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 __devexit 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 = __devexit_p(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 __devinit e1000_probe(struct pci_dev *pdev, 942 const struct pci_device_id *ent) 943 { 944 struct net_device *netdev; 945 struct e1000_adapter *adapter; 946 struct e1000_hw *hw; 947 948 static int cards_found = 0; 949 static int global_quad_port_a = 0; /* global ksp3 port a indication */ 950 int i, err, pci_using_dac; 951 u16 eeprom_data = 0; 952 u16 tmp = 0; 953 u16 eeprom_apme_mask = E1000_EEPROM_APME; 954 int bars, need_ioport; 955 956 /* do not allocate ioport bars when not needed */ 957 need_ioport = e1000_is_need_ioport(pdev); 958 if (need_ioport) { 959 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO); 960 err = pci_enable_device(pdev); 961 } else { 962 bars = pci_select_bars(pdev, IORESOURCE_MEM); 963 err = pci_enable_device_mem(pdev); 964 } 965 if (err) 966 return err; 967 968 err = pci_request_selected_regions(pdev, bars, e1000_driver_name); 969 if (err) 970 goto err_pci_reg; 971 972 pci_set_master(pdev); 973 err = pci_save_state(pdev); 974 if (err) 975 goto err_alloc_etherdev; 976 977 err = -ENOMEM; 978 netdev = alloc_etherdev(sizeof(struct e1000_adapter)); 979 if (!netdev) 980 goto err_alloc_etherdev; 981 982 SET_NETDEV_DEV(netdev, &pdev->dev); 983 984 pci_set_drvdata(pdev, netdev); 985 adapter = netdev_priv(netdev); 986 adapter->netdev = netdev; 987 adapter->pdev = pdev; 988 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); 989 adapter->bars = bars; 990 adapter->need_ioport = need_ioport; 991 992 hw = &adapter->hw; 993 hw->back = adapter; 994 995 err = -EIO; 996 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0); 997 if (!hw->hw_addr) 998 goto err_ioremap; 999 1000 if (adapter->need_ioport) { 1001 for (i = BAR_1; i <= BAR_5; i++) { 1002 if (pci_resource_len(pdev, i) == 0) 1003 continue; 1004 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { 1005 hw->io_base = pci_resource_start(pdev, i); 1006 break; 1007 } 1008 } 1009 } 1010 1011 /* make ready for any if (hw->...) below */ 1012 err = e1000_init_hw_struct(adapter, hw); 1013 if (err) 1014 goto err_sw_init; 1015 1016 /* 1017 * there is a workaround being applied below that limits 1018 * 64-bit DMA addresses to 64-bit hardware. There are some 1019 * 32-bit adapters that Tx hang when given 64-bit DMA addresses 1020 */ 1021 pci_using_dac = 0; 1022 if ((hw->bus_type == e1000_bus_type_pcix) && 1023 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) { 1024 /* 1025 * according to DMA-API-HOWTO, coherent calls will always 1026 * succeed if the set call did 1027 */ 1028 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 1029 pci_using_dac = 1; 1030 } else { 1031 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 1032 if (err) { 1033 pr_err("No usable DMA config, aborting\n"); 1034 goto err_dma; 1035 } 1036 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 1037 } 1038 1039 netdev->netdev_ops = &e1000_netdev_ops; 1040 e1000_set_ethtool_ops(netdev); 1041 netdev->watchdog_timeo = 5 * HZ; 1042 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64); 1043 1044 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); 1045 1046 adapter->bd_number = cards_found; 1047 1048 /* setup the private structure */ 1049 1050 err = e1000_sw_init(adapter); 1051 if (err) 1052 goto err_sw_init; 1053 1054 err = -EIO; 1055 if (hw->mac_type == e1000_ce4100) { 1056 hw->ce4100_gbe_mdio_base_virt = 1057 ioremap(pci_resource_start(pdev, BAR_1), 1058 pci_resource_len(pdev, BAR_1)); 1059 1060 if (!hw->ce4100_gbe_mdio_base_virt) 1061 goto err_mdio_ioremap; 1062 } 1063 1064 if (hw->mac_type >= e1000_82543) { 1065 netdev->hw_features = NETIF_F_SG | 1066 NETIF_F_HW_CSUM | 1067 NETIF_F_HW_VLAN_RX; 1068 netdev->features = NETIF_F_HW_VLAN_TX | 1069 NETIF_F_HW_VLAN_FILTER; 1070 } 1071 1072 if ((hw->mac_type >= e1000_82544) && 1073 (hw->mac_type != e1000_82547)) 1074 netdev->hw_features |= NETIF_F_TSO; 1075 1076 netdev->priv_flags |= IFF_SUPP_NOFCS; 1077 1078 netdev->features |= netdev->hw_features; 1079 netdev->hw_features |= (NETIF_F_RXCSUM | 1080 NETIF_F_RXALL | 1081 NETIF_F_RXFCS); 1082 1083 if (pci_using_dac) { 1084 netdev->features |= NETIF_F_HIGHDMA; 1085 netdev->vlan_features |= NETIF_F_HIGHDMA; 1086 } 1087 1088 netdev->vlan_features |= (NETIF_F_TSO | 1089 NETIF_F_HW_CSUM | 1090 NETIF_F_SG); 1091 1092 netdev->priv_flags |= IFF_UNICAST_FLT; 1093 1094 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw); 1095 1096 /* initialize eeprom parameters */ 1097 if (e1000_init_eeprom_params(hw)) { 1098 e_err(probe, "EEPROM initialization failed\n"); 1099 goto err_eeprom; 1100 } 1101 1102 /* before reading the EEPROM, reset the controller to 1103 * put the device in a known good starting state */ 1104 1105 e1000_reset_hw(hw); 1106 1107 /* make sure the EEPROM is good */ 1108 if (e1000_validate_eeprom_checksum(hw) < 0) { 1109 e_err(probe, "The EEPROM Checksum Is Not Valid\n"); 1110 e1000_dump_eeprom(adapter); 1111 /* 1112 * set MAC address to all zeroes to invalidate and temporary 1113 * disable this device for the user. This blocks regular 1114 * traffic while still permitting ethtool ioctls from reaching 1115 * the hardware as well as allowing the user to run the 1116 * interface after manually setting a hw addr using 1117 * `ip set address` 1118 */ 1119 memset(hw->mac_addr, 0, netdev->addr_len); 1120 } else { 1121 /* copy the MAC address out of the EEPROM */ 1122 if (e1000_read_mac_addr(hw)) 1123 e_err(probe, "EEPROM Read Error\n"); 1124 } 1125 /* don't block initalization here due to bad MAC address */ 1126 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len); 1127 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len); 1128 1129 if (!is_valid_ether_addr(netdev->perm_addr)) 1130 e_err(probe, "Invalid MAC Address\n"); 1131 1132 1133 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog); 1134 INIT_DELAYED_WORK(&adapter->fifo_stall_task, 1135 e1000_82547_tx_fifo_stall_task); 1136 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task); 1137 INIT_WORK(&adapter->reset_task, e1000_reset_task); 1138 1139 e1000_check_options(adapter); 1140 1141 /* Initial Wake on LAN setting 1142 * If APM wake is enabled in the EEPROM, 1143 * enable the ACPI Magic Packet filter 1144 */ 1145 1146 switch (hw->mac_type) { 1147 case e1000_82542_rev2_0: 1148 case e1000_82542_rev2_1: 1149 case e1000_82543: 1150 break; 1151 case e1000_82544: 1152 e1000_read_eeprom(hw, 1153 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data); 1154 eeprom_apme_mask = E1000_EEPROM_82544_APM; 1155 break; 1156 case e1000_82546: 1157 case e1000_82546_rev_3: 1158 if (er32(STATUS) & E1000_STATUS_FUNC_1){ 1159 e1000_read_eeprom(hw, 1160 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); 1161 break; 1162 } 1163 /* Fall Through */ 1164 default: 1165 e1000_read_eeprom(hw, 1166 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data); 1167 break; 1168 } 1169 if (eeprom_data & eeprom_apme_mask) 1170 adapter->eeprom_wol |= E1000_WUFC_MAG; 1171 1172 /* now that we have the eeprom settings, apply the special cases 1173 * where the eeprom may be wrong or the board simply won't support 1174 * wake on lan on a particular port */ 1175 switch (pdev->device) { 1176 case E1000_DEV_ID_82546GB_PCIE: 1177 adapter->eeprom_wol = 0; 1178 break; 1179 case E1000_DEV_ID_82546EB_FIBER: 1180 case E1000_DEV_ID_82546GB_FIBER: 1181 /* Wake events only supported on port A for dual fiber 1182 * regardless of eeprom setting */ 1183 if (er32(STATUS) & E1000_STATUS_FUNC_1) 1184 adapter->eeprom_wol = 0; 1185 break; 1186 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3: 1187 /* if quad port adapter, disable WoL on all but port A */ 1188 if (global_quad_port_a != 0) 1189 adapter->eeprom_wol = 0; 1190 else 1191 adapter->quad_port_a = true; 1192 /* Reset for multiple quad port adapters */ 1193 if (++global_quad_port_a == 4) 1194 global_quad_port_a = 0; 1195 break; 1196 } 1197 1198 /* initialize the wol settings based on the eeprom settings */ 1199 adapter->wol = adapter->eeprom_wol; 1200 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol); 1201 1202 /* Auto detect PHY address */ 1203 if (hw->mac_type == e1000_ce4100) { 1204 for (i = 0; i < 32; i++) { 1205 hw->phy_addr = i; 1206 e1000_read_phy_reg(hw, PHY_ID2, &tmp); 1207 if (tmp == 0 || tmp == 0xFF) { 1208 if (i == 31) 1209 goto err_eeprom; 1210 continue; 1211 } else 1212 break; 1213 } 1214 } 1215 1216 /* reset the hardware with the new settings */ 1217 e1000_reset(adapter); 1218 1219 strcpy(netdev->name, "eth%d"); 1220 err = register_netdev(netdev); 1221 if (err) 1222 goto err_register; 1223 1224 e1000_vlan_filter_on_off(adapter, false); 1225 1226 /* print bus type/speed/width info */ 1227 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n", 1228 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""), 1229 ((hw->bus_speed == e1000_bus_speed_133) ? 133 : 1230 (hw->bus_speed == e1000_bus_speed_120) ? 120 : 1231 (hw->bus_speed == e1000_bus_speed_100) ? 100 : 1232 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33), 1233 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32), 1234 netdev->dev_addr); 1235 1236 /* carrier off reporting is important to ethtool even BEFORE open */ 1237 netif_carrier_off(netdev); 1238 1239 e_info(probe, "Intel(R) PRO/1000 Network Connection\n"); 1240 1241 cards_found++; 1242 return 0; 1243 1244 err_register: 1245 err_eeprom: 1246 e1000_phy_hw_reset(hw); 1247 1248 if (hw->flash_address) 1249 iounmap(hw->flash_address); 1250 kfree(adapter->tx_ring); 1251 kfree(adapter->rx_ring); 1252 err_dma: 1253 err_sw_init: 1254 err_mdio_ioremap: 1255 iounmap(hw->ce4100_gbe_mdio_base_virt); 1256 iounmap(hw->hw_addr); 1257 err_ioremap: 1258 free_netdev(netdev); 1259 err_alloc_etherdev: 1260 pci_release_selected_regions(pdev, bars); 1261 err_pci_reg: 1262 pci_disable_device(pdev); 1263 return err; 1264 } 1265 1266 /** 1267 * e1000_remove - Device Removal Routine 1268 * @pdev: PCI device information struct 1269 * 1270 * e1000_remove is called by the PCI subsystem to alert the driver 1271 * that it should release a PCI device. The could be caused by a 1272 * Hot-Plug event, or because the driver is going to be removed from 1273 * memory. 1274 **/ 1275 1276 static void __devexit e1000_remove(struct pci_dev *pdev) 1277 { 1278 struct net_device *netdev = pci_get_drvdata(pdev); 1279 struct e1000_adapter *adapter = netdev_priv(netdev); 1280 struct e1000_hw *hw = &adapter->hw; 1281 1282 e1000_down_and_stop(adapter); 1283 e1000_release_manageability(adapter); 1284 1285 unregister_netdev(netdev); 1286 1287 e1000_phy_hw_reset(hw); 1288 1289 kfree(adapter->tx_ring); 1290 kfree(adapter->rx_ring); 1291 1292 if (hw->mac_type == e1000_ce4100) 1293 iounmap(hw->ce4100_gbe_mdio_base_virt); 1294 iounmap(hw->hw_addr); 1295 if (hw->flash_address) 1296 iounmap(hw->flash_address); 1297 pci_release_selected_regions(pdev, adapter->bars); 1298 1299 free_netdev(netdev); 1300 1301 pci_disable_device(pdev); 1302 } 1303 1304 /** 1305 * e1000_sw_init - Initialize general software structures (struct e1000_adapter) 1306 * @adapter: board private structure to initialize 1307 * 1308 * e1000_sw_init initializes the Adapter private data structure. 1309 * e1000_init_hw_struct MUST be called before this function 1310 **/ 1311 1312 static int __devinit e1000_sw_init(struct e1000_adapter *adapter) 1313 { 1314 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; 1315 1316 adapter->num_tx_queues = 1; 1317 adapter->num_rx_queues = 1; 1318 1319 if (e1000_alloc_queues(adapter)) { 1320 e_err(probe, "Unable to allocate memory for queues\n"); 1321 return -ENOMEM; 1322 } 1323 1324 /* Explicitly disable IRQ since the NIC can be in any state. */ 1325 e1000_irq_disable(adapter); 1326 1327 spin_lock_init(&adapter->stats_lock); 1328 mutex_init(&adapter->mutex); 1329 1330 set_bit(__E1000_DOWN, &adapter->flags); 1331 1332 return 0; 1333 } 1334 1335 /** 1336 * e1000_alloc_queues - Allocate memory for all rings 1337 * @adapter: board private structure to initialize 1338 * 1339 * We allocate one ring per queue at run-time since we don't know the 1340 * number of queues at compile-time. 1341 **/ 1342 1343 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter) 1344 { 1345 adapter->tx_ring = kcalloc(adapter->num_tx_queues, 1346 sizeof(struct e1000_tx_ring), GFP_KERNEL); 1347 if (!adapter->tx_ring) 1348 return -ENOMEM; 1349 1350 adapter->rx_ring = kcalloc(adapter->num_rx_queues, 1351 sizeof(struct e1000_rx_ring), GFP_KERNEL); 1352 if (!adapter->rx_ring) { 1353 kfree(adapter->tx_ring); 1354 return -ENOMEM; 1355 } 1356 1357 return E1000_SUCCESS; 1358 } 1359 1360 /** 1361 * e1000_open - Called when a network interface is made active 1362 * @netdev: network interface device structure 1363 * 1364 * Returns 0 on success, negative value on failure 1365 * 1366 * The open entry point is called when a network interface is made 1367 * active by the system (IFF_UP). At this point all resources needed 1368 * for transmit and receive operations are allocated, the interrupt 1369 * handler is registered with the OS, the watchdog task is started, 1370 * and the stack is notified that the interface is ready. 1371 **/ 1372 1373 static int e1000_open(struct net_device *netdev) 1374 { 1375 struct e1000_adapter *adapter = netdev_priv(netdev); 1376 struct e1000_hw *hw = &adapter->hw; 1377 int err; 1378 1379 /* disallow open during test */ 1380 if (test_bit(__E1000_TESTING, &adapter->flags)) 1381 return -EBUSY; 1382 1383 netif_carrier_off(netdev); 1384 1385 /* allocate transmit descriptors */ 1386 err = e1000_setup_all_tx_resources(adapter); 1387 if (err) 1388 goto err_setup_tx; 1389 1390 /* allocate receive descriptors */ 1391 err = e1000_setup_all_rx_resources(adapter); 1392 if (err) 1393 goto err_setup_rx; 1394 1395 e1000_power_up_phy(adapter); 1396 1397 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; 1398 if ((hw->mng_cookie.status & 1399 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) { 1400 e1000_update_mng_vlan(adapter); 1401 } 1402 1403 /* before we allocate an interrupt, we must be ready to handle it. 1404 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt 1405 * as soon as we call pci_request_irq, so we have to setup our 1406 * clean_rx handler before we do so. */ 1407 e1000_configure(adapter); 1408 1409 err = e1000_request_irq(adapter); 1410 if (err) 1411 goto err_req_irq; 1412 1413 /* From here on the code is the same as e1000_up() */ 1414 clear_bit(__E1000_DOWN, &adapter->flags); 1415 1416 napi_enable(&adapter->napi); 1417 1418 e1000_irq_enable(adapter); 1419 1420 netif_start_queue(netdev); 1421 1422 /* fire a link status change interrupt to start the watchdog */ 1423 ew32(ICS, E1000_ICS_LSC); 1424 1425 return E1000_SUCCESS; 1426 1427 err_req_irq: 1428 e1000_power_down_phy(adapter); 1429 e1000_free_all_rx_resources(adapter); 1430 err_setup_rx: 1431 e1000_free_all_tx_resources(adapter); 1432 err_setup_tx: 1433 e1000_reset(adapter); 1434 1435 return err; 1436 } 1437 1438 /** 1439 * e1000_close - Disables a network interface 1440 * @netdev: network interface device structure 1441 * 1442 * Returns 0, this is not allowed to fail 1443 * 1444 * The close entry point is called when an interface is de-activated 1445 * by the OS. The hardware is still under the drivers control, but 1446 * needs to be disabled. A global MAC reset is issued to stop the 1447 * hardware, and all transmit and receive resources are freed. 1448 **/ 1449 1450 static int e1000_close(struct net_device *netdev) 1451 { 1452 struct e1000_adapter *adapter = netdev_priv(netdev); 1453 struct e1000_hw *hw = &adapter->hw; 1454 1455 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); 1456 e1000_down(adapter); 1457 e1000_power_down_phy(adapter); 1458 e1000_free_irq(adapter); 1459 1460 e1000_free_all_tx_resources(adapter); 1461 e1000_free_all_rx_resources(adapter); 1462 1463 /* kill manageability vlan ID if supported, but not if a vlan with 1464 * the same ID is registered on the host OS (let 8021q kill it) */ 1465 if ((hw->mng_cookie.status & 1466 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && 1467 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) { 1468 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id); 1469 } 1470 1471 return 0; 1472 } 1473 1474 /** 1475 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary 1476 * @adapter: address of board private structure 1477 * @start: address of beginning of memory 1478 * @len: length of memory 1479 **/ 1480 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start, 1481 unsigned long len) 1482 { 1483 struct e1000_hw *hw = &adapter->hw; 1484 unsigned long begin = (unsigned long)start; 1485 unsigned long end = begin + len; 1486 1487 /* First rev 82545 and 82546 need to not allow any memory 1488 * write location to cross 64k boundary due to errata 23 */ 1489 if (hw->mac_type == e1000_82545 || 1490 hw->mac_type == e1000_ce4100 || 1491 hw->mac_type == e1000_82546) { 1492 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true; 1493 } 1494 1495 return true; 1496 } 1497 1498 /** 1499 * e1000_setup_tx_resources - allocate Tx resources (Descriptors) 1500 * @adapter: board private structure 1501 * @txdr: tx descriptor ring (for a specific queue) to setup 1502 * 1503 * Return 0 on success, negative on failure 1504 **/ 1505 1506 static int e1000_setup_tx_resources(struct e1000_adapter *adapter, 1507 struct e1000_tx_ring *txdr) 1508 { 1509 struct pci_dev *pdev = adapter->pdev; 1510 int size; 1511 1512 size = sizeof(struct e1000_buffer) * txdr->count; 1513 txdr->buffer_info = vzalloc(size); 1514 if (!txdr->buffer_info) { 1515 e_err(probe, "Unable to allocate memory for the Tx descriptor " 1516 "ring\n"); 1517 return -ENOMEM; 1518 } 1519 1520 /* round up to nearest 4K */ 1521 1522 txdr->size = txdr->count * sizeof(struct e1000_tx_desc); 1523 txdr->size = ALIGN(txdr->size, 4096); 1524 1525 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, 1526 GFP_KERNEL); 1527 if (!txdr->desc) { 1528 setup_tx_desc_die: 1529 vfree(txdr->buffer_info); 1530 e_err(probe, "Unable to allocate memory for the Tx descriptor " 1531 "ring\n"); 1532 return -ENOMEM; 1533 } 1534 1535 /* Fix for errata 23, can't cross 64kB boundary */ 1536 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { 1537 void *olddesc = txdr->desc; 1538 dma_addr_t olddma = txdr->dma; 1539 e_err(tx_err, "txdr align check failed: %u bytes at %p\n", 1540 txdr->size, txdr->desc); 1541 /* Try again, without freeing the previous */ 1542 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, 1543 &txdr->dma, GFP_KERNEL); 1544 /* Failed allocation, critical failure */ 1545 if (!txdr->desc) { 1546 dma_free_coherent(&pdev->dev, txdr->size, olddesc, 1547 olddma); 1548 goto setup_tx_desc_die; 1549 } 1550 1551 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { 1552 /* give up */ 1553 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc, 1554 txdr->dma); 1555 dma_free_coherent(&pdev->dev, txdr->size, olddesc, 1556 olddma); 1557 e_err(probe, "Unable to allocate aligned memory " 1558 "for the transmit descriptor ring\n"); 1559 vfree(txdr->buffer_info); 1560 return -ENOMEM; 1561 } else { 1562 /* Free old allocation, new allocation was successful */ 1563 dma_free_coherent(&pdev->dev, txdr->size, olddesc, 1564 olddma); 1565 } 1566 } 1567 memset(txdr->desc, 0, txdr->size); 1568 1569 txdr->next_to_use = 0; 1570 txdr->next_to_clean = 0; 1571 1572 return 0; 1573 } 1574 1575 /** 1576 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources 1577 * (Descriptors) for all queues 1578 * @adapter: board private structure 1579 * 1580 * Return 0 on success, negative on failure 1581 **/ 1582 1583 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter) 1584 { 1585 int i, err = 0; 1586 1587 for (i = 0; i < adapter->num_tx_queues; i++) { 1588 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]); 1589 if (err) { 1590 e_err(probe, "Allocation for Tx Queue %u failed\n", i); 1591 for (i-- ; i >= 0; i--) 1592 e1000_free_tx_resources(adapter, 1593 &adapter->tx_ring[i]); 1594 break; 1595 } 1596 } 1597 1598 return err; 1599 } 1600 1601 /** 1602 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset 1603 * @adapter: board private structure 1604 * 1605 * Configure the Tx unit of the MAC after a reset. 1606 **/ 1607 1608 static void e1000_configure_tx(struct e1000_adapter *adapter) 1609 { 1610 u64 tdba; 1611 struct e1000_hw *hw = &adapter->hw; 1612 u32 tdlen, tctl, tipg; 1613 u32 ipgr1, ipgr2; 1614 1615 /* Setup the HW Tx Head and Tail descriptor pointers */ 1616 1617 switch (adapter->num_tx_queues) { 1618 case 1: 1619 default: 1620 tdba = adapter->tx_ring[0].dma; 1621 tdlen = adapter->tx_ring[0].count * 1622 sizeof(struct e1000_tx_desc); 1623 ew32(TDLEN, tdlen); 1624 ew32(TDBAH, (tdba >> 32)); 1625 ew32(TDBAL, (tdba & 0x00000000ffffffffULL)); 1626 ew32(TDT, 0); 1627 ew32(TDH, 0); 1628 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH); 1629 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT); 1630 break; 1631 } 1632 1633 /* Set the default values for the Tx Inter Packet Gap timer */ 1634 if ((hw->media_type == e1000_media_type_fiber || 1635 hw->media_type == e1000_media_type_internal_serdes)) 1636 tipg = DEFAULT_82543_TIPG_IPGT_FIBER; 1637 else 1638 tipg = DEFAULT_82543_TIPG_IPGT_COPPER; 1639 1640 switch (hw->mac_type) { 1641 case e1000_82542_rev2_0: 1642 case e1000_82542_rev2_1: 1643 tipg = DEFAULT_82542_TIPG_IPGT; 1644 ipgr1 = DEFAULT_82542_TIPG_IPGR1; 1645 ipgr2 = DEFAULT_82542_TIPG_IPGR2; 1646 break; 1647 default: 1648 ipgr1 = DEFAULT_82543_TIPG_IPGR1; 1649 ipgr2 = DEFAULT_82543_TIPG_IPGR2; 1650 break; 1651 } 1652 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT; 1653 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT; 1654 ew32(TIPG, tipg); 1655 1656 /* Set the Tx Interrupt Delay register */ 1657 1658 ew32(TIDV, adapter->tx_int_delay); 1659 if (hw->mac_type >= e1000_82540) 1660 ew32(TADV, adapter->tx_abs_int_delay); 1661 1662 /* Program the Transmit Control Register */ 1663 1664 tctl = er32(TCTL); 1665 tctl &= ~E1000_TCTL_CT; 1666 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | 1667 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); 1668 1669 e1000_config_collision_dist(hw); 1670 1671 /* Setup Transmit Descriptor Settings for eop descriptor */ 1672 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; 1673 1674 /* only set IDE if we are delaying interrupts using the timers */ 1675 if (adapter->tx_int_delay) 1676 adapter->txd_cmd |= E1000_TXD_CMD_IDE; 1677 1678 if (hw->mac_type < e1000_82543) 1679 adapter->txd_cmd |= E1000_TXD_CMD_RPS; 1680 else 1681 adapter->txd_cmd |= E1000_TXD_CMD_RS; 1682 1683 /* Cache if we're 82544 running in PCI-X because we'll 1684 * need this to apply a workaround later in the send path. */ 1685 if (hw->mac_type == e1000_82544 && 1686 hw->bus_type == e1000_bus_type_pcix) 1687 adapter->pcix_82544 = true; 1688 1689 ew32(TCTL, tctl); 1690 1691 } 1692 1693 /** 1694 * e1000_setup_rx_resources - allocate Rx resources (Descriptors) 1695 * @adapter: board private structure 1696 * @rxdr: rx descriptor ring (for a specific queue) to setup 1697 * 1698 * Returns 0 on success, negative on failure 1699 **/ 1700 1701 static int e1000_setup_rx_resources(struct e1000_adapter *adapter, 1702 struct e1000_rx_ring *rxdr) 1703 { 1704 struct pci_dev *pdev = adapter->pdev; 1705 int size, desc_len; 1706 1707 size = sizeof(struct e1000_buffer) * rxdr->count; 1708 rxdr->buffer_info = vzalloc(size); 1709 if (!rxdr->buffer_info) { 1710 e_err(probe, "Unable to allocate memory for the Rx descriptor " 1711 "ring\n"); 1712 return -ENOMEM; 1713 } 1714 1715 desc_len = sizeof(struct e1000_rx_desc); 1716 1717 /* Round up to nearest 4K */ 1718 1719 rxdr->size = rxdr->count * desc_len; 1720 rxdr->size = ALIGN(rxdr->size, 4096); 1721 1722 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, 1723 GFP_KERNEL); 1724 1725 if (!rxdr->desc) { 1726 e_err(probe, "Unable to allocate memory for the Rx descriptor " 1727 "ring\n"); 1728 setup_rx_desc_die: 1729 vfree(rxdr->buffer_info); 1730 return -ENOMEM; 1731 } 1732 1733 /* Fix for errata 23, can't cross 64kB boundary */ 1734 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { 1735 void *olddesc = rxdr->desc; 1736 dma_addr_t olddma = rxdr->dma; 1737 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n", 1738 rxdr->size, rxdr->desc); 1739 /* Try again, without freeing the previous */ 1740 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, 1741 &rxdr->dma, GFP_KERNEL); 1742 /* Failed allocation, critical failure */ 1743 if (!rxdr->desc) { 1744 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, 1745 olddma); 1746 e_err(probe, "Unable to allocate memory for the Rx " 1747 "descriptor ring\n"); 1748 goto setup_rx_desc_die; 1749 } 1750 1751 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { 1752 /* give up */ 1753 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc, 1754 rxdr->dma); 1755 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, 1756 olddma); 1757 e_err(probe, "Unable to allocate aligned memory for " 1758 "the Rx descriptor ring\n"); 1759 goto setup_rx_desc_die; 1760 } else { 1761 /* Free old allocation, new allocation was successful */ 1762 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, 1763 olddma); 1764 } 1765 } 1766 memset(rxdr->desc, 0, rxdr->size); 1767 1768 rxdr->next_to_clean = 0; 1769 rxdr->next_to_use = 0; 1770 rxdr->rx_skb_top = NULL; 1771 1772 return 0; 1773 } 1774 1775 /** 1776 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources 1777 * (Descriptors) for all queues 1778 * @adapter: board private structure 1779 * 1780 * Return 0 on success, negative on failure 1781 **/ 1782 1783 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter) 1784 { 1785 int i, err = 0; 1786 1787 for (i = 0; i < adapter->num_rx_queues; i++) { 1788 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]); 1789 if (err) { 1790 e_err(probe, "Allocation for Rx Queue %u failed\n", i); 1791 for (i-- ; i >= 0; i--) 1792 e1000_free_rx_resources(adapter, 1793 &adapter->rx_ring[i]); 1794 break; 1795 } 1796 } 1797 1798 return err; 1799 } 1800 1801 /** 1802 * e1000_setup_rctl - configure the receive control registers 1803 * @adapter: Board private structure 1804 **/ 1805 static void e1000_setup_rctl(struct e1000_adapter *adapter) 1806 { 1807 struct e1000_hw *hw = &adapter->hw; 1808 u32 rctl; 1809 1810 rctl = er32(RCTL); 1811 1812 rctl &= ~(3 << E1000_RCTL_MO_SHIFT); 1813 1814 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO | 1815 E1000_RCTL_RDMTS_HALF | 1816 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT); 1817 1818 if (hw->tbi_compatibility_on == 1) 1819 rctl |= E1000_RCTL_SBP; 1820 else 1821 rctl &= ~E1000_RCTL_SBP; 1822 1823 if (adapter->netdev->mtu <= ETH_DATA_LEN) 1824 rctl &= ~E1000_RCTL_LPE; 1825 else 1826 rctl |= E1000_RCTL_LPE; 1827 1828 /* Setup buffer sizes */ 1829 rctl &= ~E1000_RCTL_SZ_4096; 1830 rctl |= E1000_RCTL_BSEX; 1831 switch (adapter->rx_buffer_len) { 1832 case E1000_RXBUFFER_2048: 1833 default: 1834 rctl |= E1000_RCTL_SZ_2048; 1835 rctl &= ~E1000_RCTL_BSEX; 1836 break; 1837 case E1000_RXBUFFER_4096: 1838 rctl |= E1000_RCTL_SZ_4096; 1839 break; 1840 case E1000_RXBUFFER_8192: 1841 rctl |= E1000_RCTL_SZ_8192; 1842 break; 1843 case E1000_RXBUFFER_16384: 1844 rctl |= E1000_RCTL_SZ_16384; 1845 break; 1846 } 1847 1848 /* This is useful for sniffing bad packets. */ 1849 if (adapter->netdev->features & NETIF_F_RXALL) { 1850 /* UPE and MPE will be handled by normal PROMISC logic 1851 * in e1000e_set_rx_mode */ 1852 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */ 1853 E1000_RCTL_BAM | /* RX All Bcast Pkts */ 1854 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */ 1855 1856 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */ 1857 E1000_RCTL_DPF | /* Allow filtered pause */ 1858 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */ 1859 /* Do not mess with E1000_CTRL_VME, it affects transmit as well, 1860 * and that breaks VLANs. 1861 */ 1862 } 1863 1864 ew32(RCTL, rctl); 1865 } 1866 1867 /** 1868 * e1000_configure_rx - Configure 8254x Receive Unit after Reset 1869 * @adapter: board private structure 1870 * 1871 * Configure the Rx unit of the MAC after a reset. 1872 **/ 1873 1874 static void e1000_configure_rx(struct e1000_adapter *adapter) 1875 { 1876 u64 rdba; 1877 struct e1000_hw *hw = &adapter->hw; 1878 u32 rdlen, rctl, rxcsum; 1879 1880 if (adapter->netdev->mtu > ETH_DATA_LEN) { 1881 rdlen = adapter->rx_ring[0].count * 1882 sizeof(struct e1000_rx_desc); 1883 adapter->clean_rx = e1000_clean_jumbo_rx_irq; 1884 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers; 1885 } else { 1886 rdlen = adapter->rx_ring[0].count * 1887 sizeof(struct e1000_rx_desc); 1888 adapter->clean_rx = e1000_clean_rx_irq; 1889 adapter->alloc_rx_buf = e1000_alloc_rx_buffers; 1890 } 1891 1892 /* disable receives while setting up the descriptors */ 1893 rctl = er32(RCTL); 1894 ew32(RCTL, rctl & ~E1000_RCTL_EN); 1895 1896 /* set the Receive Delay Timer Register */ 1897 ew32(RDTR, adapter->rx_int_delay); 1898 1899 if (hw->mac_type >= e1000_82540) { 1900 ew32(RADV, adapter->rx_abs_int_delay); 1901 if (adapter->itr_setting != 0) 1902 ew32(ITR, 1000000000 / (adapter->itr * 256)); 1903 } 1904 1905 /* Setup the HW Rx Head and Tail Descriptor Pointers and 1906 * the Base and Length of the Rx Descriptor Ring */ 1907 switch (adapter->num_rx_queues) { 1908 case 1: 1909 default: 1910 rdba = adapter->rx_ring[0].dma; 1911 ew32(RDLEN, rdlen); 1912 ew32(RDBAH, (rdba >> 32)); 1913 ew32(RDBAL, (rdba & 0x00000000ffffffffULL)); 1914 ew32(RDT, 0); 1915 ew32(RDH, 0); 1916 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH); 1917 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT); 1918 break; 1919 } 1920 1921 /* Enable 82543 Receive Checksum Offload for TCP and UDP */ 1922 if (hw->mac_type >= e1000_82543) { 1923 rxcsum = er32(RXCSUM); 1924 if (adapter->rx_csum) 1925 rxcsum |= E1000_RXCSUM_TUOFL; 1926 else 1927 /* don't need to clear IPPCSE as it defaults to 0 */ 1928 rxcsum &= ~E1000_RXCSUM_TUOFL; 1929 ew32(RXCSUM, rxcsum); 1930 } 1931 1932 /* Enable Receives */ 1933 ew32(RCTL, rctl | E1000_RCTL_EN); 1934 } 1935 1936 /** 1937 * e1000_free_tx_resources - Free Tx Resources per Queue 1938 * @adapter: board private structure 1939 * @tx_ring: Tx descriptor ring for a specific queue 1940 * 1941 * Free all transmit software resources 1942 **/ 1943 1944 static void e1000_free_tx_resources(struct e1000_adapter *adapter, 1945 struct e1000_tx_ring *tx_ring) 1946 { 1947 struct pci_dev *pdev = adapter->pdev; 1948 1949 e1000_clean_tx_ring(adapter, tx_ring); 1950 1951 vfree(tx_ring->buffer_info); 1952 tx_ring->buffer_info = NULL; 1953 1954 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, 1955 tx_ring->dma); 1956 1957 tx_ring->desc = NULL; 1958 } 1959 1960 /** 1961 * e1000_free_all_tx_resources - Free Tx Resources for All Queues 1962 * @adapter: board private structure 1963 * 1964 * Free all transmit software resources 1965 **/ 1966 1967 void e1000_free_all_tx_resources(struct e1000_adapter *adapter) 1968 { 1969 int i; 1970 1971 for (i = 0; i < adapter->num_tx_queues; i++) 1972 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]); 1973 } 1974 1975 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter, 1976 struct e1000_buffer *buffer_info) 1977 { 1978 if (buffer_info->dma) { 1979 if (buffer_info->mapped_as_page) 1980 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, 1981 buffer_info->length, DMA_TO_DEVICE); 1982 else 1983 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, 1984 buffer_info->length, 1985 DMA_TO_DEVICE); 1986 buffer_info->dma = 0; 1987 } 1988 if (buffer_info->skb) { 1989 dev_kfree_skb_any(buffer_info->skb); 1990 buffer_info->skb = NULL; 1991 } 1992 buffer_info->time_stamp = 0; 1993 /* buffer_info must be completely set up in the transmit path */ 1994 } 1995 1996 /** 1997 * e1000_clean_tx_ring - Free Tx Buffers 1998 * @adapter: board private structure 1999 * @tx_ring: ring to be cleaned 2000 **/ 2001 2002 static void e1000_clean_tx_ring(struct e1000_adapter *adapter, 2003 struct e1000_tx_ring *tx_ring) 2004 { 2005 struct e1000_hw *hw = &adapter->hw; 2006 struct e1000_buffer *buffer_info; 2007 unsigned long size; 2008 unsigned int i; 2009 2010 /* Free all the Tx ring sk_buffs */ 2011 2012 for (i = 0; i < tx_ring->count; i++) { 2013 buffer_info = &tx_ring->buffer_info[i]; 2014 e1000_unmap_and_free_tx_resource(adapter, buffer_info); 2015 } 2016 2017 netdev_reset_queue(adapter->netdev); 2018 size = sizeof(struct e1000_buffer) * tx_ring->count; 2019 memset(tx_ring->buffer_info, 0, size); 2020 2021 /* Zero out the descriptor ring */ 2022 2023 memset(tx_ring->desc, 0, tx_ring->size); 2024 2025 tx_ring->next_to_use = 0; 2026 tx_ring->next_to_clean = 0; 2027 tx_ring->last_tx_tso = false; 2028 2029 writel(0, hw->hw_addr + tx_ring->tdh); 2030 writel(0, hw->hw_addr + tx_ring->tdt); 2031 } 2032 2033 /** 2034 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues 2035 * @adapter: board private structure 2036 **/ 2037 2038 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter) 2039 { 2040 int i; 2041 2042 for (i = 0; i < adapter->num_tx_queues; i++) 2043 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]); 2044 } 2045 2046 /** 2047 * e1000_free_rx_resources - Free Rx Resources 2048 * @adapter: board private structure 2049 * @rx_ring: ring to clean the resources from 2050 * 2051 * Free all receive software resources 2052 **/ 2053 2054 static void e1000_free_rx_resources(struct e1000_adapter *adapter, 2055 struct e1000_rx_ring *rx_ring) 2056 { 2057 struct pci_dev *pdev = adapter->pdev; 2058 2059 e1000_clean_rx_ring(adapter, rx_ring); 2060 2061 vfree(rx_ring->buffer_info); 2062 rx_ring->buffer_info = NULL; 2063 2064 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, 2065 rx_ring->dma); 2066 2067 rx_ring->desc = NULL; 2068 } 2069 2070 /** 2071 * e1000_free_all_rx_resources - Free Rx Resources for All Queues 2072 * @adapter: board private structure 2073 * 2074 * Free all receive software resources 2075 **/ 2076 2077 void e1000_free_all_rx_resources(struct e1000_adapter *adapter) 2078 { 2079 int i; 2080 2081 for (i = 0; i < adapter->num_rx_queues; i++) 2082 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]); 2083 } 2084 2085 /** 2086 * e1000_clean_rx_ring - Free Rx Buffers per Queue 2087 * @adapter: board private structure 2088 * @rx_ring: ring to free buffers from 2089 **/ 2090 2091 static void e1000_clean_rx_ring(struct e1000_adapter *adapter, 2092 struct e1000_rx_ring *rx_ring) 2093 { 2094 struct e1000_hw *hw = &adapter->hw; 2095 struct e1000_buffer *buffer_info; 2096 struct pci_dev *pdev = adapter->pdev; 2097 unsigned long size; 2098 unsigned int i; 2099 2100 /* Free all the Rx ring sk_buffs */ 2101 for (i = 0; i < rx_ring->count; i++) { 2102 buffer_info = &rx_ring->buffer_info[i]; 2103 if (buffer_info->dma && 2104 adapter->clean_rx == e1000_clean_rx_irq) { 2105 dma_unmap_single(&pdev->dev, buffer_info->dma, 2106 buffer_info->length, 2107 DMA_FROM_DEVICE); 2108 } else if (buffer_info->dma && 2109 adapter->clean_rx == e1000_clean_jumbo_rx_irq) { 2110 dma_unmap_page(&pdev->dev, buffer_info->dma, 2111 buffer_info->length, 2112 DMA_FROM_DEVICE); 2113 } 2114 2115 buffer_info->dma = 0; 2116 if (buffer_info->page) { 2117 put_page(buffer_info->page); 2118 buffer_info->page = NULL; 2119 } 2120 if (buffer_info->skb) { 2121 dev_kfree_skb(buffer_info->skb); 2122 buffer_info->skb = NULL; 2123 } 2124 } 2125 2126 /* there also may be some cached data from a chained receive */ 2127 if (rx_ring->rx_skb_top) { 2128 dev_kfree_skb(rx_ring->rx_skb_top); 2129 rx_ring->rx_skb_top = NULL; 2130 } 2131 2132 size = sizeof(struct e1000_buffer) * rx_ring->count; 2133 memset(rx_ring->buffer_info, 0, size); 2134 2135 /* Zero out the descriptor ring */ 2136 memset(rx_ring->desc, 0, rx_ring->size); 2137 2138 rx_ring->next_to_clean = 0; 2139 rx_ring->next_to_use = 0; 2140 2141 writel(0, hw->hw_addr + rx_ring->rdh); 2142 writel(0, hw->hw_addr + rx_ring->rdt); 2143 } 2144 2145 /** 2146 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues 2147 * @adapter: board private structure 2148 **/ 2149 2150 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter) 2151 { 2152 int i; 2153 2154 for (i = 0; i < adapter->num_rx_queues; i++) 2155 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]); 2156 } 2157 2158 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset 2159 * and memory write and invalidate disabled for certain operations 2160 */ 2161 static void e1000_enter_82542_rst(struct e1000_adapter *adapter) 2162 { 2163 struct e1000_hw *hw = &adapter->hw; 2164 struct net_device *netdev = adapter->netdev; 2165 u32 rctl; 2166 2167 e1000_pci_clear_mwi(hw); 2168 2169 rctl = er32(RCTL); 2170 rctl |= E1000_RCTL_RST; 2171 ew32(RCTL, rctl); 2172 E1000_WRITE_FLUSH(); 2173 mdelay(5); 2174 2175 if (netif_running(netdev)) 2176 e1000_clean_all_rx_rings(adapter); 2177 } 2178 2179 static void e1000_leave_82542_rst(struct e1000_adapter *adapter) 2180 { 2181 struct e1000_hw *hw = &adapter->hw; 2182 struct net_device *netdev = adapter->netdev; 2183 u32 rctl; 2184 2185 rctl = er32(RCTL); 2186 rctl &= ~E1000_RCTL_RST; 2187 ew32(RCTL, rctl); 2188 E1000_WRITE_FLUSH(); 2189 mdelay(5); 2190 2191 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE) 2192 e1000_pci_set_mwi(hw); 2193 2194 if (netif_running(netdev)) { 2195 /* No need to loop, because 82542 supports only 1 queue */ 2196 struct e1000_rx_ring *ring = &adapter->rx_ring[0]; 2197 e1000_configure_rx(adapter); 2198 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring)); 2199 } 2200 } 2201 2202 /** 2203 * e1000_set_mac - Change the Ethernet Address of the NIC 2204 * @netdev: network interface device structure 2205 * @p: pointer to an address structure 2206 * 2207 * Returns 0 on success, negative on failure 2208 **/ 2209 2210 static int e1000_set_mac(struct net_device *netdev, void *p) 2211 { 2212 struct e1000_adapter *adapter = netdev_priv(netdev); 2213 struct e1000_hw *hw = &adapter->hw; 2214 struct sockaddr *addr = p; 2215 2216 if (!is_valid_ether_addr(addr->sa_data)) 2217 return -EADDRNOTAVAIL; 2218 2219 /* 82542 2.0 needs to be in reset to write receive address registers */ 2220 2221 if (hw->mac_type == e1000_82542_rev2_0) 2222 e1000_enter_82542_rst(adapter); 2223 2224 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 2225 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len); 2226 2227 e1000_rar_set(hw, hw->mac_addr, 0); 2228 2229 if (hw->mac_type == e1000_82542_rev2_0) 2230 e1000_leave_82542_rst(adapter); 2231 2232 return 0; 2233 } 2234 2235 /** 2236 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set 2237 * @netdev: network interface device structure 2238 * 2239 * The set_rx_mode entry point is called whenever the unicast or multicast 2240 * address lists or the network interface flags are updated. This routine is 2241 * responsible for configuring the hardware for proper unicast, multicast, 2242 * promiscuous mode, and all-multi behavior. 2243 **/ 2244 2245 static void e1000_set_rx_mode(struct net_device *netdev) 2246 { 2247 struct e1000_adapter *adapter = netdev_priv(netdev); 2248 struct e1000_hw *hw = &adapter->hw; 2249 struct netdev_hw_addr *ha; 2250 bool use_uc = false; 2251 u32 rctl; 2252 u32 hash_value; 2253 int i, rar_entries = E1000_RAR_ENTRIES; 2254 int mta_reg_count = E1000_NUM_MTA_REGISTERS; 2255 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC); 2256 2257 if (!mcarray) { 2258 e_err(probe, "memory allocation failed\n"); 2259 return; 2260 } 2261 2262 /* Check for Promiscuous and All Multicast modes */ 2263 2264 rctl = er32(RCTL); 2265 2266 if (netdev->flags & IFF_PROMISC) { 2267 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); 2268 rctl &= ~E1000_RCTL_VFE; 2269 } else { 2270 if (netdev->flags & IFF_ALLMULTI) 2271 rctl |= E1000_RCTL_MPE; 2272 else 2273 rctl &= ~E1000_RCTL_MPE; 2274 /* Enable VLAN filter if there is a VLAN */ 2275 if (e1000_vlan_used(adapter)) 2276 rctl |= E1000_RCTL_VFE; 2277 } 2278 2279 if (netdev_uc_count(netdev) > rar_entries - 1) { 2280 rctl |= E1000_RCTL_UPE; 2281 } else if (!(netdev->flags & IFF_PROMISC)) { 2282 rctl &= ~E1000_RCTL_UPE; 2283 use_uc = true; 2284 } 2285 2286 ew32(RCTL, rctl); 2287 2288 /* 82542 2.0 needs to be in reset to write receive address registers */ 2289 2290 if (hw->mac_type == e1000_82542_rev2_0) 2291 e1000_enter_82542_rst(adapter); 2292 2293 /* load the first 14 addresses into the exact filters 1-14. Unicast 2294 * addresses take precedence to avoid disabling unicast filtering 2295 * when possible. 2296 * 2297 * RAR 0 is used for the station MAC address 2298 * if there are not 14 addresses, go ahead and clear the filters 2299 */ 2300 i = 1; 2301 if (use_uc) 2302 netdev_for_each_uc_addr(ha, netdev) { 2303 if (i == rar_entries) 2304 break; 2305 e1000_rar_set(hw, ha->addr, i++); 2306 } 2307 2308 netdev_for_each_mc_addr(ha, netdev) { 2309 if (i == rar_entries) { 2310 /* load any remaining addresses into the hash table */ 2311 u32 hash_reg, hash_bit, mta; 2312 hash_value = e1000_hash_mc_addr(hw, ha->addr); 2313 hash_reg = (hash_value >> 5) & 0x7F; 2314 hash_bit = hash_value & 0x1F; 2315 mta = (1 << hash_bit); 2316 mcarray[hash_reg] |= mta; 2317 } else { 2318 e1000_rar_set(hw, ha->addr, i++); 2319 } 2320 } 2321 2322 for (; i < rar_entries; i++) { 2323 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0); 2324 E1000_WRITE_FLUSH(); 2325 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0); 2326 E1000_WRITE_FLUSH(); 2327 } 2328 2329 /* write the hash table completely, write from bottom to avoid 2330 * both stupid write combining chipsets, and flushing each write */ 2331 for (i = mta_reg_count - 1; i >= 0 ; i--) { 2332 /* 2333 * If we are on an 82544 has an errata where writing odd 2334 * offsets overwrites the previous even offset, but writing 2335 * backwards over the range solves the issue by always 2336 * writing the odd offset first 2337 */ 2338 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]); 2339 } 2340 E1000_WRITE_FLUSH(); 2341 2342 if (hw->mac_type == e1000_82542_rev2_0) 2343 e1000_leave_82542_rst(adapter); 2344 2345 kfree(mcarray); 2346 } 2347 2348 /** 2349 * e1000_update_phy_info_task - get phy info 2350 * @work: work struct contained inside adapter struct 2351 * 2352 * Need to wait a few seconds after link up to get diagnostic information from 2353 * the phy 2354 */ 2355 static void e1000_update_phy_info_task(struct work_struct *work) 2356 { 2357 struct e1000_adapter *adapter = container_of(work, 2358 struct e1000_adapter, 2359 phy_info_task.work); 2360 if (test_bit(__E1000_DOWN, &adapter->flags)) 2361 return; 2362 mutex_lock(&adapter->mutex); 2363 e1000_phy_get_info(&adapter->hw, &adapter->phy_info); 2364 mutex_unlock(&adapter->mutex); 2365 } 2366 2367 /** 2368 * e1000_82547_tx_fifo_stall_task - task to complete work 2369 * @work: work struct contained inside adapter struct 2370 **/ 2371 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work) 2372 { 2373 struct e1000_adapter *adapter = container_of(work, 2374 struct e1000_adapter, 2375 fifo_stall_task.work); 2376 struct e1000_hw *hw = &adapter->hw; 2377 struct net_device *netdev = adapter->netdev; 2378 u32 tctl; 2379 2380 if (test_bit(__E1000_DOWN, &adapter->flags)) 2381 return; 2382 mutex_lock(&adapter->mutex); 2383 if (atomic_read(&adapter->tx_fifo_stall)) { 2384 if ((er32(TDT) == er32(TDH)) && 2385 (er32(TDFT) == er32(TDFH)) && 2386 (er32(TDFTS) == er32(TDFHS))) { 2387 tctl = er32(TCTL); 2388 ew32(TCTL, tctl & ~E1000_TCTL_EN); 2389 ew32(TDFT, adapter->tx_head_addr); 2390 ew32(TDFH, adapter->tx_head_addr); 2391 ew32(TDFTS, adapter->tx_head_addr); 2392 ew32(TDFHS, adapter->tx_head_addr); 2393 ew32(TCTL, tctl); 2394 E1000_WRITE_FLUSH(); 2395 2396 adapter->tx_fifo_head = 0; 2397 atomic_set(&adapter->tx_fifo_stall, 0); 2398 netif_wake_queue(netdev); 2399 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) { 2400 schedule_delayed_work(&adapter->fifo_stall_task, 1); 2401 } 2402 } 2403 mutex_unlock(&adapter->mutex); 2404 } 2405 2406 bool e1000_has_link(struct e1000_adapter *adapter) 2407 { 2408 struct e1000_hw *hw = &adapter->hw; 2409 bool link_active = false; 2410 2411 /* get_link_status is set on LSC (link status) interrupt or rx 2412 * sequence error interrupt (except on intel ce4100). 2413 * get_link_status will stay false until the 2414 * e1000_check_for_link establishes link for copper adapters 2415 * ONLY 2416 */ 2417 switch (hw->media_type) { 2418 case e1000_media_type_copper: 2419 if (hw->mac_type == e1000_ce4100) 2420 hw->get_link_status = 1; 2421 if (hw->get_link_status) { 2422 e1000_check_for_link(hw); 2423 link_active = !hw->get_link_status; 2424 } else { 2425 link_active = true; 2426 } 2427 break; 2428 case e1000_media_type_fiber: 2429 e1000_check_for_link(hw); 2430 link_active = !!(er32(STATUS) & E1000_STATUS_LU); 2431 break; 2432 case e1000_media_type_internal_serdes: 2433 e1000_check_for_link(hw); 2434 link_active = hw->serdes_has_link; 2435 break; 2436 default: 2437 break; 2438 } 2439 2440 return link_active; 2441 } 2442 2443 /** 2444 * e1000_watchdog - work function 2445 * @work: work struct contained inside adapter struct 2446 **/ 2447 static void e1000_watchdog(struct work_struct *work) 2448 { 2449 struct e1000_adapter *adapter = container_of(work, 2450 struct e1000_adapter, 2451 watchdog_task.work); 2452 struct e1000_hw *hw = &adapter->hw; 2453 struct net_device *netdev = adapter->netdev; 2454 struct e1000_tx_ring *txdr = adapter->tx_ring; 2455 u32 link, tctl; 2456 2457 if (test_bit(__E1000_DOWN, &adapter->flags)) 2458 return; 2459 2460 mutex_lock(&adapter->mutex); 2461 link = e1000_has_link(adapter); 2462 if ((netif_carrier_ok(netdev)) && link) 2463 goto link_up; 2464 2465 if (link) { 2466 if (!netif_carrier_ok(netdev)) { 2467 u32 ctrl; 2468 bool txb2b = true; 2469 /* update snapshot of PHY registers on LSC */ 2470 e1000_get_speed_and_duplex(hw, 2471 &adapter->link_speed, 2472 &adapter->link_duplex); 2473 2474 ctrl = er32(CTRL); 2475 pr_info("%s NIC Link is Up %d Mbps %s, " 2476 "Flow Control: %s\n", 2477 netdev->name, 2478 adapter->link_speed, 2479 adapter->link_duplex == FULL_DUPLEX ? 2480 "Full Duplex" : "Half Duplex", 2481 ((ctrl & E1000_CTRL_TFCE) && (ctrl & 2482 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl & 2483 E1000_CTRL_RFCE) ? "RX" : ((ctrl & 2484 E1000_CTRL_TFCE) ? "TX" : "None"))); 2485 2486 /* adjust timeout factor according to speed/duplex */ 2487 adapter->tx_timeout_factor = 1; 2488 switch (adapter->link_speed) { 2489 case SPEED_10: 2490 txb2b = false; 2491 adapter->tx_timeout_factor = 16; 2492 break; 2493 case SPEED_100: 2494 txb2b = false; 2495 /* maybe add some timeout factor ? */ 2496 break; 2497 } 2498 2499 /* enable transmits in the hardware */ 2500 tctl = er32(TCTL); 2501 tctl |= E1000_TCTL_EN; 2502 ew32(TCTL, tctl); 2503 2504 netif_carrier_on(netdev); 2505 if (!test_bit(__E1000_DOWN, &adapter->flags)) 2506 schedule_delayed_work(&adapter->phy_info_task, 2507 2 * HZ); 2508 adapter->smartspeed = 0; 2509 } 2510 } else { 2511 if (netif_carrier_ok(netdev)) { 2512 adapter->link_speed = 0; 2513 adapter->link_duplex = 0; 2514 pr_info("%s NIC Link is Down\n", 2515 netdev->name); 2516 netif_carrier_off(netdev); 2517 2518 if (!test_bit(__E1000_DOWN, &adapter->flags)) 2519 schedule_delayed_work(&adapter->phy_info_task, 2520 2 * HZ); 2521 } 2522 2523 e1000_smartspeed(adapter); 2524 } 2525 2526 link_up: 2527 e1000_update_stats(adapter); 2528 2529 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; 2530 adapter->tpt_old = adapter->stats.tpt; 2531 hw->collision_delta = adapter->stats.colc - adapter->colc_old; 2532 adapter->colc_old = adapter->stats.colc; 2533 2534 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old; 2535 adapter->gorcl_old = adapter->stats.gorcl; 2536 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old; 2537 adapter->gotcl_old = adapter->stats.gotcl; 2538 2539 e1000_update_adaptive(hw); 2540 2541 if (!netif_carrier_ok(netdev)) { 2542 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) { 2543 /* We've lost link, so the controller stops DMA, 2544 * but we've got queued Tx work that's never going 2545 * to get done, so reset controller to flush Tx. 2546 * (Do the reset outside of interrupt context). */ 2547 adapter->tx_timeout_count++; 2548 schedule_work(&adapter->reset_task); 2549 /* exit immediately since reset is imminent */ 2550 goto unlock; 2551 } 2552 } 2553 2554 /* Simple mode for Interrupt Throttle Rate (ITR) */ 2555 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) { 2556 /* 2557 * Symmetric Tx/Rx gets a reduced ITR=2000; 2558 * Total asymmetrical Tx or Rx gets ITR=8000; 2559 * everyone else is between 2000-8000. 2560 */ 2561 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000; 2562 u32 dif = (adapter->gotcl > adapter->gorcl ? 2563 adapter->gotcl - adapter->gorcl : 2564 adapter->gorcl - adapter->gotcl) / 10000; 2565 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000; 2566 2567 ew32(ITR, 1000000000 / (itr * 256)); 2568 } 2569 2570 /* Cause software interrupt to ensure rx ring is cleaned */ 2571 ew32(ICS, E1000_ICS_RXDMT0); 2572 2573 /* Force detection of hung controller every watchdog period */ 2574 adapter->detect_tx_hung = true; 2575 2576 /* Reschedule the task */ 2577 if (!test_bit(__E1000_DOWN, &adapter->flags)) 2578 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ); 2579 2580 unlock: 2581 mutex_unlock(&adapter->mutex); 2582 } 2583 2584 enum latency_range { 2585 lowest_latency = 0, 2586 low_latency = 1, 2587 bulk_latency = 2, 2588 latency_invalid = 255 2589 }; 2590 2591 /** 2592 * e1000_update_itr - update the dynamic ITR value based on statistics 2593 * @adapter: pointer to adapter 2594 * @itr_setting: current adapter->itr 2595 * @packets: the number of packets during this measurement interval 2596 * @bytes: the number of bytes during this measurement interval 2597 * 2598 * Stores a new ITR value based on packets and byte 2599 * counts during the last interrupt. The advantage of per interrupt 2600 * computation is faster updates and more accurate ITR for the current 2601 * traffic pattern. Constants in this function were computed 2602 * based on theoretical maximum wire speed and thresholds were set based 2603 * on testing data as well as attempting to minimize response time 2604 * while increasing bulk throughput. 2605 * this functionality is controlled by the InterruptThrottleRate module 2606 * parameter (see e1000_param.c) 2607 **/ 2608 static unsigned int e1000_update_itr(struct e1000_adapter *adapter, 2609 u16 itr_setting, int packets, int bytes) 2610 { 2611 unsigned int retval = itr_setting; 2612 struct e1000_hw *hw = &adapter->hw; 2613 2614 if (unlikely(hw->mac_type < e1000_82540)) 2615 goto update_itr_done; 2616 2617 if (packets == 0) 2618 goto update_itr_done; 2619 2620 switch (itr_setting) { 2621 case lowest_latency: 2622 /* jumbo frames get bulk treatment*/ 2623 if (bytes/packets > 8000) 2624 retval = bulk_latency; 2625 else if ((packets < 5) && (bytes > 512)) 2626 retval = low_latency; 2627 break; 2628 case low_latency: /* 50 usec aka 20000 ints/s */ 2629 if (bytes > 10000) { 2630 /* jumbo frames need bulk latency setting */ 2631 if (bytes/packets > 8000) 2632 retval = bulk_latency; 2633 else if ((packets < 10) || ((bytes/packets) > 1200)) 2634 retval = bulk_latency; 2635 else if ((packets > 35)) 2636 retval = lowest_latency; 2637 } else if (bytes/packets > 2000) 2638 retval = bulk_latency; 2639 else if (packets <= 2 && bytes < 512) 2640 retval = lowest_latency; 2641 break; 2642 case bulk_latency: /* 250 usec aka 4000 ints/s */ 2643 if (bytes > 25000) { 2644 if (packets > 35) 2645 retval = low_latency; 2646 } else if (bytes < 6000) { 2647 retval = low_latency; 2648 } 2649 break; 2650 } 2651 2652 update_itr_done: 2653 return retval; 2654 } 2655 2656 static void e1000_set_itr(struct e1000_adapter *adapter) 2657 { 2658 struct e1000_hw *hw = &adapter->hw; 2659 u16 current_itr; 2660 u32 new_itr = adapter->itr; 2661 2662 if (unlikely(hw->mac_type < e1000_82540)) 2663 return; 2664 2665 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ 2666 if (unlikely(adapter->link_speed != SPEED_1000)) { 2667 current_itr = 0; 2668 new_itr = 4000; 2669 goto set_itr_now; 2670 } 2671 2672 adapter->tx_itr = e1000_update_itr(adapter, 2673 adapter->tx_itr, 2674 adapter->total_tx_packets, 2675 adapter->total_tx_bytes); 2676 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2677 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) 2678 adapter->tx_itr = low_latency; 2679 2680 adapter->rx_itr = e1000_update_itr(adapter, 2681 adapter->rx_itr, 2682 adapter->total_rx_packets, 2683 adapter->total_rx_bytes); 2684 /* conservative mode (itr 3) eliminates the lowest_latency setting */ 2685 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) 2686 adapter->rx_itr = low_latency; 2687 2688 current_itr = max(adapter->rx_itr, adapter->tx_itr); 2689 2690 switch (current_itr) { 2691 /* counts and packets in update_itr are dependent on these numbers */ 2692 case lowest_latency: 2693 new_itr = 70000; 2694 break; 2695 case low_latency: 2696 new_itr = 20000; /* aka hwitr = ~200 */ 2697 break; 2698 case bulk_latency: 2699 new_itr = 4000; 2700 break; 2701 default: 2702 break; 2703 } 2704 2705 set_itr_now: 2706 if (new_itr != adapter->itr) { 2707 /* this attempts to bias the interrupt rate towards Bulk 2708 * by adding intermediate steps when interrupt rate is 2709 * increasing */ 2710 new_itr = new_itr > adapter->itr ? 2711 min(adapter->itr + (new_itr >> 2), new_itr) : 2712 new_itr; 2713 adapter->itr = new_itr; 2714 ew32(ITR, 1000000000 / (new_itr * 256)); 2715 } 2716 } 2717 2718 #define E1000_TX_FLAGS_CSUM 0x00000001 2719 #define E1000_TX_FLAGS_VLAN 0x00000002 2720 #define E1000_TX_FLAGS_TSO 0x00000004 2721 #define E1000_TX_FLAGS_IPV4 0x00000008 2722 #define E1000_TX_FLAGS_NO_FCS 0x00000010 2723 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 2724 #define E1000_TX_FLAGS_VLAN_SHIFT 16 2725 2726 static int e1000_tso(struct e1000_adapter *adapter, 2727 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) 2728 { 2729 struct e1000_context_desc *context_desc; 2730 struct e1000_buffer *buffer_info; 2731 unsigned int i; 2732 u32 cmd_length = 0; 2733 u16 ipcse = 0, tucse, mss; 2734 u8 ipcss, ipcso, tucss, tucso, hdr_len; 2735 int err; 2736 2737 if (skb_is_gso(skb)) { 2738 if (skb_header_cloned(skb)) { 2739 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); 2740 if (err) 2741 return err; 2742 } 2743 2744 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 2745 mss = skb_shinfo(skb)->gso_size; 2746 if (skb->protocol == htons(ETH_P_IP)) { 2747 struct iphdr *iph = ip_hdr(skb); 2748 iph->tot_len = 0; 2749 iph->check = 0; 2750 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, 2751 iph->daddr, 0, 2752 IPPROTO_TCP, 2753 0); 2754 cmd_length = E1000_TXD_CMD_IP; 2755 ipcse = skb_transport_offset(skb) - 1; 2756 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2757 ipv6_hdr(skb)->payload_len = 0; 2758 tcp_hdr(skb)->check = 2759 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 2760 &ipv6_hdr(skb)->daddr, 2761 0, IPPROTO_TCP, 0); 2762 ipcse = 0; 2763 } 2764 ipcss = skb_network_offset(skb); 2765 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data; 2766 tucss = skb_transport_offset(skb); 2767 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; 2768 tucse = 0; 2769 2770 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | 2771 E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); 2772 2773 i = tx_ring->next_to_use; 2774 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 2775 buffer_info = &tx_ring->buffer_info[i]; 2776 2777 context_desc->lower_setup.ip_fields.ipcss = ipcss; 2778 context_desc->lower_setup.ip_fields.ipcso = ipcso; 2779 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); 2780 context_desc->upper_setup.tcp_fields.tucss = tucss; 2781 context_desc->upper_setup.tcp_fields.tucso = tucso; 2782 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse); 2783 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); 2784 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; 2785 context_desc->cmd_and_length = cpu_to_le32(cmd_length); 2786 2787 buffer_info->time_stamp = jiffies; 2788 buffer_info->next_to_watch = i; 2789 2790 if (++i == tx_ring->count) i = 0; 2791 tx_ring->next_to_use = i; 2792 2793 return true; 2794 } 2795 return false; 2796 } 2797 2798 static bool e1000_tx_csum(struct e1000_adapter *adapter, 2799 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) 2800 { 2801 struct e1000_context_desc *context_desc; 2802 struct e1000_buffer *buffer_info; 2803 unsigned int i; 2804 u8 css; 2805 u32 cmd_len = E1000_TXD_CMD_DEXT; 2806 2807 if (skb->ip_summed != CHECKSUM_PARTIAL) 2808 return false; 2809 2810 switch (skb->protocol) { 2811 case cpu_to_be16(ETH_P_IP): 2812 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 2813 cmd_len |= E1000_TXD_CMD_TCP; 2814 break; 2815 case cpu_to_be16(ETH_P_IPV6): 2816 /* XXX not handling all IPV6 headers */ 2817 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 2818 cmd_len |= E1000_TXD_CMD_TCP; 2819 break; 2820 default: 2821 if (unlikely(net_ratelimit())) 2822 e_warn(drv, "checksum_partial proto=%x!\n", 2823 skb->protocol); 2824 break; 2825 } 2826 2827 css = skb_checksum_start_offset(skb); 2828 2829 i = tx_ring->next_to_use; 2830 buffer_info = &tx_ring->buffer_info[i]; 2831 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); 2832 2833 context_desc->lower_setup.ip_config = 0; 2834 context_desc->upper_setup.tcp_fields.tucss = css; 2835 context_desc->upper_setup.tcp_fields.tucso = 2836 css + skb->csum_offset; 2837 context_desc->upper_setup.tcp_fields.tucse = 0; 2838 context_desc->tcp_seg_setup.data = 0; 2839 context_desc->cmd_and_length = cpu_to_le32(cmd_len); 2840 2841 buffer_info->time_stamp = jiffies; 2842 buffer_info->next_to_watch = i; 2843 2844 if (unlikely(++i == tx_ring->count)) i = 0; 2845 tx_ring->next_to_use = i; 2846 2847 return true; 2848 } 2849 2850 #define E1000_MAX_TXD_PWR 12 2851 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR) 2852 2853 static int e1000_tx_map(struct e1000_adapter *adapter, 2854 struct e1000_tx_ring *tx_ring, 2855 struct sk_buff *skb, unsigned int first, 2856 unsigned int max_per_txd, unsigned int nr_frags, 2857 unsigned int mss) 2858 { 2859 struct e1000_hw *hw = &adapter->hw; 2860 struct pci_dev *pdev = adapter->pdev; 2861 struct e1000_buffer *buffer_info; 2862 unsigned int len = skb_headlen(skb); 2863 unsigned int offset = 0, size, count = 0, i; 2864 unsigned int f, bytecount, segs; 2865 2866 i = tx_ring->next_to_use; 2867 2868 while (len) { 2869 buffer_info = &tx_ring->buffer_info[i]; 2870 size = min(len, max_per_txd); 2871 /* Workaround for Controller erratum -- 2872 * descriptor for non-tso packet in a linear SKB that follows a 2873 * tso gets written back prematurely before the data is fully 2874 * DMA'd to the controller */ 2875 if (!skb->data_len && tx_ring->last_tx_tso && 2876 !skb_is_gso(skb)) { 2877 tx_ring->last_tx_tso = false; 2878 size -= 4; 2879 } 2880 2881 /* Workaround for premature desc write-backs 2882 * in TSO mode. Append 4-byte sentinel desc */ 2883 if (unlikely(mss && !nr_frags && size == len && size > 8)) 2884 size -= 4; 2885 /* work-around for errata 10 and it applies 2886 * to all controllers in PCI-X mode 2887 * The fix is to make sure that the first descriptor of a 2888 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes 2889 */ 2890 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && 2891 (size > 2015) && count == 0)) 2892 size = 2015; 2893 2894 /* Workaround for potential 82544 hang in PCI-X. Avoid 2895 * terminating buffers within evenly-aligned dwords. */ 2896 if (unlikely(adapter->pcix_82544 && 2897 !((unsigned long)(skb->data + offset + size - 1) & 4) && 2898 size > 4)) 2899 size -= 4; 2900 2901 buffer_info->length = size; 2902 /* set time_stamp *before* dma to help avoid a possible race */ 2903 buffer_info->time_stamp = jiffies; 2904 buffer_info->mapped_as_page = false; 2905 buffer_info->dma = dma_map_single(&pdev->dev, 2906 skb->data + offset, 2907 size, DMA_TO_DEVICE); 2908 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 2909 goto dma_error; 2910 buffer_info->next_to_watch = i; 2911 2912 len -= size; 2913 offset += size; 2914 count++; 2915 if (len) { 2916 i++; 2917 if (unlikely(i == tx_ring->count)) 2918 i = 0; 2919 } 2920 } 2921 2922 for (f = 0; f < nr_frags; f++) { 2923 const struct skb_frag_struct *frag; 2924 2925 frag = &skb_shinfo(skb)->frags[f]; 2926 len = skb_frag_size(frag); 2927 offset = 0; 2928 2929 while (len) { 2930 unsigned long bufend; 2931 i++; 2932 if (unlikely(i == tx_ring->count)) 2933 i = 0; 2934 2935 buffer_info = &tx_ring->buffer_info[i]; 2936 size = min(len, max_per_txd); 2937 /* Workaround for premature desc write-backs 2938 * in TSO mode. Append 4-byte sentinel desc */ 2939 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8)) 2940 size -= 4; 2941 /* Workaround for potential 82544 hang in PCI-X. 2942 * Avoid terminating buffers within evenly-aligned 2943 * dwords. */ 2944 bufend = (unsigned long) 2945 page_to_phys(skb_frag_page(frag)); 2946 bufend += offset + size - 1; 2947 if (unlikely(adapter->pcix_82544 && 2948 !(bufend & 4) && 2949 size > 4)) 2950 size -= 4; 2951 2952 buffer_info->length = size; 2953 buffer_info->time_stamp = jiffies; 2954 buffer_info->mapped_as_page = true; 2955 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 2956 offset, size, DMA_TO_DEVICE); 2957 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) 2958 goto dma_error; 2959 buffer_info->next_to_watch = i; 2960 2961 len -= size; 2962 offset += size; 2963 count++; 2964 } 2965 } 2966 2967 segs = skb_shinfo(skb)->gso_segs ?: 1; 2968 /* multiply data chunks by size of headers */ 2969 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len; 2970 2971 tx_ring->buffer_info[i].skb = skb; 2972 tx_ring->buffer_info[i].segs = segs; 2973 tx_ring->buffer_info[i].bytecount = bytecount; 2974 tx_ring->buffer_info[first].next_to_watch = i; 2975 2976 return count; 2977 2978 dma_error: 2979 dev_err(&pdev->dev, "TX DMA map failed\n"); 2980 buffer_info->dma = 0; 2981 if (count) 2982 count--; 2983 2984 while (count--) { 2985 if (i==0) 2986 i += tx_ring->count; 2987 i--; 2988 buffer_info = &tx_ring->buffer_info[i]; 2989 e1000_unmap_and_free_tx_resource(adapter, buffer_info); 2990 } 2991 2992 return 0; 2993 } 2994 2995 static void e1000_tx_queue(struct e1000_adapter *adapter, 2996 struct e1000_tx_ring *tx_ring, int tx_flags, 2997 int count) 2998 { 2999 struct e1000_hw *hw = &adapter->hw; 3000 struct e1000_tx_desc *tx_desc = NULL; 3001 struct e1000_buffer *buffer_info; 3002 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; 3003 unsigned int i; 3004 3005 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) { 3006 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | 3007 E1000_TXD_CMD_TSE; 3008 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 3009 3010 if (likely(tx_flags & E1000_TX_FLAGS_IPV4)) 3011 txd_upper |= E1000_TXD_POPTS_IXSM << 8; 3012 } 3013 3014 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) { 3015 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; 3016 txd_upper |= E1000_TXD_POPTS_TXSM << 8; 3017 } 3018 3019 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) { 3020 txd_lower |= E1000_TXD_CMD_VLE; 3021 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); 3022 } 3023 3024 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 3025 txd_lower &= ~(E1000_TXD_CMD_IFCS); 3026 3027 i = tx_ring->next_to_use; 3028 3029 while (count--) { 3030 buffer_info = &tx_ring->buffer_info[i]; 3031 tx_desc = E1000_TX_DESC(*tx_ring, i); 3032 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 3033 tx_desc->lower.data = 3034 cpu_to_le32(txd_lower | buffer_info->length); 3035 tx_desc->upper.data = cpu_to_le32(txd_upper); 3036 if (unlikely(++i == tx_ring->count)) i = 0; 3037 } 3038 3039 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); 3040 3041 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */ 3042 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) 3043 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); 3044 3045 /* Force memory writes to complete before letting h/w 3046 * know there are new descriptors to fetch. (Only 3047 * applicable for weak-ordered memory model archs, 3048 * such as IA-64). */ 3049 wmb(); 3050 3051 tx_ring->next_to_use = i; 3052 writel(i, hw->hw_addr + tx_ring->tdt); 3053 /* we need this if more than one processor can write to our tail 3054 * at a time, it syncronizes IO on IA64/Altix systems */ 3055 mmiowb(); 3056 } 3057 3058 /* 82547 workaround to avoid controller hang in half-duplex environment. 3059 * The workaround is to avoid queuing a large packet that would span 3060 * the internal Tx FIFO ring boundary by notifying the stack to resend 3061 * the packet at a later time. This gives the Tx FIFO an opportunity to 3062 * flush all packets. When that occurs, we reset the Tx FIFO pointers 3063 * to the beginning of the Tx FIFO. 3064 */ 3065 3066 #define E1000_FIFO_HDR 0x10 3067 #define E1000_82547_PAD_LEN 0x3E0 3068 3069 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, 3070 struct sk_buff *skb) 3071 { 3072 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head; 3073 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR; 3074 3075 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR); 3076 3077 if (adapter->link_duplex != HALF_DUPLEX) 3078 goto no_fifo_stall_required; 3079 3080 if (atomic_read(&adapter->tx_fifo_stall)) 3081 return 1; 3082 3083 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) { 3084 atomic_set(&adapter->tx_fifo_stall, 1); 3085 return 1; 3086 } 3087 3088 no_fifo_stall_required: 3089 adapter->tx_fifo_head += skb_fifo_len; 3090 if (adapter->tx_fifo_head >= adapter->tx_fifo_size) 3091 adapter->tx_fifo_head -= adapter->tx_fifo_size; 3092 return 0; 3093 } 3094 3095 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size) 3096 { 3097 struct e1000_adapter *adapter = netdev_priv(netdev); 3098 struct e1000_tx_ring *tx_ring = adapter->tx_ring; 3099 3100 netif_stop_queue(netdev); 3101 /* Herbert's original patch had: 3102 * smp_mb__after_netif_stop_queue(); 3103 * but since that doesn't exist yet, just open code it. */ 3104 smp_mb(); 3105 3106 /* We need to check again in a case another CPU has just 3107 * made room available. */ 3108 if (likely(E1000_DESC_UNUSED(tx_ring) < size)) 3109 return -EBUSY; 3110 3111 /* A reprieve! */ 3112 netif_start_queue(netdev); 3113 ++adapter->restart_queue; 3114 return 0; 3115 } 3116 3117 static int e1000_maybe_stop_tx(struct net_device *netdev, 3118 struct e1000_tx_ring *tx_ring, int size) 3119 { 3120 if (likely(E1000_DESC_UNUSED(tx_ring) >= size)) 3121 return 0; 3122 return __e1000_maybe_stop_tx(netdev, size); 3123 } 3124 3125 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 ) 3126 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, 3127 struct net_device *netdev) 3128 { 3129 struct e1000_adapter *adapter = netdev_priv(netdev); 3130 struct e1000_hw *hw = &adapter->hw; 3131 struct e1000_tx_ring *tx_ring; 3132 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD; 3133 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR; 3134 unsigned int tx_flags = 0; 3135 unsigned int len = skb_headlen(skb); 3136 unsigned int nr_frags; 3137 unsigned int mss; 3138 int count = 0; 3139 int tso; 3140 unsigned int f; 3141 3142 /* This goes back to the question of how to logically map a tx queue 3143 * to a flow. Right now, performance is impacted slightly negatively 3144 * if using multiple tx queues. If the stack breaks away from a 3145 * single qdisc implementation, we can look at this again. */ 3146 tx_ring = adapter->tx_ring; 3147 3148 if (unlikely(skb->len <= 0)) { 3149 dev_kfree_skb_any(skb); 3150 return NETDEV_TX_OK; 3151 } 3152 3153 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN, 3154 * packets may get corrupted during padding by HW. 3155 * To WA this issue, pad all small packets manually. 3156 */ 3157 if (skb->len < ETH_ZLEN) { 3158 if (skb_pad(skb, ETH_ZLEN - skb->len)) 3159 return NETDEV_TX_OK; 3160 skb->len = ETH_ZLEN; 3161 skb_set_tail_pointer(skb, ETH_ZLEN); 3162 } 3163 3164 mss = skb_shinfo(skb)->gso_size; 3165 /* The controller does a simple calculation to 3166 * make sure there is enough room in the FIFO before 3167 * initiating the DMA for each buffer. The calc is: 3168 * 4 = ceil(buffer len/mss). To make sure we don't 3169 * overrun the FIFO, adjust the max buffer len if mss 3170 * drops. */ 3171 if (mss) { 3172 u8 hdr_len; 3173 max_per_txd = min(mss << 2, max_per_txd); 3174 max_txd_pwr = fls(max_per_txd) - 1; 3175 3176 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 3177 if (skb->data_len && hdr_len == len) { 3178 switch (hw->mac_type) { 3179 unsigned int pull_size; 3180 case e1000_82544: 3181 /* Make sure we have room to chop off 4 bytes, 3182 * and that the end alignment will work out to 3183 * this hardware's requirements 3184 * NOTE: this is a TSO only workaround 3185 * if end byte alignment not correct move us 3186 * into the next dword */ 3187 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4) 3188 break; 3189 /* fall through */ 3190 pull_size = min((unsigned int)4, skb->data_len); 3191 if (!__pskb_pull_tail(skb, pull_size)) { 3192 e_err(drv, "__pskb_pull_tail " 3193 "failed.\n"); 3194 dev_kfree_skb_any(skb); 3195 return NETDEV_TX_OK; 3196 } 3197 len = skb_headlen(skb); 3198 break; 3199 default: 3200 /* do nothing */ 3201 break; 3202 } 3203 } 3204 } 3205 3206 /* reserve a descriptor for the offload context */ 3207 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL)) 3208 count++; 3209 count++; 3210 3211 /* Controller Erratum workaround */ 3212 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb)) 3213 count++; 3214 3215 count += TXD_USE_COUNT(len, max_txd_pwr); 3216 3217 if (adapter->pcix_82544) 3218 count++; 3219 3220 /* work-around for errata 10 and it applies to all controllers 3221 * in PCI-X mode, so add one more descriptor to the count 3222 */ 3223 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && 3224 (len > 2015))) 3225 count++; 3226 3227 nr_frags = skb_shinfo(skb)->nr_frags; 3228 for (f = 0; f < nr_frags; f++) 3229 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]), 3230 max_txd_pwr); 3231 if (adapter->pcix_82544) 3232 count += nr_frags; 3233 3234 /* need: count + 2 desc gap to keep tail from touching 3235 * head, otherwise try next time */ 3236 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) 3237 return NETDEV_TX_BUSY; 3238 3239 if (unlikely((hw->mac_type == e1000_82547) && 3240 (e1000_82547_fifo_workaround(adapter, skb)))) { 3241 netif_stop_queue(netdev); 3242 if (!test_bit(__E1000_DOWN, &adapter->flags)) 3243 schedule_delayed_work(&adapter->fifo_stall_task, 1); 3244 return NETDEV_TX_BUSY; 3245 } 3246 3247 if (vlan_tx_tag_present(skb)) { 3248 tx_flags |= E1000_TX_FLAGS_VLAN; 3249 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT); 3250 } 3251 3252 first = tx_ring->next_to_use; 3253 3254 tso = e1000_tso(adapter, tx_ring, skb); 3255 if (tso < 0) { 3256 dev_kfree_skb_any(skb); 3257 return NETDEV_TX_OK; 3258 } 3259 3260 if (likely(tso)) { 3261 if (likely(hw->mac_type != e1000_82544)) 3262 tx_ring->last_tx_tso = true; 3263 tx_flags |= E1000_TX_FLAGS_TSO; 3264 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb))) 3265 tx_flags |= E1000_TX_FLAGS_CSUM; 3266 3267 if (likely(skb->protocol == htons(ETH_P_IP))) 3268 tx_flags |= E1000_TX_FLAGS_IPV4; 3269 3270 if (unlikely(skb->no_fcs)) 3271 tx_flags |= E1000_TX_FLAGS_NO_FCS; 3272 3273 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd, 3274 nr_frags, mss); 3275 3276 if (count) { 3277 netdev_sent_queue(netdev, skb->len); 3278 skb_tx_timestamp(skb); 3279 3280 e1000_tx_queue(adapter, tx_ring, tx_flags, count); 3281 /* Make sure there is space in the ring for the next send. */ 3282 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2); 3283 3284 } else { 3285 dev_kfree_skb_any(skb); 3286 tx_ring->buffer_info[first].time_stamp = 0; 3287 tx_ring->next_to_use = first; 3288 } 3289 3290 return NETDEV_TX_OK; 3291 } 3292 3293 #define NUM_REGS 38 /* 1 based count */ 3294 static void e1000_regdump(struct e1000_adapter *adapter) 3295 { 3296 struct e1000_hw *hw = &adapter->hw; 3297 u32 regs[NUM_REGS]; 3298 u32 *regs_buff = regs; 3299 int i = 0; 3300 3301 static const char * const reg_name[] = { 3302 "CTRL", "STATUS", 3303 "RCTL", "RDLEN", "RDH", "RDT", "RDTR", 3304 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT", 3305 "TIDV", "TXDCTL", "TADV", "TARC0", 3306 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1", 3307 "TXDCTL1", "TARC1", 3308 "CTRL_EXT", "ERT", "RDBAL", "RDBAH", 3309 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC", 3310 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC" 3311 }; 3312 3313 regs_buff[0] = er32(CTRL); 3314 regs_buff[1] = er32(STATUS); 3315 3316 regs_buff[2] = er32(RCTL); 3317 regs_buff[3] = er32(RDLEN); 3318 regs_buff[4] = er32(RDH); 3319 regs_buff[5] = er32(RDT); 3320 regs_buff[6] = er32(RDTR); 3321 3322 regs_buff[7] = er32(TCTL); 3323 regs_buff[8] = er32(TDBAL); 3324 regs_buff[9] = er32(TDBAH); 3325 regs_buff[10] = er32(TDLEN); 3326 regs_buff[11] = er32(TDH); 3327 regs_buff[12] = er32(TDT); 3328 regs_buff[13] = er32(TIDV); 3329 regs_buff[14] = er32(TXDCTL); 3330 regs_buff[15] = er32(TADV); 3331 regs_buff[16] = er32(TARC0); 3332 3333 regs_buff[17] = er32(TDBAL1); 3334 regs_buff[18] = er32(TDBAH1); 3335 regs_buff[19] = er32(TDLEN1); 3336 regs_buff[20] = er32(TDH1); 3337 regs_buff[21] = er32(TDT1); 3338 regs_buff[22] = er32(TXDCTL1); 3339 regs_buff[23] = er32(TARC1); 3340 regs_buff[24] = er32(CTRL_EXT); 3341 regs_buff[25] = er32(ERT); 3342 regs_buff[26] = er32(RDBAL0); 3343 regs_buff[27] = er32(RDBAH0); 3344 regs_buff[28] = er32(TDFH); 3345 regs_buff[29] = er32(TDFT); 3346 regs_buff[30] = er32(TDFHS); 3347 regs_buff[31] = er32(TDFTS); 3348 regs_buff[32] = er32(TDFPC); 3349 regs_buff[33] = er32(RDFH); 3350 regs_buff[34] = er32(RDFT); 3351 regs_buff[35] = er32(RDFHS); 3352 regs_buff[36] = er32(RDFTS); 3353 regs_buff[37] = er32(RDFPC); 3354 3355 pr_info("Register dump\n"); 3356 for (i = 0; i < NUM_REGS; i++) 3357 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]); 3358 } 3359 3360 /* 3361 * e1000_dump: Print registers, tx ring and rx ring 3362 */ 3363 static void e1000_dump(struct e1000_adapter *adapter) 3364 { 3365 /* this code doesn't handle multiple rings */ 3366 struct e1000_tx_ring *tx_ring = adapter->tx_ring; 3367 struct e1000_rx_ring *rx_ring = adapter->rx_ring; 3368 int i; 3369 3370 if (!netif_msg_hw(adapter)) 3371 return; 3372 3373 /* Print Registers */ 3374 e1000_regdump(adapter); 3375 3376 /* 3377 * transmit dump 3378 */ 3379 pr_info("TX Desc ring0 dump\n"); 3380 3381 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended) 3382 * 3383 * Legacy Transmit Descriptor 3384 * +--------------------------------------------------------------+ 3385 * 0 | Buffer Address [63:0] (Reserved on Write Back) | 3386 * +--------------------------------------------------------------+ 3387 * 8 | Special | CSS | Status | CMD | CSO | Length | 3388 * +--------------------------------------------------------------+ 3389 * 63 48 47 36 35 32 31 24 23 16 15 0 3390 * 3391 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload 3392 * 63 48 47 40 39 32 31 16 15 8 7 0 3393 * +----------------------------------------------------------------+ 3394 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS | 3395 * +----------------------------------------------------------------+ 3396 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN | 3397 * +----------------------------------------------------------------+ 3398 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 3399 * 3400 * Extended Data Descriptor (DTYP=0x1) 3401 * +----------------------------------------------------------------+ 3402 * 0 | Buffer Address [63:0] | 3403 * +----------------------------------------------------------------+ 3404 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN | 3405 * +----------------------------------------------------------------+ 3406 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 3407 */ 3408 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n"); 3409 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n"); 3410 3411 if (!netif_msg_tx_done(adapter)) 3412 goto rx_ring_summary; 3413 3414 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { 3415 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i); 3416 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i]; 3417 struct my_u { __le64 a; __le64 b; }; 3418 struct my_u *u = (struct my_u *)tx_desc; 3419 const char *type; 3420 3421 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean) 3422 type = "NTC/U"; 3423 else if (i == tx_ring->next_to_use) 3424 type = "NTU"; 3425 else if (i == tx_ring->next_to_clean) 3426 type = "NTC"; 3427 else 3428 type = ""; 3429 3430 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n", 3431 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i, 3432 le64_to_cpu(u->a), le64_to_cpu(u->b), 3433 (u64)buffer_info->dma, buffer_info->length, 3434 buffer_info->next_to_watch, 3435 (u64)buffer_info->time_stamp, buffer_info->skb, type); 3436 } 3437 3438 rx_ring_summary: 3439 /* 3440 * receive dump 3441 */ 3442 pr_info("\nRX Desc ring dump\n"); 3443 3444 /* Legacy Receive Descriptor Format 3445 * 3446 * +-----------------------------------------------------+ 3447 * | Buffer Address [63:0] | 3448 * +-----------------------------------------------------+ 3449 * | VLAN Tag | Errors | Status 0 | Packet csum | Length | 3450 * +-----------------------------------------------------+ 3451 * 63 48 47 40 39 32 31 16 15 0 3452 */ 3453 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n"); 3454 3455 if (!netif_msg_rx_status(adapter)) 3456 goto exit; 3457 3458 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) { 3459 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i); 3460 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i]; 3461 struct my_u { __le64 a; __le64 b; }; 3462 struct my_u *u = (struct my_u *)rx_desc; 3463 const char *type; 3464 3465 if (i == rx_ring->next_to_use) 3466 type = "NTU"; 3467 else if (i == rx_ring->next_to_clean) 3468 type = "NTC"; 3469 else 3470 type = ""; 3471 3472 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n", 3473 i, le64_to_cpu(u->a), le64_to_cpu(u->b), 3474 (u64)buffer_info->dma, buffer_info->skb, type); 3475 } /* for */ 3476 3477 /* dump the descriptor caches */ 3478 /* rx */ 3479 pr_info("Rx descriptor cache in 64bit format\n"); 3480 for (i = 0x6000; i <= 0x63FF ; i += 0x10) { 3481 pr_info("R%04X: %08X|%08X %08X|%08X\n", 3482 i, 3483 readl(adapter->hw.hw_addr + i+4), 3484 readl(adapter->hw.hw_addr + i), 3485 readl(adapter->hw.hw_addr + i+12), 3486 readl(adapter->hw.hw_addr + i+8)); 3487 } 3488 /* tx */ 3489 pr_info("Tx descriptor cache in 64bit format\n"); 3490 for (i = 0x7000; i <= 0x73FF ; i += 0x10) { 3491 pr_info("T%04X: %08X|%08X %08X|%08X\n", 3492 i, 3493 readl(adapter->hw.hw_addr + i+4), 3494 readl(adapter->hw.hw_addr + i), 3495 readl(adapter->hw.hw_addr + i+12), 3496 readl(adapter->hw.hw_addr + i+8)); 3497 } 3498 exit: 3499 return; 3500 } 3501 3502 /** 3503 * e1000_tx_timeout - Respond to a Tx Hang 3504 * @netdev: network interface device structure 3505 **/ 3506 3507 static void e1000_tx_timeout(struct net_device *netdev) 3508 { 3509 struct e1000_adapter *adapter = netdev_priv(netdev); 3510 3511 /* Do the reset outside of interrupt context */ 3512 adapter->tx_timeout_count++; 3513 schedule_work(&adapter->reset_task); 3514 } 3515 3516 static void e1000_reset_task(struct work_struct *work) 3517 { 3518 struct e1000_adapter *adapter = 3519 container_of(work, struct e1000_adapter, reset_task); 3520 3521 if (test_bit(__E1000_DOWN, &adapter->flags)) 3522 return; 3523 e_err(drv, "Reset adapter\n"); 3524 e1000_reinit_safe(adapter); 3525 } 3526 3527 /** 3528 * e1000_get_stats - Get System Network Statistics 3529 * @netdev: network interface device structure 3530 * 3531 * Returns the address of the device statistics structure. 3532 * The statistics are actually updated from the watchdog. 3533 **/ 3534 3535 static struct net_device_stats *e1000_get_stats(struct net_device *netdev) 3536 { 3537 /* only return the current stats */ 3538 return &netdev->stats; 3539 } 3540 3541 /** 3542 * e1000_change_mtu - Change the Maximum Transfer Unit 3543 * @netdev: network interface device structure 3544 * @new_mtu: new value for maximum frame size 3545 * 3546 * Returns 0 on success, negative on failure 3547 **/ 3548 3549 static int e1000_change_mtu(struct net_device *netdev, int new_mtu) 3550 { 3551 struct e1000_adapter *adapter = netdev_priv(netdev); 3552 struct e1000_hw *hw = &adapter->hw; 3553 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; 3554 3555 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) || 3556 (max_frame > MAX_JUMBO_FRAME_SIZE)) { 3557 e_err(probe, "Invalid MTU setting\n"); 3558 return -EINVAL; 3559 } 3560 3561 /* Adapter-specific max frame size limits. */ 3562 switch (hw->mac_type) { 3563 case e1000_undefined ... e1000_82542_rev2_1: 3564 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) { 3565 e_err(probe, "Jumbo Frames not supported.\n"); 3566 return -EINVAL; 3567 } 3568 break; 3569 default: 3570 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */ 3571 break; 3572 } 3573 3574 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) 3575 msleep(1); 3576 /* e1000_down has a dependency on max_frame_size */ 3577 hw->max_frame_size = max_frame; 3578 if (netif_running(netdev)) 3579 e1000_down(adapter); 3580 3581 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN 3582 * means we reserve 2 more, this pushes us to allocate from the next 3583 * larger slab size. 3584 * i.e. RXBUFFER_2048 --> size-4096 slab 3585 * however with the new *_jumbo_rx* routines, jumbo receives will use 3586 * fragmented skbs */ 3587 3588 if (max_frame <= E1000_RXBUFFER_2048) 3589 adapter->rx_buffer_len = E1000_RXBUFFER_2048; 3590 else 3591 #if (PAGE_SIZE >= E1000_RXBUFFER_16384) 3592 adapter->rx_buffer_len = E1000_RXBUFFER_16384; 3593 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096) 3594 adapter->rx_buffer_len = PAGE_SIZE; 3595 #endif 3596 3597 /* adjust allocation if LPE protects us, and we aren't using SBP */ 3598 if (!hw->tbi_compatibility_on && 3599 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) || 3600 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE))) 3601 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; 3602 3603 pr_info("%s changing MTU from %d to %d\n", 3604 netdev->name, netdev->mtu, new_mtu); 3605 netdev->mtu = new_mtu; 3606 3607 if (netif_running(netdev)) 3608 e1000_up(adapter); 3609 else 3610 e1000_reset(adapter); 3611 3612 clear_bit(__E1000_RESETTING, &adapter->flags); 3613 3614 return 0; 3615 } 3616 3617 /** 3618 * e1000_update_stats - Update the board statistics counters 3619 * @adapter: board private structure 3620 **/ 3621 3622 void e1000_update_stats(struct e1000_adapter *adapter) 3623 { 3624 struct net_device *netdev = adapter->netdev; 3625 struct e1000_hw *hw = &adapter->hw; 3626 struct pci_dev *pdev = adapter->pdev; 3627 unsigned long flags; 3628 u16 phy_tmp; 3629 3630 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF 3631 3632 /* 3633 * Prevent stats update while adapter is being reset, or if the pci 3634 * connection is down. 3635 */ 3636 if (adapter->link_speed == 0) 3637 return; 3638 if (pci_channel_offline(pdev)) 3639 return; 3640 3641 spin_lock_irqsave(&adapter->stats_lock, flags); 3642 3643 /* these counters are modified from e1000_tbi_adjust_stats, 3644 * called from the interrupt context, so they must only 3645 * be written while holding adapter->stats_lock 3646 */ 3647 3648 adapter->stats.crcerrs += er32(CRCERRS); 3649 adapter->stats.gprc += er32(GPRC); 3650 adapter->stats.gorcl += er32(GORCL); 3651 adapter->stats.gorch += er32(GORCH); 3652 adapter->stats.bprc += er32(BPRC); 3653 adapter->stats.mprc += er32(MPRC); 3654 adapter->stats.roc += er32(ROC); 3655 3656 adapter->stats.prc64 += er32(PRC64); 3657 adapter->stats.prc127 += er32(PRC127); 3658 adapter->stats.prc255 += er32(PRC255); 3659 adapter->stats.prc511 += er32(PRC511); 3660 adapter->stats.prc1023 += er32(PRC1023); 3661 adapter->stats.prc1522 += er32(PRC1522); 3662 3663 adapter->stats.symerrs += er32(SYMERRS); 3664 adapter->stats.mpc += er32(MPC); 3665 adapter->stats.scc += er32(SCC); 3666 adapter->stats.ecol += er32(ECOL); 3667 adapter->stats.mcc += er32(MCC); 3668 adapter->stats.latecol += er32(LATECOL); 3669 adapter->stats.dc += er32(DC); 3670 adapter->stats.sec += er32(SEC); 3671 adapter->stats.rlec += er32(RLEC); 3672 adapter->stats.xonrxc += er32(XONRXC); 3673 adapter->stats.xontxc += er32(XONTXC); 3674 adapter->stats.xoffrxc += er32(XOFFRXC); 3675 adapter->stats.xofftxc += er32(XOFFTXC); 3676 adapter->stats.fcruc += er32(FCRUC); 3677 adapter->stats.gptc += er32(GPTC); 3678 adapter->stats.gotcl += er32(GOTCL); 3679 adapter->stats.gotch += er32(GOTCH); 3680 adapter->stats.rnbc += er32(RNBC); 3681 adapter->stats.ruc += er32(RUC); 3682 adapter->stats.rfc += er32(RFC); 3683 adapter->stats.rjc += er32(RJC); 3684 adapter->stats.torl += er32(TORL); 3685 adapter->stats.torh += er32(TORH); 3686 adapter->stats.totl += er32(TOTL); 3687 adapter->stats.toth += er32(TOTH); 3688 adapter->stats.tpr += er32(TPR); 3689 3690 adapter->stats.ptc64 += er32(PTC64); 3691 adapter->stats.ptc127 += er32(PTC127); 3692 adapter->stats.ptc255 += er32(PTC255); 3693 adapter->stats.ptc511 += er32(PTC511); 3694 adapter->stats.ptc1023 += er32(PTC1023); 3695 adapter->stats.ptc1522 += er32(PTC1522); 3696 3697 adapter->stats.mptc += er32(MPTC); 3698 adapter->stats.bptc += er32(BPTC); 3699 3700 /* used for adaptive IFS */ 3701 3702 hw->tx_packet_delta = er32(TPT); 3703 adapter->stats.tpt += hw->tx_packet_delta; 3704 hw->collision_delta = er32(COLC); 3705 adapter->stats.colc += hw->collision_delta; 3706 3707 if (hw->mac_type >= e1000_82543) { 3708 adapter->stats.algnerrc += er32(ALGNERRC); 3709 adapter->stats.rxerrc += er32(RXERRC); 3710 adapter->stats.tncrs += er32(TNCRS); 3711 adapter->stats.cexterr += er32(CEXTERR); 3712 adapter->stats.tsctc += er32(TSCTC); 3713 adapter->stats.tsctfc += er32(TSCTFC); 3714 } 3715 3716 /* Fill out the OS statistics structure */ 3717 netdev->stats.multicast = adapter->stats.mprc; 3718 netdev->stats.collisions = adapter->stats.colc; 3719 3720 /* Rx Errors */ 3721 3722 /* RLEC on some newer hardware can be incorrect so build 3723 * our own version based on RUC and ROC */ 3724 netdev->stats.rx_errors = adapter->stats.rxerrc + 3725 adapter->stats.crcerrs + adapter->stats.algnerrc + 3726 adapter->stats.ruc + adapter->stats.roc + 3727 adapter->stats.cexterr; 3728 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc; 3729 netdev->stats.rx_length_errors = adapter->stats.rlerrc; 3730 netdev->stats.rx_crc_errors = adapter->stats.crcerrs; 3731 netdev->stats.rx_frame_errors = adapter->stats.algnerrc; 3732 netdev->stats.rx_missed_errors = adapter->stats.mpc; 3733 3734 /* Tx Errors */ 3735 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol; 3736 netdev->stats.tx_errors = adapter->stats.txerrc; 3737 netdev->stats.tx_aborted_errors = adapter->stats.ecol; 3738 netdev->stats.tx_window_errors = adapter->stats.latecol; 3739 netdev->stats.tx_carrier_errors = adapter->stats.tncrs; 3740 if (hw->bad_tx_carr_stats_fd && 3741 adapter->link_duplex == FULL_DUPLEX) { 3742 netdev->stats.tx_carrier_errors = 0; 3743 adapter->stats.tncrs = 0; 3744 } 3745 3746 /* Tx Dropped needs to be maintained elsewhere */ 3747 3748 /* Phy Stats */ 3749 if (hw->media_type == e1000_media_type_copper) { 3750 if ((adapter->link_speed == SPEED_1000) && 3751 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) { 3752 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK; 3753 adapter->phy_stats.idle_errors += phy_tmp; 3754 } 3755 3756 if ((hw->mac_type <= e1000_82546) && 3757 (hw->phy_type == e1000_phy_m88) && 3758 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp)) 3759 adapter->phy_stats.receive_errors += phy_tmp; 3760 } 3761 3762 /* Management Stats */ 3763 if (hw->has_smbus) { 3764 adapter->stats.mgptc += er32(MGTPTC); 3765 adapter->stats.mgprc += er32(MGTPRC); 3766 adapter->stats.mgpdc += er32(MGTPDC); 3767 } 3768 3769 spin_unlock_irqrestore(&adapter->stats_lock, flags); 3770 } 3771 3772 /** 3773 * e1000_intr - Interrupt Handler 3774 * @irq: interrupt number 3775 * @data: pointer to a network interface device structure 3776 **/ 3777 3778 static irqreturn_t e1000_intr(int irq, void *data) 3779 { 3780 struct net_device *netdev = data; 3781 struct e1000_adapter *adapter = netdev_priv(netdev); 3782 struct e1000_hw *hw = &adapter->hw; 3783 u32 icr = er32(ICR); 3784 3785 if (unlikely((!icr))) 3786 return IRQ_NONE; /* Not our interrupt */ 3787 3788 /* 3789 * we might have caused the interrupt, but the above 3790 * read cleared it, and just in case the driver is 3791 * down there is nothing to do so return handled 3792 */ 3793 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags))) 3794 return IRQ_HANDLED; 3795 3796 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) { 3797 hw->get_link_status = 1; 3798 /* guard against interrupt when we're going down */ 3799 if (!test_bit(__E1000_DOWN, &adapter->flags)) 3800 schedule_delayed_work(&adapter->watchdog_task, 1); 3801 } 3802 3803 /* disable interrupts, without the synchronize_irq bit */ 3804 ew32(IMC, ~0); 3805 E1000_WRITE_FLUSH(); 3806 3807 if (likely(napi_schedule_prep(&adapter->napi))) { 3808 adapter->total_tx_bytes = 0; 3809 adapter->total_tx_packets = 0; 3810 adapter->total_rx_bytes = 0; 3811 adapter->total_rx_packets = 0; 3812 __napi_schedule(&adapter->napi); 3813 } else { 3814 /* this really should not happen! if it does it is basically a 3815 * bug, but not a hard error, so enable ints and continue */ 3816 if (!test_bit(__E1000_DOWN, &adapter->flags)) 3817 e1000_irq_enable(adapter); 3818 } 3819 3820 return IRQ_HANDLED; 3821 } 3822 3823 /** 3824 * e1000_clean - NAPI Rx polling callback 3825 * @adapter: board private structure 3826 **/ 3827 static int e1000_clean(struct napi_struct *napi, int budget) 3828 { 3829 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi); 3830 int tx_clean_complete = 0, work_done = 0; 3831 3832 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]); 3833 3834 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget); 3835 3836 if (!tx_clean_complete) 3837 work_done = budget; 3838 3839 /* If budget not fully consumed, exit the polling mode */ 3840 if (work_done < budget) { 3841 if (likely(adapter->itr_setting & 3)) 3842 e1000_set_itr(adapter); 3843 napi_complete(napi); 3844 if (!test_bit(__E1000_DOWN, &adapter->flags)) 3845 e1000_irq_enable(adapter); 3846 } 3847 3848 return work_done; 3849 } 3850 3851 /** 3852 * e1000_clean_tx_irq - Reclaim resources after transmit completes 3853 * @adapter: board private structure 3854 **/ 3855 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, 3856 struct e1000_tx_ring *tx_ring) 3857 { 3858 struct e1000_hw *hw = &adapter->hw; 3859 struct net_device *netdev = adapter->netdev; 3860 struct e1000_tx_desc *tx_desc, *eop_desc; 3861 struct e1000_buffer *buffer_info; 3862 unsigned int i, eop; 3863 unsigned int count = 0; 3864 unsigned int total_tx_bytes=0, total_tx_packets=0; 3865 unsigned int bytes_compl = 0, pkts_compl = 0; 3866 3867 i = tx_ring->next_to_clean; 3868 eop = tx_ring->buffer_info[i].next_to_watch; 3869 eop_desc = E1000_TX_DESC(*tx_ring, eop); 3870 3871 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) && 3872 (count < tx_ring->count)) { 3873 bool cleaned = false; 3874 rmb(); /* read buffer_info after eop_desc */ 3875 for ( ; !cleaned; count++) { 3876 tx_desc = E1000_TX_DESC(*tx_ring, i); 3877 buffer_info = &tx_ring->buffer_info[i]; 3878 cleaned = (i == eop); 3879 3880 if (cleaned) { 3881 total_tx_packets += buffer_info->segs; 3882 total_tx_bytes += buffer_info->bytecount; 3883 if (buffer_info->skb) { 3884 bytes_compl += buffer_info->skb->len; 3885 pkts_compl++; 3886 } 3887 3888 } 3889 e1000_unmap_and_free_tx_resource(adapter, buffer_info); 3890 tx_desc->upper.data = 0; 3891 3892 if (unlikely(++i == tx_ring->count)) i = 0; 3893 } 3894 3895 eop = tx_ring->buffer_info[i].next_to_watch; 3896 eop_desc = E1000_TX_DESC(*tx_ring, eop); 3897 } 3898 3899 tx_ring->next_to_clean = i; 3900 3901 netdev_completed_queue(netdev, pkts_compl, bytes_compl); 3902 3903 #define TX_WAKE_THRESHOLD 32 3904 if (unlikely(count && netif_carrier_ok(netdev) && 3905 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) { 3906 /* Make sure that anybody stopping the queue after this 3907 * sees the new next_to_clean. 3908 */ 3909 smp_mb(); 3910 3911 if (netif_queue_stopped(netdev) && 3912 !(test_bit(__E1000_DOWN, &adapter->flags))) { 3913 netif_wake_queue(netdev); 3914 ++adapter->restart_queue; 3915 } 3916 } 3917 3918 if (adapter->detect_tx_hung) { 3919 /* Detect a transmit hang in hardware, this serializes the 3920 * check with the clearing of time_stamp and movement of i */ 3921 adapter->detect_tx_hung = false; 3922 if (tx_ring->buffer_info[eop].time_stamp && 3923 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + 3924 (adapter->tx_timeout_factor * HZ)) && 3925 !(er32(STATUS) & E1000_STATUS_TXOFF)) { 3926 3927 /* detected Tx unit hang */ 3928 e_err(drv, "Detected Tx Unit Hang\n" 3929 " Tx Queue <%lu>\n" 3930 " TDH <%x>\n" 3931 " TDT <%x>\n" 3932 " next_to_use <%x>\n" 3933 " next_to_clean <%x>\n" 3934 "buffer_info[next_to_clean]\n" 3935 " time_stamp <%lx>\n" 3936 " next_to_watch <%x>\n" 3937 " jiffies <%lx>\n" 3938 " next_to_watch.status <%x>\n", 3939 (unsigned long)((tx_ring - adapter->tx_ring) / 3940 sizeof(struct e1000_tx_ring)), 3941 readl(hw->hw_addr + tx_ring->tdh), 3942 readl(hw->hw_addr + tx_ring->tdt), 3943 tx_ring->next_to_use, 3944 tx_ring->next_to_clean, 3945 tx_ring->buffer_info[eop].time_stamp, 3946 eop, 3947 jiffies, 3948 eop_desc->upper.fields.status); 3949 e1000_dump(adapter); 3950 netif_stop_queue(netdev); 3951 } 3952 } 3953 adapter->total_tx_bytes += total_tx_bytes; 3954 adapter->total_tx_packets += total_tx_packets; 3955 netdev->stats.tx_bytes += total_tx_bytes; 3956 netdev->stats.tx_packets += total_tx_packets; 3957 return count < tx_ring->count; 3958 } 3959 3960 /** 3961 * e1000_rx_checksum - Receive Checksum Offload for 82543 3962 * @adapter: board private structure 3963 * @status_err: receive descriptor status and error fields 3964 * @csum: receive descriptor csum field 3965 * @sk_buff: socket buffer with received data 3966 **/ 3967 3968 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, 3969 u32 csum, struct sk_buff *skb) 3970 { 3971 struct e1000_hw *hw = &adapter->hw; 3972 u16 status = (u16)status_err; 3973 u8 errors = (u8)(status_err >> 24); 3974 3975 skb_checksum_none_assert(skb); 3976 3977 /* 82543 or newer only */ 3978 if (unlikely(hw->mac_type < e1000_82543)) return; 3979 /* Ignore Checksum bit is set */ 3980 if (unlikely(status & E1000_RXD_STAT_IXSM)) return; 3981 /* TCP/UDP checksum error bit is set */ 3982 if (unlikely(errors & E1000_RXD_ERR_TCPE)) { 3983 /* let the stack verify checksum errors */ 3984 adapter->hw_csum_err++; 3985 return; 3986 } 3987 /* TCP/UDP Checksum has not been calculated */ 3988 if (!(status & E1000_RXD_STAT_TCPCS)) 3989 return; 3990 3991 /* It must be a TCP or UDP packet with a valid checksum */ 3992 if (likely(status & E1000_RXD_STAT_TCPCS)) { 3993 /* TCP checksum is good */ 3994 skb->ip_summed = CHECKSUM_UNNECESSARY; 3995 } 3996 adapter->hw_csum_good++; 3997 } 3998 3999 /** 4000 * e1000_consume_page - helper function 4001 **/ 4002 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, 4003 u16 length) 4004 { 4005 bi->page = NULL; 4006 skb->len += length; 4007 skb->data_len += length; 4008 skb->truesize += PAGE_SIZE; 4009 } 4010 4011 /** 4012 * e1000_receive_skb - helper function to handle rx indications 4013 * @adapter: board private structure 4014 * @status: descriptor status field as written by hardware 4015 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) 4016 * @skb: pointer to sk_buff to be indicated to stack 4017 */ 4018 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status, 4019 __le16 vlan, struct sk_buff *skb) 4020 { 4021 skb->protocol = eth_type_trans(skb, adapter->netdev); 4022 4023 if (status & E1000_RXD_STAT_VP) { 4024 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; 4025 4026 __vlan_hwaccel_put_tag(skb, vid); 4027 } 4028 napi_gro_receive(&adapter->napi, skb); 4029 } 4030 4031 /** 4032 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy 4033 * @adapter: board private structure 4034 * @rx_ring: ring to clean 4035 * @work_done: amount of napi work completed this call 4036 * @work_to_do: max amount of work allowed for this call to do 4037 * 4038 * the return value indicates whether actual cleaning was done, there 4039 * is no guarantee that everything was cleaned 4040 */ 4041 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, 4042 struct e1000_rx_ring *rx_ring, 4043 int *work_done, int work_to_do) 4044 { 4045 struct e1000_hw *hw = &adapter->hw; 4046 struct net_device *netdev = adapter->netdev; 4047 struct pci_dev *pdev = adapter->pdev; 4048 struct e1000_rx_desc *rx_desc, *next_rxd; 4049 struct e1000_buffer *buffer_info, *next_buffer; 4050 unsigned long irq_flags; 4051 u32 length; 4052 unsigned int i; 4053 int cleaned_count = 0; 4054 bool cleaned = false; 4055 unsigned int total_rx_bytes=0, total_rx_packets=0; 4056 4057 i = rx_ring->next_to_clean; 4058 rx_desc = E1000_RX_DESC(*rx_ring, i); 4059 buffer_info = &rx_ring->buffer_info[i]; 4060 4061 while (rx_desc->status & E1000_RXD_STAT_DD) { 4062 struct sk_buff *skb; 4063 u8 status; 4064 4065 if (*work_done >= work_to_do) 4066 break; 4067 (*work_done)++; 4068 rmb(); /* read descriptor and rx_buffer_info after status DD */ 4069 4070 status = rx_desc->status; 4071 skb = buffer_info->skb; 4072 buffer_info->skb = NULL; 4073 4074 if (++i == rx_ring->count) i = 0; 4075 next_rxd = E1000_RX_DESC(*rx_ring, i); 4076 prefetch(next_rxd); 4077 4078 next_buffer = &rx_ring->buffer_info[i]; 4079 4080 cleaned = true; 4081 cleaned_count++; 4082 dma_unmap_page(&pdev->dev, buffer_info->dma, 4083 buffer_info->length, DMA_FROM_DEVICE); 4084 buffer_info->dma = 0; 4085 4086 length = le16_to_cpu(rx_desc->length); 4087 4088 /* errors is only valid for DD + EOP descriptors */ 4089 if (unlikely((status & E1000_RXD_STAT_EOP) && 4090 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) { 4091 u8 *mapped; 4092 u8 last_byte; 4093 4094 mapped = page_address(buffer_info->page); 4095 last_byte = *(mapped + length - 1); 4096 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, 4097 last_byte)) { 4098 spin_lock_irqsave(&adapter->stats_lock, 4099 irq_flags); 4100 e1000_tbi_adjust_stats(hw, &adapter->stats, 4101 length, mapped); 4102 spin_unlock_irqrestore(&adapter->stats_lock, 4103 irq_flags); 4104 length--; 4105 } else { 4106 if (netdev->features & NETIF_F_RXALL) 4107 goto process_skb; 4108 /* recycle both page and skb */ 4109 buffer_info->skb = skb; 4110 /* an error means any chain goes out the window 4111 * too */ 4112 if (rx_ring->rx_skb_top) 4113 dev_kfree_skb(rx_ring->rx_skb_top); 4114 rx_ring->rx_skb_top = NULL; 4115 goto next_desc; 4116 } 4117 } 4118 4119 #define rxtop rx_ring->rx_skb_top 4120 process_skb: 4121 if (!(status & E1000_RXD_STAT_EOP)) { 4122 /* this descriptor is only the beginning (or middle) */ 4123 if (!rxtop) { 4124 /* this is the beginning of a chain */ 4125 rxtop = skb; 4126 skb_fill_page_desc(rxtop, 0, buffer_info->page, 4127 0, length); 4128 } else { 4129 /* this is the middle of a chain */ 4130 skb_fill_page_desc(rxtop, 4131 skb_shinfo(rxtop)->nr_frags, 4132 buffer_info->page, 0, length); 4133 /* re-use the skb, only consumed the page */ 4134 buffer_info->skb = skb; 4135 } 4136 e1000_consume_page(buffer_info, rxtop, length); 4137 goto next_desc; 4138 } else { 4139 if (rxtop) { 4140 /* end of the chain */ 4141 skb_fill_page_desc(rxtop, 4142 skb_shinfo(rxtop)->nr_frags, 4143 buffer_info->page, 0, length); 4144 /* re-use the current skb, we only consumed the 4145 * page */ 4146 buffer_info->skb = skb; 4147 skb = rxtop; 4148 rxtop = NULL; 4149 e1000_consume_page(buffer_info, skb, length); 4150 } else { 4151 /* no chain, got EOP, this buf is the packet 4152 * copybreak to save the put_page/alloc_page */ 4153 if (length <= copybreak && 4154 skb_tailroom(skb) >= length) { 4155 u8 *vaddr; 4156 vaddr = kmap_atomic(buffer_info->page); 4157 memcpy(skb_tail_pointer(skb), vaddr, length); 4158 kunmap_atomic(vaddr); 4159 /* re-use the page, so don't erase 4160 * buffer_info->page */ 4161 skb_put(skb, length); 4162 } else { 4163 skb_fill_page_desc(skb, 0, 4164 buffer_info->page, 0, 4165 length); 4166 e1000_consume_page(buffer_info, skb, 4167 length); 4168 } 4169 } 4170 } 4171 4172 /* Receive Checksum Offload XXX recompute due to CRC strip? */ 4173 e1000_rx_checksum(adapter, 4174 (u32)(status) | 4175 ((u32)(rx_desc->errors) << 24), 4176 le16_to_cpu(rx_desc->csum), skb); 4177 4178 total_rx_bytes += (skb->len - 4); /* don't count FCS */ 4179 if (likely(!(netdev->features & NETIF_F_RXFCS))) 4180 pskb_trim(skb, skb->len - 4); 4181 total_rx_packets++; 4182 4183 /* eth type trans needs skb->data to point to something */ 4184 if (!pskb_may_pull(skb, ETH_HLEN)) { 4185 e_err(drv, "pskb_may_pull failed.\n"); 4186 dev_kfree_skb(skb); 4187 goto next_desc; 4188 } 4189 4190 e1000_receive_skb(adapter, status, rx_desc->special, skb); 4191 4192 next_desc: 4193 rx_desc->status = 0; 4194 4195 /* return some buffers to hardware, one at a time is too slow */ 4196 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { 4197 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); 4198 cleaned_count = 0; 4199 } 4200 4201 /* use prefetched values */ 4202 rx_desc = next_rxd; 4203 buffer_info = next_buffer; 4204 } 4205 rx_ring->next_to_clean = i; 4206 4207 cleaned_count = E1000_DESC_UNUSED(rx_ring); 4208 if (cleaned_count) 4209 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); 4210 4211 adapter->total_rx_packets += total_rx_packets; 4212 adapter->total_rx_bytes += total_rx_bytes; 4213 netdev->stats.rx_bytes += total_rx_bytes; 4214 netdev->stats.rx_packets += total_rx_packets; 4215 return cleaned; 4216 } 4217 4218 /* 4219 * this should improve performance for small packets with large amounts 4220 * of reassembly being done in the stack 4221 */ 4222 static void e1000_check_copybreak(struct net_device *netdev, 4223 struct e1000_buffer *buffer_info, 4224 u32 length, struct sk_buff **skb) 4225 { 4226 struct sk_buff *new_skb; 4227 4228 if (length > copybreak) 4229 return; 4230 4231 new_skb = netdev_alloc_skb_ip_align(netdev, length); 4232 if (!new_skb) 4233 return; 4234 4235 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN, 4236 (*skb)->data - NET_IP_ALIGN, 4237 length + NET_IP_ALIGN); 4238 /* save the skb in buffer_info as good */ 4239 buffer_info->skb = *skb; 4240 *skb = new_skb; 4241 } 4242 4243 /** 4244 * e1000_clean_rx_irq - Send received data up the network stack; legacy 4245 * @adapter: board private structure 4246 * @rx_ring: ring to clean 4247 * @work_done: amount of napi work completed this call 4248 * @work_to_do: max amount of work allowed for this call to do 4249 */ 4250 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, 4251 struct e1000_rx_ring *rx_ring, 4252 int *work_done, int work_to_do) 4253 { 4254 struct e1000_hw *hw = &adapter->hw; 4255 struct net_device *netdev = adapter->netdev; 4256 struct pci_dev *pdev = adapter->pdev; 4257 struct e1000_rx_desc *rx_desc, *next_rxd; 4258 struct e1000_buffer *buffer_info, *next_buffer; 4259 unsigned long flags; 4260 u32 length; 4261 unsigned int i; 4262 int cleaned_count = 0; 4263 bool cleaned = false; 4264 unsigned int total_rx_bytes=0, total_rx_packets=0; 4265 4266 i = rx_ring->next_to_clean; 4267 rx_desc = E1000_RX_DESC(*rx_ring, i); 4268 buffer_info = &rx_ring->buffer_info[i]; 4269 4270 while (rx_desc->status & E1000_RXD_STAT_DD) { 4271 struct sk_buff *skb; 4272 u8 status; 4273 4274 if (*work_done >= work_to_do) 4275 break; 4276 (*work_done)++; 4277 rmb(); /* read descriptor and rx_buffer_info after status DD */ 4278 4279 status = rx_desc->status; 4280 skb = buffer_info->skb; 4281 buffer_info->skb = NULL; 4282 4283 prefetch(skb->data - NET_IP_ALIGN); 4284 4285 if (++i == rx_ring->count) i = 0; 4286 next_rxd = E1000_RX_DESC(*rx_ring, i); 4287 prefetch(next_rxd); 4288 4289 next_buffer = &rx_ring->buffer_info[i]; 4290 4291 cleaned = true; 4292 cleaned_count++; 4293 dma_unmap_single(&pdev->dev, buffer_info->dma, 4294 buffer_info->length, DMA_FROM_DEVICE); 4295 buffer_info->dma = 0; 4296 4297 length = le16_to_cpu(rx_desc->length); 4298 /* !EOP means multiple descriptors were used to store a single 4299 * packet, if thats the case we need to toss it. In fact, we 4300 * to toss every packet with the EOP bit clear and the next 4301 * frame that _does_ have the EOP bit set, as it is by 4302 * definition only a frame fragment 4303 */ 4304 if (unlikely(!(status & E1000_RXD_STAT_EOP))) 4305 adapter->discarding = true; 4306 4307 if (adapter->discarding) { 4308 /* All receives must fit into a single buffer */ 4309 e_dbg("Receive packet consumed multiple buffers\n"); 4310 /* recycle */ 4311 buffer_info->skb = skb; 4312 if (status & E1000_RXD_STAT_EOP) 4313 adapter->discarding = false; 4314 goto next_desc; 4315 } 4316 4317 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) { 4318 u8 last_byte = *(skb->data + length - 1); 4319 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, 4320 last_byte)) { 4321 spin_lock_irqsave(&adapter->stats_lock, flags); 4322 e1000_tbi_adjust_stats(hw, &adapter->stats, 4323 length, skb->data); 4324 spin_unlock_irqrestore(&adapter->stats_lock, 4325 flags); 4326 length--; 4327 } else { 4328 if (netdev->features & NETIF_F_RXALL) 4329 goto process_skb; 4330 /* recycle */ 4331 buffer_info->skb = skb; 4332 goto next_desc; 4333 } 4334 } 4335 4336 process_skb: 4337 total_rx_bytes += (length - 4); /* don't count FCS */ 4338 total_rx_packets++; 4339 4340 if (likely(!(netdev->features & NETIF_F_RXFCS))) 4341 /* adjust length to remove Ethernet CRC, this must be 4342 * done after the TBI_ACCEPT workaround above 4343 */ 4344 length -= 4; 4345 4346 e1000_check_copybreak(netdev, buffer_info, length, &skb); 4347 4348 skb_put(skb, length); 4349 4350 /* Receive Checksum Offload */ 4351 e1000_rx_checksum(adapter, 4352 (u32)(status) | 4353 ((u32)(rx_desc->errors) << 24), 4354 le16_to_cpu(rx_desc->csum), skb); 4355 4356 e1000_receive_skb(adapter, status, rx_desc->special, skb); 4357 4358 next_desc: 4359 rx_desc->status = 0; 4360 4361 /* return some buffers to hardware, one at a time is too slow */ 4362 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { 4363 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); 4364 cleaned_count = 0; 4365 } 4366 4367 /* use prefetched values */ 4368 rx_desc = next_rxd; 4369 buffer_info = next_buffer; 4370 } 4371 rx_ring->next_to_clean = i; 4372 4373 cleaned_count = E1000_DESC_UNUSED(rx_ring); 4374 if (cleaned_count) 4375 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); 4376 4377 adapter->total_rx_packets += total_rx_packets; 4378 adapter->total_rx_bytes += total_rx_bytes; 4379 netdev->stats.rx_bytes += total_rx_bytes; 4380 netdev->stats.rx_packets += total_rx_packets; 4381 return cleaned; 4382 } 4383 4384 /** 4385 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers 4386 * @adapter: address of board private structure 4387 * @rx_ring: pointer to receive ring structure 4388 * @cleaned_count: number of buffers to allocate this pass 4389 **/ 4390 4391 static void 4392 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, 4393 struct e1000_rx_ring *rx_ring, int cleaned_count) 4394 { 4395 struct net_device *netdev = adapter->netdev; 4396 struct pci_dev *pdev = adapter->pdev; 4397 struct e1000_rx_desc *rx_desc; 4398 struct e1000_buffer *buffer_info; 4399 struct sk_buff *skb; 4400 unsigned int i; 4401 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ; 4402 4403 i = rx_ring->next_to_use; 4404 buffer_info = &rx_ring->buffer_info[i]; 4405 4406 while (cleaned_count--) { 4407 skb = buffer_info->skb; 4408 if (skb) { 4409 skb_trim(skb, 0); 4410 goto check_page; 4411 } 4412 4413 skb = netdev_alloc_skb_ip_align(netdev, bufsz); 4414 if (unlikely(!skb)) { 4415 /* Better luck next round */ 4416 adapter->alloc_rx_buff_failed++; 4417 break; 4418 } 4419 4420 buffer_info->skb = skb; 4421 buffer_info->length = adapter->rx_buffer_len; 4422 check_page: 4423 /* allocate a new page if necessary */ 4424 if (!buffer_info->page) { 4425 buffer_info->page = alloc_page(GFP_ATOMIC); 4426 if (unlikely(!buffer_info->page)) { 4427 adapter->alloc_rx_buff_failed++; 4428 break; 4429 } 4430 } 4431 4432 if (!buffer_info->dma) { 4433 buffer_info->dma = dma_map_page(&pdev->dev, 4434 buffer_info->page, 0, 4435 buffer_info->length, 4436 DMA_FROM_DEVICE); 4437 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 4438 put_page(buffer_info->page); 4439 dev_kfree_skb(skb); 4440 buffer_info->page = NULL; 4441 buffer_info->skb = NULL; 4442 buffer_info->dma = 0; 4443 adapter->alloc_rx_buff_failed++; 4444 break; /* while !buffer_info->skb */ 4445 } 4446 } 4447 4448 rx_desc = E1000_RX_DESC(*rx_ring, i); 4449 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 4450 4451 if (unlikely(++i == rx_ring->count)) 4452 i = 0; 4453 buffer_info = &rx_ring->buffer_info[i]; 4454 } 4455 4456 if (likely(rx_ring->next_to_use != i)) { 4457 rx_ring->next_to_use = i; 4458 if (unlikely(i-- == 0)) 4459 i = (rx_ring->count - 1); 4460 4461 /* Force memory writes to complete before letting h/w 4462 * know there are new descriptors to fetch. (Only 4463 * applicable for weak-ordered memory model archs, 4464 * such as IA-64). */ 4465 wmb(); 4466 writel(i, adapter->hw.hw_addr + rx_ring->rdt); 4467 } 4468 } 4469 4470 /** 4471 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended 4472 * @adapter: address of board private structure 4473 **/ 4474 4475 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, 4476 struct e1000_rx_ring *rx_ring, 4477 int cleaned_count) 4478 { 4479 struct e1000_hw *hw = &adapter->hw; 4480 struct net_device *netdev = adapter->netdev; 4481 struct pci_dev *pdev = adapter->pdev; 4482 struct e1000_rx_desc *rx_desc; 4483 struct e1000_buffer *buffer_info; 4484 struct sk_buff *skb; 4485 unsigned int i; 4486 unsigned int bufsz = adapter->rx_buffer_len; 4487 4488 i = rx_ring->next_to_use; 4489 buffer_info = &rx_ring->buffer_info[i]; 4490 4491 while (cleaned_count--) { 4492 skb = buffer_info->skb; 4493 if (skb) { 4494 skb_trim(skb, 0); 4495 goto map_skb; 4496 } 4497 4498 skb = netdev_alloc_skb_ip_align(netdev, bufsz); 4499 if (unlikely(!skb)) { 4500 /* Better luck next round */ 4501 adapter->alloc_rx_buff_failed++; 4502 break; 4503 } 4504 4505 /* Fix for errata 23, can't cross 64kB boundary */ 4506 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { 4507 struct sk_buff *oldskb = skb; 4508 e_err(rx_err, "skb align check failed: %u bytes at " 4509 "%p\n", bufsz, skb->data); 4510 /* Try again, without freeing the previous */ 4511 skb = netdev_alloc_skb_ip_align(netdev, bufsz); 4512 /* Failed allocation, critical failure */ 4513 if (!skb) { 4514 dev_kfree_skb(oldskb); 4515 adapter->alloc_rx_buff_failed++; 4516 break; 4517 } 4518 4519 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { 4520 /* give up */ 4521 dev_kfree_skb(skb); 4522 dev_kfree_skb(oldskb); 4523 adapter->alloc_rx_buff_failed++; 4524 break; /* while !buffer_info->skb */ 4525 } 4526 4527 /* Use new allocation */ 4528 dev_kfree_skb(oldskb); 4529 } 4530 buffer_info->skb = skb; 4531 buffer_info->length = adapter->rx_buffer_len; 4532 map_skb: 4533 buffer_info->dma = dma_map_single(&pdev->dev, 4534 skb->data, 4535 buffer_info->length, 4536 DMA_FROM_DEVICE); 4537 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { 4538 dev_kfree_skb(skb); 4539 buffer_info->skb = NULL; 4540 buffer_info->dma = 0; 4541 adapter->alloc_rx_buff_failed++; 4542 break; /* while !buffer_info->skb */ 4543 } 4544 4545 /* 4546 * XXX if it was allocated cleanly it will never map to a 4547 * boundary crossing 4548 */ 4549 4550 /* Fix for errata 23, can't cross 64kB boundary */ 4551 if (!e1000_check_64k_bound(adapter, 4552 (void *)(unsigned long)buffer_info->dma, 4553 adapter->rx_buffer_len)) { 4554 e_err(rx_err, "dma align check failed: %u bytes at " 4555 "%p\n", adapter->rx_buffer_len, 4556 (void *)(unsigned long)buffer_info->dma); 4557 dev_kfree_skb(skb); 4558 buffer_info->skb = NULL; 4559 4560 dma_unmap_single(&pdev->dev, buffer_info->dma, 4561 adapter->rx_buffer_len, 4562 DMA_FROM_DEVICE); 4563 buffer_info->dma = 0; 4564 4565 adapter->alloc_rx_buff_failed++; 4566 break; /* while !buffer_info->skb */ 4567 } 4568 rx_desc = E1000_RX_DESC(*rx_ring, i); 4569 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); 4570 4571 if (unlikely(++i == rx_ring->count)) 4572 i = 0; 4573 buffer_info = &rx_ring->buffer_info[i]; 4574 } 4575 4576 if (likely(rx_ring->next_to_use != i)) { 4577 rx_ring->next_to_use = i; 4578 if (unlikely(i-- == 0)) 4579 i = (rx_ring->count - 1); 4580 4581 /* Force memory writes to complete before letting h/w 4582 * know there are new descriptors to fetch. (Only 4583 * applicable for weak-ordered memory model archs, 4584 * such as IA-64). */ 4585 wmb(); 4586 writel(i, hw->hw_addr + rx_ring->rdt); 4587 } 4588 } 4589 4590 /** 4591 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers. 4592 * @adapter: 4593 **/ 4594 4595 static void e1000_smartspeed(struct e1000_adapter *adapter) 4596 { 4597 struct e1000_hw *hw = &adapter->hw; 4598 u16 phy_status; 4599 u16 phy_ctrl; 4600 4601 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg || 4602 !(hw->autoneg_advertised & ADVERTISE_1000_FULL)) 4603 return; 4604 4605 if (adapter->smartspeed == 0) { 4606 /* If Master/Slave config fault is asserted twice, 4607 * we assume back-to-back */ 4608 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); 4609 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; 4610 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); 4611 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; 4612 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); 4613 if (phy_ctrl & CR_1000T_MS_ENABLE) { 4614 phy_ctrl &= ~CR_1000T_MS_ENABLE; 4615 e1000_write_phy_reg(hw, PHY_1000T_CTRL, 4616 phy_ctrl); 4617 adapter->smartspeed++; 4618 if (!e1000_phy_setup_autoneg(hw) && 4619 !e1000_read_phy_reg(hw, PHY_CTRL, 4620 &phy_ctrl)) { 4621 phy_ctrl |= (MII_CR_AUTO_NEG_EN | 4622 MII_CR_RESTART_AUTO_NEG); 4623 e1000_write_phy_reg(hw, PHY_CTRL, 4624 phy_ctrl); 4625 } 4626 } 4627 return; 4628 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) { 4629 /* If still no link, perhaps using 2/3 pair cable */ 4630 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); 4631 phy_ctrl |= CR_1000T_MS_ENABLE; 4632 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl); 4633 if (!e1000_phy_setup_autoneg(hw) && 4634 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) { 4635 phy_ctrl |= (MII_CR_AUTO_NEG_EN | 4636 MII_CR_RESTART_AUTO_NEG); 4637 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl); 4638 } 4639 } 4640 /* Restart process after E1000_SMARTSPEED_MAX iterations */ 4641 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX) 4642 adapter->smartspeed = 0; 4643 } 4644 4645 /** 4646 * e1000_ioctl - 4647 * @netdev: 4648 * @ifreq: 4649 * @cmd: 4650 **/ 4651 4652 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 4653 { 4654 switch (cmd) { 4655 case SIOCGMIIPHY: 4656 case SIOCGMIIREG: 4657 case SIOCSMIIREG: 4658 return e1000_mii_ioctl(netdev, ifr, cmd); 4659 default: 4660 return -EOPNOTSUPP; 4661 } 4662 } 4663 4664 /** 4665 * e1000_mii_ioctl - 4666 * @netdev: 4667 * @ifreq: 4668 * @cmd: 4669 **/ 4670 4671 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, 4672 int cmd) 4673 { 4674 struct e1000_adapter *adapter = netdev_priv(netdev); 4675 struct e1000_hw *hw = &adapter->hw; 4676 struct mii_ioctl_data *data = if_mii(ifr); 4677 int retval; 4678 u16 mii_reg; 4679 unsigned long flags; 4680 4681 if (hw->media_type != e1000_media_type_copper) 4682 return -EOPNOTSUPP; 4683 4684 switch (cmd) { 4685 case SIOCGMIIPHY: 4686 data->phy_id = hw->phy_addr; 4687 break; 4688 case SIOCGMIIREG: 4689 spin_lock_irqsave(&adapter->stats_lock, flags); 4690 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F, 4691 &data->val_out)) { 4692 spin_unlock_irqrestore(&adapter->stats_lock, flags); 4693 return -EIO; 4694 } 4695 spin_unlock_irqrestore(&adapter->stats_lock, flags); 4696 break; 4697 case SIOCSMIIREG: 4698 if (data->reg_num & ~(0x1F)) 4699 return -EFAULT; 4700 mii_reg = data->val_in; 4701 spin_lock_irqsave(&adapter->stats_lock, flags); 4702 if (e1000_write_phy_reg(hw, data->reg_num, 4703 mii_reg)) { 4704 spin_unlock_irqrestore(&adapter->stats_lock, flags); 4705 return -EIO; 4706 } 4707 spin_unlock_irqrestore(&adapter->stats_lock, flags); 4708 if (hw->media_type == e1000_media_type_copper) { 4709 switch (data->reg_num) { 4710 case PHY_CTRL: 4711 if (mii_reg & MII_CR_POWER_DOWN) 4712 break; 4713 if (mii_reg & MII_CR_AUTO_NEG_EN) { 4714 hw->autoneg = 1; 4715 hw->autoneg_advertised = 0x2F; 4716 } else { 4717 u32 speed; 4718 if (mii_reg & 0x40) 4719 speed = SPEED_1000; 4720 else if (mii_reg & 0x2000) 4721 speed = SPEED_100; 4722 else 4723 speed = SPEED_10; 4724 retval = e1000_set_spd_dplx( 4725 adapter, speed, 4726 ((mii_reg & 0x100) 4727 ? DUPLEX_FULL : 4728 DUPLEX_HALF)); 4729 if (retval) 4730 return retval; 4731 } 4732 if (netif_running(adapter->netdev)) 4733 e1000_reinit_locked(adapter); 4734 else 4735 e1000_reset(adapter); 4736 break; 4737 case M88E1000_PHY_SPEC_CTRL: 4738 case M88E1000_EXT_PHY_SPEC_CTRL: 4739 if (e1000_phy_reset(hw)) 4740 return -EIO; 4741 break; 4742 } 4743 } else { 4744 switch (data->reg_num) { 4745 case PHY_CTRL: 4746 if (mii_reg & MII_CR_POWER_DOWN) 4747 break; 4748 if (netif_running(adapter->netdev)) 4749 e1000_reinit_locked(adapter); 4750 else 4751 e1000_reset(adapter); 4752 break; 4753 } 4754 } 4755 break; 4756 default: 4757 return -EOPNOTSUPP; 4758 } 4759 return E1000_SUCCESS; 4760 } 4761 4762 void e1000_pci_set_mwi(struct e1000_hw *hw) 4763 { 4764 struct e1000_adapter *adapter = hw->back; 4765 int ret_val = pci_set_mwi(adapter->pdev); 4766 4767 if (ret_val) 4768 e_err(probe, "Error in setting MWI\n"); 4769 } 4770 4771 void e1000_pci_clear_mwi(struct e1000_hw *hw) 4772 { 4773 struct e1000_adapter *adapter = hw->back; 4774 4775 pci_clear_mwi(adapter->pdev); 4776 } 4777 4778 int e1000_pcix_get_mmrbc(struct e1000_hw *hw) 4779 { 4780 struct e1000_adapter *adapter = hw->back; 4781 return pcix_get_mmrbc(adapter->pdev); 4782 } 4783 4784 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc) 4785 { 4786 struct e1000_adapter *adapter = hw->back; 4787 pcix_set_mmrbc(adapter->pdev, mmrbc); 4788 } 4789 4790 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value) 4791 { 4792 outl(value, port); 4793 } 4794 4795 static bool e1000_vlan_used(struct e1000_adapter *adapter) 4796 { 4797 u16 vid; 4798 4799 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 4800 return true; 4801 return false; 4802 } 4803 4804 static void __e1000_vlan_mode(struct e1000_adapter *adapter, 4805 netdev_features_t features) 4806 { 4807 struct e1000_hw *hw = &adapter->hw; 4808 u32 ctrl; 4809 4810 ctrl = er32(CTRL); 4811 if (features & NETIF_F_HW_VLAN_RX) { 4812 /* enable VLAN tag insert/strip */ 4813 ctrl |= E1000_CTRL_VME; 4814 } else { 4815 /* disable VLAN tag insert/strip */ 4816 ctrl &= ~E1000_CTRL_VME; 4817 } 4818 ew32(CTRL, ctrl); 4819 } 4820 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter, 4821 bool filter_on) 4822 { 4823 struct e1000_hw *hw = &adapter->hw; 4824 u32 rctl; 4825 4826 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4827 e1000_irq_disable(adapter); 4828 4829 __e1000_vlan_mode(adapter, adapter->netdev->features); 4830 if (filter_on) { 4831 /* enable VLAN receive filtering */ 4832 rctl = er32(RCTL); 4833 rctl &= ~E1000_RCTL_CFIEN; 4834 if (!(adapter->netdev->flags & IFF_PROMISC)) 4835 rctl |= E1000_RCTL_VFE; 4836 ew32(RCTL, rctl); 4837 e1000_update_mng_vlan(adapter); 4838 } else { 4839 /* disable VLAN receive filtering */ 4840 rctl = er32(RCTL); 4841 rctl &= ~E1000_RCTL_VFE; 4842 ew32(RCTL, rctl); 4843 } 4844 4845 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4846 e1000_irq_enable(adapter); 4847 } 4848 4849 static void e1000_vlan_mode(struct net_device *netdev, 4850 netdev_features_t features) 4851 { 4852 struct e1000_adapter *adapter = netdev_priv(netdev); 4853 4854 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4855 e1000_irq_disable(adapter); 4856 4857 __e1000_vlan_mode(adapter, features); 4858 4859 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4860 e1000_irq_enable(adapter); 4861 } 4862 4863 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 4864 { 4865 struct e1000_adapter *adapter = netdev_priv(netdev); 4866 struct e1000_hw *hw = &adapter->hw; 4867 u32 vfta, index; 4868 4869 if ((hw->mng_cookie.status & 4870 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && 4871 (vid == adapter->mng_vlan_id)) 4872 return 0; 4873 4874 if (!e1000_vlan_used(adapter)) 4875 e1000_vlan_filter_on_off(adapter, true); 4876 4877 /* add VID to filter table */ 4878 index = (vid >> 5) & 0x7F; 4879 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); 4880 vfta |= (1 << (vid & 0x1F)); 4881 e1000_write_vfta(hw, index, vfta); 4882 4883 set_bit(vid, adapter->active_vlans); 4884 4885 return 0; 4886 } 4887 4888 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 4889 { 4890 struct e1000_adapter *adapter = netdev_priv(netdev); 4891 struct e1000_hw *hw = &adapter->hw; 4892 u32 vfta, index; 4893 4894 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4895 e1000_irq_disable(adapter); 4896 if (!test_bit(__E1000_DOWN, &adapter->flags)) 4897 e1000_irq_enable(adapter); 4898 4899 /* remove VID from filter table */ 4900 index = (vid >> 5) & 0x7F; 4901 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); 4902 vfta &= ~(1 << (vid & 0x1F)); 4903 e1000_write_vfta(hw, index, vfta); 4904 4905 clear_bit(vid, adapter->active_vlans); 4906 4907 if (!e1000_vlan_used(adapter)) 4908 e1000_vlan_filter_on_off(adapter, false); 4909 4910 return 0; 4911 } 4912 4913 static void e1000_restore_vlan(struct e1000_adapter *adapter) 4914 { 4915 u16 vid; 4916 4917 if (!e1000_vlan_used(adapter)) 4918 return; 4919 4920 e1000_vlan_filter_on_off(adapter, true); 4921 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) 4922 e1000_vlan_rx_add_vid(adapter->netdev, vid); 4923 } 4924 4925 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx) 4926 { 4927 struct e1000_hw *hw = &adapter->hw; 4928 4929 hw->autoneg = 0; 4930 4931 /* Make sure dplx is at most 1 bit and lsb of speed is not set 4932 * for the switch() below to work */ 4933 if ((spd & 1) || (dplx & ~1)) 4934 goto err_inval; 4935 4936 /* Fiber NICs only allow 1000 gbps Full duplex */ 4937 if ((hw->media_type == e1000_media_type_fiber) && 4938 spd != SPEED_1000 && 4939 dplx != DUPLEX_FULL) 4940 goto err_inval; 4941 4942 switch (spd + dplx) { 4943 case SPEED_10 + DUPLEX_HALF: 4944 hw->forced_speed_duplex = e1000_10_half; 4945 break; 4946 case SPEED_10 + DUPLEX_FULL: 4947 hw->forced_speed_duplex = e1000_10_full; 4948 break; 4949 case SPEED_100 + DUPLEX_HALF: 4950 hw->forced_speed_duplex = e1000_100_half; 4951 break; 4952 case SPEED_100 + DUPLEX_FULL: 4953 hw->forced_speed_duplex = e1000_100_full; 4954 break; 4955 case SPEED_1000 + DUPLEX_FULL: 4956 hw->autoneg = 1; 4957 hw->autoneg_advertised = ADVERTISE_1000_FULL; 4958 break; 4959 case SPEED_1000 + DUPLEX_HALF: /* not supported */ 4960 default: 4961 goto err_inval; 4962 } 4963 4964 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */ 4965 hw->mdix = AUTO_ALL_MODES; 4966 4967 return 0; 4968 4969 err_inval: 4970 e_err(probe, "Unsupported Speed/Duplex configuration\n"); 4971 return -EINVAL; 4972 } 4973 4974 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake) 4975 { 4976 struct net_device *netdev = pci_get_drvdata(pdev); 4977 struct e1000_adapter *adapter = netdev_priv(netdev); 4978 struct e1000_hw *hw = &adapter->hw; 4979 u32 ctrl, ctrl_ext, rctl, status; 4980 u32 wufc = adapter->wol; 4981 #ifdef CONFIG_PM 4982 int retval = 0; 4983 #endif 4984 4985 netif_device_detach(netdev); 4986 4987 if (netif_running(netdev)) { 4988 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); 4989 e1000_down(adapter); 4990 } 4991 4992 #ifdef CONFIG_PM 4993 retval = pci_save_state(pdev); 4994 if (retval) 4995 return retval; 4996 #endif 4997 4998 status = er32(STATUS); 4999 if (status & E1000_STATUS_LU) 5000 wufc &= ~E1000_WUFC_LNKC; 5001 5002 if (wufc) { 5003 e1000_setup_rctl(adapter); 5004 e1000_set_rx_mode(netdev); 5005 5006 rctl = er32(RCTL); 5007 5008 /* turn on all-multi mode if wake on multicast is enabled */ 5009 if (wufc & E1000_WUFC_MC) 5010 rctl |= E1000_RCTL_MPE; 5011 5012 /* enable receives in the hardware */ 5013 ew32(RCTL, rctl | E1000_RCTL_EN); 5014 5015 if (hw->mac_type >= e1000_82540) { 5016 ctrl = er32(CTRL); 5017 /* advertise wake from D3Cold */ 5018 #define E1000_CTRL_ADVD3WUC 0x00100000 5019 /* phy power management enable */ 5020 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000 5021 ctrl |= E1000_CTRL_ADVD3WUC | 5022 E1000_CTRL_EN_PHY_PWR_MGMT; 5023 ew32(CTRL, ctrl); 5024 } 5025 5026 if (hw->media_type == e1000_media_type_fiber || 5027 hw->media_type == e1000_media_type_internal_serdes) { 5028 /* keep the laser running in D3 */ 5029 ctrl_ext = er32(CTRL_EXT); 5030 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA; 5031 ew32(CTRL_EXT, ctrl_ext); 5032 } 5033 5034 ew32(WUC, E1000_WUC_PME_EN); 5035 ew32(WUFC, wufc); 5036 } else { 5037 ew32(WUC, 0); 5038 ew32(WUFC, 0); 5039 } 5040 5041 e1000_release_manageability(adapter); 5042 5043 *enable_wake = !!wufc; 5044 5045 /* make sure adapter isn't asleep if manageability is enabled */ 5046 if (adapter->en_mng_pt) 5047 *enable_wake = true; 5048 5049 if (netif_running(netdev)) 5050 e1000_free_irq(adapter); 5051 5052 pci_disable_device(pdev); 5053 5054 return 0; 5055 } 5056 5057 #ifdef CONFIG_PM 5058 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state) 5059 { 5060 int retval; 5061 bool wake; 5062 5063 retval = __e1000_shutdown(pdev, &wake); 5064 if (retval) 5065 return retval; 5066 5067 if (wake) { 5068 pci_prepare_to_sleep(pdev); 5069 } else { 5070 pci_wake_from_d3(pdev, false); 5071 pci_set_power_state(pdev, PCI_D3hot); 5072 } 5073 5074 return 0; 5075 } 5076 5077 static int e1000_resume(struct pci_dev *pdev) 5078 { 5079 struct net_device *netdev = pci_get_drvdata(pdev); 5080 struct e1000_adapter *adapter = netdev_priv(netdev); 5081 struct e1000_hw *hw = &adapter->hw; 5082 u32 err; 5083 5084 pci_set_power_state(pdev, PCI_D0); 5085 pci_restore_state(pdev); 5086 pci_save_state(pdev); 5087 5088 if (adapter->need_ioport) 5089 err = pci_enable_device(pdev); 5090 else 5091 err = pci_enable_device_mem(pdev); 5092 if (err) { 5093 pr_err("Cannot enable PCI device from suspend\n"); 5094 return err; 5095 } 5096 pci_set_master(pdev); 5097 5098 pci_enable_wake(pdev, PCI_D3hot, 0); 5099 pci_enable_wake(pdev, PCI_D3cold, 0); 5100 5101 if (netif_running(netdev)) { 5102 err = e1000_request_irq(adapter); 5103 if (err) 5104 return err; 5105 } 5106 5107 e1000_power_up_phy(adapter); 5108 e1000_reset(adapter); 5109 ew32(WUS, ~0); 5110 5111 e1000_init_manageability(adapter); 5112 5113 if (netif_running(netdev)) 5114 e1000_up(adapter); 5115 5116 netif_device_attach(netdev); 5117 5118 return 0; 5119 } 5120 #endif 5121 5122 static void e1000_shutdown(struct pci_dev *pdev) 5123 { 5124 bool wake; 5125 5126 __e1000_shutdown(pdev, &wake); 5127 5128 if (system_state == SYSTEM_POWER_OFF) { 5129 pci_wake_from_d3(pdev, wake); 5130 pci_set_power_state(pdev, PCI_D3hot); 5131 } 5132 } 5133 5134 #ifdef CONFIG_NET_POLL_CONTROLLER 5135 /* 5136 * Polling 'interrupt' - used by things like netconsole to send skbs 5137 * without having to re-enable interrupts. It's not called while 5138 * the interrupt routine is executing. 5139 */ 5140 static void e1000_netpoll(struct net_device *netdev) 5141 { 5142 struct e1000_adapter *adapter = netdev_priv(netdev); 5143 5144 disable_irq(adapter->pdev->irq); 5145 e1000_intr(adapter->pdev->irq, netdev); 5146 enable_irq(adapter->pdev->irq); 5147 } 5148 #endif 5149 5150 /** 5151 * e1000_io_error_detected - called when PCI error is detected 5152 * @pdev: Pointer to PCI device 5153 * @state: The current pci connection state 5154 * 5155 * This function is called after a PCI bus error affecting 5156 * this device has been detected. 5157 */ 5158 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, 5159 pci_channel_state_t state) 5160 { 5161 struct net_device *netdev = pci_get_drvdata(pdev); 5162 struct e1000_adapter *adapter = netdev_priv(netdev); 5163 5164 netif_device_detach(netdev); 5165 5166 if (state == pci_channel_io_perm_failure) 5167 return PCI_ERS_RESULT_DISCONNECT; 5168 5169 if (netif_running(netdev)) 5170 e1000_down(adapter); 5171 pci_disable_device(pdev); 5172 5173 /* Request a slot slot reset. */ 5174 return PCI_ERS_RESULT_NEED_RESET; 5175 } 5176 5177 /** 5178 * e1000_io_slot_reset - called after the pci bus has been reset. 5179 * @pdev: Pointer to PCI device 5180 * 5181 * Restart the card from scratch, as if from a cold-boot. Implementation 5182 * resembles the first-half of the e1000_resume routine. 5183 */ 5184 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) 5185 { 5186 struct net_device *netdev = pci_get_drvdata(pdev); 5187 struct e1000_adapter *adapter = netdev_priv(netdev); 5188 struct e1000_hw *hw = &adapter->hw; 5189 int err; 5190 5191 if (adapter->need_ioport) 5192 err = pci_enable_device(pdev); 5193 else 5194 err = pci_enable_device_mem(pdev); 5195 if (err) { 5196 pr_err("Cannot re-enable PCI device after reset.\n"); 5197 return PCI_ERS_RESULT_DISCONNECT; 5198 } 5199 pci_set_master(pdev); 5200 5201 pci_enable_wake(pdev, PCI_D3hot, 0); 5202 pci_enable_wake(pdev, PCI_D3cold, 0); 5203 5204 e1000_reset(adapter); 5205 ew32(WUS, ~0); 5206 5207 return PCI_ERS_RESULT_RECOVERED; 5208 } 5209 5210 /** 5211 * e1000_io_resume - called when traffic can start flowing again. 5212 * @pdev: Pointer to PCI device 5213 * 5214 * This callback is called when the error recovery driver tells us that 5215 * its OK to resume normal operation. Implementation resembles the 5216 * second-half of the e1000_resume routine. 5217 */ 5218 static void e1000_io_resume(struct pci_dev *pdev) 5219 { 5220 struct net_device *netdev = pci_get_drvdata(pdev); 5221 struct e1000_adapter *adapter = netdev_priv(netdev); 5222 5223 e1000_init_manageability(adapter); 5224 5225 if (netif_running(netdev)) { 5226 if (e1000_up(adapter)) { 5227 pr_info("can't bring device back up after reset\n"); 5228 return; 5229 } 5230 } 5231 5232 netif_device_attach(netdev); 5233 } 5234 5235 /* e1000_main.c */ 5236