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 /* Only kill reset task if adapter is not resetting */
498 if (!test_bit(__E1000_RESETTING, &adapter->flags))
499 cancel_work_sync(&adapter->reset_task);
501 cancel_delayed_work_sync(&adapter->watchdog_task);
502 cancel_delayed_work_sync(&adapter->phy_info_task);
503 cancel_delayed_work_sync(&adapter->fifo_stall_task);
506 void e1000_down(struct e1000_adapter *adapter)
508 struct e1000_hw *hw = &adapter->hw;
509 struct net_device *netdev = adapter->netdev;
513 /* disable receives in the hardware */
515 ew32(RCTL, rctl & ~E1000_RCTL_EN);
516 /* flush and sleep below */
518 netif_tx_disable(netdev);
520 /* disable transmits in the hardware */
522 tctl &= ~E1000_TCTL_EN;
524 /* flush both disables and wait for them to finish */
528 napi_disable(&adapter->napi);
530 e1000_irq_disable(adapter);
532 /* Setting DOWN must be after irq_disable to prevent
533 * a screaming interrupt. Setting DOWN also prevents
534 * tasks from rescheduling.
536 e1000_down_and_stop(adapter);
538 adapter->link_speed = 0;
539 adapter->link_duplex = 0;
540 netif_carrier_off(netdev);
542 e1000_reset(adapter);
543 e1000_clean_all_tx_rings(adapter);
544 e1000_clean_all_rx_rings(adapter);
547 static void e1000_reinit_safe(struct e1000_adapter *adapter)
549 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
551 mutex_lock(&adapter->mutex);
554 mutex_unlock(&adapter->mutex);
555 clear_bit(__E1000_RESETTING, &adapter->flags);
558 void e1000_reinit_locked(struct e1000_adapter *adapter)
560 /* if rtnl_lock is not held the call path is bogus */
562 WARN_ON(in_interrupt());
563 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
567 clear_bit(__E1000_RESETTING, &adapter->flags);
570 void e1000_reset(struct e1000_adapter *adapter)
572 struct e1000_hw *hw = &adapter->hw;
573 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
574 bool legacy_pba_adjust = false;
577 /* Repartition Pba for greater than 9k mtu
578 * To take effect CTRL.RST is required.
581 switch (hw->mac_type) {
582 case e1000_82542_rev2_0:
583 case e1000_82542_rev2_1:
588 case e1000_82541_rev_2:
589 legacy_pba_adjust = true;
593 case e1000_82545_rev_3:
596 case e1000_82546_rev_3:
600 case e1000_82547_rev_2:
601 legacy_pba_adjust = true;
604 case e1000_undefined:
609 if (legacy_pba_adjust) {
610 if (hw->max_frame_size > E1000_RXBUFFER_8192)
611 pba -= 8; /* allocate more FIFO for Tx */
613 if (hw->mac_type == e1000_82547) {
614 adapter->tx_fifo_head = 0;
615 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
616 adapter->tx_fifo_size =
617 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
618 atomic_set(&adapter->tx_fifo_stall, 0);
620 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
621 /* adjust PBA for jumbo frames */
624 /* To maintain wire speed transmits, the Tx FIFO should be
625 * large enough to accommodate two full transmit packets,
626 * rounded up to the next 1KB and expressed in KB. Likewise,
627 * the Rx FIFO should be large enough to accommodate at least
628 * one full receive packet and is similarly rounded up and
632 /* upper 16 bits has Tx packet buffer allocation size in KB */
633 tx_space = pba >> 16;
634 /* lower 16 bits has Rx packet buffer allocation size in KB */
636 /* the Tx fifo also stores 16 bytes of information about the Tx
637 * but don't include ethernet FCS because hardware appends it
639 min_tx_space = (hw->max_frame_size +
640 sizeof(struct e1000_tx_desc) -
642 min_tx_space = ALIGN(min_tx_space, 1024);
644 /* software strips receive CRC, so leave room for it */
645 min_rx_space = hw->max_frame_size;
646 min_rx_space = ALIGN(min_rx_space, 1024);
649 /* If current Tx allocation is less than the min Tx FIFO size,
650 * and the min Tx FIFO size is less than the current Rx FIFO
651 * allocation, take space away from current Rx allocation
653 if (tx_space < min_tx_space &&
654 ((min_tx_space - tx_space) < pba)) {
655 pba = pba - (min_tx_space - tx_space);
657 /* PCI/PCIx hardware has PBA alignment constraints */
658 switch (hw->mac_type) {
659 case e1000_82545 ... e1000_82546_rev_3:
660 pba &= ~(E1000_PBA_8K - 1);
666 /* if short on Rx space, Rx wins and must trump Tx
667 * adjustment or use Early Receive if available
669 if (pba < min_rx_space)
676 /* flow control settings:
677 * The high water mark must be low enough to fit one full frame
678 * (or the size used for early receive) above it in the Rx FIFO.
679 * Set it to the lower of:
680 * - 90% of the Rx FIFO size, and
681 * - the full Rx FIFO size minus the early receive size (for parts
682 * with ERT support assuming ERT set to E1000_ERT_2048), or
683 * - the full Rx FIFO size minus one full frame
685 hwm = min(((pba << 10) * 9 / 10),
686 ((pba << 10) - hw->max_frame_size));
688 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
689 hw->fc_low_water = hw->fc_high_water - 8;
690 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
692 hw->fc = hw->original_fc;
694 /* Allow time for pending master requests to run */
696 if (hw->mac_type >= e1000_82544)
699 if (e1000_init_hw(hw))
700 e_dev_err("Hardware Error\n");
701 e1000_update_mng_vlan(adapter);
703 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
704 if (hw->mac_type >= e1000_82544 &&
706 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
707 u32 ctrl = er32(CTRL);
708 /* clear phy power management bit if we are in gig only mode,
709 * which if enabled will attempt negotiation to 100Mb, which
710 * can cause a loss of link at power off or driver unload
712 ctrl &= ~E1000_CTRL_SWDPIN3;
716 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
717 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
719 e1000_reset_adaptive(hw);
720 e1000_phy_get_info(hw, &adapter->phy_info);
722 e1000_release_manageability(adapter);
725 /* Dump the eeprom for users having checksum issues */
726 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
728 struct net_device *netdev = adapter->netdev;
729 struct ethtool_eeprom eeprom;
730 const struct ethtool_ops *ops = netdev->ethtool_ops;
733 u16 csum_old, csum_new = 0;
735 eeprom.len = ops->get_eeprom_len(netdev);
738 data = kmalloc(eeprom.len, GFP_KERNEL);
742 ops->get_eeprom(netdev, &eeprom, data);
744 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
745 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
746 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
747 csum_new += data[i] + (data[i + 1] << 8);
748 csum_new = EEPROM_SUM - csum_new;
750 pr_err("/*********************/\n");
751 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
752 pr_err("Calculated : 0x%04x\n", csum_new);
754 pr_err("Offset Values\n");
755 pr_err("======== ======\n");
756 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
758 pr_err("Include this output when contacting your support provider.\n");
759 pr_err("This is not a software error! Something bad happened to\n");
760 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
761 pr_err("result in further problems, possibly loss of data,\n");
762 pr_err("corruption or system hangs!\n");
763 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
764 pr_err("which is invalid and requires you to set the proper MAC\n");
765 pr_err("address manually before continuing to enable this network\n");
766 pr_err("device. Please inspect the EEPROM dump and report the\n");
767 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
768 pr_err("/*********************/\n");
774 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
775 * @pdev: PCI device information struct
777 * Return true if an adapter needs ioport resources
779 static int e1000_is_need_ioport(struct pci_dev *pdev)
781 switch (pdev->device) {
782 case E1000_DEV_ID_82540EM:
783 case E1000_DEV_ID_82540EM_LOM:
784 case E1000_DEV_ID_82540EP:
785 case E1000_DEV_ID_82540EP_LOM:
786 case E1000_DEV_ID_82540EP_LP:
787 case E1000_DEV_ID_82541EI:
788 case E1000_DEV_ID_82541EI_MOBILE:
789 case E1000_DEV_ID_82541ER:
790 case E1000_DEV_ID_82541ER_LOM:
791 case E1000_DEV_ID_82541GI:
792 case E1000_DEV_ID_82541GI_LF:
793 case E1000_DEV_ID_82541GI_MOBILE:
794 case E1000_DEV_ID_82544EI_COPPER:
795 case E1000_DEV_ID_82544EI_FIBER:
796 case E1000_DEV_ID_82544GC_COPPER:
797 case E1000_DEV_ID_82544GC_LOM:
798 case E1000_DEV_ID_82545EM_COPPER:
799 case E1000_DEV_ID_82545EM_FIBER:
800 case E1000_DEV_ID_82546EB_COPPER:
801 case E1000_DEV_ID_82546EB_FIBER:
802 case E1000_DEV_ID_82546EB_QUAD_COPPER:
809 static netdev_features_t e1000_fix_features(struct net_device *netdev,
810 netdev_features_t features)
812 /* Since there is no support for separate Rx/Tx vlan accel
813 * enable/disable make sure Tx flag is always in same state as Rx.
815 if (features & NETIF_F_HW_VLAN_CTAG_RX)
816 features |= NETIF_F_HW_VLAN_CTAG_TX;
818 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
823 static int e1000_set_features(struct net_device *netdev,
824 netdev_features_t features)
826 struct e1000_adapter *adapter = netdev_priv(netdev);
827 netdev_features_t changed = features ^ netdev->features;
829 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
830 e1000_vlan_mode(netdev, features);
832 if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL)))
835 netdev->features = features;
836 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
838 if (netif_running(netdev))
839 e1000_reinit_locked(adapter);
841 e1000_reset(adapter);
846 static const struct net_device_ops e1000_netdev_ops = {
847 .ndo_open = e1000_open,
848 .ndo_stop = e1000_close,
849 .ndo_start_xmit = e1000_xmit_frame,
850 .ndo_get_stats = e1000_get_stats,
851 .ndo_set_rx_mode = e1000_set_rx_mode,
852 .ndo_set_mac_address = e1000_set_mac,
853 .ndo_tx_timeout = e1000_tx_timeout,
854 .ndo_change_mtu = e1000_change_mtu,
855 .ndo_do_ioctl = e1000_ioctl,
856 .ndo_validate_addr = eth_validate_addr,
857 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
858 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
859 #ifdef CONFIG_NET_POLL_CONTROLLER
860 .ndo_poll_controller = e1000_netpoll,
862 .ndo_fix_features = e1000_fix_features,
863 .ndo_set_features = e1000_set_features,
867 * e1000_init_hw_struct - initialize members of hw struct
868 * @adapter: board private struct
869 * @hw: structure used by e1000_hw.c
871 * Factors out initialization of the e1000_hw struct to its own function
872 * that can be called very early at init (just after struct allocation).
873 * Fields are initialized based on PCI device information and
874 * OS network device settings (MTU size).
875 * Returns negative error codes if MAC type setup fails.
877 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
880 struct pci_dev *pdev = adapter->pdev;
882 /* PCI config space info */
883 hw->vendor_id = pdev->vendor;
884 hw->device_id = pdev->device;
885 hw->subsystem_vendor_id = pdev->subsystem_vendor;
886 hw->subsystem_id = pdev->subsystem_device;
887 hw->revision_id = pdev->revision;
889 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
891 hw->max_frame_size = adapter->netdev->mtu +
892 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
893 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
895 /* identify the MAC */
896 if (e1000_set_mac_type(hw)) {
897 e_err(probe, "Unknown MAC Type\n");
901 switch (hw->mac_type) {
906 case e1000_82541_rev_2:
907 case e1000_82547_rev_2:
908 hw->phy_init_script = 1;
912 e1000_set_media_type(hw);
913 e1000_get_bus_info(hw);
915 hw->wait_autoneg_complete = false;
916 hw->tbi_compatibility_en = true;
917 hw->adaptive_ifs = true;
921 if (hw->media_type == e1000_media_type_copper) {
922 hw->mdix = AUTO_ALL_MODES;
923 hw->disable_polarity_correction = false;
924 hw->master_slave = E1000_MASTER_SLAVE;
931 * e1000_probe - Device Initialization Routine
932 * @pdev: PCI device information struct
933 * @ent: entry in e1000_pci_tbl
935 * Returns 0 on success, negative on failure
937 * e1000_probe initializes an adapter identified by a pci_dev structure.
938 * The OS initialization, configuring of the adapter private structure,
939 * and a hardware reset occur.
941 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
943 struct net_device *netdev;
944 struct e1000_adapter *adapter;
947 static int cards_found = 0;
948 static int global_quad_port_a = 0; /* global ksp3 port a indication */
949 int i, err, pci_using_dac;
952 u16 eeprom_apme_mask = E1000_EEPROM_APME;
953 int bars, need_ioport;
955 /* do not allocate ioport bars when not needed */
956 need_ioport = e1000_is_need_ioport(pdev);
958 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
959 err = pci_enable_device(pdev);
961 bars = pci_select_bars(pdev, IORESOURCE_MEM);
962 err = pci_enable_device_mem(pdev);
967 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
971 pci_set_master(pdev);
972 err = pci_save_state(pdev);
974 goto err_alloc_etherdev;
977 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
979 goto err_alloc_etherdev;
981 SET_NETDEV_DEV(netdev, &pdev->dev);
983 pci_set_drvdata(pdev, netdev);
984 adapter = netdev_priv(netdev);
985 adapter->netdev = netdev;
986 adapter->pdev = pdev;
987 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
988 adapter->bars = bars;
989 adapter->need_ioport = need_ioport;
995 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
999 if (adapter->need_ioport) {
1000 for (i = BAR_1; i <= BAR_5; i++) {
1001 if (pci_resource_len(pdev, i) == 0)
1003 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1004 hw->io_base = pci_resource_start(pdev, i);
1010 /* make ready for any if (hw->...) below */
1011 err = e1000_init_hw_struct(adapter, hw);
1015 /* there is a workaround being applied below that limits
1016 * 64-bit DMA addresses to 64-bit hardware. There are some
1017 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1020 if ((hw->bus_type == e1000_bus_type_pcix) &&
1021 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
1022 /* according to DMA-API-HOWTO, coherent calls will always
1023 * succeed if the set call did
1025 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
1028 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1030 pr_err("No usable DMA config, aborting\n");
1033 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1036 netdev->netdev_ops = &e1000_netdev_ops;
1037 e1000_set_ethtool_ops(netdev);
1038 netdev->watchdog_timeo = 5 * HZ;
1039 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1041 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1043 adapter->bd_number = cards_found;
1045 /* setup the private structure */
1047 err = e1000_sw_init(adapter);
1052 if (hw->mac_type == e1000_ce4100) {
1053 hw->ce4100_gbe_mdio_base_virt =
1054 ioremap(pci_resource_start(pdev, BAR_1),
1055 pci_resource_len(pdev, BAR_1));
1057 if (!hw->ce4100_gbe_mdio_base_virt)
1058 goto err_mdio_ioremap;
1061 if (hw->mac_type >= e1000_82543) {
1062 netdev->hw_features = NETIF_F_SG |
1064 NETIF_F_HW_VLAN_CTAG_RX;
1065 netdev->features = NETIF_F_HW_VLAN_CTAG_TX |
1066 NETIF_F_HW_VLAN_CTAG_FILTER;
1069 if ((hw->mac_type >= e1000_82544) &&
1070 (hw->mac_type != e1000_82547))
1071 netdev->hw_features |= NETIF_F_TSO;
1073 netdev->priv_flags |= IFF_SUPP_NOFCS;
1075 netdev->features |= netdev->hw_features;
1076 netdev->hw_features |= (NETIF_F_RXCSUM |
1080 if (pci_using_dac) {
1081 netdev->features |= NETIF_F_HIGHDMA;
1082 netdev->vlan_features |= NETIF_F_HIGHDMA;
1085 netdev->vlan_features |= (NETIF_F_TSO |
1089 netdev->priv_flags |= IFF_UNICAST_FLT;
1091 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1093 /* initialize eeprom parameters */
1094 if (e1000_init_eeprom_params(hw)) {
1095 e_err(probe, "EEPROM initialization failed\n");
1099 /* before reading the EEPROM, reset the controller to
1100 * put the device in a known good starting state
1105 /* make sure the EEPROM is good */
1106 if (e1000_validate_eeprom_checksum(hw) < 0) {
1107 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1108 e1000_dump_eeprom(adapter);
1109 /* set MAC address to all zeroes to invalidate and temporary
1110 * disable this device for the user. This blocks regular
1111 * traffic while still permitting ethtool ioctls from reaching
1112 * the hardware as well as allowing the user to run the
1113 * interface after manually setting a hw addr using
1116 memset(hw->mac_addr, 0, netdev->addr_len);
1118 /* copy the MAC address out of the EEPROM */
1119 if (e1000_read_mac_addr(hw))
1120 e_err(probe, "EEPROM Read Error\n");
1122 /* don't block initalization here due to bad MAC address */
1123 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1125 if (!is_valid_ether_addr(netdev->dev_addr))
1126 e_err(probe, "Invalid MAC Address\n");
1129 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1130 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1131 e1000_82547_tx_fifo_stall_task);
1132 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1133 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1135 e1000_check_options(adapter);
1137 /* Initial Wake on LAN setting
1138 * If APM wake is enabled in the EEPROM,
1139 * enable the ACPI Magic Packet filter
1142 switch (hw->mac_type) {
1143 case e1000_82542_rev2_0:
1144 case e1000_82542_rev2_1:
1148 e1000_read_eeprom(hw,
1149 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1150 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1153 case e1000_82546_rev_3:
1154 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1155 e1000_read_eeprom(hw,
1156 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1161 e1000_read_eeprom(hw,
1162 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1165 if (eeprom_data & eeprom_apme_mask)
1166 adapter->eeprom_wol |= E1000_WUFC_MAG;
1168 /* now that we have the eeprom settings, apply the special cases
1169 * where the eeprom may be wrong or the board simply won't support
1170 * wake on lan on a particular port
1172 switch (pdev->device) {
1173 case E1000_DEV_ID_82546GB_PCIE:
1174 adapter->eeprom_wol = 0;
1176 case E1000_DEV_ID_82546EB_FIBER:
1177 case E1000_DEV_ID_82546GB_FIBER:
1178 /* Wake events only supported on port A for dual fiber
1179 * regardless of eeprom setting
1181 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1182 adapter->eeprom_wol = 0;
1184 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1185 /* if quad port adapter, disable WoL on all but port A */
1186 if (global_quad_port_a != 0)
1187 adapter->eeprom_wol = 0;
1189 adapter->quad_port_a = true;
1190 /* Reset for multiple quad port adapters */
1191 if (++global_quad_port_a == 4)
1192 global_quad_port_a = 0;
1196 /* initialize the wol settings based on the eeprom settings */
1197 adapter->wol = adapter->eeprom_wol;
1198 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1200 /* Auto detect PHY address */
1201 if (hw->mac_type == e1000_ce4100) {
1202 for (i = 0; i < 32; i++) {
1204 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1205 if (tmp == 0 || tmp == 0xFF) {
1214 /* reset the hardware with the new settings */
1215 e1000_reset(adapter);
1217 strcpy(netdev->name, "eth%d");
1218 err = register_netdev(netdev);
1222 e1000_vlan_filter_on_off(adapter, false);
1224 /* print bus type/speed/width info */
1225 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1226 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1227 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1228 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1229 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1230 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1231 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1234 /* carrier off reporting is important to ethtool even BEFORE open */
1235 netif_carrier_off(netdev);
1237 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1244 e1000_phy_hw_reset(hw);
1246 if (hw->flash_address)
1247 iounmap(hw->flash_address);
1248 kfree(adapter->tx_ring);
1249 kfree(adapter->rx_ring);
1253 iounmap(hw->ce4100_gbe_mdio_base_virt);
1254 iounmap(hw->hw_addr);
1256 free_netdev(netdev);
1258 pci_release_selected_regions(pdev, bars);
1260 pci_disable_device(pdev);
1265 * e1000_remove - Device Removal Routine
1266 * @pdev: PCI device information struct
1268 * e1000_remove is called by the PCI subsystem to alert the driver
1269 * that it should release a PCI device. The could be caused by a
1270 * Hot-Plug event, or because the driver is going to be removed from
1273 static void e1000_remove(struct pci_dev *pdev)
1275 struct net_device *netdev = pci_get_drvdata(pdev);
1276 struct e1000_adapter *adapter = netdev_priv(netdev);
1277 struct e1000_hw *hw = &adapter->hw;
1279 e1000_down_and_stop(adapter);
1280 e1000_release_manageability(adapter);
1282 unregister_netdev(netdev);
1284 e1000_phy_hw_reset(hw);
1286 kfree(adapter->tx_ring);
1287 kfree(adapter->rx_ring);
1289 if (hw->mac_type == e1000_ce4100)
1290 iounmap(hw->ce4100_gbe_mdio_base_virt);
1291 iounmap(hw->hw_addr);
1292 if (hw->flash_address)
1293 iounmap(hw->flash_address);
1294 pci_release_selected_regions(pdev, adapter->bars);
1296 free_netdev(netdev);
1298 pci_disable_device(pdev);
1302 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1303 * @adapter: board private structure to initialize
1305 * e1000_sw_init initializes the Adapter private data structure.
1306 * e1000_init_hw_struct MUST be called before this function
1308 static int e1000_sw_init(struct e1000_adapter *adapter)
1310 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1312 adapter->num_tx_queues = 1;
1313 adapter->num_rx_queues = 1;
1315 if (e1000_alloc_queues(adapter)) {
1316 e_err(probe, "Unable to allocate memory for queues\n");
1320 /* Explicitly disable IRQ since the NIC can be in any state. */
1321 e1000_irq_disable(adapter);
1323 spin_lock_init(&adapter->stats_lock);
1324 mutex_init(&adapter->mutex);
1326 set_bit(__E1000_DOWN, &adapter->flags);
1332 * e1000_alloc_queues - Allocate memory for all rings
1333 * @adapter: board private structure to initialize
1335 * We allocate one ring per queue at run-time since we don't know the
1336 * number of queues at compile-time.
1338 static int e1000_alloc_queues(struct e1000_adapter *adapter)
1340 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1341 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1342 if (!adapter->tx_ring)
1345 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1346 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1347 if (!adapter->rx_ring) {
1348 kfree(adapter->tx_ring);
1352 return E1000_SUCCESS;
1356 * e1000_open - Called when a network interface is made active
1357 * @netdev: network interface device structure
1359 * Returns 0 on success, negative value on failure
1361 * The open entry point is called when a network interface is made
1362 * active by the system (IFF_UP). At this point all resources needed
1363 * for transmit and receive operations are allocated, the interrupt
1364 * handler is registered with the OS, the watchdog task is started,
1365 * and the stack is notified that the interface is ready.
1367 static int e1000_open(struct net_device *netdev)
1369 struct e1000_adapter *adapter = netdev_priv(netdev);
1370 struct e1000_hw *hw = &adapter->hw;
1373 /* disallow open during test */
1374 if (test_bit(__E1000_TESTING, &adapter->flags))
1377 netif_carrier_off(netdev);
1379 /* allocate transmit descriptors */
1380 err = e1000_setup_all_tx_resources(adapter);
1384 /* allocate receive descriptors */
1385 err = e1000_setup_all_rx_resources(adapter);
1389 e1000_power_up_phy(adapter);
1391 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1392 if ((hw->mng_cookie.status &
1393 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1394 e1000_update_mng_vlan(adapter);
1397 /* before we allocate an interrupt, we must be ready to handle it.
1398 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1399 * as soon as we call pci_request_irq, so we have to setup our
1400 * clean_rx handler before we do so.
1402 e1000_configure(adapter);
1404 err = e1000_request_irq(adapter);
1408 /* From here on the code is the same as e1000_up() */
1409 clear_bit(__E1000_DOWN, &adapter->flags);
1411 napi_enable(&adapter->napi);
1413 e1000_irq_enable(adapter);
1415 netif_start_queue(netdev);
1417 /* fire a link status change interrupt to start the watchdog */
1418 ew32(ICS, E1000_ICS_LSC);
1420 return E1000_SUCCESS;
1423 e1000_power_down_phy(adapter);
1424 e1000_free_all_rx_resources(adapter);
1426 e1000_free_all_tx_resources(adapter);
1428 e1000_reset(adapter);
1434 * e1000_close - Disables a network interface
1435 * @netdev: network interface device structure
1437 * Returns 0, this is not allowed to fail
1439 * The close entry point is called when an interface is de-activated
1440 * by the OS. The hardware is still under the drivers control, but
1441 * needs to be disabled. A global MAC reset is issued to stop the
1442 * hardware, and all transmit and receive resources are freed.
1444 static int e1000_close(struct net_device *netdev)
1446 struct e1000_adapter *adapter = netdev_priv(netdev);
1447 struct e1000_hw *hw = &adapter->hw;
1449 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1450 e1000_down(adapter);
1451 e1000_power_down_phy(adapter);
1452 e1000_free_irq(adapter);
1454 e1000_free_all_tx_resources(adapter);
1455 e1000_free_all_rx_resources(adapter);
1457 /* kill manageability vlan ID if supported, but not if a vlan with
1458 * the same ID is registered on the host OS (let 8021q kill it)
1460 if ((hw->mng_cookie.status &
1461 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1462 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1463 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
1464 adapter->mng_vlan_id);
1471 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1472 * @adapter: address of board private structure
1473 * @start: address of beginning of memory
1474 * @len: length of memory
1476 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1479 struct e1000_hw *hw = &adapter->hw;
1480 unsigned long begin = (unsigned long)start;
1481 unsigned long end = begin + len;
1483 /* First rev 82545 and 82546 need to not allow any memory
1484 * write location to cross 64k boundary due to errata 23
1486 if (hw->mac_type == e1000_82545 ||
1487 hw->mac_type == e1000_ce4100 ||
1488 hw->mac_type == e1000_82546) {
1489 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1496 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1497 * @adapter: board private structure
1498 * @txdr: tx descriptor ring (for a specific queue) to setup
1500 * Return 0 on success, negative on failure
1502 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1503 struct e1000_tx_ring *txdr)
1505 struct pci_dev *pdev = adapter->pdev;
1508 size = sizeof(struct e1000_buffer) * txdr->count;
1509 txdr->buffer_info = vzalloc(size);
1510 if (!txdr->buffer_info)
1513 /* round up to nearest 4K */
1515 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1516 txdr->size = ALIGN(txdr->size, 4096);
1518 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1522 vfree(txdr->buffer_info);
1526 /* Fix for errata 23, can't cross 64kB boundary */
1527 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1528 void *olddesc = txdr->desc;
1529 dma_addr_t olddma = txdr->dma;
1530 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1531 txdr->size, txdr->desc);
1532 /* Try again, without freeing the previous */
1533 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1534 &txdr->dma, GFP_KERNEL);
1535 /* Failed allocation, critical failure */
1537 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1539 goto setup_tx_desc_die;
1542 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1544 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1546 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1548 e_err(probe, "Unable to allocate aligned memory "
1549 "for the transmit descriptor ring\n");
1550 vfree(txdr->buffer_info);
1553 /* Free old allocation, new allocation was successful */
1554 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1558 memset(txdr->desc, 0, txdr->size);
1560 txdr->next_to_use = 0;
1561 txdr->next_to_clean = 0;
1567 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1568 * (Descriptors) for all queues
1569 * @adapter: board private structure
1571 * Return 0 on success, negative on failure
1573 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1577 for (i = 0; i < adapter->num_tx_queues; i++) {
1578 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1580 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1581 for (i-- ; i >= 0; i--)
1582 e1000_free_tx_resources(adapter,
1583 &adapter->tx_ring[i]);
1592 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1593 * @adapter: board private structure
1595 * Configure the Tx unit of the MAC after a reset.
1597 static void e1000_configure_tx(struct e1000_adapter *adapter)
1600 struct e1000_hw *hw = &adapter->hw;
1601 u32 tdlen, tctl, tipg;
1604 /* Setup the HW Tx Head and Tail descriptor pointers */
1606 switch (adapter->num_tx_queues) {
1609 tdba = adapter->tx_ring[0].dma;
1610 tdlen = adapter->tx_ring[0].count *
1611 sizeof(struct e1000_tx_desc);
1613 ew32(TDBAH, (tdba >> 32));
1614 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1617 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ?
1618 E1000_TDH : E1000_82542_TDH);
1619 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ?
1620 E1000_TDT : E1000_82542_TDT);
1624 /* Set the default values for the Tx Inter Packet Gap timer */
1625 if ((hw->media_type == e1000_media_type_fiber ||
1626 hw->media_type == e1000_media_type_internal_serdes))
1627 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1629 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1631 switch (hw->mac_type) {
1632 case e1000_82542_rev2_0:
1633 case e1000_82542_rev2_1:
1634 tipg = DEFAULT_82542_TIPG_IPGT;
1635 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1636 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1639 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1640 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1643 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1644 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1647 /* Set the Tx Interrupt Delay register */
1649 ew32(TIDV, adapter->tx_int_delay);
1650 if (hw->mac_type >= e1000_82540)
1651 ew32(TADV, adapter->tx_abs_int_delay);
1653 /* Program the Transmit Control Register */
1656 tctl &= ~E1000_TCTL_CT;
1657 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1658 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1660 e1000_config_collision_dist(hw);
1662 /* Setup Transmit Descriptor Settings for eop descriptor */
1663 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1665 /* only set IDE if we are delaying interrupts using the timers */
1666 if (adapter->tx_int_delay)
1667 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1669 if (hw->mac_type < e1000_82543)
1670 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1672 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1674 /* Cache if we're 82544 running in PCI-X because we'll
1675 * need this to apply a workaround later in the send path.
1677 if (hw->mac_type == e1000_82544 &&
1678 hw->bus_type == e1000_bus_type_pcix)
1679 adapter->pcix_82544 = true;
1686 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1687 * @adapter: board private structure
1688 * @rxdr: rx descriptor ring (for a specific queue) to setup
1690 * Returns 0 on success, negative on failure
1692 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1693 struct e1000_rx_ring *rxdr)
1695 struct pci_dev *pdev = adapter->pdev;
1698 size = sizeof(struct e1000_buffer) * rxdr->count;
1699 rxdr->buffer_info = vzalloc(size);
1700 if (!rxdr->buffer_info)
1703 desc_len = sizeof(struct e1000_rx_desc);
1705 /* Round up to nearest 4K */
1707 rxdr->size = rxdr->count * desc_len;
1708 rxdr->size = ALIGN(rxdr->size, 4096);
1710 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1714 vfree(rxdr->buffer_info);
1718 /* Fix for errata 23, can't cross 64kB boundary */
1719 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1720 void *olddesc = rxdr->desc;
1721 dma_addr_t olddma = rxdr->dma;
1722 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1723 rxdr->size, rxdr->desc);
1724 /* Try again, without freeing the previous */
1725 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1726 &rxdr->dma, GFP_KERNEL);
1727 /* Failed allocation, critical failure */
1729 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1731 goto setup_rx_desc_die;
1734 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1736 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1738 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1740 e_err(probe, "Unable to allocate aligned memory for "
1741 "the Rx descriptor ring\n");
1742 goto setup_rx_desc_die;
1744 /* Free old allocation, new allocation was successful */
1745 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1749 memset(rxdr->desc, 0, rxdr->size);
1751 rxdr->next_to_clean = 0;
1752 rxdr->next_to_use = 0;
1753 rxdr->rx_skb_top = NULL;
1759 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1760 * (Descriptors) for all queues
1761 * @adapter: board private structure
1763 * Return 0 on success, negative on failure
1765 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1769 for (i = 0; i < adapter->num_rx_queues; i++) {
1770 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1772 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1773 for (i-- ; i >= 0; i--)
1774 e1000_free_rx_resources(adapter,
1775 &adapter->rx_ring[i]);
1784 * e1000_setup_rctl - configure the receive control registers
1785 * @adapter: Board private structure
1787 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1789 struct e1000_hw *hw = &adapter->hw;
1794 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1796 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1797 E1000_RCTL_RDMTS_HALF |
1798 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1800 if (hw->tbi_compatibility_on == 1)
1801 rctl |= E1000_RCTL_SBP;
1803 rctl &= ~E1000_RCTL_SBP;
1805 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1806 rctl &= ~E1000_RCTL_LPE;
1808 rctl |= E1000_RCTL_LPE;
1810 /* Setup buffer sizes */
1811 rctl &= ~E1000_RCTL_SZ_4096;
1812 rctl |= E1000_RCTL_BSEX;
1813 switch (adapter->rx_buffer_len) {
1814 case E1000_RXBUFFER_2048:
1816 rctl |= E1000_RCTL_SZ_2048;
1817 rctl &= ~E1000_RCTL_BSEX;
1819 case E1000_RXBUFFER_4096:
1820 rctl |= E1000_RCTL_SZ_4096;
1822 case E1000_RXBUFFER_8192:
1823 rctl |= E1000_RCTL_SZ_8192;
1825 case E1000_RXBUFFER_16384:
1826 rctl |= E1000_RCTL_SZ_16384;
1830 /* This is useful for sniffing bad packets. */
1831 if (adapter->netdev->features & NETIF_F_RXALL) {
1832 /* UPE and MPE will be handled by normal PROMISC logic
1833 * in e1000e_set_rx_mode
1835 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
1836 E1000_RCTL_BAM | /* RX All Bcast Pkts */
1837 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
1839 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
1840 E1000_RCTL_DPF | /* Allow filtered pause */
1841 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
1842 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1843 * and that breaks VLANs.
1851 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1852 * @adapter: board private structure
1854 * Configure the Rx unit of the MAC after a reset.
1856 static void e1000_configure_rx(struct e1000_adapter *adapter)
1859 struct e1000_hw *hw = &adapter->hw;
1860 u32 rdlen, rctl, rxcsum;
1862 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1863 rdlen = adapter->rx_ring[0].count *
1864 sizeof(struct e1000_rx_desc);
1865 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1866 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1868 rdlen = adapter->rx_ring[0].count *
1869 sizeof(struct e1000_rx_desc);
1870 adapter->clean_rx = e1000_clean_rx_irq;
1871 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1874 /* disable receives while setting up the descriptors */
1876 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1878 /* set the Receive Delay Timer Register */
1879 ew32(RDTR, adapter->rx_int_delay);
1881 if (hw->mac_type >= e1000_82540) {
1882 ew32(RADV, adapter->rx_abs_int_delay);
1883 if (adapter->itr_setting != 0)
1884 ew32(ITR, 1000000000 / (adapter->itr * 256));
1887 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1888 * the Base and Length of the Rx Descriptor Ring
1890 switch (adapter->num_rx_queues) {
1893 rdba = adapter->rx_ring[0].dma;
1895 ew32(RDBAH, (rdba >> 32));
1896 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1899 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ?
1900 E1000_RDH : E1000_82542_RDH);
1901 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ?
1902 E1000_RDT : E1000_82542_RDT);
1906 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1907 if (hw->mac_type >= e1000_82543) {
1908 rxcsum = er32(RXCSUM);
1909 if (adapter->rx_csum)
1910 rxcsum |= E1000_RXCSUM_TUOFL;
1912 /* don't need to clear IPPCSE as it defaults to 0 */
1913 rxcsum &= ~E1000_RXCSUM_TUOFL;
1914 ew32(RXCSUM, rxcsum);
1917 /* Enable Receives */
1918 ew32(RCTL, rctl | E1000_RCTL_EN);
1922 * e1000_free_tx_resources - Free Tx Resources per Queue
1923 * @adapter: board private structure
1924 * @tx_ring: Tx descriptor ring for a specific queue
1926 * Free all transmit software resources
1928 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1929 struct e1000_tx_ring *tx_ring)
1931 struct pci_dev *pdev = adapter->pdev;
1933 e1000_clean_tx_ring(adapter, tx_ring);
1935 vfree(tx_ring->buffer_info);
1936 tx_ring->buffer_info = NULL;
1938 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1941 tx_ring->desc = NULL;
1945 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1946 * @adapter: board private structure
1948 * Free all transmit software resources
1950 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1954 for (i = 0; i < adapter->num_tx_queues; i++)
1955 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1958 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1959 struct e1000_buffer *buffer_info)
1961 if (buffer_info->dma) {
1962 if (buffer_info->mapped_as_page)
1963 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1964 buffer_info->length, DMA_TO_DEVICE);
1966 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1967 buffer_info->length,
1969 buffer_info->dma = 0;
1971 if (buffer_info->skb) {
1972 dev_kfree_skb_any(buffer_info->skb);
1973 buffer_info->skb = NULL;
1975 buffer_info->time_stamp = 0;
1976 /* buffer_info must be completely set up in the transmit path */
1980 * e1000_clean_tx_ring - Free Tx Buffers
1981 * @adapter: board private structure
1982 * @tx_ring: ring to be cleaned
1984 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1985 struct e1000_tx_ring *tx_ring)
1987 struct e1000_hw *hw = &adapter->hw;
1988 struct e1000_buffer *buffer_info;
1992 /* Free all the Tx ring sk_buffs */
1994 for (i = 0; i < tx_ring->count; i++) {
1995 buffer_info = &tx_ring->buffer_info[i];
1996 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1999 netdev_reset_queue(adapter->netdev);
2000 size = sizeof(struct e1000_buffer) * tx_ring->count;
2001 memset(tx_ring->buffer_info, 0, size);
2003 /* Zero out the descriptor ring */
2005 memset(tx_ring->desc, 0, tx_ring->size);
2007 tx_ring->next_to_use = 0;
2008 tx_ring->next_to_clean = 0;
2009 tx_ring->last_tx_tso = false;
2011 writel(0, hw->hw_addr + tx_ring->tdh);
2012 writel(0, hw->hw_addr + tx_ring->tdt);
2016 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2017 * @adapter: board private structure
2019 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2023 for (i = 0; i < adapter->num_tx_queues; i++)
2024 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2028 * e1000_free_rx_resources - Free Rx Resources
2029 * @adapter: board private structure
2030 * @rx_ring: ring to clean the resources from
2032 * Free all receive software resources
2034 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2035 struct e1000_rx_ring *rx_ring)
2037 struct pci_dev *pdev = adapter->pdev;
2039 e1000_clean_rx_ring(adapter, rx_ring);
2041 vfree(rx_ring->buffer_info);
2042 rx_ring->buffer_info = NULL;
2044 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2047 rx_ring->desc = NULL;
2051 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2052 * @adapter: board private structure
2054 * Free all receive software resources
2056 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2060 for (i = 0; i < adapter->num_rx_queues; i++)
2061 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2065 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2066 * @adapter: board private structure
2067 * @rx_ring: ring to free buffers from
2069 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2070 struct e1000_rx_ring *rx_ring)
2072 struct e1000_hw *hw = &adapter->hw;
2073 struct e1000_buffer *buffer_info;
2074 struct pci_dev *pdev = adapter->pdev;
2078 /* Free all the Rx ring sk_buffs */
2079 for (i = 0; i < rx_ring->count; i++) {
2080 buffer_info = &rx_ring->buffer_info[i];
2081 if (buffer_info->dma &&
2082 adapter->clean_rx == e1000_clean_rx_irq) {
2083 dma_unmap_single(&pdev->dev, buffer_info->dma,
2084 buffer_info->length,
2086 } else if (buffer_info->dma &&
2087 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2088 dma_unmap_page(&pdev->dev, buffer_info->dma,
2089 buffer_info->length,
2093 buffer_info->dma = 0;
2094 if (buffer_info->page) {
2095 put_page(buffer_info->page);
2096 buffer_info->page = NULL;
2098 if (buffer_info->skb) {
2099 dev_kfree_skb(buffer_info->skb);
2100 buffer_info->skb = NULL;
2104 /* there also may be some cached data from a chained receive */
2105 if (rx_ring->rx_skb_top) {
2106 dev_kfree_skb(rx_ring->rx_skb_top);
2107 rx_ring->rx_skb_top = NULL;
2110 size = sizeof(struct e1000_buffer) * rx_ring->count;
2111 memset(rx_ring->buffer_info, 0, size);
2113 /* Zero out the descriptor ring */
2114 memset(rx_ring->desc, 0, rx_ring->size);
2116 rx_ring->next_to_clean = 0;
2117 rx_ring->next_to_use = 0;
2119 writel(0, hw->hw_addr + rx_ring->rdh);
2120 writel(0, hw->hw_addr + rx_ring->rdt);
2124 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2125 * @adapter: board private structure
2127 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2131 for (i = 0; i < adapter->num_rx_queues; i++)
2132 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2135 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2136 * and memory write and invalidate disabled for certain operations
2138 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2140 struct e1000_hw *hw = &adapter->hw;
2141 struct net_device *netdev = adapter->netdev;
2144 e1000_pci_clear_mwi(hw);
2147 rctl |= E1000_RCTL_RST;
2149 E1000_WRITE_FLUSH();
2152 if (netif_running(netdev))
2153 e1000_clean_all_rx_rings(adapter);
2156 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2158 struct e1000_hw *hw = &adapter->hw;
2159 struct net_device *netdev = adapter->netdev;
2163 rctl &= ~E1000_RCTL_RST;
2165 E1000_WRITE_FLUSH();
2168 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2169 e1000_pci_set_mwi(hw);
2171 if (netif_running(netdev)) {
2172 /* No need to loop, because 82542 supports only 1 queue */
2173 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2174 e1000_configure_rx(adapter);
2175 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2180 * e1000_set_mac - Change the Ethernet Address of the NIC
2181 * @netdev: network interface device structure
2182 * @p: pointer to an address structure
2184 * Returns 0 on success, negative on failure
2186 static int e1000_set_mac(struct net_device *netdev, void *p)
2188 struct e1000_adapter *adapter = netdev_priv(netdev);
2189 struct e1000_hw *hw = &adapter->hw;
2190 struct sockaddr *addr = p;
2192 if (!is_valid_ether_addr(addr->sa_data))
2193 return -EADDRNOTAVAIL;
2195 /* 82542 2.0 needs to be in reset to write receive address registers */
2197 if (hw->mac_type == e1000_82542_rev2_0)
2198 e1000_enter_82542_rst(adapter);
2200 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2201 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2203 e1000_rar_set(hw, hw->mac_addr, 0);
2205 if (hw->mac_type == e1000_82542_rev2_0)
2206 e1000_leave_82542_rst(adapter);
2212 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2213 * @netdev: network interface device structure
2215 * The set_rx_mode entry point is called whenever the unicast or multicast
2216 * address lists or the network interface flags are updated. This routine is
2217 * responsible for configuring the hardware for proper unicast, multicast,
2218 * promiscuous mode, and all-multi behavior.
2220 static void e1000_set_rx_mode(struct net_device *netdev)
2222 struct e1000_adapter *adapter = netdev_priv(netdev);
2223 struct e1000_hw *hw = &adapter->hw;
2224 struct netdev_hw_addr *ha;
2225 bool use_uc = false;
2228 int i, rar_entries = E1000_RAR_ENTRIES;
2229 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2230 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2235 /* Check for Promiscuous and All Multicast modes */
2239 if (netdev->flags & IFF_PROMISC) {
2240 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2241 rctl &= ~E1000_RCTL_VFE;
2243 if (netdev->flags & IFF_ALLMULTI)
2244 rctl |= E1000_RCTL_MPE;
2246 rctl &= ~E1000_RCTL_MPE;
2247 /* Enable VLAN filter if there is a VLAN */
2248 if (e1000_vlan_used(adapter))
2249 rctl |= E1000_RCTL_VFE;
2252 if (netdev_uc_count(netdev) > rar_entries - 1) {
2253 rctl |= E1000_RCTL_UPE;
2254 } else if (!(netdev->flags & IFF_PROMISC)) {
2255 rctl &= ~E1000_RCTL_UPE;
2261 /* 82542 2.0 needs to be in reset to write receive address registers */
2263 if (hw->mac_type == e1000_82542_rev2_0)
2264 e1000_enter_82542_rst(adapter);
2266 /* load the first 14 addresses into the exact filters 1-14. Unicast
2267 * addresses take precedence to avoid disabling unicast filtering
2270 * RAR 0 is used for the station MAC address
2271 * if there are not 14 addresses, go ahead and clear the filters
2275 netdev_for_each_uc_addr(ha, netdev) {
2276 if (i == rar_entries)
2278 e1000_rar_set(hw, ha->addr, i++);
2281 netdev_for_each_mc_addr(ha, netdev) {
2282 if (i == rar_entries) {
2283 /* load any remaining addresses into the hash table */
2284 u32 hash_reg, hash_bit, mta;
2285 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2286 hash_reg = (hash_value >> 5) & 0x7F;
2287 hash_bit = hash_value & 0x1F;
2288 mta = (1 << hash_bit);
2289 mcarray[hash_reg] |= mta;
2291 e1000_rar_set(hw, ha->addr, i++);
2295 for (; i < rar_entries; i++) {
2296 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2297 E1000_WRITE_FLUSH();
2298 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2299 E1000_WRITE_FLUSH();
2302 /* write the hash table completely, write from bottom to avoid
2303 * both stupid write combining chipsets, and flushing each write
2305 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2306 /* If we are on an 82544 has an errata where writing odd
2307 * offsets overwrites the previous even offset, but writing
2308 * backwards over the range solves the issue by always
2309 * writing the odd offset first
2311 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2313 E1000_WRITE_FLUSH();
2315 if (hw->mac_type == e1000_82542_rev2_0)
2316 e1000_leave_82542_rst(adapter);
2322 * e1000_update_phy_info_task - get phy info
2323 * @work: work struct contained inside adapter struct
2325 * Need to wait a few seconds after link up to get diagnostic information from
2328 static void e1000_update_phy_info_task(struct work_struct *work)
2330 struct e1000_adapter *adapter = container_of(work,
2331 struct e1000_adapter,
2332 phy_info_task.work);
2333 if (test_bit(__E1000_DOWN, &adapter->flags))
2335 mutex_lock(&adapter->mutex);
2336 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2337 mutex_unlock(&adapter->mutex);
2341 * e1000_82547_tx_fifo_stall_task - task to complete work
2342 * @work: work struct contained inside adapter struct
2344 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2346 struct e1000_adapter *adapter = container_of(work,
2347 struct e1000_adapter,
2348 fifo_stall_task.work);
2349 struct e1000_hw *hw = &adapter->hw;
2350 struct net_device *netdev = adapter->netdev;
2353 if (test_bit(__E1000_DOWN, &adapter->flags))
2355 mutex_lock(&adapter->mutex);
2356 if (atomic_read(&adapter->tx_fifo_stall)) {
2357 if ((er32(TDT) == er32(TDH)) &&
2358 (er32(TDFT) == er32(TDFH)) &&
2359 (er32(TDFTS) == er32(TDFHS))) {
2361 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2362 ew32(TDFT, adapter->tx_head_addr);
2363 ew32(TDFH, adapter->tx_head_addr);
2364 ew32(TDFTS, adapter->tx_head_addr);
2365 ew32(TDFHS, adapter->tx_head_addr);
2367 E1000_WRITE_FLUSH();
2369 adapter->tx_fifo_head = 0;
2370 atomic_set(&adapter->tx_fifo_stall, 0);
2371 netif_wake_queue(netdev);
2372 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2373 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2376 mutex_unlock(&adapter->mutex);
2379 bool e1000_has_link(struct e1000_adapter *adapter)
2381 struct e1000_hw *hw = &adapter->hw;
2382 bool link_active = false;
2384 /* get_link_status is set on LSC (link status) interrupt or rx
2385 * sequence error interrupt (except on intel ce4100).
2386 * get_link_status will stay false until the
2387 * e1000_check_for_link establishes link for copper adapters
2390 switch (hw->media_type) {
2391 case e1000_media_type_copper:
2392 if (hw->mac_type == e1000_ce4100)
2393 hw->get_link_status = 1;
2394 if (hw->get_link_status) {
2395 e1000_check_for_link(hw);
2396 link_active = !hw->get_link_status;
2401 case e1000_media_type_fiber:
2402 e1000_check_for_link(hw);
2403 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2405 case e1000_media_type_internal_serdes:
2406 e1000_check_for_link(hw);
2407 link_active = hw->serdes_has_link;
2417 * e1000_watchdog - work function
2418 * @work: work struct contained inside adapter struct
2420 static void e1000_watchdog(struct work_struct *work)
2422 struct e1000_adapter *adapter = container_of(work,
2423 struct e1000_adapter,
2424 watchdog_task.work);
2425 struct e1000_hw *hw = &adapter->hw;
2426 struct net_device *netdev = adapter->netdev;
2427 struct e1000_tx_ring *txdr = adapter->tx_ring;
2430 if (test_bit(__E1000_DOWN, &adapter->flags))
2433 mutex_lock(&adapter->mutex);
2434 link = e1000_has_link(adapter);
2435 if ((netif_carrier_ok(netdev)) && link)
2439 if (!netif_carrier_ok(netdev)) {
2442 /* update snapshot of PHY registers on LSC */
2443 e1000_get_speed_and_duplex(hw,
2444 &adapter->link_speed,
2445 &adapter->link_duplex);
2448 pr_info("%s NIC Link is Up %d Mbps %s, "
2449 "Flow Control: %s\n",
2451 adapter->link_speed,
2452 adapter->link_duplex == FULL_DUPLEX ?
2453 "Full Duplex" : "Half Duplex",
2454 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2455 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2456 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2457 E1000_CTRL_TFCE) ? "TX" : "None")));
2459 /* adjust timeout factor according to speed/duplex */
2460 adapter->tx_timeout_factor = 1;
2461 switch (adapter->link_speed) {
2464 adapter->tx_timeout_factor = 16;
2468 /* maybe add some timeout factor ? */
2472 /* enable transmits in the hardware */
2474 tctl |= E1000_TCTL_EN;
2477 netif_carrier_on(netdev);
2478 if (!test_bit(__E1000_DOWN, &adapter->flags))
2479 schedule_delayed_work(&adapter->phy_info_task,
2481 adapter->smartspeed = 0;
2484 if (netif_carrier_ok(netdev)) {
2485 adapter->link_speed = 0;
2486 adapter->link_duplex = 0;
2487 pr_info("%s NIC Link is Down\n",
2489 netif_carrier_off(netdev);
2491 if (!test_bit(__E1000_DOWN, &adapter->flags))
2492 schedule_delayed_work(&adapter->phy_info_task,
2496 e1000_smartspeed(adapter);
2500 e1000_update_stats(adapter);
2502 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2503 adapter->tpt_old = adapter->stats.tpt;
2504 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2505 adapter->colc_old = adapter->stats.colc;
2507 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2508 adapter->gorcl_old = adapter->stats.gorcl;
2509 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2510 adapter->gotcl_old = adapter->stats.gotcl;
2512 e1000_update_adaptive(hw);
2514 if (!netif_carrier_ok(netdev)) {
2515 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2516 /* We've lost link, so the controller stops DMA,
2517 * but we've got queued Tx work that's never going
2518 * to get done, so reset controller to flush Tx.
2519 * (Do the reset outside of interrupt context).
2521 adapter->tx_timeout_count++;
2522 schedule_work(&adapter->reset_task);
2523 /* exit immediately since reset is imminent */
2528 /* Simple mode for Interrupt Throttle Rate (ITR) */
2529 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2530 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2531 * Total asymmetrical Tx or Rx gets ITR=8000;
2532 * everyone else is between 2000-8000.
2534 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2535 u32 dif = (adapter->gotcl > adapter->gorcl ?
2536 adapter->gotcl - adapter->gorcl :
2537 adapter->gorcl - adapter->gotcl) / 10000;
2538 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2540 ew32(ITR, 1000000000 / (itr * 256));
2543 /* Cause software interrupt to ensure rx ring is cleaned */
2544 ew32(ICS, E1000_ICS_RXDMT0);
2546 /* Force detection of hung controller every watchdog period */
2547 adapter->detect_tx_hung = true;
2549 /* Reschedule the task */
2550 if (!test_bit(__E1000_DOWN, &adapter->flags))
2551 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2554 mutex_unlock(&adapter->mutex);
2557 enum latency_range {
2561 latency_invalid = 255
2565 * e1000_update_itr - update the dynamic ITR value based on statistics
2566 * @adapter: pointer to adapter
2567 * @itr_setting: current adapter->itr
2568 * @packets: the number of packets during this measurement interval
2569 * @bytes: the number of bytes during this measurement interval
2571 * Stores a new ITR value based on packets and byte
2572 * counts during the last interrupt. The advantage of per interrupt
2573 * computation is faster updates and more accurate ITR for the current
2574 * traffic pattern. Constants in this function were computed
2575 * based on theoretical maximum wire speed and thresholds were set based
2576 * on testing data as well as attempting to minimize response time
2577 * while increasing bulk throughput.
2578 * this functionality is controlled by the InterruptThrottleRate module
2579 * parameter (see e1000_param.c)
2581 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2582 u16 itr_setting, int packets, int bytes)
2584 unsigned int retval = itr_setting;
2585 struct e1000_hw *hw = &adapter->hw;
2587 if (unlikely(hw->mac_type < e1000_82540))
2588 goto update_itr_done;
2591 goto update_itr_done;
2593 switch (itr_setting) {
2594 case lowest_latency:
2595 /* jumbo frames get bulk treatment*/
2596 if (bytes/packets > 8000)
2597 retval = bulk_latency;
2598 else if ((packets < 5) && (bytes > 512))
2599 retval = low_latency;
2601 case low_latency: /* 50 usec aka 20000 ints/s */
2602 if (bytes > 10000) {
2603 /* jumbo frames need bulk latency setting */
2604 if (bytes/packets > 8000)
2605 retval = bulk_latency;
2606 else if ((packets < 10) || ((bytes/packets) > 1200))
2607 retval = bulk_latency;
2608 else if ((packets > 35))
2609 retval = lowest_latency;
2610 } else if (bytes/packets > 2000)
2611 retval = bulk_latency;
2612 else if (packets <= 2 && bytes < 512)
2613 retval = lowest_latency;
2615 case bulk_latency: /* 250 usec aka 4000 ints/s */
2616 if (bytes > 25000) {
2618 retval = low_latency;
2619 } else if (bytes < 6000) {
2620 retval = low_latency;
2629 static void e1000_set_itr(struct e1000_adapter *adapter)
2631 struct e1000_hw *hw = &adapter->hw;
2633 u32 new_itr = adapter->itr;
2635 if (unlikely(hw->mac_type < e1000_82540))
2638 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2639 if (unlikely(adapter->link_speed != SPEED_1000)) {
2645 adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr,
2646 adapter->total_tx_packets,
2647 adapter->total_tx_bytes);
2648 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2649 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2650 adapter->tx_itr = low_latency;
2652 adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr,
2653 adapter->total_rx_packets,
2654 adapter->total_rx_bytes);
2655 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2656 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2657 adapter->rx_itr = low_latency;
2659 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2661 switch (current_itr) {
2662 /* counts and packets in update_itr are dependent on these numbers */
2663 case lowest_latency:
2667 new_itr = 20000; /* aka hwitr = ~200 */
2677 if (new_itr != adapter->itr) {
2678 /* this attempts to bias the interrupt rate towards Bulk
2679 * by adding intermediate steps when interrupt rate is
2682 new_itr = new_itr > adapter->itr ?
2683 min(adapter->itr + (new_itr >> 2), new_itr) :
2685 adapter->itr = new_itr;
2686 ew32(ITR, 1000000000 / (new_itr * 256));
2690 #define E1000_TX_FLAGS_CSUM 0x00000001
2691 #define E1000_TX_FLAGS_VLAN 0x00000002
2692 #define E1000_TX_FLAGS_TSO 0x00000004
2693 #define E1000_TX_FLAGS_IPV4 0x00000008
2694 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2695 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2696 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2698 static int e1000_tso(struct e1000_adapter *adapter,
2699 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2701 struct e1000_context_desc *context_desc;
2702 struct e1000_buffer *buffer_info;
2705 u16 ipcse = 0, tucse, mss;
2706 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2709 if (skb_is_gso(skb)) {
2710 if (skb_header_cloned(skb)) {
2711 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2716 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2717 mss = skb_shinfo(skb)->gso_size;
2718 if (skb->protocol == htons(ETH_P_IP)) {
2719 struct iphdr *iph = ip_hdr(skb);
2722 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2726 cmd_length = E1000_TXD_CMD_IP;
2727 ipcse = skb_transport_offset(skb) - 1;
2728 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2729 ipv6_hdr(skb)->payload_len = 0;
2730 tcp_hdr(skb)->check =
2731 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2732 &ipv6_hdr(skb)->daddr,
2736 ipcss = skb_network_offset(skb);
2737 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2738 tucss = skb_transport_offset(skb);
2739 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2742 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2743 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2745 i = tx_ring->next_to_use;
2746 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2747 buffer_info = &tx_ring->buffer_info[i];
2749 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2750 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2751 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2752 context_desc->upper_setup.tcp_fields.tucss = tucss;
2753 context_desc->upper_setup.tcp_fields.tucso = tucso;
2754 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2755 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2756 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2757 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2759 buffer_info->time_stamp = jiffies;
2760 buffer_info->next_to_watch = i;
2762 if (++i == tx_ring->count) i = 0;
2763 tx_ring->next_to_use = i;
2770 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2771 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2773 struct e1000_context_desc *context_desc;
2774 struct e1000_buffer *buffer_info;
2777 u32 cmd_len = E1000_TXD_CMD_DEXT;
2779 if (skb->ip_summed != CHECKSUM_PARTIAL)
2782 switch (skb->protocol) {
2783 case cpu_to_be16(ETH_P_IP):
2784 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2785 cmd_len |= E1000_TXD_CMD_TCP;
2787 case cpu_to_be16(ETH_P_IPV6):
2788 /* XXX not handling all IPV6 headers */
2789 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2790 cmd_len |= E1000_TXD_CMD_TCP;
2793 if (unlikely(net_ratelimit()))
2794 e_warn(drv, "checksum_partial proto=%x!\n",
2799 css = skb_checksum_start_offset(skb);
2801 i = tx_ring->next_to_use;
2802 buffer_info = &tx_ring->buffer_info[i];
2803 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2805 context_desc->lower_setup.ip_config = 0;
2806 context_desc->upper_setup.tcp_fields.tucss = css;
2807 context_desc->upper_setup.tcp_fields.tucso =
2808 css + skb->csum_offset;
2809 context_desc->upper_setup.tcp_fields.tucse = 0;
2810 context_desc->tcp_seg_setup.data = 0;
2811 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2813 buffer_info->time_stamp = jiffies;
2814 buffer_info->next_to_watch = i;
2816 if (unlikely(++i == tx_ring->count)) i = 0;
2817 tx_ring->next_to_use = i;
2822 #define E1000_MAX_TXD_PWR 12
2823 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2825 static int e1000_tx_map(struct e1000_adapter *adapter,
2826 struct e1000_tx_ring *tx_ring,
2827 struct sk_buff *skb, unsigned int first,
2828 unsigned int max_per_txd, unsigned int nr_frags,
2831 struct e1000_hw *hw = &adapter->hw;
2832 struct pci_dev *pdev = adapter->pdev;
2833 struct e1000_buffer *buffer_info;
2834 unsigned int len = skb_headlen(skb);
2835 unsigned int offset = 0, size, count = 0, i;
2836 unsigned int f, bytecount, segs;
2838 i = tx_ring->next_to_use;
2841 buffer_info = &tx_ring->buffer_info[i];
2842 size = min(len, max_per_txd);
2843 /* Workaround for Controller erratum --
2844 * descriptor for non-tso packet in a linear SKB that follows a
2845 * tso gets written back prematurely before the data is fully
2846 * DMA'd to the controller
2848 if (!skb->data_len && tx_ring->last_tx_tso &&
2850 tx_ring->last_tx_tso = false;
2854 /* Workaround for premature desc write-backs
2855 * in TSO mode. Append 4-byte sentinel desc
2857 if (unlikely(mss && !nr_frags && size == len && size > 8))
2859 /* work-around for errata 10 and it applies
2860 * to all controllers in PCI-X mode
2861 * The fix is to make sure that the first descriptor of a
2862 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2864 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2865 (size > 2015) && count == 0))
2868 /* Workaround for potential 82544 hang in PCI-X. Avoid
2869 * terminating buffers within evenly-aligned dwords.
2871 if (unlikely(adapter->pcix_82544 &&
2872 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2876 buffer_info->length = size;
2877 /* set time_stamp *before* dma to help avoid a possible race */
2878 buffer_info->time_stamp = jiffies;
2879 buffer_info->mapped_as_page = false;
2880 buffer_info->dma = dma_map_single(&pdev->dev,
2882 size, DMA_TO_DEVICE);
2883 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2885 buffer_info->next_to_watch = i;
2892 if (unlikely(i == tx_ring->count))
2897 for (f = 0; f < nr_frags; f++) {
2898 const struct skb_frag_struct *frag;
2900 frag = &skb_shinfo(skb)->frags[f];
2901 len = skb_frag_size(frag);
2905 unsigned long bufend;
2907 if (unlikely(i == tx_ring->count))
2910 buffer_info = &tx_ring->buffer_info[i];
2911 size = min(len, max_per_txd);
2912 /* Workaround for premature desc write-backs
2913 * in TSO mode. Append 4-byte sentinel desc
2915 if (unlikely(mss && f == (nr_frags-1) &&
2916 size == len && size > 8))
2918 /* Workaround for potential 82544 hang in PCI-X.
2919 * Avoid terminating buffers within evenly-aligned
2922 bufend = (unsigned long)
2923 page_to_phys(skb_frag_page(frag));
2924 bufend += offset + size - 1;
2925 if (unlikely(adapter->pcix_82544 &&
2930 buffer_info->length = size;
2931 buffer_info->time_stamp = jiffies;
2932 buffer_info->mapped_as_page = true;
2933 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2934 offset, size, DMA_TO_DEVICE);
2935 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2937 buffer_info->next_to_watch = i;
2945 segs = skb_shinfo(skb)->gso_segs ?: 1;
2946 /* multiply data chunks by size of headers */
2947 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2949 tx_ring->buffer_info[i].skb = skb;
2950 tx_ring->buffer_info[i].segs = segs;
2951 tx_ring->buffer_info[i].bytecount = bytecount;
2952 tx_ring->buffer_info[first].next_to_watch = i;
2957 dev_err(&pdev->dev, "TX DMA map failed\n");
2958 buffer_info->dma = 0;
2964 i += tx_ring->count;
2966 buffer_info = &tx_ring->buffer_info[i];
2967 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2973 static void e1000_tx_queue(struct e1000_adapter *adapter,
2974 struct e1000_tx_ring *tx_ring, int tx_flags,
2977 struct e1000_hw *hw = &adapter->hw;
2978 struct e1000_tx_desc *tx_desc = NULL;
2979 struct e1000_buffer *buffer_info;
2980 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2983 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2984 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2986 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2988 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2989 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2992 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2993 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2994 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2997 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2998 txd_lower |= E1000_TXD_CMD_VLE;
2999 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3002 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3003 txd_lower &= ~(E1000_TXD_CMD_IFCS);
3005 i = tx_ring->next_to_use;
3008 buffer_info = &tx_ring->buffer_info[i];
3009 tx_desc = E1000_TX_DESC(*tx_ring, i);
3010 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3011 tx_desc->lower.data =
3012 cpu_to_le32(txd_lower | buffer_info->length);
3013 tx_desc->upper.data = cpu_to_le32(txd_upper);
3014 if (unlikely(++i == tx_ring->count)) i = 0;
3017 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3019 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3020 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3021 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3023 /* Force memory writes to complete before letting h/w
3024 * know there are new descriptors to fetch. (Only
3025 * applicable for weak-ordered memory model archs,
3030 tx_ring->next_to_use = i;
3031 writel(i, hw->hw_addr + tx_ring->tdt);
3032 /* we need this if more than one processor can write to our tail
3033 * at a time, it synchronizes IO on IA64/Altix systems
3038 /* 82547 workaround to avoid controller hang in half-duplex environment.
3039 * The workaround is to avoid queuing a large packet that would span
3040 * the internal Tx FIFO ring boundary by notifying the stack to resend
3041 * the packet at a later time. This gives the Tx FIFO an opportunity to
3042 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3043 * to the beginning of the Tx FIFO.
3046 #define E1000_FIFO_HDR 0x10
3047 #define E1000_82547_PAD_LEN 0x3E0
3049 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3050 struct sk_buff *skb)
3052 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3053 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3055 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3057 if (adapter->link_duplex != HALF_DUPLEX)
3058 goto no_fifo_stall_required;
3060 if (atomic_read(&adapter->tx_fifo_stall))
3063 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3064 atomic_set(&adapter->tx_fifo_stall, 1);
3068 no_fifo_stall_required:
3069 adapter->tx_fifo_head += skb_fifo_len;
3070 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3071 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3075 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3077 struct e1000_adapter *adapter = netdev_priv(netdev);
3078 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3080 netif_stop_queue(netdev);
3081 /* Herbert's original patch had:
3082 * smp_mb__after_netif_stop_queue();
3083 * but since that doesn't exist yet, just open code it.
3087 /* We need to check again in a case another CPU has just
3088 * made room available.
3090 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3094 netif_start_queue(netdev);
3095 ++adapter->restart_queue;
3099 static int e1000_maybe_stop_tx(struct net_device *netdev,
3100 struct e1000_tx_ring *tx_ring, int size)
3102 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3104 return __e1000_maybe_stop_tx(netdev, size);
3107 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3108 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3109 struct net_device *netdev)
3111 struct e1000_adapter *adapter = netdev_priv(netdev);
3112 struct e1000_hw *hw = &adapter->hw;
3113 struct e1000_tx_ring *tx_ring;
3114 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3115 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3116 unsigned int tx_flags = 0;
3117 unsigned int len = skb_headlen(skb);
3118 unsigned int nr_frags;
3124 /* This goes back to the question of how to logically map a Tx queue
3125 * to a flow. Right now, performance is impacted slightly negatively
3126 * if using multiple Tx queues. If the stack breaks away from a
3127 * single qdisc implementation, we can look at this again.
3129 tx_ring = adapter->tx_ring;
3131 if (unlikely(skb->len <= 0)) {
3132 dev_kfree_skb_any(skb);
3133 return NETDEV_TX_OK;
3136 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3137 * packets may get corrupted during padding by HW.
3138 * To WA this issue, pad all small packets manually.
3140 if (skb->len < ETH_ZLEN) {
3141 if (skb_pad(skb, ETH_ZLEN - skb->len))
3142 return NETDEV_TX_OK;
3143 skb->len = ETH_ZLEN;
3144 skb_set_tail_pointer(skb, ETH_ZLEN);
3147 mss = skb_shinfo(skb)->gso_size;
3148 /* The controller does a simple calculation to
3149 * make sure there is enough room in the FIFO before
3150 * initiating the DMA for each buffer. The calc is:
3151 * 4 = ceil(buffer len/mss). To make sure we don't
3152 * overrun the FIFO, adjust the max buffer len if mss
3157 max_per_txd = min(mss << 2, max_per_txd);
3158 max_txd_pwr = fls(max_per_txd) - 1;
3160 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3161 if (skb->data_len && hdr_len == len) {
3162 switch (hw->mac_type) {
3163 unsigned int pull_size;
3165 /* Make sure we have room to chop off 4 bytes,
3166 * and that the end alignment will work out to
3167 * this hardware's requirements
3168 * NOTE: this is a TSO only workaround
3169 * if end byte alignment not correct move us
3170 * into the next dword
3172 if ((unsigned long)(skb_tail_pointer(skb) - 1)
3176 pull_size = min((unsigned int)4, skb->data_len);
3177 if (!__pskb_pull_tail(skb, pull_size)) {
3178 e_err(drv, "__pskb_pull_tail "
3180 dev_kfree_skb_any(skb);
3181 return NETDEV_TX_OK;
3183 len = skb_headlen(skb);
3192 /* reserve a descriptor for the offload context */
3193 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3197 /* Controller Erratum workaround */
3198 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3201 count += TXD_USE_COUNT(len, max_txd_pwr);
3203 if (adapter->pcix_82544)
3206 /* work-around for errata 10 and it applies to all controllers
3207 * in PCI-X mode, so add one more descriptor to the count
3209 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3213 nr_frags = skb_shinfo(skb)->nr_frags;
3214 for (f = 0; f < nr_frags; f++)
3215 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3217 if (adapter->pcix_82544)
3220 /* need: count + 2 desc gap to keep tail from touching
3221 * head, otherwise try next time
3223 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3224 return NETDEV_TX_BUSY;
3226 if (unlikely((hw->mac_type == e1000_82547) &&
3227 (e1000_82547_fifo_workaround(adapter, skb)))) {
3228 netif_stop_queue(netdev);
3229 if (!test_bit(__E1000_DOWN, &adapter->flags))
3230 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3231 return NETDEV_TX_BUSY;
3234 if (vlan_tx_tag_present(skb)) {
3235 tx_flags |= E1000_TX_FLAGS_VLAN;
3236 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3239 first = tx_ring->next_to_use;
3241 tso = e1000_tso(adapter, tx_ring, skb);
3243 dev_kfree_skb_any(skb);
3244 return NETDEV_TX_OK;
3248 if (likely(hw->mac_type != e1000_82544))
3249 tx_ring->last_tx_tso = true;
3250 tx_flags |= E1000_TX_FLAGS_TSO;
3251 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3252 tx_flags |= E1000_TX_FLAGS_CSUM;
3254 if (likely(skb->protocol == htons(ETH_P_IP)))
3255 tx_flags |= E1000_TX_FLAGS_IPV4;
3257 if (unlikely(skb->no_fcs))
3258 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3260 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3264 netdev_sent_queue(netdev, skb->len);
3265 skb_tx_timestamp(skb);
3267 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3268 /* Make sure there is space in the ring for the next send. */
3269 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3272 dev_kfree_skb_any(skb);
3273 tx_ring->buffer_info[first].time_stamp = 0;
3274 tx_ring->next_to_use = first;
3277 return NETDEV_TX_OK;
3280 #define NUM_REGS 38 /* 1 based count */
3281 static void e1000_regdump(struct e1000_adapter *adapter)
3283 struct e1000_hw *hw = &adapter->hw;
3285 u32 *regs_buff = regs;
3288 static const char * const reg_name[] = {
3290 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3291 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3292 "TIDV", "TXDCTL", "TADV", "TARC0",
3293 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3295 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3296 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3297 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3300 regs_buff[0] = er32(CTRL);
3301 regs_buff[1] = er32(STATUS);
3303 regs_buff[2] = er32(RCTL);
3304 regs_buff[3] = er32(RDLEN);
3305 regs_buff[4] = er32(RDH);
3306 regs_buff[5] = er32(RDT);
3307 regs_buff[6] = er32(RDTR);
3309 regs_buff[7] = er32(TCTL);
3310 regs_buff[8] = er32(TDBAL);
3311 regs_buff[9] = er32(TDBAH);
3312 regs_buff[10] = er32(TDLEN);
3313 regs_buff[11] = er32(TDH);
3314 regs_buff[12] = er32(TDT);
3315 regs_buff[13] = er32(TIDV);
3316 regs_buff[14] = er32(TXDCTL);
3317 regs_buff[15] = er32(TADV);
3318 regs_buff[16] = er32(TARC0);
3320 regs_buff[17] = er32(TDBAL1);
3321 regs_buff[18] = er32(TDBAH1);
3322 regs_buff[19] = er32(TDLEN1);
3323 regs_buff[20] = er32(TDH1);
3324 regs_buff[21] = er32(TDT1);
3325 regs_buff[22] = er32(TXDCTL1);
3326 regs_buff[23] = er32(TARC1);
3327 regs_buff[24] = er32(CTRL_EXT);
3328 regs_buff[25] = er32(ERT);
3329 regs_buff[26] = er32(RDBAL0);
3330 regs_buff[27] = er32(RDBAH0);
3331 regs_buff[28] = er32(TDFH);
3332 regs_buff[29] = er32(TDFT);
3333 regs_buff[30] = er32(TDFHS);
3334 regs_buff[31] = er32(TDFTS);
3335 regs_buff[32] = er32(TDFPC);
3336 regs_buff[33] = er32(RDFH);
3337 regs_buff[34] = er32(RDFT);
3338 regs_buff[35] = er32(RDFHS);
3339 regs_buff[36] = er32(RDFTS);
3340 regs_buff[37] = er32(RDFPC);
3342 pr_info("Register dump\n");
3343 for (i = 0; i < NUM_REGS; i++)
3344 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3348 * e1000_dump: Print registers, tx ring and rx ring
3350 static void e1000_dump(struct e1000_adapter *adapter)
3352 /* this code doesn't handle multiple rings */
3353 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3354 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3357 if (!netif_msg_hw(adapter))
3360 /* Print Registers */
3361 e1000_regdump(adapter);
3364 pr_info("TX Desc ring0 dump\n");
3366 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3368 * Legacy Transmit Descriptor
3369 * +--------------------------------------------------------------+
3370 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3371 * +--------------------------------------------------------------+
3372 * 8 | Special | CSS | Status | CMD | CSO | Length |
3373 * +--------------------------------------------------------------+
3374 * 63 48 47 36 35 32 31 24 23 16 15 0
3376 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3377 * 63 48 47 40 39 32 31 16 15 8 7 0
3378 * +----------------------------------------------------------------+
3379 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3380 * +----------------------------------------------------------------+
3381 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3382 * +----------------------------------------------------------------+
3383 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3385 * Extended Data Descriptor (DTYP=0x1)
3386 * +----------------------------------------------------------------+
3387 * 0 | Buffer Address [63:0] |
3388 * +----------------------------------------------------------------+
3389 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3390 * +----------------------------------------------------------------+
3391 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3393 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3394 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3396 if (!netif_msg_tx_done(adapter))
3397 goto rx_ring_summary;
3399 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3400 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3401 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
3402 struct my_u { __le64 a; __le64 b; };
3403 struct my_u *u = (struct my_u *)tx_desc;
3406 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3408 else if (i == tx_ring->next_to_use)
3410 else if (i == tx_ring->next_to_clean)
3415 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3416 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3417 le64_to_cpu(u->a), le64_to_cpu(u->b),
3418 (u64)buffer_info->dma, buffer_info->length,
3419 buffer_info->next_to_watch,
3420 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3425 pr_info("\nRX Desc ring dump\n");
3427 /* Legacy Receive Descriptor Format
3429 * +-----------------------------------------------------+
3430 * | Buffer Address [63:0] |
3431 * +-----------------------------------------------------+
3432 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3433 * +-----------------------------------------------------+
3434 * 63 48 47 40 39 32 31 16 15 0
3436 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3438 if (!netif_msg_rx_status(adapter))
3441 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3442 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3443 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i];
3444 struct my_u { __le64 a; __le64 b; };
3445 struct my_u *u = (struct my_u *)rx_desc;
3448 if (i == rx_ring->next_to_use)
3450 else if (i == rx_ring->next_to_clean)
3455 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3456 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3457 (u64)buffer_info->dma, buffer_info->skb, type);
3460 /* dump the descriptor caches */
3462 pr_info("Rx descriptor cache in 64bit format\n");
3463 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3464 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3466 readl(adapter->hw.hw_addr + i+4),
3467 readl(adapter->hw.hw_addr + i),
3468 readl(adapter->hw.hw_addr + i+12),
3469 readl(adapter->hw.hw_addr + i+8));
3472 pr_info("Tx descriptor cache in 64bit format\n");
3473 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3474 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3476 readl(adapter->hw.hw_addr + i+4),
3477 readl(adapter->hw.hw_addr + i),
3478 readl(adapter->hw.hw_addr + i+12),
3479 readl(adapter->hw.hw_addr + i+8));
3486 * e1000_tx_timeout - Respond to a Tx Hang
3487 * @netdev: network interface device structure
3489 static void e1000_tx_timeout(struct net_device *netdev)
3491 struct e1000_adapter *adapter = netdev_priv(netdev);
3493 /* Do the reset outside of interrupt context */
3494 adapter->tx_timeout_count++;
3495 schedule_work(&adapter->reset_task);
3498 static void e1000_reset_task(struct work_struct *work)
3500 struct e1000_adapter *adapter =
3501 container_of(work, struct e1000_adapter, reset_task);
3503 if (test_bit(__E1000_DOWN, &adapter->flags))
3505 e_err(drv, "Reset adapter\n");
3506 e1000_reinit_safe(adapter);
3510 * e1000_get_stats - Get System Network Statistics
3511 * @netdev: network interface device structure
3513 * Returns the address of the device statistics structure.
3514 * The statistics are actually updated from the watchdog.
3516 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3518 /* only return the current stats */
3519 return &netdev->stats;
3523 * e1000_change_mtu - Change the Maximum Transfer Unit
3524 * @netdev: network interface device structure
3525 * @new_mtu: new value for maximum frame size
3527 * Returns 0 on success, negative on failure
3529 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3531 struct e1000_adapter *adapter = netdev_priv(netdev);
3532 struct e1000_hw *hw = &adapter->hw;
3533 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3535 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3536 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3537 e_err(probe, "Invalid MTU setting\n");
3541 /* Adapter-specific max frame size limits. */
3542 switch (hw->mac_type) {
3543 case e1000_undefined ... e1000_82542_rev2_1:
3544 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3545 e_err(probe, "Jumbo Frames not supported.\n");
3550 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3554 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3556 /* e1000_down has a dependency on max_frame_size */
3557 hw->max_frame_size = max_frame;
3558 if (netif_running(netdev))
3559 e1000_down(adapter);
3561 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3562 * means we reserve 2 more, this pushes us to allocate from the next
3564 * i.e. RXBUFFER_2048 --> size-4096 slab
3565 * however with the new *_jumbo_rx* routines, jumbo receives will use
3569 if (max_frame <= E1000_RXBUFFER_2048)
3570 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3572 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3573 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3574 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3575 adapter->rx_buffer_len = PAGE_SIZE;
3578 /* adjust allocation if LPE protects us, and we aren't using SBP */
3579 if (!hw->tbi_compatibility_on &&
3580 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3581 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3582 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3584 pr_info("%s changing MTU from %d to %d\n",
3585 netdev->name, netdev->mtu, new_mtu);
3586 netdev->mtu = new_mtu;
3588 if (netif_running(netdev))
3591 e1000_reset(adapter);
3593 clear_bit(__E1000_RESETTING, &adapter->flags);
3599 * e1000_update_stats - Update the board statistics counters
3600 * @adapter: board private structure
3602 void e1000_update_stats(struct e1000_adapter *adapter)
3604 struct net_device *netdev = adapter->netdev;
3605 struct e1000_hw *hw = &adapter->hw;
3606 struct pci_dev *pdev = adapter->pdev;
3607 unsigned long flags;
3610 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3612 /* Prevent stats update while adapter is being reset, or if the pci
3613 * connection is down.
3615 if (adapter->link_speed == 0)
3617 if (pci_channel_offline(pdev))
3620 spin_lock_irqsave(&adapter->stats_lock, flags);
3622 /* these counters are modified from e1000_tbi_adjust_stats,
3623 * called from the interrupt context, so they must only
3624 * be written while holding adapter->stats_lock
3627 adapter->stats.crcerrs += er32(CRCERRS);
3628 adapter->stats.gprc += er32(GPRC);
3629 adapter->stats.gorcl += er32(GORCL);
3630 adapter->stats.gorch += er32(GORCH);
3631 adapter->stats.bprc += er32(BPRC);
3632 adapter->stats.mprc += er32(MPRC);
3633 adapter->stats.roc += er32(ROC);
3635 adapter->stats.prc64 += er32(PRC64);
3636 adapter->stats.prc127 += er32(PRC127);
3637 adapter->stats.prc255 += er32(PRC255);
3638 adapter->stats.prc511 += er32(PRC511);
3639 adapter->stats.prc1023 += er32(PRC1023);
3640 adapter->stats.prc1522 += er32(PRC1522);
3642 adapter->stats.symerrs += er32(SYMERRS);
3643 adapter->stats.mpc += er32(MPC);
3644 adapter->stats.scc += er32(SCC);
3645 adapter->stats.ecol += er32(ECOL);
3646 adapter->stats.mcc += er32(MCC);
3647 adapter->stats.latecol += er32(LATECOL);
3648 adapter->stats.dc += er32(DC);
3649 adapter->stats.sec += er32(SEC);
3650 adapter->stats.rlec += er32(RLEC);
3651 adapter->stats.xonrxc += er32(XONRXC);
3652 adapter->stats.xontxc += er32(XONTXC);
3653 adapter->stats.xoffrxc += er32(XOFFRXC);
3654 adapter->stats.xofftxc += er32(XOFFTXC);
3655 adapter->stats.fcruc += er32(FCRUC);
3656 adapter->stats.gptc += er32(GPTC);
3657 adapter->stats.gotcl += er32(GOTCL);
3658 adapter->stats.gotch += er32(GOTCH);
3659 adapter->stats.rnbc += er32(RNBC);
3660 adapter->stats.ruc += er32(RUC);
3661 adapter->stats.rfc += er32(RFC);
3662 adapter->stats.rjc += er32(RJC);
3663 adapter->stats.torl += er32(TORL);
3664 adapter->stats.torh += er32(TORH);
3665 adapter->stats.totl += er32(TOTL);
3666 adapter->stats.toth += er32(TOTH);
3667 adapter->stats.tpr += er32(TPR);
3669 adapter->stats.ptc64 += er32(PTC64);
3670 adapter->stats.ptc127 += er32(PTC127);
3671 adapter->stats.ptc255 += er32(PTC255);
3672 adapter->stats.ptc511 += er32(PTC511);
3673 adapter->stats.ptc1023 += er32(PTC1023);
3674 adapter->stats.ptc1522 += er32(PTC1522);
3676 adapter->stats.mptc += er32(MPTC);
3677 adapter->stats.bptc += er32(BPTC);
3679 /* used for adaptive IFS */
3681 hw->tx_packet_delta = er32(TPT);
3682 adapter->stats.tpt += hw->tx_packet_delta;
3683 hw->collision_delta = er32(COLC);
3684 adapter->stats.colc += hw->collision_delta;
3686 if (hw->mac_type >= e1000_82543) {
3687 adapter->stats.algnerrc += er32(ALGNERRC);
3688 adapter->stats.rxerrc += er32(RXERRC);
3689 adapter->stats.tncrs += er32(TNCRS);
3690 adapter->stats.cexterr += er32(CEXTERR);
3691 adapter->stats.tsctc += er32(TSCTC);
3692 adapter->stats.tsctfc += er32(TSCTFC);
3695 /* Fill out the OS statistics structure */
3696 netdev->stats.multicast = adapter->stats.mprc;
3697 netdev->stats.collisions = adapter->stats.colc;
3701 /* RLEC on some newer hardware can be incorrect so build
3702 * our own version based on RUC and ROC
3704 netdev->stats.rx_errors = adapter->stats.rxerrc +
3705 adapter->stats.crcerrs + adapter->stats.algnerrc +
3706 adapter->stats.ruc + adapter->stats.roc +
3707 adapter->stats.cexterr;
3708 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3709 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3710 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3711 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3712 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3715 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3716 netdev->stats.tx_errors = adapter->stats.txerrc;
3717 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3718 netdev->stats.tx_window_errors = adapter->stats.latecol;
3719 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3720 if (hw->bad_tx_carr_stats_fd &&
3721 adapter->link_duplex == FULL_DUPLEX) {
3722 netdev->stats.tx_carrier_errors = 0;
3723 adapter->stats.tncrs = 0;
3726 /* Tx Dropped needs to be maintained elsewhere */
3729 if (hw->media_type == e1000_media_type_copper) {
3730 if ((adapter->link_speed == SPEED_1000) &&
3731 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3732 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3733 adapter->phy_stats.idle_errors += phy_tmp;
3736 if ((hw->mac_type <= e1000_82546) &&
3737 (hw->phy_type == e1000_phy_m88) &&
3738 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3739 adapter->phy_stats.receive_errors += phy_tmp;
3742 /* Management Stats */
3743 if (hw->has_smbus) {
3744 adapter->stats.mgptc += er32(MGTPTC);
3745 adapter->stats.mgprc += er32(MGTPRC);
3746 adapter->stats.mgpdc += er32(MGTPDC);
3749 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3753 * e1000_intr - Interrupt Handler
3754 * @irq: interrupt number
3755 * @data: pointer to a network interface device structure
3757 static irqreturn_t e1000_intr(int irq, void *data)
3759 struct net_device *netdev = data;
3760 struct e1000_adapter *adapter = netdev_priv(netdev);
3761 struct e1000_hw *hw = &adapter->hw;
3762 u32 icr = er32(ICR);
3764 if (unlikely((!icr)))
3765 return IRQ_NONE; /* Not our interrupt */
3767 /* we might have caused the interrupt, but the above
3768 * read cleared it, and just in case the driver is
3769 * down there is nothing to do so return handled
3771 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3774 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3775 hw->get_link_status = 1;
3776 /* guard against interrupt when we're going down */
3777 if (!test_bit(__E1000_DOWN, &adapter->flags))
3778 schedule_delayed_work(&adapter->watchdog_task, 1);
3781 /* disable interrupts, without the synchronize_irq bit */
3783 E1000_WRITE_FLUSH();
3785 if (likely(napi_schedule_prep(&adapter->napi))) {
3786 adapter->total_tx_bytes = 0;
3787 adapter->total_tx_packets = 0;
3788 adapter->total_rx_bytes = 0;
3789 adapter->total_rx_packets = 0;
3790 __napi_schedule(&adapter->napi);
3792 /* this really should not happen! if it does it is basically a
3793 * bug, but not a hard error, so enable ints and continue
3795 if (!test_bit(__E1000_DOWN, &adapter->flags))
3796 e1000_irq_enable(adapter);
3803 * e1000_clean - NAPI Rx polling callback
3804 * @adapter: board private structure
3806 static int e1000_clean(struct napi_struct *napi, int budget)
3808 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
3810 int tx_clean_complete = 0, work_done = 0;
3812 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3814 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3816 if (!tx_clean_complete)
3819 /* If budget not fully consumed, exit the polling mode */
3820 if (work_done < budget) {
3821 if (likely(adapter->itr_setting & 3))
3822 e1000_set_itr(adapter);
3823 napi_complete(napi);
3824 if (!test_bit(__E1000_DOWN, &adapter->flags))
3825 e1000_irq_enable(adapter);
3832 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3833 * @adapter: board private structure
3835 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3836 struct e1000_tx_ring *tx_ring)
3838 struct e1000_hw *hw = &adapter->hw;
3839 struct net_device *netdev = adapter->netdev;
3840 struct e1000_tx_desc *tx_desc, *eop_desc;
3841 struct e1000_buffer *buffer_info;
3842 unsigned int i, eop;
3843 unsigned int count = 0;
3844 unsigned int total_tx_bytes=0, total_tx_packets=0;
3845 unsigned int bytes_compl = 0, pkts_compl = 0;
3847 i = tx_ring->next_to_clean;
3848 eop = tx_ring->buffer_info[i].next_to_watch;
3849 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3851 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3852 (count < tx_ring->count)) {
3853 bool cleaned = false;
3854 rmb(); /* read buffer_info after eop_desc */
3855 for ( ; !cleaned; count++) {
3856 tx_desc = E1000_TX_DESC(*tx_ring, i);
3857 buffer_info = &tx_ring->buffer_info[i];
3858 cleaned = (i == eop);
3861 total_tx_packets += buffer_info->segs;
3862 total_tx_bytes += buffer_info->bytecount;
3863 if (buffer_info->skb) {
3864 bytes_compl += buffer_info->skb->len;
3869 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3870 tx_desc->upper.data = 0;
3872 if (unlikely(++i == tx_ring->count)) i = 0;
3875 eop = tx_ring->buffer_info[i].next_to_watch;
3876 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3879 tx_ring->next_to_clean = i;
3881 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
3883 #define TX_WAKE_THRESHOLD 32
3884 if (unlikely(count && netif_carrier_ok(netdev) &&
3885 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3886 /* Make sure that anybody stopping the queue after this
3887 * sees the new next_to_clean.
3891 if (netif_queue_stopped(netdev) &&
3892 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3893 netif_wake_queue(netdev);
3894 ++adapter->restart_queue;
3898 if (adapter->detect_tx_hung) {
3899 /* Detect a transmit hang in hardware, this serializes the
3900 * check with the clearing of time_stamp and movement of i
3902 adapter->detect_tx_hung = false;
3903 if (tx_ring->buffer_info[eop].time_stamp &&
3904 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3905 (adapter->tx_timeout_factor * HZ)) &&
3906 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3908 /* detected Tx unit hang */
3909 e_err(drv, "Detected Tx Unit Hang\n"
3913 " next_to_use <%x>\n"
3914 " next_to_clean <%x>\n"
3915 "buffer_info[next_to_clean]\n"
3916 " time_stamp <%lx>\n"
3917 " next_to_watch <%x>\n"
3919 " next_to_watch.status <%x>\n",
3920 (unsigned long)((tx_ring - adapter->tx_ring) /
3921 sizeof(struct e1000_tx_ring)),
3922 readl(hw->hw_addr + tx_ring->tdh),
3923 readl(hw->hw_addr + tx_ring->tdt),
3924 tx_ring->next_to_use,
3925 tx_ring->next_to_clean,
3926 tx_ring->buffer_info[eop].time_stamp,
3929 eop_desc->upper.fields.status);
3930 e1000_dump(adapter);
3931 netif_stop_queue(netdev);
3934 adapter->total_tx_bytes += total_tx_bytes;
3935 adapter->total_tx_packets += total_tx_packets;
3936 netdev->stats.tx_bytes += total_tx_bytes;
3937 netdev->stats.tx_packets += total_tx_packets;
3938 return count < tx_ring->count;
3942 * e1000_rx_checksum - Receive Checksum Offload for 82543
3943 * @adapter: board private structure
3944 * @status_err: receive descriptor status and error fields
3945 * @csum: receive descriptor csum field
3946 * @sk_buff: socket buffer with received data
3948 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3949 u32 csum, struct sk_buff *skb)
3951 struct e1000_hw *hw = &adapter->hw;
3952 u16 status = (u16)status_err;
3953 u8 errors = (u8)(status_err >> 24);
3955 skb_checksum_none_assert(skb);
3957 /* 82543 or newer only */
3958 if (unlikely(hw->mac_type < e1000_82543)) return;
3959 /* Ignore Checksum bit is set */
3960 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3961 /* TCP/UDP checksum error bit is set */
3962 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3963 /* let the stack verify checksum errors */
3964 adapter->hw_csum_err++;
3967 /* TCP/UDP Checksum has not been calculated */
3968 if (!(status & E1000_RXD_STAT_TCPCS))
3971 /* It must be a TCP or UDP packet with a valid checksum */
3972 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3973 /* TCP checksum is good */
3974 skb->ip_summed = CHECKSUM_UNNECESSARY;
3976 adapter->hw_csum_good++;
3980 * e1000_consume_page - helper function
3982 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3987 skb->data_len += length;
3988 skb->truesize += PAGE_SIZE;
3992 * e1000_receive_skb - helper function to handle rx indications
3993 * @adapter: board private structure
3994 * @status: descriptor status field as written by hardware
3995 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3996 * @skb: pointer to sk_buff to be indicated to stack
3998 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3999 __le16 vlan, struct sk_buff *skb)
4001 skb->protocol = eth_type_trans(skb, adapter->netdev);
4003 if (status & E1000_RXD_STAT_VP) {
4004 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4006 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4008 napi_gro_receive(&adapter->napi, skb);
4012 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4013 * @adapter: board private structure
4014 * @rx_ring: ring to clean
4015 * @work_done: amount of napi work completed this call
4016 * @work_to_do: max amount of work allowed for this call to do
4018 * the return value indicates whether actual cleaning was done, there
4019 * is no guarantee that everything was cleaned
4021 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
4022 struct e1000_rx_ring *rx_ring,
4023 int *work_done, int work_to_do)
4025 struct e1000_hw *hw = &adapter->hw;
4026 struct net_device *netdev = adapter->netdev;
4027 struct pci_dev *pdev = adapter->pdev;
4028 struct e1000_rx_desc *rx_desc, *next_rxd;
4029 struct e1000_buffer *buffer_info, *next_buffer;
4030 unsigned long irq_flags;
4033 int cleaned_count = 0;
4034 bool cleaned = false;
4035 unsigned int total_rx_bytes=0, total_rx_packets=0;
4037 i = rx_ring->next_to_clean;
4038 rx_desc = E1000_RX_DESC(*rx_ring, i);
4039 buffer_info = &rx_ring->buffer_info[i];
4041 while (rx_desc->status & E1000_RXD_STAT_DD) {
4042 struct sk_buff *skb;
4045 if (*work_done >= work_to_do)
4048 rmb(); /* read descriptor and rx_buffer_info after status DD */
4050 status = rx_desc->status;
4051 skb = buffer_info->skb;
4052 buffer_info->skb = NULL;
4054 if (++i == rx_ring->count) i = 0;
4055 next_rxd = E1000_RX_DESC(*rx_ring, i);
4058 next_buffer = &rx_ring->buffer_info[i];
4062 dma_unmap_page(&pdev->dev, buffer_info->dma,
4063 buffer_info->length, DMA_FROM_DEVICE);
4064 buffer_info->dma = 0;
4066 length = le16_to_cpu(rx_desc->length);
4068 /* errors is only valid for DD + EOP descriptors */
4069 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4070 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4074 mapped = page_address(buffer_info->page);
4075 last_byte = *(mapped + length - 1);
4076 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4078 spin_lock_irqsave(&adapter->stats_lock,
4080 e1000_tbi_adjust_stats(hw, &adapter->stats,
4082 spin_unlock_irqrestore(&adapter->stats_lock,
4086 if (netdev->features & NETIF_F_RXALL)
4088 /* recycle both page and skb */
4089 buffer_info->skb = skb;
4090 /* an error means any chain goes out the window
4093 if (rx_ring->rx_skb_top)
4094 dev_kfree_skb(rx_ring->rx_skb_top);
4095 rx_ring->rx_skb_top = NULL;
4100 #define rxtop rx_ring->rx_skb_top
4102 if (!(status & E1000_RXD_STAT_EOP)) {
4103 /* this descriptor is only the beginning (or middle) */
4105 /* this is the beginning of a chain */
4107 skb_fill_page_desc(rxtop, 0, buffer_info->page,
4110 /* this is the middle of a chain */
4111 skb_fill_page_desc(rxtop,
4112 skb_shinfo(rxtop)->nr_frags,
4113 buffer_info->page, 0, length);
4114 /* re-use the skb, only consumed the page */
4115 buffer_info->skb = skb;
4117 e1000_consume_page(buffer_info, rxtop, length);
4121 /* end of the chain */
4122 skb_fill_page_desc(rxtop,
4123 skb_shinfo(rxtop)->nr_frags,
4124 buffer_info->page, 0, length);
4125 /* re-use the current skb, we only consumed the
4128 buffer_info->skb = skb;
4131 e1000_consume_page(buffer_info, skb, length);
4133 /* no chain, got EOP, this buf is the packet
4134 * copybreak to save the put_page/alloc_page
4136 if (length <= copybreak &&
4137 skb_tailroom(skb) >= length) {
4139 vaddr = kmap_atomic(buffer_info->page);
4140 memcpy(skb_tail_pointer(skb), vaddr,
4142 kunmap_atomic(vaddr);
4143 /* re-use the page, so don't erase
4146 skb_put(skb, length);
4148 skb_fill_page_desc(skb, 0,
4149 buffer_info->page, 0,
4151 e1000_consume_page(buffer_info, skb,
4157 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4158 e1000_rx_checksum(adapter,
4160 ((u32)(rx_desc->errors) << 24),
4161 le16_to_cpu(rx_desc->csum), skb);
4163 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4164 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4165 pskb_trim(skb, skb->len - 4);
4168 /* eth type trans needs skb->data to point to something */
4169 if (!pskb_may_pull(skb, ETH_HLEN)) {
4170 e_err(drv, "pskb_may_pull failed.\n");
4175 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4178 rx_desc->status = 0;
4180 /* return some buffers to hardware, one at a time is too slow */
4181 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4182 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4186 /* use prefetched values */
4188 buffer_info = next_buffer;
4190 rx_ring->next_to_clean = i;
4192 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4194 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4196 adapter->total_rx_packets += total_rx_packets;
4197 adapter->total_rx_bytes += total_rx_bytes;
4198 netdev->stats.rx_bytes += total_rx_bytes;
4199 netdev->stats.rx_packets += total_rx_packets;
4203 /* this should improve performance for small packets with large amounts
4204 * of reassembly being done in the stack
4206 static void e1000_check_copybreak(struct net_device *netdev,
4207 struct e1000_buffer *buffer_info,
4208 u32 length, struct sk_buff **skb)
4210 struct sk_buff *new_skb;
4212 if (length > copybreak)
4215 new_skb = netdev_alloc_skb_ip_align(netdev, length);
4219 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
4220 (*skb)->data - NET_IP_ALIGN,
4221 length + NET_IP_ALIGN);
4222 /* save the skb in buffer_info as good */
4223 buffer_info->skb = *skb;
4228 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4229 * @adapter: board private structure
4230 * @rx_ring: ring to clean
4231 * @work_done: amount of napi work completed this call
4232 * @work_to_do: max amount of work allowed for this call to do
4234 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4235 struct e1000_rx_ring *rx_ring,
4236 int *work_done, int work_to_do)
4238 struct e1000_hw *hw = &adapter->hw;
4239 struct net_device *netdev = adapter->netdev;
4240 struct pci_dev *pdev = adapter->pdev;
4241 struct e1000_rx_desc *rx_desc, *next_rxd;
4242 struct e1000_buffer *buffer_info, *next_buffer;
4243 unsigned long flags;
4246 int cleaned_count = 0;
4247 bool cleaned = false;
4248 unsigned int total_rx_bytes=0, total_rx_packets=0;
4250 i = rx_ring->next_to_clean;
4251 rx_desc = E1000_RX_DESC(*rx_ring, i);
4252 buffer_info = &rx_ring->buffer_info[i];
4254 while (rx_desc->status & E1000_RXD_STAT_DD) {
4255 struct sk_buff *skb;
4258 if (*work_done >= work_to_do)
4261 rmb(); /* read descriptor and rx_buffer_info after status DD */
4263 status = rx_desc->status;
4264 skb = buffer_info->skb;
4265 buffer_info->skb = NULL;
4267 prefetch(skb->data - NET_IP_ALIGN);
4269 if (++i == rx_ring->count) i = 0;
4270 next_rxd = E1000_RX_DESC(*rx_ring, i);
4273 next_buffer = &rx_ring->buffer_info[i];
4277 dma_unmap_single(&pdev->dev, buffer_info->dma,
4278 buffer_info->length, DMA_FROM_DEVICE);
4279 buffer_info->dma = 0;
4281 length = le16_to_cpu(rx_desc->length);
4282 /* !EOP means multiple descriptors were used to store a single
4283 * packet, if thats the case we need to toss it. In fact, we
4284 * to toss every packet with the EOP bit clear and the next
4285 * frame that _does_ have the EOP bit set, as it is by
4286 * definition only a frame fragment
4288 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4289 adapter->discarding = true;
4291 if (adapter->discarding) {
4292 /* All receives must fit into a single buffer */
4293 e_dbg("Receive packet consumed multiple buffers\n");
4295 buffer_info->skb = skb;
4296 if (status & E1000_RXD_STAT_EOP)
4297 adapter->discarding = false;
4301 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4302 u8 last_byte = *(skb->data + length - 1);
4303 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4305 spin_lock_irqsave(&adapter->stats_lock, flags);
4306 e1000_tbi_adjust_stats(hw, &adapter->stats,
4308 spin_unlock_irqrestore(&adapter->stats_lock,
4312 if (netdev->features & NETIF_F_RXALL)
4315 buffer_info->skb = skb;
4321 total_rx_bytes += (length - 4); /* don't count FCS */
4324 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4325 /* adjust length to remove Ethernet CRC, this must be
4326 * done after the TBI_ACCEPT workaround above
4330 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4332 skb_put(skb, length);
4334 /* Receive Checksum Offload */
4335 e1000_rx_checksum(adapter,
4337 ((u32)(rx_desc->errors) << 24),
4338 le16_to_cpu(rx_desc->csum), skb);
4340 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4343 rx_desc->status = 0;
4345 /* return some buffers to hardware, one at a time is too slow */
4346 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4347 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4351 /* use prefetched values */
4353 buffer_info = next_buffer;
4355 rx_ring->next_to_clean = i;
4357 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4359 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4361 adapter->total_rx_packets += total_rx_packets;
4362 adapter->total_rx_bytes += total_rx_bytes;
4363 netdev->stats.rx_bytes += total_rx_bytes;
4364 netdev->stats.rx_packets += total_rx_packets;
4369 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4370 * @adapter: address of board private structure
4371 * @rx_ring: pointer to receive ring structure
4372 * @cleaned_count: number of buffers to allocate this pass
4375 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4376 struct e1000_rx_ring *rx_ring, int cleaned_count)
4378 struct net_device *netdev = adapter->netdev;
4379 struct pci_dev *pdev = adapter->pdev;
4380 struct e1000_rx_desc *rx_desc;
4381 struct e1000_buffer *buffer_info;
4382 struct sk_buff *skb;
4384 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4386 i = rx_ring->next_to_use;
4387 buffer_info = &rx_ring->buffer_info[i];
4389 while (cleaned_count--) {
4390 skb = buffer_info->skb;
4396 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4397 if (unlikely(!skb)) {
4398 /* Better luck next round */
4399 adapter->alloc_rx_buff_failed++;
4403 buffer_info->skb = skb;
4404 buffer_info->length = adapter->rx_buffer_len;
4406 /* allocate a new page if necessary */
4407 if (!buffer_info->page) {
4408 buffer_info->page = alloc_page(GFP_ATOMIC);
4409 if (unlikely(!buffer_info->page)) {
4410 adapter->alloc_rx_buff_failed++;
4415 if (!buffer_info->dma) {
4416 buffer_info->dma = dma_map_page(&pdev->dev,
4417 buffer_info->page, 0,
4418 buffer_info->length,
4420 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4421 put_page(buffer_info->page);
4423 buffer_info->page = NULL;
4424 buffer_info->skb = NULL;
4425 buffer_info->dma = 0;
4426 adapter->alloc_rx_buff_failed++;
4427 break; /* while !buffer_info->skb */
4431 rx_desc = E1000_RX_DESC(*rx_ring, i);
4432 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4434 if (unlikely(++i == rx_ring->count))
4436 buffer_info = &rx_ring->buffer_info[i];
4439 if (likely(rx_ring->next_to_use != i)) {
4440 rx_ring->next_to_use = i;
4441 if (unlikely(i-- == 0))
4442 i = (rx_ring->count - 1);
4444 /* Force memory writes to complete before letting h/w
4445 * know there are new descriptors to fetch. (Only
4446 * applicable for weak-ordered memory model archs,
4450 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4455 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4456 * @adapter: address of board private structure
4458 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4459 struct e1000_rx_ring *rx_ring,
4462 struct e1000_hw *hw = &adapter->hw;
4463 struct net_device *netdev = adapter->netdev;
4464 struct pci_dev *pdev = adapter->pdev;
4465 struct e1000_rx_desc *rx_desc;
4466 struct e1000_buffer *buffer_info;
4467 struct sk_buff *skb;
4469 unsigned int bufsz = adapter->rx_buffer_len;
4471 i = rx_ring->next_to_use;
4472 buffer_info = &rx_ring->buffer_info[i];
4474 while (cleaned_count--) {
4475 skb = buffer_info->skb;
4481 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4482 if (unlikely(!skb)) {
4483 /* Better luck next round */
4484 adapter->alloc_rx_buff_failed++;
4488 /* Fix for errata 23, can't cross 64kB boundary */
4489 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4490 struct sk_buff *oldskb = skb;
4491 e_err(rx_err, "skb align check failed: %u bytes at "
4492 "%p\n", bufsz, skb->data);
4493 /* Try again, without freeing the previous */
4494 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4495 /* Failed allocation, critical failure */
4497 dev_kfree_skb(oldskb);
4498 adapter->alloc_rx_buff_failed++;
4502 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4505 dev_kfree_skb(oldskb);
4506 adapter->alloc_rx_buff_failed++;
4507 break; /* while !buffer_info->skb */
4510 /* Use new allocation */
4511 dev_kfree_skb(oldskb);
4513 buffer_info->skb = skb;
4514 buffer_info->length = adapter->rx_buffer_len;
4516 buffer_info->dma = dma_map_single(&pdev->dev,
4518 buffer_info->length,
4520 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4522 buffer_info->skb = NULL;
4523 buffer_info->dma = 0;
4524 adapter->alloc_rx_buff_failed++;
4525 break; /* while !buffer_info->skb */
4528 /* XXX if it was allocated cleanly it will never map to a
4532 /* Fix for errata 23, can't cross 64kB boundary */
4533 if (!e1000_check_64k_bound(adapter,
4534 (void *)(unsigned long)buffer_info->dma,
4535 adapter->rx_buffer_len)) {
4536 e_err(rx_err, "dma align check failed: %u bytes at "
4537 "%p\n", adapter->rx_buffer_len,
4538 (void *)(unsigned long)buffer_info->dma);
4540 buffer_info->skb = NULL;
4542 dma_unmap_single(&pdev->dev, buffer_info->dma,
4543 adapter->rx_buffer_len,
4545 buffer_info->dma = 0;
4547 adapter->alloc_rx_buff_failed++;
4548 break; /* while !buffer_info->skb */
4550 rx_desc = E1000_RX_DESC(*rx_ring, i);
4551 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4553 if (unlikely(++i == rx_ring->count))
4555 buffer_info = &rx_ring->buffer_info[i];
4558 if (likely(rx_ring->next_to_use != i)) {
4559 rx_ring->next_to_use = i;
4560 if (unlikely(i-- == 0))
4561 i = (rx_ring->count - 1);
4563 /* Force memory writes to complete before letting h/w
4564 * know there are new descriptors to fetch. (Only
4565 * applicable for weak-ordered memory model archs,
4569 writel(i, hw->hw_addr + rx_ring->rdt);
4574 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4577 static void e1000_smartspeed(struct e1000_adapter *adapter)
4579 struct e1000_hw *hw = &adapter->hw;
4583 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4584 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4587 if (adapter->smartspeed == 0) {
4588 /* If Master/Slave config fault is asserted twice,
4589 * we assume back-to-back
4591 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4592 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4593 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4594 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4595 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4596 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4597 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4598 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4600 adapter->smartspeed++;
4601 if (!e1000_phy_setup_autoneg(hw) &&
4602 !e1000_read_phy_reg(hw, PHY_CTRL,
4604 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4605 MII_CR_RESTART_AUTO_NEG);
4606 e1000_write_phy_reg(hw, PHY_CTRL,
4611 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4612 /* If still no link, perhaps using 2/3 pair cable */
4613 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4614 phy_ctrl |= CR_1000T_MS_ENABLE;
4615 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4616 if (!e1000_phy_setup_autoneg(hw) &&
4617 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4618 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4619 MII_CR_RESTART_AUTO_NEG);
4620 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4623 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4624 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4625 adapter->smartspeed = 0;
4634 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4640 return e1000_mii_ioctl(netdev, ifr, cmd);
4652 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4655 struct e1000_adapter *adapter = netdev_priv(netdev);
4656 struct e1000_hw *hw = &adapter->hw;
4657 struct mii_ioctl_data *data = if_mii(ifr);
4660 unsigned long flags;
4662 if (hw->media_type != e1000_media_type_copper)
4667 data->phy_id = hw->phy_addr;
4670 spin_lock_irqsave(&adapter->stats_lock, flags);
4671 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4673 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4676 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4679 if (data->reg_num & ~(0x1F))
4681 mii_reg = data->val_in;
4682 spin_lock_irqsave(&adapter->stats_lock, flags);
4683 if (e1000_write_phy_reg(hw, data->reg_num,
4685 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4688 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4689 if (hw->media_type == e1000_media_type_copper) {
4690 switch (data->reg_num) {
4692 if (mii_reg & MII_CR_POWER_DOWN)
4694 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4696 hw->autoneg_advertised = 0x2F;
4701 else if (mii_reg & 0x2000)
4705 retval = e1000_set_spd_dplx(
4713 if (netif_running(adapter->netdev))
4714 e1000_reinit_locked(adapter);
4716 e1000_reset(adapter);
4718 case M88E1000_PHY_SPEC_CTRL:
4719 case M88E1000_EXT_PHY_SPEC_CTRL:
4720 if (e1000_phy_reset(hw))
4725 switch (data->reg_num) {
4727 if (mii_reg & MII_CR_POWER_DOWN)
4729 if (netif_running(adapter->netdev))
4730 e1000_reinit_locked(adapter);
4732 e1000_reset(adapter);
4740 return E1000_SUCCESS;
4743 void e1000_pci_set_mwi(struct e1000_hw *hw)
4745 struct e1000_adapter *adapter = hw->back;
4746 int ret_val = pci_set_mwi(adapter->pdev);
4749 e_err(probe, "Error in setting MWI\n");
4752 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4754 struct e1000_adapter *adapter = hw->back;
4756 pci_clear_mwi(adapter->pdev);
4759 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4761 struct e1000_adapter *adapter = hw->back;
4762 return pcix_get_mmrbc(adapter->pdev);
4765 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4767 struct e1000_adapter *adapter = hw->back;
4768 pcix_set_mmrbc(adapter->pdev, mmrbc);
4771 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4776 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4780 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4785 static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4786 netdev_features_t features)
4788 struct e1000_hw *hw = &adapter->hw;
4792 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
4793 /* enable VLAN tag insert/strip */
4794 ctrl |= E1000_CTRL_VME;
4796 /* disable VLAN tag insert/strip */
4797 ctrl &= ~E1000_CTRL_VME;
4801 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4804 struct e1000_hw *hw = &adapter->hw;
4807 if (!test_bit(__E1000_DOWN, &adapter->flags))
4808 e1000_irq_disable(adapter);
4810 __e1000_vlan_mode(adapter, adapter->netdev->features);
4812 /* enable VLAN receive filtering */
4814 rctl &= ~E1000_RCTL_CFIEN;
4815 if (!(adapter->netdev->flags & IFF_PROMISC))
4816 rctl |= E1000_RCTL_VFE;
4818 e1000_update_mng_vlan(adapter);
4820 /* disable VLAN receive filtering */
4822 rctl &= ~E1000_RCTL_VFE;
4826 if (!test_bit(__E1000_DOWN, &adapter->flags))
4827 e1000_irq_enable(adapter);
4830 static void e1000_vlan_mode(struct net_device *netdev,
4831 netdev_features_t features)
4833 struct e1000_adapter *adapter = netdev_priv(netdev);
4835 if (!test_bit(__E1000_DOWN, &adapter->flags))
4836 e1000_irq_disable(adapter);
4838 __e1000_vlan_mode(adapter, features);
4840 if (!test_bit(__E1000_DOWN, &adapter->flags))
4841 e1000_irq_enable(adapter);
4844 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
4845 __be16 proto, u16 vid)
4847 struct e1000_adapter *adapter = netdev_priv(netdev);
4848 struct e1000_hw *hw = &adapter->hw;
4851 if ((hw->mng_cookie.status &
4852 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4853 (vid == adapter->mng_vlan_id))
4856 if (!e1000_vlan_used(adapter))
4857 e1000_vlan_filter_on_off(adapter, true);
4859 /* add VID to filter table */
4860 index = (vid >> 5) & 0x7F;
4861 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4862 vfta |= (1 << (vid & 0x1F));
4863 e1000_write_vfta(hw, index, vfta);
4865 set_bit(vid, adapter->active_vlans);
4870 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
4871 __be16 proto, u16 vid)
4873 struct e1000_adapter *adapter = netdev_priv(netdev);
4874 struct e1000_hw *hw = &adapter->hw;
4877 if (!test_bit(__E1000_DOWN, &adapter->flags))
4878 e1000_irq_disable(adapter);
4879 if (!test_bit(__E1000_DOWN, &adapter->flags))
4880 e1000_irq_enable(adapter);
4882 /* remove VID from filter table */
4883 index = (vid >> 5) & 0x7F;
4884 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4885 vfta &= ~(1 << (vid & 0x1F));
4886 e1000_write_vfta(hw, index, vfta);
4888 clear_bit(vid, adapter->active_vlans);
4890 if (!e1000_vlan_used(adapter))
4891 e1000_vlan_filter_on_off(adapter, false);
4896 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4900 if (!e1000_vlan_used(adapter))
4903 e1000_vlan_filter_on_off(adapter, true);
4904 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4905 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
4908 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4910 struct e1000_hw *hw = &adapter->hw;
4914 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4915 * for the switch() below to work
4917 if ((spd & 1) || (dplx & ~1))
4920 /* Fiber NICs only allow 1000 gbps Full duplex */
4921 if ((hw->media_type == e1000_media_type_fiber) &&
4922 spd != SPEED_1000 &&
4923 dplx != DUPLEX_FULL)
4926 switch (spd + dplx) {
4927 case SPEED_10 + DUPLEX_HALF:
4928 hw->forced_speed_duplex = e1000_10_half;
4930 case SPEED_10 + DUPLEX_FULL:
4931 hw->forced_speed_duplex = e1000_10_full;
4933 case SPEED_100 + DUPLEX_HALF:
4934 hw->forced_speed_duplex = e1000_100_half;
4936 case SPEED_100 + DUPLEX_FULL:
4937 hw->forced_speed_duplex = e1000_100_full;
4939 case SPEED_1000 + DUPLEX_FULL:
4941 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4943 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4948 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
4949 hw->mdix = AUTO_ALL_MODES;
4954 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4958 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4960 struct net_device *netdev = pci_get_drvdata(pdev);
4961 struct e1000_adapter *adapter = netdev_priv(netdev);
4962 struct e1000_hw *hw = &adapter->hw;
4963 u32 ctrl, ctrl_ext, rctl, status;
4964 u32 wufc = adapter->wol;
4969 netif_device_detach(netdev);
4971 if (netif_running(netdev)) {
4972 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4973 e1000_down(adapter);
4977 retval = pci_save_state(pdev);
4982 status = er32(STATUS);
4983 if (status & E1000_STATUS_LU)
4984 wufc &= ~E1000_WUFC_LNKC;
4987 e1000_setup_rctl(adapter);
4988 e1000_set_rx_mode(netdev);
4992 /* turn on all-multi mode if wake on multicast is enabled */
4993 if (wufc & E1000_WUFC_MC)
4994 rctl |= E1000_RCTL_MPE;
4996 /* enable receives in the hardware */
4997 ew32(RCTL, rctl | E1000_RCTL_EN);
4999 if (hw->mac_type >= e1000_82540) {
5001 /* advertise wake from D3Cold */
5002 #define E1000_CTRL_ADVD3WUC 0x00100000
5003 /* phy power management enable */
5004 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5005 ctrl |= E1000_CTRL_ADVD3WUC |
5006 E1000_CTRL_EN_PHY_PWR_MGMT;
5010 if (hw->media_type == e1000_media_type_fiber ||
5011 hw->media_type == e1000_media_type_internal_serdes) {
5012 /* keep the laser running in D3 */
5013 ctrl_ext = er32(CTRL_EXT);
5014 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5015 ew32(CTRL_EXT, ctrl_ext);
5018 ew32(WUC, E1000_WUC_PME_EN);
5025 e1000_release_manageability(adapter);
5027 *enable_wake = !!wufc;
5029 /* make sure adapter isn't asleep if manageability is enabled */
5030 if (adapter->en_mng_pt)
5031 *enable_wake = true;
5033 if (netif_running(netdev))
5034 e1000_free_irq(adapter);
5036 pci_disable_device(pdev);
5042 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5047 retval = __e1000_shutdown(pdev, &wake);
5052 pci_prepare_to_sleep(pdev);
5054 pci_wake_from_d3(pdev, false);
5055 pci_set_power_state(pdev, PCI_D3hot);
5061 static int e1000_resume(struct pci_dev *pdev)
5063 struct net_device *netdev = pci_get_drvdata(pdev);
5064 struct e1000_adapter *adapter = netdev_priv(netdev);
5065 struct e1000_hw *hw = &adapter->hw;
5068 pci_set_power_state(pdev, PCI_D0);
5069 pci_restore_state(pdev);
5070 pci_save_state(pdev);
5072 if (adapter->need_ioport)
5073 err = pci_enable_device(pdev);
5075 err = pci_enable_device_mem(pdev);
5077 pr_err("Cannot enable PCI device from suspend\n");
5080 pci_set_master(pdev);
5082 pci_enable_wake(pdev, PCI_D3hot, 0);
5083 pci_enable_wake(pdev, PCI_D3cold, 0);
5085 if (netif_running(netdev)) {
5086 err = e1000_request_irq(adapter);
5091 e1000_power_up_phy(adapter);
5092 e1000_reset(adapter);
5095 e1000_init_manageability(adapter);
5097 if (netif_running(netdev))
5100 netif_device_attach(netdev);
5106 static void e1000_shutdown(struct pci_dev *pdev)
5110 __e1000_shutdown(pdev, &wake);
5112 if (system_state == SYSTEM_POWER_OFF) {
5113 pci_wake_from_d3(pdev, wake);
5114 pci_set_power_state(pdev, PCI_D3hot);
5118 #ifdef CONFIG_NET_POLL_CONTROLLER
5119 /* Polling 'interrupt' - used by things like netconsole to send skbs
5120 * without having to re-enable interrupts. It's not called while
5121 * the interrupt routine is executing.
5123 static void e1000_netpoll(struct net_device *netdev)
5125 struct e1000_adapter *adapter = netdev_priv(netdev);
5127 disable_irq(adapter->pdev->irq);
5128 e1000_intr(adapter->pdev->irq, netdev);
5129 enable_irq(adapter->pdev->irq);
5134 * e1000_io_error_detected - called when PCI error is detected
5135 * @pdev: Pointer to PCI device
5136 * @state: The current pci connection state
5138 * This function is called after a PCI bus error affecting
5139 * this device has been detected.
5141 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5142 pci_channel_state_t state)
5144 struct net_device *netdev = pci_get_drvdata(pdev);
5145 struct e1000_adapter *adapter = netdev_priv(netdev);
5147 netif_device_detach(netdev);
5149 if (state == pci_channel_io_perm_failure)
5150 return PCI_ERS_RESULT_DISCONNECT;
5152 if (netif_running(netdev))
5153 e1000_down(adapter);
5154 pci_disable_device(pdev);
5156 /* Request a slot slot reset. */
5157 return PCI_ERS_RESULT_NEED_RESET;
5161 * e1000_io_slot_reset - called after the pci bus has been reset.
5162 * @pdev: Pointer to PCI device
5164 * Restart the card from scratch, as if from a cold-boot. Implementation
5165 * resembles the first-half of the e1000_resume routine.
5167 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5169 struct net_device *netdev = pci_get_drvdata(pdev);
5170 struct e1000_adapter *adapter = netdev_priv(netdev);
5171 struct e1000_hw *hw = &adapter->hw;
5174 if (adapter->need_ioport)
5175 err = pci_enable_device(pdev);
5177 err = pci_enable_device_mem(pdev);
5179 pr_err("Cannot re-enable PCI device after reset.\n");
5180 return PCI_ERS_RESULT_DISCONNECT;
5182 pci_set_master(pdev);
5184 pci_enable_wake(pdev, PCI_D3hot, 0);
5185 pci_enable_wake(pdev, PCI_D3cold, 0);
5187 e1000_reset(adapter);
5190 return PCI_ERS_RESULT_RECOVERED;
5194 * e1000_io_resume - called when traffic can start flowing again.
5195 * @pdev: Pointer to PCI device
5197 * This callback is called when the error recovery driver tells us that
5198 * its OK to resume normal operation. Implementation resembles the
5199 * second-half of the e1000_resume routine.
5201 static void e1000_io_resume(struct pci_dev *pdev)
5203 struct net_device *netdev = pci_get_drvdata(pdev);
5204 struct e1000_adapter *adapter = netdev_priv(netdev);
5206 e1000_init_manageability(adapter);
5208 if (netif_running(netdev)) {
5209 if (e1000_up(adapter)) {
5210 pr_info("can't bring device back up after reset\n");
5215 netif_device_attach(netdev);