1 /*******************************************************************************
4 Copyright(c) 1999 - 2005 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 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
33 * o Accepted ethtool cleanup patch from Stephen Hemminger
35 * o applied Anton's patch to resolve tx hang in hardware
36 * o Applied Andrew Mortons patch - e1000 stops working after resume
39 char e1000_driver_name[] = "e1000";
40 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
41 #ifndef CONFIG_E1000_NAPI
44 #define DRIVERNAPI "-NAPI"
46 #define DRV_VERSION "6.3.9-k2"DRIVERNAPI
47 char e1000_driver_version[] = DRV_VERSION;
48 static char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
50 /* e1000_pci_tbl - PCI Device ID Table
52 * Last entry must be all 0s
55 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
57 static struct pci_device_id e1000_pci_tbl[] = {
58 INTEL_E1000_ETHERNET_DEVICE(0x1000),
59 INTEL_E1000_ETHERNET_DEVICE(0x1001),
60 INTEL_E1000_ETHERNET_DEVICE(0x1004),
61 INTEL_E1000_ETHERNET_DEVICE(0x1008),
62 INTEL_E1000_ETHERNET_DEVICE(0x1009),
63 INTEL_E1000_ETHERNET_DEVICE(0x100C),
64 INTEL_E1000_ETHERNET_DEVICE(0x100D),
65 INTEL_E1000_ETHERNET_DEVICE(0x100E),
66 INTEL_E1000_ETHERNET_DEVICE(0x100F),
67 INTEL_E1000_ETHERNET_DEVICE(0x1010),
68 INTEL_E1000_ETHERNET_DEVICE(0x1011),
69 INTEL_E1000_ETHERNET_DEVICE(0x1012),
70 INTEL_E1000_ETHERNET_DEVICE(0x1013),
71 INTEL_E1000_ETHERNET_DEVICE(0x1014),
72 INTEL_E1000_ETHERNET_DEVICE(0x1015),
73 INTEL_E1000_ETHERNET_DEVICE(0x1016),
74 INTEL_E1000_ETHERNET_DEVICE(0x1017),
75 INTEL_E1000_ETHERNET_DEVICE(0x1018),
76 INTEL_E1000_ETHERNET_DEVICE(0x1019),
77 INTEL_E1000_ETHERNET_DEVICE(0x101A),
78 INTEL_E1000_ETHERNET_DEVICE(0x101D),
79 INTEL_E1000_ETHERNET_DEVICE(0x101E),
80 INTEL_E1000_ETHERNET_DEVICE(0x1026),
81 INTEL_E1000_ETHERNET_DEVICE(0x1027),
82 INTEL_E1000_ETHERNET_DEVICE(0x1028),
83 INTEL_E1000_ETHERNET_DEVICE(0x105E),
84 INTEL_E1000_ETHERNET_DEVICE(0x105F),
85 INTEL_E1000_ETHERNET_DEVICE(0x1060),
86 INTEL_E1000_ETHERNET_DEVICE(0x1075),
87 INTEL_E1000_ETHERNET_DEVICE(0x1076),
88 INTEL_E1000_ETHERNET_DEVICE(0x1077),
89 INTEL_E1000_ETHERNET_DEVICE(0x1078),
90 INTEL_E1000_ETHERNET_DEVICE(0x1079),
91 INTEL_E1000_ETHERNET_DEVICE(0x107A),
92 INTEL_E1000_ETHERNET_DEVICE(0x107B),
93 INTEL_E1000_ETHERNET_DEVICE(0x107C),
94 INTEL_E1000_ETHERNET_DEVICE(0x107D),
95 INTEL_E1000_ETHERNET_DEVICE(0x107E),
96 INTEL_E1000_ETHERNET_DEVICE(0x107F),
97 INTEL_E1000_ETHERNET_DEVICE(0x108A),
98 INTEL_E1000_ETHERNET_DEVICE(0x108B),
99 INTEL_E1000_ETHERNET_DEVICE(0x108C),
100 INTEL_E1000_ETHERNET_DEVICE(0x1099),
101 INTEL_E1000_ETHERNET_DEVICE(0x109A),
102 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
103 /* required last entry */
107 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
109 int e1000_up(struct e1000_adapter *adapter);
110 void e1000_down(struct e1000_adapter *adapter);
111 void e1000_reset(struct e1000_adapter *adapter);
112 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
113 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
114 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
115 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
116 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
117 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
118 struct e1000_tx_ring *txdr);
119 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
120 struct e1000_rx_ring *rxdr);
121 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
122 struct e1000_tx_ring *tx_ring);
123 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
124 struct e1000_rx_ring *rx_ring);
125 void e1000_update_stats(struct e1000_adapter *adapter);
127 /* Local Function Prototypes */
129 static int e1000_init_module(void);
130 static void e1000_exit_module(void);
131 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
132 static void __devexit e1000_remove(struct pci_dev *pdev);
133 static int e1000_alloc_queues(struct e1000_adapter *adapter);
134 #ifdef CONFIG_E1000_MQ
135 static void e1000_setup_queue_mapping(struct e1000_adapter *adapter);
137 static int e1000_sw_init(struct e1000_adapter *adapter);
138 static int e1000_open(struct net_device *netdev);
139 static int e1000_close(struct net_device *netdev);
140 static void e1000_configure_tx(struct e1000_adapter *adapter);
141 static void e1000_configure_rx(struct e1000_adapter *adapter);
142 static void e1000_setup_rctl(struct e1000_adapter *adapter);
143 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
144 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
145 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
146 struct e1000_tx_ring *tx_ring);
147 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
148 struct e1000_rx_ring *rx_ring);
149 static void e1000_set_multi(struct net_device *netdev);
150 static void e1000_update_phy_info(unsigned long data);
151 static void e1000_watchdog(unsigned long data);
152 static void e1000_watchdog_task(struct e1000_adapter *adapter);
153 static void e1000_82547_tx_fifo_stall(unsigned long data);
154 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
155 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
156 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
157 static int e1000_set_mac(struct net_device *netdev, void *p);
158 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
159 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
160 struct e1000_tx_ring *tx_ring);
161 #ifdef CONFIG_E1000_NAPI
162 static int e1000_clean(struct net_device *poll_dev, int *budget);
163 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
164 struct e1000_rx_ring *rx_ring,
165 int *work_done, int work_to_do);
166 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
167 struct e1000_rx_ring *rx_ring,
168 int *work_done, int work_to_do);
170 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
171 struct e1000_rx_ring *rx_ring);
172 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
173 struct e1000_rx_ring *rx_ring);
175 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
176 struct e1000_rx_ring *rx_ring,
178 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
179 struct e1000_rx_ring *rx_ring,
181 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
182 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
184 void e1000_set_ethtool_ops(struct net_device *netdev);
185 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
186 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
187 static void e1000_tx_timeout(struct net_device *dev);
188 static void e1000_tx_timeout_task(struct net_device *dev);
189 static void e1000_smartspeed(struct e1000_adapter *adapter);
190 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
191 struct sk_buff *skb);
193 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
194 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
195 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
196 static void e1000_restore_vlan(struct e1000_adapter *adapter);
199 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
200 static int e1000_resume(struct pci_dev *pdev);
203 #ifdef CONFIG_NET_POLL_CONTROLLER
204 /* for netdump / net console */
205 static void e1000_netpoll (struct net_device *netdev);
208 #ifdef CONFIG_E1000_MQ
209 /* for multiple Rx queues */
210 void e1000_rx_schedule(void *data);
213 /* Exported from other modules */
215 extern void e1000_check_options(struct e1000_adapter *adapter);
217 static struct pci_driver e1000_driver = {
218 .name = e1000_driver_name,
219 .id_table = e1000_pci_tbl,
220 .probe = e1000_probe,
221 .remove = __devexit_p(e1000_remove),
222 /* Power Managment Hooks */
224 .suspend = e1000_suspend,
225 .resume = e1000_resume
229 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
230 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
231 MODULE_LICENSE("GPL");
232 MODULE_VERSION(DRV_VERSION);
234 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
235 module_param(debug, int, 0);
236 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
239 * e1000_init_module - Driver Registration Routine
241 * e1000_init_module is the first routine called when the driver is
242 * loaded. All it does is register with the PCI subsystem.
246 e1000_init_module(void)
249 printk(KERN_INFO "%s - version %s\n",
250 e1000_driver_string, e1000_driver_version);
252 printk(KERN_INFO "%s\n", e1000_copyright);
254 ret = pci_module_init(&e1000_driver);
259 module_init(e1000_init_module);
262 * e1000_exit_module - Driver Exit Cleanup Routine
264 * e1000_exit_module is called just before the driver is removed
269 e1000_exit_module(void)
271 pci_unregister_driver(&e1000_driver);
274 module_exit(e1000_exit_module);
277 * e1000_irq_disable - Mask off interrupt generation on the NIC
278 * @adapter: board private structure
282 e1000_irq_disable(struct e1000_adapter *adapter)
284 atomic_inc(&adapter->irq_sem);
285 E1000_WRITE_REG(&adapter->hw, IMC, ~0);
286 E1000_WRITE_FLUSH(&adapter->hw);
287 synchronize_irq(adapter->pdev->irq);
291 * e1000_irq_enable - Enable default interrupt generation settings
292 * @adapter: board private structure
296 e1000_irq_enable(struct e1000_adapter *adapter)
298 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
299 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
300 E1000_WRITE_FLUSH(&adapter->hw);
305 e1000_update_mng_vlan(struct e1000_adapter *adapter)
307 struct net_device *netdev = adapter->netdev;
308 uint16_t vid = adapter->hw.mng_cookie.vlan_id;
309 uint16_t old_vid = adapter->mng_vlan_id;
310 if (adapter->vlgrp) {
311 if (!adapter->vlgrp->vlan_devices[vid]) {
312 if (adapter->hw.mng_cookie.status &
313 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
314 e1000_vlan_rx_add_vid(netdev, vid);
315 adapter->mng_vlan_id = vid;
317 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
319 if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
321 !adapter->vlgrp->vlan_devices[old_vid])
322 e1000_vlan_rx_kill_vid(netdev, old_vid);
328 * e1000_release_hw_control - release control of the h/w to f/w
329 * @adapter: address of board private structure
331 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
332 * For ASF and Pass Through versions of f/w this means that the
333 * driver is no longer loaded. For AMT version (only with 82573) i
334 * of the f/w this means that the netowrk i/f is closed.
339 e1000_release_hw_control(struct e1000_adapter *adapter)
344 /* Let firmware taken over control of h/w */
345 switch (adapter->hw.mac_type) {
348 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
349 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
350 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
353 swsm = E1000_READ_REG(&adapter->hw, SWSM);
354 E1000_WRITE_REG(&adapter->hw, SWSM,
355 swsm & ~E1000_SWSM_DRV_LOAD);
362 * e1000_get_hw_control - get control of the h/w from f/w
363 * @adapter: address of board private structure
365 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
366 * For ASF and Pass Through versions of f/w this means that
367 * the driver is loaded. For AMT version (only with 82573)
368 * of the f/w this means that the netowrk i/f is open.
373 e1000_get_hw_control(struct e1000_adapter *adapter)
377 /* Let firmware know the driver has taken over */
378 switch (adapter->hw.mac_type) {
381 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
382 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
383 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
386 swsm = E1000_READ_REG(&adapter->hw, SWSM);
387 E1000_WRITE_REG(&adapter->hw, SWSM,
388 swsm | E1000_SWSM_DRV_LOAD);
396 e1000_up(struct e1000_adapter *adapter)
398 struct net_device *netdev = adapter->netdev;
401 /* hardware has been reset, we need to reload some things */
403 /* Reset the PHY if it was previously powered down */
404 if (adapter->hw.media_type == e1000_media_type_copper) {
406 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
407 if (mii_reg & MII_CR_POWER_DOWN)
408 e1000_phy_reset(&adapter->hw);
411 e1000_set_multi(netdev);
413 e1000_restore_vlan(adapter);
415 e1000_configure_tx(adapter);
416 e1000_setup_rctl(adapter);
417 e1000_configure_rx(adapter);
418 /* call E1000_DESC_UNUSED which always leaves
419 * at least 1 descriptor unused to make sure
420 * next_to_use != next_to_clean */
421 for (i = 0; i < adapter->num_rx_queues; i++) {
422 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
423 adapter->alloc_rx_buf(adapter, ring,
424 E1000_DESC_UNUSED(ring));
427 #ifdef CONFIG_PCI_MSI
428 if (adapter->hw.mac_type > e1000_82547_rev_2) {
429 adapter->have_msi = TRUE;
430 if ((err = pci_enable_msi(adapter->pdev))) {
432 "Unable to allocate MSI interrupt Error: %d\n", err);
433 adapter->have_msi = FALSE;
437 if ((err = request_irq(adapter->pdev->irq, &e1000_intr,
438 SA_SHIRQ | SA_SAMPLE_RANDOM,
439 netdev->name, netdev))) {
441 "Unable to allocate interrupt Error: %d\n", err);
445 #ifdef CONFIG_E1000_MQ
446 e1000_setup_queue_mapping(adapter);
449 adapter->tx_queue_len = netdev->tx_queue_len;
451 mod_timer(&adapter->watchdog_timer, jiffies);
453 #ifdef CONFIG_E1000_NAPI
454 netif_poll_enable(netdev);
456 e1000_irq_enable(adapter);
462 e1000_down(struct e1000_adapter *adapter)
464 struct net_device *netdev = adapter->netdev;
465 boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
466 e1000_check_mng_mode(&adapter->hw);
468 e1000_irq_disable(adapter);
469 #ifdef CONFIG_E1000_MQ
470 while (atomic_read(&adapter->rx_sched_call_data.count) != 0);
472 free_irq(adapter->pdev->irq, netdev);
473 #ifdef CONFIG_PCI_MSI
474 if (adapter->hw.mac_type > e1000_82547_rev_2 &&
475 adapter->have_msi == TRUE)
476 pci_disable_msi(adapter->pdev);
478 del_timer_sync(&adapter->tx_fifo_stall_timer);
479 del_timer_sync(&adapter->watchdog_timer);
480 del_timer_sync(&adapter->phy_info_timer);
482 #ifdef CONFIG_E1000_NAPI
483 netif_poll_disable(netdev);
485 netdev->tx_queue_len = adapter->tx_queue_len;
486 adapter->link_speed = 0;
487 adapter->link_duplex = 0;
488 netif_carrier_off(netdev);
489 netif_stop_queue(netdev);
491 e1000_reset(adapter);
492 e1000_clean_all_tx_rings(adapter);
493 e1000_clean_all_rx_rings(adapter);
495 /* Power down the PHY so no link is implied when interface is down *
496 * The PHY cannot be powered down if any of the following is TRUE *
499 * (c) SoL/IDER session is active */
500 if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
501 adapter->hw.media_type == e1000_media_type_copper &&
502 !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
504 !e1000_check_phy_reset_block(&adapter->hw)) {
506 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
507 mii_reg |= MII_CR_POWER_DOWN;
508 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
514 e1000_reset(struct e1000_adapter *adapter)
517 uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
519 /* Repartition Pba for greater than 9k mtu
520 * To take effect CTRL.RST is required.
523 switch (adapter->hw.mac_type) {
525 case e1000_82547_rev_2:
540 if ((adapter->hw.mac_type != e1000_82573) &&
541 (adapter->netdev->mtu > E1000_RXBUFFER_8192))
542 pba -= 8; /* allocate more FIFO for Tx */
545 if (adapter->hw.mac_type == e1000_82547) {
546 adapter->tx_fifo_head = 0;
547 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
548 adapter->tx_fifo_size =
549 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
550 atomic_set(&adapter->tx_fifo_stall, 0);
553 E1000_WRITE_REG(&adapter->hw, PBA, pba);
555 /* flow control settings */
556 /* Set the FC high water mark to 90% of the FIFO size.
557 * Required to clear last 3 LSB */
558 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
560 adapter->hw.fc_high_water = fc_high_water_mark;
561 adapter->hw.fc_low_water = fc_high_water_mark - 8;
562 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
563 adapter->hw.fc_send_xon = 1;
564 adapter->hw.fc = adapter->hw.original_fc;
566 /* Allow time for pending master requests to run */
567 e1000_reset_hw(&adapter->hw);
568 if (adapter->hw.mac_type >= e1000_82544)
569 E1000_WRITE_REG(&adapter->hw, WUC, 0);
570 if (e1000_init_hw(&adapter->hw))
571 DPRINTK(PROBE, ERR, "Hardware Error\n");
572 e1000_update_mng_vlan(adapter);
573 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
574 E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
576 e1000_reset_adaptive(&adapter->hw);
577 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
578 if (adapter->en_mng_pt) {
579 manc = E1000_READ_REG(&adapter->hw, MANC);
580 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
581 E1000_WRITE_REG(&adapter->hw, MANC, manc);
586 * e1000_probe - Device Initialization Routine
587 * @pdev: PCI device information struct
588 * @ent: entry in e1000_pci_tbl
590 * Returns 0 on success, negative on failure
592 * e1000_probe initializes an adapter identified by a pci_dev structure.
593 * The OS initialization, configuring of the adapter private structure,
594 * and a hardware reset occur.
598 e1000_probe(struct pci_dev *pdev,
599 const struct pci_device_id *ent)
601 struct net_device *netdev;
602 struct e1000_adapter *adapter;
603 unsigned long mmio_start, mmio_len;
605 static int cards_found = 0;
606 int i, err, pci_using_dac;
607 uint16_t eeprom_data;
608 uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
609 if ((err = pci_enable_device(pdev)))
612 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
615 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
616 E1000_ERR("No usable DMA configuration, aborting\n");
622 if ((err = pci_request_regions(pdev, e1000_driver_name)))
625 pci_set_master(pdev);
627 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
630 goto err_alloc_etherdev;
633 SET_MODULE_OWNER(netdev);
634 SET_NETDEV_DEV(netdev, &pdev->dev);
636 pci_set_drvdata(pdev, netdev);
637 adapter = netdev_priv(netdev);
638 adapter->netdev = netdev;
639 adapter->pdev = pdev;
640 adapter->hw.back = adapter;
641 adapter->msg_enable = (1 << debug) - 1;
643 mmio_start = pci_resource_start(pdev, BAR_0);
644 mmio_len = pci_resource_len(pdev, BAR_0);
646 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
647 if (!adapter->hw.hw_addr) {
652 for (i = BAR_1; i <= BAR_5; i++) {
653 if (pci_resource_len(pdev, i) == 0)
655 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
656 adapter->hw.io_base = pci_resource_start(pdev, i);
661 netdev->open = &e1000_open;
662 netdev->stop = &e1000_close;
663 netdev->hard_start_xmit = &e1000_xmit_frame;
664 netdev->get_stats = &e1000_get_stats;
665 netdev->set_multicast_list = &e1000_set_multi;
666 netdev->set_mac_address = &e1000_set_mac;
667 netdev->change_mtu = &e1000_change_mtu;
668 netdev->do_ioctl = &e1000_ioctl;
669 e1000_set_ethtool_ops(netdev);
670 netdev->tx_timeout = &e1000_tx_timeout;
671 netdev->watchdog_timeo = 5 * HZ;
672 #ifdef CONFIG_E1000_NAPI
673 netdev->poll = &e1000_clean;
676 netdev->vlan_rx_register = e1000_vlan_rx_register;
677 netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
678 netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
679 #ifdef CONFIG_NET_POLL_CONTROLLER
680 netdev->poll_controller = e1000_netpoll;
682 strcpy(netdev->name, pci_name(pdev));
684 netdev->mem_start = mmio_start;
685 netdev->mem_end = mmio_start + mmio_len;
686 netdev->base_addr = adapter->hw.io_base;
688 adapter->bd_number = cards_found;
690 /* setup the private structure */
692 if ((err = e1000_sw_init(adapter)))
695 if ((err = e1000_check_phy_reset_block(&adapter->hw)))
696 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
698 if (adapter->hw.mac_type >= e1000_82543) {
699 netdev->features = NETIF_F_SG |
703 NETIF_F_HW_VLAN_FILTER;
707 if ((adapter->hw.mac_type >= e1000_82544) &&
708 (adapter->hw.mac_type != e1000_82547))
709 netdev->features |= NETIF_F_TSO;
711 #ifdef NETIF_F_TSO_IPV6
712 if (adapter->hw.mac_type > e1000_82547_rev_2)
713 netdev->features |= NETIF_F_TSO_IPV6;
717 netdev->features |= NETIF_F_HIGHDMA;
719 /* hard_start_xmit is safe against parallel locking */
720 netdev->features |= NETIF_F_LLTX;
722 adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
724 /* before reading the EEPROM, reset the controller to
725 * put the device in a known good starting state */
727 e1000_reset_hw(&adapter->hw);
729 /* make sure the EEPROM is good */
731 if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
732 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
737 /* copy the MAC address out of the EEPROM */
739 if (e1000_read_mac_addr(&adapter->hw))
740 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
741 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
742 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
744 if (!is_valid_ether_addr(netdev->perm_addr)) {
745 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
750 e1000_read_part_num(&adapter->hw, &(adapter->part_num));
752 e1000_get_bus_info(&adapter->hw);
754 init_timer(&adapter->tx_fifo_stall_timer);
755 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
756 adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
758 init_timer(&adapter->watchdog_timer);
759 adapter->watchdog_timer.function = &e1000_watchdog;
760 adapter->watchdog_timer.data = (unsigned long) adapter;
762 INIT_WORK(&adapter->watchdog_task,
763 (void (*)(void *))e1000_watchdog_task, adapter);
765 init_timer(&adapter->phy_info_timer);
766 adapter->phy_info_timer.function = &e1000_update_phy_info;
767 adapter->phy_info_timer.data = (unsigned long) adapter;
769 INIT_WORK(&adapter->tx_timeout_task,
770 (void (*)(void *))e1000_tx_timeout_task, netdev);
772 /* we're going to reset, so assume we have no link for now */
774 netif_carrier_off(netdev);
775 netif_stop_queue(netdev);
777 e1000_check_options(adapter);
779 /* Initial Wake on LAN setting
780 * If APM wake is enabled in the EEPROM,
781 * enable the ACPI Magic Packet filter
784 switch (adapter->hw.mac_type) {
785 case e1000_82542_rev2_0:
786 case e1000_82542_rev2_1:
790 e1000_read_eeprom(&adapter->hw,
791 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
792 eeprom_apme_mask = E1000_EEPROM_82544_APM;
795 case e1000_82546_rev_3:
797 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
798 e1000_read_eeprom(&adapter->hw,
799 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
804 e1000_read_eeprom(&adapter->hw,
805 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
808 if (eeprom_data & eeprom_apme_mask)
809 adapter->wol |= E1000_WUFC_MAG;
811 /* print bus type/speed/width info */
813 struct e1000_hw *hw = &adapter->hw;
814 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
815 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
816 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
817 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
818 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
819 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
820 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
821 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
822 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
823 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
824 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
828 for (i = 0; i < 6; i++)
829 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
831 /* reset the hardware with the new settings */
832 e1000_reset(adapter);
834 /* If the controller is 82573 and f/w is AMT, do not set
835 * DRV_LOAD until the interface is up. For all other cases,
836 * let the f/w know that the h/w is now under the control
838 if (adapter->hw.mac_type != e1000_82573 ||
839 !e1000_check_mng_mode(&adapter->hw))
840 e1000_get_hw_control(adapter);
842 strcpy(netdev->name, "eth%d");
843 if ((err = register_netdev(netdev)))
846 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
854 iounmap(adapter->hw.hw_addr);
858 pci_release_regions(pdev);
863 * e1000_remove - Device Removal Routine
864 * @pdev: PCI device information struct
866 * e1000_remove is called by the PCI subsystem to alert the driver
867 * that it should release a PCI device. The could be caused by a
868 * Hot-Plug event, or because the driver is going to be removed from
872 static void __devexit
873 e1000_remove(struct pci_dev *pdev)
875 struct net_device *netdev = pci_get_drvdata(pdev);
876 struct e1000_adapter *adapter = netdev_priv(netdev);
878 #ifdef CONFIG_E1000_NAPI
882 flush_scheduled_work();
884 if (adapter->hw.mac_type >= e1000_82540 &&
885 adapter->hw.media_type == e1000_media_type_copper) {
886 manc = E1000_READ_REG(&adapter->hw, MANC);
887 if (manc & E1000_MANC_SMBUS_EN) {
888 manc |= E1000_MANC_ARP_EN;
889 E1000_WRITE_REG(&adapter->hw, MANC, manc);
893 /* Release control of h/w to f/w. If f/w is AMT enabled, this
894 * would have already happened in close and is redundant. */
895 e1000_release_hw_control(adapter);
897 unregister_netdev(netdev);
898 #ifdef CONFIG_E1000_NAPI
899 for (i = 0; i < adapter->num_rx_queues; i++)
900 __dev_put(&adapter->polling_netdev[i]);
903 if (!e1000_check_phy_reset_block(&adapter->hw))
904 e1000_phy_hw_reset(&adapter->hw);
906 kfree(adapter->tx_ring);
907 kfree(adapter->rx_ring);
908 #ifdef CONFIG_E1000_NAPI
909 kfree(adapter->polling_netdev);
912 iounmap(adapter->hw.hw_addr);
913 pci_release_regions(pdev);
915 #ifdef CONFIG_E1000_MQ
916 free_percpu(adapter->cpu_netdev);
917 free_percpu(adapter->cpu_tx_ring);
921 pci_disable_device(pdev);
925 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
926 * @adapter: board private structure to initialize
928 * e1000_sw_init initializes the Adapter private data structure.
929 * Fields are initialized based on PCI device information and
930 * OS network device settings (MTU size).
934 e1000_sw_init(struct e1000_adapter *adapter)
936 struct e1000_hw *hw = &adapter->hw;
937 struct net_device *netdev = adapter->netdev;
938 struct pci_dev *pdev = adapter->pdev;
939 #ifdef CONFIG_E1000_NAPI
943 /* PCI config space info */
945 hw->vendor_id = pdev->vendor;
946 hw->device_id = pdev->device;
947 hw->subsystem_vendor_id = pdev->subsystem_vendor;
948 hw->subsystem_id = pdev->subsystem_device;
950 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
952 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
954 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
955 adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
956 hw->max_frame_size = netdev->mtu +
957 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
958 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
960 /* identify the MAC */
962 if (e1000_set_mac_type(hw)) {
963 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
967 /* initialize eeprom parameters */
969 if (e1000_init_eeprom_params(hw)) {
970 E1000_ERR("EEPROM initialization failed\n");
974 switch (hw->mac_type) {
979 case e1000_82541_rev_2:
980 case e1000_82547_rev_2:
981 hw->phy_init_script = 1;
985 e1000_set_media_type(hw);
987 hw->wait_autoneg_complete = FALSE;
988 hw->tbi_compatibility_en = TRUE;
989 hw->adaptive_ifs = TRUE;
993 if (hw->media_type == e1000_media_type_copper) {
994 hw->mdix = AUTO_ALL_MODES;
995 hw->disable_polarity_correction = FALSE;
996 hw->master_slave = E1000_MASTER_SLAVE;
999 #ifdef CONFIG_E1000_MQ
1000 /* Number of supported queues */
1001 switch (hw->mac_type) {
1004 /* These controllers support 2 tx queues, but with a single
1005 * qdisc implementation, multiple tx queues aren't quite as
1006 * interesting. If we can find a logical way of mapping
1007 * flows to a queue, then perhaps we can up the num_tx_queue
1008 * count back to its default. Until then, we run the risk of
1009 * terrible performance due to SACK overload. */
1010 adapter->num_tx_queues = 1;
1011 adapter->num_rx_queues = 2;
1014 adapter->num_tx_queues = 1;
1015 adapter->num_rx_queues = 1;
1018 adapter->num_rx_queues = min(adapter->num_rx_queues, num_online_cpus());
1019 adapter->num_tx_queues = min(adapter->num_tx_queues, num_online_cpus());
1020 DPRINTK(DRV, INFO, "Multiqueue Enabled: Rx Queue count = %u %s\n",
1021 adapter->num_rx_queues,
1022 ((adapter->num_rx_queues == 1)
1023 ? ((num_online_cpus() > 1)
1024 ? "(due to unsupported feature in current adapter)"
1025 : "(due to unsupported system configuration)")
1027 DPRINTK(DRV, INFO, "Multiqueue Enabled: Tx Queue count = %u\n",
1028 adapter->num_tx_queues);
1030 adapter->num_tx_queues = 1;
1031 adapter->num_rx_queues = 1;
1034 if (e1000_alloc_queues(adapter)) {
1035 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1039 #ifdef CONFIG_E1000_NAPI
1040 for (i = 0; i < adapter->num_rx_queues; i++) {
1041 adapter->polling_netdev[i].priv = adapter;
1042 adapter->polling_netdev[i].poll = &e1000_clean;
1043 adapter->polling_netdev[i].weight = 64;
1044 dev_hold(&adapter->polling_netdev[i]);
1045 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1047 spin_lock_init(&adapter->tx_queue_lock);
1050 atomic_set(&adapter->irq_sem, 1);
1051 spin_lock_init(&adapter->stats_lock);
1057 * e1000_alloc_queues - Allocate memory for all rings
1058 * @adapter: board private structure to initialize
1060 * We allocate one ring per queue at run-time since we don't know the
1061 * number of queues at compile-time. The polling_netdev array is
1062 * intended for Multiqueue, but should work fine with a single queue.
1065 static int __devinit
1066 e1000_alloc_queues(struct e1000_adapter *adapter)
1070 size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1071 adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1072 if (!adapter->tx_ring)
1074 memset(adapter->tx_ring, 0, size);
1076 size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1077 adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1078 if (!adapter->rx_ring) {
1079 kfree(adapter->tx_ring);
1082 memset(adapter->rx_ring, 0, size);
1084 #ifdef CONFIG_E1000_NAPI
1085 size = sizeof(struct net_device) * adapter->num_rx_queues;
1086 adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1087 if (!adapter->polling_netdev) {
1088 kfree(adapter->tx_ring);
1089 kfree(adapter->rx_ring);
1092 memset(adapter->polling_netdev, 0, size);
1095 #ifdef CONFIG_E1000_MQ
1096 adapter->rx_sched_call_data.func = e1000_rx_schedule;
1097 adapter->rx_sched_call_data.info = adapter->netdev;
1099 adapter->cpu_netdev = alloc_percpu(struct net_device *);
1100 adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
1103 return E1000_SUCCESS;
1106 #ifdef CONFIG_E1000_MQ
1107 static void __devinit
1108 e1000_setup_queue_mapping(struct e1000_adapter *adapter)
1112 adapter->rx_sched_call_data.func = e1000_rx_schedule;
1113 adapter->rx_sched_call_data.info = adapter->netdev;
1114 cpus_clear(adapter->rx_sched_call_data.cpumask);
1116 adapter->cpu_netdev = alloc_percpu(struct net_device *);
1117 adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
1121 for_each_online_cpu(cpu) {
1122 *per_cpu_ptr(adapter->cpu_tx_ring, cpu) = &adapter->tx_ring[i % adapter->num_tx_queues];
1123 /* This is incomplete because we'd like to assign separate
1124 * physical cpus to these netdev polling structures and
1125 * avoid saturating a subset of cpus.
1127 if (i < adapter->num_rx_queues) {
1128 *per_cpu_ptr(adapter->cpu_netdev, cpu) = &adapter->polling_netdev[i];
1129 adapter->rx_ring[i].cpu = cpu;
1130 cpu_set(cpu, adapter->cpumask);
1132 *per_cpu_ptr(adapter->cpu_netdev, cpu) = NULL;
1136 unlock_cpu_hotplug();
1141 * e1000_open - Called when a network interface is made active
1142 * @netdev: network interface device structure
1144 * Returns 0 on success, negative value on failure
1146 * The open entry point is called when a network interface is made
1147 * active by the system (IFF_UP). At this point all resources needed
1148 * for transmit and receive operations are allocated, the interrupt
1149 * handler is registered with the OS, the watchdog timer is started,
1150 * and the stack is notified that the interface is ready.
1154 e1000_open(struct net_device *netdev)
1156 struct e1000_adapter *adapter = netdev_priv(netdev);
1159 /* allocate transmit descriptors */
1161 if ((err = e1000_setup_all_tx_resources(adapter)))
1164 /* allocate receive descriptors */
1166 if ((err = e1000_setup_all_rx_resources(adapter)))
1169 if ((err = e1000_up(adapter)))
1171 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1172 if ((adapter->hw.mng_cookie.status &
1173 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1174 e1000_update_mng_vlan(adapter);
1177 /* If AMT is enabled, let the firmware know that the network
1178 * interface is now open */
1179 if (adapter->hw.mac_type == e1000_82573 &&
1180 e1000_check_mng_mode(&adapter->hw))
1181 e1000_get_hw_control(adapter);
1183 return E1000_SUCCESS;
1186 e1000_free_all_rx_resources(adapter);
1188 e1000_free_all_tx_resources(adapter);
1190 e1000_reset(adapter);
1196 * e1000_close - Disables a network interface
1197 * @netdev: network interface device structure
1199 * Returns 0, this is not allowed to fail
1201 * The close entry point is called when an interface is de-activated
1202 * by the OS. The hardware is still under the drivers control, but
1203 * needs to be disabled. A global MAC reset is issued to stop the
1204 * hardware, and all transmit and receive resources are freed.
1208 e1000_close(struct net_device *netdev)
1210 struct e1000_adapter *adapter = netdev_priv(netdev);
1212 e1000_down(adapter);
1214 e1000_free_all_tx_resources(adapter);
1215 e1000_free_all_rx_resources(adapter);
1217 if ((adapter->hw.mng_cookie.status &
1218 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1219 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1222 /* If AMT is enabled, let the firmware know that the network
1223 * interface is now closed */
1224 if (adapter->hw.mac_type == e1000_82573 &&
1225 e1000_check_mng_mode(&adapter->hw))
1226 e1000_release_hw_control(adapter);
1232 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1233 * @adapter: address of board private structure
1234 * @start: address of beginning of memory
1235 * @len: length of memory
1237 static inline boolean_t
1238 e1000_check_64k_bound(struct e1000_adapter *adapter,
1239 void *start, unsigned long len)
1241 unsigned long begin = (unsigned long) start;
1242 unsigned long end = begin + len;
1244 /* First rev 82545 and 82546 need to not allow any memory
1245 * write location to cross 64k boundary due to errata 23 */
1246 if (adapter->hw.mac_type == e1000_82545 ||
1247 adapter->hw.mac_type == e1000_82546) {
1248 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1255 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1256 * @adapter: board private structure
1257 * @txdr: tx descriptor ring (for a specific queue) to setup
1259 * Return 0 on success, negative on failure
1263 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1264 struct e1000_tx_ring *txdr)
1266 struct pci_dev *pdev = adapter->pdev;
1269 size = sizeof(struct e1000_buffer) * txdr->count;
1271 txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1272 if (!txdr->buffer_info) {
1274 "Unable to allocate memory for the transmit descriptor ring\n");
1277 memset(txdr->buffer_info, 0, size);
1279 /* round up to nearest 4K */
1281 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1282 E1000_ROUNDUP(txdr->size, 4096);
1284 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1287 vfree(txdr->buffer_info);
1289 "Unable to allocate memory for the transmit descriptor ring\n");
1293 /* Fix for errata 23, can't cross 64kB boundary */
1294 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1295 void *olddesc = txdr->desc;
1296 dma_addr_t olddma = txdr->dma;
1297 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1298 "at %p\n", txdr->size, txdr->desc);
1299 /* Try again, without freeing the previous */
1300 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1301 /* Failed allocation, critical failure */
1303 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1304 goto setup_tx_desc_die;
1307 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1309 pci_free_consistent(pdev, txdr->size, txdr->desc,
1311 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1313 "Unable to allocate aligned memory "
1314 "for the transmit descriptor ring\n");
1315 vfree(txdr->buffer_info);
1318 /* Free old allocation, new allocation was successful */
1319 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1322 memset(txdr->desc, 0, txdr->size);
1324 txdr->next_to_use = 0;
1325 txdr->next_to_clean = 0;
1326 spin_lock_init(&txdr->tx_lock);
1332 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1333 * (Descriptors) for all queues
1334 * @adapter: board private structure
1336 * If this function returns with an error, then it's possible one or
1337 * more of the rings is populated (while the rest are not). It is the
1338 * callers duty to clean those orphaned rings.
1340 * Return 0 on success, negative on failure
1344 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1348 for (i = 0; i < adapter->num_tx_queues; i++) {
1349 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1352 "Allocation for Tx Queue %u failed\n", i);
1361 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1362 * @adapter: board private structure
1364 * Configure the Tx unit of the MAC after a reset.
1368 e1000_configure_tx(struct e1000_adapter *adapter)
1371 struct e1000_hw *hw = &adapter->hw;
1372 uint32_t tdlen, tctl, tipg, tarc;
1373 uint32_t ipgr1, ipgr2;
1375 /* Setup the HW Tx Head and Tail descriptor pointers */
1377 switch (adapter->num_tx_queues) {
1379 tdba = adapter->tx_ring[1].dma;
1380 tdlen = adapter->tx_ring[1].count *
1381 sizeof(struct e1000_tx_desc);
1382 E1000_WRITE_REG(hw, TDBAL1, (tdba & 0x00000000ffffffffULL));
1383 E1000_WRITE_REG(hw, TDBAH1, (tdba >> 32));
1384 E1000_WRITE_REG(hw, TDLEN1, tdlen);
1385 E1000_WRITE_REG(hw, TDH1, 0);
1386 E1000_WRITE_REG(hw, TDT1, 0);
1387 adapter->tx_ring[1].tdh = E1000_TDH1;
1388 adapter->tx_ring[1].tdt = E1000_TDT1;
1392 tdba = adapter->tx_ring[0].dma;
1393 tdlen = adapter->tx_ring[0].count *
1394 sizeof(struct e1000_tx_desc);
1395 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1396 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1397 E1000_WRITE_REG(hw, TDLEN, tdlen);
1398 E1000_WRITE_REG(hw, TDH, 0);
1399 E1000_WRITE_REG(hw, TDT, 0);
1400 adapter->tx_ring[0].tdh = E1000_TDH;
1401 adapter->tx_ring[0].tdt = E1000_TDT;
1405 /* Set the default values for the Tx Inter Packet Gap timer */
1407 if (hw->media_type == e1000_media_type_fiber ||
1408 hw->media_type == e1000_media_type_internal_serdes)
1409 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1411 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1413 switch (hw->mac_type) {
1414 case e1000_82542_rev2_0:
1415 case e1000_82542_rev2_1:
1416 tipg = DEFAULT_82542_TIPG_IPGT;
1417 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1418 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1421 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1422 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1425 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1426 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1427 E1000_WRITE_REG(hw, TIPG, tipg);
1429 /* Set the Tx Interrupt Delay register */
1431 E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1432 if (hw->mac_type >= e1000_82540)
1433 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1435 /* Program the Transmit Control Register */
1437 tctl = E1000_READ_REG(hw, TCTL);
1439 tctl &= ~E1000_TCTL_CT;
1440 tctl |= E1000_TCTL_EN | E1000_TCTL_PSP | E1000_TCTL_RTLC |
1441 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1443 E1000_WRITE_REG(hw, TCTL, tctl);
1445 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1446 tarc = E1000_READ_REG(hw, TARC0);
1447 tarc |= ((1 << 25) | (1 << 21));
1448 E1000_WRITE_REG(hw, TARC0, tarc);
1449 tarc = E1000_READ_REG(hw, TARC1);
1451 if (tctl & E1000_TCTL_MULR)
1455 E1000_WRITE_REG(hw, TARC1, tarc);
1458 e1000_config_collision_dist(hw);
1460 /* Setup Transmit Descriptor Settings for eop descriptor */
1461 adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1464 if (hw->mac_type < e1000_82543)
1465 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1467 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1469 /* Cache if we're 82544 running in PCI-X because we'll
1470 * need this to apply a workaround later in the send path. */
1471 if (hw->mac_type == e1000_82544 &&
1472 hw->bus_type == e1000_bus_type_pcix)
1473 adapter->pcix_82544 = 1;
1477 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1478 * @adapter: board private structure
1479 * @rxdr: rx descriptor ring (for a specific queue) to setup
1481 * Returns 0 on success, negative on failure
1485 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1486 struct e1000_rx_ring *rxdr)
1488 struct pci_dev *pdev = adapter->pdev;
1491 size = sizeof(struct e1000_buffer) * rxdr->count;
1492 rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1493 if (!rxdr->buffer_info) {
1495 "Unable to allocate memory for the receive descriptor ring\n");
1498 memset(rxdr->buffer_info, 0, size);
1500 size = sizeof(struct e1000_ps_page) * rxdr->count;
1501 rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1502 if (!rxdr->ps_page) {
1503 vfree(rxdr->buffer_info);
1505 "Unable to allocate memory for the receive descriptor ring\n");
1508 memset(rxdr->ps_page, 0, size);
1510 size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1511 rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1512 if (!rxdr->ps_page_dma) {
1513 vfree(rxdr->buffer_info);
1514 kfree(rxdr->ps_page);
1516 "Unable to allocate memory for the receive descriptor ring\n");
1519 memset(rxdr->ps_page_dma, 0, size);
1521 if (adapter->hw.mac_type <= e1000_82547_rev_2)
1522 desc_len = sizeof(struct e1000_rx_desc);
1524 desc_len = sizeof(union e1000_rx_desc_packet_split);
1526 /* Round up to nearest 4K */
1528 rxdr->size = rxdr->count * desc_len;
1529 E1000_ROUNDUP(rxdr->size, 4096);
1531 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1535 "Unable to allocate memory for the receive descriptor ring\n");
1537 vfree(rxdr->buffer_info);
1538 kfree(rxdr->ps_page);
1539 kfree(rxdr->ps_page_dma);
1543 /* Fix for errata 23, can't cross 64kB boundary */
1544 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1545 void *olddesc = rxdr->desc;
1546 dma_addr_t olddma = rxdr->dma;
1547 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1548 "at %p\n", rxdr->size, rxdr->desc);
1549 /* Try again, without freeing the previous */
1550 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1551 /* Failed allocation, critical failure */
1553 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1555 "Unable to allocate memory "
1556 "for the receive descriptor ring\n");
1557 goto setup_rx_desc_die;
1560 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1562 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1564 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1566 "Unable to allocate aligned memory "
1567 "for the receive descriptor ring\n");
1568 goto setup_rx_desc_die;
1570 /* Free old allocation, new allocation was successful */
1571 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1574 memset(rxdr->desc, 0, rxdr->size);
1576 rxdr->next_to_clean = 0;
1577 rxdr->next_to_use = 0;
1578 rxdr->rx_skb_top = NULL;
1579 rxdr->rx_skb_prev = NULL;
1585 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1586 * (Descriptors) for all queues
1587 * @adapter: board private structure
1589 * If this function returns with an error, then it's possible one or
1590 * more of the rings is populated (while the rest are not). It is the
1591 * callers duty to clean those orphaned rings.
1593 * Return 0 on success, negative on failure
1597 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1601 for (i = 0; i < adapter->num_rx_queues; i++) {
1602 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1605 "Allocation for Rx Queue %u failed\n", i);
1614 * e1000_setup_rctl - configure the receive control registers
1615 * @adapter: Board private structure
1617 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1618 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1620 e1000_setup_rctl(struct e1000_adapter *adapter)
1622 uint32_t rctl, rfctl;
1623 uint32_t psrctl = 0;
1624 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1628 rctl = E1000_READ_REG(&adapter->hw, RCTL);
1630 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1632 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1633 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1634 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1636 if (adapter->hw.mac_type > e1000_82543)
1637 rctl |= E1000_RCTL_SECRC;
1639 if (adapter->hw.tbi_compatibility_on == 1)
1640 rctl |= E1000_RCTL_SBP;
1642 rctl &= ~E1000_RCTL_SBP;
1644 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1645 rctl &= ~E1000_RCTL_LPE;
1647 rctl |= E1000_RCTL_LPE;
1649 /* Setup buffer sizes */
1650 if (adapter->hw.mac_type >= e1000_82571) {
1651 /* We can now specify buffers in 1K increments.
1652 * BSIZE and BSEX are ignored in this case. */
1653 rctl |= adapter->rx_buffer_len << 0x11;
1655 rctl &= ~E1000_RCTL_SZ_4096;
1656 rctl &= ~E1000_RCTL_BSEX;
1657 rctl |= E1000_RCTL_SZ_2048;
1660 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1661 /* 82571 and greater support packet-split where the protocol
1662 * header is placed in skb->data and the packet data is
1663 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1664 * In the case of a non-split, skb->data is linearly filled,
1665 * followed by the page buffers. Therefore, skb->data is
1666 * sized to hold the largest protocol header.
1668 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1669 if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1671 adapter->rx_ps_pages = pages;
1673 adapter->rx_ps_pages = 0;
1675 if (adapter->rx_ps_pages) {
1676 /* Configure extra packet-split registers */
1677 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1678 rfctl |= E1000_RFCTL_EXTEN;
1679 /* disable IPv6 packet split support */
1680 rfctl |= E1000_RFCTL_IPV6_DIS;
1681 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1683 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1685 psrctl |= adapter->rx_ps_bsize0 >>
1686 E1000_PSRCTL_BSIZE0_SHIFT;
1688 switch (adapter->rx_ps_pages) {
1690 psrctl |= PAGE_SIZE <<
1691 E1000_PSRCTL_BSIZE3_SHIFT;
1693 psrctl |= PAGE_SIZE <<
1694 E1000_PSRCTL_BSIZE2_SHIFT;
1696 psrctl |= PAGE_SIZE >>
1697 E1000_PSRCTL_BSIZE1_SHIFT;
1701 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1704 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1708 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1709 * @adapter: board private structure
1711 * Configure the Rx unit of the MAC after a reset.
1715 e1000_configure_rx(struct e1000_adapter *adapter)
1718 struct e1000_hw *hw = &adapter->hw;
1719 uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1720 #ifdef CONFIG_E1000_MQ
1721 uint32_t reta, mrqc;
1725 if (adapter->rx_ps_pages) {
1726 rdlen = adapter->rx_ring[0].count *
1727 sizeof(union e1000_rx_desc_packet_split);
1728 adapter->clean_rx = e1000_clean_rx_irq_ps;
1729 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1731 rdlen = adapter->rx_ring[0].count *
1732 sizeof(struct e1000_rx_desc);
1733 adapter->clean_rx = e1000_clean_rx_irq;
1734 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1737 /* disable receives while setting up the descriptors */
1738 rctl = E1000_READ_REG(hw, RCTL);
1739 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1741 /* set the Receive Delay Timer Register */
1742 E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1744 if (hw->mac_type >= e1000_82540) {
1745 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1746 if (adapter->itr > 1)
1747 E1000_WRITE_REG(hw, ITR,
1748 1000000000 / (adapter->itr * 256));
1751 if (hw->mac_type >= e1000_82571) {
1752 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1753 /* Reset delay timers after every interrupt */
1754 ctrl_ext |= E1000_CTRL_EXT_CANC;
1755 #ifdef CONFIG_E1000_NAPI
1756 /* Auto-Mask interrupts upon ICR read. */
1757 ctrl_ext |= E1000_CTRL_EXT_IAME;
1759 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1760 E1000_WRITE_REG(hw, IAM, ~0);
1761 E1000_WRITE_FLUSH(hw);
1764 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1765 * the Base and Length of the Rx Descriptor Ring */
1766 switch (adapter->num_rx_queues) {
1767 #ifdef CONFIG_E1000_MQ
1769 rdba = adapter->rx_ring[1].dma;
1770 E1000_WRITE_REG(hw, RDBAL1, (rdba & 0x00000000ffffffffULL));
1771 E1000_WRITE_REG(hw, RDBAH1, (rdba >> 32));
1772 E1000_WRITE_REG(hw, RDLEN1, rdlen);
1773 E1000_WRITE_REG(hw, RDH1, 0);
1774 E1000_WRITE_REG(hw, RDT1, 0);
1775 adapter->rx_ring[1].rdh = E1000_RDH1;
1776 adapter->rx_ring[1].rdt = E1000_RDT1;
1781 rdba = adapter->rx_ring[0].dma;
1782 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1783 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1784 E1000_WRITE_REG(hw, RDLEN, rdlen);
1785 E1000_WRITE_REG(hw, RDH, 0);
1786 E1000_WRITE_REG(hw, RDT, 0);
1787 adapter->rx_ring[0].rdh = E1000_RDH;
1788 adapter->rx_ring[0].rdt = E1000_RDT;
1792 #ifdef CONFIG_E1000_MQ
1793 if (adapter->num_rx_queues > 1) {
1794 uint32_t random[10];
1796 get_random_bytes(&random[0], 40);
1798 if (hw->mac_type <= e1000_82572) {
1799 E1000_WRITE_REG(hw, RSSIR, 0);
1800 E1000_WRITE_REG(hw, RSSIM, 0);
1803 switch (adapter->num_rx_queues) {
1807 mrqc = E1000_MRQC_ENABLE_RSS_2Q;
1811 /* Fill out redirection table */
1812 for (i = 0; i < 32; i++)
1813 E1000_WRITE_REG_ARRAY(hw, RETA, i, reta);
1814 /* Fill out hash function seeds */
1815 for (i = 0; i < 10; i++)
1816 E1000_WRITE_REG_ARRAY(hw, RSSRK, i, random[i]);
1818 mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
1819 E1000_MRQC_RSS_FIELD_IPV4_TCP);
1820 E1000_WRITE_REG(hw, MRQC, mrqc);
1823 /* Multiqueue and packet checksumming are mutually exclusive. */
1824 if (hw->mac_type >= e1000_82571) {
1825 rxcsum = E1000_READ_REG(hw, RXCSUM);
1826 rxcsum |= E1000_RXCSUM_PCSD;
1827 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1832 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1833 if (hw->mac_type >= e1000_82543) {
1834 rxcsum = E1000_READ_REG(hw, RXCSUM);
1835 if (adapter->rx_csum == TRUE) {
1836 rxcsum |= E1000_RXCSUM_TUOFL;
1838 /* Enable 82571 IPv4 payload checksum for UDP fragments
1839 * Must be used in conjunction with packet-split. */
1840 if ((hw->mac_type >= e1000_82571) &&
1841 (adapter->rx_ps_pages)) {
1842 rxcsum |= E1000_RXCSUM_IPPCSE;
1845 rxcsum &= ~E1000_RXCSUM_TUOFL;
1846 /* don't need to clear IPPCSE as it defaults to 0 */
1848 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1850 #endif /* CONFIG_E1000_MQ */
1852 if (hw->mac_type == e1000_82573)
1853 E1000_WRITE_REG(hw, ERT, 0x0100);
1855 /* Enable Receives */
1856 E1000_WRITE_REG(hw, RCTL, rctl);
1860 * e1000_free_tx_resources - Free Tx Resources per Queue
1861 * @adapter: board private structure
1862 * @tx_ring: Tx descriptor ring for a specific queue
1864 * Free all transmit software resources
1868 e1000_free_tx_resources(struct e1000_adapter *adapter,
1869 struct e1000_tx_ring *tx_ring)
1871 struct pci_dev *pdev = adapter->pdev;
1873 e1000_clean_tx_ring(adapter, tx_ring);
1875 vfree(tx_ring->buffer_info);
1876 tx_ring->buffer_info = NULL;
1878 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1880 tx_ring->desc = NULL;
1884 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1885 * @adapter: board private structure
1887 * Free all transmit software resources
1891 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1895 for (i = 0; i < adapter->num_tx_queues; i++)
1896 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1900 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1901 struct e1000_buffer *buffer_info)
1903 if (buffer_info->dma) {
1904 pci_unmap_page(adapter->pdev,
1906 buffer_info->length,
1909 if (buffer_info->skb)
1910 dev_kfree_skb_any(buffer_info->skb);
1911 memset(buffer_info, 0, sizeof(struct e1000_buffer));
1915 * e1000_clean_tx_ring - Free Tx Buffers
1916 * @adapter: board private structure
1917 * @tx_ring: ring to be cleaned
1921 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1922 struct e1000_tx_ring *tx_ring)
1924 struct e1000_buffer *buffer_info;
1928 /* Free all the Tx ring sk_buffs */
1930 for (i = 0; i < tx_ring->count; i++) {
1931 buffer_info = &tx_ring->buffer_info[i];
1932 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1935 size = sizeof(struct e1000_buffer) * tx_ring->count;
1936 memset(tx_ring->buffer_info, 0, size);
1938 /* Zero out the descriptor ring */
1940 memset(tx_ring->desc, 0, tx_ring->size);
1942 tx_ring->next_to_use = 0;
1943 tx_ring->next_to_clean = 0;
1944 tx_ring->last_tx_tso = 0;
1946 writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1947 writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1951 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1952 * @adapter: board private structure
1956 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1960 for (i = 0; i < adapter->num_tx_queues; i++)
1961 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1965 * e1000_free_rx_resources - Free Rx Resources
1966 * @adapter: board private structure
1967 * @rx_ring: ring to clean the resources from
1969 * Free all receive software resources
1973 e1000_free_rx_resources(struct e1000_adapter *adapter,
1974 struct e1000_rx_ring *rx_ring)
1976 struct pci_dev *pdev = adapter->pdev;
1978 e1000_clean_rx_ring(adapter, rx_ring);
1980 vfree(rx_ring->buffer_info);
1981 rx_ring->buffer_info = NULL;
1982 kfree(rx_ring->ps_page);
1983 rx_ring->ps_page = NULL;
1984 kfree(rx_ring->ps_page_dma);
1985 rx_ring->ps_page_dma = NULL;
1987 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1989 rx_ring->desc = NULL;
1993 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1994 * @adapter: board private structure
1996 * Free all receive software resources
2000 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2004 for (i = 0; i < adapter->num_rx_queues; i++)
2005 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2009 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2010 * @adapter: board private structure
2011 * @rx_ring: ring to free buffers from
2015 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2016 struct e1000_rx_ring *rx_ring)
2018 struct e1000_buffer *buffer_info;
2019 struct e1000_ps_page *ps_page;
2020 struct e1000_ps_page_dma *ps_page_dma;
2021 struct pci_dev *pdev = adapter->pdev;
2025 /* Free all the Rx ring sk_buffs */
2026 for (i = 0; i < rx_ring->count; i++) {
2027 buffer_info = &rx_ring->buffer_info[i];
2028 if (buffer_info->skb) {
2029 pci_unmap_single(pdev,
2031 buffer_info->length,
2032 PCI_DMA_FROMDEVICE);
2034 dev_kfree_skb(buffer_info->skb);
2035 buffer_info->skb = NULL;
2037 ps_page = &rx_ring->ps_page[i];
2038 ps_page_dma = &rx_ring->ps_page_dma[i];
2039 for (j = 0; j < adapter->rx_ps_pages; j++) {
2040 if (!ps_page->ps_page[j]) break;
2041 pci_unmap_page(pdev,
2042 ps_page_dma->ps_page_dma[j],
2043 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2044 ps_page_dma->ps_page_dma[j] = 0;
2045 put_page(ps_page->ps_page[j]);
2046 ps_page->ps_page[j] = NULL;
2050 /* there also may be some cached data in our adapter */
2051 if (rx_ring->rx_skb_top) {
2052 dev_kfree_skb(rx_ring->rx_skb_top);
2054 /* rx_skb_prev will be wiped out by rx_skb_top */
2055 rx_ring->rx_skb_top = NULL;
2056 rx_ring->rx_skb_prev = NULL;
2060 size = sizeof(struct e1000_buffer) * rx_ring->count;
2061 memset(rx_ring->buffer_info, 0, size);
2062 size = sizeof(struct e1000_ps_page) * rx_ring->count;
2063 memset(rx_ring->ps_page, 0, size);
2064 size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2065 memset(rx_ring->ps_page_dma, 0, size);
2067 /* Zero out the descriptor ring */
2069 memset(rx_ring->desc, 0, rx_ring->size);
2071 rx_ring->next_to_clean = 0;
2072 rx_ring->next_to_use = 0;
2074 writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2075 writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2079 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2080 * @adapter: board private structure
2084 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2088 for (i = 0; i < adapter->num_rx_queues; i++)
2089 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2092 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2093 * and memory write and invalidate disabled for certain operations
2096 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2098 struct net_device *netdev = adapter->netdev;
2101 e1000_pci_clear_mwi(&adapter->hw);
2103 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2104 rctl |= E1000_RCTL_RST;
2105 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2106 E1000_WRITE_FLUSH(&adapter->hw);
2109 if (netif_running(netdev))
2110 e1000_clean_all_rx_rings(adapter);
2114 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2116 struct net_device *netdev = adapter->netdev;
2119 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2120 rctl &= ~E1000_RCTL_RST;
2121 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2122 E1000_WRITE_FLUSH(&adapter->hw);
2125 if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2126 e1000_pci_set_mwi(&adapter->hw);
2128 if (netif_running(netdev)) {
2129 e1000_configure_rx(adapter);
2130 /* No need to loop, because 82542 supports only 1 queue */
2131 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2132 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2137 * e1000_set_mac - Change the Ethernet Address of the NIC
2138 * @netdev: network interface device structure
2139 * @p: pointer to an address structure
2141 * Returns 0 on success, negative on failure
2145 e1000_set_mac(struct net_device *netdev, void *p)
2147 struct e1000_adapter *adapter = netdev_priv(netdev);
2148 struct sockaddr *addr = p;
2150 if (!is_valid_ether_addr(addr->sa_data))
2151 return -EADDRNOTAVAIL;
2153 /* 82542 2.0 needs to be in reset to write receive address registers */
2155 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2156 e1000_enter_82542_rst(adapter);
2158 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2159 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2161 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2163 /* With 82571 controllers, LAA may be overwritten (with the default)
2164 * due to controller reset from the other port. */
2165 if (adapter->hw.mac_type == e1000_82571) {
2166 /* activate the work around */
2167 adapter->hw.laa_is_present = 1;
2169 /* Hold a copy of the LAA in RAR[14] This is done so that
2170 * between the time RAR[0] gets clobbered and the time it
2171 * gets fixed (in e1000_watchdog), the actual LAA is in one
2172 * of the RARs and no incoming packets directed to this port
2173 * are dropped. Eventaully the LAA will be in RAR[0] and
2175 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2176 E1000_RAR_ENTRIES - 1);
2179 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2180 e1000_leave_82542_rst(adapter);
2186 * e1000_set_multi - Multicast and Promiscuous mode set
2187 * @netdev: network interface device structure
2189 * The set_multi entry point is called whenever the multicast address
2190 * list or the network interface flags are updated. This routine is
2191 * responsible for configuring the hardware for proper multicast,
2192 * promiscuous mode, and all-multi behavior.
2196 e1000_set_multi(struct net_device *netdev)
2198 struct e1000_adapter *adapter = netdev_priv(netdev);
2199 struct e1000_hw *hw = &adapter->hw;
2200 struct dev_mc_list *mc_ptr;
2202 uint32_t hash_value;
2203 int i, rar_entries = E1000_RAR_ENTRIES;
2205 /* reserve RAR[14] for LAA over-write work-around */
2206 if (adapter->hw.mac_type == e1000_82571)
2209 /* Check for Promiscuous and All Multicast modes */
2211 rctl = E1000_READ_REG(hw, RCTL);
2213 if (netdev->flags & IFF_PROMISC) {
2214 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2215 } else if (netdev->flags & IFF_ALLMULTI) {
2216 rctl |= E1000_RCTL_MPE;
2217 rctl &= ~E1000_RCTL_UPE;
2219 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2222 E1000_WRITE_REG(hw, RCTL, rctl);
2224 /* 82542 2.0 needs to be in reset to write receive address registers */
2226 if (hw->mac_type == e1000_82542_rev2_0)
2227 e1000_enter_82542_rst(adapter);
2229 /* load the first 14 multicast address into the exact filters 1-14
2230 * RAR 0 is used for the station MAC adddress
2231 * if there are not 14 addresses, go ahead and clear the filters
2232 * -- with 82571 controllers only 0-13 entries are filled here
2234 mc_ptr = netdev->mc_list;
2236 for (i = 1; i < rar_entries; i++) {
2238 e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2239 mc_ptr = mc_ptr->next;
2241 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2242 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2246 /* clear the old settings from the multicast hash table */
2248 for (i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2249 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2251 /* load any remaining addresses into the hash table */
2253 for (; mc_ptr; mc_ptr = mc_ptr->next) {
2254 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2255 e1000_mta_set(hw, hash_value);
2258 if (hw->mac_type == e1000_82542_rev2_0)
2259 e1000_leave_82542_rst(adapter);
2262 /* Need to wait a few seconds after link up to get diagnostic information from
2266 e1000_update_phy_info(unsigned long data)
2268 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2269 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2273 * e1000_82547_tx_fifo_stall - Timer Call-back
2274 * @data: pointer to adapter cast into an unsigned long
2278 e1000_82547_tx_fifo_stall(unsigned long data)
2280 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2281 struct net_device *netdev = adapter->netdev;
2284 if (atomic_read(&adapter->tx_fifo_stall)) {
2285 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2286 E1000_READ_REG(&adapter->hw, TDH)) &&
2287 (E1000_READ_REG(&adapter->hw, TDFT) ==
2288 E1000_READ_REG(&adapter->hw, TDFH)) &&
2289 (E1000_READ_REG(&adapter->hw, TDFTS) ==
2290 E1000_READ_REG(&adapter->hw, TDFHS))) {
2291 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2292 E1000_WRITE_REG(&adapter->hw, TCTL,
2293 tctl & ~E1000_TCTL_EN);
2294 E1000_WRITE_REG(&adapter->hw, TDFT,
2295 adapter->tx_head_addr);
2296 E1000_WRITE_REG(&adapter->hw, TDFH,
2297 adapter->tx_head_addr);
2298 E1000_WRITE_REG(&adapter->hw, TDFTS,
2299 adapter->tx_head_addr);
2300 E1000_WRITE_REG(&adapter->hw, TDFHS,
2301 adapter->tx_head_addr);
2302 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2303 E1000_WRITE_FLUSH(&adapter->hw);
2305 adapter->tx_fifo_head = 0;
2306 atomic_set(&adapter->tx_fifo_stall, 0);
2307 netif_wake_queue(netdev);
2309 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2315 * e1000_watchdog - Timer Call-back
2316 * @data: pointer to adapter cast into an unsigned long
2319 e1000_watchdog(unsigned long data)
2321 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2323 /* Do the rest outside of interrupt context */
2324 schedule_work(&adapter->watchdog_task);
2328 e1000_watchdog_task(struct e1000_adapter *adapter)
2330 struct net_device *netdev = adapter->netdev;
2331 struct e1000_tx_ring *txdr = adapter->tx_ring;
2334 e1000_check_for_link(&adapter->hw);
2335 if (adapter->hw.mac_type == e1000_82573) {
2336 e1000_enable_tx_pkt_filtering(&adapter->hw);
2337 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2338 e1000_update_mng_vlan(adapter);
2341 if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2342 !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2343 link = !adapter->hw.serdes_link_down;
2345 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2348 if (!netif_carrier_ok(netdev)) {
2349 e1000_get_speed_and_duplex(&adapter->hw,
2350 &adapter->link_speed,
2351 &adapter->link_duplex);
2353 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2354 adapter->link_speed,
2355 adapter->link_duplex == FULL_DUPLEX ?
2356 "Full Duplex" : "Half Duplex");
2358 /* tweak tx_queue_len according to speed/duplex */
2359 netdev->tx_queue_len = adapter->tx_queue_len;
2360 adapter->tx_timeout_factor = 1;
2361 if (adapter->link_duplex == HALF_DUPLEX) {
2362 switch (adapter->link_speed) {
2364 netdev->tx_queue_len = 10;
2365 adapter->tx_timeout_factor = 8;
2368 netdev->tx_queue_len = 100;
2373 netif_carrier_on(netdev);
2374 netif_wake_queue(netdev);
2375 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2376 adapter->smartspeed = 0;
2379 if (netif_carrier_ok(netdev)) {
2380 adapter->link_speed = 0;
2381 adapter->link_duplex = 0;
2382 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2383 netif_carrier_off(netdev);
2384 netif_stop_queue(netdev);
2385 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2388 e1000_smartspeed(adapter);
2391 e1000_update_stats(adapter);
2393 adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2394 adapter->tpt_old = adapter->stats.tpt;
2395 adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2396 adapter->colc_old = adapter->stats.colc;
2398 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2399 adapter->gorcl_old = adapter->stats.gorcl;
2400 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2401 adapter->gotcl_old = adapter->stats.gotcl;
2403 e1000_update_adaptive(&adapter->hw);
2405 #ifdef CONFIG_E1000_MQ
2406 txdr = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2408 if (!netif_carrier_ok(netdev)) {
2409 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2410 /* We've lost link, so the controller stops DMA,
2411 * but we've got queued Tx work that's never going
2412 * to get done, so reset controller to flush Tx.
2413 * (Do the reset outside of interrupt context). */
2414 schedule_work(&adapter->tx_timeout_task);
2418 /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2419 if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2420 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2421 * asymmetrical Tx or Rx gets ITR=8000; everyone
2422 * else is between 2000-8000. */
2423 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2424 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2425 adapter->gotcl - adapter->gorcl :
2426 adapter->gorcl - adapter->gotcl) / 10000;
2427 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2428 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2431 /* Cause software interrupt to ensure rx ring is cleaned */
2432 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2434 /* Force detection of hung controller every watchdog period */
2435 adapter->detect_tx_hung = TRUE;
2437 /* With 82571 controllers, LAA may be overwritten due to controller
2438 * reset from the other port. Set the appropriate LAA in RAR[0] */
2439 if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2440 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2442 /* Reset the timer */
2443 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2446 #define E1000_TX_FLAGS_CSUM 0x00000001
2447 #define E1000_TX_FLAGS_VLAN 0x00000002
2448 #define E1000_TX_FLAGS_TSO 0x00000004
2449 #define E1000_TX_FLAGS_IPV4 0x00000008
2450 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2451 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2454 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2455 struct sk_buff *skb)
2458 struct e1000_context_desc *context_desc;
2459 struct e1000_buffer *buffer_info;
2461 uint32_t cmd_length = 0;
2462 uint16_t ipcse = 0, tucse, mss;
2463 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2466 if (skb_shinfo(skb)->tso_size) {
2467 if (skb_header_cloned(skb)) {
2468 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2473 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2474 mss = skb_shinfo(skb)->tso_size;
2475 if (skb->protocol == ntohs(ETH_P_IP)) {
2476 skb->nh.iph->tot_len = 0;
2477 skb->nh.iph->check = 0;
2479 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2484 cmd_length = E1000_TXD_CMD_IP;
2485 ipcse = skb->h.raw - skb->data - 1;
2486 #ifdef NETIF_F_TSO_IPV6
2487 } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
2488 skb->nh.ipv6h->payload_len = 0;
2490 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2491 &skb->nh.ipv6h->daddr,
2498 ipcss = skb->nh.raw - skb->data;
2499 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2500 tucss = skb->h.raw - skb->data;
2501 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2504 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2505 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2507 i = tx_ring->next_to_use;
2508 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2509 buffer_info = &tx_ring->buffer_info[i];
2511 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2512 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2513 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2514 context_desc->upper_setup.tcp_fields.tucss = tucss;
2515 context_desc->upper_setup.tcp_fields.tucso = tucso;
2516 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2517 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2518 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2519 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2521 buffer_info->time_stamp = jiffies;
2523 if (++i == tx_ring->count) i = 0;
2524 tx_ring->next_to_use = i;
2533 static inline boolean_t
2534 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2535 struct sk_buff *skb)
2537 struct e1000_context_desc *context_desc;
2538 struct e1000_buffer *buffer_info;
2542 if (likely(skb->ip_summed == CHECKSUM_HW)) {
2543 css = skb->h.raw - skb->data;
2545 i = tx_ring->next_to_use;
2546 buffer_info = &tx_ring->buffer_info[i];
2547 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2549 context_desc->upper_setup.tcp_fields.tucss = css;
2550 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2551 context_desc->upper_setup.tcp_fields.tucse = 0;
2552 context_desc->tcp_seg_setup.data = 0;
2553 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2555 buffer_info->time_stamp = jiffies;
2557 if (unlikely(++i == tx_ring->count)) i = 0;
2558 tx_ring->next_to_use = i;
2566 #define E1000_MAX_TXD_PWR 12
2567 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2570 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2571 struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2572 unsigned int nr_frags, unsigned int mss)
2574 struct e1000_buffer *buffer_info;
2575 unsigned int len = skb->len;
2576 unsigned int offset = 0, size, count = 0, i;
2578 len -= skb->data_len;
2580 i = tx_ring->next_to_use;
2583 buffer_info = &tx_ring->buffer_info[i];
2584 size = min(len, max_per_txd);
2586 /* Workaround for Controller erratum --
2587 * descriptor for non-tso packet in a linear SKB that follows a
2588 * tso gets written back prematurely before the data is fully
2589 * DMAd to the controller */
2590 if (!skb->data_len && tx_ring->last_tx_tso &&
2591 !skb_shinfo(skb)->tso_size) {
2592 tx_ring->last_tx_tso = 0;
2596 /* Workaround for premature desc write-backs
2597 * in TSO mode. Append 4-byte sentinel desc */
2598 if (unlikely(mss && !nr_frags && size == len && size > 8))
2601 /* work-around for errata 10 and it applies
2602 * to all controllers in PCI-X mode
2603 * The fix is to make sure that the first descriptor of a
2604 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2606 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2607 (size > 2015) && count == 0))
2610 /* Workaround for potential 82544 hang in PCI-X. Avoid
2611 * terminating buffers within evenly-aligned dwords. */
2612 if (unlikely(adapter->pcix_82544 &&
2613 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2617 buffer_info->length = size;
2619 pci_map_single(adapter->pdev,
2623 buffer_info->time_stamp = jiffies;
2628 if (unlikely(++i == tx_ring->count)) i = 0;
2631 for (f = 0; f < nr_frags; f++) {
2632 struct skb_frag_struct *frag;
2634 frag = &skb_shinfo(skb)->frags[f];
2636 offset = frag->page_offset;
2639 buffer_info = &tx_ring->buffer_info[i];
2640 size = min(len, max_per_txd);
2642 /* Workaround for premature desc write-backs
2643 * in TSO mode. Append 4-byte sentinel desc */
2644 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2647 /* Workaround for potential 82544 hang in PCI-X.
2648 * Avoid terminating buffers within evenly-aligned
2650 if (unlikely(adapter->pcix_82544 &&
2651 !((unsigned long)(frag->page+offset+size-1) & 4) &&
2655 buffer_info->length = size;
2657 pci_map_page(adapter->pdev,
2662 buffer_info->time_stamp = jiffies;
2667 if (unlikely(++i == tx_ring->count)) i = 0;
2671 i = (i == 0) ? tx_ring->count - 1 : i - 1;
2672 tx_ring->buffer_info[i].skb = skb;
2673 tx_ring->buffer_info[first].next_to_watch = i;
2679 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2680 int tx_flags, int count)
2682 struct e1000_tx_desc *tx_desc = NULL;
2683 struct e1000_buffer *buffer_info;
2684 uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2687 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2688 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2690 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2692 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2693 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2696 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2697 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2698 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2701 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2702 txd_lower |= E1000_TXD_CMD_VLE;
2703 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2706 i = tx_ring->next_to_use;
2709 buffer_info = &tx_ring->buffer_info[i];
2710 tx_desc = E1000_TX_DESC(*tx_ring, i);
2711 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2712 tx_desc->lower.data =
2713 cpu_to_le32(txd_lower | buffer_info->length);
2714 tx_desc->upper.data = cpu_to_le32(txd_upper);
2715 if (unlikely(++i == tx_ring->count)) i = 0;
2718 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2720 /* Force memory writes to complete before letting h/w
2721 * know there are new descriptors to fetch. (Only
2722 * applicable for weak-ordered memory model archs,
2723 * such as IA-64). */
2726 tx_ring->next_to_use = i;
2727 writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2731 * 82547 workaround to avoid controller hang in half-duplex environment.
2732 * The workaround is to avoid queuing a large packet that would span
2733 * the internal Tx FIFO ring boundary by notifying the stack to resend
2734 * the packet at a later time. This gives the Tx FIFO an opportunity to
2735 * flush all packets. When that occurs, we reset the Tx FIFO pointers
2736 * to the beginning of the Tx FIFO.
2739 #define E1000_FIFO_HDR 0x10
2740 #define E1000_82547_PAD_LEN 0x3E0
2743 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2745 uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2746 uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2748 E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2750 if (adapter->link_duplex != HALF_DUPLEX)
2751 goto no_fifo_stall_required;
2753 if (atomic_read(&adapter->tx_fifo_stall))
2756 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2757 atomic_set(&adapter->tx_fifo_stall, 1);
2761 no_fifo_stall_required:
2762 adapter->tx_fifo_head += skb_fifo_len;
2763 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2764 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2768 #define MINIMUM_DHCP_PACKET_SIZE 282
2770 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2772 struct e1000_hw *hw = &adapter->hw;
2773 uint16_t length, offset;
2774 if (vlan_tx_tag_present(skb)) {
2775 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2776 ( adapter->hw.mng_cookie.status &
2777 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2780 if ((skb->len > MINIMUM_DHCP_PACKET_SIZE) && (!skb->protocol)) {
2781 struct ethhdr *eth = (struct ethhdr *) skb->data;
2782 if ((htons(ETH_P_IP) == eth->h_proto)) {
2783 const struct iphdr *ip =
2784 (struct iphdr *)((uint8_t *)skb->data+14);
2785 if (IPPROTO_UDP == ip->protocol) {
2786 struct udphdr *udp =
2787 (struct udphdr *)((uint8_t *)ip +
2789 if (ntohs(udp->dest) == 67) {
2790 offset = (uint8_t *)udp + 8 - skb->data;
2791 length = skb->len - offset;
2793 return e1000_mng_write_dhcp_info(hw,
2803 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2805 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2807 struct e1000_adapter *adapter = netdev_priv(netdev);
2808 struct e1000_tx_ring *tx_ring;
2809 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2810 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2811 unsigned int tx_flags = 0;
2812 unsigned int len = skb->len;
2813 unsigned long flags;
2814 unsigned int nr_frags = 0;
2815 unsigned int mss = 0;
2819 len -= skb->data_len;
2821 #ifdef CONFIG_E1000_MQ
2822 tx_ring = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2824 tx_ring = adapter->tx_ring;
2827 if (unlikely(skb->len <= 0)) {
2828 dev_kfree_skb_any(skb);
2829 return NETDEV_TX_OK;
2833 mss = skb_shinfo(skb)->tso_size;
2834 /* The controller does a simple calculation to
2835 * make sure there is enough room in the FIFO before
2836 * initiating the DMA for each buffer. The calc is:
2837 * 4 = ceil(buffer len/mss). To make sure we don't
2838 * overrun the FIFO, adjust the max buffer len if mss
2842 max_per_txd = min(mss << 2, max_per_txd);
2843 max_txd_pwr = fls(max_per_txd) - 1;
2845 /* TSO Workaround for 82571/2 Controllers -- if skb->data
2846 * points to just header, pull a few bytes of payload from
2847 * frags into skb->data */
2848 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2849 if (skb->data_len && (hdr_len == (skb->len - skb->data_len)) &&
2850 (adapter->hw.mac_type == e1000_82571 ||
2851 adapter->hw.mac_type == e1000_82572)) {
2852 unsigned int pull_size;
2853 pull_size = min((unsigned int)4, skb->data_len);
2854 if (!__pskb_pull_tail(skb, pull_size)) {
2855 printk(KERN_ERR "__pskb_pull_tail failed.\n");
2856 dev_kfree_skb_any(skb);
2859 len = skb->len - skb->data_len;
2863 /* reserve a descriptor for the offload context */
2864 if ((mss) || (skb->ip_summed == CHECKSUM_HW))
2868 if (skb->ip_summed == CHECKSUM_HW)
2873 /* Controller Erratum workaround */
2874 if (!skb->data_len && tx_ring->last_tx_tso &&
2875 !skb_shinfo(skb)->tso_size)
2879 count += TXD_USE_COUNT(len, max_txd_pwr);
2881 if (adapter->pcix_82544)
2884 /* work-around for errata 10 and it applies to all controllers
2885 * in PCI-X mode, so add one more descriptor to the count
2887 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2891 nr_frags = skb_shinfo(skb)->nr_frags;
2892 for (f = 0; f < nr_frags; f++)
2893 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2895 if (adapter->pcix_82544)
2898 if (adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
2899 e1000_transfer_dhcp_info(adapter, skb);
2901 local_irq_save(flags);
2902 if (!spin_trylock(&tx_ring->tx_lock)) {
2903 /* Collision - tell upper layer to requeue */
2904 local_irq_restore(flags);
2905 return NETDEV_TX_LOCKED;
2908 /* need: count + 2 desc gap to keep tail from touching
2909 * head, otherwise try next time */
2910 if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2911 netif_stop_queue(netdev);
2912 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2913 return NETDEV_TX_BUSY;
2916 if (unlikely(adapter->hw.mac_type == e1000_82547)) {
2917 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2918 netif_stop_queue(netdev);
2919 mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2920 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2921 return NETDEV_TX_BUSY;
2925 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2926 tx_flags |= E1000_TX_FLAGS_VLAN;
2927 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2930 first = tx_ring->next_to_use;
2932 tso = e1000_tso(adapter, tx_ring, skb);
2934 dev_kfree_skb_any(skb);
2935 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2936 return NETDEV_TX_OK;
2940 tx_ring->last_tx_tso = 1;
2941 tx_flags |= E1000_TX_FLAGS_TSO;
2942 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2943 tx_flags |= E1000_TX_FLAGS_CSUM;
2945 /* Old method was to assume IPv4 packet by default if TSO was enabled.
2946 * 82571 hardware supports TSO capabilities for IPv6 as well...
2947 * no longer assume, we must. */
2948 if (likely(skb->protocol == ntohs(ETH_P_IP)))
2949 tx_flags |= E1000_TX_FLAGS_IPV4;
2951 e1000_tx_queue(adapter, tx_ring, tx_flags,
2952 e1000_tx_map(adapter, tx_ring, skb, first,
2953 max_per_txd, nr_frags, mss));
2955 netdev->trans_start = jiffies;
2957 /* Make sure there is space in the ring for the next send. */
2958 if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2959 netif_stop_queue(netdev);
2961 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2962 return NETDEV_TX_OK;
2966 * e1000_tx_timeout - Respond to a Tx Hang
2967 * @netdev: network interface device structure
2971 e1000_tx_timeout(struct net_device *netdev)
2973 struct e1000_adapter *adapter = netdev_priv(netdev);
2975 /* Do the reset outside of interrupt context */
2976 schedule_work(&adapter->tx_timeout_task);
2980 e1000_tx_timeout_task(struct net_device *netdev)
2982 struct e1000_adapter *adapter = netdev_priv(netdev);
2984 adapter->tx_timeout_count++;
2985 e1000_down(adapter);
2990 * e1000_get_stats - Get System Network Statistics
2991 * @netdev: network interface device structure
2993 * Returns the address of the device statistics structure.
2994 * The statistics are actually updated from the timer callback.
2997 static struct net_device_stats *
2998 e1000_get_stats(struct net_device *netdev)
3000 struct e1000_adapter *adapter = netdev_priv(netdev);
3002 /* only return the current stats */
3003 return &adapter->net_stats;
3007 * e1000_change_mtu - Change the Maximum Transfer Unit
3008 * @netdev: network interface device structure
3009 * @new_mtu: new value for maximum frame size
3011 * Returns 0 on success, negative on failure
3015 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3017 struct e1000_adapter *adapter = netdev_priv(netdev);
3018 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3020 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3021 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3022 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3026 /* Adapter-specific max frame size limits. */
3027 switch (adapter->hw.mac_type) {
3028 case e1000_82542_rev2_0:
3029 case e1000_82542_rev2_1:
3031 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3032 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3038 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3039 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3040 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3045 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3049 /* since the driver code now supports splitting a packet across
3050 * multiple descriptors, most of the fifo related limitations on
3051 * jumbo frame traffic have gone away.
3052 * simply use 2k descriptors for everything.
3054 * NOTE: dev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3055 * means we reserve 2 more, this pushes us to allocate from the next
3057 * i.e. RXBUFFER_2048 --> size-4096 slab */
3059 /* recent hardware supports 1KB granularity */
3060 if (adapter->hw.mac_type > e1000_82547_rev_2) {
3061 adapter->rx_buffer_len =
3062 ((max_frame < E1000_RXBUFFER_2048) ?
3063 max_frame : E1000_RXBUFFER_2048);
3064 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
3066 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3068 netdev->mtu = new_mtu;
3070 if (netif_running(netdev)) {
3071 e1000_down(adapter);
3075 adapter->hw.max_frame_size = max_frame;
3081 * e1000_update_stats - Update the board statistics counters
3082 * @adapter: board private structure
3086 e1000_update_stats(struct e1000_adapter *adapter)
3088 struct e1000_hw *hw = &adapter->hw;
3089 unsigned long flags;
3092 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3094 spin_lock_irqsave(&adapter->stats_lock, flags);
3096 /* these counters are modified from e1000_adjust_tbi_stats,
3097 * called from the interrupt context, so they must only
3098 * be written while holding adapter->stats_lock
3101 adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3102 adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3103 adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3104 adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3105 adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3106 adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3107 adapter->stats.roc += E1000_READ_REG(hw, ROC);
3108 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3109 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3110 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3111 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3112 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3113 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3115 adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3116 adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3117 adapter->stats.scc += E1000_READ_REG(hw, SCC);
3118 adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3119 adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3120 adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3121 adapter->stats.dc += E1000_READ_REG(hw, DC);
3122 adapter->stats.sec += E1000_READ_REG(hw, SEC);
3123 adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3124 adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3125 adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3126 adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3127 adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3128 adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3129 adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3130 adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3131 adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3132 adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3133 adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3134 adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3135 adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3136 adapter->stats.torl += E1000_READ_REG(hw, TORL);
3137 adapter->stats.torh += E1000_READ_REG(hw, TORH);
3138 adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3139 adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3140 adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3141 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3142 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3143 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3144 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3145 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3146 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3147 adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3148 adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3150 /* used for adaptive IFS */
3152 hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3153 adapter->stats.tpt += hw->tx_packet_delta;
3154 hw->collision_delta = E1000_READ_REG(hw, COLC);
3155 adapter->stats.colc += hw->collision_delta;
3157 if (hw->mac_type >= e1000_82543) {
3158 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3159 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3160 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3161 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3162 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3163 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3165 if (hw->mac_type > e1000_82547_rev_2) {
3166 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3167 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3168 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3169 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3170 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3171 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3172 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3173 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3174 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3177 /* Fill out the OS statistics structure */
3179 adapter->net_stats.rx_packets = adapter->stats.gprc;
3180 adapter->net_stats.tx_packets = adapter->stats.gptc;
3181 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3182 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3183 adapter->net_stats.multicast = adapter->stats.mprc;
3184 adapter->net_stats.collisions = adapter->stats.colc;
3188 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3189 adapter->stats.crcerrs + adapter->stats.algnerrc +
3190 adapter->stats.rlec + adapter->stats.cexterr;
3191 adapter->net_stats.rx_dropped = 0;
3192 adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3193 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3194 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3195 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3199 adapter->net_stats.tx_errors = adapter->stats.ecol +
3200 adapter->stats.latecol;
3201 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3202 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3203 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3205 /* Tx Dropped needs to be maintained elsewhere */
3209 if (hw->media_type == e1000_media_type_copper) {
3210 if ((adapter->link_speed == SPEED_1000) &&
3211 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3212 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3213 adapter->phy_stats.idle_errors += phy_tmp;
3216 if ((hw->mac_type <= e1000_82546) &&
3217 (hw->phy_type == e1000_phy_m88) &&
3218 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3219 adapter->phy_stats.receive_errors += phy_tmp;
3222 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3225 #ifdef CONFIG_E1000_MQ
3227 e1000_rx_schedule(void *data)
3229 struct net_device *poll_dev, *netdev = data;
3230 struct e1000_adapter *adapter = netdev->priv;
3231 int this_cpu = get_cpu();
3233 poll_dev = *per_cpu_ptr(adapter->cpu_netdev, this_cpu);
3234 if (poll_dev == NULL) {
3239 if (likely(netif_rx_schedule_prep(poll_dev)))
3240 __netif_rx_schedule(poll_dev);
3242 e1000_irq_enable(adapter);
3249 * e1000_intr - Interrupt Handler
3250 * @irq: interrupt number
3251 * @data: pointer to a network interface device structure
3252 * @pt_regs: CPU registers structure
3256 e1000_intr(int irq, void *data, struct pt_regs *regs)
3258 struct net_device *netdev = data;
3259 struct e1000_adapter *adapter = netdev_priv(netdev);
3260 struct e1000_hw *hw = &adapter->hw;
3261 uint32_t icr = E1000_READ_REG(hw, ICR);
3262 #ifndef CONFIG_E1000_NAPI
3265 /* Interrupt Auto-Mask...upon reading ICR,
3266 * interrupts are masked. No need for the
3267 * IMC write, but it does mean we should
3268 * account for it ASAP. */
3269 if (likely(hw->mac_type >= e1000_82571))
3270 atomic_inc(&adapter->irq_sem);
3273 if (unlikely(!icr)) {
3274 #ifdef CONFIG_E1000_NAPI
3275 if (hw->mac_type >= e1000_82571)
3276 e1000_irq_enable(adapter);
3278 return IRQ_NONE; /* Not our interrupt */
3281 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3282 hw->get_link_status = 1;
3283 mod_timer(&adapter->watchdog_timer, jiffies);
3286 #ifdef CONFIG_E1000_NAPI
3287 if (unlikely(hw->mac_type < e1000_82571)) {
3288 atomic_inc(&adapter->irq_sem);
3289 E1000_WRITE_REG(hw, IMC, ~0);
3290 E1000_WRITE_FLUSH(hw);
3292 #ifdef CONFIG_E1000_MQ
3293 if (atomic_read(&adapter->rx_sched_call_data.count) == 0) {
3294 /* We must setup the cpumask once count == 0 since
3295 * each cpu bit is cleared when the work is done. */
3296 adapter->rx_sched_call_data.cpumask = adapter->cpumask;
3297 atomic_add(adapter->num_rx_queues - 1, &adapter->irq_sem);
3298 atomic_set(&adapter->rx_sched_call_data.count,
3299 adapter->num_rx_queues);
3300 smp_call_async_mask(&adapter->rx_sched_call_data);
3302 printk("call_data.count == %u\n", atomic_read(&adapter->rx_sched_call_data.count));
3304 #else /* if !CONFIG_E1000_MQ */
3305 if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3306 __netif_rx_schedule(&adapter->polling_netdev[0]);
3308 e1000_irq_enable(adapter);
3309 #endif /* CONFIG_E1000_MQ */
3311 #else /* if !CONFIG_E1000_NAPI */
3312 /* Writing IMC and IMS is needed for 82547.
3313 * Due to Hub Link bus being occupied, an interrupt
3314 * de-assertion message is not able to be sent.
3315 * When an interrupt assertion message is generated later,
3316 * two messages are re-ordered and sent out.
3317 * That causes APIC to think 82547 is in de-assertion
3318 * state, while 82547 is in assertion state, resulting
3319 * in dead lock. Writing IMC forces 82547 into
3320 * de-assertion state.
3322 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3323 atomic_inc(&adapter->irq_sem);
3324 E1000_WRITE_REG(hw, IMC, ~0);
3327 for (i = 0; i < E1000_MAX_INTR; i++)
3328 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3329 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3332 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3333 e1000_irq_enable(adapter);
3335 #endif /* CONFIG_E1000_NAPI */
3340 #ifdef CONFIG_E1000_NAPI
3342 * e1000_clean - NAPI Rx polling callback
3343 * @adapter: board private structure
3347 e1000_clean(struct net_device *poll_dev, int *budget)
3349 struct e1000_adapter *adapter;
3350 int work_to_do = min(*budget, poll_dev->quota);
3351 int tx_cleaned = 0, i = 0, work_done = 0;
3353 /* Must NOT use netdev_priv macro here. */
3354 adapter = poll_dev->priv;
3356 /* Keep link state information with original netdev */
3357 if (!netif_carrier_ok(adapter->netdev))
3360 while (poll_dev != &adapter->polling_netdev[i]) {
3362 if (unlikely(i == adapter->num_rx_queues))
3366 if (likely(adapter->num_tx_queues == 1)) {
3367 /* e1000_clean is called per-cpu. This lock protects
3368 * tx_ring[0] from being cleaned by multiple cpus
3369 * simultaneously. A failure obtaining the lock means
3370 * tx_ring[0] is currently being cleaned anyway. */
3371 if (spin_trylock(&adapter->tx_queue_lock)) {
3372 tx_cleaned = e1000_clean_tx_irq(adapter,
3373 &adapter->tx_ring[0]);
3374 spin_unlock(&adapter->tx_queue_lock);
3377 tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3379 adapter->clean_rx(adapter, &adapter->rx_ring[i],
3380 &work_done, work_to_do);
3382 *budget -= work_done;
3383 poll_dev->quota -= work_done;
3385 /* If no Tx and not enough Rx work done, exit the polling mode */
3386 if ((!tx_cleaned && (work_done == 0)) ||
3387 !netif_running(adapter->netdev)) {
3389 netif_rx_complete(poll_dev);
3390 e1000_irq_enable(adapter);
3399 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3400 * @adapter: board private structure
3404 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3405 struct e1000_tx_ring *tx_ring)
3407 struct net_device *netdev = adapter->netdev;
3408 struct e1000_tx_desc *tx_desc, *eop_desc;
3409 struct e1000_buffer *buffer_info;
3410 unsigned int i, eop;
3411 boolean_t cleaned = FALSE;
3413 i = tx_ring->next_to_clean;
3414 eop = tx_ring->buffer_info[i].next_to_watch;
3415 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3417 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3418 for (cleaned = FALSE; !cleaned; ) {
3419 tx_desc = E1000_TX_DESC(*tx_ring, i);
3420 buffer_info = &tx_ring->buffer_info[i];
3421 cleaned = (i == eop);
3423 #ifdef CONFIG_E1000_MQ
3424 tx_ring->tx_stats.bytes += buffer_info->length;
3426 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3427 memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
3429 if (unlikely(++i == tx_ring->count)) i = 0;
3432 #ifdef CONFIG_E1000_MQ
3433 tx_ring->tx_stats.packets++;
3436 eop = tx_ring->buffer_info[i].next_to_watch;
3437 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3440 tx_ring->next_to_clean = i;
3442 spin_lock(&tx_ring->tx_lock);
3444 if (unlikely(cleaned && netif_queue_stopped(netdev) &&
3445 netif_carrier_ok(netdev)))
3446 netif_wake_queue(netdev);
3448 spin_unlock(&tx_ring->tx_lock);
3450 if (adapter->detect_tx_hung) {
3451 /* Detect a transmit hang in hardware, this serializes the
3452 * check with the clearing of time_stamp and movement of i */
3453 adapter->detect_tx_hung = FALSE;
3454 if (tx_ring->buffer_info[eop].dma &&
3455 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3456 adapter->tx_timeout_factor * HZ)
3457 && !(E1000_READ_REG(&adapter->hw, STATUS) &
3458 E1000_STATUS_TXOFF)) {
3460 /* detected Tx unit hang */
3461 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3465 " next_to_use <%x>\n"
3466 " next_to_clean <%x>\n"
3467 "buffer_info[next_to_clean]\n"
3468 " time_stamp <%lx>\n"
3469 " next_to_watch <%x>\n"
3471 " next_to_watch.status <%x>\n",
3472 (unsigned long)((tx_ring - adapter->tx_ring) /
3473 sizeof(struct e1000_tx_ring)),
3474 readl(adapter->hw.hw_addr + tx_ring->tdh),
3475 readl(adapter->hw.hw_addr + tx_ring->tdt),
3476 tx_ring->next_to_use,
3477 tx_ring->next_to_clean,
3478 tx_ring->buffer_info[eop].time_stamp,
3481 eop_desc->upper.fields.status);
3482 netif_stop_queue(netdev);
3489 * e1000_rx_checksum - Receive Checksum Offload for 82543
3490 * @adapter: board private structure
3491 * @status_err: receive descriptor status and error fields
3492 * @csum: receive descriptor csum field
3493 * @sk_buff: socket buffer with received data
3497 e1000_rx_checksum(struct e1000_adapter *adapter,
3498 uint32_t status_err, uint32_t csum,
3499 struct sk_buff *skb)
3501 uint16_t status = (uint16_t)status_err;
3502 uint8_t errors = (uint8_t)(status_err >> 24);
3503 skb->ip_summed = CHECKSUM_NONE;
3505 /* 82543 or newer only */
3506 if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
3507 /* Ignore Checksum bit is set */
3508 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3509 /* TCP/UDP checksum error bit is set */
3510 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3511 /* let the stack verify checksum errors */
3512 adapter->hw_csum_err++;
3515 /* TCP/UDP Checksum has not been calculated */
3516 if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3517 if (!(status & E1000_RXD_STAT_TCPCS))
3520 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3523 /* It must be a TCP or UDP packet with a valid checksum */
3524 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3525 /* TCP checksum is good */
3526 skb->ip_summed = CHECKSUM_UNNECESSARY;
3527 } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3528 /* IP fragment with UDP payload */
3529 /* Hardware complements the payload checksum, so we undo it
3530 * and then put the value in host order for further stack use.
3532 csum = ntohl(csum ^ 0xFFFF);
3534 skb->ip_summed = CHECKSUM_HW;
3536 adapter->hw_csum_good++;
3540 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3541 * @adapter: board private structure
3545 #ifdef CONFIG_E1000_NAPI
3546 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3547 struct e1000_rx_ring *rx_ring,
3548 int *work_done, int work_to_do)
3550 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3551 struct e1000_rx_ring *rx_ring)
3554 struct net_device *netdev = adapter->netdev;
3555 struct pci_dev *pdev = adapter->pdev;
3556 struct e1000_rx_desc *rx_desc;
3557 struct e1000_buffer *buffer_info;
3558 unsigned long flags;
3562 int cleaned_count = 0;
3563 boolean_t cleaned = FALSE, multi_descriptor = FALSE;
3565 i = rx_ring->next_to_clean;
3566 rx_desc = E1000_RX_DESC(*rx_ring, i);
3567 buffer_info = &rx_ring->buffer_info[i];
3569 while (rx_desc->status & E1000_RXD_STAT_DD) {
3570 struct sk_buff *skb;
3572 #ifdef CONFIG_E1000_NAPI
3573 if (*work_done >= work_to_do)
3577 status = rx_desc->status;
3578 skb = buffer_info->skb;
3581 pci_unmap_single(pdev,
3583 buffer_info->length,
3584 PCI_DMA_FROMDEVICE);
3586 length = le16_to_cpu(rx_desc->length);
3588 skb_put(skb, length);
3590 if (!(status & E1000_RXD_STAT_EOP)) {
3591 if (!rx_ring->rx_skb_top) {
3592 rx_ring->rx_skb_top = skb;
3593 rx_ring->rx_skb_top->len = length;
3594 rx_ring->rx_skb_prev = skb;
3596 if (skb_shinfo(rx_ring->rx_skb_top)->frag_list) {
3597 rx_ring->rx_skb_prev->next = skb;
3598 skb->prev = rx_ring->rx_skb_prev;
3600 skb_shinfo(rx_ring->rx_skb_top)->frag_list = skb;
3602 rx_ring->rx_skb_prev = skb;
3603 rx_ring->rx_skb_top->data_len += length;
3607 if (rx_ring->rx_skb_top) {
3608 if (skb_shinfo(rx_ring->rx_skb_top)
3610 rx_ring->rx_skb_prev->next = skb;
3611 skb->prev = rx_ring->rx_skb_prev;
3613 skb_shinfo(rx_ring->rx_skb_top)
3616 rx_ring->rx_skb_top->data_len += length;
3617 rx_ring->rx_skb_top->len +=
3618 rx_ring->rx_skb_top->data_len;
3620 skb = rx_ring->rx_skb_top;
3621 multi_descriptor = TRUE;
3622 rx_ring->rx_skb_top = NULL;
3623 rx_ring->rx_skb_prev = NULL;
3627 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3628 last_byte = *(skb->data + length - 1);
3629 if (TBI_ACCEPT(&adapter->hw, status,
3630 rx_desc->errors, length, last_byte)) {
3631 spin_lock_irqsave(&adapter->stats_lock, flags);
3632 e1000_tbi_adjust_stats(&adapter->hw,
3635 spin_unlock_irqrestore(&adapter->stats_lock,
3639 dev_kfree_skb_irq(skb);
3644 /* code added for copybreak, this should improve
3645 * performance for small packets with large amounts
3646 * of reassembly being done in the stack */
3647 #define E1000_CB_LENGTH 256
3648 if ((length < E1000_CB_LENGTH) &&
3649 !rx_ring->rx_skb_top &&
3650 /* or maybe (status & E1000_RXD_STAT_EOP) && */
3651 !multi_descriptor) {
3652 struct sk_buff *new_skb =
3653 dev_alloc_skb(length + NET_IP_ALIGN);
3655 skb_reserve(new_skb, NET_IP_ALIGN);
3656 new_skb->dev = netdev;
3657 memcpy(new_skb->data - NET_IP_ALIGN,
3658 skb->data - NET_IP_ALIGN,
3659 length + NET_IP_ALIGN);
3660 /* save the skb in buffer_info as good */
3661 buffer_info->skb = skb;
3663 skb_put(skb, length);
3667 /* end copybreak code */
3669 /* Receive Checksum Offload */
3670 e1000_rx_checksum(adapter,
3671 (uint32_t)(status) |
3672 ((uint32_t)(rx_desc->errors) << 24),
3673 rx_desc->csum, skb);
3675 skb->protocol = eth_type_trans(skb, netdev);
3676 #ifdef CONFIG_E1000_NAPI
3677 if (unlikely(adapter->vlgrp &&
3678 (status & E1000_RXD_STAT_VP))) {
3679 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3680 le16_to_cpu(rx_desc->special) &
3681 E1000_RXD_SPC_VLAN_MASK);
3683 netif_receive_skb(skb);
3685 #else /* CONFIG_E1000_NAPI */
3686 if (unlikely(adapter->vlgrp &&
3687 (status & E1000_RXD_STAT_VP))) {
3688 vlan_hwaccel_rx(skb, adapter->vlgrp,
3689 le16_to_cpu(rx_desc->special) &
3690 E1000_RXD_SPC_VLAN_MASK);
3694 #endif /* CONFIG_E1000_NAPI */
3695 netdev->last_rx = jiffies;
3696 #ifdef CONFIG_E1000_MQ
3697 rx_ring->rx_stats.packets++;
3698 rx_ring->rx_stats.bytes += length;
3702 rx_desc->status = 0;
3704 /* return some buffers to hardware, one at a time is too slow */
3705 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3706 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3711 rx_ring->next_to_clean = i;
3713 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3715 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3721 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3722 * @adapter: board private structure
3726 #ifdef CONFIG_E1000_NAPI
3727 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3728 struct e1000_rx_ring *rx_ring,
3729 int *work_done, int work_to_do)
3731 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3732 struct e1000_rx_ring *rx_ring)
3735 union e1000_rx_desc_packet_split *rx_desc;
3736 struct net_device *netdev = adapter->netdev;
3737 struct pci_dev *pdev = adapter->pdev;
3738 struct e1000_buffer *buffer_info;
3739 struct e1000_ps_page *ps_page;
3740 struct e1000_ps_page_dma *ps_page_dma;
3741 struct sk_buff *skb;
3743 uint32_t length, staterr;
3744 int cleaned_count = 0;
3745 boolean_t cleaned = FALSE;
3747 i = rx_ring->next_to_clean;
3748 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3749 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3751 while (staterr & E1000_RXD_STAT_DD) {
3752 buffer_info = &rx_ring->buffer_info[i];
3753 ps_page = &rx_ring->ps_page[i];
3754 ps_page_dma = &rx_ring->ps_page_dma[i];
3755 #ifdef CONFIG_E1000_NAPI
3756 if (unlikely(*work_done >= work_to_do))
3762 pci_unmap_single(pdev, buffer_info->dma,
3763 buffer_info->length,
3764 PCI_DMA_FROMDEVICE);
3766 skb = buffer_info->skb;
3768 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3769 E1000_DBG("%s: Packet Split buffers didn't pick up"
3770 " the full packet\n", netdev->name);
3771 dev_kfree_skb_irq(skb);
3775 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3776 dev_kfree_skb_irq(skb);
3780 length = le16_to_cpu(rx_desc->wb.middle.length0);
3782 if (unlikely(!length)) {
3783 E1000_DBG("%s: Last part of the packet spanning"
3784 " multiple descriptors\n", netdev->name);
3785 dev_kfree_skb_irq(skb);
3790 skb_put(skb, length);
3792 for (j = 0; j < adapter->rx_ps_pages; j++) {
3793 if (!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
3796 pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3797 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3798 ps_page_dma->ps_page_dma[j] = 0;
3799 skb_shinfo(skb)->frags[j].page =
3800 ps_page->ps_page[j];
3801 ps_page->ps_page[j] = NULL;
3802 skb_shinfo(skb)->frags[j].page_offset = 0;
3803 skb_shinfo(skb)->frags[j].size = length;
3804 skb_shinfo(skb)->nr_frags++;
3806 skb->data_len += length;
3809 e1000_rx_checksum(adapter, staterr,
3810 rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3811 skb->protocol = eth_type_trans(skb, netdev);
3813 if (likely(rx_desc->wb.upper.header_status &
3814 E1000_RXDPS_HDRSTAT_HDRSP))
3815 adapter->rx_hdr_split++;
3816 #ifdef CONFIG_E1000_NAPI
3817 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3818 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3819 le16_to_cpu(rx_desc->wb.middle.vlan) &
3820 E1000_RXD_SPC_VLAN_MASK);
3822 netif_receive_skb(skb);
3824 #else /* CONFIG_E1000_NAPI */
3825 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3826 vlan_hwaccel_rx(skb, adapter->vlgrp,
3827 le16_to_cpu(rx_desc->wb.middle.vlan) &
3828 E1000_RXD_SPC_VLAN_MASK);
3832 #endif /* CONFIG_E1000_NAPI */
3833 netdev->last_rx = jiffies;
3834 #ifdef CONFIG_E1000_MQ
3835 rx_ring->rx_stats.packets++;
3836 rx_ring->rx_stats.bytes += length;
3840 rx_desc->wb.middle.status_error &= ~0xFF;
3841 buffer_info->skb = NULL;
3843 /* return some buffers to hardware, one at a time is too slow */
3844 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3845 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3849 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3851 rx_ring->next_to_clean = i;
3853 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3855 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3861 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3862 * @adapter: address of board private structure
3866 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3867 struct e1000_rx_ring *rx_ring,
3870 struct net_device *netdev = adapter->netdev;
3871 struct pci_dev *pdev = adapter->pdev;
3872 struct e1000_rx_desc *rx_desc;
3873 struct e1000_buffer *buffer_info;
3874 struct sk_buff *skb;
3876 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3878 i = rx_ring->next_to_use;
3879 buffer_info = &rx_ring->buffer_info[i];
3881 while (cleaned_count--) {
3882 if (!(skb = buffer_info->skb))
3883 skb = dev_alloc_skb(bufsz);
3890 if (unlikely(!skb)) {
3891 /* Better luck next round */
3892 adapter->alloc_rx_buff_failed++;
3896 /* Fix for errata 23, can't cross 64kB boundary */
3897 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3898 struct sk_buff *oldskb = skb;
3899 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3900 "at %p\n", bufsz, skb->data);
3901 /* Try again, without freeing the previous */
3902 skb = dev_alloc_skb(bufsz);
3903 /* Failed allocation, critical failure */
3905 dev_kfree_skb(oldskb);
3909 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3912 dev_kfree_skb(oldskb);
3913 break; /* while !buffer_info->skb */
3915 /* Use new allocation */
3916 dev_kfree_skb(oldskb);
3919 /* Make buffer alignment 2 beyond a 16 byte boundary
3920 * this will result in a 16 byte aligned IP header after
3921 * the 14 byte MAC header is removed
3923 skb_reserve(skb, NET_IP_ALIGN);
3927 buffer_info->skb = skb;
3928 buffer_info->length = adapter->rx_buffer_len;
3930 buffer_info->dma = pci_map_single(pdev,
3932 adapter->rx_buffer_len,
3933 PCI_DMA_FROMDEVICE);
3935 /* Fix for errata 23, can't cross 64kB boundary */
3936 if (!e1000_check_64k_bound(adapter,
3937 (void *)(unsigned long)buffer_info->dma,
3938 adapter->rx_buffer_len)) {
3939 DPRINTK(RX_ERR, ERR,
3940 "dma align check failed: %u bytes at %p\n",
3941 adapter->rx_buffer_len,
3942 (void *)(unsigned long)buffer_info->dma);
3944 buffer_info->skb = NULL;
3946 pci_unmap_single(pdev, buffer_info->dma,
3947 adapter->rx_buffer_len,
3948 PCI_DMA_FROMDEVICE);
3950 break; /* while !buffer_info->skb */
3952 rx_desc = E1000_RX_DESC(*rx_ring, i);
3953 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3955 if (unlikely(++i == rx_ring->count))
3957 buffer_info = &rx_ring->buffer_info[i];
3960 if (likely(rx_ring->next_to_use != i)) {
3961 rx_ring->next_to_use = i;
3962 if (unlikely(i-- == 0))
3963 i = (rx_ring->count - 1);
3965 /* Force memory writes to complete before letting h/w
3966 * know there are new descriptors to fetch. (Only
3967 * applicable for weak-ordered memory model archs,
3968 * such as IA-64). */
3970 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3975 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3976 * @adapter: address of board private structure
3980 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3981 struct e1000_rx_ring *rx_ring,
3984 struct net_device *netdev = adapter->netdev;
3985 struct pci_dev *pdev = adapter->pdev;
3986 union e1000_rx_desc_packet_split *rx_desc;
3987 struct e1000_buffer *buffer_info;
3988 struct e1000_ps_page *ps_page;
3989 struct e1000_ps_page_dma *ps_page_dma;
3990 struct sk_buff *skb;
3993 i = rx_ring->next_to_use;
3994 buffer_info = &rx_ring->buffer_info[i];
3995 ps_page = &rx_ring->ps_page[i];
3996 ps_page_dma = &rx_ring->ps_page_dma[i];
3998 while (cleaned_count--) {
3999 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4001 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4002 if (j < adapter->rx_ps_pages) {
4003 if (likely(!ps_page->ps_page[j])) {
4004 ps_page->ps_page[j] =
4005 alloc_page(GFP_ATOMIC);
4006 if (unlikely(!ps_page->ps_page[j])) {
4007 adapter->alloc_rx_buff_failed++;
4010 ps_page_dma->ps_page_dma[j] =
4012 ps_page->ps_page[j],
4014 PCI_DMA_FROMDEVICE);
4016 /* Refresh the desc even if buffer_addrs didn't
4017 * change because each write-back erases
4020 rx_desc->read.buffer_addr[j+1] =
4021 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4023 rx_desc->read.buffer_addr[j+1] = ~0;
4026 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4028 if (unlikely(!skb)) {
4029 adapter->alloc_rx_buff_failed++;
4033 /* Make buffer alignment 2 beyond a 16 byte boundary
4034 * this will result in a 16 byte aligned IP header after
4035 * the 14 byte MAC header is removed
4037 skb_reserve(skb, NET_IP_ALIGN);
4041 buffer_info->skb = skb;
4042 buffer_info->length = adapter->rx_ps_bsize0;
4043 buffer_info->dma = pci_map_single(pdev, skb->data,
4044 adapter->rx_ps_bsize0,
4045 PCI_DMA_FROMDEVICE);
4047 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4049 if (unlikely(++i == rx_ring->count)) i = 0;
4050 buffer_info = &rx_ring->buffer_info[i];
4051 ps_page = &rx_ring->ps_page[i];
4052 ps_page_dma = &rx_ring->ps_page_dma[i];
4056 if (likely(rx_ring->next_to_use != i)) {
4057 rx_ring->next_to_use = i;
4058 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4060 /* Force memory writes to complete before letting h/w
4061 * know there are new descriptors to fetch. (Only
4062 * applicable for weak-ordered memory model archs,
4063 * such as IA-64). */
4065 /* Hardware increments by 16 bytes, but packet split
4066 * descriptors are 32 bytes...so we increment tail
4069 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4074 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4079 e1000_smartspeed(struct e1000_adapter *adapter)
4081 uint16_t phy_status;
4084 if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4085 !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4088 if (adapter->smartspeed == 0) {
4089 /* If Master/Slave config fault is asserted twice,
4090 * we assume back-to-back */
4091 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4092 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
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_CTRL, &phy_ctrl);
4096 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4097 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4098 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4100 adapter->smartspeed++;
4101 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4102 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4104 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4105 MII_CR_RESTART_AUTO_NEG);
4106 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4111 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4112 /* If still no link, perhaps using 2/3 pair cable */
4113 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4114 phy_ctrl |= CR_1000T_MS_ENABLE;
4115 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4116 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4117 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4118 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4119 MII_CR_RESTART_AUTO_NEG);
4120 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4123 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4124 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4125 adapter->smartspeed = 0;
4136 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4142 return e1000_mii_ioctl(netdev, ifr, cmd);
4156 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4158 struct e1000_adapter *adapter = netdev_priv(netdev);
4159 struct mii_ioctl_data *data = if_mii(ifr);
4163 unsigned long flags;
4165 if (adapter->hw.media_type != e1000_media_type_copper)
4170 data->phy_id = adapter->hw.phy_addr;
4173 if (!capable(CAP_NET_ADMIN))
4175 spin_lock_irqsave(&adapter->stats_lock, flags);
4176 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4178 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4181 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4184 if (!capable(CAP_NET_ADMIN))
4186 if (data->reg_num & ~(0x1F))
4188 mii_reg = data->val_in;
4189 spin_lock_irqsave(&adapter->stats_lock, flags);
4190 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4192 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4195 if (adapter->hw.phy_type == e1000_phy_m88) {
4196 switch (data->reg_num) {
4198 if (mii_reg & MII_CR_POWER_DOWN)
4200 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4201 adapter->hw.autoneg = 1;
4202 adapter->hw.autoneg_advertised = 0x2F;
4205 spddplx = SPEED_1000;
4206 else if (mii_reg & 0x2000)
4207 spddplx = SPEED_100;
4210 spddplx += (mii_reg & 0x100)
4213 retval = e1000_set_spd_dplx(adapter,
4216 spin_unlock_irqrestore(
4217 &adapter->stats_lock,
4222 if (netif_running(adapter->netdev)) {
4223 e1000_down(adapter);
4226 e1000_reset(adapter);
4228 case M88E1000_PHY_SPEC_CTRL:
4229 case M88E1000_EXT_PHY_SPEC_CTRL:
4230 if (e1000_phy_reset(&adapter->hw)) {
4231 spin_unlock_irqrestore(
4232 &adapter->stats_lock, flags);
4238 switch (data->reg_num) {
4240 if (mii_reg & MII_CR_POWER_DOWN)
4242 if (netif_running(adapter->netdev)) {
4243 e1000_down(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 /* these functions save and restore 16 or 64 dwords (64-256 bytes) of config
4443 * space versus the 64 bytes that pci_[save|restore]_state handle
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;
4453 if (adapter->hw.mac_type >= e1000_82571)
4454 size = PCIE_CONFIG_SPACE_LEN;
4456 size = PCI_CONFIG_SPACE_LEN;
4458 WARN_ON(adapter->config_space != NULL);
4460 adapter->config_space = kmalloc(size, GFP_KERNEL);
4461 if (!adapter->config_space) {
4462 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4465 for (i = 0; i < (size / 4); i++)
4466 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4471 e1000_pci_restore_state(struct e1000_adapter *adapter)
4473 struct pci_dev *dev = adapter->pdev;
4476 if (adapter->config_space == NULL)
4478 if (adapter->hw.mac_type >= e1000_82571)
4479 size = PCIE_CONFIG_SPACE_LEN;
4481 size = PCI_CONFIG_SPACE_LEN;
4482 for (i = 0; i < (size / 4); i++)
4483 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4484 kfree(adapter->config_space);
4485 adapter->config_space = NULL;
4488 #endif /* CONFIG_PM */
4491 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4493 struct net_device *netdev = pci_get_drvdata(pdev);
4494 struct e1000_adapter *adapter = netdev_priv(netdev);
4495 uint32_t ctrl, ctrl_ext, rctl, manc, status;
4496 uint32_t wufc = adapter->wol;
4499 netif_device_detach(netdev);
4501 if (netif_running(netdev))
4502 e1000_down(adapter);
4505 /* implement our own version of pci_save_state(pdev) because pci
4506 * express adapters have larger 256 byte config spaces */
4507 retval = e1000_pci_save_state(adapter);
4512 status = E1000_READ_REG(&adapter->hw, STATUS);
4513 if (status & E1000_STATUS_LU)
4514 wufc &= ~E1000_WUFC_LNKC;
4517 e1000_setup_rctl(adapter);
4518 e1000_set_multi(netdev);
4520 /* turn on all-multi mode if wake on multicast is enabled */
4521 if (adapter->wol & E1000_WUFC_MC) {
4522 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4523 rctl |= E1000_RCTL_MPE;
4524 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4527 if (adapter->hw.mac_type >= e1000_82540) {
4528 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4529 /* advertise wake from D3Cold */
4530 #define E1000_CTRL_ADVD3WUC 0x00100000
4531 /* phy power management enable */
4532 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4533 ctrl |= E1000_CTRL_ADVD3WUC |
4534 E1000_CTRL_EN_PHY_PWR_MGMT;
4535 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4538 if (adapter->hw.media_type == e1000_media_type_fiber ||
4539 adapter->hw.media_type == e1000_media_type_internal_serdes) {
4540 /* keep the laser running in D3 */
4541 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4542 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4543 E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4546 /* Allow time for pending master requests to run */
4547 e1000_disable_pciex_master(&adapter->hw);
4549 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4550 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4551 retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4553 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4554 retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4556 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4558 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4559 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4560 retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4562 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4563 retval = pci_enable_wake(pdev, PCI_D3cold, 0); /* 4 == D3 cold */
4565 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4568 if (adapter->hw.mac_type >= e1000_82540 &&
4569 adapter->hw.media_type == e1000_media_type_copper) {
4570 manc = E1000_READ_REG(&adapter->hw, MANC);
4571 if (manc & E1000_MANC_SMBUS_EN) {
4572 manc |= E1000_MANC_ARP_EN;
4573 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4574 retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4576 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4577 retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4579 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4583 /* Release control of h/w to f/w. If f/w is AMT enabled, this
4584 * would have already happened in close and is redundant. */
4585 e1000_release_hw_control(adapter);
4587 pci_disable_device(pdev);
4589 retval = pci_set_power_state(pdev, pci_choose_state(pdev, state));
4591 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4598 e1000_resume(struct pci_dev *pdev)
4600 struct net_device *netdev = pci_get_drvdata(pdev);
4601 struct e1000_adapter *adapter = netdev_priv(netdev);
4603 uint32_t manc, ret_val;
4605 retval = pci_set_power_state(pdev, PCI_D0);
4607 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4608 e1000_pci_restore_state(adapter);
4609 ret_val = pci_enable_device(pdev);
4610 pci_set_master(pdev);
4612 retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4614 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4615 retval = pci_enable_wake(pdev, PCI_D3cold, 0);
4617 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4619 e1000_reset(adapter);
4620 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4622 if (netif_running(netdev))
4625 netif_device_attach(netdev);
4627 if (adapter->hw.mac_type >= e1000_82540 &&
4628 adapter->hw.media_type == e1000_media_type_copper) {
4629 manc = E1000_READ_REG(&adapter->hw, MANC);
4630 manc &= ~(E1000_MANC_ARP_EN);
4631 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4634 /* If the controller is 82573 and f/w is AMT, do not set
4635 * DRV_LOAD until the interface is up. For all other cases,
4636 * let the f/w know that the h/w is now under the control
4638 if (adapter->hw.mac_type != e1000_82573 ||
4639 !e1000_check_mng_mode(&adapter->hw))
4640 e1000_get_hw_control(adapter);
4645 #ifdef CONFIG_NET_POLL_CONTROLLER
4647 * Polling 'interrupt' - used by things like netconsole to send skbs
4648 * without having to re-enable interrupts. It's not called while
4649 * the interrupt routine is executing.
4652 e1000_netpoll(struct net_device *netdev)
4654 struct e1000_adapter *adapter = netdev_priv(netdev);
4655 disable_irq(adapter->pdev->irq);
4656 e1000_intr(adapter->pdev->irq, netdev, NULL);
4657 e1000_clean_tx_irq(adapter, adapter->tx_ring);
4658 #ifndef CONFIG_E1000_NAPI
4659 adapter->clean_rx(adapter, adapter->rx_ring);
4661 enable_irq(adapter->pdev->irq);