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 __devexit 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, u16 vid);
170 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
171 static void e1000_restore_vlan(struct e1000_adapter *adapter);
174 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
175 static int e1000_resume(struct pci_dev *pdev);
177 static void e1000_shutdown(struct pci_dev *pdev);
179 #ifdef CONFIG_NET_POLL_CONTROLLER
180 /* for netdump / net console */
181 static void e1000_netpoll (struct net_device *netdev);
184 #define COPYBREAK_DEFAULT 256
185 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
186 module_param(copybreak, uint, 0644);
187 MODULE_PARM_DESC(copybreak,
188 "Maximum size of packet that is copied to a new buffer on receive");
190 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
191 pci_channel_state_t state);
192 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
193 static void e1000_io_resume(struct pci_dev *pdev);
195 static struct pci_error_handlers e1000_err_handler = {
196 .error_detected = e1000_io_error_detected,
197 .slot_reset = e1000_io_slot_reset,
198 .resume = e1000_io_resume,
201 static struct pci_driver e1000_driver = {
202 .name = e1000_driver_name,
203 .id_table = e1000_pci_tbl,
204 .probe = e1000_probe,
205 .remove = __devexit_p(e1000_remove),
207 /* Power Management Hooks */
208 .suspend = e1000_suspend,
209 .resume = e1000_resume,
211 .shutdown = e1000_shutdown,
212 .err_handler = &e1000_err_handler
215 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
216 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
217 MODULE_LICENSE("GPL");
218 MODULE_VERSION(DRV_VERSION);
220 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
221 static int debug = -1;
222 module_param(debug, int, 0);
223 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
226 * e1000_get_hw_dev - return device
227 * used by hardware layer to print debugging information
230 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
232 struct e1000_adapter *adapter = hw->back;
233 return adapter->netdev;
237 * e1000_init_module - Driver Registration Routine
239 * e1000_init_module is the first routine called when the driver is
240 * loaded. All it does is register with the PCI subsystem.
243 static int __init e1000_init_module(void)
246 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
248 pr_info("%s\n", e1000_copyright);
250 ret = pci_register_driver(&e1000_driver);
251 if (copybreak != COPYBREAK_DEFAULT) {
253 pr_info("copybreak disabled\n");
255 pr_info("copybreak enabled for "
256 "packets <= %u bytes\n", copybreak);
261 module_init(e1000_init_module);
264 * e1000_exit_module - Driver Exit Cleanup Routine
266 * 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
305 static void e1000_irq_disable(struct e1000_adapter *adapter)
307 struct e1000_hw *hw = &adapter->hw;
311 synchronize_irq(adapter->pdev->irq);
315 * e1000_irq_enable - Enable default interrupt generation settings
316 * @adapter: board private structure
319 static void e1000_irq_enable(struct e1000_adapter *adapter)
321 struct e1000_hw *hw = &adapter->hw;
323 ew32(IMS, IMS_ENABLE_MASK);
327 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
329 struct e1000_hw *hw = &adapter->hw;
330 struct net_device *netdev = adapter->netdev;
331 u16 vid = hw->mng_cookie.vlan_id;
332 u16 old_vid = adapter->mng_vlan_id;
334 if (!e1000_vlan_used(adapter))
337 if (!test_bit(vid, adapter->active_vlans)) {
338 if (hw->mng_cookie.status &
339 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
340 e1000_vlan_rx_add_vid(netdev, vid);
341 adapter->mng_vlan_id = vid;
343 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
345 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
347 !test_bit(old_vid, adapter->active_vlans))
348 e1000_vlan_rx_kill_vid(netdev, old_vid);
350 adapter->mng_vlan_id = vid;
354 static void e1000_init_manageability(struct e1000_adapter *adapter)
356 struct e1000_hw *hw = &adapter->hw;
358 if (adapter->en_mng_pt) {
359 u32 manc = er32(MANC);
361 /* disable hardware interception of ARP */
362 manc &= ~(E1000_MANC_ARP_EN);
368 static void e1000_release_manageability(struct e1000_adapter *adapter)
370 struct e1000_hw *hw = &adapter->hw;
372 if (adapter->en_mng_pt) {
373 u32 manc = er32(MANC);
375 /* re-enable hardware interception of ARP */
376 manc |= E1000_MANC_ARP_EN;
383 * e1000_configure - configure the hardware for RX and TX
384 * @adapter = private board structure
386 static void e1000_configure(struct e1000_adapter *adapter)
388 struct net_device *netdev = adapter->netdev;
391 e1000_set_rx_mode(netdev);
393 e1000_restore_vlan(adapter);
394 e1000_init_manageability(adapter);
396 e1000_configure_tx(adapter);
397 e1000_setup_rctl(adapter);
398 e1000_configure_rx(adapter);
399 /* call E1000_DESC_UNUSED which always leaves
400 * at least 1 descriptor unused to make sure
401 * 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 ***
439 void e1000_power_up_phy(struct e1000_adapter *adapter)
441 struct e1000_hw *hw = &adapter->hw;
444 /* Just clear the power down bit to wake the phy back up */
445 if (hw->media_type == e1000_media_type_copper) {
446 /* according to the manual, the phy will retain its
447 * settings across a power-down/up cycle */
448 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
449 mii_reg &= ~MII_CR_POWER_DOWN;
450 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
454 static void e1000_power_down_phy(struct e1000_adapter *adapter)
456 struct e1000_hw *hw = &adapter->hw;
458 /* Power down the PHY so no link is implied when interface is down *
459 * The PHY cannot be powered down if any of the following is true *
462 * (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);
496 cancel_work_sync(&adapter->reset_task);
497 cancel_delayed_work_sync(&adapter->watchdog_task);
498 cancel_delayed_work_sync(&adapter->phy_info_task);
499 cancel_delayed_work_sync(&adapter->fifo_stall_task);
502 void e1000_down(struct e1000_adapter *adapter)
504 struct e1000_hw *hw = &adapter->hw;
505 struct net_device *netdev = adapter->netdev;
509 /* disable receives in the hardware */
511 ew32(RCTL, rctl & ~E1000_RCTL_EN);
512 /* flush and sleep below */
514 netif_tx_disable(netdev);
516 /* disable transmits in the hardware */
518 tctl &= ~E1000_TCTL_EN;
520 /* flush both disables and wait for them to finish */
524 napi_disable(&adapter->napi);
526 e1000_irq_disable(adapter);
529 * Setting DOWN must be after irq_disable to prevent
530 * a screaming interrupt. Setting DOWN also prevents
531 * tasks from rescheduling.
533 e1000_down_and_stop(adapter);
535 adapter->link_speed = 0;
536 adapter->link_duplex = 0;
537 netif_carrier_off(netdev);
539 e1000_reset(adapter);
540 e1000_clean_all_tx_rings(adapter);
541 e1000_clean_all_rx_rings(adapter);
544 static void e1000_reinit_safe(struct e1000_adapter *adapter)
546 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
548 mutex_lock(&adapter->mutex);
551 mutex_unlock(&adapter->mutex);
552 clear_bit(__E1000_RESETTING, &adapter->flags);
555 void e1000_reinit_locked(struct e1000_adapter *adapter)
557 /* if rtnl_lock is not held the call path is bogus */
559 WARN_ON(in_interrupt());
560 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
564 clear_bit(__E1000_RESETTING, &adapter->flags);
567 void e1000_reset(struct e1000_adapter *adapter)
569 struct e1000_hw *hw = &adapter->hw;
570 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
571 bool legacy_pba_adjust = false;
574 /* Repartition Pba for greater than 9k mtu
575 * To take effect CTRL.RST is required.
578 switch (hw->mac_type) {
579 case e1000_82542_rev2_0:
580 case e1000_82542_rev2_1:
585 case e1000_82541_rev_2:
586 legacy_pba_adjust = true;
590 case e1000_82545_rev_3:
593 case e1000_82546_rev_3:
597 case e1000_82547_rev_2:
598 legacy_pba_adjust = true;
601 case e1000_undefined:
606 if (legacy_pba_adjust) {
607 if (hw->max_frame_size > E1000_RXBUFFER_8192)
608 pba -= 8; /* allocate more FIFO for Tx */
610 if (hw->mac_type == e1000_82547) {
611 adapter->tx_fifo_head = 0;
612 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
613 adapter->tx_fifo_size =
614 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
615 atomic_set(&adapter->tx_fifo_stall, 0);
617 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
618 /* adjust PBA for jumbo frames */
621 /* To maintain wire speed transmits, the Tx FIFO should be
622 * large enough to accommodate two full transmit packets,
623 * rounded up to the next 1KB and expressed in KB. Likewise,
624 * the Rx FIFO should be large enough to accommodate at least
625 * one full receive packet and is similarly rounded up and
626 * expressed in KB. */
628 /* upper 16 bits has Tx packet buffer allocation size in KB */
629 tx_space = pba >> 16;
630 /* lower 16 bits has Rx packet buffer allocation size in KB */
633 * the tx fifo also stores 16 bytes of information about the tx
634 * but don't include ethernet FCS because hardware appends it
636 min_tx_space = (hw->max_frame_size +
637 sizeof(struct e1000_tx_desc) -
639 min_tx_space = ALIGN(min_tx_space, 1024);
641 /* software strips receive CRC, so leave room for it */
642 min_rx_space = hw->max_frame_size;
643 min_rx_space = ALIGN(min_rx_space, 1024);
646 /* If current Tx allocation is less than the min Tx FIFO size,
647 * and the min Tx FIFO size is less than the current Rx FIFO
648 * allocation, take space away from current Rx allocation */
649 if (tx_space < min_tx_space &&
650 ((min_tx_space - tx_space) < pba)) {
651 pba = pba - (min_tx_space - tx_space);
653 /* PCI/PCIx hardware has PBA alignment constraints */
654 switch (hw->mac_type) {
655 case e1000_82545 ... e1000_82546_rev_3:
656 pba &= ~(E1000_PBA_8K - 1);
662 /* if short on rx space, rx wins and must trump tx
663 * adjustment or use Early Receive if available */
664 if (pba < min_rx_space)
672 * flow control settings:
673 * The high water mark must be low enough to fit one full frame
674 * (or the size used for early receive) above it in the Rx FIFO.
675 * Set it to the lower of:
676 * - 90% of the Rx FIFO size, and
677 * - the full Rx FIFO size minus the early receive size (for parts
678 * with ERT support assuming ERT set to E1000_ERT_2048), or
679 * - the full Rx FIFO size minus one full frame
681 hwm = min(((pba << 10) * 9 / 10),
682 ((pba << 10) - hw->max_frame_size));
684 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
685 hw->fc_low_water = hw->fc_high_water - 8;
686 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
688 hw->fc = hw->original_fc;
690 /* Allow time for pending master requests to run */
692 if (hw->mac_type >= e1000_82544)
695 if (e1000_init_hw(hw))
696 e_dev_err("Hardware Error\n");
697 e1000_update_mng_vlan(adapter);
699 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
700 if (hw->mac_type >= e1000_82544 &&
702 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
703 u32 ctrl = er32(CTRL);
704 /* clear phy power management bit if we are in gig only mode,
705 * which if enabled will attempt negotiation to 100Mb, which
706 * can cause a loss of link at power off or driver unload */
707 ctrl &= ~E1000_CTRL_SWDPIN3;
711 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
712 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
714 e1000_reset_adaptive(hw);
715 e1000_phy_get_info(hw, &adapter->phy_info);
717 e1000_release_manageability(adapter);
721 * Dump the eeprom for users having checksum issues
723 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
725 struct net_device *netdev = adapter->netdev;
726 struct ethtool_eeprom eeprom;
727 const struct ethtool_ops *ops = netdev->ethtool_ops;
730 u16 csum_old, csum_new = 0;
732 eeprom.len = ops->get_eeprom_len(netdev);
735 data = kmalloc(eeprom.len, GFP_KERNEL);
739 ops->get_eeprom(netdev, &eeprom, data);
741 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
742 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
743 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
744 csum_new += data[i] + (data[i + 1] << 8);
745 csum_new = EEPROM_SUM - csum_new;
747 pr_err("/*********************/\n");
748 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
749 pr_err("Calculated : 0x%04x\n", csum_new);
751 pr_err("Offset Values\n");
752 pr_err("======== ======\n");
753 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
755 pr_err("Include this output when contacting your support provider.\n");
756 pr_err("This is not a software error! Something bad happened to\n");
757 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
758 pr_err("result in further problems, possibly loss of data,\n");
759 pr_err("corruption or system hangs!\n");
760 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
761 pr_err("which is invalid and requires you to set the proper MAC\n");
762 pr_err("address manually before continuing to enable this network\n");
763 pr_err("device. Please inspect the EEPROM dump and report the\n");
764 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
765 pr_err("/*********************/\n");
771 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
772 * @pdev: PCI device information struct
774 * Return true if an adapter needs ioport resources
776 static int e1000_is_need_ioport(struct pci_dev *pdev)
778 switch (pdev->device) {
779 case E1000_DEV_ID_82540EM:
780 case E1000_DEV_ID_82540EM_LOM:
781 case E1000_DEV_ID_82540EP:
782 case E1000_DEV_ID_82540EP_LOM:
783 case E1000_DEV_ID_82540EP_LP:
784 case E1000_DEV_ID_82541EI:
785 case E1000_DEV_ID_82541EI_MOBILE:
786 case E1000_DEV_ID_82541ER:
787 case E1000_DEV_ID_82541ER_LOM:
788 case E1000_DEV_ID_82541GI:
789 case E1000_DEV_ID_82541GI_LF:
790 case E1000_DEV_ID_82541GI_MOBILE:
791 case E1000_DEV_ID_82544EI_COPPER:
792 case E1000_DEV_ID_82544EI_FIBER:
793 case E1000_DEV_ID_82544GC_COPPER:
794 case E1000_DEV_ID_82544GC_LOM:
795 case E1000_DEV_ID_82545EM_COPPER:
796 case E1000_DEV_ID_82545EM_FIBER:
797 case E1000_DEV_ID_82546EB_COPPER:
798 case E1000_DEV_ID_82546EB_FIBER:
799 case E1000_DEV_ID_82546EB_QUAD_COPPER:
806 static netdev_features_t e1000_fix_features(struct net_device *netdev,
807 netdev_features_t features)
810 * Since there is no support for separate rx/tx vlan accel
811 * enable/disable make sure tx flag is always in same state as rx.
813 if (features & NETIF_F_HW_VLAN_RX)
814 features |= NETIF_F_HW_VLAN_TX;
816 features &= ~NETIF_F_HW_VLAN_TX;
821 static int e1000_set_features(struct net_device *netdev,
822 netdev_features_t features)
824 struct e1000_adapter *adapter = netdev_priv(netdev);
825 netdev_features_t changed = features ^ netdev->features;
827 if (changed & NETIF_F_HW_VLAN_RX)
828 e1000_vlan_mode(netdev, features);
830 if (!(changed & NETIF_F_RXCSUM))
833 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
835 if (netif_running(netdev))
836 e1000_reinit_locked(adapter);
838 e1000_reset(adapter);
843 static const struct net_device_ops e1000_netdev_ops = {
844 .ndo_open = e1000_open,
845 .ndo_stop = e1000_close,
846 .ndo_start_xmit = e1000_xmit_frame,
847 .ndo_get_stats = e1000_get_stats,
848 .ndo_set_rx_mode = e1000_set_rx_mode,
849 .ndo_set_mac_address = e1000_set_mac,
850 .ndo_tx_timeout = e1000_tx_timeout,
851 .ndo_change_mtu = e1000_change_mtu,
852 .ndo_do_ioctl = e1000_ioctl,
853 .ndo_validate_addr = eth_validate_addr,
854 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
855 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
856 #ifdef CONFIG_NET_POLL_CONTROLLER
857 .ndo_poll_controller = e1000_netpoll,
859 .ndo_fix_features = e1000_fix_features,
860 .ndo_set_features = e1000_set_features,
864 * e1000_init_hw_struct - initialize members of hw struct
865 * @adapter: board private struct
866 * @hw: structure used by e1000_hw.c
868 * Factors out initialization of the e1000_hw struct to its own function
869 * that can be called very early at init (just after struct allocation).
870 * Fields are initialized based on PCI device information and
871 * OS network device settings (MTU size).
872 * Returns negative error codes if MAC type setup fails.
874 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
877 struct pci_dev *pdev = adapter->pdev;
879 /* PCI config space info */
880 hw->vendor_id = pdev->vendor;
881 hw->device_id = pdev->device;
882 hw->subsystem_vendor_id = pdev->subsystem_vendor;
883 hw->subsystem_id = pdev->subsystem_device;
884 hw->revision_id = pdev->revision;
886 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
888 hw->max_frame_size = adapter->netdev->mtu +
889 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
890 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
892 /* identify the MAC */
893 if (e1000_set_mac_type(hw)) {
894 e_err(probe, "Unknown MAC Type\n");
898 switch (hw->mac_type) {
903 case e1000_82541_rev_2:
904 case e1000_82547_rev_2:
905 hw->phy_init_script = 1;
909 e1000_set_media_type(hw);
910 e1000_get_bus_info(hw);
912 hw->wait_autoneg_complete = false;
913 hw->tbi_compatibility_en = true;
914 hw->adaptive_ifs = true;
918 if (hw->media_type == e1000_media_type_copper) {
919 hw->mdix = AUTO_ALL_MODES;
920 hw->disable_polarity_correction = false;
921 hw->master_slave = E1000_MASTER_SLAVE;
928 * e1000_probe - Device Initialization Routine
929 * @pdev: PCI device information struct
930 * @ent: entry in e1000_pci_tbl
932 * Returns 0 on success, negative on failure
934 * e1000_probe initializes an adapter identified by a pci_dev structure.
935 * The OS initialization, configuring of the adapter private structure,
936 * and a hardware reset occur.
938 static int __devinit e1000_probe(struct pci_dev *pdev,
939 const struct pci_device_id *ent)
941 struct net_device *netdev;
942 struct e1000_adapter *adapter;
945 static int cards_found = 0;
946 static int global_quad_port_a = 0; /* global ksp3 port a indication */
947 int i, err, pci_using_dac;
950 u16 eeprom_apme_mask = E1000_EEPROM_APME;
951 int bars, need_ioport;
953 /* do not allocate ioport bars when not needed */
954 need_ioport = e1000_is_need_ioport(pdev);
956 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
957 err = pci_enable_device(pdev);
959 bars = pci_select_bars(pdev, IORESOURCE_MEM);
960 err = pci_enable_device_mem(pdev);
965 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
969 pci_set_master(pdev);
970 err = pci_save_state(pdev);
972 goto err_alloc_etherdev;
975 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
977 goto err_alloc_etherdev;
979 SET_NETDEV_DEV(netdev, &pdev->dev);
981 pci_set_drvdata(pdev, netdev);
982 adapter = netdev_priv(netdev);
983 adapter->netdev = netdev;
984 adapter->pdev = pdev;
985 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
986 adapter->bars = bars;
987 adapter->need_ioport = need_ioport;
993 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
997 if (adapter->need_ioport) {
998 for (i = BAR_1; i <= BAR_5; i++) {
999 if (pci_resource_len(pdev, i) == 0)
1001 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1002 hw->io_base = pci_resource_start(pdev, i);
1008 /* make ready for any if (hw->...) below */
1009 err = e1000_init_hw_struct(adapter, hw);
1014 * there is a workaround being applied below that limits
1015 * 64-bit DMA addresses to 64-bit hardware. There are some
1016 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1019 if ((hw->bus_type == e1000_bus_type_pcix) &&
1020 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
1022 * according to DMA-API-HOWTO, coherent calls will always
1023 * succeed if the set call did
1025 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
1028 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1030 pr_err("No usable DMA config, aborting\n");
1033 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1036 netdev->netdev_ops = &e1000_netdev_ops;
1037 e1000_set_ethtool_ops(netdev);
1038 netdev->watchdog_timeo = 5 * HZ;
1039 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1041 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1043 adapter->bd_number = cards_found;
1045 /* setup the private structure */
1047 err = e1000_sw_init(adapter);
1052 if (hw->mac_type == e1000_ce4100) {
1053 hw->ce4100_gbe_mdio_base_virt =
1054 ioremap(pci_resource_start(pdev, BAR_1),
1055 pci_resource_len(pdev, BAR_1));
1057 if (!hw->ce4100_gbe_mdio_base_virt)
1058 goto err_mdio_ioremap;
1061 if (hw->mac_type >= e1000_82543) {
1062 netdev->hw_features = NETIF_F_SG |
1065 netdev->features = NETIF_F_HW_VLAN_TX |
1066 NETIF_F_HW_VLAN_FILTER;
1069 if ((hw->mac_type >= e1000_82544) &&
1070 (hw->mac_type != e1000_82547))
1071 netdev->hw_features |= NETIF_F_TSO;
1073 netdev->priv_flags |= IFF_SUPP_NOFCS;
1075 netdev->features |= netdev->hw_features;
1076 netdev->hw_features |= NETIF_F_RXCSUM;
1077 netdev->hw_features |= NETIF_F_RXFCS;
1079 if (pci_using_dac) {
1080 netdev->features |= NETIF_F_HIGHDMA;
1081 netdev->vlan_features |= NETIF_F_HIGHDMA;
1084 netdev->vlan_features |= NETIF_F_TSO;
1085 netdev->vlan_features |= NETIF_F_HW_CSUM;
1086 netdev->vlan_features |= NETIF_F_SG;
1088 netdev->priv_flags |= IFF_UNICAST_FLT;
1090 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1092 /* initialize eeprom parameters */
1093 if (e1000_init_eeprom_params(hw)) {
1094 e_err(probe, "EEPROM initialization failed\n");
1098 /* before reading the EEPROM, reset the controller to
1099 * put the device in a known good starting state */
1103 /* make sure the EEPROM is good */
1104 if (e1000_validate_eeprom_checksum(hw) < 0) {
1105 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1106 e1000_dump_eeprom(adapter);
1108 * set MAC address to all zeroes to invalidate and temporary
1109 * disable this device for the user. This blocks regular
1110 * traffic while still permitting ethtool ioctls from reaching
1111 * the hardware as well as allowing the user to run the
1112 * interface after manually setting a hw addr using
1115 memset(hw->mac_addr, 0, netdev->addr_len);
1117 /* copy the MAC address out of the EEPROM */
1118 if (e1000_read_mac_addr(hw))
1119 e_err(probe, "EEPROM Read Error\n");
1121 /* don't block initalization here due to bad MAC address */
1122 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1123 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1125 if (!is_valid_ether_addr(netdev->perm_addr))
1126 e_err(probe, "Invalid MAC Address\n");
1129 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1130 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1131 e1000_82547_tx_fifo_stall_task);
1132 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1133 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1135 e1000_check_options(adapter);
1137 /* Initial Wake on LAN setting
1138 * If APM wake is enabled in the EEPROM,
1139 * enable the ACPI Magic Packet filter
1142 switch (hw->mac_type) {
1143 case e1000_82542_rev2_0:
1144 case e1000_82542_rev2_1:
1148 e1000_read_eeprom(hw,
1149 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1150 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1153 case e1000_82546_rev_3:
1154 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1155 e1000_read_eeprom(hw,
1156 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1161 e1000_read_eeprom(hw,
1162 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1165 if (eeprom_data & eeprom_apme_mask)
1166 adapter->eeprom_wol |= E1000_WUFC_MAG;
1168 /* now that we have the eeprom settings, apply the special cases
1169 * where the eeprom may be wrong or the board simply won't support
1170 * wake on lan on a particular port */
1171 switch (pdev->device) {
1172 case E1000_DEV_ID_82546GB_PCIE:
1173 adapter->eeprom_wol = 0;
1175 case E1000_DEV_ID_82546EB_FIBER:
1176 case E1000_DEV_ID_82546GB_FIBER:
1177 /* Wake events only supported on port A for dual fiber
1178 * regardless of eeprom setting */
1179 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1180 adapter->eeprom_wol = 0;
1182 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1183 /* if quad port adapter, disable WoL on all but port A */
1184 if (global_quad_port_a != 0)
1185 adapter->eeprom_wol = 0;
1187 adapter->quad_port_a = true;
1188 /* Reset for multiple quad port adapters */
1189 if (++global_quad_port_a == 4)
1190 global_quad_port_a = 0;
1194 /* initialize the wol settings based on the eeprom settings */
1195 adapter->wol = adapter->eeprom_wol;
1196 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1198 /* Auto detect PHY address */
1199 if (hw->mac_type == e1000_ce4100) {
1200 for (i = 0; i < 32; i++) {
1202 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1203 if (tmp == 0 || tmp == 0xFF) {
1212 /* reset the hardware with the new settings */
1213 e1000_reset(adapter);
1215 strcpy(netdev->name, "eth%d");
1216 err = register_netdev(netdev);
1220 e1000_vlan_filter_on_off(adapter, false);
1222 /* print bus type/speed/width info */
1223 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1224 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1225 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1226 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1227 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1228 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1229 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1232 /* carrier off reporting is important to ethtool even BEFORE open */
1233 netif_carrier_off(netdev);
1235 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1242 e1000_phy_hw_reset(hw);
1244 if (hw->flash_address)
1245 iounmap(hw->flash_address);
1246 kfree(adapter->tx_ring);
1247 kfree(adapter->rx_ring);
1251 iounmap(hw->ce4100_gbe_mdio_base_virt);
1252 iounmap(hw->hw_addr);
1254 free_netdev(netdev);
1256 pci_release_selected_regions(pdev, bars);
1258 pci_disable_device(pdev);
1263 * e1000_remove - Device Removal Routine
1264 * @pdev: PCI device information struct
1266 * e1000_remove is called by the PCI subsystem to alert the driver
1267 * that it should release a PCI device. The could be caused by a
1268 * Hot-Plug event, or because the driver is going to be removed from
1272 static void __devexit e1000_remove(struct pci_dev *pdev)
1274 struct net_device *netdev = pci_get_drvdata(pdev);
1275 struct e1000_adapter *adapter = netdev_priv(netdev);
1276 struct e1000_hw *hw = &adapter->hw;
1278 e1000_down_and_stop(adapter);
1279 e1000_release_manageability(adapter);
1281 unregister_netdev(netdev);
1283 e1000_phy_hw_reset(hw);
1285 kfree(adapter->tx_ring);
1286 kfree(adapter->rx_ring);
1288 if (hw->mac_type == e1000_ce4100)
1289 iounmap(hw->ce4100_gbe_mdio_base_virt);
1290 iounmap(hw->hw_addr);
1291 if (hw->flash_address)
1292 iounmap(hw->flash_address);
1293 pci_release_selected_regions(pdev, adapter->bars);
1295 free_netdev(netdev);
1297 pci_disable_device(pdev);
1301 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1302 * @adapter: board private structure to initialize
1304 * e1000_sw_init initializes the Adapter private data structure.
1305 * e1000_init_hw_struct MUST be called before this function
1308 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1310 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1312 adapter->num_tx_queues = 1;
1313 adapter->num_rx_queues = 1;
1315 if (e1000_alloc_queues(adapter)) {
1316 e_err(probe, "Unable to allocate memory for queues\n");
1320 /* Explicitly disable IRQ since the NIC can be in any state. */
1321 e1000_irq_disable(adapter);
1323 spin_lock_init(&adapter->stats_lock);
1324 mutex_init(&adapter->mutex);
1326 set_bit(__E1000_DOWN, &adapter->flags);
1332 * e1000_alloc_queues - Allocate memory for all rings
1333 * @adapter: board private structure to initialize
1335 * We allocate one ring per queue at run-time since we don't know the
1336 * number of queues at compile-time.
1339 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1341 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1342 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1343 if (!adapter->tx_ring)
1346 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1347 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1348 if (!adapter->rx_ring) {
1349 kfree(adapter->tx_ring);
1353 return E1000_SUCCESS;
1357 * e1000_open - Called when a network interface is made active
1358 * @netdev: network interface device structure
1360 * Returns 0 on success, negative value on failure
1362 * The open entry point is called when a network interface is made
1363 * active by the system (IFF_UP). At this point all resources needed
1364 * for transmit and receive operations are allocated, the interrupt
1365 * handler is registered with the OS, the watchdog task is started,
1366 * and the stack is notified that the interface is ready.
1369 static int e1000_open(struct net_device *netdev)
1371 struct e1000_adapter *adapter = netdev_priv(netdev);
1372 struct e1000_hw *hw = &adapter->hw;
1375 /* disallow open during test */
1376 if (test_bit(__E1000_TESTING, &adapter->flags))
1379 netif_carrier_off(netdev);
1381 /* allocate transmit descriptors */
1382 err = e1000_setup_all_tx_resources(adapter);
1386 /* allocate receive descriptors */
1387 err = e1000_setup_all_rx_resources(adapter);
1391 e1000_power_up_phy(adapter);
1393 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1394 if ((hw->mng_cookie.status &
1395 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1396 e1000_update_mng_vlan(adapter);
1399 /* before we allocate an interrupt, we must be ready to handle it.
1400 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1401 * as soon as we call pci_request_irq, so we have to setup our
1402 * clean_rx handler before we do so. */
1403 e1000_configure(adapter);
1405 err = e1000_request_irq(adapter);
1409 /* From here on the code is the same as e1000_up() */
1410 clear_bit(__E1000_DOWN, &adapter->flags);
1412 napi_enable(&adapter->napi);
1414 e1000_irq_enable(adapter);
1416 netif_start_queue(netdev);
1418 /* fire a link status change interrupt to start the watchdog */
1419 ew32(ICS, E1000_ICS_LSC);
1421 return E1000_SUCCESS;
1424 e1000_power_down_phy(adapter);
1425 e1000_free_all_rx_resources(adapter);
1427 e1000_free_all_tx_resources(adapter);
1429 e1000_reset(adapter);
1435 * e1000_close - Disables a network interface
1436 * @netdev: network interface device structure
1438 * Returns 0, this is not allowed to fail
1440 * The close entry point is called when an interface is de-activated
1441 * by the OS. The hardware is still under the drivers control, but
1442 * needs to be disabled. A global MAC reset is issued to stop the
1443 * hardware, and all transmit and receive resources are freed.
1446 static int e1000_close(struct net_device *netdev)
1448 struct e1000_adapter *adapter = netdev_priv(netdev);
1449 struct e1000_hw *hw = &adapter->hw;
1451 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1452 e1000_down(adapter);
1453 e1000_power_down_phy(adapter);
1454 e1000_free_irq(adapter);
1456 e1000_free_all_tx_resources(adapter);
1457 e1000_free_all_rx_resources(adapter);
1459 /* kill manageability vlan ID if supported, but not if a vlan with
1460 * the same ID is registered on the host OS (let 8021q kill it) */
1461 if ((hw->mng_cookie.status &
1462 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1463 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1464 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1471 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1472 * @adapter: address of board private structure
1473 * @start: address of beginning of memory
1474 * @len: length of memory
1476 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1479 struct e1000_hw *hw = &adapter->hw;
1480 unsigned long begin = (unsigned long)start;
1481 unsigned long end = begin + len;
1483 /* First rev 82545 and 82546 need to not allow any memory
1484 * write location to cross 64k boundary due to errata 23 */
1485 if (hw->mac_type == e1000_82545 ||
1486 hw->mac_type == e1000_ce4100 ||
1487 hw->mac_type == e1000_82546) {
1488 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1495 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1496 * @adapter: board private structure
1497 * @txdr: tx descriptor ring (for a specific queue) to setup
1499 * Return 0 on success, negative on failure
1502 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1503 struct e1000_tx_ring *txdr)
1505 struct pci_dev *pdev = adapter->pdev;
1508 size = sizeof(struct e1000_buffer) * txdr->count;
1509 txdr->buffer_info = vzalloc(size);
1510 if (!txdr->buffer_info) {
1511 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1516 /* round up to nearest 4K */
1518 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1519 txdr->size = ALIGN(txdr->size, 4096);
1521 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1525 vfree(txdr->buffer_info);
1526 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1531 /* Fix for errata 23, can't cross 64kB boundary */
1532 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1533 void *olddesc = txdr->desc;
1534 dma_addr_t olddma = txdr->dma;
1535 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1536 txdr->size, txdr->desc);
1537 /* Try again, without freeing the previous */
1538 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1539 &txdr->dma, GFP_KERNEL);
1540 /* Failed allocation, critical failure */
1542 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1544 goto setup_tx_desc_die;
1547 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1549 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1551 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1553 e_err(probe, "Unable to allocate aligned memory "
1554 "for the transmit descriptor ring\n");
1555 vfree(txdr->buffer_info);
1558 /* Free old allocation, new allocation was successful */
1559 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1563 memset(txdr->desc, 0, txdr->size);
1565 txdr->next_to_use = 0;
1566 txdr->next_to_clean = 0;
1572 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1573 * (Descriptors) for all queues
1574 * @adapter: board private structure
1576 * Return 0 on success, negative on failure
1579 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1583 for (i = 0; i < adapter->num_tx_queues; i++) {
1584 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1586 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1587 for (i-- ; i >= 0; i--)
1588 e1000_free_tx_resources(adapter,
1589 &adapter->tx_ring[i]);
1598 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1599 * @adapter: board private structure
1601 * Configure the Tx unit of the MAC after a reset.
1604 static void e1000_configure_tx(struct e1000_adapter *adapter)
1607 struct e1000_hw *hw = &adapter->hw;
1608 u32 tdlen, tctl, tipg;
1611 /* Setup the HW Tx Head and Tail descriptor pointers */
1613 switch (adapter->num_tx_queues) {
1616 tdba = adapter->tx_ring[0].dma;
1617 tdlen = adapter->tx_ring[0].count *
1618 sizeof(struct e1000_tx_desc);
1620 ew32(TDBAH, (tdba >> 32));
1621 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1624 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1625 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1629 /* Set the default values for the Tx Inter Packet Gap timer */
1630 if ((hw->media_type == e1000_media_type_fiber ||
1631 hw->media_type == e1000_media_type_internal_serdes))
1632 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1634 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1636 switch (hw->mac_type) {
1637 case e1000_82542_rev2_0:
1638 case e1000_82542_rev2_1:
1639 tipg = DEFAULT_82542_TIPG_IPGT;
1640 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1641 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1644 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1645 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1648 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1649 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1652 /* Set the Tx Interrupt Delay register */
1654 ew32(TIDV, adapter->tx_int_delay);
1655 if (hw->mac_type >= e1000_82540)
1656 ew32(TADV, adapter->tx_abs_int_delay);
1658 /* Program the Transmit Control Register */
1661 tctl &= ~E1000_TCTL_CT;
1662 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1663 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1665 e1000_config_collision_dist(hw);
1667 /* Setup Transmit Descriptor Settings for eop descriptor */
1668 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1670 /* only set IDE if we are delaying interrupts using the timers */
1671 if (adapter->tx_int_delay)
1672 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1674 if (hw->mac_type < e1000_82543)
1675 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1677 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1679 /* Cache if we're 82544 running in PCI-X because we'll
1680 * need this to apply a workaround later in the send path. */
1681 if (hw->mac_type == e1000_82544 &&
1682 hw->bus_type == e1000_bus_type_pcix)
1683 adapter->pcix_82544 = true;
1690 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1691 * @adapter: board private structure
1692 * @rxdr: rx descriptor ring (for a specific queue) to setup
1694 * Returns 0 on success, negative on failure
1697 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1698 struct e1000_rx_ring *rxdr)
1700 struct pci_dev *pdev = adapter->pdev;
1703 size = sizeof(struct e1000_buffer) * rxdr->count;
1704 rxdr->buffer_info = vzalloc(size);
1705 if (!rxdr->buffer_info) {
1706 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1711 desc_len = sizeof(struct e1000_rx_desc);
1713 /* Round up to nearest 4K */
1715 rxdr->size = rxdr->count * desc_len;
1716 rxdr->size = ALIGN(rxdr->size, 4096);
1718 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1722 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1725 vfree(rxdr->buffer_info);
1729 /* Fix for errata 23, can't cross 64kB boundary */
1730 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1731 void *olddesc = rxdr->desc;
1732 dma_addr_t olddma = rxdr->dma;
1733 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1734 rxdr->size, rxdr->desc);
1735 /* Try again, without freeing the previous */
1736 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1737 &rxdr->dma, GFP_KERNEL);
1738 /* Failed allocation, critical failure */
1740 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1742 e_err(probe, "Unable to allocate memory for the Rx "
1743 "descriptor ring\n");
1744 goto setup_rx_desc_die;
1747 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1749 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1751 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1753 e_err(probe, "Unable to allocate aligned memory for "
1754 "the Rx descriptor ring\n");
1755 goto setup_rx_desc_die;
1757 /* Free old allocation, new allocation was successful */
1758 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1762 memset(rxdr->desc, 0, rxdr->size);
1764 rxdr->next_to_clean = 0;
1765 rxdr->next_to_use = 0;
1766 rxdr->rx_skb_top = NULL;
1772 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1773 * (Descriptors) for all queues
1774 * @adapter: board private structure
1776 * Return 0 on success, negative on failure
1779 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1783 for (i = 0; i < adapter->num_rx_queues; i++) {
1784 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1786 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1787 for (i-- ; i >= 0; i--)
1788 e1000_free_rx_resources(adapter,
1789 &adapter->rx_ring[i]);
1798 * e1000_setup_rctl - configure the receive control registers
1799 * @adapter: Board private structure
1801 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1803 struct e1000_hw *hw = &adapter->hw;
1808 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1810 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1811 E1000_RCTL_RDMTS_HALF |
1812 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1814 if (hw->tbi_compatibility_on == 1)
1815 rctl |= E1000_RCTL_SBP;
1817 rctl &= ~E1000_RCTL_SBP;
1819 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1820 rctl &= ~E1000_RCTL_LPE;
1822 rctl |= E1000_RCTL_LPE;
1824 /* Setup buffer sizes */
1825 rctl &= ~E1000_RCTL_SZ_4096;
1826 rctl |= E1000_RCTL_BSEX;
1827 switch (adapter->rx_buffer_len) {
1828 case E1000_RXBUFFER_2048:
1830 rctl |= E1000_RCTL_SZ_2048;
1831 rctl &= ~E1000_RCTL_BSEX;
1833 case E1000_RXBUFFER_4096:
1834 rctl |= E1000_RCTL_SZ_4096;
1836 case E1000_RXBUFFER_8192:
1837 rctl |= E1000_RCTL_SZ_8192;
1839 case E1000_RXBUFFER_16384:
1840 rctl |= E1000_RCTL_SZ_16384;
1848 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1849 * @adapter: board private structure
1851 * Configure the Rx unit of the MAC after a reset.
1854 static void e1000_configure_rx(struct e1000_adapter *adapter)
1857 struct e1000_hw *hw = &adapter->hw;
1858 u32 rdlen, rctl, rxcsum;
1860 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1861 rdlen = adapter->rx_ring[0].count *
1862 sizeof(struct e1000_rx_desc);
1863 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1864 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1866 rdlen = adapter->rx_ring[0].count *
1867 sizeof(struct e1000_rx_desc);
1868 adapter->clean_rx = e1000_clean_rx_irq;
1869 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1872 /* disable receives while setting up the descriptors */
1874 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1876 /* set the Receive Delay Timer Register */
1877 ew32(RDTR, adapter->rx_int_delay);
1879 if (hw->mac_type >= e1000_82540) {
1880 ew32(RADV, adapter->rx_abs_int_delay);
1881 if (adapter->itr_setting != 0)
1882 ew32(ITR, 1000000000 / (adapter->itr * 256));
1885 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1886 * the Base and Length of the Rx Descriptor Ring */
1887 switch (adapter->num_rx_queues) {
1890 rdba = adapter->rx_ring[0].dma;
1892 ew32(RDBAH, (rdba >> 32));
1893 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1896 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1897 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? 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
1924 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1925 struct e1000_tx_ring *tx_ring)
1927 struct pci_dev *pdev = adapter->pdev;
1929 e1000_clean_tx_ring(adapter, tx_ring);
1931 vfree(tx_ring->buffer_info);
1932 tx_ring->buffer_info = NULL;
1934 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1937 tx_ring->desc = NULL;
1941 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1942 * @adapter: board private structure
1944 * Free all transmit software resources
1947 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1951 for (i = 0; i < adapter->num_tx_queues; i++)
1952 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1955 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1956 struct e1000_buffer *buffer_info)
1958 if (buffer_info->dma) {
1959 if (buffer_info->mapped_as_page)
1960 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1961 buffer_info->length, DMA_TO_DEVICE);
1963 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1964 buffer_info->length,
1966 buffer_info->dma = 0;
1968 if (buffer_info->skb) {
1969 dev_kfree_skb_any(buffer_info->skb);
1970 buffer_info->skb = NULL;
1972 buffer_info->time_stamp = 0;
1973 /* buffer_info must be completely set up in the transmit path */
1977 * e1000_clean_tx_ring - Free Tx Buffers
1978 * @adapter: board private structure
1979 * @tx_ring: ring to be cleaned
1982 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1983 struct e1000_tx_ring *tx_ring)
1985 struct e1000_hw *hw = &adapter->hw;
1986 struct e1000_buffer *buffer_info;
1990 /* Free all the Tx ring sk_buffs */
1992 for (i = 0; i < tx_ring->count; i++) {
1993 buffer_info = &tx_ring->buffer_info[i];
1994 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1997 size = sizeof(struct e1000_buffer) * tx_ring->count;
1998 memset(tx_ring->buffer_info, 0, size);
2000 /* Zero out the descriptor ring */
2002 memset(tx_ring->desc, 0, tx_ring->size);
2004 tx_ring->next_to_use = 0;
2005 tx_ring->next_to_clean = 0;
2006 tx_ring->last_tx_tso = false;
2008 writel(0, hw->hw_addr + tx_ring->tdh);
2009 writel(0, hw->hw_addr + tx_ring->tdt);
2013 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2014 * @adapter: board private structure
2017 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2021 for (i = 0; i < adapter->num_tx_queues; i++)
2022 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2026 * e1000_free_rx_resources - Free Rx Resources
2027 * @adapter: board private structure
2028 * @rx_ring: ring to clean the resources from
2030 * Free all receive software resources
2033 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2034 struct e1000_rx_ring *rx_ring)
2036 struct pci_dev *pdev = adapter->pdev;
2038 e1000_clean_rx_ring(adapter, rx_ring);
2040 vfree(rx_ring->buffer_info);
2041 rx_ring->buffer_info = NULL;
2043 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2046 rx_ring->desc = NULL;
2050 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2051 * @adapter: board private structure
2053 * Free all receive software resources
2056 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2060 for (i = 0; i < adapter->num_rx_queues; i++)
2061 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2065 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2066 * @adapter: board private structure
2067 * @rx_ring: ring to free buffers from
2070 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2071 struct e1000_rx_ring *rx_ring)
2073 struct e1000_hw *hw = &adapter->hw;
2074 struct e1000_buffer *buffer_info;
2075 struct pci_dev *pdev = adapter->pdev;
2079 /* Free all the Rx ring sk_buffs */
2080 for (i = 0; i < rx_ring->count; i++) {
2081 buffer_info = &rx_ring->buffer_info[i];
2082 if (buffer_info->dma &&
2083 adapter->clean_rx == e1000_clean_rx_irq) {
2084 dma_unmap_single(&pdev->dev, buffer_info->dma,
2085 buffer_info->length,
2087 } else if (buffer_info->dma &&
2088 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2089 dma_unmap_page(&pdev->dev, buffer_info->dma,
2090 buffer_info->length,
2094 buffer_info->dma = 0;
2095 if (buffer_info->page) {
2096 put_page(buffer_info->page);
2097 buffer_info->page = NULL;
2099 if (buffer_info->skb) {
2100 dev_kfree_skb(buffer_info->skb);
2101 buffer_info->skb = NULL;
2105 /* there also may be some cached data from a chained receive */
2106 if (rx_ring->rx_skb_top) {
2107 dev_kfree_skb(rx_ring->rx_skb_top);
2108 rx_ring->rx_skb_top = NULL;
2111 size = sizeof(struct e1000_buffer) * rx_ring->count;
2112 memset(rx_ring->buffer_info, 0, size);
2114 /* Zero out the descriptor ring */
2115 memset(rx_ring->desc, 0, rx_ring->size);
2117 rx_ring->next_to_clean = 0;
2118 rx_ring->next_to_use = 0;
2120 writel(0, hw->hw_addr + rx_ring->rdh);
2121 writel(0, hw->hw_addr + rx_ring->rdt);
2125 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2126 * @adapter: board private structure
2129 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2133 for (i = 0; i < adapter->num_rx_queues; i++)
2134 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2137 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2138 * and memory write and invalidate disabled for certain operations
2140 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2142 struct e1000_hw *hw = &adapter->hw;
2143 struct net_device *netdev = adapter->netdev;
2146 e1000_pci_clear_mwi(hw);
2149 rctl |= E1000_RCTL_RST;
2151 E1000_WRITE_FLUSH();
2154 if (netif_running(netdev))
2155 e1000_clean_all_rx_rings(adapter);
2158 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2160 struct e1000_hw *hw = &adapter->hw;
2161 struct net_device *netdev = adapter->netdev;
2165 rctl &= ~E1000_RCTL_RST;
2167 E1000_WRITE_FLUSH();
2170 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2171 e1000_pci_set_mwi(hw);
2173 if (netif_running(netdev)) {
2174 /* No need to loop, because 82542 supports only 1 queue */
2175 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2176 e1000_configure_rx(adapter);
2177 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2182 * e1000_set_mac - Change the Ethernet Address of the NIC
2183 * @netdev: network interface device structure
2184 * @p: pointer to an address structure
2186 * Returns 0 on success, negative on failure
2189 static int e1000_set_mac(struct net_device *netdev, void *p)
2191 struct e1000_adapter *adapter = netdev_priv(netdev);
2192 struct e1000_hw *hw = &adapter->hw;
2193 struct sockaddr *addr = p;
2195 if (!is_valid_ether_addr(addr->sa_data))
2196 return -EADDRNOTAVAIL;
2198 /* 82542 2.0 needs to be in reset to write receive address registers */
2200 if (hw->mac_type == e1000_82542_rev2_0)
2201 e1000_enter_82542_rst(adapter);
2203 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2204 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2206 e1000_rar_set(hw, hw->mac_addr, 0);
2208 if (hw->mac_type == e1000_82542_rev2_0)
2209 e1000_leave_82542_rst(adapter);
2215 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2216 * @netdev: network interface device structure
2218 * The set_rx_mode entry point is called whenever the unicast or multicast
2219 * address lists or the network interface flags are updated. This routine is
2220 * responsible for configuring the hardware for proper unicast, multicast,
2221 * promiscuous mode, and all-multi behavior.
2224 static void e1000_set_rx_mode(struct net_device *netdev)
2226 struct e1000_adapter *adapter = netdev_priv(netdev);
2227 struct e1000_hw *hw = &adapter->hw;
2228 struct netdev_hw_addr *ha;
2229 bool use_uc = false;
2232 int i, rar_entries = E1000_RAR_ENTRIES;
2233 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2234 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2237 e_err(probe, "memory allocation failed\n");
2241 /* Check for Promiscuous and All Multicast modes */
2245 if (netdev->flags & IFF_PROMISC) {
2246 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2247 rctl &= ~E1000_RCTL_VFE;
2249 if (netdev->flags & IFF_ALLMULTI)
2250 rctl |= E1000_RCTL_MPE;
2252 rctl &= ~E1000_RCTL_MPE;
2253 /* Enable VLAN filter if there is a VLAN */
2254 if (e1000_vlan_used(adapter))
2255 rctl |= E1000_RCTL_VFE;
2258 if (netdev_uc_count(netdev) > rar_entries - 1) {
2259 rctl |= E1000_RCTL_UPE;
2260 } else if (!(netdev->flags & IFF_PROMISC)) {
2261 rctl &= ~E1000_RCTL_UPE;
2267 /* 82542 2.0 needs to be in reset to write receive address registers */
2269 if (hw->mac_type == e1000_82542_rev2_0)
2270 e1000_enter_82542_rst(adapter);
2272 /* load the first 14 addresses into the exact filters 1-14. Unicast
2273 * addresses take precedence to avoid disabling unicast filtering
2276 * RAR 0 is used for the station MAC address
2277 * if there are not 14 addresses, go ahead and clear the filters
2281 netdev_for_each_uc_addr(ha, netdev) {
2282 if (i == rar_entries)
2284 e1000_rar_set(hw, ha->addr, i++);
2287 netdev_for_each_mc_addr(ha, netdev) {
2288 if (i == rar_entries) {
2289 /* load any remaining addresses into the hash table */
2290 u32 hash_reg, hash_bit, mta;
2291 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2292 hash_reg = (hash_value >> 5) & 0x7F;
2293 hash_bit = hash_value & 0x1F;
2294 mta = (1 << hash_bit);
2295 mcarray[hash_reg] |= mta;
2297 e1000_rar_set(hw, ha->addr, i++);
2301 for (; i < rar_entries; i++) {
2302 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2303 E1000_WRITE_FLUSH();
2304 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2305 E1000_WRITE_FLUSH();
2308 /* write the hash table completely, write from bottom to avoid
2309 * both stupid write combining chipsets, and flushing each write */
2310 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2312 * If we are on an 82544 has an errata where writing odd
2313 * offsets overwrites the previous even offset, but writing
2314 * backwards over the range solves the issue by always
2315 * writing the odd offset first
2317 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2319 E1000_WRITE_FLUSH();
2321 if (hw->mac_type == e1000_82542_rev2_0)
2322 e1000_leave_82542_rst(adapter);
2328 * e1000_update_phy_info_task - get phy info
2329 * @work: work struct contained inside adapter struct
2331 * Need to wait a few seconds after link up to get diagnostic information from
2334 static void e1000_update_phy_info_task(struct work_struct *work)
2336 struct e1000_adapter *adapter = container_of(work,
2337 struct e1000_adapter,
2338 phy_info_task.work);
2339 if (test_bit(__E1000_DOWN, &adapter->flags))
2341 mutex_lock(&adapter->mutex);
2342 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2343 mutex_unlock(&adapter->mutex);
2347 * e1000_82547_tx_fifo_stall_task - task to complete work
2348 * @work: work struct contained inside adapter struct
2350 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2352 struct e1000_adapter *adapter = container_of(work,
2353 struct e1000_adapter,
2354 fifo_stall_task.work);
2355 struct e1000_hw *hw = &adapter->hw;
2356 struct net_device *netdev = adapter->netdev;
2359 if (test_bit(__E1000_DOWN, &adapter->flags))
2361 mutex_lock(&adapter->mutex);
2362 if (atomic_read(&adapter->tx_fifo_stall)) {
2363 if ((er32(TDT) == er32(TDH)) &&
2364 (er32(TDFT) == er32(TDFH)) &&
2365 (er32(TDFTS) == er32(TDFHS))) {
2367 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2368 ew32(TDFT, adapter->tx_head_addr);
2369 ew32(TDFH, adapter->tx_head_addr);
2370 ew32(TDFTS, adapter->tx_head_addr);
2371 ew32(TDFHS, adapter->tx_head_addr);
2373 E1000_WRITE_FLUSH();
2375 adapter->tx_fifo_head = 0;
2376 atomic_set(&adapter->tx_fifo_stall, 0);
2377 netif_wake_queue(netdev);
2378 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2379 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2382 mutex_unlock(&adapter->mutex);
2385 bool e1000_has_link(struct e1000_adapter *adapter)
2387 struct e1000_hw *hw = &adapter->hw;
2388 bool link_active = false;
2390 /* get_link_status is set on LSC (link status) interrupt or rx
2391 * sequence error interrupt (except on intel ce4100).
2392 * get_link_status will stay false until the
2393 * e1000_check_for_link establishes link for copper adapters
2396 switch (hw->media_type) {
2397 case e1000_media_type_copper:
2398 if (hw->mac_type == e1000_ce4100)
2399 hw->get_link_status = 1;
2400 if (hw->get_link_status) {
2401 e1000_check_for_link(hw);
2402 link_active = !hw->get_link_status;
2407 case e1000_media_type_fiber:
2408 e1000_check_for_link(hw);
2409 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2411 case e1000_media_type_internal_serdes:
2412 e1000_check_for_link(hw);
2413 link_active = hw->serdes_has_link;
2423 * e1000_watchdog - work function
2424 * @work: work struct contained inside adapter struct
2426 static void e1000_watchdog(struct work_struct *work)
2428 struct e1000_adapter *adapter = container_of(work,
2429 struct e1000_adapter,
2430 watchdog_task.work);
2431 struct e1000_hw *hw = &adapter->hw;
2432 struct net_device *netdev = adapter->netdev;
2433 struct e1000_tx_ring *txdr = adapter->tx_ring;
2436 if (test_bit(__E1000_DOWN, &adapter->flags))
2439 mutex_lock(&adapter->mutex);
2440 link = e1000_has_link(adapter);
2441 if ((netif_carrier_ok(netdev)) && link)
2445 if (!netif_carrier_ok(netdev)) {
2448 /* update snapshot of PHY registers on LSC */
2449 e1000_get_speed_and_duplex(hw,
2450 &adapter->link_speed,
2451 &adapter->link_duplex);
2454 pr_info("%s NIC Link is Up %d Mbps %s, "
2455 "Flow Control: %s\n",
2457 adapter->link_speed,
2458 adapter->link_duplex == FULL_DUPLEX ?
2459 "Full Duplex" : "Half Duplex",
2460 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2461 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2462 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2463 E1000_CTRL_TFCE) ? "TX" : "None")));
2465 /* adjust timeout factor according to speed/duplex */
2466 adapter->tx_timeout_factor = 1;
2467 switch (adapter->link_speed) {
2470 adapter->tx_timeout_factor = 16;
2474 /* maybe add some timeout factor ? */
2478 /* enable transmits in the hardware */
2480 tctl |= E1000_TCTL_EN;
2483 netif_carrier_on(netdev);
2484 if (!test_bit(__E1000_DOWN, &adapter->flags))
2485 schedule_delayed_work(&adapter->phy_info_task,
2487 adapter->smartspeed = 0;
2490 if (netif_carrier_ok(netdev)) {
2491 adapter->link_speed = 0;
2492 adapter->link_duplex = 0;
2493 pr_info("%s NIC Link is Down\n",
2495 netif_carrier_off(netdev);
2497 if (!test_bit(__E1000_DOWN, &adapter->flags))
2498 schedule_delayed_work(&adapter->phy_info_task,
2502 e1000_smartspeed(adapter);
2506 e1000_update_stats(adapter);
2508 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2509 adapter->tpt_old = adapter->stats.tpt;
2510 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2511 adapter->colc_old = adapter->stats.colc;
2513 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2514 adapter->gorcl_old = adapter->stats.gorcl;
2515 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2516 adapter->gotcl_old = adapter->stats.gotcl;
2518 e1000_update_adaptive(hw);
2520 if (!netif_carrier_ok(netdev)) {
2521 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2522 /* We've lost link, so the controller stops DMA,
2523 * but we've got queued Tx work that's never going
2524 * to get done, so reset controller to flush Tx.
2525 * (Do the reset outside of interrupt context). */
2526 adapter->tx_timeout_count++;
2527 schedule_work(&adapter->reset_task);
2528 /* exit immediately since reset is imminent */
2533 /* Simple mode for Interrupt Throttle Rate (ITR) */
2534 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2536 * Symmetric Tx/Rx gets a reduced ITR=2000;
2537 * Total asymmetrical Tx or Rx gets ITR=8000;
2538 * everyone else is between 2000-8000.
2540 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2541 u32 dif = (adapter->gotcl > adapter->gorcl ?
2542 adapter->gotcl - adapter->gorcl :
2543 adapter->gorcl - adapter->gotcl) / 10000;
2544 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2546 ew32(ITR, 1000000000 / (itr * 256));
2549 /* Cause software interrupt to ensure rx ring is cleaned */
2550 ew32(ICS, E1000_ICS_RXDMT0);
2552 /* Force detection of hung controller every watchdog period */
2553 adapter->detect_tx_hung = true;
2555 /* Reschedule the task */
2556 if (!test_bit(__E1000_DOWN, &adapter->flags))
2557 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2560 mutex_unlock(&adapter->mutex);
2563 enum latency_range {
2567 latency_invalid = 255
2571 * e1000_update_itr - update the dynamic ITR value based on statistics
2572 * @adapter: pointer to adapter
2573 * @itr_setting: current adapter->itr
2574 * @packets: the number of packets during this measurement interval
2575 * @bytes: the number of bytes during this measurement interval
2577 * Stores a new ITR value based on packets and byte
2578 * counts during the last interrupt. The advantage of per interrupt
2579 * computation is faster updates and more accurate ITR for the current
2580 * traffic pattern. Constants in this function were computed
2581 * based on theoretical maximum wire speed and thresholds were set based
2582 * on testing data as well as attempting to minimize response time
2583 * while increasing bulk throughput.
2584 * this functionality is controlled by the InterruptThrottleRate module
2585 * parameter (see e1000_param.c)
2587 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2588 u16 itr_setting, int packets, int bytes)
2590 unsigned int retval = itr_setting;
2591 struct e1000_hw *hw = &adapter->hw;
2593 if (unlikely(hw->mac_type < e1000_82540))
2594 goto update_itr_done;
2597 goto update_itr_done;
2599 switch (itr_setting) {
2600 case lowest_latency:
2601 /* jumbo frames get bulk treatment*/
2602 if (bytes/packets > 8000)
2603 retval = bulk_latency;
2604 else if ((packets < 5) && (bytes > 512))
2605 retval = low_latency;
2607 case low_latency: /* 50 usec aka 20000 ints/s */
2608 if (bytes > 10000) {
2609 /* jumbo frames need bulk latency setting */
2610 if (bytes/packets > 8000)
2611 retval = bulk_latency;
2612 else if ((packets < 10) || ((bytes/packets) > 1200))
2613 retval = bulk_latency;
2614 else if ((packets > 35))
2615 retval = lowest_latency;
2616 } else if (bytes/packets > 2000)
2617 retval = bulk_latency;
2618 else if (packets <= 2 && bytes < 512)
2619 retval = lowest_latency;
2621 case bulk_latency: /* 250 usec aka 4000 ints/s */
2622 if (bytes > 25000) {
2624 retval = low_latency;
2625 } else if (bytes < 6000) {
2626 retval = low_latency;
2635 static void e1000_set_itr(struct e1000_adapter *adapter)
2637 struct e1000_hw *hw = &adapter->hw;
2639 u32 new_itr = adapter->itr;
2641 if (unlikely(hw->mac_type < e1000_82540))
2644 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2645 if (unlikely(adapter->link_speed != SPEED_1000)) {
2651 adapter->tx_itr = e1000_update_itr(adapter,
2653 adapter->total_tx_packets,
2654 adapter->total_tx_bytes);
2655 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2656 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2657 adapter->tx_itr = low_latency;
2659 adapter->rx_itr = e1000_update_itr(adapter,
2661 adapter->total_rx_packets,
2662 adapter->total_rx_bytes);
2663 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2664 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2665 adapter->rx_itr = low_latency;
2667 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2669 switch (current_itr) {
2670 /* counts and packets in update_itr are dependent on these numbers */
2671 case lowest_latency:
2675 new_itr = 20000; /* aka hwitr = ~200 */
2685 if (new_itr != adapter->itr) {
2686 /* this attempts to bias the interrupt rate towards Bulk
2687 * by adding intermediate steps when interrupt rate is
2689 new_itr = new_itr > adapter->itr ?
2690 min(adapter->itr + (new_itr >> 2), new_itr) :
2692 adapter->itr = new_itr;
2693 ew32(ITR, 1000000000 / (new_itr * 256));
2697 #define E1000_TX_FLAGS_CSUM 0x00000001
2698 #define E1000_TX_FLAGS_VLAN 0x00000002
2699 #define E1000_TX_FLAGS_TSO 0x00000004
2700 #define E1000_TX_FLAGS_IPV4 0x00000008
2701 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2702 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2703 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2705 static int e1000_tso(struct e1000_adapter *adapter,
2706 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2708 struct e1000_context_desc *context_desc;
2709 struct e1000_buffer *buffer_info;
2712 u16 ipcse = 0, tucse, mss;
2713 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2716 if (skb_is_gso(skb)) {
2717 if (skb_header_cloned(skb)) {
2718 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2723 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2724 mss = skb_shinfo(skb)->gso_size;
2725 if (skb->protocol == htons(ETH_P_IP)) {
2726 struct iphdr *iph = ip_hdr(skb);
2729 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2733 cmd_length = E1000_TXD_CMD_IP;
2734 ipcse = skb_transport_offset(skb) - 1;
2735 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2736 ipv6_hdr(skb)->payload_len = 0;
2737 tcp_hdr(skb)->check =
2738 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2739 &ipv6_hdr(skb)->daddr,
2743 ipcss = skb_network_offset(skb);
2744 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2745 tucss = skb_transport_offset(skb);
2746 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2749 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2750 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2752 i = tx_ring->next_to_use;
2753 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2754 buffer_info = &tx_ring->buffer_info[i];
2756 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2757 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2758 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2759 context_desc->upper_setup.tcp_fields.tucss = tucss;
2760 context_desc->upper_setup.tcp_fields.tucso = tucso;
2761 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2762 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2763 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2764 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2766 buffer_info->time_stamp = jiffies;
2767 buffer_info->next_to_watch = i;
2769 if (++i == tx_ring->count) i = 0;
2770 tx_ring->next_to_use = i;
2777 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2778 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2780 struct e1000_context_desc *context_desc;
2781 struct e1000_buffer *buffer_info;
2784 u32 cmd_len = E1000_TXD_CMD_DEXT;
2786 if (skb->ip_summed != CHECKSUM_PARTIAL)
2789 switch (skb->protocol) {
2790 case cpu_to_be16(ETH_P_IP):
2791 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2792 cmd_len |= E1000_TXD_CMD_TCP;
2794 case cpu_to_be16(ETH_P_IPV6):
2795 /* XXX not handling all IPV6 headers */
2796 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2797 cmd_len |= E1000_TXD_CMD_TCP;
2800 if (unlikely(net_ratelimit()))
2801 e_warn(drv, "checksum_partial proto=%x!\n",
2806 css = skb_checksum_start_offset(skb);
2808 i = tx_ring->next_to_use;
2809 buffer_info = &tx_ring->buffer_info[i];
2810 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2812 context_desc->lower_setup.ip_config = 0;
2813 context_desc->upper_setup.tcp_fields.tucss = css;
2814 context_desc->upper_setup.tcp_fields.tucso =
2815 css + skb->csum_offset;
2816 context_desc->upper_setup.tcp_fields.tucse = 0;
2817 context_desc->tcp_seg_setup.data = 0;
2818 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2820 buffer_info->time_stamp = jiffies;
2821 buffer_info->next_to_watch = i;
2823 if (unlikely(++i == tx_ring->count)) i = 0;
2824 tx_ring->next_to_use = i;
2829 #define E1000_MAX_TXD_PWR 12
2830 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2832 static int e1000_tx_map(struct e1000_adapter *adapter,
2833 struct e1000_tx_ring *tx_ring,
2834 struct sk_buff *skb, unsigned int first,
2835 unsigned int max_per_txd, unsigned int nr_frags,
2838 struct e1000_hw *hw = &adapter->hw;
2839 struct pci_dev *pdev = adapter->pdev;
2840 struct e1000_buffer *buffer_info;
2841 unsigned int len = skb_headlen(skb);
2842 unsigned int offset = 0, size, count = 0, i;
2843 unsigned int f, bytecount, segs;
2845 i = tx_ring->next_to_use;
2848 buffer_info = &tx_ring->buffer_info[i];
2849 size = min(len, max_per_txd);
2850 /* Workaround for Controller erratum --
2851 * descriptor for non-tso packet in a linear SKB that follows a
2852 * tso gets written back prematurely before the data is fully
2853 * DMA'd to the controller */
2854 if (!skb->data_len && tx_ring->last_tx_tso &&
2856 tx_ring->last_tx_tso = false;
2860 /* Workaround for premature desc write-backs
2861 * in TSO mode. Append 4-byte sentinel desc */
2862 if (unlikely(mss && !nr_frags && size == len && size > 8))
2864 /* work-around for errata 10 and it applies
2865 * to all controllers in PCI-X mode
2866 * The fix is to make sure that the first descriptor of a
2867 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2869 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2870 (size > 2015) && count == 0))
2873 /* Workaround for potential 82544 hang in PCI-X. Avoid
2874 * terminating buffers within evenly-aligned dwords. */
2875 if (unlikely(adapter->pcix_82544 &&
2876 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2880 buffer_info->length = size;
2881 /* set time_stamp *before* dma to help avoid a possible race */
2882 buffer_info->time_stamp = jiffies;
2883 buffer_info->mapped_as_page = false;
2884 buffer_info->dma = dma_map_single(&pdev->dev,
2886 size, DMA_TO_DEVICE);
2887 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2889 buffer_info->next_to_watch = i;
2896 if (unlikely(i == tx_ring->count))
2901 for (f = 0; f < nr_frags; f++) {
2902 const struct skb_frag_struct *frag;
2904 frag = &skb_shinfo(skb)->frags[f];
2905 len = skb_frag_size(frag);
2909 unsigned long bufend;
2911 if (unlikely(i == tx_ring->count))
2914 buffer_info = &tx_ring->buffer_info[i];
2915 size = min(len, max_per_txd);
2916 /* Workaround for premature desc write-backs
2917 * in TSO mode. Append 4-byte sentinel desc */
2918 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2920 /* Workaround for potential 82544 hang in PCI-X.
2921 * Avoid terminating buffers within evenly-aligned
2923 bufend = (unsigned long)
2924 page_to_phys(skb_frag_page(frag));
2925 bufend += offset + size - 1;
2926 if (unlikely(adapter->pcix_82544 &&
2931 buffer_info->length = size;
2932 buffer_info->time_stamp = jiffies;
2933 buffer_info->mapped_as_page = true;
2934 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2935 offset, size, DMA_TO_DEVICE);
2936 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2938 buffer_info->next_to_watch = i;
2946 segs = skb_shinfo(skb)->gso_segs ?: 1;
2947 /* multiply data chunks by size of headers */
2948 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2950 tx_ring->buffer_info[i].skb = skb;
2951 tx_ring->buffer_info[i].segs = segs;
2952 tx_ring->buffer_info[i].bytecount = bytecount;
2953 tx_ring->buffer_info[first].next_to_watch = i;
2958 dev_err(&pdev->dev, "TX DMA map failed\n");
2959 buffer_info->dma = 0;
2965 i += tx_ring->count;
2967 buffer_info = &tx_ring->buffer_info[i];
2968 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2974 static void e1000_tx_queue(struct e1000_adapter *adapter,
2975 struct e1000_tx_ring *tx_ring, int tx_flags,
2978 struct e1000_hw *hw = &adapter->hw;
2979 struct e1000_tx_desc *tx_desc = NULL;
2980 struct e1000_buffer *buffer_info;
2981 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2984 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2985 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2987 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2989 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2990 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2993 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2994 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2995 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2998 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2999 txd_lower |= E1000_TXD_CMD_VLE;
3000 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3003 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3004 txd_lower &= ~(E1000_TXD_CMD_IFCS);
3006 i = tx_ring->next_to_use;
3009 buffer_info = &tx_ring->buffer_info[i];
3010 tx_desc = E1000_TX_DESC(*tx_ring, i);
3011 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3012 tx_desc->lower.data =
3013 cpu_to_le32(txd_lower | buffer_info->length);
3014 tx_desc->upper.data = cpu_to_le32(txd_upper);
3015 if (unlikely(++i == tx_ring->count)) i = 0;
3018 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3020 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3021 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3022 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3024 /* Force memory writes to complete before letting h/w
3025 * know there are new descriptors to fetch. (Only
3026 * applicable for weak-ordered memory model archs,
3027 * such as IA-64). */
3030 tx_ring->next_to_use = i;
3031 writel(i, hw->hw_addr + tx_ring->tdt);
3032 /* we need this if more than one processor can write to our tail
3033 * at a time, it syncronizes IO on IA64/Altix systems */
3038 * 82547 workaround to avoid controller hang in half-duplex environment.
3039 * The workaround is to avoid queuing a large packet that would span
3040 * the internal Tx FIFO ring boundary by notifying the stack to resend
3041 * the packet at a later time. This gives the Tx FIFO an opportunity to
3042 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3043 * to the beginning of the Tx FIFO.
3046 #define E1000_FIFO_HDR 0x10
3047 #define E1000_82547_PAD_LEN 0x3E0
3049 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3050 struct sk_buff *skb)
3052 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3053 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3055 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3057 if (adapter->link_duplex != HALF_DUPLEX)
3058 goto no_fifo_stall_required;
3060 if (atomic_read(&adapter->tx_fifo_stall))
3063 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3064 atomic_set(&adapter->tx_fifo_stall, 1);
3068 no_fifo_stall_required:
3069 adapter->tx_fifo_head += skb_fifo_len;
3070 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3071 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3075 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3077 struct e1000_adapter *adapter = netdev_priv(netdev);
3078 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3080 netif_stop_queue(netdev);
3081 /* Herbert's original patch had:
3082 * smp_mb__after_netif_stop_queue();
3083 * but since that doesn't exist yet, just open code it. */
3086 /* We need to check again in a case another CPU has just
3087 * made room available. */
3088 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3092 netif_start_queue(netdev);
3093 ++adapter->restart_queue;
3097 static int e1000_maybe_stop_tx(struct net_device *netdev,
3098 struct e1000_tx_ring *tx_ring, int size)
3100 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3102 return __e1000_maybe_stop_tx(netdev, size);
3105 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3106 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3107 struct net_device *netdev)
3109 struct e1000_adapter *adapter = netdev_priv(netdev);
3110 struct e1000_hw *hw = &adapter->hw;
3111 struct e1000_tx_ring *tx_ring;
3112 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3113 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3114 unsigned int tx_flags = 0;
3115 unsigned int len = skb_headlen(skb);
3116 unsigned int nr_frags;
3122 /* This goes back to the question of how to logically map a tx queue
3123 * to a flow. Right now, performance is impacted slightly negatively
3124 * if using multiple tx queues. If the stack breaks away from a
3125 * single qdisc implementation, we can look at this again. */
3126 tx_ring = adapter->tx_ring;
3128 if (unlikely(skb->len <= 0)) {
3129 dev_kfree_skb_any(skb);
3130 return NETDEV_TX_OK;
3133 mss = skb_shinfo(skb)->gso_size;
3134 /* The controller does a simple calculation to
3135 * make sure there is enough room in the FIFO before
3136 * initiating the DMA for each buffer. The calc is:
3137 * 4 = ceil(buffer len/mss). To make sure we don't
3138 * overrun the FIFO, adjust the max buffer len if mss
3142 max_per_txd = min(mss << 2, max_per_txd);
3143 max_txd_pwr = fls(max_per_txd) - 1;
3145 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3146 if (skb->data_len && hdr_len == len) {
3147 switch (hw->mac_type) {
3148 unsigned int pull_size;
3150 /* Make sure we have room to chop off 4 bytes,
3151 * and that the end alignment will work out to
3152 * this hardware's requirements
3153 * NOTE: this is a TSO only workaround
3154 * if end byte alignment not correct move us
3155 * into the next dword */
3156 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3159 pull_size = min((unsigned int)4, skb->data_len);
3160 if (!__pskb_pull_tail(skb, pull_size)) {
3161 e_err(drv, "__pskb_pull_tail "
3163 dev_kfree_skb_any(skb);
3164 return NETDEV_TX_OK;
3166 len = skb_headlen(skb);
3175 /* reserve a descriptor for the offload context */
3176 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3180 /* Controller Erratum workaround */
3181 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3184 count += TXD_USE_COUNT(len, max_txd_pwr);
3186 if (adapter->pcix_82544)
3189 /* work-around for errata 10 and it applies to all controllers
3190 * in PCI-X mode, so add one more descriptor to the count
3192 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3196 nr_frags = skb_shinfo(skb)->nr_frags;
3197 for (f = 0; f < nr_frags; f++)
3198 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3200 if (adapter->pcix_82544)
3203 /* need: count + 2 desc gap to keep tail from touching
3204 * head, otherwise try next time */
3205 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3206 return NETDEV_TX_BUSY;
3208 if (unlikely((hw->mac_type == e1000_82547) &&
3209 (e1000_82547_fifo_workaround(adapter, skb)))) {
3210 netif_stop_queue(netdev);
3211 if (!test_bit(__E1000_DOWN, &adapter->flags))
3212 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3213 return NETDEV_TX_BUSY;
3216 if (vlan_tx_tag_present(skb)) {
3217 tx_flags |= E1000_TX_FLAGS_VLAN;
3218 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3221 first = tx_ring->next_to_use;
3223 tso = e1000_tso(adapter, tx_ring, skb);
3225 dev_kfree_skb_any(skb);
3226 return NETDEV_TX_OK;
3230 if (likely(hw->mac_type != e1000_82544))
3231 tx_ring->last_tx_tso = true;
3232 tx_flags |= E1000_TX_FLAGS_TSO;
3233 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3234 tx_flags |= E1000_TX_FLAGS_CSUM;
3236 if (likely(skb->protocol == htons(ETH_P_IP)))
3237 tx_flags |= E1000_TX_FLAGS_IPV4;
3239 if (unlikely(skb->no_fcs))
3240 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3242 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3246 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3247 /* Make sure there is space in the ring for the next send. */
3248 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3251 dev_kfree_skb_any(skb);
3252 tx_ring->buffer_info[first].time_stamp = 0;
3253 tx_ring->next_to_use = first;
3256 return NETDEV_TX_OK;
3259 #define NUM_REGS 38 /* 1 based count */
3260 static void e1000_regdump(struct e1000_adapter *adapter)
3262 struct e1000_hw *hw = &adapter->hw;
3264 u32 *regs_buff = regs;
3267 static const char * const reg_name[] = {
3269 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3270 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3271 "TIDV", "TXDCTL", "TADV", "TARC0",
3272 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3274 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3275 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3276 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3279 regs_buff[0] = er32(CTRL);
3280 regs_buff[1] = er32(STATUS);
3282 regs_buff[2] = er32(RCTL);
3283 regs_buff[3] = er32(RDLEN);
3284 regs_buff[4] = er32(RDH);
3285 regs_buff[5] = er32(RDT);
3286 regs_buff[6] = er32(RDTR);
3288 regs_buff[7] = er32(TCTL);
3289 regs_buff[8] = er32(TDBAL);
3290 regs_buff[9] = er32(TDBAH);
3291 regs_buff[10] = er32(TDLEN);
3292 regs_buff[11] = er32(TDH);
3293 regs_buff[12] = er32(TDT);
3294 regs_buff[13] = er32(TIDV);
3295 regs_buff[14] = er32(TXDCTL);
3296 regs_buff[15] = er32(TADV);
3297 regs_buff[16] = er32(TARC0);
3299 regs_buff[17] = er32(TDBAL1);
3300 regs_buff[18] = er32(TDBAH1);
3301 regs_buff[19] = er32(TDLEN1);
3302 regs_buff[20] = er32(TDH1);
3303 regs_buff[21] = er32(TDT1);
3304 regs_buff[22] = er32(TXDCTL1);
3305 regs_buff[23] = er32(TARC1);
3306 regs_buff[24] = er32(CTRL_EXT);
3307 regs_buff[25] = er32(ERT);
3308 regs_buff[26] = er32(RDBAL0);
3309 regs_buff[27] = er32(RDBAH0);
3310 regs_buff[28] = er32(TDFH);
3311 regs_buff[29] = er32(TDFT);
3312 regs_buff[30] = er32(TDFHS);
3313 regs_buff[31] = er32(TDFTS);
3314 regs_buff[32] = er32(TDFPC);
3315 regs_buff[33] = er32(RDFH);
3316 regs_buff[34] = er32(RDFT);
3317 regs_buff[35] = er32(RDFHS);
3318 regs_buff[36] = er32(RDFTS);
3319 regs_buff[37] = er32(RDFPC);
3321 pr_info("Register dump\n");
3322 for (i = 0; i < NUM_REGS; i++)
3323 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3327 * e1000_dump: Print registers, tx ring and rx ring
3329 static void e1000_dump(struct e1000_adapter *adapter)
3331 /* this code doesn't handle multiple rings */
3332 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3333 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3336 if (!netif_msg_hw(adapter))
3339 /* Print Registers */
3340 e1000_regdump(adapter);
3345 pr_info("TX Desc ring0 dump\n");
3347 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3349 * Legacy Transmit Descriptor
3350 * +--------------------------------------------------------------+
3351 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3352 * +--------------------------------------------------------------+
3353 * 8 | Special | CSS | Status | CMD | CSO | Length |
3354 * +--------------------------------------------------------------+
3355 * 63 48 47 36 35 32 31 24 23 16 15 0
3357 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3358 * 63 48 47 40 39 32 31 16 15 8 7 0
3359 * +----------------------------------------------------------------+
3360 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3361 * +----------------------------------------------------------------+
3362 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3363 * +----------------------------------------------------------------+
3364 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3366 * Extended Data Descriptor (DTYP=0x1)
3367 * +----------------------------------------------------------------+
3368 * 0 | Buffer Address [63:0] |
3369 * +----------------------------------------------------------------+
3370 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3371 * +----------------------------------------------------------------+
3372 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3374 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3375 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3377 if (!netif_msg_tx_done(adapter))
3378 goto rx_ring_summary;
3380 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3381 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3382 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
3383 struct my_u { __le64 a; __le64 b; };
3384 struct my_u *u = (struct my_u *)tx_desc;
3387 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3389 else if (i == tx_ring->next_to_use)
3391 else if (i == tx_ring->next_to_clean)
3396 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3397 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3398 le64_to_cpu(u->a), le64_to_cpu(u->b),
3399 (u64)buffer_info->dma, buffer_info->length,
3400 buffer_info->next_to_watch,
3401 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3408 pr_info("\nRX Desc ring dump\n");
3410 /* Legacy Receive Descriptor Format
3412 * +-----------------------------------------------------+
3413 * | Buffer Address [63:0] |
3414 * +-----------------------------------------------------+
3415 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3416 * +-----------------------------------------------------+
3417 * 63 48 47 40 39 32 31 16 15 0
3419 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3421 if (!netif_msg_rx_status(adapter))
3424 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3425 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3426 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i];
3427 struct my_u { __le64 a; __le64 b; };
3428 struct my_u *u = (struct my_u *)rx_desc;
3431 if (i == rx_ring->next_to_use)
3433 else if (i == rx_ring->next_to_clean)
3438 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3439 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3440 (u64)buffer_info->dma, buffer_info->skb, type);
3443 /* dump the descriptor caches */
3445 pr_info("Rx descriptor cache in 64bit format\n");
3446 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3447 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3449 readl(adapter->hw.hw_addr + i+4),
3450 readl(adapter->hw.hw_addr + i),
3451 readl(adapter->hw.hw_addr + i+12),
3452 readl(adapter->hw.hw_addr + i+8));
3455 pr_info("Tx descriptor cache in 64bit format\n");
3456 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3457 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3459 readl(adapter->hw.hw_addr + i+4),
3460 readl(adapter->hw.hw_addr + i),
3461 readl(adapter->hw.hw_addr + i+12),
3462 readl(adapter->hw.hw_addr + i+8));
3469 * e1000_tx_timeout - Respond to a Tx Hang
3470 * @netdev: network interface device structure
3473 static void e1000_tx_timeout(struct net_device *netdev)
3475 struct e1000_adapter *adapter = netdev_priv(netdev);
3477 /* Do the reset outside of interrupt context */
3478 adapter->tx_timeout_count++;
3479 schedule_work(&adapter->reset_task);
3482 static void e1000_reset_task(struct work_struct *work)
3484 struct e1000_adapter *adapter =
3485 container_of(work, struct e1000_adapter, reset_task);
3487 if (test_bit(__E1000_DOWN, &adapter->flags))
3489 e_err(drv, "Reset adapter\n");
3490 e1000_reinit_safe(adapter);
3494 * e1000_get_stats - Get System Network Statistics
3495 * @netdev: network interface device structure
3497 * Returns the address of the device statistics structure.
3498 * The statistics are actually updated from the watchdog.
3501 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3503 /* only return the current stats */
3504 return &netdev->stats;
3508 * e1000_change_mtu - Change the Maximum Transfer Unit
3509 * @netdev: network interface device structure
3510 * @new_mtu: new value for maximum frame size
3512 * Returns 0 on success, negative on failure
3515 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3517 struct e1000_adapter *adapter = netdev_priv(netdev);
3518 struct e1000_hw *hw = &adapter->hw;
3519 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3521 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3522 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3523 e_err(probe, "Invalid MTU setting\n");
3527 /* Adapter-specific max frame size limits. */
3528 switch (hw->mac_type) {
3529 case e1000_undefined ... e1000_82542_rev2_1:
3530 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3531 e_err(probe, "Jumbo Frames not supported.\n");
3536 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3540 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3542 /* e1000_down has a dependency on max_frame_size */
3543 hw->max_frame_size = max_frame;
3544 if (netif_running(netdev))
3545 e1000_down(adapter);
3547 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3548 * means we reserve 2 more, this pushes us to allocate from the next
3550 * i.e. RXBUFFER_2048 --> size-4096 slab
3551 * however with the new *_jumbo_rx* routines, jumbo receives will use
3552 * fragmented skbs */
3554 if (max_frame <= E1000_RXBUFFER_2048)
3555 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3557 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3558 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3559 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3560 adapter->rx_buffer_len = PAGE_SIZE;
3563 /* adjust allocation if LPE protects us, and we aren't using SBP */
3564 if (!hw->tbi_compatibility_on &&
3565 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3566 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3567 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3569 pr_info("%s changing MTU from %d to %d\n",
3570 netdev->name, netdev->mtu, new_mtu);
3571 netdev->mtu = new_mtu;
3573 if (netif_running(netdev))
3576 e1000_reset(adapter);
3578 clear_bit(__E1000_RESETTING, &adapter->flags);
3584 * e1000_update_stats - Update the board statistics counters
3585 * @adapter: board private structure
3588 void e1000_update_stats(struct e1000_adapter *adapter)
3590 struct net_device *netdev = adapter->netdev;
3591 struct e1000_hw *hw = &adapter->hw;
3592 struct pci_dev *pdev = adapter->pdev;
3593 unsigned long flags;
3596 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3599 * Prevent stats update while adapter is being reset, or if the pci
3600 * connection is down.
3602 if (adapter->link_speed == 0)
3604 if (pci_channel_offline(pdev))
3607 spin_lock_irqsave(&adapter->stats_lock, flags);
3609 /* these counters are modified from e1000_tbi_adjust_stats,
3610 * called from the interrupt context, so they must only
3611 * be written while holding adapter->stats_lock
3614 adapter->stats.crcerrs += er32(CRCERRS);
3615 adapter->stats.gprc += er32(GPRC);
3616 adapter->stats.gorcl += er32(GORCL);
3617 adapter->stats.gorch += er32(GORCH);
3618 adapter->stats.bprc += er32(BPRC);
3619 adapter->stats.mprc += er32(MPRC);
3620 adapter->stats.roc += er32(ROC);
3622 adapter->stats.prc64 += er32(PRC64);
3623 adapter->stats.prc127 += er32(PRC127);
3624 adapter->stats.prc255 += er32(PRC255);
3625 adapter->stats.prc511 += er32(PRC511);
3626 adapter->stats.prc1023 += er32(PRC1023);
3627 adapter->stats.prc1522 += er32(PRC1522);
3629 adapter->stats.symerrs += er32(SYMERRS);
3630 adapter->stats.mpc += er32(MPC);
3631 adapter->stats.scc += er32(SCC);
3632 adapter->stats.ecol += er32(ECOL);
3633 adapter->stats.mcc += er32(MCC);
3634 adapter->stats.latecol += er32(LATECOL);
3635 adapter->stats.dc += er32(DC);
3636 adapter->stats.sec += er32(SEC);
3637 adapter->stats.rlec += er32(RLEC);
3638 adapter->stats.xonrxc += er32(XONRXC);
3639 adapter->stats.xontxc += er32(XONTXC);
3640 adapter->stats.xoffrxc += er32(XOFFRXC);
3641 adapter->stats.xofftxc += er32(XOFFTXC);
3642 adapter->stats.fcruc += er32(FCRUC);
3643 adapter->stats.gptc += er32(GPTC);
3644 adapter->stats.gotcl += er32(GOTCL);
3645 adapter->stats.gotch += er32(GOTCH);
3646 adapter->stats.rnbc += er32(RNBC);
3647 adapter->stats.ruc += er32(RUC);
3648 adapter->stats.rfc += er32(RFC);
3649 adapter->stats.rjc += er32(RJC);
3650 adapter->stats.torl += er32(TORL);
3651 adapter->stats.torh += er32(TORH);
3652 adapter->stats.totl += er32(TOTL);
3653 adapter->stats.toth += er32(TOTH);
3654 adapter->stats.tpr += er32(TPR);
3656 adapter->stats.ptc64 += er32(PTC64);
3657 adapter->stats.ptc127 += er32(PTC127);
3658 adapter->stats.ptc255 += er32(PTC255);
3659 adapter->stats.ptc511 += er32(PTC511);
3660 adapter->stats.ptc1023 += er32(PTC1023);
3661 adapter->stats.ptc1522 += er32(PTC1522);
3663 adapter->stats.mptc += er32(MPTC);
3664 adapter->stats.bptc += er32(BPTC);
3666 /* used for adaptive IFS */
3668 hw->tx_packet_delta = er32(TPT);
3669 adapter->stats.tpt += hw->tx_packet_delta;
3670 hw->collision_delta = er32(COLC);
3671 adapter->stats.colc += hw->collision_delta;
3673 if (hw->mac_type >= e1000_82543) {
3674 adapter->stats.algnerrc += er32(ALGNERRC);
3675 adapter->stats.rxerrc += er32(RXERRC);
3676 adapter->stats.tncrs += er32(TNCRS);
3677 adapter->stats.cexterr += er32(CEXTERR);
3678 adapter->stats.tsctc += er32(TSCTC);
3679 adapter->stats.tsctfc += er32(TSCTFC);
3682 /* Fill out the OS statistics structure */
3683 netdev->stats.multicast = adapter->stats.mprc;
3684 netdev->stats.collisions = adapter->stats.colc;
3688 /* RLEC on some newer hardware can be incorrect so build
3689 * our own version based on RUC and ROC */
3690 netdev->stats.rx_errors = adapter->stats.rxerrc +
3691 adapter->stats.crcerrs + adapter->stats.algnerrc +
3692 adapter->stats.ruc + adapter->stats.roc +
3693 adapter->stats.cexterr;
3694 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3695 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3696 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3697 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3698 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3701 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3702 netdev->stats.tx_errors = adapter->stats.txerrc;
3703 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3704 netdev->stats.tx_window_errors = adapter->stats.latecol;
3705 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3706 if (hw->bad_tx_carr_stats_fd &&
3707 adapter->link_duplex == FULL_DUPLEX) {
3708 netdev->stats.tx_carrier_errors = 0;
3709 adapter->stats.tncrs = 0;
3712 /* Tx Dropped needs to be maintained elsewhere */
3715 if (hw->media_type == e1000_media_type_copper) {
3716 if ((adapter->link_speed == SPEED_1000) &&
3717 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3718 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3719 adapter->phy_stats.idle_errors += phy_tmp;
3722 if ((hw->mac_type <= e1000_82546) &&
3723 (hw->phy_type == e1000_phy_m88) &&
3724 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3725 adapter->phy_stats.receive_errors += phy_tmp;
3728 /* Management Stats */
3729 if (hw->has_smbus) {
3730 adapter->stats.mgptc += er32(MGTPTC);
3731 adapter->stats.mgprc += er32(MGTPRC);
3732 adapter->stats.mgpdc += er32(MGTPDC);
3735 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3739 * e1000_intr - Interrupt Handler
3740 * @irq: interrupt number
3741 * @data: pointer to a network interface device structure
3744 static irqreturn_t e1000_intr(int irq, void *data)
3746 struct net_device *netdev = data;
3747 struct e1000_adapter *adapter = netdev_priv(netdev);
3748 struct e1000_hw *hw = &adapter->hw;
3749 u32 icr = er32(ICR);
3751 if (unlikely((!icr)))
3752 return IRQ_NONE; /* Not our interrupt */
3755 * we might have caused the interrupt, but the above
3756 * read cleared it, and just in case the driver is
3757 * down there is nothing to do so return handled
3759 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3762 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3763 hw->get_link_status = 1;
3764 /* guard against interrupt when we're going down */
3765 if (!test_bit(__E1000_DOWN, &adapter->flags))
3766 schedule_delayed_work(&adapter->watchdog_task, 1);
3769 /* disable interrupts, without the synchronize_irq bit */
3771 E1000_WRITE_FLUSH();
3773 if (likely(napi_schedule_prep(&adapter->napi))) {
3774 adapter->total_tx_bytes = 0;
3775 adapter->total_tx_packets = 0;
3776 adapter->total_rx_bytes = 0;
3777 adapter->total_rx_packets = 0;
3778 __napi_schedule(&adapter->napi);
3780 /* this really should not happen! if it does it is basically a
3781 * bug, but not a hard error, so enable ints and continue */
3782 if (!test_bit(__E1000_DOWN, &adapter->flags))
3783 e1000_irq_enable(adapter);
3790 * e1000_clean - NAPI Rx polling callback
3791 * @adapter: board private structure
3793 static int e1000_clean(struct napi_struct *napi, int budget)
3795 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3796 int tx_clean_complete = 0, work_done = 0;
3798 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3800 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3802 if (!tx_clean_complete)
3805 /* If budget not fully consumed, exit the polling mode */
3806 if (work_done < budget) {
3807 if (likely(adapter->itr_setting & 3))
3808 e1000_set_itr(adapter);
3809 napi_complete(napi);
3810 if (!test_bit(__E1000_DOWN, &adapter->flags))
3811 e1000_irq_enable(adapter);
3818 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3819 * @adapter: board private structure
3821 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3822 struct e1000_tx_ring *tx_ring)
3824 struct e1000_hw *hw = &adapter->hw;
3825 struct net_device *netdev = adapter->netdev;
3826 struct e1000_tx_desc *tx_desc, *eop_desc;
3827 struct e1000_buffer *buffer_info;
3828 unsigned int i, eop;
3829 unsigned int count = 0;
3830 unsigned int total_tx_bytes=0, total_tx_packets=0;
3832 i = tx_ring->next_to_clean;
3833 eop = tx_ring->buffer_info[i].next_to_watch;
3834 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3836 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3837 (count < tx_ring->count)) {
3838 bool cleaned = false;
3839 rmb(); /* read buffer_info after eop_desc */
3840 for ( ; !cleaned; count++) {
3841 tx_desc = E1000_TX_DESC(*tx_ring, i);
3842 buffer_info = &tx_ring->buffer_info[i];
3843 cleaned = (i == eop);
3846 total_tx_packets += buffer_info->segs;
3847 total_tx_bytes += buffer_info->bytecount;
3849 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3850 tx_desc->upper.data = 0;
3852 if (unlikely(++i == tx_ring->count)) i = 0;
3855 eop = tx_ring->buffer_info[i].next_to_watch;
3856 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3859 tx_ring->next_to_clean = i;
3861 #define TX_WAKE_THRESHOLD 32
3862 if (unlikely(count && netif_carrier_ok(netdev) &&
3863 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3864 /* Make sure that anybody stopping the queue after this
3865 * sees the new next_to_clean.
3869 if (netif_queue_stopped(netdev) &&
3870 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3871 netif_wake_queue(netdev);
3872 ++adapter->restart_queue;
3876 if (adapter->detect_tx_hung) {
3877 /* Detect a transmit hang in hardware, this serializes the
3878 * check with the clearing of time_stamp and movement of i */
3879 adapter->detect_tx_hung = false;
3880 if (tx_ring->buffer_info[eop].time_stamp &&
3881 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3882 (adapter->tx_timeout_factor * HZ)) &&
3883 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3885 /* detected Tx unit hang */
3886 e_err(drv, "Detected Tx Unit Hang\n"
3890 " next_to_use <%x>\n"
3891 " next_to_clean <%x>\n"
3892 "buffer_info[next_to_clean]\n"
3893 " time_stamp <%lx>\n"
3894 " next_to_watch <%x>\n"
3896 " next_to_watch.status <%x>\n",
3897 (unsigned long)((tx_ring - adapter->tx_ring) /
3898 sizeof(struct e1000_tx_ring)),
3899 readl(hw->hw_addr + tx_ring->tdh),
3900 readl(hw->hw_addr + tx_ring->tdt),
3901 tx_ring->next_to_use,
3902 tx_ring->next_to_clean,
3903 tx_ring->buffer_info[eop].time_stamp,
3906 eop_desc->upper.fields.status);
3907 e1000_dump(adapter);
3908 netif_stop_queue(netdev);
3911 adapter->total_tx_bytes += total_tx_bytes;
3912 adapter->total_tx_packets += total_tx_packets;
3913 netdev->stats.tx_bytes += total_tx_bytes;
3914 netdev->stats.tx_packets += total_tx_packets;
3915 return count < tx_ring->count;
3919 * e1000_rx_checksum - Receive Checksum Offload for 82543
3920 * @adapter: board private structure
3921 * @status_err: receive descriptor status and error fields
3922 * @csum: receive descriptor csum field
3923 * @sk_buff: socket buffer with received data
3926 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3927 u32 csum, struct sk_buff *skb)
3929 struct e1000_hw *hw = &adapter->hw;
3930 u16 status = (u16)status_err;
3931 u8 errors = (u8)(status_err >> 24);
3933 skb_checksum_none_assert(skb);
3935 /* 82543 or newer only */
3936 if (unlikely(hw->mac_type < e1000_82543)) return;
3937 /* Ignore Checksum bit is set */
3938 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3939 /* TCP/UDP checksum error bit is set */
3940 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3941 /* let the stack verify checksum errors */
3942 adapter->hw_csum_err++;
3945 /* TCP/UDP Checksum has not been calculated */
3946 if (!(status & E1000_RXD_STAT_TCPCS))
3949 /* It must be a TCP or UDP packet with a valid checksum */
3950 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3951 /* TCP checksum is good */
3952 skb->ip_summed = CHECKSUM_UNNECESSARY;
3954 adapter->hw_csum_good++;
3958 * e1000_consume_page - helper function
3960 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3965 skb->data_len += length;
3966 skb->truesize += PAGE_SIZE;
3970 * e1000_receive_skb - helper function to handle rx indications
3971 * @adapter: board private structure
3972 * @status: descriptor status field as written by hardware
3973 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3974 * @skb: pointer to sk_buff to be indicated to stack
3976 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3977 __le16 vlan, struct sk_buff *skb)
3979 skb->protocol = eth_type_trans(skb, adapter->netdev);
3981 if (status & E1000_RXD_STAT_VP) {
3982 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
3984 __vlan_hwaccel_put_tag(skb, vid);
3986 napi_gro_receive(&adapter->napi, skb);
3990 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3991 * @adapter: board private structure
3992 * @rx_ring: ring to clean
3993 * @work_done: amount of napi work completed this call
3994 * @work_to_do: max amount of work allowed for this call to do
3996 * the return value indicates whether actual cleaning was done, there
3997 * is no guarantee that everything was cleaned
3999 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
4000 struct e1000_rx_ring *rx_ring,
4001 int *work_done, int work_to_do)
4003 struct e1000_hw *hw = &adapter->hw;
4004 struct net_device *netdev = adapter->netdev;
4005 struct pci_dev *pdev = adapter->pdev;
4006 struct e1000_rx_desc *rx_desc, *next_rxd;
4007 struct e1000_buffer *buffer_info, *next_buffer;
4008 unsigned long irq_flags;
4011 int cleaned_count = 0;
4012 bool cleaned = false;
4013 unsigned int total_rx_bytes=0, total_rx_packets=0;
4015 i = rx_ring->next_to_clean;
4016 rx_desc = E1000_RX_DESC(*rx_ring, i);
4017 buffer_info = &rx_ring->buffer_info[i];
4019 while (rx_desc->status & E1000_RXD_STAT_DD) {
4020 struct sk_buff *skb;
4023 if (*work_done >= work_to_do)
4026 rmb(); /* read descriptor and rx_buffer_info after status DD */
4028 status = rx_desc->status;
4029 skb = buffer_info->skb;
4030 buffer_info->skb = NULL;
4032 if (++i == rx_ring->count) i = 0;
4033 next_rxd = E1000_RX_DESC(*rx_ring, i);
4036 next_buffer = &rx_ring->buffer_info[i];
4040 dma_unmap_page(&pdev->dev, buffer_info->dma,
4041 buffer_info->length, DMA_FROM_DEVICE);
4042 buffer_info->dma = 0;
4044 length = le16_to_cpu(rx_desc->length);
4046 /* errors is only valid for DD + EOP descriptors */
4047 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4048 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4049 u8 last_byte = *(skb->data + length - 1);
4050 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4052 spin_lock_irqsave(&adapter->stats_lock,
4054 e1000_tbi_adjust_stats(hw, &adapter->stats,
4056 spin_unlock_irqrestore(&adapter->stats_lock,
4060 /* recycle both page and skb */
4061 buffer_info->skb = skb;
4062 /* an error means any chain goes out the window
4064 if (rx_ring->rx_skb_top)
4065 dev_kfree_skb(rx_ring->rx_skb_top);
4066 rx_ring->rx_skb_top = NULL;
4071 #define rxtop rx_ring->rx_skb_top
4072 if (!(status & E1000_RXD_STAT_EOP)) {
4073 /* this descriptor is only the beginning (or middle) */
4075 /* this is the beginning of a chain */
4077 skb_fill_page_desc(rxtop, 0, buffer_info->page,
4080 /* this is the middle of a chain */
4081 skb_fill_page_desc(rxtop,
4082 skb_shinfo(rxtop)->nr_frags,
4083 buffer_info->page, 0, length);
4084 /* re-use the skb, only consumed the page */
4085 buffer_info->skb = skb;
4087 e1000_consume_page(buffer_info, rxtop, length);
4091 /* end of the chain */
4092 skb_fill_page_desc(rxtop,
4093 skb_shinfo(rxtop)->nr_frags,
4094 buffer_info->page, 0, length);
4095 /* re-use the current skb, we only consumed the
4097 buffer_info->skb = skb;
4100 e1000_consume_page(buffer_info, skb, length);
4102 /* no chain, got EOP, this buf is the packet
4103 * copybreak to save the put_page/alloc_page */
4104 if (length <= copybreak &&
4105 skb_tailroom(skb) >= length) {
4107 vaddr = kmap_atomic(buffer_info->page);
4108 memcpy(skb_tail_pointer(skb), vaddr, length);
4109 kunmap_atomic(vaddr);
4110 /* re-use the page, so don't erase
4111 * buffer_info->page */
4112 skb_put(skb, length);
4114 skb_fill_page_desc(skb, 0,
4115 buffer_info->page, 0,
4117 e1000_consume_page(buffer_info, skb,
4123 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4124 e1000_rx_checksum(adapter,
4126 ((u32)(rx_desc->errors) << 24),
4127 le16_to_cpu(rx_desc->csum), skb);
4129 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4130 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4131 pskb_trim(skb, skb->len - 4);
4134 /* eth type trans needs skb->data to point to something */
4135 if (!pskb_may_pull(skb, ETH_HLEN)) {
4136 e_err(drv, "pskb_may_pull failed.\n");
4141 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4144 rx_desc->status = 0;
4146 /* return some buffers to hardware, one at a time is too slow */
4147 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4148 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4152 /* use prefetched values */
4154 buffer_info = next_buffer;
4156 rx_ring->next_to_clean = i;
4158 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4160 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4162 adapter->total_rx_packets += total_rx_packets;
4163 adapter->total_rx_bytes += total_rx_bytes;
4164 netdev->stats.rx_bytes += total_rx_bytes;
4165 netdev->stats.rx_packets += total_rx_packets;
4170 * this should improve performance for small packets with large amounts
4171 * of reassembly being done in the stack
4173 static void e1000_check_copybreak(struct net_device *netdev,
4174 struct e1000_buffer *buffer_info,
4175 u32 length, struct sk_buff **skb)
4177 struct sk_buff *new_skb;
4179 if (length > copybreak)
4182 new_skb = netdev_alloc_skb_ip_align(netdev, length);
4186 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
4187 (*skb)->data - NET_IP_ALIGN,
4188 length + NET_IP_ALIGN);
4189 /* save the skb in buffer_info as good */
4190 buffer_info->skb = *skb;
4195 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4196 * @adapter: board private structure
4197 * @rx_ring: ring to clean
4198 * @work_done: amount of napi work completed this call
4199 * @work_to_do: max amount of work allowed for this call to do
4201 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4202 struct e1000_rx_ring *rx_ring,
4203 int *work_done, int work_to_do)
4205 struct e1000_hw *hw = &adapter->hw;
4206 struct net_device *netdev = adapter->netdev;
4207 struct pci_dev *pdev = adapter->pdev;
4208 struct e1000_rx_desc *rx_desc, *next_rxd;
4209 struct e1000_buffer *buffer_info, *next_buffer;
4210 unsigned long flags;
4213 int cleaned_count = 0;
4214 bool cleaned = false;
4215 unsigned int total_rx_bytes=0, total_rx_packets=0;
4217 i = rx_ring->next_to_clean;
4218 rx_desc = E1000_RX_DESC(*rx_ring, i);
4219 buffer_info = &rx_ring->buffer_info[i];
4221 while (rx_desc->status & E1000_RXD_STAT_DD) {
4222 struct sk_buff *skb;
4225 if (*work_done >= work_to_do)
4228 rmb(); /* read descriptor and rx_buffer_info after status DD */
4230 status = rx_desc->status;
4231 skb = buffer_info->skb;
4232 buffer_info->skb = NULL;
4234 prefetch(skb->data - NET_IP_ALIGN);
4236 if (++i == rx_ring->count) i = 0;
4237 next_rxd = E1000_RX_DESC(*rx_ring, i);
4240 next_buffer = &rx_ring->buffer_info[i];
4244 dma_unmap_single(&pdev->dev, buffer_info->dma,
4245 buffer_info->length, DMA_FROM_DEVICE);
4246 buffer_info->dma = 0;
4248 length = le16_to_cpu(rx_desc->length);
4249 /* !EOP means multiple descriptors were used to store a single
4250 * packet, if thats the case we need to toss it. In fact, we
4251 * to toss every packet with the EOP bit clear and the next
4252 * frame that _does_ have the EOP bit set, as it is by
4253 * definition only a frame fragment
4255 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4256 adapter->discarding = true;
4258 if (adapter->discarding) {
4259 /* All receives must fit into a single buffer */
4260 e_dbg("Receive packet consumed multiple buffers\n");
4262 buffer_info->skb = skb;
4263 if (status & E1000_RXD_STAT_EOP)
4264 adapter->discarding = false;
4268 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4269 u8 last_byte = *(skb->data + length - 1);
4270 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4272 spin_lock_irqsave(&adapter->stats_lock, flags);
4273 e1000_tbi_adjust_stats(hw, &adapter->stats,
4275 spin_unlock_irqrestore(&adapter->stats_lock,
4280 buffer_info->skb = skb;
4285 total_rx_bytes += (length - 4); /* don't count FCS */
4288 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4289 /* adjust length to remove Ethernet CRC, this must be
4290 * done after the TBI_ACCEPT workaround above
4294 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4296 skb_put(skb, length);
4298 /* Receive Checksum Offload */
4299 e1000_rx_checksum(adapter,
4301 ((u32)(rx_desc->errors) << 24),
4302 le16_to_cpu(rx_desc->csum), skb);
4304 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4307 rx_desc->status = 0;
4309 /* return some buffers to hardware, one at a time is too slow */
4310 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4311 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4315 /* use prefetched values */
4317 buffer_info = next_buffer;
4319 rx_ring->next_to_clean = i;
4321 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4323 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4325 adapter->total_rx_packets += total_rx_packets;
4326 adapter->total_rx_bytes += total_rx_bytes;
4327 netdev->stats.rx_bytes += total_rx_bytes;
4328 netdev->stats.rx_packets += total_rx_packets;
4333 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4334 * @adapter: address of board private structure
4335 * @rx_ring: pointer to receive ring structure
4336 * @cleaned_count: number of buffers to allocate this pass
4340 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4341 struct e1000_rx_ring *rx_ring, int cleaned_count)
4343 struct net_device *netdev = adapter->netdev;
4344 struct pci_dev *pdev = adapter->pdev;
4345 struct e1000_rx_desc *rx_desc;
4346 struct e1000_buffer *buffer_info;
4347 struct sk_buff *skb;
4349 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4351 i = rx_ring->next_to_use;
4352 buffer_info = &rx_ring->buffer_info[i];
4354 while (cleaned_count--) {
4355 skb = buffer_info->skb;
4361 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4362 if (unlikely(!skb)) {
4363 /* Better luck next round */
4364 adapter->alloc_rx_buff_failed++;
4368 /* Fix for errata 23, can't cross 64kB boundary */
4369 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4370 struct sk_buff *oldskb = skb;
4371 e_err(rx_err, "skb align check failed: %u bytes at "
4372 "%p\n", bufsz, skb->data);
4373 /* Try again, without freeing the previous */
4374 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4375 /* Failed allocation, critical failure */
4377 dev_kfree_skb(oldskb);
4378 adapter->alloc_rx_buff_failed++;
4382 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4385 dev_kfree_skb(oldskb);
4386 break; /* while (cleaned_count--) */
4389 /* Use new allocation */
4390 dev_kfree_skb(oldskb);
4392 buffer_info->skb = skb;
4393 buffer_info->length = adapter->rx_buffer_len;
4395 /* allocate a new page if necessary */
4396 if (!buffer_info->page) {
4397 buffer_info->page = alloc_page(GFP_ATOMIC);
4398 if (unlikely(!buffer_info->page)) {
4399 adapter->alloc_rx_buff_failed++;
4404 if (!buffer_info->dma) {
4405 buffer_info->dma = dma_map_page(&pdev->dev,
4406 buffer_info->page, 0,
4407 buffer_info->length,
4409 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4410 put_page(buffer_info->page);
4412 buffer_info->page = NULL;
4413 buffer_info->skb = NULL;
4414 buffer_info->dma = 0;
4415 adapter->alloc_rx_buff_failed++;
4416 break; /* while !buffer_info->skb */
4420 rx_desc = E1000_RX_DESC(*rx_ring, i);
4421 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4423 if (unlikely(++i == rx_ring->count))
4425 buffer_info = &rx_ring->buffer_info[i];
4428 if (likely(rx_ring->next_to_use != i)) {
4429 rx_ring->next_to_use = i;
4430 if (unlikely(i-- == 0))
4431 i = (rx_ring->count - 1);
4433 /* Force memory writes to complete before letting h/w
4434 * know there are new descriptors to fetch. (Only
4435 * applicable for weak-ordered memory model archs,
4436 * such as IA-64). */
4438 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4443 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4444 * @adapter: address of board private structure
4447 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4448 struct e1000_rx_ring *rx_ring,
4451 struct e1000_hw *hw = &adapter->hw;
4452 struct net_device *netdev = adapter->netdev;
4453 struct pci_dev *pdev = adapter->pdev;
4454 struct e1000_rx_desc *rx_desc;
4455 struct e1000_buffer *buffer_info;
4456 struct sk_buff *skb;
4458 unsigned int bufsz = adapter->rx_buffer_len;
4460 i = rx_ring->next_to_use;
4461 buffer_info = &rx_ring->buffer_info[i];
4463 while (cleaned_count--) {
4464 skb = buffer_info->skb;
4470 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4471 if (unlikely(!skb)) {
4472 /* Better luck next round */
4473 adapter->alloc_rx_buff_failed++;
4477 /* Fix for errata 23, can't cross 64kB boundary */
4478 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4479 struct sk_buff *oldskb = skb;
4480 e_err(rx_err, "skb align check failed: %u bytes at "
4481 "%p\n", bufsz, skb->data);
4482 /* Try again, without freeing the previous */
4483 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4484 /* Failed allocation, critical failure */
4486 dev_kfree_skb(oldskb);
4487 adapter->alloc_rx_buff_failed++;
4491 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4494 dev_kfree_skb(oldskb);
4495 adapter->alloc_rx_buff_failed++;
4496 break; /* while !buffer_info->skb */
4499 /* Use new allocation */
4500 dev_kfree_skb(oldskb);
4502 buffer_info->skb = skb;
4503 buffer_info->length = adapter->rx_buffer_len;
4505 buffer_info->dma = dma_map_single(&pdev->dev,
4507 buffer_info->length,
4509 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4511 buffer_info->skb = NULL;
4512 buffer_info->dma = 0;
4513 adapter->alloc_rx_buff_failed++;
4514 break; /* while !buffer_info->skb */
4518 * XXX if it was allocated cleanly it will never map to a
4522 /* Fix for errata 23, can't cross 64kB boundary */
4523 if (!e1000_check_64k_bound(adapter,
4524 (void *)(unsigned long)buffer_info->dma,
4525 adapter->rx_buffer_len)) {
4526 e_err(rx_err, "dma align check failed: %u bytes at "
4527 "%p\n", adapter->rx_buffer_len,
4528 (void *)(unsigned long)buffer_info->dma);
4530 buffer_info->skb = NULL;
4532 dma_unmap_single(&pdev->dev, buffer_info->dma,
4533 adapter->rx_buffer_len,
4535 buffer_info->dma = 0;
4537 adapter->alloc_rx_buff_failed++;
4538 break; /* while !buffer_info->skb */
4540 rx_desc = E1000_RX_DESC(*rx_ring, i);
4541 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4543 if (unlikely(++i == rx_ring->count))
4545 buffer_info = &rx_ring->buffer_info[i];
4548 if (likely(rx_ring->next_to_use != i)) {
4549 rx_ring->next_to_use = i;
4550 if (unlikely(i-- == 0))
4551 i = (rx_ring->count - 1);
4553 /* Force memory writes to complete before letting h/w
4554 * know there are new descriptors to fetch. (Only
4555 * applicable for weak-ordered memory model archs,
4556 * such as IA-64). */
4558 writel(i, hw->hw_addr + rx_ring->rdt);
4563 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4567 static void e1000_smartspeed(struct e1000_adapter *adapter)
4569 struct e1000_hw *hw = &adapter->hw;
4573 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4574 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4577 if (adapter->smartspeed == 0) {
4578 /* If Master/Slave config fault is asserted twice,
4579 * we assume back-to-back */
4580 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4581 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4582 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4583 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4584 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4585 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4586 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4587 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4589 adapter->smartspeed++;
4590 if (!e1000_phy_setup_autoneg(hw) &&
4591 !e1000_read_phy_reg(hw, PHY_CTRL,
4593 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4594 MII_CR_RESTART_AUTO_NEG);
4595 e1000_write_phy_reg(hw, PHY_CTRL,
4600 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4601 /* If still no link, perhaps using 2/3 pair cable */
4602 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4603 phy_ctrl |= CR_1000T_MS_ENABLE;
4604 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4605 if (!e1000_phy_setup_autoneg(hw) &&
4606 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4607 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4608 MII_CR_RESTART_AUTO_NEG);
4609 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4612 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4613 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4614 adapter->smartspeed = 0;
4624 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4630 return e1000_mii_ioctl(netdev, ifr, cmd);
4643 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4646 struct e1000_adapter *adapter = netdev_priv(netdev);
4647 struct e1000_hw *hw = &adapter->hw;
4648 struct mii_ioctl_data *data = if_mii(ifr);
4651 unsigned long flags;
4653 if (hw->media_type != e1000_media_type_copper)
4658 data->phy_id = hw->phy_addr;
4661 spin_lock_irqsave(&adapter->stats_lock, flags);
4662 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4664 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4667 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4670 if (data->reg_num & ~(0x1F))
4672 mii_reg = data->val_in;
4673 spin_lock_irqsave(&adapter->stats_lock, flags);
4674 if (e1000_write_phy_reg(hw, data->reg_num,
4676 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4679 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4680 if (hw->media_type == e1000_media_type_copper) {
4681 switch (data->reg_num) {
4683 if (mii_reg & MII_CR_POWER_DOWN)
4685 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4687 hw->autoneg_advertised = 0x2F;
4692 else if (mii_reg & 0x2000)
4696 retval = e1000_set_spd_dplx(
4704 if (netif_running(adapter->netdev))
4705 e1000_reinit_locked(adapter);
4707 e1000_reset(adapter);
4709 case M88E1000_PHY_SPEC_CTRL:
4710 case M88E1000_EXT_PHY_SPEC_CTRL:
4711 if (e1000_phy_reset(hw))
4716 switch (data->reg_num) {
4718 if (mii_reg & MII_CR_POWER_DOWN)
4720 if (netif_running(adapter->netdev))
4721 e1000_reinit_locked(adapter);
4723 e1000_reset(adapter);
4731 return E1000_SUCCESS;
4734 void e1000_pci_set_mwi(struct e1000_hw *hw)
4736 struct e1000_adapter *adapter = hw->back;
4737 int ret_val = pci_set_mwi(adapter->pdev);
4740 e_err(probe, "Error in setting MWI\n");
4743 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4745 struct e1000_adapter *adapter = hw->back;
4747 pci_clear_mwi(adapter->pdev);
4750 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4752 struct e1000_adapter *adapter = hw->back;
4753 return pcix_get_mmrbc(adapter->pdev);
4756 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4758 struct e1000_adapter *adapter = hw->back;
4759 pcix_set_mmrbc(adapter->pdev, mmrbc);
4762 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4767 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4771 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4776 static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4777 netdev_features_t features)
4779 struct e1000_hw *hw = &adapter->hw;
4783 if (features & NETIF_F_HW_VLAN_RX) {
4784 /* enable VLAN tag insert/strip */
4785 ctrl |= E1000_CTRL_VME;
4787 /* disable VLAN tag insert/strip */
4788 ctrl &= ~E1000_CTRL_VME;
4792 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4795 struct e1000_hw *hw = &adapter->hw;
4798 if (!test_bit(__E1000_DOWN, &adapter->flags))
4799 e1000_irq_disable(adapter);
4801 __e1000_vlan_mode(adapter, adapter->netdev->features);
4803 /* enable VLAN receive filtering */
4805 rctl &= ~E1000_RCTL_CFIEN;
4806 if (!(adapter->netdev->flags & IFF_PROMISC))
4807 rctl |= E1000_RCTL_VFE;
4809 e1000_update_mng_vlan(adapter);
4811 /* disable VLAN receive filtering */
4813 rctl &= ~E1000_RCTL_VFE;
4817 if (!test_bit(__E1000_DOWN, &adapter->flags))
4818 e1000_irq_enable(adapter);
4821 static void e1000_vlan_mode(struct net_device *netdev,
4822 netdev_features_t features)
4824 struct e1000_adapter *adapter = netdev_priv(netdev);
4826 if (!test_bit(__E1000_DOWN, &adapter->flags))
4827 e1000_irq_disable(adapter);
4829 __e1000_vlan_mode(adapter, features);
4831 if (!test_bit(__E1000_DOWN, &adapter->flags))
4832 e1000_irq_enable(adapter);
4835 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4837 struct e1000_adapter *adapter = netdev_priv(netdev);
4838 struct e1000_hw *hw = &adapter->hw;
4841 if ((hw->mng_cookie.status &
4842 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4843 (vid == adapter->mng_vlan_id))
4846 if (!e1000_vlan_used(adapter))
4847 e1000_vlan_filter_on_off(adapter, true);
4849 /* add VID to filter table */
4850 index = (vid >> 5) & 0x7F;
4851 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4852 vfta |= (1 << (vid & 0x1F));
4853 e1000_write_vfta(hw, index, vfta);
4855 set_bit(vid, adapter->active_vlans);
4860 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4862 struct e1000_adapter *adapter = netdev_priv(netdev);
4863 struct e1000_hw *hw = &adapter->hw;
4866 if (!test_bit(__E1000_DOWN, &adapter->flags))
4867 e1000_irq_disable(adapter);
4868 if (!test_bit(__E1000_DOWN, &adapter->flags))
4869 e1000_irq_enable(adapter);
4871 /* remove VID from filter table */
4872 index = (vid >> 5) & 0x7F;
4873 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4874 vfta &= ~(1 << (vid & 0x1F));
4875 e1000_write_vfta(hw, index, vfta);
4877 clear_bit(vid, adapter->active_vlans);
4879 if (!e1000_vlan_used(adapter))
4880 e1000_vlan_filter_on_off(adapter, false);
4885 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4889 if (!e1000_vlan_used(adapter))
4892 e1000_vlan_filter_on_off(adapter, true);
4893 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4894 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4897 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4899 struct e1000_hw *hw = &adapter->hw;
4903 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4904 * for the switch() below to work */
4905 if ((spd & 1) || (dplx & ~1))
4908 /* Fiber NICs only allow 1000 gbps Full duplex */
4909 if ((hw->media_type == e1000_media_type_fiber) &&
4910 spd != SPEED_1000 &&
4911 dplx != DUPLEX_FULL)
4914 switch (spd + dplx) {
4915 case SPEED_10 + DUPLEX_HALF:
4916 hw->forced_speed_duplex = e1000_10_half;
4918 case SPEED_10 + DUPLEX_FULL:
4919 hw->forced_speed_duplex = e1000_10_full;
4921 case SPEED_100 + DUPLEX_HALF:
4922 hw->forced_speed_duplex = e1000_100_half;
4924 case SPEED_100 + DUPLEX_FULL:
4925 hw->forced_speed_duplex = e1000_100_full;
4927 case SPEED_1000 + DUPLEX_FULL:
4929 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4931 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4938 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4942 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4944 struct net_device *netdev = pci_get_drvdata(pdev);
4945 struct e1000_adapter *adapter = netdev_priv(netdev);
4946 struct e1000_hw *hw = &adapter->hw;
4947 u32 ctrl, ctrl_ext, rctl, status;
4948 u32 wufc = adapter->wol;
4953 netif_device_detach(netdev);
4955 if (netif_running(netdev)) {
4956 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4957 e1000_down(adapter);
4961 retval = pci_save_state(pdev);
4966 status = er32(STATUS);
4967 if (status & E1000_STATUS_LU)
4968 wufc &= ~E1000_WUFC_LNKC;
4971 e1000_setup_rctl(adapter);
4972 e1000_set_rx_mode(netdev);
4976 /* turn on all-multi mode if wake on multicast is enabled */
4977 if (wufc & E1000_WUFC_MC)
4978 rctl |= E1000_RCTL_MPE;
4980 /* enable receives in the hardware */
4981 ew32(RCTL, rctl | E1000_RCTL_EN);
4983 if (hw->mac_type >= e1000_82540) {
4985 /* advertise wake from D3Cold */
4986 #define E1000_CTRL_ADVD3WUC 0x00100000
4987 /* phy power management enable */
4988 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4989 ctrl |= E1000_CTRL_ADVD3WUC |
4990 E1000_CTRL_EN_PHY_PWR_MGMT;
4994 if (hw->media_type == e1000_media_type_fiber ||
4995 hw->media_type == e1000_media_type_internal_serdes) {
4996 /* keep the laser running in D3 */
4997 ctrl_ext = er32(CTRL_EXT);
4998 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4999 ew32(CTRL_EXT, ctrl_ext);
5002 ew32(WUC, E1000_WUC_PME_EN);
5009 e1000_release_manageability(adapter);
5011 *enable_wake = !!wufc;
5013 /* make sure adapter isn't asleep if manageability is enabled */
5014 if (adapter->en_mng_pt)
5015 *enable_wake = true;
5017 if (netif_running(netdev))
5018 e1000_free_irq(adapter);
5020 pci_disable_device(pdev);
5026 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5031 retval = __e1000_shutdown(pdev, &wake);
5036 pci_prepare_to_sleep(pdev);
5038 pci_wake_from_d3(pdev, false);
5039 pci_set_power_state(pdev, PCI_D3hot);
5045 static int e1000_resume(struct pci_dev *pdev)
5047 struct net_device *netdev = pci_get_drvdata(pdev);
5048 struct e1000_adapter *adapter = netdev_priv(netdev);
5049 struct e1000_hw *hw = &adapter->hw;
5052 pci_set_power_state(pdev, PCI_D0);
5053 pci_restore_state(pdev);
5054 pci_save_state(pdev);
5056 if (adapter->need_ioport)
5057 err = pci_enable_device(pdev);
5059 err = pci_enable_device_mem(pdev);
5061 pr_err("Cannot enable PCI device from suspend\n");
5064 pci_set_master(pdev);
5066 pci_enable_wake(pdev, PCI_D3hot, 0);
5067 pci_enable_wake(pdev, PCI_D3cold, 0);
5069 if (netif_running(netdev)) {
5070 err = e1000_request_irq(adapter);
5075 e1000_power_up_phy(adapter);
5076 e1000_reset(adapter);
5079 e1000_init_manageability(adapter);
5081 if (netif_running(netdev))
5084 netif_device_attach(netdev);
5090 static void e1000_shutdown(struct pci_dev *pdev)
5094 __e1000_shutdown(pdev, &wake);
5096 if (system_state == SYSTEM_POWER_OFF) {
5097 pci_wake_from_d3(pdev, wake);
5098 pci_set_power_state(pdev, PCI_D3hot);
5102 #ifdef CONFIG_NET_POLL_CONTROLLER
5104 * Polling 'interrupt' - used by things like netconsole to send skbs
5105 * without having to re-enable interrupts. It's not called while
5106 * the interrupt routine is executing.
5108 static void e1000_netpoll(struct net_device *netdev)
5110 struct e1000_adapter *adapter = netdev_priv(netdev);
5112 disable_irq(adapter->pdev->irq);
5113 e1000_intr(adapter->pdev->irq, netdev);
5114 enable_irq(adapter->pdev->irq);
5119 * e1000_io_error_detected - called when PCI error is detected
5120 * @pdev: Pointer to PCI device
5121 * @state: The current pci connection state
5123 * This function is called after a PCI bus error affecting
5124 * this device has been detected.
5126 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5127 pci_channel_state_t state)
5129 struct net_device *netdev = pci_get_drvdata(pdev);
5130 struct e1000_adapter *adapter = netdev_priv(netdev);
5132 netif_device_detach(netdev);
5134 if (state == pci_channel_io_perm_failure)
5135 return PCI_ERS_RESULT_DISCONNECT;
5137 if (netif_running(netdev))
5138 e1000_down(adapter);
5139 pci_disable_device(pdev);
5141 /* Request a slot slot reset. */
5142 return PCI_ERS_RESULT_NEED_RESET;
5146 * e1000_io_slot_reset - called after the pci bus has been reset.
5147 * @pdev: Pointer to PCI device
5149 * Restart the card from scratch, as if from a cold-boot. Implementation
5150 * resembles the first-half of the e1000_resume routine.
5152 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5154 struct net_device *netdev = pci_get_drvdata(pdev);
5155 struct e1000_adapter *adapter = netdev_priv(netdev);
5156 struct e1000_hw *hw = &adapter->hw;
5159 if (adapter->need_ioport)
5160 err = pci_enable_device(pdev);
5162 err = pci_enable_device_mem(pdev);
5164 pr_err("Cannot re-enable PCI device after reset.\n");
5165 return PCI_ERS_RESULT_DISCONNECT;
5167 pci_set_master(pdev);
5169 pci_enable_wake(pdev, PCI_D3hot, 0);
5170 pci_enable_wake(pdev, PCI_D3cold, 0);
5172 e1000_reset(adapter);
5175 return PCI_ERS_RESULT_RECOVERED;
5179 * e1000_io_resume - called when traffic can start flowing again.
5180 * @pdev: Pointer to PCI device
5182 * This callback is called when the error recovery driver tells us that
5183 * its OK to resume normal operation. Implementation resembles the
5184 * second-half of the e1000_resume routine.
5186 static void e1000_io_resume(struct pci_dev *pdev)
5188 struct net_device *netdev = pci_get_drvdata(pdev);
5189 struct e1000_adapter *adapter = netdev_priv(netdev);
5191 e1000_init_manageability(adapter);
5193 if (netif_running(netdev)) {
5194 if (e1000_up(adapter)) {
5195 pr_info("can't bring device back up after reset\n");
5200 netif_device_attach(netdev);