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);
497 /* Only kill reset task if adapter is not resetting */
498 if (!test_bit(__E1000_RESETTING, &adapter->flags))
499 cancel_work_sync(&adapter->reset_task);
501 cancel_delayed_work_sync(&adapter->watchdog_task);
502 cancel_delayed_work_sync(&adapter->phy_info_task);
503 cancel_delayed_work_sync(&adapter->fifo_stall_task);
506 void e1000_down(struct e1000_adapter *adapter)
508 struct e1000_hw *hw = &adapter->hw;
509 struct net_device *netdev = adapter->netdev;
513 /* disable receives in the hardware */
515 ew32(RCTL, rctl & ~E1000_RCTL_EN);
516 /* flush and sleep below */
518 netif_tx_disable(netdev);
520 /* disable transmits in the hardware */
522 tctl &= ~E1000_TCTL_EN;
524 /* flush both disables and wait for them to finish */
528 napi_disable(&adapter->napi);
530 e1000_irq_disable(adapter);
533 * Setting DOWN must be after irq_disable to prevent
534 * a screaming interrupt. Setting DOWN also prevents
535 * tasks from rescheduling.
537 e1000_down_and_stop(adapter);
539 adapter->link_speed = 0;
540 adapter->link_duplex = 0;
541 netif_carrier_off(netdev);
543 e1000_reset(adapter);
544 e1000_clean_all_tx_rings(adapter);
545 e1000_clean_all_rx_rings(adapter);
548 static void e1000_reinit_safe(struct e1000_adapter *adapter)
550 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
552 mutex_lock(&adapter->mutex);
555 mutex_unlock(&adapter->mutex);
556 clear_bit(__E1000_RESETTING, &adapter->flags);
559 void e1000_reinit_locked(struct e1000_adapter *adapter)
561 /* if rtnl_lock is not held the call path is bogus */
563 WARN_ON(in_interrupt());
564 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
568 clear_bit(__E1000_RESETTING, &adapter->flags);
571 void e1000_reset(struct e1000_adapter *adapter)
573 struct e1000_hw *hw = &adapter->hw;
574 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
575 bool legacy_pba_adjust = false;
578 /* Repartition Pba for greater than 9k mtu
579 * To take effect CTRL.RST is required.
582 switch (hw->mac_type) {
583 case e1000_82542_rev2_0:
584 case e1000_82542_rev2_1:
589 case e1000_82541_rev_2:
590 legacy_pba_adjust = true;
594 case e1000_82545_rev_3:
597 case e1000_82546_rev_3:
601 case e1000_82547_rev_2:
602 legacy_pba_adjust = true;
605 case e1000_undefined:
610 if (legacy_pba_adjust) {
611 if (hw->max_frame_size > E1000_RXBUFFER_8192)
612 pba -= 8; /* allocate more FIFO for Tx */
614 if (hw->mac_type == e1000_82547) {
615 adapter->tx_fifo_head = 0;
616 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
617 adapter->tx_fifo_size =
618 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
619 atomic_set(&adapter->tx_fifo_stall, 0);
621 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
622 /* adjust PBA for jumbo frames */
625 /* To maintain wire speed transmits, the Tx FIFO should be
626 * large enough to accommodate two full transmit packets,
627 * rounded up to the next 1KB and expressed in KB. Likewise,
628 * the Rx FIFO should be large enough to accommodate at least
629 * one full receive packet and is similarly rounded up and
630 * expressed in KB. */
632 /* upper 16 bits has Tx packet buffer allocation size in KB */
633 tx_space = pba >> 16;
634 /* lower 16 bits has Rx packet buffer allocation size in KB */
637 * the tx fifo also stores 16 bytes of information about the tx
638 * but don't include ethernet FCS because hardware appends it
640 min_tx_space = (hw->max_frame_size +
641 sizeof(struct e1000_tx_desc) -
643 min_tx_space = ALIGN(min_tx_space, 1024);
645 /* software strips receive CRC, so leave room for it */
646 min_rx_space = hw->max_frame_size;
647 min_rx_space = ALIGN(min_rx_space, 1024);
650 /* If current Tx allocation is less than the min Tx FIFO size,
651 * and the min Tx FIFO size is less than the current Rx FIFO
652 * allocation, take space away from current Rx allocation */
653 if (tx_space < min_tx_space &&
654 ((min_tx_space - tx_space) < pba)) {
655 pba = pba - (min_tx_space - tx_space);
657 /* PCI/PCIx hardware has PBA alignment constraints */
658 switch (hw->mac_type) {
659 case e1000_82545 ... e1000_82546_rev_3:
660 pba &= ~(E1000_PBA_8K - 1);
666 /* if short on rx space, rx wins and must trump tx
667 * adjustment or use Early Receive if available */
668 if (pba < min_rx_space)
676 * flow control settings:
677 * The high water mark must be low enough to fit one full frame
678 * (or the size used for early receive) above it in the Rx FIFO.
679 * Set it to the lower of:
680 * - 90% of the Rx FIFO size, and
681 * - the full Rx FIFO size minus the early receive size (for parts
682 * with ERT support assuming ERT set to E1000_ERT_2048), or
683 * - the full Rx FIFO size minus one full frame
685 hwm = min(((pba << 10) * 9 / 10),
686 ((pba << 10) - hw->max_frame_size));
688 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
689 hw->fc_low_water = hw->fc_high_water - 8;
690 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
692 hw->fc = hw->original_fc;
694 /* Allow time for pending master requests to run */
696 if (hw->mac_type >= e1000_82544)
699 if (e1000_init_hw(hw))
700 e_dev_err("Hardware Error\n");
701 e1000_update_mng_vlan(adapter);
703 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
704 if (hw->mac_type >= e1000_82544 &&
706 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
707 u32 ctrl = er32(CTRL);
708 /* clear phy power management bit if we are in gig only mode,
709 * which if enabled will attempt negotiation to 100Mb, which
710 * can cause a loss of link at power off or driver unload */
711 ctrl &= ~E1000_CTRL_SWDPIN3;
715 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
716 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
718 e1000_reset_adaptive(hw);
719 e1000_phy_get_info(hw, &adapter->phy_info);
721 e1000_release_manageability(adapter);
725 * Dump the eeprom for users having checksum issues
727 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
729 struct net_device *netdev = adapter->netdev;
730 struct ethtool_eeprom eeprom;
731 const struct ethtool_ops *ops = netdev->ethtool_ops;
734 u16 csum_old, csum_new = 0;
736 eeprom.len = ops->get_eeprom_len(netdev);
739 data = kmalloc(eeprom.len, GFP_KERNEL);
743 ops->get_eeprom(netdev, &eeprom, data);
745 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
746 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
747 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
748 csum_new += data[i] + (data[i + 1] << 8);
749 csum_new = EEPROM_SUM - csum_new;
751 pr_err("/*********************/\n");
752 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
753 pr_err("Calculated : 0x%04x\n", csum_new);
755 pr_err("Offset Values\n");
756 pr_err("======== ======\n");
757 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
759 pr_err("Include this output when contacting your support provider.\n");
760 pr_err("This is not a software error! Something bad happened to\n");
761 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
762 pr_err("result in further problems, possibly loss of data,\n");
763 pr_err("corruption or system hangs!\n");
764 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
765 pr_err("which is invalid and requires you to set the proper MAC\n");
766 pr_err("address manually before continuing to enable this network\n");
767 pr_err("device. Please inspect the EEPROM dump and report the\n");
768 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
769 pr_err("/*********************/\n");
775 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
776 * @pdev: PCI device information struct
778 * Return true if an adapter needs ioport resources
780 static int e1000_is_need_ioport(struct pci_dev *pdev)
782 switch (pdev->device) {
783 case E1000_DEV_ID_82540EM:
784 case E1000_DEV_ID_82540EM_LOM:
785 case E1000_DEV_ID_82540EP:
786 case E1000_DEV_ID_82540EP_LOM:
787 case E1000_DEV_ID_82540EP_LP:
788 case E1000_DEV_ID_82541EI:
789 case E1000_DEV_ID_82541EI_MOBILE:
790 case E1000_DEV_ID_82541ER:
791 case E1000_DEV_ID_82541ER_LOM:
792 case E1000_DEV_ID_82541GI:
793 case E1000_DEV_ID_82541GI_LF:
794 case E1000_DEV_ID_82541GI_MOBILE:
795 case E1000_DEV_ID_82544EI_COPPER:
796 case E1000_DEV_ID_82544EI_FIBER:
797 case E1000_DEV_ID_82544GC_COPPER:
798 case E1000_DEV_ID_82544GC_LOM:
799 case E1000_DEV_ID_82545EM_COPPER:
800 case E1000_DEV_ID_82545EM_FIBER:
801 case E1000_DEV_ID_82546EB_COPPER:
802 case E1000_DEV_ID_82546EB_FIBER:
803 case E1000_DEV_ID_82546EB_QUAD_COPPER:
810 static netdev_features_t e1000_fix_features(struct net_device *netdev,
811 netdev_features_t features)
814 * Since there is no support for separate rx/tx vlan accel
815 * enable/disable make sure tx flag is always in same state as rx.
817 if (features & NETIF_F_HW_VLAN_RX)
818 features |= NETIF_F_HW_VLAN_TX;
820 features &= ~NETIF_F_HW_VLAN_TX;
825 static int e1000_set_features(struct net_device *netdev,
826 netdev_features_t features)
828 struct e1000_adapter *adapter = netdev_priv(netdev);
829 netdev_features_t changed = features ^ netdev->features;
831 if (changed & NETIF_F_HW_VLAN_RX)
832 e1000_vlan_mode(netdev, features);
834 if (!(changed & NETIF_F_RXCSUM))
837 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
839 if (netif_running(netdev))
840 e1000_reinit_locked(adapter);
842 e1000_reset(adapter);
847 static const struct net_device_ops e1000_netdev_ops = {
848 .ndo_open = e1000_open,
849 .ndo_stop = e1000_close,
850 .ndo_start_xmit = e1000_xmit_frame,
851 .ndo_get_stats = e1000_get_stats,
852 .ndo_set_rx_mode = e1000_set_rx_mode,
853 .ndo_set_mac_address = e1000_set_mac,
854 .ndo_tx_timeout = e1000_tx_timeout,
855 .ndo_change_mtu = e1000_change_mtu,
856 .ndo_do_ioctl = e1000_ioctl,
857 .ndo_validate_addr = eth_validate_addr,
858 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
859 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
860 #ifdef CONFIG_NET_POLL_CONTROLLER
861 .ndo_poll_controller = e1000_netpoll,
863 .ndo_fix_features = e1000_fix_features,
864 .ndo_set_features = e1000_set_features,
868 * e1000_init_hw_struct - initialize members of hw struct
869 * @adapter: board private struct
870 * @hw: structure used by e1000_hw.c
872 * Factors out initialization of the e1000_hw struct to its own function
873 * that can be called very early at init (just after struct allocation).
874 * Fields are initialized based on PCI device information and
875 * OS network device settings (MTU size).
876 * Returns negative error codes if MAC type setup fails.
878 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
881 struct pci_dev *pdev = adapter->pdev;
883 /* PCI config space info */
884 hw->vendor_id = pdev->vendor;
885 hw->device_id = pdev->device;
886 hw->subsystem_vendor_id = pdev->subsystem_vendor;
887 hw->subsystem_id = pdev->subsystem_device;
888 hw->revision_id = pdev->revision;
890 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
892 hw->max_frame_size = adapter->netdev->mtu +
893 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
894 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
896 /* identify the MAC */
897 if (e1000_set_mac_type(hw)) {
898 e_err(probe, "Unknown MAC Type\n");
902 switch (hw->mac_type) {
907 case e1000_82541_rev_2:
908 case e1000_82547_rev_2:
909 hw->phy_init_script = 1;
913 e1000_set_media_type(hw);
914 e1000_get_bus_info(hw);
916 hw->wait_autoneg_complete = false;
917 hw->tbi_compatibility_en = true;
918 hw->adaptive_ifs = true;
922 if (hw->media_type == e1000_media_type_copper) {
923 hw->mdix = AUTO_ALL_MODES;
924 hw->disable_polarity_correction = false;
925 hw->master_slave = E1000_MASTER_SLAVE;
932 * e1000_probe - Device Initialization Routine
933 * @pdev: PCI device information struct
934 * @ent: entry in e1000_pci_tbl
936 * Returns 0 on success, negative on failure
938 * e1000_probe initializes an adapter identified by a pci_dev structure.
939 * The OS initialization, configuring of the adapter private structure,
940 * and a hardware reset occur.
942 static int __devinit e1000_probe(struct pci_dev *pdev,
943 const struct pci_device_id *ent)
945 struct net_device *netdev;
946 struct e1000_adapter *adapter;
949 static int cards_found = 0;
950 static int global_quad_port_a = 0; /* global ksp3 port a indication */
951 int i, err, pci_using_dac;
954 u16 eeprom_apme_mask = E1000_EEPROM_APME;
955 int bars, need_ioport;
957 /* do not allocate ioport bars when not needed */
958 need_ioport = e1000_is_need_ioport(pdev);
960 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
961 err = pci_enable_device(pdev);
963 bars = pci_select_bars(pdev, IORESOURCE_MEM);
964 err = pci_enable_device_mem(pdev);
969 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
973 pci_set_master(pdev);
974 err = pci_save_state(pdev);
976 goto err_alloc_etherdev;
979 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
981 goto err_alloc_etherdev;
983 SET_NETDEV_DEV(netdev, &pdev->dev);
985 pci_set_drvdata(pdev, netdev);
986 adapter = netdev_priv(netdev);
987 adapter->netdev = netdev;
988 adapter->pdev = pdev;
989 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
990 adapter->bars = bars;
991 adapter->need_ioport = need_ioport;
997 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
1001 if (adapter->need_ioport) {
1002 for (i = BAR_1; i <= BAR_5; i++) {
1003 if (pci_resource_len(pdev, i) == 0)
1005 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1006 hw->io_base = pci_resource_start(pdev, i);
1012 /* make ready for any if (hw->...) below */
1013 err = e1000_init_hw_struct(adapter, hw);
1018 * there is a workaround being applied below that limits
1019 * 64-bit DMA addresses to 64-bit hardware. There are some
1020 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1023 if ((hw->bus_type == e1000_bus_type_pcix) &&
1024 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
1026 * according to DMA-API-HOWTO, coherent calls will always
1027 * succeed if the set call did
1029 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
1032 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1034 pr_err("No usable DMA config, aborting\n");
1037 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1040 netdev->netdev_ops = &e1000_netdev_ops;
1041 e1000_set_ethtool_ops(netdev);
1042 netdev->watchdog_timeo = 5 * HZ;
1043 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1045 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1047 adapter->bd_number = cards_found;
1049 /* setup the private structure */
1051 err = e1000_sw_init(adapter);
1056 if (hw->mac_type == e1000_ce4100) {
1057 hw->ce4100_gbe_mdio_base_virt =
1058 ioremap(pci_resource_start(pdev, BAR_1),
1059 pci_resource_len(pdev, BAR_1));
1061 if (!hw->ce4100_gbe_mdio_base_virt)
1062 goto err_mdio_ioremap;
1065 if (hw->mac_type >= e1000_82543) {
1066 netdev->hw_features = NETIF_F_SG |
1069 netdev->features = NETIF_F_HW_VLAN_TX |
1070 NETIF_F_HW_VLAN_FILTER;
1073 if ((hw->mac_type >= e1000_82544) &&
1074 (hw->mac_type != e1000_82547))
1075 netdev->hw_features |= NETIF_F_TSO;
1077 netdev->priv_flags |= IFF_SUPP_NOFCS;
1079 netdev->features |= netdev->hw_features;
1080 netdev->hw_features |= NETIF_F_RXCSUM;
1081 netdev->hw_features |= NETIF_F_RXFCS;
1083 if (pci_using_dac) {
1084 netdev->features |= NETIF_F_HIGHDMA;
1085 netdev->vlan_features |= NETIF_F_HIGHDMA;
1088 netdev->vlan_features |= NETIF_F_TSO;
1089 netdev->vlan_features |= NETIF_F_HW_CSUM;
1090 netdev->vlan_features |= NETIF_F_SG;
1092 netdev->priv_flags |= IFF_UNICAST_FLT;
1094 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1096 /* initialize eeprom parameters */
1097 if (e1000_init_eeprom_params(hw)) {
1098 e_err(probe, "EEPROM initialization failed\n");
1102 /* before reading the EEPROM, reset the controller to
1103 * put the device in a known good starting state */
1107 /* make sure the EEPROM is good */
1108 if (e1000_validate_eeprom_checksum(hw) < 0) {
1109 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1110 e1000_dump_eeprom(adapter);
1112 * set MAC address to all zeroes to invalidate and temporary
1113 * disable this device for the user. This blocks regular
1114 * traffic while still permitting ethtool ioctls from reaching
1115 * the hardware as well as allowing the user to run the
1116 * interface after manually setting a hw addr using
1119 memset(hw->mac_addr, 0, netdev->addr_len);
1121 /* copy the MAC address out of the EEPROM */
1122 if (e1000_read_mac_addr(hw))
1123 e_err(probe, "EEPROM Read Error\n");
1125 /* don't block initalization here due to bad MAC address */
1126 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1127 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1129 if (!is_valid_ether_addr(netdev->perm_addr))
1130 e_err(probe, "Invalid MAC Address\n");
1133 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1134 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1135 e1000_82547_tx_fifo_stall_task);
1136 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1137 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1139 e1000_check_options(adapter);
1141 /* Initial Wake on LAN setting
1142 * If APM wake is enabled in the EEPROM,
1143 * enable the ACPI Magic Packet filter
1146 switch (hw->mac_type) {
1147 case e1000_82542_rev2_0:
1148 case e1000_82542_rev2_1:
1152 e1000_read_eeprom(hw,
1153 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1154 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1157 case e1000_82546_rev_3:
1158 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1159 e1000_read_eeprom(hw,
1160 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1165 e1000_read_eeprom(hw,
1166 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1169 if (eeprom_data & eeprom_apme_mask)
1170 adapter->eeprom_wol |= E1000_WUFC_MAG;
1172 /* now that we have the eeprom settings, apply the special cases
1173 * where the eeprom may be wrong or the board simply won't support
1174 * wake on lan on a particular port */
1175 switch (pdev->device) {
1176 case E1000_DEV_ID_82546GB_PCIE:
1177 adapter->eeprom_wol = 0;
1179 case E1000_DEV_ID_82546EB_FIBER:
1180 case E1000_DEV_ID_82546GB_FIBER:
1181 /* Wake events only supported on port A for dual fiber
1182 * regardless of eeprom setting */
1183 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1184 adapter->eeprom_wol = 0;
1186 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1187 /* if quad port adapter, disable WoL on all but port A */
1188 if (global_quad_port_a != 0)
1189 adapter->eeprom_wol = 0;
1191 adapter->quad_port_a = true;
1192 /* Reset for multiple quad port adapters */
1193 if (++global_quad_port_a == 4)
1194 global_quad_port_a = 0;
1198 /* initialize the wol settings based on the eeprom settings */
1199 adapter->wol = adapter->eeprom_wol;
1200 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1202 /* Auto detect PHY address */
1203 if (hw->mac_type == e1000_ce4100) {
1204 for (i = 0; i < 32; i++) {
1206 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1207 if (tmp == 0 || tmp == 0xFF) {
1216 /* reset the hardware with the new settings */
1217 e1000_reset(adapter);
1219 strcpy(netdev->name, "eth%d");
1220 err = register_netdev(netdev);
1224 e1000_vlan_filter_on_off(adapter, false);
1226 /* print bus type/speed/width info */
1227 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1228 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1229 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1230 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1231 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1232 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1233 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1236 /* carrier off reporting is important to ethtool even BEFORE open */
1237 netif_carrier_off(netdev);
1239 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1246 e1000_phy_hw_reset(hw);
1248 if (hw->flash_address)
1249 iounmap(hw->flash_address);
1250 kfree(adapter->tx_ring);
1251 kfree(adapter->rx_ring);
1255 iounmap(hw->ce4100_gbe_mdio_base_virt);
1256 iounmap(hw->hw_addr);
1258 free_netdev(netdev);
1260 pci_release_selected_regions(pdev, bars);
1262 pci_disable_device(pdev);
1267 * e1000_remove - Device Removal Routine
1268 * @pdev: PCI device information struct
1270 * e1000_remove is called by the PCI subsystem to alert the driver
1271 * that it should release a PCI device. The could be caused by a
1272 * Hot-Plug event, or because the driver is going to be removed from
1276 static void __devexit e1000_remove(struct pci_dev *pdev)
1278 struct net_device *netdev = pci_get_drvdata(pdev);
1279 struct e1000_adapter *adapter = netdev_priv(netdev);
1280 struct e1000_hw *hw = &adapter->hw;
1282 e1000_down_and_stop(adapter);
1283 e1000_release_manageability(adapter);
1285 unregister_netdev(netdev);
1287 e1000_phy_hw_reset(hw);
1289 kfree(adapter->tx_ring);
1290 kfree(adapter->rx_ring);
1292 if (hw->mac_type == e1000_ce4100)
1293 iounmap(hw->ce4100_gbe_mdio_base_virt);
1294 iounmap(hw->hw_addr);
1295 if (hw->flash_address)
1296 iounmap(hw->flash_address);
1297 pci_release_selected_regions(pdev, adapter->bars);
1299 free_netdev(netdev);
1301 pci_disable_device(pdev);
1305 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1306 * @adapter: board private structure to initialize
1308 * e1000_sw_init initializes the Adapter private data structure.
1309 * e1000_init_hw_struct MUST be called before this function
1312 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1314 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1316 adapter->num_tx_queues = 1;
1317 adapter->num_rx_queues = 1;
1319 if (e1000_alloc_queues(adapter)) {
1320 e_err(probe, "Unable to allocate memory for queues\n");
1324 /* Explicitly disable IRQ since the NIC can be in any state. */
1325 e1000_irq_disable(adapter);
1327 spin_lock_init(&adapter->stats_lock);
1328 mutex_init(&adapter->mutex);
1330 set_bit(__E1000_DOWN, &adapter->flags);
1336 * e1000_alloc_queues - Allocate memory for all rings
1337 * @adapter: board private structure to initialize
1339 * We allocate one ring per queue at run-time since we don't know the
1340 * number of queues at compile-time.
1343 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1345 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1346 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1347 if (!adapter->tx_ring)
1350 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1351 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1352 if (!adapter->rx_ring) {
1353 kfree(adapter->tx_ring);
1357 return E1000_SUCCESS;
1361 * e1000_open - Called when a network interface is made active
1362 * @netdev: network interface device structure
1364 * Returns 0 on success, negative value on failure
1366 * The open entry point is called when a network interface is made
1367 * active by the system (IFF_UP). At this point all resources needed
1368 * for transmit and receive operations are allocated, the interrupt
1369 * handler is registered with the OS, the watchdog task is started,
1370 * and the stack is notified that the interface is ready.
1373 static int e1000_open(struct net_device *netdev)
1375 struct e1000_adapter *adapter = netdev_priv(netdev);
1376 struct e1000_hw *hw = &adapter->hw;
1379 /* disallow open during test */
1380 if (test_bit(__E1000_TESTING, &adapter->flags))
1383 netif_carrier_off(netdev);
1385 /* allocate transmit descriptors */
1386 err = e1000_setup_all_tx_resources(adapter);
1390 /* allocate receive descriptors */
1391 err = e1000_setup_all_rx_resources(adapter);
1395 e1000_power_up_phy(adapter);
1397 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1398 if ((hw->mng_cookie.status &
1399 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1400 e1000_update_mng_vlan(adapter);
1403 /* before we allocate an interrupt, we must be ready to handle it.
1404 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1405 * as soon as we call pci_request_irq, so we have to setup our
1406 * clean_rx handler before we do so. */
1407 e1000_configure(adapter);
1409 err = e1000_request_irq(adapter);
1413 /* From here on the code is the same as e1000_up() */
1414 clear_bit(__E1000_DOWN, &adapter->flags);
1416 napi_enable(&adapter->napi);
1418 e1000_irq_enable(adapter);
1420 netif_start_queue(netdev);
1422 /* fire a link status change interrupt to start the watchdog */
1423 ew32(ICS, E1000_ICS_LSC);
1425 return E1000_SUCCESS;
1428 e1000_power_down_phy(adapter);
1429 e1000_free_all_rx_resources(adapter);
1431 e1000_free_all_tx_resources(adapter);
1433 e1000_reset(adapter);
1439 * e1000_close - Disables a network interface
1440 * @netdev: network interface device structure
1442 * Returns 0, this is not allowed to fail
1444 * The close entry point is called when an interface is de-activated
1445 * by the OS. The hardware is still under the drivers control, but
1446 * needs to be disabled. A global MAC reset is issued to stop the
1447 * hardware, and all transmit and receive resources are freed.
1450 static int e1000_close(struct net_device *netdev)
1452 struct e1000_adapter *adapter = netdev_priv(netdev);
1453 struct e1000_hw *hw = &adapter->hw;
1455 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1456 e1000_down(adapter);
1457 e1000_power_down_phy(adapter);
1458 e1000_free_irq(adapter);
1460 e1000_free_all_tx_resources(adapter);
1461 e1000_free_all_rx_resources(adapter);
1463 /* kill manageability vlan ID if supported, but not if a vlan with
1464 * the same ID is registered on the host OS (let 8021q kill it) */
1465 if ((hw->mng_cookie.status &
1466 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1467 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1468 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1475 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1476 * @adapter: address of board private structure
1477 * @start: address of beginning of memory
1478 * @len: length of memory
1480 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1483 struct e1000_hw *hw = &adapter->hw;
1484 unsigned long begin = (unsigned long)start;
1485 unsigned long end = begin + len;
1487 /* First rev 82545 and 82546 need to not allow any memory
1488 * write location to cross 64k boundary due to errata 23 */
1489 if (hw->mac_type == e1000_82545 ||
1490 hw->mac_type == e1000_ce4100 ||
1491 hw->mac_type == e1000_82546) {
1492 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1499 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1500 * @adapter: board private structure
1501 * @txdr: tx descriptor ring (for a specific queue) to setup
1503 * Return 0 on success, negative on failure
1506 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1507 struct e1000_tx_ring *txdr)
1509 struct pci_dev *pdev = adapter->pdev;
1512 size = sizeof(struct e1000_buffer) * txdr->count;
1513 txdr->buffer_info = vzalloc(size);
1514 if (!txdr->buffer_info) {
1515 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1520 /* round up to nearest 4K */
1522 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1523 txdr->size = ALIGN(txdr->size, 4096);
1525 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1529 vfree(txdr->buffer_info);
1530 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1535 /* Fix for errata 23, can't cross 64kB boundary */
1536 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1537 void *olddesc = txdr->desc;
1538 dma_addr_t olddma = txdr->dma;
1539 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1540 txdr->size, txdr->desc);
1541 /* Try again, without freeing the previous */
1542 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1543 &txdr->dma, GFP_KERNEL);
1544 /* Failed allocation, critical failure */
1546 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1548 goto setup_tx_desc_die;
1551 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1553 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1555 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1557 e_err(probe, "Unable to allocate aligned memory "
1558 "for the transmit descriptor ring\n");
1559 vfree(txdr->buffer_info);
1562 /* Free old allocation, new allocation was successful */
1563 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1567 memset(txdr->desc, 0, txdr->size);
1569 txdr->next_to_use = 0;
1570 txdr->next_to_clean = 0;
1576 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1577 * (Descriptors) for all queues
1578 * @adapter: board private structure
1580 * Return 0 on success, negative on failure
1583 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1587 for (i = 0; i < adapter->num_tx_queues; i++) {
1588 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1590 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1591 for (i-- ; i >= 0; i--)
1592 e1000_free_tx_resources(adapter,
1593 &adapter->tx_ring[i]);
1602 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1603 * @adapter: board private structure
1605 * Configure the Tx unit of the MAC after a reset.
1608 static void e1000_configure_tx(struct e1000_adapter *adapter)
1611 struct e1000_hw *hw = &adapter->hw;
1612 u32 tdlen, tctl, tipg;
1615 /* Setup the HW Tx Head and Tail descriptor pointers */
1617 switch (adapter->num_tx_queues) {
1620 tdba = adapter->tx_ring[0].dma;
1621 tdlen = adapter->tx_ring[0].count *
1622 sizeof(struct e1000_tx_desc);
1624 ew32(TDBAH, (tdba >> 32));
1625 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1628 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1629 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1633 /* Set the default values for the Tx Inter Packet Gap timer */
1634 if ((hw->media_type == e1000_media_type_fiber ||
1635 hw->media_type == e1000_media_type_internal_serdes))
1636 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1638 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1640 switch (hw->mac_type) {
1641 case e1000_82542_rev2_0:
1642 case e1000_82542_rev2_1:
1643 tipg = DEFAULT_82542_TIPG_IPGT;
1644 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1645 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1648 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1649 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1652 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1653 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1656 /* Set the Tx Interrupt Delay register */
1658 ew32(TIDV, adapter->tx_int_delay);
1659 if (hw->mac_type >= e1000_82540)
1660 ew32(TADV, adapter->tx_abs_int_delay);
1662 /* Program the Transmit Control Register */
1665 tctl &= ~E1000_TCTL_CT;
1666 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1667 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1669 e1000_config_collision_dist(hw);
1671 /* Setup Transmit Descriptor Settings for eop descriptor */
1672 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1674 /* only set IDE if we are delaying interrupts using the timers */
1675 if (adapter->tx_int_delay)
1676 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1678 if (hw->mac_type < e1000_82543)
1679 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1681 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1683 /* Cache if we're 82544 running in PCI-X because we'll
1684 * need this to apply a workaround later in the send path. */
1685 if (hw->mac_type == e1000_82544 &&
1686 hw->bus_type == e1000_bus_type_pcix)
1687 adapter->pcix_82544 = true;
1694 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1695 * @adapter: board private structure
1696 * @rxdr: rx descriptor ring (for a specific queue) to setup
1698 * Returns 0 on success, negative on failure
1701 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1702 struct e1000_rx_ring *rxdr)
1704 struct pci_dev *pdev = adapter->pdev;
1707 size = sizeof(struct e1000_buffer) * rxdr->count;
1708 rxdr->buffer_info = vzalloc(size);
1709 if (!rxdr->buffer_info) {
1710 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1715 desc_len = sizeof(struct e1000_rx_desc);
1717 /* Round up to nearest 4K */
1719 rxdr->size = rxdr->count * desc_len;
1720 rxdr->size = ALIGN(rxdr->size, 4096);
1722 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1726 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1729 vfree(rxdr->buffer_info);
1733 /* Fix for errata 23, can't cross 64kB boundary */
1734 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1735 void *olddesc = rxdr->desc;
1736 dma_addr_t olddma = rxdr->dma;
1737 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1738 rxdr->size, rxdr->desc);
1739 /* Try again, without freeing the previous */
1740 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1741 &rxdr->dma, GFP_KERNEL);
1742 /* Failed allocation, critical failure */
1744 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1746 e_err(probe, "Unable to allocate memory for the Rx "
1747 "descriptor ring\n");
1748 goto setup_rx_desc_die;
1751 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1753 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1755 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1757 e_err(probe, "Unable to allocate aligned memory for "
1758 "the Rx descriptor ring\n");
1759 goto setup_rx_desc_die;
1761 /* Free old allocation, new allocation was successful */
1762 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1766 memset(rxdr->desc, 0, rxdr->size);
1768 rxdr->next_to_clean = 0;
1769 rxdr->next_to_use = 0;
1770 rxdr->rx_skb_top = NULL;
1776 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1777 * (Descriptors) for all queues
1778 * @adapter: board private structure
1780 * Return 0 on success, negative on failure
1783 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1787 for (i = 0; i < adapter->num_rx_queues; i++) {
1788 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1790 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1791 for (i-- ; i >= 0; i--)
1792 e1000_free_rx_resources(adapter,
1793 &adapter->rx_ring[i]);
1802 * e1000_setup_rctl - configure the receive control registers
1803 * @adapter: Board private structure
1805 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1807 struct e1000_hw *hw = &adapter->hw;
1812 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1814 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1815 E1000_RCTL_RDMTS_HALF |
1816 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1818 if (hw->tbi_compatibility_on == 1)
1819 rctl |= E1000_RCTL_SBP;
1821 rctl &= ~E1000_RCTL_SBP;
1823 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1824 rctl &= ~E1000_RCTL_LPE;
1826 rctl |= E1000_RCTL_LPE;
1828 /* Setup buffer sizes */
1829 rctl &= ~E1000_RCTL_SZ_4096;
1830 rctl |= E1000_RCTL_BSEX;
1831 switch (adapter->rx_buffer_len) {
1832 case E1000_RXBUFFER_2048:
1834 rctl |= E1000_RCTL_SZ_2048;
1835 rctl &= ~E1000_RCTL_BSEX;
1837 case E1000_RXBUFFER_4096:
1838 rctl |= E1000_RCTL_SZ_4096;
1840 case E1000_RXBUFFER_8192:
1841 rctl |= E1000_RCTL_SZ_8192;
1843 case E1000_RXBUFFER_16384:
1844 rctl |= E1000_RCTL_SZ_16384;
1852 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1853 * @adapter: board private structure
1855 * Configure the Rx unit of the MAC after a reset.
1858 static void e1000_configure_rx(struct e1000_adapter *adapter)
1861 struct e1000_hw *hw = &adapter->hw;
1862 u32 rdlen, rctl, rxcsum;
1864 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1865 rdlen = adapter->rx_ring[0].count *
1866 sizeof(struct e1000_rx_desc);
1867 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1868 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1870 rdlen = adapter->rx_ring[0].count *
1871 sizeof(struct e1000_rx_desc);
1872 adapter->clean_rx = e1000_clean_rx_irq;
1873 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1876 /* disable receives while setting up the descriptors */
1878 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1880 /* set the Receive Delay Timer Register */
1881 ew32(RDTR, adapter->rx_int_delay);
1883 if (hw->mac_type >= e1000_82540) {
1884 ew32(RADV, adapter->rx_abs_int_delay);
1885 if (adapter->itr_setting != 0)
1886 ew32(ITR, 1000000000 / (adapter->itr * 256));
1889 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1890 * the Base and Length of the Rx Descriptor Ring */
1891 switch (adapter->num_rx_queues) {
1894 rdba = adapter->rx_ring[0].dma;
1896 ew32(RDBAH, (rdba >> 32));
1897 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1900 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1901 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1905 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1906 if (hw->mac_type >= e1000_82543) {
1907 rxcsum = er32(RXCSUM);
1908 if (adapter->rx_csum)
1909 rxcsum |= E1000_RXCSUM_TUOFL;
1911 /* don't need to clear IPPCSE as it defaults to 0 */
1912 rxcsum &= ~E1000_RXCSUM_TUOFL;
1913 ew32(RXCSUM, rxcsum);
1916 /* Enable Receives */
1917 ew32(RCTL, rctl | E1000_RCTL_EN);
1921 * e1000_free_tx_resources - Free Tx Resources per Queue
1922 * @adapter: board private structure
1923 * @tx_ring: Tx descriptor ring for a specific queue
1925 * Free all transmit software resources
1928 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1929 struct e1000_tx_ring *tx_ring)
1931 struct pci_dev *pdev = adapter->pdev;
1933 e1000_clean_tx_ring(adapter, tx_ring);
1935 vfree(tx_ring->buffer_info);
1936 tx_ring->buffer_info = NULL;
1938 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1941 tx_ring->desc = NULL;
1945 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1946 * @adapter: board private structure
1948 * Free all transmit software resources
1951 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1955 for (i = 0; i < adapter->num_tx_queues; i++)
1956 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1959 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1960 struct e1000_buffer *buffer_info)
1962 if (buffer_info->dma) {
1963 if (buffer_info->mapped_as_page)
1964 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1965 buffer_info->length, DMA_TO_DEVICE);
1967 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1968 buffer_info->length,
1970 buffer_info->dma = 0;
1972 if (buffer_info->skb) {
1973 dev_kfree_skb_any(buffer_info->skb);
1974 buffer_info->skb = NULL;
1976 buffer_info->time_stamp = 0;
1977 /* buffer_info must be completely set up in the transmit path */
1981 * e1000_clean_tx_ring - Free Tx Buffers
1982 * @adapter: board private structure
1983 * @tx_ring: ring to be cleaned
1986 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1987 struct e1000_tx_ring *tx_ring)
1989 struct e1000_hw *hw = &adapter->hw;
1990 struct e1000_buffer *buffer_info;
1994 /* Free all the Tx ring sk_buffs */
1996 for (i = 0; i < tx_ring->count; i++) {
1997 buffer_info = &tx_ring->buffer_info[i];
1998 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2001 size = sizeof(struct e1000_buffer) * tx_ring->count;
2002 memset(tx_ring->buffer_info, 0, size);
2004 /* Zero out the descriptor ring */
2006 memset(tx_ring->desc, 0, tx_ring->size);
2008 tx_ring->next_to_use = 0;
2009 tx_ring->next_to_clean = 0;
2010 tx_ring->last_tx_tso = false;
2012 writel(0, hw->hw_addr + tx_ring->tdh);
2013 writel(0, hw->hw_addr + tx_ring->tdt);
2017 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2018 * @adapter: board private structure
2021 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2025 for (i = 0; i < adapter->num_tx_queues; i++)
2026 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2030 * e1000_free_rx_resources - Free Rx Resources
2031 * @adapter: board private structure
2032 * @rx_ring: ring to clean the resources from
2034 * Free all receive software resources
2037 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2038 struct e1000_rx_ring *rx_ring)
2040 struct pci_dev *pdev = adapter->pdev;
2042 e1000_clean_rx_ring(adapter, rx_ring);
2044 vfree(rx_ring->buffer_info);
2045 rx_ring->buffer_info = NULL;
2047 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2050 rx_ring->desc = NULL;
2054 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2055 * @adapter: board private structure
2057 * Free all receive software resources
2060 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2064 for (i = 0; i < adapter->num_rx_queues; i++)
2065 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2069 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2070 * @adapter: board private structure
2071 * @rx_ring: ring to free buffers from
2074 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2075 struct e1000_rx_ring *rx_ring)
2077 struct e1000_hw *hw = &adapter->hw;
2078 struct e1000_buffer *buffer_info;
2079 struct pci_dev *pdev = adapter->pdev;
2083 /* Free all the Rx ring sk_buffs */
2084 for (i = 0; i < rx_ring->count; i++) {
2085 buffer_info = &rx_ring->buffer_info[i];
2086 if (buffer_info->dma &&
2087 adapter->clean_rx == e1000_clean_rx_irq) {
2088 dma_unmap_single(&pdev->dev, buffer_info->dma,
2089 buffer_info->length,
2091 } else if (buffer_info->dma &&
2092 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2093 dma_unmap_page(&pdev->dev, buffer_info->dma,
2094 buffer_info->length,
2098 buffer_info->dma = 0;
2099 if (buffer_info->page) {
2100 put_page(buffer_info->page);
2101 buffer_info->page = NULL;
2103 if (buffer_info->skb) {
2104 dev_kfree_skb(buffer_info->skb);
2105 buffer_info->skb = NULL;
2109 /* there also may be some cached data from a chained receive */
2110 if (rx_ring->rx_skb_top) {
2111 dev_kfree_skb(rx_ring->rx_skb_top);
2112 rx_ring->rx_skb_top = NULL;
2115 size = sizeof(struct e1000_buffer) * rx_ring->count;
2116 memset(rx_ring->buffer_info, 0, size);
2118 /* Zero out the descriptor ring */
2119 memset(rx_ring->desc, 0, rx_ring->size);
2121 rx_ring->next_to_clean = 0;
2122 rx_ring->next_to_use = 0;
2124 writel(0, hw->hw_addr + rx_ring->rdh);
2125 writel(0, hw->hw_addr + rx_ring->rdt);
2129 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2130 * @adapter: board private structure
2133 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2137 for (i = 0; i < adapter->num_rx_queues; i++)
2138 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2141 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2142 * and memory write and invalidate disabled for certain operations
2144 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2146 struct e1000_hw *hw = &adapter->hw;
2147 struct net_device *netdev = adapter->netdev;
2150 e1000_pci_clear_mwi(hw);
2153 rctl |= E1000_RCTL_RST;
2155 E1000_WRITE_FLUSH();
2158 if (netif_running(netdev))
2159 e1000_clean_all_rx_rings(adapter);
2162 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2164 struct e1000_hw *hw = &adapter->hw;
2165 struct net_device *netdev = adapter->netdev;
2169 rctl &= ~E1000_RCTL_RST;
2171 E1000_WRITE_FLUSH();
2174 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2175 e1000_pci_set_mwi(hw);
2177 if (netif_running(netdev)) {
2178 /* No need to loop, because 82542 supports only 1 queue */
2179 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2180 e1000_configure_rx(adapter);
2181 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2186 * e1000_set_mac - Change the Ethernet Address of the NIC
2187 * @netdev: network interface device structure
2188 * @p: pointer to an address structure
2190 * Returns 0 on success, negative on failure
2193 static int e1000_set_mac(struct net_device *netdev, void *p)
2195 struct e1000_adapter *adapter = netdev_priv(netdev);
2196 struct e1000_hw *hw = &adapter->hw;
2197 struct sockaddr *addr = p;
2199 if (!is_valid_ether_addr(addr->sa_data))
2200 return -EADDRNOTAVAIL;
2202 /* 82542 2.0 needs to be in reset to write receive address registers */
2204 if (hw->mac_type == e1000_82542_rev2_0)
2205 e1000_enter_82542_rst(adapter);
2207 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2208 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2210 e1000_rar_set(hw, hw->mac_addr, 0);
2212 if (hw->mac_type == e1000_82542_rev2_0)
2213 e1000_leave_82542_rst(adapter);
2219 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2220 * @netdev: network interface device structure
2222 * The set_rx_mode entry point is called whenever the unicast or multicast
2223 * address lists or the network interface flags are updated. This routine is
2224 * responsible for configuring the hardware for proper unicast, multicast,
2225 * promiscuous mode, and all-multi behavior.
2228 static void e1000_set_rx_mode(struct net_device *netdev)
2230 struct e1000_adapter *adapter = netdev_priv(netdev);
2231 struct e1000_hw *hw = &adapter->hw;
2232 struct netdev_hw_addr *ha;
2233 bool use_uc = false;
2236 int i, rar_entries = E1000_RAR_ENTRIES;
2237 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2238 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2241 e_err(probe, "memory allocation failed\n");
2245 /* Check for Promiscuous and All Multicast modes */
2249 if (netdev->flags & IFF_PROMISC) {
2250 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2251 rctl &= ~E1000_RCTL_VFE;
2253 if (netdev->flags & IFF_ALLMULTI)
2254 rctl |= E1000_RCTL_MPE;
2256 rctl &= ~E1000_RCTL_MPE;
2257 /* Enable VLAN filter if there is a VLAN */
2258 if (e1000_vlan_used(adapter))
2259 rctl |= E1000_RCTL_VFE;
2262 if (netdev_uc_count(netdev) > rar_entries - 1) {
2263 rctl |= E1000_RCTL_UPE;
2264 } else if (!(netdev->flags & IFF_PROMISC)) {
2265 rctl &= ~E1000_RCTL_UPE;
2271 /* 82542 2.0 needs to be in reset to write receive address registers */
2273 if (hw->mac_type == e1000_82542_rev2_0)
2274 e1000_enter_82542_rst(adapter);
2276 /* load the first 14 addresses into the exact filters 1-14. Unicast
2277 * addresses take precedence to avoid disabling unicast filtering
2280 * RAR 0 is used for the station MAC address
2281 * if there are not 14 addresses, go ahead and clear the filters
2285 netdev_for_each_uc_addr(ha, netdev) {
2286 if (i == rar_entries)
2288 e1000_rar_set(hw, ha->addr, i++);
2291 netdev_for_each_mc_addr(ha, netdev) {
2292 if (i == rar_entries) {
2293 /* load any remaining addresses into the hash table */
2294 u32 hash_reg, hash_bit, mta;
2295 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2296 hash_reg = (hash_value >> 5) & 0x7F;
2297 hash_bit = hash_value & 0x1F;
2298 mta = (1 << hash_bit);
2299 mcarray[hash_reg] |= mta;
2301 e1000_rar_set(hw, ha->addr, i++);
2305 for (; i < rar_entries; i++) {
2306 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2307 E1000_WRITE_FLUSH();
2308 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2309 E1000_WRITE_FLUSH();
2312 /* write the hash table completely, write from bottom to avoid
2313 * both stupid write combining chipsets, and flushing each write */
2314 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2316 * If we are on an 82544 has an errata where writing odd
2317 * offsets overwrites the previous even offset, but writing
2318 * backwards over the range solves the issue by always
2319 * writing the odd offset first
2321 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2323 E1000_WRITE_FLUSH();
2325 if (hw->mac_type == e1000_82542_rev2_0)
2326 e1000_leave_82542_rst(adapter);
2332 * e1000_update_phy_info_task - get phy info
2333 * @work: work struct contained inside adapter struct
2335 * Need to wait a few seconds after link up to get diagnostic information from
2338 static void e1000_update_phy_info_task(struct work_struct *work)
2340 struct e1000_adapter *adapter = container_of(work,
2341 struct e1000_adapter,
2342 phy_info_task.work);
2343 if (test_bit(__E1000_DOWN, &adapter->flags))
2345 mutex_lock(&adapter->mutex);
2346 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2347 mutex_unlock(&adapter->mutex);
2351 * e1000_82547_tx_fifo_stall_task - task to complete work
2352 * @work: work struct contained inside adapter struct
2354 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2356 struct e1000_adapter *adapter = container_of(work,
2357 struct e1000_adapter,
2358 fifo_stall_task.work);
2359 struct e1000_hw *hw = &adapter->hw;
2360 struct net_device *netdev = adapter->netdev;
2363 if (test_bit(__E1000_DOWN, &adapter->flags))
2365 mutex_lock(&adapter->mutex);
2366 if (atomic_read(&adapter->tx_fifo_stall)) {
2367 if ((er32(TDT) == er32(TDH)) &&
2368 (er32(TDFT) == er32(TDFH)) &&
2369 (er32(TDFTS) == er32(TDFHS))) {
2371 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2372 ew32(TDFT, adapter->tx_head_addr);
2373 ew32(TDFH, adapter->tx_head_addr);
2374 ew32(TDFTS, adapter->tx_head_addr);
2375 ew32(TDFHS, adapter->tx_head_addr);
2377 E1000_WRITE_FLUSH();
2379 adapter->tx_fifo_head = 0;
2380 atomic_set(&adapter->tx_fifo_stall, 0);
2381 netif_wake_queue(netdev);
2382 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2383 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2386 mutex_unlock(&adapter->mutex);
2389 bool e1000_has_link(struct e1000_adapter *adapter)
2391 struct e1000_hw *hw = &adapter->hw;
2392 bool link_active = false;
2394 /* get_link_status is set on LSC (link status) interrupt or rx
2395 * sequence error interrupt (except on intel ce4100).
2396 * get_link_status will stay false until the
2397 * e1000_check_for_link establishes link for copper adapters
2400 switch (hw->media_type) {
2401 case e1000_media_type_copper:
2402 if (hw->mac_type == e1000_ce4100)
2403 hw->get_link_status = 1;
2404 if (hw->get_link_status) {
2405 e1000_check_for_link(hw);
2406 link_active = !hw->get_link_status;
2411 case e1000_media_type_fiber:
2412 e1000_check_for_link(hw);
2413 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2415 case e1000_media_type_internal_serdes:
2416 e1000_check_for_link(hw);
2417 link_active = hw->serdes_has_link;
2427 * e1000_watchdog - work function
2428 * @work: work struct contained inside adapter struct
2430 static void e1000_watchdog(struct work_struct *work)
2432 struct e1000_adapter *adapter = container_of(work,
2433 struct e1000_adapter,
2434 watchdog_task.work);
2435 struct e1000_hw *hw = &adapter->hw;
2436 struct net_device *netdev = adapter->netdev;
2437 struct e1000_tx_ring *txdr = adapter->tx_ring;
2440 if (test_bit(__E1000_DOWN, &adapter->flags))
2443 mutex_lock(&adapter->mutex);
2444 link = e1000_has_link(adapter);
2445 if ((netif_carrier_ok(netdev)) && link)
2449 if (!netif_carrier_ok(netdev)) {
2452 /* update snapshot of PHY registers on LSC */
2453 e1000_get_speed_and_duplex(hw,
2454 &adapter->link_speed,
2455 &adapter->link_duplex);
2458 pr_info("%s NIC Link is Up %d Mbps %s, "
2459 "Flow Control: %s\n",
2461 adapter->link_speed,
2462 adapter->link_duplex == FULL_DUPLEX ?
2463 "Full Duplex" : "Half Duplex",
2464 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2465 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2466 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2467 E1000_CTRL_TFCE) ? "TX" : "None")));
2469 /* adjust timeout factor according to speed/duplex */
2470 adapter->tx_timeout_factor = 1;
2471 switch (adapter->link_speed) {
2474 adapter->tx_timeout_factor = 16;
2478 /* maybe add some timeout factor ? */
2482 /* enable transmits in the hardware */
2484 tctl |= E1000_TCTL_EN;
2487 netif_carrier_on(netdev);
2488 if (!test_bit(__E1000_DOWN, &adapter->flags))
2489 schedule_delayed_work(&adapter->phy_info_task,
2491 adapter->smartspeed = 0;
2494 if (netif_carrier_ok(netdev)) {
2495 adapter->link_speed = 0;
2496 adapter->link_duplex = 0;
2497 pr_info("%s NIC Link is Down\n",
2499 netif_carrier_off(netdev);
2501 if (!test_bit(__E1000_DOWN, &adapter->flags))
2502 schedule_delayed_work(&adapter->phy_info_task,
2506 e1000_smartspeed(adapter);
2510 e1000_update_stats(adapter);
2512 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2513 adapter->tpt_old = adapter->stats.tpt;
2514 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2515 adapter->colc_old = adapter->stats.colc;
2517 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2518 adapter->gorcl_old = adapter->stats.gorcl;
2519 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2520 adapter->gotcl_old = adapter->stats.gotcl;
2522 e1000_update_adaptive(hw);
2524 if (!netif_carrier_ok(netdev)) {
2525 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2526 /* We've lost link, so the controller stops DMA,
2527 * but we've got queued Tx work that's never going
2528 * to get done, so reset controller to flush Tx.
2529 * (Do the reset outside of interrupt context). */
2530 adapter->tx_timeout_count++;
2531 schedule_work(&adapter->reset_task);
2532 /* exit immediately since reset is imminent */
2537 /* Simple mode for Interrupt Throttle Rate (ITR) */
2538 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2540 * Symmetric Tx/Rx gets a reduced ITR=2000;
2541 * Total asymmetrical Tx or Rx gets ITR=8000;
2542 * everyone else is between 2000-8000.
2544 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2545 u32 dif = (adapter->gotcl > adapter->gorcl ?
2546 adapter->gotcl - adapter->gorcl :
2547 adapter->gorcl - adapter->gotcl) / 10000;
2548 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2550 ew32(ITR, 1000000000 / (itr * 256));
2553 /* Cause software interrupt to ensure rx ring is cleaned */
2554 ew32(ICS, E1000_ICS_RXDMT0);
2556 /* Force detection of hung controller every watchdog period */
2557 adapter->detect_tx_hung = true;
2559 /* Reschedule the task */
2560 if (!test_bit(__E1000_DOWN, &adapter->flags))
2561 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2564 mutex_unlock(&adapter->mutex);
2567 enum latency_range {
2571 latency_invalid = 255
2575 * e1000_update_itr - update the dynamic ITR value based on statistics
2576 * @adapter: pointer to adapter
2577 * @itr_setting: current adapter->itr
2578 * @packets: the number of packets during this measurement interval
2579 * @bytes: the number of bytes during this measurement interval
2581 * Stores a new ITR value based on packets and byte
2582 * counts during the last interrupt. The advantage of per interrupt
2583 * computation is faster updates and more accurate ITR for the current
2584 * traffic pattern. Constants in this function were computed
2585 * based on theoretical maximum wire speed and thresholds were set based
2586 * on testing data as well as attempting to minimize response time
2587 * while increasing bulk throughput.
2588 * this functionality is controlled by the InterruptThrottleRate module
2589 * parameter (see e1000_param.c)
2591 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2592 u16 itr_setting, int packets, int bytes)
2594 unsigned int retval = itr_setting;
2595 struct e1000_hw *hw = &adapter->hw;
2597 if (unlikely(hw->mac_type < e1000_82540))
2598 goto update_itr_done;
2601 goto update_itr_done;
2603 switch (itr_setting) {
2604 case lowest_latency:
2605 /* jumbo frames get bulk treatment*/
2606 if (bytes/packets > 8000)
2607 retval = bulk_latency;
2608 else if ((packets < 5) && (bytes > 512))
2609 retval = low_latency;
2611 case low_latency: /* 50 usec aka 20000 ints/s */
2612 if (bytes > 10000) {
2613 /* jumbo frames need bulk latency setting */
2614 if (bytes/packets > 8000)
2615 retval = bulk_latency;
2616 else if ((packets < 10) || ((bytes/packets) > 1200))
2617 retval = bulk_latency;
2618 else if ((packets > 35))
2619 retval = lowest_latency;
2620 } else if (bytes/packets > 2000)
2621 retval = bulk_latency;
2622 else if (packets <= 2 && bytes < 512)
2623 retval = lowest_latency;
2625 case bulk_latency: /* 250 usec aka 4000 ints/s */
2626 if (bytes > 25000) {
2628 retval = low_latency;
2629 } else if (bytes < 6000) {
2630 retval = low_latency;
2639 static void e1000_set_itr(struct e1000_adapter *adapter)
2641 struct e1000_hw *hw = &adapter->hw;
2643 u32 new_itr = adapter->itr;
2645 if (unlikely(hw->mac_type < e1000_82540))
2648 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2649 if (unlikely(adapter->link_speed != SPEED_1000)) {
2655 adapter->tx_itr = e1000_update_itr(adapter,
2657 adapter->total_tx_packets,
2658 adapter->total_tx_bytes);
2659 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2660 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2661 adapter->tx_itr = low_latency;
2663 adapter->rx_itr = e1000_update_itr(adapter,
2665 adapter->total_rx_packets,
2666 adapter->total_rx_bytes);
2667 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2668 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2669 adapter->rx_itr = low_latency;
2671 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2673 switch (current_itr) {
2674 /* counts and packets in update_itr are dependent on these numbers */
2675 case lowest_latency:
2679 new_itr = 20000; /* aka hwitr = ~200 */
2689 if (new_itr != adapter->itr) {
2690 /* this attempts to bias the interrupt rate towards Bulk
2691 * by adding intermediate steps when interrupt rate is
2693 new_itr = new_itr > adapter->itr ?
2694 min(adapter->itr + (new_itr >> 2), new_itr) :
2696 adapter->itr = new_itr;
2697 ew32(ITR, 1000000000 / (new_itr * 256));
2701 #define E1000_TX_FLAGS_CSUM 0x00000001
2702 #define E1000_TX_FLAGS_VLAN 0x00000002
2703 #define E1000_TX_FLAGS_TSO 0x00000004
2704 #define E1000_TX_FLAGS_IPV4 0x00000008
2705 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2706 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2707 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2709 static int e1000_tso(struct e1000_adapter *adapter,
2710 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2712 struct e1000_context_desc *context_desc;
2713 struct e1000_buffer *buffer_info;
2716 u16 ipcse = 0, tucse, mss;
2717 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2720 if (skb_is_gso(skb)) {
2721 if (skb_header_cloned(skb)) {
2722 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2727 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2728 mss = skb_shinfo(skb)->gso_size;
2729 if (skb->protocol == htons(ETH_P_IP)) {
2730 struct iphdr *iph = ip_hdr(skb);
2733 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2737 cmd_length = E1000_TXD_CMD_IP;
2738 ipcse = skb_transport_offset(skb) - 1;
2739 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2740 ipv6_hdr(skb)->payload_len = 0;
2741 tcp_hdr(skb)->check =
2742 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2743 &ipv6_hdr(skb)->daddr,
2747 ipcss = skb_network_offset(skb);
2748 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2749 tucss = skb_transport_offset(skb);
2750 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2753 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2754 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2756 i = tx_ring->next_to_use;
2757 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2758 buffer_info = &tx_ring->buffer_info[i];
2760 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2761 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2762 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2763 context_desc->upper_setup.tcp_fields.tucss = tucss;
2764 context_desc->upper_setup.tcp_fields.tucso = tucso;
2765 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2766 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2767 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2768 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2770 buffer_info->time_stamp = jiffies;
2771 buffer_info->next_to_watch = i;
2773 if (++i == tx_ring->count) i = 0;
2774 tx_ring->next_to_use = i;
2781 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2782 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2784 struct e1000_context_desc *context_desc;
2785 struct e1000_buffer *buffer_info;
2788 u32 cmd_len = E1000_TXD_CMD_DEXT;
2790 if (skb->ip_summed != CHECKSUM_PARTIAL)
2793 switch (skb->protocol) {
2794 case cpu_to_be16(ETH_P_IP):
2795 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2796 cmd_len |= E1000_TXD_CMD_TCP;
2798 case cpu_to_be16(ETH_P_IPV6):
2799 /* XXX not handling all IPV6 headers */
2800 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2801 cmd_len |= E1000_TXD_CMD_TCP;
2804 if (unlikely(net_ratelimit()))
2805 e_warn(drv, "checksum_partial proto=%x!\n",
2810 css = skb_checksum_start_offset(skb);
2812 i = tx_ring->next_to_use;
2813 buffer_info = &tx_ring->buffer_info[i];
2814 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2816 context_desc->lower_setup.ip_config = 0;
2817 context_desc->upper_setup.tcp_fields.tucss = css;
2818 context_desc->upper_setup.tcp_fields.tucso =
2819 css + skb->csum_offset;
2820 context_desc->upper_setup.tcp_fields.tucse = 0;
2821 context_desc->tcp_seg_setup.data = 0;
2822 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2824 buffer_info->time_stamp = jiffies;
2825 buffer_info->next_to_watch = i;
2827 if (unlikely(++i == tx_ring->count)) i = 0;
2828 tx_ring->next_to_use = i;
2833 #define E1000_MAX_TXD_PWR 12
2834 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2836 static int e1000_tx_map(struct e1000_adapter *adapter,
2837 struct e1000_tx_ring *tx_ring,
2838 struct sk_buff *skb, unsigned int first,
2839 unsigned int max_per_txd, unsigned int nr_frags,
2842 struct e1000_hw *hw = &adapter->hw;
2843 struct pci_dev *pdev = adapter->pdev;
2844 struct e1000_buffer *buffer_info;
2845 unsigned int len = skb_headlen(skb);
2846 unsigned int offset = 0, size, count = 0, i;
2847 unsigned int f, bytecount, segs;
2849 i = tx_ring->next_to_use;
2852 buffer_info = &tx_ring->buffer_info[i];
2853 size = min(len, max_per_txd);
2854 /* Workaround for Controller erratum --
2855 * descriptor for non-tso packet in a linear SKB that follows a
2856 * tso gets written back prematurely before the data is fully
2857 * DMA'd to the controller */
2858 if (!skb->data_len && tx_ring->last_tx_tso &&
2860 tx_ring->last_tx_tso = false;
2864 /* Workaround for premature desc write-backs
2865 * in TSO mode. Append 4-byte sentinel desc */
2866 if (unlikely(mss && !nr_frags && size == len && size > 8))
2868 /* work-around for errata 10 and it applies
2869 * to all controllers in PCI-X mode
2870 * The fix is to make sure that the first descriptor of a
2871 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2873 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2874 (size > 2015) && count == 0))
2877 /* Workaround for potential 82544 hang in PCI-X. Avoid
2878 * terminating buffers within evenly-aligned dwords. */
2879 if (unlikely(adapter->pcix_82544 &&
2880 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2884 buffer_info->length = size;
2885 /* set time_stamp *before* dma to help avoid a possible race */
2886 buffer_info->time_stamp = jiffies;
2887 buffer_info->mapped_as_page = false;
2888 buffer_info->dma = dma_map_single(&pdev->dev,
2890 size, DMA_TO_DEVICE);
2891 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2893 buffer_info->next_to_watch = i;
2900 if (unlikely(i == tx_ring->count))
2905 for (f = 0; f < nr_frags; f++) {
2906 const struct skb_frag_struct *frag;
2908 frag = &skb_shinfo(skb)->frags[f];
2909 len = skb_frag_size(frag);
2913 unsigned long bufend;
2915 if (unlikely(i == tx_ring->count))
2918 buffer_info = &tx_ring->buffer_info[i];
2919 size = min(len, max_per_txd);
2920 /* Workaround for premature desc write-backs
2921 * in TSO mode. Append 4-byte sentinel desc */
2922 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2924 /* Workaround for potential 82544 hang in PCI-X.
2925 * Avoid terminating buffers within evenly-aligned
2927 bufend = (unsigned long)
2928 page_to_phys(skb_frag_page(frag));
2929 bufend += offset + size - 1;
2930 if (unlikely(adapter->pcix_82544 &&
2935 buffer_info->length = size;
2936 buffer_info->time_stamp = jiffies;
2937 buffer_info->mapped_as_page = true;
2938 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2939 offset, size, DMA_TO_DEVICE);
2940 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2942 buffer_info->next_to_watch = i;
2950 segs = skb_shinfo(skb)->gso_segs ?: 1;
2951 /* multiply data chunks by size of headers */
2952 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2954 tx_ring->buffer_info[i].skb = skb;
2955 tx_ring->buffer_info[i].segs = segs;
2956 tx_ring->buffer_info[i].bytecount = bytecount;
2957 tx_ring->buffer_info[first].next_to_watch = i;
2962 dev_err(&pdev->dev, "TX DMA map failed\n");
2963 buffer_info->dma = 0;
2969 i += tx_ring->count;
2971 buffer_info = &tx_ring->buffer_info[i];
2972 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2978 static void e1000_tx_queue(struct e1000_adapter *adapter,
2979 struct e1000_tx_ring *tx_ring, int tx_flags,
2982 struct e1000_hw *hw = &adapter->hw;
2983 struct e1000_tx_desc *tx_desc = NULL;
2984 struct e1000_buffer *buffer_info;
2985 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2988 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2989 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2991 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2993 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2994 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2997 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2998 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2999 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3002 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3003 txd_lower |= E1000_TXD_CMD_VLE;
3004 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3007 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3008 txd_lower &= ~(E1000_TXD_CMD_IFCS);
3010 i = tx_ring->next_to_use;
3013 buffer_info = &tx_ring->buffer_info[i];
3014 tx_desc = E1000_TX_DESC(*tx_ring, i);
3015 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3016 tx_desc->lower.data =
3017 cpu_to_le32(txd_lower | buffer_info->length);
3018 tx_desc->upper.data = cpu_to_le32(txd_upper);
3019 if (unlikely(++i == tx_ring->count)) i = 0;
3022 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3024 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3025 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3026 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3028 /* Force memory writes to complete before letting h/w
3029 * know there are new descriptors to fetch. (Only
3030 * applicable for weak-ordered memory model archs,
3031 * such as IA-64). */
3034 tx_ring->next_to_use = i;
3035 writel(i, hw->hw_addr + tx_ring->tdt);
3036 /* we need this if more than one processor can write to our tail
3037 * at a time, it syncronizes IO on IA64/Altix systems */
3042 * 82547 workaround to avoid controller hang in half-duplex environment.
3043 * The workaround is to avoid queuing a large packet that would span
3044 * the internal Tx FIFO ring boundary by notifying the stack to resend
3045 * the packet at a later time. This gives the Tx FIFO an opportunity to
3046 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3047 * to the beginning of the Tx FIFO.
3050 #define E1000_FIFO_HDR 0x10
3051 #define E1000_82547_PAD_LEN 0x3E0
3053 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3054 struct sk_buff *skb)
3056 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3057 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3059 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3061 if (adapter->link_duplex != HALF_DUPLEX)
3062 goto no_fifo_stall_required;
3064 if (atomic_read(&adapter->tx_fifo_stall))
3067 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3068 atomic_set(&adapter->tx_fifo_stall, 1);
3072 no_fifo_stall_required:
3073 adapter->tx_fifo_head += skb_fifo_len;
3074 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3075 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3079 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3081 struct e1000_adapter *adapter = netdev_priv(netdev);
3082 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3084 netif_stop_queue(netdev);
3085 /* Herbert's original patch had:
3086 * smp_mb__after_netif_stop_queue();
3087 * but since that doesn't exist yet, just open code it. */
3090 /* We need to check again in a case another CPU has just
3091 * made room available. */
3092 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3096 netif_start_queue(netdev);
3097 ++adapter->restart_queue;
3101 static int e1000_maybe_stop_tx(struct net_device *netdev,
3102 struct e1000_tx_ring *tx_ring, int size)
3104 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3106 return __e1000_maybe_stop_tx(netdev, size);
3109 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3110 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3111 struct net_device *netdev)
3113 struct e1000_adapter *adapter = netdev_priv(netdev);
3114 struct e1000_hw *hw = &adapter->hw;
3115 struct e1000_tx_ring *tx_ring;
3116 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3117 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3118 unsigned int tx_flags = 0;
3119 unsigned int len = skb_headlen(skb);
3120 unsigned int nr_frags;
3126 /* This goes back to the question of how to logically map a tx queue
3127 * to a flow. Right now, performance is impacted slightly negatively
3128 * if using multiple tx queues. If the stack breaks away from a
3129 * single qdisc implementation, we can look at this again. */
3130 tx_ring = adapter->tx_ring;
3132 if (unlikely(skb->len <= 0)) {
3133 dev_kfree_skb_any(skb);
3134 return NETDEV_TX_OK;
3137 mss = skb_shinfo(skb)->gso_size;
3138 /* The controller does a simple calculation to
3139 * make sure there is enough room in the FIFO before
3140 * initiating the DMA for each buffer. The calc is:
3141 * 4 = ceil(buffer len/mss). To make sure we don't
3142 * overrun the FIFO, adjust the max buffer len if mss
3146 max_per_txd = min(mss << 2, max_per_txd);
3147 max_txd_pwr = fls(max_per_txd) - 1;
3149 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3150 if (skb->data_len && hdr_len == len) {
3151 switch (hw->mac_type) {
3152 unsigned int pull_size;
3154 /* Make sure we have room to chop off 4 bytes,
3155 * and that the end alignment will work out to
3156 * this hardware's requirements
3157 * NOTE: this is a TSO only workaround
3158 * if end byte alignment not correct move us
3159 * into the next dword */
3160 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3163 pull_size = min((unsigned int)4, skb->data_len);
3164 if (!__pskb_pull_tail(skb, pull_size)) {
3165 e_err(drv, "__pskb_pull_tail "
3167 dev_kfree_skb_any(skb);
3168 return NETDEV_TX_OK;
3170 len = skb_headlen(skb);
3179 /* reserve a descriptor for the offload context */
3180 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3184 /* Controller Erratum workaround */
3185 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3188 count += TXD_USE_COUNT(len, max_txd_pwr);
3190 if (adapter->pcix_82544)
3193 /* work-around for errata 10 and it applies to all controllers
3194 * in PCI-X mode, so add one more descriptor to the count
3196 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3200 nr_frags = skb_shinfo(skb)->nr_frags;
3201 for (f = 0; f < nr_frags; f++)
3202 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3204 if (adapter->pcix_82544)
3207 /* need: count + 2 desc gap to keep tail from touching
3208 * head, otherwise try next time */
3209 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3210 return NETDEV_TX_BUSY;
3212 if (unlikely((hw->mac_type == e1000_82547) &&
3213 (e1000_82547_fifo_workaround(adapter, skb)))) {
3214 netif_stop_queue(netdev);
3215 if (!test_bit(__E1000_DOWN, &adapter->flags))
3216 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3217 return NETDEV_TX_BUSY;
3220 if (vlan_tx_tag_present(skb)) {
3221 tx_flags |= E1000_TX_FLAGS_VLAN;
3222 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3225 first = tx_ring->next_to_use;
3227 tso = e1000_tso(adapter, tx_ring, skb);
3229 dev_kfree_skb_any(skb);
3230 return NETDEV_TX_OK;
3234 if (likely(hw->mac_type != e1000_82544))
3235 tx_ring->last_tx_tso = true;
3236 tx_flags |= E1000_TX_FLAGS_TSO;
3237 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3238 tx_flags |= E1000_TX_FLAGS_CSUM;
3240 if (likely(skb->protocol == htons(ETH_P_IP)))
3241 tx_flags |= E1000_TX_FLAGS_IPV4;
3243 if (unlikely(skb->no_fcs))
3244 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3246 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3250 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3251 /* Make sure there is space in the ring for the next send. */
3252 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3255 dev_kfree_skb_any(skb);
3256 tx_ring->buffer_info[first].time_stamp = 0;
3257 tx_ring->next_to_use = first;
3260 return NETDEV_TX_OK;
3263 #define NUM_REGS 38 /* 1 based count */
3264 static void e1000_regdump(struct e1000_adapter *adapter)
3266 struct e1000_hw *hw = &adapter->hw;
3268 u32 *regs_buff = regs;
3271 static const char * const reg_name[] = {
3273 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3274 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3275 "TIDV", "TXDCTL", "TADV", "TARC0",
3276 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3278 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3279 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3280 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3283 regs_buff[0] = er32(CTRL);
3284 regs_buff[1] = er32(STATUS);
3286 regs_buff[2] = er32(RCTL);
3287 regs_buff[3] = er32(RDLEN);
3288 regs_buff[4] = er32(RDH);
3289 regs_buff[5] = er32(RDT);
3290 regs_buff[6] = er32(RDTR);
3292 regs_buff[7] = er32(TCTL);
3293 regs_buff[8] = er32(TDBAL);
3294 regs_buff[9] = er32(TDBAH);
3295 regs_buff[10] = er32(TDLEN);
3296 regs_buff[11] = er32(TDH);
3297 regs_buff[12] = er32(TDT);
3298 regs_buff[13] = er32(TIDV);
3299 regs_buff[14] = er32(TXDCTL);
3300 regs_buff[15] = er32(TADV);
3301 regs_buff[16] = er32(TARC0);
3303 regs_buff[17] = er32(TDBAL1);
3304 regs_buff[18] = er32(TDBAH1);
3305 regs_buff[19] = er32(TDLEN1);
3306 regs_buff[20] = er32(TDH1);
3307 regs_buff[21] = er32(TDT1);
3308 regs_buff[22] = er32(TXDCTL1);
3309 regs_buff[23] = er32(TARC1);
3310 regs_buff[24] = er32(CTRL_EXT);
3311 regs_buff[25] = er32(ERT);
3312 regs_buff[26] = er32(RDBAL0);
3313 regs_buff[27] = er32(RDBAH0);
3314 regs_buff[28] = er32(TDFH);
3315 regs_buff[29] = er32(TDFT);
3316 regs_buff[30] = er32(TDFHS);
3317 regs_buff[31] = er32(TDFTS);
3318 regs_buff[32] = er32(TDFPC);
3319 regs_buff[33] = er32(RDFH);
3320 regs_buff[34] = er32(RDFT);
3321 regs_buff[35] = er32(RDFHS);
3322 regs_buff[36] = er32(RDFTS);
3323 regs_buff[37] = er32(RDFPC);
3325 pr_info("Register dump\n");
3326 for (i = 0; i < NUM_REGS; i++)
3327 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3331 * e1000_dump: Print registers, tx ring and rx ring
3333 static void e1000_dump(struct e1000_adapter *adapter)
3335 /* this code doesn't handle multiple rings */
3336 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3337 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3340 if (!netif_msg_hw(adapter))
3343 /* Print Registers */
3344 e1000_regdump(adapter);
3349 pr_info("TX Desc ring0 dump\n");
3351 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3353 * Legacy Transmit Descriptor
3354 * +--------------------------------------------------------------+
3355 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3356 * +--------------------------------------------------------------+
3357 * 8 | Special | CSS | Status | CMD | CSO | Length |
3358 * +--------------------------------------------------------------+
3359 * 63 48 47 36 35 32 31 24 23 16 15 0
3361 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3362 * 63 48 47 40 39 32 31 16 15 8 7 0
3363 * +----------------------------------------------------------------+
3364 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3365 * +----------------------------------------------------------------+
3366 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3367 * +----------------------------------------------------------------+
3368 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3370 * Extended Data Descriptor (DTYP=0x1)
3371 * +----------------------------------------------------------------+
3372 * 0 | Buffer Address [63:0] |
3373 * +----------------------------------------------------------------+
3374 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3375 * +----------------------------------------------------------------+
3376 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3378 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3379 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3381 if (!netif_msg_tx_done(adapter))
3382 goto rx_ring_summary;
3384 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3385 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3386 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
3387 struct my_u { __le64 a; __le64 b; };
3388 struct my_u *u = (struct my_u *)tx_desc;
3391 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3393 else if (i == tx_ring->next_to_use)
3395 else if (i == tx_ring->next_to_clean)
3400 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3401 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3402 le64_to_cpu(u->a), le64_to_cpu(u->b),
3403 (u64)buffer_info->dma, buffer_info->length,
3404 buffer_info->next_to_watch,
3405 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3412 pr_info("\nRX Desc ring dump\n");
3414 /* Legacy Receive Descriptor Format
3416 * +-----------------------------------------------------+
3417 * | Buffer Address [63:0] |
3418 * +-----------------------------------------------------+
3419 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3420 * +-----------------------------------------------------+
3421 * 63 48 47 40 39 32 31 16 15 0
3423 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3425 if (!netif_msg_rx_status(adapter))
3428 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3429 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3430 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i];
3431 struct my_u { __le64 a; __le64 b; };
3432 struct my_u *u = (struct my_u *)rx_desc;
3435 if (i == rx_ring->next_to_use)
3437 else if (i == rx_ring->next_to_clean)
3442 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3443 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3444 (u64)buffer_info->dma, buffer_info->skb, type);
3447 /* dump the descriptor caches */
3449 pr_info("Rx descriptor cache in 64bit format\n");
3450 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3451 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3453 readl(adapter->hw.hw_addr + i+4),
3454 readl(adapter->hw.hw_addr + i),
3455 readl(adapter->hw.hw_addr + i+12),
3456 readl(adapter->hw.hw_addr + i+8));
3459 pr_info("Tx descriptor cache in 64bit format\n");
3460 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3461 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3463 readl(adapter->hw.hw_addr + i+4),
3464 readl(adapter->hw.hw_addr + i),
3465 readl(adapter->hw.hw_addr + i+12),
3466 readl(adapter->hw.hw_addr + i+8));
3473 * e1000_tx_timeout - Respond to a Tx Hang
3474 * @netdev: network interface device structure
3477 static void e1000_tx_timeout(struct net_device *netdev)
3479 struct e1000_adapter *adapter = netdev_priv(netdev);
3481 /* Do the reset outside of interrupt context */
3482 adapter->tx_timeout_count++;
3483 schedule_work(&adapter->reset_task);
3486 static void e1000_reset_task(struct work_struct *work)
3488 struct e1000_adapter *adapter =
3489 container_of(work, struct e1000_adapter, reset_task);
3491 if (test_bit(__E1000_DOWN, &adapter->flags))
3493 e_err(drv, "Reset adapter\n");
3494 e1000_reinit_safe(adapter);
3498 * e1000_get_stats - Get System Network Statistics
3499 * @netdev: network interface device structure
3501 * Returns the address of the device statistics structure.
3502 * The statistics are actually updated from the watchdog.
3505 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3507 /* only return the current stats */
3508 return &netdev->stats;
3512 * e1000_change_mtu - Change the Maximum Transfer Unit
3513 * @netdev: network interface device structure
3514 * @new_mtu: new value for maximum frame size
3516 * Returns 0 on success, negative on failure
3519 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3521 struct e1000_adapter *adapter = netdev_priv(netdev);
3522 struct e1000_hw *hw = &adapter->hw;
3523 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3525 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3526 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3527 e_err(probe, "Invalid MTU setting\n");
3531 /* Adapter-specific max frame size limits. */
3532 switch (hw->mac_type) {
3533 case e1000_undefined ... e1000_82542_rev2_1:
3534 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3535 e_err(probe, "Jumbo Frames not supported.\n");
3540 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3544 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3546 /* e1000_down has a dependency on max_frame_size */
3547 hw->max_frame_size = max_frame;
3548 if (netif_running(netdev))
3549 e1000_down(adapter);
3551 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3552 * means we reserve 2 more, this pushes us to allocate from the next
3554 * i.e. RXBUFFER_2048 --> size-4096 slab
3555 * however with the new *_jumbo_rx* routines, jumbo receives will use
3556 * fragmented skbs */
3558 if (max_frame <= E1000_RXBUFFER_2048)
3559 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3561 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3562 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3563 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3564 adapter->rx_buffer_len = PAGE_SIZE;
3567 /* adjust allocation if LPE protects us, and we aren't using SBP */
3568 if (!hw->tbi_compatibility_on &&
3569 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3570 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3571 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3573 pr_info("%s changing MTU from %d to %d\n",
3574 netdev->name, netdev->mtu, new_mtu);
3575 netdev->mtu = new_mtu;
3577 if (netif_running(netdev))
3580 e1000_reset(adapter);
3582 clear_bit(__E1000_RESETTING, &adapter->flags);
3588 * e1000_update_stats - Update the board statistics counters
3589 * @adapter: board private structure
3592 void e1000_update_stats(struct e1000_adapter *adapter)
3594 struct net_device *netdev = adapter->netdev;
3595 struct e1000_hw *hw = &adapter->hw;
3596 struct pci_dev *pdev = adapter->pdev;
3597 unsigned long flags;
3600 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3603 * Prevent stats update while adapter is being reset, or if the pci
3604 * connection is down.
3606 if (adapter->link_speed == 0)
3608 if (pci_channel_offline(pdev))
3611 spin_lock_irqsave(&adapter->stats_lock, flags);
3613 /* these counters are modified from e1000_tbi_adjust_stats,
3614 * called from the interrupt context, so they must only
3615 * be written while holding adapter->stats_lock
3618 adapter->stats.crcerrs += er32(CRCERRS);
3619 adapter->stats.gprc += er32(GPRC);
3620 adapter->stats.gorcl += er32(GORCL);
3621 adapter->stats.gorch += er32(GORCH);
3622 adapter->stats.bprc += er32(BPRC);
3623 adapter->stats.mprc += er32(MPRC);
3624 adapter->stats.roc += er32(ROC);
3626 adapter->stats.prc64 += er32(PRC64);
3627 adapter->stats.prc127 += er32(PRC127);
3628 adapter->stats.prc255 += er32(PRC255);
3629 adapter->stats.prc511 += er32(PRC511);
3630 adapter->stats.prc1023 += er32(PRC1023);
3631 adapter->stats.prc1522 += er32(PRC1522);
3633 adapter->stats.symerrs += er32(SYMERRS);
3634 adapter->stats.mpc += er32(MPC);
3635 adapter->stats.scc += er32(SCC);
3636 adapter->stats.ecol += er32(ECOL);
3637 adapter->stats.mcc += er32(MCC);
3638 adapter->stats.latecol += er32(LATECOL);
3639 adapter->stats.dc += er32(DC);
3640 adapter->stats.sec += er32(SEC);
3641 adapter->stats.rlec += er32(RLEC);
3642 adapter->stats.xonrxc += er32(XONRXC);
3643 adapter->stats.xontxc += er32(XONTXC);
3644 adapter->stats.xoffrxc += er32(XOFFRXC);
3645 adapter->stats.xofftxc += er32(XOFFTXC);
3646 adapter->stats.fcruc += er32(FCRUC);
3647 adapter->stats.gptc += er32(GPTC);
3648 adapter->stats.gotcl += er32(GOTCL);
3649 adapter->stats.gotch += er32(GOTCH);
3650 adapter->stats.rnbc += er32(RNBC);
3651 adapter->stats.ruc += er32(RUC);
3652 adapter->stats.rfc += er32(RFC);
3653 adapter->stats.rjc += er32(RJC);
3654 adapter->stats.torl += er32(TORL);
3655 adapter->stats.torh += er32(TORH);
3656 adapter->stats.totl += er32(TOTL);
3657 adapter->stats.toth += er32(TOTH);
3658 adapter->stats.tpr += er32(TPR);
3660 adapter->stats.ptc64 += er32(PTC64);
3661 adapter->stats.ptc127 += er32(PTC127);
3662 adapter->stats.ptc255 += er32(PTC255);
3663 adapter->stats.ptc511 += er32(PTC511);
3664 adapter->stats.ptc1023 += er32(PTC1023);
3665 adapter->stats.ptc1522 += er32(PTC1522);
3667 adapter->stats.mptc += er32(MPTC);
3668 adapter->stats.bptc += er32(BPTC);
3670 /* used for adaptive IFS */
3672 hw->tx_packet_delta = er32(TPT);
3673 adapter->stats.tpt += hw->tx_packet_delta;
3674 hw->collision_delta = er32(COLC);
3675 adapter->stats.colc += hw->collision_delta;
3677 if (hw->mac_type >= e1000_82543) {
3678 adapter->stats.algnerrc += er32(ALGNERRC);
3679 adapter->stats.rxerrc += er32(RXERRC);
3680 adapter->stats.tncrs += er32(TNCRS);
3681 adapter->stats.cexterr += er32(CEXTERR);
3682 adapter->stats.tsctc += er32(TSCTC);
3683 adapter->stats.tsctfc += er32(TSCTFC);
3686 /* Fill out the OS statistics structure */
3687 netdev->stats.multicast = adapter->stats.mprc;
3688 netdev->stats.collisions = adapter->stats.colc;
3692 /* RLEC on some newer hardware can be incorrect so build
3693 * our own version based on RUC and ROC */
3694 netdev->stats.rx_errors = adapter->stats.rxerrc +
3695 adapter->stats.crcerrs + adapter->stats.algnerrc +
3696 adapter->stats.ruc + adapter->stats.roc +
3697 adapter->stats.cexterr;
3698 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3699 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3700 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3701 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3702 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3705 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3706 netdev->stats.tx_errors = adapter->stats.txerrc;
3707 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3708 netdev->stats.tx_window_errors = adapter->stats.latecol;
3709 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3710 if (hw->bad_tx_carr_stats_fd &&
3711 adapter->link_duplex == FULL_DUPLEX) {
3712 netdev->stats.tx_carrier_errors = 0;
3713 adapter->stats.tncrs = 0;
3716 /* Tx Dropped needs to be maintained elsewhere */
3719 if (hw->media_type == e1000_media_type_copper) {
3720 if ((adapter->link_speed == SPEED_1000) &&
3721 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3722 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3723 adapter->phy_stats.idle_errors += phy_tmp;
3726 if ((hw->mac_type <= e1000_82546) &&
3727 (hw->phy_type == e1000_phy_m88) &&
3728 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3729 adapter->phy_stats.receive_errors += phy_tmp;
3732 /* Management Stats */
3733 if (hw->has_smbus) {
3734 adapter->stats.mgptc += er32(MGTPTC);
3735 adapter->stats.mgprc += er32(MGTPRC);
3736 adapter->stats.mgpdc += er32(MGTPDC);
3739 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3743 * e1000_intr - Interrupt Handler
3744 * @irq: interrupt number
3745 * @data: pointer to a network interface device structure
3748 static irqreturn_t e1000_intr(int irq, void *data)
3750 struct net_device *netdev = data;
3751 struct e1000_adapter *adapter = netdev_priv(netdev);
3752 struct e1000_hw *hw = &adapter->hw;
3753 u32 icr = er32(ICR);
3755 if (unlikely((!icr)))
3756 return IRQ_NONE; /* Not our interrupt */
3759 * we might have caused the interrupt, but the above
3760 * read cleared it, and just in case the driver is
3761 * down there is nothing to do so return handled
3763 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3766 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3767 hw->get_link_status = 1;
3768 /* guard against interrupt when we're going down */
3769 if (!test_bit(__E1000_DOWN, &adapter->flags))
3770 schedule_delayed_work(&adapter->watchdog_task, 1);
3773 /* disable interrupts, without the synchronize_irq bit */
3775 E1000_WRITE_FLUSH();
3777 if (likely(napi_schedule_prep(&adapter->napi))) {
3778 adapter->total_tx_bytes = 0;
3779 adapter->total_tx_packets = 0;
3780 adapter->total_rx_bytes = 0;
3781 adapter->total_rx_packets = 0;
3782 __napi_schedule(&adapter->napi);
3784 /* this really should not happen! if it does it is basically a
3785 * bug, but not a hard error, so enable ints and continue */
3786 if (!test_bit(__E1000_DOWN, &adapter->flags))
3787 e1000_irq_enable(adapter);
3794 * e1000_clean - NAPI Rx polling callback
3795 * @adapter: board private structure
3797 static int e1000_clean(struct napi_struct *napi, int budget)
3799 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3800 int tx_clean_complete = 0, work_done = 0;
3802 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3804 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3806 if (!tx_clean_complete)
3809 /* If budget not fully consumed, exit the polling mode */
3810 if (work_done < budget) {
3811 if (likely(adapter->itr_setting & 3))
3812 e1000_set_itr(adapter);
3813 napi_complete(napi);
3814 if (!test_bit(__E1000_DOWN, &adapter->flags))
3815 e1000_irq_enable(adapter);
3822 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3823 * @adapter: board private structure
3825 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3826 struct e1000_tx_ring *tx_ring)
3828 struct e1000_hw *hw = &adapter->hw;
3829 struct net_device *netdev = adapter->netdev;
3830 struct e1000_tx_desc *tx_desc, *eop_desc;
3831 struct e1000_buffer *buffer_info;
3832 unsigned int i, eop;
3833 unsigned int count = 0;
3834 unsigned int total_tx_bytes=0, total_tx_packets=0;
3836 i = tx_ring->next_to_clean;
3837 eop = tx_ring->buffer_info[i].next_to_watch;
3838 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3840 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3841 (count < tx_ring->count)) {
3842 bool cleaned = false;
3843 rmb(); /* read buffer_info after eop_desc */
3844 for ( ; !cleaned; count++) {
3845 tx_desc = E1000_TX_DESC(*tx_ring, i);
3846 buffer_info = &tx_ring->buffer_info[i];
3847 cleaned = (i == eop);
3850 total_tx_packets += buffer_info->segs;
3851 total_tx_bytes += buffer_info->bytecount;
3853 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3854 tx_desc->upper.data = 0;
3856 if (unlikely(++i == tx_ring->count)) i = 0;
3859 eop = tx_ring->buffer_info[i].next_to_watch;
3860 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3863 tx_ring->next_to_clean = i;
3865 #define TX_WAKE_THRESHOLD 32
3866 if (unlikely(count && netif_carrier_ok(netdev) &&
3867 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3868 /* Make sure that anybody stopping the queue after this
3869 * sees the new next_to_clean.
3873 if (netif_queue_stopped(netdev) &&
3874 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3875 netif_wake_queue(netdev);
3876 ++adapter->restart_queue;
3880 if (adapter->detect_tx_hung) {
3881 /* Detect a transmit hang in hardware, this serializes the
3882 * check with the clearing of time_stamp and movement of i */
3883 adapter->detect_tx_hung = false;
3884 if (tx_ring->buffer_info[eop].time_stamp &&
3885 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3886 (adapter->tx_timeout_factor * HZ)) &&
3887 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3889 /* detected Tx unit hang */
3890 e_err(drv, "Detected Tx Unit Hang\n"
3894 " next_to_use <%x>\n"
3895 " next_to_clean <%x>\n"
3896 "buffer_info[next_to_clean]\n"
3897 " time_stamp <%lx>\n"
3898 " next_to_watch <%x>\n"
3900 " next_to_watch.status <%x>\n",
3901 (unsigned long)((tx_ring - adapter->tx_ring) /
3902 sizeof(struct e1000_tx_ring)),
3903 readl(hw->hw_addr + tx_ring->tdh),
3904 readl(hw->hw_addr + tx_ring->tdt),
3905 tx_ring->next_to_use,
3906 tx_ring->next_to_clean,
3907 tx_ring->buffer_info[eop].time_stamp,
3910 eop_desc->upper.fields.status);
3911 e1000_dump(adapter);
3912 netif_stop_queue(netdev);
3915 adapter->total_tx_bytes += total_tx_bytes;
3916 adapter->total_tx_packets += total_tx_packets;
3917 netdev->stats.tx_bytes += total_tx_bytes;
3918 netdev->stats.tx_packets += total_tx_packets;
3919 return count < tx_ring->count;
3923 * e1000_rx_checksum - Receive Checksum Offload for 82543
3924 * @adapter: board private structure
3925 * @status_err: receive descriptor status and error fields
3926 * @csum: receive descriptor csum field
3927 * @sk_buff: socket buffer with received data
3930 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3931 u32 csum, struct sk_buff *skb)
3933 struct e1000_hw *hw = &adapter->hw;
3934 u16 status = (u16)status_err;
3935 u8 errors = (u8)(status_err >> 24);
3937 skb_checksum_none_assert(skb);
3939 /* 82543 or newer only */
3940 if (unlikely(hw->mac_type < e1000_82543)) return;
3941 /* Ignore Checksum bit is set */
3942 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3943 /* TCP/UDP checksum error bit is set */
3944 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3945 /* let the stack verify checksum errors */
3946 adapter->hw_csum_err++;
3949 /* TCP/UDP Checksum has not been calculated */
3950 if (!(status & E1000_RXD_STAT_TCPCS))
3953 /* It must be a TCP or UDP packet with a valid checksum */
3954 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3955 /* TCP checksum is good */
3956 skb->ip_summed = CHECKSUM_UNNECESSARY;
3958 adapter->hw_csum_good++;
3962 * e1000_consume_page - helper function
3964 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3969 skb->data_len += length;
3970 skb->truesize += PAGE_SIZE;
3974 * e1000_receive_skb - helper function to handle rx indications
3975 * @adapter: board private structure
3976 * @status: descriptor status field as written by hardware
3977 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3978 * @skb: pointer to sk_buff to be indicated to stack
3980 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3981 __le16 vlan, struct sk_buff *skb)
3983 skb->protocol = eth_type_trans(skb, adapter->netdev);
3985 if (status & E1000_RXD_STAT_VP) {
3986 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
3988 __vlan_hwaccel_put_tag(skb, vid);
3990 napi_gro_receive(&adapter->napi, skb);
3994 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3995 * @adapter: board private structure
3996 * @rx_ring: ring to clean
3997 * @work_done: amount of napi work completed this call
3998 * @work_to_do: max amount of work allowed for this call to do
4000 * the return value indicates whether actual cleaning was done, there
4001 * is no guarantee that everything was cleaned
4003 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
4004 struct e1000_rx_ring *rx_ring,
4005 int *work_done, int work_to_do)
4007 struct e1000_hw *hw = &adapter->hw;
4008 struct net_device *netdev = adapter->netdev;
4009 struct pci_dev *pdev = adapter->pdev;
4010 struct e1000_rx_desc *rx_desc, *next_rxd;
4011 struct e1000_buffer *buffer_info, *next_buffer;
4012 unsigned long irq_flags;
4015 int cleaned_count = 0;
4016 bool cleaned = false;
4017 unsigned int total_rx_bytes=0, total_rx_packets=0;
4019 i = rx_ring->next_to_clean;
4020 rx_desc = E1000_RX_DESC(*rx_ring, i);
4021 buffer_info = &rx_ring->buffer_info[i];
4023 while (rx_desc->status & E1000_RXD_STAT_DD) {
4024 struct sk_buff *skb;
4027 if (*work_done >= work_to_do)
4030 rmb(); /* read descriptor and rx_buffer_info after status DD */
4032 status = rx_desc->status;
4033 skb = buffer_info->skb;
4034 buffer_info->skb = NULL;
4036 if (++i == rx_ring->count) i = 0;
4037 next_rxd = E1000_RX_DESC(*rx_ring, i);
4040 next_buffer = &rx_ring->buffer_info[i];
4044 dma_unmap_page(&pdev->dev, buffer_info->dma,
4045 buffer_info->length, DMA_FROM_DEVICE);
4046 buffer_info->dma = 0;
4048 length = le16_to_cpu(rx_desc->length);
4050 /* errors is only valid for DD + EOP descriptors */
4051 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4052 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4053 u8 last_byte = *(skb->data + length - 1);
4054 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4056 spin_lock_irqsave(&adapter->stats_lock,
4058 e1000_tbi_adjust_stats(hw, &adapter->stats,
4060 spin_unlock_irqrestore(&adapter->stats_lock,
4064 /* recycle both page and skb */
4065 buffer_info->skb = skb;
4066 /* an error means any chain goes out the window
4068 if (rx_ring->rx_skb_top)
4069 dev_kfree_skb(rx_ring->rx_skb_top);
4070 rx_ring->rx_skb_top = NULL;
4075 #define rxtop rx_ring->rx_skb_top
4076 if (!(status & E1000_RXD_STAT_EOP)) {
4077 /* this descriptor is only the beginning (or middle) */
4079 /* this is the beginning of a chain */
4081 skb_fill_page_desc(rxtop, 0, buffer_info->page,
4084 /* this is the middle of a chain */
4085 skb_fill_page_desc(rxtop,
4086 skb_shinfo(rxtop)->nr_frags,
4087 buffer_info->page, 0, length);
4088 /* re-use the skb, only consumed the page */
4089 buffer_info->skb = skb;
4091 e1000_consume_page(buffer_info, rxtop, length);
4095 /* end of the chain */
4096 skb_fill_page_desc(rxtop,
4097 skb_shinfo(rxtop)->nr_frags,
4098 buffer_info->page, 0, length);
4099 /* re-use the current skb, we only consumed the
4101 buffer_info->skb = skb;
4104 e1000_consume_page(buffer_info, skb, length);
4106 /* no chain, got EOP, this buf is the packet
4107 * copybreak to save the put_page/alloc_page */
4108 if (length <= copybreak &&
4109 skb_tailroom(skb) >= length) {
4111 vaddr = kmap_atomic(buffer_info->page);
4112 memcpy(skb_tail_pointer(skb), vaddr, length);
4113 kunmap_atomic(vaddr);
4114 /* re-use the page, so don't erase
4115 * buffer_info->page */
4116 skb_put(skb, length);
4118 skb_fill_page_desc(skb, 0,
4119 buffer_info->page, 0,
4121 e1000_consume_page(buffer_info, skb,
4127 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4128 e1000_rx_checksum(adapter,
4130 ((u32)(rx_desc->errors) << 24),
4131 le16_to_cpu(rx_desc->csum), skb);
4133 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4134 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4135 pskb_trim(skb, skb->len - 4);
4138 /* eth type trans needs skb->data to point to something */
4139 if (!pskb_may_pull(skb, ETH_HLEN)) {
4140 e_err(drv, "pskb_may_pull failed.\n");
4145 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4148 rx_desc->status = 0;
4150 /* return some buffers to hardware, one at a time is too slow */
4151 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4152 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4156 /* use prefetched values */
4158 buffer_info = next_buffer;
4160 rx_ring->next_to_clean = i;
4162 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4164 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4166 adapter->total_rx_packets += total_rx_packets;
4167 adapter->total_rx_bytes += total_rx_bytes;
4168 netdev->stats.rx_bytes += total_rx_bytes;
4169 netdev->stats.rx_packets += total_rx_packets;
4174 * this should improve performance for small packets with large amounts
4175 * of reassembly being done in the stack
4177 static void e1000_check_copybreak(struct net_device *netdev,
4178 struct e1000_buffer *buffer_info,
4179 u32 length, struct sk_buff **skb)
4181 struct sk_buff *new_skb;
4183 if (length > copybreak)
4186 new_skb = netdev_alloc_skb_ip_align(netdev, length);
4190 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
4191 (*skb)->data - NET_IP_ALIGN,
4192 length + NET_IP_ALIGN);
4193 /* save the skb in buffer_info as good */
4194 buffer_info->skb = *skb;
4199 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4200 * @adapter: board private structure
4201 * @rx_ring: ring to clean
4202 * @work_done: amount of napi work completed this call
4203 * @work_to_do: max amount of work allowed for this call to do
4205 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4206 struct e1000_rx_ring *rx_ring,
4207 int *work_done, int work_to_do)
4209 struct e1000_hw *hw = &adapter->hw;
4210 struct net_device *netdev = adapter->netdev;
4211 struct pci_dev *pdev = adapter->pdev;
4212 struct e1000_rx_desc *rx_desc, *next_rxd;
4213 struct e1000_buffer *buffer_info, *next_buffer;
4214 unsigned long flags;
4217 int cleaned_count = 0;
4218 bool cleaned = false;
4219 unsigned int total_rx_bytes=0, total_rx_packets=0;
4221 i = rx_ring->next_to_clean;
4222 rx_desc = E1000_RX_DESC(*rx_ring, i);
4223 buffer_info = &rx_ring->buffer_info[i];
4225 while (rx_desc->status & E1000_RXD_STAT_DD) {
4226 struct sk_buff *skb;
4229 if (*work_done >= work_to_do)
4232 rmb(); /* read descriptor and rx_buffer_info after status DD */
4234 status = rx_desc->status;
4235 skb = buffer_info->skb;
4236 buffer_info->skb = NULL;
4238 prefetch(skb->data - NET_IP_ALIGN);
4240 if (++i == rx_ring->count) i = 0;
4241 next_rxd = E1000_RX_DESC(*rx_ring, i);
4244 next_buffer = &rx_ring->buffer_info[i];
4248 dma_unmap_single(&pdev->dev, buffer_info->dma,
4249 buffer_info->length, DMA_FROM_DEVICE);
4250 buffer_info->dma = 0;
4252 length = le16_to_cpu(rx_desc->length);
4253 /* !EOP means multiple descriptors were used to store a single
4254 * packet, if thats the case we need to toss it. In fact, we
4255 * to toss every packet with the EOP bit clear and the next
4256 * frame that _does_ have the EOP bit set, as it is by
4257 * definition only a frame fragment
4259 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4260 adapter->discarding = true;
4262 if (adapter->discarding) {
4263 /* All receives must fit into a single buffer */
4264 e_dbg("Receive packet consumed multiple buffers\n");
4266 buffer_info->skb = skb;
4267 if (status & E1000_RXD_STAT_EOP)
4268 adapter->discarding = false;
4272 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4273 u8 last_byte = *(skb->data + length - 1);
4274 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4276 spin_lock_irqsave(&adapter->stats_lock, flags);
4277 e1000_tbi_adjust_stats(hw, &adapter->stats,
4279 spin_unlock_irqrestore(&adapter->stats_lock,
4284 buffer_info->skb = skb;
4289 total_rx_bytes += (length - 4); /* don't count FCS */
4292 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4293 /* adjust length to remove Ethernet CRC, this must be
4294 * done after the TBI_ACCEPT workaround above
4298 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4300 skb_put(skb, length);
4302 /* Receive Checksum Offload */
4303 e1000_rx_checksum(adapter,
4305 ((u32)(rx_desc->errors) << 24),
4306 le16_to_cpu(rx_desc->csum), skb);
4308 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4311 rx_desc->status = 0;
4313 /* return some buffers to hardware, one at a time is too slow */
4314 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4315 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4319 /* use prefetched values */
4321 buffer_info = next_buffer;
4323 rx_ring->next_to_clean = i;
4325 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4327 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4329 adapter->total_rx_packets += total_rx_packets;
4330 adapter->total_rx_bytes += total_rx_bytes;
4331 netdev->stats.rx_bytes += total_rx_bytes;
4332 netdev->stats.rx_packets += total_rx_packets;
4337 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4338 * @adapter: address of board private structure
4339 * @rx_ring: pointer to receive ring structure
4340 * @cleaned_count: number of buffers to allocate this pass
4344 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4345 struct e1000_rx_ring *rx_ring, int cleaned_count)
4347 struct net_device *netdev = adapter->netdev;
4348 struct pci_dev *pdev = adapter->pdev;
4349 struct e1000_rx_desc *rx_desc;
4350 struct e1000_buffer *buffer_info;
4351 struct sk_buff *skb;
4353 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4355 i = rx_ring->next_to_use;
4356 buffer_info = &rx_ring->buffer_info[i];
4358 while (cleaned_count--) {
4359 skb = buffer_info->skb;
4365 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4366 if (unlikely(!skb)) {
4367 /* Better luck next round */
4368 adapter->alloc_rx_buff_failed++;
4372 /* Fix for errata 23, can't cross 64kB boundary */
4373 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4374 struct sk_buff *oldskb = skb;
4375 e_err(rx_err, "skb align check failed: %u bytes at "
4376 "%p\n", bufsz, skb->data);
4377 /* Try again, without freeing the previous */
4378 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4379 /* Failed allocation, critical failure */
4381 dev_kfree_skb(oldskb);
4382 adapter->alloc_rx_buff_failed++;
4386 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4389 dev_kfree_skb(oldskb);
4390 break; /* while (cleaned_count--) */
4393 /* Use new allocation */
4394 dev_kfree_skb(oldskb);
4396 buffer_info->skb = skb;
4397 buffer_info->length = adapter->rx_buffer_len;
4399 /* allocate a new page if necessary */
4400 if (!buffer_info->page) {
4401 buffer_info->page = alloc_page(GFP_ATOMIC);
4402 if (unlikely(!buffer_info->page)) {
4403 adapter->alloc_rx_buff_failed++;
4408 if (!buffer_info->dma) {
4409 buffer_info->dma = dma_map_page(&pdev->dev,
4410 buffer_info->page, 0,
4411 buffer_info->length,
4413 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4414 put_page(buffer_info->page);
4416 buffer_info->page = NULL;
4417 buffer_info->skb = NULL;
4418 buffer_info->dma = 0;
4419 adapter->alloc_rx_buff_failed++;
4420 break; /* while !buffer_info->skb */
4424 rx_desc = E1000_RX_DESC(*rx_ring, i);
4425 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4427 if (unlikely(++i == rx_ring->count))
4429 buffer_info = &rx_ring->buffer_info[i];
4432 if (likely(rx_ring->next_to_use != i)) {
4433 rx_ring->next_to_use = i;
4434 if (unlikely(i-- == 0))
4435 i = (rx_ring->count - 1);
4437 /* Force memory writes to complete before letting h/w
4438 * know there are new descriptors to fetch. (Only
4439 * applicable for weak-ordered memory model archs,
4440 * such as IA-64). */
4442 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4447 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4448 * @adapter: address of board private structure
4451 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4452 struct e1000_rx_ring *rx_ring,
4455 struct e1000_hw *hw = &adapter->hw;
4456 struct net_device *netdev = adapter->netdev;
4457 struct pci_dev *pdev = adapter->pdev;
4458 struct e1000_rx_desc *rx_desc;
4459 struct e1000_buffer *buffer_info;
4460 struct sk_buff *skb;
4462 unsigned int bufsz = adapter->rx_buffer_len;
4464 i = rx_ring->next_to_use;
4465 buffer_info = &rx_ring->buffer_info[i];
4467 while (cleaned_count--) {
4468 skb = buffer_info->skb;
4474 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4475 if (unlikely(!skb)) {
4476 /* Better luck next round */
4477 adapter->alloc_rx_buff_failed++;
4481 /* Fix for errata 23, can't cross 64kB boundary */
4482 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4483 struct sk_buff *oldskb = skb;
4484 e_err(rx_err, "skb align check failed: %u bytes at "
4485 "%p\n", bufsz, skb->data);
4486 /* Try again, without freeing the previous */
4487 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4488 /* Failed allocation, critical failure */
4490 dev_kfree_skb(oldskb);
4491 adapter->alloc_rx_buff_failed++;
4495 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4498 dev_kfree_skb(oldskb);
4499 adapter->alloc_rx_buff_failed++;
4500 break; /* while !buffer_info->skb */
4503 /* Use new allocation */
4504 dev_kfree_skb(oldskb);
4506 buffer_info->skb = skb;
4507 buffer_info->length = adapter->rx_buffer_len;
4509 buffer_info->dma = dma_map_single(&pdev->dev,
4511 buffer_info->length,
4513 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4515 buffer_info->skb = NULL;
4516 buffer_info->dma = 0;
4517 adapter->alloc_rx_buff_failed++;
4518 break; /* while !buffer_info->skb */
4522 * XXX if it was allocated cleanly it will never map to a
4526 /* Fix for errata 23, can't cross 64kB boundary */
4527 if (!e1000_check_64k_bound(adapter,
4528 (void *)(unsigned long)buffer_info->dma,
4529 adapter->rx_buffer_len)) {
4530 e_err(rx_err, "dma align check failed: %u bytes at "
4531 "%p\n", adapter->rx_buffer_len,
4532 (void *)(unsigned long)buffer_info->dma);
4534 buffer_info->skb = NULL;
4536 dma_unmap_single(&pdev->dev, buffer_info->dma,
4537 adapter->rx_buffer_len,
4539 buffer_info->dma = 0;
4541 adapter->alloc_rx_buff_failed++;
4542 break; /* while !buffer_info->skb */
4544 rx_desc = E1000_RX_DESC(*rx_ring, i);
4545 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4547 if (unlikely(++i == rx_ring->count))
4549 buffer_info = &rx_ring->buffer_info[i];
4552 if (likely(rx_ring->next_to_use != i)) {
4553 rx_ring->next_to_use = i;
4554 if (unlikely(i-- == 0))
4555 i = (rx_ring->count - 1);
4557 /* Force memory writes to complete before letting h/w
4558 * know there are new descriptors to fetch. (Only
4559 * applicable for weak-ordered memory model archs,
4560 * such as IA-64). */
4562 writel(i, hw->hw_addr + rx_ring->rdt);
4567 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4571 static void e1000_smartspeed(struct e1000_adapter *adapter)
4573 struct e1000_hw *hw = &adapter->hw;
4577 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4578 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4581 if (adapter->smartspeed == 0) {
4582 /* If Master/Slave config fault is asserted twice,
4583 * we assume back-to-back */
4584 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4585 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4586 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4587 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4588 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4589 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4590 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4591 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4593 adapter->smartspeed++;
4594 if (!e1000_phy_setup_autoneg(hw) &&
4595 !e1000_read_phy_reg(hw, PHY_CTRL,
4597 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4598 MII_CR_RESTART_AUTO_NEG);
4599 e1000_write_phy_reg(hw, PHY_CTRL,
4604 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4605 /* If still no link, perhaps using 2/3 pair cable */
4606 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4607 phy_ctrl |= CR_1000T_MS_ENABLE;
4608 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4609 if (!e1000_phy_setup_autoneg(hw) &&
4610 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4611 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4612 MII_CR_RESTART_AUTO_NEG);
4613 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4616 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4617 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4618 adapter->smartspeed = 0;
4628 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4634 return e1000_mii_ioctl(netdev, ifr, cmd);
4647 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4650 struct e1000_adapter *adapter = netdev_priv(netdev);
4651 struct e1000_hw *hw = &adapter->hw;
4652 struct mii_ioctl_data *data = if_mii(ifr);
4655 unsigned long flags;
4657 if (hw->media_type != e1000_media_type_copper)
4662 data->phy_id = hw->phy_addr;
4665 spin_lock_irqsave(&adapter->stats_lock, flags);
4666 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4668 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4671 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4674 if (data->reg_num & ~(0x1F))
4676 mii_reg = data->val_in;
4677 spin_lock_irqsave(&adapter->stats_lock, flags);
4678 if (e1000_write_phy_reg(hw, data->reg_num,
4680 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4683 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4684 if (hw->media_type == e1000_media_type_copper) {
4685 switch (data->reg_num) {
4687 if (mii_reg & MII_CR_POWER_DOWN)
4689 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4691 hw->autoneg_advertised = 0x2F;
4696 else if (mii_reg & 0x2000)
4700 retval = e1000_set_spd_dplx(
4708 if (netif_running(adapter->netdev))
4709 e1000_reinit_locked(adapter);
4711 e1000_reset(adapter);
4713 case M88E1000_PHY_SPEC_CTRL:
4714 case M88E1000_EXT_PHY_SPEC_CTRL:
4715 if (e1000_phy_reset(hw))
4720 switch (data->reg_num) {
4722 if (mii_reg & MII_CR_POWER_DOWN)
4724 if (netif_running(adapter->netdev))
4725 e1000_reinit_locked(adapter);
4727 e1000_reset(adapter);
4735 return E1000_SUCCESS;
4738 void e1000_pci_set_mwi(struct e1000_hw *hw)
4740 struct e1000_adapter *adapter = hw->back;
4741 int ret_val = pci_set_mwi(adapter->pdev);
4744 e_err(probe, "Error in setting MWI\n");
4747 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4749 struct e1000_adapter *adapter = hw->back;
4751 pci_clear_mwi(adapter->pdev);
4754 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4756 struct e1000_adapter *adapter = hw->back;
4757 return pcix_get_mmrbc(adapter->pdev);
4760 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4762 struct e1000_adapter *adapter = hw->back;
4763 pcix_set_mmrbc(adapter->pdev, mmrbc);
4766 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4771 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4775 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4780 static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4781 netdev_features_t features)
4783 struct e1000_hw *hw = &adapter->hw;
4787 if (features & NETIF_F_HW_VLAN_RX) {
4788 /* enable VLAN tag insert/strip */
4789 ctrl |= E1000_CTRL_VME;
4791 /* disable VLAN tag insert/strip */
4792 ctrl &= ~E1000_CTRL_VME;
4796 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4799 struct e1000_hw *hw = &adapter->hw;
4802 if (!test_bit(__E1000_DOWN, &adapter->flags))
4803 e1000_irq_disable(adapter);
4805 __e1000_vlan_mode(adapter, adapter->netdev->features);
4807 /* enable VLAN receive filtering */
4809 rctl &= ~E1000_RCTL_CFIEN;
4810 if (!(adapter->netdev->flags & IFF_PROMISC))
4811 rctl |= E1000_RCTL_VFE;
4813 e1000_update_mng_vlan(adapter);
4815 /* disable VLAN receive filtering */
4817 rctl &= ~E1000_RCTL_VFE;
4821 if (!test_bit(__E1000_DOWN, &adapter->flags))
4822 e1000_irq_enable(adapter);
4825 static void e1000_vlan_mode(struct net_device *netdev,
4826 netdev_features_t features)
4828 struct e1000_adapter *adapter = netdev_priv(netdev);
4830 if (!test_bit(__E1000_DOWN, &adapter->flags))
4831 e1000_irq_disable(adapter);
4833 __e1000_vlan_mode(adapter, features);
4835 if (!test_bit(__E1000_DOWN, &adapter->flags))
4836 e1000_irq_enable(adapter);
4839 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4841 struct e1000_adapter *adapter = netdev_priv(netdev);
4842 struct e1000_hw *hw = &adapter->hw;
4845 if ((hw->mng_cookie.status &
4846 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4847 (vid == adapter->mng_vlan_id))
4850 if (!e1000_vlan_used(adapter))
4851 e1000_vlan_filter_on_off(adapter, true);
4853 /* add VID to filter table */
4854 index = (vid >> 5) & 0x7F;
4855 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4856 vfta |= (1 << (vid & 0x1F));
4857 e1000_write_vfta(hw, index, vfta);
4859 set_bit(vid, adapter->active_vlans);
4864 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4866 struct e1000_adapter *adapter = netdev_priv(netdev);
4867 struct e1000_hw *hw = &adapter->hw;
4870 if (!test_bit(__E1000_DOWN, &adapter->flags))
4871 e1000_irq_disable(adapter);
4872 if (!test_bit(__E1000_DOWN, &adapter->flags))
4873 e1000_irq_enable(adapter);
4875 /* remove VID from filter table */
4876 index = (vid >> 5) & 0x7F;
4877 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4878 vfta &= ~(1 << (vid & 0x1F));
4879 e1000_write_vfta(hw, index, vfta);
4881 clear_bit(vid, adapter->active_vlans);
4883 if (!e1000_vlan_used(adapter))
4884 e1000_vlan_filter_on_off(adapter, false);
4889 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4893 if (!e1000_vlan_used(adapter))
4896 e1000_vlan_filter_on_off(adapter, true);
4897 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4898 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4901 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4903 struct e1000_hw *hw = &adapter->hw;
4907 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4908 * for the switch() below to work */
4909 if ((spd & 1) || (dplx & ~1))
4912 /* Fiber NICs only allow 1000 gbps Full duplex */
4913 if ((hw->media_type == e1000_media_type_fiber) &&
4914 spd != SPEED_1000 &&
4915 dplx != DUPLEX_FULL)
4918 switch (spd + dplx) {
4919 case SPEED_10 + DUPLEX_HALF:
4920 hw->forced_speed_duplex = e1000_10_half;
4922 case SPEED_10 + DUPLEX_FULL:
4923 hw->forced_speed_duplex = e1000_10_full;
4925 case SPEED_100 + DUPLEX_HALF:
4926 hw->forced_speed_duplex = e1000_100_half;
4928 case SPEED_100 + DUPLEX_FULL:
4929 hw->forced_speed_duplex = e1000_100_full;
4931 case SPEED_1000 + DUPLEX_FULL:
4933 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4935 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4942 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4946 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4948 struct net_device *netdev = pci_get_drvdata(pdev);
4949 struct e1000_adapter *adapter = netdev_priv(netdev);
4950 struct e1000_hw *hw = &adapter->hw;
4951 u32 ctrl, ctrl_ext, rctl, status;
4952 u32 wufc = adapter->wol;
4957 netif_device_detach(netdev);
4959 if (netif_running(netdev)) {
4960 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4961 e1000_down(adapter);
4965 retval = pci_save_state(pdev);
4970 status = er32(STATUS);
4971 if (status & E1000_STATUS_LU)
4972 wufc &= ~E1000_WUFC_LNKC;
4975 e1000_setup_rctl(adapter);
4976 e1000_set_rx_mode(netdev);
4980 /* turn on all-multi mode if wake on multicast is enabled */
4981 if (wufc & E1000_WUFC_MC)
4982 rctl |= E1000_RCTL_MPE;
4984 /* enable receives in the hardware */
4985 ew32(RCTL, rctl | E1000_RCTL_EN);
4987 if (hw->mac_type >= e1000_82540) {
4989 /* advertise wake from D3Cold */
4990 #define E1000_CTRL_ADVD3WUC 0x00100000
4991 /* phy power management enable */
4992 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4993 ctrl |= E1000_CTRL_ADVD3WUC |
4994 E1000_CTRL_EN_PHY_PWR_MGMT;
4998 if (hw->media_type == e1000_media_type_fiber ||
4999 hw->media_type == e1000_media_type_internal_serdes) {
5000 /* keep the laser running in D3 */
5001 ctrl_ext = er32(CTRL_EXT);
5002 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5003 ew32(CTRL_EXT, ctrl_ext);
5006 ew32(WUC, E1000_WUC_PME_EN);
5013 e1000_release_manageability(adapter);
5015 *enable_wake = !!wufc;
5017 /* make sure adapter isn't asleep if manageability is enabled */
5018 if (adapter->en_mng_pt)
5019 *enable_wake = true;
5021 if (netif_running(netdev))
5022 e1000_free_irq(adapter);
5024 pci_disable_device(pdev);
5030 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5035 retval = __e1000_shutdown(pdev, &wake);
5040 pci_prepare_to_sleep(pdev);
5042 pci_wake_from_d3(pdev, false);
5043 pci_set_power_state(pdev, PCI_D3hot);
5049 static int e1000_resume(struct pci_dev *pdev)
5051 struct net_device *netdev = pci_get_drvdata(pdev);
5052 struct e1000_adapter *adapter = netdev_priv(netdev);
5053 struct e1000_hw *hw = &adapter->hw;
5056 pci_set_power_state(pdev, PCI_D0);
5057 pci_restore_state(pdev);
5058 pci_save_state(pdev);
5060 if (adapter->need_ioport)
5061 err = pci_enable_device(pdev);
5063 err = pci_enable_device_mem(pdev);
5065 pr_err("Cannot enable PCI device from suspend\n");
5068 pci_set_master(pdev);
5070 pci_enable_wake(pdev, PCI_D3hot, 0);
5071 pci_enable_wake(pdev, PCI_D3cold, 0);
5073 if (netif_running(netdev)) {
5074 err = e1000_request_irq(adapter);
5079 e1000_power_up_phy(adapter);
5080 e1000_reset(adapter);
5083 e1000_init_manageability(adapter);
5085 if (netif_running(netdev))
5088 netif_device_attach(netdev);
5094 static void e1000_shutdown(struct pci_dev *pdev)
5098 __e1000_shutdown(pdev, &wake);
5100 if (system_state == SYSTEM_POWER_OFF) {
5101 pci_wake_from_d3(pdev, wake);
5102 pci_set_power_state(pdev, PCI_D3hot);
5106 #ifdef CONFIG_NET_POLL_CONTROLLER
5108 * Polling 'interrupt' - used by things like netconsole to send skbs
5109 * without having to re-enable interrupts. It's not called while
5110 * the interrupt routine is executing.
5112 static void e1000_netpoll(struct net_device *netdev)
5114 struct e1000_adapter *adapter = netdev_priv(netdev);
5116 disable_irq(adapter->pdev->irq);
5117 e1000_intr(adapter->pdev->irq, netdev);
5118 enable_irq(adapter->pdev->irq);
5123 * e1000_io_error_detected - called when PCI error is detected
5124 * @pdev: Pointer to PCI device
5125 * @state: The current pci connection state
5127 * This function is called after a PCI bus error affecting
5128 * this device has been detected.
5130 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5131 pci_channel_state_t state)
5133 struct net_device *netdev = pci_get_drvdata(pdev);
5134 struct e1000_adapter *adapter = netdev_priv(netdev);
5136 netif_device_detach(netdev);
5138 if (state == pci_channel_io_perm_failure)
5139 return PCI_ERS_RESULT_DISCONNECT;
5141 if (netif_running(netdev))
5142 e1000_down(adapter);
5143 pci_disable_device(pdev);
5145 /* Request a slot slot reset. */
5146 return PCI_ERS_RESULT_NEED_RESET;
5150 * e1000_io_slot_reset - called after the pci bus has been reset.
5151 * @pdev: Pointer to PCI device
5153 * Restart the card from scratch, as if from a cold-boot. Implementation
5154 * resembles the first-half of the e1000_resume routine.
5156 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5158 struct net_device *netdev = pci_get_drvdata(pdev);
5159 struct e1000_adapter *adapter = netdev_priv(netdev);
5160 struct e1000_hw *hw = &adapter->hw;
5163 if (adapter->need_ioport)
5164 err = pci_enable_device(pdev);
5166 err = pci_enable_device_mem(pdev);
5168 pr_err("Cannot re-enable PCI device after reset.\n");
5169 return PCI_ERS_RESULT_DISCONNECT;
5171 pci_set_master(pdev);
5173 pci_enable_wake(pdev, PCI_D3hot, 0);
5174 pci_enable_wake(pdev, PCI_D3cold, 0);
5176 e1000_reset(adapter);
5179 return PCI_ERS_RESULT_RECOVERED;
5183 * e1000_io_resume - called when traffic can start flowing again.
5184 * @pdev: Pointer to PCI device
5186 * This callback is called when the error recovery driver tells us that
5187 * its OK to resume normal operation. Implementation resembles the
5188 * second-half of the e1000_resume routine.
5190 static void e1000_io_resume(struct pci_dev *pdev)
5192 struct net_device *netdev = pci_get_drvdata(pdev);
5193 struct e1000_adapter *adapter = netdev_priv(netdev);
5195 e1000_init_manageability(adapter);
5197 if (netif_running(netdev)) {
5198 if (e1000_up(adapter)) {
5199 pr_info("can't bring device back up after reset\n");
5204 netif_device_attach(netdev);