ixgb_main.c revision ac5ac789ebcf5b27e9edc231f6d33c92d722c607
1/******************************************************************************* 2 3 Intel PRO/10GbE Linux driver 4 Copyright(c) 1999 - 2008 Intel Corporation. 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms and conditions of the GNU General Public License, 8 version 2, as published by the Free Software Foundation. 9 10 This program is distributed in the hope it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 more details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program; if not, write to the Free Software Foundation, Inc., 17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 19 The full GNU General Public License is included in this distribution in 20 the file called "COPYING". 21 22 Contact Information: 23 Linux NICS <linux.nics@intel.com> 24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> 25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 26 27*******************************************************************************/ 28 29#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 30 31#include <linux/prefetch.h> 32#include "ixgb.h" 33 34char ixgb_driver_name[] = "ixgb"; 35static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver"; 36 37#define DRIVERNAPI "-NAPI" 38#define DRV_VERSION "1.0.135-k2" DRIVERNAPI 39const char ixgb_driver_version[] = DRV_VERSION; 40static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation."; 41 42#define IXGB_CB_LENGTH 256 43static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH; 44module_param(copybreak, uint, 0644); 45MODULE_PARM_DESC(copybreak, 46 "Maximum size of packet that is copied to a new buffer on receive"); 47 48/* ixgb_pci_tbl - PCI Device ID Table 49 * 50 * Wildcard entries (PCI_ANY_ID) should come last 51 * Last entry must be all 0s 52 * 53 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, 54 * Class, Class Mask, private data (not used) } 55 */ 56static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl) = { 57 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX, 58 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 59 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4, 60 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 61 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR, 62 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 63 {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR, 64 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 65 66 /* required last entry */ 67 {0,} 68}; 69 70MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl); 71 72/* Local Function Prototypes */ 73static int ixgb_init_module(void); 74static void ixgb_exit_module(void); 75static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent); 76static void __devexit ixgb_remove(struct pci_dev *pdev); 77static int ixgb_sw_init(struct ixgb_adapter *adapter); 78static int ixgb_open(struct net_device *netdev); 79static int ixgb_close(struct net_device *netdev); 80static void ixgb_configure_tx(struct ixgb_adapter *adapter); 81static void ixgb_configure_rx(struct ixgb_adapter *adapter); 82static void ixgb_setup_rctl(struct ixgb_adapter *adapter); 83static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter); 84static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter); 85static void ixgb_set_multi(struct net_device *netdev); 86static void ixgb_watchdog(unsigned long data); 87static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb, 88 struct net_device *netdev); 89static struct net_device_stats *ixgb_get_stats(struct net_device *netdev); 90static int ixgb_change_mtu(struct net_device *netdev, int new_mtu); 91static int ixgb_set_mac(struct net_device *netdev, void *p); 92static irqreturn_t ixgb_intr(int irq, void *data); 93static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter); 94 95static int ixgb_clean(struct napi_struct *, int); 96static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int); 97static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int); 98 99static void ixgb_tx_timeout(struct net_device *dev); 100static void ixgb_tx_timeout_task(struct work_struct *work); 101 102static void ixgb_vlan_strip_enable(struct ixgb_adapter *adapter); 103static void ixgb_vlan_strip_disable(struct ixgb_adapter *adapter); 104static void ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid); 105static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid); 106static void ixgb_restore_vlan(struct ixgb_adapter *adapter); 107 108#ifdef CONFIG_NET_POLL_CONTROLLER 109/* for netdump / net console */ 110static void ixgb_netpoll(struct net_device *dev); 111#endif 112 113static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev, 114 enum pci_channel_state state); 115static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev); 116static void ixgb_io_resume (struct pci_dev *pdev); 117 118static struct pci_error_handlers ixgb_err_handler = { 119 .error_detected = ixgb_io_error_detected, 120 .slot_reset = ixgb_io_slot_reset, 121 .resume = ixgb_io_resume, 122}; 123 124static struct pci_driver ixgb_driver = { 125 .name = ixgb_driver_name, 126 .id_table = ixgb_pci_tbl, 127 .probe = ixgb_probe, 128 .remove = __devexit_p(ixgb_remove), 129 .err_handler = &ixgb_err_handler 130}; 131 132MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); 133MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver"); 134MODULE_LICENSE("GPL"); 135MODULE_VERSION(DRV_VERSION); 136 137#define DEFAULT_DEBUG_LEVEL_SHIFT 3 138static int debug = DEFAULT_DEBUG_LEVEL_SHIFT; 139module_param(debug, int, 0); 140MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 141 142/** 143 * ixgb_init_module - Driver Registration Routine 144 * 145 * ixgb_init_module is the first routine called when the driver is 146 * loaded. All it does is register with the PCI subsystem. 147 **/ 148 149static int __init 150ixgb_init_module(void) 151{ 152 pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version); 153 pr_info("%s\n", ixgb_copyright); 154 155 return pci_register_driver(&ixgb_driver); 156} 157 158module_init(ixgb_init_module); 159 160/** 161 * ixgb_exit_module - Driver Exit Cleanup Routine 162 * 163 * ixgb_exit_module is called just before the driver is removed 164 * from memory. 165 **/ 166 167static void __exit 168ixgb_exit_module(void) 169{ 170 pci_unregister_driver(&ixgb_driver); 171} 172 173module_exit(ixgb_exit_module); 174 175/** 176 * ixgb_irq_disable - Mask off interrupt generation on the NIC 177 * @adapter: board private structure 178 **/ 179 180static void 181ixgb_irq_disable(struct ixgb_adapter *adapter) 182{ 183 IXGB_WRITE_REG(&adapter->hw, IMC, ~0); 184 IXGB_WRITE_FLUSH(&adapter->hw); 185 synchronize_irq(adapter->pdev->irq); 186} 187 188/** 189 * ixgb_irq_enable - Enable default interrupt generation settings 190 * @adapter: board private structure 191 **/ 192 193static void 194ixgb_irq_enable(struct ixgb_adapter *adapter) 195{ 196 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | 197 IXGB_INT_TXDW | IXGB_INT_LSC; 198 if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID) 199 val |= IXGB_INT_GPI0; 200 IXGB_WRITE_REG(&adapter->hw, IMS, val); 201 IXGB_WRITE_FLUSH(&adapter->hw); 202} 203 204int 205ixgb_up(struct ixgb_adapter *adapter) 206{ 207 struct net_device *netdev = adapter->netdev; 208 int err, irq_flags = IRQF_SHARED; 209 int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; 210 struct ixgb_hw *hw = &adapter->hw; 211 212 /* hardware has been reset, we need to reload some things */ 213 214 ixgb_rar_set(hw, netdev->dev_addr, 0); 215 ixgb_set_multi(netdev); 216 217 ixgb_restore_vlan(adapter); 218 219 ixgb_configure_tx(adapter); 220 ixgb_setup_rctl(adapter); 221 ixgb_configure_rx(adapter); 222 ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring)); 223 224 /* disable interrupts and get the hardware into a known state */ 225 IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); 226 227 /* only enable MSI if bus is in PCI-X mode */ 228 if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) { 229 err = pci_enable_msi(adapter->pdev); 230 if (!err) { 231 adapter->have_msi = 1; 232 irq_flags = 0; 233 } 234 /* proceed to try to request regular interrupt */ 235 } 236 237 err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags, 238 netdev->name, netdev); 239 if (err) { 240 if (adapter->have_msi) 241 pci_disable_msi(adapter->pdev); 242 netif_err(adapter, probe, adapter->netdev, 243 "Unable to allocate interrupt Error: %d\n", err); 244 return err; 245 } 246 247 if ((hw->max_frame_size != max_frame) || 248 (hw->max_frame_size != 249 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) { 250 251 hw->max_frame_size = max_frame; 252 253 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); 254 255 if (hw->max_frame_size > 256 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { 257 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); 258 259 if (!(ctrl0 & IXGB_CTRL0_JFE)) { 260 ctrl0 |= IXGB_CTRL0_JFE; 261 IXGB_WRITE_REG(hw, CTRL0, ctrl0); 262 } 263 } 264 } 265 266 clear_bit(__IXGB_DOWN, &adapter->flags); 267 268 napi_enable(&adapter->napi); 269 ixgb_irq_enable(adapter); 270 271 netif_wake_queue(netdev); 272 273 mod_timer(&adapter->watchdog_timer, jiffies); 274 275 return 0; 276} 277 278void 279ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog) 280{ 281 struct net_device *netdev = adapter->netdev; 282 283 /* prevent the interrupt handler from restarting watchdog */ 284 set_bit(__IXGB_DOWN, &adapter->flags); 285 286 napi_disable(&adapter->napi); 287 /* waiting for NAPI to complete can re-enable interrupts */ 288 ixgb_irq_disable(adapter); 289 free_irq(adapter->pdev->irq, netdev); 290 291 if (adapter->have_msi) 292 pci_disable_msi(adapter->pdev); 293 294 if (kill_watchdog) 295 del_timer_sync(&adapter->watchdog_timer); 296 297 adapter->link_speed = 0; 298 adapter->link_duplex = 0; 299 netif_carrier_off(netdev); 300 netif_stop_queue(netdev); 301 302 ixgb_reset(adapter); 303 ixgb_clean_tx_ring(adapter); 304 ixgb_clean_rx_ring(adapter); 305} 306 307void 308ixgb_reset(struct ixgb_adapter *adapter) 309{ 310 struct ixgb_hw *hw = &adapter->hw; 311 312 ixgb_adapter_stop(hw); 313 if (!ixgb_init_hw(hw)) 314 netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n"); 315 316 /* restore frame size information */ 317 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT); 318 if (hw->max_frame_size > 319 IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) { 320 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0); 321 if (!(ctrl0 & IXGB_CTRL0_JFE)) { 322 ctrl0 |= IXGB_CTRL0_JFE; 323 IXGB_WRITE_REG(hw, CTRL0, ctrl0); 324 } 325 } 326} 327 328static int 329ixgb_set_features(struct net_device *netdev, u32 features) 330{ 331 struct ixgb_adapter *adapter = netdev_priv(netdev); 332 u32 changed = features ^ netdev->features; 333 334 if (!(changed & NETIF_F_RXCSUM)) 335 return 0; 336 337 adapter->rx_csum = !!(features & NETIF_F_RXCSUM); 338 339 if (netif_running(netdev)) { 340 ixgb_down(adapter, true); 341 ixgb_up(adapter); 342 ixgb_set_speed_duplex(netdev); 343 } else 344 ixgb_reset(adapter); 345 346 return 0; 347} 348 349 350static const struct net_device_ops ixgb_netdev_ops = { 351 .ndo_open = ixgb_open, 352 .ndo_stop = ixgb_close, 353 .ndo_start_xmit = ixgb_xmit_frame, 354 .ndo_get_stats = ixgb_get_stats, 355 .ndo_set_rx_mode = ixgb_set_multi, 356 .ndo_validate_addr = eth_validate_addr, 357 .ndo_set_mac_address = ixgb_set_mac, 358 .ndo_change_mtu = ixgb_change_mtu, 359 .ndo_tx_timeout = ixgb_tx_timeout, 360 .ndo_vlan_rx_add_vid = ixgb_vlan_rx_add_vid, 361 .ndo_vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid, 362#ifdef CONFIG_NET_POLL_CONTROLLER 363 .ndo_poll_controller = ixgb_netpoll, 364#endif 365 .ndo_set_features = ixgb_set_features, 366}; 367 368/** 369 * ixgb_probe - Device Initialization Routine 370 * @pdev: PCI device information struct 371 * @ent: entry in ixgb_pci_tbl 372 * 373 * Returns 0 on success, negative on failure 374 * 375 * ixgb_probe initializes an adapter identified by a pci_dev structure. 376 * The OS initialization, configuring of the adapter private structure, 377 * and a hardware reset occur. 378 **/ 379 380static int __devinit 381ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 382{ 383 struct net_device *netdev = NULL; 384 struct ixgb_adapter *adapter; 385 static int cards_found = 0; 386 int pci_using_dac; 387 int i; 388 int err; 389 390 err = pci_enable_device(pdev); 391 if (err) 392 return err; 393 394 pci_using_dac = 0; 395 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); 396 if (!err) { 397 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 398 if (!err) 399 pci_using_dac = 1; 400 } else { 401 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 402 if (err) { 403 err = dma_set_coherent_mask(&pdev->dev, 404 DMA_BIT_MASK(32)); 405 if (err) { 406 pr_err("No usable DMA configuration, aborting\n"); 407 goto err_dma_mask; 408 } 409 } 410 } 411 412 err = pci_request_regions(pdev, ixgb_driver_name); 413 if (err) 414 goto err_request_regions; 415 416 pci_set_master(pdev); 417 418 netdev = alloc_etherdev(sizeof(struct ixgb_adapter)); 419 if (!netdev) { 420 err = -ENOMEM; 421 goto err_alloc_etherdev; 422 } 423 424 SET_NETDEV_DEV(netdev, &pdev->dev); 425 426 pci_set_drvdata(pdev, netdev); 427 adapter = netdev_priv(netdev); 428 adapter->netdev = netdev; 429 adapter->pdev = pdev; 430 adapter->hw.back = adapter; 431 adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT); 432 433 adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0); 434 if (!adapter->hw.hw_addr) { 435 err = -EIO; 436 goto err_ioremap; 437 } 438 439 for (i = BAR_1; i <= BAR_5; i++) { 440 if (pci_resource_len(pdev, i) == 0) 441 continue; 442 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { 443 adapter->hw.io_base = pci_resource_start(pdev, i); 444 break; 445 } 446 } 447 448 netdev->netdev_ops = &ixgb_netdev_ops; 449 ixgb_set_ethtool_ops(netdev); 450 netdev->watchdog_timeo = 5 * HZ; 451 netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64); 452 453 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); 454 455 adapter->bd_number = cards_found; 456 adapter->link_speed = 0; 457 adapter->link_duplex = 0; 458 459 /* setup the private structure */ 460 461 err = ixgb_sw_init(adapter); 462 if (err) 463 goto err_sw_init; 464 465 netdev->hw_features = NETIF_F_SG | 466 NETIF_F_TSO | 467 NETIF_F_HW_CSUM; 468 netdev->features = netdev->hw_features | 469 NETIF_F_HW_VLAN_TX | 470 NETIF_F_HW_VLAN_RX | 471 NETIF_F_HW_VLAN_FILTER; 472 netdev->hw_features |= NETIF_F_RXCSUM; 473 474 if (pci_using_dac) { 475 netdev->features |= NETIF_F_HIGHDMA; 476 netdev->vlan_features |= NETIF_F_HIGHDMA; 477 } 478 479 /* make sure the EEPROM is good */ 480 481 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { 482 netif_err(adapter, probe, adapter->netdev, 483 "The EEPROM Checksum Is Not Valid\n"); 484 err = -EIO; 485 goto err_eeprom; 486 } 487 488 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); 489 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); 490 491 if (!is_valid_ether_addr(netdev->perm_addr)) { 492 netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n"); 493 err = -EIO; 494 goto err_eeprom; 495 } 496 497 adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw); 498 499 init_timer(&adapter->watchdog_timer); 500 adapter->watchdog_timer.function = ixgb_watchdog; 501 adapter->watchdog_timer.data = (unsigned long)adapter; 502 503 INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task); 504 505 strcpy(netdev->name, "eth%d"); 506 err = register_netdev(netdev); 507 if (err) 508 goto err_register; 509 510 /* carrier off reporting is important to ethtool even BEFORE open */ 511 netif_carrier_off(netdev); 512 513 netif_info(adapter, probe, adapter->netdev, 514 "Intel(R) PRO/10GbE Network Connection\n"); 515 ixgb_check_options(adapter); 516 /* reset the hardware with the new settings */ 517 518 ixgb_reset(adapter); 519 520 cards_found++; 521 return 0; 522 523err_register: 524err_sw_init: 525err_eeprom: 526 iounmap(adapter->hw.hw_addr); 527err_ioremap: 528 free_netdev(netdev); 529err_alloc_etherdev: 530 pci_release_regions(pdev); 531err_request_regions: 532err_dma_mask: 533 pci_disable_device(pdev); 534 return err; 535} 536 537/** 538 * ixgb_remove - Device Removal Routine 539 * @pdev: PCI device information struct 540 * 541 * ixgb_remove is called by the PCI subsystem to alert the driver 542 * that it should release a PCI device. The could be caused by a 543 * Hot-Plug event, or because the driver is going to be removed from 544 * memory. 545 **/ 546 547static void __devexit 548ixgb_remove(struct pci_dev *pdev) 549{ 550 struct net_device *netdev = pci_get_drvdata(pdev); 551 struct ixgb_adapter *adapter = netdev_priv(netdev); 552 553 cancel_work_sync(&adapter->tx_timeout_task); 554 555 unregister_netdev(netdev); 556 557 iounmap(adapter->hw.hw_addr); 558 pci_release_regions(pdev); 559 560 free_netdev(netdev); 561 pci_disable_device(pdev); 562} 563 564/** 565 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter) 566 * @adapter: board private structure to initialize 567 * 568 * ixgb_sw_init initializes the Adapter private data structure. 569 * Fields are initialized based on PCI device information and 570 * OS network device settings (MTU size). 571 **/ 572 573static int __devinit 574ixgb_sw_init(struct ixgb_adapter *adapter) 575{ 576 struct ixgb_hw *hw = &adapter->hw; 577 struct net_device *netdev = adapter->netdev; 578 struct pci_dev *pdev = adapter->pdev; 579 580 /* PCI config space info */ 581 582 hw->vendor_id = pdev->vendor; 583 hw->device_id = pdev->device; 584 hw->subsystem_vendor_id = pdev->subsystem_vendor; 585 hw->subsystem_id = pdev->subsystem_device; 586 587 hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; 588 adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */ 589 590 if ((hw->device_id == IXGB_DEVICE_ID_82597EX) || 591 (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) || 592 (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) || 593 (hw->device_id == IXGB_DEVICE_ID_82597EX_SR)) 594 hw->mac_type = ixgb_82597; 595 else { 596 /* should never have loaded on this device */ 597 netif_err(adapter, probe, adapter->netdev, "unsupported device id\n"); 598 } 599 600 /* enable flow control to be programmed */ 601 hw->fc.send_xon = 1; 602 603 set_bit(__IXGB_DOWN, &adapter->flags); 604 return 0; 605} 606 607/** 608 * ixgb_open - Called when a network interface is made active 609 * @netdev: network interface device structure 610 * 611 * Returns 0 on success, negative value on failure 612 * 613 * The open entry point is called when a network interface is made 614 * active by the system (IFF_UP). At this point all resources needed 615 * for transmit and receive operations are allocated, the interrupt 616 * handler is registered with the OS, the watchdog timer is started, 617 * and the stack is notified that the interface is ready. 618 **/ 619 620static int 621ixgb_open(struct net_device *netdev) 622{ 623 struct ixgb_adapter *adapter = netdev_priv(netdev); 624 int err; 625 626 /* allocate transmit descriptors */ 627 err = ixgb_setup_tx_resources(adapter); 628 if (err) 629 goto err_setup_tx; 630 631 netif_carrier_off(netdev); 632 633 /* allocate receive descriptors */ 634 635 err = ixgb_setup_rx_resources(adapter); 636 if (err) 637 goto err_setup_rx; 638 639 err = ixgb_up(adapter); 640 if (err) 641 goto err_up; 642 643 netif_start_queue(netdev); 644 645 return 0; 646 647err_up: 648 ixgb_free_rx_resources(adapter); 649err_setup_rx: 650 ixgb_free_tx_resources(adapter); 651err_setup_tx: 652 ixgb_reset(adapter); 653 654 return err; 655} 656 657/** 658 * ixgb_close - Disables a network interface 659 * @netdev: network interface device structure 660 * 661 * Returns 0, this is not allowed to fail 662 * 663 * The close entry point is called when an interface is de-activated 664 * by the OS. The hardware is still under the drivers control, but 665 * needs to be disabled. A global MAC reset is issued to stop the 666 * hardware, and all transmit and receive resources are freed. 667 **/ 668 669static int 670ixgb_close(struct net_device *netdev) 671{ 672 struct ixgb_adapter *adapter = netdev_priv(netdev); 673 674 ixgb_down(adapter, true); 675 676 ixgb_free_tx_resources(adapter); 677 ixgb_free_rx_resources(adapter); 678 679 return 0; 680} 681 682/** 683 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors) 684 * @adapter: board private structure 685 * 686 * Return 0 on success, negative on failure 687 **/ 688 689int 690ixgb_setup_tx_resources(struct ixgb_adapter *adapter) 691{ 692 struct ixgb_desc_ring *txdr = &adapter->tx_ring; 693 struct pci_dev *pdev = adapter->pdev; 694 int size; 695 696 size = sizeof(struct ixgb_buffer) * txdr->count; 697 txdr->buffer_info = vzalloc(size); 698 if (!txdr->buffer_info) { 699 netif_err(adapter, probe, adapter->netdev, 700 "Unable to allocate transmit descriptor ring memory\n"); 701 return -ENOMEM; 702 } 703 704 /* round up to nearest 4K */ 705 706 txdr->size = txdr->count * sizeof(struct ixgb_tx_desc); 707 txdr->size = ALIGN(txdr->size, 4096); 708 709 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, 710 GFP_KERNEL); 711 if (!txdr->desc) { 712 vfree(txdr->buffer_info); 713 netif_err(adapter, probe, adapter->netdev, 714 "Unable to allocate transmit descriptor memory\n"); 715 return -ENOMEM; 716 } 717 memset(txdr->desc, 0, txdr->size); 718 719 txdr->next_to_use = 0; 720 txdr->next_to_clean = 0; 721 722 return 0; 723} 724 725/** 726 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset. 727 * @adapter: board private structure 728 * 729 * Configure the Tx unit of the MAC after a reset. 730 **/ 731 732static void 733ixgb_configure_tx(struct ixgb_adapter *adapter) 734{ 735 u64 tdba = adapter->tx_ring.dma; 736 u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc); 737 u32 tctl; 738 struct ixgb_hw *hw = &adapter->hw; 739 740 /* Setup the Base and Length of the Tx Descriptor Ring 741 * tx_ring.dma can be either a 32 or 64 bit value 742 */ 743 744 IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL)); 745 IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32)); 746 747 IXGB_WRITE_REG(hw, TDLEN, tdlen); 748 749 /* Setup the HW Tx Head and Tail descriptor pointers */ 750 751 IXGB_WRITE_REG(hw, TDH, 0); 752 IXGB_WRITE_REG(hw, TDT, 0); 753 754 /* don't set up txdctl, it induces performance problems if configured 755 * incorrectly */ 756 /* Set the Tx Interrupt Delay register */ 757 758 IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay); 759 760 /* Program the Transmit Control Register */ 761 762 tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE; 763 IXGB_WRITE_REG(hw, TCTL, tctl); 764 765 /* Setup Transmit Descriptor Settings for this adapter */ 766 adapter->tx_cmd_type = 767 IXGB_TX_DESC_TYPE | 768 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0); 769} 770 771/** 772 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors) 773 * @adapter: board private structure 774 * 775 * Returns 0 on success, negative on failure 776 **/ 777 778int 779ixgb_setup_rx_resources(struct ixgb_adapter *adapter) 780{ 781 struct ixgb_desc_ring *rxdr = &adapter->rx_ring; 782 struct pci_dev *pdev = adapter->pdev; 783 int size; 784 785 size = sizeof(struct ixgb_buffer) * rxdr->count; 786 rxdr->buffer_info = vzalloc(size); 787 if (!rxdr->buffer_info) { 788 netif_err(adapter, probe, adapter->netdev, 789 "Unable to allocate receive descriptor ring\n"); 790 return -ENOMEM; 791 } 792 793 /* Round up to nearest 4K */ 794 795 rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc); 796 rxdr->size = ALIGN(rxdr->size, 4096); 797 798 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, 799 GFP_KERNEL); 800 801 if (!rxdr->desc) { 802 vfree(rxdr->buffer_info); 803 netif_err(adapter, probe, adapter->netdev, 804 "Unable to allocate receive descriptors\n"); 805 return -ENOMEM; 806 } 807 memset(rxdr->desc, 0, rxdr->size); 808 809 rxdr->next_to_clean = 0; 810 rxdr->next_to_use = 0; 811 812 return 0; 813} 814 815/** 816 * ixgb_setup_rctl - configure the receive control register 817 * @adapter: Board private structure 818 **/ 819 820static void 821ixgb_setup_rctl(struct ixgb_adapter *adapter) 822{ 823 u32 rctl; 824 825 rctl = IXGB_READ_REG(&adapter->hw, RCTL); 826 827 rctl &= ~(3 << IXGB_RCTL_MO_SHIFT); 828 829 rctl |= 830 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 | 831 IXGB_RCTL_RXEN | IXGB_RCTL_CFF | 832 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT); 833 834 rctl |= IXGB_RCTL_SECRC; 835 836 if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048) 837 rctl |= IXGB_RCTL_BSIZE_2048; 838 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096) 839 rctl |= IXGB_RCTL_BSIZE_4096; 840 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192) 841 rctl |= IXGB_RCTL_BSIZE_8192; 842 else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384) 843 rctl |= IXGB_RCTL_BSIZE_16384; 844 845 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl); 846} 847 848/** 849 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset. 850 * @adapter: board private structure 851 * 852 * Configure the Rx unit of the MAC after a reset. 853 **/ 854 855static void 856ixgb_configure_rx(struct ixgb_adapter *adapter) 857{ 858 u64 rdba = adapter->rx_ring.dma; 859 u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc); 860 struct ixgb_hw *hw = &adapter->hw; 861 u32 rctl; 862 u32 rxcsum; 863 864 /* make sure receives are disabled while setting up the descriptors */ 865 866 rctl = IXGB_READ_REG(hw, RCTL); 867 IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN); 868 869 /* set the Receive Delay Timer Register */ 870 871 IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay); 872 873 /* Setup the Base and Length of the Rx Descriptor Ring */ 874 875 IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL)); 876 IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32)); 877 878 IXGB_WRITE_REG(hw, RDLEN, rdlen); 879 880 /* Setup the HW Rx Head and Tail Descriptor Pointers */ 881 IXGB_WRITE_REG(hw, RDH, 0); 882 IXGB_WRITE_REG(hw, RDT, 0); 883 884 /* due to the hardware errata with RXDCTL, we are unable to use any of 885 * the performance enhancing features of it without causing other 886 * subtle bugs, some of the bugs could include receive length 887 * corruption at high data rates (WTHRESH > 0) and/or receive 888 * descriptor ring irregularites (particularly in hardware cache) */ 889 IXGB_WRITE_REG(hw, RXDCTL, 0); 890 891 /* Enable Receive Checksum Offload for TCP and UDP */ 892 if (adapter->rx_csum) { 893 rxcsum = IXGB_READ_REG(hw, RXCSUM); 894 rxcsum |= IXGB_RXCSUM_TUOFL; 895 IXGB_WRITE_REG(hw, RXCSUM, rxcsum); 896 } 897 898 /* Enable Receives */ 899 900 IXGB_WRITE_REG(hw, RCTL, rctl); 901} 902 903/** 904 * ixgb_free_tx_resources - Free Tx Resources 905 * @adapter: board private structure 906 * 907 * Free all transmit software resources 908 **/ 909 910void 911ixgb_free_tx_resources(struct ixgb_adapter *adapter) 912{ 913 struct pci_dev *pdev = adapter->pdev; 914 915 ixgb_clean_tx_ring(adapter); 916 917 vfree(adapter->tx_ring.buffer_info); 918 adapter->tx_ring.buffer_info = NULL; 919 920 dma_free_coherent(&pdev->dev, adapter->tx_ring.size, 921 adapter->tx_ring.desc, adapter->tx_ring.dma); 922 923 adapter->tx_ring.desc = NULL; 924} 925 926static void 927ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter, 928 struct ixgb_buffer *buffer_info) 929{ 930 if (buffer_info->dma) { 931 if (buffer_info->mapped_as_page) 932 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, 933 buffer_info->length, DMA_TO_DEVICE); 934 else 935 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, 936 buffer_info->length, DMA_TO_DEVICE); 937 buffer_info->dma = 0; 938 } 939 940 if (buffer_info->skb) { 941 dev_kfree_skb_any(buffer_info->skb); 942 buffer_info->skb = NULL; 943 } 944 buffer_info->time_stamp = 0; 945 /* these fields must always be initialized in tx 946 * buffer_info->length = 0; 947 * buffer_info->next_to_watch = 0; */ 948} 949 950/** 951 * ixgb_clean_tx_ring - Free Tx Buffers 952 * @adapter: board private structure 953 **/ 954 955static void 956ixgb_clean_tx_ring(struct ixgb_adapter *adapter) 957{ 958 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; 959 struct ixgb_buffer *buffer_info; 960 unsigned long size; 961 unsigned int i; 962 963 /* Free all the Tx ring sk_buffs */ 964 965 for (i = 0; i < tx_ring->count; i++) { 966 buffer_info = &tx_ring->buffer_info[i]; 967 ixgb_unmap_and_free_tx_resource(adapter, buffer_info); 968 } 969 970 size = sizeof(struct ixgb_buffer) * tx_ring->count; 971 memset(tx_ring->buffer_info, 0, size); 972 973 /* Zero out the descriptor ring */ 974 975 memset(tx_ring->desc, 0, tx_ring->size); 976 977 tx_ring->next_to_use = 0; 978 tx_ring->next_to_clean = 0; 979 980 IXGB_WRITE_REG(&adapter->hw, TDH, 0); 981 IXGB_WRITE_REG(&adapter->hw, TDT, 0); 982} 983 984/** 985 * ixgb_free_rx_resources - Free Rx Resources 986 * @adapter: board private structure 987 * 988 * Free all receive software resources 989 **/ 990 991void 992ixgb_free_rx_resources(struct ixgb_adapter *adapter) 993{ 994 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; 995 struct pci_dev *pdev = adapter->pdev; 996 997 ixgb_clean_rx_ring(adapter); 998 999 vfree(rx_ring->buffer_info); 1000 rx_ring->buffer_info = NULL; 1001 1002 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, 1003 rx_ring->dma); 1004 1005 rx_ring->desc = NULL; 1006} 1007 1008/** 1009 * ixgb_clean_rx_ring - Free Rx Buffers 1010 * @adapter: board private structure 1011 **/ 1012 1013static void 1014ixgb_clean_rx_ring(struct ixgb_adapter *adapter) 1015{ 1016 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; 1017 struct ixgb_buffer *buffer_info; 1018 struct pci_dev *pdev = adapter->pdev; 1019 unsigned long size; 1020 unsigned int i; 1021 1022 /* Free all the Rx ring sk_buffs */ 1023 1024 for (i = 0; i < rx_ring->count; i++) { 1025 buffer_info = &rx_ring->buffer_info[i]; 1026 if (buffer_info->dma) { 1027 dma_unmap_single(&pdev->dev, 1028 buffer_info->dma, 1029 buffer_info->length, 1030 DMA_FROM_DEVICE); 1031 buffer_info->dma = 0; 1032 buffer_info->length = 0; 1033 } 1034 1035 if (buffer_info->skb) { 1036 dev_kfree_skb(buffer_info->skb); 1037 buffer_info->skb = NULL; 1038 } 1039 } 1040 1041 size = sizeof(struct ixgb_buffer) * rx_ring->count; 1042 memset(rx_ring->buffer_info, 0, size); 1043 1044 /* Zero out the descriptor ring */ 1045 1046 memset(rx_ring->desc, 0, rx_ring->size); 1047 1048 rx_ring->next_to_clean = 0; 1049 rx_ring->next_to_use = 0; 1050 1051 IXGB_WRITE_REG(&adapter->hw, RDH, 0); 1052 IXGB_WRITE_REG(&adapter->hw, RDT, 0); 1053} 1054 1055/** 1056 * ixgb_set_mac - Change the Ethernet Address of the NIC 1057 * @netdev: network interface device structure 1058 * @p: pointer to an address structure 1059 * 1060 * Returns 0 on success, negative on failure 1061 **/ 1062 1063static int 1064ixgb_set_mac(struct net_device *netdev, void *p) 1065{ 1066 struct ixgb_adapter *adapter = netdev_priv(netdev); 1067 struct sockaddr *addr = p; 1068 1069 if (!is_valid_ether_addr(addr->sa_data)) 1070 return -EADDRNOTAVAIL; 1071 1072 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 1073 1074 ixgb_rar_set(&adapter->hw, addr->sa_data, 0); 1075 1076 return 0; 1077} 1078 1079/** 1080 * ixgb_set_multi - Multicast and Promiscuous mode set 1081 * @netdev: network interface device structure 1082 * 1083 * The set_multi entry point is called whenever the multicast address 1084 * list or the network interface flags are updated. This routine is 1085 * responsible for configuring the hardware for proper multicast, 1086 * promiscuous mode, and all-multi behavior. 1087 **/ 1088 1089static void 1090ixgb_set_multi(struct net_device *netdev) 1091{ 1092 struct ixgb_adapter *adapter = netdev_priv(netdev); 1093 struct ixgb_hw *hw = &adapter->hw; 1094 struct netdev_hw_addr *ha; 1095 u32 rctl; 1096 1097 /* Check for Promiscuous and All Multicast modes */ 1098 1099 rctl = IXGB_READ_REG(hw, RCTL); 1100 1101 if (netdev->flags & IFF_PROMISC) { 1102 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE); 1103 /* disable VLAN filtering */ 1104 rctl &= ~IXGB_RCTL_CFIEN; 1105 rctl &= ~IXGB_RCTL_VFE; 1106 } else { 1107 if (netdev->flags & IFF_ALLMULTI) { 1108 rctl |= IXGB_RCTL_MPE; 1109 rctl &= ~IXGB_RCTL_UPE; 1110 } else { 1111 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE); 1112 } 1113 /* enable VLAN filtering */ 1114 rctl |= IXGB_RCTL_VFE; 1115 rctl &= ~IXGB_RCTL_CFIEN; 1116 } 1117 1118 if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) { 1119 rctl |= IXGB_RCTL_MPE; 1120 IXGB_WRITE_REG(hw, RCTL, rctl); 1121 } else { 1122 u8 *mta = kmalloc(IXGB_MAX_NUM_MULTICAST_ADDRESSES * 1123 ETH_ALEN, GFP_ATOMIC); 1124 u8 *addr; 1125 if (!mta) { 1126 pr_err("allocation of multicast memory failed\n"); 1127 goto alloc_failed; 1128 } 1129 1130 IXGB_WRITE_REG(hw, RCTL, rctl); 1131 1132 addr = mta; 1133 netdev_for_each_mc_addr(ha, netdev) { 1134 memcpy(addr, ha->addr, ETH_ALEN); 1135 addr += ETH_ALEN; 1136 } 1137 1138 ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0); 1139 kfree(mta); 1140 } 1141 1142alloc_failed: 1143 if (netdev->features & NETIF_F_HW_VLAN_RX) 1144 ixgb_vlan_strip_enable(adapter); 1145 else 1146 ixgb_vlan_strip_disable(adapter); 1147 1148} 1149 1150/** 1151 * ixgb_watchdog - Timer Call-back 1152 * @data: pointer to netdev cast into an unsigned long 1153 **/ 1154 1155static void 1156ixgb_watchdog(unsigned long data) 1157{ 1158 struct ixgb_adapter *adapter = (struct ixgb_adapter *)data; 1159 struct net_device *netdev = adapter->netdev; 1160 struct ixgb_desc_ring *txdr = &adapter->tx_ring; 1161 1162 ixgb_check_for_link(&adapter->hw); 1163 1164 if (ixgb_check_for_bad_link(&adapter->hw)) { 1165 /* force the reset path */ 1166 netif_stop_queue(netdev); 1167 } 1168 1169 if (adapter->hw.link_up) { 1170 if (!netif_carrier_ok(netdev)) { 1171 netdev_info(netdev, 1172 "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n", 1173 (adapter->hw.fc.type == ixgb_fc_full) ? 1174 "RX/TX" : 1175 (adapter->hw.fc.type == ixgb_fc_rx_pause) ? 1176 "RX" : 1177 (adapter->hw.fc.type == ixgb_fc_tx_pause) ? 1178 "TX" : "None"); 1179 adapter->link_speed = 10000; 1180 adapter->link_duplex = FULL_DUPLEX; 1181 netif_carrier_on(netdev); 1182 } 1183 } else { 1184 if (netif_carrier_ok(netdev)) { 1185 adapter->link_speed = 0; 1186 adapter->link_duplex = 0; 1187 netdev_info(netdev, "NIC Link is Down\n"); 1188 netif_carrier_off(netdev); 1189 } 1190 } 1191 1192 ixgb_update_stats(adapter); 1193 1194 if (!netif_carrier_ok(netdev)) { 1195 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) { 1196 /* We've lost link, so the controller stops DMA, 1197 * but we've got queued Tx work that's never going 1198 * to get done, so reset controller to flush Tx. 1199 * (Do the reset outside of interrupt context). */ 1200 schedule_work(&adapter->tx_timeout_task); 1201 /* return immediately since reset is imminent */ 1202 return; 1203 } 1204 } 1205 1206 /* Force detection of hung controller every watchdog period */ 1207 adapter->detect_tx_hung = true; 1208 1209 /* generate an interrupt to force clean up of any stragglers */ 1210 IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW); 1211 1212 /* Reset the timer */ 1213 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ); 1214} 1215 1216#define IXGB_TX_FLAGS_CSUM 0x00000001 1217#define IXGB_TX_FLAGS_VLAN 0x00000002 1218#define IXGB_TX_FLAGS_TSO 0x00000004 1219 1220static int 1221ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb) 1222{ 1223 struct ixgb_context_desc *context_desc; 1224 unsigned int i; 1225 u8 ipcss, ipcso, tucss, tucso, hdr_len; 1226 u16 ipcse, tucse, mss; 1227 int err; 1228 1229 if (likely(skb_is_gso(skb))) { 1230 struct ixgb_buffer *buffer_info; 1231 struct iphdr *iph; 1232 1233 if (skb_header_cloned(skb)) { 1234 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 1235 if (err) 1236 return err; 1237 } 1238 1239 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 1240 mss = skb_shinfo(skb)->gso_size; 1241 iph = ip_hdr(skb); 1242 iph->tot_len = 0; 1243 iph->check = 0; 1244 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, 1245 iph->daddr, 0, 1246 IPPROTO_TCP, 0); 1247 ipcss = skb_network_offset(skb); 1248 ipcso = (void *)&(iph->check) - (void *)skb->data; 1249 ipcse = skb_transport_offset(skb) - 1; 1250 tucss = skb_transport_offset(skb); 1251 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; 1252 tucse = 0; 1253 1254 i = adapter->tx_ring.next_to_use; 1255 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); 1256 buffer_info = &adapter->tx_ring.buffer_info[i]; 1257 WARN_ON(buffer_info->dma != 0); 1258 1259 context_desc->ipcss = ipcss; 1260 context_desc->ipcso = ipcso; 1261 context_desc->ipcse = cpu_to_le16(ipcse); 1262 context_desc->tucss = tucss; 1263 context_desc->tucso = tucso; 1264 context_desc->tucse = cpu_to_le16(tucse); 1265 context_desc->mss = cpu_to_le16(mss); 1266 context_desc->hdr_len = hdr_len; 1267 context_desc->status = 0; 1268 context_desc->cmd_type_len = cpu_to_le32( 1269 IXGB_CONTEXT_DESC_TYPE 1270 | IXGB_CONTEXT_DESC_CMD_TSE 1271 | IXGB_CONTEXT_DESC_CMD_IP 1272 | IXGB_CONTEXT_DESC_CMD_TCP 1273 | IXGB_CONTEXT_DESC_CMD_IDE 1274 | (skb->len - (hdr_len))); 1275 1276 1277 if (++i == adapter->tx_ring.count) i = 0; 1278 adapter->tx_ring.next_to_use = i; 1279 1280 return 1; 1281 } 1282 1283 return 0; 1284} 1285 1286static bool 1287ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb) 1288{ 1289 struct ixgb_context_desc *context_desc; 1290 unsigned int i; 1291 u8 css, cso; 1292 1293 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 1294 struct ixgb_buffer *buffer_info; 1295 css = skb_checksum_start_offset(skb); 1296 cso = css + skb->csum_offset; 1297 1298 i = adapter->tx_ring.next_to_use; 1299 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i); 1300 buffer_info = &adapter->tx_ring.buffer_info[i]; 1301 WARN_ON(buffer_info->dma != 0); 1302 1303 context_desc->tucss = css; 1304 context_desc->tucso = cso; 1305 context_desc->tucse = 0; 1306 /* zero out any previously existing data in one instruction */ 1307 *(u32 *)&(context_desc->ipcss) = 0; 1308 context_desc->status = 0; 1309 context_desc->hdr_len = 0; 1310 context_desc->mss = 0; 1311 context_desc->cmd_type_len = 1312 cpu_to_le32(IXGB_CONTEXT_DESC_TYPE 1313 | IXGB_TX_DESC_CMD_IDE); 1314 1315 if (++i == adapter->tx_ring.count) i = 0; 1316 adapter->tx_ring.next_to_use = i; 1317 1318 return true; 1319 } 1320 1321 return false; 1322} 1323 1324#define IXGB_MAX_TXD_PWR 14 1325#define IXGB_MAX_DATA_PER_TXD (1<<IXGB_MAX_TXD_PWR) 1326 1327static int 1328ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb, 1329 unsigned int first) 1330{ 1331 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; 1332 struct pci_dev *pdev = adapter->pdev; 1333 struct ixgb_buffer *buffer_info; 1334 int len = skb_headlen(skb); 1335 unsigned int offset = 0, size, count = 0, i; 1336 unsigned int mss = skb_shinfo(skb)->gso_size; 1337 unsigned int nr_frags = skb_shinfo(skb)->nr_frags; 1338 unsigned int f; 1339 1340 i = tx_ring->next_to_use; 1341 1342 while (len) { 1343 buffer_info = &tx_ring->buffer_info[i]; 1344 size = min(len, IXGB_MAX_DATA_PER_TXD); 1345 /* Workaround for premature desc write-backs 1346 * in TSO mode. Append 4-byte sentinel desc */ 1347 if (unlikely(mss && !nr_frags && size == len && size > 8)) 1348 size -= 4; 1349 1350 buffer_info->length = size; 1351 WARN_ON(buffer_info->dma != 0); 1352 buffer_info->time_stamp = jiffies; 1353 buffer_info->mapped_as_page = false; 1354 buffer_info->dma = dma_map_single(&pdev->dev, 1355 skb->data + offset, 1356 size, DMA_TO_DEVICE); 1357 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 1358 goto dma_error; 1359 buffer_info->next_to_watch = 0; 1360 1361 len -= size; 1362 offset += size; 1363 count++; 1364 if (len) { 1365 i++; 1366 if (i == tx_ring->count) 1367 i = 0; 1368 } 1369 } 1370 1371 for (f = 0; f < nr_frags; f++) { 1372 struct skb_frag_struct *frag; 1373 1374 frag = &skb_shinfo(skb)->frags[f]; 1375 len = frag->size; 1376 offset = 0; 1377 1378 while (len) { 1379 i++; 1380 if (i == tx_ring->count) 1381 i = 0; 1382 1383 buffer_info = &tx_ring->buffer_info[i]; 1384 size = min(len, IXGB_MAX_DATA_PER_TXD); 1385 1386 /* Workaround for premature desc write-backs 1387 * in TSO mode. Append 4-byte sentinel desc */ 1388 if (unlikely(mss && (f == (nr_frags - 1)) 1389 && size == len && size > 8)) 1390 size -= 4; 1391 1392 buffer_info->length = size; 1393 buffer_info->time_stamp = jiffies; 1394 buffer_info->mapped_as_page = true; 1395 buffer_info->dma = 1396 skb_frag_dma_map(&pdev->dev, frag, offset, size, 1397 DMA_TO_DEVICE); 1398 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 1399 goto dma_error; 1400 buffer_info->next_to_watch = 0; 1401 1402 len -= size; 1403 offset += size; 1404 count++; 1405 } 1406 } 1407 tx_ring->buffer_info[i].skb = skb; 1408 tx_ring->buffer_info[first].next_to_watch = i; 1409 1410 return count; 1411 1412dma_error: 1413 dev_err(&pdev->dev, "TX DMA map failed\n"); 1414 buffer_info->dma = 0; 1415 if (count) 1416 count--; 1417 1418 while (count--) { 1419 if (i==0) 1420 i += tx_ring->count; 1421 i--; 1422 buffer_info = &tx_ring->buffer_info[i]; 1423 ixgb_unmap_and_free_tx_resource(adapter, buffer_info); 1424 } 1425 1426 return 0; 1427} 1428 1429static void 1430ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags) 1431{ 1432 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; 1433 struct ixgb_tx_desc *tx_desc = NULL; 1434 struct ixgb_buffer *buffer_info; 1435 u32 cmd_type_len = adapter->tx_cmd_type; 1436 u8 status = 0; 1437 u8 popts = 0; 1438 unsigned int i; 1439 1440 if (tx_flags & IXGB_TX_FLAGS_TSO) { 1441 cmd_type_len |= IXGB_TX_DESC_CMD_TSE; 1442 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM); 1443 } 1444 1445 if (tx_flags & IXGB_TX_FLAGS_CSUM) 1446 popts |= IXGB_TX_DESC_POPTS_TXSM; 1447 1448 if (tx_flags & IXGB_TX_FLAGS_VLAN) 1449 cmd_type_len |= IXGB_TX_DESC_CMD_VLE; 1450 1451 i = tx_ring->next_to_use; 1452 1453 while (count--) { 1454 buffer_info = &tx_ring->buffer_info[i]; 1455 tx_desc = IXGB_TX_DESC(*tx_ring, i); 1456 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma); 1457 tx_desc->cmd_type_len = 1458 cpu_to_le32(cmd_type_len | buffer_info->length); 1459 tx_desc->status = status; 1460 tx_desc->popts = popts; 1461 tx_desc->vlan = cpu_to_le16(vlan_id); 1462 1463 if (++i == tx_ring->count) i = 0; 1464 } 1465 1466 tx_desc->cmd_type_len |= 1467 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS); 1468 1469 /* Force memory writes to complete before letting h/w 1470 * know there are new descriptors to fetch. (Only 1471 * applicable for weak-ordered memory model archs, 1472 * such as IA-64). */ 1473 wmb(); 1474 1475 tx_ring->next_to_use = i; 1476 IXGB_WRITE_REG(&adapter->hw, TDT, i); 1477} 1478 1479static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size) 1480{ 1481 struct ixgb_adapter *adapter = netdev_priv(netdev); 1482 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; 1483 1484 netif_stop_queue(netdev); 1485 /* Herbert's original patch had: 1486 * smp_mb__after_netif_stop_queue(); 1487 * but since that doesn't exist yet, just open code it. */ 1488 smp_mb(); 1489 1490 /* We need to check again in a case another CPU has just 1491 * made room available. */ 1492 if (likely(IXGB_DESC_UNUSED(tx_ring) < size)) 1493 return -EBUSY; 1494 1495 /* A reprieve! */ 1496 netif_start_queue(netdev); 1497 ++adapter->restart_queue; 1498 return 0; 1499} 1500 1501static int ixgb_maybe_stop_tx(struct net_device *netdev, 1502 struct ixgb_desc_ring *tx_ring, int size) 1503{ 1504 if (likely(IXGB_DESC_UNUSED(tx_ring) >= size)) 1505 return 0; 1506 return __ixgb_maybe_stop_tx(netdev, size); 1507} 1508 1509 1510/* Tx Descriptors needed, worst case */ 1511#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \ 1512 (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) 1513#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \ 1514 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \ 1515 + 1 /* one more needed for sentinel TSO workaround */ 1516 1517static netdev_tx_t 1518ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 1519{ 1520 struct ixgb_adapter *adapter = netdev_priv(netdev); 1521 unsigned int first; 1522 unsigned int tx_flags = 0; 1523 int vlan_id = 0; 1524 int count = 0; 1525 int tso; 1526 1527 if (test_bit(__IXGB_DOWN, &adapter->flags)) { 1528 dev_kfree_skb(skb); 1529 return NETDEV_TX_OK; 1530 } 1531 1532 if (skb->len <= 0) { 1533 dev_kfree_skb(skb); 1534 return NETDEV_TX_OK; 1535 } 1536 1537 if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, 1538 DESC_NEEDED))) 1539 return NETDEV_TX_BUSY; 1540 1541 if (vlan_tx_tag_present(skb)) { 1542 tx_flags |= IXGB_TX_FLAGS_VLAN; 1543 vlan_id = vlan_tx_tag_get(skb); 1544 } 1545 1546 first = adapter->tx_ring.next_to_use; 1547 1548 tso = ixgb_tso(adapter, skb); 1549 if (tso < 0) { 1550 dev_kfree_skb(skb); 1551 return NETDEV_TX_OK; 1552 } 1553 1554 if (likely(tso)) 1555 tx_flags |= IXGB_TX_FLAGS_TSO; 1556 else if (ixgb_tx_csum(adapter, skb)) 1557 tx_flags |= IXGB_TX_FLAGS_CSUM; 1558 1559 count = ixgb_tx_map(adapter, skb, first); 1560 1561 if (count) { 1562 ixgb_tx_queue(adapter, count, vlan_id, tx_flags); 1563 /* Make sure there is space in the ring for the next send. */ 1564 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED); 1565 1566 } else { 1567 dev_kfree_skb_any(skb); 1568 adapter->tx_ring.buffer_info[first].time_stamp = 0; 1569 adapter->tx_ring.next_to_use = first; 1570 } 1571 1572 return NETDEV_TX_OK; 1573} 1574 1575/** 1576 * ixgb_tx_timeout - Respond to a Tx Hang 1577 * @netdev: network interface device structure 1578 **/ 1579 1580static void 1581ixgb_tx_timeout(struct net_device *netdev) 1582{ 1583 struct ixgb_adapter *adapter = netdev_priv(netdev); 1584 1585 /* Do the reset outside of interrupt context */ 1586 schedule_work(&adapter->tx_timeout_task); 1587} 1588 1589static void 1590ixgb_tx_timeout_task(struct work_struct *work) 1591{ 1592 struct ixgb_adapter *adapter = 1593 container_of(work, struct ixgb_adapter, tx_timeout_task); 1594 1595 adapter->tx_timeout_count++; 1596 ixgb_down(adapter, true); 1597 ixgb_up(adapter); 1598} 1599 1600/** 1601 * ixgb_get_stats - Get System Network Statistics 1602 * @netdev: network interface device structure 1603 * 1604 * Returns the address of the device statistics structure. 1605 * The statistics are actually updated from the timer callback. 1606 **/ 1607 1608static struct net_device_stats * 1609ixgb_get_stats(struct net_device *netdev) 1610{ 1611 return &netdev->stats; 1612} 1613 1614/** 1615 * ixgb_change_mtu - Change the Maximum Transfer Unit 1616 * @netdev: network interface device structure 1617 * @new_mtu: new value for maximum frame size 1618 * 1619 * Returns 0 on success, negative on failure 1620 **/ 1621 1622static int 1623ixgb_change_mtu(struct net_device *netdev, int new_mtu) 1624{ 1625 struct ixgb_adapter *adapter = netdev_priv(netdev); 1626 int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; 1627 int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH; 1628 1629 /* MTU < 68 is an error for IPv4 traffic, just don't allow it */ 1630 if ((new_mtu < 68) || 1631 (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) { 1632 netif_err(adapter, probe, adapter->netdev, 1633 "Invalid MTU setting %d\n", new_mtu); 1634 return -EINVAL; 1635 } 1636 1637 if (old_max_frame == max_frame) 1638 return 0; 1639 1640 if (netif_running(netdev)) 1641 ixgb_down(adapter, true); 1642 1643 adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */ 1644 1645 netdev->mtu = new_mtu; 1646 1647 if (netif_running(netdev)) 1648 ixgb_up(adapter); 1649 1650 return 0; 1651} 1652 1653/** 1654 * ixgb_update_stats - Update the board statistics counters. 1655 * @adapter: board private structure 1656 **/ 1657 1658void 1659ixgb_update_stats(struct ixgb_adapter *adapter) 1660{ 1661 struct net_device *netdev = adapter->netdev; 1662 struct pci_dev *pdev = adapter->pdev; 1663 1664 /* Prevent stats update while adapter is being reset */ 1665 if (pci_channel_offline(pdev)) 1666 return; 1667 1668 if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) || 1669 (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) { 1670 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL); 1671 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL); 1672 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH); 1673 u64 bcast = ((u64)bcast_h << 32) | bcast_l; 1674 1675 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32); 1676 /* fix up multicast stats by removing broadcasts */ 1677 if (multi >= bcast) 1678 multi -= bcast; 1679 1680 adapter->stats.mprcl += (multi & 0xFFFFFFFF); 1681 adapter->stats.mprch += (multi >> 32); 1682 adapter->stats.bprcl += bcast_l; 1683 adapter->stats.bprch += bcast_h; 1684 } else { 1685 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL); 1686 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH); 1687 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL); 1688 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH); 1689 } 1690 adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL); 1691 adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH); 1692 adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL); 1693 adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH); 1694 adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL); 1695 adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH); 1696 adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL); 1697 adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH); 1698 adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL); 1699 adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH); 1700 adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL); 1701 adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH); 1702 adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL); 1703 adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH); 1704 adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC); 1705 adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC); 1706 adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC); 1707 adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC); 1708 adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS); 1709 adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC); 1710 adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC); 1711 adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC); 1712 adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL); 1713 adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH); 1714 adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL); 1715 adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH); 1716 adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL); 1717 adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH); 1718 adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL); 1719 adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH); 1720 adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL); 1721 adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH); 1722 adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL); 1723 adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH); 1724 adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL); 1725 adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH); 1726 adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL); 1727 adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH); 1728 adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL); 1729 adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH); 1730 adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC); 1731 adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C); 1732 adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC); 1733 adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC); 1734 adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC); 1735 adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC); 1736 adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC); 1737 adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC); 1738 adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC); 1739 adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC); 1740 adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC); 1741 adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC); 1742 adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC); 1743 adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC); 1744 adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC); 1745 adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC); 1746 1747 /* Fill out the OS statistics structure */ 1748 1749 netdev->stats.rx_packets = adapter->stats.gprcl; 1750 netdev->stats.tx_packets = adapter->stats.gptcl; 1751 netdev->stats.rx_bytes = adapter->stats.gorcl; 1752 netdev->stats.tx_bytes = adapter->stats.gotcl; 1753 netdev->stats.multicast = adapter->stats.mprcl; 1754 netdev->stats.collisions = 0; 1755 1756 /* ignore RLEC as it reports errors for padded (<64bytes) frames 1757 * with a length in the type/len field */ 1758 netdev->stats.rx_errors = 1759 /* adapter->stats.rnbc + */ adapter->stats.crcerrs + 1760 adapter->stats.ruc + 1761 adapter->stats.roc /*+ adapter->stats.rlec */ + 1762 adapter->stats.icbc + 1763 adapter->stats.ecbc + adapter->stats.mpc; 1764 1765 /* see above 1766 * netdev->stats.rx_length_errors = adapter->stats.rlec; 1767 */ 1768 1769 netdev->stats.rx_crc_errors = adapter->stats.crcerrs; 1770 netdev->stats.rx_fifo_errors = adapter->stats.mpc; 1771 netdev->stats.rx_missed_errors = adapter->stats.mpc; 1772 netdev->stats.rx_over_errors = adapter->stats.mpc; 1773 1774 netdev->stats.tx_errors = 0; 1775 netdev->stats.rx_frame_errors = 0; 1776 netdev->stats.tx_aborted_errors = 0; 1777 netdev->stats.tx_carrier_errors = 0; 1778 netdev->stats.tx_fifo_errors = 0; 1779 netdev->stats.tx_heartbeat_errors = 0; 1780 netdev->stats.tx_window_errors = 0; 1781} 1782 1783#define IXGB_MAX_INTR 10 1784/** 1785 * ixgb_intr - Interrupt Handler 1786 * @irq: interrupt number 1787 * @data: pointer to a network interface device structure 1788 **/ 1789 1790static irqreturn_t 1791ixgb_intr(int irq, void *data) 1792{ 1793 struct net_device *netdev = data; 1794 struct ixgb_adapter *adapter = netdev_priv(netdev); 1795 struct ixgb_hw *hw = &adapter->hw; 1796 u32 icr = IXGB_READ_REG(hw, ICR); 1797 1798 if (unlikely(!icr)) 1799 return IRQ_NONE; /* Not our interrupt */ 1800 1801 if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) 1802 if (!test_bit(__IXGB_DOWN, &adapter->flags)) 1803 mod_timer(&adapter->watchdog_timer, jiffies); 1804 1805 if (napi_schedule_prep(&adapter->napi)) { 1806 1807 /* Disable interrupts and register for poll. The flush 1808 of the posted write is intentionally left out. 1809 */ 1810 1811 IXGB_WRITE_REG(&adapter->hw, IMC, ~0); 1812 __napi_schedule(&adapter->napi); 1813 } 1814 return IRQ_HANDLED; 1815} 1816 1817/** 1818 * ixgb_clean - NAPI Rx polling callback 1819 * @adapter: board private structure 1820 **/ 1821 1822static int 1823ixgb_clean(struct napi_struct *napi, int budget) 1824{ 1825 struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi); 1826 int work_done = 0; 1827 1828 ixgb_clean_tx_irq(adapter); 1829 ixgb_clean_rx_irq(adapter, &work_done, budget); 1830 1831 /* If budget not fully consumed, exit the polling mode */ 1832 if (work_done < budget) { 1833 napi_complete(napi); 1834 if (!test_bit(__IXGB_DOWN, &adapter->flags)) 1835 ixgb_irq_enable(adapter); 1836 } 1837 1838 return work_done; 1839} 1840 1841/** 1842 * ixgb_clean_tx_irq - Reclaim resources after transmit completes 1843 * @adapter: board private structure 1844 **/ 1845 1846static bool 1847ixgb_clean_tx_irq(struct ixgb_adapter *adapter) 1848{ 1849 struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; 1850 struct net_device *netdev = adapter->netdev; 1851 struct ixgb_tx_desc *tx_desc, *eop_desc; 1852 struct ixgb_buffer *buffer_info; 1853 unsigned int i, eop; 1854 bool cleaned = false; 1855 1856 i = tx_ring->next_to_clean; 1857 eop = tx_ring->buffer_info[i].next_to_watch; 1858 eop_desc = IXGB_TX_DESC(*tx_ring, eop); 1859 1860 while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) { 1861 1862 rmb(); /* read buffer_info after eop_desc */ 1863 for (cleaned = false; !cleaned; ) { 1864 tx_desc = IXGB_TX_DESC(*tx_ring, i); 1865 buffer_info = &tx_ring->buffer_info[i]; 1866 1867 if (tx_desc->popts & 1868 (IXGB_TX_DESC_POPTS_TXSM | 1869 IXGB_TX_DESC_POPTS_IXSM)) 1870 adapter->hw_csum_tx_good++; 1871 1872 ixgb_unmap_and_free_tx_resource(adapter, buffer_info); 1873 1874 *(u32 *)&(tx_desc->status) = 0; 1875 1876 cleaned = (i == eop); 1877 if (++i == tx_ring->count) i = 0; 1878 } 1879 1880 eop = tx_ring->buffer_info[i].next_to_watch; 1881 eop_desc = IXGB_TX_DESC(*tx_ring, eop); 1882 } 1883 1884 tx_ring->next_to_clean = i; 1885 1886 if (unlikely(cleaned && netif_carrier_ok(netdev) && 1887 IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) { 1888 /* Make sure that anybody stopping the queue after this 1889 * sees the new next_to_clean. */ 1890 smp_mb(); 1891 1892 if (netif_queue_stopped(netdev) && 1893 !(test_bit(__IXGB_DOWN, &adapter->flags))) { 1894 netif_wake_queue(netdev); 1895 ++adapter->restart_queue; 1896 } 1897 } 1898 1899 if (adapter->detect_tx_hung) { 1900 /* detect a transmit hang in hardware, this serializes the 1901 * check with the clearing of time_stamp and movement of i */ 1902 adapter->detect_tx_hung = false; 1903 if (tx_ring->buffer_info[eop].time_stamp && 1904 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ) 1905 && !(IXGB_READ_REG(&adapter->hw, STATUS) & 1906 IXGB_STATUS_TXOFF)) { 1907 /* detected Tx unit hang */ 1908 netif_err(adapter, drv, adapter->netdev, 1909 "Detected Tx Unit Hang\n" 1910 " TDH <%x>\n" 1911 " TDT <%x>\n" 1912 " next_to_use <%x>\n" 1913 " next_to_clean <%x>\n" 1914 "buffer_info[next_to_clean]\n" 1915 " time_stamp <%lx>\n" 1916 " next_to_watch <%x>\n" 1917 " jiffies <%lx>\n" 1918 " next_to_watch.status <%x>\n", 1919 IXGB_READ_REG(&adapter->hw, TDH), 1920 IXGB_READ_REG(&adapter->hw, TDT), 1921 tx_ring->next_to_use, 1922 tx_ring->next_to_clean, 1923 tx_ring->buffer_info[eop].time_stamp, 1924 eop, 1925 jiffies, 1926 eop_desc->status); 1927 netif_stop_queue(netdev); 1928 } 1929 } 1930 1931 return cleaned; 1932} 1933 1934/** 1935 * ixgb_rx_checksum - Receive Checksum Offload for 82597. 1936 * @adapter: board private structure 1937 * @rx_desc: receive descriptor 1938 * @sk_buff: socket buffer with received data 1939 **/ 1940 1941static void 1942ixgb_rx_checksum(struct ixgb_adapter *adapter, 1943 struct ixgb_rx_desc *rx_desc, 1944 struct sk_buff *skb) 1945{ 1946 /* Ignore Checksum bit is set OR 1947 * TCP Checksum has not been calculated 1948 */ 1949 if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) || 1950 (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) { 1951 skb_checksum_none_assert(skb); 1952 return; 1953 } 1954 1955 /* At this point we know the hardware did the TCP checksum */ 1956 /* now look at the TCP checksum error bit */ 1957 if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) { 1958 /* let the stack verify checksum errors */ 1959 skb_checksum_none_assert(skb); 1960 adapter->hw_csum_rx_error++; 1961 } else { 1962 /* TCP checksum is good */ 1963 skb->ip_summed = CHECKSUM_UNNECESSARY; 1964 adapter->hw_csum_rx_good++; 1965 } 1966} 1967 1968/* 1969 * this should improve performance for small packets with large amounts 1970 * of reassembly being done in the stack 1971 */ 1972static void ixgb_check_copybreak(struct net_device *netdev, 1973 struct ixgb_buffer *buffer_info, 1974 u32 length, struct sk_buff **skb) 1975{ 1976 struct sk_buff *new_skb; 1977 1978 if (length > copybreak) 1979 return; 1980 1981 new_skb = netdev_alloc_skb_ip_align(netdev, length); 1982 if (!new_skb) 1983 return; 1984 1985 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN, 1986 (*skb)->data - NET_IP_ALIGN, 1987 length + NET_IP_ALIGN); 1988 /* save the skb in buffer_info as good */ 1989 buffer_info->skb = *skb; 1990 *skb = new_skb; 1991} 1992 1993/** 1994 * ixgb_clean_rx_irq - Send received data up the network stack, 1995 * @adapter: board private structure 1996 **/ 1997 1998static bool 1999ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do) 2000{ 2001 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; 2002 struct net_device *netdev = adapter->netdev; 2003 struct pci_dev *pdev = adapter->pdev; 2004 struct ixgb_rx_desc *rx_desc, *next_rxd; 2005 struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer; 2006 u32 length; 2007 unsigned int i, j; 2008 int cleaned_count = 0; 2009 bool cleaned = false; 2010 2011 i = rx_ring->next_to_clean; 2012 rx_desc = IXGB_RX_DESC(*rx_ring, i); 2013 buffer_info = &rx_ring->buffer_info[i]; 2014 2015 while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) { 2016 struct sk_buff *skb; 2017 u8 status; 2018 2019 if (*work_done >= work_to_do) 2020 break; 2021 2022 (*work_done)++; 2023 rmb(); /* read descriptor and rx_buffer_info after status DD */ 2024 status = rx_desc->status; 2025 skb = buffer_info->skb; 2026 buffer_info->skb = NULL; 2027 2028 prefetch(skb->data - NET_IP_ALIGN); 2029 2030 if (++i == rx_ring->count) 2031 i = 0; 2032 next_rxd = IXGB_RX_DESC(*rx_ring, i); 2033 prefetch(next_rxd); 2034 2035 j = i + 1; 2036 if (j == rx_ring->count) 2037 j = 0; 2038 next2_buffer = &rx_ring->buffer_info[j]; 2039 prefetch(next2_buffer); 2040 2041 next_buffer = &rx_ring->buffer_info[i]; 2042 2043 cleaned = true; 2044 cleaned_count++; 2045 2046 dma_unmap_single(&pdev->dev, 2047 buffer_info->dma, 2048 buffer_info->length, 2049 DMA_FROM_DEVICE); 2050 buffer_info->dma = 0; 2051 2052 length = le16_to_cpu(rx_desc->length); 2053 rx_desc->length = 0; 2054 2055 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) { 2056 2057 /* All receives must fit into a single buffer */ 2058 2059 IXGB_DBG("Receive packet consumed multiple buffers " 2060 "length<%x>\n", length); 2061 2062 dev_kfree_skb_irq(skb); 2063 goto rxdesc_done; 2064 } 2065 2066 if (unlikely(rx_desc->errors & 2067 (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE | 2068 IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) { 2069 dev_kfree_skb_irq(skb); 2070 goto rxdesc_done; 2071 } 2072 2073 ixgb_check_copybreak(netdev, buffer_info, length, &skb); 2074 2075 /* Good Receive */ 2076 skb_put(skb, length); 2077 2078 /* Receive Checksum Offload */ 2079 ixgb_rx_checksum(adapter, rx_desc, skb); 2080 2081 skb->protocol = eth_type_trans(skb, netdev); 2082 if (status & IXGB_RX_DESC_STATUS_VP) 2083 __vlan_hwaccel_put_tag(skb, 2084 le16_to_cpu(rx_desc->special)); 2085 2086 netif_receive_skb(skb); 2087 2088rxdesc_done: 2089 /* clean up descriptor, might be written over by hw */ 2090 rx_desc->status = 0; 2091 2092 /* return some buffers to hardware, one at a time is too slow */ 2093 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) { 2094 ixgb_alloc_rx_buffers(adapter, cleaned_count); 2095 cleaned_count = 0; 2096 } 2097 2098 /* use prefetched values */ 2099 rx_desc = next_rxd; 2100 buffer_info = next_buffer; 2101 } 2102 2103 rx_ring->next_to_clean = i; 2104 2105 cleaned_count = IXGB_DESC_UNUSED(rx_ring); 2106 if (cleaned_count) 2107 ixgb_alloc_rx_buffers(adapter, cleaned_count); 2108 2109 return cleaned; 2110} 2111 2112/** 2113 * ixgb_alloc_rx_buffers - Replace used receive buffers 2114 * @adapter: address of board private structure 2115 **/ 2116 2117static void 2118ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count) 2119{ 2120 struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; 2121 struct net_device *netdev = adapter->netdev; 2122 struct pci_dev *pdev = adapter->pdev; 2123 struct ixgb_rx_desc *rx_desc; 2124 struct ixgb_buffer *buffer_info; 2125 struct sk_buff *skb; 2126 unsigned int i; 2127 long cleancount; 2128 2129 i = rx_ring->next_to_use; 2130 buffer_info = &rx_ring->buffer_info[i]; 2131 cleancount = IXGB_DESC_UNUSED(rx_ring); 2132 2133 2134 /* leave three descriptors unused */ 2135 while (--cleancount > 2 && cleaned_count--) { 2136 /* recycle! its good for you */ 2137 skb = buffer_info->skb; 2138 if (skb) { 2139 skb_trim(skb, 0); 2140 goto map_skb; 2141 } 2142 2143 skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len); 2144 if (unlikely(!skb)) { 2145 /* Better luck next round */ 2146 adapter->alloc_rx_buff_failed++; 2147 break; 2148 } 2149 2150 buffer_info->skb = skb; 2151 buffer_info->length = adapter->rx_buffer_len; 2152map_skb: 2153 buffer_info->dma = dma_map_single(&pdev->dev, 2154 skb->data, 2155 adapter->rx_buffer_len, 2156 DMA_FROM_DEVICE); 2157 2158 rx_desc = IXGB_RX_DESC(*rx_ring, i); 2159 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma); 2160 /* guarantee DD bit not set now before h/w gets descriptor 2161 * this is the rest of the workaround for h/w double 2162 * writeback. */ 2163 rx_desc->status = 0; 2164 2165 2166 if (++i == rx_ring->count) i = 0; 2167 buffer_info = &rx_ring->buffer_info[i]; 2168 } 2169 2170 if (likely(rx_ring->next_to_use != i)) { 2171 rx_ring->next_to_use = i; 2172 if (unlikely(i-- == 0)) 2173 i = (rx_ring->count - 1); 2174 2175 /* Force memory writes to complete before letting h/w 2176 * know there are new descriptors to fetch. (Only 2177 * applicable for weak-ordered memory model archs, such 2178 * as IA-64). */ 2179 wmb(); 2180 IXGB_WRITE_REG(&adapter->hw, RDT, i); 2181 } 2182} 2183 2184static void 2185ixgb_vlan_strip_enable(struct ixgb_adapter *adapter) 2186{ 2187 u32 ctrl; 2188 2189 /* enable VLAN tag insert/strip */ 2190 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); 2191 ctrl |= IXGB_CTRL0_VME; 2192 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); 2193} 2194 2195static void 2196ixgb_vlan_strip_disable(struct ixgb_adapter *adapter) 2197{ 2198 u32 ctrl; 2199 2200 /* disable VLAN tag insert/strip */ 2201 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0); 2202 ctrl &= ~IXGB_CTRL0_VME; 2203 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl); 2204} 2205 2206static void 2207ixgb_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 2208{ 2209 struct ixgb_adapter *adapter = netdev_priv(netdev); 2210 u32 vfta, index; 2211 2212 /* add VID to filter table */ 2213 2214 index = (vid >> 5) & 0x7F; 2215 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); 2216 vfta |= (1 << (vid & 0x1F)); 2217 ixgb_write_vfta(&adapter->hw, index, vfta); 2218 set_bit(vid, adapter->active_vlans); 2219} 2220 2221static void 2222ixgb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 2223{ 2224 struct ixgb_adapter *adapter = netdev_priv(netdev); 2225 u32 vfta, index; 2226 2227 /* remove VID from filter table */ 2228 2229 index = (vid >> 5) & 0x7F; 2230 vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index); 2231 vfta &= ~(1 << (vid & 0x1F)); 2232 ixgb_write_vfta(&adapter->hw, index, vfta); 2233 clear_bit(vid, adapter->active_vlans); 2234} 2235 2236static void 2237ixgb_restore_vlan(struct ixgb_adapter *adapter) 2238{ 2239 u16 vid; 2240 2241 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 2242 ixgb_vlan_rx_add_vid(adapter->netdev, vid); 2243} 2244 2245#ifdef CONFIG_NET_POLL_CONTROLLER 2246/* 2247 * Polling 'interrupt' - used by things like netconsole to send skbs 2248 * without having to re-enable interrupts. It's not called while 2249 * the interrupt routine is executing. 2250 */ 2251 2252static void ixgb_netpoll(struct net_device *dev) 2253{ 2254 struct ixgb_adapter *adapter = netdev_priv(dev); 2255 2256 disable_irq(adapter->pdev->irq); 2257 ixgb_intr(adapter->pdev->irq, dev); 2258 enable_irq(adapter->pdev->irq); 2259} 2260#endif 2261 2262/** 2263 * ixgb_io_error_detected() - called when PCI error is detected 2264 * @pdev pointer to pci device with error 2265 * @state pci channel state after error 2266 * 2267 * This callback is called by the PCI subsystem whenever 2268 * a PCI bus error is detected. 2269 */ 2270static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev, 2271 enum pci_channel_state state) 2272{ 2273 struct net_device *netdev = pci_get_drvdata(pdev); 2274 struct ixgb_adapter *adapter = netdev_priv(netdev); 2275 2276 netif_device_detach(netdev); 2277 2278 if (state == pci_channel_io_perm_failure) 2279 return PCI_ERS_RESULT_DISCONNECT; 2280 2281 if (netif_running(netdev)) 2282 ixgb_down(adapter, true); 2283 2284 pci_disable_device(pdev); 2285 2286 /* Request a slot reset. */ 2287 return PCI_ERS_RESULT_NEED_RESET; 2288} 2289 2290/** 2291 * ixgb_io_slot_reset - called after the pci bus has been reset. 2292 * @pdev pointer to pci device with error 2293 * 2294 * This callback is called after the PCI bus has been reset. 2295 * Basically, this tries to restart the card from scratch. 2296 * This is a shortened version of the device probe/discovery code, 2297 * it resembles the first-half of the ixgb_probe() routine. 2298 */ 2299static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev) 2300{ 2301 struct net_device *netdev = pci_get_drvdata(pdev); 2302 struct ixgb_adapter *adapter = netdev_priv(netdev); 2303 2304 if (pci_enable_device(pdev)) { 2305 netif_err(adapter, probe, adapter->netdev, 2306 "Cannot re-enable PCI device after reset\n"); 2307 return PCI_ERS_RESULT_DISCONNECT; 2308 } 2309 2310 /* Perform card reset only on one instance of the card */ 2311 if (0 != PCI_FUNC (pdev->devfn)) 2312 return PCI_ERS_RESULT_RECOVERED; 2313 2314 pci_set_master(pdev); 2315 2316 netif_carrier_off(netdev); 2317 netif_stop_queue(netdev); 2318 ixgb_reset(adapter); 2319 2320 /* Make sure the EEPROM is good */ 2321 if (!ixgb_validate_eeprom_checksum(&adapter->hw)) { 2322 netif_err(adapter, probe, adapter->netdev, 2323 "After reset, the EEPROM checksum is not valid\n"); 2324 return PCI_ERS_RESULT_DISCONNECT; 2325 } 2326 ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr); 2327 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len); 2328 2329 if (!is_valid_ether_addr(netdev->perm_addr)) { 2330 netif_err(adapter, probe, adapter->netdev, 2331 "After reset, invalid MAC address\n"); 2332 return PCI_ERS_RESULT_DISCONNECT; 2333 } 2334 2335 return PCI_ERS_RESULT_RECOVERED; 2336} 2337 2338/** 2339 * ixgb_io_resume - called when its OK to resume normal operations 2340 * @pdev pointer to pci device with error 2341 * 2342 * The error recovery driver tells us that its OK to resume 2343 * normal operation. Implementation resembles the second-half 2344 * of the ixgb_probe() routine. 2345 */ 2346static void ixgb_io_resume(struct pci_dev *pdev) 2347{ 2348 struct net_device *netdev = pci_get_drvdata(pdev); 2349 struct ixgb_adapter *adapter = netdev_priv(netdev); 2350 2351 pci_set_master(pdev); 2352 2353 if (netif_running(netdev)) { 2354 if (ixgb_up(adapter)) { 2355 pr_err("can't bring device back up after reset\n"); 2356 return; 2357 } 2358 } 2359 2360 netif_device_attach(netdev); 2361 mod_timer(&adapter->watchdog_timer, jiffies); 2362} 2363 2364/* ixgb_main.c */ 2365