1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
30 #include <net/ip6_checksum.h>
32 #include <linux/prefetch.h>
33 #include <linux/bitops.h>
34 #include <linux/if_vlan.h>
36 char e1000_driver_name[] = "e1000";
37 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
38 #define DRV_VERSION "7.3.21-k8-NAPI"
39 const char e1000_driver_version[] = DRV_VERSION;
40 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
42 /* e1000_pci_tbl - PCI Device ID Table
44 * Last entry must be all 0s
47 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
49 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
50 INTEL_E1000_ETHERNET_DEVICE(0x1000),
51 INTEL_E1000_ETHERNET_DEVICE(0x1001),
52 INTEL_E1000_ETHERNET_DEVICE(0x1004),
53 INTEL_E1000_ETHERNET_DEVICE(0x1008),
54 INTEL_E1000_ETHERNET_DEVICE(0x1009),
55 INTEL_E1000_ETHERNET_DEVICE(0x100C),
56 INTEL_E1000_ETHERNET_DEVICE(0x100D),
57 INTEL_E1000_ETHERNET_DEVICE(0x100E),
58 INTEL_E1000_ETHERNET_DEVICE(0x100F),
59 INTEL_E1000_ETHERNET_DEVICE(0x1010),
60 INTEL_E1000_ETHERNET_DEVICE(0x1011),
61 INTEL_E1000_ETHERNET_DEVICE(0x1012),
62 INTEL_E1000_ETHERNET_DEVICE(0x1013),
63 INTEL_E1000_ETHERNET_DEVICE(0x1014),
64 INTEL_E1000_ETHERNET_DEVICE(0x1015),
65 INTEL_E1000_ETHERNET_DEVICE(0x1016),
66 INTEL_E1000_ETHERNET_DEVICE(0x1017),
67 INTEL_E1000_ETHERNET_DEVICE(0x1018),
68 INTEL_E1000_ETHERNET_DEVICE(0x1019),
69 INTEL_E1000_ETHERNET_DEVICE(0x101A),
70 INTEL_E1000_ETHERNET_DEVICE(0x101D),
71 INTEL_E1000_ETHERNET_DEVICE(0x101E),
72 INTEL_E1000_ETHERNET_DEVICE(0x1026),
73 INTEL_E1000_ETHERNET_DEVICE(0x1027),
74 INTEL_E1000_ETHERNET_DEVICE(0x1028),
75 INTEL_E1000_ETHERNET_DEVICE(0x1075),
76 INTEL_E1000_ETHERNET_DEVICE(0x1076),
77 INTEL_E1000_ETHERNET_DEVICE(0x1077),
78 INTEL_E1000_ETHERNET_DEVICE(0x1078),
79 INTEL_E1000_ETHERNET_DEVICE(0x1079),
80 INTEL_E1000_ETHERNET_DEVICE(0x107A),
81 INTEL_E1000_ETHERNET_DEVICE(0x107B),
82 INTEL_E1000_ETHERNET_DEVICE(0x107C),
83 INTEL_E1000_ETHERNET_DEVICE(0x108A),
84 INTEL_E1000_ETHERNET_DEVICE(0x1099),
85 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
86 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
87 /* required last entry */
91 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
93 int e1000_up(struct e1000_adapter *adapter);
94 void e1000_down(struct e1000_adapter *adapter);
95 void e1000_reinit_locked(struct e1000_adapter *adapter);
96 void e1000_reset(struct e1000_adapter *adapter);
97 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
98 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
99 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
100 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
101 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
102 struct e1000_tx_ring *txdr);
103 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
104 struct e1000_rx_ring *rxdr);
105 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
106 struct e1000_tx_ring *tx_ring);
107 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
108 struct e1000_rx_ring *rx_ring);
109 void e1000_update_stats(struct e1000_adapter *adapter);
111 static int e1000_init_module(void);
112 static void e1000_exit_module(void);
113 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
114 static void e1000_remove(struct pci_dev *pdev);
115 static int e1000_alloc_queues(struct e1000_adapter *adapter);
116 static int e1000_sw_init(struct e1000_adapter *adapter);
117 static int e1000_open(struct net_device *netdev);
118 static int e1000_close(struct net_device *netdev);
119 static void e1000_configure_tx(struct e1000_adapter *adapter);
120 static void e1000_configure_rx(struct e1000_adapter *adapter);
121 static void e1000_setup_rctl(struct e1000_adapter *adapter);
122 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
123 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
124 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
125 struct e1000_tx_ring *tx_ring);
126 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
127 struct e1000_rx_ring *rx_ring);
128 static void e1000_set_rx_mode(struct net_device *netdev);
129 static void e1000_update_phy_info_task(struct work_struct *work);
130 static void e1000_watchdog(struct work_struct *work);
131 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
132 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
133 struct net_device *netdev);
134 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
135 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
136 static int e1000_set_mac(struct net_device *netdev, void *p);
137 static irqreturn_t e1000_intr(int irq, void *data);
138 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
139 struct e1000_tx_ring *tx_ring);
140 static int e1000_clean(struct napi_struct *napi, int budget);
141 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
142 struct e1000_rx_ring *rx_ring,
143 int *work_done, int work_to_do);
144 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
145 struct e1000_rx_ring *rx_ring,
146 int *work_done, int work_to_do);
147 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
148 struct e1000_rx_ring *rx_ring,
150 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
151 struct e1000_rx_ring *rx_ring,
153 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
154 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
156 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
157 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
158 static void e1000_tx_timeout(struct net_device *dev);
159 static void e1000_reset_task(struct work_struct *work);
160 static void e1000_smartspeed(struct e1000_adapter *adapter);
161 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
162 struct sk_buff *skb);
164 static bool e1000_vlan_used(struct e1000_adapter *adapter);
165 static void e1000_vlan_mode(struct net_device *netdev,
166 netdev_features_t features);
167 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
169 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
170 __be16 proto, u16 vid);
171 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
172 __be16 proto, u16 vid);
173 static void e1000_restore_vlan(struct e1000_adapter *adapter);
176 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
177 static int e1000_resume(struct pci_dev *pdev);
179 static void e1000_shutdown(struct pci_dev *pdev);
181 #ifdef CONFIG_NET_POLL_CONTROLLER
182 /* for netdump / net console */
183 static void e1000_netpoll (struct net_device *netdev);
186 #define COPYBREAK_DEFAULT 256
187 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
188 module_param(copybreak, uint, 0644);
189 MODULE_PARM_DESC(copybreak,
190 "Maximum size of packet that is copied to a new buffer on receive");
192 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
193 pci_channel_state_t state);
194 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
195 static void e1000_io_resume(struct pci_dev *pdev);
197 static const struct pci_error_handlers e1000_err_handler = {
198 .error_detected = e1000_io_error_detected,
199 .slot_reset = e1000_io_slot_reset,
200 .resume = e1000_io_resume,
203 static struct pci_driver e1000_driver = {
204 .name = e1000_driver_name,
205 .id_table = e1000_pci_tbl,
206 .probe = e1000_probe,
207 .remove = e1000_remove,
209 /* Power Management Hooks */
210 .suspend = e1000_suspend,
211 .resume = e1000_resume,
213 .shutdown = e1000_shutdown,
214 .err_handler = &e1000_err_handler
217 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
218 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
219 MODULE_LICENSE("GPL");
220 MODULE_VERSION(DRV_VERSION);
222 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
223 static int debug = -1;
224 module_param(debug, int, 0);
225 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
228 * e1000_get_hw_dev - return device
229 * used by hardware layer to print debugging information
232 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
234 struct e1000_adapter *adapter = hw->back;
235 return adapter->netdev;
239 * e1000_init_module - Driver Registration Routine
241 * e1000_init_module is the first routine called when the driver is
242 * loaded. All it does is register with the PCI subsystem.
244 static int __init e1000_init_module(void)
247 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
249 pr_info("%s\n", e1000_copyright);
251 ret = pci_register_driver(&e1000_driver);
252 if (copybreak != COPYBREAK_DEFAULT) {
254 pr_info("copybreak disabled\n");
256 pr_info("copybreak enabled for "
257 "packets <= %u bytes\n", copybreak);
262 module_init(e1000_init_module);
265 * e1000_exit_module - Driver Exit Cleanup Routine
267 * e1000_exit_module is called just before the driver is removed
270 static void __exit e1000_exit_module(void)
272 pci_unregister_driver(&e1000_driver);
275 module_exit(e1000_exit_module);
277 static int e1000_request_irq(struct e1000_adapter *adapter)
279 struct net_device *netdev = adapter->netdev;
280 irq_handler_t handler = e1000_intr;
281 int irq_flags = IRQF_SHARED;
284 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
287 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
293 static void e1000_free_irq(struct e1000_adapter *adapter)
295 struct net_device *netdev = adapter->netdev;
297 free_irq(adapter->pdev->irq, netdev);
301 * e1000_irq_disable - Mask off interrupt generation on the NIC
302 * @adapter: board private structure
304 static void e1000_irq_disable(struct e1000_adapter *adapter)
306 struct e1000_hw *hw = &adapter->hw;
310 synchronize_irq(adapter->pdev->irq);
314 * e1000_irq_enable - Enable default interrupt generation settings
315 * @adapter: board private structure
317 static void e1000_irq_enable(struct e1000_adapter *adapter)
319 struct e1000_hw *hw = &adapter->hw;
321 ew32(IMS, IMS_ENABLE_MASK);
325 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
327 struct e1000_hw *hw = &adapter->hw;
328 struct net_device *netdev = adapter->netdev;
329 u16 vid = hw->mng_cookie.vlan_id;
330 u16 old_vid = adapter->mng_vlan_id;
332 if (!e1000_vlan_used(adapter))
335 if (!test_bit(vid, adapter->active_vlans)) {
336 if (hw->mng_cookie.status &
337 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
338 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
339 adapter->mng_vlan_id = vid;
341 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
343 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
345 !test_bit(old_vid, adapter->active_vlans))
346 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
349 adapter->mng_vlan_id = vid;
353 static void e1000_init_manageability(struct e1000_adapter *adapter)
355 struct e1000_hw *hw = &adapter->hw;
357 if (adapter->en_mng_pt) {
358 u32 manc = er32(MANC);
360 /* disable hardware interception of ARP */
361 manc &= ~(E1000_MANC_ARP_EN);
367 static void e1000_release_manageability(struct e1000_adapter *adapter)
369 struct e1000_hw *hw = &adapter->hw;
371 if (adapter->en_mng_pt) {
372 u32 manc = er32(MANC);
374 /* re-enable hardware interception of ARP */
375 manc |= E1000_MANC_ARP_EN;
382 * e1000_configure - configure the hardware for RX and TX
383 * @adapter = private board structure
385 static void e1000_configure(struct e1000_adapter *adapter)
387 struct net_device *netdev = adapter->netdev;
390 e1000_set_rx_mode(netdev);
392 e1000_restore_vlan(adapter);
393 e1000_init_manageability(adapter);
395 e1000_configure_tx(adapter);
396 e1000_setup_rctl(adapter);
397 e1000_configure_rx(adapter);
398 /* call E1000_DESC_UNUSED which always leaves
399 * at least 1 descriptor unused to make sure
400 * next_to_use != next_to_clean
402 for (i = 0; i < adapter->num_rx_queues; i++) {
403 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
404 adapter->alloc_rx_buf(adapter, ring,
405 E1000_DESC_UNUSED(ring));
409 int e1000_up(struct e1000_adapter *adapter)
411 struct e1000_hw *hw = &adapter->hw;
413 /* hardware has been reset, we need to reload some things */
414 e1000_configure(adapter);
416 clear_bit(__E1000_DOWN, &adapter->flags);
418 napi_enable(&adapter->napi);
420 e1000_irq_enable(adapter);
422 netif_wake_queue(adapter->netdev);
424 /* fire a link change interrupt to start the watchdog */
425 ew32(ICS, E1000_ICS_LSC);
430 * e1000_power_up_phy - restore link in case the phy was powered down
431 * @adapter: address of board private structure
433 * The phy may be powered down to save power and turn off link when the
434 * driver is unloaded and wake on lan is not enabled (among others)
435 * *** this routine MUST be followed by a call to e1000_reset ***
437 void e1000_power_up_phy(struct e1000_adapter *adapter)
439 struct e1000_hw *hw = &adapter->hw;
442 /* Just clear the power down bit to wake the phy back up */
443 if (hw->media_type == e1000_media_type_copper) {
444 /* according to the manual, the phy will retain its
445 * settings across a power-down/up cycle
447 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
448 mii_reg &= ~MII_CR_POWER_DOWN;
449 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
453 static void e1000_power_down_phy(struct e1000_adapter *adapter)
455 struct e1000_hw *hw = &adapter->hw;
457 /* Power down the PHY so no link is implied when interface is down *
458 * The PHY cannot be powered down if any of the following is true *
461 * (c) SoL/IDER session is active
463 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
464 hw->media_type == e1000_media_type_copper) {
467 switch (hw->mac_type) {
470 case e1000_82545_rev_3:
473 case e1000_82546_rev_3:
475 case e1000_82541_rev_2:
477 case e1000_82547_rev_2:
478 if (er32(MANC) & E1000_MANC_SMBUS_EN)
484 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
485 mii_reg |= MII_CR_POWER_DOWN;
486 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
493 static void e1000_down_and_stop(struct e1000_adapter *adapter)
495 set_bit(__E1000_DOWN, &adapter->flags);
497 /* Only kill reset task if adapter is not resetting */
498 if (!test_bit(__E1000_RESETTING, &adapter->flags))
499 cancel_work_sync(&adapter->reset_task);
501 cancel_delayed_work_sync(&adapter->watchdog_task);
502 cancel_delayed_work_sync(&adapter->phy_info_task);
503 cancel_delayed_work_sync(&adapter->fifo_stall_task);
506 void e1000_down(struct e1000_adapter *adapter)
508 struct e1000_hw *hw = &adapter->hw;
509 struct net_device *netdev = adapter->netdev;
513 /* disable receives in the hardware */
515 ew32(RCTL, rctl & ~E1000_RCTL_EN);
516 /* flush and sleep below */
518 netif_tx_disable(netdev);
520 /* disable transmits in the hardware */
522 tctl &= ~E1000_TCTL_EN;
524 /* flush both disables and wait for them to finish */
528 napi_disable(&adapter->napi);
530 e1000_irq_disable(adapter);
532 /* Setting DOWN must be after irq_disable to prevent
533 * a screaming interrupt. Setting DOWN also prevents
534 * tasks from rescheduling.
536 e1000_down_and_stop(adapter);
538 adapter->link_speed = 0;
539 adapter->link_duplex = 0;
540 netif_carrier_off(netdev);
542 e1000_reset(adapter);
543 e1000_clean_all_tx_rings(adapter);
544 e1000_clean_all_rx_rings(adapter);
547 static void e1000_reinit_safe(struct e1000_adapter *adapter)
549 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
551 mutex_lock(&adapter->mutex);
554 mutex_unlock(&adapter->mutex);
555 clear_bit(__E1000_RESETTING, &adapter->flags);
558 void e1000_reinit_locked(struct e1000_adapter *adapter)
560 /* if rtnl_lock is not held the call path is bogus */
562 WARN_ON(in_interrupt());
563 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
567 clear_bit(__E1000_RESETTING, &adapter->flags);
570 void e1000_reset(struct e1000_adapter *adapter)
572 struct e1000_hw *hw = &adapter->hw;
573 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
574 bool legacy_pba_adjust = false;
577 /* Repartition Pba for greater than 9k mtu
578 * To take effect CTRL.RST is required.
581 switch (hw->mac_type) {
582 case e1000_82542_rev2_0:
583 case e1000_82542_rev2_1:
588 case e1000_82541_rev_2:
589 legacy_pba_adjust = true;
593 case e1000_82545_rev_3:
596 case e1000_82546_rev_3:
600 case e1000_82547_rev_2:
601 legacy_pba_adjust = true;
604 case e1000_undefined:
609 if (legacy_pba_adjust) {
610 if (hw->max_frame_size > E1000_RXBUFFER_8192)
611 pba -= 8; /* allocate more FIFO for Tx */
613 if (hw->mac_type == e1000_82547) {
614 adapter->tx_fifo_head = 0;
615 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
616 adapter->tx_fifo_size =
617 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
618 atomic_set(&adapter->tx_fifo_stall, 0);
620 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
621 /* adjust PBA for jumbo frames */
624 /* To maintain wire speed transmits, the Tx FIFO should be
625 * large enough to accommodate two full transmit packets,
626 * rounded up to the next 1KB and expressed in KB. Likewise,
627 * the Rx FIFO should be large enough to accommodate at least
628 * one full receive packet and is similarly rounded up and
632 /* upper 16 bits has Tx packet buffer allocation size in KB */
633 tx_space = pba >> 16;
634 /* lower 16 bits has Rx packet buffer allocation size in KB */
636 /* the Tx fifo also stores 16 bytes of information about the Tx
637 * but don't include ethernet FCS because hardware appends it
639 min_tx_space = (hw->max_frame_size +
640 sizeof(struct e1000_tx_desc) -
642 min_tx_space = ALIGN(min_tx_space, 1024);
644 /* software strips receive CRC, so leave room for it */
645 min_rx_space = hw->max_frame_size;
646 min_rx_space = ALIGN(min_rx_space, 1024);
649 /* If current Tx allocation is less than the min Tx FIFO size,
650 * and the min Tx FIFO size is less than the current Rx FIFO
651 * allocation, take space away from current Rx allocation
653 if (tx_space < min_tx_space &&
654 ((min_tx_space - tx_space) < pba)) {
655 pba = pba - (min_tx_space - tx_space);
657 /* PCI/PCIx hardware has PBA alignment constraints */
658 switch (hw->mac_type) {
659 case e1000_82545 ... e1000_82546_rev_3:
660 pba &= ~(E1000_PBA_8K - 1);
666 /* if short on Rx space, Rx wins and must trump Tx
667 * adjustment or use Early Receive if available
669 if (pba < min_rx_space)
676 /* flow control settings:
677 * The high water mark must be low enough to fit one full frame
678 * (or the size used for early receive) above it in the Rx FIFO.
679 * Set it to the lower of:
680 * - 90% of the Rx FIFO size, and
681 * - the full Rx FIFO size minus the early receive size (for parts
682 * with ERT support assuming ERT set to E1000_ERT_2048), or
683 * - the full Rx FIFO size minus one full frame
685 hwm = min(((pba << 10) * 9 / 10),
686 ((pba << 10) - hw->max_frame_size));
688 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
689 hw->fc_low_water = hw->fc_high_water - 8;
690 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
692 hw->fc = hw->original_fc;
694 /* Allow time for pending master requests to run */
696 if (hw->mac_type >= e1000_82544)
699 if (e1000_init_hw(hw))
700 e_dev_err("Hardware Error\n");
701 e1000_update_mng_vlan(adapter);
703 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
704 if (hw->mac_type >= e1000_82544 &&
706 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
707 u32 ctrl = er32(CTRL);
708 /* clear phy power management bit if we are in gig only mode,
709 * which if enabled will attempt negotiation to 100Mb, which
710 * can cause a loss of link at power off or driver unload
712 ctrl &= ~E1000_CTRL_SWDPIN3;
716 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
717 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
719 e1000_reset_adaptive(hw);
720 e1000_phy_get_info(hw, &adapter->phy_info);
722 e1000_release_manageability(adapter);
725 /* Dump the eeprom for users having checksum issues */
726 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
728 struct net_device *netdev = adapter->netdev;
729 struct ethtool_eeprom eeprom;
730 const struct ethtool_ops *ops = netdev->ethtool_ops;
733 u16 csum_old, csum_new = 0;
735 eeprom.len = ops->get_eeprom_len(netdev);
738 data = kmalloc(eeprom.len, GFP_KERNEL);
742 ops->get_eeprom(netdev, &eeprom, data);
744 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
745 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
746 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
747 csum_new += data[i] + (data[i + 1] << 8);
748 csum_new = EEPROM_SUM - csum_new;
750 pr_err("/*********************/\n");
751 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
752 pr_err("Calculated : 0x%04x\n", csum_new);
754 pr_err("Offset Values\n");
755 pr_err("======== ======\n");
756 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
758 pr_err("Include this output when contacting your support provider.\n");
759 pr_err("This is not a software error! Something bad happened to\n");
760 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
761 pr_err("result in further problems, possibly loss of data,\n");
762 pr_err("corruption or system hangs!\n");
763 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
764 pr_err("which is invalid and requires you to set the proper MAC\n");
765 pr_err("address manually before continuing to enable this network\n");
766 pr_err("device. Please inspect the EEPROM dump and report the\n");
767 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
768 pr_err("/*********************/\n");
774 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
775 * @pdev: PCI device information struct
777 * Return true if an adapter needs ioport resources
779 static int e1000_is_need_ioport(struct pci_dev *pdev)
781 switch (pdev->device) {
782 case E1000_DEV_ID_82540EM:
783 case E1000_DEV_ID_82540EM_LOM:
784 case E1000_DEV_ID_82540EP:
785 case E1000_DEV_ID_82540EP_LOM:
786 case E1000_DEV_ID_82540EP_LP:
787 case E1000_DEV_ID_82541EI:
788 case E1000_DEV_ID_82541EI_MOBILE:
789 case E1000_DEV_ID_82541ER:
790 case E1000_DEV_ID_82541ER_LOM:
791 case E1000_DEV_ID_82541GI:
792 case E1000_DEV_ID_82541GI_LF:
793 case E1000_DEV_ID_82541GI_MOBILE:
794 case E1000_DEV_ID_82544EI_COPPER:
795 case E1000_DEV_ID_82544EI_FIBER:
796 case E1000_DEV_ID_82544GC_COPPER:
797 case E1000_DEV_ID_82544GC_LOM:
798 case E1000_DEV_ID_82545EM_COPPER:
799 case E1000_DEV_ID_82545EM_FIBER:
800 case E1000_DEV_ID_82546EB_COPPER:
801 case E1000_DEV_ID_82546EB_FIBER:
802 case E1000_DEV_ID_82546EB_QUAD_COPPER:
809 static netdev_features_t e1000_fix_features(struct net_device *netdev,
810 netdev_features_t features)
812 /* Since there is no support for separate Rx/Tx vlan accel
813 * enable/disable make sure Tx flag is always in same state as Rx.
815 if (features & NETIF_F_HW_VLAN_CTAG_RX)
816 features |= NETIF_F_HW_VLAN_CTAG_TX;
818 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
823 static int e1000_set_features(struct net_device *netdev,
824 netdev_features_t features)
826 struct e1000_adapter *adapter = netdev_priv(netdev);
827 netdev_features_t changed = features ^ netdev->features;
829 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
830 e1000_vlan_mode(netdev, features);
832 if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL)))
835 netdev->features = features;
836 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
838 if (netif_running(netdev))
839 e1000_reinit_locked(adapter);
841 e1000_reset(adapter);
846 static const struct net_device_ops e1000_netdev_ops = {
847 .ndo_open = e1000_open,
848 .ndo_stop = e1000_close,
849 .ndo_start_xmit = e1000_xmit_frame,
850 .ndo_get_stats = e1000_get_stats,
851 .ndo_set_rx_mode = e1000_set_rx_mode,
852 .ndo_set_mac_address = e1000_set_mac,
853 .ndo_tx_timeout = e1000_tx_timeout,
854 .ndo_change_mtu = e1000_change_mtu,
855 .ndo_do_ioctl = e1000_ioctl,
856 .ndo_validate_addr = eth_validate_addr,
857 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
858 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
859 #ifdef CONFIG_NET_POLL_CONTROLLER
860 .ndo_poll_controller = e1000_netpoll,
862 .ndo_fix_features = e1000_fix_features,
863 .ndo_set_features = e1000_set_features,
867 * e1000_init_hw_struct - initialize members of hw struct
868 * @adapter: board private struct
869 * @hw: structure used by e1000_hw.c
871 * Factors out initialization of the e1000_hw struct to its own function
872 * that can be called very early at init (just after struct allocation).
873 * Fields are initialized based on PCI device information and
874 * OS network device settings (MTU size).
875 * Returns negative error codes if MAC type setup fails.
877 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
880 struct pci_dev *pdev = adapter->pdev;
882 /* PCI config space info */
883 hw->vendor_id = pdev->vendor;
884 hw->device_id = pdev->device;
885 hw->subsystem_vendor_id = pdev->subsystem_vendor;
886 hw->subsystem_id = pdev->subsystem_device;
887 hw->revision_id = pdev->revision;
889 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
891 hw->max_frame_size = adapter->netdev->mtu +
892 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
893 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
895 /* identify the MAC */
896 if (e1000_set_mac_type(hw)) {
897 e_err(probe, "Unknown MAC Type\n");
901 switch (hw->mac_type) {
906 case e1000_82541_rev_2:
907 case e1000_82547_rev_2:
908 hw->phy_init_script = 1;
912 e1000_set_media_type(hw);
913 e1000_get_bus_info(hw);
915 hw->wait_autoneg_complete = false;
916 hw->tbi_compatibility_en = true;
917 hw->adaptive_ifs = true;
921 if (hw->media_type == e1000_media_type_copper) {
922 hw->mdix = AUTO_ALL_MODES;
923 hw->disable_polarity_correction = false;
924 hw->master_slave = E1000_MASTER_SLAVE;
931 * e1000_probe - Device Initialization Routine
932 * @pdev: PCI device information struct
933 * @ent: entry in e1000_pci_tbl
935 * Returns 0 on success, negative on failure
937 * e1000_probe initializes an adapter identified by a pci_dev structure.
938 * The OS initialization, configuring of the adapter private structure,
939 * and a hardware reset occur.
941 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
943 struct net_device *netdev;
944 struct e1000_adapter *adapter;
947 static int cards_found = 0;
948 static int global_quad_port_a = 0; /* global ksp3 port a indication */
949 int i, err, pci_using_dac;
952 u16 eeprom_apme_mask = E1000_EEPROM_APME;
953 int bars, need_ioport;
955 /* do not allocate ioport bars when not needed */
956 need_ioport = e1000_is_need_ioport(pdev);
958 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
959 err = pci_enable_device(pdev);
961 bars = pci_select_bars(pdev, IORESOURCE_MEM);
962 err = pci_enable_device_mem(pdev);
967 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
971 pci_set_master(pdev);
972 err = pci_save_state(pdev);
974 goto err_alloc_etherdev;
977 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
979 goto err_alloc_etherdev;
981 SET_NETDEV_DEV(netdev, &pdev->dev);
983 pci_set_drvdata(pdev, netdev);
984 adapter = netdev_priv(netdev);
985 adapter->netdev = netdev;
986 adapter->pdev = pdev;
987 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
988 adapter->bars = bars;
989 adapter->need_ioport = need_ioport;
995 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
999 if (adapter->need_ioport) {
1000 for (i = BAR_1; i <= BAR_5; i++) {
1001 if (pci_resource_len(pdev, i) == 0)
1003 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1004 hw->io_base = pci_resource_start(pdev, i);
1010 /* make ready for any if (hw->...) below */
1011 err = e1000_init_hw_struct(adapter, hw);
1015 /* there is a workaround being applied below that limits
1016 * 64-bit DMA addresses to 64-bit hardware. There are some
1017 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1020 if ((hw->bus_type == e1000_bus_type_pcix) &&
1021 !dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
1024 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1026 pr_err("No usable DMA config, aborting\n");
1031 netdev->netdev_ops = &e1000_netdev_ops;
1032 e1000_set_ethtool_ops(netdev);
1033 netdev->watchdog_timeo = 5 * HZ;
1034 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1036 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1038 adapter->bd_number = cards_found;
1040 /* setup the private structure */
1042 err = e1000_sw_init(adapter);
1047 if (hw->mac_type == e1000_ce4100) {
1048 hw->ce4100_gbe_mdio_base_virt =
1049 ioremap(pci_resource_start(pdev, BAR_1),
1050 pci_resource_len(pdev, BAR_1));
1052 if (!hw->ce4100_gbe_mdio_base_virt)
1053 goto err_mdio_ioremap;
1056 if (hw->mac_type >= e1000_82543) {
1057 netdev->hw_features = NETIF_F_SG |
1059 NETIF_F_HW_VLAN_CTAG_RX;
1060 netdev->features = NETIF_F_HW_VLAN_CTAG_TX |
1061 NETIF_F_HW_VLAN_CTAG_FILTER;
1064 if ((hw->mac_type >= e1000_82544) &&
1065 (hw->mac_type != e1000_82547))
1066 netdev->hw_features |= NETIF_F_TSO;
1068 netdev->priv_flags |= IFF_SUPP_NOFCS;
1070 netdev->features |= netdev->hw_features;
1071 netdev->hw_features |= (NETIF_F_RXCSUM |
1075 if (pci_using_dac) {
1076 netdev->features |= NETIF_F_HIGHDMA;
1077 netdev->vlan_features |= NETIF_F_HIGHDMA;
1080 netdev->vlan_features |= (NETIF_F_TSO |
1084 netdev->priv_flags |= IFF_UNICAST_FLT;
1086 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1088 /* initialize eeprom parameters */
1089 if (e1000_init_eeprom_params(hw)) {
1090 e_err(probe, "EEPROM initialization failed\n");
1094 /* before reading the EEPROM, reset the controller to
1095 * put the device in a known good starting state
1100 /* make sure the EEPROM is good */
1101 if (e1000_validate_eeprom_checksum(hw) < 0) {
1102 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1103 e1000_dump_eeprom(adapter);
1104 /* set MAC address to all zeroes to invalidate and temporary
1105 * disable this device for the user. This blocks regular
1106 * traffic while still permitting ethtool ioctls from reaching
1107 * the hardware as well as allowing the user to run the
1108 * interface after manually setting a hw addr using
1111 memset(hw->mac_addr, 0, netdev->addr_len);
1113 /* copy the MAC address out of the EEPROM */
1114 if (e1000_read_mac_addr(hw))
1115 e_err(probe, "EEPROM Read Error\n");
1117 /* don't block initalization here due to bad MAC address */
1118 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1120 if (!is_valid_ether_addr(netdev->dev_addr))
1121 e_err(probe, "Invalid MAC Address\n");
1124 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1125 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1126 e1000_82547_tx_fifo_stall_task);
1127 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1128 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1130 e1000_check_options(adapter);
1132 /* Initial Wake on LAN setting
1133 * If APM wake is enabled in the EEPROM,
1134 * enable the ACPI Magic Packet filter
1137 switch (hw->mac_type) {
1138 case e1000_82542_rev2_0:
1139 case e1000_82542_rev2_1:
1143 e1000_read_eeprom(hw,
1144 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1145 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1148 case e1000_82546_rev_3:
1149 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1150 e1000_read_eeprom(hw,
1151 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1156 e1000_read_eeprom(hw,
1157 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1160 if (eeprom_data & eeprom_apme_mask)
1161 adapter->eeprom_wol |= E1000_WUFC_MAG;
1163 /* now that we have the eeprom settings, apply the special cases
1164 * where the eeprom may be wrong or the board simply won't support
1165 * wake on lan on a particular port
1167 switch (pdev->device) {
1168 case E1000_DEV_ID_82546GB_PCIE:
1169 adapter->eeprom_wol = 0;
1171 case E1000_DEV_ID_82546EB_FIBER:
1172 case E1000_DEV_ID_82546GB_FIBER:
1173 /* Wake events only supported on port A for dual fiber
1174 * regardless of eeprom setting
1176 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1177 adapter->eeprom_wol = 0;
1179 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1180 /* if quad port adapter, disable WoL on all but port A */
1181 if (global_quad_port_a != 0)
1182 adapter->eeprom_wol = 0;
1184 adapter->quad_port_a = true;
1185 /* Reset for multiple quad port adapters */
1186 if (++global_quad_port_a == 4)
1187 global_quad_port_a = 0;
1191 /* initialize the wol settings based on the eeprom settings */
1192 adapter->wol = adapter->eeprom_wol;
1193 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1195 /* Auto detect PHY address */
1196 if (hw->mac_type == e1000_ce4100) {
1197 for (i = 0; i < 32; i++) {
1199 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1200 if (tmp == 0 || tmp == 0xFF) {
1209 /* reset the hardware with the new settings */
1210 e1000_reset(adapter);
1212 strcpy(netdev->name, "eth%d");
1213 err = register_netdev(netdev);
1217 e1000_vlan_filter_on_off(adapter, false);
1219 /* print bus type/speed/width info */
1220 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1221 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1222 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1223 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1224 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1225 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1226 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1229 /* carrier off reporting is important to ethtool even BEFORE open */
1230 netif_carrier_off(netdev);
1232 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1239 e1000_phy_hw_reset(hw);
1241 if (hw->flash_address)
1242 iounmap(hw->flash_address);
1243 kfree(adapter->tx_ring);
1244 kfree(adapter->rx_ring);
1248 iounmap(hw->ce4100_gbe_mdio_base_virt);
1249 iounmap(hw->hw_addr);
1251 free_netdev(netdev);
1253 pci_release_selected_regions(pdev, bars);
1255 pci_disable_device(pdev);
1260 * e1000_remove - Device Removal Routine
1261 * @pdev: PCI device information struct
1263 * e1000_remove is called by the PCI subsystem to alert the driver
1264 * that it should release a PCI device. The could be caused by a
1265 * Hot-Plug event, or because the driver is going to be removed from
1268 static void e1000_remove(struct pci_dev *pdev)
1270 struct net_device *netdev = pci_get_drvdata(pdev);
1271 struct e1000_adapter *adapter = netdev_priv(netdev);
1272 struct e1000_hw *hw = &adapter->hw;
1274 e1000_down_and_stop(adapter);
1275 e1000_release_manageability(adapter);
1277 unregister_netdev(netdev);
1279 e1000_phy_hw_reset(hw);
1281 kfree(adapter->tx_ring);
1282 kfree(adapter->rx_ring);
1284 if (hw->mac_type == e1000_ce4100)
1285 iounmap(hw->ce4100_gbe_mdio_base_virt);
1286 iounmap(hw->hw_addr);
1287 if (hw->flash_address)
1288 iounmap(hw->flash_address);
1289 pci_release_selected_regions(pdev, adapter->bars);
1291 free_netdev(netdev);
1293 pci_disable_device(pdev);
1297 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1298 * @adapter: board private structure to initialize
1300 * e1000_sw_init initializes the Adapter private data structure.
1301 * e1000_init_hw_struct MUST be called before this function
1303 static int e1000_sw_init(struct e1000_adapter *adapter)
1305 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1307 adapter->num_tx_queues = 1;
1308 adapter->num_rx_queues = 1;
1310 if (e1000_alloc_queues(adapter)) {
1311 e_err(probe, "Unable to allocate memory for queues\n");
1315 /* Explicitly disable IRQ since the NIC can be in any state. */
1316 e1000_irq_disable(adapter);
1318 spin_lock_init(&adapter->stats_lock);
1319 mutex_init(&adapter->mutex);
1321 set_bit(__E1000_DOWN, &adapter->flags);
1327 * e1000_alloc_queues - Allocate memory for all rings
1328 * @adapter: board private structure to initialize
1330 * We allocate one ring per queue at run-time since we don't know the
1331 * number of queues at compile-time.
1333 static int e1000_alloc_queues(struct e1000_adapter *adapter)
1335 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1336 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1337 if (!adapter->tx_ring)
1340 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1341 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1342 if (!adapter->rx_ring) {
1343 kfree(adapter->tx_ring);
1347 return E1000_SUCCESS;
1351 * e1000_open - Called when a network interface is made active
1352 * @netdev: network interface device structure
1354 * Returns 0 on success, negative value on failure
1356 * The open entry point is called when a network interface is made
1357 * active by the system (IFF_UP). At this point all resources needed
1358 * for transmit and receive operations are allocated, the interrupt
1359 * handler is registered with the OS, the watchdog task is started,
1360 * and the stack is notified that the interface is ready.
1362 static int e1000_open(struct net_device *netdev)
1364 struct e1000_adapter *adapter = netdev_priv(netdev);
1365 struct e1000_hw *hw = &adapter->hw;
1368 /* disallow open during test */
1369 if (test_bit(__E1000_TESTING, &adapter->flags))
1372 netif_carrier_off(netdev);
1374 /* allocate transmit descriptors */
1375 err = e1000_setup_all_tx_resources(adapter);
1379 /* allocate receive descriptors */
1380 err = e1000_setup_all_rx_resources(adapter);
1384 e1000_power_up_phy(adapter);
1386 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1387 if ((hw->mng_cookie.status &
1388 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1389 e1000_update_mng_vlan(adapter);
1392 /* before we allocate an interrupt, we must be ready to handle it.
1393 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1394 * as soon as we call pci_request_irq, so we have to setup our
1395 * clean_rx handler before we do so.
1397 e1000_configure(adapter);
1399 err = e1000_request_irq(adapter);
1403 /* From here on the code is the same as e1000_up() */
1404 clear_bit(__E1000_DOWN, &adapter->flags);
1406 napi_enable(&adapter->napi);
1408 e1000_irq_enable(adapter);
1410 netif_start_queue(netdev);
1412 /* fire a link status change interrupt to start the watchdog */
1413 ew32(ICS, E1000_ICS_LSC);
1415 return E1000_SUCCESS;
1418 e1000_power_down_phy(adapter);
1419 e1000_free_all_rx_resources(adapter);
1421 e1000_free_all_tx_resources(adapter);
1423 e1000_reset(adapter);
1429 * e1000_close - Disables a network interface
1430 * @netdev: network interface device structure
1432 * Returns 0, this is not allowed to fail
1434 * The close entry point is called when an interface is de-activated
1435 * by the OS. The hardware is still under the drivers control, but
1436 * needs to be disabled. A global MAC reset is issued to stop the
1437 * hardware, and all transmit and receive resources are freed.
1439 static int e1000_close(struct net_device *netdev)
1441 struct e1000_adapter *adapter = netdev_priv(netdev);
1442 struct e1000_hw *hw = &adapter->hw;
1444 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1445 e1000_down(adapter);
1446 e1000_power_down_phy(adapter);
1447 e1000_free_irq(adapter);
1449 e1000_free_all_tx_resources(adapter);
1450 e1000_free_all_rx_resources(adapter);
1452 /* kill manageability vlan ID if supported, but not if a vlan with
1453 * the same ID is registered on the host OS (let 8021q kill it)
1455 if ((hw->mng_cookie.status &
1456 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1457 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1458 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
1459 adapter->mng_vlan_id);
1466 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1467 * @adapter: address of board private structure
1468 * @start: address of beginning of memory
1469 * @len: length of memory
1471 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1474 struct e1000_hw *hw = &adapter->hw;
1475 unsigned long begin = (unsigned long)start;
1476 unsigned long end = begin + len;
1478 /* First rev 82545 and 82546 need to not allow any memory
1479 * write location to cross 64k boundary due to errata 23
1481 if (hw->mac_type == e1000_82545 ||
1482 hw->mac_type == e1000_ce4100 ||
1483 hw->mac_type == e1000_82546) {
1484 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1491 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1492 * @adapter: board private structure
1493 * @txdr: tx descriptor ring (for a specific queue) to setup
1495 * Return 0 on success, negative on failure
1497 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1498 struct e1000_tx_ring *txdr)
1500 struct pci_dev *pdev = adapter->pdev;
1503 size = sizeof(struct e1000_buffer) * txdr->count;
1504 txdr->buffer_info = vzalloc(size);
1505 if (!txdr->buffer_info)
1508 /* round up to nearest 4K */
1510 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1511 txdr->size = ALIGN(txdr->size, 4096);
1513 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1517 vfree(txdr->buffer_info);
1521 /* Fix for errata 23, can't cross 64kB boundary */
1522 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1523 void *olddesc = txdr->desc;
1524 dma_addr_t olddma = txdr->dma;
1525 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1526 txdr->size, txdr->desc);
1527 /* Try again, without freeing the previous */
1528 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1529 &txdr->dma, GFP_KERNEL);
1530 /* Failed allocation, critical failure */
1532 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1534 goto setup_tx_desc_die;
1537 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1539 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1541 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1543 e_err(probe, "Unable to allocate aligned memory "
1544 "for the transmit descriptor ring\n");
1545 vfree(txdr->buffer_info);
1548 /* Free old allocation, new allocation was successful */
1549 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1553 memset(txdr->desc, 0, txdr->size);
1555 txdr->next_to_use = 0;
1556 txdr->next_to_clean = 0;
1562 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1563 * (Descriptors) for all queues
1564 * @adapter: board private structure
1566 * Return 0 on success, negative on failure
1568 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1572 for (i = 0; i < adapter->num_tx_queues; i++) {
1573 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1575 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1576 for (i-- ; i >= 0; i--)
1577 e1000_free_tx_resources(adapter,
1578 &adapter->tx_ring[i]);
1587 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1588 * @adapter: board private structure
1590 * Configure the Tx unit of the MAC after a reset.
1592 static void e1000_configure_tx(struct e1000_adapter *adapter)
1595 struct e1000_hw *hw = &adapter->hw;
1596 u32 tdlen, tctl, tipg;
1599 /* Setup the HW Tx Head and Tail descriptor pointers */
1601 switch (adapter->num_tx_queues) {
1604 tdba = adapter->tx_ring[0].dma;
1605 tdlen = adapter->tx_ring[0].count *
1606 sizeof(struct e1000_tx_desc);
1608 ew32(TDBAH, (tdba >> 32));
1609 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1612 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ?
1613 E1000_TDH : E1000_82542_TDH);
1614 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ?
1615 E1000_TDT : E1000_82542_TDT);
1619 /* Set the default values for the Tx Inter Packet Gap timer */
1620 if ((hw->media_type == e1000_media_type_fiber ||
1621 hw->media_type == e1000_media_type_internal_serdes))
1622 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1624 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1626 switch (hw->mac_type) {
1627 case e1000_82542_rev2_0:
1628 case e1000_82542_rev2_1:
1629 tipg = DEFAULT_82542_TIPG_IPGT;
1630 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1631 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1634 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1635 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1638 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1639 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1642 /* Set the Tx Interrupt Delay register */
1644 ew32(TIDV, adapter->tx_int_delay);
1645 if (hw->mac_type >= e1000_82540)
1646 ew32(TADV, adapter->tx_abs_int_delay);
1648 /* Program the Transmit Control Register */
1651 tctl &= ~E1000_TCTL_CT;
1652 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1653 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1655 e1000_config_collision_dist(hw);
1657 /* Setup Transmit Descriptor Settings for eop descriptor */
1658 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1660 /* only set IDE if we are delaying interrupts using the timers */
1661 if (adapter->tx_int_delay)
1662 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1664 if (hw->mac_type < e1000_82543)
1665 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1667 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1669 /* Cache if we're 82544 running in PCI-X because we'll
1670 * need this to apply a workaround later in the send path.
1672 if (hw->mac_type == e1000_82544 &&
1673 hw->bus_type == e1000_bus_type_pcix)
1674 adapter->pcix_82544 = true;
1681 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1682 * @adapter: board private structure
1683 * @rxdr: rx descriptor ring (for a specific queue) to setup
1685 * Returns 0 on success, negative on failure
1687 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1688 struct e1000_rx_ring *rxdr)
1690 struct pci_dev *pdev = adapter->pdev;
1693 size = sizeof(struct e1000_buffer) * rxdr->count;
1694 rxdr->buffer_info = vzalloc(size);
1695 if (!rxdr->buffer_info)
1698 desc_len = sizeof(struct e1000_rx_desc);
1700 /* Round up to nearest 4K */
1702 rxdr->size = rxdr->count * desc_len;
1703 rxdr->size = ALIGN(rxdr->size, 4096);
1705 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1709 vfree(rxdr->buffer_info);
1713 /* Fix for errata 23, can't cross 64kB boundary */
1714 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1715 void *olddesc = rxdr->desc;
1716 dma_addr_t olddma = rxdr->dma;
1717 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1718 rxdr->size, rxdr->desc);
1719 /* Try again, without freeing the previous */
1720 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1721 &rxdr->dma, GFP_KERNEL);
1722 /* Failed allocation, critical failure */
1724 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1726 goto setup_rx_desc_die;
1729 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1731 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1733 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1735 e_err(probe, "Unable to allocate aligned memory for "
1736 "the Rx descriptor ring\n");
1737 goto setup_rx_desc_die;
1739 /* Free old allocation, new allocation was successful */
1740 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1744 memset(rxdr->desc, 0, rxdr->size);
1746 rxdr->next_to_clean = 0;
1747 rxdr->next_to_use = 0;
1748 rxdr->rx_skb_top = NULL;
1754 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1755 * (Descriptors) for all queues
1756 * @adapter: board private structure
1758 * Return 0 on success, negative on failure
1760 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1764 for (i = 0; i < adapter->num_rx_queues; i++) {
1765 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1767 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1768 for (i-- ; i >= 0; i--)
1769 e1000_free_rx_resources(adapter,
1770 &adapter->rx_ring[i]);
1779 * e1000_setup_rctl - configure the receive control registers
1780 * @adapter: Board private structure
1782 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1784 struct e1000_hw *hw = &adapter->hw;
1789 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1791 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1792 E1000_RCTL_RDMTS_HALF |
1793 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1795 if (hw->tbi_compatibility_on == 1)
1796 rctl |= E1000_RCTL_SBP;
1798 rctl &= ~E1000_RCTL_SBP;
1800 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1801 rctl &= ~E1000_RCTL_LPE;
1803 rctl |= E1000_RCTL_LPE;
1805 /* Setup buffer sizes */
1806 rctl &= ~E1000_RCTL_SZ_4096;
1807 rctl |= E1000_RCTL_BSEX;
1808 switch (adapter->rx_buffer_len) {
1809 case E1000_RXBUFFER_2048:
1811 rctl |= E1000_RCTL_SZ_2048;
1812 rctl &= ~E1000_RCTL_BSEX;
1814 case E1000_RXBUFFER_4096:
1815 rctl |= E1000_RCTL_SZ_4096;
1817 case E1000_RXBUFFER_8192:
1818 rctl |= E1000_RCTL_SZ_8192;
1820 case E1000_RXBUFFER_16384:
1821 rctl |= E1000_RCTL_SZ_16384;
1825 /* This is useful for sniffing bad packets. */
1826 if (adapter->netdev->features & NETIF_F_RXALL) {
1827 /* UPE and MPE will be handled by normal PROMISC logic
1828 * in e1000e_set_rx_mode
1830 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
1831 E1000_RCTL_BAM | /* RX All Bcast Pkts */
1832 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
1834 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
1835 E1000_RCTL_DPF | /* Allow filtered pause */
1836 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
1837 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1838 * and that breaks VLANs.
1846 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1847 * @adapter: board private structure
1849 * Configure the Rx unit of the MAC after a reset.
1851 static void e1000_configure_rx(struct e1000_adapter *adapter)
1854 struct e1000_hw *hw = &adapter->hw;
1855 u32 rdlen, rctl, rxcsum;
1857 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1858 rdlen = adapter->rx_ring[0].count *
1859 sizeof(struct e1000_rx_desc);
1860 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1861 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1863 rdlen = adapter->rx_ring[0].count *
1864 sizeof(struct e1000_rx_desc);
1865 adapter->clean_rx = e1000_clean_rx_irq;
1866 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1869 /* disable receives while setting up the descriptors */
1871 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1873 /* set the Receive Delay Timer Register */
1874 ew32(RDTR, adapter->rx_int_delay);
1876 if (hw->mac_type >= e1000_82540) {
1877 ew32(RADV, adapter->rx_abs_int_delay);
1878 if (adapter->itr_setting != 0)
1879 ew32(ITR, 1000000000 / (adapter->itr * 256));
1882 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1883 * the Base and Length of the Rx Descriptor Ring
1885 switch (adapter->num_rx_queues) {
1888 rdba = adapter->rx_ring[0].dma;
1890 ew32(RDBAH, (rdba >> 32));
1891 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1894 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ?
1895 E1000_RDH : E1000_82542_RDH);
1896 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ?
1897 E1000_RDT : E1000_82542_RDT);
1901 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1902 if (hw->mac_type >= e1000_82543) {
1903 rxcsum = er32(RXCSUM);
1904 if (adapter->rx_csum)
1905 rxcsum |= E1000_RXCSUM_TUOFL;
1907 /* don't need to clear IPPCSE as it defaults to 0 */
1908 rxcsum &= ~E1000_RXCSUM_TUOFL;
1909 ew32(RXCSUM, rxcsum);
1912 /* Enable Receives */
1913 ew32(RCTL, rctl | E1000_RCTL_EN);
1917 * e1000_free_tx_resources - Free Tx Resources per Queue
1918 * @adapter: board private structure
1919 * @tx_ring: Tx descriptor ring for a specific queue
1921 * Free all transmit software resources
1923 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1924 struct e1000_tx_ring *tx_ring)
1926 struct pci_dev *pdev = adapter->pdev;
1928 e1000_clean_tx_ring(adapter, tx_ring);
1930 vfree(tx_ring->buffer_info);
1931 tx_ring->buffer_info = NULL;
1933 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1936 tx_ring->desc = NULL;
1940 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1941 * @adapter: board private structure
1943 * Free all transmit software resources
1945 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1949 for (i = 0; i < adapter->num_tx_queues; i++)
1950 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1953 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1954 struct e1000_buffer *buffer_info)
1956 if (buffer_info->dma) {
1957 if (buffer_info->mapped_as_page)
1958 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1959 buffer_info->length, DMA_TO_DEVICE);
1961 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1962 buffer_info->length,
1964 buffer_info->dma = 0;
1966 if (buffer_info->skb) {
1967 dev_kfree_skb_any(buffer_info->skb);
1968 buffer_info->skb = NULL;
1970 buffer_info->time_stamp = 0;
1971 /* buffer_info must be completely set up in the transmit path */
1975 * e1000_clean_tx_ring - Free Tx Buffers
1976 * @adapter: board private structure
1977 * @tx_ring: ring to be cleaned
1979 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1980 struct e1000_tx_ring *tx_ring)
1982 struct e1000_hw *hw = &adapter->hw;
1983 struct e1000_buffer *buffer_info;
1987 /* Free all the Tx ring sk_buffs */
1989 for (i = 0; i < tx_ring->count; i++) {
1990 buffer_info = &tx_ring->buffer_info[i];
1991 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1994 netdev_reset_queue(adapter->netdev);
1995 size = sizeof(struct e1000_buffer) * tx_ring->count;
1996 memset(tx_ring->buffer_info, 0, size);
1998 /* Zero out the descriptor ring */
2000 memset(tx_ring->desc, 0, tx_ring->size);
2002 tx_ring->next_to_use = 0;
2003 tx_ring->next_to_clean = 0;
2004 tx_ring->last_tx_tso = false;
2006 writel(0, hw->hw_addr + tx_ring->tdh);
2007 writel(0, hw->hw_addr + tx_ring->tdt);
2011 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2012 * @adapter: board private structure
2014 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2018 for (i = 0; i < adapter->num_tx_queues; i++)
2019 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2023 * e1000_free_rx_resources - Free Rx Resources
2024 * @adapter: board private structure
2025 * @rx_ring: ring to clean the resources from
2027 * Free all receive software resources
2029 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2030 struct e1000_rx_ring *rx_ring)
2032 struct pci_dev *pdev = adapter->pdev;
2034 e1000_clean_rx_ring(adapter, rx_ring);
2036 vfree(rx_ring->buffer_info);
2037 rx_ring->buffer_info = NULL;
2039 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2042 rx_ring->desc = NULL;
2046 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2047 * @adapter: board private structure
2049 * Free all receive software resources
2051 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2055 for (i = 0; i < adapter->num_rx_queues; i++)
2056 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2060 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2061 * @adapter: board private structure
2062 * @rx_ring: ring to free buffers from
2064 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2065 struct e1000_rx_ring *rx_ring)
2067 struct e1000_hw *hw = &adapter->hw;
2068 struct e1000_buffer *buffer_info;
2069 struct pci_dev *pdev = adapter->pdev;
2073 /* Free all the Rx ring sk_buffs */
2074 for (i = 0; i < rx_ring->count; i++) {
2075 buffer_info = &rx_ring->buffer_info[i];
2076 if (buffer_info->dma &&
2077 adapter->clean_rx == e1000_clean_rx_irq) {
2078 dma_unmap_single(&pdev->dev, buffer_info->dma,
2079 buffer_info->length,
2081 } else if (buffer_info->dma &&
2082 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2083 dma_unmap_page(&pdev->dev, buffer_info->dma,
2084 buffer_info->length,
2088 buffer_info->dma = 0;
2089 if (buffer_info->page) {
2090 put_page(buffer_info->page);
2091 buffer_info->page = NULL;
2093 if (buffer_info->skb) {
2094 dev_kfree_skb(buffer_info->skb);
2095 buffer_info->skb = NULL;
2099 /* there also may be some cached data from a chained receive */
2100 if (rx_ring->rx_skb_top) {
2101 dev_kfree_skb(rx_ring->rx_skb_top);
2102 rx_ring->rx_skb_top = NULL;
2105 size = sizeof(struct e1000_buffer) * rx_ring->count;
2106 memset(rx_ring->buffer_info, 0, size);
2108 /* Zero out the descriptor ring */
2109 memset(rx_ring->desc, 0, rx_ring->size);
2111 rx_ring->next_to_clean = 0;
2112 rx_ring->next_to_use = 0;
2114 writel(0, hw->hw_addr + rx_ring->rdh);
2115 writel(0, hw->hw_addr + rx_ring->rdt);
2119 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2120 * @adapter: board private structure
2122 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2126 for (i = 0; i < adapter->num_rx_queues; i++)
2127 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2130 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2131 * and memory write and invalidate disabled for certain operations
2133 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2135 struct e1000_hw *hw = &adapter->hw;
2136 struct net_device *netdev = adapter->netdev;
2139 e1000_pci_clear_mwi(hw);
2142 rctl |= E1000_RCTL_RST;
2144 E1000_WRITE_FLUSH();
2147 if (netif_running(netdev))
2148 e1000_clean_all_rx_rings(adapter);
2151 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2153 struct e1000_hw *hw = &adapter->hw;
2154 struct net_device *netdev = adapter->netdev;
2158 rctl &= ~E1000_RCTL_RST;
2160 E1000_WRITE_FLUSH();
2163 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2164 e1000_pci_set_mwi(hw);
2166 if (netif_running(netdev)) {
2167 /* No need to loop, because 82542 supports only 1 queue */
2168 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2169 e1000_configure_rx(adapter);
2170 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2175 * e1000_set_mac - Change the Ethernet Address of the NIC
2176 * @netdev: network interface device structure
2177 * @p: pointer to an address structure
2179 * Returns 0 on success, negative on failure
2181 static int e1000_set_mac(struct net_device *netdev, void *p)
2183 struct e1000_adapter *adapter = netdev_priv(netdev);
2184 struct e1000_hw *hw = &adapter->hw;
2185 struct sockaddr *addr = p;
2187 if (!is_valid_ether_addr(addr->sa_data))
2188 return -EADDRNOTAVAIL;
2190 /* 82542 2.0 needs to be in reset to write receive address registers */
2192 if (hw->mac_type == e1000_82542_rev2_0)
2193 e1000_enter_82542_rst(adapter);
2195 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2196 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2198 e1000_rar_set(hw, hw->mac_addr, 0);
2200 if (hw->mac_type == e1000_82542_rev2_0)
2201 e1000_leave_82542_rst(adapter);
2207 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2208 * @netdev: network interface device structure
2210 * The set_rx_mode entry point is called whenever the unicast or multicast
2211 * address lists or the network interface flags are updated. This routine is
2212 * responsible for configuring the hardware for proper unicast, multicast,
2213 * promiscuous mode, and all-multi behavior.
2215 static void e1000_set_rx_mode(struct net_device *netdev)
2217 struct e1000_adapter *adapter = netdev_priv(netdev);
2218 struct e1000_hw *hw = &adapter->hw;
2219 struct netdev_hw_addr *ha;
2220 bool use_uc = false;
2223 int i, rar_entries = E1000_RAR_ENTRIES;
2224 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2225 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2230 /* Check for Promiscuous and All Multicast modes */
2234 if (netdev->flags & IFF_PROMISC) {
2235 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2236 rctl &= ~E1000_RCTL_VFE;
2238 if (netdev->flags & IFF_ALLMULTI)
2239 rctl |= E1000_RCTL_MPE;
2241 rctl &= ~E1000_RCTL_MPE;
2242 /* Enable VLAN filter if there is a VLAN */
2243 if (e1000_vlan_used(adapter))
2244 rctl |= E1000_RCTL_VFE;
2247 if (netdev_uc_count(netdev) > rar_entries - 1) {
2248 rctl |= E1000_RCTL_UPE;
2249 } else if (!(netdev->flags & IFF_PROMISC)) {
2250 rctl &= ~E1000_RCTL_UPE;
2256 /* 82542 2.0 needs to be in reset to write receive address registers */
2258 if (hw->mac_type == e1000_82542_rev2_0)
2259 e1000_enter_82542_rst(adapter);
2261 /* load the first 14 addresses into the exact filters 1-14. Unicast
2262 * addresses take precedence to avoid disabling unicast filtering
2265 * RAR 0 is used for the station MAC address
2266 * if there are not 14 addresses, go ahead and clear the filters
2270 netdev_for_each_uc_addr(ha, netdev) {
2271 if (i == rar_entries)
2273 e1000_rar_set(hw, ha->addr, i++);
2276 netdev_for_each_mc_addr(ha, netdev) {
2277 if (i == rar_entries) {
2278 /* load any remaining addresses into the hash table */
2279 u32 hash_reg, hash_bit, mta;
2280 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2281 hash_reg = (hash_value >> 5) & 0x7F;
2282 hash_bit = hash_value & 0x1F;
2283 mta = (1 << hash_bit);
2284 mcarray[hash_reg] |= mta;
2286 e1000_rar_set(hw, ha->addr, i++);
2290 for (; i < rar_entries; i++) {
2291 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2292 E1000_WRITE_FLUSH();
2293 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2294 E1000_WRITE_FLUSH();
2297 /* write the hash table completely, write from bottom to avoid
2298 * both stupid write combining chipsets, and flushing each write
2300 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2301 /* If we are on an 82544 has an errata where writing odd
2302 * offsets overwrites the previous even offset, but writing
2303 * backwards over the range solves the issue by always
2304 * writing the odd offset first
2306 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2308 E1000_WRITE_FLUSH();
2310 if (hw->mac_type == e1000_82542_rev2_0)
2311 e1000_leave_82542_rst(adapter);
2317 * e1000_update_phy_info_task - get phy info
2318 * @work: work struct contained inside adapter struct
2320 * Need to wait a few seconds after link up to get diagnostic information from
2323 static void e1000_update_phy_info_task(struct work_struct *work)
2325 struct e1000_adapter *adapter = container_of(work,
2326 struct e1000_adapter,
2327 phy_info_task.work);
2328 if (test_bit(__E1000_DOWN, &adapter->flags))
2330 mutex_lock(&adapter->mutex);
2331 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2332 mutex_unlock(&adapter->mutex);
2336 * e1000_82547_tx_fifo_stall_task - task to complete work
2337 * @work: work struct contained inside adapter struct
2339 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2341 struct e1000_adapter *adapter = container_of(work,
2342 struct e1000_adapter,
2343 fifo_stall_task.work);
2344 struct e1000_hw *hw = &adapter->hw;
2345 struct net_device *netdev = adapter->netdev;
2348 if (test_bit(__E1000_DOWN, &adapter->flags))
2350 mutex_lock(&adapter->mutex);
2351 if (atomic_read(&adapter->tx_fifo_stall)) {
2352 if ((er32(TDT) == er32(TDH)) &&
2353 (er32(TDFT) == er32(TDFH)) &&
2354 (er32(TDFTS) == er32(TDFHS))) {
2356 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2357 ew32(TDFT, adapter->tx_head_addr);
2358 ew32(TDFH, adapter->tx_head_addr);
2359 ew32(TDFTS, adapter->tx_head_addr);
2360 ew32(TDFHS, adapter->tx_head_addr);
2362 E1000_WRITE_FLUSH();
2364 adapter->tx_fifo_head = 0;
2365 atomic_set(&adapter->tx_fifo_stall, 0);
2366 netif_wake_queue(netdev);
2367 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2368 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2371 mutex_unlock(&adapter->mutex);
2374 bool e1000_has_link(struct e1000_adapter *adapter)
2376 struct e1000_hw *hw = &adapter->hw;
2377 bool link_active = false;
2379 /* get_link_status is set on LSC (link status) interrupt or rx
2380 * sequence error interrupt (except on intel ce4100).
2381 * get_link_status will stay false until the
2382 * e1000_check_for_link establishes link for copper adapters
2385 switch (hw->media_type) {
2386 case e1000_media_type_copper:
2387 if (hw->mac_type == e1000_ce4100)
2388 hw->get_link_status = 1;
2389 if (hw->get_link_status) {
2390 e1000_check_for_link(hw);
2391 link_active = !hw->get_link_status;
2396 case e1000_media_type_fiber:
2397 e1000_check_for_link(hw);
2398 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2400 case e1000_media_type_internal_serdes:
2401 e1000_check_for_link(hw);
2402 link_active = hw->serdes_has_link;
2412 * e1000_watchdog - work function
2413 * @work: work struct contained inside adapter struct
2415 static void e1000_watchdog(struct work_struct *work)
2417 struct e1000_adapter *adapter = container_of(work,
2418 struct e1000_adapter,
2419 watchdog_task.work);
2420 struct e1000_hw *hw = &adapter->hw;
2421 struct net_device *netdev = adapter->netdev;
2422 struct e1000_tx_ring *txdr = adapter->tx_ring;
2425 if (test_bit(__E1000_DOWN, &adapter->flags))
2428 mutex_lock(&adapter->mutex);
2429 link = e1000_has_link(adapter);
2430 if ((netif_carrier_ok(netdev)) && link)
2434 if (!netif_carrier_ok(netdev)) {
2437 /* update snapshot of PHY registers on LSC */
2438 e1000_get_speed_and_duplex(hw,
2439 &adapter->link_speed,
2440 &adapter->link_duplex);
2443 pr_info("%s NIC Link is Up %d Mbps %s, "
2444 "Flow Control: %s\n",
2446 adapter->link_speed,
2447 adapter->link_duplex == FULL_DUPLEX ?
2448 "Full Duplex" : "Half Duplex",
2449 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2450 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2451 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2452 E1000_CTRL_TFCE) ? "TX" : "None")));
2454 /* adjust timeout factor according to speed/duplex */
2455 adapter->tx_timeout_factor = 1;
2456 switch (adapter->link_speed) {
2459 adapter->tx_timeout_factor = 16;
2463 /* maybe add some timeout factor ? */
2467 /* enable transmits in the hardware */
2469 tctl |= E1000_TCTL_EN;
2472 netif_carrier_on(netdev);
2473 if (!test_bit(__E1000_DOWN, &adapter->flags))
2474 schedule_delayed_work(&adapter->phy_info_task,
2476 adapter->smartspeed = 0;
2479 if (netif_carrier_ok(netdev)) {
2480 adapter->link_speed = 0;
2481 adapter->link_duplex = 0;
2482 pr_info("%s NIC Link is Down\n",
2484 netif_carrier_off(netdev);
2486 if (!test_bit(__E1000_DOWN, &adapter->flags))
2487 schedule_delayed_work(&adapter->phy_info_task,
2491 e1000_smartspeed(adapter);
2495 e1000_update_stats(adapter);
2497 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2498 adapter->tpt_old = adapter->stats.tpt;
2499 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2500 adapter->colc_old = adapter->stats.colc;
2502 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2503 adapter->gorcl_old = adapter->stats.gorcl;
2504 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2505 adapter->gotcl_old = adapter->stats.gotcl;
2507 e1000_update_adaptive(hw);
2509 if (!netif_carrier_ok(netdev)) {
2510 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2511 /* We've lost link, so the controller stops DMA,
2512 * but we've got queued Tx work that's never going
2513 * to get done, so reset controller to flush Tx.
2514 * (Do the reset outside of interrupt context).
2516 adapter->tx_timeout_count++;
2517 schedule_work(&adapter->reset_task);
2518 /* exit immediately since reset is imminent */
2523 /* Simple mode for Interrupt Throttle Rate (ITR) */
2524 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2525 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2526 * Total asymmetrical Tx or Rx gets ITR=8000;
2527 * everyone else is between 2000-8000.
2529 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2530 u32 dif = (adapter->gotcl > adapter->gorcl ?
2531 adapter->gotcl - adapter->gorcl :
2532 adapter->gorcl - adapter->gotcl) / 10000;
2533 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2535 ew32(ITR, 1000000000 / (itr * 256));
2538 /* Cause software interrupt to ensure rx ring is cleaned */
2539 ew32(ICS, E1000_ICS_RXDMT0);
2541 /* Force detection of hung controller every watchdog period */
2542 adapter->detect_tx_hung = true;
2544 /* Reschedule the task */
2545 if (!test_bit(__E1000_DOWN, &adapter->flags))
2546 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2549 mutex_unlock(&adapter->mutex);
2552 enum latency_range {
2556 latency_invalid = 255
2560 * e1000_update_itr - update the dynamic ITR value based on statistics
2561 * @adapter: pointer to adapter
2562 * @itr_setting: current adapter->itr
2563 * @packets: the number of packets during this measurement interval
2564 * @bytes: the number of bytes during this measurement interval
2566 * Stores a new ITR value based on packets and byte
2567 * counts during the last interrupt. The advantage of per interrupt
2568 * computation is faster updates and more accurate ITR for the current
2569 * traffic pattern. Constants in this function were computed
2570 * based on theoretical maximum wire speed and thresholds were set based
2571 * on testing data as well as attempting to minimize response time
2572 * while increasing bulk throughput.
2573 * this functionality is controlled by the InterruptThrottleRate module
2574 * parameter (see e1000_param.c)
2576 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2577 u16 itr_setting, int packets, int bytes)
2579 unsigned int retval = itr_setting;
2580 struct e1000_hw *hw = &adapter->hw;
2582 if (unlikely(hw->mac_type < e1000_82540))
2583 goto update_itr_done;
2586 goto update_itr_done;
2588 switch (itr_setting) {
2589 case lowest_latency:
2590 /* jumbo frames get bulk treatment*/
2591 if (bytes/packets > 8000)
2592 retval = bulk_latency;
2593 else if ((packets < 5) && (bytes > 512))
2594 retval = low_latency;
2596 case low_latency: /* 50 usec aka 20000 ints/s */
2597 if (bytes > 10000) {
2598 /* jumbo frames need bulk latency setting */
2599 if (bytes/packets > 8000)
2600 retval = bulk_latency;
2601 else if ((packets < 10) || ((bytes/packets) > 1200))
2602 retval = bulk_latency;
2603 else if ((packets > 35))
2604 retval = lowest_latency;
2605 } else if (bytes/packets > 2000)
2606 retval = bulk_latency;
2607 else if (packets <= 2 && bytes < 512)
2608 retval = lowest_latency;
2610 case bulk_latency: /* 250 usec aka 4000 ints/s */
2611 if (bytes > 25000) {
2613 retval = low_latency;
2614 } else if (bytes < 6000) {
2615 retval = low_latency;
2624 static void e1000_set_itr(struct e1000_adapter *adapter)
2626 struct e1000_hw *hw = &adapter->hw;
2628 u32 new_itr = adapter->itr;
2630 if (unlikely(hw->mac_type < e1000_82540))
2633 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2634 if (unlikely(adapter->link_speed != SPEED_1000)) {
2640 adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr,
2641 adapter->total_tx_packets,
2642 adapter->total_tx_bytes);
2643 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2644 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2645 adapter->tx_itr = low_latency;
2647 adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr,
2648 adapter->total_rx_packets,
2649 adapter->total_rx_bytes);
2650 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2651 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2652 adapter->rx_itr = low_latency;
2654 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2656 switch (current_itr) {
2657 /* counts and packets in update_itr are dependent on these numbers */
2658 case lowest_latency:
2662 new_itr = 20000; /* aka hwitr = ~200 */
2672 if (new_itr != adapter->itr) {
2673 /* this attempts to bias the interrupt rate towards Bulk
2674 * by adding intermediate steps when interrupt rate is
2677 new_itr = new_itr > adapter->itr ?
2678 min(adapter->itr + (new_itr >> 2), new_itr) :
2680 adapter->itr = new_itr;
2681 ew32(ITR, 1000000000 / (new_itr * 256));
2685 #define E1000_TX_FLAGS_CSUM 0x00000001
2686 #define E1000_TX_FLAGS_VLAN 0x00000002
2687 #define E1000_TX_FLAGS_TSO 0x00000004
2688 #define E1000_TX_FLAGS_IPV4 0x00000008
2689 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2690 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2691 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2693 static int e1000_tso(struct e1000_adapter *adapter,
2694 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2696 struct e1000_context_desc *context_desc;
2697 struct e1000_buffer *buffer_info;
2700 u16 ipcse = 0, tucse, mss;
2701 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2704 if (skb_is_gso(skb)) {
2705 if (skb_header_cloned(skb)) {
2706 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2711 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2712 mss = skb_shinfo(skb)->gso_size;
2713 if (skb->protocol == htons(ETH_P_IP)) {
2714 struct iphdr *iph = ip_hdr(skb);
2717 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2721 cmd_length = E1000_TXD_CMD_IP;
2722 ipcse = skb_transport_offset(skb) - 1;
2723 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2724 ipv6_hdr(skb)->payload_len = 0;
2725 tcp_hdr(skb)->check =
2726 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2727 &ipv6_hdr(skb)->daddr,
2731 ipcss = skb_network_offset(skb);
2732 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2733 tucss = skb_transport_offset(skb);
2734 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2737 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2738 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2740 i = tx_ring->next_to_use;
2741 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2742 buffer_info = &tx_ring->buffer_info[i];
2744 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2745 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2746 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2747 context_desc->upper_setup.tcp_fields.tucss = tucss;
2748 context_desc->upper_setup.tcp_fields.tucso = tucso;
2749 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2750 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2751 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2752 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2754 buffer_info->time_stamp = jiffies;
2755 buffer_info->next_to_watch = i;
2757 if (++i == tx_ring->count) i = 0;
2758 tx_ring->next_to_use = i;
2765 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2766 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2768 struct e1000_context_desc *context_desc;
2769 struct e1000_buffer *buffer_info;
2772 u32 cmd_len = E1000_TXD_CMD_DEXT;
2774 if (skb->ip_summed != CHECKSUM_PARTIAL)
2777 switch (skb->protocol) {
2778 case cpu_to_be16(ETH_P_IP):
2779 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2780 cmd_len |= E1000_TXD_CMD_TCP;
2782 case cpu_to_be16(ETH_P_IPV6):
2783 /* XXX not handling all IPV6 headers */
2784 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2785 cmd_len |= E1000_TXD_CMD_TCP;
2788 if (unlikely(net_ratelimit()))
2789 e_warn(drv, "checksum_partial proto=%x!\n",
2794 css = skb_checksum_start_offset(skb);
2796 i = tx_ring->next_to_use;
2797 buffer_info = &tx_ring->buffer_info[i];
2798 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2800 context_desc->lower_setup.ip_config = 0;
2801 context_desc->upper_setup.tcp_fields.tucss = css;
2802 context_desc->upper_setup.tcp_fields.tucso =
2803 css + skb->csum_offset;
2804 context_desc->upper_setup.tcp_fields.tucse = 0;
2805 context_desc->tcp_seg_setup.data = 0;
2806 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2808 buffer_info->time_stamp = jiffies;
2809 buffer_info->next_to_watch = i;
2811 if (unlikely(++i == tx_ring->count)) i = 0;
2812 tx_ring->next_to_use = i;
2817 #define E1000_MAX_TXD_PWR 12
2818 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2820 static int e1000_tx_map(struct e1000_adapter *adapter,
2821 struct e1000_tx_ring *tx_ring,
2822 struct sk_buff *skb, unsigned int first,
2823 unsigned int max_per_txd, unsigned int nr_frags,
2826 struct e1000_hw *hw = &adapter->hw;
2827 struct pci_dev *pdev = adapter->pdev;
2828 struct e1000_buffer *buffer_info;
2829 unsigned int len = skb_headlen(skb);
2830 unsigned int offset = 0, size, count = 0, i;
2831 unsigned int f, bytecount, segs;
2833 i = tx_ring->next_to_use;
2836 buffer_info = &tx_ring->buffer_info[i];
2837 size = min(len, max_per_txd);
2838 /* Workaround for Controller erratum --
2839 * descriptor for non-tso packet in a linear SKB that follows a
2840 * tso gets written back prematurely before the data is fully
2841 * DMA'd to the controller
2843 if (!skb->data_len && tx_ring->last_tx_tso &&
2845 tx_ring->last_tx_tso = false;
2849 /* Workaround for premature desc write-backs
2850 * in TSO mode. Append 4-byte sentinel desc
2852 if (unlikely(mss && !nr_frags && size == len && size > 8))
2854 /* work-around for errata 10 and it applies
2855 * to all controllers in PCI-X mode
2856 * The fix is to make sure that the first descriptor of a
2857 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2859 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2860 (size > 2015) && count == 0))
2863 /* Workaround for potential 82544 hang in PCI-X. Avoid
2864 * terminating buffers within evenly-aligned dwords.
2866 if (unlikely(adapter->pcix_82544 &&
2867 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2871 buffer_info->length = size;
2872 /* set time_stamp *before* dma to help avoid a possible race */
2873 buffer_info->time_stamp = jiffies;
2874 buffer_info->mapped_as_page = false;
2875 buffer_info->dma = dma_map_single(&pdev->dev,
2877 size, DMA_TO_DEVICE);
2878 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2880 buffer_info->next_to_watch = i;
2887 if (unlikely(i == tx_ring->count))
2892 for (f = 0; f < nr_frags; f++) {
2893 const struct skb_frag_struct *frag;
2895 frag = &skb_shinfo(skb)->frags[f];
2896 len = skb_frag_size(frag);
2900 unsigned long bufend;
2902 if (unlikely(i == tx_ring->count))
2905 buffer_info = &tx_ring->buffer_info[i];
2906 size = min(len, max_per_txd);
2907 /* Workaround for premature desc write-backs
2908 * in TSO mode. Append 4-byte sentinel desc
2910 if (unlikely(mss && f == (nr_frags-1) &&
2911 size == len && size > 8))
2913 /* Workaround for potential 82544 hang in PCI-X.
2914 * Avoid terminating buffers within evenly-aligned
2917 bufend = (unsigned long)
2918 page_to_phys(skb_frag_page(frag));
2919 bufend += offset + size - 1;
2920 if (unlikely(adapter->pcix_82544 &&
2925 buffer_info->length = size;
2926 buffer_info->time_stamp = jiffies;
2927 buffer_info->mapped_as_page = true;
2928 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2929 offset, size, DMA_TO_DEVICE);
2930 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2932 buffer_info->next_to_watch = i;
2940 segs = skb_shinfo(skb)->gso_segs ?: 1;
2941 /* multiply data chunks by size of headers */
2942 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2944 tx_ring->buffer_info[i].skb = skb;
2945 tx_ring->buffer_info[i].segs = segs;
2946 tx_ring->buffer_info[i].bytecount = bytecount;
2947 tx_ring->buffer_info[first].next_to_watch = i;
2952 dev_err(&pdev->dev, "TX DMA map failed\n");
2953 buffer_info->dma = 0;
2959 i += tx_ring->count;
2961 buffer_info = &tx_ring->buffer_info[i];
2962 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2968 static void e1000_tx_queue(struct e1000_adapter *adapter,
2969 struct e1000_tx_ring *tx_ring, int tx_flags,
2972 struct e1000_hw *hw = &adapter->hw;
2973 struct e1000_tx_desc *tx_desc = NULL;
2974 struct e1000_buffer *buffer_info;
2975 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2978 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2979 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2981 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2983 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2984 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2987 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2988 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2989 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2992 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2993 txd_lower |= E1000_TXD_CMD_VLE;
2994 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2997 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
2998 txd_lower &= ~(E1000_TXD_CMD_IFCS);
3000 i = tx_ring->next_to_use;
3003 buffer_info = &tx_ring->buffer_info[i];
3004 tx_desc = E1000_TX_DESC(*tx_ring, i);
3005 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3006 tx_desc->lower.data =
3007 cpu_to_le32(txd_lower | buffer_info->length);
3008 tx_desc->upper.data = cpu_to_le32(txd_upper);
3009 if (unlikely(++i == tx_ring->count)) i = 0;
3012 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3014 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3015 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3016 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3018 /* Force memory writes to complete before letting h/w
3019 * know there are new descriptors to fetch. (Only
3020 * applicable for weak-ordered memory model archs,
3025 tx_ring->next_to_use = i;
3026 writel(i, hw->hw_addr + tx_ring->tdt);
3027 /* we need this if more than one processor can write to our tail
3028 * at a time, it synchronizes IO on IA64/Altix systems
3033 /* 82547 workaround to avoid controller hang in half-duplex environment.
3034 * The workaround is to avoid queuing a large packet that would span
3035 * the internal Tx FIFO ring boundary by notifying the stack to resend
3036 * the packet at a later time. This gives the Tx FIFO an opportunity to
3037 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3038 * to the beginning of the Tx FIFO.
3041 #define E1000_FIFO_HDR 0x10
3042 #define E1000_82547_PAD_LEN 0x3E0
3044 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3045 struct sk_buff *skb)
3047 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3048 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3050 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3052 if (adapter->link_duplex != HALF_DUPLEX)
3053 goto no_fifo_stall_required;
3055 if (atomic_read(&adapter->tx_fifo_stall))
3058 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3059 atomic_set(&adapter->tx_fifo_stall, 1);
3063 no_fifo_stall_required:
3064 adapter->tx_fifo_head += skb_fifo_len;
3065 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3066 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3070 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3072 struct e1000_adapter *adapter = netdev_priv(netdev);
3073 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3075 netif_stop_queue(netdev);
3076 /* Herbert's original patch had:
3077 * smp_mb__after_netif_stop_queue();
3078 * but since that doesn't exist yet, just open code it.
3082 /* We need to check again in a case another CPU has just
3083 * made room available.
3085 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3089 netif_start_queue(netdev);
3090 ++adapter->restart_queue;
3094 static int e1000_maybe_stop_tx(struct net_device *netdev,
3095 struct e1000_tx_ring *tx_ring, int size)
3097 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3099 return __e1000_maybe_stop_tx(netdev, size);
3102 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3103 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3104 struct net_device *netdev)
3106 struct e1000_adapter *adapter = netdev_priv(netdev);
3107 struct e1000_hw *hw = &adapter->hw;
3108 struct e1000_tx_ring *tx_ring;
3109 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3110 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3111 unsigned int tx_flags = 0;
3112 unsigned int len = skb_headlen(skb);
3113 unsigned int nr_frags;
3119 /* This goes back to the question of how to logically map a Tx queue
3120 * to a flow. Right now, performance is impacted slightly negatively
3121 * if using multiple Tx queues. If the stack breaks away from a
3122 * single qdisc implementation, we can look at this again.
3124 tx_ring = adapter->tx_ring;
3126 if (unlikely(skb->len <= 0)) {
3127 dev_kfree_skb_any(skb);
3128 return NETDEV_TX_OK;
3131 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3132 * packets may get corrupted during padding by HW.
3133 * To WA this issue, pad all small packets manually.
3135 if (skb->len < ETH_ZLEN) {
3136 if (skb_pad(skb, ETH_ZLEN - skb->len))
3137 return NETDEV_TX_OK;
3138 skb->len = ETH_ZLEN;
3139 skb_set_tail_pointer(skb, ETH_ZLEN);
3142 mss = skb_shinfo(skb)->gso_size;
3143 /* The controller does a simple calculation to
3144 * make sure there is enough room in the FIFO before
3145 * initiating the DMA for each buffer. The calc is:
3146 * 4 = ceil(buffer len/mss). To make sure we don't
3147 * overrun the FIFO, adjust the max buffer len if mss
3152 max_per_txd = min(mss << 2, max_per_txd);
3153 max_txd_pwr = fls(max_per_txd) - 1;
3155 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3156 if (skb->data_len && hdr_len == len) {
3157 switch (hw->mac_type) {
3158 unsigned int pull_size;
3160 /* Make sure we have room to chop off 4 bytes,
3161 * and that the end alignment will work out to
3162 * this hardware's requirements
3163 * NOTE: this is a TSO only workaround
3164 * if end byte alignment not correct move us
3165 * into the next dword
3167 if ((unsigned long)(skb_tail_pointer(skb) - 1)
3171 pull_size = min((unsigned int)4, skb->data_len);
3172 if (!__pskb_pull_tail(skb, pull_size)) {
3173 e_err(drv, "__pskb_pull_tail "
3175 dev_kfree_skb_any(skb);
3176 return NETDEV_TX_OK;
3178 len = skb_headlen(skb);
3187 /* reserve a descriptor for the offload context */
3188 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3192 /* Controller Erratum workaround */
3193 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3196 count += TXD_USE_COUNT(len, max_txd_pwr);
3198 if (adapter->pcix_82544)
3201 /* work-around for errata 10 and it applies to all controllers
3202 * in PCI-X mode, so add one more descriptor to the count
3204 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3208 nr_frags = skb_shinfo(skb)->nr_frags;
3209 for (f = 0; f < nr_frags; f++)
3210 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3212 if (adapter->pcix_82544)
3215 /* need: count + 2 desc gap to keep tail from touching
3216 * head, otherwise try next time
3218 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3219 return NETDEV_TX_BUSY;
3221 if (unlikely((hw->mac_type == e1000_82547) &&
3222 (e1000_82547_fifo_workaround(adapter, skb)))) {
3223 netif_stop_queue(netdev);
3224 if (!test_bit(__E1000_DOWN, &adapter->flags))
3225 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3226 return NETDEV_TX_BUSY;
3229 if (vlan_tx_tag_present(skb)) {
3230 tx_flags |= E1000_TX_FLAGS_VLAN;
3231 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3234 first = tx_ring->next_to_use;
3236 tso = e1000_tso(adapter, tx_ring, skb);
3238 dev_kfree_skb_any(skb);
3239 return NETDEV_TX_OK;
3243 if (likely(hw->mac_type != e1000_82544))
3244 tx_ring->last_tx_tso = true;
3245 tx_flags |= E1000_TX_FLAGS_TSO;
3246 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3247 tx_flags |= E1000_TX_FLAGS_CSUM;
3249 if (likely(skb->protocol == htons(ETH_P_IP)))
3250 tx_flags |= E1000_TX_FLAGS_IPV4;
3252 if (unlikely(skb->no_fcs))
3253 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3255 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3259 netdev_sent_queue(netdev, skb->len);
3260 skb_tx_timestamp(skb);
3262 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3263 /* Make sure there is space in the ring for the next send. */
3264 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3267 dev_kfree_skb_any(skb);
3268 tx_ring->buffer_info[first].time_stamp = 0;
3269 tx_ring->next_to_use = first;
3272 return NETDEV_TX_OK;
3275 #define NUM_REGS 38 /* 1 based count */
3276 static void e1000_regdump(struct e1000_adapter *adapter)
3278 struct e1000_hw *hw = &adapter->hw;
3280 u32 *regs_buff = regs;
3283 static const char * const reg_name[] = {
3285 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3286 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3287 "TIDV", "TXDCTL", "TADV", "TARC0",
3288 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3290 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3291 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3292 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3295 regs_buff[0] = er32(CTRL);
3296 regs_buff[1] = er32(STATUS);
3298 regs_buff[2] = er32(RCTL);
3299 regs_buff[3] = er32(RDLEN);
3300 regs_buff[4] = er32(RDH);
3301 regs_buff[5] = er32(RDT);
3302 regs_buff[6] = er32(RDTR);
3304 regs_buff[7] = er32(TCTL);
3305 regs_buff[8] = er32(TDBAL);
3306 regs_buff[9] = er32(TDBAH);
3307 regs_buff[10] = er32(TDLEN);
3308 regs_buff[11] = er32(TDH);
3309 regs_buff[12] = er32(TDT);
3310 regs_buff[13] = er32(TIDV);
3311 regs_buff[14] = er32(TXDCTL);
3312 regs_buff[15] = er32(TADV);
3313 regs_buff[16] = er32(TARC0);
3315 regs_buff[17] = er32(TDBAL1);
3316 regs_buff[18] = er32(TDBAH1);
3317 regs_buff[19] = er32(TDLEN1);
3318 regs_buff[20] = er32(TDH1);
3319 regs_buff[21] = er32(TDT1);
3320 regs_buff[22] = er32(TXDCTL1);
3321 regs_buff[23] = er32(TARC1);
3322 regs_buff[24] = er32(CTRL_EXT);
3323 regs_buff[25] = er32(ERT);
3324 regs_buff[26] = er32(RDBAL0);
3325 regs_buff[27] = er32(RDBAH0);
3326 regs_buff[28] = er32(TDFH);
3327 regs_buff[29] = er32(TDFT);
3328 regs_buff[30] = er32(TDFHS);
3329 regs_buff[31] = er32(TDFTS);
3330 regs_buff[32] = er32(TDFPC);
3331 regs_buff[33] = er32(RDFH);
3332 regs_buff[34] = er32(RDFT);
3333 regs_buff[35] = er32(RDFHS);
3334 regs_buff[36] = er32(RDFTS);
3335 regs_buff[37] = er32(RDFPC);
3337 pr_info("Register dump\n");
3338 for (i = 0; i < NUM_REGS; i++)
3339 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3343 * e1000_dump: Print registers, tx ring and rx ring
3345 static void e1000_dump(struct e1000_adapter *adapter)
3347 /* this code doesn't handle multiple rings */
3348 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3349 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3352 if (!netif_msg_hw(adapter))
3355 /* Print Registers */
3356 e1000_regdump(adapter);
3359 pr_info("TX Desc ring0 dump\n");
3361 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3363 * Legacy Transmit Descriptor
3364 * +--------------------------------------------------------------+
3365 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3366 * +--------------------------------------------------------------+
3367 * 8 | Special | CSS | Status | CMD | CSO | Length |
3368 * +--------------------------------------------------------------+
3369 * 63 48 47 36 35 32 31 24 23 16 15 0
3371 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3372 * 63 48 47 40 39 32 31 16 15 8 7 0
3373 * +----------------------------------------------------------------+
3374 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3375 * +----------------------------------------------------------------+
3376 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3377 * +----------------------------------------------------------------+
3378 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3380 * Extended Data Descriptor (DTYP=0x1)
3381 * +----------------------------------------------------------------+
3382 * 0 | Buffer Address [63:0] |
3383 * +----------------------------------------------------------------+
3384 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3385 * +----------------------------------------------------------------+
3386 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3388 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3389 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3391 if (!netif_msg_tx_done(adapter))
3392 goto rx_ring_summary;
3394 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3395 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3396 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
3397 struct my_u { __le64 a; __le64 b; };
3398 struct my_u *u = (struct my_u *)tx_desc;
3401 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3403 else if (i == tx_ring->next_to_use)
3405 else if (i == tx_ring->next_to_clean)
3410 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3411 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3412 le64_to_cpu(u->a), le64_to_cpu(u->b),
3413 (u64)buffer_info->dma, buffer_info->length,
3414 buffer_info->next_to_watch,
3415 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3420 pr_info("\nRX Desc ring dump\n");
3422 /* Legacy Receive Descriptor Format
3424 * +-----------------------------------------------------+
3425 * | Buffer Address [63:0] |
3426 * +-----------------------------------------------------+
3427 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3428 * +-----------------------------------------------------+
3429 * 63 48 47 40 39 32 31 16 15 0
3431 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3433 if (!netif_msg_rx_status(adapter))
3436 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3437 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3438 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i];
3439 struct my_u { __le64 a; __le64 b; };
3440 struct my_u *u = (struct my_u *)rx_desc;
3443 if (i == rx_ring->next_to_use)
3445 else if (i == rx_ring->next_to_clean)
3450 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3451 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3452 (u64)buffer_info->dma, buffer_info->skb, type);
3455 /* dump the descriptor caches */
3457 pr_info("Rx descriptor cache in 64bit format\n");
3458 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3459 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3461 readl(adapter->hw.hw_addr + i+4),
3462 readl(adapter->hw.hw_addr + i),
3463 readl(adapter->hw.hw_addr + i+12),
3464 readl(adapter->hw.hw_addr + i+8));
3467 pr_info("Tx descriptor cache in 64bit format\n");
3468 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3469 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3471 readl(adapter->hw.hw_addr + i+4),
3472 readl(adapter->hw.hw_addr + i),
3473 readl(adapter->hw.hw_addr + i+12),
3474 readl(adapter->hw.hw_addr + i+8));
3481 * e1000_tx_timeout - Respond to a Tx Hang
3482 * @netdev: network interface device structure
3484 static void e1000_tx_timeout(struct net_device *netdev)
3486 struct e1000_adapter *adapter = netdev_priv(netdev);
3488 /* Do the reset outside of interrupt context */
3489 adapter->tx_timeout_count++;
3490 schedule_work(&adapter->reset_task);
3493 static void e1000_reset_task(struct work_struct *work)
3495 struct e1000_adapter *adapter =
3496 container_of(work, struct e1000_adapter, reset_task);
3498 if (test_bit(__E1000_DOWN, &adapter->flags))
3500 e_err(drv, "Reset adapter\n");
3501 e1000_reinit_safe(adapter);
3505 * e1000_get_stats - Get System Network Statistics
3506 * @netdev: network interface device structure
3508 * Returns the address of the device statistics structure.
3509 * The statistics are actually updated from the watchdog.
3511 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3513 /* only return the current stats */
3514 return &netdev->stats;
3518 * e1000_change_mtu - Change the Maximum Transfer Unit
3519 * @netdev: network interface device structure
3520 * @new_mtu: new value for maximum frame size
3522 * Returns 0 on success, negative on failure
3524 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3526 struct e1000_adapter *adapter = netdev_priv(netdev);
3527 struct e1000_hw *hw = &adapter->hw;
3528 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3530 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3531 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3532 e_err(probe, "Invalid MTU setting\n");
3536 /* Adapter-specific max frame size limits. */
3537 switch (hw->mac_type) {
3538 case e1000_undefined ... e1000_82542_rev2_1:
3539 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3540 e_err(probe, "Jumbo Frames not supported.\n");
3545 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3549 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3551 /* e1000_down has a dependency on max_frame_size */
3552 hw->max_frame_size = max_frame;
3553 if (netif_running(netdev))
3554 e1000_down(adapter);
3556 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3557 * means we reserve 2 more, this pushes us to allocate from the next
3559 * i.e. RXBUFFER_2048 --> size-4096 slab
3560 * however with the new *_jumbo_rx* routines, jumbo receives will use
3564 if (max_frame <= E1000_RXBUFFER_2048)
3565 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3567 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3568 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3569 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3570 adapter->rx_buffer_len = PAGE_SIZE;
3573 /* adjust allocation if LPE protects us, and we aren't using SBP */
3574 if (!hw->tbi_compatibility_on &&
3575 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3576 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3577 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3579 pr_info("%s changing MTU from %d to %d\n",
3580 netdev->name, netdev->mtu, new_mtu);
3581 netdev->mtu = new_mtu;
3583 if (netif_running(netdev))
3586 e1000_reset(adapter);
3588 clear_bit(__E1000_RESETTING, &adapter->flags);
3594 * e1000_update_stats - Update the board statistics counters
3595 * @adapter: board private structure
3597 void e1000_update_stats(struct e1000_adapter *adapter)
3599 struct net_device *netdev = adapter->netdev;
3600 struct e1000_hw *hw = &adapter->hw;
3601 struct pci_dev *pdev = adapter->pdev;
3602 unsigned long flags;
3605 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3607 /* Prevent stats update while adapter is being reset, or if the pci
3608 * connection is down.
3610 if (adapter->link_speed == 0)
3612 if (pci_channel_offline(pdev))
3615 spin_lock_irqsave(&adapter->stats_lock, flags);
3617 /* these counters are modified from e1000_tbi_adjust_stats,
3618 * called from the interrupt context, so they must only
3619 * be written while holding adapter->stats_lock
3622 adapter->stats.crcerrs += er32(CRCERRS);
3623 adapter->stats.gprc += er32(GPRC);
3624 adapter->stats.gorcl += er32(GORCL);
3625 adapter->stats.gorch += er32(GORCH);
3626 adapter->stats.bprc += er32(BPRC);
3627 adapter->stats.mprc += er32(MPRC);
3628 adapter->stats.roc += er32(ROC);
3630 adapter->stats.prc64 += er32(PRC64);
3631 adapter->stats.prc127 += er32(PRC127);
3632 adapter->stats.prc255 += er32(PRC255);
3633 adapter->stats.prc511 += er32(PRC511);
3634 adapter->stats.prc1023 += er32(PRC1023);
3635 adapter->stats.prc1522 += er32(PRC1522);
3637 adapter->stats.symerrs += er32(SYMERRS);
3638 adapter->stats.mpc += er32(MPC);
3639 adapter->stats.scc += er32(SCC);
3640 adapter->stats.ecol += er32(ECOL);
3641 adapter->stats.mcc += er32(MCC);
3642 adapter->stats.latecol += er32(LATECOL);
3643 adapter->stats.dc += er32(DC);
3644 adapter->stats.sec += er32(SEC);
3645 adapter->stats.rlec += er32(RLEC);
3646 adapter->stats.xonrxc += er32(XONRXC);
3647 adapter->stats.xontxc += er32(XONTXC);
3648 adapter->stats.xoffrxc += er32(XOFFRXC);
3649 adapter->stats.xofftxc += er32(XOFFTXC);
3650 adapter->stats.fcruc += er32(FCRUC);
3651 adapter->stats.gptc += er32(GPTC);
3652 adapter->stats.gotcl += er32(GOTCL);
3653 adapter->stats.gotch += er32(GOTCH);
3654 adapter->stats.rnbc += er32(RNBC);
3655 adapter->stats.ruc += er32(RUC);
3656 adapter->stats.rfc += er32(RFC);
3657 adapter->stats.rjc += er32(RJC);
3658 adapter->stats.torl += er32(TORL);
3659 adapter->stats.torh += er32(TORH);
3660 adapter->stats.totl += er32(TOTL);
3661 adapter->stats.toth += er32(TOTH);
3662 adapter->stats.tpr += er32(TPR);
3664 adapter->stats.ptc64 += er32(PTC64);
3665 adapter->stats.ptc127 += er32(PTC127);
3666 adapter->stats.ptc255 += er32(PTC255);
3667 adapter->stats.ptc511 += er32(PTC511);
3668 adapter->stats.ptc1023 += er32(PTC1023);
3669 adapter->stats.ptc1522 += er32(PTC1522);
3671 adapter->stats.mptc += er32(MPTC);
3672 adapter->stats.bptc += er32(BPTC);
3674 /* used for adaptive IFS */
3676 hw->tx_packet_delta = er32(TPT);
3677 adapter->stats.tpt += hw->tx_packet_delta;
3678 hw->collision_delta = er32(COLC);
3679 adapter->stats.colc += hw->collision_delta;
3681 if (hw->mac_type >= e1000_82543) {
3682 adapter->stats.algnerrc += er32(ALGNERRC);
3683 adapter->stats.rxerrc += er32(RXERRC);
3684 adapter->stats.tncrs += er32(TNCRS);
3685 adapter->stats.cexterr += er32(CEXTERR);
3686 adapter->stats.tsctc += er32(TSCTC);
3687 adapter->stats.tsctfc += er32(TSCTFC);
3690 /* Fill out the OS statistics structure */
3691 netdev->stats.multicast = adapter->stats.mprc;
3692 netdev->stats.collisions = adapter->stats.colc;
3696 /* RLEC on some newer hardware can be incorrect so build
3697 * our own version based on RUC and ROC
3699 netdev->stats.rx_errors = adapter->stats.rxerrc +
3700 adapter->stats.crcerrs + adapter->stats.algnerrc +
3701 adapter->stats.ruc + adapter->stats.roc +
3702 adapter->stats.cexterr;
3703 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3704 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3705 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3706 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3707 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3710 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3711 netdev->stats.tx_errors = adapter->stats.txerrc;
3712 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3713 netdev->stats.tx_window_errors = adapter->stats.latecol;
3714 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3715 if (hw->bad_tx_carr_stats_fd &&
3716 adapter->link_duplex == FULL_DUPLEX) {
3717 netdev->stats.tx_carrier_errors = 0;
3718 adapter->stats.tncrs = 0;
3721 /* Tx Dropped needs to be maintained elsewhere */
3724 if (hw->media_type == e1000_media_type_copper) {
3725 if ((adapter->link_speed == SPEED_1000) &&
3726 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3727 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3728 adapter->phy_stats.idle_errors += phy_tmp;
3731 if ((hw->mac_type <= e1000_82546) &&
3732 (hw->phy_type == e1000_phy_m88) &&
3733 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3734 adapter->phy_stats.receive_errors += phy_tmp;
3737 /* Management Stats */
3738 if (hw->has_smbus) {
3739 adapter->stats.mgptc += er32(MGTPTC);
3740 adapter->stats.mgprc += er32(MGTPRC);
3741 adapter->stats.mgpdc += er32(MGTPDC);
3744 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3748 * e1000_intr - Interrupt Handler
3749 * @irq: interrupt number
3750 * @data: pointer to a network interface device structure
3752 static irqreturn_t e1000_intr(int irq, void *data)
3754 struct net_device *netdev = data;
3755 struct e1000_adapter *adapter = netdev_priv(netdev);
3756 struct e1000_hw *hw = &adapter->hw;
3757 u32 icr = er32(ICR);
3759 if (unlikely((!icr)))
3760 return IRQ_NONE; /* Not our interrupt */
3762 /* we might have caused the interrupt, but the above
3763 * read cleared it, and just in case the driver is
3764 * down there is nothing to do so return handled
3766 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3769 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3770 hw->get_link_status = 1;
3771 /* guard against interrupt when we're going down */
3772 if (!test_bit(__E1000_DOWN, &adapter->flags))
3773 schedule_delayed_work(&adapter->watchdog_task, 1);
3776 /* disable interrupts, without the synchronize_irq bit */
3778 E1000_WRITE_FLUSH();
3780 if (likely(napi_schedule_prep(&adapter->napi))) {
3781 adapter->total_tx_bytes = 0;
3782 adapter->total_tx_packets = 0;
3783 adapter->total_rx_bytes = 0;
3784 adapter->total_rx_packets = 0;
3785 __napi_schedule(&adapter->napi);
3787 /* this really should not happen! if it does it is basically a
3788 * bug, but not a hard error, so enable ints and continue
3790 if (!test_bit(__E1000_DOWN, &adapter->flags))
3791 e1000_irq_enable(adapter);
3798 * e1000_clean - NAPI Rx polling callback
3799 * @adapter: board private structure
3801 static int e1000_clean(struct napi_struct *napi, int budget)
3803 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
3805 int tx_clean_complete = 0, work_done = 0;
3807 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3809 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3811 if (!tx_clean_complete)
3814 /* If budget not fully consumed, exit the polling mode */
3815 if (work_done < budget) {
3816 if (likely(adapter->itr_setting & 3))
3817 e1000_set_itr(adapter);
3818 napi_complete(napi);
3819 if (!test_bit(__E1000_DOWN, &adapter->flags))
3820 e1000_irq_enable(adapter);
3827 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3828 * @adapter: board private structure
3830 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3831 struct e1000_tx_ring *tx_ring)
3833 struct e1000_hw *hw = &adapter->hw;
3834 struct net_device *netdev = adapter->netdev;
3835 struct e1000_tx_desc *tx_desc, *eop_desc;
3836 struct e1000_buffer *buffer_info;
3837 unsigned int i, eop;
3838 unsigned int count = 0;
3839 unsigned int total_tx_bytes=0, total_tx_packets=0;
3840 unsigned int bytes_compl = 0, pkts_compl = 0;
3842 i = tx_ring->next_to_clean;
3843 eop = tx_ring->buffer_info[i].next_to_watch;
3844 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3846 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3847 (count < tx_ring->count)) {
3848 bool cleaned = false;
3849 rmb(); /* read buffer_info after eop_desc */
3850 for ( ; !cleaned; count++) {
3851 tx_desc = E1000_TX_DESC(*tx_ring, i);
3852 buffer_info = &tx_ring->buffer_info[i];
3853 cleaned = (i == eop);
3856 total_tx_packets += buffer_info->segs;
3857 total_tx_bytes += buffer_info->bytecount;
3858 if (buffer_info->skb) {
3859 bytes_compl += buffer_info->skb->len;
3864 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3865 tx_desc->upper.data = 0;
3867 if (unlikely(++i == tx_ring->count)) i = 0;
3870 eop = tx_ring->buffer_info[i].next_to_watch;
3871 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3874 tx_ring->next_to_clean = i;
3876 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
3878 #define TX_WAKE_THRESHOLD 32
3879 if (unlikely(count && netif_carrier_ok(netdev) &&
3880 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3881 /* Make sure that anybody stopping the queue after this
3882 * sees the new next_to_clean.
3886 if (netif_queue_stopped(netdev) &&
3887 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3888 netif_wake_queue(netdev);
3889 ++adapter->restart_queue;
3893 if (adapter->detect_tx_hung) {
3894 /* Detect a transmit hang in hardware, this serializes the
3895 * check with the clearing of time_stamp and movement of i
3897 adapter->detect_tx_hung = false;
3898 if (tx_ring->buffer_info[eop].time_stamp &&
3899 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3900 (adapter->tx_timeout_factor * HZ)) &&
3901 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3903 /* detected Tx unit hang */
3904 e_err(drv, "Detected Tx Unit Hang\n"
3908 " next_to_use <%x>\n"
3909 " next_to_clean <%x>\n"
3910 "buffer_info[next_to_clean]\n"
3911 " time_stamp <%lx>\n"
3912 " next_to_watch <%x>\n"
3914 " next_to_watch.status <%x>\n",
3915 (unsigned long)(tx_ring - adapter->tx_ring),
3916 readl(hw->hw_addr + tx_ring->tdh),
3917 readl(hw->hw_addr + tx_ring->tdt),
3918 tx_ring->next_to_use,
3919 tx_ring->next_to_clean,
3920 tx_ring->buffer_info[eop].time_stamp,
3923 eop_desc->upper.fields.status);
3924 e1000_dump(adapter);
3925 netif_stop_queue(netdev);
3928 adapter->total_tx_bytes += total_tx_bytes;
3929 adapter->total_tx_packets += total_tx_packets;
3930 netdev->stats.tx_bytes += total_tx_bytes;
3931 netdev->stats.tx_packets += total_tx_packets;
3932 return count < tx_ring->count;
3936 * e1000_rx_checksum - Receive Checksum Offload for 82543
3937 * @adapter: board private structure
3938 * @status_err: receive descriptor status and error fields
3939 * @csum: receive descriptor csum field
3940 * @sk_buff: socket buffer with received data
3942 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3943 u32 csum, struct sk_buff *skb)
3945 struct e1000_hw *hw = &adapter->hw;
3946 u16 status = (u16)status_err;
3947 u8 errors = (u8)(status_err >> 24);
3949 skb_checksum_none_assert(skb);
3951 /* 82543 or newer only */
3952 if (unlikely(hw->mac_type < e1000_82543)) return;
3953 /* Ignore Checksum bit is set */
3954 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3955 /* TCP/UDP checksum error bit is set */
3956 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3957 /* let the stack verify checksum errors */
3958 adapter->hw_csum_err++;
3961 /* TCP/UDP Checksum has not been calculated */
3962 if (!(status & E1000_RXD_STAT_TCPCS))
3965 /* It must be a TCP or UDP packet with a valid checksum */
3966 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3967 /* TCP checksum is good */
3968 skb->ip_summed = CHECKSUM_UNNECESSARY;
3970 adapter->hw_csum_good++;
3974 * e1000_consume_page - helper function
3976 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3981 skb->data_len += length;
3982 skb->truesize += PAGE_SIZE;
3986 * e1000_receive_skb - helper function to handle rx indications
3987 * @adapter: board private structure
3988 * @status: descriptor status field as written by hardware
3989 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3990 * @skb: pointer to sk_buff to be indicated to stack
3992 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3993 __le16 vlan, struct sk_buff *skb)
3995 skb->protocol = eth_type_trans(skb, adapter->netdev);
3997 if (status & E1000_RXD_STAT_VP) {
3998 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4000 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4002 napi_gro_receive(&adapter->napi, skb);
4006 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4007 * @adapter: board private structure
4008 * @rx_ring: ring to clean
4009 * @work_done: amount of napi work completed this call
4010 * @work_to_do: max amount of work allowed for this call to do
4012 * the return value indicates whether actual cleaning was done, there
4013 * is no guarantee that everything was cleaned
4015 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
4016 struct e1000_rx_ring *rx_ring,
4017 int *work_done, int work_to_do)
4019 struct e1000_hw *hw = &adapter->hw;
4020 struct net_device *netdev = adapter->netdev;
4021 struct pci_dev *pdev = adapter->pdev;
4022 struct e1000_rx_desc *rx_desc, *next_rxd;
4023 struct e1000_buffer *buffer_info, *next_buffer;
4024 unsigned long irq_flags;
4027 int cleaned_count = 0;
4028 bool cleaned = false;
4029 unsigned int total_rx_bytes=0, total_rx_packets=0;
4031 i = rx_ring->next_to_clean;
4032 rx_desc = E1000_RX_DESC(*rx_ring, i);
4033 buffer_info = &rx_ring->buffer_info[i];
4035 while (rx_desc->status & E1000_RXD_STAT_DD) {
4036 struct sk_buff *skb;
4039 if (*work_done >= work_to_do)
4042 rmb(); /* read descriptor and rx_buffer_info after status DD */
4044 status = rx_desc->status;
4045 skb = buffer_info->skb;
4046 buffer_info->skb = NULL;
4048 if (++i == rx_ring->count) i = 0;
4049 next_rxd = E1000_RX_DESC(*rx_ring, i);
4052 next_buffer = &rx_ring->buffer_info[i];
4056 dma_unmap_page(&pdev->dev, buffer_info->dma,
4057 buffer_info->length, DMA_FROM_DEVICE);
4058 buffer_info->dma = 0;
4060 length = le16_to_cpu(rx_desc->length);
4062 /* errors is only valid for DD + EOP descriptors */
4063 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4064 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4068 mapped = page_address(buffer_info->page);
4069 last_byte = *(mapped + length - 1);
4070 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4072 spin_lock_irqsave(&adapter->stats_lock,
4074 e1000_tbi_adjust_stats(hw, &adapter->stats,
4076 spin_unlock_irqrestore(&adapter->stats_lock,
4080 if (netdev->features & NETIF_F_RXALL)
4082 /* recycle both page and skb */
4083 buffer_info->skb = skb;
4084 /* an error means any chain goes out the window
4087 if (rx_ring->rx_skb_top)
4088 dev_kfree_skb(rx_ring->rx_skb_top);
4089 rx_ring->rx_skb_top = NULL;
4094 #define rxtop rx_ring->rx_skb_top
4096 if (!(status & E1000_RXD_STAT_EOP)) {
4097 /* this descriptor is only the beginning (or middle) */
4099 /* this is the beginning of a chain */
4101 skb_fill_page_desc(rxtop, 0, buffer_info->page,
4104 /* this is the middle of a chain */
4105 skb_fill_page_desc(rxtop,
4106 skb_shinfo(rxtop)->nr_frags,
4107 buffer_info->page, 0, length);
4108 /* re-use the skb, only consumed the page */
4109 buffer_info->skb = skb;
4111 e1000_consume_page(buffer_info, rxtop, length);
4115 /* end of the chain */
4116 skb_fill_page_desc(rxtop,
4117 skb_shinfo(rxtop)->nr_frags,
4118 buffer_info->page, 0, length);
4119 /* re-use the current skb, we only consumed the
4122 buffer_info->skb = skb;
4125 e1000_consume_page(buffer_info, skb, length);
4127 /* no chain, got EOP, this buf is the packet
4128 * copybreak to save the put_page/alloc_page
4130 if (length <= copybreak &&
4131 skb_tailroom(skb) >= length) {
4133 vaddr = kmap_atomic(buffer_info->page);
4134 memcpy(skb_tail_pointer(skb), vaddr,
4136 kunmap_atomic(vaddr);
4137 /* re-use the page, so don't erase
4140 skb_put(skb, length);
4142 skb_fill_page_desc(skb, 0,
4143 buffer_info->page, 0,
4145 e1000_consume_page(buffer_info, skb,
4151 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4152 e1000_rx_checksum(adapter,
4154 ((u32)(rx_desc->errors) << 24),
4155 le16_to_cpu(rx_desc->csum), skb);
4157 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4158 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4159 pskb_trim(skb, skb->len - 4);
4162 /* eth type trans needs skb->data to point to something */
4163 if (!pskb_may_pull(skb, ETH_HLEN)) {
4164 e_err(drv, "pskb_may_pull failed.\n");
4169 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4172 rx_desc->status = 0;
4174 /* return some buffers to hardware, one at a time is too slow */
4175 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4176 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4180 /* use prefetched values */
4182 buffer_info = next_buffer;
4184 rx_ring->next_to_clean = i;
4186 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4188 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4190 adapter->total_rx_packets += total_rx_packets;
4191 adapter->total_rx_bytes += total_rx_bytes;
4192 netdev->stats.rx_bytes += total_rx_bytes;
4193 netdev->stats.rx_packets += total_rx_packets;
4197 /* this should improve performance for small packets with large amounts
4198 * of reassembly being done in the stack
4200 static void e1000_check_copybreak(struct net_device *netdev,
4201 struct e1000_buffer *buffer_info,
4202 u32 length, struct sk_buff **skb)
4204 struct sk_buff *new_skb;
4206 if (length > copybreak)
4209 new_skb = netdev_alloc_skb_ip_align(netdev, length);
4213 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
4214 (*skb)->data - NET_IP_ALIGN,
4215 length + NET_IP_ALIGN);
4216 /* save the skb in buffer_info as good */
4217 buffer_info->skb = *skb;
4222 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4223 * @adapter: board private structure
4224 * @rx_ring: ring to clean
4225 * @work_done: amount of napi work completed this call
4226 * @work_to_do: max amount of work allowed for this call to do
4228 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4229 struct e1000_rx_ring *rx_ring,
4230 int *work_done, int work_to_do)
4232 struct e1000_hw *hw = &adapter->hw;
4233 struct net_device *netdev = adapter->netdev;
4234 struct pci_dev *pdev = adapter->pdev;
4235 struct e1000_rx_desc *rx_desc, *next_rxd;
4236 struct e1000_buffer *buffer_info, *next_buffer;
4237 unsigned long flags;
4240 int cleaned_count = 0;
4241 bool cleaned = false;
4242 unsigned int total_rx_bytes=0, total_rx_packets=0;
4244 i = rx_ring->next_to_clean;
4245 rx_desc = E1000_RX_DESC(*rx_ring, i);
4246 buffer_info = &rx_ring->buffer_info[i];
4248 while (rx_desc->status & E1000_RXD_STAT_DD) {
4249 struct sk_buff *skb;
4252 if (*work_done >= work_to_do)
4255 rmb(); /* read descriptor and rx_buffer_info after status DD */
4257 status = rx_desc->status;
4258 skb = buffer_info->skb;
4259 buffer_info->skb = NULL;
4261 prefetch(skb->data - NET_IP_ALIGN);
4263 if (++i == rx_ring->count) i = 0;
4264 next_rxd = E1000_RX_DESC(*rx_ring, i);
4267 next_buffer = &rx_ring->buffer_info[i];
4271 dma_unmap_single(&pdev->dev, buffer_info->dma,
4272 buffer_info->length, DMA_FROM_DEVICE);
4273 buffer_info->dma = 0;
4275 length = le16_to_cpu(rx_desc->length);
4276 /* !EOP means multiple descriptors were used to store a single
4277 * packet, if thats the case we need to toss it. In fact, we
4278 * to toss every packet with the EOP bit clear and the next
4279 * frame that _does_ have the EOP bit set, as it is by
4280 * definition only a frame fragment
4282 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4283 adapter->discarding = true;
4285 if (adapter->discarding) {
4286 /* All receives must fit into a single buffer */
4287 e_dbg("Receive packet consumed multiple buffers\n");
4289 buffer_info->skb = skb;
4290 if (status & E1000_RXD_STAT_EOP)
4291 adapter->discarding = false;
4295 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4296 u8 last_byte = *(skb->data + length - 1);
4297 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4299 spin_lock_irqsave(&adapter->stats_lock, flags);
4300 e1000_tbi_adjust_stats(hw, &adapter->stats,
4302 spin_unlock_irqrestore(&adapter->stats_lock,
4306 if (netdev->features & NETIF_F_RXALL)
4309 buffer_info->skb = skb;
4315 total_rx_bytes += (length - 4); /* don't count FCS */
4318 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4319 /* adjust length to remove Ethernet CRC, this must be
4320 * done after the TBI_ACCEPT workaround above
4324 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4326 skb_put(skb, length);
4328 /* Receive Checksum Offload */
4329 e1000_rx_checksum(adapter,
4331 ((u32)(rx_desc->errors) << 24),
4332 le16_to_cpu(rx_desc->csum), skb);
4334 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4337 rx_desc->status = 0;
4339 /* return some buffers to hardware, one at a time is too slow */
4340 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4341 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4345 /* use prefetched values */
4347 buffer_info = next_buffer;
4349 rx_ring->next_to_clean = i;
4351 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4353 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4355 adapter->total_rx_packets += total_rx_packets;
4356 adapter->total_rx_bytes += total_rx_bytes;
4357 netdev->stats.rx_bytes += total_rx_bytes;
4358 netdev->stats.rx_packets += total_rx_packets;
4363 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4364 * @adapter: address of board private structure
4365 * @rx_ring: pointer to receive ring structure
4366 * @cleaned_count: number of buffers to allocate this pass
4369 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4370 struct e1000_rx_ring *rx_ring, int cleaned_count)
4372 struct net_device *netdev = adapter->netdev;
4373 struct pci_dev *pdev = adapter->pdev;
4374 struct e1000_rx_desc *rx_desc;
4375 struct e1000_buffer *buffer_info;
4376 struct sk_buff *skb;
4378 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4380 i = rx_ring->next_to_use;
4381 buffer_info = &rx_ring->buffer_info[i];
4383 while (cleaned_count--) {
4384 skb = buffer_info->skb;
4390 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4391 if (unlikely(!skb)) {
4392 /* Better luck next round */
4393 adapter->alloc_rx_buff_failed++;
4397 buffer_info->skb = skb;
4398 buffer_info->length = adapter->rx_buffer_len;
4400 /* allocate a new page if necessary */
4401 if (!buffer_info->page) {
4402 buffer_info->page = alloc_page(GFP_ATOMIC);
4403 if (unlikely(!buffer_info->page)) {
4404 adapter->alloc_rx_buff_failed++;
4409 if (!buffer_info->dma) {
4410 buffer_info->dma = dma_map_page(&pdev->dev,
4411 buffer_info->page, 0,
4412 buffer_info->length,
4414 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4415 put_page(buffer_info->page);
4417 buffer_info->page = NULL;
4418 buffer_info->skb = NULL;
4419 buffer_info->dma = 0;
4420 adapter->alloc_rx_buff_failed++;
4421 break; /* while !buffer_info->skb */
4425 rx_desc = E1000_RX_DESC(*rx_ring, i);
4426 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4428 if (unlikely(++i == rx_ring->count))
4430 buffer_info = &rx_ring->buffer_info[i];
4433 if (likely(rx_ring->next_to_use != i)) {
4434 rx_ring->next_to_use = i;
4435 if (unlikely(i-- == 0))
4436 i = (rx_ring->count - 1);
4438 /* Force memory writes to complete before letting h/w
4439 * know there are new descriptors to fetch. (Only
4440 * applicable for weak-ordered memory model archs,
4444 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4449 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4450 * @adapter: address of board private structure
4452 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4453 struct e1000_rx_ring *rx_ring,
4456 struct e1000_hw *hw = &adapter->hw;
4457 struct net_device *netdev = adapter->netdev;
4458 struct pci_dev *pdev = adapter->pdev;
4459 struct e1000_rx_desc *rx_desc;
4460 struct e1000_buffer *buffer_info;
4461 struct sk_buff *skb;
4463 unsigned int bufsz = adapter->rx_buffer_len;
4465 i = rx_ring->next_to_use;
4466 buffer_info = &rx_ring->buffer_info[i];
4468 while (cleaned_count--) {
4469 skb = buffer_info->skb;
4475 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4476 if (unlikely(!skb)) {
4477 /* Better luck next round */
4478 adapter->alloc_rx_buff_failed++;
4482 /* Fix for errata 23, can't cross 64kB boundary */
4483 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4484 struct sk_buff *oldskb = skb;
4485 e_err(rx_err, "skb align check failed: %u bytes at "
4486 "%p\n", bufsz, skb->data);
4487 /* Try again, without freeing the previous */
4488 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4489 /* Failed allocation, critical failure */
4491 dev_kfree_skb(oldskb);
4492 adapter->alloc_rx_buff_failed++;
4496 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4499 dev_kfree_skb(oldskb);
4500 adapter->alloc_rx_buff_failed++;
4501 break; /* while !buffer_info->skb */
4504 /* Use new allocation */
4505 dev_kfree_skb(oldskb);
4507 buffer_info->skb = skb;
4508 buffer_info->length = adapter->rx_buffer_len;
4510 buffer_info->dma = dma_map_single(&pdev->dev,
4512 buffer_info->length,
4514 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4516 buffer_info->skb = NULL;
4517 buffer_info->dma = 0;
4518 adapter->alloc_rx_buff_failed++;
4519 break; /* while !buffer_info->skb */
4522 /* XXX if it was allocated cleanly it will never map to a
4526 /* Fix for errata 23, can't cross 64kB boundary */
4527 if (!e1000_check_64k_bound(adapter,
4528 (void *)(unsigned long)buffer_info->dma,
4529 adapter->rx_buffer_len)) {
4530 e_err(rx_err, "dma align check failed: %u bytes at "
4531 "%p\n", adapter->rx_buffer_len,
4532 (void *)(unsigned long)buffer_info->dma);
4534 buffer_info->skb = NULL;
4536 dma_unmap_single(&pdev->dev, buffer_info->dma,
4537 adapter->rx_buffer_len,
4539 buffer_info->dma = 0;
4541 adapter->alloc_rx_buff_failed++;
4542 break; /* while !buffer_info->skb */
4544 rx_desc = E1000_RX_DESC(*rx_ring, i);
4545 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4547 if (unlikely(++i == rx_ring->count))
4549 buffer_info = &rx_ring->buffer_info[i];
4552 if (likely(rx_ring->next_to_use != i)) {
4553 rx_ring->next_to_use = i;
4554 if (unlikely(i-- == 0))
4555 i = (rx_ring->count - 1);
4557 /* Force memory writes to complete before letting h/w
4558 * know there are new descriptors to fetch. (Only
4559 * applicable for weak-ordered memory model archs,
4563 writel(i, hw->hw_addr + rx_ring->rdt);
4568 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4571 static void e1000_smartspeed(struct e1000_adapter *adapter)
4573 struct e1000_hw *hw = &adapter->hw;
4577 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4578 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4581 if (adapter->smartspeed == 0) {
4582 /* If Master/Slave config fault is asserted twice,
4583 * we assume back-to-back
4585 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4586 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4587 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4588 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4589 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4590 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4591 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4592 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4594 adapter->smartspeed++;
4595 if (!e1000_phy_setup_autoneg(hw) &&
4596 !e1000_read_phy_reg(hw, PHY_CTRL,
4598 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4599 MII_CR_RESTART_AUTO_NEG);
4600 e1000_write_phy_reg(hw, PHY_CTRL,
4605 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4606 /* If still no link, perhaps using 2/3 pair cable */
4607 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4608 phy_ctrl |= CR_1000T_MS_ENABLE;
4609 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4610 if (!e1000_phy_setup_autoneg(hw) &&
4611 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4612 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4613 MII_CR_RESTART_AUTO_NEG);
4614 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4617 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4618 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4619 adapter->smartspeed = 0;
4628 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4634 return e1000_mii_ioctl(netdev, ifr, cmd);
4646 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4649 struct e1000_adapter *adapter = netdev_priv(netdev);
4650 struct e1000_hw *hw = &adapter->hw;
4651 struct mii_ioctl_data *data = if_mii(ifr);
4654 unsigned long flags;
4656 if (hw->media_type != e1000_media_type_copper)
4661 data->phy_id = hw->phy_addr;
4664 spin_lock_irqsave(&adapter->stats_lock, flags);
4665 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4667 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4670 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4673 if (data->reg_num & ~(0x1F))
4675 mii_reg = data->val_in;
4676 spin_lock_irqsave(&adapter->stats_lock, flags);
4677 if (e1000_write_phy_reg(hw, data->reg_num,
4679 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4682 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4683 if (hw->media_type == e1000_media_type_copper) {
4684 switch (data->reg_num) {
4686 if (mii_reg & MII_CR_POWER_DOWN)
4688 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4690 hw->autoneg_advertised = 0x2F;
4695 else if (mii_reg & 0x2000)
4699 retval = e1000_set_spd_dplx(
4707 if (netif_running(adapter->netdev))
4708 e1000_reinit_locked(adapter);
4710 e1000_reset(adapter);
4712 case M88E1000_PHY_SPEC_CTRL:
4713 case M88E1000_EXT_PHY_SPEC_CTRL:
4714 if (e1000_phy_reset(hw))
4719 switch (data->reg_num) {
4721 if (mii_reg & MII_CR_POWER_DOWN)
4723 if (netif_running(adapter->netdev))
4724 e1000_reinit_locked(adapter);
4726 e1000_reset(adapter);
4734 return E1000_SUCCESS;
4737 void e1000_pci_set_mwi(struct e1000_hw *hw)
4739 struct e1000_adapter *adapter = hw->back;
4740 int ret_val = pci_set_mwi(adapter->pdev);
4743 e_err(probe, "Error in setting MWI\n");
4746 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4748 struct e1000_adapter *adapter = hw->back;
4750 pci_clear_mwi(adapter->pdev);
4753 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4755 struct e1000_adapter *adapter = hw->back;
4756 return pcix_get_mmrbc(adapter->pdev);
4759 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4761 struct e1000_adapter *adapter = hw->back;
4762 pcix_set_mmrbc(adapter->pdev, mmrbc);
4765 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4770 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4774 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4779 static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4780 netdev_features_t features)
4782 struct e1000_hw *hw = &adapter->hw;
4786 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
4787 /* enable VLAN tag insert/strip */
4788 ctrl |= E1000_CTRL_VME;
4790 /* disable VLAN tag insert/strip */
4791 ctrl &= ~E1000_CTRL_VME;
4795 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4798 struct e1000_hw *hw = &adapter->hw;
4801 if (!test_bit(__E1000_DOWN, &adapter->flags))
4802 e1000_irq_disable(adapter);
4804 __e1000_vlan_mode(adapter, adapter->netdev->features);
4806 /* enable VLAN receive filtering */
4808 rctl &= ~E1000_RCTL_CFIEN;
4809 if (!(adapter->netdev->flags & IFF_PROMISC))
4810 rctl |= E1000_RCTL_VFE;
4812 e1000_update_mng_vlan(adapter);
4814 /* disable VLAN receive filtering */
4816 rctl &= ~E1000_RCTL_VFE;
4820 if (!test_bit(__E1000_DOWN, &adapter->flags))
4821 e1000_irq_enable(adapter);
4824 static void e1000_vlan_mode(struct net_device *netdev,
4825 netdev_features_t features)
4827 struct e1000_adapter *adapter = netdev_priv(netdev);
4829 if (!test_bit(__E1000_DOWN, &adapter->flags))
4830 e1000_irq_disable(adapter);
4832 __e1000_vlan_mode(adapter, features);
4834 if (!test_bit(__E1000_DOWN, &adapter->flags))
4835 e1000_irq_enable(adapter);
4838 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
4839 __be16 proto, u16 vid)
4841 struct e1000_adapter *adapter = netdev_priv(netdev);
4842 struct e1000_hw *hw = &adapter->hw;
4845 if ((hw->mng_cookie.status &
4846 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4847 (vid == adapter->mng_vlan_id))
4850 if (!e1000_vlan_used(adapter))
4851 e1000_vlan_filter_on_off(adapter, true);
4853 /* add VID to filter table */
4854 index = (vid >> 5) & 0x7F;
4855 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4856 vfta |= (1 << (vid & 0x1F));
4857 e1000_write_vfta(hw, index, vfta);
4859 set_bit(vid, adapter->active_vlans);
4864 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
4865 __be16 proto, u16 vid)
4867 struct e1000_adapter *adapter = netdev_priv(netdev);
4868 struct e1000_hw *hw = &adapter->hw;
4871 if (!test_bit(__E1000_DOWN, &adapter->flags))
4872 e1000_irq_disable(adapter);
4873 if (!test_bit(__E1000_DOWN, &adapter->flags))
4874 e1000_irq_enable(adapter);
4876 /* remove VID from filter table */
4877 index = (vid >> 5) & 0x7F;
4878 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4879 vfta &= ~(1 << (vid & 0x1F));
4880 e1000_write_vfta(hw, index, vfta);
4882 clear_bit(vid, adapter->active_vlans);
4884 if (!e1000_vlan_used(adapter))
4885 e1000_vlan_filter_on_off(adapter, false);
4890 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4894 if (!e1000_vlan_used(adapter))
4897 e1000_vlan_filter_on_off(adapter, true);
4898 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4899 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
4902 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4904 struct e1000_hw *hw = &adapter->hw;
4908 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4909 * for the switch() below to work
4911 if ((spd & 1) || (dplx & ~1))
4914 /* Fiber NICs only allow 1000 gbps Full duplex */
4915 if ((hw->media_type == e1000_media_type_fiber) &&
4916 spd != SPEED_1000 &&
4917 dplx != DUPLEX_FULL)
4920 switch (spd + dplx) {
4921 case SPEED_10 + DUPLEX_HALF:
4922 hw->forced_speed_duplex = e1000_10_half;
4924 case SPEED_10 + DUPLEX_FULL:
4925 hw->forced_speed_duplex = e1000_10_full;
4927 case SPEED_100 + DUPLEX_HALF:
4928 hw->forced_speed_duplex = e1000_100_half;
4930 case SPEED_100 + DUPLEX_FULL:
4931 hw->forced_speed_duplex = e1000_100_full;
4933 case SPEED_1000 + DUPLEX_FULL:
4935 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4937 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4942 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
4943 hw->mdix = AUTO_ALL_MODES;
4948 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4952 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4954 struct net_device *netdev = pci_get_drvdata(pdev);
4955 struct e1000_adapter *adapter = netdev_priv(netdev);
4956 struct e1000_hw *hw = &adapter->hw;
4957 u32 ctrl, ctrl_ext, rctl, status;
4958 u32 wufc = adapter->wol;
4963 netif_device_detach(netdev);
4965 if (netif_running(netdev)) {
4966 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4967 e1000_down(adapter);
4971 retval = pci_save_state(pdev);
4976 status = er32(STATUS);
4977 if (status & E1000_STATUS_LU)
4978 wufc &= ~E1000_WUFC_LNKC;
4981 e1000_setup_rctl(adapter);
4982 e1000_set_rx_mode(netdev);
4986 /* turn on all-multi mode if wake on multicast is enabled */
4987 if (wufc & E1000_WUFC_MC)
4988 rctl |= E1000_RCTL_MPE;
4990 /* enable receives in the hardware */
4991 ew32(RCTL, rctl | E1000_RCTL_EN);
4993 if (hw->mac_type >= e1000_82540) {
4995 /* advertise wake from D3Cold */
4996 #define E1000_CTRL_ADVD3WUC 0x00100000
4997 /* phy power management enable */
4998 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4999 ctrl |= E1000_CTRL_ADVD3WUC |
5000 E1000_CTRL_EN_PHY_PWR_MGMT;
5004 if (hw->media_type == e1000_media_type_fiber ||
5005 hw->media_type == e1000_media_type_internal_serdes) {
5006 /* keep the laser running in D3 */
5007 ctrl_ext = er32(CTRL_EXT);
5008 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5009 ew32(CTRL_EXT, ctrl_ext);
5012 ew32(WUC, E1000_WUC_PME_EN);
5019 e1000_release_manageability(adapter);
5021 *enable_wake = !!wufc;
5023 /* make sure adapter isn't asleep if manageability is enabled */
5024 if (adapter->en_mng_pt)
5025 *enable_wake = true;
5027 if (netif_running(netdev))
5028 e1000_free_irq(adapter);
5030 pci_disable_device(pdev);
5036 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5041 retval = __e1000_shutdown(pdev, &wake);
5046 pci_prepare_to_sleep(pdev);
5048 pci_wake_from_d3(pdev, false);
5049 pci_set_power_state(pdev, PCI_D3hot);
5055 static int e1000_resume(struct pci_dev *pdev)
5057 struct net_device *netdev = pci_get_drvdata(pdev);
5058 struct e1000_adapter *adapter = netdev_priv(netdev);
5059 struct e1000_hw *hw = &adapter->hw;
5062 pci_set_power_state(pdev, PCI_D0);
5063 pci_restore_state(pdev);
5064 pci_save_state(pdev);
5066 if (adapter->need_ioport)
5067 err = pci_enable_device(pdev);
5069 err = pci_enable_device_mem(pdev);
5071 pr_err("Cannot enable PCI device from suspend\n");
5074 pci_set_master(pdev);
5076 pci_enable_wake(pdev, PCI_D3hot, 0);
5077 pci_enable_wake(pdev, PCI_D3cold, 0);
5079 if (netif_running(netdev)) {
5080 err = e1000_request_irq(adapter);
5085 e1000_power_up_phy(adapter);
5086 e1000_reset(adapter);
5089 e1000_init_manageability(adapter);
5091 if (netif_running(netdev))
5094 netif_device_attach(netdev);
5100 static void e1000_shutdown(struct pci_dev *pdev)
5104 __e1000_shutdown(pdev, &wake);
5106 if (system_state == SYSTEM_POWER_OFF) {
5107 pci_wake_from_d3(pdev, wake);
5108 pci_set_power_state(pdev, PCI_D3hot);
5112 #ifdef CONFIG_NET_POLL_CONTROLLER
5113 /* Polling 'interrupt' - used by things like netconsole to send skbs
5114 * without having to re-enable interrupts. It's not called while
5115 * the interrupt routine is executing.
5117 static void e1000_netpoll(struct net_device *netdev)
5119 struct e1000_adapter *adapter = netdev_priv(netdev);
5121 disable_irq(adapter->pdev->irq);
5122 e1000_intr(adapter->pdev->irq, netdev);
5123 enable_irq(adapter->pdev->irq);
5128 * e1000_io_error_detected - called when PCI error is detected
5129 * @pdev: Pointer to PCI device
5130 * @state: The current pci connection state
5132 * This function is called after a PCI bus error affecting
5133 * this device has been detected.
5135 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5136 pci_channel_state_t state)
5138 struct net_device *netdev = pci_get_drvdata(pdev);
5139 struct e1000_adapter *adapter = netdev_priv(netdev);
5141 netif_device_detach(netdev);
5143 if (state == pci_channel_io_perm_failure)
5144 return PCI_ERS_RESULT_DISCONNECT;
5146 if (netif_running(netdev))
5147 e1000_down(adapter);
5148 pci_disable_device(pdev);
5150 /* Request a slot slot reset. */
5151 return PCI_ERS_RESULT_NEED_RESET;
5155 * e1000_io_slot_reset - called after the pci bus has been reset.
5156 * @pdev: Pointer to PCI device
5158 * Restart the card from scratch, as if from a cold-boot. Implementation
5159 * resembles the first-half of the e1000_resume routine.
5161 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5163 struct net_device *netdev = pci_get_drvdata(pdev);
5164 struct e1000_adapter *adapter = netdev_priv(netdev);
5165 struct e1000_hw *hw = &adapter->hw;
5168 if (adapter->need_ioport)
5169 err = pci_enable_device(pdev);
5171 err = pci_enable_device_mem(pdev);
5173 pr_err("Cannot re-enable PCI device after reset.\n");
5174 return PCI_ERS_RESULT_DISCONNECT;
5176 pci_set_master(pdev);
5178 pci_enable_wake(pdev, PCI_D3hot, 0);
5179 pci_enable_wake(pdev, PCI_D3cold, 0);
5181 e1000_reset(adapter);
5184 return PCI_ERS_RESULT_RECOVERED;
5188 * e1000_io_resume - called when traffic can start flowing again.
5189 * @pdev: Pointer to PCI device
5191 * This callback is called when the error recovery driver tells us that
5192 * its OK to resume normal operation. Implementation resembles the
5193 * second-half of the e1000_resume routine.
5195 static void e1000_io_resume(struct pci_dev *pdev)
5197 struct net_device *netdev = pci_get_drvdata(pdev);
5198 struct e1000_adapter *adapter = netdev_priv(netdev);
5200 e1000_init_manageability(adapter);
5202 if (netif_running(netdev)) {
5203 if (e1000_up(adapter)) {
5204 pr_info("can't bring device back up after reset\n");
5209 netif_device_attach(netdev);