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 int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
168 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
169 static void e1000_restore_vlan(struct e1000_adapter *adapter);
172 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
173 static int e1000_resume(struct pci_dev *pdev);
175 static void e1000_shutdown(struct pci_dev *pdev);
177 #ifdef CONFIG_NET_POLL_CONTROLLER
178 /* for netdump / net console */
179 static void e1000_netpoll (struct net_device *netdev);
182 #define COPYBREAK_DEFAULT 256
183 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
184 module_param(copybreak, uint, 0644);
185 MODULE_PARM_DESC(copybreak,
186 "Maximum size of packet that is copied to a new buffer on receive");
188 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
189 pci_channel_state_t state);
190 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
191 static void e1000_io_resume(struct pci_dev *pdev);
193 static struct pci_error_handlers e1000_err_handler = {
194 .error_detected = e1000_io_error_detected,
195 .slot_reset = e1000_io_slot_reset,
196 .resume = e1000_io_resume,
199 static struct pci_driver e1000_driver = {
200 .name = e1000_driver_name,
201 .id_table = e1000_pci_tbl,
202 .probe = e1000_probe,
203 .remove = __devexit_p(e1000_remove),
205 /* Power Management Hooks */
206 .suspend = e1000_suspend,
207 .resume = e1000_resume,
209 .shutdown = e1000_shutdown,
210 .err_handler = &e1000_err_handler
213 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
214 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
215 MODULE_LICENSE("GPL");
216 MODULE_VERSION(DRV_VERSION);
218 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
219 module_param(debug, int, 0);
220 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
223 * e1000_get_hw_dev - return device
224 * used by hardware layer to print debugging information
227 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
229 struct e1000_adapter *adapter = hw->back;
230 return adapter->netdev;
234 * e1000_init_module - Driver Registration Routine
236 * e1000_init_module is the first routine called when the driver is
237 * loaded. All it does is register with the PCI subsystem.
240 static int __init e1000_init_module(void)
243 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
245 pr_info("%s\n", e1000_copyright);
247 ret = pci_register_driver(&e1000_driver);
248 if (copybreak != COPYBREAK_DEFAULT) {
250 pr_info("copybreak disabled\n");
252 pr_info("copybreak enabled for "
253 "packets <= %u bytes\n", copybreak);
258 module_init(e1000_init_module);
261 * e1000_exit_module - Driver Exit Cleanup Routine
263 * e1000_exit_module is called just before the driver is removed
267 static void __exit e1000_exit_module(void)
269 pci_unregister_driver(&e1000_driver);
272 module_exit(e1000_exit_module);
274 static int e1000_request_irq(struct e1000_adapter *adapter)
276 struct net_device *netdev = adapter->netdev;
277 irq_handler_t handler = e1000_intr;
278 int irq_flags = IRQF_SHARED;
281 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
284 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
290 static void e1000_free_irq(struct e1000_adapter *adapter)
292 struct net_device *netdev = adapter->netdev;
294 free_irq(adapter->pdev->irq, netdev);
298 * e1000_irq_disable - Mask off interrupt generation on the NIC
299 * @adapter: board private structure
302 static void e1000_irq_disable(struct e1000_adapter *adapter)
304 struct e1000_hw *hw = &adapter->hw;
308 synchronize_irq(adapter->pdev->irq);
312 * e1000_irq_enable - Enable default interrupt generation settings
313 * @adapter: board private structure
316 static void e1000_irq_enable(struct e1000_adapter *adapter)
318 struct e1000_hw *hw = &adapter->hw;
320 ew32(IMS, IMS_ENABLE_MASK);
324 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
326 struct e1000_hw *hw = &adapter->hw;
327 struct net_device *netdev = adapter->netdev;
328 u16 vid = hw->mng_cookie.vlan_id;
329 u16 old_vid = adapter->mng_vlan_id;
331 if (!e1000_vlan_used(adapter))
334 if (!test_bit(vid, adapter->active_vlans)) {
335 if (hw->mng_cookie.status &
336 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
337 e1000_vlan_rx_add_vid(netdev, vid);
338 adapter->mng_vlan_id = vid;
340 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
342 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
344 !test_bit(old_vid, adapter->active_vlans))
345 e1000_vlan_rx_kill_vid(netdev, old_vid);
347 adapter->mng_vlan_id = vid;
351 static void e1000_init_manageability(struct e1000_adapter *adapter)
353 struct e1000_hw *hw = &adapter->hw;
355 if (adapter->en_mng_pt) {
356 u32 manc = er32(MANC);
358 /* disable hardware interception of ARP */
359 manc &= ~(E1000_MANC_ARP_EN);
365 static void e1000_release_manageability(struct e1000_adapter *adapter)
367 struct e1000_hw *hw = &adapter->hw;
369 if (adapter->en_mng_pt) {
370 u32 manc = er32(MANC);
372 /* re-enable hardware interception of ARP */
373 manc |= E1000_MANC_ARP_EN;
380 * e1000_configure - configure the hardware for RX and TX
381 * @adapter = private board structure
383 static void e1000_configure(struct e1000_adapter *adapter)
385 struct net_device *netdev = adapter->netdev;
388 e1000_set_rx_mode(netdev);
390 e1000_restore_vlan(adapter);
391 e1000_init_manageability(adapter);
393 e1000_configure_tx(adapter);
394 e1000_setup_rctl(adapter);
395 e1000_configure_rx(adapter);
396 /* call E1000_DESC_UNUSED which always leaves
397 * at least 1 descriptor unused to make sure
398 * next_to_use != next_to_clean */
399 for (i = 0; i < adapter->num_rx_queues; i++) {
400 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
401 adapter->alloc_rx_buf(adapter, ring,
402 E1000_DESC_UNUSED(ring));
406 int e1000_up(struct e1000_adapter *adapter)
408 struct e1000_hw *hw = &adapter->hw;
410 /* hardware has been reset, we need to reload some things */
411 e1000_configure(adapter);
413 clear_bit(__E1000_DOWN, &adapter->flags);
415 napi_enable(&adapter->napi);
417 e1000_irq_enable(adapter);
419 netif_wake_queue(adapter->netdev);
421 /* fire a link change interrupt to start the watchdog */
422 ew32(ICS, E1000_ICS_LSC);
427 * e1000_power_up_phy - restore link in case the phy was powered down
428 * @adapter: address of board private structure
430 * The phy may be powered down to save power and turn off link when the
431 * driver is unloaded and wake on lan is not enabled (among others)
432 * *** this routine MUST be followed by a call to e1000_reset ***
436 void e1000_power_up_phy(struct e1000_adapter *adapter)
438 struct e1000_hw *hw = &adapter->hw;
441 /* Just clear the power down bit to wake the phy back up */
442 if (hw->media_type == e1000_media_type_copper) {
443 /* according to the manual, the phy will retain its
444 * settings across a power-down/up cycle */
445 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
446 mii_reg &= ~MII_CR_POWER_DOWN;
447 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
451 static void e1000_power_down_phy(struct e1000_adapter *adapter)
453 struct e1000_hw *hw = &adapter->hw;
455 /* Power down the PHY so no link is implied when interface is down *
456 * The PHY cannot be powered down if any of the following is true *
459 * (c) SoL/IDER session is active */
460 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
461 hw->media_type == e1000_media_type_copper) {
464 switch (hw->mac_type) {
467 case e1000_82545_rev_3:
470 case e1000_82546_rev_3:
472 case e1000_82541_rev_2:
474 case e1000_82547_rev_2:
475 if (er32(MANC) & E1000_MANC_SMBUS_EN)
481 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
482 mii_reg |= MII_CR_POWER_DOWN;
483 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
490 static void e1000_down_and_stop(struct e1000_adapter *adapter)
492 set_bit(__E1000_DOWN, &adapter->flags);
493 cancel_work_sync(&adapter->reset_task);
494 cancel_delayed_work_sync(&adapter->watchdog_task);
495 cancel_delayed_work_sync(&adapter->phy_info_task);
496 cancel_delayed_work_sync(&adapter->fifo_stall_task);
499 void e1000_down(struct e1000_adapter *adapter)
501 struct e1000_hw *hw = &adapter->hw;
502 struct net_device *netdev = adapter->netdev;
506 /* disable receives in the hardware */
508 ew32(RCTL, rctl & ~E1000_RCTL_EN);
509 /* flush and sleep below */
511 netif_tx_disable(netdev);
513 /* disable transmits in the hardware */
515 tctl &= ~E1000_TCTL_EN;
517 /* flush both disables and wait for them to finish */
521 napi_disable(&adapter->napi);
523 e1000_irq_disable(adapter);
526 * Setting DOWN must be after irq_disable to prevent
527 * a screaming interrupt. Setting DOWN also prevents
528 * tasks from rescheduling.
530 e1000_down_and_stop(adapter);
532 adapter->link_speed = 0;
533 adapter->link_duplex = 0;
534 netif_carrier_off(netdev);
536 e1000_reset(adapter);
537 e1000_clean_all_tx_rings(adapter);
538 e1000_clean_all_rx_rings(adapter);
541 static void e1000_reinit_safe(struct e1000_adapter *adapter)
543 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
545 mutex_lock(&adapter->mutex);
548 mutex_unlock(&adapter->mutex);
549 clear_bit(__E1000_RESETTING, &adapter->flags);
552 void e1000_reinit_locked(struct e1000_adapter *adapter)
554 /* if rtnl_lock is not held the call path is bogus */
556 WARN_ON(in_interrupt());
557 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
561 clear_bit(__E1000_RESETTING, &adapter->flags);
564 void e1000_reset(struct e1000_adapter *adapter)
566 struct e1000_hw *hw = &adapter->hw;
567 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
568 bool legacy_pba_adjust = false;
571 /* Repartition Pba for greater than 9k mtu
572 * To take effect CTRL.RST is required.
575 switch (hw->mac_type) {
576 case e1000_82542_rev2_0:
577 case e1000_82542_rev2_1:
582 case e1000_82541_rev_2:
583 legacy_pba_adjust = true;
587 case e1000_82545_rev_3:
590 case e1000_82546_rev_3:
594 case e1000_82547_rev_2:
595 legacy_pba_adjust = true;
598 case e1000_undefined:
603 if (legacy_pba_adjust) {
604 if (hw->max_frame_size > E1000_RXBUFFER_8192)
605 pba -= 8; /* allocate more FIFO for Tx */
607 if (hw->mac_type == e1000_82547) {
608 adapter->tx_fifo_head = 0;
609 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
610 adapter->tx_fifo_size =
611 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
612 atomic_set(&adapter->tx_fifo_stall, 0);
614 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
615 /* adjust PBA for jumbo frames */
618 /* To maintain wire speed transmits, the Tx FIFO should be
619 * large enough to accommodate two full transmit packets,
620 * rounded up to the next 1KB and expressed in KB. Likewise,
621 * the Rx FIFO should be large enough to accommodate at least
622 * one full receive packet and is similarly rounded up and
623 * expressed in KB. */
625 /* upper 16 bits has Tx packet buffer allocation size in KB */
626 tx_space = pba >> 16;
627 /* lower 16 bits has Rx packet buffer allocation size in KB */
630 * the tx fifo also stores 16 bytes of information about the tx
631 * but don't include ethernet FCS because hardware appends it
633 min_tx_space = (hw->max_frame_size +
634 sizeof(struct e1000_tx_desc) -
636 min_tx_space = ALIGN(min_tx_space, 1024);
638 /* software strips receive CRC, so leave room for it */
639 min_rx_space = hw->max_frame_size;
640 min_rx_space = ALIGN(min_rx_space, 1024);
643 /* If current Tx allocation is less than the min Tx FIFO size,
644 * and the min Tx FIFO size is less than the current Rx FIFO
645 * allocation, take space away from current Rx allocation */
646 if (tx_space < min_tx_space &&
647 ((min_tx_space - tx_space) < pba)) {
648 pba = pba - (min_tx_space - tx_space);
650 /* PCI/PCIx hardware has PBA alignment constraints */
651 switch (hw->mac_type) {
652 case e1000_82545 ... e1000_82546_rev_3:
653 pba &= ~(E1000_PBA_8K - 1);
659 /* if short on rx space, rx wins and must trump tx
660 * adjustment or use Early Receive if available */
661 if (pba < min_rx_space)
669 * flow control settings:
670 * The high water mark must be low enough to fit one full frame
671 * (or the size used for early receive) above it in the Rx FIFO.
672 * Set it to the lower of:
673 * - 90% of the Rx FIFO size, and
674 * - the full Rx FIFO size minus the early receive size (for parts
675 * with ERT support assuming ERT set to E1000_ERT_2048), or
676 * - the full Rx FIFO size minus one full frame
678 hwm = min(((pba << 10) * 9 / 10),
679 ((pba << 10) - hw->max_frame_size));
681 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
682 hw->fc_low_water = hw->fc_high_water - 8;
683 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
685 hw->fc = hw->original_fc;
687 /* Allow time for pending master requests to run */
689 if (hw->mac_type >= e1000_82544)
692 if (e1000_init_hw(hw))
693 e_dev_err("Hardware Error\n");
694 e1000_update_mng_vlan(adapter);
696 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
697 if (hw->mac_type >= e1000_82544 &&
699 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
700 u32 ctrl = er32(CTRL);
701 /* clear phy power management bit if we are in gig only mode,
702 * which if enabled will attempt negotiation to 100Mb, which
703 * can cause a loss of link at power off or driver unload */
704 ctrl &= ~E1000_CTRL_SWDPIN3;
708 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
709 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
711 e1000_reset_adaptive(hw);
712 e1000_phy_get_info(hw, &adapter->phy_info);
714 e1000_release_manageability(adapter);
718 * Dump the eeprom for users having checksum issues
720 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
722 struct net_device *netdev = adapter->netdev;
723 struct ethtool_eeprom eeprom;
724 const struct ethtool_ops *ops = netdev->ethtool_ops;
727 u16 csum_old, csum_new = 0;
729 eeprom.len = ops->get_eeprom_len(netdev);
732 data = kmalloc(eeprom.len, GFP_KERNEL);
736 ops->get_eeprom(netdev, &eeprom, data);
738 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
739 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
740 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
741 csum_new += data[i] + (data[i + 1] << 8);
742 csum_new = EEPROM_SUM - csum_new;
744 pr_err("/*********************/\n");
745 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
746 pr_err("Calculated : 0x%04x\n", csum_new);
748 pr_err("Offset Values\n");
749 pr_err("======== ======\n");
750 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
752 pr_err("Include this output when contacting your support provider.\n");
753 pr_err("This is not a software error! Something bad happened to\n");
754 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
755 pr_err("result in further problems, possibly loss of data,\n");
756 pr_err("corruption or system hangs!\n");
757 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
758 pr_err("which is invalid and requires you to set the proper MAC\n");
759 pr_err("address manually before continuing to enable this network\n");
760 pr_err("device. Please inspect the EEPROM dump and report the\n");
761 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
762 pr_err("/*********************/\n");
768 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
769 * @pdev: PCI device information struct
771 * Return true if an adapter needs ioport resources
773 static int e1000_is_need_ioport(struct pci_dev *pdev)
775 switch (pdev->device) {
776 case E1000_DEV_ID_82540EM:
777 case E1000_DEV_ID_82540EM_LOM:
778 case E1000_DEV_ID_82540EP:
779 case E1000_DEV_ID_82540EP_LOM:
780 case E1000_DEV_ID_82540EP_LP:
781 case E1000_DEV_ID_82541EI:
782 case E1000_DEV_ID_82541EI_MOBILE:
783 case E1000_DEV_ID_82541ER:
784 case E1000_DEV_ID_82541ER_LOM:
785 case E1000_DEV_ID_82541GI:
786 case E1000_DEV_ID_82541GI_LF:
787 case E1000_DEV_ID_82541GI_MOBILE:
788 case E1000_DEV_ID_82544EI_COPPER:
789 case E1000_DEV_ID_82544EI_FIBER:
790 case E1000_DEV_ID_82544GC_COPPER:
791 case E1000_DEV_ID_82544GC_LOM:
792 case E1000_DEV_ID_82545EM_COPPER:
793 case E1000_DEV_ID_82545EM_FIBER:
794 case E1000_DEV_ID_82546EB_COPPER:
795 case E1000_DEV_ID_82546EB_FIBER:
796 case E1000_DEV_ID_82546EB_QUAD_COPPER:
803 static netdev_features_t e1000_fix_features(struct net_device *netdev,
804 netdev_features_t features)
807 * Since there is no support for separate rx/tx vlan accel
808 * enable/disable make sure tx flag is always in same state as rx.
810 if (features & NETIF_F_HW_VLAN_RX)
811 features |= NETIF_F_HW_VLAN_TX;
813 features &= ~NETIF_F_HW_VLAN_TX;
818 static int e1000_set_features(struct net_device *netdev,
819 netdev_features_t features)
821 struct e1000_adapter *adapter = netdev_priv(netdev);
822 netdev_features_t changed = features ^ netdev->features;
824 if (changed & NETIF_F_HW_VLAN_RX)
825 e1000_vlan_mode(netdev, features);
827 if (!(changed & NETIF_F_RXCSUM))
830 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
832 if (netif_running(netdev))
833 e1000_reinit_locked(adapter);
835 e1000_reset(adapter);
840 static const struct net_device_ops e1000_netdev_ops = {
841 .ndo_open = e1000_open,
842 .ndo_stop = e1000_close,
843 .ndo_start_xmit = e1000_xmit_frame,
844 .ndo_get_stats = e1000_get_stats,
845 .ndo_set_rx_mode = e1000_set_rx_mode,
846 .ndo_set_mac_address = e1000_set_mac,
847 .ndo_tx_timeout = e1000_tx_timeout,
848 .ndo_change_mtu = e1000_change_mtu,
849 .ndo_do_ioctl = e1000_ioctl,
850 .ndo_validate_addr = eth_validate_addr,
851 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
852 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
853 #ifdef CONFIG_NET_POLL_CONTROLLER
854 .ndo_poll_controller = e1000_netpoll,
856 .ndo_fix_features = e1000_fix_features,
857 .ndo_set_features = e1000_set_features,
861 * e1000_init_hw_struct - initialize members of hw struct
862 * @adapter: board private struct
863 * @hw: structure used by e1000_hw.c
865 * Factors out initialization of the e1000_hw struct to its own function
866 * that can be called very early at init (just after struct allocation).
867 * Fields are initialized based on PCI device information and
868 * OS network device settings (MTU size).
869 * Returns negative error codes if MAC type setup fails.
871 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
874 struct pci_dev *pdev = adapter->pdev;
876 /* PCI config space info */
877 hw->vendor_id = pdev->vendor;
878 hw->device_id = pdev->device;
879 hw->subsystem_vendor_id = pdev->subsystem_vendor;
880 hw->subsystem_id = pdev->subsystem_device;
881 hw->revision_id = pdev->revision;
883 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
885 hw->max_frame_size = adapter->netdev->mtu +
886 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
887 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
889 /* identify the MAC */
890 if (e1000_set_mac_type(hw)) {
891 e_err(probe, "Unknown MAC Type\n");
895 switch (hw->mac_type) {
900 case e1000_82541_rev_2:
901 case e1000_82547_rev_2:
902 hw->phy_init_script = 1;
906 e1000_set_media_type(hw);
907 e1000_get_bus_info(hw);
909 hw->wait_autoneg_complete = false;
910 hw->tbi_compatibility_en = true;
911 hw->adaptive_ifs = true;
915 if (hw->media_type == e1000_media_type_copper) {
916 hw->mdix = AUTO_ALL_MODES;
917 hw->disable_polarity_correction = false;
918 hw->master_slave = E1000_MASTER_SLAVE;
925 * e1000_probe - Device Initialization Routine
926 * @pdev: PCI device information struct
927 * @ent: entry in e1000_pci_tbl
929 * Returns 0 on success, negative on failure
931 * e1000_probe initializes an adapter identified by a pci_dev structure.
932 * The OS initialization, configuring of the adapter private structure,
933 * and a hardware reset occur.
935 static int __devinit e1000_probe(struct pci_dev *pdev,
936 const struct pci_device_id *ent)
938 struct net_device *netdev;
939 struct e1000_adapter *adapter;
942 static int cards_found = 0;
943 static int global_quad_port_a = 0; /* global ksp3 port a indication */
944 int i, err, pci_using_dac;
947 u16 eeprom_apme_mask = E1000_EEPROM_APME;
948 int bars, need_ioport;
950 /* do not allocate ioport bars when not needed */
951 need_ioport = e1000_is_need_ioport(pdev);
953 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
954 err = pci_enable_device(pdev);
956 bars = pci_select_bars(pdev, IORESOURCE_MEM);
957 err = pci_enable_device_mem(pdev);
962 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
966 pci_set_master(pdev);
967 err = pci_save_state(pdev);
969 goto err_alloc_etherdev;
972 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
974 goto err_alloc_etherdev;
976 SET_NETDEV_DEV(netdev, &pdev->dev);
978 pci_set_drvdata(pdev, netdev);
979 adapter = netdev_priv(netdev);
980 adapter->netdev = netdev;
981 adapter->pdev = pdev;
982 adapter->msg_enable = (1 << debug) - 1;
983 adapter->bars = bars;
984 adapter->need_ioport = need_ioport;
990 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
994 if (adapter->need_ioport) {
995 for (i = BAR_1; i <= BAR_5; i++) {
996 if (pci_resource_len(pdev, i) == 0)
998 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
999 hw->io_base = pci_resource_start(pdev, i);
1005 /* make ready for any if (hw->...) below */
1006 err = e1000_init_hw_struct(adapter, hw);
1011 * there is a workaround being applied below that limits
1012 * 64-bit DMA addresses to 64-bit hardware. There are some
1013 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1016 if ((hw->bus_type == e1000_bus_type_pcix) &&
1017 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
1019 * according to DMA-API-HOWTO, coherent calls will always
1020 * succeed if the set call did
1022 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
1025 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1027 pr_err("No usable DMA config, aborting\n");
1030 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1033 netdev->netdev_ops = &e1000_netdev_ops;
1034 e1000_set_ethtool_ops(netdev);
1035 netdev->watchdog_timeo = 5 * HZ;
1036 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1038 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1040 adapter->bd_number = cards_found;
1042 /* setup the private structure */
1044 err = e1000_sw_init(adapter);
1049 if (hw->mac_type == e1000_ce4100) {
1050 hw->ce4100_gbe_mdio_base_virt =
1051 ioremap(pci_resource_start(pdev, BAR_1),
1052 pci_resource_len(pdev, BAR_1));
1054 if (!hw->ce4100_gbe_mdio_base_virt)
1055 goto err_mdio_ioremap;
1058 if (hw->mac_type >= e1000_82543) {
1059 netdev->hw_features = NETIF_F_SG |
1062 netdev->features = NETIF_F_HW_VLAN_TX |
1063 NETIF_F_HW_VLAN_FILTER;
1066 if ((hw->mac_type >= e1000_82544) &&
1067 (hw->mac_type != e1000_82547))
1068 netdev->hw_features |= NETIF_F_TSO;
1070 netdev->priv_flags |= IFF_SUPP_NOFCS;
1072 netdev->features |= netdev->hw_features;
1073 netdev->hw_features |= NETIF_F_RXCSUM;
1074 netdev->hw_features |= NETIF_F_RXFCS;
1076 if (pci_using_dac) {
1077 netdev->features |= NETIF_F_HIGHDMA;
1078 netdev->vlan_features |= NETIF_F_HIGHDMA;
1081 netdev->vlan_features |= NETIF_F_TSO;
1082 netdev->vlan_features |= NETIF_F_HW_CSUM;
1083 netdev->vlan_features |= NETIF_F_SG;
1085 netdev->priv_flags |= IFF_UNICAST_FLT;
1087 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1089 /* initialize eeprom parameters */
1090 if (e1000_init_eeprom_params(hw)) {
1091 e_err(probe, "EEPROM initialization failed\n");
1095 /* before reading the EEPROM, reset the controller to
1096 * put the device in a known good starting state */
1100 /* make sure the EEPROM is good */
1101 if (e1000_validate_eeprom_checksum(hw) < 0) {
1102 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1103 e1000_dump_eeprom(adapter);
1105 * set MAC address to all zeroes to invalidate and temporary
1106 * disable this device for the user. This blocks regular
1107 * traffic while still permitting ethtool ioctls from reaching
1108 * the hardware as well as allowing the user to run the
1109 * interface after manually setting a hw addr using
1112 memset(hw->mac_addr, 0, netdev->addr_len);
1114 /* copy the MAC address out of the EEPROM */
1115 if (e1000_read_mac_addr(hw))
1116 e_err(probe, "EEPROM Read Error\n");
1118 /* don't block initalization here due to bad MAC address */
1119 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1120 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1122 if (!is_valid_ether_addr(netdev->perm_addr))
1123 e_err(probe, "Invalid MAC Address\n");
1126 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1127 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1128 e1000_82547_tx_fifo_stall_task);
1129 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1130 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1132 e1000_check_options(adapter);
1134 /* Initial Wake on LAN setting
1135 * If APM wake is enabled in the EEPROM,
1136 * enable the ACPI Magic Packet filter
1139 switch (hw->mac_type) {
1140 case e1000_82542_rev2_0:
1141 case e1000_82542_rev2_1:
1145 e1000_read_eeprom(hw,
1146 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1147 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1150 case e1000_82546_rev_3:
1151 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1152 e1000_read_eeprom(hw,
1153 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1158 e1000_read_eeprom(hw,
1159 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1162 if (eeprom_data & eeprom_apme_mask)
1163 adapter->eeprom_wol |= E1000_WUFC_MAG;
1165 /* now that we have the eeprom settings, apply the special cases
1166 * where the eeprom may be wrong or the board simply won't support
1167 * wake on lan on a particular port */
1168 switch (pdev->device) {
1169 case E1000_DEV_ID_82546GB_PCIE:
1170 adapter->eeprom_wol = 0;
1172 case E1000_DEV_ID_82546EB_FIBER:
1173 case E1000_DEV_ID_82546GB_FIBER:
1174 /* Wake events only supported on port A for dual fiber
1175 * regardless of eeprom setting */
1176 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1177 adapter->eeprom_wol = 0;
1179 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1180 /* if quad port adapter, disable WoL on all but port A */
1181 if (global_quad_port_a != 0)
1182 adapter->eeprom_wol = 0;
1184 adapter->quad_port_a = true;
1185 /* Reset for multiple quad port adapters */
1186 if (++global_quad_port_a == 4)
1187 global_quad_port_a = 0;
1191 /* initialize the wol settings based on the eeprom settings */
1192 adapter->wol = adapter->eeprom_wol;
1193 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1195 /* Auto detect PHY address */
1196 if (hw->mac_type == e1000_ce4100) {
1197 for (i = 0; i < 32; i++) {
1199 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1200 if (tmp == 0 || tmp == 0xFF) {
1209 /* reset the hardware with the new settings */
1210 e1000_reset(adapter);
1212 strcpy(netdev->name, "eth%d");
1213 err = register_netdev(netdev);
1217 e1000_vlan_mode(netdev, netdev->features);
1219 /* print bus type/speed/width info */
1220 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1221 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1222 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1223 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1224 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1225 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1226 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1229 /* carrier off reporting is important to ethtool even BEFORE open */
1230 netif_carrier_off(netdev);
1232 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1239 e1000_phy_hw_reset(hw);
1241 if (hw->flash_address)
1242 iounmap(hw->flash_address);
1243 kfree(adapter->tx_ring);
1244 kfree(adapter->rx_ring);
1248 iounmap(hw->ce4100_gbe_mdio_base_virt);
1249 iounmap(hw->hw_addr);
1251 free_netdev(netdev);
1253 pci_release_selected_regions(pdev, bars);
1255 pci_disable_device(pdev);
1260 * e1000_remove - Device Removal Routine
1261 * @pdev: PCI device information struct
1263 * e1000_remove is called by the PCI subsystem to alert the driver
1264 * that it should release a PCI device. The could be caused by a
1265 * Hot-Plug event, or because the driver is going to be removed from
1269 static void __devexit e1000_remove(struct pci_dev *pdev)
1271 struct net_device *netdev = pci_get_drvdata(pdev);
1272 struct e1000_adapter *adapter = netdev_priv(netdev);
1273 struct e1000_hw *hw = &adapter->hw;
1275 e1000_down_and_stop(adapter);
1276 e1000_release_manageability(adapter);
1278 unregister_netdev(netdev);
1280 e1000_phy_hw_reset(hw);
1282 kfree(adapter->tx_ring);
1283 kfree(adapter->rx_ring);
1285 if (hw->mac_type == e1000_ce4100)
1286 iounmap(hw->ce4100_gbe_mdio_base_virt);
1287 iounmap(hw->hw_addr);
1288 if (hw->flash_address)
1289 iounmap(hw->flash_address);
1290 pci_release_selected_regions(pdev, adapter->bars);
1292 free_netdev(netdev);
1294 pci_disable_device(pdev);
1298 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1299 * @adapter: board private structure to initialize
1301 * e1000_sw_init initializes the Adapter private data structure.
1302 * e1000_init_hw_struct MUST be called before this function
1305 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1307 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1309 adapter->num_tx_queues = 1;
1310 adapter->num_rx_queues = 1;
1312 if (e1000_alloc_queues(adapter)) {
1313 e_err(probe, "Unable to allocate memory for queues\n");
1317 /* Explicitly disable IRQ since the NIC can be in any state. */
1318 e1000_irq_disable(adapter);
1320 spin_lock_init(&adapter->stats_lock);
1321 mutex_init(&adapter->mutex);
1323 set_bit(__E1000_DOWN, &adapter->flags);
1329 * e1000_alloc_queues - Allocate memory for all rings
1330 * @adapter: board private structure to initialize
1332 * We allocate one ring per queue at run-time since we don't know the
1333 * number of queues at compile-time.
1336 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1338 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1339 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1340 if (!adapter->tx_ring)
1343 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1344 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1345 if (!adapter->rx_ring) {
1346 kfree(adapter->tx_ring);
1350 return E1000_SUCCESS;
1354 * e1000_open - Called when a network interface is made active
1355 * @netdev: network interface device structure
1357 * Returns 0 on success, negative value on failure
1359 * The open entry point is called when a network interface is made
1360 * active by the system (IFF_UP). At this point all resources needed
1361 * for transmit and receive operations are allocated, the interrupt
1362 * handler is registered with the OS, the watchdog task is started,
1363 * and the stack is notified that the interface is ready.
1366 static int e1000_open(struct net_device *netdev)
1368 struct e1000_adapter *adapter = netdev_priv(netdev);
1369 struct e1000_hw *hw = &adapter->hw;
1372 /* disallow open during test */
1373 if (test_bit(__E1000_TESTING, &adapter->flags))
1376 netif_carrier_off(netdev);
1378 /* allocate transmit descriptors */
1379 err = e1000_setup_all_tx_resources(adapter);
1383 /* allocate receive descriptors */
1384 err = e1000_setup_all_rx_resources(adapter);
1388 e1000_power_up_phy(adapter);
1390 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1391 if ((hw->mng_cookie.status &
1392 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1393 e1000_update_mng_vlan(adapter);
1396 /* before we allocate an interrupt, we must be ready to handle it.
1397 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1398 * as soon as we call pci_request_irq, so we have to setup our
1399 * clean_rx handler before we do so. */
1400 e1000_configure(adapter);
1402 err = e1000_request_irq(adapter);
1406 /* From here on the code is the same as e1000_up() */
1407 clear_bit(__E1000_DOWN, &adapter->flags);
1409 napi_enable(&adapter->napi);
1411 e1000_irq_enable(adapter);
1413 netif_start_queue(netdev);
1415 /* fire a link status change interrupt to start the watchdog */
1416 ew32(ICS, E1000_ICS_LSC);
1418 return E1000_SUCCESS;
1421 e1000_power_down_phy(adapter);
1422 e1000_free_all_rx_resources(adapter);
1424 e1000_free_all_tx_resources(adapter);
1426 e1000_reset(adapter);
1432 * e1000_close - Disables a network interface
1433 * @netdev: network interface device structure
1435 * Returns 0, this is not allowed to fail
1437 * The close entry point is called when an interface is de-activated
1438 * by the OS. The hardware is still under the drivers control, but
1439 * needs to be disabled. A global MAC reset is issued to stop the
1440 * hardware, and all transmit and receive resources are freed.
1443 static int e1000_close(struct net_device *netdev)
1445 struct e1000_adapter *adapter = netdev_priv(netdev);
1446 struct e1000_hw *hw = &adapter->hw;
1448 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1449 e1000_down(adapter);
1450 e1000_power_down_phy(adapter);
1451 e1000_free_irq(adapter);
1453 e1000_free_all_tx_resources(adapter);
1454 e1000_free_all_rx_resources(adapter);
1456 /* kill manageability vlan ID if supported, but not if a vlan with
1457 * the same ID is registered on the host OS (let 8021q kill it) */
1458 if ((hw->mng_cookie.status &
1459 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1460 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1461 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1468 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1469 * @adapter: address of board private structure
1470 * @start: address of beginning of memory
1471 * @len: length of memory
1473 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1476 struct e1000_hw *hw = &adapter->hw;
1477 unsigned long begin = (unsigned long)start;
1478 unsigned long end = begin + len;
1480 /* First rev 82545 and 82546 need to not allow any memory
1481 * write location to cross 64k boundary due to errata 23 */
1482 if (hw->mac_type == e1000_82545 ||
1483 hw->mac_type == e1000_ce4100 ||
1484 hw->mac_type == e1000_82546) {
1485 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1492 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1493 * @adapter: board private structure
1494 * @txdr: tx descriptor ring (for a specific queue) to setup
1496 * Return 0 on success, negative on failure
1499 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1500 struct e1000_tx_ring *txdr)
1502 struct pci_dev *pdev = adapter->pdev;
1505 size = sizeof(struct e1000_buffer) * txdr->count;
1506 txdr->buffer_info = vzalloc(size);
1507 if (!txdr->buffer_info) {
1508 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1513 /* round up to nearest 4K */
1515 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1516 txdr->size = ALIGN(txdr->size, 4096);
1518 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1522 vfree(txdr->buffer_info);
1523 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1528 /* Fix for errata 23, can't cross 64kB boundary */
1529 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1530 void *olddesc = txdr->desc;
1531 dma_addr_t olddma = txdr->dma;
1532 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1533 txdr->size, txdr->desc);
1534 /* Try again, without freeing the previous */
1535 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1536 &txdr->dma, GFP_KERNEL);
1537 /* Failed allocation, critical failure */
1539 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1541 goto setup_tx_desc_die;
1544 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1546 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1548 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1550 e_err(probe, "Unable to allocate aligned memory "
1551 "for the transmit descriptor ring\n");
1552 vfree(txdr->buffer_info);
1555 /* Free old allocation, new allocation was successful */
1556 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1560 memset(txdr->desc, 0, txdr->size);
1562 txdr->next_to_use = 0;
1563 txdr->next_to_clean = 0;
1569 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1570 * (Descriptors) for all queues
1571 * @adapter: board private structure
1573 * Return 0 on success, negative on failure
1576 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1580 for (i = 0; i < adapter->num_tx_queues; i++) {
1581 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1583 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1584 for (i-- ; i >= 0; i--)
1585 e1000_free_tx_resources(adapter,
1586 &adapter->tx_ring[i]);
1595 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1596 * @adapter: board private structure
1598 * Configure the Tx unit of the MAC after a reset.
1601 static void e1000_configure_tx(struct e1000_adapter *adapter)
1604 struct e1000_hw *hw = &adapter->hw;
1605 u32 tdlen, tctl, tipg;
1608 /* Setup the HW Tx Head and Tail descriptor pointers */
1610 switch (adapter->num_tx_queues) {
1613 tdba = adapter->tx_ring[0].dma;
1614 tdlen = adapter->tx_ring[0].count *
1615 sizeof(struct e1000_tx_desc);
1617 ew32(TDBAH, (tdba >> 32));
1618 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1621 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1622 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1626 /* Set the default values for the Tx Inter Packet Gap timer */
1627 if ((hw->media_type == e1000_media_type_fiber ||
1628 hw->media_type == e1000_media_type_internal_serdes))
1629 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1631 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1633 switch (hw->mac_type) {
1634 case e1000_82542_rev2_0:
1635 case e1000_82542_rev2_1:
1636 tipg = DEFAULT_82542_TIPG_IPGT;
1637 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1638 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1641 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1642 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1645 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1646 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1649 /* Set the Tx Interrupt Delay register */
1651 ew32(TIDV, adapter->tx_int_delay);
1652 if (hw->mac_type >= e1000_82540)
1653 ew32(TADV, adapter->tx_abs_int_delay);
1655 /* Program the Transmit Control Register */
1658 tctl &= ~E1000_TCTL_CT;
1659 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1660 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1662 e1000_config_collision_dist(hw);
1664 /* Setup Transmit Descriptor Settings for eop descriptor */
1665 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1667 /* only set IDE if we are delaying interrupts using the timers */
1668 if (adapter->tx_int_delay)
1669 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1671 if (hw->mac_type < e1000_82543)
1672 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1674 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1676 /* Cache if we're 82544 running in PCI-X because we'll
1677 * need this to apply a workaround later in the send path. */
1678 if (hw->mac_type == e1000_82544 &&
1679 hw->bus_type == e1000_bus_type_pcix)
1680 adapter->pcix_82544 = true;
1687 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1688 * @adapter: board private structure
1689 * @rxdr: rx descriptor ring (for a specific queue) to setup
1691 * Returns 0 on success, negative on failure
1694 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1695 struct e1000_rx_ring *rxdr)
1697 struct pci_dev *pdev = adapter->pdev;
1700 size = sizeof(struct e1000_buffer) * rxdr->count;
1701 rxdr->buffer_info = vzalloc(size);
1702 if (!rxdr->buffer_info) {
1703 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1708 desc_len = sizeof(struct e1000_rx_desc);
1710 /* Round up to nearest 4K */
1712 rxdr->size = rxdr->count * desc_len;
1713 rxdr->size = ALIGN(rxdr->size, 4096);
1715 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1719 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1722 vfree(rxdr->buffer_info);
1726 /* Fix for errata 23, can't cross 64kB boundary */
1727 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1728 void *olddesc = rxdr->desc;
1729 dma_addr_t olddma = rxdr->dma;
1730 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1731 rxdr->size, rxdr->desc);
1732 /* Try again, without freeing the previous */
1733 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1734 &rxdr->dma, GFP_KERNEL);
1735 /* Failed allocation, critical failure */
1737 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1739 e_err(probe, "Unable to allocate memory for the Rx "
1740 "descriptor ring\n");
1741 goto setup_rx_desc_die;
1744 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1746 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1748 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1750 e_err(probe, "Unable to allocate aligned memory for "
1751 "the Rx descriptor ring\n");
1752 goto setup_rx_desc_die;
1754 /* Free old allocation, new allocation was successful */
1755 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1759 memset(rxdr->desc, 0, rxdr->size);
1761 rxdr->next_to_clean = 0;
1762 rxdr->next_to_use = 0;
1763 rxdr->rx_skb_top = NULL;
1769 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1770 * (Descriptors) for all queues
1771 * @adapter: board private structure
1773 * Return 0 on success, negative on failure
1776 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1780 for (i = 0; i < adapter->num_rx_queues; i++) {
1781 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1783 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1784 for (i-- ; i >= 0; i--)
1785 e1000_free_rx_resources(adapter,
1786 &adapter->rx_ring[i]);
1795 * e1000_setup_rctl - configure the receive control registers
1796 * @adapter: Board private structure
1798 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1800 struct e1000_hw *hw = &adapter->hw;
1805 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1807 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1808 E1000_RCTL_RDMTS_HALF |
1809 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1811 if (hw->tbi_compatibility_on == 1)
1812 rctl |= E1000_RCTL_SBP;
1814 rctl &= ~E1000_RCTL_SBP;
1816 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1817 rctl &= ~E1000_RCTL_LPE;
1819 rctl |= E1000_RCTL_LPE;
1821 /* Setup buffer sizes */
1822 rctl &= ~E1000_RCTL_SZ_4096;
1823 rctl |= E1000_RCTL_BSEX;
1824 switch (adapter->rx_buffer_len) {
1825 case E1000_RXBUFFER_2048:
1827 rctl |= E1000_RCTL_SZ_2048;
1828 rctl &= ~E1000_RCTL_BSEX;
1830 case E1000_RXBUFFER_4096:
1831 rctl |= E1000_RCTL_SZ_4096;
1833 case E1000_RXBUFFER_8192:
1834 rctl |= E1000_RCTL_SZ_8192;
1836 case E1000_RXBUFFER_16384:
1837 rctl |= E1000_RCTL_SZ_16384;
1845 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1846 * @adapter: board private structure
1848 * Configure the Rx unit of the MAC after a reset.
1851 static void e1000_configure_rx(struct e1000_adapter *adapter)
1854 struct e1000_hw *hw = &adapter->hw;
1855 u32 rdlen, rctl, rxcsum;
1857 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1858 rdlen = adapter->rx_ring[0].count *
1859 sizeof(struct e1000_rx_desc);
1860 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1861 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1863 rdlen = adapter->rx_ring[0].count *
1864 sizeof(struct e1000_rx_desc);
1865 adapter->clean_rx = e1000_clean_rx_irq;
1866 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1869 /* disable receives while setting up the descriptors */
1871 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1873 /* set the Receive Delay Timer Register */
1874 ew32(RDTR, adapter->rx_int_delay);
1876 if (hw->mac_type >= e1000_82540) {
1877 ew32(RADV, adapter->rx_abs_int_delay);
1878 if (adapter->itr_setting != 0)
1879 ew32(ITR, 1000000000 / (adapter->itr * 256));
1882 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1883 * the Base and Length of the Rx Descriptor Ring */
1884 switch (adapter->num_rx_queues) {
1887 rdba = adapter->rx_ring[0].dma;
1889 ew32(RDBAH, (rdba >> 32));
1890 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1893 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1894 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1898 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1899 if (hw->mac_type >= e1000_82543) {
1900 rxcsum = er32(RXCSUM);
1901 if (adapter->rx_csum)
1902 rxcsum |= E1000_RXCSUM_TUOFL;
1904 /* don't need to clear IPPCSE as it defaults to 0 */
1905 rxcsum &= ~E1000_RXCSUM_TUOFL;
1906 ew32(RXCSUM, rxcsum);
1909 /* Enable Receives */
1910 ew32(RCTL, rctl | E1000_RCTL_EN);
1914 * e1000_free_tx_resources - Free Tx Resources per Queue
1915 * @adapter: board private structure
1916 * @tx_ring: Tx descriptor ring for a specific queue
1918 * Free all transmit software resources
1921 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1922 struct e1000_tx_ring *tx_ring)
1924 struct pci_dev *pdev = adapter->pdev;
1926 e1000_clean_tx_ring(adapter, tx_ring);
1928 vfree(tx_ring->buffer_info);
1929 tx_ring->buffer_info = NULL;
1931 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1934 tx_ring->desc = NULL;
1938 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1939 * @adapter: board private structure
1941 * Free all transmit software resources
1944 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1948 for (i = 0; i < adapter->num_tx_queues; i++)
1949 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1952 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1953 struct e1000_buffer *buffer_info)
1955 if (buffer_info->dma) {
1956 if (buffer_info->mapped_as_page)
1957 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1958 buffer_info->length, DMA_TO_DEVICE);
1960 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1961 buffer_info->length,
1963 buffer_info->dma = 0;
1965 if (buffer_info->skb) {
1966 dev_kfree_skb_any(buffer_info->skb);
1967 buffer_info->skb = NULL;
1969 buffer_info->time_stamp = 0;
1970 /* buffer_info must be completely set up in the transmit path */
1974 * e1000_clean_tx_ring - Free Tx Buffers
1975 * @adapter: board private structure
1976 * @tx_ring: ring to be cleaned
1979 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1980 struct e1000_tx_ring *tx_ring)
1982 struct e1000_hw *hw = &adapter->hw;
1983 struct e1000_buffer *buffer_info;
1987 /* Free all the Tx ring sk_buffs */
1989 for (i = 0; i < tx_ring->count; i++) {
1990 buffer_info = &tx_ring->buffer_info[i];
1991 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1994 size = sizeof(struct e1000_buffer) * tx_ring->count;
1995 memset(tx_ring->buffer_info, 0, size);
1997 /* Zero out the descriptor ring */
1999 memset(tx_ring->desc, 0, tx_ring->size);
2001 tx_ring->next_to_use = 0;
2002 tx_ring->next_to_clean = 0;
2003 tx_ring->last_tx_tso = false;
2005 writel(0, hw->hw_addr + tx_ring->tdh);
2006 writel(0, hw->hw_addr + tx_ring->tdt);
2010 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2011 * @adapter: board private structure
2014 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2018 for (i = 0; i < adapter->num_tx_queues; i++)
2019 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2023 * e1000_free_rx_resources - Free Rx Resources
2024 * @adapter: board private structure
2025 * @rx_ring: ring to clean the resources from
2027 * Free all receive software resources
2030 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2031 struct e1000_rx_ring *rx_ring)
2033 struct pci_dev *pdev = adapter->pdev;
2035 e1000_clean_rx_ring(adapter, rx_ring);
2037 vfree(rx_ring->buffer_info);
2038 rx_ring->buffer_info = NULL;
2040 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2043 rx_ring->desc = NULL;
2047 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2048 * @adapter: board private structure
2050 * Free all receive software resources
2053 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2057 for (i = 0; i < adapter->num_rx_queues; i++)
2058 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2062 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2063 * @adapter: board private structure
2064 * @rx_ring: ring to free buffers from
2067 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2068 struct e1000_rx_ring *rx_ring)
2070 struct e1000_hw *hw = &adapter->hw;
2071 struct e1000_buffer *buffer_info;
2072 struct pci_dev *pdev = adapter->pdev;
2076 /* Free all the Rx ring sk_buffs */
2077 for (i = 0; i < rx_ring->count; i++) {
2078 buffer_info = &rx_ring->buffer_info[i];
2079 if (buffer_info->dma &&
2080 adapter->clean_rx == e1000_clean_rx_irq) {
2081 dma_unmap_single(&pdev->dev, buffer_info->dma,
2082 buffer_info->length,
2084 } else if (buffer_info->dma &&
2085 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2086 dma_unmap_page(&pdev->dev, buffer_info->dma,
2087 buffer_info->length,
2091 buffer_info->dma = 0;
2092 if (buffer_info->page) {
2093 put_page(buffer_info->page);
2094 buffer_info->page = NULL;
2096 if (buffer_info->skb) {
2097 dev_kfree_skb(buffer_info->skb);
2098 buffer_info->skb = NULL;
2102 /* there also may be some cached data from a chained receive */
2103 if (rx_ring->rx_skb_top) {
2104 dev_kfree_skb(rx_ring->rx_skb_top);
2105 rx_ring->rx_skb_top = NULL;
2108 size = sizeof(struct e1000_buffer) * rx_ring->count;
2109 memset(rx_ring->buffer_info, 0, size);
2111 /* Zero out the descriptor ring */
2112 memset(rx_ring->desc, 0, rx_ring->size);
2114 rx_ring->next_to_clean = 0;
2115 rx_ring->next_to_use = 0;
2117 writel(0, hw->hw_addr + rx_ring->rdh);
2118 writel(0, hw->hw_addr + rx_ring->rdt);
2122 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2123 * @adapter: board private structure
2126 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2130 for (i = 0; i < adapter->num_rx_queues; i++)
2131 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2134 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2135 * and memory write and invalidate disabled for certain operations
2137 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2139 struct e1000_hw *hw = &adapter->hw;
2140 struct net_device *netdev = adapter->netdev;
2143 e1000_pci_clear_mwi(hw);
2146 rctl |= E1000_RCTL_RST;
2148 E1000_WRITE_FLUSH();
2151 if (netif_running(netdev))
2152 e1000_clean_all_rx_rings(adapter);
2155 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2157 struct e1000_hw *hw = &adapter->hw;
2158 struct net_device *netdev = adapter->netdev;
2162 rctl &= ~E1000_RCTL_RST;
2164 E1000_WRITE_FLUSH();
2167 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2168 e1000_pci_set_mwi(hw);
2170 if (netif_running(netdev)) {
2171 /* No need to loop, because 82542 supports only 1 queue */
2172 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2173 e1000_configure_rx(adapter);
2174 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2179 * e1000_set_mac - Change the Ethernet Address of the NIC
2180 * @netdev: network interface device structure
2181 * @p: pointer to an address structure
2183 * Returns 0 on success, negative on failure
2186 static int e1000_set_mac(struct net_device *netdev, void *p)
2188 struct e1000_adapter *adapter = netdev_priv(netdev);
2189 struct e1000_hw *hw = &adapter->hw;
2190 struct sockaddr *addr = p;
2192 if (!is_valid_ether_addr(addr->sa_data))
2193 return -EADDRNOTAVAIL;
2195 /* 82542 2.0 needs to be in reset to write receive address registers */
2197 if (hw->mac_type == e1000_82542_rev2_0)
2198 e1000_enter_82542_rst(adapter);
2200 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2201 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2203 e1000_rar_set(hw, hw->mac_addr, 0);
2205 if (hw->mac_type == e1000_82542_rev2_0)
2206 e1000_leave_82542_rst(adapter);
2212 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2213 * @netdev: network interface device structure
2215 * The set_rx_mode entry point is called whenever the unicast or multicast
2216 * address lists or the network interface flags are updated. This routine is
2217 * responsible for configuring the hardware for proper unicast, multicast,
2218 * promiscuous mode, and all-multi behavior.
2221 static void e1000_set_rx_mode(struct net_device *netdev)
2223 struct e1000_adapter *adapter = netdev_priv(netdev);
2224 struct e1000_hw *hw = &adapter->hw;
2225 struct netdev_hw_addr *ha;
2226 bool use_uc = false;
2229 int i, rar_entries = E1000_RAR_ENTRIES;
2230 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2231 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2234 e_err(probe, "memory allocation failed\n");
2238 /* Check for Promiscuous and All Multicast modes */
2242 if (netdev->flags & IFF_PROMISC) {
2243 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2244 rctl &= ~E1000_RCTL_VFE;
2246 if (netdev->flags & IFF_ALLMULTI)
2247 rctl |= E1000_RCTL_MPE;
2249 rctl &= ~E1000_RCTL_MPE;
2250 /* Enable VLAN filter if there is a VLAN */
2251 if (e1000_vlan_used(adapter))
2252 rctl |= E1000_RCTL_VFE;
2255 if (netdev_uc_count(netdev) > rar_entries - 1) {
2256 rctl |= E1000_RCTL_UPE;
2257 } else if (!(netdev->flags & IFF_PROMISC)) {
2258 rctl &= ~E1000_RCTL_UPE;
2264 /* 82542 2.0 needs to be in reset to write receive address registers */
2266 if (hw->mac_type == e1000_82542_rev2_0)
2267 e1000_enter_82542_rst(adapter);
2269 /* load the first 14 addresses into the exact filters 1-14. Unicast
2270 * addresses take precedence to avoid disabling unicast filtering
2273 * RAR 0 is used for the station MAC address
2274 * if there are not 14 addresses, go ahead and clear the filters
2278 netdev_for_each_uc_addr(ha, netdev) {
2279 if (i == rar_entries)
2281 e1000_rar_set(hw, ha->addr, i++);
2284 netdev_for_each_mc_addr(ha, netdev) {
2285 if (i == rar_entries) {
2286 /* load any remaining addresses into the hash table */
2287 u32 hash_reg, hash_bit, mta;
2288 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2289 hash_reg = (hash_value >> 5) & 0x7F;
2290 hash_bit = hash_value & 0x1F;
2291 mta = (1 << hash_bit);
2292 mcarray[hash_reg] |= mta;
2294 e1000_rar_set(hw, ha->addr, i++);
2298 for (; i < rar_entries; i++) {
2299 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2300 E1000_WRITE_FLUSH();
2301 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2302 E1000_WRITE_FLUSH();
2305 /* write the hash table completely, write from bottom to avoid
2306 * both stupid write combining chipsets, and flushing each write */
2307 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2309 * If we are on an 82544 has an errata where writing odd
2310 * offsets overwrites the previous even offset, but writing
2311 * backwards over the range solves the issue by always
2312 * writing the odd offset first
2314 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2316 E1000_WRITE_FLUSH();
2318 if (hw->mac_type == e1000_82542_rev2_0)
2319 e1000_leave_82542_rst(adapter);
2325 * e1000_update_phy_info_task - get phy info
2326 * @work: work struct contained inside adapter struct
2328 * Need to wait a few seconds after link up to get diagnostic information from
2331 static void e1000_update_phy_info_task(struct work_struct *work)
2333 struct e1000_adapter *adapter = container_of(work,
2334 struct e1000_adapter,
2335 phy_info_task.work);
2336 if (test_bit(__E1000_DOWN, &adapter->flags))
2338 mutex_lock(&adapter->mutex);
2339 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2340 mutex_unlock(&adapter->mutex);
2344 * e1000_82547_tx_fifo_stall_task - task to complete work
2345 * @work: work struct contained inside adapter struct
2347 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2349 struct e1000_adapter *adapter = container_of(work,
2350 struct e1000_adapter,
2351 fifo_stall_task.work);
2352 struct e1000_hw *hw = &adapter->hw;
2353 struct net_device *netdev = adapter->netdev;
2356 if (test_bit(__E1000_DOWN, &adapter->flags))
2358 mutex_lock(&adapter->mutex);
2359 if (atomic_read(&adapter->tx_fifo_stall)) {
2360 if ((er32(TDT) == er32(TDH)) &&
2361 (er32(TDFT) == er32(TDFH)) &&
2362 (er32(TDFTS) == er32(TDFHS))) {
2364 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2365 ew32(TDFT, adapter->tx_head_addr);
2366 ew32(TDFH, adapter->tx_head_addr);
2367 ew32(TDFTS, adapter->tx_head_addr);
2368 ew32(TDFHS, adapter->tx_head_addr);
2370 E1000_WRITE_FLUSH();
2372 adapter->tx_fifo_head = 0;
2373 atomic_set(&adapter->tx_fifo_stall, 0);
2374 netif_wake_queue(netdev);
2375 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2376 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2379 mutex_unlock(&adapter->mutex);
2382 bool e1000_has_link(struct e1000_adapter *adapter)
2384 struct e1000_hw *hw = &adapter->hw;
2385 bool link_active = false;
2387 /* get_link_status is set on LSC (link status) interrupt or rx
2388 * sequence error interrupt (except on intel ce4100).
2389 * get_link_status will stay false until the
2390 * e1000_check_for_link establishes link for copper adapters
2393 switch (hw->media_type) {
2394 case e1000_media_type_copper:
2395 if (hw->mac_type == e1000_ce4100)
2396 hw->get_link_status = 1;
2397 if (hw->get_link_status) {
2398 e1000_check_for_link(hw);
2399 link_active = !hw->get_link_status;
2404 case e1000_media_type_fiber:
2405 e1000_check_for_link(hw);
2406 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2408 case e1000_media_type_internal_serdes:
2409 e1000_check_for_link(hw);
2410 link_active = hw->serdes_has_link;
2420 * e1000_watchdog - work function
2421 * @work: work struct contained inside adapter struct
2423 static void e1000_watchdog(struct work_struct *work)
2425 struct e1000_adapter *adapter = container_of(work,
2426 struct e1000_adapter,
2427 watchdog_task.work);
2428 struct e1000_hw *hw = &adapter->hw;
2429 struct net_device *netdev = adapter->netdev;
2430 struct e1000_tx_ring *txdr = adapter->tx_ring;
2433 if (test_bit(__E1000_DOWN, &adapter->flags))
2436 mutex_lock(&adapter->mutex);
2437 link = e1000_has_link(adapter);
2438 if ((netif_carrier_ok(netdev)) && link)
2442 if (!netif_carrier_ok(netdev)) {
2445 /* update snapshot of PHY registers on LSC */
2446 e1000_get_speed_and_duplex(hw,
2447 &adapter->link_speed,
2448 &adapter->link_duplex);
2451 pr_info("%s NIC Link is Up %d Mbps %s, "
2452 "Flow Control: %s\n",
2454 adapter->link_speed,
2455 adapter->link_duplex == FULL_DUPLEX ?
2456 "Full Duplex" : "Half Duplex",
2457 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2458 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2459 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2460 E1000_CTRL_TFCE) ? "TX" : "None")));
2462 /* adjust timeout factor according to speed/duplex */
2463 adapter->tx_timeout_factor = 1;
2464 switch (adapter->link_speed) {
2467 adapter->tx_timeout_factor = 16;
2471 /* maybe add some timeout factor ? */
2475 /* enable transmits in the hardware */
2477 tctl |= E1000_TCTL_EN;
2480 netif_carrier_on(netdev);
2481 if (!test_bit(__E1000_DOWN, &adapter->flags))
2482 schedule_delayed_work(&adapter->phy_info_task,
2484 adapter->smartspeed = 0;
2487 if (netif_carrier_ok(netdev)) {
2488 adapter->link_speed = 0;
2489 adapter->link_duplex = 0;
2490 pr_info("%s NIC Link is Down\n",
2492 netif_carrier_off(netdev);
2494 if (!test_bit(__E1000_DOWN, &adapter->flags))
2495 schedule_delayed_work(&adapter->phy_info_task,
2499 e1000_smartspeed(adapter);
2503 e1000_update_stats(adapter);
2505 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2506 adapter->tpt_old = adapter->stats.tpt;
2507 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2508 adapter->colc_old = adapter->stats.colc;
2510 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2511 adapter->gorcl_old = adapter->stats.gorcl;
2512 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2513 adapter->gotcl_old = adapter->stats.gotcl;
2515 e1000_update_adaptive(hw);
2517 if (!netif_carrier_ok(netdev)) {
2518 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2519 /* We've lost link, so the controller stops DMA,
2520 * but we've got queued Tx work that's never going
2521 * to get done, so reset controller to flush Tx.
2522 * (Do the reset outside of interrupt context). */
2523 adapter->tx_timeout_count++;
2524 schedule_work(&adapter->reset_task);
2525 /* exit immediately since reset is imminent */
2530 /* Simple mode for Interrupt Throttle Rate (ITR) */
2531 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2533 * Symmetric Tx/Rx gets a reduced ITR=2000;
2534 * Total asymmetrical Tx or Rx gets ITR=8000;
2535 * everyone else is between 2000-8000.
2537 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2538 u32 dif = (adapter->gotcl > adapter->gorcl ?
2539 adapter->gotcl - adapter->gorcl :
2540 adapter->gorcl - adapter->gotcl) / 10000;
2541 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2543 ew32(ITR, 1000000000 / (itr * 256));
2546 /* Cause software interrupt to ensure rx ring is cleaned */
2547 ew32(ICS, E1000_ICS_RXDMT0);
2549 /* Force detection of hung controller every watchdog period */
2550 adapter->detect_tx_hung = true;
2552 /* Reschedule the task */
2553 if (!test_bit(__E1000_DOWN, &adapter->flags))
2554 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2557 mutex_unlock(&adapter->mutex);
2560 enum latency_range {
2564 latency_invalid = 255
2568 * e1000_update_itr - update the dynamic ITR value based on statistics
2569 * @adapter: pointer to adapter
2570 * @itr_setting: current adapter->itr
2571 * @packets: the number of packets during this measurement interval
2572 * @bytes: the number of bytes during this measurement interval
2574 * Stores a new ITR value based on packets and byte
2575 * counts during the last interrupt. The advantage of per interrupt
2576 * computation is faster updates and more accurate ITR for the current
2577 * traffic pattern. Constants in this function were computed
2578 * based on theoretical maximum wire speed and thresholds were set based
2579 * on testing data as well as attempting to minimize response time
2580 * while increasing bulk throughput.
2581 * this functionality is controlled by the InterruptThrottleRate module
2582 * parameter (see e1000_param.c)
2584 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2585 u16 itr_setting, int packets, int bytes)
2587 unsigned int retval = itr_setting;
2588 struct e1000_hw *hw = &adapter->hw;
2590 if (unlikely(hw->mac_type < e1000_82540))
2591 goto update_itr_done;
2594 goto update_itr_done;
2596 switch (itr_setting) {
2597 case lowest_latency:
2598 /* jumbo frames get bulk treatment*/
2599 if (bytes/packets > 8000)
2600 retval = bulk_latency;
2601 else if ((packets < 5) && (bytes > 512))
2602 retval = low_latency;
2604 case low_latency: /* 50 usec aka 20000 ints/s */
2605 if (bytes > 10000) {
2606 /* jumbo frames need bulk latency setting */
2607 if (bytes/packets > 8000)
2608 retval = bulk_latency;
2609 else if ((packets < 10) || ((bytes/packets) > 1200))
2610 retval = bulk_latency;
2611 else if ((packets > 35))
2612 retval = lowest_latency;
2613 } else if (bytes/packets > 2000)
2614 retval = bulk_latency;
2615 else if (packets <= 2 && bytes < 512)
2616 retval = lowest_latency;
2618 case bulk_latency: /* 250 usec aka 4000 ints/s */
2619 if (bytes > 25000) {
2621 retval = low_latency;
2622 } else if (bytes < 6000) {
2623 retval = low_latency;
2632 static void e1000_set_itr(struct e1000_adapter *adapter)
2634 struct e1000_hw *hw = &adapter->hw;
2636 u32 new_itr = adapter->itr;
2638 if (unlikely(hw->mac_type < e1000_82540))
2641 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2642 if (unlikely(adapter->link_speed != SPEED_1000)) {
2648 adapter->tx_itr = e1000_update_itr(adapter,
2650 adapter->total_tx_packets,
2651 adapter->total_tx_bytes);
2652 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2653 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2654 adapter->tx_itr = low_latency;
2656 adapter->rx_itr = e1000_update_itr(adapter,
2658 adapter->total_rx_packets,
2659 adapter->total_rx_bytes);
2660 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2661 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2662 adapter->rx_itr = low_latency;
2664 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2666 switch (current_itr) {
2667 /* counts and packets in update_itr are dependent on these numbers */
2668 case lowest_latency:
2672 new_itr = 20000; /* aka hwitr = ~200 */
2682 if (new_itr != adapter->itr) {
2683 /* this attempts to bias the interrupt rate towards Bulk
2684 * by adding intermediate steps when interrupt rate is
2686 new_itr = new_itr > adapter->itr ?
2687 min(adapter->itr + (new_itr >> 2), new_itr) :
2689 adapter->itr = new_itr;
2690 ew32(ITR, 1000000000 / (new_itr * 256));
2694 #define E1000_TX_FLAGS_CSUM 0x00000001
2695 #define E1000_TX_FLAGS_VLAN 0x00000002
2696 #define E1000_TX_FLAGS_TSO 0x00000004
2697 #define E1000_TX_FLAGS_IPV4 0x00000008
2698 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2699 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2700 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2702 static int e1000_tso(struct e1000_adapter *adapter,
2703 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2705 struct e1000_context_desc *context_desc;
2706 struct e1000_buffer *buffer_info;
2709 u16 ipcse = 0, tucse, mss;
2710 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2713 if (skb_is_gso(skb)) {
2714 if (skb_header_cloned(skb)) {
2715 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2720 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2721 mss = skb_shinfo(skb)->gso_size;
2722 if (skb->protocol == htons(ETH_P_IP)) {
2723 struct iphdr *iph = ip_hdr(skb);
2726 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2730 cmd_length = E1000_TXD_CMD_IP;
2731 ipcse = skb_transport_offset(skb) - 1;
2732 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2733 ipv6_hdr(skb)->payload_len = 0;
2734 tcp_hdr(skb)->check =
2735 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2736 &ipv6_hdr(skb)->daddr,
2740 ipcss = skb_network_offset(skb);
2741 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2742 tucss = skb_transport_offset(skb);
2743 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2746 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2747 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2749 i = tx_ring->next_to_use;
2750 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2751 buffer_info = &tx_ring->buffer_info[i];
2753 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2754 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2755 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2756 context_desc->upper_setup.tcp_fields.tucss = tucss;
2757 context_desc->upper_setup.tcp_fields.tucso = tucso;
2758 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2759 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2760 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2761 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2763 buffer_info->time_stamp = jiffies;
2764 buffer_info->next_to_watch = i;
2766 if (++i == tx_ring->count) i = 0;
2767 tx_ring->next_to_use = i;
2774 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2775 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2777 struct e1000_context_desc *context_desc;
2778 struct e1000_buffer *buffer_info;
2781 u32 cmd_len = E1000_TXD_CMD_DEXT;
2783 if (skb->ip_summed != CHECKSUM_PARTIAL)
2786 switch (skb->protocol) {
2787 case cpu_to_be16(ETH_P_IP):
2788 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2789 cmd_len |= E1000_TXD_CMD_TCP;
2791 case cpu_to_be16(ETH_P_IPV6):
2792 /* XXX not handling all IPV6 headers */
2793 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2794 cmd_len |= E1000_TXD_CMD_TCP;
2797 if (unlikely(net_ratelimit()))
2798 e_warn(drv, "checksum_partial proto=%x!\n",
2803 css = skb_checksum_start_offset(skb);
2805 i = tx_ring->next_to_use;
2806 buffer_info = &tx_ring->buffer_info[i];
2807 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2809 context_desc->lower_setup.ip_config = 0;
2810 context_desc->upper_setup.tcp_fields.tucss = css;
2811 context_desc->upper_setup.tcp_fields.tucso =
2812 css + skb->csum_offset;
2813 context_desc->upper_setup.tcp_fields.tucse = 0;
2814 context_desc->tcp_seg_setup.data = 0;
2815 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2817 buffer_info->time_stamp = jiffies;
2818 buffer_info->next_to_watch = i;
2820 if (unlikely(++i == tx_ring->count)) i = 0;
2821 tx_ring->next_to_use = i;
2826 #define E1000_MAX_TXD_PWR 12
2827 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2829 static int e1000_tx_map(struct e1000_adapter *adapter,
2830 struct e1000_tx_ring *tx_ring,
2831 struct sk_buff *skb, unsigned int first,
2832 unsigned int max_per_txd, unsigned int nr_frags,
2835 struct e1000_hw *hw = &adapter->hw;
2836 struct pci_dev *pdev = adapter->pdev;
2837 struct e1000_buffer *buffer_info;
2838 unsigned int len = skb_headlen(skb);
2839 unsigned int offset = 0, size, count = 0, i;
2840 unsigned int f, bytecount, segs;
2842 i = tx_ring->next_to_use;
2845 buffer_info = &tx_ring->buffer_info[i];
2846 size = min(len, max_per_txd);
2847 /* Workaround for Controller erratum --
2848 * descriptor for non-tso packet in a linear SKB that follows a
2849 * tso gets written back prematurely before the data is fully
2850 * DMA'd to the controller */
2851 if (!skb->data_len && tx_ring->last_tx_tso &&
2853 tx_ring->last_tx_tso = false;
2857 /* Workaround for premature desc write-backs
2858 * in TSO mode. Append 4-byte sentinel desc */
2859 if (unlikely(mss && !nr_frags && size == len && size > 8))
2861 /* work-around for errata 10 and it applies
2862 * to all controllers in PCI-X mode
2863 * The fix is to make sure that the first descriptor of a
2864 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2866 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2867 (size > 2015) && count == 0))
2870 /* Workaround for potential 82544 hang in PCI-X. Avoid
2871 * terminating buffers within evenly-aligned dwords. */
2872 if (unlikely(adapter->pcix_82544 &&
2873 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2877 buffer_info->length = size;
2878 /* set time_stamp *before* dma to help avoid a possible race */
2879 buffer_info->time_stamp = jiffies;
2880 buffer_info->mapped_as_page = false;
2881 buffer_info->dma = dma_map_single(&pdev->dev,
2883 size, DMA_TO_DEVICE);
2884 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2886 buffer_info->next_to_watch = i;
2893 if (unlikely(i == tx_ring->count))
2898 for (f = 0; f < nr_frags; f++) {
2899 const struct skb_frag_struct *frag;
2901 frag = &skb_shinfo(skb)->frags[f];
2902 len = skb_frag_size(frag);
2906 unsigned long bufend;
2908 if (unlikely(i == tx_ring->count))
2911 buffer_info = &tx_ring->buffer_info[i];
2912 size = min(len, max_per_txd);
2913 /* Workaround for premature desc write-backs
2914 * in TSO mode. Append 4-byte sentinel desc */
2915 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2917 /* Workaround for potential 82544 hang in PCI-X.
2918 * Avoid terminating buffers within evenly-aligned
2920 bufend = (unsigned long)
2921 page_to_phys(skb_frag_page(frag));
2922 bufend += offset + size - 1;
2923 if (unlikely(adapter->pcix_82544 &&
2928 buffer_info->length = size;
2929 buffer_info->time_stamp = jiffies;
2930 buffer_info->mapped_as_page = true;
2931 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2932 offset, size, DMA_TO_DEVICE);
2933 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2935 buffer_info->next_to_watch = i;
2943 segs = skb_shinfo(skb)->gso_segs ?: 1;
2944 /* multiply data chunks by size of headers */
2945 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2947 tx_ring->buffer_info[i].skb = skb;
2948 tx_ring->buffer_info[i].segs = segs;
2949 tx_ring->buffer_info[i].bytecount = bytecount;
2950 tx_ring->buffer_info[first].next_to_watch = i;
2955 dev_err(&pdev->dev, "TX DMA map failed\n");
2956 buffer_info->dma = 0;
2962 i += tx_ring->count;
2964 buffer_info = &tx_ring->buffer_info[i];
2965 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2971 static void e1000_tx_queue(struct e1000_adapter *adapter,
2972 struct e1000_tx_ring *tx_ring, int tx_flags,
2975 struct e1000_hw *hw = &adapter->hw;
2976 struct e1000_tx_desc *tx_desc = NULL;
2977 struct e1000_buffer *buffer_info;
2978 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2981 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2982 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2984 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2986 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2987 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2990 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2991 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2992 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2995 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2996 txd_lower |= E1000_TXD_CMD_VLE;
2997 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3000 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3001 txd_lower &= ~(E1000_TXD_CMD_IFCS);
3003 i = tx_ring->next_to_use;
3006 buffer_info = &tx_ring->buffer_info[i];
3007 tx_desc = E1000_TX_DESC(*tx_ring, i);
3008 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3009 tx_desc->lower.data =
3010 cpu_to_le32(txd_lower | buffer_info->length);
3011 tx_desc->upper.data = cpu_to_le32(txd_upper);
3012 if (unlikely(++i == tx_ring->count)) i = 0;
3015 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3017 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3018 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3019 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3021 /* Force memory writes to complete before letting h/w
3022 * know there are new descriptors to fetch. (Only
3023 * applicable for weak-ordered memory model archs,
3024 * such as IA-64). */
3027 tx_ring->next_to_use = i;
3028 writel(i, hw->hw_addr + tx_ring->tdt);
3029 /* we need this if more than one processor can write to our tail
3030 * at a time, it syncronizes IO on IA64/Altix systems */
3035 * 82547 workaround to avoid controller hang in half-duplex environment.
3036 * The workaround is to avoid queuing a large packet that would span
3037 * the internal Tx FIFO ring boundary by notifying the stack to resend
3038 * the packet at a later time. This gives the Tx FIFO an opportunity to
3039 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3040 * to the beginning of the Tx FIFO.
3043 #define E1000_FIFO_HDR 0x10
3044 #define E1000_82547_PAD_LEN 0x3E0
3046 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3047 struct sk_buff *skb)
3049 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3050 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3052 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3054 if (adapter->link_duplex != HALF_DUPLEX)
3055 goto no_fifo_stall_required;
3057 if (atomic_read(&adapter->tx_fifo_stall))
3060 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3061 atomic_set(&adapter->tx_fifo_stall, 1);
3065 no_fifo_stall_required:
3066 adapter->tx_fifo_head += skb_fifo_len;
3067 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3068 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3072 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3074 struct e1000_adapter *adapter = netdev_priv(netdev);
3075 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3077 netif_stop_queue(netdev);
3078 /* Herbert's original patch had:
3079 * smp_mb__after_netif_stop_queue();
3080 * but since that doesn't exist yet, just open code it. */
3083 /* We need to check again in a case another CPU has just
3084 * made room available. */
3085 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3089 netif_start_queue(netdev);
3090 ++adapter->restart_queue;
3094 static int e1000_maybe_stop_tx(struct net_device *netdev,
3095 struct e1000_tx_ring *tx_ring, int size)
3097 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3099 return __e1000_maybe_stop_tx(netdev, size);
3102 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3103 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3104 struct net_device *netdev)
3106 struct e1000_adapter *adapter = netdev_priv(netdev);
3107 struct e1000_hw *hw = &adapter->hw;
3108 struct e1000_tx_ring *tx_ring;
3109 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3110 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3111 unsigned int tx_flags = 0;
3112 unsigned int len = skb_headlen(skb);
3113 unsigned int nr_frags;
3119 /* This goes back to the question of how to logically map a tx queue
3120 * to a flow. Right now, performance is impacted slightly negatively
3121 * if using multiple tx queues. If the stack breaks away from a
3122 * single qdisc implementation, we can look at this again. */
3123 tx_ring = adapter->tx_ring;
3125 if (unlikely(skb->len <= 0)) {
3126 dev_kfree_skb_any(skb);
3127 return NETDEV_TX_OK;
3130 mss = skb_shinfo(skb)->gso_size;
3131 /* The controller does a simple calculation to
3132 * make sure there is enough room in the FIFO before
3133 * initiating the DMA for each buffer. The calc is:
3134 * 4 = ceil(buffer len/mss). To make sure we don't
3135 * overrun the FIFO, adjust the max buffer len if mss
3139 max_per_txd = min(mss << 2, max_per_txd);
3140 max_txd_pwr = fls(max_per_txd) - 1;
3142 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3143 if (skb->data_len && hdr_len == len) {
3144 switch (hw->mac_type) {
3145 unsigned int pull_size;
3147 /* Make sure we have room to chop off 4 bytes,
3148 * and that the end alignment will work out to
3149 * this hardware's requirements
3150 * NOTE: this is a TSO only workaround
3151 * if end byte alignment not correct move us
3152 * into the next dword */
3153 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3156 pull_size = min((unsigned int)4, skb->data_len);
3157 if (!__pskb_pull_tail(skb, pull_size)) {
3158 e_err(drv, "__pskb_pull_tail "
3160 dev_kfree_skb_any(skb);
3161 return NETDEV_TX_OK;
3163 len = skb_headlen(skb);
3172 /* reserve a descriptor for the offload context */
3173 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3177 /* Controller Erratum workaround */
3178 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3181 count += TXD_USE_COUNT(len, max_txd_pwr);
3183 if (adapter->pcix_82544)
3186 /* work-around for errata 10 and it applies to all controllers
3187 * in PCI-X mode, so add one more descriptor to the count
3189 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3193 nr_frags = skb_shinfo(skb)->nr_frags;
3194 for (f = 0; f < nr_frags; f++)
3195 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3197 if (adapter->pcix_82544)
3200 /* need: count + 2 desc gap to keep tail from touching
3201 * head, otherwise try next time */
3202 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3203 return NETDEV_TX_BUSY;
3205 if (unlikely((hw->mac_type == e1000_82547) &&
3206 (e1000_82547_fifo_workaround(adapter, skb)))) {
3207 netif_stop_queue(netdev);
3208 if (!test_bit(__E1000_DOWN, &adapter->flags))
3209 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3210 return NETDEV_TX_BUSY;
3213 if (vlan_tx_tag_present(skb)) {
3214 tx_flags |= E1000_TX_FLAGS_VLAN;
3215 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3218 first = tx_ring->next_to_use;
3220 tso = e1000_tso(adapter, tx_ring, skb);
3222 dev_kfree_skb_any(skb);
3223 return NETDEV_TX_OK;
3227 if (likely(hw->mac_type != e1000_82544))
3228 tx_ring->last_tx_tso = true;
3229 tx_flags |= E1000_TX_FLAGS_TSO;
3230 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3231 tx_flags |= E1000_TX_FLAGS_CSUM;
3233 if (likely(skb->protocol == htons(ETH_P_IP)))
3234 tx_flags |= E1000_TX_FLAGS_IPV4;
3236 if (unlikely(skb->no_fcs))
3237 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3239 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3243 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3244 /* Make sure there is space in the ring for the next send. */
3245 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3248 dev_kfree_skb_any(skb);
3249 tx_ring->buffer_info[first].time_stamp = 0;
3250 tx_ring->next_to_use = first;
3253 return NETDEV_TX_OK;
3256 #define NUM_REGS 38 /* 1 based count */
3257 static void e1000_regdump(struct e1000_adapter *adapter)
3259 struct e1000_hw *hw = &adapter->hw;
3261 u32 *regs_buff = regs;
3264 static const char * const reg_name[] = {
3266 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3267 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3268 "TIDV", "TXDCTL", "TADV", "TARC0",
3269 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3271 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3272 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3273 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3276 regs_buff[0] = er32(CTRL);
3277 regs_buff[1] = er32(STATUS);
3279 regs_buff[2] = er32(RCTL);
3280 regs_buff[3] = er32(RDLEN);
3281 regs_buff[4] = er32(RDH);
3282 regs_buff[5] = er32(RDT);
3283 regs_buff[6] = er32(RDTR);
3285 regs_buff[7] = er32(TCTL);
3286 regs_buff[8] = er32(TDBAL);
3287 regs_buff[9] = er32(TDBAH);
3288 regs_buff[10] = er32(TDLEN);
3289 regs_buff[11] = er32(TDH);
3290 regs_buff[12] = er32(TDT);
3291 regs_buff[13] = er32(TIDV);
3292 regs_buff[14] = er32(TXDCTL);
3293 regs_buff[15] = er32(TADV);
3294 regs_buff[16] = er32(TARC0);
3296 regs_buff[17] = er32(TDBAL1);
3297 regs_buff[18] = er32(TDBAH1);
3298 regs_buff[19] = er32(TDLEN1);
3299 regs_buff[20] = er32(TDH1);
3300 regs_buff[21] = er32(TDT1);
3301 regs_buff[22] = er32(TXDCTL1);
3302 regs_buff[23] = er32(TARC1);
3303 regs_buff[24] = er32(CTRL_EXT);
3304 regs_buff[25] = er32(ERT);
3305 regs_buff[26] = er32(RDBAL0);
3306 regs_buff[27] = er32(RDBAH0);
3307 regs_buff[28] = er32(TDFH);
3308 regs_buff[29] = er32(TDFT);
3309 regs_buff[30] = er32(TDFHS);
3310 regs_buff[31] = er32(TDFTS);
3311 regs_buff[32] = er32(TDFPC);
3312 regs_buff[33] = er32(RDFH);
3313 regs_buff[34] = er32(RDFT);
3314 regs_buff[35] = er32(RDFHS);
3315 regs_buff[36] = er32(RDFTS);
3316 regs_buff[37] = er32(RDFPC);
3318 pr_info("Register dump\n");
3319 for (i = 0; i < NUM_REGS; i++)
3320 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3324 * e1000_dump: Print registers, tx ring and rx ring
3326 static void e1000_dump(struct e1000_adapter *adapter)
3328 /* this code doesn't handle multiple rings */
3329 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3330 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3333 if (!netif_msg_hw(adapter))
3336 /* Print Registers */
3337 e1000_regdump(adapter);
3342 pr_info("TX Desc ring0 dump\n");
3344 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3346 * Legacy Transmit Descriptor
3347 * +--------------------------------------------------------------+
3348 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3349 * +--------------------------------------------------------------+
3350 * 8 | Special | CSS | Status | CMD | CSO | Length |
3351 * +--------------------------------------------------------------+
3352 * 63 48 47 36 35 32 31 24 23 16 15 0
3354 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3355 * 63 48 47 40 39 32 31 16 15 8 7 0
3356 * +----------------------------------------------------------------+
3357 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3358 * +----------------------------------------------------------------+
3359 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3360 * +----------------------------------------------------------------+
3361 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3363 * Extended Data Descriptor (DTYP=0x1)
3364 * +----------------------------------------------------------------+
3365 * 0 | Buffer Address [63:0] |
3366 * +----------------------------------------------------------------+
3367 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3368 * +----------------------------------------------------------------+
3369 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3371 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3372 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3374 if (!netif_msg_tx_done(adapter))
3375 goto rx_ring_summary;
3377 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3378 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3379 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
3380 struct my_u { u64 a; u64 b; };
3381 struct my_u *u = (struct my_u *)tx_desc;
3384 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3386 else if (i == tx_ring->next_to_use)
3388 else if (i == tx_ring->next_to_clean)
3393 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3394 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3395 le64_to_cpu(u->a), le64_to_cpu(u->b),
3396 (u64)buffer_info->dma, buffer_info->length,
3397 buffer_info->next_to_watch,
3398 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3405 pr_info("\nRX Desc ring dump\n");
3407 /* Legacy Receive Descriptor Format
3409 * +-----------------------------------------------------+
3410 * | Buffer Address [63:0] |
3411 * +-----------------------------------------------------+
3412 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3413 * +-----------------------------------------------------+
3414 * 63 48 47 40 39 32 31 16 15 0
3416 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3418 if (!netif_msg_rx_status(adapter))
3421 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3422 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3423 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i];
3424 struct my_u { u64 a; u64 b; };
3425 struct my_u *u = (struct my_u *)rx_desc;
3428 if (i == rx_ring->next_to_use)
3430 else if (i == rx_ring->next_to_clean)
3435 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3436 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3437 (u64)buffer_info->dma, buffer_info->skb, type);
3440 /* dump the descriptor caches */
3442 pr_info("Rx descriptor cache in 64bit format\n");
3443 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3444 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3446 readl(adapter->hw.hw_addr + i+4),
3447 readl(adapter->hw.hw_addr + i),
3448 readl(adapter->hw.hw_addr + i+12),
3449 readl(adapter->hw.hw_addr + i+8));
3452 pr_info("Tx descriptor cache in 64bit format\n");
3453 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3454 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3456 readl(adapter->hw.hw_addr + i+4),
3457 readl(adapter->hw.hw_addr + i),
3458 readl(adapter->hw.hw_addr + i+12),
3459 readl(adapter->hw.hw_addr + i+8));
3466 * e1000_tx_timeout - Respond to a Tx Hang
3467 * @netdev: network interface device structure
3470 static void e1000_tx_timeout(struct net_device *netdev)
3472 struct e1000_adapter *adapter = netdev_priv(netdev);
3474 /* Do the reset outside of interrupt context */
3475 adapter->tx_timeout_count++;
3476 schedule_work(&adapter->reset_task);
3479 static void e1000_reset_task(struct work_struct *work)
3481 struct e1000_adapter *adapter =
3482 container_of(work, struct e1000_adapter, reset_task);
3484 if (test_bit(__E1000_DOWN, &adapter->flags))
3486 e_err(drv, "Reset adapter\n");
3487 e1000_reinit_safe(adapter);
3491 * e1000_get_stats - Get System Network Statistics
3492 * @netdev: network interface device structure
3494 * Returns the address of the device statistics structure.
3495 * The statistics are actually updated from the watchdog.
3498 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3500 /* only return the current stats */
3501 return &netdev->stats;
3505 * e1000_change_mtu - Change the Maximum Transfer Unit
3506 * @netdev: network interface device structure
3507 * @new_mtu: new value for maximum frame size
3509 * Returns 0 on success, negative on failure
3512 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3514 struct e1000_adapter *adapter = netdev_priv(netdev);
3515 struct e1000_hw *hw = &adapter->hw;
3516 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3518 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3519 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3520 e_err(probe, "Invalid MTU setting\n");
3524 /* Adapter-specific max frame size limits. */
3525 switch (hw->mac_type) {
3526 case e1000_undefined ... e1000_82542_rev2_1:
3527 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3528 e_err(probe, "Jumbo Frames not supported.\n");
3533 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3537 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3539 /* e1000_down has a dependency on max_frame_size */
3540 hw->max_frame_size = max_frame;
3541 if (netif_running(netdev))
3542 e1000_down(adapter);
3544 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3545 * means we reserve 2 more, this pushes us to allocate from the next
3547 * i.e. RXBUFFER_2048 --> size-4096 slab
3548 * however with the new *_jumbo_rx* routines, jumbo receives will use
3549 * fragmented skbs */
3551 if (max_frame <= E1000_RXBUFFER_2048)
3552 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3554 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3555 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3556 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3557 adapter->rx_buffer_len = PAGE_SIZE;
3560 /* adjust allocation if LPE protects us, and we aren't using SBP */
3561 if (!hw->tbi_compatibility_on &&
3562 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3563 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3564 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3566 pr_info("%s changing MTU from %d to %d\n",
3567 netdev->name, netdev->mtu, new_mtu);
3568 netdev->mtu = new_mtu;
3570 if (netif_running(netdev))
3573 e1000_reset(adapter);
3575 clear_bit(__E1000_RESETTING, &adapter->flags);
3581 * e1000_update_stats - Update the board statistics counters
3582 * @adapter: board private structure
3585 void e1000_update_stats(struct e1000_adapter *adapter)
3587 struct net_device *netdev = adapter->netdev;
3588 struct e1000_hw *hw = &adapter->hw;
3589 struct pci_dev *pdev = adapter->pdev;
3590 unsigned long flags;
3593 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3596 * Prevent stats update while adapter is being reset, or if the pci
3597 * connection is down.
3599 if (adapter->link_speed == 0)
3601 if (pci_channel_offline(pdev))
3604 spin_lock_irqsave(&adapter->stats_lock, flags);
3606 /* these counters are modified from e1000_tbi_adjust_stats,
3607 * called from the interrupt context, so they must only
3608 * be written while holding adapter->stats_lock
3611 adapter->stats.crcerrs += er32(CRCERRS);
3612 adapter->stats.gprc += er32(GPRC);
3613 adapter->stats.gorcl += er32(GORCL);
3614 adapter->stats.gorch += er32(GORCH);
3615 adapter->stats.bprc += er32(BPRC);
3616 adapter->stats.mprc += er32(MPRC);
3617 adapter->stats.roc += er32(ROC);
3619 adapter->stats.prc64 += er32(PRC64);
3620 adapter->stats.prc127 += er32(PRC127);
3621 adapter->stats.prc255 += er32(PRC255);
3622 adapter->stats.prc511 += er32(PRC511);
3623 adapter->stats.prc1023 += er32(PRC1023);
3624 adapter->stats.prc1522 += er32(PRC1522);
3626 adapter->stats.symerrs += er32(SYMERRS);
3627 adapter->stats.mpc += er32(MPC);
3628 adapter->stats.scc += er32(SCC);
3629 adapter->stats.ecol += er32(ECOL);
3630 adapter->stats.mcc += er32(MCC);
3631 adapter->stats.latecol += er32(LATECOL);
3632 adapter->stats.dc += er32(DC);
3633 adapter->stats.sec += er32(SEC);
3634 adapter->stats.rlec += er32(RLEC);
3635 adapter->stats.xonrxc += er32(XONRXC);
3636 adapter->stats.xontxc += er32(XONTXC);
3637 adapter->stats.xoffrxc += er32(XOFFRXC);
3638 adapter->stats.xofftxc += er32(XOFFTXC);
3639 adapter->stats.fcruc += er32(FCRUC);
3640 adapter->stats.gptc += er32(GPTC);
3641 adapter->stats.gotcl += er32(GOTCL);
3642 adapter->stats.gotch += er32(GOTCH);
3643 adapter->stats.rnbc += er32(RNBC);
3644 adapter->stats.ruc += er32(RUC);
3645 adapter->stats.rfc += er32(RFC);
3646 adapter->stats.rjc += er32(RJC);
3647 adapter->stats.torl += er32(TORL);
3648 adapter->stats.torh += er32(TORH);
3649 adapter->stats.totl += er32(TOTL);
3650 adapter->stats.toth += er32(TOTH);
3651 adapter->stats.tpr += er32(TPR);
3653 adapter->stats.ptc64 += er32(PTC64);
3654 adapter->stats.ptc127 += er32(PTC127);
3655 adapter->stats.ptc255 += er32(PTC255);
3656 adapter->stats.ptc511 += er32(PTC511);
3657 adapter->stats.ptc1023 += er32(PTC1023);
3658 adapter->stats.ptc1522 += er32(PTC1522);
3660 adapter->stats.mptc += er32(MPTC);
3661 adapter->stats.bptc += er32(BPTC);
3663 /* used for adaptive IFS */
3665 hw->tx_packet_delta = er32(TPT);
3666 adapter->stats.tpt += hw->tx_packet_delta;
3667 hw->collision_delta = er32(COLC);
3668 adapter->stats.colc += hw->collision_delta;
3670 if (hw->mac_type >= e1000_82543) {
3671 adapter->stats.algnerrc += er32(ALGNERRC);
3672 adapter->stats.rxerrc += er32(RXERRC);
3673 adapter->stats.tncrs += er32(TNCRS);
3674 adapter->stats.cexterr += er32(CEXTERR);
3675 adapter->stats.tsctc += er32(TSCTC);
3676 adapter->stats.tsctfc += er32(TSCTFC);
3679 /* Fill out the OS statistics structure */
3680 netdev->stats.multicast = adapter->stats.mprc;
3681 netdev->stats.collisions = adapter->stats.colc;
3685 /* RLEC on some newer hardware can be incorrect so build
3686 * our own version based on RUC and ROC */
3687 netdev->stats.rx_errors = adapter->stats.rxerrc +
3688 adapter->stats.crcerrs + adapter->stats.algnerrc +
3689 adapter->stats.ruc + adapter->stats.roc +
3690 adapter->stats.cexterr;
3691 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3692 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3693 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3694 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3695 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3698 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3699 netdev->stats.tx_errors = adapter->stats.txerrc;
3700 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3701 netdev->stats.tx_window_errors = adapter->stats.latecol;
3702 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3703 if (hw->bad_tx_carr_stats_fd &&
3704 adapter->link_duplex == FULL_DUPLEX) {
3705 netdev->stats.tx_carrier_errors = 0;
3706 adapter->stats.tncrs = 0;
3709 /* Tx Dropped needs to be maintained elsewhere */
3712 if (hw->media_type == e1000_media_type_copper) {
3713 if ((adapter->link_speed == SPEED_1000) &&
3714 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3715 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3716 adapter->phy_stats.idle_errors += phy_tmp;
3719 if ((hw->mac_type <= e1000_82546) &&
3720 (hw->phy_type == e1000_phy_m88) &&
3721 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3722 adapter->phy_stats.receive_errors += phy_tmp;
3725 /* Management Stats */
3726 if (hw->has_smbus) {
3727 adapter->stats.mgptc += er32(MGTPTC);
3728 adapter->stats.mgprc += er32(MGTPRC);
3729 adapter->stats.mgpdc += er32(MGTPDC);
3732 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3736 * e1000_intr - Interrupt Handler
3737 * @irq: interrupt number
3738 * @data: pointer to a network interface device structure
3741 static irqreturn_t e1000_intr(int irq, void *data)
3743 struct net_device *netdev = data;
3744 struct e1000_adapter *adapter = netdev_priv(netdev);
3745 struct e1000_hw *hw = &adapter->hw;
3746 u32 icr = er32(ICR);
3748 if (unlikely((!icr)))
3749 return IRQ_NONE; /* Not our interrupt */
3752 * we might have caused the interrupt, but the above
3753 * read cleared it, and just in case the driver is
3754 * down there is nothing to do so return handled
3756 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3759 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3760 hw->get_link_status = 1;
3761 /* guard against interrupt when we're going down */
3762 if (!test_bit(__E1000_DOWN, &adapter->flags))
3763 schedule_delayed_work(&adapter->watchdog_task, 1);
3766 /* disable interrupts, without the synchronize_irq bit */
3768 E1000_WRITE_FLUSH();
3770 if (likely(napi_schedule_prep(&adapter->napi))) {
3771 adapter->total_tx_bytes = 0;
3772 adapter->total_tx_packets = 0;
3773 adapter->total_rx_bytes = 0;
3774 adapter->total_rx_packets = 0;
3775 __napi_schedule(&adapter->napi);
3777 /* this really should not happen! if it does it is basically a
3778 * bug, but not a hard error, so enable ints and continue */
3779 if (!test_bit(__E1000_DOWN, &adapter->flags))
3780 e1000_irq_enable(adapter);
3787 * e1000_clean - NAPI Rx polling callback
3788 * @adapter: board private structure
3790 static int e1000_clean(struct napi_struct *napi, int budget)
3792 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3793 int tx_clean_complete = 0, work_done = 0;
3795 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3797 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3799 if (!tx_clean_complete)
3802 /* If budget not fully consumed, exit the polling mode */
3803 if (work_done < budget) {
3804 if (likely(adapter->itr_setting & 3))
3805 e1000_set_itr(adapter);
3806 napi_complete(napi);
3807 if (!test_bit(__E1000_DOWN, &adapter->flags))
3808 e1000_irq_enable(adapter);
3815 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3816 * @adapter: board private structure
3818 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3819 struct e1000_tx_ring *tx_ring)
3821 struct e1000_hw *hw = &adapter->hw;
3822 struct net_device *netdev = adapter->netdev;
3823 struct e1000_tx_desc *tx_desc, *eop_desc;
3824 struct e1000_buffer *buffer_info;
3825 unsigned int i, eop;
3826 unsigned int count = 0;
3827 unsigned int total_tx_bytes=0, total_tx_packets=0;
3829 i = tx_ring->next_to_clean;
3830 eop = tx_ring->buffer_info[i].next_to_watch;
3831 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3833 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3834 (count < tx_ring->count)) {
3835 bool cleaned = false;
3836 rmb(); /* read buffer_info after eop_desc */
3837 for ( ; !cleaned; count++) {
3838 tx_desc = E1000_TX_DESC(*tx_ring, i);
3839 buffer_info = &tx_ring->buffer_info[i];
3840 cleaned = (i == eop);
3843 total_tx_packets += buffer_info->segs;
3844 total_tx_bytes += buffer_info->bytecount;
3846 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3847 tx_desc->upper.data = 0;
3849 if (unlikely(++i == tx_ring->count)) i = 0;
3852 eop = tx_ring->buffer_info[i].next_to_watch;
3853 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3856 tx_ring->next_to_clean = i;
3858 #define TX_WAKE_THRESHOLD 32
3859 if (unlikely(count && netif_carrier_ok(netdev) &&
3860 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3861 /* Make sure that anybody stopping the queue after this
3862 * sees the new next_to_clean.
3866 if (netif_queue_stopped(netdev) &&
3867 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3868 netif_wake_queue(netdev);
3869 ++adapter->restart_queue;
3873 if (adapter->detect_tx_hung) {
3874 /* Detect a transmit hang in hardware, this serializes the
3875 * check with the clearing of time_stamp and movement of i */
3876 adapter->detect_tx_hung = false;
3877 if (tx_ring->buffer_info[eop].time_stamp &&
3878 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3879 (adapter->tx_timeout_factor * HZ)) &&
3880 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3882 /* detected Tx unit hang */
3883 e_err(drv, "Detected Tx Unit Hang\n"
3887 " next_to_use <%x>\n"
3888 " next_to_clean <%x>\n"
3889 "buffer_info[next_to_clean]\n"
3890 " time_stamp <%lx>\n"
3891 " next_to_watch <%x>\n"
3893 " next_to_watch.status <%x>\n",
3894 (unsigned long)((tx_ring - adapter->tx_ring) /
3895 sizeof(struct e1000_tx_ring)),
3896 readl(hw->hw_addr + tx_ring->tdh),
3897 readl(hw->hw_addr + tx_ring->tdt),
3898 tx_ring->next_to_use,
3899 tx_ring->next_to_clean,
3900 tx_ring->buffer_info[eop].time_stamp,
3903 eop_desc->upper.fields.status);
3904 e1000_dump(adapter);
3905 netif_stop_queue(netdev);
3908 adapter->total_tx_bytes += total_tx_bytes;
3909 adapter->total_tx_packets += total_tx_packets;
3910 netdev->stats.tx_bytes += total_tx_bytes;
3911 netdev->stats.tx_packets += total_tx_packets;
3912 return count < tx_ring->count;
3916 * e1000_rx_checksum - Receive Checksum Offload for 82543
3917 * @adapter: board private structure
3918 * @status_err: receive descriptor status and error fields
3919 * @csum: receive descriptor csum field
3920 * @sk_buff: socket buffer with received data
3923 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3924 u32 csum, struct sk_buff *skb)
3926 struct e1000_hw *hw = &adapter->hw;
3927 u16 status = (u16)status_err;
3928 u8 errors = (u8)(status_err >> 24);
3930 skb_checksum_none_assert(skb);
3932 /* 82543 or newer only */
3933 if (unlikely(hw->mac_type < e1000_82543)) return;
3934 /* Ignore Checksum bit is set */
3935 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3936 /* TCP/UDP checksum error bit is set */
3937 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3938 /* let the stack verify checksum errors */
3939 adapter->hw_csum_err++;
3942 /* TCP/UDP Checksum has not been calculated */
3943 if (!(status & E1000_RXD_STAT_TCPCS))
3946 /* It must be a TCP or UDP packet with a valid checksum */
3947 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3948 /* TCP checksum is good */
3949 skb->ip_summed = CHECKSUM_UNNECESSARY;
3951 adapter->hw_csum_good++;
3955 * e1000_consume_page - helper function
3957 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3962 skb->data_len += length;
3963 skb->truesize += PAGE_SIZE;
3967 * e1000_receive_skb - helper function to handle rx indications
3968 * @adapter: board private structure
3969 * @status: descriptor status field as written by hardware
3970 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3971 * @skb: pointer to sk_buff to be indicated to stack
3973 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3974 __le16 vlan, struct sk_buff *skb)
3976 skb->protocol = eth_type_trans(skb, adapter->netdev);
3978 if (status & E1000_RXD_STAT_VP) {
3979 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
3981 __vlan_hwaccel_put_tag(skb, vid);
3983 napi_gro_receive(&adapter->napi, skb);
3987 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3988 * @adapter: board private structure
3989 * @rx_ring: ring to clean
3990 * @work_done: amount of napi work completed this call
3991 * @work_to_do: max amount of work allowed for this call to do
3993 * the return value indicates whether actual cleaning was done, there
3994 * is no guarantee that everything was cleaned
3996 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
3997 struct e1000_rx_ring *rx_ring,
3998 int *work_done, int work_to_do)
4000 struct e1000_hw *hw = &adapter->hw;
4001 struct net_device *netdev = adapter->netdev;
4002 struct pci_dev *pdev = adapter->pdev;
4003 struct e1000_rx_desc *rx_desc, *next_rxd;
4004 struct e1000_buffer *buffer_info, *next_buffer;
4005 unsigned long irq_flags;
4008 int cleaned_count = 0;
4009 bool cleaned = false;
4010 unsigned int total_rx_bytes=0, total_rx_packets=0;
4012 i = rx_ring->next_to_clean;
4013 rx_desc = E1000_RX_DESC(*rx_ring, i);
4014 buffer_info = &rx_ring->buffer_info[i];
4016 while (rx_desc->status & E1000_RXD_STAT_DD) {
4017 struct sk_buff *skb;
4020 if (*work_done >= work_to_do)
4023 rmb(); /* read descriptor and rx_buffer_info after status DD */
4025 status = rx_desc->status;
4026 skb = buffer_info->skb;
4027 buffer_info->skb = NULL;
4029 if (++i == rx_ring->count) i = 0;
4030 next_rxd = E1000_RX_DESC(*rx_ring, i);
4033 next_buffer = &rx_ring->buffer_info[i];
4037 dma_unmap_page(&pdev->dev, buffer_info->dma,
4038 buffer_info->length, DMA_FROM_DEVICE);
4039 buffer_info->dma = 0;
4041 length = le16_to_cpu(rx_desc->length);
4043 /* errors is only valid for DD + EOP descriptors */
4044 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4045 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4046 u8 last_byte = *(skb->data + length - 1);
4047 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4049 spin_lock_irqsave(&adapter->stats_lock,
4051 e1000_tbi_adjust_stats(hw, &adapter->stats,
4053 spin_unlock_irqrestore(&adapter->stats_lock,
4057 /* recycle both page and skb */
4058 buffer_info->skb = skb;
4059 /* an error means any chain goes out the window
4061 if (rx_ring->rx_skb_top)
4062 dev_kfree_skb(rx_ring->rx_skb_top);
4063 rx_ring->rx_skb_top = NULL;
4068 #define rxtop rx_ring->rx_skb_top
4069 if (!(status & E1000_RXD_STAT_EOP)) {
4070 /* this descriptor is only the beginning (or middle) */
4072 /* this is the beginning of a chain */
4074 skb_fill_page_desc(rxtop, 0, buffer_info->page,
4077 /* this is the middle of a chain */
4078 skb_fill_page_desc(rxtop,
4079 skb_shinfo(rxtop)->nr_frags,
4080 buffer_info->page, 0, length);
4081 /* re-use the skb, only consumed the page */
4082 buffer_info->skb = skb;
4084 e1000_consume_page(buffer_info, rxtop, length);
4088 /* end of the chain */
4089 skb_fill_page_desc(rxtop,
4090 skb_shinfo(rxtop)->nr_frags,
4091 buffer_info->page, 0, length);
4092 /* re-use the current skb, we only consumed the
4094 buffer_info->skb = skb;
4097 e1000_consume_page(buffer_info, skb, length);
4099 /* no chain, got EOP, this buf is the packet
4100 * copybreak to save the put_page/alloc_page */
4101 if (length <= copybreak &&
4102 skb_tailroom(skb) >= length) {
4104 vaddr = kmap_atomic(buffer_info->page);
4105 memcpy(skb_tail_pointer(skb), vaddr, length);
4106 kunmap_atomic(vaddr);
4107 /* re-use the page, so don't erase
4108 * buffer_info->page */
4109 skb_put(skb, length);
4111 skb_fill_page_desc(skb, 0,
4112 buffer_info->page, 0,
4114 e1000_consume_page(buffer_info, skb,
4120 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4121 e1000_rx_checksum(adapter,
4123 ((u32)(rx_desc->errors) << 24),
4124 le16_to_cpu(rx_desc->csum), skb);
4126 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4127 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4128 pskb_trim(skb, skb->len - 4);
4131 /* eth type trans needs skb->data to point to something */
4132 if (!pskb_may_pull(skb, ETH_HLEN)) {
4133 e_err(drv, "pskb_may_pull failed.\n");
4138 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4141 rx_desc->status = 0;
4143 /* return some buffers to hardware, one at a time is too slow */
4144 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4145 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4149 /* use prefetched values */
4151 buffer_info = next_buffer;
4153 rx_ring->next_to_clean = i;
4155 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4157 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4159 adapter->total_rx_packets += total_rx_packets;
4160 adapter->total_rx_bytes += total_rx_bytes;
4161 netdev->stats.rx_bytes += total_rx_bytes;
4162 netdev->stats.rx_packets += total_rx_packets;
4167 * this should improve performance for small packets with large amounts
4168 * of reassembly being done in the stack
4170 static void e1000_check_copybreak(struct net_device *netdev,
4171 struct e1000_buffer *buffer_info,
4172 u32 length, struct sk_buff **skb)
4174 struct sk_buff *new_skb;
4176 if (length > copybreak)
4179 new_skb = netdev_alloc_skb_ip_align(netdev, length);
4183 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
4184 (*skb)->data - NET_IP_ALIGN,
4185 length + NET_IP_ALIGN);
4186 /* save the skb in buffer_info as good */
4187 buffer_info->skb = *skb;
4192 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4193 * @adapter: board private structure
4194 * @rx_ring: ring to clean
4195 * @work_done: amount of napi work completed this call
4196 * @work_to_do: max amount of work allowed for this call to do
4198 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4199 struct e1000_rx_ring *rx_ring,
4200 int *work_done, int work_to_do)
4202 struct e1000_hw *hw = &adapter->hw;
4203 struct net_device *netdev = adapter->netdev;
4204 struct pci_dev *pdev = adapter->pdev;
4205 struct e1000_rx_desc *rx_desc, *next_rxd;
4206 struct e1000_buffer *buffer_info, *next_buffer;
4207 unsigned long flags;
4210 int cleaned_count = 0;
4211 bool cleaned = false;
4212 unsigned int total_rx_bytes=0, total_rx_packets=0;
4214 i = rx_ring->next_to_clean;
4215 rx_desc = E1000_RX_DESC(*rx_ring, i);
4216 buffer_info = &rx_ring->buffer_info[i];
4218 while (rx_desc->status & E1000_RXD_STAT_DD) {
4219 struct sk_buff *skb;
4222 if (*work_done >= work_to_do)
4225 rmb(); /* read descriptor and rx_buffer_info after status DD */
4227 status = rx_desc->status;
4228 skb = buffer_info->skb;
4229 buffer_info->skb = NULL;
4231 prefetch(skb->data - NET_IP_ALIGN);
4233 if (++i == rx_ring->count) i = 0;
4234 next_rxd = E1000_RX_DESC(*rx_ring, i);
4237 next_buffer = &rx_ring->buffer_info[i];
4241 dma_unmap_single(&pdev->dev, buffer_info->dma,
4242 buffer_info->length, DMA_FROM_DEVICE);
4243 buffer_info->dma = 0;
4245 length = le16_to_cpu(rx_desc->length);
4246 /* !EOP means multiple descriptors were used to store a single
4247 * packet, if thats the case we need to toss it. In fact, we
4248 * to toss every packet with the EOP bit clear and the next
4249 * frame that _does_ have the EOP bit set, as it is by
4250 * definition only a frame fragment
4252 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4253 adapter->discarding = true;
4255 if (adapter->discarding) {
4256 /* All receives must fit into a single buffer */
4257 e_dbg("Receive packet consumed multiple buffers\n");
4259 buffer_info->skb = skb;
4260 if (status & E1000_RXD_STAT_EOP)
4261 adapter->discarding = false;
4265 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4266 u8 last_byte = *(skb->data + length - 1);
4267 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4269 spin_lock_irqsave(&adapter->stats_lock, flags);
4270 e1000_tbi_adjust_stats(hw, &adapter->stats,
4272 spin_unlock_irqrestore(&adapter->stats_lock,
4277 buffer_info->skb = skb;
4282 total_rx_bytes += (length - 4); /* don't count FCS */
4285 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4286 /* adjust length to remove Ethernet CRC, this must be
4287 * done after the TBI_ACCEPT workaround above
4291 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4293 skb_put(skb, length);
4295 /* Receive Checksum Offload */
4296 e1000_rx_checksum(adapter,
4298 ((u32)(rx_desc->errors) << 24),
4299 le16_to_cpu(rx_desc->csum), skb);
4301 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4304 rx_desc->status = 0;
4306 /* return some buffers to hardware, one at a time is too slow */
4307 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4308 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4312 /* use prefetched values */
4314 buffer_info = next_buffer;
4316 rx_ring->next_to_clean = i;
4318 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4320 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4322 adapter->total_rx_packets += total_rx_packets;
4323 adapter->total_rx_bytes += total_rx_bytes;
4324 netdev->stats.rx_bytes += total_rx_bytes;
4325 netdev->stats.rx_packets += total_rx_packets;
4330 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4331 * @adapter: address of board private structure
4332 * @rx_ring: pointer to receive ring structure
4333 * @cleaned_count: number of buffers to allocate this pass
4337 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4338 struct e1000_rx_ring *rx_ring, int cleaned_count)
4340 struct net_device *netdev = adapter->netdev;
4341 struct pci_dev *pdev = adapter->pdev;
4342 struct e1000_rx_desc *rx_desc;
4343 struct e1000_buffer *buffer_info;
4344 struct sk_buff *skb;
4346 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4348 i = rx_ring->next_to_use;
4349 buffer_info = &rx_ring->buffer_info[i];
4351 while (cleaned_count--) {
4352 skb = buffer_info->skb;
4358 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4359 if (unlikely(!skb)) {
4360 /* Better luck next round */
4361 adapter->alloc_rx_buff_failed++;
4365 /* Fix for errata 23, can't cross 64kB boundary */
4366 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4367 struct sk_buff *oldskb = skb;
4368 e_err(rx_err, "skb align check failed: %u bytes at "
4369 "%p\n", bufsz, skb->data);
4370 /* Try again, without freeing the previous */
4371 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4372 /* Failed allocation, critical failure */
4374 dev_kfree_skb(oldskb);
4375 adapter->alloc_rx_buff_failed++;
4379 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4382 dev_kfree_skb(oldskb);
4383 break; /* while (cleaned_count--) */
4386 /* Use new allocation */
4387 dev_kfree_skb(oldskb);
4389 buffer_info->skb = skb;
4390 buffer_info->length = adapter->rx_buffer_len;
4392 /* allocate a new page if necessary */
4393 if (!buffer_info->page) {
4394 buffer_info->page = alloc_page(GFP_ATOMIC);
4395 if (unlikely(!buffer_info->page)) {
4396 adapter->alloc_rx_buff_failed++;
4401 if (!buffer_info->dma) {
4402 buffer_info->dma = dma_map_page(&pdev->dev,
4403 buffer_info->page, 0,
4404 buffer_info->length,
4406 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4407 put_page(buffer_info->page);
4409 buffer_info->page = NULL;
4410 buffer_info->skb = NULL;
4411 buffer_info->dma = 0;
4412 adapter->alloc_rx_buff_failed++;
4413 break; /* while !buffer_info->skb */
4417 rx_desc = E1000_RX_DESC(*rx_ring, i);
4418 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4420 if (unlikely(++i == rx_ring->count))
4422 buffer_info = &rx_ring->buffer_info[i];
4425 if (likely(rx_ring->next_to_use != i)) {
4426 rx_ring->next_to_use = i;
4427 if (unlikely(i-- == 0))
4428 i = (rx_ring->count - 1);
4430 /* Force memory writes to complete before letting h/w
4431 * know there are new descriptors to fetch. (Only
4432 * applicable for weak-ordered memory model archs,
4433 * such as IA-64). */
4435 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4440 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4441 * @adapter: address of board private structure
4444 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4445 struct e1000_rx_ring *rx_ring,
4448 struct e1000_hw *hw = &adapter->hw;
4449 struct net_device *netdev = adapter->netdev;
4450 struct pci_dev *pdev = adapter->pdev;
4451 struct e1000_rx_desc *rx_desc;
4452 struct e1000_buffer *buffer_info;
4453 struct sk_buff *skb;
4455 unsigned int bufsz = adapter->rx_buffer_len;
4457 i = rx_ring->next_to_use;
4458 buffer_info = &rx_ring->buffer_info[i];
4460 while (cleaned_count--) {
4461 skb = buffer_info->skb;
4467 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4468 if (unlikely(!skb)) {
4469 /* Better luck next round */
4470 adapter->alloc_rx_buff_failed++;
4474 /* Fix for errata 23, can't cross 64kB boundary */
4475 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4476 struct sk_buff *oldskb = skb;
4477 e_err(rx_err, "skb align check failed: %u bytes at "
4478 "%p\n", bufsz, skb->data);
4479 /* Try again, without freeing the previous */
4480 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4481 /* Failed allocation, critical failure */
4483 dev_kfree_skb(oldskb);
4484 adapter->alloc_rx_buff_failed++;
4488 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4491 dev_kfree_skb(oldskb);
4492 adapter->alloc_rx_buff_failed++;
4493 break; /* while !buffer_info->skb */
4496 /* Use new allocation */
4497 dev_kfree_skb(oldskb);
4499 buffer_info->skb = skb;
4500 buffer_info->length = adapter->rx_buffer_len;
4502 buffer_info->dma = dma_map_single(&pdev->dev,
4504 buffer_info->length,
4506 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4508 buffer_info->skb = NULL;
4509 buffer_info->dma = 0;
4510 adapter->alloc_rx_buff_failed++;
4511 break; /* while !buffer_info->skb */
4515 * XXX if it was allocated cleanly it will never map to a
4519 /* Fix for errata 23, can't cross 64kB boundary */
4520 if (!e1000_check_64k_bound(adapter,
4521 (void *)(unsigned long)buffer_info->dma,
4522 adapter->rx_buffer_len)) {
4523 e_err(rx_err, "dma align check failed: %u bytes at "
4524 "%p\n", adapter->rx_buffer_len,
4525 (void *)(unsigned long)buffer_info->dma);
4527 buffer_info->skb = NULL;
4529 dma_unmap_single(&pdev->dev, buffer_info->dma,
4530 adapter->rx_buffer_len,
4532 buffer_info->dma = 0;
4534 adapter->alloc_rx_buff_failed++;
4535 break; /* while !buffer_info->skb */
4537 rx_desc = E1000_RX_DESC(*rx_ring, i);
4538 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4540 if (unlikely(++i == rx_ring->count))
4542 buffer_info = &rx_ring->buffer_info[i];
4545 if (likely(rx_ring->next_to_use != i)) {
4546 rx_ring->next_to_use = i;
4547 if (unlikely(i-- == 0))
4548 i = (rx_ring->count - 1);
4550 /* Force memory writes to complete before letting h/w
4551 * know there are new descriptors to fetch. (Only
4552 * applicable for weak-ordered memory model archs,
4553 * such as IA-64). */
4555 writel(i, hw->hw_addr + rx_ring->rdt);
4560 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4564 static void e1000_smartspeed(struct e1000_adapter *adapter)
4566 struct e1000_hw *hw = &adapter->hw;
4570 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4571 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4574 if (adapter->smartspeed == 0) {
4575 /* If Master/Slave config fault is asserted twice,
4576 * we assume back-to-back */
4577 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4578 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4579 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4580 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4581 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4582 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4583 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4584 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4586 adapter->smartspeed++;
4587 if (!e1000_phy_setup_autoneg(hw) &&
4588 !e1000_read_phy_reg(hw, PHY_CTRL,
4590 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4591 MII_CR_RESTART_AUTO_NEG);
4592 e1000_write_phy_reg(hw, PHY_CTRL,
4597 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4598 /* If still no link, perhaps using 2/3 pair cable */
4599 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4600 phy_ctrl |= CR_1000T_MS_ENABLE;
4601 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4602 if (!e1000_phy_setup_autoneg(hw) &&
4603 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4604 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4605 MII_CR_RESTART_AUTO_NEG);
4606 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4609 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4610 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4611 adapter->smartspeed = 0;
4621 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4627 return e1000_mii_ioctl(netdev, ifr, cmd);
4640 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4643 struct e1000_adapter *adapter = netdev_priv(netdev);
4644 struct e1000_hw *hw = &adapter->hw;
4645 struct mii_ioctl_data *data = if_mii(ifr);
4648 unsigned long flags;
4650 if (hw->media_type != e1000_media_type_copper)
4655 data->phy_id = hw->phy_addr;
4658 spin_lock_irqsave(&adapter->stats_lock, flags);
4659 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4661 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4664 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4667 if (data->reg_num & ~(0x1F))
4669 mii_reg = data->val_in;
4670 spin_lock_irqsave(&adapter->stats_lock, flags);
4671 if (e1000_write_phy_reg(hw, data->reg_num,
4673 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4676 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4677 if (hw->media_type == e1000_media_type_copper) {
4678 switch (data->reg_num) {
4680 if (mii_reg & MII_CR_POWER_DOWN)
4682 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4684 hw->autoneg_advertised = 0x2F;
4689 else if (mii_reg & 0x2000)
4693 retval = e1000_set_spd_dplx(
4701 if (netif_running(adapter->netdev))
4702 e1000_reinit_locked(adapter);
4704 e1000_reset(adapter);
4706 case M88E1000_PHY_SPEC_CTRL:
4707 case M88E1000_EXT_PHY_SPEC_CTRL:
4708 if (e1000_phy_reset(hw))
4713 switch (data->reg_num) {
4715 if (mii_reg & MII_CR_POWER_DOWN)
4717 if (netif_running(adapter->netdev))
4718 e1000_reinit_locked(adapter);
4720 e1000_reset(adapter);
4728 return E1000_SUCCESS;
4731 void e1000_pci_set_mwi(struct e1000_hw *hw)
4733 struct e1000_adapter *adapter = hw->back;
4734 int ret_val = pci_set_mwi(adapter->pdev);
4737 e_err(probe, "Error in setting MWI\n");
4740 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4742 struct e1000_adapter *adapter = hw->back;
4744 pci_clear_mwi(adapter->pdev);
4747 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4749 struct e1000_adapter *adapter = hw->back;
4750 return pcix_get_mmrbc(adapter->pdev);
4753 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4755 struct e1000_adapter *adapter = hw->back;
4756 pcix_set_mmrbc(adapter->pdev, mmrbc);
4759 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4764 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4768 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4773 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4776 struct e1000_hw *hw = &adapter->hw;
4779 if (!test_bit(__E1000_DOWN, &adapter->flags))
4780 e1000_irq_disable(adapter);
4783 /* enable VLAN receive filtering */
4785 rctl &= ~E1000_RCTL_CFIEN;
4786 if (!(adapter->netdev->flags & IFF_PROMISC))
4787 rctl |= E1000_RCTL_VFE;
4789 e1000_update_mng_vlan(adapter);
4791 /* disable VLAN receive filtering */
4793 rctl &= ~E1000_RCTL_VFE;
4797 if (!test_bit(__E1000_DOWN, &adapter->flags))
4798 e1000_irq_enable(adapter);
4801 static void e1000_vlan_mode(struct net_device *netdev,
4802 netdev_features_t features)
4804 struct e1000_adapter *adapter = netdev_priv(netdev);
4805 struct e1000_hw *hw = &adapter->hw;
4808 if (!test_bit(__E1000_DOWN, &adapter->flags))
4809 e1000_irq_disable(adapter);
4812 if (features & NETIF_F_HW_VLAN_RX) {
4813 /* enable VLAN tag insert/strip */
4814 ctrl |= E1000_CTRL_VME;
4816 /* disable VLAN tag insert/strip */
4817 ctrl &= ~E1000_CTRL_VME;
4821 if (!test_bit(__E1000_DOWN, &adapter->flags))
4822 e1000_irq_enable(adapter);
4825 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4827 struct e1000_adapter *adapter = netdev_priv(netdev);
4828 struct e1000_hw *hw = &adapter->hw;
4831 if ((hw->mng_cookie.status &
4832 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4833 (vid == adapter->mng_vlan_id))
4836 if (!e1000_vlan_used(adapter))
4837 e1000_vlan_filter_on_off(adapter, true);
4839 /* add VID to filter table */
4840 index = (vid >> 5) & 0x7F;
4841 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4842 vfta |= (1 << (vid & 0x1F));
4843 e1000_write_vfta(hw, index, vfta);
4845 set_bit(vid, adapter->active_vlans);
4850 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4852 struct e1000_adapter *adapter = netdev_priv(netdev);
4853 struct e1000_hw *hw = &adapter->hw;
4856 if (!test_bit(__E1000_DOWN, &adapter->flags))
4857 e1000_irq_disable(adapter);
4858 if (!test_bit(__E1000_DOWN, &adapter->flags))
4859 e1000_irq_enable(adapter);
4861 /* remove VID from filter table */
4862 index = (vid >> 5) & 0x7F;
4863 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4864 vfta &= ~(1 << (vid & 0x1F));
4865 e1000_write_vfta(hw, index, vfta);
4867 clear_bit(vid, adapter->active_vlans);
4869 if (!e1000_vlan_used(adapter))
4870 e1000_vlan_filter_on_off(adapter, false);
4875 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4879 if (!e1000_vlan_used(adapter))
4882 e1000_vlan_filter_on_off(adapter, true);
4883 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4884 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4887 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4889 struct e1000_hw *hw = &adapter->hw;
4893 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4894 * for the switch() below to work */
4895 if ((spd & 1) || (dplx & ~1))
4898 /* Fiber NICs only allow 1000 gbps Full duplex */
4899 if ((hw->media_type == e1000_media_type_fiber) &&
4900 spd != SPEED_1000 &&
4901 dplx != DUPLEX_FULL)
4904 switch (spd + dplx) {
4905 case SPEED_10 + DUPLEX_HALF:
4906 hw->forced_speed_duplex = e1000_10_half;
4908 case SPEED_10 + DUPLEX_FULL:
4909 hw->forced_speed_duplex = e1000_10_full;
4911 case SPEED_100 + DUPLEX_HALF:
4912 hw->forced_speed_duplex = e1000_100_half;
4914 case SPEED_100 + DUPLEX_FULL:
4915 hw->forced_speed_duplex = e1000_100_full;
4917 case SPEED_1000 + DUPLEX_FULL:
4919 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4921 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4928 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4932 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4934 struct net_device *netdev = pci_get_drvdata(pdev);
4935 struct e1000_adapter *adapter = netdev_priv(netdev);
4936 struct e1000_hw *hw = &adapter->hw;
4937 u32 ctrl, ctrl_ext, rctl, status;
4938 u32 wufc = adapter->wol;
4943 netif_device_detach(netdev);
4945 if (netif_running(netdev)) {
4946 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4947 e1000_down(adapter);
4951 retval = pci_save_state(pdev);
4956 status = er32(STATUS);
4957 if (status & E1000_STATUS_LU)
4958 wufc &= ~E1000_WUFC_LNKC;
4961 e1000_setup_rctl(adapter);
4962 e1000_set_rx_mode(netdev);
4966 /* turn on all-multi mode if wake on multicast is enabled */
4967 if (wufc & E1000_WUFC_MC)
4968 rctl |= E1000_RCTL_MPE;
4970 /* enable receives in the hardware */
4971 ew32(RCTL, rctl | E1000_RCTL_EN);
4973 if (hw->mac_type >= e1000_82540) {
4975 /* advertise wake from D3Cold */
4976 #define E1000_CTRL_ADVD3WUC 0x00100000
4977 /* phy power management enable */
4978 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4979 ctrl |= E1000_CTRL_ADVD3WUC |
4980 E1000_CTRL_EN_PHY_PWR_MGMT;
4984 if (hw->media_type == e1000_media_type_fiber ||
4985 hw->media_type == e1000_media_type_internal_serdes) {
4986 /* keep the laser running in D3 */
4987 ctrl_ext = er32(CTRL_EXT);
4988 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4989 ew32(CTRL_EXT, ctrl_ext);
4992 ew32(WUC, E1000_WUC_PME_EN);
4999 e1000_release_manageability(adapter);
5001 *enable_wake = !!wufc;
5003 /* make sure adapter isn't asleep if manageability is enabled */
5004 if (adapter->en_mng_pt)
5005 *enable_wake = true;
5007 if (netif_running(netdev))
5008 e1000_free_irq(adapter);
5010 pci_disable_device(pdev);
5016 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5021 retval = __e1000_shutdown(pdev, &wake);
5026 pci_prepare_to_sleep(pdev);
5028 pci_wake_from_d3(pdev, false);
5029 pci_set_power_state(pdev, PCI_D3hot);
5035 static int e1000_resume(struct pci_dev *pdev)
5037 struct net_device *netdev = pci_get_drvdata(pdev);
5038 struct e1000_adapter *adapter = netdev_priv(netdev);
5039 struct e1000_hw *hw = &adapter->hw;
5042 pci_set_power_state(pdev, PCI_D0);
5043 pci_restore_state(pdev);
5044 pci_save_state(pdev);
5046 if (adapter->need_ioport)
5047 err = pci_enable_device(pdev);
5049 err = pci_enable_device_mem(pdev);
5051 pr_err("Cannot enable PCI device from suspend\n");
5054 pci_set_master(pdev);
5056 pci_enable_wake(pdev, PCI_D3hot, 0);
5057 pci_enable_wake(pdev, PCI_D3cold, 0);
5059 if (netif_running(netdev)) {
5060 err = e1000_request_irq(adapter);
5065 e1000_power_up_phy(adapter);
5066 e1000_reset(adapter);
5069 e1000_init_manageability(adapter);
5071 if (netif_running(netdev))
5074 netif_device_attach(netdev);
5080 static void e1000_shutdown(struct pci_dev *pdev)
5084 __e1000_shutdown(pdev, &wake);
5086 if (system_state == SYSTEM_POWER_OFF) {
5087 pci_wake_from_d3(pdev, wake);
5088 pci_set_power_state(pdev, PCI_D3hot);
5092 #ifdef CONFIG_NET_POLL_CONTROLLER
5094 * Polling 'interrupt' - used by things like netconsole to send skbs
5095 * without having to re-enable interrupts. It's not called while
5096 * the interrupt routine is executing.
5098 static void e1000_netpoll(struct net_device *netdev)
5100 struct e1000_adapter *adapter = netdev_priv(netdev);
5102 disable_irq(adapter->pdev->irq);
5103 e1000_intr(adapter->pdev->irq, netdev);
5104 enable_irq(adapter->pdev->irq);
5109 * e1000_io_error_detected - called when PCI error is detected
5110 * @pdev: Pointer to PCI device
5111 * @state: The current pci connection state
5113 * This function is called after a PCI bus error affecting
5114 * this device has been detected.
5116 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5117 pci_channel_state_t state)
5119 struct net_device *netdev = pci_get_drvdata(pdev);
5120 struct e1000_adapter *adapter = netdev_priv(netdev);
5122 netif_device_detach(netdev);
5124 if (state == pci_channel_io_perm_failure)
5125 return PCI_ERS_RESULT_DISCONNECT;
5127 if (netif_running(netdev))
5128 e1000_down(adapter);
5129 pci_disable_device(pdev);
5131 /* Request a slot slot reset. */
5132 return PCI_ERS_RESULT_NEED_RESET;
5136 * e1000_io_slot_reset - called after the pci bus has been reset.
5137 * @pdev: Pointer to PCI device
5139 * Restart the card from scratch, as if from a cold-boot. Implementation
5140 * resembles the first-half of the e1000_resume routine.
5142 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5144 struct net_device *netdev = pci_get_drvdata(pdev);
5145 struct e1000_adapter *adapter = netdev_priv(netdev);
5146 struct e1000_hw *hw = &adapter->hw;
5149 if (adapter->need_ioport)
5150 err = pci_enable_device(pdev);
5152 err = pci_enable_device_mem(pdev);
5154 pr_err("Cannot re-enable PCI device after reset.\n");
5155 return PCI_ERS_RESULT_DISCONNECT;
5157 pci_set_master(pdev);
5159 pci_enable_wake(pdev, PCI_D3hot, 0);
5160 pci_enable_wake(pdev, PCI_D3cold, 0);
5162 e1000_reset(adapter);
5165 return PCI_ERS_RESULT_RECOVERED;
5169 * e1000_io_resume - called when traffic can start flowing again.
5170 * @pdev: Pointer to PCI device
5172 * This callback is called when the error recovery driver tells us that
5173 * its OK to resume normal operation. Implementation resembles the
5174 * second-half of the e1000_resume routine.
5176 static void e1000_io_resume(struct pci_dev *pdev)
5178 struct net_device *netdev = pci_get_drvdata(pdev);
5179 struct e1000_adapter *adapter = netdev_priv(netdev);
5181 e1000_init_manageability(adapter);
5183 if (netif_running(netdev)) {
5184 if (e1000_up(adapter)) {
5185 pr_info("can't bring device back up after reset\n");
5190 netif_device_attach(netdev);