1 /*******************************************************************************
4 Copyright(c) 1999 - 2006 Intel Corporation. All rights reserved.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2 of the License, or (at your option)
11 This program is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 You should have received a copy of the GNU General Public License along with
17 this program; if not, write to the Free Software Foundation, Inc., 59
18 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 The full GNU General Public License is included in this distribution in the
24 Linux NICS <linux.nics@intel.com>
25 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
26 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *******************************************************************************/
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 "7.0.38-k4"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(0x105E),
77 INTEL_E1000_ETHERNET_DEVICE(0x105F),
78 INTEL_E1000_ETHERNET_DEVICE(0x1060),
79 INTEL_E1000_ETHERNET_DEVICE(0x1075),
80 INTEL_E1000_ETHERNET_DEVICE(0x1076),
81 INTEL_E1000_ETHERNET_DEVICE(0x1077),
82 INTEL_E1000_ETHERNET_DEVICE(0x1078),
83 INTEL_E1000_ETHERNET_DEVICE(0x1079),
84 INTEL_E1000_ETHERNET_DEVICE(0x107A),
85 INTEL_E1000_ETHERNET_DEVICE(0x107B),
86 INTEL_E1000_ETHERNET_DEVICE(0x107C),
87 INTEL_E1000_ETHERNET_DEVICE(0x107D),
88 INTEL_E1000_ETHERNET_DEVICE(0x107E),
89 INTEL_E1000_ETHERNET_DEVICE(0x107F),
90 INTEL_E1000_ETHERNET_DEVICE(0x108A),
91 INTEL_E1000_ETHERNET_DEVICE(0x108B),
92 INTEL_E1000_ETHERNET_DEVICE(0x108C),
93 INTEL_E1000_ETHERNET_DEVICE(0x1096),
94 INTEL_E1000_ETHERNET_DEVICE(0x1098),
95 INTEL_E1000_ETHERNET_DEVICE(0x1099),
96 INTEL_E1000_ETHERNET_DEVICE(0x109A),
97 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
98 INTEL_E1000_ETHERNET_DEVICE(0x10B9),
99 /* required last entry */
103 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
105 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
106 struct e1000_tx_ring *txdr);
107 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
108 struct e1000_rx_ring *rxdr);
109 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
110 struct e1000_tx_ring *tx_ring);
111 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
112 struct e1000_rx_ring *rx_ring);
114 /* Local Function Prototypes */
116 static int e1000_init_module(void);
117 static void e1000_exit_module(void);
118 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
119 static void __devexit e1000_remove(struct pci_dev *pdev);
120 static int e1000_alloc_queues(struct e1000_adapter *adapter);
121 static int e1000_sw_init(struct e1000_adapter *adapter);
122 static int e1000_open(struct net_device *netdev);
123 static int e1000_close(struct net_device *netdev);
124 static void e1000_configure_tx(struct e1000_adapter *adapter);
125 static void e1000_configure_rx(struct e1000_adapter *adapter);
126 static void e1000_setup_rctl(struct e1000_adapter *adapter);
127 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
128 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
129 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
130 struct e1000_tx_ring *tx_ring);
131 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
132 struct e1000_rx_ring *rx_ring);
133 static void e1000_set_multi(struct net_device *netdev);
134 static void e1000_update_phy_info(unsigned long data);
135 static void e1000_watchdog(unsigned long data);
136 static void e1000_82547_tx_fifo_stall(unsigned long data);
137 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
138 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
139 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
140 static int e1000_set_mac(struct net_device *netdev, void *p);
141 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
142 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
143 struct e1000_tx_ring *tx_ring);
144 #ifdef CONFIG_E1000_NAPI
145 static int e1000_clean(struct net_device *poll_dev, int *budget);
146 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
147 struct e1000_rx_ring *rx_ring,
148 int *work_done, int work_to_do);
149 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
150 struct e1000_rx_ring *rx_ring,
151 int *work_done, int work_to_do);
153 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
154 struct e1000_rx_ring *rx_ring);
155 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
156 struct e1000_rx_ring *rx_ring);
158 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
159 struct e1000_rx_ring *rx_ring,
161 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
162 struct e1000_rx_ring *rx_ring,
164 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
165 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
167 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
168 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
169 static void e1000_tx_timeout(struct net_device *dev);
170 static void e1000_reset_task(struct net_device *dev);
171 static void e1000_smartspeed(struct e1000_adapter *adapter);
172 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
173 struct sk_buff *skb);
175 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
176 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
177 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
178 static void e1000_restore_vlan(struct e1000_adapter *adapter);
180 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
182 static int e1000_resume(struct pci_dev *pdev);
184 static void e1000_shutdown(struct pci_dev *pdev);
186 #ifdef CONFIG_NET_POLL_CONTROLLER
187 /* for netdump / net console */
188 static void e1000_netpoll (struct net_device *netdev);
191 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
192 pci_channel_state_t state);
193 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
194 static void e1000_io_resume(struct pci_dev *pdev);
196 static struct pci_error_handlers e1000_err_handler = {
197 .error_detected = e1000_io_error_detected,
198 .slot_reset = e1000_io_slot_reset,
199 .resume = e1000_io_resume,
202 static struct pci_driver e1000_driver = {
203 .name = e1000_driver_name,
204 .id_table = e1000_pci_tbl,
205 .probe = e1000_probe,
206 .remove = __devexit_p(e1000_remove),
207 /* Power Managment Hooks */
208 .suspend = e1000_suspend,
210 .resume = e1000_resume,
212 .shutdown = e1000_shutdown,
213 .err_handler = &e1000_err_handler
216 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
217 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
218 MODULE_LICENSE("GPL");
219 MODULE_VERSION(DRV_VERSION);
221 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
222 module_param(debug, int, 0);
223 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
226 * e1000_init_module - Driver Registration Routine
228 * e1000_init_module is the first routine called when the driver is
229 * loaded. All it does is register with the PCI subsystem.
233 e1000_init_module(void)
236 printk(KERN_INFO "%s - version %s\n",
237 e1000_driver_string, e1000_driver_version);
239 printk(KERN_INFO "%s\n", e1000_copyright);
241 ret = pci_module_init(&e1000_driver);
246 module_init(e1000_init_module);
249 * e1000_exit_module - Driver Exit Cleanup Routine
251 * e1000_exit_module is called just before the driver is removed
256 e1000_exit_module(void)
258 pci_unregister_driver(&e1000_driver);
261 module_exit(e1000_exit_module);
263 static int e1000_request_irq(struct e1000_adapter *adapter)
265 struct net_device *netdev = adapter->netdev;
268 flags = SA_SHIRQ | SA_SAMPLE_RANDOM;
269 #ifdef CONFIG_PCI_MSI
270 if (adapter->hw.mac_type > e1000_82547_rev_2) {
271 adapter->have_msi = TRUE;
272 if ((err = pci_enable_msi(adapter->pdev))) {
274 "Unable to allocate MSI interrupt Error: %d\n", err);
275 adapter->have_msi = FALSE;
278 if (adapter->have_msi)
281 if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
282 netdev->name, netdev)))
284 "Unable to allocate interrupt Error: %d\n", err);
289 static void e1000_free_irq(struct e1000_adapter *adapter)
291 struct net_device *netdev = adapter->netdev;
293 free_irq(adapter->pdev->irq, netdev);
295 #ifdef CONFIG_PCI_MSI
296 if (adapter->have_msi)
297 pci_disable_msi(adapter->pdev);
302 * e1000_irq_disable - Mask off interrupt generation on the NIC
303 * @adapter: board private structure
307 e1000_irq_disable(struct e1000_adapter *adapter)
309 atomic_inc(&adapter->irq_sem);
310 E1000_WRITE_REG(&adapter->hw, IMC, ~0);
311 E1000_WRITE_FLUSH(&adapter->hw);
312 synchronize_irq(adapter->pdev->irq);
316 * e1000_irq_enable - Enable default interrupt generation settings
317 * @adapter: board private structure
321 e1000_irq_enable(struct e1000_adapter *adapter)
323 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
324 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
325 E1000_WRITE_FLUSH(&adapter->hw);
330 e1000_update_mng_vlan(struct e1000_adapter *adapter)
332 struct net_device *netdev = adapter->netdev;
333 uint16_t vid = adapter->hw.mng_cookie.vlan_id;
334 uint16_t old_vid = adapter->mng_vlan_id;
335 if (adapter->vlgrp) {
336 if (!adapter->vlgrp->vlan_devices[vid]) {
337 if (adapter->hw.mng_cookie.status &
338 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
339 e1000_vlan_rx_add_vid(netdev, vid);
340 adapter->mng_vlan_id = vid;
342 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
344 if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
346 !adapter->vlgrp->vlan_devices[old_vid])
347 e1000_vlan_rx_kill_vid(netdev, old_vid);
349 adapter->mng_vlan_id = vid;
354 * e1000_release_hw_control - release control of the h/w to f/w
355 * @adapter: address of board private structure
357 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
358 * For ASF and Pass Through versions of f/w this means that the
359 * driver is no longer loaded. For AMT version (only with 82573) i
360 * of the f/w this means that the netowrk i/f is closed.
365 e1000_release_hw_control(struct e1000_adapter *adapter)
370 /* Let firmware taken over control of h/w */
371 switch (adapter->hw.mac_type) {
374 case e1000_80003es2lan:
375 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
376 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
377 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
380 swsm = E1000_READ_REG(&adapter->hw, SWSM);
381 E1000_WRITE_REG(&adapter->hw, SWSM,
382 swsm & ~E1000_SWSM_DRV_LOAD);
389 * e1000_get_hw_control - get control of the h/w from f/w
390 * @adapter: address of board private structure
392 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
393 * For ASF and Pass Through versions of f/w this means that
394 * the driver is loaded. For AMT version (only with 82573)
395 * of the f/w this means that the netowrk i/f is open.
400 e1000_get_hw_control(struct e1000_adapter *adapter)
404 /* Let firmware know the driver has taken over */
405 switch (adapter->hw.mac_type) {
408 case e1000_80003es2lan:
409 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
410 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
411 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
414 swsm = E1000_READ_REG(&adapter->hw, SWSM);
415 E1000_WRITE_REG(&adapter->hw, SWSM,
416 swsm | E1000_SWSM_DRV_LOAD);
424 e1000_up(struct e1000_adapter *adapter)
426 struct net_device *netdev = adapter->netdev;
429 /* hardware has been reset, we need to reload some things */
431 e1000_set_multi(netdev);
433 e1000_restore_vlan(adapter);
435 e1000_configure_tx(adapter);
436 e1000_setup_rctl(adapter);
437 e1000_configure_rx(adapter);
438 /* call E1000_DESC_UNUSED which always leaves
439 * at least 1 descriptor unused to make sure
440 * next_to_use != next_to_clean */
441 for (i = 0; i < adapter->num_rx_queues; i++) {
442 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
443 adapter->alloc_rx_buf(adapter, ring,
444 E1000_DESC_UNUSED(ring));
447 adapter->tx_queue_len = netdev->tx_queue_len;
449 mod_timer(&adapter->watchdog_timer, jiffies);
451 #ifdef CONFIG_E1000_NAPI
452 netif_poll_enable(netdev);
454 e1000_irq_enable(adapter);
460 * e1000_power_up_phy - restore link in case the phy was powered down
461 * @adapter: address of board private structure
463 * The phy may be powered down to save power and turn off link when the
464 * driver is unloaded and wake on lan is not enabled (among others)
465 * *** this routine MUST be followed by a call to e1000_reset ***
469 static void e1000_power_up_phy(struct e1000_adapter *adapter)
471 uint16_t mii_reg = 0;
473 /* Just clear the power down bit to wake the phy back up */
474 if (adapter->hw.media_type == e1000_media_type_copper) {
475 /* according to the manual, the phy will retain its
476 * settings across a power-down/up cycle */
477 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
478 mii_reg &= ~MII_CR_POWER_DOWN;
479 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
483 static void e1000_power_down_phy(struct e1000_adapter *adapter)
485 boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
486 e1000_check_mng_mode(&adapter->hw);
487 /* Power down the PHY so no link is implied when interface is down
488 * The PHY cannot be powered down if any of the following is TRUE
491 * (c) SoL/IDER session is active */
492 if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
493 adapter->hw.media_type == e1000_media_type_copper &&
494 !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
496 !e1000_check_phy_reset_block(&adapter->hw)) {
497 uint16_t mii_reg = 0;
498 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
499 mii_reg |= MII_CR_POWER_DOWN;
500 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
506 e1000_down(struct e1000_adapter *adapter)
508 struct net_device *netdev = adapter->netdev;
510 e1000_irq_disable(adapter);
512 del_timer_sync(&adapter->tx_fifo_stall_timer);
513 del_timer_sync(&adapter->watchdog_timer);
514 del_timer_sync(&adapter->phy_info_timer);
516 #ifdef CONFIG_E1000_NAPI
517 netif_poll_disable(netdev);
519 netdev->tx_queue_len = adapter->tx_queue_len;
520 adapter->link_speed = 0;
521 adapter->link_duplex = 0;
522 netif_carrier_off(netdev);
523 netif_stop_queue(netdev);
525 e1000_reset(adapter);
526 e1000_clean_all_tx_rings(adapter);
527 e1000_clean_all_rx_rings(adapter);
531 e1000_reinit_locked(struct e1000_adapter *adapter)
533 WARN_ON(in_interrupt());
534 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
538 clear_bit(__E1000_RESETTING, &adapter->flags);
542 e1000_reset(struct e1000_adapter *adapter)
545 uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
547 /* Repartition Pba for greater than 9k mtu
548 * To take effect CTRL.RST is required.
551 switch (adapter->hw.mac_type) {
553 case e1000_82547_rev_2:
558 case e1000_80003es2lan:
569 if ((adapter->hw.mac_type != e1000_82573) &&
570 (adapter->netdev->mtu > E1000_RXBUFFER_8192))
571 pba -= 8; /* allocate more FIFO for Tx */
574 if (adapter->hw.mac_type == e1000_82547) {
575 adapter->tx_fifo_head = 0;
576 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
577 adapter->tx_fifo_size =
578 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
579 atomic_set(&adapter->tx_fifo_stall, 0);
582 E1000_WRITE_REG(&adapter->hw, PBA, pba);
584 /* flow control settings */
585 /* Set the FC high water mark to 90% of the FIFO size.
586 * Required to clear last 3 LSB */
587 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
589 adapter->hw.fc_high_water = fc_high_water_mark;
590 adapter->hw.fc_low_water = fc_high_water_mark - 8;
591 if (adapter->hw.mac_type == e1000_80003es2lan)
592 adapter->hw.fc_pause_time = 0xFFFF;
594 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
595 adapter->hw.fc_send_xon = 1;
596 adapter->hw.fc = adapter->hw.original_fc;
598 /* Allow time for pending master requests to run */
599 e1000_reset_hw(&adapter->hw);
600 if (adapter->hw.mac_type >= e1000_82544)
601 E1000_WRITE_REG(&adapter->hw, WUC, 0);
602 if (e1000_init_hw(&adapter->hw))
603 DPRINTK(PROBE, ERR, "Hardware Error\n");
604 e1000_update_mng_vlan(adapter);
605 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
606 E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
608 e1000_reset_adaptive(&adapter->hw);
609 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
610 if (adapter->en_mng_pt) {
611 manc = E1000_READ_REG(&adapter->hw, MANC);
612 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
613 E1000_WRITE_REG(&adapter->hw, MANC, manc);
618 * e1000_probe - Device Initialization Routine
619 * @pdev: PCI device information struct
620 * @ent: entry in e1000_pci_tbl
622 * Returns 0 on success, negative on failure
624 * e1000_probe initializes an adapter identified by a pci_dev structure.
625 * The OS initialization, configuring of the adapter private structure,
626 * and a hardware reset occur.
630 e1000_probe(struct pci_dev *pdev,
631 const struct pci_device_id *ent)
633 struct net_device *netdev;
634 struct e1000_adapter *adapter;
635 unsigned long mmio_start, mmio_len;
637 static int cards_found = 0;
638 static int e1000_ksp3_port_a = 0; /* global ksp3 port a indication */
639 int i, err, pci_using_dac;
640 uint16_t eeprom_data;
641 uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
642 if ((err = pci_enable_device(pdev)))
645 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
648 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
649 E1000_ERR("No usable DMA configuration, aborting\n");
655 if ((err = pci_request_regions(pdev, e1000_driver_name)))
658 pci_set_master(pdev);
660 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
663 goto err_alloc_etherdev;
666 SET_MODULE_OWNER(netdev);
667 SET_NETDEV_DEV(netdev, &pdev->dev);
669 pci_set_drvdata(pdev, netdev);
670 adapter = netdev_priv(netdev);
671 adapter->netdev = netdev;
672 adapter->pdev = pdev;
673 adapter->hw.back = adapter;
674 adapter->msg_enable = (1 << debug) - 1;
676 mmio_start = pci_resource_start(pdev, BAR_0);
677 mmio_len = pci_resource_len(pdev, BAR_0);
679 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
680 if (!adapter->hw.hw_addr) {
685 for (i = BAR_1; i <= BAR_5; i++) {
686 if (pci_resource_len(pdev, i) == 0)
688 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
689 adapter->hw.io_base = pci_resource_start(pdev, i);
694 netdev->open = &e1000_open;
695 netdev->stop = &e1000_close;
696 netdev->hard_start_xmit = &e1000_xmit_frame;
697 netdev->get_stats = &e1000_get_stats;
698 netdev->set_multicast_list = &e1000_set_multi;
699 netdev->set_mac_address = &e1000_set_mac;
700 netdev->change_mtu = &e1000_change_mtu;
701 netdev->do_ioctl = &e1000_ioctl;
702 e1000_set_ethtool_ops(netdev);
703 netdev->tx_timeout = &e1000_tx_timeout;
704 netdev->watchdog_timeo = 5 * HZ;
705 #ifdef CONFIG_E1000_NAPI
706 netdev->poll = &e1000_clean;
709 netdev->vlan_rx_register = e1000_vlan_rx_register;
710 netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
711 netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
712 #ifdef CONFIG_NET_POLL_CONTROLLER
713 netdev->poll_controller = e1000_netpoll;
715 strcpy(netdev->name, pci_name(pdev));
717 netdev->mem_start = mmio_start;
718 netdev->mem_end = mmio_start + mmio_len;
719 netdev->base_addr = adapter->hw.io_base;
721 adapter->bd_number = cards_found;
723 /* setup the private structure */
725 if ((err = e1000_sw_init(adapter)))
728 if ((err = e1000_check_phy_reset_block(&adapter->hw)))
729 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
731 /* if ksp3, indicate if it's port a being setup */
732 if (pdev->device == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3 &&
733 e1000_ksp3_port_a == 0)
734 adapter->ksp3_port_a = 1;
736 /* Reset for multiple KP3 adapters */
737 if (e1000_ksp3_port_a == 4)
738 e1000_ksp3_port_a = 0;
740 if (adapter->hw.mac_type >= e1000_82543) {
741 netdev->features = NETIF_F_SG |
745 NETIF_F_HW_VLAN_FILTER;
749 if ((adapter->hw.mac_type >= e1000_82544) &&
750 (adapter->hw.mac_type != e1000_82547))
751 netdev->features |= NETIF_F_TSO;
753 #ifdef NETIF_F_TSO_IPV6
754 if (adapter->hw.mac_type > e1000_82547_rev_2)
755 netdev->features |= NETIF_F_TSO_IPV6;
759 netdev->features |= NETIF_F_HIGHDMA;
761 /* hard_start_xmit is safe against parallel locking */
762 netdev->features |= NETIF_F_LLTX;
764 adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
766 /* before reading the EEPROM, reset the controller to
767 * put the device in a known good starting state */
769 e1000_reset_hw(&adapter->hw);
771 /* make sure the EEPROM is good */
773 if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
774 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
779 /* copy the MAC address out of the EEPROM */
781 if (e1000_read_mac_addr(&adapter->hw))
782 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
783 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
784 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
786 if (!is_valid_ether_addr(netdev->perm_addr)) {
787 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
792 e1000_read_part_num(&adapter->hw, &(adapter->part_num));
794 e1000_get_bus_info(&adapter->hw);
796 init_timer(&adapter->tx_fifo_stall_timer);
797 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
798 adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
800 init_timer(&adapter->watchdog_timer);
801 adapter->watchdog_timer.function = &e1000_watchdog;
802 adapter->watchdog_timer.data = (unsigned long) adapter;
804 init_timer(&adapter->phy_info_timer);
805 adapter->phy_info_timer.function = &e1000_update_phy_info;
806 adapter->phy_info_timer.data = (unsigned long) adapter;
808 INIT_WORK(&adapter->reset_task,
809 (void (*)(void *))e1000_reset_task, netdev);
811 /* we're going to reset, so assume we have no link for now */
813 netif_carrier_off(netdev);
814 netif_stop_queue(netdev);
816 e1000_check_options(adapter);
818 /* Initial Wake on LAN setting
819 * If APM wake is enabled in the EEPROM,
820 * enable the ACPI Magic Packet filter
823 switch (adapter->hw.mac_type) {
824 case e1000_82542_rev2_0:
825 case e1000_82542_rev2_1:
829 e1000_read_eeprom(&adapter->hw,
830 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
831 eeprom_apme_mask = E1000_EEPROM_82544_APM;
834 case e1000_82546_rev_3:
836 case e1000_80003es2lan:
837 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
838 e1000_read_eeprom(&adapter->hw,
839 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
844 e1000_read_eeprom(&adapter->hw,
845 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
848 if (eeprom_data & eeprom_apme_mask)
849 adapter->wol |= E1000_WUFC_MAG;
851 /* print bus type/speed/width info */
853 struct e1000_hw *hw = &adapter->hw;
854 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
855 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
856 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
857 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
858 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
859 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
860 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
861 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
862 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
863 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
864 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
868 for (i = 0; i < 6; i++)
869 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
871 /* reset the hardware with the new settings */
872 e1000_reset(adapter);
874 /* If the controller is 82573 and f/w is AMT, do not set
875 * DRV_LOAD until the interface is up. For all other cases,
876 * let the f/w know that the h/w is now under the control
878 if (adapter->hw.mac_type != e1000_82573 ||
879 !e1000_check_mng_mode(&adapter->hw))
880 e1000_get_hw_control(adapter);
882 strcpy(netdev->name, "eth%d");
883 if ((err = register_netdev(netdev)))
886 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
894 iounmap(adapter->hw.hw_addr);
898 pci_release_regions(pdev);
903 * e1000_remove - Device Removal Routine
904 * @pdev: PCI device information struct
906 * e1000_remove is called by the PCI subsystem to alert the driver
907 * that it should release a PCI device. The could be caused by a
908 * Hot-Plug event, or because the driver is going to be removed from
912 static void __devexit
913 e1000_remove(struct pci_dev *pdev)
915 struct net_device *netdev = pci_get_drvdata(pdev);
916 struct e1000_adapter *adapter = netdev_priv(netdev);
918 #ifdef CONFIG_E1000_NAPI
922 flush_scheduled_work();
924 if (adapter->hw.mac_type >= e1000_82540 &&
925 adapter->hw.media_type == e1000_media_type_copper) {
926 manc = E1000_READ_REG(&adapter->hw, MANC);
927 if (manc & E1000_MANC_SMBUS_EN) {
928 manc |= E1000_MANC_ARP_EN;
929 E1000_WRITE_REG(&adapter->hw, MANC, manc);
933 /* Release control of h/w to f/w. If f/w is AMT enabled, this
934 * would have already happened in close and is redundant. */
935 e1000_release_hw_control(adapter);
937 unregister_netdev(netdev);
938 #ifdef CONFIG_E1000_NAPI
939 for (i = 0; i < adapter->num_rx_queues; i++)
940 dev_put(&adapter->polling_netdev[i]);
943 if (!e1000_check_phy_reset_block(&adapter->hw))
944 e1000_phy_hw_reset(&adapter->hw);
946 kfree(adapter->tx_ring);
947 kfree(adapter->rx_ring);
948 #ifdef CONFIG_E1000_NAPI
949 kfree(adapter->polling_netdev);
952 iounmap(adapter->hw.hw_addr);
953 pci_release_regions(pdev);
957 pci_disable_device(pdev);
961 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
962 * @adapter: board private structure to initialize
964 * e1000_sw_init initializes the Adapter private data structure.
965 * Fields are initialized based on PCI device information and
966 * OS network device settings (MTU size).
970 e1000_sw_init(struct e1000_adapter *adapter)
972 struct e1000_hw *hw = &adapter->hw;
973 struct net_device *netdev = adapter->netdev;
974 struct pci_dev *pdev = adapter->pdev;
975 #ifdef CONFIG_E1000_NAPI
979 /* PCI config space info */
981 hw->vendor_id = pdev->vendor;
982 hw->device_id = pdev->device;
983 hw->subsystem_vendor_id = pdev->subsystem_vendor;
984 hw->subsystem_id = pdev->subsystem_device;
986 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
988 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
990 adapter->rx_buffer_len = MAXIMUM_ETHERNET_FRAME_SIZE;
991 adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
992 hw->max_frame_size = netdev->mtu +
993 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
994 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
996 /* identify the MAC */
998 if (e1000_set_mac_type(hw)) {
999 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1003 /* initialize eeprom parameters */
1005 if (e1000_init_eeprom_params(hw)) {
1006 E1000_ERR("EEPROM initialization failed\n");
1010 switch (hw->mac_type) {
1015 case e1000_82541_rev_2:
1016 case e1000_82547_rev_2:
1017 hw->phy_init_script = 1;
1021 e1000_set_media_type(hw);
1023 hw->wait_autoneg_complete = FALSE;
1024 hw->tbi_compatibility_en = TRUE;
1025 hw->adaptive_ifs = TRUE;
1027 /* Copper options */
1029 if (hw->media_type == e1000_media_type_copper) {
1030 hw->mdix = AUTO_ALL_MODES;
1031 hw->disable_polarity_correction = FALSE;
1032 hw->master_slave = E1000_MASTER_SLAVE;
1035 adapter->num_tx_queues = 1;
1036 adapter->num_rx_queues = 1;
1038 if (e1000_alloc_queues(adapter)) {
1039 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1043 #ifdef CONFIG_E1000_NAPI
1044 for (i = 0; i < adapter->num_rx_queues; i++) {
1045 adapter->polling_netdev[i].priv = adapter;
1046 adapter->polling_netdev[i].poll = &e1000_clean;
1047 adapter->polling_netdev[i].weight = 64;
1048 dev_hold(&adapter->polling_netdev[i]);
1049 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1051 spin_lock_init(&adapter->tx_queue_lock);
1054 atomic_set(&adapter->irq_sem, 1);
1055 spin_lock_init(&adapter->stats_lock);
1061 * e1000_alloc_queues - Allocate memory for all rings
1062 * @adapter: board private structure to initialize
1064 * We allocate one ring per queue at run-time since we don't know the
1065 * number of queues at compile-time. The polling_netdev array is
1066 * intended for Multiqueue, but should work fine with a single queue.
1069 static int __devinit
1070 e1000_alloc_queues(struct e1000_adapter *adapter)
1074 size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1075 adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1076 if (!adapter->tx_ring)
1078 memset(adapter->tx_ring, 0, size);
1080 size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1081 adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1082 if (!adapter->rx_ring) {
1083 kfree(adapter->tx_ring);
1086 memset(adapter->rx_ring, 0, size);
1088 #ifdef CONFIG_E1000_NAPI
1089 size = sizeof(struct net_device) * adapter->num_rx_queues;
1090 adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1091 if (!adapter->polling_netdev) {
1092 kfree(adapter->tx_ring);
1093 kfree(adapter->rx_ring);
1096 memset(adapter->polling_netdev, 0, size);
1099 return E1000_SUCCESS;
1103 * e1000_open - Called when a network interface is made active
1104 * @netdev: network interface device structure
1106 * Returns 0 on success, negative value on failure
1108 * The open entry point is called when a network interface is made
1109 * active by the system (IFF_UP). At this point all resources needed
1110 * for transmit and receive operations are allocated, the interrupt
1111 * handler is registered with the OS, the watchdog timer is started,
1112 * and the stack is notified that the interface is ready.
1116 e1000_open(struct net_device *netdev)
1118 struct e1000_adapter *adapter = netdev_priv(netdev);
1121 /* disallow open during test */
1122 if (test_bit(__E1000_DRIVER_TESTING, &adapter->flags))
1125 /* allocate transmit descriptors */
1127 if ((err = e1000_setup_all_tx_resources(adapter)))
1130 /* allocate receive descriptors */
1132 if ((err = e1000_setup_all_rx_resources(adapter)))
1135 err = e1000_request_irq(adapter);
1139 e1000_power_up_phy(adapter);
1141 if ((err = e1000_up(adapter)))
1143 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1144 if ((adapter->hw.mng_cookie.status &
1145 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1146 e1000_update_mng_vlan(adapter);
1149 /* If AMT is enabled, let the firmware know that the network
1150 * interface is now open */
1151 if (adapter->hw.mac_type == e1000_82573 &&
1152 e1000_check_mng_mode(&adapter->hw))
1153 e1000_get_hw_control(adapter);
1155 return E1000_SUCCESS;
1158 e1000_free_all_rx_resources(adapter);
1160 e1000_free_all_tx_resources(adapter);
1162 e1000_reset(adapter);
1168 * e1000_close - Disables a network interface
1169 * @netdev: network interface device structure
1171 * Returns 0, this is not allowed to fail
1173 * The close entry point is called when an interface is de-activated
1174 * by the OS. The hardware is still under the drivers control, but
1175 * needs to be disabled. A global MAC reset is issued to stop the
1176 * hardware, and all transmit and receive resources are freed.
1180 e1000_close(struct net_device *netdev)
1182 struct e1000_adapter *adapter = netdev_priv(netdev);
1184 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1185 e1000_down(adapter);
1186 e1000_power_down_phy(adapter);
1187 e1000_free_irq(adapter);
1189 e1000_free_all_tx_resources(adapter);
1190 e1000_free_all_rx_resources(adapter);
1192 if ((adapter->hw.mng_cookie.status &
1193 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1194 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1197 /* If AMT is enabled, let the firmware know that the network
1198 * interface is now closed */
1199 if (adapter->hw.mac_type == e1000_82573 &&
1200 e1000_check_mng_mode(&adapter->hw))
1201 e1000_release_hw_control(adapter);
1207 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1208 * @adapter: address of board private structure
1209 * @start: address of beginning of memory
1210 * @len: length of memory
1213 e1000_check_64k_bound(struct e1000_adapter *adapter,
1214 void *start, unsigned long len)
1216 unsigned long begin = (unsigned long) start;
1217 unsigned long end = begin + len;
1219 /* First rev 82545 and 82546 need to not allow any memory
1220 * write location to cross 64k boundary due to errata 23 */
1221 if (adapter->hw.mac_type == e1000_82545 ||
1222 adapter->hw.mac_type == e1000_82546) {
1223 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1230 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1231 * @adapter: board private structure
1232 * @txdr: tx descriptor ring (for a specific queue) to setup
1234 * Return 0 on success, negative on failure
1238 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1239 struct e1000_tx_ring *txdr)
1241 struct pci_dev *pdev = adapter->pdev;
1244 size = sizeof(struct e1000_buffer) * txdr->count;
1246 txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1247 if (!txdr->buffer_info) {
1249 "Unable to allocate memory for the transmit descriptor ring\n");
1252 memset(txdr->buffer_info, 0, size);
1254 /* round up to nearest 4K */
1256 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1257 E1000_ROUNDUP(txdr->size, 4096);
1259 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1262 vfree(txdr->buffer_info);
1264 "Unable to allocate memory for the transmit descriptor ring\n");
1268 /* Fix for errata 23, can't cross 64kB boundary */
1269 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1270 void *olddesc = txdr->desc;
1271 dma_addr_t olddma = txdr->dma;
1272 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1273 "at %p\n", txdr->size, txdr->desc);
1274 /* Try again, without freeing the previous */
1275 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1276 /* Failed allocation, critical failure */
1278 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1279 goto setup_tx_desc_die;
1282 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1284 pci_free_consistent(pdev, txdr->size, txdr->desc,
1286 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1288 "Unable to allocate aligned memory "
1289 "for the transmit descriptor ring\n");
1290 vfree(txdr->buffer_info);
1293 /* Free old allocation, new allocation was successful */
1294 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1297 memset(txdr->desc, 0, txdr->size);
1299 txdr->next_to_use = 0;
1300 txdr->next_to_clean = 0;
1301 spin_lock_init(&txdr->tx_lock);
1307 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1308 * (Descriptors) for all queues
1309 * @adapter: board private structure
1311 * If this function returns with an error, then it's possible one or
1312 * more of the rings is populated (while the rest are not). It is the
1313 * callers duty to clean those orphaned rings.
1315 * Return 0 on success, negative on failure
1319 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1323 for (i = 0; i < adapter->num_tx_queues; i++) {
1324 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1327 "Allocation for Tx Queue %u failed\n", i);
1336 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1337 * @adapter: board private structure
1339 * Configure the Tx unit of the MAC after a reset.
1343 e1000_configure_tx(struct e1000_adapter *adapter)
1346 struct e1000_hw *hw = &adapter->hw;
1347 uint32_t tdlen, tctl, tipg, tarc;
1348 uint32_t ipgr1, ipgr2;
1350 /* Setup the HW Tx Head and Tail descriptor pointers */
1352 switch (adapter->num_tx_queues) {
1355 tdba = adapter->tx_ring[0].dma;
1356 tdlen = adapter->tx_ring[0].count *
1357 sizeof(struct e1000_tx_desc);
1358 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1359 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1360 E1000_WRITE_REG(hw, TDLEN, tdlen);
1361 E1000_WRITE_REG(hw, TDH, 0);
1362 E1000_WRITE_REG(hw, TDT, 0);
1363 adapter->tx_ring[0].tdh = E1000_TDH;
1364 adapter->tx_ring[0].tdt = E1000_TDT;
1368 /* Set the default values for the Tx Inter Packet Gap timer */
1370 if (hw->media_type == e1000_media_type_fiber ||
1371 hw->media_type == e1000_media_type_internal_serdes)
1372 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1374 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1376 switch (hw->mac_type) {
1377 case e1000_82542_rev2_0:
1378 case e1000_82542_rev2_1:
1379 tipg = DEFAULT_82542_TIPG_IPGT;
1380 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1381 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1383 case e1000_80003es2lan:
1384 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1385 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1388 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1389 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1392 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1393 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1394 E1000_WRITE_REG(hw, TIPG, tipg);
1396 /* Set the Tx Interrupt Delay register */
1398 E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1399 if (hw->mac_type >= e1000_82540)
1400 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1402 /* Program the Transmit Control Register */
1404 tctl = E1000_READ_REG(hw, TCTL);
1406 tctl &= ~E1000_TCTL_CT;
1407 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1408 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1411 /* disable Multiple Reads for debugging */
1412 tctl &= ~E1000_TCTL_MULR;
1415 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1416 tarc = E1000_READ_REG(hw, TARC0);
1417 tarc |= ((1 << 25) | (1 << 21));
1418 E1000_WRITE_REG(hw, TARC0, tarc);
1419 tarc = E1000_READ_REG(hw, TARC1);
1421 if (tctl & E1000_TCTL_MULR)
1425 E1000_WRITE_REG(hw, TARC1, tarc);
1426 } else if (hw->mac_type == e1000_80003es2lan) {
1427 tarc = E1000_READ_REG(hw, TARC0);
1429 if (hw->media_type == e1000_media_type_internal_serdes)
1431 E1000_WRITE_REG(hw, TARC0, tarc);
1432 tarc = E1000_READ_REG(hw, TARC1);
1434 E1000_WRITE_REG(hw, TARC1, tarc);
1437 e1000_config_collision_dist(hw);
1439 /* Setup Transmit Descriptor Settings for eop descriptor */
1440 adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1443 if (hw->mac_type < e1000_82543)
1444 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1446 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1448 /* Cache if we're 82544 running in PCI-X because we'll
1449 * need this to apply a workaround later in the send path. */
1450 if (hw->mac_type == e1000_82544 &&
1451 hw->bus_type == e1000_bus_type_pcix)
1452 adapter->pcix_82544 = 1;
1454 E1000_WRITE_REG(hw, TCTL, tctl);
1459 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1460 * @adapter: board private structure
1461 * @rxdr: rx descriptor ring (for a specific queue) to setup
1463 * Returns 0 on success, negative on failure
1467 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1468 struct e1000_rx_ring *rxdr)
1470 struct pci_dev *pdev = adapter->pdev;
1473 size = sizeof(struct e1000_buffer) * rxdr->count;
1474 rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1475 if (!rxdr->buffer_info) {
1477 "Unable to allocate memory for the receive descriptor ring\n");
1480 memset(rxdr->buffer_info, 0, size);
1482 size = sizeof(struct e1000_ps_page) * rxdr->count;
1483 rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1484 if (!rxdr->ps_page) {
1485 vfree(rxdr->buffer_info);
1487 "Unable to allocate memory for the receive descriptor ring\n");
1490 memset(rxdr->ps_page, 0, size);
1492 size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1493 rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1494 if (!rxdr->ps_page_dma) {
1495 vfree(rxdr->buffer_info);
1496 kfree(rxdr->ps_page);
1498 "Unable to allocate memory for the receive descriptor ring\n");
1501 memset(rxdr->ps_page_dma, 0, size);
1503 if (adapter->hw.mac_type <= e1000_82547_rev_2)
1504 desc_len = sizeof(struct e1000_rx_desc);
1506 desc_len = sizeof(union e1000_rx_desc_packet_split);
1508 /* Round up to nearest 4K */
1510 rxdr->size = rxdr->count * desc_len;
1511 E1000_ROUNDUP(rxdr->size, 4096);
1513 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1517 "Unable to allocate memory for the receive descriptor ring\n");
1519 vfree(rxdr->buffer_info);
1520 kfree(rxdr->ps_page);
1521 kfree(rxdr->ps_page_dma);
1525 /* Fix for errata 23, can't cross 64kB boundary */
1526 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1527 void *olddesc = rxdr->desc;
1528 dma_addr_t olddma = rxdr->dma;
1529 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1530 "at %p\n", rxdr->size, rxdr->desc);
1531 /* Try again, without freeing the previous */
1532 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1533 /* Failed allocation, critical failure */
1535 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1537 "Unable to allocate memory "
1538 "for the receive descriptor ring\n");
1539 goto setup_rx_desc_die;
1542 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1544 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1546 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1548 "Unable to allocate aligned memory "
1549 "for the receive descriptor ring\n");
1550 goto setup_rx_desc_die;
1552 /* Free old allocation, new allocation was successful */
1553 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1556 memset(rxdr->desc, 0, rxdr->size);
1558 rxdr->next_to_clean = 0;
1559 rxdr->next_to_use = 0;
1565 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1566 * (Descriptors) for all queues
1567 * @adapter: board private structure
1569 * If this function returns with an error, then it's possible one or
1570 * more of the rings is populated (while the rest are not). It is the
1571 * callers duty to clean those orphaned rings.
1573 * Return 0 on success, negative on failure
1577 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1581 for (i = 0; i < adapter->num_rx_queues; i++) {
1582 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1585 "Allocation for Rx Queue %u failed\n", i);
1594 * e1000_setup_rctl - configure the receive control registers
1595 * @adapter: Board private structure
1597 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1598 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1600 e1000_setup_rctl(struct e1000_adapter *adapter)
1602 uint32_t rctl, rfctl;
1603 uint32_t psrctl = 0;
1604 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1608 rctl = E1000_READ_REG(&adapter->hw, RCTL);
1610 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1612 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1613 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1614 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1616 if (adapter->hw.mac_type > e1000_82543)
1617 rctl |= E1000_RCTL_SECRC;
1619 if (adapter->hw.tbi_compatibility_on == 1)
1620 rctl |= E1000_RCTL_SBP;
1622 rctl &= ~E1000_RCTL_SBP;
1624 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1625 rctl &= ~E1000_RCTL_LPE;
1627 rctl |= E1000_RCTL_LPE;
1629 /* Setup buffer sizes */
1630 rctl &= ~E1000_RCTL_SZ_4096;
1631 rctl |= E1000_RCTL_BSEX;
1632 switch (adapter->rx_buffer_len) {
1633 case E1000_RXBUFFER_256:
1634 rctl |= E1000_RCTL_SZ_256;
1635 rctl &= ~E1000_RCTL_BSEX;
1637 case E1000_RXBUFFER_512:
1638 rctl |= E1000_RCTL_SZ_512;
1639 rctl &= ~E1000_RCTL_BSEX;
1641 case E1000_RXBUFFER_1024:
1642 rctl |= E1000_RCTL_SZ_1024;
1643 rctl &= ~E1000_RCTL_BSEX;
1645 case E1000_RXBUFFER_2048:
1647 rctl |= E1000_RCTL_SZ_2048;
1648 rctl &= ~E1000_RCTL_BSEX;
1650 case E1000_RXBUFFER_4096:
1651 rctl |= E1000_RCTL_SZ_4096;
1653 case E1000_RXBUFFER_8192:
1654 rctl |= E1000_RCTL_SZ_8192;
1656 case E1000_RXBUFFER_16384:
1657 rctl |= E1000_RCTL_SZ_16384;
1661 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1662 /* 82571 and greater support packet-split where the protocol
1663 * header is placed in skb->data and the packet data is
1664 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1665 * In the case of a non-split, skb->data is linearly filled,
1666 * followed by the page buffers. Therefore, skb->data is
1667 * sized to hold the largest protocol header.
1669 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1670 if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1672 adapter->rx_ps_pages = pages;
1674 adapter->rx_ps_pages = 0;
1676 if (adapter->rx_ps_pages) {
1677 /* Configure extra packet-split registers */
1678 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1679 rfctl |= E1000_RFCTL_EXTEN;
1680 /* disable IPv6 packet split support */
1681 rfctl |= E1000_RFCTL_IPV6_DIS;
1682 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1684 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1686 psrctl |= adapter->rx_ps_bsize0 >>
1687 E1000_PSRCTL_BSIZE0_SHIFT;
1689 switch (adapter->rx_ps_pages) {
1691 psrctl |= PAGE_SIZE <<
1692 E1000_PSRCTL_BSIZE3_SHIFT;
1694 psrctl |= PAGE_SIZE <<
1695 E1000_PSRCTL_BSIZE2_SHIFT;
1697 psrctl |= PAGE_SIZE >>
1698 E1000_PSRCTL_BSIZE1_SHIFT;
1702 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1705 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1709 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1710 * @adapter: board private structure
1712 * Configure the Rx unit of the MAC after a reset.
1716 e1000_configure_rx(struct e1000_adapter *adapter)
1719 struct e1000_hw *hw = &adapter->hw;
1720 uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1722 if (adapter->rx_ps_pages) {
1723 /* this is a 32 byte descriptor */
1724 rdlen = adapter->rx_ring[0].count *
1725 sizeof(union e1000_rx_desc_packet_split);
1726 adapter->clean_rx = e1000_clean_rx_irq_ps;
1727 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1729 rdlen = adapter->rx_ring[0].count *
1730 sizeof(struct e1000_rx_desc);
1731 adapter->clean_rx = e1000_clean_rx_irq;
1732 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1735 /* disable receives while setting up the descriptors */
1736 rctl = E1000_READ_REG(hw, RCTL);
1737 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1739 /* set the Receive Delay Timer Register */
1740 E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1742 if (hw->mac_type >= e1000_82540) {
1743 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1744 if (adapter->itr > 1)
1745 E1000_WRITE_REG(hw, ITR,
1746 1000000000 / (adapter->itr * 256));
1749 if (hw->mac_type >= e1000_82571) {
1750 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1751 /* Reset delay timers after every interrupt */
1752 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1753 #ifdef CONFIG_E1000_NAPI
1754 /* Auto-Mask interrupts upon ICR read. */
1755 ctrl_ext |= E1000_CTRL_EXT_IAME;
1757 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1758 E1000_WRITE_REG(hw, IAM, ~0);
1759 E1000_WRITE_FLUSH(hw);
1762 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1763 * the Base and Length of the Rx Descriptor Ring */
1764 switch (adapter->num_rx_queues) {
1767 rdba = adapter->rx_ring[0].dma;
1768 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1769 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1770 E1000_WRITE_REG(hw, RDLEN, rdlen);
1771 E1000_WRITE_REG(hw, RDH, 0);
1772 E1000_WRITE_REG(hw, RDT, 0);
1773 adapter->rx_ring[0].rdh = E1000_RDH;
1774 adapter->rx_ring[0].rdt = E1000_RDT;
1778 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1779 if (hw->mac_type >= e1000_82543) {
1780 rxcsum = E1000_READ_REG(hw, RXCSUM);
1781 if (adapter->rx_csum == TRUE) {
1782 rxcsum |= E1000_RXCSUM_TUOFL;
1784 /* Enable 82571 IPv4 payload checksum for UDP fragments
1785 * Must be used in conjunction with packet-split. */
1786 if ((hw->mac_type >= e1000_82571) &&
1787 (adapter->rx_ps_pages)) {
1788 rxcsum |= E1000_RXCSUM_IPPCSE;
1791 rxcsum &= ~E1000_RXCSUM_TUOFL;
1792 /* don't need to clear IPPCSE as it defaults to 0 */
1794 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1797 if (hw->mac_type == e1000_82573)
1798 E1000_WRITE_REG(hw, ERT, 0x0100);
1800 /* Enable Receives */
1801 E1000_WRITE_REG(hw, RCTL, rctl);
1805 * e1000_free_tx_resources - Free Tx Resources per Queue
1806 * @adapter: board private structure
1807 * @tx_ring: Tx descriptor ring for a specific queue
1809 * Free all transmit software resources
1813 e1000_free_tx_resources(struct e1000_adapter *adapter,
1814 struct e1000_tx_ring *tx_ring)
1816 struct pci_dev *pdev = adapter->pdev;
1818 e1000_clean_tx_ring(adapter, tx_ring);
1820 vfree(tx_ring->buffer_info);
1821 tx_ring->buffer_info = NULL;
1823 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1825 tx_ring->desc = NULL;
1829 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1830 * @adapter: board private structure
1832 * Free all transmit software resources
1836 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1840 for (i = 0; i < adapter->num_tx_queues; i++)
1841 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1845 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1846 struct e1000_buffer *buffer_info)
1848 if (buffer_info->dma) {
1849 pci_unmap_page(adapter->pdev,
1851 buffer_info->length,
1854 if (buffer_info->skb)
1855 dev_kfree_skb_any(buffer_info->skb);
1856 memset(buffer_info, 0, sizeof(struct e1000_buffer));
1860 * e1000_clean_tx_ring - Free Tx Buffers
1861 * @adapter: board private structure
1862 * @tx_ring: ring to be cleaned
1866 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1867 struct e1000_tx_ring *tx_ring)
1869 struct e1000_buffer *buffer_info;
1873 /* Free all the Tx ring sk_buffs */
1875 for (i = 0; i < tx_ring->count; i++) {
1876 buffer_info = &tx_ring->buffer_info[i];
1877 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1880 size = sizeof(struct e1000_buffer) * tx_ring->count;
1881 memset(tx_ring->buffer_info, 0, size);
1883 /* Zero out the descriptor ring */
1885 memset(tx_ring->desc, 0, tx_ring->size);
1887 tx_ring->next_to_use = 0;
1888 tx_ring->next_to_clean = 0;
1889 tx_ring->last_tx_tso = 0;
1891 writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1892 writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1896 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1897 * @adapter: board private structure
1901 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1905 for (i = 0; i < adapter->num_tx_queues; i++)
1906 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1910 * e1000_free_rx_resources - Free Rx Resources
1911 * @adapter: board private structure
1912 * @rx_ring: ring to clean the resources from
1914 * Free all receive software resources
1918 e1000_free_rx_resources(struct e1000_adapter *adapter,
1919 struct e1000_rx_ring *rx_ring)
1921 struct pci_dev *pdev = adapter->pdev;
1923 e1000_clean_rx_ring(adapter, rx_ring);
1925 vfree(rx_ring->buffer_info);
1926 rx_ring->buffer_info = NULL;
1927 kfree(rx_ring->ps_page);
1928 rx_ring->ps_page = NULL;
1929 kfree(rx_ring->ps_page_dma);
1930 rx_ring->ps_page_dma = NULL;
1932 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1934 rx_ring->desc = NULL;
1938 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1939 * @adapter: board private structure
1941 * Free all receive software resources
1945 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1949 for (i = 0; i < adapter->num_rx_queues; i++)
1950 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1954 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1955 * @adapter: board private structure
1956 * @rx_ring: ring to free buffers from
1960 e1000_clean_rx_ring(struct e1000_adapter *adapter,
1961 struct e1000_rx_ring *rx_ring)
1963 struct e1000_buffer *buffer_info;
1964 struct e1000_ps_page *ps_page;
1965 struct e1000_ps_page_dma *ps_page_dma;
1966 struct pci_dev *pdev = adapter->pdev;
1970 /* Free all the Rx ring sk_buffs */
1971 for (i = 0; i < rx_ring->count; i++) {
1972 buffer_info = &rx_ring->buffer_info[i];
1973 if (buffer_info->skb) {
1974 pci_unmap_single(pdev,
1976 buffer_info->length,
1977 PCI_DMA_FROMDEVICE);
1979 dev_kfree_skb(buffer_info->skb);
1980 buffer_info->skb = NULL;
1982 ps_page = &rx_ring->ps_page[i];
1983 ps_page_dma = &rx_ring->ps_page_dma[i];
1984 for (j = 0; j < adapter->rx_ps_pages; j++) {
1985 if (!ps_page->ps_page[j]) break;
1986 pci_unmap_page(pdev,
1987 ps_page_dma->ps_page_dma[j],
1988 PAGE_SIZE, PCI_DMA_FROMDEVICE);
1989 ps_page_dma->ps_page_dma[j] = 0;
1990 put_page(ps_page->ps_page[j]);
1991 ps_page->ps_page[j] = NULL;
1995 size = sizeof(struct e1000_buffer) * rx_ring->count;
1996 memset(rx_ring->buffer_info, 0, size);
1997 size = sizeof(struct e1000_ps_page) * rx_ring->count;
1998 memset(rx_ring->ps_page, 0, size);
1999 size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2000 memset(rx_ring->ps_page_dma, 0, size);
2002 /* Zero out the descriptor ring */
2004 memset(rx_ring->desc, 0, rx_ring->size);
2006 rx_ring->next_to_clean = 0;
2007 rx_ring->next_to_use = 0;
2009 writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2010 writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2014 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2015 * @adapter: board private structure
2019 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2023 for (i = 0; i < adapter->num_rx_queues; i++)
2024 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2027 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2028 * and memory write and invalidate disabled for certain operations
2031 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2033 struct net_device *netdev = adapter->netdev;
2036 e1000_pci_clear_mwi(&adapter->hw);
2038 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2039 rctl |= E1000_RCTL_RST;
2040 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2041 E1000_WRITE_FLUSH(&adapter->hw);
2044 if (netif_running(netdev))
2045 e1000_clean_all_rx_rings(adapter);
2049 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2051 struct net_device *netdev = adapter->netdev;
2054 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2055 rctl &= ~E1000_RCTL_RST;
2056 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2057 E1000_WRITE_FLUSH(&adapter->hw);
2060 if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2061 e1000_pci_set_mwi(&adapter->hw);
2063 if (netif_running(netdev)) {
2064 /* No need to loop, because 82542 supports only 1 queue */
2065 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2066 e1000_configure_rx(adapter);
2067 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2072 * e1000_set_mac - Change the Ethernet Address of the NIC
2073 * @netdev: network interface device structure
2074 * @p: pointer to an address structure
2076 * Returns 0 on success, negative on failure
2080 e1000_set_mac(struct net_device *netdev, void *p)
2082 struct e1000_adapter *adapter = netdev_priv(netdev);
2083 struct sockaddr *addr = p;
2085 if (!is_valid_ether_addr(addr->sa_data))
2086 return -EADDRNOTAVAIL;
2088 /* 82542 2.0 needs to be in reset to write receive address registers */
2090 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2091 e1000_enter_82542_rst(adapter);
2093 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2094 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2096 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2098 /* With 82571 controllers, LAA may be overwritten (with the default)
2099 * due to controller reset from the other port. */
2100 if (adapter->hw.mac_type == e1000_82571) {
2101 /* activate the work around */
2102 adapter->hw.laa_is_present = 1;
2104 /* Hold a copy of the LAA in RAR[14] This is done so that
2105 * between the time RAR[0] gets clobbered and the time it
2106 * gets fixed (in e1000_watchdog), the actual LAA is in one
2107 * of the RARs and no incoming packets directed to this port
2108 * are dropped. Eventaully the LAA will be in RAR[0] and
2110 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2111 E1000_RAR_ENTRIES - 1);
2114 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2115 e1000_leave_82542_rst(adapter);
2121 * e1000_set_multi - Multicast and Promiscuous mode set
2122 * @netdev: network interface device structure
2124 * The set_multi entry point is called whenever the multicast address
2125 * list or the network interface flags are updated. This routine is
2126 * responsible for configuring the hardware for proper multicast,
2127 * promiscuous mode, and all-multi behavior.
2131 e1000_set_multi(struct net_device *netdev)
2133 struct e1000_adapter *adapter = netdev_priv(netdev);
2134 struct e1000_hw *hw = &adapter->hw;
2135 struct dev_mc_list *mc_ptr;
2137 uint32_t hash_value;
2138 int i, rar_entries = E1000_RAR_ENTRIES;
2140 /* reserve RAR[14] for LAA over-write work-around */
2141 if (adapter->hw.mac_type == e1000_82571)
2144 /* Check for Promiscuous and All Multicast modes */
2146 rctl = E1000_READ_REG(hw, RCTL);
2148 if (netdev->flags & IFF_PROMISC) {
2149 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2150 } else if (netdev->flags & IFF_ALLMULTI) {
2151 rctl |= E1000_RCTL_MPE;
2152 rctl &= ~E1000_RCTL_UPE;
2154 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2157 E1000_WRITE_REG(hw, RCTL, rctl);
2159 /* 82542 2.0 needs to be in reset to write receive address registers */
2161 if (hw->mac_type == e1000_82542_rev2_0)
2162 e1000_enter_82542_rst(adapter);
2164 /* load the first 14 multicast address into the exact filters 1-14
2165 * RAR 0 is used for the station MAC adddress
2166 * if there are not 14 addresses, go ahead and clear the filters
2167 * -- with 82571 controllers only 0-13 entries are filled here
2169 mc_ptr = netdev->mc_list;
2171 for (i = 1; i < rar_entries; i++) {
2173 e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2174 mc_ptr = mc_ptr->next;
2176 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2177 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2181 /* clear the old settings from the multicast hash table */
2183 for (i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2184 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2186 /* load any remaining addresses into the hash table */
2188 for (; mc_ptr; mc_ptr = mc_ptr->next) {
2189 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2190 e1000_mta_set(hw, hash_value);
2193 if (hw->mac_type == e1000_82542_rev2_0)
2194 e1000_leave_82542_rst(adapter);
2197 /* Need to wait a few seconds after link up to get diagnostic information from
2201 e1000_update_phy_info(unsigned long data)
2203 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2204 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2208 * e1000_82547_tx_fifo_stall - Timer Call-back
2209 * @data: pointer to adapter cast into an unsigned long
2213 e1000_82547_tx_fifo_stall(unsigned long data)
2215 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2216 struct net_device *netdev = adapter->netdev;
2219 if (atomic_read(&adapter->tx_fifo_stall)) {
2220 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2221 E1000_READ_REG(&adapter->hw, TDH)) &&
2222 (E1000_READ_REG(&adapter->hw, TDFT) ==
2223 E1000_READ_REG(&adapter->hw, TDFH)) &&
2224 (E1000_READ_REG(&adapter->hw, TDFTS) ==
2225 E1000_READ_REG(&adapter->hw, TDFHS))) {
2226 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2227 E1000_WRITE_REG(&adapter->hw, TCTL,
2228 tctl & ~E1000_TCTL_EN);
2229 E1000_WRITE_REG(&adapter->hw, TDFT,
2230 adapter->tx_head_addr);
2231 E1000_WRITE_REG(&adapter->hw, TDFH,
2232 adapter->tx_head_addr);
2233 E1000_WRITE_REG(&adapter->hw, TDFTS,
2234 adapter->tx_head_addr);
2235 E1000_WRITE_REG(&adapter->hw, TDFHS,
2236 adapter->tx_head_addr);
2237 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2238 E1000_WRITE_FLUSH(&adapter->hw);
2240 adapter->tx_fifo_head = 0;
2241 atomic_set(&adapter->tx_fifo_stall, 0);
2242 netif_wake_queue(netdev);
2244 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2250 * e1000_watchdog - Timer Call-back
2251 * @data: pointer to adapter cast into an unsigned long
2254 e1000_watchdog(unsigned long data)
2256 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2257 struct net_device *netdev = adapter->netdev;
2258 struct e1000_tx_ring *txdr = adapter->tx_ring;
2259 uint32_t link, tctl;
2261 e1000_check_for_link(&adapter->hw);
2262 if (adapter->hw.mac_type == e1000_82573) {
2263 e1000_enable_tx_pkt_filtering(&adapter->hw);
2264 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2265 e1000_update_mng_vlan(adapter);
2268 if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2269 !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2270 link = !adapter->hw.serdes_link_down;
2272 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2275 if (!netif_carrier_ok(netdev)) {
2276 boolean_t txb2b = 1;
2277 e1000_get_speed_and_duplex(&adapter->hw,
2278 &adapter->link_speed,
2279 &adapter->link_duplex);
2281 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2282 adapter->link_speed,
2283 adapter->link_duplex == FULL_DUPLEX ?
2284 "Full Duplex" : "Half Duplex");
2286 /* tweak tx_queue_len according to speed/duplex
2287 * and adjust the timeout factor */
2288 netdev->tx_queue_len = adapter->tx_queue_len;
2289 adapter->tx_timeout_factor = 1;
2290 switch (adapter->link_speed) {
2293 netdev->tx_queue_len = 10;
2294 adapter->tx_timeout_factor = 8;
2298 netdev->tx_queue_len = 100;
2299 /* maybe add some timeout factor ? */
2303 if ((adapter->hw.mac_type == e1000_82571 ||
2304 adapter->hw.mac_type == e1000_82572) &&
2306 #define SPEED_MODE_BIT (1 << 21)
2308 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2309 tarc0 &= ~SPEED_MODE_BIT;
2310 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2314 /* disable TSO for pcie and 10/100 speeds, to avoid
2315 * some hardware issues */
2316 if (!adapter->tso_force &&
2317 adapter->hw.bus_type == e1000_bus_type_pci_express){
2318 switch (adapter->link_speed) {
2322 "10/100 speed: disabling TSO\n");
2323 netdev->features &= ~NETIF_F_TSO;
2326 netdev->features |= NETIF_F_TSO;
2335 /* enable transmits in the hardware, need to do this
2336 * after setting TARC0 */
2337 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2338 tctl |= E1000_TCTL_EN;
2339 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2341 netif_carrier_on(netdev);
2342 netif_wake_queue(netdev);
2343 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2344 adapter->smartspeed = 0;
2347 if (netif_carrier_ok(netdev)) {
2348 adapter->link_speed = 0;
2349 adapter->link_duplex = 0;
2350 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2351 netif_carrier_off(netdev);
2352 netif_stop_queue(netdev);
2353 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2355 /* 80003ES2LAN workaround--
2356 * For packet buffer work-around on link down event;
2357 * disable receives in the ISR and
2358 * reset device here in the watchdog
2360 if (adapter->hw.mac_type == e1000_80003es2lan) {
2362 schedule_work(&adapter->reset_task);
2366 e1000_smartspeed(adapter);
2369 e1000_update_stats(adapter);
2371 adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2372 adapter->tpt_old = adapter->stats.tpt;
2373 adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2374 adapter->colc_old = adapter->stats.colc;
2376 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2377 adapter->gorcl_old = adapter->stats.gorcl;
2378 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2379 adapter->gotcl_old = adapter->stats.gotcl;
2381 e1000_update_adaptive(&adapter->hw);
2383 if (!netif_carrier_ok(netdev)) {
2384 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2385 /* We've lost link, so the controller stops DMA,
2386 * but we've got queued Tx work that's never going
2387 * to get done, so reset controller to flush Tx.
2388 * (Do the reset outside of interrupt context). */
2389 adapter->tx_timeout_count++;
2390 schedule_work(&adapter->reset_task);
2394 /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2395 if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2396 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2397 * asymmetrical Tx or Rx gets ITR=8000; everyone
2398 * else is between 2000-8000. */
2399 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2400 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2401 adapter->gotcl - adapter->gorcl :
2402 adapter->gorcl - adapter->gotcl) / 10000;
2403 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2404 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2407 /* Cause software interrupt to ensure rx ring is cleaned */
2408 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2410 /* Force detection of hung controller every watchdog period */
2411 adapter->detect_tx_hung = TRUE;
2413 /* With 82571 controllers, LAA may be overwritten due to controller
2414 * reset from the other port. Set the appropriate LAA in RAR[0] */
2415 if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2416 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2418 /* Reset the timer */
2419 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2422 #define E1000_TX_FLAGS_CSUM 0x00000001
2423 #define E1000_TX_FLAGS_VLAN 0x00000002
2424 #define E1000_TX_FLAGS_TSO 0x00000004
2425 #define E1000_TX_FLAGS_IPV4 0x00000008
2426 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2427 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2430 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2431 struct sk_buff *skb)
2434 struct e1000_context_desc *context_desc;
2435 struct e1000_buffer *buffer_info;
2437 uint32_t cmd_length = 0;
2438 uint16_t ipcse = 0, tucse, mss;
2439 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2442 if (skb_shinfo(skb)->tso_size) {
2443 if (skb_header_cloned(skb)) {
2444 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2449 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2450 mss = skb_shinfo(skb)->tso_size;
2451 if (skb->protocol == htons(ETH_P_IP)) {
2452 skb->nh.iph->tot_len = 0;
2453 skb->nh.iph->check = 0;
2455 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2460 cmd_length = E1000_TXD_CMD_IP;
2461 ipcse = skb->h.raw - skb->data - 1;
2462 #ifdef NETIF_F_TSO_IPV6
2463 } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
2464 skb->nh.ipv6h->payload_len = 0;
2466 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2467 &skb->nh.ipv6h->daddr,
2474 ipcss = skb->nh.raw - skb->data;
2475 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2476 tucss = skb->h.raw - skb->data;
2477 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2480 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2481 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2483 i = tx_ring->next_to_use;
2484 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2485 buffer_info = &tx_ring->buffer_info[i];
2487 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2488 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2489 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2490 context_desc->upper_setup.tcp_fields.tucss = tucss;
2491 context_desc->upper_setup.tcp_fields.tucso = tucso;
2492 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2493 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2494 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2495 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2497 buffer_info->time_stamp = jiffies;
2499 if (++i == tx_ring->count) i = 0;
2500 tx_ring->next_to_use = i;
2510 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2511 struct sk_buff *skb)
2513 struct e1000_context_desc *context_desc;
2514 struct e1000_buffer *buffer_info;
2518 if (likely(skb->ip_summed == CHECKSUM_HW)) {
2519 css = skb->h.raw - skb->data;
2521 i = tx_ring->next_to_use;
2522 buffer_info = &tx_ring->buffer_info[i];
2523 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2525 context_desc->upper_setup.tcp_fields.tucss = css;
2526 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2527 context_desc->upper_setup.tcp_fields.tucse = 0;
2528 context_desc->tcp_seg_setup.data = 0;
2529 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2531 buffer_info->time_stamp = jiffies;
2533 if (unlikely(++i == tx_ring->count)) i = 0;
2534 tx_ring->next_to_use = i;
2542 #define E1000_MAX_TXD_PWR 12
2543 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2546 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2547 struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2548 unsigned int nr_frags, unsigned int mss)
2550 struct e1000_buffer *buffer_info;
2551 unsigned int len = skb->len;
2552 unsigned int offset = 0, size, count = 0, i;
2554 len -= skb->data_len;
2556 i = tx_ring->next_to_use;
2559 buffer_info = &tx_ring->buffer_info[i];
2560 size = min(len, max_per_txd);
2562 /* Workaround for Controller erratum --
2563 * descriptor for non-tso packet in a linear SKB that follows a
2564 * tso gets written back prematurely before the data is fully
2565 * DMA'd to the controller */
2566 if (!skb->data_len && tx_ring->last_tx_tso &&
2567 !skb_shinfo(skb)->tso_size) {
2568 tx_ring->last_tx_tso = 0;
2572 /* Workaround for premature desc write-backs
2573 * in TSO mode. Append 4-byte sentinel desc */
2574 if (unlikely(mss && !nr_frags && size == len && size > 8))
2577 /* work-around for errata 10 and it applies
2578 * to all controllers in PCI-X mode
2579 * The fix is to make sure that the first descriptor of a
2580 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2582 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2583 (size > 2015) && count == 0))
2586 /* Workaround for potential 82544 hang in PCI-X. Avoid
2587 * terminating buffers within evenly-aligned dwords. */
2588 if (unlikely(adapter->pcix_82544 &&
2589 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2593 buffer_info->length = size;
2595 pci_map_single(adapter->pdev,
2599 buffer_info->time_stamp = jiffies;
2604 if (unlikely(++i == tx_ring->count)) i = 0;
2607 for (f = 0; f < nr_frags; f++) {
2608 struct skb_frag_struct *frag;
2610 frag = &skb_shinfo(skb)->frags[f];
2612 offset = frag->page_offset;
2615 buffer_info = &tx_ring->buffer_info[i];
2616 size = min(len, max_per_txd);
2618 /* Workaround for premature desc write-backs
2619 * in TSO mode. Append 4-byte sentinel desc */
2620 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2623 /* Workaround for potential 82544 hang in PCI-X.
2624 * Avoid terminating buffers within evenly-aligned
2626 if (unlikely(adapter->pcix_82544 &&
2627 !((unsigned long)(frag->page+offset+size-1) & 4) &&
2631 buffer_info->length = size;
2633 pci_map_page(adapter->pdev,
2638 buffer_info->time_stamp = jiffies;
2643 if (unlikely(++i == tx_ring->count)) i = 0;
2647 i = (i == 0) ? tx_ring->count - 1 : i - 1;
2648 tx_ring->buffer_info[i].skb = skb;
2649 tx_ring->buffer_info[first].next_to_watch = i;
2655 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2656 int tx_flags, int count)
2658 struct e1000_tx_desc *tx_desc = NULL;
2659 struct e1000_buffer *buffer_info;
2660 uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2663 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2664 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2666 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2668 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2669 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2672 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2673 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2674 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2677 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2678 txd_lower |= E1000_TXD_CMD_VLE;
2679 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2682 i = tx_ring->next_to_use;
2685 buffer_info = &tx_ring->buffer_info[i];
2686 tx_desc = E1000_TX_DESC(*tx_ring, i);
2687 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2688 tx_desc->lower.data =
2689 cpu_to_le32(txd_lower | buffer_info->length);
2690 tx_desc->upper.data = cpu_to_le32(txd_upper);
2691 if (unlikely(++i == tx_ring->count)) i = 0;
2694 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2696 /* Force memory writes to complete before letting h/w
2697 * know there are new descriptors to fetch. (Only
2698 * applicable for weak-ordered memory model archs,
2699 * such as IA-64). */
2702 tx_ring->next_to_use = i;
2703 writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2707 * 82547 workaround to avoid controller hang in half-duplex environment.
2708 * The workaround is to avoid queuing a large packet that would span
2709 * the internal Tx FIFO ring boundary by notifying the stack to resend
2710 * the packet at a later time. This gives the Tx FIFO an opportunity to
2711 * flush all packets. When that occurs, we reset the Tx FIFO pointers
2712 * to the beginning of the Tx FIFO.
2715 #define E1000_FIFO_HDR 0x10
2716 #define E1000_82547_PAD_LEN 0x3E0
2719 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2721 uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2722 uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2724 E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2726 if (adapter->link_duplex != HALF_DUPLEX)
2727 goto no_fifo_stall_required;
2729 if (atomic_read(&adapter->tx_fifo_stall))
2732 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2733 atomic_set(&adapter->tx_fifo_stall, 1);
2737 no_fifo_stall_required:
2738 adapter->tx_fifo_head += skb_fifo_len;
2739 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2740 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2744 #define MINIMUM_DHCP_PACKET_SIZE 282
2746 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2748 struct e1000_hw *hw = &adapter->hw;
2749 uint16_t length, offset;
2750 if (vlan_tx_tag_present(skb)) {
2751 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2752 ( adapter->hw.mng_cookie.status &
2753 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2756 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2757 struct ethhdr *eth = (struct ethhdr *) skb->data;
2758 if ((htons(ETH_P_IP) == eth->h_proto)) {
2759 const struct iphdr *ip =
2760 (struct iphdr *)((uint8_t *)skb->data+14);
2761 if (IPPROTO_UDP == ip->protocol) {
2762 struct udphdr *udp =
2763 (struct udphdr *)((uint8_t *)ip +
2765 if (ntohs(udp->dest) == 67) {
2766 offset = (uint8_t *)udp + 8 - skb->data;
2767 length = skb->len - offset;
2769 return e1000_mng_write_dhcp_info(hw,
2779 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2781 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2783 struct e1000_adapter *adapter = netdev_priv(netdev);
2784 struct e1000_tx_ring *tx_ring;
2785 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2786 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2787 unsigned int tx_flags = 0;
2788 unsigned int len = skb->len;
2789 unsigned long flags;
2790 unsigned int nr_frags = 0;
2791 unsigned int mss = 0;
2795 len -= skb->data_len;
2797 tx_ring = adapter->tx_ring;
2799 if (unlikely(skb->len <= 0)) {
2800 dev_kfree_skb_any(skb);
2801 return NETDEV_TX_OK;
2805 mss = skb_shinfo(skb)->tso_size;
2806 /* The controller does a simple calculation to
2807 * make sure there is enough room in the FIFO before
2808 * initiating the DMA for each buffer. The calc is:
2809 * 4 = ceil(buffer len/mss). To make sure we don't
2810 * overrun the FIFO, adjust the max buffer len if mss
2814 max_per_txd = min(mss << 2, max_per_txd);
2815 max_txd_pwr = fls(max_per_txd) - 1;
2817 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
2818 * points to just header, pull a few bytes of payload from
2819 * frags into skb->data */
2820 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2821 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
2822 switch (adapter->hw.mac_type) {
2823 unsigned int pull_size;
2827 pull_size = min((unsigned int)4, skb->data_len);
2828 if (!__pskb_pull_tail(skb, pull_size)) {
2830 "__pskb_pull_tail failed.\n");
2831 dev_kfree_skb_any(skb);
2832 return NETDEV_TX_OK;
2834 len = skb->len - skb->data_len;
2843 /* reserve a descriptor for the offload context */
2844 if ((mss) || (skb->ip_summed == CHECKSUM_HW))
2848 if (skb->ip_summed == CHECKSUM_HW)
2853 /* Controller Erratum workaround */
2854 if (!skb->data_len && tx_ring->last_tx_tso &&
2855 !skb_shinfo(skb)->tso_size)
2859 count += TXD_USE_COUNT(len, max_txd_pwr);
2861 if (adapter->pcix_82544)
2864 /* work-around for errata 10 and it applies to all controllers
2865 * in PCI-X mode, so add one more descriptor to the count
2867 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2871 nr_frags = skb_shinfo(skb)->nr_frags;
2872 for (f = 0; f < nr_frags; f++)
2873 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2875 if (adapter->pcix_82544)
2879 if (adapter->hw.tx_pkt_filtering &&
2880 (adapter->hw.mac_type == e1000_82573))
2881 e1000_transfer_dhcp_info(adapter, skb);
2883 local_irq_save(flags);
2884 if (!spin_trylock(&tx_ring->tx_lock)) {
2885 /* Collision - tell upper layer to requeue */
2886 local_irq_restore(flags);
2887 return NETDEV_TX_LOCKED;
2890 /* need: count + 2 desc gap to keep tail from touching
2891 * head, otherwise try next time */
2892 if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2893 netif_stop_queue(netdev);
2894 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2895 return NETDEV_TX_BUSY;
2898 if (unlikely(adapter->hw.mac_type == e1000_82547)) {
2899 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2900 netif_stop_queue(netdev);
2901 mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2902 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2903 return NETDEV_TX_BUSY;
2907 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2908 tx_flags |= E1000_TX_FLAGS_VLAN;
2909 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2912 first = tx_ring->next_to_use;
2914 tso = e1000_tso(adapter, tx_ring, skb);
2916 dev_kfree_skb_any(skb);
2917 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2918 return NETDEV_TX_OK;
2922 tx_ring->last_tx_tso = 1;
2923 tx_flags |= E1000_TX_FLAGS_TSO;
2924 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2925 tx_flags |= E1000_TX_FLAGS_CSUM;
2927 /* Old method was to assume IPv4 packet by default if TSO was enabled.
2928 * 82571 hardware supports TSO capabilities for IPv6 as well...
2929 * no longer assume, we must. */
2930 if (likely(skb->protocol == htons(ETH_P_IP)))
2931 tx_flags |= E1000_TX_FLAGS_IPV4;
2933 e1000_tx_queue(adapter, tx_ring, tx_flags,
2934 e1000_tx_map(adapter, tx_ring, skb, first,
2935 max_per_txd, nr_frags, mss));
2937 netdev->trans_start = jiffies;
2939 /* Make sure there is space in the ring for the next send. */
2940 if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2941 netif_stop_queue(netdev);
2943 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2944 return NETDEV_TX_OK;
2948 * e1000_tx_timeout - Respond to a Tx Hang
2949 * @netdev: network interface device structure
2953 e1000_tx_timeout(struct net_device *netdev)
2955 struct e1000_adapter *adapter = netdev_priv(netdev);
2957 /* Do the reset outside of interrupt context */
2958 adapter->tx_timeout_count++;
2959 schedule_work(&adapter->reset_task);
2963 e1000_reset_task(struct net_device *netdev)
2965 struct e1000_adapter *adapter = netdev_priv(netdev);
2967 e1000_reinit_locked(adapter);
2971 * e1000_get_stats - Get System Network Statistics
2972 * @netdev: network interface device structure
2974 * Returns the address of the device statistics structure.
2975 * The statistics are actually updated from the timer callback.
2978 static struct net_device_stats *
2979 e1000_get_stats(struct net_device *netdev)
2981 struct e1000_adapter *adapter = netdev_priv(netdev);
2983 /* only return the current stats */
2984 return &adapter->net_stats;
2988 * e1000_change_mtu - Change the Maximum Transfer Unit
2989 * @netdev: network interface device structure
2990 * @new_mtu: new value for maximum frame size
2992 * Returns 0 on success, negative on failure
2996 e1000_change_mtu(struct net_device *netdev, int new_mtu)
2998 struct e1000_adapter *adapter = netdev_priv(netdev);
2999 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3000 uint16_t eeprom_data = 0;
3002 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3003 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3004 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3008 /* Adapter-specific max frame size limits. */
3009 switch (adapter->hw.mac_type) {
3010 case e1000_undefined ... e1000_82542_rev2_1:
3011 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3012 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3017 /* only enable jumbo frames if ASPM is disabled completely
3018 * this means both bits must be zero in 0x1A bits 3:2 */
3019 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3021 if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) {
3022 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3024 "Jumbo Frames not supported.\n");
3029 /* fall through to get support */
3032 case e1000_80003es2lan:
3033 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3034 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3035 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3040 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3044 /* NOTE: dev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3045 * means we reserve 2 more, this pushes us to allocate from the next
3047 * i.e. RXBUFFER_2048 --> size-4096 slab */
3049 if (max_frame <= E1000_RXBUFFER_256)
3050 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3051 else if (max_frame <= E1000_RXBUFFER_512)
3052 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3053 else if (max_frame <= E1000_RXBUFFER_1024)
3054 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3055 else if (max_frame <= E1000_RXBUFFER_2048)
3056 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3057 else if (max_frame <= E1000_RXBUFFER_4096)
3058 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3059 else if (max_frame <= E1000_RXBUFFER_8192)
3060 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3061 else if (max_frame <= E1000_RXBUFFER_16384)
3062 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3064 /* adjust allocation if LPE protects us, and we aren't using SBP */
3065 #define MAXIMUM_ETHERNET_VLAN_SIZE 1522
3066 if (!adapter->hw.tbi_compatibility_on &&
3067 ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3068 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3069 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3071 netdev->mtu = new_mtu;
3073 if (netif_running(netdev))
3074 e1000_reinit_locked(adapter);
3076 adapter->hw.max_frame_size = max_frame;
3082 * e1000_update_stats - Update the board statistics counters
3083 * @adapter: board private structure
3087 e1000_update_stats(struct e1000_adapter *adapter)
3089 struct e1000_hw *hw = &adapter->hw;
3090 struct pci_dev *pdev = adapter->pdev;
3091 unsigned long flags;
3094 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3097 * Prevent stats update while adapter is being reset, or if the pci
3098 * connection is down.
3100 if (adapter->link_speed == 0)
3102 if (pdev->error_state && pdev->error_state != pci_channel_io_normal)
3105 spin_lock_irqsave(&adapter->stats_lock, flags);
3107 /* these counters are modified from e1000_adjust_tbi_stats,
3108 * called from the interrupt context, so they must only
3109 * be written while holding adapter->stats_lock
3112 adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3113 adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3114 adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3115 adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3116 adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3117 adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3118 adapter->stats.roc += E1000_READ_REG(hw, ROC);
3119 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3120 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3121 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3122 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3123 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3124 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3126 adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3127 adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3128 adapter->stats.scc += E1000_READ_REG(hw, SCC);
3129 adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3130 adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3131 adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3132 adapter->stats.dc += E1000_READ_REG(hw, DC);
3133 adapter->stats.sec += E1000_READ_REG(hw, SEC);
3134 adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3135 adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3136 adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3137 adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3138 adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3139 adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3140 adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3141 adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3142 adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3143 adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3144 adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3145 adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3146 adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3147 adapter->stats.torl += E1000_READ_REG(hw, TORL);
3148 adapter->stats.torh += E1000_READ_REG(hw, TORH);
3149 adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3150 adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3151 adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3152 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3153 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3154 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3155 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3156 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3157 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3158 adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3159 adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3161 /* used for adaptive IFS */
3163 hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3164 adapter->stats.tpt += hw->tx_packet_delta;
3165 hw->collision_delta = E1000_READ_REG(hw, COLC);
3166 adapter->stats.colc += hw->collision_delta;
3168 if (hw->mac_type >= e1000_82543) {
3169 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3170 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3171 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3172 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3173 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3174 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3176 if (hw->mac_type > e1000_82547_rev_2) {
3177 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3178 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3179 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3180 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3181 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3182 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3183 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3184 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3185 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3188 /* Fill out the OS statistics structure */
3190 adapter->net_stats.rx_packets = adapter->stats.gprc;
3191 adapter->net_stats.tx_packets = adapter->stats.gptc;
3192 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3193 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3194 adapter->net_stats.multicast = adapter->stats.mprc;
3195 adapter->net_stats.collisions = adapter->stats.colc;
3199 /* RLEC on some newer hardware can be incorrect so build
3200 * our own version based on RUC and ROC */
3201 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3202 adapter->stats.crcerrs + adapter->stats.algnerrc +
3203 adapter->stats.ruc + adapter->stats.roc +
3204 adapter->stats.cexterr;
3205 adapter->net_stats.rx_length_errors = adapter->stats.ruc +
3207 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3208 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3209 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3213 adapter->net_stats.tx_errors = adapter->stats.ecol +
3214 adapter->stats.latecol;
3215 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3216 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3217 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3219 /* Tx Dropped needs to be maintained elsewhere */
3223 if (hw->media_type == e1000_media_type_copper) {
3224 if ((adapter->link_speed == SPEED_1000) &&
3225 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3226 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3227 adapter->phy_stats.idle_errors += phy_tmp;
3230 if ((hw->mac_type <= e1000_82546) &&
3231 (hw->phy_type == e1000_phy_m88) &&
3232 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3233 adapter->phy_stats.receive_errors += phy_tmp;
3236 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3240 * e1000_intr - Interrupt Handler
3241 * @irq: interrupt number
3242 * @data: pointer to a network interface device structure
3243 * @pt_regs: CPU registers structure
3247 e1000_intr(int irq, void *data, struct pt_regs *regs)
3249 struct net_device *netdev = data;
3250 struct e1000_adapter *adapter = netdev_priv(netdev);
3251 struct e1000_hw *hw = &adapter->hw;
3252 uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3253 #ifndef CONFIG_E1000_NAPI
3256 /* Interrupt Auto-Mask...upon reading ICR,
3257 * interrupts are masked. No need for the
3258 * IMC write, but it does mean we should
3259 * account for it ASAP. */
3260 if (likely(hw->mac_type >= e1000_82571))
3261 atomic_inc(&adapter->irq_sem);
3264 if (unlikely(!icr)) {
3265 #ifdef CONFIG_E1000_NAPI
3266 if (hw->mac_type >= e1000_82571)
3267 e1000_irq_enable(adapter);
3269 return IRQ_NONE; /* Not our interrupt */
3272 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3273 hw->get_link_status = 1;
3274 /* 80003ES2LAN workaround--
3275 * For packet buffer work-around on link down event;
3276 * disable receives here in the ISR and
3277 * reset adapter in watchdog
3279 if (netif_carrier_ok(netdev) &&
3280 (adapter->hw.mac_type == e1000_80003es2lan)) {
3281 /* disable receives */
3282 rctl = E1000_READ_REG(hw, RCTL);
3283 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3285 mod_timer(&adapter->watchdog_timer, jiffies);
3288 #ifdef CONFIG_E1000_NAPI
3289 if (unlikely(hw->mac_type < e1000_82571)) {
3290 atomic_inc(&adapter->irq_sem);
3291 E1000_WRITE_REG(hw, IMC, ~0);
3292 E1000_WRITE_FLUSH(hw);
3294 if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3295 __netif_rx_schedule(&adapter->polling_netdev[0]);
3297 e1000_irq_enable(adapter);
3299 /* Writing IMC and IMS is needed for 82547.
3300 * Due to Hub Link bus being occupied, an interrupt
3301 * de-assertion message is not able to be sent.
3302 * When an interrupt assertion message is generated later,
3303 * two messages are re-ordered and sent out.
3304 * That causes APIC to think 82547 is in de-assertion
3305 * state, while 82547 is in assertion state, resulting
3306 * in dead lock. Writing IMC forces 82547 into
3307 * de-assertion state.
3309 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3310 atomic_inc(&adapter->irq_sem);
3311 E1000_WRITE_REG(hw, IMC, ~0);
3314 for (i = 0; i < E1000_MAX_INTR; i++)
3315 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3316 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3319 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3320 e1000_irq_enable(adapter);
3327 #ifdef CONFIG_E1000_NAPI
3329 * e1000_clean - NAPI Rx polling callback
3330 * @adapter: board private structure
3334 e1000_clean(struct net_device *poll_dev, int *budget)
3336 struct e1000_adapter *adapter;
3337 int work_to_do = min(*budget, poll_dev->quota);
3338 int tx_cleaned = 0, i = 0, work_done = 0;
3340 /* Must NOT use netdev_priv macro here. */
3341 adapter = poll_dev->priv;
3343 /* Keep link state information with original netdev */
3344 if (!netif_carrier_ok(adapter->netdev))
3347 while (poll_dev != &adapter->polling_netdev[i]) {
3349 BUG_ON(i == adapter->num_rx_queues);
3352 if (likely(adapter->num_tx_queues == 1)) {
3353 /* e1000_clean is called per-cpu. This lock protects
3354 * tx_ring[0] from being cleaned by multiple cpus
3355 * simultaneously. A failure obtaining the lock means
3356 * tx_ring[0] is currently being cleaned anyway. */
3357 if (spin_trylock(&adapter->tx_queue_lock)) {
3358 tx_cleaned = e1000_clean_tx_irq(adapter,
3359 &adapter->tx_ring[0]);
3360 spin_unlock(&adapter->tx_queue_lock);
3363 tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3365 adapter->clean_rx(adapter, &adapter->rx_ring[i],
3366 &work_done, work_to_do);
3368 *budget -= work_done;
3369 poll_dev->quota -= work_done;
3371 /* If no Tx and not enough Rx work done, exit the polling mode */
3372 if ((!tx_cleaned && (work_done == 0)) ||
3373 !netif_running(adapter->netdev)) {
3375 netif_rx_complete(poll_dev);
3376 e1000_irq_enable(adapter);
3385 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3386 * @adapter: board private structure
3390 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3391 struct e1000_tx_ring *tx_ring)
3393 struct net_device *netdev = adapter->netdev;
3394 struct e1000_tx_desc *tx_desc, *eop_desc;
3395 struct e1000_buffer *buffer_info;
3396 unsigned int i, eop;
3397 #ifdef CONFIG_E1000_NAPI
3398 unsigned int count = 0;
3400 boolean_t cleaned = FALSE;
3402 i = tx_ring->next_to_clean;
3403 eop = tx_ring->buffer_info[i].next_to_watch;
3404 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3406 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3407 for (cleaned = FALSE; !cleaned; ) {
3408 tx_desc = E1000_TX_DESC(*tx_ring, i);
3409 buffer_info = &tx_ring->buffer_info[i];
3410 cleaned = (i == eop);
3412 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3413 memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
3415 if (unlikely(++i == tx_ring->count)) i = 0;
3419 eop = tx_ring->buffer_info[i].next_to_watch;
3420 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3421 #ifdef CONFIG_E1000_NAPI
3422 #define E1000_TX_WEIGHT 64
3423 /* weight of a sort for tx, to avoid endless transmit cleanup */
3424 if (count++ == E1000_TX_WEIGHT) break;
3428 tx_ring->next_to_clean = i;
3430 #define TX_WAKE_THRESHOLD 32
3431 if (unlikely(cleaned && netif_queue_stopped(netdev) &&
3432 netif_carrier_ok(netdev))) {
3433 spin_lock(&tx_ring->tx_lock);
3434 if (netif_queue_stopped(netdev) &&
3435 (E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))
3436 netif_wake_queue(netdev);
3437 spin_unlock(&tx_ring->tx_lock);
3440 if (adapter->detect_tx_hung) {
3441 /* Detect a transmit hang in hardware, this serializes the
3442 * check with the clearing of time_stamp and movement of i */
3443 adapter->detect_tx_hung = FALSE;
3444 if (tx_ring->buffer_info[eop].dma &&
3445 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3446 (adapter->tx_timeout_factor * HZ))
3447 && !(E1000_READ_REG(&adapter->hw, STATUS) &
3448 E1000_STATUS_TXOFF)) {
3450 /* detected Tx unit hang */
3451 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3455 " next_to_use <%x>\n"
3456 " next_to_clean <%x>\n"
3457 "buffer_info[next_to_clean]\n"
3458 " time_stamp <%lx>\n"
3459 " next_to_watch <%x>\n"
3461 " next_to_watch.status <%x>\n",
3462 (unsigned long)((tx_ring - adapter->tx_ring) /
3463 sizeof(struct e1000_tx_ring)),
3464 readl(adapter->hw.hw_addr + tx_ring->tdh),
3465 readl(adapter->hw.hw_addr + tx_ring->tdt),
3466 tx_ring->next_to_use,
3467 tx_ring->next_to_clean,
3468 tx_ring->buffer_info[eop].time_stamp,
3471 eop_desc->upper.fields.status);
3472 netif_stop_queue(netdev);
3479 * e1000_rx_checksum - Receive Checksum Offload for 82543
3480 * @adapter: board private structure
3481 * @status_err: receive descriptor status and error fields
3482 * @csum: receive descriptor csum field
3483 * @sk_buff: socket buffer with received data
3487 e1000_rx_checksum(struct e1000_adapter *adapter,
3488 uint32_t status_err, uint32_t csum,
3489 struct sk_buff *skb)
3491 uint16_t status = (uint16_t)status_err;
3492 uint8_t errors = (uint8_t)(status_err >> 24);
3493 skb->ip_summed = CHECKSUM_NONE;
3495 /* 82543 or newer only */
3496 if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
3497 /* Ignore Checksum bit is set */
3498 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3499 /* TCP/UDP checksum error bit is set */
3500 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3501 /* let the stack verify checksum errors */
3502 adapter->hw_csum_err++;
3505 /* TCP/UDP Checksum has not been calculated */
3506 if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3507 if (!(status & E1000_RXD_STAT_TCPCS))
3510 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3513 /* It must be a TCP or UDP packet with a valid checksum */
3514 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3515 /* TCP checksum is good */
3516 skb->ip_summed = CHECKSUM_UNNECESSARY;
3517 } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3518 /* IP fragment with UDP payload */
3519 /* Hardware complements the payload checksum, so we undo it
3520 * and then put the value in host order for further stack use.
3522 csum = ntohl(csum ^ 0xFFFF);
3524 skb->ip_summed = CHECKSUM_HW;
3526 adapter->hw_csum_good++;
3530 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3531 * @adapter: board private structure
3535 #ifdef CONFIG_E1000_NAPI
3536 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3537 struct e1000_rx_ring *rx_ring,
3538 int *work_done, int work_to_do)
3540 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3541 struct e1000_rx_ring *rx_ring)
3544 struct net_device *netdev = adapter->netdev;
3545 struct pci_dev *pdev = adapter->pdev;
3546 struct e1000_rx_desc *rx_desc, *next_rxd;
3547 struct e1000_buffer *buffer_info, *next_buffer;
3548 unsigned long flags;
3552 int cleaned_count = 0;
3553 boolean_t cleaned = FALSE;
3555 i = rx_ring->next_to_clean;
3556 rx_desc = E1000_RX_DESC(*rx_ring, i);
3557 buffer_info = &rx_ring->buffer_info[i];
3559 while (rx_desc->status & E1000_RXD_STAT_DD) {
3560 struct sk_buff *skb;
3562 #ifdef CONFIG_E1000_NAPI
3563 if (*work_done >= work_to_do)
3567 status = rx_desc->status;
3568 skb = buffer_info->skb;
3569 buffer_info->skb = NULL;
3571 prefetch(skb->data - NET_IP_ALIGN);
3573 if (++i == rx_ring->count) i = 0;
3574 next_rxd = E1000_RX_DESC(*rx_ring, i);
3577 next_buffer = &rx_ring->buffer_info[i];
3581 pci_unmap_single(pdev,
3583 buffer_info->length,
3584 PCI_DMA_FROMDEVICE);
3586 length = le16_to_cpu(rx_desc->length);
3588 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
3589 /* All receives must fit into a single buffer */
3590 E1000_DBG("%s: Receive packet consumed multiple"
3591 " buffers\n", netdev->name);
3592 dev_kfree_skb_irq(skb);
3596 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3597 last_byte = *(skb->data + length - 1);
3598 if (TBI_ACCEPT(&adapter->hw, status,
3599 rx_desc->errors, length, last_byte)) {
3600 spin_lock_irqsave(&adapter->stats_lock, flags);
3601 e1000_tbi_adjust_stats(&adapter->hw,
3604 spin_unlock_irqrestore(&adapter->stats_lock,
3609 buffer_info->skb = skb;
3614 /* code added for copybreak, this should improve
3615 * performance for small packets with large amounts
3616 * of reassembly being done in the stack */
3617 #define E1000_CB_LENGTH 256
3618 if (length < E1000_CB_LENGTH) {
3619 struct sk_buff *new_skb =
3620 dev_alloc_skb(length + NET_IP_ALIGN);
3622 skb_reserve(new_skb, NET_IP_ALIGN);
3623 new_skb->dev = netdev;
3624 memcpy(new_skb->data - NET_IP_ALIGN,
3625 skb->data - NET_IP_ALIGN,
3626 length + NET_IP_ALIGN);
3627 /* save the skb in buffer_info as good */
3628 buffer_info->skb = skb;
3630 skb_put(skb, length);
3633 skb_put(skb, length);
3635 /* end copybreak code */
3637 /* Receive Checksum Offload */
3638 e1000_rx_checksum(adapter,
3639 (uint32_t)(status) |
3640 ((uint32_t)(rx_desc->errors) << 24),
3641 le16_to_cpu(rx_desc->csum), skb);
3643 skb->protocol = eth_type_trans(skb, netdev);
3644 #ifdef CONFIG_E1000_NAPI
3645 if (unlikely(adapter->vlgrp &&
3646 (status & E1000_RXD_STAT_VP))) {
3647 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3648 le16_to_cpu(rx_desc->special) &
3649 E1000_RXD_SPC_VLAN_MASK);
3651 netif_receive_skb(skb);
3653 #else /* CONFIG_E1000_NAPI */
3654 if (unlikely(adapter->vlgrp &&
3655 (status & E1000_RXD_STAT_VP))) {
3656 vlan_hwaccel_rx(skb, adapter->vlgrp,
3657 le16_to_cpu(rx_desc->special) &
3658 E1000_RXD_SPC_VLAN_MASK);
3662 #endif /* CONFIG_E1000_NAPI */
3663 netdev->last_rx = jiffies;
3666 rx_desc->status = 0;
3668 /* return some buffers to hardware, one at a time is too slow */
3669 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3670 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3674 /* use prefetched values */
3676 buffer_info = next_buffer;
3678 rx_ring->next_to_clean = i;
3680 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3682 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3688 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3689 * @adapter: board private structure
3693 #ifdef CONFIG_E1000_NAPI
3694 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3695 struct e1000_rx_ring *rx_ring,
3696 int *work_done, int work_to_do)
3698 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3699 struct e1000_rx_ring *rx_ring)
3702 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
3703 struct net_device *netdev = adapter->netdev;
3704 struct pci_dev *pdev = adapter->pdev;
3705 struct e1000_buffer *buffer_info, *next_buffer;
3706 struct e1000_ps_page *ps_page;
3707 struct e1000_ps_page_dma *ps_page_dma;
3708 struct sk_buff *skb;
3710 uint32_t length, staterr;
3711 int cleaned_count = 0;
3712 boolean_t cleaned = FALSE;
3714 i = rx_ring->next_to_clean;
3715 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3716 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3717 buffer_info = &rx_ring->buffer_info[i];
3719 while (staterr & E1000_RXD_STAT_DD) {
3720 ps_page = &rx_ring->ps_page[i];
3721 ps_page_dma = &rx_ring->ps_page_dma[i];
3722 #ifdef CONFIG_E1000_NAPI
3723 if (unlikely(*work_done >= work_to_do))
3727 skb = buffer_info->skb;
3729 /* in the packet split case this is header only */
3730 prefetch(skb->data - NET_IP_ALIGN);
3732 if (++i == rx_ring->count) i = 0;
3733 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
3736 next_buffer = &rx_ring->buffer_info[i];
3740 pci_unmap_single(pdev, buffer_info->dma,
3741 buffer_info->length,
3742 PCI_DMA_FROMDEVICE);
3744 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3745 E1000_DBG("%s: Packet Split buffers didn't pick up"
3746 " the full packet\n", netdev->name);
3747 dev_kfree_skb_irq(skb);
3751 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3752 dev_kfree_skb_irq(skb);
3756 length = le16_to_cpu(rx_desc->wb.middle.length0);
3758 if (unlikely(!length)) {
3759 E1000_DBG("%s: Last part of the packet spanning"
3760 " multiple descriptors\n", netdev->name);
3761 dev_kfree_skb_irq(skb);
3766 skb_put(skb, length);
3769 /* this looks ugly, but it seems compiler issues make it
3770 more efficient than reusing j */
3771 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
3773 /* page alloc/put takes too long and effects small packet
3774 * throughput, so unsplit small packets and save the alloc/put*/
3775 if (l1 && ((length + l1) <= adapter->rx_ps_bsize0)) {
3777 /* there is no documentation about how to call
3778 * kmap_atomic, so we can't hold the mapping
3780 pci_dma_sync_single_for_cpu(pdev,
3781 ps_page_dma->ps_page_dma[0],
3783 PCI_DMA_FROMDEVICE);
3784 vaddr = kmap_atomic(ps_page->ps_page[0],
3785 KM_SKB_DATA_SOFTIRQ);
3786 memcpy(skb->tail, vaddr, l1);
3787 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
3788 pci_dma_sync_single_for_device(pdev,
3789 ps_page_dma->ps_page_dma[0],
3790 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3797 for (j = 0; j < adapter->rx_ps_pages; j++) {
3798 if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
3800 pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3801 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3802 ps_page_dma->ps_page_dma[j] = 0;
3803 skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
3805 ps_page->ps_page[j] = NULL;
3807 skb->data_len += length;
3808 skb->truesize += length;
3812 e1000_rx_checksum(adapter, staterr,
3813 le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
3814 skb->protocol = eth_type_trans(skb, netdev);
3816 if (likely(rx_desc->wb.upper.header_status &
3817 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
3818 adapter->rx_hdr_split++;
3819 #ifdef CONFIG_E1000_NAPI
3820 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3821 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3822 le16_to_cpu(rx_desc->wb.middle.vlan) &
3823 E1000_RXD_SPC_VLAN_MASK);
3825 netif_receive_skb(skb);
3827 #else /* CONFIG_E1000_NAPI */
3828 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3829 vlan_hwaccel_rx(skb, adapter->vlgrp,
3830 le16_to_cpu(rx_desc->wb.middle.vlan) &
3831 E1000_RXD_SPC_VLAN_MASK);
3835 #endif /* CONFIG_E1000_NAPI */
3836 netdev->last_rx = jiffies;
3839 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
3840 buffer_info->skb = NULL;
3842 /* return some buffers to hardware, one at a time is too slow */
3843 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3844 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3848 /* use prefetched values */
3850 buffer_info = next_buffer;
3852 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3854 rx_ring->next_to_clean = i;
3856 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3858 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3864 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3865 * @adapter: address of board private structure
3869 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3870 struct e1000_rx_ring *rx_ring,
3873 struct net_device *netdev = adapter->netdev;
3874 struct pci_dev *pdev = adapter->pdev;
3875 struct e1000_rx_desc *rx_desc;
3876 struct e1000_buffer *buffer_info;
3877 struct sk_buff *skb;
3879 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3881 i = rx_ring->next_to_use;
3882 buffer_info = &rx_ring->buffer_info[i];
3884 while (cleaned_count--) {
3885 if (!(skb = buffer_info->skb))
3886 skb = dev_alloc_skb(bufsz);
3892 if (unlikely(!skb)) {
3893 /* Better luck next round */
3894 adapter->alloc_rx_buff_failed++;
3898 /* Fix for errata 23, can't cross 64kB boundary */
3899 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3900 struct sk_buff *oldskb = skb;
3901 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3902 "at %p\n", bufsz, skb->data);
3903 /* Try again, without freeing the previous */
3904 skb = dev_alloc_skb(bufsz);
3905 /* Failed allocation, critical failure */
3907 dev_kfree_skb(oldskb);
3911 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3914 dev_kfree_skb(oldskb);
3915 break; /* while !buffer_info->skb */
3917 /* Use new allocation */
3918 dev_kfree_skb(oldskb);
3921 /* Make buffer alignment 2 beyond a 16 byte boundary
3922 * this will result in a 16 byte aligned IP header after
3923 * the 14 byte MAC header is removed
3925 skb_reserve(skb, NET_IP_ALIGN);
3929 buffer_info->skb = skb;
3930 buffer_info->length = adapter->rx_buffer_len;
3932 buffer_info->dma = pci_map_single(pdev,
3934 adapter->rx_buffer_len,
3935 PCI_DMA_FROMDEVICE);
3937 /* Fix for errata 23, can't cross 64kB boundary */
3938 if (!e1000_check_64k_bound(adapter,
3939 (void *)(unsigned long)buffer_info->dma,
3940 adapter->rx_buffer_len)) {
3941 DPRINTK(RX_ERR, ERR,
3942 "dma align check failed: %u bytes at %p\n",
3943 adapter->rx_buffer_len,
3944 (void *)(unsigned long)buffer_info->dma);
3946 buffer_info->skb = NULL;
3948 pci_unmap_single(pdev, buffer_info->dma,
3949 adapter->rx_buffer_len,
3950 PCI_DMA_FROMDEVICE);
3952 break; /* while !buffer_info->skb */
3954 rx_desc = E1000_RX_DESC(*rx_ring, i);
3955 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3957 if (unlikely(++i == rx_ring->count))
3959 buffer_info = &rx_ring->buffer_info[i];
3962 if (likely(rx_ring->next_to_use != i)) {
3963 rx_ring->next_to_use = i;
3964 if (unlikely(i-- == 0))
3965 i = (rx_ring->count - 1);
3967 /* Force memory writes to complete before letting h/w
3968 * know there are new descriptors to fetch. (Only
3969 * applicable for weak-ordered memory model archs,
3970 * such as IA-64). */
3972 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3977 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3978 * @adapter: address of board private structure
3982 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3983 struct e1000_rx_ring *rx_ring,
3986 struct net_device *netdev = adapter->netdev;
3987 struct pci_dev *pdev = adapter->pdev;
3988 union e1000_rx_desc_packet_split *rx_desc;
3989 struct e1000_buffer *buffer_info;
3990 struct e1000_ps_page *ps_page;
3991 struct e1000_ps_page_dma *ps_page_dma;
3992 struct sk_buff *skb;
3995 i = rx_ring->next_to_use;
3996 buffer_info = &rx_ring->buffer_info[i];
3997 ps_page = &rx_ring->ps_page[i];
3998 ps_page_dma = &rx_ring->ps_page_dma[i];
4000 while (cleaned_count--) {
4001 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4003 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4004 if (j < adapter->rx_ps_pages) {
4005 if (likely(!ps_page->ps_page[j])) {
4006 ps_page->ps_page[j] =
4007 alloc_page(GFP_ATOMIC);
4008 if (unlikely(!ps_page->ps_page[j])) {
4009 adapter->alloc_rx_buff_failed++;
4012 ps_page_dma->ps_page_dma[j] =
4014 ps_page->ps_page[j],
4016 PCI_DMA_FROMDEVICE);
4018 /* Refresh the desc even if buffer_addrs didn't
4019 * change because each write-back erases
4022 rx_desc->read.buffer_addr[j+1] =
4023 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4025 rx_desc->read.buffer_addr[j+1] = ~0;
4028 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4030 if (unlikely(!skb)) {
4031 adapter->alloc_rx_buff_failed++;
4035 /* Make buffer alignment 2 beyond a 16 byte boundary
4036 * this will result in a 16 byte aligned IP header after
4037 * the 14 byte MAC header is removed
4039 skb_reserve(skb, NET_IP_ALIGN);
4043 buffer_info->skb = skb;
4044 buffer_info->length = adapter->rx_ps_bsize0;
4045 buffer_info->dma = pci_map_single(pdev, skb->data,
4046 adapter->rx_ps_bsize0,
4047 PCI_DMA_FROMDEVICE);
4049 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4051 if (unlikely(++i == rx_ring->count)) i = 0;
4052 buffer_info = &rx_ring->buffer_info[i];
4053 ps_page = &rx_ring->ps_page[i];
4054 ps_page_dma = &rx_ring->ps_page_dma[i];
4058 if (likely(rx_ring->next_to_use != i)) {
4059 rx_ring->next_to_use = i;
4060 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4062 /* Force memory writes to complete before letting h/w
4063 * know there are new descriptors to fetch. (Only
4064 * applicable for weak-ordered memory model archs,
4065 * such as IA-64). */
4067 /* Hardware increments by 16 bytes, but packet split
4068 * descriptors are 32 bytes...so we increment tail
4071 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4076 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4081 e1000_smartspeed(struct e1000_adapter *adapter)
4083 uint16_t phy_status;
4086 if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4087 !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4090 if (adapter->smartspeed == 0) {
4091 /* If Master/Slave config fault is asserted twice,
4092 * we assume back-to-back */
4093 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4094 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4095 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4096 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4097 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4098 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4099 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4100 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4102 adapter->smartspeed++;
4103 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4104 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4106 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4107 MII_CR_RESTART_AUTO_NEG);
4108 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4113 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4114 /* If still no link, perhaps using 2/3 pair cable */
4115 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4116 phy_ctrl |= CR_1000T_MS_ENABLE;
4117 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4118 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4119 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4120 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4121 MII_CR_RESTART_AUTO_NEG);
4122 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4125 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4126 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4127 adapter->smartspeed = 0;
4138 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4144 return e1000_mii_ioctl(netdev, ifr, cmd);
4158 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4160 struct e1000_adapter *adapter = netdev_priv(netdev);
4161 struct mii_ioctl_data *data = if_mii(ifr);
4165 unsigned long flags;
4167 if (adapter->hw.media_type != e1000_media_type_copper)
4172 data->phy_id = adapter->hw.phy_addr;
4175 if (!capable(CAP_NET_ADMIN))
4177 spin_lock_irqsave(&adapter->stats_lock, flags);
4178 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4180 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4183 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4186 if (!capable(CAP_NET_ADMIN))
4188 if (data->reg_num & ~(0x1F))
4190 mii_reg = data->val_in;
4191 spin_lock_irqsave(&adapter->stats_lock, flags);
4192 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4194 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4197 if (adapter->hw.media_type == e1000_media_type_copper) {
4198 switch (data->reg_num) {
4200 if (mii_reg & MII_CR_POWER_DOWN)
4202 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4203 adapter->hw.autoneg = 1;
4204 adapter->hw.autoneg_advertised = 0x2F;
4207 spddplx = SPEED_1000;
4208 else if (mii_reg & 0x2000)
4209 spddplx = SPEED_100;
4212 spddplx += (mii_reg & 0x100)
4215 retval = e1000_set_spd_dplx(adapter,
4218 spin_unlock_irqrestore(
4219 &adapter->stats_lock,
4224 if (netif_running(adapter->netdev))
4225 e1000_reinit_locked(adapter);
4227 e1000_reset(adapter);
4229 case M88E1000_PHY_SPEC_CTRL:
4230 case M88E1000_EXT_PHY_SPEC_CTRL:
4231 if (e1000_phy_reset(&adapter->hw)) {
4232 spin_unlock_irqrestore(
4233 &adapter->stats_lock, flags);
4239 switch (data->reg_num) {
4241 if (mii_reg & MII_CR_POWER_DOWN)
4243 if (netif_running(adapter->netdev))
4244 e1000_reinit_locked(adapter);
4246 e1000_reset(adapter);
4250 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4255 return E1000_SUCCESS;
4259 e1000_pci_set_mwi(struct e1000_hw *hw)
4261 struct e1000_adapter *adapter = hw->back;
4262 int ret_val = pci_set_mwi(adapter->pdev);
4265 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4269 e1000_pci_clear_mwi(struct e1000_hw *hw)
4271 struct e1000_adapter *adapter = hw->back;
4273 pci_clear_mwi(adapter->pdev);
4277 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4279 struct e1000_adapter *adapter = hw->back;
4281 pci_read_config_word(adapter->pdev, reg, value);
4285 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4287 struct e1000_adapter *adapter = hw->back;
4289 pci_write_config_word(adapter->pdev, reg, *value);
4293 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4299 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4305 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4307 struct e1000_adapter *adapter = netdev_priv(netdev);
4308 uint32_t ctrl, rctl;
4310 e1000_irq_disable(adapter);
4311 adapter->vlgrp = grp;
4314 /* enable VLAN tag insert/strip */
4315 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4316 ctrl |= E1000_CTRL_VME;
4317 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4319 /* enable VLAN receive filtering */
4320 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4321 rctl |= E1000_RCTL_VFE;
4322 rctl &= ~E1000_RCTL_CFIEN;
4323 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4324 e1000_update_mng_vlan(adapter);
4326 /* disable VLAN tag insert/strip */
4327 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4328 ctrl &= ~E1000_CTRL_VME;
4329 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4331 /* disable VLAN filtering */
4332 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4333 rctl &= ~E1000_RCTL_VFE;
4334 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4335 if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4336 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4337 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4341 e1000_irq_enable(adapter);
4345 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4347 struct e1000_adapter *adapter = netdev_priv(netdev);
4348 uint32_t vfta, index;
4350 if ((adapter->hw.mng_cookie.status &
4351 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4352 (vid == adapter->mng_vlan_id))
4354 /* add VID to filter table */
4355 index = (vid >> 5) & 0x7F;
4356 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4357 vfta |= (1 << (vid & 0x1F));
4358 e1000_write_vfta(&adapter->hw, index, vfta);
4362 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4364 struct e1000_adapter *adapter = netdev_priv(netdev);
4365 uint32_t vfta, index;
4367 e1000_irq_disable(adapter);
4370 adapter->vlgrp->vlan_devices[vid] = NULL;
4372 e1000_irq_enable(adapter);
4374 if ((adapter->hw.mng_cookie.status &
4375 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4376 (vid == adapter->mng_vlan_id)) {
4377 /* release control to f/w */
4378 e1000_release_hw_control(adapter);
4382 /* remove VID from filter table */
4383 index = (vid >> 5) & 0x7F;
4384 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4385 vfta &= ~(1 << (vid & 0x1F));
4386 e1000_write_vfta(&adapter->hw, index, vfta);
4390 e1000_restore_vlan(struct e1000_adapter *adapter)
4392 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4394 if (adapter->vlgrp) {
4396 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4397 if (!adapter->vlgrp->vlan_devices[vid])
4399 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4405 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4407 adapter->hw.autoneg = 0;
4409 /* Fiber NICs only allow 1000 gbps Full duplex */
4410 if ((adapter->hw.media_type == e1000_media_type_fiber) &&
4411 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4412 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4417 case SPEED_10 + DUPLEX_HALF:
4418 adapter->hw.forced_speed_duplex = e1000_10_half;
4420 case SPEED_10 + DUPLEX_FULL:
4421 adapter->hw.forced_speed_duplex = e1000_10_full;
4423 case SPEED_100 + DUPLEX_HALF:
4424 adapter->hw.forced_speed_duplex = e1000_100_half;
4426 case SPEED_100 + DUPLEX_FULL:
4427 adapter->hw.forced_speed_duplex = e1000_100_full;
4429 case SPEED_1000 + DUPLEX_FULL:
4430 adapter->hw.autoneg = 1;
4431 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4433 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4435 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4442 /* Save/restore 16 or 64 dwords of PCI config space depending on which
4443 * bus we're on (PCI(X) vs. PCI-E)
4445 #define PCIE_CONFIG_SPACE_LEN 256
4446 #define PCI_CONFIG_SPACE_LEN 64
4448 e1000_pci_save_state(struct e1000_adapter *adapter)
4450 struct pci_dev *dev = adapter->pdev;
4454 if (adapter->hw.mac_type >= e1000_82571)
4455 size = PCIE_CONFIG_SPACE_LEN;
4457 size = PCI_CONFIG_SPACE_LEN;
4459 WARN_ON(adapter->config_space != NULL);
4461 adapter->config_space = kmalloc(size, GFP_KERNEL);
4462 if (!adapter->config_space) {
4463 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4466 for (i = 0; i < (size / 4); i++)
4467 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4472 e1000_pci_restore_state(struct e1000_adapter *adapter)
4474 struct pci_dev *dev = adapter->pdev;
4478 if (adapter->config_space == NULL)
4481 if (adapter->hw.mac_type >= e1000_82571)
4482 size = PCIE_CONFIG_SPACE_LEN;
4484 size = PCI_CONFIG_SPACE_LEN;
4485 for (i = 0; i < (size / 4); i++)
4486 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4487 kfree(adapter->config_space);
4488 adapter->config_space = NULL;
4491 #endif /* CONFIG_PM */
4494 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4496 struct net_device *netdev = pci_get_drvdata(pdev);
4497 struct e1000_adapter *adapter = netdev_priv(netdev);
4498 uint32_t ctrl, ctrl_ext, rctl, manc, status;
4499 uint32_t wufc = adapter->wol;
4504 netif_device_detach(netdev);
4506 if (netif_running(netdev)) {
4507 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4508 e1000_down(adapter);
4512 /* Implement our own version of pci_save_state(pdev) because pci-
4513 * express adapters have 256-byte config spaces. */
4514 retval = e1000_pci_save_state(adapter);
4519 status = E1000_READ_REG(&adapter->hw, STATUS);
4520 if (status & E1000_STATUS_LU)
4521 wufc &= ~E1000_WUFC_LNKC;
4524 e1000_setup_rctl(adapter);
4525 e1000_set_multi(netdev);
4527 /* turn on all-multi mode if wake on multicast is enabled */
4528 if (adapter->wol & E1000_WUFC_MC) {
4529 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4530 rctl |= E1000_RCTL_MPE;
4531 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4534 if (adapter->hw.mac_type >= e1000_82540) {
4535 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4536 /* advertise wake from D3Cold */
4537 #define E1000_CTRL_ADVD3WUC 0x00100000
4538 /* phy power management enable */
4539 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4540 ctrl |= E1000_CTRL_ADVD3WUC |
4541 E1000_CTRL_EN_PHY_PWR_MGMT;
4542 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4545 if (adapter->hw.media_type == e1000_media_type_fiber ||
4546 adapter->hw.media_type == e1000_media_type_internal_serdes) {
4547 /* keep the laser running in D3 */
4548 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4549 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4550 E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4553 /* Allow time for pending master requests to run */
4554 e1000_disable_pciex_master(&adapter->hw);
4556 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4557 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4558 pci_enable_wake(pdev, PCI_D3hot, 1);
4559 pci_enable_wake(pdev, PCI_D3cold, 1);
4561 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4562 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4563 pci_enable_wake(pdev, PCI_D3hot, 0);
4564 pci_enable_wake(pdev, PCI_D3cold, 0);
4567 if (adapter->hw.mac_type >= e1000_82540 &&
4568 adapter->hw.media_type == e1000_media_type_copper) {
4569 manc = E1000_READ_REG(&adapter->hw, MANC);
4570 if (manc & E1000_MANC_SMBUS_EN) {
4571 manc |= E1000_MANC_ARP_EN;
4572 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4573 pci_enable_wake(pdev, PCI_D3hot, 1);
4574 pci_enable_wake(pdev, PCI_D3cold, 1);
4578 /* Release control of h/w to f/w. If f/w is AMT enabled, this
4579 * would have already happened in close and is redundant. */
4580 e1000_release_hw_control(adapter);
4582 pci_disable_device(pdev);
4584 pci_set_power_state(pdev, pci_choose_state(pdev, state));
4591 e1000_resume(struct pci_dev *pdev)
4593 struct net_device *netdev = pci_get_drvdata(pdev);
4594 struct e1000_adapter *adapter = netdev_priv(netdev);
4595 uint32_t manc, ret_val;
4597 pci_set_power_state(pdev, PCI_D0);
4598 e1000_pci_restore_state(adapter);
4599 ret_val = pci_enable_device(pdev);
4600 pci_set_master(pdev);
4602 pci_enable_wake(pdev, PCI_D3hot, 0);
4603 pci_enable_wake(pdev, PCI_D3cold, 0);
4605 e1000_reset(adapter);
4606 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4608 if (netif_running(netdev))
4611 netif_device_attach(netdev);
4613 if (adapter->hw.mac_type >= e1000_82540 &&
4614 adapter->hw.media_type == e1000_media_type_copper) {
4615 manc = E1000_READ_REG(&adapter->hw, MANC);
4616 manc &= ~(E1000_MANC_ARP_EN);
4617 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4620 /* If the controller is 82573 and f/w is AMT, do not set
4621 * DRV_LOAD until the interface is up. For all other cases,
4622 * let the f/w know that the h/w is now under the control
4624 if (adapter->hw.mac_type != e1000_82573 ||
4625 !e1000_check_mng_mode(&adapter->hw))
4626 e1000_get_hw_control(adapter);
4632 static void e1000_shutdown(struct pci_dev *pdev)
4634 e1000_suspend(pdev, PMSG_SUSPEND);
4637 #ifdef CONFIG_NET_POLL_CONTROLLER
4639 * Polling 'interrupt' - used by things like netconsole to send skbs
4640 * without having to re-enable interrupts. It's not called while
4641 * the interrupt routine is executing.
4644 e1000_netpoll(struct net_device *netdev)
4646 struct e1000_adapter *adapter = netdev_priv(netdev);
4647 disable_irq(adapter->pdev->irq);
4648 e1000_intr(adapter->pdev->irq, netdev, NULL);
4649 e1000_clean_tx_irq(adapter, adapter->tx_ring);
4650 #ifndef CONFIG_E1000_NAPI
4651 adapter->clean_rx(adapter, adapter->rx_ring);
4653 enable_irq(adapter->pdev->irq);
4658 * e1000_io_error_detected - called when PCI error is detected
4659 * @pdev: Pointer to PCI device
4660 * @state: The current pci conneection state
4662 * This function is called after a PCI bus error affecting
4663 * this device has been detected.
4665 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
4667 struct net_device *netdev = pci_get_drvdata(pdev);
4668 struct e1000_adapter *adapter = netdev->priv;
4670 netif_device_detach(netdev);
4672 if (netif_running(netdev))
4673 e1000_down(adapter);
4675 /* Request a slot slot reset. */
4676 return PCI_ERS_RESULT_NEED_RESET;
4680 * e1000_io_slot_reset - called after the pci bus has been reset.
4681 * @pdev: Pointer to PCI device
4683 * Restart the card from scratch, as if from a cold-boot. Implementation
4684 * resembles the first-half of the e1000_resume routine.
4686 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4688 struct net_device *netdev = pci_get_drvdata(pdev);
4689 struct e1000_adapter *adapter = netdev->priv;
4691 if (pci_enable_device(pdev)) {
4692 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4693 return PCI_ERS_RESULT_DISCONNECT;
4695 pci_set_master(pdev);
4697 pci_enable_wake(pdev, 3, 0);
4698 pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
4700 /* Perform card reset only on one instance of the card */
4701 if (PCI_FUNC (pdev->devfn) != 0)
4702 return PCI_ERS_RESULT_RECOVERED;
4704 e1000_reset(adapter);
4705 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4707 return PCI_ERS_RESULT_RECOVERED;
4711 * e1000_io_resume - called when traffic can start flowing again.
4712 * @pdev: Pointer to PCI device
4714 * This callback is called when the error recovery driver tells us that
4715 * its OK to resume normal operation. Implementation resembles the
4716 * second-half of the e1000_resume routine.
4718 static void e1000_io_resume(struct pci_dev *pdev)
4720 struct net_device *netdev = pci_get_drvdata(pdev);
4721 struct e1000_adapter *adapter = netdev->priv;
4722 uint32_t manc, swsm;
4724 if (netif_running(netdev)) {
4725 if (e1000_up(adapter)) {
4726 printk("e1000: can't bring device back up after reset\n");
4731 netif_device_attach(netdev);
4733 if (adapter->hw.mac_type >= e1000_82540 &&
4734 adapter->hw.media_type == e1000_media_type_copper) {
4735 manc = E1000_READ_REG(&adapter->hw, MANC);
4736 manc &= ~(E1000_MANC_ARP_EN);
4737 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4740 switch (adapter->hw.mac_type) {
4742 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4743 E1000_WRITE_REG(&adapter->hw, SWSM,
4744 swsm | E1000_SWSM_DRV_LOAD);
4750 if (netif_running(netdev))
4751 mod_timer(&adapter->watchdog_timer, jiffies);