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 #define DRV_VERSION "7.3.21-k6-NAPI"
35 const char e1000_driver_version
[] = DRV_VERSION
;
36 static const char e1000_copyright
[] = "Copyright (c) 1999-2006 Intel Corporation.";
38 /* e1000_pci_tbl - PCI Device ID Table
40 * Last entry must be all 0s
43 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
45 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl
) = {
46 INTEL_E1000_ETHERNET_DEVICE(0x1000),
47 INTEL_E1000_ETHERNET_DEVICE(0x1001),
48 INTEL_E1000_ETHERNET_DEVICE(0x1004),
49 INTEL_E1000_ETHERNET_DEVICE(0x1008),
50 INTEL_E1000_ETHERNET_DEVICE(0x1009),
51 INTEL_E1000_ETHERNET_DEVICE(0x100C),
52 INTEL_E1000_ETHERNET_DEVICE(0x100D),
53 INTEL_E1000_ETHERNET_DEVICE(0x100E),
54 INTEL_E1000_ETHERNET_DEVICE(0x100F),
55 INTEL_E1000_ETHERNET_DEVICE(0x1010),
56 INTEL_E1000_ETHERNET_DEVICE(0x1011),
57 INTEL_E1000_ETHERNET_DEVICE(0x1012),
58 INTEL_E1000_ETHERNET_DEVICE(0x1013),
59 INTEL_E1000_ETHERNET_DEVICE(0x1014),
60 INTEL_E1000_ETHERNET_DEVICE(0x1015),
61 INTEL_E1000_ETHERNET_DEVICE(0x1016),
62 INTEL_E1000_ETHERNET_DEVICE(0x1017),
63 INTEL_E1000_ETHERNET_DEVICE(0x1018),
64 INTEL_E1000_ETHERNET_DEVICE(0x1019),
65 INTEL_E1000_ETHERNET_DEVICE(0x101A),
66 INTEL_E1000_ETHERNET_DEVICE(0x101D),
67 INTEL_E1000_ETHERNET_DEVICE(0x101E),
68 INTEL_E1000_ETHERNET_DEVICE(0x1026),
69 INTEL_E1000_ETHERNET_DEVICE(0x1027),
70 INTEL_E1000_ETHERNET_DEVICE(0x1028),
71 INTEL_E1000_ETHERNET_DEVICE(0x1075),
72 INTEL_E1000_ETHERNET_DEVICE(0x1076),
73 INTEL_E1000_ETHERNET_DEVICE(0x1077),
74 INTEL_E1000_ETHERNET_DEVICE(0x1078),
75 INTEL_E1000_ETHERNET_DEVICE(0x1079),
76 INTEL_E1000_ETHERNET_DEVICE(0x107A),
77 INTEL_E1000_ETHERNET_DEVICE(0x107B),
78 INTEL_E1000_ETHERNET_DEVICE(0x107C),
79 INTEL_E1000_ETHERNET_DEVICE(0x108A),
80 INTEL_E1000_ETHERNET_DEVICE(0x1099),
81 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
82 /* required last entry */
86 MODULE_DEVICE_TABLE(pci
, e1000_pci_tbl
);
88 int e1000_up(struct e1000_adapter
*adapter
);
89 void e1000_down(struct e1000_adapter
*adapter
);
90 void e1000_reinit_locked(struct e1000_adapter
*adapter
);
91 void e1000_reset(struct e1000_adapter
*adapter
);
92 int e1000_set_spd_dplx(struct e1000_adapter
*adapter
, u16 spddplx
);
93 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
);
94 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
);
95 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
);
96 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
);
97 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
98 struct e1000_tx_ring
*txdr
);
99 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
100 struct e1000_rx_ring
*rxdr
);
101 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
102 struct e1000_tx_ring
*tx_ring
);
103 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
104 struct e1000_rx_ring
*rx_ring
);
105 void e1000_update_stats(struct e1000_adapter
*adapter
);
107 static int e1000_init_module(void);
108 static void e1000_exit_module(void);
109 static int e1000_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
110 static void __devexit
e1000_remove(struct pci_dev
*pdev
);
111 static int e1000_alloc_queues(struct e1000_adapter
*adapter
);
112 static int e1000_sw_init(struct e1000_adapter
*adapter
);
113 static int e1000_open(struct net_device
*netdev
);
114 static int e1000_close(struct net_device
*netdev
);
115 static void e1000_configure_tx(struct e1000_adapter
*adapter
);
116 static void e1000_configure_rx(struct e1000_adapter
*adapter
);
117 static void e1000_setup_rctl(struct e1000_adapter
*adapter
);
118 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
);
119 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
);
120 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
121 struct e1000_tx_ring
*tx_ring
);
122 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
123 struct e1000_rx_ring
*rx_ring
);
124 static void e1000_set_rx_mode(struct net_device
*netdev
);
125 static void e1000_update_phy_info(unsigned long data
);
126 static void e1000_update_phy_info_task(struct work_struct
*work
);
127 static void e1000_watchdog(unsigned long data
);
128 static void e1000_82547_tx_fifo_stall(unsigned long data
);
129 static void e1000_82547_tx_fifo_stall_task(struct work_struct
*work
);
130 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
131 struct net_device
*netdev
);
132 static struct net_device_stats
* e1000_get_stats(struct net_device
*netdev
);
133 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
);
134 static int e1000_set_mac(struct net_device
*netdev
, void *p
);
135 static irqreturn_t
e1000_intr(int irq
, void *data
);
136 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
137 struct e1000_tx_ring
*tx_ring
);
138 static int e1000_clean(struct napi_struct
*napi
, int budget
);
139 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
140 struct e1000_rx_ring
*rx_ring
,
141 int *work_done
, int work_to_do
);
142 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
143 struct e1000_rx_ring
*rx_ring
,
144 int *work_done
, int work_to_do
);
145 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
146 struct e1000_rx_ring
*rx_ring
,
148 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
149 struct e1000_rx_ring
*rx_ring
,
151 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
);
152 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
154 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
);
155 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
);
156 static void e1000_tx_timeout(struct net_device
*dev
);
157 static void e1000_reset_task(struct work_struct
*work
);
158 static void e1000_smartspeed(struct e1000_adapter
*adapter
);
159 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
160 struct sk_buff
*skb
);
162 static void e1000_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
);
163 static void e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
);
164 static void e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
);
165 static void e1000_restore_vlan(struct e1000_adapter
*adapter
);
168 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
);
169 static int e1000_resume(struct pci_dev
*pdev
);
171 static void e1000_shutdown(struct pci_dev
*pdev
);
173 #ifdef CONFIG_NET_POLL_CONTROLLER
174 /* for netdump / net console */
175 static void e1000_netpoll (struct net_device
*netdev
);
178 #define COPYBREAK_DEFAULT 256
179 static unsigned int copybreak __read_mostly
= COPYBREAK_DEFAULT
;
180 module_param(copybreak
, uint
, 0644);
181 MODULE_PARM_DESC(copybreak
,
182 "Maximum size of packet that is copied to a new buffer on receive");
184 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
185 pci_channel_state_t state
);
186 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
);
187 static void e1000_io_resume(struct pci_dev
*pdev
);
189 static struct pci_error_handlers e1000_err_handler
= {
190 .error_detected
= e1000_io_error_detected
,
191 .slot_reset
= e1000_io_slot_reset
,
192 .resume
= e1000_io_resume
,
195 static struct pci_driver e1000_driver
= {
196 .name
= e1000_driver_name
,
197 .id_table
= e1000_pci_tbl
,
198 .probe
= e1000_probe
,
199 .remove
= __devexit_p(e1000_remove
),
201 /* Power Managment Hooks */
202 .suspend
= e1000_suspend
,
203 .resume
= e1000_resume
,
205 .shutdown
= e1000_shutdown
,
206 .err_handler
= &e1000_err_handler
209 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
210 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
211 MODULE_LICENSE("GPL");
212 MODULE_VERSION(DRV_VERSION
);
214 static int debug
= NETIF_MSG_DRV
| NETIF_MSG_PROBE
;
215 module_param(debug
, int, 0);
216 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
219 * e1000_get_hw_dev - return device
220 * used by hardware layer to print debugging information
223 struct net_device
*e1000_get_hw_dev(struct e1000_hw
*hw
)
225 struct e1000_adapter
*adapter
= hw
->back
;
226 return adapter
->netdev
;
230 * e1000_init_module - Driver Registration Routine
232 * e1000_init_module is the first routine called when the driver is
233 * loaded. All it does is register with the PCI subsystem.
236 static int __init
e1000_init_module(void)
239 pr_info("%s - version %s\n", e1000_driver_string
, e1000_driver_version
);
241 pr_info("%s\n", e1000_copyright
);
243 ret
= pci_register_driver(&e1000_driver
);
244 if (copybreak
!= COPYBREAK_DEFAULT
) {
246 pr_info("copybreak disabled\n");
248 pr_info("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 net_device
*netdev
= adapter
->netdev
;
273 irq_handler_t handler
= e1000_intr
;
274 int irq_flags
= IRQF_SHARED
;
277 err
= request_irq(adapter
->pdev
->irq
, handler
, irq_flags
, netdev
->name
,
280 e_err(probe
, "Unable to allocate interrupt Error: %d\n", err
);
286 static void e1000_free_irq(struct e1000_adapter
*adapter
)
288 struct net_device
*netdev
= adapter
->netdev
;
290 free_irq(adapter
->pdev
->irq
, netdev
);
294 * e1000_irq_disable - Mask off interrupt generation on the NIC
295 * @adapter: board private structure
298 static void e1000_irq_disable(struct e1000_adapter
*adapter
)
300 struct e1000_hw
*hw
= &adapter
->hw
;
304 synchronize_irq(adapter
->pdev
->irq
);
308 * e1000_irq_enable - Enable default interrupt generation settings
309 * @adapter: board private structure
312 static void e1000_irq_enable(struct e1000_adapter
*adapter
)
314 struct e1000_hw
*hw
= &adapter
->hw
;
316 ew32(IMS
, IMS_ENABLE_MASK
);
320 static void e1000_update_mng_vlan(struct e1000_adapter
*adapter
)
322 struct e1000_hw
*hw
= &adapter
->hw
;
323 struct net_device
*netdev
= adapter
->netdev
;
324 u16 vid
= hw
->mng_cookie
.vlan_id
;
325 u16 old_vid
= adapter
->mng_vlan_id
;
326 if (adapter
->vlgrp
) {
327 if (!vlan_group_get_device(adapter
->vlgrp
, vid
)) {
328 if (hw
->mng_cookie
.status
&
329 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) {
330 e1000_vlan_rx_add_vid(netdev
, vid
);
331 adapter
->mng_vlan_id
= vid
;
333 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
335 if ((old_vid
!= (u16
)E1000_MNG_VLAN_NONE
) &&
337 !vlan_group_get_device(adapter
->vlgrp
, old_vid
))
338 e1000_vlan_rx_kill_vid(netdev
, old_vid
);
340 adapter
->mng_vlan_id
= vid
;
344 static void e1000_init_manageability(struct e1000_adapter
*adapter
)
346 struct e1000_hw
*hw
= &adapter
->hw
;
348 if (adapter
->en_mng_pt
) {
349 u32 manc
= er32(MANC
);
351 /* disable hardware interception of ARP */
352 manc
&= ~(E1000_MANC_ARP_EN
);
358 static void e1000_release_manageability(struct e1000_adapter
*adapter
)
360 struct e1000_hw
*hw
= &adapter
->hw
;
362 if (adapter
->en_mng_pt
) {
363 u32 manc
= er32(MANC
);
365 /* re-enable hardware interception of ARP */
366 manc
|= E1000_MANC_ARP_EN
;
373 * e1000_configure - configure the hardware for RX and TX
374 * @adapter = private board structure
376 static void e1000_configure(struct e1000_adapter
*adapter
)
378 struct net_device
*netdev
= adapter
->netdev
;
381 e1000_set_rx_mode(netdev
);
383 e1000_restore_vlan(adapter
);
384 e1000_init_manageability(adapter
);
386 e1000_configure_tx(adapter
);
387 e1000_setup_rctl(adapter
);
388 e1000_configure_rx(adapter
);
389 /* call E1000_DESC_UNUSED which always leaves
390 * at least 1 descriptor unused to make sure
391 * next_to_use != next_to_clean */
392 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
393 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[i
];
394 adapter
->alloc_rx_buf(adapter
, ring
,
395 E1000_DESC_UNUSED(ring
));
399 int e1000_up(struct e1000_adapter
*adapter
)
401 struct e1000_hw
*hw
= &adapter
->hw
;
403 /* hardware has been reset, we need to reload some things */
404 e1000_configure(adapter
);
406 clear_bit(__E1000_DOWN
, &adapter
->flags
);
408 napi_enable(&adapter
->napi
);
410 e1000_irq_enable(adapter
);
412 netif_wake_queue(adapter
->netdev
);
414 /* fire a link change interrupt to start the watchdog */
415 ew32(ICS
, E1000_ICS_LSC
);
420 * e1000_power_up_phy - restore link in case the phy was powered down
421 * @adapter: address of board private structure
423 * The phy may be powered down to save power and turn off link when the
424 * driver is unloaded and wake on lan is not enabled (among others)
425 * *** this routine MUST be followed by a call to e1000_reset ***
429 void e1000_power_up_phy(struct e1000_adapter
*adapter
)
431 struct e1000_hw
*hw
= &adapter
->hw
;
434 /* Just clear the power down bit to wake the phy back up */
435 if (hw
->media_type
== e1000_media_type_copper
) {
436 /* according to the manual, the phy will retain its
437 * settings across a power-down/up cycle */
438 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
439 mii_reg
&= ~MII_CR_POWER_DOWN
;
440 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
444 static void e1000_power_down_phy(struct e1000_adapter
*adapter
)
446 struct e1000_hw
*hw
= &adapter
->hw
;
448 /* Power down the PHY so no link is implied when interface is down *
449 * The PHY cannot be powered down if any of the following is true *
452 * (c) SoL/IDER session is active */
453 if (!adapter
->wol
&& hw
->mac_type
>= e1000_82540
&&
454 hw
->media_type
== e1000_media_type_copper
) {
457 switch (hw
->mac_type
) {
460 case e1000_82545_rev_3
:
462 case e1000_82546_rev_3
:
464 case e1000_82541_rev_2
:
466 case e1000_82547_rev_2
:
467 if (er32(MANC
) & E1000_MANC_SMBUS_EN
)
473 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
474 mii_reg
|= MII_CR_POWER_DOWN
;
475 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
482 void e1000_down(struct e1000_adapter
*adapter
)
484 struct e1000_hw
*hw
= &adapter
->hw
;
485 struct net_device
*netdev
= adapter
->netdev
;
488 /* signal that we're down so the interrupt handler does not
489 * reschedule our watchdog timer */
490 set_bit(__E1000_DOWN
, &adapter
->flags
);
492 /* disable receives in the hardware */
494 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
495 /* flush and sleep below */
497 netif_tx_disable(netdev
);
499 /* disable transmits in the hardware */
501 tctl
&= ~E1000_TCTL_EN
;
503 /* flush both disables and wait for them to finish */
507 napi_disable(&adapter
->napi
);
509 e1000_irq_disable(adapter
);
511 del_timer_sync(&adapter
->tx_fifo_stall_timer
);
512 del_timer_sync(&adapter
->watchdog_timer
);
513 del_timer_sync(&adapter
->phy_info_timer
);
515 adapter
->link_speed
= 0;
516 adapter
->link_duplex
= 0;
517 netif_carrier_off(netdev
);
519 e1000_reset(adapter
);
520 e1000_clean_all_tx_rings(adapter
);
521 e1000_clean_all_rx_rings(adapter
);
524 void e1000_reinit_safe(struct e1000_adapter
*adapter
)
526 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
532 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
535 void e1000_reinit_locked(struct e1000_adapter
*adapter
)
537 /* if rtnl_lock is not held the call path is bogus */
539 WARN_ON(in_interrupt());
540 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
544 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
547 void e1000_reset(struct e1000_adapter
*adapter
)
549 struct e1000_hw
*hw
= &adapter
->hw
;
550 u32 pba
= 0, tx_space
, min_tx_space
, min_rx_space
;
551 bool legacy_pba_adjust
= false;
554 /* Repartition Pba for greater than 9k mtu
555 * To take effect CTRL.RST is required.
558 switch (hw
->mac_type
) {
559 case e1000_82542_rev2_0
:
560 case e1000_82542_rev2_1
:
565 case e1000_82541_rev_2
:
566 legacy_pba_adjust
= true;
570 case e1000_82545_rev_3
:
572 case e1000_82546_rev_3
:
576 case e1000_82547_rev_2
:
577 legacy_pba_adjust
= true;
580 case e1000_undefined
:
585 if (legacy_pba_adjust
) {
586 if (hw
->max_frame_size
> E1000_RXBUFFER_8192
)
587 pba
-= 8; /* allocate more FIFO for Tx */
589 if (hw
->mac_type
== e1000_82547
) {
590 adapter
->tx_fifo_head
= 0;
591 adapter
->tx_head_addr
= pba
<< E1000_TX_HEAD_ADDR_SHIFT
;
592 adapter
->tx_fifo_size
=
593 (E1000_PBA_40K
- pba
) << E1000_PBA_BYTES_SHIFT
;
594 atomic_set(&adapter
->tx_fifo_stall
, 0);
596 } else if (hw
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
597 /* adjust PBA for jumbo frames */
600 /* To maintain wire speed transmits, the Tx FIFO should be
601 * large enough to accommodate two full transmit packets,
602 * rounded up to the next 1KB and expressed in KB. Likewise,
603 * the Rx FIFO should be large enough to accommodate at least
604 * one full receive packet and is similarly rounded up and
605 * expressed in KB. */
607 /* upper 16 bits has Tx packet buffer allocation size in KB */
608 tx_space
= pba
>> 16;
609 /* lower 16 bits has Rx packet buffer allocation size in KB */
612 * the tx fifo also stores 16 bytes of information about the tx
613 * but don't include ethernet FCS because hardware appends it
615 min_tx_space
= (hw
->max_frame_size
+
616 sizeof(struct e1000_tx_desc
) -
618 min_tx_space
= ALIGN(min_tx_space
, 1024);
620 /* software strips receive CRC, so leave room for it */
621 min_rx_space
= hw
->max_frame_size
;
622 min_rx_space
= ALIGN(min_rx_space
, 1024);
625 /* If current Tx allocation is less than the min Tx FIFO size,
626 * and the min Tx FIFO size is less than the current Rx FIFO
627 * allocation, take space away from current Rx allocation */
628 if (tx_space
< min_tx_space
&&
629 ((min_tx_space
- tx_space
) < pba
)) {
630 pba
= pba
- (min_tx_space
- tx_space
);
632 /* PCI/PCIx hardware has PBA alignment constraints */
633 switch (hw
->mac_type
) {
634 case e1000_82545
... e1000_82546_rev_3
:
635 pba
&= ~(E1000_PBA_8K
- 1);
641 /* if short on rx space, rx wins and must trump tx
642 * adjustment or use Early Receive if available */
643 if (pba
< min_rx_space
)
651 * flow control settings:
652 * The high water mark must be low enough to fit one full frame
653 * (or the size used for early receive) above it in the Rx FIFO.
654 * Set it to the lower of:
655 * - 90% of the Rx FIFO size, and
656 * - the full Rx FIFO size minus the early receive size (for parts
657 * with ERT support assuming ERT set to E1000_ERT_2048), or
658 * - the full Rx FIFO size minus one full frame
660 hwm
= min(((pba
<< 10) * 9 / 10),
661 ((pba
<< 10) - hw
->max_frame_size
));
663 hw
->fc_high_water
= hwm
& 0xFFF8; /* 8-byte granularity */
664 hw
->fc_low_water
= hw
->fc_high_water
- 8;
665 hw
->fc_pause_time
= E1000_FC_PAUSE_TIME
;
667 hw
->fc
= hw
->original_fc
;
669 /* Allow time for pending master requests to run */
671 if (hw
->mac_type
>= e1000_82544
)
674 if (e1000_init_hw(hw
))
675 e_dev_err("Hardware Error\n");
676 e1000_update_mng_vlan(adapter
);
678 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
679 if (hw
->mac_type
>= e1000_82544
&&
681 hw
->autoneg_advertised
== ADVERTISE_1000_FULL
) {
682 u32 ctrl
= er32(CTRL
);
683 /* clear phy power management bit if we are in gig only mode,
684 * which if enabled will attempt negotiation to 100Mb, which
685 * can cause a loss of link at power off or driver unload */
686 ctrl
&= ~E1000_CTRL_SWDPIN3
;
690 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
691 ew32(VET
, ETHERNET_IEEE_VLAN_TYPE
);
693 e1000_reset_adaptive(hw
);
694 e1000_phy_get_info(hw
, &adapter
->phy_info
);
696 e1000_release_manageability(adapter
);
700 * Dump the eeprom for users having checksum issues
702 static void e1000_dump_eeprom(struct e1000_adapter
*adapter
)
704 struct net_device
*netdev
= adapter
->netdev
;
705 struct ethtool_eeprom eeprom
;
706 const struct ethtool_ops
*ops
= netdev
->ethtool_ops
;
709 u16 csum_old
, csum_new
= 0;
711 eeprom
.len
= ops
->get_eeprom_len(netdev
);
714 data
= kmalloc(eeprom
.len
, GFP_KERNEL
);
716 pr_err("Unable to allocate memory to dump EEPROM data\n");
720 ops
->get_eeprom(netdev
, &eeprom
, data
);
722 csum_old
= (data
[EEPROM_CHECKSUM_REG
* 2]) +
723 (data
[EEPROM_CHECKSUM_REG
* 2 + 1] << 8);
724 for (i
= 0; i
< EEPROM_CHECKSUM_REG
* 2; i
+= 2)
725 csum_new
+= data
[i
] + (data
[i
+ 1] << 8);
726 csum_new
= EEPROM_SUM
- csum_new
;
728 pr_err("/*********************/\n");
729 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old
);
730 pr_err("Calculated : 0x%04x\n", csum_new
);
732 pr_err("Offset Values\n");
733 pr_err("======== ======\n");
734 print_hex_dump(KERN_ERR
, "", DUMP_PREFIX_OFFSET
, 16, 1, data
, 128, 0);
736 pr_err("Include this output when contacting your support provider.\n");
737 pr_err("This is not a software error! Something bad happened to\n");
738 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
739 pr_err("result in further problems, possibly loss of data,\n");
740 pr_err("corruption or system hangs!\n");
741 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
742 pr_err("which is invalid and requires you to set the proper MAC\n");
743 pr_err("address manually before continuing to enable this network\n");
744 pr_err("device. Please inspect the EEPROM dump and report the\n");
745 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
746 pr_err("/*********************/\n");
752 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
753 * @pdev: PCI device information struct
755 * Return true if an adapter needs ioport resources
757 static int e1000_is_need_ioport(struct pci_dev
*pdev
)
759 switch (pdev
->device
) {
760 case E1000_DEV_ID_82540EM
:
761 case E1000_DEV_ID_82540EM_LOM
:
762 case E1000_DEV_ID_82540EP
:
763 case E1000_DEV_ID_82540EP_LOM
:
764 case E1000_DEV_ID_82540EP_LP
:
765 case E1000_DEV_ID_82541EI
:
766 case E1000_DEV_ID_82541EI_MOBILE
:
767 case E1000_DEV_ID_82541ER
:
768 case E1000_DEV_ID_82541ER_LOM
:
769 case E1000_DEV_ID_82541GI
:
770 case E1000_DEV_ID_82541GI_LF
:
771 case E1000_DEV_ID_82541GI_MOBILE
:
772 case E1000_DEV_ID_82544EI_COPPER
:
773 case E1000_DEV_ID_82544EI_FIBER
:
774 case E1000_DEV_ID_82544GC_COPPER
:
775 case E1000_DEV_ID_82544GC_LOM
:
776 case E1000_DEV_ID_82545EM_COPPER
:
777 case E1000_DEV_ID_82545EM_FIBER
:
778 case E1000_DEV_ID_82546EB_COPPER
:
779 case E1000_DEV_ID_82546EB_FIBER
:
780 case E1000_DEV_ID_82546EB_QUAD_COPPER
:
787 static const struct net_device_ops e1000_netdev_ops
= {
788 .ndo_open
= e1000_open
,
789 .ndo_stop
= e1000_close
,
790 .ndo_start_xmit
= e1000_xmit_frame
,
791 .ndo_get_stats
= e1000_get_stats
,
792 .ndo_set_rx_mode
= e1000_set_rx_mode
,
793 .ndo_set_mac_address
= e1000_set_mac
,
794 .ndo_tx_timeout
= e1000_tx_timeout
,
795 .ndo_change_mtu
= e1000_change_mtu
,
796 .ndo_do_ioctl
= e1000_ioctl
,
797 .ndo_validate_addr
= eth_validate_addr
,
799 .ndo_vlan_rx_register
= e1000_vlan_rx_register
,
800 .ndo_vlan_rx_add_vid
= e1000_vlan_rx_add_vid
,
801 .ndo_vlan_rx_kill_vid
= e1000_vlan_rx_kill_vid
,
802 #ifdef CONFIG_NET_POLL_CONTROLLER
803 .ndo_poll_controller
= e1000_netpoll
,
808 * e1000_init_hw_struct - initialize members of hw struct
809 * @adapter: board private struct
810 * @hw: structure used by e1000_hw.c
812 * Factors out initialization of the e1000_hw struct to its own function
813 * that can be called very early at init (just after struct allocation).
814 * Fields are initialized based on PCI device information and
815 * OS network device settings (MTU size).
816 * Returns negative error codes if MAC type setup fails.
818 static int e1000_init_hw_struct(struct e1000_adapter
*adapter
,
821 struct pci_dev
*pdev
= adapter
->pdev
;
823 /* PCI config space info */
824 hw
->vendor_id
= pdev
->vendor
;
825 hw
->device_id
= pdev
->device
;
826 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
827 hw
->subsystem_id
= pdev
->subsystem_device
;
828 hw
->revision_id
= pdev
->revision
;
830 pci_read_config_word(pdev
, PCI_COMMAND
, &hw
->pci_cmd_word
);
832 hw
->max_frame_size
= adapter
->netdev
->mtu
+
833 ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
834 hw
->min_frame_size
= MINIMUM_ETHERNET_FRAME_SIZE
;
836 /* identify the MAC */
837 if (e1000_set_mac_type(hw
)) {
838 e_err(probe
, "Unknown MAC Type\n");
842 switch (hw
->mac_type
) {
847 case e1000_82541_rev_2
:
848 case e1000_82547_rev_2
:
849 hw
->phy_init_script
= 1;
853 e1000_set_media_type(hw
);
854 e1000_get_bus_info(hw
);
856 hw
->wait_autoneg_complete
= false;
857 hw
->tbi_compatibility_en
= true;
858 hw
->adaptive_ifs
= true;
862 if (hw
->media_type
== e1000_media_type_copper
) {
863 hw
->mdix
= AUTO_ALL_MODES
;
864 hw
->disable_polarity_correction
= false;
865 hw
->master_slave
= E1000_MASTER_SLAVE
;
872 * e1000_probe - Device Initialization Routine
873 * @pdev: PCI device information struct
874 * @ent: entry in e1000_pci_tbl
876 * Returns 0 on success, negative on failure
878 * e1000_probe initializes an adapter identified by a pci_dev structure.
879 * The OS initialization, configuring of the adapter private structure,
880 * and a hardware reset occur.
882 static int __devinit
e1000_probe(struct pci_dev
*pdev
,
883 const struct pci_device_id
*ent
)
885 struct net_device
*netdev
;
886 struct e1000_adapter
*adapter
;
889 static int cards_found
= 0;
890 static int global_quad_port_a
= 0; /* global ksp3 port a indication */
891 int i
, err
, pci_using_dac
;
893 u16 eeprom_apme_mask
= E1000_EEPROM_APME
;
894 int bars
, need_ioport
;
896 /* do not allocate ioport bars when not needed */
897 need_ioport
= e1000_is_need_ioport(pdev
);
899 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
| IORESOURCE_IO
);
900 err
= pci_enable_device(pdev
);
902 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
);
903 err
= pci_enable_device_mem(pdev
);
908 err
= pci_request_selected_regions(pdev
, bars
, e1000_driver_name
);
912 pci_set_master(pdev
);
913 err
= pci_save_state(pdev
);
915 goto err_alloc_etherdev
;
918 netdev
= alloc_etherdev(sizeof(struct e1000_adapter
));
920 goto err_alloc_etherdev
;
922 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
924 pci_set_drvdata(pdev
, netdev
);
925 adapter
= netdev_priv(netdev
);
926 adapter
->netdev
= netdev
;
927 adapter
->pdev
= pdev
;
928 adapter
->msg_enable
= (1 << debug
) - 1;
929 adapter
->bars
= bars
;
930 adapter
->need_ioport
= need_ioport
;
936 hw
->hw_addr
= pci_ioremap_bar(pdev
, BAR_0
);
940 if (adapter
->need_ioport
) {
941 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
942 if (pci_resource_len(pdev
, i
) == 0)
944 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
945 hw
->io_base
= pci_resource_start(pdev
, i
);
951 /* make ready for any if (hw->...) below */
952 err
= e1000_init_hw_struct(adapter
, hw
);
957 * there is a workaround being applied below that limits
958 * 64-bit DMA addresses to 64-bit hardware. There are some
959 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
962 if ((hw
->bus_type
== e1000_bus_type_pcix
) &&
963 !dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(64))) {
965 * according to DMA-API-HOWTO, coherent calls will always
966 * succeed if the set call did
968 dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(64));
970 } else if (!dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32))) {
971 dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(32));
973 pr_err("No usable DMA config, aborting\n");
977 netdev
->netdev_ops
= &e1000_netdev_ops
;
978 e1000_set_ethtool_ops(netdev
);
979 netdev
->watchdog_timeo
= 5 * HZ
;
980 netif_napi_add(netdev
, &adapter
->napi
, e1000_clean
, 64);
982 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
984 adapter
->bd_number
= cards_found
;
986 /* setup the private structure */
988 err
= e1000_sw_init(adapter
);
994 if (hw
->mac_type
>= e1000_82543
) {
995 netdev
->features
= NETIF_F_SG
|
999 NETIF_F_HW_VLAN_FILTER
;
1002 if ((hw
->mac_type
>= e1000_82544
) &&
1003 (hw
->mac_type
!= e1000_82547
))
1004 netdev
->features
|= NETIF_F_TSO
;
1006 if (pci_using_dac
) {
1007 netdev
->features
|= NETIF_F_HIGHDMA
;
1008 netdev
->vlan_features
|= NETIF_F_HIGHDMA
;
1011 netdev
->vlan_features
|= NETIF_F_TSO
;
1012 netdev
->vlan_features
|= NETIF_F_HW_CSUM
;
1013 netdev
->vlan_features
|= NETIF_F_SG
;
1015 adapter
->en_mng_pt
= e1000_enable_mng_pass_thru(hw
);
1017 /* initialize eeprom parameters */
1018 if (e1000_init_eeprom_params(hw
)) {
1019 e_err(probe
, "EEPROM initialization failed\n");
1023 /* before reading the EEPROM, reset the controller to
1024 * put the device in a known good starting state */
1028 /* make sure the EEPROM is good */
1029 if (e1000_validate_eeprom_checksum(hw
) < 0) {
1030 e_err(probe
, "The EEPROM Checksum Is Not Valid\n");
1031 e1000_dump_eeprom(adapter
);
1033 * set MAC address to all zeroes to invalidate and temporary
1034 * disable this device for the user. This blocks regular
1035 * traffic while still permitting ethtool ioctls from reaching
1036 * the hardware as well as allowing the user to run the
1037 * interface after manually setting a hw addr using
1040 memset(hw
->mac_addr
, 0, netdev
->addr_len
);
1042 /* copy the MAC address out of the EEPROM */
1043 if (e1000_read_mac_addr(hw
))
1044 e_err(probe
, "EEPROM Read Error\n");
1046 /* don't block initalization here due to bad MAC address */
1047 memcpy(netdev
->dev_addr
, hw
->mac_addr
, netdev
->addr_len
);
1048 memcpy(netdev
->perm_addr
, hw
->mac_addr
, netdev
->addr_len
);
1050 if (!is_valid_ether_addr(netdev
->perm_addr
))
1051 e_err(probe
, "Invalid MAC Address\n");
1053 init_timer(&adapter
->tx_fifo_stall_timer
);
1054 adapter
->tx_fifo_stall_timer
.function
= e1000_82547_tx_fifo_stall
;
1055 adapter
->tx_fifo_stall_timer
.data
= (unsigned long)adapter
;
1057 init_timer(&adapter
->watchdog_timer
);
1058 adapter
->watchdog_timer
.function
= e1000_watchdog
;
1059 adapter
->watchdog_timer
.data
= (unsigned long) adapter
;
1061 init_timer(&adapter
->phy_info_timer
);
1062 adapter
->phy_info_timer
.function
= e1000_update_phy_info
;
1063 adapter
->phy_info_timer
.data
= (unsigned long)adapter
;
1065 INIT_WORK(&adapter
->fifo_stall_task
, e1000_82547_tx_fifo_stall_task
);
1066 INIT_WORK(&adapter
->reset_task
, e1000_reset_task
);
1067 INIT_WORK(&adapter
->phy_info_task
, e1000_update_phy_info_task
);
1069 e1000_check_options(adapter
);
1071 /* Initial Wake on LAN setting
1072 * If APM wake is enabled in the EEPROM,
1073 * enable the ACPI Magic Packet filter
1076 switch (hw
->mac_type
) {
1077 case e1000_82542_rev2_0
:
1078 case e1000_82542_rev2_1
:
1082 e1000_read_eeprom(hw
,
1083 EEPROM_INIT_CONTROL2_REG
, 1, &eeprom_data
);
1084 eeprom_apme_mask
= E1000_EEPROM_82544_APM
;
1087 case e1000_82546_rev_3
:
1088 if (er32(STATUS
) & E1000_STATUS_FUNC_1
){
1089 e1000_read_eeprom(hw
,
1090 EEPROM_INIT_CONTROL3_PORT_B
, 1, &eeprom_data
);
1095 e1000_read_eeprom(hw
,
1096 EEPROM_INIT_CONTROL3_PORT_A
, 1, &eeprom_data
);
1099 if (eeprom_data
& eeprom_apme_mask
)
1100 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
1102 /* now that we have the eeprom settings, apply the special cases
1103 * where the eeprom may be wrong or the board simply won't support
1104 * wake on lan on a particular port */
1105 switch (pdev
->device
) {
1106 case E1000_DEV_ID_82546GB_PCIE
:
1107 adapter
->eeprom_wol
= 0;
1109 case E1000_DEV_ID_82546EB_FIBER
:
1110 case E1000_DEV_ID_82546GB_FIBER
:
1111 /* Wake events only supported on port A for dual fiber
1112 * regardless of eeprom setting */
1113 if (er32(STATUS
) & E1000_STATUS_FUNC_1
)
1114 adapter
->eeprom_wol
= 0;
1116 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3
:
1117 /* if quad port adapter, disable WoL on all but port A */
1118 if (global_quad_port_a
!= 0)
1119 adapter
->eeprom_wol
= 0;
1121 adapter
->quad_port_a
= 1;
1122 /* Reset for multiple quad port adapters */
1123 if (++global_quad_port_a
== 4)
1124 global_quad_port_a
= 0;
1128 /* initialize the wol settings based on the eeprom settings */
1129 adapter
->wol
= adapter
->eeprom_wol
;
1130 device_set_wakeup_enable(&adapter
->pdev
->dev
, adapter
->wol
);
1132 /* reset the hardware with the new settings */
1133 e1000_reset(adapter
);
1135 strcpy(netdev
->name
, "eth%d");
1136 err
= register_netdev(netdev
);
1140 /* print bus type/speed/width info */
1141 e_info(probe
, "(PCI%s:%dMHz:%d-bit) %pM\n",
1142 ((hw
->bus_type
== e1000_bus_type_pcix
) ? "-X" : ""),
1143 ((hw
->bus_speed
== e1000_bus_speed_133
) ? 133 :
1144 (hw
->bus_speed
== e1000_bus_speed_120
) ? 120 :
1145 (hw
->bus_speed
== e1000_bus_speed_100
) ? 100 :
1146 (hw
->bus_speed
== e1000_bus_speed_66
) ? 66 : 33),
1147 ((hw
->bus_width
== e1000_bus_width_64
) ? 64 : 32),
1150 /* carrier off reporting is important to ethtool even BEFORE open */
1151 netif_carrier_off(netdev
);
1153 e_info(probe
, "Intel(R) PRO/1000 Network Connection\n");
1160 e1000_phy_hw_reset(hw
);
1162 if (hw
->flash_address
)
1163 iounmap(hw
->flash_address
);
1164 kfree(adapter
->tx_ring
);
1165 kfree(adapter
->rx_ring
);
1168 iounmap(hw
->hw_addr
);
1170 free_netdev(netdev
);
1172 pci_release_selected_regions(pdev
, bars
);
1174 pci_disable_device(pdev
);
1179 * e1000_remove - Device Removal Routine
1180 * @pdev: PCI device information struct
1182 * e1000_remove is called by the PCI subsystem to alert the driver
1183 * that it should release a PCI device. The could be caused by a
1184 * Hot-Plug event, or because the driver is going to be removed from
1188 static void __devexit
e1000_remove(struct pci_dev
*pdev
)
1190 struct net_device
*netdev
= pci_get_drvdata(pdev
);
1191 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1192 struct e1000_hw
*hw
= &adapter
->hw
;
1194 set_bit(__E1000_DOWN
, &adapter
->flags
);
1195 del_timer_sync(&adapter
->tx_fifo_stall_timer
);
1196 del_timer_sync(&adapter
->watchdog_timer
);
1197 del_timer_sync(&adapter
->phy_info_timer
);
1199 cancel_work_sync(&adapter
->reset_task
);
1201 e1000_release_manageability(adapter
);
1203 unregister_netdev(netdev
);
1205 e1000_phy_hw_reset(hw
);
1207 kfree(adapter
->tx_ring
);
1208 kfree(adapter
->rx_ring
);
1210 iounmap(hw
->hw_addr
);
1211 if (hw
->flash_address
)
1212 iounmap(hw
->flash_address
);
1213 pci_release_selected_regions(pdev
, adapter
->bars
);
1215 free_netdev(netdev
);
1217 pci_disable_device(pdev
);
1221 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1222 * @adapter: board private structure to initialize
1224 * e1000_sw_init initializes the Adapter private data structure.
1225 * e1000_init_hw_struct MUST be called before this function
1228 static int __devinit
e1000_sw_init(struct e1000_adapter
*adapter
)
1230 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
1232 adapter
->num_tx_queues
= 1;
1233 adapter
->num_rx_queues
= 1;
1235 if (e1000_alloc_queues(adapter
)) {
1236 e_err(probe
, "Unable to allocate memory for queues\n");
1240 /* Explicitly disable IRQ since the NIC can be in any state. */
1241 e1000_irq_disable(adapter
);
1243 spin_lock_init(&adapter
->stats_lock
);
1245 set_bit(__E1000_DOWN
, &adapter
->flags
);
1251 * e1000_alloc_queues - Allocate memory for all rings
1252 * @adapter: board private structure to initialize
1254 * We allocate one ring per queue at run-time since we don't know the
1255 * number of queues at compile-time.
1258 static int __devinit
e1000_alloc_queues(struct e1000_adapter
*adapter
)
1260 adapter
->tx_ring
= kcalloc(adapter
->num_tx_queues
,
1261 sizeof(struct e1000_tx_ring
), GFP_KERNEL
);
1262 if (!adapter
->tx_ring
)
1265 adapter
->rx_ring
= kcalloc(adapter
->num_rx_queues
,
1266 sizeof(struct e1000_rx_ring
), GFP_KERNEL
);
1267 if (!adapter
->rx_ring
) {
1268 kfree(adapter
->tx_ring
);
1272 return E1000_SUCCESS
;
1276 * e1000_open - Called when a network interface is made active
1277 * @netdev: network interface device structure
1279 * Returns 0 on success, negative value on failure
1281 * The open entry point is called when a network interface is made
1282 * active by the system (IFF_UP). At this point all resources needed
1283 * for transmit and receive operations are allocated, the interrupt
1284 * handler is registered with the OS, the watchdog timer is started,
1285 * and the stack is notified that the interface is ready.
1288 static int e1000_open(struct net_device
*netdev
)
1290 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1291 struct e1000_hw
*hw
= &adapter
->hw
;
1294 /* disallow open during test */
1295 if (test_bit(__E1000_TESTING
, &adapter
->flags
))
1298 netif_carrier_off(netdev
);
1300 /* allocate transmit descriptors */
1301 err
= e1000_setup_all_tx_resources(adapter
);
1305 /* allocate receive descriptors */
1306 err
= e1000_setup_all_rx_resources(adapter
);
1310 e1000_power_up_phy(adapter
);
1312 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
1313 if ((hw
->mng_cookie
.status
&
1314 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
)) {
1315 e1000_update_mng_vlan(adapter
);
1318 /* before we allocate an interrupt, we must be ready to handle it.
1319 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1320 * as soon as we call pci_request_irq, so we have to setup our
1321 * clean_rx handler before we do so. */
1322 e1000_configure(adapter
);
1324 err
= e1000_request_irq(adapter
);
1328 /* From here on the code is the same as e1000_up() */
1329 clear_bit(__E1000_DOWN
, &adapter
->flags
);
1331 napi_enable(&adapter
->napi
);
1333 e1000_irq_enable(adapter
);
1335 netif_start_queue(netdev
);
1337 /* fire a link status change interrupt to start the watchdog */
1338 ew32(ICS
, E1000_ICS_LSC
);
1340 return E1000_SUCCESS
;
1343 e1000_power_down_phy(adapter
);
1344 e1000_free_all_rx_resources(adapter
);
1346 e1000_free_all_tx_resources(adapter
);
1348 e1000_reset(adapter
);
1354 * e1000_close - Disables a network interface
1355 * @netdev: network interface device structure
1357 * Returns 0, this is not allowed to fail
1359 * The close entry point is called when an interface is de-activated
1360 * by the OS. The hardware is still under the drivers control, but
1361 * needs to be disabled. A global MAC reset is issued to stop the
1362 * hardware, and all transmit and receive resources are freed.
1365 static int e1000_close(struct net_device
*netdev
)
1367 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1368 struct e1000_hw
*hw
= &adapter
->hw
;
1370 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
1371 e1000_down(adapter
);
1372 e1000_power_down_phy(adapter
);
1373 e1000_free_irq(adapter
);
1375 e1000_free_all_tx_resources(adapter
);
1376 e1000_free_all_rx_resources(adapter
);
1378 /* kill manageability vlan ID if supported, but not if a vlan with
1379 * the same ID is registered on the host OS (let 8021q kill it) */
1380 if ((hw
->mng_cookie
.status
&
1381 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
1383 vlan_group_get_device(adapter
->vlgrp
, adapter
->mng_vlan_id
))) {
1384 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
1391 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1392 * @adapter: address of board private structure
1393 * @start: address of beginning of memory
1394 * @len: length of memory
1396 static bool e1000_check_64k_bound(struct e1000_adapter
*adapter
, void *start
,
1399 struct e1000_hw
*hw
= &adapter
->hw
;
1400 unsigned long begin
= (unsigned long)start
;
1401 unsigned long end
= begin
+ len
;
1403 /* First rev 82545 and 82546 need to not allow any memory
1404 * write location to cross 64k boundary due to errata 23 */
1405 if (hw
->mac_type
== e1000_82545
||
1406 hw
->mac_type
== e1000_82546
) {
1407 return ((begin
^ (end
- 1)) >> 16) != 0 ? false : true;
1414 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1415 * @adapter: board private structure
1416 * @txdr: tx descriptor ring (for a specific queue) to setup
1418 * Return 0 on success, negative on failure
1421 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
1422 struct e1000_tx_ring
*txdr
)
1424 struct pci_dev
*pdev
= adapter
->pdev
;
1427 size
= sizeof(struct e1000_buffer
) * txdr
->count
;
1428 txdr
->buffer_info
= vmalloc(size
);
1429 if (!txdr
->buffer_info
) {
1430 e_err(probe
, "Unable to allocate memory for the Tx descriptor "
1434 memset(txdr
->buffer_info
, 0, size
);
1436 /* round up to nearest 4K */
1438 txdr
->size
= txdr
->count
* sizeof(struct e1000_tx_desc
);
1439 txdr
->size
= ALIGN(txdr
->size
, 4096);
1441 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
, &txdr
->dma
,
1445 vfree(txdr
->buffer_info
);
1446 e_err(probe
, "Unable to allocate memory for the Tx descriptor "
1451 /* Fix for errata 23, can't cross 64kB boundary */
1452 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1453 void *olddesc
= txdr
->desc
;
1454 dma_addr_t olddma
= txdr
->dma
;
1455 e_err(tx_err
, "txdr align check failed: %u bytes at %p\n",
1456 txdr
->size
, txdr
->desc
);
1457 /* Try again, without freeing the previous */
1458 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
,
1459 &txdr
->dma
, GFP_KERNEL
);
1460 /* Failed allocation, critical failure */
1462 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1464 goto setup_tx_desc_die
;
1467 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1469 dma_free_coherent(&pdev
->dev
, txdr
->size
, txdr
->desc
,
1471 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1473 e_err(probe
, "Unable to allocate aligned memory "
1474 "for the transmit descriptor ring\n");
1475 vfree(txdr
->buffer_info
);
1478 /* Free old allocation, new allocation was successful */
1479 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1483 memset(txdr
->desc
, 0, txdr
->size
);
1485 txdr
->next_to_use
= 0;
1486 txdr
->next_to_clean
= 0;
1492 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1493 * (Descriptors) for all queues
1494 * @adapter: board private structure
1496 * Return 0 on success, negative on failure
1499 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
)
1503 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
1504 err
= e1000_setup_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1506 e_err(probe
, "Allocation for Tx Queue %u failed\n", i
);
1507 for (i
-- ; i
>= 0; i
--)
1508 e1000_free_tx_resources(adapter
,
1509 &adapter
->tx_ring
[i
]);
1518 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1519 * @adapter: board private structure
1521 * Configure the Tx unit of the MAC after a reset.
1524 static void e1000_configure_tx(struct e1000_adapter
*adapter
)
1527 struct e1000_hw
*hw
= &adapter
->hw
;
1528 u32 tdlen
, tctl
, tipg
;
1531 /* Setup the HW Tx Head and Tail descriptor pointers */
1533 switch (adapter
->num_tx_queues
) {
1536 tdba
= adapter
->tx_ring
[0].dma
;
1537 tdlen
= adapter
->tx_ring
[0].count
*
1538 sizeof(struct e1000_tx_desc
);
1540 ew32(TDBAH
, (tdba
>> 32));
1541 ew32(TDBAL
, (tdba
& 0x00000000ffffffffULL
));
1544 adapter
->tx_ring
[0].tdh
= ((hw
->mac_type
>= e1000_82543
) ? E1000_TDH
: E1000_82542_TDH
);
1545 adapter
->tx_ring
[0].tdt
= ((hw
->mac_type
>= e1000_82543
) ? E1000_TDT
: E1000_82542_TDT
);
1549 /* Set the default values for the Tx Inter Packet Gap timer */
1550 if ((hw
->media_type
== e1000_media_type_fiber
||
1551 hw
->media_type
== e1000_media_type_internal_serdes
))
1552 tipg
= DEFAULT_82543_TIPG_IPGT_FIBER
;
1554 tipg
= DEFAULT_82543_TIPG_IPGT_COPPER
;
1556 switch (hw
->mac_type
) {
1557 case e1000_82542_rev2_0
:
1558 case e1000_82542_rev2_1
:
1559 tipg
= DEFAULT_82542_TIPG_IPGT
;
1560 ipgr1
= DEFAULT_82542_TIPG_IPGR1
;
1561 ipgr2
= DEFAULT_82542_TIPG_IPGR2
;
1564 ipgr1
= DEFAULT_82543_TIPG_IPGR1
;
1565 ipgr2
= DEFAULT_82543_TIPG_IPGR2
;
1568 tipg
|= ipgr1
<< E1000_TIPG_IPGR1_SHIFT
;
1569 tipg
|= ipgr2
<< E1000_TIPG_IPGR2_SHIFT
;
1572 /* Set the Tx Interrupt Delay register */
1574 ew32(TIDV
, adapter
->tx_int_delay
);
1575 if (hw
->mac_type
>= e1000_82540
)
1576 ew32(TADV
, adapter
->tx_abs_int_delay
);
1578 /* Program the Transmit Control Register */
1581 tctl
&= ~E1000_TCTL_CT
;
1582 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
1583 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
1585 e1000_config_collision_dist(hw
);
1587 /* Setup Transmit Descriptor Settings for eop descriptor */
1588 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_IFCS
;
1590 /* only set IDE if we are delaying interrupts using the timers */
1591 if (adapter
->tx_int_delay
)
1592 adapter
->txd_cmd
|= E1000_TXD_CMD_IDE
;
1594 if (hw
->mac_type
< e1000_82543
)
1595 adapter
->txd_cmd
|= E1000_TXD_CMD_RPS
;
1597 adapter
->txd_cmd
|= E1000_TXD_CMD_RS
;
1599 /* Cache if we're 82544 running in PCI-X because we'll
1600 * need this to apply a workaround later in the send path. */
1601 if (hw
->mac_type
== e1000_82544
&&
1602 hw
->bus_type
== e1000_bus_type_pcix
)
1603 adapter
->pcix_82544
= 1;
1610 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1611 * @adapter: board private structure
1612 * @rxdr: rx descriptor ring (for a specific queue) to setup
1614 * Returns 0 on success, negative on failure
1617 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
1618 struct e1000_rx_ring
*rxdr
)
1620 struct pci_dev
*pdev
= adapter
->pdev
;
1623 size
= sizeof(struct e1000_buffer
) * rxdr
->count
;
1624 rxdr
->buffer_info
= vmalloc(size
);
1625 if (!rxdr
->buffer_info
) {
1626 e_err(probe
, "Unable to allocate memory for the Rx descriptor "
1630 memset(rxdr
->buffer_info
, 0, size
);
1632 desc_len
= sizeof(struct e1000_rx_desc
);
1634 /* Round up to nearest 4K */
1636 rxdr
->size
= rxdr
->count
* desc_len
;
1637 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
1639 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
, &rxdr
->dma
,
1643 e_err(probe
, "Unable to allocate memory for the Rx descriptor "
1646 vfree(rxdr
->buffer_info
);
1650 /* Fix for errata 23, can't cross 64kB boundary */
1651 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1652 void *olddesc
= rxdr
->desc
;
1653 dma_addr_t olddma
= rxdr
->dma
;
1654 e_err(rx_err
, "rxdr align check failed: %u bytes at %p\n",
1655 rxdr
->size
, rxdr
->desc
);
1656 /* Try again, without freeing the previous */
1657 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
,
1658 &rxdr
->dma
, GFP_KERNEL
);
1659 /* Failed allocation, critical failure */
1661 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1663 e_err(probe
, "Unable to allocate memory for the Rx "
1664 "descriptor ring\n");
1665 goto setup_rx_desc_die
;
1668 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1670 dma_free_coherent(&pdev
->dev
, rxdr
->size
, rxdr
->desc
,
1672 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1674 e_err(probe
, "Unable to allocate aligned memory for "
1675 "the Rx descriptor ring\n");
1676 goto setup_rx_desc_die
;
1678 /* Free old allocation, new allocation was successful */
1679 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1683 memset(rxdr
->desc
, 0, rxdr
->size
);
1685 rxdr
->next_to_clean
= 0;
1686 rxdr
->next_to_use
= 0;
1687 rxdr
->rx_skb_top
= NULL
;
1693 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1694 * (Descriptors) for all queues
1695 * @adapter: board private structure
1697 * Return 0 on success, negative on failure
1700 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
)
1704 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1705 err
= e1000_setup_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
1707 e_err(probe
, "Allocation for Rx Queue %u failed\n", i
);
1708 for (i
-- ; i
>= 0; i
--)
1709 e1000_free_rx_resources(adapter
,
1710 &adapter
->rx_ring
[i
]);
1719 * e1000_setup_rctl - configure the receive control registers
1720 * @adapter: Board private structure
1722 static void e1000_setup_rctl(struct e1000_adapter
*adapter
)
1724 struct e1000_hw
*hw
= &adapter
->hw
;
1729 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
1731 rctl
|= E1000_RCTL_EN
| E1000_RCTL_BAM
|
1732 E1000_RCTL_LBM_NO
| E1000_RCTL_RDMTS_HALF
|
1733 (hw
->mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
1735 if (hw
->tbi_compatibility_on
== 1)
1736 rctl
|= E1000_RCTL_SBP
;
1738 rctl
&= ~E1000_RCTL_SBP
;
1740 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
1741 rctl
&= ~E1000_RCTL_LPE
;
1743 rctl
|= E1000_RCTL_LPE
;
1745 /* Setup buffer sizes */
1746 rctl
&= ~E1000_RCTL_SZ_4096
;
1747 rctl
|= E1000_RCTL_BSEX
;
1748 switch (adapter
->rx_buffer_len
) {
1749 case E1000_RXBUFFER_2048
:
1751 rctl
|= E1000_RCTL_SZ_2048
;
1752 rctl
&= ~E1000_RCTL_BSEX
;
1754 case E1000_RXBUFFER_4096
:
1755 rctl
|= E1000_RCTL_SZ_4096
;
1757 case E1000_RXBUFFER_8192
:
1758 rctl
|= E1000_RCTL_SZ_8192
;
1760 case E1000_RXBUFFER_16384
:
1761 rctl
|= E1000_RCTL_SZ_16384
;
1769 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1770 * @adapter: board private structure
1772 * Configure the Rx unit of the MAC after a reset.
1775 static void e1000_configure_rx(struct e1000_adapter
*adapter
)
1778 struct e1000_hw
*hw
= &adapter
->hw
;
1779 u32 rdlen
, rctl
, rxcsum
;
1781 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
1782 rdlen
= adapter
->rx_ring
[0].count
*
1783 sizeof(struct e1000_rx_desc
);
1784 adapter
->clean_rx
= e1000_clean_jumbo_rx_irq
;
1785 adapter
->alloc_rx_buf
= e1000_alloc_jumbo_rx_buffers
;
1787 rdlen
= adapter
->rx_ring
[0].count
*
1788 sizeof(struct e1000_rx_desc
);
1789 adapter
->clean_rx
= e1000_clean_rx_irq
;
1790 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers
;
1793 /* disable receives while setting up the descriptors */
1795 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1797 /* set the Receive Delay Timer Register */
1798 ew32(RDTR
, adapter
->rx_int_delay
);
1800 if (hw
->mac_type
>= e1000_82540
) {
1801 ew32(RADV
, adapter
->rx_abs_int_delay
);
1802 if (adapter
->itr_setting
!= 0)
1803 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
1806 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1807 * the Base and Length of the Rx Descriptor Ring */
1808 switch (adapter
->num_rx_queues
) {
1811 rdba
= adapter
->rx_ring
[0].dma
;
1813 ew32(RDBAH
, (rdba
>> 32));
1814 ew32(RDBAL
, (rdba
& 0x00000000ffffffffULL
));
1817 adapter
->rx_ring
[0].rdh
= ((hw
->mac_type
>= e1000_82543
) ? E1000_RDH
: E1000_82542_RDH
);
1818 adapter
->rx_ring
[0].rdt
= ((hw
->mac_type
>= e1000_82543
) ? E1000_RDT
: E1000_82542_RDT
);
1822 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1823 if (hw
->mac_type
>= e1000_82543
) {
1824 rxcsum
= er32(RXCSUM
);
1825 if (adapter
->rx_csum
)
1826 rxcsum
|= E1000_RXCSUM_TUOFL
;
1828 /* don't need to clear IPPCSE as it defaults to 0 */
1829 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
1830 ew32(RXCSUM
, rxcsum
);
1833 /* Enable Receives */
1838 * e1000_free_tx_resources - Free Tx Resources per Queue
1839 * @adapter: board private structure
1840 * @tx_ring: Tx descriptor ring for a specific queue
1842 * Free all transmit software resources
1845 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
1846 struct e1000_tx_ring
*tx_ring
)
1848 struct pci_dev
*pdev
= adapter
->pdev
;
1850 e1000_clean_tx_ring(adapter
, tx_ring
);
1852 vfree(tx_ring
->buffer_info
);
1853 tx_ring
->buffer_info
= NULL
;
1855 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
1858 tx_ring
->desc
= NULL
;
1862 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1863 * @adapter: board private structure
1865 * Free all transmit software resources
1868 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
)
1872 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1873 e1000_free_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1876 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter
*adapter
,
1877 struct e1000_buffer
*buffer_info
)
1879 if (buffer_info
->dma
) {
1880 if (buffer_info
->mapped_as_page
)
1881 dma_unmap_page(&adapter
->pdev
->dev
, buffer_info
->dma
,
1882 buffer_info
->length
, DMA_TO_DEVICE
);
1884 dma_unmap_single(&adapter
->pdev
->dev
, buffer_info
->dma
,
1885 buffer_info
->length
,
1887 buffer_info
->dma
= 0;
1889 if (buffer_info
->skb
) {
1890 dev_kfree_skb_any(buffer_info
->skb
);
1891 buffer_info
->skb
= NULL
;
1893 buffer_info
->time_stamp
= 0;
1894 /* buffer_info must be completely set up in the transmit path */
1898 * e1000_clean_tx_ring - Free Tx Buffers
1899 * @adapter: board private structure
1900 * @tx_ring: ring to be cleaned
1903 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
1904 struct e1000_tx_ring
*tx_ring
)
1906 struct e1000_hw
*hw
= &adapter
->hw
;
1907 struct e1000_buffer
*buffer_info
;
1911 /* Free all the Tx ring sk_buffs */
1913 for (i
= 0; i
< tx_ring
->count
; i
++) {
1914 buffer_info
= &tx_ring
->buffer_info
[i
];
1915 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
1918 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
1919 memset(tx_ring
->buffer_info
, 0, size
);
1921 /* Zero out the descriptor ring */
1923 memset(tx_ring
->desc
, 0, tx_ring
->size
);
1925 tx_ring
->next_to_use
= 0;
1926 tx_ring
->next_to_clean
= 0;
1927 tx_ring
->last_tx_tso
= 0;
1929 writel(0, hw
->hw_addr
+ tx_ring
->tdh
);
1930 writel(0, hw
->hw_addr
+ tx_ring
->tdt
);
1934 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1935 * @adapter: board private structure
1938 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
)
1942 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1943 e1000_clean_tx_ring(adapter
, &adapter
->tx_ring
[i
]);
1947 * e1000_free_rx_resources - Free Rx Resources
1948 * @adapter: board private structure
1949 * @rx_ring: ring to clean the resources from
1951 * Free all receive software resources
1954 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
1955 struct e1000_rx_ring
*rx_ring
)
1957 struct pci_dev
*pdev
= adapter
->pdev
;
1959 e1000_clean_rx_ring(adapter
, rx_ring
);
1961 vfree(rx_ring
->buffer_info
);
1962 rx_ring
->buffer_info
= NULL
;
1964 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
1967 rx_ring
->desc
= NULL
;
1971 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1972 * @adapter: board private structure
1974 * Free all receive software resources
1977 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
)
1981 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
1982 e1000_free_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
1986 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1987 * @adapter: board private structure
1988 * @rx_ring: ring to free buffers from
1991 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
1992 struct e1000_rx_ring
*rx_ring
)
1994 struct e1000_hw
*hw
= &adapter
->hw
;
1995 struct e1000_buffer
*buffer_info
;
1996 struct pci_dev
*pdev
= adapter
->pdev
;
2000 /* Free all the Rx ring sk_buffs */
2001 for (i
= 0; i
< rx_ring
->count
; i
++) {
2002 buffer_info
= &rx_ring
->buffer_info
[i
];
2003 if (buffer_info
->dma
&&
2004 adapter
->clean_rx
== e1000_clean_rx_irq
) {
2005 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
2006 buffer_info
->length
,
2008 } else if (buffer_info
->dma
&&
2009 adapter
->clean_rx
== e1000_clean_jumbo_rx_irq
) {
2010 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
2011 buffer_info
->length
,
2015 buffer_info
->dma
= 0;
2016 if (buffer_info
->page
) {
2017 put_page(buffer_info
->page
);
2018 buffer_info
->page
= NULL
;
2020 if (buffer_info
->skb
) {
2021 dev_kfree_skb(buffer_info
->skb
);
2022 buffer_info
->skb
= NULL
;
2026 /* there also may be some cached data from a chained receive */
2027 if (rx_ring
->rx_skb_top
) {
2028 dev_kfree_skb(rx_ring
->rx_skb_top
);
2029 rx_ring
->rx_skb_top
= NULL
;
2032 size
= sizeof(struct e1000_buffer
) * rx_ring
->count
;
2033 memset(rx_ring
->buffer_info
, 0, size
);
2035 /* Zero out the descriptor ring */
2036 memset(rx_ring
->desc
, 0, rx_ring
->size
);
2038 rx_ring
->next_to_clean
= 0;
2039 rx_ring
->next_to_use
= 0;
2041 writel(0, hw
->hw_addr
+ rx_ring
->rdh
);
2042 writel(0, hw
->hw_addr
+ rx_ring
->rdt
);
2046 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2047 * @adapter: board private structure
2050 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
)
2054 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2055 e1000_clean_rx_ring(adapter
, &adapter
->rx_ring
[i
]);
2058 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2059 * and memory write and invalidate disabled for certain operations
2061 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
)
2063 struct e1000_hw
*hw
= &adapter
->hw
;
2064 struct net_device
*netdev
= adapter
->netdev
;
2067 e1000_pci_clear_mwi(hw
);
2070 rctl
|= E1000_RCTL_RST
;
2072 E1000_WRITE_FLUSH();
2075 if (netif_running(netdev
))
2076 e1000_clean_all_rx_rings(adapter
);
2079 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
)
2081 struct e1000_hw
*hw
= &adapter
->hw
;
2082 struct net_device
*netdev
= adapter
->netdev
;
2086 rctl
&= ~E1000_RCTL_RST
;
2088 E1000_WRITE_FLUSH();
2091 if (hw
->pci_cmd_word
& PCI_COMMAND_INVALIDATE
)
2092 e1000_pci_set_mwi(hw
);
2094 if (netif_running(netdev
)) {
2095 /* No need to loop, because 82542 supports only 1 queue */
2096 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[0];
2097 e1000_configure_rx(adapter
);
2098 adapter
->alloc_rx_buf(adapter
, ring
, E1000_DESC_UNUSED(ring
));
2103 * e1000_set_mac - Change the Ethernet Address of the NIC
2104 * @netdev: network interface device structure
2105 * @p: pointer to an address structure
2107 * Returns 0 on success, negative on failure
2110 static int e1000_set_mac(struct net_device
*netdev
, void *p
)
2112 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2113 struct e1000_hw
*hw
= &adapter
->hw
;
2114 struct sockaddr
*addr
= p
;
2116 if (!is_valid_ether_addr(addr
->sa_data
))
2117 return -EADDRNOTAVAIL
;
2119 /* 82542 2.0 needs to be in reset to write receive address registers */
2121 if (hw
->mac_type
== e1000_82542_rev2_0
)
2122 e1000_enter_82542_rst(adapter
);
2124 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
2125 memcpy(hw
->mac_addr
, addr
->sa_data
, netdev
->addr_len
);
2127 e1000_rar_set(hw
, hw
->mac_addr
, 0);
2129 if (hw
->mac_type
== e1000_82542_rev2_0
)
2130 e1000_leave_82542_rst(adapter
);
2136 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2137 * @netdev: network interface device structure
2139 * The set_rx_mode entry point is called whenever the unicast or multicast
2140 * address lists or the network interface flags are updated. This routine is
2141 * responsible for configuring the hardware for proper unicast, multicast,
2142 * promiscuous mode, and all-multi behavior.
2145 static void e1000_set_rx_mode(struct net_device
*netdev
)
2147 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2148 struct e1000_hw
*hw
= &adapter
->hw
;
2149 struct netdev_hw_addr
*ha
;
2150 bool use_uc
= false;
2153 int i
, rar_entries
= E1000_RAR_ENTRIES
;
2154 int mta_reg_count
= E1000_NUM_MTA_REGISTERS
;
2155 u32
*mcarray
= kcalloc(mta_reg_count
, sizeof(u32
), GFP_ATOMIC
);
2158 e_err(probe
, "memory allocation failed\n");
2162 /* Check for Promiscuous and All Multicast modes */
2166 if (netdev
->flags
& IFF_PROMISC
) {
2167 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2168 rctl
&= ~E1000_RCTL_VFE
;
2170 if (netdev
->flags
& IFF_ALLMULTI
)
2171 rctl
|= E1000_RCTL_MPE
;
2173 rctl
&= ~E1000_RCTL_MPE
;
2174 /* Enable VLAN filter if there is a VLAN */
2176 rctl
|= E1000_RCTL_VFE
;
2179 if (netdev_uc_count(netdev
) > rar_entries
- 1) {
2180 rctl
|= E1000_RCTL_UPE
;
2181 } else if (!(netdev
->flags
& IFF_PROMISC
)) {
2182 rctl
&= ~E1000_RCTL_UPE
;
2188 /* 82542 2.0 needs to be in reset to write receive address registers */
2190 if (hw
->mac_type
== e1000_82542_rev2_0
)
2191 e1000_enter_82542_rst(adapter
);
2193 /* load the first 14 addresses into the exact filters 1-14. Unicast
2194 * addresses take precedence to avoid disabling unicast filtering
2197 * RAR 0 is used for the station MAC adddress
2198 * if there are not 14 addresses, go ahead and clear the filters
2202 netdev_for_each_uc_addr(ha
, netdev
) {
2203 if (i
== rar_entries
)
2205 e1000_rar_set(hw
, ha
->addr
, i
++);
2208 netdev_for_each_mc_addr(ha
, netdev
) {
2209 if (i
== rar_entries
) {
2210 /* load any remaining addresses into the hash table */
2211 u32 hash_reg
, hash_bit
, mta
;
2212 hash_value
= e1000_hash_mc_addr(hw
, ha
->addr
);
2213 hash_reg
= (hash_value
>> 5) & 0x7F;
2214 hash_bit
= hash_value
& 0x1F;
2215 mta
= (1 << hash_bit
);
2216 mcarray
[hash_reg
] |= mta
;
2218 e1000_rar_set(hw
, ha
->addr
, i
++);
2222 for (; i
< rar_entries
; i
++) {
2223 E1000_WRITE_REG_ARRAY(hw
, RA
, i
<< 1, 0);
2224 E1000_WRITE_FLUSH();
2225 E1000_WRITE_REG_ARRAY(hw
, RA
, (i
<< 1) + 1, 0);
2226 E1000_WRITE_FLUSH();
2229 /* write the hash table completely, write from bottom to avoid
2230 * both stupid write combining chipsets, and flushing each write */
2231 for (i
= mta_reg_count
- 1; i
>= 0 ; i
--) {
2233 * If we are on an 82544 has an errata where writing odd
2234 * offsets overwrites the previous even offset, but writing
2235 * backwards over the range solves the issue by always
2236 * writing the odd offset first
2238 E1000_WRITE_REG_ARRAY(hw
, MTA
, i
, mcarray
[i
]);
2240 E1000_WRITE_FLUSH();
2242 if (hw
->mac_type
== e1000_82542_rev2_0
)
2243 e1000_leave_82542_rst(adapter
);
2248 /* Need to wait a few seconds after link up to get diagnostic information from
2251 static void e1000_update_phy_info(unsigned long data
)
2253 struct e1000_adapter
*adapter
= (struct e1000_adapter
*)data
;
2254 schedule_work(&adapter
->phy_info_task
);
2257 static void e1000_update_phy_info_task(struct work_struct
*work
)
2259 struct e1000_adapter
*adapter
= container_of(work
,
2260 struct e1000_adapter
,
2262 struct e1000_hw
*hw
= &adapter
->hw
;
2265 e1000_phy_get_info(hw
, &adapter
->phy_info
);
2270 * e1000_82547_tx_fifo_stall - Timer Call-back
2271 * @data: pointer to adapter cast into an unsigned long
2273 static void e1000_82547_tx_fifo_stall(unsigned long data
)
2275 struct e1000_adapter
*adapter
= (struct e1000_adapter
*)data
;
2276 schedule_work(&adapter
->fifo_stall_task
);
2280 * e1000_82547_tx_fifo_stall_task - task to complete work
2281 * @work: work struct contained inside adapter struct
2283 static void e1000_82547_tx_fifo_stall_task(struct work_struct
*work
)
2285 struct e1000_adapter
*adapter
= container_of(work
,
2286 struct e1000_adapter
,
2288 struct e1000_hw
*hw
= &adapter
->hw
;
2289 struct net_device
*netdev
= adapter
->netdev
;
2293 if (atomic_read(&adapter
->tx_fifo_stall
)) {
2294 if ((er32(TDT
) == er32(TDH
)) &&
2295 (er32(TDFT
) == er32(TDFH
)) &&
2296 (er32(TDFTS
) == er32(TDFHS
))) {
2298 ew32(TCTL
, tctl
& ~E1000_TCTL_EN
);
2299 ew32(TDFT
, adapter
->tx_head_addr
);
2300 ew32(TDFH
, adapter
->tx_head_addr
);
2301 ew32(TDFTS
, adapter
->tx_head_addr
);
2302 ew32(TDFHS
, adapter
->tx_head_addr
);
2304 E1000_WRITE_FLUSH();
2306 adapter
->tx_fifo_head
= 0;
2307 atomic_set(&adapter
->tx_fifo_stall
, 0);
2308 netif_wake_queue(netdev
);
2309 } else if (!test_bit(__E1000_DOWN
, &adapter
->flags
)) {
2310 mod_timer(&adapter
->tx_fifo_stall_timer
, jiffies
+ 1);
2316 bool e1000_has_link(struct e1000_adapter
*adapter
)
2318 struct e1000_hw
*hw
= &adapter
->hw
;
2319 bool link_active
= false;
2321 /* get_link_status is set on LSC (link status) interrupt or
2322 * rx sequence error interrupt. get_link_status will stay
2323 * false until the e1000_check_for_link establishes link
2324 * for copper adapters ONLY
2326 switch (hw
->media_type
) {
2327 case e1000_media_type_copper
:
2328 if (hw
->get_link_status
) {
2329 e1000_check_for_link(hw
);
2330 link_active
= !hw
->get_link_status
;
2335 case e1000_media_type_fiber
:
2336 e1000_check_for_link(hw
);
2337 link_active
= !!(er32(STATUS
) & E1000_STATUS_LU
);
2339 case e1000_media_type_internal_serdes
:
2340 e1000_check_for_link(hw
);
2341 link_active
= hw
->serdes_has_link
;
2351 * e1000_watchdog - Timer Call-back
2352 * @data: pointer to adapter cast into an unsigned long
2354 static void e1000_watchdog(unsigned long data
)
2356 struct e1000_adapter
*adapter
= (struct e1000_adapter
*)data
;
2357 struct e1000_hw
*hw
= &adapter
->hw
;
2358 struct net_device
*netdev
= adapter
->netdev
;
2359 struct e1000_tx_ring
*txdr
= adapter
->tx_ring
;
2362 link
= e1000_has_link(adapter
);
2363 if ((netif_carrier_ok(netdev
)) && link
)
2367 if (!netif_carrier_ok(netdev
)) {
2370 /* update snapshot of PHY registers on LSC */
2371 e1000_get_speed_and_duplex(hw
,
2372 &adapter
->link_speed
,
2373 &adapter
->link_duplex
);
2376 pr_info("%s NIC Link is Up %d Mbps %s, "
2377 "Flow Control: %s\n",
2379 adapter
->link_speed
,
2380 adapter
->link_duplex
== FULL_DUPLEX
?
2381 "Full Duplex" : "Half Duplex",
2382 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
&
2383 E1000_CTRL_RFCE
)) ? "RX/TX" : ((ctrl
&
2384 E1000_CTRL_RFCE
) ? "RX" : ((ctrl
&
2385 E1000_CTRL_TFCE
) ? "TX" : "None")));
2387 /* adjust timeout factor according to speed/duplex */
2388 adapter
->tx_timeout_factor
= 1;
2389 switch (adapter
->link_speed
) {
2392 adapter
->tx_timeout_factor
= 16;
2396 /* maybe add some timeout factor ? */
2400 /* enable transmits in the hardware */
2402 tctl
|= E1000_TCTL_EN
;
2405 netif_carrier_on(netdev
);
2406 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2407 mod_timer(&adapter
->phy_info_timer
,
2408 round_jiffies(jiffies
+ 2 * HZ
));
2409 adapter
->smartspeed
= 0;
2412 if (netif_carrier_ok(netdev
)) {
2413 adapter
->link_speed
= 0;
2414 adapter
->link_duplex
= 0;
2415 pr_info("%s NIC Link is Down\n",
2417 netif_carrier_off(netdev
);
2419 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2420 mod_timer(&adapter
->phy_info_timer
,
2421 round_jiffies(jiffies
+ 2 * HZ
));
2424 e1000_smartspeed(adapter
);
2428 e1000_update_stats(adapter
);
2430 hw
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
2431 adapter
->tpt_old
= adapter
->stats
.tpt
;
2432 hw
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
2433 adapter
->colc_old
= adapter
->stats
.colc
;
2435 adapter
->gorcl
= adapter
->stats
.gorcl
- adapter
->gorcl_old
;
2436 adapter
->gorcl_old
= adapter
->stats
.gorcl
;
2437 adapter
->gotcl
= adapter
->stats
.gotcl
- adapter
->gotcl_old
;
2438 adapter
->gotcl_old
= adapter
->stats
.gotcl
;
2440 e1000_update_adaptive(hw
);
2442 if (!netif_carrier_ok(netdev
)) {
2443 if (E1000_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
2444 /* We've lost link, so the controller stops DMA,
2445 * but we've got queued Tx work that's never going
2446 * to get done, so reset controller to flush Tx.
2447 * (Do the reset outside of interrupt context). */
2448 adapter
->tx_timeout_count
++;
2449 schedule_work(&adapter
->reset_task
);
2450 /* return immediately since reset is imminent */
2455 /* Simple mode for Interrupt Throttle Rate (ITR) */
2456 if (hw
->mac_type
>= e1000_82540
&& adapter
->itr_setting
== 4) {
2458 * Symmetric Tx/Rx gets a reduced ITR=2000;
2459 * Total asymmetrical Tx or Rx gets ITR=8000;
2460 * everyone else is between 2000-8000.
2462 u32 goc
= (adapter
->gotcl
+ adapter
->gorcl
) / 10000;
2463 u32 dif
= (adapter
->gotcl
> adapter
->gorcl
?
2464 adapter
->gotcl
- adapter
->gorcl
:
2465 adapter
->gorcl
- adapter
->gotcl
) / 10000;
2466 u32 itr
= goc
> 0 ? (dif
* 6000 / goc
+ 2000) : 8000;
2468 ew32(ITR
, 1000000000 / (itr
* 256));
2471 /* Cause software interrupt to ensure rx ring is cleaned */
2472 ew32(ICS
, E1000_ICS_RXDMT0
);
2474 /* Force detection of hung controller every watchdog period */
2475 adapter
->detect_tx_hung
= true;
2477 /* Reset the timer */
2478 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2479 mod_timer(&adapter
->watchdog_timer
,
2480 round_jiffies(jiffies
+ 2 * HZ
));
2483 enum latency_range
{
2487 latency_invalid
= 255
2491 * e1000_update_itr - update the dynamic ITR value based on statistics
2492 * @adapter: pointer to adapter
2493 * @itr_setting: current adapter->itr
2494 * @packets: the number of packets during this measurement interval
2495 * @bytes: the number of bytes during this measurement interval
2497 * Stores a new ITR value based on packets and byte
2498 * counts during the last interrupt. The advantage of per interrupt
2499 * computation is faster updates and more accurate ITR for the current
2500 * traffic pattern. Constants in this function were computed
2501 * based on theoretical maximum wire speed and thresholds were set based
2502 * on testing data as well as attempting to minimize response time
2503 * while increasing bulk throughput.
2504 * this functionality is controlled by the InterruptThrottleRate module
2505 * parameter (see e1000_param.c)
2507 static unsigned int e1000_update_itr(struct e1000_adapter
*adapter
,
2508 u16 itr_setting
, int packets
, int bytes
)
2510 unsigned int retval
= itr_setting
;
2511 struct e1000_hw
*hw
= &adapter
->hw
;
2513 if (unlikely(hw
->mac_type
< e1000_82540
))
2514 goto update_itr_done
;
2517 goto update_itr_done
;
2519 switch (itr_setting
) {
2520 case lowest_latency
:
2521 /* jumbo frames get bulk treatment*/
2522 if (bytes
/packets
> 8000)
2523 retval
= bulk_latency
;
2524 else if ((packets
< 5) && (bytes
> 512))
2525 retval
= low_latency
;
2527 case low_latency
: /* 50 usec aka 20000 ints/s */
2528 if (bytes
> 10000) {
2529 /* jumbo frames need bulk latency setting */
2530 if (bytes
/packets
> 8000)
2531 retval
= bulk_latency
;
2532 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
2533 retval
= bulk_latency
;
2534 else if ((packets
> 35))
2535 retval
= lowest_latency
;
2536 } else if (bytes
/packets
> 2000)
2537 retval
= bulk_latency
;
2538 else if (packets
<= 2 && bytes
< 512)
2539 retval
= lowest_latency
;
2541 case bulk_latency
: /* 250 usec aka 4000 ints/s */
2542 if (bytes
> 25000) {
2544 retval
= low_latency
;
2545 } else if (bytes
< 6000) {
2546 retval
= low_latency
;
2555 static void e1000_set_itr(struct e1000_adapter
*adapter
)
2557 struct e1000_hw
*hw
= &adapter
->hw
;
2559 u32 new_itr
= adapter
->itr
;
2561 if (unlikely(hw
->mac_type
< e1000_82540
))
2564 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2565 if (unlikely(adapter
->link_speed
!= SPEED_1000
)) {
2571 adapter
->tx_itr
= e1000_update_itr(adapter
,
2573 adapter
->total_tx_packets
,
2574 adapter
->total_tx_bytes
);
2575 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2576 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
2577 adapter
->tx_itr
= low_latency
;
2579 adapter
->rx_itr
= e1000_update_itr(adapter
,
2581 adapter
->total_rx_packets
,
2582 adapter
->total_rx_bytes
);
2583 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2584 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
2585 adapter
->rx_itr
= low_latency
;
2587 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
2589 switch (current_itr
) {
2590 /* counts and packets in update_itr are dependent on these numbers */
2591 case lowest_latency
:
2595 new_itr
= 20000; /* aka hwitr = ~200 */
2605 if (new_itr
!= adapter
->itr
) {
2606 /* this attempts to bias the interrupt rate towards Bulk
2607 * by adding intermediate steps when interrupt rate is
2609 new_itr
= new_itr
> adapter
->itr
?
2610 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
2612 adapter
->itr
= new_itr
;
2613 ew32(ITR
, 1000000000 / (new_itr
* 256));
2617 #define E1000_TX_FLAGS_CSUM 0x00000001
2618 #define E1000_TX_FLAGS_VLAN 0x00000002
2619 #define E1000_TX_FLAGS_TSO 0x00000004
2620 #define E1000_TX_FLAGS_IPV4 0x00000008
2621 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2622 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2624 static int e1000_tso(struct e1000_adapter
*adapter
,
2625 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2627 struct e1000_context_desc
*context_desc
;
2628 struct e1000_buffer
*buffer_info
;
2631 u16 ipcse
= 0, tucse
, mss
;
2632 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
2635 if (skb_is_gso(skb
)) {
2636 if (skb_header_cloned(skb
)) {
2637 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
2642 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
2643 mss
= skb_shinfo(skb
)->gso_size
;
2644 if (skb
->protocol
== htons(ETH_P_IP
)) {
2645 struct iphdr
*iph
= ip_hdr(skb
);
2648 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
2652 cmd_length
= E1000_TXD_CMD_IP
;
2653 ipcse
= skb_transport_offset(skb
) - 1;
2654 } else if (skb
->protocol
== htons(ETH_P_IPV6
)) {
2655 ipv6_hdr(skb
)->payload_len
= 0;
2656 tcp_hdr(skb
)->check
=
2657 ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
2658 &ipv6_hdr(skb
)->daddr
,
2662 ipcss
= skb_network_offset(skb
);
2663 ipcso
= (void *)&(ip_hdr(skb
)->check
) - (void *)skb
->data
;
2664 tucss
= skb_transport_offset(skb
);
2665 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
2668 cmd_length
|= (E1000_TXD_CMD_DEXT
| E1000_TXD_CMD_TSE
|
2669 E1000_TXD_CMD_TCP
| (skb
->len
- (hdr_len
)));
2671 i
= tx_ring
->next_to_use
;
2672 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2673 buffer_info
= &tx_ring
->buffer_info
[i
];
2675 context_desc
->lower_setup
.ip_fields
.ipcss
= ipcss
;
2676 context_desc
->lower_setup
.ip_fields
.ipcso
= ipcso
;
2677 context_desc
->lower_setup
.ip_fields
.ipcse
= cpu_to_le16(ipcse
);
2678 context_desc
->upper_setup
.tcp_fields
.tucss
= tucss
;
2679 context_desc
->upper_setup
.tcp_fields
.tucso
= tucso
;
2680 context_desc
->upper_setup
.tcp_fields
.tucse
= cpu_to_le16(tucse
);
2681 context_desc
->tcp_seg_setup
.fields
.mss
= cpu_to_le16(mss
);
2682 context_desc
->tcp_seg_setup
.fields
.hdr_len
= hdr_len
;
2683 context_desc
->cmd_and_length
= cpu_to_le32(cmd_length
);
2685 buffer_info
->time_stamp
= jiffies
;
2686 buffer_info
->next_to_watch
= i
;
2688 if (++i
== tx_ring
->count
) i
= 0;
2689 tx_ring
->next_to_use
= i
;
2696 static bool e1000_tx_csum(struct e1000_adapter
*adapter
,
2697 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2699 struct e1000_context_desc
*context_desc
;
2700 struct e1000_buffer
*buffer_info
;
2703 u32 cmd_len
= E1000_TXD_CMD_DEXT
;
2705 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
2708 switch (skb
->protocol
) {
2709 case cpu_to_be16(ETH_P_IP
):
2710 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2711 cmd_len
|= E1000_TXD_CMD_TCP
;
2713 case cpu_to_be16(ETH_P_IPV6
):
2714 /* XXX not handling all IPV6 headers */
2715 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2716 cmd_len
|= E1000_TXD_CMD_TCP
;
2719 if (unlikely(net_ratelimit()))
2720 e_warn(drv
, "checksum_partial proto=%x!\n",
2725 css
= skb_transport_offset(skb
);
2727 i
= tx_ring
->next_to_use
;
2728 buffer_info
= &tx_ring
->buffer_info
[i
];
2729 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2731 context_desc
->lower_setup
.ip_config
= 0;
2732 context_desc
->upper_setup
.tcp_fields
.tucss
= css
;
2733 context_desc
->upper_setup
.tcp_fields
.tucso
=
2734 css
+ skb
->csum_offset
;
2735 context_desc
->upper_setup
.tcp_fields
.tucse
= 0;
2736 context_desc
->tcp_seg_setup
.data
= 0;
2737 context_desc
->cmd_and_length
= cpu_to_le32(cmd_len
);
2739 buffer_info
->time_stamp
= jiffies
;
2740 buffer_info
->next_to_watch
= i
;
2742 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
2743 tx_ring
->next_to_use
= i
;
2748 #define E1000_MAX_TXD_PWR 12
2749 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2751 static int e1000_tx_map(struct e1000_adapter
*adapter
,
2752 struct e1000_tx_ring
*tx_ring
,
2753 struct sk_buff
*skb
, unsigned int first
,
2754 unsigned int max_per_txd
, unsigned int nr_frags
,
2757 struct e1000_hw
*hw
= &adapter
->hw
;
2758 struct pci_dev
*pdev
= adapter
->pdev
;
2759 struct e1000_buffer
*buffer_info
;
2760 unsigned int len
= skb_headlen(skb
);
2761 unsigned int offset
= 0, size
, count
= 0, i
;
2764 i
= tx_ring
->next_to_use
;
2767 buffer_info
= &tx_ring
->buffer_info
[i
];
2768 size
= min(len
, max_per_txd
);
2769 /* Workaround for Controller erratum --
2770 * descriptor for non-tso packet in a linear SKB that follows a
2771 * tso gets written back prematurely before the data is fully
2772 * DMA'd to the controller */
2773 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&&
2775 tx_ring
->last_tx_tso
= 0;
2779 /* Workaround for premature desc write-backs
2780 * in TSO mode. Append 4-byte sentinel desc */
2781 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
2783 /* work-around for errata 10 and it applies
2784 * to all controllers in PCI-X mode
2785 * The fix is to make sure that the first descriptor of a
2786 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2788 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
2789 (size
> 2015) && count
== 0))
2792 /* Workaround for potential 82544 hang in PCI-X. Avoid
2793 * terminating buffers within evenly-aligned dwords. */
2794 if (unlikely(adapter
->pcix_82544
&&
2795 !((unsigned long)(skb
->data
+ offset
+ size
- 1) & 4) &&
2799 buffer_info
->length
= size
;
2800 /* set time_stamp *before* dma to help avoid a possible race */
2801 buffer_info
->time_stamp
= jiffies
;
2802 buffer_info
->mapped_as_page
= false;
2803 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
2805 size
, DMA_TO_DEVICE
);
2806 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2808 buffer_info
->next_to_watch
= i
;
2815 if (unlikely(i
== tx_ring
->count
))
2820 for (f
= 0; f
< nr_frags
; f
++) {
2821 struct skb_frag_struct
*frag
;
2823 frag
= &skb_shinfo(skb
)->frags
[f
];
2825 offset
= frag
->page_offset
;
2829 if (unlikely(i
== tx_ring
->count
))
2832 buffer_info
= &tx_ring
->buffer_info
[i
];
2833 size
= min(len
, max_per_txd
);
2834 /* Workaround for premature desc write-backs
2835 * in TSO mode. Append 4-byte sentinel desc */
2836 if (unlikely(mss
&& f
== (nr_frags
-1) && size
== len
&& size
> 8))
2838 /* Workaround for potential 82544 hang in PCI-X.
2839 * Avoid terminating buffers within evenly-aligned
2841 if (unlikely(adapter
->pcix_82544
&&
2842 !((unsigned long)(page_to_phys(frag
->page
) + offset
2847 buffer_info
->length
= size
;
2848 buffer_info
->time_stamp
= jiffies
;
2849 buffer_info
->mapped_as_page
= true;
2850 buffer_info
->dma
= dma_map_page(&pdev
->dev
, frag
->page
,
2853 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2855 buffer_info
->next_to_watch
= i
;
2863 tx_ring
->buffer_info
[i
].skb
= skb
;
2864 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2869 dev_err(&pdev
->dev
, "TX DMA map failed\n");
2870 buffer_info
->dma
= 0;
2876 i
+= tx_ring
->count
;
2878 buffer_info
= &tx_ring
->buffer_info
[i
];
2879 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
2885 static void e1000_tx_queue(struct e1000_adapter
*adapter
,
2886 struct e1000_tx_ring
*tx_ring
, int tx_flags
,
2889 struct e1000_hw
*hw
= &adapter
->hw
;
2890 struct e1000_tx_desc
*tx_desc
= NULL
;
2891 struct e1000_buffer
*buffer_info
;
2892 u32 txd_upper
= 0, txd_lower
= E1000_TXD_CMD_IFCS
;
2895 if (likely(tx_flags
& E1000_TX_FLAGS_TSO
)) {
2896 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
|
2898 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
2900 if (likely(tx_flags
& E1000_TX_FLAGS_IPV4
))
2901 txd_upper
|= E1000_TXD_POPTS_IXSM
<< 8;
2904 if (likely(tx_flags
& E1000_TX_FLAGS_CSUM
)) {
2905 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
;
2906 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
2909 if (unlikely(tx_flags
& E1000_TX_FLAGS_VLAN
)) {
2910 txd_lower
|= E1000_TXD_CMD_VLE
;
2911 txd_upper
|= (tx_flags
& E1000_TX_FLAGS_VLAN_MASK
);
2914 i
= tx_ring
->next_to_use
;
2917 buffer_info
= &tx_ring
->buffer_info
[i
];
2918 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
2919 tx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
2920 tx_desc
->lower
.data
=
2921 cpu_to_le32(txd_lower
| buffer_info
->length
);
2922 tx_desc
->upper
.data
= cpu_to_le32(txd_upper
);
2923 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
2926 tx_desc
->lower
.data
|= cpu_to_le32(adapter
->txd_cmd
);
2928 /* Force memory writes to complete before letting h/w
2929 * know there are new descriptors to fetch. (Only
2930 * applicable for weak-ordered memory model archs,
2931 * such as IA-64). */
2934 tx_ring
->next_to_use
= i
;
2935 writel(i
, hw
->hw_addr
+ tx_ring
->tdt
);
2936 /* we need this if more than one processor can write to our tail
2937 * at a time, it syncronizes IO on IA64/Altix systems */
2942 * 82547 workaround to avoid controller hang in half-duplex environment.
2943 * The workaround is to avoid queuing a large packet that would span
2944 * the internal Tx FIFO ring boundary by notifying the stack to resend
2945 * the packet at a later time. This gives the Tx FIFO an opportunity to
2946 * flush all packets. When that occurs, we reset the Tx FIFO pointers
2947 * to the beginning of the Tx FIFO.
2950 #define E1000_FIFO_HDR 0x10
2951 #define E1000_82547_PAD_LEN 0x3E0
2953 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
2954 struct sk_buff
*skb
)
2956 u32 fifo_space
= adapter
->tx_fifo_size
- adapter
->tx_fifo_head
;
2957 u32 skb_fifo_len
= skb
->len
+ E1000_FIFO_HDR
;
2959 skb_fifo_len
= ALIGN(skb_fifo_len
, E1000_FIFO_HDR
);
2961 if (adapter
->link_duplex
!= HALF_DUPLEX
)
2962 goto no_fifo_stall_required
;
2964 if (atomic_read(&adapter
->tx_fifo_stall
))
2967 if (skb_fifo_len
>= (E1000_82547_PAD_LEN
+ fifo_space
)) {
2968 atomic_set(&adapter
->tx_fifo_stall
, 1);
2972 no_fifo_stall_required
:
2973 adapter
->tx_fifo_head
+= skb_fifo_len
;
2974 if (adapter
->tx_fifo_head
>= adapter
->tx_fifo_size
)
2975 adapter
->tx_fifo_head
-= adapter
->tx_fifo_size
;
2979 static int __e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
2981 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2982 struct e1000_tx_ring
*tx_ring
= adapter
->tx_ring
;
2984 netif_stop_queue(netdev
);
2985 /* Herbert's original patch had:
2986 * smp_mb__after_netif_stop_queue();
2987 * but since that doesn't exist yet, just open code it. */
2990 /* We need to check again in a case another CPU has just
2991 * made room available. */
2992 if (likely(E1000_DESC_UNUSED(tx_ring
) < size
))
2996 netif_start_queue(netdev
);
2997 ++adapter
->restart_queue
;
3001 static int e1000_maybe_stop_tx(struct net_device
*netdev
,
3002 struct e1000_tx_ring
*tx_ring
, int size
)
3004 if (likely(E1000_DESC_UNUSED(tx_ring
) >= size
))
3006 return __e1000_maybe_stop_tx(netdev
, size
);
3009 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3010 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
3011 struct net_device
*netdev
)
3013 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3014 struct e1000_hw
*hw
= &adapter
->hw
;
3015 struct e1000_tx_ring
*tx_ring
;
3016 unsigned int first
, max_per_txd
= E1000_MAX_DATA_PER_TXD
;
3017 unsigned int max_txd_pwr
= E1000_MAX_TXD_PWR
;
3018 unsigned int tx_flags
= 0;
3019 unsigned int len
= skb_headlen(skb
);
3020 unsigned int nr_frags
;
3026 /* This goes back to the question of how to logically map a tx queue
3027 * to a flow. Right now, performance is impacted slightly negatively
3028 * if using multiple tx queues. If the stack breaks away from a
3029 * single qdisc implementation, we can look at this again. */
3030 tx_ring
= adapter
->tx_ring
;
3032 if (unlikely(skb
->len
<= 0)) {
3033 dev_kfree_skb_any(skb
);
3034 return NETDEV_TX_OK
;
3037 mss
= skb_shinfo(skb
)->gso_size
;
3038 /* The controller does a simple calculation to
3039 * make sure there is enough room in the FIFO before
3040 * initiating the DMA for each buffer. The calc is:
3041 * 4 = ceil(buffer len/mss). To make sure we don't
3042 * overrun the FIFO, adjust the max buffer len if mss
3046 max_per_txd
= min(mss
<< 2, max_per_txd
);
3047 max_txd_pwr
= fls(max_per_txd
) - 1;
3049 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
3050 if (skb
->data_len
&& hdr_len
== len
) {
3051 switch (hw
->mac_type
) {
3052 unsigned int pull_size
;
3054 /* Make sure we have room to chop off 4 bytes,
3055 * and that the end alignment will work out to
3056 * this hardware's requirements
3057 * NOTE: this is a TSO only workaround
3058 * if end byte alignment not correct move us
3059 * into the next dword */
3060 if ((unsigned long)(skb_tail_pointer(skb
) - 1) & 4)
3063 pull_size
= min((unsigned int)4, skb
->data_len
);
3064 if (!__pskb_pull_tail(skb
, pull_size
)) {
3065 e_err(drv
, "__pskb_pull_tail "
3067 dev_kfree_skb_any(skb
);
3068 return NETDEV_TX_OK
;
3070 len
= skb_headlen(skb
);
3079 /* reserve a descriptor for the offload context */
3080 if ((mss
) || (skb
->ip_summed
== CHECKSUM_PARTIAL
))
3084 /* Controller Erratum workaround */
3085 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&& !skb_is_gso(skb
))
3088 count
+= TXD_USE_COUNT(len
, max_txd_pwr
);
3090 if (adapter
->pcix_82544
)
3093 /* work-around for errata 10 and it applies to all controllers
3094 * in PCI-X mode, so add one more descriptor to the count
3096 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
3100 nr_frags
= skb_shinfo(skb
)->nr_frags
;
3101 for (f
= 0; f
< nr_frags
; f
++)
3102 count
+= TXD_USE_COUNT(skb_shinfo(skb
)->frags
[f
].size
,
3104 if (adapter
->pcix_82544
)
3107 /* need: count + 2 desc gap to keep tail from touching
3108 * head, otherwise try next time */
3109 if (unlikely(e1000_maybe_stop_tx(netdev
, tx_ring
, count
+ 2)))
3110 return NETDEV_TX_BUSY
;
3112 if (unlikely(hw
->mac_type
== e1000_82547
)) {
3113 if (unlikely(e1000_82547_fifo_workaround(adapter
, skb
))) {
3114 netif_stop_queue(netdev
);
3115 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3116 mod_timer(&adapter
->tx_fifo_stall_timer
,
3118 return NETDEV_TX_BUSY
;
3122 if (unlikely(vlan_tx_tag_present(skb
))) {
3123 tx_flags
|= E1000_TX_FLAGS_VLAN
;
3124 tx_flags
|= (vlan_tx_tag_get(skb
) << E1000_TX_FLAGS_VLAN_SHIFT
);
3127 first
= tx_ring
->next_to_use
;
3129 tso
= e1000_tso(adapter
, tx_ring
, skb
);
3131 dev_kfree_skb_any(skb
);
3132 return NETDEV_TX_OK
;
3136 if (likely(hw
->mac_type
!= e1000_82544
))
3137 tx_ring
->last_tx_tso
= 1;
3138 tx_flags
|= E1000_TX_FLAGS_TSO
;
3139 } else if (likely(e1000_tx_csum(adapter
, tx_ring
, skb
)))
3140 tx_flags
|= E1000_TX_FLAGS_CSUM
;
3142 if (likely(skb
->protocol
== htons(ETH_P_IP
)))
3143 tx_flags
|= E1000_TX_FLAGS_IPV4
;
3145 count
= e1000_tx_map(adapter
, tx_ring
, skb
, first
, max_per_txd
,
3149 e1000_tx_queue(adapter
, tx_ring
, tx_flags
, count
);
3150 /* Make sure there is space in the ring for the next send. */
3151 e1000_maybe_stop_tx(netdev
, tx_ring
, MAX_SKB_FRAGS
+ 2);
3154 dev_kfree_skb_any(skb
);
3155 tx_ring
->buffer_info
[first
].time_stamp
= 0;
3156 tx_ring
->next_to_use
= first
;
3159 return NETDEV_TX_OK
;
3163 * e1000_tx_timeout - Respond to a Tx Hang
3164 * @netdev: network interface device structure
3167 static void e1000_tx_timeout(struct net_device
*netdev
)
3169 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3171 /* Do the reset outside of interrupt context */
3172 adapter
->tx_timeout_count
++;
3173 schedule_work(&adapter
->reset_task
);
3176 static void e1000_reset_task(struct work_struct
*work
)
3178 struct e1000_adapter
*adapter
=
3179 container_of(work
, struct e1000_adapter
, reset_task
);
3181 e1000_reinit_safe(adapter
);
3185 * e1000_get_stats - Get System Network Statistics
3186 * @netdev: network interface device structure
3188 * Returns the address of the device statistics structure.
3189 * The statistics are actually updated from the timer callback.
3192 static struct net_device_stats
*e1000_get_stats(struct net_device
*netdev
)
3194 /* only return the current stats */
3195 return &netdev
->stats
;
3199 * e1000_change_mtu - Change the Maximum Transfer Unit
3200 * @netdev: network interface device structure
3201 * @new_mtu: new value for maximum frame size
3203 * Returns 0 on success, negative on failure
3206 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
)
3208 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3209 struct e1000_hw
*hw
= &adapter
->hw
;
3210 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
3212 if ((max_frame
< MINIMUM_ETHERNET_FRAME_SIZE
) ||
3213 (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
3214 e_err(probe
, "Invalid MTU setting\n");
3218 /* Adapter-specific max frame size limits. */
3219 switch (hw
->mac_type
) {
3220 case e1000_undefined
... e1000_82542_rev2_1
:
3221 if (max_frame
> (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) {
3222 e_err(probe
, "Jumbo Frames not supported.\n");
3227 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3231 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
3233 /* e1000_down has a dependency on max_frame_size */
3234 hw
->max_frame_size
= max_frame
;
3235 if (netif_running(netdev
))
3236 e1000_down(adapter
);
3238 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3239 * means we reserve 2 more, this pushes us to allocate from the next
3241 * i.e. RXBUFFER_2048 --> size-4096 slab
3242 * however with the new *_jumbo_rx* routines, jumbo receives will use
3243 * fragmented skbs */
3245 if (max_frame
<= E1000_RXBUFFER_2048
)
3246 adapter
->rx_buffer_len
= E1000_RXBUFFER_2048
;
3248 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3249 adapter
->rx_buffer_len
= E1000_RXBUFFER_16384
;
3250 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3251 adapter
->rx_buffer_len
= PAGE_SIZE
;
3254 /* adjust allocation if LPE protects us, and we aren't using SBP */
3255 if (!hw
->tbi_compatibility_on
&&
3256 ((max_frame
== (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) ||
3257 (max_frame
== MAXIMUM_ETHERNET_VLAN_SIZE
)))
3258 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3260 pr_info("%s changing MTU from %d to %d\n",
3261 netdev
->name
, netdev
->mtu
, new_mtu
);
3262 netdev
->mtu
= new_mtu
;
3264 if (netif_running(netdev
))
3267 e1000_reset(adapter
);
3269 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
3275 * e1000_update_stats - Update the board statistics counters
3276 * @adapter: board private structure
3279 void e1000_update_stats(struct e1000_adapter
*adapter
)
3281 struct net_device
*netdev
= adapter
->netdev
;
3282 struct e1000_hw
*hw
= &adapter
->hw
;
3283 struct pci_dev
*pdev
= adapter
->pdev
;
3284 unsigned long flags
;
3287 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3290 * Prevent stats update while adapter is being reset, or if the pci
3291 * connection is down.
3293 if (adapter
->link_speed
== 0)
3295 if (pci_channel_offline(pdev
))
3298 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
3300 /* these counters are modified from e1000_tbi_adjust_stats,
3301 * called from the interrupt context, so they must only
3302 * be written while holding adapter->stats_lock
3305 adapter
->stats
.crcerrs
+= er32(CRCERRS
);
3306 adapter
->stats
.gprc
+= er32(GPRC
);
3307 adapter
->stats
.gorcl
+= er32(GORCL
);
3308 adapter
->stats
.gorch
+= er32(GORCH
);
3309 adapter
->stats
.bprc
+= er32(BPRC
);
3310 adapter
->stats
.mprc
+= er32(MPRC
);
3311 adapter
->stats
.roc
+= er32(ROC
);
3313 adapter
->stats
.prc64
+= er32(PRC64
);
3314 adapter
->stats
.prc127
+= er32(PRC127
);
3315 adapter
->stats
.prc255
+= er32(PRC255
);
3316 adapter
->stats
.prc511
+= er32(PRC511
);
3317 adapter
->stats
.prc1023
+= er32(PRC1023
);
3318 adapter
->stats
.prc1522
+= er32(PRC1522
);
3320 adapter
->stats
.symerrs
+= er32(SYMERRS
);
3321 adapter
->stats
.mpc
+= er32(MPC
);
3322 adapter
->stats
.scc
+= er32(SCC
);
3323 adapter
->stats
.ecol
+= er32(ECOL
);
3324 adapter
->stats
.mcc
+= er32(MCC
);
3325 adapter
->stats
.latecol
+= er32(LATECOL
);
3326 adapter
->stats
.dc
+= er32(DC
);
3327 adapter
->stats
.sec
+= er32(SEC
);
3328 adapter
->stats
.rlec
+= er32(RLEC
);
3329 adapter
->stats
.xonrxc
+= er32(XONRXC
);
3330 adapter
->stats
.xontxc
+= er32(XONTXC
);
3331 adapter
->stats
.xoffrxc
+= er32(XOFFRXC
);
3332 adapter
->stats
.xofftxc
+= er32(XOFFTXC
);
3333 adapter
->stats
.fcruc
+= er32(FCRUC
);
3334 adapter
->stats
.gptc
+= er32(GPTC
);
3335 adapter
->stats
.gotcl
+= er32(GOTCL
);
3336 adapter
->stats
.gotch
+= er32(GOTCH
);
3337 adapter
->stats
.rnbc
+= er32(RNBC
);
3338 adapter
->stats
.ruc
+= er32(RUC
);
3339 adapter
->stats
.rfc
+= er32(RFC
);
3340 adapter
->stats
.rjc
+= er32(RJC
);
3341 adapter
->stats
.torl
+= er32(TORL
);
3342 adapter
->stats
.torh
+= er32(TORH
);
3343 adapter
->stats
.totl
+= er32(TOTL
);
3344 adapter
->stats
.toth
+= er32(TOTH
);
3345 adapter
->stats
.tpr
+= er32(TPR
);
3347 adapter
->stats
.ptc64
+= er32(PTC64
);
3348 adapter
->stats
.ptc127
+= er32(PTC127
);
3349 adapter
->stats
.ptc255
+= er32(PTC255
);
3350 adapter
->stats
.ptc511
+= er32(PTC511
);
3351 adapter
->stats
.ptc1023
+= er32(PTC1023
);
3352 adapter
->stats
.ptc1522
+= er32(PTC1522
);
3354 adapter
->stats
.mptc
+= er32(MPTC
);
3355 adapter
->stats
.bptc
+= er32(BPTC
);
3357 /* used for adaptive IFS */
3359 hw
->tx_packet_delta
= er32(TPT
);
3360 adapter
->stats
.tpt
+= hw
->tx_packet_delta
;
3361 hw
->collision_delta
= er32(COLC
);
3362 adapter
->stats
.colc
+= hw
->collision_delta
;
3364 if (hw
->mac_type
>= e1000_82543
) {
3365 adapter
->stats
.algnerrc
+= er32(ALGNERRC
);
3366 adapter
->stats
.rxerrc
+= er32(RXERRC
);
3367 adapter
->stats
.tncrs
+= er32(TNCRS
);
3368 adapter
->stats
.cexterr
+= er32(CEXTERR
);
3369 adapter
->stats
.tsctc
+= er32(TSCTC
);
3370 adapter
->stats
.tsctfc
+= er32(TSCTFC
);
3373 /* Fill out the OS statistics structure */
3374 netdev
->stats
.multicast
= adapter
->stats
.mprc
;
3375 netdev
->stats
.collisions
= adapter
->stats
.colc
;
3379 /* RLEC on some newer hardware can be incorrect so build
3380 * our own version based on RUC and ROC */
3381 netdev
->stats
.rx_errors
= adapter
->stats
.rxerrc
+
3382 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3383 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3384 adapter
->stats
.cexterr
;
3385 adapter
->stats
.rlerrc
= adapter
->stats
.ruc
+ adapter
->stats
.roc
;
3386 netdev
->stats
.rx_length_errors
= adapter
->stats
.rlerrc
;
3387 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3388 netdev
->stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3389 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3392 adapter
->stats
.txerrc
= adapter
->stats
.ecol
+ adapter
->stats
.latecol
;
3393 netdev
->stats
.tx_errors
= adapter
->stats
.txerrc
;
3394 netdev
->stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3395 netdev
->stats
.tx_window_errors
= adapter
->stats
.latecol
;
3396 netdev
->stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3397 if (hw
->bad_tx_carr_stats_fd
&&
3398 adapter
->link_duplex
== FULL_DUPLEX
) {
3399 netdev
->stats
.tx_carrier_errors
= 0;
3400 adapter
->stats
.tncrs
= 0;
3403 /* Tx Dropped needs to be maintained elsewhere */
3406 if (hw
->media_type
== e1000_media_type_copper
) {
3407 if ((adapter
->link_speed
== SPEED_1000
) &&
3408 (!e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_tmp
))) {
3409 phy_tmp
&= PHY_IDLE_ERROR_COUNT_MASK
;
3410 adapter
->phy_stats
.idle_errors
+= phy_tmp
;
3413 if ((hw
->mac_type
<= e1000_82546
) &&
3414 (hw
->phy_type
== e1000_phy_m88
) &&
3415 !e1000_read_phy_reg(hw
, M88E1000_RX_ERR_CNTR
, &phy_tmp
))
3416 adapter
->phy_stats
.receive_errors
+= phy_tmp
;
3419 /* Management Stats */
3420 if (hw
->has_smbus
) {
3421 adapter
->stats
.mgptc
+= er32(MGTPTC
);
3422 adapter
->stats
.mgprc
+= er32(MGTPRC
);
3423 adapter
->stats
.mgpdc
+= er32(MGTPDC
);
3426 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
3430 * e1000_intr - Interrupt Handler
3431 * @irq: interrupt number
3432 * @data: pointer to a network interface device structure
3435 static irqreturn_t
e1000_intr(int irq
, void *data
)
3437 struct net_device
*netdev
= data
;
3438 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3439 struct e1000_hw
*hw
= &adapter
->hw
;
3440 u32 icr
= er32(ICR
);
3442 if (unlikely((!icr
) || test_bit(__E1000_DOWN
, &adapter
->flags
)))
3443 return IRQ_NONE
; /* Not our interrupt */
3445 if (unlikely(icr
& (E1000_ICR_RXSEQ
| E1000_ICR_LSC
))) {
3446 hw
->get_link_status
= 1;
3447 /* guard against interrupt when we're going down */
3448 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3449 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
3452 /* disable interrupts, without the synchronize_irq bit */
3454 E1000_WRITE_FLUSH();
3456 if (likely(napi_schedule_prep(&adapter
->napi
))) {
3457 adapter
->total_tx_bytes
= 0;
3458 adapter
->total_tx_packets
= 0;
3459 adapter
->total_rx_bytes
= 0;
3460 adapter
->total_rx_packets
= 0;
3461 __napi_schedule(&adapter
->napi
);
3463 /* this really should not happen! if it does it is basically a
3464 * bug, but not a hard error, so enable ints and continue */
3465 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3466 e1000_irq_enable(adapter
);
3473 * e1000_clean - NAPI Rx polling callback
3474 * @adapter: board private structure
3476 static int e1000_clean(struct napi_struct
*napi
, int budget
)
3478 struct e1000_adapter
*adapter
= container_of(napi
, struct e1000_adapter
, napi
);
3479 int tx_clean_complete
= 0, work_done
= 0;
3481 tx_clean_complete
= e1000_clean_tx_irq(adapter
, &adapter
->tx_ring
[0]);
3483 adapter
->clean_rx(adapter
, &adapter
->rx_ring
[0], &work_done
, budget
);
3485 if (!tx_clean_complete
)
3488 /* If budget not fully consumed, exit the polling mode */
3489 if (work_done
< budget
) {
3490 if (likely(adapter
->itr_setting
& 3))
3491 e1000_set_itr(adapter
);
3492 napi_complete(napi
);
3493 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3494 e1000_irq_enable(adapter
);
3501 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3502 * @adapter: board private structure
3504 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
3505 struct e1000_tx_ring
*tx_ring
)
3507 struct e1000_hw
*hw
= &adapter
->hw
;
3508 struct net_device
*netdev
= adapter
->netdev
;
3509 struct e1000_tx_desc
*tx_desc
, *eop_desc
;
3510 struct e1000_buffer
*buffer_info
;
3511 unsigned int i
, eop
;
3512 unsigned int count
= 0;
3513 unsigned int total_tx_bytes
=0, total_tx_packets
=0;
3515 i
= tx_ring
->next_to_clean
;
3516 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3517 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3519 while ((eop_desc
->upper
.data
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
3520 (count
< tx_ring
->count
)) {
3521 bool cleaned
= false;
3522 rmb(); /* read buffer_info after eop_desc */
3523 for ( ; !cleaned
; count
++) {
3524 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3525 buffer_info
= &tx_ring
->buffer_info
[i
];
3526 cleaned
= (i
== eop
);
3529 struct sk_buff
*skb
= buffer_info
->skb
;
3530 unsigned int segs
, bytecount
;
3531 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
3532 /* multiply data chunks by size of headers */
3533 bytecount
= ((segs
- 1) * skb_headlen(skb
)) +
3535 total_tx_packets
+= segs
;
3536 total_tx_bytes
+= bytecount
;
3538 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
3539 tx_desc
->upper
.data
= 0;
3541 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
3544 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3545 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3548 tx_ring
->next_to_clean
= i
;
3550 #define TX_WAKE_THRESHOLD 32
3551 if (unlikely(count
&& netif_carrier_ok(netdev
) &&
3552 E1000_DESC_UNUSED(tx_ring
) >= TX_WAKE_THRESHOLD
)) {
3553 /* Make sure that anybody stopping the queue after this
3554 * sees the new next_to_clean.
3558 if (netif_queue_stopped(netdev
) &&
3559 !(test_bit(__E1000_DOWN
, &adapter
->flags
))) {
3560 netif_wake_queue(netdev
);
3561 ++adapter
->restart_queue
;
3565 if (adapter
->detect_tx_hung
) {
3566 /* Detect a transmit hang in hardware, this serializes the
3567 * check with the clearing of time_stamp and movement of i */
3568 adapter
->detect_tx_hung
= false;
3569 if (tx_ring
->buffer_info
[eop
].time_stamp
&&
3570 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+
3571 (adapter
->tx_timeout_factor
* HZ
)) &&
3572 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
3574 /* detected Tx unit hang */
3575 e_err(drv
, "Detected Tx Unit Hang\n"
3579 " next_to_use <%x>\n"
3580 " next_to_clean <%x>\n"
3581 "buffer_info[next_to_clean]\n"
3582 " time_stamp <%lx>\n"
3583 " next_to_watch <%x>\n"
3585 " next_to_watch.status <%x>\n",
3586 (unsigned long)((tx_ring
- adapter
->tx_ring
) /
3587 sizeof(struct e1000_tx_ring
)),
3588 readl(hw
->hw_addr
+ tx_ring
->tdh
),
3589 readl(hw
->hw_addr
+ tx_ring
->tdt
),
3590 tx_ring
->next_to_use
,
3591 tx_ring
->next_to_clean
,
3592 tx_ring
->buffer_info
[eop
].time_stamp
,
3595 eop_desc
->upper
.fields
.status
);
3596 netif_stop_queue(netdev
);
3599 adapter
->total_tx_bytes
+= total_tx_bytes
;
3600 adapter
->total_tx_packets
+= total_tx_packets
;
3601 netdev
->stats
.tx_bytes
+= total_tx_bytes
;
3602 netdev
->stats
.tx_packets
+= total_tx_packets
;
3603 return count
< tx_ring
->count
;
3607 * e1000_rx_checksum - Receive Checksum Offload for 82543
3608 * @adapter: board private structure
3609 * @status_err: receive descriptor status and error fields
3610 * @csum: receive descriptor csum field
3611 * @sk_buff: socket buffer with received data
3614 static void e1000_rx_checksum(struct e1000_adapter
*adapter
, u32 status_err
,
3615 u32 csum
, struct sk_buff
*skb
)
3617 struct e1000_hw
*hw
= &adapter
->hw
;
3618 u16 status
= (u16
)status_err
;
3619 u8 errors
= (u8
)(status_err
>> 24);
3621 skb_checksum_none_assert(skb
);
3623 /* 82543 or newer only */
3624 if (unlikely(hw
->mac_type
< e1000_82543
)) return;
3625 /* Ignore Checksum bit is set */
3626 if (unlikely(status
& E1000_RXD_STAT_IXSM
)) return;
3627 /* TCP/UDP checksum error bit is set */
3628 if (unlikely(errors
& E1000_RXD_ERR_TCPE
)) {
3629 /* let the stack verify checksum errors */
3630 adapter
->hw_csum_err
++;
3633 /* TCP/UDP Checksum has not been calculated */
3634 if (!(status
& E1000_RXD_STAT_TCPCS
))
3637 /* It must be a TCP or UDP packet with a valid checksum */
3638 if (likely(status
& E1000_RXD_STAT_TCPCS
)) {
3639 /* TCP checksum is good */
3640 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3642 adapter
->hw_csum_good
++;
3646 * e1000_consume_page - helper function
3648 static void e1000_consume_page(struct e1000_buffer
*bi
, struct sk_buff
*skb
,
3653 skb
->data_len
+= length
;
3654 skb
->truesize
+= length
;
3658 * e1000_receive_skb - helper function to handle rx indications
3659 * @adapter: board private structure
3660 * @status: descriptor status field as written by hardware
3661 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3662 * @skb: pointer to sk_buff to be indicated to stack
3664 static void e1000_receive_skb(struct e1000_adapter
*adapter
, u8 status
,
3665 __le16 vlan
, struct sk_buff
*skb
)
3667 skb
->protocol
= eth_type_trans(skb
, adapter
->netdev
);
3669 if ((unlikely(adapter
->vlgrp
&& (status
& E1000_RXD_STAT_VP
))))
3670 vlan_gro_receive(&adapter
->napi
, adapter
->vlgrp
,
3671 le16_to_cpu(vlan
) & E1000_RXD_SPC_VLAN_MASK
,
3674 napi_gro_receive(&adapter
->napi
, skb
);
3678 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3679 * @adapter: board private structure
3680 * @rx_ring: ring to clean
3681 * @work_done: amount of napi work completed this call
3682 * @work_to_do: max amount of work allowed for this call to do
3684 * the return value indicates whether actual cleaning was done, there
3685 * is no guarantee that everything was cleaned
3687 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
3688 struct e1000_rx_ring
*rx_ring
,
3689 int *work_done
, int work_to_do
)
3691 struct e1000_hw
*hw
= &adapter
->hw
;
3692 struct net_device
*netdev
= adapter
->netdev
;
3693 struct pci_dev
*pdev
= adapter
->pdev
;
3694 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
3695 struct e1000_buffer
*buffer_info
, *next_buffer
;
3696 unsigned long irq_flags
;
3699 int cleaned_count
= 0;
3700 bool cleaned
= false;
3701 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
3703 i
= rx_ring
->next_to_clean
;
3704 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
3705 buffer_info
= &rx_ring
->buffer_info
[i
];
3707 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
3708 struct sk_buff
*skb
;
3711 if (*work_done
>= work_to_do
)
3714 rmb(); /* read descriptor and rx_buffer_info after status DD */
3716 status
= rx_desc
->status
;
3717 skb
= buffer_info
->skb
;
3718 buffer_info
->skb
= NULL
;
3720 if (++i
== rx_ring
->count
) i
= 0;
3721 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
3724 next_buffer
= &rx_ring
->buffer_info
[i
];
3728 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
3729 buffer_info
->length
, DMA_FROM_DEVICE
);
3730 buffer_info
->dma
= 0;
3732 length
= le16_to_cpu(rx_desc
->length
);
3734 /* errors is only valid for DD + EOP descriptors */
3735 if (unlikely((status
& E1000_RXD_STAT_EOP
) &&
3736 (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
))) {
3737 u8 last_byte
= *(skb
->data
+ length
- 1);
3738 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
3740 spin_lock_irqsave(&adapter
->stats_lock
,
3742 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
3744 spin_unlock_irqrestore(&adapter
->stats_lock
,
3748 /* recycle both page and skb */
3749 buffer_info
->skb
= skb
;
3750 /* an error means any chain goes out the window
3752 if (rx_ring
->rx_skb_top
)
3753 dev_kfree_skb(rx_ring
->rx_skb_top
);
3754 rx_ring
->rx_skb_top
= NULL
;
3759 #define rxtop rx_ring->rx_skb_top
3760 if (!(status
& E1000_RXD_STAT_EOP
)) {
3761 /* this descriptor is only the beginning (or middle) */
3763 /* this is the beginning of a chain */
3765 skb_fill_page_desc(rxtop
, 0, buffer_info
->page
,
3768 /* this is the middle of a chain */
3769 skb_fill_page_desc(rxtop
,
3770 skb_shinfo(rxtop
)->nr_frags
,
3771 buffer_info
->page
, 0, length
);
3772 /* re-use the skb, only consumed the page */
3773 buffer_info
->skb
= skb
;
3775 e1000_consume_page(buffer_info
, rxtop
, length
);
3779 /* end of the chain */
3780 skb_fill_page_desc(rxtop
,
3781 skb_shinfo(rxtop
)->nr_frags
,
3782 buffer_info
->page
, 0, length
);
3783 /* re-use the current skb, we only consumed the
3785 buffer_info
->skb
= skb
;
3788 e1000_consume_page(buffer_info
, skb
, length
);
3790 /* no chain, got EOP, this buf is the packet
3791 * copybreak to save the put_page/alloc_page */
3792 if (length
<= copybreak
&&
3793 skb_tailroom(skb
) >= length
) {
3795 vaddr
= kmap_atomic(buffer_info
->page
,
3796 KM_SKB_DATA_SOFTIRQ
);
3797 memcpy(skb_tail_pointer(skb
), vaddr
, length
);
3798 kunmap_atomic(vaddr
,
3799 KM_SKB_DATA_SOFTIRQ
);
3800 /* re-use the page, so don't erase
3801 * buffer_info->page */
3802 skb_put(skb
, length
);
3804 skb_fill_page_desc(skb
, 0,
3805 buffer_info
->page
, 0,
3807 e1000_consume_page(buffer_info
, skb
,
3813 /* Receive Checksum Offload XXX recompute due to CRC strip? */
3814 e1000_rx_checksum(adapter
,
3816 ((u32
)(rx_desc
->errors
) << 24),
3817 le16_to_cpu(rx_desc
->csum
), skb
);
3819 pskb_trim(skb
, skb
->len
- 4);
3821 /* probably a little skewed due to removing CRC */
3822 total_rx_bytes
+= skb
->len
;
3825 /* eth type trans needs skb->data to point to something */
3826 if (!pskb_may_pull(skb
, ETH_HLEN
)) {
3827 e_err(drv
, "pskb_may_pull failed.\n");
3832 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
3835 rx_desc
->status
= 0;
3837 /* return some buffers to hardware, one at a time is too slow */
3838 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
3839 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
3843 /* use prefetched values */
3845 buffer_info
= next_buffer
;
3847 rx_ring
->next_to_clean
= i
;
3849 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
3851 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
3853 adapter
->total_rx_packets
+= total_rx_packets
;
3854 adapter
->total_rx_bytes
+= total_rx_bytes
;
3855 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
3856 netdev
->stats
.rx_packets
+= total_rx_packets
;
3861 * this should improve performance for small packets with large amounts
3862 * of reassembly being done in the stack
3864 static void e1000_check_copybreak(struct net_device
*netdev
,
3865 struct e1000_buffer
*buffer_info
,
3866 u32 length
, struct sk_buff
**skb
)
3868 struct sk_buff
*new_skb
;
3870 if (length
> copybreak
)
3873 new_skb
= netdev_alloc_skb_ip_align(netdev
, length
);
3877 skb_copy_to_linear_data_offset(new_skb
, -NET_IP_ALIGN
,
3878 (*skb
)->data
- NET_IP_ALIGN
,
3879 length
+ NET_IP_ALIGN
);
3880 /* save the skb in buffer_info as good */
3881 buffer_info
->skb
= *skb
;
3886 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3887 * @adapter: board private structure
3888 * @rx_ring: ring to clean
3889 * @work_done: amount of napi work completed this call
3890 * @work_to_do: max amount of work allowed for this call to do
3892 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
3893 struct e1000_rx_ring
*rx_ring
,
3894 int *work_done
, int work_to_do
)
3896 struct e1000_hw
*hw
= &adapter
->hw
;
3897 struct net_device
*netdev
= adapter
->netdev
;
3898 struct pci_dev
*pdev
= adapter
->pdev
;
3899 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
3900 struct e1000_buffer
*buffer_info
, *next_buffer
;
3901 unsigned long flags
;
3904 int cleaned_count
= 0;
3905 bool cleaned
= false;
3906 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
3908 i
= rx_ring
->next_to_clean
;
3909 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
3910 buffer_info
= &rx_ring
->buffer_info
[i
];
3912 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
3913 struct sk_buff
*skb
;
3916 if (*work_done
>= work_to_do
)
3919 rmb(); /* read descriptor and rx_buffer_info after status DD */
3921 status
= rx_desc
->status
;
3922 skb
= buffer_info
->skb
;
3923 buffer_info
->skb
= NULL
;
3925 prefetch(skb
->data
- NET_IP_ALIGN
);
3927 if (++i
== rx_ring
->count
) i
= 0;
3928 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
3931 next_buffer
= &rx_ring
->buffer_info
[i
];
3935 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
3936 buffer_info
->length
, DMA_FROM_DEVICE
);
3937 buffer_info
->dma
= 0;
3939 length
= le16_to_cpu(rx_desc
->length
);
3940 /* !EOP means multiple descriptors were used to store a single
3941 * packet, if thats the case we need to toss it. In fact, we
3942 * to toss every packet with the EOP bit clear and the next
3943 * frame that _does_ have the EOP bit set, as it is by
3944 * definition only a frame fragment
3946 if (unlikely(!(status
& E1000_RXD_STAT_EOP
)))
3947 adapter
->discarding
= true;
3949 if (adapter
->discarding
) {
3950 /* All receives must fit into a single buffer */
3951 e_dbg("Receive packet consumed multiple buffers\n");
3953 buffer_info
->skb
= skb
;
3954 if (status
& E1000_RXD_STAT_EOP
)
3955 adapter
->discarding
= false;
3959 if (unlikely(rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
)) {
3960 u8 last_byte
= *(skb
->data
+ length
- 1);
3961 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
3963 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
3964 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
3966 spin_unlock_irqrestore(&adapter
->stats_lock
,
3971 buffer_info
->skb
= skb
;
3976 /* adjust length to remove Ethernet CRC, this must be
3977 * done after the TBI_ACCEPT workaround above */
3980 /* probably a little skewed due to removing CRC */
3981 total_rx_bytes
+= length
;
3984 e1000_check_copybreak(netdev
, buffer_info
, length
, &skb
);
3986 skb_put(skb
, length
);
3988 /* Receive Checksum Offload */
3989 e1000_rx_checksum(adapter
,
3991 ((u32
)(rx_desc
->errors
) << 24),
3992 le16_to_cpu(rx_desc
->csum
), skb
);
3994 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
3997 rx_desc
->status
= 0;
3999 /* return some buffers to hardware, one at a time is too slow */
4000 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
4001 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4005 /* use prefetched values */
4007 buffer_info
= next_buffer
;
4009 rx_ring
->next_to_clean
= i
;
4011 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
4013 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4015 adapter
->total_rx_packets
+= total_rx_packets
;
4016 adapter
->total_rx_bytes
+= total_rx_bytes
;
4017 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
4018 netdev
->stats
.rx_packets
+= total_rx_packets
;
4023 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4024 * @adapter: address of board private structure
4025 * @rx_ring: pointer to receive ring structure
4026 * @cleaned_count: number of buffers to allocate this pass
4030 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
4031 struct e1000_rx_ring
*rx_ring
, int cleaned_count
)
4033 struct net_device
*netdev
= adapter
->netdev
;
4034 struct pci_dev
*pdev
= adapter
->pdev
;
4035 struct e1000_rx_desc
*rx_desc
;
4036 struct e1000_buffer
*buffer_info
;
4037 struct sk_buff
*skb
;
4039 unsigned int bufsz
= 256 - 16 /*for skb_reserve */ ;
4041 i
= rx_ring
->next_to_use
;
4042 buffer_info
= &rx_ring
->buffer_info
[i
];
4044 while (cleaned_count
--) {
4045 skb
= buffer_info
->skb
;
4051 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4052 if (unlikely(!skb
)) {
4053 /* Better luck next round */
4054 adapter
->alloc_rx_buff_failed
++;
4058 /* Fix for errata 23, can't cross 64kB boundary */
4059 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4060 struct sk_buff
*oldskb
= skb
;
4061 e_err(rx_err
, "skb align check failed: %u bytes at "
4062 "%p\n", bufsz
, skb
->data
);
4063 /* Try again, without freeing the previous */
4064 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4065 /* Failed allocation, critical failure */
4067 dev_kfree_skb(oldskb
);
4068 adapter
->alloc_rx_buff_failed
++;
4072 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4075 dev_kfree_skb(oldskb
);
4076 break; /* while (cleaned_count--) */
4079 /* Use new allocation */
4080 dev_kfree_skb(oldskb
);
4082 buffer_info
->skb
= skb
;
4083 buffer_info
->length
= adapter
->rx_buffer_len
;
4085 /* allocate a new page if necessary */
4086 if (!buffer_info
->page
) {
4087 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
4088 if (unlikely(!buffer_info
->page
)) {
4089 adapter
->alloc_rx_buff_failed
++;
4094 if (!buffer_info
->dma
) {
4095 buffer_info
->dma
= dma_map_page(&pdev
->dev
,
4096 buffer_info
->page
, 0,
4097 buffer_info
->length
,
4099 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4100 put_page(buffer_info
->page
);
4102 buffer_info
->page
= NULL
;
4103 buffer_info
->skb
= NULL
;
4104 buffer_info
->dma
= 0;
4105 adapter
->alloc_rx_buff_failed
++;
4106 break; /* while !buffer_info->skb */
4110 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4111 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4113 if (unlikely(++i
== rx_ring
->count
))
4115 buffer_info
= &rx_ring
->buffer_info
[i
];
4118 if (likely(rx_ring
->next_to_use
!= i
)) {
4119 rx_ring
->next_to_use
= i
;
4120 if (unlikely(i
-- == 0))
4121 i
= (rx_ring
->count
- 1);
4123 /* Force memory writes to complete before letting h/w
4124 * know there are new descriptors to fetch. (Only
4125 * applicable for weak-ordered memory model archs,
4126 * such as IA-64). */
4128 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->rdt
);
4133 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4134 * @adapter: address of board private structure
4137 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
4138 struct e1000_rx_ring
*rx_ring
,
4141 struct e1000_hw
*hw
= &adapter
->hw
;
4142 struct net_device
*netdev
= adapter
->netdev
;
4143 struct pci_dev
*pdev
= adapter
->pdev
;
4144 struct e1000_rx_desc
*rx_desc
;
4145 struct e1000_buffer
*buffer_info
;
4146 struct sk_buff
*skb
;
4148 unsigned int bufsz
= adapter
->rx_buffer_len
;
4150 i
= rx_ring
->next_to_use
;
4151 buffer_info
= &rx_ring
->buffer_info
[i
];
4153 while (cleaned_count
--) {
4154 skb
= buffer_info
->skb
;
4160 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4161 if (unlikely(!skb
)) {
4162 /* Better luck next round */
4163 adapter
->alloc_rx_buff_failed
++;
4167 /* Fix for errata 23, can't cross 64kB boundary */
4168 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4169 struct sk_buff
*oldskb
= skb
;
4170 e_err(rx_err
, "skb align check failed: %u bytes at "
4171 "%p\n", bufsz
, skb
->data
);
4172 /* Try again, without freeing the previous */
4173 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4174 /* Failed allocation, critical failure */
4176 dev_kfree_skb(oldskb
);
4177 adapter
->alloc_rx_buff_failed
++;
4181 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4184 dev_kfree_skb(oldskb
);
4185 adapter
->alloc_rx_buff_failed
++;
4186 break; /* while !buffer_info->skb */
4189 /* Use new allocation */
4190 dev_kfree_skb(oldskb
);
4192 buffer_info
->skb
= skb
;
4193 buffer_info
->length
= adapter
->rx_buffer_len
;
4195 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
4197 buffer_info
->length
,
4199 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4201 buffer_info
->skb
= NULL
;
4202 buffer_info
->dma
= 0;
4203 adapter
->alloc_rx_buff_failed
++;
4204 break; /* while !buffer_info->skb */
4208 * XXX if it was allocated cleanly it will never map to a
4212 /* Fix for errata 23, can't cross 64kB boundary */
4213 if (!e1000_check_64k_bound(adapter
,
4214 (void *)(unsigned long)buffer_info
->dma
,
4215 adapter
->rx_buffer_len
)) {
4216 e_err(rx_err
, "dma align check failed: %u bytes at "
4217 "%p\n", adapter
->rx_buffer_len
,
4218 (void *)(unsigned long)buffer_info
->dma
);
4220 buffer_info
->skb
= NULL
;
4222 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4223 adapter
->rx_buffer_len
,
4225 buffer_info
->dma
= 0;
4227 adapter
->alloc_rx_buff_failed
++;
4228 break; /* while !buffer_info->skb */
4230 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4231 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4233 if (unlikely(++i
== rx_ring
->count
))
4235 buffer_info
= &rx_ring
->buffer_info
[i
];
4238 if (likely(rx_ring
->next_to_use
!= i
)) {
4239 rx_ring
->next_to_use
= i
;
4240 if (unlikely(i
-- == 0))
4241 i
= (rx_ring
->count
- 1);
4243 /* Force memory writes to complete before letting h/w
4244 * know there are new descriptors to fetch. (Only
4245 * applicable for weak-ordered memory model archs,
4246 * such as IA-64). */
4248 writel(i
, hw
->hw_addr
+ rx_ring
->rdt
);
4253 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4257 static void e1000_smartspeed(struct e1000_adapter
*adapter
)
4259 struct e1000_hw
*hw
= &adapter
->hw
;
4263 if ((hw
->phy_type
!= e1000_phy_igp
) || !hw
->autoneg
||
4264 !(hw
->autoneg_advertised
& ADVERTISE_1000_FULL
))
4267 if (adapter
->smartspeed
== 0) {
4268 /* If Master/Slave config fault is asserted twice,
4269 * we assume back-to-back */
4270 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4271 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4272 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4273 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4274 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4275 if (phy_ctrl
& CR_1000T_MS_ENABLE
) {
4276 phy_ctrl
&= ~CR_1000T_MS_ENABLE
;
4277 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
,
4279 adapter
->smartspeed
++;
4280 if (!e1000_phy_setup_autoneg(hw
) &&
4281 !e1000_read_phy_reg(hw
, PHY_CTRL
,
4283 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4284 MII_CR_RESTART_AUTO_NEG
);
4285 e1000_write_phy_reg(hw
, PHY_CTRL
,
4290 } else if (adapter
->smartspeed
== E1000_SMARTSPEED_DOWNSHIFT
) {
4291 /* If still no link, perhaps using 2/3 pair cable */
4292 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4293 phy_ctrl
|= CR_1000T_MS_ENABLE
;
4294 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
, phy_ctrl
);
4295 if (!e1000_phy_setup_autoneg(hw
) &&
4296 !e1000_read_phy_reg(hw
, PHY_CTRL
, &phy_ctrl
)) {
4297 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4298 MII_CR_RESTART_AUTO_NEG
);
4299 e1000_write_phy_reg(hw
, PHY_CTRL
, phy_ctrl
);
4302 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4303 if (adapter
->smartspeed
++ == E1000_SMARTSPEED_MAX
)
4304 adapter
->smartspeed
= 0;
4314 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4320 return e1000_mii_ioctl(netdev
, ifr
, cmd
);
4333 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
4336 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4337 struct e1000_hw
*hw
= &adapter
->hw
;
4338 struct mii_ioctl_data
*data
= if_mii(ifr
);
4342 unsigned long flags
;
4344 if (hw
->media_type
!= e1000_media_type_copper
)
4349 data
->phy_id
= hw
->phy_addr
;
4352 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4353 if (e1000_read_phy_reg(hw
, data
->reg_num
& 0x1F,
4355 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4358 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4361 if (data
->reg_num
& ~(0x1F))
4363 mii_reg
= data
->val_in
;
4364 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4365 if (e1000_write_phy_reg(hw
, data
->reg_num
,
4367 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4370 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4371 if (hw
->media_type
== e1000_media_type_copper
) {
4372 switch (data
->reg_num
) {
4374 if (mii_reg
& MII_CR_POWER_DOWN
)
4376 if (mii_reg
& MII_CR_AUTO_NEG_EN
) {
4378 hw
->autoneg_advertised
= 0x2F;
4381 spddplx
= SPEED_1000
;
4382 else if (mii_reg
& 0x2000)
4383 spddplx
= SPEED_100
;
4386 spddplx
+= (mii_reg
& 0x100)
4389 retval
= e1000_set_spd_dplx(adapter
,
4394 if (netif_running(adapter
->netdev
))
4395 e1000_reinit_locked(adapter
);
4397 e1000_reset(adapter
);
4399 case M88E1000_PHY_SPEC_CTRL
:
4400 case M88E1000_EXT_PHY_SPEC_CTRL
:
4401 if (e1000_phy_reset(hw
))
4406 switch (data
->reg_num
) {
4408 if (mii_reg
& MII_CR_POWER_DOWN
)
4410 if (netif_running(adapter
->netdev
))
4411 e1000_reinit_locked(adapter
);
4413 e1000_reset(adapter
);
4421 return E1000_SUCCESS
;
4424 void e1000_pci_set_mwi(struct e1000_hw
*hw
)
4426 struct e1000_adapter
*adapter
= hw
->back
;
4427 int ret_val
= pci_set_mwi(adapter
->pdev
);
4430 e_err(probe
, "Error in setting MWI\n");
4433 void e1000_pci_clear_mwi(struct e1000_hw
*hw
)
4435 struct e1000_adapter
*adapter
= hw
->back
;
4437 pci_clear_mwi(adapter
->pdev
);
4440 int e1000_pcix_get_mmrbc(struct e1000_hw
*hw
)
4442 struct e1000_adapter
*adapter
= hw
->back
;
4443 return pcix_get_mmrbc(adapter
->pdev
);
4446 void e1000_pcix_set_mmrbc(struct e1000_hw
*hw
, int mmrbc
)
4448 struct e1000_adapter
*adapter
= hw
->back
;
4449 pcix_set_mmrbc(adapter
->pdev
, mmrbc
);
4452 void e1000_io_write(struct e1000_hw
*hw
, unsigned long port
, u32 value
)
4457 static void e1000_vlan_rx_register(struct net_device
*netdev
,
4458 struct vlan_group
*grp
)
4460 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4461 struct e1000_hw
*hw
= &adapter
->hw
;
4464 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4465 e1000_irq_disable(adapter
);
4466 adapter
->vlgrp
= grp
;
4469 /* enable VLAN tag insert/strip */
4471 ctrl
|= E1000_CTRL_VME
;
4474 /* enable VLAN receive filtering */
4476 rctl
&= ~E1000_RCTL_CFIEN
;
4477 if (!(netdev
->flags
& IFF_PROMISC
))
4478 rctl
|= E1000_RCTL_VFE
;
4480 e1000_update_mng_vlan(adapter
);
4482 /* disable VLAN tag insert/strip */
4484 ctrl
&= ~E1000_CTRL_VME
;
4487 /* disable VLAN receive filtering */
4489 rctl
&= ~E1000_RCTL_VFE
;
4492 if (adapter
->mng_vlan_id
!= (u16
)E1000_MNG_VLAN_NONE
) {
4493 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
4494 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
4498 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4499 e1000_irq_enable(adapter
);
4502 static void e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
4504 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4505 struct e1000_hw
*hw
= &adapter
->hw
;
4508 if ((hw
->mng_cookie
.status
&
4509 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
4510 (vid
== adapter
->mng_vlan_id
))
4512 /* add VID to filter table */
4513 index
= (vid
>> 5) & 0x7F;
4514 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4515 vfta
|= (1 << (vid
& 0x1F));
4516 e1000_write_vfta(hw
, index
, vfta
);
4519 static void e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
4521 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4522 struct e1000_hw
*hw
= &adapter
->hw
;
4525 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4526 e1000_irq_disable(adapter
);
4527 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
4528 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4529 e1000_irq_enable(adapter
);
4531 /* remove VID from filter table */
4532 index
= (vid
>> 5) & 0x7F;
4533 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4534 vfta
&= ~(1 << (vid
& 0x1F));
4535 e1000_write_vfta(hw
, index
, vfta
);
4538 static void e1000_restore_vlan(struct e1000_adapter
*adapter
)
4540 e1000_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
4542 if (adapter
->vlgrp
) {
4544 for (vid
= 0; vid
< VLAN_N_VID
; vid
++) {
4545 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
4547 e1000_vlan_rx_add_vid(adapter
->netdev
, vid
);
4552 int e1000_set_spd_dplx(struct e1000_adapter
*adapter
, u16 spddplx
)
4554 struct e1000_hw
*hw
= &adapter
->hw
;
4558 /* Fiber NICs only allow 1000 gbps Full duplex */
4559 if ((hw
->media_type
== e1000_media_type_fiber
) &&
4560 spddplx
!= (SPEED_1000
+ DUPLEX_FULL
)) {
4561 e_err(probe
, "Unsupported Speed/Duplex configuration\n");
4566 case SPEED_10
+ DUPLEX_HALF
:
4567 hw
->forced_speed_duplex
= e1000_10_half
;
4569 case SPEED_10
+ DUPLEX_FULL
:
4570 hw
->forced_speed_duplex
= e1000_10_full
;
4572 case SPEED_100
+ DUPLEX_HALF
:
4573 hw
->forced_speed_duplex
= e1000_100_half
;
4575 case SPEED_100
+ DUPLEX_FULL
:
4576 hw
->forced_speed_duplex
= e1000_100_full
;
4578 case SPEED_1000
+ DUPLEX_FULL
:
4580 hw
->autoneg_advertised
= ADVERTISE_1000_FULL
;
4582 case SPEED_1000
+ DUPLEX_HALF
: /* not supported */
4584 e_err(probe
, "Unsupported Speed/Duplex configuration\n");
4590 static int __e1000_shutdown(struct pci_dev
*pdev
, bool *enable_wake
)
4592 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4593 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4594 struct e1000_hw
*hw
= &adapter
->hw
;
4595 u32 ctrl
, ctrl_ext
, rctl
, status
;
4596 u32 wufc
= adapter
->wol
;
4601 netif_device_detach(netdev
);
4603 if (netif_running(netdev
)) {
4604 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
4605 e1000_down(adapter
);
4609 retval
= pci_save_state(pdev
);
4614 status
= er32(STATUS
);
4615 if (status
& E1000_STATUS_LU
)
4616 wufc
&= ~E1000_WUFC_LNKC
;
4619 e1000_setup_rctl(adapter
);
4620 e1000_set_rx_mode(netdev
);
4622 /* turn on all-multi mode if wake on multicast is enabled */
4623 if (wufc
& E1000_WUFC_MC
) {
4625 rctl
|= E1000_RCTL_MPE
;
4629 if (hw
->mac_type
>= e1000_82540
) {
4631 /* advertise wake from D3Cold */
4632 #define E1000_CTRL_ADVD3WUC 0x00100000
4633 /* phy power management enable */
4634 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4635 ctrl
|= E1000_CTRL_ADVD3WUC
|
4636 E1000_CTRL_EN_PHY_PWR_MGMT
;
4640 if (hw
->media_type
== e1000_media_type_fiber
||
4641 hw
->media_type
== e1000_media_type_internal_serdes
) {
4642 /* keep the laser running in D3 */
4643 ctrl_ext
= er32(CTRL_EXT
);
4644 ctrl_ext
|= E1000_CTRL_EXT_SDP7_DATA
;
4645 ew32(CTRL_EXT
, ctrl_ext
);
4648 ew32(WUC
, E1000_WUC_PME_EN
);
4655 e1000_release_manageability(adapter
);
4657 *enable_wake
= !!wufc
;
4659 /* make sure adapter isn't asleep if manageability is enabled */
4660 if (adapter
->en_mng_pt
)
4661 *enable_wake
= true;
4663 if (netif_running(netdev
))
4664 e1000_free_irq(adapter
);
4666 pci_disable_device(pdev
);
4672 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4677 retval
= __e1000_shutdown(pdev
, &wake
);
4682 pci_prepare_to_sleep(pdev
);
4684 pci_wake_from_d3(pdev
, false);
4685 pci_set_power_state(pdev
, PCI_D3hot
);
4691 static int e1000_resume(struct pci_dev
*pdev
)
4693 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4694 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4695 struct e1000_hw
*hw
= &adapter
->hw
;
4698 pci_set_power_state(pdev
, PCI_D0
);
4699 pci_restore_state(pdev
);
4700 pci_save_state(pdev
);
4702 if (adapter
->need_ioport
)
4703 err
= pci_enable_device(pdev
);
4705 err
= pci_enable_device_mem(pdev
);
4707 pr_err("Cannot enable PCI device from suspend\n");
4710 pci_set_master(pdev
);
4712 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4713 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4715 if (netif_running(netdev
)) {
4716 err
= e1000_request_irq(adapter
);
4721 e1000_power_up_phy(adapter
);
4722 e1000_reset(adapter
);
4725 e1000_init_manageability(adapter
);
4727 if (netif_running(netdev
))
4730 netif_device_attach(netdev
);
4736 static void e1000_shutdown(struct pci_dev
*pdev
)
4740 __e1000_shutdown(pdev
, &wake
);
4742 if (system_state
== SYSTEM_POWER_OFF
) {
4743 pci_wake_from_d3(pdev
, wake
);
4744 pci_set_power_state(pdev
, PCI_D3hot
);
4748 #ifdef CONFIG_NET_POLL_CONTROLLER
4750 * Polling 'interrupt' - used by things like netconsole to send skbs
4751 * without having to re-enable interrupts. It's not called while
4752 * the interrupt routine is executing.
4754 static void e1000_netpoll(struct net_device
*netdev
)
4756 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4758 disable_irq(adapter
->pdev
->irq
);
4759 e1000_intr(adapter
->pdev
->irq
, netdev
);
4760 enable_irq(adapter
->pdev
->irq
);
4765 * e1000_io_error_detected - called when PCI error is detected
4766 * @pdev: Pointer to PCI device
4767 * @state: The current pci connection state
4769 * This function is called after a PCI bus error affecting
4770 * this device has been detected.
4772 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
4773 pci_channel_state_t state
)
4775 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4776 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4778 netif_device_detach(netdev
);
4780 if (state
== pci_channel_io_perm_failure
)
4781 return PCI_ERS_RESULT_DISCONNECT
;
4783 if (netif_running(netdev
))
4784 e1000_down(adapter
);
4785 pci_disable_device(pdev
);
4787 /* Request a slot slot reset. */
4788 return PCI_ERS_RESULT_NEED_RESET
;
4792 * e1000_io_slot_reset - called after the pci bus has been reset.
4793 * @pdev: Pointer to PCI device
4795 * Restart the card from scratch, as if from a cold-boot. Implementation
4796 * resembles the first-half of the e1000_resume routine.
4798 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
)
4800 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4801 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4802 struct e1000_hw
*hw
= &adapter
->hw
;
4805 if (adapter
->need_ioport
)
4806 err
= pci_enable_device(pdev
);
4808 err
= pci_enable_device_mem(pdev
);
4810 pr_err("Cannot re-enable PCI device after reset.\n");
4811 return PCI_ERS_RESULT_DISCONNECT
;
4813 pci_set_master(pdev
);
4815 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4816 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4818 e1000_reset(adapter
);
4821 return PCI_ERS_RESULT_RECOVERED
;
4825 * e1000_io_resume - called when traffic can start flowing again.
4826 * @pdev: Pointer to PCI device
4828 * This callback is called when the error recovery driver tells us that
4829 * its OK to resume normal operation. Implementation resembles the
4830 * second-half of the e1000_resume routine.
4832 static void e1000_io_resume(struct pci_dev
*pdev
)
4834 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4835 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4837 e1000_init_manageability(adapter
);
4839 if (netif_running(netdev
)) {
4840 if (e1000_up(adapter
)) {
4841 pr_info("can't bring device back up after reset\n");
4846 netif_device_attach(netdev
);