1 /*******************************************************************************
3 Intel 82599 Virtual Function driver
4 Copyright(c) 1999 - 2015 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, see <http://www.gnu.org/licenses/>.
18 The full GNU General Public License is included in this distribution in
19 the file called "COPYING".
22 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *******************************************************************************/
27 /******************************************************************************
28 Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
29 ******************************************************************************/
31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
33 #include <linux/types.h>
34 #include <linux/bitops.h>
35 #include <linux/module.h>
36 #include <linux/pci.h>
37 #include <linux/netdevice.h>
38 #include <linux/vmalloc.h>
39 #include <linux/string.h>
42 #include <linux/tcp.h>
43 #include <linux/sctp.h>
44 #include <linux/ipv6.h>
45 #include <linux/slab.h>
46 #include <net/checksum.h>
47 #include <net/ip6_checksum.h>
48 #include <linux/ethtool.h>
50 #include <linux/if_vlan.h>
51 #include <linux/prefetch.h>
55 const char ixgbevf_driver_name
[] = "ixgbevf";
56 static const char ixgbevf_driver_string
[] =
57 "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
59 #define DRV_VERSION "2.12.1-k"
60 const char ixgbevf_driver_version
[] = DRV_VERSION
;
61 static char ixgbevf_copyright
[] =
62 "Copyright (c) 2009 - 2012 Intel Corporation.";
64 static const struct ixgbevf_info
*ixgbevf_info_tbl
[] = {
65 [board_82599_vf
] = &ixgbevf_82599_vf_info
,
66 [board_X540_vf
] = &ixgbevf_X540_vf_info
,
67 [board_X550_vf
] = &ixgbevf_X550_vf_info
,
68 [board_X550EM_x_vf
] = &ixgbevf_X550EM_x_vf_info
,
71 /* ixgbevf_pci_tbl - PCI Device ID Table
73 * Wildcard entries (PCI_ANY_ID) should come last
74 * Last entry must be all 0s
76 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
77 * Class, Class Mask, private data (not used) }
79 static const struct pci_device_id ixgbevf_pci_tbl
[] = {
80 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_82599_VF
), board_82599_vf
},
81 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X540_VF
), board_X540_vf
},
82 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X550_VF
), board_X550_vf
},
83 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X550EM_X_VF
), board_X550EM_x_vf
},
84 /* required last entry */
87 MODULE_DEVICE_TABLE(pci
, ixgbevf_pci_tbl
);
89 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
90 MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");
91 MODULE_LICENSE("GPL");
92 MODULE_VERSION(DRV_VERSION
);
94 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
95 static int debug
= -1;
96 module_param(debug
, int, 0);
97 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
99 static void ixgbevf_service_event_schedule(struct ixgbevf_adapter
*adapter
)
101 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
) &&
102 !test_bit(__IXGBEVF_REMOVING
, &adapter
->state
) &&
103 !test_and_set_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
))
104 schedule_work(&adapter
->service_task
);
107 static void ixgbevf_service_event_complete(struct ixgbevf_adapter
*adapter
)
109 BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
));
111 /* flush memory to make sure state is correct before next watchdog */
112 smp_mb__before_atomic();
113 clear_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
);
117 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter
*adapter
);
118 static void ixgbevf_set_itr(struct ixgbevf_q_vector
*q_vector
);
119 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter
*adapter
);
121 static void ixgbevf_remove_adapter(struct ixgbe_hw
*hw
)
123 struct ixgbevf_adapter
*adapter
= hw
->back
;
128 dev_err(&adapter
->pdev
->dev
, "Adapter removed\n");
129 if (test_bit(__IXGBEVF_SERVICE_INITED
, &adapter
->state
))
130 ixgbevf_service_event_schedule(adapter
);
133 static void ixgbevf_check_remove(struct ixgbe_hw
*hw
, u32 reg
)
137 /* The following check not only optimizes a bit by not
138 * performing a read on the status register when the
139 * register just read was a status register read that
140 * returned IXGBE_FAILED_READ_REG. It also blocks any
141 * potential recursion.
143 if (reg
== IXGBE_VFSTATUS
) {
144 ixgbevf_remove_adapter(hw
);
147 value
= ixgbevf_read_reg(hw
, IXGBE_VFSTATUS
);
148 if (value
== IXGBE_FAILED_READ_REG
)
149 ixgbevf_remove_adapter(hw
);
152 u32
ixgbevf_read_reg(struct ixgbe_hw
*hw
, u32 reg
)
154 u8 __iomem
*reg_addr
= ACCESS_ONCE(hw
->hw_addr
);
157 if (IXGBE_REMOVED(reg_addr
))
158 return IXGBE_FAILED_READ_REG
;
159 value
= readl(reg_addr
+ reg
);
160 if (unlikely(value
== IXGBE_FAILED_READ_REG
))
161 ixgbevf_check_remove(hw
, reg
);
166 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
167 * @adapter: pointer to adapter struct
168 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
169 * @queue: queue to map the corresponding interrupt to
170 * @msix_vector: the vector to map to the corresponding queue
172 static void ixgbevf_set_ivar(struct ixgbevf_adapter
*adapter
, s8 direction
,
173 u8 queue
, u8 msix_vector
)
176 struct ixgbe_hw
*hw
= &adapter
->hw
;
178 if (direction
== -1) {
180 msix_vector
|= IXGBE_IVAR_ALLOC_VAL
;
181 ivar
= IXGBE_READ_REG(hw
, IXGBE_VTIVAR_MISC
);
184 IXGBE_WRITE_REG(hw
, IXGBE_VTIVAR_MISC
, ivar
);
186 /* Tx or Rx causes */
187 msix_vector
|= IXGBE_IVAR_ALLOC_VAL
;
188 index
= ((16 * (queue
& 1)) + (8 * direction
));
189 ivar
= IXGBE_READ_REG(hw
, IXGBE_VTIVAR(queue
>> 1));
190 ivar
&= ~(0xFF << index
);
191 ivar
|= (msix_vector
<< index
);
192 IXGBE_WRITE_REG(hw
, IXGBE_VTIVAR(queue
>> 1), ivar
);
196 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring
*tx_ring
,
197 struct ixgbevf_tx_buffer
*tx_buffer
)
199 if (tx_buffer
->skb
) {
200 dev_kfree_skb_any(tx_buffer
->skb
);
201 if (dma_unmap_len(tx_buffer
, len
))
202 dma_unmap_single(tx_ring
->dev
,
203 dma_unmap_addr(tx_buffer
, dma
),
204 dma_unmap_len(tx_buffer
, len
),
206 } else if (dma_unmap_len(tx_buffer
, len
)) {
207 dma_unmap_page(tx_ring
->dev
,
208 dma_unmap_addr(tx_buffer
, dma
),
209 dma_unmap_len(tx_buffer
, len
),
212 tx_buffer
->next_to_watch
= NULL
;
213 tx_buffer
->skb
= NULL
;
214 dma_unmap_len_set(tx_buffer
, len
, 0);
215 /* tx_buffer must be completely set up in the transmit path */
218 static u64
ixgbevf_get_tx_completed(struct ixgbevf_ring
*ring
)
220 return ring
->stats
.packets
;
223 static u32
ixgbevf_get_tx_pending(struct ixgbevf_ring
*ring
)
225 struct ixgbevf_adapter
*adapter
= netdev_priv(ring
->netdev
);
226 struct ixgbe_hw
*hw
= &adapter
->hw
;
228 u32 head
= IXGBE_READ_REG(hw
, IXGBE_VFTDH(ring
->reg_idx
));
229 u32 tail
= IXGBE_READ_REG(hw
, IXGBE_VFTDT(ring
->reg_idx
));
232 return (head
< tail
) ?
233 tail
- head
: (tail
+ ring
->count
- head
);
238 static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring
*tx_ring
)
240 u32 tx_done
= ixgbevf_get_tx_completed(tx_ring
);
241 u32 tx_done_old
= tx_ring
->tx_stats
.tx_done_old
;
242 u32 tx_pending
= ixgbevf_get_tx_pending(tx_ring
);
244 clear_check_for_tx_hang(tx_ring
);
246 /* Check for a hung queue, but be thorough. This verifies
247 * that a transmit has been completed since the previous
248 * check AND there is at least one packet pending. The
249 * ARMED bit is set to indicate a potential hang.
251 if ((tx_done_old
== tx_done
) && tx_pending
) {
252 /* make sure it is true for two checks in a row */
253 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED
,
256 /* reset the countdown */
257 clear_bit(__IXGBEVF_HANG_CHECK_ARMED
, &tx_ring
->state
);
259 /* update completed stats and continue */
260 tx_ring
->tx_stats
.tx_done_old
= tx_done
;
265 static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter
*adapter
)
267 /* Do the reset outside of interrupt context */
268 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
)) {
269 adapter
->flags
|= IXGBEVF_FLAG_RESET_REQUESTED
;
270 ixgbevf_service_event_schedule(adapter
);
275 * ixgbevf_tx_timeout - Respond to a Tx Hang
276 * @netdev: network interface device structure
278 static void ixgbevf_tx_timeout(struct net_device
*netdev
)
280 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
282 ixgbevf_tx_timeout_reset(adapter
);
286 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
287 * @q_vector: board private structure
288 * @tx_ring: tx ring to clean
290 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector
*q_vector
,
291 struct ixgbevf_ring
*tx_ring
)
293 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
294 struct ixgbevf_tx_buffer
*tx_buffer
;
295 union ixgbe_adv_tx_desc
*tx_desc
;
296 unsigned int total_bytes
= 0, total_packets
= 0;
297 unsigned int budget
= tx_ring
->count
/ 2;
298 unsigned int i
= tx_ring
->next_to_clean
;
300 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
))
303 tx_buffer
= &tx_ring
->tx_buffer_info
[i
];
304 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, i
);
308 union ixgbe_adv_tx_desc
*eop_desc
= tx_buffer
->next_to_watch
;
310 /* if next_to_watch is not set then there is no work pending */
314 /* prevent any other reads prior to eop_desc */
315 read_barrier_depends();
317 /* if DD is not set pending work has not been completed */
318 if (!(eop_desc
->wb
.status
& cpu_to_le32(IXGBE_TXD_STAT_DD
)))
321 /* clear next_to_watch to prevent false hangs */
322 tx_buffer
->next_to_watch
= NULL
;
324 /* update the statistics for this packet */
325 total_bytes
+= tx_buffer
->bytecount
;
326 total_packets
+= tx_buffer
->gso_segs
;
329 dev_kfree_skb_any(tx_buffer
->skb
);
331 /* unmap skb header data */
332 dma_unmap_single(tx_ring
->dev
,
333 dma_unmap_addr(tx_buffer
, dma
),
334 dma_unmap_len(tx_buffer
, len
),
337 /* clear tx_buffer data */
338 tx_buffer
->skb
= NULL
;
339 dma_unmap_len_set(tx_buffer
, len
, 0);
341 /* unmap remaining buffers */
342 while (tx_desc
!= eop_desc
) {
348 tx_buffer
= tx_ring
->tx_buffer_info
;
349 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
352 /* unmap any remaining paged data */
353 if (dma_unmap_len(tx_buffer
, len
)) {
354 dma_unmap_page(tx_ring
->dev
,
355 dma_unmap_addr(tx_buffer
, dma
),
356 dma_unmap_len(tx_buffer
, len
),
358 dma_unmap_len_set(tx_buffer
, len
, 0);
362 /* move us one more past the eop_desc for start of next pkt */
368 tx_buffer
= tx_ring
->tx_buffer_info
;
369 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
372 /* issue prefetch for next Tx descriptor */
375 /* update budget accounting */
377 } while (likely(budget
));
380 tx_ring
->next_to_clean
= i
;
381 u64_stats_update_begin(&tx_ring
->syncp
);
382 tx_ring
->stats
.bytes
+= total_bytes
;
383 tx_ring
->stats
.packets
+= total_packets
;
384 u64_stats_update_end(&tx_ring
->syncp
);
385 q_vector
->tx
.total_bytes
+= total_bytes
;
386 q_vector
->tx
.total_packets
+= total_packets
;
388 if (check_for_tx_hang(tx_ring
) && ixgbevf_check_tx_hang(tx_ring
)) {
389 struct ixgbe_hw
*hw
= &adapter
->hw
;
390 union ixgbe_adv_tx_desc
*eop_desc
;
392 eop_desc
= tx_ring
->tx_buffer_info
[i
].next_to_watch
;
394 pr_err("Detected Tx Unit Hang\n"
396 " TDH, TDT <%x>, <%x>\n"
397 " next_to_use <%x>\n"
398 " next_to_clean <%x>\n"
399 "tx_buffer_info[next_to_clean]\n"
400 " next_to_watch <%p>\n"
401 " eop_desc->wb.status <%x>\n"
402 " time_stamp <%lx>\n"
404 tx_ring
->queue_index
,
405 IXGBE_READ_REG(hw
, IXGBE_VFTDH(tx_ring
->reg_idx
)),
406 IXGBE_READ_REG(hw
, IXGBE_VFTDT(tx_ring
->reg_idx
)),
407 tx_ring
->next_to_use
, i
,
408 eop_desc
, (eop_desc
? eop_desc
->wb
.status
: 0),
409 tx_ring
->tx_buffer_info
[i
].time_stamp
, jiffies
);
411 netif_stop_subqueue(tx_ring
->netdev
, tx_ring
->queue_index
);
413 /* schedule immediate reset if we believe we hung */
414 ixgbevf_tx_timeout_reset(adapter
);
419 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
420 if (unlikely(total_packets
&& netif_carrier_ok(tx_ring
->netdev
) &&
421 (ixgbevf_desc_unused(tx_ring
) >= TX_WAKE_THRESHOLD
))) {
422 /* Make sure that anybody stopping the queue after this
423 * sees the new next_to_clean.
427 if (__netif_subqueue_stopped(tx_ring
->netdev
,
428 tx_ring
->queue_index
) &&
429 !test_bit(__IXGBEVF_DOWN
, &adapter
->state
)) {
430 netif_wake_subqueue(tx_ring
->netdev
,
431 tx_ring
->queue_index
);
432 ++tx_ring
->tx_stats
.restart_queue
;
440 * ixgbevf_rx_skb - Helper function to determine proper Rx method
441 * @q_vector: structure containing interrupt and ring information
442 * @skb: packet to send up
444 static void ixgbevf_rx_skb(struct ixgbevf_q_vector
*q_vector
,
447 #ifdef CONFIG_NET_RX_BUSY_POLL
448 skb_mark_napi_id(skb
, &q_vector
->napi
);
450 if (ixgbevf_qv_busy_polling(q_vector
)) {
451 netif_receive_skb(skb
);
452 /* exit early if we busy polled */
455 #endif /* CONFIG_NET_RX_BUSY_POLL */
457 napi_gro_receive(&q_vector
->napi
, skb
);
460 #define IXGBE_RSS_L4_TYPES_MASK \
461 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
462 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
463 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
464 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
466 static inline void ixgbevf_rx_hash(struct ixgbevf_ring
*ring
,
467 union ixgbe_adv_rx_desc
*rx_desc
,
472 if (!(ring
->netdev
->features
& NETIF_F_RXHASH
))
475 rss_type
= le16_to_cpu(rx_desc
->wb
.lower
.lo_dword
.hs_rss
.pkt_info
) &
476 IXGBE_RXDADV_RSSTYPE_MASK
;
481 skb_set_hash(skb
, le32_to_cpu(rx_desc
->wb
.lower
.hi_dword
.rss
),
482 (IXGBE_RSS_L4_TYPES_MASK
& (1ul << rss_type
)) ?
483 PKT_HASH_TYPE_L4
: PKT_HASH_TYPE_L3
);
487 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
488 * @ring: structure containig ring specific data
489 * @rx_desc: current Rx descriptor being processed
490 * @skb: skb currently being received and modified
492 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring
*ring
,
493 union ixgbe_adv_rx_desc
*rx_desc
,
496 skb_checksum_none_assert(skb
);
498 /* Rx csum disabled */
499 if (!(ring
->netdev
->features
& NETIF_F_RXCSUM
))
502 /* if IP and error */
503 if (ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_IPCS
) &&
504 ixgbevf_test_staterr(rx_desc
, IXGBE_RXDADV_ERR_IPE
)) {
505 ring
->rx_stats
.csum_err
++;
509 if (!ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_L4CS
))
512 if (ixgbevf_test_staterr(rx_desc
, IXGBE_RXDADV_ERR_TCPE
)) {
513 ring
->rx_stats
.csum_err
++;
517 /* It must be a TCP or UDP packet with a valid checksum */
518 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
522 * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor
523 * @rx_ring: rx descriptor ring packet is being transacted on
524 * @rx_desc: pointer to the EOP Rx descriptor
525 * @skb: pointer to current skb being populated
527 * This function checks the ring, descriptor, and packet information in
528 * order to populate the checksum, VLAN, protocol, and other fields within
531 static void ixgbevf_process_skb_fields(struct ixgbevf_ring
*rx_ring
,
532 union ixgbe_adv_rx_desc
*rx_desc
,
535 ixgbevf_rx_hash(rx_ring
, rx_desc
, skb
);
536 ixgbevf_rx_checksum(rx_ring
, rx_desc
, skb
);
538 if (ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_VP
)) {
539 u16 vid
= le16_to_cpu(rx_desc
->wb
.upper
.vlan
);
540 unsigned long *active_vlans
= netdev_priv(rx_ring
->netdev
);
542 if (test_bit(vid
& VLAN_VID_MASK
, active_vlans
))
543 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
), vid
);
546 skb
->protocol
= eth_type_trans(skb
, rx_ring
->netdev
);
550 * ixgbevf_is_non_eop - process handling of non-EOP buffers
551 * @rx_ring: Rx ring being processed
552 * @rx_desc: Rx descriptor for current buffer
553 * @skb: current socket buffer containing buffer in progress
555 * This function updates next to clean. If the buffer is an EOP buffer
556 * this function exits returning false, otherwise it will place the
557 * sk_buff in the next buffer to be chained and return true indicating
558 * that this is in fact a non-EOP buffer.
560 static bool ixgbevf_is_non_eop(struct ixgbevf_ring
*rx_ring
,
561 union ixgbe_adv_rx_desc
*rx_desc
)
563 u32 ntc
= rx_ring
->next_to_clean
+ 1;
565 /* fetch, update, and store next to clean */
566 ntc
= (ntc
< rx_ring
->count
) ? ntc
: 0;
567 rx_ring
->next_to_clean
= ntc
;
569 prefetch(IXGBEVF_RX_DESC(rx_ring
, ntc
));
571 if (likely(ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_EOP
)))
577 static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring
*rx_ring
,
578 struct ixgbevf_rx_buffer
*bi
)
580 struct page
*page
= bi
->page
;
581 dma_addr_t dma
= bi
->dma
;
583 /* since we are recycling buffers we should seldom need to alloc */
587 /* alloc new page for storage */
588 page
= dev_alloc_page();
589 if (unlikely(!page
)) {
590 rx_ring
->rx_stats
.alloc_rx_page_failed
++;
594 /* map page for use */
595 dma
= dma_map_page(rx_ring
->dev
, page
, 0,
596 PAGE_SIZE
, DMA_FROM_DEVICE
);
598 /* if mapping failed free memory back to system since
599 * there isn't much point in holding memory we can't use
601 if (dma_mapping_error(rx_ring
->dev
, dma
)) {
604 rx_ring
->rx_stats
.alloc_rx_buff_failed
++;
616 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
617 * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
618 * @cleaned_count: number of buffers to replace
620 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring
*rx_ring
,
623 union ixgbe_adv_rx_desc
*rx_desc
;
624 struct ixgbevf_rx_buffer
*bi
;
625 unsigned int i
= rx_ring
->next_to_use
;
627 /* nothing to do or no valid netdev defined */
628 if (!cleaned_count
|| !rx_ring
->netdev
)
631 rx_desc
= IXGBEVF_RX_DESC(rx_ring
, i
);
632 bi
= &rx_ring
->rx_buffer_info
[i
];
636 if (!ixgbevf_alloc_mapped_page(rx_ring
, bi
))
639 /* Refresh the desc even if pkt_addr didn't change
640 * because each write-back erases this info.
642 rx_desc
->read
.pkt_addr
= cpu_to_le64(bi
->dma
+ bi
->page_offset
);
648 rx_desc
= IXGBEVF_RX_DESC(rx_ring
, 0);
649 bi
= rx_ring
->rx_buffer_info
;
653 /* clear the hdr_addr for the next_to_use descriptor */
654 rx_desc
->read
.hdr_addr
= 0;
657 } while (cleaned_count
);
661 if (rx_ring
->next_to_use
!= i
) {
662 /* record the next descriptor to use */
663 rx_ring
->next_to_use
= i
;
665 /* update next to alloc since we have filled the ring */
666 rx_ring
->next_to_alloc
= i
;
668 /* Force memory writes to complete before letting h/w
669 * know there are new descriptors to fetch. (Only
670 * applicable for weak-ordered memory model archs,
674 ixgbevf_write_tail(rx_ring
, i
);
679 * ixgbevf_cleanup_headers - Correct corrupted or empty headers
680 * @rx_ring: rx descriptor ring packet is being transacted on
681 * @rx_desc: pointer to the EOP Rx descriptor
682 * @skb: pointer to current skb being fixed
684 * Check for corrupted packet headers caused by senders on the local L2
685 * embedded NIC switch not setting up their Tx Descriptors right. These
686 * should be very rare.
688 * Also address the case where we are pulling data in on pages only
689 * and as such no data is present in the skb header.
691 * In addition if skb is not at least 60 bytes we need to pad it so that
692 * it is large enough to qualify as a valid Ethernet frame.
694 * Returns true if an error was encountered and skb was freed.
696 static bool ixgbevf_cleanup_headers(struct ixgbevf_ring
*rx_ring
,
697 union ixgbe_adv_rx_desc
*rx_desc
,
700 /* verify that the packet does not have any known errors */
701 if (unlikely(ixgbevf_test_staterr(rx_desc
,
702 IXGBE_RXDADV_ERR_FRAME_ERR_MASK
))) {
703 struct net_device
*netdev
= rx_ring
->netdev
;
705 if (!(netdev
->features
& NETIF_F_RXALL
)) {
706 dev_kfree_skb_any(skb
);
711 /* if eth_skb_pad returns an error the skb was freed */
712 if (eth_skb_pad(skb
))
719 * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring
720 * @rx_ring: rx descriptor ring to store buffers on
721 * @old_buff: donor buffer to have page reused
723 * Synchronizes page for reuse by the adapter
725 static void ixgbevf_reuse_rx_page(struct ixgbevf_ring
*rx_ring
,
726 struct ixgbevf_rx_buffer
*old_buff
)
728 struct ixgbevf_rx_buffer
*new_buff
;
729 u16 nta
= rx_ring
->next_to_alloc
;
731 new_buff
= &rx_ring
->rx_buffer_info
[nta
];
733 /* update, and store next to alloc */
735 rx_ring
->next_to_alloc
= (nta
< rx_ring
->count
) ? nta
: 0;
737 /* transfer page from old buffer to new buffer */
738 new_buff
->page
= old_buff
->page
;
739 new_buff
->dma
= old_buff
->dma
;
740 new_buff
->page_offset
= old_buff
->page_offset
;
742 /* sync the buffer for use by the device */
743 dma_sync_single_range_for_device(rx_ring
->dev
, new_buff
->dma
,
744 new_buff
->page_offset
,
749 static inline bool ixgbevf_page_is_reserved(struct page
*page
)
751 return (page_to_nid(page
) != numa_mem_id()) || page_is_pfmemalloc(page
);
755 * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
756 * @rx_ring: rx descriptor ring to transact packets on
757 * @rx_buffer: buffer containing page to add
758 * @rx_desc: descriptor containing length of buffer written by hardware
759 * @skb: sk_buff to place the data into
761 * This function will add the data contained in rx_buffer->page to the skb.
762 * This is done either through a direct copy if the data in the buffer is
763 * less than the skb header size, otherwise it will just attach the page as
766 * The function will then update the page offset if necessary and return
767 * true if the buffer can be reused by the adapter.
769 static bool ixgbevf_add_rx_frag(struct ixgbevf_ring
*rx_ring
,
770 struct ixgbevf_rx_buffer
*rx_buffer
,
771 union ixgbe_adv_rx_desc
*rx_desc
,
774 struct page
*page
= rx_buffer
->page
;
775 unsigned char *va
= page_address(page
) + rx_buffer
->page_offset
;
776 unsigned int size
= le16_to_cpu(rx_desc
->wb
.upper
.length
);
777 #if (PAGE_SIZE < 8192)
778 unsigned int truesize
= IXGBEVF_RX_BUFSZ
;
780 unsigned int truesize
= ALIGN(size
, L1_CACHE_BYTES
);
782 unsigned int pull_len
;
784 if (unlikely(skb_is_nonlinear(skb
)))
787 if (likely(size
<= IXGBEVF_RX_HDR_SIZE
)) {
788 memcpy(__skb_put(skb
, size
), va
, ALIGN(size
, sizeof(long)));
790 /* page is not reserved, we can reuse buffer as is */
791 if (likely(!ixgbevf_page_is_reserved(page
)))
794 /* this page cannot be reused so discard it */
799 /* we need the header to contain the greater of either ETH_HLEN or
800 * 60 bytes if the skb->len is less than 60 for skb_pad.
802 pull_len
= eth_get_headlen(va
, IXGBEVF_RX_HDR_SIZE
);
804 /* align pull length to size of long to optimize memcpy performance */
805 memcpy(__skb_put(skb
, pull_len
), va
, ALIGN(pull_len
, sizeof(long)));
807 /* update all of the pointers */
812 skb_add_rx_frag(skb
, skb_shinfo(skb
)->nr_frags
, page
,
813 (unsigned long)va
& ~PAGE_MASK
, size
, truesize
);
815 /* avoid re-using remote pages */
816 if (unlikely(ixgbevf_page_is_reserved(page
)))
819 #if (PAGE_SIZE < 8192)
820 /* if we are only owner of page we can reuse it */
821 if (unlikely(page_count(page
) != 1))
824 /* flip page offset to other buffer */
825 rx_buffer
->page_offset
^= IXGBEVF_RX_BUFSZ
;
828 /* move offset up to the next cache line */
829 rx_buffer
->page_offset
+= truesize
;
831 if (rx_buffer
->page_offset
> (PAGE_SIZE
- IXGBEVF_RX_BUFSZ
))
835 /* Even if we own the page, we are not allowed to use atomic_set()
836 * This would break get_page_unless_zero() users.
838 atomic_inc(&page
->_count
);
843 static struct sk_buff
*ixgbevf_fetch_rx_buffer(struct ixgbevf_ring
*rx_ring
,
844 union ixgbe_adv_rx_desc
*rx_desc
,
847 struct ixgbevf_rx_buffer
*rx_buffer
;
850 rx_buffer
= &rx_ring
->rx_buffer_info
[rx_ring
->next_to_clean
];
851 page
= rx_buffer
->page
;
855 void *page_addr
= page_address(page
) +
856 rx_buffer
->page_offset
;
858 /* prefetch first cache line of first page */
860 #if L1_CACHE_BYTES < 128
861 prefetch(page_addr
+ L1_CACHE_BYTES
);
864 /* allocate a skb to store the frags */
865 skb
= netdev_alloc_skb_ip_align(rx_ring
->netdev
,
866 IXGBEVF_RX_HDR_SIZE
);
867 if (unlikely(!skb
)) {
868 rx_ring
->rx_stats
.alloc_rx_buff_failed
++;
872 /* we will be copying header into skb->data in
873 * pskb_may_pull so it is in our interest to prefetch
874 * it now to avoid a possible cache miss
876 prefetchw(skb
->data
);
879 /* we are reusing so sync this buffer for CPU use */
880 dma_sync_single_range_for_cpu(rx_ring
->dev
,
882 rx_buffer
->page_offset
,
886 /* pull page into skb */
887 if (ixgbevf_add_rx_frag(rx_ring
, rx_buffer
, rx_desc
, skb
)) {
888 /* hand second half of page back to the ring */
889 ixgbevf_reuse_rx_page(rx_ring
, rx_buffer
);
891 /* we are not reusing the buffer so unmap it */
892 dma_unmap_page(rx_ring
->dev
, rx_buffer
->dma
,
893 PAGE_SIZE
, DMA_FROM_DEVICE
);
896 /* clear contents of buffer_info */
898 rx_buffer
->page
= NULL
;
903 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter
*adapter
,
906 struct ixgbe_hw
*hw
= &adapter
->hw
;
908 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMS
, qmask
);
911 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector
*q_vector
,
912 struct ixgbevf_ring
*rx_ring
,
915 unsigned int total_rx_bytes
= 0, total_rx_packets
= 0;
916 u16 cleaned_count
= ixgbevf_desc_unused(rx_ring
);
917 struct sk_buff
*skb
= rx_ring
->skb
;
919 while (likely(total_rx_packets
< budget
)) {
920 union ixgbe_adv_rx_desc
*rx_desc
;
922 /* return some buffers to hardware, one at a time is too slow */
923 if (cleaned_count
>= IXGBEVF_RX_BUFFER_WRITE
) {
924 ixgbevf_alloc_rx_buffers(rx_ring
, cleaned_count
);
928 rx_desc
= IXGBEVF_RX_DESC(rx_ring
, rx_ring
->next_to_clean
);
930 if (!ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_DD
))
933 /* This memory barrier is needed to keep us from reading
934 * any other fields out of the rx_desc until we know the
935 * RXD_STAT_DD bit is set
939 /* retrieve a buffer from the ring */
940 skb
= ixgbevf_fetch_rx_buffer(rx_ring
, rx_desc
, skb
);
942 /* exit if we failed to retrieve a buffer */
948 /* fetch next buffer in frame if non-eop */
949 if (ixgbevf_is_non_eop(rx_ring
, rx_desc
))
952 /* verify the packet layout is correct */
953 if (ixgbevf_cleanup_headers(rx_ring
, rx_desc
, skb
)) {
958 /* probably a little skewed due to removing CRC */
959 total_rx_bytes
+= skb
->len
;
961 /* Workaround hardware that can't do proper VEPA multicast
964 if ((skb
->pkt_type
== PACKET_BROADCAST
||
965 skb
->pkt_type
== PACKET_MULTICAST
) &&
966 ether_addr_equal(rx_ring
->netdev
->dev_addr
,
967 eth_hdr(skb
)->h_source
)) {
968 dev_kfree_skb_irq(skb
);
972 /* populate checksum, VLAN, and protocol */
973 ixgbevf_process_skb_fields(rx_ring
, rx_desc
, skb
);
975 ixgbevf_rx_skb(q_vector
, skb
);
977 /* reset skb pointer */
980 /* update budget accounting */
984 /* place incomplete frames back on ring for completion */
987 u64_stats_update_begin(&rx_ring
->syncp
);
988 rx_ring
->stats
.packets
+= total_rx_packets
;
989 rx_ring
->stats
.bytes
+= total_rx_bytes
;
990 u64_stats_update_end(&rx_ring
->syncp
);
991 q_vector
->rx
.total_packets
+= total_rx_packets
;
992 q_vector
->rx
.total_bytes
+= total_rx_bytes
;
994 return total_rx_packets
;
998 * ixgbevf_poll - NAPI polling calback
999 * @napi: napi struct with our devices info in it
1000 * @budget: amount of work driver is allowed to do this pass, in packets
1002 * This function will clean more than one or more rings associated with a
1005 static int ixgbevf_poll(struct napi_struct
*napi
, int budget
)
1007 struct ixgbevf_q_vector
*q_vector
=
1008 container_of(napi
, struct ixgbevf_q_vector
, napi
);
1009 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
1010 struct ixgbevf_ring
*ring
;
1011 int per_ring_budget
, work_done
= 0;
1012 bool clean_complete
= true;
1014 ixgbevf_for_each_ring(ring
, q_vector
->tx
)
1015 clean_complete
&= ixgbevf_clean_tx_irq(q_vector
, ring
);
1017 #ifdef CONFIG_NET_RX_BUSY_POLL
1018 if (!ixgbevf_qv_lock_napi(q_vector
))
1022 /* attempt to distribute budget to each queue fairly, but don't allow
1023 * the budget to go below 1 because we'll exit polling
1025 if (q_vector
->rx
.count
> 1)
1026 per_ring_budget
= max(budget
/q_vector
->rx
.count
, 1);
1028 per_ring_budget
= budget
;
1030 ixgbevf_for_each_ring(ring
, q_vector
->rx
) {
1031 int cleaned
= ixgbevf_clean_rx_irq(q_vector
, ring
,
1033 work_done
+= cleaned
;
1034 clean_complete
&= (cleaned
< per_ring_budget
);
1037 #ifdef CONFIG_NET_RX_BUSY_POLL
1038 ixgbevf_qv_unlock_napi(q_vector
);
1041 /* If all work not completed, return budget and keep polling */
1042 if (!clean_complete
)
1044 /* all work done, exit the polling mode */
1045 napi_complete_done(napi
, work_done
);
1046 if (adapter
->rx_itr_setting
& 1)
1047 ixgbevf_set_itr(q_vector
);
1048 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
) &&
1049 !test_bit(__IXGBEVF_REMOVING
, &adapter
->state
))
1050 ixgbevf_irq_enable_queues(adapter
,
1051 1 << q_vector
->v_idx
);
1057 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
1058 * @q_vector: structure containing interrupt and ring information
1060 void ixgbevf_write_eitr(struct ixgbevf_q_vector
*q_vector
)
1062 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
1063 struct ixgbe_hw
*hw
= &adapter
->hw
;
1064 int v_idx
= q_vector
->v_idx
;
1065 u32 itr_reg
= q_vector
->itr
& IXGBE_MAX_EITR
;
1067 /* set the WDIS bit to not clear the timer bits and cause an
1068 * immediate assertion of the interrupt
1070 itr_reg
|= IXGBE_EITR_CNT_WDIS
;
1072 IXGBE_WRITE_REG(hw
, IXGBE_VTEITR(v_idx
), itr_reg
);
1075 #ifdef CONFIG_NET_RX_BUSY_POLL
1076 /* must be called with local_bh_disable()d */
1077 static int ixgbevf_busy_poll_recv(struct napi_struct
*napi
)
1079 struct ixgbevf_q_vector
*q_vector
=
1080 container_of(napi
, struct ixgbevf_q_vector
, napi
);
1081 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
1082 struct ixgbevf_ring
*ring
;
1085 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
))
1086 return LL_FLUSH_FAILED
;
1088 if (!ixgbevf_qv_lock_poll(q_vector
))
1089 return LL_FLUSH_BUSY
;
1091 ixgbevf_for_each_ring(ring
, q_vector
->rx
) {
1092 found
= ixgbevf_clean_rx_irq(q_vector
, ring
, 4);
1093 #ifdef BP_EXTENDED_STATS
1095 ring
->stats
.cleaned
+= found
;
1097 ring
->stats
.misses
++;
1103 ixgbevf_qv_unlock_poll(q_vector
);
1107 #endif /* CONFIG_NET_RX_BUSY_POLL */
1110 * ixgbevf_configure_msix - Configure MSI-X hardware
1111 * @adapter: board private structure
1113 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
1116 static void ixgbevf_configure_msix(struct ixgbevf_adapter
*adapter
)
1118 struct ixgbevf_q_vector
*q_vector
;
1119 int q_vectors
, v_idx
;
1121 q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1122 adapter
->eims_enable_mask
= 0;
1124 /* Populate the IVAR table and set the ITR values to the
1125 * corresponding register.
1127 for (v_idx
= 0; v_idx
< q_vectors
; v_idx
++) {
1128 struct ixgbevf_ring
*ring
;
1130 q_vector
= adapter
->q_vector
[v_idx
];
1132 ixgbevf_for_each_ring(ring
, q_vector
->rx
)
1133 ixgbevf_set_ivar(adapter
, 0, ring
->reg_idx
, v_idx
);
1135 ixgbevf_for_each_ring(ring
, q_vector
->tx
)
1136 ixgbevf_set_ivar(adapter
, 1, ring
->reg_idx
, v_idx
);
1138 if (q_vector
->tx
.ring
&& !q_vector
->rx
.ring
) {
1139 /* Tx only vector */
1140 if (adapter
->tx_itr_setting
== 1)
1141 q_vector
->itr
= IXGBE_10K_ITR
;
1143 q_vector
->itr
= adapter
->tx_itr_setting
;
1145 /* Rx or Rx/Tx vector */
1146 if (adapter
->rx_itr_setting
== 1)
1147 q_vector
->itr
= IXGBE_20K_ITR
;
1149 q_vector
->itr
= adapter
->rx_itr_setting
;
1152 /* add q_vector eims value to global eims_enable_mask */
1153 adapter
->eims_enable_mask
|= 1 << v_idx
;
1155 ixgbevf_write_eitr(q_vector
);
1158 ixgbevf_set_ivar(adapter
, -1, 1, v_idx
);
1159 /* setup eims_other and add value to global eims_enable_mask */
1160 adapter
->eims_other
= 1 << v_idx
;
1161 adapter
->eims_enable_mask
|= adapter
->eims_other
;
1164 enum latency_range
{
1168 latency_invalid
= 255
1172 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
1173 * @q_vector: structure containing interrupt and ring information
1174 * @ring_container: structure containing ring performance data
1176 * Stores a new ITR value based on packets and byte
1177 * counts during the last interrupt. The advantage of per interrupt
1178 * computation is faster updates and more accurate ITR for the current
1179 * traffic pattern. Constants in this function were computed
1180 * based on theoretical maximum wire speed and thresholds were set based
1181 * on testing data as well as attempting to minimize response time
1182 * while increasing bulk throughput.
1184 static void ixgbevf_update_itr(struct ixgbevf_q_vector
*q_vector
,
1185 struct ixgbevf_ring_container
*ring_container
)
1187 int bytes
= ring_container
->total_bytes
;
1188 int packets
= ring_container
->total_packets
;
1191 u8 itr_setting
= ring_container
->itr
;
1196 /* simple throttle rate management
1197 * 0-20MB/s lowest (100000 ints/s)
1198 * 20-100MB/s low (20000 ints/s)
1199 * 100-1249MB/s bulk (8000 ints/s)
1201 /* what was last interrupt timeslice? */
1202 timepassed_us
= q_vector
->itr
>> 2;
1203 bytes_perint
= bytes
/ timepassed_us
; /* bytes/usec */
1205 switch (itr_setting
) {
1206 case lowest_latency
:
1207 if (bytes_perint
> 10)
1208 itr_setting
= low_latency
;
1211 if (bytes_perint
> 20)
1212 itr_setting
= bulk_latency
;
1213 else if (bytes_perint
<= 10)
1214 itr_setting
= lowest_latency
;
1217 if (bytes_perint
<= 20)
1218 itr_setting
= low_latency
;
1222 /* clear work counters since we have the values we need */
1223 ring_container
->total_bytes
= 0;
1224 ring_container
->total_packets
= 0;
1226 /* write updated itr to ring container */
1227 ring_container
->itr
= itr_setting
;
1230 static void ixgbevf_set_itr(struct ixgbevf_q_vector
*q_vector
)
1232 u32 new_itr
= q_vector
->itr
;
1235 ixgbevf_update_itr(q_vector
, &q_vector
->tx
);
1236 ixgbevf_update_itr(q_vector
, &q_vector
->rx
);
1238 current_itr
= max(q_vector
->rx
.itr
, q_vector
->tx
.itr
);
1240 switch (current_itr
) {
1241 /* counts and packets in update_itr are dependent on these numbers */
1242 case lowest_latency
:
1243 new_itr
= IXGBE_100K_ITR
;
1246 new_itr
= IXGBE_20K_ITR
;
1250 new_itr
= IXGBE_8K_ITR
;
1254 if (new_itr
!= q_vector
->itr
) {
1255 /* do an exponential smoothing */
1256 new_itr
= (10 * new_itr
* q_vector
->itr
) /
1257 ((9 * new_itr
) + q_vector
->itr
);
1259 /* save the algorithm value here */
1260 q_vector
->itr
= new_itr
;
1262 ixgbevf_write_eitr(q_vector
);
1266 static irqreturn_t
ixgbevf_msix_other(int irq
, void *data
)
1268 struct ixgbevf_adapter
*adapter
= data
;
1269 struct ixgbe_hw
*hw
= &adapter
->hw
;
1271 hw
->mac
.get_link_status
= 1;
1273 ixgbevf_service_event_schedule(adapter
);
1275 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMS
, adapter
->eims_other
);
1281 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
1283 * @data: pointer to our q_vector struct for this interrupt vector
1285 static irqreturn_t
ixgbevf_msix_clean_rings(int irq
, void *data
)
1287 struct ixgbevf_q_vector
*q_vector
= data
;
1289 /* EIAM disabled interrupts (on this vector) for us */
1290 if (q_vector
->rx
.ring
|| q_vector
->tx
.ring
)
1291 napi_schedule(&q_vector
->napi
);
1296 static inline void map_vector_to_rxq(struct ixgbevf_adapter
*a
, int v_idx
,
1299 struct ixgbevf_q_vector
*q_vector
= a
->q_vector
[v_idx
];
1301 a
->rx_ring
[r_idx
]->next
= q_vector
->rx
.ring
;
1302 q_vector
->rx
.ring
= a
->rx_ring
[r_idx
];
1303 q_vector
->rx
.count
++;
1306 static inline void map_vector_to_txq(struct ixgbevf_adapter
*a
, int v_idx
,
1309 struct ixgbevf_q_vector
*q_vector
= a
->q_vector
[v_idx
];
1311 a
->tx_ring
[t_idx
]->next
= q_vector
->tx
.ring
;
1312 q_vector
->tx
.ring
= a
->tx_ring
[t_idx
];
1313 q_vector
->tx
.count
++;
1317 * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
1318 * @adapter: board private structure to initialize
1320 * This function maps descriptor rings to the queue-specific vectors
1321 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1322 * one vector per ring/queue, but on a constrained vector budget, we
1323 * group the rings as "efficiently" as possible. You would add new
1324 * mapping configurations in here.
1326 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter
*adapter
)
1330 int rxr_idx
= 0, txr_idx
= 0;
1331 int rxr_remaining
= adapter
->num_rx_queues
;
1332 int txr_remaining
= adapter
->num_tx_queues
;
1337 q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1339 /* The ideal configuration...
1340 * We have enough vectors to map one per queue.
1342 if (q_vectors
== adapter
->num_rx_queues
+ adapter
->num_tx_queues
) {
1343 for (; rxr_idx
< rxr_remaining
; v_start
++, rxr_idx
++)
1344 map_vector_to_rxq(adapter
, v_start
, rxr_idx
);
1346 for (; txr_idx
< txr_remaining
; v_start
++, txr_idx
++)
1347 map_vector_to_txq(adapter
, v_start
, txr_idx
);
1351 /* If we don't have enough vectors for a 1-to-1
1352 * mapping, we'll have to group them so there are
1353 * multiple queues per vector.
1355 /* Re-adjusting *qpv takes care of the remainder. */
1356 for (i
= v_start
; i
< q_vectors
; i
++) {
1357 rqpv
= DIV_ROUND_UP(rxr_remaining
, q_vectors
- i
);
1358 for (j
= 0; j
< rqpv
; j
++) {
1359 map_vector_to_rxq(adapter
, i
, rxr_idx
);
1364 for (i
= v_start
; i
< q_vectors
; i
++) {
1365 tqpv
= DIV_ROUND_UP(txr_remaining
, q_vectors
- i
);
1366 for (j
= 0; j
< tqpv
; j
++) {
1367 map_vector_to_txq(adapter
, i
, txr_idx
);
1378 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1379 * @adapter: board private structure
1381 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1382 * interrupts from the kernel.
1384 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter
*adapter
)
1386 struct net_device
*netdev
= adapter
->netdev
;
1387 int q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1391 for (vector
= 0; vector
< q_vectors
; vector
++) {
1392 struct ixgbevf_q_vector
*q_vector
= adapter
->q_vector
[vector
];
1393 struct msix_entry
*entry
= &adapter
->msix_entries
[vector
];
1395 if (q_vector
->tx
.ring
&& q_vector
->rx
.ring
) {
1396 snprintf(q_vector
->name
, sizeof(q_vector
->name
) - 1,
1397 "%s-%s-%d", netdev
->name
, "TxRx", ri
++);
1399 } else if (q_vector
->rx
.ring
) {
1400 snprintf(q_vector
->name
, sizeof(q_vector
->name
) - 1,
1401 "%s-%s-%d", netdev
->name
, "rx", ri
++);
1402 } else if (q_vector
->tx
.ring
) {
1403 snprintf(q_vector
->name
, sizeof(q_vector
->name
) - 1,
1404 "%s-%s-%d", netdev
->name
, "tx", ti
++);
1406 /* skip this unused q_vector */
1409 err
= request_irq(entry
->vector
, &ixgbevf_msix_clean_rings
, 0,
1410 q_vector
->name
, q_vector
);
1412 hw_dbg(&adapter
->hw
,
1413 "request_irq failed for MSIX interrupt Error: %d\n",
1415 goto free_queue_irqs
;
1419 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1420 &ixgbevf_msix_other
, 0, netdev
->name
, adapter
);
1422 hw_dbg(&adapter
->hw
, "request_irq for msix_other failed: %d\n",
1424 goto free_queue_irqs
;
1432 free_irq(adapter
->msix_entries
[vector
].vector
,
1433 adapter
->q_vector
[vector
]);
1435 /* This failure is non-recoverable - it indicates the system is
1436 * out of MSIX vector resources and the VF driver cannot run
1437 * without them. Set the number of msix vectors to zero
1438 * indicating that not enough can be allocated. The error
1439 * will be returned to the user indicating device open failed.
1440 * Any further attempts to force the driver to open will also
1441 * fail. The only way to recover is to unload the driver and
1442 * reload it again. If the system has recovered some MSIX
1443 * vectors then it may succeed.
1445 adapter
->num_msix_vectors
= 0;
1449 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter
*adapter
)
1451 int i
, q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1453 for (i
= 0; i
< q_vectors
; i
++) {
1454 struct ixgbevf_q_vector
*q_vector
= adapter
->q_vector
[i
];
1456 q_vector
->rx
.ring
= NULL
;
1457 q_vector
->tx
.ring
= NULL
;
1458 q_vector
->rx
.count
= 0;
1459 q_vector
->tx
.count
= 0;
1464 * ixgbevf_request_irq - initialize interrupts
1465 * @adapter: board private structure
1467 * Attempts to configure interrupts using the best available
1468 * capabilities of the hardware and kernel.
1470 static int ixgbevf_request_irq(struct ixgbevf_adapter
*adapter
)
1474 err
= ixgbevf_request_msix_irqs(adapter
);
1477 hw_dbg(&adapter
->hw
, "request_irq failed, Error %d\n", err
);
1482 static void ixgbevf_free_irq(struct ixgbevf_adapter
*adapter
)
1486 q_vectors
= adapter
->num_msix_vectors
;
1489 free_irq(adapter
->msix_entries
[i
].vector
, adapter
);
1492 for (; i
>= 0; i
--) {
1493 /* free only the irqs that were actually requested */
1494 if (!adapter
->q_vector
[i
]->rx
.ring
&&
1495 !adapter
->q_vector
[i
]->tx
.ring
)
1498 free_irq(adapter
->msix_entries
[i
].vector
,
1499 adapter
->q_vector
[i
]);
1502 ixgbevf_reset_q_vectors(adapter
);
1506 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1507 * @adapter: board private structure
1509 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter
*adapter
)
1511 struct ixgbe_hw
*hw
= &adapter
->hw
;
1514 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAM
, 0);
1515 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMC
, ~0);
1516 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAC
, 0);
1518 IXGBE_WRITE_FLUSH(hw
);
1520 for (i
= 0; i
< adapter
->num_msix_vectors
; i
++)
1521 synchronize_irq(adapter
->msix_entries
[i
].vector
);
1525 * ixgbevf_irq_enable - Enable default interrupt generation settings
1526 * @adapter: board private structure
1528 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter
*adapter
)
1530 struct ixgbe_hw
*hw
= &adapter
->hw
;
1532 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAM
, adapter
->eims_enable_mask
);
1533 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAC
, adapter
->eims_enable_mask
);
1534 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMS
, adapter
->eims_enable_mask
);
1538 * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1539 * @adapter: board private structure
1540 * @ring: structure containing ring specific data
1542 * Configure the Tx descriptor ring after a reset.
1544 static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter
*adapter
,
1545 struct ixgbevf_ring
*ring
)
1547 struct ixgbe_hw
*hw
= &adapter
->hw
;
1548 u64 tdba
= ring
->dma
;
1550 u32 txdctl
= IXGBE_TXDCTL_ENABLE
;
1551 u8 reg_idx
= ring
->reg_idx
;
1553 /* disable queue to avoid issues while updating state */
1554 IXGBE_WRITE_REG(hw
, IXGBE_VFTXDCTL(reg_idx
), IXGBE_TXDCTL_SWFLSH
);
1555 IXGBE_WRITE_FLUSH(hw
);
1557 IXGBE_WRITE_REG(hw
, IXGBE_VFTDBAL(reg_idx
), tdba
& DMA_BIT_MASK(32));
1558 IXGBE_WRITE_REG(hw
, IXGBE_VFTDBAH(reg_idx
), tdba
>> 32);
1559 IXGBE_WRITE_REG(hw
, IXGBE_VFTDLEN(reg_idx
),
1560 ring
->count
* sizeof(union ixgbe_adv_tx_desc
));
1562 /* disable head writeback */
1563 IXGBE_WRITE_REG(hw
, IXGBE_VFTDWBAH(reg_idx
), 0);
1564 IXGBE_WRITE_REG(hw
, IXGBE_VFTDWBAL(reg_idx
), 0);
1566 /* enable relaxed ordering */
1567 IXGBE_WRITE_REG(hw
, IXGBE_VFDCA_TXCTRL(reg_idx
),
1568 (IXGBE_DCA_TXCTRL_DESC_RRO_EN
|
1569 IXGBE_DCA_TXCTRL_DATA_RRO_EN
));
1571 /* reset head and tail pointers */
1572 IXGBE_WRITE_REG(hw
, IXGBE_VFTDH(reg_idx
), 0);
1573 IXGBE_WRITE_REG(hw
, IXGBE_VFTDT(reg_idx
), 0);
1574 ring
->tail
= adapter
->io_addr
+ IXGBE_VFTDT(reg_idx
);
1576 /* reset ntu and ntc to place SW in sync with hardwdare */
1577 ring
->next_to_clean
= 0;
1578 ring
->next_to_use
= 0;
1580 /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1581 * to or less than the number of on chip descriptors, which is
1584 txdctl
|= (8 << 16); /* WTHRESH = 8 */
1586 /* Setting PTHRESH to 32 both improves performance */
1587 txdctl
|= (1 << 8) | /* HTHRESH = 1 */
1588 32; /* PTHRESH = 32 */
1590 clear_bit(__IXGBEVF_HANG_CHECK_ARMED
, &ring
->state
);
1592 IXGBE_WRITE_REG(hw
, IXGBE_VFTXDCTL(reg_idx
), txdctl
);
1594 /* poll to verify queue is enabled */
1596 usleep_range(1000, 2000);
1597 txdctl
= IXGBE_READ_REG(hw
, IXGBE_VFTXDCTL(reg_idx
));
1598 } while (--wait_loop
&& !(txdctl
& IXGBE_TXDCTL_ENABLE
));
1600 pr_err("Could not enable Tx Queue %d\n", reg_idx
);
1604 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1605 * @adapter: board private structure
1607 * Configure the Tx unit of the MAC after a reset.
1609 static void ixgbevf_configure_tx(struct ixgbevf_adapter
*adapter
)
1613 /* Setup the HW Tx Head and Tail descriptor pointers */
1614 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1615 ixgbevf_configure_tx_ring(adapter
, adapter
->tx_ring
[i
]);
1618 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1620 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter
*adapter
, int index
)
1622 struct ixgbe_hw
*hw
= &adapter
->hw
;
1625 srrctl
= IXGBE_SRRCTL_DROP_EN
;
1627 srrctl
|= IXGBEVF_RX_HDR_SIZE
<< IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT
;
1628 srrctl
|= IXGBEVF_RX_BUFSZ
>> IXGBE_SRRCTL_BSIZEPKT_SHIFT
;
1629 srrctl
|= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF
;
1631 IXGBE_WRITE_REG(hw
, IXGBE_VFSRRCTL(index
), srrctl
);
1634 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter
*adapter
)
1636 struct ixgbe_hw
*hw
= &adapter
->hw
;
1638 /* PSRTYPE must be initialized in 82599 */
1639 u32 psrtype
= IXGBE_PSRTYPE_TCPHDR
| IXGBE_PSRTYPE_UDPHDR
|
1640 IXGBE_PSRTYPE_IPV4HDR
| IXGBE_PSRTYPE_IPV6HDR
|
1641 IXGBE_PSRTYPE_L2HDR
;
1643 if (adapter
->num_rx_queues
> 1)
1646 IXGBE_WRITE_REG(hw
, IXGBE_VFPSRTYPE
, psrtype
);
1649 #define IXGBEVF_MAX_RX_DESC_POLL 10
1650 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter
*adapter
,
1651 struct ixgbevf_ring
*ring
)
1653 struct ixgbe_hw
*hw
= &adapter
->hw
;
1654 int wait_loop
= IXGBEVF_MAX_RX_DESC_POLL
;
1656 u8 reg_idx
= ring
->reg_idx
;
1658 if (IXGBE_REMOVED(hw
->hw_addr
))
1660 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1661 rxdctl
&= ~IXGBE_RXDCTL_ENABLE
;
1663 /* write value back with RXDCTL.ENABLE bit cleared */
1664 IXGBE_WRITE_REG(hw
, IXGBE_VFRXDCTL(reg_idx
), rxdctl
);
1666 /* the hardware may take up to 100us to really disable the Rx queue */
1669 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1670 } while (--wait_loop
&& (rxdctl
& IXGBE_RXDCTL_ENABLE
));
1673 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1677 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter
*adapter
,
1678 struct ixgbevf_ring
*ring
)
1680 struct ixgbe_hw
*hw
= &adapter
->hw
;
1681 int wait_loop
= IXGBEVF_MAX_RX_DESC_POLL
;
1683 u8 reg_idx
= ring
->reg_idx
;
1685 if (IXGBE_REMOVED(hw
->hw_addr
))
1688 usleep_range(1000, 2000);
1689 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1690 } while (--wait_loop
&& !(rxdctl
& IXGBE_RXDCTL_ENABLE
));
1693 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1697 static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter
*adapter
)
1699 struct ixgbe_hw
*hw
= &adapter
->hw
;
1700 u32 vfmrqc
= 0, vfreta
= 0;
1701 u16 rss_i
= adapter
->num_rx_queues
;
1704 /* Fill out hash function seeds */
1705 netdev_rss_key_fill(adapter
->rss_key
, sizeof(adapter
->rss_key
));
1706 for (i
= 0; i
< IXGBEVF_VFRSSRK_REGS
; i
++)
1707 IXGBE_WRITE_REG(hw
, IXGBE_VFRSSRK(i
), adapter
->rss_key
[i
]);
1709 for (i
= 0, j
= 0; i
< IXGBEVF_X550_VFRETA_SIZE
; i
++, j
++) {
1713 adapter
->rss_indir_tbl
[i
] = j
;
1715 vfreta
|= j
<< (i
& 0x3) * 8;
1717 IXGBE_WRITE_REG(hw
, IXGBE_VFRETA(i
>> 2), vfreta
);
1722 /* Perform hash on these packet types */
1723 vfmrqc
|= IXGBE_VFMRQC_RSS_FIELD_IPV4
|
1724 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP
|
1725 IXGBE_VFMRQC_RSS_FIELD_IPV6
|
1726 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP
;
1728 vfmrqc
|= IXGBE_VFMRQC_RSSEN
;
1730 IXGBE_WRITE_REG(hw
, IXGBE_VFMRQC
, vfmrqc
);
1733 static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter
*adapter
,
1734 struct ixgbevf_ring
*ring
)
1736 struct ixgbe_hw
*hw
= &adapter
->hw
;
1737 u64 rdba
= ring
->dma
;
1739 u8 reg_idx
= ring
->reg_idx
;
1741 /* disable queue to avoid issues while updating state */
1742 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1743 ixgbevf_disable_rx_queue(adapter
, ring
);
1745 IXGBE_WRITE_REG(hw
, IXGBE_VFRDBAL(reg_idx
), rdba
& DMA_BIT_MASK(32));
1746 IXGBE_WRITE_REG(hw
, IXGBE_VFRDBAH(reg_idx
), rdba
>> 32);
1747 IXGBE_WRITE_REG(hw
, IXGBE_VFRDLEN(reg_idx
),
1748 ring
->count
* sizeof(union ixgbe_adv_rx_desc
));
1750 /* enable relaxed ordering */
1751 IXGBE_WRITE_REG(hw
, IXGBE_VFDCA_RXCTRL(reg_idx
),
1752 IXGBE_DCA_RXCTRL_DESC_RRO_EN
);
1754 /* reset head and tail pointers */
1755 IXGBE_WRITE_REG(hw
, IXGBE_VFRDH(reg_idx
), 0);
1756 IXGBE_WRITE_REG(hw
, IXGBE_VFRDT(reg_idx
), 0);
1757 ring
->tail
= adapter
->io_addr
+ IXGBE_VFRDT(reg_idx
);
1759 /* reset ntu and ntc to place SW in sync with hardwdare */
1760 ring
->next_to_clean
= 0;
1761 ring
->next_to_use
= 0;
1762 ring
->next_to_alloc
= 0;
1764 ixgbevf_configure_srrctl(adapter
, reg_idx
);
1766 /* allow any size packet since we can handle overflow */
1767 rxdctl
&= ~IXGBE_RXDCTL_RLPML_EN
;
1769 rxdctl
|= IXGBE_RXDCTL_ENABLE
| IXGBE_RXDCTL_VME
;
1770 IXGBE_WRITE_REG(hw
, IXGBE_VFRXDCTL(reg_idx
), rxdctl
);
1772 ixgbevf_rx_desc_queue_enable(adapter
, ring
);
1773 ixgbevf_alloc_rx_buffers(ring
, ixgbevf_desc_unused(ring
));
1777 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1778 * @adapter: board private structure
1780 * Configure the Rx unit of the MAC after a reset.
1782 static void ixgbevf_configure_rx(struct ixgbevf_adapter
*adapter
)
1785 struct ixgbe_hw
*hw
= &adapter
->hw
;
1786 struct net_device
*netdev
= adapter
->netdev
;
1788 ixgbevf_setup_psrtype(adapter
);
1789 if (hw
->mac
.type
>= ixgbe_mac_X550_vf
)
1790 ixgbevf_setup_vfmrqc(adapter
);
1792 /* notify the PF of our intent to use this size of frame */
1793 ixgbevf_rlpml_set_vf(hw
, netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
);
1795 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1796 * the Base and Length of the Rx Descriptor Ring
1798 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
1799 ixgbevf_configure_rx_ring(adapter
, adapter
->rx_ring
[i
]);
1802 static int ixgbevf_vlan_rx_add_vid(struct net_device
*netdev
,
1803 __be16 proto
, u16 vid
)
1805 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1806 struct ixgbe_hw
*hw
= &adapter
->hw
;
1809 spin_lock_bh(&adapter
->mbx_lock
);
1811 /* add VID to filter table */
1812 err
= hw
->mac
.ops
.set_vfta(hw
, vid
, 0, true);
1814 spin_unlock_bh(&adapter
->mbx_lock
);
1816 /* translate error return types so error makes sense */
1817 if (err
== IXGBE_ERR_MBX
)
1820 if (err
== IXGBE_ERR_INVALID_ARGUMENT
)
1823 set_bit(vid
, adapter
->active_vlans
);
1828 static int ixgbevf_vlan_rx_kill_vid(struct net_device
*netdev
,
1829 __be16 proto
, u16 vid
)
1831 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1832 struct ixgbe_hw
*hw
= &adapter
->hw
;
1833 int err
= -EOPNOTSUPP
;
1835 spin_lock_bh(&adapter
->mbx_lock
);
1837 /* remove VID from filter table */
1838 err
= hw
->mac
.ops
.set_vfta(hw
, vid
, 0, false);
1840 spin_unlock_bh(&adapter
->mbx_lock
);
1842 clear_bit(vid
, adapter
->active_vlans
);
1847 static void ixgbevf_restore_vlan(struct ixgbevf_adapter
*adapter
)
1851 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
1852 ixgbevf_vlan_rx_add_vid(adapter
->netdev
,
1853 htons(ETH_P_8021Q
), vid
);
1856 static int ixgbevf_write_uc_addr_list(struct net_device
*netdev
)
1858 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1859 struct ixgbe_hw
*hw
= &adapter
->hw
;
1862 if ((netdev_uc_count(netdev
)) > 10) {
1863 pr_err("Too many unicast filters - No Space\n");
1867 if (!netdev_uc_empty(netdev
)) {
1868 struct netdev_hw_addr
*ha
;
1870 netdev_for_each_uc_addr(ha
, netdev
) {
1871 hw
->mac
.ops
.set_uc_addr(hw
, ++count
, ha
->addr
);
1875 /* If the list is empty then send message to PF driver to
1876 * clear all MAC VLANs on this VF.
1878 hw
->mac
.ops
.set_uc_addr(hw
, 0, NULL
);
1885 * ixgbevf_set_rx_mode - Multicast and unicast set
1886 * @netdev: network interface device structure
1888 * The set_rx_method entry point is called whenever the multicast address
1889 * list, unicast address list or the network interface flags are updated.
1890 * This routine is responsible for configuring the hardware for proper
1891 * multicast mode and configuring requested unicast filters.
1893 static void ixgbevf_set_rx_mode(struct net_device
*netdev
)
1895 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1896 struct ixgbe_hw
*hw
= &adapter
->hw
;
1897 unsigned int flags
= netdev
->flags
;
1900 xcast_mode
= (flags
& IFF_ALLMULTI
) ? IXGBEVF_XCAST_MODE_ALLMULTI
:
1901 (flags
& (IFF_BROADCAST
| IFF_MULTICAST
)) ?
1902 IXGBEVF_XCAST_MODE_MULTI
: IXGBEVF_XCAST_MODE_NONE
;
1904 spin_lock_bh(&adapter
->mbx_lock
);
1906 hw
->mac
.ops
.update_xcast_mode(hw
, netdev
, xcast_mode
);
1908 /* reprogram multicast list */
1909 hw
->mac
.ops
.update_mc_addr_list(hw
, netdev
);
1911 ixgbevf_write_uc_addr_list(netdev
);
1913 spin_unlock_bh(&adapter
->mbx_lock
);
1916 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter
*adapter
)
1919 struct ixgbevf_q_vector
*q_vector
;
1920 int q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1922 for (q_idx
= 0; q_idx
< q_vectors
; q_idx
++) {
1923 q_vector
= adapter
->q_vector
[q_idx
];
1924 #ifdef CONFIG_NET_RX_BUSY_POLL
1925 ixgbevf_qv_init_lock(adapter
->q_vector
[q_idx
]);
1927 napi_enable(&q_vector
->napi
);
1931 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter
*adapter
)
1934 struct ixgbevf_q_vector
*q_vector
;
1935 int q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1937 for (q_idx
= 0; q_idx
< q_vectors
; q_idx
++) {
1938 q_vector
= adapter
->q_vector
[q_idx
];
1939 napi_disable(&q_vector
->napi
);
1940 #ifdef CONFIG_NET_RX_BUSY_POLL
1941 while (!ixgbevf_qv_disable(adapter
->q_vector
[q_idx
])) {
1942 pr_info("QV %d locked\n", q_idx
);
1943 usleep_range(1000, 20000);
1945 #endif /* CONFIG_NET_RX_BUSY_POLL */
1949 static int ixgbevf_configure_dcb(struct ixgbevf_adapter
*adapter
)
1951 struct ixgbe_hw
*hw
= &adapter
->hw
;
1952 unsigned int def_q
= 0;
1953 unsigned int num_tcs
= 0;
1954 unsigned int num_rx_queues
= adapter
->num_rx_queues
;
1955 unsigned int num_tx_queues
= adapter
->num_tx_queues
;
1958 spin_lock_bh(&adapter
->mbx_lock
);
1960 /* fetch queue configuration from the PF */
1961 err
= ixgbevf_get_queues(hw
, &num_tcs
, &def_q
);
1963 spin_unlock_bh(&adapter
->mbx_lock
);
1969 /* we need only one Tx queue */
1972 /* update default Tx ring register index */
1973 adapter
->tx_ring
[0]->reg_idx
= def_q
;
1975 /* we need as many queues as traffic classes */
1976 num_rx_queues
= num_tcs
;
1979 /* if we have a bad config abort request queue reset */
1980 if ((adapter
->num_rx_queues
!= num_rx_queues
) ||
1981 (adapter
->num_tx_queues
!= num_tx_queues
)) {
1982 /* force mailbox timeout to prevent further messages */
1983 hw
->mbx
.timeout
= 0;
1985 /* wait for watchdog to come around and bail us out */
1986 adapter
->flags
|= IXGBEVF_FLAG_QUEUE_RESET_REQUESTED
;
1992 static void ixgbevf_configure(struct ixgbevf_adapter
*adapter
)
1994 ixgbevf_configure_dcb(adapter
);
1996 ixgbevf_set_rx_mode(adapter
->netdev
);
1998 ixgbevf_restore_vlan(adapter
);
2000 ixgbevf_configure_tx(adapter
);
2001 ixgbevf_configure_rx(adapter
);
2004 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter
*adapter
)
2006 /* Only save pre-reset stats if there are some */
2007 if (adapter
->stats
.vfgprc
|| adapter
->stats
.vfgptc
) {
2008 adapter
->stats
.saved_reset_vfgprc
+= adapter
->stats
.vfgprc
-
2009 adapter
->stats
.base_vfgprc
;
2010 adapter
->stats
.saved_reset_vfgptc
+= adapter
->stats
.vfgptc
-
2011 adapter
->stats
.base_vfgptc
;
2012 adapter
->stats
.saved_reset_vfgorc
+= adapter
->stats
.vfgorc
-
2013 adapter
->stats
.base_vfgorc
;
2014 adapter
->stats
.saved_reset_vfgotc
+= adapter
->stats
.vfgotc
-
2015 adapter
->stats
.base_vfgotc
;
2016 adapter
->stats
.saved_reset_vfmprc
+= adapter
->stats
.vfmprc
-
2017 adapter
->stats
.base_vfmprc
;
2021 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter
*adapter
)
2023 struct ixgbe_hw
*hw
= &adapter
->hw
;
2025 adapter
->stats
.last_vfgprc
= IXGBE_READ_REG(hw
, IXGBE_VFGPRC
);
2026 adapter
->stats
.last_vfgorc
= IXGBE_READ_REG(hw
, IXGBE_VFGORC_LSB
);
2027 adapter
->stats
.last_vfgorc
|=
2028 (((u64
)(IXGBE_READ_REG(hw
, IXGBE_VFGORC_MSB
))) << 32);
2029 adapter
->stats
.last_vfgptc
= IXGBE_READ_REG(hw
, IXGBE_VFGPTC
);
2030 adapter
->stats
.last_vfgotc
= IXGBE_READ_REG(hw
, IXGBE_VFGOTC_LSB
);
2031 adapter
->stats
.last_vfgotc
|=
2032 (((u64
)(IXGBE_READ_REG(hw
, IXGBE_VFGOTC_MSB
))) << 32);
2033 adapter
->stats
.last_vfmprc
= IXGBE_READ_REG(hw
, IXGBE_VFMPRC
);
2035 adapter
->stats
.base_vfgprc
= adapter
->stats
.last_vfgprc
;
2036 adapter
->stats
.base_vfgorc
= adapter
->stats
.last_vfgorc
;
2037 adapter
->stats
.base_vfgptc
= adapter
->stats
.last_vfgptc
;
2038 adapter
->stats
.base_vfgotc
= adapter
->stats
.last_vfgotc
;
2039 adapter
->stats
.base_vfmprc
= adapter
->stats
.last_vfmprc
;
2042 static void ixgbevf_negotiate_api(struct ixgbevf_adapter
*adapter
)
2044 struct ixgbe_hw
*hw
= &adapter
->hw
;
2045 int api
[] = { ixgbe_mbox_api_12
,
2048 ixgbe_mbox_api_unknown
};
2049 int err
= 0, idx
= 0;
2051 spin_lock_bh(&adapter
->mbx_lock
);
2053 while (api
[idx
] != ixgbe_mbox_api_unknown
) {
2054 err
= ixgbevf_negotiate_api_version(hw
, api
[idx
]);
2060 spin_unlock_bh(&adapter
->mbx_lock
);
2063 static void ixgbevf_up_complete(struct ixgbevf_adapter
*adapter
)
2065 struct net_device
*netdev
= adapter
->netdev
;
2066 struct ixgbe_hw
*hw
= &adapter
->hw
;
2068 ixgbevf_configure_msix(adapter
);
2070 spin_lock_bh(&adapter
->mbx_lock
);
2072 if (is_valid_ether_addr(hw
->mac
.addr
))
2073 hw
->mac
.ops
.set_rar(hw
, 0, hw
->mac
.addr
, 0);
2075 hw
->mac
.ops
.set_rar(hw
, 0, hw
->mac
.perm_addr
, 0);
2077 spin_unlock_bh(&adapter
->mbx_lock
);
2079 smp_mb__before_atomic();
2080 clear_bit(__IXGBEVF_DOWN
, &adapter
->state
);
2081 ixgbevf_napi_enable_all(adapter
);
2083 /* clear any pending interrupts, may auto mask */
2084 IXGBE_READ_REG(hw
, IXGBE_VTEICR
);
2085 ixgbevf_irq_enable(adapter
);
2087 /* enable transmits */
2088 netif_tx_start_all_queues(netdev
);
2090 ixgbevf_save_reset_stats(adapter
);
2091 ixgbevf_init_last_counter_stats(adapter
);
2093 hw
->mac
.get_link_status
= 1;
2094 mod_timer(&adapter
->service_timer
, jiffies
);
2097 void ixgbevf_up(struct ixgbevf_adapter
*adapter
)
2099 ixgbevf_configure(adapter
);
2101 ixgbevf_up_complete(adapter
);
2105 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
2106 * @rx_ring: ring to free buffers from
2108 static void ixgbevf_clean_rx_ring(struct ixgbevf_ring
*rx_ring
)
2110 struct device
*dev
= rx_ring
->dev
;
2114 /* Free Rx ring sk_buff */
2116 dev_kfree_skb(rx_ring
->skb
);
2117 rx_ring
->skb
= NULL
;
2120 /* ring already cleared, nothing to do */
2121 if (!rx_ring
->rx_buffer_info
)
2124 /* Free all the Rx ring pages */
2125 for (i
= 0; i
< rx_ring
->count
; i
++) {
2126 struct ixgbevf_rx_buffer
*rx_buffer
;
2128 rx_buffer
= &rx_ring
->rx_buffer_info
[i
];
2130 dma_unmap_page(dev
, rx_buffer
->dma
,
2131 PAGE_SIZE
, DMA_FROM_DEVICE
);
2133 if (rx_buffer
->page
)
2134 __free_page(rx_buffer
->page
);
2135 rx_buffer
->page
= NULL
;
2138 size
= sizeof(struct ixgbevf_rx_buffer
) * rx_ring
->count
;
2139 memset(rx_ring
->rx_buffer_info
, 0, size
);
2141 /* Zero out the descriptor ring */
2142 memset(rx_ring
->desc
, 0, rx_ring
->size
);
2146 * ixgbevf_clean_tx_ring - Free Tx Buffers
2147 * @tx_ring: ring to be cleaned
2149 static void ixgbevf_clean_tx_ring(struct ixgbevf_ring
*tx_ring
)
2151 struct ixgbevf_tx_buffer
*tx_buffer_info
;
2155 if (!tx_ring
->tx_buffer_info
)
2158 /* Free all the Tx ring sk_buffs */
2159 for (i
= 0; i
< tx_ring
->count
; i
++) {
2160 tx_buffer_info
= &tx_ring
->tx_buffer_info
[i
];
2161 ixgbevf_unmap_and_free_tx_resource(tx_ring
, tx_buffer_info
);
2164 size
= sizeof(struct ixgbevf_tx_buffer
) * tx_ring
->count
;
2165 memset(tx_ring
->tx_buffer_info
, 0, size
);
2167 memset(tx_ring
->desc
, 0, tx_ring
->size
);
2171 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
2172 * @adapter: board private structure
2174 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter
*adapter
)
2178 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2179 ixgbevf_clean_rx_ring(adapter
->rx_ring
[i
]);
2183 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
2184 * @adapter: board private structure
2186 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter
*adapter
)
2190 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2191 ixgbevf_clean_tx_ring(adapter
->tx_ring
[i
]);
2194 void ixgbevf_down(struct ixgbevf_adapter
*adapter
)
2196 struct net_device
*netdev
= adapter
->netdev
;
2197 struct ixgbe_hw
*hw
= &adapter
->hw
;
2200 /* signal that we are down to the interrupt handler */
2201 if (test_and_set_bit(__IXGBEVF_DOWN
, &adapter
->state
))
2202 return; /* do nothing if already down */
2204 /* disable all enabled Rx queues */
2205 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2206 ixgbevf_disable_rx_queue(adapter
, adapter
->rx_ring
[i
]);
2208 usleep_range(10000, 20000);
2210 netif_tx_stop_all_queues(netdev
);
2212 /* call carrier off first to avoid false dev_watchdog timeouts */
2213 netif_carrier_off(netdev
);
2214 netif_tx_disable(netdev
);
2216 ixgbevf_irq_disable(adapter
);
2218 ixgbevf_napi_disable_all(adapter
);
2220 del_timer_sync(&adapter
->service_timer
);
2222 /* disable transmits in the hardware now that interrupts are off */
2223 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
2224 u8 reg_idx
= adapter
->tx_ring
[i
]->reg_idx
;
2226 IXGBE_WRITE_REG(hw
, IXGBE_VFTXDCTL(reg_idx
),
2227 IXGBE_TXDCTL_SWFLSH
);
2230 if (!pci_channel_offline(adapter
->pdev
))
2231 ixgbevf_reset(adapter
);
2233 ixgbevf_clean_all_tx_rings(adapter
);
2234 ixgbevf_clean_all_rx_rings(adapter
);
2237 void ixgbevf_reinit_locked(struct ixgbevf_adapter
*adapter
)
2239 WARN_ON(in_interrupt());
2241 while (test_and_set_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2244 ixgbevf_down(adapter
);
2245 ixgbevf_up(adapter
);
2247 clear_bit(__IXGBEVF_RESETTING
, &adapter
->state
);
2250 void ixgbevf_reset(struct ixgbevf_adapter
*adapter
)
2252 struct ixgbe_hw
*hw
= &adapter
->hw
;
2253 struct net_device
*netdev
= adapter
->netdev
;
2255 if (hw
->mac
.ops
.reset_hw(hw
)) {
2256 hw_dbg(hw
, "PF still resetting\n");
2258 hw
->mac
.ops
.init_hw(hw
);
2259 ixgbevf_negotiate_api(adapter
);
2262 if (is_valid_ether_addr(adapter
->hw
.mac
.addr
)) {
2263 memcpy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
,
2265 memcpy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
,
2269 adapter
->last_reset
= jiffies
;
2272 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter
*adapter
,
2275 int vector_threshold
;
2277 /* We'll want at least 2 (vector_threshold):
2278 * 1) TxQ[0] + RxQ[0] handler
2279 * 2) Other (Link Status Change, etc.)
2281 vector_threshold
= MIN_MSIX_COUNT
;
2283 /* The more we get, the more we will assign to Tx/Rx Cleanup
2284 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2285 * Right now, we simply care about how many we'll get; we'll
2286 * set them up later while requesting irq's.
2288 vectors
= pci_enable_msix_range(adapter
->pdev
, adapter
->msix_entries
,
2289 vector_threshold
, vectors
);
2292 dev_err(&adapter
->pdev
->dev
,
2293 "Unable to allocate MSI-X interrupts\n");
2294 kfree(adapter
->msix_entries
);
2295 adapter
->msix_entries
= NULL
;
2299 /* Adjust for only the vectors we'll use, which is minimum
2300 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
2301 * vectors we were allocated.
2303 adapter
->num_msix_vectors
= vectors
;
2309 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
2310 * @adapter: board private structure to initialize
2312 * This is the top level queue allocation routine. The order here is very
2313 * important, starting with the "most" number of features turned on at once,
2314 * and ending with the smallest set of features. This way large combinations
2315 * can be allocated if they're turned on, and smaller combinations are the
2316 * fallthrough conditions.
2319 static void ixgbevf_set_num_queues(struct ixgbevf_adapter
*adapter
)
2321 struct ixgbe_hw
*hw
= &adapter
->hw
;
2322 unsigned int def_q
= 0;
2323 unsigned int num_tcs
= 0;
2326 /* Start with base case */
2327 adapter
->num_rx_queues
= 1;
2328 adapter
->num_tx_queues
= 1;
2330 spin_lock_bh(&adapter
->mbx_lock
);
2332 /* fetch queue configuration from the PF */
2333 err
= ixgbevf_get_queues(hw
, &num_tcs
, &def_q
);
2335 spin_unlock_bh(&adapter
->mbx_lock
);
2340 /* we need as many queues as traffic classes */
2342 adapter
->num_rx_queues
= num_tcs
;
2344 u16 rss
= min_t(u16
, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES
);
2346 switch (hw
->api_version
) {
2347 case ixgbe_mbox_api_11
:
2348 case ixgbe_mbox_api_12
:
2349 adapter
->num_rx_queues
= rss
;
2350 adapter
->num_tx_queues
= rss
;
2358 * ixgbevf_alloc_queues - Allocate memory for all rings
2359 * @adapter: board private structure to initialize
2361 * We allocate one ring per queue at run-time since we don't know the
2362 * number of queues at compile-time. The polling_netdev array is
2363 * intended for Multiqueue, but should work fine with a single queue.
2365 static int ixgbevf_alloc_queues(struct ixgbevf_adapter
*adapter
)
2367 struct ixgbevf_ring
*ring
;
2370 for (; tx
< adapter
->num_tx_queues
; tx
++) {
2371 ring
= kzalloc(sizeof(*ring
), GFP_KERNEL
);
2373 goto err_allocation
;
2375 ring
->dev
= &adapter
->pdev
->dev
;
2376 ring
->netdev
= adapter
->netdev
;
2377 ring
->count
= adapter
->tx_ring_count
;
2378 ring
->queue_index
= tx
;
2381 adapter
->tx_ring
[tx
] = ring
;
2384 for (; rx
< adapter
->num_rx_queues
; rx
++) {
2385 ring
= kzalloc(sizeof(*ring
), GFP_KERNEL
);
2387 goto err_allocation
;
2389 ring
->dev
= &adapter
->pdev
->dev
;
2390 ring
->netdev
= adapter
->netdev
;
2392 ring
->count
= adapter
->rx_ring_count
;
2393 ring
->queue_index
= rx
;
2396 adapter
->rx_ring
[rx
] = ring
;
2403 kfree(adapter
->tx_ring
[--tx
]);
2404 adapter
->tx_ring
[tx
] = NULL
;
2408 kfree(adapter
->rx_ring
[--rx
]);
2409 adapter
->rx_ring
[rx
] = NULL
;
2415 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2416 * @adapter: board private structure to initialize
2418 * Attempt to configure the interrupts using the best available
2419 * capabilities of the hardware and the kernel.
2421 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter
*adapter
)
2423 struct net_device
*netdev
= adapter
->netdev
;
2425 int vector
, v_budget
;
2427 /* It's easy to be greedy for MSI-X vectors, but it really
2428 * doesn't do us much good if we have a lot more vectors
2429 * than CPU's. So let's be conservative and only ask for
2430 * (roughly) the same number of vectors as there are CPU's.
2431 * The default is to use pairs of vectors.
2433 v_budget
= max(adapter
->num_rx_queues
, adapter
->num_tx_queues
);
2434 v_budget
= min_t(int, v_budget
, num_online_cpus());
2435 v_budget
+= NON_Q_VECTORS
;
2437 /* A failure in MSI-X entry allocation isn't fatal, but it does
2438 * mean we disable MSI-X capabilities of the adapter.
2440 adapter
->msix_entries
= kcalloc(v_budget
,
2441 sizeof(struct msix_entry
), GFP_KERNEL
);
2442 if (!adapter
->msix_entries
) {
2447 for (vector
= 0; vector
< v_budget
; vector
++)
2448 adapter
->msix_entries
[vector
].entry
= vector
;
2450 err
= ixgbevf_acquire_msix_vectors(adapter
, v_budget
);
2454 err
= netif_set_real_num_tx_queues(netdev
, adapter
->num_tx_queues
);
2458 err
= netif_set_real_num_rx_queues(netdev
, adapter
->num_rx_queues
);
2465 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2466 * @adapter: board private structure to initialize
2468 * We allocate one q_vector per queue interrupt. If allocation fails we
2471 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter
*adapter
)
2473 int q_idx
, num_q_vectors
;
2474 struct ixgbevf_q_vector
*q_vector
;
2476 num_q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
2478 for (q_idx
= 0; q_idx
< num_q_vectors
; q_idx
++) {
2479 q_vector
= kzalloc(sizeof(struct ixgbevf_q_vector
), GFP_KERNEL
);
2482 q_vector
->adapter
= adapter
;
2483 q_vector
->v_idx
= q_idx
;
2484 netif_napi_add(adapter
->netdev
, &q_vector
->napi
,
2486 #ifdef CONFIG_NET_RX_BUSY_POLL
2487 napi_hash_add(&q_vector
->napi
);
2489 adapter
->q_vector
[q_idx
] = q_vector
;
2497 q_vector
= adapter
->q_vector
[q_idx
];
2498 #ifdef CONFIG_NET_RX_BUSY_POLL
2499 napi_hash_del(&q_vector
->napi
);
2501 netif_napi_del(&q_vector
->napi
);
2503 adapter
->q_vector
[q_idx
] = NULL
;
2509 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2510 * @adapter: board private structure to initialize
2512 * This function frees the memory allocated to the q_vectors. In addition if
2513 * NAPI is enabled it will delete any references to the NAPI struct prior
2514 * to freeing the q_vector.
2516 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter
*adapter
)
2518 int q_idx
, num_q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
2520 for (q_idx
= 0; q_idx
< num_q_vectors
; q_idx
++) {
2521 struct ixgbevf_q_vector
*q_vector
= adapter
->q_vector
[q_idx
];
2523 adapter
->q_vector
[q_idx
] = NULL
;
2524 #ifdef CONFIG_NET_RX_BUSY_POLL
2525 napi_hash_del(&q_vector
->napi
);
2527 netif_napi_del(&q_vector
->napi
);
2533 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2534 * @adapter: board private structure
2537 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter
*adapter
)
2539 pci_disable_msix(adapter
->pdev
);
2540 kfree(adapter
->msix_entries
);
2541 adapter
->msix_entries
= NULL
;
2545 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2546 * @adapter: board private structure to initialize
2549 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter
*adapter
)
2553 /* Number of supported queues */
2554 ixgbevf_set_num_queues(adapter
);
2556 err
= ixgbevf_set_interrupt_capability(adapter
);
2558 hw_dbg(&adapter
->hw
,
2559 "Unable to setup interrupt capabilities\n");
2560 goto err_set_interrupt
;
2563 err
= ixgbevf_alloc_q_vectors(adapter
);
2565 hw_dbg(&adapter
->hw
, "Unable to allocate memory for queue vectors\n");
2566 goto err_alloc_q_vectors
;
2569 err
= ixgbevf_alloc_queues(adapter
);
2571 pr_err("Unable to allocate memory for queues\n");
2572 goto err_alloc_queues
;
2575 hw_dbg(&adapter
->hw
, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
2576 (adapter
->num_rx_queues
> 1) ? "Enabled" :
2577 "Disabled", adapter
->num_rx_queues
, adapter
->num_tx_queues
);
2579 set_bit(__IXGBEVF_DOWN
, &adapter
->state
);
2583 ixgbevf_free_q_vectors(adapter
);
2584 err_alloc_q_vectors
:
2585 ixgbevf_reset_interrupt_capability(adapter
);
2591 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2592 * @adapter: board private structure to clear interrupt scheme on
2594 * We go through and clear interrupt specific resources and reset the structure
2595 * to pre-load conditions
2597 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter
*adapter
)
2601 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
2602 kfree(adapter
->tx_ring
[i
]);
2603 adapter
->tx_ring
[i
] = NULL
;
2605 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
2606 kfree(adapter
->rx_ring
[i
]);
2607 adapter
->rx_ring
[i
] = NULL
;
2610 adapter
->num_tx_queues
= 0;
2611 adapter
->num_rx_queues
= 0;
2613 ixgbevf_free_q_vectors(adapter
);
2614 ixgbevf_reset_interrupt_capability(adapter
);
2618 * ixgbevf_sw_init - Initialize general software structures
2619 * @adapter: board private structure to initialize
2621 * ixgbevf_sw_init initializes the Adapter private data structure.
2622 * Fields are initialized based on PCI device information and
2623 * OS network device settings (MTU size).
2625 static int ixgbevf_sw_init(struct ixgbevf_adapter
*adapter
)
2627 struct ixgbe_hw
*hw
= &adapter
->hw
;
2628 struct pci_dev
*pdev
= adapter
->pdev
;
2629 struct net_device
*netdev
= adapter
->netdev
;
2632 /* PCI config space info */
2633 hw
->vendor_id
= pdev
->vendor
;
2634 hw
->device_id
= pdev
->device
;
2635 hw
->revision_id
= pdev
->revision
;
2636 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
2637 hw
->subsystem_device_id
= pdev
->subsystem_device
;
2639 hw
->mbx
.ops
.init_params(hw
);
2641 /* assume legacy case in which PF would only give VF 2 queues */
2642 hw
->mac
.max_tx_queues
= 2;
2643 hw
->mac
.max_rx_queues
= 2;
2645 /* lock to protect mailbox accesses */
2646 spin_lock_init(&adapter
->mbx_lock
);
2648 err
= hw
->mac
.ops
.reset_hw(hw
);
2650 dev_info(&pdev
->dev
,
2651 "PF still in reset state. Is the PF interface up?\n");
2653 err
= hw
->mac
.ops
.init_hw(hw
);
2655 pr_err("init_shared_code failed: %d\n", err
);
2658 ixgbevf_negotiate_api(adapter
);
2659 err
= hw
->mac
.ops
.get_mac_addr(hw
, hw
->mac
.addr
);
2661 dev_info(&pdev
->dev
, "Error reading MAC address\n");
2662 else if (is_zero_ether_addr(adapter
->hw
.mac
.addr
))
2663 dev_info(&pdev
->dev
,
2664 "MAC address not assigned by administrator.\n");
2665 memcpy(netdev
->dev_addr
, hw
->mac
.addr
, netdev
->addr_len
);
2668 if (!is_valid_ether_addr(netdev
->dev_addr
)) {
2669 dev_info(&pdev
->dev
, "Assigning random MAC address\n");
2670 eth_hw_addr_random(netdev
);
2671 memcpy(hw
->mac
.addr
, netdev
->dev_addr
, netdev
->addr_len
);
2674 /* Enable dynamic interrupt throttling rates */
2675 adapter
->rx_itr_setting
= 1;
2676 adapter
->tx_itr_setting
= 1;
2678 /* set default ring sizes */
2679 adapter
->tx_ring_count
= IXGBEVF_DEFAULT_TXD
;
2680 adapter
->rx_ring_count
= IXGBEVF_DEFAULT_RXD
;
2682 set_bit(__IXGBEVF_DOWN
, &adapter
->state
);
2689 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
2691 u32 current_counter = IXGBE_READ_REG(hw, reg); \
2692 if (current_counter < last_counter) \
2693 counter += 0x100000000LL; \
2694 last_counter = current_counter; \
2695 counter &= 0xFFFFFFFF00000000LL; \
2696 counter |= current_counter; \
2699 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2701 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
2702 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
2703 u64 current_counter = (current_counter_msb << 32) | \
2704 current_counter_lsb; \
2705 if (current_counter < last_counter) \
2706 counter += 0x1000000000LL; \
2707 last_counter = current_counter; \
2708 counter &= 0xFFFFFFF000000000LL; \
2709 counter |= current_counter; \
2712 * ixgbevf_update_stats - Update the board statistics counters.
2713 * @adapter: board private structure
2715 void ixgbevf_update_stats(struct ixgbevf_adapter
*adapter
)
2717 struct ixgbe_hw
*hw
= &adapter
->hw
;
2720 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2721 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2724 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC
, adapter
->stats
.last_vfgprc
,
2725 adapter
->stats
.vfgprc
);
2726 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC
, adapter
->stats
.last_vfgptc
,
2727 adapter
->stats
.vfgptc
);
2728 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB
, IXGBE_VFGORC_MSB
,
2729 adapter
->stats
.last_vfgorc
,
2730 adapter
->stats
.vfgorc
);
2731 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB
, IXGBE_VFGOTC_MSB
,
2732 adapter
->stats
.last_vfgotc
,
2733 adapter
->stats
.vfgotc
);
2734 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC
, adapter
->stats
.last_vfmprc
,
2735 adapter
->stats
.vfmprc
);
2737 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
2738 adapter
->hw_csum_rx_error
+=
2739 adapter
->rx_ring
[i
]->hw_csum_rx_error
;
2740 adapter
->rx_ring
[i
]->hw_csum_rx_error
= 0;
2745 * ixgbevf_service_timer - Timer Call-back
2746 * @data: pointer to adapter cast into an unsigned long
2748 static void ixgbevf_service_timer(unsigned long data
)
2750 struct ixgbevf_adapter
*adapter
= (struct ixgbevf_adapter
*)data
;
2752 /* Reset the timer */
2753 mod_timer(&adapter
->service_timer
, (HZ
* 2) + jiffies
);
2755 ixgbevf_service_event_schedule(adapter
);
2758 static void ixgbevf_reset_subtask(struct ixgbevf_adapter
*adapter
)
2760 if (!(adapter
->flags
& IXGBEVF_FLAG_RESET_REQUESTED
))
2763 adapter
->flags
&= ~IXGBEVF_FLAG_RESET_REQUESTED
;
2765 /* If we're already down or resetting, just bail */
2766 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2767 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2770 adapter
->tx_timeout_count
++;
2772 ixgbevf_reinit_locked(adapter
);
2776 * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
2777 * @adapter: pointer to the device adapter structure
2779 * This function serves two purposes. First it strobes the interrupt lines
2780 * in order to make certain interrupts are occurring. Secondly it sets the
2781 * bits needed to check for TX hangs. As a result we should immediately
2782 * determine if a hang has occurred.
2784 static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter
*adapter
)
2786 struct ixgbe_hw
*hw
= &adapter
->hw
;
2790 /* If we're down or resetting, just bail */
2791 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2792 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2795 /* Force detection of hung controller */
2796 if (netif_carrier_ok(adapter
->netdev
)) {
2797 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2798 set_check_for_tx_hang(adapter
->tx_ring
[i
]);
2801 /* get one bit for every active Tx/Rx interrupt vector */
2802 for (i
= 0; i
< adapter
->num_msix_vectors
- NON_Q_VECTORS
; i
++) {
2803 struct ixgbevf_q_vector
*qv
= adapter
->q_vector
[i
];
2805 if (qv
->rx
.ring
|| qv
->tx
.ring
)
2809 /* Cause software interrupt to ensure rings are cleaned */
2810 IXGBE_WRITE_REG(hw
, IXGBE_VTEICS
, eics
);
2814 * ixgbevf_watchdog_update_link - update the link status
2815 * @adapter: pointer to the device adapter structure
2817 static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter
*adapter
)
2819 struct ixgbe_hw
*hw
= &adapter
->hw
;
2820 u32 link_speed
= adapter
->link_speed
;
2821 bool link_up
= adapter
->link_up
;
2824 spin_lock_bh(&adapter
->mbx_lock
);
2826 err
= hw
->mac
.ops
.check_link(hw
, &link_speed
, &link_up
, false);
2828 spin_unlock_bh(&adapter
->mbx_lock
);
2830 /* if check for link returns error we will need to reset */
2831 if (err
&& time_after(jiffies
, adapter
->last_reset
+ (10 * HZ
))) {
2832 adapter
->flags
|= IXGBEVF_FLAG_RESET_REQUESTED
;
2836 adapter
->link_up
= link_up
;
2837 adapter
->link_speed
= link_speed
;
2841 * ixgbevf_watchdog_link_is_up - update netif_carrier status and
2842 * print link up message
2843 * @adapter: pointer to the device adapter structure
2845 static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter
*adapter
)
2847 struct net_device
*netdev
= adapter
->netdev
;
2849 /* only continue if link was previously down */
2850 if (netif_carrier_ok(netdev
))
2853 dev_info(&adapter
->pdev
->dev
, "NIC Link is Up %s\n",
2854 (adapter
->link_speed
== IXGBE_LINK_SPEED_10GB_FULL
) ?
2856 (adapter
->link_speed
== IXGBE_LINK_SPEED_1GB_FULL
) ?
2858 (adapter
->link_speed
== IXGBE_LINK_SPEED_100_FULL
) ?
2862 netif_carrier_on(netdev
);
2866 * ixgbevf_watchdog_link_is_down - update netif_carrier status and
2867 * print link down message
2868 * @adapter: pointer to the adapter structure
2870 static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter
*adapter
)
2872 struct net_device
*netdev
= adapter
->netdev
;
2874 adapter
->link_speed
= 0;
2876 /* only continue if link was up previously */
2877 if (!netif_carrier_ok(netdev
))
2880 dev_info(&adapter
->pdev
->dev
, "NIC Link is Down\n");
2882 netif_carrier_off(netdev
);
2886 * ixgbevf_watchdog_subtask - worker thread to bring link up
2887 * @work: pointer to work_struct containing our data
2889 static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter
*adapter
)
2891 /* if interface is down do nothing */
2892 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2893 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2896 ixgbevf_watchdog_update_link(adapter
);
2898 if (adapter
->link_up
)
2899 ixgbevf_watchdog_link_is_up(adapter
);
2901 ixgbevf_watchdog_link_is_down(adapter
);
2903 ixgbevf_update_stats(adapter
);
2907 * ixgbevf_service_task - manages and runs subtasks
2908 * @work: pointer to work_struct containing our data
2910 static void ixgbevf_service_task(struct work_struct
*work
)
2912 struct ixgbevf_adapter
*adapter
= container_of(work
,
2913 struct ixgbevf_adapter
,
2915 struct ixgbe_hw
*hw
= &adapter
->hw
;
2917 if (IXGBE_REMOVED(hw
->hw_addr
)) {
2918 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
)) {
2920 ixgbevf_down(adapter
);
2926 ixgbevf_queue_reset_subtask(adapter
);
2927 ixgbevf_reset_subtask(adapter
);
2928 ixgbevf_watchdog_subtask(adapter
);
2929 ixgbevf_check_hang_subtask(adapter
);
2931 ixgbevf_service_event_complete(adapter
);
2935 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2936 * @tx_ring: Tx descriptor ring for a specific queue
2938 * Free all transmit software resources
2940 void ixgbevf_free_tx_resources(struct ixgbevf_ring
*tx_ring
)
2942 ixgbevf_clean_tx_ring(tx_ring
);
2944 vfree(tx_ring
->tx_buffer_info
);
2945 tx_ring
->tx_buffer_info
= NULL
;
2947 /* if not set, then don't free */
2951 dma_free_coherent(tx_ring
->dev
, tx_ring
->size
, tx_ring
->desc
,
2954 tx_ring
->desc
= NULL
;
2958 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2959 * @adapter: board private structure
2961 * Free all transmit software resources
2963 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter
*adapter
)
2967 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2968 if (adapter
->tx_ring
[i
]->desc
)
2969 ixgbevf_free_tx_resources(adapter
->tx_ring
[i
]);
2973 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2974 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
2976 * Return 0 on success, negative on failure
2978 int ixgbevf_setup_tx_resources(struct ixgbevf_ring
*tx_ring
)
2982 size
= sizeof(struct ixgbevf_tx_buffer
) * tx_ring
->count
;
2983 tx_ring
->tx_buffer_info
= vzalloc(size
);
2984 if (!tx_ring
->tx_buffer_info
)
2987 /* round up to nearest 4K */
2988 tx_ring
->size
= tx_ring
->count
* sizeof(union ixgbe_adv_tx_desc
);
2989 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
2991 tx_ring
->desc
= dma_alloc_coherent(tx_ring
->dev
, tx_ring
->size
,
2992 &tx_ring
->dma
, GFP_KERNEL
);
2999 vfree(tx_ring
->tx_buffer_info
);
3000 tx_ring
->tx_buffer_info
= NULL
;
3001 hw_dbg(&adapter
->hw
, "Unable to allocate memory for the transmit descriptor ring\n");
3006 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
3007 * @adapter: board private structure
3009 * If this function returns with an error, then it's possible one or
3010 * more of the rings is populated (while the rest are not). It is the
3011 * callers duty to clean those orphaned rings.
3013 * Return 0 on success, negative on failure
3015 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter
*adapter
)
3019 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
3020 err
= ixgbevf_setup_tx_resources(adapter
->tx_ring
[i
]);
3023 hw_dbg(&adapter
->hw
, "Allocation for Tx Queue %u failed\n", i
);
3031 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
3032 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
3034 * Returns 0 on success, negative on failure
3036 int ixgbevf_setup_rx_resources(struct ixgbevf_ring
*rx_ring
)
3040 size
= sizeof(struct ixgbevf_rx_buffer
) * rx_ring
->count
;
3041 rx_ring
->rx_buffer_info
= vzalloc(size
);
3042 if (!rx_ring
->rx_buffer_info
)
3045 /* Round up to nearest 4K */
3046 rx_ring
->size
= rx_ring
->count
* sizeof(union ixgbe_adv_rx_desc
);
3047 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
3049 rx_ring
->desc
= dma_alloc_coherent(rx_ring
->dev
, rx_ring
->size
,
3050 &rx_ring
->dma
, GFP_KERNEL
);
3057 vfree(rx_ring
->rx_buffer_info
);
3058 rx_ring
->rx_buffer_info
= NULL
;
3059 dev_err(rx_ring
->dev
, "Unable to allocate memory for the Rx descriptor ring\n");
3064 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
3065 * @adapter: board private structure
3067 * If this function returns with an error, then it's possible one or
3068 * more of the rings is populated (while the rest are not). It is the
3069 * callers duty to clean those orphaned rings.
3071 * Return 0 on success, negative on failure
3073 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter
*adapter
)
3077 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
3078 err
= ixgbevf_setup_rx_resources(adapter
->rx_ring
[i
]);
3081 hw_dbg(&adapter
->hw
, "Allocation for Rx Queue %u failed\n", i
);
3088 * ixgbevf_free_rx_resources - Free Rx Resources
3089 * @rx_ring: ring to clean the resources from
3091 * Free all receive software resources
3093 void ixgbevf_free_rx_resources(struct ixgbevf_ring
*rx_ring
)
3095 ixgbevf_clean_rx_ring(rx_ring
);
3097 vfree(rx_ring
->rx_buffer_info
);
3098 rx_ring
->rx_buffer_info
= NULL
;
3100 dma_free_coherent(rx_ring
->dev
, rx_ring
->size
, rx_ring
->desc
,
3103 rx_ring
->desc
= NULL
;
3107 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
3108 * @adapter: board private structure
3110 * Free all receive software resources
3112 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter
*adapter
)
3116 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
3117 if (adapter
->rx_ring
[i
]->desc
)
3118 ixgbevf_free_rx_resources(adapter
->rx_ring
[i
]);
3122 * ixgbevf_open - Called when a network interface is made active
3123 * @netdev: network interface device structure
3125 * Returns 0 on success, negative value on failure
3127 * The open entry point is called when a network interface is made
3128 * active by the system (IFF_UP). At this point all resources needed
3129 * for transmit and receive operations are allocated, the interrupt
3130 * handler is registered with the OS, the watchdog timer is started,
3131 * and the stack is notified that the interface is ready.
3133 static int ixgbevf_open(struct net_device
*netdev
)
3135 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3136 struct ixgbe_hw
*hw
= &adapter
->hw
;
3139 /* A previous failure to open the device because of a lack of
3140 * available MSIX vector resources may have reset the number
3141 * of msix vectors variable to zero. The only way to recover
3142 * is to unload/reload the driver and hope that the system has
3143 * been able to recover some MSIX vector resources.
3145 if (!adapter
->num_msix_vectors
)
3148 if (hw
->adapter_stopped
) {
3149 ixgbevf_reset(adapter
);
3150 /* if adapter is still stopped then PF isn't up and
3151 * the VF can't start.
3153 if (hw
->adapter_stopped
) {
3154 err
= IXGBE_ERR_MBX
;
3155 pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
3156 goto err_setup_reset
;
3160 /* disallow open during test */
3161 if (test_bit(__IXGBEVF_TESTING
, &adapter
->state
))
3164 netif_carrier_off(netdev
);
3166 /* allocate transmit descriptors */
3167 err
= ixgbevf_setup_all_tx_resources(adapter
);
3171 /* allocate receive descriptors */
3172 err
= ixgbevf_setup_all_rx_resources(adapter
);
3176 ixgbevf_configure(adapter
);
3178 /* Map the Tx/Rx rings to the vectors we were allotted.
3179 * if request_irq will be called in this function map_rings
3180 * must be called *before* up_complete
3182 ixgbevf_map_rings_to_vectors(adapter
);
3184 err
= ixgbevf_request_irq(adapter
);
3188 ixgbevf_up_complete(adapter
);
3193 ixgbevf_down(adapter
);
3195 ixgbevf_free_all_rx_resources(adapter
);
3197 ixgbevf_free_all_tx_resources(adapter
);
3198 ixgbevf_reset(adapter
);
3206 * ixgbevf_close - Disables a network interface
3207 * @netdev: network interface device structure
3209 * Returns 0, this is not allowed to fail
3211 * The close entry point is called when an interface is de-activated
3212 * by the OS. The hardware is still under the drivers control, but
3213 * needs to be disabled. A global MAC reset is issued to stop the
3214 * hardware, and all transmit and receive resources are freed.
3216 static int ixgbevf_close(struct net_device
*netdev
)
3218 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3220 ixgbevf_down(adapter
);
3221 ixgbevf_free_irq(adapter
);
3223 ixgbevf_free_all_tx_resources(adapter
);
3224 ixgbevf_free_all_rx_resources(adapter
);
3229 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter
*adapter
)
3231 struct net_device
*dev
= adapter
->netdev
;
3233 if (!(adapter
->flags
& IXGBEVF_FLAG_QUEUE_RESET_REQUESTED
))
3236 adapter
->flags
&= ~IXGBEVF_FLAG_QUEUE_RESET_REQUESTED
;
3238 /* if interface is down do nothing */
3239 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
3240 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
3243 /* Hardware has to reinitialize queues and interrupts to
3244 * match packet buffer alignment. Unfortunately, the
3245 * hardware is not flexible enough to do this dynamically.
3247 if (netif_running(dev
))
3250 ixgbevf_clear_interrupt_scheme(adapter
);
3251 ixgbevf_init_interrupt_scheme(adapter
);
3253 if (netif_running(dev
))
3257 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring
*tx_ring
,
3258 u32 vlan_macip_lens
, u32 type_tucmd
,
3261 struct ixgbe_adv_tx_context_desc
*context_desc
;
3262 u16 i
= tx_ring
->next_to_use
;
3264 context_desc
= IXGBEVF_TX_CTXTDESC(tx_ring
, i
);
3267 tx_ring
->next_to_use
= (i
< tx_ring
->count
) ? i
: 0;
3269 /* set bits to identify this as an advanced context descriptor */
3270 type_tucmd
|= IXGBE_TXD_CMD_DEXT
| IXGBE_ADVTXD_DTYP_CTXT
;
3272 context_desc
->vlan_macip_lens
= cpu_to_le32(vlan_macip_lens
);
3273 context_desc
->seqnum_seed
= 0;
3274 context_desc
->type_tucmd_mlhl
= cpu_to_le32(type_tucmd
);
3275 context_desc
->mss_l4len_idx
= cpu_to_le32(mss_l4len_idx
);
3278 static int ixgbevf_tso(struct ixgbevf_ring
*tx_ring
,
3279 struct ixgbevf_tx_buffer
*first
,
3282 struct sk_buff
*skb
= first
->skb
;
3283 u32 vlan_macip_lens
, type_tucmd
;
3284 u32 mss_l4len_idx
, l4len
;
3287 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
3290 if (!skb_is_gso(skb
))
3293 err
= skb_cow_head(skb
, 0);
3297 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3298 type_tucmd
= IXGBE_ADVTXD_TUCMD_L4T_TCP
;
3300 if (first
->protocol
== htons(ETH_P_IP
)) {
3301 struct iphdr
*iph
= ip_hdr(skb
);
3305 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
3309 type_tucmd
|= IXGBE_ADVTXD_TUCMD_IPV4
;
3310 first
->tx_flags
|= IXGBE_TX_FLAGS_TSO
|
3311 IXGBE_TX_FLAGS_CSUM
|
3312 IXGBE_TX_FLAGS_IPV4
;
3313 } else if (skb_is_gso_v6(skb
)) {
3314 ipv6_hdr(skb
)->payload_len
= 0;
3315 tcp_hdr(skb
)->check
=
3316 ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
3317 &ipv6_hdr(skb
)->daddr
,
3319 first
->tx_flags
|= IXGBE_TX_FLAGS_TSO
|
3320 IXGBE_TX_FLAGS_CSUM
;
3323 /* compute header lengths */
3324 l4len
= tcp_hdrlen(skb
);
3326 *hdr_len
= skb_transport_offset(skb
) + l4len
;
3328 /* update GSO size and bytecount with header size */
3329 first
->gso_segs
= skb_shinfo(skb
)->gso_segs
;
3330 first
->bytecount
+= (first
->gso_segs
- 1) * *hdr_len
;
3332 /* mss_l4len_id: use 1 as index for TSO */
3333 mss_l4len_idx
= l4len
<< IXGBE_ADVTXD_L4LEN_SHIFT
;
3334 mss_l4len_idx
|= skb_shinfo(skb
)->gso_size
<< IXGBE_ADVTXD_MSS_SHIFT
;
3335 mss_l4len_idx
|= 1 << IXGBE_ADVTXD_IDX_SHIFT
;
3337 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
3338 vlan_macip_lens
= skb_network_header_len(skb
);
3339 vlan_macip_lens
|= skb_network_offset(skb
) << IXGBE_ADVTXD_MACLEN_SHIFT
;
3340 vlan_macip_lens
|= first
->tx_flags
& IXGBE_TX_FLAGS_VLAN_MASK
;
3342 ixgbevf_tx_ctxtdesc(tx_ring
, vlan_macip_lens
,
3343 type_tucmd
, mss_l4len_idx
);
3348 static void ixgbevf_tx_csum(struct ixgbevf_ring
*tx_ring
,
3349 struct ixgbevf_tx_buffer
*first
)
3351 struct sk_buff
*skb
= first
->skb
;
3352 u32 vlan_macip_lens
= 0;
3353 u32 mss_l4len_idx
= 0;
3356 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
3359 switch (first
->protocol
) {
3360 case htons(ETH_P_IP
):
3361 vlan_macip_lens
|= skb_network_header_len(skb
);
3362 type_tucmd
|= IXGBE_ADVTXD_TUCMD_IPV4
;
3363 l4_hdr
= ip_hdr(skb
)->protocol
;
3365 case htons(ETH_P_IPV6
):
3366 vlan_macip_lens
|= skb_network_header_len(skb
);
3367 l4_hdr
= ipv6_hdr(skb
)->nexthdr
;
3370 if (unlikely(net_ratelimit())) {
3371 dev_warn(tx_ring
->dev
,
3372 "partial checksum but proto=%x!\n",
3380 type_tucmd
|= IXGBE_ADVTXD_TUCMD_L4T_TCP
;
3381 mss_l4len_idx
= tcp_hdrlen(skb
) <<
3382 IXGBE_ADVTXD_L4LEN_SHIFT
;
3385 type_tucmd
|= IXGBE_ADVTXD_TUCMD_L4T_SCTP
;
3386 mss_l4len_idx
= sizeof(struct sctphdr
) <<
3387 IXGBE_ADVTXD_L4LEN_SHIFT
;
3390 mss_l4len_idx
= sizeof(struct udphdr
) <<
3391 IXGBE_ADVTXD_L4LEN_SHIFT
;
3394 if (unlikely(net_ratelimit())) {
3395 dev_warn(tx_ring
->dev
,
3396 "partial checksum but l4 proto=%x!\n",
3402 /* update TX checksum flag */
3403 first
->tx_flags
|= IXGBE_TX_FLAGS_CSUM
;
3406 /* vlan_macip_lens: MACLEN, VLAN tag */
3407 vlan_macip_lens
|= skb_network_offset(skb
) << IXGBE_ADVTXD_MACLEN_SHIFT
;
3408 vlan_macip_lens
|= first
->tx_flags
& IXGBE_TX_FLAGS_VLAN_MASK
;
3410 ixgbevf_tx_ctxtdesc(tx_ring
, vlan_macip_lens
,
3411 type_tucmd
, mss_l4len_idx
);
3414 static __le32
ixgbevf_tx_cmd_type(u32 tx_flags
)
3416 /* set type for advanced descriptor with frame checksum insertion */
3417 __le32 cmd_type
= cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA
|
3418 IXGBE_ADVTXD_DCMD_IFCS
|
3419 IXGBE_ADVTXD_DCMD_DEXT
);
3421 /* set HW VLAN bit if VLAN is present */
3422 if (tx_flags
& IXGBE_TX_FLAGS_VLAN
)
3423 cmd_type
|= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE
);
3425 /* set segmentation enable bits for TSO/FSO */
3426 if (tx_flags
& IXGBE_TX_FLAGS_TSO
)
3427 cmd_type
|= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE
);
3432 static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc
*tx_desc
,
3433 u32 tx_flags
, unsigned int paylen
)
3435 __le32 olinfo_status
= cpu_to_le32(paylen
<< IXGBE_ADVTXD_PAYLEN_SHIFT
);
3437 /* enable L4 checksum for TSO and TX checksum offload */
3438 if (tx_flags
& IXGBE_TX_FLAGS_CSUM
)
3439 olinfo_status
|= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM
);
3441 /* enble IPv4 checksum for TSO */
3442 if (tx_flags
& IXGBE_TX_FLAGS_IPV4
)
3443 olinfo_status
|= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM
);
3445 /* use index 1 context for TSO/FSO/FCOE */
3446 if (tx_flags
& IXGBE_TX_FLAGS_TSO
)
3447 olinfo_status
|= cpu_to_le32(1 << IXGBE_ADVTXD_IDX_SHIFT
);
3449 /* Check Context must be set if Tx switch is enabled, which it
3450 * always is for case where virtual functions are running
3452 olinfo_status
|= cpu_to_le32(IXGBE_ADVTXD_CC
);
3454 tx_desc
->read
.olinfo_status
= olinfo_status
;
3457 static void ixgbevf_tx_map(struct ixgbevf_ring
*tx_ring
,
3458 struct ixgbevf_tx_buffer
*first
,
3462 struct sk_buff
*skb
= first
->skb
;
3463 struct ixgbevf_tx_buffer
*tx_buffer
;
3464 union ixgbe_adv_tx_desc
*tx_desc
;
3465 struct skb_frag_struct
*frag
= &skb_shinfo(skb
)->frags
[0];
3466 unsigned int data_len
= skb
->data_len
;
3467 unsigned int size
= skb_headlen(skb
);
3468 unsigned int paylen
= skb
->len
- hdr_len
;
3469 u32 tx_flags
= first
->tx_flags
;
3471 u16 i
= tx_ring
->next_to_use
;
3473 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, i
);
3475 ixgbevf_tx_olinfo_status(tx_desc
, tx_flags
, paylen
);
3476 cmd_type
= ixgbevf_tx_cmd_type(tx_flags
);
3478 dma
= dma_map_single(tx_ring
->dev
, skb
->data
, size
, DMA_TO_DEVICE
);
3479 if (dma_mapping_error(tx_ring
->dev
, dma
))
3482 /* record length, and DMA address */
3483 dma_unmap_len_set(first
, len
, size
);
3484 dma_unmap_addr_set(first
, dma
, dma
);
3486 tx_desc
->read
.buffer_addr
= cpu_to_le64(dma
);
3489 while (unlikely(size
> IXGBE_MAX_DATA_PER_TXD
)) {
3490 tx_desc
->read
.cmd_type_len
=
3491 cmd_type
| cpu_to_le32(IXGBE_MAX_DATA_PER_TXD
);
3495 if (i
== tx_ring
->count
) {
3496 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
3500 dma
+= IXGBE_MAX_DATA_PER_TXD
;
3501 size
-= IXGBE_MAX_DATA_PER_TXD
;
3503 tx_desc
->read
.buffer_addr
= cpu_to_le64(dma
);
3504 tx_desc
->read
.olinfo_status
= 0;
3507 if (likely(!data_len
))
3510 tx_desc
->read
.cmd_type_len
= cmd_type
| cpu_to_le32(size
);
3514 if (i
== tx_ring
->count
) {
3515 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
3519 size
= skb_frag_size(frag
);
3522 dma
= skb_frag_dma_map(tx_ring
->dev
, frag
, 0, size
,
3524 if (dma_mapping_error(tx_ring
->dev
, dma
))
3527 tx_buffer
= &tx_ring
->tx_buffer_info
[i
];
3528 dma_unmap_len_set(tx_buffer
, len
, size
);
3529 dma_unmap_addr_set(tx_buffer
, dma
, dma
);
3531 tx_desc
->read
.buffer_addr
= cpu_to_le64(dma
);
3532 tx_desc
->read
.olinfo_status
= 0;
3537 /* write last descriptor with RS and EOP bits */
3538 cmd_type
|= cpu_to_le32(size
) | cpu_to_le32(IXGBE_TXD_CMD
);
3539 tx_desc
->read
.cmd_type_len
= cmd_type
;
3541 /* set the timestamp */
3542 first
->time_stamp
= jiffies
;
3544 /* Force memory writes to complete before letting h/w know there
3545 * are new descriptors to fetch. (Only applicable for weak-ordered
3546 * memory model archs, such as IA-64).
3548 * We also need this memory barrier (wmb) to make certain all of the
3549 * status bits have been updated before next_to_watch is written.
3553 /* set next_to_watch value indicating a packet is present */
3554 first
->next_to_watch
= tx_desc
;
3557 if (i
== tx_ring
->count
)
3560 tx_ring
->next_to_use
= i
;
3562 /* notify HW of packet */
3563 ixgbevf_write_tail(tx_ring
, i
);
3567 dev_err(tx_ring
->dev
, "TX DMA map failed\n");
3569 /* clear dma mappings for failed tx_buffer_info map */
3571 tx_buffer
= &tx_ring
->tx_buffer_info
[i
];
3572 ixgbevf_unmap_and_free_tx_resource(tx_ring
, tx_buffer
);
3573 if (tx_buffer
== first
)
3580 tx_ring
->next_to_use
= i
;
3583 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring
*tx_ring
, int size
)
3585 netif_stop_subqueue(tx_ring
->netdev
, tx_ring
->queue_index
);
3586 /* Herbert's original patch had:
3587 * smp_mb__after_netif_stop_queue();
3588 * but since that doesn't exist yet, just open code it.
3592 /* We need to check again in a case another CPU has just
3593 * made room available.
3595 if (likely(ixgbevf_desc_unused(tx_ring
) < size
))
3598 /* A reprieve! - use start_queue because it doesn't call schedule */
3599 netif_start_subqueue(tx_ring
->netdev
, tx_ring
->queue_index
);
3600 ++tx_ring
->tx_stats
.restart_queue
;
3605 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring
*tx_ring
, int size
)
3607 if (likely(ixgbevf_desc_unused(tx_ring
) >= size
))
3609 return __ixgbevf_maybe_stop_tx(tx_ring
, size
);
3612 static int ixgbevf_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
3614 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3615 struct ixgbevf_tx_buffer
*first
;
3616 struct ixgbevf_ring
*tx_ring
;
3619 u16 count
= TXD_USE_COUNT(skb_headlen(skb
));
3620 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3624 u8
*dst_mac
= skb_header_pointer(skb
, 0, 0, NULL
);
3626 if (!dst_mac
|| is_link_local_ether_addr(dst_mac
)) {
3627 dev_kfree_skb_any(skb
);
3628 return NETDEV_TX_OK
;
3631 tx_ring
= adapter
->tx_ring
[skb
->queue_mapping
];
3633 /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
3634 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
3635 * + 2 desc gap to keep tail from touching head,
3636 * + 1 desc for context descriptor,
3637 * otherwise try next time
3639 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3640 for (f
= 0; f
< skb_shinfo(skb
)->nr_frags
; f
++)
3641 count
+= TXD_USE_COUNT(skb_shinfo(skb
)->frags
[f
].size
);
3643 count
+= skb_shinfo(skb
)->nr_frags
;
3645 if (ixgbevf_maybe_stop_tx(tx_ring
, count
+ 3)) {
3646 tx_ring
->tx_stats
.tx_busy
++;
3647 return NETDEV_TX_BUSY
;
3650 /* record the location of the first descriptor for this packet */
3651 first
= &tx_ring
->tx_buffer_info
[tx_ring
->next_to_use
];
3653 first
->bytecount
= skb
->len
;
3654 first
->gso_segs
= 1;
3656 if (skb_vlan_tag_present(skb
)) {
3657 tx_flags
|= skb_vlan_tag_get(skb
);
3658 tx_flags
<<= IXGBE_TX_FLAGS_VLAN_SHIFT
;
3659 tx_flags
|= IXGBE_TX_FLAGS_VLAN
;
3662 /* record initial flags and protocol */
3663 first
->tx_flags
= tx_flags
;
3664 first
->protocol
= vlan_get_protocol(skb
);
3666 tso
= ixgbevf_tso(tx_ring
, first
, &hdr_len
);
3670 ixgbevf_tx_csum(tx_ring
, first
);
3672 ixgbevf_tx_map(tx_ring
, first
, hdr_len
);
3674 ixgbevf_maybe_stop_tx(tx_ring
, DESC_NEEDED
);
3676 return NETDEV_TX_OK
;
3679 dev_kfree_skb_any(first
->skb
);
3682 return NETDEV_TX_OK
;
3686 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3687 * @netdev: network interface device structure
3688 * @p: pointer to an address structure
3690 * Returns 0 on success, negative on failure
3692 static int ixgbevf_set_mac(struct net_device
*netdev
, void *p
)
3694 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3695 struct ixgbe_hw
*hw
= &adapter
->hw
;
3696 struct sockaddr
*addr
= p
;
3698 if (!is_valid_ether_addr(addr
->sa_data
))
3699 return -EADDRNOTAVAIL
;
3701 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
3702 memcpy(hw
->mac
.addr
, addr
->sa_data
, netdev
->addr_len
);
3704 spin_lock_bh(&adapter
->mbx_lock
);
3706 hw
->mac
.ops
.set_rar(hw
, 0, hw
->mac
.addr
, 0);
3708 spin_unlock_bh(&adapter
->mbx_lock
);
3714 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3715 * @netdev: network interface device structure
3716 * @new_mtu: new value for maximum frame size
3718 * Returns 0 on success, negative on failure
3720 static int ixgbevf_change_mtu(struct net_device
*netdev
, int new_mtu
)
3722 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3723 struct ixgbe_hw
*hw
= &adapter
->hw
;
3724 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
3725 int max_possible_frame
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3727 switch (adapter
->hw
.api_version
) {
3728 case ixgbe_mbox_api_11
:
3729 case ixgbe_mbox_api_12
:
3730 max_possible_frame
= IXGBE_MAX_JUMBO_FRAME_SIZE
;
3733 if (adapter
->hw
.mac
.type
!= ixgbe_mac_82599_vf
)
3734 max_possible_frame
= IXGBE_MAX_JUMBO_FRAME_SIZE
;
3738 /* MTU < 68 is an error and causes problems on some kernels */
3739 if ((new_mtu
< 68) || (max_frame
> max_possible_frame
))
3742 hw_dbg(hw
, "changing MTU from %d to %d\n",
3743 netdev
->mtu
, new_mtu
);
3744 /* must set new MTU before calling down or up */
3745 netdev
->mtu
= new_mtu
;
3747 /* notify the PF of our intent to use this size of frame */
3748 ixgbevf_rlpml_set_vf(hw
, max_frame
);
3753 #ifdef CONFIG_NET_POLL_CONTROLLER
3754 /* Polling 'interrupt' - used by things like netconsole to send skbs
3755 * without having to re-enable interrupts. It's not called while
3756 * the interrupt routine is executing.
3758 static void ixgbevf_netpoll(struct net_device
*netdev
)
3760 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3763 /* if interface is down do nothing */
3764 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
))
3766 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
3767 ixgbevf_msix_clean_rings(0, adapter
->q_vector
[i
]);
3769 #endif /* CONFIG_NET_POLL_CONTROLLER */
3771 static int ixgbevf_suspend(struct pci_dev
*pdev
, pm_message_t state
)
3773 struct net_device
*netdev
= pci_get_drvdata(pdev
);
3774 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3779 netif_device_detach(netdev
);
3781 if (netif_running(netdev
)) {
3783 ixgbevf_down(adapter
);
3784 ixgbevf_free_irq(adapter
);
3785 ixgbevf_free_all_tx_resources(adapter
);
3786 ixgbevf_free_all_rx_resources(adapter
);
3790 ixgbevf_clear_interrupt_scheme(adapter
);
3793 retval
= pci_save_state(pdev
);
3798 if (!test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
))
3799 pci_disable_device(pdev
);
3805 static int ixgbevf_resume(struct pci_dev
*pdev
)
3807 struct net_device
*netdev
= pci_get_drvdata(pdev
);
3808 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3811 pci_restore_state(pdev
);
3812 /* pci_restore_state clears dev->state_saved so call
3813 * pci_save_state to restore it.
3815 pci_save_state(pdev
);
3817 err
= pci_enable_device_mem(pdev
);
3819 dev_err(&pdev
->dev
, "Cannot enable PCI device from suspend\n");
3822 smp_mb__before_atomic();
3823 clear_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
3824 pci_set_master(pdev
);
3826 ixgbevf_reset(adapter
);
3829 err
= ixgbevf_init_interrupt_scheme(adapter
);
3832 dev_err(&pdev
->dev
, "Cannot initialize interrupts\n");
3836 if (netif_running(netdev
)) {
3837 err
= ixgbevf_open(netdev
);
3842 netif_device_attach(netdev
);
3847 #endif /* CONFIG_PM */
3848 static void ixgbevf_shutdown(struct pci_dev
*pdev
)
3850 ixgbevf_suspend(pdev
, PMSG_SUSPEND
);
3853 static struct rtnl_link_stats64
*ixgbevf_get_stats(struct net_device
*netdev
,
3854 struct rtnl_link_stats64
*stats
)
3856 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3859 const struct ixgbevf_ring
*ring
;
3862 ixgbevf_update_stats(adapter
);
3864 stats
->multicast
= adapter
->stats
.vfmprc
- adapter
->stats
.base_vfmprc
;
3866 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
3867 ring
= adapter
->rx_ring
[i
];
3869 start
= u64_stats_fetch_begin_irq(&ring
->syncp
);
3870 bytes
= ring
->stats
.bytes
;
3871 packets
= ring
->stats
.packets
;
3872 } while (u64_stats_fetch_retry_irq(&ring
->syncp
, start
));
3873 stats
->rx_bytes
+= bytes
;
3874 stats
->rx_packets
+= packets
;
3877 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
3878 ring
= adapter
->tx_ring
[i
];
3880 start
= u64_stats_fetch_begin_irq(&ring
->syncp
);
3881 bytes
= ring
->stats
.bytes
;
3882 packets
= ring
->stats
.packets
;
3883 } while (u64_stats_fetch_retry_irq(&ring
->syncp
, start
));
3884 stats
->tx_bytes
+= bytes
;
3885 stats
->tx_packets
+= packets
;
3891 static const struct net_device_ops ixgbevf_netdev_ops
= {
3892 .ndo_open
= ixgbevf_open
,
3893 .ndo_stop
= ixgbevf_close
,
3894 .ndo_start_xmit
= ixgbevf_xmit_frame
,
3895 .ndo_set_rx_mode
= ixgbevf_set_rx_mode
,
3896 .ndo_get_stats64
= ixgbevf_get_stats
,
3897 .ndo_validate_addr
= eth_validate_addr
,
3898 .ndo_set_mac_address
= ixgbevf_set_mac
,
3899 .ndo_change_mtu
= ixgbevf_change_mtu
,
3900 .ndo_tx_timeout
= ixgbevf_tx_timeout
,
3901 .ndo_vlan_rx_add_vid
= ixgbevf_vlan_rx_add_vid
,
3902 .ndo_vlan_rx_kill_vid
= ixgbevf_vlan_rx_kill_vid
,
3903 #ifdef CONFIG_NET_RX_BUSY_POLL
3904 .ndo_busy_poll
= ixgbevf_busy_poll_recv
,
3906 #ifdef CONFIG_NET_POLL_CONTROLLER
3907 .ndo_poll_controller
= ixgbevf_netpoll
,
3909 .ndo_features_check
= passthru_features_check
,
3912 static void ixgbevf_assign_netdev_ops(struct net_device
*dev
)
3914 dev
->netdev_ops
= &ixgbevf_netdev_ops
;
3915 ixgbevf_set_ethtool_ops(dev
);
3916 dev
->watchdog_timeo
= 5 * HZ
;
3920 * ixgbevf_probe - Device Initialization Routine
3921 * @pdev: PCI device information struct
3922 * @ent: entry in ixgbevf_pci_tbl
3924 * Returns 0 on success, negative on failure
3926 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3927 * The OS initialization, configuring of the adapter private structure,
3928 * and a hardware reset occur.
3930 static int ixgbevf_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
3932 struct net_device
*netdev
;
3933 struct ixgbevf_adapter
*adapter
= NULL
;
3934 struct ixgbe_hw
*hw
= NULL
;
3935 const struct ixgbevf_info
*ii
= ixgbevf_info_tbl
[ent
->driver_data
];
3936 int err
, pci_using_dac
;
3937 bool disable_dev
= false;
3939 err
= pci_enable_device(pdev
);
3943 if (!dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(64))) {
3946 err
= dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(32));
3948 dev_err(&pdev
->dev
, "No usable DMA configuration, aborting\n");
3954 err
= pci_request_regions(pdev
, ixgbevf_driver_name
);
3956 dev_err(&pdev
->dev
, "pci_request_regions failed 0x%x\n", err
);
3960 pci_set_master(pdev
);
3962 netdev
= alloc_etherdev_mq(sizeof(struct ixgbevf_adapter
),
3966 goto err_alloc_etherdev
;
3969 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
3971 adapter
= netdev_priv(netdev
);
3973 adapter
->netdev
= netdev
;
3974 adapter
->pdev
= pdev
;
3977 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
3979 /* call save state here in standalone driver because it relies on
3980 * adapter struct to exist, and needs to call netdev_priv
3982 pci_save_state(pdev
);
3984 hw
->hw_addr
= ioremap(pci_resource_start(pdev
, 0),
3985 pci_resource_len(pdev
, 0));
3986 adapter
->io_addr
= hw
->hw_addr
;
3992 ixgbevf_assign_netdev_ops(netdev
);
3995 memcpy(&hw
->mac
.ops
, ii
->mac_ops
, sizeof(hw
->mac
.ops
));
3996 hw
->mac
.type
= ii
->mac
;
3998 memcpy(&hw
->mbx
.ops
, &ixgbevf_mbx_ops
,
3999 sizeof(struct ixgbe_mbx_operations
));
4001 /* setup the private structure */
4002 err
= ixgbevf_sw_init(adapter
);
4006 /* The HW MAC address was set and/or determined in sw_init */
4007 if (!is_valid_ether_addr(netdev
->dev_addr
)) {
4008 pr_err("invalid MAC address\n");
4013 netdev
->hw_features
= NETIF_F_SG
|
4020 netdev
->features
= netdev
->hw_features
|
4021 NETIF_F_HW_VLAN_CTAG_TX
|
4022 NETIF_F_HW_VLAN_CTAG_RX
|
4023 NETIF_F_HW_VLAN_CTAG_FILTER
;
4025 netdev
->vlan_features
|= NETIF_F_TSO
|
4032 netdev
->features
|= NETIF_F_HIGHDMA
;
4034 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
4036 if (IXGBE_REMOVED(hw
->hw_addr
)) {
4041 setup_timer(&adapter
->service_timer
, &ixgbevf_service_timer
,
4042 (unsigned long)adapter
);
4044 INIT_WORK(&adapter
->service_task
, ixgbevf_service_task
);
4045 set_bit(__IXGBEVF_SERVICE_INITED
, &adapter
->state
);
4046 clear_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
);
4048 err
= ixgbevf_init_interrupt_scheme(adapter
);
4052 strcpy(netdev
->name
, "eth%d");
4054 err
= register_netdev(netdev
);
4058 pci_set_drvdata(pdev
, netdev
);
4059 netif_carrier_off(netdev
);
4061 ixgbevf_init_last_counter_stats(adapter
);
4063 /* print the VF info */
4064 dev_info(&pdev
->dev
, "%pM\n", netdev
->dev_addr
);
4065 dev_info(&pdev
->dev
, "MAC: %d\n", hw
->mac
.type
);
4067 switch (hw
->mac
.type
) {
4068 case ixgbe_mac_X550_vf
:
4069 dev_info(&pdev
->dev
, "Intel(R) X550 Virtual Function\n");
4071 case ixgbe_mac_X540_vf
:
4072 dev_info(&pdev
->dev
, "Intel(R) X540 Virtual Function\n");
4074 case ixgbe_mac_82599_vf
:
4076 dev_info(&pdev
->dev
, "Intel(R) 82599 Virtual Function\n");
4083 ixgbevf_clear_interrupt_scheme(adapter
);
4085 ixgbevf_reset_interrupt_capability(adapter
);
4086 iounmap(adapter
->io_addr
);
4088 disable_dev
= !test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
4089 free_netdev(netdev
);
4091 pci_release_regions(pdev
);
4094 if (!adapter
|| disable_dev
)
4095 pci_disable_device(pdev
);
4100 * ixgbevf_remove - Device Removal Routine
4101 * @pdev: PCI device information struct
4103 * ixgbevf_remove is called by the PCI subsystem to alert the driver
4104 * that it should release a PCI device. The could be caused by a
4105 * Hot-Plug event, or because the driver is going to be removed from
4108 static void ixgbevf_remove(struct pci_dev
*pdev
)
4110 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4111 struct ixgbevf_adapter
*adapter
;
4117 adapter
= netdev_priv(netdev
);
4119 set_bit(__IXGBEVF_REMOVING
, &adapter
->state
);
4120 cancel_work_sync(&adapter
->service_task
);
4122 if (netdev
->reg_state
== NETREG_REGISTERED
)
4123 unregister_netdev(netdev
);
4125 ixgbevf_clear_interrupt_scheme(adapter
);
4126 ixgbevf_reset_interrupt_capability(adapter
);
4128 iounmap(adapter
->io_addr
);
4129 pci_release_regions(pdev
);
4131 hw_dbg(&adapter
->hw
, "Remove complete\n");
4133 disable_dev
= !test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
4134 free_netdev(netdev
);
4137 pci_disable_device(pdev
);
4141 * ixgbevf_io_error_detected - called when PCI error is detected
4142 * @pdev: Pointer to PCI device
4143 * @state: The current pci connection state
4145 * This function is called after a PCI bus error affecting
4146 * this device has been detected.
4148 static pci_ers_result_t
ixgbevf_io_error_detected(struct pci_dev
*pdev
,
4149 pci_channel_state_t state
)
4151 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4152 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
4154 if (!test_bit(__IXGBEVF_SERVICE_INITED
, &adapter
->state
))
4155 return PCI_ERS_RESULT_DISCONNECT
;
4158 netif_device_detach(netdev
);
4160 if (state
== pci_channel_io_perm_failure
) {
4162 return PCI_ERS_RESULT_DISCONNECT
;
4165 if (netif_running(netdev
))
4166 ixgbevf_down(adapter
);
4168 if (!test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
))
4169 pci_disable_device(pdev
);
4172 /* Request a slot slot reset. */
4173 return PCI_ERS_RESULT_NEED_RESET
;
4177 * ixgbevf_io_slot_reset - called after the pci bus has been reset.
4178 * @pdev: Pointer to PCI device
4180 * Restart the card from scratch, as if from a cold-boot. Implementation
4181 * resembles the first-half of the ixgbevf_resume routine.
4183 static pci_ers_result_t
ixgbevf_io_slot_reset(struct pci_dev
*pdev
)
4185 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4186 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
4188 if (pci_enable_device_mem(pdev
)) {
4190 "Cannot re-enable PCI device after reset.\n");
4191 return PCI_ERS_RESULT_DISCONNECT
;
4194 smp_mb__before_atomic();
4195 clear_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
4196 pci_set_master(pdev
);
4198 ixgbevf_reset(adapter
);
4200 return PCI_ERS_RESULT_RECOVERED
;
4204 * ixgbevf_io_resume - called when traffic can start flowing again.
4205 * @pdev: Pointer to PCI device
4207 * This callback is called when the error recovery driver tells us that
4208 * its OK to resume normal operation. Implementation resembles the
4209 * second-half of the ixgbevf_resume routine.
4211 static void ixgbevf_io_resume(struct pci_dev
*pdev
)
4213 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4214 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
4216 if (netif_running(netdev
))
4217 ixgbevf_up(adapter
);
4219 netif_device_attach(netdev
);
4222 /* PCI Error Recovery (ERS) */
4223 static const struct pci_error_handlers ixgbevf_err_handler
= {
4224 .error_detected
= ixgbevf_io_error_detected
,
4225 .slot_reset
= ixgbevf_io_slot_reset
,
4226 .resume
= ixgbevf_io_resume
,
4229 static struct pci_driver ixgbevf_driver
= {
4230 .name
= ixgbevf_driver_name
,
4231 .id_table
= ixgbevf_pci_tbl
,
4232 .probe
= ixgbevf_probe
,
4233 .remove
= ixgbevf_remove
,
4235 /* Power Management Hooks */
4236 .suspend
= ixgbevf_suspend
,
4237 .resume
= ixgbevf_resume
,
4239 .shutdown
= ixgbevf_shutdown
,
4240 .err_handler
= &ixgbevf_err_handler
4244 * ixgbevf_init_module - Driver Registration Routine
4246 * ixgbevf_init_module is the first routine called when the driver is
4247 * loaded. All it does is register with the PCI subsystem.
4249 static int __init
ixgbevf_init_module(void)
4253 pr_info("%s - version %s\n", ixgbevf_driver_string
,
4254 ixgbevf_driver_version
);
4256 pr_info("%s\n", ixgbevf_copyright
);
4258 ret
= pci_register_driver(&ixgbevf_driver
);
4262 module_init(ixgbevf_init_module
);
4265 * ixgbevf_exit_module - Driver Exit Cleanup Routine
4267 * ixgbevf_exit_module is called just before the driver is removed
4270 static void __exit
ixgbevf_exit_module(void)
4272 pci_unregister_driver(&ixgbevf_driver
);
4277 * ixgbevf_get_hw_dev_name - return device name string
4278 * used by hardware layer to print debugging information
4280 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw
*hw
)
4282 struct ixgbevf_adapter
*adapter
= hw
->back
;
4284 return adapter
->netdev
->name
;
4288 module_exit(ixgbevf_exit_module
);
4290 /* ixgbevf_main.c */