1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
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.
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
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.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
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
27 *******************************************************************************/
30 #include <net/ip6_checksum.h>
32 #include <linux/prefetch.h>
33 #include <linux/bitops.h>
34 #include <linux/if_vlan.h>
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.";
42 /* e1000_pci_tbl - PCI Device ID Table
44 * Last entry must be all 0s
47 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
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 */
91 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
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);
111 static int e1000_init_module(void);
112 static void e1000_exit_module(void);
113 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
114 static void e1000_remove(struct pci_dev *pdev);
115 static int e1000_alloc_queues(struct e1000_adapter *adapter);
116 static int e1000_sw_init(struct e1000_adapter *adapter);
117 static int e1000_open(struct net_device *netdev);
118 static int e1000_close(struct net_device *netdev);
119 static void e1000_configure_tx(struct e1000_adapter *adapter);
120 static void e1000_configure_rx(struct e1000_adapter *adapter);
121 static void e1000_setup_rctl(struct e1000_adapter *adapter);
122 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
123 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
124 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
125 struct e1000_tx_ring *tx_ring);
126 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
127 struct e1000_rx_ring *rx_ring);
128 static void e1000_set_rx_mode(struct net_device *netdev);
129 static void e1000_update_phy_info_task(struct work_struct *work);
130 static void e1000_watchdog(struct work_struct *work);
131 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
132 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
133 struct net_device *netdev);
134 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
135 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
136 static int e1000_set_mac(struct net_device *netdev, void *p);
137 static irqreturn_t e1000_intr(int irq, void *data);
138 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
139 struct e1000_tx_ring *tx_ring);
140 static int e1000_clean(struct napi_struct *napi, int budget);
141 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
142 struct e1000_rx_ring *rx_ring,
143 int *work_done, int work_to_do);
144 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
145 struct e1000_rx_ring *rx_ring,
146 int *work_done, int work_to_do);
147 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
148 struct e1000_rx_ring *rx_ring,
150 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
151 struct e1000_rx_ring *rx_ring,
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,
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);
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,
169 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
170 __be16 proto, u16 vid);
171 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
172 __be16 proto, u16 vid);
173 static void e1000_restore_vlan(struct e1000_adapter *adapter);
176 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
177 static int e1000_resume(struct pci_dev *pdev);
179 static void e1000_shutdown(struct pci_dev *pdev);
181 #ifdef CONFIG_NET_POLL_CONTROLLER
182 /* for netdump / net console */
183 static void e1000_netpoll (struct net_device *netdev);
186 #define COPYBREAK_DEFAULT 256
187 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
188 module_param(copybreak, uint, 0644);
189 MODULE_PARM_DESC(copybreak,
190 "Maximum size of packet that is copied to a new buffer on receive");
192 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
193 pci_channel_state_t state);
194 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
195 static void e1000_io_resume(struct pci_dev *pdev);
197 static const struct pci_error_handlers e1000_err_handler = {
198 .error_detected = e1000_io_error_detected,
199 .slot_reset = e1000_io_slot_reset,
200 .resume = e1000_io_resume,
203 static struct pci_driver e1000_driver = {
204 .name = e1000_driver_name,
205 .id_table = e1000_pci_tbl,
206 .probe = e1000_probe,
207 .remove = e1000_remove,
209 /* Power Management Hooks */
210 .suspend = e1000_suspend,
211 .resume = e1000_resume,
213 .shutdown = e1000_shutdown,
214 .err_handler = &e1000_err_handler
217 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
218 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
219 MODULE_LICENSE("GPL");
220 MODULE_VERSION(DRV_VERSION);
222 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
223 static int debug = -1;
224 module_param(debug, int, 0);
225 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
228 * e1000_get_hw_dev - return device
229 * used by hardware layer to print debugging information
232 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
234 struct e1000_adapter *adapter = hw->back;
235 return adapter->netdev;
239 * e1000_init_module - Driver Registration Routine
241 * e1000_init_module is the first routine called when the driver is
242 * loaded. All it does is register with the PCI subsystem.
244 static int __init e1000_init_module(void)
247 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
249 pr_info("%s\n", e1000_copyright);
251 ret = pci_register_driver(&e1000_driver);
252 if (copybreak != COPYBREAK_DEFAULT) {
254 pr_info("copybreak disabled\n");
256 pr_info("copybreak enabled for "
257 "packets <= %u bytes\n", copybreak);
262 module_init(e1000_init_module);
265 * e1000_exit_module - Driver Exit Cleanup Routine
267 * e1000_exit_module is called just before the driver is removed
270 static void __exit e1000_exit_module(void)
272 pci_unregister_driver(&e1000_driver);
275 module_exit(e1000_exit_module);
277 static int e1000_request_irq(struct e1000_adapter *adapter)
279 struct net_device *netdev = adapter->netdev;
280 irq_handler_t handler = e1000_intr;
281 int irq_flags = IRQF_SHARED;
284 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
287 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
293 static void e1000_free_irq(struct e1000_adapter *adapter)
295 struct net_device *netdev = adapter->netdev;
297 free_irq(adapter->pdev->irq, netdev);
301 * e1000_irq_disable - Mask off interrupt generation on the NIC
302 * @adapter: board private structure
304 static void e1000_irq_disable(struct e1000_adapter *adapter)
306 struct e1000_hw *hw = &adapter->hw;
310 synchronize_irq(adapter->pdev->irq);
314 * e1000_irq_enable - Enable default interrupt generation settings
315 * @adapter: board private structure
317 static void e1000_irq_enable(struct e1000_adapter *adapter)
319 struct e1000_hw *hw = &adapter->hw;
321 ew32(IMS, IMS_ENABLE_MASK);
325 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
327 struct e1000_hw *hw = &adapter->hw;
328 struct net_device *netdev = adapter->netdev;
329 u16 vid = hw->mng_cookie.vlan_id;
330 u16 old_vid = adapter->mng_vlan_id;
332 if (!e1000_vlan_used(adapter))
335 if (!test_bit(vid, adapter->active_vlans)) {
336 if (hw->mng_cookie.status &
337 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
338 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
339 adapter->mng_vlan_id = vid;
341 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
343 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
345 !test_bit(old_vid, adapter->active_vlans))
346 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
349 adapter->mng_vlan_id = vid;
353 static void e1000_init_manageability(struct e1000_adapter *adapter)
355 struct e1000_hw *hw = &adapter->hw;
357 if (adapter->en_mng_pt) {
358 u32 manc = er32(MANC);
360 /* disable hardware interception of ARP */
361 manc &= ~(E1000_MANC_ARP_EN);
367 static void e1000_release_manageability(struct e1000_adapter *adapter)
369 struct e1000_hw *hw = &adapter->hw;
371 if (adapter->en_mng_pt) {
372 u32 manc = er32(MANC);
374 /* re-enable hardware interception of ARP */
375 manc |= E1000_MANC_ARP_EN;
382 * e1000_configure - configure the hardware for RX and TX
383 * @adapter = private board structure
385 static void e1000_configure(struct e1000_adapter *adapter)
387 struct net_device *netdev = adapter->netdev;
390 e1000_set_rx_mode(netdev);
392 e1000_restore_vlan(adapter);
393 e1000_init_manageability(adapter);
395 e1000_configure_tx(adapter);
396 e1000_setup_rctl(adapter);
397 e1000_configure_rx(adapter);
398 /* call E1000_DESC_UNUSED which always leaves
399 * at least 1 descriptor unused to make sure
400 * 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));
409 int e1000_up(struct e1000_adapter *adapter)
411 struct e1000_hw *hw = &adapter->hw;
413 /* hardware has been reset, we need to reload some things */
414 e1000_configure(adapter);
416 clear_bit(__E1000_DOWN, &adapter->flags);
418 napi_enable(&adapter->napi);
420 e1000_irq_enable(adapter);
422 netif_wake_queue(adapter->netdev);
424 /* fire a link change interrupt to start the watchdog */
425 ew32(ICS, E1000_ICS_LSC);
430 * e1000_power_up_phy - restore link in case the phy was powered down
431 * @adapter: address of board private structure
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 ***
437 void e1000_power_up_phy(struct e1000_adapter *adapter)
439 struct e1000_hw *hw = &adapter->hw;
442 /* Just clear the power down bit to wake the phy back up */
443 if (hw->media_type == e1000_media_type_copper) {
444 /* according to the manual, the phy will retain its
445 * settings across a power-down/up cycle
447 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
448 mii_reg &= ~MII_CR_POWER_DOWN;
449 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
453 static void e1000_power_down_phy(struct e1000_adapter *adapter)
455 struct e1000_hw *hw = &adapter->hw;
457 /* Power down the PHY so no link is implied when interface is down *
458 * The PHY cannot be powered down if any of the following is true *
461 * (c) SoL/IDER session is active
463 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
464 hw->media_type == e1000_media_type_copper) {
467 switch (hw->mac_type) {
470 case e1000_82545_rev_3:
473 case e1000_82546_rev_3:
475 case e1000_82541_rev_2:
477 case e1000_82547_rev_2:
478 if (er32(MANC) & E1000_MANC_SMBUS_EN)
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);
493 static void e1000_down_and_stop(struct e1000_adapter *adapter)
495 set_bit(__E1000_DOWN, &adapter->flags);
497 cancel_delayed_work_sync(&adapter->watchdog_task);
500 * Since the watchdog task can reschedule other tasks, we should cancel
501 * it first, otherwise we can run into the situation when a work is
502 * still running after the adapter has been turned down.
505 cancel_delayed_work_sync(&adapter->phy_info_task);
506 cancel_delayed_work_sync(&adapter->fifo_stall_task);
508 /* Only kill reset task if adapter is not resetting */
509 if (!test_bit(__E1000_RESETTING, &adapter->flags))
510 cancel_work_sync(&adapter->reset_task);
513 void e1000_down(struct e1000_adapter *adapter)
515 struct e1000_hw *hw = &adapter->hw;
516 struct net_device *netdev = adapter->netdev;
520 /* disable receives in the hardware */
522 ew32(RCTL, rctl & ~E1000_RCTL_EN);
523 /* flush and sleep below */
525 netif_tx_disable(netdev);
527 /* disable transmits in the hardware */
529 tctl &= ~E1000_TCTL_EN;
531 /* flush both disables and wait for them to finish */
535 napi_disable(&adapter->napi);
537 e1000_irq_disable(adapter);
539 /* Setting DOWN must be after irq_disable to prevent
540 * a screaming interrupt. Setting DOWN also prevents
541 * tasks from rescheduling.
543 e1000_down_and_stop(adapter);
545 adapter->link_speed = 0;
546 adapter->link_duplex = 0;
547 netif_carrier_off(netdev);
549 e1000_reset(adapter);
550 e1000_clean_all_tx_rings(adapter);
551 e1000_clean_all_rx_rings(adapter);
554 void e1000_reinit_locked(struct e1000_adapter *adapter)
556 WARN_ON(in_interrupt());
557 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
561 clear_bit(__E1000_RESETTING, &adapter->flags);
564 void e1000_reset(struct e1000_adapter *adapter)
566 struct e1000_hw *hw = &adapter->hw;
567 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
568 bool legacy_pba_adjust = false;
571 /* Repartition Pba for greater than 9k mtu
572 * To take effect CTRL.RST is required.
575 switch (hw->mac_type) {
576 case e1000_82542_rev2_0:
577 case e1000_82542_rev2_1:
582 case e1000_82541_rev_2:
583 legacy_pba_adjust = true;
587 case e1000_82545_rev_3:
590 case e1000_82546_rev_3:
594 case e1000_82547_rev_2:
595 legacy_pba_adjust = true;
598 case e1000_undefined:
603 if (legacy_pba_adjust) {
604 if (hw->max_frame_size > E1000_RXBUFFER_8192)
605 pba -= 8; /* allocate more FIFO for Tx */
607 if (hw->mac_type == e1000_82547) {
608 adapter->tx_fifo_head = 0;
609 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
610 adapter->tx_fifo_size =
611 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
612 atomic_set(&adapter->tx_fifo_stall, 0);
614 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
615 /* adjust PBA for jumbo frames */
618 /* To maintain wire speed transmits, the Tx FIFO should be
619 * large enough to accommodate two full transmit packets,
620 * rounded up to the next 1KB and expressed in KB. Likewise,
621 * the Rx FIFO should be large enough to accommodate at least
622 * one full receive packet and is similarly rounded up and
626 /* upper 16 bits has Tx packet buffer allocation size in KB */
627 tx_space = pba >> 16;
628 /* lower 16 bits has Rx packet buffer allocation size in KB */
630 /* the Tx fifo also stores 16 bytes of information about the Tx
631 * but don't include ethernet FCS because hardware appends it
633 min_tx_space = (hw->max_frame_size +
634 sizeof(struct e1000_tx_desc) -
636 min_tx_space = ALIGN(min_tx_space, 1024);
638 /* software strips receive CRC, so leave room for it */
639 min_rx_space = hw->max_frame_size;
640 min_rx_space = ALIGN(min_rx_space, 1024);
643 /* If current Tx allocation is less than the min Tx FIFO size,
644 * and the min Tx FIFO size is less than the current Rx FIFO
645 * allocation, take space away from current Rx allocation
647 if (tx_space < min_tx_space &&
648 ((min_tx_space - tx_space) < pba)) {
649 pba = pba - (min_tx_space - tx_space);
651 /* PCI/PCIx hardware has PBA alignment constraints */
652 switch (hw->mac_type) {
653 case e1000_82545 ... e1000_82546_rev_3:
654 pba &= ~(E1000_PBA_8K - 1);
660 /* if short on Rx space, Rx wins and must trump Tx
661 * adjustment or use Early Receive if available
663 if (pba < min_rx_space)
670 /* flow control settings:
671 * The high water mark must be low enough to fit one full frame
672 * (or the size used for early receive) above it in the Rx FIFO.
673 * Set it to the lower of:
674 * - 90% of the Rx FIFO size, and
675 * - the full Rx FIFO size minus the early receive size (for parts
676 * with ERT support assuming ERT set to E1000_ERT_2048), or
677 * - the full Rx FIFO size minus one full frame
679 hwm = min(((pba << 10) * 9 / 10),
680 ((pba << 10) - hw->max_frame_size));
682 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
683 hw->fc_low_water = hw->fc_high_water - 8;
684 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
686 hw->fc = hw->original_fc;
688 /* Allow time for pending master requests to run */
690 if (hw->mac_type >= e1000_82544)
693 if (e1000_init_hw(hw))
694 e_dev_err("Hardware Error\n");
695 e1000_update_mng_vlan(adapter);
697 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
698 if (hw->mac_type >= e1000_82544 &&
700 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
701 u32 ctrl = er32(CTRL);
702 /* clear phy power management bit if we are in gig only mode,
703 * which if enabled will attempt negotiation to 100Mb, which
704 * can cause a loss of link at power off or driver unload
706 ctrl &= ~E1000_CTRL_SWDPIN3;
710 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
711 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
713 e1000_reset_adaptive(hw);
714 e1000_phy_get_info(hw, &adapter->phy_info);
716 e1000_release_manageability(adapter);
719 /* Dump the eeprom for users having checksum issues */
720 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
722 struct net_device *netdev = adapter->netdev;
723 struct ethtool_eeprom eeprom;
724 const struct ethtool_ops *ops = netdev->ethtool_ops;
727 u16 csum_old, csum_new = 0;
729 eeprom.len = ops->get_eeprom_len(netdev);
732 data = kmalloc(eeprom.len, GFP_KERNEL);
736 ops->get_eeprom(netdev, &eeprom, data);
738 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
739 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
740 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
741 csum_new += data[i] + (data[i + 1] << 8);
742 csum_new = EEPROM_SUM - csum_new;
744 pr_err("/*********************/\n");
745 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
746 pr_err("Calculated : 0x%04x\n", csum_new);
748 pr_err("Offset Values\n");
749 pr_err("======== ======\n");
750 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
752 pr_err("Include this output when contacting your support provider.\n");
753 pr_err("This is not a software error! Something bad happened to\n");
754 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
755 pr_err("result in further problems, possibly loss of data,\n");
756 pr_err("corruption or system hangs!\n");
757 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
758 pr_err("which is invalid and requires you to set the proper MAC\n");
759 pr_err("address manually before continuing to enable this network\n");
760 pr_err("device. Please inspect the EEPROM dump and report the\n");
761 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
762 pr_err("/*********************/\n");
768 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
769 * @pdev: PCI device information struct
771 * Return true if an adapter needs ioport resources
773 static int e1000_is_need_ioport(struct pci_dev *pdev)
775 switch (pdev->device) {
776 case E1000_DEV_ID_82540EM:
777 case E1000_DEV_ID_82540EM_LOM:
778 case E1000_DEV_ID_82540EP:
779 case E1000_DEV_ID_82540EP_LOM:
780 case E1000_DEV_ID_82540EP_LP:
781 case E1000_DEV_ID_82541EI:
782 case E1000_DEV_ID_82541EI_MOBILE:
783 case E1000_DEV_ID_82541ER:
784 case E1000_DEV_ID_82541ER_LOM:
785 case E1000_DEV_ID_82541GI:
786 case E1000_DEV_ID_82541GI_LF:
787 case E1000_DEV_ID_82541GI_MOBILE:
788 case E1000_DEV_ID_82544EI_COPPER:
789 case E1000_DEV_ID_82544EI_FIBER:
790 case E1000_DEV_ID_82544GC_COPPER:
791 case E1000_DEV_ID_82544GC_LOM:
792 case E1000_DEV_ID_82545EM_COPPER:
793 case E1000_DEV_ID_82545EM_FIBER:
794 case E1000_DEV_ID_82546EB_COPPER:
795 case E1000_DEV_ID_82546EB_FIBER:
796 case E1000_DEV_ID_82546EB_QUAD_COPPER:
803 static netdev_features_t e1000_fix_features(struct net_device *netdev,
804 netdev_features_t features)
806 /* Since there is no support for separate Rx/Tx vlan accel
807 * enable/disable make sure Tx flag is always in same state as Rx.
809 if (features & NETIF_F_HW_VLAN_CTAG_RX)
810 features |= NETIF_F_HW_VLAN_CTAG_TX;
812 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
817 static int e1000_set_features(struct net_device *netdev,
818 netdev_features_t features)
820 struct e1000_adapter *adapter = netdev_priv(netdev);
821 netdev_features_t changed = features ^ netdev->features;
823 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
824 e1000_vlan_mode(netdev, features);
826 if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL)))
829 netdev->features = features;
830 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
832 if (netif_running(netdev))
833 e1000_reinit_locked(adapter);
835 e1000_reset(adapter);
840 static const struct net_device_ops e1000_netdev_ops = {
841 .ndo_open = e1000_open,
842 .ndo_stop = e1000_close,
843 .ndo_start_xmit = e1000_xmit_frame,
844 .ndo_get_stats = e1000_get_stats,
845 .ndo_set_rx_mode = e1000_set_rx_mode,
846 .ndo_set_mac_address = e1000_set_mac,
847 .ndo_tx_timeout = e1000_tx_timeout,
848 .ndo_change_mtu = e1000_change_mtu,
849 .ndo_do_ioctl = e1000_ioctl,
850 .ndo_validate_addr = eth_validate_addr,
851 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
852 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
853 #ifdef CONFIG_NET_POLL_CONTROLLER
854 .ndo_poll_controller = e1000_netpoll,
856 .ndo_fix_features = e1000_fix_features,
857 .ndo_set_features = e1000_set_features,
861 * e1000_init_hw_struct - initialize members of hw struct
862 * @adapter: board private struct
863 * @hw: structure used by e1000_hw.c
865 * Factors out initialization of the e1000_hw struct to its own function
866 * that can be called very early at init (just after struct allocation).
867 * Fields are initialized based on PCI device information and
868 * OS network device settings (MTU size).
869 * Returns negative error codes if MAC type setup fails.
871 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
874 struct pci_dev *pdev = adapter->pdev;
876 /* PCI config space info */
877 hw->vendor_id = pdev->vendor;
878 hw->device_id = pdev->device;
879 hw->subsystem_vendor_id = pdev->subsystem_vendor;
880 hw->subsystem_id = pdev->subsystem_device;
881 hw->revision_id = pdev->revision;
883 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
885 hw->max_frame_size = adapter->netdev->mtu +
886 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
887 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
889 /* identify the MAC */
890 if (e1000_set_mac_type(hw)) {
891 e_err(probe, "Unknown MAC Type\n");
895 switch (hw->mac_type) {
900 case e1000_82541_rev_2:
901 case e1000_82547_rev_2:
902 hw->phy_init_script = 1;
906 e1000_set_media_type(hw);
907 e1000_get_bus_info(hw);
909 hw->wait_autoneg_complete = false;
910 hw->tbi_compatibility_en = true;
911 hw->adaptive_ifs = true;
915 if (hw->media_type == e1000_media_type_copper) {
916 hw->mdix = AUTO_ALL_MODES;
917 hw->disable_polarity_correction = false;
918 hw->master_slave = E1000_MASTER_SLAVE;
925 * e1000_probe - Device Initialization Routine
926 * @pdev: PCI device information struct
927 * @ent: entry in e1000_pci_tbl
929 * Returns 0 on success, negative on failure
931 * e1000_probe initializes an adapter identified by a pci_dev structure.
932 * The OS initialization, configuring of the adapter private structure,
933 * and a hardware reset occur.
935 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
937 struct net_device *netdev;
938 struct e1000_adapter *adapter;
941 static int cards_found = 0;
942 static int global_quad_port_a = 0; /* global ksp3 port a indication */
943 int i, err, pci_using_dac;
946 u16 eeprom_apme_mask = E1000_EEPROM_APME;
947 int bars, need_ioport;
949 /* do not allocate ioport bars when not needed */
950 need_ioport = e1000_is_need_ioport(pdev);
952 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
953 err = pci_enable_device(pdev);
955 bars = pci_select_bars(pdev, IORESOURCE_MEM);
956 err = pci_enable_device_mem(pdev);
961 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
965 pci_set_master(pdev);
966 err = pci_save_state(pdev);
968 goto err_alloc_etherdev;
971 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
973 goto err_alloc_etherdev;
975 SET_NETDEV_DEV(netdev, &pdev->dev);
977 pci_set_drvdata(pdev, netdev);
978 adapter = netdev_priv(netdev);
979 adapter->netdev = netdev;
980 adapter->pdev = pdev;
981 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
982 adapter->bars = bars;
983 adapter->need_ioport = need_ioport;
989 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
993 if (adapter->need_ioport) {
994 for (i = BAR_1; i <= BAR_5; i++) {
995 if (pci_resource_len(pdev, i) == 0)
997 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
998 hw->io_base = pci_resource_start(pdev, i);
1004 /* make ready for any if (hw->...) below */
1005 err = e1000_init_hw_struct(adapter, hw);
1009 /* there is a workaround being applied below that limits
1010 * 64-bit DMA addresses to 64-bit hardware. There are some
1011 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1014 if ((hw->bus_type == e1000_bus_type_pcix) &&
1015 !dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
1018 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1020 pr_err("No usable DMA config, aborting\n");
1025 netdev->netdev_ops = &e1000_netdev_ops;
1026 e1000_set_ethtool_ops(netdev);
1027 netdev->watchdog_timeo = 5 * HZ;
1028 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1030 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1032 adapter->bd_number = cards_found;
1034 /* setup the private structure */
1036 err = e1000_sw_init(adapter);
1041 if (hw->mac_type == e1000_ce4100) {
1042 hw->ce4100_gbe_mdio_base_virt =
1043 ioremap(pci_resource_start(pdev, BAR_1),
1044 pci_resource_len(pdev, BAR_1));
1046 if (!hw->ce4100_gbe_mdio_base_virt)
1047 goto err_mdio_ioremap;
1050 if (hw->mac_type >= e1000_82543) {
1051 netdev->hw_features = NETIF_F_SG |
1053 NETIF_F_HW_VLAN_CTAG_RX;
1054 netdev->features = NETIF_F_HW_VLAN_CTAG_TX |
1055 NETIF_F_HW_VLAN_CTAG_FILTER;
1058 if ((hw->mac_type >= e1000_82544) &&
1059 (hw->mac_type != e1000_82547))
1060 netdev->hw_features |= NETIF_F_TSO;
1062 netdev->priv_flags |= IFF_SUPP_NOFCS;
1064 netdev->features |= netdev->hw_features;
1065 netdev->hw_features |= (NETIF_F_RXCSUM |
1069 if (pci_using_dac) {
1070 netdev->features |= NETIF_F_HIGHDMA;
1071 netdev->vlan_features |= NETIF_F_HIGHDMA;
1074 netdev->vlan_features |= (NETIF_F_TSO |
1078 netdev->priv_flags |= IFF_UNICAST_FLT;
1080 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1082 /* initialize eeprom parameters */
1083 if (e1000_init_eeprom_params(hw)) {
1084 e_err(probe, "EEPROM initialization failed\n");
1088 /* before reading the EEPROM, reset the controller to
1089 * put the device in a known good starting state
1094 /* make sure the EEPROM is good */
1095 if (e1000_validate_eeprom_checksum(hw) < 0) {
1096 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1097 e1000_dump_eeprom(adapter);
1098 /* set MAC address to all zeroes to invalidate and temporary
1099 * disable this device for the user. This blocks regular
1100 * traffic while still permitting ethtool ioctls from reaching
1101 * the hardware as well as allowing the user to run the
1102 * interface after manually setting a hw addr using
1105 memset(hw->mac_addr, 0, netdev->addr_len);
1107 /* copy the MAC address out of the EEPROM */
1108 if (e1000_read_mac_addr(hw))
1109 e_err(probe, "EEPROM Read Error\n");
1111 /* don't block initalization here due to bad MAC address */
1112 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1114 if (!is_valid_ether_addr(netdev->dev_addr))
1115 e_err(probe, "Invalid MAC Address\n");
1118 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1119 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1120 e1000_82547_tx_fifo_stall_task);
1121 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1122 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1124 e1000_check_options(adapter);
1126 /* Initial Wake on LAN setting
1127 * If APM wake is enabled in the EEPROM,
1128 * enable the ACPI Magic Packet filter
1131 switch (hw->mac_type) {
1132 case e1000_82542_rev2_0:
1133 case e1000_82542_rev2_1:
1137 e1000_read_eeprom(hw,
1138 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1139 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1142 case e1000_82546_rev_3:
1143 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1144 e1000_read_eeprom(hw,
1145 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1150 e1000_read_eeprom(hw,
1151 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1154 if (eeprom_data & eeprom_apme_mask)
1155 adapter->eeprom_wol |= E1000_WUFC_MAG;
1157 /* now that we have the eeprom settings, apply the special cases
1158 * where the eeprom may be wrong or the board simply won't support
1159 * wake on lan on a particular port
1161 switch (pdev->device) {
1162 case E1000_DEV_ID_82546GB_PCIE:
1163 adapter->eeprom_wol = 0;
1165 case E1000_DEV_ID_82546EB_FIBER:
1166 case E1000_DEV_ID_82546GB_FIBER:
1167 /* Wake events only supported on port A for dual fiber
1168 * regardless of eeprom setting
1170 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1171 adapter->eeprom_wol = 0;
1173 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1174 /* if quad port adapter, disable WoL on all but port A */
1175 if (global_quad_port_a != 0)
1176 adapter->eeprom_wol = 0;
1178 adapter->quad_port_a = true;
1179 /* Reset for multiple quad port adapters */
1180 if (++global_quad_port_a == 4)
1181 global_quad_port_a = 0;
1185 /* initialize the wol settings based on the eeprom settings */
1186 adapter->wol = adapter->eeprom_wol;
1187 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1189 /* Auto detect PHY address */
1190 if (hw->mac_type == e1000_ce4100) {
1191 for (i = 0; i < 32; i++) {
1193 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1194 if (tmp == 0 || tmp == 0xFF) {
1203 /* reset the hardware with the new settings */
1204 e1000_reset(adapter);
1206 strcpy(netdev->name, "eth%d");
1207 err = register_netdev(netdev);
1211 e1000_vlan_filter_on_off(adapter, false);
1213 /* print bus type/speed/width info */
1214 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1215 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1216 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1217 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1218 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1219 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1220 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1223 /* carrier off reporting is important to ethtool even BEFORE open */
1224 netif_carrier_off(netdev);
1226 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1233 e1000_phy_hw_reset(hw);
1235 if (hw->flash_address)
1236 iounmap(hw->flash_address);
1237 kfree(adapter->tx_ring);
1238 kfree(adapter->rx_ring);
1242 iounmap(hw->ce4100_gbe_mdio_base_virt);
1243 iounmap(hw->hw_addr);
1245 free_netdev(netdev);
1247 pci_release_selected_regions(pdev, bars);
1249 pci_disable_device(pdev);
1254 * e1000_remove - Device Removal Routine
1255 * @pdev: PCI device information struct
1257 * e1000_remove is called by the PCI subsystem to alert the driver
1258 * that it should release a PCI device. The could be caused by a
1259 * Hot-Plug event, or because the driver is going to be removed from
1262 static void e1000_remove(struct pci_dev *pdev)
1264 struct net_device *netdev = pci_get_drvdata(pdev);
1265 struct e1000_adapter *adapter = netdev_priv(netdev);
1266 struct e1000_hw *hw = &adapter->hw;
1268 e1000_down_and_stop(adapter);
1269 e1000_release_manageability(adapter);
1271 unregister_netdev(netdev);
1273 e1000_phy_hw_reset(hw);
1275 kfree(adapter->tx_ring);
1276 kfree(adapter->rx_ring);
1278 if (hw->mac_type == e1000_ce4100)
1279 iounmap(hw->ce4100_gbe_mdio_base_virt);
1280 iounmap(hw->hw_addr);
1281 if (hw->flash_address)
1282 iounmap(hw->flash_address);
1283 pci_release_selected_regions(pdev, adapter->bars);
1285 free_netdev(netdev);
1287 pci_disable_device(pdev);
1291 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1292 * @adapter: board private structure to initialize
1294 * e1000_sw_init initializes the Adapter private data structure.
1295 * e1000_init_hw_struct MUST be called before this function
1297 static int e1000_sw_init(struct e1000_adapter *adapter)
1299 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1301 adapter->num_tx_queues = 1;
1302 adapter->num_rx_queues = 1;
1304 if (e1000_alloc_queues(adapter)) {
1305 e_err(probe, "Unable to allocate memory for queues\n");
1309 /* Explicitly disable IRQ since the NIC can be in any state. */
1310 e1000_irq_disable(adapter);
1312 spin_lock_init(&adapter->stats_lock);
1314 set_bit(__E1000_DOWN, &adapter->flags);
1320 * e1000_alloc_queues - Allocate memory for all rings
1321 * @adapter: board private structure to initialize
1323 * We allocate one ring per queue at run-time since we don't know the
1324 * number of queues at compile-time.
1326 static int e1000_alloc_queues(struct e1000_adapter *adapter)
1328 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1329 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1330 if (!adapter->tx_ring)
1333 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1334 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1335 if (!adapter->rx_ring) {
1336 kfree(adapter->tx_ring);
1340 return E1000_SUCCESS;
1344 * e1000_open - Called when a network interface is made active
1345 * @netdev: network interface device structure
1347 * Returns 0 on success, negative value on failure
1349 * The open entry point is called when a network interface is made
1350 * active by the system (IFF_UP). At this point all resources needed
1351 * for transmit and receive operations are allocated, the interrupt
1352 * handler is registered with the OS, the watchdog task is started,
1353 * and the stack is notified that the interface is ready.
1355 static int e1000_open(struct net_device *netdev)
1357 struct e1000_adapter *adapter = netdev_priv(netdev);
1358 struct e1000_hw *hw = &adapter->hw;
1361 /* disallow open during test */
1362 if (test_bit(__E1000_TESTING, &adapter->flags))
1365 netif_carrier_off(netdev);
1367 /* allocate transmit descriptors */
1368 err = e1000_setup_all_tx_resources(adapter);
1372 /* allocate receive descriptors */
1373 err = e1000_setup_all_rx_resources(adapter);
1377 e1000_power_up_phy(adapter);
1379 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1380 if ((hw->mng_cookie.status &
1381 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1382 e1000_update_mng_vlan(adapter);
1385 /* before we allocate an interrupt, we must be ready to handle it.
1386 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1387 * as soon as we call pci_request_irq, so we have to setup our
1388 * clean_rx handler before we do so.
1390 e1000_configure(adapter);
1392 err = e1000_request_irq(adapter);
1396 /* From here on the code is the same as e1000_up() */
1397 clear_bit(__E1000_DOWN, &adapter->flags);
1399 napi_enable(&adapter->napi);
1401 e1000_irq_enable(adapter);
1403 netif_start_queue(netdev);
1405 /* fire a link status change interrupt to start the watchdog */
1406 ew32(ICS, E1000_ICS_LSC);
1408 return E1000_SUCCESS;
1411 e1000_power_down_phy(adapter);
1412 e1000_free_all_rx_resources(adapter);
1414 e1000_free_all_tx_resources(adapter);
1416 e1000_reset(adapter);
1422 * e1000_close - Disables a network interface
1423 * @netdev: network interface device structure
1425 * Returns 0, this is not allowed to fail
1427 * The close entry point is called when an interface is de-activated
1428 * by the OS. The hardware is still under the drivers control, but
1429 * needs to be disabled. A global MAC reset is issued to stop the
1430 * hardware, and all transmit and receive resources are freed.
1432 static int e1000_close(struct net_device *netdev)
1434 struct e1000_adapter *adapter = netdev_priv(netdev);
1435 struct e1000_hw *hw = &adapter->hw;
1436 int count = E1000_CHECK_RESET_COUNT;
1438 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
1439 usleep_range(10000, 20000);
1441 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1442 e1000_down(adapter);
1443 e1000_power_down_phy(adapter);
1444 e1000_free_irq(adapter);
1446 e1000_free_all_tx_resources(adapter);
1447 e1000_free_all_rx_resources(adapter);
1449 /* kill manageability vlan ID if supported, but not if a vlan with
1450 * the same ID is registered on the host OS (let 8021q kill it)
1452 if ((hw->mng_cookie.status &
1453 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1454 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1455 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
1456 adapter->mng_vlan_id);
1463 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1464 * @adapter: address of board private structure
1465 * @start: address of beginning of memory
1466 * @len: length of memory
1468 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1471 struct e1000_hw *hw = &adapter->hw;
1472 unsigned long begin = (unsigned long)start;
1473 unsigned long end = begin + len;
1475 /* First rev 82545 and 82546 need to not allow any memory
1476 * write location to cross 64k boundary due to errata 23
1478 if (hw->mac_type == e1000_82545 ||
1479 hw->mac_type == e1000_ce4100 ||
1480 hw->mac_type == e1000_82546) {
1481 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1488 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1489 * @adapter: board private structure
1490 * @txdr: tx descriptor ring (for a specific queue) to setup
1492 * Return 0 on success, negative on failure
1494 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1495 struct e1000_tx_ring *txdr)
1497 struct pci_dev *pdev = adapter->pdev;
1500 size = sizeof(struct e1000_buffer) * txdr->count;
1501 txdr->buffer_info = vzalloc(size);
1502 if (!txdr->buffer_info)
1505 /* round up to nearest 4K */
1507 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1508 txdr->size = ALIGN(txdr->size, 4096);
1510 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1514 vfree(txdr->buffer_info);
1518 /* Fix for errata 23, can't cross 64kB boundary */
1519 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1520 void *olddesc = txdr->desc;
1521 dma_addr_t olddma = txdr->dma;
1522 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1523 txdr->size, txdr->desc);
1524 /* Try again, without freeing the previous */
1525 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1526 &txdr->dma, GFP_KERNEL);
1527 /* Failed allocation, critical failure */
1529 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1531 goto setup_tx_desc_die;
1534 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1536 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1538 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1540 e_err(probe, "Unable to allocate aligned memory "
1541 "for the transmit descriptor ring\n");
1542 vfree(txdr->buffer_info);
1545 /* Free old allocation, new allocation was successful */
1546 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1550 memset(txdr->desc, 0, txdr->size);
1552 txdr->next_to_use = 0;
1553 txdr->next_to_clean = 0;
1559 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1560 * (Descriptors) for all queues
1561 * @adapter: board private structure
1563 * Return 0 on success, negative on failure
1565 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1569 for (i = 0; i < adapter->num_tx_queues; i++) {
1570 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1572 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1573 for (i-- ; i >= 0; i--)
1574 e1000_free_tx_resources(adapter,
1575 &adapter->tx_ring[i]);
1584 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1585 * @adapter: board private structure
1587 * Configure the Tx unit of the MAC after a reset.
1589 static void e1000_configure_tx(struct e1000_adapter *adapter)
1592 struct e1000_hw *hw = &adapter->hw;
1593 u32 tdlen, tctl, tipg;
1596 /* Setup the HW Tx Head and Tail descriptor pointers */
1598 switch (adapter->num_tx_queues) {
1601 tdba = adapter->tx_ring[0].dma;
1602 tdlen = adapter->tx_ring[0].count *
1603 sizeof(struct e1000_tx_desc);
1605 ew32(TDBAH, (tdba >> 32));
1606 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1609 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ?
1610 E1000_TDH : E1000_82542_TDH);
1611 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ?
1612 E1000_TDT : E1000_82542_TDT);
1616 /* Set the default values for the Tx Inter Packet Gap timer */
1617 if ((hw->media_type == e1000_media_type_fiber ||
1618 hw->media_type == e1000_media_type_internal_serdes))
1619 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1621 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1623 switch (hw->mac_type) {
1624 case e1000_82542_rev2_0:
1625 case e1000_82542_rev2_1:
1626 tipg = DEFAULT_82542_TIPG_IPGT;
1627 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1628 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1631 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1632 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1635 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1636 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1639 /* Set the Tx Interrupt Delay register */
1641 ew32(TIDV, adapter->tx_int_delay);
1642 if (hw->mac_type >= e1000_82540)
1643 ew32(TADV, adapter->tx_abs_int_delay);
1645 /* Program the Transmit Control Register */
1648 tctl &= ~E1000_TCTL_CT;
1649 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1650 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1652 e1000_config_collision_dist(hw);
1654 /* Setup Transmit Descriptor Settings for eop descriptor */
1655 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1657 /* only set IDE if we are delaying interrupts using the timers */
1658 if (adapter->tx_int_delay)
1659 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1661 if (hw->mac_type < e1000_82543)
1662 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1664 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1666 /* Cache if we're 82544 running in PCI-X because we'll
1667 * need this to apply a workaround later in the send path.
1669 if (hw->mac_type == e1000_82544 &&
1670 hw->bus_type == e1000_bus_type_pcix)
1671 adapter->pcix_82544 = true;
1678 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1679 * @adapter: board private structure
1680 * @rxdr: rx descriptor ring (for a specific queue) to setup
1682 * Returns 0 on success, negative on failure
1684 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1685 struct e1000_rx_ring *rxdr)
1687 struct pci_dev *pdev = adapter->pdev;
1690 size = sizeof(struct e1000_buffer) * rxdr->count;
1691 rxdr->buffer_info = vzalloc(size);
1692 if (!rxdr->buffer_info)
1695 desc_len = sizeof(struct e1000_rx_desc);
1697 /* Round up to nearest 4K */
1699 rxdr->size = rxdr->count * desc_len;
1700 rxdr->size = ALIGN(rxdr->size, 4096);
1702 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1706 vfree(rxdr->buffer_info);
1710 /* Fix for errata 23, can't cross 64kB boundary */
1711 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1712 void *olddesc = rxdr->desc;
1713 dma_addr_t olddma = rxdr->dma;
1714 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1715 rxdr->size, rxdr->desc);
1716 /* Try again, without freeing the previous */
1717 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1718 &rxdr->dma, GFP_KERNEL);
1719 /* Failed allocation, critical failure */
1721 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1723 goto setup_rx_desc_die;
1726 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1728 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1730 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1732 e_err(probe, "Unable to allocate aligned memory for "
1733 "the Rx descriptor ring\n");
1734 goto setup_rx_desc_die;
1736 /* Free old allocation, new allocation was successful */
1737 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1741 memset(rxdr->desc, 0, rxdr->size);
1743 rxdr->next_to_clean = 0;
1744 rxdr->next_to_use = 0;
1745 rxdr->rx_skb_top = NULL;
1751 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1752 * (Descriptors) for all queues
1753 * @adapter: board private structure
1755 * Return 0 on success, negative on failure
1757 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1761 for (i = 0; i < adapter->num_rx_queues; i++) {
1762 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1764 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1765 for (i-- ; i >= 0; i--)
1766 e1000_free_rx_resources(adapter,
1767 &adapter->rx_ring[i]);
1776 * e1000_setup_rctl - configure the receive control registers
1777 * @adapter: Board private structure
1779 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1781 struct e1000_hw *hw = &adapter->hw;
1786 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1788 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1789 E1000_RCTL_RDMTS_HALF |
1790 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1792 if (hw->tbi_compatibility_on == 1)
1793 rctl |= E1000_RCTL_SBP;
1795 rctl &= ~E1000_RCTL_SBP;
1797 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1798 rctl &= ~E1000_RCTL_LPE;
1800 rctl |= E1000_RCTL_LPE;
1802 /* Setup buffer sizes */
1803 rctl &= ~E1000_RCTL_SZ_4096;
1804 rctl |= E1000_RCTL_BSEX;
1805 switch (adapter->rx_buffer_len) {
1806 case E1000_RXBUFFER_2048:
1808 rctl |= E1000_RCTL_SZ_2048;
1809 rctl &= ~E1000_RCTL_BSEX;
1811 case E1000_RXBUFFER_4096:
1812 rctl |= E1000_RCTL_SZ_4096;
1814 case E1000_RXBUFFER_8192:
1815 rctl |= E1000_RCTL_SZ_8192;
1817 case E1000_RXBUFFER_16384:
1818 rctl |= E1000_RCTL_SZ_16384;
1822 /* This is useful for sniffing bad packets. */
1823 if (adapter->netdev->features & NETIF_F_RXALL) {
1824 /* UPE and MPE will be handled by normal PROMISC logic
1825 * in e1000e_set_rx_mode
1827 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
1828 E1000_RCTL_BAM | /* RX All Bcast Pkts */
1829 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
1831 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
1832 E1000_RCTL_DPF | /* Allow filtered pause */
1833 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
1834 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1835 * and that breaks VLANs.
1843 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1844 * @adapter: board private structure
1846 * Configure the Rx unit of the MAC after a reset.
1848 static void e1000_configure_rx(struct e1000_adapter *adapter)
1851 struct e1000_hw *hw = &adapter->hw;
1852 u32 rdlen, rctl, rxcsum;
1854 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1855 rdlen = adapter->rx_ring[0].count *
1856 sizeof(struct e1000_rx_desc);
1857 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1858 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1860 rdlen = adapter->rx_ring[0].count *
1861 sizeof(struct e1000_rx_desc);
1862 adapter->clean_rx = e1000_clean_rx_irq;
1863 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1866 /* disable receives while setting up the descriptors */
1868 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1870 /* set the Receive Delay Timer Register */
1871 ew32(RDTR, adapter->rx_int_delay);
1873 if (hw->mac_type >= e1000_82540) {
1874 ew32(RADV, adapter->rx_abs_int_delay);
1875 if (adapter->itr_setting != 0)
1876 ew32(ITR, 1000000000 / (adapter->itr * 256));
1879 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1880 * the Base and Length of the Rx Descriptor Ring
1882 switch (adapter->num_rx_queues) {
1885 rdba = adapter->rx_ring[0].dma;
1887 ew32(RDBAH, (rdba >> 32));
1888 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1891 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ?
1892 E1000_RDH : E1000_82542_RDH);
1893 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ?
1894 E1000_RDT : E1000_82542_RDT);
1898 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1899 if (hw->mac_type >= e1000_82543) {
1900 rxcsum = er32(RXCSUM);
1901 if (adapter->rx_csum)
1902 rxcsum |= E1000_RXCSUM_TUOFL;
1904 /* don't need to clear IPPCSE as it defaults to 0 */
1905 rxcsum &= ~E1000_RXCSUM_TUOFL;
1906 ew32(RXCSUM, rxcsum);
1909 /* Enable Receives */
1910 ew32(RCTL, rctl | E1000_RCTL_EN);
1914 * e1000_free_tx_resources - Free Tx Resources per Queue
1915 * @adapter: board private structure
1916 * @tx_ring: Tx descriptor ring for a specific queue
1918 * Free all transmit software resources
1920 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1921 struct e1000_tx_ring *tx_ring)
1923 struct pci_dev *pdev = adapter->pdev;
1925 e1000_clean_tx_ring(adapter, tx_ring);
1927 vfree(tx_ring->buffer_info);
1928 tx_ring->buffer_info = NULL;
1930 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1933 tx_ring->desc = NULL;
1937 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1938 * @adapter: board private structure
1940 * Free all transmit software resources
1942 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1946 for (i = 0; i < adapter->num_tx_queues; i++)
1947 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1950 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1951 struct e1000_buffer *buffer_info)
1953 if (buffer_info->dma) {
1954 if (buffer_info->mapped_as_page)
1955 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1956 buffer_info->length, DMA_TO_DEVICE);
1958 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1959 buffer_info->length,
1961 buffer_info->dma = 0;
1963 if (buffer_info->skb) {
1964 dev_kfree_skb_any(buffer_info->skb);
1965 buffer_info->skb = NULL;
1967 buffer_info->time_stamp = 0;
1968 /* buffer_info must be completely set up in the transmit path */
1972 * e1000_clean_tx_ring - Free Tx Buffers
1973 * @adapter: board private structure
1974 * @tx_ring: ring to be cleaned
1976 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1977 struct e1000_tx_ring *tx_ring)
1979 struct e1000_hw *hw = &adapter->hw;
1980 struct e1000_buffer *buffer_info;
1984 /* Free all the Tx ring sk_buffs */
1986 for (i = 0; i < tx_ring->count; i++) {
1987 buffer_info = &tx_ring->buffer_info[i];
1988 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1991 netdev_reset_queue(adapter->netdev);
1992 size = sizeof(struct e1000_buffer) * tx_ring->count;
1993 memset(tx_ring->buffer_info, 0, size);
1995 /* Zero out the descriptor ring */
1997 memset(tx_ring->desc, 0, tx_ring->size);
1999 tx_ring->next_to_use = 0;
2000 tx_ring->next_to_clean = 0;
2001 tx_ring->last_tx_tso = false;
2003 writel(0, hw->hw_addr + tx_ring->tdh);
2004 writel(0, hw->hw_addr + tx_ring->tdt);
2008 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2009 * @adapter: board private structure
2011 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2015 for (i = 0; i < adapter->num_tx_queues; i++)
2016 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2020 * e1000_free_rx_resources - Free Rx Resources
2021 * @adapter: board private structure
2022 * @rx_ring: ring to clean the resources from
2024 * Free all receive software resources
2026 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2027 struct e1000_rx_ring *rx_ring)
2029 struct pci_dev *pdev = adapter->pdev;
2031 e1000_clean_rx_ring(adapter, rx_ring);
2033 vfree(rx_ring->buffer_info);
2034 rx_ring->buffer_info = NULL;
2036 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2039 rx_ring->desc = NULL;
2043 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2044 * @adapter: board private structure
2046 * Free all receive software resources
2048 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2052 for (i = 0; i < adapter->num_rx_queues; i++)
2053 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2057 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2058 * @adapter: board private structure
2059 * @rx_ring: ring to free buffers from
2061 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2062 struct e1000_rx_ring *rx_ring)
2064 struct e1000_hw *hw = &adapter->hw;
2065 struct e1000_buffer *buffer_info;
2066 struct pci_dev *pdev = adapter->pdev;
2070 /* Free all the Rx ring sk_buffs */
2071 for (i = 0; i < rx_ring->count; i++) {
2072 buffer_info = &rx_ring->buffer_info[i];
2073 if (buffer_info->dma &&
2074 adapter->clean_rx == e1000_clean_rx_irq) {
2075 dma_unmap_single(&pdev->dev, buffer_info->dma,
2076 buffer_info->length,
2078 } else if (buffer_info->dma &&
2079 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2080 dma_unmap_page(&pdev->dev, buffer_info->dma,
2081 buffer_info->length,
2085 buffer_info->dma = 0;
2086 if (buffer_info->page) {
2087 put_page(buffer_info->page);
2088 buffer_info->page = NULL;
2090 if (buffer_info->skb) {
2091 dev_kfree_skb(buffer_info->skb);
2092 buffer_info->skb = NULL;
2096 /* there also may be some cached data from a chained receive */
2097 if (rx_ring->rx_skb_top) {
2098 dev_kfree_skb(rx_ring->rx_skb_top);
2099 rx_ring->rx_skb_top = NULL;
2102 size = sizeof(struct e1000_buffer) * rx_ring->count;
2103 memset(rx_ring->buffer_info, 0, size);
2105 /* Zero out the descriptor ring */
2106 memset(rx_ring->desc, 0, rx_ring->size);
2108 rx_ring->next_to_clean = 0;
2109 rx_ring->next_to_use = 0;
2111 writel(0, hw->hw_addr + rx_ring->rdh);
2112 writel(0, hw->hw_addr + rx_ring->rdt);
2116 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2117 * @adapter: board private structure
2119 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2123 for (i = 0; i < adapter->num_rx_queues; i++)
2124 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2127 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2128 * and memory write and invalidate disabled for certain operations
2130 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2132 struct e1000_hw *hw = &adapter->hw;
2133 struct net_device *netdev = adapter->netdev;
2136 e1000_pci_clear_mwi(hw);
2139 rctl |= E1000_RCTL_RST;
2141 E1000_WRITE_FLUSH();
2144 if (netif_running(netdev))
2145 e1000_clean_all_rx_rings(adapter);
2148 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2150 struct e1000_hw *hw = &adapter->hw;
2151 struct net_device *netdev = adapter->netdev;
2155 rctl &= ~E1000_RCTL_RST;
2157 E1000_WRITE_FLUSH();
2160 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2161 e1000_pci_set_mwi(hw);
2163 if (netif_running(netdev)) {
2164 /* No need to loop, because 82542 supports only 1 queue */
2165 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2166 e1000_configure_rx(adapter);
2167 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2172 * e1000_set_mac - Change the Ethernet Address of the NIC
2173 * @netdev: network interface device structure
2174 * @p: pointer to an address structure
2176 * Returns 0 on success, negative on failure
2178 static int e1000_set_mac(struct net_device *netdev, void *p)
2180 struct e1000_adapter *adapter = netdev_priv(netdev);
2181 struct e1000_hw *hw = &adapter->hw;
2182 struct sockaddr *addr = p;
2184 if (!is_valid_ether_addr(addr->sa_data))
2185 return -EADDRNOTAVAIL;
2187 /* 82542 2.0 needs to be in reset to write receive address registers */
2189 if (hw->mac_type == e1000_82542_rev2_0)
2190 e1000_enter_82542_rst(adapter);
2192 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2193 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2195 e1000_rar_set(hw, hw->mac_addr, 0);
2197 if (hw->mac_type == e1000_82542_rev2_0)
2198 e1000_leave_82542_rst(adapter);
2204 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2205 * @netdev: network interface device structure
2207 * The set_rx_mode entry point is called whenever the unicast or multicast
2208 * address lists or the network interface flags are updated. This routine is
2209 * responsible for configuring the hardware for proper unicast, multicast,
2210 * promiscuous mode, and all-multi behavior.
2212 static void e1000_set_rx_mode(struct net_device *netdev)
2214 struct e1000_adapter *adapter = netdev_priv(netdev);
2215 struct e1000_hw *hw = &adapter->hw;
2216 struct netdev_hw_addr *ha;
2217 bool use_uc = false;
2220 int i, rar_entries = E1000_RAR_ENTRIES;
2221 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2222 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2227 /* Check for Promiscuous and All Multicast modes */
2231 if (netdev->flags & IFF_PROMISC) {
2232 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2233 rctl &= ~E1000_RCTL_VFE;
2235 if (netdev->flags & IFF_ALLMULTI)
2236 rctl |= E1000_RCTL_MPE;
2238 rctl &= ~E1000_RCTL_MPE;
2239 /* Enable VLAN filter if there is a VLAN */
2240 if (e1000_vlan_used(adapter))
2241 rctl |= E1000_RCTL_VFE;
2244 if (netdev_uc_count(netdev) > rar_entries - 1) {
2245 rctl |= E1000_RCTL_UPE;
2246 } else if (!(netdev->flags & IFF_PROMISC)) {
2247 rctl &= ~E1000_RCTL_UPE;
2253 /* 82542 2.0 needs to be in reset to write receive address registers */
2255 if (hw->mac_type == e1000_82542_rev2_0)
2256 e1000_enter_82542_rst(adapter);
2258 /* load the first 14 addresses into the exact filters 1-14. Unicast
2259 * addresses take precedence to avoid disabling unicast filtering
2262 * RAR 0 is used for the station MAC address
2263 * if there are not 14 addresses, go ahead and clear the filters
2267 netdev_for_each_uc_addr(ha, netdev) {
2268 if (i == rar_entries)
2270 e1000_rar_set(hw, ha->addr, i++);
2273 netdev_for_each_mc_addr(ha, netdev) {
2274 if (i == rar_entries) {
2275 /* load any remaining addresses into the hash table */
2276 u32 hash_reg, hash_bit, mta;
2277 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2278 hash_reg = (hash_value >> 5) & 0x7F;
2279 hash_bit = hash_value & 0x1F;
2280 mta = (1 << hash_bit);
2281 mcarray[hash_reg] |= mta;
2283 e1000_rar_set(hw, ha->addr, i++);
2287 for (; i < rar_entries; i++) {
2288 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2289 E1000_WRITE_FLUSH();
2290 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2291 E1000_WRITE_FLUSH();
2294 /* write the hash table completely, write from bottom to avoid
2295 * both stupid write combining chipsets, and flushing each write
2297 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2298 /* If we are on an 82544 has an errata where writing odd
2299 * offsets overwrites the previous even offset, but writing
2300 * backwards over the range solves the issue by always
2301 * writing the odd offset first
2303 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2305 E1000_WRITE_FLUSH();
2307 if (hw->mac_type == e1000_82542_rev2_0)
2308 e1000_leave_82542_rst(adapter);
2314 * e1000_update_phy_info_task - get phy info
2315 * @work: work struct contained inside adapter struct
2317 * Need to wait a few seconds after link up to get diagnostic information from
2320 static void e1000_update_phy_info_task(struct work_struct *work)
2322 struct e1000_adapter *adapter = container_of(work,
2323 struct e1000_adapter,
2324 phy_info_task.work);
2326 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2330 * e1000_82547_tx_fifo_stall_task - task to complete work
2331 * @work: work struct contained inside adapter struct
2333 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2335 struct e1000_adapter *adapter = container_of(work,
2336 struct e1000_adapter,
2337 fifo_stall_task.work);
2338 struct e1000_hw *hw = &adapter->hw;
2339 struct net_device *netdev = adapter->netdev;
2342 if (atomic_read(&adapter->tx_fifo_stall)) {
2343 if ((er32(TDT) == er32(TDH)) &&
2344 (er32(TDFT) == er32(TDFH)) &&
2345 (er32(TDFTS) == er32(TDFHS))) {
2347 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2348 ew32(TDFT, adapter->tx_head_addr);
2349 ew32(TDFH, adapter->tx_head_addr);
2350 ew32(TDFTS, adapter->tx_head_addr);
2351 ew32(TDFHS, adapter->tx_head_addr);
2353 E1000_WRITE_FLUSH();
2355 adapter->tx_fifo_head = 0;
2356 atomic_set(&adapter->tx_fifo_stall, 0);
2357 netif_wake_queue(netdev);
2358 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2359 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2364 bool e1000_has_link(struct e1000_adapter *adapter)
2366 struct e1000_hw *hw = &adapter->hw;
2367 bool link_active = false;
2369 /* get_link_status is set on LSC (link status) interrupt or rx
2370 * sequence error interrupt (except on intel ce4100).
2371 * get_link_status will stay false until the
2372 * e1000_check_for_link establishes link for copper adapters
2375 switch (hw->media_type) {
2376 case e1000_media_type_copper:
2377 if (hw->mac_type == e1000_ce4100)
2378 hw->get_link_status = 1;
2379 if (hw->get_link_status) {
2380 e1000_check_for_link(hw);
2381 link_active = !hw->get_link_status;
2386 case e1000_media_type_fiber:
2387 e1000_check_for_link(hw);
2388 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2390 case e1000_media_type_internal_serdes:
2391 e1000_check_for_link(hw);
2392 link_active = hw->serdes_has_link;
2402 * e1000_watchdog - work function
2403 * @work: work struct contained inside adapter struct
2405 static void e1000_watchdog(struct work_struct *work)
2407 struct e1000_adapter *adapter = container_of(work,
2408 struct e1000_adapter,
2409 watchdog_task.work);
2410 struct e1000_hw *hw = &adapter->hw;
2411 struct net_device *netdev = adapter->netdev;
2412 struct e1000_tx_ring *txdr = adapter->tx_ring;
2415 link = e1000_has_link(adapter);
2416 if ((netif_carrier_ok(netdev)) && link)
2420 if (!netif_carrier_ok(netdev)) {
2423 /* update snapshot of PHY registers on LSC */
2424 e1000_get_speed_and_duplex(hw,
2425 &adapter->link_speed,
2426 &adapter->link_duplex);
2429 pr_info("%s NIC Link is Up %d Mbps %s, "
2430 "Flow Control: %s\n",
2432 adapter->link_speed,
2433 adapter->link_duplex == FULL_DUPLEX ?
2434 "Full Duplex" : "Half Duplex",
2435 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2436 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2437 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2438 E1000_CTRL_TFCE) ? "TX" : "None")));
2440 /* adjust timeout factor according to speed/duplex */
2441 adapter->tx_timeout_factor = 1;
2442 switch (adapter->link_speed) {
2445 adapter->tx_timeout_factor = 16;
2449 /* maybe add some timeout factor ? */
2453 /* enable transmits in the hardware */
2455 tctl |= E1000_TCTL_EN;
2458 netif_carrier_on(netdev);
2459 if (!test_bit(__E1000_DOWN, &adapter->flags))
2460 schedule_delayed_work(&adapter->phy_info_task,
2462 adapter->smartspeed = 0;
2465 if (netif_carrier_ok(netdev)) {
2466 adapter->link_speed = 0;
2467 adapter->link_duplex = 0;
2468 pr_info("%s NIC Link is Down\n",
2470 netif_carrier_off(netdev);
2472 if (!test_bit(__E1000_DOWN, &adapter->flags))
2473 schedule_delayed_work(&adapter->phy_info_task,
2477 e1000_smartspeed(adapter);
2481 e1000_update_stats(adapter);
2483 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2484 adapter->tpt_old = adapter->stats.tpt;
2485 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2486 adapter->colc_old = adapter->stats.colc;
2488 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2489 adapter->gorcl_old = adapter->stats.gorcl;
2490 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2491 adapter->gotcl_old = adapter->stats.gotcl;
2493 e1000_update_adaptive(hw);
2495 if (!netif_carrier_ok(netdev)) {
2496 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2497 /* We've lost link, so the controller stops DMA,
2498 * but we've got queued Tx work that's never going
2499 * to get done, so reset controller to flush Tx.
2500 * (Do the reset outside of interrupt context).
2502 adapter->tx_timeout_count++;
2503 schedule_work(&adapter->reset_task);
2504 /* exit immediately since reset is imminent */
2509 /* Simple mode for Interrupt Throttle Rate (ITR) */
2510 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2511 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2512 * Total asymmetrical Tx or Rx gets ITR=8000;
2513 * everyone else is between 2000-8000.
2515 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2516 u32 dif = (adapter->gotcl > adapter->gorcl ?
2517 adapter->gotcl - adapter->gorcl :
2518 adapter->gorcl - adapter->gotcl) / 10000;
2519 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2521 ew32(ITR, 1000000000 / (itr * 256));
2524 /* Cause software interrupt to ensure rx ring is cleaned */
2525 ew32(ICS, E1000_ICS_RXDMT0);
2527 /* Force detection of hung controller every watchdog period */
2528 adapter->detect_tx_hung = true;
2530 /* Reschedule the task */
2531 if (!test_bit(__E1000_DOWN, &adapter->flags))
2532 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2535 enum latency_range {
2539 latency_invalid = 255
2543 * e1000_update_itr - update the dynamic ITR value based on statistics
2544 * @adapter: pointer to adapter
2545 * @itr_setting: current adapter->itr
2546 * @packets: the number of packets during this measurement interval
2547 * @bytes: the number of bytes during this measurement interval
2549 * Stores a new ITR value based on packets and byte
2550 * counts during the last interrupt. The advantage of per interrupt
2551 * computation is faster updates and more accurate ITR for the current
2552 * traffic pattern. Constants in this function were computed
2553 * based on theoretical maximum wire speed and thresholds were set based
2554 * on testing data as well as attempting to minimize response time
2555 * while increasing bulk throughput.
2556 * this functionality is controlled by the InterruptThrottleRate module
2557 * parameter (see e1000_param.c)
2559 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2560 u16 itr_setting, int packets, int bytes)
2562 unsigned int retval = itr_setting;
2563 struct e1000_hw *hw = &adapter->hw;
2565 if (unlikely(hw->mac_type < e1000_82540))
2566 goto update_itr_done;
2569 goto update_itr_done;
2571 switch (itr_setting) {
2572 case lowest_latency:
2573 /* jumbo frames get bulk treatment*/
2574 if (bytes/packets > 8000)
2575 retval = bulk_latency;
2576 else if ((packets < 5) && (bytes > 512))
2577 retval = low_latency;
2579 case low_latency: /* 50 usec aka 20000 ints/s */
2580 if (bytes > 10000) {
2581 /* jumbo frames need bulk latency setting */
2582 if (bytes/packets > 8000)
2583 retval = bulk_latency;
2584 else if ((packets < 10) || ((bytes/packets) > 1200))
2585 retval = bulk_latency;
2586 else if ((packets > 35))
2587 retval = lowest_latency;
2588 } else if (bytes/packets > 2000)
2589 retval = bulk_latency;
2590 else if (packets <= 2 && bytes < 512)
2591 retval = lowest_latency;
2593 case bulk_latency: /* 250 usec aka 4000 ints/s */
2594 if (bytes > 25000) {
2596 retval = low_latency;
2597 } else if (bytes < 6000) {
2598 retval = low_latency;
2607 static void e1000_set_itr(struct e1000_adapter *adapter)
2609 struct e1000_hw *hw = &adapter->hw;
2611 u32 new_itr = adapter->itr;
2613 if (unlikely(hw->mac_type < e1000_82540))
2616 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2617 if (unlikely(adapter->link_speed != SPEED_1000)) {
2623 adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr,
2624 adapter->total_tx_packets,
2625 adapter->total_tx_bytes);
2626 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2627 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2628 adapter->tx_itr = low_latency;
2630 adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr,
2631 adapter->total_rx_packets,
2632 adapter->total_rx_bytes);
2633 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2634 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2635 adapter->rx_itr = low_latency;
2637 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2639 switch (current_itr) {
2640 /* counts and packets in update_itr are dependent on these numbers */
2641 case lowest_latency:
2645 new_itr = 20000; /* aka hwitr = ~200 */
2655 if (new_itr != adapter->itr) {
2656 /* this attempts to bias the interrupt rate towards Bulk
2657 * by adding intermediate steps when interrupt rate is
2660 new_itr = new_itr > adapter->itr ?
2661 min(adapter->itr + (new_itr >> 2), new_itr) :
2663 adapter->itr = new_itr;
2664 ew32(ITR, 1000000000 / (new_itr * 256));
2668 #define E1000_TX_FLAGS_CSUM 0x00000001
2669 #define E1000_TX_FLAGS_VLAN 0x00000002
2670 #define E1000_TX_FLAGS_TSO 0x00000004
2671 #define E1000_TX_FLAGS_IPV4 0x00000008
2672 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2673 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2674 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2676 static int e1000_tso(struct e1000_adapter *adapter,
2677 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2679 struct e1000_context_desc *context_desc;
2680 struct e1000_buffer *buffer_info;
2683 u16 ipcse = 0, tucse, mss;
2684 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2686 if (skb_is_gso(skb)) {
2689 err = skb_cow_head(skb, 0);
2693 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2694 mss = skb_shinfo(skb)->gso_size;
2695 if (skb->protocol == htons(ETH_P_IP)) {
2696 struct iphdr *iph = ip_hdr(skb);
2699 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2703 cmd_length = E1000_TXD_CMD_IP;
2704 ipcse = skb_transport_offset(skb) - 1;
2705 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2706 ipv6_hdr(skb)->payload_len = 0;
2707 tcp_hdr(skb)->check =
2708 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2709 &ipv6_hdr(skb)->daddr,
2713 ipcss = skb_network_offset(skb);
2714 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2715 tucss = skb_transport_offset(skb);
2716 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2719 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2720 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2722 i = tx_ring->next_to_use;
2723 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2724 buffer_info = &tx_ring->buffer_info[i];
2726 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2727 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2728 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2729 context_desc->upper_setup.tcp_fields.tucss = tucss;
2730 context_desc->upper_setup.tcp_fields.tucso = tucso;
2731 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2732 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2733 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2734 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2736 buffer_info->time_stamp = jiffies;
2737 buffer_info->next_to_watch = i;
2739 if (++i == tx_ring->count) i = 0;
2740 tx_ring->next_to_use = i;
2747 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2748 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2750 struct e1000_context_desc *context_desc;
2751 struct e1000_buffer *buffer_info;
2754 u32 cmd_len = E1000_TXD_CMD_DEXT;
2756 if (skb->ip_summed != CHECKSUM_PARTIAL)
2759 switch (skb->protocol) {
2760 case cpu_to_be16(ETH_P_IP):
2761 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2762 cmd_len |= E1000_TXD_CMD_TCP;
2764 case cpu_to_be16(ETH_P_IPV6):
2765 /* XXX not handling all IPV6 headers */
2766 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2767 cmd_len |= E1000_TXD_CMD_TCP;
2770 if (unlikely(net_ratelimit()))
2771 e_warn(drv, "checksum_partial proto=%x!\n",
2776 css = skb_checksum_start_offset(skb);
2778 i = tx_ring->next_to_use;
2779 buffer_info = &tx_ring->buffer_info[i];
2780 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2782 context_desc->lower_setup.ip_config = 0;
2783 context_desc->upper_setup.tcp_fields.tucss = css;
2784 context_desc->upper_setup.tcp_fields.tucso =
2785 css + skb->csum_offset;
2786 context_desc->upper_setup.tcp_fields.tucse = 0;
2787 context_desc->tcp_seg_setup.data = 0;
2788 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2790 buffer_info->time_stamp = jiffies;
2791 buffer_info->next_to_watch = i;
2793 if (unlikely(++i == tx_ring->count)) i = 0;
2794 tx_ring->next_to_use = i;
2799 #define E1000_MAX_TXD_PWR 12
2800 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2802 static int e1000_tx_map(struct e1000_adapter *adapter,
2803 struct e1000_tx_ring *tx_ring,
2804 struct sk_buff *skb, unsigned int first,
2805 unsigned int max_per_txd, unsigned int nr_frags,
2808 struct e1000_hw *hw = &adapter->hw;
2809 struct pci_dev *pdev = adapter->pdev;
2810 struct e1000_buffer *buffer_info;
2811 unsigned int len = skb_headlen(skb);
2812 unsigned int offset = 0, size, count = 0, i;
2813 unsigned int f, bytecount, segs;
2815 i = tx_ring->next_to_use;
2818 buffer_info = &tx_ring->buffer_info[i];
2819 size = min(len, max_per_txd);
2820 /* Workaround for Controller erratum --
2821 * descriptor for non-tso packet in a linear SKB that follows a
2822 * tso gets written back prematurely before the data is fully
2823 * DMA'd to the controller
2825 if (!skb->data_len && tx_ring->last_tx_tso &&
2827 tx_ring->last_tx_tso = false;
2831 /* Workaround for premature desc write-backs
2832 * in TSO mode. Append 4-byte sentinel desc
2834 if (unlikely(mss && !nr_frags && size == len && size > 8))
2836 /* work-around for errata 10 and it applies
2837 * to all controllers in PCI-X mode
2838 * The fix is to make sure that the first descriptor of a
2839 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2841 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2842 (size > 2015) && count == 0))
2845 /* Workaround for potential 82544 hang in PCI-X. Avoid
2846 * terminating buffers within evenly-aligned dwords.
2848 if (unlikely(adapter->pcix_82544 &&
2849 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2853 buffer_info->length = size;
2854 /* set time_stamp *before* dma to help avoid a possible race */
2855 buffer_info->time_stamp = jiffies;
2856 buffer_info->mapped_as_page = false;
2857 buffer_info->dma = dma_map_single(&pdev->dev,
2859 size, DMA_TO_DEVICE);
2860 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2862 buffer_info->next_to_watch = i;
2869 if (unlikely(i == tx_ring->count))
2874 for (f = 0; f < nr_frags; f++) {
2875 const struct skb_frag_struct *frag;
2877 frag = &skb_shinfo(skb)->frags[f];
2878 len = skb_frag_size(frag);
2882 unsigned long bufend;
2884 if (unlikely(i == tx_ring->count))
2887 buffer_info = &tx_ring->buffer_info[i];
2888 size = min(len, max_per_txd);
2889 /* Workaround for premature desc write-backs
2890 * in TSO mode. Append 4-byte sentinel desc
2892 if (unlikely(mss && f == (nr_frags-1) &&
2893 size == len && size > 8))
2895 /* Workaround for potential 82544 hang in PCI-X.
2896 * Avoid terminating buffers within evenly-aligned
2899 bufend = (unsigned long)
2900 page_to_phys(skb_frag_page(frag));
2901 bufend += offset + size - 1;
2902 if (unlikely(adapter->pcix_82544 &&
2907 buffer_info->length = size;
2908 buffer_info->time_stamp = jiffies;
2909 buffer_info->mapped_as_page = true;
2910 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2911 offset, size, DMA_TO_DEVICE);
2912 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2914 buffer_info->next_to_watch = i;
2922 segs = skb_shinfo(skb)->gso_segs ?: 1;
2923 /* multiply data chunks by size of headers */
2924 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2926 tx_ring->buffer_info[i].skb = skb;
2927 tx_ring->buffer_info[i].segs = segs;
2928 tx_ring->buffer_info[i].bytecount = bytecount;
2929 tx_ring->buffer_info[first].next_to_watch = i;
2934 dev_err(&pdev->dev, "TX DMA map failed\n");
2935 buffer_info->dma = 0;
2941 i += tx_ring->count;
2943 buffer_info = &tx_ring->buffer_info[i];
2944 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2950 static void e1000_tx_queue(struct e1000_adapter *adapter,
2951 struct e1000_tx_ring *tx_ring, int tx_flags,
2954 struct e1000_hw *hw = &adapter->hw;
2955 struct e1000_tx_desc *tx_desc = NULL;
2956 struct e1000_buffer *buffer_info;
2957 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2960 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2961 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2963 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2965 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2966 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2969 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2970 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2971 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2974 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2975 txd_lower |= E1000_TXD_CMD_VLE;
2976 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2979 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
2980 txd_lower &= ~(E1000_TXD_CMD_IFCS);
2982 i = tx_ring->next_to_use;
2985 buffer_info = &tx_ring->buffer_info[i];
2986 tx_desc = E1000_TX_DESC(*tx_ring, i);
2987 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2988 tx_desc->lower.data =
2989 cpu_to_le32(txd_lower | buffer_info->length);
2990 tx_desc->upper.data = cpu_to_le32(txd_upper);
2991 if (unlikely(++i == tx_ring->count)) i = 0;
2994 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2996 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
2997 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
2998 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3000 /* Force memory writes to complete before letting h/w
3001 * know there are new descriptors to fetch. (Only
3002 * applicable for weak-ordered memory model archs,
3007 tx_ring->next_to_use = i;
3008 writel(i, hw->hw_addr + tx_ring->tdt);
3009 /* we need this if more than one processor can write to our tail
3010 * at a time, it synchronizes IO on IA64/Altix systems
3015 /* 82547 workaround to avoid controller hang in half-duplex environment.
3016 * The workaround is to avoid queuing a large packet that would span
3017 * the internal Tx FIFO ring boundary by notifying the stack to resend
3018 * the packet at a later time. This gives the Tx FIFO an opportunity to
3019 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3020 * to the beginning of the Tx FIFO.
3023 #define E1000_FIFO_HDR 0x10
3024 #define E1000_82547_PAD_LEN 0x3E0
3026 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3027 struct sk_buff *skb)
3029 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3030 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3032 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3034 if (adapter->link_duplex != HALF_DUPLEX)
3035 goto no_fifo_stall_required;
3037 if (atomic_read(&adapter->tx_fifo_stall))
3040 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3041 atomic_set(&adapter->tx_fifo_stall, 1);
3045 no_fifo_stall_required:
3046 adapter->tx_fifo_head += skb_fifo_len;
3047 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3048 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3052 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3054 struct e1000_adapter *adapter = netdev_priv(netdev);
3055 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3057 netif_stop_queue(netdev);
3058 /* Herbert's original patch had:
3059 * smp_mb__after_netif_stop_queue();
3060 * but since that doesn't exist yet, just open code it.
3064 /* We need to check again in a case another CPU has just
3065 * made room available.
3067 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3071 netif_start_queue(netdev);
3072 ++adapter->restart_queue;
3076 static int e1000_maybe_stop_tx(struct net_device *netdev,
3077 struct e1000_tx_ring *tx_ring, int size)
3079 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3081 return __e1000_maybe_stop_tx(netdev, size);
3084 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3085 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3086 struct net_device *netdev)
3088 struct e1000_adapter *adapter = netdev_priv(netdev);
3089 struct e1000_hw *hw = &adapter->hw;
3090 struct e1000_tx_ring *tx_ring;
3091 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3092 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3093 unsigned int tx_flags = 0;
3094 unsigned int len = skb_headlen(skb);
3095 unsigned int nr_frags;
3101 /* This goes back to the question of how to logically map a Tx queue
3102 * to a flow. Right now, performance is impacted slightly negatively
3103 * if using multiple Tx queues. If the stack breaks away from a
3104 * single qdisc implementation, we can look at this again.
3106 tx_ring = adapter->tx_ring;
3108 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3109 * packets may get corrupted during padding by HW.
3110 * To WA this issue, pad all small packets manually.
3112 if (skb->len < ETH_ZLEN) {
3113 if (skb_pad(skb, ETH_ZLEN - skb->len))
3114 return NETDEV_TX_OK;
3115 skb->len = ETH_ZLEN;
3116 skb_set_tail_pointer(skb, ETH_ZLEN);
3119 mss = skb_shinfo(skb)->gso_size;
3120 /* The controller does a simple calculation to
3121 * make sure there is enough room in the FIFO before
3122 * initiating the DMA for each buffer. The calc is:
3123 * 4 = ceil(buffer len/mss). To make sure we don't
3124 * overrun the FIFO, adjust the max buffer len if mss
3129 max_per_txd = min(mss << 2, max_per_txd);
3130 max_txd_pwr = fls(max_per_txd) - 1;
3132 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3133 if (skb->data_len && hdr_len == len) {
3134 switch (hw->mac_type) {
3135 unsigned int pull_size;
3137 /* Make sure we have room to chop off 4 bytes,
3138 * and that the end alignment will work out to
3139 * this hardware's requirements
3140 * NOTE: this is a TSO only workaround
3141 * if end byte alignment not correct move us
3142 * into the next dword
3144 if ((unsigned long)(skb_tail_pointer(skb) - 1)
3148 pull_size = min((unsigned int)4, skb->data_len);
3149 if (!__pskb_pull_tail(skb, pull_size)) {
3150 e_err(drv, "__pskb_pull_tail "
3152 dev_kfree_skb_any(skb);
3153 return NETDEV_TX_OK;
3155 len = skb_headlen(skb);
3164 /* reserve a descriptor for the offload context */
3165 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3169 /* Controller Erratum workaround */
3170 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3173 count += TXD_USE_COUNT(len, max_txd_pwr);
3175 if (adapter->pcix_82544)
3178 /* work-around for errata 10 and it applies to all controllers
3179 * in PCI-X mode, so add one more descriptor to the count
3181 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3185 nr_frags = skb_shinfo(skb)->nr_frags;
3186 for (f = 0; f < nr_frags; f++)
3187 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3189 if (adapter->pcix_82544)
3192 /* need: count + 2 desc gap to keep tail from touching
3193 * head, otherwise try next time
3195 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3196 return NETDEV_TX_BUSY;
3198 if (unlikely((hw->mac_type == e1000_82547) &&
3199 (e1000_82547_fifo_workaround(adapter, skb)))) {
3200 netif_stop_queue(netdev);
3201 if (!test_bit(__E1000_DOWN, &adapter->flags))
3202 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3203 return NETDEV_TX_BUSY;
3206 if (vlan_tx_tag_present(skb)) {
3207 tx_flags |= E1000_TX_FLAGS_VLAN;
3208 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3211 first = tx_ring->next_to_use;
3213 tso = e1000_tso(adapter, tx_ring, skb);
3215 dev_kfree_skb_any(skb);
3216 return NETDEV_TX_OK;
3220 if (likely(hw->mac_type != e1000_82544))
3221 tx_ring->last_tx_tso = true;
3222 tx_flags |= E1000_TX_FLAGS_TSO;
3223 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3224 tx_flags |= E1000_TX_FLAGS_CSUM;
3226 if (likely(skb->protocol == htons(ETH_P_IP)))
3227 tx_flags |= E1000_TX_FLAGS_IPV4;
3229 if (unlikely(skb->no_fcs))
3230 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3232 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3236 netdev_sent_queue(netdev, skb->len);
3237 skb_tx_timestamp(skb);
3239 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3240 /* Make sure there is space in the ring for the next send. */
3241 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3244 dev_kfree_skb_any(skb);
3245 tx_ring->buffer_info[first].time_stamp = 0;
3246 tx_ring->next_to_use = first;
3249 return NETDEV_TX_OK;
3252 #define NUM_REGS 38 /* 1 based count */
3253 static void e1000_regdump(struct e1000_adapter *adapter)
3255 struct e1000_hw *hw = &adapter->hw;
3257 u32 *regs_buff = regs;
3260 static const char * const reg_name[] = {
3262 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3263 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3264 "TIDV", "TXDCTL", "TADV", "TARC0",
3265 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3267 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3268 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3269 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3272 regs_buff[0] = er32(CTRL);
3273 regs_buff[1] = er32(STATUS);
3275 regs_buff[2] = er32(RCTL);
3276 regs_buff[3] = er32(RDLEN);
3277 regs_buff[4] = er32(RDH);
3278 regs_buff[5] = er32(RDT);
3279 regs_buff[6] = er32(RDTR);
3281 regs_buff[7] = er32(TCTL);
3282 regs_buff[8] = er32(TDBAL);
3283 regs_buff[9] = er32(TDBAH);
3284 regs_buff[10] = er32(TDLEN);
3285 regs_buff[11] = er32(TDH);
3286 regs_buff[12] = er32(TDT);
3287 regs_buff[13] = er32(TIDV);
3288 regs_buff[14] = er32(TXDCTL);
3289 regs_buff[15] = er32(TADV);
3290 regs_buff[16] = er32(TARC0);
3292 regs_buff[17] = er32(TDBAL1);
3293 regs_buff[18] = er32(TDBAH1);
3294 regs_buff[19] = er32(TDLEN1);
3295 regs_buff[20] = er32(TDH1);
3296 regs_buff[21] = er32(TDT1);
3297 regs_buff[22] = er32(TXDCTL1);
3298 regs_buff[23] = er32(TARC1);
3299 regs_buff[24] = er32(CTRL_EXT);
3300 regs_buff[25] = er32(ERT);
3301 regs_buff[26] = er32(RDBAL0);
3302 regs_buff[27] = er32(RDBAH0);
3303 regs_buff[28] = er32(TDFH);
3304 regs_buff[29] = er32(TDFT);
3305 regs_buff[30] = er32(TDFHS);
3306 regs_buff[31] = er32(TDFTS);
3307 regs_buff[32] = er32(TDFPC);
3308 regs_buff[33] = er32(RDFH);
3309 regs_buff[34] = er32(RDFT);
3310 regs_buff[35] = er32(RDFHS);
3311 regs_buff[36] = er32(RDFTS);
3312 regs_buff[37] = er32(RDFPC);
3314 pr_info("Register dump\n");
3315 for (i = 0; i < NUM_REGS; i++)
3316 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3320 * e1000_dump: Print registers, tx ring and rx ring
3322 static void e1000_dump(struct e1000_adapter *adapter)
3324 /* this code doesn't handle multiple rings */
3325 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3326 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3329 if (!netif_msg_hw(adapter))
3332 /* Print Registers */
3333 e1000_regdump(adapter);
3336 pr_info("TX Desc ring0 dump\n");
3338 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3340 * Legacy Transmit Descriptor
3341 * +--------------------------------------------------------------+
3342 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3343 * +--------------------------------------------------------------+
3344 * 8 | Special | CSS | Status | CMD | CSO | Length |
3345 * +--------------------------------------------------------------+
3346 * 63 48 47 36 35 32 31 24 23 16 15 0
3348 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3349 * 63 48 47 40 39 32 31 16 15 8 7 0
3350 * +----------------------------------------------------------------+
3351 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3352 * +----------------------------------------------------------------+
3353 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3354 * +----------------------------------------------------------------+
3355 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3357 * Extended Data Descriptor (DTYP=0x1)
3358 * +----------------------------------------------------------------+
3359 * 0 | Buffer Address [63:0] |
3360 * +----------------------------------------------------------------+
3361 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3362 * +----------------------------------------------------------------+
3363 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3365 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3366 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3368 if (!netif_msg_tx_done(adapter))
3369 goto rx_ring_summary;
3371 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3372 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3373 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
3374 struct my_u { __le64 a; __le64 b; };
3375 struct my_u *u = (struct my_u *)tx_desc;
3378 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3380 else if (i == tx_ring->next_to_use)
3382 else if (i == tx_ring->next_to_clean)
3387 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3388 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3389 le64_to_cpu(u->a), le64_to_cpu(u->b),
3390 (u64)buffer_info->dma, buffer_info->length,
3391 buffer_info->next_to_watch,
3392 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3397 pr_info("\nRX Desc ring dump\n");
3399 /* Legacy Receive Descriptor Format
3401 * +-----------------------------------------------------+
3402 * | Buffer Address [63:0] |
3403 * +-----------------------------------------------------+
3404 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3405 * +-----------------------------------------------------+
3406 * 63 48 47 40 39 32 31 16 15 0
3408 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3410 if (!netif_msg_rx_status(adapter))
3413 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3414 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3415 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i];
3416 struct my_u { __le64 a; __le64 b; };
3417 struct my_u *u = (struct my_u *)rx_desc;
3420 if (i == rx_ring->next_to_use)
3422 else if (i == rx_ring->next_to_clean)
3427 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3428 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3429 (u64)buffer_info->dma, buffer_info->skb, type);
3432 /* dump the descriptor caches */
3434 pr_info("Rx descriptor cache in 64bit format\n");
3435 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3436 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3438 readl(adapter->hw.hw_addr + i+4),
3439 readl(adapter->hw.hw_addr + i),
3440 readl(adapter->hw.hw_addr + i+12),
3441 readl(adapter->hw.hw_addr + i+8));
3444 pr_info("Tx descriptor cache in 64bit format\n");
3445 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3446 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3448 readl(adapter->hw.hw_addr + i+4),
3449 readl(adapter->hw.hw_addr + i),
3450 readl(adapter->hw.hw_addr + i+12),
3451 readl(adapter->hw.hw_addr + i+8));
3458 * e1000_tx_timeout - Respond to a Tx Hang
3459 * @netdev: network interface device structure
3461 static void e1000_tx_timeout(struct net_device *netdev)
3463 struct e1000_adapter *adapter = netdev_priv(netdev);
3465 /* Do the reset outside of interrupt context */
3466 adapter->tx_timeout_count++;
3467 schedule_work(&adapter->reset_task);
3470 static void e1000_reset_task(struct work_struct *work)
3472 struct e1000_adapter *adapter =
3473 container_of(work, struct e1000_adapter, reset_task);
3475 e_err(drv, "Reset adapter\n");
3476 e1000_reinit_locked(adapter);
3480 * e1000_get_stats - Get System Network Statistics
3481 * @netdev: network interface device structure
3483 * Returns the address of the device statistics structure.
3484 * The statistics are actually updated from the watchdog.
3486 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3488 /* only return the current stats */
3489 return &netdev->stats;
3493 * e1000_change_mtu - Change the Maximum Transfer Unit
3494 * @netdev: network interface device structure
3495 * @new_mtu: new value for maximum frame size
3497 * Returns 0 on success, negative on failure
3499 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3501 struct e1000_adapter *adapter = netdev_priv(netdev);
3502 struct e1000_hw *hw = &adapter->hw;
3503 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3505 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3506 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3507 e_err(probe, "Invalid MTU setting\n");
3511 /* Adapter-specific max frame size limits. */
3512 switch (hw->mac_type) {
3513 case e1000_undefined ... e1000_82542_rev2_1:
3514 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3515 e_err(probe, "Jumbo Frames not supported.\n");
3520 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3524 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3526 /* e1000_down has a dependency on max_frame_size */
3527 hw->max_frame_size = max_frame;
3528 if (netif_running(netdev))
3529 e1000_down(adapter);
3531 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3532 * means we reserve 2 more, this pushes us to allocate from the next
3534 * i.e. RXBUFFER_2048 --> size-4096 slab
3535 * however with the new *_jumbo_rx* routines, jumbo receives will use
3539 if (max_frame <= E1000_RXBUFFER_2048)
3540 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3542 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3543 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3544 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3545 adapter->rx_buffer_len = PAGE_SIZE;
3548 /* adjust allocation if LPE protects us, and we aren't using SBP */
3549 if (!hw->tbi_compatibility_on &&
3550 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3551 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3552 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3554 pr_info("%s changing MTU from %d to %d\n",
3555 netdev->name, netdev->mtu, new_mtu);
3556 netdev->mtu = new_mtu;
3558 if (netif_running(netdev))
3561 e1000_reset(adapter);
3563 clear_bit(__E1000_RESETTING, &adapter->flags);
3569 * e1000_update_stats - Update the board statistics counters
3570 * @adapter: board private structure
3572 void e1000_update_stats(struct e1000_adapter *adapter)
3574 struct net_device *netdev = adapter->netdev;
3575 struct e1000_hw *hw = &adapter->hw;
3576 struct pci_dev *pdev = adapter->pdev;
3577 unsigned long flags;
3580 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3582 /* Prevent stats update while adapter is being reset, or if the pci
3583 * connection is down.
3585 if (adapter->link_speed == 0)
3587 if (pci_channel_offline(pdev))
3590 spin_lock_irqsave(&adapter->stats_lock, flags);
3592 /* these counters are modified from e1000_tbi_adjust_stats,
3593 * called from the interrupt context, so they must only
3594 * be written while holding adapter->stats_lock
3597 adapter->stats.crcerrs += er32(CRCERRS);
3598 adapter->stats.gprc += er32(GPRC);
3599 adapter->stats.gorcl += er32(GORCL);
3600 adapter->stats.gorch += er32(GORCH);
3601 adapter->stats.bprc += er32(BPRC);
3602 adapter->stats.mprc += er32(MPRC);
3603 adapter->stats.roc += er32(ROC);
3605 adapter->stats.prc64 += er32(PRC64);
3606 adapter->stats.prc127 += er32(PRC127);
3607 adapter->stats.prc255 += er32(PRC255);
3608 adapter->stats.prc511 += er32(PRC511);
3609 adapter->stats.prc1023 += er32(PRC1023);
3610 adapter->stats.prc1522 += er32(PRC1522);
3612 adapter->stats.symerrs += er32(SYMERRS);
3613 adapter->stats.mpc += er32(MPC);
3614 adapter->stats.scc += er32(SCC);
3615 adapter->stats.ecol += er32(ECOL);
3616 adapter->stats.mcc += er32(MCC);
3617 adapter->stats.latecol += er32(LATECOL);
3618 adapter->stats.dc += er32(DC);
3619 adapter->stats.sec += er32(SEC);
3620 adapter->stats.rlec += er32(RLEC);
3621 adapter->stats.xonrxc += er32(XONRXC);
3622 adapter->stats.xontxc += er32(XONTXC);
3623 adapter->stats.xoffrxc += er32(XOFFRXC);
3624 adapter->stats.xofftxc += er32(XOFFTXC);
3625 adapter->stats.fcruc += er32(FCRUC);
3626 adapter->stats.gptc += er32(GPTC);
3627 adapter->stats.gotcl += er32(GOTCL);
3628 adapter->stats.gotch += er32(GOTCH);
3629 adapter->stats.rnbc += er32(RNBC);
3630 adapter->stats.ruc += er32(RUC);
3631 adapter->stats.rfc += er32(RFC);
3632 adapter->stats.rjc += er32(RJC);
3633 adapter->stats.torl += er32(TORL);
3634 adapter->stats.torh += er32(TORH);
3635 adapter->stats.totl += er32(TOTL);
3636 adapter->stats.toth += er32(TOTH);
3637 adapter->stats.tpr += er32(TPR);
3639 adapter->stats.ptc64 += er32(PTC64);
3640 adapter->stats.ptc127 += er32(PTC127);
3641 adapter->stats.ptc255 += er32(PTC255);
3642 adapter->stats.ptc511 += er32(PTC511);
3643 adapter->stats.ptc1023 += er32(PTC1023);
3644 adapter->stats.ptc1522 += er32(PTC1522);
3646 adapter->stats.mptc += er32(MPTC);
3647 adapter->stats.bptc += er32(BPTC);
3649 /* used for adaptive IFS */
3651 hw->tx_packet_delta = er32(TPT);
3652 adapter->stats.tpt += hw->tx_packet_delta;
3653 hw->collision_delta = er32(COLC);
3654 adapter->stats.colc += hw->collision_delta;
3656 if (hw->mac_type >= e1000_82543) {
3657 adapter->stats.algnerrc += er32(ALGNERRC);
3658 adapter->stats.rxerrc += er32(RXERRC);
3659 adapter->stats.tncrs += er32(TNCRS);
3660 adapter->stats.cexterr += er32(CEXTERR);
3661 adapter->stats.tsctc += er32(TSCTC);
3662 adapter->stats.tsctfc += er32(TSCTFC);
3665 /* Fill out the OS statistics structure */
3666 netdev->stats.multicast = adapter->stats.mprc;
3667 netdev->stats.collisions = adapter->stats.colc;
3671 /* RLEC on some newer hardware can be incorrect so build
3672 * our own version based on RUC and ROC
3674 netdev->stats.rx_errors = adapter->stats.rxerrc +
3675 adapter->stats.crcerrs + adapter->stats.algnerrc +
3676 adapter->stats.ruc + adapter->stats.roc +
3677 adapter->stats.cexterr;
3678 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3679 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3680 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3681 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3682 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3685 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3686 netdev->stats.tx_errors = adapter->stats.txerrc;
3687 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3688 netdev->stats.tx_window_errors = adapter->stats.latecol;
3689 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3690 if (hw->bad_tx_carr_stats_fd &&
3691 adapter->link_duplex == FULL_DUPLEX) {
3692 netdev->stats.tx_carrier_errors = 0;
3693 adapter->stats.tncrs = 0;
3696 /* Tx Dropped needs to be maintained elsewhere */
3699 if (hw->media_type == e1000_media_type_copper) {
3700 if ((adapter->link_speed == SPEED_1000) &&
3701 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3702 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3703 adapter->phy_stats.idle_errors += phy_tmp;
3706 if ((hw->mac_type <= e1000_82546) &&
3707 (hw->phy_type == e1000_phy_m88) &&
3708 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3709 adapter->phy_stats.receive_errors += phy_tmp;
3712 /* Management Stats */
3713 if (hw->has_smbus) {
3714 adapter->stats.mgptc += er32(MGTPTC);
3715 adapter->stats.mgprc += er32(MGTPRC);
3716 adapter->stats.mgpdc += er32(MGTPDC);
3719 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3723 * e1000_intr - Interrupt Handler
3724 * @irq: interrupt number
3725 * @data: pointer to a network interface device structure
3727 static irqreturn_t e1000_intr(int irq, void *data)
3729 struct net_device *netdev = data;
3730 struct e1000_adapter *adapter = netdev_priv(netdev);
3731 struct e1000_hw *hw = &adapter->hw;
3732 u32 icr = er32(ICR);
3734 if (unlikely((!icr)))
3735 return IRQ_NONE; /* Not our interrupt */
3737 /* we might have caused the interrupt, but the above
3738 * read cleared it, and just in case the driver is
3739 * down there is nothing to do so return handled
3741 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3744 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3745 hw->get_link_status = 1;
3746 /* guard against interrupt when we're going down */
3747 if (!test_bit(__E1000_DOWN, &adapter->flags))
3748 schedule_delayed_work(&adapter->watchdog_task, 1);
3751 /* disable interrupts, without the synchronize_irq bit */
3753 E1000_WRITE_FLUSH();
3755 if (likely(napi_schedule_prep(&adapter->napi))) {
3756 adapter->total_tx_bytes = 0;
3757 adapter->total_tx_packets = 0;
3758 adapter->total_rx_bytes = 0;
3759 adapter->total_rx_packets = 0;
3760 __napi_schedule(&adapter->napi);
3762 /* this really should not happen! if it does it is basically a
3763 * bug, but not a hard error, so enable ints and continue
3765 if (!test_bit(__E1000_DOWN, &adapter->flags))
3766 e1000_irq_enable(adapter);
3773 * e1000_clean - NAPI Rx polling callback
3774 * @adapter: board private structure
3776 static int e1000_clean(struct napi_struct *napi, int budget)
3778 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
3780 int tx_clean_complete = 0, work_done = 0;
3782 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3784 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3786 if (!tx_clean_complete)
3789 /* If budget not fully consumed, exit the polling mode */
3790 if (work_done < budget) {
3791 if (likely(adapter->itr_setting & 3))
3792 e1000_set_itr(adapter);
3793 napi_complete(napi);
3794 if (!test_bit(__E1000_DOWN, &adapter->flags))
3795 e1000_irq_enable(adapter);
3802 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3803 * @adapter: board private structure
3805 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3806 struct e1000_tx_ring *tx_ring)
3808 struct e1000_hw *hw = &adapter->hw;
3809 struct net_device *netdev = adapter->netdev;
3810 struct e1000_tx_desc *tx_desc, *eop_desc;
3811 struct e1000_buffer *buffer_info;
3812 unsigned int i, eop;
3813 unsigned int count = 0;
3814 unsigned int total_tx_bytes=0, total_tx_packets=0;
3815 unsigned int bytes_compl = 0, pkts_compl = 0;
3817 i = tx_ring->next_to_clean;
3818 eop = tx_ring->buffer_info[i].next_to_watch;
3819 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3821 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3822 (count < tx_ring->count)) {
3823 bool cleaned = false;
3824 rmb(); /* read buffer_info after eop_desc */
3825 for ( ; !cleaned; count++) {
3826 tx_desc = E1000_TX_DESC(*tx_ring, i);
3827 buffer_info = &tx_ring->buffer_info[i];
3828 cleaned = (i == eop);
3831 total_tx_packets += buffer_info->segs;
3832 total_tx_bytes += buffer_info->bytecount;
3833 if (buffer_info->skb) {
3834 bytes_compl += buffer_info->skb->len;
3839 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3840 tx_desc->upper.data = 0;
3842 if (unlikely(++i == tx_ring->count)) i = 0;
3845 eop = tx_ring->buffer_info[i].next_to_watch;
3846 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3849 tx_ring->next_to_clean = i;
3851 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
3853 #define TX_WAKE_THRESHOLD 32
3854 if (unlikely(count && netif_carrier_ok(netdev) &&
3855 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3856 /* Make sure that anybody stopping the queue after this
3857 * sees the new next_to_clean.
3861 if (netif_queue_stopped(netdev) &&
3862 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3863 netif_wake_queue(netdev);
3864 ++adapter->restart_queue;
3868 if (adapter->detect_tx_hung) {
3869 /* Detect a transmit hang in hardware, this serializes the
3870 * check with the clearing of time_stamp and movement of i
3872 adapter->detect_tx_hung = false;
3873 if (tx_ring->buffer_info[eop].time_stamp &&
3874 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3875 (adapter->tx_timeout_factor * HZ)) &&
3876 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3878 /* detected Tx unit hang */
3879 e_err(drv, "Detected Tx Unit Hang\n"
3883 " next_to_use <%x>\n"
3884 " next_to_clean <%x>\n"
3885 "buffer_info[next_to_clean]\n"
3886 " time_stamp <%lx>\n"
3887 " next_to_watch <%x>\n"
3889 " next_to_watch.status <%x>\n",
3890 (unsigned long)(tx_ring - adapter->tx_ring),
3891 readl(hw->hw_addr + tx_ring->tdh),
3892 readl(hw->hw_addr + tx_ring->tdt),
3893 tx_ring->next_to_use,
3894 tx_ring->next_to_clean,
3895 tx_ring->buffer_info[eop].time_stamp,
3898 eop_desc->upper.fields.status);
3899 e1000_dump(adapter);
3900 netif_stop_queue(netdev);
3903 adapter->total_tx_bytes += total_tx_bytes;
3904 adapter->total_tx_packets += total_tx_packets;
3905 netdev->stats.tx_bytes += total_tx_bytes;
3906 netdev->stats.tx_packets += total_tx_packets;
3907 return count < tx_ring->count;
3911 * e1000_rx_checksum - Receive Checksum Offload for 82543
3912 * @adapter: board private structure
3913 * @status_err: receive descriptor status and error fields
3914 * @csum: receive descriptor csum field
3915 * @sk_buff: socket buffer with received data
3917 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3918 u32 csum, struct sk_buff *skb)
3920 struct e1000_hw *hw = &adapter->hw;
3921 u16 status = (u16)status_err;
3922 u8 errors = (u8)(status_err >> 24);
3924 skb_checksum_none_assert(skb);
3926 /* 82543 or newer only */
3927 if (unlikely(hw->mac_type < e1000_82543)) return;
3928 /* Ignore Checksum bit is set */
3929 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3930 /* TCP/UDP checksum error bit is set */
3931 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3932 /* let the stack verify checksum errors */
3933 adapter->hw_csum_err++;
3936 /* TCP/UDP Checksum has not been calculated */
3937 if (!(status & E1000_RXD_STAT_TCPCS))
3940 /* It must be a TCP or UDP packet with a valid checksum */
3941 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3942 /* TCP checksum is good */
3943 skb->ip_summed = CHECKSUM_UNNECESSARY;
3945 adapter->hw_csum_good++;
3949 * e1000_consume_page - helper function
3951 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3956 skb->data_len += length;
3957 skb->truesize += PAGE_SIZE;
3961 * e1000_receive_skb - helper function to handle rx indications
3962 * @adapter: board private structure
3963 * @status: descriptor status field as written by hardware
3964 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3965 * @skb: pointer to sk_buff to be indicated to stack
3967 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3968 __le16 vlan, struct sk_buff *skb)
3970 skb->protocol = eth_type_trans(skb, adapter->netdev);
3972 if (status & E1000_RXD_STAT_VP) {
3973 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
3975 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
3977 napi_gro_receive(&adapter->napi, skb);
3981 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3982 * @adapter: board private structure
3983 * @rx_ring: ring to clean
3984 * @work_done: amount of napi work completed this call
3985 * @work_to_do: max amount of work allowed for this call to do
3987 * the return value indicates whether actual cleaning was done, there
3988 * is no guarantee that everything was cleaned
3990 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
3991 struct e1000_rx_ring *rx_ring,
3992 int *work_done, int work_to_do)
3994 struct e1000_hw *hw = &adapter->hw;
3995 struct net_device *netdev = adapter->netdev;
3996 struct pci_dev *pdev = adapter->pdev;
3997 struct e1000_rx_desc *rx_desc, *next_rxd;
3998 struct e1000_buffer *buffer_info, *next_buffer;
3999 unsigned long irq_flags;
4002 int cleaned_count = 0;
4003 bool cleaned = false;
4004 unsigned int total_rx_bytes=0, total_rx_packets=0;
4006 i = rx_ring->next_to_clean;
4007 rx_desc = E1000_RX_DESC(*rx_ring, i);
4008 buffer_info = &rx_ring->buffer_info[i];
4010 while (rx_desc->status & E1000_RXD_STAT_DD) {
4011 struct sk_buff *skb;
4014 if (*work_done >= work_to_do)
4017 rmb(); /* read descriptor and rx_buffer_info after status DD */
4019 status = rx_desc->status;
4020 skb = buffer_info->skb;
4021 buffer_info->skb = NULL;
4023 if (++i == rx_ring->count) i = 0;
4024 next_rxd = E1000_RX_DESC(*rx_ring, i);
4027 next_buffer = &rx_ring->buffer_info[i];
4031 dma_unmap_page(&pdev->dev, buffer_info->dma,
4032 buffer_info->length, DMA_FROM_DEVICE);
4033 buffer_info->dma = 0;
4035 length = le16_to_cpu(rx_desc->length);
4037 /* errors is only valid for DD + EOP descriptors */
4038 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4039 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4043 mapped = page_address(buffer_info->page);
4044 last_byte = *(mapped + length - 1);
4045 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4047 spin_lock_irqsave(&adapter->stats_lock,
4049 e1000_tbi_adjust_stats(hw, &adapter->stats,
4051 spin_unlock_irqrestore(&adapter->stats_lock,
4055 if (netdev->features & NETIF_F_RXALL)
4057 /* recycle both page and skb */
4058 buffer_info->skb = skb;
4059 /* an error means any chain goes out the window
4062 if (rx_ring->rx_skb_top)
4063 dev_kfree_skb(rx_ring->rx_skb_top);
4064 rx_ring->rx_skb_top = NULL;
4069 #define rxtop rx_ring->rx_skb_top
4071 if (!(status & E1000_RXD_STAT_EOP)) {
4072 /* this descriptor is only the beginning (or middle) */
4074 /* this is the beginning of a chain */
4076 skb_fill_page_desc(rxtop, 0, buffer_info->page,
4079 /* this is the middle of a chain */
4080 skb_fill_page_desc(rxtop,
4081 skb_shinfo(rxtop)->nr_frags,
4082 buffer_info->page, 0, length);
4083 /* re-use the skb, only consumed the page */
4084 buffer_info->skb = skb;
4086 e1000_consume_page(buffer_info, rxtop, length);
4090 /* end of the chain */
4091 skb_fill_page_desc(rxtop,
4092 skb_shinfo(rxtop)->nr_frags,
4093 buffer_info->page, 0, length);
4094 /* re-use the current skb, we only consumed the
4097 buffer_info->skb = skb;
4100 e1000_consume_page(buffer_info, skb, length);
4102 /* no chain, got EOP, this buf is the packet
4103 * copybreak to save the put_page/alloc_page
4105 if (length <= copybreak &&
4106 skb_tailroom(skb) >= length) {
4108 vaddr = kmap_atomic(buffer_info->page);
4109 memcpy(skb_tail_pointer(skb), vaddr,
4111 kunmap_atomic(vaddr);
4112 /* re-use the page, so don't erase
4115 skb_put(skb, length);
4117 skb_fill_page_desc(skb, 0,
4118 buffer_info->page, 0,
4120 e1000_consume_page(buffer_info, skb,
4126 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4127 e1000_rx_checksum(adapter,
4129 ((u32)(rx_desc->errors) << 24),
4130 le16_to_cpu(rx_desc->csum), skb);
4132 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4133 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4134 pskb_trim(skb, skb->len - 4);
4137 /* eth type trans needs skb->data to point to something */
4138 if (!pskb_may_pull(skb, ETH_HLEN)) {
4139 e_err(drv, "pskb_may_pull failed.\n");
4144 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4147 rx_desc->status = 0;
4149 /* return some buffers to hardware, one at a time is too slow */
4150 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4151 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4155 /* use prefetched values */
4157 buffer_info = next_buffer;
4159 rx_ring->next_to_clean = i;
4161 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4163 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4165 adapter->total_rx_packets += total_rx_packets;
4166 adapter->total_rx_bytes += total_rx_bytes;
4167 netdev->stats.rx_bytes += total_rx_bytes;
4168 netdev->stats.rx_packets += total_rx_packets;
4172 /* this should improve performance for small packets with large amounts
4173 * of reassembly being done in the stack
4175 static void e1000_check_copybreak(struct net_device *netdev,
4176 struct e1000_buffer *buffer_info,
4177 u32 length, struct sk_buff **skb)
4179 struct sk_buff *new_skb;
4181 if (length > copybreak)
4184 new_skb = netdev_alloc_skb_ip_align(netdev, length);
4188 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
4189 (*skb)->data - NET_IP_ALIGN,
4190 length + NET_IP_ALIGN);
4191 /* save the skb in buffer_info as good */
4192 buffer_info->skb = *skb;
4197 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4198 * @adapter: board private structure
4199 * @rx_ring: ring to clean
4200 * @work_done: amount of napi work completed this call
4201 * @work_to_do: max amount of work allowed for this call to do
4203 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4204 struct e1000_rx_ring *rx_ring,
4205 int *work_done, int work_to_do)
4207 struct e1000_hw *hw = &adapter->hw;
4208 struct net_device *netdev = adapter->netdev;
4209 struct pci_dev *pdev = adapter->pdev;
4210 struct e1000_rx_desc *rx_desc, *next_rxd;
4211 struct e1000_buffer *buffer_info, *next_buffer;
4212 unsigned long flags;
4215 int cleaned_count = 0;
4216 bool cleaned = false;
4217 unsigned int total_rx_bytes=0, total_rx_packets=0;
4219 i = rx_ring->next_to_clean;
4220 rx_desc = E1000_RX_DESC(*rx_ring, i);
4221 buffer_info = &rx_ring->buffer_info[i];
4223 while (rx_desc->status & E1000_RXD_STAT_DD) {
4224 struct sk_buff *skb;
4227 if (*work_done >= work_to_do)
4230 rmb(); /* read descriptor and rx_buffer_info after status DD */
4232 status = rx_desc->status;
4233 skb = buffer_info->skb;
4234 buffer_info->skb = NULL;
4236 prefetch(skb->data - NET_IP_ALIGN);
4238 if (++i == rx_ring->count) i = 0;
4239 next_rxd = E1000_RX_DESC(*rx_ring, i);
4242 next_buffer = &rx_ring->buffer_info[i];
4246 dma_unmap_single(&pdev->dev, buffer_info->dma,
4247 buffer_info->length, DMA_FROM_DEVICE);
4248 buffer_info->dma = 0;
4250 length = le16_to_cpu(rx_desc->length);
4251 /* !EOP means multiple descriptors were used to store a single
4252 * packet, if thats the case we need to toss it. In fact, we
4253 * to toss every packet with the EOP bit clear and the next
4254 * frame that _does_ have the EOP bit set, as it is by
4255 * definition only a frame fragment
4257 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4258 adapter->discarding = true;
4260 if (adapter->discarding) {
4261 /* All receives must fit into a single buffer */
4262 e_dbg("Receive packet consumed multiple buffers\n");
4264 buffer_info->skb = skb;
4265 if (status & E1000_RXD_STAT_EOP)
4266 adapter->discarding = false;
4270 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4271 u8 last_byte = *(skb->data + length - 1);
4272 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4274 spin_lock_irqsave(&adapter->stats_lock, flags);
4275 e1000_tbi_adjust_stats(hw, &adapter->stats,
4277 spin_unlock_irqrestore(&adapter->stats_lock,
4281 if (netdev->features & NETIF_F_RXALL)
4284 buffer_info->skb = skb;
4290 total_rx_bytes += (length - 4); /* don't count FCS */
4293 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4294 /* adjust length to remove Ethernet CRC, this must be
4295 * done after the TBI_ACCEPT workaround above
4299 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4301 skb_put(skb, length);
4303 /* Receive Checksum Offload */
4304 e1000_rx_checksum(adapter,
4306 ((u32)(rx_desc->errors) << 24),
4307 le16_to_cpu(rx_desc->csum), skb);
4309 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4312 rx_desc->status = 0;
4314 /* return some buffers to hardware, one at a time is too slow */
4315 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4316 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4320 /* use prefetched values */
4322 buffer_info = next_buffer;
4324 rx_ring->next_to_clean = i;
4326 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4328 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4330 adapter->total_rx_packets += total_rx_packets;
4331 adapter->total_rx_bytes += total_rx_bytes;
4332 netdev->stats.rx_bytes += total_rx_bytes;
4333 netdev->stats.rx_packets += total_rx_packets;
4338 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4339 * @adapter: address of board private structure
4340 * @rx_ring: pointer to receive ring structure
4341 * @cleaned_count: number of buffers to allocate this pass
4344 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4345 struct e1000_rx_ring *rx_ring, int cleaned_count)
4347 struct net_device *netdev = adapter->netdev;
4348 struct pci_dev *pdev = adapter->pdev;
4349 struct e1000_rx_desc *rx_desc;
4350 struct e1000_buffer *buffer_info;
4351 struct sk_buff *skb;
4353 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4355 i = rx_ring->next_to_use;
4356 buffer_info = &rx_ring->buffer_info[i];
4358 while (cleaned_count--) {
4359 skb = buffer_info->skb;
4365 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4366 if (unlikely(!skb)) {
4367 /* Better luck next round */
4368 adapter->alloc_rx_buff_failed++;
4372 buffer_info->skb = skb;
4373 buffer_info->length = adapter->rx_buffer_len;
4375 /* allocate a new page if necessary */
4376 if (!buffer_info->page) {
4377 buffer_info->page = alloc_page(GFP_ATOMIC);
4378 if (unlikely(!buffer_info->page)) {
4379 adapter->alloc_rx_buff_failed++;
4384 if (!buffer_info->dma) {
4385 buffer_info->dma = dma_map_page(&pdev->dev,
4386 buffer_info->page, 0,
4387 buffer_info->length,
4389 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4390 put_page(buffer_info->page);
4392 buffer_info->page = NULL;
4393 buffer_info->skb = NULL;
4394 buffer_info->dma = 0;
4395 adapter->alloc_rx_buff_failed++;
4396 break; /* while !buffer_info->skb */
4400 rx_desc = E1000_RX_DESC(*rx_ring, i);
4401 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4403 if (unlikely(++i == rx_ring->count))
4405 buffer_info = &rx_ring->buffer_info[i];
4408 if (likely(rx_ring->next_to_use != i)) {
4409 rx_ring->next_to_use = i;
4410 if (unlikely(i-- == 0))
4411 i = (rx_ring->count - 1);
4413 /* Force memory writes to complete before letting h/w
4414 * know there are new descriptors to fetch. (Only
4415 * applicable for weak-ordered memory model archs,
4419 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4424 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4425 * @adapter: address of board private structure
4427 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4428 struct e1000_rx_ring *rx_ring,
4431 struct e1000_hw *hw = &adapter->hw;
4432 struct net_device *netdev = adapter->netdev;
4433 struct pci_dev *pdev = adapter->pdev;
4434 struct e1000_rx_desc *rx_desc;
4435 struct e1000_buffer *buffer_info;
4436 struct sk_buff *skb;
4438 unsigned int bufsz = adapter->rx_buffer_len;
4440 i = rx_ring->next_to_use;
4441 buffer_info = &rx_ring->buffer_info[i];
4443 while (cleaned_count--) {
4444 skb = buffer_info->skb;
4450 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4451 if (unlikely(!skb)) {
4452 /* Better luck next round */
4453 adapter->alloc_rx_buff_failed++;
4457 /* Fix for errata 23, can't cross 64kB boundary */
4458 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4459 struct sk_buff *oldskb = skb;
4460 e_err(rx_err, "skb align check failed: %u bytes at "
4461 "%p\n", bufsz, skb->data);
4462 /* Try again, without freeing the previous */
4463 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4464 /* Failed allocation, critical failure */
4466 dev_kfree_skb(oldskb);
4467 adapter->alloc_rx_buff_failed++;
4471 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4474 dev_kfree_skb(oldskb);
4475 adapter->alloc_rx_buff_failed++;
4476 break; /* while !buffer_info->skb */
4479 /* Use new allocation */
4480 dev_kfree_skb(oldskb);
4482 buffer_info->skb = skb;
4483 buffer_info->length = adapter->rx_buffer_len;
4485 buffer_info->dma = dma_map_single(&pdev->dev,
4487 buffer_info->length,
4489 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4491 buffer_info->skb = NULL;
4492 buffer_info->dma = 0;
4493 adapter->alloc_rx_buff_failed++;
4494 break; /* while !buffer_info->skb */
4497 /* XXX if it was allocated cleanly it will never map to a
4501 /* Fix for errata 23, can't cross 64kB boundary */
4502 if (!e1000_check_64k_bound(adapter,
4503 (void *)(unsigned long)buffer_info->dma,
4504 adapter->rx_buffer_len)) {
4505 e_err(rx_err, "dma align check failed: %u bytes at "
4506 "%p\n", adapter->rx_buffer_len,
4507 (void *)(unsigned long)buffer_info->dma);
4509 buffer_info->skb = NULL;
4511 dma_unmap_single(&pdev->dev, buffer_info->dma,
4512 adapter->rx_buffer_len,
4514 buffer_info->dma = 0;
4516 adapter->alloc_rx_buff_failed++;
4517 break; /* while !buffer_info->skb */
4519 rx_desc = E1000_RX_DESC(*rx_ring, i);
4520 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4522 if (unlikely(++i == rx_ring->count))
4524 buffer_info = &rx_ring->buffer_info[i];
4527 if (likely(rx_ring->next_to_use != i)) {
4528 rx_ring->next_to_use = i;
4529 if (unlikely(i-- == 0))
4530 i = (rx_ring->count - 1);
4532 /* Force memory writes to complete before letting h/w
4533 * know there are new descriptors to fetch. (Only
4534 * applicable for weak-ordered memory model archs,
4538 writel(i, hw->hw_addr + rx_ring->rdt);
4543 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4546 static void e1000_smartspeed(struct e1000_adapter *adapter)
4548 struct e1000_hw *hw = &adapter->hw;
4552 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4553 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4556 if (adapter->smartspeed == 0) {
4557 /* If Master/Slave config fault is asserted twice,
4558 * we assume back-to-back
4560 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4561 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4562 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4563 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4564 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4565 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4566 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4567 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4569 adapter->smartspeed++;
4570 if (!e1000_phy_setup_autoneg(hw) &&
4571 !e1000_read_phy_reg(hw, PHY_CTRL,
4573 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4574 MII_CR_RESTART_AUTO_NEG);
4575 e1000_write_phy_reg(hw, PHY_CTRL,
4580 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4581 /* If still no link, perhaps using 2/3 pair cable */
4582 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4583 phy_ctrl |= CR_1000T_MS_ENABLE;
4584 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4585 if (!e1000_phy_setup_autoneg(hw) &&
4586 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4587 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4588 MII_CR_RESTART_AUTO_NEG);
4589 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4592 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4593 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4594 adapter->smartspeed = 0;
4603 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4609 return e1000_mii_ioctl(netdev, ifr, cmd);
4621 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4624 struct e1000_adapter *adapter = netdev_priv(netdev);
4625 struct e1000_hw *hw = &adapter->hw;
4626 struct mii_ioctl_data *data = if_mii(ifr);
4629 unsigned long flags;
4631 if (hw->media_type != e1000_media_type_copper)
4636 data->phy_id = hw->phy_addr;
4639 spin_lock_irqsave(&adapter->stats_lock, flags);
4640 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4642 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4645 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4648 if (data->reg_num & ~(0x1F))
4650 mii_reg = data->val_in;
4651 spin_lock_irqsave(&adapter->stats_lock, flags);
4652 if (e1000_write_phy_reg(hw, data->reg_num,
4654 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4657 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4658 if (hw->media_type == e1000_media_type_copper) {
4659 switch (data->reg_num) {
4661 if (mii_reg & MII_CR_POWER_DOWN)
4663 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4665 hw->autoneg_advertised = 0x2F;
4670 else if (mii_reg & 0x2000)
4674 retval = e1000_set_spd_dplx(
4682 if (netif_running(adapter->netdev))
4683 e1000_reinit_locked(adapter);
4685 e1000_reset(adapter);
4687 case M88E1000_PHY_SPEC_CTRL:
4688 case M88E1000_EXT_PHY_SPEC_CTRL:
4689 if (e1000_phy_reset(hw))
4694 switch (data->reg_num) {
4696 if (mii_reg & MII_CR_POWER_DOWN)
4698 if (netif_running(adapter->netdev))
4699 e1000_reinit_locked(adapter);
4701 e1000_reset(adapter);
4709 return E1000_SUCCESS;
4712 void e1000_pci_set_mwi(struct e1000_hw *hw)
4714 struct e1000_adapter *adapter = hw->back;
4715 int ret_val = pci_set_mwi(adapter->pdev);
4718 e_err(probe, "Error in setting MWI\n");
4721 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4723 struct e1000_adapter *adapter = hw->back;
4725 pci_clear_mwi(adapter->pdev);
4728 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4730 struct e1000_adapter *adapter = hw->back;
4731 return pcix_get_mmrbc(adapter->pdev);
4734 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4736 struct e1000_adapter *adapter = hw->back;
4737 pcix_set_mmrbc(adapter->pdev, mmrbc);
4740 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4745 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4749 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4754 static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4755 netdev_features_t features)
4757 struct e1000_hw *hw = &adapter->hw;
4761 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
4762 /* enable VLAN tag insert/strip */
4763 ctrl |= E1000_CTRL_VME;
4765 /* disable VLAN tag insert/strip */
4766 ctrl &= ~E1000_CTRL_VME;
4770 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4773 struct e1000_hw *hw = &adapter->hw;
4776 if (!test_bit(__E1000_DOWN, &adapter->flags))
4777 e1000_irq_disable(adapter);
4779 __e1000_vlan_mode(adapter, adapter->netdev->features);
4781 /* enable VLAN receive filtering */
4783 rctl &= ~E1000_RCTL_CFIEN;
4784 if (!(adapter->netdev->flags & IFF_PROMISC))
4785 rctl |= E1000_RCTL_VFE;
4787 e1000_update_mng_vlan(adapter);
4789 /* disable VLAN receive filtering */
4791 rctl &= ~E1000_RCTL_VFE;
4795 if (!test_bit(__E1000_DOWN, &adapter->flags))
4796 e1000_irq_enable(adapter);
4799 static void e1000_vlan_mode(struct net_device *netdev,
4800 netdev_features_t features)
4802 struct e1000_adapter *adapter = netdev_priv(netdev);
4804 if (!test_bit(__E1000_DOWN, &adapter->flags))
4805 e1000_irq_disable(adapter);
4807 __e1000_vlan_mode(adapter, features);
4809 if (!test_bit(__E1000_DOWN, &adapter->flags))
4810 e1000_irq_enable(adapter);
4813 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
4814 __be16 proto, u16 vid)
4816 struct e1000_adapter *adapter = netdev_priv(netdev);
4817 struct e1000_hw *hw = &adapter->hw;
4820 if ((hw->mng_cookie.status &
4821 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4822 (vid == adapter->mng_vlan_id))
4825 if (!e1000_vlan_used(adapter))
4826 e1000_vlan_filter_on_off(adapter, true);
4828 /* add VID to filter table */
4829 index = (vid >> 5) & 0x7F;
4830 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4831 vfta |= (1 << (vid & 0x1F));
4832 e1000_write_vfta(hw, index, vfta);
4834 set_bit(vid, adapter->active_vlans);
4839 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
4840 __be16 proto, u16 vid)
4842 struct e1000_adapter *adapter = netdev_priv(netdev);
4843 struct e1000_hw *hw = &adapter->hw;
4846 if (!test_bit(__E1000_DOWN, &adapter->flags))
4847 e1000_irq_disable(adapter);
4848 if (!test_bit(__E1000_DOWN, &adapter->flags))
4849 e1000_irq_enable(adapter);
4851 /* remove VID from filter table */
4852 index = (vid >> 5) & 0x7F;
4853 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4854 vfta &= ~(1 << (vid & 0x1F));
4855 e1000_write_vfta(hw, index, vfta);
4857 clear_bit(vid, adapter->active_vlans);
4859 if (!e1000_vlan_used(adapter))
4860 e1000_vlan_filter_on_off(adapter, false);
4865 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4869 if (!e1000_vlan_used(adapter))
4872 e1000_vlan_filter_on_off(adapter, true);
4873 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4874 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
4877 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4879 struct e1000_hw *hw = &adapter->hw;
4883 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4884 * for the switch() below to work
4886 if ((spd & 1) || (dplx & ~1))
4889 /* Fiber NICs only allow 1000 gbps Full duplex */
4890 if ((hw->media_type == e1000_media_type_fiber) &&
4891 spd != SPEED_1000 &&
4892 dplx != DUPLEX_FULL)
4895 switch (spd + dplx) {
4896 case SPEED_10 + DUPLEX_HALF:
4897 hw->forced_speed_duplex = e1000_10_half;
4899 case SPEED_10 + DUPLEX_FULL:
4900 hw->forced_speed_duplex = e1000_10_full;
4902 case SPEED_100 + DUPLEX_HALF:
4903 hw->forced_speed_duplex = e1000_100_half;
4905 case SPEED_100 + DUPLEX_FULL:
4906 hw->forced_speed_duplex = e1000_100_full;
4908 case SPEED_1000 + DUPLEX_FULL:
4910 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4912 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4917 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
4918 hw->mdix = AUTO_ALL_MODES;
4923 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4927 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4929 struct net_device *netdev = pci_get_drvdata(pdev);
4930 struct e1000_adapter *adapter = netdev_priv(netdev);
4931 struct e1000_hw *hw = &adapter->hw;
4932 u32 ctrl, ctrl_ext, rctl, status;
4933 u32 wufc = adapter->wol;
4938 netif_device_detach(netdev);
4940 if (netif_running(netdev)) {
4941 int count = E1000_CHECK_RESET_COUNT;
4943 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
4944 usleep_range(10000, 20000);
4946 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4947 e1000_down(adapter);
4951 retval = pci_save_state(pdev);
4956 status = er32(STATUS);
4957 if (status & E1000_STATUS_LU)
4958 wufc &= ~E1000_WUFC_LNKC;
4961 e1000_setup_rctl(adapter);
4962 e1000_set_rx_mode(netdev);
4966 /* turn on all-multi mode if wake on multicast is enabled */
4967 if (wufc & E1000_WUFC_MC)
4968 rctl |= E1000_RCTL_MPE;
4970 /* enable receives in the hardware */
4971 ew32(RCTL, rctl | E1000_RCTL_EN);
4973 if (hw->mac_type >= e1000_82540) {
4975 /* advertise wake from D3Cold */
4976 #define E1000_CTRL_ADVD3WUC 0x00100000
4977 /* phy power management enable */
4978 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4979 ctrl |= E1000_CTRL_ADVD3WUC |
4980 E1000_CTRL_EN_PHY_PWR_MGMT;
4984 if (hw->media_type == e1000_media_type_fiber ||
4985 hw->media_type == e1000_media_type_internal_serdes) {
4986 /* keep the laser running in D3 */
4987 ctrl_ext = er32(CTRL_EXT);
4988 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4989 ew32(CTRL_EXT, ctrl_ext);
4992 ew32(WUC, E1000_WUC_PME_EN);
4999 e1000_release_manageability(adapter);
5001 *enable_wake = !!wufc;
5003 /* make sure adapter isn't asleep if manageability is enabled */
5004 if (adapter->en_mng_pt)
5005 *enable_wake = true;
5007 if (netif_running(netdev))
5008 e1000_free_irq(adapter);
5010 pci_disable_device(pdev);
5016 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5021 retval = __e1000_shutdown(pdev, &wake);
5026 pci_prepare_to_sleep(pdev);
5028 pci_wake_from_d3(pdev, false);
5029 pci_set_power_state(pdev, PCI_D3hot);
5035 static int e1000_resume(struct pci_dev *pdev)
5037 struct net_device *netdev = pci_get_drvdata(pdev);
5038 struct e1000_adapter *adapter = netdev_priv(netdev);
5039 struct e1000_hw *hw = &adapter->hw;
5042 pci_set_power_state(pdev, PCI_D0);
5043 pci_restore_state(pdev);
5044 pci_save_state(pdev);
5046 if (adapter->need_ioport)
5047 err = pci_enable_device(pdev);
5049 err = pci_enable_device_mem(pdev);
5051 pr_err("Cannot enable PCI device from suspend\n");
5054 pci_set_master(pdev);
5056 pci_enable_wake(pdev, PCI_D3hot, 0);
5057 pci_enable_wake(pdev, PCI_D3cold, 0);
5059 if (netif_running(netdev)) {
5060 err = e1000_request_irq(adapter);
5065 e1000_power_up_phy(adapter);
5066 e1000_reset(adapter);
5069 e1000_init_manageability(adapter);
5071 if (netif_running(netdev))
5074 netif_device_attach(netdev);
5080 static void e1000_shutdown(struct pci_dev *pdev)
5084 __e1000_shutdown(pdev, &wake);
5086 if (system_state == SYSTEM_POWER_OFF) {
5087 pci_wake_from_d3(pdev, wake);
5088 pci_set_power_state(pdev, PCI_D3hot);
5092 #ifdef CONFIG_NET_POLL_CONTROLLER
5093 /* Polling 'interrupt' - used by things like netconsole to send skbs
5094 * without having to re-enable interrupts. It's not called while
5095 * the interrupt routine is executing.
5097 static void e1000_netpoll(struct net_device *netdev)
5099 struct e1000_adapter *adapter = netdev_priv(netdev);
5101 disable_irq(adapter->pdev->irq);
5102 e1000_intr(adapter->pdev->irq, netdev);
5103 enable_irq(adapter->pdev->irq);
5108 * e1000_io_error_detected - called when PCI error is detected
5109 * @pdev: Pointer to PCI device
5110 * @state: The current pci connection state
5112 * This function is called after a PCI bus error affecting
5113 * this device has been detected.
5115 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5116 pci_channel_state_t state)
5118 struct net_device *netdev = pci_get_drvdata(pdev);
5119 struct e1000_adapter *adapter = netdev_priv(netdev);
5121 netif_device_detach(netdev);
5123 if (state == pci_channel_io_perm_failure)
5124 return PCI_ERS_RESULT_DISCONNECT;
5126 if (netif_running(netdev))
5127 e1000_down(adapter);
5128 pci_disable_device(pdev);
5130 /* Request a slot slot reset. */
5131 return PCI_ERS_RESULT_NEED_RESET;
5135 * e1000_io_slot_reset - called after the pci bus has been reset.
5136 * @pdev: Pointer to PCI device
5138 * Restart the card from scratch, as if from a cold-boot. Implementation
5139 * resembles the first-half of the e1000_resume routine.
5141 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5143 struct net_device *netdev = pci_get_drvdata(pdev);
5144 struct e1000_adapter *adapter = netdev_priv(netdev);
5145 struct e1000_hw *hw = &adapter->hw;
5148 if (adapter->need_ioport)
5149 err = pci_enable_device(pdev);
5151 err = pci_enable_device_mem(pdev);
5153 pr_err("Cannot re-enable PCI device after reset.\n");
5154 return PCI_ERS_RESULT_DISCONNECT;
5156 pci_set_master(pdev);
5158 pci_enable_wake(pdev, PCI_D3hot, 0);
5159 pci_enable_wake(pdev, PCI_D3cold, 0);
5161 e1000_reset(adapter);
5164 return PCI_ERS_RESULT_RECOVERED;
5168 * e1000_io_resume - called when traffic can start flowing again.
5169 * @pdev: Pointer to PCI device
5171 * This callback is called when the error recovery driver tells us that
5172 * its OK to resume normal operation. Implementation resembles the
5173 * second-half of the e1000_resume routine.
5175 static void e1000_io_resume(struct pci_dev *pdev)
5177 struct net_device *netdev = pci_get_drvdata(pdev);
5178 struct e1000_adapter *adapter = netdev_priv(netdev);
5180 e1000_init_manageability(adapter);
5182 if (netif_running(netdev)) {
5183 if (e1000_up(adapter)) {
5184 pr_info("can't bring device back up after reset\n");
5189 netif_device_attach(netdev);