1 /*******************************************************************************
3 Intel(R) 82576 Virtual Function Linux driver
4 Copyright(c) 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 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *******************************************************************************/
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/init.h>
31 #include <linux/pci.h>
32 #include <linux/vmalloc.h>
33 #include <linux/pagemap.h>
34 #include <linux/delay.h>
35 #include <linux/netdevice.h>
36 #include <linux/tcp.h>
37 #include <linux/ipv6.h>
38 #include <linux/slab.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/pm_qos_params.h>
48 #define DRV_VERSION "1.0.0-k0"
49 char igbvf_driver_name
[] = "igbvf";
50 const char igbvf_driver_version
[] = DRV_VERSION
;
51 struct pm_qos_request_list
*igbvf_driver_pm_qos_req
;
52 static const char igbvf_driver_string
[] =
53 "Intel(R) Virtual Function Network Driver";
54 static const char igbvf_copyright
[] = "Copyright (c) 2009 Intel Corporation.";
56 static int igbvf_poll(struct napi_struct
*napi
, int budget
);
57 static void igbvf_reset(struct igbvf_adapter
*);
58 static void igbvf_set_interrupt_capability(struct igbvf_adapter
*);
59 static void igbvf_reset_interrupt_capability(struct igbvf_adapter
*);
61 static struct igbvf_info igbvf_vf_info
= {
65 .init_ops
= e1000_init_function_pointers_vf
,
68 static const struct igbvf_info
*igbvf_info_tbl
[] = {
69 [board_vf
] = &igbvf_vf_info
,
73 * igbvf_desc_unused - calculate if we have unused descriptors
75 static int igbvf_desc_unused(struct igbvf_ring
*ring
)
77 if (ring
->next_to_clean
> ring
->next_to_use
)
78 return ring
->next_to_clean
- ring
->next_to_use
- 1;
80 return ring
->count
+ ring
->next_to_clean
- ring
->next_to_use
- 1;
84 * igbvf_receive_skb - helper function to handle Rx indications
85 * @adapter: board private structure
86 * @status: descriptor status field as written by hardware
87 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
88 * @skb: pointer to sk_buff to be indicated to stack
90 static void igbvf_receive_skb(struct igbvf_adapter
*adapter
,
91 struct net_device
*netdev
,
95 if (adapter
->vlgrp
&& (status
& E1000_RXD_STAT_VP
))
96 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
98 E1000_RXD_SPC_VLAN_MASK
);
100 netif_receive_skb(skb
);
103 static inline void igbvf_rx_checksum_adv(struct igbvf_adapter
*adapter
,
104 u32 status_err
, struct sk_buff
*skb
)
106 skb
->ip_summed
= CHECKSUM_NONE
;
108 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
109 if ((status_err
& E1000_RXD_STAT_IXSM
) ||
110 (adapter
->flags
& IGBVF_FLAG_RX_CSUM_DISABLED
))
113 /* TCP/UDP checksum error bit is set */
115 (E1000_RXDEXT_STATERR_TCPE
| E1000_RXDEXT_STATERR_IPE
)) {
116 /* let the stack verify checksum errors */
117 adapter
->hw_csum_err
++;
121 /* It must be a TCP or UDP packet with a valid checksum */
122 if (status_err
& (E1000_RXD_STAT_TCPCS
| E1000_RXD_STAT_UDPCS
))
123 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
125 adapter
->hw_csum_good
++;
129 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
130 * @rx_ring: address of ring structure to repopulate
131 * @cleaned_count: number of buffers to repopulate
133 static void igbvf_alloc_rx_buffers(struct igbvf_ring
*rx_ring
,
136 struct igbvf_adapter
*adapter
= rx_ring
->adapter
;
137 struct net_device
*netdev
= adapter
->netdev
;
138 struct pci_dev
*pdev
= adapter
->pdev
;
139 union e1000_adv_rx_desc
*rx_desc
;
140 struct igbvf_buffer
*buffer_info
;
145 i
= rx_ring
->next_to_use
;
146 buffer_info
= &rx_ring
->buffer_info
[i
];
148 if (adapter
->rx_ps_hdr_size
)
149 bufsz
= adapter
->rx_ps_hdr_size
;
151 bufsz
= adapter
->rx_buffer_len
;
153 while (cleaned_count
--) {
154 rx_desc
= IGBVF_RX_DESC_ADV(*rx_ring
, i
);
156 if (adapter
->rx_ps_hdr_size
&& !buffer_info
->page_dma
) {
157 if (!buffer_info
->page
) {
158 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
159 if (!buffer_info
->page
) {
160 adapter
->alloc_rx_buff_failed
++;
163 buffer_info
->page_offset
= 0;
165 buffer_info
->page_offset
^= PAGE_SIZE
/ 2;
167 buffer_info
->page_dma
=
168 pci_map_page(pdev
, buffer_info
->page
,
169 buffer_info
->page_offset
,
174 if (!buffer_info
->skb
) {
175 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
177 adapter
->alloc_rx_buff_failed
++;
181 buffer_info
->skb
= skb
;
182 buffer_info
->dma
= pci_map_single(pdev
, skb
->data
,
186 /* Refresh the desc even if buffer_addrs didn't change because
187 * each write-back erases this info. */
188 if (adapter
->rx_ps_hdr_size
) {
189 rx_desc
->read
.pkt_addr
=
190 cpu_to_le64(buffer_info
->page_dma
);
191 rx_desc
->read
.hdr_addr
= cpu_to_le64(buffer_info
->dma
);
193 rx_desc
->read
.pkt_addr
=
194 cpu_to_le64(buffer_info
->dma
);
195 rx_desc
->read
.hdr_addr
= 0;
199 if (i
== rx_ring
->count
)
201 buffer_info
= &rx_ring
->buffer_info
[i
];
205 if (rx_ring
->next_to_use
!= i
) {
206 rx_ring
->next_to_use
= i
;
208 i
= (rx_ring
->count
- 1);
212 /* Force memory writes to complete before letting h/w
213 * know there are new descriptors to fetch. (Only
214 * applicable for weak-ordered memory model archs,
217 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
222 * igbvf_clean_rx_irq - Send received data up the network stack; legacy
223 * @adapter: board private structure
225 * the return value indicates whether actual cleaning was done, there
226 * is no guarantee that everything was cleaned
228 static bool igbvf_clean_rx_irq(struct igbvf_adapter
*adapter
,
229 int *work_done
, int work_to_do
)
231 struct igbvf_ring
*rx_ring
= adapter
->rx_ring
;
232 struct net_device
*netdev
= adapter
->netdev
;
233 struct pci_dev
*pdev
= adapter
->pdev
;
234 union e1000_adv_rx_desc
*rx_desc
, *next_rxd
;
235 struct igbvf_buffer
*buffer_info
, *next_buffer
;
237 bool cleaned
= false;
238 int cleaned_count
= 0;
239 unsigned int total_bytes
= 0, total_packets
= 0;
241 u32 length
, hlen
, staterr
;
243 i
= rx_ring
->next_to_clean
;
244 rx_desc
= IGBVF_RX_DESC_ADV(*rx_ring
, i
);
245 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
247 while (staterr
& E1000_RXD_STAT_DD
) {
248 if (*work_done
>= work_to_do
)
252 buffer_info
= &rx_ring
->buffer_info
[i
];
254 /* HW will not DMA in data larger than the given buffer, even
255 * if it parses the (NFS, of course) header to be larger. In
256 * that case, it fills the header buffer and spills the rest
259 hlen
= (le16_to_cpu(rx_desc
->wb
.lower
.lo_dword
.hs_rss
.hdr_info
) &
260 E1000_RXDADV_HDRBUFLEN_MASK
) >> E1000_RXDADV_HDRBUFLEN_SHIFT
;
261 if (hlen
> adapter
->rx_ps_hdr_size
)
262 hlen
= adapter
->rx_ps_hdr_size
;
264 length
= le16_to_cpu(rx_desc
->wb
.upper
.length
);
268 skb
= buffer_info
->skb
;
269 prefetch(skb
->data
- NET_IP_ALIGN
);
270 buffer_info
->skb
= NULL
;
271 if (!adapter
->rx_ps_hdr_size
) {
272 pci_unmap_single(pdev
, buffer_info
->dma
,
273 adapter
->rx_buffer_len
,
275 buffer_info
->dma
= 0;
276 skb_put(skb
, length
);
280 if (!skb_shinfo(skb
)->nr_frags
) {
281 pci_unmap_single(pdev
, buffer_info
->dma
,
282 adapter
->rx_ps_hdr_size
,
288 pci_unmap_page(pdev
, buffer_info
->page_dma
,
291 buffer_info
->page_dma
= 0;
293 skb_fill_page_desc(skb
, skb_shinfo(skb
)->nr_frags
++,
295 buffer_info
->page_offset
,
298 if ((adapter
->rx_buffer_len
> (PAGE_SIZE
/ 2)) ||
299 (page_count(buffer_info
->page
) != 1))
300 buffer_info
->page
= NULL
;
302 get_page(buffer_info
->page
);
305 skb
->data_len
+= length
;
306 skb
->truesize
+= length
;
310 if (i
== rx_ring
->count
)
312 next_rxd
= IGBVF_RX_DESC_ADV(*rx_ring
, i
);
314 next_buffer
= &rx_ring
->buffer_info
[i
];
316 if (!(staterr
& E1000_RXD_STAT_EOP
)) {
317 buffer_info
->skb
= next_buffer
->skb
;
318 buffer_info
->dma
= next_buffer
->dma
;
319 next_buffer
->skb
= skb
;
320 next_buffer
->dma
= 0;
324 if (staterr
& E1000_RXDEXT_ERR_FRAME_ERR_MASK
) {
325 dev_kfree_skb_irq(skb
);
329 total_bytes
+= skb
->len
;
332 igbvf_rx_checksum_adv(adapter
, staterr
, skb
);
334 skb
->protocol
= eth_type_trans(skb
, netdev
);
336 igbvf_receive_skb(adapter
, netdev
, skb
, staterr
,
337 rx_desc
->wb
.upper
.vlan
);
340 rx_desc
->wb
.upper
.status_error
= 0;
342 /* return some buffers to hardware, one at a time is too slow */
343 if (cleaned_count
>= IGBVF_RX_BUFFER_WRITE
) {
344 igbvf_alloc_rx_buffers(rx_ring
, cleaned_count
);
348 /* use prefetched values */
350 buffer_info
= next_buffer
;
352 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
355 rx_ring
->next_to_clean
= i
;
356 cleaned_count
= igbvf_desc_unused(rx_ring
);
359 igbvf_alloc_rx_buffers(rx_ring
, cleaned_count
);
361 adapter
->total_rx_packets
+= total_packets
;
362 adapter
->total_rx_bytes
+= total_bytes
;
363 adapter
->net_stats
.rx_bytes
+= total_bytes
;
364 adapter
->net_stats
.rx_packets
+= total_packets
;
368 static void igbvf_put_txbuf(struct igbvf_adapter
*adapter
,
369 struct igbvf_buffer
*buffer_info
)
371 if (buffer_info
->dma
) {
372 if (buffer_info
->mapped_as_page
)
373 pci_unmap_page(adapter
->pdev
,
378 pci_unmap_single(adapter
->pdev
,
382 buffer_info
->dma
= 0;
384 if (buffer_info
->skb
) {
385 dev_kfree_skb_any(buffer_info
->skb
);
386 buffer_info
->skb
= NULL
;
388 buffer_info
->time_stamp
= 0;
391 static void igbvf_print_tx_hang(struct igbvf_adapter
*adapter
)
393 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
394 unsigned int i
= tx_ring
->next_to_clean
;
395 unsigned int eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
396 union e1000_adv_tx_desc
*eop_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, eop
);
398 /* detected Tx unit hang */
399 dev_err(&adapter
->pdev
->dev
,
400 "Detected Tx Unit Hang:\n"
403 " next_to_use <%x>\n"
404 " next_to_clean <%x>\n"
405 "buffer_info[next_to_clean]:\n"
406 " time_stamp <%lx>\n"
407 " next_to_watch <%x>\n"
409 " next_to_watch.status <%x>\n",
410 readl(adapter
->hw
.hw_addr
+ tx_ring
->head
),
411 readl(adapter
->hw
.hw_addr
+ tx_ring
->tail
),
412 tx_ring
->next_to_use
,
413 tx_ring
->next_to_clean
,
414 tx_ring
->buffer_info
[eop
].time_stamp
,
417 eop_desc
->wb
.status
);
421 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
422 * @adapter: board private structure
424 * Return 0 on success, negative on failure
426 int igbvf_setup_tx_resources(struct igbvf_adapter
*adapter
,
427 struct igbvf_ring
*tx_ring
)
429 struct pci_dev
*pdev
= adapter
->pdev
;
432 size
= sizeof(struct igbvf_buffer
) * tx_ring
->count
;
433 tx_ring
->buffer_info
= vmalloc(size
);
434 if (!tx_ring
->buffer_info
)
436 memset(tx_ring
->buffer_info
, 0, size
);
438 /* round up to nearest 4K */
439 tx_ring
->size
= tx_ring
->count
* sizeof(union e1000_adv_tx_desc
);
440 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
442 tx_ring
->desc
= pci_alloc_consistent(pdev
, tx_ring
->size
,
448 tx_ring
->adapter
= adapter
;
449 tx_ring
->next_to_use
= 0;
450 tx_ring
->next_to_clean
= 0;
454 vfree(tx_ring
->buffer_info
);
455 dev_err(&adapter
->pdev
->dev
,
456 "Unable to allocate memory for the transmit descriptor ring\n");
461 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
462 * @adapter: board private structure
464 * Returns 0 on success, negative on failure
466 int igbvf_setup_rx_resources(struct igbvf_adapter
*adapter
,
467 struct igbvf_ring
*rx_ring
)
469 struct pci_dev
*pdev
= adapter
->pdev
;
472 size
= sizeof(struct igbvf_buffer
) * rx_ring
->count
;
473 rx_ring
->buffer_info
= vmalloc(size
);
474 if (!rx_ring
->buffer_info
)
476 memset(rx_ring
->buffer_info
, 0, size
);
478 desc_len
= sizeof(union e1000_adv_rx_desc
);
480 /* Round up to nearest 4K */
481 rx_ring
->size
= rx_ring
->count
* desc_len
;
482 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
484 rx_ring
->desc
= pci_alloc_consistent(pdev
, rx_ring
->size
,
490 rx_ring
->next_to_clean
= 0;
491 rx_ring
->next_to_use
= 0;
493 rx_ring
->adapter
= adapter
;
498 vfree(rx_ring
->buffer_info
);
499 rx_ring
->buffer_info
= NULL
;
500 dev_err(&adapter
->pdev
->dev
,
501 "Unable to allocate memory for the receive descriptor ring\n");
506 * igbvf_clean_tx_ring - Free Tx Buffers
507 * @tx_ring: ring to be cleaned
509 static void igbvf_clean_tx_ring(struct igbvf_ring
*tx_ring
)
511 struct igbvf_adapter
*adapter
= tx_ring
->adapter
;
512 struct igbvf_buffer
*buffer_info
;
516 if (!tx_ring
->buffer_info
)
519 /* Free all the Tx ring sk_buffs */
520 for (i
= 0; i
< tx_ring
->count
; i
++) {
521 buffer_info
= &tx_ring
->buffer_info
[i
];
522 igbvf_put_txbuf(adapter
, buffer_info
);
525 size
= sizeof(struct igbvf_buffer
) * tx_ring
->count
;
526 memset(tx_ring
->buffer_info
, 0, size
);
528 /* Zero out the descriptor ring */
529 memset(tx_ring
->desc
, 0, tx_ring
->size
);
531 tx_ring
->next_to_use
= 0;
532 tx_ring
->next_to_clean
= 0;
534 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->head
);
535 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
539 * igbvf_free_tx_resources - Free Tx Resources per Queue
540 * @tx_ring: ring to free resources from
542 * Free all transmit software resources
544 void igbvf_free_tx_resources(struct igbvf_ring
*tx_ring
)
546 struct pci_dev
*pdev
= tx_ring
->adapter
->pdev
;
548 igbvf_clean_tx_ring(tx_ring
);
550 vfree(tx_ring
->buffer_info
);
551 tx_ring
->buffer_info
= NULL
;
553 pci_free_consistent(pdev
, tx_ring
->size
, tx_ring
->desc
, tx_ring
->dma
);
555 tx_ring
->desc
= NULL
;
559 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
560 * @adapter: board private structure
562 static void igbvf_clean_rx_ring(struct igbvf_ring
*rx_ring
)
564 struct igbvf_adapter
*adapter
= rx_ring
->adapter
;
565 struct igbvf_buffer
*buffer_info
;
566 struct pci_dev
*pdev
= adapter
->pdev
;
570 if (!rx_ring
->buffer_info
)
573 /* Free all the Rx ring sk_buffs */
574 for (i
= 0; i
< rx_ring
->count
; i
++) {
575 buffer_info
= &rx_ring
->buffer_info
[i
];
576 if (buffer_info
->dma
) {
577 if (adapter
->rx_ps_hdr_size
){
578 pci_unmap_single(pdev
, buffer_info
->dma
,
579 adapter
->rx_ps_hdr_size
,
582 pci_unmap_single(pdev
, buffer_info
->dma
,
583 adapter
->rx_buffer_len
,
586 buffer_info
->dma
= 0;
589 if (buffer_info
->skb
) {
590 dev_kfree_skb(buffer_info
->skb
);
591 buffer_info
->skb
= NULL
;
594 if (buffer_info
->page
) {
595 if (buffer_info
->page_dma
)
596 pci_unmap_page(pdev
, buffer_info
->page_dma
,
599 put_page(buffer_info
->page
);
600 buffer_info
->page
= NULL
;
601 buffer_info
->page_dma
= 0;
602 buffer_info
->page_offset
= 0;
606 size
= sizeof(struct igbvf_buffer
) * rx_ring
->count
;
607 memset(rx_ring
->buffer_info
, 0, size
);
609 /* Zero out the descriptor ring */
610 memset(rx_ring
->desc
, 0, rx_ring
->size
);
612 rx_ring
->next_to_clean
= 0;
613 rx_ring
->next_to_use
= 0;
615 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->head
);
616 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
620 * igbvf_free_rx_resources - Free Rx Resources
621 * @rx_ring: ring to clean the resources from
623 * Free all receive software resources
626 void igbvf_free_rx_resources(struct igbvf_ring
*rx_ring
)
628 struct pci_dev
*pdev
= rx_ring
->adapter
->pdev
;
630 igbvf_clean_rx_ring(rx_ring
);
632 vfree(rx_ring
->buffer_info
);
633 rx_ring
->buffer_info
= NULL
;
635 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
637 rx_ring
->desc
= NULL
;
641 * igbvf_update_itr - update the dynamic ITR value based on statistics
642 * @adapter: pointer to adapter
643 * @itr_setting: current adapter->itr
644 * @packets: the number of packets during this measurement interval
645 * @bytes: the number of bytes during this measurement interval
647 * Stores a new ITR value based on packets and byte
648 * counts during the last interrupt. The advantage of per interrupt
649 * computation is faster updates and more accurate ITR for the current
650 * traffic pattern. Constants in this function were computed
651 * based on theoretical maximum wire speed and thresholds were set based
652 * on testing data as well as attempting to minimize response time
653 * while increasing bulk throughput. This functionality is controlled
654 * by the InterruptThrottleRate module parameter.
656 static unsigned int igbvf_update_itr(struct igbvf_adapter
*adapter
,
657 u16 itr_setting
, int packets
,
660 unsigned int retval
= itr_setting
;
663 goto update_itr_done
;
665 switch (itr_setting
) {
667 /* handle TSO and jumbo frames */
668 if (bytes
/packets
> 8000)
669 retval
= bulk_latency
;
670 else if ((packets
< 5) && (bytes
> 512))
671 retval
= low_latency
;
673 case low_latency
: /* 50 usec aka 20000 ints/s */
675 /* this if handles the TSO accounting */
676 if (bytes
/packets
> 8000)
677 retval
= bulk_latency
;
678 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
679 retval
= bulk_latency
;
680 else if ((packets
> 35))
681 retval
= lowest_latency
;
682 } else if (bytes
/packets
> 2000) {
683 retval
= bulk_latency
;
684 } else if (packets
<= 2 && bytes
< 512) {
685 retval
= lowest_latency
;
688 case bulk_latency
: /* 250 usec aka 4000 ints/s */
691 retval
= low_latency
;
692 } else if (bytes
< 6000) {
693 retval
= low_latency
;
702 static void igbvf_set_itr(struct igbvf_adapter
*adapter
)
704 struct e1000_hw
*hw
= &adapter
->hw
;
706 u32 new_itr
= adapter
->itr
;
708 adapter
->tx_itr
= igbvf_update_itr(adapter
, adapter
->tx_itr
,
709 adapter
->total_tx_packets
,
710 adapter
->total_tx_bytes
);
711 /* conservative mode (itr 3) eliminates the lowest_latency setting */
712 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
713 adapter
->tx_itr
= low_latency
;
715 adapter
->rx_itr
= igbvf_update_itr(adapter
, adapter
->rx_itr
,
716 adapter
->total_rx_packets
,
717 adapter
->total_rx_bytes
);
718 /* conservative mode (itr 3) eliminates the lowest_latency setting */
719 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
720 adapter
->rx_itr
= low_latency
;
722 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
724 switch (current_itr
) {
725 /* counts and packets in update_itr are dependent on these numbers */
730 new_itr
= 20000; /* aka hwitr = ~200 */
739 if (new_itr
!= adapter
->itr
) {
741 * this attempts to bias the interrupt rate towards Bulk
742 * by adding intermediate steps when interrupt rate is
745 new_itr
= new_itr
> adapter
->itr
?
746 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
748 adapter
->itr
= new_itr
;
749 adapter
->rx_ring
->itr_val
= 1952;
751 if (adapter
->msix_entries
)
752 adapter
->rx_ring
->set_itr
= 1;
759 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
760 * @adapter: board private structure
761 * returns true if ring is completely cleaned
763 static bool igbvf_clean_tx_irq(struct igbvf_ring
*tx_ring
)
765 struct igbvf_adapter
*adapter
= tx_ring
->adapter
;
766 struct e1000_hw
*hw
= &adapter
->hw
;
767 struct net_device
*netdev
= adapter
->netdev
;
768 struct igbvf_buffer
*buffer_info
;
770 union e1000_adv_tx_desc
*tx_desc
, *eop_desc
;
771 unsigned int total_bytes
= 0, total_packets
= 0;
772 unsigned int i
, eop
, count
= 0;
773 bool cleaned
= false;
775 i
= tx_ring
->next_to_clean
;
776 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
777 eop_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, eop
);
779 while ((eop_desc
->wb
.status
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
780 (count
< tx_ring
->count
)) {
781 for (cleaned
= false; !cleaned
; count
++) {
782 tx_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, i
);
783 buffer_info
= &tx_ring
->buffer_info
[i
];
784 cleaned
= (i
== eop
);
785 skb
= buffer_info
->skb
;
788 unsigned int segs
, bytecount
;
790 /* gso_segs is currently only valid for tcp */
791 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
792 /* multiply data chunks by size of headers */
793 bytecount
= ((segs
- 1) * skb_headlen(skb
)) +
795 total_packets
+= segs
;
796 total_bytes
+= bytecount
;
799 igbvf_put_txbuf(adapter
, buffer_info
);
800 tx_desc
->wb
.status
= 0;
803 if (i
== tx_ring
->count
)
806 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
807 eop_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, eop
);
810 tx_ring
->next_to_clean
= i
;
812 if (unlikely(count
&&
813 netif_carrier_ok(netdev
) &&
814 igbvf_desc_unused(tx_ring
) >= IGBVF_TX_QUEUE_WAKE
)) {
815 /* Make sure that anybody stopping the queue after this
816 * sees the new next_to_clean.
819 if (netif_queue_stopped(netdev
) &&
820 !(test_bit(__IGBVF_DOWN
, &adapter
->state
))) {
821 netif_wake_queue(netdev
);
822 ++adapter
->restart_queue
;
826 if (adapter
->detect_tx_hung
) {
827 /* Detect a transmit hang in hardware, this serializes the
828 * check with the clearing of time_stamp and movement of i */
829 adapter
->detect_tx_hung
= false;
830 if (tx_ring
->buffer_info
[i
].time_stamp
&&
831 time_after(jiffies
, tx_ring
->buffer_info
[i
].time_stamp
+
832 (adapter
->tx_timeout_factor
* HZ
)) &&
833 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
835 tx_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, i
);
836 /* detected Tx unit hang */
837 igbvf_print_tx_hang(adapter
);
839 netif_stop_queue(netdev
);
842 adapter
->net_stats
.tx_bytes
+= total_bytes
;
843 adapter
->net_stats
.tx_packets
+= total_packets
;
844 return (count
< tx_ring
->count
);
847 static irqreturn_t
igbvf_msix_other(int irq
, void *data
)
849 struct net_device
*netdev
= data
;
850 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
851 struct e1000_hw
*hw
= &adapter
->hw
;
853 adapter
->int_counter1
++;
855 netif_carrier_off(netdev
);
856 hw
->mac
.get_link_status
= 1;
857 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
858 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
860 ew32(EIMS
, adapter
->eims_other
);
865 static irqreturn_t
igbvf_intr_msix_tx(int irq
, void *data
)
867 struct net_device
*netdev
= data
;
868 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
869 struct e1000_hw
*hw
= &adapter
->hw
;
870 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
873 adapter
->total_tx_bytes
= 0;
874 adapter
->total_tx_packets
= 0;
876 /* auto mask will automatically reenable the interrupt when we write
878 if (!igbvf_clean_tx_irq(tx_ring
))
879 /* Ring was not completely cleaned, so fire another interrupt */
880 ew32(EICS
, tx_ring
->eims_value
);
882 ew32(EIMS
, tx_ring
->eims_value
);
887 static irqreturn_t
igbvf_intr_msix_rx(int irq
, void *data
)
889 struct net_device
*netdev
= data
;
890 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
892 adapter
->int_counter0
++;
894 /* Write the ITR value calculated at the end of the
895 * previous interrupt.
897 if (adapter
->rx_ring
->set_itr
) {
898 writel(adapter
->rx_ring
->itr_val
,
899 adapter
->hw
.hw_addr
+ adapter
->rx_ring
->itr_register
);
900 adapter
->rx_ring
->set_itr
= 0;
903 if (napi_schedule_prep(&adapter
->rx_ring
->napi
)) {
904 adapter
->total_rx_bytes
= 0;
905 adapter
->total_rx_packets
= 0;
906 __napi_schedule(&adapter
->rx_ring
->napi
);
912 #define IGBVF_NO_QUEUE -1
914 static void igbvf_assign_vector(struct igbvf_adapter
*adapter
, int rx_queue
,
915 int tx_queue
, int msix_vector
)
917 struct e1000_hw
*hw
= &adapter
->hw
;
920 /* 82576 uses a table-based method for assigning vectors.
921 Each queue has a single entry in the table to which we write
922 a vector number along with a "valid" bit. Sadly, the layout
923 of the table is somewhat counterintuitive. */
924 if (rx_queue
> IGBVF_NO_QUEUE
) {
925 index
= (rx_queue
>> 1);
926 ivar
= array_er32(IVAR0
, index
);
927 if (rx_queue
& 0x1) {
928 /* vector goes into third byte of register */
929 ivar
= ivar
& 0xFF00FFFF;
930 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 16;
932 /* vector goes into low byte of register */
933 ivar
= ivar
& 0xFFFFFF00;
934 ivar
|= msix_vector
| E1000_IVAR_VALID
;
936 adapter
->rx_ring
[rx_queue
].eims_value
= 1 << msix_vector
;
937 array_ew32(IVAR0
, index
, ivar
);
939 if (tx_queue
> IGBVF_NO_QUEUE
) {
940 index
= (tx_queue
>> 1);
941 ivar
= array_er32(IVAR0
, index
);
942 if (tx_queue
& 0x1) {
943 /* vector goes into high byte of register */
944 ivar
= ivar
& 0x00FFFFFF;
945 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 24;
947 /* vector goes into second byte of register */
948 ivar
= ivar
& 0xFFFF00FF;
949 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 8;
951 adapter
->tx_ring
[tx_queue
].eims_value
= 1 << msix_vector
;
952 array_ew32(IVAR0
, index
, ivar
);
957 * igbvf_configure_msix - Configure MSI-X hardware
959 * igbvf_configure_msix sets up the hardware to properly
960 * generate MSI-X interrupts.
962 static void igbvf_configure_msix(struct igbvf_adapter
*adapter
)
965 struct e1000_hw
*hw
= &adapter
->hw
;
966 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
967 struct igbvf_ring
*rx_ring
= adapter
->rx_ring
;
970 adapter
->eims_enable_mask
= 0;
972 igbvf_assign_vector(adapter
, IGBVF_NO_QUEUE
, 0, vector
++);
973 adapter
->eims_enable_mask
|= tx_ring
->eims_value
;
974 if (tx_ring
->itr_val
)
975 writel(tx_ring
->itr_val
,
976 hw
->hw_addr
+ tx_ring
->itr_register
);
978 writel(1952, hw
->hw_addr
+ tx_ring
->itr_register
);
980 igbvf_assign_vector(adapter
, 0, IGBVF_NO_QUEUE
, vector
++);
981 adapter
->eims_enable_mask
|= rx_ring
->eims_value
;
982 if (rx_ring
->itr_val
)
983 writel(rx_ring
->itr_val
,
984 hw
->hw_addr
+ rx_ring
->itr_register
);
986 writel(1952, hw
->hw_addr
+ rx_ring
->itr_register
);
988 /* set vector for other causes, i.e. link changes */
990 tmp
= (vector
++ | E1000_IVAR_VALID
);
992 ew32(IVAR_MISC
, tmp
);
994 adapter
->eims_enable_mask
= (1 << (vector
)) - 1;
995 adapter
->eims_other
= 1 << (vector
- 1);
999 static void igbvf_reset_interrupt_capability(struct igbvf_adapter
*adapter
)
1001 if (adapter
->msix_entries
) {
1002 pci_disable_msix(adapter
->pdev
);
1003 kfree(adapter
->msix_entries
);
1004 adapter
->msix_entries
= NULL
;
1009 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1011 * Attempt to configure interrupts using the best available
1012 * capabilities of the hardware and kernel.
1014 static void igbvf_set_interrupt_capability(struct igbvf_adapter
*adapter
)
1019 /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
1020 adapter
->msix_entries
= kcalloc(3, sizeof(struct msix_entry
),
1022 if (adapter
->msix_entries
) {
1023 for (i
= 0; i
< 3; i
++)
1024 adapter
->msix_entries
[i
].entry
= i
;
1026 err
= pci_enable_msix(adapter
->pdev
,
1027 adapter
->msix_entries
, 3);
1032 dev_err(&adapter
->pdev
->dev
,
1033 "Failed to initialize MSI-X interrupts.\n");
1034 igbvf_reset_interrupt_capability(adapter
);
1039 * igbvf_request_msix - Initialize MSI-X interrupts
1041 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1044 static int igbvf_request_msix(struct igbvf_adapter
*adapter
)
1046 struct net_device
*netdev
= adapter
->netdev
;
1047 int err
= 0, vector
= 0;
1049 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5)) {
1050 sprintf(adapter
->tx_ring
->name
, "%s-tx-0", netdev
->name
);
1051 sprintf(adapter
->rx_ring
->name
, "%s-rx-0", netdev
->name
);
1053 memcpy(adapter
->tx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1054 memcpy(adapter
->rx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1057 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1058 igbvf_intr_msix_tx
, 0, adapter
->tx_ring
->name
,
1063 adapter
->tx_ring
->itr_register
= E1000_EITR(vector
);
1064 adapter
->tx_ring
->itr_val
= 1952;
1067 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1068 igbvf_intr_msix_rx
, 0, adapter
->rx_ring
->name
,
1073 adapter
->rx_ring
->itr_register
= E1000_EITR(vector
);
1074 adapter
->rx_ring
->itr_val
= 1952;
1077 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1078 igbvf_msix_other
, 0, netdev
->name
, netdev
);
1082 igbvf_configure_msix(adapter
);
1089 * igbvf_alloc_queues - Allocate memory for all rings
1090 * @adapter: board private structure to initialize
1092 static int __devinit
igbvf_alloc_queues(struct igbvf_adapter
*adapter
)
1094 struct net_device
*netdev
= adapter
->netdev
;
1096 adapter
->tx_ring
= kzalloc(sizeof(struct igbvf_ring
), GFP_KERNEL
);
1097 if (!adapter
->tx_ring
)
1100 adapter
->rx_ring
= kzalloc(sizeof(struct igbvf_ring
), GFP_KERNEL
);
1101 if (!adapter
->rx_ring
) {
1102 kfree(adapter
->tx_ring
);
1106 netif_napi_add(netdev
, &adapter
->rx_ring
->napi
, igbvf_poll
, 64);
1112 * igbvf_request_irq - initialize interrupts
1114 * Attempts to configure interrupts using the best available
1115 * capabilities of the hardware and kernel.
1117 static int igbvf_request_irq(struct igbvf_adapter
*adapter
)
1121 /* igbvf supports msi-x only */
1122 if (adapter
->msix_entries
)
1123 err
= igbvf_request_msix(adapter
);
1128 dev_err(&adapter
->pdev
->dev
,
1129 "Unable to allocate interrupt, Error: %d\n", err
);
1134 static void igbvf_free_irq(struct igbvf_adapter
*adapter
)
1136 struct net_device
*netdev
= adapter
->netdev
;
1139 if (adapter
->msix_entries
) {
1140 for (vector
= 0; vector
< 3; vector
++)
1141 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1146 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1148 static void igbvf_irq_disable(struct igbvf_adapter
*adapter
)
1150 struct e1000_hw
*hw
= &adapter
->hw
;
1154 if (adapter
->msix_entries
)
1159 * igbvf_irq_enable - Enable default interrupt generation settings
1161 static void igbvf_irq_enable(struct igbvf_adapter
*adapter
)
1163 struct e1000_hw
*hw
= &adapter
->hw
;
1165 ew32(EIAC
, adapter
->eims_enable_mask
);
1166 ew32(EIAM
, adapter
->eims_enable_mask
);
1167 ew32(EIMS
, adapter
->eims_enable_mask
);
1171 * igbvf_poll - NAPI Rx polling callback
1172 * @napi: struct associated with this polling callback
1173 * @budget: amount of packets driver is allowed to process this poll
1175 static int igbvf_poll(struct napi_struct
*napi
, int budget
)
1177 struct igbvf_ring
*rx_ring
= container_of(napi
, struct igbvf_ring
, napi
);
1178 struct igbvf_adapter
*adapter
= rx_ring
->adapter
;
1179 struct e1000_hw
*hw
= &adapter
->hw
;
1182 igbvf_clean_rx_irq(adapter
, &work_done
, budget
);
1184 /* If not enough Rx work done, exit the polling mode */
1185 if (work_done
< budget
) {
1186 napi_complete(napi
);
1188 if (adapter
->itr_setting
& 3)
1189 igbvf_set_itr(adapter
);
1191 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
1192 ew32(EIMS
, adapter
->rx_ring
->eims_value
);
1199 * igbvf_set_rlpml - set receive large packet maximum length
1200 * @adapter: board private structure
1202 * Configure the maximum size of packets that will be received
1204 static void igbvf_set_rlpml(struct igbvf_adapter
*adapter
)
1206 int max_frame_size
= adapter
->max_frame_size
;
1207 struct e1000_hw
*hw
= &adapter
->hw
;
1210 max_frame_size
+= VLAN_TAG_SIZE
;
1212 e1000_rlpml_set_vf(hw
, max_frame_size
);
1215 static void igbvf_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
1217 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1218 struct e1000_hw
*hw
= &adapter
->hw
;
1220 if (hw
->mac
.ops
.set_vfta(hw
, vid
, true))
1221 dev_err(&adapter
->pdev
->dev
, "Failed to add vlan id %d\n", vid
);
1224 static void igbvf_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
1226 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1227 struct e1000_hw
*hw
= &adapter
->hw
;
1229 igbvf_irq_disable(adapter
);
1230 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
1232 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
1233 igbvf_irq_enable(adapter
);
1235 if (hw
->mac
.ops
.set_vfta(hw
, vid
, false))
1236 dev_err(&adapter
->pdev
->dev
,
1237 "Failed to remove vlan id %d\n", vid
);
1240 static void igbvf_vlan_rx_register(struct net_device
*netdev
,
1241 struct vlan_group
*grp
)
1243 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1245 adapter
->vlgrp
= grp
;
1248 static void igbvf_restore_vlan(struct igbvf_adapter
*adapter
)
1252 if (!adapter
->vlgrp
)
1255 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
1256 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
1258 igbvf_vlan_rx_add_vid(adapter
->netdev
, vid
);
1261 igbvf_set_rlpml(adapter
);
1265 * igbvf_configure_tx - Configure Transmit Unit after Reset
1266 * @adapter: board private structure
1268 * Configure the Tx unit of the MAC after a reset.
1270 static void igbvf_configure_tx(struct igbvf_adapter
*adapter
)
1272 struct e1000_hw
*hw
= &adapter
->hw
;
1273 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
1275 u32 txdctl
, dca_txctrl
;
1277 /* disable transmits */
1278 txdctl
= er32(TXDCTL(0));
1279 ew32(TXDCTL(0), txdctl
& ~E1000_TXDCTL_QUEUE_ENABLE
);
1282 /* Setup the HW Tx Head and Tail descriptor pointers */
1283 ew32(TDLEN(0), tx_ring
->count
* sizeof(union e1000_adv_tx_desc
));
1284 tdba
= tx_ring
->dma
;
1285 ew32(TDBAL(0), (tdba
& DMA_BIT_MASK(32)));
1286 ew32(TDBAH(0), (tdba
>> 32));
1289 tx_ring
->head
= E1000_TDH(0);
1290 tx_ring
->tail
= E1000_TDT(0);
1292 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1293 * MUST be delivered in order or it will completely screw up
1296 dca_txctrl
= er32(DCA_TXCTRL(0));
1297 dca_txctrl
&= ~E1000_DCA_TXCTRL_TX_WB_RO_EN
;
1298 ew32(DCA_TXCTRL(0), dca_txctrl
);
1300 /* enable transmits */
1301 txdctl
|= E1000_TXDCTL_QUEUE_ENABLE
;
1302 ew32(TXDCTL(0), txdctl
);
1304 /* Setup Transmit Descriptor Settings for eop descriptor */
1305 adapter
->txd_cmd
= E1000_ADVTXD_DCMD_EOP
| E1000_ADVTXD_DCMD_IFCS
;
1307 /* enable Report Status bit */
1308 adapter
->txd_cmd
|= E1000_ADVTXD_DCMD_RS
;
1312 * igbvf_setup_srrctl - configure the receive control registers
1313 * @adapter: Board private structure
1315 static void igbvf_setup_srrctl(struct igbvf_adapter
*adapter
)
1317 struct e1000_hw
*hw
= &adapter
->hw
;
1320 srrctl
&= ~(E1000_SRRCTL_DESCTYPE_MASK
|
1321 E1000_SRRCTL_BSIZEHDR_MASK
|
1322 E1000_SRRCTL_BSIZEPKT_MASK
);
1324 /* Enable queue drop to avoid head of line blocking */
1325 srrctl
|= E1000_SRRCTL_DROP_EN
;
1327 /* Setup buffer sizes */
1328 srrctl
|= ALIGN(adapter
->rx_buffer_len
, 1024) >>
1329 E1000_SRRCTL_BSIZEPKT_SHIFT
;
1331 if (adapter
->rx_buffer_len
< 2048) {
1332 adapter
->rx_ps_hdr_size
= 0;
1333 srrctl
|= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF
;
1335 adapter
->rx_ps_hdr_size
= 128;
1336 srrctl
|= adapter
->rx_ps_hdr_size
<<
1337 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT
;
1338 srrctl
|= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS
;
1341 ew32(SRRCTL(0), srrctl
);
1345 * igbvf_configure_rx - Configure Receive Unit after Reset
1346 * @adapter: board private structure
1348 * Configure the Rx unit of the MAC after a reset.
1350 static void igbvf_configure_rx(struct igbvf_adapter
*adapter
)
1352 struct e1000_hw
*hw
= &adapter
->hw
;
1353 struct igbvf_ring
*rx_ring
= adapter
->rx_ring
;
1357 /* disable receives */
1358 rxdctl
= er32(RXDCTL(0));
1359 ew32(RXDCTL(0), rxdctl
& ~E1000_RXDCTL_QUEUE_ENABLE
);
1362 rdlen
= rx_ring
->count
* sizeof(union e1000_adv_rx_desc
);
1365 * Setup the HW Rx Head and Tail Descriptor Pointers and
1366 * the Base and Length of the Rx Descriptor Ring
1368 rdba
= rx_ring
->dma
;
1369 ew32(RDBAL(0), (rdba
& DMA_BIT_MASK(32)));
1370 ew32(RDBAH(0), (rdba
>> 32));
1371 ew32(RDLEN(0), rx_ring
->count
* sizeof(union e1000_adv_rx_desc
));
1372 rx_ring
->head
= E1000_RDH(0);
1373 rx_ring
->tail
= E1000_RDT(0);
1377 rxdctl
|= E1000_RXDCTL_QUEUE_ENABLE
;
1378 rxdctl
&= 0xFFF00000;
1379 rxdctl
|= IGBVF_RX_PTHRESH
;
1380 rxdctl
|= IGBVF_RX_HTHRESH
<< 8;
1381 rxdctl
|= IGBVF_RX_WTHRESH
<< 16;
1383 igbvf_set_rlpml(adapter
);
1385 /* enable receives */
1386 ew32(RXDCTL(0), rxdctl
);
1390 * igbvf_set_multi - Multicast and Promiscuous mode set
1391 * @netdev: network interface device structure
1393 * The set_multi entry point is called whenever the multicast address
1394 * list or the network interface flags are updated. This routine is
1395 * responsible for configuring the hardware for proper multicast,
1396 * promiscuous mode, and all-multi behavior.
1398 static void igbvf_set_multi(struct net_device
*netdev
)
1400 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1401 struct e1000_hw
*hw
= &adapter
->hw
;
1402 struct dev_mc_list
*mc_ptr
;
1403 u8
*mta_list
= NULL
;
1406 if (!netdev_mc_empty(netdev
)) {
1407 mta_list
= kmalloc(netdev_mc_count(netdev
) * 6, GFP_ATOMIC
);
1409 dev_err(&adapter
->pdev
->dev
,
1410 "failed to allocate multicast filter list\n");
1415 /* prepare a packed array of only addresses. */
1417 netdev_for_each_mc_addr(mc_ptr
, netdev
)
1418 memcpy(mta_list
+ (i
++ * ETH_ALEN
), mc_ptr
->dmi_addr
, ETH_ALEN
);
1420 hw
->mac
.ops
.update_mc_addr_list(hw
, mta_list
, i
, 0, 0);
1425 * igbvf_configure - configure the hardware for Rx and Tx
1426 * @adapter: private board structure
1428 static void igbvf_configure(struct igbvf_adapter
*adapter
)
1430 igbvf_set_multi(adapter
->netdev
);
1432 igbvf_restore_vlan(adapter
);
1434 igbvf_configure_tx(adapter
);
1435 igbvf_setup_srrctl(adapter
);
1436 igbvf_configure_rx(adapter
);
1437 igbvf_alloc_rx_buffers(adapter
->rx_ring
,
1438 igbvf_desc_unused(adapter
->rx_ring
));
1441 /* igbvf_reset - bring the hardware into a known good state
1443 * This function boots the hardware and enables some settings that
1444 * require a configuration cycle of the hardware - those cannot be
1445 * set/changed during runtime. After reset the device needs to be
1446 * properly configured for Rx, Tx etc.
1448 static void igbvf_reset(struct igbvf_adapter
*adapter
)
1450 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
1451 struct net_device
*netdev
= adapter
->netdev
;
1452 struct e1000_hw
*hw
= &adapter
->hw
;
1454 /* Allow time for pending master requests to run */
1455 if (mac
->ops
.reset_hw(hw
))
1456 dev_err(&adapter
->pdev
->dev
, "PF still resetting\n");
1458 mac
->ops
.init_hw(hw
);
1460 if (is_valid_ether_addr(adapter
->hw
.mac
.addr
)) {
1461 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
,
1463 memcpy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
,
1467 adapter
->last_reset
= jiffies
;
1470 int igbvf_up(struct igbvf_adapter
*adapter
)
1472 struct e1000_hw
*hw
= &adapter
->hw
;
1474 /* hardware has been reset, we need to reload some things */
1475 igbvf_configure(adapter
);
1477 clear_bit(__IGBVF_DOWN
, &adapter
->state
);
1479 napi_enable(&adapter
->rx_ring
->napi
);
1480 if (adapter
->msix_entries
)
1481 igbvf_configure_msix(adapter
);
1483 /* Clear any pending interrupts. */
1485 igbvf_irq_enable(adapter
);
1487 /* start the watchdog */
1488 hw
->mac
.get_link_status
= 1;
1489 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1495 void igbvf_down(struct igbvf_adapter
*adapter
)
1497 struct net_device
*netdev
= adapter
->netdev
;
1498 struct e1000_hw
*hw
= &adapter
->hw
;
1502 * signal that we're down so the interrupt handler does not
1503 * reschedule our watchdog timer
1505 set_bit(__IGBVF_DOWN
, &adapter
->state
);
1507 /* disable receives in the hardware */
1508 rxdctl
= er32(RXDCTL(0));
1509 ew32(RXDCTL(0), rxdctl
& ~E1000_RXDCTL_QUEUE_ENABLE
);
1511 netif_stop_queue(netdev
);
1513 /* disable transmits in the hardware */
1514 txdctl
= er32(TXDCTL(0));
1515 ew32(TXDCTL(0), txdctl
& ~E1000_TXDCTL_QUEUE_ENABLE
);
1517 /* flush both disables and wait for them to finish */
1521 napi_disable(&adapter
->rx_ring
->napi
);
1523 igbvf_irq_disable(adapter
);
1525 del_timer_sync(&adapter
->watchdog_timer
);
1527 netif_carrier_off(netdev
);
1529 /* record the stats before reset*/
1530 igbvf_update_stats(adapter
);
1532 adapter
->link_speed
= 0;
1533 adapter
->link_duplex
= 0;
1535 igbvf_reset(adapter
);
1536 igbvf_clean_tx_ring(adapter
->tx_ring
);
1537 igbvf_clean_rx_ring(adapter
->rx_ring
);
1540 void igbvf_reinit_locked(struct igbvf_adapter
*adapter
)
1543 while (test_and_set_bit(__IGBVF_RESETTING
, &adapter
->state
))
1545 igbvf_down(adapter
);
1547 clear_bit(__IGBVF_RESETTING
, &adapter
->state
);
1551 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1552 * @adapter: board private structure to initialize
1554 * igbvf_sw_init initializes the Adapter private data structure.
1555 * Fields are initialized based on PCI device information and
1556 * OS network device settings (MTU size).
1558 static int __devinit
igbvf_sw_init(struct igbvf_adapter
*adapter
)
1560 struct net_device
*netdev
= adapter
->netdev
;
1563 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
;
1564 adapter
->rx_ps_hdr_size
= 0;
1565 adapter
->max_frame_size
= netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
1566 adapter
->min_frame_size
= ETH_ZLEN
+ ETH_FCS_LEN
;
1568 adapter
->tx_int_delay
= 8;
1569 adapter
->tx_abs_int_delay
= 32;
1570 adapter
->rx_int_delay
= 0;
1571 adapter
->rx_abs_int_delay
= 8;
1572 adapter
->itr_setting
= 3;
1573 adapter
->itr
= 20000;
1575 /* Set various function pointers */
1576 adapter
->ei
->init_ops(&adapter
->hw
);
1578 rc
= adapter
->hw
.mac
.ops
.init_params(&adapter
->hw
);
1582 rc
= adapter
->hw
.mbx
.ops
.init_params(&adapter
->hw
);
1586 igbvf_set_interrupt_capability(adapter
);
1588 if (igbvf_alloc_queues(adapter
))
1591 spin_lock_init(&adapter
->tx_queue_lock
);
1593 /* Explicitly disable IRQ since the NIC can be in any state. */
1594 igbvf_irq_disable(adapter
);
1596 spin_lock_init(&adapter
->stats_lock
);
1598 set_bit(__IGBVF_DOWN
, &adapter
->state
);
1602 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter
*adapter
)
1604 struct e1000_hw
*hw
= &adapter
->hw
;
1606 adapter
->stats
.last_gprc
= er32(VFGPRC
);
1607 adapter
->stats
.last_gorc
= er32(VFGORC
);
1608 adapter
->stats
.last_gptc
= er32(VFGPTC
);
1609 adapter
->stats
.last_gotc
= er32(VFGOTC
);
1610 adapter
->stats
.last_mprc
= er32(VFMPRC
);
1611 adapter
->stats
.last_gotlbc
= er32(VFGOTLBC
);
1612 adapter
->stats
.last_gptlbc
= er32(VFGPTLBC
);
1613 adapter
->stats
.last_gorlbc
= er32(VFGORLBC
);
1614 adapter
->stats
.last_gprlbc
= er32(VFGPRLBC
);
1616 adapter
->stats
.base_gprc
= er32(VFGPRC
);
1617 adapter
->stats
.base_gorc
= er32(VFGORC
);
1618 adapter
->stats
.base_gptc
= er32(VFGPTC
);
1619 adapter
->stats
.base_gotc
= er32(VFGOTC
);
1620 adapter
->stats
.base_mprc
= er32(VFMPRC
);
1621 adapter
->stats
.base_gotlbc
= er32(VFGOTLBC
);
1622 adapter
->stats
.base_gptlbc
= er32(VFGPTLBC
);
1623 adapter
->stats
.base_gorlbc
= er32(VFGORLBC
);
1624 adapter
->stats
.base_gprlbc
= er32(VFGPRLBC
);
1628 * igbvf_open - Called when a network interface is made active
1629 * @netdev: network interface device structure
1631 * Returns 0 on success, negative value on failure
1633 * The open entry point is called when a network interface is made
1634 * active by the system (IFF_UP). At this point all resources needed
1635 * for transmit and receive operations are allocated, the interrupt
1636 * handler is registered with the OS, the watchdog timer is started,
1637 * and the stack is notified that the interface is ready.
1639 static int igbvf_open(struct net_device
*netdev
)
1641 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1642 struct e1000_hw
*hw
= &adapter
->hw
;
1645 /* disallow open during test */
1646 if (test_bit(__IGBVF_TESTING
, &adapter
->state
))
1649 /* allocate transmit descriptors */
1650 err
= igbvf_setup_tx_resources(adapter
, adapter
->tx_ring
);
1654 /* allocate receive descriptors */
1655 err
= igbvf_setup_rx_resources(adapter
, adapter
->rx_ring
);
1660 * before we allocate an interrupt, we must be ready to handle it.
1661 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1662 * as soon as we call pci_request_irq, so we have to setup our
1663 * clean_rx handler before we do so.
1665 igbvf_configure(adapter
);
1667 err
= igbvf_request_irq(adapter
);
1671 /* From here on the code is the same as igbvf_up() */
1672 clear_bit(__IGBVF_DOWN
, &adapter
->state
);
1674 napi_enable(&adapter
->rx_ring
->napi
);
1676 /* clear any pending interrupts */
1679 igbvf_irq_enable(adapter
);
1681 /* start the watchdog */
1682 hw
->mac
.get_link_status
= 1;
1683 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1688 igbvf_free_rx_resources(adapter
->rx_ring
);
1690 igbvf_free_tx_resources(adapter
->tx_ring
);
1692 igbvf_reset(adapter
);
1698 * igbvf_close - Disables a network interface
1699 * @netdev: network interface device structure
1701 * Returns 0, this is not allowed to fail
1703 * The close entry point is called when an interface is de-activated
1704 * by the OS. The hardware is still under the drivers control, but
1705 * needs to be disabled. A global MAC reset is issued to stop the
1706 * hardware, and all transmit and receive resources are freed.
1708 static int igbvf_close(struct net_device
*netdev
)
1710 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1712 WARN_ON(test_bit(__IGBVF_RESETTING
, &adapter
->state
));
1713 igbvf_down(adapter
);
1715 igbvf_free_irq(adapter
);
1717 igbvf_free_tx_resources(adapter
->tx_ring
);
1718 igbvf_free_rx_resources(adapter
->rx_ring
);
1723 * igbvf_set_mac - Change the Ethernet Address of the NIC
1724 * @netdev: network interface device structure
1725 * @p: pointer to an address structure
1727 * Returns 0 on success, negative on failure
1729 static int igbvf_set_mac(struct net_device
*netdev
, void *p
)
1731 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1732 struct e1000_hw
*hw
= &adapter
->hw
;
1733 struct sockaddr
*addr
= p
;
1735 if (!is_valid_ether_addr(addr
->sa_data
))
1736 return -EADDRNOTAVAIL
;
1738 memcpy(hw
->mac
.addr
, addr
->sa_data
, netdev
->addr_len
);
1740 hw
->mac
.ops
.rar_set(hw
, hw
->mac
.addr
, 0);
1742 if (memcmp(addr
->sa_data
, hw
->mac
.addr
, 6))
1743 return -EADDRNOTAVAIL
;
1745 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1750 #define UPDATE_VF_COUNTER(reg, name) \
1752 u32 current_counter = er32(reg); \
1753 if (current_counter < adapter->stats.last_##name) \
1754 adapter->stats.name += 0x100000000LL; \
1755 adapter->stats.last_##name = current_counter; \
1756 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1757 adapter->stats.name |= current_counter; \
1761 * igbvf_update_stats - Update the board statistics counters
1762 * @adapter: board private structure
1764 void igbvf_update_stats(struct igbvf_adapter
*adapter
)
1766 struct e1000_hw
*hw
= &adapter
->hw
;
1767 struct pci_dev
*pdev
= adapter
->pdev
;
1770 * Prevent stats update while adapter is being reset, link is down
1771 * or if the pci connection is down.
1773 if (adapter
->link_speed
== 0)
1776 if (test_bit(__IGBVF_RESETTING
, &adapter
->state
))
1779 if (pci_channel_offline(pdev
))
1782 UPDATE_VF_COUNTER(VFGPRC
, gprc
);
1783 UPDATE_VF_COUNTER(VFGORC
, gorc
);
1784 UPDATE_VF_COUNTER(VFGPTC
, gptc
);
1785 UPDATE_VF_COUNTER(VFGOTC
, gotc
);
1786 UPDATE_VF_COUNTER(VFMPRC
, mprc
);
1787 UPDATE_VF_COUNTER(VFGOTLBC
, gotlbc
);
1788 UPDATE_VF_COUNTER(VFGPTLBC
, gptlbc
);
1789 UPDATE_VF_COUNTER(VFGORLBC
, gorlbc
);
1790 UPDATE_VF_COUNTER(VFGPRLBC
, gprlbc
);
1792 /* Fill out the OS statistics structure */
1793 adapter
->net_stats
.multicast
= adapter
->stats
.mprc
;
1796 static void igbvf_print_link_info(struct igbvf_adapter
*adapter
)
1798 dev_info(&adapter
->pdev
->dev
, "Link is Up %d Mbps %s\n",
1799 adapter
->link_speed
,
1800 ((adapter
->link_duplex
== FULL_DUPLEX
) ?
1801 "Full Duplex" : "Half Duplex"));
1804 static bool igbvf_has_link(struct igbvf_adapter
*adapter
)
1806 struct e1000_hw
*hw
= &adapter
->hw
;
1807 s32 ret_val
= E1000_SUCCESS
;
1810 /* If interface is down, stay link down */
1811 if (test_bit(__IGBVF_DOWN
, &adapter
->state
))
1814 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
1815 link_active
= !hw
->mac
.get_link_status
;
1817 /* if check for link returns error we will need to reset */
1818 if (ret_val
&& time_after(jiffies
, adapter
->last_reset
+ (10 * HZ
)))
1819 schedule_work(&adapter
->reset_task
);
1825 * igbvf_watchdog - Timer Call-back
1826 * @data: pointer to adapter cast into an unsigned long
1828 static void igbvf_watchdog(unsigned long data
)
1830 struct igbvf_adapter
*adapter
= (struct igbvf_adapter
*) data
;
1832 /* Do the rest outside of interrupt context */
1833 schedule_work(&adapter
->watchdog_task
);
1836 static void igbvf_watchdog_task(struct work_struct
*work
)
1838 struct igbvf_adapter
*adapter
= container_of(work
,
1839 struct igbvf_adapter
,
1841 struct net_device
*netdev
= adapter
->netdev
;
1842 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
1843 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
1844 struct e1000_hw
*hw
= &adapter
->hw
;
1848 link
= igbvf_has_link(adapter
);
1851 if (!netif_carrier_ok(netdev
)) {
1854 mac
->ops
.get_link_up_info(&adapter
->hw
,
1855 &adapter
->link_speed
,
1856 &adapter
->link_duplex
);
1857 igbvf_print_link_info(adapter
);
1859 /* adjust timeout factor according to speed/duplex */
1860 adapter
->tx_timeout_factor
= 1;
1861 switch (adapter
->link_speed
) {
1864 adapter
->tx_timeout_factor
= 16;
1868 /* maybe add some timeout factor ? */
1872 netif_carrier_on(netdev
);
1873 netif_wake_queue(netdev
);
1876 if (netif_carrier_ok(netdev
)) {
1877 adapter
->link_speed
= 0;
1878 adapter
->link_duplex
= 0;
1879 dev_info(&adapter
->pdev
->dev
, "Link is Down\n");
1880 netif_carrier_off(netdev
);
1881 netif_stop_queue(netdev
);
1885 if (netif_carrier_ok(netdev
)) {
1886 igbvf_update_stats(adapter
);
1888 tx_pending
= (igbvf_desc_unused(tx_ring
) + 1 <
1892 * We've lost link, so the controller stops DMA,
1893 * but we've got queued Tx work that's never going
1894 * to get done, so reset controller to flush Tx.
1895 * (Do the reset outside of interrupt context).
1897 adapter
->tx_timeout_count
++;
1898 schedule_work(&adapter
->reset_task
);
1902 /* Cause software interrupt to ensure Rx ring is cleaned */
1903 ew32(EICS
, adapter
->rx_ring
->eims_value
);
1905 /* Force detection of hung controller every watchdog period */
1906 adapter
->detect_tx_hung
= 1;
1908 /* Reset the timer */
1909 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
1910 mod_timer(&adapter
->watchdog_timer
,
1911 round_jiffies(jiffies
+ (2 * HZ
)));
1914 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1915 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1916 #define IGBVF_TX_FLAGS_TSO 0x00000004
1917 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1918 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1919 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1921 static int igbvf_tso(struct igbvf_adapter
*adapter
,
1922 struct igbvf_ring
*tx_ring
,
1923 struct sk_buff
*skb
, u32 tx_flags
, u8
*hdr_len
)
1925 struct e1000_adv_tx_context_desc
*context_desc
;
1928 struct igbvf_buffer
*buffer_info
;
1929 u32 info
= 0, tu_cmd
= 0;
1930 u32 mss_l4len_idx
, l4len
;
1933 if (skb_header_cloned(skb
)) {
1934 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1936 dev_err(&adapter
->pdev
->dev
,
1937 "igbvf_tso returning an error\n");
1942 l4len
= tcp_hdrlen(skb
);
1945 if (skb
->protocol
== htons(ETH_P_IP
)) {
1946 struct iphdr
*iph
= ip_hdr(skb
);
1949 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
1953 } else if (skb_is_gso_v6(skb
)) {
1954 ipv6_hdr(skb
)->payload_len
= 0;
1955 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
1956 &ipv6_hdr(skb
)->daddr
,
1960 i
= tx_ring
->next_to_use
;
1962 buffer_info
= &tx_ring
->buffer_info
[i
];
1963 context_desc
= IGBVF_TX_CTXTDESC_ADV(*tx_ring
, i
);
1964 /* VLAN MACLEN IPLEN */
1965 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
1966 info
|= (tx_flags
& IGBVF_TX_FLAGS_VLAN_MASK
);
1967 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
1968 *hdr_len
+= skb_network_offset(skb
);
1969 info
|= (skb_transport_header(skb
) - skb_network_header(skb
));
1970 *hdr_len
+= (skb_transport_header(skb
) - skb_network_header(skb
));
1971 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
1973 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1974 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
1976 if (skb
->protocol
== htons(ETH_P_IP
))
1977 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
1978 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
1980 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
1983 mss_l4len_idx
= (skb_shinfo(skb
)->gso_size
<< E1000_ADVTXD_MSS_SHIFT
);
1984 mss_l4len_idx
|= (l4len
<< E1000_ADVTXD_L4LEN_SHIFT
);
1986 context_desc
->mss_l4len_idx
= cpu_to_le32(mss_l4len_idx
);
1987 context_desc
->seqnum_seed
= 0;
1989 buffer_info
->time_stamp
= jiffies
;
1990 buffer_info
->next_to_watch
= i
;
1991 buffer_info
->dma
= 0;
1993 if (i
== tx_ring
->count
)
1996 tx_ring
->next_to_use
= i
;
2001 static inline bool igbvf_tx_csum(struct igbvf_adapter
*adapter
,
2002 struct igbvf_ring
*tx_ring
,
2003 struct sk_buff
*skb
, u32 tx_flags
)
2005 struct e1000_adv_tx_context_desc
*context_desc
;
2007 struct igbvf_buffer
*buffer_info
;
2008 u32 info
= 0, tu_cmd
= 0;
2010 if ((skb
->ip_summed
== CHECKSUM_PARTIAL
) ||
2011 (tx_flags
& IGBVF_TX_FLAGS_VLAN
)) {
2012 i
= tx_ring
->next_to_use
;
2013 buffer_info
= &tx_ring
->buffer_info
[i
];
2014 context_desc
= IGBVF_TX_CTXTDESC_ADV(*tx_ring
, i
);
2016 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
2017 info
|= (tx_flags
& IGBVF_TX_FLAGS_VLAN_MASK
);
2019 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
2020 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
2021 info
|= (skb_transport_header(skb
) -
2022 skb_network_header(skb
));
2025 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
2027 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
2029 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
2030 switch (skb
->protocol
) {
2031 case __constant_htons(ETH_P_IP
):
2032 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
2033 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2034 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2036 case __constant_htons(ETH_P_IPV6
):
2037 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2038 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2045 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
2046 context_desc
->seqnum_seed
= 0;
2047 context_desc
->mss_l4len_idx
= 0;
2049 buffer_info
->time_stamp
= jiffies
;
2050 buffer_info
->next_to_watch
= i
;
2051 buffer_info
->dma
= 0;
2053 if (i
== tx_ring
->count
)
2055 tx_ring
->next_to_use
= i
;
2063 static int igbvf_maybe_stop_tx(struct net_device
*netdev
, int size
)
2065 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2067 /* there is enough descriptors then we don't need to worry */
2068 if (igbvf_desc_unused(adapter
->tx_ring
) >= size
)
2071 netif_stop_queue(netdev
);
2075 /* We need to check again just in case room has been made available */
2076 if (igbvf_desc_unused(adapter
->tx_ring
) < size
)
2079 netif_wake_queue(netdev
);
2081 ++adapter
->restart_queue
;
2085 #define IGBVF_MAX_TXD_PWR 16
2086 #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR)
2088 static inline int igbvf_tx_map_adv(struct igbvf_adapter
*adapter
,
2089 struct igbvf_ring
*tx_ring
,
2090 struct sk_buff
*skb
,
2093 struct igbvf_buffer
*buffer_info
;
2094 struct pci_dev
*pdev
= adapter
->pdev
;
2095 unsigned int len
= skb_headlen(skb
);
2096 unsigned int count
= 0, i
;
2099 i
= tx_ring
->next_to_use
;
2101 buffer_info
= &tx_ring
->buffer_info
[i
];
2102 BUG_ON(len
>= IGBVF_MAX_DATA_PER_TXD
);
2103 buffer_info
->length
= len
;
2104 /* set time_stamp *before* dma to help avoid a possible race */
2105 buffer_info
->time_stamp
= jiffies
;
2106 buffer_info
->next_to_watch
= i
;
2107 buffer_info
->mapped_as_page
= false;
2108 buffer_info
->dma
= pci_map_single(pdev
, skb
->data
, len
,
2110 if (pci_dma_mapping_error(pdev
, buffer_info
->dma
))
2114 for (f
= 0; f
< skb_shinfo(skb
)->nr_frags
; f
++) {
2115 struct skb_frag_struct
*frag
;
2119 if (i
== tx_ring
->count
)
2122 frag
= &skb_shinfo(skb
)->frags
[f
];
2125 buffer_info
= &tx_ring
->buffer_info
[i
];
2126 BUG_ON(len
>= IGBVF_MAX_DATA_PER_TXD
);
2127 buffer_info
->length
= len
;
2128 buffer_info
->time_stamp
= jiffies
;
2129 buffer_info
->next_to_watch
= i
;
2130 buffer_info
->mapped_as_page
= true;
2131 buffer_info
->dma
= pci_map_page(pdev
,
2136 if (pci_dma_mapping_error(pdev
, buffer_info
->dma
))
2140 tx_ring
->buffer_info
[i
].skb
= skb
;
2141 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2146 dev_err(&pdev
->dev
, "TX DMA map failed\n");
2148 /* clear timestamp and dma mappings for failed buffer_info mapping */
2149 buffer_info
->dma
= 0;
2150 buffer_info
->time_stamp
= 0;
2151 buffer_info
->length
= 0;
2152 buffer_info
->next_to_watch
= 0;
2153 buffer_info
->mapped_as_page
= false;
2157 /* clear timestamp and dma mappings for remaining portion of packet */
2160 i
+= tx_ring
->count
;
2162 buffer_info
= &tx_ring
->buffer_info
[i
];
2163 igbvf_put_txbuf(adapter
, buffer_info
);
2169 static inline void igbvf_tx_queue_adv(struct igbvf_adapter
*adapter
,
2170 struct igbvf_ring
*tx_ring
,
2171 int tx_flags
, int count
, u32 paylen
,
2174 union e1000_adv_tx_desc
*tx_desc
= NULL
;
2175 struct igbvf_buffer
*buffer_info
;
2176 u32 olinfo_status
= 0, cmd_type_len
;
2179 cmd_type_len
= (E1000_ADVTXD_DTYP_DATA
| E1000_ADVTXD_DCMD_IFCS
|
2180 E1000_ADVTXD_DCMD_DEXT
);
2182 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
2183 cmd_type_len
|= E1000_ADVTXD_DCMD_VLE
;
2185 if (tx_flags
& IGBVF_TX_FLAGS_TSO
) {
2186 cmd_type_len
|= E1000_ADVTXD_DCMD_TSE
;
2188 /* insert tcp checksum */
2189 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2191 /* insert ip checksum */
2192 if (tx_flags
& IGBVF_TX_FLAGS_IPV4
)
2193 olinfo_status
|= E1000_TXD_POPTS_IXSM
<< 8;
2195 } else if (tx_flags
& IGBVF_TX_FLAGS_CSUM
) {
2196 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2199 olinfo_status
|= ((paylen
- hdr_len
) << E1000_ADVTXD_PAYLEN_SHIFT
);
2201 i
= tx_ring
->next_to_use
;
2203 buffer_info
= &tx_ring
->buffer_info
[i
];
2204 tx_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, i
);
2205 tx_desc
->read
.buffer_addr
= cpu_to_le64(buffer_info
->dma
);
2206 tx_desc
->read
.cmd_type_len
=
2207 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
2208 tx_desc
->read
.olinfo_status
= cpu_to_le32(olinfo_status
);
2210 if (i
== tx_ring
->count
)
2214 tx_desc
->read
.cmd_type_len
|= cpu_to_le32(adapter
->txd_cmd
);
2215 /* Force memory writes to complete before letting h/w
2216 * know there are new descriptors to fetch. (Only
2217 * applicable for weak-ordered memory model archs,
2218 * such as IA-64). */
2221 tx_ring
->next_to_use
= i
;
2222 writel(i
, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
2223 /* we need this if more than one processor can write to our tail
2224 * at a time, it syncronizes IO on IA64/Altix systems */
2228 static netdev_tx_t
igbvf_xmit_frame_ring_adv(struct sk_buff
*skb
,
2229 struct net_device
*netdev
,
2230 struct igbvf_ring
*tx_ring
)
2232 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2233 unsigned int first
, tx_flags
= 0;
2238 if (test_bit(__IGBVF_DOWN
, &adapter
->state
)) {
2239 dev_kfree_skb_any(skb
);
2240 return NETDEV_TX_OK
;
2243 if (skb
->len
<= 0) {
2244 dev_kfree_skb_any(skb
);
2245 return NETDEV_TX_OK
;
2249 * need: count + 4 desc gap to keep tail from touching
2250 * + 2 desc gap to keep tail from touching head,
2251 * + 1 desc for skb->data,
2252 * + 1 desc for context descriptor,
2253 * head, otherwise try next time
2255 if (igbvf_maybe_stop_tx(netdev
, skb_shinfo(skb
)->nr_frags
+ 4)) {
2256 /* this is a hard error */
2257 return NETDEV_TX_BUSY
;
2260 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
2261 tx_flags
|= IGBVF_TX_FLAGS_VLAN
;
2262 tx_flags
|= (vlan_tx_tag_get(skb
) << IGBVF_TX_FLAGS_VLAN_SHIFT
);
2265 if (skb
->protocol
== htons(ETH_P_IP
))
2266 tx_flags
|= IGBVF_TX_FLAGS_IPV4
;
2268 first
= tx_ring
->next_to_use
;
2270 tso
= skb_is_gso(skb
) ?
2271 igbvf_tso(adapter
, tx_ring
, skb
, tx_flags
, &hdr_len
) : 0;
2272 if (unlikely(tso
< 0)) {
2273 dev_kfree_skb_any(skb
);
2274 return NETDEV_TX_OK
;
2278 tx_flags
|= IGBVF_TX_FLAGS_TSO
;
2279 else if (igbvf_tx_csum(adapter
, tx_ring
, skb
, tx_flags
) &&
2280 (skb
->ip_summed
== CHECKSUM_PARTIAL
))
2281 tx_flags
|= IGBVF_TX_FLAGS_CSUM
;
2284 * count reflects descriptors mapped, if 0 then mapping error
2285 * has occured and we need to rewind the descriptor queue
2287 count
= igbvf_tx_map_adv(adapter
, tx_ring
, skb
, first
);
2290 igbvf_tx_queue_adv(adapter
, tx_ring
, tx_flags
, count
,
2292 /* Make sure there is space in the ring for the next send. */
2293 igbvf_maybe_stop_tx(netdev
, MAX_SKB_FRAGS
+ 4);
2295 dev_kfree_skb_any(skb
);
2296 tx_ring
->buffer_info
[first
].time_stamp
= 0;
2297 tx_ring
->next_to_use
= first
;
2300 return NETDEV_TX_OK
;
2303 static netdev_tx_t
igbvf_xmit_frame(struct sk_buff
*skb
,
2304 struct net_device
*netdev
)
2306 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2307 struct igbvf_ring
*tx_ring
;
2309 if (test_bit(__IGBVF_DOWN
, &adapter
->state
)) {
2310 dev_kfree_skb_any(skb
);
2311 return NETDEV_TX_OK
;
2314 tx_ring
= &adapter
->tx_ring
[0];
2316 return igbvf_xmit_frame_ring_adv(skb
, netdev
, tx_ring
);
2320 * igbvf_tx_timeout - Respond to a Tx Hang
2321 * @netdev: network interface device structure
2323 static void igbvf_tx_timeout(struct net_device
*netdev
)
2325 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2327 /* Do the reset outside of interrupt context */
2328 adapter
->tx_timeout_count
++;
2329 schedule_work(&adapter
->reset_task
);
2332 static void igbvf_reset_task(struct work_struct
*work
)
2334 struct igbvf_adapter
*adapter
;
2335 adapter
= container_of(work
, struct igbvf_adapter
, reset_task
);
2337 igbvf_reinit_locked(adapter
);
2341 * igbvf_get_stats - Get System Network Statistics
2342 * @netdev: network interface device structure
2344 * Returns the address of the device statistics structure.
2345 * The statistics are actually updated from the timer callback.
2347 static struct net_device_stats
*igbvf_get_stats(struct net_device
*netdev
)
2349 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2351 /* only return the current stats */
2352 return &adapter
->net_stats
;
2356 * igbvf_change_mtu - Change the Maximum Transfer Unit
2357 * @netdev: network interface device structure
2358 * @new_mtu: new value for maximum frame size
2360 * Returns 0 on success, negative on failure
2362 static int igbvf_change_mtu(struct net_device
*netdev
, int new_mtu
)
2364 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2365 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
2367 if ((new_mtu
< 68) || (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
2368 dev_err(&adapter
->pdev
->dev
, "Invalid MTU setting\n");
2372 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2373 if (max_frame
> MAX_STD_JUMBO_FRAME_SIZE
) {
2374 dev_err(&adapter
->pdev
->dev
, "MTU > 9216 not supported.\n");
2378 while (test_and_set_bit(__IGBVF_RESETTING
, &adapter
->state
))
2380 /* igbvf_down has a dependency on max_frame_size */
2381 adapter
->max_frame_size
= max_frame
;
2382 if (netif_running(netdev
))
2383 igbvf_down(adapter
);
2386 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2387 * means we reserve 2 more, this pushes us to allocate from the next
2389 * i.e. RXBUFFER_2048 --> size-4096 slab
2390 * However with the new *_jumbo_rx* routines, jumbo receives will use
2394 if (max_frame
<= 1024)
2395 adapter
->rx_buffer_len
= 1024;
2396 else if (max_frame
<= 2048)
2397 adapter
->rx_buffer_len
= 2048;
2399 #if (PAGE_SIZE / 2) > 16384
2400 adapter
->rx_buffer_len
= 16384;
2402 adapter
->rx_buffer_len
= PAGE_SIZE
/ 2;
2406 /* adjust allocation if LPE protects us, and we aren't using SBP */
2407 if ((max_frame
== ETH_FRAME_LEN
+ ETH_FCS_LEN
) ||
2408 (max_frame
== ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
))
2409 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+
2412 dev_info(&adapter
->pdev
->dev
, "changing MTU from %d to %d\n",
2413 netdev
->mtu
, new_mtu
);
2414 netdev
->mtu
= new_mtu
;
2416 if (netif_running(netdev
))
2419 igbvf_reset(adapter
);
2421 clear_bit(__IGBVF_RESETTING
, &adapter
->state
);
2426 static int igbvf_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
2434 static int igbvf_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2436 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2437 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2442 netif_device_detach(netdev
);
2444 if (netif_running(netdev
)) {
2445 WARN_ON(test_bit(__IGBVF_RESETTING
, &adapter
->state
));
2446 igbvf_down(adapter
);
2447 igbvf_free_irq(adapter
);
2451 retval
= pci_save_state(pdev
);
2456 pci_disable_device(pdev
);
2462 static int igbvf_resume(struct pci_dev
*pdev
)
2464 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2465 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2468 pci_restore_state(pdev
);
2469 err
= pci_enable_device_mem(pdev
);
2471 dev_err(&pdev
->dev
, "Cannot enable PCI device from suspend\n");
2475 pci_set_master(pdev
);
2477 if (netif_running(netdev
)) {
2478 err
= igbvf_request_irq(adapter
);
2483 igbvf_reset(adapter
);
2485 if (netif_running(netdev
))
2488 netif_device_attach(netdev
);
2494 static void igbvf_shutdown(struct pci_dev
*pdev
)
2496 igbvf_suspend(pdev
, PMSG_SUSPEND
);
2499 #ifdef CONFIG_NET_POLL_CONTROLLER
2501 * Polling 'interrupt' - used by things like netconsole to send skbs
2502 * without having to re-enable interrupts. It's not called while
2503 * the interrupt routine is executing.
2505 static void igbvf_netpoll(struct net_device
*netdev
)
2507 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2509 disable_irq(adapter
->pdev
->irq
);
2511 igbvf_clean_tx_irq(adapter
->tx_ring
);
2513 enable_irq(adapter
->pdev
->irq
);
2518 * igbvf_io_error_detected - called when PCI error is detected
2519 * @pdev: Pointer to PCI device
2520 * @state: The current pci connection state
2522 * This function is called after a PCI bus error affecting
2523 * this device has been detected.
2525 static pci_ers_result_t
igbvf_io_error_detected(struct pci_dev
*pdev
,
2526 pci_channel_state_t state
)
2528 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2529 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2531 netif_device_detach(netdev
);
2533 if (state
== pci_channel_io_perm_failure
)
2534 return PCI_ERS_RESULT_DISCONNECT
;
2536 if (netif_running(netdev
))
2537 igbvf_down(adapter
);
2538 pci_disable_device(pdev
);
2540 /* Request a slot slot reset. */
2541 return PCI_ERS_RESULT_NEED_RESET
;
2545 * igbvf_io_slot_reset - called after the pci bus has been reset.
2546 * @pdev: Pointer to PCI device
2548 * Restart the card from scratch, as if from a cold-boot. Implementation
2549 * resembles the first-half of the igbvf_resume routine.
2551 static pci_ers_result_t
igbvf_io_slot_reset(struct pci_dev
*pdev
)
2553 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2554 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2556 if (pci_enable_device_mem(pdev
)) {
2558 "Cannot re-enable PCI device after reset.\n");
2559 return PCI_ERS_RESULT_DISCONNECT
;
2561 pci_set_master(pdev
);
2563 igbvf_reset(adapter
);
2565 return PCI_ERS_RESULT_RECOVERED
;
2569 * igbvf_io_resume - called when traffic can start flowing again.
2570 * @pdev: Pointer to PCI device
2572 * This callback is called when the error recovery driver tells us that
2573 * its OK to resume normal operation. Implementation resembles the
2574 * second-half of the igbvf_resume routine.
2576 static void igbvf_io_resume(struct pci_dev
*pdev
)
2578 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2579 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2581 if (netif_running(netdev
)) {
2582 if (igbvf_up(adapter
)) {
2584 "can't bring device back up after reset\n");
2589 netif_device_attach(netdev
);
2592 static void igbvf_print_device_info(struct igbvf_adapter
*adapter
)
2594 struct e1000_hw
*hw
= &adapter
->hw
;
2595 struct net_device
*netdev
= adapter
->netdev
;
2596 struct pci_dev
*pdev
= adapter
->pdev
;
2598 dev_info(&pdev
->dev
, "Intel(R) 82576 Virtual Function\n");
2599 dev_info(&pdev
->dev
, "Address: %pM\n", netdev
->dev_addr
);
2600 dev_info(&pdev
->dev
, "MAC: %d\n", hw
->mac
.type
);
2603 static const struct net_device_ops igbvf_netdev_ops
= {
2604 .ndo_open
= igbvf_open
,
2605 .ndo_stop
= igbvf_close
,
2606 .ndo_start_xmit
= igbvf_xmit_frame
,
2607 .ndo_get_stats
= igbvf_get_stats
,
2608 .ndo_set_multicast_list
= igbvf_set_multi
,
2609 .ndo_set_mac_address
= igbvf_set_mac
,
2610 .ndo_change_mtu
= igbvf_change_mtu
,
2611 .ndo_do_ioctl
= igbvf_ioctl
,
2612 .ndo_tx_timeout
= igbvf_tx_timeout
,
2613 .ndo_vlan_rx_register
= igbvf_vlan_rx_register
,
2614 .ndo_vlan_rx_add_vid
= igbvf_vlan_rx_add_vid
,
2615 .ndo_vlan_rx_kill_vid
= igbvf_vlan_rx_kill_vid
,
2616 #ifdef CONFIG_NET_POLL_CONTROLLER
2617 .ndo_poll_controller
= igbvf_netpoll
,
2622 * igbvf_probe - Device Initialization Routine
2623 * @pdev: PCI device information struct
2624 * @ent: entry in igbvf_pci_tbl
2626 * Returns 0 on success, negative on failure
2628 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2629 * The OS initialization, configuring of the adapter private structure,
2630 * and a hardware reset occur.
2632 static int __devinit
igbvf_probe(struct pci_dev
*pdev
,
2633 const struct pci_device_id
*ent
)
2635 struct net_device
*netdev
;
2636 struct igbvf_adapter
*adapter
;
2637 struct e1000_hw
*hw
;
2638 const struct igbvf_info
*ei
= igbvf_info_tbl
[ent
->driver_data
];
2640 static int cards_found
;
2641 int err
, pci_using_dac
;
2643 err
= pci_enable_device_mem(pdev
);
2648 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(64));
2650 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
2654 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
2656 err
= pci_set_consistent_dma_mask(pdev
,
2659 dev_err(&pdev
->dev
, "No usable DMA "
2660 "configuration, aborting\n");
2666 err
= pci_request_regions(pdev
, igbvf_driver_name
);
2670 pci_set_master(pdev
);
2673 netdev
= alloc_etherdev(sizeof(struct igbvf_adapter
));
2675 goto err_alloc_etherdev
;
2677 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
2679 pci_set_drvdata(pdev
, netdev
);
2680 adapter
= netdev_priv(netdev
);
2682 adapter
->netdev
= netdev
;
2683 adapter
->pdev
= pdev
;
2685 adapter
->pba
= ei
->pba
;
2686 adapter
->flags
= ei
->flags
;
2687 adapter
->hw
.back
= adapter
;
2688 adapter
->hw
.mac
.type
= ei
->mac
;
2689 adapter
->msg_enable
= (1 << NETIF_MSG_DRV
| NETIF_MSG_PROBE
) - 1;
2691 /* PCI config space info */
2693 hw
->vendor_id
= pdev
->vendor
;
2694 hw
->device_id
= pdev
->device
;
2695 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
2696 hw
->subsystem_device_id
= pdev
->subsystem_device
;
2698 pci_read_config_byte(pdev
, PCI_REVISION_ID
, &hw
->revision_id
);
2701 adapter
->hw
.hw_addr
= ioremap(pci_resource_start(pdev
, 0),
2702 pci_resource_len(pdev
, 0));
2704 if (!adapter
->hw
.hw_addr
)
2707 if (ei
->get_variants
) {
2708 err
= ei
->get_variants(adapter
);
2713 /* setup adapter struct */
2714 err
= igbvf_sw_init(adapter
);
2718 /* construct the net_device struct */
2719 netdev
->netdev_ops
= &igbvf_netdev_ops
;
2721 igbvf_set_ethtool_ops(netdev
);
2722 netdev
->watchdog_timeo
= 5 * HZ
;
2723 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
2725 adapter
->bd_number
= cards_found
++;
2727 netdev
->features
= NETIF_F_SG
|
2729 NETIF_F_HW_VLAN_TX
|
2730 NETIF_F_HW_VLAN_RX
|
2731 NETIF_F_HW_VLAN_FILTER
;
2733 netdev
->features
|= NETIF_F_IPV6_CSUM
;
2734 netdev
->features
|= NETIF_F_TSO
;
2735 netdev
->features
|= NETIF_F_TSO6
;
2738 netdev
->features
|= NETIF_F_HIGHDMA
;
2740 netdev
->vlan_features
|= NETIF_F_TSO
;
2741 netdev
->vlan_features
|= NETIF_F_TSO6
;
2742 netdev
->vlan_features
|= NETIF_F_IP_CSUM
;
2743 netdev
->vlan_features
|= NETIF_F_IPV6_CSUM
;
2744 netdev
->vlan_features
|= NETIF_F_SG
;
2746 /*reset the controller to put the device in a known good state */
2747 err
= hw
->mac
.ops
.reset_hw(hw
);
2749 dev_info(&pdev
->dev
,
2750 "PF still in reset state, assigning new address."
2751 " Is the PF interface up?\n");
2752 random_ether_addr(hw
->mac
.addr
);
2754 err
= hw
->mac
.ops
.read_mac_addr(hw
);
2756 dev_err(&pdev
->dev
, "Error reading MAC address\n");
2761 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
2762 memcpy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
2764 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
2765 dev_err(&pdev
->dev
, "Invalid MAC Address: %pM\n",
2771 setup_timer(&adapter
->watchdog_timer
, &igbvf_watchdog
,
2772 (unsigned long) adapter
);
2774 INIT_WORK(&adapter
->reset_task
, igbvf_reset_task
);
2775 INIT_WORK(&adapter
->watchdog_task
, igbvf_watchdog_task
);
2777 /* ring size defaults */
2778 adapter
->rx_ring
->count
= 1024;
2779 adapter
->tx_ring
->count
= 1024;
2781 /* reset the hardware with the new settings */
2782 igbvf_reset(adapter
);
2784 /* tell the stack to leave us alone until igbvf_open() is called */
2785 netif_carrier_off(netdev
);
2786 netif_stop_queue(netdev
);
2788 strcpy(netdev
->name
, "eth%d");
2789 err
= register_netdev(netdev
);
2793 igbvf_print_device_info(adapter
);
2795 igbvf_initialize_last_counter_stats(adapter
);
2800 kfree(adapter
->tx_ring
);
2801 kfree(adapter
->rx_ring
);
2803 igbvf_reset_interrupt_capability(adapter
);
2804 iounmap(adapter
->hw
.hw_addr
);
2806 free_netdev(netdev
);
2808 pci_release_regions(pdev
);
2811 pci_disable_device(pdev
);
2816 * igbvf_remove - Device Removal Routine
2817 * @pdev: PCI device information struct
2819 * igbvf_remove is called by the PCI subsystem to alert the driver
2820 * that it should release a PCI device. The could be caused by a
2821 * Hot-Plug event, or because the driver is going to be removed from
2824 static void __devexit
igbvf_remove(struct pci_dev
*pdev
)
2826 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2827 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2828 struct e1000_hw
*hw
= &adapter
->hw
;
2831 * flush_scheduled work may reschedule our watchdog task, so
2832 * explicitly disable watchdog tasks from being rescheduled
2834 set_bit(__IGBVF_DOWN
, &adapter
->state
);
2835 del_timer_sync(&adapter
->watchdog_timer
);
2837 flush_scheduled_work();
2839 unregister_netdev(netdev
);
2841 igbvf_reset_interrupt_capability(adapter
);
2844 * it is important to delete the napi struct prior to freeing the
2845 * rx ring so that you do not end up with null pointer refs
2847 netif_napi_del(&adapter
->rx_ring
->napi
);
2848 kfree(adapter
->tx_ring
);
2849 kfree(adapter
->rx_ring
);
2851 iounmap(hw
->hw_addr
);
2852 if (hw
->flash_address
)
2853 iounmap(hw
->flash_address
);
2854 pci_release_regions(pdev
);
2856 free_netdev(netdev
);
2858 pci_disable_device(pdev
);
2861 /* PCI Error Recovery (ERS) */
2862 static struct pci_error_handlers igbvf_err_handler
= {
2863 .error_detected
= igbvf_io_error_detected
,
2864 .slot_reset
= igbvf_io_slot_reset
,
2865 .resume
= igbvf_io_resume
,
2868 static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl
) = {
2869 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82576_VF
), board_vf
},
2870 { } /* terminate list */
2872 MODULE_DEVICE_TABLE(pci
, igbvf_pci_tbl
);
2874 /* PCI Device API Driver */
2875 static struct pci_driver igbvf_driver
= {
2876 .name
= igbvf_driver_name
,
2877 .id_table
= igbvf_pci_tbl
,
2878 .probe
= igbvf_probe
,
2879 .remove
= __devexit_p(igbvf_remove
),
2881 /* Power Management Hooks */
2882 .suspend
= igbvf_suspend
,
2883 .resume
= igbvf_resume
,
2885 .shutdown
= igbvf_shutdown
,
2886 .err_handler
= &igbvf_err_handler
2890 * igbvf_init_module - Driver Registration Routine
2892 * igbvf_init_module is the first routine called when the driver is
2893 * loaded. All it does is register with the PCI subsystem.
2895 static int __init
igbvf_init_module(void)
2898 printk(KERN_INFO
"%s - version %s\n",
2899 igbvf_driver_string
, igbvf_driver_version
);
2900 printk(KERN_INFO
"%s\n", igbvf_copyright
);
2902 ret
= pci_register_driver(&igbvf_driver
);
2903 igbvf_driver_pm_qos_req
= pm_qos_add_request(PM_QOS_CPU_DMA_LATENCY
,
2904 PM_QOS_DEFAULT_VALUE
);
2908 module_init(igbvf_init_module
);
2911 * igbvf_exit_module - Driver Exit Cleanup Routine
2913 * igbvf_exit_module is called just before the driver is removed
2916 static void __exit
igbvf_exit_module(void)
2918 pci_unregister_driver(&igbvf_driver
);
2919 pm_qos_remove_request(igbvf_driver_pm_qos_req
);
2920 igbvf_driver_pm_qos_req
= NULL
;
2922 module_exit(igbvf_exit_module
);
2925 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2926 MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver");
2927 MODULE_LICENSE("GPL");
2928 MODULE_VERSION(DRV_VERSION
);