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 <net/checksum.h>
40 #include <net/ip6_checksum.h>
41 #include <linux/mii.h>
42 #include <linux/ethtool.h>
43 #include <linux/if_vlan.h>
44 #include <linux/cpu.h>
45 #include <linux/smp.h>
46 #include <linux/pm_qos_params.h>
47 #include <linux/aer.h>
51 #define DRV_VERSION "1.0.2-k2"
52 char e1000e_driver_name
[] = "e1000e";
53 const char e1000e_driver_version
[] = DRV_VERSION
;
55 static const struct e1000_info
*e1000_info_tbl
[] = {
56 [board_82571
] = &e1000_82571_info
,
57 [board_82572
] = &e1000_82572_info
,
58 [board_82573
] = &e1000_82573_info
,
59 [board_82574
] = &e1000_82574_info
,
60 [board_82583
] = &e1000_82583_info
,
61 [board_80003es2lan
] = &e1000_es2_info
,
62 [board_ich8lan
] = &e1000_ich8_info
,
63 [board_ich9lan
] = &e1000_ich9_info
,
64 [board_ich10lan
] = &e1000_ich10_info
,
65 [board_pchlan
] = &e1000_pch_info
,
69 * e1000_desc_unused - calculate if we have unused descriptors
71 static int e1000_desc_unused(struct e1000_ring
*ring
)
73 if (ring
->next_to_clean
> ring
->next_to_use
)
74 return ring
->next_to_clean
- ring
->next_to_use
- 1;
76 return ring
->count
+ ring
->next_to_clean
- ring
->next_to_use
- 1;
80 * e1000_receive_skb - helper function to handle Rx indications
81 * @adapter: board private structure
82 * @status: descriptor status field as written by hardware
83 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
84 * @skb: pointer to sk_buff to be indicated to stack
86 static void e1000_receive_skb(struct e1000_adapter
*adapter
,
87 struct net_device
*netdev
,
89 u8 status
, __le16 vlan
)
91 skb
->protocol
= eth_type_trans(skb
, netdev
);
93 if (adapter
->vlgrp
&& (status
& E1000_RXD_STAT_VP
))
94 vlan_gro_receive(&adapter
->napi
, adapter
->vlgrp
,
95 le16_to_cpu(vlan
), skb
);
97 napi_gro_receive(&adapter
->napi
, skb
);
101 * e1000_rx_checksum - Receive Checksum Offload for 82543
102 * @adapter: board private structure
103 * @status_err: receive descriptor status and error fields
104 * @csum: receive descriptor csum field
105 * @sk_buff: socket buffer with received data
107 static void e1000_rx_checksum(struct e1000_adapter
*adapter
, u32 status_err
,
108 u32 csum
, struct sk_buff
*skb
)
110 u16 status
= (u16
)status_err
;
111 u8 errors
= (u8
)(status_err
>> 24);
112 skb
->ip_summed
= CHECKSUM_NONE
;
114 /* Ignore Checksum bit is set */
115 if (status
& E1000_RXD_STAT_IXSM
)
117 /* TCP/UDP checksum error bit is set */
118 if (errors
& E1000_RXD_ERR_TCPE
) {
119 /* let the stack verify checksum errors */
120 adapter
->hw_csum_err
++;
124 /* TCP/UDP Checksum has not been calculated */
125 if (!(status
& (E1000_RXD_STAT_TCPCS
| E1000_RXD_STAT_UDPCS
)))
128 /* It must be a TCP or UDP packet with a valid checksum */
129 if (status
& E1000_RXD_STAT_TCPCS
) {
130 /* TCP checksum is good */
131 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
134 * IP fragment with UDP payload
135 * Hardware complements the payload checksum, so we undo it
136 * and then put the value in host order for further stack use.
138 __sum16 sum
= (__force __sum16
)htons(csum
);
139 skb
->csum
= csum_unfold(~sum
);
140 skb
->ip_summed
= CHECKSUM_COMPLETE
;
142 adapter
->hw_csum_good
++;
146 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
147 * @adapter: address of board private structure
149 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
152 struct net_device
*netdev
= adapter
->netdev
;
153 struct pci_dev
*pdev
= adapter
->pdev
;
154 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
155 struct e1000_rx_desc
*rx_desc
;
156 struct e1000_buffer
*buffer_info
;
159 unsigned int bufsz
= adapter
->rx_buffer_len
;
161 i
= rx_ring
->next_to_use
;
162 buffer_info
= &rx_ring
->buffer_info
[i
];
164 while (cleaned_count
--) {
165 skb
= buffer_info
->skb
;
171 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
173 /* Better luck next round */
174 adapter
->alloc_rx_buff_failed
++;
178 buffer_info
->skb
= skb
;
180 buffer_info
->dma
= pci_map_single(pdev
, skb
->data
,
181 adapter
->rx_buffer_len
,
183 if (pci_dma_mapping_error(pdev
, buffer_info
->dma
)) {
184 dev_err(&pdev
->dev
, "RX DMA map failed\n");
185 adapter
->rx_dma_failed
++;
189 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
190 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
193 if (i
== rx_ring
->count
)
195 buffer_info
= &rx_ring
->buffer_info
[i
];
198 if (rx_ring
->next_to_use
!= i
) {
199 rx_ring
->next_to_use
= i
;
201 i
= (rx_ring
->count
- 1);
204 * Force memory writes to complete before letting h/w
205 * know there are new descriptors to fetch. (Only
206 * applicable for weak-ordered memory model archs,
210 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
215 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
216 * @adapter: address of board private structure
218 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter
*adapter
,
221 struct net_device
*netdev
= adapter
->netdev
;
222 struct pci_dev
*pdev
= adapter
->pdev
;
223 union e1000_rx_desc_packet_split
*rx_desc
;
224 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
225 struct e1000_buffer
*buffer_info
;
226 struct e1000_ps_page
*ps_page
;
230 i
= rx_ring
->next_to_use
;
231 buffer_info
= &rx_ring
->buffer_info
[i
];
233 while (cleaned_count
--) {
234 rx_desc
= E1000_RX_DESC_PS(*rx_ring
, i
);
236 for (j
= 0; j
< PS_PAGE_BUFFERS
; j
++) {
237 ps_page
= &buffer_info
->ps_pages
[j
];
238 if (j
>= adapter
->rx_ps_pages
) {
239 /* all unused desc entries get hw null ptr */
240 rx_desc
->read
.buffer_addr
[j
+1] = ~cpu_to_le64(0);
243 if (!ps_page
->page
) {
244 ps_page
->page
= alloc_page(GFP_ATOMIC
);
245 if (!ps_page
->page
) {
246 adapter
->alloc_rx_buff_failed
++;
249 ps_page
->dma
= pci_map_page(pdev
,
253 if (pci_dma_mapping_error(pdev
, ps_page
->dma
)) {
254 dev_err(&adapter
->pdev
->dev
,
255 "RX DMA page map failed\n");
256 adapter
->rx_dma_failed
++;
261 * Refresh the desc even if buffer_addrs
262 * didn't change because each write-back
265 rx_desc
->read
.buffer_addr
[j
+1] =
266 cpu_to_le64(ps_page
->dma
);
269 skb
= netdev_alloc_skb_ip_align(netdev
,
270 adapter
->rx_ps_bsize0
);
273 adapter
->alloc_rx_buff_failed
++;
277 buffer_info
->skb
= skb
;
278 buffer_info
->dma
= pci_map_single(pdev
, skb
->data
,
279 adapter
->rx_ps_bsize0
,
281 if (pci_dma_mapping_error(pdev
, buffer_info
->dma
)) {
282 dev_err(&pdev
->dev
, "RX DMA map failed\n");
283 adapter
->rx_dma_failed
++;
285 dev_kfree_skb_any(skb
);
286 buffer_info
->skb
= NULL
;
290 rx_desc
->read
.buffer_addr
[0] = cpu_to_le64(buffer_info
->dma
);
293 if (i
== rx_ring
->count
)
295 buffer_info
= &rx_ring
->buffer_info
[i
];
299 if (rx_ring
->next_to_use
!= i
) {
300 rx_ring
->next_to_use
= i
;
303 i
= (rx_ring
->count
- 1);
306 * Force memory writes to complete before letting h/w
307 * know there are new descriptors to fetch. (Only
308 * applicable for weak-ordered memory model archs,
313 * Hardware increments by 16 bytes, but packet split
314 * descriptors are 32 bytes...so we increment tail
317 writel(i
<<1, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
322 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
323 * @adapter: address of board private structure
324 * @cleaned_count: number of buffers to allocate this pass
327 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
330 struct net_device
*netdev
= adapter
->netdev
;
331 struct pci_dev
*pdev
= adapter
->pdev
;
332 struct e1000_rx_desc
*rx_desc
;
333 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
334 struct e1000_buffer
*buffer_info
;
337 unsigned int bufsz
= 256 - 16 /* for skb_reserve */;
339 i
= rx_ring
->next_to_use
;
340 buffer_info
= &rx_ring
->buffer_info
[i
];
342 while (cleaned_count
--) {
343 skb
= buffer_info
->skb
;
349 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
350 if (unlikely(!skb
)) {
351 /* Better luck next round */
352 adapter
->alloc_rx_buff_failed
++;
356 buffer_info
->skb
= skb
;
358 /* allocate a new page if necessary */
359 if (!buffer_info
->page
) {
360 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
361 if (unlikely(!buffer_info
->page
)) {
362 adapter
->alloc_rx_buff_failed
++;
367 if (!buffer_info
->dma
)
368 buffer_info
->dma
= pci_map_page(pdev
,
369 buffer_info
->page
, 0,
373 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
374 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
376 if (unlikely(++i
== rx_ring
->count
))
378 buffer_info
= &rx_ring
->buffer_info
[i
];
381 if (likely(rx_ring
->next_to_use
!= i
)) {
382 rx_ring
->next_to_use
= i
;
383 if (unlikely(i
-- == 0))
384 i
= (rx_ring
->count
- 1);
386 /* Force memory writes to complete before letting h/w
387 * know there are new descriptors to fetch. (Only
388 * applicable for weak-ordered memory model archs,
391 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
396 * e1000_clean_rx_irq - Send received data up the network stack; legacy
397 * @adapter: board private structure
399 * the return value indicates whether actual cleaning was done, there
400 * is no guarantee that everything was cleaned
402 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
403 int *work_done
, int work_to_do
)
405 struct net_device
*netdev
= adapter
->netdev
;
406 struct pci_dev
*pdev
= adapter
->pdev
;
407 struct e1000_hw
*hw
= &adapter
->hw
;
408 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
409 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
410 struct e1000_buffer
*buffer_info
, *next_buffer
;
413 int cleaned_count
= 0;
415 unsigned int total_rx_bytes
= 0, total_rx_packets
= 0;
417 i
= rx_ring
->next_to_clean
;
418 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
419 buffer_info
= &rx_ring
->buffer_info
[i
];
421 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
425 if (*work_done
>= work_to_do
)
429 status
= rx_desc
->status
;
430 skb
= buffer_info
->skb
;
431 buffer_info
->skb
= NULL
;
433 prefetch(skb
->data
- NET_IP_ALIGN
);
436 if (i
== rx_ring
->count
)
438 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
441 next_buffer
= &rx_ring
->buffer_info
[i
];
445 pci_unmap_single(pdev
,
447 adapter
->rx_buffer_len
,
449 buffer_info
->dma
= 0;
451 length
= le16_to_cpu(rx_desc
->length
);
454 * !EOP means multiple descriptors were used to store a single
455 * packet, if that's the case we need to toss it. In fact, we
456 * need to toss every packet with the EOP bit clear and the
457 * next frame that _does_ have the EOP bit set, as it is by
458 * definition only a frame fragment
460 if (unlikely(!(status
& E1000_RXD_STAT_EOP
)))
461 adapter
->flags2
|= FLAG2_IS_DISCARDING
;
463 if (adapter
->flags2
& FLAG2_IS_DISCARDING
) {
464 /* All receives must fit into a single buffer */
465 e_dbg("Receive packet consumed multiple buffers\n");
467 buffer_info
->skb
= skb
;
468 if (status
& E1000_RXD_STAT_EOP
)
469 adapter
->flags2
&= ~FLAG2_IS_DISCARDING
;
473 if (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
) {
475 buffer_info
->skb
= skb
;
479 /* adjust length to remove Ethernet CRC */
480 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
))
483 total_rx_bytes
+= length
;
487 * code added for copybreak, this should improve
488 * performance for small packets with large amounts
489 * of reassembly being done in the stack
491 if (length
< copybreak
) {
492 struct sk_buff
*new_skb
=
493 netdev_alloc_skb_ip_align(netdev
, length
);
495 skb_copy_to_linear_data_offset(new_skb
,
501 /* save the skb in buffer_info as good */
502 buffer_info
->skb
= skb
;
505 /* else just continue with the old one */
507 /* end copybreak code */
508 skb_put(skb
, length
);
510 /* Receive Checksum Offload */
511 e1000_rx_checksum(adapter
,
513 ((u32
)(rx_desc
->errors
) << 24),
514 le16_to_cpu(rx_desc
->csum
), skb
);
516 e1000_receive_skb(adapter
, netdev
, skb
,status
,rx_desc
->special
);
521 /* return some buffers to hardware, one at a time is too slow */
522 if (cleaned_count
>= E1000_RX_BUFFER_WRITE
) {
523 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
527 /* use prefetched values */
529 buffer_info
= next_buffer
;
531 rx_ring
->next_to_clean
= i
;
533 cleaned_count
= e1000_desc_unused(rx_ring
);
535 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
537 adapter
->total_rx_bytes
+= total_rx_bytes
;
538 adapter
->total_rx_packets
+= total_rx_packets
;
539 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
540 netdev
->stats
.rx_packets
+= total_rx_packets
;
544 static void e1000_put_txbuf(struct e1000_adapter
*adapter
,
545 struct e1000_buffer
*buffer_info
)
547 if (buffer_info
->dma
) {
548 if (buffer_info
->mapped_as_page
)
549 pci_unmap_page(adapter
->pdev
, buffer_info
->dma
,
550 buffer_info
->length
, PCI_DMA_TODEVICE
);
552 pci_unmap_single(adapter
->pdev
, buffer_info
->dma
,
555 buffer_info
->dma
= 0;
557 if (buffer_info
->skb
) {
558 dev_kfree_skb_any(buffer_info
->skb
);
559 buffer_info
->skb
= NULL
;
561 buffer_info
->time_stamp
= 0;
564 static void e1000_print_hw_hang(struct work_struct
*work
)
566 struct e1000_adapter
*adapter
= container_of(work
,
567 struct e1000_adapter
,
569 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
570 unsigned int i
= tx_ring
->next_to_clean
;
571 unsigned int eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
572 struct e1000_tx_desc
*eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
573 struct e1000_hw
*hw
= &adapter
->hw
;
574 u16 phy_status
, phy_1000t_status
, phy_ext_status
;
577 e1e_rphy(hw
, PHY_STATUS
, &phy_status
);
578 e1e_rphy(hw
, PHY_1000T_STATUS
, &phy_1000t_status
);
579 e1e_rphy(hw
, PHY_EXT_STATUS
, &phy_ext_status
);
581 pci_read_config_word(adapter
->pdev
, PCI_STATUS
, &pci_status
);
583 /* detected Hardware unit hang */
584 e_err("Detected Hardware Unit Hang:\n"
587 " next_to_use <%x>\n"
588 " next_to_clean <%x>\n"
589 "buffer_info[next_to_clean]:\n"
590 " time_stamp <%lx>\n"
591 " next_to_watch <%x>\n"
593 " next_to_watch.status <%x>\n"
596 "PHY 1000BASE-T Status <%x>\n"
597 "PHY Extended Status <%x>\n"
599 readl(adapter
->hw
.hw_addr
+ tx_ring
->head
),
600 readl(adapter
->hw
.hw_addr
+ tx_ring
->tail
),
601 tx_ring
->next_to_use
,
602 tx_ring
->next_to_clean
,
603 tx_ring
->buffer_info
[eop
].time_stamp
,
606 eop_desc
->upper
.fields
.status
,
615 * e1000_clean_tx_irq - Reclaim resources after transmit completes
616 * @adapter: board private structure
618 * the return value indicates whether actual cleaning was done, there
619 * is no guarantee that everything was cleaned
621 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
)
623 struct net_device
*netdev
= adapter
->netdev
;
624 struct e1000_hw
*hw
= &adapter
->hw
;
625 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
626 struct e1000_tx_desc
*tx_desc
, *eop_desc
;
627 struct e1000_buffer
*buffer_info
;
629 unsigned int count
= 0;
630 unsigned int total_tx_bytes
= 0, total_tx_packets
= 0;
632 i
= tx_ring
->next_to_clean
;
633 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
634 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
636 while ((eop_desc
->upper
.data
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
637 (count
< tx_ring
->count
)) {
638 bool cleaned
= false;
639 for (; !cleaned
; count
++) {
640 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
641 buffer_info
= &tx_ring
->buffer_info
[i
];
642 cleaned
= (i
== eop
);
645 struct sk_buff
*skb
= buffer_info
->skb
;
646 unsigned int segs
, bytecount
;
647 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
648 /* multiply data chunks by size of headers */
649 bytecount
= ((segs
- 1) * skb_headlen(skb
)) +
651 total_tx_packets
+= segs
;
652 total_tx_bytes
+= bytecount
;
655 e1000_put_txbuf(adapter
, buffer_info
);
656 tx_desc
->upper
.data
= 0;
659 if (i
== tx_ring
->count
)
663 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
664 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
667 tx_ring
->next_to_clean
= i
;
669 #define TX_WAKE_THRESHOLD 32
670 if (count
&& netif_carrier_ok(netdev
) &&
671 e1000_desc_unused(tx_ring
) >= TX_WAKE_THRESHOLD
) {
672 /* Make sure that anybody stopping the queue after this
673 * sees the new next_to_clean.
677 if (netif_queue_stopped(netdev
) &&
678 !(test_bit(__E1000_DOWN
, &adapter
->state
))) {
679 netif_wake_queue(netdev
);
680 ++adapter
->restart_queue
;
684 if (adapter
->detect_tx_hung
) {
686 * Detect a transmit hang in hardware, this serializes the
687 * check with the clearing of time_stamp and movement of i
689 adapter
->detect_tx_hung
= 0;
690 if (tx_ring
->buffer_info
[i
].time_stamp
&&
691 time_after(jiffies
, tx_ring
->buffer_info
[i
].time_stamp
692 + (adapter
->tx_timeout_factor
* HZ
)) &&
693 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
694 schedule_work(&adapter
->print_hang_task
);
695 netif_stop_queue(netdev
);
698 adapter
->total_tx_bytes
+= total_tx_bytes
;
699 adapter
->total_tx_packets
+= total_tx_packets
;
700 netdev
->stats
.tx_bytes
+= total_tx_bytes
;
701 netdev
->stats
.tx_packets
+= total_tx_packets
;
702 return (count
< tx_ring
->count
);
706 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
707 * @adapter: board private structure
709 * the return value indicates whether actual cleaning was done, there
710 * is no guarantee that everything was cleaned
712 static bool e1000_clean_rx_irq_ps(struct e1000_adapter
*adapter
,
713 int *work_done
, int work_to_do
)
715 struct e1000_hw
*hw
= &adapter
->hw
;
716 union e1000_rx_desc_packet_split
*rx_desc
, *next_rxd
;
717 struct net_device
*netdev
= adapter
->netdev
;
718 struct pci_dev
*pdev
= adapter
->pdev
;
719 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
720 struct e1000_buffer
*buffer_info
, *next_buffer
;
721 struct e1000_ps_page
*ps_page
;
725 int cleaned_count
= 0;
727 unsigned int total_rx_bytes
= 0, total_rx_packets
= 0;
729 i
= rx_ring
->next_to_clean
;
730 rx_desc
= E1000_RX_DESC_PS(*rx_ring
, i
);
731 staterr
= le32_to_cpu(rx_desc
->wb
.middle
.status_error
);
732 buffer_info
= &rx_ring
->buffer_info
[i
];
734 while (staterr
& E1000_RXD_STAT_DD
) {
735 if (*work_done
>= work_to_do
)
738 skb
= buffer_info
->skb
;
740 /* in the packet split case this is header only */
741 prefetch(skb
->data
- NET_IP_ALIGN
);
744 if (i
== rx_ring
->count
)
746 next_rxd
= E1000_RX_DESC_PS(*rx_ring
, i
);
749 next_buffer
= &rx_ring
->buffer_info
[i
];
753 pci_unmap_single(pdev
, buffer_info
->dma
,
754 adapter
->rx_ps_bsize0
,
756 buffer_info
->dma
= 0;
758 /* see !EOP comment in other rx routine */
759 if (!(staterr
& E1000_RXD_STAT_EOP
))
760 adapter
->flags2
|= FLAG2_IS_DISCARDING
;
762 if (adapter
->flags2
& FLAG2_IS_DISCARDING
) {
763 e_dbg("Packet Split buffers didn't pick up the full "
765 dev_kfree_skb_irq(skb
);
766 if (staterr
& E1000_RXD_STAT_EOP
)
767 adapter
->flags2
&= ~FLAG2_IS_DISCARDING
;
771 if (staterr
& E1000_RXDEXT_ERR_FRAME_ERR_MASK
) {
772 dev_kfree_skb_irq(skb
);
776 length
= le16_to_cpu(rx_desc
->wb
.middle
.length0
);
779 e_dbg("Last part of the packet spanning multiple "
781 dev_kfree_skb_irq(skb
);
786 skb_put(skb
, length
);
790 * this looks ugly, but it seems compiler issues make it
791 * more efficient than reusing j
793 int l1
= le16_to_cpu(rx_desc
->wb
.upper
.length
[0]);
796 * page alloc/put takes too long and effects small packet
797 * throughput, so unsplit small packets and save the alloc/put
798 * only valid in softirq (napi) context to call kmap_*
800 if (l1
&& (l1
<= copybreak
) &&
801 ((length
+ l1
) <= adapter
->rx_ps_bsize0
)) {
804 ps_page
= &buffer_info
->ps_pages
[0];
807 * there is no documentation about how to call
808 * kmap_atomic, so we can't hold the mapping
811 pci_dma_sync_single_for_cpu(pdev
, ps_page
->dma
,
812 PAGE_SIZE
, PCI_DMA_FROMDEVICE
);
813 vaddr
= kmap_atomic(ps_page
->page
, KM_SKB_DATA_SOFTIRQ
);
814 memcpy(skb_tail_pointer(skb
), vaddr
, l1
);
815 kunmap_atomic(vaddr
, KM_SKB_DATA_SOFTIRQ
);
816 pci_dma_sync_single_for_device(pdev
, ps_page
->dma
,
817 PAGE_SIZE
, PCI_DMA_FROMDEVICE
);
820 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
))
828 for (j
= 0; j
< PS_PAGE_BUFFERS
; j
++) {
829 length
= le16_to_cpu(rx_desc
->wb
.upper
.length
[j
]);
833 ps_page
= &buffer_info
->ps_pages
[j
];
834 pci_unmap_page(pdev
, ps_page
->dma
, PAGE_SIZE
,
837 skb_fill_page_desc(skb
, j
, ps_page
->page
, 0, length
);
838 ps_page
->page
= NULL
;
840 skb
->data_len
+= length
;
841 skb
->truesize
+= length
;
844 /* strip the ethernet crc, problem is we're using pages now so
845 * this whole operation can get a little cpu intensive
847 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
))
848 pskb_trim(skb
, skb
->len
- 4);
851 total_rx_bytes
+= skb
->len
;
854 e1000_rx_checksum(adapter
, staterr
, le16_to_cpu(
855 rx_desc
->wb
.lower
.hi_dword
.csum_ip
.csum
), skb
);
857 if (rx_desc
->wb
.upper
.header_status
&
858 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP
))
859 adapter
->rx_hdr_split
++;
861 e1000_receive_skb(adapter
, netdev
, skb
,
862 staterr
, rx_desc
->wb
.middle
.vlan
);
865 rx_desc
->wb
.middle
.status_error
&= cpu_to_le32(~0xFF);
866 buffer_info
->skb
= NULL
;
868 /* return some buffers to hardware, one at a time is too slow */
869 if (cleaned_count
>= E1000_RX_BUFFER_WRITE
) {
870 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
874 /* use prefetched values */
876 buffer_info
= next_buffer
;
878 staterr
= le32_to_cpu(rx_desc
->wb
.middle
.status_error
);
880 rx_ring
->next_to_clean
= i
;
882 cleaned_count
= e1000_desc_unused(rx_ring
);
884 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
886 adapter
->total_rx_bytes
+= total_rx_bytes
;
887 adapter
->total_rx_packets
+= total_rx_packets
;
888 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
889 netdev
->stats
.rx_packets
+= total_rx_packets
;
894 * e1000_consume_page - helper function
896 static void e1000_consume_page(struct e1000_buffer
*bi
, struct sk_buff
*skb
,
901 skb
->data_len
+= length
;
902 skb
->truesize
+= length
;
906 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
907 * @adapter: board private structure
909 * the return value indicates whether actual cleaning was done, there
910 * is no guarantee that everything was cleaned
913 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
914 int *work_done
, int work_to_do
)
916 struct net_device
*netdev
= adapter
->netdev
;
917 struct pci_dev
*pdev
= adapter
->pdev
;
918 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
919 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
920 struct e1000_buffer
*buffer_info
, *next_buffer
;
923 int cleaned_count
= 0;
924 bool cleaned
= false;
925 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
927 i
= rx_ring
->next_to_clean
;
928 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
929 buffer_info
= &rx_ring
->buffer_info
[i
];
931 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
935 if (*work_done
>= work_to_do
)
939 status
= rx_desc
->status
;
940 skb
= buffer_info
->skb
;
941 buffer_info
->skb
= NULL
;
944 if (i
== rx_ring
->count
)
946 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
949 next_buffer
= &rx_ring
->buffer_info
[i
];
953 pci_unmap_page(pdev
, buffer_info
->dma
, PAGE_SIZE
,
955 buffer_info
->dma
= 0;
957 length
= le16_to_cpu(rx_desc
->length
);
959 /* errors is only valid for DD + EOP descriptors */
960 if (unlikely((status
& E1000_RXD_STAT_EOP
) &&
961 (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
))) {
962 /* recycle both page and skb */
963 buffer_info
->skb
= skb
;
964 /* an error means any chain goes out the window
966 if (rx_ring
->rx_skb_top
)
967 dev_kfree_skb(rx_ring
->rx_skb_top
);
968 rx_ring
->rx_skb_top
= NULL
;
972 #define rxtop rx_ring->rx_skb_top
973 if (!(status
& E1000_RXD_STAT_EOP
)) {
974 /* this descriptor is only the beginning (or middle) */
976 /* this is the beginning of a chain */
978 skb_fill_page_desc(rxtop
, 0, buffer_info
->page
,
981 /* this is the middle of a chain */
982 skb_fill_page_desc(rxtop
,
983 skb_shinfo(rxtop
)->nr_frags
,
984 buffer_info
->page
, 0, length
);
985 /* re-use the skb, only consumed the page */
986 buffer_info
->skb
= skb
;
988 e1000_consume_page(buffer_info
, rxtop
, length
);
992 /* end of the chain */
993 skb_fill_page_desc(rxtop
,
994 skb_shinfo(rxtop
)->nr_frags
,
995 buffer_info
->page
, 0, length
);
996 /* re-use the current skb, we only consumed the
998 buffer_info
->skb
= skb
;
1001 e1000_consume_page(buffer_info
, skb
, length
);
1003 /* no chain, got EOP, this buf is the packet
1004 * copybreak to save the put_page/alloc_page */
1005 if (length
<= copybreak
&&
1006 skb_tailroom(skb
) >= length
) {
1008 vaddr
= kmap_atomic(buffer_info
->page
,
1009 KM_SKB_DATA_SOFTIRQ
);
1010 memcpy(skb_tail_pointer(skb
), vaddr
,
1012 kunmap_atomic(vaddr
,
1013 KM_SKB_DATA_SOFTIRQ
);
1014 /* re-use the page, so don't erase
1015 * buffer_info->page */
1016 skb_put(skb
, length
);
1018 skb_fill_page_desc(skb
, 0,
1019 buffer_info
->page
, 0,
1021 e1000_consume_page(buffer_info
, skb
,
1027 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1028 e1000_rx_checksum(adapter
,
1030 ((u32
)(rx_desc
->errors
) << 24),
1031 le16_to_cpu(rx_desc
->csum
), skb
);
1033 /* probably a little skewed due to removing CRC */
1034 total_rx_bytes
+= skb
->len
;
1037 /* eth type trans needs skb->data to point to something */
1038 if (!pskb_may_pull(skb
, ETH_HLEN
)) {
1039 e_err("pskb_may_pull failed.\n");
1044 e1000_receive_skb(adapter
, netdev
, skb
, status
,
1048 rx_desc
->status
= 0;
1050 /* return some buffers to hardware, one at a time is too slow */
1051 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
1052 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
1056 /* use prefetched values */
1058 buffer_info
= next_buffer
;
1060 rx_ring
->next_to_clean
= i
;
1062 cleaned_count
= e1000_desc_unused(rx_ring
);
1064 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
1066 adapter
->total_rx_bytes
+= total_rx_bytes
;
1067 adapter
->total_rx_packets
+= total_rx_packets
;
1068 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
1069 netdev
->stats
.rx_packets
+= total_rx_packets
;
1074 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1075 * @adapter: board private structure
1077 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
)
1079 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1080 struct e1000_buffer
*buffer_info
;
1081 struct e1000_ps_page
*ps_page
;
1082 struct pci_dev
*pdev
= adapter
->pdev
;
1085 /* Free all the Rx ring sk_buffs */
1086 for (i
= 0; i
< rx_ring
->count
; i
++) {
1087 buffer_info
= &rx_ring
->buffer_info
[i
];
1088 if (buffer_info
->dma
) {
1089 if (adapter
->clean_rx
== e1000_clean_rx_irq
)
1090 pci_unmap_single(pdev
, buffer_info
->dma
,
1091 adapter
->rx_buffer_len
,
1092 PCI_DMA_FROMDEVICE
);
1093 else if (adapter
->clean_rx
== e1000_clean_jumbo_rx_irq
)
1094 pci_unmap_page(pdev
, buffer_info
->dma
,
1096 PCI_DMA_FROMDEVICE
);
1097 else if (adapter
->clean_rx
== e1000_clean_rx_irq_ps
)
1098 pci_unmap_single(pdev
, buffer_info
->dma
,
1099 adapter
->rx_ps_bsize0
,
1100 PCI_DMA_FROMDEVICE
);
1101 buffer_info
->dma
= 0;
1104 if (buffer_info
->page
) {
1105 put_page(buffer_info
->page
);
1106 buffer_info
->page
= NULL
;
1109 if (buffer_info
->skb
) {
1110 dev_kfree_skb(buffer_info
->skb
);
1111 buffer_info
->skb
= NULL
;
1114 for (j
= 0; j
< PS_PAGE_BUFFERS
; j
++) {
1115 ps_page
= &buffer_info
->ps_pages
[j
];
1118 pci_unmap_page(pdev
, ps_page
->dma
, PAGE_SIZE
,
1119 PCI_DMA_FROMDEVICE
);
1121 put_page(ps_page
->page
);
1122 ps_page
->page
= NULL
;
1126 /* there also may be some cached data from a chained receive */
1127 if (rx_ring
->rx_skb_top
) {
1128 dev_kfree_skb(rx_ring
->rx_skb_top
);
1129 rx_ring
->rx_skb_top
= NULL
;
1132 /* Zero out the descriptor ring */
1133 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1135 rx_ring
->next_to_clean
= 0;
1136 rx_ring
->next_to_use
= 0;
1137 adapter
->flags2
&= ~FLAG2_IS_DISCARDING
;
1139 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->head
);
1140 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
1143 static void e1000e_downshift_workaround(struct work_struct
*work
)
1145 struct e1000_adapter
*adapter
= container_of(work
,
1146 struct e1000_adapter
, downshift_task
);
1148 e1000e_gig_downshift_workaround_ich8lan(&adapter
->hw
);
1152 * e1000_intr_msi - Interrupt Handler
1153 * @irq: interrupt number
1154 * @data: pointer to a network interface device structure
1156 static irqreturn_t
e1000_intr_msi(int irq
, void *data
)
1158 struct net_device
*netdev
= data
;
1159 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1160 struct e1000_hw
*hw
= &adapter
->hw
;
1161 u32 icr
= er32(ICR
);
1164 * read ICR disables interrupts using IAM
1167 if (icr
& E1000_ICR_LSC
) {
1168 hw
->mac
.get_link_status
= 1;
1170 * ICH8 workaround-- Call gig speed drop workaround on cable
1171 * disconnect (LSC) before accessing any PHY registers
1173 if ((adapter
->flags
& FLAG_LSC_GIG_SPEED_DROP
) &&
1174 (!(er32(STATUS
) & E1000_STATUS_LU
)))
1175 schedule_work(&adapter
->downshift_task
);
1178 * 80003ES2LAN workaround-- For packet buffer work-around on
1179 * link down event; disable receives here in the ISR and reset
1180 * adapter in watchdog
1182 if (netif_carrier_ok(netdev
) &&
1183 adapter
->flags
& FLAG_RX_NEEDS_RESTART
) {
1184 /* disable receives */
1185 u32 rctl
= er32(RCTL
);
1186 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1187 adapter
->flags
|= FLAG_RX_RESTART_NOW
;
1189 /* guard against interrupt when we're going down */
1190 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1191 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1194 if (napi_schedule_prep(&adapter
->napi
)) {
1195 adapter
->total_tx_bytes
= 0;
1196 adapter
->total_tx_packets
= 0;
1197 adapter
->total_rx_bytes
= 0;
1198 adapter
->total_rx_packets
= 0;
1199 __napi_schedule(&adapter
->napi
);
1206 * e1000_intr - Interrupt Handler
1207 * @irq: interrupt number
1208 * @data: pointer to a network interface device structure
1210 static irqreturn_t
e1000_intr(int irq
, void *data
)
1212 struct net_device
*netdev
= data
;
1213 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1214 struct e1000_hw
*hw
= &adapter
->hw
;
1215 u32 rctl
, icr
= er32(ICR
);
1217 if (!icr
|| test_bit(__E1000_DOWN
, &adapter
->state
))
1218 return IRQ_NONE
; /* Not our interrupt */
1221 * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1222 * not set, then the adapter didn't send an interrupt
1224 if (!(icr
& E1000_ICR_INT_ASSERTED
))
1228 * Interrupt Auto-Mask...upon reading ICR,
1229 * interrupts are masked. No need for the
1233 if (icr
& E1000_ICR_LSC
) {
1234 hw
->mac
.get_link_status
= 1;
1236 * ICH8 workaround-- Call gig speed drop workaround on cable
1237 * disconnect (LSC) before accessing any PHY registers
1239 if ((adapter
->flags
& FLAG_LSC_GIG_SPEED_DROP
) &&
1240 (!(er32(STATUS
) & E1000_STATUS_LU
)))
1241 schedule_work(&adapter
->downshift_task
);
1244 * 80003ES2LAN workaround--
1245 * For packet buffer work-around on link down event;
1246 * disable receives here in the ISR and
1247 * reset adapter in watchdog
1249 if (netif_carrier_ok(netdev
) &&
1250 (adapter
->flags
& FLAG_RX_NEEDS_RESTART
)) {
1251 /* disable receives */
1253 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1254 adapter
->flags
|= FLAG_RX_RESTART_NOW
;
1256 /* guard against interrupt when we're going down */
1257 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1258 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1261 if (napi_schedule_prep(&adapter
->napi
)) {
1262 adapter
->total_tx_bytes
= 0;
1263 adapter
->total_tx_packets
= 0;
1264 adapter
->total_rx_bytes
= 0;
1265 adapter
->total_rx_packets
= 0;
1266 __napi_schedule(&adapter
->napi
);
1272 static irqreturn_t
e1000_msix_other(int irq
, void *data
)
1274 struct net_device
*netdev
= data
;
1275 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1276 struct e1000_hw
*hw
= &adapter
->hw
;
1277 u32 icr
= er32(ICR
);
1279 if (!(icr
& E1000_ICR_INT_ASSERTED
)) {
1280 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1281 ew32(IMS
, E1000_IMS_OTHER
);
1285 if (icr
& adapter
->eiac_mask
)
1286 ew32(ICS
, (icr
& adapter
->eiac_mask
));
1288 if (icr
& E1000_ICR_OTHER
) {
1289 if (!(icr
& E1000_ICR_LSC
))
1290 goto no_link_interrupt
;
1291 hw
->mac
.get_link_status
= 1;
1292 /* guard against interrupt when we're going down */
1293 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1294 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1298 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1299 ew32(IMS
, E1000_IMS_LSC
| E1000_IMS_OTHER
);
1305 static irqreturn_t
e1000_intr_msix_tx(int irq
, void *data
)
1307 struct net_device
*netdev
= data
;
1308 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1309 struct e1000_hw
*hw
= &adapter
->hw
;
1310 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1313 adapter
->total_tx_bytes
= 0;
1314 adapter
->total_tx_packets
= 0;
1316 if (!e1000_clean_tx_irq(adapter
))
1317 /* Ring was not completely cleaned, so fire another interrupt */
1318 ew32(ICS
, tx_ring
->ims_val
);
1323 static irqreturn_t
e1000_intr_msix_rx(int irq
, void *data
)
1325 struct net_device
*netdev
= data
;
1326 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1328 /* Write the ITR value calculated at the end of the
1329 * previous interrupt.
1331 if (adapter
->rx_ring
->set_itr
) {
1332 writel(1000000000 / (adapter
->rx_ring
->itr_val
* 256),
1333 adapter
->hw
.hw_addr
+ adapter
->rx_ring
->itr_register
);
1334 adapter
->rx_ring
->set_itr
= 0;
1337 if (napi_schedule_prep(&adapter
->napi
)) {
1338 adapter
->total_rx_bytes
= 0;
1339 adapter
->total_rx_packets
= 0;
1340 __napi_schedule(&adapter
->napi
);
1346 * e1000_configure_msix - Configure MSI-X hardware
1348 * e1000_configure_msix sets up the hardware to properly
1349 * generate MSI-X interrupts.
1351 static void e1000_configure_msix(struct e1000_adapter
*adapter
)
1353 struct e1000_hw
*hw
= &adapter
->hw
;
1354 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1355 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1357 u32 ctrl_ext
, ivar
= 0;
1359 adapter
->eiac_mask
= 0;
1361 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1362 if (hw
->mac
.type
== e1000_82574
) {
1363 u32 rfctl
= er32(RFCTL
);
1364 rfctl
|= E1000_RFCTL_ACK_DIS
;
1368 #define E1000_IVAR_INT_ALLOC_VALID 0x8
1369 /* Configure Rx vector */
1370 rx_ring
->ims_val
= E1000_IMS_RXQ0
;
1371 adapter
->eiac_mask
|= rx_ring
->ims_val
;
1372 if (rx_ring
->itr_val
)
1373 writel(1000000000 / (rx_ring
->itr_val
* 256),
1374 hw
->hw_addr
+ rx_ring
->itr_register
);
1376 writel(1, hw
->hw_addr
+ rx_ring
->itr_register
);
1377 ivar
= E1000_IVAR_INT_ALLOC_VALID
| vector
;
1379 /* Configure Tx vector */
1380 tx_ring
->ims_val
= E1000_IMS_TXQ0
;
1382 if (tx_ring
->itr_val
)
1383 writel(1000000000 / (tx_ring
->itr_val
* 256),
1384 hw
->hw_addr
+ tx_ring
->itr_register
);
1386 writel(1, hw
->hw_addr
+ tx_ring
->itr_register
);
1387 adapter
->eiac_mask
|= tx_ring
->ims_val
;
1388 ivar
|= ((E1000_IVAR_INT_ALLOC_VALID
| vector
) << 8);
1390 /* set vector for Other Causes, e.g. link changes */
1392 ivar
|= ((E1000_IVAR_INT_ALLOC_VALID
| vector
) << 16);
1393 if (rx_ring
->itr_val
)
1394 writel(1000000000 / (rx_ring
->itr_val
* 256),
1395 hw
->hw_addr
+ E1000_EITR_82574(vector
));
1397 writel(1, hw
->hw_addr
+ E1000_EITR_82574(vector
));
1399 /* Cause Tx interrupts on every write back */
1404 /* enable MSI-X PBA support */
1405 ctrl_ext
= er32(CTRL_EXT
);
1406 ctrl_ext
|= E1000_CTRL_EXT_PBA_CLR
;
1408 /* Auto-Mask Other interrupts upon ICR read */
1409 #define E1000_EIAC_MASK_82574 0x01F00000
1410 ew32(IAM
, ~E1000_EIAC_MASK_82574
| E1000_IMS_OTHER
);
1411 ctrl_ext
|= E1000_CTRL_EXT_EIAME
;
1412 ew32(CTRL_EXT
, ctrl_ext
);
1416 void e1000e_reset_interrupt_capability(struct e1000_adapter
*adapter
)
1418 if (adapter
->msix_entries
) {
1419 pci_disable_msix(adapter
->pdev
);
1420 kfree(adapter
->msix_entries
);
1421 adapter
->msix_entries
= NULL
;
1422 } else if (adapter
->flags
& FLAG_MSI_ENABLED
) {
1423 pci_disable_msi(adapter
->pdev
);
1424 adapter
->flags
&= ~FLAG_MSI_ENABLED
;
1431 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1433 * Attempt to configure interrupts using the best available
1434 * capabilities of the hardware and kernel.
1436 void e1000e_set_interrupt_capability(struct e1000_adapter
*adapter
)
1442 switch (adapter
->int_mode
) {
1443 case E1000E_INT_MODE_MSIX
:
1444 if (adapter
->flags
& FLAG_HAS_MSIX
) {
1445 numvecs
= 3; /* RxQ0, TxQ0 and other */
1446 adapter
->msix_entries
= kcalloc(numvecs
,
1447 sizeof(struct msix_entry
),
1449 if (adapter
->msix_entries
) {
1450 for (i
= 0; i
< numvecs
; i
++)
1451 adapter
->msix_entries
[i
].entry
= i
;
1453 err
= pci_enable_msix(adapter
->pdev
,
1454 adapter
->msix_entries
,
1459 /* MSI-X failed, so fall through and try MSI */
1460 e_err("Failed to initialize MSI-X interrupts. "
1461 "Falling back to MSI interrupts.\n");
1462 e1000e_reset_interrupt_capability(adapter
);
1464 adapter
->int_mode
= E1000E_INT_MODE_MSI
;
1466 case E1000E_INT_MODE_MSI
:
1467 if (!pci_enable_msi(adapter
->pdev
)) {
1468 adapter
->flags
|= FLAG_MSI_ENABLED
;
1470 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
1471 e_err("Failed to initialize MSI interrupts. Falling "
1472 "back to legacy interrupts.\n");
1475 case E1000E_INT_MODE_LEGACY
:
1476 /* Don't do anything; this is the system default */
1484 * e1000_request_msix - Initialize MSI-X interrupts
1486 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1489 static int e1000_request_msix(struct e1000_adapter
*adapter
)
1491 struct net_device
*netdev
= adapter
->netdev
;
1492 int err
= 0, vector
= 0;
1494 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5))
1495 sprintf(adapter
->rx_ring
->name
, "%s-rx-0", netdev
->name
);
1497 memcpy(adapter
->rx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1498 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1499 e1000_intr_msix_rx
, 0, adapter
->rx_ring
->name
,
1503 adapter
->rx_ring
->itr_register
= E1000_EITR_82574(vector
);
1504 adapter
->rx_ring
->itr_val
= adapter
->itr
;
1507 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5))
1508 sprintf(adapter
->tx_ring
->name
, "%s-tx-0", netdev
->name
);
1510 memcpy(adapter
->tx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1511 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1512 e1000_intr_msix_tx
, 0, adapter
->tx_ring
->name
,
1516 adapter
->tx_ring
->itr_register
= E1000_EITR_82574(vector
);
1517 adapter
->tx_ring
->itr_val
= adapter
->itr
;
1520 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1521 e1000_msix_other
, 0, netdev
->name
, netdev
);
1525 e1000_configure_msix(adapter
);
1532 * e1000_request_irq - initialize interrupts
1534 * Attempts to configure interrupts using the best available
1535 * capabilities of the hardware and kernel.
1537 static int e1000_request_irq(struct e1000_adapter
*adapter
)
1539 struct net_device
*netdev
= adapter
->netdev
;
1542 if (adapter
->msix_entries
) {
1543 err
= e1000_request_msix(adapter
);
1546 /* fall back to MSI */
1547 e1000e_reset_interrupt_capability(adapter
);
1548 adapter
->int_mode
= E1000E_INT_MODE_MSI
;
1549 e1000e_set_interrupt_capability(adapter
);
1551 if (adapter
->flags
& FLAG_MSI_ENABLED
) {
1552 err
= request_irq(adapter
->pdev
->irq
, e1000_intr_msi
, 0,
1553 netdev
->name
, netdev
);
1557 /* fall back to legacy interrupt */
1558 e1000e_reset_interrupt_capability(adapter
);
1559 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
1562 err
= request_irq(adapter
->pdev
->irq
, e1000_intr
, IRQF_SHARED
,
1563 netdev
->name
, netdev
);
1565 e_err("Unable to allocate interrupt, Error: %d\n", err
);
1570 static void e1000_free_irq(struct e1000_adapter
*adapter
)
1572 struct net_device
*netdev
= adapter
->netdev
;
1574 if (adapter
->msix_entries
) {
1577 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1580 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1583 /* Other Causes interrupt vector */
1584 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1588 free_irq(adapter
->pdev
->irq
, netdev
);
1592 * e1000_irq_disable - Mask off interrupt generation on the NIC
1594 static void e1000_irq_disable(struct e1000_adapter
*adapter
)
1596 struct e1000_hw
*hw
= &adapter
->hw
;
1599 if (adapter
->msix_entries
)
1600 ew32(EIAC_82574
, 0);
1602 synchronize_irq(adapter
->pdev
->irq
);
1606 * e1000_irq_enable - Enable default interrupt generation settings
1608 static void e1000_irq_enable(struct e1000_adapter
*adapter
)
1610 struct e1000_hw
*hw
= &adapter
->hw
;
1612 if (adapter
->msix_entries
) {
1613 ew32(EIAC_82574
, adapter
->eiac_mask
& E1000_EIAC_MASK_82574
);
1614 ew32(IMS
, adapter
->eiac_mask
| E1000_IMS_OTHER
| E1000_IMS_LSC
);
1616 ew32(IMS
, IMS_ENABLE_MASK
);
1622 * e1000_get_hw_control - get control of the h/w from f/w
1623 * @adapter: address of board private structure
1625 * e1000_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1626 * For ASF and Pass Through versions of f/w this means that
1627 * the driver is loaded. For AMT version (only with 82573)
1628 * of the f/w this means that the network i/f is open.
1630 static void e1000_get_hw_control(struct e1000_adapter
*adapter
)
1632 struct e1000_hw
*hw
= &adapter
->hw
;
1636 /* Let firmware know the driver has taken over */
1637 if (adapter
->flags
& FLAG_HAS_SWSM_ON_LOAD
) {
1639 ew32(SWSM
, swsm
| E1000_SWSM_DRV_LOAD
);
1640 } else if (adapter
->flags
& FLAG_HAS_CTRLEXT_ON_LOAD
) {
1641 ctrl_ext
= er32(CTRL_EXT
);
1642 ew32(CTRL_EXT
, ctrl_ext
| E1000_CTRL_EXT_DRV_LOAD
);
1647 * e1000_release_hw_control - release control of the h/w to f/w
1648 * @adapter: address of board private structure
1650 * e1000_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1651 * For ASF and Pass Through versions of f/w this means that the
1652 * driver is no longer loaded. For AMT version (only with 82573) i
1653 * of the f/w this means that the network i/f is closed.
1656 static void e1000_release_hw_control(struct e1000_adapter
*adapter
)
1658 struct e1000_hw
*hw
= &adapter
->hw
;
1662 /* Let firmware taken over control of h/w */
1663 if (adapter
->flags
& FLAG_HAS_SWSM_ON_LOAD
) {
1665 ew32(SWSM
, swsm
& ~E1000_SWSM_DRV_LOAD
);
1666 } else if (adapter
->flags
& FLAG_HAS_CTRLEXT_ON_LOAD
) {
1667 ctrl_ext
= er32(CTRL_EXT
);
1668 ew32(CTRL_EXT
, ctrl_ext
& ~E1000_CTRL_EXT_DRV_LOAD
);
1673 * @e1000_alloc_ring - allocate memory for a ring structure
1675 static int e1000_alloc_ring_dma(struct e1000_adapter
*adapter
,
1676 struct e1000_ring
*ring
)
1678 struct pci_dev
*pdev
= adapter
->pdev
;
1680 ring
->desc
= dma_alloc_coherent(&pdev
->dev
, ring
->size
, &ring
->dma
,
1689 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
1690 * @adapter: board private structure
1692 * Return 0 on success, negative on failure
1694 int e1000e_setup_tx_resources(struct e1000_adapter
*adapter
)
1696 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1697 int err
= -ENOMEM
, size
;
1699 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
1700 tx_ring
->buffer_info
= vmalloc(size
);
1701 if (!tx_ring
->buffer_info
)
1703 memset(tx_ring
->buffer_info
, 0, size
);
1705 /* round up to nearest 4K */
1706 tx_ring
->size
= tx_ring
->count
* sizeof(struct e1000_tx_desc
);
1707 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
1709 err
= e1000_alloc_ring_dma(adapter
, tx_ring
);
1713 tx_ring
->next_to_use
= 0;
1714 tx_ring
->next_to_clean
= 0;
1718 vfree(tx_ring
->buffer_info
);
1719 e_err("Unable to allocate memory for the transmit descriptor ring\n");
1724 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
1725 * @adapter: board private structure
1727 * Returns 0 on success, negative on failure
1729 int e1000e_setup_rx_resources(struct e1000_adapter
*adapter
)
1731 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1732 struct e1000_buffer
*buffer_info
;
1733 int i
, size
, desc_len
, err
= -ENOMEM
;
1735 size
= sizeof(struct e1000_buffer
) * rx_ring
->count
;
1736 rx_ring
->buffer_info
= vmalloc(size
);
1737 if (!rx_ring
->buffer_info
)
1739 memset(rx_ring
->buffer_info
, 0, size
);
1741 for (i
= 0; i
< rx_ring
->count
; i
++) {
1742 buffer_info
= &rx_ring
->buffer_info
[i
];
1743 buffer_info
->ps_pages
= kcalloc(PS_PAGE_BUFFERS
,
1744 sizeof(struct e1000_ps_page
),
1746 if (!buffer_info
->ps_pages
)
1750 desc_len
= sizeof(union e1000_rx_desc_packet_split
);
1752 /* Round up to nearest 4K */
1753 rx_ring
->size
= rx_ring
->count
* desc_len
;
1754 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
1756 err
= e1000_alloc_ring_dma(adapter
, rx_ring
);
1760 rx_ring
->next_to_clean
= 0;
1761 rx_ring
->next_to_use
= 0;
1762 rx_ring
->rx_skb_top
= NULL
;
1767 for (i
= 0; i
< rx_ring
->count
; i
++) {
1768 buffer_info
= &rx_ring
->buffer_info
[i
];
1769 kfree(buffer_info
->ps_pages
);
1772 vfree(rx_ring
->buffer_info
);
1773 e_err("Unable to allocate memory for the transmit descriptor ring\n");
1778 * e1000_clean_tx_ring - Free Tx Buffers
1779 * @adapter: board private structure
1781 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
)
1783 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1784 struct e1000_buffer
*buffer_info
;
1788 for (i
= 0; i
< tx_ring
->count
; i
++) {
1789 buffer_info
= &tx_ring
->buffer_info
[i
];
1790 e1000_put_txbuf(adapter
, buffer_info
);
1793 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
1794 memset(tx_ring
->buffer_info
, 0, size
);
1796 memset(tx_ring
->desc
, 0, tx_ring
->size
);
1798 tx_ring
->next_to_use
= 0;
1799 tx_ring
->next_to_clean
= 0;
1801 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->head
);
1802 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
1806 * e1000e_free_tx_resources - Free Tx Resources per Queue
1807 * @adapter: board private structure
1809 * Free all transmit software resources
1811 void e1000e_free_tx_resources(struct e1000_adapter
*adapter
)
1813 struct pci_dev
*pdev
= adapter
->pdev
;
1814 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1816 e1000_clean_tx_ring(adapter
);
1818 vfree(tx_ring
->buffer_info
);
1819 tx_ring
->buffer_info
= NULL
;
1821 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
1823 tx_ring
->desc
= NULL
;
1827 * e1000e_free_rx_resources - Free Rx Resources
1828 * @adapter: board private structure
1830 * Free all receive software resources
1833 void e1000e_free_rx_resources(struct e1000_adapter
*adapter
)
1835 struct pci_dev
*pdev
= adapter
->pdev
;
1836 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1839 e1000_clean_rx_ring(adapter
);
1841 for (i
= 0; i
< rx_ring
->count
; i
++) {
1842 kfree(rx_ring
->buffer_info
[i
].ps_pages
);
1845 vfree(rx_ring
->buffer_info
);
1846 rx_ring
->buffer_info
= NULL
;
1848 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
1850 rx_ring
->desc
= NULL
;
1854 * e1000_update_itr - update the dynamic ITR value based on statistics
1855 * @adapter: pointer to adapter
1856 * @itr_setting: current adapter->itr
1857 * @packets: the number of packets during this measurement interval
1858 * @bytes: the number of bytes during this measurement interval
1860 * Stores a new ITR value based on packets and byte
1861 * counts during the last interrupt. The advantage of per interrupt
1862 * computation is faster updates and more accurate ITR for the current
1863 * traffic pattern. Constants in this function were computed
1864 * based on theoretical maximum wire speed and thresholds were set based
1865 * on testing data as well as attempting to minimize response time
1866 * while increasing bulk throughput. This functionality is controlled
1867 * by the InterruptThrottleRate module parameter.
1869 static unsigned int e1000_update_itr(struct e1000_adapter
*adapter
,
1870 u16 itr_setting
, int packets
,
1873 unsigned int retval
= itr_setting
;
1876 goto update_itr_done
;
1878 switch (itr_setting
) {
1879 case lowest_latency
:
1880 /* handle TSO and jumbo frames */
1881 if (bytes
/packets
> 8000)
1882 retval
= bulk_latency
;
1883 else if ((packets
< 5) && (bytes
> 512)) {
1884 retval
= low_latency
;
1887 case low_latency
: /* 50 usec aka 20000 ints/s */
1888 if (bytes
> 10000) {
1889 /* this if handles the TSO accounting */
1890 if (bytes
/packets
> 8000) {
1891 retval
= bulk_latency
;
1892 } else if ((packets
< 10) || ((bytes
/packets
) > 1200)) {
1893 retval
= bulk_latency
;
1894 } else if ((packets
> 35)) {
1895 retval
= lowest_latency
;
1897 } else if (bytes
/packets
> 2000) {
1898 retval
= bulk_latency
;
1899 } else if (packets
<= 2 && bytes
< 512) {
1900 retval
= lowest_latency
;
1903 case bulk_latency
: /* 250 usec aka 4000 ints/s */
1904 if (bytes
> 25000) {
1906 retval
= low_latency
;
1908 } else if (bytes
< 6000) {
1909 retval
= low_latency
;
1918 static void e1000_set_itr(struct e1000_adapter
*adapter
)
1920 struct e1000_hw
*hw
= &adapter
->hw
;
1922 u32 new_itr
= adapter
->itr
;
1924 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
1925 if (adapter
->link_speed
!= SPEED_1000
) {
1931 adapter
->tx_itr
= e1000_update_itr(adapter
,
1933 adapter
->total_tx_packets
,
1934 adapter
->total_tx_bytes
);
1935 /* conservative mode (itr 3) eliminates the lowest_latency setting */
1936 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
1937 adapter
->tx_itr
= low_latency
;
1939 adapter
->rx_itr
= e1000_update_itr(adapter
,
1941 adapter
->total_rx_packets
,
1942 adapter
->total_rx_bytes
);
1943 /* conservative mode (itr 3) eliminates the lowest_latency setting */
1944 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
1945 adapter
->rx_itr
= low_latency
;
1947 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
1949 switch (current_itr
) {
1950 /* counts and packets in update_itr are dependent on these numbers */
1951 case lowest_latency
:
1955 new_itr
= 20000; /* aka hwitr = ~200 */
1965 if (new_itr
!= adapter
->itr
) {
1967 * this attempts to bias the interrupt rate towards Bulk
1968 * by adding intermediate steps when interrupt rate is
1971 new_itr
= new_itr
> adapter
->itr
?
1972 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
1974 adapter
->itr
= new_itr
;
1975 adapter
->rx_ring
->itr_val
= new_itr
;
1976 if (adapter
->msix_entries
)
1977 adapter
->rx_ring
->set_itr
= 1;
1979 ew32(ITR
, 1000000000 / (new_itr
* 256));
1984 * e1000_alloc_queues - Allocate memory for all rings
1985 * @adapter: board private structure to initialize
1987 static int __devinit
e1000_alloc_queues(struct e1000_adapter
*adapter
)
1989 adapter
->tx_ring
= kzalloc(sizeof(struct e1000_ring
), GFP_KERNEL
);
1990 if (!adapter
->tx_ring
)
1993 adapter
->rx_ring
= kzalloc(sizeof(struct e1000_ring
), GFP_KERNEL
);
1994 if (!adapter
->rx_ring
)
1999 e_err("Unable to allocate memory for queues\n");
2000 kfree(adapter
->rx_ring
);
2001 kfree(adapter
->tx_ring
);
2006 * e1000_clean - NAPI Rx polling callback
2007 * @napi: struct associated with this polling callback
2008 * @budget: amount of packets driver is allowed to process this poll
2010 static int e1000_clean(struct napi_struct
*napi
, int budget
)
2012 struct e1000_adapter
*adapter
= container_of(napi
, struct e1000_adapter
, napi
);
2013 struct e1000_hw
*hw
= &adapter
->hw
;
2014 struct net_device
*poll_dev
= adapter
->netdev
;
2015 int tx_cleaned
= 1, work_done
= 0;
2017 adapter
= netdev_priv(poll_dev
);
2019 if (adapter
->msix_entries
&&
2020 !(adapter
->rx_ring
->ims_val
& adapter
->tx_ring
->ims_val
))
2023 tx_cleaned
= e1000_clean_tx_irq(adapter
);
2026 adapter
->clean_rx(adapter
, &work_done
, budget
);
2031 /* If budget not fully consumed, exit the polling mode */
2032 if (work_done
< budget
) {
2033 if (adapter
->itr_setting
& 3)
2034 e1000_set_itr(adapter
);
2035 napi_complete(napi
);
2036 if (!test_bit(__E1000_DOWN
, &adapter
->state
)) {
2037 if (adapter
->msix_entries
)
2038 ew32(IMS
, adapter
->rx_ring
->ims_val
);
2040 e1000_irq_enable(adapter
);
2047 static void e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
2049 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2050 struct e1000_hw
*hw
= &adapter
->hw
;
2053 /* don't update vlan cookie if already programmed */
2054 if ((adapter
->hw
.mng_cookie
.status
&
2055 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
2056 (vid
== adapter
->mng_vlan_id
))
2059 /* add VID to filter table */
2060 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2061 index
= (vid
>> 5) & 0x7F;
2062 vfta
= E1000_READ_REG_ARRAY(hw
, E1000_VFTA
, index
);
2063 vfta
|= (1 << (vid
& 0x1F));
2064 hw
->mac
.ops
.write_vfta(hw
, index
, vfta
);
2068 static void e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
2070 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2071 struct e1000_hw
*hw
= &adapter
->hw
;
2074 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2075 e1000_irq_disable(adapter
);
2076 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
2078 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2079 e1000_irq_enable(adapter
);
2081 if ((adapter
->hw
.mng_cookie
.status
&
2082 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
2083 (vid
== adapter
->mng_vlan_id
)) {
2084 /* release control to f/w */
2085 e1000_release_hw_control(adapter
);
2089 /* remove VID from filter table */
2090 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2091 index
= (vid
>> 5) & 0x7F;
2092 vfta
= E1000_READ_REG_ARRAY(hw
, E1000_VFTA
, index
);
2093 vfta
&= ~(1 << (vid
& 0x1F));
2094 hw
->mac
.ops
.write_vfta(hw
, index
, vfta
);
2098 static void e1000_update_mng_vlan(struct e1000_adapter
*adapter
)
2100 struct net_device
*netdev
= adapter
->netdev
;
2101 u16 vid
= adapter
->hw
.mng_cookie
.vlan_id
;
2102 u16 old_vid
= adapter
->mng_vlan_id
;
2104 if (!adapter
->vlgrp
)
2107 if (!vlan_group_get_device(adapter
->vlgrp
, vid
)) {
2108 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
2109 if (adapter
->hw
.mng_cookie
.status
&
2110 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) {
2111 e1000_vlan_rx_add_vid(netdev
, vid
);
2112 adapter
->mng_vlan_id
= vid
;
2115 if ((old_vid
!= (u16
)E1000_MNG_VLAN_NONE
) &&
2117 !vlan_group_get_device(adapter
->vlgrp
, old_vid
))
2118 e1000_vlan_rx_kill_vid(netdev
, old_vid
);
2120 adapter
->mng_vlan_id
= vid
;
2125 static void e1000_vlan_rx_register(struct net_device
*netdev
,
2126 struct vlan_group
*grp
)
2128 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2129 struct e1000_hw
*hw
= &adapter
->hw
;
2132 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2133 e1000_irq_disable(adapter
);
2134 adapter
->vlgrp
= grp
;
2137 /* enable VLAN tag insert/strip */
2139 ctrl
|= E1000_CTRL_VME
;
2142 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2143 /* enable VLAN receive filtering */
2145 rctl
&= ~E1000_RCTL_CFIEN
;
2147 e1000_update_mng_vlan(adapter
);
2150 /* disable VLAN tag insert/strip */
2152 ctrl
&= ~E1000_CTRL_VME
;
2155 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2156 if (adapter
->mng_vlan_id
!=
2157 (u16
)E1000_MNG_VLAN_NONE
) {
2158 e1000_vlan_rx_kill_vid(netdev
,
2159 adapter
->mng_vlan_id
);
2160 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
2165 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2166 e1000_irq_enable(adapter
);
2169 static void e1000_restore_vlan(struct e1000_adapter
*adapter
)
2173 e1000_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2175 if (!adapter
->vlgrp
)
2178 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2179 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
2181 e1000_vlan_rx_add_vid(adapter
->netdev
, vid
);
2185 static void e1000_init_manageability(struct e1000_adapter
*adapter
)
2187 struct e1000_hw
*hw
= &adapter
->hw
;
2190 if (!(adapter
->flags
& FLAG_MNG_PT_ENABLED
))
2196 * enable receiving management packets to the host. this will probably
2197 * generate destination unreachable messages from the host OS, but
2198 * the packets will be handled on SMBUS
2200 manc
|= E1000_MANC_EN_MNG2HOST
;
2201 manc2h
= er32(MANC2H
);
2202 #define E1000_MNG2HOST_PORT_623 (1 << 5)
2203 #define E1000_MNG2HOST_PORT_664 (1 << 6)
2204 manc2h
|= E1000_MNG2HOST_PORT_623
;
2205 manc2h
|= E1000_MNG2HOST_PORT_664
;
2206 ew32(MANC2H
, manc2h
);
2211 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
2212 * @adapter: board private structure
2214 * Configure the Tx unit of the MAC after a reset.
2216 static void e1000_configure_tx(struct e1000_adapter
*adapter
)
2218 struct e1000_hw
*hw
= &adapter
->hw
;
2219 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
2221 u32 tdlen
, tctl
, tipg
, tarc
;
2224 /* Setup the HW Tx Head and Tail descriptor pointers */
2225 tdba
= tx_ring
->dma
;
2226 tdlen
= tx_ring
->count
* sizeof(struct e1000_tx_desc
);
2227 ew32(TDBAL
, (tdba
& DMA_BIT_MASK(32)));
2228 ew32(TDBAH
, (tdba
>> 32));
2232 tx_ring
->head
= E1000_TDH
;
2233 tx_ring
->tail
= E1000_TDT
;
2235 /* Set the default values for the Tx Inter Packet Gap timer */
2236 tipg
= DEFAULT_82543_TIPG_IPGT_COPPER
; /* 8 */
2237 ipgr1
= DEFAULT_82543_TIPG_IPGR1
; /* 8 */
2238 ipgr2
= DEFAULT_82543_TIPG_IPGR2
; /* 6 */
2240 if (adapter
->flags
& FLAG_TIPG_MEDIUM_FOR_80003ESLAN
)
2241 ipgr2
= DEFAULT_80003ES2LAN_TIPG_IPGR2
; /* 7 */
2243 tipg
|= ipgr1
<< E1000_TIPG_IPGR1_SHIFT
;
2244 tipg
|= ipgr2
<< E1000_TIPG_IPGR2_SHIFT
;
2247 /* Set the Tx Interrupt Delay register */
2248 ew32(TIDV
, adapter
->tx_int_delay
);
2249 /* Tx irq moderation */
2250 ew32(TADV
, adapter
->tx_abs_int_delay
);
2252 /* Program the Transmit Control Register */
2254 tctl
&= ~E1000_TCTL_CT
;
2255 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
2256 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
2258 if (adapter
->flags
& FLAG_TARC_SPEED_MODE_BIT
) {
2259 tarc
= er32(TARC(0));
2261 * set the speed mode bit, we'll clear it if we're not at
2262 * gigabit link later
2264 #define SPEED_MODE_BIT (1 << 21)
2265 tarc
|= SPEED_MODE_BIT
;
2266 ew32(TARC(0), tarc
);
2269 /* errata: program both queues to unweighted RR */
2270 if (adapter
->flags
& FLAG_TARC_SET_BIT_ZERO
) {
2271 tarc
= er32(TARC(0));
2273 ew32(TARC(0), tarc
);
2274 tarc
= er32(TARC(1));
2276 ew32(TARC(1), tarc
);
2279 /* Setup Transmit Descriptor Settings for eop descriptor */
2280 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_IFCS
;
2282 /* only set IDE if we are delaying interrupts using the timers */
2283 if (adapter
->tx_int_delay
)
2284 adapter
->txd_cmd
|= E1000_TXD_CMD_IDE
;
2286 /* enable Report Status bit */
2287 adapter
->txd_cmd
|= E1000_TXD_CMD_RS
;
2291 e1000e_config_collision_dist(hw
);
2295 * e1000_setup_rctl - configure the receive control registers
2296 * @adapter: Board private structure
2298 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2299 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2300 static void e1000_setup_rctl(struct e1000_adapter
*adapter
)
2302 struct e1000_hw
*hw
= &adapter
->hw
;
2307 /* Program MC offset vector base */
2309 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
2310 rctl
|= E1000_RCTL_EN
| E1000_RCTL_BAM
|
2311 E1000_RCTL_LBM_NO
| E1000_RCTL_RDMTS_HALF
|
2312 (adapter
->hw
.mac
.mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
2314 /* Do not Store bad packets */
2315 rctl
&= ~E1000_RCTL_SBP
;
2317 /* Enable Long Packet receive */
2318 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
2319 rctl
&= ~E1000_RCTL_LPE
;
2321 rctl
|= E1000_RCTL_LPE
;
2323 /* Some systems expect that the CRC is included in SMBUS traffic. The
2324 * hardware strips the CRC before sending to both SMBUS (BMC) and to
2325 * host memory when this is enabled
2327 if (adapter
->flags2
& FLAG2_CRC_STRIPPING
)
2328 rctl
|= E1000_RCTL_SECRC
;
2330 /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2331 if ((hw
->phy
.type
== e1000_phy_82577
) && (rctl
& E1000_RCTL_LPE
)) {
2334 e1e_rphy(hw
, PHY_REG(770, 26), &phy_data
);
2336 phy_data
|= (1 << 2);
2337 e1e_wphy(hw
, PHY_REG(770, 26), phy_data
);
2339 e1e_rphy(hw
, 22, &phy_data
);
2341 phy_data
|= (1 << 14);
2342 e1e_wphy(hw
, 0x10, 0x2823);
2343 e1e_wphy(hw
, 0x11, 0x0003);
2344 e1e_wphy(hw
, 22, phy_data
);
2347 /* Setup buffer sizes */
2348 rctl
&= ~E1000_RCTL_SZ_4096
;
2349 rctl
|= E1000_RCTL_BSEX
;
2350 switch (adapter
->rx_buffer_len
) {
2353 rctl
|= E1000_RCTL_SZ_2048
;
2354 rctl
&= ~E1000_RCTL_BSEX
;
2357 rctl
|= E1000_RCTL_SZ_4096
;
2360 rctl
|= E1000_RCTL_SZ_8192
;
2363 rctl
|= E1000_RCTL_SZ_16384
;
2368 * 82571 and greater support packet-split where the protocol
2369 * header is placed in skb->data and the packet data is
2370 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2371 * In the case of a non-split, skb->data is linearly filled,
2372 * followed by the page buffers. Therefore, skb->data is
2373 * sized to hold the largest protocol header.
2375 * allocations using alloc_page take too long for regular MTU
2376 * so only enable packet split for jumbo frames
2378 * Using pages when the page size is greater than 16k wastes
2379 * a lot of memory, since we allocate 3 pages at all times
2382 pages
= PAGE_USE_COUNT(adapter
->netdev
->mtu
);
2383 if (!(adapter
->flags
& FLAG_IS_ICH
) && (pages
<= 3) &&
2384 (PAGE_SIZE
<= 16384) && (rctl
& E1000_RCTL_LPE
))
2385 adapter
->rx_ps_pages
= pages
;
2387 adapter
->rx_ps_pages
= 0;
2389 if (adapter
->rx_ps_pages
) {
2390 /* Configure extra packet-split registers */
2391 rfctl
= er32(RFCTL
);
2392 rfctl
|= E1000_RFCTL_EXTEN
;
2394 * disable packet split support for IPv6 extension headers,
2395 * because some malformed IPv6 headers can hang the Rx
2397 rfctl
|= (E1000_RFCTL_IPV6_EX_DIS
|
2398 E1000_RFCTL_NEW_IPV6_EXT_DIS
);
2402 /* Enable Packet split descriptors */
2403 rctl
|= E1000_RCTL_DTYP_PS
;
2405 psrctl
|= adapter
->rx_ps_bsize0
>>
2406 E1000_PSRCTL_BSIZE0_SHIFT
;
2408 switch (adapter
->rx_ps_pages
) {
2410 psrctl
|= PAGE_SIZE
<<
2411 E1000_PSRCTL_BSIZE3_SHIFT
;
2413 psrctl
|= PAGE_SIZE
<<
2414 E1000_PSRCTL_BSIZE2_SHIFT
;
2416 psrctl
|= PAGE_SIZE
>>
2417 E1000_PSRCTL_BSIZE1_SHIFT
;
2421 ew32(PSRCTL
, psrctl
);
2425 /* just started the receive unit, no need to restart */
2426 adapter
->flags
&= ~FLAG_RX_RESTART_NOW
;
2430 * e1000_configure_rx - Configure Receive Unit after Reset
2431 * @adapter: board private structure
2433 * Configure the Rx unit of the MAC after a reset.
2435 static void e1000_configure_rx(struct e1000_adapter
*adapter
)
2437 struct e1000_hw
*hw
= &adapter
->hw
;
2438 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
2440 u32 rdlen
, rctl
, rxcsum
, ctrl_ext
;
2442 if (adapter
->rx_ps_pages
) {
2443 /* this is a 32 byte descriptor */
2444 rdlen
= rx_ring
->count
*
2445 sizeof(union e1000_rx_desc_packet_split
);
2446 adapter
->clean_rx
= e1000_clean_rx_irq_ps
;
2447 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers_ps
;
2448 } else if (adapter
->netdev
->mtu
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
2449 rdlen
= rx_ring
->count
* sizeof(struct e1000_rx_desc
);
2450 adapter
->clean_rx
= e1000_clean_jumbo_rx_irq
;
2451 adapter
->alloc_rx_buf
= e1000_alloc_jumbo_rx_buffers
;
2453 rdlen
= rx_ring
->count
* sizeof(struct e1000_rx_desc
);
2454 adapter
->clean_rx
= e1000_clean_rx_irq
;
2455 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers
;
2458 /* disable receives while setting up the descriptors */
2460 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
2464 /* set the Receive Delay Timer Register */
2465 ew32(RDTR
, adapter
->rx_int_delay
);
2467 /* irq moderation */
2468 ew32(RADV
, adapter
->rx_abs_int_delay
);
2469 if (adapter
->itr_setting
!= 0)
2470 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
2472 ctrl_ext
= er32(CTRL_EXT
);
2473 /* Auto-Mask interrupts upon ICR access */
2474 ctrl_ext
|= E1000_CTRL_EXT_IAME
;
2475 ew32(IAM
, 0xffffffff);
2476 ew32(CTRL_EXT
, ctrl_ext
);
2480 * Setup the HW Rx Head and Tail Descriptor Pointers and
2481 * the Base and Length of the Rx Descriptor Ring
2483 rdba
= rx_ring
->dma
;
2484 ew32(RDBAL
, (rdba
& DMA_BIT_MASK(32)));
2485 ew32(RDBAH
, (rdba
>> 32));
2489 rx_ring
->head
= E1000_RDH
;
2490 rx_ring
->tail
= E1000_RDT
;
2492 /* Enable Receive Checksum Offload for TCP and UDP */
2493 rxcsum
= er32(RXCSUM
);
2494 if (adapter
->flags
& FLAG_RX_CSUM_ENABLED
) {
2495 rxcsum
|= E1000_RXCSUM_TUOFL
;
2498 * IPv4 payload checksum for UDP fragments must be
2499 * used in conjunction with packet-split.
2501 if (adapter
->rx_ps_pages
)
2502 rxcsum
|= E1000_RXCSUM_IPPCSE
;
2504 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
2505 /* no need to clear IPPCSE as it defaults to 0 */
2507 ew32(RXCSUM
, rxcsum
);
2510 * Enable early receives on supported devices, only takes effect when
2511 * packet size is equal or larger than the specified value (in 8 byte
2512 * units), e.g. using jumbo frames when setting to E1000_ERT_2048
2514 if (adapter
->flags
& FLAG_HAS_ERT
) {
2515 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
2516 u32 rxdctl
= er32(RXDCTL(0));
2517 ew32(RXDCTL(0), rxdctl
| 0x3);
2518 ew32(ERT
, E1000_ERT_2048
| (1 << 13));
2520 * With jumbo frames and early-receive enabled,
2521 * excessive C-state transition latencies result in
2522 * dropped transactions.
2524 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY
,
2525 adapter
->netdev
->name
, 55);
2527 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY
,
2528 adapter
->netdev
->name
,
2529 PM_QOS_DEFAULT_VALUE
);
2533 /* Enable Receives */
2538 * e1000_update_mc_addr_list - Update Multicast addresses
2539 * @hw: pointer to the HW structure
2540 * @mc_addr_list: array of multicast addresses to program
2541 * @mc_addr_count: number of multicast addresses to program
2543 * Updates the Multicast Table Array.
2544 * The caller must have a packed mc_addr_list of multicast addresses.
2546 static void e1000_update_mc_addr_list(struct e1000_hw
*hw
, u8
*mc_addr_list
,
2549 hw
->mac
.ops
.update_mc_addr_list(hw
, mc_addr_list
, mc_addr_count
);
2553 * e1000_set_multi - Multicast and Promiscuous mode set
2554 * @netdev: network interface device structure
2556 * The set_multi entry point is called whenever the multicast address
2557 * list or the network interface flags are updated. This routine is
2558 * responsible for configuring the hardware for proper multicast,
2559 * promiscuous mode, and all-multi behavior.
2561 static void e1000_set_multi(struct net_device
*netdev
)
2563 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2564 struct e1000_hw
*hw
= &adapter
->hw
;
2565 struct dev_mc_list
*mc_ptr
;
2570 /* Check for Promiscuous and All Multicast modes */
2574 if (netdev
->flags
& IFF_PROMISC
) {
2575 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2576 rctl
&= ~E1000_RCTL_VFE
;
2578 if (netdev
->flags
& IFF_ALLMULTI
) {
2579 rctl
|= E1000_RCTL_MPE
;
2580 rctl
&= ~E1000_RCTL_UPE
;
2582 rctl
&= ~(E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2584 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
)
2585 rctl
|= E1000_RCTL_VFE
;
2590 if (!netdev_mc_empty(netdev
)) {
2591 mta_list
= kmalloc(netdev_mc_count(netdev
) * 6, GFP_ATOMIC
);
2595 /* prepare a packed array of only addresses. */
2597 netdev_for_each_mc_addr(mc_ptr
, netdev
)
2598 memcpy(mta_list
+ (i
++ * ETH_ALEN
),
2599 mc_ptr
->dmi_addr
, ETH_ALEN
);
2601 e1000_update_mc_addr_list(hw
, mta_list
, i
);
2605 * if we're called from probe, we might not have
2606 * anything to do here, so clear out the list
2608 e1000_update_mc_addr_list(hw
, NULL
, 0);
2613 * e1000_configure - configure the hardware for Rx and Tx
2614 * @adapter: private board structure
2616 static void e1000_configure(struct e1000_adapter
*adapter
)
2618 e1000_set_multi(adapter
->netdev
);
2620 e1000_restore_vlan(adapter
);
2621 e1000_init_manageability(adapter
);
2623 e1000_configure_tx(adapter
);
2624 e1000_setup_rctl(adapter
);
2625 e1000_configure_rx(adapter
);
2626 adapter
->alloc_rx_buf(adapter
, e1000_desc_unused(adapter
->rx_ring
));
2630 * e1000e_power_up_phy - restore link in case the phy was powered down
2631 * @adapter: address of board private structure
2633 * The phy may be powered down to save power and turn off link when the
2634 * driver is unloaded and wake on lan is not enabled (among others)
2635 * *** this routine MUST be followed by a call to e1000e_reset ***
2637 void e1000e_power_up_phy(struct e1000_adapter
*adapter
)
2639 if (adapter
->hw
.phy
.ops
.power_up
)
2640 adapter
->hw
.phy
.ops
.power_up(&adapter
->hw
);
2642 adapter
->hw
.mac
.ops
.setup_link(&adapter
->hw
);
2646 * e1000_power_down_phy - Power down the PHY
2648 * Power down the PHY so no link is implied when interface is down.
2649 * The PHY cannot be powered down if management or WoL is active.
2651 static void e1000_power_down_phy(struct e1000_adapter
*adapter
)
2653 /* WoL is enabled */
2657 if (adapter
->hw
.phy
.ops
.power_down
)
2658 adapter
->hw
.phy
.ops
.power_down(&adapter
->hw
);
2662 * e1000e_reset - bring the hardware into a known good state
2664 * This function boots the hardware and enables some settings that
2665 * require a configuration cycle of the hardware - those cannot be
2666 * set/changed during runtime. After reset the device needs to be
2667 * properly configured for Rx, Tx etc.
2669 void e1000e_reset(struct e1000_adapter
*adapter
)
2671 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
2672 struct e1000_fc_info
*fc
= &adapter
->hw
.fc
;
2673 struct e1000_hw
*hw
= &adapter
->hw
;
2674 u32 tx_space
, min_tx_space
, min_rx_space
;
2675 u32 pba
= adapter
->pba
;
2678 /* reset Packet Buffer Allocation to default */
2681 if (adapter
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
2683 * To maintain wire speed transmits, the Tx FIFO should be
2684 * large enough to accommodate two full transmit packets,
2685 * rounded up to the next 1KB and expressed in KB. Likewise,
2686 * the Rx FIFO should be large enough to accommodate at least
2687 * one full receive packet and is similarly rounded up and
2691 /* upper 16 bits has Tx packet buffer allocation size in KB */
2692 tx_space
= pba
>> 16;
2693 /* lower 16 bits has Rx packet buffer allocation size in KB */
2696 * the Tx fifo also stores 16 bytes of information about the tx
2697 * but don't include ethernet FCS because hardware appends it
2699 min_tx_space
= (adapter
->max_frame_size
+
2700 sizeof(struct e1000_tx_desc
) -
2702 min_tx_space
= ALIGN(min_tx_space
, 1024);
2703 min_tx_space
>>= 10;
2704 /* software strips receive CRC, so leave room for it */
2705 min_rx_space
= adapter
->max_frame_size
;
2706 min_rx_space
= ALIGN(min_rx_space
, 1024);
2707 min_rx_space
>>= 10;
2710 * If current Tx allocation is less than the min Tx FIFO size,
2711 * and the min Tx FIFO size is less than the current Rx FIFO
2712 * allocation, take space away from current Rx allocation
2714 if ((tx_space
< min_tx_space
) &&
2715 ((min_tx_space
- tx_space
) < pba
)) {
2716 pba
-= min_tx_space
- tx_space
;
2719 * if short on Rx space, Rx wins and must trump tx
2720 * adjustment or use Early Receive if available
2722 if ((pba
< min_rx_space
) &&
2723 (!(adapter
->flags
& FLAG_HAS_ERT
)))
2724 /* ERT enabled in e1000_configure_rx */
2733 * flow control settings
2735 * The high water mark must be low enough to fit one full frame
2736 * (or the size used for early receive) above it in the Rx FIFO.
2737 * Set it to the lower of:
2738 * - 90% of the Rx FIFO size, and
2739 * - the full Rx FIFO size minus the early receive size (for parts
2740 * with ERT support assuming ERT set to E1000_ERT_2048), or
2741 * - the full Rx FIFO size minus one full frame
2743 if (hw
->mac
.type
== e1000_pchlan
) {
2745 * Workaround PCH LOM adapter hangs with certain network
2746 * loads. If hangs persist, try disabling Tx flow control.
2748 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
2749 fc
->high_water
= 0x3500;
2750 fc
->low_water
= 0x1500;
2752 fc
->high_water
= 0x5000;
2753 fc
->low_water
= 0x3000;
2756 if ((adapter
->flags
& FLAG_HAS_ERT
) &&
2757 (adapter
->netdev
->mtu
> ETH_DATA_LEN
))
2758 hwm
= min(((pba
<< 10) * 9 / 10),
2759 ((pba
<< 10) - (E1000_ERT_2048
<< 3)));
2761 hwm
= min(((pba
<< 10) * 9 / 10),
2762 ((pba
<< 10) - adapter
->max_frame_size
));
2764 fc
->high_water
= hwm
& E1000_FCRTH_RTH
; /* 8-byte granularity */
2765 fc
->low_water
= fc
->high_water
- 8;
2768 if (adapter
->flags
& FLAG_DISABLE_FC_PAUSE_TIME
)
2769 fc
->pause_time
= 0xFFFF;
2771 fc
->pause_time
= E1000_FC_PAUSE_TIME
;
2773 fc
->current_mode
= fc
->requested_mode
;
2775 /* Allow time for pending master requests to run */
2776 mac
->ops
.reset_hw(hw
);
2779 * For parts with AMT enabled, let the firmware know
2780 * that the network interface is in control
2782 if (adapter
->flags
& FLAG_HAS_AMT
)
2783 e1000_get_hw_control(adapter
);
2786 if (adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
)
2787 e1e_wphy(&adapter
->hw
, BM_WUC
, 0);
2789 if (mac
->ops
.init_hw(hw
))
2790 e_err("Hardware Error\n");
2792 /* additional part of the flow-control workaround above */
2793 if (hw
->mac
.type
== e1000_pchlan
)
2794 ew32(FCRTV_PCH
, 0x1000);
2796 e1000_update_mng_vlan(adapter
);
2798 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
2799 ew32(VET
, ETH_P_8021Q
);
2801 e1000e_reset_adaptive(hw
);
2802 e1000_get_phy_info(hw
);
2804 if ((adapter
->flags
& FLAG_HAS_SMART_POWER_DOWN
) &&
2805 !(adapter
->flags
& FLAG_SMART_POWER_DOWN
)) {
2808 * speed up time to link by disabling smart power down, ignore
2809 * the return value of this function because there is nothing
2810 * different we would do if it failed
2812 e1e_rphy(hw
, IGP02E1000_PHY_POWER_MGMT
, &phy_data
);
2813 phy_data
&= ~IGP02E1000_PM_SPD
;
2814 e1e_wphy(hw
, IGP02E1000_PHY_POWER_MGMT
, phy_data
);
2818 int e1000e_up(struct e1000_adapter
*adapter
)
2820 struct e1000_hw
*hw
= &adapter
->hw
;
2822 /* DMA latency requirement to workaround early-receive/jumbo issue */
2823 if (adapter
->flags
& FLAG_HAS_ERT
)
2824 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY
,
2825 adapter
->netdev
->name
,
2826 PM_QOS_DEFAULT_VALUE
);
2828 /* hardware has been reset, we need to reload some things */
2829 e1000_configure(adapter
);
2831 clear_bit(__E1000_DOWN
, &adapter
->state
);
2833 napi_enable(&adapter
->napi
);
2834 if (adapter
->msix_entries
)
2835 e1000_configure_msix(adapter
);
2836 e1000_irq_enable(adapter
);
2838 netif_wake_queue(adapter
->netdev
);
2840 /* fire a link change interrupt to start the watchdog */
2841 ew32(ICS
, E1000_ICS_LSC
);
2845 void e1000e_down(struct e1000_adapter
*adapter
)
2847 struct net_device
*netdev
= adapter
->netdev
;
2848 struct e1000_hw
*hw
= &adapter
->hw
;
2852 * signal that we're down so the interrupt handler does not
2853 * reschedule our watchdog timer
2855 set_bit(__E1000_DOWN
, &adapter
->state
);
2857 /* disable receives in the hardware */
2859 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
2860 /* flush and sleep below */
2862 netif_stop_queue(netdev
);
2864 /* disable transmits in the hardware */
2866 tctl
&= ~E1000_TCTL_EN
;
2868 /* flush both disables and wait for them to finish */
2872 napi_disable(&adapter
->napi
);
2873 e1000_irq_disable(adapter
);
2875 del_timer_sync(&adapter
->watchdog_timer
);
2876 del_timer_sync(&adapter
->phy_info_timer
);
2878 netif_carrier_off(netdev
);
2879 adapter
->link_speed
= 0;
2880 adapter
->link_duplex
= 0;
2882 if (!pci_channel_offline(adapter
->pdev
))
2883 e1000e_reset(adapter
);
2884 e1000_clean_tx_ring(adapter
);
2885 e1000_clean_rx_ring(adapter
);
2887 if (adapter
->flags
& FLAG_HAS_ERT
)
2888 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY
,
2889 adapter
->netdev
->name
);
2892 * TODO: for power management, we could drop the link and
2893 * pci_disable_device here.
2897 void e1000e_reinit_locked(struct e1000_adapter
*adapter
)
2900 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->state
))
2902 e1000e_down(adapter
);
2904 clear_bit(__E1000_RESETTING
, &adapter
->state
);
2908 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
2909 * @adapter: board private structure to initialize
2911 * e1000_sw_init initializes the Adapter private data structure.
2912 * Fields are initialized based on PCI device information and
2913 * OS network device settings (MTU size).
2915 static int __devinit
e1000_sw_init(struct e1000_adapter
*adapter
)
2917 struct net_device
*netdev
= adapter
->netdev
;
2919 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
;
2920 adapter
->rx_ps_bsize0
= 128;
2921 adapter
->max_frame_size
= netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
2922 adapter
->min_frame_size
= ETH_ZLEN
+ ETH_FCS_LEN
;
2924 e1000e_set_interrupt_capability(adapter
);
2926 if (e1000_alloc_queues(adapter
))
2929 /* Explicitly disable IRQ since the NIC can be in any state. */
2930 e1000_irq_disable(adapter
);
2932 set_bit(__E1000_DOWN
, &adapter
->state
);
2937 * e1000_intr_msi_test - Interrupt Handler
2938 * @irq: interrupt number
2939 * @data: pointer to a network interface device structure
2941 static irqreturn_t
e1000_intr_msi_test(int irq
, void *data
)
2943 struct net_device
*netdev
= data
;
2944 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2945 struct e1000_hw
*hw
= &adapter
->hw
;
2946 u32 icr
= er32(ICR
);
2948 e_dbg("icr is %08X\n", icr
);
2949 if (icr
& E1000_ICR_RXSEQ
) {
2950 adapter
->flags
&= ~FLAG_MSI_TEST_FAILED
;
2958 * e1000_test_msi_interrupt - Returns 0 for successful test
2959 * @adapter: board private struct
2961 * code flow taken from tg3.c
2963 static int e1000_test_msi_interrupt(struct e1000_adapter
*adapter
)
2965 struct net_device
*netdev
= adapter
->netdev
;
2966 struct e1000_hw
*hw
= &adapter
->hw
;
2969 /* poll_enable hasn't been called yet, so don't need disable */
2970 /* clear any pending events */
2973 /* free the real vector and request a test handler */
2974 e1000_free_irq(adapter
);
2975 e1000e_reset_interrupt_capability(adapter
);
2977 /* Assume that the test fails, if it succeeds then the test
2978 * MSI irq handler will unset this flag */
2979 adapter
->flags
|= FLAG_MSI_TEST_FAILED
;
2981 err
= pci_enable_msi(adapter
->pdev
);
2983 goto msi_test_failed
;
2985 err
= request_irq(adapter
->pdev
->irq
, e1000_intr_msi_test
, 0,
2986 netdev
->name
, netdev
);
2988 pci_disable_msi(adapter
->pdev
);
2989 goto msi_test_failed
;
2994 e1000_irq_enable(adapter
);
2996 /* fire an unusual interrupt on the test handler */
2997 ew32(ICS
, E1000_ICS_RXSEQ
);
3001 e1000_irq_disable(adapter
);
3005 if (adapter
->flags
& FLAG_MSI_TEST_FAILED
) {
3006 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
3008 e_info("MSI interrupt test failed!\n");
3011 free_irq(adapter
->pdev
->irq
, netdev
);
3012 pci_disable_msi(adapter
->pdev
);
3015 goto msi_test_failed
;
3017 /* okay so the test worked, restore settings */
3018 e_dbg("MSI interrupt test succeeded!\n");
3020 e1000e_set_interrupt_capability(adapter
);
3021 e1000_request_irq(adapter
);
3026 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3027 * @adapter: board private struct
3029 * code flow taken from tg3.c, called with e1000 interrupts disabled.
3031 static int e1000_test_msi(struct e1000_adapter
*adapter
)
3036 if (!(adapter
->flags
& FLAG_MSI_ENABLED
))
3039 /* disable SERR in case the MSI write causes a master abort */
3040 pci_read_config_word(adapter
->pdev
, PCI_COMMAND
, &pci_cmd
);
3041 pci_write_config_word(adapter
->pdev
, PCI_COMMAND
,
3042 pci_cmd
& ~PCI_COMMAND_SERR
);
3044 err
= e1000_test_msi_interrupt(adapter
);
3046 /* restore previous setting of command word */
3047 pci_write_config_word(adapter
->pdev
, PCI_COMMAND
, pci_cmd
);
3053 /* EIO means MSI test failed */
3057 /* back to INTx mode */
3058 e_warn("MSI interrupt test failed, using legacy interrupt.\n");
3060 e1000_free_irq(adapter
);
3062 err
= e1000_request_irq(adapter
);
3068 * e1000_open - Called when a network interface is made active
3069 * @netdev: network interface device structure
3071 * Returns 0 on success, negative value on failure
3073 * The open entry point is called when a network interface is made
3074 * active by the system (IFF_UP). At this point all resources needed
3075 * for transmit and receive operations are allocated, the interrupt
3076 * handler is registered with the OS, the watchdog timer is started,
3077 * and the stack is notified that the interface is ready.
3079 static int e1000_open(struct net_device
*netdev
)
3081 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3082 struct e1000_hw
*hw
= &adapter
->hw
;
3085 /* disallow open during test */
3086 if (test_bit(__E1000_TESTING
, &adapter
->state
))
3089 netif_carrier_off(netdev
);
3091 /* allocate transmit descriptors */
3092 err
= e1000e_setup_tx_resources(adapter
);
3096 /* allocate receive descriptors */
3097 err
= e1000e_setup_rx_resources(adapter
);
3101 e1000e_power_up_phy(adapter
);
3103 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
3104 if ((adapter
->hw
.mng_cookie
.status
&
3105 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
))
3106 e1000_update_mng_vlan(adapter
);
3109 * If AMT is enabled, let the firmware know that the network
3110 * interface is now open
3112 if (adapter
->flags
& FLAG_HAS_AMT
)
3113 e1000_get_hw_control(adapter
);
3116 * before we allocate an interrupt, we must be ready to handle it.
3117 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3118 * as soon as we call pci_request_irq, so we have to setup our
3119 * clean_rx handler before we do so.
3121 e1000_configure(adapter
);
3123 err
= e1000_request_irq(adapter
);
3128 * Work around PCIe errata with MSI interrupts causing some chipsets to
3129 * ignore e1000e MSI messages, which means we need to test our MSI
3132 if (adapter
->int_mode
!= E1000E_INT_MODE_LEGACY
) {
3133 err
= e1000_test_msi(adapter
);
3135 e_err("Interrupt allocation failed\n");
3140 /* From here on the code is the same as e1000e_up() */
3141 clear_bit(__E1000_DOWN
, &adapter
->state
);
3143 napi_enable(&adapter
->napi
);
3145 e1000_irq_enable(adapter
);
3147 netif_start_queue(netdev
);
3149 /* fire a link status change interrupt to start the watchdog */
3150 ew32(ICS
, E1000_ICS_LSC
);
3155 e1000_release_hw_control(adapter
);
3156 e1000_power_down_phy(adapter
);
3157 e1000e_free_rx_resources(adapter
);
3159 e1000e_free_tx_resources(adapter
);
3161 e1000e_reset(adapter
);
3167 * e1000_close - Disables a network interface
3168 * @netdev: network interface device structure
3170 * Returns 0, this is not allowed to fail
3172 * The close entry point is called when an interface is de-activated
3173 * by the OS. The hardware is still under the drivers control, but
3174 * needs to be disabled. A global MAC reset is issued to stop the
3175 * hardware, and all transmit and receive resources are freed.
3177 static int e1000_close(struct net_device
*netdev
)
3179 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3181 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->state
));
3182 e1000e_down(adapter
);
3183 e1000_power_down_phy(adapter
);
3184 e1000_free_irq(adapter
);
3186 e1000e_free_tx_resources(adapter
);
3187 e1000e_free_rx_resources(adapter
);
3190 * kill manageability vlan ID if supported, but not if a vlan with
3191 * the same ID is registered on the host OS (let 8021q kill it)
3193 if ((adapter
->hw
.mng_cookie
.status
&
3194 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
3196 vlan_group_get_device(adapter
->vlgrp
, adapter
->mng_vlan_id
)))
3197 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
3200 * If AMT is enabled, let the firmware know that the network
3201 * interface is now closed
3203 if (adapter
->flags
& FLAG_HAS_AMT
)
3204 e1000_release_hw_control(adapter
);
3209 * e1000_set_mac - Change the Ethernet Address of the NIC
3210 * @netdev: network interface device structure
3211 * @p: pointer to an address structure
3213 * Returns 0 on success, negative on failure
3215 static int e1000_set_mac(struct net_device
*netdev
, void *p
)
3217 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3218 struct sockaddr
*addr
= p
;
3220 if (!is_valid_ether_addr(addr
->sa_data
))
3221 return -EADDRNOTAVAIL
;
3223 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
3224 memcpy(adapter
->hw
.mac
.addr
, addr
->sa_data
, netdev
->addr_len
);
3226 e1000e_rar_set(&adapter
->hw
, adapter
->hw
.mac
.addr
, 0);
3228 if (adapter
->flags
& FLAG_RESET_OVERWRITES_LAA
) {
3229 /* activate the work around */
3230 e1000e_set_laa_state_82571(&adapter
->hw
, 1);
3233 * Hold a copy of the LAA in RAR[14] This is done so that
3234 * between the time RAR[0] gets clobbered and the time it
3235 * gets fixed (in e1000_watchdog), the actual LAA is in one
3236 * of the RARs and no incoming packets directed to this port
3237 * are dropped. Eventually the LAA will be in RAR[0] and
3240 e1000e_rar_set(&adapter
->hw
,
3241 adapter
->hw
.mac
.addr
,
3242 adapter
->hw
.mac
.rar_entry_count
- 1);
3249 * e1000e_update_phy_task - work thread to update phy
3250 * @work: pointer to our work struct
3252 * this worker thread exists because we must acquire a
3253 * semaphore to read the phy, which we could msleep while
3254 * waiting for it, and we can't msleep in a timer.
3256 static void e1000e_update_phy_task(struct work_struct
*work
)
3258 struct e1000_adapter
*adapter
= container_of(work
,
3259 struct e1000_adapter
, update_phy_task
);
3260 e1000_get_phy_info(&adapter
->hw
);
3264 * Need to wait a few seconds after link up to get diagnostic information from
3267 static void e1000_update_phy_info(unsigned long data
)
3269 struct e1000_adapter
*adapter
= (struct e1000_adapter
*) data
;
3270 schedule_work(&adapter
->update_phy_task
);
3274 * e1000e_update_stats - Update the board statistics counters
3275 * @adapter: board private structure
3277 void e1000e_update_stats(struct e1000_adapter
*adapter
)
3279 struct net_device
*netdev
= adapter
->netdev
;
3280 struct e1000_hw
*hw
= &adapter
->hw
;
3281 struct pci_dev
*pdev
= adapter
->pdev
;
3285 * Prevent stats update while adapter is being reset, or if the pci
3286 * connection is down.
3288 if (adapter
->link_speed
== 0)
3290 if (pci_channel_offline(pdev
))
3293 adapter
->stats
.crcerrs
+= er32(CRCERRS
);
3294 adapter
->stats
.gprc
+= er32(GPRC
);
3295 adapter
->stats
.gorc
+= er32(GORCL
);
3296 er32(GORCH
); /* Clear gorc */
3297 adapter
->stats
.bprc
+= er32(BPRC
);
3298 adapter
->stats
.mprc
+= er32(MPRC
);
3299 adapter
->stats
.roc
+= er32(ROC
);
3301 adapter
->stats
.mpc
+= er32(MPC
);
3302 if ((hw
->phy
.type
== e1000_phy_82578
) ||
3303 (hw
->phy
.type
== e1000_phy_82577
)) {
3304 e1e_rphy(hw
, HV_SCC_UPPER
, &phy_data
);
3305 if (!e1e_rphy(hw
, HV_SCC_LOWER
, &phy_data
))
3306 adapter
->stats
.scc
+= phy_data
;
3308 e1e_rphy(hw
, HV_ECOL_UPPER
, &phy_data
);
3309 if (!e1e_rphy(hw
, HV_ECOL_LOWER
, &phy_data
))
3310 adapter
->stats
.ecol
+= phy_data
;
3312 e1e_rphy(hw
, HV_MCC_UPPER
, &phy_data
);
3313 if (!e1e_rphy(hw
, HV_MCC_LOWER
, &phy_data
))
3314 adapter
->stats
.mcc
+= phy_data
;
3316 e1e_rphy(hw
, HV_LATECOL_UPPER
, &phy_data
);
3317 if (!e1e_rphy(hw
, HV_LATECOL_LOWER
, &phy_data
))
3318 adapter
->stats
.latecol
+= phy_data
;
3320 e1e_rphy(hw
, HV_DC_UPPER
, &phy_data
);
3321 if (!e1e_rphy(hw
, HV_DC_LOWER
, &phy_data
))
3322 adapter
->stats
.dc
+= phy_data
;
3324 adapter
->stats
.scc
+= er32(SCC
);
3325 adapter
->stats
.ecol
+= er32(ECOL
);
3326 adapter
->stats
.mcc
+= er32(MCC
);
3327 adapter
->stats
.latecol
+= er32(LATECOL
);
3328 adapter
->stats
.dc
+= er32(DC
);
3330 adapter
->stats
.xonrxc
+= er32(XONRXC
);
3331 adapter
->stats
.xontxc
+= er32(XONTXC
);
3332 adapter
->stats
.xoffrxc
+= er32(XOFFRXC
);
3333 adapter
->stats
.xofftxc
+= er32(XOFFTXC
);
3334 adapter
->stats
.gptc
+= er32(GPTC
);
3335 adapter
->stats
.gotc
+= er32(GOTCL
);
3336 er32(GOTCH
); /* Clear gotc */
3337 adapter
->stats
.rnbc
+= er32(RNBC
);
3338 adapter
->stats
.ruc
+= er32(RUC
);
3340 adapter
->stats
.mptc
+= er32(MPTC
);
3341 adapter
->stats
.bptc
+= er32(BPTC
);
3343 /* used for adaptive IFS */
3345 hw
->mac
.tx_packet_delta
= er32(TPT
);
3346 adapter
->stats
.tpt
+= hw
->mac
.tx_packet_delta
;
3347 if ((hw
->phy
.type
== e1000_phy_82578
) ||
3348 (hw
->phy
.type
== e1000_phy_82577
)) {
3349 e1e_rphy(hw
, HV_COLC_UPPER
, &phy_data
);
3350 if (!e1e_rphy(hw
, HV_COLC_LOWER
, &phy_data
))
3351 hw
->mac
.collision_delta
= phy_data
;
3353 hw
->mac
.collision_delta
= er32(COLC
);
3355 adapter
->stats
.colc
+= hw
->mac
.collision_delta
;
3357 adapter
->stats
.algnerrc
+= er32(ALGNERRC
);
3358 adapter
->stats
.rxerrc
+= er32(RXERRC
);
3359 if ((hw
->phy
.type
== e1000_phy_82578
) ||
3360 (hw
->phy
.type
== e1000_phy_82577
)) {
3361 e1e_rphy(hw
, HV_TNCRS_UPPER
, &phy_data
);
3362 if (!e1e_rphy(hw
, HV_TNCRS_LOWER
, &phy_data
))
3363 adapter
->stats
.tncrs
+= phy_data
;
3365 if ((hw
->mac
.type
!= e1000_82574
) &&
3366 (hw
->mac
.type
!= e1000_82583
))
3367 adapter
->stats
.tncrs
+= er32(TNCRS
);
3369 adapter
->stats
.cexterr
+= er32(CEXTERR
);
3370 adapter
->stats
.tsctc
+= er32(TSCTC
);
3371 adapter
->stats
.tsctfc
+= er32(TSCTFC
);
3373 /* Fill out the OS statistics structure */
3374 netdev
->stats
.multicast
= adapter
->stats
.mprc
;
3375 netdev
->stats
.collisions
= adapter
->stats
.colc
;
3380 * RLEC on some newer hardware can be incorrect so build
3381 * our own version based on RUC and ROC
3383 netdev
->stats
.rx_errors
= adapter
->stats
.rxerrc
+
3384 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3385 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3386 adapter
->stats
.cexterr
;
3387 netdev
->stats
.rx_length_errors
= adapter
->stats
.ruc
+
3389 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3390 netdev
->stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3391 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3394 netdev
->stats
.tx_errors
= adapter
->stats
.ecol
+
3395 adapter
->stats
.latecol
;
3396 netdev
->stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3397 netdev
->stats
.tx_window_errors
= adapter
->stats
.latecol
;
3398 netdev
->stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3400 /* Tx Dropped needs to be maintained elsewhere */
3402 /* Management Stats */
3403 adapter
->stats
.mgptc
+= er32(MGTPTC
);
3404 adapter
->stats
.mgprc
+= er32(MGTPRC
);
3405 adapter
->stats
.mgpdc
+= er32(MGTPDC
);
3409 * e1000_phy_read_status - Update the PHY register status snapshot
3410 * @adapter: board private structure
3412 static void e1000_phy_read_status(struct e1000_adapter
*adapter
)
3414 struct e1000_hw
*hw
= &adapter
->hw
;
3415 struct e1000_phy_regs
*phy
= &adapter
->phy_regs
;
3418 if ((er32(STATUS
) & E1000_STATUS_LU
) &&
3419 (adapter
->hw
.phy
.media_type
== e1000_media_type_copper
)) {
3420 ret_val
= e1e_rphy(hw
, PHY_CONTROL
, &phy
->bmcr
);
3421 ret_val
|= e1e_rphy(hw
, PHY_STATUS
, &phy
->bmsr
);
3422 ret_val
|= e1e_rphy(hw
, PHY_AUTONEG_ADV
, &phy
->advertise
);
3423 ret_val
|= e1e_rphy(hw
, PHY_LP_ABILITY
, &phy
->lpa
);
3424 ret_val
|= e1e_rphy(hw
, PHY_AUTONEG_EXP
, &phy
->expansion
);
3425 ret_val
|= e1e_rphy(hw
, PHY_1000T_CTRL
, &phy
->ctrl1000
);
3426 ret_val
|= e1e_rphy(hw
, PHY_1000T_STATUS
, &phy
->stat1000
);
3427 ret_val
|= e1e_rphy(hw
, PHY_EXT_STATUS
, &phy
->estatus
);
3429 e_warn("Error reading PHY register\n");
3432 * Do not read PHY registers if link is not up
3433 * Set values to typical power-on defaults
3435 phy
->bmcr
= (BMCR_SPEED1000
| BMCR_ANENABLE
| BMCR_FULLDPLX
);
3436 phy
->bmsr
= (BMSR_100FULL
| BMSR_100HALF
| BMSR_10FULL
|
3437 BMSR_10HALF
| BMSR_ESTATEN
| BMSR_ANEGCAPABLE
|
3439 phy
->advertise
= (ADVERTISE_PAUSE_ASYM
| ADVERTISE_PAUSE_CAP
|
3440 ADVERTISE_ALL
| ADVERTISE_CSMA
);
3442 phy
->expansion
= EXPANSION_ENABLENPAGE
;
3443 phy
->ctrl1000
= ADVERTISE_1000FULL
;
3445 phy
->estatus
= (ESTATUS_1000_TFULL
| ESTATUS_1000_THALF
);
3449 static void e1000_print_link_info(struct e1000_adapter
*adapter
)
3451 struct e1000_hw
*hw
= &adapter
->hw
;
3452 u32 ctrl
= er32(CTRL
);
3454 /* Link status message must follow this format for user tools */
3455 printk(KERN_INFO
"e1000e: %s NIC Link is Up %d Mbps %s, "
3456 "Flow Control: %s\n",
3457 adapter
->netdev
->name
,
3458 adapter
->link_speed
,
3459 (adapter
->link_duplex
== FULL_DUPLEX
) ?
3460 "Full Duplex" : "Half Duplex",
3461 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
& E1000_CTRL_RFCE
)) ?
3463 ((ctrl
& E1000_CTRL_RFCE
) ? "RX" :
3464 ((ctrl
& E1000_CTRL_TFCE
) ? "TX" : "None" )));
3467 bool e1000e_has_link(struct e1000_adapter
*adapter
)
3469 struct e1000_hw
*hw
= &adapter
->hw
;
3470 bool link_active
= 0;
3474 * get_link_status is set on LSC (link status) interrupt or
3475 * Rx sequence error interrupt. get_link_status will stay
3476 * false until the check_for_link establishes link
3477 * for copper adapters ONLY
3479 switch (hw
->phy
.media_type
) {
3480 case e1000_media_type_copper
:
3481 if (hw
->mac
.get_link_status
) {
3482 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
3483 link_active
= !hw
->mac
.get_link_status
;
3488 case e1000_media_type_fiber
:
3489 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
3490 link_active
= !!(er32(STATUS
) & E1000_STATUS_LU
);
3492 case e1000_media_type_internal_serdes
:
3493 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
3494 link_active
= adapter
->hw
.mac
.serdes_has_link
;
3497 case e1000_media_type_unknown
:
3501 if ((ret_val
== E1000_ERR_PHY
) && (hw
->phy
.type
== e1000_phy_igp_3
) &&
3502 (er32(CTRL
) & E1000_PHY_CTRL_GBE_DISABLE
)) {
3503 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
3504 e_info("Gigabit has been disabled, downgrading speed\n");
3510 static void e1000e_enable_receives(struct e1000_adapter
*adapter
)
3512 /* make sure the receive unit is started */
3513 if ((adapter
->flags
& FLAG_RX_NEEDS_RESTART
) &&
3514 (adapter
->flags
& FLAG_RX_RESTART_NOW
)) {
3515 struct e1000_hw
*hw
= &adapter
->hw
;
3516 u32 rctl
= er32(RCTL
);
3517 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
3518 adapter
->flags
&= ~FLAG_RX_RESTART_NOW
;
3523 * e1000_watchdog - Timer Call-back
3524 * @data: pointer to adapter cast into an unsigned long
3526 static void e1000_watchdog(unsigned long data
)
3528 struct e1000_adapter
*adapter
= (struct e1000_adapter
*) data
;
3530 /* Do the rest outside of interrupt context */
3531 schedule_work(&adapter
->watchdog_task
);
3533 /* TODO: make this use queue_delayed_work() */
3536 static void e1000_watchdog_task(struct work_struct
*work
)
3538 struct e1000_adapter
*adapter
= container_of(work
,
3539 struct e1000_adapter
, watchdog_task
);
3540 struct net_device
*netdev
= adapter
->netdev
;
3541 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
3542 struct e1000_phy_info
*phy
= &adapter
->hw
.phy
;
3543 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3544 struct e1000_hw
*hw
= &adapter
->hw
;
3548 link
= e1000e_has_link(adapter
);
3549 if ((netif_carrier_ok(netdev
)) && link
) {
3550 e1000e_enable_receives(adapter
);
3554 if ((e1000e_enable_tx_pkt_filtering(hw
)) &&
3555 (adapter
->mng_vlan_id
!= adapter
->hw
.mng_cookie
.vlan_id
))
3556 e1000_update_mng_vlan(adapter
);
3559 if (!netif_carrier_ok(netdev
)) {
3561 /* update snapshot of PHY registers on LSC */
3562 e1000_phy_read_status(adapter
);
3563 mac
->ops
.get_link_up_info(&adapter
->hw
,
3564 &adapter
->link_speed
,
3565 &adapter
->link_duplex
);
3566 e1000_print_link_info(adapter
);
3568 * On supported PHYs, check for duplex mismatch only
3569 * if link has autonegotiated at 10/100 half
3571 if ((hw
->phy
.type
== e1000_phy_igp_3
||
3572 hw
->phy
.type
== e1000_phy_bm
) &&
3573 (hw
->mac
.autoneg
== true) &&
3574 (adapter
->link_speed
== SPEED_10
||
3575 adapter
->link_speed
== SPEED_100
) &&
3576 (adapter
->link_duplex
== HALF_DUPLEX
)) {
3579 e1e_rphy(hw
, PHY_AUTONEG_EXP
, &autoneg_exp
);
3581 if (!(autoneg_exp
& NWAY_ER_LP_NWAY_CAPS
))
3582 e_info("Autonegotiated half duplex but"
3583 " link partner cannot autoneg. "
3584 " Try forcing full duplex if "
3585 "link gets many collisions.\n");
3588 /* adjust timeout factor according to speed/duplex */
3589 adapter
->tx_timeout_factor
= 1;
3590 switch (adapter
->link_speed
) {
3593 adapter
->tx_timeout_factor
= 16;
3597 adapter
->tx_timeout_factor
= 10;
3602 * workaround: re-program speed mode bit after
3605 if ((adapter
->flags
& FLAG_TARC_SPEED_MODE_BIT
) &&
3608 tarc0
= er32(TARC(0));
3609 tarc0
&= ~SPEED_MODE_BIT
;
3610 ew32(TARC(0), tarc0
);
3614 * disable TSO for pcie and 10/100 speeds, to avoid
3615 * some hardware issues
3617 if (!(adapter
->flags
& FLAG_TSO_FORCE
)) {
3618 switch (adapter
->link_speed
) {
3621 e_info("10/100 speed: disabling TSO\n");
3622 netdev
->features
&= ~NETIF_F_TSO
;
3623 netdev
->features
&= ~NETIF_F_TSO6
;
3626 netdev
->features
|= NETIF_F_TSO
;
3627 netdev
->features
|= NETIF_F_TSO6
;
3636 * enable transmits in the hardware, need to do this
3637 * after setting TARC(0)
3640 tctl
|= E1000_TCTL_EN
;
3644 * Perform any post-link-up configuration before
3645 * reporting link up.
3647 if (phy
->ops
.cfg_on_link_up
)
3648 phy
->ops
.cfg_on_link_up(hw
);
3650 netif_carrier_on(netdev
);
3652 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
3653 mod_timer(&adapter
->phy_info_timer
,
3654 round_jiffies(jiffies
+ 2 * HZ
));
3657 if (netif_carrier_ok(netdev
)) {
3658 adapter
->link_speed
= 0;
3659 adapter
->link_duplex
= 0;
3660 /* Link status message must follow this format */
3661 printk(KERN_INFO
"e1000e: %s NIC Link is Down\n",
3662 adapter
->netdev
->name
);
3663 netif_carrier_off(netdev
);
3664 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
3665 mod_timer(&adapter
->phy_info_timer
,
3666 round_jiffies(jiffies
+ 2 * HZ
));
3668 if (adapter
->flags
& FLAG_RX_NEEDS_RESTART
)
3669 schedule_work(&adapter
->reset_task
);
3674 e1000e_update_stats(adapter
);
3676 mac
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
3677 adapter
->tpt_old
= adapter
->stats
.tpt
;
3678 mac
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
3679 adapter
->colc_old
= adapter
->stats
.colc
;
3681 adapter
->gorc
= adapter
->stats
.gorc
- adapter
->gorc_old
;
3682 adapter
->gorc_old
= adapter
->stats
.gorc
;
3683 adapter
->gotc
= adapter
->stats
.gotc
- adapter
->gotc_old
;
3684 adapter
->gotc_old
= adapter
->stats
.gotc
;
3686 e1000e_update_adaptive(&adapter
->hw
);
3688 if (!netif_carrier_ok(netdev
)) {
3689 tx_pending
= (e1000_desc_unused(tx_ring
) + 1 <
3693 * We've lost link, so the controller stops DMA,
3694 * but we've got queued Tx work that's never going
3695 * to get done, so reset controller to flush Tx.
3696 * (Do the reset outside of interrupt context).
3698 adapter
->tx_timeout_count
++;
3699 schedule_work(&adapter
->reset_task
);
3700 /* return immediately since reset is imminent */
3705 /* Cause software interrupt to ensure Rx ring is cleaned */
3706 if (adapter
->msix_entries
)
3707 ew32(ICS
, adapter
->rx_ring
->ims_val
);
3709 ew32(ICS
, E1000_ICS_RXDMT0
);
3711 /* Force detection of hung controller every watchdog period */
3712 adapter
->detect_tx_hung
= 1;
3715 * With 82571 controllers, LAA may be overwritten due to controller
3716 * reset from the other port. Set the appropriate LAA in RAR[0]
3718 if (e1000e_get_laa_state_82571(hw
))
3719 e1000e_rar_set(hw
, adapter
->hw
.mac
.addr
, 0);
3721 /* Reset the timer */
3722 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
3723 mod_timer(&adapter
->watchdog_timer
,
3724 round_jiffies(jiffies
+ 2 * HZ
));
3727 #define E1000_TX_FLAGS_CSUM 0x00000001
3728 #define E1000_TX_FLAGS_VLAN 0x00000002
3729 #define E1000_TX_FLAGS_TSO 0x00000004
3730 #define E1000_TX_FLAGS_IPV4 0x00000008
3731 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
3732 #define E1000_TX_FLAGS_VLAN_SHIFT 16
3734 static int e1000_tso(struct e1000_adapter
*adapter
,
3735 struct sk_buff
*skb
)
3737 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3738 struct e1000_context_desc
*context_desc
;
3739 struct e1000_buffer
*buffer_info
;
3742 u16 ipcse
= 0, tucse
, mss
;
3743 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
3746 if (!skb_is_gso(skb
))
3749 if (skb_header_cloned(skb
)) {
3750 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
3755 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
3756 mss
= skb_shinfo(skb
)->gso_size
;
3757 if (skb
->protocol
== htons(ETH_P_IP
)) {
3758 struct iphdr
*iph
= ip_hdr(skb
);
3761 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
, iph
->daddr
,
3763 cmd_length
= E1000_TXD_CMD_IP
;
3764 ipcse
= skb_transport_offset(skb
) - 1;
3765 } else if (skb_is_gso_v6(skb
)) {
3766 ipv6_hdr(skb
)->payload_len
= 0;
3767 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
3768 &ipv6_hdr(skb
)->daddr
,
3772 ipcss
= skb_network_offset(skb
);
3773 ipcso
= (void *)&(ip_hdr(skb
)->check
) - (void *)skb
->data
;
3774 tucss
= skb_transport_offset(skb
);
3775 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
3778 cmd_length
|= (E1000_TXD_CMD_DEXT
| E1000_TXD_CMD_TSE
|
3779 E1000_TXD_CMD_TCP
| (skb
->len
- (hdr_len
)));
3781 i
= tx_ring
->next_to_use
;
3782 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
3783 buffer_info
= &tx_ring
->buffer_info
[i
];
3785 context_desc
->lower_setup
.ip_fields
.ipcss
= ipcss
;
3786 context_desc
->lower_setup
.ip_fields
.ipcso
= ipcso
;
3787 context_desc
->lower_setup
.ip_fields
.ipcse
= cpu_to_le16(ipcse
);
3788 context_desc
->upper_setup
.tcp_fields
.tucss
= tucss
;
3789 context_desc
->upper_setup
.tcp_fields
.tucso
= tucso
;
3790 context_desc
->upper_setup
.tcp_fields
.tucse
= cpu_to_le16(tucse
);
3791 context_desc
->tcp_seg_setup
.fields
.mss
= cpu_to_le16(mss
);
3792 context_desc
->tcp_seg_setup
.fields
.hdr_len
= hdr_len
;
3793 context_desc
->cmd_and_length
= cpu_to_le32(cmd_length
);
3795 buffer_info
->time_stamp
= jiffies
;
3796 buffer_info
->next_to_watch
= i
;
3799 if (i
== tx_ring
->count
)
3801 tx_ring
->next_to_use
= i
;
3806 static bool e1000_tx_csum(struct e1000_adapter
*adapter
, struct sk_buff
*skb
)
3808 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3809 struct e1000_context_desc
*context_desc
;
3810 struct e1000_buffer
*buffer_info
;
3813 u32 cmd_len
= E1000_TXD_CMD_DEXT
;
3816 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
3819 if (skb
->protocol
== cpu_to_be16(ETH_P_8021Q
))
3820 protocol
= vlan_eth_hdr(skb
)->h_vlan_encapsulated_proto
;
3822 protocol
= skb
->protocol
;
3825 case cpu_to_be16(ETH_P_IP
):
3826 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
3827 cmd_len
|= E1000_TXD_CMD_TCP
;
3829 case cpu_to_be16(ETH_P_IPV6
):
3830 /* XXX not handling all IPV6 headers */
3831 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
3832 cmd_len
|= E1000_TXD_CMD_TCP
;
3835 if (unlikely(net_ratelimit()))
3836 e_warn("checksum_partial proto=%x!\n",
3837 be16_to_cpu(protocol
));
3841 css
= skb_transport_offset(skb
);
3843 i
= tx_ring
->next_to_use
;
3844 buffer_info
= &tx_ring
->buffer_info
[i
];
3845 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
3847 context_desc
->lower_setup
.ip_config
= 0;
3848 context_desc
->upper_setup
.tcp_fields
.tucss
= css
;
3849 context_desc
->upper_setup
.tcp_fields
.tucso
=
3850 css
+ skb
->csum_offset
;
3851 context_desc
->upper_setup
.tcp_fields
.tucse
= 0;
3852 context_desc
->tcp_seg_setup
.data
= 0;
3853 context_desc
->cmd_and_length
= cpu_to_le32(cmd_len
);
3855 buffer_info
->time_stamp
= jiffies
;
3856 buffer_info
->next_to_watch
= i
;
3859 if (i
== tx_ring
->count
)
3861 tx_ring
->next_to_use
= i
;
3866 #define E1000_MAX_PER_TXD 8192
3867 #define E1000_MAX_TXD_PWR 12
3869 static int e1000_tx_map(struct e1000_adapter
*adapter
,
3870 struct sk_buff
*skb
, unsigned int first
,
3871 unsigned int max_per_txd
, unsigned int nr_frags
,
3874 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3875 struct pci_dev
*pdev
= adapter
->pdev
;
3876 struct e1000_buffer
*buffer_info
;
3877 unsigned int len
= skb_headlen(skb
);
3878 unsigned int offset
= 0, size
, count
= 0, i
;
3881 i
= tx_ring
->next_to_use
;
3884 buffer_info
= &tx_ring
->buffer_info
[i
];
3885 size
= min(len
, max_per_txd
);
3887 buffer_info
->length
= size
;
3888 buffer_info
->time_stamp
= jiffies
;
3889 buffer_info
->next_to_watch
= i
;
3890 buffer_info
->dma
= pci_map_single(pdev
, skb
->data
+ offset
,
3891 size
, PCI_DMA_TODEVICE
);
3892 buffer_info
->mapped_as_page
= false;
3893 if (pci_dma_mapping_error(pdev
, buffer_info
->dma
))
3902 if (i
== tx_ring
->count
)
3907 for (f
= 0; f
< nr_frags
; f
++) {
3908 struct skb_frag_struct
*frag
;
3910 frag
= &skb_shinfo(skb
)->frags
[f
];
3912 offset
= frag
->page_offset
;
3916 if (i
== tx_ring
->count
)
3919 buffer_info
= &tx_ring
->buffer_info
[i
];
3920 size
= min(len
, max_per_txd
);
3922 buffer_info
->length
= size
;
3923 buffer_info
->time_stamp
= jiffies
;
3924 buffer_info
->next_to_watch
= i
;
3925 buffer_info
->dma
= pci_map_page(pdev
, frag
->page
,
3928 buffer_info
->mapped_as_page
= true;
3929 if (pci_dma_mapping_error(pdev
, buffer_info
->dma
))
3938 tx_ring
->buffer_info
[i
].skb
= skb
;
3939 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
3944 dev_err(&pdev
->dev
, "TX DMA map failed\n");
3945 buffer_info
->dma
= 0;
3951 i
+= tx_ring
->count
;
3953 buffer_info
= &tx_ring
->buffer_info
[i
];
3954 e1000_put_txbuf(adapter
, buffer_info
);;
3960 static void e1000_tx_queue(struct e1000_adapter
*adapter
,
3961 int tx_flags
, int count
)
3963 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3964 struct e1000_tx_desc
*tx_desc
= NULL
;
3965 struct e1000_buffer
*buffer_info
;
3966 u32 txd_upper
= 0, txd_lower
= E1000_TXD_CMD_IFCS
;
3969 if (tx_flags
& E1000_TX_FLAGS_TSO
) {
3970 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
|
3972 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
3974 if (tx_flags
& E1000_TX_FLAGS_IPV4
)
3975 txd_upper
|= E1000_TXD_POPTS_IXSM
<< 8;
3978 if (tx_flags
& E1000_TX_FLAGS_CSUM
) {
3979 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
;
3980 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
3983 if (tx_flags
& E1000_TX_FLAGS_VLAN
) {
3984 txd_lower
|= E1000_TXD_CMD_VLE
;
3985 txd_upper
|= (tx_flags
& E1000_TX_FLAGS_VLAN_MASK
);
3988 i
= tx_ring
->next_to_use
;
3991 buffer_info
= &tx_ring
->buffer_info
[i
];
3992 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3993 tx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
3994 tx_desc
->lower
.data
=
3995 cpu_to_le32(txd_lower
| buffer_info
->length
);
3996 tx_desc
->upper
.data
= cpu_to_le32(txd_upper
);
3999 if (i
== tx_ring
->count
)
4003 tx_desc
->lower
.data
|= cpu_to_le32(adapter
->txd_cmd
);
4006 * Force memory writes to complete before letting h/w
4007 * know there are new descriptors to fetch. (Only
4008 * applicable for weak-ordered memory model archs,
4013 tx_ring
->next_to_use
= i
;
4014 writel(i
, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
4016 * we need this if more than one processor can write to our tail
4017 * at a time, it synchronizes IO on IA64/Altix systems
4022 #define MINIMUM_DHCP_PACKET_SIZE 282
4023 static int e1000_transfer_dhcp_info(struct e1000_adapter
*adapter
,
4024 struct sk_buff
*skb
)
4026 struct e1000_hw
*hw
= &adapter
->hw
;
4029 if (vlan_tx_tag_present(skb
)) {
4030 if (!((vlan_tx_tag_get(skb
) == adapter
->hw
.mng_cookie
.vlan_id
) &&
4031 (adapter
->hw
.mng_cookie
.status
&
4032 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
)))
4036 if (skb
->len
<= MINIMUM_DHCP_PACKET_SIZE
)
4039 if (((struct ethhdr
*) skb
->data
)->h_proto
!= htons(ETH_P_IP
))
4043 const struct iphdr
*ip
= (struct iphdr
*)((u8
*)skb
->data
+14);
4046 if (ip
->protocol
!= IPPROTO_UDP
)
4049 udp
= (struct udphdr
*)((u8
*)ip
+ (ip
->ihl
<< 2));
4050 if (ntohs(udp
->dest
) != 67)
4053 offset
= (u8
*)udp
+ 8 - skb
->data
;
4054 length
= skb
->len
- offset
;
4055 return e1000e_mng_write_dhcp_info(hw
, (u8
*)udp
+ 8, length
);
4061 static int __e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
4063 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4065 netif_stop_queue(netdev
);
4067 * Herbert's original patch had:
4068 * smp_mb__after_netif_stop_queue();
4069 * but since that doesn't exist yet, just open code it.
4074 * We need to check again in a case another CPU has just
4075 * made room available.
4077 if (e1000_desc_unused(adapter
->tx_ring
) < size
)
4081 netif_start_queue(netdev
);
4082 ++adapter
->restart_queue
;
4086 static int e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
4088 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4090 if (e1000_desc_unused(adapter
->tx_ring
) >= size
)
4092 return __e1000_maybe_stop_tx(netdev
, size
);
4095 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
4096 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
4097 struct net_device
*netdev
)
4099 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4100 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
4102 unsigned int max_per_txd
= E1000_MAX_PER_TXD
;
4103 unsigned int max_txd_pwr
= E1000_MAX_TXD_PWR
;
4104 unsigned int tx_flags
= 0;
4105 unsigned int len
= skb
->len
- skb
->data_len
;
4106 unsigned int nr_frags
;
4112 if (test_bit(__E1000_DOWN
, &adapter
->state
)) {
4113 dev_kfree_skb_any(skb
);
4114 return NETDEV_TX_OK
;
4117 if (skb
->len
<= 0) {
4118 dev_kfree_skb_any(skb
);
4119 return NETDEV_TX_OK
;
4122 mss
= skb_shinfo(skb
)->gso_size
;
4124 * The controller does a simple calculation to
4125 * make sure there is enough room in the FIFO before
4126 * initiating the DMA for each buffer. The calc is:
4127 * 4 = ceil(buffer len/mss). To make sure we don't
4128 * overrun the FIFO, adjust the max buffer len if mss
4133 max_per_txd
= min(mss
<< 2, max_per_txd
);
4134 max_txd_pwr
= fls(max_per_txd
) - 1;
4137 * TSO Workaround for 82571/2/3 Controllers -- if skb->data
4138 * points to just header, pull a few bytes of payload from
4139 * frags into skb->data
4141 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
4143 * we do this workaround for ES2LAN, but it is un-necessary,
4144 * avoiding it could save a lot of cycles
4146 if (skb
->data_len
&& (hdr_len
== len
)) {
4147 unsigned int pull_size
;
4149 pull_size
= min((unsigned int)4, skb
->data_len
);
4150 if (!__pskb_pull_tail(skb
, pull_size
)) {
4151 e_err("__pskb_pull_tail failed.\n");
4152 dev_kfree_skb_any(skb
);
4153 return NETDEV_TX_OK
;
4155 len
= skb
->len
- skb
->data_len
;
4159 /* reserve a descriptor for the offload context */
4160 if ((mss
) || (skb
->ip_summed
== CHECKSUM_PARTIAL
))
4164 count
+= TXD_USE_COUNT(len
, max_txd_pwr
);
4166 nr_frags
= skb_shinfo(skb
)->nr_frags
;
4167 for (f
= 0; f
< nr_frags
; f
++)
4168 count
+= TXD_USE_COUNT(skb_shinfo(skb
)->frags
[f
].size
,
4171 if (adapter
->hw
.mac
.tx_pkt_filtering
)
4172 e1000_transfer_dhcp_info(adapter
, skb
);
4175 * need: count + 2 desc gap to keep tail from touching
4176 * head, otherwise try next time
4178 if (e1000_maybe_stop_tx(netdev
, count
+ 2))
4179 return NETDEV_TX_BUSY
;
4181 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
4182 tx_flags
|= E1000_TX_FLAGS_VLAN
;
4183 tx_flags
|= (vlan_tx_tag_get(skb
) << E1000_TX_FLAGS_VLAN_SHIFT
);
4186 first
= tx_ring
->next_to_use
;
4188 tso
= e1000_tso(adapter
, skb
);
4190 dev_kfree_skb_any(skb
);
4191 return NETDEV_TX_OK
;
4195 tx_flags
|= E1000_TX_FLAGS_TSO
;
4196 else if (e1000_tx_csum(adapter
, skb
))
4197 tx_flags
|= E1000_TX_FLAGS_CSUM
;
4200 * Old method was to assume IPv4 packet by default if TSO was enabled.
4201 * 82571 hardware supports TSO capabilities for IPv6 as well...
4202 * no longer assume, we must.
4204 if (skb
->protocol
== htons(ETH_P_IP
))
4205 tx_flags
|= E1000_TX_FLAGS_IPV4
;
4207 /* if count is 0 then mapping error has occured */
4208 count
= e1000_tx_map(adapter
, skb
, first
, max_per_txd
, nr_frags
, mss
);
4210 e1000_tx_queue(adapter
, tx_flags
, count
);
4211 /* Make sure there is space in the ring for the next send. */
4212 e1000_maybe_stop_tx(netdev
, MAX_SKB_FRAGS
+ 2);
4215 dev_kfree_skb_any(skb
);
4216 tx_ring
->buffer_info
[first
].time_stamp
= 0;
4217 tx_ring
->next_to_use
= first
;
4220 return NETDEV_TX_OK
;
4224 * e1000_tx_timeout - Respond to a Tx Hang
4225 * @netdev: network interface device structure
4227 static void e1000_tx_timeout(struct net_device
*netdev
)
4229 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4231 /* Do the reset outside of interrupt context */
4232 adapter
->tx_timeout_count
++;
4233 schedule_work(&adapter
->reset_task
);
4236 static void e1000_reset_task(struct work_struct
*work
)
4238 struct e1000_adapter
*adapter
;
4239 adapter
= container_of(work
, struct e1000_adapter
, reset_task
);
4241 e1000e_reinit_locked(adapter
);
4245 * e1000_get_stats - Get System Network Statistics
4246 * @netdev: network interface device structure
4248 * Returns the address of the device statistics structure.
4249 * The statistics are actually updated from the timer callback.
4251 static struct net_device_stats
*e1000_get_stats(struct net_device
*netdev
)
4253 /* only return the current stats */
4254 return &netdev
->stats
;
4258 * e1000_change_mtu - Change the Maximum Transfer Unit
4259 * @netdev: network interface device structure
4260 * @new_mtu: new value for maximum frame size
4262 * Returns 0 on success, negative on failure
4264 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
)
4266 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4267 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
4269 /* Jumbo frame support */
4270 if ((max_frame
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) &&
4271 !(adapter
->flags
& FLAG_HAS_JUMBO_FRAMES
)) {
4272 e_err("Jumbo Frames not supported.\n");
4276 /* Supported frame sizes */
4277 if ((new_mtu
< ETH_ZLEN
+ ETH_FCS_LEN
+ VLAN_HLEN
) ||
4278 (max_frame
> adapter
->max_hw_frame_size
)) {
4279 e_err("Unsupported MTU setting\n");
4283 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->state
))
4285 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
4286 adapter
->max_frame_size
= max_frame
;
4287 e_info("changing MTU from %d to %d\n", netdev
->mtu
, new_mtu
);
4288 netdev
->mtu
= new_mtu
;
4289 if (netif_running(netdev
))
4290 e1000e_down(adapter
);
4293 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
4294 * means we reserve 2 more, this pushes us to allocate from the next
4296 * i.e. RXBUFFER_2048 --> size-4096 slab
4297 * However with the new *_jumbo_rx* routines, jumbo receives will use
4301 if (max_frame
<= 2048)
4302 adapter
->rx_buffer_len
= 2048;
4304 adapter
->rx_buffer_len
= 4096;
4306 /* adjust allocation if LPE protects us, and we aren't using SBP */
4307 if ((max_frame
== ETH_FRAME_LEN
+ ETH_FCS_LEN
) ||
4308 (max_frame
== ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
))
4309 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
4312 if (netif_running(netdev
))
4315 e1000e_reset(adapter
);
4317 clear_bit(__E1000_RESETTING
, &adapter
->state
);
4322 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
4325 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4326 struct mii_ioctl_data
*data
= if_mii(ifr
);
4328 if (adapter
->hw
.phy
.media_type
!= e1000_media_type_copper
)
4333 data
->phy_id
= adapter
->hw
.phy
.addr
;
4336 e1000_phy_read_status(adapter
);
4338 switch (data
->reg_num
& 0x1F) {
4340 data
->val_out
= adapter
->phy_regs
.bmcr
;
4343 data
->val_out
= adapter
->phy_regs
.bmsr
;
4346 data
->val_out
= (adapter
->hw
.phy
.id
>> 16);
4349 data
->val_out
= (adapter
->hw
.phy
.id
& 0xFFFF);
4352 data
->val_out
= adapter
->phy_regs
.advertise
;
4355 data
->val_out
= adapter
->phy_regs
.lpa
;
4358 data
->val_out
= adapter
->phy_regs
.expansion
;
4361 data
->val_out
= adapter
->phy_regs
.ctrl1000
;
4364 data
->val_out
= adapter
->phy_regs
.stat1000
;
4367 data
->val_out
= adapter
->phy_regs
.estatus
;
4380 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4386 return e1000_mii_ioctl(netdev
, ifr
, cmd
);
4392 static int e1000_init_phy_wakeup(struct e1000_adapter
*adapter
, u32 wufc
)
4394 struct e1000_hw
*hw
= &adapter
->hw
;
4399 /* copy MAC RARs to PHY RARs */
4400 for (i
= 0; i
< adapter
->hw
.mac
.rar_entry_count
; i
++) {
4401 mac_reg
= er32(RAL(i
));
4402 e1e_wphy(hw
, BM_RAR_L(i
), (u16
)(mac_reg
& 0xFFFF));
4403 e1e_wphy(hw
, BM_RAR_M(i
), (u16
)((mac_reg
>> 16) & 0xFFFF));
4404 mac_reg
= er32(RAH(i
));
4405 e1e_wphy(hw
, BM_RAR_H(i
), (u16
)(mac_reg
& 0xFFFF));
4406 e1e_wphy(hw
, BM_RAR_CTRL(i
), (u16
)((mac_reg
>> 16) & 0xFFFF));
4409 /* copy MAC MTA to PHY MTA */
4410 for (i
= 0; i
< adapter
->hw
.mac
.mta_reg_count
; i
++) {
4411 mac_reg
= E1000_READ_REG_ARRAY(hw
, E1000_MTA
, i
);
4412 e1e_wphy(hw
, BM_MTA(i
), (u16
)(mac_reg
& 0xFFFF));
4413 e1e_wphy(hw
, BM_MTA(i
) + 1, (u16
)((mac_reg
>> 16) & 0xFFFF));
4416 /* configure PHY Rx Control register */
4417 e1e_rphy(&adapter
->hw
, BM_RCTL
, &phy_reg
);
4418 mac_reg
= er32(RCTL
);
4419 if (mac_reg
& E1000_RCTL_UPE
)
4420 phy_reg
|= BM_RCTL_UPE
;
4421 if (mac_reg
& E1000_RCTL_MPE
)
4422 phy_reg
|= BM_RCTL_MPE
;
4423 phy_reg
&= ~(BM_RCTL_MO_MASK
);
4424 if (mac_reg
& E1000_RCTL_MO_3
)
4425 phy_reg
|= (((mac_reg
& E1000_RCTL_MO_3
) >> E1000_RCTL_MO_SHIFT
)
4426 << BM_RCTL_MO_SHIFT
);
4427 if (mac_reg
& E1000_RCTL_BAM
)
4428 phy_reg
|= BM_RCTL_BAM
;
4429 if (mac_reg
& E1000_RCTL_PMCF
)
4430 phy_reg
|= BM_RCTL_PMCF
;
4431 mac_reg
= er32(CTRL
);
4432 if (mac_reg
& E1000_CTRL_RFCE
)
4433 phy_reg
|= BM_RCTL_RFCE
;
4434 e1e_wphy(&adapter
->hw
, BM_RCTL
, phy_reg
);
4436 /* enable PHY wakeup in MAC register */
4438 ew32(WUC
, E1000_WUC_PHY_WAKE
| E1000_WUC_PME_EN
);
4440 /* configure and enable PHY wakeup in PHY registers */
4441 e1e_wphy(&adapter
->hw
, BM_WUFC
, wufc
);
4442 e1e_wphy(&adapter
->hw
, BM_WUC
, E1000_WUC_PME_EN
);
4444 /* activate PHY wakeup */
4445 retval
= hw
->phy
.ops
.acquire(hw
);
4447 e_err("Could not acquire PHY\n");
4450 e1000e_write_phy_reg_mdic(hw
, IGP01E1000_PHY_PAGE_SELECT
,
4451 (BM_WUC_ENABLE_PAGE
<< IGP_PAGE_SHIFT
));
4452 retval
= e1000e_read_phy_reg_mdic(hw
, BM_WUC_ENABLE_REG
, &phy_reg
);
4454 e_err("Could not read PHY page 769\n");
4457 phy_reg
|= BM_WUC_ENABLE_BIT
| BM_WUC_HOST_WU_BIT
;
4458 retval
= e1000e_write_phy_reg_mdic(hw
, BM_WUC_ENABLE_REG
, phy_reg
);
4460 e_err("Could not set PHY Host Wakeup bit\n");
4462 hw
->phy
.ops
.release(hw
);
4467 static int __e1000_shutdown(struct pci_dev
*pdev
, bool *enable_wake
)
4469 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4470 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4471 struct e1000_hw
*hw
= &adapter
->hw
;
4472 u32 ctrl
, ctrl_ext
, rctl
, status
;
4473 u32 wufc
= adapter
->wol
;
4476 netif_device_detach(netdev
);
4478 if (netif_running(netdev
)) {
4479 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->state
));
4480 e1000e_down(adapter
);
4481 e1000_free_irq(adapter
);
4483 e1000e_reset_interrupt_capability(adapter
);
4485 retval
= pci_save_state(pdev
);
4489 status
= er32(STATUS
);
4490 if (status
& E1000_STATUS_LU
)
4491 wufc
&= ~E1000_WUFC_LNKC
;
4494 e1000_setup_rctl(adapter
);
4495 e1000_set_multi(netdev
);
4497 /* turn on all-multi mode if wake on multicast is enabled */
4498 if (wufc
& E1000_WUFC_MC
) {
4500 rctl
|= E1000_RCTL_MPE
;
4505 /* advertise wake from D3Cold */
4506 #define E1000_CTRL_ADVD3WUC 0x00100000
4507 /* phy power management enable */
4508 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4509 ctrl
|= E1000_CTRL_ADVD3WUC
;
4510 if (!(adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
))
4511 ctrl
|= E1000_CTRL_EN_PHY_PWR_MGMT
;
4514 if (adapter
->hw
.phy
.media_type
== e1000_media_type_fiber
||
4515 adapter
->hw
.phy
.media_type
==
4516 e1000_media_type_internal_serdes
) {
4517 /* keep the laser running in D3 */
4518 ctrl_ext
= er32(CTRL_EXT
);
4519 ctrl_ext
|= E1000_CTRL_EXT_SDP3_DATA
;
4520 ew32(CTRL_EXT
, ctrl_ext
);
4523 if (adapter
->flags
& FLAG_IS_ICH
)
4524 e1000e_disable_gig_wol_ich8lan(&adapter
->hw
);
4526 /* Allow time for pending master requests to run */
4527 e1000e_disable_pcie_master(&adapter
->hw
);
4529 if (adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
) {
4530 /* enable wakeup by the PHY */
4531 retval
= e1000_init_phy_wakeup(adapter
, wufc
);
4535 /* enable wakeup by the MAC */
4537 ew32(WUC
, E1000_WUC_PME_EN
);
4544 *enable_wake
= !!wufc
;
4546 /* make sure adapter isn't asleep if manageability is enabled */
4547 if ((adapter
->flags
& FLAG_MNG_PT_ENABLED
) ||
4548 (hw
->mac
.ops
.check_mng_mode(hw
)))
4549 *enable_wake
= true;
4551 if (adapter
->hw
.phy
.type
== e1000_phy_igp_3
)
4552 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter
->hw
);
4555 * Release control of h/w to f/w. If f/w is AMT enabled, this
4556 * would have already happened in close and is redundant.
4558 e1000_release_hw_control(adapter
);
4560 pci_disable_device(pdev
);
4565 static void e1000_power_off(struct pci_dev
*pdev
, bool sleep
, bool wake
)
4567 if (sleep
&& wake
) {
4568 pci_prepare_to_sleep(pdev
);
4572 pci_wake_from_d3(pdev
, wake
);
4573 pci_set_power_state(pdev
, PCI_D3hot
);
4576 static void e1000_complete_shutdown(struct pci_dev
*pdev
, bool sleep
,
4579 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4580 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4583 * The pci-e switch on some quad port adapters will report a
4584 * correctable error when the MAC transitions from D0 to D3. To
4585 * prevent this we need to mask off the correctable errors on the
4586 * downstream port of the pci-e switch.
4588 if (adapter
->flags
& FLAG_IS_QUAD_PORT
) {
4589 struct pci_dev
*us_dev
= pdev
->bus
->self
;
4590 int pos
= pci_find_capability(us_dev
, PCI_CAP_ID_EXP
);
4593 pci_read_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
, &devctl
);
4594 pci_write_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
,
4595 (devctl
& ~PCI_EXP_DEVCTL_CERE
));
4597 e1000_power_off(pdev
, sleep
, wake
);
4599 pci_write_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
, devctl
);
4601 e1000_power_off(pdev
, sleep
, wake
);
4605 static void e1000e_disable_l1aspm(struct pci_dev
*pdev
)
4611 * 82573 workaround - disable L1 ASPM on mobile chipsets
4613 * L1 ASPM on various mobile (ich7) chipsets do not behave properly
4614 * resulting in lost data or garbage information on the pci-e link
4615 * level. This could result in (false) bad EEPROM checksum errors,
4616 * long ping times (up to 2s) or even a system freeze/hang.
4618 * Unfortunately this feature saves about 1W power consumption when
4621 pos
= pci_find_capability(pdev
, PCI_CAP_ID_EXP
);
4622 pci_read_config_word(pdev
, pos
+ PCI_EXP_LNKCTL
, &val
);
4624 dev_warn(&pdev
->dev
, "Disabling L1 ASPM\n");
4626 pci_write_config_word(pdev
, pos
+ PCI_EXP_LNKCTL
, val
);
4631 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4636 retval
= __e1000_shutdown(pdev
, &wake
);
4638 e1000_complete_shutdown(pdev
, true, wake
);
4643 static int e1000_resume(struct pci_dev
*pdev
)
4645 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4646 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4647 struct e1000_hw
*hw
= &adapter
->hw
;
4650 pci_set_power_state(pdev
, PCI_D0
);
4651 pci_restore_state(pdev
);
4652 pci_save_state(pdev
);
4653 e1000e_disable_l1aspm(pdev
);
4655 err
= pci_enable_device_mem(pdev
);
4658 "Cannot enable PCI device from suspend\n");
4662 pci_set_master(pdev
);
4664 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4665 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4667 e1000e_set_interrupt_capability(adapter
);
4668 if (netif_running(netdev
)) {
4669 err
= e1000_request_irq(adapter
);
4674 e1000e_power_up_phy(adapter
);
4676 /* report the system wakeup cause from S3/S4 */
4677 if (adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
) {
4680 e1e_rphy(&adapter
->hw
, BM_WUS
, &phy_data
);
4682 e_info("PHY Wakeup cause - %s\n",
4683 phy_data
& E1000_WUS_EX
? "Unicast Packet" :
4684 phy_data
& E1000_WUS_MC
? "Multicast Packet" :
4685 phy_data
& E1000_WUS_BC
? "Broadcast Packet" :
4686 phy_data
& E1000_WUS_MAG
? "Magic Packet" :
4687 phy_data
& E1000_WUS_LNKC
? "Link Status "
4688 " Change" : "other");
4690 e1e_wphy(&adapter
->hw
, BM_WUS
, ~0);
4692 u32 wus
= er32(WUS
);
4694 e_info("MAC Wakeup cause - %s\n",
4695 wus
& E1000_WUS_EX
? "Unicast Packet" :
4696 wus
& E1000_WUS_MC
? "Multicast Packet" :
4697 wus
& E1000_WUS_BC
? "Broadcast Packet" :
4698 wus
& E1000_WUS_MAG
? "Magic Packet" :
4699 wus
& E1000_WUS_LNKC
? "Link Status Change" :
4705 e1000e_reset(adapter
);
4707 e1000_init_manageability(adapter
);
4709 if (netif_running(netdev
))
4712 netif_device_attach(netdev
);
4715 * If the controller has AMT, do not set DRV_LOAD until the interface
4716 * is up. For all other cases, let the f/w know that the h/w is now
4717 * under the control of the driver.
4719 if (!(adapter
->flags
& FLAG_HAS_AMT
))
4720 e1000_get_hw_control(adapter
);
4726 static void e1000_shutdown(struct pci_dev
*pdev
)
4730 __e1000_shutdown(pdev
, &wake
);
4732 if (system_state
== SYSTEM_POWER_OFF
)
4733 e1000_complete_shutdown(pdev
, false, wake
);
4736 #ifdef CONFIG_NET_POLL_CONTROLLER
4738 * Polling 'interrupt' - used by things like netconsole to send skbs
4739 * without having to re-enable interrupts. It's not called while
4740 * the interrupt routine is executing.
4742 static void e1000_netpoll(struct net_device
*netdev
)
4744 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4746 disable_irq(adapter
->pdev
->irq
);
4747 e1000_intr(adapter
->pdev
->irq
, netdev
);
4749 enable_irq(adapter
->pdev
->irq
);
4754 * e1000_io_error_detected - called when PCI error is detected
4755 * @pdev: Pointer to PCI device
4756 * @state: The current pci connection state
4758 * This function is called after a PCI bus error affecting
4759 * this device has been detected.
4761 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
4762 pci_channel_state_t state
)
4764 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4765 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4767 netif_device_detach(netdev
);
4769 if (state
== pci_channel_io_perm_failure
)
4770 return PCI_ERS_RESULT_DISCONNECT
;
4772 if (netif_running(netdev
))
4773 e1000e_down(adapter
);
4774 pci_disable_device(pdev
);
4776 /* Request a slot slot reset. */
4777 return PCI_ERS_RESULT_NEED_RESET
;
4781 * e1000_io_slot_reset - called after the pci bus has been reset.
4782 * @pdev: Pointer to PCI device
4784 * Restart the card from scratch, as if from a cold-boot. Implementation
4785 * resembles the first-half of the e1000_resume routine.
4787 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
)
4789 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4790 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4791 struct e1000_hw
*hw
= &adapter
->hw
;
4793 pci_ers_result_t result
;
4795 e1000e_disable_l1aspm(pdev
);
4796 err
= pci_enable_device_mem(pdev
);
4799 "Cannot re-enable PCI device after reset.\n");
4800 result
= PCI_ERS_RESULT_DISCONNECT
;
4802 pci_set_master(pdev
);
4803 pci_restore_state(pdev
);
4804 pci_save_state(pdev
);
4806 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4807 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4809 e1000e_reset(adapter
);
4811 result
= PCI_ERS_RESULT_RECOVERED
;
4814 pci_cleanup_aer_uncorrect_error_status(pdev
);
4820 * e1000_io_resume - called when traffic can start flowing again.
4821 * @pdev: Pointer to PCI device
4823 * This callback is called when the error recovery driver tells us that
4824 * its OK to resume normal operation. Implementation resembles the
4825 * second-half of the e1000_resume routine.
4827 static void e1000_io_resume(struct pci_dev
*pdev
)
4829 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4830 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4832 e1000_init_manageability(adapter
);
4834 if (netif_running(netdev
)) {
4835 if (e1000e_up(adapter
)) {
4837 "can't bring device back up after reset\n");
4842 netif_device_attach(netdev
);
4845 * If the controller has AMT, do not set DRV_LOAD until the interface
4846 * is up. For all other cases, let the f/w know that the h/w is now
4847 * under the control of the driver.
4849 if (!(adapter
->flags
& FLAG_HAS_AMT
))
4850 e1000_get_hw_control(adapter
);
4854 static void e1000_print_device_info(struct e1000_adapter
*adapter
)
4856 struct e1000_hw
*hw
= &adapter
->hw
;
4857 struct net_device
*netdev
= adapter
->netdev
;
4860 /* print bus type/speed/width info */
4861 e_info("(PCI Express:2.5GB/s:%s) %pM\n",
4863 ((hw
->bus
.width
== e1000_bus_width_pcie_x4
) ? "Width x4" :
4867 e_info("Intel(R) PRO/%s Network Connection\n",
4868 (hw
->phy
.type
== e1000_phy_ife
) ? "10/100" : "1000");
4869 e1000e_read_pba_num(hw
, &pba_num
);
4870 e_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
4871 hw
->mac
.type
, hw
->phy
.type
, (pba_num
>> 8), (pba_num
& 0xff));
4874 static void e1000_eeprom_checks(struct e1000_adapter
*adapter
)
4876 struct e1000_hw
*hw
= &adapter
->hw
;
4880 if (hw
->mac
.type
!= e1000_82573
)
4883 ret_val
= e1000_read_nvm(hw
, NVM_INIT_CONTROL2_REG
, 1, &buf
);
4884 if (!ret_val
&& (!(le16_to_cpu(buf
) & (1 << 0)))) {
4885 /* Deep Smart Power Down (DSPD) */
4886 dev_warn(&adapter
->pdev
->dev
,
4887 "Warning: detected DSPD enabled in EEPROM\n");
4890 ret_val
= e1000_read_nvm(hw
, NVM_INIT_3GIO_3
, 1, &buf
);
4891 if (!ret_val
&& (le16_to_cpu(buf
) & (3 << 2))) {
4893 dev_warn(&adapter
->pdev
->dev
,
4894 "Warning: detected ASPM enabled in EEPROM\n");
4898 static const struct net_device_ops e1000e_netdev_ops
= {
4899 .ndo_open
= e1000_open
,
4900 .ndo_stop
= e1000_close
,
4901 .ndo_start_xmit
= e1000_xmit_frame
,
4902 .ndo_get_stats
= e1000_get_stats
,
4903 .ndo_set_multicast_list
= e1000_set_multi
,
4904 .ndo_set_mac_address
= e1000_set_mac
,
4905 .ndo_change_mtu
= e1000_change_mtu
,
4906 .ndo_do_ioctl
= e1000_ioctl
,
4907 .ndo_tx_timeout
= e1000_tx_timeout
,
4908 .ndo_validate_addr
= eth_validate_addr
,
4910 .ndo_vlan_rx_register
= e1000_vlan_rx_register
,
4911 .ndo_vlan_rx_add_vid
= e1000_vlan_rx_add_vid
,
4912 .ndo_vlan_rx_kill_vid
= e1000_vlan_rx_kill_vid
,
4913 #ifdef CONFIG_NET_POLL_CONTROLLER
4914 .ndo_poll_controller
= e1000_netpoll
,
4919 * e1000_probe - Device Initialization Routine
4920 * @pdev: PCI device information struct
4921 * @ent: entry in e1000_pci_tbl
4923 * Returns 0 on success, negative on failure
4925 * e1000_probe initializes an adapter identified by a pci_dev structure.
4926 * The OS initialization, configuring of the adapter private structure,
4927 * and a hardware reset occur.
4929 static int __devinit
e1000_probe(struct pci_dev
*pdev
,
4930 const struct pci_device_id
*ent
)
4932 struct net_device
*netdev
;
4933 struct e1000_adapter
*adapter
;
4934 struct e1000_hw
*hw
;
4935 const struct e1000_info
*ei
= e1000_info_tbl
[ent
->driver_data
];
4936 resource_size_t mmio_start
, mmio_len
;
4937 resource_size_t flash_start
, flash_len
;
4939 static int cards_found
;
4940 int i
, err
, pci_using_dac
;
4941 u16 eeprom_data
= 0;
4942 u16 eeprom_apme_mask
= E1000_EEPROM_APME
;
4944 e1000e_disable_l1aspm(pdev
);
4946 err
= pci_enable_device_mem(pdev
);
4951 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(64));
4953 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
4957 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
4959 err
= pci_set_consistent_dma_mask(pdev
,
4962 dev_err(&pdev
->dev
, "No usable DMA "
4963 "configuration, aborting\n");
4969 err
= pci_request_selected_regions_exclusive(pdev
,
4970 pci_select_bars(pdev
, IORESOURCE_MEM
),
4971 e1000e_driver_name
);
4975 /* AER (Advanced Error Reporting) hooks */
4976 pci_enable_pcie_error_reporting(pdev
);
4978 pci_set_master(pdev
);
4979 /* PCI config space info */
4980 err
= pci_save_state(pdev
);
4982 goto err_alloc_etherdev
;
4985 netdev
= alloc_etherdev(sizeof(struct e1000_adapter
));
4987 goto err_alloc_etherdev
;
4989 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
4991 pci_set_drvdata(pdev
, netdev
);
4992 adapter
= netdev_priv(netdev
);
4994 adapter
->netdev
= netdev
;
4995 adapter
->pdev
= pdev
;
4997 adapter
->pba
= ei
->pba
;
4998 adapter
->flags
= ei
->flags
;
4999 adapter
->flags2
= ei
->flags2
;
5000 adapter
->hw
.adapter
= adapter
;
5001 adapter
->hw
.mac
.type
= ei
->mac
;
5002 adapter
->max_hw_frame_size
= ei
->max_hw_frame_size
;
5003 adapter
->msg_enable
= (1 << NETIF_MSG_DRV
| NETIF_MSG_PROBE
) - 1;
5005 mmio_start
= pci_resource_start(pdev
, 0);
5006 mmio_len
= pci_resource_len(pdev
, 0);
5009 adapter
->hw
.hw_addr
= ioremap(mmio_start
, mmio_len
);
5010 if (!adapter
->hw
.hw_addr
)
5013 if ((adapter
->flags
& FLAG_HAS_FLASH
) &&
5014 (pci_resource_flags(pdev
, 1) & IORESOURCE_MEM
)) {
5015 flash_start
= pci_resource_start(pdev
, 1);
5016 flash_len
= pci_resource_len(pdev
, 1);
5017 adapter
->hw
.flash_address
= ioremap(flash_start
, flash_len
);
5018 if (!adapter
->hw
.flash_address
)
5022 /* construct the net_device struct */
5023 netdev
->netdev_ops
= &e1000e_netdev_ops
;
5024 e1000e_set_ethtool_ops(netdev
);
5025 netdev
->watchdog_timeo
= 5 * HZ
;
5026 netif_napi_add(netdev
, &adapter
->napi
, e1000_clean
, 64);
5027 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
5029 netdev
->mem_start
= mmio_start
;
5030 netdev
->mem_end
= mmio_start
+ mmio_len
;
5032 adapter
->bd_number
= cards_found
++;
5034 e1000e_check_options(adapter
);
5036 /* setup adapter struct */
5037 err
= e1000_sw_init(adapter
);
5043 memcpy(&hw
->mac
.ops
, ei
->mac_ops
, sizeof(hw
->mac
.ops
));
5044 memcpy(&hw
->nvm
.ops
, ei
->nvm_ops
, sizeof(hw
->nvm
.ops
));
5045 memcpy(&hw
->phy
.ops
, ei
->phy_ops
, sizeof(hw
->phy
.ops
));
5047 err
= ei
->get_variants(adapter
);
5051 if ((adapter
->flags
& FLAG_IS_ICH
) &&
5052 (adapter
->flags
& FLAG_READ_ONLY_NVM
))
5053 e1000e_write_protect_nvm_ich8lan(&adapter
->hw
);
5055 hw
->mac
.ops
.get_bus_info(&adapter
->hw
);
5057 adapter
->hw
.phy
.autoneg_wait_to_complete
= 0;
5059 /* Copper options */
5060 if (adapter
->hw
.phy
.media_type
== e1000_media_type_copper
) {
5061 adapter
->hw
.phy
.mdix
= AUTO_ALL_MODES
;
5062 adapter
->hw
.phy
.disable_polarity_correction
= 0;
5063 adapter
->hw
.phy
.ms_type
= e1000_ms_hw_default
;
5066 if (e1000_check_reset_block(&adapter
->hw
))
5067 e_info("PHY reset is blocked due to SOL/IDER session.\n");
5069 netdev
->features
= NETIF_F_SG
|
5071 NETIF_F_HW_VLAN_TX
|
5074 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
)
5075 netdev
->features
|= NETIF_F_HW_VLAN_FILTER
;
5077 netdev
->features
|= NETIF_F_TSO
;
5078 netdev
->features
|= NETIF_F_TSO6
;
5080 netdev
->vlan_features
|= NETIF_F_TSO
;
5081 netdev
->vlan_features
|= NETIF_F_TSO6
;
5082 netdev
->vlan_features
|= NETIF_F_HW_CSUM
;
5083 netdev
->vlan_features
|= NETIF_F_SG
;
5086 netdev
->features
|= NETIF_F_HIGHDMA
;
5088 if (e1000e_enable_mng_pass_thru(&adapter
->hw
))
5089 adapter
->flags
|= FLAG_MNG_PT_ENABLED
;
5092 * before reading the NVM, reset the controller to
5093 * put the device in a known good starting state
5095 adapter
->hw
.mac
.ops
.reset_hw(&adapter
->hw
);
5098 * systems with ASPM and others may see the checksum fail on the first
5099 * attempt. Let's give it a few tries
5102 if (e1000_validate_nvm_checksum(&adapter
->hw
) >= 0)
5105 e_err("The NVM Checksum Is Not Valid\n");
5111 e1000_eeprom_checks(adapter
);
5113 /* copy the MAC address */
5114 if (e1000e_read_mac_addr(&adapter
->hw
))
5115 e_err("NVM Read Error while reading MAC address\n");
5117 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
5118 memcpy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
5120 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
5121 e_err("Invalid MAC Address: %pM\n", netdev
->perm_addr
);
5126 init_timer(&adapter
->watchdog_timer
);
5127 adapter
->watchdog_timer
.function
= &e1000_watchdog
;
5128 adapter
->watchdog_timer
.data
= (unsigned long) adapter
;
5130 init_timer(&adapter
->phy_info_timer
);
5131 adapter
->phy_info_timer
.function
= &e1000_update_phy_info
;
5132 adapter
->phy_info_timer
.data
= (unsigned long) adapter
;
5134 INIT_WORK(&adapter
->reset_task
, e1000_reset_task
);
5135 INIT_WORK(&adapter
->watchdog_task
, e1000_watchdog_task
);
5136 INIT_WORK(&adapter
->downshift_task
, e1000e_downshift_workaround
);
5137 INIT_WORK(&adapter
->update_phy_task
, e1000e_update_phy_task
);
5138 INIT_WORK(&adapter
->print_hang_task
, e1000_print_hw_hang
);
5140 /* Initialize link parameters. User can change them with ethtool */
5141 adapter
->hw
.mac
.autoneg
= 1;
5142 adapter
->fc_autoneg
= 1;
5143 adapter
->hw
.fc
.requested_mode
= e1000_fc_default
;
5144 adapter
->hw
.fc
.current_mode
= e1000_fc_default
;
5145 adapter
->hw
.phy
.autoneg_advertised
= 0x2f;
5147 /* ring size defaults */
5148 adapter
->rx_ring
->count
= 256;
5149 adapter
->tx_ring
->count
= 256;
5152 * Initial Wake on LAN setting - If APM wake is enabled in
5153 * the EEPROM, enable the ACPI Magic Packet filter
5155 if (adapter
->flags
& FLAG_APME_IN_WUC
) {
5156 /* APME bit in EEPROM is mapped to WUC.APME */
5157 eeprom_data
= er32(WUC
);
5158 eeprom_apme_mask
= E1000_WUC_APME
;
5159 if (eeprom_data
& E1000_WUC_PHY_WAKE
)
5160 adapter
->flags2
|= FLAG2_HAS_PHY_WAKEUP
;
5161 } else if (adapter
->flags
& FLAG_APME_IN_CTRL3
) {
5162 if (adapter
->flags
& FLAG_APME_CHECK_PORT_B
&&
5163 (adapter
->hw
.bus
.func
== 1))
5164 e1000_read_nvm(&adapter
->hw
,
5165 NVM_INIT_CONTROL3_PORT_B
, 1, &eeprom_data
);
5167 e1000_read_nvm(&adapter
->hw
,
5168 NVM_INIT_CONTROL3_PORT_A
, 1, &eeprom_data
);
5171 /* fetch WoL from EEPROM */
5172 if (eeprom_data
& eeprom_apme_mask
)
5173 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
5176 * now that we have the eeprom settings, apply the special cases
5177 * where the eeprom may be wrong or the board simply won't support
5178 * wake on lan on a particular port
5180 if (!(adapter
->flags
& FLAG_HAS_WOL
))
5181 adapter
->eeprom_wol
= 0;
5183 /* initialize the wol settings based on the eeprom settings */
5184 adapter
->wol
= adapter
->eeprom_wol
;
5185 device_set_wakeup_enable(&adapter
->pdev
->dev
, adapter
->wol
);
5187 /* save off EEPROM version number */
5188 e1000_read_nvm(&adapter
->hw
, 5, 1, &adapter
->eeprom_vers
);
5190 /* reset the hardware with the new settings */
5191 e1000e_reset(adapter
);
5194 * If the controller has AMT, do not set DRV_LOAD until the interface
5195 * is up. For all other cases, let the f/w know that the h/w is now
5196 * under the control of the driver.
5198 if (!(adapter
->flags
& FLAG_HAS_AMT
))
5199 e1000_get_hw_control(adapter
);
5201 strcpy(netdev
->name
, "eth%d");
5202 err
= register_netdev(netdev
);
5206 /* carrier off reporting is important to ethtool even BEFORE open */
5207 netif_carrier_off(netdev
);
5209 e1000_print_device_info(adapter
);
5214 if (!(adapter
->flags
& FLAG_HAS_AMT
))
5215 e1000_release_hw_control(adapter
);
5217 if (!e1000_check_reset_block(&adapter
->hw
))
5218 e1000_phy_hw_reset(&adapter
->hw
);
5221 kfree(adapter
->tx_ring
);
5222 kfree(adapter
->rx_ring
);
5224 if (adapter
->hw
.flash_address
)
5225 iounmap(adapter
->hw
.flash_address
);
5226 e1000e_reset_interrupt_capability(adapter
);
5228 iounmap(adapter
->hw
.hw_addr
);
5230 free_netdev(netdev
);
5232 pci_release_selected_regions(pdev
,
5233 pci_select_bars(pdev
, IORESOURCE_MEM
));
5236 pci_disable_device(pdev
);
5241 * e1000_remove - Device Removal Routine
5242 * @pdev: PCI device information struct
5244 * e1000_remove is called by the PCI subsystem to alert the driver
5245 * that it should release a PCI device. The could be caused by a
5246 * Hot-Plug event, or because the driver is going to be removed from
5249 static void __devexit
e1000_remove(struct pci_dev
*pdev
)
5251 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5252 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5255 * flush_scheduled work may reschedule our watchdog task, so
5256 * explicitly disable watchdog tasks from being rescheduled
5258 set_bit(__E1000_DOWN
, &adapter
->state
);
5259 del_timer_sync(&adapter
->watchdog_timer
);
5260 del_timer_sync(&adapter
->phy_info_timer
);
5262 cancel_work_sync(&adapter
->reset_task
);
5263 cancel_work_sync(&adapter
->watchdog_task
);
5264 cancel_work_sync(&adapter
->downshift_task
);
5265 cancel_work_sync(&adapter
->update_phy_task
);
5266 cancel_work_sync(&adapter
->print_hang_task
);
5267 flush_scheduled_work();
5269 if (!(netdev
->flags
& IFF_UP
))
5270 e1000_power_down_phy(adapter
);
5272 unregister_netdev(netdev
);
5275 * Release control of h/w to f/w. If f/w is AMT enabled, this
5276 * would have already happened in close and is redundant.
5278 e1000_release_hw_control(adapter
);
5280 e1000e_reset_interrupt_capability(adapter
);
5281 kfree(adapter
->tx_ring
);
5282 kfree(adapter
->rx_ring
);
5284 iounmap(adapter
->hw
.hw_addr
);
5285 if (adapter
->hw
.flash_address
)
5286 iounmap(adapter
->hw
.flash_address
);
5287 pci_release_selected_regions(pdev
,
5288 pci_select_bars(pdev
, IORESOURCE_MEM
));
5290 free_netdev(netdev
);
5293 pci_disable_pcie_error_reporting(pdev
);
5295 pci_disable_device(pdev
);
5298 /* PCI Error Recovery (ERS) */
5299 static struct pci_error_handlers e1000_err_handler
= {
5300 .error_detected
= e1000_io_error_detected
,
5301 .slot_reset
= e1000_io_slot_reset
,
5302 .resume
= e1000_io_resume
,
5305 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl
) = {
5306 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_COPPER
), board_82571
},
5307 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_FIBER
), board_82571
},
5308 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_QUAD_COPPER
), board_82571
},
5309 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_QUAD_COPPER_LP
), board_82571
},
5310 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_QUAD_FIBER
), board_82571
},
5311 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_SERDES
), board_82571
},
5312 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_SERDES_DUAL
), board_82571
},
5313 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571EB_SERDES_QUAD
), board_82571
},
5314 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82571PT_QUAD_COPPER
), board_82571
},
5316 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI
), board_82572
},
5317 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI_COPPER
), board_82572
},
5318 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI_FIBER
), board_82572
},
5319 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82572EI_SERDES
), board_82572
},
5321 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82573E
), board_82573
},
5322 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82573E_IAMT
), board_82573
},
5323 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82573L
), board_82573
},
5325 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82574L
), board_82574
},
5326 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82574LA
), board_82574
},
5327 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82583V
), board_82583
},
5329 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_COPPER_DPT
),
5330 board_80003es2lan
},
5331 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_COPPER_SPT
),
5332 board_80003es2lan
},
5333 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_SERDES_DPT
),
5334 board_80003es2lan
},
5335 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_80003ES2LAN_SERDES_SPT
),
5336 board_80003es2lan
},
5338 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IFE
), board_ich8lan
},
5339 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IFE_G
), board_ich8lan
},
5340 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IFE_GT
), board_ich8lan
},
5341 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_AMT
), board_ich8lan
},
5342 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_C
), board_ich8lan
},
5343 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_M
), board_ich8lan
},
5344 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_IGP_M_AMT
), board_ich8lan
},
5345 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH8_82567V_3
), board_ich8lan
},
5347 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IFE
), board_ich9lan
},
5348 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IFE_G
), board_ich9lan
},
5349 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IFE_GT
), board_ich9lan
},
5350 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_AMT
), board_ich9lan
},
5351 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_C
), board_ich9lan
},
5352 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_BM
), board_ich9lan
},
5353 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_M
), board_ich9lan
},
5354 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_M_AMT
), board_ich9lan
},
5355 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH9_IGP_M_V
), board_ich9lan
},
5357 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_R_BM_LM
), board_ich9lan
},
5358 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_R_BM_LF
), board_ich9lan
},
5359 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_R_BM_V
), board_ich9lan
},
5361 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_D_BM_LM
), board_ich10lan
},
5362 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_ICH10_D_BM_LF
), board_ich10lan
},
5364 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_M_HV_LM
), board_pchlan
},
5365 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_M_HV_LC
), board_pchlan
},
5366 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_D_HV_DM
), board_pchlan
},
5367 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_PCH_D_HV_DC
), board_pchlan
},
5369 { } /* terminate list */
5371 MODULE_DEVICE_TABLE(pci
, e1000_pci_tbl
);
5373 /* PCI Device API Driver */
5374 static struct pci_driver e1000_driver
= {
5375 .name
= e1000e_driver_name
,
5376 .id_table
= e1000_pci_tbl
,
5377 .probe
= e1000_probe
,
5378 .remove
= __devexit_p(e1000_remove
),
5380 /* Power Management Hooks */
5381 .suspend
= e1000_suspend
,
5382 .resume
= e1000_resume
,
5384 .shutdown
= e1000_shutdown
,
5385 .err_handler
= &e1000_err_handler
5389 * e1000_init_module - Driver Registration Routine
5391 * e1000_init_module is the first routine called when the driver is
5392 * loaded. All it does is register with the PCI subsystem.
5394 static int __init
e1000_init_module(void)
5397 printk(KERN_INFO
"%s: Intel(R) PRO/1000 Network Driver - %s\n",
5398 e1000e_driver_name
, e1000e_driver_version
);
5399 printk(KERN_INFO
"%s: Copyright (c) 1999 - 2009 Intel Corporation.\n",
5400 e1000e_driver_name
);
5401 ret
= pci_register_driver(&e1000_driver
);
5405 module_init(e1000_init_module
);
5408 * e1000_exit_module - Driver Exit Cleanup Routine
5410 * e1000_exit_module is called just before the driver is removed
5413 static void __exit
e1000_exit_module(void)
5415 pci_unregister_driver(&e1000_driver
);
5417 module_exit(e1000_exit_module
);
5420 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
5421 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
5422 MODULE_LICENSE("GPL");
5423 MODULE_VERSION(DRV_VERSION
);