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