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 char e1000_driver_name[] = "e1000";
33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
34 #ifndef CONFIG_E1000_NAPI
37 #define DRIVERNAPI "-NAPI"
39 #define DRV_VERSION "7.3.15-k2"DRIVERNAPI
40 char e1000_driver_version[] = DRV_VERSION;
41 static char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
43 /* e1000_pci_tbl - PCI Device ID Table
45 * Last entry must be all 0s
48 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
50 static struct pci_device_id e1000_pci_tbl[] = {
51 INTEL_E1000_ETHERNET_DEVICE(0x1000),
52 INTEL_E1000_ETHERNET_DEVICE(0x1001),
53 INTEL_E1000_ETHERNET_DEVICE(0x1004),
54 INTEL_E1000_ETHERNET_DEVICE(0x1008),
55 INTEL_E1000_ETHERNET_DEVICE(0x1009),
56 INTEL_E1000_ETHERNET_DEVICE(0x100C),
57 INTEL_E1000_ETHERNET_DEVICE(0x100D),
58 INTEL_E1000_ETHERNET_DEVICE(0x100E),
59 INTEL_E1000_ETHERNET_DEVICE(0x100F),
60 INTEL_E1000_ETHERNET_DEVICE(0x1010),
61 INTEL_E1000_ETHERNET_DEVICE(0x1011),
62 INTEL_E1000_ETHERNET_DEVICE(0x1012),
63 INTEL_E1000_ETHERNET_DEVICE(0x1013),
64 INTEL_E1000_ETHERNET_DEVICE(0x1014),
65 INTEL_E1000_ETHERNET_DEVICE(0x1015),
66 INTEL_E1000_ETHERNET_DEVICE(0x1016),
67 INTEL_E1000_ETHERNET_DEVICE(0x1017),
68 INTEL_E1000_ETHERNET_DEVICE(0x1018),
69 INTEL_E1000_ETHERNET_DEVICE(0x1019),
70 INTEL_E1000_ETHERNET_DEVICE(0x101A),
71 INTEL_E1000_ETHERNET_DEVICE(0x101D),
72 INTEL_E1000_ETHERNET_DEVICE(0x101E),
73 INTEL_E1000_ETHERNET_DEVICE(0x1026),
74 INTEL_E1000_ETHERNET_DEVICE(0x1027),
75 INTEL_E1000_ETHERNET_DEVICE(0x1028),
76 INTEL_E1000_ETHERNET_DEVICE(0x1049),
77 INTEL_E1000_ETHERNET_DEVICE(0x104A),
78 INTEL_E1000_ETHERNET_DEVICE(0x104B),
79 INTEL_E1000_ETHERNET_DEVICE(0x104C),
80 INTEL_E1000_ETHERNET_DEVICE(0x104D),
81 INTEL_E1000_ETHERNET_DEVICE(0x105E),
82 INTEL_E1000_ETHERNET_DEVICE(0x105F),
83 INTEL_E1000_ETHERNET_DEVICE(0x1060),
84 INTEL_E1000_ETHERNET_DEVICE(0x1075),
85 INTEL_E1000_ETHERNET_DEVICE(0x1076),
86 INTEL_E1000_ETHERNET_DEVICE(0x1077),
87 INTEL_E1000_ETHERNET_DEVICE(0x1078),
88 INTEL_E1000_ETHERNET_DEVICE(0x1079),
89 INTEL_E1000_ETHERNET_DEVICE(0x107A),
90 INTEL_E1000_ETHERNET_DEVICE(0x107B),
91 INTEL_E1000_ETHERNET_DEVICE(0x107C),
92 INTEL_E1000_ETHERNET_DEVICE(0x107D),
93 INTEL_E1000_ETHERNET_DEVICE(0x107E),
94 INTEL_E1000_ETHERNET_DEVICE(0x107F),
95 INTEL_E1000_ETHERNET_DEVICE(0x108A),
96 INTEL_E1000_ETHERNET_DEVICE(0x108B),
97 INTEL_E1000_ETHERNET_DEVICE(0x108C),
98 INTEL_E1000_ETHERNET_DEVICE(0x1096),
99 INTEL_E1000_ETHERNET_DEVICE(0x1098),
100 INTEL_E1000_ETHERNET_DEVICE(0x1099),
101 INTEL_E1000_ETHERNET_DEVICE(0x109A),
102 INTEL_E1000_ETHERNET_DEVICE(0x10A4),
103 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
104 INTEL_E1000_ETHERNET_DEVICE(0x10B9),
105 INTEL_E1000_ETHERNET_DEVICE(0x10BA),
106 INTEL_E1000_ETHERNET_DEVICE(0x10BB),
107 INTEL_E1000_ETHERNET_DEVICE(0x10BC),
108 INTEL_E1000_ETHERNET_DEVICE(0x10C4),
109 INTEL_E1000_ETHERNET_DEVICE(0x10C5),
110 /* required last entry */
114 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
116 int e1000_up(struct e1000_adapter *adapter);
117 void e1000_down(struct e1000_adapter *adapter);
118 void e1000_reinit_locked(struct e1000_adapter *adapter);
119 void e1000_reset(struct e1000_adapter *adapter);
120 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
121 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
122 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
123 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
124 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
125 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
126 struct e1000_tx_ring *txdr);
127 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
128 struct e1000_rx_ring *rxdr);
129 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
130 struct e1000_tx_ring *tx_ring);
131 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
132 struct e1000_rx_ring *rx_ring);
133 void e1000_update_stats(struct e1000_adapter *adapter);
135 static int e1000_init_module(void);
136 static void e1000_exit_module(void);
137 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
138 static void __devexit e1000_remove(struct pci_dev *pdev);
139 static int e1000_alloc_queues(struct e1000_adapter *adapter);
140 static int e1000_sw_init(struct e1000_adapter *adapter);
141 static int e1000_open(struct net_device *netdev);
142 static int e1000_close(struct net_device *netdev);
143 static void e1000_configure_tx(struct e1000_adapter *adapter);
144 static void e1000_configure_rx(struct e1000_adapter *adapter);
145 static void e1000_setup_rctl(struct e1000_adapter *adapter);
146 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
147 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
148 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
149 struct e1000_tx_ring *tx_ring);
150 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
151 struct e1000_rx_ring *rx_ring);
152 static void e1000_set_multi(struct net_device *netdev);
153 static void e1000_update_phy_info(unsigned long data);
154 static void e1000_watchdog(unsigned long data);
155 static void e1000_82547_tx_fifo_stall(unsigned long data);
156 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
157 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
158 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
159 static int e1000_set_mac(struct net_device *netdev, void *p);
160 static irqreturn_t e1000_intr(int irq, void *data);
161 #ifdef CONFIG_PCI_MSI
162 static irqreturn_t e1000_intr_msi(int irq, void *data);
164 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
165 struct e1000_tx_ring *tx_ring);
166 #ifdef CONFIG_E1000_NAPI
167 static int e1000_clean(struct net_device *poll_dev, int *budget);
168 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
169 struct e1000_rx_ring *rx_ring,
170 int *work_done, int work_to_do);
171 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
172 struct e1000_rx_ring *rx_ring,
173 int *work_done, int work_to_do);
175 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
176 struct e1000_rx_ring *rx_ring);
177 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
178 struct e1000_rx_ring *rx_ring);
180 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
181 struct e1000_rx_ring *rx_ring,
183 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
184 struct e1000_rx_ring *rx_ring,
186 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
187 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
189 void e1000_set_ethtool_ops(struct net_device *netdev);
190 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
191 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
192 static void e1000_tx_timeout(struct net_device *dev);
193 static void e1000_reset_task(struct work_struct *work);
194 static void e1000_smartspeed(struct e1000_adapter *adapter);
195 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
196 struct sk_buff *skb);
198 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
199 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
200 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
201 static void e1000_restore_vlan(struct e1000_adapter *adapter);
203 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
205 static int e1000_resume(struct pci_dev *pdev);
207 static void e1000_shutdown(struct pci_dev *pdev);
209 #ifdef CONFIG_NET_POLL_CONTROLLER
210 /* for netdump / net console */
211 static void e1000_netpoll (struct net_device *netdev);
214 extern void e1000_check_options(struct e1000_adapter *adapter);
216 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
217 pci_channel_state_t state);
218 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
219 static void e1000_io_resume(struct pci_dev *pdev);
221 static struct pci_error_handlers e1000_err_handler = {
222 .error_detected = e1000_io_error_detected,
223 .slot_reset = e1000_io_slot_reset,
224 .resume = e1000_io_resume,
227 static struct pci_driver e1000_driver = {
228 .name = e1000_driver_name,
229 .id_table = e1000_pci_tbl,
230 .probe = e1000_probe,
231 .remove = __devexit_p(e1000_remove),
233 /* Power Managment Hooks */
234 .suspend = e1000_suspend,
235 .resume = e1000_resume,
237 .shutdown = e1000_shutdown,
238 .err_handler = &e1000_err_handler
241 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
242 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
243 MODULE_LICENSE("GPL");
244 MODULE_VERSION(DRV_VERSION);
246 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
247 module_param(debug, int, 0);
248 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
251 * e1000_init_module - Driver Registration Routine
253 * e1000_init_module is the first routine called when the driver is
254 * loaded. All it does is register with the PCI subsystem.
258 e1000_init_module(void)
261 printk(KERN_INFO "%s - version %s\n",
262 e1000_driver_string, e1000_driver_version);
264 printk(KERN_INFO "%s\n", e1000_copyright);
266 ret = pci_register_driver(&e1000_driver);
271 module_init(e1000_init_module);
274 * e1000_exit_module - Driver Exit Cleanup Routine
276 * e1000_exit_module is called just before the driver is removed
281 e1000_exit_module(void)
283 pci_unregister_driver(&e1000_driver);
286 module_exit(e1000_exit_module);
288 static int e1000_request_irq(struct e1000_adapter *adapter)
290 struct net_device *netdev = adapter->netdev;
294 #ifdef CONFIG_PCI_MSI
295 if (adapter->hw.mac_type >= e1000_82571) {
296 adapter->have_msi = TRUE;
297 if ((err = pci_enable_msi(adapter->pdev))) {
299 "Unable to allocate MSI interrupt Error: %d\n", err);
300 adapter->have_msi = FALSE;
303 if (adapter->have_msi) {
304 flags &= ~IRQF_SHARED;
305 err = request_irq(adapter->pdev->irq, &e1000_intr_msi, flags,
306 netdev->name, netdev);
309 "Unable to allocate interrupt Error: %d\n", err);
312 if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
313 netdev->name, netdev)))
315 "Unable to allocate interrupt Error: %d\n", err);
320 static void e1000_free_irq(struct e1000_adapter *adapter)
322 struct net_device *netdev = adapter->netdev;
324 free_irq(adapter->pdev->irq, netdev);
326 #ifdef CONFIG_PCI_MSI
327 if (adapter->have_msi)
328 pci_disable_msi(adapter->pdev);
333 * e1000_irq_disable - Mask off interrupt generation on the NIC
334 * @adapter: board private structure
338 e1000_irq_disable(struct e1000_adapter *adapter)
340 atomic_inc(&adapter->irq_sem);
341 E1000_WRITE_REG(&adapter->hw, IMC, ~0);
342 E1000_WRITE_FLUSH(&adapter->hw);
343 synchronize_irq(adapter->pdev->irq);
347 * e1000_irq_enable - Enable default interrupt generation settings
348 * @adapter: board private structure
352 e1000_irq_enable(struct e1000_adapter *adapter)
354 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
355 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
356 E1000_WRITE_FLUSH(&adapter->hw);
361 e1000_update_mng_vlan(struct e1000_adapter *adapter)
363 struct net_device *netdev = adapter->netdev;
364 uint16_t vid = adapter->hw.mng_cookie.vlan_id;
365 uint16_t old_vid = adapter->mng_vlan_id;
366 if (adapter->vlgrp) {
367 if (!adapter->vlgrp->vlan_devices[vid]) {
368 if (adapter->hw.mng_cookie.status &
369 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
370 e1000_vlan_rx_add_vid(netdev, vid);
371 adapter->mng_vlan_id = vid;
373 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
375 if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
377 !adapter->vlgrp->vlan_devices[old_vid])
378 e1000_vlan_rx_kill_vid(netdev, old_vid);
380 adapter->mng_vlan_id = vid;
385 * e1000_release_hw_control - release control of the h/w to f/w
386 * @adapter: address of board private structure
388 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
389 * For ASF and Pass Through versions of f/w this means that the
390 * driver is no longer loaded. For AMT version (only with 82573) i
391 * of the f/w this means that the network i/f is closed.
396 e1000_release_hw_control(struct e1000_adapter *adapter)
402 /* Let firmware taken over control of h/w */
403 switch (adapter->hw.mac_type) {
406 case e1000_80003es2lan:
407 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
408 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
409 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
412 swsm = E1000_READ_REG(&adapter->hw, SWSM);
413 E1000_WRITE_REG(&adapter->hw, SWSM,
414 swsm & ~E1000_SWSM_DRV_LOAD);
416 extcnf = E1000_READ_REG(&adapter->hw, CTRL_EXT);
417 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
418 extcnf & ~E1000_CTRL_EXT_DRV_LOAD);
426 * e1000_get_hw_control - get control of the h/w from f/w
427 * @adapter: address of board private structure
429 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
430 * For ASF and Pass Through versions of f/w this means that
431 * the driver is loaded. For AMT version (only with 82573)
432 * of the f/w this means that the network i/f is open.
437 e1000_get_hw_control(struct e1000_adapter *adapter)
443 /* Let firmware know the driver has taken over */
444 switch (adapter->hw.mac_type) {
447 case e1000_80003es2lan:
448 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
449 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
450 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
453 swsm = E1000_READ_REG(&adapter->hw, SWSM);
454 E1000_WRITE_REG(&adapter->hw, SWSM,
455 swsm | E1000_SWSM_DRV_LOAD);
458 extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL);
459 E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL,
460 extcnf | E1000_EXTCNF_CTRL_SWFLAG);
468 e1000_init_manageability(struct e1000_adapter *adapter)
470 if (adapter->en_mng_pt) {
471 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
473 /* disable hardware interception of ARP */
474 manc &= ~(E1000_MANC_ARP_EN);
476 /* enable receiving management packets to the host */
477 /* this will probably generate destination unreachable messages
478 * from the host OS, but the packets will be handled on SMBUS */
479 if (adapter->hw.has_manc2h) {
480 uint32_t manc2h = E1000_READ_REG(&adapter->hw, MANC2H);
482 manc |= E1000_MANC_EN_MNG2HOST;
483 #define E1000_MNG2HOST_PORT_623 (1 << 5)
484 #define E1000_MNG2HOST_PORT_664 (1 << 6)
485 manc2h |= E1000_MNG2HOST_PORT_623;
486 manc2h |= E1000_MNG2HOST_PORT_664;
487 E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);
490 E1000_WRITE_REG(&adapter->hw, MANC, manc);
495 e1000_release_manageability(struct e1000_adapter *adapter)
497 if (adapter->en_mng_pt) {
498 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
500 /* re-enable hardware interception of ARP */
501 manc |= E1000_MANC_ARP_EN;
503 if (adapter->hw.has_manc2h)
504 manc &= ~E1000_MANC_EN_MNG2HOST;
506 /* don't explicitly have to mess with MANC2H since
507 * MANC has an enable disable that gates MANC2H */
509 E1000_WRITE_REG(&adapter->hw, MANC, manc);
514 e1000_up(struct e1000_adapter *adapter)
516 struct net_device *netdev = adapter->netdev;
519 /* hardware has been reset, we need to reload some things */
521 e1000_set_multi(netdev);
523 e1000_restore_vlan(adapter);
524 e1000_init_manageability(adapter);
526 e1000_configure_tx(adapter);
527 e1000_setup_rctl(adapter);
528 e1000_configure_rx(adapter);
529 /* call E1000_DESC_UNUSED which always leaves
530 * at least 1 descriptor unused to make sure
531 * next_to_use != next_to_clean */
532 for (i = 0; i < adapter->num_rx_queues; i++) {
533 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
534 adapter->alloc_rx_buf(adapter, ring,
535 E1000_DESC_UNUSED(ring));
538 adapter->tx_queue_len = netdev->tx_queue_len;
540 #ifdef CONFIG_E1000_NAPI
541 netif_poll_enable(netdev);
543 e1000_irq_enable(adapter);
545 clear_bit(__E1000_DOWN, &adapter->flags);
547 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
552 * e1000_power_up_phy - restore link in case the phy was powered down
553 * @adapter: address of board private structure
555 * The phy may be powered down to save power and turn off link when the
556 * driver is unloaded and wake on lan is not enabled (among others)
557 * *** this routine MUST be followed by a call to e1000_reset ***
561 void e1000_power_up_phy(struct e1000_adapter *adapter)
563 uint16_t mii_reg = 0;
565 /* Just clear the power down bit to wake the phy back up */
566 if (adapter->hw.media_type == e1000_media_type_copper) {
567 /* according to the manual, the phy will retain its
568 * settings across a power-down/up cycle */
569 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
570 mii_reg &= ~MII_CR_POWER_DOWN;
571 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
575 static void e1000_power_down_phy(struct e1000_adapter *adapter)
577 /* Power down the PHY so no link is implied when interface is down *
578 * The PHY cannot be powered down if any of the following is TRUE *
581 * (c) SoL/IDER session is active */
582 if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
583 adapter->hw.media_type == e1000_media_type_copper) {
584 uint16_t mii_reg = 0;
586 switch (adapter->hw.mac_type) {
589 case e1000_82545_rev_3:
591 case e1000_82546_rev_3:
593 case e1000_82541_rev_2:
595 case e1000_82547_rev_2:
596 if (E1000_READ_REG(&adapter->hw, MANC) &
603 case e1000_80003es2lan:
605 if (e1000_check_mng_mode(&adapter->hw) ||
606 e1000_check_phy_reset_block(&adapter->hw))
612 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
613 mii_reg |= MII_CR_POWER_DOWN;
614 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
622 e1000_down(struct e1000_adapter *adapter)
624 struct net_device *netdev = adapter->netdev;
626 /* signal that we're down so the interrupt handler does not
627 * reschedule our watchdog timer */
628 set_bit(__E1000_DOWN, &adapter->flags);
630 e1000_irq_disable(adapter);
632 del_timer_sync(&adapter->tx_fifo_stall_timer);
633 del_timer_sync(&adapter->watchdog_timer);
634 del_timer_sync(&adapter->phy_info_timer);
636 #ifdef CONFIG_E1000_NAPI
637 netif_poll_disable(netdev);
639 netdev->tx_queue_len = adapter->tx_queue_len;
640 adapter->link_speed = 0;
641 adapter->link_duplex = 0;
642 netif_carrier_off(netdev);
643 netif_stop_queue(netdev);
645 e1000_reset(adapter);
646 e1000_clean_all_tx_rings(adapter);
647 e1000_clean_all_rx_rings(adapter);
651 e1000_reinit_locked(struct e1000_adapter *adapter)
653 WARN_ON(in_interrupt());
654 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
658 clear_bit(__E1000_RESETTING, &adapter->flags);
662 e1000_reset(struct e1000_adapter *adapter)
664 uint32_t pba = 0, tx_space, min_tx_space, min_rx_space;
665 uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
666 boolean_t legacy_pba_adjust = FALSE;
668 /* Repartition Pba for greater than 9k mtu
669 * To take effect CTRL.RST is required.
672 switch (adapter->hw.mac_type) {
673 case e1000_82542_rev2_0:
674 case e1000_82542_rev2_1:
679 case e1000_82541_rev_2:
680 legacy_pba_adjust = TRUE;
684 case e1000_82545_rev_3:
686 case e1000_82546_rev_3:
690 case e1000_82547_rev_2:
691 legacy_pba_adjust = TRUE;
696 case e1000_80003es2lan:
704 case e1000_undefined:
709 if (legacy_pba_adjust == TRUE) {
710 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
711 pba -= 8; /* allocate more FIFO for Tx */
713 if (adapter->hw.mac_type == e1000_82547) {
714 adapter->tx_fifo_head = 0;
715 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
716 adapter->tx_fifo_size =
717 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
718 atomic_set(&adapter->tx_fifo_stall, 0);
720 } else if (adapter->hw.max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
721 /* adjust PBA for jumbo frames */
722 E1000_WRITE_REG(&adapter->hw, PBA, pba);
724 /* To maintain wire speed transmits, the Tx FIFO should be
725 * large enough to accomodate two full transmit packets,
726 * rounded up to the next 1KB and expressed in KB. Likewise,
727 * the Rx FIFO should be large enough to accomodate at least
728 * one full receive packet and is similarly rounded up and
729 * expressed in KB. */
730 pba = E1000_READ_REG(&adapter->hw, PBA);
731 /* upper 16 bits has Tx packet buffer allocation size in KB */
732 tx_space = pba >> 16;
733 /* lower 16 bits has Rx packet buffer allocation size in KB */
735 /* don't include ethernet FCS because hardware appends/strips */
736 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
738 min_tx_space = min_rx_space;
740 E1000_ROUNDUP(min_tx_space, 1024);
742 E1000_ROUNDUP(min_rx_space, 1024);
745 /* If current Tx allocation is less than the min Tx FIFO size,
746 * and the min Tx FIFO size is less than the current Rx FIFO
747 * allocation, take space away from current Rx allocation */
748 if (tx_space < min_tx_space &&
749 ((min_tx_space - tx_space) < pba)) {
750 pba = pba - (min_tx_space - tx_space);
752 /* PCI/PCIx hardware has PBA alignment constraints */
753 switch (adapter->hw.mac_type) {
754 case e1000_82545 ... e1000_82546_rev_3:
755 pba &= ~(E1000_PBA_8K - 1);
761 /* if short on rx space, rx wins and must trump tx
762 * adjustment or use Early Receive if available */
763 if (pba < min_rx_space) {
764 switch (adapter->hw.mac_type) {
766 /* ERT enabled in e1000_configure_rx */
776 E1000_WRITE_REG(&adapter->hw, PBA, pba);
778 /* flow control settings */
779 /* Set the FC high water mark to 90% of the FIFO size.
780 * Required to clear last 3 LSB */
781 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
782 /* We can't use 90% on small FIFOs because the remainder
783 * would be less than 1 full frame. In this case, we size
784 * it to allow at least a full frame above the high water
786 if (pba < E1000_PBA_16K)
787 fc_high_water_mark = (pba * 1024) - 1600;
789 adapter->hw.fc_high_water = fc_high_water_mark;
790 adapter->hw.fc_low_water = fc_high_water_mark - 8;
791 if (adapter->hw.mac_type == e1000_80003es2lan)
792 adapter->hw.fc_pause_time = 0xFFFF;
794 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
795 adapter->hw.fc_send_xon = 1;
796 adapter->hw.fc = adapter->hw.original_fc;
798 /* Allow time for pending master requests to run */
799 e1000_reset_hw(&adapter->hw);
800 if (adapter->hw.mac_type >= e1000_82544)
801 E1000_WRITE_REG(&adapter->hw, WUC, 0);
803 if (e1000_init_hw(&adapter->hw))
804 DPRINTK(PROBE, ERR, "Hardware Error\n");
805 e1000_update_mng_vlan(adapter);
807 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
808 if (adapter->hw.mac_type >= e1000_82544 &&
809 adapter->hw.mac_type <= e1000_82547_rev_2 &&
810 adapter->hw.autoneg == 1 &&
811 adapter->hw.autoneg_advertised == ADVERTISE_1000_FULL) {
812 uint32_t ctrl = E1000_READ_REG(&adapter->hw, CTRL);
813 /* clear phy power management bit if we are in gig only mode,
814 * which if enabled will attempt negotiation to 100Mb, which
815 * can cause a loss of link at power off or driver unload */
816 ctrl &= ~E1000_CTRL_SWDPIN3;
817 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
820 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
821 E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
823 e1000_reset_adaptive(&adapter->hw);
824 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
826 if (!adapter->smart_power_down &&
827 (adapter->hw.mac_type == e1000_82571 ||
828 adapter->hw.mac_type == e1000_82572)) {
829 uint16_t phy_data = 0;
830 /* speed up time to link by disabling smart power down, ignore
831 * the return value of this function because there is nothing
832 * different we would do if it failed */
833 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
835 phy_data &= ~IGP02E1000_PM_SPD;
836 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
840 e1000_release_manageability(adapter);
844 * e1000_probe - Device Initialization Routine
845 * @pdev: PCI device information struct
846 * @ent: entry in e1000_pci_tbl
848 * Returns 0 on success, negative on failure
850 * e1000_probe initializes an adapter identified by a pci_dev structure.
851 * The OS initialization, configuring of the adapter private structure,
852 * and a hardware reset occur.
856 e1000_probe(struct pci_dev *pdev,
857 const struct pci_device_id *ent)
859 struct net_device *netdev;
860 struct e1000_adapter *adapter;
861 unsigned long mmio_start, mmio_len;
862 unsigned long flash_start, flash_len;
864 static int cards_found = 0;
865 static int global_quad_port_a = 0; /* global ksp3 port a indication */
866 int i, err, pci_using_dac;
867 uint16_t eeprom_data = 0;
868 uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
869 if ((err = pci_enable_device(pdev)))
872 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
873 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
876 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
877 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
878 E1000_ERR("No usable DMA configuration, aborting\n");
884 if ((err = pci_request_regions(pdev, e1000_driver_name)))
887 pci_set_master(pdev);
890 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
892 goto err_alloc_etherdev;
894 SET_MODULE_OWNER(netdev);
895 SET_NETDEV_DEV(netdev, &pdev->dev);
897 pci_set_drvdata(pdev, netdev);
898 adapter = netdev_priv(netdev);
899 adapter->netdev = netdev;
900 adapter->pdev = pdev;
901 adapter->hw.back = adapter;
902 adapter->msg_enable = (1 << debug) - 1;
904 mmio_start = pci_resource_start(pdev, BAR_0);
905 mmio_len = pci_resource_len(pdev, BAR_0);
908 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
909 if (!adapter->hw.hw_addr)
912 for (i = BAR_1; i <= BAR_5; i++) {
913 if (pci_resource_len(pdev, i) == 0)
915 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
916 adapter->hw.io_base = pci_resource_start(pdev, i);
921 netdev->open = &e1000_open;
922 netdev->stop = &e1000_close;
923 netdev->hard_start_xmit = &e1000_xmit_frame;
924 netdev->get_stats = &e1000_get_stats;
925 netdev->set_multicast_list = &e1000_set_multi;
926 netdev->set_mac_address = &e1000_set_mac;
927 netdev->change_mtu = &e1000_change_mtu;
928 netdev->do_ioctl = &e1000_ioctl;
929 e1000_set_ethtool_ops(netdev);
930 netdev->tx_timeout = &e1000_tx_timeout;
931 netdev->watchdog_timeo = 5 * HZ;
932 #ifdef CONFIG_E1000_NAPI
933 netdev->poll = &e1000_clean;
936 netdev->vlan_rx_register = e1000_vlan_rx_register;
937 netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
938 netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
939 #ifdef CONFIG_NET_POLL_CONTROLLER
940 netdev->poll_controller = e1000_netpoll;
942 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
944 netdev->mem_start = mmio_start;
945 netdev->mem_end = mmio_start + mmio_len;
946 netdev->base_addr = adapter->hw.io_base;
948 adapter->bd_number = cards_found;
950 /* setup the private structure */
952 if ((err = e1000_sw_init(adapter)))
956 /* Flash BAR mapping must happen after e1000_sw_init
957 * because it depends on mac_type */
958 if ((adapter->hw.mac_type == e1000_ich8lan) &&
959 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
960 flash_start = pci_resource_start(pdev, 1);
961 flash_len = pci_resource_len(pdev, 1);
962 adapter->hw.flash_address = ioremap(flash_start, flash_len);
963 if (!adapter->hw.flash_address)
967 if (e1000_check_phy_reset_block(&adapter->hw))
968 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
970 if (adapter->hw.mac_type >= e1000_82543) {
971 netdev->features = NETIF_F_SG |
975 NETIF_F_HW_VLAN_FILTER;
976 if (adapter->hw.mac_type == e1000_ich8lan)
977 netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
981 if ((adapter->hw.mac_type >= e1000_82544) &&
982 (adapter->hw.mac_type != e1000_82547))
983 netdev->features |= NETIF_F_TSO;
985 #ifdef CONFIG_DEBUG_SLAB
986 /* 82544's work arounds do not play nicely with DEBUG SLAB */
987 if (adapter->hw.mac_type == e1000_82544)
988 netdev->features &= ~NETIF_F_TSO;
992 if (adapter->hw.mac_type > e1000_82547_rev_2)
993 netdev->features |= NETIF_F_TSO6;
997 netdev->features |= NETIF_F_HIGHDMA;
999 netdev->features |= NETIF_F_LLTX;
1001 adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
1003 /* initialize eeprom parameters */
1005 if (e1000_init_eeprom_params(&adapter->hw)) {
1006 E1000_ERR("EEPROM initialization failed\n");
1010 /* before reading the EEPROM, reset the controller to
1011 * put the device in a known good starting state */
1013 e1000_reset_hw(&adapter->hw);
1015 /* make sure the EEPROM is good */
1017 if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
1018 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1022 /* copy the MAC address out of the EEPROM */
1024 if (e1000_read_mac_addr(&adapter->hw))
1025 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1026 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
1027 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
1029 if (!is_valid_ether_addr(netdev->perm_addr)) {
1030 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1034 e1000_get_bus_info(&adapter->hw);
1036 init_timer(&adapter->tx_fifo_stall_timer);
1037 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1038 adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
1040 init_timer(&adapter->watchdog_timer);
1041 adapter->watchdog_timer.function = &e1000_watchdog;
1042 adapter->watchdog_timer.data = (unsigned long) adapter;
1044 init_timer(&adapter->phy_info_timer);
1045 adapter->phy_info_timer.function = &e1000_update_phy_info;
1046 adapter->phy_info_timer.data = (unsigned long) adapter;
1048 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1050 e1000_check_options(adapter);
1052 /* Initial Wake on LAN setting
1053 * If APM wake is enabled in the EEPROM,
1054 * enable the ACPI Magic Packet filter
1057 switch (adapter->hw.mac_type) {
1058 case e1000_82542_rev2_0:
1059 case e1000_82542_rev2_1:
1063 e1000_read_eeprom(&adapter->hw,
1064 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1065 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1068 e1000_read_eeprom(&adapter->hw,
1069 EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1070 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1073 case e1000_82546_rev_3:
1075 case e1000_80003es2lan:
1076 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
1077 e1000_read_eeprom(&adapter->hw,
1078 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1083 e1000_read_eeprom(&adapter->hw,
1084 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1087 if (eeprom_data & eeprom_apme_mask)
1088 adapter->eeprom_wol |= E1000_WUFC_MAG;
1090 /* now that we have the eeprom settings, apply the special cases
1091 * where the eeprom may be wrong or the board simply won't support
1092 * wake on lan on a particular port */
1093 switch (pdev->device) {
1094 case E1000_DEV_ID_82546GB_PCIE:
1095 adapter->eeprom_wol = 0;
1097 case E1000_DEV_ID_82546EB_FIBER:
1098 case E1000_DEV_ID_82546GB_FIBER:
1099 case E1000_DEV_ID_82571EB_FIBER:
1100 /* Wake events only supported on port A for dual fiber
1101 * regardless of eeprom setting */
1102 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
1103 adapter->eeprom_wol = 0;
1105 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1106 case E1000_DEV_ID_82571EB_QUAD_COPPER:
1107 case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1108 /* if quad port adapter, disable WoL on all but port A */
1109 if (global_quad_port_a != 0)
1110 adapter->eeprom_wol = 0;
1112 adapter->quad_port_a = 1;
1113 /* Reset for multiple quad port adapters */
1114 if (++global_quad_port_a == 4)
1115 global_quad_port_a = 0;
1119 /* initialize the wol settings based on the eeprom settings */
1120 adapter->wol = adapter->eeprom_wol;
1122 /* print bus type/speed/width info */
1124 struct e1000_hw *hw = &adapter->hw;
1125 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1126 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1127 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1128 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1129 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1130 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1131 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1132 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1133 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1134 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1135 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1139 for (i = 0; i < 6; i++)
1140 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
1142 /* reset the hardware with the new settings */
1143 e1000_reset(adapter);
1145 /* If the controller is 82573 and f/w is AMT, do not set
1146 * DRV_LOAD until the interface is up. For all other cases,
1147 * let the f/w know that the h/w is now under the control
1149 if (adapter->hw.mac_type != e1000_82573 ||
1150 !e1000_check_mng_mode(&adapter->hw))
1151 e1000_get_hw_control(adapter);
1153 strcpy(netdev->name, "eth%d");
1154 if ((err = register_netdev(netdev)))
1157 /* tell the stack to leave us alone until e1000_open() is called */
1158 netif_carrier_off(netdev);
1159 netif_stop_queue(netdev);
1161 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1167 e1000_release_hw_control(adapter);
1169 if (!e1000_check_phy_reset_block(&adapter->hw))
1170 e1000_phy_hw_reset(&adapter->hw);
1172 if (adapter->hw.flash_address)
1173 iounmap(adapter->hw.flash_address);
1175 #ifdef CONFIG_E1000_NAPI
1176 for (i = 0; i < adapter->num_rx_queues; i++)
1177 dev_put(&adapter->polling_netdev[i]);
1180 kfree(adapter->tx_ring);
1181 kfree(adapter->rx_ring);
1182 #ifdef CONFIG_E1000_NAPI
1183 kfree(adapter->polling_netdev);
1186 iounmap(adapter->hw.hw_addr);
1188 free_netdev(netdev);
1190 pci_release_regions(pdev);
1193 pci_disable_device(pdev);
1198 * e1000_remove - Device Removal Routine
1199 * @pdev: PCI device information struct
1201 * e1000_remove is called by the PCI subsystem to alert the driver
1202 * that it should release a PCI device. The could be caused by a
1203 * Hot-Plug event, or because the driver is going to be removed from
1207 static void __devexit
1208 e1000_remove(struct pci_dev *pdev)
1210 struct net_device *netdev = pci_get_drvdata(pdev);
1211 struct e1000_adapter *adapter = netdev_priv(netdev);
1212 #ifdef CONFIG_E1000_NAPI
1216 flush_scheduled_work();
1218 e1000_release_manageability(adapter);
1220 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1221 * would have already happened in close and is redundant. */
1222 e1000_release_hw_control(adapter);
1224 unregister_netdev(netdev);
1225 #ifdef CONFIG_E1000_NAPI
1226 for (i = 0; i < adapter->num_rx_queues; i++)
1227 dev_put(&adapter->polling_netdev[i]);
1230 if (!e1000_check_phy_reset_block(&adapter->hw))
1231 e1000_phy_hw_reset(&adapter->hw);
1233 kfree(adapter->tx_ring);
1234 kfree(adapter->rx_ring);
1235 #ifdef CONFIG_E1000_NAPI
1236 kfree(adapter->polling_netdev);
1239 iounmap(adapter->hw.hw_addr);
1240 if (adapter->hw.flash_address)
1241 iounmap(adapter->hw.flash_address);
1242 pci_release_regions(pdev);
1244 free_netdev(netdev);
1246 pci_disable_device(pdev);
1250 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1251 * @adapter: board private structure to initialize
1253 * e1000_sw_init initializes the Adapter private data structure.
1254 * Fields are initialized based on PCI device information and
1255 * OS network device settings (MTU size).
1258 static int __devinit
1259 e1000_sw_init(struct e1000_adapter *adapter)
1261 struct e1000_hw *hw = &adapter->hw;
1262 struct net_device *netdev = adapter->netdev;
1263 struct pci_dev *pdev = adapter->pdev;
1264 #ifdef CONFIG_E1000_NAPI
1268 /* PCI config space info */
1270 hw->vendor_id = pdev->vendor;
1271 hw->device_id = pdev->device;
1272 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1273 hw->subsystem_id = pdev->subsystem_device;
1275 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1277 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1279 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1280 adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1281 hw->max_frame_size = netdev->mtu +
1282 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1283 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1285 /* identify the MAC */
1287 if (e1000_set_mac_type(hw)) {
1288 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1292 switch (hw->mac_type) {
1297 case e1000_82541_rev_2:
1298 case e1000_82547_rev_2:
1299 hw->phy_init_script = 1;
1303 e1000_set_media_type(hw);
1305 hw->wait_autoneg_complete = FALSE;
1306 hw->tbi_compatibility_en = TRUE;
1307 hw->adaptive_ifs = TRUE;
1309 /* Copper options */
1311 if (hw->media_type == e1000_media_type_copper) {
1312 hw->mdix = AUTO_ALL_MODES;
1313 hw->disable_polarity_correction = FALSE;
1314 hw->master_slave = E1000_MASTER_SLAVE;
1317 adapter->num_tx_queues = 1;
1318 adapter->num_rx_queues = 1;
1320 if (e1000_alloc_queues(adapter)) {
1321 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1325 #ifdef CONFIG_E1000_NAPI
1326 for (i = 0; i < adapter->num_rx_queues; i++) {
1327 adapter->polling_netdev[i].priv = adapter;
1328 adapter->polling_netdev[i].poll = &e1000_clean;
1329 adapter->polling_netdev[i].weight = 64;
1330 dev_hold(&adapter->polling_netdev[i]);
1331 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1333 spin_lock_init(&adapter->tx_queue_lock);
1336 atomic_set(&adapter->irq_sem, 1);
1337 spin_lock_init(&adapter->stats_lock);
1339 set_bit(__E1000_DOWN, &adapter->flags);
1345 * e1000_alloc_queues - Allocate memory for all rings
1346 * @adapter: board private structure to initialize
1348 * We allocate one ring per queue at run-time since we don't know the
1349 * number of queues at compile-time. The polling_netdev array is
1350 * intended for Multiqueue, but should work fine with a single queue.
1353 static int __devinit
1354 e1000_alloc_queues(struct e1000_adapter *adapter)
1358 size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1359 adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1360 if (!adapter->tx_ring)
1362 memset(adapter->tx_ring, 0, size);
1364 size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1365 adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1366 if (!adapter->rx_ring) {
1367 kfree(adapter->tx_ring);
1370 memset(adapter->rx_ring, 0, size);
1372 #ifdef CONFIG_E1000_NAPI
1373 size = sizeof(struct net_device) * adapter->num_rx_queues;
1374 adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1375 if (!adapter->polling_netdev) {
1376 kfree(adapter->tx_ring);
1377 kfree(adapter->rx_ring);
1380 memset(adapter->polling_netdev, 0, size);
1383 return E1000_SUCCESS;
1387 * e1000_open - Called when a network interface is made active
1388 * @netdev: network interface device structure
1390 * Returns 0 on success, negative value on failure
1392 * The open entry point is called when a network interface is made
1393 * active by the system (IFF_UP). At this point all resources needed
1394 * for transmit and receive operations are allocated, the interrupt
1395 * handler is registered with the OS, the watchdog timer is started,
1396 * and the stack is notified that the interface is ready.
1400 e1000_open(struct net_device *netdev)
1402 struct e1000_adapter *adapter = netdev_priv(netdev);
1405 /* disallow open during test */
1406 if (test_bit(__E1000_TESTING, &adapter->flags))
1409 /* allocate transmit descriptors */
1410 if ((err = e1000_setup_all_tx_resources(adapter)))
1413 /* allocate receive descriptors */
1414 if ((err = e1000_setup_all_rx_resources(adapter)))
1417 err = e1000_request_irq(adapter);
1421 e1000_power_up_phy(adapter);
1423 if ((err = e1000_up(adapter)))
1425 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1426 if ((adapter->hw.mng_cookie.status &
1427 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1428 e1000_update_mng_vlan(adapter);
1431 /* If AMT is enabled, let the firmware know that the network
1432 * interface is now open */
1433 if (adapter->hw.mac_type == e1000_82573 &&
1434 e1000_check_mng_mode(&adapter->hw))
1435 e1000_get_hw_control(adapter);
1437 return E1000_SUCCESS;
1440 e1000_power_down_phy(adapter);
1441 e1000_free_irq(adapter);
1443 e1000_free_all_rx_resources(adapter);
1445 e1000_free_all_tx_resources(adapter);
1447 e1000_reset(adapter);
1453 * e1000_close - Disables a network interface
1454 * @netdev: network interface device structure
1456 * Returns 0, this is not allowed to fail
1458 * The close entry point is called when an interface is de-activated
1459 * by the OS. The hardware is still under the drivers control, but
1460 * needs to be disabled. A global MAC reset is issued to stop the
1461 * hardware, and all transmit and receive resources are freed.
1465 e1000_close(struct net_device *netdev)
1467 struct e1000_adapter *adapter = netdev_priv(netdev);
1469 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1470 e1000_down(adapter);
1471 e1000_power_down_phy(adapter);
1472 e1000_free_irq(adapter);
1474 e1000_free_all_tx_resources(adapter);
1475 e1000_free_all_rx_resources(adapter);
1477 /* kill manageability vlan ID if supported, but not if a vlan with
1478 * the same ID is registered on the host OS (let 8021q kill it) */
1479 if ((adapter->hw.mng_cookie.status &
1480 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1482 adapter->vlgrp->vlan_devices[adapter->mng_vlan_id])) {
1483 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1486 /* If AMT is enabled, let the firmware know that the network
1487 * interface is now closed */
1488 if (adapter->hw.mac_type == e1000_82573 &&
1489 e1000_check_mng_mode(&adapter->hw))
1490 e1000_release_hw_control(adapter);
1496 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1497 * @adapter: address of board private structure
1498 * @start: address of beginning of memory
1499 * @len: length of memory
1502 e1000_check_64k_bound(struct e1000_adapter *adapter,
1503 void *start, unsigned long len)
1505 unsigned long begin = (unsigned long) start;
1506 unsigned long end = begin + len;
1508 /* First rev 82545 and 82546 need to not allow any memory
1509 * write location to cross 64k boundary due to errata 23 */
1510 if (adapter->hw.mac_type == e1000_82545 ||
1511 adapter->hw.mac_type == e1000_82546) {
1512 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1519 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1520 * @adapter: board private structure
1521 * @txdr: tx descriptor ring (for a specific queue) to setup
1523 * Return 0 on success, negative on failure
1527 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1528 struct e1000_tx_ring *txdr)
1530 struct pci_dev *pdev = adapter->pdev;
1533 size = sizeof(struct e1000_buffer) * txdr->count;
1534 txdr->buffer_info = vmalloc(size);
1535 if (!txdr->buffer_info) {
1537 "Unable to allocate memory for the transmit descriptor ring\n");
1540 memset(txdr->buffer_info, 0, size);
1542 /* round up to nearest 4K */
1544 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1545 E1000_ROUNDUP(txdr->size, 4096);
1547 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1550 vfree(txdr->buffer_info);
1552 "Unable to allocate memory for the transmit descriptor ring\n");
1556 /* Fix for errata 23, can't cross 64kB boundary */
1557 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1558 void *olddesc = txdr->desc;
1559 dma_addr_t olddma = txdr->dma;
1560 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1561 "at %p\n", txdr->size, txdr->desc);
1562 /* Try again, without freeing the previous */
1563 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1564 /* Failed allocation, critical failure */
1566 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1567 goto setup_tx_desc_die;
1570 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1572 pci_free_consistent(pdev, txdr->size, txdr->desc,
1574 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1576 "Unable to allocate aligned memory "
1577 "for the transmit descriptor ring\n");
1578 vfree(txdr->buffer_info);
1581 /* Free old allocation, new allocation was successful */
1582 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1585 memset(txdr->desc, 0, txdr->size);
1587 txdr->next_to_use = 0;
1588 txdr->next_to_clean = 0;
1589 spin_lock_init(&txdr->tx_lock);
1595 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1596 * (Descriptors) for all queues
1597 * @adapter: board private structure
1599 * Return 0 on success, negative on failure
1603 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1607 for (i = 0; i < adapter->num_tx_queues; i++) {
1608 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1611 "Allocation for Tx Queue %u failed\n", i);
1612 for (i-- ; i >= 0; i--)
1613 e1000_free_tx_resources(adapter,
1614 &adapter->tx_ring[i]);
1623 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1624 * @adapter: board private structure
1626 * Configure the Tx unit of the MAC after a reset.
1630 e1000_configure_tx(struct e1000_adapter *adapter)
1633 struct e1000_hw *hw = &adapter->hw;
1634 uint32_t tdlen, tctl, tipg, tarc;
1635 uint32_t ipgr1, ipgr2;
1637 /* Setup the HW Tx Head and Tail descriptor pointers */
1639 switch (adapter->num_tx_queues) {
1642 tdba = adapter->tx_ring[0].dma;
1643 tdlen = adapter->tx_ring[0].count *
1644 sizeof(struct e1000_tx_desc);
1645 E1000_WRITE_REG(hw, TDLEN, tdlen);
1646 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1647 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1648 E1000_WRITE_REG(hw, TDT, 0);
1649 E1000_WRITE_REG(hw, TDH, 0);
1650 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1651 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1655 /* Set the default values for the Tx Inter Packet Gap timer */
1656 if (adapter->hw.mac_type <= e1000_82547_rev_2 &&
1657 (hw->media_type == e1000_media_type_fiber ||
1658 hw->media_type == e1000_media_type_internal_serdes))
1659 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1661 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1663 switch (hw->mac_type) {
1664 case e1000_82542_rev2_0:
1665 case e1000_82542_rev2_1:
1666 tipg = DEFAULT_82542_TIPG_IPGT;
1667 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1668 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1670 case e1000_80003es2lan:
1671 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1672 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1675 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1676 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1679 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1680 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1681 E1000_WRITE_REG(hw, TIPG, tipg);
1683 /* Set the Tx Interrupt Delay register */
1685 E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1686 if (hw->mac_type >= e1000_82540)
1687 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1689 /* Program the Transmit Control Register */
1691 tctl = E1000_READ_REG(hw, TCTL);
1692 tctl &= ~E1000_TCTL_CT;
1693 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1694 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1696 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1697 tarc = E1000_READ_REG(hw, TARC0);
1698 /* set the speed mode bit, we'll clear it if we're not at
1699 * gigabit link later */
1701 E1000_WRITE_REG(hw, TARC0, tarc);
1702 } else if (hw->mac_type == e1000_80003es2lan) {
1703 tarc = E1000_READ_REG(hw, TARC0);
1705 E1000_WRITE_REG(hw, TARC0, tarc);
1706 tarc = E1000_READ_REG(hw, TARC1);
1708 E1000_WRITE_REG(hw, TARC1, tarc);
1711 e1000_config_collision_dist(hw);
1713 /* Setup Transmit Descriptor Settings for eop descriptor */
1714 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1716 /* only set IDE if we are delaying interrupts using the timers */
1717 if (adapter->tx_int_delay)
1718 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1720 if (hw->mac_type < e1000_82543)
1721 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1723 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1725 /* Cache if we're 82544 running in PCI-X because we'll
1726 * need this to apply a workaround later in the send path. */
1727 if (hw->mac_type == e1000_82544 &&
1728 hw->bus_type == e1000_bus_type_pcix)
1729 adapter->pcix_82544 = 1;
1731 E1000_WRITE_REG(hw, TCTL, tctl);
1736 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1737 * @adapter: board private structure
1738 * @rxdr: rx descriptor ring (for a specific queue) to setup
1740 * Returns 0 on success, negative on failure
1744 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1745 struct e1000_rx_ring *rxdr)
1747 struct pci_dev *pdev = adapter->pdev;
1750 size = sizeof(struct e1000_buffer) * rxdr->count;
1751 rxdr->buffer_info = vmalloc(size);
1752 if (!rxdr->buffer_info) {
1754 "Unable to allocate memory for the receive descriptor ring\n");
1757 memset(rxdr->buffer_info, 0, size);
1759 size = sizeof(struct e1000_ps_page) * rxdr->count;
1760 rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1761 if (!rxdr->ps_page) {
1762 vfree(rxdr->buffer_info);
1764 "Unable to allocate memory for the receive descriptor ring\n");
1767 memset(rxdr->ps_page, 0, size);
1769 size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1770 rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1771 if (!rxdr->ps_page_dma) {
1772 vfree(rxdr->buffer_info);
1773 kfree(rxdr->ps_page);
1775 "Unable to allocate memory for the receive descriptor ring\n");
1778 memset(rxdr->ps_page_dma, 0, size);
1780 if (adapter->hw.mac_type <= e1000_82547_rev_2)
1781 desc_len = sizeof(struct e1000_rx_desc);
1783 desc_len = sizeof(union e1000_rx_desc_packet_split);
1785 /* Round up to nearest 4K */
1787 rxdr->size = rxdr->count * desc_len;
1788 E1000_ROUNDUP(rxdr->size, 4096);
1790 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1794 "Unable to allocate memory for the receive descriptor ring\n");
1796 vfree(rxdr->buffer_info);
1797 kfree(rxdr->ps_page);
1798 kfree(rxdr->ps_page_dma);
1802 /* Fix for errata 23, can't cross 64kB boundary */
1803 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1804 void *olddesc = rxdr->desc;
1805 dma_addr_t olddma = rxdr->dma;
1806 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1807 "at %p\n", rxdr->size, rxdr->desc);
1808 /* Try again, without freeing the previous */
1809 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1810 /* Failed allocation, critical failure */
1812 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1814 "Unable to allocate memory "
1815 "for the receive descriptor ring\n");
1816 goto setup_rx_desc_die;
1819 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1821 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1823 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1825 "Unable to allocate aligned memory "
1826 "for the receive descriptor ring\n");
1827 goto setup_rx_desc_die;
1829 /* Free old allocation, new allocation was successful */
1830 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1833 memset(rxdr->desc, 0, rxdr->size);
1835 rxdr->next_to_clean = 0;
1836 rxdr->next_to_use = 0;
1842 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1843 * (Descriptors) for all queues
1844 * @adapter: board private structure
1846 * Return 0 on success, negative on failure
1850 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1854 for (i = 0; i < adapter->num_rx_queues; i++) {
1855 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1858 "Allocation for Rx Queue %u failed\n", i);
1859 for (i-- ; i >= 0; i--)
1860 e1000_free_rx_resources(adapter,
1861 &adapter->rx_ring[i]);
1870 * e1000_setup_rctl - configure the receive control registers
1871 * @adapter: Board private structure
1873 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1874 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1876 e1000_setup_rctl(struct e1000_adapter *adapter)
1878 uint32_t rctl, rfctl;
1879 uint32_t psrctl = 0;
1880 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1884 rctl = E1000_READ_REG(&adapter->hw, RCTL);
1886 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1888 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1889 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1890 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1892 if (adapter->hw.tbi_compatibility_on == 1)
1893 rctl |= E1000_RCTL_SBP;
1895 rctl &= ~E1000_RCTL_SBP;
1897 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1898 rctl &= ~E1000_RCTL_LPE;
1900 rctl |= E1000_RCTL_LPE;
1902 /* Setup buffer sizes */
1903 rctl &= ~E1000_RCTL_SZ_4096;
1904 rctl |= E1000_RCTL_BSEX;
1905 switch (adapter->rx_buffer_len) {
1906 case E1000_RXBUFFER_256:
1907 rctl |= E1000_RCTL_SZ_256;
1908 rctl &= ~E1000_RCTL_BSEX;
1910 case E1000_RXBUFFER_512:
1911 rctl |= E1000_RCTL_SZ_512;
1912 rctl &= ~E1000_RCTL_BSEX;
1914 case E1000_RXBUFFER_1024:
1915 rctl |= E1000_RCTL_SZ_1024;
1916 rctl &= ~E1000_RCTL_BSEX;
1918 case E1000_RXBUFFER_2048:
1920 rctl |= E1000_RCTL_SZ_2048;
1921 rctl &= ~E1000_RCTL_BSEX;
1923 case E1000_RXBUFFER_4096:
1924 rctl |= E1000_RCTL_SZ_4096;
1926 case E1000_RXBUFFER_8192:
1927 rctl |= E1000_RCTL_SZ_8192;
1929 case E1000_RXBUFFER_16384:
1930 rctl |= E1000_RCTL_SZ_16384;
1934 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1935 /* 82571 and greater support packet-split where the protocol
1936 * header is placed in skb->data and the packet data is
1937 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1938 * In the case of a non-split, skb->data is linearly filled,
1939 * followed by the page buffers. Therefore, skb->data is
1940 * sized to hold the largest protocol header.
1942 /* allocations using alloc_page take too long for regular MTU
1943 * so only enable packet split for jumbo frames */
1944 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1945 if ((adapter->hw.mac_type >= e1000_82571) && (pages <= 3) &&
1946 PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
1947 adapter->rx_ps_pages = pages;
1949 adapter->rx_ps_pages = 0;
1951 if (adapter->rx_ps_pages) {
1952 /* Configure extra packet-split registers */
1953 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1954 rfctl |= E1000_RFCTL_EXTEN;
1955 /* disable packet split support for IPv6 extension headers,
1956 * because some malformed IPv6 headers can hang the RX */
1957 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
1958 E1000_RFCTL_NEW_IPV6_EXT_DIS);
1960 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1962 rctl |= E1000_RCTL_DTYP_PS;
1964 psrctl |= adapter->rx_ps_bsize0 >>
1965 E1000_PSRCTL_BSIZE0_SHIFT;
1967 switch (adapter->rx_ps_pages) {
1969 psrctl |= PAGE_SIZE <<
1970 E1000_PSRCTL_BSIZE3_SHIFT;
1972 psrctl |= PAGE_SIZE <<
1973 E1000_PSRCTL_BSIZE2_SHIFT;
1975 psrctl |= PAGE_SIZE >>
1976 E1000_PSRCTL_BSIZE1_SHIFT;
1980 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1983 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1987 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1988 * @adapter: board private structure
1990 * Configure the Rx unit of the MAC after a reset.
1994 e1000_configure_rx(struct e1000_adapter *adapter)
1997 struct e1000_hw *hw = &adapter->hw;
1998 uint32_t rdlen, rctl, rxcsum, ctrl_ext;
2000 if (adapter->rx_ps_pages) {
2001 /* this is a 32 byte descriptor */
2002 rdlen = adapter->rx_ring[0].count *
2003 sizeof(union e1000_rx_desc_packet_split);
2004 adapter->clean_rx = e1000_clean_rx_irq_ps;
2005 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2007 rdlen = adapter->rx_ring[0].count *
2008 sizeof(struct e1000_rx_desc);
2009 adapter->clean_rx = e1000_clean_rx_irq;
2010 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2013 /* disable receives while setting up the descriptors */
2014 rctl = E1000_READ_REG(hw, RCTL);
2015 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
2017 /* set the Receive Delay Timer Register */
2018 E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
2020 if (hw->mac_type >= e1000_82540) {
2021 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
2022 if (adapter->itr_setting != 0)
2023 E1000_WRITE_REG(hw, ITR,
2024 1000000000 / (adapter->itr * 256));
2027 if (hw->mac_type >= e1000_82571) {
2028 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
2029 /* Reset delay timers after every interrupt */
2030 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2031 #ifdef CONFIG_E1000_NAPI
2032 /* Auto-Mask interrupts upon ICR access */
2033 ctrl_ext |= E1000_CTRL_EXT_IAME;
2034 E1000_WRITE_REG(hw, IAM, 0xffffffff);
2036 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
2037 E1000_WRITE_FLUSH(hw);
2040 /* Setup the HW Rx Head and Tail Descriptor Pointers and
2041 * the Base and Length of the Rx Descriptor Ring */
2042 switch (adapter->num_rx_queues) {
2045 rdba = adapter->rx_ring[0].dma;
2046 E1000_WRITE_REG(hw, RDLEN, rdlen);
2047 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
2048 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
2049 E1000_WRITE_REG(hw, RDT, 0);
2050 E1000_WRITE_REG(hw, RDH, 0);
2051 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2052 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2056 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2057 if (hw->mac_type >= e1000_82543) {
2058 rxcsum = E1000_READ_REG(hw, RXCSUM);
2059 if (adapter->rx_csum == TRUE) {
2060 rxcsum |= E1000_RXCSUM_TUOFL;
2062 /* Enable 82571 IPv4 payload checksum for UDP fragments
2063 * Must be used in conjunction with packet-split. */
2064 if ((hw->mac_type >= e1000_82571) &&
2065 (adapter->rx_ps_pages)) {
2066 rxcsum |= E1000_RXCSUM_IPPCSE;
2069 rxcsum &= ~E1000_RXCSUM_TUOFL;
2070 /* don't need to clear IPPCSE as it defaults to 0 */
2072 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
2075 /* enable early receives on 82573, only takes effect if using > 2048
2076 * byte total frame size. for example only for jumbo frames */
2077 #define E1000_ERT_2048 0x100
2078 if (hw->mac_type == e1000_82573)
2079 E1000_WRITE_REG(hw, ERT, E1000_ERT_2048);
2081 /* Enable Receives */
2082 E1000_WRITE_REG(hw, RCTL, rctl);
2086 * e1000_free_tx_resources - Free Tx Resources per Queue
2087 * @adapter: board private structure
2088 * @tx_ring: Tx descriptor ring for a specific queue
2090 * Free all transmit software resources
2094 e1000_free_tx_resources(struct e1000_adapter *adapter,
2095 struct e1000_tx_ring *tx_ring)
2097 struct pci_dev *pdev = adapter->pdev;
2099 e1000_clean_tx_ring(adapter, tx_ring);
2101 vfree(tx_ring->buffer_info);
2102 tx_ring->buffer_info = NULL;
2104 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2106 tx_ring->desc = NULL;
2110 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2111 * @adapter: board private structure
2113 * Free all transmit software resources
2117 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2121 for (i = 0; i < adapter->num_tx_queues; i++)
2122 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2126 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2127 struct e1000_buffer *buffer_info)
2129 if (buffer_info->dma) {
2130 pci_unmap_page(adapter->pdev,
2132 buffer_info->length,
2134 buffer_info->dma = 0;
2136 if (buffer_info->skb) {
2137 dev_kfree_skb_any(buffer_info->skb);
2138 buffer_info->skb = NULL;
2140 /* buffer_info must be completely set up in the transmit path */
2144 * e1000_clean_tx_ring - Free Tx Buffers
2145 * @adapter: board private structure
2146 * @tx_ring: ring to be cleaned
2150 e1000_clean_tx_ring(struct e1000_adapter *adapter,
2151 struct e1000_tx_ring *tx_ring)
2153 struct e1000_buffer *buffer_info;
2157 /* Free all the Tx ring sk_buffs */
2159 for (i = 0; i < tx_ring->count; i++) {
2160 buffer_info = &tx_ring->buffer_info[i];
2161 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2164 size = sizeof(struct e1000_buffer) * tx_ring->count;
2165 memset(tx_ring->buffer_info, 0, size);
2167 /* Zero out the descriptor ring */
2169 memset(tx_ring->desc, 0, tx_ring->size);
2171 tx_ring->next_to_use = 0;
2172 tx_ring->next_to_clean = 0;
2173 tx_ring->last_tx_tso = 0;
2175 writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2176 writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2180 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2181 * @adapter: board private structure
2185 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2189 for (i = 0; i < adapter->num_tx_queues; i++)
2190 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2194 * e1000_free_rx_resources - Free Rx Resources
2195 * @adapter: board private structure
2196 * @rx_ring: ring to clean the resources from
2198 * Free all receive software resources
2202 e1000_free_rx_resources(struct e1000_adapter *adapter,
2203 struct e1000_rx_ring *rx_ring)
2205 struct pci_dev *pdev = adapter->pdev;
2207 e1000_clean_rx_ring(adapter, rx_ring);
2209 vfree(rx_ring->buffer_info);
2210 rx_ring->buffer_info = NULL;
2211 kfree(rx_ring->ps_page);
2212 rx_ring->ps_page = NULL;
2213 kfree(rx_ring->ps_page_dma);
2214 rx_ring->ps_page_dma = NULL;
2216 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2218 rx_ring->desc = NULL;
2222 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2223 * @adapter: board private structure
2225 * Free all receive software resources
2229 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2233 for (i = 0; i < adapter->num_rx_queues; i++)
2234 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2238 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2239 * @adapter: board private structure
2240 * @rx_ring: ring to free buffers from
2244 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2245 struct e1000_rx_ring *rx_ring)
2247 struct e1000_buffer *buffer_info;
2248 struct e1000_ps_page *ps_page;
2249 struct e1000_ps_page_dma *ps_page_dma;
2250 struct pci_dev *pdev = adapter->pdev;
2254 /* Free all the Rx ring sk_buffs */
2255 for (i = 0; i < rx_ring->count; i++) {
2256 buffer_info = &rx_ring->buffer_info[i];
2257 if (buffer_info->skb) {
2258 pci_unmap_single(pdev,
2260 buffer_info->length,
2261 PCI_DMA_FROMDEVICE);
2263 dev_kfree_skb(buffer_info->skb);
2264 buffer_info->skb = NULL;
2266 ps_page = &rx_ring->ps_page[i];
2267 ps_page_dma = &rx_ring->ps_page_dma[i];
2268 for (j = 0; j < adapter->rx_ps_pages; j++) {
2269 if (!ps_page->ps_page[j]) break;
2270 pci_unmap_page(pdev,
2271 ps_page_dma->ps_page_dma[j],
2272 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2273 ps_page_dma->ps_page_dma[j] = 0;
2274 put_page(ps_page->ps_page[j]);
2275 ps_page->ps_page[j] = NULL;
2279 size = sizeof(struct e1000_buffer) * rx_ring->count;
2280 memset(rx_ring->buffer_info, 0, size);
2281 size = sizeof(struct e1000_ps_page) * rx_ring->count;
2282 memset(rx_ring->ps_page, 0, size);
2283 size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2284 memset(rx_ring->ps_page_dma, 0, size);
2286 /* Zero out the descriptor ring */
2288 memset(rx_ring->desc, 0, rx_ring->size);
2290 rx_ring->next_to_clean = 0;
2291 rx_ring->next_to_use = 0;
2293 writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2294 writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2298 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2299 * @adapter: board private structure
2303 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2307 for (i = 0; i < adapter->num_rx_queues; i++)
2308 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2311 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2312 * and memory write and invalidate disabled for certain operations
2315 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2317 struct net_device *netdev = adapter->netdev;
2320 e1000_pci_clear_mwi(&adapter->hw);
2322 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2323 rctl |= E1000_RCTL_RST;
2324 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2325 E1000_WRITE_FLUSH(&adapter->hw);
2328 if (netif_running(netdev))
2329 e1000_clean_all_rx_rings(adapter);
2333 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2335 struct net_device *netdev = adapter->netdev;
2338 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2339 rctl &= ~E1000_RCTL_RST;
2340 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2341 E1000_WRITE_FLUSH(&adapter->hw);
2344 if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2345 e1000_pci_set_mwi(&adapter->hw);
2347 if (netif_running(netdev)) {
2348 /* No need to loop, because 82542 supports only 1 queue */
2349 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2350 e1000_configure_rx(adapter);
2351 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2356 * e1000_set_mac - Change the Ethernet Address of the NIC
2357 * @netdev: network interface device structure
2358 * @p: pointer to an address structure
2360 * Returns 0 on success, negative on failure
2364 e1000_set_mac(struct net_device *netdev, void *p)
2366 struct e1000_adapter *adapter = netdev_priv(netdev);
2367 struct sockaddr *addr = p;
2369 if (!is_valid_ether_addr(addr->sa_data))
2370 return -EADDRNOTAVAIL;
2372 /* 82542 2.0 needs to be in reset to write receive address registers */
2374 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2375 e1000_enter_82542_rst(adapter);
2377 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2378 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2380 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2382 /* With 82571 controllers, LAA may be overwritten (with the default)
2383 * due to controller reset from the other port. */
2384 if (adapter->hw.mac_type == e1000_82571) {
2385 /* activate the work around */
2386 adapter->hw.laa_is_present = 1;
2388 /* Hold a copy of the LAA in RAR[14] This is done so that
2389 * between the time RAR[0] gets clobbered and the time it
2390 * gets fixed (in e1000_watchdog), the actual LAA is in one
2391 * of the RARs and no incoming packets directed to this port
2392 * are dropped. Eventaully the LAA will be in RAR[0] and
2394 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2395 E1000_RAR_ENTRIES - 1);
2398 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2399 e1000_leave_82542_rst(adapter);
2405 * e1000_set_multi - Multicast and Promiscuous mode set
2406 * @netdev: network interface device structure
2408 * The set_multi entry point is called whenever the multicast address
2409 * list or the network interface flags are updated. This routine is
2410 * responsible for configuring the hardware for proper multicast,
2411 * promiscuous mode, and all-multi behavior.
2415 e1000_set_multi(struct net_device *netdev)
2417 struct e1000_adapter *adapter = netdev_priv(netdev);
2418 struct e1000_hw *hw = &adapter->hw;
2419 struct dev_mc_list *mc_ptr;
2421 uint32_t hash_value;
2422 int i, rar_entries = E1000_RAR_ENTRIES;
2423 int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2424 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2425 E1000_NUM_MTA_REGISTERS;
2427 if (adapter->hw.mac_type == e1000_ich8lan)
2428 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2430 /* reserve RAR[14] for LAA over-write work-around */
2431 if (adapter->hw.mac_type == e1000_82571)
2434 /* Check for Promiscuous and All Multicast modes */
2436 rctl = E1000_READ_REG(hw, RCTL);
2438 if (netdev->flags & IFF_PROMISC) {
2439 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2440 } else if (netdev->flags & IFF_ALLMULTI) {
2441 rctl |= E1000_RCTL_MPE;
2442 rctl &= ~E1000_RCTL_UPE;
2444 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2447 E1000_WRITE_REG(hw, RCTL, rctl);
2449 /* 82542 2.0 needs to be in reset to write receive address registers */
2451 if (hw->mac_type == e1000_82542_rev2_0)
2452 e1000_enter_82542_rst(adapter);
2454 /* load the first 14 multicast address into the exact filters 1-14
2455 * RAR 0 is used for the station MAC adddress
2456 * if there are not 14 addresses, go ahead and clear the filters
2457 * -- with 82571 controllers only 0-13 entries are filled here
2459 mc_ptr = netdev->mc_list;
2461 for (i = 1; i < rar_entries; i++) {
2463 e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2464 mc_ptr = mc_ptr->next;
2466 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2467 E1000_WRITE_FLUSH(hw);
2468 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2469 E1000_WRITE_FLUSH(hw);
2473 /* clear the old settings from the multicast hash table */
2475 for (i = 0; i < mta_reg_count; i++) {
2476 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2477 E1000_WRITE_FLUSH(hw);
2480 /* load any remaining addresses into the hash table */
2482 for (; mc_ptr; mc_ptr = mc_ptr->next) {
2483 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2484 e1000_mta_set(hw, hash_value);
2487 if (hw->mac_type == e1000_82542_rev2_0)
2488 e1000_leave_82542_rst(adapter);
2491 /* Need to wait a few seconds after link up to get diagnostic information from
2495 e1000_update_phy_info(unsigned long data)
2497 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2498 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2502 * e1000_82547_tx_fifo_stall - Timer Call-back
2503 * @data: pointer to adapter cast into an unsigned long
2507 e1000_82547_tx_fifo_stall(unsigned long data)
2509 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2510 struct net_device *netdev = adapter->netdev;
2513 if (atomic_read(&adapter->tx_fifo_stall)) {
2514 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2515 E1000_READ_REG(&adapter->hw, TDH)) &&
2516 (E1000_READ_REG(&adapter->hw, TDFT) ==
2517 E1000_READ_REG(&adapter->hw, TDFH)) &&
2518 (E1000_READ_REG(&adapter->hw, TDFTS) ==
2519 E1000_READ_REG(&adapter->hw, TDFHS))) {
2520 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2521 E1000_WRITE_REG(&adapter->hw, TCTL,
2522 tctl & ~E1000_TCTL_EN);
2523 E1000_WRITE_REG(&adapter->hw, TDFT,
2524 adapter->tx_head_addr);
2525 E1000_WRITE_REG(&adapter->hw, TDFH,
2526 adapter->tx_head_addr);
2527 E1000_WRITE_REG(&adapter->hw, TDFTS,
2528 adapter->tx_head_addr);
2529 E1000_WRITE_REG(&adapter->hw, TDFHS,
2530 adapter->tx_head_addr);
2531 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2532 E1000_WRITE_FLUSH(&adapter->hw);
2534 adapter->tx_fifo_head = 0;
2535 atomic_set(&adapter->tx_fifo_stall, 0);
2536 netif_wake_queue(netdev);
2538 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2544 * e1000_watchdog - Timer Call-back
2545 * @data: pointer to adapter cast into an unsigned long
2548 e1000_watchdog(unsigned long data)
2550 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2551 struct net_device *netdev = adapter->netdev;
2552 struct e1000_tx_ring *txdr = adapter->tx_ring;
2553 uint32_t link, tctl;
2556 ret_val = e1000_check_for_link(&adapter->hw);
2557 if ((ret_val == E1000_ERR_PHY) &&
2558 (adapter->hw.phy_type == e1000_phy_igp_3) &&
2559 (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2560 /* See e1000_kumeran_lock_loss_workaround() */
2562 "Gigabit has been disabled, downgrading speed\n");
2565 if (adapter->hw.mac_type == e1000_82573) {
2566 e1000_enable_tx_pkt_filtering(&adapter->hw);
2567 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2568 e1000_update_mng_vlan(adapter);
2571 if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2572 !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2573 link = !adapter->hw.serdes_link_down;
2575 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2578 if (!netif_carrier_ok(netdev)) {
2579 boolean_t txb2b = 1;
2580 e1000_get_speed_and_duplex(&adapter->hw,
2581 &adapter->link_speed,
2582 &adapter->link_duplex);
2584 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2585 adapter->link_speed,
2586 adapter->link_duplex == FULL_DUPLEX ?
2587 "Full Duplex" : "Half Duplex");
2589 /* tweak tx_queue_len according to speed/duplex
2590 * and adjust the timeout factor */
2591 netdev->tx_queue_len = adapter->tx_queue_len;
2592 adapter->tx_timeout_factor = 1;
2593 switch (adapter->link_speed) {
2596 netdev->tx_queue_len = 10;
2597 adapter->tx_timeout_factor = 8;
2601 netdev->tx_queue_len = 100;
2602 /* maybe add some timeout factor ? */
2606 if ((adapter->hw.mac_type == e1000_82571 ||
2607 adapter->hw.mac_type == e1000_82572) &&
2610 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2611 tarc0 &= ~(1 << 21);
2612 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2616 /* disable TSO for pcie and 10/100 speeds, to avoid
2617 * some hardware issues */
2618 if (!adapter->tso_force &&
2619 adapter->hw.bus_type == e1000_bus_type_pci_express){
2620 switch (adapter->link_speed) {
2624 "10/100 speed: disabling TSO\n");
2625 netdev->features &= ~NETIF_F_TSO;
2627 netdev->features &= ~NETIF_F_TSO6;
2631 netdev->features |= NETIF_F_TSO;
2633 netdev->features |= NETIF_F_TSO6;
2643 /* enable transmits in the hardware, need to do this
2644 * after setting TARC0 */
2645 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2646 tctl |= E1000_TCTL_EN;
2647 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2649 netif_carrier_on(netdev);
2650 netif_wake_queue(netdev);
2651 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2652 adapter->smartspeed = 0;
2654 /* make sure the receive unit is started */
2655 if (adapter->hw.rx_needs_kicking) {
2656 struct e1000_hw *hw = &adapter->hw;
2657 uint32_t rctl = E1000_READ_REG(hw, RCTL);
2658 E1000_WRITE_REG(hw, RCTL, rctl | E1000_RCTL_EN);
2662 if (netif_carrier_ok(netdev)) {
2663 adapter->link_speed = 0;
2664 adapter->link_duplex = 0;
2665 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2666 netif_carrier_off(netdev);
2667 netif_stop_queue(netdev);
2668 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2670 /* 80003ES2LAN workaround--
2671 * For packet buffer work-around on link down event;
2672 * disable receives in the ISR and
2673 * reset device here in the watchdog
2675 if (adapter->hw.mac_type == e1000_80003es2lan)
2677 schedule_work(&adapter->reset_task);
2680 e1000_smartspeed(adapter);
2683 e1000_update_stats(adapter);
2685 adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2686 adapter->tpt_old = adapter->stats.tpt;
2687 adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2688 adapter->colc_old = adapter->stats.colc;
2690 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2691 adapter->gorcl_old = adapter->stats.gorcl;
2692 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2693 adapter->gotcl_old = adapter->stats.gotcl;
2695 e1000_update_adaptive(&adapter->hw);
2697 if (!netif_carrier_ok(netdev)) {
2698 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2699 /* We've lost link, so the controller stops DMA,
2700 * but we've got queued Tx work that's never going
2701 * to get done, so reset controller to flush Tx.
2702 * (Do the reset outside of interrupt context). */
2703 adapter->tx_timeout_count++;
2704 schedule_work(&adapter->reset_task);
2708 /* Cause software interrupt to ensure rx ring is cleaned */
2709 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2711 /* Force detection of hung controller every watchdog period */
2712 adapter->detect_tx_hung = TRUE;
2714 /* With 82571 controllers, LAA may be overwritten due to controller
2715 * reset from the other port. Set the appropriate LAA in RAR[0] */
2716 if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2717 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2719 /* Reset the timer */
2720 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2723 enum latency_range {
2727 latency_invalid = 255
2731 * e1000_update_itr - update the dynamic ITR value based on statistics
2732 * Stores a new ITR value based on packets and byte
2733 * counts during the last interrupt. The advantage of per interrupt
2734 * computation is faster updates and more accurate ITR for the current
2735 * traffic pattern. Constants in this function were computed
2736 * based on theoretical maximum wire speed and thresholds were set based
2737 * on testing data as well as attempting to minimize response time
2738 * while increasing bulk throughput.
2739 * this functionality is controlled by the InterruptThrottleRate module
2740 * parameter (see e1000_param.c)
2741 * @adapter: pointer to adapter
2742 * @itr_setting: current adapter->itr
2743 * @packets: the number of packets during this measurement interval
2744 * @bytes: the number of bytes during this measurement interval
2746 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2747 uint16_t itr_setting,
2751 unsigned int retval = itr_setting;
2752 struct e1000_hw *hw = &adapter->hw;
2754 if (unlikely(hw->mac_type < e1000_82540))
2755 goto update_itr_done;
2758 goto update_itr_done;
2760 switch (itr_setting) {
2761 case lowest_latency:
2762 /* jumbo frames get bulk treatment*/
2763 if (bytes/packets > 8000)
2764 retval = bulk_latency;
2765 else if ((packets < 5) && (bytes > 512))
2766 retval = low_latency;
2768 case low_latency: /* 50 usec aka 20000 ints/s */
2769 if (bytes > 10000) {
2770 /* jumbo frames need bulk latency setting */
2771 if (bytes/packets > 8000)
2772 retval = bulk_latency;
2773 else if ((packets < 10) || ((bytes/packets) > 1200))
2774 retval = bulk_latency;
2775 else if ((packets > 35))
2776 retval = lowest_latency;
2777 } else if (bytes/packets > 2000)
2778 retval = bulk_latency;
2779 else if (packets <= 2 && bytes < 512)
2780 retval = lowest_latency;
2782 case bulk_latency: /* 250 usec aka 4000 ints/s */
2783 if (bytes > 25000) {
2785 retval = low_latency;
2786 } else if (bytes < 6000) {
2787 retval = low_latency;
2796 static void e1000_set_itr(struct e1000_adapter *adapter)
2798 struct e1000_hw *hw = &adapter->hw;
2799 uint16_t current_itr;
2800 uint32_t new_itr = adapter->itr;
2802 if (unlikely(hw->mac_type < e1000_82540))
2805 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2806 if (unlikely(adapter->link_speed != SPEED_1000)) {
2812 adapter->tx_itr = e1000_update_itr(adapter,
2814 adapter->total_tx_packets,
2815 adapter->total_tx_bytes);
2816 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2817 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2818 adapter->tx_itr = low_latency;
2820 adapter->rx_itr = e1000_update_itr(adapter,
2822 adapter->total_rx_packets,
2823 adapter->total_rx_bytes);
2824 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2825 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2826 adapter->rx_itr = low_latency;
2828 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2830 switch (current_itr) {
2831 /* counts and packets in update_itr are dependent on these numbers */
2832 case lowest_latency:
2836 new_itr = 20000; /* aka hwitr = ~200 */
2846 if (new_itr != adapter->itr) {
2847 /* this attempts to bias the interrupt rate towards Bulk
2848 * by adding intermediate steps when interrupt rate is
2850 new_itr = new_itr > adapter->itr ?
2851 min(adapter->itr + (new_itr >> 2), new_itr) :
2853 adapter->itr = new_itr;
2854 E1000_WRITE_REG(hw, ITR, 1000000000 / (new_itr * 256));
2860 #define E1000_TX_FLAGS_CSUM 0x00000001
2861 #define E1000_TX_FLAGS_VLAN 0x00000002
2862 #define E1000_TX_FLAGS_TSO 0x00000004
2863 #define E1000_TX_FLAGS_IPV4 0x00000008
2864 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2865 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2868 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2869 struct sk_buff *skb)
2872 struct e1000_context_desc *context_desc;
2873 struct e1000_buffer *buffer_info;
2875 uint32_t cmd_length = 0;
2876 uint16_t ipcse = 0, tucse, mss;
2877 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2880 if (skb_is_gso(skb)) {
2881 if (skb_header_cloned(skb)) {
2882 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2887 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2888 mss = skb_shinfo(skb)->gso_size;
2889 if (skb->protocol == htons(ETH_P_IP)) {
2890 skb->nh.iph->tot_len = 0;
2891 skb->nh.iph->check = 0;
2893 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2898 cmd_length = E1000_TXD_CMD_IP;
2899 ipcse = skb->h.raw - skb->data - 1;
2901 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2902 skb->nh.ipv6h->payload_len = 0;
2904 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2905 &skb->nh.ipv6h->daddr,
2912 ipcss = skb->nh.raw - skb->data;
2913 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2914 tucss = skb->h.raw - skb->data;
2915 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2918 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2919 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2921 i = tx_ring->next_to_use;
2922 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2923 buffer_info = &tx_ring->buffer_info[i];
2925 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2926 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2927 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2928 context_desc->upper_setup.tcp_fields.tucss = tucss;
2929 context_desc->upper_setup.tcp_fields.tucso = tucso;
2930 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2931 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2932 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2933 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2935 buffer_info->time_stamp = jiffies;
2936 buffer_info->next_to_watch = i;
2938 if (++i == tx_ring->count) i = 0;
2939 tx_ring->next_to_use = i;
2949 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2950 struct sk_buff *skb)
2952 struct e1000_context_desc *context_desc;
2953 struct e1000_buffer *buffer_info;
2957 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2958 css = skb->h.raw - skb->data;
2960 i = tx_ring->next_to_use;
2961 buffer_info = &tx_ring->buffer_info[i];
2962 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2964 context_desc->upper_setup.tcp_fields.tucss = css;
2965 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum_offset;
2966 context_desc->upper_setup.tcp_fields.tucse = 0;
2967 context_desc->tcp_seg_setup.data = 0;
2968 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2970 buffer_info->time_stamp = jiffies;
2971 buffer_info->next_to_watch = i;
2973 if (unlikely(++i == tx_ring->count)) i = 0;
2974 tx_ring->next_to_use = i;
2982 #define E1000_MAX_TXD_PWR 12
2983 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2986 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2987 struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2988 unsigned int nr_frags, unsigned int mss)
2990 struct e1000_buffer *buffer_info;
2991 unsigned int len = skb->len;
2992 unsigned int offset = 0, size, count = 0, i;
2994 len -= skb->data_len;
2996 i = tx_ring->next_to_use;
2999 buffer_info = &tx_ring->buffer_info[i];
3000 size = min(len, max_per_txd);
3002 /* Workaround for Controller erratum --
3003 * descriptor for non-tso packet in a linear SKB that follows a
3004 * tso gets written back prematurely before the data is fully
3005 * DMA'd to the controller */
3006 if (!skb->data_len && tx_ring->last_tx_tso &&
3008 tx_ring->last_tx_tso = 0;
3012 /* Workaround for premature desc write-backs
3013 * in TSO mode. Append 4-byte sentinel desc */
3014 if (unlikely(mss && !nr_frags && size == len && size > 8))
3017 /* work-around for errata 10 and it applies
3018 * to all controllers in PCI-X mode
3019 * The fix is to make sure that the first descriptor of a
3020 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3022 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3023 (size > 2015) && count == 0))
3026 /* Workaround for potential 82544 hang in PCI-X. Avoid
3027 * terminating buffers within evenly-aligned dwords. */
3028 if (unlikely(adapter->pcix_82544 &&
3029 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3033 buffer_info->length = size;
3035 pci_map_single(adapter->pdev,
3039 buffer_info->time_stamp = jiffies;
3040 buffer_info->next_to_watch = i;
3045 if (unlikely(++i == tx_ring->count)) i = 0;
3048 for (f = 0; f < nr_frags; f++) {
3049 struct skb_frag_struct *frag;
3051 frag = &skb_shinfo(skb)->frags[f];
3053 offset = frag->page_offset;
3056 buffer_info = &tx_ring->buffer_info[i];
3057 size = min(len, max_per_txd);
3059 /* Workaround for premature desc write-backs
3060 * in TSO mode. Append 4-byte sentinel desc */
3061 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3064 /* Workaround for potential 82544 hang in PCI-X.
3065 * Avoid terminating buffers within evenly-aligned
3067 if (unlikely(adapter->pcix_82544 &&
3068 !((unsigned long)(frag->page+offset+size-1) & 4) &&
3072 buffer_info->length = size;
3074 pci_map_page(adapter->pdev,
3079 buffer_info->time_stamp = jiffies;
3080 buffer_info->next_to_watch = i;
3085 if (unlikely(++i == tx_ring->count)) i = 0;
3089 i = (i == 0) ? tx_ring->count - 1 : i - 1;
3090 tx_ring->buffer_info[i].skb = skb;
3091 tx_ring->buffer_info[first].next_to_watch = i;
3097 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3098 int tx_flags, int count)
3100 struct e1000_tx_desc *tx_desc = NULL;
3101 struct e1000_buffer *buffer_info;
3102 uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3105 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3106 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3108 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3110 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3111 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3114 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3115 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3116 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3119 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3120 txd_lower |= E1000_TXD_CMD_VLE;
3121 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3124 i = tx_ring->next_to_use;
3127 buffer_info = &tx_ring->buffer_info[i];
3128 tx_desc = E1000_TX_DESC(*tx_ring, i);
3129 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3130 tx_desc->lower.data =
3131 cpu_to_le32(txd_lower | buffer_info->length);
3132 tx_desc->upper.data = cpu_to_le32(txd_upper);
3133 if (unlikely(++i == tx_ring->count)) i = 0;
3136 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3138 /* Force memory writes to complete before letting h/w
3139 * know there are new descriptors to fetch. (Only
3140 * applicable for weak-ordered memory model archs,
3141 * such as IA-64). */
3144 tx_ring->next_to_use = i;
3145 writel(i, adapter->hw.hw_addr + tx_ring->tdt);
3146 /* we need this if more than one processor can write to our tail
3147 * at a time, it syncronizes IO on IA64/Altix systems */
3152 * 82547 workaround to avoid controller hang in half-duplex environment.
3153 * The workaround is to avoid queuing a large packet that would span
3154 * the internal Tx FIFO ring boundary by notifying the stack to resend
3155 * the packet at a later time. This gives the Tx FIFO an opportunity to
3156 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3157 * to the beginning of the Tx FIFO.
3160 #define E1000_FIFO_HDR 0x10
3161 #define E1000_82547_PAD_LEN 0x3E0
3164 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
3166 uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3167 uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
3169 E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
3171 if (adapter->link_duplex != HALF_DUPLEX)
3172 goto no_fifo_stall_required;
3174 if (atomic_read(&adapter->tx_fifo_stall))
3177 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3178 atomic_set(&adapter->tx_fifo_stall, 1);
3182 no_fifo_stall_required:
3183 adapter->tx_fifo_head += skb_fifo_len;
3184 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3185 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3189 #define MINIMUM_DHCP_PACKET_SIZE 282
3191 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
3193 struct e1000_hw *hw = &adapter->hw;
3194 uint16_t length, offset;
3195 if (vlan_tx_tag_present(skb)) {
3196 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
3197 ( adapter->hw.mng_cookie.status &
3198 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3201 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3202 struct ethhdr *eth = (struct ethhdr *) skb->data;
3203 if ((htons(ETH_P_IP) == eth->h_proto)) {
3204 const struct iphdr *ip =
3205 (struct iphdr *)((uint8_t *)skb->data+14);
3206 if (IPPROTO_UDP == ip->protocol) {
3207 struct udphdr *udp =
3208 (struct udphdr *)((uint8_t *)ip +
3210 if (ntohs(udp->dest) == 67) {
3211 offset = (uint8_t *)udp + 8 - skb->data;
3212 length = skb->len - offset;
3214 return e1000_mng_write_dhcp_info(hw,
3224 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3226 struct e1000_adapter *adapter = netdev_priv(netdev);
3227 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3229 netif_stop_queue(netdev);
3230 /* Herbert's original patch had:
3231 * smp_mb__after_netif_stop_queue();
3232 * but since that doesn't exist yet, just open code it. */
3235 /* We need to check again in a case another CPU has just
3236 * made room available. */
3237 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3241 netif_start_queue(netdev);
3242 ++adapter->restart_queue;
3246 static int e1000_maybe_stop_tx(struct net_device *netdev,
3247 struct e1000_tx_ring *tx_ring, int size)
3249 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3251 return __e1000_maybe_stop_tx(netdev, size);
3254 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3256 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3258 struct e1000_adapter *adapter = netdev_priv(netdev);
3259 struct e1000_tx_ring *tx_ring;
3260 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3261 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3262 unsigned int tx_flags = 0;
3263 unsigned int len = skb->len;
3264 unsigned long flags;
3265 unsigned int nr_frags = 0;
3266 unsigned int mss = 0;
3270 len -= skb->data_len;
3272 /* This goes back to the question of how to logically map a tx queue
3273 * to a flow. Right now, performance is impacted slightly negatively
3274 * if using multiple tx queues. If the stack breaks away from a
3275 * single qdisc implementation, we can look at this again. */
3276 tx_ring = adapter->tx_ring;
3278 if (unlikely(skb->len <= 0)) {
3279 dev_kfree_skb_any(skb);
3280 return NETDEV_TX_OK;
3283 /* 82571 and newer doesn't need the workaround that limited descriptor
3285 if (adapter->hw.mac_type >= e1000_82571)
3289 mss = skb_shinfo(skb)->gso_size;
3290 /* The controller does a simple calculation to
3291 * make sure there is enough room in the FIFO before
3292 * initiating the DMA for each buffer. The calc is:
3293 * 4 = ceil(buffer len/mss). To make sure we don't
3294 * overrun the FIFO, adjust the max buffer len if mss
3298 max_per_txd = min(mss << 2, max_per_txd);
3299 max_txd_pwr = fls(max_per_txd) - 1;
3301 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3302 * points to just header, pull a few bytes of payload from
3303 * frags into skb->data */
3304 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
3305 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
3306 switch (adapter->hw.mac_type) {
3307 unsigned int pull_size;
3312 pull_size = min((unsigned int)4, skb->data_len);
3313 if (!__pskb_pull_tail(skb, pull_size)) {
3315 "__pskb_pull_tail failed.\n");
3316 dev_kfree_skb_any(skb);
3317 return NETDEV_TX_OK;
3319 len = skb->len - skb->data_len;
3328 /* reserve a descriptor for the offload context */
3329 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3333 if (skb->ip_summed == CHECKSUM_PARTIAL)
3338 /* Controller Erratum workaround */
3339 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3343 count += TXD_USE_COUNT(len, max_txd_pwr);
3345 if (adapter->pcix_82544)
3348 /* work-around for errata 10 and it applies to all controllers
3349 * in PCI-X mode, so add one more descriptor to the count
3351 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3355 nr_frags = skb_shinfo(skb)->nr_frags;
3356 for (f = 0; f < nr_frags; f++)
3357 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3359 if (adapter->pcix_82544)
3363 if (adapter->hw.tx_pkt_filtering &&
3364 (adapter->hw.mac_type == e1000_82573))
3365 e1000_transfer_dhcp_info(adapter, skb);
3367 local_irq_save(flags);
3368 if (!spin_trylock(&tx_ring->tx_lock)) {
3369 /* Collision - tell upper layer to requeue */
3370 local_irq_restore(flags);
3371 return NETDEV_TX_LOCKED;
3374 /* need: count + 2 desc gap to keep tail from touching
3375 * head, otherwise try next time */
3376 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3377 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3378 return NETDEV_TX_BUSY;
3381 if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3382 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3383 netif_stop_queue(netdev);
3384 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3385 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3386 return NETDEV_TX_BUSY;
3390 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3391 tx_flags |= E1000_TX_FLAGS_VLAN;
3392 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3395 first = tx_ring->next_to_use;
3397 tso = e1000_tso(adapter, tx_ring, skb);
3399 dev_kfree_skb_any(skb);
3400 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3401 return NETDEV_TX_OK;
3405 tx_ring->last_tx_tso = 1;
3406 tx_flags |= E1000_TX_FLAGS_TSO;
3407 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3408 tx_flags |= E1000_TX_FLAGS_CSUM;
3410 /* Old method was to assume IPv4 packet by default if TSO was enabled.
3411 * 82571 hardware supports TSO capabilities for IPv6 as well...
3412 * no longer assume, we must. */
3413 if (likely(skb->protocol == htons(ETH_P_IP)))
3414 tx_flags |= E1000_TX_FLAGS_IPV4;
3416 e1000_tx_queue(adapter, tx_ring, tx_flags,
3417 e1000_tx_map(adapter, tx_ring, skb, first,
3418 max_per_txd, nr_frags, mss));
3420 netdev->trans_start = jiffies;
3422 /* Make sure there is space in the ring for the next send. */
3423 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3425 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3426 return NETDEV_TX_OK;
3430 * e1000_tx_timeout - Respond to a Tx Hang
3431 * @netdev: network interface device structure
3435 e1000_tx_timeout(struct net_device *netdev)
3437 struct e1000_adapter *adapter = netdev_priv(netdev);
3439 /* Do the reset outside of interrupt context */
3440 adapter->tx_timeout_count++;
3441 schedule_work(&adapter->reset_task);
3445 e1000_reset_task(struct work_struct *work)
3447 struct e1000_adapter *adapter =
3448 container_of(work, struct e1000_adapter, reset_task);
3450 e1000_reinit_locked(adapter);
3454 * e1000_get_stats - Get System Network Statistics
3455 * @netdev: network interface device structure
3457 * Returns the address of the device statistics structure.
3458 * The statistics are actually updated from the timer callback.
3461 static struct net_device_stats *
3462 e1000_get_stats(struct net_device *netdev)
3464 struct e1000_adapter *adapter = netdev_priv(netdev);
3466 /* only return the current stats */
3467 return &adapter->net_stats;
3471 * e1000_change_mtu - Change the Maximum Transfer Unit
3472 * @netdev: network interface device structure
3473 * @new_mtu: new value for maximum frame size
3475 * Returns 0 on success, negative on failure
3479 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3481 struct e1000_adapter *adapter = netdev_priv(netdev);
3482 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3483 uint16_t eeprom_data = 0;
3485 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3486 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3487 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3491 /* Adapter-specific max frame size limits. */
3492 switch (adapter->hw.mac_type) {
3493 case e1000_undefined ... e1000_82542_rev2_1:
3495 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3496 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3501 /* Jumbo Frames not supported if:
3502 * - this is not an 82573L device
3503 * - ASPM is enabled in any way (0x1A bits 3:2) */
3504 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3506 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3507 (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3508 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3510 "Jumbo Frames not supported.\n");
3515 /* ERT will be enabled later to enable wire speed receives */
3517 /* fall through to get support */
3520 case e1000_80003es2lan:
3521 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3522 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3523 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3528 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3532 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3533 * means we reserve 2 more, this pushes us to allocate from the next
3535 * i.e. RXBUFFER_2048 --> size-4096 slab */
3537 if (max_frame <= E1000_RXBUFFER_256)
3538 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3539 else if (max_frame <= E1000_RXBUFFER_512)
3540 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3541 else if (max_frame <= E1000_RXBUFFER_1024)
3542 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3543 else if (max_frame <= E1000_RXBUFFER_2048)
3544 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3545 else if (max_frame <= E1000_RXBUFFER_4096)
3546 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3547 else if (max_frame <= E1000_RXBUFFER_8192)
3548 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3549 else if (max_frame <= E1000_RXBUFFER_16384)
3550 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3552 /* adjust allocation if LPE protects us, and we aren't using SBP */
3553 if (!adapter->hw.tbi_compatibility_on &&
3554 ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3555 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3556 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3558 netdev->mtu = new_mtu;
3559 adapter->hw.max_frame_size = max_frame;
3561 if (netif_running(netdev))
3562 e1000_reinit_locked(adapter);
3568 * e1000_update_stats - Update the board statistics counters
3569 * @adapter: board private structure
3573 e1000_update_stats(struct e1000_adapter *adapter)
3575 struct e1000_hw *hw = &adapter->hw;
3576 struct pci_dev *pdev = adapter->pdev;
3577 unsigned long flags;
3580 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3583 * Prevent stats update while adapter is being reset, or if the pci
3584 * connection is down.
3586 if (adapter->link_speed == 0)
3588 if (pdev->error_state && pdev->error_state != pci_channel_io_normal)
3591 spin_lock_irqsave(&adapter->stats_lock, flags);
3593 /* these counters are modified from e1000_adjust_tbi_stats,
3594 * called from the interrupt context, so they must only
3595 * be written while holding adapter->stats_lock
3598 adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3599 adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3600 adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3601 adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3602 adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3603 adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3604 adapter->stats.roc += E1000_READ_REG(hw, ROC);
3606 if (adapter->hw.mac_type != e1000_ich8lan) {
3607 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3608 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3609 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3610 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3611 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3612 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3615 adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3616 adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3617 adapter->stats.scc += E1000_READ_REG(hw, SCC);
3618 adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3619 adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3620 adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3621 adapter->stats.dc += E1000_READ_REG(hw, DC);
3622 adapter->stats.sec += E1000_READ_REG(hw, SEC);
3623 adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3624 adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3625 adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3626 adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3627 adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3628 adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3629 adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3630 adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3631 adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3632 adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3633 adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3634 adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3635 adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3636 adapter->stats.torl += E1000_READ_REG(hw, TORL);
3637 adapter->stats.torh += E1000_READ_REG(hw, TORH);
3638 adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3639 adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3640 adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3642 if (adapter->hw.mac_type != e1000_ich8lan) {
3643 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3644 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3645 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3646 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3647 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3648 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3651 adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3652 adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3654 /* used for adaptive IFS */
3656 hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3657 adapter->stats.tpt += hw->tx_packet_delta;
3658 hw->collision_delta = E1000_READ_REG(hw, COLC);
3659 adapter->stats.colc += hw->collision_delta;
3661 if (hw->mac_type >= e1000_82543) {
3662 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3663 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3664 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3665 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3666 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3667 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3669 if (hw->mac_type > e1000_82547_rev_2) {
3670 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3671 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3673 if (adapter->hw.mac_type != e1000_ich8lan) {
3674 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3675 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3676 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3677 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3678 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3679 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3680 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3684 /* Fill out the OS statistics structure */
3685 adapter->net_stats.rx_packets = adapter->stats.gprc;
3686 adapter->net_stats.tx_packets = adapter->stats.gptc;
3687 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3688 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3689 adapter->net_stats.multicast = adapter->stats.mprc;
3690 adapter->net_stats.collisions = adapter->stats.colc;
3694 /* RLEC on some newer hardware can be incorrect so build
3695 * our own version based on RUC and ROC */
3696 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3697 adapter->stats.crcerrs + adapter->stats.algnerrc +
3698 adapter->stats.ruc + adapter->stats.roc +
3699 adapter->stats.cexterr;
3700 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3701 adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3702 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3703 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3704 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3707 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3708 adapter->net_stats.tx_errors = adapter->stats.txerrc;
3709 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3710 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3711 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3712 if (adapter->hw.bad_tx_carr_stats_fd &&
3713 adapter->link_duplex == FULL_DUPLEX) {
3714 adapter->net_stats.tx_carrier_errors = 0;
3715 adapter->stats.tncrs = 0;
3718 /* Tx Dropped needs to be maintained elsewhere */
3721 if (hw->media_type == e1000_media_type_copper) {
3722 if ((adapter->link_speed == SPEED_1000) &&
3723 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3724 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3725 adapter->phy_stats.idle_errors += phy_tmp;
3728 if ((hw->mac_type <= e1000_82546) &&
3729 (hw->phy_type == e1000_phy_m88) &&
3730 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3731 adapter->phy_stats.receive_errors += phy_tmp;
3734 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3736 #ifdef CONFIG_PCI_MSI
3739 * e1000_intr_msi - Interrupt Handler
3740 * @irq: interrupt number
3741 * @data: pointer to a network interface device structure
3745 irqreturn_t e1000_intr_msi(int irq, void *data)
3747 struct net_device *netdev = data;
3748 struct e1000_adapter *adapter = netdev_priv(netdev);
3749 struct e1000_hw *hw = &adapter->hw;
3750 #ifndef CONFIG_E1000_NAPI
3754 /* this code avoids the read of ICR but has to get 1000 interrupts
3755 * at every link change event before it will notice the change */
3756 if (++adapter->detect_link >= 1000) {
3757 uint32_t icr = E1000_READ_REG(hw, ICR);
3758 #ifdef CONFIG_E1000_NAPI
3759 /* read ICR disables interrupts using IAM, so keep up with our
3760 * enable/disable accounting */
3761 atomic_inc(&adapter->irq_sem);
3763 adapter->detect_link = 0;
3764 if ((icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) &&
3765 (icr & E1000_ICR_INT_ASSERTED)) {
3766 hw->get_link_status = 1;
3767 /* 80003ES2LAN workaround--
3768 * For packet buffer work-around on link down event;
3769 * disable receives here in the ISR and
3770 * reset adapter in watchdog
3772 if (netif_carrier_ok(netdev) &&
3773 (adapter->hw.mac_type == e1000_80003es2lan)) {
3774 /* disable receives */
3775 uint32_t rctl = E1000_READ_REG(hw, RCTL);
3776 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3778 /* guard against interrupt when we're going down */
3779 if (!test_bit(__E1000_DOWN, &adapter->flags))
3780 mod_timer(&adapter->watchdog_timer,
3784 E1000_WRITE_REG(hw, ICR, (0xffffffff & ~(E1000_ICR_RXSEQ |
3786 /* bummer we have to flush here, but things break otherwise as
3787 * some event appears to be lost or delayed and throughput
3788 * drops. In almost all tests this flush is un-necessary */
3789 E1000_WRITE_FLUSH(hw);
3790 #ifdef CONFIG_E1000_NAPI
3791 /* Interrupt Auto-Mask (IAM)...upon writing ICR, interrupts are
3792 * masked. No need for the IMC write, but it does mean we
3793 * should account for it ASAP. */
3794 atomic_inc(&adapter->irq_sem);
3798 #ifdef CONFIG_E1000_NAPI
3799 if (likely(netif_rx_schedule_prep(netdev))) {
3800 adapter->total_tx_bytes = 0;
3801 adapter->total_tx_packets = 0;
3802 adapter->total_rx_bytes = 0;
3803 adapter->total_rx_packets = 0;
3804 __netif_rx_schedule(netdev);
3806 e1000_irq_enable(adapter);
3808 adapter->total_tx_bytes = 0;
3809 adapter->total_rx_bytes = 0;
3810 adapter->total_tx_packets = 0;
3811 adapter->total_rx_packets = 0;
3813 for (i = 0; i < E1000_MAX_INTR; i++)
3814 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3815 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3818 if (likely(adapter->itr_setting & 3))
3819 e1000_set_itr(adapter);
3827 * e1000_intr - Interrupt Handler
3828 * @irq: interrupt number
3829 * @data: pointer to a network interface device structure
3833 e1000_intr(int irq, void *data)
3835 struct net_device *netdev = data;
3836 struct e1000_adapter *adapter = netdev_priv(netdev);
3837 struct e1000_hw *hw = &adapter->hw;
3838 uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3839 #ifndef CONFIG_E1000_NAPI
3843 return IRQ_NONE; /* Not our interrupt */
3845 #ifdef CONFIG_E1000_NAPI
3846 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3847 * not set, then the adapter didn't send an interrupt */
3848 if (unlikely(hw->mac_type >= e1000_82571 &&
3849 !(icr & E1000_ICR_INT_ASSERTED)))
3852 /* Interrupt Auto-Mask...upon reading ICR,
3853 * interrupts are masked. No need for the
3854 * IMC write, but it does mean we should
3855 * account for it ASAP. */
3856 if (likely(hw->mac_type >= e1000_82571))
3857 atomic_inc(&adapter->irq_sem);
3860 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3861 hw->get_link_status = 1;
3862 /* 80003ES2LAN workaround--
3863 * For packet buffer work-around on link down event;
3864 * disable receives here in the ISR and
3865 * reset adapter in watchdog
3867 if (netif_carrier_ok(netdev) &&
3868 (adapter->hw.mac_type == e1000_80003es2lan)) {
3869 /* disable receives */
3870 rctl = E1000_READ_REG(hw, RCTL);
3871 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3873 /* guard against interrupt when we're going down */
3874 if (!test_bit(__E1000_DOWN, &adapter->flags))
3875 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3878 #ifdef CONFIG_E1000_NAPI
3879 if (unlikely(hw->mac_type < e1000_82571)) {
3880 /* disable interrupts, without the synchronize_irq bit */
3881 atomic_inc(&adapter->irq_sem);
3882 E1000_WRITE_REG(hw, IMC, ~0);
3883 E1000_WRITE_FLUSH(hw);
3885 if (likely(netif_rx_schedule_prep(netdev))) {
3886 adapter->total_tx_bytes = 0;
3887 adapter->total_tx_packets = 0;
3888 adapter->total_rx_bytes = 0;
3889 adapter->total_rx_packets = 0;
3890 __netif_rx_schedule(netdev);
3892 /* this really should not happen! if it does it is basically a
3893 * bug, but not a hard error, so enable ints and continue */
3894 e1000_irq_enable(adapter);
3896 /* Writing IMC and IMS is needed for 82547.
3897 * Due to Hub Link bus being occupied, an interrupt
3898 * de-assertion message is not able to be sent.
3899 * When an interrupt assertion message is generated later,
3900 * two messages are re-ordered and sent out.
3901 * That causes APIC to think 82547 is in de-assertion
3902 * state, while 82547 is in assertion state, resulting
3903 * in dead lock. Writing IMC forces 82547 into
3904 * de-assertion state.
3906 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3907 atomic_inc(&adapter->irq_sem);
3908 E1000_WRITE_REG(hw, IMC, ~0);
3911 adapter->total_tx_bytes = 0;
3912 adapter->total_rx_bytes = 0;
3913 adapter->total_tx_packets = 0;
3914 adapter->total_rx_packets = 0;
3916 for (i = 0; i < E1000_MAX_INTR; i++)
3917 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3918 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3921 if (likely(adapter->itr_setting & 3))
3922 e1000_set_itr(adapter);
3924 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3925 e1000_irq_enable(adapter);
3931 #ifdef CONFIG_E1000_NAPI
3933 * e1000_clean - NAPI Rx polling callback
3934 * @adapter: board private structure
3938 e1000_clean(struct net_device *poll_dev, int *budget)
3940 struct e1000_adapter *adapter;
3941 int work_to_do = min(*budget, poll_dev->quota);
3942 int tx_cleaned = 0, work_done = 0;
3944 /* Must NOT use netdev_priv macro here. */
3945 adapter = poll_dev->priv;
3947 /* Keep link state information with original netdev */
3948 if (!netif_carrier_ok(poll_dev))
3951 /* e1000_clean is called per-cpu. This lock protects
3952 * tx_ring[0] from being cleaned by multiple cpus
3953 * simultaneously. A failure obtaining the lock means
3954 * tx_ring[0] is currently being cleaned anyway. */
3955 if (spin_trylock(&adapter->tx_queue_lock)) {
3956 tx_cleaned = e1000_clean_tx_irq(adapter,
3957 &adapter->tx_ring[0]);
3958 spin_unlock(&adapter->tx_queue_lock);
3961 adapter->clean_rx(adapter, &adapter->rx_ring[0],
3962 &work_done, work_to_do);
3964 *budget -= work_done;
3965 poll_dev->quota -= work_done;
3967 /* If no Tx and not enough Rx work done, exit the polling mode */
3968 if ((!tx_cleaned && (work_done == 0)) ||
3969 !netif_running(poll_dev)) {
3971 if (likely(adapter->itr_setting & 3))
3972 e1000_set_itr(adapter);
3973 netif_rx_complete(poll_dev);
3974 e1000_irq_enable(adapter);
3983 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3984 * @adapter: board private structure
3988 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3989 struct e1000_tx_ring *tx_ring)
3991 struct net_device *netdev = adapter->netdev;
3992 struct e1000_tx_desc *tx_desc, *eop_desc;
3993 struct e1000_buffer *buffer_info;
3994 unsigned int i, eop;
3995 #ifdef CONFIG_E1000_NAPI
3996 unsigned int count = 0;
3998 boolean_t cleaned = FALSE;
3999 unsigned int total_tx_bytes=0, total_tx_packets=0;
4001 i = tx_ring->next_to_clean;
4002 eop = tx_ring->buffer_info[i].next_to_watch;
4003 eop_desc = E1000_TX_DESC(*tx_ring, eop);
4005 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
4006 for (cleaned = FALSE; !cleaned; ) {
4007 tx_desc = E1000_TX_DESC(*tx_ring, i);
4008 buffer_info = &tx_ring->buffer_info[i];
4009 cleaned = (i == eop);
4012 struct sk_buff *skb = buffer_info->skb;
4013 unsigned int segs = skb_shinfo(skb)->gso_segs;
4014 total_tx_packets += segs;
4016 total_tx_bytes += skb->len;
4018 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
4019 tx_desc->upper.data = 0;
4021 if (unlikely(++i == tx_ring->count)) i = 0;
4024 eop = tx_ring->buffer_info[i].next_to_watch;
4025 eop_desc = E1000_TX_DESC(*tx_ring, eop);
4026 #ifdef CONFIG_E1000_NAPI
4027 #define E1000_TX_WEIGHT 64
4028 /* weight of a sort for tx, to avoid endless transmit cleanup */
4029 if (count++ == E1000_TX_WEIGHT) break;
4033 tx_ring->next_to_clean = i;
4035 #define TX_WAKE_THRESHOLD 32
4036 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
4037 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
4038 /* Make sure that anybody stopping the queue after this
4039 * sees the new next_to_clean.
4042 if (netif_queue_stopped(netdev)) {
4043 netif_wake_queue(netdev);
4044 ++adapter->restart_queue;
4048 if (adapter->detect_tx_hung) {
4049 /* Detect a transmit hang in hardware, this serializes the
4050 * check with the clearing of time_stamp and movement of i */
4051 adapter->detect_tx_hung = FALSE;
4052 if (tx_ring->buffer_info[eop].dma &&
4053 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
4054 (adapter->tx_timeout_factor * HZ))
4055 && !(E1000_READ_REG(&adapter->hw, STATUS) &
4056 E1000_STATUS_TXOFF)) {
4058 /* detected Tx unit hang */
4059 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
4063 " next_to_use <%x>\n"
4064 " next_to_clean <%x>\n"
4065 "buffer_info[next_to_clean]\n"
4066 " time_stamp <%lx>\n"
4067 " next_to_watch <%x>\n"
4069 " next_to_watch.status <%x>\n",
4070 (unsigned long)((tx_ring - adapter->tx_ring) /
4071 sizeof(struct e1000_tx_ring)),
4072 readl(adapter->hw.hw_addr + tx_ring->tdh),
4073 readl(adapter->hw.hw_addr + tx_ring->tdt),
4074 tx_ring->next_to_use,
4075 tx_ring->next_to_clean,
4076 tx_ring->buffer_info[eop].time_stamp,
4079 eop_desc->upper.fields.status);
4080 netif_stop_queue(netdev);
4083 adapter->total_tx_bytes += total_tx_bytes;
4084 adapter->total_tx_packets += total_tx_packets;
4089 * e1000_rx_checksum - Receive Checksum Offload for 82543
4090 * @adapter: board private structure
4091 * @status_err: receive descriptor status and error fields
4092 * @csum: receive descriptor csum field
4093 * @sk_buff: socket buffer with received data
4097 e1000_rx_checksum(struct e1000_adapter *adapter,
4098 uint32_t status_err, uint32_t csum,
4099 struct sk_buff *skb)
4101 uint16_t status = (uint16_t)status_err;
4102 uint8_t errors = (uint8_t)(status_err >> 24);
4103 skb->ip_summed = CHECKSUM_NONE;
4105 /* 82543 or newer only */
4106 if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
4107 /* Ignore Checksum bit is set */
4108 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
4109 /* TCP/UDP checksum error bit is set */
4110 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4111 /* let the stack verify checksum errors */
4112 adapter->hw_csum_err++;
4115 /* TCP/UDP Checksum has not been calculated */
4116 if (adapter->hw.mac_type <= e1000_82547_rev_2) {
4117 if (!(status & E1000_RXD_STAT_TCPCS))
4120 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
4123 /* It must be a TCP or UDP packet with a valid checksum */
4124 if (likely(status & E1000_RXD_STAT_TCPCS)) {
4125 /* TCP checksum is good */
4126 skb->ip_summed = CHECKSUM_UNNECESSARY;
4127 } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
4128 /* IP fragment with UDP payload */
4129 /* Hardware complements the payload checksum, so we undo it
4130 * and then put the value in host order for further stack use.
4132 csum = ntohl(csum ^ 0xFFFF);
4134 skb->ip_summed = CHECKSUM_COMPLETE;
4136 adapter->hw_csum_good++;
4140 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4141 * @adapter: board private structure
4145 #ifdef CONFIG_E1000_NAPI
4146 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4147 struct e1000_rx_ring *rx_ring,
4148 int *work_done, int work_to_do)
4150 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4151 struct e1000_rx_ring *rx_ring)
4154 struct net_device *netdev = adapter->netdev;
4155 struct pci_dev *pdev = adapter->pdev;
4156 struct e1000_rx_desc *rx_desc, *next_rxd;
4157 struct e1000_buffer *buffer_info, *next_buffer;
4158 unsigned long flags;
4162 int cleaned_count = 0;
4163 boolean_t cleaned = FALSE;
4164 unsigned int total_rx_bytes=0, total_rx_packets=0;
4166 i = rx_ring->next_to_clean;
4167 rx_desc = E1000_RX_DESC(*rx_ring, i);
4168 buffer_info = &rx_ring->buffer_info[i];
4170 while (rx_desc->status & E1000_RXD_STAT_DD) {
4171 struct sk_buff *skb;
4174 #ifdef CONFIG_E1000_NAPI
4175 if (*work_done >= work_to_do)
4179 status = rx_desc->status;
4180 skb = buffer_info->skb;
4181 buffer_info->skb = NULL;
4183 prefetch(skb->data - NET_IP_ALIGN);
4185 if (++i == rx_ring->count) i = 0;
4186 next_rxd = E1000_RX_DESC(*rx_ring, i);
4189 next_buffer = &rx_ring->buffer_info[i];
4193 pci_unmap_single(pdev,
4195 buffer_info->length,
4196 PCI_DMA_FROMDEVICE);
4198 length = le16_to_cpu(rx_desc->length);
4200 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4201 /* All receives must fit into a single buffer */
4202 E1000_DBG("%s: Receive packet consumed multiple"
4203 " buffers\n", netdev->name);
4205 buffer_info->skb = skb;
4209 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4210 last_byte = *(skb->data + length - 1);
4211 if (TBI_ACCEPT(&adapter->hw, status,
4212 rx_desc->errors, length, last_byte)) {
4213 spin_lock_irqsave(&adapter->stats_lock, flags);
4214 e1000_tbi_adjust_stats(&adapter->hw,
4217 spin_unlock_irqrestore(&adapter->stats_lock,
4222 buffer_info->skb = skb;
4227 /* adjust length to remove Ethernet CRC, this must be
4228 * done after the TBI_ACCEPT workaround above */
4231 /* probably a little skewed due to removing CRC */
4232 total_rx_bytes += length;
4235 /* code added for copybreak, this should improve
4236 * performance for small packets with large amounts
4237 * of reassembly being done in the stack */
4238 #define E1000_CB_LENGTH 256
4239 if (length < E1000_CB_LENGTH) {
4240 struct sk_buff *new_skb =
4241 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4243 skb_reserve(new_skb, NET_IP_ALIGN);
4244 memcpy(new_skb->data - NET_IP_ALIGN,
4245 skb->data - NET_IP_ALIGN,
4246 length + NET_IP_ALIGN);
4247 /* save the skb in buffer_info as good */
4248 buffer_info->skb = skb;
4251 /* else just continue with the old one */
4253 /* end copybreak code */
4254 skb_put(skb, length);
4256 /* Receive Checksum Offload */
4257 e1000_rx_checksum(adapter,
4258 (uint32_t)(status) |
4259 ((uint32_t)(rx_desc->errors) << 24),
4260 le16_to_cpu(rx_desc->csum), skb);
4262 skb->protocol = eth_type_trans(skb, netdev);
4263 #ifdef CONFIG_E1000_NAPI
4264 if (unlikely(adapter->vlgrp &&
4265 (status & E1000_RXD_STAT_VP))) {
4266 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4267 le16_to_cpu(rx_desc->special) &
4268 E1000_RXD_SPC_VLAN_MASK);
4270 netif_receive_skb(skb);
4272 #else /* CONFIG_E1000_NAPI */
4273 if (unlikely(adapter->vlgrp &&
4274 (status & E1000_RXD_STAT_VP))) {
4275 vlan_hwaccel_rx(skb, adapter->vlgrp,
4276 le16_to_cpu(rx_desc->special) &
4277 E1000_RXD_SPC_VLAN_MASK);
4281 #endif /* CONFIG_E1000_NAPI */
4282 netdev->last_rx = jiffies;
4285 rx_desc->status = 0;
4287 /* return some buffers to hardware, one at a time is too slow */
4288 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4289 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4293 /* use prefetched values */
4295 buffer_info = next_buffer;
4297 rx_ring->next_to_clean = i;
4299 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4301 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4303 adapter->total_rx_packets += total_rx_packets;
4304 adapter->total_rx_bytes += total_rx_bytes;
4309 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4310 * @adapter: board private structure
4314 #ifdef CONFIG_E1000_NAPI
4315 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4316 struct e1000_rx_ring *rx_ring,
4317 int *work_done, int work_to_do)
4319 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4320 struct e1000_rx_ring *rx_ring)
4323 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
4324 struct net_device *netdev = adapter->netdev;
4325 struct pci_dev *pdev = adapter->pdev;
4326 struct e1000_buffer *buffer_info, *next_buffer;
4327 struct e1000_ps_page *ps_page;
4328 struct e1000_ps_page_dma *ps_page_dma;
4329 struct sk_buff *skb;
4331 uint32_t length, staterr;
4332 int cleaned_count = 0;
4333 boolean_t cleaned = FALSE;
4334 unsigned int total_rx_bytes=0, total_rx_packets=0;
4336 i = rx_ring->next_to_clean;
4337 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4338 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4339 buffer_info = &rx_ring->buffer_info[i];
4341 while (staterr & E1000_RXD_STAT_DD) {
4342 ps_page = &rx_ring->ps_page[i];
4343 ps_page_dma = &rx_ring->ps_page_dma[i];
4344 #ifdef CONFIG_E1000_NAPI
4345 if (unlikely(*work_done >= work_to_do))
4349 skb = buffer_info->skb;
4351 /* in the packet split case this is header only */
4352 prefetch(skb->data - NET_IP_ALIGN);
4354 if (++i == rx_ring->count) i = 0;
4355 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
4358 next_buffer = &rx_ring->buffer_info[i];
4362 pci_unmap_single(pdev, buffer_info->dma,
4363 buffer_info->length,
4364 PCI_DMA_FROMDEVICE);
4366 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
4367 E1000_DBG("%s: Packet Split buffers didn't pick up"
4368 " the full packet\n", netdev->name);
4369 dev_kfree_skb_irq(skb);
4373 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
4374 dev_kfree_skb_irq(skb);
4378 length = le16_to_cpu(rx_desc->wb.middle.length0);
4380 if (unlikely(!length)) {
4381 E1000_DBG("%s: Last part of the packet spanning"
4382 " multiple descriptors\n", netdev->name);
4383 dev_kfree_skb_irq(skb);
4388 skb_put(skb, length);
4391 /* this looks ugly, but it seems compiler issues make it
4392 more efficient than reusing j */
4393 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4395 /* page alloc/put takes too long and effects small packet
4396 * throughput, so unsplit small packets and save the alloc/put*/
4397 if (l1 && ((length + l1) <= adapter->rx_ps_bsize0)) {
4399 /* there is no documentation about how to call
4400 * kmap_atomic, so we can't hold the mapping
4402 pci_dma_sync_single_for_cpu(pdev,
4403 ps_page_dma->ps_page_dma[0],
4405 PCI_DMA_FROMDEVICE);
4406 vaddr = kmap_atomic(ps_page->ps_page[0],
4407 KM_SKB_DATA_SOFTIRQ);
4408 memcpy(skb->tail, vaddr, l1);
4409 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4410 pci_dma_sync_single_for_device(pdev,
4411 ps_page_dma->ps_page_dma[0],
4412 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4413 /* remove the CRC */
4420 for (j = 0; j < adapter->rx_ps_pages; j++) {
4421 if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
4423 pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4424 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4425 ps_page_dma->ps_page_dma[j] = 0;
4426 skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4428 ps_page->ps_page[j] = NULL;
4430 skb->data_len += length;
4431 skb->truesize += length;
4434 /* strip the ethernet crc, problem is we're using pages now so
4435 * this whole operation can get a little cpu intensive */
4436 pskb_trim(skb, skb->len - 4);
4439 total_rx_bytes += skb->len;
4442 e1000_rx_checksum(adapter, staterr,
4443 le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4444 skb->protocol = eth_type_trans(skb, netdev);
4446 if (likely(rx_desc->wb.upper.header_status &
4447 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4448 adapter->rx_hdr_split++;
4449 #ifdef CONFIG_E1000_NAPI
4450 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4451 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4452 le16_to_cpu(rx_desc->wb.middle.vlan) &
4453 E1000_RXD_SPC_VLAN_MASK);
4455 netif_receive_skb(skb);
4457 #else /* CONFIG_E1000_NAPI */
4458 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4459 vlan_hwaccel_rx(skb, adapter->vlgrp,
4460 le16_to_cpu(rx_desc->wb.middle.vlan) &
4461 E1000_RXD_SPC_VLAN_MASK);
4465 #endif /* CONFIG_E1000_NAPI */
4466 netdev->last_rx = jiffies;
4469 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4470 buffer_info->skb = NULL;
4472 /* return some buffers to hardware, one at a time is too slow */
4473 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4474 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4478 /* use prefetched values */
4480 buffer_info = next_buffer;
4482 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4484 rx_ring->next_to_clean = i;
4486 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4488 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4490 adapter->total_rx_packets += total_rx_packets;
4491 adapter->total_rx_bytes += total_rx_bytes;
4496 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4497 * @adapter: address of board private structure
4501 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4502 struct e1000_rx_ring *rx_ring,
4505 struct net_device *netdev = adapter->netdev;
4506 struct pci_dev *pdev = adapter->pdev;
4507 struct e1000_rx_desc *rx_desc;
4508 struct e1000_buffer *buffer_info;
4509 struct sk_buff *skb;
4511 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4513 i = rx_ring->next_to_use;
4514 buffer_info = &rx_ring->buffer_info[i];
4516 while (cleaned_count--) {
4517 skb = buffer_info->skb;
4523 skb = netdev_alloc_skb(netdev, bufsz);
4524 if (unlikely(!skb)) {
4525 /* Better luck next round */
4526 adapter->alloc_rx_buff_failed++;
4530 /* Fix for errata 23, can't cross 64kB boundary */
4531 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4532 struct sk_buff *oldskb = skb;
4533 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4534 "at %p\n", bufsz, skb->data);
4535 /* Try again, without freeing the previous */
4536 skb = netdev_alloc_skb(netdev, bufsz);
4537 /* Failed allocation, critical failure */
4539 dev_kfree_skb(oldskb);
4543 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4546 dev_kfree_skb(oldskb);
4547 break; /* while !buffer_info->skb */
4550 /* Use new allocation */
4551 dev_kfree_skb(oldskb);
4553 /* Make buffer alignment 2 beyond a 16 byte boundary
4554 * this will result in a 16 byte aligned IP header after
4555 * the 14 byte MAC header is removed
4557 skb_reserve(skb, NET_IP_ALIGN);
4559 buffer_info->skb = skb;
4560 buffer_info->length = adapter->rx_buffer_len;
4562 buffer_info->dma = pci_map_single(pdev,
4564 adapter->rx_buffer_len,
4565 PCI_DMA_FROMDEVICE);
4567 /* Fix for errata 23, can't cross 64kB boundary */
4568 if (!e1000_check_64k_bound(adapter,
4569 (void *)(unsigned long)buffer_info->dma,
4570 adapter->rx_buffer_len)) {
4571 DPRINTK(RX_ERR, ERR,
4572 "dma align check failed: %u bytes at %p\n",
4573 adapter->rx_buffer_len,
4574 (void *)(unsigned long)buffer_info->dma);
4576 buffer_info->skb = NULL;
4578 pci_unmap_single(pdev, buffer_info->dma,
4579 adapter->rx_buffer_len,
4580 PCI_DMA_FROMDEVICE);
4582 break; /* while !buffer_info->skb */
4584 rx_desc = E1000_RX_DESC(*rx_ring, i);
4585 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4587 if (unlikely(++i == rx_ring->count))
4589 buffer_info = &rx_ring->buffer_info[i];
4592 if (likely(rx_ring->next_to_use != i)) {
4593 rx_ring->next_to_use = i;
4594 if (unlikely(i-- == 0))
4595 i = (rx_ring->count - 1);
4597 /* Force memory writes to complete before letting h/w
4598 * know there are new descriptors to fetch. (Only
4599 * applicable for weak-ordered memory model archs,
4600 * such as IA-64). */
4602 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4607 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4608 * @adapter: address of board private structure
4612 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4613 struct e1000_rx_ring *rx_ring,
4616 struct net_device *netdev = adapter->netdev;
4617 struct pci_dev *pdev = adapter->pdev;
4618 union e1000_rx_desc_packet_split *rx_desc;
4619 struct e1000_buffer *buffer_info;
4620 struct e1000_ps_page *ps_page;
4621 struct e1000_ps_page_dma *ps_page_dma;
4622 struct sk_buff *skb;
4625 i = rx_ring->next_to_use;
4626 buffer_info = &rx_ring->buffer_info[i];
4627 ps_page = &rx_ring->ps_page[i];
4628 ps_page_dma = &rx_ring->ps_page_dma[i];
4630 while (cleaned_count--) {
4631 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4633 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4634 if (j < adapter->rx_ps_pages) {
4635 if (likely(!ps_page->ps_page[j])) {
4636 ps_page->ps_page[j] =
4637 alloc_page(GFP_ATOMIC);
4638 if (unlikely(!ps_page->ps_page[j])) {
4639 adapter->alloc_rx_buff_failed++;
4642 ps_page_dma->ps_page_dma[j] =
4644 ps_page->ps_page[j],
4646 PCI_DMA_FROMDEVICE);
4648 /* Refresh the desc even if buffer_addrs didn't
4649 * change because each write-back erases
4652 rx_desc->read.buffer_addr[j+1] =
4653 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4655 rx_desc->read.buffer_addr[j+1] = ~0;
4658 skb = netdev_alloc_skb(netdev,
4659 adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4661 if (unlikely(!skb)) {
4662 adapter->alloc_rx_buff_failed++;
4666 /* Make buffer alignment 2 beyond a 16 byte boundary
4667 * this will result in a 16 byte aligned IP header after
4668 * the 14 byte MAC header is removed
4670 skb_reserve(skb, NET_IP_ALIGN);
4672 buffer_info->skb = skb;
4673 buffer_info->length = adapter->rx_ps_bsize0;
4674 buffer_info->dma = pci_map_single(pdev, skb->data,
4675 adapter->rx_ps_bsize0,
4676 PCI_DMA_FROMDEVICE);
4678 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4680 if (unlikely(++i == rx_ring->count)) i = 0;
4681 buffer_info = &rx_ring->buffer_info[i];
4682 ps_page = &rx_ring->ps_page[i];
4683 ps_page_dma = &rx_ring->ps_page_dma[i];
4687 if (likely(rx_ring->next_to_use != i)) {
4688 rx_ring->next_to_use = i;
4689 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4691 /* Force memory writes to complete before letting h/w
4692 * know there are new descriptors to fetch. (Only
4693 * applicable for weak-ordered memory model archs,
4694 * such as IA-64). */
4696 /* Hardware increments by 16 bytes, but packet split
4697 * descriptors are 32 bytes...so we increment tail
4700 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4705 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4710 e1000_smartspeed(struct e1000_adapter *adapter)
4712 uint16_t phy_status;
4715 if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4716 !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4719 if (adapter->smartspeed == 0) {
4720 /* If Master/Slave config fault is asserted twice,
4721 * we assume back-to-back */
4722 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4723 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4724 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4725 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4726 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4727 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4728 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4729 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4731 adapter->smartspeed++;
4732 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4733 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4735 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4736 MII_CR_RESTART_AUTO_NEG);
4737 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4742 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4743 /* If still no link, perhaps using 2/3 pair cable */
4744 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4745 phy_ctrl |= CR_1000T_MS_ENABLE;
4746 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4747 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4748 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4749 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4750 MII_CR_RESTART_AUTO_NEG);
4751 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4754 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4755 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4756 adapter->smartspeed = 0;
4767 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4773 return e1000_mii_ioctl(netdev, ifr, cmd);
4787 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4789 struct e1000_adapter *adapter = netdev_priv(netdev);
4790 struct mii_ioctl_data *data = if_mii(ifr);
4794 unsigned long flags;
4796 if (adapter->hw.media_type != e1000_media_type_copper)
4801 data->phy_id = adapter->hw.phy_addr;
4804 if (!capable(CAP_NET_ADMIN))
4806 spin_lock_irqsave(&adapter->stats_lock, flags);
4807 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4809 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4812 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4815 if (!capable(CAP_NET_ADMIN))
4817 if (data->reg_num & ~(0x1F))
4819 mii_reg = data->val_in;
4820 spin_lock_irqsave(&adapter->stats_lock, flags);
4821 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4823 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4826 if (adapter->hw.media_type == e1000_media_type_copper) {
4827 switch (data->reg_num) {
4829 if (mii_reg & MII_CR_POWER_DOWN)
4831 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4832 adapter->hw.autoneg = 1;
4833 adapter->hw.autoneg_advertised = 0x2F;
4836 spddplx = SPEED_1000;
4837 else if (mii_reg & 0x2000)
4838 spddplx = SPEED_100;
4841 spddplx += (mii_reg & 0x100)
4844 retval = e1000_set_spd_dplx(adapter,
4847 spin_unlock_irqrestore(
4848 &adapter->stats_lock,
4853 if (netif_running(adapter->netdev))
4854 e1000_reinit_locked(adapter);
4856 e1000_reset(adapter);
4858 case M88E1000_PHY_SPEC_CTRL:
4859 case M88E1000_EXT_PHY_SPEC_CTRL:
4860 if (e1000_phy_reset(&adapter->hw)) {
4861 spin_unlock_irqrestore(
4862 &adapter->stats_lock, flags);
4868 switch (data->reg_num) {
4870 if (mii_reg & MII_CR_POWER_DOWN)
4872 if (netif_running(adapter->netdev))
4873 e1000_reinit_locked(adapter);
4875 e1000_reset(adapter);
4879 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4884 return E1000_SUCCESS;
4888 e1000_pci_set_mwi(struct e1000_hw *hw)
4890 struct e1000_adapter *adapter = hw->back;
4891 int ret_val = pci_set_mwi(adapter->pdev);
4894 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4898 e1000_pci_clear_mwi(struct e1000_hw *hw)
4900 struct e1000_adapter *adapter = hw->back;
4902 pci_clear_mwi(adapter->pdev);
4906 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4908 struct e1000_adapter *adapter = hw->back;
4910 pci_read_config_word(adapter->pdev, reg, value);
4914 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4916 struct e1000_adapter *adapter = hw->back;
4918 pci_write_config_word(adapter->pdev, reg, *value);
4922 e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4924 struct e1000_adapter *adapter = hw->back;
4925 uint16_t cap_offset;
4927 cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4929 return -E1000_ERR_CONFIG;
4931 pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4933 return E1000_SUCCESS;
4937 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4943 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4945 struct e1000_adapter *adapter = netdev_priv(netdev);
4946 uint32_t ctrl, rctl;
4948 e1000_irq_disable(adapter);
4949 adapter->vlgrp = grp;
4952 /* enable VLAN tag insert/strip */
4953 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4954 ctrl |= E1000_CTRL_VME;
4955 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4957 if (adapter->hw.mac_type != e1000_ich8lan) {
4958 /* enable VLAN receive filtering */
4959 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4960 rctl |= E1000_RCTL_VFE;
4961 rctl &= ~E1000_RCTL_CFIEN;
4962 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4963 e1000_update_mng_vlan(adapter);
4966 /* disable VLAN tag insert/strip */
4967 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4968 ctrl &= ~E1000_CTRL_VME;
4969 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4971 if (adapter->hw.mac_type != e1000_ich8lan) {
4972 /* disable VLAN filtering */
4973 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4974 rctl &= ~E1000_RCTL_VFE;
4975 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4976 if (adapter->mng_vlan_id !=
4977 (uint16_t)E1000_MNG_VLAN_NONE) {
4978 e1000_vlan_rx_kill_vid(netdev,
4979 adapter->mng_vlan_id);
4980 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4985 e1000_irq_enable(adapter);
4989 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4991 struct e1000_adapter *adapter = netdev_priv(netdev);
4992 uint32_t vfta, index;
4994 if ((adapter->hw.mng_cookie.status &
4995 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4996 (vid == adapter->mng_vlan_id))
4998 /* add VID to filter table */
4999 index = (vid >> 5) & 0x7F;
5000 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5001 vfta |= (1 << (vid & 0x1F));
5002 e1000_write_vfta(&adapter->hw, index, vfta);
5006 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
5008 struct e1000_adapter *adapter = netdev_priv(netdev);
5009 uint32_t vfta, index;
5011 e1000_irq_disable(adapter);
5014 adapter->vlgrp->vlan_devices[vid] = NULL;
5016 e1000_irq_enable(adapter);
5018 if ((adapter->hw.mng_cookie.status &
5019 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
5020 (vid == adapter->mng_vlan_id)) {
5021 /* release control to f/w */
5022 e1000_release_hw_control(adapter);
5026 /* remove VID from filter table */
5027 index = (vid >> 5) & 0x7F;
5028 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5029 vfta &= ~(1 << (vid & 0x1F));
5030 e1000_write_vfta(&adapter->hw, index, vfta);
5034 e1000_restore_vlan(struct e1000_adapter *adapter)
5036 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5038 if (adapter->vlgrp) {
5040 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5041 if (!adapter->vlgrp->vlan_devices[vid])
5043 e1000_vlan_rx_add_vid(adapter->netdev, vid);
5049 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
5051 adapter->hw.autoneg = 0;
5053 /* Fiber NICs only allow 1000 gbps Full duplex */
5054 if ((adapter->hw.media_type == e1000_media_type_fiber) &&
5055 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5056 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5061 case SPEED_10 + DUPLEX_HALF:
5062 adapter->hw.forced_speed_duplex = e1000_10_half;
5064 case SPEED_10 + DUPLEX_FULL:
5065 adapter->hw.forced_speed_duplex = e1000_10_full;
5067 case SPEED_100 + DUPLEX_HALF:
5068 adapter->hw.forced_speed_duplex = e1000_100_half;
5070 case SPEED_100 + DUPLEX_FULL:
5071 adapter->hw.forced_speed_duplex = e1000_100_full;
5073 case SPEED_1000 + DUPLEX_FULL:
5074 adapter->hw.autoneg = 1;
5075 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
5077 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5079 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5086 /* Save/restore 16 or 64 dwords of PCI config space depending on which
5087 * bus we're on (PCI(X) vs. PCI-E)
5089 #define PCIE_CONFIG_SPACE_LEN 256
5090 #define PCI_CONFIG_SPACE_LEN 64
5092 e1000_pci_save_state(struct e1000_adapter *adapter)
5094 struct pci_dev *dev = adapter->pdev;
5098 if (adapter->hw.mac_type >= e1000_82571)
5099 size = PCIE_CONFIG_SPACE_LEN;
5101 size = PCI_CONFIG_SPACE_LEN;
5103 WARN_ON(adapter->config_space != NULL);
5105 adapter->config_space = kmalloc(size, GFP_KERNEL);
5106 if (!adapter->config_space) {
5107 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
5110 for (i = 0; i < (size / 4); i++)
5111 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
5116 e1000_pci_restore_state(struct e1000_adapter *adapter)
5118 struct pci_dev *dev = adapter->pdev;
5122 if (adapter->config_space == NULL)
5125 if (adapter->hw.mac_type >= e1000_82571)
5126 size = PCIE_CONFIG_SPACE_LEN;
5128 size = PCI_CONFIG_SPACE_LEN;
5129 for (i = 0; i < (size / 4); i++)
5130 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
5131 kfree(adapter->config_space);
5132 adapter->config_space = NULL;
5135 #endif /* CONFIG_PM */
5138 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5140 struct net_device *netdev = pci_get_drvdata(pdev);
5141 struct e1000_adapter *adapter = netdev_priv(netdev);
5142 uint32_t ctrl, ctrl_ext, rctl, status;
5143 uint32_t wufc = adapter->wol;
5148 netif_device_detach(netdev);
5150 if (netif_running(netdev)) {
5151 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5152 e1000_down(adapter);
5156 /* Implement our own version of pci_save_state(pdev) because pci-
5157 * express adapters have 256-byte config spaces. */
5158 retval = e1000_pci_save_state(adapter);
5163 status = E1000_READ_REG(&adapter->hw, STATUS);
5164 if (status & E1000_STATUS_LU)
5165 wufc &= ~E1000_WUFC_LNKC;
5168 e1000_setup_rctl(adapter);
5169 e1000_set_multi(netdev);
5171 /* turn on all-multi mode if wake on multicast is enabled */
5172 if (wufc & E1000_WUFC_MC) {
5173 rctl = E1000_READ_REG(&adapter->hw, RCTL);
5174 rctl |= E1000_RCTL_MPE;
5175 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5178 if (adapter->hw.mac_type >= e1000_82540) {
5179 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5180 /* advertise wake from D3Cold */
5181 #define E1000_CTRL_ADVD3WUC 0x00100000
5182 /* phy power management enable */
5183 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5184 ctrl |= E1000_CTRL_ADVD3WUC |
5185 E1000_CTRL_EN_PHY_PWR_MGMT;
5186 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5189 if (adapter->hw.media_type == e1000_media_type_fiber ||
5190 adapter->hw.media_type == e1000_media_type_internal_serdes) {
5191 /* keep the laser running in D3 */
5192 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
5193 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5194 E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
5197 /* Allow time for pending master requests to run */
5198 e1000_disable_pciex_master(&adapter->hw);
5200 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
5201 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
5202 pci_enable_wake(pdev, PCI_D3hot, 1);
5203 pci_enable_wake(pdev, PCI_D3cold, 1);
5205 E1000_WRITE_REG(&adapter->hw, WUC, 0);
5206 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
5207 pci_enable_wake(pdev, PCI_D3hot, 0);
5208 pci_enable_wake(pdev, PCI_D3cold, 0);
5211 e1000_release_manageability(adapter);
5213 /* make sure adapter isn't asleep if manageability is enabled */
5214 if (adapter->en_mng_pt) {
5215 pci_enable_wake(pdev, PCI_D3hot, 1);
5216 pci_enable_wake(pdev, PCI_D3cold, 1);
5219 if (adapter->hw.phy_type == e1000_phy_igp_3)
5220 e1000_phy_powerdown_workaround(&adapter->hw);
5222 if (netif_running(netdev))
5223 e1000_free_irq(adapter);
5225 /* Release control of h/w to f/w. If f/w is AMT enabled, this
5226 * would have already happened in close and is redundant. */
5227 e1000_release_hw_control(adapter);
5229 pci_disable_device(pdev);
5231 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5238 e1000_resume(struct pci_dev *pdev)
5240 struct net_device *netdev = pci_get_drvdata(pdev);
5241 struct e1000_adapter *adapter = netdev_priv(netdev);
5244 pci_set_power_state(pdev, PCI_D0);
5245 e1000_pci_restore_state(adapter);
5246 if ((err = pci_enable_device(pdev))) {
5247 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5250 pci_set_master(pdev);
5252 pci_enable_wake(pdev, PCI_D3hot, 0);
5253 pci_enable_wake(pdev, PCI_D3cold, 0);
5255 if (netif_running(netdev) && (err = e1000_request_irq(adapter)))
5258 e1000_power_up_phy(adapter);
5259 e1000_reset(adapter);
5260 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5262 e1000_init_manageability(adapter);
5264 if (netif_running(netdev))
5267 netif_device_attach(netdev);
5269 /* If the controller is 82573 and f/w is AMT, do not set
5270 * DRV_LOAD until the interface is up. For all other cases,
5271 * let the f/w know that the h/w is now under the control
5273 if (adapter->hw.mac_type != e1000_82573 ||
5274 !e1000_check_mng_mode(&adapter->hw))
5275 e1000_get_hw_control(adapter);
5281 static void e1000_shutdown(struct pci_dev *pdev)
5283 e1000_suspend(pdev, PMSG_SUSPEND);
5286 #ifdef CONFIG_NET_POLL_CONTROLLER
5288 * Polling 'interrupt' - used by things like netconsole to send skbs
5289 * without having to re-enable interrupts. It's not called while
5290 * the interrupt routine is executing.
5293 e1000_netpoll(struct net_device *netdev)
5295 struct e1000_adapter *adapter = netdev_priv(netdev);
5297 disable_irq(adapter->pdev->irq);
5298 e1000_intr(adapter->pdev->irq, netdev);
5299 e1000_clean_tx_irq(adapter, adapter->tx_ring);
5300 #ifndef CONFIG_E1000_NAPI
5301 adapter->clean_rx(adapter, adapter->rx_ring);
5303 enable_irq(adapter->pdev->irq);
5308 * e1000_io_error_detected - called when PCI error is detected
5309 * @pdev: Pointer to PCI device
5310 * @state: The current pci conneection state
5312 * This function is called after a PCI bus error affecting
5313 * this device has been detected.
5315 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
5317 struct net_device *netdev = pci_get_drvdata(pdev);
5318 struct e1000_adapter *adapter = netdev->priv;
5320 netif_device_detach(netdev);
5322 if (netif_running(netdev))
5323 e1000_down(adapter);
5324 pci_disable_device(pdev);
5326 /* Request a slot slot reset. */
5327 return PCI_ERS_RESULT_NEED_RESET;
5331 * e1000_io_slot_reset - called after the pci bus has been reset.
5332 * @pdev: Pointer to PCI device
5334 * Restart the card from scratch, as if from a cold-boot. Implementation
5335 * resembles the first-half of the e1000_resume routine.
5337 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5339 struct net_device *netdev = pci_get_drvdata(pdev);
5340 struct e1000_adapter *adapter = netdev->priv;
5342 if (pci_enable_device(pdev)) {
5343 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5344 return PCI_ERS_RESULT_DISCONNECT;
5346 pci_set_master(pdev);
5348 pci_enable_wake(pdev, PCI_D3hot, 0);
5349 pci_enable_wake(pdev, PCI_D3cold, 0);
5351 e1000_reset(adapter);
5352 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5354 return PCI_ERS_RESULT_RECOVERED;
5358 * e1000_io_resume - called when traffic can start flowing again.
5359 * @pdev: Pointer to PCI device
5361 * This callback is called when the error recovery driver tells us that
5362 * its OK to resume normal operation. Implementation resembles the
5363 * second-half of the e1000_resume routine.
5365 static void e1000_io_resume(struct pci_dev *pdev)
5367 struct net_device *netdev = pci_get_drvdata(pdev);
5368 struct e1000_adapter *adapter = netdev->priv;
5370 e1000_init_manageability(adapter);
5372 if (netif_running(netdev)) {
5373 if (e1000_up(adapter)) {
5374 printk("e1000: can't bring device back up after reset\n");
5379 netif_device_attach(netdev);
5381 /* If the controller is 82573 and f/w is AMT, do not set
5382 * DRV_LOAD until the interface is up. For all other cases,
5383 * let the f/w know that the h/w is now under the control
5385 if (adapter->hw.mac_type != e1000_82573 ||
5386 !e1000_check_mng_mode(&adapter->hw))
5387 e1000_get_hw_control(adapter);