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 const struct pci_device_id e1000_pci_tbl[] = {
50 INTEL_E1000_ETHERNET_DEVICE(0x1000),
51 INTEL_E1000_ETHERNET_DEVICE(0x1001),
52 INTEL_E1000_ETHERNET_DEVICE(0x1004),
53 INTEL_E1000_ETHERNET_DEVICE(0x1008),
54 INTEL_E1000_ETHERNET_DEVICE(0x1009),
55 INTEL_E1000_ETHERNET_DEVICE(0x100C),
56 INTEL_E1000_ETHERNET_DEVICE(0x100D),
57 INTEL_E1000_ETHERNET_DEVICE(0x100E),
58 INTEL_E1000_ETHERNET_DEVICE(0x100F),
59 INTEL_E1000_ETHERNET_DEVICE(0x1010),
60 INTEL_E1000_ETHERNET_DEVICE(0x1011),
61 INTEL_E1000_ETHERNET_DEVICE(0x1012),
62 INTEL_E1000_ETHERNET_DEVICE(0x1013),
63 INTEL_E1000_ETHERNET_DEVICE(0x1014),
64 INTEL_E1000_ETHERNET_DEVICE(0x1015),
65 INTEL_E1000_ETHERNET_DEVICE(0x1016),
66 INTEL_E1000_ETHERNET_DEVICE(0x1017),
67 INTEL_E1000_ETHERNET_DEVICE(0x1018),
68 INTEL_E1000_ETHERNET_DEVICE(0x1019),
69 INTEL_E1000_ETHERNET_DEVICE(0x101A),
70 INTEL_E1000_ETHERNET_DEVICE(0x101D),
71 INTEL_E1000_ETHERNET_DEVICE(0x101E),
72 INTEL_E1000_ETHERNET_DEVICE(0x1026),
73 INTEL_E1000_ETHERNET_DEVICE(0x1027),
74 INTEL_E1000_ETHERNET_DEVICE(0x1028),
75 INTEL_E1000_ETHERNET_DEVICE(0x1075),
76 INTEL_E1000_ETHERNET_DEVICE(0x1076),
77 INTEL_E1000_ETHERNET_DEVICE(0x1077),
78 INTEL_E1000_ETHERNET_DEVICE(0x1078),
79 INTEL_E1000_ETHERNET_DEVICE(0x1079),
80 INTEL_E1000_ETHERNET_DEVICE(0x107A),
81 INTEL_E1000_ETHERNET_DEVICE(0x107B),
82 INTEL_E1000_ETHERNET_DEVICE(0x107C),
83 INTEL_E1000_ETHERNET_DEVICE(0x108A),
84 INTEL_E1000_ETHERNET_DEVICE(0x1099),
85 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
86 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
87 /* required last entry */
91 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
93 int e1000_up(struct e1000_adapter *adapter);
94 void e1000_down(struct e1000_adapter *adapter);
95 void e1000_reinit_locked(struct e1000_adapter *adapter);
96 void e1000_reset(struct e1000_adapter *adapter);
97 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
98 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
99 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
100 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
101 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
102 struct e1000_tx_ring *txdr);
103 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
104 struct e1000_rx_ring *rxdr);
105 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
106 struct e1000_tx_ring *tx_ring);
107 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
108 struct e1000_rx_ring *rx_ring);
109 void e1000_update_stats(struct e1000_adapter *adapter);
111 static int e1000_init_module(void);
112 static void e1000_exit_module(void);
113 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
114 static void e1000_remove(struct pci_dev *pdev);
115 static int e1000_alloc_queues(struct e1000_adapter *adapter);
116 static int e1000_sw_init(struct e1000_adapter *adapter);
117 static int e1000_open(struct net_device *netdev);
118 static int e1000_close(struct net_device *netdev);
119 static void e1000_configure_tx(struct e1000_adapter *adapter);
120 static void e1000_configure_rx(struct e1000_adapter *adapter);
121 static void e1000_setup_rctl(struct e1000_adapter *adapter);
122 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
123 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
124 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
125 struct e1000_tx_ring *tx_ring);
126 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
127 struct e1000_rx_ring *rx_ring);
128 static void e1000_set_rx_mode(struct net_device *netdev);
129 static void e1000_update_phy_info_task(struct work_struct *work);
130 static void e1000_watchdog(struct work_struct *work);
131 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
132 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
133 struct net_device *netdev);
134 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
135 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
136 static int e1000_set_mac(struct net_device *netdev, void *p);
137 static irqreturn_t e1000_intr(int irq, void *data);
138 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
139 struct e1000_tx_ring *tx_ring);
140 static int e1000_clean(struct napi_struct *napi, int budget);
141 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
142 struct e1000_rx_ring *rx_ring,
143 int *work_done, int work_to_do);
144 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
145 struct e1000_rx_ring *rx_ring,
146 int *work_done, int work_to_do);
147 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
148 struct e1000_rx_ring *rx_ring,
150 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
151 struct e1000_rx_ring *rx_ring,
153 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
154 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
156 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
157 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
158 static void e1000_tx_timeout(struct net_device *dev);
159 static void e1000_reset_task(struct work_struct *work);
160 static void e1000_smartspeed(struct e1000_adapter *adapter);
161 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
162 struct sk_buff *skb);
164 static bool e1000_vlan_used(struct e1000_adapter *adapter);
165 static void e1000_vlan_mode(struct net_device *netdev,
166 netdev_features_t features);
167 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
169 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
170 __be16 proto, u16 vid);
171 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
172 __be16 proto, u16 vid);
173 static void e1000_restore_vlan(struct e1000_adapter *adapter);
176 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
177 static int e1000_resume(struct pci_dev *pdev);
179 static void e1000_shutdown(struct pci_dev *pdev);
181 #ifdef CONFIG_NET_POLL_CONTROLLER
182 /* for netdump / net console */
183 static void e1000_netpoll (struct net_device *netdev);
186 #define COPYBREAK_DEFAULT 256
187 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
188 module_param(copybreak, uint, 0644);
189 MODULE_PARM_DESC(copybreak,
190 "Maximum size of packet that is copied to a new buffer on receive");
192 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
193 pci_channel_state_t state);
194 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
195 static void e1000_io_resume(struct pci_dev *pdev);
197 static const struct pci_error_handlers e1000_err_handler = {
198 .error_detected = e1000_io_error_detected,
199 .slot_reset = e1000_io_slot_reset,
200 .resume = e1000_io_resume,
203 static struct pci_driver e1000_driver = {
204 .name = e1000_driver_name,
205 .id_table = e1000_pci_tbl,
206 .probe = e1000_probe,
207 .remove = e1000_remove,
209 /* Power Management Hooks */
210 .suspend = e1000_suspend,
211 .resume = e1000_resume,
213 .shutdown = e1000_shutdown,
214 .err_handler = &e1000_err_handler
217 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
218 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
219 MODULE_LICENSE("GPL");
220 MODULE_VERSION(DRV_VERSION);
222 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
223 static int debug = -1;
224 module_param(debug, int, 0);
225 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
228 * e1000_get_hw_dev - return device
229 * used by hardware layer to print debugging information
232 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
234 struct e1000_adapter *adapter = hw->back;
235 return adapter->netdev;
239 * e1000_init_module - Driver Registration Routine
241 * e1000_init_module is the first routine called when the driver is
242 * loaded. All it does is register with the PCI subsystem.
244 static int __init e1000_init_module(void)
247 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
249 pr_info("%s\n", e1000_copyright);
251 ret = pci_register_driver(&e1000_driver);
252 if (copybreak != COPYBREAK_DEFAULT) {
254 pr_info("copybreak disabled\n");
256 pr_info("copybreak enabled for "
257 "packets <= %u bytes\n", copybreak);
262 module_init(e1000_init_module);
265 * e1000_exit_module - Driver Exit Cleanup Routine
267 * e1000_exit_module is called just before the driver is removed
270 static void __exit e1000_exit_module(void)
272 pci_unregister_driver(&e1000_driver);
275 module_exit(e1000_exit_module);
277 static int e1000_request_irq(struct e1000_adapter *adapter)
279 struct net_device *netdev = adapter->netdev;
280 irq_handler_t handler = e1000_intr;
281 int irq_flags = IRQF_SHARED;
284 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
287 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
293 static void e1000_free_irq(struct e1000_adapter *adapter)
295 struct net_device *netdev = adapter->netdev;
297 free_irq(adapter->pdev->irq, netdev);
301 * e1000_irq_disable - Mask off interrupt generation on the NIC
302 * @adapter: board private structure
304 static void e1000_irq_disable(struct e1000_adapter *adapter)
306 struct e1000_hw *hw = &adapter->hw;
310 synchronize_irq(adapter->pdev->irq);
314 * e1000_irq_enable - Enable default interrupt generation settings
315 * @adapter: board private structure
317 static void e1000_irq_enable(struct e1000_adapter *adapter)
319 struct e1000_hw *hw = &adapter->hw;
321 ew32(IMS, IMS_ENABLE_MASK);
325 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
327 struct e1000_hw *hw = &adapter->hw;
328 struct net_device *netdev = adapter->netdev;
329 u16 vid = hw->mng_cookie.vlan_id;
330 u16 old_vid = adapter->mng_vlan_id;
332 if (!e1000_vlan_used(adapter))
335 if (!test_bit(vid, adapter->active_vlans)) {
336 if (hw->mng_cookie.status &
337 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
338 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
339 adapter->mng_vlan_id = vid;
341 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
343 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
345 !test_bit(old_vid, adapter->active_vlans))
346 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
349 adapter->mng_vlan_id = vid;
353 static void e1000_init_manageability(struct e1000_adapter *adapter)
355 struct e1000_hw *hw = &adapter->hw;
357 if (adapter->en_mng_pt) {
358 u32 manc = er32(MANC);
360 /* disable hardware interception of ARP */
361 manc &= ~(E1000_MANC_ARP_EN);
367 static void e1000_release_manageability(struct e1000_adapter *adapter)
369 struct e1000_hw *hw = &adapter->hw;
371 if (adapter->en_mng_pt) {
372 u32 manc = er32(MANC);
374 /* re-enable hardware interception of ARP */
375 manc |= E1000_MANC_ARP_EN;
382 * e1000_configure - configure the hardware for RX and TX
383 * @adapter = private board structure
385 static void e1000_configure(struct e1000_adapter *adapter)
387 struct net_device *netdev = adapter->netdev;
390 e1000_set_rx_mode(netdev);
392 e1000_restore_vlan(adapter);
393 e1000_init_manageability(adapter);
395 e1000_configure_tx(adapter);
396 e1000_setup_rctl(adapter);
397 e1000_configure_rx(adapter);
398 /* call E1000_DESC_UNUSED which always leaves
399 * at least 1 descriptor unused to make sure
400 * next_to_use != next_to_clean
402 for (i = 0; i < adapter->num_rx_queues; i++) {
403 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
404 adapter->alloc_rx_buf(adapter, ring,
405 E1000_DESC_UNUSED(ring));
409 int e1000_up(struct e1000_adapter *adapter)
411 struct e1000_hw *hw = &adapter->hw;
413 /* hardware has been reset, we need to reload some things */
414 e1000_configure(adapter);
416 clear_bit(__E1000_DOWN, &adapter->flags);
418 napi_enable(&adapter->napi);
420 e1000_irq_enable(adapter);
422 netif_wake_queue(adapter->netdev);
424 /* fire a link change interrupt to start the watchdog */
425 ew32(ICS, E1000_ICS_LSC);
430 * e1000_power_up_phy - restore link in case the phy was powered down
431 * @adapter: address of board private structure
433 * The phy may be powered down to save power and turn off link when the
434 * driver is unloaded and wake on lan is not enabled (among others)
435 * *** this routine MUST be followed by a call to e1000_reset ***
437 void e1000_power_up_phy(struct e1000_adapter *adapter)
439 struct e1000_hw *hw = &adapter->hw;
442 /* Just clear the power down bit to wake the phy back up */
443 if (hw->media_type == e1000_media_type_copper) {
444 /* according to the manual, the phy will retain its
445 * settings across a power-down/up cycle
447 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
448 mii_reg &= ~MII_CR_POWER_DOWN;
449 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
453 static void e1000_power_down_phy(struct e1000_adapter *adapter)
455 struct e1000_hw *hw = &adapter->hw;
457 /* Power down the PHY so no link is implied when interface is down *
458 * The PHY cannot be powered down if any of the following is true *
461 * (c) SoL/IDER session is active
463 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
464 hw->media_type == e1000_media_type_copper) {
467 switch (hw->mac_type) {
470 case e1000_82545_rev_3:
473 case e1000_82546_rev_3:
475 case e1000_82541_rev_2:
477 case e1000_82547_rev_2:
478 if (er32(MANC) & E1000_MANC_SMBUS_EN)
484 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
485 mii_reg |= MII_CR_POWER_DOWN;
486 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
493 static void e1000_down_and_stop(struct e1000_adapter *adapter)
495 set_bit(__E1000_DOWN, &adapter->flags);
497 cancel_delayed_work_sync(&adapter->watchdog_task);
500 * Since the watchdog task can reschedule other tasks, we should cancel
501 * it first, otherwise we can run into the situation when a work is
502 * still running after the adapter has been turned down.
505 cancel_delayed_work_sync(&adapter->phy_info_task);
506 cancel_delayed_work_sync(&adapter->fifo_stall_task);
508 /* Only kill reset task if adapter is not resetting */
509 if (!test_bit(__E1000_RESETTING, &adapter->flags))
510 cancel_work_sync(&adapter->reset_task);
513 void e1000_down(struct e1000_adapter *adapter)
515 struct e1000_hw *hw = &adapter->hw;
516 struct net_device *netdev = adapter->netdev;
520 /* disable receives in the hardware */
522 ew32(RCTL, rctl & ~E1000_RCTL_EN);
523 /* flush and sleep below */
525 netif_tx_disable(netdev);
527 /* disable transmits in the hardware */
529 tctl &= ~E1000_TCTL_EN;
531 /* flush both disables and wait for them to finish */
535 napi_disable(&adapter->napi);
537 e1000_irq_disable(adapter);
539 /* Setting DOWN must be after irq_disable to prevent
540 * a screaming interrupt. Setting DOWN also prevents
541 * tasks from rescheduling.
543 e1000_down_and_stop(adapter);
545 adapter->link_speed = 0;
546 adapter->link_duplex = 0;
547 netif_carrier_off(netdev);
549 e1000_reset(adapter);
550 e1000_clean_all_tx_rings(adapter);
551 e1000_clean_all_rx_rings(adapter);
554 void e1000_reinit_locked(struct e1000_adapter *adapter)
556 WARN_ON(in_interrupt());
557 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
561 clear_bit(__E1000_RESETTING, &adapter->flags);
564 void e1000_reset(struct e1000_adapter *adapter)
566 struct e1000_hw *hw = &adapter->hw;
567 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
568 bool legacy_pba_adjust = false;
571 /* Repartition Pba for greater than 9k mtu
572 * To take effect CTRL.RST is required.
575 switch (hw->mac_type) {
576 case e1000_82542_rev2_0:
577 case e1000_82542_rev2_1:
582 case e1000_82541_rev_2:
583 legacy_pba_adjust = true;
587 case e1000_82545_rev_3:
590 case e1000_82546_rev_3:
594 case e1000_82547_rev_2:
595 legacy_pba_adjust = true;
598 case e1000_undefined:
603 if (legacy_pba_adjust) {
604 if (hw->max_frame_size > E1000_RXBUFFER_8192)
605 pba -= 8; /* allocate more FIFO for Tx */
607 if (hw->mac_type == e1000_82547) {
608 adapter->tx_fifo_head = 0;
609 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
610 adapter->tx_fifo_size =
611 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
612 atomic_set(&adapter->tx_fifo_stall, 0);
614 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
615 /* adjust PBA for jumbo frames */
618 /* To maintain wire speed transmits, the Tx FIFO should be
619 * large enough to accommodate two full transmit packets,
620 * rounded up to the next 1KB and expressed in KB. Likewise,
621 * the Rx FIFO should be large enough to accommodate at least
622 * one full receive packet and is similarly rounded up and
626 /* upper 16 bits has Tx packet buffer allocation size in KB */
627 tx_space = pba >> 16;
628 /* lower 16 bits has Rx packet buffer allocation size in KB */
630 /* the Tx fifo also stores 16 bytes of information about the Tx
631 * but don't include ethernet FCS because hardware appends it
633 min_tx_space = (hw->max_frame_size +
634 sizeof(struct e1000_tx_desc) -
636 min_tx_space = ALIGN(min_tx_space, 1024);
638 /* software strips receive CRC, so leave room for it */
639 min_rx_space = hw->max_frame_size;
640 min_rx_space = ALIGN(min_rx_space, 1024);
643 /* If current Tx allocation is less than the min Tx FIFO size,
644 * and the min Tx FIFO size is less than the current Rx FIFO
645 * allocation, take space away from current Rx allocation
647 if (tx_space < min_tx_space &&
648 ((min_tx_space - tx_space) < pba)) {
649 pba = pba - (min_tx_space - tx_space);
651 /* PCI/PCIx hardware has PBA alignment constraints */
652 switch (hw->mac_type) {
653 case e1000_82545 ... e1000_82546_rev_3:
654 pba &= ~(E1000_PBA_8K - 1);
660 /* if short on Rx space, Rx wins and must trump Tx
661 * adjustment or use Early Receive if available
663 if (pba < min_rx_space)
670 /* flow control settings:
671 * The high water mark must be low enough to fit one full frame
672 * (or the size used for early receive) above it in the Rx FIFO.
673 * Set it to the lower of:
674 * - 90% of the Rx FIFO size, and
675 * - the full Rx FIFO size minus the early receive size (for parts
676 * with ERT support assuming ERT set to E1000_ERT_2048), or
677 * - the full Rx FIFO size minus one full frame
679 hwm = min(((pba << 10) * 9 / 10),
680 ((pba << 10) - hw->max_frame_size));
682 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
683 hw->fc_low_water = hw->fc_high_water - 8;
684 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
686 hw->fc = hw->original_fc;
688 /* Allow time for pending master requests to run */
690 if (hw->mac_type >= e1000_82544)
693 if (e1000_init_hw(hw))
694 e_dev_err("Hardware Error\n");
695 e1000_update_mng_vlan(adapter);
697 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
698 if (hw->mac_type >= e1000_82544 &&
700 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
701 u32 ctrl = er32(CTRL);
702 /* clear phy power management bit if we are in gig only mode,
703 * which if enabled will attempt negotiation to 100Mb, which
704 * can cause a loss of link at power off or driver unload
706 ctrl &= ~E1000_CTRL_SWDPIN3;
710 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
711 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
713 e1000_reset_adaptive(hw);
714 e1000_phy_get_info(hw, &adapter->phy_info);
716 e1000_release_manageability(adapter);
719 /* Dump the eeprom for users having checksum issues */
720 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
722 struct net_device *netdev = adapter->netdev;
723 struct ethtool_eeprom eeprom;
724 const struct ethtool_ops *ops = netdev->ethtool_ops;
727 u16 csum_old, csum_new = 0;
729 eeprom.len = ops->get_eeprom_len(netdev);
732 data = kmalloc(eeprom.len, GFP_KERNEL);
736 ops->get_eeprom(netdev, &eeprom, data);
738 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
739 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
740 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
741 csum_new += data[i] + (data[i + 1] << 8);
742 csum_new = EEPROM_SUM - csum_new;
744 pr_err("/*********************/\n");
745 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
746 pr_err("Calculated : 0x%04x\n", csum_new);
748 pr_err("Offset Values\n");
749 pr_err("======== ======\n");
750 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
752 pr_err("Include this output when contacting your support provider.\n");
753 pr_err("This is not a software error! Something bad happened to\n");
754 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
755 pr_err("result in further problems, possibly loss of data,\n");
756 pr_err("corruption or system hangs!\n");
757 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
758 pr_err("which is invalid and requires you to set the proper MAC\n");
759 pr_err("address manually before continuing to enable this network\n");
760 pr_err("device. Please inspect the EEPROM dump and report the\n");
761 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
762 pr_err("/*********************/\n");
768 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
769 * @pdev: PCI device information struct
771 * Return true if an adapter needs ioport resources
773 static int e1000_is_need_ioport(struct pci_dev *pdev)
775 switch (pdev->device) {
776 case E1000_DEV_ID_82540EM:
777 case E1000_DEV_ID_82540EM_LOM:
778 case E1000_DEV_ID_82540EP:
779 case E1000_DEV_ID_82540EP_LOM:
780 case E1000_DEV_ID_82540EP_LP:
781 case E1000_DEV_ID_82541EI:
782 case E1000_DEV_ID_82541EI_MOBILE:
783 case E1000_DEV_ID_82541ER:
784 case E1000_DEV_ID_82541ER_LOM:
785 case E1000_DEV_ID_82541GI:
786 case E1000_DEV_ID_82541GI_LF:
787 case E1000_DEV_ID_82541GI_MOBILE:
788 case E1000_DEV_ID_82544EI_COPPER:
789 case E1000_DEV_ID_82544EI_FIBER:
790 case E1000_DEV_ID_82544GC_COPPER:
791 case E1000_DEV_ID_82544GC_LOM:
792 case E1000_DEV_ID_82545EM_COPPER:
793 case E1000_DEV_ID_82545EM_FIBER:
794 case E1000_DEV_ID_82546EB_COPPER:
795 case E1000_DEV_ID_82546EB_FIBER:
796 case E1000_DEV_ID_82546EB_QUAD_COPPER:
803 static netdev_features_t e1000_fix_features(struct net_device *netdev,
804 netdev_features_t features)
806 /* Since there is no support for separate Rx/Tx vlan accel
807 * enable/disable make sure Tx flag is always in same state as Rx.
809 if (features & NETIF_F_HW_VLAN_CTAG_RX)
810 features |= NETIF_F_HW_VLAN_CTAG_TX;
812 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
817 static int e1000_set_features(struct net_device *netdev,
818 netdev_features_t features)
820 struct e1000_adapter *adapter = netdev_priv(netdev);
821 netdev_features_t changed = features ^ netdev->features;
823 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
824 e1000_vlan_mode(netdev, features);
826 if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL)))
829 netdev->features = features;
830 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
832 if (netif_running(netdev))
833 e1000_reinit_locked(adapter);
835 e1000_reset(adapter);
840 static const struct net_device_ops e1000_netdev_ops = {
841 .ndo_open = e1000_open,
842 .ndo_stop = e1000_close,
843 .ndo_start_xmit = e1000_xmit_frame,
844 .ndo_get_stats = e1000_get_stats,
845 .ndo_set_rx_mode = e1000_set_rx_mode,
846 .ndo_set_mac_address = e1000_set_mac,
847 .ndo_tx_timeout = e1000_tx_timeout,
848 .ndo_change_mtu = e1000_change_mtu,
849 .ndo_do_ioctl = e1000_ioctl,
850 .ndo_validate_addr = eth_validate_addr,
851 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
852 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
853 #ifdef CONFIG_NET_POLL_CONTROLLER
854 .ndo_poll_controller = e1000_netpoll,
856 .ndo_fix_features = e1000_fix_features,
857 .ndo_set_features = e1000_set_features,
861 * e1000_init_hw_struct - initialize members of hw struct
862 * @adapter: board private struct
863 * @hw: structure used by e1000_hw.c
865 * Factors out initialization of the e1000_hw struct to its own function
866 * that can be called very early at init (just after struct allocation).
867 * Fields are initialized based on PCI device information and
868 * OS network device settings (MTU size).
869 * Returns negative error codes if MAC type setup fails.
871 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
874 struct pci_dev *pdev = adapter->pdev;
876 /* PCI config space info */
877 hw->vendor_id = pdev->vendor;
878 hw->device_id = pdev->device;
879 hw->subsystem_vendor_id = pdev->subsystem_vendor;
880 hw->subsystem_id = pdev->subsystem_device;
881 hw->revision_id = pdev->revision;
883 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
885 hw->max_frame_size = adapter->netdev->mtu +
886 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
887 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
889 /* identify the MAC */
890 if (e1000_set_mac_type(hw)) {
891 e_err(probe, "Unknown MAC Type\n");
895 switch (hw->mac_type) {
900 case e1000_82541_rev_2:
901 case e1000_82547_rev_2:
902 hw->phy_init_script = 1;
906 e1000_set_media_type(hw);
907 e1000_get_bus_info(hw);
909 hw->wait_autoneg_complete = false;
910 hw->tbi_compatibility_en = true;
911 hw->adaptive_ifs = true;
915 if (hw->media_type == e1000_media_type_copper) {
916 hw->mdix = AUTO_ALL_MODES;
917 hw->disable_polarity_correction = false;
918 hw->master_slave = E1000_MASTER_SLAVE;
925 * e1000_probe - Device Initialization Routine
926 * @pdev: PCI device information struct
927 * @ent: entry in e1000_pci_tbl
929 * Returns 0 on success, negative on failure
931 * e1000_probe initializes an adapter identified by a pci_dev structure.
932 * The OS initialization, configuring of the adapter private structure,
933 * and a hardware reset occur.
935 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
937 struct net_device *netdev;
938 struct e1000_adapter *adapter;
941 static int cards_found = 0;
942 static int global_quad_port_a = 0; /* global ksp3 port a indication */
943 int i, err, pci_using_dac;
946 u16 eeprom_apme_mask = E1000_EEPROM_APME;
947 int bars, need_ioport;
949 /* do not allocate ioport bars when not needed */
950 need_ioport = e1000_is_need_ioport(pdev);
952 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
953 err = pci_enable_device(pdev);
955 bars = pci_select_bars(pdev, IORESOURCE_MEM);
956 err = pci_enable_device_mem(pdev);
961 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
965 pci_set_master(pdev);
966 err = pci_save_state(pdev);
968 goto err_alloc_etherdev;
971 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
973 goto err_alloc_etherdev;
975 SET_NETDEV_DEV(netdev, &pdev->dev);
977 pci_set_drvdata(pdev, netdev);
978 adapter = netdev_priv(netdev);
979 adapter->netdev = netdev;
980 adapter->pdev = pdev;
981 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
982 adapter->bars = bars;
983 adapter->need_ioport = need_ioport;
989 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
993 if (adapter->need_ioport) {
994 for (i = BAR_1; i <= BAR_5; i++) {
995 if (pci_resource_len(pdev, i) == 0)
997 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
998 hw->io_base = pci_resource_start(pdev, i);
1004 /* make ready for any if (hw->...) below */
1005 err = e1000_init_hw_struct(adapter, hw);
1009 /* there is a workaround being applied below that limits
1010 * 64-bit DMA addresses to 64-bit hardware. There are some
1011 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1014 if ((hw->bus_type == e1000_bus_type_pcix) &&
1015 !dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
1018 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1020 pr_err("No usable DMA config, aborting\n");
1025 netdev->netdev_ops = &e1000_netdev_ops;
1026 e1000_set_ethtool_ops(netdev);
1027 netdev->watchdog_timeo = 5 * HZ;
1028 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1030 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1032 adapter->bd_number = cards_found;
1034 /* setup the private structure */
1036 err = e1000_sw_init(adapter);
1041 if (hw->mac_type == e1000_ce4100) {
1042 hw->ce4100_gbe_mdio_base_virt =
1043 ioremap(pci_resource_start(pdev, BAR_1),
1044 pci_resource_len(pdev, BAR_1));
1046 if (!hw->ce4100_gbe_mdio_base_virt)
1047 goto err_mdio_ioremap;
1050 if (hw->mac_type >= e1000_82543) {
1051 netdev->hw_features = NETIF_F_SG |
1053 NETIF_F_HW_VLAN_CTAG_RX;
1054 netdev->features = NETIF_F_HW_VLAN_CTAG_TX |
1055 NETIF_F_HW_VLAN_CTAG_FILTER;
1058 if ((hw->mac_type >= e1000_82544) &&
1059 (hw->mac_type != e1000_82547))
1060 netdev->hw_features |= NETIF_F_TSO;
1062 netdev->priv_flags |= IFF_SUPP_NOFCS;
1064 netdev->features |= netdev->hw_features;
1065 netdev->hw_features |= (NETIF_F_RXCSUM |
1069 if (pci_using_dac) {
1070 netdev->features |= NETIF_F_HIGHDMA;
1071 netdev->vlan_features |= NETIF_F_HIGHDMA;
1074 netdev->vlan_features |= (NETIF_F_TSO |
1078 netdev->priv_flags |= IFF_UNICAST_FLT;
1080 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1082 /* initialize eeprom parameters */
1083 if (e1000_init_eeprom_params(hw)) {
1084 e_err(probe, "EEPROM initialization failed\n");
1088 /* before reading the EEPROM, reset the controller to
1089 * put the device in a known good starting state
1094 /* make sure the EEPROM is good */
1095 if (e1000_validate_eeprom_checksum(hw) < 0) {
1096 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1097 e1000_dump_eeprom(adapter);
1098 /* set MAC address to all zeroes to invalidate and temporary
1099 * disable this device for the user. This blocks regular
1100 * traffic while still permitting ethtool ioctls from reaching
1101 * the hardware as well as allowing the user to run the
1102 * interface after manually setting a hw addr using
1105 memset(hw->mac_addr, 0, netdev->addr_len);
1107 /* copy the MAC address out of the EEPROM */
1108 if (e1000_read_mac_addr(hw))
1109 e_err(probe, "EEPROM Read Error\n");
1111 /* don't block initalization here due to bad MAC address */
1112 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1114 if (!is_valid_ether_addr(netdev->dev_addr))
1115 e_err(probe, "Invalid MAC Address\n");
1118 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1119 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1120 e1000_82547_tx_fifo_stall_task);
1121 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1122 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1124 e1000_check_options(adapter);
1126 /* Initial Wake on LAN setting
1127 * If APM wake is enabled in the EEPROM,
1128 * enable the ACPI Magic Packet filter
1131 switch (hw->mac_type) {
1132 case e1000_82542_rev2_0:
1133 case e1000_82542_rev2_1:
1137 e1000_read_eeprom(hw,
1138 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1139 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1142 case e1000_82546_rev_3:
1143 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1144 e1000_read_eeprom(hw,
1145 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1150 e1000_read_eeprom(hw,
1151 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1154 if (eeprom_data & eeprom_apme_mask)
1155 adapter->eeprom_wol |= E1000_WUFC_MAG;
1157 /* now that we have the eeprom settings, apply the special cases
1158 * where the eeprom may be wrong or the board simply won't support
1159 * wake on lan on a particular port
1161 switch (pdev->device) {
1162 case E1000_DEV_ID_82546GB_PCIE:
1163 adapter->eeprom_wol = 0;
1165 case E1000_DEV_ID_82546EB_FIBER:
1166 case E1000_DEV_ID_82546GB_FIBER:
1167 /* Wake events only supported on port A for dual fiber
1168 * regardless of eeprom setting
1170 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1171 adapter->eeprom_wol = 0;
1173 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1174 /* if quad port adapter, disable WoL on all but port A */
1175 if (global_quad_port_a != 0)
1176 adapter->eeprom_wol = 0;
1178 adapter->quad_port_a = true;
1179 /* Reset for multiple quad port adapters */
1180 if (++global_quad_port_a == 4)
1181 global_quad_port_a = 0;
1185 /* initialize the wol settings based on the eeprom settings */
1186 adapter->wol = adapter->eeprom_wol;
1187 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1189 /* Auto detect PHY address */
1190 if (hw->mac_type == e1000_ce4100) {
1191 for (i = 0; i < 32; i++) {
1193 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1194 if (tmp == 0 || tmp == 0xFF) {
1203 /* reset the hardware with the new settings */
1204 e1000_reset(adapter);
1206 strcpy(netdev->name, "eth%d");
1207 err = register_netdev(netdev);
1211 e1000_vlan_filter_on_off(adapter, false);
1213 /* print bus type/speed/width info */
1214 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1215 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1216 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1217 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1218 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1219 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1220 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1223 /* carrier off reporting is important to ethtool even BEFORE open */
1224 netif_carrier_off(netdev);
1226 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1233 e1000_phy_hw_reset(hw);
1235 if (hw->flash_address)
1236 iounmap(hw->flash_address);
1237 kfree(adapter->tx_ring);
1238 kfree(adapter->rx_ring);
1242 iounmap(hw->ce4100_gbe_mdio_base_virt);
1243 iounmap(hw->hw_addr);
1245 free_netdev(netdev);
1247 pci_release_selected_regions(pdev, bars);
1249 pci_disable_device(pdev);
1254 * e1000_remove - Device Removal Routine
1255 * @pdev: PCI device information struct
1257 * e1000_remove is called by the PCI subsystem to alert the driver
1258 * that it should release a PCI device. The could be caused by a
1259 * Hot-Plug event, or because the driver is going to be removed from
1262 static void e1000_remove(struct pci_dev *pdev)
1264 struct net_device *netdev = pci_get_drvdata(pdev);
1265 struct e1000_adapter *adapter = netdev_priv(netdev);
1266 struct e1000_hw *hw = &adapter->hw;
1268 e1000_down_and_stop(adapter);
1269 e1000_release_manageability(adapter);
1271 unregister_netdev(netdev);
1273 e1000_phy_hw_reset(hw);
1275 kfree(adapter->tx_ring);
1276 kfree(adapter->rx_ring);
1278 if (hw->mac_type == e1000_ce4100)
1279 iounmap(hw->ce4100_gbe_mdio_base_virt);
1280 iounmap(hw->hw_addr);
1281 if (hw->flash_address)
1282 iounmap(hw->flash_address);
1283 pci_release_selected_regions(pdev, adapter->bars);
1285 free_netdev(netdev);
1287 pci_disable_device(pdev);
1291 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1292 * @adapter: board private structure to initialize
1294 * e1000_sw_init initializes the Adapter private data structure.
1295 * e1000_init_hw_struct MUST be called before this function
1297 static int e1000_sw_init(struct e1000_adapter *adapter)
1299 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1301 adapter->num_tx_queues = 1;
1302 adapter->num_rx_queues = 1;
1304 if (e1000_alloc_queues(adapter)) {
1305 e_err(probe, "Unable to allocate memory for queues\n");
1309 /* Explicitly disable IRQ since the NIC can be in any state. */
1310 e1000_irq_disable(adapter);
1312 spin_lock_init(&adapter->stats_lock);
1314 set_bit(__E1000_DOWN, &adapter->flags);
1320 * e1000_alloc_queues - Allocate memory for all rings
1321 * @adapter: board private structure to initialize
1323 * We allocate one ring per queue at run-time since we don't know the
1324 * number of queues at compile-time.
1326 static int e1000_alloc_queues(struct e1000_adapter *adapter)
1328 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1329 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1330 if (!adapter->tx_ring)
1333 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1334 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1335 if (!adapter->rx_ring) {
1336 kfree(adapter->tx_ring);
1340 return E1000_SUCCESS;
1344 * e1000_open - Called when a network interface is made active
1345 * @netdev: network interface device structure
1347 * Returns 0 on success, negative value on failure
1349 * The open entry point is called when a network interface is made
1350 * active by the system (IFF_UP). At this point all resources needed
1351 * for transmit and receive operations are allocated, the interrupt
1352 * handler is registered with the OS, the watchdog task is started,
1353 * and the stack is notified that the interface is ready.
1355 static int e1000_open(struct net_device *netdev)
1357 struct e1000_adapter *adapter = netdev_priv(netdev);
1358 struct e1000_hw *hw = &adapter->hw;
1361 /* disallow open during test */
1362 if (test_bit(__E1000_TESTING, &adapter->flags))
1365 netif_carrier_off(netdev);
1367 /* allocate transmit descriptors */
1368 err = e1000_setup_all_tx_resources(adapter);
1372 /* allocate receive descriptors */
1373 err = e1000_setup_all_rx_resources(adapter);
1377 e1000_power_up_phy(adapter);
1379 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1380 if ((hw->mng_cookie.status &
1381 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1382 e1000_update_mng_vlan(adapter);
1385 /* before we allocate an interrupt, we must be ready to handle it.
1386 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1387 * as soon as we call pci_request_irq, so we have to setup our
1388 * clean_rx handler before we do so.
1390 e1000_configure(adapter);
1392 err = e1000_request_irq(adapter);
1396 /* From here on the code is the same as e1000_up() */
1397 clear_bit(__E1000_DOWN, &adapter->flags);
1399 napi_enable(&adapter->napi);
1401 e1000_irq_enable(adapter);
1403 netif_start_queue(netdev);
1405 /* fire a link status change interrupt to start the watchdog */
1406 ew32(ICS, E1000_ICS_LSC);
1408 return E1000_SUCCESS;
1411 e1000_power_down_phy(adapter);
1412 e1000_free_all_rx_resources(adapter);
1414 e1000_free_all_tx_resources(adapter);
1416 e1000_reset(adapter);
1422 * e1000_close - Disables a network interface
1423 * @netdev: network interface device structure
1425 * Returns 0, this is not allowed to fail
1427 * The close entry point is called when an interface is de-activated
1428 * by the OS. The hardware is still under the drivers control, but
1429 * needs to be disabled. A global MAC reset is issued to stop the
1430 * hardware, and all transmit and receive resources are freed.
1432 static int e1000_close(struct net_device *netdev)
1434 struct e1000_adapter *adapter = netdev_priv(netdev);
1435 struct e1000_hw *hw = &adapter->hw;
1436 int count = E1000_CHECK_RESET_COUNT;
1438 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
1439 usleep_range(10000, 20000);
1441 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1442 e1000_down(adapter);
1443 e1000_power_down_phy(adapter);
1444 e1000_free_irq(adapter);
1446 e1000_free_all_tx_resources(adapter);
1447 e1000_free_all_rx_resources(adapter);
1449 /* kill manageability vlan ID if supported, but not if a vlan with
1450 * the same ID is registered on the host OS (let 8021q kill it)
1452 if ((hw->mng_cookie.status &
1453 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1454 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1455 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
1456 adapter->mng_vlan_id);
1463 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1464 * @adapter: address of board private structure
1465 * @start: address of beginning of memory
1466 * @len: length of memory
1468 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1471 struct e1000_hw *hw = &adapter->hw;
1472 unsigned long begin = (unsigned long)start;
1473 unsigned long end = begin + len;
1475 /* First rev 82545 and 82546 need to not allow any memory
1476 * write location to cross 64k boundary due to errata 23
1478 if (hw->mac_type == e1000_82545 ||
1479 hw->mac_type == e1000_ce4100 ||
1480 hw->mac_type == e1000_82546) {
1481 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1488 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1489 * @adapter: board private structure
1490 * @txdr: tx descriptor ring (for a specific queue) to setup
1492 * Return 0 on success, negative on failure
1494 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1495 struct e1000_tx_ring *txdr)
1497 struct pci_dev *pdev = adapter->pdev;
1500 size = sizeof(struct e1000_tx_buffer) * txdr->count;
1501 txdr->buffer_info = vzalloc(size);
1502 if (!txdr->buffer_info)
1505 /* round up to nearest 4K */
1507 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1508 txdr->size = ALIGN(txdr->size, 4096);
1510 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1514 vfree(txdr->buffer_info);
1518 /* Fix for errata 23, can't cross 64kB boundary */
1519 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1520 void *olddesc = txdr->desc;
1521 dma_addr_t olddma = txdr->dma;
1522 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1523 txdr->size, txdr->desc);
1524 /* Try again, without freeing the previous */
1525 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1526 &txdr->dma, GFP_KERNEL);
1527 /* Failed allocation, critical failure */
1529 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1531 goto setup_tx_desc_die;
1534 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1536 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1538 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1540 e_err(probe, "Unable to allocate aligned memory "
1541 "for the transmit descriptor ring\n");
1542 vfree(txdr->buffer_info);
1545 /* Free old allocation, new allocation was successful */
1546 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1550 memset(txdr->desc, 0, txdr->size);
1552 txdr->next_to_use = 0;
1553 txdr->next_to_clean = 0;
1559 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1560 * (Descriptors) for all queues
1561 * @adapter: board private structure
1563 * Return 0 on success, negative on failure
1565 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1569 for (i = 0; i < adapter->num_tx_queues; i++) {
1570 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1572 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1573 for (i-- ; i >= 0; i--)
1574 e1000_free_tx_resources(adapter,
1575 &adapter->tx_ring[i]);
1584 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1585 * @adapter: board private structure
1587 * Configure the Tx unit of the MAC after a reset.
1589 static void e1000_configure_tx(struct e1000_adapter *adapter)
1592 struct e1000_hw *hw = &adapter->hw;
1593 u32 tdlen, tctl, tipg;
1596 /* Setup the HW Tx Head and Tail descriptor pointers */
1598 switch (adapter->num_tx_queues) {
1601 tdba = adapter->tx_ring[0].dma;
1602 tdlen = adapter->tx_ring[0].count *
1603 sizeof(struct e1000_tx_desc);
1605 ew32(TDBAH, (tdba >> 32));
1606 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1609 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ?
1610 E1000_TDH : E1000_82542_TDH);
1611 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ?
1612 E1000_TDT : E1000_82542_TDT);
1616 /* Set the default values for the Tx Inter Packet Gap timer */
1617 if ((hw->media_type == e1000_media_type_fiber ||
1618 hw->media_type == e1000_media_type_internal_serdes))
1619 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1621 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1623 switch (hw->mac_type) {
1624 case e1000_82542_rev2_0:
1625 case e1000_82542_rev2_1:
1626 tipg = DEFAULT_82542_TIPG_IPGT;
1627 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1628 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1631 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1632 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1635 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1636 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1639 /* Set the Tx Interrupt Delay register */
1641 ew32(TIDV, adapter->tx_int_delay);
1642 if (hw->mac_type >= e1000_82540)
1643 ew32(TADV, adapter->tx_abs_int_delay);
1645 /* Program the Transmit Control Register */
1648 tctl &= ~E1000_TCTL_CT;
1649 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1650 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1652 e1000_config_collision_dist(hw);
1654 /* Setup Transmit Descriptor Settings for eop descriptor */
1655 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1657 /* only set IDE if we are delaying interrupts using the timers */
1658 if (adapter->tx_int_delay)
1659 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1661 if (hw->mac_type < e1000_82543)
1662 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1664 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1666 /* Cache if we're 82544 running in PCI-X because we'll
1667 * need this to apply a workaround later in the send path.
1669 if (hw->mac_type == e1000_82544 &&
1670 hw->bus_type == e1000_bus_type_pcix)
1671 adapter->pcix_82544 = true;
1678 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1679 * @adapter: board private structure
1680 * @rxdr: rx descriptor ring (for a specific queue) to setup
1682 * Returns 0 on success, negative on failure
1684 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1685 struct e1000_rx_ring *rxdr)
1687 struct pci_dev *pdev = adapter->pdev;
1690 size = sizeof(struct e1000_rx_buffer) * rxdr->count;
1691 rxdr->buffer_info = vzalloc(size);
1692 if (!rxdr->buffer_info)
1695 desc_len = sizeof(struct e1000_rx_desc);
1697 /* Round up to nearest 4K */
1699 rxdr->size = rxdr->count * desc_len;
1700 rxdr->size = ALIGN(rxdr->size, 4096);
1702 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1706 vfree(rxdr->buffer_info);
1710 /* Fix for errata 23, can't cross 64kB boundary */
1711 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1712 void *olddesc = rxdr->desc;
1713 dma_addr_t olddma = rxdr->dma;
1714 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1715 rxdr->size, rxdr->desc);
1716 /* Try again, without freeing the previous */
1717 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1718 &rxdr->dma, GFP_KERNEL);
1719 /* Failed allocation, critical failure */
1721 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1723 goto setup_rx_desc_die;
1726 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1728 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1730 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1732 e_err(probe, "Unable to allocate aligned memory for "
1733 "the Rx descriptor ring\n");
1734 goto setup_rx_desc_die;
1736 /* Free old allocation, new allocation was successful */
1737 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1741 memset(rxdr->desc, 0, rxdr->size);
1743 rxdr->next_to_clean = 0;
1744 rxdr->next_to_use = 0;
1745 rxdr->rx_skb_top = NULL;
1751 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1752 * (Descriptors) for all queues
1753 * @adapter: board private structure
1755 * Return 0 on success, negative on failure
1757 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1761 for (i = 0; i < adapter->num_rx_queues; i++) {
1762 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1764 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1765 for (i-- ; i >= 0; i--)
1766 e1000_free_rx_resources(adapter,
1767 &adapter->rx_ring[i]);
1776 * e1000_setup_rctl - configure the receive control registers
1777 * @adapter: Board private structure
1779 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1781 struct e1000_hw *hw = &adapter->hw;
1786 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1788 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1789 E1000_RCTL_RDMTS_HALF |
1790 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1792 if (hw->tbi_compatibility_on == 1)
1793 rctl |= E1000_RCTL_SBP;
1795 rctl &= ~E1000_RCTL_SBP;
1797 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1798 rctl &= ~E1000_RCTL_LPE;
1800 rctl |= E1000_RCTL_LPE;
1802 /* Setup buffer sizes */
1803 rctl &= ~E1000_RCTL_SZ_4096;
1804 rctl |= E1000_RCTL_BSEX;
1805 switch (adapter->rx_buffer_len) {
1806 case E1000_RXBUFFER_2048:
1808 rctl |= E1000_RCTL_SZ_2048;
1809 rctl &= ~E1000_RCTL_BSEX;
1811 case E1000_RXBUFFER_4096:
1812 rctl |= E1000_RCTL_SZ_4096;
1814 case E1000_RXBUFFER_8192:
1815 rctl |= E1000_RCTL_SZ_8192;
1817 case E1000_RXBUFFER_16384:
1818 rctl |= E1000_RCTL_SZ_16384;
1822 /* This is useful for sniffing bad packets. */
1823 if (adapter->netdev->features & NETIF_F_RXALL) {
1824 /* UPE and MPE will be handled by normal PROMISC logic
1825 * in e1000e_set_rx_mode
1827 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
1828 E1000_RCTL_BAM | /* RX All Bcast Pkts */
1829 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
1831 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
1832 E1000_RCTL_DPF | /* Allow filtered pause */
1833 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
1834 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1835 * and that breaks VLANs.
1843 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1844 * @adapter: board private structure
1846 * Configure the Rx unit of the MAC after a reset.
1848 static void e1000_configure_rx(struct e1000_adapter *adapter)
1851 struct e1000_hw *hw = &adapter->hw;
1852 u32 rdlen, rctl, rxcsum;
1854 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1855 rdlen = adapter->rx_ring[0].count *
1856 sizeof(struct e1000_rx_desc);
1857 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1858 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1860 rdlen = adapter->rx_ring[0].count *
1861 sizeof(struct e1000_rx_desc);
1862 adapter->clean_rx = e1000_clean_rx_irq;
1863 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1866 /* disable receives while setting up the descriptors */
1868 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1870 /* set the Receive Delay Timer Register */
1871 ew32(RDTR, adapter->rx_int_delay);
1873 if (hw->mac_type >= e1000_82540) {
1874 ew32(RADV, adapter->rx_abs_int_delay);
1875 if (adapter->itr_setting != 0)
1876 ew32(ITR, 1000000000 / (adapter->itr * 256));
1879 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1880 * the Base and Length of the Rx Descriptor Ring
1882 switch (adapter->num_rx_queues) {
1885 rdba = adapter->rx_ring[0].dma;
1887 ew32(RDBAH, (rdba >> 32));
1888 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1891 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ?
1892 E1000_RDH : E1000_82542_RDH);
1893 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ?
1894 E1000_RDT : E1000_82542_RDT);
1898 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1899 if (hw->mac_type >= e1000_82543) {
1900 rxcsum = er32(RXCSUM);
1901 if (adapter->rx_csum)
1902 rxcsum |= E1000_RXCSUM_TUOFL;
1904 /* don't need to clear IPPCSE as it defaults to 0 */
1905 rxcsum &= ~E1000_RXCSUM_TUOFL;
1906 ew32(RXCSUM, rxcsum);
1909 /* Enable Receives */
1910 ew32(RCTL, rctl | E1000_RCTL_EN);
1914 * e1000_free_tx_resources - Free Tx Resources per Queue
1915 * @adapter: board private structure
1916 * @tx_ring: Tx descriptor ring for a specific queue
1918 * Free all transmit software resources
1920 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1921 struct e1000_tx_ring *tx_ring)
1923 struct pci_dev *pdev = adapter->pdev;
1925 e1000_clean_tx_ring(adapter, tx_ring);
1927 vfree(tx_ring->buffer_info);
1928 tx_ring->buffer_info = NULL;
1930 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1933 tx_ring->desc = NULL;
1937 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1938 * @adapter: board private structure
1940 * Free all transmit software resources
1942 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1946 for (i = 0; i < adapter->num_tx_queues; i++)
1947 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1951 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1952 struct e1000_tx_buffer *buffer_info)
1954 if (buffer_info->dma) {
1955 if (buffer_info->mapped_as_page)
1956 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1957 buffer_info->length, DMA_TO_DEVICE);
1959 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1960 buffer_info->length,
1962 buffer_info->dma = 0;
1964 if (buffer_info->skb) {
1965 dev_kfree_skb_any(buffer_info->skb);
1966 buffer_info->skb = NULL;
1968 buffer_info->time_stamp = 0;
1969 /* buffer_info must be completely set up in the transmit path */
1973 * e1000_clean_tx_ring - Free Tx Buffers
1974 * @adapter: board private structure
1975 * @tx_ring: ring to be cleaned
1977 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1978 struct e1000_tx_ring *tx_ring)
1980 struct e1000_hw *hw = &adapter->hw;
1981 struct e1000_tx_buffer *buffer_info;
1985 /* Free all the Tx ring sk_buffs */
1987 for (i = 0; i < tx_ring->count; i++) {
1988 buffer_info = &tx_ring->buffer_info[i];
1989 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1992 netdev_reset_queue(adapter->netdev);
1993 size = sizeof(struct e1000_tx_buffer) * tx_ring->count;
1994 memset(tx_ring->buffer_info, 0, size);
1996 /* Zero out the descriptor ring */
1998 memset(tx_ring->desc, 0, tx_ring->size);
2000 tx_ring->next_to_use = 0;
2001 tx_ring->next_to_clean = 0;
2002 tx_ring->last_tx_tso = false;
2004 writel(0, hw->hw_addr + tx_ring->tdh);
2005 writel(0, hw->hw_addr + tx_ring->tdt);
2009 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2010 * @adapter: board private structure
2012 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2016 for (i = 0; i < adapter->num_tx_queues; i++)
2017 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2021 * e1000_free_rx_resources - Free Rx Resources
2022 * @adapter: board private structure
2023 * @rx_ring: ring to clean the resources from
2025 * Free all receive software resources
2027 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2028 struct e1000_rx_ring *rx_ring)
2030 struct pci_dev *pdev = adapter->pdev;
2032 e1000_clean_rx_ring(adapter, rx_ring);
2034 vfree(rx_ring->buffer_info);
2035 rx_ring->buffer_info = NULL;
2037 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2040 rx_ring->desc = NULL;
2044 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2045 * @adapter: board private structure
2047 * Free all receive software resources
2049 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2053 for (i = 0; i < adapter->num_rx_queues; i++)
2054 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2057 #define E1000_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN)
2058 static unsigned int e1000_frag_len(const struct e1000_adapter *a)
2060 return SKB_DATA_ALIGN(a->rx_buffer_len + E1000_HEADROOM) +
2061 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
2064 static void *e1000_alloc_frag(const struct e1000_adapter *a)
2066 unsigned int len = e1000_frag_len(a);
2067 u8 *data = netdev_alloc_frag(len);
2070 data += E1000_HEADROOM;
2074 static void e1000_free_frag(const void *data)
2076 put_page(virt_to_head_page(data));
2080 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2081 * @adapter: board private structure
2082 * @rx_ring: ring to free buffers from
2084 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2085 struct e1000_rx_ring *rx_ring)
2087 struct e1000_hw *hw = &adapter->hw;
2088 struct e1000_rx_buffer *buffer_info;
2089 struct pci_dev *pdev = adapter->pdev;
2093 /* Free all the Rx netfrags */
2094 for (i = 0; i < rx_ring->count; i++) {
2095 buffer_info = &rx_ring->buffer_info[i];
2096 if (adapter->clean_rx == e1000_clean_rx_irq) {
2097 if (buffer_info->dma)
2098 dma_unmap_single(&pdev->dev, buffer_info->dma,
2099 adapter->rx_buffer_len,
2101 if (buffer_info->rxbuf.data) {
2102 e1000_free_frag(buffer_info->rxbuf.data);
2103 buffer_info->rxbuf.data = NULL;
2105 } else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2106 if (buffer_info->dma)
2107 dma_unmap_page(&pdev->dev, buffer_info->dma,
2108 adapter->rx_buffer_len,
2110 if (buffer_info->rxbuf.page) {
2111 put_page(buffer_info->rxbuf.page);
2112 buffer_info->rxbuf.page = NULL;
2116 buffer_info->dma = 0;
2119 /* there also may be some cached data from a chained receive */
2120 napi_free_frags(&adapter->napi);
2121 rx_ring->rx_skb_top = NULL;
2123 size = sizeof(struct e1000_rx_buffer) * rx_ring->count;
2124 memset(rx_ring->buffer_info, 0, size);
2126 /* Zero out the descriptor ring */
2127 memset(rx_ring->desc, 0, rx_ring->size);
2129 rx_ring->next_to_clean = 0;
2130 rx_ring->next_to_use = 0;
2132 writel(0, hw->hw_addr + rx_ring->rdh);
2133 writel(0, hw->hw_addr + rx_ring->rdt);
2137 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2138 * @adapter: board private structure
2140 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2144 for (i = 0; i < adapter->num_rx_queues; i++)
2145 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2148 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2149 * and memory write and invalidate disabled for certain operations
2151 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2153 struct e1000_hw *hw = &adapter->hw;
2154 struct net_device *netdev = adapter->netdev;
2157 e1000_pci_clear_mwi(hw);
2160 rctl |= E1000_RCTL_RST;
2162 E1000_WRITE_FLUSH();
2165 if (netif_running(netdev))
2166 e1000_clean_all_rx_rings(adapter);
2169 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2171 struct e1000_hw *hw = &adapter->hw;
2172 struct net_device *netdev = adapter->netdev;
2176 rctl &= ~E1000_RCTL_RST;
2178 E1000_WRITE_FLUSH();
2181 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2182 e1000_pci_set_mwi(hw);
2184 if (netif_running(netdev)) {
2185 /* No need to loop, because 82542 supports only 1 queue */
2186 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2187 e1000_configure_rx(adapter);
2188 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2193 * e1000_set_mac - Change the Ethernet Address of the NIC
2194 * @netdev: network interface device structure
2195 * @p: pointer to an address structure
2197 * Returns 0 on success, negative on failure
2199 static int e1000_set_mac(struct net_device *netdev, void *p)
2201 struct e1000_adapter *adapter = netdev_priv(netdev);
2202 struct e1000_hw *hw = &adapter->hw;
2203 struct sockaddr *addr = p;
2205 if (!is_valid_ether_addr(addr->sa_data))
2206 return -EADDRNOTAVAIL;
2208 /* 82542 2.0 needs to be in reset to write receive address registers */
2210 if (hw->mac_type == e1000_82542_rev2_0)
2211 e1000_enter_82542_rst(adapter);
2213 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2214 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2216 e1000_rar_set(hw, hw->mac_addr, 0);
2218 if (hw->mac_type == e1000_82542_rev2_0)
2219 e1000_leave_82542_rst(adapter);
2225 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2226 * @netdev: network interface device structure
2228 * The set_rx_mode entry point is called whenever the unicast or multicast
2229 * address lists or the network interface flags are updated. This routine is
2230 * responsible for configuring the hardware for proper unicast, multicast,
2231 * promiscuous mode, and all-multi behavior.
2233 static void e1000_set_rx_mode(struct net_device *netdev)
2235 struct e1000_adapter *adapter = netdev_priv(netdev);
2236 struct e1000_hw *hw = &adapter->hw;
2237 struct netdev_hw_addr *ha;
2238 bool use_uc = false;
2241 int i, rar_entries = E1000_RAR_ENTRIES;
2242 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2243 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2248 /* Check for Promiscuous and All Multicast modes */
2252 if (netdev->flags & IFF_PROMISC) {
2253 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2254 rctl &= ~E1000_RCTL_VFE;
2256 if (netdev->flags & IFF_ALLMULTI)
2257 rctl |= E1000_RCTL_MPE;
2259 rctl &= ~E1000_RCTL_MPE;
2260 /* Enable VLAN filter if there is a VLAN */
2261 if (e1000_vlan_used(adapter))
2262 rctl |= E1000_RCTL_VFE;
2265 if (netdev_uc_count(netdev) > rar_entries - 1) {
2266 rctl |= E1000_RCTL_UPE;
2267 } else if (!(netdev->flags & IFF_PROMISC)) {
2268 rctl &= ~E1000_RCTL_UPE;
2274 /* 82542 2.0 needs to be in reset to write receive address registers */
2276 if (hw->mac_type == e1000_82542_rev2_0)
2277 e1000_enter_82542_rst(adapter);
2279 /* load the first 14 addresses into the exact filters 1-14. Unicast
2280 * addresses take precedence to avoid disabling unicast filtering
2283 * RAR 0 is used for the station MAC address
2284 * if there are not 14 addresses, go ahead and clear the filters
2288 netdev_for_each_uc_addr(ha, netdev) {
2289 if (i == rar_entries)
2291 e1000_rar_set(hw, ha->addr, i++);
2294 netdev_for_each_mc_addr(ha, netdev) {
2295 if (i == rar_entries) {
2296 /* load any remaining addresses into the hash table */
2297 u32 hash_reg, hash_bit, mta;
2298 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2299 hash_reg = (hash_value >> 5) & 0x7F;
2300 hash_bit = hash_value & 0x1F;
2301 mta = (1 << hash_bit);
2302 mcarray[hash_reg] |= mta;
2304 e1000_rar_set(hw, ha->addr, i++);
2308 for (; i < rar_entries; i++) {
2309 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2310 E1000_WRITE_FLUSH();
2311 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2312 E1000_WRITE_FLUSH();
2315 /* write the hash table completely, write from bottom to avoid
2316 * both stupid write combining chipsets, and flushing each write
2318 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2319 /* If we are on an 82544 has an errata where writing odd
2320 * offsets overwrites the previous even offset, but writing
2321 * backwards over the range solves the issue by always
2322 * writing the odd offset first
2324 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2326 E1000_WRITE_FLUSH();
2328 if (hw->mac_type == e1000_82542_rev2_0)
2329 e1000_leave_82542_rst(adapter);
2335 * e1000_update_phy_info_task - get phy info
2336 * @work: work struct contained inside adapter struct
2338 * Need to wait a few seconds after link up to get diagnostic information from
2341 static void e1000_update_phy_info_task(struct work_struct *work)
2343 struct e1000_adapter *adapter = container_of(work,
2344 struct e1000_adapter,
2345 phy_info_task.work);
2347 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2351 * e1000_82547_tx_fifo_stall_task - task to complete work
2352 * @work: work struct contained inside adapter struct
2354 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2356 struct e1000_adapter *adapter = container_of(work,
2357 struct e1000_adapter,
2358 fifo_stall_task.work);
2359 struct e1000_hw *hw = &adapter->hw;
2360 struct net_device *netdev = adapter->netdev;
2363 if (atomic_read(&adapter->tx_fifo_stall)) {
2364 if ((er32(TDT) == er32(TDH)) &&
2365 (er32(TDFT) == er32(TDFH)) &&
2366 (er32(TDFTS) == er32(TDFHS))) {
2368 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2369 ew32(TDFT, adapter->tx_head_addr);
2370 ew32(TDFH, adapter->tx_head_addr);
2371 ew32(TDFTS, adapter->tx_head_addr);
2372 ew32(TDFHS, adapter->tx_head_addr);
2374 E1000_WRITE_FLUSH();
2376 adapter->tx_fifo_head = 0;
2377 atomic_set(&adapter->tx_fifo_stall, 0);
2378 netif_wake_queue(netdev);
2379 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2380 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2385 bool e1000_has_link(struct e1000_adapter *adapter)
2387 struct e1000_hw *hw = &adapter->hw;
2388 bool link_active = false;
2390 /* get_link_status is set on LSC (link status) interrupt or rx
2391 * sequence error interrupt (except on intel ce4100).
2392 * get_link_status will stay false until the
2393 * e1000_check_for_link establishes link for copper adapters
2396 switch (hw->media_type) {
2397 case e1000_media_type_copper:
2398 if (hw->mac_type == e1000_ce4100)
2399 hw->get_link_status = 1;
2400 if (hw->get_link_status) {
2401 e1000_check_for_link(hw);
2402 link_active = !hw->get_link_status;
2407 case e1000_media_type_fiber:
2408 e1000_check_for_link(hw);
2409 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2411 case e1000_media_type_internal_serdes:
2412 e1000_check_for_link(hw);
2413 link_active = hw->serdes_has_link;
2423 * e1000_watchdog - work function
2424 * @work: work struct contained inside adapter struct
2426 static void e1000_watchdog(struct work_struct *work)
2428 struct e1000_adapter *adapter = container_of(work,
2429 struct e1000_adapter,
2430 watchdog_task.work);
2431 struct e1000_hw *hw = &adapter->hw;
2432 struct net_device *netdev = adapter->netdev;
2433 struct e1000_tx_ring *txdr = adapter->tx_ring;
2436 link = e1000_has_link(adapter);
2437 if ((netif_carrier_ok(netdev)) && link)
2441 if (!netif_carrier_ok(netdev)) {
2444 /* update snapshot of PHY registers on LSC */
2445 e1000_get_speed_and_duplex(hw,
2446 &adapter->link_speed,
2447 &adapter->link_duplex);
2450 pr_info("%s NIC Link is Up %d Mbps %s, "
2451 "Flow Control: %s\n",
2453 adapter->link_speed,
2454 adapter->link_duplex == FULL_DUPLEX ?
2455 "Full Duplex" : "Half Duplex",
2456 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2457 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2458 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2459 E1000_CTRL_TFCE) ? "TX" : "None")));
2461 /* adjust timeout factor according to speed/duplex */
2462 adapter->tx_timeout_factor = 1;
2463 switch (adapter->link_speed) {
2466 adapter->tx_timeout_factor = 16;
2470 /* maybe add some timeout factor ? */
2474 /* enable transmits in the hardware */
2476 tctl |= E1000_TCTL_EN;
2479 netif_carrier_on(netdev);
2480 if (!test_bit(__E1000_DOWN, &adapter->flags))
2481 schedule_delayed_work(&adapter->phy_info_task,
2483 adapter->smartspeed = 0;
2486 if (netif_carrier_ok(netdev)) {
2487 adapter->link_speed = 0;
2488 adapter->link_duplex = 0;
2489 pr_info("%s NIC Link is Down\n",
2491 netif_carrier_off(netdev);
2493 if (!test_bit(__E1000_DOWN, &adapter->flags))
2494 schedule_delayed_work(&adapter->phy_info_task,
2498 e1000_smartspeed(adapter);
2502 e1000_update_stats(adapter);
2504 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2505 adapter->tpt_old = adapter->stats.tpt;
2506 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2507 adapter->colc_old = adapter->stats.colc;
2509 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2510 adapter->gorcl_old = adapter->stats.gorcl;
2511 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2512 adapter->gotcl_old = adapter->stats.gotcl;
2514 e1000_update_adaptive(hw);
2516 if (!netif_carrier_ok(netdev)) {
2517 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2518 /* We've lost link, so the controller stops DMA,
2519 * but we've got queued Tx work that's never going
2520 * to get done, so reset controller to flush Tx.
2521 * (Do the reset outside of interrupt context).
2523 adapter->tx_timeout_count++;
2524 schedule_work(&adapter->reset_task);
2525 /* exit immediately since reset is imminent */
2530 /* Simple mode for Interrupt Throttle Rate (ITR) */
2531 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2532 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2533 * Total asymmetrical Tx or Rx gets ITR=8000;
2534 * everyone else is between 2000-8000.
2536 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2537 u32 dif = (adapter->gotcl > adapter->gorcl ?
2538 adapter->gotcl - adapter->gorcl :
2539 adapter->gorcl - adapter->gotcl) / 10000;
2540 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2542 ew32(ITR, 1000000000 / (itr * 256));
2545 /* Cause software interrupt to ensure rx ring is cleaned */
2546 ew32(ICS, E1000_ICS_RXDMT0);
2548 /* Force detection of hung controller every watchdog period */
2549 adapter->detect_tx_hung = true;
2551 /* Reschedule the task */
2552 if (!test_bit(__E1000_DOWN, &adapter->flags))
2553 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2556 enum latency_range {
2560 latency_invalid = 255
2564 * e1000_update_itr - update the dynamic ITR value based on statistics
2565 * @adapter: pointer to adapter
2566 * @itr_setting: current adapter->itr
2567 * @packets: the number of packets during this measurement interval
2568 * @bytes: the number of bytes during this measurement interval
2570 * Stores a new ITR value based on packets and byte
2571 * counts during the last interrupt. The advantage of per interrupt
2572 * computation is faster updates and more accurate ITR for the current
2573 * traffic pattern. Constants in this function were computed
2574 * based on theoretical maximum wire speed and thresholds were set based
2575 * on testing data as well as attempting to minimize response time
2576 * while increasing bulk throughput.
2577 * this functionality is controlled by the InterruptThrottleRate module
2578 * parameter (see e1000_param.c)
2580 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2581 u16 itr_setting, int packets, int bytes)
2583 unsigned int retval = itr_setting;
2584 struct e1000_hw *hw = &adapter->hw;
2586 if (unlikely(hw->mac_type < e1000_82540))
2587 goto update_itr_done;
2590 goto update_itr_done;
2592 switch (itr_setting) {
2593 case lowest_latency:
2594 /* jumbo frames get bulk treatment*/
2595 if (bytes/packets > 8000)
2596 retval = bulk_latency;
2597 else if ((packets < 5) && (bytes > 512))
2598 retval = low_latency;
2600 case low_latency: /* 50 usec aka 20000 ints/s */
2601 if (bytes > 10000) {
2602 /* jumbo frames need bulk latency setting */
2603 if (bytes/packets > 8000)
2604 retval = bulk_latency;
2605 else if ((packets < 10) || ((bytes/packets) > 1200))
2606 retval = bulk_latency;
2607 else if ((packets > 35))
2608 retval = lowest_latency;
2609 } else if (bytes/packets > 2000)
2610 retval = bulk_latency;
2611 else if (packets <= 2 && bytes < 512)
2612 retval = lowest_latency;
2614 case bulk_latency: /* 250 usec aka 4000 ints/s */
2615 if (bytes > 25000) {
2617 retval = low_latency;
2618 } else if (bytes < 6000) {
2619 retval = low_latency;
2628 static void e1000_set_itr(struct e1000_adapter *adapter)
2630 struct e1000_hw *hw = &adapter->hw;
2632 u32 new_itr = adapter->itr;
2634 if (unlikely(hw->mac_type < e1000_82540))
2637 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2638 if (unlikely(adapter->link_speed != SPEED_1000)) {
2644 adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr,
2645 adapter->total_tx_packets,
2646 adapter->total_tx_bytes);
2647 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2648 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2649 adapter->tx_itr = low_latency;
2651 adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr,
2652 adapter->total_rx_packets,
2653 adapter->total_rx_bytes);
2654 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2655 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2656 adapter->rx_itr = low_latency;
2658 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2660 switch (current_itr) {
2661 /* counts and packets in update_itr are dependent on these numbers */
2662 case lowest_latency:
2666 new_itr = 20000; /* aka hwitr = ~200 */
2676 if (new_itr != adapter->itr) {
2677 /* this attempts to bias the interrupt rate towards Bulk
2678 * by adding intermediate steps when interrupt rate is
2681 new_itr = new_itr > adapter->itr ?
2682 min(adapter->itr + (new_itr >> 2), new_itr) :
2684 adapter->itr = new_itr;
2685 ew32(ITR, 1000000000 / (new_itr * 256));
2689 #define E1000_TX_FLAGS_CSUM 0x00000001
2690 #define E1000_TX_FLAGS_VLAN 0x00000002
2691 #define E1000_TX_FLAGS_TSO 0x00000004
2692 #define E1000_TX_FLAGS_IPV4 0x00000008
2693 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2694 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2695 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2697 static int e1000_tso(struct e1000_adapter *adapter,
2698 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2701 struct e1000_context_desc *context_desc;
2702 struct e1000_tx_buffer *buffer_info;
2705 u16 ipcse = 0, tucse, mss;
2706 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2708 if (skb_is_gso(skb)) {
2711 err = skb_cow_head(skb, 0);
2715 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2716 mss = skb_shinfo(skb)->gso_size;
2717 if (protocol == htons(ETH_P_IP)) {
2718 struct iphdr *iph = ip_hdr(skb);
2721 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2725 cmd_length = E1000_TXD_CMD_IP;
2726 ipcse = skb_transport_offset(skb) - 1;
2727 } else if (skb_is_gso_v6(skb)) {
2728 ipv6_hdr(skb)->payload_len = 0;
2729 tcp_hdr(skb)->check =
2730 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2731 &ipv6_hdr(skb)->daddr,
2735 ipcss = skb_network_offset(skb);
2736 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2737 tucss = skb_transport_offset(skb);
2738 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2741 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2742 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2744 i = tx_ring->next_to_use;
2745 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2746 buffer_info = &tx_ring->buffer_info[i];
2748 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2749 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2750 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2751 context_desc->upper_setup.tcp_fields.tucss = tucss;
2752 context_desc->upper_setup.tcp_fields.tucso = tucso;
2753 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2754 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2755 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2756 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2758 buffer_info->time_stamp = jiffies;
2759 buffer_info->next_to_watch = i;
2761 if (++i == tx_ring->count) i = 0;
2762 tx_ring->next_to_use = i;
2769 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2770 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2773 struct e1000_context_desc *context_desc;
2774 struct e1000_tx_buffer *buffer_info;
2777 u32 cmd_len = E1000_TXD_CMD_DEXT;
2779 if (skb->ip_summed != CHECKSUM_PARTIAL)
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_tx_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_tx_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;
3123 __be16 protocol = vlan_get_protocol(skb);
3125 /* This goes back to the question of how to logically map a Tx queue
3126 * to a flow. Right now, performance is impacted slightly negatively
3127 * if using multiple Tx queues. If the stack breaks away from a
3128 * single qdisc implementation, we can look at this again.
3130 tx_ring = adapter->tx_ring;
3132 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3133 * packets may get corrupted during padding by HW.
3134 * To WA this issue, pad all small packets manually.
3136 if (skb->len < ETH_ZLEN) {
3137 if (skb_pad(skb, ETH_ZLEN - skb->len))
3138 return NETDEV_TX_OK;
3139 skb->len = ETH_ZLEN;
3140 skb_set_tail_pointer(skb, ETH_ZLEN);
3143 mss = skb_shinfo(skb)->gso_size;
3144 /* The controller does a simple calculation to
3145 * make sure there is enough room in the FIFO before
3146 * initiating the DMA for each buffer. The calc is:
3147 * 4 = ceil(buffer len/mss). To make sure we don't
3148 * overrun the FIFO, adjust the max buffer len if mss
3153 max_per_txd = min(mss << 2, max_per_txd);
3154 max_txd_pwr = fls(max_per_txd) - 1;
3156 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3157 if (skb->data_len && hdr_len == len) {
3158 switch (hw->mac_type) {
3159 unsigned int pull_size;
3161 /* Make sure we have room to chop off 4 bytes,
3162 * and that the end alignment will work out to
3163 * this hardware's requirements
3164 * NOTE: this is a TSO only workaround
3165 * if end byte alignment not correct move us
3166 * into the next dword
3168 if ((unsigned long)(skb_tail_pointer(skb) - 1)
3172 pull_size = min((unsigned int)4, skb->data_len);
3173 if (!__pskb_pull_tail(skb, pull_size)) {
3174 e_err(drv, "__pskb_pull_tail "
3176 dev_kfree_skb_any(skb);
3177 return NETDEV_TX_OK;
3179 len = skb_headlen(skb);
3188 /* reserve a descriptor for the offload context */
3189 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3193 /* Controller Erratum workaround */
3194 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3197 count += TXD_USE_COUNT(len, max_txd_pwr);
3199 if (adapter->pcix_82544)
3202 /* work-around for errata 10 and it applies to all controllers
3203 * in PCI-X mode, so add one more descriptor to the count
3205 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3209 nr_frags = skb_shinfo(skb)->nr_frags;
3210 for (f = 0; f < nr_frags; f++)
3211 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3213 if (adapter->pcix_82544)
3216 /* need: count + 2 desc gap to keep tail from touching
3217 * head, otherwise try next time
3219 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3220 return NETDEV_TX_BUSY;
3222 if (unlikely((hw->mac_type == e1000_82547) &&
3223 (e1000_82547_fifo_workaround(adapter, skb)))) {
3224 netif_stop_queue(netdev);
3225 if (!test_bit(__E1000_DOWN, &adapter->flags))
3226 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3227 return NETDEV_TX_BUSY;
3230 if (vlan_tx_tag_present(skb)) {
3231 tx_flags |= E1000_TX_FLAGS_VLAN;
3232 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3235 first = tx_ring->next_to_use;
3237 tso = e1000_tso(adapter, tx_ring, skb, protocol);
3239 dev_kfree_skb_any(skb);
3240 return NETDEV_TX_OK;
3244 if (likely(hw->mac_type != e1000_82544))
3245 tx_ring->last_tx_tso = true;
3246 tx_flags |= E1000_TX_FLAGS_TSO;
3247 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb, protocol)))
3248 tx_flags |= E1000_TX_FLAGS_CSUM;
3250 if (protocol == htons(ETH_P_IP))
3251 tx_flags |= E1000_TX_FLAGS_IPV4;
3253 if (unlikely(skb->no_fcs))
3254 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3256 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3260 netdev_sent_queue(netdev, skb->len);
3261 skb_tx_timestamp(skb);
3263 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3264 /* Make sure there is space in the ring for the next send. */
3265 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3268 dev_kfree_skb_any(skb);
3269 tx_ring->buffer_info[first].time_stamp = 0;
3270 tx_ring->next_to_use = first;
3273 return NETDEV_TX_OK;
3276 #define NUM_REGS 38 /* 1 based count */
3277 static void e1000_regdump(struct e1000_adapter *adapter)
3279 struct e1000_hw *hw = &adapter->hw;
3281 u32 *regs_buff = regs;
3284 static const char * const reg_name[] = {
3286 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3287 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3288 "TIDV", "TXDCTL", "TADV", "TARC0",
3289 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3291 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3292 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3293 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3296 regs_buff[0] = er32(CTRL);
3297 regs_buff[1] = er32(STATUS);
3299 regs_buff[2] = er32(RCTL);
3300 regs_buff[3] = er32(RDLEN);
3301 regs_buff[4] = er32(RDH);
3302 regs_buff[5] = er32(RDT);
3303 regs_buff[6] = er32(RDTR);
3305 regs_buff[7] = er32(TCTL);
3306 regs_buff[8] = er32(TDBAL);
3307 regs_buff[9] = er32(TDBAH);
3308 regs_buff[10] = er32(TDLEN);
3309 regs_buff[11] = er32(TDH);
3310 regs_buff[12] = er32(TDT);
3311 regs_buff[13] = er32(TIDV);
3312 regs_buff[14] = er32(TXDCTL);
3313 regs_buff[15] = er32(TADV);
3314 regs_buff[16] = er32(TARC0);
3316 regs_buff[17] = er32(TDBAL1);
3317 regs_buff[18] = er32(TDBAH1);
3318 regs_buff[19] = er32(TDLEN1);
3319 regs_buff[20] = er32(TDH1);
3320 regs_buff[21] = er32(TDT1);
3321 regs_buff[22] = er32(TXDCTL1);
3322 regs_buff[23] = er32(TARC1);
3323 regs_buff[24] = er32(CTRL_EXT);
3324 regs_buff[25] = er32(ERT);
3325 regs_buff[26] = er32(RDBAL0);
3326 regs_buff[27] = er32(RDBAH0);
3327 regs_buff[28] = er32(TDFH);
3328 regs_buff[29] = er32(TDFT);
3329 regs_buff[30] = er32(TDFHS);
3330 regs_buff[31] = er32(TDFTS);
3331 regs_buff[32] = er32(TDFPC);
3332 regs_buff[33] = er32(RDFH);
3333 regs_buff[34] = er32(RDFT);
3334 regs_buff[35] = er32(RDFHS);
3335 regs_buff[36] = er32(RDFTS);
3336 regs_buff[37] = er32(RDFPC);
3338 pr_info("Register dump\n");
3339 for (i = 0; i < NUM_REGS; i++)
3340 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3344 * e1000_dump: Print registers, tx ring and rx ring
3346 static void e1000_dump(struct e1000_adapter *adapter)
3348 /* this code doesn't handle multiple rings */
3349 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3350 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3353 if (!netif_msg_hw(adapter))
3356 /* Print Registers */
3357 e1000_regdump(adapter);
3360 pr_info("TX Desc ring0 dump\n");
3362 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3364 * Legacy Transmit Descriptor
3365 * +--------------------------------------------------------------+
3366 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3367 * +--------------------------------------------------------------+
3368 * 8 | Special | CSS | Status | CMD | CSO | Length |
3369 * +--------------------------------------------------------------+
3370 * 63 48 47 36 35 32 31 24 23 16 15 0
3372 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3373 * 63 48 47 40 39 32 31 16 15 8 7 0
3374 * +----------------------------------------------------------------+
3375 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3376 * +----------------------------------------------------------------+
3377 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3378 * +----------------------------------------------------------------+
3379 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3381 * Extended Data Descriptor (DTYP=0x1)
3382 * +----------------------------------------------------------------+
3383 * 0 | Buffer Address [63:0] |
3384 * +----------------------------------------------------------------+
3385 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3386 * +----------------------------------------------------------------+
3387 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3389 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3390 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3392 if (!netif_msg_tx_done(adapter))
3393 goto rx_ring_summary;
3395 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3396 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3397 struct e1000_tx_buffer *buffer_info = &tx_ring->buffer_info[i];
3398 struct my_u { __le64 a; __le64 b; };
3399 struct my_u *u = (struct my_u *)tx_desc;
3402 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3404 else if (i == tx_ring->next_to_use)
3406 else if (i == tx_ring->next_to_clean)
3411 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3412 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3413 le64_to_cpu(u->a), le64_to_cpu(u->b),
3414 (u64)buffer_info->dma, buffer_info->length,
3415 buffer_info->next_to_watch,
3416 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3421 pr_info("\nRX Desc ring dump\n");
3423 /* Legacy Receive Descriptor Format
3425 * +-----------------------------------------------------+
3426 * | Buffer Address [63:0] |
3427 * +-----------------------------------------------------+
3428 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3429 * +-----------------------------------------------------+
3430 * 63 48 47 40 39 32 31 16 15 0
3432 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3434 if (!netif_msg_rx_status(adapter))
3437 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3438 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3439 struct e1000_rx_buffer *buffer_info = &rx_ring->buffer_info[i];
3440 struct my_u { __le64 a; __le64 b; };
3441 struct my_u *u = (struct my_u *)rx_desc;
3444 if (i == rx_ring->next_to_use)
3446 else if (i == rx_ring->next_to_clean)
3451 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3452 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3453 (u64)buffer_info->dma, buffer_info->rxbuf.data, type);
3456 /* dump the descriptor caches */
3458 pr_info("Rx descriptor cache in 64bit format\n");
3459 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3460 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3462 readl(adapter->hw.hw_addr + i+4),
3463 readl(adapter->hw.hw_addr + i),
3464 readl(adapter->hw.hw_addr + i+12),
3465 readl(adapter->hw.hw_addr + i+8));
3468 pr_info("Tx descriptor cache in 64bit format\n");
3469 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3470 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3472 readl(adapter->hw.hw_addr + i+4),
3473 readl(adapter->hw.hw_addr + i),
3474 readl(adapter->hw.hw_addr + i+12),
3475 readl(adapter->hw.hw_addr + i+8));
3482 * e1000_tx_timeout - Respond to a Tx Hang
3483 * @netdev: network interface device structure
3485 static void e1000_tx_timeout(struct net_device *netdev)
3487 struct e1000_adapter *adapter = netdev_priv(netdev);
3489 /* Do the reset outside of interrupt context */
3490 adapter->tx_timeout_count++;
3491 schedule_work(&adapter->reset_task);
3494 static void e1000_reset_task(struct work_struct *work)
3496 struct e1000_adapter *adapter =
3497 container_of(work, struct e1000_adapter, reset_task);
3499 e_err(drv, "Reset adapter\n");
3500 e1000_reinit_locked(adapter);
3504 * e1000_get_stats - Get System Network Statistics
3505 * @netdev: network interface device structure
3507 * Returns the address of the device statistics structure.
3508 * The statistics are actually updated from the watchdog.
3510 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3512 /* only return the current stats */
3513 return &netdev->stats;
3517 * e1000_change_mtu - Change the Maximum Transfer Unit
3518 * @netdev: network interface device structure
3519 * @new_mtu: new value for maximum frame size
3521 * Returns 0 on success, negative on failure
3523 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3525 struct e1000_adapter *adapter = netdev_priv(netdev);
3526 struct e1000_hw *hw = &adapter->hw;
3527 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3529 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3530 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3531 e_err(probe, "Invalid MTU setting\n");
3535 /* Adapter-specific max frame size limits. */
3536 switch (hw->mac_type) {
3537 case e1000_undefined ... e1000_82542_rev2_1:
3538 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3539 e_err(probe, "Jumbo Frames not supported.\n");
3544 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3548 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3550 /* e1000_down has a dependency on max_frame_size */
3551 hw->max_frame_size = max_frame;
3552 if (netif_running(netdev))
3553 e1000_down(adapter);
3555 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3556 * means we reserve 2 more, this pushes us to allocate from the next
3558 * i.e. RXBUFFER_2048 --> size-4096 slab
3559 * however with the new *_jumbo_rx* routines, jumbo receives will use
3563 if (max_frame <= E1000_RXBUFFER_2048)
3564 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3566 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3567 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3568 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3569 adapter->rx_buffer_len = PAGE_SIZE;
3572 /* adjust allocation if LPE protects us, and we aren't using SBP */
3573 if (!hw->tbi_compatibility_on &&
3574 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3575 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3576 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3578 pr_info("%s changing MTU from %d to %d\n",
3579 netdev->name, netdev->mtu, new_mtu);
3580 netdev->mtu = new_mtu;
3582 if (netif_running(netdev))
3585 e1000_reset(adapter);
3587 clear_bit(__E1000_RESETTING, &adapter->flags);
3593 * e1000_update_stats - Update the board statistics counters
3594 * @adapter: board private structure
3596 void e1000_update_stats(struct e1000_adapter *adapter)
3598 struct net_device *netdev = adapter->netdev;
3599 struct e1000_hw *hw = &adapter->hw;
3600 struct pci_dev *pdev = adapter->pdev;
3601 unsigned long flags;
3604 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3606 /* Prevent stats update while adapter is being reset, or if the pci
3607 * connection is down.
3609 if (adapter->link_speed == 0)
3611 if (pci_channel_offline(pdev))
3614 spin_lock_irqsave(&adapter->stats_lock, flags);
3616 /* these counters are modified from e1000_tbi_adjust_stats,
3617 * called from the interrupt context, so they must only
3618 * be written while holding adapter->stats_lock
3621 adapter->stats.crcerrs += er32(CRCERRS);
3622 adapter->stats.gprc += er32(GPRC);
3623 adapter->stats.gorcl += er32(GORCL);
3624 adapter->stats.gorch += er32(GORCH);
3625 adapter->stats.bprc += er32(BPRC);
3626 adapter->stats.mprc += er32(MPRC);
3627 adapter->stats.roc += er32(ROC);
3629 adapter->stats.prc64 += er32(PRC64);
3630 adapter->stats.prc127 += er32(PRC127);
3631 adapter->stats.prc255 += er32(PRC255);
3632 adapter->stats.prc511 += er32(PRC511);
3633 adapter->stats.prc1023 += er32(PRC1023);
3634 adapter->stats.prc1522 += er32(PRC1522);
3636 adapter->stats.symerrs += er32(SYMERRS);
3637 adapter->stats.mpc += er32(MPC);
3638 adapter->stats.scc += er32(SCC);
3639 adapter->stats.ecol += er32(ECOL);
3640 adapter->stats.mcc += er32(MCC);
3641 adapter->stats.latecol += er32(LATECOL);
3642 adapter->stats.dc += er32(DC);
3643 adapter->stats.sec += er32(SEC);
3644 adapter->stats.rlec += er32(RLEC);
3645 adapter->stats.xonrxc += er32(XONRXC);
3646 adapter->stats.xontxc += er32(XONTXC);
3647 adapter->stats.xoffrxc += er32(XOFFRXC);
3648 adapter->stats.xofftxc += er32(XOFFTXC);
3649 adapter->stats.fcruc += er32(FCRUC);
3650 adapter->stats.gptc += er32(GPTC);
3651 adapter->stats.gotcl += er32(GOTCL);
3652 adapter->stats.gotch += er32(GOTCH);
3653 adapter->stats.rnbc += er32(RNBC);
3654 adapter->stats.ruc += er32(RUC);
3655 adapter->stats.rfc += er32(RFC);
3656 adapter->stats.rjc += er32(RJC);
3657 adapter->stats.torl += er32(TORL);
3658 adapter->stats.torh += er32(TORH);
3659 adapter->stats.totl += er32(TOTL);
3660 adapter->stats.toth += er32(TOTH);
3661 adapter->stats.tpr += er32(TPR);
3663 adapter->stats.ptc64 += er32(PTC64);
3664 adapter->stats.ptc127 += er32(PTC127);
3665 adapter->stats.ptc255 += er32(PTC255);
3666 adapter->stats.ptc511 += er32(PTC511);
3667 adapter->stats.ptc1023 += er32(PTC1023);
3668 adapter->stats.ptc1522 += er32(PTC1522);
3670 adapter->stats.mptc += er32(MPTC);
3671 adapter->stats.bptc += er32(BPTC);
3673 /* used for adaptive IFS */
3675 hw->tx_packet_delta = er32(TPT);
3676 adapter->stats.tpt += hw->tx_packet_delta;
3677 hw->collision_delta = er32(COLC);
3678 adapter->stats.colc += hw->collision_delta;
3680 if (hw->mac_type >= e1000_82543) {
3681 adapter->stats.algnerrc += er32(ALGNERRC);
3682 adapter->stats.rxerrc += er32(RXERRC);
3683 adapter->stats.tncrs += er32(TNCRS);
3684 adapter->stats.cexterr += er32(CEXTERR);
3685 adapter->stats.tsctc += er32(TSCTC);
3686 adapter->stats.tsctfc += er32(TSCTFC);
3689 /* Fill out the OS statistics structure */
3690 netdev->stats.multicast = adapter->stats.mprc;
3691 netdev->stats.collisions = adapter->stats.colc;
3695 /* RLEC on some newer hardware can be incorrect so build
3696 * our own version based on RUC and ROC
3698 netdev->stats.rx_errors = adapter->stats.rxerrc +
3699 adapter->stats.crcerrs + adapter->stats.algnerrc +
3700 adapter->stats.ruc + adapter->stats.roc +
3701 adapter->stats.cexterr;
3702 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3703 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3704 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3705 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3706 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3709 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3710 netdev->stats.tx_errors = adapter->stats.txerrc;
3711 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3712 netdev->stats.tx_window_errors = adapter->stats.latecol;
3713 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3714 if (hw->bad_tx_carr_stats_fd &&
3715 adapter->link_duplex == FULL_DUPLEX) {
3716 netdev->stats.tx_carrier_errors = 0;
3717 adapter->stats.tncrs = 0;
3720 /* Tx Dropped needs to be maintained elsewhere */
3723 if (hw->media_type == e1000_media_type_copper) {
3724 if ((adapter->link_speed == SPEED_1000) &&
3725 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3726 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3727 adapter->phy_stats.idle_errors += phy_tmp;
3730 if ((hw->mac_type <= e1000_82546) &&
3731 (hw->phy_type == e1000_phy_m88) &&
3732 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3733 adapter->phy_stats.receive_errors += phy_tmp;
3736 /* Management Stats */
3737 if (hw->has_smbus) {
3738 adapter->stats.mgptc += er32(MGTPTC);
3739 adapter->stats.mgprc += er32(MGTPRC);
3740 adapter->stats.mgpdc += er32(MGTPDC);
3743 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3747 * e1000_intr - Interrupt Handler
3748 * @irq: interrupt number
3749 * @data: pointer to a network interface device structure
3751 static irqreturn_t e1000_intr(int irq, void *data)
3753 struct net_device *netdev = data;
3754 struct e1000_adapter *adapter = netdev_priv(netdev);
3755 struct e1000_hw *hw = &adapter->hw;
3756 u32 icr = er32(ICR);
3758 if (unlikely((!icr)))
3759 return IRQ_NONE; /* Not our interrupt */
3761 /* we might have caused the interrupt, but the above
3762 * read cleared it, and just in case the driver is
3763 * down there is nothing to do so return handled
3765 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3768 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3769 hw->get_link_status = 1;
3770 /* guard against interrupt when we're going down */
3771 if (!test_bit(__E1000_DOWN, &adapter->flags))
3772 schedule_delayed_work(&adapter->watchdog_task, 1);
3775 /* disable interrupts, without the synchronize_irq bit */
3777 E1000_WRITE_FLUSH();
3779 if (likely(napi_schedule_prep(&adapter->napi))) {
3780 adapter->total_tx_bytes = 0;
3781 adapter->total_tx_packets = 0;
3782 adapter->total_rx_bytes = 0;
3783 adapter->total_rx_packets = 0;
3784 __napi_schedule(&adapter->napi);
3786 /* this really should not happen! if it does it is basically a
3787 * bug, but not a hard error, so enable ints and continue
3789 if (!test_bit(__E1000_DOWN, &adapter->flags))
3790 e1000_irq_enable(adapter);
3797 * e1000_clean - NAPI Rx polling callback
3798 * @adapter: board private structure
3800 static int e1000_clean(struct napi_struct *napi, int budget)
3802 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
3804 int tx_clean_complete = 0, work_done = 0;
3806 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3808 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3810 if (!tx_clean_complete)
3813 /* If budget not fully consumed, exit the polling mode */
3814 if (work_done < budget) {
3815 if (likely(adapter->itr_setting & 3))
3816 e1000_set_itr(adapter);
3817 napi_complete(napi);
3818 if (!test_bit(__E1000_DOWN, &adapter->flags))
3819 e1000_irq_enable(adapter);
3826 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3827 * @adapter: board private structure
3829 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3830 struct e1000_tx_ring *tx_ring)
3832 struct e1000_hw *hw = &adapter->hw;
3833 struct net_device *netdev = adapter->netdev;
3834 struct e1000_tx_desc *tx_desc, *eop_desc;
3835 struct e1000_tx_buffer *buffer_info;
3836 unsigned int i, eop;
3837 unsigned int count = 0;
3838 unsigned int total_tx_bytes=0, total_tx_packets=0;
3839 unsigned int bytes_compl = 0, pkts_compl = 0;
3841 i = tx_ring->next_to_clean;
3842 eop = tx_ring->buffer_info[i].next_to_watch;
3843 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3845 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3846 (count < tx_ring->count)) {
3847 bool cleaned = false;
3848 rmb(); /* read buffer_info after eop_desc */
3849 for ( ; !cleaned; count++) {
3850 tx_desc = E1000_TX_DESC(*tx_ring, i);
3851 buffer_info = &tx_ring->buffer_info[i];
3852 cleaned = (i == eop);
3855 total_tx_packets += buffer_info->segs;
3856 total_tx_bytes += buffer_info->bytecount;
3857 if (buffer_info->skb) {
3858 bytes_compl += buffer_info->skb->len;
3863 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3864 tx_desc->upper.data = 0;
3866 if (unlikely(++i == tx_ring->count)) i = 0;
3869 eop = tx_ring->buffer_info[i].next_to_watch;
3870 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3873 tx_ring->next_to_clean = i;
3875 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
3877 #define TX_WAKE_THRESHOLD 32
3878 if (unlikely(count && netif_carrier_ok(netdev) &&
3879 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3880 /* Make sure that anybody stopping the queue after this
3881 * sees the new next_to_clean.
3885 if (netif_queue_stopped(netdev) &&
3886 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3887 netif_wake_queue(netdev);
3888 ++adapter->restart_queue;
3892 if (adapter->detect_tx_hung) {
3893 /* Detect a transmit hang in hardware, this serializes the
3894 * check with the clearing of time_stamp and movement of i
3896 adapter->detect_tx_hung = false;
3897 if (tx_ring->buffer_info[eop].time_stamp &&
3898 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3899 (adapter->tx_timeout_factor * HZ)) &&
3900 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3902 /* detected Tx unit hang */
3903 e_err(drv, "Detected Tx Unit Hang\n"
3907 " next_to_use <%x>\n"
3908 " next_to_clean <%x>\n"
3909 "buffer_info[next_to_clean]\n"
3910 " time_stamp <%lx>\n"
3911 " next_to_watch <%x>\n"
3913 " next_to_watch.status <%x>\n",
3914 (unsigned long)(tx_ring - adapter->tx_ring),
3915 readl(hw->hw_addr + tx_ring->tdh),
3916 readl(hw->hw_addr + tx_ring->tdt),
3917 tx_ring->next_to_use,
3918 tx_ring->next_to_clean,
3919 tx_ring->buffer_info[eop].time_stamp,
3922 eop_desc->upper.fields.status);
3923 e1000_dump(adapter);
3924 netif_stop_queue(netdev);
3927 adapter->total_tx_bytes += total_tx_bytes;
3928 adapter->total_tx_packets += total_tx_packets;
3929 netdev->stats.tx_bytes += total_tx_bytes;
3930 netdev->stats.tx_packets += total_tx_packets;
3931 return count < tx_ring->count;
3935 * e1000_rx_checksum - Receive Checksum Offload for 82543
3936 * @adapter: board private structure
3937 * @status_err: receive descriptor status and error fields
3938 * @csum: receive descriptor csum field
3939 * @sk_buff: socket buffer with received data
3941 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3942 u32 csum, struct sk_buff *skb)
3944 struct e1000_hw *hw = &adapter->hw;
3945 u16 status = (u16)status_err;
3946 u8 errors = (u8)(status_err >> 24);
3948 skb_checksum_none_assert(skb);
3950 /* 82543 or newer only */
3951 if (unlikely(hw->mac_type < e1000_82543)) return;
3952 /* Ignore Checksum bit is set */
3953 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3954 /* TCP/UDP checksum error bit is set */
3955 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3956 /* let the stack verify checksum errors */
3957 adapter->hw_csum_err++;
3960 /* TCP/UDP Checksum has not been calculated */
3961 if (!(status & E1000_RXD_STAT_TCPCS))
3964 /* It must be a TCP or UDP packet with a valid checksum */
3965 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3966 /* TCP checksum is good */
3967 skb->ip_summed = CHECKSUM_UNNECESSARY;
3969 adapter->hw_csum_good++;
3973 * e1000_consume_page - helper function for jumbo Rx path
3975 static void e1000_consume_page(struct e1000_rx_buffer *bi, struct sk_buff *skb,
3978 bi->rxbuf.page = NULL;
3980 skb->data_len += length;
3981 skb->truesize += PAGE_SIZE;
3985 * e1000_receive_skb - helper function to handle rx indications
3986 * @adapter: board private structure
3987 * @status: descriptor status field as written by hardware
3988 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3989 * @skb: pointer to sk_buff to be indicated to stack
3991 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3992 __le16 vlan, struct sk_buff *skb)
3994 skb->protocol = eth_type_trans(skb, adapter->netdev);
3996 if (status & E1000_RXD_STAT_VP) {
3997 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
3999 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4001 napi_gro_receive(&adapter->napi, skb);
4005 * e1000_tbi_adjust_stats
4006 * @hw: Struct containing variables accessed by shared code
4007 * @frame_len: The length of the frame in question
4008 * @mac_addr: The Ethernet destination address of the frame in question
4010 * Adjusts the statistic counters when a frame is accepted by TBI_ACCEPT
4012 static void e1000_tbi_adjust_stats(struct e1000_hw *hw,
4013 struct e1000_hw_stats *stats,
4014 u32 frame_len, const u8 *mac_addr)
4018 /* First adjust the frame length. */
4020 /* We need to adjust the statistics counters, since the hardware
4021 * counters overcount this packet as a CRC error and undercount
4022 * the packet as a good packet
4024 /* This packet should not be counted as a CRC error. */
4026 /* This packet does count as a Good Packet Received. */
4029 /* Adjust the Good Octets received counters */
4030 carry_bit = 0x80000000 & stats->gorcl;
4031 stats->gorcl += frame_len;
4032 /* If the high bit of Gorcl (the low 32 bits of the Good Octets
4033 * Received Count) was one before the addition,
4034 * AND it is zero after, then we lost the carry out,
4035 * need to add one to Gorch (Good Octets Received Count High).
4036 * This could be simplified if all environments supported
4039 if (carry_bit && ((stats->gorcl & 0x80000000) == 0))
4041 /* Is this a broadcast or multicast? Check broadcast first,
4042 * since the test for a multicast frame will test positive on
4043 * a broadcast frame.
4045 if (is_broadcast_ether_addr(mac_addr))
4047 else if (is_multicast_ether_addr(mac_addr))
4050 if (frame_len == hw->max_frame_size) {
4051 /* In this case, the hardware has overcounted the number of
4058 /* Adjust the bin counters when the extra byte put the frame in the
4059 * wrong bin. Remember that the frame_len was adjusted above.
4061 if (frame_len == 64) {
4064 } else if (frame_len == 127) {
4067 } else if (frame_len == 255) {
4070 } else if (frame_len == 511) {
4073 } else if (frame_len == 1023) {
4076 } else if (frame_len == 1522) {
4081 static bool e1000_tbi_should_accept(struct e1000_adapter *adapter,
4082 u8 status, u8 errors,
4083 u32 length, const u8 *data)
4085 struct e1000_hw *hw = &adapter->hw;
4086 u8 last_byte = *(data + length - 1);
4088 if (TBI_ACCEPT(hw, status, errors, length, last_byte)) {
4089 unsigned long irq_flags;
4091 spin_lock_irqsave(&adapter->stats_lock, irq_flags);
4092 e1000_tbi_adjust_stats(hw, &adapter->stats, length, data);
4093 spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
4101 static struct sk_buff *e1000_alloc_rx_skb(struct e1000_adapter *adapter,
4104 struct sk_buff *skb = netdev_alloc_skb_ip_align(adapter->netdev, bufsz);
4107 adapter->alloc_rx_buff_failed++;
4112 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4113 * @adapter: board private structure
4114 * @rx_ring: ring to clean
4115 * @work_done: amount of napi work completed this call
4116 * @work_to_do: max amount of work allowed for this call to do
4118 * the return value indicates whether actual cleaning was done, there
4119 * is no guarantee that everything was cleaned
4121 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
4122 struct e1000_rx_ring *rx_ring,
4123 int *work_done, int work_to_do)
4125 struct net_device *netdev = adapter->netdev;
4126 struct pci_dev *pdev = adapter->pdev;
4127 struct e1000_rx_desc *rx_desc, *next_rxd;
4128 struct e1000_rx_buffer *buffer_info, *next_buffer;
4131 int cleaned_count = 0;
4132 bool cleaned = false;
4133 unsigned int total_rx_bytes=0, total_rx_packets=0;
4135 i = rx_ring->next_to_clean;
4136 rx_desc = E1000_RX_DESC(*rx_ring, i);
4137 buffer_info = &rx_ring->buffer_info[i];
4139 while (rx_desc->status & E1000_RXD_STAT_DD) {
4140 struct sk_buff *skb;
4143 if (*work_done >= work_to_do)
4146 rmb(); /* read descriptor and rx_buffer_info after status DD */
4148 status = rx_desc->status;
4150 if (++i == rx_ring->count) i = 0;
4151 next_rxd = E1000_RX_DESC(*rx_ring, i);
4154 next_buffer = &rx_ring->buffer_info[i];
4158 dma_unmap_page(&pdev->dev, buffer_info->dma,
4159 adapter->rx_buffer_len, DMA_FROM_DEVICE);
4160 buffer_info->dma = 0;
4162 length = le16_to_cpu(rx_desc->length);
4164 /* errors is only valid for DD + EOP descriptors */
4165 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4166 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4167 u8 *mapped = page_address(buffer_info->rxbuf.page);
4169 if (e1000_tbi_should_accept(adapter, status,
4173 } else if (netdev->features & NETIF_F_RXALL) {
4176 /* an error means any chain goes out the window
4179 if (rx_ring->rx_skb_top)
4180 dev_kfree_skb(rx_ring->rx_skb_top);
4181 rx_ring->rx_skb_top = NULL;
4186 #define rxtop rx_ring->rx_skb_top
4188 if (!(status & E1000_RXD_STAT_EOP)) {
4189 /* this descriptor is only the beginning (or middle) */
4191 /* this is the beginning of a chain */
4192 rxtop = napi_get_frags(&adapter->napi);
4196 skb_fill_page_desc(rxtop, 0,
4197 buffer_info->rxbuf.page,
4200 /* this is the middle of a chain */
4201 skb_fill_page_desc(rxtop,
4202 skb_shinfo(rxtop)->nr_frags,
4203 buffer_info->rxbuf.page, 0, length);
4205 e1000_consume_page(buffer_info, rxtop, length);
4209 /* end of the chain */
4210 skb_fill_page_desc(rxtop,
4211 skb_shinfo(rxtop)->nr_frags,
4212 buffer_info->rxbuf.page, 0, length);
4215 e1000_consume_page(buffer_info, skb, length);
4218 /* no chain, got EOP, this buf is the packet
4219 * copybreak to save the put_page/alloc_page
4221 p = buffer_info->rxbuf.page;
4222 if (length <= copybreak) {
4225 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4227 skb = e1000_alloc_rx_skb(adapter,
4232 vaddr = kmap_atomic(p);
4233 memcpy(skb_tail_pointer(skb), vaddr,
4235 kunmap_atomic(vaddr);
4236 /* re-use the page, so don't erase
4237 * buffer_info->rxbuf.page
4239 skb_put(skb, length);
4240 e1000_rx_checksum(adapter,
4241 status | rx_desc->errors << 24,
4242 le16_to_cpu(rx_desc->csum), skb);
4244 total_rx_bytes += skb->len;
4247 e1000_receive_skb(adapter, status,
4248 rx_desc->special, skb);
4251 skb = napi_get_frags(&adapter->napi);
4253 adapter->alloc_rx_buff_failed++;
4256 skb_fill_page_desc(skb, 0, p, 0,
4258 e1000_consume_page(buffer_info, skb,
4264 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4265 e1000_rx_checksum(adapter,
4267 ((u32)(rx_desc->errors) << 24),
4268 le16_to_cpu(rx_desc->csum), skb);
4270 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4271 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4272 pskb_trim(skb, skb->len - 4);
4275 if (status & E1000_RXD_STAT_VP) {
4276 __le16 vlan = rx_desc->special;
4277 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4279 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4282 napi_gro_frags(&adapter->napi);
4285 rx_desc->status = 0;
4287 /* return some buffers to hardware, one at a time is too slow */
4288 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4289 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4293 /* use prefetched values */
4295 buffer_info = next_buffer;
4297 rx_ring->next_to_clean = i;
4299 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4301 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4303 adapter->total_rx_packets += total_rx_packets;
4304 adapter->total_rx_bytes += total_rx_bytes;
4305 netdev->stats.rx_bytes += total_rx_bytes;
4306 netdev->stats.rx_packets += total_rx_packets;
4310 /* this should improve performance for small packets with large amounts
4311 * of reassembly being done in the stack
4313 static struct sk_buff *e1000_copybreak(struct e1000_adapter *adapter,
4314 struct e1000_rx_buffer *buffer_info,
4315 u32 length, const void *data)
4317 struct sk_buff *skb;
4319 if (length > copybreak)
4322 skb = e1000_alloc_rx_skb(adapter, length);
4326 dma_sync_single_for_cpu(&adapter->pdev->dev, buffer_info->dma,
4327 length, DMA_FROM_DEVICE);
4329 memcpy(skb_put(skb, length), data, length);
4335 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4336 * @adapter: board private structure
4337 * @rx_ring: ring to clean
4338 * @work_done: amount of napi work completed this call
4339 * @work_to_do: max amount of work allowed for this call to do
4341 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4342 struct e1000_rx_ring *rx_ring,
4343 int *work_done, int work_to_do)
4345 struct net_device *netdev = adapter->netdev;
4346 struct pci_dev *pdev = adapter->pdev;
4347 struct e1000_rx_desc *rx_desc, *next_rxd;
4348 struct e1000_rx_buffer *buffer_info, *next_buffer;
4351 int cleaned_count = 0;
4352 bool cleaned = false;
4353 unsigned int total_rx_bytes=0, total_rx_packets=0;
4355 i = rx_ring->next_to_clean;
4356 rx_desc = E1000_RX_DESC(*rx_ring, i);
4357 buffer_info = &rx_ring->buffer_info[i];
4359 while (rx_desc->status & E1000_RXD_STAT_DD) {
4360 struct sk_buff *skb;
4364 if (*work_done >= work_to_do)
4367 rmb(); /* read descriptor and rx_buffer_info after status DD */
4369 status = rx_desc->status;
4370 length = le16_to_cpu(rx_desc->length);
4372 data = buffer_info->rxbuf.data;
4374 skb = e1000_copybreak(adapter, buffer_info, length, data);
4376 unsigned int frag_len = e1000_frag_len(adapter);
4378 skb = build_skb(data - E1000_HEADROOM, frag_len);
4380 adapter->alloc_rx_buff_failed++;
4384 skb_reserve(skb, E1000_HEADROOM);
4385 dma_unmap_single(&pdev->dev, buffer_info->dma,
4386 adapter->rx_buffer_len,
4388 buffer_info->dma = 0;
4389 buffer_info->rxbuf.data = NULL;
4392 if (++i == rx_ring->count) i = 0;
4393 next_rxd = E1000_RX_DESC(*rx_ring, i);
4396 next_buffer = &rx_ring->buffer_info[i];
4401 /* !EOP means multiple descriptors were used to store a single
4402 * packet, if thats the case we need to toss it. In fact, we
4403 * to toss every packet with the EOP bit clear and the next
4404 * frame that _does_ have the EOP bit set, as it is by
4405 * definition only a frame fragment
4407 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4408 adapter->discarding = true;
4410 if (adapter->discarding) {
4411 /* All receives must fit into a single buffer */
4412 netdev_dbg(netdev, "Receive packet consumed multiple buffers\n");
4414 if (status & E1000_RXD_STAT_EOP)
4415 adapter->discarding = false;
4419 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4420 if (e1000_tbi_should_accept(adapter, status,
4424 } else if (netdev->features & NETIF_F_RXALL) {
4433 total_rx_bytes += (length - 4); /* don't count FCS */
4436 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4437 /* adjust length to remove Ethernet CRC, this must be
4438 * done after the TBI_ACCEPT workaround above
4442 if (buffer_info->rxbuf.data == NULL)
4443 skb_put(skb, length);
4444 else /* copybreak skb */
4445 skb_trim(skb, length);
4447 /* Receive Checksum Offload */
4448 e1000_rx_checksum(adapter,
4450 ((u32)(rx_desc->errors) << 24),
4451 le16_to_cpu(rx_desc->csum), skb);
4453 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4456 rx_desc->status = 0;
4458 /* return some buffers to hardware, one at a time is too slow */
4459 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4460 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4464 /* use prefetched values */
4466 buffer_info = next_buffer;
4468 rx_ring->next_to_clean = i;
4470 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4472 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4474 adapter->total_rx_packets += total_rx_packets;
4475 adapter->total_rx_bytes += total_rx_bytes;
4476 netdev->stats.rx_bytes += total_rx_bytes;
4477 netdev->stats.rx_packets += total_rx_packets;
4482 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4483 * @adapter: address of board private structure
4484 * @rx_ring: pointer to receive ring structure
4485 * @cleaned_count: number of buffers to allocate this pass
4488 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4489 struct e1000_rx_ring *rx_ring, int cleaned_count)
4491 struct pci_dev *pdev = adapter->pdev;
4492 struct e1000_rx_desc *rx_desc;
4493 struct e1000_rx_buffer *buffer_info;
4496 i = rx_ring->next_to_use;
4497 buffer_info = &rx_ring->buffer_info[i];
4499 while (cleaned_count--) {
4500 /* allocate a new page if necessary */
4501 if (!buffer_info->rxbuf.page) {
4502 buffer_info->rxbuf.page = alloc_page(GFP_ATOMIC);
4503 if (unlikely(!buffer_info->rxbuf.page)) {
4504 adapter->alloc_rx_buff_failed++;
4509 if (!buffer_info->dma) {
4510 buffer_info->dma = dma_map_page(&pdev->dev,
4511 buffer_info->rxbuf.page, 0,
4512 adapter->rx_buffer_len,
4514 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4515 put_page(buffer_info->rxbuf.page);
4516 buffer_info->rxbuf.page = NULL;
4517 buffer_info->dma = 0;
4518 adapter->alloc_rx_buff_failed++;
4523 rx_desc = E1000_RX_DESC(*rx_ring, i);
4524 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4526 if (unlikely(++i == rx_ring->count))
4528 buffer_info = &rx_ring->buffer_info[i];
4531 if (likely(rx_ring->next_to_use != i)) {
4532 rx_ring->next_to_use = i;
4533 if (unlikely(i-- == 0))
4534 i = (rx_ring->count - 1);
4536 /* Force memory writes to complete before letting h/w
4537 * know there are new descriptors to fetch. (Only
4538 * applicable for weak-ordered memory model archs,
4542 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4547 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4548 * @adapter: address of board private structure
4550 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4551 struct e1000_rx_ring *rx_ring,
4554 struct e1000_hw *hw = &adapter->hw;
4555 struct pci_dev *pdev = adapter->pdev;
4556 struct e1000_rx_desc *rx_desc;
4557 struct e1000_rx_buffer *buffer_info;
4559 unsigned int bufsz = adapter->rx_buffer_len;
4561 i = rx_ring->next_to_use;
4562 buffer_info = &rx_ring->buffer_info[i];
4564 while (cleaned_count--) {
4567 if (buffer_info->rxbuf.data)
4570 data = e1000_alloc_frag(adapter);
4572 /* Better luck next round */
4573 adapter->alloc_rx_buff_failed++;
4577 /* Fix for errata 23, can't cross 64kB boundary */
4578 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4579 void *olddata = data;
4580 e_err(rx_err, "skb align check failed: %u bytes at "
4581 "%p\n", bufsz, data);
4582 /* Try again, without freeing the previous */
4583 data = e1000_alloc_frag(adapter);
4584 /* Failed allocation, critical failure */
4586 e1000_free_frag(olddata);
4587 adapter->alloc_rx_buff_failed++;
4591 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4593 e1000_free_frag(data);
4594 e1000_free_frag(olddata);
4595 adapter->alloc_rx_buff_failed++;
4599 /* Use new allocation */
4600 e1000_free_frag(olddata);
4602 buffer_info->dma = dma_map_single(&pdev->dev,
4604 adapter->rx_buffer_len,
4606 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4607 e1000_free_frag(data);
4608 buffer_info->dma = 0;
4609 adapter->alloc_rx_buff_failed++;
4613 /* XXX if it was allocated cleanly it will never map to a
4617 /* Fix for errata 23, can't cross 64kB boundary */
4618 if (!e1000_check_64k_bound(adapter,
4619 (void *)(unsigned long)buffer_info->dma,
4620 adapter->rx_buffer_len)) {
4621 e_err(rx_err, "dma align check failed: %u bytes at "
4622 "%p\n", adapter->rx_buffer_len,
4623 (void *)(unsigned long)buffer_info->dma);
4625 dma_unmap_single(&pdev->dev, buffer_info->dma,
4626 adapter->rx_buffer_len,
4629 e1000_free_frag(data);
4630 buffer_info->rxbuf.data = NULL;
4631 buffer_info->dma = 0;
4633 adapter->alloc_rx_buff_failed++;
4636 buffer_info->rxbuf.data = data;
4638 rx_desc = E1000_RX_DESC(*rx_ring, i);
4639 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4641 if (unlikely(++i == rx_ring->count))
4643 buffer_info = &rx_ring->buffer_info[i];
4646 if (likely(rx_ring->next_to_use != i)) {
4647 rx_ring->next_to_use = i;
4648 if (unlikely(i-- == 0))
4649 i = (rx_ring->count - 1);
4651 /* Force memory writes to complete before letting h/w
4652 * know there are new descriptors to fetch. (Only
4653 * applicable for weak-ordered memory model archs,
4657 writel(i, hw->hw_addr + rx_ring->rdt);
4662 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4665 static void e1000_smartspeed(struct e1000_adapter *adapter)
4667 struct e1000_hw *hw = &adapter->hw;
4671 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4672 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4675 if (adapter->smartspeed == 0) {
4676 /* If Master/Slave config fault is asserted twice,
4677 * we assume back-to-back
4679 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4680 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4681 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4682 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4683 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4684 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4685 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4686 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4688 adapter->smartspeed++;
4689 if (!e1000_phy_setup_autoneg(hw) &&
4690 !e1000_read_phy_reg(hw, PHY_CTRL,
4692 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4693 MII_CR_RESTART_AUTO_NEG);
4694 e1000_write_phy_reg(hw, PHY_CTRL,
4699 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4700 /* If still no link, perhaps using 2/3 pair cable */
4701 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4702 phy_ctrl |= CR_1000T_MS_ENABLE;
4703 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4704 if (!e1000_phy_setup_autoneg(hw) &&
4705 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4706 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4707 MII_CR_RESTART_AUTO_NEG);
4708 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4711 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4712 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4713 adapter->smartspeed = 0;
4722 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4728 return e1000_mii_ioctl(netdev, ifr, cmd);
4740 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4743 struct e1000_adapter *adapter = netdev_priv(netdev);
4744 struct e1000_hw *hw = &adapter->hw;
4745 struct mii_ioctl_data *data = if_mii(ifr);
4748 unsigned long flags;
4750 if (hw->media_type != e1000_media_type_copper)
4755 data->phy_id = hw->phy_addr;
4758 spin_lock_irqsave(&adapter->stats_lock, flags);
4759 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4761 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4764 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4767 if (data->reg_num & ~(0x1F))
4769 mii_reg = data->val_in;
4770 spin_lock_irqsave(&adapter->stats_lock, flags);
4771 if (e1000_write_phy_reg(hw, data->reg_num,
4773 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4776 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4777 if (hw->media_type == e1000_media_type_copper) {
4778 switch (data->reg_num) {
4780 if (mii_reg & MII_CR_POWER_DOWN)
4782 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4784 hw->autoneg_advertised = 0x2F;
4789 else if (mii_reg & 0x2000)
4793 retval = e1000_set_spd_dplx(
4801 if (netif_running(adapter->netdev))
4802 e1000_reinit_locked(adapter);
4804 e1000_reset(adapter);
4806 case M88E1000_PHY_SPEC_CTRL:
4807 case M88E1000_EXT_PHY_SPEC_CTRL:
4808 if (e1000_phy_reset(hw))
4813 switch (data->reg_num) {
4815 if (mii_reg & MII_CR_POWER_DOWN)
4817 if (netif_running(adapter->netdev))
4818 e1000_reinit_locked(adapter);
4820 e1000_reset(adapter);
4828 return E1000_SUCCESS;
4831 void e1000_pci_set_mwi(struct e1000_hw *hw)
4833 struct e1000_adapter *adapter = hw->back;
4834 int ret_val = pci_set_mwi(adapter->pdev);
4837 e_err(probe, "Error in setting MWI\n");
4840 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4842 struct e1000_adapter *adapter = hw->back;
4844 pci_clear_mwi(adapter->pdev);
4847 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4849 struct e1000_adapter *adapter = hw->back;
4850 return pcix_get_mmrbc(adapter->pdev);
4853 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4855 struct e1000_adapter *adapter = hw->back;
4856 pcix_set_mmrbc(adapter->pdev, mmrbc);
4859 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4864 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4868 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4873 static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4874 netdev_features_t features)
4876 struct e1000_hw *hw = &adapter->hw;
4880 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
4881 /* enable VLAN tag insert/strip */
4882 ctrl |= E1000_CTRL_VME;
4884 /* disable VLAN tag insert/strip */
4885 ctrl &= ~E1000_CTRL_VME;
4889 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4892 struct e1000_hw *hw = &adapter->hw;
4895 if (!test_bit(__E1000_DOWN, &adapter->flags))
4896 e1000_irq_disable(adapter);
4898 __e1000_vlan_mode(adapter, adapter->netdev->features);
4900 /* enable VLAN receive filtering */
4902 rctl &= ~E1000_RCTL_CFIEN;
4903 if (!(adapter->netdev->flags & IFF_PROMISC))
4904 rctl |= E1000_RCTL_VFE;
4906 e1000_update_mng_vlan(adapter);
4908 /* disable VLAN receive filtering */
4910 rctl &= ~E1000_RCTL_VFE;
4914 if (!test_bit(__E1000_DOWN, &adapter->flags))
4915 e1000_irq_enable(adapter);
4918 static void e1000_vlan_mode(struct net_device *netdev,
4919 netdev_features_t features)
4921 struct e1000_adapter *adapter = netdev_priv(netdev);
4923 if (!test_bit(__E1000_DOWN, &adapter->flags))
4924 e1000_irq_disable(adapter);
4926 __e1000_vlan_mode(adapter, features);
4928 if (!test_bit(__E1000_DOWN, &adapter->flags))
4929 e1000_irq_enable(adapter);
4932 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
4933 __be16 proto, u16 vid)
4935 struct e1000_adapter *adapter = netdev_priv(netdev);
4936 struct e1000_hw *hw = &adapter->hw;
4939 if ((hw->mng_cookie.status &
4940 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4941 (vid == adapter->mng_vlan_id))
4944 if (!e1000_vlan_used(adapter))
4945 e1000_vlan_filter_on_off(adapter, true);
4947 /* add VID to filter table */
4948 index = (vid >> 5) & 0x7F;
4949 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4950 vfta |= (1 << (vid & 0x1F));
4951 e1000_write_vfta(hw, index, vfta);
4953 set_bit(vid, adapter->active_vlans);
4958 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
4959 __be16 proto, u16 vid)
4961 struct e1000_adapter *adapter = netdev_priv(netdev);
4962 struct e1000_hw *hw = &adapter->hw;
4965 if (!test_bit(__E1000_DOWN, &adapter->flags))
4966 e1000_irq_disable(adapter);
4967 if (!test_bit(__E1000_DOWN, &adapter->flags))
4968 e1000_irq_enable(adapter);
4970 /* remove VID from filter table */
4971 index = (vid >> 5) & 0x7F;
4972 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4973 vfta &= ~(1 << (vid & 0x1F));
4974 e1000_write_vfta(hw, index, vfta);
4976 clear_bit(vid, adapter->active_vlans);
4978 if (!e1000_vlan_used(adapter))
4979 e1000_vlan_filter_on_off(adapter, false);
4984 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4988 if (!e1000_vlan_used(adapter))
4991 e1000_vlan_filter_on_off(adapter, true);
4992 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4993 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
4996 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4998 struct e1000_hw *hw = &adapter->hw;
5002 /* Make sure dplx is at most 1 bit and lsb of speed is not set
5003 * for the switch() below to work
5005 if ((spd & 1) || (dplx & ~1))
5008 /* Fiber NICs only allow 1000 gbps Full duplex */
5009 if ((hw->media_type == e1000_media_type_fiber) &&
5010 spd != SPEED_1000 &&
5011 dplx != DUPLEX_FULL)
5014 switch (spd + dplx) {
5015 case SPEED_10 + DUPLEX_HALF:
5016 hw->forced_speed_duplex = e1000_10_half;
5018 case SPEED_10 + DUPLEX_FULL:
5019 hw->forced_speed_duplex = e1000_10_full;
5021 case SPEED_100 + DUPLEX_HALF:
5022 hw->forced_speed_duplex = e1000_100_half;
5024 case SPEED_100 + DUPLEX_FULL:
5025 hw->forced_speed_duplex = e1000_100_full;
5027 case SPEED_1000 + DUPLEX_FULL:
5029 hw->autoneg_advertised = ADVERTISE_1000_FULL;
5031 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5036 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
5037 hw->mdix = AUTO_ALL_MODES;
5042 e_err(probe, "Unsupported Speed/Duplex configuration\n");
5046 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
5048 struct net_device *netdev = pci_get_drvdata(pdev);
5049 struct e1000_adapter *adapter = netdev_priv(netdev);
5050 struct e1000_hw *hw = &adapter->hw;
5051 u32 ctrl, ctrl_ext, rctl, status;
5052 u32 wufc = adapter->wol;
5057 netif_device_detach(netdev);
5059 if (netif_running(netdev)) {
5060 int count = E1000_CHECK_RESET_COUNT;
5062 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
5063 usleep_range(10000, 20000);
5065 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5066 e1000_down(adapter);
5070 retval = pci_save_state(pdev);
5075 status = er32(STATUS);
5076 if (status & E1000_STATUS_LU)
5077 wufc &= ~E1000_WUFC_LNKC;
5080 e1000_setup_rctl(adapter);
5081 e1000_set_rx_mode(netdev);
5085 /* turn on all-multi mode if wake on multicast is enabled */
5086 if (wufc & E1000_WUFC_MC)
5087 rctl |= E1000_RCTL_MPE;
5089 /* enable receives in the hardware */
5090 ew32(RCTL, rctl | E1000_RCTL_EN);
5092 if (hw->mac_type >= e1000_82540) {
5094 /* advertise wake from D3Cold */
5095 #define E1000_CTRL_ADVD3WUC 0x00100000
5096 /* phy power management enable */
5097 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5098 ctrl |= E1000_CTRL_ADVD3WUC |
5099 E1000_CTRL_EN_PHY_PWR_MGMT;
5103 if (hw->media_type == e1000_media_type_fiber ||
5104 hw->media_type == e1000_media_type_internal_serdes) {
5105 /* keep the laser running in D3 */
5106 ctrl_ext = er32(CTRL_EXT);
5107 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5108 ew32(CTRL_EXT, ctrl_ext);
5111 ew32(WUC, E1000_WUC_PME_EN);
5118 e1000_release_manageability(adapter);
5120 *enable_wake = !!wufc;
5122 /* make sure adapter isn't asleep if manageability is enabled */
5123 if (adapter->en_mng_pt)
5124 *enable_wake = true;
5126 if (netif_running(netdev))
5127 e1000_free_irq(adapter);
5129 pci_disable_device(pdev);
5135 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5140 retval = __e1000_shutdown(pdev, &wake);
5145 pci_prepare_to_sleep(pdev);
5147 pci_wake_from_d3(pdev, false);
5148 pci_set_power_state(pdev, PCI_D3hot);
5154 static int e1000_resume(struct pci_dev *pdev)
5156 struct net_device *netdev = pci_get_drvdata(pdev);
5157 struct e1000_adapter *adapter = netdev_priv(netdev);
5158 struct e1000_hw *hw = &adapter->hw;
5161 pci_set_power_state(pdev, PCI_D0);
5162 pci_restore_state(pdev);
5163 pci_save_state(pdev);
5165 if (adapter->need_ioport)
5166 err = pci_enable_device(pdev);
5168 err = pci_enable_device_mem(pdev);
5170 pr_err("Cannot enable PCI device from suspend\n");
5173 pci_set_master(pdev);
5175 pci_enable_wake(pdev, PCI_D3hot, 0);
5176 pci_enable_wake(pdev, PCI_D3cold, 0);
5178 if (netif_running(netdev)) {
5179 err = e1000_request_irq(adapter);
5184 e1000_power_up_phy(adapter);
5185 e1000_reset(adapter);
5188 e1000_init_manageability(adapter);
5190 if (netif_running(netdev))
5193 netif_device_attach(netdev);
5199 static void e1000_shutdown(struct pci_dev *pdev)
5203 __e1000_shutdown(pdev, &wake);
5205 if (system_state == SYSTEM_POWER_OFF) {
5206 pci_wake_from_d3(pdev, wake);
5207 pci_set_power_state(pdev, PCI_D3hot);
5211 #ifdef CONFIG_NET_POLL_CONTROLLER
5212 /* Polling 'interrupt' - used by things like netconsole to send skbs
5213 * without having to re-enable interrupts. It's not called while
5214 * the interrupt routine is executing.
5216 static void e1000_netpoll(struct net_device *netdev)
5218 struct e1000_adapter *adapter = netdev_priv(netdev);
5220 disable_irq(adapter->pdev->irq);
5221 e1000_intr(adapter->pdev->irq, netdev);
5222 enable_irq(adapter->pdev->irq);
5227 * e1000_io_error_detected - called when PCI error is detected
5228 * @pdev: Pointer to PCI device
5229 * @state: The current pci connection state
5231 * This function is called after a PCI bus error affecting
5232 * this device has been detected.
5234 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5235 pci_channel_state_t state)
5237 struct net_device *netdev = pci_get_drvdata(pdev);
5238 struct e1000_adapter *adapter = netdev_priv(netdev);
5240 netif_device_detach(netdev);
5242 if (state == pci_channel_io_perm_failure)
5243 return PCI_ERS_RESULT_DISCONNECT;
5245 if (netif_running(netdev))
5246 e1000_down(adapter);
5247 pci_disable_device(pdev);
5249 /* Request a slot slot reset. */
5250 return PCI_ERS_RESULT_NEED_RESET;
5254 * e1000_io_slot_reset - called after the pci bus has been reset.
5255 * @pdev: Pointer to PCI device
5257 * Restart the card from scratch, as if from a cold-boot. Implementation
5258 * resembles the first-half of the e1000_resume routine.
5260 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5262 struct net_device *netdev = pci_get_drvdata(pdev);
5263 struct e1000_adapter *adapter = netdev_priv(netdev);
5264 struct e1000_hw *hw = &adapter->hw;
5267 if (adapter->need_ioport)
5268 err = pci_enable_device(pdev);
5270 err = pci_enable_device_mem(pdev);
5272 pr_err("Cannot re-enable PCI device after reset.\n");
5273 return PCI_ERS_RESULT_DISCONNECT;
5275 pci_set_master(pdev);
5277 pci_enable_wake(pdev, PCI_D3hot, 0);
5278 pci_enable_wake(pdev, PCI_D3cold, 0);
5280 e1000_reset(adapter);
5283 return PCI_ERS_RESULT_RECOVERED;
5287 * e1000_io_resume - called when traffic can start flowing again.
5288 * @pdev: Pointer to PCI device
5290 * This callback is called when the error recovery driver tells us that
5291 * its OK to resume normal operation. Implementation resembles the
5292 * second-half of the e1000_resume routine.
5294 static void e1000_io_resume(struct pci_dev *pdev)
5296 struct net_device *netdev = pci_get_drvdata(pdev);
5297 struct e1000_adapter *adapter = netdev_priv(netdev);
5299 e1000_init_manageability(adapter);
5301 if (netif_running(netdev)) {
5302 if (e1000_up(adapter)) {
5303 pr_info("can't bring device back up after reset\n");
5308 netif_device_attach(netdev);