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 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
)
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 dma_unmap_single(&pdev
->dev
, 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 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
282 adapter
->rx_ps_hdr_size
,
288 dma_unmap_page(&pdev
->dev
, 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 dma_unmap_page(&adapter
->pdev
->dev
,
378 dma_unmap_single(&adapter
->pdev
->dev
,
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
= dma_alloc_coherent(&pdev
->dev
, tx_ring
->size
,
443 &tx_ring
->dma
, GFP_KERNEL
);
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
= dma_alloc_coherent(&pdev
->dev
, rx_ring
->size
,
485 &rx_ring
->dma
, GFP_KERNEL
);
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 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
556 tx_ring
->desc
= NULL
;
560 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
561 * @adapter: board private structure
563 static void igbvf_clean_rx_ring(struct igbvf_ring
*rx_ring
)
565 struct igbvf_adapter
*adapter
= rx_ring
->adapter
;
566 struct igbvf_buffer
*buffer_info
;
567 struct pci_dev
*pdev
= adapter
->pdev
;
571 if (!rx_ring
->buffer_info
)
574 /* Free all the Rx ring sk_buffs */
575 for (i
= 0; i
< rx_ring
->count
; i
++) {
576 buffer_info
= &rx_ring
->buffer_info
[i
];
577 if (buffer_info
->dma
) {
578 if (adapter
->rx_ps_hdr_size
){
579 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
580 adapter
->rx_ps_hdr_size
,
583 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
584 adapter
->rx_buffer_len
,
587 buffer_info
->dma
= 0;
590 if (buffer_info
->skb
) {
591 dev_kfree_skb(buffer_info
->skb
);
592 buffer_info
->skb
= NULL
;
595 if (buffer_info
->page
) {
596 if (buffer_info
->page_dma
)
597 dma_unmap_page(&pdev
->dev
,
598 buffer_info
->page_dma
,
601 put_page(buffer_info
->page
);
602 buffer_info
->page
= NULL
;
603 buffer_info
->page_dma
= 0;
604 buffer_info
->page_offset
= 0;
608 size
= sizeof(struct igbvf_buffer
) * rx_ring
->count
;
609 memset(rx_ring
->buffer_info
, 0, size
);
611 /* Zero out the descriptor ring */
612 memset(rx_ring
->desc
, 0, rx_ring
->size
);
614 rx_ring
->next_to_clean
= 0;
615 rx_ring
->next_to_use
= 0;
617 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->head
);
618 writel(0, adapter
->hw
.hw_addr
+ rx_ring
->tail
);
622 * igbvf_free_rx_resources - Free Rx Resources
623 * @rx_ring: ring to clean the resources from
625 * Free all receive software resources
628 void igbvf_free_rx_resources(struct igbvf_ring
*rx_ring
)
630 struct pci_dev
*pdev
= rx_ring
->adapter
->pdev
;
632 igbvf_clean_rx_ring(rx_ring
);
634 vfree(rx_ring
->buffer_info
);
635 rx_ring
->buffer_info
= NULL
;
637 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
639 rx_ring
->desc
= NULL
;
643 * igbvf_update_itr - update the dynamic ITR value based on statistics
644 * @adapter: pointer to adapter
645 * @itr_setting: current adapter->itr
646 * @packets: the number of packets during this measurement interval
647 * @bytes: the number of bytes during this measurement interval
649 * Stores a new ITR value based on packets and byte
650 * counts during the last interrupt. The advantage of per interrupt
651 * computation is faster updates and more accurate ITR for the current
652 * traffic pattern. Constants in this function were computed
653 * based on theoretical maximum wire speed and thresholds were set based
654 * on testing data as well as attempting to minimize response time
655 * while increasing bulk throughput. This functionality is controlled
656 * by the InterruptThrottleRate module parameter.
658 static unsigned int igbvf_update_itr(struct igbvf_adapter
*adapter
,
659 u16 itr_setting
, int packets
,
662 unsigned int retval
= itr_setting
;
665 goto update_itr_done
;
667 switch (itr_setting
) {
669 /* handle TSO and jumbo frames */
670 if (bytes
/packets
> 8000)
671 retval
= bulk_latency
;
672 else if ((packets
< 5) && (bytes
> 512))
673 retval
= low_latency
;
675 case low_latency
: /* 50 usec aka 20000 ints/s */
677 /* this if handles the TSO accounting */
678 if (bytes
/packets
> 8000)
679 retval
= bulk_latency
;
680 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
681 retval
= bulk_latency
;
682 else if ((packets
> 35))
683 retval
= lowest_latency
;
684 } else if (bytes
/packets
> 2000) {
685 retval
= bulk_latency
;
686 } else if (packets
<= 2 && bytes
< 512) {
687 retval
= lowest_latency
;
690 case bulk_latency
: /* 250 usec aka 4000 ints/s */
693 retval
= low_latency
;
694 } else if (bytes
< 6000) {
695 retval
= low_latency
;
704 static void igbvf_set_itr(struct igbvf_adapter
*adapter
)
706 struct e1000_hw
*hw
= &adapter
->hw
;
708 u32 new_itr
= adapter
->itr
;
710 adapter
->tx_itr
= igbvf_update_itr(adapter
, adapter
->tx_itr
,
711 adapter
->total_tx_packets
,
712 adapter
->total_tx_bytes
);
713 /* conservative mode (itr 3) eliminates the lowest_latency setting */
714 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
715 adapter
->tx_itr
= low_latency
;
717 adapter
->rx_itr
= igbvf_update_itr(adapter
, adapter
->rx_itr
,
718 adapter
->total_rx_packets
,
719 adapter
->total_rx_bytes
);
720 /* conservative mode (itr 3) eliminates the lowest_latency setting */
721 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
722 adapter
->rx_itr
= low_latency
;
724 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
726 switch (current_itr
) {
727 /* counts and packets in update_itr are dependent on these numbers */
732 new_itr
= 20000; /* aka hwitr = ~200 */
741 if (new_itr
!= adapter
->itr
) {
743 * this attempts to bias the interrupt rate towards Bulk
744 * by adding intermediate steps when interrupt rate is
747 new_itr
= new_itr
> adapter
->itr
?
748 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
750 adapter
->itr
= new_itr
;
751 adapter
->rx_ring
->itr_val
= 1952;
753 if (adapter
->msix_entries
)
754 adapter
->rx_ring
->set_itr
= 1;
761 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
762 * @adapter: board private structure
763 * returns true if ring is completely cleaned
765 static bool igbvf_clean_tx_irq(struct igbvf_ring
*tx_ring
)
767 struct igbvf_adapter
*adapter
= tx_ring
->adapter
;
768 struct e1000_hw
*hw
= &adapter
->hw
;
769 struct net_device
*netdev
= adapter
->netdev
;
770 struct igbvf_buffer
*buffer_info
;
772 union e1000_adv_tx_desc
*tx_desc
, *eop_desc
;
773 unsigned int total_bytes
= 0, total_packets
= 0;
774 unsigned int i
, eop
, count
= 0;
775 bool cleaned
= false;
777 i
= tx_ring
->next_to_clean
;
778 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
779 eop_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, eop
);
781 while ((eop_desc
->wb
.status
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
782 (count
< tx_ring
->count
)) {
783 for (cleaned
= false; !cleaned
; count
++) {
784 tx_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, i
);
785 buffer_info
= &tx_ring
->buffer_info
[i
];
786 cleaned
= (i
== eop
);
787 skb
= buffer_info
->skb
;
790 unsigned int segs
, bytecount
;
792 /* gso_segs is currently only valid for tcp */
793 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
794 /* multiply data chunks by size of headers */
795 bytecount
= ((segs
- 1) * skb_headlen(skb
)) +
797 total_packets
+= segs
;
798 total_bytes
+= bytecount
;
801 igbvf_put_txbuf(adapter
, buffer_info
);
802 tx_desc
->wb
.status
= 0;
805 if (i
== tx_ring
->count
)
808 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
809 eop_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, eop
);
812 tx_ring
->next_to_clean
= i
;
814 if (unlikely(count
&&
815 netif_carrier_ok(netdev
) &&
816 igbvf_desc_unused(tx_ring
) >= IGBVF_TX_QUEUE_WAKE
)) {
817 /* Make sure that anybody stopping the queue after this
818 * sees the new next_to_clean.
821 if (netif_queue_stopped(netdev
) &&
822 !(test_bit(__IGBVF_DOWN
, &adapter
->state
))) {
823 netif_wake_queue(netdev
);
824 ++adapter
->restart_queue
;
828 if (adapter
->detect_tx_hung
) {
829 /* Detect a transmit hang in hardware, this serializes the
830 * check with the clearing of time_stamp and movement of i */
831 adapter
->detect_tx_hung
= false;
832 if (tx_ring
->buffer_info
[i
].time_stamp
&&
833 time_after(jiffies
, tx_ring
->buffer_info
[i
].time_stamp
+
834 (adapter
->tx_timeout_factor
* HZ
)) &&
835 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
837 tx_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, i
);
838 /* detected Tx unit hang */
839 igbvf_print_tx_hang(adapter
);
841 netif_stop_queue(netdev
);
844 adapter
->net_stats
.tx_bytes
+= total_bytes
;
845 adapter
->net_stats
.tx_packets
+= total_packets
;
846 return (count
< tx_ring
->count
);
849 static irqreturn_t
igbvf_msix_other(int irq
, void *data
)
851 struct net_device
*netdev
= data
;
852 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
853 struct e1000_hw
*hw
= &adapter
->hw
;
855 adapter
->int_counter1
++;
857 netif_carrier_off(netdev
);
858 hw
->mac
.get_link_status
= 1;
859 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
860 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
862 ew32(EIMS
, adapter
->eims_other
);
867 static irqreturn_t
igbvf_intr_msix_tx(int irq
, void *data
)
869 struct net_device
*netdev
= data
;
870 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
871 struct e1000_hw
*hw
= &adapter
->hw
;
872 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
875 adapter
->total_tx_bytes
= 0;
876 adapter
->total_tx_packets
= 0;
878 /* auto mask will automatically reenable the interrupt when we write
880 if (!igbvf_clean_tx_irq(tx_ring
))
881 /* Ring was not completely cleaned, so fire another interrupt */
882 ew32(EICS
, tx_ring
->eims_value
);
884 ew32(EIMS
, tx_ring
->eims_value
);
889 static irqreturn_t
igbvf_intr_msix_rx(int irq
, void *data
)
891 struct net_device
*netdev
= data
;
892 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
894 adapter
->int_counter0
++;
896 /* Write the ITR value calculated at the end of the
897 * previous interrupt.
899 if (adapter
->rx_ring
->set_itr
) {
900 writel(adapter
->rx_ring
->itr_val
,
901 adapter
->hw
.hw_addr
+ adapter
->rx_ring
->itr_register
);
902 adapter
->rx_ring
->set_itr
= 0;
905 if (napi_schedule_prep(&adapter
->rx_ring
->napi
)) {
906 adapter
->total_rx_bytes
= 0;
907 adapter
->total_rx_packets
= 0;
908 __napi_schedule(&adapter
->rx_ring
->napi
);
914 #define IGBVF_NO_QUEUE -1
916 static void igbvf_assign_vector(struct igbvf_adapter
*adapter
, int rx_queue
,
917 int tx_queue
, int msix_vector
)
919 struct e1000_hw
*hw
= &adapter
->hw
;
922 /* 82576 uses a table-based method for assigning vectors.
923 Each queue has a single entry in the table to which we write
924 a vector number along with a "valid" bit. Sadly, the layout
925 of the table is somewhat counterintuitive. */
926 if (rx_queue
> IGBVF_NO_QUEUE
) {
927 index
= (rx_queue
>> 1);
928 ivar
= array_er32(IVAR0
, index
);
929 if (rx_queue
& 0x1) {
930 /* vector goes into third byte of register */
931 ivar
= ivar
& 0xFF00FFFF;
932 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 16;
934 /* vector goes into low byte of register */
935 ivar
= ivar
& 0xFFFFFF00;
936 ivar
|= msix_vector
| E1000_IVAR_VALID
;
938 adapter
->rx_ring
[rx_queue
].eims_value
= 1 << msix_vector
;
939 array_ew32(IVAR0
, index
, ivar
);
941 if (tx_queue
> IGBVF_NO_QUEUE
) {
942 index
= (tx_queue
>> 1);
943 ivar
= array_er32(IVAR0
, index
);
944 if (tx_queue
& 0x1) {
945 /* vector goes into high byte of register */
946 ivar
= ivar
& 0x00FFFFFF;
947 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 24;
949 /* vector goes into second byte of register */
950 ivar
= ivar
& 0xFFFF00FF;
951 ivar
|= (msix_vector
| E1000_IVAR_VALID
) << 8;
953 adapter
->tx_ring
[tx_queue
].eims_value
= 1 << msix_vector
;
954 array_ew32(IVAR0
, index
, ivar
);
959 * igbvf_configure_msix - Configure MSI-X hardware
961 * igbvf_configure_msix sets up the hardware to properly
962 * generate MSI-X interrupts.
964 static void igbvf_configure_msix(struct igbvf_adapter
*adapter
)
967 struct e1000_hw
*hw
= &adapter
->hw
;
968 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
969 struct igbvf_ring
*rx_ring
= adapter
->rx_ring
;
972 adapter
->eims_enable_mask
= 0;
974 igbvf_assign_vector(adapter
, IGBVF_NO_QUEUE
, 0, vector
++);
975 adapter
->eims_enable_mask
|= tx_ring
->eims_value
;
976 if (tx_ring
->itr_val
)
977 writel(tx_ring
->itr_val
,
978 hw
->hw_addr
+ tx_ring
->itr_register
);
980 writel(1952, hw
->hw_addr
+ tx_ring
->itr_register
);
982 igbvf_assign_vector(adapter
, 0, IGBVF_NO_QUEUE
, vector
++);
983 adapter
->eims_enable_mask
|= rx_ring
->eims_value
;
984 if (rx_ring
->itr_val
)
985 writel(rx_ring
->itr_val
,
986 hw
->hw_addr
+ rx_ring
->itr_register
);
988 writel(1952, hw
->hw_addr
+ rx_ring
->itr_register
);
990 /* set vector for other causes, i.e. link changes */
992 tmp
= (vector
++ | E1000_IVAR_VALID
);
994 ew32(IVAR_MISC
, tmp
);
996 adapter
->eims_enable_mask
= (1 << (vector
)) - 1;
997 adapter
->eims_other
= 1 << (vector
- 1);
1001 static void igbvf_reset_interrupt_capability(struct igbvf_adapter
*adapter
)
1003 if (adapter
->msix_entries
) {
1004 pci_disable_msix(adapter
->pdev
);
1005 kfree(adapter
->msix_entries
);
1006 adapter
->msix_entries
= NULL
;
1011 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1013 * Attempt to configure interrupts using the best available
1014 * capabilities of the hardware and kernel.
1016 static void igbvf_set_interrupt_capability(struct igbvf_adapter
*adapter
)
1021 /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
1022 adapter
->msix_entries
= kcalloc(3, sizeof(struct msix_entry
),
1024 if (adapter
->msix_entries
) {
1025 for (i
= 0; i
< 3; i
++)
1026 adapter
->msix_entries
[i
].entry
= i
;
1028 err
= pci_enable_msix(adapter
->pdev
,
1029 adapter
->msix_entries
, 3);
1034 dev_err(&adapter
->pdev
->dev
,
1035 "Failed to initialize MSI-X interrupts.\n");
1036 igbvf_reset_interrupt_capability(adapter
);
1041 * igbvf_request_msix - Initialize MSI-X interrupts
1043 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1046 static int igbvf_request_msix(struct igbvf_adapter
*adapter
)
1048 struct net_device
*netdev
= adapter
->netdev
;
1049 int err
= 0, vector
= 0;
1051 if (strlen(netdev
->name
) < (IFNAMSIZ
- 5)) {
1052 sprintf(adapter
->tx_ring
->name
, "%s-tx-0", netdev
->name
);
1053 sprintf(adapter
->rx_ring
->name
, "%s-rx-0", netdev
->name
);
1055 memcpy(adapter
->tx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1056 memcpy(adapter
->rx_ring
->name
, netdev
->name
, IFNAMSIZ
);
1059 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1060 igbvf_intr_msix_tx
, 0, adapter
->tx_ring
->name
,
1065 adapter
->tx_ring
->itr_register
= E1000_EITR(vector
);
1066 adapter
->tx_ring
->itr_val
= 1952;
1069 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1070 igbvf_intr_msix_rx
, 0, adapter
->rx_ring
->name
,
1075 adapter
->rx_ring
->itr_register
= E1000_EITR(vector
);
1076 adapter
->rx_ring
->itr_val
= 1952;
1079 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1080 igbvf_msix_other
, 0, netdev
->name
, netdev
);
1084 igbvf_configure_msix(adapter
);
1091 * igbvf_alloc_queues - Allocate memory for all rings
1092 * @adapter: board private structure to initialize
1094 static int __devinit
igbvf_alloc_queues(struct igbvf_adapter
*adapter
)
1096 struct net_device
*netdev
= adapter
->netdev
;
1098 adapter
->tx_ring
= kzalloc(sizeof(struct igbvf_ring
), GFP_KERNEL
);
1099 if (!adapter
->tx_ring
)
1102 adapter
->rx_ring
= kzalloc(sizeof(struct igbvf_ring
), GFP_KERNEL
);
1103 if (!adapter
->rx_ring
) {
1104 kfree(adapter
->tx_ring
);
1108 netif_napi_add(netdev
, &adapter
->rx_ring
->napi
, igbvf_poll
, 64);
1114 * igbvf_request_irq - initialize interrupts
1116 * Attempts to configure interrupts using the best available
1117 * capabilities of the hardware and kernel.
1119 static int igbvf_request_irq(struct igbvf_adapter
*adapter
)
1123 /* igbvf supports msi-x only */
1124 if (adapter
->msix_entries
)
1125 err
= igbvf_request_msix(adapter
);
1130 dev_err(&adapter
->pdev
->dev
,
1131 "Unable to allocate interrupt, Error: %d\n", err
);
1136 static void igbvf_free_irq(struct igbvf_adapter
*adapter
)
1138 struct net_device
*netdev
= adapter
->netdev
;
1141 if (adapter
->msix_entries
) {
1142 for (vector
= 0; vector
< 3; vector
++)
1143 free_irq(adapter
->msix_entries
[vector
].vector
, netdev
);
1148 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1150 static void igbvf_irq_disable(struct igbvf_adapter
*adapter
)
1152 struct e1000_hw
*hw
= &adapter
->hw
;
1156 if (adapter
->msix_entries
)
1161 * igbvf_irq_enable - Enable default interrupt generation settings
1163 static void igbvf_irq_enable(struct igbvf_adapter
*adapter
)
1165 struct e1000_hw
*hw
= &adapter
->hw
;
1167 ew32(EIAC
, adapter
->eims_enable_mask
);
1168 ew32(EIAM
, adapter
->eims_enable_mask
);
1169 ew32(EIMS
, adapter
->eims_enable_mask
);
1173 * igbvf_poll - NAPI Rx polling callback
1174 * @napi: struct associated with this polling callback
1175 * @budget: amount of packets driver is allowed to process this poll
1177 static int igbvf_poll(struct napi_struct
*napi
, int budget
)
1179 struct igbvf_ring
*rx_ring
= container_of(napi
, struct igbvf_ring
, napi
);
1180 struct igbvf_adapter
*adapter
= rx_ring
->adapter
;
1181 struct e1000_hw
*hw
= &adapter
->hw
;
1184 igbvf_clean_rx_irq(adapter
, &work_done
, budget
);
1186 /* If not enough Rx work done, exit the polling mode */
1187 if (work_done
< budget
) {
1188 napi_complete(napi
);
1190 if (adapter
->itr_setting
& 3)
1191 igbvf_set_itr(adapter
);
1193 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
1194 ew32(EIMS
, adapter
->rx_ring
->eims_value
);
1201 * igbvf_set_rlpml - set receive large packet maximum length
1202 * @adapter: board private structure
1204 * Configure the maximum size of packets that will be received
1206 static void igbvf_set_rlpml(struct igbvf_adapter
*adapter
)
1208 int max_frame_size
= adapter
->max_frame_size
;
1209 struct e1000_hw
*hw
= &adapter
->hw
;
1212 max_frame_size
+= VLAN_TAG_SIZE
;
1214 e1000_rlpml_set_vf(hw
, max_frame_size
);
1217 static void igbvf_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
1219 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1220 struct e1000_hw
*hw
= &adapter
->hw
;
1222 if (hw
->mac
.ops
.set_vfta(hw
, vid
, true))
1223 dev_err(&adapter
->pdev
->dev
, "Failed to add vlan id %d\n", vid
);
1226 static void igbvf_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
1228 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1229 struct e1000_hw
*hw
= &adapter
->hw
;
1231 igbvf_irq_disable(adapter
);
1232 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
1234 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
1235 igbvf_irq_enable(adapter
);
1237 if (hw
->mac
.ops
.set_vfta(hw
, vid
, false))
1238 dev_err(&adapter
->pdev
->dev
,
1239 "Failed to remove vlan id %d\n", vid
);
1242 static void igbvf_vlan_rx_register(struct net_device
*netdev
,
1243 struct vlan_group
*grp
)
1245 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1247 adapter
->vlgrp
= grp
;
1250 static void igbvf_restore_vlan(struct igbvf_adapter
*adapter
)
1254 if (!adapter
->vlgrp
)
1257 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
1258 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
1260 igbvf_vlan_rx_add_vid(adapter
->netdev
, vid
);
1263 igbvf_set_rlpml(adapter
);
1267 * igbvf_configure_tx - Configure Transmit Unit after Reset
1268 * @adapter: board private structure
1270 * Configure the Tx unit of the MAC after a reset.
1272 static void igbvf_configure_tx(struct igbvf_adapter
*adapter
)
1274 struct e1000_hw
*hw
= &adapter
->hw
;
1275 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
1277 u32 txdctl
, dca_txctrl
;
1279 /* disable transmits */
1280 txdctl
= er32(TXDCTL(0));
1281 ew32(TXDCTL(0), txdctl
& ~E1000_TXDCTL_QUEUE_ENABLE
);
1284 /* Setup the HW Tx Head and Tail descriptor pointers */
1285 ew32(TDLEN(0), tx_ring
->count
* sizeof(union e1000_adv_tx_desc
));
1286 tdba
= tx_ring
->dma
;
1287 ew32(TDBAL(0), (tdba
& DMA_BIT_MASK(32)));
1288 ew32(TDBAH(0), (tdba
>> 32));
1291 tx_ring
->head
= E1000_TDH(0);
1292 tx_ring
->tail
= E1000_TDT(0);
1294 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1295 * MUST be delivered in order or it will completely screw up
1298 dca_txctrl
= er32(DCA_TXCTRL(0));
1299 dca_txctrl
&= ~E1000_DCA_TXCTRL_TX_WB_RO_EN
;
1300 ew32(DCA_TXCTRL(0), dca_txctrl
);
1302 /* enable transmits */
1303 txdctl
|= E1000_TXDCTL_QUEUE_ENABLE
;
1304 ew32(TXDCTL(0), txdctl
);
1306 /* Setup Transmit Descriptor Settings for eop descriptor */
1307 adapter
->txd_cmd
= E1000_ADVTXD_DCMD_EOP
| E1000_ADVTXD_DCMD_IFCS
;
1309 /* enable Report Status bit */
1310 adapter
->txd_cmd
|= E1000_ADVTXD_DCMD_RS
;
1314 * igbvf_setup_srrctl - configure the receive control registers
1315 * @adapter: Board private structure
1317 static void igbvf_setup_srrctl(struct igbvf_adapter
*adapter
)
1319 struct e1000_hw
*hw
= &adapter
->hw
;
1322 srrctl
&= ~(E1000_SRRCTL_DESCTYPE_MASK
|
1323 E1000_SRRCTL_BSIZEHDR_MASK
|
1324 E1000_SRRCTL_BSIZEPKT_MASK
);
1326 /* Enable queue drop to avoid head of line blocking */
1327 srrctl
|= E1000_SRRCTL_DROP_EN
;
1329 /* Setup buffer sizes */
1330 srrctl
|= ALIGN(adapter
->rx_buffer_len
, 1024) >>
1331 E1000_SRRCTL_BSIZEPKT_SHIFT
;
1333 if (adapter
->rx_buffer_len
< 2048) {
1334 adapter
->rx_ps_hdr_size
= 0;
1335 srrctl
|= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF
;
1337 adapter
->rx_ps_hdr_size
= 128;
1338 srrctl
|= adapter
->rx_ps_hdr_size
<<
1339 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT
;
1340 srrctl
|= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS
;
1343 ew32(SRRCTL(0), srrctl
);
1347 * igbvf_configure_rx - Configure Receive Unit after Reset
1348 * @adapter: board private structure
1350 * Configure the Rx unit of the MAC after a reset.
1352 static void igbvf_configure_rx(struct igbvf_adapter
*adapter
)
1354 struct e1000_hw
*hw
= &adapter
->hw
;
1355 struct igbvf_ring
*rx_ring
= adapter
->rx_ring
;
1359 /* disable receives */
1360 rxdctl
= er32(RXDCTL(0));
1361 ew32(RXDCTL(0), rxdctl
& ~E1000_RXDCTL_QUEUE_ENABLE
);
1364 rdlen
= rx_ring
->count
* sizeof(union e1000_adv_rx_desc
);
1367 * Setup the HW Rx Head and Tail Descriptor Pointers and
1368 * the Base and Length of the Rx Descriptor Ring
1370 rdba
= rx_ring
->dma
;
1371 ew32(RDBAL(0), (rdba
& DMA_BIT_MASK(32)));
1372 ew32(RDBAH(0), (rdba
>> 32));
1373 ew32(RDLEN(0), rx_ring
->count
* sizeof(union e1000_adv_rx_desc
));
1374 rx_ring
->head
= E1000_RDH(0);
1375 rx_ring
->tail
= E1000_RDT(0);
1379 rxdctl
|= E1000_RXDCTL_QUEUE_ENABLE
;
1380 rxdctl
&= 0xFFF00000;
1381 rxdctl
|= IGBVF_RX_PTHRESH
;
1382 rxdctl
|= IGBVF_RX_HTHRESH
<< 8;
1383 rxdctl
|= IGBVF_RX_WTHRESH
<< 16;
1385 igbvf_set_rlpml(adapter
);
1387 /* enable receives */
1388 ew32(RXDCTL(0), rxdctl
);
1392 * igbvf_set_multi - Multicast and Promiscuous mode set
1393 * @netdev: network interface device structure
1395 * The set_multi entry point is called whenever the multicast address
1396 * list or the network interface flags are updated. This routine is
1397 * responsible for configuring the hardware for proper multicast,
1398 * promiscuous mode, and all-multi behavior.
1400 static void igbvf_set_multi(struct net_device
*netdev
)
1402 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1403 struct e1000_hw
*hw
= &adapter
->hw
;
1404 struct netdev_hw_addr
*ha
;
1405 u8
*mta_list
= NULL
;
1408 if (!netdev_mc_empty(netdev
)) {
1409 mta_list
= kmalloc(netdev_mc_count(netdev
) * 6, GFP_ATOMIC
);
1411 dev_err(&adapter
->pdev
->dev
,
1412 "failed to allocate multicast filter list\n");
1417 /* prepare a packed array of only addresses. */
1419 netdev_for_each_mc_addr(ha
, netdev
)
1420 memcpy(mta_list
+ (i
++ * ETH_ALEN
), ha
->addr
, ETH_ALEN
);
1422 hw
->mac
.ops
.update_mc_addr_list(hw
, mta_list
, i
, 0, 0);
1427 * igbvf_configure - configure the hardware for Rx and Tx
1428 * @adapter: private board structure
1430 static void igbvf_configure(struct igbvf_adapter
*adapter
)
1432 igbvf_set_multi(adapter
->netdev
);
1434 igbvf_restore_vlan(adapter
);
1436 igbvf_configure_tx(adapter
);
1437 igbvf_setup_srrctl(adapter
);
1438 igbvf_configure_rx(adapter
);
1439 igbvf_alloc_rx_buffers(adapter
->rx_ring
,
1440 igbvf_desc_unused(adapter
->rx_ring
));
1443 /* igbvf_reset - bring the hardware into a known good state
1445 * This function boots the hardware and enables some settings that
1446 * require a configuration cycle of the hardware - those cannot be
1447 * set/changed during runtime. After reset the device needs to be
1448 * properly configured for Rx, Tx etc.
1450 static void igbvf_reset(struct igbvf_adapter
*adapter
)
1452 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
1453 struct net_device
*netdev
= adapter
->netdev
;
1454 struct e1000_hw
*hw
= &adapter
->hw
;
1456 /* Allow time for pending master requests to run */
1457 if (mac
->ops
.reset_hw(hw
))
1458 dev_err(&adapter
->pdev
->dev
, "PF still resetting\n");
1460 mac
->ops
.init_hw(hw
);
1462 if (is_valid_ether_addr(adapter
->hw
.mac
.addr
)) {
1463 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
,
1465 memcpy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
,
1469 adapter
->last_reset
= jiffies
;
1472 int igbvf_up(struct igbvf_adapter
*adapter
)
1474 struct e1000_hw
*hw
= &adapter
->hw
;
1476 /* hardware has been reset, we need to reload some things */
1477 igbvf_configure(adapter
);
1479 clear_bit(__IGBVF_DOWN
, &adapter
->state
);
1481 napi_enable(&adapter
->rx_ring
->napi
);
1482 if (adapter
->msix_entries
)
1483 igbvf_configure_msix(adapter
);
1485 /* Clear any pending interrupts. */
1487 igbvf_irq_enable(adapter
);
1489 /* start the watchdog */
1490 hw
->mac
.get_link_status
= 1;
1491 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1497 void igbvf_down(struct igbvf_adapter
*adapter
)
1499 struct net_device
*netdev
= adapter
->netdev
;
1500 struct e1000_hw
*hw
= &adapter
->hw
;
1504 * signal that we're down so the interrupt handler does not
1505 * reschedule our watchdog timer
1507 set_bit(__IGBVF_DOWN
, &adapter
->state
);
1509 /* disable receives in the hardware */
1510 rxdctl
= er32(RXDCTL(0));
1511 ew32(RXDCTL(0), rxdctl
& ~E1000_RXDCTL_QUEUE_ENABLE
);
1513 netif_stop_queue(netdev
);
1515 /* disable transmits in the hardware */
1516 txdctl
= er32(TXDCTL(0));
1517 ew32(TXDCTL(0), txdctl
& ~E1000_TXDCTL_QUEUE_ENABLE
);
1519 /* flush both disables and wait for them to finish */
1523 napi_disable(&adapter
->rx_ring
->napi
);
1525 igbvf_irq_disable(adapter
);
1527 del_timer_sync(&adapter
->watchdog_timer
);
1529 netif_carrier_off(netdev
);
1531 /* record the stats before reset*/
1532 igbvf_update_stats(adapter
);
1534 adapter
->link_speed
= 0;
1535 adapter
->link_duplex
= 0;
1537 igbvf_reset(adapter
);
1538 igbvf_clean_tx_ring(adapter
->tx_ring
);
1539 igbvf_clean_rx_ring(adapter
->rx_ring
);
1542 void igbvf_reinit_locked(struct igbvf_adapter
*adapter
)
1545 while (test_and_set_bit(__IGBVF_RESETTING
, &adapter
->state
))
1547 igbvf_down(adapter
);
1549 clear_bit(__IGBVF_RESETTING
, &adapter
->state
);
1553 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1554 * @adapter: board private structure to initialize
1556 * igbvf_sw_init initializes the Adapter private data structure.
1557 * Fields are initialized based on PCI device information and
1558 * OS network device settings (MTU size).
1560 static int __devinit
igbvf_sw_init(struct igbvf_adapter
*adapter
)
1562 struct net_device
*netdev
= adapter
->netdev
;
1565 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
;
1566 adapter
->rx_ps_hdr_size
= 0;
1567 adapter
->max_frame_size
= netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
1568 adapter
->min_frame_size
= ETH_ZLEN
+ ETH_FCS_LEN
;
1570 adapter
->tx_int_delay
= 8;
1571 adapter
->tx_abs_int_delay
= 32;
1572 adapter
->rx_int_delay
= 0;
1573 adapter
->rx_abs_int_delay
= 8;
1574 adapter
->itr_setting
= 3;
1575 adapter
->itr
= 20000;
1577 /* Set various function pointers */
1578 adapter
->ei
->init_ops(&adapter
->hw
);
1580 rc
= adapter
->hw
.mac
.ops
.init_params(&adapter
->hw
);
1584 rc
= adapter
->hw
.mbx
.ops
.init_params(&adapter
->hw
);
1588 igbvf_set_interrupt_capability(adapter
);
1590 if (igbvf_alloc_queues(adapter
))
1593 spin_lock_init(&adapter
->tx_queue_lock
);
1595 /* Explicitly disable IRQ since the NIC can be in any state. */
1596 igbvf_irq_disable(adapter
);
1598 spin_lock_init(&adapter
->stats_lock
);
1600 set_bit(__IGBVF_DOWN
, &adapter
->state
);
1604 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter
*adapter
)
1606 struct e1000_hw
*hw
= &adapter
->hw
;
1608 adapter
->stats
.last_gprc
= er32(VFGPRC
);
1609 adapter
->stats
.last_gorc
= er32(VFGORC
);
1610 adapter
->stats
.last_gptc
= er32(VFGPTC
);
1611 adapter
->stats
.last_gotc
= er32(VFGOTC
);
1612 adapter
->stats
.last_mprc
= er32(VFMPRC
);
1613 adapter
->stats
.last_gotlbc
= er32(VFGOTLBC
);
1614 adapter
->stats
.last_gptlbc
= er32(VFGPTLBC
);
1615 adapter
->stats
.last_gorlbc
= er32(VFGORLBC
);
1616 adapter
->stats
.last_gprlbc
= er32(VFGPRLBC
);
1618 adapter
->stats
.base_gprc
= er32(VFGPRC
);
1619 adapter
->stats
.base_gorc
= er32(VFGORC
);
1620 adapter
->stats
.base_gptc
= er32(VFGPTC
);
1621 adapter
->stats
.base_gotc
= er32(VFGOTC
);
1622 adapter
->stats
.base_mprc
= er32(VFMPRC
);
1623 adapter
->stats
.base_gotlbc
= er32(VFGOTLBC
);
1624 adapter
->stats
.base_gptlbc
= er32(VFGPTLBC
);
1625 adapter
->stats
.base_gorlbc
= er32(VFGORLBC
);
1626 adapter
->stats
.base_gprlbc
= er32(VFGPRLBC
);
1630 * igbvf_open - Called when a network interface is made active
1631 * @netdev: network interface device structure
1633 * Returns 0 on success, negative value on failure
1635 * The open entry point is called when a network interface is made
1636 * active by the system (IFF_UP). At this point all resources needed
1637 * for transmit and receive operations are allocated, the interrupt
1638 * handler is registered with the OS, the watchdog timer is started,
1639 * and the stack is notified that the interface is ready.
1641 static int igbvf_open(struct net_device
*netdev
)
1643 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1644 struct e1000_hw
*hw
= &adapter
->hw
;
1647 /* disallow open during test */
1648 if (test_bit(__IGBVF_TESTING
, &adapter
->state
))
1651 /* allocate transmit descriptors */
1652 err
= igbvf_setup_tx_resources(adapter
, adapter
->tx_ring
);
1656 /* allocate receive descriptors */
1657 err
= igbvf_setup_rx_resources(adapter
, adapter
->rx_ring
);
1662 * before we allocate an interrupt, we must be ready to handle it.
1663 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1664 * as soon as we call pci_request_irq, so we have to setup our
1665 * clean_rx handler before we do so.
1667 igbvf_configure(adapter
);
1669 err
= igbvf_request_irq(adapter
);
1673 /* From here on the code is the same as igbvf_up() */
1674 clear_bit(__IGBVF_DOWN
, &adapter
->state
);
1676 napi_enable(&adapter
->rx_ring
->napi
);
1678 /* clear any pending interrupts */
1681 igbvf_irq_enable(adapter
);
1683 /* start the watchdog */
1684 hw
->mac
.get_link_status
= 1;
1685 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
1690 igbvf_free_rx_resources(adapter
->rx_ring
);
1692 igbvf_free_tx_resources(adapter
->tx_ring
);
1694 igbvf_reset(adapter
);
1700 * igbvf_close - Disables a network interface
1701 * @netdev: network interface device structure
1703 * Returns 0, this is not allowed to fail
1705 * The close entry point is called when an interface is de-activated
1706 * by the OS. The hardware is still under the drivers control, but
1707 * needs to be disabled. A global MAC reset is issued to stop the
1708 * hardware, and all transmit and receive resources are freed.
1710 static int igbvf_close(struct net_device
*netdev
)
1712 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1714 WARN_ON(test_bit(__IGBVF_RESETTING
, &adapter
->state
));
1715 igbvf_down(adapter
);
1717 igbvf_free_irq(adapter
);
1719 igbvf_free_tx_resources(adapter
->tx_ring
);
1720 igbvf_free_rx_resources(adapter
->rx_ring
);
1725 * igbvf_set_mac - Change the Ethernet Address of the NIC
1726 * @netdev: network interface device structure
1727 * @p: pointer to an address structure
1729 * Returns 0 on success, negative on failure
1731 static int igbvf_set_mac(struct net_device
*netdev
, void *p
)
1733 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
1734 struct e1000_hw
*hw
= &adapter
->hw
;
1735 struct sockaddr
*addr
= p
;
1737 if (!is_valid_ether_addr(addr
->sa_data
))
1738 return -EADDRNOTAVAIL
;
1740 memcpy(hw
->mac
.addr
, addr
->sa_data
, netdev
->addr_len
);
1742 hw
->mac
.ops
.rar_set(hw
, hw
->mac
.addr
, 0);
1744 if (memcmp(addr
->sa_data
, hw
->mac
.addr
, 6))
1745 return -EADDRNOTAVAIL
;
1747 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1752 #define UPDATE_VF_COUNTER(reg, name) \
1754 u32 current_counter = er32(reg); \
1755 if (current_counter < adapter->stats.last_##name) \
1756 adapter->stats.name += 0x100000000LL; \
1757 adapter->stats.last_##name = current_counter; \
1758 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1759 adapter->stats.name |= current_counter; \
1763 * igbvf_update_stats - Update the board statistics counters
1764 * @adapter: board private structure
1766 void igbvf_update_stats(struct igbvf_adapter
*adapter
)
1768 struct e1000_hw
*hw
= &adapter
->hw
;
1769 struct pci_dev
*pdev
= adapter
->pdev
;
1772 * Prevent stats update while adapter is being reset, link is down
1773 * or if the pci connection is down.
1775 if (adapter
->link_speed
== 0)
1778 if (test_bit(__IGBVF_RESETTING
, &adapter
->state
))
1781 if (pci_channel_offline(pdev
))
1784 UPDATE_VF_COUNTER(VFGPRC
, gprc
);
1785 UPDATE_VF_COUNTER(VFGORC
, gorc
);
1786 UPDATE_VF_COUNTER(VFGPTC
, gptc
);
1787 UPDATE_VF_COUNTER(VFGOTC
, gotc
);
1788 UPDATE_VF_COUNTER(VFMPRC
, mprc
);
1789 UPDATE_VF_COUNTER(VFGOTLBC
, gotlbc
);
1790 UPDATE_VF_COUNTER(VFGPTLBC
, gptlbc
);
1791 UPDATE_VF_COUNTER(VFGORLBC
, gorlbc
);
1792 UPDATE_VF_COUNTER(VFGPRLBC
, gprlbc
);
1794 /* Fill out the OS statistics structure */
1795 adapter
->net_stats
.multicast
= adapter
->stats
.mprc
;
1798 static void igbvf_print_link_info(struct igbvf_adapter
*adapter
)
1800 dev_info(&adapter
->pdev
->dev
, "Link is Up %d Mbps %s\n",
1801 adapter
->link_speed
,
1802 ((adapter
->link_duplex
== FULL_DUPLEX
) ?
1803 "Full Duplex" : "Half Duplex"));
1806 static bool igbvf_has_link(struct igbvf_adapter
*adapter
)
1808 struct e1000_hw
*hw
= &adapter
->hw
;
1809 s32 ret_val
= E1000_SUCCESS
;
1812 /* If interface is down, stay link down */
1813 if (test_bit(__IGBVF_DOWN
, &adapter
->state
))
1816 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
1817 link_active
= !hw
->mac
.get_link_status
;
1819 /* if check for link returns error we will need to reset */
1820 if (ret_val
&& time_after(jiffies
, adapter
->last_reset
+ (10 * HZ
)))
1821 schedule_work(&adapter
->reset_task
);
1827 * igbvf_watchdog - Timer Call-back
1828 * @data: pointer to adapter cast into an unsigned long
1830 static void igbvf_watchdog(unsigned long data
)
1832 struct igbvf_adapter
*adapter
= (struct igbvf_adapter
*) data
;
1834 /* Do the rest outside of interrupt context */
1835 schedule_work(&adapter
->watchdog_task
);
1838 static void igbvf_watchdog_task(struct work_struct
*work
)
1840 struct igbvf_adapter
*adapter
= container_of(work
,
1841 struct igbvf_adapter
,
1843 struct net_device
*netdev
= adapter
->netdev
;
1844 struct e1000_mac_info
*mac
= &adapter
->hw
.mac
;
1845 struct igbvf_ring
*tx_ring
= adapter
->tx_ring
;
1846 struct e1000_hw
*hw
= &adapter
->hw
;
1850 link
= igbvf_has_link(adapter
);
1853 if (!netif_carrier_ok(netdev
)) {
1856 mac
->ops
.get_link_up_info(&adapter
->hw
,
1857 &adapter
->link_speed
,
1858 &adapter
->link_duplex
);
1859 igbvf_print_link_info(adapter
);
1861 /* adjust timeout factor according to speed/duplex */
1862 adapter
->tx_timeout_factor
= 1;
1863 switch (adapter
->link_speed
) {
1866 adapter
->tx_timeout_factor
= 16;
1870 /* maybe add some timeout factor ? */
1874 netif_carrier_on(netdev
);
1875 netif_wake_queue(netdev
);
1878 if (netif_carrier_ok(netdev
)) {
1879 adapter
->link_speed
= 0;
1880 adapter
->link_duplex
= 0;
1881 dev_info(&adapter
->pdev
->dev
, "Link is Down\n");
1882 netif_carrier_off(netdev
);
1883 netif_stop_queue(netdev
);
1887 if (netif_carrier_ok(netdev
)) {
1888 igbvf_update_stats(adapter
);
1890 tx_pending
= (igbvf_desc_unused(tx_ring
) + 1 <
1894 * We've lost link, so the controller stops DMA,
1895 * but we've got queued Tx work that's never going
1896 * to get done, so reset controller to flush Tx.
1897 * (Do the reset outside of interrupt context).
1899 adapter
->tx_timeout_count
++;
1900 schedule_work(&adapter
->reset_task
);
1904 /* Cause software interrupt to ensure Rx ring is cleaned */
1905 ew32(EICS
, adapter
->rx_ring
->eims_value
);
1907 /* Force detection of hung controller every watchdog period */
1908 adapter
->detect_tx_hung
= 1;
1910 /* Reset the timer */
1911 if (!test_bit(__IGBVF_DOWN
, &adapter
->state
))
1912 mod_timer(&adapter
->watchdog_timer
,
1913 round_jiffies(jiffies
+ (2 * HZ
)));
1916 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1917 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1918 #define IGBVF_TX_FLAGS_TSO 0x00000004
1919 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1920 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1921 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1923 static int igbvf_tso(struct igbvf_adapter
*adapter
,
1924 struct igbvf_ring
*tx_ring
,
1925 struct sk_buff
*skb
, u32 tx_flags
, u8
*hdr_len
)
1927 struct e1000_adv_tx_context_desc
*context_desc
;
1930 struct igbvf_buffer
*buffer_info
;
1931 u32 info
= 0, tu_cmd
= 0;
1932 u32 mss_l4len_idx
, l4len
;
1935 if (skb_header_cloned(skb
)) {
1936 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
1938 dev_err(&adapter
->pdev
->dev
,
1939 "igbvf_tso returning an error\n");
1944 l4len
= tcp_hdrlen(skb
);
1947 if (skb
->protocol
== htons(ETH_P_IP
)) {
1948 struct iphdr
*iph
= ip_hdr(skb
);
1951 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
1955 } else if (skb_is_gso_v6(skb
)) {
1956 ipv6_hdr(skb
)->payload_len
= 0;
1957 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
1958 &ipv6_hdr(skb
)->daddr
,
1962 i
= tx_ring
->next_to_use
;
1964 buffer_info
= &tx_ring
->buffer_info
[i
];
1965 context_desc
= IGBVF_TX_CTXTDESC_ADV(*tx_ring
, i
);
1966 /* VLAN MACLEN IPLEN */
1967 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
1968 info
|= (tx_flags
& IGBVF_TX_FLAGS_VLAN_MASK
);
1969 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
1970 *hdr_len
+= skb_network_offset(skb
);
1971 info
|= (skb_transport_header(skb
) - skb_network_header(skb
));
1972 *hdr_len
+= (skb_transport_header(skb
) - skb_network_header(skb
));
1973 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
1975 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1976 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
1978 if (skb
->protocol
== htons(ETH_P_IP
))
1979 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
1980 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
1982 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
1985 mss_l4len_idx
= (skb_shinfo(skb
)->gso_size
<< E1000_ADVTXD_MSS_SHIFT
);
1986 mss_l4len_idx
|= (l4len
<< E1000_ADVTXD_L4LEN_SHIFT
);
1988 context_desc
->mss_l4len_idx
= cpu_to_le32(mss_l4len_idx
);
1989 context_desc
->seqnum_seed
= 0;
1991 buffer_info
->time_stamp
= jiffies
;
1992 buffer_info
->next_to_watch
= i
;
1993 buffer_info
->dma
= 0;
1995 if (i
== tx_ring
->count
)
1998 tx_ring
->next_to_use
= i
;
2003 static inline bool igbvf_tx_csum(struct igbvf_adapter
*adapter
,
2004 struct igbvf_ring
*tx_ring
,
2005 struct sk_buff
*skb
, u32 tx_flags
)
2007 struct e1000_adv_tx_context_desc
*context_desc
;
2009 struct igbvf_buffer
*buffer_info
;
2010 u32 info
= 0, tu_cmd
= 0;
2012 if ((skb
->ip_summed
== CHECKSUM_PARTIAL
) ||
2013 (tx_flags
& IGBVF_TX_FLAGS_VLAN
)) {
2014 i
= tx_ring
->next_to_use
;
2015 buffer_info
= &tx_ring
->buffer_info
[i
];
2016 context_desc
= IGBVF_TX_CTXTDESC_ADV(*tx_ring
, i
);
2018 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
2019 info
|= (tx_flags
& IGBVF_TX_FLAGS_VLAN_MASK
);
2021 info
|= (skb_network_offset(skb
) << E1000_ADVTXD_MACLEN_SHIFT
);
2022 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
2023 info
|= (skb_transport_header(skb
) -
2024 skb_network_header(skb
));
2027 context_desc
->vlan_macip_lens
= cpu_to_le32(info
);
2029 tu_cmd
|= (E1000_TXD_CMD_DEXT
| E1000_ADVTXD_DTYP_CTXT
);
2031 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
2032 switch (skb
->protocol
) {
2033 case __constant_htons(ETH_P_IP
):
2034 tu_cmd
|= E1000_ADVTXD_TUCMD_IPV4
;
2035 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2036 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2038 case __constant_htons(ETH_P_IPV6
):
2039 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2040 tu_cmd
|= E1000_ADVTXD_TUCMD_L4T_TCP
;
2047 context_desc
->type_tucmd_mlhl
= cpu_to_le32(tu_cmd
);
2048 context_desc
->seqnum_seed
= 0;
2049 context_desc
->mss_l4len_idx
= 0;
2051 buffer_info
->time_stamp
= jiffies
;
2052 buffer_info
->next_to_watch
= i
;
2053 buffer_info
->dma
= 0;
2055 if (i
== tx_ring
->count
)
2057 tx_ring
->next_to_use
= i
;
2065 static int igbvf_maybe_stop_tx(struct net_device
*netdev
, int size
)
2067 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2069 /* there is enough descriptors then we don't need to worry */
2070 if (igbvf_desc_unused(adapter
->tx_ring
) >= size
)
2073 netif_stop_queue(netdev
);
2077 /* We need to check again just in case room has been made available */
2078 if (igbvf_desc_unused(adapter
->tx_ring
) < size
)
2081 netif_wake_queue(netdev
);
2083 ++adapter
->restart_queue
;
2087 #define IGBVF_MAX_TXD_PWR 16
2088 #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR)
2090 static inline int igbvf_tx_map_adv(struct igbvf_adapter
*adapter
,
2091 struct igbvf_ring
*tx_ring
,
2092 struct sk_buff
*skb
,
2095 struct igbvf_buffer
*buffer_info
;
2096 struct pci_dev
*pdev
= adapter
->pdev
;
2097 unsigned int len
= skb_headlen(skb
);
2098 unsigned int count
= 0, i
;
2101 i
= tx_ring
->next_to_use
;
2103 buffer_info
= &tx_ring
->buffer_info
[i
];
2104 BUG_ON(len
>= IGBVF_MAX_DATA_PER_TXD
);
2105 buffer_info
->length
= len
;
2106 /* set time_stamp *before* dma to help avoid a possible race */
2107 buffer_info
->time_stamp
= jiffies
;
2108 buffer_info
->next_to_watch
= i
;
2109 buffer_info
->mapped_as_page
= false;
2110 buffer_info
->dma
= dma_map_single(&pdev
->dev
, skb
->data
, len
,
2112 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2116 for (f
= 0; f
< skb_shinfo(skb
)->nr_frags
; f
++) {
2117 struct skb_frag_struct
*frag
;
2121 if (i
== tx_ring
->count
)
2124 frag
= &skb_shinfo(skb
)->frags
[f
];
2127 buffer_info
= &tx_ring
->buffer_info
[i
];
2128 BUG_ON(len
>= IGBVF_MAX_DATA_PER_TXD
);
2129 buffer_info
->length
= len
;
2130 buffer_info
->time_stamp
= jiffies
;
2131 buffer_info
->next_to_watch
= i
;
2132 buffer_info
->mapped_as_page
= true;
2133 buffer_info
->dma
= dma_map_page(&pdev
->dev
,
2138 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2142 tx_ring
->buffer_info
[i
].skb
= skb
;
2143 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2148 dev_err(&pdev
->dev
, "TX DMA map failed\n");
2150 /* clear timestamp and dma mappings for failed buffer_info mapping */
2151 buffer_info
->dma
= 0;
2152 buffer_info
->time_stamp
= 0;
2153 buffer_info
->length
= 0;
2154 buffer_info
->next_to_watch
= 0;
2155 buffer_info
->mapped_as_page
= false;
2159 /* clear timestamp and dma mappings for remaining portion of packet */
2162 i
+= tx_ring
->count
;
2164 buffer_info
= &tx_ring
->buffer_info
[i
];
2165 igbvf_put_txbuf(adapter
, buffer_info
);
2171 static inline void igbvf_tx_queue_adv(struct igbvf_adapter
*adapter
,
2172 struct igbvf_ring
*tx_ring
,
2173 int tx_flags
, int count
, u32 paylen
,
2176 union e1000_adv_tx_desc
*tx_desc
= NULL
;
2177 struct igbvf_buffer
*buffer_info
;
2178 u32 olinfo_status
= 0, cmd_type_len
;
2181 cmd_type_len
= (E1000_ADVTXD_DTYP_DATA
| E1000_ADVTXD_DCMD_IFCS
|
2182 E1000_ADVTXD_DCMD_DEXT
);
2184 if (tx_flags
& IGBVF_TX_FLAGS_VLAN
)
2185 cmd_type_len
|= E1000_ADVTXD_DCMD_VLE
;
2187 if (tx_flags
& IGBVF_TX_FLAGS_TSO
) {
2188 cmd_type_len
|= E1000_ADVTXD_DCMD_TSE
;
2190 /* insert tcp checksum */
2191 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2193 /* insert ip checksum */
2194 if (tx_flags
& IGBVF_TX_FLAGS_IPV4
)
2195 olinfo_status
|= E1000_TXD_POPTS_IXSM
<< 8;
2197 } else if (tx_flags
& IGBVF_TX_FLAGS_CSUM
) {
2198 olinfo_status
|= E1000_TXD_POPTS_TXSM
<< 8;
2201 olinfo_status
|= ((paylen
- hdr_len
) << E1000_ADVTXD_PAYLEN_SHIFT
);
2203 i
= tx_ring
->next_to_use
;
2205 buffer_info
= &tx_ring
->buffer_info
[i
];
2206 tx_desc
= IGBVF_TX_DESC_ADV(*tx_ring
, i
);
2207 tx_desc
->read
.buffer_addr
= cpu_to_le64(buffer_info
->dma
);
2208 tx_desc
->read
.cmd_type_len
=
2209 cpu_to_le32(cmd_type_len
| buffer_info
->length
);
2210 tx_desc
->read
.olinfo_status
= cpu_to_le32(olinfo_status
);
2212 if (i
== tx_ring
->count
)
2216 tx_desc
->read
.cmd_type_len
|= cpu_to_le32(adapter
->txd_cmd
);
2217 /* Force memory writes to complete before letting h/w
2218 * know there are new descriptors to fetch. (Only
2219 * applicable for weak-ordered memory model archs,
2220 * such as IA-64). */
2223 tx_ring
->next_to_use
= i
;
2224 writel(i
, adapter
->hw
.hw_addr
+ tx_ring
->tail
);
2225 /* we need this if more than one processor can write to our tail
2226 * at a time, it syncronizes IO on IA64/Altix systems */
2230 static netdev_tx_t
igbvf_xmit_frame_ring_adv(struct sk_buff
*skb
,
2231 struct net_device
*netdev
,
2232 struct igbvf_ring
*tx_ring
)
2234 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2235 unsigned int first
, tx_flags
= 0;
2240 if (test_bit(__IGBVF_DOWN
, &adapter
->state
)) {
2241 dev_kfree_skb_any(skb
);
2242 return NETDEV_TX_OK
;
2245 if (skb
->len
<= 0) {
2246 dev_kfree_skb_any(skb
);
2247 return NETDEV_TX_OK
;
2251 * need: count + 4 desc gap to keep tail from touching
2252 * + 2 desc gap to keep tail from touching head,
2253 * + 1 desc for skb->data,
2254 * + 1 desc for context descriptor,
2255 * head, otherwise try next time
2257 if (igbvf_maybe_stop_tx(netdev
, skb_shinfo(skb
)->nr_frags
+ 4)) {
2258 /* this is a hard error */
2259 return NETDEV_TX_BUSY
;
2262 if (adapter
->vlgrp
&& vlan_tx_tag_present(skb
)) {
2263 tx_flags
|= IGBVF_TX_FLAGS_VLAN
;
2264 tx_flags
|= (vlan_tx_tag_get(skb
) << IGBVF_TX_FLAGS_VLAN_SHIFT
);
2267 if (skb
->protocol
== htons(ETH_P_IP
))
2268 tx_flags
|= IGBVF_TX_FLAGS_IPV4
;
2270 first
= tx_ring
->next_to_use
;
2272 tso
= skb_is_gso(skb
) ?
2273 igbvf_tso(adapter
, tx_ring
, skb
, tx_flags
, &hdr_len
) : 0;
2274 if (unlikely(tso
< 0)) {
2275 dev_kfree_skb_any(skb
);
2276 return NETDEV_TX_OK
;
2280 tx_flags
|= IGBVF_TX_FLAGS_TSO
;
2281 else if (igbvf_tx_csum(adapter
, tx_ring
, skb
, tx_flags
) &&
2282 (skb
->ip_summed
== CHECKSUM_PARTIAL
))
2283 tx_flags
|= IGBVF_TX_FLAGS_CSUM
;
2286 * count reflects descriptors mapped, if 0 then mapping error
2287 * has occured and we need to rewind the descriptor queue
2289 count
= igbvf_tx_map_adv(adapter
, tx_ring
, skb
, first
);
2292 igbvf_tx_queue_adv(adapter
, tx_ring
, tx_flags
, count
,
2294 /* Make sure there is space in the ring for the next send. */
2295 igbvf_maybe_stop_tx(netdev
, MAX_SKB_FRAGS
+ 4);
2297 dev_kfree_skb_any(skb
);
2298 tx_ring
->buffer_info
[first
].time_stamp
= 0;
2299 tx_ring
->next_to_use
= first
;
2302 return NETDEV_TX_OK
;
2305 static netdev_tx_t
igbvf_xmit_frame(struct sk_buff
*skb
,
2306 struct net_device
*netdev
)
2308 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2309 struct igbvf_ring
*tx_ring
;
2311 if (test_bit(__IGBVF_DOWN
, &adapter
->state
)) {
2312 dev_kfree_skb_any(skb
);
2313 return NETDEV_TX_OK
;
2316 tx_ring
= &adapter
->tx_ring
[0];
2318 return igbvf_xmit_frame_ring_adv(skb
, netdev
, tx_ring
);
2322 * igbvf_tx_timeout - Respond to a Tx Hang
2323 * @netdev: network interface device structure
2325 static void igbvf_tx_timeout(struct net_device
*netdev
)
2327 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2329 /* Do the reset outside of interrupt context */
2330 adapter
->tx_timeout_count
++;
2331 schedule_work(&adapter
->reset_task
);
2334 static void igbvf_reset_task(struct work_struct
*work
)
2336 struct igbvf_adapter
*adapter
;
2337 adapter
= container_of(work
, struct igbvf_adapter
, reset_task
);
2339 igbvf_reinit_locked(adapter
);
2343 * igbvf_get_stats - Get System Network Statistics
2344 * @netdev: network interface device structure
2346 * Returns the address of the device statistics structure.
2347 * The statistics are actually updated from the timer callback.
2349 static struct net_device_stats
*igbvf_get_stats(struct net_device
*netdev
)
2351 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2353 /* only return the current stats */
2354 return &adapter
->net_stats
;
2358 * igbvf_change_mtu - Change the Maximum Transfer Unit
2359 * @netdev: network interface device structure
2360 * @new_mtu: new value for maximum frame size
2362 * Returns 0 on success, negative on failure
2364 static int igbvf_change_mtu(struct net_device
*netdev
, int new_mtu
)
2366 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2367 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
2369 if ((new_mtu
< 68) || (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
2370 dev_err(&adapter
->pdev
->dev
, "Invalid MTU setting\n");
2374 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2375 if (max_frame
> MAX_STD_JUMBO_FRAME_SIZE
) {
2376 dev_err(&adapter
->pdev
->dev
, "MTU > 9216 not supported.\n");
2380 while (test_and_set_bit(__IGBVF_RESETTING
, &adapter
->state
))
2382 /* igbvf_down has a dependency on max_frame_size */
2383 adapter
->max_frame_size
= max_frame
;
2384 if (netif_running(netdev
))
2385 igbvf_down(adapter
);
2388 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2389 * means we reserve 2 more, this pushes us to allocate from the next
2391 * i.e. RXBUFFER_2048 --> size-4096 slab
2392 * However with the new *_jumbo_rx* routines, jumbo receives will use
2396 if (max_frame
<= 1024)
2397 adapter
->rx_buffer_len
= 1024;
2398 else if (max_frame
<= 2048)
2399 adapter
->rx_buffer_len
= 2048;
2401 #if (PAGE_SIZE / 2) > 16384
2402 adapter
->rx_buffer_len
= 16384;
2404 adapter
->rx_buffer_len
= PAGE_SIZE
/ 2;
2408 /* adjust allocation if LPE protects us, and we aren't using SBP */
2409 if ((max_frame
== ETH_FRAME_LEN
+ ETH_FCS_LEN
) ||
2410 (max_frame
== ETH_FRAME_LEN
+ VLAN_HLEN
+ ETH_FCS_LEN
))
2411 adapter
->rx_buffer_len
= ETH_FRAME_LEN
+ VLAN_HLEN
+
2414 dev_info(&adapter
->pdev
->dev
, "changing MTU from %d to %d\n",
2415 netdev
->mtu
, new_mtu
);
2416 netdev
->mtu
= new_mtu
;
2418 if (netif_running(netdev
))
2421 igbvf_reset(adapter
);
2423 clear_bit(__IGBVF_RESETTING
, &adapter
->state
);
2428 static int igbvf_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
2436 static int igbvf_suspend(struct pci_dev
*pdev
, pm_message_t state
)
2438 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2439 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2444 netif_device_detach(netdev
);
2446 if (netif_running(netdev
)) {
2447 WARN_ON(test_bit(__IGBVF_RESETTING
, &adapter
->state
));
2448 igbvf_down(adapter
);
2449 igbvf_free_irq(adapter
);
2453 retval
= pci_save_state(pdev
);
2458 pci_disable_device(pdev
);
2464 static int igbvf_resume(struct pci_dev
*pdev
)
2466 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2467 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2470 pci_restore_state(pdev
);
2471 err
= pci_enable_device_mem(pdev
);
2473 dev_err(&pdev
->dev
, "Cannot enable PCI device from suspend\n");
2477 pci_set_master(pdev
);
2479 if (netif_running(netdev
)) {
2480 err
= igbvf_request_irq(adapter
);
2485 igbvf_reset(adapter
);
2487 if (netif_running(netdev
))
2490 netif_device_attach(netdev
);
2496 static void igbvf_shutdown(struct pci_dev
*pdev
)
2498 igbvf_suspend(pdev
, PMSG_SUSPEND
);
2501 #ifdef CONFIG_NET_POLL_CONTROLLER
2503 * Polling 'interrupt' - used by things like netconsole to send skbs
2504 * without having to re-enable interrupts. It's not called while
2505 * the interrupt routine is executing.
2507 static void igbvf_netpoll(struct net_device
*netdev
)
2509 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2511 disable_irq(adapter
->pdev
->irq
);
2513 igbvf_clean_tx_irq(adapter
->tx_ring
);
2515 enable_irq(adapter
->pdev
->irq
);
2520 * igbvf_io_error_detected - called when PCI error is detected
2521 * @pdev: Pointer to PCI device
2522 * @state: The current pci connection state
2524 * This function is called after a PCI bus error affecting
2525 * this device has been detected.
2527 static pci_ers_result_t
igbvf_io_error_detected(struct pci_dev
*pdev
,
2528 pci_channel_state_t state
)
2530 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2531 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2533 netif_device_detach(netdev
);
2535 if (state
== pci_channel_io_perm_failure
)
2536 return PCI_ERS_RESULT_DISCONNECT
;
2538 if (netif_running(netdev
))
2539 igbvf_down(adapter
);
2540 pci_disable_device(pdev
);
2542 /* Request a slot slot reset. */
2543 return PCI_ERS_RESULT_NEED_RESET
;
2547 * igbvf_io_slot_reset - called after the pci bus has been reset.
2548 * @pdev: Pointer to PCI device
2550 * Restart the card from scratch, as if from a cold-boot. Implementation
2551 * resembles the first-half of the igbvf_resume routine.
2553 static pci_ers_result_t
igbvf_io_slot_reset(struct pci_dev
*pdev
)
2555 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2556 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2558 if (pci_enable_device_mem(pdev
)) {
2560 "Cannot re-enable PCI device after reset.\n");
2561 return PCI_ERS_RESULT_DISCONNECT
;
2563 pci_set_master(pdev
);
2565 igbvf_reset(adapter
);
2567 return PCI_ERS_RESULT_RECOVERED
;
2571 * igbvf_io_resume - called when traffic can start flowing again.
2572 * @pdev: Pointer to PCI device
2574 * This callback is called when the error recovery driver tells us that
2575 * its OK to resume normal operation. Implementation resembles the
2576 * second-half of the igbvf_resume routine.
2578 static void igbvf_io_resume(struct pci_dev
*pdev
)
2580 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2581 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2583 if (netif_running(netdev
)) {
2584 if (igbvf_up(adapter
)) {
2586 "can't bring device back up after reset\n");
2591 netif_device_attach(netdev
);
2594 static void igbvf_print_device_info(struct igbvf_adapter
*adapter
)
2596 struct e1000_hw
*hw
= &adapter
->hw
;
2597 struct net_device
*netdev
= adapter
->netdev
;
2598 struct pci_dev
*pdev
= adapter
->pdev
;
2600 dev_info(&pdev
->dev
, "Intel(R) 82576 Virtual Function\n");
2601 dev_info(&pdev
->dev
, "Address: %pM\n", netdev
->dev_addr
);
2602 dev_info(&pdev
->dev
, "MAC: %d\n", hw
->mac
.type
);
2605 static const struct net_device_ops igbvf_netdev_ops
= {
2606 .ndo_open
= igbvf_open
,
2607 .ndo_stop
= igbvf_close
,
2608 .ndo_start_xmit
= igbvf_xmit_frame
,
2609 .ndo_get_stats
= igbvf_get_stats
,
2610 .ndo_set_multicast_list
= igbvf_set_multi
,
2611 .ndo_set_mac_address
= igbvf_set_mac
,
2612 .ndo_change_mtu
= igbvf_change_mtu
,
2613 .ndo_do_ioctl
= igbvf_ioctl
,
2614 .ndo_tx_timeout
= igbvf_tx_timeout
,
2615 .ndo_vlan_rx_register
= igbvf_vlan_rx_register
,
2616 .ndo_vlan_rx_add_vid
= igbvf_vlan_rx_add_vid
,
2617 .ndo_vlan_rx_kill_vid
= igbvf_vlan_rx_kill_vid
,
2618 #ifdef CONFIG_NET_POLL_CONTROLLER
2619 .ndo_poll_controller
= igbvf_netpoll
,
2624 * igbvf_probe - Device Initialization Routine
2625 * @pdev: PCI device information struct
2626 * @ent: entry in igbvf_pci_tbl
2628 * Returns 0 on success, negative on failure
2630 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2631 * The OS initialization, configuring of the adapter private structure,
2632 * and a hardware reset occur.
2634 static int __devinit
igbvf_probe(struct pci_dev
*pdev
,
2635 const struct pci_device_id
*ent
)
2637 struct net_device
*netdev
;
2638 struct igbvf_adapter
*adapter
;
2639 struct e1000_hw
*hw
;
2640 const struct igbvf_info
*ei
= igbvf_info_tbl
[ent
->driver_data
];
2642 static int cards_found
;
2643 int err
, pci_using_dac
;
2645 err
= pci_enable_device_mem(pdev
);
2650 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(64));
2652 err
= dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(64));
2656 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32));
2658 err
= dma_set_coherent_mask(&pdev
->dev
,
2661 dev_err(&pdev
->dev
, "No usable DMA "
2662 "configuration, aborting\n");
2668 err
= pci_request_regions(pdev
, igbvf_driver_name
);
2672 pci_set_master(pdev
);
2675 netdev
= alloc_etherdev(sizeof(struct igbvf_adapter
));
2677 goto err_alloc_etherdev
;
2679 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
2681 pci_set_drvdata(pdev
, netdev
);
2682 adapter
= netdev_priv(netdev
);
2684 adapter
->netdev
= netdev
;
2685 adapter
->pdev
= pdev
;
2687 adapter
->pba
= ei
->pba
;
2688 adapter
->flags
= ei
->flags
;
2689 adapter
->hw
.back
= adapter
;
2690 adapter
->hw
.mac
.type
= ei
->mac
;
2691 adapter
->msg_enable
= (1 << NETIF_MSG_DRV
| NETIF_MSG_PROBE
) - 1;
2693 /* PCI config space info */
2695 hw
->vendor_id
= pdev
->vendor
;
2696 hw
->device_id
= pdev
->device
;
2697 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
2698 hw
->subsystem_device_id
= pdev
->subsystem_device
;
2700 pci_read_config_byte(pdev
, PCI_REVISION_ID
, &hw
->revision_id
);
2703 adapter
->hw
.hw_addr
= ioremap(pci_resource_start(pdev
, 0),
2704 pci_resource_len(pdev
, 0));
2706 if (!adapter
->hw
.hw_addr
)
2709 if (ei
->get_variants
) {
2710 err
= ei
->get_variants(adapter
);
2715 /* setup adapter struct */
2716 err
= igbvf_sw_init(adapter
);
2720 /* construct the net_device struct */
2721 netdev
->netdev_ops
= &igbvf_netdev_ops
;
2723 igbvf_set_ethtool_ops(netdev
);
2724 netdev
->watchdog_timeo
= 5 * HZ
;
2725 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
2727 adapter
->bd_number
= cards_found
++;
2729 netdev
->features
= NETIF_F_SG
|
2731 NETIF_F_HW_VLAN_TX
|
2732 NETIF_F_HW_VLAN_RX
|
2733 NETIF_F_HW_VLAN_FILTER
;
2735 netdev
->features
|= NETIF_F_IPV6_CSUM
;
2736 netdev
->features
|= NETIF_F_TSO
;
2737 netdev
->features
|= NETIF_F_TSO6
;
2740 netdev
->features
|= NETIF_F_HIGHDMA
;
2742 netdev
->vlan_features
|= NETIF_F_TSO
;
2743 netdev
->vlan_features
|= NETIF_F_TSO6
;
2744 netdev
->vlan_features
|= NETIF_F_IP_CSUM
;
2745 netdev
->vlan_features
|= NETIF_F_IPV6_CSUM
;
2746 netdev
->vlan_features
|= NETIF_F_SG
;
2748 /*reset the controller to put the device in a known good state */
2749 err
= hw
->mac
.ops
.reset_hw(hw
);
2751 dev_info(&pdev
->dev
,
2752 "PF still in reset state, assigning new address."
2753 " Is the PF interface up?\n");
2754 random_ether_addr(hw
->mac
.addr
);
2756 err
= hw
->mac
.ops
.read_mac_addr(hw
);
2758 dev_err(&pdev
->dev
, "Error reading MAC address\n");
2763 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
2764 memcpy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
, netdev
->addr_len
);
2766 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
2767 dev_err(&pdev
->dev
, "Invalid MAC Address: %pM\n",
2773 setup_timer(&adapter
->watchdog_timer
, &igbvf_watchdog
,
2774 (unsigned long) adapter
);
2776 INIT_WORK(&adapter
->reset_task
, igbvf_reset_task
);
2777 INIT_WORK(&adapter
->watchdog_task
, igbvf_watchdog_task
);
2779 /* ring size defaults */
2780 adapter
->rx_ring
->count
= 1024;
2781 adapter
->tx_ring
->count
= 1024;
2783 /* reset the hardware with the new settings */
2784 igbvf_reset(adapter
);
2786 /* tell the stack to leave us alone until igbvf_open() is called */
2787 netif_carrier_off(netdev
);
2788 netif_stop_queue(netdev
);
2790 strcpy(netdev
->name
, "eth%d");
2791 err
= register_netdev(netdev
);
2795 igbvf_print_device_info(adapter
);
2797 igbvf_initialize_last_counter_stats(adapter
);
2802 kfree(adapter
->tx_ring
);
2803 kfree(adapter
->rx_ring
);
2805 igbvf_reset_interrupt_capability(adapter
);
2806 iounmap(adapter
->hw
.hw_addr
);
2808 free_netdev(netdev
);
2810 pci_release_regions(pdev
);
2813 pci_disable_device(pdev
);
2818 * igbvf_remove - Device Removal Routine
2819 * @pdev: PCI device information struct
2821 * igbvf_remove is called by the PCI subsystem to alert the driver
2822 * that it should release a PCI device. The could be caused by a
2823 * Hot-Plug event, or because the driver is going to be removed from
2826 static void __devexit
igbvf_remove(struct pci_dev
*pdev
)
2828 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2829 struct igbvf_adapter
*adapter
= netdev_priv(netdev
);
2830 struct e1000_hw
*hw
= &adapter
->hw
;
2833 * flush_scheduled work may reschedule our watchdog task, so
2834 * explicitly disable watchdog tasks from being rescheduled
2836 set_bit(__IGBVF_DOWN
, &adapter
->state
);
2837 del_timer_sync(&adapter
->watchdog_timer
);
2839 flush_scheduled_work();
2841 unregister_netdev(netdev
);
2843 igbvf_reset_interrupt_capability(adapter
);
2846 * it is important to delete the napi struct prior to freeing the
2847 * rx ring so that you do not end up with null pointer refs
2849 netif_napi_del(&adapter
->rx_ring
->napi
);
2850 kfree(adapter
->tx_ring
);
2851 kfree(adapter
->rx_ring
);
2853 iounmap(hw
->hw_addr
);
2854 if (hw
->flash_address
)
2855 iounmap(hw
->flash_address
);
2856 pci_release_regions(pdev
);
2858 free_netdev(netdev
);
2860 pci_disable_device(pdev
);
2863 /* PCI Error Recovery (ERS) */
2864 static struct pci_error_handlers igbvf_err_handler
= {
2865 .error_detected
= igbvf_io_error_detected
,
2866 .slot_reset
= igbvf_io_slot_reset
,
2867 .resume
= igbvf_io_resume
,
2870 static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl
) = {
2871 { PCI_VDEVICE(INTEL
, E1000_DEV_ID_82576_VF
), board_vf
},
2872 { } /* terminate list */
2874 MODULE_DEVICE_TABLE(pci
, igbvf_pci_tbl
);
2876 /* PCI Device API Driver */
2877 static struct pci_driver igbvf_driver
= {
2878 .name
= igbvf_driver_name
,
2879 .id_table
= igbvf_pci_tbl
,
2880 .probe
= igbvf_probe
,
2881 .remove
= __devexit_p(igbvf_remove
),
2883 /* Power Management Hooks */
2884 .suspend
= igbvf_suspend
,
2885 .resume
= igbvf_resume
,
2887 .shutdown
= igbvf_shutdown
,
2888 .err_handler
= &igbvf_err_handler
2892 * igbvf_init_module - Driver Registration Routine
2894 * igbvf_init_module is the first routine called when the driver is
2895 * loaded. All it does is register with the PCI subsystem.
2897 static int __init
igbvf_init_module(void)
2900 printk(KERN_INFO
"%s - version %s\n",
2901 igbvf_driver_string
, igbvf_driver_version
);
2902 printk(KERN_INFO
"%s\n", igbvf_copyright
);
2904 ret
= pci_register_driver(&igbvf_driver
);
2905 igbvf_driver_pm_qos_req
= pm_qos_add_request(PM_QOS_CPU_DMA_LATENCY
,
2906 PM_QOS_DEFAULT_VALUE
);
2910 module_init(igbvf_init_module
);
2913 * igbvf_exit_module - Driver Exit Cleanup Routine
2915 * igbvf_exit_module is called just before the driver is removed
2918 static void __exit
igbvf_exit_module(void)
2920 pci_unregister_driver(&igbvf_driver
);
2921 pm_qos_remove_request(igbvf_driver_pm_qos_req
);
2922 igbvf_driver_pm_qos_req
= NULL
;
2924 module_exit(igbvf_exit_module
);
2927 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2928 MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver");
2929 MODULE_LICENSE("GPL");
2930 MODULE_VERSION(DRV_VERSION
);