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 /* Do not set IFF_UNICAST_FLT for VMWare's 82545EM */
1079 if (hw->device_id != E1000_DEV_ID_82545EM_COPPER ||
1080 hw->subsystem_vendor_id != PCI_VENDOR_ID_VMWARE)
1081 netdev->priv_flags |= IFF_UNICAST_FLT;
1083 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1085 /* initialize eeprom parameters */
1086 if (e1000_init_eeprom_params(hw)) {
1087 e_err(probe, "EEPROM initialization failed\n");
1091 /* before reading the EEPROM, reset the controller to
1092 * put the device in a known good starting state
1097 /* make sure the EEPROM is good */
1098 if (e1000_validate_eeprom_checksum(hw) < 0) {
1099 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1100 e1000_dump_eeprom(adapter);
1101 /* set MAC address to all zeroes to invalidate and temporary
1102 * disable this device for the user. This blocks regular
1103 * traffic while still permitting ethtool ioctls from reaching
1104 * the hardware as well as allowing the user to run the
1105 * interface after manually setting a hw addr using
1108 memset(hw->mac_addr, 0, netdev->addr_len);
1110 /* copy the MAC address out of the EEPROM */
1111 if (e1000_read_mac_addr(hw))
1112 e_err(probe, "EEPROM Read Error\n");
1114 /* don't block initalization here due to bad MAC address */
1115 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1117 if (!is_valid_ether_addr(netdev->dev_addr))
1118 e_err(probe, "Invalid MAC Address\n");
1121 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1122 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1123 e1000_82547_tx_fifo_stall_task);
1124 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1125 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1127 e1000_check_options(adapter);
1129 /* Initial Wake on LAN setting
1130 * If APM wake is enabled in the EEPROM,
1131 * enable the ACPI Magic Packet filter
1134 switch (hw->mac_type) {
1135 case e1000_82542_rev2_0:
1136 case e1000_82542_rev2_1:
1140 e1000_read_eeprom(hw,
1141 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1142 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1145 case e1000_82546_rev_3:
1146 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1147 e1000_read_eeprom(hw,
1148 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1153 e1000_read_eeprom(hw,
1154 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1157 if (eeprom_data & eeprom_apme_mask)
1158 adapter->eeprom_wol |= E1000_WUFC_MAG;
1160 /* now that we have the eeprom settings, apply the special cases
1161 * where the eeprom may be wrong or the board simply won't support
1162 * wake on lan on a particular port
1164 switch (pdev->device) {
1165 case E1000_DEV_ID_82546GB_PCIE:
1166 adapter->eeprom_wol = 0;
1168 case E1000_DEV_ID_82546EB_FIBER:
1169 case E1000_DEV_ID_82546GB_FIBER:
1170 /* Wake events only supported on port A for dual fiber
1171 * regardless of eeprom setting
1173 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1174 adapter->eeprom_wol = 0;
1176 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1177 /* if quad port adapter, disable WoL on all but port A */
1178 if (global_quad_port_a != 0)
1179 adapter->eeprom_wol = 0;
1181 adapter->quad_port_a = true;
1182 /* Reset for multiple quad port adapters */
1183 if (++global_quad_port_a == 4)
1184 global_quad_port_a = 0;
1188 /* initialize the wol settings based on the eeprom settings */
1189 adapter->wol = adapter->eeprom_wol;
1190 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1192 /* Auto detect PHY address */
1193 if (hw->mac_type == e1000_ce4100) {
1194 for (i = 0; i < 32; i++) {
1196 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1197 if (tmp == 0 || tmp == 0xFF) {
1206 /* reset the hardware with the new settings */
1207 e1000_reset(adapter);
1209 strcpy(netdev->name, "eth%d");
1210 err = register_netdev(netdev);
1214 e1000_vlan_filter_on_off(adapter, false);
1216 /* print bus type/speed/width info */
1217 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1218 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1219 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1220 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1221 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1222 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1223 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1226 /* carrier off reporting is important to ethtool even BEFORE open */
1227 netif_carrier_off(netdev);
1229 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1236 e1000_phy_hw_reset(hw);
1238 if (hw->flash_address)
1239 iounmap(hw->flash_address);
1240 kfree(adapter->tx_ring);
1241 kfree(adapter->rx_ring);
1245 iounmap(hw->ce4100_gbe_mdio_base_virt);
1246 iounmap(hw->hw_addr);
1248 free_netdev(netdev);
1250 pci_release_selected_regions(pdev, bars);
1252 pci_disable_device(pdev);
1257 * e1000_remove - Device Removal Routine
1258 * @pdev: PCI device information struct
1260 * e1000_remove is called by the PCI subsystem to alert the driver
1261 * that it should release a PCI device. The could be caused by a
1262 * Hot-Plug event, or because the driver is going to be removed from
1265 static void e1000_remove(struct pci_dev *pdev)
1267 struct net_device *netdev = pci_get_drvdata(pdev);
1268 struct e1000_adapter *adapter = netdev_priv(netdev);
1269 struct e1000_hw *hw = &adapter->hw;
1271 e1000_down_and_stop(adapter);
1272 e1000_release_manageability(adapter);
1274 unregister_netdev(netdev);
1276 e1000_phy_hw_reset(hw);
1278 kfree(adapter->tx_ring);
1279 kfree(adapter->rx_ring);
1281 if (hw->mac_type == e1000_ce4100)
1282 iounmap(hw->ce4100_gbe_mdio_base_virt);
1283 iounmap(hw->hw_addr);
1284 if (hw->flash_address)
1285 iounmap(hw->flash_address);
1286 pci_release_selected_regions(pdev, adapter->bars);
1288 free_netdev(netdev);
1290 pci_disable_device(pdev);
1294 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1295 * @adapter: board private structure to initialize
1297 * e1000_sw_init initializes the Adapter private data structure.
1298 * e1000_init_hw_struct MUST be called before this function
1300 static int e1000_sw_init(struct e1000_adapter *adapter)
1302 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1304 adapter->num_tx_queues = 1;
1305 adapter->num_rx_queues = 1;
1307 if (e1000_alloc_queues(adapter)) {
1308 e_err(probe, "Unable to allocate memory for queues\n");
1312 /* Explicitly disable IRQ since the NIC can be in any state. */
1313 e1000_irq_disable(adapter);
1315 spin_lock_init(&adapter->stats_lock);
1317 set_bit(__E1000_DOWN, &adapter->flags);
1323 * e1000_alloc_queues - Allocate memory for all rings
1324 * @adapter: board private structure to initialize
1326 * We allocate one ring per queue at run-time since we don't know the
1327 * number of queues at compile-time.
1329 static int e1000_alloc_queues(struct e1000_adapter *adapter)
1331 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1332 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1333 if (!adapter->tx_ring)
1336 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1337 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1338 if (!adapter->rx_ring) {
1339 kfree(adapter->tx_ring);
1343 return E1000_SUCCESS;
1347 * e1000_open - Called when a network interface is made active
1348 * @netdev: network interface device structure
1350 * Returns 0 on success, negative value on failure
1352 * The open entry point is called when a network interface is made
1353 * active by the system (IFF_UP). At this point all resources needed
1354 * for transmit and receive operations are allocated, the interrupt
1355 * handler is registered with the OS, the watchdog task is started,
1356 * and the stack is notified that the interface is ready.
1358 static int e1000_open(struct net_device *netdev)
1360 struct e1000_adapter *adapter = netdev_priv(netdev);
1361 struct e1000_hw *hw = &adapter->hw;
1364 /* disallow open during test */
1365 if (test_bit(__E1000_TESTING, &adapter->flags))
1368 netif_carrier_off(netdev);
1370 /* allocate transmit descriptors */
1371 err = e1000_setup_all_tx_resources(adapter);
1375 /* allocate receive descriptors */
1376 err = e1000_setup_all_rx_resources(adapter);
1380 e1000_power_up_phy(adapter);
1382 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1383 if ((hw->mng_cookie.status &
1384 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1385 e1000_update_mng_vlan(adapter);
1388 /* before we allocate an interrupt, we must be ready to handle it.
1389 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1390 * as soon as we call pci_request_irq, so we have to setup our
1391 * clean_rx handler before we do so.
1393 e1000_configure(adapter);
1395 err = e1000_request_irq(adapter);
1399 /* From here on the code is the same as e1000_up() */
1400 clear_bit(__E1000_DOWN, &adapter->flags);
1402 napi_enable(&adapter->napi);
1404 e1000_irq_enable(adapter);
1406 netif_start_queue(netdev);
1408 /* fire a link status change interrupt to start the watchdog */
1409 ew32(ICS, E1000_ICS_LSC);
1411 return E1000_SUCCESS;
1414 e1000_power_down_phy(adapter);
1415 e1000_free_all_rx_resources(adapter);
1417 e1000_free_all_tx_resources(adapter);
1419 e1000_reset(adapter);
1425 * e1000_close - Disables a network interface
1426 * @netdev: network interface device structure
1428 * Returns 0, this is not allowed to fail
1430 * The close entry point is called when an interface is de-activated
1431 * by the OS. The hardware is still under the drivers control, but
1432 * needs to be disabled. A global MAC reset is issued to stop the
1433 * hardware, and all transmit and receive resources are freed.
1435 static int e1000_close(struct net_device *netdev)
1437 struct e1000_adapter *adapter = netdev_priv(netdev);
1438 struct e1000_hw *hw = &adapter->hw;
1439 int count = E1000_CHECK_RESET_COUNT;
1441 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
1442 usleep_range(10000, 20000);
1444 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1445 e1000_down(adapter);
1446 e1000_power_down_phy(adapter);
1447 e1000_free_irq(adapter);
1449 e1000_free_all_tx_resources(adapter);
1450 e1000_free_all_rx_resources(adapter);
1452 /* kill manageability vlan ID if supported, but not if a vlan with
1453 * the same ID is registered on the host OS (let 8021q kill it)
1455 if ((hw->mng_cookie.status &
1456 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1457 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1458 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
1459 adapter->mng_vlan_id);
1466 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1467 * @adapter: address of board private structure
1468 * @start: address of beginning of memory
1469 * @len: length of memory
1471 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1474 struct e1000_hw *hw = &adapter->hw;
1475 unsigned long begin = (unsigned long)start;
1476 unsigned long end = begin + len;
1478 /* First rev 82545 and 82546 need to not allow any memory
1479 * write location to cross 64k boundary due to errata 23
1481 if (hw->mac_type == e1000_82545 ||
1482 hw->mac_type == e1000_ce4100 ||
1483 hw->mac_type == e1000_82546) {
1484 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1491 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1492 * @adapter: board private structure
1493 * @txdr: tx descriptor ring (for a specific queue) to setup
1495 * Return 0 on success, negative on failure
1497 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1498 struct e1000_tx_ring *txdr)
1500 struct pci_dev *pdev = adapter->pdev;
1503 size = sizeof(struct e1000_tx_buffer) * txdr->count;
1504 txdr->buffer_info = vzalloc(size);
1505 if (!txdr->buffer_info)
1508 /* round up to nearest 4K */
1510 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1511 txdr->size = ALIGN(txdr->size, 4096);
1513 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1517 vfree(txdr->buffer_info);
1521 /* Fix for errata 23, can't cross 64kB boundary */
1522 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1523 void *olddesc = txdr->desc;
1524 dma_addr_t olddma = txdr->dma;
1525 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1526 txdr->size, txdr->desc);
1527 /* Try again, without freeing the previous */
1528 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1529 &txdr->dma, GFP_KERNEL);
1530 /* Failed allocation, critical failure */
1532 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1534 goto setup_tx_desc_die;
1537 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1539 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1541 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1543 e_err(probe, "Unable to allocate aligned memory "
1544 "for the transmit descriptor ring\n");
1545 vfree(txdr->buffer_info);
1548 /* Free old allocation, new allocation was successful */
1549 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1553 memset(txdr->desc, 0, txdr->size);
1555 txdr->next_to_use = 0;
1556 txdr->next_to_clean = 0;
1562 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1563 * (Descriptors) for all queues
1564 * @adapter: board private structure
1566 * Return 0 on success, negative on failure
1568 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1572 for (i = 0; i < adapter->num_tx_queues; i++) {
1573 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1575 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1576 for (i-- ; i >= 0; i--)
1577 e1000_free_tx_resources(adapter,
1578 &adapter->tx_ring[i]);
1587 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1588 * @adapter: board private structure
1590 * Configure the Tx unit of the MAC after a reset.
1592 static void e1000_configure_tx(struct e1000_adapter *adapter)
1595 struct e1000_hw *hw = &adapter->hw;
1596 u32 tdlen, tctl, tipg;
1599 /* Setup the HW Tx Head and Tail descriptor pointers */
1601 switch (adapter->num_tx_queues) {
1604 tdba = adapter->tx_ring[0].dma;
1605 tdlen = adapter->tx_ring[0].count *
1606 sizeof(struct e1000_tx_desc);
1608 ew32(TDBAH, (tdba >> 32));
1609 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1612 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ?
1613 E1000_TDH : E1000_82542_TDH);
1614 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ?
1615 E1000_TDT : E1000_82542_TDT);
1619 /* Set the default values for the Tx Inter Packet Gap timer */
1620 if ((hw->media_type == e1000_media_type_fiber ||
1621 hw->media_type == e1000_media_type_internal_serdes))
1622 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1624 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1626 switch (hw->mac_type) {
1627 case e1000_82542_rev2_0:
1628 case e1000_82542_rev2_1:
1629 tipg = DEFAULT_82542_TIPG_IPGT;
1630 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1631 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1634 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1635 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1638 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1639 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1642 /* Set the Tx Interrupt Delay register */
1644 ew32(TIDV, adapter->tx_int_delay);
1645 if (hw->mac_type >= e1000_82540)
1646 ew32(TADV, adapter->tx_abs_int_delay);
1648 /* Program the Transmit Control Register */
1651 tctl &= ~E1000_TCTL_CT;
1652 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1653 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1655 e1000_config_collision_dist(hw);
1657 /* Setup Transmit Descriptor Settings for eop descriptor */
1658 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1660 /* only set IDE if we are delaying interrupts using the timers */
1661 if (adapter->tx_int_delay)
1662 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1664 if (hw->mac_type < e1000_82543)
1665 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1667 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1669 /* Cache if we're 82544 running in PCI-X because we'll
1670 * need this to apply a workaround later in the send path.
1672 if (hw->mac_type == e1000_82544 &&
1673 hw->bus_type == e1000_bus_type_pcix)
1674 adapter->pcix_82544 = true;
1681 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1682 * @adapter: board private structure
1683 * @rxdr: rx descriptor ring (for a specific queue) to setup
1685 * Returns 0 on success, negative on failure
1687 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1688 struct e1000_rx_ring *rxdr)
1690 struct pci_dev *pdev = adapter->pdev;
1693 size = sizeof(struct e1000_rx_buffer) * rxdr->count;
1694 rxdr->buffer_info = vzalloc(size);
1695 if (!rxdr->buffer_info)
1698 desc_len = sizeof(struct e1000_rx_desc);
1700 /* Round up to nearest 4K */
1702 rxdr->size = rxdr->count * desc_len;
1703 rxdr->size = ALIGN(rxdr->size, 4096);
1705 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1709 vfree(rxdr->buffer_info);
1713 /* Fix for errata 23, can't cross 64kB boundary */
1714 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1715 void *olddesc = rxdr->desc;
1716 dma_addr_t olddma = rxdr->dma;
1717 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1718 rxdr->size, rxdr->desc);
1719 /* Try again, without freeing the previous */
1720 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1721 &rxdr->dma, GFP_KERNEL);
1722 /* Failed allocation, critical failure */
1724 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1726 goto setup_rx_desc_die;
1729 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1731 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1733 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1735 e_err(probe, "Unable to allocate aligned memory for "
1736 "the Rx descriptor ring\n");
1737 goto setup_rx_desc_die;
1739 /* Free old allocation, new allocation was successful */
1740 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1744 memset(rxdr->desc, 0, rxdr->size);
1746 rxdr->next_to_clean = 0;
1747 rxdr->next_to_use = 0;
1748 rxdr->rx_skb_top = NULL;
1754 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1755 * (Descriptors) for all queues
1756 * @adapter: board private structure
1758 * Return 0 on success, negative on failure
1760 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1764 for (i = 0; i < adapter->num_rx_queues; i++) {
1765 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1767 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1768 for (i-- ; i >= 0; i--)
1769 e1000_free_rx_resources(adapter,
1770 &adapter->rx_ring[i]);
1779 * e1000_setup_rctl - configure the receive control registers
1780 * @adapter: Board private structure
1782 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1784 struct e1000_hw *hw = &adapter->hw;
1789 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1791 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1792 E1000_RCTL_RDMTS_HALF |
1793 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1795 if (hw->tbi_compatibility_on == 1)
1796 rctl |= E1000_RCTL_SBP;
1798 rctl &= ~E1000_RCTL_SBP;
1800 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1801 rctl &= ~E1000_RCTL_LPE;
1803 rctl |= E1000_RCTL_LPE;
1805 /* Setup buffer sizes */
1806 rctl &= ~E1000_RCTL_SZ_4096;
1807 rctl |= E1000_RCTL_BSEX;
1808 switch (adapter->rx_buffer_len) {
1809 case E1000_RXBUFFER_2048:
1811 rctl |= E1000_RCTL_SZ_2048;
1812 rctl &= ~E1000_RCTL_BSEX;
1814 case E1000_RXBUFFER_4096:
1815 rctl |= E1000_RCTL_SZ_4096;
1817 case E1000_RXBUFFER_8192:
1818 rctl |= E1000_RCTL_SZ_8192;
1820 case E1000_RXBUFFER_16384:
1821 rctl |= E1000_RCTL_SZ_16384;
1825 /* This is useful for sniffing bad packets. */
1826 if (adapter->netdev->features & NETIF_F_RXALL) {
1827 /* UPE and MPE will be handled by normal PROMISC logic
1828 * in e1000e_set_rx_mode
1830 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
1831 E1000_RCTL_BAM | /* RX All Bcast Pkts */
1832 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
1834 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
1835 E1000_RCTL_DPF | /* Allow filtered pause */
1836 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
1837 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1838 * and that breaks VLANs.
1846 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1847 * @adapter: board private structure
1849 * Configure the Rx unit of the MAC after a reset.
1851 static void e1000_configure_rx(struct e1000_adapter *adapter)
1854 struct e1000_hw *hw = &adapter->hw;
1855 u32 rdlen, rctl, rxcsum;
1857 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1858 rdlen = adapter->rx_ring[0].count *
1859 sizeof(struct e1000_rx_desc);
1860 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1861 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1863 rdlen = adapter->rx_ring[0].count *
1864 sizeof(struct e1000_rx_desc);
1865 adapter->clean_rx = e1000_clean_rx_irq;
1866 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1869 /* disable receives while setting up the descriptors */
1871 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1873 /* set the Receive Delay Timer Register */
1874 ew32(RDTR, adapter->rx_int_delay);
1876 if (hw->mac_type >= e1000_82540) {
1877 ew32(RADV, adapter->rx_abs_int_delay);
1878 if (adapter->itr_setting != 0)
1879 ew32(ITR, 1000000000 / (adapter->itr * 256));
1882 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1883 * the Base and Length of the Rx Descriptor Ring
1885 switch (adapter->num_rx_queues) {
1888 rdba = adapter->rx_ring[0].dma;
1890 ew32(RDBAH, (rdba >> 32));
1891 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1894 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ?
1895 E1000_RDH : E1000_82542_RDH);
1896 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ?
1897 E1000_RDT : E1000_82542_RDT);
1901 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1902 if (hw->mac_type >= e1000_82543) {
1903 rxcsum = er32(RXCSUM);
1904 if (adapter->rx_csum)
1905 rxcsum |= E1000_RXCSUM_TUOFL;
1907 /* don't need to clear IPPCSE as it defaults to 0 */
1908 rxcsum &= ~E1000_RXCSUM_TUOFL;
1909 ew32(RXCSUM, rxcsum);
1912 /* Enable Receives */
1913 ew32(RCTL, rctl | E1000_RCTL_EN);
1917 * e1000_free_tx_resources - Free Tx Resources per Queue
1918 * @adapter: board private structure
1919 * @tx_ring: Tx descriptor ring for a specific queue
1921 * Free all transmit software resources
1923 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1924 struct e1000_tx_ring *tx_ring)
1926 struct pci_dev *pdev = adapter->pdev;
1928 e1000_clean_tx_ring(adapter, tx_ring);
1930 vfree(tx_ring->buffer_info);
1931 tx_ring->buffer_info = NULL;
1933 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1936 tx_ring->desc = NULL;
1940 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1941 * @adapter: board private structure
1943 * Free all transmit software resources
1945 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1949 for (i = 0; i < adapter->num_tx_queues; i++)
1950 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1954 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1955 struct e1000_tx_buffer *buffer_info)
1957 if (buffer_info->dma) {
1958 if (buffer_info->mapped_as_page)
1959 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1960 buffer_info->length, DMA_TO_DEVICE);
1962 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1963 buffer_info->length,
1965 buffer_info->dma = 0;
1967 if (buffer_info->skb) {
1968 dev_kfree_skb_any(buffer_info->skb);
1969 buffer_info->skb = NULL;
1971 buffer_info->time_stamp = 0;
1972 /* buffer_info must be completely set up in the transmit path */
1976 * e1000_clean_tx_ring - Free Tx Buffers
1977 * @adapter: board private structure
1978 * @tx_ring: ring to be cleaned
1980 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1981 struct e1000_tx_ring *tx_ring)
1983 struct e1000_hw *hw = &adapter->hw;
1984 struct e1000_tx_buffer *buffer_info;
1988 /* Free all the Tx ring sk_buffs */
1990 for (i = 0; i < tx_ring->count; i++) {
1991 buffer_info = &tx_ring->buffer_info[i];
1992 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1995 netdev_reset_queue(adapter->netdev);
1996 size = sizeof(struct e1000_tx_buffer) * tx_ring->count;
1997 memset(tx_ring->buffer_info, 0, size);
1999 /* Zero out the descriptor ring */
2001 memset(tx_ring->desc, 0, tx_ring->size);
2003 tx_ring->next_to_use = 0;
2004 tx_ring->next_to_clean = 0;
2005 tx_ring->last_tx_tso = false;
2007 writel(0, hw->hw_addr + tx_ring->tdh);
2008 writel(0, hw->hw_addr + tx_ring->tdt);
2012 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2013 * @adapter: board private structure
2015 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2019 for (i = 0; i < adapter->num_tx_queues; i++)
2020 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2024 * e1000_free_rx_resources - Free Rx Resources
2025 * @adapter: board private structure
2026 * @rx_ring: ring to clean the resources from
2028 * Free all receive software resources
2030 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2031 struct e1000_rx_ring *rx_ring)
2033 struct pci_dev *pdev = adapter->pdev;
2035 e1000_clean_rx_ring(adapter, rx_ring);
2037 vfree(rx_ring->buffer_info);
2038 rx_ring->buffer_info = NULL;
2040 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2043 rx_ring->desc = NULL;
2047 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2048 * @adapter: board private structure
2050 * Free all receive software resources
2052 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2056 for (i = 0; i < adapter->num_rx_queues; i++)
2057 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2060 #define E1000_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN)
2061 static unsigned int e1000_frag_len(const struct e1000_adapter *a)
2063 return SKB_DATA_ALIGN(a->rx_buffer_len + E1000_HEADROOM) +
2064 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
2067 static void *e1000_alloc_frag(const struct e1000_adapter *a)
2069 unsigned int len = e1000_frag_len(a);
2070 u8 *data = netdev_alloc_frag(len);
2073 data += E1000_HEADROOM;
2077 static void e1000_free_frag(const void *data)
2079 put_page(virt_to_head_page(data));
2083 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2084 * @adapter: board private structure
2085 * @rx_ring: ring to free buffers from
2087 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2088 struct e1000_rx_ring *rx_ring)
2090 struct e1000_hw *hw = &adapter->hw;
2091 struct e1000_rx_buffer *buffer_info;
2092 struct pci_dev *pdev = adapter->pdev;
2096 /* Free all the Rx netfrags */
2097 for (i = 0; i < rx_ring->count; i++) {
2098 buffer_info = &rx_ring->buffer_info[i];
2099 if (adapter->clean_rx == e1000_clean_rx_irq) {
2100 if (buffer_info->dma)
2101 dma_unmap_single(&pdev->dev, buffer_info->dma,
2102 adapter->rx_buffer_len,
2104 if (buffer_info->rxbuf.data) {
2105 e1000_free_frag(buffer_info->rxbuf.data);
2106 buffer_info->rxbuf.data = NULL;
2108 } else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2109 if (buffer_info->dma)
2110 dma_unmap_page(&pdev->dev, buffer_info->dma,
2111 adapter->rx_buffer_len,
2113 if (buffer_info->rxbuf.page) {
2114 put_page(buffer_info->rxbuf.page);
2115 buffer_info->rxbuf.page = NULL;
2119 buffer_info->dma = 0;
2122 /* there also may be some cached data from a chained receive */
2123 napi_free_frags(&adapter->napi);
2124 rx_ring->rx_skb_top = NULL;
2126 size = sizeof(struct e1000_rx_buffer) * rx_ring->count;
2127 memset(rx_ring->buffer_info, 0, size);
2129 /* Zero out the descriptor ring */
2130 memset(rx_ring->desc, 0, rx_ring->size);
2132 rx_ring->next_to_clean = 0;
2133 rx_ring->next_to_use = 0;
2135 writel(0, hw->hw_addr + rx_ring->rdh);
2136 writel(0, hw->hw_addr + rx_ring->rdt);
2140 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2141 * @adapter: board private structure
2143 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2147 for (i = 0; i < adapter->num_rx_queues; i++)
2148 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2151 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2152 * and memory write and invalidate disabled for certain operations
2154 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2156 struct e1000_hw *hw = &adapter->hw;
2157 struct net_device *netdev = adapter->netdev;
2160 e1000_pci_clear_mwi(hw);
2163 rctl |= E1000_RCTL_RST;
2165 E1000_WRITE_FLUSH();
2168 if (netif_running(netdev))
2169 e1000_clean_all_rx_rings(adapter);
2172 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2174 struct e1000_hw *hw = &adapter->hw;
2175 struct net_device *netdev = adapter->netdev;
2179 rctl &= ~E1000_RCTL_RST;
2181 E1000_WRITE_FLUSH();
2184 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2185 e1000_pci_set_mwi(hw);
2187 if (netif_running(netdev)) {
2188 /* No need to loop, because 82542 supports only 1 queue */
2189 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2190 e1000_configure_rx(adapter);
2191 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2196 * e1000_set_mac - Change the Ethernet Address of the NIC
2197 * @netdev: network interface device structure
2198 * @p: pointer to an address structure
2200 * Returns 0 on success, negative on failure
2202 static int e1000_set_mac(struct net_device *netdev, void *p)
2204 struct e1000_adapter *adapter = netdev_priv(netdev);
2205 struct e1000_hw *hw = &adapter->hw;
2206 struct sockaddr *addr = p;
2208 if (!is_valid_ether_addr(addr->sa_data))
2209 return -EADDRNOTAVAIL;
2211 /* 82542 2.0 needs to be in reset to write receive address registers */
2213 if (hw->mac_type == e1000_82542_rev2_0)
2214 e1000_enter_82542_rst(adapter);
2216 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2217 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2219 e1000_rar_set(hw, hw->mac_addr, 0);
2221 if (hw->mac_type == e1000_82542_rev2_0)
2222 e1000_leave_82542_rst(adapter);
2228 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2229 * @netdev: network interface device structure
2231 * The set_rx_mode entry point is called whenever the unicast or multicast
2232 * address lists or the network interface flags are updated. This routine is
2233 * responsible for configuring the hardware for proper unicast, multicast,
2234 * promiscuous mode, and all-multi behavior.
2236 static void e1000_set_rx_mode(struct net_device *netdev)
2238 struct e1000_adapter *adapter = netdev_priv(netdev);
2239 struct e1000_hw *hw = &adapter->hw;
2240 struct netdev_hw_addr *ha;
2241 bool use_uc = false;
2244 int i, rar_entries = E1000_RAR_ENTRIES;
2245 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2246 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2251 /* Check for Promiscuous and All Multicast modes */
2255 if (netdev->flags & IFF_PROMISC) {
2256 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2257 rctl &= ~E1000_RCTL_VFE;
2259 if (netdev->flags & IFF_ALLMULTI)
2260 rctl |= E1000_RCTL_MPE;
2262 rctl &= ~E1000_RCTL_MPE;
2263 /* Enable VLAN filter if there is a VLAN */
2264 if (e1000_vlan_used(adapter))
2265 rctl |= E1000_RCTL_VFE;
2268 if (netdev_uc_count(netdev) > rar_entries - 1) {
2269 rctl |= E1000_RCTL_UPE;
2270 } else if (!(netdev->flags & IFF_PROMISC)) {
2271 rctl &= ~E1000_RCTL_UPE;
2277 /* 82542 2.0 needs to be in reset to write receive address registers */
2279 if (hw->mac_type == e1000_82542_rev2_0)
2280 e1000_enter_82542_rst(adapter);
2282 /* load the first 14 addresses into the exact filters 1-14. Unicast
2283 * addresses take precedence to avoid disabling unicast filtering
2286 * RAR 0 is used for the station MAC address
2287 * if there are not 14 addresses, go ahead and clear the filters
2291 netdev_for_each_uc_addr(ha, netdev) {
2292 if (i == rar_entries)
2294 e1000_rar_set(hw, ha->addr, i++);
2297 netdev_for_each_mc_addr(ha, netdev) {
2298 if (i == rar_entries) {
2299 /* load any remaining addresses into the hash table */
2300 u32 hash_reg, hash_bit, mta;
2301 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2302 hash_reg = (hash_value >> 5) & 0x7F;
2303 hash_bit = hash_value & 0x1F;
2304 mta = (1 << hash_bit);
2305 mcarray[hash_reg] |= mta;
2307 e1000_rar_set(hw, ha->addr, i++);
2311 for (; i < rar_entries; i++) {
2312 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2313 E1000_WRITE_FLUSH();
2314 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2315 E1000_WRITE_FLUSH();
2318 /* write the hash table completely, write from bottom to avoid
2319 * both stupid write combining chipsets, and flushing each write
2321 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2322 /* If we are on an 82544 has an errata where writing odd
2323 * offsets overwrites the previous even offset, but writing
2324 * backwards over the range solves the issue by always
2325 * writing the odd offset first
2327 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2329 E1000_WRITE_FLUSH();
2331 if (hw->mac_type == e1000_82542_rev2_0)
2332 e1000_leave_82542_rst(adapter);
2338 * e1000_update_phy_info_task - get phy info
2339 * @work: work struct contained inside adapter struct
2341 * Need to wait a few seconds after link up to get diagnostic information from
2344 static void e1000_update_phy_info_task(struct work_struct *work)
2346 struct e1000_adapter *adapter = container_of(work,
2347 struct e1000_adapter,
2348 phy_info_task.work);
2350 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2354 * e1000_82547_tx_fifo_stall_task - task to complete work
2355 * @work: work struct contained inside adapter struct
2357 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2359 struct e1000_adapter *adapter = container_of(work,
2360 struct e1000_adapter,
2361 fifo_stall_task.work);
2362 struct e1000_hw *hw = &adapter->hw;
2363 struct net_device *netdev = adapter->netdev;
2366 if (atomic_read(&adapter->tx_fifo_stall)) {
2367 if ((er32(TDT) == er32(TDH)) &&
2368 (er32(TDFT) == er32(TDFH)) &&
2369 (er32(TDFTS) == er32(TDFHS))) {
2371 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2372 ew32(TDFT, adapter->tx_head_addr);
2373 ew32(TDFH, adapter->tx_head_addr);
2374 ew32(TDFTS, adapter->tx_head_addr);
2375 ew32(TDFHS, adapter->tx_head_addr);
2377 E1000_WRITE_FLUSH();
2379 adapter->tx_fifo_head = 0;
2380 atomic_set(&adapter->tx_fifo_stall, 0);
2381 netif_wake_queue(netdev);
2382 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2383 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2388 bool e1000_has_link(struct e1000_adapter *adapter)
2390 struct e1000_hw *hw = &adapter->hw;
2391 bool link_active = false;
2393 /* get_link_status is set on LSC (link status) interrupt or rx
2394 * sequence error interrupt (except on intel ce4100).
2395 * get_link_status will stay false until the
2396 * e1000_check_for_link establishes link for copper adapters
2399 switch (hw->media_type) {
2400 case e1000_media_type_copper:
2401 if (hw->mac_type == e1000_ce4100)
2402 hw->get_link_status = 1;
2403 if (hw->get_link_status) {
2404 e1000_check_for_link(hw);
2405 link_active = !hw->get_link_status;
2410 case e1000_media_type_fiber:
2411 e1000_check_for_link(hw);
2412 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2414 case e1000_media_type_internal_serdes:
2415 e1000_check_for_link(hw);
2416 link_active = hw->serdes_has_link;
2426 * e1000_watchdog - work function
2427 * @work: work struct contained inside adapter struct
2429 static void e1000_watchdog(struct work_struct *work)
2431 struct e1000_adapter *adapter = container_of(work,
2432 struct e1000_adapter,
2433 watchdog_task.work);
2434 struct e1000_hw *hw = &adapter->hw;
2435 struct net_device *netdev = adapter->netdev;
2436 struct e1000_tx_ring *txdr = adapter->tx_ring;
2439 link = e1000_has_link(adapter);
2440 if ((netif_carrier_ok(netdev)) && link)
2444 if (!netif_carrier_ok(netdev)) {
2447 /* update snapshot of PHY registers on LSC */
2448 e1000_get_speed_and_duplex(hw,
2449 &adapter->link_speed,
2450 &adapter->link_duplex);
2453 pr_info("%s NIC Link is Up %d Mbps %s, "
2454 "Flow Control: %s\n",
2456 adapter->link_speed,
2457 adapter->link_duplex == FULL_DUPLEX ?
2458 "Full Duplex" : "Half Duplex",
2459 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2460 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2461 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2462 E1000_CTRL_TFCE) ? "TX" : "None")));
2464 /* adjust timeout factor according to speed/duplex */
2465 adapter->tx_timeout_factor = 1;
2466 switch (adapter->link_speed) {
2469 adapter->tx_timeout_factor = 16;
2473 /* maybe add some timeout factor ? */
2477 /* enable transmits in the hardware */
2479 tctl |= E1000_TCTL_EN;
2482 netif_carrier_on(netdev);
2483 if (!test_bit(__E1000_DOWN, &adapter->flags))
2484 schedule_delayed_work(&adapter->phy_info_task,
2486 adapter->smartspeed = 0;
2489 if (netif_carrier_ok(netdev)) {
2490 adapter->link_speed = 0;
2491 adapter->link_duplex = 0;
2492 pr_info("%s NIC Link is Down\n",
2494 netif_carrier_off(netdev);
2496 if (!test_bit(__E1000_DOWN, &adapter->flags))
2497 schedule_delayed_work(&adapter->phy_info_task,
2501 e1000_smartspeed(adapter);
2505 e1000_update_stats(adapter);
2507 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2508 adapter->tpt_old = adapter->stats.tpt;
2509 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2510 adapter->colc_old = adapter->stats.colc;
2512 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2513 adapter->gorcl_old = adapter->stats.gorcl;
2514 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2515 adapter->gotcl_old = adapter->stats.gotcl;
2517 e1000_update_adaptive(hw);
2519 if (!netif_carrier_ok(netdev)) {
2520 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2521 /* We've lost link, so the controller stops DMA,
2522 * but we've got queued Tx work that's never going
2523 * to get done, so reset controller to flush Tx.
2524 * (Do the reset outside of interrupt context).
2526 adapter->tx_timeout_count++;
2527 schedule_work(&adapter->reset_task);
2528 /* exit immediately since reset is imminent */
2533 /* Simple mode for Interrupt Throttle Rate (ITR) */
2534 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2535 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2536 * Total asymmetrical Tx or Rx gets ITR=8000;
2537 * everyone else is between 2000-8000.
2539 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2540 u32 dif = (adapter->gotcl > adapter->gorcl ?
2541 adapter->gotcl - adapter->gorcl :
2542 adapter->gorcl - adapter->gotcl) / 10000;
2543 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2545 ew32(ITR, 1000000000 / (itr * 256));
2548 /* Cause software interrupt to ensure rx ring is cleaned */
2549 ew32(ICS, E1000_ICS_RXDMT0);
2551 /* Force detection of hung controller every watchdog period */
2552 adapter->detect_tx_hung = true;
2554 /* Reschedule the task */
2555 if (!test_bit(__E1000_DOWN, &adapter->flags))
2556 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2559 enum latency_range {
2563 latency_invalid = 255
2567 * e1000_update_itr - update the dynamic ITR value based on statistics
2568 * @adapter: pointer to adapter
2569 * @itr_setting: current adapter->itr
2570 * @packets: the number of packets during this measurement interval
2571 * @bytes: the number of bytes during this measurement interval
2573 * Stores a new ITR value based on packets and byte
2574 * counts during the last interrupt. The advantage of per interrupt
2575 * computation is faster updates and more accurate ITR for the current
2576 * traffic pattern. Constants in this function were computed
2577 * based on theoretical maximum wire speed and thresholds were set based
2578 * on testing data as well as attempting to minimize response time
2579 * while increasing bulk throughput.
2580 * this functionality is controlled by the InterruptThrottleRate module
2581 * parameter (see e1000_param.c)
2583 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2584 u16 itr_setting, int packets, int bytes)
2586 unsigned int retval = itr_setting;
2587 struct e1000_hw *hw = &adapter->hw;
2589 if (unlikely(hw->mac_type < e1000_82540))
2590 goto update_itr_done;
2593 goto update_itr_done;
2595 switch (itr_setting) {
2596 case lowest_latency:
2597 /* jumbo frames get bulk treatment*/
2598 if (bytes/packets > 8000)
2599 retval = bulk_latency;
2600 else if ((packets < 5) && (bytes > 512))
2601 retval = low_latency;
2603 case low_latency: /* 50 usec aka 20000 ints/s */
2604 if (bytes > 10000) {
2605 /* jumbo frames need bulk latency setting */
2606 if (bytes/packets > 8000)
2607 retval = bulk_latency;
2608 else if ((packets < 10) || ((bytes/packets) > 1200))
2609 retval = bulk_latency;
2610 else if ((packets > 35))
2611 retval = lowest_latency;
2612 } else if (bytes/packets > 2000)
2613 retval = bulk_latency;
2614 else if (packets <= 2 && bytes < 512)
2615 retval = lowest_latency;
2617 case bulk_latency: /* 250 usec aka 4000 ints/s */
2618 if (bytes > 25000) {
2620 retval = low_latency;
2621 } else if (bytes < 6000) {
2622 retval = low_latency;
2631 static void e1000_set_itr(struct e1000_adapter *adapter)
2633 struct e1000_hw *hw = &adapter->hw;
2635 u32 new_itr = adapter->itr;
2637 if (unlikely(hw->mac_type < e1000_82540))
2640 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2641 if (unlikely(adapter->link_speed != SPEED_1000)) {
2647 adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr,
2648 adapter->total_tx_packets,
2649 adapter->total_tx_bytes);
2650 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2651 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2652 adapter->tx_itr = low_latency;
2654 adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr,
2655 adapter->total_rx_packets,
2656 adapter->total_rx_bytes);
2657 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2658 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2659 adapter->rx_itr = low_latency;
2661 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2663 switch (current_itr) {
2664 /* counts and packets in update_itr are dependent on these numbers */
2665 case lowest_latency:
2669 new_itr = 20000; /* aka hwitr = ~200 */
2679 if (new_itr != adapter->itr) {
2680 /* this attempts to bias the interrupt rate towards Bulk
2681 * by adding intermediate steps when interrupt rate is
2684 new_itr = new_itr > adapter->itr ?
2685 min(adapter->itr + (new_itr >> 2), new_itr) :
2687 adapter->itr = new_itr;
2688 ew32(ITR, 1000000000 / (new_itr * 256));
2692 #define E1000_TX_FLAGS_CSUM 0x00000001
2693 #define E1000_TX_FLAGS_VLAN 0x00000002
2694 #define E1000_TX_FLAGS_TSO 0x00000004
2695 #define E1000_TX_FLAGS_IPV4 0x00000008
2696 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2697 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2698 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2700 static int e1000_tso(struct e1000_adapter *adapter,
2701 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2704 struct e1000_context_desc *context_desc;
2705 struct e1000_tx_buffer *buffer_info;
2708 u16 ipcse = 0, tucse, mss;
2709 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2711 if (skb_is_gso(skb)) {
2714 err = skb_cow_head(skb, 0);
2718 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2719 mss = skb_shinfo(skb)->gso_size;
2720 if (protocol == htons(ETH_P_IP)) {
2721 struct iphdr *iph = ip_hdr(skb);
2724 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2728 cmd_length = E1000_TXD_CMD_IP;
2729 ipcse = skb_transport_offset(skb) - 1;
2730 } else if (skb_is_gso_v6(skb)) {
2731 ipv6_hdr(skb)->payload_len = 0;
2732 tcp_hdr(skb)->check =
2733 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2734 &ipv6_hdr(skb)->daddr,
2738 ipcss = skb_network_offset(skb);
2739 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2740 tucss = skb_transport_offset(skb);
2741 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2744 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2745 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2747 i = tx_ring->next_to_use;
2748 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2749 buffer_info = &tx_ring->buffer_info[i];
2751 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2752 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2753 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2754 context_desc->upper_setup.tcp_fields.tucss = tucss;
2755 context_desc->upper_setup.tcp_fields.tucso = tucso;
2756 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2757 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2758 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2759 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2761 buffer_info->time_stamp = jiffies;
2762 buffer_info->next_to_watch = i;
2764 if (++i == tx_ring->count) i = 0;
2765 tx_ring->next_to_use = i;
2772 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2773 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2776 struct e1000_context_desc *context_desc;
2777 struct e1000_tx_buffer *buffer_info;
2780 u32 cmd_len = E1000_TXD_CMD_DEXT;
2782 if (skb->ip_summed != CHECKSUM_PARTIAL)
2786 case cpu_to_be16(ETH_P_IP):
2787 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2788 cmd_len |= E1000_TXD_CMD_TCP;
2790 case cpu_to_be16(ETH_P_IPV6):
2791 /* XXX not handling all IPV6 headers */
2792 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2793 cmd_len |= E1000_TXD_CMD_TCP;
2796 if (unlikely(net_ratelimit()))
2797 e_warn(drv, "checksum_partial proto=%x!\n",
2802 css = skb_checksum_start_offset(skb);
2804 i = tx_ring->next_to_use;
2805 buffer_info = &tx_ring->buffer_info[i];
2806 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2808 context_desc->lower_setup.ip_config = 0;
2809 context_desc->upper_setup.tcp_fields.tucss = css;
2810 context_desc->upper_setup.tcp_fields.tucso =
2811 css + skb->csum_offset;
2812 context_desc->upper_setup.tcp_fields.tucse = 0;
2813 context_desc->tcp_seg_setup.data = 0;
2814 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2816 buffer_info->time_stamp = jiffies;
2817 buffer_info->next_to_watch = i;
2819 if (unlikely(++i == tx_ring->count)) i = 0;
2820 tx_ring->next_to_use = i;
2825 #define E1000_MAX_TXD_PWR 12
2826 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2828 static int e1000_tx_map(struct e1000_adapter *adapter,
2829 struct e1000_tx_ring *tx_ring,
2830 struct sk_buff *skb, unsigned int first,
2831 unsigned int max_per_txd, unsigned int nr_frags,
2834 struct e1000_hw *hw = &adapter->hw;
2835 struct pci_dev *pdev = adapter->pdev;
2836 struct e1000_tx_buffer *buffer_info;
2837 unsigned int len = skb_headlen(skb);
2838 unsigned int offset = 0, size, count = 0, i;
2839 unsigned int f, bytecount, segs;
2841 i = tx_ring->next_to_use;
2844 buffer_info = &tx_ring->buffer_info[i];
2845 size = min(len, max_per_txd);
2846 /* Workaround for Controller erratum --
2847 * descriptor for non-tso packet in a linear SKB that follows a
2848 * tso gets written back prematurely before the data is fully
2849 * DMA'd to the controller
2851 if (!skb->data_len && tx_ring->last_tx_tso &&
2853 tx_ring->last_tx_tso = false;
2857 /* Workaround for premature desc write-backs
2858 * in TSO mode. Append 4-byte sentinel desc
2860 if (unlikely(mss && !nr_frags && size == len && size > 8))
2862 /* work-around for errata 10 and it applies
2863 * to all controllers in PCI-X mode
2864 * The fix is to make sure that the first descriptor of a
2865 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2867 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2868 (size > 2015) && count == 0))
2871 /* Workaround for potential 82544 hang in PCI-X. Avoid
2872 * terminating buffers within evenly-aligned dwords.
2874 if (unlikely(adapter->pcix_82544 &&
2875 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2879 buffer_info->length = size;
2880 /* set time_stamp *before* dma to help avoid a possible race */
2881 buffer_info->time_stamp = jiffies;
2882 buffer_info->mapped_as_page = false;
2883 buffer_info->dma = dma_map_single(&pdev->dev,
2885 size, DMA_TO_DEVICE);
2886 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2888 buffer_info->next_to_watch = i;
2895 if (unlikely(i == tx_ring->count))
2900 for (f = 0; f < nr_frags; f++) {
2901 const struct skb_frag_struct *frag;
2903 frag = &skb_shinfo(skb)->frags[f];
2904 len = skb_frag_size(frag);
2908 unsigned long bufend;
2910 if (unlikely(i == tx_ring->count))
2913 buffer_info = &tx_ring->buffer_info[i];
2914 size = min(len, max_per_txd);
2915 /* Workaround for premature desc write-backs
2916 * in TSO mode. Append 4-byte sentinel desc
2918 if (unlikely(mss && f == (nr_frags-1) &&
2919 size == len && size > 8))
2921 /* Workaround for potential 82544 hang in PCI-X.
2922 * Avoid terminating buffers within evenly-aligned
2925 bufend = (unsigned long)
2926 page_to_phys(skb_frag_page(frag));
2927 bufend += offset + size - 1;
2928 if (unlikely(adapter->pcix_82544 &&
2933 buffer_info->length = size;
2934 buffer_info->time_stamp = jiffies;
2935 buffer_info->mapped_as_page = true;
2936 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2937 offset, size, DMA_TO_DEVICE);
2938 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2940 buffer_info->next_to_watch = i;
2948 segs = skb_shinfo(skb)->gso_segs ?: 1;
2949 /* multiply data chunks by size of headers */
2950 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2952 tx_ring->buffer_info[i].skb = skb;
2953 tx_ring->buffer_info[i].segs = segs;
2954 tx_ring->buffer_info[i].bytecount = bytecount;
2955 tx_ring->buffer_info[first].next_to_watch = i;
2960 dev_err(&pdev->dev, "TX DMA map failed\n");
2961 buffer_info->dma = 0;
2967 i += tx_ring->count;
2969 buffer_info = &tx_ring->buffer_info[i];
2970 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2976 static void e1000_tx_queue(struct e1000_adapter *adapter,
2977 struct e1000_tx_ring *tx_ring, int tx_flags,
2980 struct e1000_tx_desc *tx_desc = NULL;
2981 struct e1000_tx_buffer *buffer_info;
2982 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2985 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2986 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2988 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2990 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2991 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2994 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2995 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2996 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2999 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3000 txd_lower |= E1000_TXD_CMD_VLE;
3001 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3004 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3005 txd_lower &= ~(E1000_TXD_CMD_IFCS);
3007 i = tx_ring->next_to_use;
3010 buffer_info = &tx_ring->buffer_info[i];
3011 tx_desc = E1000_TX_DESC(*tx_ring, i);
3012 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3013 tx_desc->lower.data =
3014 cpu_to_le32(txd_lower | buffer_info->length);
3015 tx_desc->upper.data = cpu_to_le32(txd_upper);
3016 if (unlikely(++i == tx_ring->count)) i = 0;
3019 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3021 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3022 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3023 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3025 /* Force memory writes to complete before letting h/w
3026 * know there are new descriptors to fetch. (Only
3027 * applicable for weak-ordered memory model archs,
3032 tx_ring->next_to_use = i;
3035 /* 82547 workaround to avoid controller hang in half-duplex environment.
3036 * The workaround is to avoid queuing a large packet that would span
3037 * the internal Tx FIFO ring boundary by notifying the stack to resend
3038 * the packet at a later time. This gives the Tx FIFO an opportunity to
3039 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3040 * to the beginning of the Tx FIFO.
3043 #define E1000_FIFO_HDR 0x10
3044 #define E1000_82547_PAD_LEN 0x3E0
3046 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3047 struct sk_buff *skb)
3049 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3050 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3052 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3054 if (adapter->link_duplex != HALF_DUPLEX)
3055 goto no_fifo_stall_required;
3057 if (atomic_read(&adapter->tx_fifo_stall))
3060 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3061 atomic_set(&adapter->tx_fifo_stall, 1);
3065 no_fifo_stall_required:
3066 adapter->tx_fifo_head += skb_fifo_len;
3067 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3068 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3072 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3074 struct e1000_adapter *adapter = netdev_priv(netdev);
3075 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3077 netif_stop_queue(netdev);
3078 /* Herbert's original patch had:
3079 * smp_mb__after_netif_stop_queue();
3080 * but since that doesn't exist yet, just open code it.
3084 /* We need to check again in a case another CPU has just
3085 * made room available.
3087 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3091 netif_start_queue(netdev);
3092 ++adapter->restart_queue;
3096 static int e1000_maybe_stop_tx(struct net_device *netdev,
3097 struct e1000_tx_ring *tx_ring, int size)
3099 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3101 return __e1000_maybe_stop_tx(netdev, size);
3104 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3105 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3106 struct net_device *netdev)
3108 struct e1000_adapter *adapter = netdev_priv(netdev);
3109 struct e1000_hw *hw = &adapter->hw;
3110 struct e1000_tx_ring *tx_ring;
3111 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3112 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3113 unsigned int tx_flags = 0;
3114 unsigned int len = skb_headlen(skb);
3115 unsigned int nr_frags;
3120 __be16 protocol = vlan_get_protocol(skb);
3122 /* This goes back to the question of how to logically map a Tx queue
3123 * to a flow. Right now, performance is impacted slightly negatively
3124 * if using multiple Tx queues. If the stack breaks away from a
3125 * single qdisc implementation, we can look at this again.
3127 tx_ring = adapter->tx_ring;
3129 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3130 * packets may get corrupted during padding by HW.
3131 * To WA this issue, pad all small packets manually.
3133 if (eth_skb_pad(skb))
3134 return NETDEV_TX_OK;
3136 mss = skb_shinfo(skb)->gso_size;
3137 /* The controller does a simple calculation to
3138 * make sure there is enough room in the FIFO before
3139 * initiating the DMA for each buffer. The calc is:
3140 * 4 = ceil(buffer len/mss). To make sure we don't
3141 * overrun the FIFO, adjust the max buffer len if mss
3146 max_per_txd = min(mss << 2, max_per_txd);
3147 max_txd_pwr = fls(max_per_txd) - 1;
3149 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3150 if (skb->data_len && hdr_len == len) {
3151 switch (hw->mac_type) {
3152 unsigned int pull_size;
3154 /* Make sure we have room to chop off 4 bytes,
3155 * and that the end alignment will work out to
3156 * this hardware's requirements
3157 * NOTE: this is a TSO only workaround
3158 * if end byte alignment not correct move us
3159 * into the next dword
3161 if ((unsigned long)(skb_tail_pointer(skb) - 1)
3165 pull_size = min((unsigned int)4, skb->data_len);
3166 if (!__pskb_pull_tail(skb, pull_size)) {
3167 e_err(drv, "__pskb_pull_tail "
3169 dev_kfree_skb_any(skb);
3170 return NETDEV_TX_OK;
3172 len = skb_headlen(skb);
3181 /* reserve a descriptor for the offload context */
3182 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3186 /* Controller Erratum workaround */
3187 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3190 count += TXD_USE_COUNT(len, max_txd_pwr);
3192 if (adapter->pcix_82544)
3195 /* work-around for errata 10 and it applies to all controllers
3196 * in PCI-X mode, so add one more descriptor to the count
3198 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3202 nr_frags = skb_shinfo(skb)->nr_frags;
3203 for (f = 0; f < nr_frags; f++)
3204 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3206 if (adapter->pcix_82544)
3209 /* need: count + 2 desc gap to keep tail from touching
3210 * head, otherwise try next time
3212 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3213 return NETDEV_TX_BUSY;
3215 if (unlikely((hw->mac_type == e1000_82547) &&
3216 (e1000_82547_fifo_workaround(adapter, skb)))) {
3217 netif_stop_queue(netdev);
3218 if (!test_bit(__E1000_DOWN, &adapter->flags))
3219 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3220 return NETDEV_TX_BUSY;
3223 if (skb_vlan_tag_present(skb)) {
3224 tx_flags |= E1000_TX_FLAGS_VLAN;
3225 tx_flags |= (skb_vlan_tag_get(skb) <<
3226 E1000_TX_FLAGS_VLAN_SHIFT);
3229 first = tx_ring->next_to_use;
3231 tso = e1000_tso(adapter, tx_ring, skb, protocol);
3233 dev_kfree_skb_any(skb);
3234 return NETDEV_TX_OK;
3238 if (likely(hw->mac_type != e1000_82544))
3239 tx_ring->last_tx_tso = true;
3240 tx_flags |= E1000_TX_FLAGS_TSO;
3241 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb, protocol)))
3242 tx_flags |= E1000_TX_FLAGS_CSUM;
3244 if (protocol == htons(ETH_P_IP))
3245 tx_flags |= E1000_TX_FLAGS_IPV4;
3247 if (unlikely(skb->no_fcs))
3248 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3250 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3254 netdev_sent_queue(netdev, skb->len);
3255 skb_tx_timestamp(skb);
3257 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3258 /* Make sure there is space in the ring for the next send. */
3259 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3261 if (!skb->xmit_more ||
3262 netif_xmit_stopped(netdev_get_tx_queue(netdev, 0))) {
3263 writel(tx_ring->next_to_use, hw->hw_addr + tx_ring->tdt);
3264 /* we need this if more than one processor can write to
3265 * our tail at a time, it synchronizes IO on IA64/Altix
3271 dev_kfree_skb_any(skb);
3272 tx_ring->buffer_info[first].time_stamp = 0;
3273 tx_ring->next_to_use = first;
3276 return NETDEV_TX_OK;
3279 #define NUM_REGS 38 /* 1 based count */
3280 static void e1000_regdump(struct e1000_adapter *adapter)
3282 struct e1000_hw *hw = &adapter->hw;
3284 u32 *regs_buff = regs;
3287 static const char * const reg_name[] = {
3289 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3290 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3291 "TIDV", "TXDCTL", "TADV", "TARC0",
3292 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3294 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3295 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3296 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3299 regs_buff[0] = er32(CTRL);
3300 regs_buff[1] = er32(STATUS);
3302 regs_buff[2] = er32(RCTL);
3303 regs_buff[3] = er32(RDLEN);
3304 regs_buff[4] = er32(RDH);
3305 regs_buff[5] = er32(RDT);
3306 regs_buff[6] = er32(RDTR);
3308 regs_buff[7] = er32(TCTL);
3309 regs_buff[8] = er32(TDBAL);
3310 regs_buff[9] = er32(TDBAH);
3311 regs_buff[10] = er32(TDLEN);
3312 regs_buff[11] = er32(TDH);
3313 regs_buff[12] = er32(TDT);
3314 regs_buff[13] = er32(TIDV);
3315 regs_buff[14] = er32(TXDCTL);
3316 regs_buff[15] = er32(TADV);
3317 regs_buff[16] = er32(TARC0);
3319 regs_buff[17] = er32(TDBAL1);
3320 regs_buff[18] = er32(TDBAH1);
3321 regs_buff[19] = er32(TDLEN1);
3322 regs_buff[20] = er32(TDH1);
3323 regs_buff[21] = er32(TDT1);
3324 regs_buff[22] = er32(TXDCTL1);
3325 regs_buff[23] = er32(TARC1);
3326 regs_buff[24] = er32(CTRL_EXT);
3327 regs_buff[25] = er32(ERT);
3328 regs_buff[26] = er32(RDBAL0);
3329 regs_buff[27] = er32(RDBAH0);
3330 regs_buff[28] = er32(TDFH);
3331 regs_buff[29] = er32(TDFT);
3332 regs_buff[30] = er32(TDFHS);
3333 regs_buff[31] = er32(TDFTS);
3334 regs_buff[32] = er32(TDFPC);
3335 regs_buff[33] = er32(RDFH);
3336 regs_buff[34] = er32(RDFT);
3337 regs_buff[35] = er32(RDFHS);
3338 regs_buff[36] = er32(RDFTS);
3339 regs_buff[37] = er32(RDFPC);
3341 pr_info("Register dump\n");
3342 for (i = 0; i < NUM_REGS; i++)
3343 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3347 * e1000_dump: Print registers, tx ring and rx ring
3349 static void e1000_dump(struct e1000_adapter *adapter)
3351 /* this code doesn't handle multiple rings */
3352 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3353 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3356 if (!netif_msg_hw(adapter))
3359 /* Print Registers */
3360 e1000_regdump(adapter);
3363 pr_info("TX Desc ring0 dump\n");
3365 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3367 * Legacy Transmit Descriptor
3368 * +--------------------------------------------------------------+
3369 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3370 * +--------------------------------------------------------------+
3371 * 8 | Special | CSS | Status | CMD | CSO | Length |
3372 * +--------------------------------------------------------------+
3373 * 63 48 47 36 35 32 31 24 23 16 15 0
3375 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3376 * 63 48 47 40 39 32 31 16 15 8 7 0
3377 * +----------------------------------------------------------------+
3378 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3379 * +----------------------------------------------------------------+
3380 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3381 * +----------------------------------------------------------------+
3382 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3384 * Extended Data Descriptor (DTYP=0x1)
3385 * +----------------------------------------------------------------+
3386 * 0 | Buffer Address [63:0] |
3387 * +----------------------------------------------------------------+
3388 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3389 * +----------------------------------------------------------------+
3390 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3392 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3393 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3395 if (!netif_msg_tx_done(adapter))
3396 goto rx_ring_summary;
3398 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3399 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3400 struct e1000_tx_buffer *buffer_info = &tx_ring->buffer_info[i];
3401 struct my_u { __le64 a; __le64 b; };
3402 struct my_u *u = (struct my_u *)tx_desc;
3405 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3407 else if (i == tx_ring->next_to_use)
3409 else if (i == tx_ring->next_to_clean)
3414 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3415 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3416 le64_to_cpu(u->a), le64_to_cpu(u->b),
3417 (u64)buffer_info->dma, buffer_info->length,
3418 buffer_info->next_to_watch,
3419 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3424 pr_info("\nRX Desc ring dump\n");
3426 /* Legacy Receive Descriptor Format
3428 * +-----------------------------------------------------+
3429 * | Buffer Address [63:0] |
3430 * +-----------------------------------------------------+
3431 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3432 * +-----------------------------------------------------+
3433 * 63 48 47 40 39 32 31 16 15 0
3435 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3437 if (!netif_msg_rx_status(adapter))
3440 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3441 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3442 struct e1000_rx_buffer *buffer_info = &rx_ring->buffer_info[i];
3443 struct my_u { __le64 a; __le64 b; };
3444 struct my_u *u = (struct my_u *)rx_desc;
3447 if (i == rx_ring->next_to_use)
3449 else if (i == rx_ring->next_to_clean)
3454 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3455 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3456 (u64)buffer_info->dma, buffer_info->rxbuf.data, type);
3459 /* dump the descriptor caches */
3461 pr_info("Rx descriptor cache in 64bit format\n");
3462 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3463 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3465 readl(adapter->hw.hw_addr + i+4),
3466 readl(adapter->hw.hw_addr + i),
3467 readl(adapter->hw.hw_addr + i+12),
3468 readl(adapter->hw.hw_addr + i+8));
3471 pr_info("Tx descriptor cache in 64bit format\n");
3472 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3473 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3475 readl(adapter->hw.hw_addr + i+4),
3476 readl(adapter->hw.hw_addr + i),
3477 readl(adapter->hw.hw_addr + i+12),
3478 readl(adapter->hw.hw_addr + i+8));
3485 * e1000_tx_timeout - Respond to a Tx Hang
3486 * @netdev: network interface device structure
3488 static void e1000_tx_timeout(struct net_device *netdev)
3490 struct e1000_adapter *adapter = netdev_priv(netdev);
3492 /* Do the reset outside of interrupt context */
3493 adapter->tx_timeout_count++;
3494 schedule_work(&adapter->reset_task);
3497 static void e1000_reset_task(struct work_struct *work)
3499 struct e1000_adapter *adapter =
3500 container_of(work, struct e1000_adapter, reset_task);
3502 e_err(drv, "Reset adapter\n");
3503 e1000_reinit_locked(adapter);
3507 * e1000_get_stats - Get System Network Statistics
3508 * @netdev: network interface device structure
3510 * Returns the address of the device statistics structure.
3511 * The statistics are actually updated from the watchdog.
3513 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3515 /* only return the current stats */
3516 return &netdev->stats;
3520 * e1000_change_mtu - Change the Maximum Transfer Unit
3521 * @netdev: network interface device structure
3522 * @new_mtu: new value for maximum frame size
3524 * Returns 0 on success, negative on failure
3526 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3528 struct e1000_adapter *adapter = netdev_priv(netdev);
3529 struct e1000_hw *hw = &adapter->hw;
3530 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3532 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3533 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3534 e_err(probe, "Invalid MTU setting\n");
3538 /* Adapter-specific max frame size limits. */
3539 switch (hw->mac_type) {
3540 case e1000_undefined ... e1000_82542_rev2_1:
3541 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3542 e_err(probe, "Jumbo Frames not supported.\n");
3547 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3551 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3553 /* e1000_down has a dependency on max_frame_size */
3554 hw->max_frame_size = max_frame;
3555 if (netif_running(netdev))
3556 e1000_down(adapter);
3558 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3559 * means we reserve 2 more, this pushes us to allocate from the next
3561 * i.e. RXBUFFER_2048 --> size-4096 slab
3562 * however with the new *_jumbo_rx* routines, jumbo receives will use
3566 if (max_frame <= E1000_RXBUFFER_2048)
3567 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3569 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3570 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3571 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3572 adapter->rx_buffer_len = PAGE_SIZE;
3575 /* adjust allocation if LPE protects us, and we aren't using SBP */
3576 if (!hw->tbi_compatibility_on &&
3577 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3578 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3579 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3581 pr_info("%s changing MTU from %d to %d\n",
3582 netdev->name, netdev->mtu, new_mtu);
3583 netdev->mtu = new_mtu;
3585 if (netif_running(netdev))
3588 e1000_reset(adapter);
3590 clear_bit(__E1000_RESETTING, &adapter->flags);
3596 * e1000_update_stats - Update the board statistics counters
3597 * @adapter: board private structure
3599 void e1000_update_stats(struct e1000_adapter *adapter)
3601 struct net_device *netdev = adapter->netdev;
3602 struct e1000_hw *hw = &adapter->hw;
3603 struct pci_dev *pdev = adapter->pdev;
3604 unsigned long flags;
3607 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3609 /* Prevent stats update while adapter is being reset, or if the pci
3610 * connection is down.
3612 if (adapter->link_speed == 0)
3614 if (pci_channel_offline(pdev))
3617 spin_lock_irqsave(&adapter->stats_lock, flags);
3619 /* these counters are modified from e1000_tbi_adjust_stats,
3620 * called from the interrupt context, so they must only
3621 * be written while holding adapter->stats_lock
3624 adapter->stats.crcerrs += er32(CRCERRS);
3625 adapter->stats.gprc += er32(GPRC);
3626 adapter->stats.gorcl += er32(GORCL);
3627 adapter->stats.gorch += er32(GORCH);
3628 adapter->stats.bprc += er32(BPRC);
3629 adapter->stats.mprc += er32(MPRC);
3630 adapter->stats.roc += er32(ROC);
3632 adapter->stats.prc64 += er32(PRC64);
3633 adapter->stats.prc127 += er32(PRC127);
3634 adapter->stats.prc255 += er32(PRC255);
3635 adapter->stats.prc511 += er32(PRC511);
3636 adapter->stats.prc1023 += er32(PRC1023);
3637 adapter->stats.prc1522 += er32(PRC1522);
3639 adapter->stats.symerrs += er32(SYMERRS);
3640 adapter->stats.mpc += er32(MPC);
3641 adapter->stats.scc += er32(SCC);
3642 adapter->stats.ecol += er32(ECOL);
3643 adapter->stats.mcc += er32(MCC);
3644 adapter->stats.latecol += er32(LATECOL);
3645 adapter->stats.dc += er32(DC);
3646 adapter->stats.sec += er32(SEC);
3647 adapter->stats.rlec += er32(RLEC);
3648 adapter->stats.xonrxc += er32(XONRXC);
3649 adapter->stats.xontxc += er32(XONTXC);
3650 adapter->stats.xoffrxc += er32(XOFFRXC);
3651 adapter->stats.xofftxc += er32(XOFFTXC);
3652 adapter->stats.fcruc += er32(FCRUC);
3653 adapter->stats.gptc += er32(GPTC);
3654 adapter->stats.gotcl += er32(GOTCL);
3655 adapter->stats.gotch += er32(GOTCH);
3656 adapter->stats.rnbc += er32(RNBC);
3657 adapter->stats.ruc += er32(RUC);
3658 adapter->stats.rfc += er32(RFC);
3659 adapter->stats.rjc += er32(RJC);
3660 adapter->stats.torl += er32(TORL);
3661 adapter->stats.torh += er32(TORH);
3662 adapter->stats.totl += er32(TOTL);
3663 adapter->stats.toth += er32(TOTH);
3664 adapter->stats.tpr += er32(TPR);
3666 adapter->stats.ptc64 += er32(PTC64);
3667 adapter->stats.ptc127 += er32(PTC127);
3668 adapter->stats.ptc255 += er32(PTC255);
3669 adapter->stats.ptc511 += er32(PTC511);
3670 adapter->stats.ptc1023 += er32(PTC1023);
3671 adapter->stats.ptc1522 += er32(PTC1522);
3673 adapter->stats.mptc += er32(MPTC);
3674 adapter->stats.bptc += er32(BPTC);
3676 /* used for adaptive IFS */
3678 hw->tx_packet_delta = er32(TPT);
3679 adapter->stats.tpt += hw->tx_packet_delta;
3680 hw->collision_delta = er32(COLC);
3681 adapter->stats.colc += hw->collision_delta;
3683 if (hw->mac_type >= e1000_82543) {
3684 adapter->stats.algnerrc += er32(ALGNERRC);
3685 adapter->stats.rxerrc += er32(RXERRC);
3686 adapter->stats.tncrs += er32(TNCRS);
3687 adapter->stats.cexterr += er32(CEXTERR);
3688 adapter->stats.tsctc += er32(TSCTC);
3689 adapter->stats.tsctfc += er32(TSCTFC);
3692 /* Fill out the OS statistics structure */
3693 netdev->stats.multicast = adapter->stats.mprc;
3694 netdev->stats.collisions = adapter->stats.colc;
3698 /* RLEC on some newer hardware can be incorrect so build
3699 * our own version based on RUC and ROC
3701 netdev->stats.rx_errors = adapter->stats.rxerrc +
3702 adapter->stats.crcerrs + adapter->stats.algnerrc +
3703 adapter->stats.ruc + adapter->stats.roc +
3704 adapter->stats.cexterr;
3705 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3706 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3707 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3708 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3709 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3712 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3713 netdev->stats.tx_errors = adapter->stats.txerrc;
3714 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3715 netdev->stats.tx_window_errors = adapter->stats.latecol;
3716 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3717 if (hw->bad_tx_carr_stats_fd &&
3718 adapter->link_duplex == FULL_DUPLEX) {
3719 netdev->stats.tx_carrier_errors = 0;
3720 adapter->stats.tncrs = 0;
3723 /* Tx Dropped needs to be maintained elsewhere */
3726 if (hw->media_type == e1000_media_type_copper) {
3727 if ((adapter->link_speed == SPEED_1000) &&
3728 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3729 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3730 adapter->phy_stats.idle_errors += phy_tmp;
3733 if ((hw->mac_type <= e1000_82546) &&
3734 (hw->phy_type == e1000_phy_m88) &&
3735 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3736 adapter->phy_stats.receive_errors += phy_tmp;
3739 /* Management Stats */
3740 if (hw->has_smbus) {
3741 adapter->stats.mgptc += er32(MGTPTC);
3742 adapter->stats.mgprc += er32(MGTPRC);
3743 adapter->stats.mgpdc += er32(MGTPDC);
3746 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3750 * e1000_intr - Interrupt Handler
3751 * @irq: interrupt number
3752 * @data: pointer to a network interface device structure
3754 static irqreturn_t e1000_intr(int irq, void *data)
3756 struct net_device *netdev = data;
3757 struct e1000_adapter *adapter = netdev_priv(netdev);
3758 struct e1000_hw *hw = &adapter->hw;
3759 u32 icr = er32(ICR);
3761 if (unlikely((!icr)))
3762 return IRQ_NONE; /* Not our interrupt */
3764 /* we might have caused the interrupt, but the above
3765 * read cleared it, and just in case the driver is
3766 * down there is nothing to do so return handled
3768 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3771 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3772 hw->get_link_status = 1;
3773 /* guard against interrupt when we're going down */
3774 if (!test_bit(__E1000_DOWN, &adapter->flags))
3775 schedule_delayed_work(&adapter->watchdog_task, 1);
3778 /* disable interrupts, without the synchronize_irq bit */
3780 E1000_WRITE_FLUSH();
3782 if (likely(napi_schedule_prep(&adapter->napi))) {
3783 adapter->total_tx_bytes = 0;
3784 adapter->total_tx_packets = 0;
3785 adapter->total_rx_bytes = 0;
3786 adapter->total_rx_packets = 0;
3787 __napi_schedule(&adapter->napi);
3789 /* this really should not happen! if it does it is basically a
3790 * bug, but not a hard error, so enable ints and continue
3792 if (!test_bit(__E1000_DOWN, &adapter->flags))
3793 e1000_irq_enable(adapter);
3800 * e1000_clean - NAPI Rx polling callback
3801 * @adapter: board private structure
3803 static int e1000_clean(struct napi_struct *napi, int budget)
3805 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
3807 int tx_clean_complete = 0, work_done = 0;
3809 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3811 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3813 if (!tx_clean_complete)
3816 /* If budget not fully consumed, exit the polling mode */
3817 if (work_done < budget) {
3818 if (likely(adapter->itr_setting & 3))
3819 e1000_set_itr(adapter);
3820 napi_complete(napi);
3821 if (!test_bit(__E1000_DOWN, &adapter->flags))
3822 e1000_irq_enable(adapter);
3829 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3830 * @adapter: board private structure
3832 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3833 struct e1000_tx_ring *tx_ring)
3835 struct e1000_hw *hw = &adapter->hw;
3836 struct net_device *netdev = adapter->netdev;
3837 struct e1000_tx_desc *tx_desc, *eop_desc;
3838 struct e1000_tx_buffer *buffer_info;
3839 unsigned int i, eop;
3840 unsigned int count = 0;
3841 unsigned int total_tx_bytes=0, total_tx_packets=0;
3842 unsigned int bytes_compl = 0, pkts_compl = 0;
3844 i = tx_ring->next_to_clean;
3845 eop = tx_ring->buffer_info[i].next_to_watch;
3846 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3848 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3849 (count < tx_ring->count)) {
3850 bool cleaned = false;
3851 rmb(); /* read buffer_info after eop_desc */
3852 for ( ; !cleaned; count++) {
3853 tx_desc = E1000_TX_DESC(*tx_ring, i);
3854 buffer_info = &tx_ring->buffer_info[i];
3855 cleaned = (i == eop);
3858 total_tx_packets += buffer_info->segs;
3859 total_tx_bytes += buffer_info->bytecount;
3860 if (buffer_info->skb) {
3861 bytes_compl += buffer_info->skb->len;
3866 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3867 tx_desc->upper.data = 0;
3869 if (unlikely(++i == tx_ring->count)) i = 0;
3872 eop = tx_ring->buffer_info[i].next_to_watch;
3873 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3876 tx_ring->next_to_clean = i;
3878 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
3880 #define TX_WAKE_THRESHOLD 32
3881 if (unlikely(count && netif_carrier_ok(netdev) &&
3882 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3883 /* Make sure that anybody stopping the queue after this
3884 * sees the new next_to_clean.
3888 if (netif_queue_stopped(netdev) &&
3889 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3890 netif_wake_queue(netdev);
3891 ++adapter->restart_queue;
3895 if (adapter->detect_tx_hung) {
3896 /* Detect a transmit hang in hardware, this serializes the
3897 * check with the clearing of time_stamp and movement of i
3899 adapter->detect_tx_hung = false;
3900 if (tx_ring->buffer_info[eop].time_stamp &&
3901 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3902 (adapter->tx_timeout_factor * HZ)) &&
3903 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3905 /* detected Tx unit hang */
3906 e_err(drv, "Detected Tx Unit Hang\n"
3910 " next_to_use <%x>\n"
3911 " next_to_clean <%x>\n"
3912 "buffer_info[next_to_clean]\n"
3913 " time_stamp <%lx>\n"
3914 " next_to_watch <%x>\n"
3916 " next_to_watch.status <%x>\n",
3917 (unsigned long)(tx_ring - adapter->tx_ring),
3918 readl(hw->hw_addr + tx_ring->tdh),
3919 readl(hw->hw_addr + tx_ring->tdt),
3920 tx_ring->next_to_use,
3921 tx_ring->next_to_clean,
3922 tx_ring->buffer_info[eop].time_stamp,
3925 eop_desc->upper.fields.status);
3926 e1000_dump(adapter);
3927 netif_stop_queue(netdev);
3930 adapter->total_tx_bytes += total_tx_bytes;
3931 adapter->total_tx_packets += total_tx_packets;
3932 netdev->stats.tx_bytes += total_tx_bytes;
3933 netdev->stats.tx_packets += total_tx_packets;
3934 return count < tx_ring->count;
3938 * e1000_rx_checksum - Receive Checksum Offload for 82543
3939 * @adapter: board private structure
3940 * @status_err: receive descriptor status and error fields
3941 * @csum: receive descriptor csum field
3942 * @sk_buff: socket buffer with received data
3944 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3945 u32 csum, struct sk_buff *skb)
3947 struct e1000_hw *hw = &adapter->hw;
3948 u16 status = (u16)status_err;
3949 u8 errors = (u8)(status_err >> 24);
3951 skb_checksum_none_assert(skb);
3953 /* 82543 or newer only */
3954 if (unlikely(hw->mac_type < e1000_82543)) return;
3955 /* Ignore Checksum bit is set */
3956 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3957 /* TCP/UDP checksum error bit is set */
3958 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3959 /* let the stack verify checksum errors */
3960 adapter->hw_csum_err++;
3963 /* TCP/UDP Checksum has not been calculated */
3964 if (!(status & E1000_RXD_STAT_TCPCS))
3967 /* It must be a TCP or UDP packet with a valid checksum */
3968 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3969 /* TCP checksum is good */
3970 skb->ip_summed = CHECKSUM_UNNECESSARY;
3972 adapter->hw_csum_good++;
3976 * e1000_consume_page - helper function for jumbo Rx path
3978 static void e1000_consume_page(struct e1000_rx_buffer *bi, struct sk_buff *skb,
3981 bi->rxbuf.page = NULL;
3983 skb->data_len += length;
3984 skb->truesize += PAGE_SIZE;
3988 * e1000_receive_skb - helper function to handle rx indications
3989 * @adapter: board private structure
3990 * @status: descriptor status field as written by hardware
3991 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3992 * @skb: pointer to sk_buff to be indicated to stack
3994 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3995 __le16 vlan, struct sk_buff *skb)
3997 skb->protocol = eth_type_trans(skb, adapter->netdev);
3999 if (status & E1000_RXD_STAT_VP) {
4000 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4002 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4004 napi_gro_receive(&adapter->napi, skb);
4008 * e1000_tbi_adjust_stats
4009 * @hw: Struct containing variables accessed by shared code
4010 * @frame_len: The length of the frame in question
4011 * @mac_addr: The Ethernet destination address of the frame in question
4013 * Adjusts the statistic counters when a frame is accepted by TBI_ACCEPT
4015 static void e1000_tbi_adjust_stats(struct e1000_hw *hw,
4016 struct e1000_hw_stats *stats,
4017 u32 frame_len, const u8 *mac_addr)
4021 /* First adjust the frame length. */
4023 /* We need to adjust the statistics counters, since the hardware
4024 * counters overcount this packet as a CRC error and undercount
4025 * the packet as a good packet
4027 /* This packet should not be counted as a CRC error. */
4029 /* This packet does count as a Good Packet Received. */
4032 /* Adjust the Good Octets received counters */
4033 carry_bit = 0x80000000 & stats->gorcl;
4034 stats->gorcl += frame_len;
4035 /* If the high bit of Gorcl (the low 32 bits of the Good Octets
4036 * Received Count) was one before the addition,
4037 * AND it is zero after, then we lost the carry out,
4038 * need to add one to Gorch (Good Octets Received Count High).
4039 * This could be simplified if all environments supported
4042 if (carry_bit && ((stats->gorcl & 0x80000000) == 0))
4044 /* Is this a broadcast or multicast? Check broadcast first,
4045 * since the test for a multicast frame will test positive on
4046 * a broadcast frame.
4048 if (is_broadcast_ether_addr(mac_addr))
4050 else if (is_multicast_ether_addr(mac_addr))
4053 if (frame_len == hw->max_frame_size) {
4054 /* In this case, the hardware has overcounted the number of
4061 /* Adjust the bin counters when the extra byte put the frame in the
4062 * wrong bin. Remember that the frame_len was adjusted above.
4064 if (frame_len == 64) {
4067 } else if (frame_len == 127) {
4070 } else if (frame_len == 255) {
4073 } else if (frame_len == 511) {
4076 } else if (frame_len == 1023) {
4079 } else if (frame_len == 1522) {
4084 static bool e1000_tbi_should_accept(struct e1000_adapter *adapter,
4085 u8 status, u8 errors,
4086 u32 length, const u8 *data)
4088 struct e1000_hw *hw = &adapter->hw;
4089 u8 last_byte = *(data + length - 1);
4091 if (TBI_ACCEPT(hw, status, errors, length, last_byte)) {
4092 unsigned long irq_flags;
4094 spin_lock_irqsave(&adapter->stats_lock, irq_flags);
4095 e1000_tbi_adjust_stats(hw, &adapter->stats, length, data);
4096 spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
4104 static struct sk_buff *e1000_alloc_rx_skb(struct e1000_adapter *adapter,
4107 struct sk_buff *skb = napi_alloc_skb(&adapter->napi, bufsz);
4110 adapter->alloc_rx_buff_failed++;
4115 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4116 * @adapter: board private structure
4117 * @rx_ring: ring to clean
4118 * @work_done: amount of napi work completed this call
4119 * @work_to_do: max amount of work allowed for this call to do
4121 * the return value indicates whether actual cleaning was done, there
4122 * is no guarantee that everything was cleaned
4124 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
4125 struct e1000_rx_ring *rx_ring,
4126 int *work_done, int work_to_do)
4128 struct net_device *netdev = adapter->netdev;
4129 struct pci_dev *pdev = adapter->pdev;
4130 struct e1000_rx_desc *rx_desc, *next_rxd;
4131 struct e1000_rx_buffer *buffer_info, *next_buffer;
4134 int cleaned_count = 0;
4135 bool cleaned = false;
4136 unsigned int total_rx_bytes=0, total_rx_packets=0;
4138 i = rx_ring->next_to_clean;
4139 rx_desc = E1000_RX_DESC(*rx_ring, i);
4140 buffer_info = &rx_ring->buffer_info[i];
4142 while (rx_desc->status & E1000_RXD_STAT_DD) {
4143 struct sk_buff *skb;
4146 if (*work_done >= work_to_do)
4149 rmb(); /* read descriptor and rx_buffer_info after status DD */
4151 status = rx_desc->status;
4153 if (++i == rx_ring->count) i = 0;
4154 next_rxd = E1000_RX_DESC(*rx_ring, i);
4157 next_buffer = &rx_ring->buffer_info[i];
4161 dma_unmap_page(&pdev->dev, buffer_info->dma,
4162 adapter->rx_buffer_len, DMA_FROM_DEVICE);
4163 buffer_info->dma = 0;
4165 length = le16_to_cpu(rx_desc->length);
4167 /* errors is only valid for DD + EOP descriptors */
4168 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4169 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4170 u8 *mapped = page_address(buffer_info->rxbuf.page);
4172 if (e1000_tbi_should_accept(adapter, status,
4176 } else if (netdev->features & NETIF_F_RXALL) {
4179 /* an error means any chain goes out the window
4182 if (rx_ring->rx_skb_top)
4183 dev_kfree_skb(rx_ring->rx_skb_top);
4184 rx_ring->rx_skb_top = NULL;
4189 #define rxtop rx_ring->rx_skb_top
4191 if (!(status & E1000_RXD_STAT_EOP)) {
4192 /* this descriptor is only the beginning (or middle) */
4194 /* this is the beginning of a chain */
4195 rxtop = napi_get_frags(&adapter->napi);
4199 skb_fill_page_desc(rxtop, 0,
4200 buffer_info->rxbuf.page,
4203 /* this is the middle of a chain */
4204 skb_fill_page_desc(rxtop,
4205 skb_shinfo(rxtop)->nr_frags,
4206 buffer_info->rxbuf.page, 0, length);
4208 e1000_consume_page(buffer_info, rxtop, length);
4212 /* end of the chain */
4213 skb_fill_page_desc(rxtop,
4214 skb_shinfo(rxtop)->nr_frags,
4215 buffer_info->rxbuf.page, 0, length);
4218 e1000_consume_page(buffer_info, skb, length);
4221 /* no chain, got EOP, this buf is the packet
4222 * copybreak to save the put_page/alloc_page
4224 p = buffer_info->rxbuf.page;
4225 if (length <= copybreak) {
4228 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4230 skb = e1000_alloc_rx_skb(adapter,
4235 vaddr = kmap_atomic(p);
4236 memcpy(skb_tail_pointer(skb), vaddr,
4238 kunmap_atomic(vaddr);
4239 /* re-use the page, so don't erase
4240 * buffer_info->rxbuf.page
4242 skb_put(skb, length);
4243 e1000_rx_checksum(adapter,
4244 status | rx_desc->errors << 24,
4245 le16_to_cpu(rx_desc->csum), skb);
4247 total_rx_bytes += skb->len;
4250 e1000_receive_skb(adapter, status,
4251 rx_desc->special, skb);
4254 skb = napi_get_frags(&adapter->napi);
4256 adapter->alloc_rx_buff_failed++;
4259 skb_fill_page_desc(skb, 0, p, 0,
4261 e1000_consume_page(buffer_info, skb,
4267 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4268 e1000_rx_checksum(adapter,
4270 ((u32)(rx_desc->errors) << 24),
4271 le16_to_cpu(rx_desc->csum), skb);
4273 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4274 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4275 pskb_trim(skb, skb->len - 4);
4278 if (status & E1000_RXD_STAT_VP) {
4279 __le16 vlan = rx_desc->special;
4280 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4282 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4285 napi_gro_frags(&adapter->napi);
4288 rx_desc->status = 0;
4290 /* return some buffers to hardware, one at a time is too slow */
4291 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4292 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4296 /* use prefetched values */
4298 buffer_info = next_buffer;
4300 rx_ring->next_to_clean = i;
4302 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4304 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4306 adapter->total_rx_packets += total_rx_packets;
4307 adapter->total_rx_bytes += total_rx_bytes;
4308 netdev->stats.rx_bytes += total_rx_bytes;
4309 netdev->stats.rx_packets += total_rx_packets;
4313 /* this should improve performance for small packets with large amounts
4314 * of reassembly being done in the stack
4316 static struct sk_buff *e1000_copybreak(struct e1000_adapter *adapter,
4317 struct e1000_rx_buffer *buffer_info,
4318 u32 length, const void *data)
4320 struct sk_buff *skb;
4322 if (length > copybreak)
4325 skb = e1000_alloc_rx_skb(adapter, length);
4329 dma_sync_single_for_cpu(&adapter->pdev->dev, buffer_info->dma,
4330 length, DMA_FROM_DEVICE);
4332 memcpy(skb_put(skb, length), data, length);
4338 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4339 * @adapter: board private structure
4340 * @rx_ring: ring to clean
4341 * @work_done: amount of napi work completed this call
4342 * @work_to_do: max amount of work allowed for this call to do
4344 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4345 struct e1000_rx_ring *rx_ring,
4346 int *work_done, int work_to_do)
4348 struct net_device *netdev = adapter->netdev;
4349 struct pci_dev *pdev = adapter->pdev;
4350 struct e1000_rx_desc *rx_desc, *next_rxd;
4351 struct e1000_rx_buffer *buffer_info, *next_buffer;
4354 int cleaned_count = 0;
4355 bool cleaned = false;
4356 unsigned int total_rx_bytes=0, total_rx_packets=0;
4358 i = rx_ring->next_to_clean;
4359 rx_desc = E1000_RX_DESC(*rx_ring, i);
4360 buffer_info = &rx_ring->buffer_info[i];
4362 while (rx_desc->status & E1000_RXD_STAT_DD) {
4363 struct sk_buff *skb;
4367 if (*work_done >= work_to_do)
4370 rmb(); /* read descriptor and rx_buffer_info after status DD */
4372 status = rx_desc->status;
4373 length = le16_to_cpu(rx_desc->length);
4375 data = buffer_info->rxbuf.data;
4377 skb = e1000_copybreak(adapter, buffer_info, length, data);
4379 unsigned int frag_len = e1000_frag_len(adapter);
4381 skb = build_skb(data - E1000_HEADROOM, frag_len);
4383 adapter->alloc_rx_buff_failed++;
4387 skb_reserve(skb, E1000_HEADROOM);
4388 dma_unmap_single(&pdev->dev, buffer_info->dma,
4389 adapter->rx_buffer_len,
4391 buffer_info->dma = 0;
4392 buffer_info->rxbuf.data = NULL;
4395 if (++i == rx_ring->count) i = 0;
4396 next_rxd = E1000_RX_DESC(*rx_ring, i);
4399 next_buffer = &rx_ring->buffer_info[i];
4404 /* !EOP means multiple descriptors were used to store a single
4405 * packet, if thats the case we need to toss it. In fact, we
4406 * to toss every packet with the EOP bit clear and the next
4407 * frame that _does_ have the EOP bit set, as it is by
4408 * definition only a frame fragment
4410 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4411 adapter->discarding = true;
4413 if (adapter->discarding) {
4414 /* All receives must fit into a single buffer */
4415 netdev_dbg(netdev, "Receive packet consumed multiple buffers\n");
4417 if (status & E1000_RXD_STAT_EOP)
4418 adapter->discarding = false;
4422 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4423 if (e1000_tbi_should_accept(adapter, status,
4427 } else if (netdev->features & NETIF_F_RXALL) {
4436 total_rx_bytes += (length - 4); /* don't count FCS */
4439 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4440 /* adjust length to remove Ethernet CRC, this must be
4441 * done after the TBI_ACCEPT workaround above
4445 if (buffer_info->rxbuf.data == NULL)
4446 skb_put(skb, length);
4447 else /* copybreak skb */
4448 skb_trim(skb, length);
4450 /* Receive Checksum Offload */
4451 e1000_rx_checksum(adapter,
4453 ((u32)(rx_desc->errors) << 24),
4454 le16_to_cpu(rx_desc->csum), skb);
4456 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4459 rx_desc->status = 0;
4461 /* return some buffers to hardware, one at a time is too slow */
4462 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4463 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4467 /* use prefetched values */
4469 buffer_info = next_buffer;
4471 rx_ring->next_to_clean = i;
4473 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4475 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4477 adapter->total_rx_packets += total_rx_packets;
4478 adapter->total_rx_bytes += total_rx_bytes;
4479 netdev->stats.rx_bytes += total_rx_bytes;
4480 netdev->stats.rx_packets += total_rx_packets;
4485 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4486 * @adapter: address of board private structure
4487 * @rx_ring: pointer to receive ring structure
4488 * @cleaned_count: number of buffers to allocate this pass
4491 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4492 struct e1000_rx_ring *rx_ring, int cleaned_count)
4494 struct pci_dev *pdev = adapter->pdev;
4495 struct e1000_rx_desc *rx_desc;
4496 struct e1000_rx_buffer *buffer_info;
4499 i = rx_ring->next_to_use;
4500 buffer_info = &rx_ring->buffer_info[i];
4502 while (cleaned_count--) {
4503 /* allocate a new page if necessary */
4504 if (!buffer_info->rxbuf.page) {
4505 buffer_info->rxbuf.page = alloc_page(GFP_ATOMIC);
4506 if (unlikely(!buffer_info->rxbuf.page)) {
4507 adapter->alloc_rx_buff_failed++;
4512 if (!buffer_info->dma) {
4513 buffer_info->dma = dma_map_page(&pdev->dev,
4514 buffer_info->rxbuf.page, 0,
4515 adapter->rx_buffer_len,
4517 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4518 put_page(buffer_info->rxbuf.page);
4519 buffer_info->rxbuf.page = NULL;
4520 buffer_info->dma = 0;
4521 adapter->alloc_rx_buff_failed++;
4526 rx_desc = E1000_RX_DESC(*rx_ring, i);
4527 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4529 if (unlikely(++i == rx_ring->count))
4531 buffer_info = &rx_ring->buffer_info[i];
4534 if (likely(rx_ring->next_to_use != i)) {
4535 rx_ring->next_to_use = i;
4536 if (unlikely(i-- == 0))
4537 i = (rx_ring->count - 1);
4539 /* Force memory writes to complete before letting h/w
4540 * know there are new descriptors to fetch. (Only
4541 * applicable for weak-ordered memory model archs,
4545 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4550 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4551 * @adapter: address of board private structure
4553 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4554 struct e1000_rx_ring *rx_ring,
4557 struct e1000_hw *hw = &adapter->hw;
4558 struct pci_dev *pdev = adapter->pdev;
4559 struct e1000_rx_desc *rx_desc;
4560 struct e1000_rx_buffer *buffer_info;
4562 unsigned int bufsz = adapter->rx_buffer_len;
4564 i = rx_ring->next_to_use;
4565 buffer_info = &rx_ring->buffer_info[i];
4567 while (cleaned_count--) {
4570 if (buffer_info->rxbuf.data)
4573 data = e1000_alloc_frag(adapter);
4575 /* Better luck next round */
4576 adapter->alloc_rx_buff_failed++;
4580 /* Fix for errata 23, can't cross 64kB boundary */
4581 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4582 void *olddata = data;
4583 e_err(rx_err, "skb align check failed: %u bytes at "
4584 "%p\n", bufsz, data);
4585 /* Try again, without freeing the previous */
4586 data = e1000_alloc_frag(adapter);
4587 /* Failed allocation, critical failure */
4589 e1000_free_frag(olddata);
4590 adapter->alloc_rx_buff_failed++;
4594 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4596 e1000_free_frag(data);
4597 e1000_free_frag(olddata);
4598 adapter->alloc_rx_buff_failed++;
4602 /* Use new allocation */
4603 e1000_free_frag(olddata);
4605 buffer_info->dma = dma_map_single(&pdev->dev,
4607 adapter->rx_buffer_len,
4609 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4610 e1000_free_frag(data);
4611 buffer_info->dma = 0;
4612 adapter->alloc_rx_buff_failed++;
4616 /* XXX if it was allocated cleanly it will never map to a
4620 /* Fix for errata 23, can't cross 64kB boundary */
4621 if (!e1000_check_64k_bound(adapter,
4622 (void *)(unsigned long)buffer_info->dma,
4623 adapter->rx_buffer_len)) {
4624 e_err(rx_err, "dma align check failed: %u bytes at "
4625 "%p\n", adapter->rx_buffer_len,
4626 (void *)(unsigned long)buffer_info->dma);
4628 dma_unmap_single(&pdev->dev, buffer_info->dma,
4629 adapter->rx_buffer_len,
4632 e1000_free_frag(data);
4633 buffer_info->rxbuf.data = NULL;
4634 buffer_info->dma = 0;
4636 adapter->alloc_rx_buff_failed++;
4639 buffer_info->rxbuf.data = data;
4641 rx_desc = E1000_RX_DESC(*rx_ring, i);
4642 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4644 if (unlikely(++i == rx_ring->count))
4646 buffer_info = &rx_ring->buffer_info[i];
4649 if (likely(rx_ring->next_to_use != i)) {
4650 rx_ring->next_to_use = i;
4651 if (unlikely(i-- == 0))
4652 i = (rx_ring->count - 1);
4654 /* Force memory writes to complete before letting h/w
4655 * know there are new descriptors to fetch. (Only
4656 * applicable for weak-ordered memory model archs,
4660 writel(i, hw->hw_addr + rx_ring->rdt);
4665 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4668 static void e1000_smartspeed(struct e1000_adapter *adapter)
4670 struct e1000_hw *hw = &adapter->hw;
4674 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4675 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4678 if (adapter->smartspeed == 0) {
4679 /* If Master/Slave config fault is asserted twice,
4680 * we assume back-to-back
4682 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4683 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4684 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4685 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4686 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4687 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4688 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4689 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4691 adapter->smartspeed++;
4692 if (!e1000_phy_setup_autoneg(hw) &&
4693 !e1000_read_phy_reg(hw, PHY_CTRL,
4695 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4696 MII_CR_RESTART_AUTO_NEG);
4697 e1000_write_phy_reg(hw, PHY_CTRL,
4702 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4703 /* If still no link, perhaps using 2/3 pair cable */
4704 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4705 phy_ctrl |= CR_1000T_MS_ENABLE;
4706 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4707 if (!e1000_phy_setup_autoneg(hw) &&
4708 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4709 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4710 MII_CR_RESTART_AUTO_NEG);
4711 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4714 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4715 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4716 adapter->smartspeed = 0;
4725 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4731 return e1000_mii_ioctl(netdev, ifr, cmd);
4743 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4746 struct e1000_adapter *adapter = netdev_priv(netdev);
4747 struct e1000_hw *hw = &adapter->hw;
4748 struct mii_ioctl_data *data = if_mii(ifr);
4751 unsigned long flags;
4753 if (hw->media_type != e1000_media_type_copper)
4758 data->phy_id = hw->phy_addr;
4761 spin_lock_irqsave(&adapter->stats_lock, flags);
4762 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4764 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4767 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4770 if (data->reg_num & ~(0x1F))
4772 mii_reg = data->val_in;
4773 spin_lock_irqsave(&adapter->stats_lock, flags);
4774 if (e1000_write_phy_reg(hw, data->reg_num,
4776 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4779 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4780 if (hw->media_type == e1000_media_type_copper) {
4781 switch (data->reg_num) {
4783 if (mii_reg & MII_CR_POWER_DOWN)
4785 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4787 hw->autoneg_advertised = 0x2F;
4792 else if (mii_reg & 0x2000)
4796 retval = e1000_set_spd_dplx(
4804 if (netif_running(adapter->netdev))
4805 e1000_reinit_locked(adapter);
4807 e1000_reset(adapter);
4809 case M88E1000_PHY_SPEC_CTRL:
4810 case M88E1000_EXT_PHY_SPEC_CTRL:
4811 if (e1000_phy_reset(hw))
4816 switch (data->reg_num) {
4818 if (mii_reg & MII_CR_POWER_DOWN)
4820 if (netif_running(adapter->netdev))
4821 e1000_reinit_locked(adapter);
4823 e1000_reset(adapter);
4831 return E1000_SUCCESS;
4834 void e1000_pci_set_mwi(struct e1000_hw *hw)
4836 struct e1000_adapter *adapter = hw->back;
4837 int ret_val = pci_set_mwi(adapter->pdev);
4840 e_err(probe, "Error in setting MWI\n");
4843 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4845 struct e1000_adapter *adapter = hw->back;
4847 pci_clear_mwi(adapter->pdev);
4850 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4852 struct e1000_adapter *adapter = hw->back;
4853 return pcix_get_mmrbc(adapter->pdev);
4856 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4858 struct e1000_adapter *adapter = hw->back;
4859 pcix_set_mmrbc(adapter->pdev, mmrbc);
4862 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4867 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4871 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4876 static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4877 netdev_features_t features)
4879 struct e1000_hw *hw = &adapter->hw;
4883 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
4884 /* enable VLAN tag insert/strip */
4885 ctrl |= E1000_CTRL_VME;
4887 /* disable VLAN tag insert/strip */
4888 ctrl &= ~E1000_CTRL_VME;
4892 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4895 struct e1000_hw *hw = &adapter->hw;
4898 if (!test_bit(__E1000_DOWN, &adapter->flags))
4899 e1000_irq_disable(adapter);
4901 __e1000_vlan_mode(adapter, adapter->netdev->features);
4903 /* enable VLAN receive filtering */
4905 rctl &= ~E1000_RCTL_CFIEN;
4906 if (!(adapter->netdev->flags & IFF_PROMISC))
4907 rctl |= E1000_RCTL_VFE;
4909 e1000_update_mng_vlan(adapter);
4911 /* disable VLAN receive filtering */
4913 rctl &= ~E1000_RCTL_VFE;
4917 if (!test_bit(__E1000_DOWN, &adapter->flags))
4918 e1000_irq_enable(adapter);
4921 static void e1000_vlan_mode(struct net_device *netdev,
4922 netdev_features_t features)
4924 struct e1000_adapter *adapter = netdev_priv(netdev);
4926 if (!test_bit(__E1000_DOWN, &adapter->flags))
4927 e1000_irq_disable(adapter);
4929 __e1000_vlan_mode(adapter, features);
4931 if (!test_bit(__E1000_DOWN, &adapter->flags))
4932 e1000_irq_enable(adapter);
4935 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
4936 __be16 proto, u16 vid)
4938 struct e1000_adapter *adapter = netdev_priv(netdev);
4939 struct e1000_hw *hw = &adapter->hw;
4942 if ((hw->mng_cookie.status &
4943 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4944 (vid == adapter->mng_vlan_id))
4947 if (!e1000_vlan_used(adapter))
4948 e1000_vlan_filter_on_off(adapter, true);
4950 /* add VID to filter table */
4951 index = (vid >> 5) & 0x7F;
4952 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4953 vfta |= (1 << (vid & 0x1F));
4954 e1000_write_vfta(hw, index, vfta);
4956 set_bit(vid, adapter->active_vlans);
4961 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
4962 __be16 proto, u16 vid)
4964 struct e1000_adapter *adapter = netdev_priv(netdev);
4965 struct e1000_hw *hw = &adapter->hw;
4968 if (!test_bit(__E1000_DOWN, &adapter->flags))
4969 e1000_irq_disable(adapter);
4970 if (!test_bit(__E1000_DOWN, &adapter->flags))
4971 e1000_irq_enable(adapter);
4973 /* remove VID from filter table */
4974 index = (vid >> 5) & 0x7F;
4975 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4976 vfta &= ~(1 << (vid & 0x1F));
4977 e1000_write_vfta(hw, index, vfta);
4979 clear_bit(vid, adapter->active_vlans);
4981 if (!e1000_vlan_used(adapter))
4982 e1000_vlan_filter_on_off(adapter, false);
4987 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4991 if (!e1000_vlan_used(adapter))
4994 e1000_vlan_filter_on_off(adapter, true);
4995 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4996 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
4999 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
5001 struct e1000_hw *hw = &adapter->hw;
5005 /* Make sure dplx is at most 1 bit and lsb of speed is not set
5006 * for the switch() below to work
5008 if ((spd & 1) || (dplx & ~1))
5011 /* Fiber NICs only allow 1000 gbps Full duplex */
5012 if ((hw->media_type == e1000_media_type_fiber) &&
5013 spd != SPEED_1000 &&
5014 dplx != DUPLEX_FULL)
5017 switch (spd + dplx) {
5018 case SPEED_10 + DUPLEX_HALF:
5019 hw->forced_speed_duplex = e1000_10_half;
5021 case SPEED_10 + DUPLEX_FULL:
5022 hw->forced_speed_duplex = e1000_10_full;
5024 case SPEED_100 + DUPLEX_HALF:
5025 hw->forced_speed_duplex = e1000_100_half;
5027 case SPEED_100 + DUPLEX_FULL:
5028 hw->forced_speed_duplex = e1000_100_full;
5030 case SPEED_1000 + DUPLEX_FULL:
5032 hw->autoneg_advertised = ADVERTISE_1000_FULL;
5034 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5039 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
5040 hw->mdix = AUTO_ALL_MODES;
5045 e_err(probe, "Unsupported Speed/Duplex configuration\n");
5049 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
5051 struct net_device *netdev = pci_get_drvdata(pdev);
5052 struct e1000_adapter *adapter = netdev_priv(netdev);
5053 struct e1000_hw *hw = &adapter->hw;
5054 u32 ctrl, ctrl_ext, rctl, status;
5055 u32 wufc = adapter->wol;
5060 netif_device_detach(netdev);
5062 if (netif_running(netdev)) {
5063 int count = E1000_CHECK_RESET_COUNT;
5065 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
5066 usleep_range(10000, 20000);
5068 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5069 e1000_down(adapter);
5073 retval = pci_save_state(pdev);
5078 status = er32(STATUS);
5079 if (status & E1000_STATUS_LU)
5080 wufc &= ~E1000_WUFC_LNKC;
5083 e1000_setup_rctl(adapter);
5084 e1000_set_rx_mode(netdev);
5088 /* turn on all-multi mode if wake on multicast is enabled */
5089 if (wufc & E1000_WUFC_MC)
5090 rctl |= E1000_RCTL_MPE;
5092 /* enable receives in the hardware */
5093 ew32(RCTL, rctl | E1000_RCTL_EN);
5095 if (hw->mac_type >= e1000_82540) {
5097 /* advertise wake from D3Cold */
5098 #define E1000_CTRL_ADVD3WUC 0x00100000
5099 /* phy power management enable */
5100 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5101 ctrl |= E1000_CTRL_ADVD3WUC |
5102 E1000_CTRL_EN_PHY_PWR_MGMT;
5106 if (hw->media_type == e1000_media_type_fiber ||
5107 hw->media_type == e1000_media_type_internal_serdes) {
5108 /* keep the laser running in D3 */
5109 ctrl_ext = er32(CTRL_EXT);
5110 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5111 ew32(CTRL_EXT, ctrl_ext);
5114 ew32(WUC, E1000_WUC_PME_EN);
5121 e1000_release_manageability(adapter);
5123 *enable_wake = !!wufc;
5125 /* make sure adapter isn't asleep if manageability is enabled */
5126 if (adapter->en_mng_pt)
5127 *enable_wake = true;
5129 if (netif_running(netdev))
5130 e1000_free_irq(adapter);
5132 pci_disable_device(pdev);
5138 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5143 retval = __e1000_shutdown(pdev, &wake);
5148 pci_prepare_to_sleep(pdev);
5150 pci_wake_from_d3(pdev, false);
5151 pci_set_power_state(pdev, PCI_D3hot);
5157 static int e1000_resume(struct pci_dev *pdev)
5159 struct net_device *netdev = pci_get_drvdata(pdev);
5160 struct e1000_adapter *adapter = netdev_priv(netdev);
5161 struct e1000_hw *hw = &adapter->hw;
5164 pci_set_power_state(pdev, PCI_D0);
5165 pci_restore_state(pdev);
5166 pci_save_state(pdev);
5168 if (adapter->need_ioport)
5169 err = pci_enable_device(pdev);
5171 err = pci_enable_device_mem(pdev);
5173 pr_err("Cannot enable PCI device from suspend\n");
5176 pci_set_master(pdev);
5178 pci_enable_wake(pdev, PCI_D3hot, 0);
5179 pci_enable_wake(pdev, PCI_D3cold, 0);
5181 if (netif_running(netdev)) {
5182 err = e1000_request_irq(adapter);
5187 e1000_power_up_phy(adapter);
5188 e1000_reset(adapter);
5191 e1000_init_manageability(adapter);
5193 if (netif_running(netdev))
5196 netif_device_attach(netdev);
5202 static void e1000_shutdown(struct pci_dev *pdev)
5206 __e1000_shutdown(pdev, &wake);
5208 if (system_state == SYSTEM_POWER_OFF) {
5209 pci_wake_from_d3(pdev, wake);
5210 pci_set_power_state(pdev, PCI_D3hot);
5214 #ifdef CONFIG_NET_POLL_CONTROLLER
5215 /* Polling 'interrupt' - used by things like netconsole to send skbs
5216 * without having to re-enable interrupts. It's not called while
5217 * the interrupt routine is executing.
5219 static void e1000_netpoll(struct net_device *netdev)
5221 struct e1000_adapter *adapter = netdev_priv(netdev);
5223 disable_irq(adapter->pdev->irq);
5224 e1000_intr(adapter->pdev->irq, netdev);
5225 enable_irq(adapter->pdev->irq);
5230 * e1000_io_error_detected - called when PCI error is detected
5231 * @pdev: Pointer to PCI device
5232 * @state: The current pci connection state
5234 * This function is called after a PCI bus error affecting
5235 * this device has been detected.
5237 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5238 pci_channel_state_t state)
5240 struct net_device *netdev = pci_get_drvdata(pdev);
5241 struct e1000_adapter *adapter = netdev_priv(netdev);
5243 netif_device_detach(netdev);
5245 if (state == pci_channel_io_perm_failure)
5246 return PCI_ERS_RESULT_DISCONNECT;
5248 if (netif_running(netdev))
5249 e1000_down(adapter);
5250 pci_disable_device(pdev);
5252 /* Request a slot slot reset. */
5253 return PCI_ERS_RESULT_NEED_RESET;
5257 * e1000_io_slot_reset - called after the pci bus has been reset.
5258 * @pdev: Pointer to PCI device
5260 * Restart the card from scratch, as if from a cold-boot. Implementation
5261 * resembles the first-half of the e1000_resume routine.
5263 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5265 struct net_device *netdev = pci_get_drvdata(pdev);
5266 struct e1000_adapter *adapter = netdev_priv(netdev);
5267 struct e1000_hw *hw = &adapter->hw;
5270 if (adapter->need_ioport)
5271 err = pci_enable_device(pdev);
5273 err = pci_enable_device_mem(pdev);
5275 pr_err("Cannot re-enable PCI device after reset.\n");
5276 return PCI_ERS_RESULT_DISCONNECT;
5278 pci_set_master(pdev);
5280 pci_enable_wake(pdev, PCI_D3hot, 0);
5281 pci_enable_wake(pdev, PCI_D3cold, 0);
5283 e1000_reset(adapter);
5286 return PCI_ERS_RESULT_RECOVERED;
5290 * e1000_io_resume - called when traffic can start flowing again.
5291 * @pdev: Pointer to PCI device
5293 * This callback is called when the error recovery driver tells us that
5294 * its OK to resume normal operation. Implementation resembles the
5295 * second-half of the e1000_resume routine.
5297 static void e1000_io_resume(struct pci_dev *pdev)
5299 struct net_device *netdev = pci_get_drvdata(pdev);
5300 struct e1000_adapter *adapter = netdev_priv(netdev);
5302 e1000_init_manageability(adapter);
5304 if (netif_running(netdev)) {
5305 if (e1000_up(adapter)) {
5306 pr_info("can't bring device back up after reset\n");
5311 netif_device_attach(netdev);