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.\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 err = pci_enable_device(pdev);
905 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
906 !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
909 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
911 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
913 E1000_ERR("No usable DMA configuration, "
921 err = pci_request_regions(pdev, e1000_driver_name);
925 pci_set_master(pdev);
928 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
930 goto err_alloc_etherdev;
932 SET_NETDEV_DEV(netdev, &pdev->dev);
934 pci_set_drvdata(pdev, netdev);
935 adapter = netdev_priv(netdev);
936 adapter->netdev = netdev;
937 adapter->pdev = pdev;
938 adapter->msg_enable = (1 << debug) - 1;
944 hw->hw_addr = ioremap(pci_resource_start(pdev, BAR_0),
945 pci_resource_len(pdev, BAR_0));
949 for (i = BAR_1; i <= BAR_5; i++) {
950 if (pci_resource_len(pdev, i) == 0)
952 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
953 hw->io_base = pci_resource_start(pdev, i);
958 netdev->open = &e1000_open;
959 netdev->stop = &e1000_close;
960 netdev->hard_start_xmit = &e1000_xmit_frame;
961 netdev->get_stats = &e1000_get_stats;
962 netdev->set_rx_mode = &e1000_set_rx_mode;
963 netdev->set_mac_address = &e1000_set_mac;
964 netdev->change_mtu = &e1000_change_mtu;
965 netdev->do_ioctl = &e1000_ioctl;
966 e1000_set_ethtool_ops(netdev);
967 netdev->tx_timeout = &e1000_tx_timeout;
968 netdev->watchdog_timeo = 5 * HZ;
969 #ifdef CONFIG_E1000_NAPI
970 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
972 netdev->vlan_rx_register = e1000_vlan_rx_register;
973 netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
974 netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
975 #ifdef CONFIG_NET_POLL_CONTROLLER
976 netdev->poll_controller = e1000_netpoll;
978 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
980 adapter->bd_number = cards_found;
982 /* setup the private structure */
984 err = e1000_sw_init(adapter);
989 /* Flash BAR mapping must happen after e1000_sw_init
990 * because it depends on mac_type */
991 if ((hw->mac_type == e1000_ich8lan) &&
992 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
994 ioremap(pci_resource_start(pdev, 1),
995 pci_resource_len(pdev, 1));
996 if (!hw->flash_address)
1000 if (e1000_check_phy_reset_block(hw))
1001 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
1003 if (hw->mac_type >= e1000_82543) {
1004 netdev->features = NETIF_F_SG |
1006 NETIF_F_HW_VLAN_TX |
1007 NETIF_F_HW_VLAN_RX |
1008 NETIF_F_HW_VLAN_FILTER;
1009 if (hw->mac_type == e1000_ich8lan)
1010 netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1013 if ((hw->mac_type >= e1000_82544) &&
1014 (hw->mac_type != e1000_82547))
1015 netdev->features |= NETIF_F_TSO;
1017 if (hw->mac_type > e1000_82547_rev_2)
1018 netdev->features |= NETIF_F_TSO6;
1020 netdev->features |= NETIF_F_HIGHDMA;
1022 netdev->features |= NETIF_F_LLTX;
1024 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1026 /* initialize eeprom parameters */
1027 if (e1000_init_eeprom_params(hw)) {
1028 E1000_ERR("EEPROM initialization failed\n");
1032 /* before reading the EEPROM, reset the controller to
1033 * put the device in a known good starting state */
1037 /* make sure the EEPROM is good */
1038 if (e1000_validate_eeprom_checksum(hw) < 0) {
1039 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1040 e1000_dump_eeprom(adapter);
1042 * set MAC address to all zeroes to invalidate and temporary
1043 * disable this device for the user. This blocks regular
1044 * traffic while still permitting ethtool ioctls from reaching
1045 * the hardware as well as allowing the user to run the
1046 * interface after manually setting a hw addr using
1049 memset(hw->mac_addr, 0, netdev->addr_len);
1051 /* copy the MAC address out of the EEPROM */
1052 if (e1000_read_mac_addr(hw))
1053 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1055 /* don't block initalization here due to bad MAC address */
1056 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1057 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1059 if (!is_valid_ether_addr(netdev->perm_addr))
1060 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1062 e1000_get_bus_info(hw);
1064 init_timer(&adapter->tx_fifo_stall_timer);
1065 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1066 adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
1068 init_timer(&adapter->watchdog_timer);
1069 adapter->watchdog_timer.function = &e1000_watchdog;
1070 adapter->watchdog_timer.data = (unsigned long) adapter;
1072 init_timer(&adapter->phy_info_timer);
1073 adapter->phy_info_timer.function = &e1000_update_phy_info;
1074 adapter->phy_info_timer.data = (unsigned long)adapter;
1076 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1078 e1000_check_options(adapter);
1080 /* Initial Wake on LAN setting
1081 * If APM wake is enabled in the EEPROM,
1082 * enable the ACPI Magic Packet filter
1085 switch (hw->mac_type) {
1086 case e1000_82542_rev2_0:
1087 case e1000_82542_rev2_1:
1091 e1000_read_eeprom(hw,
1092 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1093 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1096 e1000_read_eeprom(hw,
1097 EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1098 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1101 case e1000_82546_rev_3:
1103 case e1000_80003es2lan:
1104 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1105 e1000_read_eeprom(hw,
1106 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1111 e1000_read_eeprom(hw,
1112 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1115 if (eeprom_data & eeprom_apme_mask)
1116 adapter->eeprom_wol |= E1000_WUFC_MAG;
1118 /* now that we have the eeprom settings, apply the special cases
1119 * where the eeprom may be wrong or the board simply won't support
1120 * wake on lan on a particular port */
1121 switch (pdev->device) {
1122 case E1000_DEV_ID_82546GB_PCIE:
1123 adapter->eeprom_wol = 0;
1125 case E1000_DEV_ID_82546EB_FIBER:
1126 case E1000_DEV_ID_82546GB_FIBER:
1127 case E1000_DEV_ID_82571EB_FIBER:
1128 /* Wake events only supported on port A for dual fiber
1129 * regardless of eeprom setting */
1130 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1131 adapter->eeprom_wol = 0;
1133 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1134 case E1000_DEV_ID_82571EB_QUAD_COPPER:
1135 case E1000_DEV_ID_82571EB_QUAD_FIBER:
1136 case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1137 case E1000_DEV_ID_82571PT_QUAD_COPPER:
1138 /* if quad port adapter, disable WoL on all but port A */
1139 if (global_quad_port_a != 0)
1140 adapter->eeprom_wol = 0;
1142 adapter->quad_port_a = 1;
1143 /* Reset for multiple quad port adapters */
1144 if (++global_quad_port_a == 4)
1145 global_quad_port_a = 0;
1149 /* initialize the wol settings based on the eeprom settings */
1150 adapter->wol = adapter->eeprom_wol;
1152 /* print bus type/speed/width info */
1153 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1154 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1155 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1156 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1157 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1158 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1159 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1160 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1161 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1162 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1163 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1166 printk("%s\n", print_mac(mac, netdev->dev_addr));
1168 if (hw->bus_type == e1000_bus_type_pci_express) {
1169 DPRINTK(PROBE, WARNING, "This device (id %04x:%04x) will no "
1170 "longer be supported by this driver in the future.\n",
1171 pdev->vendor, pdev->device);
1172 DPRINTK(PROBE, WARNING, "please use the \"e1000e\" "
1173 "driver instead.\n");
1176 /* reset the hardware with the new settings */
1177 e1000_reset(adapter);
1179 /* If the controller is 82573 and f/w is AMT, do not set
1180 * DRV_LOAD until the interface is up. For all other cases,
1181 * let the f/w know that the h/w is now under the control
1183 if (hw->mac_type != e1000_82573 ||
1184 !e1000_check_mng_mode(hw))
1185 e1000_get_hw_control(adapter);
1187 /* tell the stack to leave us alone until e1000_open() is called */
1188 netif_carrier_off(netdev);
1189 netif_stop_queue(netdev);
1191 strcpy(netdev->name, "eth%d");
1192 err = register_netdev(netdev);
1196 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1202 e1000_release_hw_control(adapter);
1204 if (!e1000_check_phy_reset_block(hw))
1205 e1000_phy_hw_reset(hw);
1207 if (hw->flash_address)
1208 iounmap(hw->flash_address);
1210 #ifdef CONFIG_E1000_NAPI
1211 for (i = 0; i < adapter->num_rx_queues; i++)
1212 dev_put(&adapter->polling_netdev[i]);
1215 kfree(adapter->tx_ring);
1216 kfree(adapter->rx_ring);
1217 #ifdef CONFIG_E1000_NAPI
1218 kfree(adapter->polling_netdev);
1221 iounmap(hw->hw_addr);
1223 free_netdev(netdev);
1225 pci_release_regions(pdev);
1228 pci_disable_device(pdev);
1233 * e1000_remove - Device Removal Routine
1234 * @pdev: PCI device information struct
1236 * e1000_remove is called by the PCI subsystem to alert the driver
1237 * that it should release a PCI device. The could be caused by a
1238 * Hot-Plug event, or because the driver is going to be removed from
1242 static void __devexit e1000_remove(struct pci_dev *pdev)
1244 struct net_device *netdev = pci_get_drvdata(pdev);
1245 struct e1000_adapter *adapter = netdev_priv(netdev);
1246 struct e1000_hw *hw = &adapter->hw;
1247 #ifdef CONFIG_E1000_NAPI
1251 cancel_work_sync(&adapter->reset_task);
1253 e1000_release_manageability(adapter);
1255 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1256 * would have already happened in close and is redundant. */
1257 e1000_release_hw_control(adapter);
1259 #ifdef CONFIG_E1000_NAPI
1260 for (i = 0; i < adapter->num_rx_queues; i++)
1261 dev_put(&adapter->polling_netdev[i]);
1264 unregister_netdev(netdev);
1266 if (!e1000_check_phy_reset_block(hw))
1267 e1000_phy_hw_reset(hw);
1269 kfree(adapter->tx_ring);
1270 kfree(adapter->rx_ring);
1271 #ifdef CONFIG_E1000_NAPI
1272 kfree(adapter->polling_netdev);
1275 iounmap(hw->hw_addr);
1276 if (hw->flash_address)
1277 iounmap(hw->flash_address);
1278 pci_release_regions(pdev);
1280 free_netdev(netdev);
1282 pci_disable_device(pdev);
1286 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1287 * @adapter: board private structure to initialize
1289 * e1000_sw_init initializes the Adapter private data structure.
1290 * Fields are initialized based on PCI device information and
1291 * OS network device settings (MTU size).
1294 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1296 struct e1000_hw *hw = &adapter->hw;
1297 struct net_device *netdev = adapter->netdev;
1298 struct pci_dev *pdev = adapter->pdev;
1299 #ifdef CONFIG_E1000_NAPI
1303 /* PCI config space info */
1305 hw->vendor_id = pdev->vendor;
1306 hw->device_id = pdev->device;
1307 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1308 hw->subsystem_id = pdev->subsystem_device;
1309 hw->revision_id = pdev->revision;
1311 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1313 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1314 adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1315 hw->max_frame_size = netdev->mtu +
1316 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1317 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1319 /* identify the MAC */
1321 if (e1000_set_mac_type(hw)) {
1322 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1326 switch (hw->mac_type) {
1331 case e1000_82541_rev_2:
1332 case e1000_82547_rev_2:
1333 hw->phy_init_script = 1;
1337 e1000_set_media_type(hw);
1339 hw->wait_autoneg_complete = false;
1340 hw->tbi_compatibility_en = true;
1341 hw->adaptive_ifs = true;
1343 /* Copper options */
1345 if (hw->media_type == e1000_media_type_copper) {
1346 hw->mdix = AUTO_ALL_MODES;
1347 hw->disable_polarity_correction = false;
1348 hw->master_slave = E1000_MASTER_SLAVE;
1351 adapter->num_tx_queues = 1;
1352 adapter->num_rx_queues = 1;
1354 if (e1000_alloc_queues(adapter)) {
1355 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1359 #ifdef CONFIG_E1000_NAPI
1360 for (i = 0; i < adapter->num_rx_queues; i++) {
1361 adapter->polling_netdev[i].priv = adapter;
1362 dev_hold(&adapter->polling_netdev[i]);
1363 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1365 spin_lock_init(&adapter->tx_queue_lock);
1368 /* Explicitly disable IRQ since the NIC can be in any state. */
1369 e1000_irq_disable(adapter);
1371 spin_lock_init(&adapter->stats_lock);
1373 set_bit(__E1000_DOWN, &adapter->flags);
1379 * e1000_alloc_queues - Allocate memory for all rings
1380 * @adapter: board private structure to initialize
1382 * We allocate one ring per queue at run-time since we don't know the
1383 * number of queues at compile-time. The polling_netdev array is
1384 * intended for Multiqueue, but should work fine with a single queue.
1387 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1389 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1390 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1391 if (!adapter->tx_ring)
1394 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1395 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1396 if (!adapter->rx_ring) {
1397 kfree(adapter->tx_ring);
1401 #ifdef CONFIG_E1000_NAPI
1402 adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1403 sizeof(struct net_device),
1405 if (!adapter->polling_netdev) {
1406 kfree(adapter->tx_ring);
1407 kfree(adapter->rx_ring);
1412 return E1000_SUCCESS;
1416 * e1000_open - Called when a network interface is made active
1417 * @netdev: network interface device structure
1419 * Returns 0 on success, negative value on failure
1421 * The open entry point is called when a network interface is made
1422 * active by the system (IFF_UP). At this point all resources needed
1423 * for transmit and receive operations are allocated, the interrupt
1424 * handler is registered with the OS, the watchdog timer is started,
1425 * and the stack is notified that the interface is ready.
1428 static int e1000_open(struct net_device *netdev)
1430 struct e1000_adapter *adapter = netdev_priv(netdev);
1431 struct e1000_hw *hw = &adapter->hw;
1434 /* disallow open during test */
1435 if (test_bit(__E1000_TESTING, &adapter->flags))
1438 /* allocate transmit descriptors */
1439 err = e1000_setup_all_tx_resources(adapter);
1443 /* allocate receive descriptors */
1444 err = e1000_setup_all_rx_resources(adapter);
1448 e1000_power_up_phy(adapter);
1450 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1451 if ((hw->mng_cookie.status &
1452 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1453 e1000_update_mng_vlan(adapter);
1456 /* If AMT is enabled, let the firmware know that the network
1457 * interface is now open */
1458 if (hw->mac_type == e1000_82573 &&
1459 e1000_check_mng_mode(hw))
1460 e1000_get_hw_control(adapter);
1462 /* before we allocate an interrupt, we must be ready to handle it.
1463 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1464 * as soon as we call pci_request_irq, so we have to setup our
1465 * clean_rx handler before we do so. */
1466 e1000_configure(adapter);
1468 err = e1000_request_irq(adapter);
1472 /* From here on the code is the same as e1000_up() */
1473 clear_bit(__E1000_DOWN, &adapter->flags);
1475 #ifdef CONFIG_E1000_NAPI
1476 napi_enable(&adapter->napi);
1479 e1000_irq_enable(adapter);
1481 netif_start_queue(netdev);
1483 /* fire a link status change interrupt to start the watchdog */
1484 ew32(ICS, E1000_ICS_LSC);
1486 return E1000_SUCCESS;
1489 e1000_release_hw_control(adapter);
1490 e1000_power_down_phy(adapter);
1491 e1000_free_all_rx_resources(adapter);
1493 e1000_free_all_tx_resources(adapter);
1495 e1000_reset(adapter);
1501 * e1000_close - Disables a network interface
1502 * @netdev: network interface device structure
1504 * Returns 0, this is not allowed to fail
1506 * The close entry point is called when an interface is de-activated
1507 * by the OS. The hardware is still under the drivers control, but
1508 * needs to be disabled. A global MAC reset is issued to stop the
1509 * hardware, and all transmit and receive resources are freed.
1512 static int e1000_close(struct net_device *netdev)
1514 struct e1000_adapter *adapter = netdev_priv(netdev);
1515 struct e1000_hw *hw = &adapter->hw;
1517 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1518 e1000_down(adapter);
1519 e1000_power_down_phy(adapter);
1520 e1000_free_irq(adapter);
1522 e1000_free_all_tx_resources(adapter);
1523 e1000_free_all_rx_resources(adapter);
1525 /* kill manageability vlan ID if supported, but not if a vlan with
1526 * the same ID is registered on the host OS (let 8021q kill it) */
1527 if ((hw->mng_cookie.status &
1528 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1530 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1531 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1534 /* If AMT is enabled, let the firmware know that the network
1535 * interface is now closed */
1536 if (hw->mac_type == e1000_82573 &&
1537 e1000_check_mng_mode(hw))
1538 e1000_release_hw_control(adapter);
1544 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1545 * @adapter: address of board private structure
1546 * @start: address of beginning of memory
1547 * @len: length of memory
1549 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1552 struct e1000_hw *hw = &adapter->hw;
1553 unsigned long begin = (unsigned long)start;
1554 unsigned long end = begin + len;
1556 /* First rev 82545 and 82546 need to not allow any memory
1557 * write location to cross 64k boundary due to errata 23 */
1558 if (hw->mac_type == e1000_82545 ||
1559 hw->mac_type == e1000_82546) {
1560 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1567 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1568 * @adapter: board private structure
1569 * @txdr: tx descriptor ring (for a specific queue) to setup
1571 * Return 0 on success, negative on failure
1574 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1575 struct e1000_tx_ring *txdr)
1577 struct pci_dev *pdev = adapter->pdev;
1580 size = sizeof(struct e1000_buffer) * txdr->count;
1581 txdr->buffer_info = vmalloc(size);
1582 if (!txdr->buffer_info) {
1584 "Unable to allocate memory for the transmit descriptor ring\n");
1587 memset(txdr->buffer_info, 0, size);
1589 /* round up to nearest 4K */
1591 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1592 txdr->size = ALIGN(txdr->size, 4096);
1594 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1597 vfree(txdr->buffer_info);
1599 "Unable to allocate memory for the transmit descriptor ring\n");
1603 /* Fix for errata 23, can't cross 64kB boundary */
1604 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1605 void *olddesc = txdr->desc;
1606 dma_addr_t olddma = txdr->dma;
1607 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1608 "at %p\n", txdr->size, txdr->desc);
1609 /* Try again, without freeing the previous */
1610 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1611 /* Failed allocation, critical failure */
1613 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1614 goto setup_tx_desc_die;
1617 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1619 pci_free_consistent(pdev, txdr->size, txdr->desc,
1621 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1623 "Unable to allocate aligned memory "
1624 "for the transmit descriptor ring\n");
1625 vfree(txdr->buffer_info);
1628 /* Free old allocation, new allocation was successful */
1629 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1632 memset(txdr->desc, 0, txdr->size);
1634 txdr->next_to_use = 0;
1635 txdr->next_to_clean = 0;
1636 spin_lock_init(&txdr->tx_lock);
1642 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1643 * (Descriptors) for all queues
1644 * @adapter: board private structure
1646 * Return 0 on success, negative on failure
1649 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1653 for (i = 0; i < adapter->num_tx_queues; i++) {
1654 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1657 "Allocation for Tx Queue %u failed\n", i);
1658 for (i-- ; i >= 0; i--)
1659 e1000_free_tx_resources(adapter,
1660 &adapter->tx_ring[i]);
1669 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1670 * @adapter: board private structure
1672 * Configure the Tx unit of the MAC after a reset.
1675 static void e1000_configure_tx(struct e1000_adapter *adapter)
1678 struct e1000_hw *hw = &adapter->hw;
1679 u32 tdlen, tctl, tipg, tarc;
1682 /* Setup the HW Tx Head and Tail descriptor pointers */
1684 switch (adapter->num_tx_queues) {
1687 tdba = adapter->tx_ring[0].dma;
1688 tdlen = adapter->tx_ring[0].count *
1689 sizeof(struct e1000_tx_desc);
1691 ew32(TDBAH, (tdba >> 32));
1692 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1695 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1696 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1700 /* Set the default values for the Tx Inter Packet Gap timer */
1701 if (hw->mac_type <= e1000_82547_rev_2 &&
1702 (hw->media_type == e1000_media_type_fiber ||
1703 hw->media_type == e1000_media_type_internal_serdes))
1704 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1706 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1708 switch (hw->mac_type) {
1709 case e1000_82542_rev2_0:
1710 case e1000_82542_rev2_1:
1711 tipg = DEFAULT_82542_TIPG_IPGT;
1712 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1713 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1715 case e1000_80003es2lan:
1716 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1717 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1720 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1721 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1724 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1725 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1728 /* Set the Tx Interrupt Delay register */
1730 ew32(TIDV, adapter->tx_int_delay);
1731 if (hw->mac_type >= e1000_82540)
1732 ew32(TADV, adapter->tx_abs_int_delay);
1734 /* Program the Transmit Control Register */
1737 tctl &= ~E1000_TCTL_CT;
1738 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1739 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1741 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1743 /* set the speed mode bit, we'll clear it if we're not at
1744 * gigabit link later */
1747 } else if (hw->mac_type == e1000_80003es2lan) {
1756 e1000_config_collision_dist(hw);
1758 /* Setup Transmit Descriptor Settings for eop descriptor */
1759 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1761 /* only set IDE if we are delaying interrupts using the timers */
1762 if (adapter->tx_int_delay)
1763 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1765 if (hw->mac_type < e1000_82543)
1766 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1768 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1770 /* Cache if we're 82544 running in PCI-X because we'll
1771 * need this to apply a workaround later in the send path. */
1772 if (hw->mac_type == e1000_82544 &&
1773 hw->bus_type == e1000_bus_type_pcix)
1774 adapter->pcix_82544 = 1;
1781 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1782 * @adapter: board private structure
1783 * @rxdr: rx descriptor ring (for a specific queue) to setup
1785 * Returns 0 on success, negative on failure
1788 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1789 struct e1000_rx_ring *rxdr)
1791 struct e1000_hw *hw = &adapter->hw;
1792 struct pci_dev *pdev = adapter->pdev;
1795 size = sizeof(struct e1000_buffer) * rxdr->count;
1796 rxdr->buffer_info = vmalloc(size);
1797 if (!rxdr->buffer_info) {
1799 "Unable to allocate memory for the receive descriptor ring\n");
1802 memset(rxdr->buffer_info, 0, size);
1804 rxdr->ps_page = kcalloc(rxdr->count, sizeof(struct e1000_ps_page),
1806 if (!rxdr->ps_page) {
1807 vfree(rxdr->buffer_info);
1809 "Unable to allocate memory for the receive descriptor ring\n");
1813 rxdr->ps_page_dma = kcalloc(rxdr->count,
1814 sizeof(struct e1000_ps_page_dma),
1816 if (!rxdr->ps_page_dma) {
1817 vfree(rxdr->buffer_info);
1818 kfree(rxdr->ps_page);
1820 "Unable to allocate memory for the receive descriptor ring\n");
1824 if (hw->mac_type <= e1000_82547_rev_2)
1825 desc_len = sizeof(struct e1000_rx_desc);
1827 desc_len = sizeof(union e1000_rx_desc_packet_split);
1829 /* Round up to nearest 4K */
1831 rxdr->size = rxdr->count * desc_len;
1832 rxdr->size = ALIGN(rxdr->size, 4096);
1834 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1838 "Unable to allocate memory for the receive descriptor ring\n");
1840 vfree(rxdr->buffer_info);
1841 kfree(rxdr->ps_page);
1842 kfree(rxdr->ps_page_dma);
1846 /* Fix for errata 23, can't cross 64kB boundary */
1847 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1848 void *olddesc = rxdr->desc;
1849 dma_addr_t olddma = rxdr->dma;
1850 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1851 "at %p\n", rxdr->size, rxdr->desc);
1852 /* Try again, without freeing the previous */
1853 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1854 /* Failed allocation, critical failure */
1856 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1858 "Unable to allocate memory "
1859 "for the receive descriptor ring\n");
1860 goto setup_rx_desc_die;
1863 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1865 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1867 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1869 "Unable to allocate aligned memory "
1870 "for the receive descriptor ring\n");
1871 goto setup_rx_desc_die;
1873 /* Free old allocation, new allocation was successful */
1874 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1877 memset(rxdr->desc, 0, rxdr->size);
1879 rxdr->next_to_clean = 0;
1880 rxdr->next_to_use = 0;
1886 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1887 * (Descriptors) for all queues
1888 * @adapter: board private structure
1890 * Return 0 on success, negative on failure
1893 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1897 for (i = 0; i < adapter->num_rx_queues; i++) {
1898 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1901 "Allocation for Rx Queue %u failed\n", i);
1902 for (i-- ; i >= 0; i--)
1903 e1000_free_rx_resources(adapter,
1904 &adapter->rx_ring[i]);
1913 * e1000_setup_rctl - configure the receive control registers
1914 * @adapter: Board private structure
1916 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1917 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1918 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1920 struct e1000_hw *hw = &adapter->hw;
1923 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1929 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1931 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1932 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1933 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1935 if (hw->tbi_compatibility_on == 1)
1936 rctl |= E1000_RCTL_SBP;
1938 rctl &= ~E1000_RCTL_SBP;
1940 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1941 rctl &= ~E1000_RCTL_LPE;
1943 rctl |= E1000_RCTL_LPE;
1945 /* Setup buffer sizes */
1946 rctl &= ~E1000_RCTL_SZ_4096;
1947 rctl |= E1000_RCTL_BSEX;
1948 switch (adapter->rx_buffer_len) {
1949 case E1000_RXBUFFER_256:
1950 rctl |= E1000_RCTL_SZ_256;
1951 rctl &= ~E1000_RCTL_BSEX;
1953 case E1000_RXBUFFER_512:
1954 rctl |= E1000_RCTL_SZ_512;
1955 rctl &= ~E1000_RCTL_BSEX;
1957 case E1000_RXBUFFER_1024:
1958 rctl |= E1000_RCTL_SZ_1024;
1959 rctl &= ~E1000_RCTL_BSEX;
1961 case E1000_RXBUFFER_2048:
1963 rctl |= E1000_RCTL_SZ_2048;
1964 rctl &= ~E1000_RCTL_BSEX;
1966 case E1000_RXBUFFER_4096:
1967 rctl |= E1000_RCTL_SZ_4096;
1969 case E1000_RXBUFFER_8192:
1970 rctl |= E1000_RCTL_SZ_8192;
1972 case E1000_RXBUFFER_16384:
1973 rctl |= E1000_RCTL_SZ_16384;
1977 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1978 /* 82571 and greater support packet-split where the protocol
1979 * header is placed in skb->data and the packet data is
1980 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1981 * In the case of a non-split, skb->data is linearly filled,
1982 * followed by the page buffers. Therefore, skb->data is
1983 * sized to hold the largest protocol header.
1985 /* allocations using alloc_page take too long for regular MTU
1986 * so only enable packet split for jumbo frames */
1987 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1988 if ((hw->mac_type >= e1000_82571) && (pages <= 3) &&
1989 PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
1990 adapter->rx_ps_pages = pages;
1992 adapter->rx_ps_pages = 0;
1994 if (adapter->rx_ps_pages) {
1995 /* Configure extra packet-split registers */
1996 rfctl = er32(RFCTL);
1997 rfctl |= E1000_RFCTL_EXTEN;
1998 /* disable packet split support for IPv6 extension headers,
1999 * because some malformed IPv6 headers can hang the RX */
2000 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2001 E1000_RFCTL_NEW_IPV6_EXT_DIS);
2005 rctl |= E1000_RCTL_DTYP_PS;
2007 psrctl |= adapter->rx_ps_bsize0 >>
2008 E1000_PSRCTL_BSIZE0_SHIFT;
2010 switch (adapter->rx_ps_pages) {
2012 psrctl |= PAGE_SIZE <<
2013 E1000_PSRCTL_BSIZE3_SHIFT;
2015 psrctl |= PAGE_SIZE <<
2016 E1000_PSRCTL_BSIZE2_SHIFT;
2018 psrctl |= PAGE_SIZE >>
2019 E1000_PSRCTL_BSIZE1_SHIFT;
2023 ew32(PSRCTL, psrctl);
2030 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
2031 * @adapter: board private structure
2033 * Configure the Rx unit of the MAC after a reset.
2036 static void e1000_configure_rx(struct e1000_adapter *adapter)
2039 struct e1000_hw *hw = &adapter->hw;
2040 u32 rdlen, rctl, rxcsum, ctrl_ext;
2042 if (adapter->rx_ps_pages) {
2043 /* this is a 32 byte descriptor */
2044 rdlen = adapter->rx_ring[0].count *
2045 sizeof(union e1000_rx_desc_packet_split);
2046 adapter->clean_rx = e1000_clean_rx_irq_ps;
2047 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2049 rdlen = adapter->rx_ring[0].count *
2050 sizeof(struct e1000_rx_desc);
2051 adapter->clean_rx = e1000_clean_rx_irq;
2052 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2055 /* disable receives while setting up the descriptors */
2057 ew32(RCTL, rctl & ~E1000_RCTL_EN);
2059 /* set the Receive Delay Timer Register */
2060 ew32(RDTR, adapter->rx_int_delay);
2062 if (hw->mac_type >= e1000_82540) {
2063 ew32(RADV, adapter->rx_abs_int_delay);
2064 if (adapter->itr_setting != 0)
2065 ew32(ITR, 1000000000 / (adapter->itr * 256));
2068 if (hw->mac_type >= e1000_82571) {
2069 ctrl_ext = er32(CTRL_EXT);
2070 /* Reset delay timers after every interrupt */
2071 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2072 #ifdef CONFIG_E1000_NAPI
2073 /* Auto-Mask interrupts upon ICR access */
2074 ctrl_ext |= E1000_CTRL_EXT_IAME;
2075 ew32(IAM, 0xffffffff);
2077 ew32(CTRL_EXT, ctrl_ext);
2078 E1000_WRITE_FLUSH();
2081 /* Setup the HW Rx Head and Tail Descriptor Pointers and
2082 * the Base and Length of the Rx Descriptor Ring */
2083 switch (adapter->num_rx_queues) {
2086 rdba = adapter->rx_ring[0].dma;
2088 ew32(RDBAH, (rdba >> 32));
2089 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
2092 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2093 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2097 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2098 if (hw->mac_type >= e1000_82543) {
2099 rxcsum = er32(RXCSUM);
2100 if (adapter->rx_csum) {
2101 rxcsum |= E1000_RXCSUM_TUOFL;
2103 /* Enable 82571 IPv4 payload checksum for UDP fragments
2104 * Must be used in conjunction with packet-split. */
2105 if ((hw->mac_type >= e1000_82571) &&
2106 (adapter->rx_ps_pages)) {
2107 rxcsum |= E1000_RXCSUM_IPPCSE;
2110 rxcsum &= ~E1000_RXCSUM_TUOFL;
2111 /* don't need to clear IPPCSE as it defaults to 0 */
2113 ew32(RXCSUM, rxcsum);
2116 /* enable early receives on 82573, only takes effect if using > 2048
2117 * byte total frame size. for example only for jumbo frames */
2118 #define E1000_ERT_2048 0x100
2119 if (hw->mac_type == e1000_82573)
2120 ew32(ERT, E1000_ERT_2048);
2122 /* Enable Receives */
2127 * e1000_free_tx_resources - Free Tx Resources per Queue
2128 * @adapter: board private structure
2129 * @tx_ring: Tx descriptor ring for a specific queue
2131 * Free all transmit software resources
2134 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
2135 struct e1000_tx_ring *tx_ring)
2137 struct pci_dev *pdev = adapter->pdev;
2139 e1000_clean_tx_ring(adapter, tx_ring);
2141 vfree(tx_ring->buffer_info);
2142 tx_ring->buffer_info = NULL;
2144 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2146 tx_ring->desc = NULL;
2150 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2151 * @adapter: board private structure
2153 * Free all transmit software resources
2156 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2160 for (i = 0; i < adapter->num_tx_queues; i++)
2161 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2164 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2165 struct e1000_buffer *buffer_info)
2167 if (buffer_info->dma) {
2168 pci_unmap_page(adapter->pdev,
2170 buffer_info->length,
2172 buffer_info->dma = 0;
2174 if (buffer_info->skb) {
2175 dev_kfree_skb_any(buffer_info->skb);
2176 buffer_info->skb = NULL;
2178 /* buffer_info must be completely set up in the transmit path */
2182 * e1000_clean_tx_ring - Free Tx Buffers
2183 * @adapter: board private structure
2184 * @tx_ring: ring to be cleaned
2187 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
2188 struct e1000_tx_ring *tx_ring)
2190 struct e1000_hw *hw = &adapter->hw;
2191 struct e1000_buffer *buffer_info;
2195 /* Free all the Tx ring sk_buffs */
2197 for (i = 0; i < tx_ring->count; i++) {
2198 buffer_info = &tx_ring->buffer_info[i];
2199 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2202 size = sizeof(struct e1000_buffer) * tx_ring->count;
2203 memset(tx_ring->buffer_info, 0, size);
2205 /* Zero out the descriptor ring */
2207 memset(tx_ring->desc, 0, tx_ring->size);
2209 tx_ring->next_to_use = 0;
2210 tx_ring->next_to_clean = 0;
2211 tx_ring->last_tx_tso = 0;
2213 writel(0, hw->hw_addr + tx_ring->tdh);
2214 writel(0, hw->hw_addr + tx_ring->tdt);
2218 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2219 * @adapter: board private structure
2222 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2226 for (i = 0; i < adapter->num_tx_queues; i++)
2227 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2231 * e1000_free_rx_resources - Free Rx Resources
2232 * @adapter: board private structure
2233 * @rx_ring: ring to clean the resources from
2235 * Free all receive software resources
2238 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2239 struct e1000_rx_ring *rx_ring)
2241 struct pci_dev *pdev = adapter->pdev;
2243 e1000_clean_rx_ring(adapter, rx_ring);
2245 vfree(rx_ring->buffer_info);
2246 rx_ring->buffer_info = NULL;
2247 kfree(rx_ring->ps_page);
2248 rx_ring->ps_page = NULL;
2249 kfree(rx_ring->ps_page_dma);
2250 rx_ring->ps_page_dma = NULL;
2252 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2254 rx_ring->desc = NULL;
2258 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2259 * @adapter: board private structure
2261 * Free all receive software resources
2264 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2268 for (i = 0; i < adapter->num_rx_queues; i++)
2269 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2273 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2274 * @adapter: board private structure
2275 * @rx_ring: ring to free buffers from
2278 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2279 struct e1000_rx_ring *rx_ring)
2281 struct e1000_hw *hw = &adapter->hw;
2282 struct e1000_buffer *buffer_info;
2283 struct e1000_ps_page *ps_page;
2284 struct e1000_ps_page_dma *ps_page_dma;
2285 struct pci_dev *pdev = adapter->pdev;
2289 /* Free all the Rx ring sk_buffs */
2290 for (i = 0; i < rx_ring->count; i++) {
2291 buffer_info = &rx_ring->buffer_info[i];
2292 if (buffer_info->skb) {
2293 pci_unmap_single(pdev,
2295 buffer_info->length,
2296 PCI_DMA_FROMDEVICE);
2298 dev_kfree_skb(buffer_info->skb);
2299 buffer_info->skb = NULL;
2301 ps_page = &rx_ring->ps_page[i];
2302 ps_page_dma = &rx_ring->ps_page_dma[i];
2303 for (j = 0; j < adapter->rx_ps_pages; j++) {
2304 if (!ps_page->ps_page[j]) break;
2305 pci_unmap_page(pdev,
2306 ps_page_dma->ps_page_dma[j],
2307 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2308 ps_page_dma->ps_page_dma[j] = 0;
2309 put_page(ps_page->ps_page[j]);
2310 ps_page->ps_page[j] = NULL;
2314 size = sizeof(struct e1000_buffer) * rx_ring->count;
2315 memset(rx_ring->buffer_info, 0, size);
2316 size = sizeof(struct e1000_ps_page) * rx_ring->count;
2317 memset(rx_ring->ps_page, 0, size);
2318 size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2319 memset(rx_ring->ps_page_dma, 0, size);
2321 /* Zero out the descriptor ring */
2323 memset(rx_ring->desc, 0, rx_ring->size);
2325 rx_ring->next_to_clean = 0;
2326 rx_ring->next_to_use = 0;
2328 writel(0, hw->hw_addr + rx_ring->rdh);
2329 writel(0, hw->hw_addr + rx_ring->rdt);
2333 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2334 * @adapter: board private structure
2337 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2341 for (i = 0; i < adapter->num_rx_queues; i++)
2342 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2345 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2346 * and memory write and invalidate disabled for certain operations
2348 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2350 struct e1000_hw *hw = &adapter->hw;
2351 struct net_device *netdev = adapter->netdev;
2354 e1000_pci_clear_mwi(hw);
2357 rctl |= E1000_RCTL_RST;
2359 E1000_WRITE_FLUSH();
2362 if (netif_running(netdev))
2363 e1000_clean_all_rx_rings(adapter);
2366 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2368 struct e1000_hw *hw = &adapter->hw;
2369 struct net_device *netdev = adapter->netdev;
2373 rctl &= ~E1000_RCTL_RST;
2375 E1000_WRITE_FLUSH();
2378 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2379 e1000_pci_set_mwi(hw);
2381 if (netif_running(netdev)) {
2382 /* No need to loop, because 82542 supports only 1 queue */
2383 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2384 e1000_configure_rx(adapter);
2385 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2390 * e1000_set_mac - Change the Ethernet Address of the NIC
2391 * @netdev: network interface device structure
2392 * @p: pointer to an address structure
2394 * Returns 0 on success, negative on failure
2397 static int e1000_set_mac(struct net_device *netdev, void *p)
2399 struct e1000_adapter *adapter = netdev_priv(netdev);
2400 struct e1000_hw *hw = &adapter->hw;
2401 struct sockaddr *addr = p;
2403 if (!is_valid_ether_addr(addr->sa_data))
2404 return -EADDRNOTAVAIL;
2406 /* 82542 2.0 needs to be in reset to write receive address registers */
2408 if (hw->mac_type == e1000_82542_rev2_0)
2409 e1000_enter_82542_rst(adapter);
2411 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2412 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2414 e1000_rar_set(hw, hw->mac_addr, 0);
2416 /* With 82571 controllers, LAA may be overwritten (with the default)
2417 * due to controller reset from the other port. */
2418 if (hw->mac_type == e1000_82571) {
2419 /* activate the work around */
2420 hw->laa_is_present = 1;
2422 /* Hold a copy of the LAA in RAR[14] This is done so that
2423 * between the time RAR[0] gets clobbered and the time it
2424 * gets fixed (in e1000_watchdog), the actual LAA is in one
2425 * of the RARs and no incoming packets directed to this port
2426 * are dropped. Eventaully the LAA will be in RAR[0] and
2428 e1000_rar_set(hw, hw->mac_addr,
2429 E1000_RAR_ENTRIES - 1);
2432 if (hw->mac_type == e1000_82542_rev2_0)
2433 e1000_leave_82542_rst(adapter);
2439 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2440 * @netdev: network interface device structure
2442 * The set_rx_mode entry point is called whenever the unicast or multicast
2443 * address lists or the network interface flags are updated. This routine is
2444 * responsible for configuring the hardware for proper unicast, multicast,
2445 * promiscuous mode, and all-multi behavior.
2448 static void e1000_set_rx_mode(struct net_device *netdev)
2450 struct e1000_adapter *adapter = netdev_priv(netdev);
2451 struct e1000_hw *hw = &adapter->hw;
2452 struct dev_addr_list *uc_ptr;
2453 struct dev_addr_list *mc_ptr;
2456 int i, rar_entries = E1000_RAR_ENTRIES;
2457 int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2458 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2459 E1000_NUM_MTA_REGISTERS;
2461 if (hw->mac_type == e1000_ich8lan)
2462 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2464 /* reserve RAR[14] for LAA over-write work-around */
2465 if (hw->mac_type == e1000_82571)
2468 /* Check for Promiscuous and All Multicast modes */
2472 if (netdev->flags & IFF_PROMISC) {
2473 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2474 rctl &= ~E1000_RCTL_VFE;
2476 if (netdev->flags & IFF_ALLMULTI) {
2477 rctl |= E1000_RCTL_MPE;
2479 rctl &= ~E1000_RCTL_MPE;
2481 if (adapter->hw.mac_type != e1000_ich8lan)
2482 rctl |= E1000_RCTL_VFE;
2486 if (netdev->uc_count > rar_entries - 1) {
2487 rctl |= E1000_RCTL_UPE;
2488 } else if (!(netdev->flags & IFF_PROMISC)) {
2489 rctl &= ~E1000_RCTL_UPE;
2490 uc_ptr = netdev->uc_list;
2495 /* 82542 2.0 needs to be in reset to write receive address registers */
2497 if (hw->mac_type == e1000_82542_rev2_0)
2498 e1000_enter_82542_rst(adapter);
2500 /* load the first 14 addresses into the exact filters 1-14. Unicast
2501 * addresses take precedence to avoid disabling unicast filtering
2504 * RAR 0 is used for the station MAC adddress
2505 * if there are not 14 addresses, go ahead and clear the filters
2506 * -- with 82571 controllers only 0-13 entries are filled here
2508 mc_ptr = netdev->mc_list;
2510 for (i = 1; i < rar_entries; i++) {
2512 e1000_rar_set(hw, uc_ptr->da_addr, i);
2513 uc_ptr = uc_ptr->next;
2514 } else if (mc_ptr) {
2515 e1000_rar_set(hw, mc_ptr->da_addr, i);
2516 mc_ptr = mc_ptr->next;
2518 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2519 E1000_WRITE_FLUSH();
2520 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2521 E1000_WRITE_FLUSH();
2524 WARN_ON(uc_ptr != NULL);
2526 /* clear the old settings from the multicast hash table */
2528 for (i = 0; i < mta_reg_count; i++) {
2529 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2530 E1000_WRITE_FLUSH();
2533 /* load any remaining addresses into the hash table */
2535 for (; mc_ptr; mc_ptr = mc_ptr->next) {
2536 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2537 e1000_mta_set(hw, hash_value);
2540 if (hw->mac_type == e1000_82542_rev2_0)
2541 e1000_leave_82542_rst(adapter);
2544 /* Need to wait a few seconds after link up to get diagnostic information from
2547 static void e1000_update_phy_info(unsigned long data)
2549 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2550 struct e1000_hw *hw = &adapter->hw;
2551 e1000_phy_get_info(hw, &adapter->phy_info);
2555 * e1000_82547_tx_fifo_stall - Timer Call-back
2556 * @data: pointer to adapter cast into an unsigned long
2559 static void e1000_82547_tx_fifo_stall(unsigned long data)
2561 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2562 struct e1000_hw *hw = &adapter->hw;
2563 struct net_device *netdev = adapter->netdev;
2566 if (atomic_read(&adapter->tx_fifo_stall)) {
2567 if ((er32(TDT) == er32(TDH)) &&
2568 (er32(TDFT) == er32(TDFH)) &&
2569 (er32(TDFTS) == er32(TDFHS))) {
2571 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2572 ew32(TDFT, adapter->tx_head_addr);
2573 ew32(TDFH, adapter->tx_head_addr);
2574 ew32(TDFTS, adapter->tx_head_addr);
2575 ew32(TDFHS, adapter->tx_head_addr);
2577 E1000_WRITE_FLUSH();
2579 adapter->tx_fifo_head = 0;
2580 atomic_set(&adapter->tx_fifo_stall, 0);
2581 netif_wake_queue(netdev);
2583 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2589 * e1000_watchdog - Timer Call-back
2590 * @data: pointer to adapter cast into an unsigned long
2592 static void e1000_watchdog(unsigned long data)
2594 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2595 struct e1000_hw *hw = &adapter->hw;
2596 struct net_device *netdev = adapter->netdev;
2597 struct e1000_tx_ring *txdr = adapter->tx_ring;
2601 ret_val = e1000_check_for_link(hw);
2602 if ((ret_val == E1000_ERR_PHY) &&
2603 (hw->phy_type == e1000_phy_igp_3) &&
2604 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2605 /* See e1000_kumeran_lock_loss_workaround() */
2607 "Gigabit has been disabled, downgrading speed\n");
2610 if (hw->mac_type == e1000_82573) {
2611 e1000_enable_tx_pkt_filtering(hw);
2612 if (adapter->mng_vlan_id != hw->mng_cookie.vlan_id)
2613 e1000_update_mng_vlan(adapter);
2616 if ((hw->media_type == e1000_media_type_internal_serdes) &&
2617 !(er32(TXCW) & E1000_TXCW_ANE))
2618 link = !hw->serdes_link_down;
2620 link = er32(STATUS) & E1000_STATUS_LU;
2623 if (!netif_carrier_ok(netdev)) {
2626 e1000_get_speed_and_duplex(hw,
2627 &adapter->link_speed,
2628 &adapter->link_duplex);
2631 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2632 "Flow Control: %s\n",
2633 adapter->link_speed,
2634 adapter->link_duplex == FULL_DUPLEX ?
2635 "Full Duplex" : "Half Duplex",
2636 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2637 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2638 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2639 E1000_CTRL_TFCE) ? "TX" : "None" )));
2641 /* tweak tx_queue_len according to speed/duplex
2642 * and adjust the timeout factor */
2643 netdev->tx_queue_len = adapter->tx_queue_len;
2644 adapter->tx_timeout_factor = 1;
2645 switch (adapter->link_speed) {
2648 netdev->tx_queue_len = 10;
2649 adapter->tx_timeout_factor = 8;
2653 netdev->tx_queue_len = 100;
2654 /* maybe add some timeout factor ? */
2658 if ((hw->mac_type == e1000_82571 ||
2659 hw->mac_type == e1000_82572) &&
2662 tarc0 = er32(TARC0);
2663 tarc0 &= ~(1 << 21);
2667 /* disable TSO for pcie and 10/100 speeds, to avoid
2668 * some hardware issues */
2669 if (!adapter->tso_force &&
2670 hw->bus_type == e1000_bus_type_pci_express){
2671 switch (adapter->link_speed) {
2675 "10/100 speed: disabling TSO\n");
2676 netdev->features &= ~NETIF_F_TSO;
2677 netdev->features &= ~NETIF_F_TSO6;
2680 netdev->features |= NETIF_F_TSO;
2681 netdev->features |= NETIF_F_TSO6;
2689 /* enable transmits in the hardware, need to do this
2690 * after setting TARC0 */
2692 tctl |= E1000_TCTL_EN;
2695 netif_carrier_on(netdev);
2696 netif_wake_queue(netdev);
2697 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2698 adapter->smartspeed = 0;
2700 /* make sure the receive unit is started */
2701 if (hw->rx_needs_kicking) {
2702 u32 rctl = er32(RCTL);
2703 ew32(RCTL, rctl | E1000_RCTL_EN);
2707 if (netif_carrier_ok(netdev)) {
2708 adapter->link_speed = 0;
2709 adapter->link_duplex = 0;
2710 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2711 netif_carrier_off(netdev);
2712 netif_stop_queue(netdev);
2713 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2715 /* 80003ES2LAN workaround--
2716 * For packet buffer work-around on link down event;
2717 * disable receives in the ISR and
2718 * reset device here in the watchdog
2720 if (hw->mac_type == e1000_80003es2lan)
2722 schedule_work(&adapter->reset_task);
2725 e1000_smartspeed(adapter);
2728 e1000_update_stats(adapter);
2730 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2731 adapter->tpt_old = adapter->stats.tpt;
2732 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2733 adapter->colc_old = adapter->stats.colc;
2735 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2736 adapter->gorcl_old = adapter->stats.gorcl;
2737 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2738 adapter->gotcl_old = adapter->stats.gotcl;
2740 e1000_update_adaptive(hw);
2742 if (!netif_carrier_ok(netdev)) {
2743 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2744 /* We've lost link, so the controller stops DMA,
2745 * but we've got queued Tx work that's never going
2746 * to get done, so reset controller to flush Tx.
2747 * (Do the reset outside of interrupt context). */
2748 adapter->tx_timeout_count++;
2749 schedule_work(&adapter->reset_task);
2753 /* Cause software interrupt to ensure rx ring is cleaned */
2754 ew32(ICS, E1000_ICS_RXDMT0);
2756 /* Force detection of hung controller every watchdog period */
2757 adapter->detect_tx_hung = true;
2759 /* With 82571 controllers, LAA may be overwritten due to controller
2760 * reset from the other port. Set the appropriate LAA in RAR[0] */
2761 if (hw->mac_type == e1000_82571 && hw->laa_is_present)
2762 e1000_rar_set(hw, hw->mac_addr, 0);
2764 /* Reset the timer */
2765 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2768 enum latency_range {
2772 latency_invalid = 255
2776 * e1000_update_itr - update the dynamic ITR value based on statistics
2777 * Stores a new ITR value based on packets and byte
2778 * counts during the last interrupt. The advantage of per interrupt
2779 * computation is faster updates and more accurate ITR for the current
2780 * traffic pattern. Constants in this function were computed
2781 * based on theoretical maximum wire speed and thresholds were set based
2782 * on testing data as well as attempting to minimize response time
2783 * while increasing bulk throughput.
2784 * this functionality is controlled by the InterruptThrottleRate module
2785 * parameter (see e1000_param.c)
2786 * @adapter: pointer to adapter
2787 * @itr_setting: current adapter->itr
2788 * @packets: the number of packets during this measurement interval
2789 * @bytes: the number of bytes during this measurement interval
2791 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2792 u16 itr_setting, int packets, int bytes)
2794 unsigned int retval = itr_setting;
2795 struct e1000_hw *hw = &adapter->hw;
2797 if (unlikely(hw->mac_type < e1000_82540))
2798 goto update_itr_done;
2801 goto update_itr_done;
2803 switch (itr_setting) {
2804 case lowest_latency:
2805 /* jumbo frames get bulk treatment*/
2806 if (bytes/packets > 8000)
2807 retval = bulk_latency;
2808 else if ((packets < 5) && (bytes > 512))
2809 retval = low_latency;
2811 case low_latency: /* 50 usec aka 20000 ints/s */
2812 if (bytes > 10000) {
2813 /* jumbo frames need bulk latency setting */
2814 if (bytes/packets > 8000)
2815 retval = bulk_latency;
2816 else if ((packets < 10) || ((bytes/packets) > 1200))
2817 retval = bulk_latency;
2818 else if ((packets > 35))
2819 retval = lowest_latency;
2820 } else if (bytes/packets > 2000)
2821 retval = bulk_latency;
2822 else if (packets <= 2 && bytes < 512)
2823 retval = lowest_latency;
2825 case bulk_latency: /* 250 usec aka 4000 ints/s */
2826 if (bytes > 25000) {
2828 retval = low_latency;
2829 } else if (bytes < 6000) {
2830 retval = low_latency;
2839 static void e1000_set_itr(struct e1000_adapter *adapter)
2841 struct e1000_hw *hw = &adapter->hw;
2843 u32 new_itr = adapter->itr;
2845 if (unlikely(hw->mac_type < e1000_82540))
2848 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2849 if (unlikely(adapter->link_speed != SPEED_1000)) {
2855 adapter->tx_itr = e1000_update_itr(adapter,
2857 adapter->total_tx_packets,
2858 adapter->total_tx_bytes);
2859 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2860 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2861 adapter->tx_itr = low_latency;
2863 adapter->rx_itr = e1000_update_itr(adapter,
2865 adapter->total_rx_packets,
2866 adapter->total_rx_bytes);
2867 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2868 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2869 adapter->rx_itr = low_latency;
2871 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2873 switch (current_itr) {
2874 /* counts and packets in update_itr are dependent on these numbers */
2875 case lowest_latency:
2879 new_itr = 20000; /* aka hwitr = ~200 */
2889 if (new_itr != adapter->itr) {
2890 /* this attempts to bias the interrupt rate towards Bulk
2891 * by adding intermediate steps when interrupt rate is
2893 new_itr = new_itr > adapter->itr ?
2894 min(adapter->itr + (new_itr >> 2), new_itr) :
2896 adapter->itr = new_itr;
2897 ew32(ITR, 1000000000 / (new_itr * 256));
2903 #define E1000_TX_FLAGS_CSUM 0x00000001
2904 #define E1000_TX_FLAGS_VLAN 0x00000002
2905 #define E1000_TX_FLAGS_TSO 0x00000004
2906 #define E1000_TX_FLAGS_IPV4 0x00000008
2907 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2908 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2910 static int e1000_tso(struct e1000_adapter *adapter,
2911 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2913 struct e1000_context_desc *context_desc;
2914 struct e1000_buffer *buffer_info;
2917 u16 ipcse = 0, tucse, mss;
2918 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2921 if (skb_is_gso(skb)) {
2922 if (skb_header_cloned(skb)) {
2923 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2928 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2929 mss = skb_shinfo(skb)->gso_size;
2930 if (skb->protocol == htons(ETH_P_IP)) {
2931 struct iphdr *iph = ip_hdr(skb);
2934 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2938 cmd_length = E1000_TXD_CMD_IP;
2939 ipcse = skb_transport_offset(skb) - 1;
2940 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2941 ipv6_hdr(skb)->payload_len = 0;
2942 tcp_hdr(skb)->check =
2943 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2944 &ipv6_hdr(skb)->daddr,
2948 ipcss = skb_network_offset(skb);
2949 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2950 tucss = skb_transport_offset(skb);
2951 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2954 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2955 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2957 i = tx_ring->next_to_use;
2958 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2959 buffer_info = &tx_ring->buffer_info[i];
2961 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2962 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2963 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2964 context_desc->upper_setup.tcp_fields.tucss = tucss;
2965 context_desc->upper_setup.tcp_fields.tucso = tucso;
2966 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2967 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2968 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2969 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2971 buffer_info->time_stamp = jiffies;
2972 buffer_info->next_to_watch = i;
2974 if (++i == tx_ring->count) i = 0;
2975 tx_ring->next_to_use = i;
2982 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2983 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2985 struct e1000_context_desc *context_desc;
2986 struct e1000_buffer *buffer_info;
2990 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2991 css = skb_transport_offset(skb);
2993 i = tx_ring->next_to_use;
2994 buffer_info = &tx_ring->buffer_info[i];
2995 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2997 context_desc->lower_setup.ip_config = 0;
2998 context_desc->upper_setup.tcp_fields.tucss = css;
2999 context_desc->upper_setup.tcp_fields.tucso =
3000 css + skb->csum_offset;
3001 context_desc->upper_setup.tcp_fields.tucse = 0;
3002 context_desc->tcp_seg_setup.data = 0;
3003 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
3005 buffer_info->time_stamp = jiffies;
3006 buffer_info->next_to_watch = i;
3008 if (unlikely(++i == tx_ring->count)) i = 0;
3009 tx_ring->next_to_use = i;
3017 #define E1000_MAX_TXD_PWR 12
3018 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
3020 static int e1000_tx_map(struct e1000_adapter *adapter,
3021 struct e1000_tx_ring *tx_ring,
3022 struct sk_buff *skb, unsigned int first,
3023 unsigned int max_per_txd, unsigned int nr_frags,
3026 struct e1000_hw *hw = &adapter->hw;
3027 struct e1000_buffer *buffer_info;
3028 unsigned int len = skb->len;
3029 unsigned int offset = 0, size, count = 0, i;
3031 len -= skb->data_len;
3033 i = tx_ring->next_to_use;
3036 buffer_info = &tx_ring->buffer_info[i];
3037 size = min(len, max_per_txd);
3038 /* Workaround for Controller erratum --
3039 * descriptor for non-tso packet in a linear SKB that follows a
3040 * tso gets written back prematurely before the data is fully
3041 * DMA'd to the controller */
3042 if (!skb->data_len && tx_ring->last_tx_tso &&
3044 tx_ring->last_tx_tso = 0;
3048 /* Workaround for premature desc write-backs
3049 * in TSO mode. Append 4-byte sentinel desc */
3050 if (unlikely(mss && !nr_frags && size == len && size > 8))
3052 /* work-around for errata 10 and it applies
3053 * to all controllers in PCI-X mode
3054 * The fix is to make sure that the first descriptor of a
3055 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3057 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3058 (size > 2015) && count == 0))
3061 /* Workaround for potential 82544 hang in PCI-X. Avoid
3062 * terminating buffers within evenly-aligned dwords. */
3063 if (unlikely(adapter->pcix_82544 &&
3064 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3068 buffer_info->length = size;
3070 pci_map_single(adapter->pdev,
3074 buffer_info->time_stamp = jiffies;
3075 buffer_info->next_to_watch = i;
3080 if (unlikely(++i == tx_ring->count)) i = 0;
3083 for (f = 0; f < nr_frags; f++) {
3084 struct skb_frag_struct *frag;
3086 frag = &skb_shinfo(skb)->frags[f];
3088 offset = frag->page_offset;
3091 buffer_info = &tx_ring->buffer_info[i];
3092 size = min(len, max_per_txd);
3093 /* Workaround for premature desc write-backs
3094 * in TSO mode. Append 4-byte sentinel desc */
3095 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3097 /* Workaround for potential 82544 hang in PCI-X.
3098 * Avoid terminating buffers within evenly-aligned
3100 if (unlikely(adapter->pcix_82544 &&
3101 !((unsigned long)(frag->page+offset+size-1) & 4) &&
3105 buffer_info->length = size;
3107 pci_map_page(adapter->pdev,
3112 buffer_info->time_stamp = jiffies;
3113 buffer_info->next_to_watch = i;
3118 if (unlikely(++i == tx_ring->count)) i = 0;
3122 i = (i == 0) ? tx_ring->count - 1 : i - 1;
3123 tx_ring->buffer_info[i].skb = skb;
3124 tx_ring->buffer_info[first].next_to_watch = i;
3129 static void e1000_tx_queue(struct e1000_adapter *adapter,
3130 struct e1000_tx_ring *tx_ring, int tx_flags,
3133 struct e1000_hw *hw = &adapter->hw;
3134 struct e1000_tx_desc *tx_desc = NULL;
3135 struct e1000_buffer *buffer_info;
3136 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3139 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3140 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3142 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3144 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3145 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3148 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3149 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3150 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3153 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3154 txd_lower |= E1000_TXD_CMD_VLE;
3155 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3158 i = tx_ring->next_to_use;
3161 buffer_info = &tx_ring->buffer_info[i];
3162 tx_desc = E1000_TX_DESC(*tx_ring, i);
3163 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3164 tx_desc->lower.data =
3165 cpu_to_le32(txd_lower | buffer_info->length);
3166 tx_desc->upper.data = cpu_to_le32(txd_upper);
3167 if (unlikely(++i == tx_ring->count)) i = 0;
3170 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3172 /* Force memory writes to complete before letting h/w
3173 * know there are new descriptors to fetch. (Only
3174 * applicable for weak-ordered memory model archs,
3175 * such as IA-64). */
3178 tx_ring->next_to_use = i;
3179 writel(i, hw->hw_addr + tx_ring->tdt);
3180 /* we need this if more than one processor can write to our tail
3181 * at a time, it syncronizes IO on IA64/Altix systems */
3186 * 82547 workaround to avoid controller hang in half-duplex environment.
3187 * The workaround is to avoid queuing a large packet that would span
3188 * the internal Tx FIFO ring boundary by notifying the stack to resend
3189 * the packet at a later time. This gives the Tx FIFO an opportunity to
3190 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3191 * to the beginning of the Tx FIFO.
3194 #define E1000_FIFO_HDR 0x10
3195 #define E1000_82547_PAD_LEN 0x3E0
3197 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3198 struct sk_buff *skb)
3200 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3201 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3203 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3205 if (adapter->link_duplex != HALF_DUPLEX)
3206 goto no_fifo_stall_required;
3208 if (atomic_read(&adapter->tx_fifo_stall))
3211 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3212 atomic_set(&adapter->tx_fifo_stall, 1);
3216 no_fifo_stall_required:
3217 adapter->tx_fifo_head += skb_fifo_len;
3218 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3219 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3223 #define MINIMUM_DHCP_PACKET_SIZE 282
3224 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
3225 struct sk_buff *skb)
3227 struct e1000_hw *hw = &adapter->hw;
3229 if (vlan_tx_tag_present(skb)) {
3230 if (!((vlan_tx_tag_get(skb) == hw->mng_cookie.vlan_id) &&
3231 ( hw->mng_cookie.status &
3232 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3235 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3236 struct ethhdr *eth = (struct ethhdr *)skb->data;
3237 if ((htons(ETH_P_IP) == eth->h_proto)) {
3238 const struct iphdr *ip =
3239 (struct iphdr *)((u8 *)skb->data+14);
3240 if (IPPROTO_UDP == ip->protocol) {
3241 struct udphdr *udp =
3242 (struct udphdr *)((u8 *)ip +
3244 if (ntohs(udp->dest) == 67) {
3245 offset = (u8 *)udp + 8 - skb->data;
3246 length = skb->len - offset;
3248 return e1000_mng_write_dhcp_info(hw,
3258 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3260 struct e1000_adapter *adapter = netdev_priv(netdev);
3261 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3263 netif_stop_queue(netdev);
3264 /* Herbert's original patch had:
3265 * smp_mb__after_netif_stop_queue();
3266 * but since that doesn't exist yet, just open code it. */
3269 /* We need to check again in a case another CPU has just
3270 * made room available. */
3271 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3275 netif_start_queue(netdev);
3276 ++adapter->restart_queue;
3280 static int e1000_maybe_stop_tx(struct net_device *netdev,
3281 struct e1000_tx_ring *tx_ring, int size)
3283 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3285 return __e1000_maybe_stop_tx(netdev, size);
3288 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3289 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3291 struct e1000_adapter *adapter = netdev_priv(netdev);
3292 struct e1000_hw *hw = &adapter->hw;
3293 struct e1000_tx_ring *tx_ring;
3294 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3295 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3296 unsigned int tx_flags = 0;
3297 unsigned int len = skb->len - skb->data_len;
3298 unsigned long flags;
3299 unsigned int nr_frags;
3305 /* This goes back to the question of how to logically map a tx queue
3306 * to a flow. Right now, performance is impacted slightly negatively
3307 * if using multiple tx queues. If the stack breaks away from a
3308 * single qdisc implementation, we can look at this again. */
3309 tx_ring = adapter->tx_ring;
3311 if (unlikely(skb->len <= 0)) {
3312 dev_kfree_skb_any(skb);
3313 return NETDEV_TX_OK;
3316 /* 82571 and newer doesn't need the workaround that limited descriptor
3318 if (hw->mac_type >= e1000_82571)
3321 mss = skb_shinfo(skb)->gso_size;
3322 /* The controller does a simple calculation to
3323 * make sure there is enough room in the FIFO before
3324 * initiating the DMA for each buffer. The calc is:
3325 * 4 = ceil(buffer len/mss). To make sure we don't
3326 * overrun the FIFO, adjust the max buffer len if mss
3330 max_per_txd = min(mss << 2, max_per_txd);
3331 max_txd_pwr = fls(max_per_txd) - 1;
3333 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3334 * points to just header, pull a few bytes of payload from
3335 * frags into skb->data */
3336 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3337 if (skb->data_len && hdr_len == len) {
3338 switch (hw->mac_type) {
3339 unsigned int pull_size;
3341 /* Make sure we have room to chop off 4 bytes,
3342 * and that the end alignment will work out to
3343 * this hardware's requirements
3344 * NOTE: this is a TSO only workaround
3345 * if end byte alignment not correct move us
3346 * into the next dword */
3347 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3354 pull_size = min((unsigned int)4, skb->data_len);
3355 if (!__pskb_pull_tail(skb, pull_size)) {
3357 "__pskb_pull_tail failed.\n");
3358 dev_kfree_skb_any(skb);
3359 return NETDEV_TX_OK;
3361 len = skb->len - skb->data_len;
3370 /* reserve a descriptor for the offload context */
3371 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3375 /* Controller Erratum workaround */
3376 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3379 count += TXD_USE_COUNT(len, max_txd_pwr);
3381 if (adapter->pcix_82544)
3384 /* work-around for errata 10 and it applies to all controllers
3385 * in PCI-X mode, so add one more descriptor to the count
3387 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3391 nr_frags = skb_shinfo(skb)->nr_frags;
3392 for (f = 0; f < nr_frags; f++)
3393 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3395 if (adapter->pcix_82544)
3399 if (hw->tx_pkt_filtering &&
3400 (hw->mac_type == e1000_82573))
3401 e1000_transfer_dhcp_info(adapter, skb);
3403 if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
3404 /* Collision - tell upper layer to requeue */
3405 return NETDEV_TX_LOCKED;
3407 /* need: count + 2 desc gap to keep tail from touching
3408 * head, otherwise try next time */
3409 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3410 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3411 return NETDEV_TX_BUSY;
3414 if (unlikely(hw->mac_type == e1000_82547)) {
3415 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3416 netif_stop_queue(netdev);
3417 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3418 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3419 return NETDEV_TX_BUSY;
3423 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3424 tx_flags |= E1000_TX_FLAGS_VLAN;
3425 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3428 first = tx_ring->next_to_use;
3430 tso = e1000_tso(adapter, tx_ring, skb);
3432 dev_kfree_skb_any(skb);
3433 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3434 return NETDEV_TX_OK;
3438 tx_ring->last_tx_tso = 1;
3439 tx_flags |= E1000_TX_FLAGS_TSO;
3440 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3441 tx_flags |= E1000_TX_FLAGS_CSUM;
3443 /* Old method was to assume IPv4 packet by default if TSO was enabled.
3444 * 82571 hardware supports TSO capabilities for IPv6 as well...
3445 * no longer assume, we must. */
3446 if (likely(skb->protocol == htons(ETH_P_IP)))
3447 tx_flags |= E1000_TX_FLAGS_IPV4;
3449 e1000_tx_queue(adapter, tx_ring, tx_flags,
3450 e1000_tx_map(adapter, tx_ring, skb, first,
3451 max_per_txd, nr_frags, mss));
3453 netdev->trans_start = jiffies;
3455 /* Make sure there is space in the ring for the next send. */
3456 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3458 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3459 return NETDEV_TX_OK;
3463 * e1000_tx_timeout - Respond to a Tx Hang
3464 * @netdev: network interface device structure
3467 static void e1000_tx_timeout(struct net_device *netdev)
3469 struct e1000_adapter *adapter = netdev_priv(netdev);
3471 /* Do the reset outside of interrupt context */
3472 adapter->tx_timeout_count++;
3473 schedule_work(&adapter->reset_task);
3476 static void e1000_reset_task(struct work_struct *work)
3478 struct e1000_adapter *adapter =
3479 container_of(work, struct e1000_adapter, reset_task);
3481 e1000_reinit_locked(adapter);
3485 * e1000_get_stats - Get System Network Statistics
3486 * @netdev: network interface device structure
3488 * Returns the address of the device statistics structure.
3489 * The statistics are actually updated from the timer callback.
3492 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3494 struct e1000_adapter *adapter = netdev_priv(netdev);
3496 /* only return the current stats */
3497 return &adapter->net_stats;
3501 * e1000_change_mtu - Change the Maximum Transfer Unit
3502 * @netdev: network interface device structure
3503 * @new_mtu: new value for maximum frame size
3505 * Returns 0 on success, negative on failure
3508 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3510 struct e1000_adapter *adapter = netdev_priv(netdev);
3511 struct e1000_hw *hw = &adapter->hw;
3512 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3513 u16 eeprom_data = 0;
3515 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3516 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3517 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3521 /* Adapter-specific max frame size limits. */
3522 switch (hw->mac_type) {
3523 case e1000_undefined ... e1000_82542_rev2_1:
3525 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3526 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3531 /* Jumbo Frames not supported if:
3532 * - this is not an 82573L device
3533 * - ASPM is enabled in any way (0x1A bits 3:2) */
3534 e1000_read_eeprom(hw, EEPROM_INIT_3GIO_3, 1,
3536 if ((hw->device_id != E1000_DEV_ID_82573L) ||
3537 (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3538 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3540 "Jumbo Frames not supported.\n");
3545 /* ERT will be enabled later to enable wire speed receives */
3547 /* fall through to get support */
3550 case e1000_80003es2lan:
3551 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3552 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3553 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3558 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3562 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3563 * means we reserve 2 more, this pushes us to allocate from the next
3565 * i.e. RXBUFFER_2048 --> size-4096 slab */
3567 if (max_frame <= E1000_RXBUFFER_256)
3568 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3569 else if (max_frame <= E1000_RXBUFFER_512)
3570 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3571 else if (max_frame <= E1000_RXBUFFER_1024)
3572 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3573 else if (max_frame <= E1000_RXBUFFER_2048)
3574 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3575 else if (max_frame <= E1000_RXBUFFER_4096)
3576 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3577 else if (max_frame <= E1000_RXBUFFER_8192)
3578 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3579 else if (max_frame <= E1000_RXBUFFER_16384)
3580 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3582 /* adjust allocation if LPE protects us, and we aren't using SBP */
3583 if (!hw->tbi_compatibility_on &&
3584 ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3585 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3586 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3588 netdev->mtu = new_mtu;
3589 hw->max_frame_size = max_frame;
3591 if (netif_running(netdev))
3592 e1000_reinit_locked(adapter);
3598 * e1000_update_stats - Update the board statistics counters
3599 * @adapter: board private structure
3602 void e1000_update_stats(struct e1000_adapter *adapter)
3604 struct e1000_hw *hw = &adapter->hw;
3605 struct pci_dev *pdev = adapter->pdev;
3606 unsigned long flags;
3609 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3612 * Prevent stats update while adapter is being reset, or if the pci
3613 * connection is down.
3615 if (adapter->link_speed == 0)
3617 if (pci_channel_offline(pdev))
3620 spin_lock_irqsave(&adapter->stats_lock, flags);
3622 /* these counters are modified from e1000_tbi_adjust_stats,
3623 * called from the interrupt context, so they must only
3624 * be written while holding adapter->stats_lock
3627 adapter->stats.crcerrs += er32(CRCERRS);
3628 adapter->stats.gprc += er32(GPRC);
3629 adapter->stats.gorcl += er32(GORCL);
3630 adapter->stats.gorch += er32(GORCH);
3631 adapter->stats.bprc += er32(BPRC);
3632 adapter->stats.mprc += er32(MPRC);
3633 adapter->stats.roc += er32(ROC);
3635 if (hw->mac_type != e1000_ich8lan) {
3636 adapter->stats.prc64 += er32(PRC64);
3637 adapter->stats.prc127 += er32(PRC127);
3638 adapter->stats.prc255 += er32(PRC255);
3639 adapter->stats.prc511 += er32(PRC511);
3640 adapter->stats.prc1023 += er32(PRC1023);
3641 adapter->stats.prc1522 += er32(PRC1522);
3644 adapter->stats.symerrs += er32(SYMERRS);
3645 adapter->stats.mpc += er32(MPC);
3646 adapter->stats.scc += er32(SCC);
3647 adapter->stats.ecol += er32(ECOL);
3648 adapter->stats.mcc += er32(MCC);
3649 adapter->stats.latecol += er32(LATECOL);
3650 adapter->stats.dc += er32(DC);
3651 adapter->stats.sec += er32(SEC);
3652 adapter->stats.rlec += er32(RLEC);
3653 adapter->stats.xonrxc += er32(XONRXC);
3654 adapter->stats.xontxc += er32(XONTXC);
3655 adapter->stats.xoffrxc += er32(XOFFRXC);
3656 adapter->stats.xofftxc += er32(XOFFTXC);
3657 adapter->stats.fcruc += er32(FCRUC);
3658 adapter->stats.gptc += er32(GPTC);
3659 adapter->stats.gotcl += er32(GOTCL);
3660 adapter->stats.gotch += er32(GOTCH);
3661 adapter->stats.rnbc += er32(RNBC);
3662 adapter->stats.ruc += er32(RUC);
3663 adapter->stats.rfc += er32(RFC);
3664 adapter->stats.rjc += er32(RJC);
3665 adapter->stats.torl += er32(TORL);
3666 adapter->stats.torh += er32(TORH);
3667 adapter->stats.totl += er32(TOTL);
3668 adapter->stats.toth += er32(TOTH);
3669 adapter->stats.tpr += er32(TPR);
3671 if (hw->mac_type != e1000_ich8lan) {
3672 adapter->stats.ptc64 += er32(PTC64);
3673 adapter->stats.ptc127 += er32(PTC127);
3674 adapter->stats.ptc255 += er32(PTC255);
3675 adapter->stats.ptc511 += er32(PTC511);
3676 adapter->stats.ptc1023 += er32(PTC1023);
3677 adapter->stats.ptc1522 += er32(PTC1522);
3680 adapter->stats.mptc += er32(MPTC);
3681 adapter->stats.bptc += er32(BPTC);
3683 /* used for adaptive IFS */
3685 hw->tx_packet_delta = er32(TPT);
3686 adapter->stats.tpt += hw->tx_packet_delta;
3687 hw->collision_delta = er32(COLC);
3688 adapter->stats.colc += hw->collision_delta;
3690 if (hw->mac_type >= e1000_82543) {
3691 adapter->stats.algnerrc += er32(ALGNERRC);
3692 adapter->stats.rxerrc += er32(RXERRC);
3693 adapter->stats.tncrs += er32(TNCRS);
3694 adapter->stats.cexterr += er32(CEXTERR);
3695 adapter->stats.tsctc += er32(TSCTC);
3696 adapter->stats.tsctfc += er32(TSCTFC);
3698 if (hw->mac_type > e1000_82547_rev_2) {
3699 adapter->stats.iac += er32(IAC);
3700 adapter->stats.icrxoc += er32(ICRXOC);
3702 if (hw->mac_type != e1000_ich8lan) {
3703 adapter->stats.icrxptc += er32(ICRXPTC);
3704 adapter->stats.icrxatc += er32(ICRXATC);
3705 adapter->stats.ictxptc += er32(ICTXPTC);
3706 adapter->stats.ictxatc += er32(ICTXATC);
3707 adapter->stats.ictxqec += er32(ICTXQEC);
3708 adapter->stats.ictxqmtc += er32(ICTXQMTC);
3709 adapter->stats.icrxdmtc += er32(ICRXDMTC);
3713 /* Fill out the OS statistics structure */
3714 adapter->net_stats.multicast = adapter->stats.mprc;
3715 adapter->net_stats.collisions = adapter->stats.colc;
3719 /* RLEC on some newer hardware can be incorrect so build
3720 * our own version based on RUC and ROC */
3721 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3722 adapter->stats.crcerrs + adapter->stats.algnerrc +
3723 adapter->stats.ruc + adapter->stats.roc +
3724 adapter->stats.cexterr;
3725 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3726 adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3727 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3728 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3729 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3732 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3733 adapter->net_stats.tx_errors = adapter->stats.txerrc;
3734 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3735 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3736 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3737 if (hw->bad_tx_carr_stats_fd &&
3738 adapter->link_duplex == FULL_DUPLEX) {
3739 adapter->net_stats.tx_carrier_errors = 0;
3740 adapter->stats.tncrs = 0;
3743 /* Tx Dropped needs to be maintained elsewhere */
3746 if (hw->media_type == e1000_media_type_copper) {
3747 if ((adapter->link_speed == SPEED_1000) &&
3748 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3749 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3750 adapter->phy_stats.idle_errors += phy_tmp;
3753 if ((hw->mac_type <= e1000_82546) &&
3754 (hw->phy_type == e1000_phy_m88) &&
3755 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3756 adapter->phy_stats.receive_errors += phy_tmp;
3759 /* Management Stats */
3760 if (hw->has_smbus) {
3761 adapter->stats.mgptc += er32(MGTPTC);
3762 adapter->stats.mgprc += er32(MGTPRC);
3763 adapter->stats.mgpdc += er32(MGTPDC);
3766 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3770 * e1000_intr_msi - Interrupt Handler
3771 * @irq: interrupt number
3772 * @data: pointer to a network interface device structure
3775 static irqreturn_t e1000_intr_msi(int irq, void *data)
3777 struct net_device *netdev = data;
3778 struct e1000_adapter *adapter = netdev_priv(netdev);
3779 struct e1000_hw *hw = &adapter->hw;
3780 #ifndef CONFIG_E1000_NAPI
3783 u32 icr = er32(ICR);
3785 /* in NAPI mode read ICR disables interrupts using IAM */
3787 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3788 hw->get_link_status = 1;
3789 /* 80003ES2LAN workaround-- For packet buffer work-around on
3790 * link down event; disable receives here in the ISR and reset
3791 * adapter in watchdog */
3792 if (netif_carrier_ok(netdev) &&
3793 (hw->mac_type == e1000_80003es2lan)) {
3794 /* disable receives */
3795 u32 rctl = er32(RCTL);
3796 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3798 /* guard against interrupt when we're going down */
3799 if (!test_bit(__E1000_DOWN, &adapter->flags))
3800 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3803 #ifdef CONFIG_E1000_NAPI
3804 if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3805 adapter->total_tx_bytes = 0;
3806 adapter->total_tx_packets = 0;
3807 adapter->total_rx_bytes = 0;
3808 adapter->total_rx_packets = 0;
3809 __netif_rx_schedule(netdev, &adapter->napi);
3811 e1000_irq_enable(adapter);
3813 adapter->total_tx_bytes = 0;
3814 adapter->total_rx_bytes = 0;
3815 adapter->total_tx_packets = 0;
3816 adapter->total_rx_packets = 0;
3818 for (i = 0; i < E1000_MAX_INTR; i++)
3819 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3820 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3823 if (likely(adapter->itr_setting & 3))
3824 e1000_set_itr(adapter);
3831 * e1000_intr - Interrupt Handler
3832 * @irq: interrupt number
3833 * @data: pointer to a network interface device structure
3836 static irqreturn_t e1000_intr(int irq, void *data)
3838 struct net_device *netdev = data;
3839 struct e1000_adapter *adapter = netdev_priv(netdev);
3840 struct e1000_hw *hw = &adapter->hw;
3841 u32 rctl, icr = er32(ICR);
3842 #ifndef CONFIG_E1000_NAPI
3846 return IRQ_NONE; /* Not our interrupt */
3848 #ifdef CONFIG_E1000_NAPI
3849 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3850 * not set, then the adapter didn't send an interrupt */
3851 if (unlikely(hw->mac_type >= e1000_82571 &&
3852 !(icr & E1000_ICR_INT_ASSERTED)))
3855 /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No
3856 * need for the IMC write */
3859 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3860 hw->get_link_status = 1;
3861 /* 80003ES2LAN workaround--
3862 * For packet buffer work-around on link down event;
3863 * disable receives here in the ISR and
3864 * reset adapter in watchdog
3866 if (netif_carrier_ok(netdev) &&
3867 (hw->mac_type == e1000_80003es2lan)) {
3868 /* disable receives */
3870 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3872 /* guard against interrupt when we're going down */
3873 if (!test_bit(__E1000_DOWN, &adapter->flags))
3874 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3877 #ifdef CONFIG_E1000_NAPI
3878 if (unlikely(hw->mac_type < e1000_82571)) {
3879 /* disable interrupts, without the synchronize_irq bit */
3881 E1000_WRITE_FLUSH();
3883 if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3884 adapter->total_tx_bytes = 0;
3885 adapter->total_tx_packets = 0;
3886 adapter->total_rx_bytes = 0;
3887 adapter->total_rx_packets = 0;
3888 __netif_rx_schedule(netdev, &adapter->napi);
3890 /* this really should not happen! if it does it is basically a
3891 * bug, but not a hard error, so enable ints and continue */
3892 e1000_irq_enable(adapter);
3894 /* Writing IMC and IMS is needed for 82547.
3895 * Due to Hub Link bus being occupied, an interrupt
3896 * de-assertion message is not able to be sent.
3897 * When an interrupt assertion message is generated later,
3898 * two messages are re-ordered and sent out.
3899 * That causes APIC to think 82547 is in de-assertion
3900 * state, while 82547 is in assertion state, resulting
3901 * in dead lock. Writing IMC forces 82547 into
3902 * de-assertion state.
3904 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3907 adapter->total_tx_bytes = 0;
3908 adapter->total_rx_bytes = 0;
3909 adapter->total_tx_packets = 0;
3910 adapter->total_rx_packets = 0;
3912 for (i = 0; i < E1000_MAX_INTR; i++)
3913 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3914 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3917 if (likely(adapter->itr_setting & 3))
3918 e1000_set_itr(adapter);
3920 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3921 e1000_irq_enable(adapter);
3927 #ifdef CONFIG_E1000_NAPI
3929 * e1000_clean - NAPI Rx polling callback
3930 * @adapter: board private structure
3933 static int e1000_clean(struct napi_struct *napi, int budget)
3935 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3936 struct net_device *poll_dev = adapter->netdev;
3937 int tx_cleaned = 0, work_done = 0;
3939 /* Must NOT use netdev_priv macro here. */
3940 adapter = poll_dev->priv;
3942 /* e1000_clean is called per-cpu. This lock protects
3943 * tx_ring[0] from being cleaned by multiple cpus
3944 * simultaneously. A failure obtaining the lock means
3945 * tx_ring[0] is currently being cleaned anyway. */
3946 if (spin_trylock(&adapter->tx_queue_lock)) {
3947 tx_cleaned = e1000_clean_tx_irq(adapter,
3948 &adapter->tx_ring[0]);
3949 spin_unlock(&adapter->tx_queue_lock);
3952 adapter->clean_rx(adapter, &adapter->rx_ring[0],
3953 &work_done, budget);
3958 /* If budget not fully consumed, exit the polling mode */
3959 if (work_done < budget) {
3960 if (likely(adapter->itr_setting & 3))
3961 e1000_set_itr(adapter);
3962 netif_rx_complete(poll_dev, napi);
3963 e1000_irq_enable(adapter);
3971 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3972 * @adapter: board private structure
3975 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3976 struct e1000_tx_ring *tx_ring)
3978 struct e1000_hw *hw = &adapter->hw;
3979 struct net_device *netdev = adapter->netdev;
3980 struct e1000_tx_desc *tx_desc, *eop_desc;
3981 struct e1000_buffer *buffer_info;
3982 unsigned int i, eop;
3983 #ifdef CONFIG_E1000_NAPI
3984 unsigned int count = 0;
3986 bool cleaned = false;
3987 unsigned int total_tx_bytes=0, total_tx_packets=0;
3989 i = tx_ring->next_to_clean;
3990 eop = tx_ring->buffer_info[i].next_to_watch;
3991 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3993 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3994 for (cleaned = false; !cleaned; ) {
3995 tx_desc = E1000_TX_DESC(*tx_ring, i);
3996 buffer_info = &tx_ring->buffer_info[i];
3997 cleaned = (i == eop);
4000 struct sk_buff *skb = buffer_info->skb;
4001 unsigned int segs, bytecount;
4002 segs = skb_shinfo(skb)->gso_segs ?: 1;
4003 /* multiply data chunks by size of headers */
4004 bytecount = ((segs - 1) * skb_headlen(skb)) +
4006 total_tx_packets += segs;
4007 total_tx_bytes += bytecount;
4009 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
4010 tx_desc->upper.data = 0;
4012 if (unlikely(++i == tx_ring->count)) i = 0;
4015 eop = tx_ring->buffer_info[i].next_to_watch;
4016 eop_desc = E1000_TX_DESC(*tx_ring, eop);
4017 #ifdef CONFIG_E1000_NAPI
4018 #define E1000_TX_WEIGHT 64
4019 /* weight of a sort for tx, to avoid endless transmit cleanup */
4020 if (count++ == E1000_TX_WEIGHT) break;
4024 tx_ring->next_to_clean = i;
4026 #define TX_WAKE_THRESHOLD 32
4027 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
4028 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
4029 /* Make sure that anybody stopping the queue after this
4030 * sees the new next_to_clean.
4033 if (netif_queue_stopped(netdev)) {
4034 netif_wake_queue(netdev);
4035 ++adapter->restart_queue;
4039 if (adapter->detect_tx_hung) {
4040 /* Detect a transmit hang in hardware, this serializes the
4041 * check with the clearing of time_stamp and movement of i */
4042 adapter->detect_tx_hung = false;
4043 if (tx_ring->buffer_info[eop].dma &&
4044 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
4045 (adapter->tx_timeout_factor * HZ))
4046 && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
4048 /* detected Tx unit hang */
4049 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
4053 " next_to_use <%x>\n"
4054 " next_to_clean <%x>\n"
4055 "buffer_info[next_to_clean]\n"
4056 " time_stamp <%lx>\n"
4057 " next_to_watch <%x>\n"
4059 " next_to_watch.status <%x>\n",
4060 (unsigned long)((tx_ring - adapter->tx_ring) /
4061 sizeof(struct e1000_tx_ring)),
4062 readl(hw->hw_addr + tx_ring->tdh),
4063 readl(hw->hw_addr + tx_ring->tdt),
4064 tx_ring->next_to_use,
4065 tx_ring->next_to_clean,
4066 tx_ring->buffer_info[eop].time_stamp,
4069 eop_desc->upper.fields.status);
4070 netif_stop_queue(netdev);
4073 adapter->total_tx_bytes += total_tx_bytes;
4074 adapter->total_tx_packets += total_tx_packets;
4075 adapter->net_stats.tx_bytes += total_tx_bytes;
4076 adapter->net_stats.tx_packets += total_tx_packets;
4081 * e1000_rx_checksum - Receive Checksum Offload for 82543
4082 * @adapter: board private structure
4083 * @status_err: receive descriptor status and error fields
4084 * @csum: receive descriptor csum field
4085 * @sk_buff: socket buffer with received data
4088 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
4089 u32 csum, struct sk_buff *skb)
4091 struct e1000_hw *hw = &adapter->hw;
4092 u16 status = (u16)status_err;
4093 u8 errors = (u8)(status_err >> 24);
4094 skb->ip_summed = CHECKSUM_NONE;
4096 /* 82543 or newer only */
4097 if (unlikely(hw->mac_type < e1000_82543)) return;
4098 /* Ignore Checksum bit is set */
4099 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
4100 /* TCP/UDP checksum error bit is set */
4101 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4102 /* let the stack verify checksum errors */
4103 adapter->hw_csum_err++;
4106 /* TCP/UDP Checksum has not been calculated */
4107 if (hw->mac_type <= e1000_82547_rev_2) {
4108 if (!(status & E1000_RXD_STAT_TCPCS))
4111 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
4114 /* It must be a TCP or UDP packet with a valid checksum */
4115 if (likely(status & E1000_RXD_STAT_TCPCS)) {
4116 /* TCP checksum is good */
4117 skb->ip_summed = CHECKSUM_UNNECESSARY;
4118 } else if (hw->mac_type > e1000_82547_rev_2) {
4119 /* IP fragment with UDP payload */
4120 /* Hardware complements the payload checksum, so we undo it
4121 * and then put the value in host order for further stack use.
4123 __sum16 sum = (__force __sum16)htons(csum);
4124 skb->csum = csum_unfold(~sum);
4125 skb->ip_summed = CHECKSUM_COMPLETE;
4127 adapter->hw_csum_good++;
4131 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4132 * @adapter: board private structure
4134 #ifdef CONFIG_E1000_NAPI
4135 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4136 struct e1000_rx_ring *rx_ring,
4137 int *work_done, int work_to_do)
4139 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4140 struct e1000_rx_ring *rx_ring)
4143 struct e1000_hw *hw = &adapter->hw;
4144 struct net_device *netdev = adapter->netdev;
4145 struct pci_dev *pdev = adapter->pdev;
4146 struct e1000_rx_desc *rx_desc, *next_rxd;
4147 struct e1000_buffer *buffer_info, *next_buffer;
4148 unsigned long flags;
4152 int cleaned_count = 0;
4153 bool cleaned = false;
4154 unsigned int total_rx_bytes=0, total_rx_packets=0;
4156 i = rx_ring->next_to_clean;
4157 rx_desc = E1000_RX_DESC(*rx_ring, i);
4158 buffer_info = &rx_ring->buffer_info[i];
4160 while (rx_desc->status & E1000_RXD_STAT_DD) {
4161 struct sk_buff *skb;
4164 #ifdef CONFIG_E1000_NAPI
4165 if (*work_done >= work_to_do)
4169 status = rx_desc->status;
4170 skb = buffer_info->skb;
4171 buffer_info->skb = NULL;
4173 prefetch(skb->data - NET_IP_ALIGN);
4175 if (++i == rx_ring->count) i = 0;
4176 next_rxd = E1000_RX_DESC(*rx_ring, i);
4179 next_buffer = &rx_ring->buffer_info[i];
4183 pci_unmap_single(pdev,
4185 buffer_info->length,
4186 PCI_DMA_FROMDEVICE);
4188 length = le16_to_cpu(rx_desc->length);
4190 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4191 /* All receives must fit into a single buffer */
4192 E1000_DBG("%s: Receive packet consumed multiple"
4193 " buffers\n", netdev->name);
4195 buffer_info->skb = skb;
4199 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4200 last_byte = *(skb->data + length - 1);
4201 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4203 spin_lock_irqsave(&adapter->stats_lock, flags);
4204 e1000_tbi_adjust_stats(hw, &adapter->stats,
4206 spin_unlock_irqrestore(&adapter->stats_lock,
4211 buffer_info->skb = skb;
4216 /* adjust length to remove Ethernet CRC, this must be
4217 * done after the TBI_ACCEPT workaround above */
4220 /* probably a little skewed due to removing CRC */
4221 total_rx_bytes += length;
4224 /* code added for copybreak, this should improve
4225 * performance for small packets with large amounts
4226 * of reassembly being done in the stack */
4227 if (length < copybreak) {
4228 struct sk_buff *new_skb =
4229 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4231 skb_reserve(new_skb, NET_IP_ALIGN);
4232 skb_copy_to_linear_data_offset(new_skb,
4238 /* save the skb in buffer_info as good */
4239 buffer_info->skb = skb;
4242 /* else just continue with the old one */
4244 /* end copybreak code */
4245 skb_put(skb, length);
4247 /* Receive Checksum Offload */
4248 e1000_rx_checksum(adapter,
4250 ((u32)(rx_desc->errors) << 24),
4251 le16_to_cpu(rx_desc->csum), skb);
4253 skb->protocol = eth_type_trans(skb, netdev);
4254 #ifdef CONFIG_E1000_NAPI
4255 if (unlikely(adapter->vlgrp &&
4256 (status & E1000_RXD_STAT_VP))) {
4257 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4258 le16_to_cpu(rx_desc->special));
4260 netif_receive_skb(skb);
4262 #else /* CONFIG_E1000_NAPI */
4263 if (unlikely(adapter->vlgrp &&
4264 (status & E1000_RXD_STAT_VP))) {
4265 vlan_hwaccel_rx(skb, adapter->vlgrp,
4266 le16_to_cpu(rx_desc->special));
4270 #endif /* CONFIG_E1000_NAPI */
4271 netdev->last_rx = jiffies;
4274 rx_desc->status = 0;
4276 /* return some buffers to hardware, one at a time is too slow */
4277 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4278 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4282 /* use prefetched values */
4284 buffer_info = next_buffer;
4286 rx_ring->next_to_clean = i;
4288 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4290 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4292 adapter->total_rx_packets += total_rx_packets;
4293 adapter->total_rx_bytes += total_rx_bytes;
4294 adapter->net_stats.rx_bytes += total_rx_bytes;
4295 adapter->net_stats.rx_packets += total_rx_packets;
4300 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4301 * @adapter: board private structure
4304 #ifdef CONFIG_E1000_NAPI
4305 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4306 struct e1000_rx_ring *rx_ring,
4307 int *work_done, int work_to_do)
4309 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4310 struct e1000_rx_ring *rx_ring)
4313 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
4314 struct net_device *netdev = adapter->netdev;
4315 struct pci_dev *pdev = adapter->pdev;
4316 struct e1000_buffer *buffer_info, *next_buffer;
4317 struct e1000_ps_page *ps_page;
4318 struct e1000_ps_page_dma *ps_page_dma;
4319 struct sk_buff *skb;
4321 u32 length, staterr;
4322 int cleaned_count = 0;
4323 bool cleaned = false;
4324 unsigned int total_rx_bytes=0, total_rx_packets=0;
4326 i = rx_ring->next_to_clean;
4327 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4328 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4329 buffer_info = &rx_ring->buffer_info[i];
4331 while (staterr & E1000_RXD_STAT_DD) {
4332 ps_page = &rx_ring->ps_page[i];
4333 ps_page_dma = &rx_ring->ps_page_dma[i];
4334 #ifdef CONFIG_E1000_NAPI
4335 if (unlikely(*work_done >= work_to_do))
4339 skb = buffer_info->skb;
4341 /* in the packet split case this is header only */
4342 prefetch(skb->data - NET_IP_ALIGN);
4344 if (++i == rx_ring->count) i = 0;
4345 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
4348 next_buffer = &rx_ring->buffer_info[i];
4352 pci_unmap_single(pdev, buffer_info->dma,
4353 buffer_info->length,
4354 PCI_DMA_FROMDEVICE);
4356 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
4357 E1000_DBG("%s: Packet Split buffers didn't pick up"
4358 " the full packet\n", netdev->name);
4359 dev_kfree_skb_irq(skb);
4363 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
4364 dev_kfree_skb_irq(skb);
4368 length = le16_to_cpu(rx_desc->wb.middle.length0);
4370 if (unlikely(!length)) {
4371 E1000_DBG("%s: Last part of the packet spanning"
4372 " multiple descriptors\n", netdev->name);
4373 dev_kfree_skb_irq(skb);
4378 skb_put(skb, length);
4381 /* this looks ugly, but it seems compiler issues make it
4382 more efficient than reusing j */
4383 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4385 /* page alloc/put takes too long and effects small packet
4386 * throughput, so unsplit small packets and save the alloc/put*/
4387 if (l1 && (l1 <= copybreak) && ((length + l1) <= adapter->rx_ps_bsize0)) {
4389 /* there is no documentation about how to call
4390 * kmap_atomic, so we can't hold the mapping
4392 pci_dma_sync_single_for_cpu(pdev,
4393 ps_page_dma->ps_page_dma[0],
4395 PCI_DMA_FROMDEVICE);
4396 vaddr = kmap_atomic(ps_page->ps_page[0],
4397 KM_SKB_DATA_SOFTIRQ);
4398 memcpy(skb_tail_pointer(skb), vaddr, l1);
4399 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4400 pci_dma_sync_single_for_device(pdev,
4401 ps_page_dma->ps_page_dma[0],
4402 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4403 /* remove the CRC */
4410 for (j = 0; j < adapter->rx_ps_pages; j++) {
4411 length = le16_to_cpu(rx_desc->wb.upper.length[j]);
4414 pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4415 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4416 ps_page_dma->ps_page_dma[j] = 0;
4417 skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4419 ps_page->ps_page[j] = NULL;
4421 skb->data_len += length;
4422 skb->truesize += length;
4425 /* strip the ethernet crc, problem is we're using pages now so
4426 * this whole operation can get a little cpu intensive */
4427 pskb_trim(skb, skb->len - 4);
4430 total_rx_bytes += skb->len;
4433 e1000_rx_checksum(adapter, staterr,
4434 le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4435 skb->protocol = eth_type_trans(skb, netdev);
4437 if (likely(rx_desc->wb.upper.header_status &
4438 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4439 adapter->rx_hdr_split++;
4440 #ifdef CONFIG_E1000_NAPI
4441 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4442 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4443 le16_to_cpu(rx_desc->wb.middle.vlan));
4445 netif_receive_skb(skb);
4447 #else /* CONFIG_E1000_NAPI */
4448 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4449 vlan_hwaccel_rx(skb, adapter->vlgrp,
4450 le16_to_cpu(rx_desc->wb.middle.vlan));
4454 #endif /* CONFIG_E1000_NAPI */
4455 netdev->last_rx = jiffies;
4458 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4459 buffer_info->skb = NULL;
4461 /* return some buffers to hardware, one at a time is too slow */
4462 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4463 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4467 /* use prefetched values */
4469 buffer_info = next_buffer;
4471 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4473 rx_ring->next_to_clean = i;
4475 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4477 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4479 adapter->total_rx_packets += total_rx_packets;
4480 adapter->total_rx_bytes += total_rx_bytes;
4481 adapter->net_stats.rx_bytes += total_rx_bytes;
4482 adapter->net_stats.rx_packets += total_rx_packets;
4487 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4488 * @adapter: address of board private structure
4491 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4492 struct e1000_rx_ring *rx_ring,
4495 struct e1000_hw *hw = &adapter->hw;
4496 struct net_device *netdev = adapter->netdev;
4497 struct pci_dev *pdev = adapter->pdev;
4498 struct e1000_rx_desc *rx_desc;
4499 struct e1000_buffer *buffer_info;
4500 struct sk_buff *skb;
4502 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4504 i = rx_ring->next_to_use;
4505 buffer_info = &rx_ring->buffer_info[i];
4507 while (cleaned_count--) {
4508 skb = buffer_info->skb;
4514 skb = netdev_alloc_skb(netdev, bufsz);
4515 if (unlikely(!skb)) {
4516 /* Better luck next round */
4517 adapter->alloc_rx_buff_failed++;
4521 /* Fix for errata 23, can't cross 64kB boundary */
4522 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4523 struct sk_buff *oldskb = skb;
4524 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4525 "at %p\n", bufsz, skb->data);
4526 /* Try again, without freeing the previous */
4527 skb = netdev_alloc_skb(netdev, bufsz);
4528 /* Failed allocation, critical failure */
4530 dev_kfree_skb(oldskb);
4534 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4537 dev_kfree_skb(oldskb);
4538 break; /* while !buffer_info->skb */
4541 /* Use new allocation */
4542 dev_kfree_skb(oldskb);
4544 /* Make buffer alignment 2 beyond a 16 byte boundary
4545 * this will result in a 16 byte aligned IP header after
4546 * the 14 byte MAC header is removed
4548 skb_reserve(skb, NET_IP_ALIGN);
4550 buffer_info->skb = skb;
4551 buffer_info->length = adapter->rx_buffer_len;
4553 buffer_info->dma = pci_map_single(pdev,
4555 adapter->rx_buffer_len,
4556 PCI_DMA_FROMDEVICE);
4558 /* Fix for errata 23, can't cross 64kB boundary */
4559 if (!e1000_check_64k_bound(adapter,
4560 (void *)(unsigned long)buffer_info->dma,
4561 adapter->rx_buffer_len)) {
4562 DPRINTK(RX_ERR, ERR,
4563 "dma align check failed: %u bytes at %p\n",
4564 adapter->rx_buffer_len,
4565 (void *)(unsigned long)buffer_info->dma);
4567 buffer_info->skb = NULL;
4569 pci_unmap_single(pdev, buffer_info->dma,
4570 adapter->rx_buffer_len,
4571 PCI_DMA_FROMDEVICE);
4573 break; /* while !buffer_info->skb */
4575 rx_desc = E1000_RX_DESC(*rx_ring, i);
4576 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4578 if (unlikely(++i == rx_ring->count))
4580 buffer_info = &rx_ring->buffer_info[i];
4583 if (likely(rx_ring->next_to_use != i)) {
4584 rx_ring->next_to_use = i;
4585 if (unlikely(i-- == 0))
4586 i = (rx_ring->count - 1);
4588 /* Force memory writes to complete before letting h/w
4589 * know there are new descriptors to fetch. (Only
4590 * applicable for weak-ordered memory model archs,
4591 * such as IA-64). */
4593 writel(i, hw->hw_addr + rx_ring->rdt);
4598 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4599 * @adapter: address of board private structure
4602 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4603 struct e1000_rx_ring *rx_ring,
4606 struct e1000_hw *hw = &adapter->hw;
4607 struct net_device *netdev = adapter->netdev;
4608 struct pci_dev *pdev = adapter->pdev;
4609 union e1000_rx_desc_packet_split *rx_desc;
4610 struct e1000_buffer *buffer_info;
4611 struct e1000_ps_page *ps_page;
4612 struct e1000_ps_page_dma *ps_page_dma;
4613 struct sk_buff *skb;
4616 i = rx_ring->next_to_use;
4617 buffer_info = &rx_ring->buffer_info[i];
4618 ps_page = &rx_ring->ps_page[i];
4619 ps_page_dma = &rx_ring->ps_page_dma[i];
4621 while (cleaned_count--) {
4622 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4624 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4625 if (j < adapter->rx_ps_pages) {
4626 if (likely(!ps_page->ps_page[j])) {
4627 ps_page->ps_page[j] =
4628 alloc_page(GFP_ATOMIC);
4629 if (unlikely(!ps_page->ps_page[j])) {
4630 adapter->alloc_rx_buff_failed++;
4633 ps_page_dma->ps_page_dma[j] =
4635 ps_page->ps_page[j],
4637 PCI_DMA_FROMDEVICE);
4639 /* Refresh the desc even if buffer_addrs didn't
4640 * change because each write-back erases
4643 rx_desc->read.buffer_addr[j+1] =
4644 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4646 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
4649 skb = netdev_alloc_skb(netdev,
4650 adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4652 if (unlikely(!skb)) {
4653 adapter->alloc_rx_buff_failed++;
4657 /* Make buffer alignment 2 beyond a 16 byte boundary
4658 * this will result in a 16 byte aligned IP header after
4659 * the 14 byte MAC header is removed
4661 skb_reserve(skb, NET_IP_ALIGN);
4663 buffer_info->skb = skb;
4664 buffer_info->length = adapter->rx_ps_bsize0;
4665 buffer_info->dma = pci_map_single(pdev, skb->data,
4666 adapter->rx_ps_bsize0,
4667 PCI_DMA_FROMDEVICE);
4669 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4671 if (unlikely(++i == rx_ring->count)) i = 0;
4672 buffer_info = &rx_ring->buffer_info[i];
4673 ps_page = &rx_ring->ps_page[i];
4674 ps_page_dma = &rx_ring->ps_page_dma[i];
4678 if (likely(rx_ring->next_to_use != i)) {
4679 rx_ring->next_to_use = i;
4680 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4682 /* Force memory writes to complete before letting h/w
4683 * know there are new descriptors to fetch. (Only
4684 * applicable for weak-ordered memory model archs,
4685 * such as IA-64). */
4687 /* Hardware increments by 16 bytes, but packet split
4688 * descriptors are 32 bytes...so we increment tail
4691 writel(i<<1, hw->hw_addr + rx_ring->rdt);
4696 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4700 static void e1000_smartspeed(struct e1000_adapter *adapter)
4702 struct e1000_hw *hw = &adapter->hw;
4706 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4707 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4710 if (adapter->smartspeed == 0) {
4711 /* If Master/Slave config fault is asserted twice,
4712 * we assume back-to-back */
4713 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4714 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4715 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4716 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4717 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4718 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4719 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4720 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4722 adapter->smartspeed++;
4723 if (!e1000_phy_setup_autoneg(hw) &&
4724 !e1000_read_phy_reg(hw, PHY_CTRL,
4726 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4727 MII_CR_RESTART_AUTO_NEG);
4728 e1000_write_phy_reg(hw, PHY_CTRL,
4733 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4734 /* If still no link, perhaps using 2/3 pair cable */
4735 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4736 phy_ctrl |= CR_1000T_MS_ENABLE;
4737 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4738 if (!e1000_phy_setup_autoneg(hw) &&
4739 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4740 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4741 MII_CR_RESTART_AUTO_NEG);
4742 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4745 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4746 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4747 adapter->smartspeed = 0;
4757 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4763 return e1000_mii_ioctl(netdev, ifr, cmd);
4776 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4779 struct e1000_adapter *adapter = netdev_priv(netdev);
4780 struct e1000_hw *hw = &adapter->hw;
4781 struct mii_ioctl_data *data = if_mii(ifr);
4785 unsigned long flags;
4787 if (hw->media_type != e1000_media_type_copper)
4792 data->phy_id = hw->phy_addr;
4795 if (!capable(CAP_NET_ADMIN))
4797 spin_lock_irqsave(&adapter->stats_lock, flags);
4798 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4800 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4803 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4806 if (!capable(CAP_NET_ADMIN))
4808 if (data->reg_num & ~(0x1F))
4810 mii_reg = data->val_in;
4811 spin_lock_irqsave(&adapter->stats_lock, flags);
4812 if (e1000_write_phy_reg(hw, data->reg_num,
4814 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4817 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4818 if (hw->media_type == e1000_media_type_copper) {
4819 switch (data->reg_num) {
4821 if (mii_reg & MII_CR_POWER_DOWN)
4823 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4825 hw->autoneg_advertised = 0x2F;
4828 spddplx = SPEED_1000;
4829 else if (mii_reg & 0x2000)
4830 spddplx = SPEED_100;
4833 spddplx += (mii_reg & 0x100)
4836 retval = e1000_set_spd_dplx(adapter,
4841 if (netif_running(adapter->netdev))
4842 e1000_reinit_locked(adapter);
4844 e1000_reset(adapter);
4846 case M88E1000_PHY_SPEC_CTRL:
4847 case M88E1000_EXT_PHY_SPEC_CTRL:
4848 if (e1000_phy_reset(hw))
4853 switch (data->reg_num) {
4855 if (mii_reg & MII_CR_POWER_DOWN)
4857 if (netif_running(adapter->netdev))
4858 e1000_reinit_locked(adapter);
4860 e1000_reset(adapter);
4868 return E1000_SUCCESS;
4871 void e1000_pci_set_mwi(struct e1000_hw *hw)
4873 struct e1000_adapter *adapter = hw->back;
4874 int ret_val = pci_set_mwi(adapter->pdev);
4877 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4880 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4882 struct e1000_adapter *adapter = hw->back;
4884 pci_clear_mwi(adapter->pdev);
4887 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4889 struct e1000_adapter *adapter = hw->back;
4890 return pcix_get_mmrbc(adapter->pdev);
4893 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4895 struct e1000_adapter *adapter = hw->back;
4896 pcix_set_mmrbc(adapter->pdev, mmrbc);
4899 s32 e1000_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
4901 struct e1000_adapter *adapter = hw->back;
4904 cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4906 return -E1000_ERR_CONFIG;
4908 pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4910 return E1000_SUCCESS;
4913 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4918 static void e1000_vlan_rx_register(struct net_device *netdev,
4919 struct vlan_group *grp)
4921 struct e1000_adapter *adapter = netdev_priv(netdev);
4922 struct e1000_hw *hw = &adapter->hw;
4925 if (!test_bit(__E1000_DOWN, &adapter->flags))
4926 e1000_irq_disable(adapter);
4927 adapter->vlgrp = grp;
4930 /* enable VLAN tag insert/strip */
4932 ctrl |= E1000_CTRL_VME;
4935 if (adapter->hw.mac_type != e1000_ich8lan) {
4936 /* enable VLAN receive filtering */
4938 rctl &= ~E1000_RCTL_CFIEN;
4940 e1000_update_mng_vlan(adapter);
4943 /* disable VLAN tag insert/strip */
4945 ctrl &= ~E1000_CTRL_VME;
4948 if (adapter->hw.mac_type != e1000_ich8lan) {
4949 if (adapter->mng_vlan_id !=
4950 (u16)E1000_MNG_VLAN_NONE) {
4951 e1000_vlan_rx_kill_vid(netdev,
4952 adapter->mng_vlan_id);
4953 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4958 if (!test_bit(__E1000_DOWN, &adapter->flags))
4959 e1000_irq_enable(adapter);
4962 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4964 struct e1000_adapter *adapter = netdev_priv(netdev);
4965 struct e1000_hw *hw = &adapter->hw;
4968 if ((hw->mng_cookie.status &
4969 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4970 (vid == adapter->mng_vlan_id))
4972 /* add VID to filter table */
4973 index = (vid >> 5) & 0x7F;
4974 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4975 vfta |= (1 << (vid & 0x1F));
4976 e1000_write_vfta(hw, index, vfta);
4979 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4981 struct e1000_adapter *adapter = netdev_priv(netdev);
4982 struct e1000_hw *hw = &adapter->hw;
4985 if (!test_bit(__E1000_DOWN, &adapter->flags))
4986 e1000_irq_disable(adapter);
4987 vlan_group_set_device(adapter->vlgrp, vid, NULL);
4988 if (!test_bit(__E1000_DOWN, &adapter->flags))
4989 e1000_irq_enable(adapter);
4991 if ((hw->mng_cookie.status &
4992 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4993 (vid == adapter->mng_vlan_id)) {
4994 /* release control to f/w */
4995 e1000_release_hw_control(adapter);
4999 /* remove VID from filter table */
5000 index = (vid >> 5) & 0x7F;
5001 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
5002 vfta &= ~(1 << (vid & 0x1F));
5003 e1000_write_vfta(hw, index, vfta);
5006 static void e1000_restore_vlan(struct e1000_adapter *adapter)
5008 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5010 if (adapter->vlgrp) {
5012 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5013 if (!vlan_group_get_device(adapter->vlgrp, vid))
5015 e1000_vlan_rx_add_vid(adapter->netdev, vid);
5020 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
5022 struct e1000_hw *hw = &adapter->hw;
5026 /* Fiber NICs only allow 1000 gbps Full duplex */
5027 if ((hw->media_type == e1000_media_type_fiber) &&
5028 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5029 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5034 case SPEED_10 + DUPLEX_HALF:
5035 hw->forced_speed_duplex = e1000_10_half;
5037 case SPEED_10 + DUPLEX_FULL:
5038 hw->forced_speed_duplex = e1000_10_full;
5040 case SPEED_100 + DUPLEX_HALF:
5041 hw->forced_speed_duplex = e1000_100_half;
5043 case SPEED_100 + DUPLEX_FULL:
5044 hw->forced_speed_duplex = e1000_100_full;
5046 case SPEED_1000 + DUPLEX_FULL:
5048 hw->autoneg_advertised = ADVERTISE_1000_FULL;
5050 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5052 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5058 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5060 struct net_device *netdev = pci_get_drvdata(pdev);
5061 struct e1000_adapter *adapter = netdev_priv(netdev);
5062 struct e1000_hw *hw = &adapter->hw;
5063 u32 ctrl, ctrl_ext, rctl, status;
5064 u32 wufc = adapter->wol;
5069 netif_device_detach(netdev);
5071 if (netif_running(netdev)) {
5072 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5073 e1000_down(adapter);
5077 retval = pci_save_state(pdev);
5082 status = er32(STATUS);
5083 if (status & E1000_STATUS_LU)
5084 wufc &= ~E1000_WUFC_LNKC;
5087 e1000_setup_rctl(adapter);
5088 e1000_set_rx_mode(netdev);
5090 /* turn on all-multi mode if wake on multicast is enabled */
5091 if (wufc & E1000_WUFC_MC) {
5093 rctl |= E1000_RCTL_MPE;
5097 if (hw->mac_type >= e1000_82540) {
5099 /* advertise wake from D3Cold */
5100 #define E1000_CTRL_ADVD3WUC 0x00100000
5101 /* phy power management enable */
5102 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5103 ctrl |= E1000_CTRL_ADVD3WUC |
5104 E1000_CTRL_EN_PHY_PWR_MGMT;
5108 if (hw->media_type == e1000_media_type_fiber ||
5109 hw->media_type == e1000_media_type_internal_serdes) {
5110 /* keep the laser running in D3 */
5111 ctrl_ext = er32(CTRL_EXT);
5112 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5113 ew32(CTRL_EXT, ctrl_ext);
5116 /* Allow time for pending master requests to run */
5117 e1000_disable_pciex_master(hw);
5119 ew32(WUC, E1000_WUC_PME_EN);
5121 pci_enable_wake(pdev, PCI_D3hot, 1);
5122 pci_enable_wake(pdev, PCI_D3cold, 1);
5126 pci_enable_wake(pdev, PCI_D3hot, 0);
5127 pci_enable_wake(pdev, PCI_D3cold, 0);
5130 e1000_release_manageability(adapter);
5132 /* make sure adapter isn't asleep if manageability is enabled */
5133 if (adapter->en_mng_pt) {
5134 pci_enable_wake(pdev, PCI_D3hot, 1);
5135 pci_enable_wake(pdev, PCI_D3cold, 1);
5138 if (hw->phy_type == e1000_phy_igp_3)
5139 e1000_phy_powerdown_workaround(hw);
5141 if (netif_running(netdev))
5142 e1000_free_irq(adapter);
5144 /* Release control of h/w to f/w. If f/w is AMT enabled, this
5145 * would have already happened in close and is redundant. */
5146 e1000_release_hw_control(adapter);
5148 pci_disable_device(pdev);
5150 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5156 static int e1000_resume(struct pci_dev *pdev)
5158 struct net_device *netdev = pci_get_drvdata(pdev);
5159 struct e1000_adapter *adapter = netdev_priv(netdev);
5160 struct e1000_hw *hw = &adapter->hw;
5163 pci_set_power_state(pdev, PCI_D0);
5164 pci_restore_state(pdev);
5165 err = pci_enable_device(pdev);
5167 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5170 pci_set_master(pdev);
5172 pci_enable_wake(pdev, PCI_D3hot, 0);
5173 pci_enable_wake(pdev, PCI_D3cold, 0);
5175 if (netif_running(netdev)) {
5176 err = e1000_request_irq(adapter);
5181 e1000_power_up_phy(adapter);
5182 e1000_reset(adapter);
5185 e1000_init_manageability(adapter);
5187 if (netif_running(netdev))
5190 netif_device_attach(netdev);
5192 /* If the controller is 82573 and f/w is AMT, do not set
5193 * DRV_LOAD until the interface is up. For all other cases,
5194 * let the f/w know that the h/w is now under the control
5196 if (hw->mac_type != e1000_82573 ||
5197 !e1000_check_mng_mode(hw))
5198 e1000_get_hw_control(adapter);
5204 static void e1000_shutdown(struct pci_dev *pdev)
5206 e1000_suspend(pdev, PMSG_SUSPEND);
5209 #ifdef CONFIG_NET_POLL_CONTROLLER
5211 * Polling 'interrupt' - used by things like netconsole to send skbs
5212 * without having to re-enable interrupts. It's not called while
5213 * the interrupt routine is executing.
5215 static void e1000_netpoll(struct net_device *netdev)
5217 struct e1000_adapter *adapter = netdev_priv(netdev);
5219 disable_irq(adapter->pdev->irq);
5220 e1000_intr(adapter->pdev->irq, netdev);
5221 #ifndef CONFIG_E1000_NAPI
5222 adapter->clean_rx(adapter, adapter->rx_ring);
5224 enable_irq(adapter->pdev->irq);
5229 * e1000_io_error_detected - called when PCI error is detected
5230 * @pdev: Pointer to PCI device
5231 * @state: The current pci conneection state
5233 * This function is called after a PCI bus error affecting
5234 * this device has been detected.
5236 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5237 pci_channel_state_t state)
5239 struct net_device *netdev = pci_get_drvdata(pdev);
5240 struct e1000_adapter *adapter = netdev->priv;
5242 netif_device_detach(netdev);
5244 if (netif_running(netdev))
5245 e1000_down(adapter);
5246 pci_disable_device(pdev);
5248 /* Request a slot slot reset. */
5249 return PCI_ERS_RESULT_NEED_RESET;
5253 * e1000_io_slot_reset - called after the pci bus has been reset.
5254 * @pdev: Pointer to PCI device
5256 * Restart the card from scratch, as if from a cold-boot. Implementation
5257 * resembles the first-half of the e1000_resume routine.
5259 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5261 struct net_device *netdev = pci_get_drvdata(pdev);
5262 struct e1000_adapter *adapter = netdev->priv;
5263 struct e1000_hw *hw = &adapter->hw;
5265 if (pci_enable_device(pdev)) {
5266 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5267 return PCI_ERS_RESULT_DISCONNECT;
5269 pci_set_master(pdev);
5271 pci_enable_wake(pdev, PCI_D3hot, 0);
5272 pci_enable_wake(pdev, PCI_D3cold, 0);
5274 e1000_reset(adapter);
5277 return PCI_ERS_RESULT_RECOVERED;
5281 * e1000_io_resume - called when traffic can start flowing again.
5282 * @pdev: Pointer to PCI device
5284 * This callback is called when the error recovery driver tells us that
5285 * its OK to resume normal operation. Implementation resembles the
5286 * second-half of the e1000_resume routine.
5288 static void e1000_io_resume(struct pci_dev *pdev)
5290 struct net_device *netdev = pci_get_drvdata(pdev);
5291 struct e1000_adapter *adapter = netdev->priv;
5292 struct e1000_hw *hw = &adapter->hw;
5294 e1000_init_manageability(adapter);
5296 if (netif_running(netdev)) {
5297 if (e1000_up(adapter)) {
5298 printk("e1000: can't bring device back up after reset\n");
5303 netif_device_attach(netdev);
5305 /* If the controller is 82573 and f/w is AMT, do not set
5306 * DRV_LOAD until the interface is up. For all other cases,
5307 * let the f/w know that the h/w is now under the control
5309 if (hw->mac_type != e1000_82573 ||
5310 !e1000_check_mng_mode(hw))
5311 e1000_get_hw_control(adapter);