1 /******************************************************************************* 2 3 Intel PRO/1000 Linux driver 4 Copyright(c) 1999 - 2006 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 #include "e1000.h" 30 #include <net/ip6_checksum.h> 31 #include <linux/io.h> 32 #include <linux/prefetch.h> 33 #include <linux/bitops.h> 34 #include <linux/if_vlan.h> 35 36 char e1000_driver_name[] = "e1000"; 37 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver"; 38 #define DRV_VERSION "7.3.21-k8-NAPI" 39 const char e1000_driver_version[] = DRV_VERSION; 40 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation."; 41 42 /* e1000_pci_tbl - PCI Device ID Table 43 * 44 * Last entry must be all 0s 45 * 46 * Macro expands to... 47 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)} 48 */ 49 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = { 50 INTEL_E1000_ETHERNET_DEVICE(0x1000), 51 INTEL_E1000_ETHERNET_DEVICE(0x1001), 52 INTEL_E1000_ETHERNET_DEVICE(0x1004), 53 INTEL_E1000_ETHERNET_DEVICE(0x1008), 54 INTEL_E1000_ETHERNET_DEVICE(0x1009), 55 INTEL_E1000_ETHERNET_DEVICE(0x100C), 56 INTEL_E1000_ETHERNET_DEVICE(0x100D), 57 INTEL_E1000_ETHERNET_DEVICE(0x100E), 58 INTEL_E1000_ETHERNET_DEVICE(0x100F), 59 INTEL_E1000_ETHERNET_DEVICE(0x1010), 60 INTEL_E1000_ETHERNET_DEVICE(0x1011), 61 INTEL_E1000_ETHERNET_DEVICE(0x1012), 62 INTEL_E1000_ETHERNET_DEVICE(0x1013), 63 INTEL_E1000_ETHERNET_DEVICE(0x1014), 64 INTEL_E1000_ETHERNET_DEVICE(0x1015), 65 INTEL_E1000_ETHERNET_DEVICE(0x1016), 66 INTEL_E1000_ETHERNET_DEVICE(0x1017), 67 INTEL_E1000_ETHERNET_DEVICE(0x1018), 68 INTEL_E1000_ETHERNET_DEVICE(0x1019), 69 INTEL_E1000_ETHERNET_DEVICE(0x101A), 70 INTEL_E1000_ETHERNET_DEVICE(0x101D), 71 INTEL_E1000_ETHERNET_DEVICE(0x101E), 72 INTEL_E1000_ETHERNET_DEVICE(0x1026), 73 INTEL_E1000_ETHERNET_DEVICE(0x1027), 74 INTEL_E1000_ETHERNET_DEVICE(0x1028), 75 INTEL_E1000_ETHERNET_DEVICE(0x1075), 76 INTEL_E1000_ETHERNET_DEVICE(0x1076), 77 INTEL_E1000_ETHERNET_DEVICE(0x1077), 78 INTEL_E1000_ETHERNET_DEVICE(0x1078), 79 INTEL_E1000_ETHERNET_DEVICE(0x1079), 80 INTEL_E1000_ETHERNET_DEVICE(0x107A), 81 INTEL_E1000_ETHERNET_DEVICE(0x107B), 82 INTEL_E1000_ETHERNET_DEVICE(0x107C), 83 INTEL_E1000_ETHERNET_DEVICE(0x108A), 84 INTEL_E1000_ETHERNET_DEVICE(0x1099), 85 INTEL_E1000_ETHERNET_DEVICE(0x10B5), 86 INTEL_E1000_ETHERNET_DEVICE(0x2E6E), 87 /* required last entry */ 88 {0,} 89 }; 90 91 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl); 92 93 int e1000_up(struct e1000_adapter *adapter); 94 void e1000_down(struct e1000_adapter *adapter); 95 void e1000_reinit_locked(struct e1000_adapter *adapter); 96 void e1000_reset(struct e1000_adapter *adapter); 97 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter); 98 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter); 99 void e1000_free_all_tx_resources(struct e1000_adapter *adapter); 100 void e1000_free_all_rx_resources(struct e1000_adapter *adapter); 101 static int e1000_setup_tx_resources(struct e1000_adapter *adapter, 102 struct e1000_tx_ring *txdr); 103 static int e1000_setup_rx_resources(struct e1000_adapter *adapter, 104 struct e1000_rx_ring *rxdr); 105 static void e1000_free_tx_resources(struct e1000_adapter *adapter, 106 struct e1000_tx_ring *tx_ring); 107 static void e1000_free_rx_resources(struct e1000_adapter *adapter, 108 struct e1000_rx_ring *rx_ring); 109 void e1000_update_stats(struct e1000_adapter *adapter); 110 111 static int e1000_init_module(void); 112 static void e1000_exit_module(void); 113 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent); 114 static void e1000_remove(struct pci_dev *pdev); 115 static int e1000_alloc_queues(struct e1000_adapter *adapter); 116 static int e1000_sw_init(struct e1000_adapter *adapter); 117 static int e1000_open(struct net_device *netdev); 118 static int e1000_close(struct net_device *netdev); 119 static void e1000_configure_tx(struct e1000_adapter *adapter); 120 static void e1000_configure_rx(struct e1000_adapter *adapter); 121 static void e1000_setup_rctl(struct e1000_adapter *adapter); 122 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter); 123 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter); 124 static void e1000_clean_tx_ring(struct e1000_adapter *adapter, 125 struct e1000_tx_ring *tx_ring); 126 static void e1000_clean_rx_ring(struct e1000_adapter *adapter, 127 struct e1000_rx_ring *rx_ring); 128 static void e1000_set_rx_mode(struct net_device *netdev); 129 static void e1000_update_phy_info_task(struct work_struct *work); 130 static void e1000_watchdog(struct work_struct *work); 131 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work); 132 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, 133 struct net_device *netdev); 134 static struct net_device_stats * e1000_get_stats(struct net_device *netdev); 135 static int e1000_change_mtu(struct net_device *netdev, int new_mtu); 136 static int e1000_set_mac(struct net_device *netdev, void *p); 137 static irqreturn_t e1000_intr(int irq, void *data); 138 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, 139 struct e1000_tx_ring *tx_ring); 140 static int e1000_clean(struct napi_struct *napi, int budget); 141 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, 142 struct e1000_rx_ring *rx_ring, 143 int *work_done, int work_to_do); 144 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, 145 struct e1000_rx_ring *rx_ring, 146 int *work_done, int work_to_do); 147 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, 148 struct e1000_rx_ring *rx_ring, 149 int cleaned_count); 150 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, 151 struct e1000_rx_ring *rx_ring, 152 int cleaned_count); 153 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); 154 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, 155 int cmd); 156 static void e1000_enter_82542_rst(struct e1000_adapter *adapter); 157 static void e1000_leave_82542_rst(struct e1000_adapter *adapter); 158 static void e1000_tx_timeout(struct net_device *dev); 159 static void e1000_reset_task(struct work_struct *work); 160 static void e1000_smartspeed(struct e1000_adapter *adapter); 161 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, 162 struct sk_buff *skb); 163 164 static bool e1000_vlan_used(struct e1000_adapter *adapter); 165 static void e1000_vlan_mode(struct net_device *netdev, 166 netdev_features_t features); 167 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter, 168 bool filter_on); 169 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid); 170 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid); 171 static void e1000_restore_vlan(struct e1000_adapter *adapter); 172 173 #ifdef CONFIG_PM 174 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state); 175 static int e1000_resume(struct pci_dev *pdev); 176 #endif 177 static void e1000_shutdown(struct pci_dev *pdev); 178 179 #ifdef CONFIG_NET_POLL_CONTROLLER 180 /* for netdump / net console */ 181 static void e1000_netpoll (struct net_device *netdev); 182 #endif 183 184 #define COPYBREAK_DEFAULT 256 185 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT; 186 module_param(copybreak, uint, 0644); 187 MODULE_PARM_DESC(copybreak, 188 "Maximum size of packet that is copied to a new buffer on receive"); 189 190 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, 191 pci_channel_state_t state); 192 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev); 193 static void e1000_io_resume(struct pci_dev *pdev); 194 195 static const struct pci_error_handlers e1000_err_handler = { 196 .error_detected = e1000_io_error_detected, 197 .slot_reset = e1000_io_slot_reset, 198 .resume = e1000_io_resume, 199 }; 200 201 static struct pci_driver e1000_driver = { 202 .name = e1000_driver_name, 203 .id_table = e1000_pci_tbl, 204 .probe = e1000_probe, 205 .remove = e1000_remove, 206 #ifdef CONFIG_PM 207 /* Power Management Hooks */ 208 .suspend = e1000_suspend, 209 .resume = e1000_resume, 210 #endif 211 .shutdown = e1000_shutdown, 212 .err_handler = &e1000_err_handler 213 }; 214 215 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); 216 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver"); 217 MODULE_LICENSE("GPL"); 218 MODULE_VERSION(DRV_VERSION); 219 220 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) 221 static int debug = -1; 222 module_param(debug, int, 0); 223 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 224 225 /** 226 * e1000_get_hw_dev - return device 227 * used by hardware layer to print debugging information 228 * 229 **/ 230 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw) 231 { 232 struct e1000_adapter *adapter = hw->back; 233 return adapter->netdev; 234 } 235 236 /** 237 * e1000_init_module - Driver Registration Routine 238 * 239 * e1000_init_module is the first routine called when the driver is 240 * loaded. All it does is register with the PCI subsystem. 241 **/ 242 243 static int __init e1000_init_module(void) 244 { 245 int ret; 246 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version); 247 248 pr_info("%s\n", e1000_copyright); 249 250 ret = pci_register_driver(&e1000_driver); 251 if (copybreak != COPYBREAK_DEFAULT) { 252 if (copybreak == 0) 253 pr_info("copybreak disabled\n"); 254 else 255 pr_info("copybreak enabled for " 256 "packets <= %u bytes\n", copybreak); 257 } 258 return ret; 259 } 260 261 module_init(e1000_init_module); 262 263 /** 264 * e1000_exit_module - Driver Exit Cleanup Routine 265 * 266 * e1000_exit_module is called just before the driver is removed 267 * from memory. 268 **/ 269 270 static void __exit e1000_exit_module(void) 271 { 272 pci_unregister_driver(&e1000_driver); 273 } 274 275 module_exit(e1000_exit_module); 276 277 static int e1000_request_irq(struct e1000_adapter *adapter) 278 { 279 struct net_device *netdev = adapter->netdev; 280 irq_handler_t handler = e1000_intr; 281 int irq_flags = IRQF_SHARED; 282 int err; 283 284 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name, 285 netdev); 286 if (err) { 287 e_err(probe, "Unable to allocate interrupt Error: %d\n", err); 288 } 289 290 return err; 291 } 292 293 static void e1000_free_irq(struct e1000_adapter *adapter) 294 { 295 struct net_device *netdev = adapter->netdev; 296 297 free_irq(adapter->pdev->irq, netdev); 298 } 299 300 /** 301 * e1000_irq_disable - Mask off interrupt generation on the NIC 302 * @adapter: board private structure 303 **/ 304 305 static void e1000_irq_disable(struct e1000_adapter *adapter) 306 { 307 struct e1000_hw *hw = &adapter->hw; 308 309 ew32(IMC, ~0); 310 E1000_WRITE_FLUSH(); 311 synchronize_irq(adapter->pdev->irq); 312 } 313 314 /** 315 * e1000_irq_enable - Enable default interrupt generation settings 316 * @adapter: board private structure 317 **/ 318 319 static void e1000_irq_enable(struct e1000_adapter *adapter) 320 { 321 struct e1000_hw *hw = &adapter->hw; 322 323 ew32(IMS, IMS_ENABLE_MASK); 324 E1000_WRITE_FLUSH(); 325 } 326 327 static void e1000_update_mng_vlan(struct e1000_adapter *adapter) 328 { 329 struct e1000_hw *hw = &adapter->hw; 330 struct net_device *netdev = adapter->netdev; 331 u16 vid = hw->mng_cookie.vlan_id; 332 u16 old_vid = adapter->mng_vlan_id; 333 334 if (!e1000_vlan_used(adapter)) 335 return; 336 337 if (!test_bit(vid, adapter->active_vlans)) { 338 if (hw->mng_cookie.status & 339 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) { 340 e1000_vlan_rx_add_vid(netdev, vid); 341 adapter->mng_vlan_id = vid; 342 } else { 343 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; 344 } 345 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && 346 (vid != old_vid) && 347 !test_bit(old_vid, adapter->active_vlans)) 348 e1000_vlan_rx_kill_vid(netdev, old_vid); 349 } else { 350 adapter->mng_vlan_id = vid; 351 } 352 } 353 354 static void e1000_init_manageability(struct e1000_adapter *adapter) 355 { 356 struct e1000_hw *hw = &adapter->hw; 357 358 if (adapter->en_mng_pt) { 359 u32 manc = er32(MANC); 360 361 /* disable hardware interception of ARP */ 362 manc &= ~(E1000_MANC_ARP_EN); 363 364 ew32(MANC, manc); 365 } 366 } 367 368 static void e1000_release_manageability(struct e1000_adapter *adapter) 369 { 370 struct e1000_hw *hw = &adapter->hw; 371 372 if (adapter->en_mng_pt) { 373 u32 manc = er32(MANC); 374 375 /* re-enable hardware interception of ARP */ 376 manc |= E1000_MANC_ARP_EN; 377 378 ew32(MANC, manc); 379 } 380 } 381 382 /** 383 * e1000_configure - configure the hardware for RX and TX 384 * @adapter = private board structure 385 **/ 386 static void e1000_configure(struct e1000_adapter *adapter) 387 { 388 struct net_device *netdev = adapter->netdev; 389 int i; 390 391 e1000_set_rx_mode(netdev); 392 393 e1000_restore_vlan(adapter); 394 e1000_init_manageability(adapter); 395 396 e1000_configure_tx(adapter); 397 e1000_setup_rctl(adapter); 398 e1000_configure_rx(adapter); 399 /* call E1000_DESC_UNUSED which always leaves 400 * at least 1 descriptor unused to make sure 401 * next_to_use != next_to_clean */ 402 for (i = 0; i < adapter->num_rx_queues; i++) { 403 struct e1000_rx_ring *ring = &adapter->rx_ring[i]; 404 adapter->alloc_rx_buf(adapter, ring, 405 E1000_DESC_UNUSED(ring)); 406 } 407 } 408 409 int e1000_up(struct e1000_adapter *adapter) 410 { 411 struct e1000_hw *hw = &adapter->hw; 412 413 /* hardware has been reset, we need to reload some things */ 414 e1000_configure(adapter); 415 416 clear_bit(__E1000_DOWN, &adapter->flags); 417 418 napi_enable(&adapter->napi); 419 420 e1000_irq_enable(adapter); 421 422 netif_wake_queue(adapter->netdev); 423 424 /* fire a link change interrupt to start the watchdog */ 425 ew32(ICS, E1000_ICS_LSC); 426 return 0; 427 } 428 429 /** 430 * e1000_power_up_phy - restore link in case the phy was powered down 431 * @adapter: address of board private structure 432 * 433 * The phy may be powered down to save power and turn off link when the 434 * driver is unloaded and wake on lan is not enabled (among others) 435 * *** this routine MUST be followed by a call to e1000_reset *** 436 * 437 **/ 438 439 void e1000_power_up_phy(struct e1000_adapter *adapter) 440 { 441 struct e1000_hw *hw = &adapter->hw; 442 u16 mii_reg = 0; 443 444 /* Just clear the power down bit to wake the phy back up */ 445 if (hw->media_type == e1000_media_type_copper) { 446 /* according to the manual, the phy will retain its 447 * settings across a power-down/up cycle */ 448 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg); 449 mii_reg &= ~MII_CR_POWER_DOWN; 450 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg); 451 } 452 } 453 454 static void e1000_power_down_phy(struct e1000_adapter *adapter) 455 { 456 struct e1000_hw *hw = &adapter->hw; 457 458 /* Power down the PHY so no link is implied when interface is down * 459 * The PHY cannot be powered down if any of the following is true * 460 * (a) WoL is enabled 461 * (b) AMT is active 462 * (c) SoL/IDER session is active */ 463 if (!adapter->wol && hw->mac_type >= e1000_82540 && 464 hw->media_type == e1000_media_type_copper) { 465 u16 mii_reg = 0; 466 467 switch (hw->mac_type) { 468 case e1000_82540: 469 case e1000_82545: 470 case e1000_82545_rev_3: 471 case e1000_82546: 472 case e1000_ce4100: 473 case e1000_82546_rev_3: 474 case e1000_82541: 475 case e1000_82541_rev_2: 476 case e1000_82547: 477 case e1000_82547_rev_2: 478 if (er32(MANC) & E1000_MANC_SMBUS_EN) 479 goto out; 480 break; 481 default: 482 goto out; 483 } 484 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg); 485 mii_reg |= MII_CR_POWER_DOWN; 486 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg); 487 msleep(1); 488 } 489 out: 490 return; 491 } 492 493 static void e1000_down_and_stop(struct e1000_adapter *adapter) 494 { 495 set_bit(__E1000_DOWN, &adapter->flags); 496 497 /* Only kill reset task if adapter is not resetting */ 498 if (!test_bit(__E1000_RESETTING, &adapter->flags)) 499 cancel_work_sync(&adapter->reset_task); 500 501 cancel_delayed_work_sync(&adapter->watchdog_task); 502 cancel_delayed_work_sync(&adapter->phy_info_task); 503 cancel_delayed_work_sync(&adapter->fifo_stall_task); 504 } 505 506 void e1000_down(struct e1000_adapter *adapter) 507 { 508 struct e1000_hw *hw = &adapter->hw; 509 struct net_device *netdev = adapter->netdev; 510 u32 rctl, tctl; 511 512 513 /* disable receives in the hardware */ 514 rctl = er32(RCTL); 515 ew32(RCTL, rctl & ~E1000_RCTL_EN); 516 /* flush and sleep below */ 517 518 netif_tx_disable(netdev); 519 520 /* disable transmits in the hardware */ 521 tctl = er32(TCTL); 522 tctl &= ~E1000_TCTL_EN; 523 ew32(TCTL, tctl); 524 /* flush both disables and wait for them to finish */ 525 E1000_WRITE_FLUSH(); 526 msleep(10); 527 528 napi_disable(&adapter->napi); 529 530 e1000_irq_disable(adapter); 531 532 /* 533 * Setting DOWN must be after irq_disable to prevent 534 * a screaming interrupt. Setting DOWN also prevents 535 * tasks from rescheduling. 536 */ 537 e1000_down_and_stop(adapter); 538 539 adapter->link_speed = 0; 540 adapter->link_duplex = 0; 541 netif_carrier_off(netdev); 542 543 e1000_reset(adapter); 544 e1000_clean_all_tx_rings(adapter); 545 e1000_clean_all_rx_rings(adapter); 546 } 547 548 static void e1000_reinit_safe(struct e1000_adapter *adapter) 549 { 550 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) 551 msleep(1); 552 mutex_lock(&adapter->mutex); 553 e1000_down(adapter); 554 e1000_up(adapter); 555 mutex_unlock(&adapter->mutex); 556 clear_bit(__E1000_RESETTING, &adapter->flags); 557 } 558 559 void e1000_reinit_locked(struct e1000_adapter *adapter) 560 { 561 /* if rtnl_lock is not held the call path is bogus */ 562 ASSERT_RTNL(); 563 WARN_ON(in_interrupt()); 564 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) 565 msleep(1); 566 e1000_down(adapter); 567 e1000_up(adapter); 568 clear_bit(__E1000_RESETTING, &adapter->flags); 569 } 570 571 void e1000_reset(struct e1000_adapter *adapter) 572 { 573 struct e1000_hw *hw = &adapter->hw; 574 u32 pba = 0, tx_space, min_tx_space, min_rx_space; 575 bool legacy_pba_adjust = false; 576 u16 hwm; 577 578 /* Repartition Pba for greater than 9k mtu 579 * To take effect CTRL.RST is required. 580 */ 581 582 switch (hw->mac_type) { 583 case e1000_82542_rev2_0: 584 case e1000_82542_rev2_1: 585 case e1000_82543: 586 case e1000_82544: 587 case e1000_82540: 588 case e1000_82541: 589 case e1000_82541_rev_2: 590 legacy_pba_adjust = true; 591 pba = E1000_PBA_48K; 592 break; 593 case e1000_82545: 594 case e1000_82545_rev_3: 595 case e1000_82546: 596 case e1000_ce4100: 597 case e1000_82546_rev_3: 598 pba = E1000_PBA_48K; 599 break; 600 case e1000_82547: 601 case e1000_82547_rev_2: 602 legacy_pba_adjust = true; 603 pba = E1000_PBA_30K; 604 break; 605 case e1000_undefined: 606 case e1000_num_macs: 607 break; 608 } 609 610 if (legacy_pba_adjust) { 611 if (hw->max_frame_size > E1000_RXBUFFER_8192) 612 pba -= 8; /* allocate more FIFO for Tx */ 613 614 if (hw->mac_type == e1000_82547) { 615 adapter->tx_fifo_head = 0; 616 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT; 617 adapter->tx_fifo_size = 618 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT; 619 atomic_set(&adapter->tx_fifo_stall, 0); 620 } 621 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) { 622 /* adjust PBA for jumbo frames */ 623 ew32(PBA, pba); 624 625 /* To maintain wire speed transmits, the Tx FIFO should be 626 * large enough to accommodate two full transmit packets, 627 * rounded up to the next 1KB and expressed in KB. Likewise, 628 * the Rx FIFO should be large enough to accommodate at least 629 * one full receive packet and is similarly rounded up and 630 * expressed in KB. */ 631 pba = er32(PBA); 632 /* upper 16 bits has Tx packet buffer allocation size in KB */ 633 tx_space = pba >> 16; 634 /* lower 16 bits has Rx packet buffer allocation size in KB */ 635 pba &= 0xffff; 636 /* 637 * the tx fifo also stores 16 bytes of information about the tx 638 * but don't include ethernet FCS because hardware appends it 639 */ 640 min_tx_space = (hw->max_frame_size + 641 sizeof(struct e1000_tx_desc) - 642 ETH_FCS_LEN) * 2; 643 min_tx_space = ALIGN(min_tx_space, 1024); 644 min_tx_space >>= 10; 645 /* software strips receive CRC, so leave room for it */ 646 min_rx_space = hw->max_frame_size; 647 min_rx_space = ALIGN(min_rx_space, 1024); 648 min_rx_space >>= 10; 649 650 /* If current Tx allocation is less than the min Tx FIFO size, 651 * and the min Tx FIFO size is less than the current Rx FIFO 652 * allocation, take space away from current Rx allocation */ 653 if (tx_space < min_tx_space && 654 ((min_tx_space - tx_space) < pba)) { 655 pba = pba - (min_tx_space - tx_space); 656 657 /* PCI/PCIx hardware has PBA alignment constraints */ 658 switch (hw->mac_type) { 659 case e1000_82545 ... e1000_82546_rev_3: 660 pba &= ~(E1000_PBA_8K - 1); 661 break; 662 default: 663 break; 664 } 665 666 /* if short on rx space, rx wins and must trump tx 667 * adjustment or use Early Receive if available */ 668 if (pba < min_rx_space) 669 pba = min_rx_space; 670 } 671 } 672 673 ew32(PBA, pba); 674 675 /* 676 * flow control settings: 677 * The high water mark must be low enough to fit one full frame 678 * (or the size used for early receive) above it in the Rx FIFO. 679 * Set it to the lower of: 680 * - 90% of the Rx FIFO size, and 681 * - the full Rx FIFO size minus the early receive size (for parts 682 * with ERT support assuming ERT set to E1000_ERT_2048), or 683 * - the full Rx FIFO size minus one full frame 684 */ 685 hwm = min(((pba << 10) * 9 / 10), 686 ((pba << 10) - hw->max_frame_size)); 687 688 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */ 689 hw->fc_low_water = hw->fc_high_water - 8; 690 hw->fc_pause_time = E1000_FC_PAUSE_TIME; 691 hw->fc_send_xon = 1; 692 hw->fc = hw->original_fc; 693 694 /* Allow time for pending master requests to run */ 695 e1000_reset_hw(hw); 696 if (hw->mac_type >= e1000_82544) 697 ew32(WUC, 0); 698 699 if (e1000_init_hw(hw)) 700 e_dev_err("Hardware Error\n"); 701 e1000_update_mng_vlan(adapter); 702 703 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */ 704 if (hw->mac_type >= e1000_82544 && 705 hw->autoneg == 1 && 706 hw->autoneg_advertised == ADVERTISE_1000_FULL) { 707 u32 ctrl = er32(CTRL); 708 /* clear phy power management bit if we are in gig only mode, 709 * which if enabled will attempt negotiation to 100Mb, which 710 * can cause a loss of link at power off or driver unload */ 711 ctrl &= ~E1000_CTRL_SWDPIN3; 712 ew32(CTRL, ctrl); 713 } 714 715 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ 716 ew32(VET, ETHERNET_IEEE_VLAN_TYPE); 717 718 e1000_reset_adaptive(hw); 719 e1000_phy_get_info(hw, &adapter->phy_info); 720 721 e1000_release_manageability(adapter); 722 } 723 724 /* Dump the eeprom for users having checksum issues */ 725 static void e1000_dump_eeprom(struct e1000_adapter *adapter) 726 { 727 struct net_device *netdev = adapter->netdev; 728 struct ethtool_eeprom eeprom; 729 const struct ethtool_ops *ops = netdev->ethtool_ops; 730 u8 *data; 731 int i; 732 u16 csum_old, csum_new = 0; 733 734 eeprom.len = ops->get_eeprom_len(netdev); 735 eeprom.offset = 0; 736 737 data = kmalloc(eeprom.len, GFP_KERNEL); 738 if (!data) 739 return; 740 741 ops->get_eeprom(netdev, &eeprom, data); 742 743 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) + 744 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8); 745 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2) 746 csum_new += data[i] + (data[i + 1] << 8); 747 csum_new = EEPROM_SUM - csum_new; 748 749 pr_err("/*********************/\n"); 750 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old); 751 pr_err("Calculated : 0x%04x\n", csum_new); 752 753 pr_err("Offset Values\n"); 754 pr_err("======== ======\n"); 755 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0); 756 757 pr_err("Include this output when contacting your support provider.\n"); 758 pr_err("This is not a software error! Something bad happened to\n"); 759 pr_err("your hardware or EEPROM image. Ignoring this problem could\n"); 760 pr_err("result in further problems, possibly loss of data,\n"); 761 pr_err("corruption or system hangs!\n"); 762 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n"); 763 pr_err("which is invalid and requires you to set the proper MAC\n"); 764 pr_err("address manually before continuing to enable this network\n"); 765 pr_err("device. Please inspect the EEPROM dump and report the\n"); 766 pr_err("issue to your hardware vendor or Intel Customer Support.\n"); 767 pr_err("/*********************/\n"); 768 769 kfree(data); 770 } 771 772 /** 773 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not 774 * @pdev: PCI device information struct 775 * 776 * Return true if an adapter needs ioport resources 777 **/ 778 static int e1000_is_need_ioport(struct pci_dev *pdev) 779 { 780 switch (pdev->device) { 781 case E1000_DEV_ID_82540EM: 782 case E1000_DEV_ID_82540EM_LOM: 783 case E1000_DEV_ID_82540EP: 784 case E1000_DEV_ID_82540EP_LOM: 785 case E1000_DEV_ID_82540EP_LP: 786 case E1000_DEV_ID_82541EI: 787 case E1000_DEV_ID_82541EI_MOBILE: 788 case E1000_DEV_ID_82541ER: 789 case E1000_DEV_ID_82541ER_LOM: 790 case E1000_DEV_ID_82541GI: 791 case E1000_DEV_ID_82541GI_LF: 792 case E1000_DEV_ID_82541GI_MOBILE: 793 case E1000_DEV_ID_82544EI_COPPER: 794 case E1000_DEV_ID_82544EI_FIBER: 795 case E1000_DEV_ID_82544GC_COPPER: 796 case E1000_DEV_ID_82544GC_LOM: 797 case E1000_DEV_ID_82545EM_COPPER: 798 case E1000_DEV_ID_82545EM_FIBER: 799 case E1000_DEV_ID_82546EB_COPPER: 800 case E1000_DEV_ID_82546EB_FIBER: 801 case E1000_DEV_ID_82546EB_QUAD_COPPER: 802 return true; 803 default: 804 return false; 805 } 806 } 807 808 static netdev_features_t e1000_fix_features(struct net_device *netdev, 809 netdev_features_t features) 810 { 811 /* 812 * Since there is no support for separate rx/tx vlan accel 813 * enable/disable make sure tx flag is always in same state as rx. 814 */ 815 if (features & NETIF_F_HW_VLAN_RX) 816 features |= NETIF_F_HW_VLAN_TX; 817 else 818 features &= ~NETIF_F_HW_VLAN_TX; 819 820 return features; 821 } 822 823 static int e1000_set_features(struct net_device *netdev, 824 netdev_features_t features) 825 { 826 struct e1000_adapter *adapter = netdev_priv(netdev); 827 netdev_features_t changed = features ^ netdev->features; 828 829 if (changed & NETIF_F_HW_VLAN_RX) 830 e1000_vlan_mode(netdev, features); 831 832 if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL))) 833 return 0; 834 835 netdev->features = features; 836 adapter->rx_csum = !!(features & NETIF_F_RXCSUM); 837 838 if (netif_running(netdev)) 839 e1000_reinit_locked(adapter); 840 else 841 e1000_reset(adapter); 842 843 return 0; 844 } 845 846 static const struct net_device_ops e1000_netdev_ops = { 847 .ndo_open = e1000_open, 848 .ndo_stop = e1000_close, 849 .ndo_start_xmit = e1000_xmit_frame, 850 .ndo_get_stats = e1000_get_stats, 851 .ndo_set_rx_mode = e1000_set_rx_mode, 852 .ndo_set_mac_address = e1000_set_mac, 853 .ndo_tx_timeout = e1000_tx_timeout, 854 .ndo_change_mtu = e1000_change_mtu, 855 .ndo_do_ioctl = e1000_ioctl, 856 .ndo_validate_addr = eth_validate_addr, 857 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid, 858 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid, 859 #ifdef CONFIG_NET_POLL_CONTROLLER 860 .ndo_poll_controller = e1000_netpoll, 861 #endif 862 .ndo_fix_features = e1000_fix_features, 863 .ndo_set_features = e1000_set_features, 864 }; 865 866 /** 867 * e1000_init_hw_struct - initialize members of hw struct 868 * @adapter: board private struct 869 * @hw: structure used by e1000_hw.c 870 * 871 * Factors out initialization of the e1000_hw struct to its own function 872 * that can be called very early at init (just after struct allocation). 873 * Fields are initialized based on PCI device information and 874 * OS network device settings (MTU size). 875 * Returns negative error codes if MAC type setup fails. 876 */ 877 static int e1000_init_hw_struct(struct e1000_adapter *adapter, 878 struct e1000_hw *hw) 879 { 880 struct pci_dev *pdev = adapter->pdev; 881 882 /* PCI config space info */ 883 hw->vendor_id = pdev->vendor; 884 hw->device_id = pdev->device; 885 hw->subsystem_vendor_id = pdev->subsystem_vendor; 886 hw->subsystem_id = pdev->subsystem_device; 887 hw->revision_id = pdev->revision; 888 889 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word); 890 891 hw->max_frame_size = adapter->netdev->mtu + 892 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; 893 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE; 894 895 /* identify the MAC */ 896 if (e1000_set_mac_type(hw)) { 897 e_err(probe, "Unknown MAC Type\n"); 898 return -EIO; 899 } 900 901 switch (hw->mac_type) { 902 default: 903 break; 904 case e1000_82541: 905 case e1000_82547: 906 case e1000_82541_rev_2: 907 case e1000_82547_rev_2: 908 hw->phy_init_script = 1; 909 break; 910 } 911 912 e1000_set_media_type(hw); 913 e1000_get_bus_info(hw); 914 915 hw->wait_autoneg_complete = false; 916 hw->tbi_compatibility_en = true; 917 hw->adaptive_ifs = true; 918 919 /* Copper options */ 920 921 if (hw->media_type == e1000_media_type_copper) { 922 hw->mdix = AUTO_ALL_MODES; 923 hw->disable_polarity_correction = false; 924 hw->master_slave = E1000_MASTER_SLAVE; 925 } 926 927 return 0; 928 } 929 930 /** 931 * e1000_probe - Device Initialization Routine 932 * @pdev: PCI device information struct 933 * @ent: entry in e1000_pci_tbl 934 * 935 * Returns 0 on success, negative on failure 936 * 937 * e1000_probe initializes an adapter identified by a pci_dev structure. 938 * The OS initialization, configuring of the adapter private structure, 939 * and a hardware reset occur. 940 **/ 941 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 942 { 943 struct net_device *netdev; 944 struct e1000_adapter *adapter; 945 struct e1000_hw *hw; 946 947 static int cards_found = 0; 948 static int global_quad_port_a = 0; /* global ksp3 port a indication */ 949 int i, err, pci_using_dac; 950 u16 eeprom_data = 0; 951 u16 tmp = 0; 952 u16 eeprom_apme_mask = E1000_EEPROM_APME; 953 int bars, need_ioport; 954 955 /* do not allocate ioport bars when not needed */ 956 need_ioport = e1000_is_need_ioport(pdev); 957 if (need_ioport) { 958 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO); 959 err = pci_enable_device(pdev); 960 } else { 961 bars = pci_select_bars(pdev, IORESOURCE_MEM); 962 err = pci_enable_device_mem(pdev); 963 } 964 if (err) 965 return err; 966 967 err = pci_request_selected_regions(pdev, bars, e1000_driver_name); 968 if (err) 969 goto err_pci_reg; 970 971 pci_set_master(pdev); 972 err = pci_save_state(pdev); 973 if (err) 974 goto err_alloc_etherdev; 975 976 err = -ENOMEM; 977 netdev = alloc_etherdev(sizeof(struct e1000_adapter)); 978 if (!netdev) 979 goto err_alloc_etherdev; 980 981 SET_NETDEV_DEV(netdev, &pdev->dev); 982 983 pci_set_drvdata(pdev, netdev); 984 adapter = netdev_priv(netdev); 985 adapter->netdev = netdev; 986 adapter->pdev = pdev; 987 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 988 adapter->bars = bars; 989 adapter->need_ioport = need_ioport; 990 991 hw = &adapter->hw; 992 hw->back = adapter; 993 994 err = -EIO; 995 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0); 996 if (!hw->hw_addr) 997 goto err_ioremap; 998 999 if (adapter->need_ioport) { 1000 for (i = BAR_1; i <= BAR_5; i++) { 1001 if (pci_resource_len(pdev, i) == 0) 1002 continue; 1003 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { 1004 hw->io_base = pci_resource_start(pdev, i); 1005 break; 1006 } 1007 } 1008 } 1009 1010 /* make ready for any if (hw->...) below */ 1011 err = e1000_init_hw_struct(adapter, hw); 1012 if (err) 1013 goto err_sw_init; 1014 1015 /* 1016 * there is a workaround being applied below that limits 1017 * 64-bit DMA addresses to 64-bit hardware. There are some 1018 * 32-bit adapters that Tx hang when given 64-bit DMA addresses 1019 */ 1020 pci_using_dac = 0; 1021 if ((hw->bus_type == e1000_bus_type_pcix) && 1022 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) { 1023 /* 1024 * according to DMA-API-HOWTO, coherent calls will always 1025 * succeed if the set call did 1026 */ 1027 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 1028 pci_using_dac = 1; 1029 } else { 1030 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1031 if (err) { 1032 pr_err("No usable DMA config, aborting\n"); 1033 goto err_dma; 1034 } 1035 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 1036 } 1037 1038 netdev->netdev_ops = &e1000_netdev_ops; 1039 e1000_set_ethtool_ops(netdev); 1040 netdev->watchdog_timeo = 5 * HZ; 1041 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64); 1042 1043 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); 1044 1045 adapter->bd_number = cards_found; 1046 1047 /* setup the private structure */ 1048 1049 err = e1000_sw_init(adapter); 1050 if (err) 1051 goto err_sw_init; 1052 1053 err = -EIO; 1054 if (hw->mac_type == e1000_ce4100) { 1055 hw->ce4100_gbe_mdio_base_virt = 1056 ioremap(pci_resource_start(pdev, BAR_1), 1057 pci_resource_len(pdev, BAR_1)); 1058 1059 if (!hw->ce4100_gbe_mdio_base_virt) 1060 goto err_mdio_ioremap; 1061 } 1062 1063 if (hw->mac_type >= e1000_82543) { 1064 netdev->hw_features = NETIF_F_SG | 1065 NETIF_F_HW_CSUM | 1066 NETIF_F_HW_VLAN_RX; 1067 netdev->features = NETIF_F_HW_VLAN_TX | 1068 NETIF_F_HW_VLAN_FILTER; 1069 } 1070 1071 if ((hw->mac_type >= e1000_82544) && 1072 (hw->mac_type != e1000_82547)) 1073 netdev->hw_features |= NETIF_F_TSO; 1074 1075 netdev->priv_flags |= IFF_SUPP_NOFCS; 1076 1077 netdev->features |= netdev->hw_features; 1078 netdev->hw_features |= (NETIF_F_RXCSUM | 1079 NETIF_F_RXALL | 1080 NETIF_F_RXFCS); 1081 1082 if (pci_using_dac) { 1083 netdev->features |= NETIF_F_HIGHDMA; 1084 netdev->vlan_features |= NETIF_F_HIGHDMA; 1085 } 1086 1087 netdev->vlan_features |= (NETIF_F_TSO | 1088 NETIF_F_HW_CSUM | 1089 NETIF_F_SG); 1090 1091 netdev->priv_flags |= IFF_UNICAST_FLT; 1092 1093 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw); 1094 1095 /* initialize eeprom parameters */ 1096 if (e1000_init_eeprom_params(hw)) { 1097 e_err(probe, "EEPROM initialization failed\n"); 1098 goto err_eeprom; 1099 } 1100 1101 /* before reading the EEPROM, reset the controller to 1102 * put the device in a known good starting state */ 1103 1104 e1000_reset_hw(hw); 1105 1106 /* make sure the EEPROM is good */ 1107 if (e1000_validate_eeprom_checksum(hw) < 0) { 1108 e_err(probe, "The EEPROM Checksum Is Not Valid\n"); 1109 e1000_dump_eeprom(adapter); 1110 /* 1111 * set MAC address to all zeroes to invalidate and temporary 1112 * disable this device for the user. This blocks regular 1113 * traffic while still permitting ethtool ioctls from reaching 1114 * the hardware as well as allowing the user to run the 1115 * interface after manually setting a hw addr using 1116 * `ip set address` 1117 */ 1118 memset(hw->mac_addr, 0, netdev->addr_len); 1119 } else { 1120 /* copy the MAC address out of the EEPROM */ 1121 if (e1000_read_mac_addr(hw)) 1122 e_err(probe, "EEPROM Read Error\n"); 1123 } 1124 /* don't block initalization here due to bad MAC address */ 1125 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len); 1126 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len); 1127 1128 if (!is_valid_ether_addr(netdev->perm_addr)) 1129 e_err(probe, "Invalid MAC Address\n"); 1130 1131 1132 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog); 1133 INIT_DELAYED_WORK(&adapter->fifo_stall_task, 1134 e1000_82547_tx_fifo_stall_task); 1135 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task); 1136 INIT_WORK(&adapter->reset_task, e1000_reset_task); 1137 1138 e1000_check_options(adapter); 1139 1140 /* Initial Wake on LAN setting 1141 * If APM wake is enabled in the EEPROM, 1142 * enable the ACPI Magic Packet filter 1143 */ 1144 1145 switch (hw->mac_type) { 1146 case e1000_82542_rev2_0: 1147 case e1000_82542_rev2_1: 1148 case e1000_82543: 1149 break; 1150 case e1000_82544: 1151 e1000_read_eeprom(hw, 1152 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data); 1153 eeprom_apme_mask = E1000_EEPROM_82544_APM; 1154 break; 1155 case e1000_82546: 1156 case e1000_82546_rev_3: 1157 if (er32(STATUS) & E1000_STATUS_FUNC_1){ 1158 e1000_read_eeprom(hw, 1159 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); 1160 break; 1161 } 1162 /* Fall Through */ 1163 default: 1164 e1000_read_eeprom(hw, 1165 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data); 1166 break; 1167 } 1168 if (eeprom_data & eeprom_apme_mask) 1169 adapter->eeprom_wol |= E1000_WUFC_MAG; 1170 1171 /* now that we have the eeprom settings, apply the special cases 1172 * where the eeprom may be wrong or the board simply won't support 1173 * wake on lan on a particular port */ 1174 switch (pdev->device) { 1175 case E1000_DEV_ID_82546GB_PCIE: 1176 adapter->eeprom_wol = 0; 1177 break; 1178 case E1000_DEV_ID_82546EB_FIBER: 1179 case E1000_DEV_ID_82546GB_FIBER: 1180 /* Wake events only supported on port A for dual fiber 1181 * regardless of eeprom setting */ 1182 if (er32(STATUS) & E1000_STATUS_FUNC_1) 1183 adapter->eeprom_wol = 0; 1184 break; 1185 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3: 1186 /* if quad port adapter, disable WoL on all but port A */ 1187 if (global_quad_port_a != 0) 1188 adapter->eeprom_wol = 0; 1189 else 1190 adapter->quad_port_a = true; 1191 /* Reset for multiple quad port adapters */ 1192 if (++global_quad_port_a == 4) 1193 global_quad_port_a = 0; 1194 break; 1195 } 1196 1197 /* initialize the wol settings based on the eeprom settings */ 1198 adapter->wol = adapter->eeprom_wol; 1199 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol); 1200 1201 /* Auto detect PHY address */ 1202 if (hw->mac_type == e1000_ce4100) { 1203 for (i = 0; i < 32; i++) { 1204 hw->phy_addr = i; 1205 e1000_read_phy_reg(hw, PHY_ID2, &tmp); 1206 if (tmp == 0 || tmp == 0xFF) { 1207 if (i == 31) 1208 goto err_eeprom; 1209 continue; 1210 } else 1211 break; 1212 } 1213 } 1214 1215 /* reset the hardware with the new settings */ 1216 e1000_reset(adapter); 1217 1218 strcpy(netdev->name, "eth%d"); 1219 err = register_netdev(netdev); 1220 if (err) 1221 goto err_register; 1222 1223 e1000_vlan_filter_on_off(adapter, false); 1224 1225 /* print bus type/speed/width info */ 1226 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n", 1227 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""), 1228 ((hw->bus_speed == e1000_bus_speed_133) ? 133 : 1229 (hw->bus_speed == e1000_bus_speed_120) ? 120 : 1230 (hw->bus_speed == e1000_bus_speed_100) ? 100 : 1231 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33), 1232 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32), 1233 netdev->dev_addr); 1234 1235 /* carrier off reporting is important to ethtool even BEFORE open */ 1236 netif_carrier_off(netdev); 1237 1238 e_info(probe, "Intel(R) PRO/1000 Network Connection\n"); 1239 1240 cards_found++; 1241 return 0; 1242 1243 err_register: 1244 err_eeprom: 1245 e1000_phy_hw_reset(hw); 1246 1247 if (hw->flash_address) 1248 iounmap(hw->flash_address); 1249 kfree(adapter->tx_ring); 1250 kfree(adapter->rx_ring); 1251 err_dma: 1252 err_sw_init: 1253 err_mdio_ioremap: 1254 iounmap(hw->ce4100_gbe_mdio_base_virt); 1255 iounmap(hw->hw_addr); 1256 err_ioremap: 1257 free_netdev(netdev); 1258 err_alloc_etherdev: 1259 pci_release_selected_regions(pdev, bars); 1260 err_pci_reg: 1261 pci_disable_device(pdev); 1262 return err; 1263 } 1264 1265 /** 1266 * e1000_remove - Device Removal Routine 1267 * @pdev: PCI device information struct 1268 * 1269 * e1000_remove is called by the PCI subsystem to alert the driver 1270 * that it should release a PCI device. The could be caused by a 1271 * Hot-Plug event, or because the driver is going to be removed from 1272 * memory. 1273 **/ 1274 1275 static void e1000_remove(struct pci_dev *pdev) 1276 { 1277 struct net_device *netdev = pci_get_drvdata(pdev); 1278 struct e1000_adapter *adapter = netdev_priv(netdev); 1279 struct e1000_hw *hw = &adapter->hw; 1280 1281 e1000_down_and_stop(adapter); 1282 e1000_release_manageability(adapter); 1283 1284 unregister_netdev(netdev); 1285 1286 e1000_phy_hw_reset(hw); 1287 1288 kfree(adapter->tx_ring); 1289 kfree(adapter->rx_ring); 1290 1291 if (hw->mac_type == e1000_ce4100) 1292 iounmap(hw->ce4100_gbe_mdio_base_virt); 1293 iounmap(hw->hw_addr); 1294 if (hw->flash_address) 1295 iounmap(hw->flash_address); 1296 pci_release_selected_regions(pdev, adapter->bars); 1297 1298 free_netdev(netdev); 1299 1300 pci_disable_device(pdev); 1301 } 1302 1303 /** 1304 * e1000_sw_init - Initialize general software structures (struct e1000_adapter) 1305 * @adapter: board private structure to initialize 1306 * 1307 * e1000_sw_init initializes the Adapter private data structure. 1308 * e1000_init_hw_struct MUST be called before this function 1309 **/ 1310 1311 static int e1000_sw_init(struct e1000_adapter *adapter) 1312 { 1313 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; 1314 1315 adapter->num_tx_queues = 1; 1316 adapter->num_rx_queues = 1; 1317 1318 if (e1000_alloc_queues(adapter)) { 1319 e_err(probe, "Unable to allocate memory for queues\n"); 1320 return -ENOMEM; 1321 } 1322 1323 /* Explicitly disable IRQ since the NIC can be in any state. */ 1324 e1000_irq_disable(adapter); 1325 1326 spin_lock_init(&adapter->stats_lock); 1327 mutex_init(&adapter->mutex); 1328 1329 set_bit(__E1000_DOWN, &adapter->flags); 1330 1331 return 0; 1332 } 1333 1334 /** 1335 * e1000_alloc_queues - Allocate memory for all rings 1336 * @adapter: board private structure to initialize 1337 * 1338 * We allocate one ring per queue at run-time since we don't know the 1339 * number of queues at compile-time. 1340 **/ 1341 1342 static int e1000_alloc_queues(struct e1000_adapter *adapter) 1343 { 1344 adapter->tx_ring = kcalloc(adapter->num_tx_queues, 1345 sizeof(struct e1000_tx_ring), GFP_KERNEL); 1346 if (!adapter->tx_ring) 1347 return -ENOMEM; 1348 1349 adapter->rx_ring = kcalloc(adapter->num_rx_queues, 1350 sizeof(struct e1000_rx_ring), GFP_KERNEL); 1351 if (!adapter->rx_ring) { 1352 kfree(adapter->tx_ring); 1353 return -ENOMEM; 1354 } 1355 1356 return E1000_SUCCESS; 1357 } 1358 1359 /** 1360 * e1000_open - Called when a network interface is made active 1361 * @netdev: network interface device structure 1362 * 1363 * Returns 0 on success, negative value on failure 1364 * 1365 * The open entry point is called when a network interface is made 1366 * active by the system (IFF_UP). At this point all resources needed 1367 * for transmit and receive operations are allocated, the interrupt 1368 * handler is registered with the OS, the watchdog task is started, 1369 * and the stack is notified that the interface is ready. 1370 **/ 1371 1372 static int e1000_open(struct net_device *netdev) 1373 { 1374 struct e1000_adapter *adapter = netdev_priv(netdev); 1375 struct e1000_hw *hw = &adapter->hw; 1376 int err; 1377 1378 /* disallow open during test */ 1379 if (test_bit(__E1000_TESTING, &adapter->flags)) 1380 return -EBUSY; 1381 1382 netif_carrier_off(netdev); 1383 1384 /* allocate transmit descriptors */ 1385 err = e1000_setup_all_tx_resources(adapter); 1386 if (err) 1387 goto err_setup_tx; 1388 1389 /* allocate receive descriptors */ 1390 err = e1000_setup_all_rx_resources(adapter); 1391 if (err) 1392 goto err_setup_rx; 1393 1394 e1000_power_up_phy(adapter); 1395 1396 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; 1397 if ((hw->mng_cookie.status & 1398 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) { 1399 e1000_update_mng_vlan(adapter); 1400 } 1401 1402 /* before we allocate an interrupt, we must be ready to handle it. 1403 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt 1404 * as soon as we call pci_request_irq, so we have to setup our 1405 * clean_rx handler before we do so. */ 1406 e1000_configure(adapter); 1407 1408 err = e1000_request_irq(adapter); 1409 if (err) 1410 goto err_req_irq; 1411 1412 /* From here on the code is the same as e1000_up() */ 1413 clear_bit(__E1000_DOWN, &adapter->flags); 1414 1415 napi_enable(&adapter->napi); 1416 1417 e1000_irq_enable(adapter); 1418 1419 netif_start_queue(netdev); 1420 1421 /* fire a link status change interrupt to start the watchdog */ 1422 ew32(ICS, E1000_ICS_LSC); 1423 1424 return E1000_SUCCESS; 1425 1426 err_req_irq: 1427 e1000_power_down_phy(adapter); 1428 e1000_free_all_rx_resources(adapter); 1429 err_setup_rx: 1430 e1000_free_all_tx_resources(adapter); 1431 err_setup_tx: 1432 e1000_reset(adapter); 1433 1434 return err; 1435 } 1436 1437 /** 1438 * e1000_close - Disables a network interface 1439 * @netdev: network interface device structure 1440 * 1441 * Returns 0, this is not allowed to fail 1442 * 1443 * The close entry point is called when an interface is de-activated 1444 * by the OS. The hardware is still under the drivers control, but 1445 * needs to be disabled. A global MAC reset is issued to stop the 1446 * hardware, and all transmit and receive resources are freed. 1447 **/ 1448 1449 static int e1000_close(struct net_device *netdev) 1450 { 1451 struct e1000_adapter *adapter = netdev_priv(netdev); 1452 struct e1000_hw *hw = &adapter->hw; 1453 1454 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); 1455 e1000_down(adapter); 1456 e1000_power_down_phy(adapter); 1457 e1000_free_irq(adapter); 1458 1459 e1000_free_all_tx_resources(adapter); 1460 e1000_free_all_rx_resources(adapter); 1461 1462 /* kill manageability vlan ID if supported, but not if a vlan with 1463 * the same ID is registered on the host OS (let 8021q kill it) */ 1464 if ((hw->mng_cookie.status & 1465 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && 1466 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) { 1467 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id); 1468 } 1469 1470 return 0; 1471 } 1472 1473 /** 1474 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary 1475 * @adapter: address of board private structure 1476 * @start: address of beginning of memory 1477 * @len: length of memory 1478 **/ 1479 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start, 1480 unsigned long len) 1481 { 1482 struct e1000_hw *hw = &adapter->hw; 1483 unsigned long begin = (unsigned long)start; 1484 unsigned long end = begin + len; 1485 1486 /* First rev 82545 and 82546 need to not allow any memory 1487 * write location to cross 64k boundary due to errata 23 */ 1488 if (hw->mac_type == e1000_82545 || 1489 hw->mac_type == e1000_ce4100 || 1490 hw->mac_type == e1000_82546) { 1491 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true; 1492 } 1493 1494 return true; 1495 } 1496 1497 /** 1498 * e1000_setup_tx_resources - allocate Tx resources (Descriptors) 1499 * @adapter: board private structure 1500 * @txdr: tx descriptor ring (for a specific queue) to setup 1501 * 1502 * Return 0 on success, negative on failure 1503 **/ 1504 1505 static int e1000_setup_tx_resources(struct e1000_adapter *adapter, 1506 struct e1000_tx_ring *txdr) 1507 { 1508 struct pci_dev *pdev = adapter->pdev; 1509 int size; 1510 1511 size = sizeof(struct e1000_buffer) * txdr->count; 1512 txdr->buffer_info = vzalloc(size); 1513 if (!txdr->buffer_info) { 1514 e_err(probe, "Unable to allocate memory for the Tx descriptor " 1515 "ring\n"); 1516 return -ENOMEM; 1517 } 1518 1519 /* round up to nearest 4K */ 1520 1521 txdr->size = txdr->count * sizeof(struct e1000_tx_desc); 1522 txdr->size = ALIGN(txdr->size, 4096); 1523 1524 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, 1525 GFP_KERNEL); 1526 if (!txdr->desc) { 1527 setup_tx_desc_die: 1528 vfree(txdr->buffer_info); 1529 e_err(probe, "Unable to allocate memory for the Tx descriptor " 1530 "ring\n"); 1531 return -ENOMEM; 1532 } 1533 1534 /* Fix for errata 23, can't cross 64kB boundary */ 1535 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { 1536 void *olddesc = txdr->desc; 1537 dma_addr_t olddma = txdr->dma; 1538 e_err(tx_err, "txdr align check failed: %u bytes at %p\n", 1539 txdr->size, txdr->desc); 1540 /* Try again, without freeing the previous */ 1541 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, 1542 &txdr->dma, GFP_KERNEL); 1543 /* Failed allocation, critical failure */ 1544 if (!txdr->desc) { 1545 dma_free_coherent(&pdev->dev, txdr->size, olddesc, 1546 olddma); 1547 goto setup_tx_desc_die; 1548 } 1549 1550 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { 1551 /* give up */ 1552 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc, 1553 txdr->dma); 1554 dma_free_coherent(&pdev->dev, txdr->size, olddesc, 1555 olddma); 1556 e_err(probe, "Unable to allocate aligned memory " 1557 "for the transmit descriptor ring\n"); 1558 vfree(txdr->buffer_info); 1559 return -ENOMEM; 1560 } else { 1561 /* Free old allocation, new allocation was successful */ 1562 dma_free_coherent(&pdev->dev, txdr->size, olddesc, 1563 olddma); 1564 } 1565 } 1566 memset(txdr->desc, 0, txdr->size); 1567 1568 txdr->next_to_use = 0; 1569 txdr->next_to_clean = 0; 1570 1571 return 0; 1572 } 1573 1574 /** 1575 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources 1576 * (Descriptors) for all queues 1577 * @adapter: board private structure 1578 * 1579 * Return 0 on success, negative on failure 1580 **/ 1581 1582 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter) 1583 { 1584 int i, err = 0; 1585 1586 for (i = 0; i < adapter->num_tx_queues; i++) { 1587 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]); 1588 if (err) { 1589 e_err(probe, "Allocation for Tx Queue %u failed\n", i); 1590 for (i-- ; i >= 0; i--) 1591 e1000_free_tx_resources(adapter, 1592 &adapter->tx_ring[i]); 1593 break; 1594 } 1595 } 1596 1597 return err; 1598 } 1599 1600 /** 1601 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset 1602 * @adapter: board private structure 1603 * 1604 * Configure the Tx unit of the MAC after a reset. 1605 **/ 1606 1607 static void e1000_configure_tx(struct e1000_adapter *adapter) 1608 { 1609 u64 tdba; 1610 struct e1000_hw *hw = &adapter->hw; 1611 u32 tdlen, tctl, tipg; 1612 u32 ipgr1, ipgr2; 1613 1614 /* Setup the HW Tx Head and Tail descriptor pointers */ 1615 1616 switch (adapter->num_tx_queues) { 1617 case 1: 1618 default: 1619 tdba = adapter->tx_ring[0].dma; 1620 tdlen = adapter->tx_ring[0].count * 1621 sizeof(struct e1000_tx_desc); 1622 ew32(TDLEN, tdlen); 1623 ew32(TDBAH, (tdba >> 32)); 1624 ew32(TDBAL, (tdba & 0x00000000ffffffffULL)); 1625 ew32(TDT, 0); 1626 ew32(TDH, 0); 1627 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH); 1628 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT); 1629 break; 1630 } 1631 1632 /* Set the default values for the Tx Inter Packet Gap timer */ 1633 if ((hw->media_type == e1000_media_type_fiber || 1634 hw->media_type == e1000_media_type_internal_serdes)) 1635 tipg = DEFAULT_82543_TIPG_IPGT_FIBER; 1636 else 1637 tipg = DEFAULT_82543_TIPG_IPGT_COPPER; 1638 1639 switch (hw->mac_type) { 1640 case e1000_82542_rev2_0: 1641 case e1000_82542_rev2_1: 1642 tipg = DEFAULT_82542_TIPG_IPGT; 1643 ipgr1 = DEFAULT_82542_TIPG_IPGR1; 1644 ipgr2 = DEFAULT_82542_TIPG_IPGR2; 1645 break; 1646 default: 1647 ipgr1 = DEFAULT_82543_TIPG_IPGR1; 1648 ipgr2 = DEFAULT_82543_TIPG_IPGR2; 1649 break; 1650 } 1651 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT; 1652 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT; 1653 ew32(TIPG, tipg); 1654 1655 /* Set the Tx Interrupt Delay register */ 1656 1657 ew32(TIDV, adapter->tx_int_delay); 1658 if (hw->mac_type >= e1000_82540) 1659 ew32(TADV, adapter->tx_abs_int_delay); 1660 1661 /* Program the Transmit Control Register */ 1662 1663 tctl = er32(TCTL); 1664 tctl &= ~E1000_TCTL_CT; 1665 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | 1666 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); 1667 1668 e1000_config_collision_dist(hw); 1669 1670 /* Setup Transmit Descriptor Settings for eop descriptor */ 1671 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; 1672 1673 /* only set IDE if we are delaying interrupts using the timers */ 1674 if (adapter->tx_int_delay) 1675 adapter->txd_cmd |= E1000_TXD_CMD_IDE; 1676 1677 if (hw->mac_type < e1000_82543) 1678 adapter->txd_cmd |= E1000_TXD_CMD_RPS; 1679 else 1680 adapter->txd_cmd |= E1000_TXD_CMD_RS; 1681 1682 /* Cache if we're 82544 running in PCI-X because we'll 1683 * need this to apply a workaround later in the send path. */ 1684 if (hw->mac_type == e1000_82544 && 1685 hw->bus_type == e1000_bus_type_pcix) 1686 adapter->pcix_82544 = true; 1687 1688 ew32(TCTL, tctl); 1689 1690 } 1691 1692 /** 1693 * e1000_setup_rx_resources - allocate Rx resources (Descriptors) 1694 * @adapter: board private structure 1695 * @rxdr: rx descriptor ring (for a specific queue) to setup 1696 * 1697 * Returns 0 on success, negative on failure 1698 **/ 1699 1700 static int e1000_setup_rx_resources(struct e1000_adapter *adapter, 1701 struct e1000_rx_ring *rxdr) 1702 { 1703 struct pci_dev *pdev = adapter->pdev; 1704 int size, desc_len; 1705 1706 size = sizeof(struct e1000_buffer) * rxdr->count; 1707 rxdr->buffer_info = vzalloc(size); 1708 if (!rxdr->buffer_info) { 1709 e_err(probe, "Unable to allocate memory for the Rx descriptor " 1710 "ring\n"); 1711 return -ENOMEM; 1712 } 1713 1714 desc_len = sizeof(struct e1000_rx_desc); 1715 1716 /* Round up to nearest 4K */ 1717 1718 rxdr->size = rxdr->count * desc_len; 1719 rxdr->size = ALIGN(rxdr->size, 4096); 1720 1721 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, 1722 GFP_KERNEL); 1723 1724 if (!rxdr->desc) { 1725 e_err(probe, "Unable to allocate memory for the Rx descriptor " 1726 "ring\n"); 1727 setup_rx_desc_die: 1728 vfree(rxdr->buffer_info); 1729 return -ENOMEM; 1730 } 1731 1732 /* Fix for errata 23, can't cross 64kB boundary */ 1733 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { 1734 void *olddesc = rxdr->desc; 1735 dma_addr_t olddma = rxdr->dma; 1736 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n", 1737 rxdr->size, rxdr->desc); 1738 /* Try again, without freeing the previous */ 1739 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, 1740 &rxdr->dma, GFP_KERNEL); 1741 /* Failed allocation, critical failure */ 1742 if (!rxdr->desc) { 1743 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, 1744 olddma); 1745 e_err(probe, "Unable to allocate memory for the Rx " 1746 "descriptor ring\n"); 1747 goto setup_rx_desc_die; 1748 } 1749 1750 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { 1751 /* give up */ 1752 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc, 1753 rxdr->dma); 1754 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, 1755 olddma); 1756 e_err(probe, "Unable to allocate aligned memory for " 1757 "the Rx descriptor ring\n"); 1758 goto setup_rx_desc_die; 1759 } else { 1760 /* Free old allocation, new allocation was successful */ 1761 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, 1762 olddma); 1763 } 1764 } 1765 memset(rxdr->desc, 0, rxdr->size); 1766 1767 rxdr->next_to_clean = 0; 1768 rxdr->next_to_use = 0; 1769 rxdr->rx_skb_top = NULL; 1770 1771 return 0; 1772 } 1773 1774 /** 1775 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources 1776 * (Descriptors) for all queues 1777 * @adapter: board private structure 1778 * 1779 * Return 0 on success, negative on failure 1780 **/ 1781 1782 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter) 1783 { 1784 int i, err = 0; 1785 1786 for (i = 0; i < adapter->num_rx_queues; i++) { 1787 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]); 1788 if (err) { 1789 e_err(probe, "Allocation for Rx Queue %u failed\n", i); 1790 for (i-- ; i >= 0; i--) 1791 e1000_free_rx_resources(adapter, 1792 &adapter->rx_ring[i]); 1793 break; 1794 } 1795 } 1796 1797 return err; 1798 } 1799 1800 /** 1801 * e1000_setup_rctl - configure the receive control registers 1802 * @adapter: Board private structure 1803 **/ 1804 static void e1000_setup_rctl(struct e1000_adapter *adapter) 1805 { 1806 struct e1000_hw *hw = &adapter->hw; 1807 u32 rctl; 1808 1809 rctl = er32(RCTL); 1810 1811 rctl &= ~(3 << E1000_RCTL_MO_SHIFT); 1812 1813 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO | 1814 E1000_RCTL_RDMTS_HALF | 1815 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT); 1816 1817 if (hw->tbi_compatibility_on == 1) 1818 rctl |= E1000_RCTL_SBP; 1819 else 1820 rctl &= ~E1000_RCTL_SBP; 1821 1822 if (adapter->netdev->mtu <= ETH_DATA_LEN) 1823 rctl &= ~E1000_RCTL_LPE; 1824 else 1825 rctl |= E1000_RCTL_LPE; 1826 1827 /* Setup buffer sizes */ 1828 rctl &= ~E1000_RCTL_SZ_4096; 1829 rctl |= E1000_RCTL_BSEX; 1830 switch (adapter->rx_buffer_len) { 1831 case E1000_RXBUFFER_2048: 1832 default: 1833 rctl |= E1000_RCTL_SZ_2048; 1834 rctl &= ~E1000_RCTL_BSEX; 1835 break; 1836 case E1000_RXBUFFER_4096: 1837 rctl |= E1000_RCTL_SZ_4096; 1838 break; 1839 case E1000_RXBUFFER_8192: 1840 rctl |= E1000_RCTL_SZ_8192; 1841 break; 1842 case E1000_RXBUFFER_16384: 1843 rctl |= E1000_RCTL_SZ_16384; 1844 break; 1845 } 1846 1847 /* This is useful for sniffing bad packets. */ 1848 if (adapter->netdev->features & NETIF_F_RXALL) { 1849 /* UPE and MPE will be handled by normal PROMISC logic 1850 * in e1000e_set_rx_mode */ 1851 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */ 1852 E1000_RCTL_BAM | /* RX All Bcast Pkts */ 1853 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */ 1854 1855 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */ 1856 E1000_RCTL_DPF | /* Allow filtered pause */ 1857 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */ 1858 /* Do not mess with E1000_CTRL_VME, it affects transmit as well, 1859 * and that breaks VLANs. 1860 */ 1861 } 1862 1863 ew32(RCTL, rctl); 1864 } 1865 1866 /** 1867 * e1000_configure_rx - Configure 8254x Receive Unit after Reset 1868 * @adapter: board private structure 1869 * 1870 * Configure the Rx unit of the MAC after a reset. 1871 **/ 1872 1873 static void e1000_configure_rx(struct e1000_adapter *adapter) 1874 { 1875 u64 rdba; 1876 struct e1000_hw *hw = &adapter->hw; 1877 u32 rdlen, rctl, rxcsum; 1878 1879 if (adapter->netdev->mtu > ETH_DATA_LEN) { 1880 rdlen = adapter->rx_ring[0].count * 1881 sizeof(struct e1000_rx_desc); 1882 adapter->clean_rx = e1000_clean_jumbo_rx_irq; 1883 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers; 1884 } else { 1885 rdlen = adapter->rx_ring[0].count * 1886 sizeof(struct e1000_rx_desc); 1887 adapter->clean_rx = e1000_clean_rx_irq; 1888 adapter->alloc_rx_buf = e1000_alloc_rx_buffers; 1889 } 1890 1891 /* disable receives while setting up the descriptors */ 1892 rctl = er32(RCTL); 1893 ew32(RCTL, rctl & ~E1000_RCTL_EN); 1894 1895 /* set the Receive Delay Timer Register */ 1896 ew32(RDTR, adapter->rx_int_delay); 1897 1898 if (hw->mac_type >= e1000_82540) { 1899 ew32(RADV, adapter->rx_abs_int_delay); 1900 if (adapter->itr_setting != 0) 1901 ew32(ITR, 1000000000 / (adapter->itr * 256)); 1902 } 1903 1904 /* Setup the HW Rx Head and Tail Descriptor Pointers and 1905 * the Base and Length of the Rx Descriptor Ring */ 1906 switch (adapter->num_rx_queues) { 1907 case 1: 1908 default: 1909 rdba = adapter->rx_ring[0].dma; 1910 ew32(RDLEN, rdlen); 1911 ew32(RDBAH, (rdba >> 32)); 1912 ew32(RDBAL, (rdba & 0x00000000ffffffffULL)); 1913 ew32(RDT, 0); 1914 ew32(RDH, 0); 1915 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH); 1916 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT); 1917 break; 1918 } 1919 1920 /* Enable 82543 Receive Checksum Offload for TCP and UDP */ 1921 if (hw->mac_type >= e1000_82543) { 1922 rxcsum = er32(RXCSUM); 1923 if (adapter->rx_csum) 1924 rxcsum |= E1000_RXCSUM_TUOFL; 1925 else 1926 /* don't need to clear IPPCSE as it defaults to 0 */ 1927 rxcsum &= ~E1000_RXCSUM_TUOFL; 1928 ew32(RXCSUM, rxcsum); 1929 } 1930 1931 /* Enable Receives */ 1932 ew32(RCTL, rctl | E1000_RCTL_EN); 1933 } 1934 1935 /** 1936 * e1000_free_tx_resources - Free Tx Resources per Queue 1937 * @adapter: board private structure 1938 * @tx_ring: Tx descriptor ring for a specific queue 1939 * 1940 * Free all transmit software resources 1941 **/ 1942 1943 static void e1000_free_tx_resources(struct e1000_adapter *adapter, 1944 struct e1000_tx_ring *tx_ring) 1945 { 1946 struct pci_dev *pdev = adapter->pdev; 1947 1948 e1000_clean_tx_ring(adapter, tx_ring); 1949 1950 vfree(tx_ring->buffer_info); 1951 tx_ring->buffer_info = NULL; 1952 1953 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, 1954 tx_ring->dma); 1955 1956 tx_ring->desc = NULL; 1957 } 1958 1959 /** 1960 * e1000_free_all_tx_resources - Free Tx Resources for All Queues 1961 * @adapter: board private structure 1962 * 1963 * Free all transmit software resources 1964 **/ 1965 1966 void e1000_free_all_tx_resources(struct e1000_adapter *adapter) 1967 { 1968 int i; 1969 1970 for (i = 0; i < adapter->num_tx_queues; i++) 1971 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]); 1972 } 1973 1974 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter, 1975 struct e1000_buffer *buffer_info) 1976 { 1977 if (buffer_info->dma) { 1978 if (buffer_info->mapped_as_page) 1979 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, 1980 buffer_info->length, DMA_TO_DEVICE); 1981 else 1982 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, 1983 buffer_info->length, 1984 DMA_TO_DEVICE); 1985 buffer_info->dma = 0; 1986 } 1987 if (buffer_info->skb) { 1988 dev_kfree_skb_any(buffer_info->skb); 1989 buffer_info->skb = NULL; 1990 } 1991 buffer_info->time_stamp = 0; 1992 /* buffer_info must be completely set up in the transmit path */ 1993 } 1994 1995 /** 1996 * e1000_clean_tx_ring - Free Tx Buffers 1997 * @adapter: board private structure 1998 * @tx_ring: ring to be cleaned 1999 **/ 2000 2001 static void e1000_clean_tx_ring(struct e1000_adapter *adapter, 2002 struct e1000_tx_ring *tx_ring) 2003 { 2004 struct e1000_hw *hw = &adapter->hw; 2005 struct e1000_buffer *buffer_info; 2006 unsigned long size; 2007 unsigned int i; 2008 2009 /* Free all the Tx ring sk_buffs */ 2010 2011 for (i = 0; i < tx_ring->count; i++) { 2012 buffer_info = &tx_ring->buffer_info[i]; 2013 e1000_unmap_and_free_tx_resource(adapter, buffer_info); 2014 } 2015 2016 netdev_reset_queue(adapter->netdev); 2017 size = sizeof(struct e1000_buffer) * tx_ring->count; 2018 memset(tx_ring->buffer_info, 0, size); 2019 2020 /* Zero out the descriptor ring */ 2021 2022 memset(tx_ring->desc, 0, tx_ring->size); 2023 2024 tx_ring->next_to_use = 0; 2025 tx_ring->next_to_clean = 0; 2026 tx_ring->last_tx_tso = false; 2027 2028 writel(0, hw->hw_addr + tx_ring->tdh); 2029 writel(0, hw->hw_addr + tx_ring->tdt); 2030 } 2031 2032 /** 2033 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues 2034 * @adapter: board private structure 2035 **/ 2036 2037 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter) 2038 { 2039 int i; 2040 2041 for (i = 0; i < adapter->num_tx_queues; i++) 2042 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]); 2043 } 2044 2045 /** 2046 * e1000_free_rx_resources - Free Rx Resources 2047 * @adapter: board private structure 2048 * @rx_ring: ring to clean the resources from 2049 * 2050 * Free all receive software resources 2051 **/ 2052 2053 static void e1000_free_rx_resources(struct e1000_adapter *adapter, 2054 struct e1000_rx_ring *rx_ring) 2055 { 2056 struct pci_dev *pdev = adapter->pdev; 2057 2058 e1000_clean_rx_ring(adapter, rx_ring); 2059 2060 vfree(rx_ring->buffer_info); 2061 rx_ring->buffer_info = NULL; 2062 2063 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, 2064 rx_ring->dma); 2065 2066 rx_ring->desc = NULL; 2067 } 2068 2069 /** 2070 * e1000_free_all_rx_resources - Free Rx Resources for All Queues 2071 * @adapter: board private structure 2072 * 2073 * Free all receive software resources 2074 **/ 2075 2076 void e1000_free_all_rx_resources(struct e1000_adapter *adapter) 2077 { 2078 int i; 2079 2080 for (i = 0; i < adapter->num_rx_queues; i++) 2081 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]); 2082 } 2083 2084 /** 2085 * e1000_clean_rx_ring - Free Rx Buffers per Queue 2086 * @adapter: board private structure 2087 * @rx_ring: ring to free buffers from 2088 **/ 2089 2090 static void e1000_clean_rx_ring(struct e1000_adapter *adapter, 2091 struct e1000_rx_ring *rx_ring) 2092 { 2093 struct e1000_hw *hw = &adapter->hw; 2094 struct e1000_buffer *buffer_info; 2095 struct pci_dev *pdev = adapter->pdev; 2096 unsigned long size; 2097 unsigned int i; 2098 2099 /* Free all the Rx ring sk_buffs */ 2100 for (i = 0; i < rx_ring->count; i++) { 2101 buffer_info = &rx_ring->buffer_info[i]; 2102 if (buffer_info->dma && 2103 adapter->clean_rx == e1000_clean_rx_irq) { 2104 dma_unmap_single(&pdev->dev, buffer_info->dma, 2105 buffer_info->length, 2106 DMA_FROM_DEVICE); 2107 } else if (buffer_info->dma && 2108 adapter->clean_rx == e1000_clean_jumbo_rx_irq) { 2109 dma_unmap_page(&pdev->dev, buffer_info->dma, 2110 buffer_info->length, 2111 DMA_FROM_DEVICE); 2112 } 2113 2114 buffer_info->dma = 0; 2115 if (buffer_info->page) { 2116 put_page(buffer_info->page); 2117 buffer_info->page = NULL; 2118 } 2119 if (buffer_info->skb) { 2120 dev_kfree_skb(buffer_info->skb); 2121 buffer_info->skb = NULL; 2122 } 2123 } 2124 2125 /* there also may be some cached data from a chained receive */ 2126 if (rx_ring->rx_skb_top) { 2127 dev_kfree_skb(rx_ring->rx_skb_top); 2128 rx_ring->rx_skb_top = NULL; 2129 } 2130 2131 size = sizeof(struct e1000_buffer) * rx_ring->count; 2132 memset(rx_ring->buffer_info, 0, size); 2133 2134 /* Zero out the descriptor ring */ 2135 memset(rx_ring->desc, 0, rx_ring->size); 2136 2137 rx_ring->next_to_clean = 0; 2138 rx_ring->next_to_use = 0; 2139 2140 writel(0, hw->hw_addr + rx_ring->rdh); 2141 writel(0, hw->hw_addr + rx_ring->rdt); 2142 } 2143 2144 /** 2145 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues 2146 * @adapter: board private structure 2147 **/ 2148 2149 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter) 2150 { 2151 int i; 2152 2153 for (i = 0; i < adapter->num_rx_queues; i++) 2154 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]); 2155 } 2156 2157 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset 2158 * and memory write and invalidate disabled for certain operations 2159 */ 2160 static void e1000_enter_82542_rst(struct e1000_adapter *adapter) 2161 { 2162 struct e1000_hw *hw = &adapter->hw; 2163 struct net_device *netdev = adapter->netdev; 2164 u32 rctl; 2165 2166 e1000_pci_clear_mwi(hw); 2167 2168 rctl = er32(RCTL); 2169 rctl |= E1000_RCTL_RST; 2170 ew32(RCTL, rctl); 2171 E1000_WRITE_FLUSH(); 2172 mdelay(5); 2173 2174 if (netif_running(netdev)) 2175 e1000_clean_all_rx_rings(adapter); 2176 } 2177 2178 static void e1000_leave_82542_rst(struct e1000_adapter *adapter) 2179 { 2180 struct e1000_hw *hw = &adapter->hw; 2181 struct net_device *netdev = adapter->netdev; 2182 u32 rctl; 2183 2184 rctl = er32(RCTL); 2185 rctl &= ~E1000_RCTL_RST; 2186 ew32(RCTL, rctl); 2187 E1000_WRITE_FLUSH(); 2188 mdelay(5); 2189 2190 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE) 2191 e1000_pci_set_mwi(hw); 2192 2193 if (netif_running(netdev)) { 2194 /* No need to loop, because 82542 supports only 1 queue */ 2195 struct e1000_rx_ring *ring = &adapter->rx_ring[0]; 2196 e1000_configure_rx(adapter); 2197 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring)); 2198 } 2199 } 2200 2201 /** 2202 * e1000_set_mac - Change the Ethernet Address of the NIC 2203 * @netdev: network interface device structure 2204 * @p: pointer to an address structure 2205 * 2206 * Returns 0 on success, negative on failure 2207 **/ 2208 2209 static int e1000_set_mac(struct net_device *netdev, void *p) 2210 { 2211 struct e1000_adapter *adapter = netdev_priv(netdev); 2212 struct e1000_hw *hw = &adapter->hw; 2213 struct sockaddr *addr = p; 2214 2215 if (!is_valid_ether_addr(addr->sa_data)) 2216 return -EADDRNOTAVAIL; 2217 2218 /* 82542 2.0 needs to be in reset to write receive address registers */ 2219 2220 if (hw->mac_type == e1000_82542_rev2_0) 2221 e1000_enter_82542_rst(adapter); 2222 2223 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 2224 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len); 2225 2226 e1000_rar_set(hw, hw->mac_addr, 0); 2227 2228 if (hw->mac_type == e1000_82542_rev2_0) 2229 e1000_leave_82542_rst(adapter); 2230 2231 return 0; 2232 } 2233 2234 /** 2235 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set 2236 * @netdev: network interface device structure 2237 * 2238 * The set_rx_mode entry point is called whenever the unicast or multicast 2239 * address lists or the network interface flags are updated. This routine is 2240 * responsible for configuring the hardware for proper unicast, multicast, 2241 * promiscuous mode, and all-multi behavior. 2242 **/ 2243 2244 static void e1000_set_rx_mode(struct net_device *netdev) 2245 { 2246 struct e1000_adapter *adapter = netdev_priv(netdev); 2247 struct e1000_hw *hw = &adapter->hw; 2248 struct netdev_hw_addr *ha; 2249 bool use_uc = false; 2250 u32 rctl; 2251 u32 hash_value; 2252 int i, rar_entries = E1000_RAR_ENTRIES; 2253 int mta_reg_count = E1000_NUM_MTA_REGISTERS; 2254 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC); 2255 2256 if (!mcarray) { 2257 e_err(probe, "memory allocation failed\n"); 2258 return; 2259 } 2260 2261 /* Check for Promiscuous and All Multicast modes */ 2262 2263 rctl = er32(RCTL); 2264 2265 if (netdev->flags & IFF_PROMISC) { 2266 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); 2267 rctl &= ~E1000_RCTL_VFE; 2268 } else { 2269 if (netdev->flags & IFF_ALLMULTI) 2270 rctl |= E1000_RCTL_MPE; 2271 else 2272 rctl &= ~E1000_RCTL_MPE; 2273 /* Enable VLAN filter if there is a VLAN */ 2274 if (e1000_vlan_used(adapter)) 2275 rctl |= E1000_RCTL_VFE; 2276 } 2277 2278 if (netdev_uc_count(netdev) > rar_entries - 1) { 2279 rctl |= E1000_RCTL_UPE; 2280 } else if (!(netdev->flags & IFF_PROMISC)) { 2281 rctl &= ~E1000_RCTL_UPE; 2282 use_uc = true; 2283 } 2284 2285 ew32(RCTL, rctl); 2286 2287 /* 82542 2.0 needs to be in reset to write receive address registers */ 2288 2289 if (hw->mac_type == e1000_82542_rev2_0) 2290 e1000_enter_82542_rst(adapter); 2291 2292 /* load the first 14 addresses into the exact filters 1-14. Unicast 2293 * addresses take precedence to avoid disabling unicast filtering 2294 * when possible. 2295 * 2296 * RAR 0 is used for the station MAC address 2297 * if there are not 14 addresses, go ahead and clear the filters 2298 */ 2299 i = 1; 2300 if (use_uc) 2301 netdev_for_each_uc_addr(ha, netdev) { 2302 if (i == rar_entries) 2303 break; 2304 e1000_rar_set(hw, ha->addr, i++); 2305 } 2306 2307 netdev_for_each_mc_addr(ha, netdev) { 2308 if (i == rar_entries) { 2309 /* load any remaining addresses into the hash table */ 2310 u32 hash_reg, hash_bit, mta; 2311 hash_value = e1000_hash_mc_addr(hw, ha->addr); 2312 hash_reg = (hash_value >> 5) & 0x7F; 2313 hash_bit = hash_value & 0x1F; 2314 mta = (1 << hash_bit); 2315 mcarray[hash_reg] |= mta; 2316 } else { 2317 e1000_rar_set(hw, ha->addr, i++); 2318 } 2319 } 2320 2321 for (; i < rar_entries; i++) { 2322 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0); 2323 E1000_WRITE_FLUSH(); 2324 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0); 2325 E1000_WRITE_FLUSH(); 2326 } 2327 2328 /* write the hash table completely, write from bottom to avoid 2329 * both stupid write combining chipsets, and flushing each write */ 2330 for (i = mta_reg_count - 1; i >= 0 ; i--) { 2331 /* 2332 * If we are on an 82544 has an errata where writing odd 2333 * offsets overwrites the previous even offset, but writing 2334 * backwards over the range solves the issue by always 2335 * writing the odd offset first 2336 */ 2337 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]); 2338 } 2339 E1000_WRITE_FLUSH(); 2340 2341 if (hw->mac_type == e1000_82542_rev2_0) 2342 e1000_leave_82542_rst(adapter); 2343 2344 kfree(mcarray); 2345 } 2346 2347 /** 2348 * e1000_update_phy_info_task - get phy info 2349 * @work: work struct contained inside adapter struct 2350 * 2351 * Need to wait a few seconds after link up to get diagnostic information from 2352 * the phy 2353 */ 2354 static void e1000_update_phy_info_task(struct work_struct *work) 2355 { 2356 struct e1000_adapter *adapter = container_of(work, 2357 struct e1000_adapter, 2358 phy_info_task.work); 2359 if (test_bit(__E1000_DOWN, &adapter->flags)) 2360 return; 2361 mutex_lock(&adapter->mutex); 2362 e1000_phy_get_info(&adapter->hw, &adapter->phy_info); 2363 mutex_unlock(&adapter->mutex); 2364 } 2365 2366 /** 2367 * e1000_82547_tx_fifo_stall_task - task to complete work 2368 * @work: work struct contained inside adapter struct 2369 **/ 2370 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work) 2371 { 2372 struct e1000_adapter *adapter = container_of(work, 2373 struct e1000_adapter, 2374 fifo_stall_task.work); 2375 struct e1000_hw *hw = &adapter->hw; 2376 struct net_device *netdev = adapter->netdev; 2377 u32 tctl; 2378 2379 if (test_bit(__E1000_DOWN, &adapter->flags)) 2380 return; 2381 mutex_lock(&adapter->mutex); 2382 if (atomic_read(&adapter->tx_fifo_stall)) { 2383 if ((er32(TDT) == er32(TDH)) && 2384 (er32(TDFT) == er32(TDFH)) && 2385 (er32(TDFTS) == er32(TDFHS))) { 2386 tctl = er32(TCTL); 2387 ew32(TCTL, tctl & ~E1000_TCTL_EN); 2388 ew32(TDFT, adapter->tx_head_addr); 2389 ew32(TDFH, adapter->tx_head_addr); 2390 ew32(TDFTS, adapter->tx_head_addr); 2391 ew32(TDFHS, adapter->tx_head_addr); 2392 ew32(TCTL, tctl); 2393 E1000_WRITE_FLUSH(); 2394 2395 adapter->tx_fifo_head = 0; 2396 atomic_set(&adapter->tx_fifo_stall, 0); 2397 netif_wake_queue(netdev); 2398 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) { 2399 schedule_delayed_work(&adapter->fifo_stall_task, 1); 2400 } 2401 } 2402 mutex_unlock(&adapter->mutex); 2403 } 2404 2405 bool e1000_has_link(struct e1000_adapter *adapter) 2406 { 2407 struct e1000_hw *hw = &adapter->hw; 2408 bool link_active = false; 2409 2410 /* get_link_status is set on LSC (link status) interrupt or rx 2411 * sequence error interrupt (except on intel ce4100). 2412 * get_link_status will stay false until the 2413 * e1000_check_for_link establishes link for copper adapters 2414 * ONLY 2415 */ 2416 switch (hw->media_type) { 2417 case e1000_media_type_copper: 2418 if (hw->mac_type == e1000_ce4100) 2419 hw->get_link_status = 1; 2420 if (hw->get_link_status) { 2421 e1000_check_for_link(hw); 2422 link_active = !hw->get_link_status; 2423 } else { 2424 link_active = true; 2425 } 2426 break; 2427 case e1000_media_type_fiber: 2428 e1000_check_for_link(hw); 2429 link_active = !!(er32(STATUS) & E1000_STATUS_LU); 2430 break; 2431 case e1000_media_type_internal_serdes: 2432 e1000_check_for_link(hw); 2433 link_active = hw->serdes_has_link; 2434 break; 2435 default: 2436 break; 2437 } 2438 2439 return link_active; 2440 } 2441 2442 /** 2443 * e1000_watchdog - work function 2444 * @work: work struct contained inside adapter struct 2445 **/ 2446 static void e1000_watchdog(struct work_struct *work) 2447 { 2448 struct e1000_adapter *adapter = container_of(work, 2449 struct e1000_adapter, 2450 watchdog_task.work); 2451 struct e1000_hw *hw = &adapter->hw; 2452 struct net_device *netdev = adapter->netdev; 2453 struct e1000_tx_ring *txdr = adapter->tx_ring; 2454 u32 link, tctl; 2455 2456 if (test_bit(__E1000_DOWN, &adapter->flags)) 2457 return; 2458 2459 mutex_lock(&adapter->mutex); 2460 link = e1000_has_link(adapter); 2461 if ((netif_carrier_ok(netdev)) && link) 2462 goto link_up; 2463 2464 if (link) { 2465 if (!netif_carrier_ok(netdev)) { 2466 u32 ctrl; 2467 bool txb2b = true; 2468 /* update snapshot of PHY registers on LSC */ 2469 e1000_get_speed_and_duplex(hw, 2470 &adapter->link_speed, 2471 &adapter->link_duplex); 2472 2473 ctrl = er32(CTRL); 2474 pr_info("%s NIC Link is Up %d Mbps %s, " 2475 "Flow Control: %s\n", 2476 netdev->name, 2477 adapter->link_speed, 2478 adapter->link_duplex == FULL_DUPLEX ? 2479 "Full Duplex" : "Half Duplex", 2480 ((ctrl & E1000_CTRL_TFCE) && (ctrl & 2481 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl & 2482 E1000_CTRL_RFCE) ? "RX" : ((ctrl & 2483 E1000_CTRL_TFCE) ? "TX" : "None"))); 2484 2485 /* adjust timeout factor according to speed/duplex */ 2486 adapter->tx_timeout_factor = 1; 2487 switch (adapter->link_speed) { 2488 case SPEED_10: 2489 txb2b = false; 2490 adapter->tx_timeout_factor = 16; 2491 break; 2492 case SPEED_100: 2493 txb2b = false; 2494 /* maybe add some timeout factor ? */ 2495 break; 2496 } 2497 2498 /* enable transmits in the hardware */ 2499 tctl = er32(TCTL); 2500 tctl |= E1000_TCTL_EN; 2501 ew32(TCTL, tctl); 2502 2503 netif_carrier_on(netdev); 2504 if (!test_bit(__E1000_DOWN, &adapter->flags)) 2505 schedule_delayed_work(&adapter->phy_info_task, 2506 2 * HZ); 2507 adapter->smartspeed = 0; 2508 } 2509 } else { 2510 if (netif_carrier_ok(netdev)) { 2511 adapter->link_speed = 0; 2512 adapter->link_duplex = 0; 2513 pr_info("%s NIC Link is Down\n", 2514 netdev->name); 2515 netif_carrier_off(netdev); 2516 2517 if (!test_bit(__E1000_DOWN, &adapter->flags)) 2518 schedule_delayed_work(&adapter->phy_info_task, 2519 2 * HZ); 2520 } 2521 2522 e1000_smartspeed(adapter); 2523 } 2524 2525 link_up: 2526 e1000_update_stats(adapter); 2527 2528 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; 2529 adapter->tpt_old = adapter->stats.tpt; 2530 hw->collision_delta = adapter->stats.colc - adapter->colc_old; 2531 adapter->colc_old = adapter->stats.colc; 2532 2533 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old; 2534 adapter->gorcl_old = adapter->stats.gorcl; 2535 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old; 2536 adapter->gotcl_old = adapter->stats.gotcl; 2537 2538 e1000_update_adaptive(hw); 2539 2540 if (!netif_carrier_ok(netdev)) { 2541 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) { 2542 /* We've lost link, so the controller stops DMA, 2543 * but we've got queued Tx work that's never going 2544 * to get done, so reset controller to flush Tx. 2545 * (Do the reset outside of interrupt context). */ 2546 adapter->tx_timeout_count++; 2547 schedule_work(&adapter->reset_task); 2548 /* exit immediately since reset is imminent */ 2549 goto unlock; 2550 } 2551 } 2552 2553 /* Simple mode for Interrupt Throttle Rate (ITR) */ 2554 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) { 2555 /* 2556 * Symmetric Tx/Rx gets a reduced ITR=2000; 2557 * Total asymmetrical Tx or Rx gets ITR=8000; 2558 * everyone else is between 2000-8000. 2559 */ 2560 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000; 2561 u32 dif = (adapter->gotcl > adapter->gorcl ? 2562 adapter->gotcl - adapter->gorcl : 2563 adapter->gorcl - adapter->gotcl) / 10000; 2564 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000; 2565 2566 ew32(ITR, 1000000000 / (itr * 256)); 2567 } 2568 2569 /* Cause software interrupt to ensure rx ring is cleaned */ 2570 ew32(ICS, E1000_ICS_RXDMT0); 2571 2572 /* Force detection of hung controller every watchdog period */ 2573 adapter->detect_tx_hung = true; 2574 2575 /* Reschedule the task */ 2576 if (!test_bit(__E1000_DOWN, &adapter->flags)) 2577 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ); 2578 2579 unlock: 2580 mutex_unlock(&adapter->mutex); 2581 } 2582 2583 enum latency_range { 2584 lowest_latency = 0, 2585 low_latency = 1, 2586 bulk_latency = 2, 2587 latency_invalid = 255 2588 }; 2589 2590 /** 2591 * e1000_update_itr - update the dynamic ITR value based on statistics 2592 * @adapter: pointer to adapter 2593 * @itr_setting: current adapter->itr 2594 * @packets: the number of packets during this measurement interval 2595 * @bytes: the number of bytes during this measurement interval 2596 * 2597 * Stores a new ITR value based on packets and byte 2598 * counts during the last interrupt. The advantage of per interrupt 2599 * computation is faster updates and more accurate ITR for the current 2600 * traffic pattern. Constants in this function were computed 2601 * based on theoretical maximum wire speed and thresholds were set based 2602 * on testing data as well as attempting to minimize response time 2603 * while increasing bulk throughput. 2604 * this functionality is controlled by the InterruptThrottleRate module 2605 * parameter (see e1000_param.c) 2606 **/ 2607 static unsigned int e1000_update_itr(struct e1000_adapter *adapter, 2608 u16 itr_setting, int packets, int bytes) 2609 { 2610 unsigned int retval = itr_setting; 2611 struct e1000_hw *hw = &adapter->hw; 2612 2613 if (unlikely(hw->mac_type < e1000_82540)) 2614 goto update_itr_done; 2615 2616 if (packets == 0) 2617 goto update_itr_done; 2618 2619 switch (itr_setting) { 2620 case lowest_latency: 2621 /* jumbo frames get bulk treatment*/ 2622 if (bytes/packets > 8000) 2623 retval = bulk_latency; 2624 else if ((packets < 5) && (bytes > 512)) 2625 retval = low_latency; 2626 break; 2627 case low_latency: /* 50 usec aka 20000 ints/s */ 2628 if (bytes > 10000) { 2629 /* jumbo frames need bulk latency setting */ 2630 if (bytes/packets > 8000) 2631 retval = bulk_latency; 2632 else if ((packets < 10) || ((bytes/packets) > 1200)) 2633 retval = bulk_latency; 2634 else if ((packets > 35)) 2635 retval = lowest_latency; 2636 } else if (bytes/packets > 2000) 2637 retval = bulk_latency; 2638 else if (packets <= 2 && bytes < 512) 2639 retval = lowest_latency; 2640 break; 2641 case bulk_latency: /* 250 usec aka 4000 ints/s */ 2642 if (bytes > 25000) { 2643 if (packets > 35) 2644 retval = low_latency; 2645 } else if (bytes < 6000) { 2646 retval = low_latency; 2647 } 2648 break; 2649 } 2650 2651 update_itr_done: 2652 return retval; 2653 } 2654 2655 static void e1000_set_itr(struct e1000_adapter *adapter) 2656 { 2657 struct e1000_hw *hw = &adapter->hw; 2658 u16 current_itr; 2659 u32 new_itr = adapter->itr; 2660 2661 if (unlikely(hw->mac_type < e1000_82540)) 2662 return; 2663 2664 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ 2665 if (unlikely(adapter->link_speed != SPEED_1000)) { 2666 current_itr = 0; 2667 new_itr = 4000; 2668 goto set_itr_now; 2669 } 2670 2671 adapter->tx_itr = e1000_update_itr(adapter, 2672 adapter->tx_itr, 2673 adapter->total_tx_packets, 2674 adapter->total_tx_bytes); 2675 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2676 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) 2677 adapter->tx_itr = low_latency; 2678 2679 adapter->rx_itr = e1000_update_itr(adapter, 2680 adapter->rx_itr, 2681 adapter->total_rx_packets, 2682 adapter->total_rx_bytes); 2683 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2684 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) 2685 adapter->rx_itr = low_latency; 2686 2687 current_itr = max(adapter->rx_itr, adapter->tx_itr); 2688 2689 switch (current_itr) { 2690 /* counts and packets in update_itr are dependent on these numbers */ 2691 case lowest_latency: 2692 new_itr = 70000; 2693 break; 2694 case low_latency: 2695 new_itr = 20000; /* aka hwitr = ~200 */ 2696 break; 2697 case bulk_latency: 2698 new_itr = 4000; 2699 break; 2700 default: 2701 break; 2702 } 2703 2704 set_itr_now: 2705 if (new_itr != adapter->itr) { 2706 /* this attempts to bias the interrupt rate towards Bulk 2707 * by adding intermediate steps when interrupt rate is 2708 * increasing */ 2709 new_itr = new_itr > adapter->itr ? 2710 min(adapter->itr + (new_itr >> 2), new_itr) : 2711 new_itr; 2712 adapter->itr = new_itr; 2713 ew32(ITR, 1000000000 / (new_itr * 256)); 2714 } 2715 } 2716 2717 #define E1000_TX_FLAGS_CSUM 0x00000001 2718 #define E1000_TX_FLAGS_VLAN 0x00000002 2719 #define E1000_TX_FLAGS_TSO 0x00000004 2720 #define E1000_TX_FLAGS_IPV4 0x00000008 2721 #define E1000_TX_FLAGS_NO_FCS 0x00000010 2722 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 2723 #define E1000_TX_FLAGS_VLAN_SHIFT 16 2724 2725 static int e1000_tso(struct e1000_adapter *adapter, 2726 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) 2727 { 2728 struct e1000_context_desc *context_desc; 2729 struct e1000_buffer *buffer_info; 2730 unsigned int i; 2731 u32 cmd_length = 0; 2732 u16 ipcse = 0, tucse, mss; 2733 u8 ipcss, ipcso, tucss, tucso, hdr_len; 2734 int err; 2735 2736 if (skb_is_gso(skb)) { 2737 if (skb_header_cloned(skb)) { 2738 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 2739 if (err) 2740 return err; 2741 } 2742 2743 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 2744 mss = skb_shinfo(skb)->gso_size; 2745 if (skb->protocol == htons(ETH_P_IP)) { 2746 struct iphdr *iph = ip_hdr(skb); 2747 iph->tot_len = 0; 2748 iph->check = 0; 2749 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, 2750 iph->daddr, 0, 2751 IPPROTO_TCP, 2752 0); 2753 cmd_length = E1000_TXD_CMD_IP; 2754 ipcse = skb_transport_offset(skb) - 1; 2755 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2756 ipv6_hdr(skb)->payload_len = 0; 2757 tcp_hdr(skb)->check = 2758 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 2759 &ipv6_hdr(skb)->daddr, 2760 0, IPPROTO_TCP, 0); 2761 ipcse = 0; 2762 } 2763 ipcss = skb_network_offset(skb); 2764 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data; 2765 tucss = skb_transport_offset(skb); 2766 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; 2767 tucse = 0; 2768 2769 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | 2770 E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); 2771 2772 i = tx_ring->next_to_use; 2773 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 2774 buffer_info = &tx_ring->buffer_info[i]; 2775 2776 context_desc->lower_setup.ip_fields.ipcss = ipcss; 2777 context_desc->lower_setup.ip_fields.ipcso = ipcso; 2778 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); 2779 context_desc->upper_setup.tcp_fields.tucss = tucss; 2780 context_desc->upper_setup.tcp_fields.tucso = tucso; 2781 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse); 2782 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); 2783 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; 2784 context_desc->cmd_and_length = cpu_to_le32(cmd_length); 2785 2786 buffer_info->time_stamp = jiffies; 2787 buffer_info->next_to_watch = i; 2788 2789 if (++i == tx_ring->count) i = 0; 2790 tx_ring->next_to_use = i; 2791 2792 return true; 2793 } 2794 return false; 2795 } 2796 2797 static bool e1000_tx_csum(struct e1000_adapter *adapter, 2798 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) 2799 { 2800 struct e1000_context_desc *context_desc; 2801 struct e1000_buffer *buffer_info; 2802 unsigned int i; 2803 u8 css; 2804 u32 cmd_len = E1000_TXD_CMD_DEXT; 2805 2806 if (skb->ip_summed != CHECKSUM_PARTIAL) 2807 return false; 2808 2809 switch (skb->protocol) { 2810 case cpu_to_be16(ETH_P_IP): 2811 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 2812 cmd_len |= E1000_TXD_CMD_TCP; 2813 break; 2814 case cpu_to_be16(ETH_P_IPV6): 2815 /* XXX not handling all IPV6 headers */ 2816 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 2817 cmd_len |= E1000_TXD_CMD_TCP; 2818 break; 2819 default: 2820 if (unlikely(net_ratelimit())) 2821 e_warn(drv, "checksum_partial proto=%x!\n", 2822 skb->protocol); 2823 break; 2824 } 2825 2826 css = skb_checksum_start_offset(skb); 2827 2828 i = tx_ring->next_to_use; 2829 buffer_info = &tx_ring->buffer_info[i]; 2830 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 2831 2832 context_desc->lower_setup.ip_config = 0; 2833 context_desc->upper_setup.tcp_fields.tucss = css; 2834 context_desc->upper_setup.tcp_fields.tucso = 2835 css + skb->csum_offset; 2836 context_desc->upper_setup.tcp_fields.tucse = 0; 2837 context_desc->tcp_seg_setup.data = 0; 2838 context_desc->cmd_and_length = cpu_to_le32(cmd_len); 2839 2840 buffer_info->time_stamp = jiffies; 2841 buffer_info->next_to_watch = i; 2842 2843 if (unlikely(++i == tx_ring->count)) i = 0; 2844 tx_ring->next_to_use = i; 2845 2846 return true; 2847 } 2848 2849 #define E1000_MAX_TXD_PWR 12 2850 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR) 2851 2852 static int e1000_tx_map(struct e1000_adapter *adapter, 2853 struct e1000_tx_ring *tx_ring, 2854 struct sk_buff *skb, unsigned int first, 2855 unsigned int max_per_txd, unsigned int nr_frags, 2856 unsigned int mss) 2857 { 2858 struct e1000_hw *hw = &adapter->hw; 2859 struct pci_dev *pdev = adapter->pdev; 2860 struct e1000_buffer *buffer_info; 2861 unsigned int len = skb_headlen(skb); 2862 unsigned int offset = 0, size, count = 0, i; 2863 unsigned int f, bytecount, segs; 2864 2865 i = tx_ring->next_to_use; 2866 2867 while (len) { 2868 buffer_info = &tx_ring->buffer_info[i]; 2869 size = min(len, max_per_txd); 2870 /* Workaround for Controller erratum -- 2871 * descriptor for non-tso packet in a linear SKB that follows a 2872 * tso gets written back prematurely before the data is fully 2873 * DMA'd to the controller */ 2874 if (!skb->data_len && tx_ring->last_tx_tso && 2875 !skb_is_gso(skb)) { 2876 tx_ring->last_tx_tso = false; 2877 size -= 4; 2878 } 2879 2880 /* Workaround for premature desc write-backs 2881 * in TSO mode. Append 4-byte sentinel desc */ 2882 if (unlikely(mss && !nr_frags && size == len && size > 8)) 2883 size -= 4; 2884 /* work-around for errata 10 and it applies 2885 * to all controllers in PCI-X mode 2886 * The fix is to make sure that the first descriptor of a 2887 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes 2888 */ 2889 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && 2890 (size > 2015) && count == 0)) 2891 size = 2015; 2892 2893 /* Workaround for potential 82544 hang in PCI-X. Avoid 2894 * terminating buffers within evenly-aligned dwords. */ 2895 if (unlikely(adapter->pcix_82544 && 2896 !((unsigned long)(skb->data + offset + size - 1) & 4) && 2897 size > 4)) 2898 size -= 4; 2899 2900 buffer_info->length = size; 2901 /* set time_stamp *before* dma to help avoid a possible race */ 2902 buffer_info->time_stamp = jiffies; 2903 buffer_info->mapped_as_page = false; 2904 buffer_info->dma = dma_map_single(&pdev->dev, 2905 skb->data + offset, 2906 size, DMA_TO_DEVICE); 2907 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 2908 goto dma_error; 2909 buffer_info->next_to_watch = i; 2910 2911 len -= size; 2912 offset += size; 2913 count++; 2914 if (len) { 2915 i++; 2916 if (unlikely(i == tx_ring->count)) 2917 i = 0; 2918 } 2919 } 2920 2921 for (f = 0; f < nr_frags; f++) { 2922 const struct skb_frag_struct *frag; 2923 2924 frag = &skb_shinfo(skb)->frags[f]; 2925 len = skb_frag_size(frag); 2926 offset = 0; 2927 2928 while (len) { 2929 unsigned long bufend; 2930 i++; 2931 if (unlikely(i == tx_ring->count)) 2932 i = 0; 2933 2934 buffer_info = &tx_ring->buffer_info[i]; 2935 size = min(len, max_per_txd); 2936 /* Workaround for premature desc write-backs 2937 * in TSO mode. Append 4-byte sentinel desc */ 2938 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8)) 2939 size -= 4; 2940 /* Workaround for potential 82544 hang in PCI-X. 2941 * Avoid terminating buffers within evenly-aligned 2942 * dwords. */ 2943 bufend = (unsigned long) 2944 page_to_phys(skb_frag_page(frag)); 2945 bufend += offset + size - 1; 2946 if (unlikely(adapter->pcix_82544 && 2947 !(bufend & 4) && 2948 size > 4)) 2949 size -= 4; 2950 2951 buffer_info->length = size; 2952 buffer_info->time_stamp = jiffies; 2953 buffer_info->mapped_as_page = true; 2954 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 2955 offset, size, DMA_TO_DEVICE); 2956 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 2957 goto dma_error; 2958 buffer_info->next_to_watch = i; 2959 2960 len -= size; 2961 offset += size; 2962 count++; 2963 } 2964 } 2965 2966 segs = skb_shinfo(skb)->gso_segs ?: 1; 2967 /* multiply data chunks by size of headers */ 2968 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len; 2969 2970 tx_ring->buffer_info[i].skb = skb; 2971 tx_ring->buffer_info[i].segs = segs; 2972 tx_ring->buffer_info[i].bytecount = bytecount; 2973 tx_ring->buffer_info[first].next_to_watch = i; 2974 2975 return count; 2976 2977 dma_error: 2978 dev_err(&pdev->dev, "TX DMA map failed\n"); 2979 buffer_info->dma = 0; 2980 if (count) 2981 count--; 2982 2983 while (count--) { 2984 if (i==0) 2985 i += tx_ring->count; 2986 i--; 2987 buffer_info = &tx_ring->buffer_info[i]; 2988 e1000_unmap_and_free_tx_resource(adapter, buffer_info); 2989 } 2990 2991 return 0; 2992 } 2993 2994 static void e1000_tx_queue(struct e1000_adapter *adapter, 2995 struct e1000_tx_ring *tx_ring, int tx_flags, 2996 int count) 2997 { 2998 struct e1000_hw *hw = &adapter->hw; 2999 struct e1000_tx_desc *tx_desc = NULL; 3000 struct e1000_buffer *buffer_info; 3001 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; 3002 unsigned int i; 3003 3004 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) { 3005 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | 3006 E1000_TXD_CMD_TSE; 3007 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 3008 3009 if (likely(tx_flags & E1000_TX_FLAGS_IPV4)) 3010 txd_upper |= E1000_TXD_POPTS_IXSM << 8; 3011 } 3012 3013 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) { 3014 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; 3015 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 3016 } 3017 3018 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) { 3019 txd_lower |= E1000_TXD_CMD_VLE; 3020 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); 3021 } 3022 3023 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 3024 txd_lower &= ~(E1000_TXD_CMD_IFCS); 3025 3026 i = tx_ring->next_to_use; 3027 3028 while (count--) { 3029 buffer_info = &tx_ring->buffer_info[i]; 3030 tx_desc = E1000_TX_DESC(*tx_ring, i); 3031 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 3032 tx_desc->lower.data = 3033 cpu_to_le32(txd_lower | buffer_info->length); 3034 tx_desc->upper.data = cpu_to_le32(txd_upper); 3035 if (unlikely(++i == tx_ring->count)) i = 0; 3036 } 3037 3038 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); 3039 3040 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */ 3041 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 3042 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); 3043 3044 /* Force memory writes to complete before letting h/w 3045 * know there are new descriptors to fetch. (Only 3046 * applicable for weak-ordered memory model archs, 3047 * such as IA-64). */ 3048 wmb(); 3049 3050 tx_ring->next_to_use = i; 3051 writel(i, hw->hw_addr + tx_ring->tdt); 3052 /* we need this if more than one processor can write to our tail 3053 * at a time, it syncronizes IO on IA64/Altix systems */ 3054 mmiowb(); 3055 } 3056 3057 /* 82547 workaround to avoid controller hang in half-duplex environment. 3058 * The workaround is to avoid queuing a large packet that would span 3059 * the internal Tx FIFO ring boundary by notifying the stack to resend 3060 * the packet at a later time. This gives the Tx FIFO an opportunity to 3061 * flush all packets. When that occurs, we reset the Tx FIFO pointers 3062 * to the beginning of the Tx FIFO. 3063 */ 3064 3065 #define E1000_FIFO_HDR 0x10 3066 #define E1000_82547_PAD_LEN 0x3E0 3067 3068 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, 3069 struct sk_buff *skb) 3070 { 3071 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head; 3072 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR; 3073 3074 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR); 3075 3076 if (adapter->link_duplex != HALF_DUPLEX) 3077 goto no_fifo_stall_required; 3078 3079 if (atomic_read(&adapter->tx_fifo_stall)) 3080 return 1; 3081 3082 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) { 3083 atomic_set(&adapter->tx_fifo_stall, 1); 3084 return 1; 3085 } 3086 3087 no_fifo_stall_required: 3088 adapter->tx_fifo_head += skb_fifo_len; 3089 if (adapter->tx_fifo_head >= adapter->tx_fifo_size) 3090 adapter->tx_fifo_head -= adapter->tx_fifo_size; 3091 return 0; 3092 } 3093 3094 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size) 3095 { 3096 struct e1000_adapter *adapter = netdev_priv(netdev); 3097 struct e1000_tx_ring *tx_ring = adapter->tx_ring; 3098 3099 netif_stop_queue(netdev); 3100 /* Herbert's original patch had: 3101 * smp_mb__after_netif_stop_queue(); 3102 * but since that doesn't exist yet, just open code it. */ 3103 smp_mb(); 3104 3105 /* We need to check again in a case another CPU has just 3106 * made room available. */ 3107 if (likely(E1000_DESC_UNUSED(tx_ring) < size)) 3108 return -EBUSY; 3109 3110 /* A reprieve! */ 3111 netif_start_queue(netdev); 3112 ++adapter->restart_queue; 3113 return 0; 3114 } 3115 3116 static int e1000_maybe_stop_tx(struct net_device *netdev, 3117 struct e1000_tx_ring *tx_ring, int size) 3118 { 3119 if (likely(E1000_DESC_UNUSED(tx_ring) >= size)) 3120 return 0; 3121 return __e1000_maybe_stop_tx(netdev, size); 3122 } 3123 3124 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 ) 3125 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, 3126 struct net_device *netdev) 3127 { 3128 struct e1000_adapter *adapter = netdev_priv(netdev); 3129 struct e1000_hw *hw = &adapter->hw; 3130 struct e1000_tx_ring *tx_ring; 3131 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD; 3132 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR; 3133 unsigned int tx_flags = 0; 3134 unsigned int len = skb_headlen(skb); 3135 unsigned int nr_frags; 3136 unsigned int mss; 3137 int count = 0; 3138 int tso; 3139 unsigned int f; 3140 3141 /* This goes back to the question of how to logically map a tx queue 3142 * to a flow. Right now, performance is impacted slightly negatively 3143 * if using multiple tx queues. If the stack breaks away from a 3144 * single qdisc implementation, we can look at this again. */ 3145 tx_ring = adapter->tx_ring; 3146 3147 if (unlikely(skb->len <= 0)) { 3148 dev_kfree_skb_any(skb); 3149 return NETDEV_TX_OK; 3150 } 3151 3152 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN, 3153 * packets may get corrupted during padding by HW. 3154 * To WA this issue, pad all small packets manually. 3155 */ 3156 if (skb->len < ETH_ZLEN) { 3157 if (skb_pad(skb, ETH_ZLEN - skb->len)) 3158 return NETDEV_TX_OK; 3159 skb->len = ETH_ZLEN; 3160 skb_set_tail_pointer(skb, ETH_ZLEN); 3161 } 3162 3163 mss = skb_shinfo(skb)->gso_size; 3164 /* The controller does a simple calculation to 3165 * make sure there is enough room in the FIFO before 3166 * initiating the DMA for each buffer. The calc is: 3167 * 4 = ceil(buffer len/mss). To make sure we don't 3168 * overrun the FIFO, adjust the max buffer len if mss 3169 * drops. */ 3170 if (mss) { 3171 u8 hdr_len; 3172 max_per_txd = min(mss << 2, max_per_txd); 3173 max_txd_pwr = fls(max_per_txd) - 1; 3174 3175 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 3176 if (skb->data_len && hdr_len == len) { 3177 switch (hw->mac_type) { 3178 unsigned int pull_size; 3179 case e1000_82544: 3180 /* Make sure we have room to chop off 4 bytes, 3181 * and that the end alignment will work out to 3182 * this hardware's requirements 3183 * NOTE: this is a TSO only workaround 3184 * if end byte alignment not correct move us 3185 * into the next dword */ 3186 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4) 3187 break; 3188 /* fall through */ 3189 pull_size = min((unsigned int)4, skb->data_len); 3190 if (!__pskb_pull_tail(skb, pull_size)) { 3191 e_err(drv, "__pskb_pull_tail " 3192 "failed.\n"); 3193 dev_kfree_skb_any(skb); 3194 return NETDEV_TX_OK; 3195 } 3196 len = skb_headlen(skb); 3197 break; 3198 default: 3199 /* do nothing */ 3200 break; 3201 } 3202 } 3203 } 3204 3205 /* reserve a descriptor for the offload context */ 3206 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL)) 3207 count++; 3208 count++; 3209 3210 /* Controller Erratum workaround */ 3211 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb)) 3212 count++; 3213 3214 count += TXD_USE_COUNT(len, max_txd_pwr); 3215 3216 if (adapter->pcix_82544) 3217 count++; 3218 3219 /* work-around for errata 10 and it applies to all controllers 3220 * in PCI-X mode, so add one more descriptor to the count 3221 */ 3222 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && 3223 (len > 2015))) 3224 count++; 3225 3226 nr_frags = skb_shinfo(skb)->nr_frags; 3227 for (f = 0; f < nr_frags; f++) 3228 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]), 3229 max_txd_pwr); 3230 if (adapter->pcix_82544) 3231 count += nr_frags; 3232 3233 /* need: count + 2 desc gap to keep tail from touching 3234 * head, otherwise try next time */ 3235 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) 3236 return NETDEV_TX_BUSY; 3237 3238 if (unlikely((hw->mac_type == e1000_82547) && 3239 (e1000_82547_fifo_workaround(adapter, skb)))) { 3240 netif_stop_queue(netdev); 3241 if (!test_bit(__E1000_DOWN, &adapter->flags)) 3242 schedule_delayed_work(&adapter->fifo_stall_task, 1); 3243 return NETDEV_TX_BUSY; 3244 } 3245 3246 if (vlan_tx_tag_present(skb)) { 3247 tx_flags |= E1000_TX_FLAGS_VLAN; 3248 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT); 3249 } 3250 3251 first = tx_ring->next_to_use; 3252 3253 tso = e1000_tso(adapter, tx_ring, skb); 3254 if (tso < 0) { 3255 dev_kfree_skb_any(skb); 3256 return NETDEV_TX_OK; 3257 } 3258 3259 if (likely(tso)) { 3260 if (likely(hw->mac_type != e1000_82544)) 3261 tx_ring->last_tx_tso = true; 3262 tx_flags |= E1000_TX_FLAGS_TSO; 3263 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb))) 3264 tx_flags |= E1000_TX_FLAGS_CSUM; 3265 3266 if (likely(skb->protocol == htons(ETH_P_IP))) 3267 tx_flags |= E1000_TX_FLAGS_IPV4; 3268 3269 if (unlikely(skb->no_fcs)) 3270 tx_flags |= E1000_TX_FLAGS_NO_FCS; 3271 3272 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd, 3273 nr_frags, mss); 3274 3275 if (count) { 3276 netdev_sent_queue(netdev, skb->len); 3277 skb_tx_timestamp(skb); 3278 3279 e1000_tx_queue(adapter, tx_ring, tx_flags, count); 3280 /* Make sure there is space in the ring for the next send. */ 3281 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2); 3282 3283 } else { 3284 dev_kfree_skb_any(skb); 3285 tx_ring->buffer_info[first].time_stamp = 0; 3286 tx_ring->next_to_use = first; 3287 } 3288 3289 return NETDEV_TX_OK; 3290 } 3291 3292 #define NUM_REGS 38 /* 1 based count */ 3293 static void e1000_regdump(struct e1000_adapter *adapter) 3294 { 3295 struct e1000_hw *hw = &adapter->hw; 3296 u32 regs[NUM_REGS]; 3297 u32 *regs_buff = regs; 3298 int i = 0; 3299 3300 static const char * const reg_name[] = { 3301 "CTRL", "STATUS", 3302 "RCTL", "RDLEN", "RDH", "RDT", "RDTR", 3303 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT", 3304 "TIDV", "TXDCTL", "TADV", "TARC0", 3305 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1", 3306 "TXDCTL1", "TARC1", 3307 "CTRL_EXT", "ERT", "RDBAL", "RDBAH", 3308 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC", 3309 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC" 3310 }; 3311 3312 regs_buff[0] = er32(CTRL); 3313 regs_buff[1] = er32(STATUS); 3314 3315 regs_buff[2] = er32(RCTL); 3316 regs_buff[3] = er32(RDLEN); 3317 regs_buff[4] = er32(RDH); 3318 regs_buff[5] = er32(RDT); 3319 regs_buff[6] = er32(RDTR); 3320 3321 regs_buff[7] = er32(TCTL); 3322 regs_buff[8] = er32(TDBAL); 3323 regs_buff[9] = er32(TDBAH); 3324 regs_buff[10] = er32(TDLEN); 3325 regs_buff[11] = er32(TDH); 3326 regs_buff[12] = er32(TDT); 3327 regs_buff[13] = er32(TIDV); 3328 regs_buff[14] = er32(TXDCTL); 3329 regs_buff[15] = er32(TADV); 3330 regs_buff[16] = er32(TARC0); 3331 3332 regs_buff[17] = er32(TDBAL1); 3333 regs_buff[18] = er32(TDBAH1); 3334 regs_buff[19] = er32(TDLEN1); 3335 regs_buff[20] = er32(TDH1); 3336 regs_buff[21] = er32(TDT1); 3337 regs_buff[22] = er32(TXDCTL1); 3338 regs_buff[23] = er32(TARC1); 3339 regs_buff[24] = er32(CTRL_EXT); 3340 regs_buff[25] = er32(ERT); 3341 regs_buff[26] = er32(RDBAL0); 3342 regs_buff[27] = er32(RDBAH0); 3343 regs_buff[28] = er32(TDFH); 3344 regs_buff[29] = er32(TDFT); 3345 regs_buff[30] = er32(TDFHS); 3346 regs_buff[31] = er32(TDFTS); 3347 regs_buff[32] = er32(TDFPC); 3348 regs_buff[33] = er32(RDFH); 3349 regs_buff[34] = er32(RDFT); 3350 regs_buff[35] = er32(RDFHS); 3351 regs_buff[36] = er32(RDFTS); 3352 regs_buff[37] = er32(RDFPC); 3353 3354 pr_info("Register dump\n"); 3355 for (i = 0; i < NUM_REGS; i++) 3356 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]); 3357 } 3358 3359 /* 3360 * e1000_dump: Print registers, tx ring and rx ring 3361 */ 3362 static void e1000_dump(struct e1000_adapter *adapter) 3363 { 3364 /* this code doesn't handle multiple rings */ 3365 struct e1000_tx_ring *tx_ring = adapter->tx_ring; 3366 struct e1000_rx_ring *rx_ring = adapter->rx_ring; 3367 int i; 3368 3369 if (!netif_msg_hw(adapter)) 3370 return; 3371 3372 /* Print Registers */ 3373 e1000_regdump(adapter); 3374 3375 /* 3376 * transmit dump 3377 */ 3378 pr_info("TX Desc ring0 dump\n"); 3379 3380 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended) 3381 * 3382 * Legacy Transmit Descriptor 3383 * +--------------------------------------------------------------+ 3384 * 0 | Buffer Address [63:0] (Reserved on Write Back) | 3385 * +--------------------------------------------------------------+ 3386 * 8 | Special | CSS | Status | CMD | CSO | Length | 3387 * +--------------------------------------------------------------+ 3388 * 63 48 47 36 35 32 31 24 23 16 15 0 3389 * 3390 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload 3391 * 63 48 47 40 39 32 31 16 15 8 7 0 3392 * +----------------------------------------------------------------+ 3393 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS | 3394 * +----------------------------------------------------------------+ 3395 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN | 3396 * +----------------------------------------------------------------+ 3397 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 3398 * 3399 * Extended Data Descriptor (DTYP=0x1) 3400 * +----------------------------------------------------------------+ 3401 * 0 | Buffer Address [63:0] | 3402 * +----------------------------------------------------------------+ 3403 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN | 3404 * +----------------------------------------------------------------+ 3405 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 3406 */ 3407 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n"); 3408 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n"); 3409 3410 if (!netif_msg_tx_done(adapter)) 3411 goto rx_ring_summary; 3412 3413 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { 3414 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i); 3415 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i]; 3416 struct my_u { __le64 a; __le64 b; }; 3417 struct my_u *u = (struct my_u *)tx_desc; 3418 const char *type; 3419 3420 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean) 3421 type = "NTC/U"; 3422 else if (i == tx_ring->next_to_use) 3423 type = "NTU"; 3424 else if (i == tx_ring->next_to_clean) 3425 type = "NTC"; 3426 else 3427 type = ""; 3428 3429 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n", 3430 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i, 3431 le64_to_cpu(u->a), le64_to_cpu(u->b), 3432 (u64)buffer_info->dma, buffer_info->length, 3433 buffer_info->next_to_watch, 3434 (u64)buffer_info->time_stamp, buffer_info->skb, type); 3435 } 3436 3437 rx_ring_summary: 3438 /* 3439 * receive dump 3440 */ 3441 pr_info("\nRX Desc ring dump\n"); 3442 3443 /* Legacy Receive Descriptor Format 3444 * 3445 * +-----------------------------------------------------+ 3446 * | Buffer Address [63:0] | 3447 * +-----------------------------------------------------+ 3448 * | VLAN Tag | Errors | Status 0 | Packet csum | Length | 3449 * +-----------------------------------------------------+ 3450 * 63 48 47 40 39 32 31 16 15 0 3451 */ 3452 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n"); 3453 3454 if (!netif_msg_rx_status(adapter)) 3455 goto exit; 3456 3457 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) { 3458 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i); 3459 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i]; 3460 struct my_u { __le64 a; __le64 b; }; 3461 struct my_u *u = (struct my_u *)rx_desc; 3462 const char *type; 3463 3464 if (i == rx_ring->next_to_use) 3465 type = "NTU"; 3466 else if (i == rx_ring->next_to_clean) 3467 type = "NTC"; 3468 else 3469 type = ""; 3470 3471 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n", 3472 i, le64_to_cpu(u->a), le64_to_cpu(u->b), 3473 (u64)buffer_info->dma, buffer_info->skb, type); 3474 } /* for */ 3475 3476 /* dump the descriptor caches */ 3477 /* rx */ 3478 pr_info("Rx descriptor cache in 64bit format\n"); 3479 for (i = 0x6000; i <= 0x63FF ; i += 0x10) { 3480 pr_info("R%04X: %08X|%08X %08X|%08X\n", 3481 i, 3482 readl(adapter->hw.hw_addr + i+4), 3483 readl(adapter->hw.hw_addr + i), 3484 readl(adapter->hw.hw_addr + i+12), 3485 readl(adapter->hw.hw_addr + i+8)); 3486 } 3487 /* tx */ 3488 pr_info("Tx descriptor cache in 64bit format\n"); 3489 for (i = 0x7000; i <= 0x73FF ; i += 0x10) { 3490 pr_info("T%04X: %08X|%08X %08X|%08X\n", 3491 i, 3492 readl(adapter->hw.hw_addr + i+4), 3493 readl(adapter->hw.hw_addr + i), 3494 readl(adapter->hw.hw_addr + i+12), 3495 readl(adapter->hw.hw_addr + i+8)); 3496 } 3497 exit: 3498 return; 3499 } 3500 3501 /** 3502 * e1000_tx_timeout - Respond to a Tx Hang 3503 * @netdev: network interface device structure 3504 **/ 3505 3506 static void e1000_tx_timeout(struct net_device *netdev) 3507 { 3508 struct e1000_adapter *adapter = netdev_priv(netdev); 3509 3510 /* Do the reset outside of interrupt context */ 3511 adapter->tx_timeout_count++; 3512 schedule_work(&adapter->reset_task); 3513 } 3514 3515 static void e1000_reset_task(struct work_struct *work) 3516 { 3517 struct e1000_adapter *adapter = 3518 container_of(work, struct e1000_adapter, reset_task); 3519 3520 if (test_bit(__E1000_DOWN, &adapter->flags)) 3521 return; 3522 e_err(drv, "Reset adapter\n"); 3523 e1000_reinit_safe(adapter); 3524 } 3525 3526 /** 3527 * e1000_get_stats - Get System Network Statistics 3528 * @netdev: network interface device structure 3529 * 3530 * Returns the address of the device statistics structure. 3531 * The statistics are actually updated from the watchdog. 3532 **/ 3533 3534 static struct net_device_stats *e1000_get_stats(struct net_device *netdev) 3535 { 3536 /* only return the current stats */ 3537 return &netdev->stats; 3538 } 3539 3540 /** 3541 * e1000_change_mtu - Change the Maximum Transfer Unit 3542 * @netdev: network interface device structure 3543 * @new_mtu: new value for maximum frame size 3544 * 3545 * Returns 0 on success, negative on failure 3546 **/ 3547 3548 static int e1000_change_mtu(struct net_device *netdev, int new_mtu) 3549 { 3550 struct e1000_adapter *adapter = netdev_priv(netdev); 3551 struct e1000_hw *hw = &adapter->hw; 3552 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; 3553 3554 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) || 3555 (max_frame > MAX_JUMBO_FRAME_SIZE)) { 3556 e_err(probe, "Invalid MTU setting\n"); 3557 return -EINVAL; 3558 } 3559 3560 /* Adapter-specific max frame size limits. */ 3561 switch (hw->mac_type) { 3562 case e1000_undefined ... e1000_82542_rev2_1: 3563 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) { 3564 e_err(probe, "Jumbo Frames not supported.\n"); 3565 return -EINVAL; 3566 } 3567 break; 3568 default: 3569 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */ 3570 break; 3571 } 3572 3573 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) 3574 msleep(1); 3575 /* e1000_down has a dependency on max_frame_size */ 3576 hw->max_frame_size = max_frame; 3577 if (netif_running(netdev)) 3578 e1000_down(adapter); 3579 3580 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN 3581 * means we reserve 2 more, this pushes us to allocate from the next 3582 * larger slab size. 3583 * i.e. RXBUFFER_2048 --> size-4096 slab 3584 * however with the new *_jumbo_rx* routines, jumbo receives will use 3585 * fragmented skbs */ 3586 3587 if (max_frame <= E1000_RXBUFFER_2048) 3588 adapter->rx_buffer_len = E1000_RXBUFFER_2048; 3589 else 3590 #if (PAGE_SIZE >= E1000_RXBUFFER_16384) 3591 adapter->rx_buffer_len = E1000_RXBUFFER_16384; 3592 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096) 3593 adapter->rx_buffer_len = PAGE_SIZE; 3594 #endif 3595 3596 /* adjust allocation if LPE protects us, and we aren't using SBP */ 3597 if (!hw->tbi_compatibility_on && 3598 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) || 3599 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE))) 3600 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; 3601 3602 pr_info("%s changing MTU from %d to %d\n", 3603 netdev->name, netdev->mtu, new_mtu); 3604 netdev->mtu = new_mtu; 3605 3606 if (netif_running(netdev)) 3607 e1000_up(adapter); 3608 else 3609 e1000_reset(adapter); 3610 3611 clear_bit(__E1000_RESETTING, &adapter->flags); 3612 3613 return 0; 3614 } 3615 3616 /** 3617 * e1000_update_stats - Update the board statistics counters 3618 * @adapter: board private structure 3619 **/ 3620 3621 void e1000_update_stats(struct e1000_adapter *adapter) 3622 { 3623 struct net_device *netdev = adapter->netdev; 3624 struct e1000_hw *hw = &adapter->hw; 3625 struct pci_dev *pdev = adapter->pdev; 3626 unsigned long flags; 3627 u16 phy_tmp; 3628 3629 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF 3630 3631 /* 3632 * Prevent stats update while adapter is being reset, or if the pci 3633 * connection is down. 3634 */ 3635 if (adapter->link_speed == 0) 3636 return; 3637 if (pci_channel_offline(pdev)) 3638 return; 3639 3640 spin_lock_irqsave(&adapter->stats_lock, flags); 3641 3642 /* these counters are modified from e1000_tbi_adjust_stats, 3643 * called from the interrupt context, so they must only 3644 * be written while holding adapter->stats_lock 3645 */ 3646 3647 adapter->stats.crcerrs += er32(CRCERRS); 3648 adapter->stats.gprc += er32(GPRC); 3649 adapter->stats.gorcl += er32(GORCL); 3650 adapter->stats.gorch += er32(GORCH); 3651 adapter->stats.bprc += er32(BPRC); 3652 adapter->stats.mprc += er32(MPRC); 3653 adapter->stats.roc += er32(ROC); 3654 3655 adapter->stats.prc64 += er32(PRC64); 3656 adapter->stats.prc127 += er32(PRC127); 3657 adapter->stats.prc255 += er32(PRC255); 3658 adapter->stats.prc511 += er32(PRC511); 3659 adapter->stats.prc1023 += er32(PRC1023); 3660 adapter->stats.prc1522 += er32(PRC1522); 3661 3662 adapter->stats.symerrs += er32(SYMERRS); 3663 adapter->stats.mpc += er32(MPC); 3664 adapter->stats.scc += er32(SCC); 3665 adapter->stats.ecol += er32(ECOL); 3666 adapter->stats.mcc += er32(MCC); 3667 adapter->stats.latecol += er32(LATECOL); 3668 adapter->stats.dc += er32(DC); 3669 adapter->stats.sec += er32(SEC); 3670 adapter->stats.rlec += er32(RLEC); 3671 adapter->stats.xonrxc += er32(XONRXC); 3672 adapter->stats.xontxc += er32(XONTXC); 3673 adapter->stats.xoffrxc += er32(XOFFRXC); 3674 adapter->stats.xofftxc += er32(XOFFTXC); 3675 adapter->stats.fcruc += er32(FCRUC); 3676 adapter->stats.gptc += er32(GPTC); 3677 adapter->stats.gotcl += er32(GOTCL); 3678 adapter->stats.gotch += er32(GOTCH); 3679 adapter->stats.rnbc += er32(RNBC); 3680 adapter->stats.ruc += er32(RUC); 3681 adapter->stats.rfc += er32(RFC); 3682 adapter->stats.rjc += er32(RJC); 3683 adapter->stats.torl += er32(TORL); 3684 adapter->stats.torh += er32(TORH); 3685 adapter->stats.totl += er32(TOTL); 3686 adapter->stats.toth += er32(TOTH); 3687 adapter->stats.tpr += er32(TPR); 3688 3689 adapter->stats.ptc64 += er32(PTC64); 3690 adapter->stats.ptc127 += er32(PTC127); 3691 adapter->stats.ptc255 += er32(PTC255); 3692 adapter->stats.ptc511 += er32(PTC511); 3693 adapter->stats.ptc1023 += er32(PTC1023); 3694 adapter->stats.ptc1522 += er32(PTC1522); 3695 3696 adapter->stats.mptc += er32(MPTC); 3697 adapter->stats.bptc += er32(BPTC); 3698 3699 /* used for adaptive IFS */ 3700 3701 hw->tx_packet_delta = er32(TPT); 3702 adapter->stats.tpt += hw->tx_packet_delta; 3703 hw->collision_delta = er32(COLC); 3704 adapter->stats.colc += hw->collision_delta; 3705 3706 if (hw->mac_type >= e1000_82543) { 3707 adapter->stats.algnerrc += er32(ALGNERRC); 3708 adapter->stats.rxerrc += er32(RXERRC); 3709 adapter->stats.tncrs += er32(TNCRS); 3710 adapter->stats.cexterr += er32(CEXTERR); 3711 adapter->stats.tsctc += er32(TSCTC); 3712 adapter->stats.tsctfc += er32(TSCTFC); 3713 } 3714 3715 /* Fill out the OS statistics structure */ 3716 netdev->stats.multicast = adapter->stats.mprc; 3717 netdev->stats.collisions = adapter->stats.colc; 3718 3719 /* Rx Errors */ 3720 3721 /* RLEC on some newer hardware can be incorrect so build 3722 * our own version based on RUC and ROC */ 3723 netdev->stats.rx_errors = adapter->stats.rxerrc + 3724 adapter->stats.crcerrs + adapter->stats.algnerrc + 3725 adapter->stats.ruc + adapter->stats.roc + 3726 adapter->stats.cexterr; 3727 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc; 3728 netdev->stats.rx_length_errors = adapter->stats.rlerrc; 3729 netdev->stats.rx_crc_errors = adapter->stats.crcerrs; 3730 netdev->stats.rx_frame_errors = adapter->stats.algnerrc; 3731 netdev->stats.rx_missed_errors = adapter->stats.mpc; 3732 3733 /* Tx Errors */ 3734 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol; 3735 netdev->stats.tx_errors = adapter->stats.txerrc; 3736 netdev->stats.tx_aborted_errors = adapter->stats.ecol; 3737 netdev->stats.tx_window_errors = adapter->stats.latecol; 3738 netdev->stats.tx_carrier_errors = adapter->stats.tncrs; 3739 if (hw->bad_tx_carr_stats_fd && 3740 adapter->link_duplex == FULL_DUPLEX) { 3741 netdev->stats.tx_carrier_errors = 0; 3742 adapter->stats.tncrs = 0; 3743 } 3744 3745 /* Tx Dropped needs to be maintained elsewhere */ 3746 3747 /* Phy Stats */ 3748 if (hw->media_type == e1000_media_type_copper) { 3749 if ((adapter->link_speed == SPEED_1000) && 3750 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) { 3751 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK; 3752 adapter->phy_stats.idle_errors += phy_tmp; 3753 } 3754 3755 if ((hw->mac_type <= e1000_82546) && 3756 (hw->phy_type == e1000_phy_m88) && 3757 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp)) 3758 adapter->phy_stats.receive_errors += phy_tmp; 3759 } 3760 3761 /* Management Stats */ 3762 if (hw->has_smbus) { 3763 adapter->stats.mgptc += er32(MGTPTC); 3764 adapter->stats.mgprc += er32(MGTPRC); 3765 adapter->stats.mgpdc += er32(MGTPDC); 3766 } 3767 3768 spin_unlock_irqrestore(&adapter->stats_lock, flags); 3769 } 3770 3771 /** 3772 * e1000_intr - Interrupt Handler 3773 * @irq: interrupt number 3774 * @data: pointer to a network interface device structure 3775 **/ 3776 3777 static irqreturn_t e1000_intr(int irq, void *data) 3778 { 3779 struct net_device *netdev = data; 3780 struct e1000_adapter *adapter = netdev_priv(netdev); 3781 struct e1000_hw *hw = &adapter->hw; 3782 u32 icr = er32(ICR); 3783 3784 if (unlikely((!icr))) 3785 return IRQ_NONE; /* Not our interrupt */ 3786 3787 /* 3788 * we might have caused the interrupt, but the above 3789 * read cleared it, and just in case the driver is 3790 * down there is nothing to do so return handled 3791 */ 3792 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags))) 3793 return IRQ_HANDLED; 3794 3795 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) { 3796 hw->get_link_status = 1; 3797 /* guard against interrupt when we're going down */ 3798 if (!test_bit(__E1000_DOWN, &adapter->flags)) 3799 schedule_delayed_work(&adapter->watchdog_task, 1); 3800 } 3801 3802 /* disable interrupts, without the synchronize_irq bit */ 3803 ew32(IMC, ~0); 3804 E1000_WRITE_FLUSH(); 3805 3806 if (likely(napi_schedule_prep(&adapter->napi))) { 3807 adapter->total_tx_bytes = 0; 3808 adapter->total_tx_packets = 0; 3809 adapter->total_rx_bytes = 0; 3810 adapter->total_rx_packets = 0; 3811 __napi_schedule(&adapter->napi); 3812 } else { 3813 /* this really should not happen! if it does it is basically a 3814 * bug, but not a hard error, so enable ints and continue */ 3815 if (!test_bit(__E1000_DOWN, &adapter->flags)) 3816 e1000_irq_enable(adapter); 3817 } 3818 3819 return IRQ_HANDLED; 3820 } 3821 3822 /** 3823 * e1000_clean - NAPI Rx polling callback 3824 * @adapter: board private structure 3825 **/ 3826 static int e1000_clean(struct napi_struct *napi, int budget) 3827 { 3828 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi); 3829 int tx_clean_complete = 0, work_done = 0; 3830 3831 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]); 3832 3833 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget); 3834 3835 if (!tx_clean_complete) 3836 work_done = budget; 3837 3838 /* If budget not fully consumed, exit the polling mode */ 3839 if (work_done < budget) { 3840 if (likely(adapter->itr_setting & 3)) 3841 e1000_set_itr(adapter); 3842 napi_complete(napi); 3843 if (!test_bit(__E1000_DOWN, &adapter->flags)) 3844 e1000_irq_enable(adapter); 3845 } 3846 3847 return work_done; 3848 } 3849 3850 /** 3851 * e1000_clean_tx_irq - Reclaim resources after transmit completes 3852 * @adapter: board private structure 3853 **/ 3854 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, 3855 struct e1000_tx_ring *tx_ring) 3856 { 3857 struct e1000_hw *hw = &adapter->hw; 3858 struct net_device *netdev = adapter->netdev; 3859 struct e1000_tx_desc *tx_desc, *eop_desc; 3860 struct e1000_buffer *buffer_info; 3861 unsigned int i, eop; 3862 unsigned int count = 0; 3863 unsigned int total_tx_bytes=0, total_tx_packets=0; 3864 unsigned int bytes_compl = 0, pkts_compl = 0; 3865 3866 i = tx_ring->next_to_clean; 3867 eop = tx_ring->buffer_info[i].next_to_watch; 3868 eop_desc = E1000_TX_DESC(*tx_ring, eop); 3869 3870 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) && 3871 (count < tx_ring->count)) { 3872 bool cleaned = false; 3873 rmb(); /* read buffer_info after eop_desc */ 3874 for ( ; !cleaned; count++) { 3875 tx_desc = E1000_TX_DESC(*tx_ring, i); 3876 buffer_info = &tx_ring->buffer_info[i]; 3877 cleaned = (i == eop); 3878 3879 if (cleaned) { 3880 total_tx_packets += buffer_info->segs; 3881 total_tx_bytes += buffer_info->bytecount; 3882 if (buffer_info->skb) { 3883 bytes_compl += buffer_info->skb->len; 3884 pkts_compl++; 3885 } 3886 3887 } 3888 e1000_unmap_and_free_tx_resource(adapter, buffer_info); 3889 tx_desc->upper.data = 0; 3890 3891 if (unlikely(++i == tx_ring->count)) i = 0; 3892 } 3893 3894 eop = tx_ring->buffer_info[i].next_to_watch; 3895 eop_desc = E1000_TX_DESC(*tx_ring, eop); 3896 } 3897 3898 tx_ring->next_to_clean = i; 3899 3900 netdev_completed_queue(netdev, pkts_compl, bytes_compl); 3901 3902 #define TX_WAKE_THRESHOLD 32 3903 if (unlikely(count && netif_carrier_ok(netdev) && 3904 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) { 3905 /* Make sure that anybody stopping the queue after this 3906 * sees the new next_to_clean. 3907 */ 3908 smp_mb(); 3909 3910 if (netif_queue_stopped(netdev) && 3911 !(test_bit(__E1000_DOWN, &adapter->flags))) { 3912 netif_wake_queue(netdev); 3913 ++adapter->restart_queue; 3914 } 3915 } 3916 3917 if (adapter->detect_tx_hung) { 3918 /* Detect a transmit hang in hardware, this serializes the 3919 * check with the clearing of time_stamp and movement of i */ 3920 adapter->detect_tx_hung = false; 3921 if (tx_ring->buffer_info[eop].time_stamp && 3922 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + 3923 (adapter->tx_timeout_factor * HZ)) && 3924 !(er32(STATUS) & E1000_STATUS_TXOFF)) { 3925 3926 /* detected Tx unit hang */ 3927 e_err(drv, "Detected Tx Unit Hang\n" 3928 " Tx Queue <%lu>\n" 3929 " TDH <%x>\n" 3930 " TDT <%x>\n" 3931 " next_to_use <%x>\n" 3932 " next_to_clean <%x>\n" 3933 "buffer_info[next_to_clean]\n" 3934 " time_stamp <%lx>\n" 3935 " next_to_watch <%x>\n" 3936 " jiffies <%lx>\n" 3937 " next_to_watch.status <%x>\n", 3938 (unsigned long)((tx_ring - adapter->tx_ring) / 3939 sizeof(struct e1000_tx_ring)), 3940 readl(hw->hw_addr + tx_ring->tdh), 3941 readl(hw->hw_addr + tx_ring->tdt), 3942 tx_ring->next_to_use, 3943 tx_ring->next_to_clean, 3944 tx_ring->buffer_info[eop].time_stamp, 3945 eop, 3946 jiffies, 3947 eop_desc->upper.fields.status); 3948 e1000_dump(adapter); 3949 netif_stop_queue(netdev); 3950 } 3951 } 3952 adapter->total_tx_bytes += total_tx_bytes; 3953 adapter->total_tx_packets += total_tx_packets; 3954 netdev->stats.tx_bytes += total_tx_bytes; 3955 netdev->stats.tx_packets += total_tx_packets; 3956 return count < tx_ring->count; 3957 } 3958 3959 /** 3960 * e1000_rx_checksum - Receive Checksum Offload for 82543 3961 * @adapter: board private structure 3962 * @status_err: receive descriptor status and error fields 3963 * @csum: receive descriptor csum field 3964 * @sk_buff: socket buffer with received data 3965 **/ 3966 3967 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, 3968 u32 csum, struct sk_buff *skb) 3969 { 3970 struct e1000_hw *hw = &adapter->hw; 3971 u16 status = (u16)status_err; 3972 u8 errors = (u8)(status_err >> 24); 3973 3974 skb_checksum_none_assert(skb); 3975 3976 /* 82543 or newer only */ 3977 if (unlikely(hw->mac_type < e1000_82543)) return; 3978 /* Ignore Checksum bit is set */ 3979 if (unlikely(status & E1000_RXD_STAT_IXSM)) return; 3980 /* TCP/UDP checksum error bit is set */ 3981 if (unlikely(errors & E1000_RXD_ERR_TCPE)) { 3982 /* let the stack verify checksum errors */ 3983 adapter->hw_csum_err++; 3984 return; 3985 } 3986 /* TCP/UDP Checksum has not been calculated */ 3987 if (!(status & E1000_RXD_STAT_TCPCS)) 3988 return; 3989 3990 /* It must be a TCP or UDP packet with a valid checksum */ 3991 if (likely(status & E1000_RXD_STAT_TCPCS)) { 3992 /* TCP checksum is good */ 3993 skb->ip_summed = CHECKSUM_UNNECESSARY; 3994 } 3995 adapter->hw_csum_good++; 3996 } 3997 3998 /** 3999 * e1000_consume_page - helper function 4000 **/ 4001 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, 4002 u16 length) 4003 { 4004 bi->page = NULL; 4005 skb->len += length; 4006 skb->data_len += length; 4007 skb->truesize += PAGE_SIZE; 4008 } 4009 4010 /** 4011 * e1000_receive_skb - helper function to handle rx indications 4012 * @adapter: board private structure 4013 * @status: descriptor status field as written by hardware 4014 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) 4015 * @skb: pointer to sk_buff to be indicated to stack 4016 */ 4017 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status, 4018 __le16 vlan, struct sk_buff *skb) 4019 { 4020 skb->protocol = eth_type_trans(skb, adapter->netdev); 4021 4022 if (status & E1000_RXD_STAT_VP) { 4023 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; 4024 4025 __vlan_hwaccel_put_tag(skb, vid); 4026 } 4027 napi_gro_receive(&adapter->napi, skb); 4028 } 4029 4030 /** 4031 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy 4032 * @adapter: board private structure 4033 * @rx_ring: ring to clean 4034 * @work_done: amount of napi work completed this call 4035 * @work_to_do: max amount of work allowed for this call to do 4036 * 4037 * the return value indicates whether actual cleaning was done, there 4038 * is no guarantee that everything was cleaned 4039 */ 4040 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, 4041 struct e1000_rx_ring *rx_ring, 4042 int *work_done, int work_to_do) 4043 { 4044 struct e1000_hw *hw = &adapter->hw; 4045 struct net_device *netdev = adapter->netdev; 4046 struct pci_dev *pdev = adapter->pdev; 4047 struct e1000_rx_desc *rx_desc, *next_rxd; 4048 struct e1000_buffer *buffer_info, *next_buffer; 4049 unsigned long irq_flags; 4050 u32 length; 4051 unsigned int i; 4052 int cleaned_count = 0; 4053 bool cleaned = false; 4054 unsigned int total_rx_bytes=0, total_rx_packets=0; 4055 4056 i = rx_ring->next_to_clean; 4057 rx_desc = E1000_RX_DESC(*rx_ring, i); 4058 buffer_info = &rx_ring->buffer_info[i]; 4059 4060 while (rx_desc->status & E1000_RXD_STAT_DD) { 4061 struct sk_buff *skb; 4062 u8 status; 4063 4064 if (*work_done >= work_to_do) 4065 break; 4066 (*work_done)++; 4067 rmb(); /* read descriptor and rx_buffer_info after status DD */ 4068 4069 status = rx_desc->status; 4070 skb = buffer_info->skb; 4071 buffer_info->skb = NULL; 4072 4073 if (++i == rx_ring->count) i = 0; 4074 next_rxd = E1000_RX_DESC(*rx_ring, i); 4075 prefetch(next_rxd); 4076 4077 next_buffer = &rx_ring->buffer_info[i]; 4078 4079 cleaned = true; 4080 cleaned_count++; 4081 dma_unmap_page(&pdev->dev, buffer_info->dma, 4082 buffer_info->length, DMA_FROM_DEVICE); 4083 buffer_info->dma = 0; 4084 4085 length = le16_to_cpu(rx_desc->length); 4086 4087 /* errors is only valid for DD + EOP descriptors */ 4088 if (unlikely((status & E1000_RXD_STAT_EOP) && 4089 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) { 4090 u8 *mapped; 4091 u8 last_byte; 4092 4093 mapped = page_address(buffer_info->page); 4094 last_byte = *(mapped + length - 1); 4095 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, 4096 last_byte)) { 4097 spin_lock_irqsave(&adapter->stats_lock, 4098 irq_flags); 4099 e1000_tbi_adjust_stats(hw, &adapter->stats, 4100 length, mapped); 4101 spin_unlock_irqrestore(&adapter->stats_lock, 4102 irq_flags); 4103 length--; 4104 } else { 4105 if (netdev->features & NETIF_F_RXALL) 4106 goto process_skb; 4107 /* recycle both page and skb */ 4108 buffer_info->skb = skb; 4109 /* an error means any chain goes out the window 4110 * too */ 4111 if (rx_ring->rx_skb_top) 4112 dev_kfree_skb(rx_ring->rx_skb_top); 4113 rx_ring->rx_skb_top = NULL; 4114 goto next_desc; 4115 } 4116 } 4117 4118 #define rxtop rx_ring->rx_skb_top 4119 process_skb: 4120 if (!(status & E1000_RXD_STAT_EOP)) { 4121 /* this descriptor is only the beginning (or middle) */ 4122 if (!rxtop) { 4123 /* this is the beginning of a chain */ 4124 rxtop = skb; 4125 skb_fill_page_desc(rxtop, 0, buffer_info->page, 4126 0, length); 4127 } else { 4128 /* this is the middle of a chain */ 4129 skb_fill_page_desc(rxtop, 4130 skb_shinfo(rxtop)->nr_frags, 4131 buffer_info->page, 0, length); 4132 /* re-use the skb, only consumed the page */ 4133 buffer_info->skb = skb; 4134 } 4135 e1000_consume_page(buffer_info, rxtop, length); 4136 goto next_desc; 4137 } else { 4138 if (rxtop) { 4139 /* end of the chain */ 4140 skb_fill_page_desc(rxtop, 4141 skb_shinfo(rxtop)->nr_frags, 4142 buffer_info->page, 0, length); 4143 /* re-use the current skb, we only consumed the 4144 * page */ 4145 buffer_info->skb = skb; 4146 skb = rxtop; 4147 rxtop = NULL; 4148 e1000_consume_page(buffer_info, skb, length); 4149 } else { 4150 /* no chain, got EOP, this buf is the packet 4151 * copybreak to save the put_page/alloc_page */ 4152 if (length <= copybreak && 4153 skb_tailroom(skb) >= length) { 4154 u8 *vaddr; 4155 vaddr = kmap_atomic(buffer_info->page); 4156 memcpy(skb_tail_pointer(skb), vaddr, length); 4157 kunmap_atomic(vaddr); 4158 /* re-use the page, so don't erase 4159 * buffer_info->page */ 4160 skb_put(skb, length); 4161 } else { 4162 skb_fill_page_desc(skb, 0, 4163 buffer_info->page, 0, 4164 length); 4165 e1000_consume_page(buffer_info, skb, 4166 length); 4167 } 4168 } 4169 } 4170 4171 /* Receive Checksum Offload XXX recompute due to CRC strip? */ 4172 e1000_rx_checksum(adapter, 4173 (u32)(status) | 4174 ((u32)(rx_desc->errors) << 24), 4175 le16_to_cpu(rx_desc->csum), skb); 4176 4177 total_rx_bytes += (skb->len - 4); /* don't count FCS */ 4178 if (likely(!(netdev->features & NETIF_F_RXFCS))) 4179 pskb_trim(skb, skb->len - 4); 4180 total_rx_packets++; 4181 4182 /* eth type trans needs skb->data to point to something */ 4183 if (!pskb_may_pull(skb, ETH_HLEN)) { 4184 e_err(drv, "pskb_may_pull failed.\n"); 4185 dev_kfree_skb(skb); 4186 goto next_desc; 4187 } 4188 4189 e1000_receive_skb(adapter, status, rx_desc->special, skb); 4190 4191 next_desc: 4192 rx_desc->status = 0; 4193 4194 /* return some buffers to hardware, one at a time is too slow */ 4195 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { 4196 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); 4197 cleaned_count = 0; 4198 } 4199 4200 /* use prefetched values */ 4201 rx_desc = next_rxd; 4202 buffer_info = next_buffer; 4203 } 4204 rx_ring->next_to_clean = i; 4205 4206 cleaned_count = E1000_DESC_UNUSED(rx_ring); 4207 if (cleaned_count) 4208 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); 4209 4210 adapter->total_rx_packets += total_rx_packets; 4211 adapter->total_rx_bytes += total_rx_bytes; 4212 netdev->stats.rx_bytes += total_rx_bytes; 4213 netdev->stats.rx_packets += total_rx_packets; 4214 return cleaned; 4215 } 4216 4217 /* 4218 * this should improve performance for small packets with large amounts 4219 * of reassembly being done in the stack 4220 */ 4221 static void e1000_check_copybreak(struct net_device *netdev, 4222 struct e1000_buffer *buffer_info, 4223 u32 length, struct sk_buff **skb) 4224 { 4225 struct sk_buff *new_skb; 4226 4227 if (length > copybreak) 4228 return; 4229 4230 new_skb = netdev_alloc_skb_ip_align(netdev, length); 4231 if (!new_skb) 4232 return; 4233 4234 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN, 4235 (*skb)->data - NET_IP_ALIGN, 4236 length + NET_IP_ALIGN); 4237 /* save the skb in buffer_info as good */ 4238 buffer_info->skb = *skb; 4239 *skb = new_skb; 4240 } 4241 4242 /** 4243 * e1000_clean_rx_irq - Send received data up the network stack; legacy 4244 * @adapter: board private structure 4245 * @rx_ring: ring to clean 4246 * @work_done: amount of napi work completed this call 4247 * @work_to_do: max amount of work allowed for this call to do 4248 */ 4249 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, 4250 struct e1000_rx_ring *rx_ring, 4251 int *work_done, int work_to_do) 4252 { 4253 struct e1000_hw *hw = &adapter->hw; 4254 struct net_device *netdev = adapter->netdev; 4255 struct pci_dev *pdev = adapter->pdev; 4256 struct e1000_rx_desc *rx_desc, *next_rxd; 4257 struct e1000_buffer *buffer_info, *next_buffer; 4258 unsigned long flags; 4259 u32 length; 4260 unsigned int i; 4261 int cleaned_count = 0; 4262 bool cleaned = false; 4263 unsigned int total_rx_bytes=0, total_rx_packets=0; 4264 4265 i = rx_ring->next_to_clean; 4266 rx_desc = E1000_RX_DESC(*rx_ring, i); 4267 buffer_info = &rx_ring->buffer_info[i]; 4268 4269 while (rx_desc->status & E1000_RXD_STAT_DD) { 4270 struct sk_buff *skb; 4271 u8 status; 4272 4273 if (*work_done >= work_to_do) 4274 break; 4275 (*work_done)++; 4276 rmb(); /* read descriptor and rx_buffer_info after status DD */ 4277 4278 status = rx_desc->status; 4279 skb = buffer_info->skb; 4280 buffer_info->skb = NULL; 4281 4282 prefetch(skb->data - NET_IP_ALIGN); 4283 4284 if (++i == rx_ring->count) i = 0; 4285 next_rxd = E1000_RX_DESC(*rx_ring, i); 4286 prefetch(next_rxd); 4287 4288 next_buffer = &rx_ring->buffer_info[i]; 4289 4290 cleaned = true; 4291 cleaned_count++; 4292 dma_unmap_single(&pdev->dev, buffer_info->dma, 4293 buffer_info->length, DMA_FROM_DEVICE); 4294 buffer_info->dma = 0; 4295 4296 length = le16_to_cpu(rx_desc->length); 4297 /* !EOP means multiple descriptors were used to store a single 4298 * packet, if thats the case we need to toss it. In fact, we 4299 * to toss every packet with the EOP bit clear and the next 4300 * frame that _does_ have the EOP bit set, as it is by 4301 * definition only a frame fragment 4302 */ 4303 if (unlikely(!(status & E1000_RXD_STAT_EOP))) 4304 adapter->discarding = true; 4305 4306 if (adapter->discarding) { 4307 /* All receives must fit into a single buffer */ 4308 e_dbg("Receive packet consumed multiple buffers\n"); 4309 /* recycle */ 4310 buffer_info->skb = skb; 4311 if (status & E1000_RXD_STAT_EOP) 4312 adapter->discarding = false; 4313 goto next_desc; 4314 } 4315 4316 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) { 4317 u8 last_byte = *(skb->data + length - 1); 4318 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, 4319 last_byte)) { 4320 spin_lock_irqsave(&adapter->stats_lock, flags); 4321 e1000_tbi_adjust_stats(hw, &adapter->stats, 4322 length, skb->data); 4323 spin_unlock_irqrestore(&adapter->stats_lock, 4324 flags); 4325 length--; 4326 } else { 4327 if (netdev->features & NETIF_F_RXALL) 4328 goto process_skb; 4329 /* recycle */ 4330 buffer_info->skb = skb; 4331 goto next_desc; 4332 } 4333 } 4334 4335 process_skb: 4336 total_rx_bytes += (length - 4); /* don't count FCS */ 4337 total_rx_packets++; 4338 4339 if (likely(!(netdev->features & NETIF_F_RXFCS))) 4340 /* adjust length to remove Ethernet CRC, this must be 4341 * done after the TBI_ACCEPT workaround above 4342 */ 4343 length -= 4; 4344 4345 e1000_check_copybreak(netdev, buffer_info, length, &skb); 4346 4347 skb_put(skb, length); 4348 4349 /* Receive Checksum Offload */ 4350 e1000_rx_checksum(adapter, 4351 (u32)(status) | 4352 ((u32)(rx_desc->errors) << 24), 4353 le16_to_cpu(rx_desc->csum), skb); 4354 4355 e1000_receive_skb(adapter, status, rx_desc->special, skb); 4356 4357 next_desc: 4358 rx_desc->status = 0; 4359 4360 /* return some buffers to hardware, one at a time is too slow */ 4361 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { 4362 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); 4363 cleaned_count = 0; 4364 } 4365 4366 /* use prefetched values */ 4367 rx_desc = next_rxd; 4368 buffer_info = next_buffer; 4369 } 4370 rx_ring->next_to_clean = i; 4371 4372 cleaned_count = E1000_DESC_UNUSED(rx_ring); 4373 if (cleaned_count) 4374 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); 4375 4376 adapter->total_rx_packets += total_rx_packets; 4377 adapter->total_rx_bytes += total_rx_bytes; 4378 netdev->stats.rx_bytes += total_rx_bytes; 4379 netdev->stats.rx_packets += total_rx_packets; 4380 return cleaned; 4381 } 4382 4383 /** 4384 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers 4385 * @adapter: address of board private structure 4386 * @rx_ring: pointer to receive ring structure 4387 * @cleaned_count: number of buffers to allocate this pass 4388 **/ 4389 4390 static void 4391 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, 4392 struct e1000_rx_ring *rx_ring, int cleaned_count) 4393 { 4394 struct net_device *netdev = adapter->netdev; 4395 struct pci_dev *pdev = adapter->pdev; 4396 struct e1000_rx_desc *rx_desc; 4397 struct e1000_buffer *buffer_info; 4398 struct sk_buff *skb; 4399 unsigned int i; 4400 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ; 4401 4402 i = rx_ring->next_to_use; 4403 buffer_info = &rx_ring->buffer_info[i]; 4404 4405 while (cleaned_count--) { 4406 skb = buffer_info->skb; 4407 if (skb) { 4408 skb_trim(skb, 0); 4409 goto check_page; 4410 } 4411 4412 skb = netdev_alloc_skb_ip_align(netdev, bufsz); 4413 if (unlikely(!skb)) { 4414 /* Better luck next round */ 4415 adapter->alloc_rx_buff_failed++; 4416 break; 4417 } 4418 4419 buffer_info->skb = skb; 4420 buffer_info->length = adapter->rx_buffer_len; 4421 check_page: 4422 /* allocate a new page if necessary */ 4423 if (!buffer_info->page) { 4424 buffer_info->page = alloc_page(GFP_ATOMIC); 4425 if (unlikely(!buffer_info->page)) { 4426 adapter->alloc_rx_buff_failed++; 4427 break; 4428 } 4429 } 4430 4431 if (!buffer_info->dma) { 4432 buffer_info->dma = dma_map_page(&pdev->dev, 4433 buffer_info->page, 0, 4434 buffer_info->length, 4435 DMA_FROM_DEVICE); 4436 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 4437 put_page(buffer_info->page); 4438 dev_kfree_skb(skb); 4439 buffer_info->page = NULL; 4440 buffer_info->skb = NULL; 4441 buffer_info->dma = 0; 4442 adapter->alloc_rx_buff_failed++; 4443 break; /* while !buffer_info->skb */ 4444 } 4445 } 4446 4447 rx_desc = E1000_RX_DESC(*rx_ring, i); 4448 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 4449 4450 if (unlikely(++i == rx_ring->count)) 4451 i = 0; 4452 buffer_info = &rx_ring->buffer_info[i]; 4453 } 4454 4455 if (likely(rx_ring->next_to_use != i)) { 4456 rx_ring->next_to_use = i; 4457 if (unlikely(i-- == 0)) 4458 i = (rx_ring->count - 1); 4459 4460 /* Force memory writes to complete before letting h/w 4461 * know there are new descriptors to fetch. (Only 4462 * applicable for weak-ordered memory model archs, 4463 * such as IA-64). */ 4464 wmb(); 4465 writel(i, adapter->hw.hw_addr + rx_ring->rdt); 4466 } 4467 } 4468 4469 /** 4470 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended 4471 * @adapter: address of board private structure 4472 **/ 4473 4474 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, 4475 struct e1000_rx_ring *rx_ring, 4476 int cleaned_count) 4477 { 4478 struct e1000_hw *hw = &adapter->hw; 4479 struct net_device *netdev = adapter->netdev; 4480 struct pci_dev *pdev = adapter->pdev; 4481 struct e1000_rx_desc *rx_desc; 4482 struct e1000_buffer *buffer_info; 4483 struct sk_buff *skb; 4484 unsigned int i; 4485 unsigned int bufsz = adapter->rx_buffer_len; 4486 4487 i = rx_ring->next_to_use; 4488 buffer_info = &rx_ring->buffer_info[i]; 4489 4490 while (cleaned_count--) { 4491 skb = buffer_info->skb; 4492 if (skb) { 4493 skb_trim(skb, 0); 4494 goto map_skb; 4495 } 4496 4497 skb = netdev_alloc_skb_ip_align(netdev, bufsz); 4498 if (unlikely(!skb)) { 4499 /* Better luck next round */ 4500 adapter->alloc_rx_buff_failed++; 4501 break; 4502 } 4503 4504 /* Fix for errata 23, can't cross 64kB boundary */ 4505 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { 4506 struct sk_buff *oldskb = skb; 4507 e_err(rx_err, "skb align check failed: %u bytes at " 4508 "%p\n", bufsz, skb->data); 4509 /* Try again, without freeing the previous */ 4510 skb = netdev_alloc_skb_ip_align(netdev, bufsz); 4511 /* Failed allocation, critical failure */ 4512 if (!skb) { 4513 dev_kfree_skb(oldskb); 4514 adapter->alloc_rx_buff_failed++; 4515 break; 4516 } 4517 4518 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { 4519 /* give up */ 4520 dev_kfree_skb(skb); 4521 dev_kfree_skb(oldskb); 4522 adapter->alloc_rx_buff_failed++; 4523 break; /* while !buffer_info->skb */ 4524 } 4525 4526 /* Use new allocation */ 4527 dev_kfree_skb(oldskb); 4528 } 4529 buffer_info->skb = skb; 4530 buffer_info->length = adapter->rx_buffer_len; 4531 map_skb: 4532 buffer_info->dma = dma_map_single(&pdev->dev, 4533 skb->data, 4534 buffer_info->length, 4535 DMA_FROM_DEVICE); 4536 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 4537 dev_kfree_skb(skb); 4538 buffer_info->skb = NULL; 4539 buffer_info->dma = 0; 4540 adapter->alloc_rx_buff_failed++; 4541 break; /* while !buffer_info->skb */ 4542 } 4543 4544 /* 4545 * XXX if it was allocated cleanly it will never map to a 4546 * boundary crossing 4547 */ 4548 4549 /* Fix for errata 23, can't cross 64kB boundary */ 4550 if (!e1000_check_64k_bound(adapter, 4551 (void *)(unsigned long)buffer_info->dma, 4552 adapter->rx_buffer_len)) { 4553 e_err(rx_err, "dma align check failed: %u bytes at " 4554 "%p\n", adapter->rx_buffer_len, 4555 (void *)(unsigned long)buffer_info->dma); 4556 dev_kfree_skb(skb); 4557 buffer_info->skb = NULL; 4558 4559 dma_unmap_single(&pdev->dev, buffer_info->dma, 4560 adapter->rx_buffer_len, 4561 DMA_FROM_DEVICE); 4562 buffer_info->dma = 0; 4563 4564 adapter->alloc_rx_buff_failed++; 4565 break; /* while !buffer_info->skb */ 4566 } 4567 rx_desc = E1000_RX_DESC(*rx_ring, i); 4568 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 4569 4570 if (unlikely(++i == rx_ring->count)) 4571 i = 0; 4572 buffer_info = &rx_ring->buffer_info[i]; 4573 } 4574 4575 if (likely(rx_ring->next_to_use != i)) { 4576 rx_ring->next_to_use = i; 4577 if (unlikely(i-- == 0)) 4578 i = (rx_ring->count - 1); 4579 4580 /* Force memory writes to complete before letting h/w 4581 * know there are new descriptors to fetch. (Only 4582 * applicable for weak-ordered memory model archs, 4583 * such as IA-64). */ 4584 wmb(); 4585 writel(i, hw->hw_addr + rx_ring->rdt); 4586 } 4587 } 4588 4589 /** 4590 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers. 4591 * @adapter: 4592 **/ 4593 4594 static void e1000_smartspeed(struct e1000_adapter *adapter) 4595 { 4596 struct e1000_hw *hw = &adapter->hw; 4597 u16 phy_status; 4598 u16 phy_ctrl; 4599 4600 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg || 4601 !(hw->autoneg_advertised & ADVERTISE_1000_FULL)) 4602 return; 4603 4604 if (adapter->smartspeed == 0) { 4605 /* If Master/Slave config fault is asserted twice, 4606 * we assume back-to-back */ 4607 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); 4608 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; 4609 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); 4610 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; 4611 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); 4612 if (phy_ctrl & CR_1000T_MS_ENABLE) { 4613 phy_ctrl &= ~CR_1000T_MS_ENABLE; 4614 e1000_write_phy_reg(hw, PHY_1000T_CTRL, 4615 phy_ctrl); 4616 adapter->smartspeed++; 4617 if (!e1000_phy_setup_autoneg(hw) && 4618 !e1000_read_phy_reg(hw, PHY_CTRL, 4619 &phy_ctrl)) { 4620 phy_ctrl |= (MII_CR_AUTO_NEG_EN | 4621 MII_CR_RESTART_AUTO_NEG); 4622 e1000_write_phy_reg(hw, PHY_CTRL, 4623 phy_ctrl); 4624 } 4625 } 4626 return; 4627 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) { 4628 /* If still no link, perhaps using 2/3 pair cable */ 4629 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); 4630 phy_ctrl |= CR_1000T_MS_ENABLE; 4631 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl); 4632 if (!e1000_phy_setup_autoneg(hw) && 4633 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) { 4634 phy_ctrl |= (MII_CR_AUTO_NEG_EN | 4635 MII_CR_RESTART_AUTO_NEG); 4636 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl); 4637 } 4638 } 4639 /* Restart process after E1000_SMARTSPEED_MAX iterations */ 4640 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX) 4641 adapter->smartspeed = 0; 4642 } 4643 4644 /** 4645 * e1000_ioctl - 4646 * @netdev: 4647 * @ifreq: 4648 * @cmd: 4649 **/ 4650 4651 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 4652 { 4653 switch (cmd) { 4654 case SIOCGMIIPHY: 4655 case SIOCGMIIREG: 4656 case SIOCSMIIREG: 4657 return e1000_mii_ioctl(netdev, ifr, cmd); 4658 default: 4659 return -EOPNOTSUPP; 4660 } 4661 } 4662 4663 /** 4664 * e1000_mii_ioctl - 4665 * @netdev: 4666 * @ifreq: 4667 * @cmd: 4668 **/ 4669 4670 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, 4671 int cmd) 4672 { 4673 struct e1000_adapter *adapter = netdev_priv(netdev); 4674 struct e1000_hw *hw = &adapter->hw; 4675 struct mii_ioctl_data *data = if_mii(ifr); 4676 int retval; 4677 u16 mii_reg; 4678 unsigned long flags; 4679 4680 if (hw->media_type != e1000_media_type_copper) 4681 return -EOPNOTSUPP; 4682 4683 switch (cmd) { 4684 case SIOCGMIIPHY: 4685 data->phy_id = hw->phy_addr; 4686 break; 4687 case SIOCGMIIREG: 4688 spin_lock_irqsave(&adapter->stats_lock, flags); 4689 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F, 4690 &data->val_out)) { 4691 spin_unlock_irqrestore(&adapter->stats_lock, flags); 4692 return -EIO; 4693 } 4694 spin_unlock_irqrestore(&adapter->stats_lock, flags); 4695 break; 4696 case SIOCSMIIREG: 4697 if (data->reg_num & ~(0x1F)) 4698 return -EFAULT; 4699 mii_reg = data->val_in; 4700 spin_lock_irqsave(&adapter->stats_lock, flags); 4701 if (e1000_write_phy_reg(hw, data->reg_num, 4702 mii_reg)) { 4703 spin_unlock_irqrestore(&adapter->stats_lock, flags); 4704 return -EIO; 4705 } 4706 spin_unlock_irqrestore(&adapter->stats_lock, flags); 4707 if (hw->media_type == e1000_media_type_copper) { 4708 switch (data->reg_num) { 4709 case PHY_CTRL: 4710 if (mii_reg & MII_CR_POWER_DOWN) 4711 break; 4712 if (mii_reg & MII_CR_AUTO_NEG_EN) { 4713 hw->autoneg = 1; 4714 hw->autoneg_advertised = 0x2F; 4715 } else { 4716 u32 speed; 4717 if (mii_reg & 0x40) 4718 speed = SPEED_1000; 4719 else if (mii_reg & 0x2000) 4720 speed = SPEED_100; 4721 else 4722 speed = SPEED_10; 4723 retval = e1000_set_spd_dplx( 4724 adapter, speed, 4725 ((mii_reg & 0x100) 4726 ? DUPLEX_FULL : 4727 DUPLEX_HALF)); 4728 if (retval) 4729 return retval; 4730 } 4731 if (netif_running(adapter->netdev)) 4732 e1000_reinit_locked(adapter); 4733 else 4734 e1000_reset(adapter); 4735 break; 4736 case M88E1000_PHY_SPEC_CTRL: 4737 case M88E1000_EXT_PHY_SPEC_CTRL: 4738 if (e1000_phy_reset(hw)) 4739 return -EIO; 4740 break; 4741 } 4742 } else { 4743 switch (data->reg_num) { 4744 case PHY_CTRL: 4745 if (mii_reg & MII_CR_POWER_DOWN) 4746 break; 4747 if (netif_running(adapter->netdev)) 4748 e1000_reinit_locked(adapter); 4749 else 4750 e1000_reset(adapter); 4751 break; 4752 } 4753 } 4754 break; 4755 default: 4756 return -EOPNOTSUPP; 4757 } 4758 return E1000_SUCCESS; 4759 } 4760 4761 void e1000_pci_set_mwi(struct e1000_hw *hw) 4762 { 4763 struct e1000_adapter *adapter = hw->back; 4764 int ret_val = pci_set_mwi(adapter->pdev); 4765 4766 if (ret_val) 4767 e_err(probe, "Error in setting MWI\n"); 4768 } 4769 4770 void e1000_pci_clear_mwi(struct e1000_hw *hw) 4771 { 4772 struct e1000_adapter *adapter = hw->back; 4773 4774 pci_clear_mwi(adapter->pdev); 4775 } 4776 4777 int e1000_pcix_get_mmrbc(struct e1000_hw *hw) 4778 { 4779 struct e1000_adapter *adapter = hw->back; 4780 return pcix_get_mmrbc(adapter->pdev); 4781 } 4782 4783 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc) 4784 { 4785 struct e1000_adapter *adapter = hw->back; 4786 pcix_set_mmrbc(adapter->pdev, mmrbc); 4787 } 4788 4789 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value) 4790 { 4791 outl(value, port); 4792 } 4793 4794 static bool e1000_vlan_used(struct e1000_adapter *adapter) 4795 { 4796 u16 vid; 4797 4798 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 4799 return true; 4800 return false; 4801 } 4802 4803 static void __e1000_vlan_mode(struct e1000_adapter *adapter, 4804 netdev_features_t features) 4805 { 4806 struct e1000_hw *hw = &adapter->hw; 4807 u32 ctrl; 4808 4809 ctrl = er32(CTRL); 4810 if (features & NETIF_F_HW_VLAN_RX) { 4811 /* enable VLAN tag insert/strip */ 4812 ctrl |= E1000_CTRL_VME; 4813 } else { 4814 /* disable VLAN tag insert/strip */ 4815 ctrl &= ~E1000_CTRL_VME; 4816 } 4817 ew32(CTRL, ctrl); 4818 } 4819 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter, 4820 bool filter_on) 4821 { 4822 struct e1000_hw *hw = &adapter->hw; 4823 u32 rctl; 4824 4825 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4826 e1000_irq_disable(adapter); 4827 4828 __e1000_vlan_mode(adapter, adapter->netdev->features); 4829 if (filter_on) { 4830 /* enable VLAN receive filtering */ 4831 rctl = er32(RCTL); 4832 rctl &= ~E1000_RCTL_CFIEN; 4833 if (!(adapter->netdev->flags & IFF_PROMISC)) 4834 rctl |= E1000_RCTL_VFE; 4835 ew32(RCTL, rctl); 4836 e1000_update_mng_vlan(adapter); 4837 } else { 4838 /* disable VLAN receive filtering */ 4839 rctl = er32(RCTL); 4840 rctl &= ~E1000_RCTL_VFE; 4841 ew32(RCTL, rctl); 4842 } 4843 4844 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4845 e1000_irq_enable(adapter); 4846 } 4847 4848 static void e1000_vlan_mode(struct net_device *netdev, 4849 netdev_features_t features) 4850 { 4851 struct e1000_adapter *adapter = netdev_priv(netdev); 4852 4853 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4854 e1000_irq_disable(adapter); 4855 4856 __e1000_vlan_mode(adapter, features); 4857 4858 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4859 e1000_irq_enable(adapter); 4860 } 4861 4862 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 4863 { 4864 struct e1000_adapter *adapter = netdev_priv(netdev); 4865 struct e1000_hw *hw = &adapter->hw; 4866 u32 vfta, index; 4867 4868 if ((hw->mng_cookie.status & 4869 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && 4870 (vid == adapter->mng_vlan_id)) 4871 return 0; 4872 4873 if (!e1000_vlan_used(adapter)) 4874 e1000_vlan_filter_on_off(adapter, true); 4875 4876 /* add VID to filter table */ 4877 index = (vid >> 5) & 0x7F; 4878 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); 4879 vfta |= (1 << (vid & 0x1F)); 4880 e1000_write_vfta(hw, index, vfta); 4881 4882 set_bit(vid, adapter->active_vlans); 4883 4884 return 0; 4885 } 4886 4887 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 4888 { 4889 struct e1000_adapter *adapter = netdev_priv(netdev); 4890 struct e1000_hw *hw = &adapter->hw; 4891 u32 vfta, index; 4892 4893 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4894 e1000_irq_disable(adapter); 4895 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4896 e1000_irq_enable(adapter); 4897 4898 /* remove VID from filter table */ 4899 index = (vid >> 5) & 0x7F; 4900 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); 4901 vfta &= ~(1 << (vid & 0x1F)); 4902 e1000_write_vfta(hw, index, vfta); 4903 4904 clear_bit(vid, adapter->active_vlans); 4905 4906 if (!e1000_vlan_used(adapter)) 4907 e1000_vlan_filter_on_off(adapter, false); 4908 4909 return 0; 4910 } 4911 4912 static void e1000_restore_vlan(struct e1000_adapter *adapter) 4913 { 4914 u16 vid; 4915 4916 if (!e1000_vlan_used(adapter)) 4917 return; 4918 4919 e1000_vlan_filter_on_off(adapter, true); 4920 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 4921 e1000_vlan_rx_add_vid(adapter->netdev, vid); 4922 } 4923 4924 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx) 4925 { 4926 struct e1000_hw *hw = &adapter->hw; 4927 4928 hw->autoneg = 0; 4929 4930 /* Make sure dplx is at most 1 bit and lsb of speed is not set 4931 * for the switch() below to work */ 4932 if ((spd & 1) || (dplx & ~1)) 4933 goto err_inval; 4934 4935 /* Fiber NICs only allow 1000 gbps Full duplex */ 4936 if ((hw->media_type == e1000_media_type_fiber) && 4937 spd != SPEED_1000 && 4938 dplx != DUPLEX_FULL) 4939 goto err_inval; 4940 4941 switch (spd + dplx) { 4942 case SPEED_10 + DUPLEX_HALF: 4943 hw->forced_speed_duplex = e1000_10_half; 4944 break; 4945 case SPEED_10 + DUPLEX_FULL: 4946 hw->forced_speed_duplex = e1000_10_full; 4947 break; 4948 case SPEED_100 + DUPLEX_HALF: 4949 hw->forced_speed_duplex = e1000_100_half; 4950 break; 4951 case SPEED_100 + DUPLEX_FULL: 4952 hw->forced_speed_duplex = e1000_100_full; 4953 break; 4954 case SPEED_1000 + DUPLEX_FULL: 4955 hw->autoneg = 1; 4956 hw->autoneg_advertised = ADVERTISE_1000_FULL; 4957 break; 4958 case SPEED_1000 + DUPLEX_HALF: /* not supported */ 4959 default: 4960 goto err_inval; 4961 } 4962 4963 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */ 4964 hw->mdix = AUTO_ALL_MODES; 4965 4966 return 0; 4967 4968 err_inval: 4969 e_err(probe, "Unsupported Speed/Duplex configuration\n"); 4970 return -EINVAL; 4971 } 4972 4973 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake) 4974 { 4975 struct net_device *netdev = pci_get_drvdata(pdev); 4976 struct e1000_adapter *adapter = netdev_priv(netdev); 4977 struct e1000_hw *hw = &adapter->hw; 4978 u32 ctrl, ctrl_ext, rctl, status; 4979 u32 wufc = adapter->wol; 4980 #ifdef CONFIG_PM 4981 int retval = 0; 4982 #endif 4983 4984 netif_device_detach(netdev); 4985 4986 if (netif_running(netdev)) { 4987 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); 4988 e1000_down(adapter); 4989 } 4990 4991 #ifdef CONFIG_PM 4992 retval = pci_save_state(pdev); 4993 if (retval) 4994 return retval; 4995 #endif 4996 4997 status = er32(STATUS); 4998 if (status & E1000_STATUS_LU) 4999 wufc &= ~E1000_WUFC_LNKC; 5000 5001 if (wufc) { 5002 e1000_setup_rctl(adapter); 5003 e1000_set_rx_mode(netdev); 5004 5005 rctl = er32(RCTL); 5006 5007 /* turn on all-multi mode if wake on multicast is enabled */ 5008 if (wufc & E1000_WUFC_MC) 5009 rctl |= E1000_RCTL_MPE; 5010 5011 /* enable receives in the hardware */ 5012 ew32(RCTL, rctl | E1000_RCTL_EN); 5013 5014 if (hw->mac_type >= e1000_82540) { 5015 ctrl = er32(CTRL); 5016 /* advertise wake from D3Cold */ 5017 #define E1000_CTRL_ADVD3WUC 0x00100000 5018 /* phy power management enable */ 5019 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000 5020 ctrl |= E1000_CTRL_ADVD3WUC | 5021 E1000_CTRL_EN_PHY_PWR_MGMT; 5022 ew32(CTRL, ctrl); 5023 } 5024 5025 if (hw->media_type == e1000_media_type_fiber || 5026 hw->media_type == e1000_media_type_internal_serdes) { 5027 /* keep the laser running in D3 */ 5028 ctrl_ext = er32(CTRL_EXT); 5029 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA; 5030 ew32(CTRL_EXT, ctrl_ext); 5031 } 5032 5033 ew32(WUC, E1000_WUC_PME_EN); 5034 ew32(WUFC, wufc); 5035 } else { 5036 ew32(WUC, 0); 5037 ew32(WUFC, 0); 5038 } 5039 5040 e1000_release_manageability(adapter); 5041 5042 *enable_wake = !!wufc; 5043 5044 /* make sure adapter isn't asleep if manageability is enabled */ 5045 if (adapter->en_mng_pt) 5046 *enable_wake = true; 5047 5048 if (netif_running(netdev)) 5049 e1000_free_irq(adapter); 5050 5051 pci_disable_device(pdev); 5052 5053 return 0; 5054 } 5055 5056 #ifdef CONFIG_PM 5057 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state) 5058 { 5059 int retval; 5060 bool wake; 5061 5062 retval = __e1000_shutdown(pdev, &wake); 5063 if (retval) 5064 return retval; 5065 5066 if (wake) { 5067 pci_prepare_to_sleep(pdev); 5068 } else { 5069 pci_wake_from_d3(pdev, false); 5070 pci_set_power_state(pdev, PCI_D3hot); 5071 } 5072 5073 return 0; 5074 } 5075 5076 static int e1000_resume(struct pci_dev *pdev) 5077 { 5078 struct net_device *netdev = pci_get_drvdata(pdev); 5079 struct e1000_adapter *adapter = netdev_priv(netdev); 5080 struct e1000_hw *hw = &adapter->hw; 5081 u32 err; 5082 5083 pci_set_power_state(pdev, PCI_D0); 5084 pci_restore_state(pdev); 5085 pci_save_state(pdev); 5086 5087 if (adapter->need_ioport) 5088 err = pci_enable_device(pdev); 5089 else 5090 err = pci_enable_device_mem(pdev); 5091 if (err) { 5092 pr_err("Cannot enable PCI device from suspend\n"); 5093 return err; 5094 } 5095 pci_set_master(pdev); 5096 5097 pci_enable_wake(pdev, PCI_D3hot, 0); 5098 pci_enable_wake(pdev, PCI_D3cold, 0); 5099 5100 if (netif_running(netdev)) { 5101 err = e1000_request_irq(adapter); 5102 if (err) 5103 return err; 5104 } 5105 5106 e1000_power_up_phy(adapter); 5107 e1000_reset(adapter); 5108 ew32(WUS, ~0); 5109 5110 e1000_init_manageability(adapter); 5111 5112 if (netif_running(netdev)) 5113 e1000_up(adapter); 5114 5115 netif_device_attach(netdev); 5116 5117 return 0; 5118 } 5119 #endif 5120 5121 static void e1000_shutdown(struct pci_dev *pdev) 5122 { 5123 bool wake; 5124 5125 __e1000_shutdown(pdev, &wake); 5126 5127 if (system_state == SYSTEM_POWER_OFF) { 5128 pci_wake_from_d3(pdev, wake); 5129 pci_set_power_state(pdev, PCI_D3hot); 5130 } 5131 } 5132 5133 #ifdef CONFIG_NET_POLL_CONTROLLER 5134 /* 5135 * Polling 'interrupt' - used by things like netconsole to send skbs 5136 * without having to re-enable interrupts. It's not called while 5137 * the interrupt routine is executing. 5138 */ 5139 static void e1000_netpoll(struct net_device *netdev) 5140 { 5141 struct e1000_adapter *adapter = netdev_priv(netdev); 5142 5143 disable_irq(adapter->pdev->irq); 5144 e1000_intr(adapter->pdev->irq, netdev); 5145 enable_irq(adapter->pdev->irq); 5146 } 5147 #endif 5148 5149 /** 5150 * e1000_io_error_detected - called when PCI error is detected 5151 * @pdev: Pointer to PCI device 5152 * @state: The current pci connection state 5153 * 5154 * This function is called after a PCI bus error affecting 5155 * this device has been detected. 5156 */ 5157 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, 5158 pci_channel_state_t state) 5159 { 5160 struct net_device *netdev = pci_get_drvdata(pdev); 5161 struct e1000_adapter *adapter = netdev_priv(netdev); 5162 5163 netif_device_detach(netdev); 5164 5165 if (state == pci_channel_io_perm_failure) 5166 return PCI_ERS_RESULT_DISCONNECT; 5167 5168 if (netif_running(netdev)) 5169 e1000_down(adapter); 5170 pci_disable_device(pdev); 5171 5172 /* Request a slot slot reset. */ 5173 return PCI_ERS_RESULT_NEED_RESET; 5174 } 5175 5176 /** 5177 * e1000_io_slot_reset - called after the pci bus has been reset. 5178 * @pdev: Pointer to PCI device 5179 * 5180 * Restart the card from scratch, as if from a cold-boot. Implementation 5181 * resembles the first-half of the e1000_resume routine. 5182 */ 5183 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) 5184 { 5185 struct net_device *netdev = pci_get_drvdata(pdev); 5186 struct e1000_adapter *adapter = netdev_priv(netdev); 5187 struct e1000_hw *hw = &adapter->hw; 5188 int err; 5189 5190 if (adapter->need_ioport) 5191 err = pci_enable_device(pdev); 5192 else 5193 err = pci_enable_device_mem(pdev); 5194 if (err) { 5195 pr_err("Cannot re-enable PCI device after reset.\n"); 5196 return PCI_ERS_RESULT_DISCONNECT; 5197 } 5198 pci_set_master(pdev); 5199 5200 pci_enable_wake(pdev, PCI_D3hot, 0); 5201 pci_enable_wake(pdev, PCI_D3cold, 0); 5202 5203 e1000_reset(adapter); 5204 ew32(WUS, ~0); 5205 5206 return PCI_ERS_RESULT_RECOVERED; 5207 } 5208 5209 /** 5210 * e1000_io_resume - called when traffic can start flowing again. 5211 * @pdev: Pointer to PCI device 5212 * 5213 * This callback is called when the error recovery driver tells us that 5214 * its OK to resume normal operation. Implementation resembles the 5215 * second-half of the e1000_resume routine. 5216 */ 5217 static void e1000_io_resume(struct pci_dev *pdev) 5218 { 5219 struct net_device *netdev = pci_get_drvdata(pdev); 5220 struct e1000_adapter *adapter = netdev_priv(netdev); 5221 5222 e1000_init_manageability(adapter); 5223 5224 if (netif_running(netdev)) { 5225 if (e1000_up(adapter)) { 5226 pr_info("can't bring device back up after reset\n"); 5227 return; 5228 } 5229 } 5230 5231 netif_device_attach(netdev); 5232 } 5233 5234 /* e1000_main.c */ 5235