 }; 38 39 #define DEFAULT_DEBUG_LEVEL_SHIFT 3 40 41 static void txgbe_check_minimum_link(struct wx *wx) 42 { 43 struct pci_dev *pdev; 44 45 pdev = wx->pdev; 46 pcie_print_link_status(pdev); 47 } 48 49 /** 50 * txgbe_enumerate_functions - Get the number of ports this device has 51 * @wx: wx structure 52 * 53 * This function enumerates the phsyical functions co-located on a single slot, 54 * in order to determine how many ports a device has. This is most useful in 55 * determining the required GT/s of PCIe bandwidth necessary for optimal 56 * performance. 57 **/ 58 static int txgbe_enumerate_functions(struct wx *wx) 59 { 60 struct pci_dev *entry, *pdev = wx->pdev; 61 int physfns = 0; 62 63 list_for_each_entry(entry, &pdev->bus->devices, bus_list) { 64 /* When the devices on the bus don't all match our device ID, 65 * we can't reliably determine the correct number of 66 * functions. This can occur if a function has been direct 67 * attached to a virtual machine using VT-d. 68 */ 69 if (entry->vendor != pdev->vendor || 70 entry->device != pdev->device) 71 return -EINVAL; 72 73 physfns++; 74 } 75 76 return physfns; 77 } 78 79 /** 80 * txgbe_irq_enable - Enable default interrupt generation settings 81 * @wx: pointer to private structure 82 * @queues: enable irqs for queues 83 **/ 84 static void txgbe_irq_enable(struct wx *wx, bool queues) 85 { 86 wr32(wx, WX_PX_MISC_IEN, TXGBE_PX_MISC_IEN_MASK); 87 88 /* unmask interrupt */ 89 wx_intr_enable(wx, TXGBE_INTR_MISC(wx)); 90 if (queues) 91 wx_intr_enable(wx, TXGBE_INTR_QALL(wx)); 92 } 93 94 /** 95 * txgbe_intr - msi/legacy mode Interrupt Handler 96 * @irq: interrupt number 97 * @data: pointer to a network interface device structure 98 **/ 99 static irqreturn_t txgbe_intr(int __always_unused irq, void *data) 100 { 101 struct wx_q_vector *q_vector; 102 struct wx *wx = data; 103 struct pci_dev *pdev; 104 u32 eicr; 105 106 q_vector = wx->q_vector[0]; 107 pdev = wx->pdev; 108 109 eicr = wx_misc_isb(wx, WX_ISB_VEC0); 110 if (!eicr) { 111 /* shared interrupt alert! 112 * the interrupt that we masked before the ICR read. 113 */ 114 if (netif_running(wx->netdev)) 115 txgbe_irq_enable(wx, true); 116 return IRQ_NONE; /* Not our interrupt */ 117 } 118 wx->isb_mem[WX_ISB_VEC0] = 0; 119 if (!(pdev->msi_enabled)) 120 wr32(wx, WX_PX_INTA, 1); 121 122 wx->isb_mem[WX_ISB_MISC] = 0; 123 /* would disable interrupts here but it is auto disabled */ 124 napi_schedule_irqoff(&q_vector->napi); 125 126 /* re-enable link(maybe) and non-queue interrupts, no flush. 127 * txgbe_poll will re-enable the queue interrupts 128 */ 129 if (netif_running(wx->netdev)) 130 txgbe_irq_enable(wx, false); 131 132 return IRQ_HANDLED; 133 } 134 135 /** 136 * txgbe_request_msix_irqs - Initialize MSI-X interrupts 137 * @wx: board private structure 138 * 139 * Allocate MSI-X vectors and request interrupts from the kernel. 140 **/ 141 static int txgbe_request_msix_irqs(struct wx *wx) 142 { 143 struct net_device *netdev = wx->netdev; 144 int vector, err; 145 146 for (vector = 0; vector < wx->num_q_vectors; vector++) { 147 struct wx_q_vector *q_vector = wx->q_vector[vector]; 148 struct msix_entry *entry = &wx->msix_entries[vector]; 149 150 if (q_vector->tx.ring && q_vector->rx.ring) 151 snprintf(q_vector->name, sizeof(q_vector->name) - 1, 152 "%s-TxRx-%d", netdev->name, entry->entry); 153 else 154 /* skip this unused q_vector */ 155 continue; 156 157 err = request_irq(entry->vector, wx_msix_clean_rings, 0, 158 q_vector->name, q_vector); 159 if (err) { 160 wx_err(wx, "request_irq failed for MSIX interrupt %s Error: %d\n", 161 q_vector->name, err); 162 goto free_queue_irqs; 163 } 164 } 165 166 return 0; 167 168 free_queue_irqs: 169 while (vector) { 170 vector--; 171 free_irq(wx->msix_entries[vector].vector, 172 wx->q_vector[vector]); 173 } 174 wx_reset_interrupt_capability(wx); 175 return err; 176 } 177 178 /** 179 * txgbe_request_irq - initialize interrupts 180 * @wx: board private structure 181 * 182 * Attempt to configure interrupts using the best available 183 * capabilities of the hardware and kernel. 184 **/ 185 static int txgbe_request_irq(struct wx *wx) 186 { 187 struct net_device *netdev = wx->netdev; 188 struct pci_dev *pdev = wx->pdev; 189 int err; 190 191 if (pdev->msix_enabled) 192 err = txgbe_request_msix_irqs(wx); 193 else if (pdev->msi_enabled) 194 err = request_irq(wx->pdev->irq, &txgbe_intr, 0, 195 netdev->name, wx); 196 else 197 err = request_irq(wx->pdev->irq, &txgbe_intr, IRQF_SHARED, 198 netdev->name, wx); 199 200 if (err) 201 wx_err(wx, "request_irq failed, Error %d\n", err); 202 203 return err; 204 } 205 206 static void txgbe_up_complete(struct wx *wx) 207 { 208 struct net_device *netdev = wx->netdev; 209 struct txgbe *txgbe; 210 211 wx_control_hw(wx, true); 212 wx_configure_vectors(wx); 213 214 /* make sure to complete pre-operations */ 215 smp_mb__before_atomic(); 216 wx_napi_enable_all(wx); 217 218 txgbe = netdev_to_txgbe(netdev); 219 phylink_start(txgbe->phylink); 220 221 /* clear any pending interrupts, may auto mask */ 222 rd32(wx, WX_PX_IC(0)); 223 rd32(wx, WX_PX_IC(1)); 224 rd32(wx, WX_PX_MISC_IC); 225 txgbe_irq_enable(wx, true); 226 227 /* enable transmits */ 228 netif_tx_start_all_queues(netdev); 229 } 230 231 static void txgbe_reset(struct wx *wx) 232 { 233 struct net_device *netdev = wx->netdev; 234 u8 old_addr[ETH_ALEN]; 235 int err; 236 237 err = txgbe_reset_hw(wx); 238 if (err != 0) 239 wx_err(wx, "Hardware Error: %d\n", err); 240 241 wx_start_hw(wx); 242 /* do not flush user set addresses */ 243 memcpy(old_addr, &wx->mac_table[0].addr, netdev->addr_len); 244 wx_flush_sw_mac_table(wx); 245 wx_mac_set_default_filter(wx, old_addr); 246 } 247 248 static void txgbe_disable_device(struct wx *wx) 249 { 250 struct net_device *netdev = wx->netdev; 251 u32 i; 252 253 wx_disable_pcie_master(wx); 254 /* disable receives */ 255 wx_disable_rx(wx); 256 257 /* disable all enabled rx queues */ 258 for (i = 0; i < wx->num_rx_queues; i++) 259 /* this call also flushes the previous write */ 260 wx_disable_rx_queue(wx, wx->rx_ring[i]); 261 262 netif_tx_stop_all_queues(netdev); 263 netif_tx_disable(netdev); 264 265 wx_irq_disable(wx); 266 wx_napi_disable_all(wx); 267 268 if (wx->bus.func < 2) 269 wr32m(wx, TXGBE_MIS_PRB_CTL, TXGBE_MIS_PRB_CTL_LAN_UP(wx->bus.func), 0); 270 else 271 wx_err(wx, "%s: invalid bus lan id %d\n", 272 __func__, wx->bus.func); 273 274 if (!(((wx->subsystem_device_id & WX_NCSI_MASK) == WX_NCSI_SUP) || 275 ((wx->subsystem_device_id & WX_WOL_MASK) == WX_WOL_SUP))) { 276 /* disable mac transmiter */ 277 wr32m(wx, WX_MAC_TX_CFG, WX_MAC_TX_CFG_TE, 0); 278 } 279 280 /* disable transmits in the hardware now that interrupts are off */ 281 for (i = 0; i < wx->num_tx_queues; i++) { 282 u8 reg_idx = wx->tx_ring[i]->reg_idx; 283 284 wr32(wx, WX_PX_TR_CFG(reg_idx), WX_PX_TR_CFG_SWFLSH); 285 } 286 287 /* Disable the Tx DMA engine */ 288 wr32m(wx, WX_TDM_CTL, WX_TDM_CTL_TE, 0); 289 } 290 291 static void txgbe_down(struct wx *wx) 292 { 293 struct txgbe *txgbe = netdev_to_txgbe(wx->netdev); 294 295 txgbe_disable_device(wx); 296 txgbe_reset(wx); 297 phylink_stop(txgbe->phylink); 298 299 wx_clean_all_tx_rings(wx); 300 wx_clean_all_rx_rings(wx); 301 } 302 303 /** 304 * txgbe_sw_init - Initialize general software structures (struct wx) 305 * @wx: board private structure to initialize 306 **/ 307 static int txgbe_sw_init(struct wx *wx) 308 { 309 u16 msix_count = 0; 310 int err; 311 312 wx->mac.num_rar_entries = TXGBE_SP_RAR_ENTRIES; 313 wx->mac.max_tx_queues = TXGBE_SP_MAX_TX_QUEUES; 314 wx->mac.max_rx_queues = TXGBE_SP_MAX_RX_QUEUES; 315 wx->mac.mcft_size = TXGBE_SP_MC_TBL_SIZE; 316 wx->mac.vft_size = TXGBE_SP_VFT_TBL_SIZE; 317 wx->mac.rx_pb_size = TXGBE_SP_RX_PB_SIZE; 318 wx->mac.tx_pb_size = TXGBE_SP_TDB_PB_SZ; 319 320 /* PCI config space info */ 321 err = wx_sw_init(wx); 322 if (err < 0) { 323 wx_err(wx, "read of internal subsystem device id failed\n"); 324 return err; 325 } 326 327 switch (wx->device_id) { 328 case TXGBE_DEV_ID_SP1000: 329 case TXGBE_DEV_ID_WX1820: 330 wx->mac.type = wx_mac_sp; 331 break; 332 default: 333 wx->mac.type = wx_mac_unknown; 334 break; 335 } 336 337 /* Set common capability flags and settings */ 338 wx->max_q_vectors = TXGBE_MAX_MSIX_VECTORS; 339 err = wx_get_pcie_msix_counts(wx, &msix_count, TXGBE_MAX_MSIX_VECTORS); 340 if (err) 341 wx_err(wx, "Do not support MSI-X\n"); 342 wx->mac.max_msix_vectors = msix_count; 343 344 /* enable itr by default in dynamic mode */ 345 wx->rx_itr_setting = 1; 346 wx->tx_itr_setting = 1; 347 348 /* set default ring sizes */ 349 wx->tx_ring_count = TXGBE_DEFAULT_TXD; 350 wx->rx_ring_count = TXGBE_DEFAULT_RXD; 351 352 /* set default work limits */ 353 wx->tx_work_limit = TXGBE_DEFAULT_TX_WORK; 354 wx->rx_work_limit = TXGBE_DEFAULT_RX_WORK; 355 356 return 0; 357 } 358 359 /** 360 * txgbe_open - Called when a network interface is made active 361 * @netdev: network interface device structure 362 * 363 * Returns 0 on success, negative value on failure 364 * 365 * The open entry point is called when a network interface is made 366 * active by the system (IFF_UP). 367 **/ 368 static int txgbe_open(struct net_device *netdev) 369 { 370 struct wx *wx = netdev_priv(netdev); 371 int err; 372 373 err = wx_setup_resources(wx); 374 if (err) 375 goto err_reset; 376 377 wx_configure(wx); 378 379 err = txgbe_request_irq(wx); 380 if (err) 381 goto err_free_isb; 382 383 /* Notify the stack of the actual queue counts. */ 384 err = netif_set_real_num_tx_queues(netdev, wx->num_tx_queues); 385 if (err) 386 goto err_free_irq; 387 388 err = netif_set_real_num_rx_queues(netdev, wx->num_rx_queues); 389 if (err) 390 goto err_free_irq; 391 392 txgbe_up_complete(wx); 393 394 return 0; 395 396 err_free_irq: 397 wx_free_irq(wx); 398 err_free_isb: 399 wx_free_isb_resources(wx); 400 err_reset: 401 txgbe_reset(wx); 402 403 return err; 404 } 405 406 /** 407 * txgbe_close_suspend - actions necessary to both suspend and close flows 408 * @wx: the private wx struct 409 * 410 * This function should contain the necessary work common to both suspending 411 * and closing of the device. 412 */ 413 static void txgbe_close_suspend(struct wx *wx) 414 { 415 txgbe_disable_device(wx); 416 wx_free_resources(wx); 417 } 418 419 /** 420 * txgbe_close - Disables a network interface 421 * @netdev: network interface device structure 422 * 423 * Returns 0, this is not allowed to fail 424 * 425 * The close entry point is called when an interface is de-activated 426 * by the OS. The hardware is still under the drivers control, but 427 * needs to be disabled. A global MAC reset is issued to stop the 428 * hardware, and all transmit and receive resources are freed. 429 **/ 430 static int txgbe_close(struct net_device *netdev) 431 { 432 struct wx *wx = netdev_priv(netdev); 433 434 txgbe_down(wx); 435 wx_free_irq(wx); 436 wx_free_resources(wx); 437 wx_control_hw(wx, false); 438 439 return 0; 440 } 441 442 static void txgbe_dev_shutdown(struct pci_dev *pdev) 443 { 444 struct wx *wx = pci_get_drvdata(pdev); 445 struct net_device *netdev; 446 447 netdev = wx->netdev; 448 netif_device_detach(netdev); 449 450 rtnl_lock(); 451 if (netif_running(netdev)) 452 txgbe_close_suspend(wx); 453 rtnl_unlock(); 454 455 wx_control_hw(wx, false); 456 457 pci_disable_device(pdev); 458 } 459 460 static void txgbe_shutdown(struct pci_dev *pdev) 461 { 462 txgbe_dev_shutdown(pdev); 463 464 if (system_state == SYSTEM_POWER_OFF) { 465 pci_wake_from_d3(pdev, false); 466 pci_set_power_state(pdev, PCI_D3hot); 467 } 468 } 469 470 static const struct net_device_ops txgbe_netdev_ops = { 471 .ndo_open = txgbe_open, 472 .ndo_stop = txgbe_close, 473 .ndo_change_mtu = wx_change_mtu, 474 .ndo_start_xmit = wx_xmit_frame, 475 .ndo_set_rx_mode = wx_set_rx_mode, 476 .ndo_set_features = wx_set_features, 477 .ndo_validate_addr = eth_validate_addr, 478 .ndo_set_mac_address = wx_set_mac, 479 .ndo_get_stats64 = wx_get_stats64, 480 .ndo_vlan_rx_add_vid = wx_vlan_rx_add_vid, 481 .ndo_vlan_rx_kill_vid = wx_vlan_rx_kill_vid, 482 }; 483 484 /** 485 * txgbe_probe - Device Initialization Routine 486 * @pdev: PCI device information struct 487 * @ent: entry in txgbe_pci_tbl 488 * 489 * Returns 0 on success, negative on failure 490 * 491 * txgbe_probe initializes an adapter identified by a pci_dev structure. 492 * The OS initialization, configuring of the wx private structure, 493 * and a hardware reset occur. 494 **/ 495 static int txgbe_probe(struct pci_dev *pdev, 496 const struct pci_device_id __always_unused *ent) 497 { 498 struct net_device *netdev; 499 int err, expected_gts; 500 struct wx *wx = NULL; 501 struct txgbe *txgbe; 502 503 u16 eeprom_verh = 0, eeprom_verl = 0, offset = 0; 504 u16 eeprom_cfg_blkh = 0, eeprom_cfg_blkl = 0; 505 u16 build = 0, major = 0, patch = 0; 506 u8 part_str[TXGBE_PBANUM_LENGTH]; 507 u32 etrack_id = 0; 508 509 err = pci_enable_device_mem(pdev); 510 if (err) 511 return err; 512 513 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 514 if (err) { 515 dev_err(&pdev->dev, 516 "No usable DMA configuration, aborting\n"); 517 goto err_pci_disable_dev; 518 } 519 520 err = pci_request_selected_regions(pdev, 521 pci_select_bars(pdev, IORESOURCE_MEM), 522 txgbe_driver_name); 523 if (err) { 524 dev_err(&pdev->dev, 525 "pci_request_selected_regions failed 0x%x\n", err); 526 goto err_pci_disable_dev; 527 } 528 529 pci_set_master(pdev); 530 531 netdev = devm_alloc_etherdev_mqs(&pdev->dev, 532 sizeof(struct wx), 533 TXGBE_MAX_TX_QUEUES, 534 TXGBE_MAX_RX_QUEUES); 535 if (!netdev) { 536 err = -ENOMEM; 537 goto err_pci_release_regions; 538 } 539 540 SET_NETDEV_DEV(netdev, &pdev->dev); 541 542 wx = netdev_priv(netdev); 543 wx->netdev = netdev; 544 wx->pdev = pdev; 545 546 wx->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1; 547 548 wx->hw_addr = devm_ioremap(&pdev->dev, 549 pci_resource_start(pdev, 0), 550 pci_resource_len(pdev, 0)); 551 if (!wx->hw_addr) { 552 err = -EIO; 553 goto err_pci_release_regions; 554 } 555 556 wx->driver_name = txgbe_driver_name; 557 txgbe_set_ethtool_ops(netdev); 558 netdev->netdev_ops = &txgbe_netdev_ops; 559 560 /* setup the private structure */ 561 err = txgbe_sw_init(wx); 562 if (err) 563 goto err_free_mac_table; 564 565 /* check if flash load is done after hw power up */ 566 err = wx_check_flash_load(wx, TXGBE_SPI_ILDR_STATUS_PERST); 567 if (err) 568 goto err_free_mac_table; 569 err = wx_check_flash_load(wx, TXGBE_SPI_ILDR_STATUS_PWRRST); 570 if (err) 571 goto err_free_mac_table; 572 573 err = wx_mng_present(wx); 574 if (err) { 575 dev_err(&pdev->dev, "Management capability is not present\n"); 576 goto err_free_mac_table; 577 } 578 579 err = txgbe_reset_hw(wx); 580 if (err) { 581 dev_err(&pdev->dev, "HW Init failed: %d\n", err); 582 goto err_free_mac_table; 583 } 584 585 netdev->features = NETIF_F_SG | 586 NETIF_F_TSO | 587 NETIF_F_TSO6 | 588 NETIF_F_RXHASH | 589 NETIF_F_RXCSUM | 590 NETIF_F_HW_CSUM; 591 592 netdev->gso_partial_features = NETIF_F_GSO_ENCAP_ALL; 593 netdev->features |= netdev->gso_partial_features; 594 netdev->features |= NETIF_F_SCTP_CRC; 595 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID; 596 netdev->hw_enc_features |= netdev->vlan_features; 597 netdev->features |= NETIF_F_VLAN_FEATURES; 598 /* copy netdev features into list of user selectable features */ 599 netdev->hw_features |= netdev->features | NETIF_F_RXALL; 600 netdev->hw_features |= NETIF_F_NTUPLE | NETIF_F_HW_TC; 601 netdev->features |= NETIF_F_HIGHDMA; 602 netdev->hw_features |= NETIF_F_GRO; 603 netdev->features |= NETIF_F_GRO; 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 txgbe = devm_kzalloc(&pdev->dev, sizeof(*txgbe), GFP_KERNEL); 667 if (!txgbe) { 668 err = -ENOMEM; 669 goto err_release_hw; 670 } 671 672 txgbe->wx = wx; 673 wx->priv = txgbe; 674 675 err = txgbe_init_phy(txgbe); 676 if (err) 677 goto err_release_hw; 678 679 err = register_netdev(netdev); 680 if (err) 681 goto err_remove_phy; 682 683 pci_set_drvdata(pdev, wx); 684 685 netif_tx_stop_all_queues(netdev); 686 687 /* calculate the expected PCIe bandwidth required for optimal 688 * performance. Note that some older parts will never have enough 689 * bandwidth due to being older generation PCIe parts. We clamp these 690 * parts to ensure that no warning is displayed, as this could confuse 691 * users otherwise. 692 */ 693 expected_gts = txgbe_enumerate_functions(wx) * 10; 694 695 /* don't check link if we failed to enumerate functions */ 696 if (expected_gts > 0) 697 txgbe_check_minimum_link(wx); 698 else 699 dev_warn(&pdev->dev, "Failed to enumerate PF devices.\n"); 700 701 /* First try to read PBA as a string */ 702 err = txgbe_read_pba_string(wx, part_str, TXGBE_PBANUM_LENGTH); 703 if (err) 704 strncpy(part_str, "Unknown", TXGBE_PBANUM_LENGTH); 705 706 netif_info(wx, probe, netdev, "%pM\n", netdev->dev_addr); 707 708 return 0; 709 710 err_remove_phy: 711 txgbe_remove_phy(txgbe); 712 err_release_hw: 713 wx_clear_interrupt_scheme(wx); 714 wx_control_hw(wx, false); 715 err_free_mac_table: 716 kfree(wx->mac_table); 717 err_pci_release_regions: 718 pci_release_selected_regions(pdev, 719 pci_select_bars(pdev, IORESOURCE_MEM)); 720 err_pci_disable_dev: 721 pci_disable_device(pdev); 722 return err; 723 } 724 725 /** 726 * txgbe_remove - Device Removal Routine 727 * @pdev: PCI device information struct 728 * 729 * txgbe_remove is called by the PCI subsystem to alert the driver 730 * that it should release a PCI device. The could be caused by a 731 * Hot-Plug event, or because the driver is going to be removed from 732 * memory. 733 **/ 734 static void txgbe_remove(struct pci_dev *pdev) 735 { 736 struct wx *wx = pci_get_drvdata(pdev); 737 struct txgbe *txgbe = wx->priv; 738 struct net_device *netdev; 739 740 netdev = wx->netdev; 741 unregister_netdev(netdev); 742 743 txgbe_remove_phy(txgbe); 744 745 pci_release_selected_regions(pdev, 746 pci_select_bars(pdev, IORESOURCE_MEM)); 747 748 kfree(wx->mac_table); 749 wx_clear_interrupt_scheme(wx); 750 751 pci_disable_device(pdev); 752 } 753 754 static struct pci_driver txgbe_driver = { 755 .name = txgbe_driver_name, 756 .id_table = txgbe_pci_tbl, 757 .probe = txgbe_probe, 758 .remove = txgbe_remove, 759 .shutdown = txgbe_shutdown, 760 }; 761 762 module_pci_driver(txgbe_driver); 763 764 MODULE_DEVICE_TABLE(pci, txgbe_pci_tbl); 765 MODULE_AUTHOR("Beijing WangXun Technology Co., Ltd, <software@trustnetic.com>"); 766 MODULE_DESCRIPTION("WangXun(R) 10 Gigabit PCI Express Network Driver"); 767 MODULE_LICENSE("GPL"); 768