1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
30 #include <net/ip6_checksum.h>
32 char e1000_driver_name[] = "e1000";
33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
34 #ifndef CONFIG_E1000_NAPI
37 #define DRIVERNAPI "-NAPI"
39 #define DRV_VERSION "7.3.20-k2"DRIVERNAPI
40 const char e1000_driver_version[] = DRV_VERSION;
41 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
43 /* e1000_pci_tbl - PCI Device ID Table
45 * Last entry must be all 0s
48 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
50 static struct pci_device_id e1000_pci_tbl[] = {
51 INTEL_E1000_ETHERNET_DEVICE(0x1000),
52 INTEL_E1000_ETHERNET_DEVICE(0x1001),
53 INTEL_E1000_ETHERNET_DEVICE(0x1004),
54 INTEL_E1000_ETHERNET_DEVICE(0x1008),
55 INTEL_E1000_ETHERNET_DEVICE(0x1009),
56 INTEL_E1000_ETHERNET_DEVICE(0x100C),
57 INTEL_E1000_ETHERNET_DEVICE(0x100D),
58 INTEL_E1000_ETHERNET_DEVICE(0x100E),
59 INTEL_E1000_ETHERNET_DEVICE(0x100F),
60 INTEL_E1000_ETHERNET_DEVICE(0x1010),
61 INTEL_E1000_ETHERNET_DEVICE(0x1011),
62 INTEL_E1000_ETHERNET_DEVICE(0x1012),
63 INTEL_E1000_ETHERNET_DEVICE(0x1013),
64 INTEL_E1000_ETHERNET_DEVICE(0x1014),
65 INTEL_E1000_ETHERNET_DEVICE(0x1015),
66 INTEL_E1000_ETHERNET_DEVICE(0x1016),
67 INTEL_E1000_ETHERNET_DEVICE(0x1017),
68 INTEL_E1000_ETHERNET_DEVICE(0x1018),
69 INTEL_E1000_ETHERNET_DEVICE(0x1019),
70 INTEL_E1000_ETHERNET_DEVICE(0x101A),
71 INTEL_E1000_ETHERNET_DEVICE(0x101D),
72 INTEL_E1000_ETHERNET_DEVICE(0x101E),
73 INTEL_E1000_ETHERNET_DEVICE(0x1026),
74 INTEL_E1000_ETHERNET_DEVICE(0x1027),
75 INTEL_E1000_ETHERNET_DEVICE(0x1028),
76 INTEL_E1000_ETHERNET_DEVICE(0x1075),
77 INTEL_E1000_ETHERNET_DEVICE(0x1076),
78 INTEL_E1000_ETHERNET_DEVICE(0x1077),
79 INTEL_E1000_ETHERNET_DEVICE(0x1078),
80 INTEL_E1000_ETHERNET_DEVICE(0x1079),
81 INTEL_E1000_ETHERNET_DEVICE(0x107A),
82 INTEL_E1000_ETHERNET_DEVICE(0x107B),
83 INTEL_E1000_ETHERNET_DEVICE(0x107C),
84 INTEL_E1000_ETHERNET_DEVICE(0x108A),
85 INTEL_E1000_ETHERNET_DEVICE(0x1099),
86 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
87 /* required last entry */
91 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
93 int e1000_up(struct e1000_adapter *adapter);
94 void e1000_down(struct e1000_adapter *adapter);
95 void e1000_reinit_locked(struct e1000_adapter *adapter);
96 void e1000_reset(struct e1000_adapter *adapter);
97 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx);
98 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
99 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
100 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
101 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
102 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
103 struct e1000_tx_ring *txdr);
104 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
105 struct e1000_rx_ring *rxdr);
106 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
107 struct e1000_tx_ring *tx_ring);
108 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
109 struct e1000_rx_ring *rx_ring);
110 void e1000_update_stats(struct e1000_adapter *adapter);
112 static int e1000_init_module(void);
113 static void e1000_exit_module(void);
114 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
115 static void __devexit e1000_remove(struct pci_dev *pdev);
116 static int e1000_alloc_queues(struct e1000_adapter *adapter);
117 static int e1000_sw_init(struct e1000_adapter *adapter);
118 static int e1000_open(struct net_device *netdev);
119 static int e1000_close(struct net_device *netdev);
120 static void e1000_configure_tx(struct e1000_adapter *adapter);
121 static void e1000_configure_rx(struct e1000_adapter *adapter);
122 static void e1000_setup_rctl(struct e1000_adapter *adapter);
123 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
124 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
125 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
126 struct e1000_tx_ring *tx_ring);
127 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
128 struct e1000_rx_ring *rx_ring);
129 static void e1000_set_rx_mode(struct net_device *netdev);
130 static void e1000_update_phy_info(unsigned long data);
131 static void e1000_watchdog(unsigned long data);
132 static void e1000_82547_tx_fifo_stall(unsigned long data);
133 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
134 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
135 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
136 static int e1000_set_mac(struct net_device *netdev, void *p);
137 static irqreturn_t e1000_intr(int irq, void *data);
138 static irqreturn_t e1000_intr_msi(int irq, void *data);
139 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
140 struct e1000_tx_ring *tx_ring);
141 #ifdef CONFIG_E1000_NAPI
142 static int e1000_clean(struct napi_struct *napi, int budget);
143 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
144 struct e1000_rx_ring *rx_ring,
145 int *work_done, int work_to_do);
146 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
147 struct e1000_rx_ring *rx_ring,
148 int *work_done, int work_to_do);
150 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
151 struct e1000_rx_ring *rx_ring);
152 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
153 struct e1000_rx_ring *rx_ring);
155 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
156 struct e1000_rx_ring *rx_ring,
158 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
159 struct e1000_rx_ring *rx_ring,
161 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
162 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
164 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
165 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
166 static void e1000_tx_timeout(struct net_device *dev);
167 static void e1000_reset_task(struct work_struct *work);
168 static void e1000_smartspeed(struct e1000_adapter *adapter);
169 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
170 struct sk_buff *skb);
172 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
173 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
174 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
175 static void e1000_restore_vlan(struct e1000_adapter *adapter);
177 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
179 static int e1000_resume(struct pci_dev *pdev);
181 static void e1000_shutdown(struct pci_dev *pdev);
183 #ifdef CONFIG_NET_POLL_CONTROLLER
184 /* for netdump / net console */
185 static void e1000_netpoll (struct net_device *netdev);
188 #define COPYBREAK_DEFAULT 256
189 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
190 module_param(copybreak, uint, 0644);
191 MODULE_PARM_DESC(copybreak,
192 "Maximum size of packet that is copied to a new buffer on receive");
194 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
195 pci_channel_state_t state);
196 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
197 static void e1000_io_resume(struct pci_dev *pdev);
199 static struct pci_error_handlers e1000_err_handler = {
200 .error_detected = e1000_io_error_detected,
201 .slot_reset = e1000_io_slot_reset,
202 .resume = e1000_io_resume,
205 static struct pci_driver e1000_driver = {
206 .name = e1000_driver_name,
207 .id_table = e1000_pci_tbl,
208 .probe = e1000_probe,
209 .remove = __devexit_p(e1000_remove),
211 /* Power Managment Hooks */
212 .suspend = e1000_suspend,
213 .resume = e1000_resume,
215 .shutdown = e1000_shutdown,
216 .err_handler = &e1000_err_handler
219 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
220 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
221 MODULE_LICENSE("GPL");
222 MODULE_VERSION(DRV_VERSION);
224 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
225 module_param(debug, int, 0);
226 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
229 * e1000_init_module - Driver Registration Routine
231 * e1000_init_module is the first routine called when the driver is
232 * loaded. All it does is register with the PCI subsystem.
235 static int __init e1000_init_module(void)
238 printk(KERN_INFO "%s - version %s\n",
239 e1000_driver_string, e1000_driver_version);
241 printk(KERN_INFO "%s\n", e1000_copyright);
243 ret = pci_register_driver(&e1000_driver);
244 if (copybreak != COPYBREAK_DEFAULT) {
246 printk(KERN_INFO "e1000: copybreak disabled\n");
248 printk(KERN_INFO "e1000: copybreak enabled for "
249 "packets <= %u bytes\n", copybreak);
254 module_init(e1000_init_module);
257 * e1000_exit_module - Driver Exit Cleanup Routine
259 * e1000_exit_module is called just before the driver is removed
263 static void __exit e1000_exit_module(void)
265 pci_unregister_driver(&e1000_driver);
268 module_exit(e1000_exit_module);
270 static int e1000_request_irq(struct e1000_adapter *adapter)
272 struct e1000_hw *hw = &adapter->hw;
273 struct net_device *netdev = adapter->netdev;
274 irq_handler_t handler = e1000_intr;
275 int irq_flags = IRQF_SHARED;
278 if (hw->mac_type >= e1000_82571) {
279 adapter->have_msi = !pci_enable_msi(adapter->pdev);
280 if (adapter->have_msi) {
281 handler = e1000_intr_msi;
286 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
289 if (adapter->have_msi)
290 pci_disable_msi(adapter->pdev);
292 "Unable to allocate interrupt Error: %d\n", err);
298 static void e1000_free_irq(struct e1000_adapter *adapter)
300 struct net_device *netdev = adapter->netdev;
302 free_irq(adapter->pdev->irq, netdev);
304 if (adapter->have_msi)
305 pci_disable_msi(adapter->pdev);
309 * e1000_irq_disable - Mask off interrupt generation on the NIC
310 * @adapter: board private structure
313 static void e1000_irq_disable(struct e1000_adapter *adapter)
315 struct e1000_hw *hw = &adapter->hw;
319 synchronize_irq(adapter->pdev->irq);
323 * e1000_irq_enable - Enable default interrupt generation settings
324 * @adapter: board private structure
327 static void e1000_irq_enable(struct e1000_adapter *adapter)
329 struct e1000_hw *hw = &adapter->hw;
331 ew32(IMS, IMS_ENABLE_MASK);
335 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
337 struct e1000_hw *hw = &adapter->hw;
338 struct net_device *netdev = adapter->netdev;
339 u16 vid = hw->mng_cookie.vlan_id;
340 u16 old_vid = adapter->mng_vlan_id;
341 if (adapter->vlgrp) {
342 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
343 if (hw->mng_cookie.status &
344 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
345 e1000_vlan_rx_add_vid(netdev, vid);
346 adapter->mng_vlan_id = vid;
348 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
350 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
352 !vlan_group_get_device(adapter->vlgrp, old_vid))
353 e1000_vlan_rx_kill_vid(netdev, old_vid);
355 adapter->mng_vlan_id = vid;
360 * e1000_release_hw_control - release control of the h/w to f/w
361 * @adapter: address of board private structure
363 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
364 * For ASF and Pass Through versions of f/w this means that the
365 * driver is no longer loaded. For AMT version (only with 82573) i
366 * of the f/w this means that the network i/f is closed.
370 static void e1000_release_hw_control(struct e1000_adapter *adapter)
374 struct e1000_hw *hw = &adapter->hw;
376 /* Let firmware taken over control of h/w */
377 switch (hw->mac_type) {
380 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
384 case e1000_80003es2lan:
386 ctrl_ext = er32(CTRL_EXT);
387 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
395 * e1000_get_hw_control - get control of the h/w from f/w
396 * @adapter: address of board private structure
398 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
399 * For ASF and Pass Through versions of f/w this means that
400 * the driver is loaded. For AMT version (only with 82573)
401 * of the f/w this means that the network i/f is open.
405 static void e1000_get_hw_control(struct e1000_adapter *adapter)
409 struct e1000_hw *hw = &adapter->hw;
411 /* Let firmware know the driver has taken over */
412 switch (hw->mac_type) {
415 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
419 case e1000_80003es2lan:
421 ctrl_ext = er32(CTRL_EXT);
422 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
429 static void e1000_init_manageability(struct e1000_adapter *adapter)
431 struct e1000_hw *hw = &adapter->hw;
433 if (adapter->en_mng_pt) {
434 u32 manc = er32(MANC);
436 /* disable hardware interception of ARP */
437 manc &= ~(E1000_MANC_ARP_EN);
439 /* enable receiving management packets to the host */
440 /* this will probably generate destination unreachable messages
441 * from the host OS, but the packets will be handled on SMBUS */
442 if (hw->has_manc2h) {
443 u32 manc2h = er32(MANC2H);
445 manc |= E1000_MANC_EN_MNG2HOST;
446 #define E1000_MNG2HOST_PORT_623 (1 << 5)
447 #define E1000_MNG2HOST_PORT_664 (1 << 6)
448 manc2h |= E1000_MNG2HOST_PORT_623;
449 manc2h |= E1000_MNG2HOST_PORT_664;
450 ew32(MANC2H, manc2h);
457 static void e1000_release_manageability(struct e1000_adapter *adapter)
459 struct e1000_hw *hw = &adapter->hw;
461 if (adapter->en_mng_pt) {
462 u32 manc = er32(MANC);
464 /* re-enable hardware interception of ARP */
465 manc |= E1000_MANC_ARP_EN;
468 manc &= ~E1000_MANC_EN_MNG2HOST;
470 /* don't explicitly have to mess with MANC2H since
471 * MANC has an enable disable that gates MANC2H */
478 * e1000_configure - configure the hardware for RX and TX
479 * @adapter = private board structure
481 static void e1000_configure(struct e1000_adapter *adapter)
483 struct net_device *netdev = adapter->netdev;
486 e1000_set_rx_mode(netdev);
488 e1000_restore_vlan(adapter);
489 e1000_init_manageability(adapter);
491 e1000_configure_tx(adapter);
492 e1000_setup_rctl(adapter);
493 e1000_configure_rx(adapter);
494 /* call E1000_DESC_UNUSED which always leaves
495 * at least 1 descriptor unused to make sure
496 * next_to_use != next_to_clean */
497 for (i = 0; i < adapter->num_rx_queues; i++) {
498 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
499 adapter->alloc_rx_buf(adapter, ring,
500 E1000_DESC_UNUSED(ring));
503 adapter->tx_queue_len = netdev->tx_queue_len;
506 int e1000_up(struct e1000_adapter *adapter)
508 struct e1000_hw *hw = &adapter->hw;
510 /* hardware has been reset, we need to reload some things */
511 e1000_configure(adapter);
513 clear_bit(__E1000_DOWN, &adapter->flags);
515 #ifdef CONFIG_E1000_NAPI
516 napi_enable(&adapter->napi);
518 e1000_irq_enable(adapter);
520 /* fire a link change interrupt to start the watchdog */
521 ew32(ICS, E1000_ICS_LSC);
526 * e1000_power_up_phy - restore link in case the phy was powered down
527 * @adapter: address of board private structure
529 * The phy may be powered down to save power and turn off link when the
530 * driver is unloaded and wake on lan is not enabled (among others)
531 * *** this routine MUST be followed by a call to e1000_reset ***
535 void e1000_power_up_phy(struct e1000_adapter *adapter)
537 struct e1000_hw *hw = &adapter->hw;
540 /* Just clear the power down bit to wake the phy back up */
541 if (hw->media_type == e1000_media_type_copper) {
542 /* according to the manual, the phy will retain its
543 * settings across a power-down/up cycle */
544 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
545 mii_reg &= ~MII_CR_POWER_DOWN;
546 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
550 static void e1000_power_down_phy(struct e1000_adapter *adapter)
552 struct e1000_hw *hw = &adapter->hw;
554 /* Power down the PHY so no link is implied when interface is down *
555 * The PHY cannot be powered down if any of the following is true *
558 * (c) SoL/IDER session is active */
559 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
560 hw->media_type == e1000_media_type_copper) {
563 switch (hw->mac_type) {
566 case e1000_82545_rev_3:
568 case e1000_82546_rev_3:
570 case e1000_82541_rev_2:
572 case e1000_82547_rev_2:
573 if (er32(MANC) & E1000_MANC_SMBUS_EN)
579 case e1000_80003es2lan:
581 if (e1000_check_mng_mode(hw) ||
582 e1000_check_phy_reset_block(hw))
588 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
589 mii_reg |= MII_CR_POWER_DOWN;
590 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
597 void e1000_down(struct e1000_adapter *adapter)
599 struct net_device *netdev = adapter->netdev;
601 /* signal that we're down so the interrupt handler does not
602 * reschedule our watchdog timer */
603 set_bit(__E1000_DOWN, &adapter->flags);
605 #ifdef CONFIG_E1000_NAPI
606 napi_disable(&adapter->napi);
608 e1000_irq_disable(adapter);
610 del_timer_sync(&adapter->tx_fifo_stall_timer);
611 del_timer_sync(&adapter->watchdog_timer);
612 del_timer_sync(&adapter->phy_info_timer);
614 netdev->tx_queue_len = adapter->tx_queue_len;
615 adapter->link_speed = 0;
616 adapter->link_duplex = 0;
617 netif_carrier_off(netdev);
618 netif_stop_queue(netdev);
620 e1000_reset(adapter);
621 e1000_clean_all_tx_rings(adapter);
622 e1000_clean_all_rx_rings(adapter);
625 void e1000_reinit_locked(struct e1000_adapter *adapter)
627 WARN_ON(in_interrupt());
628 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
632 clear_bit(__E1000_RESETTING, &adapter->flags);
635 void e1000_reset(struct e1000_adapter *adapter)
637 struct e1000_hw *hw = &adapter->hw;
638 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
639 u16 fc_high_water_mark = E1000_FC_HIGH_DIFF;
640 bool legacy_pba_adjust = false;
642 /* Repartition Pba for greater than 9k mtu
643 * To take effect CTRL.RST is required.
646 switch (hw->mac_type) {
647 case e1000_82542_rev2_0:
648 case e1000_82542_rev2_1:
653 case e1000_82541_rev_2:
654 legacy_pba_adjust = true;
658 case e1000_82545_rev_3:
660 case e1000_82546_rev_3:
664 case e1000_82547_rev_2:
665 legacy_pba_adjust = true;
670 case e1000_80003es2lan:
678 case e1000_undefined:
683 if (legacy_pba_adjust) {
684 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
685 pba -= 8; /* allocate more FIFO for Tx */
687 if (hw->mac_type == e1000_82547) {
688 adapter->tx_fifo_head = 0;
689 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
690 adapter->tx_fifo_size =
691 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
692 atomic_set(&adapter->tx_fifo_stall, 0);
694 } else if (hw->max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
695 /* adjust PBA for jumbo frames */
698 /* To maintain wire speed transmits, the Tx FIFO should be
699 * large enough to accomodate two full transmit packets,
700 * rounded up to the next 1KB and expressed in KB. Likewise,
701 * the Rx FIFO should be large enough to accomodate at least
702 * one full receive packet and is similarly rounded up and
703 * expressed in KB. */
705 /* upper 16 bits has Tx packet buffer allocation size in KB */
706 tx_space = pba >> 16;
707 /* lower 16 bits has Rx packet buffer allocation size in KB */
709 /* don't include ethernet FCS because hardware appends/strips */
710 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
712 min_tx_space = min_rx_space;
714 min_tx_space = ALIGN(min_tx_space, 1024);
716 min_rx_space = ALIGN(min_rx_space, 1024);
719 /* If current Tx allocation is less than the min Tx FIFO size,
720 * and the min Tx FIFO size is less than the current Rx FIFO
721 * allocation, take space away from current Rx allocation */
722 if (tx_space < min_tx_space &&
723 ((min_tx_space - tx_space) < pba)) {
724 pba = pba - (min_tx_space - tx_space);
726 /* PCI/PCIx hardware has PBA alignment constraints */
727 switch (hw->mac_type) {
728 case e1000_82545 ... e1000_82546_rev_3:
729 pba &= ~(E1000_PBA_8K - 1);
735 /* if short on rx space, rx wins and must trump tx
736 * adjustment or use Early Receive if available */
737 if (pba < min_rx_space) {
738 switch (hw->mac_type) {
740 /* ERT enabled in e1000_configure_rx */
752 /* flow control settings */
753 /* Set the FC high water mark to 90% of the FIFO size.
754 * Required to clear last 3 LSB */
755 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
756 /* We can't use 90% on small FIFOs because the remainder
757 * would be less than 1 full frame. In this case, we size
758 * it to allow at least a full frame above the high water
760 if (pba < E1000_PBA_16K)
761 fc_high_water_mark = (pba * 1024) - 1600;
763 hw->fc_high_water = fc_high_water_mark;
764 hw->fc_low_water = fc_high_water_mark - 8;
765 if (hw->mac_type == e1000_80003es2lan)
766 hw->fc_pause_time = 0xFFFF;
768 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
770 hw->fc = hw->original_fc;
772 /* Allow time for pending master requests to run */
774 if (hw->mac_type >= e1000_82544)
777 if (e1000_init_hw(hw))
778 DPRINTK(PROBE, ERR, "Hardware Error\n");
779 e1000_update_mng_vlan(adapter);
781 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
782 if (hw->mac_type >= e1000_82544 &&
783 hw->mac_type <= e1000_82547_rev_2 &&
785 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
786 u32 ctrl = er32(CTRL);
787 /* clear phy power management bit if we are in gig only mode,
788 * which if enabled will attempt negotiation to 100Mb, which
789 * can cause a loss of link at power off or driver unload */
790 ctrl &= ~E1000_CTRL_SWDPIN3;
794 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
795 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
797 e1000_reset_adaptive(hw);
798 e1000_phy_get_info(hw, &adapter->phy_info);
800 if (!adapter->smart_power_down &&
801 (hw->mac_type == e1000_82571 ||
802 hw->mac_type == e1000_82572)) {
804 /* speed up time to link by disabling smart power down, ignore
805 * the return value of this function because there is nothing
806 * different we would do if it failed */
807 e1000_read_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT,
809 phy_data &= ~IGP02E1000_PM_SPD;
810 e1000_write_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT,
814 e1000_release_manageability(adapter);
818 * Dump the eeprom for users having checksum issues
820 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
822 struct net_device *netdev = adapter->netdev;
823 struct ethtool_eeprom eeprom;
824 const struct ethtool_ops *ops = netdev->ethtool_ops;
827 u16 csum_old, csum_new = 0;
829 eeprom.len = ops->get_eeprom_len(netdev);
832 data = kmalloc(eeprom.len, GFP_KERNEL);
834 printk(KERN_ERR "Unable to allocate memory to dump EEPROM"
839 ops->get_eeprom(netdev, &eeprom, data);
841 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
842 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
843 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
844 csum_new += data[i] + (data[i + 1] << 8);
845 csum_new = EEPROM_SUM - csum_new;
847 printk(KERN_ERR "/*********************/\n");
848 printk(KERN_ERR "Current EEPROM Checksum : 0x%04x\n", csum_old);
849 printk(KERN_ERR "Calculated : 0x%04x\n", csum_new);
851 printk(KERN_ERR "Offset Values\n");
852 printk(KERN_ERR "======== ======\n");
853 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
855 printk(KERN_ERR "Include this output when contacting your support "
857 printk(KERN_ERR "This is not a software error! Something bad "
858 "happened to your hardware or\n");
859 printk(KERN_ERR "EEPROM image. Ignoring this "
860 "problem could result in further problems,\n");
861 printk(KERN_ERR "possibly loss of data, corruption or system hangs!\n");
862 printk(KERN_ERR "The MAC Address will be reset to 00:00:00:00:00:00, "
863 "which is invalid\n");
864 printk(KERN_ERR "and requires you to set the proper MAC "
865 "address manually before continuing\n");
866 printk(KERN_ERR "to enable this network device.\n");
867 printk(KERN_ERR "Please inspect the EEPROM dump and report the issue "
868 "to your hardware vendor\n");
869 printk(KERN_ERR "or Intel Customer Support: linux-nics@intel.com\n");
870 printk(KERN_ERR "/*********************/\n");
876 * e1000_probe - Device Initialization Routine
877 * @pdev: PCI device information struct
878 * @ent: entry in e1000_pci_tbl
880 * Returns 0 on success, negative on failure
882 * e1000_probe initializes an adapter identified by a pci_dev structure.
883 * The OS initialization, configuring of the adapter private structure,
884 * and a hardware reset occur.
887 static int __devinit e1000_probe(struct pci_dev *pdev,
888 const struct pci_device_id *ent)
890 struct net_device *netdev;
891 struct e1000_adapter *adapter;
894 static int cards_found = 0;
895 static int global_quad_port_a = 0; /* global ksp3 port a indication */
896 int i, err, pci_using_dac;
898 u16 eeprom_apme_mask = E1000_EEPROM_APME;
899 DECLARE_MAC_BUF(mac);
901 if ((err = pci_enable_device(pdev)))
904 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
905 !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
908 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
909 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
910 E1000_ERR("No usable DMA configuration, aborting\n");
916 if ((err = pci_request_regions(pdev, e1000_driver_name)))
919 pci_set_master(pdev);
922 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
924 goto err_alloc_etherdev;
926 SET_NETDEV_DEV(netdev, &pdev->dev);
928 pci_set_drvdata(pdev, netdev);
929 adapter = netdev_priv(netdev);
930 adapter->netdev = netdev;
931 adapter->pdev = pdev;
932 adapter->msg_enable = (1 << debug) - 1;
938 hw->hw_addr = ioremap(pci_resource_start(pdev, BAR_0),
939 pci_resource_len(pdev, BAR_0));
943 for (i = BAR_1; i <= BAR_5; i++) {
944 if (pci_resource_len(pdev, i) == 0)
946 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
947 hw->io_base = pci_resource_start(pdev, i);
952 netdev->open = &e1000_open;
953 netdev->stop = &e1000_close;
954 netdev->hard_start_xmit = &e1000_xmit_frame;
955 netdev->get_stats = &e1000_get_stats;
956 netdev->set_rx_mode = &e1000_set_rx_mode;
957 netdev->set_mac_address = &e1000_set_mac;
958 netdev->change_mtu = &e1000_change_mtu;
959 netdev->do_ioctl = &e1000_ioctl;
960 e1000_set_ethtool_ops(netdev);
961 netdev->tx_timeout = &e1000_tx_timeout;
962 netdev->watchdog_timeo = 5 * HZ;
963 #ifdef CONFIG_E1000_NAPI
964 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
966 netdev->vlan_rx_register = e1000_vlan_rx_register;
967 netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
968 netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
969 #ifdef CONFIG_NET_POLL_CONTROLLER
970 netdev->poll_controller = e1000_netpoll;
972 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
974 adapter->bd_number = cards_found;
976 /* setup the private structure */
978 if ((err = e1000_sw_init(adapter)))
982 /* Flash BAR mapping must happen after e1000_sw_init
983 * because it depends on mac_type */
984 if ((hw->mac_type == e1000_ich8lan) &&
985 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
987 ioremap(pci_resource_start(pdev, 1),
988 pci_resource_len(pdev, 1));
989 if (!hw->flash_address)
993 if (e1000_check_phy_reset_block(hw))
994 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
996 if (hw->mac_type >= e1000_82543) {
997 netdev->features = NETIF_F_SG |
1000 NETIF_F_HW_VLAN_RX |
1001 NETIF_F_HW_VLAN_FILTER;
1002 if (hw->mac_type == e1000_ich8lan)
1003 netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1006 if ((hw->mac_type >= e1000_82544) &&
1007 (hw->mac_type != e1000_82547))
1008 netdev->features |= NETIF_F_TSO;
1010 if (hw->mac_type > e1000_82547_rev_2)
1011 netdev->features |= NETIF_F_TSO6;
1013 netdev->features |= NETIF_F_HIGHDMA;
1015 netdev->features |= NETIF_F_LLTX;
1017 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1019 /* initialize eeprom parameters */
1020 if (e1000_init_eeprom_params(hw)) {
1021 E1000_ERR("EEPROM initialization failed\n");
1025 /* before reading the EEPROM, reset the controller to
1026 * put the device in a known good starting state */
1030 /* make sure the EEPROM is good */
1031 if (e1000_validate_eeprom_checksum(hw) < 0) {
1032 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1033 e1000_dump_eeprom(adapter);
1035 * set MAC address to all zeroes to invalidate and temporary
1036 * disable this device for the user. This blocks regular
1037 * traffic while still permitting ethtool ioctls from reaching
1038 * the hardware as well as allowing the user to run the
1039 * interface after manually setting a hw addr using
1042 memset(hw->mac_addr, 0, netdev->addr_len);
1044 /* copy the MAC address out of the EEPROM */
1045 if (e1000_read_mac_addr(hw))
1046 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1048 /* don't block initalization here due to bad MAC address */
1049 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1050 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1052 if (!is_valid_ether_addr(netdev->perm_addr))
1053 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1055 e1000_get_bus_info(hw);
1057 init_timer(&adapter->tx_fifo_stall_timer);
1058 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1059 adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
1061 init_timer(&adapter->watchdog_timer);
1062 adapter->watchdog_timer.function = &e1000_watchdog;
1063 adapter->watchdog_timer.data = (unsigned long) adapter;
1065 init_timer(&adapter->phy_info_timer);
1066 adapter->phy_info_timer.function = &e1000_update_phy_info;
1067 adapter->phy_info_timer.data = (unsigned long) adapter;
1069 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1071 e1000_check_options(adapter);
1073 /* Initial Wake on LAN setting
1074 * If APM wake is enabled in the EEPROM,
1075 * enable the ACPI Magic Packet filter
1078 switch (hw->mac_type) {
1079 case e1000_82542_rev2_0:
1080 case e1000_82542_rev2_1:
1084 e1000_read_eeprom(hw,
1085 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1086 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1089 e1000_read_eeprom(hw,
1090 EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1091 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1094 case e1000_82546_rev_3:
1096 case e1000_80003es2lan:
1097 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1098 e1000_read_eeprom(hw,
1099 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1104 e1000_read_eeprom(hw,
1105 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1108 if (eeprom_data & eeprom_apme_mask)
1109 adapter->eeprom_wol |= E1000_WUFC_MAG;
1111 /* now that we have the eeprom settings, apply the special cases
1112 * where the eeprom may be wrong or the board simply won't support
1113 * wake on lan on a particular port */
1114 switch (pdev->device) {
1115 case E1000_DEV_ID_82546GB_PCIE:
1116 adapter->eeprom_wol = 0;
1118 case E1000_DEV_ID_82546EB_FIBER:
1119 case E1000_DEV_ID_82546GB_FIBER:
1120 case E1000_DEV_ID_82571EB_FIBER:
1121 /* Wake events only supported on port A for dual fiber
1122 * regardless of eeprom setting */
1123 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1124 adapter->eeprom_wol = 0;
1126 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1127 case E1000_DEV_ID_82571EB_QUAD_COPPER:
1128 case E1000_DEV_ID_82571EB_QUAD_FIBER:
1129 case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1130 case E1000_DEV_ID_82571PT_QUAD_COPPER:
1131 /* if quad port adapter, disable WoL on all but port A */
1132 if (global_quad_port_a != 0)
1133 adapter->eeprom_wol = 0;
1135 adapter->quad_port_a = 1;
1136 /* Reset for multiple quad port adapters */
1137 if (++global_quad_port_a == 4)
1138 global_quad_port_a = 0;
1142 /* initialize the wol settings based on the eeprom settings */
1143 adapter->wol = adapter->eeprom_wol;
1145 /* print bus type/speed/width info */
1146 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1147 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1148 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1149 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1150 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1151 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1152 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1153 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1154 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1155 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1156 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1159 printk("%s\n", print_mac(mac, netdev->dev_addr));
1161 if (hw->bus_type == e1000_bus_type_pci_express) {
1162 DPRINTK(PROBE, WARNING, "This device (id %04x:%04x) will no "
1163 "longer be supported by this driver in the future.\n",
1164 pdev->vendor, pdev->device);
1165 DPRINTK(PROBE, WARNING, "please use the \"e1000e\" "
1166 "driver instead.\n");
1169 /* reset the hardware with the new settings */
1170 e1000_reset(adapter);
1172 /* If the controller is 82573 and f/w is AMT, do not set
1173 * DRV_LOAD until the interface is up. For all other cases,
1174 * let the f/w know that the h/w is now under the control
1176 if (hw->mac_type != e1000_82573 ||
1177 !e1000_check_mng_mode(hw))
1178 e1000_get_hw_control(adapter);
1180 /* tell the stack to leave us alone until e1000_open() is called */
1181 netif_carrier_off(netdev);
1182 netif_stop_queue(netdev);
1184 strcpy(netdev->name, "eth%d");
1185 if ((err = register_netdev(netdev)))
1188 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1194 e1000_release_hw_control(adapter);
1196 if (!e1000_check_phy_reset_block(hw))
1197 e1000_phy_hw_reset(hw);
1199 if (hw->flash_address)
1200 iounmap(hw->flash_address);
1202 #ifdef CONFIG_E1000_NAPI
1203 for (i = 0; i < adapter->num_rx_queues; i++)
1204 dev_put(&adapter->polling_netdev[i]);
1207 kfree(adapter->tx_ring);
1208 kfree(adapter->rx_ring);
1209 #ifdef CONFIG_E1000_NAPI
1210 kfree(adapter->polling_netdev);
1213 iounmap(hw->hw_addr);
1215 free_netdev(netdev);
1217 pci_release_regions(pdev);
1220 pci_disable_device(pdev);
1225 * e1000_remove - Device Removal Routine
1226 * @pdev: PCI device information struct
1228 * e1000_remove is called by the PCI subsystem to alert the driver
1229 * that it should release a PCI device. The could be caused by a
1230 * Hot-Plug event, or because the driver is going to be removed from
1234 static void __devexit e1000_remove(struct pci_dev *pdev)
1236 struct net_device *netdev = pci_get_drvdata(pdev);
1237 struct e1000_adapter *adapter = netdev_priv(netdev);
1238 struct e1000_hw *hw = &adapter->hw;
1239 #ifdef CONFIG_E1000_NAPI
1243 cancel_work_sync(&adapter->reset_task);
1245 e1000_release_manageability(adapter);
1247 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1248 * would have already happened in close and is redundant. */
1249 e1000_release_hw_control(adapter);
1251 #ifdef CONFIG_E1000_NAPI
1252 for (i = 0; i < adapter->num_rx_queues; i++)
1253 dev_put(&adapter->polling_netdev[i]);
1256 unregister_netdev(netdev);
1258 if (!e1000_check_phy_reset_block(hw))
1259 e1000_phy_hw_reset(hw);
1261 kfree(adapter->tx_ring);
1262 kfree(adapter->rx_ring);
1263 #ifdef CONFIG_E1000_NAPI
1264 kfree(adapter->polling_netdev);
1267 iounmap(hw->hw_addr);
1268 if (hw->flash_address)
1269 iounmap(hw->flash_address);
1270 pci_release_regions(pdev);
1272 free_netdev(netdev);
1274 pci_disable_device(pdev);
1278 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1279 * @adapter: board private structure to initialize
1281 * e1000_sw_init initializes the Adapter private data structure.
1282 * Fields are initialized based on PCI device information and
1283 * OS network device settings (MTU size).
1286 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1288 struct e1000_hw *hw = &adapter->hw;
1289 struct net_device *netdev = adapter->netdev;
1290 struct pci_dev *pdev = adapter->pdev;
1291 #ifdef CONFIG_E1000_NAPI
1295 /* PCI config space info */
1297 hw->vendor_id = pdev->vendor;
1298 hw->device_id = pdev->device;
1299 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1300 hw->subsystem_id = pdev->subsystem_device;
1301 hw->revision_id = pdev->revision;
1303 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1305 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1306 adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1307 hw->max_frame_size = netdev->mtu +
1308 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1309 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1311 /* identify the MAC */
1313 if (e1000_set_mac_type(hw)) {
1314 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1318 switch (hw->mac_type) {
1323 case e1000_82541_rev_2:
1324 case e1000_82547_rev_2:
1325 hw->phy_init_script = 1;
1329 e1000_set_media_type(hw);
1331 hw->wait_autoneg_complete = false;
1332 hw->tbi_compatibility_en = true;
1333 hw->adaptive_ifs = true;
1335 /* Copper options */
1337 if (hw->media_type == e1000_media_type_copper) {
1338 hw->mdix = AUTO_ALL_MODES;
1339 hw->disable_polarity_correction = false;
1340 hw->master_slave = E1000_MASTER_SLAVE;
1343 adapter->num_tx_queues = 1;
1344 adapter->num_rx_queues = 1;
1346 if (e1000_alloc_queues(adapter)) {
1347 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1351 #ifdef CONFIG_E1000_NAPI
1352 for (i = 0; i < adapter->num_rx_queues; i++) {
1353 adapter->polling_netdev[i].priv = adapter;
1354 dev_hold(&adapter->polling_netdev[i]);
1355 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1357 spin_lock_init(&adapter->tx_queue_lock);
1360 /* Explicitly disable IRQ since the NIC can be in any state. */
1361 e1000_irq_disable(adapter);
1363 spin_lock_init(&adapter->stats_lock);
1365 set_bit(__E1000_DOWN, &adapter->flags);
1371 * e1000_alloc_queues - Allocate memory for all rings
1372 * @adapter: board private structure to initialize
1374 * We allocate one ring per queue at run-time since we don't know the
1375 * number of queues at compile-time. The polling_netdev array is
1376 * intended for Multiqueue, but should work fine with a single queue.
1379 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1381 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1382 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1383 if (!adapter->tx_ring)
1386 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1387 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1388 if (!adapter->rx_ring) {
1389 kfree(adapter->tx_ring);
1393 #ifdef CONFIG_E1000_NAPI
1394 adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1395 sizeof(struct net_device),
1397 if (!adapter->polling_netdev) {
1398 kfree(adapter->tx_ring);
1399 kfree(adapter->rx_ring);
1404 return E1000_SUCCESS;
1408 * e1000_open - Called when a network interface is made active
1409 * @netdev: network interface device structure
1411 * Returns 0 on success, negative value on failure
1413 * The open entry point is called when a network interface is made
1414 * active by the system (IFF_UP). At this point all resources needed
1415 * for transmit and receive operations are allocated, the interrupt
1416 * handler is registered with the OS, the watchdog timer is started,
1417 * and the stack is notified that the interface is ready.
1420 static int e1000_open(struct net_device *netdev)
1422 struct e1000_adapter *adapter = netdev_priv(netdev);
1423 struct e1000_hw *hw = &adapter->hw;
1426 /* disallow open during test */
1427 if (test_bit(__E1000_TESTING, &adapter->flags))
1430 /* allocate transmit descriptors */
1431 err = e1000_setup_all_tx_resources(adapter);
1435 /* allocate receive descriptors */
1436 err = e1000_setup_all_rx_resources(adapter);
1440 e1000_power_up_phy(adapter);
1442 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1443 if ((hw->mng_cookie.status &
1444 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1445 e1000_update_mng_vlan(adapter);
1448 /* If AMT is enabled, let the firmware know that the network
1449 * interface is now open */
1450 if (hw->mac_type == e1000_82573 &&
1451 e1000_check_mng_mode(hw))
1452 e1000_get_hw_control(adapter);
1454 /* before we allocate an interrupt, we must be ready to handle it.
1455 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1456 * as soon as we call pci_request_irq, so we have to setup our
1457 * clean_rx handler before we do so. */
1458 e1000_configure(adapter);
1460 err = e1000_request_irq(adapter);
1464 /* From here on the code is the same as e1000_up() */
1465 clear_bit(__E1000_DOWN, &adapter->flags);
1467 #ifdef CONFIG_E1000_NAPI
1468 napi_enable(&adapter->napi);
1471 e1000_irq_enable(adapter);
1473 netif_start_queue(netdev);
1475 /* fire a link status change interrupt to start the watchdog */
1476 ew32(ICS, E1000_ICS_LSC);
1478 return E1000_SUCCESS;
1481 e1000_release_hw_control(adapter);
1482 e1000_power_down_phy(adapter);
1483 e1000_free_all_rx_resources(adapter);
1485 e1000_free_all_tx_resources(adapter);
1487 e1000_reset(adapter);
1493 * e1000_close - Disables a network interface
1494 * @netdev: network interface device structure
1496 * Returns 0, this is not allowed to fail
1498 * The close entry point is called when an interface is de-activated
1499 * by the OS. The hardware is still under the drivers control, but
1500 * needs to be disabled. A global MAC reset is issued to stop the
1501 * hardware, and all transmit and receive resources are freed.
1504 static int e1000_close(struct net_device *netdev)
1506 struct e1000_adapter *adapter = netdev_priv(netdev);
1507 struct e1000_hw *hw = &adapter->hw;
1509 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1510 e1000_down(adapter);
1511 e1000_power_down_phy(adapter);
1512 e1000_free_irq(adapter);
1514 e1000_free_all_tx_resources(adapter);
1515 e1000_free_all_rx_resources(adapter);
1517 /* kill manageability vlan ID if supported, but not if a vlan with
1518 * the same ID is registered on the host OS (let 8021q kill it) */
1519 if ((hw->mng_cookie.status &
1520 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1522 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1523 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1526 /* If AMT is enabled, let the firmware know that the network
1527 * interface is now closed */
1528 if (hw->mac_type == e1000_82573 &&
1529 e1000_check_mng_mode(hw))
1530 e1000_release_hw_control(adapter);
1536 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1537 * @adapter: address of board private structure
1538 * @start: address of beginning of memory
1539 * @len: length of memory
1541 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1544 struct e1000_hw *hw = &adapter->hw;
1545 unsigned long begin = (unsigned long) start;
1546 unsigned long end = begin + len;
1548 /* First rev 82545 and 82546 need to not allow any memory
1549 * write location to cross 64k boundary due to errata 23 */
1550 if (hw->mac_type == e1000_82545 ||
1551 hw->mac_type == e1000_82546) {
1552 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1559 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1560 * @adapter: board private structure
1561 * @txdr: tx descriptor ring (for a specific queue) to setup
1563 * Return 0 on success, negative on failure
1566 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1567 struct e1000_tx_ring *txdr)
1569 struct pci_dev *pdev = adapter->pdev;
1572 size = sizeof(struct e1000_buffer) * txdr->count;
1573 txdr->buffer_info = vmalloc(size);
1574 if (!txdr->buffer_info) {
1576 "Unable to allocate memory for the transmit descriptor ring\n");
1579 memset(txdr->buffer_info, 0, size);
1581 /* round up to nearest 4K */
1583 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1584 txdr->size = ALIGN(txdr->size, 4096);
1586 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1589 vfree(txdr->buffer_info);
1591 "Unable to allocate memory for the transmit descriptor ring\n");
1595 /* Fix for errata 23, can't cross 64kB boundary */
1596 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1597 void *olddesc = txdr->desc;
1598 dma_addr_t olddma = txdr->dma;
1599 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1600 "at %p\n", txdr->size, txdr->desc);
1601 /* Try again, without freeing the previous */
1602 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1603 /* Failed allocation, critical failure */
1605 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1606 goto setup_tx_desc_die;
1609 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1611 pci_free_consistent(pdev, txdr->size, txdr->desc,
1613 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1615 "Unable to allocate aligned memory "
1616 "for the transmit descriptor ring\n");
1617 vfree(txdr->buffer_info);
1620 /* Free old allocation, new allocation was successful */
1621 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1624 memset(txdr->desc, 0, txdr->size);
1626 txdr->next_to_use = 0;
1627 txdr->next_to_clean = 0;
1628 spin_lock_init(&txdr->tx_lock);
1634 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1635 * (Descriptors) for all queues
1636 * @adapter: board private structure
1638 * Return 0 on success, negative on failure
1641 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1645 for (i = 0; i < adapter->num_tx_queues; i++) {
1646 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1649 "Allocation for Tx Queue %u failed\n", i);
1650 for (i-- ; i >= 0; i--)
1651 e1000_free_tx_resources(adapter,
1652 &adapter->tx_ring[i]);
1661 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1662 * @adapter: board private structure
1664 * Configure the Tx unit of the MAC after a reset.
1667 static void e1000_configure_tx(struct e1000_adapter *adapter)
1670 struct e1000_hw *hw = &adapter->hw;
1671 u32 tdlen, tctl, tipg, tarc;
1674 /* Setup the HW Tx Head and Tail descriptor pointers */
1676 switch (adapter->num_tx_queues) {
1679 tdba = adapter->tx_ring[0].dma;
1680 tdlen = adapter->tx_ring[0].count *
1681 sizeof(struct e1000_tx_desc);
1683 ew32(TDBAH, (tdba >> 32));
1684 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1687 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1688 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1692 /* Set the default values for the Tx Inter Packet Gap timer */
1693 if (hw->mac_type <= e1000_82547_rev_2 &&
1694 (hw->media_type == e1000_media_type_fiber ||
1695 hw->media_type == e1000_media_type_internal_serdes))
1696 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1698 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1700 switch (hw->mac_type) {
1701 case e1000_82542_rev2_0:
1702 case e1000_82542_rev2_1:
1703 tipg = DEFAULT_82542_TIPG_IPGT;
1704 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1705 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1707 case e1000_80003es2lan:
1708 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1709 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1712 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1713 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1716 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1717 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1720 /* Set the Tx Interrupt Delay register */
1722 ew32(TIDV, adapter->tx_int_delay);
1723 if (hw->mac_type >= e1000_82540)
1724 ew32(TADV, adapter->tx_abs_int_delay);
1726 /* Program the Transmit Control Register */
1729 tctl &= ~E1000_TCTL_CT;
1730 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1731 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1733 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1735 /* set the speed mode bit, we'll clear it if we're not at
1736 * gigabit link later */
1739 } else if (hw->mac_type == e1000_80003es2lan) {
1748 e1000_config_collision_dist(hw);
1750 /* Setup Transmit Descriptor Settings for eop descriptor */
1751 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1753 /* only set IDE if we are delaying interrupts using the timers */
1754 if (adapter->tx_int_delay)
1755 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1757 if (hw->mac_type < e1000_82543)
1758 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1760 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1762 /* Cache if we're 82544 running in PCI-X because we'll
1763 * need this to apply a workaround later in the send path. */
1764 if (hw->mac_type == e1000_82544 &&
1765 hw->bus_type == e1000_bus_type_pcix)
1766 adapter->pcix_82544 = 1;
1773 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1774 * @adapter: board private structure
1775 * @rxdr: rx descriptor ring (for a specific queue) to setup
1777 * Returns 0 on success, negative on failure
1780 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1781 struct e1000_rx_ring *rxdr)
1783 struct e1000_hw *hw = &adapter->hw;
1784 struct pci_dev *pdev = adapter->pdev;
1787 size = sizeof(struct e1000_buffer) * rxdr->count;
1788 rxdr->buffer_info = vmalloc(size);
1789 if (!rxdr->buffer_info) {
1791 "Unable to allocate memory for the receive descriptor ring\n");
1794 memset(rxdr->buffer_info, 0, size);
1796 rxdr->ps_page = kcalloc(rxdr->count, sizeof(struct e1000_ps_page),
1798 if (!rxdr->ps_page) {
1799 vfree(rxdr->buffer_info);
1801 "Unable to allocate memory for the receive descriptor ring\n");
1805 rxdr->ps_page_dma = kcalloc(rxdr->count,
1806 sizeof(struct e1000_ps_page_dma),
1808 if (!rxdr->ps_page_dma) {
1809 vfree(rxdr->buffer_info);
1810 kfree(rxdr->ps_page);
1812 "Unable to allocate memory for the receive descriptor ring\n");
1816 if (hw->mac_type <= e1000_82547_rev_2)
1817 desc_len = sizeof(struct e1000_rx_desc);
1819 desc_len = sizeof(union e1000_rx_desc_packet_split);
1821 /* Round up to nearest 4K */
1823 rxdr->size = rxdr->count * desc_len;
1824 rxdr->size = ALIGN(rxdr->size, 4096);
1826 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1830 "Unable to allocate memory for the receive descriptor ring\n");
1832 vfree(rxdr->buffer_info);
1833 kfree(rxdr->ps_page);
1834 kfree(rxdr->ps_page_dma);
1838 /* Fix for errata 23, can't cross 64kB boundary */
1839 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1840 void *olddesc = rxdr->desc;
1841 dma_addr_t olddma = rxdr->dma;
1842 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1843 "at %p\n", rxdr->size, rxdr->desc);
1844 /* Try again, without freeing the previous */
1845 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1846 /* Failed allocation, critical failure */
1848 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1850 "Unable to allocate memory "
1851 "for the receive descriptor ring\n");
1852 goto setup_rx_desc_die;
1855 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1857 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1859 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1861 "Unable to allocate aligned memory "
1862 "for the receive descriptor ring\n");
1863 goto setup_rx_desc_die;
1865 /* Free old allocation, new allocation was successful */
1866 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1869 memset(rxdr->desc, 0, rxdr->size);
1871 rxdr->next_to_clean = 0;
1872 rxdr->next_to_use = 0;
1878 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1879 * (Descriptors) for all queues
1880 * @adapter: board private structure
1882 * Return 0 on success, negative on failure
1885 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1889 for (i = 0; i < adapter->num_rx_queues; i++) {
1890 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1893 "Allocation for Rx Queue %u failed\n", i);
1894 for (i-- ; i >= 0; i--)
1895 e1000_free_rx_resources(adapter,
1896 &adapter->rx_ring[i]);
1905 * e1000_setup_rctl - configure the receive control registers
1906 * @adapter: Board private structure
1908 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1909 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1910 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1912 struct e1000_hw *hw = &adapter->hw;
1915 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1921 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1923 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1924 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1925 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1927 if (hw->tbi_compatibility_on == 1)
1928 rctl |= E1000_RCTL_SBP;
1930 rctl &= ~E1000_RCTL_SBP;
1932 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1933 rctl &= ~E1000_RCTL_LPE;
1935 rctl |= E1000_RCTL_LPE;
1937 /* Setup buffer sizes */
1938 rctl &= ~E1000_RCTL_SZ_4096;
1939 rctl |= E1000_RCTL_BSEX;
1940 switch (adapter->rx_buffer_len) {
1941 case E1000_RXBUFFER_256:
1942 rctl |= E1000_RCTL_SZ_256;
1943 rctl &= ~E1000_RCTL_BSEX;
1945 case E1000_RXBUFFER_512:
1946 rctl |= E1000_RCTL_SZ_512;
1947 rctl &= ~E1000_RCTL_BSEX;
1949 case E1000_RXBUFFER_1024:
1950 rctl |= E1000_RCTL_SZ_1024;
1951 rctl &= ~E1000_RCTL_BSEX;
1953 case E1000_RXBUFFER_2048:
1955 rctl |= E1000_RCTL_SZ_2048;
1956 rctl &= ~E1000_RCTL_BSEX;
1958 case E1000_RXBUFFER_4096:
1959 rctl |= E1000_RCTL_SZ_4096;
1961 case E1000_RXBUFFER_8192:
1962 rctl |= E1000_RCTL_SZ_8192;
1964 case E1000_RXBUFFER_16384:
1965 rctl |= E1000_RCTL_SZ_16384;
1969 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1970 /* 82571 and greater support packet-split where the protocol
1971 * header is placed in skb->data and the packet data is
1972 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1973 * In the case of a non-split, skb->data is linearly filled,
1974 * followed by the page buffers. Therefore, skb->data is
1975 * sized to hold the largest protocol header.
1977 /* allocations using alloc_page take too long for regular MTU
1978 * so only enable packet split for jumbo frames */
1979 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1980 if ((hw->mac_type >= e1000_82571) && (pages <= 3) &&
1981 PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
1982 adapter->rx_ps_pages = pages;
1984 adapter->rx_ps_pages = 0;
1986 if (adapter->rx_ps_pages) {
1987 /* Configure extra packet-split registers */
1988 rfctl = er32(RFCTL);
1989 rfctl |= E1000_RFCTL_EXTEN;
1990 /* disable packet split support for IPv6 extension headers,
1991 * because some malformed IPv6 headers can hang the RX */
1992 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
1993 E1000_RFCTL_NEW_IPV6_EXT_DIS);
1997 rctl |= E1000_RCTL_DTYP_PS;
1999 psrctl |= adapter->rx_ps_bsize0 >>
2000 E1000_PSRCTL_BSIZE0_SHIFT;
2002 switch (adapter->rx_ps_pages) {
2004 psrctl |= PAGE_SIZE <<
2005 E1000_PSRCTL_BSIZE3_SHIFT;
2007 psrctl |= PAGE_SIZE <<
2008 E1000_PSRCTL_BSIZE2_SHIFT;
2010 psrctl |= PAGE_SIZE >>
2011 E1000_PSRCTL_BSIZE1_SHIFT;
2015 ew32(PSRCTL, psrctl);
2022 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
2023 * @adapter: board private structure
2025 * Configure the Rx unit of the MAC after a reset.
2028 static void e1000_configure_rx(struct e1000_adapter *adapter)
2031 struct e1000_hw *hw = &adapter->hw;
2032 u32 rdlen, rctl, rxcsum, ctrl_ext;
2034 if (adapter->rx_ps_pages) {
2035 /* this is a 32 byte descriptor */
2036 rdlen = adapter->rx_ring[0].count *
2037 sizeof(union e1000_rx_desc_packet_split);
2038 adapter->clean_rx = e1000_clean_rx_irq_ps;
2039 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2041 rdlen = adapter->rx_ring[0].count *
2042 sizeof(struct e1000_rx_desc);
2043 adapter->clean_rx = e1000_clean_rx_irq;
2044 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2047 /* disable receives while setting up the descriptors */
2049 ew32(RCTL, rctl & ~E1000_RCTL_EN);
2051 /* set the Receive Delay Timer Register */
2052 ew32(RDTR, adapter->rx_int_delay);
2054 if (hw->mac_type >= e1000_82540) {
2055 ew32(RADV, adapter->rx_abs_int_delay);
2056 if (adapter->itr_setting != 0)
2057 ew32(ITR, 1000000000 / (adapter->itr * 256));
2060 if (hw->mac_type >= e1000_82571) {
2061 ctrl_ext = er32(CTRL_EXT);
2062 /* Reset delay timers after every interrupt */
2063 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2064 #ifdef CONFIG_E1000_NAPI
2065 /* Auto-Mask interrupts upon ICR access */
2066 ctrl_ext |= E1000_CTRL_EXT_IAME;
2067 ew32(IAM, 0xffffffff);
2069 ew32(CTRL_EXT, ctrl_ext);
2070 E1000_WRITE_FLUSH();
2073 /* Setup the HW Rx Head and Tail Descriptor Pointers and
2074 * the Base and Length of the Rx Descriptor Ring */
2075 switch (adapter->num_rx_queues) {
2078 rdba = adapter->rx_ring[0].dma;
2080 ew32(RDBAH, (rdba >> 32));
2081 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
2084 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2085 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2089 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2090 if (hw->mac_type >= e1000_82543) {
2091 rxcsum = er32(RXCSUM);
2092 if (adapter->rx_csum) {
2093 rxcsum |= E1000_RXCSUM_TUOFL;
2095 /* Enable 82571 IPv4 payload checksum for UDP fragments
2096 * Must be used in conjunction with packet-split. */
2097 if ((hw->mac_type >= e1000_82571) &&
2098 (adapter->rx_ps_pages)) {
2099 rxcsum |= E1000_RXCSUM_IPPCSE;
2102 rxcsum &= ~E1000_RXCSUM_TUOFL;
2103 /* don't need to clear IPPCSE as it defaults to 0 */
2105 ew32(RXCSUM, rxcsum);
2108 /* enable early receives on 82573, only takes effect if using > 2048
2109 * byte total frame size. for example only for jumbo frames */
2110 #define E1000_ERT_2048 0x100
2111 if (hw->mac_type == e1000_82573)
2112 ew32(ERT, E1000_ERT_2048);
2114 /* Enable Receives */
2119 * e1000_free_tx_resources - Free Tx Resources per Queue
2120 * @adapter: board private structure
2121 * @tx_ring: Tx descriptor ring for a specific queue
2123 * Free all transmit software resources
2126 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
2127 struct e1000_tx_ring *tx_ring)
2129 struct pci_dev *pdev = adapter->pdev;
2131 e1000_clean_tx_ring(adapter, tx_ring);
2133 vfree(tx_ring->buffer_info);
2134 tx_ring->buffer_info = NULL;
2136 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2138 tx_ring->desc = NULL;
2142 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2143 * @adapter: board private structure
2145 * Free all transmit software resources
2148 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2152 for (i = 0; i < adapter->num_tx_queues; i++)
2153 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2156 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2157 struct e1000_buffer *buffer_info)
2159 if (buffer_info->dma) {
2160 pci_unmap_page(adapter->pdev,
2162 buffer_info->length,
2164 buffer_info->dma = 0;
2166 if (buffer_info->skb) {
2167 dev_kfree_skb_any(buffer_info->skb);
2168 buffer_info->skb = NULL;
2170 /* buffer_info must be completely set up in the transmit path */
2174 * e1000_clean_tx_ring - Free Tx Buffers
2175 * @adapter: board private structure
2176 * @tx_ring: ring to be cleaned
2179 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
2180 struct e1000_tx_ring *tx_ring)
2182 struct e1000_hw *hw = &adapter->hw;
2183 struct e1000_buffer *buffer_info;
2187 /* Free all the Tx ring sk_buffs */
2189 for (i = 0; i < tx_ring->count; i++) {
2190 buffer_info = &tx_ring->buffer_info[i];
2191 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2194 size = sizeof(struct e1000_buffer) * tx_ring->count;
2195 memset(tx_ring->buffer_info, 0, size);
2197 /* Zero out the descriptor ring */
2199 memset(tx_ring->desc, 0, tx_ring->size);
2201 tx_ring->next_to_use = 0;
2202 tx_ring->next_to_clean = 0;
2203 tx_ring->last_tx_tso = 0;
2205 writel(0, hw->hw_addr + tx_ring->tdh);
2206 writel(0, hw->hw_addr + tx_ring->tdt);
2210 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2211 * @adapter: board private structure
2214 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2218 for (i = 0; i < adapter->num_tx_queues; i++)
2219 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2223 * e1000_free_rx_resources - Free Rx Resources
2224 * @adapter: board private structure
2225 * @rx_ring: ring to clean the resources from
2227 * Free all receive software resources
2230 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2231 struct e1000_rx_ring *rx_ring)
2233 struct pci_dev *pdev = adapter->pdev;
2235 e1000_clean_rx_ring(adapter, rx_ring);
2237 vfree(rx_ring->buffer_info);
2238 rx_ring->buffer_info = NULL;
2239 kfree(rx_ring->ps_page);
2240 rx_ring->ps_page = NULL;
2241 kfree(rx_ring->ps_page_dma);
2242 rx_ring->ps_page_dma = NULL;
2244 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2246 rx_ring->desc = NULL;
2250 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2251 * @adapter: board private structure
2253 * Free all receive software resources
2256 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2260 for (i = 0; i < adapter->num_rx_queues; i++)
2261 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2265 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2266 * @adapter: board private structure
2267 * @rx_ring: ring to free buffers from
2270 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2271 struct e1000_rx_ring *rx_ring)
2273 struct e1000_hw *hw = &adapter->hw;
2274 struct e1000_buffer *buffer_info;
2275 struct e1000_ps_page *ps_page;
2276 struct e1000_ps_page_dma *ps_page_dma;
2277 struct pci_dev *pdev = adapter->pdev;
2281 /* Free all the Rx ring sk_buffs */
2282 for (i = 0; i < rx_ring->count; i++) {
2283 buffer_info = &rx_ring->buffer_info[i];
2284 if (buffer_info->skb) {
2285 pci_unmap_single(pdev,
2287 buffer_info->length,
2288 PCI_DMA_FROMDEVICE);
2290 dev_kfree_skb(buffer_info->skb);
2291 buffer_info->skb = NULL;
2293 ps_page = &rx_ring->ps_page[i];
2294 ps_page_dma = &rx_ring->ps_page_dma[i];
2295 for (j = 0; j < adapter->rx_ps_pages; j++) {
2296 if (!ps_page->ps_page[j]) break;
2297 pci_unmap_page(pdev,
2298 ps_page_dma->ps_page_dma[j],
2299 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2300 ps_page_dma->ps_page_dma[j] = 0;
2301 put_page(ps_page->ps_page[j]);
2302 ps_page->ps_page[j] = NULL;
2306 size = sizeof(struct e1000_buffer) * rx_ring->count;
2307 memset(rx_ring->buffer_info, 0, size);
2308 size = sizeof(struct e1000_ps_page) * rx_ring->count;
2309 memset(rx_ring->ps_page, 0, size);
2310 size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2311 memset(rx_ring->ps_page_dma, 0, size);
2313 /* Zero out the descriptor ring */
2315 memset(rx_ring->desc, 0, rx_ring->size);
2317 rx_ring->next_to_clean = 0;
2318 rx_ring->next_to_use = 0;
2320 writel(0, hw->hw_addr + rx_ring->rdh);
2321 writel(0, hw->hw_addr + rx_ring->rdt);
2325 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2326 * @adapter: board private structure
2329 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2333 for (i = 0; i < adapter->num_rx_queues; i++)
2334 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2337 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2338 * and memory write and invalidate disabled for certain operations
2340 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2342 struct e1000_hw *hw = &adapter->hw;
2343 struct net_device *netdev = adapter->netdev;
2346 e1000_pci_clear_mwi(hw);
2349 rctl |= E1000_RCTL_RST;
2351 E1000_WRITE_FLUSH();
2354 if (netif_running(netdev))
2355 e1000_clean_all_rx_rings(adapter);
2358 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2360 struct e1000_hw *hw = &adapter->hw;
2361 struct net_device *netdev = adapter->netdev;
2365 rctl &= ~E1000_RCTL_RST;
2367 E1000_WRITE_FLUSH();
2370 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2371 e1000_pci_set_mwi(hw);
2373 if (netif_running(netdev)) {
2374 /* No need to loop, because 82542 supports only 1 queue */
2375 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2376 e1000_configure_rx(adapter);
2377 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2382 * e1000_set_mac - Change the Ethernet Address of the NIC
2383 * @netdev: network interface device structure
2384 * @p: pointer to an address structure
2386 * Returns 0 on success, negative on failure
2389 static int e1000_set_mac(struct net_device *netdev, void *p)
2391 struct e1000_adapter *adapter = netdev_priv(netdev);
2392 struct e1000_hw *hw = &adapter->hw;
2393 struct sockaddr *addr = p;
2395 if (!is_valid_ether_addr(addr->sa_data))
2396 return -EADDRNOTAVAIL;
2398 /* 82542 2.0 needs to be in reset to write receive address registers */
2400 if (hw->mac_type == e1000_82542_rev2_0)
2401 e1000_enter_82542_rst(adapter);
2403 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2404 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2406 e1000_rar_set(hw, hw->mac_addr, 0);
2408 /* With 82571 controllers, LAA may be overwritten (with the default)
2409 * due to controller reset from the other port. */
2410 if (hw->mac_type == e1000_82571) {
2411 /* activate the work around */
2412 hw->laa_is_present = 1;
2414 /* Hold a copy of the LAA in RAR[14] This is done so that
2415 * between the time RAR[0] gets clobbered and the time it
2416 * gets fixed (in e1000_watchdog), the actual LAA is in one
2417 * of the RARs and no incoming packets directed to this port
2418 * are dropped. Eventaully the LAA will be in RAR[0] and
2420 e1000_rar_set(hw, hw->mac_addr,
2421 E1000_RAR_ENTRIES - 1);
2424 if (hw->mac_type == e1000_82542_rev2_0)
2425 e1000_leave_82542_rst(adapter);
2431 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2432 * @netdev: network interface device structure
2434 * The set_rx_mode entry point is called whenever the unicast or multicast
2435 * address lists or the network interface flags are updated. This routine is
2436 * responsible for configuring the hardware for proper unicast, multicast,
2437 * promiscuous mode, and all-multi behavior.
2440 static void e1000_set_rx_mode(struct net_device *netdev)
2442 struct e1000_adapter *adapter = netdev_priv(netdev);
2443 struct e1000_hw *hw = &adapter->hw;
2444 struct dev_addr_list *uc_ptr;
2445 struct dev_addr_list *mc_ptr;
2448 int i, rar_entries = E1000_RAR_ENTRIES;
2449 int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2450 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2451 E1000_NUM_MTA_REGISTERS;
2453 if (hw->mac_type == e1000_ich8lan)
2454 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2456 /* reserve RAR[14] for LAA over-write work-around */
2457 if (hw->mac_type == e1000_82571)
2460 /* Check for Promiscuous and All Multicast modes */
2464 if (netdev->flags & IFF_PROMISC) {
2465 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2466 rctl &= ~E1000_RCTL_VFE;
2468 if (netdev->flags & IFF_ALLMULTI) {
2469 rctl |= E1000_RCTL_MPE;
2471 rctl &= ~E1000_RCTL_MPE;
2473 if (adapter->hw.mac_type != e1000_ich8lan)
2474 rctl |= E1000_RCTL_VFE;
2478 if (netdev->uc_count > rar_entries - 1) {
2479 rctl |= E1000_RCTL_UPE;
2480 } else if (!(netdev->flags & IFF_PROMISC)) {
2481 rctl &= ~E1000_RCTL_UPE;
2482 uc_ptr = netdev->uc_list;
2487 /* 82542 2.0 needs to be in reset to write receive address registers */
2489 if (hw->mac_type == e1000_82542_rev2_0)
2490 e1000_enter_82542_rst(adapter);
2492 /* load the first 14 addresses into the exact filters 1-14. Unicast
2493 * addresses take precedence to avoid disabling unicast filtering
2496 * RAR 0 is used for the station MAC adddress
2497 * if there are not 14 addresses, go ahead and clear the filters
2498 * -- with 82571 controllers only 0-13 entries are filled here
2500 mc_ptr = netdev->mc_list;
2502 for (i = 1; i < rar_entries; i++) {
2504 e1000_rar_set(hw, uc_ptr->da_addr, i);
2505 uc_ptr = uc_ptr->next;
2506 } else if (mc_ptr) {
2507 e1000_rar_set(hw, mc_ptr->da_addr, i);
2508 mc_ptr = mc_ptr->next;
2510 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2511 E1000_WRITE_FLUSH();
2512 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2513 E1000_WRITE_FLUSH();
2516 WARN_ON(uc_ptr != NULL);
2518 /* clear the old settings from the multicast hash table */
2520 for (i = 0; i < mta_reg_count; i++) {
2521 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2522 E1000_WRITE_FLUSH();
2525 /* load any remaining addresses into the hash table */
2527 for (; mc_ptr; mc_ptr = mc_ptr->next) {
2528 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2529 e1000_mta_set(hw, hash_value);
2532 if (hw->mac_type == e1000_82542_rev2_0)
2533 e1000_leave_82542_rst(adapter);
2536 /* Need to wait a few seconds after link up to get diagnostic information from
2539 static void e1000_update_phy_info(unsigned long data)
2541 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2542 struct e1000_hw *hw = &adapter->hw;
2543 e1000_phy_get_info(hw, &adapter->phy_info);
2547 * e1000_82547_tx_fifo_stall - Timer Call-back
2548 * @data: pointer to adapter cast into an unsigned long
2551 static void e1000_82547_tx_fifo_stall(unsigned long data)
2553 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2554 struct e1000_hw *hw = &adapter->hw;
2555 struct net_device *netdev = adapter->netdev;
2558 if (atomic_read(&adapter->tx_fifo_stall)) {
2559 if ((er32(TDT) == er32(TDH)) &&
2560 (er32(TDFT) == er32(TDFH)) &&
2561 (er32(TDFTS) == er32(TDFHS))) {
2563 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2564 ew32(TDFT, adapter->tx_head_addr);
2565 ew32(TDFH, adapter->tx_head_addr);
2566 ew32(TDFTS, adapter->tx_head_addr);
2567 ew32(TDFHS, adapter->tx_head_addr);
2569 E1000_WRITE_FLUSH();
2571 adapter->tx_fifo_head = 0;
2572 atomic_set(&adapter->tx_fifo_stall, 0);
2573 netif_wake_queue(netdev);
2575 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2581 * e1000_watchdog - Timer Call-back
2582 * @data: pointer to adapter cast into an unsigned long
2584 static void e1000_watchdog(unsigned long data)
2586 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2587 struct e1000_hw *hw = &adapter->hw;
2588 struct net_device *netdev = adapter->netdev;
2589 struct e1000_tx_ring *txdr = adapter->tx_ring;
2593 ret_val = e1000_check_for_link(hw);
2594 if ((ret_val == E1000_ERR_PHY) &&
2595 (hw->phy_type == e1000_phy_igp_3) &&
2596 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2597 /* See e1000_kumeran_lock_loss_workaround() */
2599 "Gigabit has been disabled, downgrading speed\n");
2602 if (hw->mac_type == e1000_82573) {
2603 e1000_enable_tx_pkt_filtering(hw);
2604 if (adapter->mng_vlan_id != hw->mng_cookie.vlan_id)
2605 e1000_update_mng_vlan(adapter);
2608 if ((hw->media_type == e1000_media_type_internal_serdes) &&
2609 !(er32(TXCW) & E1000_TXCW_ANE))
2610 link = !hw->serdes_link_down;
2612 link = er32(STATUS) & E1000_STATUS_LU;
2615 if (!netif_carrier_ok(netdev)) {
2618 e1000_get_speed_and_duplex(hw,
2619 &adapter->link_speed,
2620 &adapter->link_duplex);
2623 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2624 "Flow Control: %s\n",
2625 adapter->link_speed,
2626 adapter->link_duplex == FULL_DUPLEX ?
2627 "Full Duplex" : "Half Duplex",
2628 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2629 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2630 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2631 E1000_CTRL_TFCE) ? "TX" : "None" )));
2633 /* tweak tx_queue_len according to speed/duplex
2634 * and adjust the timeout factor */
2635 netdev->tx_queue_len = adapter->tx_queue_len;
2636 adapter->tx_timeout_factor = 1;
2637 switch (adapter->link_speed) {
2640 netdev->tx_queue_len = 10;
2641 adapter->tx_timeout_factor = 8;
2645 netdev->tx_queue_len = 100;
2646 /* maybe add some timeout factor ? */
2650 if ((hw->mac_type == e1000_82571 ||
2651 hw->mac_type == e1000_82572) &&
2654 tarc0 = er32(TARC0);
2655 tarc0 &= ~(1 << 21);
2659 /* disable TSO for pcie and 10/100 speeds, to avoid
2660 * some hardware issues */
2661 if (!adapter->tso_force &&
2662 hw->bus_type == e1000_bus_type_pci_express){
2663 switch (adapter->link_speed) {
2667 "10/100 speed: disabling TSO\n");
2668 netdev->features &= ~NETIF_F_TSO;
2669 netdev->features &= ~NETIF_F_TSO6;
2672 netdev->features |= NETIF_F_TSO;
2673 netdev->features |= NETIF_F_TSO6;
2681 /* enable transmits in the hardware, need to do this
2682 * after setting TARC0 */
2684 tctl |= E1000_TCTL_EN;
2687 netif_carrier_on(netdev);
2688 netif_wake_queue(netdev);
2689 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2690 adapter->smartspeed = 0;
2692 /* make sure the receive unit is started */
2693 if (hw->rx_needs_kicking) {
2694 u32 rctl = er32(RCTL);
2695 ew32(RCTL, rctl | E1000_RCTL_EN);
2699 if (netif_carrier_ok(netdev)) {
2700 adapter->link_speed = 0;
2701 adapter->link_duplex = 0;
2702 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2703 netif_carrier_off(netdev);
2704 netif_stop_queue(netdev);
2705 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2707 /* 80003ES2LAN workaround--
2708 * For packet buffer work-around on link down event;
2709 * disable receives in the ISR and
2710 * reset device here in the watchdog
2712 if (hw->mac_type == e1000_80003es2lan)
2714 schedule_work(&adapter->reset_task);
2717 e1000_smartspeed(adapter);
2720 e1000_update_stats(adapter);
2722 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2723 adapter->tpt_old = adapter->stats.tpt;
2724 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2725 adapter->colc_old = adapter->stats.colc;
2727 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2728 adapter->gorcl_old = adapter->stats.gorcl;
2729 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2730 adapter->gotcl_old = adapter->stats.gotcl;
2732 e1000_update_adaptive(hw);
2734 if (!netif_carrier_ok(netdev)) {
2735 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2736 /* We've lost link, so the controller stops DMA,
2737 * but we've got queued Tx work that's never going
2738 * to get done, so reset controller to flush Tx.
2739 * (Do the reset outside of interrupt context). */
2740 adapter->tx_timeout_count++;
2741 schedule_work(&adapter->reset_task);
2745 /* Cause software interrupt to ensure rx ring is cleaned */
2746 ew32(ICS, E1000_ICS_RXDMT0);
2748 /* Force detection of hung controller every watchdog period */
2749 adapter->detect_tx_hung = true;
2751 /* With 82571 controllers, LAA may be overwritten due to controller
2752 * reset from the other port. Set the appropriate LAA in RAR[0] */
2753 if (hw->mac_type == e1000_82571 && hw->laa_is_present)
2754 e1000_rar_set(hw, hw->mac_addr, 0);
2756 /* Reset the timer */
2757 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2760 enum latency_range {
2764 latency_invalid = 255
2768 * e1000_update_itr - update the dynamic ITR value based on statistics
2769 * Stores a new ITR value based on packets and byte
2770 * counts during the last interrupt. The advantage of per interrupt
2771 * computation is faster updates and more accurate ITR for the current
2772 * traffic pattern. Constants in this function were computed
2773 * based on theoretical maximum wire speed and thresholds were set based
2774 * on testing data as well as attempting to minimize response time
2775 * while increasing bulk throughput.
2776 * this functionality is controlled by the InterruptThrottleRate module
2777 * parameter (see e1000_param.c)
2778 * @adapter: pointer to adapter
2779 * @itr_setting: current adapter->itr
2780 * @packets: the number of packets during this measurement interval
2781 * @bytes: the number of bytes during this measurement interval
2783 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2784 u16 itr_setting, int packets, int bytes)
2786 unsigned int retval = itr_setting;
2787 struct e1000_hw *hw = &adapter->hw;
2789 if (unlikely(hw->mac_type < e1000_82540))
2790 goto update_itr_done;
2793 goto update_itr_done;
2795 switch (itr_setting) {
2796 case lowest_latency:
2797 /* jumbo frames get bulk treatment*/
2798 if (bytes/packets > 8000)
2799 retval = bulk_latency;
2800 else if ((packets < 5) && (bytes > 512))
2801 retval = low_latency;
2803 case low_latency: /* 50 usec aka 20000 ints/s */
2804 if (bytes > 10000) {
2805 /* jumbo frames need bulk latency setting */
2806 if (bytes/packets > 8000)
2807 retval = bulk_latency;
2808 else if ((packets < 10) || ((bytes/packets) > 1200))
2809 retval = bulk_latency;
2810 else if ((packets > 35))
2811 retval = lowest_latency;
2812 } else if (bytes/packets > 2000)
2813 retval = bulk_latency;
2814 else if (packets <= 2 && bytes < 512)
2815 retval = lowest_latency;
2817 case bulk_latency: /* 250 usec aka 4000 ints/s */
2818 if (bytes > 25000) {
2820 retval = low_latency;
2821 } else if (bytes < 6000) {
2822 retval = low_latency;
2831 static void e1000_set_itr(struct e1000_adapter *adapter)
2833 struct e1000_hw *hw = &adapter->hw;
2835 u32 new_itr = adapter->itr;
2837 if (unlikely(hw->mac_type < e1000_82540))
2840 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2841 if (unlikely(adapter->link_speed != SPEED_1000)) {
2847 adapter->tx_itr = e1000_update_itr(adapter,
2849 adapter->total_tx_packets,
2850 adapter->total_tx_bytes);
2851 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2852 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2853 adapter->tx_itr = low_latency;
2855 adapter->rx_itr = e1000_update_itr(adapter,
2857 adapter->total_rx_packets,
2858 adapter->total_rx_bytes);
2859 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2860 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2861 adapter->rx_itr = low_latency;
2863 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2865 switch (current_itr) {
2866 /* counts and packets in update_itr are dependent on these numbers */
2867 case lowest_latency:
2871 new_itr = 20000; /* aka hwitr = ~200 */
2881 if (new_itr != adapter->itr) {
2882 /* this attempts to bias the interrupt rate towards Bulk
2883 * by adding intermediate steps when interrupt rate is
2885 new_itr = new_itr > adapter->itr ?
2886 min(adapter->itr + (new_itr >> 2), new_itr) :
2888 adapter->itr = new_itr;
2889 ew32(ITR, 1000000000 / (new_itr * 256));
2895 #define E1000_TX_FLAGS_CSUM 0x00000001
2896 #define E1000_TX_FLAGS_VLAN 0x00000002
2897 #define E1000_TX_FLAGS_TSO 0x00000004
2898 #define E1000_TX_FLAGS_IPV4 0x00000008
2899 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2900 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2902 static int e1000_tso(struct e1000_adapter *adapter,
2903 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2905 struct e1000_context_desc *context_desc;
2906 struct e1000_buffer *buffer_info;
2909 u16 ipcse = 0, tucse, mss;
2910 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2913 if (skb_is_gso(skb)) {
2914 if (skb_header_cloned(skb)) {
2915 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2920 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2921 mss = skb_shinfo(skb)->gso_size;
2922 if (skb->protocol == htons(ETH_P_IP)) {
2923 struct iphdr *iph = ip_hdr(skb);
2926 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2930 cmd_length = E1000_TXD_CMD_IP;
2931 ipcse = skb_transport_offset(skb) - 1;
2932 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2933 ipv6_hdr(skb)->payload_len = 0;
2934 tcp_hdr(skb)->check =
2935 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2936 &ipv6_hdr(skb)->daddr,
2940 ipcss = skb_network_offset(skb);
2941 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2942 tucss = skb_transport_offset(skb);
2943 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2946 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2947 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2949 i = tx_ring->next_to_use;
2950 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2951 buffer_info = &tx_ring->buffer_info[i];
2953 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2954 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2955 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2956 context_desc->upper_setup.tcp_fields.tucss = tucss;
2957 context_desc->upper_setup.tcp_fields.tucso = tucso;
2958 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2959 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2960 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2961 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2963 buffer_info->time_stamp = jiffies;
2964 buffer_info->next_to_watch = i;
2966 if (++i == tx_ring->count) i = 0;
2967 tx_ring->next_to_use = i;
2974 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2975 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2977 struct e1000_context_desc *context_desc;
2978 struct e1000_buffer *buffer_info;
2982 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2983 css = skb_transport_offset(skb);
2985 i = tx_ring->next_to_use;
2986 buffer_info = &tx_ring->buffer_info[i];
2987 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2989 context_desc->lower_setup.ip_config = 0;
2990 context_desc->upper_setup.tcp_fields.tucss = css;
2991 context_desc->upper_setup.tcp_fields.tucso =
2992 css + skb->csum_offset;
2993 context_desc->upper_setup.tcp_fields.tucse = 0;
2994 context_desc->tcp_seg_setup.data = 0;
2995 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2997 buffer_info->time_stamp = jiffies;
2998 buffer_info->next_to_watch = i;
3000 if (unlikely(++i == tx_ring->count)) i = 0;
3001 tx_ring->next_to_use = i;
3009 #define E1000_MAX_TXD_PWR 12
3010 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
3012 static int e1000_tx_map(struct e1000_adapter *adapter,
3013 struct e1000_tx_ring *tx_ring,
3014 struct sk_buff *skb, unsigned int first,
3015 unsigned int max_per_txd, unsigned int nr_frags,
3018 struct e1000_hw *hw = &adapter->hw;
3019 struct e1000_buffer *buffer_info;
3020 unsigned int len = skb->len;
3021 unsigned int offset = 0, size, count = 0, i;
3023 len -= skb->data_len;
3025 i = tx_ring->next_to_use;
3028 buffer_info = &tx_ring->buffer_info[i];
3029 size = min(len, max_per_txd);
3030 /* Workaround for Controller erratum --
3031 * descriptor for non-tso packet in a linear SKB that follows a
3032 * tso gets written back prematurely before the data is fully
3033 * DMA'd to the controller */
3034 if (!skb->data_len && tx_ring->last_tx_tso &&
3036 tx_ring->last_tx_tso = 0;
3040 /* Workaround for premature desc write-backs
3041 * in TSO mode. Append 4-byte sentinel desc */
3042 if (unlikely(mss && !nr_frags && size == len && size > 8))
3044 /* work-around for errata 10 and it applies
3045 * to all controllers in PCI-X mode
3046 * The fix is to make sure that the first descriptor of a
3047 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3049 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3050 (size > 2015) && count == 0))
3053 /* Workaround for potential 82544 hang in PCI-X. Avoid
3054 * terminating buffers within evenly-aligned dwords. */
3055 if (unlikely(adapter->pcix_82544 &&
3056 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3060 buffer_info->length = size;
3062 pci_map_single(adapter->pdev,
3066 buffer_info->time_stamp = jiffies;
3067 buffer_info->next_to_watch = i;
3072 if (unlikely(++i == tx_ring->count)) i = 0;
3075 for (f = 0; f < nr_frags; f++) {
3076 struct skb_frag_struct *frag;
3078 frag = &skb_shinfo(skb)->frags[f];
3080 offset = frag->page_offset;
3083 buffer_info = &tx_ring->buffer_info[i];
3084 size = min(len, max_per_txd);
3085 /* Workaround for premature desc write-backs
3086 * in TSO mode. Append 4-byte sentinel desc */
3087 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3089 /* Workaround for potential 82544 hang in PCI-X.
3090 * Avoid terminating buffers within evenly-aligned
3092 if (unlikely(adapter->pcix_82544 &&
3093 !((unsigned long)(frag->page+offset+size-1) & 4) &&
3097 buffer_info->length = size;
3099 pci_map_page(adapter->pdev,
3104 buffer_info->time_stamp = jiffies;
3105 buffer_info->next_to_watch = i;
3110 if (unlikely(++i == tx_ring->count)) i = 0;
3114 i = (i == 0) ? tx_ring->count - 1 : i - 1;
3115 tx_ring->buffer_info[i].skb = skb;
3116 tx_ring->buffer_info[first].next_to_watch = i;
3121 static void e1000_tx_queue(struct e1000_adapter *adapter,
3122 struct e1000_tx_ring *tx_ring, int tx_flags,
3125 struct e1000_hw *hw = &adapter->hw;
3126 struct e1000_tx_desc *tx_desc = NULL;
3127 struct e1000_buffer *buffer_info;
3128 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3131 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3132 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3134 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3136 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3137 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3140 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3141 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3142 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3145 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3146 txd_lower |= E1000_TXD_CMD_VLE;
3147 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3150 i = tx_ring->next_to_use;
3153 buffer_info = &tx_ring->buffer_info[i];
3154 tx_desc = E1000_TX_DESC(*tx_ring, i);
3155 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3156 tx_desc->lower.data =
3157 cpu_to_le32(txd_lower | buffer_info->length);
3158 tx_desc->upper.data = cpu_to_le32(txd_upper);
3159 if (unlikely(++i == tx_ring->count)) i = 0;
3162 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3164 /* Force memory writes to complete before letting h/w
3165 * know there are new descriptors to fetch. (Only
3166 * applicable for weak-ordered memory model archs,
3167 * such as IA-64). */
3170 tx_ring->next_to_use = i;
3171 writel(i, hw->hw_addr + tx_ring->tdt);
3172 /* we need this if more than one processor can write to our tail
3173 * at a time, it syncronizes IO on IA64/Altix systems */
3178 * 82547 workaround to avoid controller hang in half-duplex environment.
3179 * The workaround is to avoid queuing a large packet that would span
3180 * the internal Tx FIFO ring boundary by notifying the stack to resend
3181 * the packet at a later time. This gives the Tx FIFO an opportunity to
3182 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3183 * to the beginning of the Tx FIFO.
3186 #define E1000_FIFO_HDR 0x10
3187 #define E1000_82547_PAD_LEN 0x3E0
3189 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3190 struct sk_buff *skb)
3192 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3193 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3195 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3197 if (adapter->link_duplex != HALF_DUPLEX)
3198 goto no_fifo_stall_required;
3200 if (atomic_read(&adapter->tx_fifo_stall))
3203 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3204 atomic_set(&adapter->tx_fifo_stall, 1);
3208 no_fifo_stall_required:
3209 adapter->tx_fifo_head += skb_fifo_len;
3210 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3211 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3215 #define MINIMUM_DHCP_PACKET_SIZE 282
3216 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
3217 struct sk_buff *skb)
3219 struct e1000_hw *hw = &adapter->hw;
3221 if (vlan_tx_tag_present(skb)) {
3222 if (!((vlan_tx_tag_get(skb) == hw->mng_cookie.vlan_id) &&
3223 ( hw->mng_cookie.status &
3224 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3227 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3228 struct ethhdr *eth = (struct ethhdr *) skb->data;
3229 if ((htons(ETH_P_IP) == eth->h_proto)) {
3230 const struct iphdr *ip =
3231 (struct iphdr *)((u8 *)skb->data+14);
3232 if (IPPROTO_UDP == ip->protocol) {
3233 struct udphdr *udp =
3234 (struct udphdr *)((u8 *)ip +
3236 if (ntohs(udp->dest) == 67) {
3237 offset = (u8 *)udp + 8 - skb->data;
3238 length = skb->len - offset;
3240 return e1000_mng_write_dhcp_info(hw,
3250 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3252 struct e1000_adapter *adapter = netdev_priv(netdev);
3253 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3255 netif_stop_queue(netdev);
3256 /* Herbert's original patch had:
3257 * smp_mb__after_netif_stop_queue();
3258 * but since that doesn't exist yet, just open code it. */
3261 /* We need to check again in a case another CPU has just
3262 * made room available. */
3263 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3267 netif_start_queue(netdev);
3268 ++adapter->restart_queue;
3272 static int e1000_maybe_stop_tx(struct net_device *netdev,
3273 struct e1000_tx_ring *tx_ring, int size)
3275 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3277 return __e1000_maybe_stop_tx(netdev, size);
3280 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3281 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3283 struct e1000_adapter *adapter = netdev_priv(netdev);
3284 struct e1000_hw *hw = &adapter->hw;
3285 struct e1000_tx_ring *tx_ring;
3286 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3287 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3288 unsigned int tx_flags = 0;
3289 unsigned int len = skb->len - skb->data_len;
3290 unsigned long flags;
3291 unsigned int nr_frags;
3297 /* This goes back to the question of how to logically map a tx queue
3298 * to a flow. Right now, performance is impacted slightly negatively
3299 * if using multiple tx queues. If the stack breaks away from a
3300 * single qdisc implementation, we can look at this again. */
3301 tx_ring = adapter->tx_ring;
3303 if (unlikely(skb->len <= 0)) {
3304 dev_kfree_skb_any(skb);
3305 return NETDEV_TX_OK;
3308 /* 82571 and newer doesn't need the workaround that limited descriptor
3310 if (hw->mac_type >= e1000_82571)
3313 mss = skb_shinfo(skb)->gso_size;
3314 /* The controller does a simple calculation to
3315 * make sure there is enough room in the FIFO before
3316 * initiating the DMA for each buffer. The calc is:
3317 * 4 = ceil(buffer len/mss). To make sure we don't
3318 * overrun the FIFO, adjust the max buffer len if mss
3322 max_per_txd = min(mss << 2, max_per_txd);
3323 max_txd_pwr = fls(max_per_txd) - 1;
3325 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3326 * points to just header, pull a few bytes of payload from
3327 * frags into skb->data */
3328 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3329 if (skb->data_len && hdr_len == len) {
3330 switch (hw->mac_type) {
3331 unsigned int pull_size;
3333 /* Make sure we have room to chop off 4 bytes,
3334 * and that the end alignment will work out to
3335 * this hardware's requirements
3336 * NOTE: this is a TSO only workaround
3337 * if end byte alignment not correct move us
3338 * into the next dword */
3339 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3346 pull_size = min((unsigned int)4, skb->data_len);
3347 if (!__pskb_pull_tail(skb, pull_size)) {
3349 "__pskb_pull_tail failed.\n");
3350 dev_kfree_skb_any(skb);
3351 return NETDEV_TX_OK;
3353 len = skb->len - skb->data_len;
3362 /* reserve a descriptor for the offload context */
3363 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3367 /* Controller Erratum workaround */
3368 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3371 count += TXD_USE_COUNT(len, max_txd_pwr);
3373 if (adapter->pcix_82544)
3376 /* work-around for errata 10 and it applies to all controllers
3377 * in PCI-X mode, so add one more descriptor to the count
3379 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3383 nr_frags = skb_shinfo(skb)->nr_frags;
3384 for (f = 0; f < nr_frags; f++)
3385 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3387 if (adapter->pcix_82544)
3391 if (hw->tx_pkt_filtering &&
3392 (hw->mac_type == e1000_82573))
3393 e1000_transfer_dhcp_info(adapter, skb);
3395 if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
3396 /* Collision - tell upper layer to requeue */
3397 return NETDEV_TX_LOCKED;
3399 /* need: count + 2 desc gap to keep tail from touching
3400 * head, otherwise try next time */
3401 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3402 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3403 return NETDEV_TX_BUSY;
3406 if (unlikely(hw->mac_type == e1000_82547)) {
3407 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3408 netif_stop_queue(netdev);
3409 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3410 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3411 return NETDEV_TX_BUSY;
3415 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3416 tx_flags |= E1000_TX_FLAGS_VLAN;
3417 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3420 first = tx_ring->next_to_use;
3422 tso = e1000_tso(adapter, tx_ring, skb);
3424 dev_kfree_skb_any(skb);
3425 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3426 return NETDEV_TX_OK;
3430 tx_ring->last_tx_tso = 1;
3431 tx_flags |= E1000_TX_FLAGS_TSO;
3432 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3433 tx_flags |= E1000_TX_FLAGS_CSUM;
3435 /* Old method was to assume IPv4 packet by default if TSO was enabled.
3436 * 82571 hardware supports TSO capabilities for IPv6 as well...
3437 * no longer assume, we must. */
3438 if (likely(skb->protocol == htons(ETH_P_IP)))
3439 tx_flags |= E1000_TX_FLAGS_IPV4;
3441 e1000_tx_queue(adapter, tx_ring, tx_flags,
3442 e1000_tx_map(adapter, tx_ring, skb, first,
3443 max_per_txd, nr_frags, mss));
3445 netdev->trans_start = jiffies;
3447 /* Make sure there is space in the ring for the next send. */
3448 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3450 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3451 return NETDEV_TX_OK;
3455 * e1000_tx_timeout - Respond to a Tx Hang
3456 * @netdev: network interface device structure
3459 static void e1000_tx_timeout(struct net_device *netdev)
3461 struct e1000_adapter *adapter = netdev_priv(netdev);
3463 /* Do the reset outside of interrupt context */
3464 adapter->tx_timeout_count++;
3465 schedule_work(&adapter->reset_task);
3468 static void e1000_reset_task(struct work_struct *work)
3470 struct e1000_adapter *adapter =
3471 container_of(work, struct e1000_adapter, reset_task);
3473 e1000_reinit_locked(adapter);
3477 * e1000_get_stats - Get System Network Statistics
3478 * @netdev: network interface device structure
3480 * Returns the address of the device statistics structure.
3481 * The statistics are actually updated from the timer callback.
3484 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3486 struct e1000_adapter *adapter = netdev_priv(netdev);
3488 /* only return the current stats */
3489 return &adapter->net_stats;
3493 * e1000_change_mtu - Change the Maximum Transfer Unit
3494 * @netdev: network interface device structure
3495 * @new_mtu: new value for maximum frame size
3497 * Returns 0 on success, negative on failure
3500 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3502 struct e1000_adapter *adapter = netdev_priv(netdev);
3503 struct e1000_hw *hw = &adapter->hw;
3504 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3505 u16 eeprom_data = 0;
3507 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3508 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3509 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3513 /* Adapter-specific max frame size limits. */
3514 switch (hw->mac_type) {
3515 case e1000_undefined ... e1000_82542_rev2_1:
3517 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3518 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3523 /* Jumbo Frames not supported if:
3524 * - this is not an 82573L device
3525 * - ASPM is enabled in any way (0x1A bits 3:2) */
3526 e1000_read_eeprom(hw, EEPROM_INIT_3GIO_3, 1,
3528 if ((hw->device_id != E1000_DEV_ID_82573L) ||
3529 (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3530 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3532 "Jumbo Frames not supported.\n");
3537 /* ERT will be enabled later to enable wire speed receives */
3539 /* fall through to get support */
3542 case e1000_80003es2lan:
3543 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3544 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3545 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3550 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3554 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3555 * means we reserve 2 more, this pushes us to allocate from the next
3557 * i.e. RXBUFFER_2048 --> size-4096 slab */
3559 if (max_frame <= E1000_RXBUFFER_256)
3560 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3561 else if (max_frame <= E1000_RXBUFFER_512)
3562 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3563 else if (max_frame <= E1000_RXBUFFER_1024)
3564 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3565 else if (max_frame <= E1000_RXBUFFER_2048)
3566 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3567 else if (max_frame <= E1000_RXBUFFER_4096)
3568 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3569 else if (max_frame <= E1000_RXBUFFER_8192)
3570 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3571 else if (max_frame <= E1000_RXBUFFER_16384)
3572 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3574 /* adjust allocation if LPE protects us, and we aren't using SBP */
3575 if (!hw->tbi_compatibility_on &&
3576 ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3577 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3578 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3580 netdev->mtu = new_mtu;
3581 hw->max_frame_size = max_frame;
3583 if (netif_running(netdev))
3584 e1000_reinit_locked(adapter);
3590 * e1000_update_stats - Update the board statistics counters
3591 * @adapter: board private structure
3594 void e1000_update_stats(struct e1000_adapter *adapter)
3596 struct e1000_hw *hw = &adapter->hw;
3597 struct pci_dev *pdev = adapter->pdev;
3598 unsigned long flags;
3601 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3604 * Prevent stats update while adapter is being reset, or if the pci
3605 * connection is down.
3607 if (adapter->link_speed == 0)
3609 if (pci_channel_offline(pdev))
3612 spin_lock_irqsave(&adapter->stats_lock, flags);
3614 /* these counters are modified from e1000_tbi_adjust_stats,
3615 * called from the interrupt context, so they must only
3616 * be written while holding adapter->stats_lock
3619 adapter->stats.crcerrs += er32(CRCERRS);
3620 adapter->stats.gprc += er32(GPRC);
3621 adapter->stats.gorcl += er32(GORCL);
3622 adapter->stats.gorch += er32(GORCH);
3623 adapter->stats.bprc += er32(BPRC);
3624 adapter->stats.mprc += er32(MPRC);
3625 adapter->stats.roc += er32(ROC);
3627 if (hw->mac_type != e1000_ich8lan) {
3628 adapter->stats.prc64 += er32(PRC64);
3629 adapter->stats.prc127 += er32(PRC127);
3630 adapter->stats.prc255 += er32(PRC255);
3631 adapter->stats.prc511 += er32(PRC511);
3632 adapter->stats.prc1023 += er32(PRC1023);
3633 adapter->stats.prc1522 += er32(PRC1522);
3636 adapter->stats.symerrs += er32(SYMERRS);
3637 adapter->stats.mpc += er32(MPC);
3638 adapter->stats.scc += er32(SCC);
3639 adapter->stats.ecol += er32(ECOL);
3640 adapter->stats.mcc += er32(MCC);
3641 adapter->stats.latecol += er32(LATECOL);
3642 adapter->stats.dc += er32(DC);
3643 adapter->stats.sec += er32(SEC);
3644 adapter->stats.rlec += er32(RLEC);
3645 adapter->stats.xonrxc += er32(XONRXC);
3646 adapter->stats.xontxc += er32(XONTXC);
3647 adapter->stats.xoffrxc += er32(XOFFRXC);
3648 adapter->stats.xofftxc += er32(XOFFTXC);
3649 adapter->stats.fcruc += er32(FCRUC);
3650 adapter->stats.gptc += er32(GPTC);
3651 adapter->stats.gotcl += er32(GOTCL);
3652 adapter->stats.gotch += er32(GOTCH);
3653 adapter->stats.rnbc += er32(RNBC);
3654 adapter->stats.ruc += er32(RUC);
3655 adapter->stats.rfc += er32(RFC);
3656 adapter->stats.rjc += er32(RJC);
3657 adapter->stats.torl += er32(TORL);
3658 adapter->stats.torh += er32(TORH);
3659 adapter->stats.totl += er32(TOTL);
3660 adapter->stats.toth += er32(TOTH);
3661 adapter->stats.tpr += er32(TPR);
3663 if (hw->mac_type != e1000_ich8lan) {
3664 adapter->stats.ptc64 += er32(PTC64);
3665 adapter->stats.ptc127 += er32(PTC127);
3666 adapter->stats.ptc255 += er32(PTC255);
3667 adapter->stats.ptc511 += er32(PTC511);
3668 adapter->stats.ptc1023 += er32(PTC1023);
3669 adapter->stats.ptc1522 += er32(PTC1522);
3672 adapter->stats.mptc += er32(MPTC);
3673 adapter->stats.bptc += er32(BPTC);
3675 /* used for adaptive IFS */
3677 hw->tx_packet_delta = er32(TPT);
3678 adapter->stats.tpt += hw->tx_packet_delta;
3679 hw->collision_delta = er32(COLC);
3680 adapter->stats.colc += hw->collision_delta;
3682 if (hw->mac_type >= e1000_82543) {
3683 adapter->stats.algnerrc += er32(ALGNERRC);
3684 adapter->stats.rxerrc += er32(RXERRC);
3685 adapter->stats.tncrs += er32(TNCRS);
3686 adapter->stats.cexterr += er32(CEXTERR);
3687 adapter->stats.tsctc += er32(TSCTC);
3688 adapter->stats.tsctfc += er32(TSCTFC);
3690 if (hw->mac_type > e1000_82547_rev_2) {
3691 adapter->stats.iac += er32(IAC);
3692 adapter->stats.icrxoc += er32(ICRXOC);
3694 if (hw->mac_type != e1000_ich8lan) {
3695 adapter->stats.icrxptc += er32(ICRXPTC);
3696 adapter->stats.icrxatc += er32(ICRXATC);
3697 adapter->stats.ictxptc += er32(ICTXPTC);
3698 adapter->stats.ictxatc += er32(ICTXATC);
3699 adapter->stats.ictxqec += er32(ICTXQEC);
3700 adapter->stats.ictxqmtc += er32(ICTXQMTC);
3701 adapter->stats.icrxdmtc += er32(ICRXDMTC);
3705 /* Fill out the OS statistics structure */
3706 adapter->net_stats.multicast = adapter->stats.mprc;
3707 adapter->net_stats.collisions = adapter->stats.colc;
3711 /* RLEC on some newer hardware can be incorrect so build
3712 * our own version based on RUC and ROC */
3713 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3714 adapter->stats.crcerrs + adapter->stats.algnerrc +
3715 adapter->stats.ruc + adapter->stats.roc +
3716 adapter->stats.cexterr;
3717 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3718 adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3719 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3720 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3721 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3724 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3725 adapter->net_stats.tx_errors = adapter->stats.txerrc;
3726 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3727 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3728 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3729 if (hw->bad_tx_carr_stats_fd &&
3730 adapter->link_duplex == FULL_DUPLEX) {
3731 adapter->net_stats.tx_carrier_errors = 0;
3732 adapter->stats.tncrs = 0;
3735 /* Tx Dropped needs to be maintained elsewhere */
3738 if (hw->media_type == e1000_media_type_copper) {
3739 if ((adapter->link_speed == SPEED_1000) &&
3740 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3741 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3742 adapter->phy_stats.idle_errors += phy_tmp;
3745 if ((hw->mac_type <= e1000_82546) &&
3746 (hw->phy_type == e1000_phy_m88) &&
3747 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3748 adapter->phy_stats.receive_errors += phy_tmp;
3751 /* Management Stats */
3752 if (hw->has_smbus) {
3753 adapter->stats.mgptc += er32(MGTPTC);
3754 adapter->stats.mgprc += er32(MGTPRC);
3755 adapter->stats.mgpdc += er32(MGTPDC);
3758 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3762 * e1000_intr_msi - Interrupt Handler
3763 * @irq: interrupt number
3764 * @data: pointer to a network interface device structure
3767 static irqreturn_t e1000_intr_msi(int irq, void *data)
3769 struct net_device *netdev = data;
3770 struct e1000_adapter *adapter = netdev_priv(netdev);
3771 struct e1000_hw *hw = &adapter->hw;
3772 #ifndef CONFIG_E1000_NAPI
3775 u32 icr = er32(ICR);
3777 /* in NAPI mode read ICR disables interrupts using IAM */
3779 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3780 hw->get_link_status = 1;
3781 /* 80003ES2LAN workaround-- For packet buffer work-around on
3782 * link down event; disable receives here in the ISR and reset
3783 * adapter in watchdog */
3784 if (netif_carrier_ok(netdev) &&
3785 (hw->mac_type == e1000_80003es2lan)) {
3786 /* disable receives */
3787 u32 rctl = er32(RCTL);
3788 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3790 /* guard against interrupt when we're going down */
3791 if (!test_bit(__E1000_DOWN, &adapter->flags))
3792 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3795 #ifdef CONFIG_E1000_NAPI
3796 if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3797 adapter->total_tx_bytes = 0;
3798 adapter->total_tx_packets = 0;
3799 adapter->total_rx_bytes = 0;
3800 adapter->total_rx_packets = 0;
3801 __netif_rx_schedule(netdev, &adapter->napi);
3803 e1000_irq_enable(adapter);
3805 adapter->total_tx_bytes = 0;
3806 adapter->total_rx_bytes = 0;
3807 adapter->total_tx_packets = 0;
3808 adapter->total_rx_packets = 0;
3810 for (i = 0; i < E1000_MAX_INTR; i++)
3811 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3812 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3815 if (likely(adapter->itr_setting & 3))
3816 e1000_set_itr(adapter);
3823 * e1000_intr - Interrupt Handler
3824 * @irq: interrupt number
3825 * @data: pointer to a network interface device structure
3828 static irqreturn_t e1000_intr(int irq, void *data)
3830 struct net_device *netdev = data;
3831 struct e1000_adapter *adapter = netdev_priv(netdev);
3832 struct e1000_hw *hw = &adapter->hw;
3833 u32 rctl, icr = er32(ICR);
3834 #ifndef CONFIG_E1000_NAPI
3838 return IRQ_NONE; /* Not our interrupt */
3840 #ifdef CONFIG_E1000_NAPI
3841 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3842 * not set, then the adapter didn't send an interrupt */
3843 if (unlikely(hw->mac_type >= e1000_82571 &&
3844 !(icr & E1000_ICR_INT_ASSERTED)))
3847 /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No
3848 * need for the IMC write */
3851 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3852 hw->get_link_status = 1;
3853 /* 80003ES2LAN workaround--
3854 * For packet buffer work-around on link down event;
3855 * disable receives here in the ISR and
3856 * reset adapter in watchdog
3858 if (netif_carrier_ok(netdev) &&
3859 (hw->mac_type == e1000_80003es2lan)) {
3860 /* disable receives */
3862 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3864 /* guard against interrupt when we're going down */
3865 if (!test_bit(__E1000_DOWN, &adapter->flags))
3866 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3869 #ifdef CONFIG_E1000_NAPI
3870 if (unlikely(hw->mac_type < e1000_82571)) {
3871 /* disable interrupts, without the synchronize_irq bit */
3873 E1000_WRITE_FLUSH();
3875 if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3876 adapter->total_tx_bytes = 0;
3877 adapter->total_tx_packets = 0;
3878 adapter->total_rx_bytes = 0;
3879 adapter->total_rx_packets = 0;
3880 __netif_rx_schedule(netdev, &adapter->napi);
3882 /* this really should not happen! if it does it is basically a
3883 * bug, but not a hard error, so enable ints and continue */
3884 e1000_irq_enable(adapter);
3886 /* Writing IMC and IMS is needed for 82547.
3887 * Due to Hub Link bus being occupied, an interrupt
3888 * de-assertion message is not able to be sent.
3889 * When an interrupt assertion message is generated later,
3890 * two messages are re-ordered and sent out.
3891 * That causes APIC to think 82547 is in de-assertion
3892 * state, while 82547 is in assertion state, resulting
3893 * in dead lock. Writing IMC forces 82547 into
3894 * de-assertion state.
3896 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3899 adapter->total_tx_bytes = 0;
3900 adapter->total_rx_bytes = 0;
3901 adapter->total_tx_packets = 0;
3902 adapter->total_rx_packets = 0;
3904 for (i = 0; i < E1000_MAX_INTR; i++)
3905 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3906 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3909 if (likely(adapter->itr_setting & 3))
3910 e1000_set_itr(adapter);
3912 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3913 e1000_irq_enable(adapter);
3919 #ifdef CONFIG_E1000_NAPI
3921 * e1000_clean - NAPI Rx polling callback
3922 * @adapter: board private structure
3925 static int e1000_clean(struct napi_struct *napi, int budget)
3927 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3928 struct net_device *poll_dev = adapter->netdev;
3929 int tx_cleaned = 0, work_done = 0;
3931 /* Must NOT use netdev_priv macro here. */
3932 adapter = poll_dev->priv;
3934 /* e1000_clean is called per-cpu. This lock protects
3935 * tx_ring[0] from being cleaned by multiple cpus
3936 * simultaneously. A failure obtaining the lock means
3937 * tx_ring[0] is currently being cleaned anyway. */
3938 if (spin_trylock(&adapter->tx_queue_lock)) {
3939 tx_cleaned = e1000_clean_tx_irq(adapter,
3940 &adapter->tx_ring[0]);
3941 spin_unlock(&adapter->tx_queue_lock);
3944 adapter->clean_rx(adapter, &adapter->rx_ring[0],
3945 &work_done, budget);
3950 /* If budget not fully consumed, exit the polling mode */
3951 if (work_done < budget) {
3952 if (likely(adapter->itr_setting & 3))
3953 e1000_set_itr(adapter);
3954 netif_rx_complete(poll_dev, napi);
3955 e1000_irq_enable(adapter);
3963 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3964 * @adapter: board private structure
3967 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3968 struct e1000_tx_ring *tx_ring)
3970 struct e1000_hw *hw = &adapter->hw;
3971 struct net_device *netdev = adapter->netdev;
3972 struct e1000_tx_desc *tx_desc, *eop_desc;
3973 struct e1000_buffer *buffer_info;
3974 unsigned int i, eop;
3975 #ifdef CONFIG_E1000_NAPI
3976 unsigned int count = 0;
3978 bool cleaned = false;
3979 unsigned int total_tx_bytes=0, total_tx_packets=0;
3981 i = tx_ring->next_to_clean;
3982 eop = tx_ring->buffer_info[i].next_to_watch;
3983 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3985 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3986 for (cleaned = false; !cleaned; ) {
3987 tx_desc = E1000_TX_DESC(*tx_ring, i);
3988 buffer_info = &tx_ring->buffer_info[i];
3989 cleaned = (i == eop);
3992 struct sk_buff *skb = buffer_info->skb;
3993 unsigned int segs, bytecount;
3994 segs = skb_shinfo(skb)->gso_segs ?: 1;
3995 /* multiply data chunks by size of headers */
3996 bytecount = ((segs - 1) * skb_headlen(skb)) +
3998 total_tx_packets += segs;
3999 total_tx_bytes += bytecount;
4001 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
4002 tx_desc->upper.data = 0;
4004 if (unlikely(++i == tx_ring->count)) i = 0;
4007 eop = tx_ring->buffer_info[i].next_to_watch;
4008 eop_desc = E1000_TX_DESC(*tx_ring, eop);
4009 #ifdef CONFIG_E1000_NAPI
4010 #define E1000_TX_WEIGHT 64
4011 /* weight of a sort for tx, to avoid endless transmit cleanup */
4012 if (count++ == E1000_TX_WEIGHT) break;
4016 tx_ring->next_to_clean = i;
4018 #define TX_WAKE_THRESHOLD 32
4019 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
4020 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
4021 /* Make sure that anybody stopping the queue after this
4022 * sees the new next_to_clean.
4025 if (netif_queue_stopped(netdev)) {
4026 netif_wake_queue(netdev);
4027 ++adapter->restart_queue;
4031 if (adapter->detect_tx_hung) {
4032 /* Detect a transmit hang in hardware, this serializes the
4033 * check with the clearing of time_stamp and movement of i */
4034 adapter->detect_tx_hung = false;
4035 if (tx_ring->buffer_info[eop].dma &&
4036 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
4037 (adapter->tx_timeout_factor * HZ))
4038 && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
4040 /* detected Tx unit hang */
4041 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
4045 " next_to_use <%x>\n"
4046 " next_to_clean <%x>\n"
4047 "buffer_info[next_to_clean]\n"
4048 " time_stamp <%lx>\n"
4049 " next_to_watch <%x>\n"
4051 " next_to_watch.status <%x>\n",
4052 (unsigned long)((tx_ring - adapter->tx_ring) /
4053 sizeof(struct e1000_tx_ring)),
4054 readl(hw->hw_addr + tx_ring->tdh),
4055 readl(hw->hw_addr + tx_ring->tdt),
4056 tx_ring->next_to_use,
4057 tx_ring->next_to_clean,
4058 tx_ring->buffer_info[eop].time_stamp,
4061 eop_desc->upper.fields.status);
4062 netif_stop_queue(netdev);
4065 adapter->total_tx_bytes += total_tx_bytes;
4066 adapter->total_tx_packets += total_tx_packets;
4067 adapter->net_stats.tx_bytes += total_tx_bytes;
4068 adapter->net_stats.tx_packets += total_tx_packets;
4073 * e1000_rx_checksum - Receive Checksum Offload for 82543
4074 * @adapter: board private structure
4075 * @status_err: receive descriptor status and error fields
4076 * @csum: receive descriptor csum field
4077 * @sk_buff: socket buffer with received data
4080 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
4081 u32 csum, struct sk_buff *skb)
4083 struct e1000_hw *hw = &adapter->hw;
4084 u16 status = (u16)status_err;
4085 u8 errors = (u8)(status_err >> 24);
4086 skb->ip_summed = CHECKSUM_NONE;
4088 /* 82543 or newer only */
4089 if (unlikely(hw->mac_type < e1000_82543)) return;
4090 /* Ignore Checksum bit is set */
4091 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
4092 /* TCP/UDP checksum error bit is set */
4093 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4094 /* let the stack verify checksum errors */
4095 adapter->hw_csum_err++;
4098 /* TCP/UDP Checksum has not been calculated */
4099 if (hw->mac_type <= e1000_82547_rev_2) {
4100 if (!(status & E1000_RXD_STAT_TCPCS))
4103 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
4106 /* It must be a TCP or UDP packet with a valid checksum */
4107 if (likely(status & E1000_RXD_STAT_TCPCS)) {
4108 /* TCP checksum is good */
4109 skb->ip_summed = CHECKSUM_UNNECESSARY;
4110 } else if (hw->mac_type > e1000_82547_rev_2) {
4111 /* IP fragment with UDP payload */
4112 /* Hardware complements the payload checksum, so we undo it
4113 * and then put the value in host order for further stack use.
4115 __sum16 sum = (__force __sum16)htons(csum);
4116 skb->csum = csum_unfold(~sum);
4117 skb->ip_summed = CHECKSUM_COMPLETE;
4119 adapter->hw_csum_good++;
4123 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4124 * @adapter: board private structure
4126 #ifdef CONFIG_E1000_NAPI
4127 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4128 struct e1000_rx_ring *rx_ring,
4129 int *work_done, int work_to_do)
4131 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4132 struct e1000_rx_ring *rx_ring)
4135 struct e1000_hw *hw = &adapter->hw;
4136 struct net_device *netdev = adapter->netdev;
4137 struct pci_dev *pdev = adapter->pdev;
4138 struct e1000_rx_desc *rx_desc, *next_rxd;
4139 struct e1000_buffer *buffer_info, *next_buffer;
4140 unsigned long flags;
4144 int cleaned_count = 0;
4145 bool cleaned = false;
4146 unsigned int total_rx_bytes=0, total_rx_packets=0;
4148 i = rx_ring->next_to_clean;
4149 rx_desc = E1000_RX_DESC(*rx_ring, i);
4150 buffer_info = &rx_ring->buffer_info[i];
4152 while (rx_desc->status & E1000_RXD_STAT_DD) {
4153 struct sk_buff *skb;
4156 #ifdef CONFIG_E1000_NAPI
4157 if (*work_done >= work_to_do)
4161 status = rx_desc->status;
4162 skb = buffer_info->skb;
4163 buffer_info->skb = NULL;
4165 prefetch(skb->data - NET_IP_ALIGN);
4167 if (++i == rx_ring->count) i = 0;
4168 next_rxd = E1000_RX_DESC(*rx_ring, i);
4171 next_buffer = &rx_ring->buffer_info[i];
4175 pci_unmap_single(pdev,
4177 buffer_info->length,
4178 PCI_DMA_FROMDEVICE);
4180 length = le16_to_cpu(rx_desc->length);
4182 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4183 /* All receives must fit into a single buffer */
4184 E1000_DBG("%s: Receive packet consumed multiple"
4185 " buffers\n", netdev->name);
4187 buffer_info->skb = skb;
4191 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4192 last_byte = *(skb->data + length - 1);
4193 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4195 spin_lock_irqsave(&adapter->stats_lock, flags);
4196 e1000_tbi_adjust_stats(hw, &adapter->stats,
4198 spin_unlock_irqrestore(&adapter->stats_lock,
4203 buffer_info->skb = skb;
4208 /* adjust length to remove Ethernet CRC, this must be
4209 * done after the TBI_ACCEPT workaround above */
4212 /* probably a little skewed due to removing CRC */
4213 total_rx_bytes += length;
4216 /* code added for copybreak, this should improve
4217 * performance for small packets with large amounts
4218 * of reassembly being done in the stack */
4219 if (length < copybreak) {
4220 struct sk_buff *new_skb =
4221 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4223 skb_reserve(new_skb, NET_IP_ALIGN);
4224 skb_copy_to_linear_data_offset(new_skb,
4230 /* save the skb in buffer_info as good */
4231 buffer_info->skb = skb;
4234 /* else just continue with the old one */
4236 /* end copybreak code */
4237 skb_put(skb, length);
4239 /* Receive Checksum Offload */
4240 e1000_rx_checksum(adapter,
4242 ((u32)(rx_desc->errors) << 24),
4243 le16_to_cpu(rx_desc->csum), skb);
4245 skb->protocol = eth_type_trans(skb, netdev);
4246 #ifdef CONFIG_E1000_NAPI
4247 if (unlikely(adapter->vlgrp &&
4248 (status & E1000_RXD_STAT_VP))) {
4249 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4250 le16_to_cpu(rx_desc->special));
4252 netif_receive_skb(skb);
4254 #else /* CONFIG_E1000_NAPI */
4255 if (unlikely(adapter->vlgrp &&
4256 (status & E1000_RXD_STAT_VP))) {
4257 vlan_hwaccel_rx(skb, adapter->vlgrp,
4258 le16_to_cpu(rx_desc->special));
4262 #endif /* CONFIG_E1000_NAPI */
4263 netdev->last_rx = jiffies;
4266 rx_desc->status = 0;
4268 /* return some buffers to hardware, one at a time is too slow */
4269 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4270 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4274 /* use prefetched values */
4276 buffer_info = next_buffer;
4278 rx_ring->next_to_clean = i;
4280 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4282 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4284 adapter->total_rx_packets += total_rx_packets;
4285 adapter->total_rx_bytes += total_rx_bytes;
4286 adapter->net_stats.rx_bytes += total_rx_bytes;
4287 adapter->net_stats.rx_packets += total_rx_packets;
4292 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4293 * @adapter: board private structure
4296 #ifdef CONFIG_E1000_NAPI
4297 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4298 struct e1000_rx_ring *rx_ring,
4299 int *work_done, int work_to_do)
4301 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4302 struct e1000_rx_ring *rx_ring)
4305 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
4306 struct net_device *netdev = adapter->netdev;
4307 struct pci_dev *pdev = adapter->pdev;
4308 struct e1000_buffer *buffer_info, *next_buffer;
4309 struct e1000_ps_page *ps_page;
4310 struct e1000_ps_page_dma *ps_page_dma;
4311 struct sk_buff *skb;
4313 u32 length, staterr;
4314 int cleaned_count = 0;
4315 bool cleaned = false;
4316 unsigned int total_rx_bytes=0, total_rx_packets=0;
4318 i = rx_ring->next_to_clean;
4319 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4320 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4321 buffer_info = &rx_ring->buffer_info[i];
4323 while (staterr & E1000_RXD_STAT_DD) {
4324 ps_page = &rx_ring->ps_page[i];
4325 ps_page_dma = &rx_ring->ps_page_dma[i];
4326 #ifdef CONFIG_E1000_NAPI
4327 if (unlikely(*work_done >= work_to_do))
4331 skb = buffer_info->skb;
4333 /* in the packet split case this is header only */
4334 prefetch(skb->data - NET_IP_ALIGN);
4336 if (++i == rx_ring->count) i = 0;
4337 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
4340 next_buffer = &rx_ring->buffer_info[i];
4344 pci_unmap_single(pdev, buffer_info->dma,
4345 buffer_info->length,
4346 PCI_DMA_FROMDEVICE);
4348 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
4349 E1000_DBG("%s: Packet Split buffers didn't pick up"
4350 " the full packet\n", netdev->name);
4351 dev_kfree_skb_irq(skb);
4355 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
4356 dev_kfree_skb_irq(skb);
4360 length = le16_to_cpu(rx_desc->wb.middle.length0);
4362 if (unlikely(!length)) {
4363 E1000_DBG("%s: Last part of the packet spanning"
4364 " multiple descriptors\n", netdev->name);
4365 dev_kfree_skb_irq(skb);
4370 skb_put(skb, length);
4373 /* this looks ugly, but it seems compiler issues make it
4374 more efficient than reusing j */
4375 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4377 /* page alloc/put takes too long and effects small packet
4378 * throughput, so unsplit small packets and save the alloc/put*/
4379 if (l1 && (l1 <= copybreak) && ((length + l1) <= adapter->rx_ps_bsize0)) {
4381 /* there is no documentation about how to call
4382 * kmap_atomic, so we can't hold the mapping
4384 pci_dma_sync_single_for_cpu(pdev,
4385 ps_page_dma->ps_page_dma[0],
4387 PCI_DMA_FROMDEVICE);
4388 vaddr = kmap_atomic(ps_page->ps_page[0],
4389 KM_SKB_DATA_SOFTIRQ);
4390 memcpy(skb_tail_pointer(skb), vaddr, l1);
4391 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4392 pci_dma_sync_single_for_device(pdev,
4393 ps_page_dma->ps_page_dma[0],
4394 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4395 /* remove the CRC */
4402 for (j = 0; j < adapter->rx_ps_pages; j++) {
4403 if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
4405 pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4406 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4407 ps_page_dma->ps_page_dma[j] = 0;
4408 skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4410 ps_page->ps_page[j] = NULL;
4412 skb->data_len += length;
4413 skb->truesize += length;
4416 /* strip the ethernet crc, problem is we're using pages now so
4417 * this whole operation can get a little cpu intensive */
4418 pskb_trim(skb, skb->len - 4);
4421 total_rx_bytes += skb->len;
4424 e1000_rx_checksum(adapter, staterr,
4425 le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4426 skb->protocol = eth_type_trans(skb, netdev);
4428 if (likely(rx_desc->wb.upper.header_status &
4429 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4430 adapter->rx_hdr_split++;
4431 #ifdef CONFIG_E1000_NAPI
4432 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4433 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4434 le16_to_cpu(rx_desc->wb.middle.vlan));
4436 netif_receive_skb(skb);
4438 #else /* CONFIG_E1000_NAPI */
4439 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4440 vlan_hwaccel_rx(skb, adapter->vlgrp,
4441 le16_to_cpu(rx_desc->wb.middle.vlan));
4445 #endif /* CONFIG_E1000_NAPI */
4446 netdev->last_rx = jiffies;
4449 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4450 buffer_info->skb = NULL;
4452 /* return some buffers to hardware, one at a time is too slow */
4453 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4454 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4458 /* use prefetched values */
4460 buffer_info = next_buffer;
4462 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4464 rx_ring->next_to_clean = i;
4466 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4468 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4470 adapter->total_rx_packets += total_rx_packets;
4471 adapter->total_rx_bytes += total_rx_bytes;
4472 adapter->net_stats.rx_bytes += total_rx_bytes;
4473 adapter->net_stats.rx_packets += total_rx_packets;
4478 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4479 * @adapter: address of board private structure
4482 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4483 struct e1000_rx_ring *rx_ring,
4486 struct e1000_hw *hw = &adapter->hw;
4487 struct net_device *netdev = adapter->netdev;
4488 struct pci_dev *pdev = adapter->pdev;
4489 struct e1000_rx_desc *rx_desc;
4490 struct e1000_buffer *buffer_info;
4491 struct sk_buff *skb;
4493 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4495 i = rx_ring->next_to_use;
4496 buffer_info = &rx_ring->buffer_info[i];
4498 while (cleaned_count--) {
4499 skb = buffer_info->skb;
4505 skb = netdev_alloc_skb(netdev, bufsz);
4506 if (unlikely(!skb)) {
4507 /* Better luck next round */
4508 adapter->alloc_rx_buff_failed++;
4512 /* Fix for errata 23, can't cross 64kB boundary */
4513 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4514 struct sk_buff *oldskb = skb;
4515 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4516 "at %p\n", bufsz, skb->data);
4517 /* Try again, without freeing the previous */
4518 skb = netdev_alloc_skb(netdev, bufsz);
4519 /* Failed allocation, critical failure */
4521 dev_kfree_skb(oldskb);
4525 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4528 dev_kfree_skb(oldskb);
4529 break; /* while !buffer_info->skb */
4532 /* Use new allocation */
4533 dev_kfree_skb(oldskb);
4535 /* Make buffer alignment 2 beyond a 16 byte boundary
4536 * this will result in a 16 byte aligned IP header after
4537 * the 14 byte MAC header is removed
4539 skb_reserve(skb, NET_IP_ALIGN);
4541 buffer_info->skb = skb;
4542 buffer_info->length = adapter->rx_buffer_len;
4544 buffer_info->dma = pci_map_single(pdev,
4546 adapter->rx_buffer_len,
4547 PCI_DMA_FROMDEVICE);
4549 /* Fix for errata 23, can't cross 64kB boundary */
4550 if (!e1000_check_64k_bound(adapter,
4551 (void *)(unsigned long)buffer_info->dma,
4552 adapter->rx_buffer_len)) {
4553 DPRINTK(RX_ERR, ERR,
4554 "dma align check failed: %u bytes at %p\n",
4555 adapter->rx_buffer_len,
4556 (void *)(unsigned long)buffer_info->dma);
4558 buffer_info->skb = NULL;
4560 pci_unmap_single(pdev, buffer_info->dma,
4561 adapter->rx_buffer_len,
4562 PCI_DMA_FROMDEVICE);
4564 break; /* while !buffer_info->skb */
4566 rx_desc = E1000_RX_DESC(*rx_ring, i);
4567 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4569 if (unlikely(++i == rx_ring->count))
4571 buffer_info = &rx_ring->buffer_info[i];
4574 if (likely(rx_ring->next_to_use != i)) {
4575 rx_ring->next_to_use = i;
4576 if (unlikely(i-- == 0))
4577 i = (rx_ring->count - 1);
4579 /* Force memory writes to complete before letting h/w
4580 * know there are new descriptors to fetch. (Only
4581 * applicable for weak-ordered memory model archs,
4582 * such as IA-64). */
4584 writel(i, hw->hw_addr + rx_ring->rdt);
4589 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4590 * @adapter: address of board private structure
4593 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4594 struct e1000_rx_ring *rx_ring,
4597 struct e1000_hw *hw = &adapter->hw;
4598 struct net_device *netdev = adapter->netdev;
4599 struct pci_dev *pdev = adapter->pdev;
4600 union e1000_rx_desc_packet_split *rx_desc;
4601 struct e1000_buffer *buffer_info;
4602 struct e1000_ps_page *ps_page;
4603 struct e1000_ps_page_dma *ps_page_dma;
4604 struct sk_buff *skb;
4607 i = rx_ring->next_to_use;
4608 buffer_info = &rx_ring->buffer_info[i];
4609 ps_page = &rx_ring->ps_page[i];
4610 ps_page_dma = &rx_ring->ps_page_dma[i];
4612 while (cleaned_count--) {
4613 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4615 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4616 if (j < adapter->rx_ps_pages) {
4617 if (likely(!ps_page->ps_page[j])) {
4618 ps_page->ps_page[j] =
4619 alloc_page(GFP_ATOMIC);
4620 if (unlikely(!ps_page->ps_page[j])) {
4621 adapter->alloc_rx_buff_failed++;
4624 ps_page_dma->ps_page_dma[j] =
4626 ps_page->ps_page[j],
4628 PCI_DMA_FROMDEVICE);
4630 /* Refresh the desc even if buffer_addrs didn't
4631 * change because each write-back erases
4634 rx_desc->read.buffer_addr[j+1] =
4635 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4637 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
4640 skb = netdev_alloc_skb(netdev,
4641 adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4643 if (unlikely(!skb)) {
4644 adapter->alloc_rx_buff_failed++;
4648 /* Make buffer alignment 2 beyond a 16 byte boundary
4649 * this will result in a 16 byte aligned IP header after
4650 * the 14 byte MAC header is removed
4652 skb_reserve(skb, NET_IP_ALIGN);
4654 buffer_info->skb = skb;
4655 buffer_info->length = adapter->rx_ps_bsize0;
4656 buffer_info->dma = pci_map_single(pdev, skb->data,
4657 adapter->rx_ps_bsize0,
4658 PCI_DMA_FROMDEVICE);
4660 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4662 if (unlikely(++i == rx_ring->count)) i = 0;
4663 buffer_info = &rx_ring->buffer_info[i];
4664 ps_page = &rx_ring->ps_page[i];
4665 ps_page_dma = &rx_ring->ps_page_dma[i];
4669 if (likely(rx_ring->next_to_use != i)) {
4670 rx_ring->next_to_use = i;
4671 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4673 /* Force memory writes to complete before letting h/w
4674 * know there are new descriptors to fetch. (Only
4675 * applicable for weak-ordered memory model archs,
4676 * such as IA-64). */
4678 /* Hardware increments by 16 bytes, but packet split
4679 * descriptors are 32 bytes...so we increment tail
4682 writel(i<<1, hw->hw_addr + rx_ring->rdt);
4687 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4691 static void e1000_smartspeed(struct e1000_adapter *adapter)
4693 struct e1000_hw *hw = &adapter->hw;
4697 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4698 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4701 if (adapter->smartspeed == 0) {
4702 /* If Master/Slave config fault is asserted twice,
4703 * we assume back-to-back */
4704 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4705 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4706 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4707 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4708 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4709 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4710 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4711 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4713 adapter->smartspeed++;
4714 if (!e1000_phy_setup_autoneg(hw) &&
4715 !e1000_read_phy_reg(hw, PHY_CTRL,
4717 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4718 MII_CR_RESTART_AUTO_NEG);
4719 e1000_write_phy_reg(hw, PHY_CTRL,
4724 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4725 /* If still no link, perhaps using 2/3 pair cable */
4726 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4727 phy_ctrl |= CR_1000T_MS_ENABLE;
4728 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4729 if (!e1000_phy_setup_autoneg(hw) &&
4730 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4731 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4732 MII_CR_RESTART_AUTO_NEG);
4733 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4736 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4737 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4738 adapter->smartspeed = 0;
4748 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4754 return e1000_mii_ioctl(netdev, ifr, cmd);
4767 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4770 struct e1000_adapter *adapter = netdev_priv(netdev);
4771 struct e1000_hw *hw = &adapter->hw;
4772 struct mii_ioctl_data *data = if_mii(ifr);
4776 unsigned long flags;
4778 if (hw->media_type != e1000_media_type_copper)
4783 data->phy_id = hw->phy_addr;
4786 if (!capable(CAP_NET_ADMIN))
4788 spin_lock_irqsave(&adapter->stats_lock, flags);
4789 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4791 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4794 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4797 if (!capable(CAP_NET_ADMIN))
4799 if (data->reg_num & ~(0x1F))
4801 mii_reg = data->val_in;
4802 spin_lock_irqsave(&adapter->stats_lock, flags);
4803 if (e1000_write_phy_reg(hw, data->reg_num,
4805 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4808 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4809 if (hw->media_type == e1000_media_type_copper) {
4810 switch (data->reg_num) {
4812 if (mii_reg & MII_CR_POWER_DOWN)
4814 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4816 hw->autoneg_advertised = 0x2F;
4819 spddplx = SPEED_1000;
4820 else if (mii_reg & 0x2000)
4821 spddplx = SPEED_100;
4824 spddplx += (mii_reg & 0x100)
4827 retval = e1000_set_spd_dplx(adapter,
4832 if (netif_running(adapter->netdev))
4833 e1000_reinit_locked(adapter);
4835 e1000_reset(adapter);
4837 case M88E1000_PHY_SPEC_CTRL:
4838 case M88E1000_EXT_PHY_SPEC_CTRL:
4839 if (e1000_phy_reset(hw))
4844 switch (data->reg_num) {
4846 if (mii_reg & MII_CR_POWER_DOWN)
4848 if (netif_running(adapter->netdev))
4849 e1000_reinit_locked(adapter);
4851 e1000_reset(adapter);
4859 return E1000_SUCCESS;
4862 void e1000_pci_set_mwi(struct e1000_hw *hw)
4864 struct e1000_adapter *adapter = hw->back;
4865 int ret_val = pci_set_mwi(adapter->pdev);
4868 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4871 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4873 struct e1000_adapter *adapter = hw->back;
4875 pci_clear_mwi(adapter->pdev);
4878 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4880 struct e1000_adapter *adapter = hw->back;
4881 return pcix_get_mmrbc(adapter->pdev);
4884 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4886 struct e1000_adapter *adapter = hw->back;
4887 pcix_set_mmrbc(adapter->pdev, mmrbc);
4890 s32 e1000_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
4892 struct e1000_adapter *adapter = hw->back;
4895 cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4897 return -E1000_ERR_CONFIG;
4899 pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4901 return E1000_SUCCESS;
4904 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4909 static void e1000_vlan_rx_register(struct net_device *netdev,
4910 struct vlan_group *grp)
4912 struct e1000_adapter *adapter = netdev_priv(netdev);
4913 struct e1000_hw *hw = &adapter->hw;
4916 if (!test_bit(__E1000_DOWN, &adapter->flags))
4917 e1000_irq_disable(adapter);
4918 adapter->vlgrp = grp;
4921 /* enable VLAN tag insert/strip */
4923 ctrl |= E1000_CTRL_VME;
4926 if (adapter->hw.mac_type != e1000_ich8lan) {
4927 /* enable VLAN receive filtering */
4929 rctl &= ~E1000_RCTL_CFIEN;
4931 e1000_update_mng_vlan(adapter);
4934 /* disable VLAN tag insert/strip */
4936 ctrl &= ~E1000_CTRL_VME;
4939 if (adapter->hw.mac_type != e1000_ich8lan) {
4940 if (adapter->mng_vlan_id !=
4941 (u16)E1000_MNG_VLAN_NONE) {
4942 e1000_vlan_rx_kill_vid(netdev,
4943 adapter->mng_vlan_id);
4944 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4949 if (!test_bit(__E1000_DOWN, &adapter->flags))
4950 e1000_irq_enable(adapter);
4953 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4955 struct e1000_adapter *adapter = netdev_priv(netdev);
4956 struct e1000_hw *hw = &adapter->hw;
4959 if ((hw->mng_cookie.status &
4960 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4961 (vid == adapter->mng_vlan_id))
4963 /* add VID to filter table */
4964 index = (vid >> 5) & 0x7F;
4965 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4966 vfta |= (1 << (vid & 0x1F));
4967 e1000_write_vfta(hw, index, vfta);
4970 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4972 struct e1000_adapter *adapter = netdev_priv(netdev);
4973 struct e1000_hw *hw = &adapter->hw;
4976 if (!test_bit(__E1000_DOWN, &adapter->flags))
4977 e1000_irq_disable(adapter);
4978 vlan_group_set_device(adapter->vlgrp, vid, NULL);
4979 if (!test_bit(__E1000_DOWN, &adapter->flags))
4980 e1000_irq_enable(adapter);
4982 if ((hw->mng_cookie.status &
4983 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4984 (vid == adapter->mng_vlan_id)) {
4985 /* release control to f/w */
4986 e1000_release_hw_control(adapter);
4990 /* remove VID from filter table */
4991 index = (vid >> 5) & 0x7F;
4992 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4993 vfta &= ~(1 << (vid & 0x1F));
4994 e1000_write_vfta(hw, index, vfta);
4997 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4999 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5001 if (adapter->vlgrp) {
5003 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5004 if (!vlan_group_get_device(adapter->vlgrp, vid))
5006 e1000_vlan_rx_add_vid(adapter->netdev, vid);
5011 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
5013 struct e1000_hw *hw = &adapter->hw;
5017 /* Fiber NICs only allow 1000 gbps Full duplex */
5018 if ((hw->media_type == e1000_media_type_fiber) &&
5019 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5020 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5025 case SPEED_10 + DUPLEX_HALF:
5026 hw->forced_speed_duplex = e1000_10_half;
5028 case SPEED_10 + DUPLEX_FULL:
5029 hw->forced_speed_duplex = e1000_10_full;
5031 case SPEED_100 + DUPLEX_HALF:
5032 hw->forced_speed_duplex = e1000_100_half;
5034 case SPEED_100 + DUPLEX_FULL:
5035 hw->forced_speed_duplex = e1000_100_full;
5037 case SPEED_1000 + DUPLEX_FULL:
5039 hw->autoneg_advertised = ADVERTISE_1000_FULL;
5041 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5043 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5049 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5051 struct net_device *netdev = pci_get_drvdata(pdev);
5052 struct e1000_adapter *adapter = netdev_priv(netdev);
5053 struct e1000_hw *hw = &adapter->hw;
5054 u32 ctrl, ctrl_ext, rctl, status;
5055 u32 wufc = adapter->wol;
5060 netif_device_detach(netdev);
5062 if (netif_running(netdev)) {
5063 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5064 e1000_down(adapter);
5068 retval = pci_save_state(pdev);
5073 status = er32(STATUS);
5074 if (status & E1000_STATUS_LU)
5075 wufc &= ~E1000_WUFC_LNKC;
5078 e1000_setup_rctl(adapter);
5079 e1000_set_rx_mode(netdev);
5081 /* turn on all-multi mode if wake on multicast is enabled */
5082 if (wufc & E1000_WUFC_MC) {
5084 rctl |= E1000_RCTL_MPE;
5088 if (hw->mac_type >= e1000_82540) {
5090 /* advertise wake from D3Cold */
5091 #define E1000_CTRL_ADVD3WUC 0x00100000
5092 /* phy power management enable */
5093 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5094 ctrl |= E1000_CTRL_ADVD3WUC |
5095 E1000_CTRL_EN_PHY_PWR_MGMT;
5099 if (hw->media_type == e1000_media_type_fiber ||
5100 hw->media_type == e1000_media_type_internal_serdes) {
5101 /* keep the laser running in D3 */
5102 ctrl_ext = er32(CTRL_EXT);
5103 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5104 ew32(CTRL_EXT, ctrl_ext);
5107 /* Allow time for pending master requests to run */
5108 e1000_disable_pciex_master(hw);
5110 ew32(WUC, E1000_WUC_PME_EN);
5112 pci_enable_wake(pdev, PCI_D3hot, 1);
5113 pci_enable_wake(pdev, PCI_D3cold, 1);
5117 pci_enable_wake(pdev, PCI_D3hot, 0);
5118 pci_enable_wake(pdev, PCI_D3cold, 0);
5121 e1000_release_manageability(adapter);
5123 /* make sure adapter isn't asleep if manageability is enabled */
5124 if (adapter->en_mng_pt) {
5125 pci_enable_wake(pdev, PCI_D3hot, 1);
5126 pci_enable_wake(pdev, PCI_D3cold, 1);
5129 if (hw->phy_type == e1000_phy_igp_3)
5130 e1000_phy_powerdown_workaround(hw);
5132 if (netif_running(netdev))
5133 e1000_free_irq(adapter);
5135 /* Release control of h/w to f/w. If f/w is AMT enabled, this
5136 * would have already happened in close and is redundant. */
5137 e1000_release_hw_control(adapter);
5139 pci_disable_device(pdev);
5141 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5147 static int e1000_resume(struct pci_dev *pdev)
5149 struct net_device *netdev = pci_get_drvdata(pdev);
5150 struct e1000_adapter *adapter = netdev_priv(netdev);
5151 struct e1000_hw *hw = &adapter->hw;
5154 pci_set_power_state(pdev, PCI_D0);
5155 pci_restore_state(pdev);
5156 if ((err = pci_enable_device(pdev))) {
5157 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5160 pci_set_master(pdev);
5162 pci_enable_wake(pdev, PCI_D3hot, 0);
5163 pci_enable_wake(pdev, PCI_D3cold, 0);
5165 if (netif_running(netdev) && (err = e1000_request_irq(adapter)))
5168 e1000_power_up_phy(adapter);
5169 e1000_reset(adapter);
5172 e1000_init_manageability(adapter);
5174 if (netif_running(netdev))
5177 netif_device_attach(netdev);
5179 /* If the controller is 82573 and f/w is AMT, do not set
5180 * DRV_LOAD until the interface is up. For all other cases,
5181 * let the f/w know that the h/w is now under the control
5183 if (hw->mac_type != e1000_82573 ||
5184 !e1000_check_mng_mode(hw))
5185 e1000_get_hw_control(adapter);
5191 static void e1000_shutdown(struct pci_dev *pdev)
5193 e1000_suspend(pdev, PMSG_SUSPEND);
5196 #ifdef CONFIG_NET_POLL_CONTROLLER
5198 * Polling 'interrupt' - used by things like netconsole to send skbs
5199 * without having to re-enable interrupts. It's not called while
5200 * the interrupt routine is executing.
5202 static void e1000_netpoll(struct net_device *netdev)
5204 struct e1000_adapter *adapter = netdev_priv(netdev);
5206 disable_irq(adapter->pdev->irq);
5207 e1000_intr(adapter->pdev->irq, netdev);
5208 #ifndef CONFIG_E1000_NAPI
5209 adapter->clean_rx(adapter, adapter->rx_ring);
5211 enable_irq(adapter->pdev->irq);
5216 * e1000_io_error_detected - called when PCI error is detected
5217 * @pdev: Pointer to PCI device
5218 * @state: The current pci conneection state
5220 * This function is called after a PCI bus error affecting
5221 * this device has been detected.
5223 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5224 pci_channel_state_t state)
5226 struct net_device *netdev = pci_get_drvdata(pdev);
5227 struct e1000_adapter *adapter = netdev->priv;
5229 netif_device_detach(netdev);
5231 if (netif_running(netdev))
5232 e1000_down(adapter);
5233 pci_disable_device(pdev);
5235 /* Request a slot slot reset. */
5236 return PCI_ERS_RESULT_NEED_RESET;
5240 * e1000_io_slot_reset - called after the pci bus has been reset.
5241 * @pdev: Pointer to PCI device
5243 * Restart the card from scratch, as if from a cold-boot. Implementation
5244 * resembles the first-half of the e1000_resume routine.
5246 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5248 struct net_device *netdev = pci_get_drvdata(pdev);
5249 struct e1000_adapter *adapter = netdev->priv;
5250 struct e1000_hw *hw = &adapter->hw;
5252 if (pci_enable_device(pdev)) {
5253 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5254 return PCI_ERS_RESULT_DISCONNECT;
5256 pci_set_master(pdev);
5258 pci_enable_wake(pdev, PCI_D3hot, 0);
5259 pci_enable_wake(pdev, PCI_D3cold, 0);
5261 e1000_reset(adapter);
5264 return PCI_ERS_RESULT_RECOVERED;
5268 * e1000_io_resume - called when traffic can start flowing again.
5269 * @pdev: Pointer to PCI device
5271 * This callback is called when the error recovery driver tells us that
5272 * its OK to resume normal operation. Implementation resembles the
5273 * second-half of the e1000_resume routine.
5275 static void e1000_io_resume(struct pci_dev *pdev)
5277 struct net_device *netdev = pci_get_drvdata(pdev);
5278 struct e1000_adapter *adapter = netdev->priv;
5279 struct e1000_hw *hw = &adapter->hw;
5281 e1000_init_manageability(adapter);
5283 if (netif_running(netdev)) {
5284 if (e1000_up(adapter)) {
5285 printk("e1000: can't bring device back up after reset\n");
5290 netif_device_attach(netdev);
5292 /* If the controller is 82573 and f/w is AMT, do not set
5293 * DRV_LOAD until the interface is up. For all other cases,
5294 * let the f/w know that the h/w is now under the control
5296 if (hw->mac_type != e1000_82573 ||
5297 !e1000_check_mng_mode(hw))
5298 e1000_get_hw_control(adapter);