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 int e1000_open(struct net_device *netdev);
118 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_dummy_rx_buffers(struct e1000_adapter *adapter,
148 struct e1000_rx_ring *rx_ring,
152 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
153 struct e1000_rx_ring *rx_ring,
155 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
156 struct e1000_rx_ring *rx_ring,
158 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
159 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
161 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
162 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
163 static void e1000_tx_timeout(struct net_device *dev);
164 static void e1000_reset_task(struct work_struct *work);
165 static void e1000_smartspeed(struct e1000_adapter *adapter);
166 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
167 struct sk_buff *skb);
169 static bool e1000_vlan_used(struct e1000_adapter *adapter);
170 static void e1000_vlan_mode(struct net_device *netdev,
171 netdev_features_t features);
172 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
174 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
175 __be16 proto, u16 vid);
176 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
177 __be16 proto, u16 vid);
178 static void e1000_restore_vlan(struct e1000_adapter *adapter);
181 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
182 static int e1000_resume(struct pci_dev *pdev);
184 static void e1000_shutdown(struct pci_dev *pdev);
186 #ifdef CONFIG_NET_POLL_CONTROLLER
187 /* for netdump / net console */
188 static void e1000_netpoll (struct net_device *netdev);
191 #define COPYBREAK_DEFAULT 256
192 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
193 module_param(copybreak, uint, 0644);
194 MODULE_PARM_DESC(copybreak,
195 "Maximum size of packet that is copied to a new buffer on receive");
197 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
198 pci_channel_state_t state);
199 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
200 static void e1000_io_resume(struct pci_dev *pdev);
202 static const struct pci_error_handlers e1000_err_handler = {
203 .error_detected = e1000_io_error_detected,
204 .slot_reset = e1000_io_slot_reset,
205 .resume = e1000_io_resume,
208 static struct pci_driver e1000_driver = {
209 .name = e1000_driver_name,
210 .id_table = e1000_pci_tbl,
211 .probe = e1000_probe,
212 .remove = e1000_remove,
214 /* Power Management Hooks */
215 .suspend = e1000_suspend,
216 .resume = e1000_resume,
218 .shutdown = e1000_shutdown,
219 .err_handler = &e1000_err_handler
222 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
223 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
224 MODULE_LICENSE("GPL");
225 MODULE_VERSION(DRV_VERSION);
227 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
228 static int debug = -1;
229 module_param(debug, int, 0);
230 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
233 * e1000_get_hw_dev - return device
234 * used by hardware layer to print debugging information
237 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
239 struct e1000_adapter *adapter = hw->back;
240 return adapter->netdev;
244 * e1000_init_module - Driver Registration Routine
246 * e1000_init_module is the first routine called when the driver is
247 * loaded. All it does is register with the PCI subsystem.
249 static int __init e1000_init_module(void)
252 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
254 pr_info("%s\n", e1000_copyright);
256 ret = pci_register_driver(&e1000_driver);
257 if (copybreak != COPYBREAK_DEFAULT) {
259 pr_info("copybreak disabled\n");
261 pr_info("copybreak enabled for "
262 "packets <= %u bytes\n", copybreak);
267 module_init(e1000_init_module);
270 * e1000_exit_module - Driver Exit Cleanup Routine
272 * e1000_exit_module is called just before the driver is removed
275 static void __exit e1000_exit_module(void)
277 pci_unregister_driver(&e1000_driver);
280 module_exit(e1000_exit_module);
282 static int e1000_request_irq(struct e1000_adapter *adapter)
284 struct net_device *netdev = adapter->netdev;
285 irq_handler_t handler = e1000_intr;
286 int irq_flags = IRQF_SHARED;
289 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
292 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
298 static void e1000_free_irq(struct e1000_adapter *adapter)
300 struct net_device *netdev = adapter->netdev;
302 free_irq(adapter->pdev->irq, netdev);
306 * e1000_irq_disable - Mask off interrupt generation on the NIC
307 * @adapter: board private structure
309 static void e1000_irq_disable(struct e1000_adapter *adapter)
311 struct e1000_hw *hw = &adapter->hw;
315 synchronize_irq(adapter->pdev->irq);
319 * e1000_irq_enable - Enable default interrupt generation settings
320 * @adapter: board private structure
322 static void e1000_irq_enable(struct e1000_adapter *adapter)
324 struct e1000_hw *hw = &adapter->hw;
326 ew32(IMS, IMS_ENABLE_MASK);
330 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
332 struct e1000_hw *hw = &adapter->hw;
333 struct net_device *netdev = adapter->netdev;
334 u16 vid = hw->mng_cookie.vlan_id;
335 u16 old_vid = adapter->mng_vlan_id;
337 if (!e1000_vlan_used(adapter))
340 if (!test_bit(vid, adapter->active_vlans)) {
341 if (hw->mng_cookie.status &
342 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
343 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
344 adapter->mng_vlan_id = vid;
346 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
348 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
350 !test_bit(old_vid, adapter->active_vlans))
351 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
354 adapter->mng_vlan_id = vid;
358 static void e1000_init_manageability(struct e1000_adapter *adapter)
360 struct e1000_hw *hw = &adapter->hw;
362 if (adapter->en_mng_pt) {
363 u32 manc = er32(MANC);
365 /* disable hardware interception of ARP */
366 manc &= ~(E1000_MANC_ARP_EN);
372 static void e1000_release_manageability(struct e1000_adapter *adapter)
374 struct e1000_hw *hw = &adapter->hw;
376 if (adapter->en_mng_pt) {
377 u32 manc = er32(MANC);
379 /* re-enable hardware interception of ARP */
380 manc |= E1000_MANC_ARP_EN;
387 * e1000_configure - configure the hardware for RX and TX
388 * @adapter = private board structure
390 static void e1000_configure(struct e1000_adapter *adapter)
392 struct net_device *netdev = adapter->netdev;
395 e1000_set_rx_mode(netdev);
397 e1000_restore_vlan(adapter);
398 e1000_init_manageability(adapter);
400 e1000_configure_tx(adapter);
401 e1000_setup_rctl(adapter);
402 e1000_configure_rx(adapter);
403 /* call E1000_DESC_UNUSED which always leaves
404 * at least 1 descriptor unused to make sure
405 * next_to_use != next_to_clean
407 for (i = 0; i < adapter->num_rx_queues; i++) {
408 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
409 adapter->alloc_rx_buf(adapter, ring,
410 E1000_DESC_UNUSED(ring));
414 int e1000_up(struct e1000_adapter *adapter)
416 struct e1000_hw *hw = &adapter->hw;
418 /* hardware has been reset, we need to reload some things */
419 e1000_configure(adapter);
421 clear_bit(__E1000_DOWN, &adapter->flags);
423 napi_enable(&adapter->napi);
425 e1000_irq_enable(adapter);
427 netif_wake_queue(adapter->netdev);
429 /* fire a link change interrupt to start the watchdog */
430 ew32(ICS, E1000_ICS_LSC);
435 * e1000_power_up_phy - restore link in case the phy was powered down
436 * @adapter: address of board private structure
438 * The phy may be powered down to save power and turn off link when the
439 * driver is unloaded and wake on lan is not enabled (among others)
440 * *** this routine MUST be followed by a call to e1000_reset ***
442 void e1000_power_up_phy(struct e1000_adapter *adapter)
444 struct e1000_hw *hw = &adapter->hw;
447 /* Just clear the power down bit to wake the phy back up */
448 if (hw->media_type == e1000_media_type_copper) {
449 /* according to the manual, the phy will retain its
450 * settings across a power-down/up cycle
452 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
453 mii_reg &= ~MII_CR_POWER_DOWN;
454 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
458 static void e1000_power_down_phy(struct e1000_adapter *adapter)
460 struct e1000_hw *hw = &adapter->hw;
462 /* Power down the PHY so no link is implied when interface is down *
463 * The PHY cannot be powered down if any of the following is true *
466 * (c) SoL/IDER session is active
468 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
469 hw->media_type == e1000_media_type_copper) {
472 switch (hw->mac_type) {
475 case e1000_82545_rev_3:
478 case e1000_82546_rev_3:
480 case e1000_82541_rev_2:
482 case e1000_82547_rev_2:
483 if (er32(MANC) & E1000_MANC_SMBUS_EN)
489 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
490 mii_reg |= MII_CR_POWER_DOWN;
491 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
498 static void e1000_down_and_stop(struct e1000_adapter *adapter)
500 set_bit(__E1000_DOWN, &adapter->flags);
502 cancel_delayed_work_sync(&adapter->watchdog_task);
505 * Since the watchdog task can reschedule other tasks, we should cancel
506 * it first, otherwise we can run into the situation when a work is
507 * still running after the adapter has been turned down.
510 cancel_delayed_work_sync(&adapter->phy_info_task);
511 cancel_delayed_work_sync(&adapter->fifo_stall_task);
513 /* Only kill reset task if adapter is not resetting */
514 if (!test_bit(__E1000_RESETTING, &adapter->flags))
515 cancel_work_sync(&adapter->reset_task);
518 void e1000_down(struct e1000_adapter *adapter)
520 struct e1000_hw *hw = &adapter->hw;
521 struct net_device *netdev = adapter->netdev;
524 /* disable receives in the hardware */
526 ew32(RCTL, rctl & ~E1000_RCTL_EN);
527 /* flush and sleep below */
529 netif_tx_disable(netdev);
531 /* disable transmits in the hardware */
533 tctl &= ~E1000_TCTL_EN;
535 /* flush both disables and wait for them to finish */
539 /* Set the carrier off after transmits have been disabled in the
540 * hardware, to avoid race conditions with e1000_watchdog() (which
541 * may be running concurrently to us, checking for the carrier
542 * bit to decide whether it should enable transmits again). Such
543 * a race condition would result into transmission being disabled
544 * in the hardware until the next IFF_DOWN+IFF_UP cycle.
546 netif_carrier_off(netdev);
548 napi_disable(&adapter->napi);
550 e1000_irq_disable(adapter);
552 /* Setting DOWN must be after irq_disable to prevent
553 * a screaming interrupt. Setting DOWN also prevents
554 * tasks from rescheduling.
556 e1000_down_and_stop(adapter);
558 adapter->link_speed = 0;
559 adapter->link_duplex = 0;
561 e1000_reset(adapter);
562 e1000_clean_all_tx_rings(adapter);
563 e1000_clean_all_rx_rings(adapter);
566 void e1000_reinit_locked(struct e1000_adapter *adapter)
568 WARN_ON(in_interrupt());
569 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
572 /* only run the task if not already down */
573 if (!test_bit(__E1000_DOWN, &adapter->flags)) {
578 clear_bit(__E1000_RESETTING, &adapter->flags);
581 void e1000_reset(struct e1000_adapter *adapter)
583 struct e1000_hw *hw = &adapter->hw;
584 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
585 bool legacy_pba_adjust = false;
588 /* Repartition Pba for greater than 9k mtu
589 * To take effect CTRL.RST is required.
592 switch (hw->mac_type) {
593 case e1000_82542_rev2_0:
594 case e1000_82542_rev2_1:
599 case e1000_82541_rev_2:
600 legacy_pba_adjust = true;
604 case e1000_82545_rev_3:
607 case e1000_82546_rev_3:
611 case e1000_82547_rev_2:
612 legacy_pba_adjust = true;
615 case e1000_undefined:
620 if (legacy_pba_adjust) {
621 if (hw->max_frame_size > E1000_RXBUFFER_8192)
622 pba -= 8; /* allocate more FIFO for Tx */
624 if (hw->mac_type == e1000_82547) {
625 adapter->tx_fifo_head = 0;
626 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
627 adapter->tx_fifo_size =
628 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
629 atomic_set(&adapter->tx_fifo_stall, 0);
631 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
632 /* adjust PBA for jumbo frames */
635 /* To maintain wire speed transmits, the Tx FIFO should be
636 * large enough to accommodate two full transmit packets,
637 * rounded up to the next 1KB and expressed in KB. Likewise,
638 * the Rx FIFO should be large enough to accommodate at least
639 * one full receive packet and is similarly rounded up and
643 /* upper 16 bits has Tx packet buffer allocation size in KB */
644 tx_space = pba >> 16;
645 /* lower 16 bits has Rx packet buffer allocation size in KB */
647 /* the Tx fifo also stores 16 bytes of information about the Tx
648 * but don't include ethernet FCS because hardware appends it
650 min_tx_space = (hw->max_frame_size +
651 sizeof(struct e1000_tx_desc) -
653 min_tx_space = ALIGN(min_tx_space, 1024);
655 /* software strips receive CRC, so leave room for it */
656 min_rx_space = hw->max_frame_size;
657 min_rx_space = ALIGN(min_rx_space, 1024);
660 /* If current Tx allocation is less than the min Tx FIFO size,
661 * and the min Tx FIFO size is less than the current Rx FIFO
662 * allocation, take space away from current Rx allocation
664 if (tx_space < min_tx_space &&
665 ((min_tx_space - tx_space) < pba)) {
666 pba = pba - (min_tx_space - tx_space);
668 /* PCI/PCIx hardware has PBA alignment constraints */
669 switch (hw->mac_type) {
670 case e1000_82545 ... e1000_82546_rev_3:
671 pba &= ~(E1000_PBA_8K - 1);
677 /* if short on Rx space, Rx wins and must trump Tx
678 * adjustment or use Early Receive if available
680 if (pba < min_rx_space)
687 /* flow control settings:
688 * The high water mark must be low enough to fit one full frame
689 * (or the size used for early receive) above it in the Rx FIFO.
690 * Set it to the lower of:
691 * - 90% of the Rx FIFO size, and
692 * - the full Rx FIFO size minus the early receive size (for parts
693 * with ERT support assuming ERT set to E1000_ERT_2048), or
694 * - the full Rx FIFO size minus one full frame
696 hwm = min(((pba << 10) * 9 / 10),
697 ((pba << 10) - hw->max_frame_size));
699 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
700 hw->fc_low_water = hw->fc_high_water - 8;
701 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
703 hw->fc = hw->original_fc;
705 /* Allow time for pending master requests to run */
707 if (hw->mac_type >= e1000_82544)
710 if (e1000_init_hw(hw))
711 e_dev_err("Hardware Error\n");
712 e1000_update_mng_vlan(adapter);
714 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
715 if (hw->mac_type >= e1000_82544 &&
717 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
718 u32 ctrl = er32(CTRL);
719 /* clear phy power management bit if we are in gig only mode,
720 * which if enabled will attempt negotiation to 100Mb, which
721 * can cause a loss of link at power off or driver unload
723 ctrl &= ~E1000_CTRL_SWDPIN3;
727 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
728 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
730 e1000_reset_adaptive(hw);
731 e1000_phy_get_info(hw, &adapter->phy_info);
733 e1000_release_manageability(adapter);
736 /* Dump the eeprom for users having checksum issues */
737 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
739 struct net_device *netdev = adapter->netdev;
740 struct ethtool_eeprom eeprom;
741 const struct ethtool_ops *ops = netdev->ethtool_ops;
744 u16 csum_old, csum_new = 0;
746 eeprom.len = ops->get_eeprom_len(netdev);
749 data = kmalloc(eeprom.len, GFP_KERNEL);
753 ops->get_eeprom(netdev, &eeprom, data);
755 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
756 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
757 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
758 csum_new += data[i] + (data[i + 1] << 8);
759 csum_new = EEPROM_SUM - csum_new;
761 pr_err("/*********************/\n");
762 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
763 pr_err("Calculated : 0x%04x\n", csum_new);
765 pr_err("Offset Values\n");
766 pr_err("======== ======\n");
767 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
769 pr_err("Include this output when contacting your support provider.\n");
770 pr_err("This is not a software error! Something bad happened to\n");
771 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
772 pr_err("result in further problems, possibly loss of data,\n");
773 pr_err("corruption or system hangs!\n");
774 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
775 pr_err("which is invalid and requires you to set the proper MAC\n");
776 pr_err("address manually before continuing to enable this network\n");
777 pr_err("device. Please inspect the EEPROM dump and report the\n");
778 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
779 pr_err("/*********************/\n");
785 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
786 * @pdev: PCI device information struct
788 * Return true if an adapter needs ioport resources
790 static int e1000_is_need_ioport(struct pci_dev *pdev)
792 switch (pdev->device) {
793 case E1000_DEV_ID_82540EM:
794 case E1000_DEV_ID_82540EM_LOM:
795 case E1000_DEV_ID_82540EP:
796 case E1000_DEV_ID_82540EP_LOM:
797 case E1000_DEV_ID_82540EP_LP:
798 case E1000_DEV_ID_82541EI:
799 case E1000_DEV_ID_82541EI_MOBILE:
800 case E1000_DEV_ID_82541ER:
801 case E1000_DEV_ID_82541ER_LOM:
802 case E1000_DEV_ID_82541GI:
803 case E1000_DEV_ID_82541GI_LF:
804 case E1000_DEV_ID_82541GI_MOBILE:
805 case E1000_DEV_ID_82544EI_COPPER:
806 case E1000_DEV_ID_82544EI_FIBER:
807 case E1000_DEV_ID_82544GC_COPPER:
808 case E1000_DEV_ID_82544GC_LOM:
809 case E1000_DEV_ID_82545EM_COPPER:
810 case E1000_DEV_ID_82545EM_FIBER:
811 case E1000_DEV_ID_82546EB_COPPER:
812 case E1000_DEV_ID_82546EB_FIBER:
813 case E1000_DEV_ID_82546EB_QUAD_COPPER:
820 static netdev_features_t e1000_fix_features(struct net_device *netdev,
821 netdev_features_t features)
823 /* Since there is no support for separate Rx/Tx vlan accel
824 * enable/disable make sure Tx flag is always in same state as Rx.
826 if (features & NETIF_F_HW_VLAN_CTAG_RX)
827 features |= NETIF_F_HW_VLAN_CTAG_TX;
829 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
834 static int e1000_set_features(struct net_device *netdev,
835 netdev_features_t features)
837 struct e1000_adapter *adapter = netdev_priv(netdev);
838 netdev_features_t changed = features ^ netdev->features;
840 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
841 e1000_vlan_mode(netdev, features);
843 if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL)))
846 netdev->features = features;
847 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
849 if (netif_running(netdev))
850 e1000_reinit_locked(adapter);
852 e1000_reset(adapter);
857 static const struct net_device_ops e1000_netdev_ops = {
858 .ndo_open = e1000_open,
859 .ndo_stop = e1000_close,
860 .ndo_start_xmit = e1000_xmit_frame,
861 .ndo_get_stats = e1000_get_stats,
862 .ndo_set_rx_mode = e1000_set_rx_mode,
863 .ndo_set_mac_address = e1000_set_mac,
864 .ndo_tx_timeout = e1000_tx_timeout,
865 .ndo_change_mtu = e1000_change_mtu,
866 .ndo_do_ioctl = e1000_ioctl,
867 .ndo_validate_addr = eth_validate_addr,
868 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
869 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
870 #ifdef CONFIG_NET_POLL_CONTROLLER
871 .ndo_poll_controller = e1000_netpoll,
873 .ndo_fix_features = e1000_fix_features,
874 .ndo_set_features = e1000_set_features,
878 * e1000_init_hw_struct - initialize members of hw struct
879 * @adapter: board private struct
880 * @hw: structure used by e1000_hw.c
882 * Factors out initialization of the e1000_hw struct to its own function
883 * that can be called very early at init (just after struct allocation).
884 * Fields are initialized based on PCI device information and
885 * OS network device settings (MTU size).
886 * Returns negative error codes if MAC type setup fails.
888 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
891 struct pci_dev *pdev = adapter->pdev;
893 /* PCI config space info */
894 hw->vendor_id = pdev->vendor;
895 hw->device_id = pdev->device;
896 hw->subsystem_vendor_id = pdev->subsystem_vendor;
897 hw->subsystem_id = pdev->subsystem_device;
898 hw->revision_id = pdev->revision;
900 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
902 hw->max_frame_size = adapter->netdev->mtu +
903 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
904 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
906 /* identify the MAC */
907 if (e1000_set_mac_type(hw)) {
908 e_err(probe, "Unknown MAC Type\n");
912 switch (hw->mac_type) {
917 case e1000_82541_rev_2:
918 case e1000_82547_rev_2:
919 hw->phy_init_script = 1;
923 e1000_set_media_type(hw);
924 e1000_get_bus_info(hw);
926 hw->wait_autoneg_complete = false;
927 hw->tbi_compatibility_en = true;
928 hw->adaptive_ifs = true;
932 if (hw->media_type == e1000_media_type_copper) {
933 hw->mdix = AUTO_ALL_MODES;
934 hw->disable_polarity_correction = false;
935 hw->master_slave = E1000_MASTER_SLAVE;
942 * e1000_probe - Device Initialization Routine
943 * @pdev: PCI device information struct
944 * @ent: entry in e1000_pci_tbl
946 * Returns 0 on success, negative on failure
948 * e1000_probe initializes an adapter identified by a pci_dev structure.
949 * The OS initialization, configuring of the adapter private structure,
950 * and a hardware reset occur.
952 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
954 struct net_device *netdev;
955 struct e1000_adapter *adapter = NULL;
958 static int cards_found;
959 static int global_quad_port_a; /* global ksp3 port a indication */
960 int i, err, pci_using_dac;
963 u16 eeprom_apme_mask = E1000_EEPROM_APME;
964 int bars, need_ioport;
965 bool disable_dev = false;
967 /* do not allocate ioport bars when not needed */
968 need_ioport = e1000_is_need_ioport(pdev);
970 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
971 err = pci_enable_device(pdev);
973 bars = pci_select_bars(pdev, IORESOURCE_MEM);
974 err = pci_enable_device_mem(pdev);
979 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
983 pci_set_master(pdev);
984 err = pci_save_state(pdev);
986 goto err_alloc_etherdev;
989 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
991 goto err_alloc_etherdev;
993 SET_NETDEV_DEV(netdev, &pdev->dev);
995 pci_set_drvdata(pdev, netdev);
996 adapter = netdev_priv(netdev);
997 adapter->netdev = netdev;
998 adapter->pdev = pdev;
999 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1000 adapter->bars = bars;
1001 adapter->need_ioport = need_ioport;
1007 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
1011 if (adapter->need_ioport) {
1012 for (i = BAR_1; i <= BAR_5; i++) {
1013 if (pci_resource_len(pdev, i) == 0)
1015 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1016 hw->io_base = pci_resource_start(pdev, i);
1022 /* make ready for any if (hw->...) below */
1023 err = e1000_init_hw_struct(adapter, hw);
1027 /* there is a workaround being applied below that limits
1028 * 64-bit DMA addresses to 64-bit hardware. There are some
1029 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1032 if ((hw->bus_type == e1000_bus_type_pcix) &&
1033 !dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
1036 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1038 pr_err("No usable DMA config, aborting\n");
1043 netdev->netdev_ops = &e1000_netdev_ops;
1044 e1000_set_ethtool_ops(netdev);
1045 netdev->watchdog_timeo = 5 * HZ;
1046 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1048 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1050 adapter->bd_number = cards_found;
1052 /* setup the private structure */
1054 err = e1000_sw_init(adapter);
1059 if (hw->mac_type == e1000_ce4100) {
1060 hw->ce4100_gbe_mdio_base_virt =
1061 ioremap(pci_resource_start(pdev, BAR_1),
1062 pci_resource_len(pdev, BAR_1));
1064 if (!hw->ce4100_gbe_mdio_base_virt)
1065 goto err_mdio_ioremap;
1068 if (hw->mac_type >= e1000_82543) {
1069 netdev->hw_features = NETIF_F_SG |
1071 NETIF_F_HW_VLAN_CTAG_RX;
1072 netdev->features = NETIF_F_HW_VLAN_CTAG_TX |
1073 NETIF_F_HW_VLAN_CTAG_FILTER;
1076 if ((hw->mac_type >= e1000_82544) &&
1077 (hw->mac_type != e1000_82547))
1078 netdev->hw_features |= NETIF_F_TSO;
1080 netdev->priv_flags |= IFF_SUPP_NOFCS;
1082 netdev->features |= netdev->hw_features;
1083 netdev->hw_features |= (NETIF_F_RXCSUM |
1087 if (pci_using_dac) {
1088 netdev->features |= NETIF_F_HIGHDMA;
1089 netdev->vlan_features |= NETIF_F_HIGHDMA;
1092 netdev->vlan_features |= (NETIF_F_TSO |
1096 /* Do not set IFF_UNICAST_FLT for VMWare's 82545EM */
1097 if (hw->device_id != E1000_DEV_ID_82545EM_COPPER ||
1098 hw->subsystem_vendor_id != PCI_VENDOR_ID_VMWARE)
1099 netdev->priv_flags |= IFF_UNICAST_FLT;
1101 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1103 /* initialize eeprom parameters */
1104 if (e1000_init_eeprom_params(hw)) {
1105 e_err(probe, "EEPROM initialization failed\n");
1109 /* before reading the EEPROM, reset the controller to
1110 * put the device in a known good starting state
1115 /* make sure the EEPROM is good */
1116 if (e1000_validate_eeprom_checksum(hw) < 0) {
1117 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1118 e1000_dump_eeprom(adapter);
1119 /* set MAC address to all zeroes to invalidate and temporary
1120 * disable this device for the user. This blocks regular
1121 * traffic while still permitting ethtool ioctls from reaching
1122 * the hardware as well as allowing the user to run the
1123 * interface after manually setting a hw addr using
1126 memset(hw->mac_addr, 0, netdev->addr_len);
1128 /* copy the MAC address out of the EEPROM */
1129 if (e1000_read_mac_addr(hw))
1130 e_err(probe, "EEPROM Read Error\n");
1132 /* don't block initialization here due to bad MAC address */
1133 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1135 if (!is_valid_ether_addr(netdev->dev_addr))
1136 e_err(probe, "Invalid MAC Address\n");
1139 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1140 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1141 e1000_82547_tx_fifo_stall_task);
1142 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1143 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1145 e1000_check_options(adapter);
1147 /* Initial Wake on LAN setting
1148 * If APM wake is enabled in the EEPROM,
1149 * enable the ACPI Magic Packet filter
1152 switch (hw->mac_type) {
1153 case e1000_82542_rev2_0:
1154 case e1000_82542_rev2_1:
1158 e1000_read_eeprom(hw,
1159 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1160 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1163 case e1000_82546_rev_3:
1164 if (er32(STATUS) & E1000_STATUS_FUNC_1) {
1165 e1000_read_eeprom(hw,
1166 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1171 e1000_read_eeprom(hw,
1172 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1175 if (eeprom_data & eeprom_apme_mask)
1176 adapter->eeprom_wol |= E1000_WUFC_MAG;
1178 /* now that we have the eeprom settings, apply the special cases
1179 * where the eeprom may be wrong or the board simply won't support
1180 * wake on lan on a particular port
1182 switch (pdev->device) {
1183 case E1000_DEV_ID_82546GB_PCIE:
1184 adapter->eeprom_wol = 0;
1186 case E1000_DEV_ID_82546EB_FIBER:
1187 case E1000_DEV_ID_82546GB_FIBER:
1188 /* Wake events only supported on port A for dual fiber
1189 * regardless of eeprom setting
1191 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1192 adapter->eeprom_wol = 0;
1194 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1195 /* if quad port adapter, disable WoL on all but port A */
1196 if (global_quad_port_a != 0)
1197 adapter->eeprom_wol = 0;
1199 adapter->quad_port_a = true;
1200 /* Reset for multiple quad port adapters */
1201 if (++global_quad_port_a == 4)
1202 global_quad_port_a = 0;
1206 /* initialize the wol settings based on the eeprom settings */
1207 adapter->wol = adapter->eeprom_wol;
1208 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1210 /* Auto detect PHY address */
1211 if (hw->mac_type == e1000_ce4100) {
1212 for (i = 0; i < 32; i++) {
1214 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1216 if (tmp != 0 && tmp != 0xFF)
1224 /* reset the hardware with the new settings */
1225 e1000_reset(adapter);
1227 strcpy(netdev->name, "eth%d");
1228 err = register_netdev(netdev);
1232 e1000_vlan_filter_on_off(adapter, false);
1234 /* print bus type/speed/width info */
1235 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1236 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1237 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1238 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1239 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1240 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1241 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1244 /* carrier off reporting is important to ethtool even BEFORE open */
1245 netif_carrier_off(netdev);
1247 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1254 e1000_phy_hw_reset(hw);
1256 if (hw->flash_address)
1257 iounmap(hw->flash_address);
1258 kfree(adapter->tx_ring);
1259 kfree(adapter->rx_ring);
1263 iounmap(hw->ce4100_gbe_mdio_base_virt);
1264 iounmap(hw->hw_addr);
1266 disable_dev = !test_and_set_bit(__E1000_DISABLED, &adapter->flags);
1267 free_netdev(netdev);
1269 pci_release_selected_regions(pdev, bars);
1271 if (!adapter || disable_dev)
1272 pci_disable_device(pdev);
1277 * e1000_remove - Device Removal Routine
1278 * @pdev: PCI device information struct
1280 * e1000_remove is called by the PCI subsystem to alert the driver
1281 * that it should release a PCI device. That could be caused by a
1282 * Hot-Plug event, or because the driver is going to be removed from
1285 static void e1000_remove(struct pci_dev *pdev)
1287 struct net_device *netdev = pci_get_drvdata(pdev);
1288 struct e1000_adapter *adapter = netdev_priv(netdev);
1289 struct e1000_hw *hw = &adapter->hw;
1292 e1000_down_and_stop(adapter);
1293 e1000_release_manageability(adapter);
1295 unregister_netdev(netdev);
1297 e1000_phy_hw_reset(hw);
1299 kfree(adapter->tx_ring);
1300 kfree(adapter->rx_ring);
1302 if (hw->mac_type == e1000_ce4100)
1303 iounmap(hw->ce4100_gbe_mdio_base_virt);
1304 iounmap(hw->hw_addr);
1305 if (hw->flash_address)
1306 iounmap(hw->flash_address);
1307 pci_release_selected_regions(pdev, adapter->bars);
1309 disable_dev = !test_and_set_bit(__E1000_DISABLED, &adapter->flags);
1310 free_netdev(netdev);
1313 pci_disable_device(pdev);
1317 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1318 * @adapter: board private structure to initialize
1320 * e1000_sw_init initializes the Adapter private data structure.
1321 * e1000_init_hw_struct MUST be called before this function
1323 static int e1000_sw_init(struct e1000_adapter *adapter)
1325 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1327 adapter->num_tx_queues = 1;
1328 adapter->num_rx_queues = 1;
1330 if (e1000_alloc_queues(adapter)) {
1331 e_err(probe, "Unable to allocate memory for queues\n");
1335 /* Explicitly disable IRQ since the NIC can be in any state. */
1336 e1000_irq_disable(adapter);
1338 spin_lock_init(&adapter->stats_lock);
1340 set_bit(__E1000_DOWN, &adapter->flags);
1346 * e1000_alloc_queues - Allocate memory for all rings
1347 * @adapter: board private structure to initialize
1349 * We allocate one ring per queue at run-time since we don't know the
1350 * number of queues at compile-time.
1352 static int e1000_alloc_queues(struct e1000_adapter *adapter)
1354 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1355 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1356 if (!adapter->tx_ring)
1359 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1360 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1361 if (!adapter->rx_ring) {
1362 kfree(adapter->tx_ring);
1366 return E1000_SUCCESS;
1370 * e1000_open - Called when a network interface is made active
1371 * @netdev: network interface device structure
1373 * Returns 0 on success, negative value on failure
1375 * The open entry point is called when a network interface is made
1376 * active by the system (IFF_UP). At this point all resources needed
1377 * for transmit and receive operations are allocated, the interrupt
1378 * handler is registered with the OS, the watchdog task is started,
1379 * and the stack is notified that the interface is ready.
1381 int e1000_open(struct net_device *netdev)
1383 struct e1000_adapter *adapter = netdev_priv(netdev);
1384 struct e1000_hw *hw = &adapter->hw;
1387 /* disallow open during test */
1388 if (test_bit(__E1000_TESTING, &adapter->flags))
1391 netif_carrier_off(netdev);
1393 /* allocate transmit descriptors */
1394 err = e1000_setup_all_tx_resources(adapter);
1398 /* allocate receive descriptors */
1399 err = e1000_setup_all_rx_resources(adapter);
1403 e1000_power_up_phy(adapter);
1405 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1406 if ((hw->mng_cookie.status &
1407 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1408 e1000_update_mng_vlan(adapter);
1411 /* before we allocate an interrupt, we must be ready to handle it.
1412 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1413 * as soon as we call pci_request_irq, so we have to setup our
1414 * clean_rx handler before we do so.
1416 e1000_configure(adapter);
1418 err = e1000_request_irq(adapter);
1422 /* From here on the code is the same as e1000_up() */
1423 clear_bit(__E1000_DOWN, &adapter->flags);
1425 napi_enable(&adapter->napi);
1427 e1000_irq_enable(adapter);
1429 netif_start_queue(netdev);
1431 /* fire a link status change interrupt to start the watchdog */
1432 ew32(ICS, E1000_ICS_LSC);
1434 return E1000_SUCCESS;
1437 e1000_power_down_phy(adapter);
1438 e1000_free_all_rx_resources(adapter);
1440 e1000_free_all_tx_resources(adapter);
1442 e1000_reset(adapter);
1448 * e1000_close - Disables a network interface
1449 * @netdev: network interface device structure
1451 * Returns 0, this is not allowed to fail
1453 * The close entry point is called when an interface is de-activated
1454 * by the OS. The hardware is still under the drivers control, but
1455 * needs to be disabled. A global MAC reset is issued to stop the
1456 * hardware, and all transmit and receive resources are freed.
1458 int e1000_close(struct net_device *netdev)
1460 struct e1000_adapter *adapter = netdev_priv(netdev);
1461 struct e1000_hw *hw = &adapter->hw;
1462 int count = E1000_CHECK_RESET_COUNT;
1464 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags) && count--)
1465 usleep_range(10000, 20000);
1469 /* signal that we're down so that the reset task will no longer run */
1470 set_bit(__E1000_DOWN, &adapter->flags);
1471 clear_bit(__E1000_RESETTING, &adapter->flags);
1473 e1000_down(adapter);
1474 e1000_power_down_phy(adapter);
1475 e1000_free_irq(adapter);
1477 e1000_free_all_tx_resources(adapter);
1478 e1000_free_all_rx_resources(adapter);
1480 /* kill manageability vlan ID if supported, but not if a vlan with
1481 * the same ID is registered on the host OS (let 8021q kill it)
1483 if ((hw->mng_cookie.status &
1484 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1485 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1486 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
1487 adapter->mng_vlan_id);
1494 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1495 * @adapter: address of board private structure
1496 * @start: address of beginning of memory
1497 * @len: length of memory
1499 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1502 struct e1000_hw *hw = &adapter->hw;
1503 unsigned long begin = (unsigned long)start;
1504 unsigned long end = begin + len;
1506 /* First rev 82545 and 82546 need to not allow any memory
1507 * write location to cross 64k boundary due to errata 23
1509 if (hw->mac_type == e1000_82545 ||
1510 hw->mac_type == e1000_ce4100 ||
1511 hw->mac_type == e1000_82546) {
1512 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1519 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1520 * @adapter: board private structure
1521 * @txdr: tx descriptor ring (for a specific queue) to setup
1523 * Return 0 on success, negative on failure
1525 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1526 struct e1000_tx_ring *txdr)
1528 struct pci_dev *pdev = adapter->pdev;
1531 size = sizeof(struct e1000_tx_buffer) * txdr->count;
1532 txdr->buffer_info = vzalloc(size);
1533 if (!txdr->buffer_info)
1536 /* round up to nearest 4K */
1538 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1539 txdr->size = ALIGN(txdr->size, 4096);
1541 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1545 vfree(txdr->buffer_info);
1549 /* Fix for errata 23, can't cross 64kB boundary */
1550 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1551 void *olddesc = txdr->desc;
1552 dma_addr_t olddma = txdr->dma;
1553 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1554 txdr->size, txdr->desc);
1555 /* Try again, without freeing the previous */
1556 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1557 &txdr->dma, GFP_KERNEL);
1558 /* Failed allocation, critical failure */
1560 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1562 goto setup_tx_desc_die;
1565 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1567 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1569 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1571 e_err(probe, "Unable to allocate aligned memory "
1572 "for the transmit descriptor ring\n");
1573 vfree(txdr->buffer_info);
1576 /* Free old allocation, new allocation was successful */
1577 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1581 memset(txdr->desc, 0, txdr->size);
1583 txdr->next_to_use = 0;
1584 txdr->next_to_clean = 0;
1590 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1591 * (Descriptors) for all queues
1592 * @adapter: board private structure
1594 * Return 0 on success, negative on failure
1596 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1600 for (i = 0; i < adapter->num_tx_queues; i++) {
1601 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1603 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1604 for (i-- ; i >= 0; i--)
1605 e1000_free_tx_resources(adapter,
1606 &adapter->tx_ring[i]);
1615 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1616 * @adapter: board private structure
1618 * Configure the Tx unit of the MAC after a reset.
1620 static void e1000_configure_tx(struct e1000_adapter *adapter)
1623 struct e1000_hw *hw = &adapter->hw;
1624 u32 tdlen, tctl, tipg;
1627 /* Setup the HW Tx Head and Tail descriptor pointers */
1629 switch (adapter->num_tx_queues) {
1632 tdba = adapter->tx_ring[0].dma;
1633 tdlen = adapter->tx_ring[0].count *
1634 sizeof(struct e1000_tx_desc);
1636 ew32(TDBAH, (tdba >> 32));
1637 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1640 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ?
1641 E1000_TDH : E1000_82542_TDH);
1642 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ?
1643 E1000_TDT : E1000_82542_TDT);
1647 /* Set the default values for the Tx Inter Packet Gap timer */
1648 if ((hw->media_type == e1000_media_type_fiber ||
1649 hw->media_type == e1000_media_type_internal_serdes))
1650 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1652 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1654 switch (hw->mac_type) {
1655 case e1000_82542_rev2_0:
1656 case e1000_82542_rev2_1:
1657 tipg = DEFAULT_82542_TIPG_IPGT;
1658 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1659 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1662 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1663 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1666 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1667 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1670 /* Set the Tx Interrupt Delay register */
1672 ew32(TIDV, adapter->tx_int_delay);
1673 if (hw->mac_type >= e1000_82540)
1674 ew32(TADV, adapter->tx_abs_int_delay);
1676 /* Program the Transmit Control Register */
1679 tctl &= ~E1000_TCTL_CT;
1680 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1681 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1683 e1000_config_collision_dist(hw);
1685 /* Setup Transmit Descriptor Settings for eop descriptor */
1686 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1688 /* only set IDE if we are delaying interrupts using the timers */
1689 if (adapter->tx_int_delay)
1690 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1692 if (hw->mac_type < e1000_82543)
1693 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1695 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1697 /* Cache if we're 82544 running in PCI-X because we'll
1698 * need this to apply a workaround later in the send path.
1700 if (hw->mac_type == e1000_82544 &&
1701 hw->bus_type == e1000_bus_type_pcix)
1702 adapter->pcix_82544 = true;
1709 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1710 * @adapter: board private structure
1711 * @rxdr: rx descriptor ring (for a specific queue) to setup
1713 * Returns 0 on success, negative on failure
1715 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1716 struct e1000_rx_ring *rxdr)
1718 struct pci_dev *pdev = adapter->pdev;
1721 size = sizeof(struct e1000_rx_buffer) * rxdr->count;
1722 rxdr->buffer_info = vzalloc(size);
1723 if (!rxdr->buffer_info)
1726 desc_len = sizeof(struct e1000_rx_desc);
1728 /* Round up to nearest 4K */
1730 rxdr->size = rxdr->count * desc_len;
1731 rxdr->size = ALIGN(rxdr->size, 4096);
1733 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1737 vfree(rxdr->buffer_info);
1741 /* Fix for errata 23, can't cross 64kB boundary */
1742 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1743 void *olddesc = rxdr->desc;
1744 dma_addr_t olddma = rxdr->dma;
1745 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1746 rxdr->size, rxdr->desc);
1747 /* Try again, without freeing the previous */
1748 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1749 &rxdr->dma, GFP_KERNEL);
1750 /* Failed allocation, critical failure */
1752 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1754 goto setup_rx_desc_die;
1757 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1759 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1761 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1763 e_err(probe, "Unable to allocate aligned memory for "
1764 "the Rx descriptor ring\n");
1765 goto setup_rx_desc_die;
1767 /* Free old allocation, new allocation was successful */
1768 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1772 memset(rxdr->desc, 0, rxdr->size);
1774 rxdr->next_to_clean = 0;
1775 rxdr->next_to_use = 0;
1776 rxdr->rx_skb_top = NULL;
1782 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1783 * (Descriptors) for all queues
1784 * @adapter: board private structure
1786 * Return 0 on success, negative on failure
1788 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1792 for (i = 0; i < adapter->num_rx_queues; i++) {
1793 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1795 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1796 for (i-- ; i >= 0; i--)
1797 e1000_free_rx_resources(adapter,
1798 &adapter->rx_ring[i]);
1807 * e1000_setup_rctl - configure the receive control registers
1808 * @adapter: Board private structure
1810 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1812 struct e1000_hw *hw = &adapter->hw;
1817 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1819 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1820 E1000_RCTL_RDMTS_HALF |
1821 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1823 if (hw->tbi_compatibility_on == 1)
1824 rctl |= E1000_RCTL_SBP;
1826 rctl &= ~E1000_RCTL_SBP;
1828 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1829 rctl &= ~E1000_RCTL_LPE;
1831 rctl |= E1000_RCTL_LPE;
1833 /* Setup buffer sizes */
1834 rctl &= ~E1000_RCTL_SZ_4096;
1835 rctl |= E1000_RCTL_BSEX;
1836 switch (adapter->rx_buffer_len) {
1837 case E1000_RXBUFFER_2048:
1839 rctl |= E1000_RCTL_SZ_2048;
1840 rctl &= ~E1000_RCTL_BSEX;
1842 case E1000_RXBUFFER_4096:
1843 rctl |= E1000_RCTL_SZ_4096;
1845 case E1000_RXBUFFER_8192:
1846 rctl |= E1000_RCTL_SZ_8192;
1848 case E1000_RXBUFFER_16384:
1849 rctl |= E1000_RCTL_SZ_16384;
1853 /* This is useful for sniffing bad packets. */
1854 if (adapter->netdev->features & NETIF_F_RXALL) {
1855 /* UPE and MPE will be handled by normal PROMISC logic
1856 * in e1000e_set_rx_mode
1858 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
1859 E1000_RCTL_BAM | /* RX All Bcast Pkts */
1860 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
1862 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
1863 E1000_RCTL_DPF | /* Allow filtered pause */
1864 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
1865 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1866 * and that breaks VLANs.
1874 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1875 * @adapter: board private structure
1877 * Configure the Rx unit of the MAC after a reset.
1879 static void e1000_configure_rx(struct e1000_adapter *adapter)
1882 struct e1000_hw *hw = &adapter->hw;
1883 u32 rdlen, rctl, rxcsum;
1885 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1886 rdlen = adapter->rx_ring[0].count *
1887 sizeof(struct e1000_rx_desc);
1888 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1889 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1891 rdlen = adapter->rx_ring[0].count *
1892 sizeof(struct e1000_rx_desc);
1893 adapter->clean_rx = e1000_clean_rx_irq;
1894 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1897 /* disable receives while setting up the descriptors */
1899 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1901 /* set the Receive Delay Timer Register */
1902 ew32(RDTR, adapter->rx_int_delay);
1904 if (hw->mac_type >= e1000_82540) {
1905 ew32(RADV, adapter->rx_abs_int_delay);
1906 if (adapter->itr_setting != 0)
1907 ew32(ITR, 1000000000 / (adapter->itr * 256));
1910 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1911 * the Base and Length of the Rx Descriptor Ring
1913 switch (adapter->num_rx_queues) {
1916 rdba = adapter->rx_ring[0].dma;
1918 ew32(RDBAH, (rdba >> 32));
1919 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1922 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ?
1923 E1000_RDH : E1000_82542_RDH);
1924 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ?
1925 E1000_RDT : E1000_82542_RDT);
1929 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1930 if (hw->mac_type >= e1000_82543) {
1931 rxcsum = er32(RXCSUM);
1932 if (adapter->rx_csum)
1933 rxcsum |= E1000_RXCSUM_TUOFL;
1935 /* don't need to clear IPPCSE as it defaults to 0 */
1936 rxcsum &= ~E1000_RXCSUM_TUOFL;
1937 ew32(RXCSUM, rxcsum);
1940 /* Enable Receives */
1941 ew32(RCTL, rctl | E1000_RCTL_EN);
1945 * e1000_free_tx_resources - Free Tx Resources per Queue
1946 * @adapter: board private structure
1947 * @tx_ring: Tx descriptor ring for a specific queue
1949 * Free all transmit software resources
1951 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1952 struct e1000_tx_ring *tx_ring)
1954 struct pci_dev *pdev = adapter->pdev;
1956 e1000_clean_tx_ring(adapter, tx_ring);
1958 vfree(tx_ring->buffer_info);
1959 tx_ring->buffer_info = NULL;
1961 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1964 tx_ring->desc = NULL;
1968 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1969 * @adapter: board private structure
1971 * Free all transmit software resources
1973 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1977 for (i = 0; i < adapter->num_tx_queues; i++)
1978 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1982 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1983 struct e1000_tx_buffer *buffer_info)
1985 if (buffer_info->dma) {
1986 if (buffer_info->mapped_as_page)
1987 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1988 buffer_info->length, DMA_TO_DEVICE);
1990 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1991 buffer_info->length,
1993 buffer_info->dma = 0;
1995 if (buffer_info->skb) {
1996 dev_kfree_skb_any(buffer_info->skb);
1997 buffer_info->skb = NULL;
1999 buffer_info->time_stamp = 0;
2000 /* buffer_info must be completely set up in the transmit path */
2004 * e1000_clean_tx_ring - Free Tx Buffers
2005 * @adapter: board private structure
2006 * @tx_ring: ring to be cleaned
2008 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
2009 struct e1000_tx_ring *tx_ring)
2011 struct e1000_hw *hw = &adapter->hw;
2012 struct e1000_tx_buffer *buffer_info;
2016 /* Free all the Tx ring sk_buffs */
2018 for (i = 0; i < tx_ring->count; i++) {
2019 buffer_info = &tx_ring->buffer_info[i];
2020 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2023 netdev_reset_queue(adapter->netdev);
2024 size = sizeof(struct e1000_tx_buffer) * tx_ring->count;
2025 memset(tx_ring->buffer_info, 0, size);
2027 /* Zero out the descriptor ring */
2029 memset(tx_ring->desc, 0, tx_ring->size);
2031 tx_ring->next_to_use = 0;
2032 tx_ring->next_to_clean = 0;
2033 tx_ring->last_tx_tso = false;
2035 writel(0, hw->hw_addr + tx_ring->tdh);
2036 writel(0, hw->hw_addr + tx_ring->tdt);
2040 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2041 * @adapter: board private structure
2043 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2047 for (i = 0; i < adapter->num_tx_queues; i++)
2048 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2052 * e1000_free_rx_resources - Free Rx Resources
2053 * @adapter: board private structure
2054 * @rx_ring: ring to clean the resources from
2056 * Free all receive software resources
2058 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2059 struct e1000_rx_ring *rx_ring)
2061 struct pci_dev *pdev = adapter->pdev;
2063 e1000_clean_rx_ring(adapter, rx_ring);
2065 vfree(rx_ring->buffer_info);
2066 rx_ring->buffer_info = NULL;
2068 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2071 rx_ring->desc = NULL;
2075 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2076 * @adapter: board private structure
2078 * Free all receive software resources
2080 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2084 for (i = 0; i < adapter->num_rx_queues; i++)
2085 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2088 #define E1000_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN)
2089 static unsigned int e1000_frag_len(const struct e1000_adapter *a)
2091 return SKB_DATA_ALIGN(a->rx_buffer_len + E1000_HEADROOM) +
2092 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
2095 static void *e1000_alloc_frag(const struct e1000_adapter *a)
2097 unsigned int len = e1000_frag_len(a);
2098 u8 *data = netdev_alloc_frag(len);
2101 data += E1000_HEADROOM;
2106 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2107 * @adapter: board private structure
2108 * @rx_ring: ring to free buffers from
2110 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2111 struct e1000_rx_ring *rx_ring)
2113 struct e1000_hw *hw = &adapter->hw;
2114 struct e1000_rx_buffer *buffer_info;
2115 struct pci_dev *pdev = adapter->pdev;
2119 /* Free all the Rx netfrags */
2120 for (i = 0; i < rx_ring->count; i++) {
2121 buffer_info = &rx_ring->buffer_info[i];
2122 if (adapter->clean_rx == e1000_clean_rx_irq) {
2123 if (buffer_info->dma)
2124 dma_unmap_single(&pdev->dev, buffer_info->dma,
2125 adapter->rx_buffer_len,
2127 if (buffer_info->rxbuf.data) {
2128 skb_free_frag(buffer_info->rxbuf.data);
2129 buffer_info->rxbuf.data = NULL;
2131 } else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2132 if (buffer_info->dma)
2133 dma_unmap_page(&pdev->dev, buffer_info->dma,
2134 adapter->rx_buffer_len,
2136 if (buffer_info->rxbuf.page) {
2137 put_page(buffer_info->rxbuf.page);
2138 buffer_info->rxbuf.page = NULL;
2142 buffer_info->dma = 0;
2145 /* there also may be some cached data from a chained receive */
2146 napi_free_frags(&adapter->napi);
2147 rx_ring->rx_skb_top = NULL;
2149 size = sizeof(struct e1000_rx_buffer) * rx_ring->count;
2150 memset(rx_ring->buffer_info, 0, size);
2152 /* Zero out the descriptor ring */
2153 memset(rx_ring->desc, 0, rx_ring->size);
2155 rx_ring->next_to_clean = 0;
2156 rx_ring->next_to_use = 0;
2158 writel(0, hw->hw_addr + rx_ring->rdh);
2159 writel(0, hw->hw_addr + rx_ring->rdt);
2163 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2164 * @adapter: board private structure
2166 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2170 for (i = 0; i < adapter->num_rx_queues; i++)
2171 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2174 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2175 * and memory write and invalidate disabled for certain operations
2177 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2179 struct e1000_hw *hw = &adapter->hw;
2180 struct net_device *netdev = adapter->netdev;
2183 e1000_pci_clear_mwi(hw);
2186 rctl |= E1000_RCTL_RST;
2188 E1000_WRITE_FLUSH();
2191 if (netif_running(netdev))
2192 e1000_clean_all_rx_rings(adapter);
2195 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2197 struct e1000_hw *hw = &adapter->hw;
2198 struct net_device *netdev = adapter->netdev;
2202 rctl &= ~E1000_RCTL_RST;
2204 E1000_WRITE_FLUSH();
2207 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2208 e1000_pci_set_mwi(hw);
2210 if (netif_running(netdev)) {
2211 /* No need to loop, because 82542 supports only 1 queue */
2212 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2213 e1000_configure_rx(adapter);
2214 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2219 * e1000_set_mac - Change the Ethernet Address of the NIC
2220 * @netdev: network interface device structure
2221 * @p: pointer to an address structure
2223 * Returns 0 on success, negative on failure
2225 static int e1000_set_mac(struct net_device *netdev, void *p)
2227 struct e1000_adapter *adapter = netdev_priv(netdev);
2228 struct e1000_hw *hw = &adapter->hw;
2229 struct sockaddr *addr = p;
2231 if (!is_valid_ether_addr(addr->sa_data))
2232 return -EADDRNOTAVAIL;
2234 /* 82542 2.0 needs to be in reset to write receive address registers */
2236 if (hw->mac_type == e1000_82542_rev2_0)
2237 e1000_enter_82542_rst(adapter);
2239 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2240 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2242 e1000_rar_set(hw, hw->mac_addr, 0);
2244 if (hw->mac_type == e1000_82542_rev2_0)
2245 e1000_leave_82542_rst(adapter);
2251 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2252 * @netdev: network interface device structure
2254 * The set_rx_mode entry point is called whenever the unicast or multicast
2255 * address lists or the network interface flags are updated. This routine is
2256 * responsible for configuring the hardware for proper unicast, multicast,
2257 * promiscuous mode, and all-multi behavior.
2259 static void e1000_set_rx_mode(struct net_device *netdev)
2261 struct e1000_adapter *adapter = netdev_priv(netdev);
2262 struct e1000_hw *hw = &adapter->hw;
2263 struct netdev_hw_addr *ha;
2264 bool use_uc = false;
2267 int i, rar_entries = E1000_RAR_ENTRIES;
2268 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2269 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2274 /* Check for Promiscuous and All Multicast modes */
2278 if (netdev->flags & IFF_PROMISC) {
2279 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2280 rctl &= ~E1000_RCTL_VFE;
2282 if (netdev->flags & IFF_ALLMULTI)
2283 rctl |= E1000_RCTL_MPE;
2285 rctl &= ~E1000_RCTL_MPE;
2286 /* Enable VLAN filter if there is a VLAN */
2287 if (e1000_vlan_used(adapter))
2288 rctl |= E1000_RCTL_VFE;
2291 if (netdev_uc_count(netdev) > rar_entries - 1) {
2292 rctl |= E1000_RCTL_UPE;
2293 } else if (!(netdev->flags & IFF_PROMISC)) {
2294 rctl &= ~E1000_RCTL_UPE;
2300 /* 82542 2.0 needs to be in reset to write receive address registers */
2302 if (hw->mac_type == e1000_82542_rev2_0)
2303 e1000_enter_82542_rst(adapter);
2305 /* load the first 14 addresses into the exact filters 1-14. Unicast
2306 * addresses take precedence to avoid disabling unicast filtering
2309 * RAR 0 is used for the station MAC address
2310 * if there are not 14 addresses, go ahead and clear the filters
2314 netdev_for_each_uc_addr(ha, netdev) {
2315 if (i == rar_entries)
2317 e1000_rar_set(hw, ha->addr, i++);
2320 netdev_for_each_mc_addr(ha, netdev) {
2321 if (i == rar_entries) {
2322 /* load any remaining addresses into the hash table */
2323 u32 hash_reg, hash_bit, mta;
2324 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2325 hash_reg = (hash_value >> 5) & 0x7F;
2326 hash_bit = hash_value & 0x1F;
2327 mta = (1 << hash_bit);
2328 mcarray[hash_reg] |= mta;
2330 e1000_rar_set(hw, ha->addr, i++);
2334 for (; i < rar_entries; i++) {
2335 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2336 E1000_WRITE_FLUSH();
2337 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2338 E1000_WRITE_FLUSH();
2341 /* write the hash table completely, write from bottom to avoid
2342 * both stupid write combining chipsets, and flushing each write
2344 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2345 /* If we are on an 82544 has an errata where writing odd
2346 * offsets overwrites the previous even offset, but writing
2347 * backwards over the range solves the issue by always
2348 * writing the odd offset first
2350 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2352 E1000_WRITE_FLUSH();
2354 if (hw->mac_type == e1000_82542_rev2_0)
2355 e1000_leave_82542_rst(adapter);
2361 * e1000_update_phy_info_task - get phy info
2362 * @work: work struct contained inside adapter struct
2364 * Need to wait a few seconds after link up to get diagnostic information from
2367 static void e1000_update_phy_info_task(struct work_struct *work)
2369 struct e1000_adapter *adapter = container_of(work,
2370 struct e1000_adapter,
2371 phy_info_task.work);
2373 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2377 * e1000_82547_tx_fifo_stall_task - task to complete work
2378 * @work: work struct contained inside adapter struct
2380 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2382 struct e1000_adapter *adapter = container_of(work,
2383 struct e1000_adapter,
2384 fifo_stall_task.work);
2385 struct e1000_hw *hw = &adapter->hw;
2386 struct net_device *netdev = adapter->netdev;
2389 if (atomic_read(&adapter->tx_fifo_stall)) {
2390 if ((er32(TDT) == er32(TDH)) &&
2391 (er32(TDFT) == er32(TDFH)) &&
2392 (er32(TDFTS) == er32(TDFHS))) {
2394 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2395 ew32(TDFT, adapter->tx_head_addr);
2396 ew32(TDFH, adapter->tx_head_addr);
2397 ew32(TDFTS, adapter->tx_head_addr);
2398 ew32(TDFHS, adapter->tx_head_addr);
2400 E1000_WRITE_FLUSH();
2402 adapter->tx_fifo_head = 0;
2403 atomic_set(&adapter->tx_fifo_stall, 0);
2404 netif_wake_queue(netdev);
2405 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2406 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2411 bool e1000_has_link(struct e1000_adapter *adapter)
2413 struct e1000_hw *hw = &adapter->hw;
2414 bool link_active = false;
2416 /* get_link_status is set on LSC (link status) interrupt or rx
2417 * sequence error interrupt (except on intel ce4100).
2418 * get_link_status will stay false until the
2419 * e1000_check_for_link establishes link for copper adapters
2422 switch (hw->media_type) {
2423 case e1000_media_type_copper:
2424 if (hw->mac_type == e1000_ce4100)
2425 hw->get_link_status = 1;
2426 if (hw->get_link_status) {
2427 e1000_check_for_link(hw);
2428 link_active = !hw->get_link_status;
2433 case e1000_media_type_fiber:
2434 e1000_check_for_link(hw);
2435 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2437 case e1000_media_type_internal_serdes:
2438 e1000_check_for_link(hw);
2439 link_active = hw->serdes_has_link;
2449 * e1000_watchdog - work function
2450 * @work: work struct contained inside adapter struct
2452 static void e1000_watchdog(struct work_struct *work)
2454 struct e1000_adapter *adapter = container_of(work,
2455 struct e1000_adapter,
2456 watchdog_task.work);
2457 struct e1000_hw *hw = &adapter->hw;
2458 struct net_device *netdev = adapter->netdev;
2459 struct e1000_tx_ring *txdr = adapter->tx_ring;
2462 link = e1000_has_link(adapter);
2463 if ((netif_carrier_ok(netdev)) && link)
2467 if (!netif_carrier_ok(netdev)) {
2470 /* update snapshot of PHY registers on LSC */
2471 e1000_get_speed_and_duplex(hw,
2472 &adapter->link_speed,
2473 &adapter->link_duplex);
2476 pr_info("%s NIC Link is Up %d Mbps %s, "
2477 "Flow Control: %s\n",
2479 adapter->link_speed,
2480 adapter->link_duplex == FULL_DUPLEX ?
2481 "Full Duplex" : "Half Duplex",
2482 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2483 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2484 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2485 E1000_CTRL_TFCE) ? "TX" : "None")));
2487 /* adjust timeout factor according to speed/duplex */
2488 adapter->tx_timeout_factor = 1;
2489 switch (adapter->link_speed) {
2492 adapter->tx_timeout_factor = 16;
2496 /* maybe add some timeout factor ? */
2500 /* enable transmits in the hardware */
2502 tctl |= E1000_TCTL_EN;
2505 netif_carrier_on(netdev);
2506 if (!test_bit(__E1000_DOWN, &adapter->flags))
2507 schedule_delayed_work(&adapter->phy_info_task,
2509 adapter->smartspeed = 0;
2512 if (netif_carrier_ok(netdev)) {
2513 adapter->link_speed = 0;
2514 adapter->link_duplex = 0;
2515 pr_info("%s NIC Link is Down\n",
2517 netif_carrier_off(netdev);
2519 if (!test_bit(__E1000_DOWN, &adapter->flags))
2520 schedule_delayed_work(&adapter->phy_info_task,
2524 e1000_smartspeed(adapter);
2528 e1000_update_stats(adapter);
2530 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2531 adapter->tpt_old = adapter->stats.tpt;
2532 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2533 adapter->colc_old = adapter->stats.colc;
2535 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2536 adapter->gorcl_old = adapter->stats.gorcl;
2537 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2538 adapter->gotcl_old = adapter->stats.gotcl;
2540 e1000_update_adaptive(hw);
2542 if (!netif_carrier_ok(netdev)) {
2543 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2544 /* We've lost link, so the controller stops DMA,
2545 * but we've got queued Tx work that's never going
2546 * to get done, so reset controller to flush Tx.
2547 * (Do the reset outside of interrupt context).
2549 adapter->tx_timeout_count++;
2550 schedule_work(&adapter->reset_task);
2551 /* exit immediately since reset is imminent */
2556 /* Simple mode for Interrupt Throttle Rate (ITR) */
2557 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2558 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2559 * Total asymmetrical Tx or Rx gets ITR=8000;
2560 * everyone else is between 2000-8000.
2562 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2563 u32 dif = (adapter->gotcl > adapter->gorcl ?
2564 adapter->gotcl - adapter->gorcl :
2565 adapter->gorcl - adapter->gotcl) / 10000;
2566 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2568 ew32(ITR, 1000000000 / (itr * 256));
2571 /* Cause software interrupt to ensure rx ring is cleaned */
2572 ew32(ICS, E1000_ICS_RXDMT0);
2574 /* Force detection of hung controller every watchdog period */
2575 adapter->detect_tx_hung = true;
2577 /* Reschedule the task */
2578 if (!test_bit(__E1000_DOWN, &adapter->flags))
2579 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2582 enum latency_range {
2586 latency_invalid = 255
2590 * e1000_update_itr - update the dynamic ITR value based on statistics
2591 * @adapter: pointer to adapter
2592 * @itr_setting: current adapter->itr
2593 * @packets: the number of packets during this measurement interval
2594 * @bytes: the number of bytes during this measurement interval
2596 * Stores a new ITR value based on packets and byte
2597 * counts during the last interrupt. The advantage of per interrupt
2598 * computation is faster updates and more accurate ITR for the current
2599 * traffic pattern. Constants in this function were computed
2600 * based on theoretical maximum wire speed and thresholds were set based
2601 * on testing data as well as attempting to minimize response time
2602 * while increasing bulk throughput.
2603 * this functionality is controlled by the InterruptThrottleRate module
2604 * parameter (see e1000_param.c)
2606 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2607 u16 itr_setting, int packets, int bytes)
2609 unsigned int retval = itr_setting;
2610 struct e1000_hw *hw = &adapter->hw;
2612 if (unlikely(hw->mac_type < e1000_82540))
2613 goto update_itr_done;
2616 goto update_itr_done;
2618 switch (itr_setting) {
2619 case lowest_latency:
2620 /* jumbo frames get bulk treatment*/
2621 if (bytes/packets > 8000)
2622 retval = bulk_latency;
2623 else if ((packets < 5) && (bytes > 512))
2624 retval = low_latency;
2626 case low_latency: /* 50 usec aka 20000 ints/s */
2627 if (bytes > 10000) {
2628 /* jumbo frames need bulk latency setting */
2629 if (bytes/packets > 8000)
2630 retval = bulk_latency;
2631 else if ((packets < 10) || ((bytes/packets) > 1200))
2632 retval = bulk_latency;
2633 else if ((packets > 35))
2634 retval = lowest_latency;
2635 } else if (bytes/packets > 2000)
2636 retval = bulk_latency;
2637 else if (packets <= 2 && bytes < 512)
2638 retval = lowest_latency;
2640 case bulk_latency: /* 250 usec aka 4000 ints/s */
2641 if (bytes > 25000) {
2643 retval = low_latency;
2644 } else if (bytes < 6000) {
2645 retval = low_latency;
2654 static void e1000_set_itr(struct e1000_adapter *adapter)
2656 struct e1000_hw *hw = &adapter->hw;
2658 u32 new_itr = adapter->itr;
2660 if (unlikely(hw->mac_type < e1000_82540))
2663 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2664 if (unlikely(adapter->link_speed != SPEED_1000)) {
2670 adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr,
2671 adapter->total_tx_packets,
2672 adapter->total_tx_bytes);
2673 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2674 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2675 adapter->tx_itr = low_latency;
2677 adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr,
2678 adapter->total_rx_packets,
2679 adapter->total_rx_bytes);
2680 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2681 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2682 adapter->rx_itr = low_latency;
2684 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2686 switch (current_itr) {
2687 /* counts and packets in update_itr are dependent on these numbers */
2688 case lowest_latency:
2692 new_itr = 20000; /* aka hwitr = ~200 */
2702 if (new_itr != adapter->itr) {
2703 /* this attempts to bias the interrupt rate towards Bulk
2704 * by adding intermediate steps when interrupt rate is
2707 new_itr = new_itr > adapter->itr ?
2708 min(adapter->itr + (new_itr >> 2), new_itr) :
2710 adapter->itr = new_itr;
2711 ew32(ITR, 1000000000 / (new_itr * 256));
2715 #define E1000_TX_FLAGS_CSUM 0x00000001
2716 #define E1000_TX_FLAGS_VLAN 0x00000002
2717 #define E1000_TX_FLAGS_TSO 0x00000004
2718 #define E1000_TX_FLAGS_IPV4 0x00000008
2719 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2720 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2721 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2723 static int e1000_tso(struct e1000_adapter *adapter,
2724 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2727 struct e1000_context_desc *context_desc;
2728 struct e1000_tx_buffer *buffer_info;
2731 u16 ipcse = 0, tucse, mss;
2732 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2734 if (skb_is_gso(skb)) {
2737 err = skb_cow_head(skb, 0);
2741 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2742 mss = skb_shinfo(skb)->gso_size;
2743 if (protocol == htons(ETH_P_IP)) {
2744 struct iphdr *iph = ip_hdr(skb);
2747 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2751 cmd_length = E1000_TXD_CMD_IP;
2752 ipcse = skb_transport_offset(skb) - 1;
2753 } else if (skb_is_gso_v6(skb)) {
2754 ipv6_hdr(skb)->payload_len = 0;
2755 tcp_hdr(skb)->check =
2756 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2757 &ipv6_hdr(skb)->daddr,
2761 ipcss = skb_network_offset(skb);
2762 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2763 tucss = skb_transport_offset(skb);
2764 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2767 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2768 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2770 i = tx_ring->next_to_use;
2771 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2772 buffer_info = &tx_ring->buffer_info[i];
2774 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2775 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2776 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2777 context_desc->upper_setup.tcp_fields.tucss = tucss;
2778 context_desc->upper_setup.tcp_fields.tucso = tucso;
2779 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2780 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2781 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2782 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2784 buffer_info->time_stamp = jiffies;
2785 buffer_info->next_to_watch = i;
2787 if (++i == tx_ring->count)
2790 tx_ring->next_to_use = i;
2797 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2798 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2801 struct e1000_context_desc *context_desc;
2802 struct e1000_tx_buffer *buffer_info;
2805 u32 cmd_len = E1000_TXD_CMD_DEXT;
2807 if (skb->ip_summed != CHECKSUM_PARTIAL)
2811 case cpu_to_be16(ETH_P_IP):
2812 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2813 cmd_len |= E1000_TXD_CMD_TCP;
2815 case cpu_to_be16(ETH_P_IPV6):
2816 /* XXX not handling all IPV6 headers */
2817 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2818 cmd_len |= E1000_TXD_CMD_TCP;
2821 if (unlikely(net_ratelimit()))
2822 e_warn(drv, "checksum_partial proto=%x!\n",
2827 css = skb_checksum_start_offset(skb);
2829 i = tx_ring->next_to_use;
2830 buffer_info = &tx_ring->buffer_info[i];
2831 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2833 context_desc->lower_setup.ip_config = 0;
2834 context_desc->upper_setup.tcp_fields.tucss = css;
2835 context_desc->upper_setup.tcp_fields.tucso =
2836 css + skb->csum_offset;
2837 context_desc->upper_setup.tcp_fields.tucse = 0;
2838 context_desc->tcp_seg_setup.data = 0;
2839 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2841 buffer_info->time_stamp = jiffies;
2842 buffer_info->next_to_watch = i;
2844 if (unlikely(++i == tx_ring->count))
2847 tx_ring->next_to_use = i;
2852 #define E1000_MAX_TXD_PWR 12
2853 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2855 static int e1000_tx_map(struct e1000_adapter *adapter,
2856 struct e1000_tx_ring *tx_ring,
2857 struct sk_buff *skb, unsigned int first,
2858 unsigned int max_per_txd, unsigned int nr_frags,
2861 struct e1000_hw *hw = &adapter->hw;
2862 struct pci_dev *pdev = adapter->pdev;
2863 struct e1000_tx_buffer *buffer_info;
2864 unsigned int len = skb_headlen(skb);
2865 unsigned int offset = 0, size, count = 0, i;
2866 unsigned int f, bytecount, segs;
2868 i = tx_ring->next_to_use;
2871 buffer_info = &tx_ring->buffer_info[i];
2872 size = min(len, max_per_txd);
2873 /* Workaround for Controller erratum --
2874 * descriptor for non-tso packet in a linear SKB that follows a
2875 * tso gets written back prematurely before the data is fully
2876 * DMA'd to the controller
2878 if (!skb->data_len && tx_ring->last_tx_tso &&
2880 tx_ring->last_tx_tso = false;
2884 /* Workaround for premature desc write-backs
2885 * in TSO mode. Append 4-byte sentinel desc
2887 if (unlikely(mss && !nr_frags && size == len && size > 8))
2889 /* work-around for errata 10 and it applies
2890 * to all controllers in PCI-X mode
2891 * The fix is to make sure that the first descriptor of a
2892 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2894 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2895 (size > 2015) && count == 0))
2898 /* Workaround for potential 82544 hang in PCI-X. Avoid
2899 * terminating buffers within evenly-aligned dwords.
2901 if (unlikely(adapter->pcix_82544 &&
2902 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2906 buffer_info->length = size;
2907 /* set time_stamp *before* dma to help avoid a possible race */
2908 buffer_info->time_stamp = jiffies;
2909 buffer_info->mapped_as_page = false;
2910 buffer_info->dma = dma_map_single(&pdev->dev,
2912 size, DMA_TO_DEVICE);
2913 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2915 buffer_info->next_to_watch = i;
2922 if (unlikely(i == tx_ring->count))
2927 for (f = 0; f < nr_frags; f++) {
2928 const struct skb_frag_struct *frag;
2930 frag = &skb_shinfo(skb)->frags[f];
2931 len = skb_frag_size(frag);
2935 unsigned long bufend;
2937 if (unlikely(i == tx_ring->count))
2940 buffer_info = &tx_ring->buffer_info[i];
2941 size = min(len, max_per_txd);
2942 /* Workaround for premature desc write-backs
2943 * in TSO mode. Append 4-byte sentinel desc
2945 if (unlikely(mss && f == (nr_frags-1) &&
2946 size == len && size > 8))
2948 /* Workaround for potential 82544 hang in PCI-X.
2949 * Avoid terminating buffers within evenly-aligned
2952 bufend = (unsigned long)
2953 page_to_phys(skb_frag_page(frag));
2954 bufend += offset + size - 1;
2955 if (unlikely(adapter->pcix_82544 &&
2960 buffer_info->length = size;
2961 buffer_info->time_stamp = jiffies;
2962 buffer_info->mapped_as_page = true;
2963 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2964 offset, size, DMA_TO_DEVICE);
2965 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2967 buffer_info->next_to_watch = i;
2975 segs = skb_shinfo(skb)->gso_segs ?: 1;
2976 /* multiply data chunks by size of headers */
2977 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2979 tx_ring->buffer_info[i].skb = skb;
2980 tx_ring->buffer_info[i].segs = segs;
2981 tx_ring->buffer_info[i].bytecount = bytecount;
2982 tx_ring->buffer_info[first].next_to_watch = i;
2987 dev_err(&pdev->dev, "TX DMA map failed\n");
2988 buffer_info->dma = 0;
2994 i += tx_ring->count;
2996 buffer_info = &tx_ring->buffer_info[i];
2997 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3003 static void e1000_tx_queue(struct e1000_adapter *adapter,
3004 struct e1000_tx_ring *tx_ring, int tx_flags,
3007 struct e1000_tx_desc *tx_desc = NULL;
3008 struct e1000_tx_buffer *buffer_info;
3009 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3012 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3013 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3015 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3017 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3018 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3021 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3022 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3023 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3026 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3027 txd_lower |= E1000_TXD_CMD_VLE;
3028 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3031 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3032 txd_lower &= ~(E1000_TXD_CMD_IFCS);
3034 i = tx_ring->next_to_use;
3037 buffer_info = &tx_ring->buffer_info[i];
3038 tx_desc = E1000_TX_DESC(*tx_ring, i);
3039 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3040 tx_desc->lower.data =
3041 cpu_to_le32(txd_lower | buffer_info->length);
3042 tx_desc->upper.data = cpu_to_le32(txd_upper);
3043 if (unlikely(++i == tx_ring->count))
3047 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3049 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3050 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3051 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3053 /* Force memory writes to complete before letting h/w
3054 * know there are new descriptors to fetch. (Only
3055 * applicable for weak-ordered memory model archs,
3060 tx_ring->next_to_use = i;
3063 /* 82547 workaround to avoid controller hang in half-duplex environment.
3064 * The workaround is to avoid queuing a large packet that would span
3065 * the internal Tx FIFO ring boundary by notifying the stack to resend
3066 * the packet at a later time. This gives the Tx FIFO an opportunity to
3067 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3068 * to the beginning of the Tx FIFO.
3071 #define E1000_FIFO_HDR 0x10
3072 #define E1000_82547_PAD_LEN 0x3E0
3074 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3075 struct sk_buff *skb)
3077 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3078 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3080 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3082 if (adapter->link_duplex != HALF_DUPLEX)
3083 goto no_fifo_stall_required;
3085 if (atomic_read(&adapter->tx_fifo_stall))
3088 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3089 atomic_set(&adapter->tx_fifo_stall, 1);
3093 no_fifo_stall_required:
3094 adapter->tx_fifo_head += skb_fifo_len;
3095 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3096 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3100 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3102 struct e1000_adapter *adapter = netdev_priv(netdev);
3103 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3105 netif_stop_queue(netdev);
3106 /* Herbert's original patch had:
3107 * smp_mb__after_netif_stop_queue();
3108 * but since that doesn't exist yet, just open code it.
3112 /* We need to check again in a case another CPU has just
3113 * made room available.
3115 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3119 netif_start_queue(netdev);
3120 ++adapter->restart_queue;
3124 static int e1000_maybe_stop_tx(struct net_device *netdev,
3125 struct e1000_tx_ring *tx_ring, int size)
3127 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3129 return __e1000_maybe_stop_tx(netdev, size);
3132 #define TXD_USE_COUNT(S, X) (((S) + ((1 << (X)) - 1)) >> (X))
3133 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3134 struct net_device *netdev)
3136 struct e1000_adapter *adapter = netdev_priv(netdev);
3137 struct e1000_hw *hw = &adapter->hw;
3138 struct e1000_tx_ring *tx_ring;
3139 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3140 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3141 unsigned int tx_flags = 0;
3142 unsigned int len = skb_headlen(skb);
3143 unsigned int nr_frags;
3148 __be16 protocol = vlan_get_protocol(skb);
3150 /* This goes back to the question of how to logically map a Tx queue
3151 * to a flow. Right now, performance is impacted slightly negatively
3152 * if using multiple Tx queues. If the stack breaks away from a
3153 * single qdisc implementation, we can look at this again.
3155 tx_ring = adapter->tx_ring;
3157 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3158 * packets may get corrupted during padding by HW.
3159 * To WA this issue, pad all small packets manually.
3161 if (eth_skb_pad(skb))
3162 return NETDEV_TX_OK;
3164 mss = skb_shinfo(skb)->gso_size;
3165 /* The controller does a simple calculation to
3166 * make sure there is enough room in the FIFO before
3167 * initiating the DMA for each buffer. The calc is:
3168 * 4 = ceil(buffer len/mss). To make sure we don't
3169 * overrun the FIFO, adjust the max buffer len if mss
3174 max_per_txd = min(mss << 2, max_per_txd);
3175 max_txd_pwr = fls(max_per_txd) - 1;
3177 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3178 if (skb->data_len && hdr_len == len) {
3179 switch (hw->mac_type) {
3181 unsigned int pull_size;
3183 /* Make sure we have room to chop off 4 bytes,
3184 * and that the end alignment will work out to
3185 * this hardware's requirements
3186 * NOTE: this is a TSO only workaround
3187 * if end byte alignment not correct move us
3188 * into the next dword
3190 if ((unsigned long)(skb_tail_pointer(skb) - 1)
3194 pull_size = min((unsigned int)4, skb->data_len);
3195 if (!__pskb_pull_tail(skb, pull_size)) {
3196 e_err(drv, "__pskb_pull_tail "
3198 dev_kfree_skb_any(skb);
3199 return NETDEV_TX_OK;
3201 len = skb_headlen(skb);
3211 /* reserve a descriptor for the offload context */
3212 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3216 /* Controller Erratum workaround */
3217 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3220 count += TXD_USE_COUNT(len, max_txd_pwr);
3222 if (adapter->pcix_82544)
3225 /* work-around for errata 10 and it applies to all controllers
3226 * in PCI-X mode, so add one more descriptor to the count
3228 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3232 nr_frags = skb_shinfo(skb)->nr_frags;
3233 for (f = 0; f < nr_frags; f++)
3234 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3236 if (adapter->pcix_82544)
3239 /* need: count + 2 desc gap to keep tail from touching
3240 * head, otherwise try next time
3242 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3243 return NETDEV_TX_BUSY;
3245 if (unlikely((hw->mac_type == e1000_82547) &&
3246 (e1000_82547_fifo_workaround(adapter, skb)))) {
3247 netif_stop_queue(netdev);
3248 if (!test_bit(__E1000_DOWN, &adapter->flags))
3249 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3250 return NETDEV_TX_BUSY;
3253 if (skb_vlan_tag_present(skb)) {
3254 tx_flags |= E1000_TX_FLAGS_VLAN;
3255 tx_flags |= (skb_vlan_tag_get(skb) <<
3256 E1000_TX_FLAGS_VLAN_SHIFT);
3259 first = tx_ring->next_to_use;
3261 tso = e1000_tso(adapter, tx_ring, skb, protocol);
3263 dev_kfree_skb_any(skb);
3264 return NETDEV_TX_OK;
3268 if (likely(hw->mac_type != e1000_82544))
3269 tx_ring->last_tx_tso = true;
3270 tx_flags |= E1000_TX_FLAGS_TSO;
3271 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb, protocol)))
3272 tx_flags |= E1000_TX_FLAGS_CSUM;
3274 if (protocol == htons(ETH_P_IP))
3275 tx_flags |= E1000_TX_FLAGS_IPV4;
3277 if (unlikely(skb->no_fcs))
3278 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3280 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3284 /* The descriptors needed is higher than other Intel drivers
3285 * due to a number of workarounds. The breakdown is below:
3286 * Data descriptors: MAX_SKB_FRAGS + 1
3287 * Context Descriptor: 1
3288 * Keep head from touching tail: 2
3291 int desc_needed = MAX_SKB_FRAGS + 7;
3293 netdev_sent_queue(netdev, skb->len);
3294 skb_tx_timestamp(skb);
3296 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3298 /* 82544 potentially requires twice as many data descriptors
3299 * in order to guarantee buffers don't end on evenly-aligned
3302 if (adapter->pcix_82544)
3303 desc_needed += MAX_SKB_FRAGS + 1;
3305 /* Make sure there is space in the ring for the next send. */
3306 e1000_maybe_stop_tx(netdev, tx_ring, desc_needed);
3308 if (!skb->xmit_more ||
3309 netif_xmit_stopped(netdev_get_tx_queue(netdev, 0))) {
3310 writel(tx_ring->next_to_use, hw->hw_addr + tx_ring->tdt);
3311 /* we need this if more than one processor can write to
3312 * our tail at a time, it synchronizes IO on IA64/Altix
3318 dev_kfree_skb_any(skb);
3319 tx_ring->buffer_info[first].time_stamp = 0;
3320 tx_ring->next_to_use = first;
3323 return NETDEV_TX_OK;
3326 #define NUM_REGS 38 /* 1 based count */
3327 static void e1000_regdump(struct e1000_adapter *adapter)
3329 struct e1000_hw *hw = &adapter->hw;
3331 u32 *regs_buff = regs;
3334 static const char * const reg_name[] = {
3336 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3337 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3338 "TIDV", "TXDCTL", "TADV", "TARC0",
3339 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3341 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3342 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3343 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3346 regs_buff[0] = er32(CTRL);
3347 regs_buff[1] = er32(STATUS);
3349 regs_buff[2] = er32(RCTL);
3350 regs_buff[3] = er32(RDLEN);
3351 regs_buff[4] = er32(RDH);
3352 regs_buff[5] = er32(RDT);
3353 regs_buff[6] = er32(RDTR);
3355 regs_buff[7] = er32(TCTL);
3356 regs_buff[8] = er32(TDBAL);
3357 regs_buff[9] = er32(TDBAH);
3358 regs_buff[10] = er32(TDLEN);
3359 regs_buff[11] = er32(TDH);
3360 regs_buff[12] = er32(TDT);
3361 regs_buff[13] = er32(TIDV);
3362 regs_buff[14] = er32(TXDCTL);
3363 regs_buff[15] = er32(TADV);
3364 regs_buff[16] = er32(TARC0);
3366 regs_buff[17] = er32(TDBAL1);
3367 regs_buff[18] = er32(TDBAH1);
3368 regs_buff[19] = er32(TDLEN1);
3369 regs_buff[20] = er32(TDH1);
3370 regs_buff[21] = er32(TDT1);
3371 regs_buff[22] = er32(TXDCTL1);
3372 regs_buff[23] = er32(TARC1);
3373 regs_buff[24] = er32(CTRL_EXT);
3374 regs_buff[25] = er32(ERT);
3375 regs_buff[26] = er32(RDBAL0);
3376 regs_buff[27] = er32(RDBAH0);
3377 regs_buff[28] = er32(TDFH);
3378 regs_buff[29] = er32(TDFT);
3379 regs_buff[30] = er32(TDFHS);
3380 regs_buff[31] = er32(TDFTS);
3381 regs_buff[32] = er32(TDFPC);
3382 regs_buff[33] = er32(RDFH);
3383 regs_buff[34] = er32(RDFT);
3384 regs_buff[35] = er32(RDFHS);
3385 regs_buff[36] = er32(RDFTS);
3386 regs_buff[37] = er32(RDFPC);
3388 pr_info("Register dump\n");
3389 for (i = 0; i < NUM_REGS; i++)
3390 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3394 * e1000_dump: Print registers, tx ring and rx ring
3396 static void e1000_dump(struct e1000_adapter *adapter)
3398 /* this code doesn't handle multiple rings */
3399 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3400 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3403 if (!netif_msg_hw(adapter))
3406 /* Print Registers */
3407 e1000_regdump(adapter);
3410 pr_info("TX Desc ring0 dump\n");
3412 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3414 * Legacy Transmit Descriptor
3415 * +--------------------------------------------------------------+
3416 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3417 * +--------------------------------------------------------------+
3418 * 8 | Special | CSS | Status | CMD | CSO | Length |
3419 * +--------------------------------------------------------------+
3420 * 63 48 47 36 35 32 31 24 23 16 15 0
3422 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3423 * 63 48 47 40 39 32 31 16 15 8 7 0
3424 * +----------------------------------------------------------------+
3425 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3426 * +----------------------------------------------------------------+
3427 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3428 * +----------------------------------------------------------------+
3429 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3431 * Extended Data Descriptor (DTYP=0x1)
3432 * +----------------------------------------------------------------+
3433 * 0 | Buffer Address [63:0] |
3434 * +----------------------------------------------------------------+
3435 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3436 * +----------------------------------------------------------------+
3437 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3439 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3440 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3442 if (!netif_msg_tx_done(adapter))
3443 goto rx_ring_summary;
3445 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3446 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3447 struct e1000_tx_buffer *buffer_info = &tx_ring->buffer_info[i];
3448 struct my_u { __le64 a; __le64 b; };
3449 struct my_u *u = (struct my_u *)tx_desc;
3452 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3454 else if (i == tx_ring->next_to_use)
3456 else if (i == tx_ring->next_to_clean)
3461 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3462 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3463 le64_to_cpu(u->a), le64_to_cpu(u->b),
3464 (u64)buffer_info->dma, buffer_info->length,
3465 buffer_info->next_to_watch,
3466 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3471 pr_info("\nRX Desc ring dump\n");
3473 /* Legacy Receive Descriptor Format
3475 * +-----------------------------------------------------+
3476 * | Buffer Address [63:0] |
3477 * +-----------------------------------------------------+
3478 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3479 * +-----------------------------------------------------+
3480 * 63 48 47 40 39 32 31 16 15 0
3482 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3484 if (!netif_msg_rx_status(adapter))
3487 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3488 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3489 struct e1000_rx_buffer *buffer_info = &rx_ring->buffer_info[i];
3490 struct my_u { __le64 a; __le64 b; };
3491 struct my_u *u = (struct my_u *)rx_desc;
3494 if (i == rx_ring->next_to_use)
3496 else if (i == rx_ring->next_to_clean)
3501 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3502 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3503 (u64)buffer_info->dma, buffer_info->rxbuf.data, type);
3506 /* dump the descriptor caches */
3508 pr_info("Rx descriptor cache in 64bit format\n");
3509 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3510 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3512 readl(adapter->hw.hw_addr + i+4),
3513 readl(adapter->hw.hw_addr + i),
3514 readl(adapter->hw.hw_addr + i+12),
3515 readl(adapter->hw.hw_addr + i+8));
3518 pr_info("Tx descriptor cache in 64bit format\n");
3519 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3520 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3522 readl(adapter->hw.hw_addr + i+4),
3523 readl(adapter->hw.hw_addr + i),
3524 readl(adapter->hw.hw_addr + i+12),
3525 readl(adapter->hw.hw_addr + i+8));
3532 * e1000_tx_timeout - Respond to a Tx Hang
3533 * @netdev: network interface device structure
3535 static void e1000_tx_timeout(struct net_device *netdev)
3537 struct e1000_adapter *adapter = netdev_priv(netdev);
3539 /* Do the reset outside of interrupt context */
3540 adapter->tx_timeout_count++;
3541 schedule_work(&adapter->reset_task);
3544 static void e1000_reset_task(struct work_struct *work)
3546 struct e1000_adapter *adapter =
3547 container_of(work, struct e1000_adapter, reset_task);
3549 e_err(drv, "Reset adapter\n");
3550 e1000_reinit_locked(adapter);
3554 * e1000_get_stats - Get System Network Statistics
3555 * @netdev: network interface device structure
3557 * Returns the address of the device statistics structure.
3558 * The statistics are actually updated from the watchdog.
3560 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3562 /* only return the current stats */
3563 return &netdev->stats;
3567 * e1000_change_mtu - Change the Maximum Transfer Unit
3568 * @netdev: network interface device structure
3569 * @new_mtu: new value for maximum frame size
3571 * Returns 0 on success, negative on failure
3573 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3575 struct e1000_adapter *adapter = netdev_priv(netdev);
3576 struct e1000_hw *hw = &adapter->hw;
3577 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3579 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3580 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3581 e_err(probe, "Invalid MTU setting\n");
3585 /* Adapter-specific max frame size limits. */
3586 switch (hw->mac_type) {
3587 case e1000_undefined ... e1000_82542_rev2_1:
3588 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3589 e_err(probe, "Jumbo Frames not supported.\n");
3594 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3598 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3600 /* e1000_down has a dependency on max_frame_size */
3601 hw->max_frame_size = max_frame;
3602 if (netif_running(netdev)) {
3603 /* prevent buffers from being reallocated */
3604 adapter->alloc_rx_buf = e1000_alloc_dummy_rx_buffers;
3605 e1000_down(adapter);
3608 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3609 * means we reserve 2 more, this pushes us to allocate from the next
3611 * i.e. RXBUFFER_2048 --> size-4096 slab
3612 * however with the new *_jumbo_rx* routines, jumbo receives will use
3616 if (max_frame <= E1000_RXBUFFER_2048)
3617 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3619 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3620 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3621 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3622 adapter->rx_buffer_len = PAGE_SIZE;
3625 /* adjust allocation if LPE protects us, and we aren't using SBP */
3626 if (!hw->tbi_compatibility_on &&
3627 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3628 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3629 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3631 pr_info("%s changing MTU from %d to %d\n",
3632 netdev->name, netdev->mtu, new_mtu);
3633 netdev->mtu = new_mtu;
3635 if (netif_running(netdev))
3638 e1000_reset(adapter);
3640 clear_bit(__E1000_RESETTING, &adapter->flags);
3646 * e1000_update_stats - Update the board statistics counters
3647 * @adapter: board private structure
3649 void e1000_update_stats(struct e1000_adapter *adapter)
3651 struct net_device *netdev = adapter->netdev;
3652 struct e1000_hw *hw = &adapter->hw;
3653 struct pci_dev *pdev = adapter->pdev;
3654 unsigned long flags;
3657 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3659 /* Prevent stats update while adapter is being reset, or if the pci
3660 * connection is down.
3662 if (adapter->link_speed == 0)
3664 if (pci_channel_offline(pdev))
3667 spin_lock_irqsave(&adapter->stats_lock, flags);
3669 /* these counters are modified from e1000_tbi_adjust_stats,
3670 * called from the interrupt context, so they must only
3671 * be written while holding adapter->stats_lock
3674 adapter->stats.crcerrs += er32(CRCERRS);
3675 adapter->stats.gprc += er32(GPRC);
3676 adapter->stats.gorcl += er32(GORCL);
3677 adapter->stats.gorch += er32(GORCH);
3678 adapter->stats.bprc += er32(BPRC);
3679 adapter->stats.mprc += er32(MPRC);
3680 adapter->stats.roc += er32(ROC);
3682 adapter->stats.prc64 += er32(PRC64);
3683 adapter->stats.prc127 += er32(PRC127);
3684 adapter->stats.prc255 += er32(PRC255);
3685 adapter->stats.prc511 += er32(PRC511);
3686 adapter->stats.prc1023 += er32(PRC1023);
3687 adapter->stats.prc1522 += er32(PRC1522);
3689 adapter->stats.symerrs += er32(SYMERRS);
3690 adapter->stats.mpc += er32(MPC);
3691 adapter->stats.scc += er32(SCC);
3692 adapter->stats.ecol += er32(ECOL);
3693 adapter->stats.mcc += er32(MCC);
3694 adapter->stats.latecol += er32(LATECOL);
3695 adapter->stats.dc += er32(DC);
3696 adapter->stats.sec += er32(SEC);
3697 adapter->stats.rlec += er32(RLEC);
3698 adapter->stats.xonrxc += er32(XONRXC);
3699 adapter->stats.xontxc += er32(XONTXC);
3700 adapter->stats.xoffrxc += er32(XOFFRXC);
3701 adapter->stats.xofftxc += er32(XOFFTXC);
3702 adapter->stats.fcruc += er32(FCRUC);
3703 adapter->stats.gptc += er32(GPTC);
3704 adapter->stats.gotcl += er32(GOTCL);
3705 adapter->stats.gotch += er32(GOTCH);
3706 adapter->stats.rnbc += er32(RNBC);
3707 adapter->stats.ruc += er32(RUC);
3708 adapter->stats.rfc += er32(RFC);
3709 adapter->stats.rjc += er32(RJC);
3710 adapter->stats.torl += er32(TORL);
3711 adapter->stats.torh += er32(TORH);
3712 adapter->stats.totl += er32(TOTL);
3713 adapter->stats.toth += er32(TOTH);
3714 adapter->stats.tpr += er32(TPR);
3716 adapter->stats.ptc64 += er32(PTC64);
3717 adapter->stats.ptc127 += er32(PTC127);
3718 adapter->stats.ptc255 += er32(PTC255);
3719 adapter->stats.ptc511 += er32(PTC511);
3720 adapter->stats.ptc1023 += er32(PTC1023);
3721 adapter->stats.ptc1522 += er32(PTC1522);
3723 adapter->stats.mptc += er32(MPTC);
3724 adapter->stats.bptc += er32(BPTC);
3726 /* used for adaptive IFS */
3728 hw->tx_packet_delta = er32(TPT);
3729 adapter->stats.tpt += hw->tx_packet_delta;
3730 hw->collision_delta = er32(COLC);
3731 adapter->stats.colc += hw->collision_delta;
3733 if (hw->mac_type >= e1000_82543) {
3734 adapter->stats.algnerrc += er32(ALGNERRC);
3735 adapter->stats.rxerrc += er32(RXERRC);
3736 adapter->stats.tncrs += er32(TNCRS);
3737 adapter->stats.cexterr += er32(CEXTERR);
3738 adapter->stats.tsctc += er32(TSCTC);
3739 adapter->stats.tsctfc += er32(TSCTFC);
3742 /* Fill out the OS statistics structure */
3743 netdev->stats.multicast = adapter->stats.mprc;
3744 netdev->stats.collisions = adapter->stats.colc;
3748 /* RLEC on some newer hardware can be incorrect so build
3749 * our own version based on RUC and ROC
3751 netdev->stats.rx_errors = adapter->stats.rxerrc +
3752 adapter->stats.crcerrs + adapter->stats.algnerrc +
3753 adapter->stats.ruc + adapter->stats.roc +
3754 adapter->stats.cexterr;
3755 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3756 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3757 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3758 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3759 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3762 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3763 netdev->stats.tx_errors = adapter->stats.txerrc;
3764 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3765 netdev->stats.tx_window_errors = adapter->stats.latecol;
3766 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3767 if (hw->bad_tx_carr_stats_fd &&
3768 adapter->link_duplex == FULL_DUPLEX) {
3769 netdev->stats.tx_carrier_errors = 0;
3770 adapter->stats.tncrs = 0;
3773 /* Tx Dropped needs to be maintained elsewhere */
3776 if (hw->media_type == e1000_media_type_copper) {
3777 if ((adapter->link_speed == SPEED_1000) &&
3778 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3779 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3780 adapter->phy_stats.idle_errors += phy_tmp;
3783 if ((hw->mac_type <= e1000_82546) &&
3784 (hw->phy_type == e1000_phy_m88) &&
3785 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3786 adapter->phy_stats.receive_errors += phy_tmp;
3789 /* Management Stats */
3790 if (hw->has_smbus) {
3791 adapter->stats.mgptc += er32(MGTPTC);
3792 adapter->stats.mgprc += er32(MGTPRC);
3793 adapter->stats.mgpdc += er32(MGTPDC);
3796 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3800 * e1000_intr - Interrupt Handler
3801 * @irq: interrupt number
3802 * @data: pointer to a network interface device structure
3804 static irqreturn_t e1000_intr(int irq, void *data)
3806 struct net_device *netdev = data;
3807 struct e1000_adapter *adapter = netdev_priv(netdev);
3808 struct e1000_hw *hw = &adapter->hw;
3809 u32 icr = er32(ICR);
3811 if (unlikely((!icr)))
3812 return IRQ_NONE; /* Not our interrupt */
3814 /* we might have caused the interrupt, but the above
3815 * read cleared it, and just in case the driver is
3816 * down there is nothing to do so return handled
3818 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3821 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3822 hw->get_link_status = 1;
3823 /* guard against interrupt when we're going down */
3824 if (!test_bit(__E1000_DOWN, &adapter->flags))
3825 schedule_delayed_work(&adapter->watchdog_task, 1);
3828 /* disable interrupts, without the synchronize_irq bit */
3830 E1000_WRITE_FLUSH();
3832 if (likely(napi_schedule_prep(&adapter->napi))) {
3833 adapter->total_tx_bytes = 0;
3834 adapter->total_tx_packets = 0;
3835 adapter->total_rx_bytes = 0;
3836 adapter->total_rx_packets = 0;
3837 __napi_schedule(&adapter->napi);
3839 /* this really should not happen! if it does it is basically a
3840 * bug, but not a hard error, so enable ints and continue
3842 if (!test_bit(__E1000_DOWN, &adapter->flags))
3843 e1000_irq_enable(adapter);
3850 * e1000_clean - NAPI Rx polling callback
3851 * @adapter: board private structure
3853 static int e1000_clean(struct napi_struct *napi, int budget)
3855 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
3857 int tx_clean_complete = 0, work_done = 0;
3859 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3861 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3863 if (!tx_clean_complete)
3866 /* If budget not fully consumed, exit the polling mode */
3867 if (work_done < budget) {
3868 if (likely(adapter->itr_setting & 3))
3869 e1000_set_itr(adapter);
3870 napi_complete_done(napi, work_done);
3871 if (!test_bit(__E1000_DOWN, &adapter->flags))
3872 e1000_irq_enable(adapter);
3879 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3880 * @adapter: board private structure
3882 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3883 struct e1000_tx_ring *tx_ring)
3885 struct e1000_hw *hw = &adapter->hw;
3886 struct net_device *netdev = adapter->netdev;
3887 struct e1000_tx_desc *tx_desc, *eop_desc;
3888 struct e1000_tx_buffer *buffer_info;
3889 unsigned int i, eop;
3890 unsigned int count = 0;
3891 unsigned int total_tx_bytes = 0, total_tx_packets = 0;
3892 unsigned int bytes_compl = 0, pkts_compl = 0;
3894 i = tx_ring->next_to_clean;
3895 eop = tx_ring->buffer_info[i].next_to_watch;
3896 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3898 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3899 (count < tx_ring->count)) {
3900 bool cleaned = false;
3901 dma_rmb(); /* read buffer_info after eop_desc */
3902 for ( ; !cleaned; count++) {
3903 tx_desc = E1000_TX_DESC(*tx_ring, i);
3904 buffer_info = &tx_ring->buffer_info[i];
3905 cleaned = (i == eop);
3908 total_tx_packets += buffer_info->segs;
3909 total_tx_bytes += buffer_info->bytecount;
3910 if (buffer_info->skb) {
3911 bytes_compl += buffer_info->skb->len;
3916 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3917 tx_desc->upper.data = 0;
3919 if (unlikely(++i == tx_ring->count))
3923 eop = tx_ring->buffer_info[i].next_to_watch;
3924 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3927 /* Synchronize with E1000_DESC_UNUSED called from e1000_xmit_frame,
3928 * which will reuse the cleaned buffers.
3930 smp_store_release(&tx_ring->next_to_clean, i);
3932 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
3934 #define TX_WAKE_THRESHOLD 32
3935 if (unlikely(count && netif_carrier_ok(netdev) &&
3936 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3937 /* Make sure that anybody stopping the queue after this
3938 * sees the new next_to_clean.
3942 if (netif_queue_stopped(netdev) &&
3943 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3944 netif_wake_queue(netdev);
3945 ++adapter->restart_queue;
3949 if (adapter->detect_tx_hung) {
3950 /* Detect a transmit hang in hardware, this serializes the
3951 * check with the clearing of time_stamp and movement of i
3953 adapter->detect_tx_hung = false;
3954 if (tx_ring->buffer_info[eop].time_stamp &&
3955 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3956 (adapter->tx_timeout_factor * HZ)) &&
3957 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3959 /* detected Tx unit hang */
3960 e_err(drv, "Detected Tx Unit Hang\n"
3964 " next_to_use <%x>\n"
3965 " next_to_clean <%x>\n"
3966 "buffer_info[next_to_clean]\n"
3967 " time_stamp <%lx>\n"
3968 " next_to_watch <%x>\n"
3970 " next_to_watch.status <%x>\n",
3971 (unsigned long)(tx_ring - adapter->tx_ring),
3972 readl(hw->hw_addr + tx_ring->tdh),
3973 readl(hw->hw_addr + tx_ring->tdt),
3974 tx_ring->next_to_use,
3975 tx_ring->next_to_clean,
3976 tx_ring->buffer_info[eop].time_stamp,
3979 eop_desc->upper.fields.status);
3980 e1000_dump(adapter);
3981 netif_stop_queue(netdev);
3984 adapter->total_tx_bytes += total_tx_bytes;
3985 adapter->total_tx_packets += total_tx_packets;
3986 netdev->stats.tx_bytes += total_tx_bytes;
3987 netdev->stats.tx_packets += total_tx_packets;
3988 return count < tx_ring->count;
3992 * e1000_rx_checksum - Receive Checksum Offload for 82543
3993 * @adapter: board private structure
3994 * @status_err: receive descriptor status and error fields
3995 * @csum: receive descriptor csum field
3996 * @sk_buff: socket buffer with received data
3998 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3999 u32 csum, struct sk_buff *skb)
4001 struct e1000_hw *hw = &adapter->hw;
4002 u16 status = (u16)status_err;
4003 u8 errors = (u8)(status_err >> 24);
4005 skb_checksum_none_assert(skb);
4007 /* 82543 or newer only */
4008 if (unlikely(hw->mac_type < e1000_82543))
4010 /* Ignore Checksum bit is set */
4011 if (unlikely(status & E1000_RXD_STAT_IXSM))
4013 /* TCP/UDP checksum error bit is set */
4014 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4015 /* let the stack verify checksum errors */
4016 adapter->hw_csum_err++;
4019 /* TCP/UDP Checksum has not been calculated */
4020 if (!(status & E1000_RXD_STAT_TCPCS))
4023 /* It must be a TCP or UDP packet with a valid checksum */
4024 if (likely(status & E1000_RXD_STAT_TCPCS)) {
4025 /* TCP checksum is good */
4026 skb->ip_summed = CHECKSUM_UNNECESSARY;
4028 adapter->hw_csum_good++;
4032 * e1000_consume_page - helper function for jumbo Rx path
4034 static void e1000_consume_page(struct e1000_rx_buffer *bi, struct sk_buff *skb,
4037 bi->rxbuf.page = NULL;
4039 skb->data_len += length;
4040 skb->truesize += PAGE_SIZE;
4044 * e1000_receive_skb - helper function to handle rx indications
4045 * @adapter: board private structure
4046 * @status: descriptor status field as written by hardware
4047 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
4048 * @skb: pointer to sk_buff to be indicated to stack
4050 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
4051 __le16 vlan, struct sk_buff *skb)
4053 skb->protocol = eth_type_trans(skb, adapter->netdev);
4055 if (status & E1000_RXD_STAT_VP) {
4056 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4058 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4060 napi_gro_receive(&adapter->napi, skb);
4064 * e1000_tbi_adjust_stats
4065 * @hw: Struct containing variables accessed by shared code
4066 * @frame_len: The length of the frame in question
4067 * @mac_addr: The Ethernet destination address of the frame in question
4069 * Adjusts the statistic counters when a frame is accepted by TBI_ACCEPT
4071 static void e1000_tbi_adjust_stats(struct e1000_hw *hw,
4072 struct e1000_hw_stats *stats,
4073 u32 frame_len, const u8 *mac_addr)
4077 /* First adjust the frame length. */
4079 /* We need to adjust the statistics counters, since the hardware
4080 * counters overcount this packet as a CRC error and undercount
4081 * the packet as a good packet
4083 /* This packet should not be counted as a CRC error. */
4085 /* This packet does count as a Good Packet Received. */
4088 /* Adjust the Good Octets received counters */
4089 carry_bit = 0x80000000 & stats->gorcl;
4090 stats->gorcl += frame_len;
4091 /* If the high bit of Gorcl (the low 32 bits of the Good Octets
4092 * Received Count) was one before the addition,
4093 * AND it is zero after, then we lost the carry out,
4094 * need to add one to Gorch (Good Octets Received Count High).
4095 * This could be simplified if all environments supported
4098 if (carry_bit && ((stats->gorcl & 0x80000000) == 0))
4100 /* Is this a broadcast or multicast? Check broadcast first,
4101 * since the test for a multicast frame will test positive on
4102 * a broadcast frame.
4104 if (is_broadcast_ether_addr(mac_addr))
4106 else if (is_multicast_ether_addr(mac_addr))
4109 if (frame_len == hw->max_frame_size) {
4110 /* In this case, the hardware has overcounted the number of
4117 /* Adjust the bin counters when the extra byte put the frame in the
4118 * wrong bin. Remember that the frame_len was adjusted above.
4120 if (frame_len == 64) {
4123 } else if (frame_len == 127) {
4126 } else if (frame_len == 255) {
4129 } else if (frame_len == 511) {
4132 } else if (frame_len == 1023) {
4135 } else if (frame_len == 1522) {
4140 static bool e1000_tbi_should_accept(struct e1000_adapter *adapter,
4141 u8 status, u8 errors,
4142 u32 length, const u8 *data)
4144 struct e1000_hw *hw = &adapter->hw;
4145 u8 last_byte = *(data + length - 1);
4147 if (TBI_ACCEPT(hw, status, errors, length, last_byte)) {
4148 unsigned long irq_flags;
4150 spin_lock_irqsave(&adapter->stats_lock, irq_flags);
4151 e1000_tbi_adjust_stats(hw, &adapter->stats, length, data);
4152 spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
4160 static struct sk_buff *e1000_alloc_rx_skb(struct e1000_adapter *adapter,
4163 struct sk_buff *skb = napi_alloc_skb(&adapter->napi, bufsz);
4166 adapter->alloc_rx_buff_failed++;
4171 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4172 * @adapter: board private structure
4173 * @rx_ring: ring to clean
4174 * @work_done: amount of napi work completed this call
4175 * @work_to_do: max amount of work allowed for this call to do
4177 * the return value indicates whether actual cleaning was done, there
4178 * is no guarantee that everything was cleaned
4180 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
4181 struct e1000_rx_ring *rx_ring,
4182 int *work_done, int work_to_do)
4184 struct net_device *netdev = adapter->netdev;
4185 struct pci_dev *pdev = adapter->pdev;
4186 struct e1000_rx_desc *rx_desc, *next_rxd;
4187 struct e1000_rx_buffer *buffer_info, *next_buffer;
4190 int cleaned_count = 0;
4191 bool cleaned = false;
4192 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
4194 i = rx_ring->next_to_clean;
4195 rx_desc = E1000_RX_DESC(*rx_ring, i);
4196 buffer_info = &rx_ring->buffer_info[i];
4198 while (rx_desc->status & E1000_RXD_STAT_DD) {
4199 struct sk_buff *skb;
4202 if (*work_done >= work_to_do)
4205 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */
4207 status = rx_desc->status;
4209 if (++i == rx_ring->count)
4212 next_rxd = E1000_RX_DESC(*rx_ring, i);
4215 next_buffer = &rx_ring->buffer_info[i];
4219 dma_unmap_page(&pdev->dev, buffer_info->dma,
4220 adapter->rx_buffer_len, DMA_FROM_DEVICE);
4221 buffer_info->dma = 0;
4223 length = le16_to_cpu(rx_desc->length);
4225 /* errors is only valid for DD + EOP descriptors */
4226 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4227 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4228 u8 *mapped = page_address(buffer_info->rxbuf.page);
4230 if (e1000_tbi_should_accept(adapter, status,
4234 } else if (netdev->features & NETIF_F_RXALL) {
4237 /* an error means any chain goes out the window
4240 if (rx_ring->rx_skb_top)
4241 dev_kfree_skb(rx_ring->rx_skb_top);
4242 rx_ring->rx_skb_top = NULL;
4247 #define rxtop rx_ring->rx_skb_top
4249 if (!(status & E1000_RXD_STAT_EOP)) {
4250 /* this descriptor is only the beginning (or middle) */
4252 /* this is the beginning of a chain */
4253 rxtop = napi_get_frags(&adapter->napi);
4257 skb_fill_page_desc(rxtop, 0,
4258 buffer_info->rxbuf.page,
4261 /* this is the middle of a chain */
4262 skb_fill_page_desc(rxtop,
4263 skb_shinfo(rxtop)->nr_frags,
4264 buffer_info->rxbuf.page, 0, length);
4266 e1000_consume_page(buffer_info, rxtop, length);
4270 /* end of the chain */
4271 skb_fill_page_desc(rxtop,
4272 skb_shinfo(rxtop)->nr_frags,
4273 buffer_info->rxbuf.page, 0, length);
4276 e1000_consume_page(buffer_info, skb, length);
4279 /* no chain, got EOP, this buf is the packet
4280 * copybreak to save the put_page/alloc_page
4282 p = buffer_info->rxbuf.page;
4283 if (length <= copybreak) {
4286 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4288 skb = e1000_alloc_rx_skb(adapter,
4293 vaddr = kmap_atomic(p);
4294 memcpy(skb_tail_pointer(skb), vaddr,
4296 kunmap_atomic(vaddr);
4297 /* re-use the page, so don't erase
4298 * buffer_info->rxbuf.page
4300 skb_put(skb, length);
4301 e1000_rx_checksum(adapter,
4302 status | rx_desc->errors << 24,
4303 le16_to_cpu(rx_desc->csum), skb);
4305 total_rx_bytes += skb->len;
4308 e1000_receive_skb(adapter, status,
4309 rx_desc->special, skb);
4312 skb = napi_get_frags(&adapter->napi);
4314 adapter->alloc_rx_buff_failed++;
4317 skb_fill_page_desc(skb, 0, p, 0,
4319 e1000_consume_page(buffer_info, skb,
4325 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4326 e1000_rx_checksum(adapter,
4328 ((u32)(rx_desc->errors) << 24),
4329 le16_to_cpu(rx_desc->csum), skb);
4331 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4332 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4333 pskb_trim(skb, skb->len - 4);
4336 if (status & E1000_RXD_STAT_VP) {
4337 __le16 vlan = rx_desc->special;
4338 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4340 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4343 napi_gro_frags(&adapter->napi);
4346 rx_desc->status = 0;
4348 /* return some buffers to hardware, one at a time is too slow */
4349 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4350 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4354 /* use prefetched values */
4356 buffer_info = next_buffer;
4358 rx_ring->next_to_clean = i;
4360 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4362 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4364 adapter->total_rx_packets += total_rx_packets;
4365 adapter->total_rx_bytes += total_rx_bytes;
4366 netdev->stats.rx_bytes += total_rx_bytes;
4367 netdev->stats.rx_packets += total_rx_packets;
4371 /* this should improve performance for small packets with large amounts
4372 * of reassembly being done in the stack
4374 static struct sk_buff *e1000_copybreak(struct e1000_adapter *adapter,
4375 struct e1000_rx_buffer *buffer_info,
4376 u32 length, const void *data)
4378 struct sk_buff *skb;
4380 if (length > copybreak)
4383 skb = e1000_alloc_rx_skb(adapter, length);
4387 dma_sync_single_for_cpu(&adapter->pdev->dev, buffer_info->dma,
4388 length, DMA_FROM_DEVICE);
4390 memcpy(skb_put(skb, length), data, length);
4396 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4397 * @adapter: board private structure
4398 * @rx_ring: ring to clean
4399 * @work_done: amount of napi work completed this call
4400 * @work_to_do: max amount of work allowed for this call to do
4402 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4403 struct e1000_rx_ring *rx_ring,
4404 int *work_done, int work_to_do)
4406 struct net_device *netdev = adapter->netdev;
4407 struct pci_dev *pdev = adapter->pdev;
4408 struct e1000_rx_desc *rx_desc, *next_rxd;
4409 struct e1000_rx_buffer *buffer_info, *next_buffer;
4412 int cleaned_count = 0;
4413 bool cleaned = false;
4414 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
4416 i = rx_ring->next_to_clean;
4417 rx_desc = E1000_RX_DESC(*rx_ring, i);
4418 buffer_info = &rx_ring->buffer_info[i];
4420 while (rx_desc->status & E1000_RXD_STAT_DD) {
4421 struct sk_buff *skb;
4425 if (*work_done >= work_to_do)
4428 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */
4430 status = rx_desc->status;
4431 length = le16_to_cpu(rx_desc->length);
4433 data = buffer_info->rxbuf.data;
4435 skb = e1000_copybreak(adapter, buffer_info, length, data);
4437 unsigned int frag_len = e1000_frag_len(adapter);
4439 skb = build_skb(data - E1000_HEADROOM, frag_len);
4441 adapter->alloc_rx_buff_failed++;
4445 skb_reserve(skb, E1000_HEADROOM);
4446 dma_unmap_single(&pdev->dev, buffer_info->dma,
4447 adapter->rx_buffer_len,
4449 buffer_info->dma = 0;
4450 buffer_info->rxbuf.data = NULL;
4453 if (++i == rx_ring->count)
4456 next_rxd = E1000_RX_DESC(*rx_ring, i);
4459 next_buffer = &rx_ring->buffer_info[i];
4464 /* !EOP means multiple descriptors were used to store a single
4465 * packet, if thats the case we need to toss it. In fact, we
4466 * to toss every packet with the EOP bit clear and the next
4467 * frame that _does_ have the EOP bit set, as it is by
4468 * definition only a frame fragment
4470 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4471 adapter->discarding = true;
4473 if (adapter->discarding) {
4474 /* All receives must fit into a single buffer */
4475 netdev_dbg(netdev, "Receive packet consumed multiple buffers\n");
4477 if (status & E1000_RXD_STAT_EOP)
4478 adapter->discarding = false;
4482 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4483 if (e1000_tbi_should_accept(adapter, status,
4487 } else if (netdev->features & NETIF_F_RXALL) {
4496 total_rx_bytes += (length - 4); /* don't count FCS */
4499 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4500 /* adjust length to remove Ethernet CRC, this must be
4501 * done after the TBI_ACCEPT workaround above
4505 if (buffer_info->rxbuf.data == NULL)
4506 skb_put(skb, length);
4507 else /* copybreak skb */
4508 skb_trim(skb, length);
4510 /* Receive Checksum Offload */
4511 e1000_rx_checksum(adapter,
4513 ((u32)(rx_desc->errors) << 24),
4514 le16_to_cpu(rx_desc->csum), skb);
4516 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4519 rx_desc->status = 0;
4521 /* return some buffers to hardware, one at a time is too slow */
4522 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4523 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4527 /* use prefetched values */
4529 buffer_info = next_buffer;
4531 rx_ring->next_to_clean = i;
4533 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4535 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4537 adapter->total_rx_packets += total_rx_packets;
4538 adapter->total_rx_bytes += total_rx_bytes;
4539 netdev->stats.rx_bytes += total_rx_bytes;
4540 netdev->stats.rx_packets += total_rx_packets;
4545 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4546 * @adapter: address of board private structure
4547 * @rx_ring: pointer to receive ring structure
4548 * @cleaned_count: number of buffers to allocate this pass
4551 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4552 struct e1000_rx_ring *rx_ring, int cleaned_count)
4554 struct pci_dev *pdev = adapter->pdev;
4555 struct e1000_rx_desc *rx_desc;
4556 struct e1000_rx_buffer *buffer_info;
4559 i = rx_ring->next_to_use;
4560 buffer_info = &rx_ring->buffer_info[i];
4562 while (cleaned_count--) {
4563 /* allocate a new page if necessary */
4564 if (!buffer_info->rxbuf.page) {
4565 buffer_info->rxbuf.page = alloc_page(GFP_ATOMIC);
4566 if (unlikely(!buffer_info->rxbuf.page)) {
4567 adapter->alloc_rx_buff_failed++;
4572 if (!buffer_info->dma) {
4573 buffer_info->dma = dma_map_page(&pdev->dev,
4574 buffer_info->rxbuf.page, 0,
4575 adapter->rx_buffer_len,
4577 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4578 put_page(buffer_info->rxbuf.page);
4579 buffer_info->rxbuf.page = NULL;
4580 buffer_info->dma = 0;
4581 adapter->alloc_rx_buff_failed++;
4586 rx_desc = E1000_RX_DESC(*rx_ring, i);
4587 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4589 if (unlikely(++i == rx_ring->count))
4591 buffer_info = &rx_ring->buffer_info[i];
4594 if (likely(rx_ring->next_to_use != i)) {
4595 rx_ring->next_to_use = i;
4596 if (unlikely(i-- == 0))
4597 i = (rx_ring->count - 1);
4599 /* Force memory writes to complete before letting h/w
4600 * know there are new descriptors to fetch. (Only
4601 * applicable for weak-ordered memory model archs,
4605 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4610 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4611 * @adapter: address of board private structure
4613 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4614 struct e1000_rx_ring *rx_ring,
4617 struct e1000_hw *hw = &adapter->hw;
4618 struct pci_dev *pdev = adapter->pdev;
4619 struct e1000_rx_desc *rx_desc;
4620 struct e1000_rx_buffer *buffer_info;
4622 unsigned int bufsz = adapter->rx_buffer_len;
4624 i = rx_ring->next_to_use;
4625 buffer_info = &rx_ring->buffer_info[i];
4627 while (cleaned_count--) {
4630 if (buffer_info->rxbuf.data)
4633 data = e1000_alloc_frag(adapter);
4635 /* Better luck next round */
4636 adapter->alloc_rx_buff_failed++;
4640 /* Fix for errata 23, can't cross 64kB boundary */
4641 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4642 void *olddata = data;
4643 e_err(rx_err, "skb align check failed: %u bytes at "
4644 "%p\n", bufsz, data);
4645 /* Try again, without freeing the previous */
4646 data = e1000_alloc_frag(adapter);
4647 /* Failed allocation, critical failure */
4649 skb_free_frag(olddata);
4650 adapter->alloc_rx_buff_failed++;
4654 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4656 skb_free_frag(data);
4657 skb_free_frag(olddata);
4658 adapter->alloc_rx_buff_failed++;
4662 /* Use new allocation */
4663 skb_free_frag(olddata);
4665 buffer_info->dma = dma_map_single(&pdev->dev,
4667 adapter->rx_buffer_len,
4669 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4670 skb_free_frag(data);
4671 buffer_info->dma = 0;
4672 adapter->alloc_rx_buff_failed++;
4676 /* XXX if it was allocated cleanly it will never map to a
4680 /* Fix for errata 23, can't cross 64kB boundary */
4681 if (!e1000_check_64k_bound(adapter,
4682 (void *)(unsigned long)buffer_info->dma,
4683 adapter->rx_buffer_len)) {
4684 e_err(rx_err, "dma align check failed: %u bytes at "
4685 "%p\n", adapter->rx_buffer_len,
4686 (void *)(unsigned long)buffer_info->dma);
4688 dma_unmap_single(&pdev->dev, buffer_info->dma,
4689 adapter->rx_buffer_len,
4692 skb_free_frag(data);
4693 buffer_info->rxbuf.data = NULL;
4694 buffer_info->dma = 0;
4696 adapter->alloc_rx_buff_failed++;
4699 buffer_info->rxbuf.data = data;
4701 rx_desc = E1000_RX_DESC(*rx_ring, i);
4702 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4704 if (unlikely(++i == rx_ring->count))
4706 buffer_info = &rx_ring->buffer_info[i];
4709 if (likely(rx_ring->next_to_use != i)) {
4710 rx_ring->next_to_use = i;
4711 if (unlikely(i-- == 0))
4712 i = (rx_ring->count - 1);
4714 /* Force memory writes to complete before letting h/w
4715 * know there are new descriptors to fetch. (Only
4716 * applicable for weak-ordered memory model archs,
4720 writel(i, hw->hw_addr + rx_ring->rdt);
4725 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4728 static void e1000_smartspeed(struct e1000_adapter *adapter)
4730 struct e1000_hw *hw = &adapter->hw;
4734 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4735 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4738 if (adapter->smartspeed == 0) {
4739 /* If Master/Slave config fault is asserted twice,
4740 * we assume back-to-back
4742 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4743 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT))
4745 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4746 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT))
4748 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4749 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4750 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4751 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4753 adapter->smartspeed++;
4754 if (!e1000_phy_setup_autoneg(hw) &&
4755 !e1000_read_phy_reg(hw, PHY_CTRL,
4757 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4758 MII_CR_RESTART_AUTO_NEG);
4759 e1000_write_phy_reg(hw, PHY_CTRL,
4764 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4765 /* If still no link, perhaps using 2/3 pair cable */
4766 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4767 phy_ctrl |= CR_1000T_MS_ENABLE;
4768 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4769 if (!e1000_phy_setup_autoneg(hw) &&
4770 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4771 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4772 MII_CR_RESTART_AUTO_NEG);
4773 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4776 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4777 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4778 adapter->smartspeed = 0;
4787 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4793 return e1000_mii_ioctl(netdev, ifr, cmd);
4805 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4808 struct e1000_adapter *adapter = netdev_priv(netdev);
4809 struct e1000_hw *hw = &adapter->hw;
4810 struct mii_ioctl_data *data = if_mii(ifr);
4813 unsigned long flags;
4815 if (hw->media_type != e1000_media_type_copper)
4820 data->phy_id = hw->phy_addr;
4823 spin_lock_irqsave(&adapter->stats_lock, flags);
4824 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4826 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4829 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4832 if (data->reg_num & ~(0x1F))
4834 mii_reg = data->val_in;
4835 spin_lock_irqsave(&adapter->stats_lock, flags);
4836 if (e1000_write_phy_reg(hw, data->reg_num,
4838 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4841 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4842 if (hw->media_type == e1000_media_type_copper) {
4843 switch (data->reg_num) {
4845 if (mii_reg & MII_CR_POWER_DOWN)
4847 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4849 hw->autoneg_advertised = 0x2F;
4854 else if (mii_reg & 0x2000)
4858 retval = e1000_set_spd_dplx(
4866 if (netif_running(adapter->netdev))
4867 e1000_reinit_locked(adapter);
4869 e1000_reset(adapter);
4871 case M88E1000_PHY_SPEC_CTRL:
4872 case M88E1000_EXT_PHY_SPEC_CTRL:
4873 if (e1000_phy_reset(hw))
4878 switch (data->reg_num) {
4880 if (mii_reg & MII_CR_POWER_DOWN)
4882 if (netif_running(adapter->netdev))
4883 e1000_reinit_locked(adapter);
4885 e1000_reset(adapter);
4893 return E1000_SUCCESS;
4896 void e1000_pci_set_mwi(struct e1000_hw *hw)
4898 struct e1000_adapter *adapter = hw->back;
4899 int ret_val = pci_set_mwi(adapter->pdev);
4902 e_err(probe, "Error in setting MWI\n");
4905 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4907 struct e1000_adapter *adapter = hw->back;
4909 pci_clear_mwi(adapter->pdev);
4912 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4914 struct e1000_adapter *adapter = hw->back;
4915 return pcix_get_mmrbc(adapter->pdev);
4918 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4920 struct e1000_adapter *adapter = hw->back;
4921 pcix_set_mmrbc(adapter->pdev, mmrbc);
4924 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4929 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4933 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4938 static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4939 netdev_features_t features)
4941 struct e1000_hw *hw = &adapter->hw;
4945 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
4946 /* enable VLAN tag insert/strip */
4947 ctrl |= E1000_CTRL_VME;
4949 /* disable VLAN tag insert/strip */
4950 ctrl &= ~E1000_CTRL_VME;
4954 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4957 struct e1000_hw *hw = &adapter->hw;
4960 if (!test_bit(__E1000_DOWN, &adapter->flags))
4961 e1000_irq_disable(adapter);
4963 __e1000_vlan_mode(adapter, adapter->netdev->features);
4965 /* enable VLAN receive filtering */
4967 rctl &= ~E1000_RCTL_CFIEN;
4968 if (!(adapter->netdev->flags & IFF_PROMISC))
4969 rctl |= E1000_RCTL_VFE;
4971 e1000_update_mng_vlan(adapter);
4973 /* disable VLAN receive filtering */
4975 rctl &= ~E1000_RCTL_VFE;
4979 if (!test_bit(__E1000_DOWN, &adapter->flags))
4980 e1000_irq_enable(adapter);
4983 static void e1000_vlan_mode(struct net_device *netdev,
4984 netdev_features_t features)
4986 struct e1000_adapter *adapter = netdev_priv(netdev);
4988 if (!test_bit(__E1000_DOWN, &adapter->flags))
4989 e1000_irq_disable(adapter);
4991 __e1000_vlan_mode(adapter, features);
4993 if (!test_bit(__E1000_DOWN, &adapter->flags))
4994 e1000_irq_enable(adapter);
4997 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
4998 __be16 proto, u16 vid)
5000 struct e1000_adapter *adapter = netdev_priv(netdev);
5001 struct e1000_hw *hw = &adapter->hw;
5004 if ((hw->mng_cookie.status &
5005 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
5006 (vid == adapter->mng_vlan_id))
5009 if (!e1000_vlan_used(adapter))
5010 e1000_vlan_filter_on_off(adapter, true);
5012 /* add VID to filter table */
5013 index = (vid >> 5) & 0x7F;
5014 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
5015 vfta |= (1 << (vid & 0x1F));
5016 e1000_write_vfta(hw, index, vfta);
5018 set_bit(vid, adapter->active_vlans);
5023 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
5024 __be16 proto, u16 vid)
5026 struct e1000_adapter *adapter = netdev_priv(netdev);
5027 struct e1000_hw *hw = &adapter->hw;
5030 if (!test_bit(__E1000_DOWN, &adapter->flags))
5031 e1000_irq_disable(adapter);
5032 if (!test_bit(__E1000_DOWN, &adapter->flags))
5033 e1000_irq_enable(adapter);
5035 /* remove VID from filter table */
5036 index = (vid >> 5) & 0x7F;
5037 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
5038 vfta &= ~(1 << (vid & 0x1F));
5039 e1000_write_vfta(hw, index, vfta);
5041 clear_bit(vid, adapter->active_vlans);
5043 if (!e1000_vlan_used(adapter))
5044 e1000_vlan_filter_on_off(adapter, false);
5049 static void e1000_restore_vlan(struct e1000_adapter *adapter)
5053 if (!e1000_vlan_used(adapter))
5056 e1000_vlan_filter_on_off(adapter, true);
5057 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
5058 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
5061 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
5063 struct e1000_hw *hw = &adapter->hw;
5067 /* Make sure dplx is at most 1 bit and lsb of speed is not set
5068 * for the switch() below to work
5070 if ((spd & 1) || (dplx & ~1))
5073 /* Fiber NICs only allow 1000 gbps Full duplex */
5074 if ((hw->media_type == e1000_media_type_fiber) &&
5075 spd != SPEED_1000 &&
5076 dplx != DUPLEX_FULL)
5079 switch (spd + dplx) {
5080 case SPEED_10 + DUPLEX_HALF:
5081 hw->forced_speed_duplex = e1000_10_half;
5083 case SPEED_10 + DUPLEX_FULL:
5084 hw->forced_speed_duplex = e1000_10_full;
5086 case SPEED_100 + DUPLEX_HALF:
5087 hw->forced_speed_duplex = e1000_100_half;
5089 case SPEED_100 + DUPLEX_FULL:
5090 hw->forced_speed_duplex = e1000_100_full;
5092 case SPEED_1000 + DUPLEX_FULL:
5094 hw->autoneg_advertised = ADVERTISE_1000_FULL;
5096 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5101 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
5102 hw->mdix = AUTO_ALL_MODES;
5107 e_err(probe, "Unsupported Speed/Duplex configuration\n");
5111 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
5113 struct net_device *netdev = pci_get_drvdata(pdev);
5114 struct e1000_adapter *adapter = netdev_priv(netdev);
5115 struct e1000_hw *hw = &adapter->hw;
5116 u32 ctrl, ctrl_ext, rctl, status;
5117 u32 wufc = adapter->wol;
5122 netif_device_detach(netdev);
5124 if (netif_running(netdev)) {
5125 int count = E1000_CHECK_RESET_COUNT;
5127 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
5128 usleep_range(10000, 20000);
5130 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5131 e1000_down(adapter);
5135 retval = pci_save_state(pdev);
5140 status = er32(STATUS);
5141 if (status & E1000_STATUS_LU)
5142 wufc &= ~E1000_WUFC_LNKC;
5145 e1000_setup_rctl(adapter);
5146 e1000_set_rx_mode(netdev);
5150 /* turn on all-multi mode if wake on multicast is enabled */
5151 if (wufc & E1000_WUFC_MC)
5152 rctl |= E1000_RCTL_MPE;
5154 /* enable receives in the hardware */
5155 ew32(RCTL, rctl | E1000_RCTL_EN);
5157 if (hw->mac_type >= e1000_82540) {
5159 /* advertise wake from D3Cold */
5160 #define E1000_CTRL_ADVD3WUC 0x00100000
5161 /* phy power management enable */
5162 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5163 ctrl |= E1000_CTRL_ADVD3WUC |
5164 E1000_CTRL_EN_PHY_PWR_MGMT;
5168 if (hw->media_type == e1000_media_type_fiber ||
5169 hw->media_type == e1000_media_type_internal_serdes) {
5170 /* keep the laser running in D3 */
5171 ctrl_ext = er32(CTRL_EXT);
5172 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5173 ew32(CTRL_EXT, ctrl_ext);
5176 ew32(WUC, E1000_WUC_PME_EN);
5183 e1000_release_manageability(adapter);
5185 *enable_wake = !!wufc;
5187 /* make sure adapter isn't asleep if manageability is enabled */
5188 if (adapter->en_mng_pt)
5189 *enable_wake = true;
5191 if (netif_running(netdev))
5192 e1000_free_irq(adapter);
5194 if (!test_and_set_bit(__E1000_DISABLED, &adapter->flags))
5195 pci_disable_device(pdev);
5201 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5206 retval = __e1000_shutdown(pdev, &wake);
5211 pci_prepare_to_sleep(pdev);
5213 pci_wake_from_d3(pdev, false);
5214 pci_set_power_state(pdev, PCI_D3hot);
5220 static int e1000_resume(struct pci_dev *pdev)
5222 struct net_device *netdev = pci_get_drvdata(pdev);
5223 struct e1000_adapter *adapter = netdev_priv(netdev);
5224 struct e1000_hw *hw = &adapter->hw;
5227 pci_set_power_state(pdev, PCI_D0);
5228 pci_restore_state(pdev);
5229 pci_save_state(pdev);
5231 if (adapter->need_ioport)
5232 err = pci_enable_device(pdev);
5234 err = pci_enable_device_mem(pdev);
5236 pr_err("Cannot enable PCI device from suspend\n");
5240 /* flush memory to make sure state is correct */
5241 smp_mb__before_atomic();
5242 clear_bit(__E1000_DISABLED, &adapter->flags);
5243 pci_set_master(pdev);
5245 pci_enable_wake(pdev, PCI_D3hot, 0);
5246 pci_enable_wake(pdev, PCI_D3cold, 0);
5248 if (netif_running(netdev)) {
5249 err = e1000_request_irq(adapter);
5254 e1000_power_up_phy(adapter);
5255 e1000_reset(adapter);
5258 e1000_init_manageability(adapter);
5260 if (netif_running(netdev))
5263 netif_device_attach(netdev);
5269 static void e1000_shutdown(struct pci_dev *pdev)
5273 __e1000_shutdown(pdev, &wake);
5275 if (system_state == SYSTEM_POWER_OFF) {
5276 pci_wake_from_d3(pdev, wake);
5277 pci_set_power_state(pdev, PCI_D3hot);
5281 #ifdef CONFIG_NET_POLL_CONTROLLER
5282 /* Polling 'interrupt' - used by things like netconsole to send skbs
5283 * without having to re-enable interrupts. It's not called while
5284 * the interrupt routine is executing.
5286 static void e1000_netpoll(struct net_device *netdev)
5288 struct e1000_adapter *adapter = netdev_priv(netdev);
5290 disable_irq(adapter->pdev->irq);
5291 e1000_intr(adapter->pdev->irq, netdev);
5292 enable_irq(adapter->pdev->irq);
5297 * e1000_io_error_detected - called when PCI error is detected
5298 * @pdev: Pointer to PCI device
5299 * @state: The current pci connection state
5301 * This function is called after a PCI bus error affecting
5302 * this device has been detected.
5304 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5305 pci_channel_state_t state)
5307 struct net_device *netdev = pci_get_drvdata(pdev);
5308 struct e1000_adapter *adapter = netdev_priv(netdev);
5310 netif_device_detach(netdev);
5312 if (state == pci_channel_io_perm_failure)
5313 return PCI_ERS_RESULT_DISCONNECT;
5315 if (netif_running(netdev))
5316 e1000_down(adapter);
5318 if (!test_and_set_bit(__E1000_DISABLED, &adapter->flags))
5319 pci_disable_device(pdev);
5321 /* Request a slot slot reset. */
5322 return PCI_ERS_RESULT_NEED_RESET;
5326 * e1000_io_slot_reset - called after the pci bus has been reset.
5327 * @pdev: Pointer to PCI device
5329 * Restart the card from scratch, as if from a cold-boot. Implementation
5330 * resembles the first-half of the e1000_resume routine.
5332 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5334 struct net_device *netdev = pci_get_drvdata(pdev);
5335 struct e1000_adapter *adapter = netdev_priv(netdev);
5336 struct e1000_hw *hw = &adapter->hw;
5339 if (adapter->need_ioport)
5340 err = pci_enable_device(pdev);
5342 err = pci_enable_device_mem(pdev);
5344 pr_err("Cannot re-enable PCI device after reset.\n");
5345 return PCI_ERS_RESULT_DISCONNECT;
5348 /* flush memory to make sure state is correct */
5349 smp_mb__before_atomic();
5350 clear_bit(__E1000_DISABLED, &adapter->flags);
5351 pci_set_master(pdev);
5353 pci_enable_wake(pdev, PCI_D3hot, 0);
5354 pci_enable_wake(pdev, PCI_D3cold, 0);
5356 e1000_reset(adapter);
5359 return PCI_ERS_RESULT_RECOVERED;
5363 * e1000_io_resume - called when traffic can start flowing again.
5364 * @pdev: Pointer to PCI device
5366 * This callback is called when the error recovery driver tells us that
5367 * its OK to resume normal operation. Implementation resembles the
5368 * second-half of the e1000_resume routine.
5370 static void e1000_io_resume(struct pci_dev *pdev)
5372 struct net_device *netdev = pci_get_drvdata(pdev);
5373 struct e1000_adapter *adapter = netdev_priv(netdev);
5375 e1000_init_manageability(adapter);
5377 if (netif_running(netdev)) {
5378 if (e1000_up(adapter)) {
5379 pr_info("can't bring device back up after reset\n");
5384 netif_device_attach(netdev);