1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2009 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 *******************************************************************************/
29 #include <linux/module.h>
30 #include <linux/types.h>
31 #include <linux/init.h>
32 #include <linux/pci.h>
33 #include <linux/vmalloc.h>
34 #include <linux/pagemap.h>
35 #include <linux/delay.h>
36 #include <linux/netdevice.h>
37 #include <linux/tcp.h>
38 #include <linux/ipv6.h>
39 #include <linux/slab.h>
40 #include <net/checksum.h>
41 #include <net/ip6_checksum.h>
42 #include <linux/mii.h>
43 #include <linux/ethtool.h>
44 #include <linux/if_vlan.h>
45 #include <linux/cpu.h>
46 #include <linux/smp.h>
47 #include <linux/pm_qos_params.h>
48 #include <linux/aer.h>
52 #define DRV_VERSION "1.0.2-k2"
53 char e1000e_driver_name
[] = "e1000e";
54 const char e1000e_driver_version
[] = DRV_VERSION
;
56 static const struct e1000_info
*e1000_info_tbl
[] = {
57 [board_82571
] = &e1000_82571_info
,
58 [board_82572
] = &e1000_82572_info
,
59 [board_82573
] = &e1000_82573_info
,
60 [board_82574
] = &e1000_82574_info
,
61 [board_82583
] = &e1000_82583_info
,
62 [board_80003es2lan
] = &e1000_es2_info
,
63 [board_ich8lan
] = &e1000_ich8_info
,
64 [board_ich9lan
] = &e1000_ich9_info
,
65 [board_ich10lan
] = &e1000_ich10_info
,
66 [board_pchlan
] = &e1000_pch_info
,
70 * e1000_desc_unused - calculate if we have unused descriptors
72 static int e1000_desc_unused(struct e1000_ring
*ring
)
74 if (ring
->next_to_clean
> ring
->next_to_use
)
75 return ring
->next_to_clean
- ring
->next_to_use
- 1;
77 return ring
->count
+ ring
->next_to_clean
- ring
->next_to_use
- 1;
81 * e1000_receive_skb - helper function to handle Rx indications
82 * @adapter: board private structure
83 * @status: descriptor status field as written by hardware
84 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
85 * @skb: pointer to sk_buff to be indicated to stack
87 static void e1000_receive_skb(struct e1000_adapter
*adapter
,
88 struct net_device
*netdev
,
90 u8 status
, __le16 vlan
)
92 skb
->protocol
= eth_type_trans(skb
, netdev
);
94 if (adapter
->vlgrp
&& (status
& E1000_RXD_STAT_VP
))
95 vlan_gro_receive(&adapter
->napi
, adapter
->vlgrp
,
96 le16_to_cpu(vlan
), skb
);
98 napi_gro_receive(&adapter
->napi
, skb
);
102 * e1000_rx_checksum - Receive Checksum Offload for 82543
103 * @adapter: board private structure
104 * @status_err: receive descriptor status and error fields
105 * @csum: receive descriptor csum field
106 * @sk_buff: socket buffer with received data
108 static void e1000_rx_checksum(struct e1000_adapter
*adapter
, u32 status_err
,
109 u32 csum
, struct sk_buff
*skb
)
111 u16 status
= (u16
)status_err
;
112 u8 errors
= (u8
)(status_err
>> 24);
113 skb
->ip_summed
= CHECKSUM_NONE
;
115 /* Ignore Checksum bit is set */
116 if (status
& E1000_RXD_STAT_IXSM
)
118 /* TCP/UDP checksum error bit is set */
119 if (errors
& E1000_RXD_ERR_TCPE
) {
120 /* let the stack verify checksum errors */
121 adapter
->hw_csum_err
++;
125 /* TCP/UDP Checksum has not been calculated */
126 if (!(status
& (E1000_RXD_STAT_TCPCS
| E1000_RXD_STAT_UDPCS
)))
129 /* It must be a TCP or UDP packet with a valid checksum */
130 if (status
& E1000_RXD_STAT_TCPCS
) {
131 /* TCP checksum is good */
132 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
135 * IP fragment with UDP payload
136 * Hardware complements the payload checksum, so we undo it
137 * and then put the value in host order for further stack use.
139 __sum16 sum
= (__force __sum16
)htons(csum
);
140 skb
->csum
= csum_unfold(~sum
);
141 skb
->ip_summed
= CHECKSUM_COMPLETE
;
143 adapter
->hw_csum_good
++;
147 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
148 * @adapter: address of board private structure
150 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
153 struct net_device
*netdev
= adapter
->netdev
;
154 struct pci_dev
*pdev
= adapter
->pdev
;
155 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
156 struct e1000_rx_desc
*rx_desc
;
157 struct e1000_buffer
*buffer_info
;
160 unsigned int bufsz
= adapter
->rx_buffer_len
;
162 i
= rx_ring
->next_to_use
;
163 buffer_info
= &rx_ring
->buffer_info
[i
];
165 while (cleaned_count
--) {
166 skb
= buffer_info
->skb
;
172 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
174 /* Better luck next round */
175 adapter
->alloc_rx_buff_failed
++;
179 buffer_info
->skb
= skb
;
181 buffer_info
->dma
= pci_map_single(pdev
, skb
->data
,
182 adapter
->rx_buffer_len
,
184 if (pci_dma_mapping_error(pdev
, buffer_info
->dma
)) {
185 dev_err(&pdev
->dev
, "RX DMA map failed\n");
186 adapter
->rx_dma_failed
++;
190 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
191 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
194 if (i
== rx_ring
->count
)
196 buffer_info
= &rx_ring
->buffer_info
[i
];
199 if (rx_ring
->next_to_use
!= i
) {
200 rx_ring
->next_to_use
= i
;
202 i
= (rx_ring
->count
- 1);
205 * Force memory writes to complete before letting h/w
206 * know there are new descriptors to fetch. (Only
207 * applicable for weak-ordered memory model archs,
211 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
216 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
217 * @adapter: address of board private structure
219 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter
*adapter
,
222 struct net_device
*netdev
= adapter
->netdev
;
223 struct pci_dev
*pdev
= adapter
->pdev
;
224 union e1000_rx_desc_packet_split
*rx_desc
;
225 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
226 struct e1000_buffer
*buffer_info
;
227 struct e1000_ps_page
*ps_page
;
231 i
= rx_ring
->next_to_use
;
232 buffer_info
= &rx_ring
->buffer_info
[i
];
234 while (cleaned_count
--) {
235 rx_desc
= E1000_RX_DESC_PS(*rx_ring
, i
);
237 for (j
= 0; j
< PS_PAGE_BUFFERS
; j
++) {
238 ps_page
= &buffer_info
->ps_pages
[j
];
239 if (j
>= adapter
->rx_ps_pages
) {
240 /* all unused desc entries get hw null ptr */
241 rx_desc
->read
.buffer_addr
[j
+1] = ~cpu_to_le64(0);
244 if (!ps_page
->page
) {
245 ps_page
->page
= alloc_page(GFP_ATOMIC
);
246 if (!ps_page
->page
) {
247 adapter
->alloc_rx_buff_failed
++;
250 ps_page
->dma
= pci_map_page(pdev
,
254 if (pci_dma_mapping_error(pdev
, ps_page
->dma
)) {
255 dev_err(&adapter
->pdev
->dev
,
256 "RX DMA page map failed\n");
257 adapter
->rx_dma_failed
++;
262 * Refresh the desc even if buffer_addrs
263 * didn't change because each write-back
266 rx_desc
->read
.buffer_addr
[j
+1] =
267 cpu_to_le64(ps_page
->dma
);
270 skb
= netdev_alloc_skb_ip_align(netdev
,
271 adapter
->rx_ps_bsize0
);
274 adapter
->alloc_rx_buff_failed
++;
278 buffer_info
->skb
= skb
;
279 buffer_info
->dma
= pci_map_single(pdev
, skb
->data
,
280 adapter
->rx_ps_bsize0
,
282 if (pci_dma_mapping_error(pdev
, buffer_info
->dma
)) {
283 dev_err(&pdev
->dev
, "RX DMA map failed\n");
284 adapter
->rx_dma_failed
++;
286 dev_kfree_skb_any(skb
);
287 buffer_info
->skb
= NULL
;
291 rx_desc
->read
.buffer_addr
[0] = cpu_to_le64(buffer_info
->dma
);
294 if (i
== rx_ring
->count
)
296 buffer_info
= &rx_ring
->buffer_info
[i
];
300 if (rx_ring
->next_to_use
!= i
) {
301 rx_ring
->next_to_use
= i
;
304 i
= (rx_ring
->count
- 1);
307 * Force memory writes to complete before letting h/w
308 * know there are new descriptors to fetch. (Only
309 * applicable for weak-ordered memory model archs,
314 * Hardware increments by 16 bytes, but packet split
315 * descriptors are 32 bytes...so we increment tail
318 writel(i
<<1, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
323 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
324 * @adapter: address of board private structure
325 * @cleaned_count: number of buffers to allocate this pass
328 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
331 struct net_device
*netdev
= adapter
->netdev
;
332 struct pci_dev
*pdev
= adapter
->pdev
;
333 struct e1000_rx_desc
*rx_desc
;
334 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
335 struct e1000_buffer
*buffer_info
;
338 unsigned int bufsz
= 256 - 16 /* for skb_reserve */;
340 i
= rx_ring
->next_to_use
;
341 buffer_info
= &rx_ring
->buffer_info
[i
];
343 while (cleaned_count
--) {
344 skb
= buffer_info
->skb
;
350 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
351 if (unlikely(!skb
)) {
352 /* Better luck next round */
353 adapter
->alloc_rx_buff_failed
++;
357 buffer_info
->skb
= skb
;
359 /* allocate a new page if necessary */
360 if (!buffer_info
->page
) {
361 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
362 if (unlikely(!buffer_info
->page
)) {
363 adapter
->alloc_rx_buff_failed
++;
368 if (!buffer_info
->dma
)
369 buffer_info
->dma
= pci_map_page(pdev
,
370 buffer_info
->page
, 0,
374 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
375 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
377 if (unlikely(++i
== rx_ring
->count
))
379 buffer_info
= &rx_ring
->buffer_info
[i
];
382 if (likely(rx_ring
->next_to_use
!= i
)) {
383 rx_ring
->next_to_use
= i
;
384 if (unlikely(i
-- == 0))
385 i
= (rx_ring
->count
- 1);
387 /* Force memory writes to complete before letting h/w
388 * know there are new descriptors to fetch. (Only
389 * applicable for weak-ordered memory model archs,
392 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
397 * e1000_clean_rx_irq - Send received data up the network stack; legacy
398 * @adapter: board private structure
400 * the return value indicates whether actual cleaning was done, there
401 * is no guarantee that everything was cleaned
403 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
404 int *work_done
, int work_to_do
)
406 struct net_device
*netdev
= adapter
->netdev
;
407 struct pci_dev
*pdev
= adapter
->pdev
;
408 struct e1000_hw
*hw
= &adapter
->hw
;
409 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
410 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
411 struct e1000_buffer
*buffer_info
, *next_buffer
;
414 int cleaned_count
= 0;
416 unsigned int total_rx_bytes
= 0, total_rx_packets
= 0;
418 i
= rx_ring
->next_to_clean
;
419 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
420 buffer_info
= &rx_ring
->buffer_info
[i
];
422 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
426 if (*work_done
>= work_to_do
)
430 status
= rx_desc
->status
;
431 skb
= buffer_info
->skb
;
432 buffer_info
->skb
= NULL
;
434 prefetch(skb
->data
- NET_IP_ALIGN
);
437 if (i
== rx_ring
->count
)
439 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
442 next_buffer
= &rx_ring
->buffer_info
[i
];
446 pci_unmap_single(pdev
,
448 adapter
->rx_buffer_len
,
450 buffer_info
->dma
= 0;
452 length
= le16_to_cpu(rx_desc
->length
);
455 * !EOP means multiple descriptors were used to store a single
456 * packet, if that's the case we need to toss it. In fact, we
457 * need to toss every packet with the EOP bit clear and the
458 * next frame that _does_ have the EOP bit set, as it is by
459 * definition only a frame fragment
461 if (unlikely(!(status
& E1000_RXD_STAT_EOP
)))
462 adapter
->flags2
|= FLAG2_IS_DISCARDING
;
464 if (adapter
->flags2
& FLAG2_IS_DISCARDING
) {
465 /* All receives must fit into a single buffer */
466 e_dbg("Receive packet consumed multiple buffers\n");
468 buffer_info
->skb
= skb
;
469 if (status
& E1000_RXD_STAT_EOP
)
470 adapter
->flags2
&= ~FLAG2_IS_DISCARDING
;
474 if (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
) {
476 buffer_info
->skb
= skb
;
480 /* adjust length to remove Ethernet CRC */
481 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
))
484 total_rx_bytes
+= length
;
488 * code added for copybreak, this should improve
489 * performance for small packets with large amounts
490 * of reassembly being done in the stack
492 if (length
< copybreak
) {
493 struct sk_buff
*new_skb
=
494 netdev_alloc_skb_ip_align(netdev
, length
);
496 skb_copy_to_linear_data_offset(new_skb
,
502 /* save the skb in buffer_info as good */
503 buffer_info
->skb
= skb
;
506 /* else just continue with the old one */
508 /* end copybreak code */
509 skb_put(skb
, length
);
511 /* Receive Checksum Offload */
512 e1000_rx_checksum(adapter
,
514 ((u32
)(rx_desc
->errors
) << 24),
515 le16_to_cpu(rx_desc
->csum
), skb
);
517 e1000_receive_skb(adapter
, netdev
, skb
,status
,rx_desc
->special
);
522 /* return some buffers to hardware, one at a time is too slow */
523 if (cleaned_count
>= E1000_RX_BUFFER_WRITE
) {
524 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
528 /* use prefetched values */
530 buffer_info
= next_buffer
;
532 rx_ring
->next_to_clean
= i
;
534 cleaned_count
= e1000_desc_unused(rx_ring
);
536 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
538 adapter
->total_rx_bytes
+= total_rx_bytes
;
539 adapter
->total_rx_packets
+= total_rx_packets
;
540 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
541 netdev
->stats
.rx_packets
+= total_rx_packets
;
545 static void e1000_put_txbuf(struct e1000_adapter
*adapter
,
546 struct e1000_buffer
*buffer_info
)
548 if (buffer_info
->dma
) {
549 if (buffer_info
->mapped_as_page
)
550 pci_unmap_page(adapter
->pdev
, buffer_info
->dma
,
551 buffer_info
->length
, PCI_DMA_TODEVICE
);
553 pci_unmap_single(adapter
->pdev
, buffer_info
->dma
,
556 buffer_info
->dma
= 0;
558 if (buffer_info
->skb
) {
559 dev_kfree_skb_any(buffer_info
->skb
);
560 buffer_info
->skb
= NULL
;
562 buffer_info
->time_stamp
= 0;
565 static void e1000_print_hw_hang(struct work_struct
*work
)
567 struct e1000_adapter
*adapter
= container_of(work
,
568 struct e1000_adapter
,
570 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
571 unsigned int i
= tx_ring
->next_to_clean
;
572 unsigned int eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
573 struct e1000_tx_desc
*eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
574 struct e1000_hw
*hw
= &adapter
->hw
;
575 u16 phy_status
, phy_1000t_status
, phy_ext_status
;
578 e1e_rphy(hw
, PHY_STATUS
, &phy_status
);
579 e1e_rphy(hw
, PHY_1000T_STATUS
, &phy_1000t_status
);
580 e1e_rphy(hw
, PHY_EXT_STATUS
, &phy_ext_status
);
582 pci_read_config_word(adapter
->pdev
, PCI_STATUS
, &pci_status
);
584 /* detected Hardware unit hang */
585 e_err("Detected Hardware Unit Hang:\n"
588 " next_to_use <%x>\n"
589 " next_to_clean <%x>\n"
590 "buffer_info[next_to_clean]:\n"
591 " time_stamp <%lx>\n"
592 " next_to_watch <%x>\n"
594 " next_to_watch.status <%x>\n"
597 "PHY 1000BASE-T Status <%x>\n"
598 "PHY Extended Status <%x>\n"
600 readl(adapter
->hw
.hw_addr
+ tx_ring
->head
),
601 readl(adapter
->hw
.hw_addr
+ tx_ring
->tail
),
602 tx_ring
->next_to_use
,
603 tx_ring
->next_to_clean
,
604 tx_ring
->buffer_info
[eop
].time_stamp
,
607 eop_desc
->upper
.fields
.status
,
616 * e1000_clean_tx_irq - Reclaim resources after transmit completes
617 * @adapter: board private structure
619 * the return value indicates whether actual cleaning was done, there
620 * is no guarantee that everything was cleaned
622 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
)
624 struct net_device
*netdev
= adapter
->netdev
;
625 struct e1000_hw
*hw
= &adapter
->hw
;
626 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
627 struct e1000_tx_desc
*tx_desc
, *eop_desc
;
628 struct e1000_buffer
*buffer_info
;
630 unsigned int count
= 0;
631 unsigned int total_tx_bytes
= 0, total_tx_packets
= 0;
633 i
= tx_ring
->next_to_clean
;
634 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
635 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
637 while ((eop_desc
->upper
.data
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
638 (count
< tx_ring
->count
)) {
639 bool cleaned
= false;
640 for (; !cleaned
; count
++) {
641 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
642 buffer_info
= &tx_ring
->buffer_info
[i
];
643 cleaned
= (i
== eop
);
646 struct sk_buff
*skb
= buffer_info
->skb
;
647 unsigned int segs
, bytecount
;
648 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
649 /* multiply data chunks by size of headers */
650 bytecount
= ((segs
- 1) * skb_headlen(skb
)) +
652 total_tx_packets
+= segs
;
653 total_tx_bytes
+= bytecount
;
656 e1000_put_txbuf(adapter
, buffer_info
);
657 tx_desc
->upper
.data
= 0;
660 if (i
== tx_ring
->count
)
664 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
665 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
668 tx_ring
->next_to_clean
= i
;
670 #define TX_WAKE_THRESHOLD 32
671 if (count
&& netif_carrier_ok(netdev
) &&
672 e1000_desc_unused(tx_ring
) >= TX_WAKE_THRESHOLD
) {
673 /* Make sure that anybody stopping the queue after this
674 * sees the new next_to_clean.
678 if (netif_queue_stopped(netdev
) &&
679 !(test_bit(__E1000_DOWN
, &adapter
->state
))) {
680 netif_wake_queue(netdev
);
681 ++adapter
->restart_queue
;
685 if (adapter
->detect_tx_hung
) {
687 * Detect a transmit hang in hardware, this serializes the
688 * check with the clearing of time_stamp and movement of i
690 adapter
->detect_tx_hung
= 0;
691 if (tx_ring
->buffer_info
[i
].time_stamp
&&
692 time_after(jiffies
, tx_ring
->buffer_info
[i
].time_stamp
693 + (adapter
->tx_timeout_factor
* HZ
)) &&
694 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
695 schedule_work(&adapter
->print_hang_task
);
696 netif_stop_queue(netdev
);
699 adapter
->total_tx_bytes
+= total_tx_bytes
;
700 adapter
->total_tx_packets
+= total_tx_packets
;
701 netdev
->stats
.tx_bytes
+= total_tx_bytes
;
702 netdev
->stats
.tx_packets
+= total_tx_packets
;
703 return (count
< tx_ring
->count
);
707 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
708 * @adapter: board private structure
710 * the return value indicates whether actual cleaning was done, there
711 * is no guarantee that everything was cleaned
713 static bool e1000_clean_rx_irq_ps(struct e1000_adapter
*adapter
,
714 int *work_done
, int work_to_do
)
716 struct e1000_hw
*hw
= &adapter
->hw
;
717 union e1000_rx_desc_packet_split
*rx_desc
, *next_rxd
;
718 struct net_device
*netdev
= adapter
->netdev
;
719 struct pci_dev
*pdev
= adapter
->pdev
;
720 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
721 struct e1000_buffer
*buffer_info
, *next_buffer
;
722 struct e1000_ps_page
*ps_page
;
726 int cleaned_count
= 0;
728 unsigned int total_rx_bytes
= 0, total_rx_packets
= 0;
730 i
= rx_ring
->next_to_clean
;
731 rx_desc
= E1000_RX_DESC_PS(*rx_ring
, i
);
732 staterr
= le32_to_cpu(rx_desc
->wb
.middle
.status_error
);
733 buffer_info
= &rx_ring
->buffer_info
[i
];
735 while (staterr
& E1000_RXD_STAT_DD
) {
736 if (*work_done
>= work_to_do
)
739 skb
= buffer_info
->skb
;
741 /* in the packet split case this is header only */
742 prefetch(skb
->data
- NET_IP_ALIGN
);
745 if (i
== rx_ring
->count
)
747 next_rxd
= E1000_RX_DESC_PS(*rx_ring
, i
);
750 next_buffer
= &rx_ring
->buffer_info
[i
];
754 pci_unmap_single(pdev
, buffer_info
->dma
,
755 adapter
->rx_ps_bsize0
,
757 buffer_info
->dma
= 0;
759 /* see !EOP comment in other rx routine */
760 if (!(staterr
& E1000_RXD_STAT_EOP
))
761 adapter
->flags2
|= FLAG2_IS_DISCARDING
;
763 if (adapter
->flags2
& FLAG2_IS_DISCARDING
) {
764 e_dbg("Packet Split buffers didn't pick up the full "
766 dev_kfree_skb_irq(skb
);
767 if (staterr
& E1000_RXD_STAT_EOP
)
768 adapter
->flags2
&= ~FLAG2_IS_DISCARDING
;
772 if (staterr
& E1000_RXDEXT_ERR_FRAME_ERR_MASK
) {
773 dev_kfree_skb_irq(skb
);
777 length
= le16_to_cpu(rx_desc
->wb
.middle
.length0
);
780 e_dbg("Last part of the packet spanning multiple "
782 dev_kfree_skb_irq(skb
);
787 skb_put(skb
, length
);
791 * this looks ugly, but it seems compiler issues make it
792 * more efficient than reusing j
794 int l1
= le16_to_cpu(rx_desc
->wb
.upper
.length
[0]);
797 * page alloc/put takes too long and effects small packet
798 * throughput, so unsplit small packets and save the alloc/put
799 * only valid in softirq (napi) context to call kmap_*
801 if (l1
&& (l1
<= copybreak
) &&
802 ((length
+ l1
) <= adapter
->rx_ps_bsize0
)) {
805 ps_page
= &buffer_info
->ps_pages
[0];
808 * there is no documentation about how to call
809 * kmap_atomic, so we can't hold the mapping
812 pci_dma_sync_single_for_cpu(pdev
, ps_page
->dma
,
813 PAGE_SIZE
, PCI_DMA_FROMDEVICE
);
814 vaddr
= kmap_atomic(ps_page
->page
, KM_SKB_DATA_SOFTIRQ
);
815 memcpy(skb_tail_pointer(skb
), vaddr
, l1
);
816 kunmap_atomic(vaddr
, KM_SKB_DATA_SOFTIRQ
);
817 pci_dma_sync_single_for_device(pdev
, ps_page
->dma
,
818 PAGE_SIZE
, PCI_DMA_FROMDEVICE
);
821 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
))
829 for (j
= 0; j
< PS_PAGE_BUFFERS
; j
++) {
830 length
= le16_to_cpu(rx_desc
->wb
.upper
.length
[j
]);
834 ps_page
= &buffer_info
->ps_pages
[j
];
835 pci_unmap_page(pdev
, ps_page
->dma
, PAGE_SIZE
,
838 skb_fill_page_desc(skb
, j
, ps_page
->page
, 0, length
);
839 ps_page
->page
= NULL
;
841 skb
->data_len
+= length
;
842 skb
->truesize
+= length
;
845 /* strip the ethernet crc, problem is we're using pages now so
846 * this whole operation can get a little cpu intensive
848 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
))
849 pskb_trim(skb
, skb
->len
- 4);
852 total_rx_bytes
+= skb
->len
;
855 e1000_rx_checksum(adapter
, staterr
, le16_to_cpu(
856 rx_desc
->wb
.lower
.hi_dword
.csum_ip
.csum
), skb
);
858 if (rx_desc
->wb
.upper
.header_status
&
859 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP
))
860 adapter
->rx_hdr_split
++;
862 e1000_receive_skb(adapter
, netdev
, skb
,
863 staterr
, rx_desc
->wb
.middle
.vlan
);
866 rx_desc
->wb
.middle
.status_error
&= cpu_to_le32(~0xFF);
867 buffer_info
->skb
= NULL
;
869 /* return some buffers to hardware, one at a time is too slow */
870 if (cleaned_count
>= E1000_RX_BUFFER_WRITE
) {
871 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
875 /* use prefetched values */
877 buffer_info
= next_buffer
;
879 staterr
= le32_to_cpu(rx_desc
->wb
.middle
.status_error
);
881 rx_ring
->next_to_clean
= i
;
883 cleaned_count
= e1000_desc_unused(rx_ring
);
885 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
887 adapter
->total_rx_bytes
+= total_rx_bytes
;
888 adapter
->total_rx_packets
+= total_rx_packets
;
889 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
890 netdev
->stats
.rx_packets
+= total_rx_packets
;
895 * e1000_consume_page - helper function
897 static void e1000_consume_page(struct e1000_buffer
*bi
, struct sk_buff
*skb
,
902 skb
->data_len
+= length
;
903 skb
->truesize
+= length
;
907 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
908 * @adapter: board private structure
910 * the return value indicates whether actual cleaning was done, there
911 * is no guarantee that everything was cleaned
914 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
915 int *work_done
, int work_to_do
)
917 struct net_device
*netdev
= adapter
->netdev
;
918 struct pci_dev
*pdev
= adapter
->pdev
;
919 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
920 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
921 struct e1000_buffer
*buffer_info
, *next_buffer
;
924 int cleaned_count
= 0;
925 bool cleaned
= false;
926 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
928 i
= rx_ring
->next_to_clean
;
929 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
930 buffer_info
= &rx_ring
->buffer_info
[i
];
932 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
936 if (*work_done
>= work_to_do
)
940 status
= rx_desc
->status
;
941 skb
= buffer_info
->skb
;
942 buffer_info
->skb
= NULL
;
945 if (i
== rx_ring
->count
)
947 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
950 next_buffer
= &rx_ring
->buffer_info
[i
];
954 pci_unmap_page(pdev
, buffer_info
->dma
, PAGE_SIZE
,
956 buffer_info
->dma
= 0;
958 length
= le16_to_cpu(rx_desc
->length
);
960 /* errors is only valid for DD + EOP descriptors */
961 if (unlikely((status
& E1000_RXD_STAT_EOP
) &&
962 (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
))) {
963 /* recycle both page and skb */
964 buffer_info
->skb
= skb
;
965 /* an error means any chain goes out the window
967 if (rx_ring
->rx_skb_top
)
968 dev_kfree_skb(rx_ring
->rx_skb_top
);
969 rx_ring
->rx_skb_top
= NULL
;
973 #define rxtop rx_ring->rx_skb_top
974 if (!(status
& E1000_RXD_STAT_EOP
)) {
975 /* this descriptor is only the beginning (or middle) */
977 /* this is the beginning of a chain */
979 skb_fill_page_desc(rxtop
, 0, buffer_info
->page
,
982 /* this is the middle of a chain */
983 skb_fill_page_desc(rxtop
,
984 skb_shinfo(rxtop
)->nr_frags
,
985 buffer_info
->page
, 0, length
);
986 /* re-use the skb, only consumed the page */
987 buffer_info
->skb
= skb
;
989 e1000_consume_page(buffer_info
, rxtop
, length
);
993 /* end of the chain */
994 skb_fill_page_desc(rxtop
,
995 skb_shinfo(rxtop
)->nr_frags
,
996 buffer_info
->page
, 0, length
);
997 /* re-use the current skb, we only consumed the
999 buffer_info
->skb
= skb
;
1002 e1000_consume_page(buffer_info
, skb
, length
);
1004 /* no chain, got EOP, this buf is the packet
1005 * copybreak to save the put_page/alloc_page */
1006 if (length
<= copybreak
&&
1007 skb_tailroom(skb
) >= length
) {
1009 vaddr
= kmap_atomic(buffer_info
->page
,
1010 KM_SKB_DATA_SOFTIRQ
);
1011 memcpy(skb_tail_pointer(skb
), vaddr
,
1013 kunmap_atomic(vaddr
,
1014 KM_SKB_DATA_SOFTIRQ
);
1015 /* re-use the page, so don't erase
1016 * buffer_info->page */
1017 skb_put(skb
, length
);
1019 skb_fill_page_desc(skb
, 0,
1020 buffer_info
->page
, 0,
1022 e1000_consume_page(buffer_info
, skb
,
1028 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1029 e1000_rx_checksum(adapter
,
1031 ((u32
)(rx_desc
->errors
) << 24),
1032 le16_to_cpu(rx_desc
->csum
), skb
);
1034 /* probably a little skewed due to removing CRC */
1035 total_rx_bytes
+= skb
->len
;
1038 /* eth type trans needs skb->data to point to something */
1039 if (!pskb_may_pull(skb
, ETH_HLEN
)) {
1040 e_err("pskb_may_pull failed.\n");
1045 e1000_receive_skb(adapter
, netdev
, skb
, status
,
1049 rx_desc
->status
= 0;
1051 /* return some buffers to hardware, one at a time is too slow */
1052 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
1053 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
1057 /* use prefetched values */
1059 buffer_info
= next_buffer
;
1061 rx_ring
->next_to_clean
= i
;
1063 cleaned_count
= e1000_desc_unused(rx_ring
);
1065 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
1067 adapter
->total_rx_bytes
+= total_rx_bytes
;
1068 adapter
->total_rx_packets
+= total_rx_packets
;
1069 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
1070 netdev
->stats
.rx_packets
+= total_rx_packets
;
1075 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1076 * @adapter: board private structure
1078 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
)
1080 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1081 struct e1000_buffer
*buffer_info
;
1082 struct e1000_ps_page
*ps_page
;
1083 struct pci_dev
*pdev
= adapter
->pdev
;
1086 /* Free all the Rx ring sk_buffs */
1087 for (i
= 0; i
< rx_ring
->count
; i
++) {
1088 buffer_info
= &rx_ring
->buffer_info
[i
];
1089 if (buffer_info
->dma
) {
1090 if (adapter
->clean_rx
== e1000_clean_rx_irq
)
1091 pci_unmap_single(pdev
, buffer_info
->dma
,
1092 adapter
->rx_buffer_len
,
1093 PCI_DMA_FROMDEVICE
);
1094 else if (adapter
->clean_rx
== e1000_clean_jumbo_rx_irq
)
1095 pci_unmap_page(pdev
, buffer_info
->dma
,
1097 PCI_DMA_FROMDEVICE
);
1098 else if (adapter
->clean_rx
== e1000_clean_rx_irq_ps
)
1099 pci_unmap_single(pdev
, buffer_info
->dma
,
1100 adapter
->rx_ps_bsize0
,
1101 PCI_DMA_FROMDEVICE
);
1102 buffer_info
->dma
= 0;
1105 if (buffer_info
->page
) {
1106 put_page(buffer_info
->page
);
1107 buffer_info
->page
= NULL
;
1110 if (buffer_info
->skb
) {
1111 dev_kfree_skb(buffer_info
->skb
);
1112 buffer_info
->skb
= NULL
;
1115 for (j
= 0; j
< PS_PAGE_BUFFERS
; j
++) {
1116 ps_page
= &buffer_info
->ps_pages
[j
];
1119 pci_unmap_page(pdev
, ps_page
->dma
, PAGE_SIZE
,
1120 PCI_DMA_FROMDEVICE
);
1122 put_page(ps_page
->page
);
1123 ps_page
->page
= NULL
;
1127 /* there also may be some cached data from a chained receive */
1128 if (rx_ring
->rx_skb_top
) {
1129 dev_kfree_skb(rx_ring
->rx_skb_top
);
1130 rx_ring
->rx_skb_top
= NULL
;
1133 /* Zero out the descriptor ring */
1134 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1136 rx_ring
->next_to_clean
= 0;
1137 rx_ring
->next_to_use
= 0;
1138 adapter
->flags2
&= ~FLAG2_IS_DISCARDING
;
1140 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->head
);
1141 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
1144 static void e1000e_downshift_workaround(struct work_struct
*work
)
1146 struct e1000_adapter
*adapter
= container_of(work
,
1147 struct e1000_adapter
, downshift_task
);
1149 e1000e_gig_downshift_workaround_ich8lan(&adapter
->hw
);
1153 * e1000_intr_msi - Interrupt Handler
1154 * @irq: interrupt number
1155 * @data: pointer to a network interface device structure
1157 static irqreturn_t
e1000_intr_msi(int irq
, void *data
)
1159 struct net_device
*netdev
= data
;
1160 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1161 struct e1000_hw
*hw
= &adapter
->hw
;
1162 u32 icr
= er32(ICR
);
1165 * read ICR disables interrupts using IAM
1168 if (icr
& E1000_ICR_LSC
) {
1169 hw
->mac
.get_link_status
= 1;
1171 * ICH8 workaround-- Call gig speed drop workaround on cable
1172 * disconnect (LSC) before accessing any PHY registers
1174 if ((adapter
->flags
& FLAG_LSC_GIG_SPEED_DROP
) &&
1175 (!(er32(STATUS
) & E1000_STATUS_LU
)))
1176 schedule_work(&adapter
->downshift_task
);
1179 * 80003ES2LAN workaround-- For packet buffer work-around on
1180 * link down event; disable receives here in the ISR and reset
1181 * adapter in watchdog
1183 if (netif_carrier_ok(netdev
) &&
1184 adapter
->flags
& FLAG_RX_NEEDS_RESTART
) {
1185 /* disable receives */
1186 u32 rctl
= er32(RCTL
);
1187 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1188 adapter
->flags
|= FLAG_RX_RESTART_NOW
;
1190 /* guard against interrupt when we're going down */
1191 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1192 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1195 if (napi_schedule_prep(&adapter
->napi
)) {
1196 adapter
->total_tx_bytes
= 0;
1197 adapter
->total_tx_packets
= 0;
1198 adapter
->total_rx_bytes
= 0;
1199 adapter
->total_rx_packets
= 0;
1200 __napi_schedule(&adapter
->napi
);
1207 * e1000_intr - Interrupt Handler
1208 * @irq: interrupt number
1209 * @data: pointer to a network interface device structure
1211 static irqreturn_t
e1000_intr(int irq
, void *data
)
1213 struct net_device
*netdev
= data
;
1214 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1215 struct e1000_hw
*hw
= &adapter
->hw
;
1216 u32 rctl
, icr
= er32(ICR
);
1218 if (!icr
|| test_bit(__E1000_DOWN
, &adapter
->state
))
1219 return IRQ_NONE
; /* Not our interrupt */
1222 * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1223 * not set, then the adapter didn't send an interrupt
1225 if (!(icr
& E1000_ICR_INT_ASSERTED
))
1229 * Interrupt Auto-Mask...upon reading ICR,
1230 * interrupts are masked. No need for the
1234 if (icr
& E1000_ICR_LSC
) {
1235 hw
->mac
.get_link_status
= 1;
1237 * ICH8 workaround-- Call gig speed drop workaround on cable
1238 * disconnect (LSC) before accessing any PHY registers
1240 if ((adapter
->flags
& FLAG_LSC_GIG_SPEED_DROP
) &&
1241 (!(er32(STATUS
) & E1000_STATUS_LU
)))
1242 schedule_work(&adapter
->downshift_task
);
1245 * 80003ES2LAN workaround--
1246 * For packet buffer work-around on link down event;
1247 * disable receives here in the ISR and
1248 * reset adapter in watchdog
1250 if (netif_carrier_ok(netdev
) &&
1251 (adapter
->flags
& FLAG_RX_NEEDS_RESTART
)) {
1252 /* disable receives */
1254 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1255 adapter
->flags
|= FLAG_RX_RESTART_NOW
;
1257 /* guard against interrupt when we're going down */
1258 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1259 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1262 if (napi_schedule_prep(&adapter
->napi
)) {
1263 adapter
->total_tx_bytes
= 0;
1264 adapter
->total_tx_packets
= 0;
1265 adapter
->total_rx_bytes
= 0;
1266 adapter
->total_rx_packets
= 0;
1267 __napi_schedule(&adapter
->napi
);
1273 static irqreturn_t
e1000_msix_other(int irq
, void *data
)
1275 struct net_device
*netdev
= data
;
1276 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1277 struct e1000_hw
*hw
= &adapter
->hw
;
1278 u32 icr
= er32(ICR
);
1280 if (!(icr
& E1000_ICR_INT_ASSERTED
)) {
1281 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1282 ew32(IMS
, E1000_IMS_OTHER
);
1286 if (icr
& adapter
->eiac_mask
)
1287 ew32(ICS
, (icr
& adapter
->eiac_mask
));
1289 if (icr
& E1000_ICR_OTHER
) {
1290 if (!(icr
& E1000_ICR_LSC
))
1291 goto no_link_interrupt
;
1292 hw
->mac
.get_link_status
= 1;
1293 /* guard against interrupt when we're going down */
1294 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1295 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1299 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1300 ew32(IMS
, E1000_IMS_LSC
| E1000_IMS_OTHER
);
1306 static irqreturn_t
e1000_intr_msix_tx(int irq
, void *data
)
1308 struct net_device
*netdev
= data
;
1309 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1310 struct e1000_hw
*hw
= &adapter
->hw
;
1311 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1314 adapter
->total_tx_bytes
= 0;
1315 adapter
->total_tx_packets
= 0;
1317 if (!e1000_clean_tx_irq(adapter
))
1318 /* Ring was not completely cleaned, so fire another interrupt */
1319 ew32(ICS
, tx_ring
->ims_val
);
1324 static irqreturn_t
e1000_intr_msix_rx(int irq
, void *data
)
1326 struct net_device
*netdev
= data
;
1327 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1329 /* Write the ITR value calculated at the end of the
1330 * previous interrupt.
1332 if (adapter
->rx_ring
->set_itr
) {
1333 writel(1000000000 / (adapter
->rx_ring
->itr_val
* 256),
1334 adapter
->hw
.hw_addr
+ adapter
->rx_ring
->itr_register
);
1335 adapter
->rx_ring
->set_itr
= 0;
1338 if (napi_schedule_prep(&adapter
->napi
)) {
1339 adapter
->total_rx_bytes
= 0;
1340 adapter
->total_rx_packets
= 0;
1341 __napi_schedule(&adapter
->napi
);
1347 * e1000_configure_msix - Configure MSI-X hardware
1349 * e1000_configure_msix sets up the hardware to properly
1350 * generate MSI-X interrupts.
1352 static void e1000_configure_msix(struct e1000_adapter
*adapter
)
1354 struct e1000_hw
*hw
= &adapter
->hw
;
1355 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1356 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1358 u32 ctrl_ext
, ivar
= 0;
1360 adapter
->eiac_mask
= 0;
1362 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1363 if (hw
->mac
.type
== e1000_82574
) {
1364 u32 rfctl
= er32(RFCTL
);
1365 rfctl
|= E1000_RFCTL_ACK_DIS
;
1369 #define E1000_IVAR_INT_ALLOC_VALID 0x8
1370 /* Configure Rx vector */
1371 rx_ring
->ims_val
= E1000_IMS_RXQ0
;
1372 adapter
->eiac_mask
|= rx_ring
->ims_val
;
1373 if (rx_ring
->itr_val
)
1374 writel(1000000000 / (rx_ring
->itr_val
* 256),
1375 hw
->hw_addr
+ rx_ring
->itr_register
);
1377 writel(1, hw
->hw_addr
+ rx_ring
->itr_register
);
1378 ivar
= E1000_IVAR_INT_ALLOC_VALID
| vector
;
1380 /* Configure Tx vector */
1381 tx_ring
->ims_val
= E1000_IMS_TXQ0
;
1383 if (tx_ring
->itr_val
)
1384 writel(1000000000 / (tx_ring
->itr_val
* 256),
1385 hw
->hw_addr
+ tx_ring
->itr_register
);
1387 writel(1, hw
->hw_addr
+ tx_ring
->itr_register
);
1388 adapter
->eiac_mask
|= tx_ring
->ims_val
;
1389 ivar
|= ((E1000_IVAR_INT_ALLOC_VALID
| vector
) << 8);
1391 /* set vector for Other Causes, e.g. link changes */
1393 ivar
|= ((E1000_IVAR_INT_ALLOC_VALID
| vector
) << 16);
1394 if (rx_ring
->itr_val
)
1395 writel(1000000000 / (rx_ring
->itr_val
* 256),
1396 hw
->hw_addr
+ E1000_EITR_82574(vector
));
1398 writel(1, hw
->hw_addr
+ E1000_EITR_82574(vector
));
1400 /* Cause Tx interrupts on every write back */
1405 /* enable MSI-X PBA support */
1406 ctrl_ext
= er32(CTRL_EXT
);
1407 ctrl_ext
|= E1000_CTRL_EXT_PBA_CLR
;
1409 /* Auto-Mask Other interrupts upon ICR read */
1410 #define E1000_EIAC_MASK_82574 0x01F00000
1411 ew32(IAM
, ~E1000_EIAC_MASK_82574
| E1000_IMS_OTHER
);
1412 ctrl_ext
|= E1000_CTRL_EXT_EIAME
;
1413 ew32(CTRL_EXT
, ctrl_ext
);
1417 void e1000e_reset_interrupt_capability(struct e1000_adapter
*adapter
)
1419 if (adapter
->msix_entries
) {
1420 pci_disable_msix(adapter
->pdev
);
1421 kfree(adapter
->msix_entries
);
1422 adapter
->msix_entries
= NULL
;
1423 } else if (adapter
->flags
& FLAG_MSI_ENABLED
) {
1424 pci_disable_msi(adapter
->pdev
);
1425 adapter
->flags
&= ~FLAG_MSI_ENABLED
;
1432 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1434 * Attempt to configure interrupts using the best available
1435 * capabilities of the hardware and kernel.
1437 void e1000e_set_interrupt_capability(struct e1000_adapter
*adapter
)
1443 switch (adapter
->int_mode
) {
1444 case E1000E_INT_MODE_MSIX
:
1445 if (adapter
->flags
& FLAG_HAS_MSIX
) {
1446 numvecs
= 3; /* RxQ0, TxQ0 and other */
1447 adapter
->msix_entries
= kcalloc(numvecs
,
1448 sizeof(struct msix_entry
),
1450 if (adapter
->msix_entries
) {
1451 for (i
= 0; i
< numvecs
; i
++)
1452 adapter
->msix_entries
[i
].entry
= i
;
1454 err
= pci_enable_msix(adapter
->pdev
,
1455 adapter
->msix_entries
,
1460 /* MSI-X failed, so fall through and try MSI */
1461 e_err("Failed to initialize MSI-X interrupts. "
1462 "Falling back to MSI interrupts.\n");
1463 e1000e_reset_interrupt_capability(adapter
);
1465 adapter
->int_mode
= E1000E_INT_MODE_MSI
;
1467 case E1000E_INT_MODE_MSI
:
1468 if (!pci_enable_msi(adapter
->pdev
)) {
1469 adapter
->flags
|= FLAG_MSI_ENABLED
;
1471 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
1472 e_err("Failed to initialize MSI interrupts. Falling "
1473 "back to legacy interrupts.\n");
1476 case E1000E_INT_MODE_LEGACY
:
1477 /* Don't do anything; this is the system default */
1485 * e1000_request_msix - Initialize MSI-X interrupts
1487 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1490 static int e1000_request_msix(struct e1000_adapter
*adapter
)
1492 struct net_device
*netdev
= adapter
->netdev
;
1493 int err
= 0, vector
= 0;
1495 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5))
1496 sprintf(adapter
->rx_ring
->name
, "%s-rx-0", netdev
->name
);
1498 memcpy(adapter
->rx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1499 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1500 e1000_intr_msix_rx
, 0, adapter
->rx_ring
->name
,
1504 adapter
->rx_ring
->itr_register
= E1000_EITR_82574(vector
);
1505 adapter
->rx_ring
->itr_val
= adapter
->itr
;
1508 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5))
1509 sprintf(adapter
->tx_ring
->name
, "%s-tx-0", netdev
->name
);
1511 memcpy(adapter
->tx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1512 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1513 e1000_intr_msix_tx
, 0, adapter
->tx_ring
->name
,
1517 adapter
->tx_ring
->itr_register
= E1000_EITR_82574(vector
);
1518 adapter
->tx_ring
->itr_val
= adapter
->itr
;
1521 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1522 e1000_msix_other
, 0, netdev
->name
, netdev
);
1526 e1000_configure_msix(adapter
);
1533 * e1000_request_irq - initialize interrupts
1535 * Attempts to configure interrupts using the best available
1536 * capabilities of the hardware and kernel.
1538 static int e1000_request_irq(struct e1000_adapter
*adapter
)
1540 struct net_device
*netdev
= adapter
->netdev
;
1543 if (adapter
->msix_entries
) {
1544 err
= e1000_request_msix(adapter
);
1547 /* fall back to MSI */
1548 e1000e_reset_interrupt_capability(adapter
);
1549 adapter
->int_mode
= E1000E_INT_MODE_MSI
;
1550 e1000e_set_interrupt_capability(adapter
);
1552 if (adapter
->flags
& FLAG_MSI_ENABLED
) {
1553 err
= request_irq(adapter
->pdev
->irq
, e1000_intr_msi
, 0,
1554 netdev
->name
, netdev
);
1558 /* fall back to legacy interrupt */
1559 e1000e_reset_interrupt_capability(adapter
);
1560 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
1563 err
= request_irq(adapter
->pdev
->irq
, e1000_intr
, IRQF_SHARED
,
1564 netdev
->name
, netdev
);
1566 e_err("Unable to allocate interrupt, Error: %d\n", err
);
1571 static void e1000_free_irq(struct e1000_adapter
*adapter
)
1573 struct net_device
*netdev
= adapter
->netdev
;
1575 if (adapter
->msix_entries
) {
1578 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1581 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1584 /* Other Causes interrupt vector */
1585 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1589 free_irq(adapter
->pdev
->irq
, netdev
);
1593 * e1000_irq_disable - Mask off interrupt generation on the NIC
1595 static void e1000_irq_disable(struct e1000_adapter
*adapter
)
1597 struct e1000_hw
*hw
= &adapter
->hw
;
1600 if (adapter
->msix_entries
)
1601 ew32(EIAC_82574
, 0);
1603 synchronize_irq(adapter
->pdev
->irq
);
1607 * e1000_irq_enable - Enable default interrupt generation settings
1609 static void e1000_irq_enable(struct e1000_adapter
*adapter
)
1611 struct e1000_hw
*hw
= &adapter
->hw
;
1613 if (adapter
->msix_entries
) {
1614 ew32(EIAC_82574
, adapter
->eiac_mask
& E1000_EIAC_MASK_82574
);
1615 ew32(IMS
, adapter
->eiac_mask
| E1000_IMS_OTHER
| E1000_IMS_LSC
);
1617 ew32(IMS
, IMS_ENABLE_MASK
);
1623 * e1000_get_hw_control - get control of the h/w from f/w
1624 * @adapter: address of board private structure
1626 * e1000_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1627 * For ASF and Pass Through versions of f/w this means that
1628 * the driver is loaded. For AMT version (only with 82573)
1629 * of the f/w this means that the network i/f is open.
1631 static void e1000_get_hw_control(struct e1000_adapter
*adapter
)
1633 struct e1000_hw
*hw
= &adapter
->hw
;
1637 /* Let firmware know the driver has taken over */
1638 if (adapter
->flags
& FLAG_HAS_SWSM_ON_LOAD
) {
1640 ew32(SWSM
, swsm
| E1000_SWSM_DRV_LOAD
);
1641 } else if (adapter
->flags
& FLAG_HAS_CTRLEXT_ON_LOAD
) {
1642 ctrl_ext
= er32(CTRL_EXT
);
1643 ew32(CTRL_EXT
, ctrl_ext
| E1000_CTRL_EXT_DRV_LOAD
);
1648 * e1000_release_hw_control - release control of the h/w to f/w
1649 * @adapter: address of board private structure
1651 * e1000_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1652 * For ASF and Pass Through versions of f/w this means that the
1653 * driver is no longer loaded. For AMT version (only with 82573) i
1654 * of the f/w this means that the network i/f is closed.
1657 static void e1000_release_hw_control(struct e1000_adapter
*adapter
)
1659 struct e1000_hw
*hw
= &adapter
->hw
;
1663 /* Let firmware taken over control of h/w */
1664 if (adapter
->flags
& FLAG_HAS_SWSM_ON_LOAD
) {
1666 ew32(SWSM
, swsm
& ~E1000_SWSM_DRV_LOAD
);
1667 } else if (adapter
->flags
& FLAG_HAS_CTRLEXT_ON_LOAD
) {
1668 ctrl_ext
= er32(CTRL_EXT
);
1669 ew32(CTRL_EXT
, ctrl_ext
& ~E1000_CTRL_EXT_DRV_LOAD
);
1674 * @e1000_alloc_ring - allocate memory for a ring structure
1676 static int e1000_alloc_ring_dma(struct e1000_adapter
*adapter
,
1677 struct e1000_ring
*ring
)
1679 struct pci_dev
*pdev
= adapter
->pdev
;
1681 ring
->desc
= dma_alloc_coherent(&pdev
->dev
, ring
->size
, &ring
->dma
,
1690 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
1691 * @adapter: board private structure
1693 * Return 0 on success, negative on failure
1695 int e1000e_setup_tx_resources(struct e1000_adapter
*adapter
)
1697 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1698 int err
= -ENOMEM
, size
;
1700 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
1701 tx_ring
->buffer_info
= vmalloc(size
);
1702 if (!tx_ring
->buffer_info
)
1704 memset(tx_ring
->buffer_info
, 0, size
);
1706 /* round up to nearest 4K */
1707 tx_ring
->size
= tx_ring
->count
* sizeof(struct e1000_tx_desc
);
1708 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
1710 err
= e1000_alloc_ring_dma(adapter
, tx_ring
);
1714 tx_ring
->next_to_use
= 0;
1715 tx_ring
->next_to_clean
= 0;
1719 vfree(tx_ring
->buffer_info
);
1720 e_err("Unable to allocate memory for the transmit descriptor ring\n");
1725 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
1726 * @adapter: board private structure
1728 * Returns 0 on success, negative on failure
1730 int e1000e_setup_rx_resources(struct e1000_adapter
*adapter
)
1732 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1733 struct e1000_buffer
*buffer_info
;
1734 int i
, size
, desc_len
, err
= -ENOMEM
;
1736 size
= sizeof(struct e1000_buffer
) * rx_ring
->count
;
1737 rx_ring
->buffer_info
= vmalloc(size
);
1738 if (!rx_ring
->buffer_info
)
1740 memset(rx_ring
->buffer_info
, 0, size
);
1742 for (i
= 0; i
< rx_ring
->count
; i
++) {
1743 buffer_info
= &rx_ring
->buffer_info
[i
];
1744 buffer_info
->ps_pages
= kcalloc(PS_PAGE_BUFFERS
,
1745 sizeof(struct e1000_ps_page
),
1747 if (!buffer_info
->ps_pages
)
1751 desc_len
= sizeof(union e1000_rx_desc_packet_split
);
1753 /* Round up to nearest 4K */
1754 rx_ring
->size
= rx_ring
->count
* desc_len
;
1755 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
1757 err
= e1000_alloc_ring_dma(adapter
, rx_ring
);
1761 rx_ring
->next_to_clean
= 0;
1762 rx_ring
->next_to_use
= 0;
1763 rx_ring
->rx_skb_top
= NULL
;
1768 for (i
= 0; i
< rx_ring
->count
; i
++) {
1769 buffer_info
= &rx_ring
->buffer_info
[i
];
1770 kfree(buffer_info
->ps_pages
);
1773 vfree(rx_ring
->buffer_info
);
1774 e_err("Unable to allocate memory for the transmit descriptor ring\n");
1779 * e1000_clean_tx_ring - Free Tx Buffers
1780 * @adapter: board private structure
1782 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
)
1784 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1785 struct e1000_buffer
*buffer_info
;
1789 for (i
= 0; i
< tx_ring
->count
; i
++) {
1790 buffer_info
= &tx_ring
->buffer_info
[i
];
1791 e1000_put_txbuf(adapter
, buffer_info
);
1794 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
1795 memset(tx_ring
->buffer_info
, 0, size
);
1797 memset(tx_ring
->desc
, 0, tx_ring
->size
);
1799 tx_ring
->next_to_use
= 0;
1800 tx_ring
->next_to_clean
= 0;
1802 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->head
);
1803 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
1807 * e1000e_free_tx_resources - Free Tx Resources per Queue
1808 * @adapter: board private structure
1810 * Free all transmit software resources
1812 void e1000e_free_tx_resources(struct e1000_adapter
*adapter
)
1814 struct pci_dev
*pdev
= adapter
->pdev
;
1815 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1817 e1000_clean_tx_ring(adapter
);
1819 vfree(tx_ring
->buffer_info
);
1820 tx_ring
->buffer_info
= NULL
;
1822 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
1824 tx_ring
->desc
= NULL
;
1828 * e1000e_free_rx_resources - Free Rx Resources
1829 * @adapter: board private structure
1831 * Free all receive software resources
1834 void e1000e_free_rx_resources(struct e1000_adapter
*adapter
)
1836 struct pci_dev
*pdev
= adapter
->pdev
;
1837 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1840 e1000_clean_rx_ring(adapter
);
1842 for (i
= 0; i
< rx_ring
->count
; i
++) {
1843 kfree(rx_ring
->buffer_info
[i
].ps_pages
);
1846 vfree(rx_ring
->buffer_info
);
1847 rx_ring
->buffer_info
= NULL
;
1849 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
1851 rx_ring
->desc
= NULL
;
1855 * e1000_update_itr - update the dynamic ITR value based on statistics
1856 * @adapter: pointer to adapter
1857 * @itr_setting: current adapter->itr
1858 * @packets: the number of packets during this measurement interval
1859 * @bytes: the number of bytes during this measurement interval
1861 * Stores a new ITR value based on packets and byte
1862 * counts during the last interrupt. The advantage of per interrupt
1863 * computation is faster updates and more accurate ITR for the current
1864 * traffic pattern. Constants in this function were computed
1865 * based on theoretical maximum wire speed and thresholds were set based
1866 * on testing data as well as attempting to minimize response time
1867 * while increasing bulk throughput. This functionality is controlled
1868 * by the InterruptThrottleRate module parameter.
1870 static unsigned int e1000_update_itr(struct e1000_adapter
*adapter
,
1871 u16 itr_setting
, int packets
,
1874 unsigned int retval
= itr_setting
;
1877 goto update_itr_done
;
1879 switch (itr_setting
) {
1880 case lowest_latency
:
1881 /* handle TSO and jumbo frames */
1882 if (bytes
/packets
> 8000)
1883 retval
= bulk_latency
;
1884 else if ((packets
< 5) && (bytes
> 512)) {
1885 retval
= low_latency
;
1888 case low_latency
: /* 50 usec aka 20000 ints/s */
1889 if (bytes
> 10000) {
1890 /* this if handles the TSO accounting */
1891 if (bytes
/packets
> 8000) {
1892 retval
= bulk_latency
;
1893 } else if ((packets
< 10) || ((bytes
/packets
) > 1200)) {
1894 retval
= bulk_latency
;
1895 } else if ((packets
> 35)) {
1896 retval
= lowest_latency
;
1898 } else if (bytes
/packets
> 2000) {
1899 retval
= bulk_latency
;
1900 } else if (packets
<= 2 && bytes
< 512) {
1901 retval
= lowest_latency
;
1904 case bulk_latency
: /* 250 usec aka 4000 ints/s */
1905 if (bytes
> 25000) {
1907 retval
= low_latency
;
1909 } else if (bytes
< 6000) {
1910 retval
= low_latency
;
1919 static void e1000_set_itr(struct e1000_adapter
*adapter
)
1921 struct e1000_hw
*hw
= &adapter
->hw
;
1923 u32 new_itr
= adapter
->itr
;
1925 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
1926 if (adapter
->link_speed
!= SPEED_1000
) {
1932 adapter
->tx_itr
= e1000_update_itr(adapter
,
1934 adapter
->total_tx_packets
,
1935 adapter
->total_tx_bytes
);
1936 /* conservative mode (itr 3) eliminates the lowest_latency setting */
1937 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
1938 adapter
->tx_itr
= low_latency
;
1940 adapter
->rx_itr
= e1000_update_itr(adapter
,
1942 adapter
->total_rx_packets
,
1943 adapter
->total_rx_bytes
);
1944 /* conservative mode (itr 3) eliminates the lowest_latency setting */
1945 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
1946 adapter
->rx_itr
= low_latency
;
1948 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
1950 switch (current_itr
) {
1951 /* counts and packets in update_itr are dependent on these numbers */
1952 case lowest_latency
:
1956 new_itr
= 20000; /* aka hwitr = ~200 */
1966 if (new_itr
!= adapter
->itr
) {
1968 * this attempts to bias the interrupt rate towards Bulk
1969 * by adding intermediate steps when interrupt rate is
1972 new_itr
= new_itr
> adapter
->itr
?
1973 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
1975 adapter
->itr
= new_itr
;
1976 adapter
->rx_ring
->itr_val
= new_itr
;
1977 if (adapter
->msix_entries
)
1978 adapter
->rx_ring
->set_itr
= 1;
1980 ew32(ITR
, 1000000000 / (new_itr
* 256));
1985 * e1000_alloc_queues - Allocate memory for all rings
1986 * @adapter: board private structure to initialize
1988 static int __devinit
e1000_alloc_queues(struct e1000_adapter
*adapter
)
1990 adapter
->tx_ring
= kzalloc(sizeof(struct e1000_ring
), GFP_KERNEL
);
1991 if (!adapter
->tx_ring
)
1994 adapter
->rx_ring
= kzalloc(sizeof(struct e1000_ring
), GFP_KERNEL
);
1995 if (!adapter
->rx_ring
)
2000 e_err("Unable to allocate memory for queues\n");
2001 kfree(adapter
->rx_ring
);
2002 kfree(adapter
->tx_ring
);
2007 * e1000_clean - NAPI Rx polling callback
2008 * @napi: struct associated with this polling callback
2009 * @budget: amount of packets driver is allowed to process this poll
2011 static int e1000_clean(struct napi_struct
*napi
, int budget
)
2013 struct e1000_adapter
*adapter
= container_of(napi
, struct e1000_adapter
, napi
);
2014 struct e1000_hw
*hw
= &adapter
->hw
;
2015 struct net_device
*poll_dev
= adapter
->netdev
;
2016 int tx_cleaned
= 1, work_done
= 0;
2018 adapter
= netdev_priv(poll_dev
);
2020 if (adapter
->msix_entries
&&
2021 !(adapter
->rx_ring
->ims_val
& adapter
->tx_ring
->ims_val
))
2024 tx_cleaned
= e1000_clean_tx_irq(adapter
);
2027 adapter
->clean_rx(adapter
, &work_done
, budget
);
2032 /* If budget not fully consumed, exit the polling mode */
2033 if (work_done
< budget
) {
2034 if (adapter
->itr_setting
& 3)
2035 e1000_set_itr(adapter
);
2036 napi_complete(napi
);
2037 if (!test_bit(__E1000_DOWN
, &adapter
->state
)) {
2038 if (adapter
->msix_entries
)
2039 ew32(IMS
, adapter
->rx_ring
->ims_val
);
2041 e1000_irq_enable(adapter
);
2048 static void e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
2050 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2051 struct e1000_hw
*hw
= &adapter
->hw
;
2054 /* don't update vlan cookie if already programmed */
2055 if ((adapter
->hw
.mng_cookie
.status
&
2056 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
2057 (vid
== adapter
->mng_vlan_id
))
2060 /* add VID to filter table */
2061 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2062 index
= (vid
>> 5) & 0x7F;
2063 vfta
= E1000_READ_REG_ARRAY(hw
, E1000_VFTA
, index
);
2064 vfta
|= (1 << (vid
& 0x1F));
2065 hw
->mac
.ops
.write_vfta(hw
, index
, vfta
);
2069 static void e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
2071 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2072 struct e1000_hw
*hw
= &adapter
->hw
;
2075 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2076 e1000_irq_disable(adapter
);
2077 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
2079 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2080 e1000_irq_enable(adapter
);
2082 if ((adapter
->hw
.mng_cookie
.status
&
2083 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
2084 (vid
== adapter
->mng_vlan_id
)) {
2085 /* release control to f/w */
2086 e1000_release_hw_control(adapter
);
2090 /* remove VID from filter table */
2091 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2092 index
= (vid
>> 5) & 0x7F;
2093 vfta
= E1000_READ_REG_ARRAY(hw
, E1000_VFTA
, index
);
2094 vfta
&= ~(1 << (vid
& 0x1F));
2095 hw
->mac
.ops
.write_vfta(hw
, index
, vfta
);
2099 static void e1000_update_mng_vlan(struct e1000_adapter
*adapter
)
2101 struct net_device
*netdev
= adapter
->netdev
;
2102 u16 vid
= adapter
->hw
.mng_cookie
.vlan_id
;
2103 u16 old_vid
= adapter
->mng_vlan_id
;
2105 if (!adapter
->vlgrp
)
2108 if (!vlan_group_get_device(adapter
->vlgrp
, vid
)) {
2109 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
2110 if (adapter
->hw
.mng_cookie
.status
&
2111 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) {
2112 e1000_vlan_rx_add_vid(netdev
, vid
);
2113 adapter
->mng_vlan_id
= vid
;
2116 if ((old_vid
!= (u16
)E1000_MNG_VLAN_NONE
) &&
2118 !vlan_group_get_device(adapter
->vlgrp
, old_vid
))
2119 e1000_vlan_rx_kill_vid(netdev
, old_vid
);
2121 adapter
->mng_vlan_id
= vid
;
2126 static void e1000_vlan_rx_register(struct net_device
*netdev
,
2127 struct vlan_group
*grp
)
2129 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2130 struct e1000_hw
*hw
= &adapter
->hw
;
2133 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2134 e1000_irq_disable(adapter
);
2135 adapter
->vlgrp
= grp
;
2138 /* enable VLAN tag insert/strip */
2140 ctrl
|= E1000_CTRL_VME
;
2143 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2144 /* enable VLAN receive filtering */
2146 rctl
&= ~E1000_RCTL_CFIEN
;
2148 e1000_update_mng_vlan(adapter
);
2151 /* disable VLAN tag insert/strip */
2153 ctrl
&= ~E1000_CTRL_VME
;
2156 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2157 if (adapter
->mng_vlan_id
!=
2158 (u16
)E1000_MNG_VLAN_NONE
) {
2159 e1000_vlan_rx_kill_vid(netdev
,
2160 adapter
->mng_vlan_id
);
2161 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
2166 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2167 e1000_irq_enable(adapter
);
2170 static void e1000_restore_vlan(struct e1000_adapter
*adapter
)
2174 e1000_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2176 if (!adapter
->vlgrp
)
2179 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2180 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
2182 e1000_vlan_rx_add_vid(adapter
->netdev
, vid
);
2186 static void e1000_init_manageability(struct e1000_adapter
*adapter
)
2188 struct e1000_hw
*hw
= &adapter
->hw
;
2191 if (!(adapter
->flags
& FLAG_MNG_PT_ENABLED
))
2197 * enable receiving management packets to the host. this will probably
2198 * generate destination unreachable messages from the host OS, but
2199 * the packets will be handled on SMBUS
2201 manc
|= E1000_MANC_EN_MNG2HOST
;
2202 manc2h
= er32(MANC2H
);
2203 #define E1000_MNG2HOST_PORT_623 (1 << 5)
2204 #define E1000_MNG2HOST_PORT_664 (1 << 6)
2205 manc2h
|= E1000_MNG2HOST_PORT_623
;
2206 manc2h
|= E1000_MNG2HOST_PORT_664
;
2207 ew32(MANC2H
, manc2h
);
2212 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
2213 * @adapter: board private structure
2215 * Configure the Tx unit of the MAC after a reset.
2217 static void e1000_configure_tx(struct e1000_adapter
*adapter
)
2219 struct e1000_hw
*hw
= &adapter
->hw
;
2220 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
2222 u32 tdlen
, tctl
, tipg
, tarc
;
2225 /* Setup the HW Tx Head and Tail descriptor pointers */
2226 tdba
= tx_ring
->dma
;
2227 tdlen
= tx_ring
->count
* sizeof(struct e1000_tx_desc
);
2228 ew32(TDBAL
, (tdba
& DMA_BIT_MASK(32)));
2229 ew32(TDBAH
, (tdba
>> 32));
2233 tx_ring
->head
= E1000_TDH
;
2234 tx_ring
->tail
= E1000_TDT
;
2236 /* Set the default values for the Tx Inter Packet Gap timer */
2237 tipg
= DEFAULT_82543_TIPG_IPGT_COPPER
; /* 8 */
2238 ipgr1
= DEFAULT_82543_TIPG_IPGR1
; /* 8 */
2239 ipgr2
= DEFAULT_82543_TIPG_IPGR2
; /* 6 */
2241 if (adapter
->flags
& FLAG_TIPG_MEDIUM_FOR_80003ESLAN
)
2242 ipgr2
= DEFAULT_80003ES2LAN_TIPG_IPGR2
; /* 7 */
2244 tipg
|= ipgr1
<< E1000_TIPG_IPGR1_SHIFT
;
2245 tipg
|= ipgr2
<< E1000_TIPG_IPGR2_SHIFT
;
2248 /* Set the Tx Interrupt Delay register */
2249 ew32(TIDV
, adapter
->tx_int_delay
);
2250 /* Tx irq moderation */
2251 ew32(TADV
, adapter
->tx_abs_int_delay
);
2253 /* Program the Transmit Control Register */
2255 tctl
&= ~E1000_TCTL_CT
;
2256 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
2257 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
2259 if (adapter
->flags
& FLAG_TARC_SPEED_MODE_BIT
) {
2260 tarc
= er32(TARC(0));
2262 * set the speed mode bit, we'll clear it if we're not at
2263 * gigabit link later
2265 #define SPEED_MODE_BIT (1 << 21)
2266 tarc
|= SPEED_MODE_BIT
;
2267 ew32(TARC(0), tarc
);
2270 /* errata: program both queues to unweighted RR */
2271 if (adapter
->flags
& FLAG_TARC_SET_BIT_ZERO
) {
2272 tarc
= er32(TARC(0));
2274 ew32(TARC(0), tarc
);
2275 tarc
= er32(TARC(1));
2277 ew32(TARC(1), tarc
);
2280 /* Setup Transmit Descriptor Settings for eop descriptor */
2281 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_IFCS
;
2283 /* only set IDE if we are delaying interrupts using the timers */
2284 if (adapter
->tx_int_delay
)
2285 adapter
->txd_cmd
|= E1000_TXD_CMD_IDE
;
2287 /* enable Report Status bit */
2288 adapter
->txd_cmd
|= E1000_TXD_CMD_RS
;
2292 e1000e_config_collision_dist(hw
);
2296 * e1000_setup_rctl - configure the receive control registers
2297 * @adapter: Board private structure
2299 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2300 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2301 static void e1000_setup_rctl(struct e1000_adapter
*adapter
)
2303 struct e1000_hw
*hw
= &adapter
->hw
;
2308 /* Program MC offset vector base */
2310 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
2311 rctl
|= E1000_RCTL_EN
| E1000_RCTL_BAM
|
2312 E1000_RCTL_LBM_NO
| E1000_RCTL_RDMTS_HALF
|
2313 (adapter
->hw
.mac
.mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
2315 /* Do not Store bad packets */
2316 rctl
&= ~E1000_RCTL_SBP
;
2318 /* Enable Long Packet receive */
2319 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
2320 rctl
&= ~E1000_RCTL_LPE
;
2322 rctl
|= E1000_RCTL_LPE
;
2324 /* Some systems expect that the CRC is included in SMBUS traffic. The
2325 * hardware strips the CRC before sending to both SMBUS (BMC) and to
2326 * host memory when this is enabled
2328 if (adapter
->flags2
& FLAG2_CRC_STRIPPING
)
2329 rctl
|= E1000_RCTL_SECRC
;
2331 /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2332 if ((hw
->phy
.type
== e1000_phy_82577
) && (rctl
& E1000_RCTL_LPE
)) {
2335 e1e_rphy(hw
, PHY_REG(770, 26), &phy_data
);
2337 phy_data
|= (1 << 2);
2338 e1e_wphy(hw
, PHY_REG(770, 26), phy_data
);
2340 e1e_rphy(hw
, 22, &phy_data
);
2342 phy_data
|= (1 << 14);
2343 e1e_wphy(hw
, 0x10, 0x2823);
2344 e1e_wphy(hw
, 0x11, 0x0003);
2345 e1e_wphy(hw
, 22, phy_data
);
2348 /* Setup buffer sizes */
2349 rctl
&= ~E1000_RCTL_SZ_4096
;
2350 rctl
|= E1000_RCTL_BSEX
;
2351 switch (adapter
->rx_buffer_len
) {
2354 rctl
|= E1000_RCTL_SZ_2048
;
2355 rctl
&= ~E1000_RCTL_BSEX
;
2358 rctl
|= E1000_RCTL_SZ_4096
;
2361 rctl
|= E1000_RCTL_SZ_8192
;
2364 rctl
|= E1000_RCTL_SZ_16384
;
2369 * 82571 and greater support packet-split where the protocol
2370 * header is placed in skb->data and the packet data is
2371 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2372 * In the case of a non-split, skb->data is linearly filled,
2373 * followed by the page buffers. Therefore, skb->data is
2374 * sized to hold the largest protocol header.
2376 * allocations using alloc_page take too long for regular MTU
2377 * so only enable packet split for jumbo frames
2379 * Using pages when the page size is greater than 16k wastes
2380 * a lot of memory, since we allocate 3 pages at all times
2383 pages
= PAGE_USE_COUNT(adapter
->netdev
->mtu
);
2384 if (!(adapter
->flags
& FLAG_IS_ICH
) && (pages
<= 3) &&
2385 (PAGE_SIZE
<= 16384) && (rctl
& E1000_RCTL_LPE
))
2386 adapter
->rx_ps_pages
= pages
;
2388 adapter
->rx_ps_pages
= 0;
2390 if (adapter
->rx_ps_pages
) {
2391 /* Configure extra packet-split registers */
2392 rfctl
= er32(RFCTL
);
2393 rfctl
|= E1000_RFCTL_EXTEN
;
2395 * disable packet split support for IPv6 extension headers,
2396 * because some malformed IPv6 headers can hang the Rx
2398 rfctl
|= (E1000_RFCTL_IPV6_EX_DIS
|
2399 E1000_RFCTL_NEW_IPV6_EXT_DIS
);
2403 /* Enable Packet split descriptors */
2404 rctl
|= E1000_RCTL_DTYP_PS
;
2406 psrctl
|= adapter
->rx_ps_bsize0
>>
2407 E1000_PSRCTL_BSIZE0_SHIFT
;
2409 switch (adapter
->rx_ps_pages
) {
2411 psrctl
|= PAGE_SIZE
<<
2412 E1000_PSRCTL_BSIZE3_SHIFT
;
2414 psrctl
|= PAGE_SIZE
<<
2415 E1000_PSRCTL_BSIZE2_SHIFT
;
2417 psrctl
|= PAGE_SIZE
>>
2418 E1000_PSRCTL_BSIZE1_SHIFT
;
2422 ew32(PSRCTL
, psrctl
);
2426 /* just started the receive unit, no need to restart */
2427 adapter
->flags
&= ~FLAG_RX_RESTART_NOW
;
2431 * e1000_configure_rx - Configure Receive Unit after Reset
2432 * @adapter: board private structure
2434 * Configure the Rx unit of the MAC after a reset.
2436 static void e1000_configure_rx(struct e1000_adapter
*adapter
)
2438 struct e1000_hw
*hw
= &adapter
->hw
;
2439 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
2441 u32 rdlen
, rctl
, rxcsum
, ctrl_ext
;
2443 if (adapter
->rx_ps_pages
) {
2444 /* this is a 32 byte descriptor */
2445 rdlen
= rx_ring
->count
*
2446 sizeof(union e1000_rx_desc_packet_split
);
2447 adapter
->clean_rx
= e1000_clean_rx_irq_ps
;
2448 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers_ps
;
2449 } else if (adapter
->netdev
->mtu
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
2450 rdlen
= rx_ring
->count
* sizeof(struct e1000_rx_desc
);
2451 adapter
->clean_rx
= e1000_clean_jumbo_rx_irq
;
2452 adapter
->alloc_rx_buf
= e1000_alloc_jumbo_rx_buffers
;
2454 rdlen
= rx_ring
->count
* sizeof(struct e1000_rx_desc
);
2455 adapter
->clean_rx
= e1000_clean_rx_irq
;
2456 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers
;
2459 /* disable receives while setting up the descriptors */
2461 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
2465 /* set the Receive Delay Timer Register */
2466 ew32(RDTR
, adapter
->rx_int_delay
);
2468 /* irq moderation */
2469 ew32(RADV
, adapter
->rx_abs_int_delay
);
2470 if (adapter
->itr_setting
!= 0)
2471 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
2473 ctrl_ext
= er32(CTRL_EXT
);
2474 /* Auto-Mask interrupts upon ICR access */
2475 ctrl_ext
|= E1000_CTRL_EXT_IAME
;
2476 ew32(IAM
, 0xffffffff);
2477 ew32(CTRL_EXT
, ctrl_ext
);
2481 * Setup the HW Rx Head and Tail Descriptor Pointers and
2482 * the Base and Length of the Rx Descriptor Ring
2484 rdba
= rx_ring
->dma
;
2485 ew32(RDBAL
, (rdba
& DMA_BIT_MASK(32)));
2486 ew32(RDBAH
, (rdba
>> 32));
2490 rx_ring
->head
= E1000_RDH
;
2491 rx_ring
->tail
= E1000_RDT
;
2493 /* Enable Receive Checksum Offload for TCP and UDP */
2494 rxcsum
= er32(RXCSUM
);
2495 if (adapter
->flags
& FLAG_RX_CSUM_ENABLED
) {
2496 rxcsum
|= E1000_RXCSUM_TUOFL
;
2499 * IPv4 payload checksum for UDP fragments must be
2500 * used in conjunction with packet-split.
2502 if (adapter
->rx_ps_pages
)
2503 rxcsum
|= E1000_RXCSUM_IPPCSE
;
2505 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
2506 /* no need to clear IPPCSE as it defaults to 0 */
2508 ew32(RXCSUM
, rxcsum
);
2511 * Enable early receives on supported devices, only takes effect when
2512 * packet size is equal or larger than the specified value (in 8 byte
2513 * units), e.g. using jumbo frames when setting to E1000_ERT_2048
2515 if (adapter
->flags
& FLAG_HAS_ERT
) {
2516 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
2517 u32 rxdctl
= er32(RXDCTL(0));
2518 ew32(RXDCTL(0), rxdctl
| 0x3);
2519 ew32(ERT
, E1000_ERT_2048
| (1 << 13));
2521 * With jumbo frames and early-receive enabled,
2522 * excessive C-state transition latencies result in
2523 * dropped transactions.
2525 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY
,
2526 adapter
->netdev
->name
, 55);
2528 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY
,
2529 adapter
->netdev
->name
,
2530 PM_QOS_DEFAULT_VALUE
);
2534 /* Enable Receives */
2539 * e1000_update_mc_addr_list - Update Multicast addresses
2540 * @hw: pointer to the HW structure
2541 * @mc_addr_list: array of multicast addresses to program
2542 * @mc_addr_count: number of multicast addresses to program
2544 * Updates the Multicast Table Array.
2545 * The caller must have a packed mc_addr_list of multicast addresses.
2547 static void e1000_update_mc_addr_list(struct e1000_hw
*hw
, u8
*mc_addr_list
,
2550 hw
->mac
.ops
.update_mc_addr_list(hw
, mc_addr_list
, mc_addr_count
);
2554 * e1000_set_multi - Multicast and Promiscuous mode set
2555 * @netdev: network interface device structure
2557 * The set_multi entry point is called whenever the multicast address
2558 * list or the network interface flags are updated. This routine is
2559 * responsible for configuring the hardware for proper multicast,
2560 * promiscuous mode, and all-multi behavior.
2562 static void e1000_set_multi(struct net_device
*netdev
)
2564 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2565 struct e1000_hw
*hw
= &adapter
->hw
;
2566 struct dev_mc_list
*mc_ptr
;
2571 /* Check for Promiscuous and All Multicast modes */
2575 if (netdev
->flags
& IFF_PROMISC
) {
2576 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2577 rctl
&= ~E1000_RCTL_VFE
;
2579 if (netdev
->flags
& IFF_ALLMULTI
) {
2580 rctl
|= E1000_RCTL_MPE
;
2581 rctl
&= ~E1000_RCTL_UPE
;
2583 rctl
&= ~(E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2585 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
)
2586 rctl
|= E1000_RCTL_VFE
;
2591 if (!netdev_mc_empty(netdev
)) {
2592 mta_list
= kmalloc(netdev_mc_count(netdev
) * 6, GFP_ATOMIC
);
2596 /* prepare a packed array of only addresses. */
2598 netdev_for_each_mc_addr(mc_ptr
, netdev
)
2599 memcpy(mta_list
+ (i
++ * ETH_ALEN
),
2600 mc_ptr
->dmi_addr
, ETH_ALEN
);
2602 e1000_update_mc_addr_list(hw
, mta_list
, i
);
2606 * if we're called from probe, we might not have
2607 * anything to do here, so clear out the list
2609 e1000_update_mc_addr_list(hw
, NULL
, 0);
2614 * e1000_configure - configure the hardware for Rx and Tx
2615 * @adapter: private board structure
2617 static void e1000_configure(struct e1000_adapter
*adapter
)
2619 e1000_set_multi(adapter
->netdev
);
2621 e1000_restore_vlan(adapter
);
2622 e1000_init_manageability(adapter
);
2624 e1000_configure_tx(adapter
);
2625 e1000_setup_rctl(adapter
);
2626 e1000_configure_rx(adapter
);
2627 adapter
->alloc_rx_buf(adapter
, e1000_desc_unused(adapter
->rx_ring
));
2631 * e1000e_power_up_phy - restore link in case the phy was powered down
2632 * @adapter: address of board private structure
2634 * The phy may be powered down to save power and turn off link when the
2635 * driver is unloaded and wake on lan is not enabled (among others)
2636 * *** this routine MUST be followed by a call to e1000e_reset ***
2638 void e1000e_power_up_phy(struct e1000_adapter
*adapter
)
2640 if (adapter
->hw
.phy
.ops
.power_up
)
2641 adapter
->hw
.phy
.ops
.power_up(&adapter
->hw
);
2643 adapter
->hw
.mac
.ops
.setup_link(&adapter
->hw
);
2647 * e1000_power_down_phy - Power down the PHY
2649 * Power down the PHY so no link is implied when interface is down.
2650 * The PHY cannot be powered down if management or WoL is active.
2652 static void e1000_power_down_phy(struct e1000_adapter
*adapter
)
2654 /* WoL is enabled */
2658 if (adapter
->hw
.phy
.ops
.power_down
)
2659 adapter
->hw
.phy
.ops
.power_down(&adapter
->hw
);
2663 * e1000e_reset - bring the hardware into a known good state
2665 * This function boots the hardware and enables some settings that
2666 * require a configuration cycle of the hardware - those cannot be
2667 * set/changed during runtime. After reset the device needs to be
2668 * properly configured for Rx, Tx etc.
2670 void e1000e_reset(struct e1000_adapter
*adapter
)
2672 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
2673 struct e1000_fc_info
*fc
= &adapter
->hw
.fc
;
2674 struct e1000_hw
*hw
= &adapter
->hw
;
2675 u32 tx_space
, min_tx_space
, min_rx_space
;
2676 u32 pba
= adapter
->pba
;
2679 /* reset Packet Buffer Allocation to default */
2682 if (adapter
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
2684 * To maintain wire speed transmits, the Tx FIFO should be
2685 * large enough to accommodate two full transmit packets,
2686 * rounded up to the next 1KB and expressed in KB. Likewise,
2687 * the Rx FIFO should be large enough to accommodate at least
2688 * one full receive packet and is similarly rounded up and
2692 /* upper 16 bits has Tx packet buffer allocation size in KB */
2693 tx_space
= pba
>> 16;
2694 /* lower 16 bits has Rx packet buffer allocation size in KB */
2697 * the Tx fifo also stores 16 bytes of information about the tx
2698 * but don't include ethernet FCS because hardware appends it
2700 min_tx_space
= (adapter
->max_frame_size
+
2701 sizeof(struct e1000_tx_desc
) -
2703 min_tx_space
= ALIGN(min_tx_space
, 1024);
2704 min_tx_space
>>= 10;
2705 /* software strips receive CRC, so leave room for it */
2706 min_rx_space
= adapter
->max_frame_size
;
2707 min_rx_space
= ALIGN(min_rx_space
, 1024);
2708 min_rx_space
>>= 10;
2711 * If current Tx allocation is less than the min Tx FIFO size,
2712 * and the min Tx FIFO size is less than the current Rx FIFO
2713 * allocation, take space away from current Rx allocation
2715 if ((tx_space
< min_tx_space
) &&
2716 ((min_tx_space
- tx_space
) < pba
)) {
2717 pba
-= min_tx_space
- tx_space
;
2720 * if short on Rx space, Rx wins and must trump tx
2721 * adjustment or use Early Receive if available
2723 if ((pba
< min_rx_space
) &&
2724 (!(adapter
->flags
& FLAG_HAS_ERT
)))
2725 /* ERT enabled in e1000_configure_rx */
2734 * flow control settings
2736 * The high water mark must be low enough to fit one full frame
2737 * (or the size used for early receive) above it in the Rx FIFO.
2738 * Set it to the lower of:
2739 * - 90% of the Rx FIFO size, and
2740 * - the full Rx FIFO size minus the early receive size (for parts
2741 * with ERT support assuming ERT set to E1000_ERT_2048), or
2742 * - the full Rx FIFO size minus one full frame
2744 if (hw
->mac
.type
== e1000_pchlan
) {
2746 * Workaround PCH LOM adapter hangs with certain network
2747 * loads. If hangs persist, try disabling Tx flow control.
2749 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
2750 fc
->high_water
= 0x3500;
2751 fc
->low_water
= 0x1500;
2753 fc
->high_water
= 0x5000;
2754 fc
->low_water
= 0x3000;
2757 if ((adapter
->flags
& FLAG_HAS_ERT
) &&
2758 (adapter
->netdev
->mtu
> ETH_DATA_LEN
))
2759 hwm
= min(((pba
<< 10) * 9 / 10),
2760 ((pba
<< 10) - (E1000_ERT_2048
<< 3)));
2762 hwm
= min(((pba
<< 10) * 9 / 10),
2763 ((pba
<< 10) - adapter
->max_frame_size
));
2765 fc
->high_water
= hwm
& E1000_FCRTH_RTH
; /* 8-byte granularity */
2766 fc
->low_water
= fc
->high_water
- 8;
2769 if (adapter
->flags
& FLAG_DISABLE_FC_PAUSE_TIME
)
2770 fc
->pause_time
= 0xFFFF;
2772 fc
->pause_time
= E1000_FC_PAUSE_TIME
;
2774 fc
->current_mode
= fc
->requested_mode
;
2776 /* Allow time for pending master requests to run */
2777 mac
->ops
.reset_hw(hw
);
2780 * For parts with AMT enabled, let the firmware know
2781 * that the network interface is in control
2783 if (adapter
->flags
& FLAG_HAS_AMT
)
2784 e1000_get_hw_control(adapter
);
2787 if (adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
)
2788 e1e_wphy(&adapter
->hw
, BM_WUC
, 0);
2790 if (mac
->ops
.init_hw(hw
))
2791 e_err("Hardware Error\n");
2793 /* additional part of the flow-control workaround above */
2794 if (hw
->mac
.type
== e1000_pchlan
)
2795 ew32(FCRTV_PCH
, 0x1000);
2797 e1000_update_mng_vlan(adapter
);
2799 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
2800 ew32(VET
, ETH_P_8021Q
);
2802 e1000e_reset_adaptive(hw
);
2803 e1000_get_phy_info(hw
);
2805 if ((adapter
->flags
& FLAG_HAS_SMART_POWER_DOWN
) &&
2806 !(adapter
->flags
& FLAG_SMART_POWER_DOWN
)) {
2809 * speed up time to link by disabling smart power down, ignore
2810 * the return value of this function because there is nothing
2811 * different we would do if it failed
2813 e1e_rphy(hw
, IGP02E1000_PHY_POWER_MGMT
, &phy_data
);
2814 phy_data
&= ~IGP02E1000_PM_SPD
;
2815 e1e_wphy(hw
, IGP02E1000_PHY_POWER_MGMT
, phy_data
);
2819 int e1000e_up(struct e1000_adapter
*adapter
)
2821 struct e1000_hw
*hw
= &adapter
->hw
;
2823 /* DMA latency requirement to workaround early-receive/jumbo issue */
2824 if (adapter
->flags
& FLAG_HAS_ERT
)
2825 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY
,
2826 adapter
->netdev
->name
,
2827 PM_QOS_DEFAULT_VALUE
);
2829 /* hardware has been reset, we need to reload some things */
2830 e1000_configure(adapter
);
2832 clear_bit(__E1000_DOWN
, &adapter
->state
);
2834 napi_enable(&adapter
->napi
);
2835 if (adapter
->msix_entries
)
2836 e1000_configure_msix(adapter
);
2837 e1000_irq_enable(adapter
);
2839 netif_wake_queue(adapter
->netdev
);
2841 /* fire a link change interrupt to start the watchdog */
2842 ew32(ICS
, E1000_ICS_LSC
);
2846 void e1000e_down(struct e1000_adapter
*adapter
)
2848 struct net_device
*netdev
= adapter
->netdev
;
2849 struct e1000_hw
*hw
= &adapter
->hw
;
2853 * signal that we're down so the interrupt handler does not
2854 * reschedule our watchdog timer
2856 set_bit(__E1000_DOWN
, &adapter
->state
);
2858 /* disable receives in the hardware */
2860 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
2861 /* flush and sleep below */
2863 netif_stop_queue(netdev
);
2865 /* disable transmits in the hardware */
2867 tctl
&= ~E1000_TCTL_EN
;
2869 /* flush both disables and wait for them to finish */
2873 napi_disable(&adapter
->napi
);
2874 e1000_irq_disable(adapter
);
2876 del_timer_sync(&adapter
->watchdog_timer
);
2877 del_timer_sync(&adapter
->phy_info_timer
);
2879 netif_carrier_off(netdev
);
2880 adapter
->link_speed
= 0;
2881 adapter
->link_duplex
= 0;
2883 if (!pci_channel_offline(adapter
->pdev
))
2884 e1000e_reset(adapter
);
2885 e1000_clean_tx_ring(adapter
);
2886 e1000_clean_rx_ring(adapter
);
2888 if (adapter
->flags
& FLAG_HAS_ERT
)
2889 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY
,
2890 adapter
->netdev
->name
);
2893 * TODO: for power management, we could drop the link and
2894 * pci_disable_device here.
2898 void e1000e_reinit_locked(struct e1000_adapter
*adapter
)
2901 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->state
))
2903 e1000e_down(adapter
);
2905 clear_bit(__E1000_RESETTING
, &adapter
->state
);
2909 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
2910 * @adapter: board private structure to initialize
2912 * e1000_sw_init initializes the Adapter private data structure.
2913 * Fields are initialized based on PCI device information and
2914 * OS network device settings (MTU size).
2916 static int __devinit
e1000_sw_init(struct e1000_adapter
*adapter
)
2918 struct net_device
*netdev
= adapter
->netdev
;
2920 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
;
2921 adapter
->rx_ps_bsize0
= 128;
2922 adapter
->max_frame_size
= netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
2923 adapter
->min_frame_size
= ETH_ZLEN
+ ETH_FCS_LEN
;
2925 e1000e_set_interrupt_capability(adapter
);
2927 if (e1000_alloc_queues(adapter
))
2930 /* Explicitly disable IRQ since the NIC can be in any state. */
2931 e1000_irq_disable(adapter
);
2933 set_bit(__E1000_DOWN
, &adapter
->state
);
2938 * e1000_intr_msi_test - Interrupt Handler
2939 * @irq: interrupt number
2940 * @data: pointer to a network interface device structure
2942 static irqreturn_t
e1000_intr_msi_test(int irq
, void *data
)
2944 struct net_device
*netdev
= data
;
2945 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2946 struct e1000_hw
*hw
= &adapter
->hw
;
2947 u32 icr
= er32(ICR
);
2949 e_dbg("icr is %08X\n", icr
);
2950 if (icr
& E1000_ICR_RXSEQ
) {
2951 adapter
->flags
&= ~FLAG_MSI_TEST_FAILED
;
2959 * e1000_test_msi_interrupt - Returns 0 for successful test
2960 * @adapter: board private struct
2962 * code flow taken from tg3.c
2964 static int e1000_test_msi_interrupt(struct e1000_adapter
*adapter
)
2966 struct net_device
*netdev
= adapter
->netdev
;
2967 struct e1000_hw
*hw
= &adapter
->hw
;
2970 /* poll_enable hasn't been called yet, so don't need disable */
2971 /* clear any pending events */
2974 /* free the real vector and request a test handler */
2975 e1000_free_irq(adapter
);
2976 e1000e_reset_interrupt_capability(adapter
);
2978 /* Assume that the test fails, if it succeeds then the test
2979 * MSI irq handler will unset this flag */
2980 adapter
->flags
|= FLAG_MSI_TEST_FAILED
;
2982 err
= pci_enable_msi(adapter
->pdev
);
2984 goto msi_test_failed
;
2986 err
= request_irq(adapter
->pdev
->irq
, e1000_intr_msi_test
, 0,
2987 netdev
->name
, netdev
);
2989 pci_disable_msi(adapter
->pdev
);
2990 goto msi_test_failed
;
2995 e1000_irq_enable(adapter
);
2997 /* fire an unusual interrupt on the test handler */
2998 ew32(ICS
, E1000_ICS_RXSEQ
);
3002 e1000_irq_disable(adapter
);
3006 if (adapter
->flags
& FLAG_MSI_TEST_FAILED
) {
3007 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
3009 e_info("MSI interrupt test failed!\n");
3012 free_irq(adapter
->pdev
->irq
, netdev
);
3013 pci_disable_msi(adapter
->pdev
);
3016 goto msi_test_failed
;
3018 /* okay so the test worked, restore settings */
3019 e_dbg("MSI interrupt test succeeded!\n");
3021 e1000e_set_interrupt_capability(adapter
);
3022 e1000_request_irq(adapter
);
3027 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3028 * @adapter: board private struct
3030 * code flow taken from tg3.c, called with e1000 interrupts disabled.
3032 static int e1000_test_msi(struct e1000_adapter
*adapter
)
3037 if (!(adapter
->flags
& FLAG_MSI_ENABLED
))
3040 /* disable SERR in case the MSI write causes a master abort */
3041 pci_read_config_word(adapter
->pdev
, PCI_COMMAND
, &pci_cmd
);
3042 pci_write_config_word(adapter
->pdev
, PCI_COMMAND
,
3043 pci_cmd
& ~PCI_COMMAND_SERR
);
3045 err
= e1000_test_msi_interrupt(adapter
);
3047 /* restore previous setting of command word */
3048 pci_write_config_word(adapter
->pdev
, PCI_COMMAND
, pci_cmd
);
3054 /* EIO means MSI test failed */
3058 /* back to INTx mode */
3059 e_warn("MSI interrupt test failed, using legacy interrupt.\n");
3061 e1000_free_irq(adapter
);
3063 err
= e1000_request_irq(adapter
);
3069 * e1000_open - Called when a network interface is made active
3070 * @netdev: network interface device structure
3072 * Returns 0 on success, negative value on failure
3074 * The open entry point is called when a network interface is made
3075 * active by the system (IFF_UP). At this point all resources needed
3076 * for transmit and receive operations are allocated, the interrupt
3077 * handler is registered with the OS, the watchdog timer is started,
3078 * and the stack is notified that the interface is ready.
3080 static int e1000_open(struct net_device
*netdev
)
3082 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3083 struct e1000_hw
*hw
= &adapter
->hw
;
3086 /* disallow open during test */
3087 if (test_bit(__E1000_TESTING
, &adapter
->state
))
3090 netif_carrier_off(netdev
);
3092 /* allocate transmit descriptors */
3093 err
= e1000e_setup_tx_resources(adapter
);
3097 /* allocate receive descriptors */
3098 err
= e1000e_setup_rx_resources(adapter
);
3102 e1000e_power_up_phy(adapter
);
3104 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
3105 if ((adapter
->hw
.mng_cookie
.status
&
3106 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
))
3107 e1000_update_mng_vlan(adapter
);
3110 * If AMT is enabled, let the firmware know that the network
3111 * interface is now open
3113 if (adapter
->flags
& FLAG_HAS_AMT
)
3114 e1000_get_hw_control(adapter
);
3117 * before we allocate an interrupt, we must be ready to handle it.
3118 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3119 * as soon as we call pci_request_irq, so we have to setup our
3120 * clean_rx handler before we do so.
3122 e1000_configure(adapter
);
3124 err
= e1000_request_irq(adapter
);
3129 * Work around PCIe errata with MSI interrupts causing some chipsets to
3130 * ignore e1000e MSI messages, which means we need to test our MSI
3133 if (adapter
->int_mode
!= E1000E_INT_MODE_LEGACY
) {
3134 err
= e1000_test_msi(adapter
);
3136 e_err("Interrupt allocation failed\n");
3141 /* From here on the code is the same as e1000e_up() */
3142 clear_bit(__E1000_DOWN
, &adapter
->state
);
3144 napi_enable(&adapter
->napi
);
3146 e1000_irq_enable(adapter
);
3148 netif_start_queue(netdev
);
3150 /* fire a link status change interrupt to start the watchdog */
3151 ew32(ICS
, E1000_ICS_LSC
);
3156 e1000_release_hw_control(adapter
);
3157 e1000_power_down_phy(adapter
);
3158 e1000e_free_rx_resources(adapter
);
3160 e1000e_free_tx_resources(adapter
);
3162 e1000e_reset(adapter
);
3168 * e1000_close - Disables a network interface
3169 * @netdev: network interface device structure
3171 * Returns 0, this is not allowed to fail
3173 * The close entry point is called when an interface is de-activated
3174 * by the OS. The hardware is still under the drivers control, but
3175 * needs to be disabled. A global MAC reset is issued to stop the
3176 * hardware, and all transmit and receive resources are freed.
3178 static int e1000_close(struct net_device
*netdev
)
3180 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3182 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->state
));
3183 e1000e_down(adapter
);
3184 e1000_power_down_phy(adapter
);
3185 e1000_free_irq(adapter
);
3187 e1000e_free_tx_resources(adapter
);
3188 e1000e_free_rx_resources(adapter
);
3191 * kill manageability vlan ID if supported, but not if a vlan with
3192 * the same ID is registered on the host OS (let 8021q kill it)
3194 if ((adapter
->hw
.mng_cookie
.status
&
3195 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
3197 vlan_group_get_device(adapter
->vlgrp
, adapter
->mng_vlan_id
)))
3198 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
3201 * If AMT is enabled, let the firmware know that the network
3202 * interface is now closed
3204 if (adapter
->flags
& FLAG_HAS_AMT
)
3205 e1000_release_hw_control(adapter
);
3210 * e1000_set_mac - Change the Ethernet Address of the NIC
3211 * @netdev: network interface device structure
3212 * @p: pointer to an address structure
3214 * Returns 0 on success, negative on failure
3216 static int e1000_set_mac(struct net_device
*netdev
, void *p
)
3218 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3219 struct sockaddr
*addr
= p
;
3221 if (!is_valid_ether_addr(addr
->sa_data
))
3222 return -EADDRNOTAVAIL
;
3224 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
3225 memcpy(adapter
->hw
.mac
.addr
, addr
->sa_data
, netdev
->addr_len
);
3227 e1000e_rar_set(&adapter
->hw
, adapter
->hw
.mac
.addr
, 0);
3229 if (adapter
->flags
& FLAG_RESET_OVERWRITES_LAA
) {
3230 /* activate the work around */
3231 e1000e_set_laa_state_82571(&adapter
->hw
, 1);
3234 * Hold a copy of the LAA in RAR[14] This is done so that
3235 * between the time RAR[0] gets clobbered and the time it
3236 * gets fixed (in e1000_watchdog), the actual LAA is in one
3237 * of the RARs and no incoming packets directed to this port
3238 * are dropped. Eventually the LAA will be in RAR[0] and
3241 e1000e_rar_set(&adapter
->hw
,
3242 adapter
->hw
.mac
.addr
,
3243 adapter
->hw
.mac
.rar_entry_count
- 1);
3250 * e1000e_update_phy_task - work thread to update phy
3251 * @work: pointer to our work struct
3253 * this worker thread exists because we must acquire a
3254 * semaphore to read the phy, which we could msleep while
3255 * waiting for it, and we can't msleep in a timer.
3257 static void e1000e_update_phy_task(struct work_struct
*work
)
3259 struct e1000_adapter
*adapter
= container_of(work
,
3260 struct e1000_adapter
, update_phy_task
);
3261 e1000_get_phy_info(&adapter
->hw
);
3265 * Need to wait a few seconds after link up to get diagnostic information from
3268 static void e1000_update_phy_info(unsigned long data
)
3270 struct e1000_adapter
*adapter
= (struct e1000_adapter
*) data
;
3271 schedule_work(&adapter
->update_phy_task
);
3275 * e1000e_update_stats - Update the board statistics counters
3276 * @adapter: board private structure
3278 void e1000e_update_stats(struct e1000_adapter
*adapter
)
3280 struct net_device
*netdev
= adapter
->netdev
;
3281 struct e1000_hw
*hw
= &adapter
->hw
;
3282 struct pci_dev
*pdev
= adapter
->pdev
;
3286 * Prevent stats update while adapter is being reset, or if the pci
3287 * connection is down.
3289 if (adapter
->link_speed
== 0)
3291 if (pci_channel_offline(pdev
))
3294 adapter
->stats
.crcerrs
+= er32(CRCERRS
);
3295 adapter
->stats
.gprc
+= er32(GPRC
);
3296 adapter
->stats
.gorc
+= er32(GORCL
);
3297 er32(GORCH
); /* Clear gorc */
3298 adapter
->stats
.bprc
+= er32(BPRC
);
3299 adapter
->stats
.mprc
+= er32(MPRC
);
3300 adapter
->stats
.roc
+= er32(ROC
);
3302 adapter
->stats
.mpc
+= er32(MPC
);
3303 if ((hw
->phy
.type
== e1000_phy_82578
) ||
3304 (hw
->phy
.type
== e1000_phy_82577
)) {
3305 e1e_rphy(hw
, HV_SCC_UPPER
, &phy_data
);
3306 if (!e1e_rphy(hw
, HV_SCC_LOWER
, &phy_data
))
3307 adapter
->stats
.scc
+= phy_data
;
3309 e1e_rphy(hw
, HV_ECOL_UPPER
, &phy_data
);
3310 if (!e1e_rphy(hw
, HV_ECOL_LOWER
, &phy_data
))
3311 adapter
->stats
.ecol
+= phy_data
;
3313 e1e_rphy(hw
, HV_MCC_UPPER
, &phy_data
);
3314 if (!e1e_rphy(hw
, HV_MCC_LOWER
, &phy_data
))
3315 adapter
->stats
.mcc
+= phy_data
;
3317 e1e_rphy(hw
, HV_LATECOL_UPPER
, &phy_data
);
3318 if (!e1e_rphy(hw
, HV_LATECOL_LOWER
, &phy_data
))
3319 adapter
->stats
.latecol
+= phy_data
;
3321 e1e_rphy(hw
, HV_DC_UPPER
, &phy_data
);
3322 if (!e1e_rphy(hw
, HV_DC_LOWER
, &phy_data
))
3323 adapter
->stats
.dc
+= phy_data
;
3325 adapter
->stats
.scc
+= er32(SCC
);
3326 adapter
->stats
.ecol
+= er32(ECOL
);
3327 adapter
->stats
.mcc
+= er32(MCC
);
3328 adapter
->stats
.latecol
+= er32(LATECOL
);
3329 adapter
->stats
.dc
+= er32(DC
);
3331 adapter
->stats
.xonrxc
+= er32(XONRXC
);
3332 adapter
->stats
.xontxc
+= er32(XONTXC
);
3333 adapter
->stats
.xoffrxc
+= er32(XOFFRXC
);
3334 adapter
->stats
.xofftxc
+= er32(XOFFTXC
);
3335 adapter
->stats
.gptc
+= er32(GPTC
);
3336 adapter
->stats
.gotc
+= er32(GOTCL
);
3337 er32(GOTCH
); /* Clear gotc */
3338 adapter
->stats
.rnbc
+= er32(RNBC
);
3339 adapter
->stats
.ruc
+= er32(RUC
);
3341 adapter
->stats
.mptc
+= er32(MPTC
);
3342 adapter
->stats
.bptc
+= er32(BPTC
);
3344 /* used for adaptive IFS */
3346 hw
->mac
.tx_packet_delta
= er32(TPT
);
3347 adapter
->stats
.tpt
+= hw
->mac
.tx_packet_delta
;
3348 if ((hw
->phy
.type
== e1000_phy_82578
) ||
3349 (hw
->phy
.type
== e1000_phy_82577
)) {
3350 e1e_rphy(hw
, HV_COLC_UPPER
, &phy_data
);
3351 if (!e1e_rphy(hw
, HV_COLC_LOWER
, &phy_data
))
3352 hw
->mac
.collision_delta
= phy_data
;
3354 hw
->mac
.collision_delta
= er32(COLC
);
3356 adapter
->stats
.colc
+= hw
->mac
.collision_delta
;
3358 adapter
->stats
.algnerrc
+= er32(ALGNERRC
);
3359 adapter
->stats
.rxerrc
+= er32(RXERRC
);
3360 if ((hw
->phy
.type
== e1000_phy_82578
) ||
3361 (hw
->phy
.type
== e1000_phy_82577
)) {
3362 e1e_rphy(hw
, HV_TNCRS_UPPER
, &phy_data
);
3363 if (!e1e_rphy(hw
, HV_TNCRS_LOWER
, &phy_data
))
3364 adapter
->stats
.tncrs
+= phy_data
;
3366 if ((hw
->mac
.type
!= e1000_82574
) &&
3367 (hw
->mac
.type
!= e1000_82583
))
3368 adapter
->stats
.tncrs
+= er32(TNCRS
);
3370 adapter
->stats
.cexterr
+= er32(CEXTERR
);
3371 adapter
->stats
.tsctc
+= er32(TSCTC
);
3372 adapter
->stats
.tsctfc
+= er32(TSCTFC
);
3374 /* Fill out the OS statistics structure */
3375 netdev
->stats
.multicast
= adapter
->stats
.mprc
;
3376 netdev
->stats
.collisions
= adapter
->stats
.colc
;
3381 * RLEC on some newer hardware can be incorrect so build
3382 * our own version based on RUC and ROC
3384 netdev
->stats
.rx_errors
= adapter
->stats
.rxerrc
+
3385 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3386 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3387 adapter
->stats
.cexterr
;
3388 netdev
->stats
.rx_length_errors
= adapter
->stats
.ruc
+
3390 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3391 netdev
->stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3392 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3395 netdev
->stats
.tx_errors
= adapter
->stats
.ecol
+
3396 adapter
->stats
.latecol
;
3397 netdev
->stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3398 netdev
->stats
.tx_window_errors
= adapter
->stats
.latecol
;
3399 netdev
->stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3401 /* Tx Dropped needs to be maintained elsewhere */
3403 /* Management Stats */
3404 adapter
->stats
.mgptc
+= er32(MGTPTC
);
3405 adapter
->stats
.mgprc
+= er32(MGTPRC
);
3406 adapter
->stats
.mgpdc
+= er32(MGTPDC
);
3410 * e1000_phy_read_status - Update the PHY register status snapshot
3411 * @adapter: board private structure
3413 static void e1000_phy_read_status(struct e1000_adapter
*adapter
)
3415 struct e1000_hw
*hw
= &adapter
->hw
;
3416 struct e1000_phy_regs
*phy
= &adapter
->phy_regs
;
3419 if ((er32(STATUS
) & E1000_STATUS_LU
) &&
3420 (adapter
->hw
.phy
.media_type
== e1000_media_type_copper
)) {
3421 ret_val
= e1e_rphy(hw
, PHY_CONTROL
, &phy
->bmcr
);
3422 ret_val
|= e1e_rphy(hw
, PHY_STATUS
, &phy
->bmsr
);
3423 ret_val
|= e1e_rphy(hw
, PHY_AUTONEG_ADV
, &phy
->advertise
);
3424 ret_val
|= e1e_rphy(hw
, PHY_LP_ABILITY
, &phy
->lpa
);
3425 ret_val
|= e1e_rphy(hw
, PHY_AUTONEG_EXP
, &phy
->expansion
);
3426 ret_val
|= e1e_rphy(hw
, PHY_1000T_CTRL
, &phy
->ctrl1000
);
3427 ret_val
|= e1e_rphy(hw
, PHY_1000T_STATUS
, &phy
->stat1000
);
3428 ret_val
|= e1e_rphy(hw
, PHY_EXT_STATUS
, &phy
->estatus
);
3430 e_warn("Error reading PHY register\n");
3433 * Do not read PHY registers if link is not up
3434 * Set values to typical power-on defaults
3436 phy
->bmcr
= (BMCR_SPEED1000
| BMCR_ANENABLE
| BMCR_FULLDPLX
);
3437 phy
->bmsr
= (BMSR_100FULL
| BMSR_100HALF
| BMSR_10FULL
|
3438 BMSR_10HALF
| BMSR_ESTATEN
| BMSR_ANEGCAPABLE
|
3440 phy
->advertise
= (ADVERTISE_PAUSE_ASYM
| ADVERTISE_PAUSE_CAP
|
3441 ADVERTISE_ALL
| ADVERTISE_CSMA
);
3443 phy
->expansion
= EXPANSION_ENABLENPAGE
;
3444 phy
->ctrl1000
= ADVERTISE_1000FULL
;
3446 phy
->estatus
= (ESTATUS_1000_TFULL
| ESTATUS_1000_THALF
);
3450 static void e1000_print_link_info(struct e1000_adapter
*adapter
)
3452 struct e1000_hw
*hw
= &adapter
->hw
;
3453 u32 ctrl
= er32(CTRL
);
3455 /* Link status message must follow this format for user tools */
3456 printk(KERN_INFO
"e1000e: %s NIC Link is Up %d Mbps %s, "
3457 "Flow Control: %s\n",
3458 adapter
->netdev
->name
,
3459 adapter
->link_speed
,
3460 (adapter
->link_duplex
== FULL_DUPLEX
) ?
3461 "Full Duplex" : "Half Duplex",
3462 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
& E1000_CTRL_RFCE
)) ?
3464 ((ctrl
& E1000_CTRL_RFCE
) ? "RX" :
3465 ((ctrl
& E1000_CTRL_TFCE
) ? "TX" : "None" )));
3468 bool e1000e_has_link(struct e1000_adapter
*adapter
)
3470 struct e1000_hw
*hw
= &adapter
->hw
;
3471 bool link_active
= 0;
3475 * get_link_status is set on LSC (link status) interrupt or
3476 * Rx sequence error interrupt. get_link_status will stay
3477 * false until the check_for_link establishes link
3478 * for copper adapters ONLY
3480 switch (hw
->phy
.media_type
) {
3481 case e1000_media_type_copper
:
3482 if (hw
->mac
.get_link_status
) {
3483 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
3484 link_active
= !hw
->mac
.get_link_status
;
3489 case e1000_media_type_fiber
:
3490 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
3491 link_active
= !!(er32(STATUS
) & E1000_STATUS_LU
);
3493 case e1000_media_type_internal_serdes
:
3494 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
3495 link_active
= adapter
->hw
.mac
.serdes_has_link
;
3498 case e1000_media_type_unknown
:
3502 if ((ret_val
== E1000_ERR_PHY
) && (hw
->phy
.type
== e1000_phy_igp_3
) &&
3503 (er32(CTRL
) & E1000_PHY_CTRL_GBE_DISABLE
)) {
3504 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
3505 e_info("Gigabit has been disabled, downgrading speed\n");
3511 static void e1000e_enable_receives(struct e1000_adapter
*adapter
)
3513 /* make sure the receive unit is started */
3514 if ((adapter
->flags
& FLAG_RX_NEEDS_RESTART
) &&
3515 (adapter
->flags
& FLAG_RX_RESTART_NOW
)) {
3516 struct e1000_hw
*hw
= &adapter
->hw
;
3517 u32 rctl
= er32(RCTL
);
3518 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
3519 adapter
->flags
&= ~FLAG_RX_RESTART_NOW
;
3524 * e1000_watchdog - Timer Call-back
3525 * @data: pointer to adapter cast into an unsigned long
3527 static void e1000_watchdog(unsigned long data
)
3529 struct e1000_adapter
*adapter
= (struct e1000_adapter
*) data
;
3531 /* Do the rest outside of interrupt context */
3532 schedule_work(&adapter
->watchdog_task
);
3534 /* TODO: make this use queue_delayed_work() */
3537 static void e1000_watchdog_task(struct work_struct
*work
)
3539 struct e1000_adapter
*adapter
= container_of(work
,
3540 struct e1000_adapter
, watchdog_task
);
3541 struct net_device
*netdev
= adapter
->netdev
;
3542 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
3543 struct e1000_phy_info
*phy
= &adapter
->hw
.phy
;
3544 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3545 struct e1000_hw
*hw
= &adapter
->hw
;
3549 link
= e1000e_has_link(adapter
);
3550 if ((netif_carrier_ok(netdev
)) && link
) {
3551 e1000e_enable_receives(adapter
);
3555 if ((e1000e_enable_tx_pkt_filtering(hw
)) &&
3556 (adapter
->mng_vlan_id
!= adapter
->hw
.mng_cookie
.vlan_id
))
3557 e1000_update_mng_vlan(adapter
);
3560 if (!netif_carrier_ok(netdev
)) {
3562 /* update snapshot of PHY registers on LSC */
3563 e1000_phy_read_status(adapter
);
3564 mac
->ops
.get_link_up_info(&adapter
->hw
,
3565 &adapter
->link_speed
,
3566 &adapter
->link_duplex
);
3567 e1000_print_link_info(adapter
);
3569 * On supported PHYs, check for duplex mismatch only
3570 * if link has autonegotiated at 10/100 half
3572 if ((hw
->phy
.type
== e1000_phy_igp_3
||
3573 hw
->phy
.type
== e1000_phy_bm
) &&
3574 (hw
->mac
.autoneg
== true) &&
3575 (adapter
->link_speed
== SPEED_10
||
3576 adapter
->link_speed
== SPEED_100
) &&
3577 (adapter
->link_duplex
== HALF_DUPLEX
)) {
3580 e1e_rphy(hw
, PHY_AUTONEG_EXP
, &autoneg_exp
);
3582 if (!(autoneg_exp
& NWAY_ER_LP_NWAY_CAPS
))
3583 e_info("Autonegotiated half duplex but"
3584 " link partner cannot autoneg. "
3585 " Try forcing full duplex if "
3586 "link gets many collisions.\n");
3589 /* adjust timeout factor according to speed/duplex */
3590 adapter
->tx_timeout_factor
= 1;
3591 switch (adapter
->link_speed
) {
3594 adapter
->tx_timeout_factor
= 16;
3598 adapter
->tx_timeout_factor
= 10;
3603 * workaround: re-program speed mode bit after
3606 if ((adapter
->flags
& FLAG_TARC_SPEED_MODE_BIT
) &&
3609 tarc0
= er32(TARC(0));
3610 tarc0
&= ~SPEED_MODE_BIT
;
3611 ew32(TARC(0), tarc0
);
3615 * disable TSO for pcie and 10/100 speeds, to avoid
3616 * some hardware issues
3618 if (!(adapter
->flags
& FLAG_TSO_FORCE
)) {
3619 switch (adapter
->link_speed
) {
3622 e_info("10/100 speed: disabling TSO\n");
3623 netdev
->features
&= ~NETIF_F_TSO
;
3624 netdev
->features
&= ~NETIF_F_TSO6
;
3627 netdev
->features
|= NETIF_F_TSO
;
3628 netdev
->features
|= NETIF_F_TSO6
;
3637 * enable transmits in the hardware, need to do this
3638 * after setting TARC(0)
3641 tctl
|= E1000_TCTL_EN
;
3645 * Perform any post-link-up configuration before
3646 * reporting link up.
3648 if (phy
->ops
.cfg_on_link_up
)
3649 phy
->ops
.cfg_on_link_up(hw
);
3651 netif_carrier_on(netdev
);
3653 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
3654 mod_timer(&adapter
->phy_info_timer
,
3655 round_jiffies(jiffies
+ 2 * HZ
));
3658 if (netif_carrier_ok(netdev
)) {
3659 adapter
->link_speed
= 0;
3660 adapter
->link_duplex
= 0;
3661 /* Link status message must follow this format */
3662 printk(KERN_INFO
"e1000e: %s NIC Link is Down\n",
3663 adapter
->netdev
->name
);
3664 netif_carrier_off(netdev
);
3665 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
3666 mod_timer(&adapter
->phy_info_timer
,
3667 round_jiffies(jiffies
+ 2 * HZ
));
3669 if (adapter
->flags
& FLAG_RX_NEEDS_RESTART
)
3670 schedule_work(&adapter
->reset_task
);
3675 e1000e_update_stats(adapter
);
3677 mac
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
3678 adapter
->tpt_old
= adapter
->stats
.tpt
;
3679 mac
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
3680 adapter
->colc_old
= adapter
->stats
.colc
;
3682 adapter
->gorc
= adapter
->stats
.gorc
- adapter
->gorc_old
;
3683 adapter
->gorc_old
= adapter
->stats
.gorc
;
3684 adapter
->gotc
= adapter
->stats
.gotc
- adapter
->gotc_old
;
3685 adapter
->gotc_old
= adapter
->stats
.gotc
;
3687 e1000e_update_adaptive(&adapter
->hw
);
3689 if (!netif_carrier_ok(netdev
)) {
3690 tx_pending
= (e1000_desc_unused(tx_ring
) + 1 <
3694 * We've lost link, so the controller stops DMA,
3695 * but we've got queued Tx work that's never going
3696 * to get done, so reset controller to flush Tx.
3697 * (Do the reset outside of interrupt context).
3699 adapter
->tx_timeout_count
++;
3700 schedule_work(&adapter
->reset_task
);
3701 /* return immediately since reset is imminent */
3706 /* Cause software interrupt to ensure Rx ring is cleaned */
3707 if (adapter
->msix_entries
)
3708 ew32(ICS
, adapter
->rx_ring
->ims_val
);
3710 ew32(ICS
, E1000_ICS_RXDMT0
);
3712 /* Force detection of hung controller every watchdog period */
3713 adapter
->detect_tx_hung
= 1;
3716 * With 82571 controllers, LAA may be overwritten due to controller
3717 * reset from the other port. Set the appropriate LAA in RAR[0]
3719 if (e1000e_get_laa_state_82571(hw
))
3720 e1000e_rar_set(hw
, adapter
->hw
.mac
.addr
, 0);
3722 /* Reset the timer */
3723 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
3724 mod_timer(&adapter
->watchdog_timer
,
3725 round_jiffies(jiffies
+ 2 * HZ
));
3728 #define E1000_TX_FLAGS_CSUM 0x00000001
3729 #define E1000_TX_FLAGS_VLAN 0x00000002
3730 #define E1000_TX_FLAGS_TSO 0x00000004
3731 #define E1000_TX_FLAGS_IPV4 0x00000008
3732 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
3733 #define E1000_TX_FLAGS_VLAN_SHIFT 16
3735 static int e1000_tso(struct e1000_adapter
*adapter
,
3736 struct sk_buff
*skb
)
3738 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3739 struct e1000_context_desc
*context_desc
;
3740 struct e1000_buffer
*buffer_info
;
3743 u16 ipcse
= 0, tucse
, mss
;
3744 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
3747 if (!skb_is_gso(skb
))
3750 if (skb_header_cloned(skb
)) {
3751 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
3756 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
3757 mss
= skb_shinfo(skb
)->gso_size
;
3758 if (skb
->protocol
== htons(ETH_P_IP
)) {
3759 struct iphdr
*iph
= ip_hdr(skb
);
3762 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
, iph
->daddr
,
3764 cmd_length
= E1000_TXD_CMD_IP
;
3765 ipcse
= skb_transport_offset(skb
) - 1;
3766 } else if (skb_is_gso_v6(skb
)) {
3767 ipv6_hdr(skb
)->payload_len
= 0;
3768 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
3769 &ipv6_hdr(skb
)->daddr
,
3773 ipcss
= skb_network_offset(skb
);
3774 ipcso
= (void *)&(ip_hdr(skb
)->check
) - (void *)skb
->data
;
3775 tucss
= skb_transport_offset(skb
);
3776 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
3779 cmd_length
|= (E1000_TXD_CMD_DEXT
| E1000_TXD_CMD_TSE
|
3780 E1000_TXD_CMD_TCP
| (skb
->len
- (hdr_len
)));
3782 i
= tx_ring
->next_to_use
;
3783 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
3784 buffer_info
= &tx_ring
->buffer_info
[i
];
3786 context_desc
->lower_setup
.ip_fields
.ipcss
= ipcss
;
3787 context_desc
->lower_setup
.ip_fields
.ipcso
= ipcso
;
3788 context_desc
->lower_setup
.ip_fields
.ipcse
= cpu_to_le16(ipcse
);
3789 context_desc
->upper_setup
.tcp_fields
.tucss
= tucss
;
3790 context_desc
->upper_setup
.tcp_fields
.tucso
= tucso
;
3791 context_desc
->upper_setup
.tcp_fields
.tucse
= cpu_to_le16(tucse
);
3792 context_desc
->tcp_seg_setup
.fields
.mss
= cpu_to_le16(mss
);
3793 context_desc
->tcp_seg_setup
.fields
.hdr_len
= hdr_len
;
3794 context_desc
->cmd_and_length
= cpu_to_le32(cmd_length
);
3796 buffer_info
->time_stamp
= jiffies
;
3797 buffer_info
->next_to_watch
= i
;
3800 if (i
== tx_ring
->count
)
3802 tx_ring
->next_to_use
= i
;
3807 static bool e1000_tx_csum(struct e1000_adapter
*adapter
, struct sk_buff
*skb
)
3809 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3810 struct e1000_context_desc
*context_desc
;
3811 struct e1000_buffer
*buffer_info
;
3814 u32 cmd_len
= E1000_TXD_CMD_DEXT
;
3817 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
3820 if (skb
->protocol
== cpu_to_be16(ETH_P_8021Q
))
3821 protocol
= vlan_eth_hdr(skb
)->h_vlan_encapsulated_proto
;
3823 protocol
= skb
->protocol
;
3826 case cpu_to_be16(ETH_P_IP
):
3827 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
3828 cmd_len
|= E1000_TXD_CMD_TCP
;
3830 case cpu_to_be16(ETH_P_IPV6
):
3831 /* XXX not handling all IPV6 headers */
3832 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
3833 cmd_len
|= E1000_TXD_CMD_TCP
;
3836 if (unlikely(net_ratelimit()))
3837 e_warn("checksum_partial proto=%x!\n",
3838 be16_to_cpu(protocol
));
3842 css
= skb_transport_offset(skb
);
3844 i
= tx_ring
->next_to_use
;
3845 buffer_info
= &tx_ring
->buffer_info
[i
];
3846 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
3848 context_desc
->lower_setup
.ip_config
= 0;
3849 context_desc
->upper_setup
.tcp_fields
.tucss
= css
;
3850 context_desc
->upper_setup
.tcp_fields
.tucso
=
3851 css
+ skb
->csum_offset
;
3852 context_desc
->upper_setup
.tcp_fields
.tucse
= 0;
3853 context_desc
->tcp_seg_setup
.data
= 0;
3854 context_desc
->cmd_and_length
= cpu_to_le32(cmd_len
);
3856 buffer_info
->time_stamp
= jiffies
;
3857 buffer_info
->next_to_watch
= i
;
3860 if (i
== tx_ring
->count
)
3862 tx_ring
->next_to_use
= i
;
3867 #define E1000_MAX_PER_TXD 8192
3868 #define E1000_MAX_TXD_PWR 12
3870 static int e1000_tx_map(struct e1000_adapter
*adapter
,
3871 struct sk_buff
*skb
, unsigned int first
,
3872 unsigned int max_per_txd
, unsigned int nr_frags
,
3875 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3876 struct pci_dev
*pdev
= adapter
->pdev
;
3877 struct e1000_buffer
*buffer_info
;
3878 unsigned int len
= skb_headlen(skb
);
3879 unsigned int offset
= 0, size
, count
= 0, i
;
3882 i
= tx_ring
->next_to_use
;
3885 buffer_info
= &tx_ring
->buffer_info
[i
];
3886 size
= min(len
, max_per_txd
);
3888 buffer_info
->length
= size
;
3889 buffer_info
->time_stamp
= jiffies
;
3890 buffer_info
->next_to_watch
= i
;
3891 buffer_info
->dma
= pci_map_single(pdev
, skb
->data
+ offset
,
3892 size
, PCI_DMA_TODEVICE
);
3893 buffer_info
->mapped_as_page
= false;
3894 if (pci_dma_mapping_error(pdev
, buffer_info
->dma
))
3903 if (i
== tx_ring
->count
)
3908 for (f
= 0; f
< nr_frags
; f
++) {
3909 struct skb_frag_struct
*frag
;
3911 frag
= &skb_shinfo(skb
)->frags
[f
];
3913 offset
= frag
->page_offset
;
3917 if (i
== tx_ring
->count
)
3920 buffer_info
= &tx_ring
->buffer_info
[i
];
3921 size
= min(len
, max_per_txd
);
3923 buffer_info
->length
= size
;
3924 buffer_info
->time_stamp
= jiffies
;
3925 buffer_info
->next_to_watch
= i
;
3926 buffer_info
->dma
= pci_map_page(pdev
, frag
->page
,
3929 buffer_info
->mapped_as_page
= true;
3930 if (pci_dma_mapping_error(pdev
, buffer_info
->dma
))
3939 tx_ring
->buffer_info
[i
].skb
= skb
;
3940 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
3945 dev_err(&pdev
->dev
, "TX DMA map failed\n");
3946 buffer_info
->dma
= 0;
3952 i
+= tx_ring
->count
;
3954 buffer_info
= &tx_ring
->buffer_info
[i
];
3955 e1000_put_txbuf(adapter
, buffer_info
);;
3961 static void e1000_tx_queue(struct e1000_adapter
*adapter
,
3962 int tx_flags
, int count
)
3964 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3965 struct e1000_tx_desc
*tx_desc
= NULL
;
3966 struct e1000_buffer
*buffer_info
;
3967 u32 txd_upper
= 0, txd_lower
= E1000_TXD_CMD_IFCS
;
3970 if (tx_flags
& E1000_TX_FLAGS_TSO
) {
3971 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
|
3973 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
3975 if (tx_flags
& E1000_TX_FLAGS_IPV4
)
3976 txd_upper
|= E1000_TXD_POPTS_IXSM
<< 8;
3979 if (tx_flags
& E1000_TX_FLAGS_CSUM
) {
3980 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
;
3981 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
3984 if (tx_flags
& E1000_TX_FLAGS_VLAN
) {
3985 txd_lower
|= E1000_TXD_CMD_VLE
;
3986 txd_upper
|= (tx_flags
& E1000_TX_FLAGS_VLAN_MASK
);
3989 i
= tx_ring
->next_to_use
;
3992 buffer_info
= &tx_ring
->buffer_info
[i
];
3993 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3994 tx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
3995 tx_desc
->lower
.data
=
3996 cpu_to_le32(txd_lower
| buffer_info
->length
);
3997 tx_desc
->upper
.data
= cpu_to_le32(txd_upper
);
4000 if (i
== tx_ring
->count
)
4004 tx_desc
->lower
.data
|= cpu_to_le32(adapter
->txd_cmd
);
4007 * Force memory writes to complete before letting h/w
4008 * know there are new descriptors to fetch. (Only
4009 * applicable for weak-ordered memory model archs,
4014 tx_ring
->next_to_use
= i
;
4015 writel(i
, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
4017 * we need this if more than one processor can write to our tail
4018 * at a time, it synchronizes IO on IA64/Altix systems
4023 #define MINIMUM_DHCP_PACKET_SIZE 282
4024 static int e1000_transfer_dhcp_info(struct e1000_adapter
*adapter
,
4025 struct sk_buff
*skb
)
4027 struct e1000_hw
*hw
= &adapter
->hw
;
4030 if (vlan_tx_tag_present(skb
)) {
4031 if (!((vlan_tx_tag_get(skb
) == adapter
->hw
.mng_cookie
.vlan_id
) &&
4032 (adapter
->hw
.mng_cookie
.status
&
4033 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
)))
4037 if (skb
->len
<= MINIMUM_DHCP_PACKET_SIZE
)
4040 if (((struct ethhdr
*) skb
->data
)->h_proto
!= htons(ETH_P_IP
))
4044 const struct iphdr
*ip
= (struct iphdr
*)((u8
*)skb
->data
+14);
4047 if (ip
->protocol
!= IPPROTO_UDP
)
4050 udp
= (struct udphdr
*)((u8
*)ip
+ (ip
->ihl
<< 2));
4051 if (ntohs(udp
->dest
) != 67)
4054 offset
= (u8
*)udp
+ 8 - skb
->data
;
4055 length
= skb
->len
- offset
;
4056 return e1000e_mng_write_dhcp_info(hw
, (u8
*)udp
+ 8, length
);
4062 static int __e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
4064 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4066 netif_stop_queue(netdev
);
4068 * Herbert's original patch had:
4069 * smp_mb__after_netif_stop_queue();
4070 * but since that doesn't exist yet, just open code it.
4075 * We need to check again in a case another CPU has just
4076 * made room available.
4078 if (e1000_desc_unused(adapter
->tx_ring
) < size
)
4082 netif_start_queue(netdev
);
4083 ++adapter
->restart_queue
;
4087 static int e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
4089 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4091 if (e1000_desc_unused(adapter
->tx_ring
) >= size
)
4093 return __e1000_maybe_stop_tx(netdev
, size
);
4096 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
4097 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
4098 struct net_device
*netdev
)
4100 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4101 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
4103 unsigned int max_per_txd
= E1000_MAX_PER_TXD
;
4104 unsigned int max_txd_pwr
= E1000_MAX_TXD_PWR
;
4105 unsigned int tx_flags
= 0;
4106 unsigned int len
= skb
->len
- skb
->data_len
;
4107 unsigned int nr_frags
;
4113 if (test_bit(__E1000_DOWN
, &adapter
->state
)) {
4114 dev_kfree_skb_any(skb
);
4115 return NETDEV_TX_OK
;
4118 if (skb
->len
<= 0) {
4119 dev_kfree_skb_any(skb
);
4120 return NETDEV_TX_OK
;
4123 mss
= skb_shinfo(skb
)->gso_size
;
4125 * The controller does a simple calculation to
4126 * make sure there is enough room in the FIFO before
4127 * initiating the DMA for each buffer. The calc is:
4128 * 4 = ceil(buffer len/mss). To make sure we don't
4129 * overrun the FIFO, adjust the max buffer len if mss
4134 max_per_txd
= min(mss
<< 2, max_per_txd
);
4135 max_txd_pwr
= fls(max_per_txd
) - 1;
4138 * TSO Workaround for 82571/2/3 Controllers -- if skb->data
4139 * points to just header, pull a few bytes of payload from
4140 * frags into skb->data
4142 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
4144 * we do this workaround for ES2LAN, but it is un-necessary,
4145 * avoiding it could save a lot of cycles
4147 if (skb
->data_len
&& (hdr_len
== len
)) {
4148 unsigned int pull_size
;
4150 pull_size
= min((unsigned int)4, skb
->data_len
);
4151 if (!__pskb_pull_tail(skb
, pull_size
)) {
4152 e_err("__pskb_pull_tail failed.\n");
4153 dev_kfree_skb_any(skb
);
4154 return NETDEV_TX_OK
;
4156 len
= skb
->len
- skb
->data_len
;
4160 /* reserve a descriptor for the offload context */
4161 if ((mss
) || (skb
->ip_summed
== CHECKSUM_PARTIAL
))
4165 count
+= TXD_USE_COUNT(len
, max_txd_pwr
);
4167 nr_frags
= skb_shinfo(skb
)->nr_frags
;
4168 for (f
= 0; f
< nr_frags
; f
++)
4169 count
+= TXD_USE_COUNT(skb_shinfo(skb
)->frags
[f
].size
,
4172 if (adapter
->hw
.mac
.tx_pkt_filtering
)
4173 e1000_transfer_dhcp_info(adapter
, skb
);
4176 * need: count + 2 desc gap to keep tail from touching
4177 * head, otherwise try next time
4179 if (e1000_maybe_stop_tx(netdev
, count
+ 2))
4180 return NETDEV_TX_BUSY
;
4182 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
4183 tx_flags
|= E1000_TX_FLAGS_VLAN
;
4184 tx_flags
|= (vlan_tx_tag_get(skb
) << E1000_TX_FLAGS_VLAN_SHIFT
);
4187 first
= tx_ring
->next_to_use
;
4189 tso
= e1000_tso(adapter
, skb
);
4191 dev_kfree_skb_any(skb
);
4192 return NETDEV_TX_OK
;
4196 tx_flags
|= E1000_TX_FLAGS_TSO
;
4197 else if (e1000_tx_csum(adapter
, skb
))
4198 tx_flags
|= E1000_TX_FLAGS_CSUM
;
4201 * Old method was to assume IPv4 packet by default if TSO was enabled.
4202 * 82571 hardware supports TSO capabilities for IPv6 as well...
4203 * no longer assume, we must.
4205 if (skb
->protocol
== htons(ETH_P_IP
))
4206 tx_flags
|= E1000_TX_FLAGS_IPV4
;
4208 /* if count is 0 then mapping error has occured */
4209 count
= e1000_tx_map(adapter
, skb
, first
, max_per_txd
, nr_frags
, mss
);
4211 e1000_tx_queue(adapter
, tx_flags
, count
);
4212 /* Make sure there is space in the ring for the next send. */
4213 e1000_maybe_stop_tx(netdev
, MAX_SKB_FRAGS
+ 2);
4216 dev_kfree_skb_any(skb
);
4217 tx_ring
->buffer_info
[first
].time_stamp
= 0;
4218 tx_ring
->next_to_use
= first
;
4221 return NETDEV_TX_OK
;
4225 * e1000_tx_timeout - Respond to a Tx Hang
4226 * @netdev: network interface device structure
4228 static void e1000_tx_timeout(struct net_device
*netdev
)
4230 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4232 /* Do the reset outside of interrupt context */
4233 adapter
->tx_timeout_count
++;
4234 schedule_work(&adapter
->reset_task
);
4237 static void e1000_reset_task(struct work_struct
*work
)
4239 struct e1000_adapter
*adapter
;
4240 adapter
= container_of(work
, struct e1000_adapter
, reset_task
);
4242 e1000e_reinit_locked(adapter
);
4246 * e1000_get_stats - Get System Network Statistics
4247 * @netdev: network interface device structure
4249 * Returns the address of the device statistics structure.
4250 * The statistics are actually updated from the timer callback.
4252 static struct net_device_stats
*e1000_get_stats(struct net_device
*netdev
)
4254 /* only return the current stats */
4255 return &netdev
->stats
;
4259 * e1000_change_mtu - Change the Maximum Transfer Unit
4260 * @netdev: network interface device structure
4261 * @new_mtu: new value for maximum frame size
4263 * Returns 0 on success, negative on failure
4265 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
)
4267 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4268 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
4270 /* Jumbo frame support */
4271 if ((max_frame
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) &&
4272 !(adapter
->flags
& FLAG_HAS_JUMBO_FRAMES
)) {
4273 e_err("Jumbo Frames not supported.\n");
4277 /* Supported frame sizes */
4278 if ((new_mtu
< ETH_ZLEN
+ ETH_FCS_LEN
+ VLAN_HLEN
) ||
4279 (max_frame
> adapter
->max_hw_frame_size
)) {
4280 e_err("Unsupported MTU setting\n");
4284 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->state
))
4286 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
4287 adapter
->max_frame_size
= max_frame
;
4288 e_info("changing MTU from %d to %d\n", netdev
->mtu
, new_mtu
);
4289 netdev
->mtu
= new_mtu
;
4290 if (netif_running(netdev
))
4291 e1000e_down(adapter
);
4294 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
4295 * means we reserve 2 more, this pushes us to allocate from the next
4297 * i.e. RXBUFFER_2048 --> size-4096 slab
4298 * However with the new *_jumbo_rx* routines, jumbo receives will use
4302 if (max_frame
<= 2048)
4303 adapter
->rx_buffer_len
= 2048;
4305 adapter
->rx_buffer_len
= 4096;
4307 /* adjust allocation if LPE protects us, and we aren't using SBP */
4308 if ((max_frame
== ETH_FRAME_LEN
+ ETH_FCS_LEN
) ||
4309 (max_frame
== ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
))
4310 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
4313 if (netif_running(netdev
))
4316 e1000e_reset(adapter
);
4318 clear_bit(__E1000_RESETTING
, &adapter
->state
);
4323 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
4326 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4327 struct mii_ioctl_data
*data
= if_mii(ifr
);
4329 if (adapter
->hw
.phy
.media_type
!= e1000_media_type_copper
)
4334 data
->phy_id
= adapter
->hw
.phy
.addr
;
4337 e1000_phy_read_status(adapter
);
4339 switch (data
->reg_num
& 0x1F) {
4341 data
->val_out
= adapter
->phy_regs
.bmcr
;
4344 data
->val_out
= adapter
->phy_regs
.bmsr
;
4347 data
->val_out
= (adapter
->hw
.phy
.id
>> 16);
4350 data
->val_out
= (adapter
->hw
.phy
.id
& 0xFFFF);
4353 data
->val_out
= adapter
->phy_regs
.advertise
;
4356 data
->val_out
= adapter
->phy_regs
.lpa
;
4359 data
->val_out
= adapter
->phy_regs
.expansion
;
4362 data
->val_out
= adapter
->phy_regs
.ctrl1000
;
4365 data
->val_out
= adapter
->phy_regs
.stat1000
;
4368 data
->val_out
= adapter
->phy_regs
.estatus
;
4381 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4387 return e1000_mii_ioctl(netdev
, ifr
, cmd
);
4393 static int e1000_init_phy_wakeup(struct e1000_adapter
*adapter
, u32 wufc
)
4395 struct e1000_hw
*hw
= &adapter
->hw
;
4400 /* copy MAC RARs to PHY RARs */
4401 for (i
= 0; i
< adapter
->hw
.mac
.rar_entry_count
; i
++) {
4402 mac_reg
= er32(RAL(i
));
4403 e1e_wphy(hw
, BM_RAR_L(i
), (u16
)(mac_reg
& 0xFFFF));
4404 e1e_wphy(hw
, BM_RAR_M(i
), (u16
)((mac_reg
>> 16) & 0xFFFF));
4405 mac_reg
= er32(RAH(i
));
4406 e1e_wphy(hw
, BM_RAR_H(i
), (u16
)(mac_reg
& 0xFFFF));
4407 e1e_wphy(hw
, BM_RAR_CTRL(i
), (u16
)((mac_reg
>> 16) & 0xFFFF));
4410 /* copy MAC MTA to PHY MTA */
4411 for (i
= 0; i
< adapter
->hw
.mac
.mta_reg_count
; i
++) {
4412 mac_reg
= E1000_READ_REG_ARRAY(hw
, E1000_MTA
, i
);
4413 e1e_wphy(hw
, BM_MTA(i
), (u16
)(mac_reg
& 0xFFFF));
4414 e1e_wphy(hw
, BM_MTA(i
) + 1, (u16
)((mac_reg
>> 16) & 0xFFFF));
4417 /* configure PHY Rx Control register */
4418 e1e_rphy(&adapter
->hw
, BM_RCTL
, &phy_reg
);
4419 mac_reg
= er32(RCTL
);
4420 if (mac_reg
& E1000_RCTL_UPE
)
4421 phy_reg
|= BM_RCTL_UPE
;
4422 if (mac_reg
& E1000_RCTL_MPE
)
4423 phy_reg
|= BM_RCTL_MPE
;
4424 phy_reg
&= ~(BM_RCTL_MO_MASK
);
4425 if (mac_reg
& E1000_RCTL_MO_3
)
4426 phy_reg
|= (((mac_reg
& E1000_RCTL_MO_3
) >> E1000_RCTL_MO_SHIFT
)
4427 << BM_RCTL_MO_SHIFT
);
4428 if (mac_reg
& E1000_RCTL_BAM
)
4429 phy_reg
|= BM_RCTL_BAM
;
4430 if (mac_reg
& E1000_RCTL_PMCF
)
4431 phy_reg
|= BM_RCTL_PMCF
;
4432 mac_reg
= er32(CTRL
);
4433 if (mac_reg
& E1000_CTRL_RFCE
)
4434 phy_reg
|= BM_RCTL_RFCE
;
4435 e1e_wphy(&adapter
->hw
, BM_RCTL
, phy_reg
);
4437 /* enable PHY wakeup in MAC register */
4439 ew32(WUC
, E1000_WUC_PHY_WAKE
| E1000_WUC_PME_EN
);
4441 /* configure and enable PHY wakeup in PHY registers */
4442 e1e_wphy(&adapter
->hw
, BM_WUFC
, wufc
);
4443 e1e_wphy(&adapter
->hw
, BM_WUC
, E1000_WUC_PME_EN
);
4445 /* activate PHY wakeup */
4446 retval
= hw
->phy
.ops
.acquire(hw
);
4448 e_err("Could not acquire PHY\n");
4451 e1000e_write_phy_reg_mdic(hw
, IGP01E1000_PHY_PAGE_SELECT
,
4452 (BM_WUC_ENABLE_PAGE
<< IGP_PAGE_SHIFT
));
4453 retval
= e1000e_read_phy_reg_mdic(hw
, BM_WUC_ENABLE_REG
, &phy_reg
);
4455 e_err("Could not read PHY page 769\n");
4458 phy_reg
|= BM_WUC_ENABLE_BIT
| BM_WUC_HOST_WU_BIT
;
4459 retval
= e1000e_write_phy_reg_mdic(hw
, BM_WUC_ENABLE_REG
, phy_reg
);
4461 e_err("Could not set PHY Host Wakeup bit\n");
4463 hw
->phy
.ops
.release(hw
);
4468 static int __e1000_shutdown(struct pci_dev
*pdev
, bool *enable_wake
)
4470 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4471 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4472 struct e1000_hw
*hw
= &adapter
->hw
;
4473 u32 ctrl
, ctrl_ext
, rctl
, status
;
4474 u32 wufc
= adapter
->wol
;
4477 netif_device_detach(netdev
);
4479 if (netif_running(netdev
)) {
4480 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->state
));
4481 e1000e_down(adapter
);
4482 e1000_free_irq(adapter
);
4484 e1000e_reset_interrupt_capability(adapter
);
4486 retval
= pci_save_state(pdev
);
4490 status
= er32(STATUS
);
4491 if (status
& E1000_STATUS_LU
)
4492 wufc
&= ~E1000_WUFC_LNKC
;
4495 e1000_setup_rctl(adapter
);
4496 e1000_set_multi(netdev
);
4498 /* turn on all-multi mode if wake on multicast is enabled */
4499 if (wufc
& E1000_WUFC_MC
) {
4501 rctl
|= E1000_RCTL_MPE
;
4506 /* advertise wake from D3Cold */
4507 #define E1000_CTRL_ADVD3WUC 0x00100000
4508 /* phy power management enable */
4509 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4510 ctrl
|= E1000_CTRL_ADVD3WUC
;
4511 if (!(adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
))
4512 ctrl
|= E1000_CTRL_EN_PHY_PWR_MGMT
;
4515 if (adapter
->hw
.phy
.media_type
== e1000_media_type_fiber
||
4516 adapter
->hw
.phy
.media_type
==
4517 e1000_media_type_internal_serdes
) {
4518 /* keep the laser running in D3 */
4519 ctrl_ext
= er32(CTRL_EXT
);
4520 ctrl_ext
|= E1000_CTRL_EXT_SDP3_DATA
;
4521 ew32(CTRL_EXT
, ctrl_ext
);
4524 if (adapter
->flags
& FLAG_IS_ICH
)
4525 e1000e_disable_gig_wol_ich8lan(&adapter
->hw
);
4527 /* Allow time for pending master requests to run */
4528 e1000e_disable_pcie_master(&adapter
->hw
);
4530 if (adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
) {
4531 /* enable wakeup by the PHY */
4532 retval
= e1000_init_phy_wakeup(adapter
, wufc
);
4536 /* enable wakeup by the MAC */
4538 ew32(WUC
, E1000_WUC_PME_EN
);
4545 *enable_wake
= !!wufc
;
4547 /* make sure adapter isn't asleep if manageability is enabled */
4548 if ((adapter
->flags
& FLAG_MNG_PT_ENABLED
) ||
4549 (hw
->mac
.ops
.check_mng_mode(hw
)))
4550 *enable_wake
= true;
4552 if (adapter
->hw
.phy
.type
== e1000_phy_igp_3
)
4553 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter
->hw
);
4556 * Release control of h/w to f/w. If f/w is AMT enabled, this
4557 * would have already happened in close and is redundant.
4559 e1000_release_hw_control(adapter
);
4561 pci_disable_device(pdev
);
4566 static void e1000_power_off(struct pci_dev
*pdev
, bool sleep
, bool wake
)
4568 if (sleep
&& wake
) {
4569 pci_prepare_to_sleep(pdev
);
4573 pci_wake_from_d3(pdev
, wake
);
4574 pci_set_power_state(pdev
, PCI_D3hot
);
4577 static void e1000_complete_shutdown(struct pci_dev
*pdev
, bool sleep
,
4580 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4581 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4584 * The pci-e switch on some quad port adapters will report a
4585 * correctable error when the MAC transitions from D0 to D3. To
4586 * prevent this we need to mask off the correctable errors on the
4587 * downstream port of the pci-e switch.
4589 if (adapter
->flags
& FLAG_IS_QUAD_PORT
) {
4590 struct pci_dev
*us_dev
= pdev
->bus
->self
;
4591 int pos
= pci_find_capability(us_dev
, PCI_CAP_ID_EXP
);
4594 pci_read_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
, &devctl
);
4595 pci_write_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
,
4596 (devctl
& ~PCI_EXP_DEVCTL_CERE
));
4598 e1000_power_off(pdev
, sleep
, wake
);
4600 pci_write_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
, devctl
);
4602 e1000_power_off(pdev
, sleep
, wake
);
4606 static void e1000e_disable_l1aspm(struct pci_dev
*pdev
)
4612 * 82573 workaround - disable L1 ASPM on mobile chipsets
4614 * L1 ASPM on various mobile (ich7) chipsets do not behave properly
4615 * resulting in lost data or garbage information on the pci-e link
4616 * level. This could result in (false) bad EEPROM checksum errors,
4617 * long ping times (up to 2s) or even a system freeze/hang.
4619 * Unfortunately this feature saves about 1W power consumption when
4622 pos
= pci_find_capability(pdev
, PCI_CAP_ID_EXP
);
4623 pci_read_config_word(pdev
, pos
+ PCI_EXP_LNKCTL
, &val
);
4625 dev_warn(&pdev
->dev
, "Disabling L1 ASPM\n");
4627 pci_write_config_word(pdev
, pos
+ PCI_EXP_LNKCTL
, val
);
4632 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4637 retval
= __e1000_shutdown(pdev
, &wake
);
4639 e1000_complete_shutdown(pdev
, true, wake
);
4644 static int e1000_resume(struct pci_dev
*pdev
)
4646 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4647 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4648 struct e1000_hw
*hw
= &adapter
->hw
;
4651 pci_set_power_state(pdev
, PCI_D0
);
4652 pci_restore_state(pdev
);
4653 pci_save_state(pdev
);
4654 e1000e_disable_l1aspm(pdev
);
4656 err
= pci_enable_device_mem(pdev
);
4659 "Cannot enable PCI device from suspend\n");
4663 pci_set_master(pdev
);
4665 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4666 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4668 e1000e_set_interrupt_capability(adapter
);
4669 if (netif_running(netdev
)) {
4670 err
= e1000_request_irq(adapter
);
4675 e1000e_power_up_phy(adapter
);
4677 /* report the system wakeup cause from S3/S4 */
4678 if (adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
) {
4681 e1e_rphy(&adapter
->hw
, BM_WUS
, &phy_data
);
4683 e_info("PHY Wakeup cause - %s\n",
4684 phy_data
& E1000_WUS_EX
? "Unicast Packet" :
4685 phy_data
& E1000_WUS_MC
? "Multicast Packet" :
4686 phy_data
& E1000_WUS_BC
? "Broadcast Packet" :
4687 phy_data
& E1000_WUS_MAG
? "Magic Packet" :
4688 phy_data
& E1000_WUS_LNKC
? "Link Status "
4689 " Change" : "other");
4691 e1e_wphy(&adapter
->hw
, BM_WUS
, ~0);
4693 u32 wus
= er32(WUS
);
4695 e_info("MAC Wakeup cause - %s\n",
4696 wus
& E1000_WUS_EX
? "Unicast Packet" :
4697 wus
& E1000_WUS_MC
? "Multicast Packet" :
4698 wus
& E1000_WUS_BC
? "Broadcast Packet" :
4699 wus
& E1000_WUS_MAG
? "Magic Packet" :
4700 wus
& E1000_WUS_LNKC
? "Link Status Change" :
4706 e1000e_reset(adapter
);
4708 e1000_init_manageability(adapter
);
4710 if (netif_running(netdev
))
4713 netif_device_attach(netdev
);
4716 * If the controller has AMT, do not set DRV_LOAD until the interface
4717 * is up. For all other cases, let the f/w know that the h/w is now
4718 * under the control of the driver.
4720 if (!(adapter
->flags
& FLAG_HAS_AMT
))
4721 e1000_get_hw_control(adapter
);
4727 static void e1000_shutdown(struct pci_dev
*pdev
)
4731 __e1000_shutdown(pdev
, &wake
);
4733 if (system_state
== SYSTEM_POWER_OFF
)
4734 e1000_complete_shutdown(pdev
, false, wake
);
4737 #ifdef CONFIG_NET_POLL_CONTROLLER
4739 * Polling 'interrupt' - used by things like netconsole to send skbs
4740 * without having to re-enable interrupts. It's not called while
4741 * the interrupt routine is executing.
4743 static void e1000_netpoll(struct net_device
*netdev
)
4745 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4747 disable_irq(adapter
->pdev
->irq
);
4748 e1000_intr(adapter
->pdev
->irq
, netdev
);
4750 enable_irq(adapter
->pdev
->irq
);
4755 * e1000_io_error_detected - called when PCI error is detected
4756 * @pdev: Pointer to PCI device
4757 * @state: The current pci connection state
4759 * This function is called after a PCI bus error affecting
4760 * this device has been detected.
4762 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
4763 pci_channel_state_t state
)
4765 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4766 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4768 netif_device_detach(netdev
);
4770 if (state
== pci_channel_io_perm_failure
)
4771 return PCI_ERS_RESULT_DISCONNECT
;
4773 if (netif_running(netdev
))
4774 e1000e_down(adapter
);
4775 pci_disable_device(pdev
);
4777 /* Request a slot slot reset. */
4778 return PCI_ERS_RESULT_NEED_RESET
;
4782 * e1000_io_slot_reset - called after the pci bus has been reset.
4783 * @pdev: Pointer to PCI device
4785 * Restart the card from scratch, as if from a cold-boot. Implementation
4786 * resembles the first-half of the e1000_resume routine.
4788 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
)
4790 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4791 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4792 struct e1000_hw
*hw
= &adapter
->hw
;
4794 pci_ers_result_t result
;
4796 e1000e_disable_l1aspm(pdev
);
4797 err
= pci_enable_device_mem(pdev
);
4800 "Cannot re-enable PCI device after reset.\n");
4801 result
= PCI_ERS_RESULT_DISCONNECT
;
4803 pci_set_master(pdev
);
4804 pci_restore_state(pdev
);
4805 pci_save_state(pdev
);
4807 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4808 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4810 e1000e_reset(adapter
);
4812 result
= PCI_ERS_RESULT_RECOVERED
;
4815 pci_cleanup_aer_uncorrect_error_status(pdev
);
4821 * e1000_io_resume - called when traffic can start flowing again.
4822 * @pdev: Pointer to PCI device
4824 * This callback is called when the error recovery driver tells us that
4825 * its OK to resume normal operation. Implementation resembles the
4826 * second-half of the e1000_resume routine.
4828 static void e1000_io_resume(struct pci_dev
*pdev
)
4830 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4831 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4833 e1000_init_manageability(adapter
);
4835 if (netif_running(netdev
)) {
4836 if (e1000e_up(adapter
)) {
4838 "can't bring device back up after reset\n");
4843 netif_device_attach(netdev
);
4846 * If the controller has AMT, do not set DRV_LOAD until the interface
4847 * is up. For all other cases, let the f/w know that the h/w is now
4848 * under the control of the driver.
4850 if (!(adapter
->flags
& FLAG_HAS_AMT
))
4851 e1000_get_hw_control(adapter
);
4855 static void e1000_print_device_info(struct e1000_adapter
*adapter
)
4857 struct e1000_hw
*hw
= &adapter
->hw
;
4858 struct net_device
*netdev
= adapter
->netdev
;
4861 /* print bus type/speed/width info */
4862 e_info("(PCI Express:2.5GB/s:%s) %pM\n",
4864 ((hw
->bus
.width
== e1000_bus_width_pcie_x4
) ? "Width x4" :
4868 e_info("Intel(R) PRO/%s Network Connection\n",
4869 (hw
->phy
.type
== e1000_phy_ife
) ? "10/100" : "1000");
4870 e1000e_read_pba_num(hw
, &pba_num
);
4871 e_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
4872 hw
->mac
.type
, hw
->phy
.type
, (pba_num
>> 8), (pba_num
& 0xff));
4875 static void e1000_eeprom_checks(struct e1000_adapter
*adapter
)
4877 struct e1000_hw
*hw
= &adapter
->hw
;
4881 if (hw
->mac
.type
!= e1000_82573
)
4884 ret_val
= e1000_read_nvm(hw
, NVM_INIT_CONTROL2_REG
, 1, &buf
);
4885 if (!ret_val
&& (!(le16_to_cpu(buf
) & (1 << 0)))) {
4886 /* Deep Smart Power Down (DSPD) */
4887 dev_warn(&adapter
->pdev
->dev
,
4888 "Warning: detected DSPD enabled in EEPROM\n");
4891 ret_val
= e1000_read_nvm(hw
, NVM_INIT_3GIO_3
, 1, &buf
);
4892 if (!ret_val
&& (le16_to_cpu(buf
) & (3 << 2))) {
4894 dev_warn(&adapter
->pdev
->dev
,
4895 "Warning: detected ASPM enabled in EEPROM\n");
4899 static const struct net_device_ops e1000e_netdev_ops
= {
4900 .ndo_open
= e1000_open
,
4901 .ndo_stop
= e1000_close
,
4902 .ndo_start_xmit
= e1000_xmit_frame
,
4903 .ndo_get_stats
= e1000_get_stats
,
4904 .ndo_set_multicast_list
= e1000_set_multi
,
4905 .ndo_set_mac_address
= e1000_set_mac
,
4906 .ndo_change_mtu
= e1000_change_mtu
,
4907 .ndo_do_ioctl
= e1000_ioctl
,
4908 .ndo_tx_timeout
= e1000_tx_timeout
,
4909 .ndo_validate_addr
= eth_validate_addr
,
4911 .ndo_vlan_rx_register
= e1000_vlan_rx_register
,
4912 .ndo_vlan_rx_add_vid
= e1000_vlan_rx_add_vid
,
4913 .ndo_vlan_rx_kill_vid
= e1000_vlan_rx_kill_vid
,
4914 #ifdef CONFIG_NET_POLL_CONTROLLER
4915 .ndo_poll_controller
= e1000_netpoll
,
4920 * e1000_probe - Device Initialization Routine
4921 * @pdev: PCI device information struct
4922 * @ent: entry in e1000_pci_tbl
4924 * Returns 0 on success, negative on failure
4926 * e1000_probe initializes an adapter identified by a pci_dev structure.
4927 * The OS initialization, configuring of the adapter private structure,
4928 * and a hardware reset occur.
4930 static int __devinit
e1000_probe(struct pci_dev
*pdev
,
4931 const struct pci_device_id
*ent
)
4933 struct net_device
*netdev
;
4934 struct e1000_adapter
*adapter
;
4935 struct e1000_hw
*hw
;
4936 const struct e1000_info
*ei
= e1000_info_tbl
[ent
->driver_data
];
4937 resource_size_t mmio_start
, mmio_len
;
4938 resource_size_t flash_start
, flash_len
;
4940 static int cards_found
;
4941 int i
, err
, pci_using_dac
;
4942 u16 eeprom_data
= 0;
4943 u16 eeprom_apme_mask
= E1000_EEPROM_APME
;
4945 e1000e_disable_l1aspm(pdev
);
4947 err
= pci_enable_device_mem(pdev
);
4952 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(64));
4954 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
4958 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
4960 err
= pci_set_consistent_dma_mask(pdev
,
4963 dev_err(&pdev
->dev
, "No usable DMA "
4964 "configuration, aborting\n");
4970 err
= pci_request_selected_regions_exclusive(pdev
,
4971 pci_select_bars(pdev
, IORESOURCE_MEM
),
4972 e1000e_driver_name
);
4976 /* AER (Advanced Error Reporting) hooks */
4977 pci_enable_pcie_error_reporting(pdev
);
4979 pci_set_master(pdev
);
4980 /* PCI config space info */
4981 err
= pci_save_state(pdev
);
4983 goto err_alloc_etherdev
;
4986 netdev
= alloc_etherdev(sizeof(struct e1000_adapter
));
4988 goto err_alloc_etherdev
;
4990 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
4992 pci_set_drvdata(pdev
, netdev
);
4993 adapter
= netdev_priv(netdev
);
4995 adapter
->netdev
= netdev
;
4996 adapter
->pdev
= pdev
;
4998 adapter
->pba
= ei
->pba
;
4999 adapter
->flags
= ei
->flags
;
5000 adapter
->flags2
= ei
->flags2
;
5001 adapter
->hw
.adapter
= adapter
;
5002 adapter
->hw
.mac
.type
= ei
->mac
;
5003 adapter
->max_hw_frame_size
= ei
->max_hw_frame_size
;
5004 adapter
->msg_enable
= (1 << NETIF_MSG_DRV
| NETIF_MSG_PROBE
) - 1;
5006 mmio_start
= pci_resource_start(pdev
, 0);
5007 mmio_len
= pci_resource_len(pdev
, 0);
5010 adapter
->hw
.hw_addr
= ioremap(mmio_start
, mmio_len
);
5011 if (!adapter
->hw
.hw_addr
)
5014 if ((adapter
->flags
& FLAG_HAS_FLASH
) &&
5015 (pci_resource_flags(pdev
, 1) & IORESOURCE_MEM
)) {
5016 flash_start
= pci_resource_start(pdev
, 1);
5017 flash_len
= pci_resource_len(pdev
, 1);
5018 adapter
->hw
.flash_address
= ioremap(flash_start
, flash_len
);
5019 if (!adapter
->hw
.flash_address
)
5023 /* construct the net_device struct */
5024 netdev
->netdev_ops
= &e1000e_netdev_ops
;
5025 e1000e_set_ethtool_ops(netdev
);
5026 netdev
->watchdog_timeo
= 5 * HZ
;
5027 netif_napi_add(netdev
, &adapter
->napi
, e1000_clean
, 64);
5028 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
5030 netdev
->mem_start
= mmio_start
;
5031 netdev
->mem_end
= mmio_start
+ mmio_len
;
5033 adapter
->bd_number
= cards_found
++;
5035 e1000e_check_options(adapter
);
5037 /* setup adapter struct */
5038 err
= e1000_sw_init(adapter
);
5044 memcpy(&hw
->mac
.ops
, ei
->mac_ops
, sizeof(hw
->mac
.ops
));
5045 memcpy(&hw
->nvm
.ops
, ei
->nvm_ops
, sizeof(hw
->nvm
.ops
));
5046 memcpy(&hw
->phy
.ops
, ei
->phy_ops
, sizeof(hw
->phy
.ops
));
5048 err
= ei
->get_variants(adapter
);
5052 if ((adapter
->flags
& FLAG_IS_ICH
) &&
5053 (adapter
->flags
& FLAG_READ_ONLY_NVM
))
5054 e1000e_write_protect_nvm_ich8lan(&adapter
->hw
);
5056 hw
->mac
.ops
.get_bus_info(&adapter
->hw
);
5058 adapter
->hw
.phy
.autoneg_wait_to_complete
= 0;
5060 /* Copper options */
5061 if (adapter
->hw
.phy
.media_type
== e1000_media_type_copper
) {
5062 adapter
->hw
.phy
.mdix
= AUTO_ALL_MODES
;
5063 adapter
->hw
.phy
.disable_polarity_correction
= 0;
5064 adapter
->hw
.phy
.ms_type
= e1000_ms_hw_default
;
5067 if (e1000_check_reset_block(&adapter
->hw
))
5068 e_info("PHY reset is blocked due to SOL/IDER session.\n");
5070 netdev
->features
= NETIF_F_SG
|
5072 NETIF_F_HW_VLAN_TX
|
5075 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
)
5076 netdev
->features
|= NETIF_F_HW_VLAN_FILTER
;
5078 netdev
->features
|= NETIF_F_TSO
;
5079 netdev
->features
|= NETIF_F_TSO6
;
5081 netdev
->vlan_features
|= NETIF_F_TSO
;
5082 netdev
->vlan_features
|= NETIF_F_TSO6
;
5083 netdev
->vlan_features
|= NETIF_F_HW_CSUM
;
5084 netdev
->vlan_features
|= NETIF_F_SG
;
5087 netdev
->features
|= NETIF_F_HIGHDMA
;
5089 if (e1000e_enable_mng_pass_thru(&adapter
->hw
))
5090 adapter
->flags
|= FLAG_MNG_PT_ENABLED
;
5093 * before reading the NVM, reset the controller to
5094 * put the device in a known good starting state
5096 adapter
->hw
.mac
.ops
.reset_hw(&adapter
->hw
);
5099 * systems with ASPM and others may see the checksum fail on the first
5100 * attempt. Let's give it a few tries
5103 if (e1000_validate_nvm_checksum(&adapter
->hw
) >= 0)
5106 e_err("The NVM Checksum Is Not Valid\n");
5112 e1000_eeprom_checks(adapter
);
5114 /* copy the MAC address */
5115 if (e1000e_read_mac_addr(&adapter
->hw
))
5116 e_err("NVM Read Error while reading MAC address\n");
5118 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
5119 memcpy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
5121 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
5122 e_err("Invalid MAC Address: %pM\n", netdev
->perm_addr
);
5127 init_timer(&adapter
->watchdog_timer
);
5128 adapter
->watchdog_timer
.function
= &e1000_watchdog
;
5129 adapter
->watchdog_timer
.data
= (unsigned long) adapter
;
5131 init_timer(&adapter
->phy_info_timer
);
5132 adapter
->phy_info_timer
.function
= &e1000_update_phy_info
;
5133 adapter
->phy_info_timer
.data
= (unsigned long) adapter
;
5135 INIT_WORK(&adapter
->reset_task
, e1000_reset_task
);
5136 INIT_WORK(&adapter
->watchdog_task
, e1000_watchdog_task
);
5137 INIT_WORK(&adapter
->downshift_task
, e1000e_downshift_workaround
);
5138 INIT_WORK(&adapter
->update_phy_task
, e1000e_update_phy_task
);
5139 INIT_WORK(&adapter
->print_hang_task
, e1000_print_hw_hang
);
5141 /* Initialize link parameters. User can change them with ethtool */
5142 adapter
->hw
.mac
.autoneg
= 1;
5143 adapter
->fc_autoneg
= 1;
5144 adapter
->hw
.fc
.requested_mode
= e1000_fc_default
;
5145 adapter
->hw
.fc
.current_mode
= e1000_fc_default
;
5146 adapter
->hw
.phy
.autoneg_advertised
= 0x2f;
5148 /* ring size defaults */
5149 adapter
->rx_ring
->count
= 256;
5150 adapter
->tx_ring
->count
= 256;
5153 * Initial Wake on LAN setting - If APM wake is enabled in
5154 * the EEPROM, enable the ACPI Magic Packet filter
5156 if (adapter
->flags
& FLAG_APME_IN_WUC
) {
5157 /* APME bit in EEPROM is mapped to WUC.APME */
5158 eeprom_data
= er32(WUC
);
5159 eeprom_apme_mask
= E1000_WUC_APME
;
5160 if (eeprom_data
& E1000_WUC_PHY_WAKE
)
5161 adapter
->flags2
|= FLAG2_HAS_PHY_WAKEUP
;
5162 } else if (adapter
->flags
& FLAG_APME_IN_CTRL3
) {
5163 if (adapter
->flags
& FLAG_APME_CHECK_PORT_B
&&
5164 (adapter
->hw
.bus
.func
== 1))
5165 e1000_read_nvm(&adapter
->hw
,
5166 NVM_INIT_CONTROL3_PORT_B
, 1, &eeprom_data
);
5168 e1000_read_nvm(&adapter
->hw
,
5169 NVM_INIT_CONTROL3_PORT_A
, 1, &eeprom_data
);
5172 /* fetch WoL from EEPROM */
5173 if (eeprom_data
& eeprom_apme_mask
)
5174 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
5177 * now that we have the eeprom settings, apply the special cases
5178 * where the eeprom may be wrong or the board simply won't support
5179 * wake on lan on a particular port
5181 if (!(adapter
->flags
& FLAG_HAS_WOL
))
5182 adapter
->eeprom_wol
= 0;
5184 /* initialize the wol settings based on the eeprom settings */
5185 adapter
->wol
= adapter
->eeprom_wol
;
5186 device_set_wakeup_enable(&adapter
->pdev
->dev
, adapter
->wol
);
5188 /* save off EEPROM version number */
5189 e1000_read_nvm(&adapter
->hw
, 5, 1, &adapter
->eeprom_vers
);
5191 /* reset the hardware with the new settings */
5192 e1000e_reset(adapter
);
5195 * If the controller has AMT, do not set DRV_LOAD until the interface
5196 * is up. For all other cases, let the f/w know that the h/w is now
5197 * under the control of the driver.
5199 if (!(adapter
->flags
& FLAG_HAS_AMT
))
5200 e1000_get_hw_control(adapter
);
5202 strcpy(netdev
->name
, "eth%d");
5203 err
= register_netdev(netdev
);
5207 /* carrier off reporting is important to ethtool even BEFORE open */
5208 netif_carrier_off(netdev
);
5210 e1000_print_device_info(adapter
);
5215 if (!(adapter
->flags
& FLAG_HAS_AMT
))
5216 e1000_release_hw_control(adapter
);
5218 if (!e1000_check_reset_block(&adapter
->hw
))
5219 e1000_phy_hw_reset(&adapter
->hw
);
5222 kfree(adapter
->tx_ring
);
5223 kfree(adapter
->rx_ring
);
5225 if (adapter
->hw
.flash_address
)
5226 iounmap(adapter
->hw
.flash_address
);
5227 e1000e_reset_interrupt_capability(adapter
);
5229 iounmap(adapter
->hw
.hw_addr
);
5231 free_netdev(netdev
);
5233 pci_release_selected_regions(pdev
,
5234 pci_select_bars(pdev
, IORESOURCE_MEM
));
5237 pci_disable_device(pdev
);
5242 * e1000_remove - Device Removal Routine
5243 * @pdev: PCI device information struct
5245 * e1000_remove is called by the PCI subsystem to alert the driver
5246 * that it should release a PCI device. The could be caused by a
5247 * Hot-Plug event, or because the driver is going to be removed from
5250 static void __devexit
e1000_remove(struct pci_dev
*pdev
)
5252 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5253 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5256 * flush_scheduled work may reschedule our watchdog task, so
5257 * explicitly disable watchdog tasks from being rescheduled
5259 set_bit(__E1000_DOWN
, &adapter
->state
);
5260 del_timer_sync(&adapter
->watchdog_timer
);
5261 del_timer_sync(&adapter
->phy_info_timer
);
5263 cancel_work_sync(&adapter
->reset_task
);
5264 cancel_work_sync(&adapter
->watchdog_task
);
5265 cancel_work_sync(&adapter
->downshift_task
);
5266 cancel_work_sync(&adapter
->update_phy_task
);
5267 cancel_work_sync(&adapter
->print_hang_task
);
5268 flush_scheduled_work();
5270 if (!(netdev
->flags
& IFF_UP
))
5271 e1000_power_down_phy(adapter
);
5273 unregister_netdev(netdev
);
5276 * Release control of h/w to f/w. If f/w is AMT enabled, this
5277 * would have already happened in close and is redundant.
5279 e1000_release_hw_control(adapter
);
5281 e1000e_reset_interrupt_capability(adapter
);
5282 kfree(adapter
->tx_ring
);
5283 kfree(adapter
->rx_ring
);
5285 iounmap(adapter
->hw
.hw_addr
);
5286 if (adapter
->hw
.flash_address
)
5287 iounmap(adapter
->hw
.flash_address
);
5288 pci_release_selected_regions(pdev
,
5289 pci_select_bars(pdev
, IORESOURCE_MEM
));
5291 free_netdev(netdev
);
5294 pci_disable_pcie_error_reporting(pdev
);
5296 pci_disable_device(pdev
);
5299 /* PCI Error Recovery (ERS) */
5300 static struct pci_error_handlers e1000_err_handler
= {
5301 .error_detected
= e1000_io_error_detected
,
5302 .slot_reset
= e1000_io_slot_reset
,
5303 .resume
= e1000_io_resume
,
5306 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl
) = {
5307 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_COPPER
), board_82571
},
5308 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_FIBER
), board_82571
},
5309 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_QUAD_COPPER
), board_82571
},
5310 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_QUAD_COPPER_LP
), board_82571
},
5311 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_QUAD_FIBER
), board_82571
},
5312 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_SERDES
), board_82571
},
5313 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_SERDES_DUAL
), board_82571
},
5314 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_SERDES_QUAD
), board_82571
},
5315 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571PT_QUAD_COPPER
), board_82571
},
5317 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI
), board_82572
},
5318 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI_COPPER
), board_82572
},
5319 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI_FIBER
), board_82572
},
5320 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI_SERDES
), board_82572
},
5322 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82573E
), board_82573
},
5323 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82573E_IAMT
), board_82573
},
5324 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82573L
), board_82573
},
5326 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82574L
), board_82574
},
5327 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82574LA
), board_82574
},
5328 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82583V
), board_82583
},
5330 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_COPPER_DPT
),
5331 board_80003es2lan
},
5332 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_COPPER_SPT
),
5333 board_80003es2lan
},
5334 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_SERDES_DPT
),
5335 board_80003es2lan
},
5336 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_SERDES_SPT
),
5337 board_80003es2lan
},
5339 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IFE
), board_ich8lan
},
5340 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IFE_G
), board_ich8lan
},
5341 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IFE_GT
), board_ich8lan
},
5342 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_AMT
), board_ich8lan
},
5343 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_C
), board_ich8lan
},
5344 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_M
), board_ich8lan
},
5345 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_M_AMT
), board_ich8lan
},
5346 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_82567V_3
), board_ich8lan
},
5348 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IFE
), board_ich9lan
},
5349 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IFE_G
), board_ich9lan
},
5350 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IFE_GT
), board_ich9lan
},
5351 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_AMT
), board_ich9lan
},
5352 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_C
), board_ich9lan
},
5353 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_BM
), board_ich9lan
},
5354 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_M
), board_ich9lan
},
5355 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_M_AMT
), board_ich9lan
},
5356 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_M_V
), board_ich9lan
},
5358 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_R_BM_LM
), board_ich9lan
},
5359 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_R_BM_LF
), board_ich9lan
},
5360 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_R_BM_V
), board_ich9lan
},
5362 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_D_BM_LM
), board_ich10lan
},
5363 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_D_BM_LF
), board_ich10lan
},
5365 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_M_HV_LM
), board_pchlan
},
5366 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_M_HV_LC
), board_pchlan
},
5367 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_D_HV_DM
), board_pchlan
},
5368 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_D_HV_DC
), board_pchlan
},
5370 { } /* terminate list */
5372 MODULE_DEVICE_TABLE(pci
, e1000_pci_tbl
);
5374 /* PCI Device API Driver */
5375 static struct pci_driver e1000_driver
= {
5376 .name
= e1000e_driver_name
,
5377 .id_table
= e1000_pci_tbl
,
5378 .probe
= e1000_probe
,
5379 .remove
= __devexit_p(e1000_remove
),
5381 /* Power Management Hooks */
5382 .suspend
= e1000_suspend
,
5383 .resume
= e1000_resume
,
5385 .shutdown
= e1000_shutdown
,
5386 .err_handler
= &e1000_err_handler
5390 * e1000_init_module - Driver Registration Routine
5392 * e1000_init_module is the first routine called when the driver is
5393 * loaded. All it does is register with the PCI subsystem.
5395 static int __init
e1000_init_module(void)
5398 printk(KERN_INFO
"%s: Intel(R) PRO/1000 Network Driver - %s\n",
5399 e1000e_driver_name
, e1000e_driver_version
);
5400 printk(KERN_INFO
"%s: Copyright (c) 1999 - 2009 Intel Corporation.\n",
5401 e1000e_driver_name
);
5402 ret
= pci_register_driver(&e1000_driver
);
5406 module_init(e1000_init_module
);
5409 * e1000_exit_module - Driver Exit Cleanup Routine
5411 * e1000_exit_module is called just before the driver is removed
5414 static void __exit
e1000_exit_module(void)
5416 pci_unregister_driver(&e1000_driver
);
5418 module_exit(e1000_exit_module
);
5421 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
5422 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
5423 MODULE_LICENSE("GPL");
5424 MODULE_VERSION(DRV_VERSION
);