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
);
453 /* !EOP means multiple descriptors were used to store a single
454 * packet, also make sure the frame isn't just CRC only */
455 if (!(status
& E1000_RXD_STAT_EOP
) || (length
<= 4)) {
456 /* All receives must fit into a single buffer */
457 e_dbg("Receive packet consumed multiple buffers\n");
459 buffer_info
->skb
= skb
;
463 if (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
) {
465 buffer_info
->skb
= skb
;
469 /* adjust length to remove Ethernet CRC */
470 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
))
473 total_rx_bytes
+= length
;
477 * code added for copybreak, this should improve
478 * performance for small packets with large amounts
479 * of reassembly being done in the stack
481 if (length
< copybreak
) {
482 struct sk_buff
*new_skb
=
483 netdev_alloc_skb_ip_align(netdev
, length
);
485 skb_copy_to_linear_data_offset(new_skb
,
491 /* save the skb in buffer_info as good */
492 buffer_info
->skb
= skb
;
495 /* else just continue with the old one */
497 /* end copybreak code */
498 skb_put(skb
, length
);
500 /* Receive Checksum Offload */
501 e1000_rx_checksum(adapter
,
503 ((u32
)(rx_desc
->errors
) << 24),
504 le16_to_cpu(rx_desc
->csum
), skb
);
506 e1000_receive_skb(adapter
, netdev
, skb
,status
,rx_desc
->special
);
511 /* return some buffers to hardware, one at a time is too slow */
512 if (cleaned_count
>= E1000_RX_BUFFER_WRITE
) {
513 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
517 /* use prefetched values */
519 buffer_info
= next_buffer
;
521 rx_ring
->next_to_clean
= i
;
523 cleaned_count
= e1000_desc_unused(rx_ring
);
525 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
527 adapter
->total_rx_bytes
+= total_rx_bytes
;
528 adapter
->total_rx_packets
+= total_rx_packets
;
529 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
530 netdev
->stats
.rx_packets
+= total_rx_packets
;
534 static void e1000_put_txbuf(struct e1000_adapter
*adapter
,
535 struct e1000_buffer
*buffer_info
)
537 buffer_info
->dma
= 0;
538 if (buffer_info
->skb
) {
539 skb_dma_unmap(&adapter
->pdev
->dev
, buffer_info
->skb
,
541 dev_kfree_skb_any(buffer_info
->skb
);
542 buffer_info
->skb
= NULL
;
544 buffer_info
->time_stamp
= 0;
547 static void e1000_print_hw_hang(struct work_struct
*work
)
549 struct e1000_adapter
*adapter
= container_of(work
,
550 struct e1000_adapter
,
552 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
553 unsigned int i
= tx_ring
->next_to_clean
;
554 unsigned int eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
555 struct e1000_tx_desc
*eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
556 struct e1000_hw
*hw
= &adapter
->hw
;
557 u16 phy_status
, phy_1000t_status
, phy_ext_status
;
560 e1e_rphy(hw
, PHY_STATUS
, &phy_status
);
561 e1e_rphy(hw
, PHY_1000T_STATUS
, &phy_1000t_status
);
562 e1e_rphy(hw
, PHY_EXT_STATUS
, &phy_ext_status
);
564 pci_read_config_word(adapter
->pdev
, PCI_STATUS
, &pci_status
);
566 /* detected Hardware unit hang */
567 e_err("Detected Hardware Unit Hang:\n"
570 " next_to_use <%x>\n"
571 " next_to_clean <%x>\n"
572 "buffer_info[next_to_clean]:\n"
573 " time_stamp <%lx>\n"
574 " next_to_watch <%x>\n"
576 " next_to_watch.status <%x>\n"
579 "PHY 1000BASE-T Status <%x>\n"
580 "PHY Extended Status <%x>\n"
582 readl(adapter
->hw
.hw_addr
+ tx_ring
->head
),
583 readl(adapter
->hw
.hw_addr
+ tx_ring
->tail
),
584 tx_ring
->next_to_use
,
585 tx_ring
->next_to_clean
,
586 tx_ring
->buffer_info
[eop
].time_stamp
,
589 eop_desc
->upper
.fields
.status
,
598 * e1000_clean_tx_irq - Reclaim resources after transmit completes
599 * @adapter: board private structure
601 * the return value indicates whether actual cleaning was done, there
602 * is no guarantee that everything was cleaned
604 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
)
606 struct net_device
*netdev
= adapter
->netdev
;
607 struct e1000_hw
*hw
= &adapter
->hw
;
608 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
609 struct e1000_tx_desc
*tx_desc
, *eop_desc
;
610 struct e1000_buffer
*buffer_info
;
612 unsigned int count
= 0;
613 unsigned int total_tx_bytes
= 0, total_tx_packets
= 0;
615 i
= tx_ring
->next_to_clean
;
616 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
617 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
619 while ((eop_desc
->upper
.data
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
620 (count
< tx_ring
->count
)) {
621 bool cleaned
= false;
622 for (; !cleaned
; count
++) {
623 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
624 buffer_info
= &tx_ring
->buffer_info
[i
];
625 cleaned
= (i
== eop
);
628 struct sk_buff
*skb
= buffer_info
->skb
;
629 unsigned int segs
, bytecount
;
630 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
631 /* multiply data chunks by size of headers */
632 bytecount
= ((segs
- 1) * skb_headlen(skb
)) +
634 total_tx_packets
+= segs
;
635 total_tx_bytes
+= bytecount
;
638 e1000_put_txbuf(adapter
, buffer_info
);
639 tx_desc
->upper
.data
= 0;
642 if (i
== tx_ring
->count
)
646 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
647 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
650 tx_ring
->next_to_clean
= i
;
652 #define TX_WAKE_THRESHOLD 32
653 if (count
&& netif_carrier_ok(netdev
) &&
654 e1000_desc_unused(tx_ring
) >= TX_WAKE_THRESHOLD
) {
655 /* Make sure that anybody stopping the queue after this
656 * sees the new next_to_clean.
660 if (netif_queue_stopped(netdev
) &&
661 !(test_bit(__E1000_DOWN
, &adapter
->state
))) {
662 netif_wake_queue(netdev
);
663 ++adapter
->restart_queue
;
667 if (adapter
->detect_tx_hung
) {
669 * Detect a transmit hang in hardware, this serializes the
670 * check with the clearing of time_stamp and movement of i
672 adapter
->detect_tx_hung
= 0;
673 if (tx_ring
->buffer_info
[i
].time_stamp
&&
674 time_after(jiffies
, tx_ring
->buffer_info
[i
].time_stamp
675 + (adapter
->tx_timeout_factor
* HZ
))
676 && !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
677 schedule_work(&adapter
->print_hang_task
);
678 netif_stop_queue(netdev
);
681 adapter
->total_tx_bytes
+= total_tx_bytes
;
682 adapter
->total_tx_packets
+= total_tx_packets
;
683 netdev
->stats
.tx_bytes
+= total_tx_bytes
;
684 netdev
->stats
.tx_packets
+= total_tx_packets
;
685 return (count
< tx_ring
->count
);
689 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
690 * @adapter: board private structure
692 * the return value indicates whether actual cleaning was done, there
693 * is no guarantee that everything was cleaned
695 static bool e1000_clean_rx_irq_ps(struct e1000_adapter
*adapter
,
696 int *work_done
, int work_to_do
)
698 struct e1000_hw
*hw
= &adapter
->hw
;
699 union e1000_rx_desc_packet_split
*rx_desc
, *next_rxd
;
700 struct net_device
*netdev
= adapter
->netdev
;
701 struct pci_dev
*pdev
= adapter
->pdev
;
702 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
703 struct e1000_buffer
*buffer_info
, *next_buffer
;
704 struct e1000_ps_page
*ps_page
;
708 int cleaned_count
= 0;
710 unsigned int total_rx_bytes
= 0, total_rx_packets
= 0;
712 i
= rx_ring
->next_to_clean
;
713 rx_desc
= E1000_RX_DESC_PS(*rx_ring
, i
);
714 staterr
= le32_to_cpu(rx_desc
->wb
.middle
.status_error
);
715 buffer_info
= &rx_ring
->buffer_info
[i
];
717 while (staterr
& E1000_RXD_STAT_DD
) {
718 if (*work_done
>= work_to_do
)
721 skb
= buffer_info
->skb
;
723 /* in the packet split case this is header only */
724 prefetch(skb
->data
- NET_IP_ALIGN
);
727 if (i
== rx_ring
->count
)
729 next_rxd
= E1000_RX_DESC_PS(*rx_ring
, i
);
732 next_buffer
= &rx_ring
->buffer_info
[i
];
736 pci_unmap_single(pdev
, buffer_info
->dma
,
737 adapter
->rx_ps_bsize0
,
739 buffer_info
->dma
= 0;
741 if (!(staterr
& E1000_RXD_STAT_EOP
)) {
742 e_dbg("Packet Split buffers didn't pick up the full "
744 dev_kfree_skb_irq(skb
);
748 if (staterr
& E1000_RXDEXT_ERR_FRAME_ERR_MASK
) {
749 dev_kfree_skb_irq(skb
);
753 length
= le16_to_cpu(rx_desc
->wb
.middle
.length0
);
756 e_dbg("Last part of the packet spanning multiple "
758 dev_kfree_skb_irq(skb
);
763 skb_put(skb
, length
);
767 * this looks ugly, but it seems compiler issues make it
768 * more efficient than reusing j
770 int l1
= le16_to_cpu(rx_desc
->wb
.upper
.length
[0]);
773 * page alloc/put takes too long and effects small packet
774 * throughput, so unsplit small packets and save the alloc/put
775 * only valid in softirq (napi) context to call kmap_*
777 if (l1
&& (l1
<= copybreak
) &&
778 ((length
+ l1
) <= adapter
->rx_ps_bsize0
)) {
781 ps_page
= &buffer_info
->ps_pages
[0];
784 * there is no documentation about how to call
785 * kmap_atomic, so we can't hold the mapping
788 pci_dma_sync_single_for_cpu(pdev
, ps_page
->dma
,
789 PAGE_SIZE
, PCI_DMA_FROMDEVICE
);
790 vaddr
= kmap_atomic(ps_page
->page
, KM_SKB_DATA_SOFTIRQ
);
791 memcpy(skb_tail_pointer(skb
), vaddr
, l1
);
792 kunmap_atomic(vaddr
, KM_SKB_DATA_SOFTIRQ
);
793 pci_dma_sync_single_for_device(pdev
, ps_page
->dma
,
794 PAGE_SIZE
, PCI_DMA_FROMDEVICE
);
797 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
))
805 for (j
= 0; j
< PS_PAGE_BUFFERS
; j
++) {
806 length
= le16_to_cpu(rx_desc
->wb
.upper
.length
[j
]);
810 ps_page
= &buffer_info
->ps_pages
[j
];
811 pci_unmap_page(pdev
, ps_page
->dma
, PAGE_SIZE
,
814 skb_fill_page_desc(skb
, j
, ps_page
->page
, 0, length
);
815 ps_page
->page
= NULL
;
817 skb
->data_len
+= length
;
818 skb
->truesize
+= length
;
821 /* strip the ethernet crc, problem is we're using pages now so
822 * this whole operation can get a little cpu intensive
824 if (!(adapter
->flags2
& FLAG2_CRC_STRIPPING
))
825 pskb_trim(skb
, skb
->len
- 4);
828 total_rx_bytes
+= skb
->len
;
831 e1000_rx_checksum(adapter
, staterr
, le16_to_cpu(
832 rx_desc
->wb
.lower
.hi_dword
.csum_ip
.csum
), skb
);
834 if (rx_desc
->wb
.upper
.header_status
&
835 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP
))
836 adapter
->rx_hdr_split
++;
838 e1000_receive_skb(adapter
, netdev
, skb
,
839 staterr
, rx_desc
->wb
.middle
.vlan
);
842 rx_desc
->wb
.middle
.status_error
&= cpu_to_le32(~0xFF);
843 buffer_info
->skb
= NULL
;
845 /* return some buffers to hardware, one at a time is too slow */
846 if (cleaned_count
>= E1000_RX_BUFFER_WRITE
) {
847 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
851 /* use prefetched values */
853 buffer_info
= next_buffer
;
855 staterr
= le32_to_cpu(rx_desc
->wb
.middle
.status_error
);
857 rx_ring
->next_to_clean
= i
;
859 cleaned_count
= e1000_desc_unused(rx_ring
);
861 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
863 adapter
->total_rx_bytes
+= total_rx_bytes
;
864 adapter
->total_rx_packets
+= total_rx_packets
;
865 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
866 netdev
->stats
.rx_packets
+= total_rx_packets
;
871 * e1000_consume_page - helper function
873 static void e1000_consume_page(struct e1000_buffer
*bi
, struct sk_buff
*skb
,
878 skb
->data_len
+= length
;
879 skb
->truesize
+= length
;
883 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
884 * @adapter: board private structure
886 * the return value indicates whether actual cleaning was done, there
887 * is no guarantee that everything was cleaned
890 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
891 int *work_done
, int work_to_do
)
893 struct net_device
*netdev
= adapter
->netdev
;
894 struct pci_dev
*pdev
= adapter
->pdev
;
895 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
896 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
897 struct e1000_buffer
*buffer_info
, *next_buffer
;
900 int cleaned_count
= 0;
901 bool cleaned
= false;
902 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
904 i
= rx_ring
->next_to_clean
;
905 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
906 buffer_info
= &rx_ring
->buffer_info
[i
];
908 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
912 if (*work_done
>= work_to_do
)
916 status
= rx_desc
->status
;
917 skb
= buffer_info
->skb
;
918 buffer_info
->skb
= NULL
;
921 if (i
== rx_ring
->count
)
923 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
926 next_buffer
= &rx_ring
->buffer_info
[i
];
930 pci_unmap_page(pdev
, buffer_info
->dma
, PAGE_SIZE
,
932 buffer_info
->dma
= 0;
934 length
= le16_to_cpu(rx_desc
->length
);
936 /* errors is only valid for DD + EOP descriptors */
937 if (unlikely((status
& E1000_RXD_STAT_EOP
) &&
938 (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
))) {
939 /* recycle both page and skb */
940 buffer_info
->skb
= skb
;
941 /* an error means any chain goes out the window
943 if (rx_ring
->rx_skb_top
)
944 dev_kfree_skb(rx_ring
->rx_skb_top
);
945 rx_ring
->rx_skb_top
= NULL
;
949 #define rxtop rx_ring->rx_skb_top
950 if (!(status
& E1000_RXD_STAT_EOP
)) {
951 /* this descriptor is only the beginning (or middle) */
953 /* this is the beginning of a chain */
955 skb_fill_page_desc(rxtop
, 0, buffer_info
->page
,
958 /* this is the middle of a chain */
959 skb_fill_page_desc(rxtop
,
960 skb_shinfo(rxtop
)->nr_frags
,
961 buffer_info
->page
, 0, length
);
962 /* re-use the skb, only consumed the page */
963 buffer_info
->skb
= skb
;
965 e1000_consume_page(buffer_info
, rxtop
, length
);
969 /* end of the chain */
970 skb_fill_page_desc(rxtop
,
971 skb_shinfo(rxtop
)->nr_frags
,
972 buffer_info
->page
, 0, length
);
973 /* re-use the current skb, we only consumed the
975 buffer_info
->skb
= skb
;
978 e1000_consume_page(buffer_info
, skb
, length
);
980 /* no chain, got EOP, this buf is the packet
981 * copybreak to save the put_page/alloc_page */
982 if (length
<= copybreak
&&
983 skb_tailroom(skb
) >= length
) {
985 vaddr
= kmap_atomic(buffer_info
->page
,
986 KM_SKB_DATA_SOFTIRQ
);
987 memcpy(skb_tail_pointer(skb
), vaddr
,
990 KM_SKB_DATA_SOFTIRQ
);
991 /* re-use the page, so don't erase
992 * buffer_info->page */
993 skb_put(skb
, length
);
995 skb_fill_page_desc(skb
, 0,
996 buffer_info
->page
, 0,
998 e1000_consume_page(buffer_info
, skb
,
1004 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1005 e1000_rx_checksum(adapter
,
1007 ((u32
)(rx_desc
->errors
) << 24),
1008 le16_to_cpu(rx_desc
->csum
), skb
);
1010 /* probably a little skewed due to removing CRC */
1011 total_rx_bytes
+= skb
->len
;
1014 /* eth type trans needs skb->data to point to something */
1015 if (!pskb_may_pull(skb
, ETH_HLEN
)) {
1016 e_err("pskb_may_pull failed.\n");
1021 e1000_receive_skb(adapter
, netdev
, skb
, status
,
1025 rx_desc
->status
= 0;
1027 /* return some buffers to hardware, one at a time is too slow */
1028 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
1029 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
1033 /* use prefetched values */
1035 buffer_info
= next_buffer
;
1037 rx_ring
->next_to_clean
= i
;
1039 cleaned_count
= e1000_desc_unused(rx_ring
);
1041 adapter
->alloc_rx_buf(adapter
, cleaned_count
);
1043 adapter
->total_rx_bytes
+= total_rx_bytes
;
1044 adapter
->total_rx_packets
+= total_rx_packets
;
1045 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
1046 netdev
->stats
.rx_packets
+= total_rx_packets
;
1051 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1052 * @adapter: board private structure
1054 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
)
1056 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1057 struct e1000_buffer
*buffer_info
;
1058 struct e1000_ps_page
*ps_page
;
1059 struct pci_dev
*pdev
= adapter
->pdev
;
1062 /* Free all the Rx ring sk_buffs */
1063 for (i
= 0; i
< rx_ring
->count
; i
++) {
1064 buffer_info
= &rx_ring
->buffer_info
[i
];
1065 if (buffer_info
->dma
) {
1066 if (adapter
->clean_rx
== e1000_clean_rx_irq
)
1067 pci_unmap_single(pdev
, buffer_info
->dma
,
1068 adapter
->rx_buffer_len
,
1069 PCI_DMA_FROMDEVICE
);
1070 else if (adapter
->clean_rx
== e1000_clean_jumbo_rx_irq
)
1071 pci_unmap_page(pdev
, buffer_info
->dma
,
1073 PCI_DMA_FROMDEVICE
);
1074 else if (adapter
->clean_rx
== e1000_clean_rx_irq_ps
)
1075 pci_unmap_single(pdev
, buffer_info
->dma
,
1076 adapter
->rx_ps_bsize0
,
1077 PCI_DMA_FROMDEVICE
);
1078 buffer_info
->dma
= 0;
1081 if (buffer_info
->page
) {
1082 put_page(buffer_info
->page
);
1083 buffer_info
->page
= NULL
;
1086 if (buffer_info
->skb
) {
1087 dev_kfree_skb(buffer_info
->skb
);
1088 buffer_info
->skb
= NULL
;
1091 for (j
= 0; j
< PS_PAGE_BUFFERS
; j
++) {
1092 ps_page
= &buffer_info
->ps_pages
[j
];
1095 pci_unmap_page(pdev
, ps_page
->dma
, PAGE_SIZE
,
1096 PCI_DMA_FROMDEVICE
);
1098 put_page(ps_page
->page
);
1099 ps_page
->page
= NULL
;
1103 /* there also may be some cached data from a chained receive */
1104 if (rx_ring
->rx_skb_top
) {
1105 dev_kfree_skb(rx_ring
->rx_skb_top
);
1106 rx_ring
->rx_skb_top
= NULL
;
1109 /* Zero out the descriptor ring */
1110 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1112 rx_ring
->next_to_clean
= 0;
1113 rx_ring
->next_to_use
= 0;
1115 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->head
);
1116 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
1119 static void e1000e_downshift_workaround(struct work_struct
*work
)
1121 struct e1000_adapter
*adapter
= container_of(work
,
1122 struct e1000_adapter
, downshift_task
);
1124 e1000e_gig_downshift_workaround_ich8lan(&adapter
->hw
);
1128 * e1000_intr_msi - Interrupt Handler
1129 * @irq: interrupt number
1130 * @data: pointer to a network interface device structure
1132 static irqreturn_t
e1000_intr_msi(int irq
, void *data
)
1134 struct net_device
*netdev
= data
;
1135 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1136 struct e1000_hw
*hw
= &adapter
->hw
;
1137 u32 icr
= er32(ICR
);
1140 * read ICR disables interrupts using IAM
1143 if (icr
& E1000_ICR_LSC
) {
1144 hw
->mac
.get_link_status
= 1;
1146 * ICH8 workaround-- Call gig speed drop workaround on cable
1147 * disconnect (LSC) before accessing any PHY registers
1149 if ((adapter
->flags
& FLAG_LSC_GIG_SPEED_DROP
) &&
1150 (!(er32(STATUS
) & E1000_STATUS_LU
)))
1151 schedule_work(&adapter
->downshift_task
);
1154 * 80003ES2LAN workaround-- For packet buffer work-around on
1155 * link down event; disable receives here in the ISR and reset
1156 * adapter in watchdog
1158 if (netif_carrier_ok(netdev
) &&
1159 adapter
->flags
& FLAG_RX_NEEDS_RESTART
) {
1160 /* disable receives */
1161 u32 rctl
= er32(RCTL
);
1162 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1163 adapter
->flags
|= FLAG_RX_RESTART_NOW
;
1165 /* guard against interrupt when we're going down */
1166 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1167 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1170 if (napi_schedule_prep(&adapter
->napi
)) {
1171 adapter
->total_tx_bytes
= 0;
1172 adapter
->total_tx_packets
= 0;
1173 adapter
->total_rx_bytes
= 0;
1174 adapter
->total_rx_packets
= 0;
1175 __napi_schedule(&adapter
->napi
);
1182 * e1000_intr - Interrupt Handler
1183 * @irq: interrupt number
1184 * @data: pointer to a network interface device structure
1186 static irqreturn_t
e1000_intr(int irq
, void *data
)
1188 struct net_device
*netdev
= data
;
1189 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1190 struct e1000_hw
*hw
= &adapter
->hw
;
1191 u32 rctl
, icr
= er32(ICR
);
1193 if (!icr
|| test_bit(__E1000_DOWN
, &adapter
->state
))
1194 return IRQ_NONE
; /* Not our interrupt */
1197 * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1198 * not set, then the adapter didn't send an interrupt
1200 if (!(icr
& E1000_ICR_INT_ASSERTED
))
1204 * Interrupt Auto-Mask...upon reading ICR,
1205 * interrupts are masked. No need for the
1209 if (icr
& E1000_ICR_LSC
) {
1210 hw
->mac
.get_link_status
= 1;
1212 * ICH8 workaround-- Call gig speed drop workaround on cable
1213 * disconnect (LSC) before accessing any PHY registers
1215 if ((adapter
->flags
& FLAG_LSC_GIG_SPEED_DROP
) &&
1216 (!(er32(STATUS
) & E1000_STATUS_LU
)))
1217 schedule_work(&adapter
->downshift_task
);
1220 * 80003ES2LAN workaround--
1221 * For packet buffer work-around on link down event;
1222 * disable receives here in the ISR and
1223 * reset adapter in watchdog
1225 if (netif_carrier_ok(netdev
) &&
1226 (adapter
->flags
& FLAG_RX_NEEDS_RESTART
)) {
1227 /* disable receives */
1229 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1230 adapter
->flags
|= FLAG_RX_RESTART_NOW
;
1232 /* guard against interrupt when we're going down */
1233 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1234 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1237 if (napi_schedule_prep(&adapter
->napi
)) {
1238 adapter
->total_tx_bytes
= 0;
1239 adapter
->total_tx_packets
= 0;
1240 adapter
->total_rx_bytes
= 0;
1241 adapter
->total_rx_packets
= 0;
1242 __napi_schedule(&adapter
->napi
);
1248 static irqreturn_t
e1000_msix_other(int irq
, void *data
)
1250 struct net_device
*netdev
= data
;
1251 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1252 struct e1000_hw
*hw
= &adapter
->hw
;
1253 u32 icr
= er32(ICR
);
1255 if (!(icr
& E1000_ICR_INT_ASSERTED
)) {
1256 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1257 ew32(IMS
, E1000_IMS_OTHER
);
1261 if (icr
& adapter
->eiac_mask
)
1262 ew32(ICS
, (icr
& adapter
->eiac_mask
));
1264 if (icr
& E1000_ICR_OTHER
) {
1265 if (!(icr
& E1000_ICR_LSC
))
1266 goto no_link_interrupt
;
1267 hw
->mac
.get_link_status
= 1;
1268 /* guard against interrupt when we're going down */
1269 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1270 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1274 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
1275 ew32(IMS
, E1000_IMS_LSC
| E1000_IMS_OTHER
);
1281 static irqreturn_t
e1000_intr_msix_tx(int irq
, void *data
)
1283 struct net_device
*netdev
= data
;
1284 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1285 struct e1000_hw
*hw
= &adapter
->hw
;
1286 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1289 adapter
->total_tx_bytes
= 0;
1290 adapter
->total_tx_packets
= 0;
1292 if (!e1000_clean_tx_irq(adapter
))
1293 /* Ring was not completely cleaned, so fire another interrupt */
1294 ew32(ICS
, tx_ring
->ims_val
);
1299 static irqreturn_t
e1000_intr_msix_rx(int irq
, void *data
)
1301 struct net_device
*netdev
= data
;
1302 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1304 /* Write the ITR value calculated at the end of the
1305 * previous interrupt.
1307 if (adapter
->rx_ring
->set_itr
) {
1308 writel(1000000000 / (adapter
->rx_ring
->itr_val
* 256),
1309 adapter
->hw
.hw_addr
+ adapter
->rx_ring
->itr_register
);
1310 adapter
->rx_ring
->set_itr
= 0;
1313 if (napi_schedule_prep(&adapter
->napi
)) {
1314 adapter
->total_rx_bytes
= 0;
1315 adapter
->total_rx_packets
= 0;
1316 __napi_schedule(&adapter
->napi
);
1322 * e1000_configure_msix - Configure MSI-X hardware
1324 * e1000_configure_msix sets up the hardware to properly
1325 * generate MSI-X interrupts.
1327 static void e1000_configure_msix(struct e1000_adapter
*adapter
)
1329 struct e1000_hw
*hw
= &adapter
->hw
;
1330 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1331 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1333 u32 ctrl_ext
, ivar
= 0;
1335 adapter
->eiac_mask
= 0;
1337 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1338 if (hw
->mac
.type
== e1000_82574
) {
1339 u32 rfctl
= er32(RFCTL
);
1340 rfctl
|= E1000_RFCTL_ACK_DIS
;
1344 #define E1000_IVAR_INT_ALLOC_VALID 0x8
1345 /* Configure Rx vector */
1346 rx_ring
->ims_val
= E1000_IMS_RXQ0
;
1347 adapter
->eiac_mask
|= rx_ring
->ims_val
;
1348 if (rx_ring
->itr_val
)
1349 writel(1000000000 / (rx_ring
->itr_val
* 256),
1350 hw
->hw_addr
+ rx_ring
->itr_register
);
1352 writel(1, hw
->hw_addr
+ rx_ring
->itr_register
);
1353 ivar
= E1000_IVAR_INT_ALLOC_VALID
| vector
;
1355 /* Configure Tx vector */
1356 tx_ring
->ims_val
= E1000_IMS_TXQ0
;
1358 if (tx_ring
->itr_val
)
1359 writel(1000000000 / (tx_ring
->itr_val
* 256),
1360 hw
->hw_addr
+ tx_ring
->itr_register
);
1362 writel(1, hw
->hw_addr
+ tx_ring
->itr_register
);
1363 adapter
->eiac_mask
|= tx_ring
->ims_val
;
1364 ivar
|= ((E1000_IVAR_INT_ALLOC_VALID
| vector
) << 8);
1366 /* set vector for Other Causes, e.g. link changes */
1368 ivar
|= ((E1000_IVAR_INT_ALLOC_VALID
| vector
) << 16);
1369 if (rx_ring
->itr_val
)
1370 writel(1000000000 / (rx_ring
->itr_val
* 256),
1371 hw
->hw_addr
+ E1000_EITR_82574(vector
));
1373 writel(1, hw
->hw_addr
+ E1000_EITR_82574(vector
));
1375 /* Cause Tx interrupts on every write back */
1380 /* enable MSI-X PBA support */
1381 ctrl_ext
= er32(CTRL_EXT
);
1382 ctrl_ext
|= E1000_CTRL_EXT_PBA_CLR
;
1384 /* Auto-Mask Other interrupts upon ICR read */
1385 #define E1000_EIAC_MASK_82574 0x01F00000
1386 ew32(IAM
, ~E1000_EIAC_MASK_82574
| E1000_IMS_OTHER
);
1387 ctrl_ext
|= E1000_CTRL_EXT_EIAME
;
1388 ew32(CTRL_EXT
, ctrl_ext
);
1392 void e1000e_reset_interrupt_capability(struct e1000_adapter
*adapter
)
1394 if (adapter
->msix_entries
) {
1395 pci_disable_msix(adapter
->pdev
);
1396 kfree(adapter
->msix_entries
);
1397 adapter
->msix_entries
= NULL
;
1398 } else if (adapter
->flags
& FLAG_MSI_ENABLED
) {
1399 pci_disable_msi(adapter
->pdev
);
1400 adapter
->flags
&= ~FLAG_MSI_ENABLED
;
1407 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1409 * Attempt to configure interrupts using the best available
1410 * capabilities of the hardware and kernel.
1412 void e1000e_set_interrupt_capability(struct e1000_adapter
*adapter
)
1418 switch (adapter
->int_mode
) {
1419 case E1000E_INT_MODE_MSIX
:
1420 if (adapter
->flags
& FLAG_HAS_MSIX
) {
1421 numvecs
= 3; /* RxQ0, TxQ0 and other */
1422 adapter
->msix_entries
= kcalloc(numvecs
,
1423 sizeof(struct msix_entry
),
1425 if (adapter
->msix_entries
) {
1426 for (i
= 0; i
< numvecs
; i
++)
1427 adapter
->msix_entries
[i
].entry
= i
;
1429 err
= pci_enable_msix(adapter
->pdev
,
1430 adapter
->msix_entries
,
1435 /* MSI-X failed, so fall through and try MSI */
1436 e_err("Failed to initialize MSI-X interrupts. "
1437 "Falling back to MSI interrupts.\n");
1438 e1000e_reset_interrupt_capability(adapter
);
1440 adapter
->int_mode
= E1000E_INT_MODE_MSI
;
1442 case E1000E_INT_MODE_MSI
:
1443 if (!pci_enable_msi(adapter
->pdev
)) {
1444 adapter
->flags
|= FLAG_MSI_ENABLED
;
1446 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
1447 e_err("Failed to initialize MSI interrupts. Falling "
1448 "back to legacy interrupts.\n");
1451 case E1000E_INT_MODE_LEGACY
:
1452 /* Don't do anything; this is the system default */
1460 * e1000_request_msix - Initialize MSI-X interrupts
1462 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1465 static int e1000_request_msix(struct e1000_adapter
*adapter
)
1467 struct net_device
*netdev
= adapter
->netdev
;
1468 int err
= 0, vector
= 0;
1470 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5))
1471 sprintf(adapter
->rx_ring
->name
, "%s-rx-0", netdev
->name
);
1473 memcpy(adapter
->rx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1474 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1475 e1000_intr_msix_rx
, 0, adapter
->rx_ring
->name
,
1479 adapter
->rx_ring
->itr_register
= E1000_EITR_82574(vector
);
1480 adapter
->rx_ring
->itr_val
= adapter
->itr
;
1483 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5))
1484 sprintf(adapter
->tx_ring
->name
, "%s-tx-0", netdev
->name
);
1486 memcpy(adapter
->tx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1487 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1488 e1000_intr_msix_tx
, 0, adapter
->tx_ring
->name
,
1492 adapter
->tx_ring
->itr_register
= E1000_EITR_82574(vector
);
1493 adapter
->tx_ring
->itr_val
= adapter
->itr
;
1496 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1497 e1000_msix_other
, 0, netdev
->name
, netdev
);
1501 e1000_configure_msix(adapter
);
1508 * e1000_request_irq - initialize interrupts
1510 * Attempts to configure interrupts using the best available
1511 * capabilities of the hardware and kernel.
1513 static int e1000_request_irq(struct e1000_adapter
*adapter
)
1515 struct net_device
*netdev
= adapter
->netdev
;
1518 if (adapter
->msix_entries
) {
1519 err
= e1000_request_msix(adapter
);
1522 /* fall back to MSI */
1523 e1000e_reset_interrupt_capability(adapter
);
1524 adapter
->int_mode
= E1000E_INT_MODE_MSI
;
1525 e1000e_set_interrupt_capability(adapter
);
1527 if (adapter
->flags
& FLAG_MSI_ENABLED
) {
1528 err
= request_irq(adapter
->pdev
->irq
, e1000_intr_msi
, 0,
1529 netdev
->name
, netdev
);
1533 /* fall back to legacy interrupt */
1534 e1000e_reset_interrupt_capability(adapter
);
1535 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
1538 err
= request_irq(adapter
->pdev
->irq
, e1000_intr
, IRQF_SHARED
,
1539 netdev
->name
, netdev
);
1541 e_err("Unable to allocate interrupt, Error: %d\n", err
);
1546 static void e1000_free_irq(struct e1000_adapter
*adapter
)
1548 struct net_device
*netdev
= adapter
->netdev
;
1550 if (adapter
->msix_entries
) {
1553 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1556 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1559 /* Other Causes interrupt vector */
1560 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1564 free_irq(adapter
->pdev
->irq
, netdev
);
1568 * e1000_irq_disable - Mask off interrupt generation on the NIC
1570 static void e1000_irq_disable(struct e1000_adapter
*adapter
)
1572 struct e1000_hw
*hw
= &adapter
->hw
;
1575 if (adapter
->msix_entries
)
1576 ew32(EIAC_82574
, 0);
1578 synchronize_irq(adapter
->pdev
->irq
);
1582 * e1000_irq_enable - Enable default interrupt generation settings
1584 static void e1000_irq_enable(struct e1000_adapter
*adapter
)
1586 struct e1000_hw
*hw
= &adapter
->hw
;
1588 if (adapter
->msix_entries
) {
1589 ew32(EIAC_82574
, adapter
->eiac_mask
& E1000_EIAC_MASK_82574
);
1590 ew32(IMS
, adapter
->eiac_mask
| E1000_IMS_OTHER
| E1000_IMS_LSC
);
1592 ew32(IMS
, IMS_ENABLE_MASK
);
1598 * e1000_get_hw_control - get control of the h/w from f/w
1599 * @adapter: address of board private structure
1601 * e1000_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1602 * For ASF and Pass Through versions of f/w this means that
1603 * the driver is loaded. For AMT version (only with 82573)
1604 * of the f/w this means that the network i/f is open.
1606 static void e1000_get_hw_control(struct e1000_adapter
*adapter
)
1608 struct e1000_hw
*hw
= &adapter
->hw
;
1612 /* Let firmware know the driver has taken over */
1613 if (adapter
->flags
& FLAG_HAS_SWSM_ON_LOAD
) {
1615 ew32(SWSM
, swsm
| E1000_SWSM_DRV_LOAD
);
1616 } else if (adapter
->flags
& FLAG_HAS_CTRLEXT_ON_LOAD
) {
1617 ctrl_ext
= er32(CTRL_EXT
);
1618 ew32(CTRL_EXT
, ctrl_ext
| E1000_CTRL_EXT_DRV_LOAD
);
1623 * e1000_release_hw_control - release control of the h/w to f/w
1624 * @adapter: address of board private structure
1626 * e1000_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1627 * For ASF and Pass Through versions of f/w this means that the
1628 * driver is no longer loaded. For AMT version (only with 82573) i
1629 * of the f/w this means that the network i/f is closed.
1632 static void e1000_release_hw_control(struct e1000_adapter
*adapter
)
1634 struct e1000_hw
*hw
= &adapter
->hw
;
1638 /* Let firmware taken over control of h/w */
1639 if (adapter
->flags
& FLAG_HAS_SWSM_ON_LOAD
) {
1641 ew32(SWSM
, swsm
& ~E1000_SWSM_DRV_LOAD
);
1642 } else if (adapter
->flags
& FLAG_HAS_CTRLEXT_ON_LOAD
) {
1643 ctrl_ext
= er32(CTRL_EXT
);
1644 ew32(CTRL_EXT
, ctrl_ext
& ~E1000_CTRL_EXT_DRV_LOAD
);
1649 * @e1000_alloc_ring - allocate memory for a ring structure
1651 static int e1000_alloc_ring_dma(struct e1000_adapter
*adapter
,
1652 struct e1000_ring
*ring
)
1654 struct pci_dev
*pdev
= adapter
->pdev
;
1656 ring
->desc
= dma_alloc_coherent(&pdev
->dev
, ring
->size
, &ring
->dma
,
1665 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
1666 * @adapter: board private structure
1668 * Return 0 on success, negative on failure
1670 int e1000e_setup_tx_resources(struct e1000_adapter
*adapter
)
1672 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1673 int err
= -ENOMEM
, size
;
1675 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
1676 tx_ring
->buffer_info
= vmalloc(size
);
1677 if (!tx_ring
->buffer_info
)
1679 memset(tx_ring
->buffer_info
, 0, size
);
1681 /* round up to nearest 4K */
1682 tx_ring
->size
= tx_ring
->count
* sizeof(struct e1000_tx_desc
);
1683 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
1685 err
= e1000_alloc_ring_dma(adapter
, tx_ring
);
1689 tx_ring
->next_to_use
= 0;
1690 tx_ring
->next_to_clean
= 0;
1694 vfree(tx_ring
->buffer_info
);
1695 e_err("Unable to allocate memory for the transmit descriptor ring\n");
1700 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
1701 * @adapter: board private structure
1703 * Returns 0 on success, negative on failure
1705 int e1000e_setup_rx_resources(struct e1000_adapter
*adapter
)
1707 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1708 struct e1000_buffer
*buffer_info
;
1709 int i
, size
, desc_len
, err
= -ENOMEM
;
1711 size
= sizeof(struct e1000_buffer
) * rx_ring
->count
;
1712 rx_ring
->buffer_info
= vmalloc(size
);
1713 if (!rx_ring
->buffer_info
)
1715 memset(rx_ring
->buffer_info
, 0, size
);
1717 for (i
= 0; i
< rx_ring
->count
; i
++) {
1718 buffer_info
= &rx_ring
->buffer_info
[i
];
1719 buffer_info
->ps_pages
= kcalloc(PS_PAGE_BUFFERS
,
1720 sizeof(struct e1000_ps_page
),
1722 if (!buffer_info
->ps_pages
)
1726 desc_len
= sizeof(union e1000_rx_desc_packet_split
);
1728 /* Round up to nearest 4K */
1729 rx_ring
->size
= rx_ring
->count
* desc_len
;
1730 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
1732 err
= e1000_alloc_ring_dma(adapter
, rx_ring
);
1736 rx_ring
->next_to_clean
= 0;
1737 rx_ring
->next_to_use
= 0;
1738 rx_ring
->rx_skb_top
= NULL
;
1743 for (i
= 0; i
< rx_ring
->count
; i
++) {
1744 buffer_info
= &rx_ring
->buffer_info
[i
];
1745 kfree(buffer_info
->ps_pages
);
1748 vfree(rx_ring
->buffer_info
);
1749 e_err("Unable to allocate memory for the transmit descriptor ring\n");
1754 * e1000_clean_tx_ring - Free Tx Buffers
1755 * @adapter: board private structure
1757 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
)
1759 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1760 struct e1000_buffer
*buffer_info
;
1764 for (i
= 0; i
< tx_ring
->count
; i
++) {
1765 buffer_info
= &tx_ring
->buffer_info
[i
];
1766 e1000_put_txbuf(adapter
, buffer_info
);
1769 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
1770 memset(tx_ring
->buffer_info
, 0, size
);
1772 memset(tx_ring
->desc
, 0, tx_ring
->size
);
1774 tx_ring
->next_to_use
= 0;
1775 tx_ring
->next_to_clean
= 0;
1777 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->head
);
1778 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
1782 * e1000e_free_tx_resources - Free Tx Resources per Queue
1783 * @adapter: board private structure
1785 * Free all transmit software resources
1787 void e1000e_free_tx_resources(struct e1000_adapter
*adapter
)
1789 struct pci_dev
*pdev
= adapter
->pdev
;
1790 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
1792 e1000_clean_tx_ring(adapter
);
1794 vfree(tx_ring
->buffer_info
);
1795 tx_ring
->buffer_info
= NULL
;
1797 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
1799 tx_ring
->desc
= NULL
;
1803 * e1000e_free_rx_resources - Free Rx Resources
1804 * @adapter: board private structure
1806 * Free all receive software resources
1809 void e1000e_free_rx_resources(struct e1000_adapter
*adapter
)
1811 struct pci_dev
*pdev
= adapter
->pdev
;
1812 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
1815 e1000_clean_rx_ring(adapter
);
1817 for (i
= 0; i
< rx_ring
->count
; i
++) {
1818 kfree(rx_ring
->buffer_info
[i
].ps_pages
);
1821 vfree(rx_ring
->buffer_info
);
1822 rx_ring
->buffer_info
= NULL
;
1824 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
1826 rx_ring
->desc
= NULL
;
1830 * e1000_update_itr - update the dynamic ITR value based on statistics
1831 * @adapter: pointer to adapter
1832 * @itr_setting: current adapter->itr
1833 * @packets: the number of packets during this measurement interval
1834 * @bytes: the number of bytes during this measurement interval
1836 * Stores a new ITR value based on packets and byte
1837 * counts during the last interrupt. The advantage of per interrupt
1838 * computation is faster updates and more accurate ITR for the current
1839 * traffic pattern. Constants in this function were computed
1840 * based on theoretical maximum wire speed and thresholds were set based
1841 * on testing data as well as attempting to minimize response time
1842 * while increasing bulk throughput. This functionality is controlled
1843 * by the InterruptThrottleRate module parameter.
1845 static unsigned int e1000_update_itr(struct e1000_adapter
*adapter
,
1846 u16 itr_setting
, int packets
,
1849 unsigned int retval
= itr_setting
;
1852 goto update_itr_done
;
1854 switch (itr_setting
) {
1855 case lowest_latency
:
1856 /* handle TSO and jumbo frames */
1857 if (bytes
/packets
> 8000)
1858 retval
= bulk_latency
;
1859 else if ((packets
< 5) && (bytes
> 512)) {
1860 retval
= low_latency
;
1863 case low_latency
: /* 50 usec aka 20000 ints/s */
1864 if (bytes
> 10000) {
1865 /* this if handles the TSO accounting */
1866 if (bytes
/packets
> 8000) {
1867 retval
= bulk_latency
;
1868 } else if ((packets
< 10) || ((bytes
/packets
) > 1200)) {
1869 retval
= bulk_latency
;
1870 } else if ((packets
> 35)) {
1871 retval
= lowest_latency
;
1873 } else if (bytes
/packets
> 2000) {
1874 retval
= bulk_latency
;
1875 } else if (packets
<= 2 && bytes
< 512) {
1876 retval
= lowest_latency
;
1879 case bulk_latency
: /* 250 usec aka 4000 ints/s */
1880 if (bytes
> 25000) {
1882 retval
= low_latency
;
1884 } else if (bytes
< 6000) {
1885 retval
= low_latency
;
1894 static void e1000_set_itr(struct e1000_adapter
*adapter
)
1896 struct e1000_hw
*hw
= &adapter
->hw
;
1898 u32 new_itr
= adapter
->itr
;
1900 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
1901 if (adapter
->link_speed
!= SPEED_1000
) {
1907 adapter
->tx_itr
= e1000_update_itr(adapter
,
1909 adapter
->total_tx_packets
,
1910 adapter
->total_tx_bytes
);
1911 /* conservative mode (itr 3) eliminates the lowest_latency setting */
1912 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
1913 adapter
->tx_itr
= low_latency
;
1915 adapter
->rx_itr
= e1000_update_itr(adapter
,
1917 adapter
->total_rx_packets
,
1918 adapter
->total_rx_bytes
);
1919 /* conservative mode (itr 3) eliminates the lowest_latency setting */
1920 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
1921 adapter
->rx_itr
= low_latency
;
1923 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
1925 switch (current_itr
) {
1926 /* counts and packets in update_itr are dependent on these numbers */
1927 case lowest_latency
:
1931 new_itr
= 20000; /* aka hwitr = ~200 */
1941 if (new_itr
!= adapter
->itr
) {
1943 * this attempts to bias the interrupt rate towards Bulk
1944 * by adding intermediate steps when interrupt rate is
1947 new_itr
= new_itr
> adapter
->itr
?
1948 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
1950 adapter
->itr
= new_itr
;
1951 adapter
->rx_ring
->itr_val
= new_itr
;
1952 if (adapter
->msix_entries
)
1953 adapter
->rx_ring
->set_itr
= 1;
1955 ew32(ITR
, 1000000000 / (new_itr
* 256));
1960 * e1000_alloc_queues - Allocate memory for all rings
1961 * @adapter: board private structure to initialize
1963 static int __devinit
e1000_alloc_queues(struct e1000_adapter
*adapter
)
1965 adapter
->tx_ring
= kzalloc(sizeof(struct e1000_ring
), GFP_KERNEL
);
1966 if (!adapter
->tx_ring
)
1969 adapter
->rx_ring
= kzalloc(sizeof(struct e1000_ring
), GFP_KERNEL
);
1970 if (!adapter
->rx_ring
)
1975 e_err("Unable to allocate memory for queues\n");
1976 kfree(adapter
->rx_ring
);
1977 kfree(adapter
->tx_ring
);
1982 * e1000_clean - NAPI Rx polling callback
1983 * @napi: struct associated with this polling callback
1984 * @budget: amount of packets driver is allowed to process this poll
1986 static int e1000_clean(struct napi_struct
*napi
, int budget
)
1988 struct e1000_adapter
*adapter
= container_of(napi
, struct e1000_adapter
, napi
);
1989 struct e1000_hw
*hw
= &adapter
->hw
;
1990 struct net_device
*poll_dev
= adapter
->netdev
;
1991 int tx_cleaned
= 1, work_done
= 0;
1993 adapter
= netdev_priv(poll_dev
);
1995 if (adapter
->msix_entries
&&
1996 !(adapter
->rx_ring
->ims_val
& adapter
->tx_ring
->ims_val
))
1999 tx_cleaned
= e1000_clean_tx_irq(adapter
);
2002 adapter
->clean_rx(adapter
, &work_done
, budget
);
2007 /* If budget not fully consumed, exit the polling mode */
2008 if (work_done
< budget
) {
2009 if (adapter
->itr_setting
& 3)
2010 e1000_set_itr(adapter
);
2011 napi_complete(napi
);
2012 if (!test_bit(__E1000_DOWN
, &adapter
->state
)) {
2013 if (adapter
->msix_entries
)
2014 ew32(IMS
, adapter
->rx_ring
->ims_val
);
2016 e1000_irq_enable(adapter
);
2023 static void e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
2025 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2026 struct e1000_hw
*hw
= &adapter
->hw
;
2029 /* don't update vlan cookie if already programmed */
2030 if ((adapter
->hw
.mng_cookie
.status
&
2031 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
2032 (vid
== adapter
->mng_vlan_id
))
2035 /* add VID to filter table */
2036 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2037 index
= (vid
>> 5) & 0x7F;
2038 vfta
= E1000_READ_REG_ARRAY(hw
, E1000_VFTA
, index
);
2039 vfta
|= (1 << (vid
& 0x1F));
2040 hw
->mac
.ops
.write_vfta(hw
, index
, vfta
);
2044 static void e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
2046 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2047 struct e1000_hw
*hw
= &adapter
->hw
;
2050 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2051 e1000_irq_disable(adapter
);
2052 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
2054 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2055 e1000_irq_enable(adapter
);
2057 if ((adapter
->hw
.mng_cookie
.status
&
2058 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
2059 (vid
== adapter
->mng_vlan_id
)) {
2060 /* release control to f/w */
2061 e1000_release_hw_control(adapter
);
2065 /* remove VID from filter table */
2066 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2067 index
= (vid
>> 5) & 0x7F;
2068 vfta
= E1000_READ_REG_ARRAY(hw
, E1000_VFTA
, index
);
2069 vfta
&= ~(1 << (vid
& 0x1F));
2070 hw
->mac
.ops
.write_vfta(hw
, index
, vfta
);
2074 static void e1000_update_mng_vlan(struct e1000_adapter
*adapter
)
2076 struct net_device
*netdev
= adapter
->netdev
;
2077 u16 vid
= adapter
->hw
.mng_cookie
.vlan_id
;
2078 u16 old_vid
= adapter
->mng_vlan_id
;
2080 if (!adapter
->vlgrp
)
2083 if (!vlan_group_get_device(adapter
->vlgrp
, vid
)) {
2084 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
2085 if (adapter
->hw
.mng_cookie
.status
&
2086 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) {
2087 e1000_vlan_rx_add_vid(netdev
, vid
);
2088 adapter
->mng_vlan_id
= vid
;
2091 if ((old_vid
!= (u16
)E1000_MNG_VLAN_NONE
) &&
2093 !vlan_group_get_device(adapter
->vlgrp
, old_vid
))
2094 e1000_vlan_rx_kill_vid(netdev
, old_vid
);
2096 adapter
->mng_vlan_id
= vid
;
2101 static void e1000_vlan_rx_register(struct net_device
*netdev
,
2102 struct vlan_group
*grp
)
2104 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2105 struct e1000_hw
*hw
= &adapter
->hw
;
2108 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2109 e1000_irq_disable(adapter
);
2110 adapter
->vlgrp
= grp
;
2113 /* enable VLAN tag insert/strip */
2115 ctrl
|= E1000_CTRL_VME
;
2118 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2119 /* enable VLAN receive filtering */
2121 rctl
&= ~E1000_RCTL_CFIEN
;
2123 e1000_update_mng_vlan(adapter
);
2126 /* disable VLAN tag insert/strip */
2128 ctrl
&= ~E1000_CTRL_VME
;
2131 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
) {
2132 if (adapter
->mng_vlan_id
!=
2133 (u16
)E1000_MNG_VLAN_NONE
) {
2134 e1000_vlan_rx_kill_vid(netdev
,
2135 adapter
->mng_vlan_id
);
2136 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
2141 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
2142 e1000_irq_enable(adapter
);
2145 static void e1000_restore_vlan(struct e1000_adapter
*adapter
)
2149 e1000_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
2151 if (!adapter
->vlgrp
)
2154 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
2155 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
2157 e1000_vlan_rx_add_vid(adapter
->netdev
, vid
);
2161 static void e1000_init_manageability(struct e1000_adapter
*adapter
)
2163 struct e1000_hw
*hw
= &adapter
->hw
;
2166 if (!(adapter
->flags
& FLAG_MNG_PT_ENABLED
))
2172 * enable receiving management packets to the host. this will probably
2173 * generate destination unreachable messages from the host OS, but
2174 * the packets will be handled on SMBUS
2176 manc
|= E1000_MANC_EN_MNG2HOST
;
2177 manc2h
= er32(MANC2H
);
2178 #define E1000_MNG2HOST_PORT_623 (1 << 5)
2179 #define E1000_MNG2HOST_PORT_664 (1 << 6)
2180 manc2h
|= E1000_MNG2HOST_PORT_623
;
2181 manc2h
|= E1000_MNG2HOST_PORT_664
;
2182 ew32(MANC2H
, manc2h
);
2187 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
2188 * @adapter: board private structure
2190 * Configure the Tx unit of the MAC after a reset.
2192 static void e1000_configure_tx(struct e1000_adapter
*adapter
)
2194 struct e1000_hw
*hw
= &adapter
->hw
;
2195 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
2197 u32 tdlen
, tctl
, tipg
, tarc
;
2200 /* Setup the HW Tx Head and Tail descriptor pointers */
2201 tdba
= tx_ring
->dma
;
2202 tdlen
= tx_ring
->count
* sizeof(struct e1000_tx_desc
);
2203 ew32(TDBAL
, (tdba
& DMA_BIT_MASK(32)));
2204 ew32(TDBAH
, (tdba
>> 32));
2208 tx_ring
->head
= E1000_TDH
;
2209 tx_ring
->tail
= E1000_TDT
;
2211 /* Set the default values for the Tx Inter Packet Gap timer */
2212 tipg
= DEFAULT_82543_TIPG_IPGT_COPPER
; /* 8 */
2213 ipgr1
= DEFAULT_82543_TIPG_IPGR1
; /* 8 */
2214 ipgr2
= DEFAULT_82543_TIPG_IPGR2
; /* 6 */
2216 if (adapter
->flags
& FLAG_TIPG_MEDIUM_FOR_80003ESLAN
)
2217 ipgr2
= DEFAULT_80003ES2LAN_TIPG_IPGR2
; /* 7 */
2219 tipg
|= ipgr1
<< E1000_TIPG_IPGR1_SHIFT
;
2220 tipg
|= ipgr2
<< E1000_TIPG_IPGR2_SHIFT
;
2223 /* Set the Tx Interrupt Delay register */
2224 ew32(TIDV
, adapter
->tx_int_delay
);
2225 /* Tx irq moderation */
2226 ew32(TADV
, adapter
->tx_abs_int_delay
);
2228 /* Program the Transmit Control Register */
2230 tctl
&= ~E1000_TCTL_CT
;
2231 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
2232 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
2234 if (adapter
->flags
& FLAG_TARC_SPEED_MODE_BIT
) {
2235 tarc
= er32(TARC(0));
2237 * set the speed mode bit, we'll clear it if we're not at
2238 * gigabit link later
2240 #define SPEED_MODE_BIT (1 << 21)
2241 tarc
|= SPEED_MODE_BIT
;
2242 ew32(TARC(0), tarc
);
2245 /* errata: program both queues to unweighted RR */
2246 if (adapter
->flags
& FLAG_TARC_SET_BIT_ZERO
) {
2247 tarc
= er32(TARC(0));
2249 ew32(TARC(0), tarc
);
2250 tarc
= er32(TARC(1));
2252 ew32(TARC(1), tarc
);
2255 /* Setup Transmit Descriptor Settings for eop descriptor */
2256 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_IFCS
;
2258 /* only set IDE if we are delaying interrupts using the timers */
2259 if (adapter
->tx_int_delay
)
2260 adapter
->txd_cmd
|= E1000_TXD_CMD_IDE
;
2262 /* enable Report Status bit */
2263 adapter
->txd_cmd
|= E1000_TXD_CMD_RS
;
2267 e1000e_config_collision_dist(hw
);
2269 adapter
->tx_queue_len
= adapter
->netdev
->tx_queue_len
;
2273 * e1000_setup_rctl - configure the receive control registers
2274 * @adapter: Board private structure
2276 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2277 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2278 static void e1000_setup_rctl(struct e1000_adapter
*adapter
)
2280 struct e1000_hw
*hw
= &adapter
->hw
;
2285 /* Program MC offset vector base */
2287 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
2288 rctl
|= E1000_RCTL_EN
| E1000_RCTL_BAM
|
2289 E1000_RCTL_LBM_NO
| E1000_RCTL_RDMTS_HALF
|
2290 (adapter
->hw
.mac
.mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
2292 /* Do not Store bad packets */
2293 rctl
&= ~E1000_RCTL_SBP
;
2295 /* Enable Long Packet receive */
2296 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
2297 rctl
&= ~E1000_RCTL_LPE
;
2299 rctl
|= E1000_RCTL_LPE
;
2301 /* Some systems expect that the CRC is included in SMBUS traffic. The
2302 * hardware strips the CRC before sending to both SMBUS (BMC) and to
2303 * host memory when this is enabled
2305 if (adapter
->flags2
& FLAG2_CRC_STRIPPING
)
2306 rctl
|= E1000_RCTL_SECRC
;
2308 /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2309 if ((hw
->phy
.type
== e1000_phy_82577
) && (rctl
& E1000_RCTL_LPE
)) {
2312 e1e_rphy(hw
, PHY_REG(770, 26), &phy_data
);
2314 phy_data
|= (1 << 2);
2315 e1e_wphy(hw
, PHY_REG(770, 26), phy_data
);
2317 e1e_rphy(hw
, 22, &phy_data
);
2319 phy_data
|= (1 << 14);
2320 e1e_wphy(hw
, 0x10, 0x2823);
2321 e1e_wphy(hw
, 0x11, 0x0003);
2322 e1e_wphy(hw
, 22, phy_data
);
2325 /* Setup buffer sizes */
2326 rctl
&= ~E1000_RCTL_SZ_4096
;
2327 rctl
|= E1000_RCTL_BSEX
;
2328 switch (adapter
->rx_buffer_len
) {
2330 rctl
|= E1000_RCTL_SZ_256
;
2331 rctl
&= ~E1000_RCTL_BSEX
;
2334 rctl
|= E1000_RCTL_SZ_512
;
2335 rctl
&= ~E1000_RCTL_BSEX
;
2338 rctl
|= E1000_RCTL_SZ_1024
;
2339 rctl
&= ~E1000_RCTL_BSEX
;
2343 rctl
|= E1000_RCTL_SZ_2048
;
2344 rctl
&= ~E1000_RCTL_BSEX
;
2347 rctl
|= E1000_RCTL_SZ_4096
;
2350 rctl
|= E1000_RCTL_SZ_8192
;
2353 rctl
|= E1000_RCTL_SZ_16384
;
2358 * 82571 and greater support packet-split where the protocol
2359 * header is placed in skb->data and the packet data is
2360 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2361 * In the case of a non-split, skb->data is linearly filled,
2362 * followed by the page buffers. Therefore, skb->data is
2363 * sized to hold the largest protocol header.
2365 * allocations using alloc_page take too long for regular MTU
2366 * so only enable packet split for jumbo frames
2368 * Using pages when the page size is greater than 16k wastes
2369 * a lot of memory, since we allocate 3 pages at all times
2372 pages
= PAGE_USE_COUNT(adapter
->netdev
->mtu
);
2373 if (!(adapter
->flags
& FLAG_IS_ICH
) && (pages
<= 3) &&
2374 (PAGE_SIZE
<= 16384) && (rctl
& E1000_RCTL_LPE
))
2375 adapter
->rx_ps_pages
= pages
;
2377 adapter
->rx_ps_pages
= 0;
2379 if (adapter
->rx_ps_pages
) {
2380 /* Configure extra packet-split registers */
2381 rfctl
= er32(RFCTL
);
2382 rfctl
|= E1000_RFCTL_EXTEN
;
2384 * disable packet split support for IPv6 extension headers,
2385 * because some malformed IPv6 headers can hang the Rx
2387 rfctl
|= (E1000_RFCTL_IPV6_EX_DIS
|
2388 E1000_RFCTL_NEW_IPV6_EXT_DIS
);
2392 /* Enable Packet split descriptors */
2393 rctl
|= E1000_RCTL_DTYP_PS
;
2395 psrctl
|= adapter
->rx_ps_bsize0
>>
2396 E1000_PSRCTL_BSIZE0_SHIFT
;
2398 switch (adapter
->rx_ps_pages
) {
2400 psrctl
|= PAGE_SIZE
<<
2401 E1000_PSRCTL_BSIZE3_SHIFT
;
2403 psrctl
|= PAGE_SIZE
<<
2404 E1000_PSRCTL_BSIZE2_SHIFT
;
2406 psrctl
|= PAGE_SIZE
>>
2407 E1000_PSRCTL_BSIZE1_SHIFT
;
2411 ew32(PSRCTL
, psrctl
);
2415 /* just started the receive unit, no need to restart */
2416 adapter
->flags
&= ~FLAG_RX_RESTART_NOW
;
2420 * e1000_configure_rx - Configure Receive Unit after Reset
2421 * @adapter: board private structure
2423 * Configure the Rx unit of the MAC after a reset.
2425 static void e1000_configure_rx(struct e1000_adapter
*adapter
)
2427 struct e1000_hw
*hw
= &adapter
->hw
;
2428 struct e1000_ring
*rx_ring
= adapter
->rx_ring
;
2430 u32 rdlen
, rctl
, rxcsum
, ctrl_ext
;
2432 if (adapter
->rx_ps_pages
) {
2433 /* this is a 32 byte descriptor */
2434 rdlen
= rx_ring
->count
*
2435 sizeof(union e1000_rx_desc_packet_split
);
2436 adapter
->clean_rx
= e1000_clean_rx_irq_ps
;
2437 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers_ps
;
2438 } else if (adapter
->netdev
->mtu
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
2439 rdlen
= rx_ring
->count
* sizeof(struct e1000_rx_desc
);
2440 adapter
->clean_rx
= e1000_clean_jumbo_rx_irq
;
2441 adapter
->alloc_rx_buf
= e1000_alloc_jumbo_rx_buffers
;
2443 rdlen
= rx_ring
->count
* sizeof(struct e1000_rx_desc
);
2444 adapter
->clean_rx
= e1000_clean_rx_irq
;
2445 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers
;
2448 /* disable receives while setting up the descriptors */
2450 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
2454 /* set the Receive Delay Timer Register */
2455 ew32(RDTR
, adapter
->rx_int_delay
);
2457 /* irq moderation */
2458 ew32(RADV
, adapter
->rx_abs_int_delay
);
2459 if (adapter
->itr_setting
!= 0)
2460 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
2462 ctrl_ext
= er32(CTRL_EXT
);
2463 /* Auto-Mask interrupts upon ICR access */
2464 ctrl_ext
|= E1000_CTRL_EXT_IAME
;
2465 ew32(IAM
, 0xffffffff);
2466 ew32(CTRL_EXT
, ctrl_ext
);
2470 * Setup the HW Rx Head and Tail Descriptor Pointers and
2471 * the Base and Length of the Rx Descriptor Ring
2473 rdba
= rx_ring
->dma
;
2474 ew32(RDBAL
, (rdba
& DMA_BIT_MASK(32)));
2475 ew32(RDBAH
, (rdba
>> 32));
2479 rx_ring
->head
= E1000_RDH
;
2480 rx_ring
->tail
= E1000_RDT
;
2482 /* Enable Receive Checksum Offload for TCP and UDP */
2483 rxcsum
= er32(RXCSUM
);
2484 if (adapter
->flags
& FLAG_RX_CSUM_ENABLED
) {
2485 rxcsum
|= E1000_RXCSUM_TUOFL
;
2488 * IPv4 payload checksum for UDP fragments must be
2489 * used in conjunction with packet-split.
2491 if (adapter
->rx_ps_pages
)
2492 rxcsum
|= E1000_RXCSUM_IPPCSE
;
2494 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
2495 /* no need to clear IPPCSE as it defaults to 0 */
2497 ew32(RXCSUM
, rxcsum
);
2500 * Enable early receives on supported devices, only takes effect when
2501 * packet size is equal or larger than the specified value (in 8 byte
2502 * units), e.g. using jumbo frames when setting to E1000_ERT_2048
2504 if (adapter
->flags
& FLAG_HAS_ERT
) {
2505 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
2506 u32 rxdctl
= er32(RXDCTL(0));
2507 ew32(RXDCTL(0), rxdctl
| 0x3);
2508 ew32(ERT
, E1000_ERT_2048
| (1 << 13));
2510 * With jumbo frames and early-receive enabled,
2511 * excessive C-state transition latencies result in
2512 * dropped transactions.
2514 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY
,
2515 adapter
->netdev
->name
, 55);
2517 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY
,
2518 adapter
->netdev
->name
,
2519 PM_QOS_DEFAULT_VALUE
);
2523 /* Enable Receives */
2528 * e1000_update_mc_addr_list - Update Multicast addresses
2529 * @hw: pointer to the HW structure
2530 * @mc_addr_list: array of multicast addresses to program
2531 * @mc_addr_count: number of multicast addresses to program
2532 * @rar_used_count: the first RAR register free to program
2533 * @rar_count: total number of supported Receive Address Registers
2535 * Updates the Receive Address Registers and Multicast Table Array.
2536 * The caller must have a packed mc_addr_list of multicast addresses.
2537 * The parameter rar_count will usually be hw->mac.rar_entry_count
2538 * unless there are workarounds that change this. Currently no func pointer
2539 * exists and all implementations are handled in the generic version of this
2542 static void e1000_update_mc_addr_list(struct e1000_hw
*hw
, u8
*mc_addr_list
,
2543 u32 mc_addr_count
, u32 rar_used_count
,
2546 hw
->mac
.ops
.update_mc_addr_list(hw
, mc_addr_list
, mc_addr_count
,
2547 rar_used_count
, rar_count
);
2551 * e1000_set_multi - Multicast and Promiscuous mode set
2552 * @netdev: network interface device structure
2554 * The set_multi entry point is called whenever the multicast address
2555 * list or the network interface flags are updated. This routine is
2556 * responsible for configuring the hardware for proper multicast,
2557 * promiscuous mode, and all-multi behavior.
2559 static void e1000_set_multi(struct net_device
*netdev
)
2561 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2562 struct e1000_hw
*hw
= &adapter
->hw
;
2563 struct e1000_mac_info
*mac
= &hw
->mac
;
2564 struct dev_mc_list
*mc_ptr
;
2569 /* Check for Promiscuous and All Multicast modes */
2573 if (netdev
->flags
& IFF_PROMISC
) {
2574 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2575 rctl
&= ~E1000_RCTL_VFE
;
2577 if (netdev
->flags
& IFF_ALLMULTI
) {
2578 rctl
|= E1000_RCTL_MPE
;
2579 rctl
&= ~E1000_RCTL_UPE
;
2581 rctl
&= ~(E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2583 if (adapter
->flags
& FLAG_HAS_HW_VLAN_FILTER
)
2584 rctl
|= E1000_RCTL_VFE
;
2589 if (netdev
->mc_count
) {
2590 mta_list
= kmalloc(netdev
->mc_count
* 6, GFP_ATOMIC
);
2594 /* prepare a packed array of only addresses. */
2595 mc_ptr
= netdev
->mc_list
;
2597 for (i
= 0; i
< netdev
->mc_count
; i
++) {
2600 memcpy(mta_list
+ (i
*ETH_ALEN
), mc_ptr
->dmi_addr
,
2602 mc_ptr
= mc_ptr
->next
;
2605 e1000_update_mc_addr_list(hw
, mta_list
, i
, 1,
2606 mac
->rar_entry_count
);
2610 * if we're called from probe, we might not have
2611 * anything to do here, so clear out the list
2613 e1000_update_mc_addr_list(hw
, NULL
, 0, 1, mac
->rar_entry_count
);
2618 * e1000_configure - configure the hardware for Rx and Tx
2619 * @adapter: private board structure
2621 static void e1000_configure(struct e1000_adapter
*adapter
)
2623 e1000_set_multi(adapter
->netdev
);
2625 e1000_restore_vlan(adapter
);
2626 e1000_init_manageability(adapter
);
2628 e1000_configure_tx(adapter
);
2629 e1000_setup_rctl(adapter
);
2630 e1000_configure_rx(adapter
);
2631 adapter
->alloc_rx_buf(adapter
, e1000_desc_unused(adapter
->rx_ring
));
2635 * e1000e_power_up_phy - restore link in case the phy was powered down
2636 * @adapter: address of board private structure
2638 * The phy may be powered down to save power and turn off link when the
2639 * driver is unloaded and wake on lan is not enabled (among others)
2640 * *** this routine MUST be followed by a call to e1000e_reset ***
2642 void e1000e_power_up_phy(struct e1000_adapter
*adapter
)
2644 if (adapter
->hw
.phy
.ops
.power_up
)
2645 adapter
->hw
.phy
.ops
.power_up(&adapter
->hw
);
2647 adapter
->hw
.mac
.ops
.setup_link(&adapter
->hw
);
2651 * e1000_power_down_phy - Power down the PHY
2653 * Power down the PHY so no link is implied when interface is down.
2654 * The PHY cannot be powered down if management or WoL is active.
2656 static void e1000_power_down_phy(struct e1000_adapter
*adapter
)
2658 /* WoL is enabled */
2662 if (adapter
->hw
.phy
.ops
.power_down
)
2663 adapter
->hw
.phy
.ops
.power_down(&adapter
->hw
);
2667 * e1000e_reset - bring the hardware into a known good state
2669 * This function boots the hardware and enables some settings that
2670 * require a configuration cycle of the hardware - those cannot be
2671 * set/changed during runtime. After reset the device needs to be
2672 * properly configured for Rx, Tx etc.
2674 void e1000e_reset(struct e1000_adapter
*adapter
)
2676 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
2677 struct e1000_fc_info
*fc
= &adapter
->hw
.fc
;
2678 struct e1000_hw
*hw
= &adapter
->hw
;
2679 u32 tx_space
, min_tx_space
, min_rx_space
;
2680 u32 pba
= adapter
->pba
;
2683 /* reset Packet Buffer Allocation to default */
2686 if (adapter
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
2688 * To maintain wire speed transmits, the Tx FIFO should be
2689 * large enough to accommodate two full transmit packets,
2690 * rounded up to the next 1KB and expressed in KB. Likewise,
2691 * the Rx FIFO should be large enough to accommodate at least
2692 * one full receive packet and is similarly rounded up and
2696 /* upper 16 bits has Tx packet buffer allocation size in KB */
2697 tx_space
= pba
>> 16;
2698 /* lower 16 bits has Rx packet buffer allocation size in KB */
2701 * the Tx fifo also stores 16 bytes of information about the tx
2702 * but don't include ethernet FCS because hardware appends it
2704 min_tx_space
= (adapter
->max_frame_size
+
2705 sizeof(struct e1000_tx_desc
) -
2707 min_tx_space
= ALIGN(min_tx_space
, 1024);
2708 min_tx_space
>>= 10;
2709 /* software strips receive CRC, so leave room for it */
2710 min_rx_space
= adapter
->max_frame_size
;
2711 min_rx_space
= ALIGN(min_rx_space
, 1024);
2712 min_rx_space
>>= 10;
2715 * If current Tx allocation is less than the min Tx FIFO size,
2716 * and the min Tx FIFO size is less than the current Rx FIFO
2717 * allocation, take space away from current Rx allocation
2719 if ((tx_space
< min_tx_space
) &&
2720 ((min_tx_space
- tx_space
) < pba
)) {
2721 pba
-= min_tx_space
- tx_space
;
2724 * if short on Rx space, Rx wins and must trump tx
2725 * adjustment or use Early Receive if available
2727 if ((pba
< min_rx_space
) &&
2728 (!(adapter
->flags
& FLAG_HAS_ERT
)))
2729 /* ERT enabled in e1000_configure_rx */
2738 * flow control settings
2740 * The high water mark must be low enough to fit one full frame
2741 * (or the size used for early receive) above it in the Rx FIFO.
2742 * Set it to the lower of:
2743 * - 90% of the Rx FIFO size, and
2744 * - the full Rx FIFO size minus the early receive size (for parts
2745 * with ERT support assuming ERT set to E1000_ERT_2048), or
2746 * - the full Rx FIFO size minus one full frame
2748 if (hw
->mac
.type
== e1000_pchlan
) {
2750 * Workaround PCH LOM adapter hangs with certain network
2751 * loads. If hangs persist, try disabling Tx flow control.
2753 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
2754 fc
->high_water
= 0x3500;
2755 fc
->low_water
= 0x1500;
2757 fc
->high_water
= 0x5000;
2758 fc
->low_water
= 0x3000;
2761 if ((adapter
->flags
& FLAG_HAS_ERT
) &&
2762 (adapter
->netdev
->mtu
> ETH_DATA_LEN
))
2763 hwm
= min(((pba
<< 10) * 9 / 10),
2764 ((pba
<< 10) - (E1000_ERT_2048
<< 3)));
2766 hwm
= min(((pba
<< 10) * 9 / 10),
2767 ((pba
<< 10) - adapter
->max_frame_size
));
2769 fc
->high_water
= hwm
& E1000_FCRTH_RTH
; /* 8-byte granularity */
2770 fc
->low_water
= fc
->high_water
- 8;
2773 if (adapter
->flags
& FLAG_DISABLE_FC_PAUSE_TIME
)
2774 fc
->pause_time
= 0xFFFF;
2776 fc
->pause_time
= E1000_FC_PAUSE_TIME
;
2778 fc
->current_mode
= fc
->requested_mode
;
2780 /* Allow time for pending master requests to run */
2781 mac
->ops
.reset_hw(hw
);
2784 * For parts with AMT enabled, let the firmware know
2785 * that the network interface is in control
2787 if (adapter
->flags
& FLAG_HAS_AMT
)
2788 e1000_get_hw_control(adapter
);
2791 if (adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
)
2792 e1e_wphy(&adapter
->hw
, BM_WUC
, 0);
2794 if (mac
->ops
.init_hw(hw
))
2795 e_err("Hardware Error\n");
2797 /* additional part of the flow-control workaround above */
2798 if (hw
->mac
.type
== e1000_pchlan
)
2799 ew32(FCRTV_PCH
, 0x1000);
2801 e1000_update_mng_vlan(adapter
);
2803 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
2804 ew32(VET
, ETH_P_8021Q
);
2806 e1000e_reset_adaptive(hw
);
2807 e1000_get_phy_info(hw
);
2809 if ((adapter
->flags
& FLAG_HAS_SMART_POWER_DOWN
) &&
2810 !(adapter
->flags
& FLAG_SMART_POWER_DOWN
)) {
2813 * speed up time to link by disabling smart power down, ignore
2814 * the return value of this function because there is nothing
2815 * different we would do if it failed
2817 e1e_rphy(hw
, IGP02E1000_PHY_POWER_MGMT
, &phy_data
);
2818 phy_data
&= ~IGP02E1000_PM_SPD
;
2819 e1e_wphy(hw
, IGP02E1000_PHY_POWER_MGMT
, phy_data
);
2823 int e1000e_up(struct e1000_adapter
*adapter
)
2825 struct e1000_hw
*hw
= &adapter
->hw
;
2827 /* DMA latency requirement to workaround early-receive/jumbo issue */
2828 if (adapter
->flags
& FLAG_HAS_ERT
)
2829 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY
,
2830 adapter
->netdev
->name
,
2831 PM_QOS_DEFAULT_VALUE
);
2833 /* hardware has been reset, we need to reload some things */
2834 e1000_configure(adapter
);
2836 clear_bit(__E1000_DOWN
, &adapter
->state
);
2838 napi_enable(&adapter
->napi
);
2839 if (adapter
->msix_entries
)
2840 e1000_configure_msix(adapter
);
2841 e1000_irq_enable(adapter
);
2843 netif_wake_queue(adapter
->netdev
);
2845 /* fire a link change interrupt to start the watchdog */
2846 ew32(ICS
, E1000_ICS_LSC
);
2850 void e1000e_down(struct e1000_adapter
*adapter
)
2852 struct net_device
*netdev
= adapter
->netdev
;
2853 struct e1000_hw
*hw
= &adapter
->hw
;
2857 * signal that we're down so the interrupt handler does not
2858 * reschedule our watchdog timer
2860 set_bit(__E1000_DOWN
, &adapter
->state
);
2862 /* disable receives in the hardware */
2864 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
2865 /* flush and sleep below */
2867 netif_stop_queue(netdev
);
2869 /* disable transmits in the hardware */
2871 tctl
&= ~E1000_TCTL_EN
;
2873 /* flush both disables and wait for them to finish */
2877 napi_disable(&adapter
->napi
);
2878 e1000_irq_disable(adapter
);
2880 del_timer_sync(&adapter
->watchdog_timer
);
2881 del_timer_sync(&adapter
->phy_info_timer
);
2883 netdev
->tx_queue_len
= adapter
->tx_queue_len
;
2884 netif_carrier_off(netdev
);
2885 adapter
->link_speed
= 0;
2886 adapter
->link_duplex
= 0;
2888 if (!pci_channel_offline(adapter
->pdev
))
2889 e1000e_reset(adapter
);
2890 e1000_clean_tx_ring(adapter
);
2891 e1000_clean_rx_ring(adapter
);
2893 if (adapter
->flags
& FLAG_HAS_ERT
)
2894 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY
,
2895 adapter
->netdev
->name
);
2898 * TODO: for power management, we could drop the link and
2899 * pci_disable_device here.
2903 void e1000e_reinit_locked(struct e1000_adapter
*adapter
)
2906 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->state
))
2908 e1000e_down(adapter
);
2910 clear_bit(__E1000_RESETTING
, &adapter
->state
);
2914 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
2915 * @adapter: board private structure to initialize
2917 * e1000_sw_init initializes the Adapter private data structure.
2918 * Fields are initialized based on PCI device information and
2919 * OS network device settings (MTU size).
2921 static int __devinit
e1000_sw_init(struct e1000_adapter
*adapter
)
2923 struct net_device
*netdev
= adapter
->netdev
;
2925 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
;
2926 adapter
->rx_ps_bsize0
= 128;
2927 adapter
->max_frame_size
= netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
2928 adapter
->min_frame_size
= ETH_ZLEN
+ ETH_FCS_LEN
;
2930 e1000e_set_interrupt_capability(adapter
);
2932 if (e1000_alloc_queues(adapter
))
2935 /* Explicitly disable IRQ since the NIC can be in any state. */
2936 e1000_irq_disable(adapter
);
2938 set_bit(__E1000_DOWN
, &adapter
->state
);
2943 * e1000_intr_msi_test - Interrupt Handler
2944 * @irq: interrupt number
2945 * @data: pointer to a network interface device structure
2947 static irqreturn_t
e1000_intr_msi_test(int irq
, void *data
)
2949 struct net_device
*netdev
= data
;
2950 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2951 struct e1000_hw
*hw
= &adapter
->hw
;
2952 u32 icr
= er32(ICR
);
2954 e_dbg("icr is %08X\n", icr
);
2955 if (icr
& E1000_ICR_RXSEQ
) {
2956 adapter
->flags
&= ~FLAG_MSI_TEST_FAILED
;
2964 * e1000_test_msi_interrupt - Returns 0 for successful test
2965 * @adapter: board private struct
2967 * code flow taken from tg3.c
2969 static int e1000_test_msi_interrupt(struct e1000_adapter
*adapter
)
2971 struct net_device
*netdev
= adapter
->netdev
;
2972 struct e1000_hw
*hw
= &adapter
->hw
;
2975 /* poll_enable hasn't been called yet, so don't need disable */
2976 /* clear any pending events */
2979 /* free the real vector and request a test handler */
2980 e1000_free_irq(adapter
);
2981 e1000e_reset_interrupt_capability(adapter
);
2983 /* Assume that the test fails, if it succeeds then the test
2984 * MSI irq handler will unset this flag */
2985 adapter
->flags
|= FLAG_MSI_TEST_FAILED
;
2987 err
= pci_enable_msi(adapter
->pdev
);
2989 goto msi_test_failed
;
2991 err
= request_irq(adapter
->pdev
->irq
, e1000_intr_msi_test
, 0,
2992 netdev
->name
, netdev
);
2994 pci_disable_msi(adapter
->pdev
);
2995 goto msi_test_failed
;
3000 e1000_irq_enable(adapter
);
3002 /* fire an unusual interrupt on the test handler */
3003 ew32(ICS
, E1000_ICS_RXSEQ
);
3007 e1000_irq_disable(adapter
);
3011 if (adapter
->flags
& FLAG_MSI_TEST_FAILED
) {
3012 adapter
->int_mode
= E1000E_INT_MODE_LEGACY
;
3014 e_info("MSI interrupt test failed!\n");
3017 free_irq(adapter
->pdev
->irq
, netdev
);
3018 pci_disable_msi(adapter
->pdev
);
3021 goto msi_test_failed
;
3023 /* okay so the test worked, restore settings */
3024 e_dbg("MSI interrupt test succeeded!\n");
3026 e1000e_set_interrupt_capability(adapter
);
3027 e1000_request_irq(adapter
);
3032 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3033 * @adapter: board private struct
3035 * code flow taken from tg3.c, called with e1000 interrupts disabled.
3037 static int e1000_test_msi(struct e1000_adapter
*adapter
)
3042 if (!(adapter
->flags
& FLAG_MSI_ENABLED
))
3045 /* disable SERR in case the MSI write causes a master abort */
3046 pci_read_config_word(adapter
->pdev
, PCI_COMMAND
, &pci_cmd
);
3047 pci_write_config_word(adapter
->pdev
, PCI_COMMAND
,
3048 pci_cmd
& ~PCI_COMMAND_SERR
);
3050 err
= e1000_test_msi_interrupt(adapter
);
3052 /* restore previous setting of command word */
3053 pci_write_config_word(adapter
->pdev
, PCI_COMMAND
, pci_cmd
);
3059 /* EIO means MSI test failed */
3063 /* back to INTx mode */
3064 e_warn("MSI interrupt test failed, using legacy interrupt.\n");
3066 e1000_free_irq(adapter
);
3068 err
= e1000_request_irq(adapter
);
3074 * e1000_open - Called when a network interface is made active
3075 * @netdev: network interface device structure
3077 * Returns 0 on success, negative value on failure
3079 * The open entry point is called when a network interface is made
3080 * active by the system (IFF_UP). At this point all resources needed
3081 * for transmit and receive operations are allocated, the interrupt
3082 * handler is registered with the OS, the watchdog timer is started,
3083 * and the stack is notified that the interface is ready.
3085 static int e1000_open(struct net_device
*netdev
)
3087 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3088 struct e1000_hw
*hw
= &adapter
->hw
;
3091 /* disallow open during test */
3092 if (test_bit(__E1000_TESTING
, &adapter
->state
))
3095 netif_carrier_off(netdev
);
3097 /* allocate transmit descriptors */
3098 err
= e1000e_setup_tx_resources(adapter
);
3102 /* allocate receive descriptors */
3103 err
= e1000e_setup_rx_resources(adapter
);
3107 e1000e_power_up_phy(adapter
);
3109 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
3110 if ((adapter
->hw
.mng_cookie
.status
&
3111 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
))
3112 e1000_update_mng_vlan(adapter
);
3115 * If AMT is enabled, let the firmware know that the network
3116 * interface is now open
3118 if (adapter
->flags
& FLAG_HAS_AMT
)
3119 e1000_get_hw_control(adapter
);
3122 * before we allocate an interrupt, we must be ready to handle it.
3123 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3124 * as soon as we call pci_request_irq, so we have to setup our
3125 * clean_rx handler before we do so.
3127 e1000_configure(adapter
);
3129 err
= e1000_request_irq(adapter
);
3134 * Work around PCIe errata with MSI interrupts causing some chipsets to
3135 * ignore e1000e MSI messages, which means we need to test our MSI
3138 if (adapter
->int_mode
!= E1000E_INT_MODE_LEGACY
) {
3139 err
= e1000_test_msi(adapter
);
3141 e_err("Interrupt allocation failed\n");
3146 /* From here on the code is the same as e1000e_up() */
3147 clear_bit(__E1000_DOWN
, &adapter
->state
);
3149 napi_enable(&adapter
->napi
);
3151 e1000_irq_enable(adapter
);
3153 netif_start_queue(netdev
);
3155 /* fire a link status change interrupt to start the watchdog */
3156 ew32(ICS
, E1000_ICS_LSC
);
3161 e1000_release_hw_control(adapter
);
3162 e1000_power_down_phy(adapter
);
3163 e1000e_free_rx_resources(adapter
);
3165 e1000e_free_tx_resources(adapter
);
3167 e1000e_reset(adapter
);
3173 * e1000_close - Disables a network interface
3174 * @netdev: network interface device structure
3176 * Returns 0, this is not allowed to fail
3178 * The close entry point is called when an interface is de-activated
3179 * by the OS. The hardware is still under the drivers control, but
3180 * needs to be disabled. A global MAC reset is issued to stop the
3181 * hardware, and all transmit and receive resources are freed.
3183 static int e1000_close(struct net_device
*netdev
)
3185 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3187 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->state
));
3188 e1000e_down(adapter
);
3189 e1000_power_down_phy(adapter
);
3190 e1000_free_irq(adapter
);
3192 e1000e_free_tx_resources(adapter
);
3193 e1000e_free_rx_resources(adapter
);
3196 * kill manageability vlan ID if supported, but not if a vlan with
3197 * the same ID is registered on the host OS (let 8021q kill it)
3199 if ((adapter
->hw
.mng_cookie
.status
&
3200 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
) &&
3202 vlan_group_get_device(adapter
->vlgrp
, adapter
->mng_vlan_id
)))
3203 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
3206 * If AMT is enabled, let the firmware know that the network
3207 * interface is now closed
3209 if (adapter
->flags
& FLAG_HAS_AMT
)
3210 e1000_release_hw_control(adapter
);
3215 * e1000_set_mac - Change the Ethernet Address of the NIC
3216 * @netdev: network interface device structure
3217 * @p: pointer to an address structure
3219 * Returns 0 on success, negative on failure
3221 static int e1000_set_mac(struct net_device
*netdev
, void *p
)
3223 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3224 struct sockaddr
*addr
= p
;
3226 if (!is_valid_ether_addr(addr
->sa_data
))
3227 return -EADDRNOTAVAIL
;
3229 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
3230 memcpy(adapter
->hw
.mac
.addr
, addr
->sa_data
, netdev
->addr_len
);
3232 e1000e_rar_set(&adapter
->hw
, adapter
->hw
.mac
.addr
, 0);
3234 if (adapter
->flags
& FLAG_RESET_OVERWRITES_LAA
) {
3235 /* activate the work around */
3236 e1000e_set_laa_state_82571(&adapter
->hw
, 1);
3239 * Hold a copy of the LAA in RAR[14] This is done so that
3240 * between the time RAR[0] gets clobbered and the time it
3241 * gets fixed (in e1000_watchdog), the actual LAA is in one
3242 * of the RARs and no incoming packets directed to this port
3243 * are dropped. Eventually the LAA will be in RAR[0] and
3246 e1000e_rar_set(&adapter
->hw
,
3247 adapter
->hw
.mac
.addr
,
3248 adapter
->hw
.mac
.rar_entry_count
- 1);
3255 * e1000e_update_phy_task - work thread to update phy
3256 * @work: pointer to our work struct
3258 * this worker thread exists because we must acquire a
3259 * semaphore to read the phy, which we could msleep while
3260 * waiting for it, and we can't msleep in a timer.
3262 static void e1000e_update_phy_task(struct work_struct
*work
)
3264 struct e1000_adapter
*adapter
= container_of(work
,
3265 struct e1000_adapter
, update_phy_task
);
3266 e1000_get_phy_info(&adapter
->hw
);
3270 * Need to wait a few seconds after link up to get diagnostic information from
3273 static void e1000_update_phy_info(unsigned long data
)
3275 struct e1000_adapter
*adapter
= (struct e1000_adapter
*) data
;
3276 schedule_work(&adapter
->update_phy_task
);
3280 * e1000e_update_stats - Update the board statistics counters
3281 * @adapter: board private structure
3283 void e1000e_update_stats(struct e1000_adapter
*adapter
)
3285 struct net_device
*netdev
= adapter
->netdev
;
3286 struct e1000_hw
*hw
= &adapter
->hw
;
3287 struct pci_dev
*pdev
= adapter
->pdev
;
3291 * Prevent stats update while adapter is being reset, or if the pci
3292 * connection is down.
3294 if (adapter
->link_speed
== 0)
3296 if (pci_channel_offline(pdev
))
3299 adapter
->stats
.crcerrs
+= er32(CRCERRS
);
3300 adapter
->stats
.gprc
+= er32(GPRC
);
3301 adapter
->stats
.gorc
+= er32(GORCL
);
3302 er32(GORCH
); /* Clear gorc */
3303 adapter
->stats
.bprc
+= er32(BPRC
);
3304 adapter
->stats
.mprc
+= er32(MPRC
);
3305 adapter
->stats
.roc
+= er32(ROC
);
3307 adapter
->stats
.mpc
+= er32(MPC
);
3308 if ((hw
->phy
.type
== e1000_phy_82578
) ||
3309 (hw
->phy
.type
== e1000_phy_82577
)) {
3310 e1e_rphy(hw
, HV_SCC_UPPER
, &phy_data
);
3311 e1e_rphy(hw
, HV_SCC_LOWER
, &phy_data
);
3312 adapter
->stats
.scc
+= phy_data
;
3314 e1e_rphy(hw
, HV_ECOL_UPPER
, &phy_data
);
3315 e1e_rphy(hw
, HV_ECOL_LOWER
, &phy_data
);
3316 adapter
->stats
.ecol
+= phy_data
;
3318 e1e_rphy(hw
, HV_MCC_UPPER
, &phy_data
);
3319 e1e_rphy(hw
, HV_MCC_LOWER
, &phy_data
);
3320 adapter
->stats
.mcc
+= phy_data
;
3322 e1e_rphy(hw
, HV_LATECOL_UPPER
, &phy_data
);
3323 e1e_rphy(hw
, HV_LATECOL_LOWER
, &phy_data
);
3324 adapter
->stats
.latecol
+= phy_data
;
3326 e1e_rphy(hw
, HV_DC_UPPER
, &phy_data
);
3327 e1e_rphy(hw
, HV_DC_LOWER
, &phy_data
);
3328 adapter
->stats
.dc
+= phy_data
;
3330 adapter
->stats
.scc
+= er32(SCC
);
3331 adapter
->stats
.ecol
+= er32(ECOL
);
3332 adapter
->stats
.mcc
+= er32(MCC
);
3333 adapter
->stats
.latecol
+= er32(LATECOL
);
3334 adapter
->stats
.dc
+= er32(DC
);
3336 adapter
->stats
.xonrxc
+= er32(XONRXC
);
3337 adapter
->stats
.xontxc
+= er32(XONTXC
);
3338 adapter
->stats
.xoffrxc
+= er32(XOFFRXC
);
3339 adapter
->stats
.xofftxc
+= er32(XOFFTXC
);
3340 adapter
->stats
.gptc
+= er32(GPTC
);
3341 adapter
->stats
.gotc
+= er32(GOTCL
);
3342 er32(GOTCH
); /* Clear gotc */
3343 adapter
->stats
.rnbc
+= er32(RNBC
);
3344 adapter
->stats
.ruc
+= er32(RUC
);
3346 adapter
->stats
.mptc
+= er32(MPTC
);
3347 adapter
->stats
.bptc
+= er32(BPTC
);
3349 /* used for adaptive IFS */
3351 hw
->mac
.tx_packet_delta
= er32(TPT
);
3352 adapter
->stats
.tpt
+= hw
->mac
.tx_packet_delta
;
3353 if ((hw
->phy
.type
== e1000_phy_82578
) ||
3354 (hw
->phy
.type
== e1000_phy_82577
)) {
3355 e1e_rphy(hw
, HV_COLC_UPPER
, &phy_data
);
3356 e1e_rphy(hw
, HV_COLC_LOWER
, &phy_data
);
3357 hw
->mac
.collision_delta
= phy_data
;
3359 hw
->mac
.collision_delta
= er32(COLC
);
3361 adapter
->stats
.colc
+= hw
->mac
.collision_delta
;
3363 adapter
->stats
.algnerrc
+= er32(ALGNERRC
);
3364 adapter
->stats
.rxerrc
+= er32(RXERRC
);
3365 if ((hw
->phy
.type
== e1000_phy_82578
) ||
3366 (hw
->phy
.type
== e1000_phy_82577
)) {
3367 e1e_rphy(hw
, HV_TNCRS_UPPER
, &phy_data
);
3368 e1e_rphy(hw
, HV_TNCRS_LOWER
, &phy_data
);
3369 adapter
->stats
.tncrs
+= phy_data
;
3371 if ((hw
->mac
.type
!= e1000_82574
) &&
3372 (hw
->mac
.type
!= e1000_82583
))
3373 adapter
->stats
.tncrs
+= er32(TNCRS
);
3375 adapter
->stats
.cexterr
+= er32(CEXTERR
);
3376 adapter
->stats
.tsctc
+= er32(TSCTC
);
3377 adapter
->stats
.tsctfc
+= er32(TSCTFC
);
3379 /* Fill out the OS statistics structure */
3380 netdev
->stats
.multicast
= adapter
->stats
.mprc
;
3381 netdev
->stats
.collisions
= adapter
->stats
.colc
;
3386 * RLEC on some newer hardware can be incorrect so build
3387 * our own version based on RUC and ROC
3389 netdev
->stats
.rx_errors
= adapter
->stats
.rxerrc
+
3390 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3391 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3392 adapter
->stats
.cexterr
;
3393 netdev
->stats
.rx_length_errors
= adapter
->stats
.ruc
+
3395 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3396 netdev
->stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3397 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3400 netdev
->stats
.tx_errors
= adapter
->stats
.ecol
+
3401 adapter
->stats
.latecol
;
3402 netdev
->stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3403 netdev
->stats
.tx_window_errors
= adapter
->stats
.latecol
;
3404 netdev
->stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3406 /* Tx Dropped needs to be maintained elsewhere */
3408 /* Management Stats */
3409 adapter
->stats
.mgptc
+= er32(MGTPTC
);
3410 adapter
->stats
.mgprc
+= er32(MGTPRC
);
3411 adapter
->stats
.mgpdc
+= er32(MGTPDC
);
3415 * e1000_phy_read_status - Update the PHY register status snapshot
3416 * @adapter: board private structure
3418 static void e1000_phy_read_status(struct e1000_adapter
*adapter
)
3420 struct e1000_hw
*hw
= &adapter
->hw
;
3421 struct e1000_phy_regs
*phy
= &adapter
->phy_regs
;
3424 if ((er32(STATUS
) & E1000_STATUS_LU
) &&
3425 (adapter
->hw
.phy
.media_type
== e1000_media_type_copper
)) {
3426 ret_val
= e1e_rphy(hw
, PHY_CONTROL
, &phy
->bmcr
);
3427 ret_val
|= e1e_rphy(hw
, PHY_STATUS
, &phy
->bmsr
);
3428 ret_val
|= e1e_rphy(hw
, PHY_AUTONEG_ADV
, &phy
->advertise
);
3429 ret_val
|= e1e_rphy(hw
, PHY_LP_ABILITY
, &phy
->lpa
);
3430 ret_val
|= e1e_rphy(hw
, PHY_AUTONEG_EXP
, &phy
->expansion
);
3431 ret_val
|= e1e_rphy(hw
, PHY_1000T_CTRL
, &phy
->ctrl1000
);
3432 ret_val
|= e1e_rphy(hw
, PHY_1000T_STATUS
, &phy
->stat1000
);
3433 ret_val
|= e1e_rphy(hw
, PHY_EXT_STATUS
, &phy
->estatus
);
3435 e_warn("Error reading PHY register\n");
3438 * Do not read PHY registers if link is not up
3439 * Set values to typical power-on defaults
3441 phy
->bmcr
= (BMCR_SPEED1000
| BMCR_ANENABLE
| BMCR_FULLDPLX
);
3442 phy
->bmsr
= (BMSR_100FULL
| BMSR_100HALF
| BMSR_10FULL
|
3443 BMSR_10HALF
| BMSR_ESTATEN
| BMSR_ANEGCAPABLE
|
3445 phy
->advertise
= (ADVERTISE_PAUSE_ASYM
| ADVERTISE_PAUSE_CAP
|
3446 ADVERTISE_ALL
| ADVERTISE_CSMA
);
3448 phy
->expansion
= EXPANSION_ENABLENPAGE
;
3449 phy
->ctrl1000
= ADVERTISE_1000FULL
;
3451 phy
->estatus
= (ESTATUS_1000_TFULL
| ESTATUS_1000_THALF
);
3455 static void e1000_print_link_info(struct e1000_adapter
*adapter
)
3457 struct e1000_hw
*hw
= &adapter
->hw
;
3458 u32 ctrl
= er32(CTRL
);
3460 /* Link status message must follow this format for user tools */
3461 printk(KERN_INFO
"e1000e: %s NIC Link is Up %d Mbps %s, "
3462 "Flow Control: %s\n",
3463 adapter
->netdev
->name
,
3464 adapter
->link_speed
,
3465 (adapter
->link_duplex
== FULL_DUPLEX
) ?
3466 "Full Duplex" : "Half Duplex",
3467 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
& E1000_CTRL_RFCE
)) ?
3469 ((ctrl
& E1000_CTRL_RFCE
) ? "RX" :
3470 ((ctrl
& E1000_CTRL_TFCE
) ? "TX" : "None" )));
3473 bool e1000_has_link(struct e1000_adapter
*adapter
)
3475 struct e1000_hw
*hw
= &adapter
->hw
;
3476 bool link_active
= 0;
3480 * get_link_status is set on LSC (link status) interrupt or
3481 * Rx sequence error interrupt. get_link_status will stay
3482 * false until the check_for_link establishes link
3483 * for copper adapters ONLY
3485 switch (hw
->phy
.media_type
) {
3486 case e1000_media_type_copper
:
3487 if (hw
->mac
.get_link_status
) {
3488 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
3489 link_active
= !hw
->mac
.get_link_status
;
3494 case e1000_media_type_fiber
:
3495 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
3496 link_active
= !!(er32(STATUS
) & E1000_STATUS_LU
);
3498 case e1000_media_type_internal_serdes
:
3499 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
3500 link_active
= adapter
->hw
.mac
.serdes_has_link
;
3503 case e1000_media_type_unknown
:
3507 if ((ret_val
== E1000_ERR_PHY
) && (hw
->phy
.type
== e1000_phy_igp_3
) &&
3508 (er32(CTRL
) & E1000_PHY_CTRL_GBE_DISABLE
)) {
3509 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
3510 e_info("Gigabit has been disabled, downgrading speed\n");
3516 static void e1000e_enable_receives(struct e1000_adapter
*adapter
)
3518 /* make sure the receive unit is started */
3519 if ((adapter
->flags
& FLAG_RX_NEEDS_RESTART
) &&
3520 (adapter
->flags
& FLAG_RX_RESTART_NOW
)) {
3521 struct e1000_hw
*hw
= &adapter
->hw
;
3522 u32 rctl
= er32(RCTL
);
3523 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
3524 adapter
->flags
&= ~FLAG_RX_RESTART_NOW
;
3529 * e1000_watchdog - Timer Call-back
3530 * @data: pointer to adapter cast into an unsigned long
3532 static void e1000_watchdog(unsigned long data
)
3534 struct e1000_adapter
*adapter
= (struct e1000_adapter
*) data
;
3536 /* Do the rest outside of interrupt context */
3537 schedule_work(&adapter
->watchdog_task
);
3539 /* TODO: make this use queue_delayed_work() */
3542 static void e1000_watchdog_task(struct work_struct
*work
)
3544 struct e1000_adapter
*adapter
= container_of(work
,
3545 struct e1000_adapter
, watchdog_task
);
3546 struct net_device
*netdev
= adapter
->netdev
;
3547 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
3548 struct e1000_phy_info
*phy
= &adapter
->hw
.phy
;
3549 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3550 struct e1000_hw
*hw
= &adapter
->hw
;
3554 link
= e1000_has_link(adapter
);
3555 if ((netif_carrier_ok(netdev
)) && link
) {
3556 e1000e_enable_receives(adapter
);
3560 if ((e1000e_enable_tx_pkt_filtering(hw
)) &&
3561 (adapter
->mng_vlan_id
!= adapter
->hw
.mng_cookie
.vlan_id
))
3562 e1000_update_mng_vlan(adapter
);
3565 if (!netif_carrier_ok(netdev
)) {
3567 /* update snapshot of PHY registers on LSC */
3568 e1000_phy_read_status(adapter
);
3569 mac
->ops
.get_link_up_info(&adapter
->hw
,
3570 &adapter
->link_speed
,
3571 &adapter
->link_duplex
);
3572 e1000_print_link_info(adapter
);
3574 * On supported PHYs, check for duplex mismatch only
3575 * if link has autonegotiated at 10/100 half
3577 if ((hw
->phy
.type
== e1000_phy_igp_3
||
3578 hw
->phy
.type
== e1000_phy_bm
) &&
3579 (hw
->mac
.autoneg
== true) &&
3580 (adapter
->link_speed
== SPEED_10
||
3581 adapter
->link_speed
== SPEED_100
) &&
3582 (adapter
->link_duplex
== HALF_DUPLEX
)) {
3585 e1e_rphy(hw
, PHY_AUTONEG_EXP
, &autoneg_exp
);
3587 if (!(autoneg_exp
& NWAY_ER_LP_NWAY_CAPS
))
3588 e_info("Autonegotiated half duplex but"
3589 " link partner cannot autoneg. "
3590 " Try forcing full duplex if "
3591 "link gets many collisions.\n");
3595 * tweak tx_queue_len according to speed/duplex
3596 * and adjust the timeout factor
3598 netdev
->tx_queue_len
= adapter
->tx_queue_len
;
3599 adapter
->tx_timeout_factor
= 1;
3600 switch (adapter
->link_speed
) {
3603 netdev
->tx_queue_len
= 10;
3604 adapter
->tx_timeout_factor
= 16;
3608 netdev
->tx_queue_len
= 100;
3609 adapter
->tx_timeout_factor
= 10;
3614 * workaround: re-program speed mode bit after
3617 if ((adapter
->flags
& FLAG_TARC_SPEED_MODE_BIT
) &&
3620 tarc0
= er32(TARC(0));
3621 tarc0
&= ~SPEED_MODE_BIT
;
3622 ew32(TARC(0), tarc0
);
3626 * disable TSO for pcie and 10/100 speeds, to avoid
3627 * some hardware issues
3629 if (!(adapter
->flags
& FLAG_TSO_FORCE
)) {
3630 switch (adapter
->link_speed
) {
3633 e_info("10/100 speed: disabling TSO\n");
3634 netdev
->features
&= ~NETIF_F_TSO
;
3635 netdev
->features
&= ~NETIF_F_TSO6
;
3638 netdev
->features
|= NETIF_F_TSO
;
3639 netdev
->features
|= NETIF_F_TSO6
;
3648 * enable transmits in the hardware, need to do this
3649 * after setting TARC(0)
3652 tctl
|= E1000_TCTL_EN
;
3656 * Perform any post-link-up configuration before
3657 * reporting link up.
3659 if (phy
->ops
.cfg_on_link_up
)
3660 phy
->ops
.cfg_on_link_up(hw
);
3662 netif_carrier_on(netdev
);
3664 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
3665 mod_timer(&adapter
->phy_info_timer
,
3666 round_jiffies(jiffies
+ 2 * HZ
));
3669 if (netif_carrier_ok(netdev
)) {
3670 adapter
->link_speed
= 0;
3671 adapter
->link_duplex
= 0;
3672 /* Link status message must follow this format */
3673 printk(KERN_INFO
"e1000e: %s NIC Link is Down\n",
3674 adapter
->netdev
->name
);
3675 netif_carrier_off(netdev
);
3676 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
3677 mod_timer(&adapter
->phy_info_timer
,
3678 round_jiffies(jiffies
+ 2 * HZ
));
3680 if (adapter
->flags
& FLAG_RX_NEEDS_RESTART
)
3681 schedule_work(&adapter
->reset_task
);
3686 e1000e_update_stats(adapter
);
3688 mac
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
3689 adapter
->tpt_old
= adapter
->stats
.tpt
;
3690 mac
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
3691 adapter
->colc_old
= adapter
->stats
.colc
;
3693 adapter
->gorc
= adapter
->stats
.gorc
- adapter
->gorc_old
;
3694 adapter
->gorc_old
= adapter
->stats
.gorc
;
3695 adapter
->gotc
= adapter
->stats
.gotc
- adapter
->gotc_old
;
3696 adapter
->gotc_old
= adapter
->stats
.gotc
;
3698 e1000e_update_adaptive(&adapter
->hw
);
3700 if (!netif_carrier_ok(netdev
)) {
3701 tx_pending
= (e1000_desc_unused(tx_ring
) + 1 <
3705 * We've lost link, so the controller stops DMA,
3706 * but we've got queued Tx work that's never going
3707 * to get done, so reset controller to flush Tx.
3708 * (Do the reset outside of interrupt context).
3710 adapter
->tx_timeout_count
++;
3711 schedule_work(&adapter
->reset_task
);
3712 /* return immediately since reset is imminent */
3717 /* Cause software interrupt to ensure Rx ring is cleaned */
3718 if (adapter
->msix_entries
)
3719 ew32(ICS
, adapter
->rx_ring
->ims_val
);
3721 ew32(ICS
, E1000_ICS_RXDMT0
);
3723 /* Force detection of hung controller every watchdog period */
3724 adapter
->detect_tx_hung
= 1;
3727 * With 82571 controllers, LAA may be overwritten due to controller
3728 * reset from the other port. Set the appropriate LAA in RAR[0]
3730 if (e1000e_get_laa_state_82571(hw
))
3731 e1000e_rar_set(hw
, adapter
->hw
.mac
.addr
, 0);
3733 /* Reset the timer */
3734 if (!test_bit(__E1000_DOWN
, &adapter
->state
))
3735 mod_timer(&adapter
->watchdog_timer
,
3736 round_jiffies(jiffies
+ 2 * HZ
));
3739 #define E1000_TX_FLAGS_CSUM 0x00000001
3740 #define E1000_TX_FLAGS_VLAN 0x00000002
3741 #define E1000_TX_FLAGS_TSO 0x00000004
3742 #define E1000_TX_FLAGS_IPV4 0x00000008
3743 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
3744 #define E1000_TX_FLAGS_VLAN_SHIFT 16
3746 static int e1000_tso(struct e1000_adapter
*adapter
,
3747 struct sk_buff
*skb
)
3749 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3750 struct e1000_context_desc
*context_desc
;
3751 struct e1000_buffer
*buffer_info
;
3754 u16 ipcse
= 0, tucse
, mss
;
3755 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
3758 if (!skb_is_gso(skb
))
3761 if (skb_header_cloned(skb
)) {
3762 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
3767 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
3768 mss
= skb_shinfo(skb
)->gso_size
;
3769 if (skb
->protocol
== htons(ETH_P_IP
)) {
3770 struct iphdr
*iph
= ip_hdr(skb
);
3773 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
, iph
->daddr
,
3775 cmd_length
= E1000_TXD_CMD_IP
;
3776 ipcse
= skb_transport_offset(skb
) - 1;
3777 } else if (skb_shinfo(skb
)->gso_type
== SKB_GSO_TCPV6
) {
3778 ipv6_hdr(skb
)->payload_len
= 0;
3779 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
3780 &ipv6_hdr(skb
)->daddr
,
3784 ipcss
= skb_network_offset(skb
);
3785 ipcso
= (void *)&(ip_hdr(skb
)->check
) - (void *)skb
->data
;
3786 tucss
= skb_transport_offset(skb
);
3787 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
3790 cmd_length
|= (E1000_TXD_CMD_DEXT
| E1000_TXD_CMD_TSE
|
3791 E1000_TXD_CMD_TCP
| (skb
->len
- (hdr_len
)));
3793 i
= tx_ring
->next_to_use
;
3794 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
3795 buffer_info
= &tx_ring
->buffer_info
[i
];
3797 context_desc
->lower_setup
.ip_fields
.ipcss
= ipcss
;
3798 context_desc
->lower_setup
.ip_fields
.ipcso
= ipcso
;
3799 context_desc
->lower_setup
.ip_fields
.ipcse
= cpu_to_le16(ipcse
);
3800 context_desc
->upper_setup
.tcp_fields
.tucss
= tucss
;
3801 context_desc
->upper_setup
.tcp_fields
.tucso
= tucso
;
3802 context_desc
->upper_setup
.tcp_fields
.tucse
= cpu_to_le16(tucse
);
3803 context_desc
->tcp_seg_setup
.fields
.mss
= cpu_to_le16(mss
);
3804 context_desc
->tcp_seg_setup
.fields
.hdr_len
= hdr_len
;
3805 context_desc
->cmd_and_length
= cpu_to_le32(cmd_length
);
3807 buffer_info
->time_stamp
= jiffies
;
3808 buffer_info
->next_to_watch
= i
;
3811 if (i
== tx_ring
->count
)
3813 tx_ring
->next_to_use
= i
;
3818 static bool e1000_tx_csum(struct e1000_adapter
*adapter
, struct sk_buff
*skb
)
3820 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3821 struct e1000_context_desc
*context_desc
;
3822 struct e1000_buffer
*buffer_info
;
3825 u32 cmd_len
= E1000_TXD_CMD_DEXT
;
3828 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
3831 if (skb
->protocol
== cpu_to_be16(ETH_P_8021Q
))
3832 protocol
= vlan_eth_hdr(skb
)->h_vlan_encapsulated_proto
;
3834 protocol
= skb
->protocol
;
3837 case cpu_to_be16(ETH_P_IP
):
3838 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
3839 cmd_len
|= E1000_TXD_CMD_TCP
;
3841 case cpu_to_be16(ETH_P_IPV6
):
3842 /* XXX not handling all IPV6 headers */
3843 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
3844 cmd_len
|= E1000_TXD_CMD_TCP
;
3847 if (unlikely(net_ratelimit()))
3848 e_warn("checksum_partial proto=%x!\n",
3849 be16_to_cpu(protocol
));
3853 css
= skb_transport_offset(skb
);
3855 i
= tx_ring
->next_to_use
;
3856 buffer_info
= &tx_ring
->buffer_info
[i
];
3857 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
3859 context_desc
->lower_setup
.ip_config
= 0;
3860 context_desc
->upper_setup
.tcp_fields
.tucss
= css
;
3861 context_desc
->upper_setup
.tcp_fields
.tucso
=
3862 css
+ skb
->csum_offset
;
3863 context_desc
->upper_setup
.tcp_fields
.tucse
= 0;
3864 context_desc
->tcp_seg_setup
.data
= 0;
3865 context_desc
->cmd_and_length
= cpu_to_le32(cmd_len
);
3867 buffer_info
->time_stamp
= jiffies
;
3868 buffer_info
->next_to_watch
= i
;
3871 if (i
== tx_ring
->count
)
3873 tx_ring
->next_to_use
= i
;
3878 #define E1000_MAX_PER_TXD 8192
3879 #define E1000_MAX_TXD_PWR 12
3881 static int e1000_tx_map(struct e1000_adapter
*adapter
,
3882 struct sk_buff
*skb
, unsigned int first
,
3883 unsigned int max_per_txd
, unsigned int nr_frags
,
3886 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3887 struct e1000_buffer
*buffer_info
;
3888 unsigned int len
= skb_headlen(skb
);
3889 unsigned int offset
, size
, count
= 0, i
;
3893 i
= tx_ring
->next_to_use
;
3895 if (skb_dma_map(&adapter
->pdev
->dev
, skb
, DMA_TO_DEVICE
)) {
3896 dev_err(&adapter
->pdev
->dev
, "TX DMA map failed\n");
3897 adapter
->tx_dma_failed
++;
3901 map
= skb_shinfo(skb
)->dma_maps
;
3905 buffer_info
= &tx_ring
->buffer_info
[i
];
3906 size
= min(len
, max_per_txd
);
3908 buffer_info
->length
= size
;
3909 buffer_info
->time_stamp
= jiffies
;
3910 buffer_info
->next_to_watch
= i
;
3911 buffer_info
->dma
= skb_shinfo(skb
)->dma_head
+ offset
;
3919 if (i
== tx_ring
->count
)
3924 for (f
= 0; f
< nr_frags
; f
++) {
3925 struct skb_frag_struct
*frag
;
3927 frag
= &skb_shinfo(skb
)->frags
[f
];
3933 if (i
== tx_ring
->count
)
3936 buffer_info
= &tx_ring
->buffer_info
[i
];
3937 size
= min(len
, max_per_txd
);
3939 buffer_info
->length
= size
;
3940 buffer_info
->time_stamp
= jiffies
;
3941 buffer_info
->next_to_watch
= i
;
3942 buffer_info
->dma
= map
[f
] + offset
;
3950 tx_ring
->buffer_info
[i
].skb
= skb
;
3951 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
3956 static void e1000_tx_queue(struct e1000_adapter
*adapter
,
3957 int tx_flags
, int count
)
3959 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
3960 struct e1000_tx_desc
*tx_desc
= NULL
;
3961 struct e1000_buffer
*buffer_info
;
3962 u32 txd_upper
= 0, txd_lower
= E1000_TXD_CMD_IFCS
;
3965 if (tx_flags
& E1000_TX_FLAGS_TSO
) {
3966 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
|
3968 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
3970 if (tx_flags
& E1000_TX_FLAGS_IPV4
)
3971 txd_upper
|= E1000_TXD_POPTS_IXSM
<< 8;
3974 if (tx_flags
& E1000_TX_FLAGS_CSUM
) {
3975 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
;
3976 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
3979 if (tx_flags
& E1000_TX_FLAGS_VLAN
) {
3980 txd_lower
|= E1000_TXD_CMD_VLE
;
3981 txd_upper
|= (tx_flags
& E1000_TX_FLAGS_VLAN_MASK
);
3984 i
= tx_ring
->next_to_use
;
3987 buffer_info
= &tx_ring
->buffer_info
[i
];
3988 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3989 tx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
3990 tx_desc
->lower
.data
=
3991 cpu_to_le32(txd_lower
| buffer_info
->length
);
3992 tx_desc
->upper
.data
= cpu_to_le32(txd_upper
);
3995 if (i
== tx_ring
->count
)
3999 tx_desc
->lower
.data
|= cpu_to_le32(adapter
->txd_cmd
);
4002 * Force memory writes to complete before letting h/w
4003 * know there are new descriptors to fetch. (Only
4004 * applicable for weak-ordered memory model archs,
4009 tx_ring
->next_to_use
= i
;
4010 writel(i
, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
4012 * we need this if more than one processor can write to our tail
4013 * at a time, it synchronizes IO on IA64/Altix systems
4018 #define MINIMUM_DHCP_PACKET_SIZE 282
4019 static int e1000_transfer_dhcp_info(struct e1000_adapter
*adapter
,
4020 struct sk_buff
*skb
)
4022 struct e1000_hw
*hw
= &adapter
->hw
;
4025 if (vlan_tx_tag_present(skb
)) {
4026 if (!((vlan_tx_tag_get(skb
) == adapter
->hw
.mng_cookie
.vlan_id
)
4027 && (adapter
->hw
.mng_cookie
.status
&
4028 E1000_MNG_DHCP_COOKIE_STATUS_VLAN
)))
4032 if (skb
->len
<= MINIMUM_DHCP_PACKET_SIZE
)
4035 if (((struct ethhdr
*) skb
->data
)->h_proto
!= htons(ETH_P_IP
))
4039 const struct iphdr
*ip
= (struct iphdr
*)((u8
*)skb
->data
+14);
4042 if (ip
->protocol
!= IPPROTO_UDP
)
4045 udp
= (struct udphdr
*)((u8
*)ip
+ (ip
->ihl
<< 2));
4046 if (ntohs(udp
->dest
) != 67)
4049 offset
= (u8
*)udp
+ 8 - skb
->data
;
4050 length
= skb
->len
- offset
;
4051 return e1000e_mng_write_dhcp_info(hw
, (u8
*)udp
+ 8, length
);
4057 static int __e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
4059 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4061 netif_stop_queue(netdev
);
4063 * Herbert's original patch had:
4064 * smp_mb__after_netif_stop_queue();
4065 * but since that doesn't exist yet, just open code it.
4070 * We need to check again in a case another CPU has just
4071 * made room available.
4073 if (e1000_desc_unused(adapter
->tx_ring
) < size
)
4077 netif_start_queue(netdev
);
4078 ++adapter
->restart_queue
;
4082 static int e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
4084 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4086 if (e1000_desc_unused(adapter
->tx_ring
) >= size
)
4088 return __e1000_maybe_stop_tx(netdev
, size
);
4091 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
4092 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
4093 struct net_device
*netdev
)
4095 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4096 struct e1000_ring
*tx_ring
= adapter
->tx_ring
;
4098 unsigned int max_per_txd
= E1000_MAX_PER_TXD
;
4099 unsigned int max_txd_pwr
= E1000_MAX_TXD_PWR
;
4100 unsigned int tx_flags
= 0;
4101 unsigned int len
= skb
->len
- skb
->data_len
;
4102 unsigned int nr_frags
;
4108 if (test_bit(__E1000_DOWN
, &adapter
->state
)) {
4109 dev_kfree_skb_any(skb
);
4110 return NETDEV_TX_OK
;
4113 if (skb
->len
<= 0) {
4114 dev_kfree_skb_any(skb
);
4115 return NETDEV_TX_OK
;
4118 mss
= skb_shinfo(skb
)->gso_size
;
4120 * The controller does a simple calculation to
4121 * make sure there is enough room in the FIFO before
4122 * initiating the DMA for each buffer. The calc is:
4123 * 4 = ceil(buffer len/mss). To make sure we don't
4124 * overrun the FIFO, adjust the max buffer len if mss
4129 max_per_txd
= min(mss
<< 2, max_per_txd
);
4130 max_txd_pwr
= fls(max_per_txd
) - 1;
4133 * TSO Workaround for 82571/2/3 Controllers -- if skb->data
4134 * points to just header, pull a few bytes of payload from
4135 * frags into skb->data
4137 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
4139 * we do this workaround for ES2LAN, but it is un-necessary,
4140 * avoiding it could save a lot of cycles
4142 if (skb
->data_len
&& (hdr_len
== len
)) {
4143 unsigned int pull_size
;
4145 pull_size
= min((unsigned int)4, skb
->data_len
);
4146 if (!__pskb_pull_tail(skb
, pull_size
)) {
4147 e_err("__pskb_pull_tail failed.\n");
4148 dev_kfree_skb_any(skb
);
4149 return NETDEV_TX_OK
;
4151 len
= skb
->len
- skb
->data_len
;
4155 /* reserve a descriptor for the offload context */
4156 if ((mss
) || (skb
->ip_summed
== CHECKSUM_PARTIAL
))
4160 count
+= TXD_USE_COUNT(len
, max_txd_pwr
);
4162 nr_frags
= skb_shinfo(skb
)->nr_frags
;
4163 for (f
= 0; f
< nr_frags
; f
++)
4164 count
+= TXD_USE_COUNT(skb_shinfo(skb
)->frags
[f
].size
,
4167 if (adapter
->hw
.mac
.tx_pkt_filtering
)
4168 e1000_transfer_dhcp_info(adapter
, skb
);
4171 * need: count + 2 desc gap to keep tail from touching
4172 * head, otherwise try next time
4174 if (e1000_maybe_stop_tx(netdev
, count
+ 2))
4175 return NETDEV_TX_BUSY
;
4177 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
4178 tx_flags
|= E1000_TX_FLAGS_VLAN
;
4179 tx_flags
|= (vlan_tx_tag_get(skb
) << E1000_TX_FLAGS_VLAN_SHIFT
);
4182 first
= tx_ring
->next_to_use
;
4184 tso
= e1000_tso(adapter
, skb
);
4186 dev_kfree_skb_any(skb
);
4187 return NETDEV_TX_OK
;
4191 tx_flags
|= E1000_TX_FLAGS_TSO
;
4192 else if (e1000_tx_csum(adapter
, skb
))
4193 tx_flags
|= E1000_TX_FLAGS_CSUM
;
4196 * Old method was to assume IPv4 packet by default if TSO was enabled.
4197 * 82571 hardware supports TSO capabilities for IPv6 as well...
4198 * no longer assume, we must.
4200 if (skb
->protocol
== htons(ETH_P_IP
))
4201 tx_flags
|= E1000_TX_FLAGS_IPV4
;
4203 /* if count is 0 then mapping error has occured */
4204 count
= e1000_tx_map(adapter
, skb
, first
, max_per_txd
, nr_frags
, mss
);
4206 e1000_tx_queue(adapter
, tx_flags
, count
);
4207 /* Make sure there is space in the ring for the next send. */
4208 e1000_maybe_stop_tx(netdev
, MAX_SKB_FRAGS
+ 2);
4211 dev_kfree_skb_any(skb
);
4212 tx_ring
->buffer_info
[first
].time_stamp
= 0;
4213 tx_ring
->next_to_use
= first
;
4216 return NETDEV_TX_OK
;
4220 * e1000_tx_timeout - Respond to a Tx Hang
4221 * @netdev: network interface device structure
4223 static void e1000_tx_timeout(struct net_device
*netdev
)
4225 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4227 /* Do the reset outside of interrupt context */
4228 adapter
->tx_timeout_count
++;
4229 schedule_work(&adapter
->reset_task
);
4232 static void e1000_reset_task(struct work_struct
*work
)
4234 struct e1000_adapter
*adapter
;
4235 adapter
= container_of(work
, struct e1000_adapter
, reset_task
);
4237 e1000e_reinit_locked(adapter
);
4241 * e1000_get_stats - Get System Network Statistics
4242 * @netdev: network interface device structure
4244 * Returns the address of the device statistics structure.
4245 * The statistics are actually updated from the timer callback.
4247 static struct net_device_stats
*e1000_get_stats(struct net_device
*netdev
)
4249 /* only return the current stats */
4250 return &netdev
->stats
;
4254 * e1000_change_mtu - Change the Maximum Transfer Unit
4255 * @netdev: network interface device structure
4256 * @new_mtu: new value for maximum frame size
4258 * Returns 0 on success, negative on failure
4260 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
)
4262 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4263 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
4265 /* Jumbo frame support */
4266 if ((max_frame
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) &&
4267 !(adapter
->flags
& FLAG_HAS_JUMBO_FRAMES
)) {
4268 e_err("Jumbo Frames not supported.\n");
4272 /* Supported frame sizes */
4273 if ((new_mtu
< ETH_ZLEN
+ ETH_FCS_LEN
+ VLAN_HLEN
) ||
4274 (max_frame
> adapter
->max_hw_frame_size
)) {
4275 e_err("Unsupported MTU setting\n");
4279 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->state
))
4281 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
4282 adapter
->max_frame_size
= max_frame
;
4283 e_info("changing MTU from %d to %d\n", netdev
->mtu
, new_mtu
);
4284 netdev
->mtu
= new_mtu
;
4285 if (netif_running(netdev
))
4286 e1000e_down(adapter
);
4289 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
4290 * means we reserve 2 more, this pushes us to allocate from the next
4292 * i.e. RXBUFFER_2048 --> size-4096 slab
4293 * However with the new *_jumbo_rx* routines, jumbo receives will use
4297 if (max_frame
<= 256)
4298 adapter
->rx_buffer_len
= 256;
4299 else if (max_frame
<= 512)
4300 adapter
->rx_buffer_len
= 512;
4301 else if (max_frame
<= 1024)
4302 adapter
->rx_buffer_len
= 1024;
4303 else if (max_frame
<= 2048)
4304 adapter
->rx_buffer_len
= 2048;
4306 adapter
->rx_buffer_len
= 4096;
4308 /* adjust allocation if LPE protects us, and we aren't using SBP */
4309 if ((max_frame
== ETH_FRAME_LEN
+ ETH_FCS_LEN
) ||
4310 (max_frame
== ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
))
4311 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
4314 if (netif_running(netdev
))
4317 e1000e_reset(adapter
);
4319 clear_bit(__E1000_RESETTING
, &adapter
->state
);
4324 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
4327 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4328 struct mii_ioctl_data
*data
= if_mii(ifr
);
4330 if (adapter
->hw
.phy
.media_type
!= e1000_media_type_copper
)
4335 data
->phy_id
= adapter
->hw
.phy
.addr
;
4338 e1000_phy_read_status(adapter
);
4340 switch (data
->reg_num
& 0x1F) {
4342 data
->val_out
= adapter
->phy_regs
.bmcr
;
4345 data
->val_out
= adapter
->phy_regs
.bmsr
;
4348 data
->val_out
= (adapter
->hw
.phy
.id
>> 16);
4351 data
->val_out
= (adapter
->hw
.phy
.id
& 0xFFFF);
4354 data
->val_out
= adapter
->phy_regs
.advertise
;
4357 data
->val_out
= adapter
->phy_regs
.lpa
;
4360 data
->val_out
= adapter
->phy_regs
.expansion
;
4363 data
->val_out
= adapter
->phy_regs
.ctrl1000
;
4366 data
->val_out
= adapter
->phy_regs
.stat1000
;
4369 data
->val_out
= adapter
->phy_regs
.estatus
;
4382 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4388 return e1000_mii_ioctl(netdev
, ifr
, cmd
);
4394 static int e1000_init_phy_wakeup(struct e1000_adapter
*adapter
, u32 wufc
)
4396 struct e1000_hw
*hw
= &adapter
->hw
;
4401 /* copy MAC RARs to PHY RARs */
4402 for (i
= 0; i
< adapter
->hw
.mac
.rar_entry_count
; i
++) {
4403 mac_reg
= er32(RAL(i
));
4404 e1e_wphy(hw
, BM_RAR_L(i
), (u16
)(mac_reg
& 0xFFFF));
4405 e1e_wphy(hw
, BM_RAR_M(i
), (u16
)((mac_reg
>> 16) & 0xFFFF));
4406 mac_reg
= er32(RAH(i
));
4407 e1e_wphy(hw
, BM_RAR_H(i
), (u16
)(mac_reg
& 0xFFFF));
4408 e1e_wphy(hw
, BM_RAR_CTRL(i
), (u16
)((mac_reg
>> 16) & 0xFFFF));
4411 /* copy MAC MTA to PHY MTA */
4412 for (i
= 0; i
< adapter
->hw
.mac
.mta_reg_count
; i
++) {
4413 mac_reg
= E1000_READ_REG_ARRAY(hw
, E1000_MTA
, i
);
4414 e1e_wphy(hw
, BM_MTA(i
), (u16
)(mac_reg
& 0xFFFF));
4415 e1e_wphy(hw
, BM_MTA(i
) + 1, (u16
)((mac_reg
>> 16) & 0xFFFF));
4418 /* configure PHY Rx Control register */
4419 e1e_rphy(&adapter
->hw
, BM_RCTL
, &phy_reg
);
4420 mac_reg
= er32(RCTL
);
4421 if (mac_reg
& E1000_RCTL_UPE
)
4422 phy_reg
|= BM_RCTL_UPE
;
4423 if (mac_reg
& E1000_RCTL_MPE
)
4424 phy_reg
|= BM_RCTL_MPE
;
4425 phy_reg
&= ~(BM_RCTL_MO_MASK
);
4426 if (mac_reg
& E1000_RCTL_MO_3
)
4427 phy_reg
|= (((mac_reg
& E1000_RCTL_MO_3
) >> E1000_RCTL_MO_SHIFT
)
4428 << BM_RCTL_MO_SHIFT
);
4429 if (mac_reg
& E1000_RCTL_BAM
)
4430 phy_reg
|= BM_RCTL_BAM
;
4431 if (mac_reg
& E1000_RCTL_PMCF
)
4432 phy_reg
|= BM_RCTL_PMCF
;
4433 mac_reg
= er32(CTRL
);
4434 if (mac_reg
& E1000_CTRL_RFCE
)
4435 phy_reg
|= BM_RCTL_RFCE
;
4436 e1e_wphy(&adapter
->hw
, BM_RCTL
, phy_reg
);
4438 /* enable PHY wakeup in MAC register */
4440 ew32(WUC
, E1000_WUC_PHY_WAKE
| E1000_WUC_PME_EN
);
4442 /* configure and enable PHY wakeup in PHY registers */
4443 e1e_wphy(&adapter
->hw
, BM_WUFC
, wufc
);
4444 e1e_wphy(&adapter
->hw
, BM_WUC
, E1000_WUC_PME_EN
);
4446 /* activate PHY wakeup */
4447 retval
= hw
->phy
.ops
.acquire(hw
);
4449 e_err("Could not acquire PHY\n");
4452 e1000e_write_phy_reg_mdic(hw
, IGP01E1000_PHY_PAGE_SELECT
,
4453 (BM_WUC_ENABLE_PAGE
<< IGP_PAGE_SHIFT
));
4454 retval
= e1000e_read_phy_reg_mdic(hw
, BM_WUC_ENABLE_REG
, &phy_reg
);
4456 e_err("Could not read PHY page 769\n");
4459 phy_reg
|= BM_WUC_ENABLE_BIT
| BM_WUC_HOST_WU_BIT
;
4460 retval
= e1000e_write_phy_reg_mdic(hw
, BM_WUC_ENABLE_REG
, phy_reg
);
4462 e_err("Could not set PHY Host Wakeup bit\n");
4464 hw
->phy
.ops
.release(hw
);
4469 static int __e1000_shutdown(struct pci_dev
*pdev
, bool *enable_wake
)
4471 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4472 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4473 struct e1000_hw
*hw
= &adapter
->hw
;
4474 u32 ctrl
, ctrl_ext
, rctl
, status
;
4475 u32 wufc
= adapter
->wol
;
4478 netif_device_detach(netdev
);
4480 if (netif_running(netdev
)) {
4481 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->state
));
4482 e1000e_down(adapter
);
4483 e1000_free_irq(adapter
);
4485 e1000e_reset_interrupt_capability(adapter
);
4487 retval
= pci_save_state(pdev
);
4491 status
= er32(STATUS
);
4492 if (status
& E1000_STATUS_LU
)
4493 wufc
&= ~E1000_WUFC_LNKC
;
4496 e1000_setup_rctl(adapter
);
4497 e1000_set_multi(netdev
);
4499 /* turn on all-multi mode if wake on multicast is enabled */
4500 if (wufc
& E1000_WUFC_MC
) {
4502 rctl
|= E1000_RCTL_MPE
;
4507 /* advertise wake from D3Cold */
4508 #define E1000_CTRL_ADVD3WUC 0x00100000
4509 /* phy power management enable */
4510 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4511 ctrl
|= E1000_CTRL_ADVD3WUC
;
4512 if (!(adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
))
4513 ctrl
|= E1000_CTRL_EN_PHY_PWR_MGMT
;
4516 if (adapter
->hw
.phy
.media_type
== e1000_media_type_fiber
||
4517 adapter
->hw
.phy
.media_type
==
4518 e1000_media_type_internal_serdes
) {
4519 /* keep the laser running in D3 */
4520 ctrl_ext
= er32(CTRL_EXT
);
4521 ctrl_ext
|= E1000_CTRL_EXT_SDP7_DATA
;
4522 ew32(CTRL_EXT
, ctrl_ext
);
4525 if (adapter
->flags
& FLAG_IS_ICH
)
4526 e1000e_disable_gig_wol_ich8lan(&adapter
->hw
);
4528 /* Allow time for pending master requests to run */
4529 e1000e_disable_pcie_master(&adapter
->hw
);
4531 if (adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
) {
4532 /* enable wakeup by the PHY */
4533 retval
= e1000_init_phy_wakeup(adapter
, wufc
);
4537 /* enable wakeup by the MAC */
4539 ew32(WUC
, E1000_WUC_PME_EN
);
4546 *enable_wake
= !!wufc
;
4548 /* make sure adapter isn't asleep if manageability is enabled */
4549 if ((adapter
->flags
& FLAG_MNG_PT_ENABLED
) ||
4550 (hw
->mac
.ops
.check_mng_mode(hw
)))
4551 *enable_wake
= true;
4553 if (adapter
->hw
.phy
.type
== e1000_phy_igp_3
)
4554 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter
->hw
);
4557 * Release control of h/w to f/w. If f/w is AMT enabled, this
4558 * would have already happened in close and is redundant.
4560 e1000_release_hw_control(adapter
);
4562 pci_disable_device(pdev
);
4567 static void e1000_power_off(struct pci_dev
*pdev
, bool sleep
, bool wake
)
4569 if (sleep
&& wake
) {
4570 pci_prepare_to_sleep(pdev
);
4574 pci_wake_from_d3(pdev
, wake
);
4575 pci_set_power_state(pdev
, PCI_D3hot
);
4578 static void e1000_complete_shutdown(struct pci_dev
*pdev
, bool sleep
,
4581 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4582 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4585 * The pci-e switch on some quad port adapters will report a
4586 * correctable error when the MAC transitions from D0 to D3. To
4587 * prevent this we need to mask off the correctable errors on the
4588 * downstream port of the pci-e switch.
4590 if (adapter
->flags
& FLAG_IS_QUAD_PORT
) {
4591 struct pci_dev
*us_dev
= pdev
->bus
->self
;
4592 int pos
= pci_find_capability(us_dev
, PCI_CAP_ID_EXP
);
4595 pci_read_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
, &devctl
);
4596 pci_write_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
,
4597 (devctl
& ~PCI_EXP_DEVCTL_CERE
));
4599 e1000_power_off(pdev
, sleep
, wake
);
4601 pci_write_config_word(us_dev
, pos
+ PCI_EXP_DEVCTL
, devctl
);
4603 e1000_power_off(pdev
, sleep
, wake
);
4607 static void e1000e_disable_l1aspm(struct pci_dev
*pdev
)
4613 * 82573 workaround - disable L1 ASPM on mobile chipsets
4615 * L1 ASPM on various mobile (ich7) chipsets do not behave properly
4616 * resulting in lost data or garbage information on the pci-e link
4617 * level. This could result in (false) bad EEPROM checksum errors,
4618 * long ping times (up to 2s) or even a system freeze/hang.
4620 * Unfortunately this feature saves about 1W power consumption when
4623 pos
= pci_find_capability(pdev
, PCI_CAP_ID_EXP
);
4624 pci_read_config_word(pdev
, pos
+ PCI_EXP_LNKCTL
, &val
);
4626 dev_warn(&pdev
->dev
, "Disabling L1 ASPM\n");
4628 pci_write_config_word(pdev
, pos
+ PCI_EXP_LNKCTL
, val
);
4633 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4638 retval
= __e1000_shutdown(pdev
, &wake
);
4640 e1000_complete_shutdown(pdev
, true, wake
);
4645 static int e1000_resume(struct pci_dev
*pdev
)
4647 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4648 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4649 struct e1000_hw
*hw
= &adapter
->hw
;
4652 pci_set_power_state(pdev
, PCI_D0
);
4653 pci_restore_state(pdev
);
4654 e1000e_disable_l1aspm(pdev
);
4656 err
= pci_enable_device_mem(pdev
);
4659 "Cannot enable PCI device from suspend\n");
4663 pci_set_master(pdev
);
4665 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4666 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4668 e1000e_set_interrupt_capability(adapter
);
4669 if (netif_running(netdev
)) {
4670 err
= e1000_request_irq(adapter
);
4675 e1000e_power_up_phy(adapter
);
4677 /* report the system wakeup cause from S3/S4 */
4678 if (adapter
->flags2
& FLAG2_HAS_PHY_WAKEUP
) {
4681 e1e_rphy(&adapter
->hw
, BM_WUS
, &phy_data
);
4683 e_info("PHY Wakeup cause - %s\n",
4684 phy_data
& E1000_WUS_EX
? "Unicast Packet" :
4685 phy_data
& E1000_WUS_MC
? "Multicast Packet" :
4686 phy_data
& E1000_WUS_BC
? "Broadcast Packet" :
4687 phy_data
& E1000_WUS_MAG
? "Magic Packet" :
4688 phy_data
& E1000_WUS_LNKC
? "Link Status "
4689 " Change" : "other");
4691 e1e_wphy(&adapter
->hw
, BM_WUS
, ~0);
4693 u32 wus
= er32(WUS
);
4695 e_info("MAC Wakeup cause - %s\n",
4696 wus
& E1000_WUS_EX
? "Unicast Packet" :
4697 wus
& E1000_WUS_MC
? "Multicast Packet" :
4698 wus
& E1000_WUS_BC
? "Broadcast Packet" :
4699 wus
& E1000_WUS_MAG
? "Magic Packet" :
4700 wus
& E1000_WUS_LNKC
? "Link Status Change" :
4706 e1000e_reset(adapter
);
4708 e1000_init_manageability(adapter
);
4710 if (netif_running(netdev
))
4713 netif_device_attach(netdev
);
4716 * If the controller has AMT, do not set DRV_LOAD until the interface
4717 * is up. For all other cases, let the f/w know that the h/w is now
4718 * under the control of the driver.
4720 if (!(adapter
->flags
& FLAG_HAS_AMT
))
4721 e1000_get_hw_control(adapter
);
4727 static void e1000_shutdown(struct pci_dev
*pdev
)
4731 __e1000_shutdown(pdev
, &wake
);
4733 if (system_state
== SYSTEM_POWER_OFF
)
4734 e1000_complete_shutdown(pdev
, false, wake
);
4737 #ifdef CONFIG_NET_POLL_CONTROLLER
4739 * Polling 'interrupt' - used by things like netconsole to send skbs
4740 * without having to re-enable interrupts. It's not called while
4741 * the interrupt routine is executing.
4743 static void e1000_netpoll(struct net_device
*netdev
)
4745 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4747 disable_irq(adapter
->pdev
->irq
);
4748 e1000_intr(adapter
->pdev
->irq
, netdev
);
4750 enable_irq(adapter
->pdev
->irq
);
4755 * e1000_io_error_detected - called when PCI error is detected
4756 * @pdev: Pointer to PCI device
4757 * @state: The current pci connection state
4759 * This function is called after a PCI bus error affecting
4760 * this device has been detected.
4762 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
4763 pci_channel_state_t state
)
4765 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4766 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4768 netif_device_detach(netdev
);
4770 if (state
== pci_channel_io_perm_failure
)
4771 return PCI_ERS_RESULT_DISCONNECT
;
4773 if (netif_running(netdev
))
4774 e1000e_down(adapter
);
4775 pci_disable_device(pdev
);
4777 /* Request a slot slot reset. */
4778 return PCI_ERS_RESULT_NEED_RESET
;
4782 * e1000_io_slot_reset - called after the pci bus has been reset.
4783 * @pdev: Pointer to PCI device
4785 * Restart the card from scratch, as if from a cold-boot. Implementation
4786 * resembles the first-half of the e1000_resume routine.
4788 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
)
4790 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4791 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4792 struct e1000_hw
*hw
= &adapter
->hw
;
4794 pci_ers_result_t result
;
4796 e1000e_disable_l1aspm(pdev
);
4797 err
= pci_enable_device_mem(pdev
);
4800 "Cannot re-enable PCI device after reset.\n");
4801 result
= PCI_ERS_RESULT_DISCONNECT
;
4803 pci_set_master(pdev
);
4804 pci_restore_state(pdev
);
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 out of the NVM */
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 struct pci_device_id 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
);