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 static 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_checksum_none_assert(skb
);
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 dma_map_page(&pdev
->dev
, 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
= dma_map_single(&pdev
->dev
, 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
)
251 rmb(); /* read descriptor and rx_buffer_info after status DD */
253 buffer_info
= &rx_ring
->buffer_info
[i
];
255 /* HW will not DMA in data larger than the given buffer, even
256 * if it parses the (NFS, of course) header to be larger. In
257 * that case, it fills the header buffer and spills the rest
260 hlen
= (le16_to_cpu(rx_desc
->wb
.lower
.lo_dword
.hs_rss
.hdr_info
) &
261 E1000_RXDADV_HDRBUFLEN_MASK
) >> E1000_RXDADV_HDRBUFLEN_SHIFT
;
262 if (hlen
> adapter
->rx_ps_hdr_size
)
263 hlen
= adapter
->rx_ps_hdr_size
;
265 length
= le16_to_cpu(rx_desc
->wb
.upper
.length
);
269 skb
= buffer_info
->skb
;
270 prefetch(skb
->data
- NET_IP_ALIGN
);
271 buffer_info
->skb
= NULL
;
272 if (!adapter
->rx_ps_hdr_size
) {
273 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
274 adapter
->rx_buffer_len
,
276 buffer_info
->dma
= 0;
277 skb_put(skb
, length
);
281 if (!skb_shinfo(skb
)->nr_frags
) {
282 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
283 adapter
->rx_ps_hdr_size
,
289 dma_unmap_page(&pdev
->dev
, buffer_info
->page_dma
,
292 buffer_info
->page_dma
= 0;
294 skb_fill_page_desc(skb
, skb_shinfo(skb
)->nr_frags
,
296 buffer_info
->page_offset
,
299 if ((adapter
->rx_buffer_len
> (PAGE_SIZE
/ 2)) ||
300 (page_count(buffer_info
->page
) != 1))
301 buffer_info
->page
= NULL
;
303 get_page(buffer_info
->page
);
306 skb
->data_len
+= length
;
307 skb
->truesize
+= length
;
311 if (i
== rx_ring
->count
)
313 next_rxd
= IGBVF_RX_DESC_ADV(*rx_ring
, i
);
315 next_buffer
= &rx_ring
->buffer_info
[i
];
317 if (!(staterr
& E1000_RXD_STAT_EOP
)) {
318 buffer_info
->skb
= next_buffer
->skb
;
319 buffer_info
->dma
= next_buffer
->dma
;
320 next_buffer
->skb
= skb
;
321 next_buffer
->dma
= 0;
325 if (staterr
& E1000_RXDEXT_ERR_FRAME_ERR_MASK
) {
326 dev_kfree_skb_irq(skb
);
330 total_bytes
+= skb
->len
;
333 igbvf_rx_checksum_adv(adapter
, staterr
, skb
);
335 skb
->protocol
= eth_type_trans(skb
, netdev
);
337 igbvf_receive_skb(adapter
, netdev
, skb
, staterr
,
338 rx_desc
->wb
.upper
.vlan
);
341 rx_desc
->wb
.upper
.status_error
= 0;
343 /* return some buffers to hardware, one at a time is too slow */
344 if (cleaned_count
>= IGBVF_RX_BUFFER_WRITE
) {
345 igbvf_alloc_rx_buffers(rx_ring
, cleaned_count
);
349 /* use prefetched values */
351 buffer_info
= next_buffer
;
353 staterr
= le32_to_cpu(rx_desc
->wb
.upper
.status_error
);
356 rx_ring
->next_to_clean
= i
;
357 cleaned_count
= igbvf_desc_unused(rx_ring
);
360 igbvf_alloc_rx_buffers(rx_ring
, cleaned_count
);
362 adapter
->total_rx_packets
+= total_packets
;
363 adapter
->total_rx_bytes
+= total_bytes
;
364 adapter
->net_stats
.rx_bytes
+= total_bytes
;
365 adapter
->net_stats
.rx_packets
+= total_packets
;
369 static void igbvf_put_txbuf(struct igbvf_adapter
*adapter
,
370 struct igbvf_buffer
*buffer_info
)
372 if (buffer_info
->dma
) {
373 if (buffer_info
->mapped_as_page
)
374 dma_unmap_page(&adapter
->pdev
->dev
,
379 dma_unmap_single(&adapter
->pdev
->dev
,
383 buffer_info
->dma
= 0;
385 if (buffer_info
->skb
) {
386 dev_kfree_skb_any(buffer_info
->skb
);
387 buffer_info
->skb
= NULL
;
389 buffer_info
->time_stamp
= 0;
392 static void igbvf_print_tx_hang(struct igbvf_adapter
*adapter
)
394 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
395 unsigned int i
= tx_ring
->next_to_clean
;
396 unsigned int eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
397 union e1000_adv_tx_desc
*eop_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, eop
);
399 /* detected Tx unit hang */
400 dev_err(&adapter
->pdev
->dev
,
401 "Detected Tx Unit Hang:\n"
404 " next_to_use <%x>\n"
405 " next_to_clean <%x>\n"
406 "buffer_info[next_to_clean]:\n"
407 " time_stamp <%lx>\n"
408 " next_to_watch <%x>\n"
410 " next_to_watch.status <%x>\n",
411 readl(adapter
->hw
.hw_addr
+ tx_ring
->head
),
412 readl(adapter
->hw
.hw_addr
+ tx_ring
->tail
),
413 tx_ring
->next_to_use
,
414 tx_ring
->next_to_clean
,
415 tx_ring
->buffer_info
[eop
].time_stamp
,
418 eop_desc
->wb
.status
);
422 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
423 * @adapter: board private structure
425 * Return 0 on success, negative on failure
427 int igbvf_setup_tx_resources(struct igbvf_adapter
*adapter
,
428 struct igbvf_ring
*tx_ring
)
430 struct pci_dev
*pdev
= adapter
->pdev
;
433 size
= sizeof(struct igbvf_buffer
) * tx_ring
->count
;
434 tx_ring
->buffer_info
= vmalloc(size
);
435 if (!tx_ring
->buffer_info
)
437 memset(tx_ring
->buffer_info
, 0, size
);
439 /* round up to nearest 4K */
440 tx_ring
->size
= tx_ring
->count
* sizeof(union e1000_adv_tx_desc
);
441 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
443 tx_ring
->desc
= dma_alloc_coherent(&pdev
->dev
, tx_ring
->size
,
444 &tx_ring
->dma
, GFP_KERNEL
);
449 tx_ring
->adapter
= adapter
;
450 tx_ring
->next_to_use
= 0;
451 tx_ring
->next_to_clean
= 0;
455 vfree(tx_ring
->buffer_info
);
456 dev_err(&adapter
->pdev
->dev
,
457 "Unable to allocate memory for the transmit descriptor ring\n");
462 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
463 * @adapter: board private structure
465 * Returns 0 on success, negative on failure
467 int igbvf_setup_rx_resources(struct igbvf_adapter
*adapter
,
468 struct igbvf_ring
*rx_ring
)
470 struct pci_dev
*pdev
= adapter
->pdev
;
473 size
= sizeof(struct igbvf_buffer
) * rx_ring
->count
;
474 rx_ring
->buffer_info
= vmalloc(size
);
475 if (!rx_ring
->buffer_info
)
477 memset(rx_ring
->buffer_info
, 0, size
);
479 desc_len
= sizeof(union e1000_adv_rx_desc
);
481 /* Round up to nearest 4K */
482 rx_ring
->size
= rx_ring
->count
* desc_len
;
483 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
485 rx_ring
->desc
= dma_alloc_coherent(&pdev
->dev
, rx_ring
->size
,
486 &rx_ring
->dma
, GFP_KERNEL
);
491 rx_ring
->next_to_clean
= 0;
492 rx_ring
->next_to_use
= 0;
494 rx_ring
->adapter
= adapter
;
499 vfree(rx_ring
->buffer_info
);
500 rx_ring
->buffer_info
= NULL
;
501 dev_err(&adapter
->pdev
->dev
,
502 "Unable to allocate memory for the receive descriptor ring\n");
507 * igbvf_clean_tx_ring - Free Tx Buffers
508 * @tx_ring: ring to be cleaned
510 static void igbvf_clean_tx_ring(struct igbvf_ring
*tx_ring
)
512 struct igbvf_adapter
*adapter
= tx_ring
->adapter
;
513 struct igbvf_buffer
*buffer_info
;
517 if (!tx_ring
->buffer_info
)
520 /* Free all the Tx ring sk_buffs */
521 for (i
= 0; i
< tx_ring
->count
; i
++) {
522 buffer_info
= &tx_ring
->buffer_info
[i
];
523 igbvf_put_txbuf(adapter
, buffer_info
);
526 size
= sizeof(struct igbvf_buffer
) * tx_ring
->count
;
527 memset(tx_ring
->buffer_info
, 0, size
);
529 /* Zero out the descriptor ring */
530 memset(tx_ring
->desc
, 0, tx_ring
->size
);
532 tx_ring
->next_to_use
= 0;
533 tx_ring
->next_to_clean
= 0;
535 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->head
);
536 writel(0, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
540 * igbvf_free_tx_resources - Free Tx Resources per Queue
541 * @tx_ring: ring to free resources from
543 * Free all transmit software resources
545 void igbvf_free_tx_resources(struct igbvf_ring
*tx_ring
)
547 struct pci_dev
*pdev
= tx_ring
->adapter
->pdev
;
549 igbvf_clean_tx_ring(tx_ring
);
551 vfree(tx_ring
->buffer_info
);
552 tx_ring
->buffer_info
= NULL
;
554 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
557 tx_ring
->desc
= NULL
;
561 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
562 * @adapter: board private structure
564 static void igbvf_clean_rx_ring(struct igbvf_ring
*rx_ring
)
566 struct igbvf_adapter
*adapter
= rx_ring
->adapter
;
567 struct igbvf_buffer
*buffer_info
;
568 struct pci_dev
*pdev
= adapter
->pdev
;
572 if (!rx_ring
->buffer_info
)
575 /* Free all the Rx ring sk_buffs */
576 for (i
= 0; i
< rx_ring
->count
; i
++) {
577 buffer_info
= &rx_ring
->buffer_info
[i
];
578 if (buffer_info
->dma
) {
579 if (adapter
->rx_ps_hdr_size
){
580 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
581 adapter
->rx_ps_hdr_size
,
584 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
585 adapter
->rx_buffer_len
,
588 buffer_info
->dma
= 0;
591 if (buffer_info
->skb
) {
592 dev_kfree_skb(buffer_info
->skb
);
593 buffer_info
->skb
= NULL
;
596 if (buffer_info
->page
) {
597 if (buffer_info
->page_dma
)
598 dma_unmap_page(&pdev
->dev
,
599 buffer_info
->page_dma
,
602 put_page(buffer_info
->page
);
603 buffer_info
->page
= NULL
;
604 buffer_info
->page_dma
= 0;
605 buffer_info
->page_offset
= 0;
609 size
= sizeof(struct igbvf_buffer
) * rx_ring
->count
;
610 memset(rx_ring
->buffer_info
, 0, size
);
612 /* Zero out the descriptor ring */
613 memset(rx_ring
->desc
, 0, rx_ring
->size
);
615 rx_ring
->next_to_clean
= 0;
616 rx_ring
->next_to_use
= 0;
618 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->head
);
619 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
623 * igbvf_free_rx_resources - Free Rx Resources
624 * @rx_ring: ring to clean the resources from
626 * Free all receive software resources
629 void igbvf_free_rx_resources(struct igbvf_ring
*rx_ring
)
631 struct pci_dev
*pdev
= rx_ring
->adapter
->pdev
;
633 igbvf_clean_rx_ring(rx_ring
);
635 vfree(rx_ring
->buffer_info
);
636 rx_ring
->buffer_info
= NULL
;
638 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
640 rx_ring
->desc
= NULL
;
644 * igbvf_update_itr - update the dynamic ITR value based on statistics
645 * @adapter: pointer to adapter
646 * @itr_setting: current adapter->itr
647 * @packets: the number of packets during this measurement interval
648 * @bytes: the number of bytes during this measurement interval
650 * Stores a new ITR value based on packets and byte
651 * counts during the last interrupt. The advantage of per interrupt
652 * computation is faster updates and more accurate ITR for the current
653 * traffic pattern. Constants in this function were computed
654 * based on theoretical maximum wire speed and thresholds were set based
655 * on testing data as well as attempting to minimize response time
656 * while increasing bulk throughput. This functionality is controlled
657 * by the InterruptThrottleRate module parameter.
659 static unsigned int igbvf_update_itr(struct igbvf_adapter
*adapter
,
660 u16 itr_setting
, int packets
,
663 unsigned int retval
= itr_setting
;
666 goto update_itr_done
;
668 switch (itr_setting
) {
670 /* handle TSO and jumbo frames */
671 if (bytes
/packets
> 8000)
672 retval
= bulk_latency
;
673 else if ((packets
< 5) && (bytes
> 512))
674 retval
= low_latency
;
676 case low_latency
: /* 50 usec aka 20000 ints/s */
678 /* this if handles the TSO accounting */
679 if (bytes
/packets
> 8000)
680 retval
= bulk_latency
;
681 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
682 retval
= bulk_latency
;
683 else if ((packets
> 35))
684 retval
= lowest_latency
;
685 } else if (bytes
/packets
> 2000) {
686 retval
= bulk_latency
;
687 } else if (packets
<= 2 && bytes
< 512) {
688 retval
= lowest_latency
;
691 case bulk_latency
: /* 250 usec aka 4000 ints/s */
694 retval
= low_latency
;
695 } else if (bytes
< 6000) {
696 retval
= low_latency
;
705 static void igbvf_set_itr(struct igbvf_adapter
*adapter
)
707 struct e1000_hw
*hw
= &adapter
->hw
;
709 u32 new_itr
= adapter
->itr
;
711 adapter
->tx_itr
= igbvf_update_itr(adapter
, adapter
->tx_itr
,
712 adapter
->total_tx_packets
,
713 adapter
->total_tx_bytes
);
714 /* conservative mode (itr 3) eliminates the lowest_latency setting */
715 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
716 adapter
->tx_itr
= low_latency
;
718 adapter
->rx_itr
= igbvf_update_itr(adapter
, adapter
->rx_itr
,
719 adapter
->total_rx_packets
,
720 adapter
->total_rx_bytes
);
721 /* conservative mode (itr 3) eliminates the lowest_latency setting */
722 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
723 adapter
->rx_itr
= low_latency
;
725 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
727 switch (current_itr
) {
728 /* counts and packets in update_itr are dependent on these numbers */
733 new_itr
= 20000; /* aka hwitr = ~200 */
742 if (new_itr
!= adapter
->itr
) {
744 * this attempts to bias the interrupt rate towards Bulk
745 * by adding intermediate steps when interrupt rate is
748 new_itr
= new_itr
> adapter
->itr
?
749 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
751 adapter
->itr
= new_itr
;
752 adapter
->rx_ring
->itr_val
= 1952;
754 if (adapter
->msix_entries
)
755 adapter
->rx_ring
->set_itr
= 1;
762 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
763 * @adapter: board private structure
764 * returns true if ring is completely cleaned
766 static bool igbvf_clean_tx_irq(struct igbvf_ring
*tx_ring
)
768 struct igbvf_adapter
*adapter
= tx_ring
->adapter
;
769 struct e1000_hw
*hw
= &adapter
->hw
;
770 struct net_device
*netdev
= adapter
->netdev
;
771 struct igbvf_buffer
*buffer_info
;
773 union e1000_adv_tx_desc
*tx_desc
, *eop_desc
;
774 unsigned int total_bytes
= 0, total_packets
= 0;
775 unsigned int i
, eop
, count
= 0;
776 bool cleaned
= false;
778 i
= tx_ring
->next_to_clean
;
779 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
780 eop_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, eop
);
782 while ((eop_desc
->wb
.status
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
783 (count
< tx_ring
->count
)) {
784 rmb(); /* read buffer_info after eop_desc status */
785 for (cleaned
= false; !cleaned
; count
++) {
786 tx_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, i
);
787 buffer_info
= &tx_ring
->buffer_info
[i
];
788 cleaned
= (i
== eop
);
789 skb
= buffer_info
->skb
;
792 unsigned int segs
, bytecount
;
794 /* gso_segs is currently only valid for tcp */
795 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
796 /* multiply data chunks by size of headers */
797 bytecount
= ((segs
- 1) * skb_headlen(skb
)) +
799 total_packets
+= segs
;
800 total_bytes
+= bytecount
;
803 igbvf_put_txbuf(adapter
, buffer_info
);
804 tx_desc
->wb
.status
= 0;
807 if (i
== tx_ring
->count
)
810 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
811 eop_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, eop
);
814 tx_ring
->next_to_clean
= i
;
816 if (unlikely(count
&&
817 netif_carrier_ok(netdev
) &&
818 igbvf_desc_unused(tx_ring
) >= IGBVF_TX_QUEUE_WAKE
)) {
819 /* Make sure that anybody stopping the queue after this
820 * sees the new next_to_clean.
823 if (netif_queue_stopped(netdev
) &&
824 !(test_bit(__IGBVF_DOWN
, &adapter
->state
))) {
825 netif_wake_queue(netdev
);
826 ++adapter
->restart_queue
;
830 if (adapter
->detect_tx_hung
) {
831 /* Detect a transmit hang in hardware, this serializes the
832 * check with the clearing of time_stamp and movement of i */
833 adapter
->detect_tx_hung
= false;
834 if (tx_ring
->buffer_info
[i
].time_stamp
&&
835 time_after(jiffies
, tx_ring
->buffer_info
[i
].time_stamp
+
836 (adapter
->tx_timeout_factor
* HZ
)) &&
837 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
839 tx_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, i
);
840 /* detected Tx unit hang */
841 igbvf_print_tx_hang(adapter
);
843 netif_stop_queue(netdev
);
846 adapter
->net_stats
.tx_bytes
+= total_bytes
;
847 adapter
->net_stats
.tx_packets
+= total_packets
;
848 return (count
< tx_ring
->count
);
851 static irqreturn_t
igbvf_msix_other(int irq
, void *data
)
853 struct net_device
*netdev
= data
;
854 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
855 struct e1000_hw
*hw
= &adapter
->hw
;
857 adapter
->int_counter1
++;
859 netif_carrier_off(netdev
);
860 hw
->mac
.get_link_status
= 1;
861 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
862 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
864 ew32(EIMS
, adapter
->eims_other
);
869 static irqreturn_t
igbvf_intr_msix_tx(int irq
, void *data
)
871 struct net_device
*netdev
= data
;
872 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
873 struct e1000_hw
*hw
= &adapter
->hw
;
874 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
877 adapter
->total_tx_bytes
= 0;
878 adapter
->total_tx_packets
= 0;
880 /* auto mask will automatically reenable the interrupt when we write
882 if (!igbvf_clean_tx_irq(tx_ring
))
883 /* Ring was not completely cleaned, so fire another interrupt */
884 ew32(EICS
, tx_ring
->eims_value
);
886 ew32(EIMS
, tx_ring
->eims_value
);
891 static irqreturn_t
igbvf_intr_msix_rx(int irq
, void *data
)
893 struct net_device
*netdev
= data
;
894 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
896 adapter
->int_counter0
++;
898 /* Write the ITR value calculated at the end of the
899 * previous interrupt.
901 if (adapter
->rx_ring
->set_itr
) {
902 writel(adapter
->rx_ring
->itr_val
,
903 adapter
->hw
.hw_addr
+ adapter
->rx_ring
->itr_register
);
904 adapter
->rx_ring
->set_itr
= 0;
907 if (napi_schedule_prep(&adapter
->rx_ring
->napi
)) {
908 adapter
->total_rx_bytes
= 0;
909 adapter
->total_rx_packets
= 0;
910 __napi_schedule(&adapter
->rx_ring
->napi
);
916 #define IGBVF_NO_QUEUE -1
918 static void igbvf_assign_vector(struct igbvf_adapter
*adapter
, int rx_queue
,
919 int tx_queue
, int msix_vector
)
921 struct e1000_hw
*hw
= &adapter
->hw
;
924 /* 82576 uses a table-based method for assigning vectors.
925 Each queue has a single entry in the table to which we write
926 a vector number along with a "valid" bit. Sadly, the layout
927 of the table is somewhat counterintuitive. */
928 if (rx_queue
> IGBVF_NO_QUEUE
) {
929 index
= (rx_queue
>> 1);
930 ivar
= array_er32(IVAR0
, index
);
931 if (rx_queue
& 0x1) {
932 /* vector goes into third byte of register */
933 ivar
= ivar
& 0xFF00FFFF;
934 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 16;
936 /* vector goes into low byte of register */
937 ivar
= ivar
& 0xFFFFFF00;
938 ivar
|= msix_vector
| E1000_IVAR_VALID
;
940 adapter
->rx_ring
[rx_queue
].eims_value
= 1 << msix_vector
;
941 array_ew32(IVAR0
, index
, ivar
);
943 if (tx_queue
> IGBVF_NO_QUEUE
) {
944 index
= (tx_queue
>> 1);
945 ivar
= array_er32(IVAR0
, index
);
946 if (tx_queue
& 0x1) {
947 /* vector goes into high byte of register */
948 ivar
= ivar
& 0x00FFFFFF;
949 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 24;
951 /* vector goes into second byte of register */
952 ivar
= ivar
& 0xFFFF00FF;
953 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 8;
955 adapter
->tx_ring
[tx_queue
].eims_value
= 1 << msix_vector
;
956 array_ew32(IVAR0
, index
, ivar
);
961 * igbvf_configure_msix - Configure MSI-X hardware
963 * igbvf_configure_msix sets up the hardware to properly
964 * generate MSI-X interrupts.
966 static void igbvf_configure_msix(struct igbvf_adapter
*adapter
)
969 struct e1000_hw
*hw
= &adapter
->hw
;
970 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
971 struct igbvf_ring
*rx_ring
= adapter
->rx_ring
;
974 adapter
->eims_enable_mask
= 0;
976 igbvf_assign_vector(adapter
, IGBVF_NO_QUEUE
, 0, vector
++);
977 adapter
->eims_enable_mask
|= tx_ring
->eims_value
;
978 if (tx_ring
->itr_val
)
979 writel(tx_ring
->itr_val
,
980 hw
->hw_addr
+ tx_ring
->itr_register
);
982 writel(1952, hw
->hw_addr
+ tx_ring
->itr_register
);
984 igbvf_assign_vector(adapter
, 0, IGBVF_NO_QUEUE
, vector
++);
985 adapter
->eims_enable_mask
|= rx_ring
->eims_value
;
986 if (rx_ring
->itr_val
)
987 writel(rx_ring
->itr_val
,
988 hw
->hw_addr
+ rx_ring
->itr_register
);
990 writel(1952, hw
->hw_addr
+ rx_ring
->itr_register
);
992 /* set vector for other causes, i.e. link changes */
994 tmp
= (vector
++ | E1000_IVAR_VALID
);
996 ew32(IVAR_MISC
, tmp
);
998 adapter
->eims_enable_mask
= (1 << (vector
)) - 1;
999 adapter
->eims_other
= 1 << (vector
- 1);
1003 static void igbvf_reset_interrupt_capability(struct igbvf_adapter
*adapter
)
1005 if (adapter
->msix_entries
) {
1006 pci_disable_msix(adapter
->pdev
);
1007 kfree(adapter
->msix_entries
);
1008 adapter
->msix_entries
= NULL
;
1013 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1015 * Attempt to configure interrupts using the best available
1016 * capabilities of the hardware and kernel.
1018 static void igbvf_set_interrupt_capability(struct igbvf_adapter
*adapter
)
1023 /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
1024 adapter
->msix_entries
= kcalloc(3, sizeof(struct msix_entry
),
1026 if (adapter
->msix_entries
) {
1027 for (i
= 0; i
< 3; i
++)
1028 adapter
->msix_entries
[i
].entry
= i
;
1030 err
= pci_enable_msix(adapter
->pdev
,
1031 adapter
->msix_entries
, 3);
1036 dev_err(&adapter
->pdev
->dev
,
1037 "Failed to initialize MSI-X interrupts.\n");
1038 igbvf_reset_interrupt_capability(adapter
);
1043 * igbvf_request_msix - Initialize MSI-X interrupts
1045 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1048 static int igbvf_request_msix(struct igbvf_adapter
*adapter
)
1050 struct net_device
*netdev
= adapter
->netdev
;
1051 int err
= 0, vector
= 0;
1053 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5)) {
1054 sprintf(adapter
->tx_ring
->name
, "%s-tx-0", netdev
->name
);
1055 sprintf(adapter
->rx_ring
->name
, "%s-rx-0", netdev
->name
);
1057 memcpy(adapter
->tx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1058 memcpy(adapter
->rx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1061 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1062 igbvf_intr_msix_tx
, 0, adapter
->tx_ring
->name
,
1067 adapter
->tx_ring
->itr_register
= E1000_EITR(vector
);
1068 adapter
->tx_ring
->itr_val
= 1952;
1071 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1072 igbvf_intr_msix_rx
, 0, adapter
->rx_ring
->name
,
1077 adapter
->rx_ring
->itr_register
= E1000_EITR(vector
);
1078 adapter
->rx_ring
->itr_val
= 1952;
1081 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1082 igbvf_msix_other
, 0, netdev
->name
, netdev
);
1086 igbvf_configure_msix(adapter
);
1093 * igbvf_alloc_queues - Allocate memory for all rings
1094 * @adapter: board private structure to initialize
1096 static int __devinit
igbvf_alloc_queues(struct igbvf_adapter
*adapter
)
1098 struct net_device
*netdev
= adapter
->netdev
;
1100 adapter
->tx_ring
= kzalloc(sizeof(struct igbvf_ring
), GFP_KERNEL
);
1101 if (!adapter
->tx_ring
)
1104 adapter
->rx_ring
= kzalloc(sizeof(struct igbvf_ring
), GFP_KERNEL
);
1105 if (!adapter
->rx_ring
) {
1106 kfree(adapter
->tx_ring
);
1110 netif_napi_add(netdev
, &adapter
->rx_ring
->napi
, igbvf_poll
, 64);
1116 * igbvf_request_irq - initialize interrupts
1118 * Attempts to configure interrupts using the best available
1119 * capabilities of the hardware and kernel.
1121 static int igbvf_request_irq(struct igbvf_adapter
*adapter
)
1125 /* igbvf supports msi-x only */
1126 if (adapter
->msix_entries
)
1127 err
= igbvf_request_msix(adapter
);
1132 dev_err(&adapter
->pdev
->dev
,
1133 "Unable to allocate interrupt, Error: %d\n", err
);
1138 static void igbvf_free_irq(struct igbvf_adapter
*adapter
)
1140 struct net_device
*netdev
= adapter
->netdev
;
1143 if (adapter
->msix_entries
) {
1144 for (vector
= 0; vector
< 3; vector
++)
1145 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1150 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1152 static void igbvf_irq_disable(struct igbvf_adapter
*adapter
)
1154 struct e1000_hw
*hw
= &adapter
->hw
;
1158 if (adapter
->msix_entries
)
1163 * igbvf_irq_enable - Enable default interrupt generation settings
1165 static void igbvf_irq_enable(struct igbvf_adapter
*adapter
)
1167 struct e1000_hw
*hw
= &adapter
->hw
;
1169 ew32(EIAC
, adapter
->eims_enable_mask
);
1170 ew32(EIAM
, adapter
->eims_enable_mask
);
1171 ew32(EIMS
, adapter
->eims_enable_mask
);
1175 * igbvf_poll - NAPI Rx polling callback
1176 * @napi: struct associated with this polling callback
1177 * @budget: amount of packets driver is allowed to process this poll
1179 static int igbvf_poll(struct napi_struct
*napi
, int budget
)
1181 struct igbvf_ring
*rx_ring
= container_of(napi
, struct igbvf_ring
, napi
);
1182 struct igbvf_adapter
*adapter
= rx_ring
->adapter
;
1183 struct e1000_hw
*hw
= &adapter
->hw
;
1186 igbvf_clean_rx_irq(adapter
, &work_done
, budget
);
1188 /* If not enough Rx work done, exit the polling mode */
1189 if (work_done
< budget
) {
1190 napi_complete(napi
);
1192 if (adapter
->itr_setting
& 3)
1193 igbvf_set_itr(adapter
);
1195 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
1196 ew32(EIMS
, adapter
->rx_ring
->eims_value
);
1203 * igbvf_set_rlpml - set receive large packet maximum length
1204 * @adapter: board private structure
1206 * Configure the maximum size of packets that will be received
1208 static void igbvf_set_rlpml(struct igbvf_adapter
*adapter
)
1210 int max_frame_size
= adapter
->max_frame_size
;
1211 struct e1000_hw
*hw
= &adapter
->hw
;
1214 max_frame_size
+= VLAN_TAG_SIZE
;
1216 e1000_rlpml_set_vf(hw
, max_frame_size
);
1219 static void igbvf_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
1221 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1222 struct e1000_hw
*hw
= &adapter
->hw
;
1224 if (hw
->mac
.ops
.set_vfta(hw
, vid
, true))
1225 dev_err(&adapter
->pdev
->dev
, "Failed to add vlan id %d\n", vid
);
1228 static void igbvf_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
1230 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1231 struct e1000_hw
*hw
= &adapter
->hw
;
1233 igbvf_irq_disable(adapter
);
1234 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
1236 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
1237 igbvf_irq_enable(adapter
);
1239 if (hw
->mac
.ops
.set_vfta(hw
, vid
, false))
1240 dev_err(&adapter
->pdev
->dev
,
1241 "Failed to remove vlan id %d\n", vid
);
1244 static void igbvf_vlan_rx_register(struct net_device
*netdev
,
1245 struct vlan_group
*grp
)
1247 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1249 adapter
->vlgrp
= grp
;
1252 static void igbvf_restore_vlan(struct igbvf_adapter
*adapter
)
1256 if (!adapter
->vlgrp
)
1259 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
1260 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
1262 igbvf_vlan_rx_add_vid(adapter
->netdev
, vid
);
1265 igbvf_set_rlpml(adapter
);
1269 * igbvf_configure_tx - Configure Transmit Unit after Reset
1270 * @adapter: board private structure
1272 * Configure the Tx unit of the MAC after a reset.
1274 static void igbvf_configure_tx(struct igbvf_adapter
*adapter
)
1276 struct e1000_hw
*hw
= &adapter
->hw
;
1277 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
1279 u32 txdctl
, dca_txctrl
;
1281 /* disable transmits */
1282 txdctl
= er32(TXDCTL(0));
1283 ew32(TXDCTL(0), txdctl
& ~E1000_TXDCTL_QUEUE_ENABLE
);
1286 /* Setup the HW Tx Head and Tail descriptor pointers */
1287 ew32(TDLEN(0), tx_ring
->count
* sizeof(union e1000_adv_tx_desc
));
1288 tdba
= tx_ring
->dma
;
1289 ew32(TDBAL(0), (tdba
& DMA_BIT_MASK(32)));
1290 ew32(TDBAH(0), (tdba
>> 32));
1293 tx_ring
->head
= E1000_TDH(0);
1294 tx_ring
->tail
= E1000_TDT(0);
1296 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1297 * MUST be delivered in order or it will completely screw up
1300 dca_txctrl
= er32(DCA_TXCTRL(0));
1301 dca_txctrl
&= ~E1000_DCA_TXCTRL_TX_WB_RO_EN
;
1302 ew32(DCA_TXCTRL(0), dca_txctrl
);
1304 /* enable transmits */
1305 txdctl
|= E1000_TXDCTL_QUEUE_ENABLE
;
1306 ew32(TXDCTL(0), txdctl
);
1308 /* Setup Transmit Descriptor Settings for eop descriptor */
1309 adapter
->txd_cmd
= E1000_ADVTXD_DCMD_EOP
| E1000_ADVTXD_DCMD_IFCS
;
1311 /* enable Report Status bit */
1312 adapter
->txd_cmd
|= E1000_ADVTXD_DCMD_RS
;
1316 * igbvf_setup_srrctl - configure the receive control registers
1317 * @adapter: Board private structure
1319 static void igbvf_setup_srrctl(struct igbvf_adapter
*adapter
)
1321 struct e1000_hw
*hw
= &adapter
->hw
;
1324 srrctl
&= ~(E1000_SRRCTL_DESCTYPE_MASK
|
1325 E1000_SRRCTL_BSIZEHDR_MASK
|
1326 E1000_SRRCTL_BSIZEPKT_MASK
);
1328 /* Enable queue drop to avoid head of line blocking */
1329 srrctl
|= E1000_SRRCTL_DROP_EN
;
1331 /* Setup buffer sizes */
1332 srrctl
|= ALIGN(adapter
->rx_buffer_len
, 1024) >>
1333 E1000_SRRCTL_BSIZEPKT_SHIFT
;
1335 if (adapter
->rx_buffer_len
< 2048) {
1336 adapter
->rx_ps_hdr_size
= 0;
1337 srrctl
|= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF
;
1339 adapter
->rx_ps_hdr_size
= 128;
1340 srrctl
|= adapter
->rx_ps_hdr_size
<<
1341 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT
;
1342 srrctl
|= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS
;
1345 ew32(SRRCTL(0), srrctl
);
1349 * igbvf_configure_rx - Configure Receive Unit after Reset
1350 * @adapter: board private structure
1352 * Configure the Rx unit of the MAC after a reset.
1354 static void igbvf_configure_rx(struct igbvf_adapter
*adapter
)
1356 struct e1000_hw
*hw
= &adapter
->hw
;
1357 struct igbvf_ring
*rx_ring
= adapter
->rx_ring
;
1361 /* disable receives */
1362 rxdctl
= er32(RXDCTL(0));
1363 ew32(RXDCTL(0), rxdctl
& ~E1000_RXDCTL_QUEUE_ENABLE
);
1366 rdlen
= rx_ring
->count
* sizeof(union e1000_adv_rx_desc
);
1369 * Setup the HW Rx Head and Tail Descriptor Pointers and
1370 * the Base and Length of the Rx Descriptor Ring
1372 rdba
= rx_ring
->dma
;
1373 ew32(RDBAL(0), (rdba
& DMA_BIT_MASK(32)));
1374 ew32(RDBAH(0), (rdba
>> 32));
1375 ew32(RDLEN(0), rx_ring
->count
* sizeof(union e1000_adv_rx_desc
));
1376 rx_ring
->head
= E1000_RDH(0);
1377 rx_ring
->tail
= E1000_RDT(0);
1381 rxdctl
|= E1000_RXDCTL_QUEUE_ENABLE
;
1382 rxdctl
&= 0xFFF00000;
1383 rxdctl
|= IGBVF_RX_PTHRESH
;
1384 rxdctl
|= IGBVF_RX_HTHRESH
<< 8;
1385 rxdctl
|= IGBVF_RX_WTHRESH
<< 16;
1387 igbvf_set_rlpml(adapter
);
1389 /* enable receives */
1390 ew32(RXDCTL(0), rxdctl
);
1394 * igbvf_set_multi - Multicast and Promiscuous mode set
1395 * @netdev: network interface device structure
1397 * The set_multi entry point is called whenever the multicast address
1398 * list or the network interface flags are updated. This routine is
1399 * responsible for configuring the hardware for proper multicast,
1400 * promiscuous mode, and all-multi behavior.
1402 static void igbvf_set_multi(struct net_device
*netdev
)
1404 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1405 struct e1000_hw
*hw
= &adapter
->hw
;
1406 struct netdev_hw_addr
*ha
;
1407 u8
*mta_list
= NULL
;
1410 if (!netdev_mc_empty(netdev
)) {
1411 mta_list
= kmalloc(netdev_mc_count(netdev
) * 6, GFP_ATOMIC
);
1413 dev_err(&adapter
->pdev
->dev
,
1414 "failed to allocate multicast filter list\n");
1419 /* prepare a packed array of only addresses. */
1421 netdev_for_each_mc_addr(ha
, netdev
)
1422 memcpy(mta_list
+ (i
++ * ETH_ALEN
), ha
->addr
, ETH_ALEN
);
1424 hw
->mac
.ops
.update_mc_addr_list(hw
, mta_list
, i
, 0, 0);
1429 * igbvf_configure - configure the hardware for Rx and Tx
1430 * @adapter: private board structure
1432 static void igbvf_configure(struct igbvf_adapter
*adapter
)
1434 igbvf_set_multi(adapter
->netdev
);
1436 igbvf_restore_vlan(adapter
);
1438 igbvf_configure_tx(adapter
);
1439 igbvf_setup_srrctl(adapter
);
1440 igbvf_configure_rx(adapter
);
1441 igbvf_alloc_rx_buffers(adapter
->rx_ring
,
1442 igbvf_desc_unused(adapter
->rx_ring
));
1445 /* igbvf_reset - bring the hardware into a known good state
1447 * This function boots the hardware and enables some settings that
1448 * require a configuration cycle of the hardware - those cannot be
1449 * set/changed during runtime. After reset the device needs to be
1450 * properly configured for Rx, Tx etc.
1452 static void igbvf_reset(struct igbvf_adapter
*adapter
)
1454 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
1455 struct net_device
*netdev
= adapter
->netdev
;
1456 struct e1000_hw
*hw
= &adapter
->hw
;
1458 /* Allow time for pending master requests to run */
1459 if (mac
->ops
.reset_hw(hw
))
1460 dev_err(&adapter
->pdev
->dev
, "PF still resetting\n");
1462 mac
->ops
.init_hw(hw
);
1464 if (is_valid_ether_addr(adapter
->hw
.mac
.addr
)) {
1465 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
,
1467 memcpy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
,
1471 adapter
->last_reset
= jiffies
;
1474 int igbvf_up(struct igbvf_adapter
*adapter
)
1476 struct e1000_hw
*hw
= &adapter
->hw
;
1478 /* hardware has been reset, we need to reload some things */
1479 igbvf_configure(adapter
);
1481 clear_bit(__IGBVF_DOWN
, &adapter
->state
);
1483 napi_enable(&adapter
->rx_ring
->napi
);
1484 if (adapter
->msix_entries
)
1485 igbvf_configure_msix(adapter
);
1487 /* Clear any pending interrupts. */
1489 igbvf_irq_enable(adapter
);
1491 /* start the watchdog */
1492 hw
->mac
.get_link_status
= 1;
1493 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1499 void igbvf_down(struct igbvf_adapter
*adapter
)
1501 struct net_device
*netdev
= adapter
->netdev
;
1502 struct e1000_hw
*hw
= &adapter
->hw
;
1506 * signal that we're down so the interrupt handler does not
1507 * reschedule our watchdog timer
1509 set_bit(__IGBVF_DOWN
, &adapter
->state
);
1511 /* disable receives in the hardware */
1512 rxdctl
= er32(RXDCTL(0));
1513 ew32(RXDCTL(0), rxdctl
& ~E1000_RXDCTL_QUEUE_ENABLE
);
1515 netif_stop_queue(netdev
);
1517 /* disable transmits in the hardware */
1518 txdctl
= er32(TXDCTL(0));
1519 ew32(TXDCTL(0), txdctl
& ~E1000_TXDCTL_QUEUE_ENABLE
);
1521 /* flush both disables and wait for them to finish */
1525 napi_disable(&adapter
->rx_ring
->napi
);
1527 igbvf_irq_disable(adapter
);
1529 del_timer_sync(&adapter
->watchdog_timer
);
1531 netif_carrier_off(netdev
);
1533 /* record the stats before reset*/
1534 igbvf_update_stats(adapter
);
1536 adapter
->link_speed
= 0;
1537 adapter
->link_duplex
= 0;
1539 igbvf_reset(adapter
);
1540 igbvf_clean_tx_ring(adapter
->tx_ring
);
1541 igbvf_clean_rx_ring(adapter
->rx_ring
);
1544 void igbvf_reinit_locked(struct igbvf_adapter
*adapter
)
1547 while (test_and_set_bit(__IGBVF_RESETTING
, &adapter
->state
))
1549 igbvf_down(adapter
);
1551 clear_bit(__IGBVF_RESETTING
, &adapter
->state
);
1555 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1556 * @adapter: board private structure to initialize
1558 * igbvf_sw_init initializes the Adapter private data structure.
1559 * Fields are initialized based on PCI device information and
1560 * OS network device settings (MTU size).
1562 static int __devinit
igbvf_sw_init(struct igbvf_adapter
*adapter
)
1564 struct net_device
*netdev
= adapter
->netdev
;
1567 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
;
1568 adapter
->rx_ps_hdr_size
= 0;
1569 adapter
->max_frame_size
= netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
1570 adapter
->min_frame_size
= ETH_ZLEN
+ ETH_FCS_LEN
;
1572 adapter
->tx_int_delay
= 8;
1573 adapter
->tx_abs_int_delay
= 32;
1574 adapter
->rx_int_delay
= 0;
1575 adapter
->rx_abs_int_delay
= 8;
1576 adapter
->itr_setting
= 3;
1577 adapter
->itr
= 20000;
1579 /* Set various function pointers */
1580 adapter
->ei
->init_ops(&adapter
->hw
);
1582 rc
= adapter
->hw
.mac
.ops
.init_params(&adapter
->hw
);
1586 rc
= adapter
->hw
.mbx
.ops
.init_params(&adapter
->hw
);
1590 igbvf_set_interrupt_capability(adapter
);
1592 if (igbvf_alloc_queues(adapter
))
1595 spin_lock_init(&adapter
->tx_queue_lock
);
1597 /* Explicitly disable IRQ since the NIC can be in any state. */
1598 igbvf_irq_disable(adapter
);
1600 spin_lock_init(&adapter
->stats_lock
);
1602 set_bit(__IGBVF_DOWN
, &adapter
->state
);
1606 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter
*adapter
)
1608 struct e1000_hw
*hw
= &adapter
->hw
;
1610 adapter
->stats
.last_gprc
= er32(VFGPRC
);
1611 adapter
->stats
.last_gorc
= er32(VFGORC
);
1612 adapter
->stats
.last_gptc
= er32(VFGPTC
);
1613 adapter
->stats
.last_gotc
= er32(VFGOTC
);
1614 adapter
->stats
.last_mprc
= er32(VFMPRC
);
1615 adapter
->stats
.last_gotlbc
= er32(VFGOTLBC
);
1616 adapter
->stats
.last_gptlbc
= er32(VFGPTLBC
);
1617 adapter
->stats
.last_gorlbc
= er32(VFGORLBC
);
1618 adapter
->stats
.last_gprlbc
= er32(VFGPRLBC
);
1620 adapter
->stats
.base_gprc
= er32(VFGPRC
);
1621 adapter
->stats
.base_gorc
= er32(VFGORC
);
1622 adapter
->stats
.base_gptc
= er32(VFGPTC
);
1623 adapter
->stats
.base_gotc
= er32(VFGOTC
);
1624 adapter
->stats
.base_mprc
= er32(VFMPRC
);
1625 adapter
->stats
.base_gotlbc
= er32(VFGOTLBC
);
1626 adapter
->stats
.base_gptlbc
= er32(VFGPTLBC
);
1627 adapter
->stats
.base_gorlbc
= er32(VFGORLBC
);
1628 adapter
->stats
.base_gprlbc
= er32(VFGPRLBC
);
1632 * igbvf_open - Called when a network interface is made active
1633 * @netdev: network interface device structure
1635 * Returns 0 on success, negative value on failure
1637 * The open entry point is called when a network interface is made
1638 * active by the system (IFF_UP). At this point all resources needed
1639 * for transmit and receive operations are allocated, the interrupt
1640 * handler is registered with the OS, the watchdog timer is started,
1641 * and the stack is notified that the interface is ready.
1643 static int igbvf_open(struct net_device
*netdev
)
1645 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1646 struct e1000_hw
*hw
= &adapter
->hw
;
1649 /* disallow open during test */
1650 if (test_bit(__IGBVF_TESTING
, &adapter
->state
))
1653 /* allocate transmit descriptors */
1654 err
= igbvf_setup_tx_resources(adapter
, adapter
->tx_ring
);
1658 /* allocate receive descriptors */
1659 err
= igbvf_setup_rx_resources(adapter
, adapter
->rx_ring
);
1664 * before we allocate an interrupt, we must be ready to handle it.
1665 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1666 * as soon as we call pci_request_irq, so we have to setup our
1667 * clean_rx handler before we do so.
1669 igbvf_configure(adapter
);
1671 err
= igbvf_request_irq(adapter
);
1675 /* From here on the code is the same as igbvf_up() */
1676 clear_bit(__IGBVF_DOWN
, &adapter
->state
);
1678 napi_enable(&adapter
->rx_ring
->napi
);
1680 /* clear any pending interrupts */
1683 igbvf_irq_enable(adapter
);
1685 /* start the watchdog */
1686 hw
->mac
.get_link_status
= 1;
1687 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1692 igbvf_free_rx_resources(adapter
->rx_ring
);
1694 igbvf_free_tx_resources(adapter
->tx_ring
);
1696 igbvf_reset(adapter
);
1702 * igbvf_close - Disables a network interface
1703 * @netdev: network interface device structure
1705 * Returns 0, this is not allowed to fail
1707 * The close entry point is called when an interface is de-activated
1708 * by the OS. The hardware is still under the drivers control, but
1709 * needs to be disabled. A global MAC reset is issued to stop the
1710 * hardware, and all transmit and receive resources are freed.
1712 static int igbvf_close(struct net_device
*netdev
)
1714 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1716 WARN_ON(test_bit(__IGBVF_RESETTING
, &adapter
->state
));
1717 igbvf_down(adapter
);
1719 igbvf_free_irq(adapter
);
1721 igbvf_free_tx_resources(adapter
->tx_ring
);
1722 igbvf_free_rx_resources(adapter
->rx_ring
);
1727 * igbvf_set_mac - Change the Ethernet Address of the NIC
1728 * @netdev: network interface device structure
1729 * @p: pointer to an address structure
1731 * Returns 0 on success, negative on failure
1733 static int igbvf_set_mac(struct net_device
*netdev
, void *p
)
1735 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1736 struct e1000_hw
*hw
= &adapter
->hw
;
1737 struct sockaddr
*addr
= p
;
1739 if (!is_valid_ether_addr(addr
->sa_data
))
1740 return -EADDRNOTAVAIL
;
1742 memcpy(hw
->mac
.addr
, addr
->sa_data
, netdev
->addr_len
);
1744 hw
->mac
.ops
.rar_set(hw
, hw
->mac
.addr
, 0);
1746 if (memcmp(addr
->sa_data
, hw
->mac
.addr
, 6))
1747 return -EADDRNOTAVAIL
;
1749 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1754 #define UPDATE_VF_COUNTER(reg, name) \
1756 u32 current_counter = er32(reg); \
1757 if (current_counter < adapter->stats.last_##name) \
1758 adapter->stats.name += 0x100000000LL; \
1759 adapter->stats.last_##name = current_counter; \
1760 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1761 adapter->stats.name |= current_counter; \
1765 * igbvf_update_stats - Update the board statistics counters
1766 * @adapter: board private structure
1768 void igbvf_update_stats(struct igbvf_adapter
*adapter
)
1770 struct e1000_hw
*hw
= &adapter
->hw
;
1771 struct pci_dev
*pdev
= adapter
->pdev
;
1774 * Prevent stats update while adapter is being reset, link is down
1775 * or if the pci connection is down.
1777 if (adapter
->link_speed
== 0)
1780 if (test_bit(__IGBVF_RESETTING
, &adapter
->state
))
1783 if (pci_channel_offline(pdev
))
1786 UPDATE_VF_COUNTER(VFGPRC
, gprc
);
1787 UPDATE_VF_COUNTER(VFGORC
, gorc
);
1788 UPDATE_VF_COUNTER(VFGPTC
, gptc
);
1789 UPDATE_VF_COUNTER(VFGOTC
, gotc
);
1790 UPDATE_VF_COUNTER(VFMPRC
, mprc
);
1791 UPDATE_VF_COUNTER(VFGOTLBC
, gotlbc
);
1792 UPDATE_VF_COUNTER(VFGPTLBC
, gptlbc
);
1793 UPDATE_VF_COUNTER(VFGORLBC
, gorlbc
);
1794 UPDATE_VF_COUNTER(VFGPRLBC
, gprlbc
);
1796 /* Fill out the OS statistics structure */
1797 adapter
->net_stats
.multicast
= adapter
->stats
.mprc
;
1800 static void igbvf_print_link_info(struct igbvf_adapter
*adapter
)
1802 dev_info(&adapter
->pdev
->dev
, "Link is Up %d Mbps %s\n",
1803 adapter
->link_speed
,
1804 ((adapter
->link_duplex
== FULL_DUPLEX
) ?
1805 "Full Duplex" : "Half Duplex"));
1808 static bool igbvf_has_link(struct igbvf_adapter
*adapter
)
1810 struct e1000_hw
*hw
= &adapter
->hw
;
1811 s32 ret_val
= E1000_SUCCESS
;
1814 /* If interface is down, stay link down */
1815 if (test_bit(__IGBVF_DOWN
, &adapter
->state
))
1818 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
1819 link_active
= !hw
->mac
.get_link_status
;
1821 /* if check for link returns error we will need to reset */
1822 if (ret_val
&& time_after(jiffies
, adapter
->last_reset
+ (10 * HZ
)))
1823 schedule_work(&adapter
->reset_task
);
1829 * igbvf_watchdog - Timer Call-back
1830 * @data: pointer to adapter cast into an unsigned long
1832 static void igbvf_watchdog(unsigned long data
)
1834 struct igbvf_adapter
*adapter
= (struct igbvf_adapter
*) data
;
1836 /* Do the rest outside of interrupt context */
1837 schedule_work(&adapter
->watchdog_task
);
1840 static void igbvf_watchdog_task(struct work_struct
*work
)
1842 struct igbvf_adapter
*adapter
= container_of(work
,
1843 struct igbvf_adapter
,
1845 struct net_device
*netdev
= adapter
->netdev
;
1846 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
1847 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
1848 struct e1000_hw
*hw
= &adapter
->hw
;
1852 link
= igbvf_has_link(adapter
);
1855 if (!netif_carrier_ok(netdev
)) {
1858 mac
->ops
.get_link_up_info(&adapter
->hw
,
1859 &adapter
->link_speed
,
1860 &adapter
->link_duplex
);
1861 igbvf_print_link_info(adapter
);
1863 /* adjust timeout factor according to speed/duplex */
1864 adapter
->tx_timeout_factor
= 1;
1865 switch (adapter
->link_speed
) {
1868 adapter
->tx_timeout_factor
= 16;
1872 /* maybe add some timeout factor ? */
1876 netif_carrier_on(netdev
);
1877 netif_wake_queue(netdev
);
1880 if (netif_carrier_ok(netdev
)) {
1881 adapter
->link_speed
= 0;
1882 adapter
->link_duplex
= 0;
1883 dev_info(&adapter
->pdev
->dev
, "Link is Down\n");
1884 netif_carrier_off(netdev
);
1885 netif_stop_queue(netdev
);
1889 if (netif_carrier_ok(netdev
)) {
1890 igbvf_update_stats(adapter
);
1892 tx_pending
= (igbvf_desc_unused(tx_ring
) + 1 <
1896 * We've lost link, so the controller stops DMA,
1897 * but we've got queued Tx work that's never going
1898 * to get done, so reset controller to flush Tx.
1899 * (Do the reset outside of interrupt context).
1901 adapter
->tx_timeout_count
++;
1902 schedule_work(&adapter
->reset_task
);
1906 /* Cause software interrupt to ensure Rx ring is cleaned */
1907 ew32(EICS
, adapter
->rx_ring
->eims_value
);
1909 /* Force detection of hung controller every watchdog period */
1910 adapter
->detect_tx_hung
= 1;
1912 /* Reset the timer */
1913 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
1914 mod_timer(&adapter
->watchdog_timer
,
1915 round_jiffies(jiffies
+ (2 * HZ
)));
1918 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1919 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1920 #define IGBVF_TX_FLAGS_TSO 0x00000004
1921 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1922 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1923 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1925 static int igbvf_tso(struct igbvf_adapter
*adapter
,
1926 struct igbvf_ring
*tx_ring
,
1927 struct sk_buff
*skb
, u32 tx_flags
, u8
*hdr_len
)
1929 struct e1000_adv_tx_context_desc
*context_desc
;
1932 struct igbvf_buffer
*buffer_info
;
1933 u32 info
= 0, tu_cmd
= 0;
1934 u32 mss_l4len_idx
, l4len
;
1937 if (skb_header_cloned(skb
)) {
1938 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1940 dev_err(&adapter
->pdev
->dev
,
1941 "igbvf_tso returning an error\n");
1946 l4len
= tcp_hdrlen(skb
);
1949 if (skb
->protocol
== htons(ETH_P_IP
)) {
1950 struct iphdr
*iph
= ip_hdr(skb
);
1953 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
1957 } else if (skb_is_gso_v6(skb
)) {
1958 ipv6_hdr(skb
)->payload_len
= 0;
1959 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
1960 &ipv6_hdr(skb
)->daddr
,
1964 i
= tx_ring
->next_to_use
;
1966 buffer_info
= &tx_ring
->buffer_info
[i
];
1967 context_desc
= IGBVF_TX_CTXTDESC_ADV(*tx_ring
, i
);
1968 /* VLAN MACLEN IPLEN */
1969 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
1970 info
|= (tx_flags
& IGBVF_TX_FLAGS_VLAN_MASK
);
1971 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
1972 *hdr_len
+= skb_network_offset(skb
);
1973 info
|= (skb_transport_header(skb
) - skb_network_header(skb
));
1974 *hdr_len
+= (skb_transport_header(skb
) - skb_network_header(skb
));
1975 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
1977 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1978 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
1980 if (skb
->protocol
== htons(ETH_P_IP
))
1981 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
1982 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
1984 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
1987 mss_l4len_idx
= (skb_shinfo(skb
)->gso_size
<< E1000_ADVTXD_MSS_SHIFT
);
1988 mss_l4len_idx
|= (l4len
<< E1000_ADVTXD_L4LEN_SHIFT
);
1990 context_desc
->mss_l4len_idx
= cpu_to_le32(mss_l4len_idx
);
1991 context_desc
->seqnum_seed
= 0;
1993 buffer_info
->time_stamp
= jiffies
;
1994 buffer_info
->next_to_watch
= i
;
1995 buffer_info
->dma
= 0;
1997 if (i
== tx_ring
->count
)
2000 tx_ring
->next_to_use
= i
;
2005 static inline bool igbvf_tx_csum(struct igbvf_adapter
*adapter
,
2006 struct igbvf_ring
*tx_ring
,
2007 struct sk_buff
*skb
, u32 tx_flags
)
2009 struct e1000_adv_tx_context_desc
*context_desc
;
2011 struct igbvf_buffer
*buffer_info
;
2012 u32 info
= 0, tu_cmd
= 0;
2014 if ((skb
->ip_summed
== CHECKSUM_PARTIAL
) ||
2015 (tx_flags
& IGBVF_TX_FLAGS_VLAN
)) {
2016 i
= tx_ring
->next_to_use
;
2017 buffer_info
= &tx_ring
->buffer_info
[i
];
2018 context_desc
= IGBVF_TX_CTXTDESC_ADV(*tx_ring
, i
);
2020 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
2021 info
|= (tx_flags
& IGBVF_TX_FLAGS_VLAN_MASK
);
2023 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
2024 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
2025 info
|= (skb_transport_header(skb
) -
2026 skb_network_header(skb
));
2029 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
2031 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
2033 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
2034 switch (skb
->protocol
) {
2035 case __constant_htons(ETH_P_IP
):
2036 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
2037 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2038 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2040 case __constant_htons(ETH_P_IPV6
):
2041 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2042 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2049 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
2050 context_desc
->seqnum_seed
= 0;
2051 context_desc
->mss_l4len_idx
= 0;
2053 buffer_info
->time_stamp
= jiffies
;
2054 buffer_info
->next_to_watch
= i
;
2055 buffer_info
->dma
= 0;
2057 if (i
== tx_ring
->count
)
2059 tx_ring
->next_to_use
= i
;
2067 static int igbvf_maybe_stop_tx(struct net_device
*netdev
, int size
)
2069 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2071 /* there is enough descriptors then we don't need to worry */
2072 if (igbvf_desc_unused(adapter
->tx_ring
) >= size
)
2075 netif_stop_queue(netdev
);
2079 /* We need to check again just in case room has been made available */
2080 if (igbvf_desc_unused(adapter
->tx_ring
) < size
)
2083 netif_wake_queue(netdev
);
2085 ++adapter
->restart_queue
;
2089 #define IGBVF_MAX_TXD_PWR 16
2090 #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR)
2092 static inline int igbvf_tx_map_adv(struct igbvf_adapter
*adapter
,
2093 struct igbvf_ring
*tx_ring
,
2094 struct sk_buff
*skb
,
2097 struct igbvf_buffer
*buffer_info
;
2098 struct pci_dev
*pdev
= adapter
->pdev
;
2099 unsigned int len
= skb_headlen(skb
);
2100 unsigned int count
= 0, i
;
2103 i
= tx_ring
->next_to_use
;
2105 buffer_info
= &tx_ring
->buffer_info
[i
];
2106 BUG_ON(len
>= IGBVF_MAX_DATA_PER_TXD
);
2107 buffer_info
->length
= len
;
2108 /* set time_stamp *before* dma to help avoid a possible race */
2109 buffer_info
->time_stamp
= jiffies
;
2110 buffer_info
->next_to_watch
= i
;
2111 buffer_info
->mapped_as_page
= false;
2112 buffer_info
->dma
= dma_map_single(&pdev
->dev
, skb
->data
, len
,
2114 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2118 for (f
= 0; f
< skb_shinfo(skb
)->nr_frags
; f
++) {
2119 struct skb_frag_struct
*frag
;
2123 if (i
== tx_ring
->count
)
2126 frag
= &skb_shinfo(skb
)->frags
[f
];
2129 buffer_info
= &tx_ring
->buffer_info
[i
];
2130 BUG_ON(len
>= IGBVF_MAX_DATA_PER_TXD
);
2131 buffer_info
->length
= len
;
2132 buffer_info
->time_stamp
= jiffies
;
2133 buffer_info
->next_to_watch
= i
;
2134 buffer_info
->mapped_as_page
= true;
2135 buffer_info
->dma
= dma_map_page(&pdev
->dev
,
2140 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2144 tx_ring
->buffer_info
[i
].skb
= skb
;
2145 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2150 dev_err(&pdev
->dev
, "TX DMA map failed\n");
2152 /* clear timestamp and dma mappings for failed buffer_info mapping */
2153 buffer_info
->dma
= 0;
2154 buffer_info
->time_stamp
= 0;
2155 buffer_info
->length
= 0;
2156 buffer_info
->next_to_watch
= 0;
2157 buffer_info
->mapped_as_page
= false;
2161 /* clear timestamp and dma mappings for remaining portion of packet */
2164 i
+= tx_ring
->count
;
2166 buffer_info
= &tx_ring
->buffer_info
[i
];
2167 igbvf_put_txbuf(adapter
, buffer_info
);
2173 static inline void igbvf_tx_queue_adv(struct igbvf_adapter
*adapter
,
2174 struct igbvf_ring
*tx_ring
,
2175 int tx_flags
, int count
, u32 paylen
,
2178 union e1000_adv_tx_desc
*tx_desc
= NULL
;
2179 struct igbvf_buffer
*buffer_info
;
2180 u32 olinfo_status
= 0, cmd_type_len
;
2183 cmd_type_len
= (E1000_ADVTXD_DTYP_DATA
| E1000_ADVTXD_DCMD_IFCS
|
2184 E1000_ADVTXD_DCMD_DEXT
);
2186 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
2187 cmd_type_len
|= E1000_ADVTXD_DCMD_VLE
;
2189 if (tx_flags
& IGBVF_TX_FLAGS_TSO
) {
2190 cmd_type_len
|= E1000_ADVTXD_DCMD_TSE
;
2192 /* insert tcp checksum */
2193 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2195 /* insert ip checksum */
2196 if (tx_flags
& IGBVF_TX_FLAGS_IPV4
)
2197 olinfo_status
|= E1000_TXD_POPTS_IXSM
<< 8;
2199 } else if (tx_flags
& IGBVF_TX_FLAGS_CSUM
) {
2200 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2203 olinfo_status
|= ((paylen
- hdr_len
) << E1000_ADVTXD_PAYLEN_SHIFT
);
2205 i
= tx_ring
->next_to_use
;
2207 buffer_info
= &tx_ring
->buffer_info
[i
];
2208 tx_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, i
);
2209 tx_desc
->read
.buffer_addr
= cpu_to_le64(buffer_info
->dma
);
2210 tx_desc
->read
.cmd_type_len
=
2211 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
2212 tx_desc
->read
.olinfo_status
= cpu_to_le32(olinfo_status
);
2214 if (i
== tx_ring
->count
)
2218 tx_desc
->read
.cmd_type_len
|= cpu_to_le32(adapter
->txd_cmd
);
2219 /* Force memory writes to complete before letting h/w
2220 * know there are new descriptors to fetch. (Only
2221 * applicable for weak-ordered memory model archs,
2222 * such as IA-64). */
2225 tx_ring
->next_to_use
= i
;
2226 writel(i
, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
2227 /* we need this if more than one processor can write to our tail
2228 * at a time, it syncronizes IO on IA64/Altix systems */
2232 static netdev_tx_t
igbvf_xmit_frame_ring_adv(struct sk_buff
*skb
,
2233 struct net_device
*netdev
,
2234 struct igbvf_ring
*tx_ring
)
2236 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2237 unsigned int first
, tx_flags
= 0;
2242 if (test_bit(__IGBVF_DOWN
, &adapter
->state
)) {
2243 dev_kfree_skb_any(skb
);
2244 return NETDEV_TX_OK
;
2247 if (skb
->len
<= 0) {
2248 dev_kfree_skb_any(skb
);
2249 return NETDEV_TX_OK
;
2253 * need: count + 4 desc gap to keep tail from touching
2254 * + 2 desc gap to keep tail from touching head,
2255 * + 1 desc for skb->data,
2256 * + 1 desc for context descriptor,
2257 * head, otherwise try next time
2259 if (igbvf_maybe_stop_tx(netdev
, skb_shinfo(skb
)->nr_frags
+ 4)) {
2260 /* this is a hard error */
2261 return NETDEV_TX_BUSY
;
2264 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
2265 tx_flags
|= IGBVF_TX_FLAGS_VLAN
;
2266 tx_flags
|= (vlan_tx_tag_get(skb
) << IGBVF_TX_FLAGS_VLAN_SHIFT
);
2269 if (skb
->protocol
== htons(ETH_P_IP
))
2270 tx_flags
|= IGBVF_TX_FLAGS_IPV4
;
2272 first
= tx_ring
->next_to_use
;
2274 tso
= skb_is_gso(skb
) ?
2275 igbvf_tso(adapter
, tx_ring
, skb
, tx_flags
, &hdr_len
) : 0;
2276 if (unlikely(tso
< 0)) {
2277 dev_kfree_skb_any(skb
);
2278 return NETDEV_TX_OK
;
2282 tx_flags
|= IGBVF_TX_FLAGS_TSO
;
2283 else if (igbvf_tx_csum(adapter
, tx_ring
, skb
, tx_flags
) &&
2284 (skb
->ip_summed
== CHECKSUM_PARTIAL
))
2285 tx_flags
|= IGBVF_TX_FLAGS_CSUM
;
2288 * count reflects descriptors mapped, if 0 then mapping error
2289 * has occured and we need to rewind the descriptor queue
2291 count
= igbvf_tx_map_adv(adapter
, tx_ring
, skb
, first
);
2294 igbvf_tx_queue_adv(adapter
, tx_ring
, tx_flags
, count
,
2296 /* Make sure there is space in the ring for the next send. */
2297 igbvf_maybe_stop_tx(netdev
, MAX_SKB_FRAGS
+ 4);
2299 dev_kfree_skb_any(skb
);
2300 tx_ring
->buffer_info
[first
].time_stamp
= 0;
2301 tx_ring
->next_to_use
= first
;
2304 return NETDEV_TX_OK
;
2307 static netdev_tx_t
igbvf_xmit_frame(struct sk_buff
*skb
,
2308 struct net_device
*netdev
)
2310 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2311 struct igbvf_ring
*tx_ring
;
2313 if (test_bit(__IGBVF_DOWN
, &adapter
->state
)) {
2314 dev_kfree_skb_any(skb
);
2315 return NETDEV_TX_OK
;
2318 tx_ring
= &adapter
->tx_ring
[0];
2320 return igbvf_xmit_frame_ring_adv(skb
, netdev
, tx_ring
);
2324 * igbvf_tx_timeout - Respond to a Tx Hang
2325 * @netdev: network interface device structure
2327 static void igbvf_tx_timeout(struct net_device
*netdev
)
2329 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2331 /* Do the reset outside of interrupt context */
2332 adapter
->tx_timeout_count
++;
2333 schedule_work(&adapter
->reset_task
);
2336 static void igbvf_reset_task(struct work_struct
*work
)
2338 struct igbvf_adapter
*adapter
;
2339 adapter
= container_of(work
, struct igbvf_adapter
, reset_task
);
2341 igbvf_reinit_locked(adapter
);
2345 * igbvf_get_stats - Get System Network Statistics
2346 * @netdev: network interface device structure
2348 * Returns the address of the device statistics structure.
2349 * The statistics are actually updated from the timer callback.
2351 static struct net_device_stats
*igbvf_get_stats(struct net_device
*netdev
)
2353 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2355 /* only return the current stats */
2356 return &adapter
->net_stats
;
2360 * igbvf_change_mtu - Change the Maximum Transfer Unit
2361 * @netdev: network interface device structure
2362 * @new_mtu: new value for maximum frame size
2364 * Returns 0 on success, negative on failure
2366 static int igbvf_change_mtu(struct net_device
*netdev
, int new_mtu
)
2368 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2369 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
2371 if ((new_mtu
< 68) || (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
2372 dev_err(&adapter
->pdev
->dev
, "Invalid MTU setting\n");
2376 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2377 if (max_frame
> MAX_STD_JUMBO_FRAME_SIZE
) {
2378 dev_err(&adapter
->pdev
->dev
, "MTU > 9216 not supported.\n");
2382 while (test_and_set_bit(__IGBVF_RESETTING
, &adapter
->state
))
2384 /* igbvf_down has a dependency on max_frame_size */
2385 adapter
->max_frame_size
= max_frame
;
2386 if (netif_running(netdev
))
2387 igbvf_down(adapter
);
2390 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2391 * means we reserve 2 more, this pushes us to allocate from the next
2393 * i.e. RXBUFFER_2048 --> size-4096 slab
2394 * However with the new *_jumbo_rx* routines, jumbo receives will use
2398 if (max_frame
<= 1024)
2399 adapter
->rx_buffer_len
= 1024;
2400 else if (max_frame
<= 2048)
2401 adapter
->rx_buffer_len
= 2048;
2403 #if (PAGE_SIZE / 2) > 16384
2404 adapter
->rx_buffer_len
= 16384;
2406 adapter
->rx_buffer_len
= PAGE_SIZE
/ 2;
2410 /* adjust allocation if LPE protects us, and we aren't using SBP */
2411 if ((max_frame
== ETH_FRAME_LEN
+ ETH_FCS_LEN
) ||
2412 (max_frame
== ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
))
2413 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+
2416 dev_info(&adapter
->pdev
->dev
, "changing MTU from %d to %d\n",
2417 netdev
->mtu
, new_mtu
);
2418 netdev
->mtu
= new_mtu
;
2420 if (netif_running(netdev
))
2423 igbvf_reset(adapter
);
2425 clear_bit(__IGBVF_RESETTING
, &adapter
->state
);
2430 static int igbvf_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
2438 static int igbvf_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2440 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2441 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2446 netif_device_detach(netdev
);
2448 if (netif_running(netdev
)) {
2449 WARN_ON(test_bit(__IGBVF_RESETTING
, &adapter
->state
));
2450 igbvf_down(adapter
);
2451 igbvf_free_irq(adapter
);
2455 retval
= pci_save_state(pdev
);
2460 pci_disable_device(pdev
);
2466 static int igbvf_resume(struct pci_dev
*pdev
)
2468 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2469 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2472 pci_restore_state(pdev
);
2473 err
= pci_enable_device_mem(pdev
);
2475 dev_err(&pdev
->dev
, "Cannot enable PCI device from suspend\n");
2479 pci_set_master(pdev
);
2481 if (netif_running(netdev
)) {
2482 err
= igbvf_request_irq(adapter
);
2487 igbvf_reset(adapter
);
2489 if (netif_running(netdev
))
2492 netif_device_attach(netdev
);
2498 static void igbvf_shutdown(struct pci_dev
*pdev
)
2500 igbvf_suspend(pdev
, PMSG_SUSPEND
);
2503 #ifdef CONFIG_NET_POLL_CONTROLLER
2505 * Polling 'interrupt' - used by things like netconsole to send skbs
2506 * without having to re-enable interrupts. It's not called while
2507 * the interrupt routine is executing.
2509 static void igbvf_netpoll(struct net_device
*netdev
)
2511 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2513 disable_irq(adapter
->pdev
->irq
);
2515 igbvf_clean_tx_irq(adapter
->tx_ring
);
2517 enable_irq(adapter
->pdev
->irq
);
2522 * igbvf_io_error_detected - called when PCI error is detected
2523 * @pdev: Pointer to PCI device
2524 * @state: The current pci connection state
2526 * This function is called after a PCI bus error affecting
2527 * this device has been detected.
2529 static pci_ers_result_t
igbvf_io_error_detected(struct pci_dev
*pdev
,
2530 pci_channel_state_t state
)
2532 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2533 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2535 netif_device_detach(netdev
);
2537 if (state
== pci_channel_io_perm_failure
)
2538 return PCI_ERS_RESULT_DISCONNECT
;
2540 if (netif_running(netdev
))
2541 igbvf_down(adapter
);
2542 pci_disable_device(pdev
);
2544 /* Request a slot slot reset. */
2545 return PCI_ERS_RESULT_NEED_RESET
;
2549 * igbvf_io_slot_reset - called after the pci bus has been reset.
2550 * @pdev: Pointer to PCI device
2552 * Restart the card from scratch, as if from a cold-boot. Implementation
2553 * resembles the first-half of the igbvf_resume routine.
2555 static pci_ers_result_t
igbvf_io_slot_reset(struct pci_dev
*pdev
)
2557 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2558 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2560 if (pci_enable_device_mem(pdev
)) {
2562 "Cannot re-enable PCI device after reset.\n");
2563 return PCI_ERS_RESULT_DISCONNECT
;
2565 pci_set_master(pdev
);
2567 igbvf_reset(adapter
);
2569 return PCI_ERS_RESULT_RECOVERED
;
2573 * igbvf_io_resume - called when traffic can start flowing again.
2574 * @pdev: Pointer to PCI device
2576 * This callback is called when the error recovery driver tells us that
2577 * its OK to resume normal operation. Implementation resembles the
2578 * second-half of the igbvf_resume routine.
2580 static void igbvf_io_resume(struct pci_dev
*pdev
)
2582 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2583 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2585 if (netif_running(netdev
)) {
2586 if (igbvf_up(adapter
)) {
2588 "can't bring device back up after reset\n");
2593 netif_device_attach(netdev
);
2596 static void igbvf_print_device_info(struct igbvf_adapter
*adapter
)
2598 struct e1000_hw
*hw
= &adapter
->hw
;
2599 struct net_device
*netdev
= adapter
->netdev
;
2600 struct pci_dev
*pdev
= adapter
->pdev
;
2602 dev_info(&pdev
->dev
, "Intel(R) 82576 Virtual Function\n");
2603 dev_info(&pdev
->dev
, "Address: %pM\n", netdev
->dev_addr
);
2604 dev_info(&pdev
->dev
, "MAC: %d\n", hw
->mac
.type
);
2607 static const struct net_device_ops igbvf_netdev_ops
= {
2608 .ndo_open
= igbvf_open
,
2609 .ndo_stop
= igbvf_close
,
2610 .ndo_start_xmit
= igbvf_xmit_frame
,
2611 .ndo_get_stats
= igbvf_get_stats
,
2612 .ndo_set_multicast_list
= igbvf_set_multi
,
2613 .ndo_set_mac_address
= igbvf_set_mac
,
2614 .ndo_change_mtu
= igbvf_change_mtu
,
2615 .ndo_do_ioctl
= igbvf_ioctl
,
2616 .ndo_tx_timeout
= igbvf_tx_timeout
,
2617 .ndo_vlan_rx_register
= igbvf_vlan_rx_register
,
2618 .ndo_vlan_rx_add_vid
= igbvf_vlan_rx_add_vid
,
2619 .ndo_vlan_rx_kill_vid
= igbvf_vlan_rx_kill_vid
,
2620 #ifdef CONFIG_NET_POLL_CONTROLLER
2621 .ndo_poll_controller
= igbvf_netpoll
,
2626 * igbvf_probe - Device Initialization Routine
2627 * @pdev: PCI device information struct
2628 * @ent: entry in igbvf_pci_tbl
2630 * Returns 0 on success, negative on failure
2632 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2633 * The OS initialization, configuring of the adapter private structure,
2634 * and a hardware reset occur.
2636 static int __devinit
igbvf_probe(struct pci_dev
*pdev
,
2637 const struct pci_device_id
*ent
)
2639 struct net_device
*netdev
;
2640 struct igbvf_adapter
*adapter
;
2641 struct e1000_hw
*hw
;
2642 const struct igbvf_info
*ei
= igbvf_info_tbl
[ent
->driver_data
];
2644 static int cards_found
;
2645 int err
, pci_using_dac
;
2647 err
= pci_enable_device_mem(pdev
);
2652 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(64));
2654 err
= dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(64));
2658 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32));
2660 err
= dma_set_coherent_mask(&pdev
->dev
,
2663 dev_err(&pdev
->dev
, "No usable DMA "
2664 "configuration, aborting\n");
2670 err
= pci_request_regions(pdev
, igbvf_driver_name
);
2674 pci_set_master(pdev
);
2677 netdev
= alloc_etherdev(sizeof(struct igbvf_adapter
));
2679 goto err_alloc_etherdev
;
2681 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
2683 pci_set_drvdata(pdev
, netdev
);
2684 adapter
= netdev_priv(netdev
);
2686 adapter
->netdev
= netdev
;
2687 adapter
->pdev
= pdev
;
2689 adapter
->pba
= ei
->pba
;
2690 adapter
->flags
= ei
->flags
;
2691 adapter
->hw
.back
= adapter
;
2692 adapter
->hw
.mac
.type
= ei
->mac
;
2693 adapter
->msg_enable
= (1 << NETIF_MSG_DRV
| NETIF_MSG_PROBE
) - 1;
2695 /* PCI config space info */
2697 hw
->vendor_id
= pdev
->vendor
;
2698 hw
->device_id
= pdev
->device
;
2699 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
2700 hw
->subsystem_device_id
= pdev
->subsystem_device
;
2702 pci_read_config_byte(pdev
, PCI_REVISION_ID
, &hw
->revision_id
);
2705 adapter
->hw
.hw_addr
= ioremap(pci_resource_start(pdev
, 0),
2706 pci_resource_len(pdev
, 0));
2708 if (!adapter
->hw
.hw_addr
)
2711 if (ei
->get_variants
) {
2712 err
= ei
->get_variants(adapter
);
2717 /* setup adapter struct */
2718 err
= igbvf_sw_init(adapter
);
2722 /* construct the net_device struct */
2723 netdev
->netdev_ops
= &igbvf_netdev_ops
;
2725 igbvf_set_ethtool_ops(netdev
);
2726 netdev
->watchdog_timeo
= 5 * HZ
;
2727 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
2729 adapter
->bd_number
= cards_found
++;
2731 netdev
->features
= NETIF_F_SG
|
2733 NETIF_F_HW_VLAN_TX
|
2734 NETIF_F_HW_VLAN_RX
|
2735 NETIF_F_HW_VLAN_FILTER
;
2737 netdev
->features
|= NETIF_F_IPV6_CSUM
;
2738 netdev
->features
|= NETIF_F_TSO
;
2739 netdev
->features
|= NETIF_F_TSO6
;
2742 netdev
->features
|= NETIF_F_HIGHDMA
;
2744 netdev
->vlan_features
|= NETIF_F_TSO
;
2745 netdev
->vlan_features
|= NETIF_F_TSO6
;
2746 netdev
->vlan_features
|= NETIF_F_IP_CSUM
;
2747 netdev
->vlan_features
|= NETIF_F_IPV6_CSUM
;
2748 netdev
->vlan_features
|= NETIF_F_SG
;
2750 /*reset the controller to put the device in a known good state */
2751 err
= hw
->mac
.ops
.reset_hw(hw
);
2753 dev_info(&pdev
->dev
,
2754 "PF still in reset state, assigning new address."
2755 " Is the PF interface up?\n");
2756 dev_hw_addr_random(adapter
->netdev
, hw
->mac
.addr
);
2758 err
= hw
->mac
.ops
.read_mac_addr(hw
);
2760 dev_err(&pdev
->dev
, "Error reading MAC address\n");
2765 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
2766 memcpy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
2768 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
2769 dev_err(&pdev
->dev
, "Invalid MAC Address: %pM\n",
2775 setup_timer(&adapter
->watchdog_timer
, &igbvf_watchdog
,
2776 (unsigned long) adapter
);
2778 INIT_WORK(&adapter
->reset_task
, igbvf_reset_task
);
2779 INIT_WORK(&adapter
->watchdog_task
, igbvf_watchdog_task
);
2781 /* ring size defaults */
2782 adapter
->rx_ring
->count
= 1024;
2783 adapter
->tx_ring
->count
= 1024;
2785 /* reset the hardware with the new settings */
2786 igbvf_reset(adapter
);
2788 /* tell the stack to leave us alone until igbvf_open() is called */
2789 netif_carrier_off(netdev
);
2790 netif_stop_queue(netdev
);
2792 strcpy(netdev
->name
, "eth%d");
2793 err
= register_netdev(netdev
);
2797 igbvf_print_device_info(adapter
);
2799 igbvf_initialize_last_counter_stats(adapter
);
2804 kfree(adapter
->tx_ring
);
2805 kfree(adapter
->rx_ring
);
2807 igbvf_reset_interrupt_capability(adapter
);
2808 iounmap(adapter
->hw
.hw_addr
);
2810 free_netdev(netdev
);
2812 pci_release_regions(pdev
);
2815 pci_disable_device(pdev
);
2820 * igbvf_remove - Device Removal Routine
2821 * @pdev: PCI device information struct
2823 * igbvf_remove is called by the PCI subsystem to alert the driver
2824 * that it should release a PCI device. The could be caused by a
2825 * Hot-Plug event, or because the driver is going to be removed from
2828 static void __devexit
igbvf_remove(struct pci_dev
*pdev
)
2830 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2831 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2832 struct e1000_hw
*hw
= &adapter
->hw
;
2835 * flush_scheduled work may reschedule our watchdog task, so
2836 * explicitly disable watchdog tasks from being rescheduled
2838 set_bit(__IGBVF_DOWN
, &adapter
->state
);
2839 del_timer_sync(&adapter
->watchdog_timer
);
2841 flush_scheduled_work();
2843 unregister_netdev(netdev
);
2845 igbvf_reset_interrupt_capability(adapter
);
2848 * it is important to delete the napi struct prior to freeing the
2849 * rx ring so that you do not end up with null pointer refs
2851 netif_napi_del(&adapter
->rx_ring
->napi
);
2852 kfree(adapter
->tx_ring
);
2853 kfree(adapter
->rx_ring
);
2855 iounmap(hw
->hw_addr
);
2856 if (hw
->flash_address
)
2857 iounmap(hw
->flash_address
);
2858 pci_release_regions(pdev
);
2860 free_netdev(netdev
);
2862 pci_disable_device(pdev
);
2865 /* PCI Error Recovery (ERS) */
2866 static struct pci_error_handlers igbvf_err_handler
= {
2867 .error_detected
= igbvf_io_error_detected
,
2868 .slot_reset
= igbvf_io_slot_reset
,
2869 .resume
= igbvf_io_resume
,
2872 static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl
) = {
2873 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82576_VF
), board_vf
},
2874 { } /* terminate list */
2876 MODULE_DEVICE_TABLE(pci
, igbvf_pci_tbl
);
2878 /* PCI Device API Driver */
2879 static struct pci_driver igbvf_driver
= {
2880 .name
= igbvf_driver_name
,
2881 .id_table
= igbvf_pci_tbl
,
2882 .probe
= igbvf_probe
,
2883 .remove
= __devexit_p(igbvf_remove
),
2885 /* Power Management Hooks */
2886 .suspend
= igbvf_suspend
,
2887 .resume
= igbvf_resume
,
2889 .shutdown
= igbvf_shutdown
,
2890 .err_handler
= &igbvf_err_handler
2894 * igbvf_init_module - Driver Registration Routine
2896 * igbvf_init_module is the first routine called when the driver is
2897 * loaded. All it does is register with the PCI subsystem.
2899 static int __init
igbvf_init_module(void)
2902 printk(KERN_INFO
"%s - version %s\n",
2903 igbvf_driver_string
, igbvf_driver_version
);
2904 printk(KERN_INFO
"%s\n", igbvf_copyright
);
2906 ret
= pci_register_driver(&igbvf_driver
);
2907 pm_qos_add_request(&igbvf_driver_pm_qos_req
, PM_QOS_CPU_DMA_LATENCY
,
2908 PM_QOS_DEFAULT_VALUE
);
2912 module_init(igbvf_init_module
);
2915 * igbvf_exit_module - Driver Exit Cleanup Routine
2917 * igbvf_exit_module is called just before the driver is removed
2920 static void __exit
igbvf_exit_module(void)
2922 pci_unregister_driver(&igbvf_driver
);
2923 pm_qos_remove_request(&igbvf_driver_pm_qos_req
);
2925 module_exit(igbvf_exit_module
);
2928 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2929 MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver");
2930 MODULE_LICENSE("GPL");
2931 MODULE_VERSION(DRV_VERSION
);